drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.21"
  25 #define TPACPI_SYSFS_VERSION 0x020200
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/kthread.h>
  58 #include <linux/freezer.h>
  59 #include <linux/delay.h>
  60
  61 #include <linux/nvram.h>
  62 #include <linux/proc_fs.h>
  63 #include <linux/sysfs.h>
  64 #include <linux/backlight.h>
  65 #include <linux/fb.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/hwmon.h>
  68 #include <linux/hwmon-sysfs.h>
  69 #include <linux/input.h>
  70 #include <linux/leds.h>
  71 #include <linux/rfkill.h>
  72 #include <asm/uaccess.h>
  73
  74 #include <linux/dmi.h>
  75 #include <linux/jiffies.h>
  76 #include <linux/workqueue.h>
  77
  78 #include <acpi/acpi_drivers.h>
  79
  80 #include <linux/pci_ids.h>
  81
  82
  83 /* ThinkPad CMOS commands */
  84 #define TP_CMOS_VOLUME_DOWN     0
  85 #define TP_CMOS_VOLUME_UP       1
  86 #define TP_CMOS_VOLUME_MUTE     2
  87 #define TP_CMOS_BRIGHTNESS_UP   4
  88 #define TP_CMOS_BRIGHTNESS_DOWN 5
  89 #define TP_CMOS_THINKLIGHT_ON   12
  90 #define TP_CMOS_THINKLIGHT_OFF  13
  91
  92 /* NVRAM Addresses */
  93 enum tp_nvram_addr {
  94         TP_NVRAM_ADDR_HK2               = 0x57,
  95         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  96         TP_NVRAM_ADDR_VIDEO             = 0x59,
  97         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  98         TP_NVRAM_ADDR_MIXER             = 0x60,
  99 };
 100
 101 /* NVRAM bit masks */
 102 enum {
 103         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 104         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 105         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 106         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 107         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 108         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 109         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 110         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 111         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 112         TP_NVRAM_MASK_MUTE              = 0x40,
 113         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 114         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 115         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 116 };
 117
 118 /* ACPI HIDs */
 119 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 120
 121 /* Input IDs */
 122 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 123 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 124
 125 /* ACPI \WGSV commands */
 126 enum {
 127         TP_ACPI_WGSV_GET_STATE          = 0x01, /* Get state information */
 128         TP_ACPI_WGSV_PWR_ON_ON_RESUME   = 0x02, /* Resume WWAN powered on */
 129         TP_ACPI_WGSV_PWR_OFF_ON_RESUME  = 0x03, /* Resume WWAN powered off */
 130         TP_ACPI_WGSV_SAVE_STATE         = 0x04, /* Save state for S4/S5 */
 131 };
 132
 133 /* TP_ACPI_WGSV_GET_STATE bits */
 134 enum {
 135         TP_ACPI_WGSV_STATE_WWANEXIST    = 0x0001, /* WWAN hw available */
 136         TP_ACPI_WGSV_STATE_WWANPWR      = 0x0002, /* WWAN radio enabled */
 137         TP_ACPI_WGSV_STATE_WWANPWRRES   = 0x0004, /* WWAN state at resume */
 138         TP_ACPI_WGSV_STATE_WWANBIOSOFF  = 0x0008, /* WWAN disabled in BIOS */
 139         TP_ACPI_WGSV_STATE_BLTHEXIST    = 0x0001, /* BLTH hw available */
 140         TP_ACPI_WGSV_STATE_BLTHPWR      = 0x0002, /* BLTH radio enabled */
 141         TP_ACPI_WGSV_STATE_BLTHPWRRES   = 0x0004, /* BLTH state at resume */
 142         TP_ACPI_WGSV_STATE_BLTHBIOSOFF  = 0x0008, /* BLTH disabled in BIOS */
 143         TP_ACPI_WGSV_STATE_UWBEXIST     = 0x0010, /* UWB hw available */
 144         TP_ACPI_WGSV_STATE_UWBPWR       = 0x0020, /* UWB radio enabled */
 145 };
 146
 147 /****************************************************************************
 148  * Main driver
 149  */
 150
 151 #define TPACPI_NAME "thinkpad"
 152 #define TPACPI_DESC "ThinkPad ACPI Extras"
 153 #define TPACPI_FILE TPACPI_NAME "_acpi"
 154 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 155 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 156
 157 #define TPACPI_PROC_DIR "ibm"
 158 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 159 #define TPACPI_DRVR_NAME TPACPI_FILE
 160 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 161 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 162
 163 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 164 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 165
 166 #define TPACPI_MAX_ACPI_ARGS 3
 167
 168 /* rfkill switches */
 169 enum {
 170         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
 171         TPACPI_RFK_WWAN_SW_ID,
 172 };
 173
 174 /* Debugging */
 175 #define TPACPI_LOG TPACPI_FILE ": "
 176 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 177 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 178 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 179 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 180
 181 #define TPACPI_DBG_ALL          0xffff
 182 #define TPACPI_DBG_INIT         0x0001
 183 #define TPACPI_DBG_EXIT         0x0002
 184 #define dbg_printk(a_dbg_level, format, arg...) \
 185         do { if (dbg_level & a_dbg_level) \
 186                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 187         } while (0)
 188 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 189 #define vdbg_printk(a_dbg_level, format, arg...) \
 190         dbg_printk(a_dbg_level, format, ## arg)
 191 static const char *str_supported(int is_supported);
 192 #else
 193 #define vdbg_printk(a_dbg_level, format, arg...)
 194 #endif
 195
 196 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 197 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 198 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 199
 200
 201 /****************************************************************************
 202  * Driver-wide structs and misc. variables
 203  */
 204
 205 struct ibm_struct;
 206
 207 struct tp_acpi_drv_struct {
 208         const struct acpi_device_id *hid;
 209         struct acpi_driver *driver;
 210
 211         void (*notify) (struct ibm_struct *, u32);
 212         acpi_handle *handle;
 213         u32 type;
 214         struct acpi_device *device;
 215 };
 216
 217 struct ibm_struct {
 218         char *name;
 219
 220         int (*read) (char *);
 221         int (*write) (char *);
 222         void (*exit) (void);
 223         void (*resume) (void);
 224         void (*suspend) (pm_message_t state);
 225
 226         struct list_head all_drivers;
 227
 228         struct tp_acpi_drv_struct *acpi;
 229
 230         struct {
 231                 u8 acpi_driver_registered:1;
 232                 u8 acpi_notify_installed:1;
 233                 u8 proc_created:1;
 234                 u8 init_called:1;
 235                 u8 experimental:1;
 236         } flags;
 237 };
 238
 239 struct ibm_init_struct {
 240         char param[32];
 241
 242         int (*init) (struct ibm_init_struct *);
 243         struct ibm_struct *data;
 244 };
 245
 246 static struct {
 247 #ifdef CONFIG_THINKPAD_ACPI_BAY
 248         u32 bay_status:1;
 249         u32 bay_eject:1;
 250         u32 bay_status2:1;
 251         u32 bay_eject2:1;
 252 #endif
 253         u32 bluetooth:1;
 254         u32 hotkey:1;
 255         u32 hotkey_mask:1;
 256         u32 hotkey_wlsw:1;
 257         u32 hotkey_tablet:1;
 258         u32 light:1;
 259         u32 light_status:1;
 260         u32 bright_16levels:1;
 261         u32 bright_acpimode:1;
 262         u32 wan:1;
 263         u32 fan_ctrl_status_undef:1;
 264         u32 input_device_registered:1;
 265         u32 platform_drv_registered:1;
 266         u32 platform_drv_attrs_registered:1;
 267         u32 sensors_pdrv_registered:1;
 268         u32 sensors_pdrv_attrs_registered:1;
 269         u32 sensors_pdev_attrs_registered:1;
 270         u32 hotkey_poll_active:1;
 271 } tp_features;
 272
 273 static struct {
 274         u16 hotkey_mask_ff:1;
 275         u16 bright_cmos_ec_unsync:1;
 276 } tp_warned;
 277
 278 struct thinkpad_id_data {
 279         unsigned int vendor;    /* ThinkPad vendor:
 280                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 281
 282         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 283         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 284
 285         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 286         u16 ec_model;
 287
 288         char *model_str;        /* ThinkPad T43 */
 289         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 290 };
 291 static struct thinkpad_id_data thinkpad_id;
 292
 293 static enum {
 294         TPACPI_LIFE_INIT = 0,
 295         TPACPI_LIFE_RUNNING,
 296         TPACPI_LIFE_EXITING,
 297 } tpacpi_lifecycle;
 298
 299 static int experimental;
 300 static u32 dbg_level;
 301
 302 static struct workqueue_struct *tpacpi_wq;
 303
 304 /* Special LED class that can defer work */
 305 struct tpacpi_led_classdev {
 306         struct led_classdev led_classdev;
 307         struct work_struct work;
 308         enum led_brightness new_brightness;
 309         unsigned int led;
 310 };
 311
 312 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 313 static int dbg_wlswemul;
 314 static int tpacpi_wlsw_emulstate;
 315 static int dbg_bluetoothemul;
 316 static int tpacpi_bluetooth_emulstate;
 317 static int dbg_wwanemul;
 318 static int tpacpi_wwan_emulstate;
 319 #endif
 320
 321
 322 /****************************************************************************
 323  ****************************************************************************
 324  *
 325  * ACPI Helpers and device model
 326  *
 327  ****************************************************************************
 328  ****************************************************************************/
 329
 330 /*************************************************************************
 331  * ACPI basic handles
 332  */
 333
 334 static acpi_handle root_handle;
 335
 336 #define TPACPI_HANDLE(object, parent, paths...)                 \
 337         static acpi_handle  object##_handle;                    \
 338         static acpi_handle *object##_parent = &parent##_handle; \
 339         static char        *object##_path;                      \
 340         static char        *object##_paths[] = { paths }
 341
 342 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 343            "\\_SB.PCI.ISA.EC",  /* 570 */
 344            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 345            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 346            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 347            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 348            "\\_SB.PCI0.LPC.EC", /* all others */
 349            );
 350
 351 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 352 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 353
 354 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 355                                         /* T4x, X31, X40 */
 356            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 357            "\\CMS",             /* R40, R40e */
 358            );                   /* all others */
 359
 360 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 361            "^HKEY",             /* R30, R31 */
 362            "HKEY",              /* all others */
 363            );                   /* 570 */
 364
 365 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 366            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 367            "\\_SB.PCI0.VID0",   /* 770e */
 368            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 369            "\\_SB.PCI0.AGP.VID",        /* all others */
 370            );                           /* R30, R31 */
 371
 372
 373 /*************************************************************************
 374  * ACPI helpers
 375  */
 376
 377 static int acpi_evalf(acpi_handle handle,
 378                       void *res, char *method, char *fmt, ...)
 379 {
 380         char *fmt0 = fmt;
 381         struct acpi_object_list params;
 382         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 383         struct acpi_buffer result, *resultp;
 384         union acpi_object out_obj;
 385         acpi_status status;
 386         va_list ap;
 387         char res_type;
 388         int success;
 389         int quiet;
 390
 391         if (!*fmt) {
 392                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 393                 return 0;
 394         }
 395
 396         if (*fmt == 'q') {
 397                 quiet = 1;
 398                 fmt++;
 399         } else
 400                 quiet = 0;
 401
 402         res_type = *(fmt++);
 403
 404         params.count = 0;
 405         params.pointer = &in_objs[0];
 406
 407         va_start(ap, fmt);
 408         while (*fmt) {
 409                 char c = *(fmt++);
 410                 switch (c) {
 411                 case 'd':       /* int */
 412                         in_objs[params.count].integer.value = va_arg(ap, int);
 413                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 414                         break;
 415                         /* add more types as needed */
 416                 default:
 417                         printk(TPACPI_ERR "acpi_evalf() called "
 418                                "with invalid format character '%c'\n", c);
 419                         return 0;
 420                 }
 421         }
 422         va_end(ap);
 423
 424         if (res_type != 'v') {
 425                 result.length = sizeof(out_obj);
 426                 result.pointer = &out_obj;
 427                 resultp = &result;
 428         } else
 429                 resultp = NULL;
 430
 431         status = acpi_evaluate_object(handle, method, &params, resultp);
 432
 433         switch (res_type) {
 434         case 'd':               /* int */
 435                 if (res)
 436                         *(int *)res = out_obj.integer.value;
 437                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 438                 break;
 439         case 'v':               /* void */
 440                 success = status == AE_OK;
 441                 break;
 442                 /* add more types as needed */
 443         default:
 444                 printk(TPACPI_ERR "acpi_evalf() called "
 445                        "with invalid format character '%c'\n", res_type);
 446                 return 0;
 447         }
 448
 449         if (!success && !quiet)
 450                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 451                        method, fmt0, status);
 452
 453         return success;
 454 }
 455
 456 static int acpi_ec_read(int i, u8 *p)
 457 {
 458         int v;
 459
 460         if (ecrd_handle) {
 461                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 462                         return 0;
 463                 *p = v;
 464         } else {
 465                 if (ec_read(i, p) < 0)
 466                         return 0;
 467         }
 468
 469         return 1;
 470 }
 471
 472 static int acpi_ec_write(int i, u8 v)
 473 {
 474         if (ecwr_handle) {
 475                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 476                         return 0;
 477         } else {
 478                 if (ec_write(i, v) < 0)
 479                         return 0;
 480         }
 481
 482         return 1;
 483 }
 484
 485 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 486 static int _sta(acpi_handle handle)
 487 {
 488         int status;
 489
 490         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 491                 status = 0;
 492
 493         return status;
 494 }
 495 #endif
 496
 497 static int issue_thinkpad_cmos_command(int cmos_cmd)
 498 {
 499         if (!cmos_handle)
 500                 return -ENXIO;
 501
 502         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 503                 return -EIO;
 504
 505         return 0;
 506 }
 507
 508 /*************************************************************************
 509  * ACPI device model
 510  */
 511
 512 #define TPACPI_ACPIHANDLE_INIT(object) \
 513         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 514                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 515
 516 static void drv_acpi_handle_init(char *name,
 517                            acpi_handle *handle, acpi_handle parent,
 518                            char **paths, int num_paths, char **path)
 519 {
 520         int i;
 521         acpi_status status;
 522
 523         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 524                 name);
 525
 526         for (i = 0; i < num_paths; i++) {
 527                 status = acpi_get_handle(parent, paths[i], handle);
 528                 if (ACPI_SUCCESS(status)) {
 529                         *path = paths[i];
 530                         dbg_printk(TPACPI_DBG_INIT,
 531                                    "Found ACPI handle %s for %s\n",
 532                                    *path, name);
 533                         return;
 534                 }
 535         }
 536
 537         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 538                     name);
 539         *handle = NULL;
 540 }
 541
 542 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 543 {
 544         struct ibm_struct *ibm = data;
 545
 546         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 547                 return;
 548
 549         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 550                 return;
 551
 552         ibm->acpi->notify(ibm, event);
 553 }
 554
 555 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 556 {
 557         acpi_status status;
 558         int rc;
 559
 560         BUG_ON(!ibm->acpi);
 561
 562         if (!*ibm->acpi->handle)
 563                 return 0;
 564
 565         vdbg_printk(TPACPI_DBG_INIT,
 566                 "setting up ACPI notify for %s\n", ibm->name);
 567
 568         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 569         if (rc < 0) {
 570                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 571                         ibm->name, rc);
 572                 return -ENODEV;
 573         }
 574
 575         ibm->acpi->device->driver_data = ibm;
 576         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 577                 TPACPI_ACPI_EVENT_PREFIX,
 578                 ibm->name);
 579
 580         status = acpi_install_notify_handler(*ibm->acpi->handle,
 581                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 582         if (ACPI_FAILURE(status)) {
 583                 if (status == AE_ALREADY_EXISTS) {
 584                         printk(TPACPI_NOTICE
 585                                "another device driver is already "
 586                                "handling %s events\n", ibm->name);
 587                 } else {
 588                         printk(TPACPI_ERR
 589                                "acpi_install_notify_handler(%s) failed: %d\n",
 590                                ibm->name, status);
 591                 }
 592                 return -ENODEV;
 593         }
 594         ibm->flags.acpi_notify_installed = 1;
 595         return 0;
 596 }
 597
 598 static int __init tpacpi_device_add(struct acpi_device *device)
 599 {
 600         return 0;
 601 }
 602
 603 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 604 {
 605         int rc;
 606
 607         dbg_printk(TPACPI_DBG_INIT,
 608                 "registering %s as an ACPI driver\n", ibm->name);
 609
 610         BUG_ON(!ibm->acpi);
 611
 612         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 613         if (!ibm->acpi->driver) {
 614                 printk(TPACPI_ERR
 615                        "failed to allocate memory for ibm->acpi->driver\n");
 616                 return -ENOMEM;
 617         }
 618
 619         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 620         ibm->acpi->driver->ids = ibm->acpi->hid;
 621
 622         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 623
 624         rc = acpi_bus_register_driver(ibm->acpi->driver);
 625         if (rc < 0) {
 626                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 627                        ibm->name, rc);
 628                 kfree(ibm->acpi->driver);
 629                 ibm->acpi->driver = NULL;
 630         } else if (!rc)
 631                 ibm->flags.acpi_driver_registered = 1;
 632
 633         return rc;
 634 }
 635
 636
 637 /****************************************************************************
 638  ****************************************************************************
 639  *
 640  * Procfs Helpers
 641  *
 642  ****************************************************************************
 643  ****************************************************************************/
 644
 645 static int dispatch_procfs_read(char *page, char **start, off_t off,
 646                         int count, int *eof, void *data)
 647 {
 648         struct ibm_struct *ibm = data;
 649         int len;
 650
 651         if (!ibm || !ibm->read)
 652                 return -EINVAL;
 653
 654         len = ibm->read(page);
 655         if (len < 0)
 656                 return len;
 657
 658         if (len <= off + count)
 659                 *eof = 1;
 660         *start = page + off;
 661         len -= off;
 662         if (len > count)
 663                 len = count;
 664         if (len < 0)
 665                 len = 0;
 666
 667         return len;
 668 }
 669
 670 static int dispatch_procfs_write(struct file *file,
 671                         const char __user *userbuf,
 672                         unsigned long count, void *data)
 673 {
 674         struct ibm_struct *ibm = data;
 675         char *kernbuf;
 676         int ret;
 677
 678         if (!ibm || !ibm->write)
 679                 return -EINVAL;
 680
 681         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 682         if (!kernbuf)
 683                 return -ENOMEM;
 684
 685         if (copy_from_user(kernbuf, userbuf, count)) {
 686                 kfree(kernbuf);
 687                 return -EFAULT;
 688         }
 689
 690         kernbuf[count] = 0;
 691         strcat(kernbuf, ",");
 692         ret = ibm->write(kernbuf);
 693         if (ret == 0)
 694                 ret = count;
 695
 696         kfree(kernbuf);
 697
 698         return ret;
 699 }
 700
 701 static char *next_cmd(char **cmds)
 702 {
 703         char *start = *cmds;
 704         char *end;
 705
 706         while ((end = strchr(start, ',')) && end == start)
 707                 start = end + 1;
 708
 709         if (!end)
 710                 return NULL;
 711
 712         *end = 0;
 713         *cmds = end + 1;
 714         return start;
 715 }
 716
 717
 718 /****************************************************************************
 719  ****************************************************************************
 720  *
 721  * Device model: input, hwmon and platform
 722  *
 723  ****************************************************************************
 724  ****************************************************************************/
 725
 726 static struct platform_device *tpacpi_pdev;
 727 static struct platform_device *tpacpi_sensors_pdev;
 728 static struct device *tpacpi_hwmon;
 729 static struct input_dev *tpacpi_inputdev;
 730 static struct mutex tpacpi_inputdev_send_mutex;
 731 static LIST_HEAD(tpacpi_all_drivers);
 732
 733 static int tpacpi_suspend_handler(struct platform_device *pdev,
 734                                   pm_message_t state)
 735 {
 736         struct ibm_struct *ibm, *itmp;
 737
 738         list_for_each_entry_safe(ibm, itmp,
 739                                  &tpacpi_all_drivers,
 740                                  all_drivers) {
 741                 if (ibm->suspend)
 742                         (ibm->suspend)(state);
 743         }
 744
 745         return 0;
 746 }
 747
 748 static int tpacpi_resume_handler(struct platform_device *pdev)
 749 {
 750         struct ibm_struct *ibm, *itmp;
 751
 752         list_for_each_entry_safe(ibm, itmp,
 753                                  &tpacpi_all_drivers,
 754                                  all_drivers) {
 755                 if (ibm->resume)
 756                         (ibm->resume)();
 757         }
 758
 759         return 0;
 760 }
 761
 762 static struct platform_driver tpacpi_pdriver = {
 763         .driver = {
 764                 .name = TPACPI_DRVR_NAME,
 765                 .owner = THIS_MODULE,
 766         },
 767         .suspend = tpacpi_suspend_handler,
 768         .resume = tpacpi_resume_handler,
 769 };
 770
 771 static struct platform_driver tpacpi_hwmon_pdriver = {
 772         .driver = {
 773                 .name = TPACPI_HWMON_DRVR_NAME,
 774                 .owner = THIS_MODULE,
 775         },
 776 };
 777
 778 /*************************************************************************
 779  * sysfs support helpers
 780  */
 781
 782 struct attribute_set {
 783         unsigned int members, max_members;
 784         struct attribute_group group;
 785 };
 786
 787 struct attribute_set_obj {
 788         struct attribute_set s;
 789         struct attribute *a;
 790 } __attribute__((packed));
 791
 792 static struct attribute_set *create_attr_set(unsigned int max_members,
 793                                                 const char *name)
 794 {
 795         struct attribute_set_obj *sobj;
 796
 797         if (max_members == 0)
 798                 return NULL;
 799
 800         /* Allocates space for implicit NULL at the end too */
 801         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 802                     max_members * sizeof(struct attribute *),
 803                     GFP_KERNEL);
 804         if (!sobj)
 805                 return NULL;
 806         sobj->s.max_members = max_members;
 807         sobj->s.group.attrs = &sobj->a;
 808         sobj->s.group.name = name;
 809
 810         return &sobj->s;
 811 }
 812
 813 #define destroy_attr_set(_set) \
 814         kfree(_set);
 815
 816 /* not multi-threaded safe, use it in a single thread per set */
 817 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 818 {
 819         if (!s || !attr)
 820                 return -EINVAL;
 821
 822         if (s->members >= s->max_members)
 823                 return -ENOMEM;
 824
 825         s->group.attrs[s->members] = attr;
 826         s->members++;
 827
 828         return 0;
 829 }
 830
 831 static int add_many_to_attr_set(struct attribute_set *s,
 832                         struct attribute **attr,
 833                         unsigned int count)
 834 {
 835         int i, res;
 836
 837         for (i = 0; i < count; i++) {
 838                 res = add_to_attr_set(s, attr[i]);
 839                 if (res)
 840                         return res;
 841         }
 842
 843         return 0;
 844 }
 845
 846 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 847 {
 848         sysfs_remove_group(kobj, &s->group);
 849         destroy_attr_set(s);
 850 }
 851
 852 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 853         sysfs_create_group(_kobj, &_attr_set->group)
 854
 855 static int parse_strtoul(const char *buf,
 856                 unsigned long max, unsigned long *value)
 857 {
 858         char *endp;
 859
 860         while (*buf && isspace(*buf))
 861                 buf++;
 862         *value = simple_strtoul(buf, &endp, 0);
 863         while (*endp && isspace(*endp))
 864                 endp++;
 865         if (*endp || *value > max)
 866                 return -EINVAL;
 867
 868         return 0;
 869 }
 870
 871 static void tpacpi_disable_brightness_delay(void)
 872 {
 873         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
 874                 printk(TPACPI_NOTICE
 875                         "ACPI backlight control delay disabled\n");
 876 }
 877
 878 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 879 {
 880         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 881         union acpi_object *obj;
 882         int rc;
 883
 884         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 885                 obj = (union acpi_object *)buffer.pointer;
 886                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 887                         printk(TPACPI_ERR "Unknown _BCL data, "
 888                                "please report this to %s\n", TPACPI_MAIL);
 889                         rc = 0;
 890                 } else {
 891                         rc = obj->package.count;
 892                 }
 893         } else {
 894                 return 0;
 895         }
 896
 897         kfree(buffer.pointer);
 898         return rc;
 899 }
 900
 901 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 902                                         u32 lvl, void *context, void **rv)
 903 {
 904         char name[ACPI_PATH_SEGMENT_LENGTH];
 905         struct acpi_buffer buffer = { sizeof(name), &name };
 906
 907         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 908             !strncmp("_BCL", name, sizeof(name) - 1)) {
 909                 BUG_ON(!rv || !*rv);
 910                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 911                 return AE_CTRL_TERMINATE;
 912         } else {
 913                 return AE_OK;
 914         }
 915 }
 916
 917 /*
 918  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 919  */
 920 static int __init tpacpi_check_std_acpi_brightness_support(void)
 921 {
 922         int status;
 923         int bcl_levels = 0;
 924         void *bcl_ptr = &bcl_levels;
 925
 926         if (!vid_handle) {
 927                 TPACPI_ACPIHANDLE_INIT(vid);
 928         }
 929         if (!vid_handle)
 930                 return 0;
 931
 932         /*
 933          * Search for a _BCL method, and execute it.  This is safe on all
 934          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 935          * BIOS in ACPI backlight control mode.  We do NOT have to care
 936          * about calling the _BCL method in an enabled video device, any
 937          * will do for our purposes.
 938          */
 939
 940         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 941                                      tpacpi_acpi_walk_find_bcl, NULL,
 942                                      &bcl_ptr);
 943
 944         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 945                 tp_features.bright_acpimode = 1;
 946                 return (bcl_levels - 2);
 947         }
 948
 949         return 0;
 950 }
 951
 952 static int __init tpacpi_new_rfkill(const unsigned int id,
 953                         struct rfkill **rfk,
 954                         const enum rfkill_type rfktype,
 955                         const char *name,
 956                         int (*toggle_radio)(void *, enum rfkill_state),
 957                         int (*get_state)(void *, enum rfkill_state *))
 958 {
 959         int res;
 960         enum rfkill_state initial_state;
 961
 962         *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
 963         if (!*rfk) {
 964                 printk(TPACPI_ERR
 965                         "failed to allocate memory for rfkill class\n");
 966                 return -ENOMEM;
 967         }
 968
 969         (*rfk)->name = name;
 970         (*rfk)->get_state = get_state;
 971         (*rfk)->toggle_radio = toggle_radio;
 972
 973         if (!get_state(NULL, &initial_state))
 974                 (*rfk)->state = initial_state;
 975
 976         res = rfkill_register(*rfk);
 977         if (res < 0) {
 978                 printk(TPACPI_ERR
 979                         "failed to register %s rfkill switch: %d\n",
 980                         name, res);
 981                 rfkill_free(*rfk);
 982                 *rfk = NULL;
 983                 return res;
 984         }
 985
 986         return 0;
 987 }
 988
 989 /*************************************************************************
 990  * thinkpad-acpi driver attributes
 991  */
 992
 993 /* interface_version --------------------------------------------------- */
 994 static ssize_t tpacpi_driver_interface_version_show(
 995                                 struct device_driver *drv,
 996                                 char *buf)
 997 {
 998         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 999 }
1000
1001 static DRIVER_ATTR(interface_version, S_IRUGO,
1002                 tpacpi_driver_interface_version_show, NULL);
1003
1004 /* debug_level --------------------------------------------------------- */
1005 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1006                                                 char *buf)
1007 {
1008         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1009 }
1010
1011 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1012                                                 const char *buf, size_t count)
1013 {
1014         unsigned long t;
1015
1016         if (parse_strtoul(buf, 0xffff, &t))
1017                 return -EINVAL;
1018
1019         dbg_level = t;
1020
1021         return count;
1022 }
1023
1024 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1025                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1026
1027 /* version ------------------------------------------------------------- */
1028 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1029                                                 char *buf)
1030 {
1031         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1032                         TPACPI_DESC, TPACPI_VERSION);
1033 }
1034
1035 static DRIVER_ATTR(version, S_IRUGO,
1036                 tpacpi_driver_version_show, NULL);
1037
1038 /* --------------------------------------------------------------------- */
1039
1040 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1041
1042 static void tpacpi_send_radiosw_update(void);
1043
1044 /* wlsw_emulstate ------------------------------------------------------ */
1045 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1046                                                 char *buf)
1047 {
1048         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1049 }
1050
1051 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1052                                                 const char *buf, size_t count)
1053 {
1054         unsigned long t;
1055
1056         if (parse_strtoul(buf, 1, &t))
1057                 return -EINVAL;
1058
1059         if (tpacpi_wlsw_emulstate != t) {
1060                 tpacpi_wlsw_emulstate = !!t;
1061                 tpacpi_send_radiosw_update();
1062         } else
1063                 tpacpi_wlsw_emulstate = !!t;
1064
1065         return count;
1066 }
1067
1068 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1069                 tpacpi_driver_wlsw_emulstate_show,
1070                 tpacpi_driver_wlsw_emulstate_store);
1071
1072 /* bluetooth_emulstate ------------------------------------------------- */
1073 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1074                                         struct device_driver *drv,
1075                                         char *buf)
1076 {
1077         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1078 }
1079
1080 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1081                                         struct device_driver *drv,
1082                                         const char *buf, size_t count)
1083 {
1084         unsigned long t;
1085
1086         if (parse_strtoul(buf, 1, &t))
1087                 return -EINVAL;
1088
1089         tpacpi_bluetooth_emulstate = !!t;
1090
1091         return count;
1092 }
1093
1094 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1095                 tpacpi_driver_bluetooth_emulstate_show,
1096                 tpacpi_driver_bluetooth_emulstate_store);
1097
1098 /* wwan_emulstate ------------------------------------------------- */
1099 static ssize_t tpacpi_driver_wwan_emulstate_show(
1100                                         struct device_driver *drv,
1101                                         char *buf)
1102 {
1103         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1104 }
1105
1106 static ssize_t tpacpi_driver_wwan_emulstate_store(
1107                                         struct device_driver *drv,
1108                                         const char *buf, size_t count)
1109 {
1110         unsigned long t;
1111
1112         if (parse_strtoul(buf, 1, &t))
1113                 return -EINVAL;
1114
1115         tpacpi_wwan_emulstate = !!t;
1116
1117         return count;
1118 }
1119
1120 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1121                 tpacpi_driver_wwan_emulstate_show,
1122                 tpacpi_driver_wwan_emulstate_store);
1123
1124 #endif
1125
1126 /* --------------------------------------------------------------------- */
1127
1128 static struct driver_attribute *tpacpi_driver_attributes[] = {
1129         &driver_attr_debug_level, &driver_attr_version,
1130         &driver_attr_interface_version,
1131 };
1132
1133 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1134 {
1135         int i, res;
1136
1137         i = 0;
1138         res = 0;
1139         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1140                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1141                 i++;
1142         }
1143
1144 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1145         if (!res && dbg_wlswemul)
1146                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1147         if (!res && dbg_bluetoothemul)
1148                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1149         if (!res && dbg_wwanemul)
1150                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1151 #endif
1152
1153         return res;
1154 }
1155
1156 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1157 {
1158         int i;
1159
1160         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1161                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1162
1163 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1164         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1165         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1166         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1167 #endif
1168 }
1169
1170 /****************************************************************************
1171  ****************************************************************************
1172  *
1173  * Subdrivers
1174  *
1175  ****************************************************************************
1176  ****************************************************************************/
1177
1178 /*************************************************************************
1179  * thinkpad-acpi init subdriver
1180  */
1181
1182 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1183 {
1184         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1185         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1186
1187         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1188                 (thinkpad_id.bios_version_str) ?
1189                         thinkpad_id.bios_version_str : "unknown",
1190                 (thinkpad_id.ec_version_str) ?
1191                         thinkpad_id.ec_version_str : "unknown");
1192
1193         if (thinkpad_id.vendor && thinkpad_id.model_str)
1194                 printk(TPACPI_INFO "%s %s, model %s\n",
1195                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1196                                 "IBM" : ((thinkpad_id.vendor ==
1197                                                 PCI_VENDOR_ID_LENOVO) ?
1198                                         "Lenovo" : "Unknown vendor"),
1199                         thinkpad_id.model_str,
1200                         (thinkpad_id.nummodel_str) ?
1201                                 thinkpad_id.nummodel_str : "unknown");
1202
1203         return 0;
1204 }
1205
1206 static int thinkpad_acpi_driver_read(char *p)
1207 {
1208         int len = 0;
1209
1210         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1211         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1212
1213         return len;
1214 }
1215
1216 static struct ibm_struct thinkpad_acpi_driver_data = {
1217         .name = "driver",
1218         .read = thinkpad_acpi_driver_read,
1219 };
1220
1221 /*************************************************************************
1222  * Hotkey subdriver
1223  */
1224
1225 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1226         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1227         TP_ACPI_HOTKEYSCAN_FNF2,
1228         TP_ACPI_HOTKEYSCAN_FNF3,
1229         TP_ACPI_HOTKEYSCAN_FNF4,
1230         TP_ACPI_HOTKEYSCAN_FNF5,
1231         TP_ACPI_HOTKEYSCAN_FNF6,
1232         TP_ACPI_HOTKEYSCAN_FNF7,
1233         TP_ACPI_HOTKEYSCAN_FNF8,
1234         TP_ACPI_HOTKEYSCAN_FNF9,
1235         TP_ACPI_HOTKEYSCAN_FNF10,
1236         TP_ACPI_HOTKEYSCAN_FNF11,
1237         TP_ACPI_HOTKEYSCAN_FNF12,
1238         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1239         TP_ACPI_HOTKEYSCAN_FNINSERT,
1240         TP_ACPI_HOTKEYSCAN_FNDELETE,
1241         TP_ACPI_HOTKEYSCAN_FNHOME,
1242         TP_ACPI_HOTKEYSCAN_FNEND,
1243         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1244         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1245         TP_ACPI_HOTKEYSCAN_FNSPACE,
1246         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1247         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1248         TP_ACPI_HOTKEYSCAN_MUTE,
1249         TP_ACPI_HOTKEYSCAN_THINKPAD,
1250 };
1251
1252 enum {  /* Keys available through NVRAM polling */
1253         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1254         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1255 };
1256
1257 enum {  /* Positions of some of the keys in hotkey masks */
1258         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1259         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1260         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1261         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1262         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1263         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1264         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1265         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1266         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1267         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1268         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1269 };
1270
1271 enum {  /* NVRAM to ACPI HKEY group map */
1272         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1273                                           TP_ACPI_HKEY_ZOOM_MASK |
1274                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1275                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1276         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1277                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1278         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1279                                           TP_ACPI_HKEY_VOLDWN_MASK |
1280                                           TP_ACPI_HKEY_MUTE_MASK,
1281 };
1282
1283 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1284 struct tp_nvram_state {
1285        u16 thinkpad_toggle:1;
1286        u16 zoom_toggle:1;
1287        u16 display_toggle:1;
1288        u16 thinklight_toggle:1;
1289        u16 hibernate_toggle:1;
1290        u16 displayexp_toggle:1;
1291        u16 display_state:1;
1292        u16 brightness_toggle:1;
1293        u16 volume_toggle:1;
1294        u16 mute:1;
1295
1296        u8 brightness_level;
1297        u8 volume_level;
1298 };
1299
1300 static struct task_struct *tpacpi_hotkey_task;
1301 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1302 static int hotkey_poll_freq = 10;       /* Hz */
1303 static struct mutex hotkey_thread_mutex;
1304 static struct mutex hotkey_thread_data_mutex;
1305 static unsigned int hotkey_config_change;
1306
1307 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1308
1309 #define hotkey_source_mask 0U
1310
1311 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1312
1313 static struct mutex hotkey_mutex;
1314
1315 static enum {   /* Reasons for waking up */
1316         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1317         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1318         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1319 } hotkey_wakeup_reason;
1320
1321 static int hotkey_autosleep_ack;
1322
1323 static int hotkey_orig_status;
1324 static u32 hotkey_orig_mask;
1325 static u32 hotkey_all_mask;
1326 static u32 hotkey_reserved_mask;
1327 static u32 hotkey_mask;
1328
1329 static unsigned int hotkey_report_mode;
1330
1331 static u16 *hotkey_keycode_map;
1332
1333 static struct attribute_set *hotkey_dev_attributes;
1334
1335 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1336 #define HOTKEY_CONFIG_CRITICAL_START \
1337         do { \
1338                 mutex_lock(&hotkey_thread_data_mutex); \
1339                 hotkey_config_change++; \
1340         } while (0);
1341 #define HOTKEY_CONFIG_CRITICAL_END \
1342         mutex_unlock(&hotkey_thread_data_mutex);
1343 #else
1344 #define HOTKEY_CONFIG_CRITICAL_START
1345 #define HOTKEY_CONFIG_CRITICAL_END
1346 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1347
1348 /* HKEY.MHKG() return bits */
1349 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1350
1351 static int hotkey_get_wlsw(int *status)
1352 {
1353 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1354         if (dbg_wlswemul) {
1355                 *status = !!tpacpi_wlsw_emulstate;
1356                 return 0;
1357         }
1358 #endif
1359         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1360                 return -EIO;
1361         return 0;
1362 }
1363
1364 static int hotkey_get_tablet_mode(int *status)
1365 {
1366         int s;
1367
1368         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1369                 return -EIO;
1370
1371         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1372         return 0;
1373 }
1374
1375 /*
1376  * Call with hotkey_mutex held
1377  */
1378 static int hotkey_mask_get(void)
1379 {
1380         u32 m = 0;
1381
1382         if (tp_features.hotkey_mask) {
1383                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1384                         return -EIO;
1385         }
1386         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1387
1388         return 0;
1389 }
1390
1391 /*
1392  * Call with hotkey_mutex held
1393  */
1394 static int hotkey_mask_set(u32 mask)
1395 {
1396         int i;
1397         int rc = 0;
1398
1399         if (tp_features.hotkey_mask) {
1400                 if (!tp_warned.hotkey_mask_ff &&
1401                     (mask == 0xffff || mask == 0xffffff ||
1402                      mask == 0xffffffff)) {
1403                         tp_warned.hotkey_mask_ff = 1;
1404                         printk(TPACPI_NOTICE
1405                                "setting the hotkey mask to 0x%08x is likely "
1406                                "not the best way to go about it\n", mask);
1407                         printk(TPACPI_NOTICE
1408                                "please consider using the driver defaults, "
1409                                "and refer to up-to-date thinkpad-acpi "
1410                                "documentation\n");
1411                 }
1412
1413                 HOTKEY_CONFIG_CRITICAL_START
1414                 for (i = 0; i < 32; i++) {
1415                         u32 m = 1 << i;
1416                         /* enable in firmware mask only keys not in NVRAM
1417                          * mode, but enable the key in the cached hotkey_mask
1418                          * regardless of mode, or the key will end up
1419                          * disabled by hotkey_mask_get() */
1420                         if (!acpi_evalf(hkey_handle,
1421                                         NULL, "MHKM", "vdd", i + 1,
1422                                         !!((mask & ~hotkey_source_mask) & m))) {
1423                                 rc = -EIO;
1424                                 break;
1425                         } else {
1426                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1427                         }
1428                 }
1429                 HOTKEY_CONFIG_CRITICAL_END
1430
1431                 /* hotkey_mask_get must be called unconditionally below */
1432                 if (!hotkey_mask_get() && !rc &&
1433                     (hotkey_mask & ~hotkey_source_mask) !=
1434                      (mask & ~hotkey_source_mask)) {
1435                         printk(TPACPI_NOTICE
1436                                "requested hot key mask 0x%08x, but "
1437                                "firmware forced it to 0x%08x\n",
1438                                mask, hotkey_mask);
1439                 }
1440         } else {
1441 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1442                 HOTKEY_CONFIG_CRITICAL_START
1443                 hotkey_mask = mask & hotkey_source_mask;
1444                 HOTKEY_CONFIG_CRITICAL_END
1445                 hotkey_mask_get();
1446                 if (hotkey_mask != mask) {
1447                         printk(TPACPI_NOTICE
1448                                "requested hot key mask 0x%08x, "
1449                                "forced to 0x%08x (NVRAM poll mask is "
1450                                "0x%08x): no firmware mask support\n",
1451                                mask, hotkey_mask, hotkey_source_mask);
1452                 }
1453 #else
1454                 hotkey_mask_get();
1455                 rc = -ENXIO;
1456 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1457         }
1458
1459         return rc;
1460 }
1461
1462 static int hotkey_status_get(int *status)
1463 {
1464         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1465                 return -EIO;
1466
1467         return 0;
1468 }
1469
1470 static int hotkey_status_set(int status)
1471 {
1472         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1473                 return -EIO;
1474
1475         return 0;
1476 }
1477
1478 static void tpacpi_input_send_tabletsw(void)
1479 {
1480         int state;
1481
1482         if (tp_features.hotkey_tablet &&
1483             !hotkey_get_tablet_mode(&state)) {
1484                 mutex_lock(&tpacpi_inputdev_send_mutex);
1485
1486                 input_report_switch(tpacpi_inputdev,
1487                                     SW_TABLET_MODE, !!state);
1488                 input_sync(tpacpi_inputdev);
1489
1490                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1491         }
1492 }
1493
1494 static void tpacpi_input_send_key(unsigned int scancode)
1495 {
1496         unsigned int keycode;
1497
1498         keycode = hotkey_keycode_map[scancode];
1499
1500         if (keycode != KEY_RESERVED) {
1501                 mutex_lock(&tpacpi_inputdev_send_mutex);
1502
1503                 input_report_key(tpacpi_inputdev, keycode, 1);
1504                 if (keycode == KEY_UNKNOWN)
1505                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1506                                     scancode);
1507                 input_sync(tpacpi_inputdev);
1508
1509                 input_report_key(tpacpi_inputdev, keycode, 0);
1510                 if (keycode == KEY_UNKNOWN)
1511                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1512                                     scancode);
1513                 input_sync(tpacpi_inputdev);
1514
1515                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1516         }
1517 }
1518
1519 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1520 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1521
1522 static void tpacpi_hotkey_send_key(unsigned int scancode)
1523 {
1524         tpacpi_input_send_key(scancode);
1525         if (hotkey_report_mode < 2) {
1526                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1527                                                 0x80, 0x1001 + scancode);
1528         }
1529 }
1530
1531 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1532 {
1533         u8 d;
1534
1535         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1536                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1537                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1538                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1539                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1540                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1541         }
1542         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1543                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1544                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1545         }
1546         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1547                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1548                 n->displayexp_toggle =
1549                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1550         }
1551         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1552                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1553                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1554                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1555                 n->brightness_toggle =
1556                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1557         }
1558         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1559                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1560                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1561                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1562                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1563                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1564         }
1565 }
1566
1567 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1568         do { \
1569                 if ((mask & (1 << __scancode)) && \
1570                     oldn->__member != newn->__member) \
1571                 tpacpi_hotkey_send_key(__scancode); \
1572         } while (0)
1573
1574 #define TPACPI_MAY_SEND_KEY(__scancode) \
1575         do { if (mask & (1 << __scancode)) \
1576                 tpacpi_hotkey_send_key(__scancode); } while (0)
1577
1578 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1579                                            struct tp_nvram_state *newn,
1580                                            u32 mask)
1581 {
1582         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1583         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1584         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1585         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1586
1587         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1588
1589         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1590
1591         /* handle volume */
1592         if (oldn->volume_toggle != newn->volume_toggle) {
1593                 if (oldn->mute != newn->mute) {
1594                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1595                 }
1596                 if (oldn->volume_level > newn->volume_level) {
1597                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1598                 } else if (oldn->volume_level < newn->volume_level) {
1599                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1600                 } else if (oldn->mute == newn->mute) {
1601                         /* repeated key presses that didn't change state */
1602                         if (newn->mute) {
1603                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1604                         } else if (newn->volume_level != 0) {
1605                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1606                         } else {
1607                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1608                         }
1609                 }
1610         }
1611
1612         /* handle brightness */
1613         if (oldn->brightness_toggle != newn->brightness_toggle) {
1614                 if (oldn->brightness_level < newn->brightness_level) {
1615                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1616                 } else if (oldn->brightness_level > newn->brightness_level) {
1617                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1618                 } else {
1619                         /* repeated key presses that didn't change state */
1620                         if (newn->brightness_level != 0) {
1621                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1622                         } else {
1623                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1624                         }
1625                 }
1626         }
1627 }
1628
1629 #undef TPACPI_COMPARE_KEY
1630 #undef TPACPI_MAY_SEND_KEY
1631
1632 static int hotkey_kthread(void *data)
1633 {
1634         struct tp_nvram_state s[2];
1635         u32 mask;
1636         unsigned int si, so;
1637         unsigned long t;
1638         unsigned int change_detector, must_reset;
1639
1640         mutex_lock(&hotkey_thread_mutex);
1641
1642         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1643                 goto exit;
1644
1645         set_freezable();
1646
1647         so = 0;
1648         si = 1;
1649         t = 0;
1650
1651         /* Initial state for compares */
1652         mutex_lock(&hotkey_thread_data_mutex);
1653         change_detector = hotkey_config_change;
1654         mask = hotkey_source_mask & hotkey_mask;
1655         mutex_unlock(&hotkey_thread_data_mutex);
1656         hotkey_read_nvram(&s[so], mask);
1657
1658         while (!kthread_should_stop() && hotkey_poll_freq) {
1659                 if (t == 0)
1660                         t = 1000/hotkey_poll_freq;
1661                 t = msleep_interruptible(t);
1662                 if (unlikely(kthread_should_stop()))
1663                         break;
1664                 must_reset = try_to_freeze();
1665                 if (t > 0 && !must_reset)
1666                         continue;
1667
1668                 mutex_lock(&hotkey_thread_data_mutex);
1669                 if (must_reset || hotkey_config_change != change_detector) {
1670                         /* forget old state on thaw or config change */
1671                         si = so;
1672                         t = 0;
1673                         change_detector = hotkey_config_change;
1674                 }
1675                 mask = hotkey_source_mask & hotkey_mask;
1676                 mutex_unlock(&hotkey_thread_data_mutex);
1677
1678                 if (likely(mask)) {
1679                         hotkey_read_nvram(&s[si], mask);
1680                         if (likely(si != so)) {
1681                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1682                                                                 mask);
1683                         }
1684                 }
1685
1686                 so = si;
1687                 si ^= 1;
1688         }
1689
1690 exit:
1691         mutex_unlock(&hotkey_thread_mutex);
1692         return 0;
1693 }
1694
1695 static void hotkey_poll_stop_sync(void)
1696 {
1697         if (tpacpi_hotkey_task) {
1698                 if (frozen(tpacpi_hotkey_task) ||
1699                     freezing(tpacpi_hotkey_task))
1700                         thaw_process(tpacpi_hotkey_task);
1701
1702                 kthread_stop(tpacpi_hotkey_task);
1703                 tpacpi_hotkey_task = NULL;
1704                 mutex_lock(&hotkey_thread_mutex);
1705                 /* at this point, the thread did exit */
1706                 mutex_unlock(&hotkey_thread_mutex);
1707         }
1708 }
1709
1710 /* call with hotkey_mutex held */
1711 static void hotkey_poll_setup(int may_warn)
1712 {
1713         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1714             hotkey_poll_freq > 0 &&
1715             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1716                 if (!tpacpi_hotkey_task) {
1717                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1718                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1719                         if (IS_ERR(tpacpi_hotkey_task)) {
1720                                 tpacpi_hotkey_task = NULL;
1721                                 printk(TPACPI_ERR
1722                                        "could not create kernel thread "
1723                                        "for hotkey polling\n");
1724                         }
1725                 }
1726         } else {
1727                 hotkey_poll_stop_sync();
1728                 if (may_warn &&
1729                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1730                         printk(TPACPI_NOTICE
1731                                 "hot keys 0x%08x require polling, "
1732                                 "which is currently disabled\n",
1733                                 hotkey_source_mask);
1734                 }
1735         }
1736 }
1737
1738 static void hotkey_poll_setup_safe(int may_warn)
1739 {
1740         mutex_lock(&hotkey_mutex);
1741         hotkey_poll_setup(may_warn);
1742         mutex_unlock(&hotkey_mutex);
1743 }
1744
1745 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1746
1747 static void hotkey_poll_setup_safe(int __unused)
1748 {
1749 }
1750
1751 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1752
1753 static int hotkey_inputdev_open(struct input_dev *dev)
1754 {
1755         switch (tpacpi_lifecycle) {
1756         case TPACPI_LIFE_INIT:
1757                 /*
1758                  * hotkey_init will call hotkey_poll_setup_safe
1759                  * at the appropriate moment
1760                  */
1761                 return 0;
1762         case TPACPI_LIFE_EXITING:
1763                 return -EBUSY;
1764         case TPACPI_LIFE_RUNNING:
1765                 hotkey_poll_setup_safe(0);
1766                 return 0;
1767         }
1768
1769         /* Should only happen if tpacpi_lifecycle is corrupt */
1770         BUG();
1771         return -EBUSY;
1772 }
1773
1774 static void hotkey_inputdev_close(struct input_dev *dev)
1775 {
1776         /* disable hotkey polling when possible */
1777         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1778                 hotkey_poll_setup_safe(0);
1779 }
1780
1781 /* sysfs hotkey enable ------------------------------------------------- */
1782 static ssize_t hotkey_enable_show(struct device *dev,
1783                            struct device_attribute *attr,
1784                            char *buf)
1785 {
1786         int res, status;
1787
1788         res = hotkey_status_get(&status);
1789         if (res)
1790                 return res;
1791
1792         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1793 }
1794
1795 static ssize_t hotkey_enable_store(struct device *dev,
1796                             struct device_attribute *attr,
1797                             const char *buf, size_t count)
1798 {
1799         unsigned long t;
1800         int res;
1801
1802         if (parse_strtoul(buf, 1, &t))
1803                 return -EINVAL;
1804
1805         res = hotkey_status_set(t);
1806
1807         return (res) ? res : count;
1808 }
1809
1810 static struct device_attribute dev_attr_hotkey_enable =
1811         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1812                 hotkey_enable_show, hotkey_enable_store);
1813
1814 /* sysfs hotkey mask --------------------------------------------------- */
1815 static ssize_t hotkey_mask_show(struct device *dev,
1816                            struct device_attribute *attr,
1817                            char *buf)
1818 {
1819         int res;
1820
1821         if (mutex_lock_interruptible(&hotkey_mutex))
1822                 return -ERESTARTSYS;
1823         res = hotkey_mask_get();
1824         mutex_unlock(&hotkey_mutex);
1825
1826         return (res)?
1827                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1828 }
1829
1830 static ssize_t hotkey_mask_store(struct device *dev,
1831                             struct device_attribute *attr,
1832                             const char *buf, size_t count)
1833 {
1834         unsigned long t;
1835         int res;
1836
1837         if (parse_strtoul(buf, 0xffffffffUL, &t))
1838                 return -EINVAL;
1839
1840         if (mutex_lock_interruptible(&hotkey_mutex))
1841                 return -ERESTARTSYS;
1842
1843         res = hotkey_mask_set(t);
1844
1845 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1846         hotkey_poll_setup(1);
1847 #endif
1848
1849         mutex_unlock(&hotkey_mutex);
1850
1851         return (res) ? res : count;
1852 }
1853
1854 static struct device_attribute dev_attr_hotkey_mask =
1855         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1856                 hotkey_mask_show, hotkey_mask_store);
1857
1858 /* sysfs hotkey bios_enabled ------------------------------------------- */
1859 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1860                            struct device_attribute *attr,
1861                            char *buf)
1862 {
1863         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1864 }
1865
1866 static struct device_attribute dev_attr_hotkey_bios_enabled =
1867         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1868
1869 /* sysfs hotkey bios_mask ---------------------------------------------- */
1870 static ssize_t hotkey_bios_mask_show(struct device *dev,
1871                            struct device_attribute *attr,
1872                            char *buf)
1873 {
1874         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1875 }
1876
1877 static struct device_attribute dev_attr_hotkey_bios_mask =
1878         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1879
1880 /* sysfs hotkey all_mask ----------------------------------------------- */
1881 static ssize_t hotkey_all_mask_show(struct device *dev,
1882                            struct device_attribute *attr,
1883                            char *buf)
1884 {
1885         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1886                                 hotkey_all_mask | hotkey_source_mask);
1887 }
1888
1889 static struct device_attribute dev_attr_hotkey_all_mask =
1890         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1891
1892 /* sysfs hotkey recommended_mask --------------------------------------- */
1893 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1894                                             struct device_attribute *attr,
1895                                             char *buf)
1896 {
1897         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1898                         (hotkey_all_mask | hotkey_source_mask)
1899                         & ~hotkey_reserved_mask);
1900 }
1901
1902 static struct device_attribute dev_attr_hotkey_recommended_mask =
1903         __ATTR(hotkey_recommended_mask, S_IRUGO,
1904                 hotkey_recommended_mask_show, NULL);
1905
1906 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1907
1908 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1909 static ssize_t hotkey_source_mask_show(struct device *dev,
1910                            struct device_attribute *attr,
1911                            char *buf)
1912 {
1913         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1914 }
1915
1916 static ssize_t hotkey_source_mask_store(struct device *dev,
1917                             struct device_attribute *attr,
1918                             const char *buf, size_t count)
1919 {
1920         unsigned long t;
1921
1922         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1923                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1924                 return -EINVAL;
1925
1926         if (mutex_lock_interruptible(&hotkey_mutex))
1927                 return -ERESTARTSYS;
1928
1929         HOTKEY_CONFIG_CRITICAL_START
1930         hotkey_source_mask = t;
1931         HOTKEY_CONFIG_CRITICAL_END
1932
1933         hotkey_poll_setup(1);
1934
1935         mutex_unlock(&hotkey_mutex);
1936
1937         return count;
1938 }
1939
1940 static struct device_attribute dev_attr_hotkey_source_mask =
1941         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1942                 hotkey_source_mask_show, hotkey_source_mask_store);
1943
1944 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1945 static ssize_t hotkey_poll_freq_show(struct device *dev,
1946                            struct device_attribute *attr,
1947                            char *buf)
1948 {
1949         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1950 }
1951
1952 static ssize_t hotkey_poll_freq_store(struct device *dev,
1953                             struct device_attribute *attr,
1954                             const char *buf, size_t count)
1955 {
1956         unsigned long t;
1957
1958         if (parse_strtoul(buf, 25, &t))
1959                 return -EINVAL;
1960
1961         if (mutex_lock_interruptible(&hotkey_mutex))
1962                 return -ERESTARTSYS;
1963
1964         hotkey_poll_freq = t;
1965
1966         hotkey_poll_setup(1);
1967         mutex_unlock(&hotkey_mutex);
1968
1969         return count;
1970 }
1971
1972 static struct device_attribute dev_attr_hotkey_poll_freq =
1973         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1974                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1975
1976 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1977
1978 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1979 static ssize_t hotkey_radio_sw_show(struct device *dev,
1980                            struct device_attribute *attr,
1981                            char *buf)
1982 {
1983         int res, s;
1984         res = hotkey_get_wlsw(&s);
1985         if (res < 0)
1986                 return res;
1987
1988         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1989 }
1990
1991 static struct device_attribute dev_attr_hotkey_radio_sw =
1992         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1993
1994 static void hotkey_radio_sw_notify_change(void)
1995 {
1996         if (tp_features.hotkey_wlsw)
1997                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1998                              "hotkey_radio_sw");
1999 }
2000
2001 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2002 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2003                            struct device_attribute *attr,
2004                            char *buf)
2005 {
2006         int res, s;
2007         res = hotkey_get_tablet_mode(&s);
2008         if (res < 0)
2009                 return res;
2010
2011         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2012 }
2013
2014 static struct device_attribute dev_attr_hotkey_tablet_mode =
2015         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2016
2017 static void hotkey_tablet_mode_notify_change(void)
2018 {
2019         if (tp_features.hotkey_tablet)
2020                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2021                              "hotkey_tablet_mode");
2022 }
2023
2024 /* sysfs hotkey report_mode -------------------------------------------- */
2025 static ssize_t hotkey_report_mode_show(struct device *dev,
2026                            struct device_attribute *attr,
2027                            char *buf)
2028 {
2029         return snprintf(buf, PAGE_SIZE, "%d\n",
2030                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2031 }
2032
2033 static struct device_attribute dev_attr_hotkey_report_mode =
2034         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2035
2036 /* sysfs wakeup reason (pollable) -------------------------------------- */
2037 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2038                            struct device_attribute *attr,
2039                            char *buf)
2040 {
2041         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2042 }
2043
2044 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2045         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2046
2047 static void hotkey_wakeup_reason_notify_change(void)
2048 {
2049         if (tp_features.hotkey_mask)
2050                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2051                              "wakeup_reason");
2052 }
2053
2054 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2055 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2056                            struct device_attribute *attr,
2057                            char *buf)
2058 {
2059         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2060 }
2061
2062 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2063         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2064                hotkey_wakeup_hotunplug_complete_show, NULL);
2065
2066 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2067 {
2068         if (tp_features.hotkey_mask)
2069                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2070                              "wakeup_hotunplug_complete");
2071 }
2072
2073 /* --------------------------------------------------------------------- */
2074
2075 static struct attribute *hotkey_attributes[] __initdata = {
2076         &dev_attr_hotkey_enable.attr,
2077         &dev_attr_hotkey_bios_enabled.attr,
2078         &dev_attr_hotkey_report_mode.attr,
2079 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2080         &dev_attr_hotkey_mask.attr,
2081         &dev_attr_hotkey_all_mask.attr,
2082         &dev_attr_hotkey_recommended_mask.attr,
2083         &dev_attr_hotkey_source_mask.attr,
2084         &dev_attr_hotkey_poll_freq.attr,
2085 #endif
2086 };
2087
2088 static struct attribute *hotkey_mask_attributes[] __initdata = {
2089         &dev_attr_hotkey_bios_mask.attr,
2090 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2091         &dev_attr_hotkey_mask.attr,
2092         &dev_attr_hotkey_all_mask.attr,
2093         &dev_attr_hotkey_recommended_mask.attr,
2094 #endif
2095         &dev_attr_hotkey_wakeup_reason.attr,
2096         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2097 };
2098
2099 static void bluetooth_update_rfk(void);
2100 static void wan_update_rfk(void);
2101 static void tpacpi_send_radiosw_update(void)
2102 {
2103         int wlsw;
2104
2105         /* Sync these BEFORE sending any rfkill events */
2106         if (tp_features.bluetooth)
2107                 bluetooth_update_rfk();
2108         if (tp_features.wan)
2109                 wan_update_rfk();
2110
2111         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2112                 mutex_lock(&tpacpi_inputdev_send_mutex);
2113
2114                 input_report_switch(tpacpi_inputdev,
2115                                     SW_RFKILL_ALL, !!wlsw);
2116                 input_sync(tpacpi_inputdev);
2117
2118                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2119         }
2120         hotkey_radio_sw_notify_change();
2121 }
2122
2123 static void hotkey_exit(void)
2124 {
2125 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2126         hotkey_poll_stop_sync();
2127 #endif
2128
2129         if (hotkey_dev_attributes)
2130                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2131
2132         kfree(hotkey_keycode_map);
2133
2134         if (tp_features.hotkey) {
2135                 dbg_printk(TPACPI_DBG_EXIT,
2136                            "restoring original hot key mask\n");
2137                 /* no short-circuit boolean operator below! */
2138                 if ((hotkey_mask_set(hotkey_orig_mask) |
2139                      hotkey_status_set(hotkey_orig_status)) != 0)
2140                         printk(TPACPI_ERR
2141                                "failed to restore hot key mask "
2142                                "to BIOS defaults\n");
2143         }
2144 }
2145
2146 static int __init hotkey_init(struct ibm_init_struct *iibm)
2147 {
2148         /* Requirements for changing the default keymaps:
2149          *
2150          * 1. Many of the keys are mapped to KEY_RESERVED for very
2151          *    good reasons.  Do not change them unless you have deep
2152          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2153          *    the various ThinkPad models.  The driver behaves
2154          *    differently for KEY_RESERVED: such keys have their
2155          *    hot key mask *unset* in mask_recommended, and also
2156          *    in the initial hot key mask programmed into the
2157          *    firmware at driver load time, which means the firm-
2158          *    ware may react very differently if you change them to
2159          *    something else;
2160          *
2161          * 2. You must be subscribed to the linux-thinkpad and
2162          *    ibm-acpi-devel mailing lists, and you should read the
2163          *    list archives since 2007 if you want to change the
2164          *    keymaps.  This requirement exists so that you will
2165          *    know the past history of problems with the thinkpad-
2166          *    acpi driver keymaps, and also that you will be
2167          *    listening to any bug reports;
2168          *
2169          * 3. Do not send thinkpad-acpi specific patches directly to
2170          *    for merging, *ever*.  Send them to the linux-acpi
2171          *    mailinglist for comments.  Merging is to be done only
2172          *    through acpi-test and the ACPI maintainer.
2173          *
2174          * If the above is too much to ask, don't change the keymap.
2175          * Ask the thinkpad-acpi maintainer to do it, instead.
2176          */
2177         static u16 ibm_keycode_map[] __initdata = {
2178                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2179                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2180                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2181                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2182
2183                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2184                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2185                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2186                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2187
2188                 /* brightness: firmware always reacts to them, unless
2189                  * X.org did some tricks in the radeon BIOS scratch
2190                  * registers of *some* models */
2191                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2192                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2193
2194                 /* Thinklight: firmware always react to it */
2195                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2196
2197                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2198                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2199
2200                 /* Volume: firmware always react to it and reprograms
2201                  * the built-in *extra* mixer.  Never map it to control
2202                  * another mixer by default. */
2203                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2204                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2205                 KEY_RESERVED,   /* 0x16: MUTE */
2206
2207                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2208
2209                 /* (assignments unknown, please report if found) */
2210                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2211                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2212         };
2213         static u16 lenovo_keycode_map[] __initdata = {
2214                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2215                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2216                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2217                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2218
2219                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2220                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2221                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2222                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2223
2224                 /* These either have to go through ACPI video, or
2225                  * act like in the IBM ThinkPads, so don't ever
2226                  * enable them by default */
2227                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2228                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2229
2230                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2231
2232                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2233                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2234
2235                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2236                  * react to it and reprograms the built-in *extra* mixer.
2237                  * Never map it to control another mixer by default.
2238                  *
2239                  * T60?, T61, R60?, R61: firmware and EC tries to send
2240                  * these over the regular keyboard, so these are no-ops,
2241                  * but there are still weird bugs re. MUTE, so do not
2242                  * change unless you get test reports from all Lenovo
2243                  * models.  May cause the BIOS to interfere with the
2244                  * HDA mixer.
2245                  */
2246                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2247                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2248                 KEY_RESERVED,   /* 0x16: MUTE */
2249
2250                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2251
2252                 /* (assignments unknown, please report if found) */
2253                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2254                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2255         };
2256
2257 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2258 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2259 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2260
2261         int res, i;
2262         int status;
2263         int hkeyv;
2264
2265         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2266
2267         BUG_ON(!tpacpi_inputdev);
2268         BUG_ON(tpacpi_inputdev->open != NULL ||
2269                tpacpi_inputdev->close != NULL);
2270
2271         TPACPI_ACPIHANDLE_INIT(hkey);
2272         mutex_init(&hotkey_mutex);
2273
2274 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2275         mutex_init(&hotkey_thread_mutex);
2276         mutex_init(&hotkey_thread_data_mutex);
2277 #endif
2278
2279         /* hotkey not supported on 570 */
2280         tp_features.hotkey = hkey_handle != NULL;
2281
2282         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2283                 str_supported(tp_features.hotkey));
2284
2285         if (!tp_features.hotkey)
2286                 return 1;
2287
2288         tpacpi_disable_brightness_delay();
2289
2290         hotkey_dev_attributes = create_attr_set(13, NULL);
2291         if (!hotkey_dev_attributes)
2292                 return -ENOMEM;
2293         res = add_many_to_attr_set(hotkey_dev_attributes,
2294                         hotkey_attributes,
2295                         ARRAY_SIZE(hotkey_attributes));
2296         if (res)
2297                 goto err_exit;
2298
2299         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2300            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2301            for HKEY interface version 0x100 */
2302         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2303                 if ((hkeyv >> 8) != 1) {
2304                         printk(TPACPI_ERR "unknown version of the "
2305                                "HKEY interface: 0x%x\n", hkeyv);
2306                         printk(TPACPI_ERR "please report this to %s\n",
2307                                TPACPI_MAIL);
2308                 } else {
2309                         /*
2310                          * MHKV 0x100 in A31, R40, R40e,
2311                          * T4x, X31, and later
2312                          */
2313                         tp_features.hotkey_mask = 1;
2314                 }
2315         }
2316
2317         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2318                 str_supported(tp_features.hotkey_mask));
2319
2320         if (tp_features.hotkey_mask) {
2321                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2322                                 "MHKA", "qd")) {
2323                         printk(TPACPI_ERR
2324                                "missing MHKA handler, "
2325                                "please report this to %s\n",
2326                                TPACPI_MAIL);
2327                         /* FN+F12, FN+F4, FN+F3 */
2328                         hotkey_all_mask = 0x080cU;
2329                 }
2330         }
2331
2332         /* hotkey_source_mask *must* be zero for
2333          * the first hotkey_mask_get */
2334         res = hotkey_status_get(&hotkey_orig_status);
2335         if (res)
2336                 goto err_exit;
2337
2338         if (tp_features.hotkey_mask) {
2339                 res = hotkey_mask_get();
2340                 if (res)
2341                         goto err_exit;
2342
2343                 hotkey_orig_mask = hotkey_mask;
2344                 res = add_many_to_attr_set(
2345                                 hotkey_dev_attributes,
2346                                 hotkey_mask_attributes,
2347                                 ARRAY_SIZE(hotkey_mask_attributes));
2348                 if (res)
2349                         goto err_exit;
2350         }
2351
2352 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2353         if (tp_features.hotkey_mask) {
2354                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2355                                         & ~hotkey_all_mask;
2356         } else {
2357                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2358         }
2359
2360         vdbg_printk(TPACPI_DBG_INIT,
2361                     "hotkey source mask 0x%08x, polling freq %d\n",
2362                     hotkey_source_mask, hotkey_poll_freq);
2363 #endif
2364
2365 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2366         if (dbg_wlswemul) {
2367                 tp_features.hotkey_wlsw = 1;
2368                 printk(TPACPI_INFO
2369                         "radio switch emulation enabled\n");
2370         } else
2371 #endif
2372         /* Not all thinkpads have a hardware radio switch */
2373         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2374                 tp_features.hotkey_wlsw = 1;
2375                 printk(TPACPI_INFO
2376                         "radio switch found; radios are %s\n",
2377                         enabled(status, 0));
2378         }
2379         if (tp_features.hotkey_wlsw)
2380                 res = add_to_attr_set(hotkey_dev_attributes,
2381                                 &dev_attr_hotkey_radio_sw.attr);
2382
2383         /* For X41t, X60t, X61t Tablets... */
2384         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2385                 tp_features.hotkey_tablet = 1;
2386                 printk(TPACPI_INFO
2387                         "possible tablet mode switch found; "
2388                         "ThinkPad in %s mode\n",
2389                         (status & TP_HOTKEY_TABLET_MASK)?
2390                                 "tablet" : "laptop");
2391                 res = add_to_attr_set(hotkey_dev_attributes,
2392                                 &dev_attr_hotkey_tablet_mode.attr);
2393         }
2394
2395         if (!res)
2396                 res = register_attr_set_with_sysfs(
2397                                 hotkey_dev_attributes,
2398                                 &tpacpi_pdev->dev.kobj);
2399         if (res)
2400                 goto err_exit;
2401
2402         /* Set up key map */
2403
2404         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2405                                         GFP_KERNEL);
2406         if (!hotkey_keycode_map) {
2407                 printk(TPACPI_ERR
2408                         "failed to allocate memory for key map\n");
2409                 res = -ENOMEM;
2410                 goto err_exit;
2411         }
2412
2413         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2414                 dbg_printk(TPACPI_DBG_INIT,
2415                            "using Lenovo default hot key map\n");
2416                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2417                         TPACPI_HOTKEY_MAP_SIZE);
2418         } else {
2419                 dbg_printk(TPACPI_DBG_INIT,
2420                            "using IBM default hot key map\n");
2421                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2422                         TPACPI_HOTKEY_MAP_SIZE);
2423         }
2424
2425         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2426         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2427         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2428         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2429         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2430         tpacpi_inputdev->keycode = hotkey_keycode_map;
2431         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2432                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2433                         set_bit(hotkey_keycode_map[i],
2434                                 tpacpi_inputdev->keybit);
2435                 } else {
2436                         if (i < sizeof(hotkey_reserved_mask)*8)
2437                                 hotkey_reserved_mask |= 1 << i;
2438                 }
2439         }
2440
2441         if (tp_features.hotkey_wlsw) {
2442                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2443                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2444         }
2445         if (tp_features.hotkey_tablet) {
2446                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2447                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2448         }
2449
2450         /* Do not issue duplicate brightness change events to
2451          * userspace */
2452         if (!tp_features.bright_acpimode)
2453                 /* update bright_acpimode... */
2454                 tpacpi_check_std_acpi_brightness_support();
2455
2456         if (tp_features.bright_acpimode) {
2457                 printk(TPACPI_INFO
2458                        "This ThinkPad has standard ACPI backlight "
2459                        "brightness control, supported by the ACPI "
2460                        "video driver\n");
2461                 printk(TPACPI_NOTICE
2462                        "Disabling thinkpad-acpi brightness events "
2463                        "by default...\n");
2464
2465                 /* The hotkey_reserved_mask change below is not
2466                  * necessary while the keys are at KEY_RESERVED in the
2467                  * default map, but better safe than sorry, leave it
2468                  * here as a marker of what we have to do, especially
2469                  * when we finally become able to set this at runtime
2470                  * on response to X.org requests */
2471                 hotkey_reserved_mask |=
2472                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2473                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2474         }
2475
2476         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2477         res = hotkey_status_set(1);
2478         if (res) {
2479                 hotkey_exit();
2480                 return res;
2481         }
2482         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2483                                 & ~hotkey_reserved_mask)
2484                                 | hotkey_orig_mask);
2485         if (res < 0 && res != -ENXIO) {
2486                 hotkey_exit();
2487                 return res;
2488         }
2489
2490         dbg_printk(TPACPI_DBG_INIT,
2491                         "legacy hot key reporting over procfs %s\n",
2492                         (hotkey_report_mode < 2) ?
2493                                 "enabled" : "disabled");
2494
2495         tpacpi_inputdev->open = &hotkey_inputdev_open;
2496         tpacpi_inputdev->close = &hotkey_inputdev_close;
2497
2498         hotkey_poll_setup_safe(1);
2499         tpacpi_send_radiosw_update();
2500         tpacpi_input_send_tabletsw();
2501
2502         return 0;
2503
2504 err_exit:
2505         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2506         hotkey_dev_attributes = NULL;
2507
2508         return (res < 0)? res : 1;
2509 }
2510
2511 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2512 {
2513         u32 hkey;
2514         unsigned int scancode;
2515         int send_acpi_ev;
2516         int ignore_acpi_ev;
2517         int unk_ev;
2518
2519         if (event != 0x80) {
2520                 printk(TPACPI_ERR
2521                        "unknown HKEY notification event %d\n", event);
2522                 /* forward it to userspace, maybe it knows how to handle it */
2523                 acpi_bus_generate_netlink_event(
2524                                         ibm->acpi->device->pnp.device_class,
2525                                         dev_name(&ibm->acpi->device->dev),
2526                                         event, 0);
2527                 return;
2528         }
2529
2530         while (1) {
2531                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2532                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2533                         return;
2534                 }
2535
2536                 if (hkey == 0) {
2537                         /* queue empty */
2538                         return;
2539                 }
2540
2541                 send_acpi_ev = 1;
2542                 ignore_acpi_ev = 0;
2543                 unk_ev = 0;
2544
2545                 switch (hkey >> 12) {
2546                 case 1:
2547                         /* 0x1000-0x1FFF: key presses */
2548                         scancode = hkey & 0xfff;
2549                         if (scancode > 0 && scancode < 0x21) {
2550                                 scancode--;
2551                                 if (!(hotkey_source_mask & (1 << scancode))) {
2552                                         tpacpi_input_send_key(scancode);
2553                                         send_acpi_ev = 0;
2554                                 } else {
2555                                         ignore_acpi_ev = 1;
2556                                 }
2557                         } else {
2558                                 unk_ev = 1;
2559                         }
2560                         break;
2561                 case 2:
2562                         /* Wakeup reason */
2563                         switch (hkey) {
2564                         case 0x2304: /* suspend, undock */
2565                         case 0x2404: /* hibernation, undock */
2566                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2567                                 ignore_acpi_ev = 1;
2568                                 break;
2569                         case 0x2305: /* suspend, bay eject */
2570                         case 0x2405: /* hibernation, bay eject */
2571                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2572                                 ignore_acpi_ev = 1;
2573                                 break;
2574                         default:
2575                                 unk_ev = 1;
2576                         }
2577                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2578                                 printk(TPACPI_INFO
2579                                        "woke up due to a hot-unplug "
2580                                        "request...\n");
2581                                 hotkey_wakeup_reason_notify_change();
2582                         }
2583                         break;
2584                 case 3:
2585                         /* bay-related wakeups */
2586                         if (hkey == 0x3003) {
2587                                 hotkey_autosleep_ack = 1;
2588                                 printk(TPACPI_INFO
2589                                        "bay ejected\n");
2590                                 hotkey_wakeup_hotunplug_complete_notify_change();
2591                         } else {
2592                                 unk_ev = 1;
2593                         }
2594                         break;
2595                 case 4:
2596                         /* dock-related wakeups */
2597                         if (hkey == 0x4003) {
2598                                 hotkey_autosleep_ack = 1;
2599                                 printk(TPACPI_INFO
2600                                        "undocked\n");
2601                                 hotkey_wakeup_hotunplug_complete_notify_change();
2602                         } else {
2603                                 unk_ev = 1;
2604                         }
2605                         break;
2606                 case 5:
2607                         /* 0x5000-0x5FFF: human interface helpers */
2608                         switch (hkey) {
2609                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2610                         case 0x500b: /* X61t: tablet pen inserted into bay */
2611                         case 0x500c: /* X61t: tablet pen removed from bay */
2612                                 break;
2613                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2614                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2615                                 tpacpi_input_send_tabletsw();
2616                                 hotkey_tablet_mode_notify_change();
2617                                 send_acpi_ev = 0;
2618                                 break;
2619                         case 0x5001:
2620                         case 0x5002:
2621                                 /* LID switch events.  Do not propagate */
2622                                 ignore_acpi_ev = 1;
2623                                 break;
2624                         default:
2625                                 unk_ev = 1;
2626                         }
2627                         break;
2628                 case 7:
2629                         /* 0x7000-0x7FFF: misc */
2630                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2631                                 tpacpi_send_radiosw_update();
2632                                 send_acpi_ev = 0;
2633                                 break;
2634                         }
2635                         /* fallthrough to default */
2636                 default:
2637                         unk_ev = 1;
2638                 }
2639                 if (unk_ev) {
2640                         printk(TPACPI_NOTICE
2641                                "unhandled HKEY event 0x%04x\n", hkey);
2642                 }
2643
2644                 /* Legacy events */
2645                 if (!ignore_acpi_ev &&
2646                     (send_acpi_ev || hotkey_report_mode < 2)) {
2647                         acpi_bus_generate_proc_event(ibm->acpi->device,
2648                                                      event, hkey);
2649                 }
2650
2651                 /* netlink events */
2652                 if (!ignore_acpi_ev && send_acpi_ev) {
2653                         acpi_bus_generate_netlink_event(
2654                                         ibm->acpi->device->pnp.device_class,
2655                                         dev_name(&ibm->acpi->device->dev),
2656                                         event, hkey);
2657                 }
2658         }
2659 }
2660
2661 static void hotkey_suspend(pm_message_t state)
2662 {
2663         /* Do these on suspend, we get the events on early resume! */
2664         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2665         hotkey_autosleep_ack = 0;
2666 }
2667
2668 static void hotkey_resume(void)
2669 {
2670         tpacpi_disable_brightness_delay();
2671
2672         if (hotkey_mask_get())
2673                 printk(TPACPI_ERR
2674                        "error while trying to read hot key mask "
2675                        "from firmware\n");
2676         tpacpi_send_radiosw_update();
2677         hotkey_tablet_mode_notify_change();
2678         hotkey_wakeup_reason_notify_change();
2679         hotkey_wakeup_hotunplug_complete_notify_change();
2680         hotkey_poll_setup_safe(0);
2681 }
2682
2683 /* procfs -------------------------------------------------------------- */
2684 static int hotkey_read(char *p)
2685 {
2686         int res, status;
2687         int len = 0;
2688
2689         if (!tp_features.hotkey) {
2690                 len += sprintf(p + len, "status:\t\tnot supported\n");
2691                 return len;
2692         }
2693
2694         if (mutex_lock_interruptible(&hotkey_mutex))
2695                 return -ERESTARTSYS;
2696         res = hotkey_status_get(&status);
2697         if (!res)
2698                 res = hotkey_mask_get();
2699         mutex_unlock(&hotkey_mutex);
2700         if (res)
2701                 return res;
2702
2703         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2704         if (tp_features.hotkey_mask) {
2705                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2706                 len += sprintf(p + len,
2707                                "commands:\tenable, disable, reset, <mask>\n");
2708         } else {
2709                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2710                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2711         }
2712
2713         return len;
2714 }
2715
2716 static int hotkey_write(char *buf)
2717 {
2718         int res, status;
2719         u32 mask;
2720         char *cmd;
2721
2722         if (!tp_features.hotkey)
2723                 return -ENODEV;
2724
2725         if (mutex_lock_interruptible(&hotkey_mutex))
2726                 return -ERESTARTSYS;
2727
2728         status = -1;
2729         mask = hotkey_mask;
2730
2731         res = 0;
2732         while ((cmd = next_cmd(&buf))) {
2733                 if (strlencmp(cmd, "enable") == 0) {
2734                         status = 1;
2735                 } else if (strlencmp(cmd, "disable") == 0) {
2736                         status = 0;
2737                 } else if (strlencmp(cmd, "reset") == 0) {
2738                         status = hotkey_orig_status;
2739                         mask = hotkey_orig_mask;
2740                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2741                         /* mask set */
2742                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2743                         /* mask set */
2744                 } else {
2745                         res = -EINVAL;
2746                         goto errexit;
2747                 }
2748         }
2749         if (status != -1)
2750                 res = hotkey_status_set(status);
2751
2752         if (!res && mask != hotkey_mask)
2753                 res = hotkey_mask_set(mask);
2754
2755 errexit:
2756         mutex_unlock(&hotkey_mutex);
2757         return res;
2758 }
2759
2760 static const struct acpi_device_id ibm_htk_device_ids[] = {
2761         {TPACPI_ACPI_HKEY_HID, 0},
2762         {"", 0},
2763 };
2764
2765 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2766         .hid = ibm_htk_device_ids,
2767         .notify = hotkey_notify,
2768         .handle = &hkey_handle,
2769         .type = ACPI_DEVICE_NOTIFY,
2770 };
2771
2772 static struct ibm_struct hotkey_driver_data = {
2773         .name = "hotkey",
2774         .read = hotkey_read,
2775         .write = hotkey_write,
2776         .exit = hotkey_exit,
2777         .resume = hotkey_resume,
2778         .suspend = hotkey_suspend,
2779         .acpi = &ibm_hotkey_acpidriver,
2780 };
2781
2782 /*************************************************************************
2783  * Bluetooth subdriver
2784  */
2785
2786 enum {
2787         /* ACPI GBDC/SBDC bits */
2788         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2789         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2790         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
2791                                                    off / last state */
2792 };
2793
2794 enum {
2795         /* ACPI \BLTH commands */
2796         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
2797         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
2798         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
2799         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
2800         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
2801 };
2802
2803 static struct rfkill *tpacpi_bluetooth_rfkill;
2804
2805 static void bluetooth_suspend(pm_message_t state)
2806 {
2807         /* Try to make sure radio will resume powered off */
2808         acpi_evalf(NULL, NULL, "\\BLTH", "vd",
2809                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
2810 }
2811
2812 static int bluetooth_get_radiosw(void)
2813 {
2814         int status;
2815
2816         if (!tp_features.bluetooth)
2817                 return -ENODEV;
2818
2819         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2820         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2821                 return RFKILL_STATE_HARD_BLOCKED;
2822
2823 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2824         if (dbg_bluetoothemul)
2825                 return (tpacpi_bluetooth_emulstate) ?
2826                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2827 #endif
2828
2829         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2830                 return -EIO;
2831
2832         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
2833                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
2834 }
2835
2836 static void bluetooth_update_rfk(void)
2837 {
2838         int status;
2839
2840         if (!tpacpi_bluetooth_rfkill)
2841                 return;
2842
2843         status = bluetooth_get_radiosw();
2844         if (status < 0)
2845                 return;
2846         rfkill_force_state(tpacpi_bluetooth_rfkill, status);
2847 }
2848
2849 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
2850 {
2851         int status;
2852
2853         if (!tp_features.bluetooth)
2854                 return -ENODEV;
2855
2856         /* WLSW overrides bluetooth in firmware/hardware, but there is no
2857          * reason to risk weird behaviour. */
2858         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2859             && radio_on)
2860                 return -EPERM;
2861
2862 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2863         if (dbg_bluetoothemul) {
2864                 tpacpi_bluetooth_emulstate = !!radio_on;
2865                 if (update_rfk)
2866                         bluetooth_update_rfk();
2867                 return 0;
2868         }
2869 #endif
2870
2871         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
2872         if (radio_on)
2873                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
2874         else
2875                 status = 0;
2876         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2877                 return -EIO;
2878
2879         if (update_rfk)
2880                 bluetooth_update_rfk();
2881
2882         return 0;
2883 }
2884
2885 /* sysfs bluetooth enable ---------------------------------------------- */
2886 static ssize_t bluetooth_enable_show(struct device *dev,
2887                            struct device_attribute *attr,
2888                            char *buf)
2889 {
2890         int status;
2891
2892         status = bluetooth_get_radiosw();
2893         if (status < 0)
2894                 return status;
2895
2896         return snprintf(buf, PAGE_SIZE, "%d\n",
2897                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
2898 }
2899
2900 static ssize_t bluetooth_enable_store(struct device *dev,
2901                             struct device_attribute *attr,
2902                             const char *buf, size_t count)
2903 {
2904         unsigned long t;
2905         int res;
2906
2907         if (parse_strtoul(buf, 1, &t))
2908                 return -EINVAL;
2909
2910         res = bluetooth_set_radiosw(t, 1);
2911
2912         return (res) ? res : count;
2913 }
2914
2915 static struct device_attribute dev_attr_bluetooth_enable =
2916         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2917                 bluetooth_enable_show, bluetooth_enable_store);
2918
2919 /* --------------------------------------------------------------------- */
2920
2921 static struct attribute *bluetooth_attributes[] = {
2922         &dev_attr_bluetooth_enable.attr,
2923         NULL
2924 };
2925
2926 static const struct attribute_group bluetooth_attr_group = {
2927         .attrs = bluetooth_attributes,
2928 };
2929
2930 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
2931 {
2932         int bts = bluetooth_get_radiosw();
2933
2934         if (bts < 0)
2935                 return bts;
2936
2937         *state = bts;
2938         return 0;
2939 }
2940
2941 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
2942 {
2943         return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
2944 }
2945
2946 static void bluetooth_exit(void)
2947 {
2948         if (tpacpi_bluetooth_rfkill)
2949                 rfkill_unregister(tpacpi_bluetooth_rfkill);
2950
2951         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2952                         &bluetooth_attr_group);
2953 }
2954
2955 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2956 {
2957         int res;
2958         int status = 0;
2959
2960         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2961
2962         TPACPI_ACPIHANDLE_INIT(hkey);
2963
2964         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2965            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2966         tp_features.bluetooth = hkey_handle &&
2967             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2968
2969         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2970                 str_supported(tp_features.bluetooth),
2971                 status);
2972
2973 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2974         if (dbg_bluetoothemul) {
2975                 tp_features.bluetooth = 1;
2976                 printk(TPACPI_INFO
2977                         "bluetooth switch emulation enabled\n");
2978         } else
2979 #endif
2980         if (tp_features.bluetooth &&
2981             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2982                 /* no bluetooth hardware present in system */
2983                 tp_features.bluetooth = 0;
2984                 dbg_printk(TPACPI_DBG_INIT,
2985                            "bluetooth hardware not installed\n");
2986         }
2987
2988         if (!tp_features.bluetooth)
2989                 return 1;
2990
2991         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2992                                 &bluetooth_attr_group);
2993         if (res)
2994                 return res;
2995
2996         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
2997                                 &tpacpi_bluetooth_rfkill,
2998                                 RFKILL_TYPE_BLUETOOTH,
2999                                 "tpacpi_bluetooth_sw",
3000                                 tpacpi_bluetooth_rfk_set,
3001                                 tpacpi_bluetooth_rfk_get);
3002         if (res) {
3003                 bluetooth_exit();
3004                 return res;
3005         }
3006
3007         return 0;
3008 }
3009
3010 /* procfs -------------------------------------------------------------- */
3011 static int bluetooth_read(char *p)
3012 {
3013         int len = 0;
3014         int status = bluetooth_get_radiosw();
3015
3016         if (!tp_features.bluetooth)
3017                 len += sprintf(p + len, "status:\t\tnot supported\n");
3018         else {
3019                 len += sprintf(p + len, "status:\t\t%s\n",
3020                                 (status == RFKILL_STATE_UNBLOCKED) ?
3021                                         "enabled" : "disabled");
3022                 len += sprintf(p + len, "commands:\tenable, disable\n");
3023         }
3024
3025         return len;
3026 }
3027
3028 static int bluetooth_write(char *buf)
3029 {
3030         char *cmd;
3031
3032         if (!tp_features.bluetooth)
3033                 return -ENODEV;
3034
3035         while ((cmd = next_cmd(&buf))) {
3036                 if (strlencmp(cmd, "enable") == 0) {
3037                         bluetooth_set_radiosw(1, 1);
3038                 } else if (strlencmp(cmd, "disable") == 0) {
3039                         bluetooth_set_radiosw(0, 1);
3040                 } else
3041                         return -EINVAL;
3042         }
3043
3044         return 0;
3045 }
3046
3047 static struct ibm_struct bluetooth_driver_data = {
3048         .name = "bluetooth",
3049         .read = bluetooth_read,
3050         .write = bluetooth_write,
3051         .exit = bluetooth_exit,
3052         .suspend = bluetooth_suspend,
3053 };
3054
3055 /*************************************************************************
3056  * Wan subdriver
3057  */
3058
3059 enum {
3060         /* ACPI GWAN/SWAN bits */
3061         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3062         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3063         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3064                                                    off / last state */
3065 };
3066
3067 static struct rfkill *tpacpi_wan_rfkill;
3068
3069 static void wan_suspend(pm_message_t state)
3070 {
3071         /* Try to make sure radio will resume powered off */
3072         acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3073                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3074 }
3075
3076 static int wan_get_radiosw(void)
3077 {
3078         int status;
3079
3080         if (!tp_features.wan)
3081                 return -ENODEV;
3082
3083         /* WLSW overrides WWAN in firmware/hardware, reflect that */
3084         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3085                 return RFKILL_STATE_HARD_BLOCKED;
3086
3087 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3088         if (dbg_wwanemul)
3089                 return (tpacpi_wwan_emulstate) ?
3090                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3091 #endif
3092
3093         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3094                 return -EIO;
3095
3096         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3097                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3098 }
3099
3100 static void wan_update_rfk(void)
3101 {
3102         int status;
3103
3104         if (!tpacpi_wan_rfkill)
3105                 return;
3106
3107         status = wan_get_radiosw();
3108         if (status < 0)
3109                 return;
3110         rfkill_force_state(tpacpi_wan_rfkill, status);
3111 }
3112
3113 static int wan_set_radiosw(int radio_on, int update_rfk)
3114 {
3115         int status;
3116
3117         if (!tp_features.wan)
3118                 return -ENODEV;
3119
3120         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3121          * reason to risk weird behaviour. */
3122         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3123             && radio_on)
3124                 return -EPERM;
3125
3126 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3127         if (dbg_wwanemul) {
3128                 tpacpi_wwan_emulstate = !!radio_on;
3129                 if (update_rfk)
3130                         wan_update_rfk();
3131                 return 0;
3132         }
3133 #endif
3134
3135         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3136         if (radio_on)
3137                 status = TP_ACPI_WANCARD_RADIOSSW;
3138         else
3139                 status = 0;
3140         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3141                 return -EIO;
3142
3143         if (update_rfk)
3144                 wan_update_rfk();
3145
3146         return 0;
3147 }
3148
3149 /* sysfs wan enable ---------------------------------------------------- */
3150 static ssize_t wan_enable_show(struct device *dev,
3151                            struct device_attribute *attr,
3152                            char *buf)
3153 {
3154         int status;
3155
3156         status = wan_get_radiosw();
3157         if (status < 0)
3158                 return status;
3159
3160         return snprintf(buf, PAGE_SIZE, "%d\n",
3161                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3162 }
3163
3164 static ssize_t wan_enable_store(struct device *dev,
3165                             struct device_attribute *attr,
3166                             const char *buf, size_t count)
3167 {
3168         unsigned long t;
3169         int res;
3170
3171         if (parse_strtoul(buf, 1, &t))
3172                 return -EINVAL;
3173
3174         res = wan_set_radiosw(t, 1);
3175
3176         return (res) ? res : count;
3177 }
3178
3179 static struct device_attribute dev_attr_wan_enable =
3180         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3181                 wan_enable_show, wan_enable_store);
3182
3183 /* --------------------------------------------------------------------- */
3184
3185 static struct attribute *wan_attributes[] = {
3186         &dev_attr_wan_enable.attr,
3187         NULL
3188 };
3189
3190 static const struct attribute_group wan_attr_group = {
3191         .attrs = wan_attributes,
3192 };
3193
3194 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3195 {
3196         int wans = wan_get_radiosw();
3197
3198         if (wans < 0)
3199                 return wans;
3200
3201         *state = wans;
3202         return 0;
3203 }
3204
3205 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3206 {
3207         return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3208 }
3209
3210 static void wan_exit(void)
3211 {
3212         if (tpacpi_wan_rfkill)
3213                 rfkill_unregister(tpacpi_wan_rfkill);
3214
3215         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3216                 &wan_attr_group);
3217 }
3218
3219 static int __init wan_init(struct ibm_init_struct *iibm)
3220 {
3221         int res;
3222         int status = 0;
3223
3224         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3225
3226         TPACPI_ACPIHANDLE_INIT(hkey);
3227
3228         tp_features.wan = hkey_handle &&
3229             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3230
3231         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3232                 str_supported(tp_features.wan),
3233                 status);
3234
3235 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3236         if (dbg_wwanemul) {
3237                 tp_features.wan = 1;
3238                 printk(TPACPI_INFO
3239                         "wwan switch emulation enabled\n");
3240         } else
3241 #endif
3242         if (tp_features.wan &&
3243             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3244                 /* no wan hardware present in system */
3245                 tp_features.wan = 0;
3246                 dbg_printk(TPACPI_DBG_INIT,
3247                            "wan hardware not installed\n");
3248         }
3249
3250         if (!tp_features.wan)
3251                 return 1;
3252
3253         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3254                                 &wan_attr_group);
3255         if (res)
3256                 return res;
3257
3258         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3259                                 &tpacpi_wan_rfkill,
3260                                 RFKILL_TYPE_WWAN,
3261                                 "tpacpi_wwan_sw",
3262                                 tpacpi_wan_rfk_set,
3263                                 tpacpi_wan_rfk_get);
3264         if (res) {
3265                 wan_exit();
3266                 return res;
3267         }
3268
3269         return 0;
3270 }
3271
3272 /* procfs -------------------------------------------------------------- */
3273 static int wan_read(char *p)
3274 {
3275         int len = 0;
3276         int status = wan_get_radiosw();
3277
3278         if (!tp_features.wan)
3279                 len += sprintf(p + len, "status:\t\tnot supported\n");
3280         else {
3281                 len += sprintf(p + len, "status:\t\t%s\n",
3282                                 (status == RFKILL_STATE_UNBLOCKED) ?
3283                                         "enabled" : "disabled");
3284                 len += sprintf(p + len, "commands:\tenable, disable\n");
3285         }
3286
3287         return len;
3288 }
3289
3290 static int wan_write(char *buf)
3291 {
3292         char *cmd;
3293
3294         if (!tp_features.wan)
3295                 return -ENODEV;
3296
3297         while ((cmd = next_cmd(&buf))) {
3298                 if (strlencmp(cmd, "enable") == 0) {
3299                         wan_set_radiosw(1, 1);
3300                 } else if (strlencmp(cmd, "disable") == 0) {
3301                         wan_set_radiosw(0, 1);
3302                 } else
3303                         return -EINVAL;
3304         }
3305
3306         return 0;
3307 }
3308
3309 static struct ibm_struct wan_driver_data = {
3310         .name = "wan",
3311         .read = wan_read,
3312         .write = wan_write,
3313         .exit = wan_exit,
3314         .suspend = wan_suspend,
3315 };
3316
3317 /*************************************************************************
3318  * Video subdriver
3319  */
3320
3321 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3322
3323 enum video_access_mode {
3324         TPACPI_VIDEO_NONE = 0,
3325         TPACPI_VIDEO_570,       /* 570 */
3326         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3327         TPACPI_VIDEO_NEW,       /* all others */
3328 };
3329
3330 enum {  /* video status flags, based on VIDEO_570 */
3331         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3332         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3333         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3334 };
3335
3336 enum {  /* TPACPI_VIDEO_570 constants */
3337         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3338         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3339                                                  * video_status_flags */
3340         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3341         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3342 };
3343
3344 static enum video_access_mode video_supported;
3345 static int video_orig_autosw;
3346
3347 static int video_autosw_get(void);
3348 static int video_autosw_set(int enable);
3349
3350 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3351
3352 static int __init video_init(struct ibm_init_struct *iibm)
3353 {
3354         int ivga;
3355
3356         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3357
3358         TPACPI_ACPIHANDLE_INIT(vid);
3359         TPACPI_ACPIHANDLE_INIT(vid2);
3360
3361         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3362                 /* G41, assume IVGA doesn't change */
3363                 vid_handle = vid2_handle;
3364
3365         if (!vid_handle)
3366                 /* video switching not supported on R30, R31 */
3367                 video_supported = TPACPI_VIDEO_NONE;
3368         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3369                 /* 570 */
3370                 video_supported = TPACPI_VIDEO_570;
3371         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3372                 /* 600e/x, 770e, 770x */
3373                 video_supported = TPACPI_VIDEO_770;
3374         else
3375                 /* all others */
3376                 video_supported = TPACPI_VIDEO_NEW;
3377
3378         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3379                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3380                 video_supported);
3381
3382         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3383 }
3384
3385 static void video_exit(void)
3386 {
3387         dbg_printk(TPACPI_DBG_EXIT,
3388                    "restoring original video autoswitch mode\n");
3389         if (video_autosw_set(video_orig_autosw))
3390                 printk(TPACPI_ERR "error while trying to restore original "
3391                         "video autoswitch mode\n");
3392 }
3393
3394 static int video_outputsw_get(void)
3395 {
3396         int status = 0;
3397         int i;
3398
3399         switch (video_supported) {
3400         case TPACPI_VIDEO_570:
3401                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3402                                  TP_ACPI_VIDEO_570_PHSCMD))
3403                         return -EIO;
3404                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3405                 break;
3406         case TPACPI_VIDEO_770:
3407                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3408                         return -EIO;
3409                 if (i)
3410                         status |= TP_ACPI_VIDEO_S_LCD;
3411                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3412                         return -EIO;
3413                 if (i)
3414                         status |= TP_ACPI_VIDEO_S_CRT;
3415                 break;
3416         case TPACPI_VIDEO_NEW:
3417                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3418                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3419                         return -EIO;
3420                 if (i)
3421                         status |= TP_ACPI_VIDEO_S_CRT;
3422
3423                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3424                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3425                         return -EIO;
3426                 if (i)
3427                         status |= TP_ACPI_VIDEO_S_LCD;
3428                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3429                         return -EIO;
3430                 if (i)
3431                         status |= TP_ACPI_VIDEO_S_DVI;
3432                 break;
3433         default:
3434                 return -ENOSYS;
3435         }
3436
3437         return status;
3438 }
3439
3440 static int video_outputsw_set(int status)
3441 {
3442         int autosw;
3443         int res = 0;
3444
3445         switch (video_supported) {
3446         case TPACPI_VIDEO_570:
3447                 res = acpi_evalf(NULL, NULL,
3448                                  "\\_SB.PHS2", "vdd",
3449                                  TP_ACPI_VIDEO_570_PHS2CMD,
3450                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3451                 break;
3452         case TPACPI_VIDEO_770:
3453                 autosw = video_autosw_get();
3454                 if (autosw < 0)
3455                         return autosw;
3456
3457                 res = video_autosw_set(1);
3458                 if (res)
3459                         return res;
3460                 res = acpi_evalf(vid_handle, NULL,
3461                                  "ASWT", "vdd", status * 0x100, 0);
3462                 if (!autosw && video_autosw_set(autosw)) {
3463                         printk(TPACPI_ERR
3464                                "video auto-switch left enabled due to error\n");
3465                         return -EIO;
3466                 }
3467                 break;
3468         case TPACPI_VIDEO_NEW:
3469                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3470                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3471                 break;
3472         default:
3473                 return -ENOSYS;
3474         }
3475
3476         return (res)? 0 : -EIO;
3477 }
3478
3479 static int video_autosw_get(void)
3480 {
3481         int autosw = 0;
3482
3483         switch (video_supported) {
3484         case TPACPI_VIDEO_570:
3485                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3486                         return -EIO;
3487                 break;
3488         case TPACPI_VIDEO_770:
3489         case TPACPI_VIDEO_NEW:
3490                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3491                         return -EIO;
3492                 break;
3493         default:
3494                 return -ENOSYS;
3495         }
3496
3497         return autosw & 1;
3498 }
3499
3500 static int video_autosw_set(int enable)
3501 {
3502         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3503                 return -EIO;
3504         return 0;
3505 }
3506
3507 static int video_outputsw_cycle(void)
3508 {
3509         int autosw = video_autosw_get();
3510         int res;
3511
3512         if (autosw < 0)
3513                 return autosw;
3514
3515         switch (video_supported) {
3516         case TPACPI_VIDEO_570:
3517                 res = video_autosw_set(1);
3518                 if (res)
3519                         return res;
3520                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3521                 break;
3522         case TPACPI_VIDEO_770:
3523         case TPACPI_VIDEO_NEW:
3524                 res = video_autosw_set(1);
3525                 if (res)
3526                         return res;
3527                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3528                 break;
3529         default:
3530                 return -ENOSYS;
3531         }
3532         if (!autosw && video_autosw_set(autosw)) {
3533                 printk(TPACPI_ERR
3534                        "video auto-switch left enabled due to error\n");
3535                 return -EIO;
3536         }
3537
3538         return (res)? 0 : -EIO;
3539 }
3540
3541 static int video_expand_toggle(void)
3542 {
3543         switch (video_supported) {
3544         case TPACPI_VIDEO_570:
3545                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3546                         0 : -EIO;
3547         case TPACPI_VIDEO_770:
3548                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3549                         0 : -EIO;
3550         case TPACPI_VIDEO_NEW:
3551                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3552                         0 : -EIO;
3553         default:
3554                 return -ENOSYS;
3555         }
3556         /* not reached */
3557 }
3558
3559 static int video_read(char *p)
3560 {
3561         int status, autosw;
3562         int len = 0;
3563
3564         if (video_supported == TPACPI_VIDEO_NONE) {
3565                 len += sprintf(p + len, "status:\t\tnot supported\n");
3566                 return len;
3567         }
3568
3569         status = video_outputsw_get();
3570         if (status < 0)
3571                 return status;
3572
3573         autosw = video_autosw_get();
3574         if (autosw < 0)
3575                 return autosw;
3576
3577         len += sprintf(p + len, "status:\t\tsupported\n");
3578         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3579         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3580         if (video_supported == TPACPI_VIDEO_NEW)
3581                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3582         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3583         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3584         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3585         if (video_supported == TPACPI_VIDEO_NEW)
3586                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3587         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3588         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3589
3590         return len;
3591 }
3592
3593 static int video_write(char *buf)
3594 {
3595         char *cmd;
3596         int enable, disable, status;
3597         int res;
3598
3599         if (video_supported == TPACPI_VIDEO_NONE)
3600                 return -ENODEV;
3601
3602         enable = 0;
3603         disable = 0;
3604
3605         while ((cmd = next_cmd(&buf))) {
3606                 if (strlencmp(cmd, "lcd_enable") == 0) {
3607                         enable |= TP_ACPI_VIDEO_S_LCD;
3608                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3609                         disable |= TP_ACPI_VIDEO_S_LCD;
3610                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3611                         enable |= TP_ACPI_VIDEO_S_CRT;
3612                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3613                         disable |= TP_ACPI_VIDEO_S_CRT;
3614                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3615                            strlencmp(cmd, "dvi_enable") == 0) {
3616                         enable |= TP_ACPI_VIDEO_S_DVI;
3617                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3618                            strlencmp(cmd, "dvi_disable") == 0) {
3619                         disable |= TP_ACPI_VIDEO_S_DVI;
3620                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3621                         res = video_autosw_set(1);
3622                         if (res)
3623                                 return res;
3624                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3625                         res = video_autosw_set(0);
3626                         if (res)
3627                                 return res;
3628                 } else if (strlencmp(cmd, "video_switch") == 0) {
3629                         res = video_outputsw_cycle();
3630                         if (res)
3631                                 return res;
3632                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3633                         res = video_expand_toggle();
3634                         if (res)
3635                                 return res;
3636                 } else
3637                         return -EINVAL;
3638         }
3639
3640         if (enable || disable) {
3641                 status = video_outputsw_get();
3642                 if (status < 0)
3643                         return status;
3644                 res = video_outputsw_set((status & ~disable) | enable);
3645                 if (res)
3646                         return res;
3647         }
3648
3649         return 0;
3650 }
3651
3652 static struct ibm_struct video_driver_data = {
3653         .name = "video",
3654         .read = video_read,
3655         .write = video_write,
3656         .exit = video_exit,
3657 };
3658
3659 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3660
3661 /*************************************************************************
3662  * Light (thinklight) subdriver
3663  */
3664
3665 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3666 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3667
3668 static int light_get_status(void)
3669 {
3670         int status = 0;
3671
3672         if (tp_features.light_status) {
3673                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3674                         return -EIO;
3675                 return (!!status);
3676         }
3677
3678         return -ENXIO;
3679 }
3680
3681 static int light_set_status(int status)
3682 {
3683         int rc;
3684
3685         if (tp_features.light) {
3686                 if (cmos_handle) {
3687                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3688                                         (status)?
3689                                                 TP_CMOS_THINKLIGHT_ON :
3690                                                 TP_CMOS_THINKLIGHT_OFF);
3691                 } else {
3692                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3693                                         (status)? 1 : 0);
3694                 }
3695                 return (rc)? 0 : -EIO;
3696         }
3697
3698         return -ENXIO;
3699 }
3700
3701 static void light_set_status_worker(struct work_struct *work)
3702 {
3703         struct tpacpi_led_classdev *data =
3704                         container_of(work, struct tpacpi_led_classdev, work);
3705
3706         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3707                 light_set_status((data->new_brightness != LED_OFF));
3708 }
3709
3710 static void light_sysfs_set(struct led_classdev *led_cdev,
3711                         enum led_brightness brightness)
3712 {
3713         struct tpacpi_led_classdev *data =
3714                 container_of(led_cdev,
3715                              struct tpacpi_led_classdev,
3716                              led_classdev);
3717         data->new_brightness = brightness;
3718         queue_work(tpacpi_wq, &data->work);
3719 }
3720
3721 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3722 {
3723         return (light_get_status() == 1)? LED_FULL : LED_OFF;
3724 }
3725
3726 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3727         .led_classdev = {
3728                 .name           = "tpacpi::thinklight",
3729                 .brightness_set = &light_sysfs_set,
3730                 .brightness_get = &light_sysfs_get,
3731         }
3732 };
3733
3734 static int __init light_init(struct ibm_init_struct *iibm)
3735 {
3736         int rc;
3737
3738         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3739
3740         TPACPI_ACPIHANDLE_INIT(ledb);
3741         TPACPI_ACPIHANDLE_INIT(lght);
3742         TPACPI_ACPIHANDLE_INIT(cmos);
3743         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3744
3745         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3746         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3747
3748         if (tp_features.light)
3749                 /* light status not supported on
3750                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3751                 tp_features.light_status =
3752                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3753
3754         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3755                 str_supported(tp_features.light),
3756                 str_supported(tp_features.light_status));
3757
3758         if (!tp_features.light)
3759                 return 1;
3760
3761         rc = led_classdev_register(&tpacpi_pdev->dev,
3762                                    &tpacpi_led_thinklight.led_classdev);
3763
3764         if (rc < 0) {
3765                 tp_features.light = 0;
3766                 tp_features.light_status = 0;
3767         } else  {
3768                 rc = 0;
3769         }
3770
3771         return rc;
3772 }
3773
3774 static void light_exit(void)
3775 {
3776         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3777         if (work_pending(&tpacpi_led_thinklight.work))
3778                 flush_workqueue(tpacpi_wq);
3779 }
3780
3781 static int light_read(char *p)
3782 {
3783         int len = 0;
3784         int status;
3785
3786         if (!tp_features.light) {
3787                 len += sprintf(p + len, "status:\t\tnot supported\n");
3788         } else if (!tp_features.light_status) {
3789                 len += sprintf(p + len, "status:\t\tunknown\n");
3790                 len += sprintf(p + len, "commands:\ton, off\n");
3791         } else {
3792                 status = light_get_status();
3793                 if (status < 0)
3794                         return status;
3795                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3796                 len += sprintf(p + len, "commands:\ton, off\n");
3797         }
3798
3799         return len;
3800 }
3801
3802 static int light_write(char *buf)
3803 {
3804         char *cmd;
3805         int newstatus = 0;
3806
3807         if (!tp_features.light)
3808                 return -ENODEV;
3809
3810         while ((cmd = next_cmd(&buf))) {
3811                 if (strlencmp(cmd, "on") == 0) {
3812                         newstatus = 1;
3813                 } else if (strlencmp(cmd, "off") == 0) {
3814                         newstatus = 0;
3815                 } else
3816                         return -EINVAL;
3817         }
3818
3819         return light_set_status(newstatus);
3820 }
3821
3822 static struct ibm_struct light_driver_data = {
3823         .name = "light",
3824         .read = light_read,
3825         .write = light_write,
3826         .exit = light_exit,
3827 };
3828
3829 /*************************************************************************
3830  * Dock subdriver
3831  */
3832
3833 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3834
3835 static void dock_notify(struct ibm_struct *ibm, u32 event);
3836 static int dock_read(char *p);
3837 static int dock_write(char *buf);
3838
3839 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3840            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3841            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3842            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3843     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3844
3845 /* don't list other alternatives as we install a notify handler on the 570 */
3846 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3847
3848 static const struct acpi_device_id ibm_pci_device_ids[] = {
3849         {PCI_ROOT_HID_STRING, 0},
3850         {"", 0},
3851 };
3852
3853 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3854         {
3855          .notify = dock_notify,
3856          .handle = &dock_handle,
3857          .type = ACPI_SYSTEM_NOTIFY,
3858         },
3859         {
3860         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3861          * We just use it to get notifications of dock hotplug
3862          * in very old thinkpads */
3863          .hid = ibm_pci_device_ids,
3864          .notify = dock_notify,
3865          .handle = &pci_handle,
3866          .type = ACPI_SYSTEM_NOTIFY,
3867         },
3868 };
3869
3870 static struct ibm_struct dock_driver_data[2] = {
3871         {
3872          .name = "dock",
3873          .read = dock_read,
3874          .write = dock_write,
3875          .acpi = &ibm_dock_acpidriver[0],
3876         },
3877         {
3878          .name = "dock",
3879          .acpi = &ibm_dock_acpidriver[1],
3880         },
3881 };
3882
3883 #define dock_docked() (_sta(dock_handle) & 1)
3884
3885 static int __init dock_init(struct ibm_init_struct *iibm)
3886 {
3887         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3888
3889         TPACPI_ACPIHANDLE_INIT(dock);
3890
3891         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3892                 str_supported(dock_handle != NULL));
3893
3894         return (dock_handle)? 0 : 1;
3895 }
3896
3897 static int __init dock_init2(struct ibm_init_struct *iibm)
3898 {
3899         int dock2_needed;
3900
3901         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3902
3903         if (dock_driver_data[0].flags.acpi_driver_registered &&
3904             dock_driver_data[0].flags.acpi_notify_installed) {
3905                 TPACPI_ACPIHANDLE_INIT(pci);
3906                 dock2_needed = (pci_handle != NULL);
3907                 vdbg_printk(TPACPI_DBG_INIT,
3908                             "dock PCI handler for the TP 570 is %s\n",
3909                             str_supported(dock2_needed));
3910         } else {
3911                 vdbg_printk(TPACPI_DBG_INIT,
3912                 "dock subdriver part 2 not required\n");
3913                 dock2_needed = 0;
3914         }
3915
3916         return (dock2_needed)? 0 : 1;
3917 }
3918
3919 static void dock_notify(struct ibm_struct *ibm, u32 event)
3920 {
3921         int docked = dock_docked();
3922         int pci = ibm->acpi->hid && ibm->acpi->device &&
3923                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3924         int data;
3925
3926         if (event == 1 && !pci) /* 570 */
3927                 data = 1;       /* button */
3928         else if (event == 1 && pci)     /* 570 */
3929                 data = 3;       /* dock */
3930         else if (event == 3 && docked)
3931                 data = 1;       /* button */
3932         else if (event == 3 && !docked)
3933                 data = 2;       /* undock */
3934         else if (event == 0 && docked)
3935                 data = 3;       /* dock */
3936         else {
3937                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3938                        event, _sta(dock_handle));
3939                 data = 0;       /* unknown */
3940         }
3941         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3942         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3943                                           dev_name(&ibm->acpi->device->dev),
3944                                           event, data);
3945 }
3946
3947 static int dock_read(char *p)
3948 {
3949         int len = 0;
3950         int docked = dock_docked();
3951
3952         if (!dock_handle)
3953                 len += sprintf(p + len, "status:\t\tnot supported\n");
3954         else if (!docked)
3955                 len += sprintf(p + len, "status:\t\tundocked\n");
3956         else {
3957                 len += sprintf(p + len, "status:\t\tdocked\n");
3958                 len += sprintf(p + len, "commands:\tdock, undock\n");
3959         }
3960
3961         return len;
3962 }
3963
3964 static int dock_write(char *buf)
3965 {
3966         char *cmd;
3967
3968         if (!dock_docked())
3969                 return -ENODEV;
3970
3971         while ((cmd = next_cmd(&buf))) {
3972                 if (strlencmp(cmd, "undock") == 0) {
3973                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3974                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3975                                 return -EIO;
3976                 } else if (strlencmp(cmd, "dock") == 0) {
3977                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3978                                 return -EIO;
3979                 } else
3980                         return -EINVAL;
3981         }
3982
3983         return 0;
3984 }
3985
3986 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3987
3988 /*************************************************************************
3989  * Bay subdriver
3990  */
3991
3992 #ifdef CONFIG_THINKPAD_ACPI_BAY
3993
3994 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3995            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3996            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3997            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3998            );                           /* A21e, R30, R31 */
3999 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
4000            "_EJ0",              /* all others */
4001            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4002 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
4003            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4004            );                           /* all others */
4005 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
4006            "_EJ0",                      /* 770x */
4007            );                           /* all others */
4008
4009 static int __init bay_init(struct ibm_init_struct *iibm)
4010 {
4011         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4012
4013         TPACPI_ACPIHANDLE_INIT(bay);
4014         if (bay_handle)
4015                 TPACPI_ACPIHANDLE_INIT(bay_ej);
4016         TPACPI_ACPIHANDLE_INIT(bay2);
4017         if (bay2_handle)
4018                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4019
4020         tp_features.bay_status = bay_handle &&
4021                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4022         tp_features.bay_status2 = bay2_handle &&
4023                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4024
4025         tp_features.bay_eject = bay_handle && bay_ej_handle &&
4026                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4027         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4028                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4029
4030         vdbg_printk(TPACPI_DBG_INIT,
4031                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4032                 str_supported(tp_features.bay_status),
4033                 str_supported(tp_features.bay_eject),
4034                 str_supported(tp_features.bay_status2),
4035                 str_supported(tp_features.bay_eject2));
4036
4037         return (tp_features.bay_status || tp_features.bay_eject ||
4038                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4039 }
4040
4041 static void bay_notify(struct ibm_struct *ibm, u32 event)
4042 {
4043         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4044         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4045                                           dev_name(&ibm->acpi->device->dev),
4046                                           event, 0);
4047 }
4048
4049 #define bay_occupied(b) (_sta(b##_handle) & 1)
4050
4051 static int bay_read(char *p)
4052 {
4053         int len = 0;
4054         int occupied = bay_occupied(bay);
4055         int occupied2 = bay_occupied(bay2);
4056         int eject, eject2;
4057
4058         len += sprintf(p + len, "status:\t\t%s\n",
4059                 tp_features.bay_status ?
4060                         (occupied ? "occupied" : "unoccupied") :
4061                                 "not supported");
4062         if (tp_features.bay_status2)
4063                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4064                                "occupied" : "unoccupied");
4065
4066         eject = tp_features.bay_eject && occupied;
4067         eject2 = tp_features.bay_eject2 && occupied2;
4068
4069         if (eject && eject2)
4070                 len += sprintf(p + len, "commands:\teject, eject2\n");
4071         else if (eject)
4072                 len += sprintf(p + len, "commands:\teject\n");
4073         else if (eject2)
4074                 len += sprintf(p + len, "commands:\teject2\n");
4075
4076         return len;
4077 }
4078
4079 static int bay_write(char *buf)
4080 {
4081         char *cmd;
4082
4083         if (!tp_features.bay_eject && !tp_features.bay_eject2)
4084                 return -ENODEV;
4085
4086         while ((cmd = next_cmd(&buf))) {
4087                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4088                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4089                                 return -EIO;
4090                 } else if (tp_features.bay_eject2 &&
4091                            strlencmp(cmd, "eject2") == 0) {
4092                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4093                                 return -EIO;
4094                 } else
4095                         return -EINVAL;
4096         }
4097
4098         return 0;
4099 }
4100
4101 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4102         .notify = bay_notify,
4103         .handle = &bay_handle,
4104         .type = ACPI_SYSTEM_NOTIFY,
4105 };
4106
4107 static struct ibm_struct bay_driver_data = {
4108         .name = "bay",
4109         .read = bay_read,
4110         .write = bay_write,
4111         .acpi = &ibm_bay_acpidriver,
4112 };
4113
4114 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4115
4116 /*************************************************************************
4117  * CMOS subdriver
4118  */
4119
4120 /* sysfs cmos_command -------------------------------------------------- */
4121 static ssize_t cmos_command_store(struct device *dev,
4122                             struct device_attribute *attr,
4123                             const char *buf, size_t count)
4124 {
4125         unsigned long cmos_cmd;
4126         int res;
4127
4128         if (parse_strtoul(buf, 21, &cmos_cmd))
4129                 return -EINVAL;
4130
4131         res = issue_thinkpad_cmos_command(cmos_cmd);
4132         return (res)? res : count;
4133 }
4134
4135 static struct device_attribute dev_attr_cmos_command =
4136         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4137
4138 /* --------------------------------------------------------------------- */
4139
4140 static int __init cmos_init(struct ibm_init_struct *iibm)
4141 {
4142         int res;
4143
4144         vdbg_printk(TPACPI_DBG_INIT,
4145                 "initializing cmos commands subdriver\n");
4146
4147         TPACPI_ACPIHANDLE_INIT(cmos);
4148
4149         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4150                 str_supported(cmos_handle != NULL));
4151
4152         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4153         if (res)
4154                 return res;
4155
4156         return (cmos_handle)? 0 : 1;
4157 }
4158
4159 static void cmos_exit(void)
4160 {
4161         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4162 }
4163
4164 static int cmos_read(char *p)
4165 {
4166         int len = 0;
4167
4168         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4169            R30, R31, T20-22, X20-21 */
4170         if (!cmos_handle)
4171                 len += sprintf(p + len, "status:\t\tnot supported\n");
4172         else {
4173                 len += sprintf(p + len, "status:\t\tsupported\n");
4174                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4175         }
4176
4177         return len;
4178 }
4179
4180 static int cmos_write(char *buf)
4181 {
4182         char *cmd;
4183         int cmos_cmd, res;
4184
4185         while ((cmd = next_cmd(&buf))) {
4186                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4187                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4188                         /* cmos_cmd set */
4189                 } else
4190                         return -EINVAL;
4191
4192                 res = issue_thinkpad_cmos_command(cmos_cmd);
4193                 if (res)
4194                         return res;
4195         }
4196
4197         return 0;
4198 }
4199
4200 static struct ibm_struct cmos_driver_data = {
4201         .name = "cmos",
4202         .read = cmos_read,
4203         .write = cmos_write,
4204         .exit = cmos_exit,
4205 };
4206
4207 /*************************************************************************
4208  * LED subdriver
4209  */
4210
4211 enum led_access_mode {
4212         TPACPI_LED_NONE = 0,
4213         TPACPI_LED_570, /* 570 */
4214         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4215         TPACPI_LED_NEW, /* all others */
4216 };
4217
4218 enum {  /* For TPACPI_LED_OLD */
4219         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4220         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4221         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4222 };
4223
4224 enum led_status_t {
4225         TPACPI_LED_OFF = 0,
4226         TPACPI_LED_ON,
4227         TPACPI_LED_BLINK,
4228 };
4229
4230 static enum led_access_mode led_supported;
4231
4232 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4233            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4234                                 /* T20-22, X20-21 */
4235            "LED",               /* all others */
4236            );                   /* R30, R31 */
4237
4238 #define TPACPI_LED_NUMLEDS 8
4239 static struct tpacpi_led_classdev *tpacpi_leds;
4240 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4241 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4242         /* there's a limit of 19 chars + NULL before 2.6.26 */
4243         "tpacpi::power",
4244         "tpacpi:orange:batt",
4245         "tpacpi:green:batt",
4246         "tpacpi::dock_active",
4247         "tpacpi::bay_active",
4248         "tpacpi::dock_batt",
4249         "tpacpi::unknown_led",
4250         "tpacpi::standby",
4251 };
4252
4253 static int led_get_status(const unsigned int led)
4254 {
4255         int status;
4256         enum led_status_t led_s;
4257
4258         switch (led_supported) {
4259         case TPACPI_LED_570:
4260                 if (!acpi_evalf(ec_handle,
4261                                 &status, "GLED", "dd", 1 << led))
4262                         return -EIO;
4263                 led_s = (status == 0)?
4264                                 TPACPI_LED_OFF :
4265                                 ((status == 1)?
4266                                         TPACPI_LED_ON :
4267                                         TPACPI_LED_BLINK);
4268                 tpacpi_led_state_cache[led] = led_s;
4269                 return led_s;
4270         default:
4271                 return -ENXIO;
4272         }
4273
4274         /* not reached */
4275 }
4276
4277 static int led_set_status(const unsigned int led,
4278                           const enum led_status_t ledstatus)
4279 {
4280         /* off, on, blink. Index is led_status_t */
4281         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4282         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4283
4284         int rc = 0;
4285
4286         switch (led_supported) {
4287         case TPACPI_LED_570:
4288                 /* 570 */
4289                 if (led > 7)
4290                         return -EINVAL;
4291                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4292                                 (1 << led), led_sled_arg1[ledstatus]))
4293                         rc = -EIO;
4294                 break;
4295         case TPACPI_LED_OLD:
4296                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4297                 if (led > 7)
4298                         return -EINVAL;
4299                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4300                 if (rc >= 0)
4301                         rc = ec_write(TPACPI_LED_EC_HLBL,
4302                                       (ledstatus == TPACPI_LED_BLINK) << led);
4303                 if (rc >= 0)
4304                         rc = ec_write(TPACPI_LED_EC_HLCL,
4305                                       (ledstatus != TPACPI_LED_OFF) << led);
4306                 break;
4307         case TPACPI_LED_NEW:
4308                 /* all others */
4309                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4310                                 led, led_led_arg1[ledstatus]))
4311                         rc = -EIO;
4312                 break;
4313         default:
4314                 rc = -ENXIO;
4315         }
4316
4317         if (!rc)
4318                 tpacpi_led_state_cache[led] = ledstatus;
4319
4320         return rc;
4321 }
4322
4323 static void led_sysfs_set_status(unsigned int led,
4324                                  enum led_brightness brightness)
4325 {
4326         led_set_status(led,
4327                         (brightness == LED_OFF) ?
4328                         TPACPI_LED_OFF :
4329                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4330                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
4331 }
4332
4333 static void led_set_status_worker(struct work_struct *work)
4334 {
4335         struct tpacpi_led_classdev *data =
4336                 container_of(work, struct tpacpi_led_classdev, work);
4337
4338         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4339                 led_sysfs_set_status(data->led, data->new_brightness);
4340 }
4341
4342 static void led_sysfs_set(struct led_classdev *led_cdev,
4343                         enum led_brightness brightness)
4344 {
4345         struct tpacpi_led_classdev *data = container_of(led_cdev,
4346                              struct tpacpi_led_classdev, led_classdev);
4347
4348         data->new_brightness = brightness;
4349         queue_work(tpacpi_wq, &data->work);
4350 }
4351
4352 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4353                         unsigned long *delay_on, unsigned long *delay_off)
4354 {
4355         struct tpacpi_led_classdev *data = container_of(led_cdev,
4356                              struct tpacpi_led_classdev, led_classdev);
4357
4358         /* Can we choose the flash rate? */
4359         if (*delay_on == 0 && *delay_off == 0) {
4360                 /* yes. set them to the hardware blink rate (1 Hz) */
4361                 *delay_on = 500; /* ms */
4362                 *delay_off = 500; /* ms */
4363         } else if ((*delay_on != 500) || (*delay_off != 500))
4364                 return -EINVAL;
4365
4366         data->new_brightness = TPACPI_LED_BLINK;
4367         queue_work(tpacpi_wq, &data->work);
4368
4369         return 0;
4370 }
4371
4372 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4373 {
4374         int rc;
4375
4376         struct tpacpi_led_classdev *data = container_of(led_cdev,
4377                              struct tpacpi_led_classdev, led_classdev);
4378
4379         rc = led_get_status(data->led);
4380
4381         if (rc == TPACPI_LED_OFF || rc < 0)
4382                 rc = LED_OFF;   /* no error handling in led class :( */
4383         else
4384                 rc = LED_FULL;
4385
4386         return rc;
4387 }
4388
4389 static void led_exit(void)
4390 {
4391         unsigned int i;
4392
4393         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4394                 if (tpacpi_leds[i].led_classdev.name)
4395                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4396         }
4397
4398         kfree(tpacpi_leds);
4399 }
4400
4401 static int __init led_init(struct ibm_init_struct *iibm)
4402 {
4403         unsigned int i;
4404         int rc;
4405
4406         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4407
4408         TPACPI_ACPIHANDLE_INIT(led);
4409
4410         if (!led_handle)
4411                 /* led not supported on R30, R31 */
4412                 led_supported = TPACPI_LED_NONE;
4413         else if (strlencmp(led_path, "SLED") == 0)
4414                 /* 570 */
4415                 led_supported = TPACPI_LED_570;
4416         else if (strlencmp(led_path, "SYSL") == 0)
4417                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4418                 led_supported = TPACPI_LED_OLD;
4419         else
4420                 /* all others */
4421                 led_supported = TPACPI_LED_NEW;
4422
4423         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4424                 str_supported(led_supported), led_supported);
4425
4426         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4427                               GFP_KERNEL);
4428         if (!tpacpi_leds) {
4429                 printk(TPACPI_ERR "Out of memory for LED data\n");
4430                 return -ENOMEM;
4431         }
4432
4433         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4434                 tpacpi_leds[i].led = i;
4435
4436                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4437                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4438                 if (led_supported == TPACPI_LED_570)
4439                         tpacpi_leds[i].led_classdev.brightness_get =
4440                                                         &led_sysfs_get;
4441
4442                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4443
4444                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4445
4446                 rc = led_classdev_register(&tpacpi_pdev->dev,
4447                                            &tpacpi_leds[i].led_classdev);
4448                 if (rc < 0) {
4449                         tpacpi_leds[i].led_classdev.name = NULL;
4450                         led_exit();
4451                         return rc;
4452                 }
4453         }
4454
4455         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4456 }
4457
4458 #define str_led_status(s) \
4459         ((s) == TPACPI_LED_OFF ? "off" : \
4460                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4461
4462 static int led_read(char *p)
4463 {
4464         int len = 0;
4465
4466         if (!led_supported) {
4467                 len += sprintf(p + len, "status:\t\tnot supported\n");
4468                 return len;
4469         }
4470         len += sprintf(p + len, "status:\t\tsupported\n");
4471
4472         if (led_supported == TPACPI_LED_570) {
4473                 /* 570 */
4474                 int i, status;
4475                 for (i = 0; i < 8; i++) {
4476                         status = led_get_status(i);
4477                         if (status < 0)
4478                                 return -EIO;
4479                         len += sprintf(p + len, "%d:\t\t%s\n",
4480                                        i, str_led_status(status));
4481                 }
4482         }
4483
4484         len += sprintf(p + len, "commands:\t"
4485                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4486
4487         return len;
4488 }
4489
4490 static int led_write(char *buf)
4491 {
4492         char *cmd;
4493         int led, rc;
4494         enum led_status_t s;
4495
4496         if (!led_supported)
4497                 return -ENODEV;
4498
4499         while ((cmd = next_cmd(&buf))) {
4500                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4501                         return -EINVAL;
4502
4503                 if (strstr(cmd, "off")) {
4504                         s = TPACPI_LED_OFF;
4505                 } else if (strstr(cmd, "on")) {
4506                         s = TPACPI_LED_ON;
4507                 } else if (strstr(cmd, "blink")) {
4508                         s = TPACPI_LED_BLINK;
4509                 } else {
4510                         return -EINVAL;
4511                 }
4512
4513                 rc = led_set_status(led, s);
4514                 if (rc < 0)
4515                         return rc;
4516         }
4517
4518         return 0;
4519 }
4520
4521 static struct ibm_struct led_driver_data = {
4522         .name = "led",
4523         .read = led_read,
4524         .write = led_write,
4525         .exit = led_exit,
4526 };
4527
4528 /*************************************************************************
4529  * Beep subdriver
4530  */
4531
4532 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4533
4534 static int __init beep_init(struct ibm_init_struct *iibm)
4535 {
4536         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4537
4538         TPACPI_ACPIHANDLE_INIT(beep);
4539
4540         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4541                 str_supported(beep_handle != NULL));
4542
4543         return (beep_handle)? 0 : 1;
4544 }
4545
4546 static int beep_read(char *p)
4547 {
4548         int len = 0;
4549
4550         if (!beep_handle)
4551                 len += sprintf(p + len, "status:\t\tnot supported\n");
4552         else {
4553                 len += sprintf(p + len, "status:\t\tsupported\n");
4554                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4555         }
4556
4557         return len;
4558 }
4559
4560 static int beep_write(char *buf)
4561 {
4562         char *cmd;
4563         int beep_cmd;
4564
4565         if (!beep_handle)
4566                 return -ENODEV;
4567
4568         while ((cmd = next_cmd(&buf))) {
4569                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4570                     beep_cmd >= 0 && beep_cmd <= 17) {
4571                         /* beep_cmd set */
4572                 } else
4573                         return -EINVAL;
4574                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4575                         return -EIO;
4576         }
4577
4578         return 0;
4579 }
4580
4581 static struct ibm_struct beep_driver_data = {
4582         .name = "beep",
4583         .read = beep_read,
4584         .write = beep_write,
4585 };
4586
4587 /*************************************************************************
4588  * Thermal subdriver
4589  */
4590
4591 enum thermal_access_mode {
4592         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4593         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4594         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4595         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4596         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4597 };
4598
4599 enum { /* TPACPI_THERMAL_TPEC_* */
4600         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4601         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4602         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4603 };
4604
4605 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4606 struct ibm_thermal_sensors_struct {
4607         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4608 };
4609
4610 static enum thermal_access_mode thermal_read_mode;
4611
4612 /* idx is zero-based */
4613 static int thermal_get_sensor(int idx, s32 *value)
4614 {
4615         int t;
4616         s8 tmp;
4617         char tmpi[5];
4618
4619         t = TP_EC_THERMAL_TMP0;
4620
4621         switch (thermal_read_mode) {
4622 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4623         case TPACPI_THERMAL_TPEC_16:
4624                 if (idx >= 8 && idx <= 15) {
4625                         t = TP_EC_THERMAL_TMP8;
4626                         idx -= 8;
4627                 }
4628                 /* fallthrough */
4629 #endif
4630         case TPACPI_THERMAL_TPEC_8:
4631                 if (idx <= 7) {
4632                         if (!acpi_ec_read(t + idx, &tmp))
4633                                 return -EIO;
4634                         *value = tmp * 1000;
4635                         return 0;
4636                 }
4637                 break;
4638
4639         case TPACPI_THERMAL_ACPI_UPDT:
4640                 if (idx <= 7) {
4641                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4642                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4643                                 return -EIO;
4644                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4645                                 return -EIO;
4646                         *value = (t - 2732) * 100;
4647                         return 0;
4648                 }
4649                 break;
4650
4651         case TPACPI_THERMAL_ACPI_TMP07:
4652                 if (idx <= 7) {
4653                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4654                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4655                                 return -EIO;
4656                         if (t > 127 || t < -127)
4657                                 t = TP_EC_THERMAL_TMP_NA;
4658                         *value = t * 1000;
4659                         return 0;
4660                 }
4661                 break;
4662
4663         case TPACPI_THERMAL_NONE:
4664         default:
4665                 return -ENOSYS;
4666         }
4667
4668         return -EINVAL;
4669 }
4670
4671 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4672 {
4673         int res, i;
4674         int n;
4675
4676         n = 8;
4677         i = 0;
4678
4679         if (!s)
4680                 return -EINVAL;
4681
4682         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4683                 n = 16;
4684
4685         for (i = 0 ; i < n; i++) {
4686                 res = thermal_get_sensor(i, &s->temp[i]);
4687                 if (res)
4688                         return res;
4689         }
4690
4691         return n;
4692 }
4693
4694 /* sysfs temp##_input -------------------------------------------------- */
4695
4696 static ssize_t thermal_temp_input_show(struct device *dev,
4697                            struct device_attribute *attr,
4698                            char *buf)
4699 {
4700         struct sensor_device_attribute *sensor_attr =
4701                                         to_sensor_dev_attr(attr);
4702         int idx = sensor_attr->index;
4703         s32 value;
4704         int res;
4705
4706         res = thermal_get_sensor(idx, &value);
4707         if (res)
4708                 return res;
4709         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4710                 return -ENXIO;
4711
4712         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4713 }
4714
4715 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4716          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4717                      thermal_temp_input_show, NULL, _idxB)
4718
4719 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4720         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4721         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4722         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4723         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4724         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4725         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4726         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4727         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4728         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4729         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4730         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4731         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4732         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4733         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4734         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4735         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4736 };
4737
4738 #define THERMAL_ATTRS(X) \
4739         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4740
4741 static struct attribute *thermal_temp_input_attr[] = {
4742         THERMAL_ATTRS(8),
4743         THERMAL_ATTRS(9),
4744         THERMAL_ATTRS(10),
4745         THERMAL_ATTRS(11),
4746         THERMAL_ATTRS(12),
4747         THERMAL_ATTRS(13),
4748         THERMAL_ATTRS(14),
4749         THERMAL_ATTRS(15),
4750         THERMAL_ATTRS(0),
4751         THERMAL_ATTRS(1),
4752         THERMAL_ATTRS(2),
4753         THERMAL_ATTRS(3),
4754         THERMAL_ATTRS(4),
4755         THERMAL_ATTRS(5),
4756         THERMAL_ATTRS(6),
4757         THERMAL_ATTRS(7),
4758         NULL
4759 };
4760
4761 static const struct attribute_group thermal_temp_input16_group = {
4762         .attrs = thermal_temp_input_attr
4763 };
4764
4765 static const struct attribute_group thermal_temp_input8_group = {
4766         .attrs = &thermal_temp_input_attr[8]
4767 };
4768
4769 #undef THERMAL_SENSOR_ATTR_TEMP
4770 #undef THERMAL_ATTRS
4771
4772 /* --------------------------------------------------------------------- */
4773
4774 static int __init thermal_init(struct ibm_init_struct *iibm)
4775 {
4776         u8 t, ta1, ta2;
4777         int i;
4778         int acpi_tmp7;
4779         int res;
4780
4781         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4782
4783         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4784
4785         if (thinkpad_id.ec_model) {
4786                 /*
4787                  * Direct EC access mode: sensors at registers
4788                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4789                  * non-implemented, thermal sensors return 0x80 when
4790                  * not available
4791                  */
4792
4793                 ta1 = ta2 = 0;
4794                 for (i = 0; i < 8; i++) {
4795                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4796                                 ta1 |= t;
4797                         } else {
4798                                 ta1 = 0;
4799                                 break;
4800                         }
4801                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4802                                 ta2 |= t;
4803                         } else {
4804                                 ta1 = 0;
4805                                 break;
4806                         }
4807                 }
4808                 if (ta1 == 0) {
4809                         /* This is sheer paranoia, but we handle it anyway */
4810                         if (acpi_tmp7) {
4811                                 printk(TPACPI_ERR
4812                                        "ThinkPad ACPI EC access misbehaving, "
4813                                        "falling back to ACPI TMPx access "
4814                                        "mode\n");
4815                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4816                         } else {
4817                                 printk(TPACPI_ERR
4818                                        "ThinkPad ACPI EC access misbehaving, "
4819                                        "disabling thermal sensors access\n");
4820                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4821                         }
4822                 } else {
4823                         thermal_read_mode =
4824                             (ta2 != 0) ?
4825                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4826                 }
4827         } else if (acpi_tmp7) {
4828                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4829                         /* 600e/x, 770e, 770x */
4830                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4831                 } else {
4832                         /* Standard ACPI TMPx access, max 8 sensors */
4833                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4834                 }
4835         } else {
4836                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4837                 thermal_read_mode = TPACPI_THERMAL_NONE;
4838         }
4839
4840         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4841                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4842                 thermal_read_mode);
4843
4844         switch (thermal_read_mode) {
4845         case TPACPI_THERMAL_TPEC_16:
4846                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4847                                 &thermal_temp_input16_group);
4848                 if (res)
4849                         return res;
4850                 break;
4851         case TPACPI_THERMAL_TPEC_8:
4852         case TPACPI_THERMAL_ACPI_TMP07:
4853         case TPACPI_THERMAL_ACPI_UPDT:
4854                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4855                                 &thermal_temp_input8_group);
4856                 if (res)
4857                         return res;
4858                 break;
4859         case TPACPI_THERMAL_NONE:
4860         default:
4861                 return 1;
4862         }
4863
4864         return 0;
4865 }
4866
4867 static void thermal_exit(void)
4868 {
4869         switch (thermal_read_mode) {
4870         case TPACPI_THERMAL_TPEC_16:
4871                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4872                                    &thermal_temp_input16_group);
4873                 break;
4874         case TPACPI_THERMAL_TPEC_8:
4875         case TPACPI_THERMAL_ACPI_TMP07:
4876         case TPACPI_THERMAL_ACPI_UPDT:
4877                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4878                                    &thermal_temp_input16_group);
4879                 break;
4880         case TPACPI_THERMAL_NONE:
4881         default:
4882                 break;
4883         }
4884 }
4885
4886 static int thermal_read(char *p)
4887 {
4888         int len = 0;
4889         int n, i;
4890         struct ibm_thermal_sensors_struct t;
4891
4892         n = thermal_get_sensors(&t);
4893         if (unlikely(n < 0))
4894                 return n;
4895
4896         len += sprintf(p + len, "temperatures:\t");
4897
4898         if (n > 0) {
4899                 for (i = 0; i < (n - 1); i++)
4900                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4901                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4902         } else
4903                 len += sprintf(p + len, "not supported\n");
4904
4905         return len;
4906 }
4907
4908 static struct ibm_struct thermal_driver_data = {
4909         .name = "thermal",
4910         .read = thermal_read,
4911         .exit = thermal_exit,
4912 };
4913
4914 /*************************************************************************
4915  * EC Dump subdriver
4916  */
4917
4918 static u8 ecdump_regs[256];
4919
4920 static int ecdump_read(char *p)
4921 {
4922         int len = 0;
4923         int i, j;
4924         u8 v;
4925
4926         len += sprintf(p + len, "EC      "
4927                        " +00 +01 +02 +03 +04 +05 +06 +07"
4928                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4929         for (i = 0; i < 256; i += 16) {
4930                 len += sprintf(p + len, "EC 0x%02x:", i);
4931                 for (j = 0; j < 16; j++) {
4932                         if (!acpi_ec_read(i + j, &v))
4933                                 break;
4934                         if (v != ecdump_regs[i + j])
4935                                 len += sprintf(p + len, " *%02x", v);
4936                         else
4937                                 len += sprintf(p + len, "  %02x", v);
4938                         ecdump_regs[i + j] = v;
4939                 }
4940                 len += sprintf(p + len, "\n");
4941                 if (j != 16)
4942                         break;
4943         }
4944
4945         /* These are way too dangerous to advertise openly... */
4946 #if 0
4947         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4948                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4949         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4950                        " (<offset> is 00-ff, <value> is 0-255)\n");
4951 #endif
4952         return len;
4953 }
4954
4955 static int ecdump_write(char *buf)
4956 {
4957         char *cmd;
4958         int i, v;
4959
4960         while ((cmd = next_cmd(&buf))) {
4961                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4962                         /* i and v set */
4963                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4964                         /* i and v set */
4965                 } else
4966                         return -EINVAL;
4967                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4968                         if (!acpi_ec_write(i, v))
4969                                 return -EIO;
4970                 } else
4971                         return -EINVAL;
4972         }
4973
4974         return 0;
4975 }
4976
4977 static struct ibm_struct ecdump_driver_data = {
4978         .name = "ecdump",
4979         .read = ecdump_read,
4980         .write = ecdump_write,
4981         .flags.experimental = 1,
4982 };
4983
4984 /*************************************************************************
4985  * Backlight/brightness subdriver
4986  */
4987
4988 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4989
4990 enum {
4991         TP_EC_BACKLIGHT = 0x31,
4992
4993         /* TP_EC_BACKLIGHT bitmasks */
4994         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4995         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4996         TP_EC_BACKLIGHT_MAPSW = 0x20,
4997 };
4998
4999 static struct backlight_device *ibm_backlight_device;
5000 static int brightness_mode;
5001 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5002
5003 static struct mutex brightness_mutex;
5004
5005 /*
5006  * ThinkPads can read brightness from two places: EC 0x31, or
5007  * CMOS NVRAM byte 0x5E, bits 0-3.
5008  *
5009  * EC 0x31 has the following layout
5010  *   Bit 7: unknown function
5011  *   Bit 6: unknown function
5012  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5013  *   Bit 4: must be set to zero to avoid problems
5014  *   Bit 3-0: backlight brightness level
5015  *
5016  * brightness_get_raw returns status data in the EC 0x31 layout
5017  */
5018 static int brightness_get_raw(int *status)
5019 {
5020         u8 lec = 0, lcmos = 0, level = 0;
5021
5022         if (brightness_mode & 1) {
5023                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5024                         return -EIO;
5025                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5026         };
5027         if (brightness_mode & 2) {
5028                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5029                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5030                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5031                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5032                 level = lcmos;
5033         }
5034
5035         if (brightness_mode == 3) {
5036                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
5037                 lec &= TP_EC_BACKLIGHT_LVLMSK;
5038                 if (lec == lcmos)
5039                         tp_warned.bright_cmos_ec_unsync = 0;
5040                 else {
5041                         if (!tp_warned.bright_cmos_ec_unsync) {
5042                                 printk(TPACPI_ERR
5043                                         "CMOS NVRAM (%u) and EC (%u) do not "
5044                                         "agree on display brightness level\n",
5045                                         (unsigned int) lcmos,
5046                                         (unsigned int) lec);
5047                                 tp_warned.bright_cmos_ec_unsync = 1;
5048                         }
5049                         return -EIO;
5050                 }
5051         } else {
5052                 *status = level;
5053         }
5054
5055         return 0;
5056 }
5057
5058 /* May return EINTR which can always be mapped to ERESTARTSYS */
5059 static int brightness_set(int value)
5060 {
5061         int cmos_cmd, inc, i, res;
5062         int current_value;
5063         int command_bits;
5064
5065         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5066             value < 0)
5067                 return -EINVAL;
5068
5069         res = mutex_lock_interruptible(&brightness_mutex);
5070         if (res < 0)
5071                 return res;
5072
5073         res = brightness_get_raw(&current_value);
5074         if (res < 0)
5075                 goto errout;
5076
5077         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5078         current_value &= TP_EC_BACKLIGHT_LVLMSK;
5079
5080         cmos_cmd = value > current_value ?
5081                         TP_CMOS_BRIGHTNESS_UP :
5082                         TP_CMOS_BRIGHTNESS_DOWN;
5083         inc = (value > current_value)? 1 : -1;
5084
5085         res = 0;
5086         for (i = current_value; i != value; i += inc) {
5087                 if ((brightness_mode & 2) &&
5088                     issue_thinkpad_cmos_command(cmos_cmd)) {
5089                         res = -EIO;
5090                         goto errout;
5091                 }
5092                 if ((brightness_mode & 1) &&
5093                     !acpi_ec_write(TP_EC_BACKLIGHT,
5094                                    (i + inc) | command_bits)) {
5095                         res = -EIO;
5096                         goto errout;;
5097                 }
5098         }
5099
5100 errout:
5101         mutex_unlock(&brightness_mutex);
5102         return res;
5103 }
5104
5105 /* sysfs backlight class ----------------------------------------------- */
5106
5107 static int brightness_update_status(struct backlight_device *bd)
5108 {
5109         /* it is the backlight class's job (caller) to handle
5110          * EINTR and other errors properly */
5111         return brightness_set(
5112                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5113                  bd->props.power == FB_BLANK_UNBLANK) ?
5114                                 bd->props.brightness : 0);
5115 }
5116
5117 static int brightness_get(struct backlight_device *bd)
5118 {
5119         int status, res;
5120
5121         res = brightness_get_raw(&status);
5122         if (res < 0)
5123                 return 0; /* FIXME: teach backlight about error handling */
5124
5125         return status & TP_EC_BACKLIGHT_LVLMSK;
5126 }
5127
5128 static struct backlight_ops ibm_backlight_data = {
5129         .get_brightness = brightness_get,
5130         .update_status  = brightness_update_status,
5131 };
5132
5133 /* --------------------------------------------------------------------- */
5134
5135 static int __init brightness_init(struct ibm_init_struct *iibm)
5136 {
5137         int b;
5138
5139         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5140
5141         mutex_init(&brightness_mutex);
5142
5143         /*
5144          * We always attempt to detect acpi support, so as to switch
5145          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5146          * going to publish a backlight interface
5147          */
5148         b = tpacpi_check_std_acpi_brightness_support();
5149         if (b > 0) {
5150
5151                 if (acpi_video_backlight_support()) {
5152                         if (brightness_enable > 1) {
5153                                 printk(TPACPI_NOTICE
5154                                        "Standard ACPI backlight interface "
5155                                        "available, not loading native one.\n");
5156                                 return 1;
5157                         } else if (brightness_enable == 1) {
5158                                 printk(TPACPI_NOTICE
5159                                        "Backlight control force enabled, even if standard "
5160                                        "ACPI backlight interface is available\n");
5161                         }
5162                 } else {
5163                         if (brightness_enable > 1) {
5164                                 printk(TPACPI_NOTICE
5165                                        "Standard ACPI backlight interface not "
5166                                        "available, thinkpad_acpi native "
5167                                        "brightness control enabled\n");
5168                         }
5169                 }
5170         }
5171
5172         if (!brightness_enable) {
5173                 dbg_printk(TPACPI_DBG_INIT,
5174                            "brightness support disabled by "
5175                            "module parameter\n");
5176                 return 1;
5177         }
5178
5179         if (b > 16) {
5180                 printk(TPACPI_ERR
5181                        "Unsupported brightness interface, "
5182                        "please contact %s\n", TPACPI_MAIL);
5183                 return 1;
5184         }
5185         if (b == 16)
5186                 tp_features.bright_16levels = 1;
5187
5188         if (!brightness_mode) {
5189                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5190                         brightness_mode = 2;
5191                 else
5192                         brightness_mode = 3;
5193
5194                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5195                         brightness_mode);
5196         }
5197
5198         if (brightness_mode > 3)
5199                 return -EINVAL;
5200
5201         if (brightness_get_raw(&b) < 0)
5202                 return 1;
5203
5204         if (tp_features.bright_16levels)
5205                 printk(TPACPI_INFO
5206                        "detected a 16-level brightness capable ThinkPad\n");
5207
5208         ibm_backlight_device = backlight_device_register(
5209                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5210                                         &ibm_backlight_data);
5211         if (IS_ERR(ibm_backlight_device)) {
5212                 printk(TPACPI_ERR "Could not register backlight device\n");
5213                 return PTR_ERR(ibm_backlight_device);
5214         }
5215         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5216
5217         ibm_backlight_device->props.max_brightness =
5218                                 (tp_features.bright_16levels)? 15 : 7;
5219         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5220         backlight_update_status(ibm_backlight_device);
5221
5222         return 0;
5223 }
5224
5225 static void brightness_exit(void)
5226 {
5227         if (ibm_backlight_device) {
5228                 vdbg_printk(TPACPI_DBG_EXIT,
5229                             "calling backlight_device_unregister()\n");
5230                 backlight_device_unregister(ibm_backlight_device);
5231         }
5232 }
5233
5234 static int brightness_read(char *p)
5235 {
5236         int len = 0;
5237         int level;
5238
5239         level = brightness_get(NULL);
5240         if (level < 0) {
5241                 len += sprintf(p + len, "level:\t\tunreadable\n");
5242         } else {
5243                 len += sprintf(p + len, "level:\t\t%d\n", level);
5244                 len += sprintf(p + len, "commands:\tup, down\n");
5245                 len += sprintf(p + len, "commands:\tlevel <level>"
5246                                " (<level> is 0-%d)\n",
5247                                (tp_features.bright_16levels) ? 15 : 7);
5248         }
5249
5250         return len;
5251 }
5252
5253 static int brightness_write(char *buf)
5254 {
5255         int level;
5256         int rc;
5257         char *cmd;
5258         int max_level = (tp_features.bright_16levels) ? 15 : 7;
5259
5260         level = brightness_get(NULL);
5261         if (level < 0)
5262                 return level;
5263
5264         while ((cmd = next_cmd(&buf))) {
5265                 if (strlencmp(cmd, "up") == 0) {
5266                         if (level < max_level)
5267                                 level++;
5268                 } else if (strlencmp(cmd, "down") == 0) {
5269                         if (level > 0)
5270                                 level--;
5271                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5272                            level >= 0 && level <= max_level) {
5273                         /* new level set */
5274                 } else
5275                         return -EINVAL;
5276         }
5277
5278         /*
5279          * Now we know what the final level should be, so we try to set it.
5280          * Doing it this way makes the syscall restartable in case of EINTR
5281          */
5282         rc = brightness_set(level);
5283         return (rc == -EINTR)? ERESTARTSYS : rc;
5284 }
5285
5286 static struct ibm_struct brightness_driver_data = {
5287         .name = "brightness",
5288         .read = brightness_read,
5289         .write = brightness_write,
5290         .exit = brightness_exit,
5291 };
5292
5293 /*************************************************************************
5294  * Volume subdriver
5295  */
5296
5297 static int volume_offset = 0x30;
5298
5299 static int volume_read(char *p)
5300 {
5301         int len = 0;
5302         u8 level;
5303
5304         if (!acpi_ec_read(volume_offset, &level)) {
5305                 len += sprintf(p + len, "level:\t\tunreadable\n");
5306         } else {
5307                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5308                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5309                 len += sprintf(p + len, "commands:\tup, down, mute\n");
5310                 len += sprintf(p + len, "commands:\tlevel <level>"
5311                                " (<level> is 0-15)\n");
5312         }
5313
5314         return len;
5315 }
5316
5317 static int volume_write(char *buf)
5318 {
5319         int cmos_cmd, inc, i;
5320         u8 level, mute;
5321         int new_level, new_mute;
5322         char *cmd;
5323
5324         while ((cmd = next_cmd(&buf))) {
5325                 if (!acpi_ec_read(volume_offset, &level))
5326                         return -EIO;
5327                 new_mute = mute = level & 0x40;
5328                 new_level = level = level & 0xf;
5329
5330                 if (strlencmp(cmd, "up") == 0) {
5331                         if (mute)
5332                                 new_mute = 0;
5333                         else
5334                                 new_level = level == 15 ? 15 : level + 1;
5335                 } else if (strlencmp(cmd, "down") == 0) {
5336                         if (mute)
5337                                 new_mute = 0;
5338                         else
5339                                 new_level = level == 0 ? 0 : level - 1;
5340                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5341                            new_level >= 0 && new_level <= 15) {
5342                         /* new_level set */
5343                 } else if (strlencmp(cmd, "mute") == 0) {
5344                         new_mute = 0x40;
5345                 } else
5346                         return -EINVAL;
5347
5348                 if (new_level != level) {
5349                         /* mute doesn't change */
5350
5351                         cmos_cmd = (new_level > level) ?
5352                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5353                         inc = new_level > level ? 1 : -1;
5354
5355                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5356                                      !acpi_ec_write(volume_offset, level)))
5357                                 return -EIO;
5358
5359                         for (i = level; i != new_level; i += inc)
5360                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5361                                     !acpi_ec_write(volume_offset, i + inc))
5362                                         return -EIO;
5363
5364                         if (mute &&
5365                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5366                              !acpi_ec_write(volume_offset, new_level + mute))) {
5367                                 return -EIO;
5368                         }
5369                 }
5370
5371                 if (new_mute != mute) {
5372                         /* level doesn't change */
5373
5374                         cmos_cmd = (new_mute) ?
5375                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5376
5377                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
5378                             !acpi_ec_write(volume_offset, level + new_mute))
5379                                 return -EIO;
5380                 }
5381         }
5382
5383         return 0;
5384 }
5385
5386 static struct ibm_struct volume_driver_data = {
5387         .name = "volume",
5388         .read = volume_read,
5389         .write = volume_write,
5390 };
5391
5392 /*************************************************************************
5393  * Fan subdriver
5394  */
5395
5396 /*
5397  * FAN ACCESS MODES
5398  *
5399  * TPACPI_FAN_RD_ACPI_GFAN:
5400  *      ACPI GFAN method: returns fan level
5401  *
5402  *      see TPACPI_FAN_WR_ACPI_SFAN
5403  *      EC 0x2f (HFSP) not available if GFAN exists
5404  *
5405  * TPACPI_FAN_WR_ACPI_SFAN:
5406  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5407  *
5408  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5409  *      it for writing.
5410  *
5411  * TPACPI_FAN_WR_TPEC:
5412  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5413  *      Supported on almost all ThinkPads
5414  *
5415  *      Fan speed changes of any sort (including those caused by the
5416  *      disengaged mode) are usually done slowly by the firmware as the
5417  *      maximum ammount of fan duty cycle change per second seems to be
5418  *      limited.
5419  *
5420  *      Reading is not available if GFAN exists.
5421  *      Writing is not available if SFAN exists.
5422  *
5423  *      Bits
5424  *       7      automatic mode engaged;
5425  *              (default operation mode of the ThinkPad)
5426  *              fan level is ignored in this mode.
5427  *       6      full speed mode (takes precedence over bit 7);
5428  *              not available on all thinkpads.  May disable
5429  *              the tachometer while the fan controller ramps up
5430  *              the speed (which can take up to a few *minutes*).
5431  *              Speeds up fan to 100% duty-cycle, which is far above
5432  *              the standard RPM levels.  It is not impossible that
5433  *              it could cause hardware damage.
5434  *      5-3     unused in some models.  Extra bits for fan level
5435  *              in others, but still useless as all values above
5436  *              7 map to the same speed as level 7 in these models.
5437  *      2-0     fan level (0..7 usually)
5438  *                      0x00 = stop
5439  *                      0x07 = max (set when temperatures critical)
5440  *              Some ThinkPads may have other levels, see
5441  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5442  *
5443  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5444  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5445  *      does so, its initial value is meaningless (0x07).
5446  *
5447  *      For firmware bugs, refer to:
5448  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5449  *
5450  *      ----
5451  *
5452  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5453  *      Main fan tachometer reading (in RPM)
5454  *
5455  *      This register is present on all ThinkPads with a new-style EC, and
5456  *      it is known not to be present on the A21m/e, and T22, as there is
5457  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5458  *      ThinkPads from this same time period (and earlier) probably lack the
5459  *      tachometer as well.
5460  *
5461  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5462  *      was never fixed by IBM to report the EC firmware version string
5463  *      probably support the tachometer (like the early X models), so
5464  *      detecting it is quite hard.  We need more data to know for sure.
5465  *
5466  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5467  *      might result.
5468  *
5469  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5470  *      mode.
5471  *
5472  *      For firmware bugs, refer to:
5473  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5474  *
5475  * TPACPI_FAN_WR_ACPI_FANS:
5476  *      ThinkPad X31, X40, X41.  Not available in the X60.
5477  *
5478  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5479  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5480  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5481  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5482  *
5483  *      The speeds are stored on handles
5484  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5485  *
5486  *      There are three default speed sets, acessible as handles:
5487  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5488  *
5489  *      ACPI DSDT switches which set is in use depending on various
5490  *      factors.
5491  *
5492  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5493  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5494  *      but the ACPI tables just mention level 7.
5495  */
5496
5497 enum {                                  /* Fan control constants */
5498         fan_status_offset = 0x2f,       /* EC register 0x2f */
5499         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5500                                          * 0x84 must be read before 0x85 */
5501
5502         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5503         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5504
5505         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5506 };
5507
5508 enum fan_status_access_mode {
5509         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5510         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5511         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5512 };
5513
5514 enum fan_control_access_mode {
5515         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5516         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5517         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5518         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5519 };
5520
5521 enum fan_control_commands {
5522         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5523         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5524         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5525                                                  * and also watchdog cmd */
5526 };
5527
5528 static int fan_control_allowed;
5529
5530 static enum fan_status_access_mode fan_status_access_mode;
5531 static enum fan_control_access_mode fan_control_access_mode;
5532 static enum fan_control_commands fan_control_commands;
5533
5534 static u8 fan_control_initial_status;
5535 static u8 fan_control_desired_level;
5536 static u8 fan_control_resume_level;
5537 static int fan_watchdog_maxinterval;
5538
5539 static struct mutex fan_mutex;
5540
5541 static void fan_watchdog_fire(struct work_struct *ignored);
5542 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5543
5544 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5545 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5546            "\\FSPD",            /* 600e/x, 770e, 770x */
5547            );                   /* all others */
5548 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5549            "JFNS",              /* 770x-JL */
5550            );                   /* all others */
5551
5552 /*
5553  * Call with fan_mutex held
5554  */
5555 static void fan_update_desired_level(u8 status)
5556 {
5557         if ((status &
5558              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5559                 if (status > 7)
5560                         fan_control_desired_level = 7;
5561                 else
5562                         fan_control_desired_level = status;
5563         }
5564 }
5565
5566 static int fan_get_status(u8 *status)
5567 {
5568         u8 s;
5569
5570         /* TODO:
5571          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5572
5573         switch (fan_status_access_mode) {
5574         case TPACPI_FAN_RD_ACPI_GFAN:
5575                 /* 570, 600e/x, 770e, 770x */
5576
5577                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5578                         return -EIO;
5579
5580                 if (likely(status))
5581                         *status = s & 0x07;
5582
5583                 break;
5584
5585         case TPACPI_FAN_RD_TPEC:
5586                 /* all except 570, 600e/x, 770e, 770x */
5587                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5588                         return -EIO;
5589
5590                 if (likely(status))
5591                         *status = s;
5592
5593                 break;
5594
5595         default:
5596                 return -ENXIO;
5597         }
5598
5599         return 0;
5600 }
5601
5602 static int fan_get_status_safe(u8 *status)
5603 {
5604         int rc;
5605         u8 s;
5606
5607         if (mutex_lock_interruptible(&fan_mutex))
5608                 return -ERESTARTSYS;
5609         rc = fan_get_status(&s);
5610         if (!rc)
5611                 fan_update_desired_level(s);
5612         mutex_unlock(&fan_mutex);
5613
5614         if (status)
5615                 *status = s;
5616
5617         return rc;
5618 }
5619
5620 static int fan_get_speed(unsigned int *speed)
5621 {
5622         u8 hi, lo;
5623
5624         switch (fan_status_access_mode) {
5625         case TPACPI_FAN_RD_TPEC:
5626                 /* all except 570, 600e/x, 770e, 770x */
5627                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5628                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5629                         return -EIO;
5630
5631                 if (likely(speed))
5632                         *speed = (hi << 8) | lo;
5633
5634                 break;
5635
5636         default:
5637                 return -ENXIO;
5638         }
5639
5640         return 0;
5641 }
5642
5643 static int fan_set_level(int level)
5644 {
5645         if (!fan_control_allowed)
5646                 return -EPERM;
5647
5648         switch (fan_control_access_mode) {
5649         case TPACPI_FAN_WR_ACPI_SFAN:
5650                 if (level >= 0 && level <= 7) {
5651                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5652                                 return -EIO;
5653                 } else
5654                         return -EINVAL;
5655                 break;
5656
5657         case TPACPI_FAN_WR_ACPI_FANS:
5658         case TPACPI_FAN_WR_TPEC:
5659                 if (!(level & TP_EC_FAN_AUTO) &&
5660                     !(level & TP_EC_FAN_FULLSPEED) &&
5661                     ((level < 0) || (level > 7)))
5662                         return -EINVAL;
5663
5664                 /* safety net should the EC not support AUTO
5665                  * or FULLSPEED mode bits and just ignore them */
5666                 if (level & TP_EC_FAN_FULLSPEED)
5667                         level |= 7;     /* safety min speed 7 */
5668                 else if (level & TP_EC_FAN_AUTO)
5669                         level |= 4;     /* safety min speed 4 */
5670
5671                 if (!acpi_ec_write(fan_status_offset, level))
5672                         return -EIO;
5673                 else
5674                         tp_features.fan_ctrl_status_undef = 0;
5675                 break;
5676
5677         default:
5678                 return -ENXIO;
5679         }
5680         return 0;
5681 }
5682
5683 static int fan_set_level_safe(int level)
5684 {
5685         int rc;
5686
5687         if (!fan_control_allowed)
5688                 return -EPERM;
5689
5690         if (mutex_lock_interruptible(&fan_mutex))
5691                 return -ERESTARTSYS;
5692
5693         if (level == TPACPI_FAN_LAST_LEVEL)
5694                 level = fan_control_desired_level;
5695
5696         rc = fan_set_level(level);
5697         if (!rc)
5698                 fan_update_desired_level(level);
5699
5700         mutex_unlock(&fan_mutex);
5701         return rc;
5702 }
5703
5704 static int fan_set_enable(void)
5705 {
5706         u8 s;
5707         int rc;
5708
5709         if (!fan_control_allowed)
5710                 return -EPERM;
5711
5712         if (mutex_lock_interruptible(&fan_mutex))
5713                 return -ERESTARTSYS;
5714
5715         switch (fan_control_access_mode) {
5716         case TPACPI_FAN_WR_ACPI_FANS:
5717         case TPACPI_FAN_WR_TPEC:
5718                 rc = fan_get_status(&s);
5719                 if (rc < 0)
5720                         break;
5721
5722                 /* Don't go out of emergency fan mode */
5723                 if (s != 7) {
5724                         s &= 0x07;
5725                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5726                 }
5727
5728                 if (!acpi_ec_write(fan_status_offset, s))
5729                         rc = -EIO;
5730                 else {
5731                         tp_features.fan_ctrl_status_undef = 0;
5732                         rc = 0;
5733                 }
5734                 break;
5735
5736         case TPACPI_FAN_WR_ACPI_SFAN:
5737                 rc = fan_get_status(&s);
5738                 if (rc < 0)
5739                         break;
5740
5741                 s &= 0x07;
5742
5743                 /* Set fan to at least level 4 */
5744                 s |= 4;
5745
5746                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5747                         rc = -EIO;
5748                 else
5749                         rc = 0;
5750                 break;
5751
5752         default:
5753                 rc = -ENXIO;
5754         }
5755
5756         mutex_unlock(&fan_mutex);
5757         return rc;
5758 }
5759
5760 static int fan_set_disable(void)
5761 {
5762         int rc;
5763
5764         if (!fan_control_allowed)
5765                 return -EPERM;
5766
5767         if (mutex_lock_interruptible(&fan_mutex))
5768                 return -ERESTARTSYS;
5769
5770         rc = 0;
5771         switch (fan_control_access_mode) {
5772         case TPACPI_FAN_WR_ACPI_FANS:
5773         case TPACPI_FAN_WR_TPEC:
5774                 if (!acpi_ec_write(fan_status_offset, 0x00))
5775                         rc = -EIO;
5776                 else {
5777                         fan_control_desired_level = 0;
5778                         tp_features.fan_ctrl_status_undef = 0;
5779                 }
5780                 break;
5781
5782         case TPACPI_FAN_WR_ACPI_SFAN:
5783                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5784                         rc = -EIO;
5785                 else
5786                         fan_control_desired_level = 0;
5787                 break;
5788
5789         default:
5790                 rc = -ENXIO;
5791         }
5792
5793
5794         mutex_unlock(&fan_mutex);
5795         return rc;
5796 }
5797
5798 static int fan_set_speed(int speed)
5799 {
5800         int rc;
5801
5802         if (!fan_control_allowed)
5803                 return -EPERM;
5804
5805         if (mutex_lock_interruptible(&fan_mutex))
5806                 return -ERESTARTSYS;
5807
5808         rc = 0;
5809         switch (fan_control_access_mode) {
5810         case TPACPI_FAN_WR_ACPI_FANS:
5811                 if (speed >= 0 && speed <= 65535) {
5812                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5813                                         speed, speed, speed))
5814                                 rc = -EIO;
5815                 } else
5816                         rc = -EINVAL;
5817                 break;
5818
5819         default:
5820                 rc = -ENXIO;
5821         }
5822
5823         mutex_unlock(&fan_mutex);
5824         return rc;
5825 }
5826
5827 static void fan_watchdog_reset(void)
5828 {
5829         static int fan_watchdog_active;
5830
5831         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5832                 return;
5833
5834         if (fan_watchdog_active)
5835                 cancel_delayed_work(&fan_watchdog_task);
5836
5837         if (fan_watchdog_maxinterval > 0 &&
5838             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5839                 fan_watchdog_active = 1;
5840                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5841                                 msecs_to_jiffies(fan_watchdog_maxinterval
5842                                                  * 1000))) {
5843                         printk(TPACPI_ERR
5844                                "failed to queue the fan watchdog, "
5845                                "watchdog will not trigger\n");
5846                 }
5847         } else
5848                 fan_watchdog_active = 0;
5849 }
5850
5851 static void fan_watchdog_fire(struct work_struct *ignored)
5852 {
5853         int rc;
5854
5855         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5856                 return;
5857
5858         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5859         rc = fan_set_enable();
5860         if (rc < 0) {
5861                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5862                         "will try again later...\n", -rc);
5863                 /* reschedule for later */
5864                 fan_watchdog_reset();
5865         }
5866 }
5867
5868 /*
5869  * SYSFS fan layout: hwmon compatible (device)
5870  *
5871  * pwm*_enable:
5872  *      0: "disengaged" mode
5873  *      1: manual mode
5874  *      2: native EC "auto" mode (recommended, hardware default)
5875  *
5876  * pwm*: set speed in manual mode, ignored otherwise.
5877  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5878  *      interpolation.
5879  *
5880  * fan*_input: tachometer reading, RPM
5881  *
5882  *
5883  * SYSFS fan layout: extensions
5884  *
5885  * fan_watchdog (driver):
5886  *      fan watchdog interval in seconds, 0 disables (default), max 120
5887  */
5888
5889 /* sysfs fan pwm1_enable ----------------------------------------------- */
5890 static ssize_t fan_pwm1_enable_show(struct device *dev,
5891                                     struct device_attribute *attr,
5892                                     char *buf)
5893 {
5894         int res, mode;
5895         u8 status;
5896
5897         res = fan_get_status_safe(&status);
5898         if (res)
5899                 return res;
5900
5901         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5902                 if (status != fan_control_initial_status) {
5903                         tp_features.fan_ctrl_status_undef = 0;
5904                 } else {
5905                         /* Return most likely status. In fact, it
5906                          * might be the only possible status */
5907                         status = TP_EC_FAN_AUTO;
5908                 }
5909         }
5910
5911         if (status & TP_EC_FAN_FULLSPEED) {
5912                 mode = 0;
5913         } else if (status & TP_EC_FAN_AUTO) {
5914                 mode = 2;
5915         } else
5916                 mode = 1;
5917
5918         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5919 }
5920
5921 static ssize_t fan_pwm1_enable_store(struct device *dev,
5922                                      struct device_attribute *attr,
5923                                      const char *buf, size_t count)
5924 {
5925         unsigned long t;
5926         int res, level;
5927
5928         if (parse_strtoul(buf, 2, &t))
5929                 return -EINVAL;
5930
5931         switch (t) {
5932         case 0:
5933                 level = TP_EC_FAN_FULLSPEED;
5934                 break;
5935         case 1:
5936                 level = TPACPI_FAN_LAST_LEVEL;
5937                 break;
5938         case 2:
5939                 level = TP_EC_FAN_AUTO;
5940                 break;
5941         case 3:
5942                 /* reserved for software-controlled auto mode */
5943                 return -ENOSYS;
5944         default:
5945                 return -EINVAL;
5946         }
5947
5948         res = fan_set_level_safe(level);
5949         if (res == -ENXIO)
5950                 return -EINVAL;
5951         else if (res < 0)
5952                 return res;
5953
5954         fan_watchdog_reset();
5955
5956         return count;
5957 }
5958
5959 static struct device_attribute dev_attr_fan_pwm1_enable =
5960         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5961                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5962
5963 /* sysfs fan pwm1 ------------------------------------------------------ */
5964 static ssize_t fan_pwm1_show(struct device *dev,
5965                              struct device_attribute *attr,
5966                              char *buf)
5967 {
5968         int res;
5969         u8 status;
5970
5971         res = fan_get_status_safe(&status);
5972         if (res)
5973                 return res;
5974
5975         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5976                 if (status != fan_control_initial_status) {
5977                         tp_features.fan_ctrl_status_undef = 0;
5978                 } else {
5979                         status = TP_EC_FAN_AUTO;
5980                 }
5981         }
5982
5983         if ((status &
5984              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5985                 status = fan_control_desired_level;
5986
5987         if (status > 7)
5988                 status = 7;
5989
5990         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5991 }
5992
5993 static ssize_t fan_pwm1_store(struct device *dev,
5994                               struct device_attribute *attr,
5995                               const char *buf, size_t count)
5996 {
5997         unsigned long s;
5998         int rc;
5999         u8 status, newlevel;
6000
6001         if (parse_strtoul(buf, 255, &s))
6002                 return -EINVAL;
6003
6004         /* scale down from 0-255 to 0-7 */
6005         newlevel = (s >> 5) & 0x07;
6006
6007         if (mutex_lock_interruptible(&fan_mutex))
6008                 return -ERESTARTSYS;
6009
6010         rc = fan_get_status(&status);
6011         if (!rc && (status &
6012                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6013                 rc = fan_set_level(newlevel);
6014                 if (rc == -ENXIO)
6015                         rc = -EINVAL;
6016                 else if (!rc) {
6017                         fan_update_desired_level(newlevel);
6018                         fan_watchdog_reset();
6019                 }
6020         }
6021
6022         mutex_unlock(&fan_mutex);
6023         return (rc)? rc : count;
6024 }
6025
6026 static struct device_attribute dev_attr_fan_pwm1 =
6027         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6028                 fan_pwm1_show, fan_pwm1_store);
6029
6030 /* sysfs fan fan1_input ------------------------------------------------ */
6031 static ssize_t fan_fan1_input_show(struct device *dev,
6032                            struct device_attribute *attr,
6033                            char *buf)
6034 {
6035         int res;
6036         unsigned int speed;
6037
6038         res = fan_get_speed(&speed);
6039         if (res < 0)
6040                 return res;
6041
6042         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6043 }
6044
6045 static struct device_attribute dev_attr_fan_fan1_input =
6046         __ATTR(fan1_input, S_IRUGO,
6047                 fan_fan1_input_show, NULL);
6048
6049 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6050 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6051                                      char *buf)
6052 {
6053         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6054 }
6055
6056 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6057                                       const char *buf, size_t count)
6058 {
6059         unsigned long t;
6060
6061         if (parse_strtoul(buf, 120, &t))
6062                 return -EINVAL;
6063
6064         if (!fan_control_allowed)
6065                 return -EPERM;
6066
6067         fan_watchdog_maxinterval = t;
6068         fan_watchdog_reset();
6069
6070         return count;
6071 }
6072
6073 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6074                 fan_fan_watchdog_show, fan_fan_watchdog_store);
6075
6076 /* --------------------------------------------------------------------- */
6077 static struct attribute *fan_attributes[] = {
6078         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6079         &dev_attr_fan_fan1_input.attr,
6080         NULL
6081 };
6082
6083 static const struct attribute_group fan_attr_group = {
6084         .attrs = fan_attributes,
6085 };
6086
6087 static int __init fan_init(struct ibm_init_struct *iibm)
6088 {
6089         int rc;
6090
6091         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6092
6093         mutex_init(&fan_mutex);
6094         fan_status_access_mode = TPACPI_FAN_NONE;
6095         fan_control_access_mode = TPACPI_FAN_WR_NONE;
6096         fan_control_commands = 0;
6097         fan_watchdog_maxinterval = 0;
6098         tp_features.fan_ctrl_status_undef = 0;
6099         fan_control_desired_level = 7;
6100
6101         TPACPI_ACPIHANDLE_INIT(fans);
6102         TPACPI_ACPIHANDLE_INIT(gfan);
6103         TPACPI_ACPIHANDLE_INIT(sfan);
6104
6105         if (gfan_handle) {
6106                 /* 570, 600e/x, 770e, 770x */
6107                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6108         } else {
6109                 /* all other ThinkPads: note that even old-style
6110                  * ThinkPad ECs supports the fan control register */
6111                 if (likely(acpi_ec_read(fan_status_offset,
6112                                         &fan_control_initial_status))) {
6113                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6114
6115                         /* In some ThinkPads, neither the EC nor the ACPI
6116                          * DSDT initialize the fan status, and it ends up
6117                          * being set to 0x07 when it *could* be either
6118                          * 0x07 or 0x80.
6119                          *
6120                          * Enable for TP-1Y (T43), TP-78 (R51e),
6121                          * TP-76 (R52), TP-70 (T43, R52), which are known
6122                          * to be buggy. */
6123                         if (fan_control_initial_status == 0x07) {
6124                                 switch (thinkpad_id.ec_model) {
6125                                 case 0x5931: /* TP-1Y */
6126                                 case 0x3837: /* TP-78 */
6127                                 case 0x3637: /* TP-76 */
6128                                 case 0x3037: /* TP-70 */
6129                                         printk(TPACPI_NOTICE
6130                                                "fan_init: initial fan status "
6131                                                "is unknown, assuming it is "
6132                                                "in auto mode\n");
6133                                         tp_features.fan_ctrl_status_undef = 1;
6134                                         ;;
6135                                 }
6136                         }
6137                 } else {
6138                         printk(TPACPI_ERR
6139                                "ThinkPad ACPI EC access misbehaving, "
6140                                "fan status and control unavailable\n");
6141                         return 1;
6142                 }
6143         }
6144
6145         if (sfan_handle) {
6146                 /* 570, 770x-JL */
6147                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6148                 fan_control_commands |=
6149                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6150         } else {
6151                 if (!gfan_handle) {
6152                         /* gfan without sfan means no fan control */
6153                         /* all other models implement TP EC 0x2f control */
6154
6155                         if (fans_handle) {
6156                                 /* X31, X40, X41 */
6157                                 fan_control_access_mode =
6158                                     TPACPI_FAN_WR_ACPI_FANS;
6159                                 fan_control_commands |=
6160                                     TPACPI_FAN_CMD_SPEED |
6161                                     TPACPI_FAN_CMD_LEVEL |
6162                                     TPACPI_FAN_CMD_ENABLE;
6163                         } else {
6164                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6165                                 fan_control_commands |=
6166                                     TPACPI_FAN_CMD_LEVEL |
6167                                     TPACPI_FAN_CMD_ENABLE;
6168                         }
6169                 }
6170         }
6171
6172         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6173                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6174                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
6175                 fan_status_access_mode, fan_control_access_mode);
6176
6177         /* fan control master switch */
6178         if (!fan_control_allowed) {
6179                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6180                 fan_control_commands = 0;
6181                 dbg_printk(TPACPI_DBG_INIT,
6182                            "fan control features disabled by parameter\n");
6183         }
6184
6185         /* update fan_control_desired_level */
6186         if (fan_status_access_mode != TPACPI_FAN_NONE)
6187                 fan_get_status_safe(NULL);
6188
6189         if (fan_status_access_mode != TPACPI_FAN_NONE ||
6190             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6191                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6192                                          &fan_attr_group);
6193                 if (rc < 0)
6194                         return rc;
6195
6196                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6197                                         &driver_attr_fan_watchdog);
6198                 if (rc < 0) {
6199                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6200                                         &fan_attr_group);
6201                         return rc;
6202                 }
6203                 return 0;
6204         } else
6205                 return 1;
6206 }
6207
6208 static void fan_exit(void)
6209 {
6210         vdbg_printk(TPACPI_DBG_EXIT,
6211                     "cancelling any pending fan watchdog tasks\n");
6212
6213         /* FIXME: can we really do this unconditionally? */
6214         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6215         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6216                            &driver_attr_fan_watchdog);
6217
6218         cancel_delayed_work(&fan_watchdog_task);
6219         flush_workqueue(tpacpi_wq);
6220 }
6221
6222 static void fan_suspend(pm_message_t state)
6223 {
6224         int rc;
6225
6226         if (!fan_control_allowed)
6227                 return;
6228
6229         /* Store fan status in cache */
6230         fan_control_resume_level = 0;
6231         rc = fan_get_status_safe(&fan_control_resume_level);
6232         if (rc < 0)
6233                 printk(TPACPI_NOTICE
6234                         "failed to read fan level for later "
6235                         "restore during resume: %d\n", rc);
6236
6237         /* if it is undefined, don't attempt to restore it.
6238          * KEEP THIS LAST */
6239         if (tp_features.fan_ctrl_status_undef)
6240                 fan_control_resume_level = 0;
6241 }
6242
6243 static void fan_resume(void)
6244 {
6245         u8 current_level = 7;
6246         bool do_set = false;
6247         int rc;
6248
6249         /* DSDT *always* updates status on resume */
6250         tp_features.fan_ctrl_status_undef = 0;
6251
6252         if (!fan_control_allowed ||
6253             !fan_control_resume_level ||
6254             (fan_get_status_safe(&current_level) < 0))
6255                 return;
6256
6257         switch (fan_control_access_mode) {
6258         case TPACPI_FAN_WR_ACPI_SFAN:
6259                 /* never decrease fan level */
6260                 do_set = (fan_control_resume_level > current_level);
6261                 break;
6262         case TPACPI_FAN_WR_ACPI_FANS:
6263         case TPACPI_FAN_WR_TPEC:
6264                 /* never decrease fan level, scale is:
6265                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6266                  *
6267                  * We expect the firmware to set either 7 or AUTO, but we
6268                  * handle FULLSPEED out of paranoia.
6269                  *
6270                  * So, we can safely only restore FULLSPEED or 7, anything
6271                  * else could slow the fan.  Restoring AUTO is useless, at
6272                  * best that's exactly what the DSDT already set (it is the
6273                  * slower it uses).
6274                  *
6275                  * Always keep in mind that the DSDT *will* have set the
6276                  * fans to what the vendor supposes is the best level.  We
6277                  * muck with it only to speed the fan up.
6278                  */
6279                 if (fan_control_resume_level != 7 &&
6280                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6281                         return;
6282                 else
6283                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6284                                  (current_level != fan_control_resume_level);
6285                 break;
6286         default:
6287                 return;
6288         }
6289         if (do_set) {
6290                 printk(TPACPI_NOTICE
6291                         "restoring fan level to 0x%02x\n",
6292                         fan_control_resume_level);
6293                 rc = fan_set_level_safe(fan_control_resume_level);
6294                 if (rc < 0)
6295                         printk(TPACPI_NOTICE
6296                                 "failed to restore fan level: %d\n", rc);
6297         }
6298 }
6299
6300 static int fan_read(char *p)
6301 {
6302         int len = 0;
6303         int rc;
6304         u8 status;
6305         unsigned int speed = 0;
6306
6307         switch (fan_status_access_mode) {
6308         case TPACPI_FAN_RD_ACPI_GFAN:
6309                 /* 570, 600e/x, 770e, 770x */
6310                 rc = fan_get_status_safe(&status);
6311                 if (rc < 0)
6312                         return rc;
6313
6314                 len += sprintf(p + len, "status:\t\t%s\n"
6315                                "level:\t\t%d\n",
6316                                (status != 0) ? "enabled" : "disabled", status);
6317                 break;
6318
6319         case TPACPI_FAN_RD_TPEC:
6320                 /* all except 570, 600e/x, 770e, 770x */
6321                 rc = fan_get_status_safe(&status);
6322                 if (rc < 0)
6323                         return rc;
6324
6325                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
6326                         if (status != fan_control_initial_status)
6327                                 tp_features.fan_ctrl_status_undef = 0;
6328                         else
6329                                 /* Return most likely status. In fact, it
6330                                  * might be the only possible status */
6331                                 status = TP_EC_FAN_AUTO;
6332                 }
6333
6334                 len += sprintf(p + len, "status:\t\t%s\n",
6335                                (status != 0) ? "enabled" : "disabled");
6336
6337                 rc = fan_get_speed(&speed);
6338                 if (rc < 0)
6339                         return rc;
6340
6341                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6342
6343                 if (status & TP_EC_FAN_FULLSPEED)
6344                         /* Disengaged mode takes precedence */
6345                         len += sprintf(p + len, "level:\t\tdisengaged\n");
6346                 else if (status & TP_EC_FAN_AUTO)
6347                         len += sprintf(p + len, "level:\t\tauto\n");
6348                 else
6349                         len += sprintf(p + len, "level:\t\t%d\n", status);
6350                 break;
6351
6352         case TPACPI_FAN_NONE:
6353         default:
6354                 len += sprintf(p + len, "status:\t\tnot supported\n");
6355         }
6356
6357         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6358                 len += sprintf(p + len, "commands:\tlevel <level>");
6359
6360                 switch (fan_control_access_mode) {
6361                 case TPACPI_FAN_WR_ACPI_SFAN:
6362                         len += sprintf(p + len, " (<level> is 0-7)\n");
6363                         break;
6364
6365                 default:
6366                         len += sprintf(p + len, " (<level> is 0-7, "
6367                                        "auto, disengaged, full-speed)\n");
6368                         break;
6369                 }
6370         }
6371
6372         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6373                 len += sprintf(p + len, "commands:\tenable, disable\n"
6374                                "commands:\twatchdog <timeout> (<timeout> "
6375                                "is 0 (off), 1-120 (seconds))\n");
6376
6377         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6378                 len += sprintf(p + len, "commands:\tspeed <speed>"
6379                                " (<speed> is 0-65535)\n");
6380
6381         return len;
6382 }
6383
6384 static int fan_write_cmd_level(const char *cmd, int *rc)
6385 {
6386         int level;
6387
6388         if (strlencmp(cmd, "level auto") == 0)
6389                 level = TP_EC_FAN_AUTO;
6390         else if ((strlencmp(cmd, "level disengaged") == 0) |
6391                         (strlencmp(cmd, "level full-speed") == 0))
6392                 level = TP_EC_FAN_FULLSPEED;
6393         else if (sscanf(cmd, "level %d", &level) != 1)
6394                 return 0;
6395
6396         *rc = fan_set_level_safe(level);
6397         if (*rc == -ENXIO)
6398                 printk(TPACPI_ERR "level command accepted for unsupported "
6399                        "access mode %d", fan_control_access_mode);
6400
6401         return 1;
6402 }
6403
6404 static int fan_write_cmd_enable(const char *cmd, int *rc)
6405 {
6406         if (strlencmp(cmd, "enable") != 0)
6407                 return 0;
6408
6409         *rc = fan_set_enable();
6410         if (*rc == -ENXIO)
6411                 printk(TPACPI_ERR "enable command accepted for unsupported "
6412                        "access mode %d", fan_control_access_mode);
6413
6414         return 1;
6415 }
6416
6417 static int fan_write_cmd_disable(const char *cmd, int *rc)
6418 {
6419         if (strlencmp(cmd, "disable") != 0)
6420                 return 0;
6421
6422         *rc = fan_set_disable();
6423         if (*rc == -ENXIO)
6424                 printk(TPACPI_ERR "disable command accepted for unsupported "
6425                        "access mode %d", fan_control_access_mode);
6426
6427         return 1;
6428 }
6429
6430 static int fan_write_cmd_speed(const char *cmd, int *rc)
6431 {
6432         int speed;
6433
6434         /* TODO:
6435          * Support speed <low> <medium> <high> ? */
6436
6437         if (sscanf(cmd, "speed %d", &speed) != 1)
6438                 return 0;
6439
6440         *rc = fan_set_speed(speed);
6441         if (*rc == -ENXIO)
6442                 printk(TPACPI_ERR "speed command accepted for unsupported "
6443                        "access mode %d", fan_control_access_mode);
6444
6445         return 1;
6446 }
6447
6448 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6449 {
6450         int interval;
6451
6452         if (sscanf(cmd, "watchdog %d", &interval) != 1)
6453                 return 0;
6454
6455         if (interval < 0 || interval > 120)
6456                 *rc = -EINVAL;
6457         else
6458                 fan_watchdog_maxinterval = interval;
6459
6460         return 1;
6461 }
6462
6463 static int fan_write(char *buf)
6464 {
6465         char *cmd;
6466         int rc = 0;
6467
6468         while (!rc && (cmd = next_cmd(&buf))) {
6469                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6470                       fan_write_cmd_level(cmd, &rc)) &&
6471                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6472                       (fan_write_cmd_enable(cmd, &rc) ||
6473                        fan_write_cmd_disable(cmd, &rc) ||
6474                        fan_write_cmd_watchdog(cmd, &rc))) &&
6475                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6476                       fan_write_cmd_speed(cmd, &rc))
6477                     )
6478                         rc = -EINVAL;
6479                 else if (!rc)
6480                         fan_watchdog_reset();
6481         }
6482
6483         return rc;
6484 }
6485
6486 static struct ibm_struct fan_driver_data = {
6487         .name = "fan",
6488         .read = fan_read,
6489         .write = fan_write,
6490         .exit = fan_exit,
6491         .suspend = fan_suspend,
6492         .resume = fan_resume,
6493 };
6494
6495 /****************************************************************************
6496  ****************************************************************************
6497  *
6498  * Infrastructure
6499  *
6500  ****************************************************************************
6501  ****************************************************************************/
6502
6503 /* sysfs name ---------------------------------------------------------- */
6504 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6505                            struct device_attribute *attr,
6506                            char *buf)
6507 {
6508         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6509 }
6510
6511 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6512         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6513
6514 /* --------------------------------------------------------------------- */
6515
6516 /* /proc support */
6517 static struct proc_dir_entry *proc_dir;
6518
6519 /*
6520  * Module and infrastructure proble, init and exit handling
6521  */
6522
6523 static int force_load;
6524
6525 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6526 static const char * __init str_supported(int is_supported)
6527 {
6528         static char text_unsupported[] __initdata = "not supported";
6529
6530         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6531 }
6532 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6533
6534 static void ibm_exit(struct ibm_struct *ibm)
6535 {
6536         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6537
6538         list_del_init(&ibm->all_drivers);
6539
6540         if (ibm->flags.acpi_notify_installed) {
6541                 dbg_printk(TPACPI_DBG_EXIT,
6542                         "%s: acpi_remove_notify_handler\n", ibm->name);
6543                 BUG_ON(!ibm->acpi);
6544                 acpi_remove_notify_handler(*ibm->acpi->handle,
6545                                            ibm->acpi->type,
6546                                            dispatch_acpi_notify);
6547                 ibm->flags.acpi_notify_installed = 0;
6548                 ibm->flags.acpi_notify_installed = 0;
6549         }
6550
6551         if (ibm->flags.proc_created) {
6552                 dbg_printk(TPACPI_DBG_EXIT,
6553                         "%s: remove_proc_entry\n", ibm->name);
6554                 remove_proc_entry(ibm->name, proc_dir);
6555                 ibm->flags.proc_created = 0;
6556         }
6557
6558         if (ibm->flags.acpi_driver_registered) {
6559                 dbg_printk(TPACPI_DBG_EXIT,
6560                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6561                 BUG_ON(!ibm->acpi);
6562                 acpi_bus_unregister_driver(ibm->acpi->driver);
6563                 kfree(ibm->acpi->driver);
6564                 ibm->acpi->driver = NULL;
6565                 ibm->flags.acpi_driver_registered = 0;
6566         }
6567
6568         if (ibm->flags.init_called && ibm->exit) {
6569                 ibm->exit();
6570                 ibm->flags.init_called = 0;
6571         }
6572
6573         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6574 }
6575
6576 static int __init ibm_init(struct ibm_init_struct *iibm)
6577 {
6578         int ret;
6579         struct ibm_struct *ibm = iibm->data;
6580         struct proc_dir_entry *entry;
6581
6582         BUG_ON(ibm == NULL);
6583
6584         INIT_LIST_HEAD(&ibm->all_drivers);
6585
6586         if (ibm->flags.experimental && !experimental)
6587                 return 0;
6588
6589         dbg_printk(TPACPI_DBG_INIT,
6590                 "probing for %s\n", ibm->name);
6591
6592         if (iibm->init) {
6593                 ret = iibm->init(iibm);
6594                 if (ret > 0)
6595                         return 0;       /* probe failed */
6596                 if (ret)
6597                         return ret;
6598
6599                 ibm->flags.init_called = 1;
6600         }
6601
6602         if (ibm->acpi) {
6603                 if (ibm->acpi->hid) {
6604                         ret = register_tpacpi_subdriver(ibm);
6605                         if (ret)
6606                                 goto err_out;
6607                 }
6608
6609                 if (ibm->acpi->notify) {
6610                         ret = setup_acpi_notify(ibm);
6611                         if (ret == -ENODEV) {
6612                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6613                                         ibm->name);
6614                                 ret = 0;
6615                                 goto err_out;
6616                         }
6617                         if (ret < 0)
6618                                 goto err_out;
6619                 }
6620         }
6621
6622         dbg_printk(TPACPI_DBG_INIT,
6623                 "%s installed\n", ibm->name);
6624
6625         if (ibm->read) {
6626                 entry = create_proc_entry(ibm->name,
6627                                           S_IFREG | S_IRUGO | S_IWUSR,
6628                                           proc_dir);
6629                 if (!entry) {
6630                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6631                                ibm->name);
6632                         ret = -ENODEV;
6633                         goto err_out;
6634                 }
6635                 entry->owner = THIS_MODULE;
6636                 entry->data = ibm;
6637                 entry->read_proc = &dispatch_procfs_read;
6638                 if (ibm->write)
6639                         entry->write_proc = &dispatch_procfs_write;
6640                 ibm->flags.proc_created = 1;
6641         }
6642
6643         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6644
6645         return 0;
6646
6647 err_out:
6648         dbg_printk(TPACPI_DBG_INIT,
6649                 "%s: at error exit path with result %d\n",
6650                 ibm->name, ret);
6651
6652         ibm_exit(ibm);
6653         return (ret < 0)? ret : 0;
6654 }
6655
6656 /* Probing */
6657
6658 /* returns 0 - probe ok, or < 0 - probe error.
6659  * Probe ok doesn't mean thinkpad found.
6660  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
6661 static int __must_check __init get_thinkpad_model_data(
6662                                                 struct thinkpad_id_data *tp)
6663 {
6664         const struct dmi_device *dev = NULL;
6665         char ec_fw_string[18];
6666         char const *s;
6667
6668         if (!tp)
6669                 return -EINVAL;
6670
6671         memset(tp, 0, sizeof(*tp));
6672
6673         if (dmi_name_in_vendors("IBM"))
6674                 tp->vendor = PCI_VENDOR_ID_IBM;
6675         else if (dmi_name_in_vendors("LENOVO"))
6676                 tp->vendor = PCI_VENDOR_ID_LENOVO;
6677         else
6678                 return 0;
6679
6680         s = dmi_get_system_info(DMI_BIOS_VERSION);
6681         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
6682         if (s && !tp->bios_version_str)
6683                 return -ENOMEM;
6684         if (!tp->bios_version_str)
6685                 return 0;
6686         tp->bios_model = tp->bios_version_str[0]
6687                          | (tp->bios_version_str[1] << 8);
6688
6689         /*
6690          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6691          * X32 or newer, all Z series;  Some models must have an
6692          * up-to-date BIOS or they will not be detected.
6693          *
6694          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6695          */
6696         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6697                 if (sscanf(dev->name,
6698                            "IBM ThinkPad Embedded Controller -[%17c",
6699                            ec_fw_string) == 1) {
6700                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6701                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6702
6703                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6704                         if (!tp->ec_version_str)
6705                                 return -ENOMEM;
6706                         tp->ec_model = ec_fw_string[0]
6707                                         | (ec_fw_string[1] << 8);
6708                         break;
6709                 }
6710         }
6711
6712         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
6713         if (s && !strnicmp(s, "ThinkPad", 8)) {
6714                 tp->model_str = kstrdup(s, GFP_KERNEL);
6715                 if (!tp->model_str)
6716                         return -ENOMEM;
6717         }
6718
6719         s = dmi_get_system_info(DMI_PRODUCT_NAME);
6720         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
6721         if (s && !tp->nummodel_str)
6722                 return -ENOMEM;
6723
6724         return 0;
6725 }
6726
6727 static int __init probe_for_thinkpad(void)
6728 {
6729         int is_thinkpad;
6730
6731         if (acpi_disabled)
6732                 return -ENODEV;
6733
6734         /*
6735          * Non-ancient models have better DMI tagging, but very old models
6736          * don't.
6737          */
6738         is_thinkpad = (thinkpad_id.model_str != NULL);
6739
6740         /* ec is required because many other handles are relative to it */
6741         TPACPI_ACPIHANDLE_INIT(ec);
6742         if (!ec_handle) {
6743                 if (is_thinkpad)
6744                         printk(TPACPI_ERR
6745                                 "Not yet supported ThinkPad detected!\n");
6746                 return -ENODEV;
6747         }
6748
6749         /*
6750          * Risks a regression on very old machines, but reduces potential
6751          * false positives a damn great deal
6752          */
6753         if (!is_thinkpad)
6754                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6755
6756         if (!is_thinkpad && !force_load)
6757                 return -ENODEV;
6758
6759         return 0;
6760 }
6761
6762
6763 /* Module init, exit, parameters */
6764
6765 static struct ibm_init_struct ibms_init[] __initdata = {
6766         {
6767                 .init = thinkpad_acpi_driver_init,
6768                 .data = &thinkpad_acpi_driver_data,
6769         },
6770         {
6771                 .init = hotkey_init,
6772                 .data = &hotkey_driver_data,
6773         },
6774         {
6775                 .init = bluetooth_init,
6776                 .data = &bluetooth_driver_data,
6777         },
6778         {
6779                 .init = wan_init,
6780                 .data = &wan_driver_data,
6781         },
6782 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6783         {
6784                 .init = video_init,
6785                 .data = &video_driver_data,
6786         },
6787 #endif
6788         {
6789                 .init = light_init,
6790                 .data = &light_driver_data,
6791         },
6792 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6793         {
6794                 .init = dock_init,
6795                 .data = &dock_driver_data[0],
6796         },
6797         {
6798                 .init = dock_init2,
6799                 .data = &dock_driver_data[1],
6800         },
6801 #endif
6802 #ifdef CONFIG_THINKPAD_ACPI_BAY
6803         {
6804                 .init = bay_init,
6805                 .data = &bay_driver_data,
6806         },
6807 #endif
6808         {
6809                 .init = cmos_init,
6810                 .data = &cmos_driver_data,
6811         },
6812         {
6813                 .init = led_init,
6814                 .data = &led_driver_data,
6815         },
6816         {
6817                 .init = beep_init,
6818                 .data = &beep_driver_data,
6819         },
6820         {
6821                 .init = thermal_init,
6822                 .data = &thermal_driver_data,
6823         },
6824         {
6825                 .data = &ecdump_driver_data,
6826         },
6827         {
6828                 .init = brightness_init,
6829                 .data = &brightness_driver_data,
6830         },
6831         {
6832                 .data = &volume_driver_data,
6833         },
6834         {
6835                 .init = fan_init,
6836                 .data = &fan_driver_data,
6837         },
6838 };
6839
6840 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6841 {
6842         unsigned int i;
6843         struct ibm_struct *ibm;
6844
6845         if (!kp || !kp->name || !val)
6846                 return -EINVAL;
6847
6848         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6849                 ibm = ibms_init[i].data;
6850                 WARN_ON(ibm == NULL);
6851
6852                 if (!ibm || !ibm->name)
6853                         continue;
6854
6855                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6856                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6857                                 return -ENOSPC;
6858                         strcpy(ibms_init[i].param, val);
6859                         strcat(ibms_init[i].param, ",");
6860                         return 0;
6861                 }
6862         }
6863
6864         return -EINVAL;
6865 }
6866
6867 module_param(experimental, int, 0);
6868 MODULE_PARM_DESC(experimental,
6869                  "Enables experimental features when non-zero");
6870
6871 module_param_named(debug, dbg_level, uint, 0);
6872 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6873
6874 module_param(force_load, bool, 0);
6875 MODULE_PARM_DESC(force_load,
6876                  "Attempts to load the driver even on a "
6877                  "mis-identified ThinkPad when true");
6878
6879 module_param_named(fan_control, fan_control_allowed, bool, 0);
6880 MODULE_PARM_DESC(fan_control,
6881                  "Enables setting fan parameters features when true");
6882
6883 module_param_named(brightness_mode, brightness_mode, int, 0);
6884 MODULE_PARM_DESC(brightness_mode,
6885                  "Selects brightness control strategy: "
6886                  "0=auto, 1=EC, 2=CMOS, 3=both");
6887
6888 module_param(brightness_enable, uint, 0);
6889 MODULE_PARM_DESC(brightness_enable,
6890                  "Enables backlight control when 1, disables when 0");
6891
6892 module_param(hotkey_report_mode, uint, 0);
6893 MODULE_PARM_DESC(hotkey_report_mode,
6894                  "used for backwards compatibility with userspace, "
6895                  "see documentation");
6896
6897 #define TPACPI_PARAM(feature) \
6898         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6899         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6900                          "at module load, see documentation")
6901
6902 TPACPI_PARAM(hotkey);
6903 TPACPI_PARAM(bluetooth);
6904 TPACPI_PARAM(video);
6905 TPACPI_PARAM(light);
6906 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6907 TPACPI_PARAM(dock);
6908 #endif
6909 #ifdef CONFIG_THINKPAD_ACPI_BAY
6910 TPACPI_PARAM(bay);
6911 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6912 TPACPI_PARAM(cmos);
6913 TPACPI_PARAM(led);
6914 TPACPI_PARAM(beep);
6915 TPACPI_PARAM(ecdump);
6916 TPACPI_PARAM(brightness);
6917 TPACPI_PARAM(volume);
6918 TPACPI_PARAM(fan);
6919
6920 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
6921 module_param(dbg_wlswemul, uint, 0);
6922 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
6923 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
6924 MODULE_PARM_DESC(wlsw_state,
6925                  "Initial state of the emulated WLSW switch");
6926
6927 module_param(dbg_bluetoothemul, uint, 0);
6928 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
6929 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
6930 MODULE_PARM_DESC(bluetooth_state,
6931                  "Initial state of the emulated bluetooth switch");
6932
6933 module_param(dbg_wwanemul, uint, 0);
6934 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
6935 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
6936 MODULE_PARM_DESC(wwan_state,
6937                  "Initial state of the emulated WWAN switch");
6938 #endif
6939
6940 static void thinkpad_acpi_module_exit(void)
6941 {
6942         struct ibm_struct *ibm, *itmp;
6943
6944         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6945
6946         list_for_each_entry_safe_reverse(ibm, itmp,
6947                                          &tpacpi_all_drivers,
6948                                          all_drivers) {
6949                 ibm_exit(ibm);
6950         }
6951
6952         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6953
6954         if (tpacpi_inputdev) {
6955                 if (tp_features.input_device_registered)
6956                         input_unregister_device(tpacpi_inputdev);
6957                 else
6958                         input_free_device(tpacpi_inputdev);
6959         }
6960
6961         if (tpacpi_hwmon)
6962                 hwmon_device_unregister(tpacpi_hwmon);
6963
6964         if (tp_features.sensors_pdev_attrs_registered)
6965                 device_remove_file(&tpacpi_sensors_pdev->dev,
6966                                    &dev_attr_thinkpad_acpi_pdev_name);
6967         if (tpacpi_sensors_pdev)
6968                 platform_device_unregister(tpacpi_sensors_pdev);
6969         if (tpacpi_pdev)
6970                 platform_device_unregister(tpacpi_pdev);
6971
6972         if (tp_features.sensors_pdrv_attrs_registered)
6973                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6974         if (tp_features.platform_drv_attrs_registered)
6975                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6976
6977         if (tp_features.sensors_pdrv_registered)
6978                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6979
6980         if (tp_features.platform_drv_registered)
6981                 platform_driver_unregister(&tpacpi_pdriver);
6982
6983         if (proc_dir)
6984                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6985
6986         if (tpacpi_wq)
6987                 destroy_workqueue(tpacpi_wq);
6988
6989         kfree(thinkpad_id.bios_version_str);
6990         kfree(thinkpad_id.ec_version_str);
6991         kfree(thinkpad_id.model_str);
6992 }
6993
6994
6995 static int __init thinkpad_acpi_module_init(void)
6996 {
6997         int ret, i;
6998
6999         tpacpi_lifecycle = TPACPI_LIFE_INIT;
7000
7001         /* Parameter checking */
7002         if (hotkey_report_mode > 2)
7003                 return -EINVAL;
7004
7005         /* Driver-level probe */
7006
7007         ret = get_thinkpad_model_data(&thinkpad_id);
7008         if (ret) {
7009                 printk(TPACPI_ERR
7010                         "unable to get DMI data: %d\n", ret);
7011                 thinkpad_acpi_module_exit();
7012                 return ret;
7013         }
7014         ret = probe_for_thinkpad();
7015         if (ret) {
7016                 thinkpad_acpi_module_exit();
7017                 return ret;
7018         }
7019
7020         /* Driver initialization */
7021
7022         TPACPI_ACPIHANDLE_INIT(ecrd);
7023         TPACPI_ACPIHANDLE_INIT(ecwr);
7024
7025         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7026         if (!tpacpi_wq) {
7027                 thinkpad_acpi_module_exit();
7028                 return -ENOMEM;
7029         }
7030
7031         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7032         if (!proc_dir) {
7033                 printk(TPACPI_ERR
7034                        "unable to create proc dir " TPACPI_PROC_DIR);
7035                 thinkpad_acpi_module_exit();
7036                 return -ENODEV;
7037         }
7038         proc_dir->owner = THIS_MODULE;
7039
7040         ret = platform_driver_register(&tpacpi_pdriver);
7041         if (ret) {
7042                 printk(TPACPI_ERR
7043                        "unable to register main platform driver\n");
7044                 thinkpad_acpi_module_exit();
7045                 return ret;
7046         }
7047         tp_features.platform_drv_registered = 1;
7048
7049         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7050         if (ret) {
7051                 printk(TPACPI_ERR
7052                        "unable to register hwmon platform driver\n");
7053                 thinkpad_acpi_module_exit();
7054                 return ret;
7055         }
7056         tp_features.sensors_pdrv_registered = 1;
7057
7058         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7059         if (!ret) {
7060                 tp_features.platform_drv_attrs_registered = 1;
7061                 ret = tpacpi_create_driver_attributes(
7062                                         &tpacpi_hwmon_pdriver.driver);
7063         }
7064         if (ret) {
7065                 printk(TPACPI_ERR
7066                        "unable to create sysfs driver attributes\n");
7067                 thinkpad_acpi_module_exit();
7068                 return ret;
7069         }
7070         tp_features.sensors_pdrv_attrs_registered = 1;
7071
7072
7073         /* Device initialization */
7074         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7075                                                         NULL, 0);
7076         if (IS_ERR(tpacpi_pdev)) {
7077                 ret = PTR_ERR(tpacpi_pdev);
7078                 tpacpi_pdev = NULL;
7079                 printk(TPACPI_ERR "unable to register platform device\n");
7080                 thinkpad_acpi_module_exit();
7081                 return ret;
7082         }
7083         tpacpi_sensors_pdev = platform_device_register_simple(
7084                                                 TPACPI_HWMON_DRVR_NAME,
7085                                                 -1, NULL, 0);
7086         if (IS_ERR(tpacpi_sensors_pdev)) {
7087                 ret = PTR_ERR(tpacpi_sensors_pdev);
7088                 tpacpi_sensors_pdev = NULL;
7089                 printk(TPACPI_ERR
7090                        "unable to register hwmon platform device\n");
7091                 thinkpad_acpi_module_exit();
7092                 return ret;
7093         }
7094         ret = device_create_file(&tpacpi_sensors_pdev->dev,
7095                                  &dev_attr_thinkpad_acpi_pdev_name);
7096         if (ret) {
7097                 printk(TPACPI_ERR
7098                        "unable to create sysfs hwmon device attributes\n");
7099                 thinkpad_acpi_module_exit();
7100                 return ret;
7101         }
7102         tp_features.sensors_pdev_attrs_registered = 1;
7103         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7104         if (IS_ERR(tpacpi_hwmon)) {
7105                 ret = PTR_ERR(tpacpi_hwmon);
7106                 tpacpi_hwmon = NULL;
7107                 printk(TPACPI_ERR "unable to register hwmon device\n");
7108                 thinkpad_acpi_module_exit();
7109                 return ret;
7110         }
7111         mutex_init(&tpacpi_inputdev_send_mutex);
7112         tpacpi_inputdev = input_allocate_device();
7113         if (!tpacpi_inputdev) {
7114                 printk(TPACPI_ERR "unable to allocate input device\n");
7115                 thinkpad_acpi_module_exit();
7116                 return -ENOMEM;
7117         } else {
7118                 /* Prepare input device, but don't register */
7119                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7120                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7121                 tpacpi_inputdev->id.bustype = BUS_HOST;
7122                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7123                                                 thinkpad_id.vendor :
7124                                                 PCI_VENDOR_ID_IBM;
7125                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7126                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7127         }
7128         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7129                 ret = ibm_init(&ibms_init[i]);
7130                 if (ret >= 0 && *ibms_init[i].param)
7131                         ret = ibms_init[i].data->write(ibms_init[i].param);
7132                 if (ret < 0) {
7133                         thinkpad_acpi_module_exit();
7134                         return ret;
7135                 }
7136         }
7137         ret = input_register_device(tpacpi_inputdev);
7138         if (ret < 0) {
7139                 printk(TPACPI_ERR "unable to register input device\n");
7140                 thinkpad_acpi_module_exit();
7141                 return ret;
7142         } else {
7143                 tp_features.input_device_registered = 1;
7144         }
7145
7146         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7147         return 0;
7148 }
7149
7150 /* Please remove this in year 2009 */
7151 MODULE_ALIAS("ibm_acpi");
7152
7153 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7154
7155 /*
7156  * DMI matching for module autoloading
7157  *
7158  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7159  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7160  *
7161  * Only models listed in thinkwiki will be supported, so add yours
7162  * if it is not there yet.
7163  */
7164 #define IBM_BIOS_MODULE_ALIAS(__type) \
7165         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
7166
7167 /* Non-ancient thinkpads */
7168 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7169 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7170
7171 /* Ancient thinkpad BIOSes have to be identified by
7172  * BIOS type or model number, and there are far less
7173  * BIOS types than model numbers... */
7174 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
7175 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
7176 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
7177
7178 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7179 MODULE_DESCRIPTION(TPACPI_DESC);
7180 MODULE_VERSION(TPACPI_VERSION);
7181 MODULE_LICENSE("GPL");
7182
7183 module_init(thinkpad_acpi_module_init);
7184 module_exit(thinkpad_acpi_module_exit);