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