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 "0.19"
  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 <asm/uaccess.h>
  71
  72 #include <linux/dmi.h>
  73 #include <linux/jiffies.h>
  74 #include <linux/workqueue.h>
  75
  76 #include <acpi/acpi_drivers.h>
  77 #include <acpi/acnamesp.h>
  78
  79 #include <linux/pci_ids.h>
  80
  81
  82 /* ThinkPad CMOS commands */
  83 #define TP_CMOS_VOLUME_DOWN     0
  84 #define TP_CMOS_VOLUME_UP       1
  85 #define TP_CMOS_VOLUME_MUTE     2
  86 #define TP_CMOS_BRIGHTNESS_UP   4
  87 #define TP_CMOS_BRIGHTNESS_DOWN 5
  88
  89 /* NVRAM Addresses */
  90 enum tp_nvram_addr {
  91         TP_NVRAM_ADDR_HK2               = 0x57,
  92         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  93         TP_NVRAM_ADDR_VIDEO             = 0x59,
  94         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  95         TP_NVRAM_ADDR_MIXER             = 0x60,
  96 };
  97
  98 /* NVRAM bit masks */
  99 enum {
 100         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 101         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 102         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 103         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 104         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 105         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 106         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 107         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 108         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 109         TP_NVRAM_MASK_MUTE              = 0x40,
 110         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 111         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 112         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 113 };
 114
 115 /* ACPI HIDs */
 116 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 117
 118 /* Input IDs */
 119 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 120 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 121
 122
 123 /****************************************************************************
 124  * Main driver
 125  */
 126
 127 #define TPACPI_NAME "thinkpad"
 128 #define TPACPI_DESC "ThinkPad ACPI Extras"
 129 #define TPACPI_FILE TPACPI_NAME "_acpi"
 130 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 131 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 132
 133 #define TPACPI_PROC_DIR "ibm"
 134 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 135 #define TPACPI_DRVR_NAME TPACPI_FILE
 136 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 137
 138 #define TPACPI_MAX_ACPI_ARGS 3
 139
 140 /* Debugging */
 141 #define TPACPI_LOG TPACPI_FILE ": "
 142 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 143 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 144 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 145 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 146
 147 #define TPACPI_DBG_ALL          0xffff
 148 #define TPACPI_DBG_ALL          0xffff
 149 #define TPACPI_DBG_INIT         0x0001
 150 #define TPACPI_DBG_EXIT         0x0002
 151 #define dbg_printk(a_dbg_level, format, arg...) \
 152         do { if (dbg_level & a_dbg_level) \
 153                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 154         } while (0)
 155 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 156 #define vdbg_printk(a_dbg_level, format, arg...) \
 157         dbg_printk(a_dbg_level, format, ## arg)
 158 static const char *str_supported(int is_supported);
 159 #else
 160 #define vdbg_printk(a_dbg_level, format, arg...)
 161 #endif
 162
 163 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 164 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 165 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 166
 167
 168 /****************************************************************************
 169  * Driver-wide structs and misc. variables
 170  */
 171
 172 struct ibm_struct;
 173
 174 struct tp_acpi_drv_struct {
 175         const struct acpi_device_id *hid;
 176         struct acpi_driver *driver;
 177
 178         void (*notify) (struct ibm_struct *, u32);
 179         acpi_handle *handle;
 180         u32 type;
 181         struct acpi_device *device;
 182 };
 183
 184 struct ibm_struct {
 185         char *name;
 186
 187         int (*read) (char *);
 188         int (*write) (char *);
 189         void (*exit) (void);
 190         void (*resume) (void);
 191         void (*suspend) (pm_message_t state);
 192
 193         struct list_head all_drivers;
 194
 195         struct tp_acpi_drv_struct *acpi;
 196
 197         struct {
 198                 u8 acpi_driver_registered:1;
 199                 u8 acpi_notify_installed:1;
 200                 u8 proc_created:1;
 201                 u8 init_called:1;
 202                 u8 experimental:1;
 203         } flags;
 204 };
 205
 206 struct ibm_init_struct {
 207         char param[32];
 208
 209         int (*init) (struct ibm_init_struct *);
 210         struct ibm_struct *data;
 211 };
 212
 213 static struct {
 214 #ifdef CONFIG_THINKPAD_ACPI_BAY
 215         u32 bay_status:1;
 216         u32 bay_eject:1;
 217         u32 bay_status2:1;
 218         u32 bay_eject2:1;
 219 #endif
 220         u32 bluetooth:1;
 221         u32 hotkey:1;
 222         u32 hotkey_mask:1;
 223         u32 hotkey_wlsw:1;
 224         u32 light:1;
 225         u32 light_status:1;
 226         u32 bright_16levels:1;
 227         u32 wan:1;
 228         u32 fan_ctrl_status_undef:1;
 229         u32 input_device_registered:1;
 230         u32 platform_drv_registered:1;
 231         u32 platform_drv_attrs_registered:1;
 232         u32 sensors_pdrv_registered:1;
 233         u32 sensors_pdrv_attrs_registered:1;
 234         u32 sensors_pdev_attrs_registered:1;
 235         u32 hotkey_poll_active:1;
 236 } tp_features;
 237
 238 struct thinkpad_id_data {
 239         unsigned int vendor;    /* ThinkPad vendor:
 240                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 241
 242         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 243         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 244
 245         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 246         u16 ec_model;
 247
 248         char *model_str;
 249 };
 250 static struct thinkpad_id_data thinkpad_id;
 251
 252 static enum {
 253         TPACPI_LIFE_INIT = 0,
 254         TPACPI_LIFE_RUNNING,
 255         TPACPI_LIFE_EXITING,
 256 } tpacpi_lifecycle;
 257
 258 static int experimental;
 259 static u32 dbg_level;
 260
 261 /****************************************************************************
 262  ****************************************************************************
 263  *
 264  * ACPI Helpers and device model
 265  *
 266  ****************************************************************************
 267  ****************************************************************************/
 268
 269 /*************************************************************************
 270  * ACPI basic handles
 271  */
 272
 273 static acpi_handle root_handle;
 274
 275 #define TPACPI_HANDLE(object, parent, paths...)                 \
 276         static acpi_handle  object##_handle;                    \
 277         static acpi_handle *object##_parent = &parent##_handle; \
 278         static char        *object##_path;                      \
 279         static char        *object##_paths[] = { paths }
 280
 281 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 282            "\\_SB.PCI.ISA.EC",  /* 570 */
 283            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 284            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 285            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 286            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 287            "\\_SB.PCI0.LPC.EC", /* all others */
 288            );
 289
 290 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 291 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 292
 293 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 294                                         /* T4x, X31, X40 */
 295            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 296            "\\CMS",             /* R40, R40e */
 297            );                   /* all others */
 298
 299 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 300            "^HKEY",             /* R30, R31 */
 301            "HKEY",              /* all others */
 302            );                   /* 570 */
 303
 304
 305 /*************************************************************************
 306  * ACPI helpers
 307  */
 308
 309 static int acpi_evalf(acpi_handle handle,
 310                       void *res, char *method, char *fmt, ...)
 311 {
 312         char *fmt0 = fmt;
 313         struct acpi_object_list params;
 314         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 315         struct acpi_buffer result, *resultp;
 316         union acpi_object out_obj;
 317         acpi_status status;
 318         va_list ap;
 319         char res_type;
 320         int success;
 321         int quiet;
 322
 323         if (!*fmt) {
 324                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 325                 return 0;
 326         }
 327
 328         if (*fmt == 'q') {
 329                 quiet = 1;
 330                 fmt++;
 331         } else
 332                 quiet = 0;
 333
 334         res_type = *(fmt++);
 335
 336         params.count = 0;
 337         params.pointer = &in_objs[0];
 338
 339         va_start(ap, fmt);
 340         while (*fmt) {
 341                 char c = *(fmt++);
 342                 switch (c) {
 343                 case 'd':       /* int */
 344                         in_objs[params.count].integer.value = va_arg(ap, int);
 345                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 346                         break;
 347                         /* add more types as needed */
 348                 default:
 349                         printk(TPACPI_ERR "acpi_evalf() called "
 350                                "with invalid format character '%c'\n", c);
 351                         return 0;
 352                 }
 353         }
 354         va_end(ap);
 355
 356         if (res_type != 'v') {
 357                 result.length = sizeof(out_obj);
 358                 result.pointer = &out_obj;
 359                 resultp = &result;
 360         } else
 361                 resultp = NULL;
 362
 363         status = acpi_evaluate_object(handle, method, &params, resultp);
 364
 365         switch (res_type) {
 366         case 'd':               /* int */
 367                 if (res)
 368                         *(int *)res = out_obj.integer.value;
 369                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 370                 break;
 371         case 'v':               /* void */
 372                 success = status == AE_OK;
 373                 break;
 374                 /* add more types as needed */
 375         default:
 376                 printk(TPACPI_ERR "acpi_evalf() called "
 377                        "with invalid format character '%c'\n", res_type);
 378                 return 0;
 379         }
 380
 381         if (!success && !quiet)
 382                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 383                        method, fmt0, status);
 384
 385         return success;
 386 }
 387
 388 static int acpi_ec_read(int i, u8 *p)
 389 {
 390         int v;
 391
 392         if (ecrd_handle) {
 393                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 394                         return 0;
 395                 *p = v;
 396         } else {
 397                 if (ec_read(i, p) < 0)
 398                         return 0;
 399         }
 400
 401         return 1;
 402 }
 403
 404 static int acpi_ec_write(int i, u8 v)
 405 {
 406         if (ecwr_handle) {
 407                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 408                         return 0;
 409         } else {
 410                 if (ec_write(i, v) < 0)
 411                         return 0;
 412         }
 413
 414         return 1;
 415 }
 416
 417 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 418 static int _sta(acpi_handle handle)
 419 {
 420         int status;
 421
 422         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 423                 status = 0;
 424
 425         return status;
 426 }
 427 #endif
 428
 429 static int issue_thinkpad_cmos_command(int cmos_cmd)
 430 {
 431         if (!cmos_handle)
 432                 return -ENXIO;
 433
 434         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 435                 return -EIO;
 436
 437         return 0;
 438 }
 439
 440 /*************************************************************************
 441  * ACPI device model
 442  */
 443
 444 #define TPACPI_ACPIHANDLE_INIT(object) \
 445         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 446                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 447
 448 static void drv_acpi_handle_init(char *name,
 449                            acpi_handle *handle, acpi_handle parent,
 450                            char **paths, int num_paths, char **path)
 451 {
 452         int i;
 453         acpi_status status;
 454
 455         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 456                 name);
 457
 458         for (i = 0; i < num_paths; i++) {
 459                 status = acpi_get_handle(parent, paths[i], handle);
 460                 if (ACPI_SUCCESS(status)) {
 461                         *path = paths[i];
 462                         dbg_printk(TPACPI_DBG_INIT,
 463                                    "Found ACPI handle %s for %s\n",
 464                                    *path, name);
 465                         return;
 466                 }
 467         }
 468
 469         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 470                     name);
 471         *handle = NULL;
 472 }
 473
 474 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 475 {
 476         struct ibm_struct *ibm = data;
 477
 478         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 479                 return;
 480
 481         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 482                 return;
 483
 484         ibm->acpi->notify(ibm, event);
 485 }
 486
 487 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 488 {
 489         acpi_status status;
 490         int rc;
 491
 492         BUG_ON(!ibm->acpi);
 493
 494         if (!*ibm->acpi->handle)
 495                 return 0;
 496
 497         vdbg_printk(TPACPI_DBG_INIT,
 498                 "setting up ACPI notify for %s\n", ibm->name);
 499
 500         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 501         if (rc < 0) {
 502                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 503                         ibm->name, rc);
 504                 return -ENODEV;
 505         }
 506
 507         acpi_driver_data(ibm->acpi->device) = ibm;
 508         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 509                 TPACPI_ACPI_EVENT_PREFIX,
 510                 ibm->name);
 511
 512         status = acpi_install_notify_handler(*ibm->acpi->handle,
 513                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 514         if (ACPI_FAILURE(status)) {
 515                 if (status == AE_ALREADY_EXISTS) {
 516                         printk(TPACPI_NOTICE
 517                                "another device driver is already "
 518                                "handling %s events\n", ibm->name);
 519                 } else {
 520                         printk(TPACPI_ERR
 521                                "acpi_install_notify_handler(%s) failed: %d\n",
 522                                ibm->name, status);
 523                 }
 524                 return -ENODEV;
 525         }
 526         ibm->flags.acpi_notify_installed = 1;
 527         return 0;
 528 }
 529
 530 static int __init tpacpi_device_add(struct acpi_device *device)
 531 {
 532         return 0;
 533 }
 534
 535 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 536 {
 537         int rc;
 538
 539         dbg_printk(TPACPI_DBG_INIT,
 540                 "registering %s as an ACPI driver\n", ibm->name);
 541
 542         BUG_ON(!ibm->acpi);
 543
 544         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 545         if (!ibm->acpi->driver) {
 546                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 547                 return -ENOMEM;
 548         }
 549
 550         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 551         ibm->acpi->driver->ids = ibm->acpi->hid;
 552
 553         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 554
 555         rc = acpi_bus_register_driver(ibm->acpi->driver);
 556         if (rc < 0) {
 557                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 558                        ibm->name, rc);
 559                 kfree(ibm->acpi->driver);
 560                 ibm->acpi->driver = NULL;
 561         } else if (!rc)
 562                 ibm->flags.acpi_driver_registered = 1;
 563
 564         return rc;
 565 }
 566
 567
 568 /****************************************************************************
 569  ****************************************************************************
 570  *
 571  * Procfs Helpers
 572  *
 573  ****************************************************************************
 574  ****************************************************************************/
 575
 576 static int dispatch_procfs_read(char *page, char **start, off_t off,
 577                         int count, int *eof, void *data)
 578 {
 579         struct ibm_struct *ibm = data;
 580         int len;
 581
 582         if (!ibm || !ibm->read)
 583                 return -EINVAL;
 584
 585         len = ibm->read(page);
 586         if (len < 0)
 587                 return len;
 588
 589         if (len <= off + count)
 590                 *eof = 1;
 591         *start = page + off;
 592         len -= off;
 593         if (len > count)
 594                 len = count;
 595         if (len < 0)
 596                 len = 0;
 597
 598         return len;
 599 }
 600
 601 static int dispatch_procfs_write(struct file *file,
 602                         const char __user *userbuf,
 603                         unsigned long count, void *data)
 604 {
 605         struct ibm_struct *ibm = data;
 606         char *kernbuf;
 607         int ret;
 608
 609         if (!ibm || !ibm->write)
 610                 return -EINVAL;
 611
 612         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 613         if (!kernbuf)
 614                 return -ENOMEM;
 615
 616         if (copy_from_user(kernbuf, userbuf, count)) {
 617                 kfree(kernbuf);
 618                 return -EFAULT;
 619         }
 620
 621         kernbuf[count] = 0;
 622         strcat(kernbuf, ",");
 623         ret = ibm->write(kernbuf);
 624         if (ret == 0)
 625                 ret = count;
 626
 627         kfree(kernbuf);
 628
 629         return ret;
 630 }
 631
 632 static char *next_cmd(char **cmds)
 633 {
 634         char *start = *cmds;
 635         char *end;
 636
 637         while ((end = strchr(start, ',')) && end == start)
 638                 start = end + 1;
 639
 640         if (!end)
 641                 return NULL;
 642
 643         *end = 0;
 644         *cmds = end + 1;
 645         return start;
 646 }
 647
 648
 649 /****************************************************************************
 650  ****************************************************************************
 651  *
 652  * Device model: input, hwmon and platform
 653  *
 654  ****************************************************************************
 655  ****************************************************************************/
 656
 657 static struct platform_device *tpacpi_pdev;
 658 static struct platform_device *tpacpi_sensors_pdev;
 659 static struct device *tpacpi_hwmon;
 660 static struct input_dev *tpacpi_inputdev;
 661 static struct mutex tpacpi_inputdev_send_mutex;
 662 static LIST_HEAD(tpacpi_all_drivers);
 663
 664 static int tpacpi_suspend_handler(struct platform_device *pdev,
 665                                   pm_message_t state)
 666 {
 667         struct ibm_struct *ibm, *itmp;
 668
 669         list_for_each_entry_safe(ibm, itmp,
 670                                  &tpacpi_all_drivers,
 671                                  all_drivers) {
 672                 if (ibm->suspend)
 673                         (ibm->suspend)(state);
 674         }
 675
 676         return 0;
 677 }
 678
 679 static int tpacpi_resume_handler(struct platform_device *pdev)
 680 {
 681         struct ibm_struct *ibm, *itmp;
 682
 683         list_for_each_entry_safe(ibm, itmp,
 684                                  &tpacpi_all_drivers,
 685                                  all_drivers) {
 686                 if (ibm->resume)
 687                         (ibm->resume)();
 688         }
 689
 690         return 0;
 691 }
 692
 693 static struct platform_driver tpacpi_pdriver = {
 694         .driver = {
 695                 .name = TPACPI_DRVR_NAME,
 696                 .owner = THIS_MODULE,
 697         },
 698         .suspend = tpacpi_suspend_handler,
 699         .resume = tpacpi_resume_handler,
 700 };
 701
 702 static struct platform_driver tpacpi_hwmon_pdriver = {
 703         .driver = {
 704                 .name = TPACPI_HWMON_DRVR_NAME,
 705                 .owner = THIS_MODULE,
 706         },
 707 };
 708
 709 /*************************************************************************
 710  * sysfs support helpers
 711  */
 712
 713 struct attribute_set {
 714         unsigned int members, max_members;
 715         struct attribute_group group;
 716 };
 717
 718 struct attribute_set_obj {
 719         struct attribute_set s;
 720         struct attribute *a;
 721 } __attribute__((packed));
 722
 723 static struct attribute_set *create_attr_set(unsigned int max_members,
 724                                                 const char *name)
 725 {
 726         struct attribute_set_obj *sobj;
 727
 728         if (max_members == 0)
 729                 return NULL;
 730
 731         /* Allocates space for implicit NULL at the end too */
 732         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 733                     max_members * sizeof(struct attribute *),
 734                     GFP_KERNEL);
 735         if (!sobj)
 736                 return NULL;
 737         sobj->s.max_members = max_members;
 738         sobj->s.group.attrs = &sobj->a;
 739         sobj->s.group.name = name;
 740
 741         return &sobj->s;
 742 }
 743
 744 #define destroy_attr_set(_set) \
 745         kfree(_set);
 746
 747 /* not multi-threaded safe, use it in a single thread per set */
 748 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 749 {
 750         if (!s || !attr)
 751                 return -EINVAL;
 752
 753         if (s->members >= s->max_members)
 754                 return -ENOMEM;
 755
 756         s->group.attrs[s->members] = attr;
 757         s->members++;
 758
 759         return 0;
 760 }
 761
 762 static int add_many_to_attr_set(struct attribute_set *s,
 763                         struct attribute **attr,
 764                         unsigned int count)
 765 {
 766         int i, res;
 767
 768         for (i = 0; i < count; i++) {
 769                 res = add_to_attr_set(s, attr[i]);
 770                 if (res)
 771                         return res;
 772         }
 773
 774         return 0;
 775 }
 776
 777 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 778 {
 779         sysfs_remove_group(kobj, &s->group);
 780         destroy_attr_set(s);
 781 }
 782
 783 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 784         sysfs_create_group(_kobj, &_attr_set->group)
 785
 786 static int parse_strtoul(const char *buf,
 787                 unsigned long max, unsigned long *value)
 788 {
 789         char *endp;
 790
 791         while (*buf && isspace(*buf))
 792                 buf++;
 793         *value = simple_strtoul(buf, &endp, 0);
 794         while (*endp && isspace(*endp))
 795                 endp++;
 796         if (*endp || *value > max)
 797                 return -EINVAL;
 798
 799         return 0;
 800 }
 801
 802 /*************************************************************************
 803  * thinkpad-acpi driver attributes
 804  */
 805
 806 /* interface_version --------------------------------------------------- */
 807 static ssize_t tpacpi_driver_interface_version_show(
 808                                 struct device_driver *drv,
 809                                 char *buf)
 810 {
 811         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 812 }
 813
 814 static DRIVER_ATTR(interface_version, S_IRUGO,
 815                 tpacpi_driver_interface_version_show, NULL);
 816
 817 /* debug_level --------------------------------------------------------- */
 818 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 819                                                 char *buf)
 820 {
 821         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 822 }
 823
 824 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 825                                                 const char *buf, size_t count)
 826 {
 827         unsigned long t;
 828
 829         if (parse_strtoul(buf, 0xffff, &t))
 830                 return -EINVAL;
 831
 832         dbg_level = t;
 833
 834         return count;
 835 }
 836
 837 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 838                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 839
 840 /* version ------------------------------------------------------------- */
 841 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 842                                                 char *buf)
 843 {
 844         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 845                         TPACPI_DESC, TPACPI_VERSION);
 846 }
 847
 848 static DRIVER_ATTR(version, S_IRUGO,
 849                 tpacpi_driver_version_show, NULL);
 850
 851 /* --------------------------------------------------------------------- */
 852
 853 static struct driver_attribute *tpacpi_driver_attributes[] = {
 854         &driver_attr_debug_level, &driver_attr_version,
 855         &driver_attr_interface_version,
 856 };
 857
 858 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 859 {
 860         int i, res;
 861
 862         i = 0;
 863         res = 0;
 864         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 865                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 866                 i++;
 867         }
 868
 869         return res;
 870 }
 871
 872 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 873 {
 874         int i;
 875
 876         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 877                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 878 }
 879
 880 /****************************************************************************
 881  ****************************************************************************
 882  *
 883  * Subdrivers
 884  *
 885  ****************************************************************************
 886  ****************************************************************************/
 887
 888 /*************************************************************************
 889  * thinkpad-acpi init subdriver
 890  */
 891
 892 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 893 {
 894         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
 895         printk(TPACPI_INFO "%s\n", TPACPI_URL);
 896
 897         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
 898                 (thinkpad_id.bios_version_str) ?
 899                         thinkpad_id.bios_version_str : "unknown",
 900                 (thinkpad_id.ec_version_str) ?
 901                         thinkpad_id.ec_version_str : "unknown");
 902
 903         if (thinkpad_id.vendor && thinkpad_id.model_str)
 904                 printk(TPACPI_INFO "%s %s\n",
 905                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
 906                                 "IBM" : ((thinkpad_id.vendor ==
 907                                                 PCI_VENDOR_ID_LENOVO) ?
 908                                         "Lenovo" : "Unknown vendor"),
 909                         thinkpad_id.model_str);
 910
 911         return 0;
 912 }
 913
 914 static int thinkpad_acpi_driver_read(char *p)
 915 {
 916         int len = 0;
 917
 918         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
 919         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
 920
 921         return len;
 922 }
 923
 924 static struct ibm_struct thinkpad_acpi_driver_data = {
 925         .name = "driver",
 926         .read = thinkpad_acpi_driver_read,
 927 };
 928
 929 /*************************************************************************
 930  * Hotkey subdriver
 931  */
 932
 933 enum {  /* hot key scan codes (derived from ACPI DSDT) */
 934         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
 935         TP_ACPI_HOTKEYSCAN_FNF2,
 936         TP_ACPI_HOTKEYSCAN_FNF3,
 937         TP_ACPI_HOTKEYSCAN_FNF4,
 938         TP_ACPI_HOTKEYSCAN_FNF5,
 939         TP_ACPI_HOTKEYSCAN_FNF6,
 940         TP_ACPI_HOTKEYSCAN_FNF7,
 941         TP_ACPI_HOTKEYSCAN_FNF8,
 942         TP_ACPI_HOTKEYSCAN_FNF9,
 943         TP_ACPI_HOTKEYSCAN_FNF10,
 944         TP_ACPI_HOTKEYSCAN_FNF11,
 945         TP_ACPI_HOTKEYSCAN_FNF12,
 946         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
 947         TP_ACPI_HOTKEYSCAN_FNINSERT,
 948         TP_ACPI_HOTKEYSCAN_FNDELETE,
 949         TP_ACPI_HOTKEYSCAN_FNHOME,
 950         TP_ACPI_HOTKEYSCAN_FNEND,
 951         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 952         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
 953         TP_ACPI_HOTKEYSCAN_FNSPACE,
 954         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 955         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 956         TP_ACPI_HOTKEYSCAN_MUTE,
 957         TP_ACPI_HOTKEYSCAN_THINKPAD,
 958 };
 959
 960 enum {  /* Keys available through NVRAM polling */
 961         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
 962         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
 963 };
 964
 965 enum {  /* Positions of some of the keys in hotkey masks */
 966         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
 967         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
 968         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
 969         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
 970         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
 971         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 972         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
 973         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 974         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 975         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
 976         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
 977 };
 978
 979 enum {  /* NVRAM to ACPI HKEY group map */
 980         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
 981                                           TP_ACPI_HKEY_ZOOM_MASK |
 982                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
 983                                           TP_ACPI_HKEY_HIBERNATE_MASK,
 984         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
 985                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
 986         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
 987                                           TP_ACPI_HKEY_VOLDWN_MASK |
 988                                           TP_ACPI_HKEY_MUTE_MASK,
 989 };
 990
 991 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
 992 struct tp_nvram_state {
 993        u16 thinkpad_toggle:1;
 994        u16 zoom_toggle:1;
 995        u16 display_toggle:1;
 996        u16 thinklight_toggle:1;
 997        u16 hibernate_toggle:1;
 998        u16 displayexp_toggle:1;
 999        u16 display_state:1;
1000        u16 brightness_toggle:1;
1001        u16 volume_toggle:1;
1002        u16 mute:1;
1003
1004        u8 brightness_level;
1005        u8 volume_level;
1006 };
1007
1008 static struct task_struct *tpacpi_hotkey_task;
1009 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1010 static int hotkey_poll_freq = 10;       /* Hz */
1011 static struct mutex hotkey_thread_mutex;
1012 static struct mutex hotkey_thread_data_mutex;
1013 static unsigned int hotkey_config_change;
1014
1015 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1016
1017 #define hotkey_source_mask 0U
1018
1019 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1020
1021 static struct mutex hotkey_mutex;
1022
1023 static enum {   /* Reasons for waking up */
1024         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1025         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1026         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1027 } hotkey_wakeup_reason;
1028
1029 static int hotkey_autosleep_ack;
1030
1031 static int hotkey_orig_status;
1032 static u32 hotkey_orig_mask;
1033 static u32 hotkey_all_mask;
1034 static u32 hotkey_reserved_mask;
1035 static u32 hotkey_mask;
1036
1037 static unsigned int hotkey_report_mode;
1038
1039 static u16 *hotkey_keycode_map;
1040
1041 static struct attribute_set *hotkey_dev_attributes;
1042
1043 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1044 #define HOTKEY_CONFIG_CRITICAL_START \
1045         do { \
1046                 mutex_lock(&hotkey_thread_data_mutex); \
1047                 hotkey_config_change++; \
1048         } while (0);
1049 #define HOTKEY_CONFIG_CRITICAL_END \
1050         mutex_unlock(&hotkey_thread_data_mutex);
1051 #else
1052 #define HOTKEY_CONFIG_CRITICAL_START
1053 #define HOTKEY_CONFIG_CRITICAL_END
1054 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1055
1056 static int hotkey_get_wlsw(int *status)
1057 {
1058         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1059                 return -EIO;
1060         return 0;
1061 }
1062
1063 /*
1064  * Call with hotkey_mutex held
1065  */
1066 static int hotkey_mask_get(void)
1067 {
1068         u32 m = 0;
1069
1070         if (tp_features.hotkey_mask) {
1071                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1072                         return -EIO;
1073         }
1074         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1075
1076         return 0;
1077 }
1078
1079 /*
1080  * Call with hotkey_mutex held
1081  */
1082 static int hotkey_mask_set(u32 mask)
1083 {
1084         int i;
1085         int rc = 0;
1086
1087         if (tp_features.hotkey_mask) {
1088                 HOTKEY_CONFIG_CRITICAL_START
1089                 for (i = 0; i < 32; i++) {
1090                         u32 m = 1 << i;
1091                         /* enable in firmware mask only keys not in NVRAM
1092                          * mode, but enable the key in the cached hotkey_mask
1093                          * regardless of mode, or the key will end up
1094                          * disabled by hotkey_mask_get() */
1095                         if (!acpi_evalf(hkey_handle,
1096                                         NULL, "MHKM", "vdd", i + 1,
1097                                         !!((mask & ~hotkey_source_mask) & m))) {
1098                                 rc = -EIO;
1099                                 break;
1100                         } else {
1101                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1102                         }
1103                 }
1104                 HOTKEY_CONFIG_CRITICAL_END
1105
1106                 /* hotkey_mask_get must be called unconditionally below */
1107                 if (!hotkey_mask_get() && !rc &&
1108                     (hotkey_mask & ~hotkey_source_mask) !=
1109                      (mask & ~hotkey_source_mask)) {
1110                         printk(TPACPI_NOTICE
1111                                "requested hot key mask 0x%08x, but "
1112                                "firmware forced it to 0x%08x\n",
1113                                mask, hotkey_mask);
1114                 }
1115         } else {
1116 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1117                 HOTKEY_CONFIG_CRITICAL_START
1118                 hotkey_mask = mask & hotkey_source_mask;
1119                 HOTKEY_CONFIG_CRITICAL_END
1120                 hotkey_mask_get();
1121                 if (hotkey_mask != mask) {
1122                         printk(TPACPI_NOTICE
1123                                "requested hot key mask 0x%08x, "
1124                                "forced to 0x%08x (NVRAM poll mask is "
1125                                "0x%08x): no firmware mask support\n",
1126                                mask, hotkey_mask, hotkey_source_mask);
1127                 }
1128 #else
1129                 hotkey_mask_get();
1130                 rc = -ENXIO;
1131 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1132         }
1133
1134         return rc;
1135 }
1136
1137 static int hotkey_status_get(int *status)
1138 {
1139         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1140                 return -EIO;
1141
1142         return 0;
1143 }
1144
1145 static int hotkey_status_set(int status)
1146 {
1147         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1148                 return -EIO;
1149
1150         return 0;
1151 }
1152
1153 static void tpacpi_input_send_radiosw(void)
1154 {
1155         int wlsw;
1156
1157         mutex_lock(&tpacpi_inputdev_send_mutex);
1158
1159         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1160                 input_report_switch(tpacpi_inputdev,
1161                                     SW_RADIO, !!wlsw);
1162                 input_sync(tpacpi_inputdev);
1163         }
1164
1165         mutex_unlock(&tpacpi_inputdev_send_mutex);
1166 }
1167
1168 static void tpacpi_input_send_key(unsigned int scancode)
1169 {
1170         unsigned int keycode;
1171
1172         keycode = hotkey_keycode_map[scancode];
1173
1174         if (keycode != KEY_RESERVED) {
1175                 mutex_lock(&tpacpi_inputdev_send_mutex);
1176
1177                 input_report_key(tpacpi_inputdev, keycode, 1);
1178                 if (keycode == KEY_UNKNOWN)
1179                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1180                                     scancode);
1181                 input_sync(tpacpi_inputdev);
1182
1183                 input_report_key(tpacpi_inputdev, keycode, 0);
1184                 if (keycode == KEY_UNKNOWN)
1185                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1186                                     scancode);
1187                 input_sync(tpacpi_inputdev);
1188
1189                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1190         }
1191 }
1192
1193 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1194 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1195
1196 static void tpacpi_hotkey_send_key(unsigned int scancode)
1197 {
1198         tpacpi_input_send_key(scancode);
1199         if (hotkey_report_mode < 2) {
1200                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1201                                                 0x80, 0x1001 + scancode);
1202         }
1203 }
1204
1205 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1206 {
1207         u8 d;
1208
1209         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1210                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1211                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1212                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1213                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1214                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1215         }
1216         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1217                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1218                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1219         }
1220         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1221                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1222                 n->displayexp_toggle =
1223                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1224         }
1225         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1226                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1227                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1228                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1229                 n->brightness_toggle =
1230                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1231         }
1232         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1233                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1234                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1235                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1236                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1237                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1238         }
1239 }
1240
1241 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1242         do { \
1243                 if ((mask & (1 << __scancode)) && \
1244                     oldn->__member != newn->__member) \
1245                 tpacpi_hotkey_send_key(__scancode); \
1246         } while (0)
1247
1248 #define TPACPI_MAY_SEND_KEY(__scancode) \
1249         do { if (mask & (1 << __scancode)) \
1250                 tpacpi_hotkey_send_key(__scancode); } while (0)
1251
1252 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1253                                            struct tp_nvram_state *newn,
1254                                            u32 mask)
1255 {
1256         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1257         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1258         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1259         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1260
1261         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1262
1263         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1264
1265         /* handle volume */
1266         if (oldn->volume_toggle != newn->volume_toggle) {
1267                 if (oldn->mute != newn->mute) {
1268                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1269                 }
1270                 if (oldn->volume_level > newn->volume_level) {
1271                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1272                 } else if (oldn->volume_level < newn->volume_level) {
1273                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1274                 } else if (oldn->mute == newn->mute) {
1275                         /* repeated key presses that didn't change state */
1276                         if (newn->mute) {
1277                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1278                         } else if (newn->volume_level != 0) {
1279                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1280                         } else {
1281                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1282                         }
1283                 }
1284         }
1285
1286         /* handle brightness */
1287         if (oldn->brightness_toggle != newn->brightness_toggle) {
1288                 if (oldn->brightness_level < newn->brightness_level) {
1289                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1290                 } else if (oldn->brightness_level > newn->brightness_level) {
1291                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1292                 } else {
1293                         /* repeated key presses that didn't change state */
1294                         if (newn->brightness_level != 0) {
1295                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1296                         } else {
1297                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1298                         }
1299                 }
1300         }
1301 }
1302
1303 #undef TPACPI_COMPARE_KEY
1304 #undef TPACPI_MAY_SEND_KEY
1305
1306 static int hotkey_kthread(void *data)
1307 {
1308         struct tp_nvram_state s[2];
1309         u32 mask;
1310         unsigned int si, so;
1311         unsigned long t;
1312         unsigned int change_detector, must_reset;
1313
1314         mutex_lock(&hotkey_thread_mutex);
1315
1316         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1317                 goto exit;
1318
1319         set_freezable();
1320
1321         so = 0;
1322         si = 1;
1323         t = 0;
1324
1325         /* Initial state for compares */
1326         mutex_lock(&hotkey_thread_data_mutex);
1327         change_detector = hotkey_config_change;
1328         mask = hotkey_source_mask & hotkey_mask;
1329         mutex_unlock(&hotkey_thread_data_mutex);
1330         hotkey_read_nvram(&s[so], mask);
1331
1332         while (!kthread_should_stop() && hotkey_poll_freq) {
1333                 if (t == 0)
1334                         t = 1000/hotkey_poll_freq;
1335                 t = msleep_interruptible(t);
1336                 if (unlikely(kthread_should_stop()))
1337                         break;
1338                 must_reset = try_to_freeze();
1339                 if (t > 0 && !must_reset)
1340                         continue;
1341
1342                 mutex_lock(&hotkey_thread_data_mutex);
1343                 if (must_reset || hotkey_config_change != change_detector) {
1344                         /* forget old state on thaw or config change */
1345                         si = so;
1346                         t = 0;
1347                         change_detector = hotkey_config_change;
1348                 }
1349                 mask = hotkey_source_mask & hotkey_mask;
1350                 mutex_unlock(&hotkey_thread_data_mutex);
1351
1352                 if (likely(mask)) {
1353                         hotkey_read_nvram(&s[si], mask);
1354                         if (likely(si != so)) {
1355                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1356                                                                 mask);
1357                         }
1358                 }
1359
1360                 so = si;
1361                 si ^= 1;
1362         }
1363
1364 exit:
1365         mutex_unlock(&hotkey_thread_mutex);
1366         return 0;
1367 }
1368
1369 static void hotkey_poll_stop_sync(void)
1370 {
1371         if (tpacpi_hotkey_task) {
1372                 if (frozen(tpacpi_hotkey_task) ||
1373                     freezing(tpacpi_hotkey_task))
1374                         thaw_process(tpacpi_hotkey_task);
1375
1376                 kthread_stop(tpacpi_hotkey_task);
1377                 tpacpi_hotkey_task = NULL;
1378                 mutex_lock(&hotkey_thread_mutex);
1379                 /* at this point, the thread did exit */
1380                 mutex_unlock(&hotkey_thread_mutex);
1381         }
1382 }
1383
1384 /* call with hotkey_mutex held */
1385 static void hotkey_poll_setup(int may_warn)
1386 {
1387         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1388             hotkey_poll_freq > 0 &&
1389             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1390                 if (!tpacpi_hotkey_task) {
1391                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1392                                                          NULL,
1393                                                          TPACPI_FILE "d");
1394                         if (IS_ERR(tpacpi_hotkey_task)) {
1395                                 tpacpi_hotkey_task = NULL;
1396                                 printk(TPACPI_ERR
1397                                        "could not create kernel thread "
1398                                        "for hotkey polling\n");
1399                         }
1400                 }
1401         } else {
1402                 hotkey_poll_stop_sync();
1403                 if (may_warn &&
1404                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1405                         printk(TPACPI_NOTICE
1406                                 "hot keys 0x%08x require polling, "
1407                                 "which is currently disabled\n",
1408                                 hotkey_source_mask);
1409                 }
1410         }
1411 }
1412
1413 static void hotkey_poll_setup_safe(int may_warn)
1414 {
1415         mutex_lock(&hotkey_mutex);
1416         hotkey_poll_setup(may_warn);
1417         mutex_unlock(&hotkey_mutex);
1418 }
1419
1420 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1421
1422 static void hotkey_poll_setup_safe(int __unused)
1423 {
1424 }
1425
1426 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1427
1428 static int hotkey_inputdev_open(struct input_dev *dev)
1429 {
1430         switch (tpacpi_lifecycle) {
1431         case TPACPI_LIFE_INIT:
1432                 /*
1433                  * hotkey_init will call hotkey_poll_setup_safe
1434                  * at the appropriate moment
1435                  */
1436                 return 0;
1437         case TPACPI_LIFE_EXITING:
1438                 return -EBUSY;
1439         case TPACPI_LIFE_RUNNING:
1440                 hotkey_poll_setup_safe(0);
1441                 return 0;
1442         }
1443
1444         /* Should only happen if tpacpi_lifecycle is corrupt */
1445         BUG();
1446         return -EBUSY;
1447 }
1448
1449 static void hotkey_inputdev_close(struct input_dev *dev)
1450 {
1451         /* disable hotkey polling when possible */
1452         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1453                 hotkey_poll_setup_safe(0);
1454 }
1455
1456 /* sysfs hotkey enable ------------------------------------------------- */
1457 static ssize_t hotkey_enable_show(struct device *dev,
1458                            struct device_attribute *attr,
1459                            char *buf)
1460 {
1461         int res, status;
1462
1463         res = hotkey_status_get(&status);
1464         if (res)
1465                 return res;
1466
1467         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1468 }
1469
1470 static ssize_t hotkey_enable_store(struct device *dev,
1471                             struct device_attribute *attr,
1472                             const char *buf, size_t count)
1473 {
1474         unsigned long t;
1475         int res;
1476
1477         if (parse_strtoul(buf, 1, &t))
1478                 return -EINVAL;
1479
1480         res = hotkey_status_set(t);
1481
1482         return (res) ? res : count;
1483 }
1484
1485 static struct device_attribute dev_attr_hotkey_enable =
1486         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1487                 hotkey_enable_show, hotkey_enable_store);
1488
1489 /* sysfs hotkey mask --------------------------------------------------- */
1490 static ssize_t hotkey_mask_show(struct device *dev,
1491                            struct device_attribute *attr,
1492                            char *buf)
1493 {
1494         int res;
1495
1496         if (mutex_lock_interruptible(&hotkey_mutex))
1497                 return -ERESTARTSYS;
1498         res = hotkey_mask_get();
1499         mutex_unlock(&hotkey_mutex);
1500
1501         return (res)?
1502                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1503 }
1504
1505 static ssize_t hotkey_mask_store(struct device *dev,
1506                             struct device_attribute *attr,
1507                             const char *buf, size_t count)
1508 {
1509         unsigned long t;
1510         int res;
1511
1512         if (parse_strtoul(buf, 0xffffffffUL, &t))
1513                 return -EINVAL;
1514
1515         if (mutex_lock_interruptible(&hotkey_mutex))
1516                 return -ERESTARTSYS;
1517
1518         res = hotkey_mask_set(t);
1519
1520 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1521         hotkey_poll_setup(1);
1522 #endif
1523
1524         mutex_unlock(&hotkey_mutex);
1525
1526         return (res) ? res : count;
1527 }
1528
1529 static struct device_attribute dev_attr_hotkey_mask =
1530         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1531                 hotkey_mask_show, hotkey_mask_store);
1532
1533 /* sysfs hotkey bios_enabled ------------------------------------------- */
1534 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1535                            struct device_attribute *attr,
1536                            char *buf)
1537 {
1538         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1539 }
1540
1541 static struct device_attribute dev_attr_hotkey_bios_enabled =
1542         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1543
1544 /* sysfs hotkey bios_mask ---------------------------------------------- */
1545 static ssize_t hotkey_bios_mask_show(struct device *dev,
1546                            struct device_attribute *attr,
1547                            char *buf)
1548 {
1549         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1550 }
1551
1552 static struct device_attribute dev_attr_hotkey_bios_mask =
1553         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1554
1555 /* sysfs hotkey all_mask ----------------------------------------------- */
1556 static ssize_t hotkey_all_mask_show(struct device *dev,
1557                            struct device_attribute *attr,
1558                            char *buf)
1559 {
1560         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1561                                 hotkey_all_mask | hotkey_source_mask);
1562 }
1563
1564 static struct device_attribute dev_attr_hotkey_all_mask =
1565         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1566
1567 /* sysfs hotkey recommended_mask --------------------------------------- */
1568 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1569                                             struct device_attribute *attr,
1570                                             char *buf)
1571 {
1572         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1573                         (hotkey_all_mask | hotkey_source_mask)
1574                         & ~hotkey_reserved_mask);
1575 }
1576
1577 static struct device_attribute dev_attr_hotkey_recommended_mask =
1578         __ATTR(hotkey_recommended_mask, S_IRUGO,
1579                 hotkey_recommended_mask_show, NULL);
1580
1581 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1582
1583 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1584 static ssize_t hotkey_source_mask_show(struct device *dev,
1585                            struct device_attribute *attr,
1586                            char *buf)
1587 {
1588         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1589 }
1590
1591 static ssize_t hotkey_source_mask_store(struct device *dev,
1592                             struct device_attribute *attr,
1593                             const char *buf, size_t count)
1594 {
1595         unsigned long t;
1596
1597         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1598                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1599                 return -EINVAL;
1600
1601         if (mutex_lock_interruptible(&hotkey_mutex))
1602                 return -ERESTARTSYS;
1603
1604         HOTKEY_CONFIG_CRITICAL_START
1605         hotkey_source_mask = t;
1606         HOTKEY_CONFIG_CRITICAL_END
1607
1608         hotkey_poll_setup(1);
1609
1610         mutex_unlock(&hotkey_mutex);
1611
1612         return count;
1613 }
1614
1615 static struct device_attribute dev_attr_hotkey_source_mask =
1616         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1617                 hotkey_source_mask_show, hotkey_source_mask_store);
1618
1619 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1620 static ssize_t hotkey_poll_freq_show(struct device *dev,
1621                            struct device_attribute *attr,
1622                            char *buf)
1623 {
1624         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1625 }
1626
1627 static ssize_t hotkey_poll_freq_store(struct device *dev,
1628                             struct device_attribute *attr,
1629                             const char *buf, size_t count)
1630 {
1631         unsigned long t;
1632
1633         if (parse_strtoul(buf, 25, &t))
1634                 return -EINVAL;
1635
1636         if (mutex_lock_interruptible(&hotkey_mutex))
1637                 return -ERESTARTSYS;
1638
1639         hotkey_poll_freq = t;
1640
1641         hotkey_poll_setup(1);
1642         mutex_unlock(&hotkey_mutex);
1643
1644         return count;
1645 }
1646
1647 static struct device_attribute dev_attr_hotkey_poll_freq =
1648         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1649                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1650
1651 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1652
1653 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1654 static ssize_t hotkey_radio_sw_show(struct device *dev,
1655                            struct device_attribute *attr,
1656                            char *buf)
1657 {
1658         int res, s;
1659         res = hotkey_get_wlsw(&s);
1660         if (res < 0)
1661                 return res;
1662
1663         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1664 }
1665
1666 static struct device_attribute dev_attr_hotkey_radio_sw =
1667         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1668
1669 static void hotkey_radio_sw_notify_change(void)
1670 {
1671         if (tp_features.hotkey_wlsw)
1672                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1673                              "hotkey_radio_sw");
1674 }
1675
1676 /* sysfs hotkey report_mode -------------------------------------------- */
1677 static ssize_t hotkey_report_mode_show(struct device *dev,
1678                            struct device_attribute *attr,
1679                            char *buf)
1680 {
1681         return snprintf(buf, PAGE_SIZE, "%d\n",
1682                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1683 }
1684
1685 static struct device_attribute dev_attr_hotkey_report_mode =
1686         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1687
1688 /* sysfs wakeup reason (pollable) -------------------------------------- */
1689 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1690                            struct device_attribute *attr,
1691                            char *buf)
1692 {
1693         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1694 }
1695
1696 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1697         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1698
1699 static void hotkey_wakeup_reason_notify_change(void)
1700 {
1701         if (tp_features.hotkey_mask)
1702                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1703                              "wakeup_reason");
1704 }
1705
1706 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1707 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1708                            struct device_attribute *attr,
1709                            char *buf)
1710 {
1711         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1712 }
1713
1714 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1715         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1716                hotkey_wakeup_hotunplug_complete_show, NULL);
1717
1718 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1719 {
1720         if (tp_features.hotkey_mask)
1721                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1722                              "wakeup_hotunplug_complete");
1723 }
1724
1725 /* --------------------------------------------------------------------- */
1726
1727 static struct attribute *hotkey_attributes[] __initdata = {
1728         &dev_attr_hotkey_enable.attr,
1729         &dev_attr_hotkey_bios_enabled.attr,
1730         &dev_attr_hotkey_report_mode.attr,
1731 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1732         &dev_attr_hotkey_mask.attr,
1733         &dev_attr_hotkey_all_mask.attr,
1734         &dev_attr_hotkey_recommended_mask.attr,
1735         &dev_attr_hotkey_source_mask.attr,
1736         &dev_attr_hotkey_poll_freq.attr,
1737 #endif
1738 };
1739
1740 static struct attribute *hotkey_mask_attributes[] __initdata = {
1741         &dev_attr_hotkey_bios_mask.attr,
1742 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1743         &dev_attr_hotkey_mask.attr,
1744         &dev_attr_hotkey_all_mask.attr,
1745         &dev_attr_hotkey_recommended_mask.attr,
1746 #endif
1747         &dev_attr_hotkey_wakeup_reason.attr,
1748         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1749 };
1750
1751 static int __init hotkey_init(struct ibm_init_struct *iibm)
1752 {
1753         /* Requirements for changing the default keymaps:
1754          *
1755          * 1. Many of the keys are mapped to KEY_RESERVED for very
1756          *    good reasons.  Do not change them unless you have deep
1757          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1758          *    the various ThinkPad models.  The driver behaves
1759          *    differently for KEY_RESERVED: such keys have their
1760          *    hot key mask *unset* in mask_recommended, and also
1761          *    in the initial hot key mask programmed into the
1762          *    firmware at driver load time, which means the firm-
1763          *    ware may react very differently if you change them to
1764          *    something else;
1765          *
1766          * 2. You must be subscribed to the linux-thinkpad and
1767          *    ibm-acpi-devel mailing lists, and you should read the
1768          *    list archives since 2007 if you want to change the
1769          *    keymaps.  This requirement exists so that you will
1770          *    know the past history of problems with the thinkpad-
1771          *    acpi driver keymaps, and also that you will be
1772          *    listening to any bug reports;
1773          *
1774          * 3. Do not send thinkpad-acpi specific patches directly to
1775          *    for merging, *ever*.  Send them to the linux-acpi
1776          *    mailinglist for comments.  Merging is to be done only
1777          *    through acpi-test and the ACPI maintainer.
1778          *
1779          * If the above is too much to ask, don't change the keymap.
1780          * Ask the thinkpad-acpi maintainer to do it, instead.
1781          */
1782         static u16 ibm_keycode_map[] __initdata = {
1783                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1784                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1785                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1786                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1787
1788                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1789                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1790                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1791                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1792
1793                 /* brightness: firmware always reacts to them, unless
1794                  * X.org did some tricks in the radeon BIOS scratch
1795                  * registers of *some* models */
1796                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1797                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1798
1799                 /* Thinklight: firmware always react to it */
1800                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1801
1802                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1803                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1804
1805                 /* Volume: firmware always react to it and reprograms
1806                  * the built-in *extra* mixer.  Never map it to control
1807                  * another mixer by default. */
1808                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1809                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1810                 KEY_RESERVED,   /* 0x16: MUTE */
1811
1812                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1813
1814                 /* (assignments unknown, please report if found) */
1815                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1816                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1817         };
1818         static u16 lenovo_keycode_map[] __initdata = {
1819                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1820                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1821                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1822                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1823
1824                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1825                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1826                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1827                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1828
1829                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1830                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1831
1832                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1833
1834                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1835                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1836
1837                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1838                  * react to it and reprograms the built-in *extra* mixer.
1839                  * Never map it to control another mixer by default.
1840                  *
1841                  * T60?, T61, R60?, R61: firmware and EC tries to send
1842                  * these over the regular keyboard, so these are no-ops,
1843                  * but there are still weird bugs re. MUTE, so do not
1844                  * change unless you get test reports from all Lenovo
1845                  * models.  May cause the BIOS to interfere with the
1846                  * HDA mixer.
1847                  */
1848                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1849                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1850                 KEY_RESERVED,   /* 0x16: MUTE */
1851
1852                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1853
1854                 /* (assignments unknown, please report if found) */
1855                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1856                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1857         };
1858
1859 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
1860 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
1861 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
1862
1863         int res, i;
1864         int status;
1865         int hkeyv;
1866
1867         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1868
1869         BUG_ON(!tpacpi_inputdev);
1870         BUG_ON(tpacpi_inputdev->open != NULL ||
1871                tpacpi_inputdev->close != NULL);
1872
1873         TPACPI_ACPIHANDLE_INIT(hkey);
1874         mutex_init(&hotkey_mutex);
1875
1876 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1877         mutex_init(&hotkey_thread_mutex);
1878         mutex_init(&hotkey_thread_data_mutex);
1879 #endif
1880
1881         /* hotkey not supported on 570 */
1882         tp_features.hotkey = hkey_handle != NULL;
1883
1884         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1885                 str_supported(tp_features.hotkey));
1886
1887         if (tp_features.hotkey) {
1888                 hotkey_dev_attributes = create_attr_set(12, NULL);
1889                 if (!hotkey_dev_attributes)
1890                         return -ENOMEM;
1891                 res = add_many_to_attr_set(hotkey_dev_attributes,
1892                                 hotkey_attributes,
1893                                 ARRAY_SIZE(hotkey_attributes));
1894                 if (res)
1895                         return res;
1896
1897                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1898                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
1899                    for HKEY interface version 0x100 */
1900                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1901                         if ((hkeyv >> 8) != 1) {
1902                                 printk(TPACPI_ERR "unknown version of the "
1903                                        "HKEY interface: 0x%x\n", hkeyv);
1904                                 printk(TPACPI_ERR "please report this to %s\n",
1905                                        TPACPI_MAIL);
1906                         } else {
1907                                 /*
1908                                  * MHKV 0x100 in A31, R40, R40e,
1909                                  * T4x, X31, and later
1910                                  */
1911                                 tp_features.hotkey_mask = 1;
1912                         }
1913                 }
1914
1915                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1916                         str_supported(tp_features.hotkey_mask));
1917
1918                 if (tp_features.hotkey_mask) {
1919                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1920                                         "MHKA", "qd")) {
1921                                 printk(TPACPI_ERR
1922                                        "missing MHKA handler, "
1923                                        "please report this to %s\n",
1924                                        TPACPI_MAIL);
1925                                 /* FN+F12, FN+F4, FN+F3 */
1926                                 hotkey_all_mask = 0x080cU;
1927                         }
1928                 }
1929
1930                 /* hotkey_source_mask *must* be zero for
1931                  * the first hotkey_mask_get */
1932                 res = hotkey_status_get(&hotkey_orig_status);
1933                 if (!res && tp_features.hotkey_mask) {
1934                         res = hotkey_mask_get();
1935                         hotkey_orig_mask = hotkey_mask;
1936                         if (!res) {
1937                                 res = add_many_to_attr_set(
1938                                         hotkey_dev_attributes,
1939                                         hotkey_mask_attributes,
1940                                         ARRAY_SIZE(hotkey_mask_attributes));
1941                         }
1942                 }
1943
1944 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1945                 if (tp_features.hotkey_mask) {
1946                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
1947                                                 & ~hotkey_all_mask;
1948                 } else {
1949                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
1950                 }
1951
1952                 vdbg_printk(TPACPI_DBG_INIT,
1953                             "hotkey source mask 0x%08x, polling freq %d\n",
1954                             hotkey_source_mask, hotkey_poll_freq);
1955 #endif
1956
1957                 /* Not all thinkpads have a hardware radio switch */
1958                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1959                         tp_features.hotkey_wlsw = 1;
1960                         printk(TPACPI_INFO
1961                                 "radio switch found; radios are %s\n",
1962                                 enabled(status, 0));
1963                         res = add_to_attr_set(hotkey_dev_attributes,
1964                                         &dev_attr_hotkey_radio_sw.attr);
1965                 }
1966
1967                 if (!res)
1968                         res = register_attr_set_with_sysfs(
1969                                         hotkey_dev_attributes,
1970                                         &tpacpi_pdev->dev.kobj);
1971                 if (res)
1972                         return res;
1973
1974                 /* Set up key map */
1975
1976                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1977                                                 GFP_KERNEL);
1978                 if (!hotkey_keycode_map) {
1979                         printk(TPACPI_ERR
1980                                 "failed to allocate memory for key map\n");
1981                         return -ENOMEM;
1982                 }
1983
1984                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1985                         dbg_printk(TPACPI_DBG_INIT,
1986                                    "using Lenovo default hot key map\n");
1987                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1988                                 TPACPI_HOTKEY_MAP_SIZE);
1989                 } else {
1990                         dbg_printk(TPACPI_DBG_INIT,
1991                                    "using IBM default hot key map\n");
1992                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1993                                 TPACPI_HOTKEY_MAP_SIZE);
1994                 }
1995
1996                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1997                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1998                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1999                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2000                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2001                 tpacpi_inputdev->keycode = hotkey_keycode_map;
2002                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2003                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
2004                                 set_bit(hotkey_keycode_map[i],
2005                                         tpacpi_inputdev->keybit);
2006                         } else {
2007                                 if (i < sizeof(hotkey_reserved_mask)*8)
2008                                         hotkey_reserved_mask |= 1 << i;
2009                         }
2010                 }
2011
2012                 if (tp_features.hotkey_wlsw) {
2013                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2014                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2015                 }
2016
2017                 dbg_printk(TPACPI_DBG_INIT,
2018                                 "enabling hot key handling\n");
2019                 res = hotkey_status_set(1);
2020                 if (res)
2021                         return res;
2022                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2023                                         & ~hotkey_reserved_mask)
2024                                         | hotkey_orig_mask);
2025                 if (res < 0 && res != -ENXIO)
2026                         return res;
2027
2028                 dbg_printk(TPACPI_DBG_INIT,
2029                                 "legacy hot key reporting over procfs %s\n",
2030                                 (hotkey_report_mode < 2) ?
2031                                         "enabled" : "disabled");
2032
2033                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2034                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2035
2036                 hotkey_poll_setup_safe(1);
2037                 tpacpi_input_send_radiosw();
2038         }
2039
2040         return (tp_features.hotkey)? 0 : 1;
2041 }
2042
2043 static void hotkey_exit(void)
2044 {
2045 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2046         hotkey_poll_stop_sync();
2047 #endif
2048
2049         if (tp_features.hotkey) {
2050                 dbg_printk(TPACPI_DBG_EXIT,
2051                            "restoring original hot key mask\n");
2052                 /* no short-circuit boolean operator below! */
2053                 if ((hotkey_mask_set(hotkey_orig_mask) |
2054                      hotkey_status_set(hotkey_orig_status)) != 0)
2055                         printk(TPACPI_ERR
2056                                "failed to restore hot key mask "
2057                                "to BIOS defaults\n");
2058         }
2059
2060         if (hotkey_dev_attributes) {
2061                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2062                 hotkey_dev_attributes = NULL;
2063         }
2064 }
2065
2066 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2067 {
2068         u32 hkey;
2069         unsigned int scancode;
2070         int send_acpi_ev;
2071         int ignore_acpi_ev;
2072         int unk_ev;
2073
2074         if (event != 0x80) {
2075                 printk(TPACPI_ERR
2076                        "unknown HKEY notification event %d\n", event);
2077                 /* forward it to userspace, maybe it knows how to handle it */
2078                 acpi_bus_generate_netlink_event(
2079                                         ibm->acpi->device->pnp.device_class,
2080                                         ibm->acpi->device->dev.bus_id,
2081                                         event, 0);
2082                 return;
2083         }
2084
2085         while (1) {
2086                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2087                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2088                         return;
2089                 }
2090
2091                 if (hkey == 0) {
2092                         /* queue empty */
2093                         return;
2094                 }
2095
2096                 send_acpi_ev = 1;
2097                 ignore_acpi_ev = 0;
2098                 unk_ev = 0;
2099
2100                 switch (hkey >> 12) {
2101                 case 1:
2102                         /* 0x1000-0x1FFF: key presses */
2103                         scancode = hkey & 0xfff;
2104                         if (scancode > 0 && scancode < 0x21) {
2105                                 scancode--;
2106                                 if (!(hotkey_source_mask & (1 << scancode))) {
2107                                         tpacpi_input_send_key(scancode);
2108                                         send_acpi_ev = 0;
2109                                 } else {
2110                                         ignore_acpi_ev = 1;
2111                                 }
2112                         } else {
2113                                 unk_ev = 1;
2114                         }
2115                         break;
2116                 case 2:
2117                         /* Wakeup reason */
2118                         switch (hkey) {
2119                         case 0x2304: /* suspend, undock */
2120                         case 0x2404: /* hibernation, undock */
2121                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2122                                 ignore_acpi_ev = 1;
2123                                 break;
2124                         case 0x2305: /* suspend, bay eject */
2125                         case 0x2405: /* hibernation, bay eject */
2126                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2127                                 ignore_acpi_ev = 1;
2128                                 break;
2129                         default:
2130                                 unk_ev = 1;
2131                         }
2132                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2133                                 printk(TPACPI_INFO
2134                                        "woke up due to a hot-unplug "
2135                                        "request...\n");
2136                                 hotkey_wakeup_reason_notify_change();
2137                         }
2138                         break;
2139                 case 3:
2140                         /* bay-related wakeups */
2141                         if (hkey == 0x3003) {
2142                                 hotkey_autosleep_ack = 1;
2143                                 printk(TPACPI_INFO
2144                                        "bay ejected\n");
2145                                 hotkey_wakeup_hotunplug_complete_notify_change();
2146                         } else {
2147                                 unk_ev = 1;
2148                         }
2149                         break;
2150                 case 4:
2151                         /* dock-related wakeups */
2152                         if (hkey == 0x4003) {
2153                                 hotkey_autosleep_ack = 1;
2154                                 printk(TPACPI_INFO
2155                                        "undocked\n");
2156                                 hotkey_wakeup_hotunplug_complete_notify_change();
2157                         } else {
2158                                 unk_ev = 1;
2159                         }
2160                         break;
2161                 case 5:
2162                         /* 0x5000-0x5FFF: human interface helpers */
2163                         switch (hkey) {
2164                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2165                         case 0x5009: /* X61t: swivel up (tablet mode) */
2166                         case 0x500a: /* X61t: swivel down (normal mode) */
2167                         case 0x500b: /* X61t: tablet pen inserted into bay */
2168                         case 0x500c: /* X61t: tablet pen removed from bay */
2169                                 break;
2170                         case 0x5001:
2171                         case 0x5002:
2172                                 /* LID switch events.  Do not propagate */
2173                                 ignore_acpi_ev = 1;
2174                                 break;
2175                         default:
2176                                 unk_ev = 1;
2177                         }
2178                         break;
2179                 case 7:
2180                         /* 0x7000-0x7FFF: misc */
2181                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2182                                 tpacpi_input_send_radiosw();
2183                                 hotkey_radio_sw_notify_change();
2184                                 send_acpi_ev = 0;
2185                                 break;
2186                         }
2187                         /* fallthrough to default */
2188                 default:
2189                         unk_ev = 1;
2190                 }
2191                 if (unk_ev) {
2192                         printk(TPACPI_NOTICE
2193                                "unhandled HKEY event 0x%04x\n", hkey);
2194                 }
2195
2196                 /* Legacy events */
2197                 if (!ignore_acpi_ev &&
2198                     (send_acpi_ev || hotkey_report_mode < 2)) {
2199                         acpi_bus_generate_proc_event(ibm->acpi->device,
2200                                                      event, hkey);
2201                 }
2202
2203                 /* netlink events */
2204                 if (!ignore_acpi_ev && send_acpi_ev) {
2205                         acpi_bus_generate_netlink_event(
2206                                         ibm->acpi->device->pnp.device_class,
2207                                         ibm->acpi->device->dev.bus_id,
2208                                         event, hkey);
2209                 }
2210         }
2211 }
2212
2213 static void hotkey_suspend(pm_message_t state)
2214 {
2215         /* Do these on suspend, we get the events on early resume! */
2216         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2217         hotkey_autosleep_ack = 0;
2218 }
2219
2220 static void hotkey_resume(void)
2221 {
2222         if (hotkey_mask_get())
2223                 printk(TPACPI_ERR
2224                        "error while trying to read hot key mask "
2225                        "from firmware\n");
2226         tpacpi_input_send_radiosw();
2227         hotkey_radio_sw_notify_change();
2228         hotkey_wakeup_reason_notify_change();
2229         hotkey_wakeup_hotunplug_complete_notify_change();
2230         hotkey_poll_setup_safe(0);
2231 }
2232
2233 /* procfs -------------------------------------------------------------- */
2234 static int hotkey_read(char *p)
2235 {
2236         int res, status;
2237         int len = 0;
2238
2239         if (!tp_features.hotkey) {
2240                 len += sprintf(p + len, "status:\t\tnot supported\n");
2241                 return len;
2242         }
2243
2244         if (mutex_lock_interruptible(&hotkey_mutex))
2245                 return -ERESTARTSYS;
2246         res = hotkey_status_get(&status);
2247         if (!res)
2248                 res = hotkey_mask_get();
2249         mutex_unlock(&hotkey_mutex);
2250         if (res)
2251                 return res;
2252
2253         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2254         if (tp_features.hotkey_mask) {
2255                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2256                 len += sprintf(p + len,
2257                                "commands:\tenable, disable, reset, <mask>\n");
2258         } else {
2259                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2260                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2261         }
2262
2263         return len;
2264 }
2265
2266 static int hotkey_write(char *buf)
2267 {
2268         int res, status;
2269         u32 mask;
2270         char *cmd;
2271
2272         if (!tp_features.hotkey)
2273                 return -ENODEV;
2274
2275         if (mutex_lock_interruptible(&hotkey_mutex))
2276                 return -ERESTARTSYS;
2277
2278         status = -1;
2279         mask = hotkey_mask;
2280
2281         res = 0;
2282         while ((cmd = next_cmd(&buf))) {
2283                 if (strlencmp(cmd, "enable") == 0) {
2284                         status = 1;
2285                 } else if (strlencmp(cmd, "disable") == 0) {
2286                         status = 0;
2287                 } else if (strlencmp(cmd, "reset") == 0) {
2288                         status = hotkey_orig_status;
2289                         mask = hotkey_orig_mask;
2290                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2291                         /* mask set */
2292                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2293                         /* mask set */
2294                 } else {
2295                         res = -EINVAL;
2296                         goto errexit;
2297                 }
2298         }
2299         if (status != -1)
2300                 res = hotkey_status_set(status);
2301
2302         if (!res && mask != hotkey_mask)
2303                 res = hotkey_mask_set(mask);
2304
2305 errexit:
2306         mutex_unlock(&hotkey_mutex);
2307         return res;
2308 }
2309
2310 static const struct acpi_device_id ibm_htk_device_ids[] = {
2311         {TPACPI_ACPI_HKEY_HID, 0},
2312         {"", 0},
2313 };
2314
2315 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2316         .hid = ibm_htk_device_ids,
2317         .notify = hotkey_notify,
2318         .handle = &hkey_handle,
2319         .type = ACPI_DEVICE_NOTIFY,
2320 };
2321
2322 static struct ibm_struct hotkey_driver_data = {
2323         .name = "hotkey",
2324         .read = hotkey_read,
2325         .write = hotkey_write,
2326         .exit = hotkey_exit,
2327         .resume = hotkey_resume,
2328         .suspend = hotkey_suspend,
2329         .acpi = &ibm_hotkey_acpidriver,
2330 };
2331
2332 /*************************************************************************
2333  * Bluetooth subdriver
2334  */
2335
2336 enum {
2337         /* ACPI GBDC/SBDC bits */
2338         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2339         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2340         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2341 };
2342
2343 static int bluetooth_get_radiosw(void);
2344 static int bluetooth_set_radiosw(int radio_on);
2345
2346 /* sysfs bluetooth enable ---------------------------------------------- */
2347 static ssize_t bluetooth_enable_show(struct device *dev,
2348                            struct device_attribute *attr,
2349                            char *buf)
2350 {
2351         int status;
2352
2353         status = bluetooth_get_radiosw();
2354         if (status < 0)
2355                 return status;
2356
2357         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2358 }
2359
2360 static ssize_t bluetooth_enable_store(struct device *dev,
2361                             struct device_attribute *attr,
2362                             const char *buf, size_t count)
2363 {
2364         unsigned long t;
2365         int res;
2366
2367         if (parse_strtoul(buf, 1, &t))
2368                 return -EINVAL;
2369
2370         res = bluetooth_set_radiosw(t);
2371
2372         return (res) ? res : count;
2373 }
2374
2375 static struct device_attribute dev_attr_bluetooth_enable =
2376         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2377                 bluetooth_enable_show, bluetooth_enable_store);
2378
2379 /* --------------------------------------------------------------------- */
2380
2381 static struct attribute *bluetooth_attributes[] = {
2382         &dev_attr_bluetooth_enable.attr,
2383         NULL
2384 };
2385
2386 static const struct attribute_group bluetooth_attr_group = {
2387         .attrs = bluetooth_attributes,
2388 };
2389
2390 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2391 {
2392         int res;
2393         int status = 0;
2394
2395         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2396
2397         TPACPI_ACPIHANDLE_INIT(hkey);
2398
2399         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2400            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2401         tp_features.bluetooth = hkey_handle &&
2402             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2403
2404         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2405                 str_supported(tp_features.bluetooth),
2406                 status);
2407
2408         if (tp_features.bluetooth) {
2409                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2410                         /* no bluetooth hardware present in system */
2411                         tp_features.bluetooth = 0;
2412                         dbg_printk(TPACPI_DBG_INIT,
2413                                    "bluetooth hardware not installed\n");
2414                 } else {
2415                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2416                                         &bluetooth_attr_group);
2417                         if (res)
2418                                 return res;
2419                 }
2420         }
2421
2422         return (tp_features.bluetooth)? 0 : 1;
2423 }
2424
2425 static void bluetooth_exit(void)
2426 {
2427         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2428                         &bluetooth_attr_group);
2429 }
2430
2431 static int bluetooth_get_radiosw(void)
2432 {
2433         int status;
2434
2435         if (!tp_features.bluetooth)
2436                 return -ENODEV;
2437
2438         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2439                 return -EIO;
2440
2441         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2442 }
2443
2444 static int bluetooth_set_radiosw(int radio_on)
2445 {
2446         int status;
2447
2448         if (!tp_features.bluetooth)
2449                 return -ENODEV;
2450
2451         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2452                 return -EIO;
2453         if (radio_on)
2454                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2455         else
2456                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2457         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2458                 return -EIO;
2459
2460         return 0;
2461 }
2462
2463 /* procfs -------------------------------------------------------------- */
2464 static int bluetooth_read(char *p)
2465 {
2466         int len = 0;
2467         int status = bluetooth_get_radiosw();
2468
2469         if (!tp_features.bluetooth)
2470                 len += sprintf(p + len, "status:\t\tnot supported\n");
2471         else {
2472                 len += sprintf(p + len, "status:\t\t%s\n",
2473                                 (status)? "enabled" : "disabled");
2474                 len += sprintf(p + len, "commands:\tenable, disable\n");
2475         }
2476
2477         return len;
2478 }
2479
2480 static int bluetooth_write(char *buf)
2481 {
2482         char *cmd;
2483
2484         if (!tp_features.bluetooth)
2485                 return -ENODEV;
2486
2487         while ((cmd = next_cmd(&buf))) {
2488                 if (strlencmp(cmd, "enable") == 0) {
2489                         bluetooth_set_radiosw(1);
2490                 } else if (strlencmp(cmd, "disable") == 0) {
2491                         bluetooth_set_radiosw(0);
2492                 } else
2493                         return -EINVAL;
2494         }
2495
2496         return 0;
2497 }
2498
2499 static struct ibm_struct bluetooth_driver_data = {
2500         .name = "bluetooth",
2501         .read = bluetooth_read,
2502         .write = bluetooth_write,
2503         .exit = bluetooth_exit,
2504 };
2505
2506 /*************************************************************************
2507  * Wan subdriver
2508  */
2509
2510 enum {
2511         /* ACPI GWAN/SWAN bits */
2512         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2513         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2514         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2515 };
2516
2517 static int wan_get_radiosw(void);
2518 static int wan_set_radiosw(int radio_on);
2519
2520 /* sysfs wan enable ---------------------------------------------------- */
2521 static ssize_t wan_enable_show(struct device *dev,
2522                            struct device_attribute *attr,
2523                            char *buf)
2524 {
2525         int status;
2526
2527         status = wan_get_radiosw();
2528         if (status < 0)
2529                 return status;
2530
2531         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2532 }
2533
2534 static ssize_t wan_enable_store(struct device *dev,
2535                             struct device_attribute *attr,
2536                             const char *buf, size_t count)
2537 {
2538         unsigned long t;
2539         int res;
2540
2541         if (parse_strtoul(buf, 1, &t))
2542                 return -EINVAL;
2543
2544         res = wan_set_radiosw(t);
2545
2546         return (res) ? res : count;
2547 }
2548
2549 static struct device_attribute dev_attr_wan_enable =
2550         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2551                 wan_enable_show, wan_enable_store);
2552
2553 /* --------------------------------------------------------------------- */
2554
2555 static struct attribute *wan_attributes[] = {
2556         &dev_attr_wan_enable.attr,
2557         NULL
2558 };
2559
2560 static const struct attribute_group wan_attr_group = {
2561         .attrs = wan_attributes,
2562 };
2563
2564 static int __init wan_init(struct ibm_init_struct *iibm)
2565 {
2566         int res;
2567         int status = 0;
2568
2569         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2570
2571         TPACPI_ACPIHANDLE_INIT(hkey);
2572
2573         tp_features.wan = hkey_handle &&
2574             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2575
2576         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2577                 str_supported(tp_features.wan),
2578                 status);
2579
2580         if (tp_features.wan) {
2581                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2582                         /* no wan hardware present in system */
2583                         tp_features.wan = 0;
2584                         dbg_printk(TPACPI_DBG_INIT,
2585                                    "wan hardware not installed\n");
2586                 } else {
2587                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2588                                         &wan_attr_group);
2589                         if (res)
2590                                 return res;
2591                 }
2592         }
2593
2594         return (tp_features.wan)? 0 : 1;
2595 }
2596
2597 static void wan_exit(void)
2598 {
2599         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2600                 &wan_attr_group);
2601 }
2602
2603 static int wan_get_radiosw(void)
2604 {
2605         int status;
2606
2607         if (!tp_features.wan)
2608                 return -ENODEV;
2609
2610         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2611                 return -EIO;
2612
2613         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2614 }
2615
2616 static int wan_set_radiosw(int radio_on)
2617 {
2618         int status;
2619
2620         if (!tp_features.wan)
2621                 return -ENODEV;
2622
2623         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2624                 return -EIO;
2625         if (radio_on)
2626                 status |= TP_ACPI_WANCARD_RADIOSSW;
2627         else
2628                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2629         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2630                 return -EIO;
2631
2632         return 0;
2633 }
2634
2635 /* procfs -------------------------------------------------------------- */
2636 static int wan_read(char *p)
2637 {
2638         int len = 0;
2639         int status = wan_get_radiosw();
2640
2641         if (!tp_features.wan)
2642                 len += sprintf(p + len, "status:\t\tnot supported\n");
2643         else {
2644                 len += sprintf(p + len, "status:\t\t%s\n",
2645                                 (status)? "enabled" : "disabled");
2646                 len += sprintf(p + len, "commands:\tenable, disable\n");
2647         }
2648
2649         return len;
2650 }
2651
2652 static int wan_write(char *buf)
2653 {
2654         char *cmd;
2655
2656         if (!tp_features.wan)
2657                 return -ENODEV;
2658
2659         while ((cmd = next_cmd(&buf))) {
2660                 if (strlencmp(cmd, "enable") == 0) {
2661                         wan_set_radiosw(1);
2662                 } else if (strlencmp(cmd, "disable") == 0) {
2663                         wan_set_radiosw(0);
2664                 } else
2665                         return -EINVAL;
2666         }
2667
2668         return 0;
2669 }
2670
2671 static struct ibm_struct wan_driver_data = {
2672         .name = "wan",
2673         .read = wan_read,
2674         .write = wan_write,
2675         .exit = wan_exit,
2676         .flags.experimental = 1,
2677 };
2678
2679 /*************************************************************************
2680  * Video subdriver
2681  */
2682
2683 enum video_access_mode {
2684         TPACPI_VIDEO_NONE = 0,
2685         TPACPI_VIDEO_570,       /* 570 */
2686         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2687         TPACPI_VIDEO_NEW,       /* all others */
2688 };
2689
2690 enum {  /* video status flags, based on VIDEO_570 */
2691         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2692         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2693         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2694 };
2695
2696 enum {  /* TPACPI_VIDEO_570 constants */
2697         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2698         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2699                                                  * video_status_flags */
2700         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2701         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2702 };
2703
2704 static enum video_access_mode video_supported;
2705 static int video_orig_autosw;
2706
2707 static int video_autosw_get(void);
2708 static int video_autosw_set(int enable);
2709
2710 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
2711            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
2712            "\\_SB.PCI0.VID0",   /* 770e */
2713            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
2714            "\\_SB.PCI0.AGP.VID",        /* all others */
2715            );                           /* R30, R31 */
2716
2717 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2718
2719 static int __init video_init(struct ibm_init_struct *iibm)
2720 {
2721         int ivga;
2722
2723         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2724
2725         TPACPI_ACPIHANDLE_INIT(vid);
2726         TPACPI_ACPIHANDLE_INIT(vid2);
2727
2728         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2729                 /* G41, assume IVGA doesn't change */
2730                 vid_handle = vid2_handle;
2731
2732         if (!vid_handle)
2733                 /* video switching not supported on R30, R31 */
2734                 video_supported = TPACPI_VIDEO_NONE;
2735         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2736                 /* 570 */
2737                 video_supported = TPACPI_VIDEO_570;
2738         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2739                 /* 600e/x, 770e, 770x */
2740                 video_supported = TPACPI_VIDEO_770;
2741         else
2742                 /* all others */
2743                 video_supported = TPACPI_VIDEO_NEW;
2744
2745         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2746                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2747                 video_supported);
2748
2749         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2750 }
2751
2752 static void video_exit(void)
2753 {
2754         dbg_printk(TPACPI_DBG_EXIT,
2755                    "restoring original video autoswitch mode\n");
2756         if (video_autosw_set(video_orig_autosw))
2757                 printk(TPACPI_ERR "error while trying to restore original "
2758                         "video autoswitch mode\n");
2759 }
2760
2761 static int video_outputsw_get(void)
2762 {
2763         int status = 0;
2764         int i;
2765
2766         switch (video_supported) {
2767         case TPACPI_VIDEO_570:
2768                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2769                                  TP_ACPI_VIDEO_570_PHSCMD))
2770                         return -EIO;
2771                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2772                 break;
2773         case TPACPI_VIDEO_770:
2774                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2775                         return -EIO;
2776                 if (i)
2777                         status |= TP_ACPI_VIDEO_S_LCD;
2778                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2779                         return -EIO;
2780                 if (i)
2781                         status |= TP_ACPI_VIDEO_S_CRT;
2782                 break;
2783         case TPACPI_VIDEO_NEW:
2784                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2785                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2786                         return -EIO;
2787                 if (i)
2788                         status |= TP_ACPI_VIDEO_S_CRT;
2789
2790                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2791                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2792                         return -EIO;
2793                 if (i)
2794                         status |= TP_ACPI_VIDEO_S_LCD;
2795                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
2796                         return -EIO;
2797                 if (i)
2798                         status |= TP_ACPI_VIDEO_S_DVI;
2799                 break;
2800         default:
2801                 return -ENOSYS;
2802         }
2803
2804         return status;
2805 }
2806
2807 static int video_outputsw_set(int status)
2808 {
2809         int autosw;
2810         int res = 0;
2811
2812         switch (video_supported) {
2813         case TPACPI_VIDEO_570:
2814                 res = acpi_evalf(NULL, NULL,
2815                                  "\\_SB.PHS2", "vdd",
2816                                  TP_ACPI_VIDEO_570_PHS2CMD,
2817                                  status | TP_ACPI_VIDEO_570_PHS2SET);
2818                 break;
2819         case TPACPI_VIDEO_770:
2820                 autosw = video_autosw_get();
2821                 if (autosw < 0)
2822                         return autosw;
2823
2824                 res = video_autosw_set(1);
2825                 if (res)
2826                         return res;
2827                 res = acpi_evalf(vid_handle, NULL,
2828                                  "ASWT", "vdd", status * 0x100, 0);
2829                 if (!autosw && video_autosw_set(autosw)) {
2830                         printk(TPACPI_ERR
2831                                "video auto-switch left enabled due to error\n");
2832                         return -EIO;
2833                 }
2834                 break;
2835         case TPACPI_VIDEO_NEW:
2836                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
2837                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
2838                 break;
2839         default:
2840                 return -ENOSYS;
2841         }
2842
2843         return (res)? 0 : -EIO;
2844 }
2845
2846 static int video_autosw_get(void)
2847 {
2848         int autosw = 0;
2849
2850         switch (video_supported) {
2851         case TPACPI_VIDEO_570:
2852                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
2853                         return -EIO;
2854                 break;
2855         case TPACPI_VIDEO_770:
2856         case TPACPI_VIDEO_NEW:
2857                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
2858                         return -EIO;
2859                 break;
2860         default:
2861                 return -ENOSYS;
2862         }
2863
2864         return autosw & 1;
2865 }
2866
2867 static int video_autosw_set(int enable)
2868 {
2869         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
2870                 return -EIO;
2871         return 0;
2872 }
2873
2874 static int video_outputsw_cycle(void)
2875 {
2876         int autosw = video_autosw_get();
2877         int res;
2878
2879         if (autosw < 0)
2880                 return autosw;
2881
2882         switch (video_supported) {
2883         case TPACPI_VIDEO_570:
2884                 res = video_autosw_set(1);
2885                 if (res)
2886                         return res;
2887                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
2888                 break;
2889         case TPACPI_VIDEO_770:
2890         case TPACPI_VIDEO_NEW:
2891                 res = video_autosw_set(1);
2892                 if (res)
2893                         return res;
2894                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
2895                 break;
2896         default:
2897                 return -ENOSYS;
2898         }
2899         if (!autosw && video_autosw_set(autosw)) {
2900                 printk(TPACPI_ERR
2901                        "video auto-switch left enabled due to error\n");
2902                 return -EIO;
2903         }
2904
2905         return (res)? 0 : -EIO;
2906 }
2907
2908 static int video_expand_toggle(void)
2909 {
2910         switch (video_supported) {
2911         case TPACPI_VIDEO_570:
2912                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
2913                         0 : -EIO;
2914         case TPACPI_VIDEO_770:
2915                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
2916                         0 : -EIO;
2917         case TPACPI_VIDEO_NEW:
2918                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
2919                         0 : -EIO;
2920         default:
2921                 return -ENOSYS;
2922         }
2923         /* not reached */
2924 }
2925
2926 static int video_read(char *p)
2927 {
2928         int status, autosw;
2929         int len = 0;
2930
2931         if (video_supported == TPACPI_VIDEO_NONE) {
2932                 len += sprintf(p + len, "status:\t\tnot supported\n");
2933                 return len;
2934         }
2935
2936         status = video_outputsw_get();
2937         if (status < 0)
2938                 return status;
2939
2940         autosw = video_autosw_get();
2941         if (autosw < 0)
2942                 return autosw;
2943
2944         len += sprintf(p + len, "status:\t\tsupported\n");
2945         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
2946         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
2947         if (video_supported == TPACPI_VIDEO_NEW)
2948                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
2949         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
2950         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
2951         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
2952         if (video_supported == TPACPI_VIDEO_NEW)
2953                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
2954         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
2955         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
2956
2957         return len;
2958 }
2959
2960 static int video_write(char *buf)
2961 {
2962         char *cmd;
2963         int enable, disable, status;
2964         int res;
2965
2966         if (video_supported == TPACPI_VIDEO_NONE)
2967                 return -ENODEV;
2968
2969         enable = 0;
2970         disable = 0;
2971
2972         while ((cmd = next_cmd(&buf))) {
2973                 if (strlencmp(cmd, "lcd_enable") == 0) {
2974                         enable |= TP_ACPI_VIDEO_S_LCD;
2975                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2976                         disable |= TP_ACPI_VIDEO_S_LCD;
2977                 } else if (strlencmp(cmd, "crt_enable") == 0) {
2978                         enable |= TP_ACPI_VIDEO_S_CRT;
2979                 } else if (strlencmp(cmd, "crt_disable") == 0) {
2980                         disable |= TP_ACPI_VIDEO_S_CRT;
2981                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2982                            strlencmp(cmd, "dvi_enable") == 0) {
2983                         enable |= TP_ACPI_VIDEO_S_DVI;
2984                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2985                            strlencmp(cmd, "dvi_disable") == 0) {
2986                         disable |= TP_ACPI_VIDEO_S_DVI;
2987                 } else if (strlencmp(cmd, "auto_enable") == 0) {
2988                         res = video_autosw_set(1);
2989                         if (res)
2990                                 return res;
2991                 } else if (strlencmp(cmd, "auto_disable") == 0) {
2992                         res = video_autosw_set(0);
2993                         if (res)
2994                                 return res;
2995                 } else if (strlencmp(cmd, "video_switch") == 0) {
2996                         res = video_outputsw_cycle();
2997                         if (res)
2998                                 return res;
2999                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3000                         res = video_expand_toggle();
3001                         if (res)
3002                                 return res;
3003                 } else
3004                         return -EINVAL;
3005         }
3006
3007         if (enable || disable) {
3008                 status = video_outputsw_get();
3009                 if (status < 0)
3010                         return status;
3011                 res = video_outputsw_set((status & ~disable) | enable);
3012                 if (res)
3013                         return res;
3014         }
3015
3016         return 0;
3017 }
3018
3019 static struct ibm_struct video_driver_data = {
3020         .name = "video",
3021         .read = video_read,
3022         .write = video_write,
3023         .exit = video_exit,
3024 };
3025
3026 /*************************************************************************
3027  * Light (thinklight) subdriver
3028  */
3029
3030 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3031 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3032
3033 static int __init light_init(struct ibm_init_struct *iibm)
3034 {
3035         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3036
3037         TPACPI_ACPIHANDLE_INIT(ledb);
3038         TPACPI_ACPIHANDLE_INIT(lght);
3039         TPACPI_ACPIHANDLE_INIT(cmos);
3040
3041         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3042         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3043
3044         if (tp_features.light)
3045                 /* light status not supported on
3046                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3047                 tp_features.light_status =
3048                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3049
3050         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3051                 str_supported(tp_features.light));
3052
3053         return (tp_features.light)? 0 : 1;
3054 }
3055
3056 static int light_read(char *p)
3057 {
3058         int len = 0;
3059         int status = 0;
3060
3061         if (!tp_features.light) {
3062                 len += sprintf(p + len, "status:\t\tnot supported\n");
3063         } else if (!tp_features.light_status) {
3064                 len += sprintf(p + len, "status:\t\tunknown\n");
3065                 len += sprintf(p + len, "commands:\ton, off\n");
3066         } else {
3067                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3068                         return -EIO;
3069                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3070                 len += sprintf(p + len, "commands:\ton, off\n");
3071         }
3072
3073         return len;
3074 }
3075
3076 static int light_write(char *buf)
3077 {
3078         int cmos_cmd, lght_cmd;
3079         char *cmd;
3080         int success;
3081
3082         if (!tp_features.light)
3083                 return -ENODEV;
3084
3085         while ((cmd = next_cmd(&buf))) {
3086                 if (strlencmp(cmd, "on") == 0) {
3087                         cmos_cmd = 0x0c;
3088                         lght_cmd = 1;
3089                 } else if (strlencmp(cmd, "off") == 0) {
3090                         cmos_cmd = 0x0d;
3091                         lght_cmd = 0;
3092                 } else
3093                         return -EINVAL;
3094
3095                 success = cmos_handle ?
3096                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3097                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3098                 if (!success)
3099                         return -EIO;
3100         }
3101
3102         return 0;
3103 }
3104
3105 static struct ibm_struct light_driver_data = {
3106         .name = "light",
3107         .read = light_read,
3108         .write = light_write,
3109 };
3110
3111 /*************************************************************************
3112  * Dock subdriver
3113  */
3114
3115 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3116
3117 static void dock_notify(struct ibm_struct *ibm, u32 event);
3118 static int dock_read(char *p);
3119 static int dock_write(char *buf);
3120
3121 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3122            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3123            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3124            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3125     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3126
3127 /* don't list other alternatives as we install a notify handler on the 570 */
3128 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3129
3130 static const struct acpi_device_id ibm_pci_device_ids[] = {
3131         {PCI_ROOT_HID_STRING, 0},
3132         {"", 0},
3133 };
3134
3135 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3136         {
3137          .notify = dock_notify,
3138          .handle = &dock_handle,
3139          .type = ACPI_SYSTEM_NOTIFY,
3140         },
3141         {
3142         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3143          * We just use it to get notifications of dock hotplug
3144          * in very old thinkpads */
3145          .hid = ibm_pci_device_ids,
3146          .notify = dock_notify,
3147          .handle = &pci_handle,
3148          .type = ACPI_SYSTEM_NOTIFY,
3149         },
3150 };
3151
3152 static struct ibm_struct dock_driver_data[2] = {
3153         {
3154          .name = "dock",
3155          .read = dock_read,
3156          .write = dock_write,
3157          .acpi = &ibm_dock_acpidriver[0],
3158         },
3159         {
3160          .name = "dock",
3161          .acpi = &ibm_dock_acpidriver[1],
3162         },
3163 };
3164
3165 #define dock_docked() (_sta(dock_handle) & 1)
3166
3167 static int __init dock_init(struct ibm_init_struct *iibm)
3168 {
3169         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3170
3171         TPACPI_ACPIHANDLE_INIT(dock);
3172
3173         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3174                 str_supported(dock_handle != NULL));
3175
3176         return (dock_handle)? 0 : 1;
3177 }
3178
3179 static int __init dock_init2(struct ibm_init_struct *iibm)
3180 {
3181         int dock2_needed;
3182
3183         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3184
3185         if (dock_driver_data[0].flags.acpi_driver_registered &&
3186             dock_driver_data[0].flags.acpi_notify_installed) {
3187                 TPACPI_ACPIHANDLE_INIT(pci);
3188                 dock2_needed = (pci_handle != NULL);
3189                 vdbg_printk(TPACPI_DBG_INIT,
3190                             "dock PCI handler for the TP 570 is %s\n",
3191                             str_supported(dock2_needed));
3192         } else {
3193                 vdbg_printk(TPACPI_DBG_INIT,
3194                 "dock subdriver part 2 not required\n");
3195                 dock2_needed = 0;
3196         }
3197
3198         return (dock2_needed)? 0 : 1;
3199 }
3200
3201 static void dock_notify(struct ibm_struct *ibm, u32 event)
3202 {
3203         int docked = dock_docked();
3204         int pci = ibm->acpi->hid && ibm->acpi->device &&
3205                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3206         int data;
3207
3208         if (event == 1 && !pci) /* 570 */
3209                 data = 1;       /* button */
3210         else if (event == 1 && pci)     /* 570 */
3211                 data = 3;       /* dock */
3212         else if (event == 3 && docked)
3213                 data = 1;       /* button */
3214         else if (event == 3 && !docked)
3215                 data = 2;       /* undock */
3216         else if (event == 0 && docked)
3217                 data = 3;       /* dock */
3218         else {
3219                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3220                        event, _sta(dock_handle));
3221                 data = 0;       /* unknown */
3222         }
3223         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3224         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3225                                           ibm->acpi->device->dev.bus_id,
3226                                           event, data);
3227 }
3228
3229 static int dock_read(char *p)
3230 {
3231         int len = 0;
3232         int docked = dock_docked();
3233
3234         if (!dock_handle)
3235                 len += sprintf(p + len, "status:\t\tnot supported\n");
3236         else if (!docked)
3237                 len += sprintf(p + len, "status:\t\tundocked\n");
3238         else {
3239                 len += sprintf(p + len, "status:\t\tdocked\n");
3240                 len += sprintf(p + len, "commands:\tdock, undock\n");
3241         }
3242
3243         return len;
3244 }
3245
3246 static int dock_write(char *buf)
3247 {
3248         char *cmd;
3249
3250         if (!dock_docked())
3251                 return -ENODEV;
3252
3253         while ((cmd = next_cmd(&buf))) {
3254                 if (strlencmp(cmd, "undock") == 0) {
3255                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3256                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3257                                 return -EIO;
3258                 } else if (strlencmp(cmd, "dock") == 0) {
3259                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3260                                 return -EIO;
3261                 } else
3262                         return -EINVAL;
3263         }
3264
3265         return 0;
3266 }
3267
3268 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3269
3270 /*************************************************************************
3271  * Bay subdriver
3272  */
3273
3274 #ifdef CONFIG_THINKPAD_ACPI_BAY
3275
3276 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3277            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3278            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3279            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3280            );                           /* A21e, R30, R31 */
3281 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3282            "_EJ0",              /* all others */
3283            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3284 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3285            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3286            );                           /* all others */
3287 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3288            "_EJ0",                      /* 770x */
3289            );                           /* all others */
3290
3291 static int __init bay_init(struct ibm_init_struct *iibm)
3292 {
3293         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3294
3295         TPACPI_ACPIHANDLE_INIT(bay);
3296         if (bay_handle)
3297                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3298         TPACPI_ACPIHANDLE_INIT(bay2);
3299         if (bay2_handle)
3300                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3301
3302         tp_features.bay_status = bay_handle &&
3303                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3304         tp_features.bay_status2 = bay2_handle &&
3305                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3306
3307         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3308                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3309         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3310                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3311
3312         vdbg_printk(TPACPI_DBG_INIT,
3313                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3314                 str_supported(tp_features.bay_status),
3315                 str_supported(tp_features.bay_eject),
3316                 str_supported(tp_features.bay_status2),
3317                 str_supported(tp_features.bay_eject2));
3318
3319         return (tp_features.bay_status || tp_features.bay_eject ||
3320                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3321 }
3322
3323 static void bay_notify(struct ibm_struct *ibm, u32 event)
3324 {
3325         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3326         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3327                                           ibm->acpi->device->dev.bus_id,
3328                                           event, 0);
3329 }
3330
3331 #define bay_occupied(b) (_sta(b##_handle) & 1)
3332
3333 static int bay_read(char *p)
3334 {
3335         int len = 0;
3336         int occupied = bay_occupied(bay);
3337         int occupied2 = bay_occupied(bay2);
3338         int eject, eject2;
3339
3340         len += sprintf(p + len, "status:\t\t%s\n",
3341                 tp_features.bay_status ?
3342                         (occupied ? "occupied" : "unoccupied") :
3343                                 "not supported");
3344         if (tp_features.bay_status2)
3345                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3346                                "occupied" : "unoccupied");
3347
3348         eject = tp_features.bay_eject && occupied;
3349         eject2 = tp_features.bay_eject2 && occupied2;
3350
3351         if (eject && eject2)
3352                 len += sprintf(p + len, "commands:\teject, eject2\n");
3353         else if (eject)
3354                 len += sprintf(p + len, "commands:\teject\n");
3355         else if (eject2)
3356                 len += sprintf(p + len, "commands:\teject2\n");
3357
3358         return len;
3359 }
3360
3361 static int bay_write(char *buf)
3362 {
3363         char *cmd;
3364
3365         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3366                 return -ENODEV;
3367
3368         while ((cmd = next_cmd(&buf))) {
3369                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3370                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3371                                 return -EIO;
3372                 } else if (tp_features.bay_eject2 &&
3373                            strlencmp(cmd, "eject2") == 0) {
3374                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3375                                 return -EIO;
3376                 } else
3377                         return -EINVAL;
3378         }
3379
3380         return 0;
3381 }
3382
3383 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3384         .notify = bay_notify,
3385         .handle = &bay_handle,
3386         .type = ACPI_SYSTEM_NOTIFY,
3387 };
3388
3389 static struct ibm_struct bay_driver_data = {
3390         .name = "bay",
3391         .read = bay_read,
3392         .write = bay_write,
3393         .acpi = &ibm_bay_acpidriver,
3394 };
3395
3396 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3397
3398 /*************************************************************************
3399  * CMOS subdriver
3400  */
3401
3402 /* sysfs cmos_command -------------------------------------------------- */
3403 static ssize_t cmos_command_store(struct device *dev,
3404                             struct device_attribute *attr,
3405                             const char *buf, size_t count)
3406 {
3407         unsigned long cmos_cmd;
3408         int res;
3409
3410         if (parse_strtoul(buf, 21, &cmos_cmd))
3411                 return -EINVAL;
3412
3413         res = issue_thinkpad_cmos_command(cmos_cmd);
3414         return (res)? res : count;
3415 }
3416
3417 static struct device_attribute dev_attr_cmos_command =
3418         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3419
3420 /* --------------------------------------------------------------------- */
3421
3422 static int __init cmos_init(struct ibm_init_struct *iibm)
3423 {
3424         int res;
3425
3426         vdbg_printk(TPACPI_DBG_INIT,
3427                 "initializing cmos commands subdriver\n");
3428
3429         TPACPI_ACPIHANDLE_INIT(cmos);
3430
3431         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3432                 str_supported(cmos_handle != NULL));
3433
3434         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3435         if (res)
3436                 return res;
3437
3438         return (cmos_handle)? 0 : 1;
3439 }
3440
3441 static void cmos_exit(void)
3442 {
3443         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3444 }
3445
3446 static int cmos_read(char *p)
3447 {
3448         int len = 0;
3449
3450         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3451            R30, R31, T20-22, X20-21 */
3452         if (!cmos_handle)
3453                 len += sprintf(p + len, "status:\t\tnot supported\n");
3454         else {
3455                 len += sprintf(p + len, "status:\t\tsupported\n");
3456                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3457         }
3458
3459         return len;
3460 }
3461
3462 static int cmos_write(char *buf)
3463 {
3464         char *cmd;
3465         int cmos_cmd, res;
3466
3467         while ((cmd = next_cmd(&buf))) {
3468                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3469                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3470                         /* cmos_cmd set */
3471                 } else
3472                         return -EINVAL;
3473
3474                 res = issue_thinkpad_cmos_command(cmos_cmd);
3475                 if (res)
3476                         return res;
3477         }
3478
3479         return 0;
3480 }
3481
3482 static struct ibm_struct cmos_driver_data = {
3483         .name = "cmos",
3484         .read = cmos_read,
3485         .write = cmos_write,
3486         .exit = cmos_exit,
3487 };
3488
3489 /*************************************************************************
3490  * LED subdriver
3491  */
3492
3493 enum led_access_mode {
3494         TPACPI_LED_NONE = 0,
3495         TPACPI_LED_570, /* 570 */
3496         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3497         TPACPI_LED_NEW, /* all others */
3498 };
3499
3500 enum {  /* For TPACPI_LED_OLD */
3501         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3502         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3503         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3504 };
3505
3506 static enum led_access_mode led_supported;
3507
3508 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3509            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3510                                 /* T20-22, X20-21 */
3511            "LED",               /* all others */
3512            );                   /* R30, R31 */
3513
3514 static int __init led_init(struct ibm_init_struct *iibm)
3515 {
3516         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3517
3518         TPACPI_ACPIHANDLE_INIT(led);
3519
3520         if (!led_handle)
3521                 /* led not supported on R30, R31 */
3522                 led_supported = TPACPI_LED_NONE;
3523         else if (strlencmp(led_path, "SLED") == 0)
3524                 /* 570 */
3525                 led_supported = TPACPI_LED_570;
3526         else if (strlencmp(led_path, "SYSL") == 0)
3527                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3528                 led_supported = TPACPI_LED_OLD;
3529         else
3530                 /* all others */
3531                 led_supported = TPACPI_LED_NEW;
3532
3533         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3534                 str_supported(led_supported), led_supported);
3535
3536         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3537 }
3538
3539 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3540
3541 static int led_read(char *p)
3542 {
3543         int len = 0;
3544
3545         if (!led_supported) {
3546                 len += sprintf(p + len, "status:\t\tnot supported\n");
3547                 return len;
3548         }
3549         len += sprintf(p + len, "status:\t\tsupported\n");
3550
3551         if (led_supported == TPACPI_LED_570) {
3552                 /* 570 */
3553                 int i, status;
3554                 for (i = 0; i < 8; i++) {
3555                         if (!acpi_evalf(ec_handle,
3556                                         &status, "GLED", "dd", 1 << i))
3557                                 return -EIO;
3558                         len += sprintf(p + len, "%d:\t\t%s\n",
3559                                        i, led_status(status));
3560                 }
3561         }
3562
3563         len += sprintf(p + len, "commands:\t"
3564                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3565
3566         return len;
3567 }
3568
3569 /* off, on, blink */
3570 static const int led_sled_arg1[] = { 0, 1, 3 };
3571 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
3572 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
3573 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3574
3575 static int led_write(char *buf)
3576 {
3577         char *cmd;
3578         int led, ind, ret;
3579
3580         if (!led_supported)
3581                 return -ENODEV;
3582
3583         while ((cmd = next_cmd(&buf))) {
3584                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3585                         return -EINVAL;
3586
3587                 if (strstr(cmd, "off")) {
3588                         ind = 0;
3589                 } else if (strstr(cmd, "on")) {
3590                         ind = 1;
3591                 } else if (strstr(cmd, "blink")) {
3592                         ind = 2;
3593                 } else
3594                         return -EINVAL;
3595
3596                 if (led_supported == TPACPI_LED_570) {
3597                         /* 570 */
3598                         led = 1 << led;
3599                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3600                                         led, led_sled_arg1[ind]))
3601                                 return -EIO;
3602                 } else if (led_supported == TPACPI_LED_OLD) {
3603                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3604                         led = 1 << led;
3605                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
3606                         if (ret >= 0)
3607                                 ret = ec_write(TPACPI_LED_EC_HLBL,
3608                                                 led * led_exp_hlbl[ind]);
3609                         if (ret >= 0)
3610                                 ret = ec_write(TPACPI_LED_EC_HLCL,
3611                                                 led * led_exp_hlcl[ind]);
3612                         if (ret < 0)
3613                                 return ret;
3614                 } else {
3615                         /* all others */
3616                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3617                                         led, led_led_arg1[ind]))
3618                                 return -EIO;
3619                 }
3620         }
3621
3622         return 0;
3623 }
3624
3625 static struct ibm_struct led_driver_data = {
3626         .name = "led",
3627         .read = led_read,
3628         .write = led_write,
3629 };
3630
3631 /*************************************************************************
3632  * Beep subdriver
3633  */
3634
3635 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
3636
3637 static int __init beep_init(struct ibm_init_struct *iibm)
3638 {
3639         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3640
3641         TPACPI_ACPIHANDLE_INIT(beep);
3642
3643         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3644                 str_supported(beep_handle != NULL));
3645
3646         return (beep_handle)? 0 : 1;
3647 }
3648
3649 static int beep_read(char *p)
3650 {
3651         int len = 0;
3652
3653         if (!beep_handle)
3654                 len += sprintf(p + len, "status:\t\tnot supported\n");
3655         else {
3656                 len += sprintf(p + len, "status:\t\tsupported\n");
3657                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3658         }
3659
3660         return len;
3661 }
3662
3663 static int beep_write(char *buf)
3664 {
3665         char *cmd;
3666         int beep_cmd;
3667
3668         if (!beep_handle)
3669                 return -ENODEV;
3670
3671         while ((cmd = next_cmd(&buf))) {
3672                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3673                     beep_cmd >= 0 && beep_cmd <= 17) {
3674                         /* beep_cmd set */
3675                 } else
3676                         return -EINVAL;
3677                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3678                         return -EIO;
3679         }
3680
3681         return 0;
3682 }
3683
3684 static struct ibm_struct beep_driver_data = {
3685         .name = "beep",
3686         .read = beep_read,
3687         .write = beep_write,
3688 };
3689
3690 /*************************************************************************
3691  * Thermal subdriver
3692  */
3693
3694 enum thermal_access_mode {
3695         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
3696         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
3697         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
3698         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
3699         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
3700 };
3701
3702 enum { /* TPACPI_THERMAL_TPEC_* */
3703         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
3704         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
3705         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
3706 };
3707
3708 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
3709 struct ibm_thermal_sensors_struct {
3710         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3711 };
3712
3713 static enum thermal_access_mode thermal_read_mode;
3714
3715 /* idx is zero-based */
3716 static int thermal_get_sensor(int idx, s32 *value)
3717 {
3718         int t;
3719         s8 tmp;
3720         char tmpi[5];
3721
3722         t = TP_EC_THERMAL_TMP0;
3723
3724         switch (thermal_read_mode) {
3725 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3726         case TPACPI_THERMAL_TPEC_16:
3727                 if (idx >= 8 && idx <= 15) {
3728                         t = TP_EC_THERMAL_TMP8;
3729                         idx -= 8;
3730                 }
3731                 /* fallthrough */
3732 #endif
3733         case TPACPI_THERMAL_TPEC_8:
3734                 if (idx <= 7) {
3735                         if (!acpi_ec_read(t + idx, &tmp))
3736                                 return -EIO;
3737                         *value = tmp * 1000;
3738                         return 0;
3739                 }
3740                 break;
3741
3742         case TPACPI_THERMAL_ACPI_UPDT:
3743                 if (idx <= 7) {
3744                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3745                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3746                                 return -EIO;
3747                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3748                                 return -EIO;
3749                         *value = (t - 2732) * 100;
3750                         return 0;
3751                 }
3752                 break;
3753
3754         case TPACPI_THERMAL_ACPI_TMP07:
3755                 if (idx <= 7) {
3756                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3757                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3758                                 return -EIO;
3759                         if (t > 127 || t < -127)
3760                                 t = TP_EC_THERMAL_TMP_NA;
3761                         *value = t * 1000;
3762                         return 0;
3763                 }
3764                 break;
3765
3766         case TPACPI_THERMAL_NONE:
3767         default:
3768                 return -ENOSYS;
3769         }
3770
3771         return -EINVAL;
3772 }
3773
3774 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3775 {
3776         int res, i;
3777         int n;
3778
3779         n = 8;
3780         i = 0;
3781
3782         if (!s)
3783                 return -EINVAL;
3784
3785         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3786                 n = 16;
3787
3788         for (i = 0 ; i < n; i++) {
3789                 res = thermal_get_sensor(i, &s->temp[i]);
3790                 if (res)
3791                         return res;
3792         }
3793
3794         return n;
3795 }
3796
3797 /* sysfs temp##_input -------------------------------------------------- */
3798
3799 static ssize_t thermal_temp_input_show(struct device *dev,
3800                            struct device_attribute *attr,
3801                            char *buf)
3802 {
3803         struct sensor_device_attribute *sensor_attr =
3804                                         to_sensor_dev_attr(attr);
3805         int idx = sensor_attr->index;
3806         s32 value;
3807         int res;
3808
3809         res = thermal_get_sensor(idx, &value);
3810         if (res)
3811                 return res;
3812         if (value == TP_EC_THERMAL_TMP_NA * 1000)
3813                 return -ENXIO;
3814
3815         return snprintf(buf, PAGE_SIZE, "%d\n", value);
3816 }
3817
3818 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
3819          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
3820                      thermal_temp_input_show, NULL, _idxB)
3821
3822 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
3823         THERMAL_SENSOR_ATTR_TEMP(1, 0),
3824         THERMAL_SENSOR_ATTR_TEMP(2, 1),
3825         THERMAL_SENSOR_ATTR_TEMP(3, 2),
3826         THERMAL_SENSOR_ATTR_TEMP(4, 3),
3827         THERMAL_SENSOR_ATTR_TEMP(5, 4),
3828         THERMAL_SENSOR_ATTR_TEMP(6, 5),
3829         THERMAL_SENSOR_ATTR_TEMP(7, 6),
3830         THERMAL_SENSOR_ATTR_TEMP(8, 7),
3831         THERMAL_SENSOR_ATTR_TEMP(9, 8),
3832         THERMAL_SENSOR_ATTR_TEMP(10, 9),
3833         THERMAL_SENSOR_ATTR_TEMP(11, 10),
3834         THERMAL_SENSOR_ATTR_TEMP(12, 11),
3835         THERMAL_SENSOR_ATTR_TEMP(13, 12),
3836         THERMAL_SENSOR_ATTR_TEMP(14, 13),
3837         THERMAL_SENSOR_ATTR_TEMP(15, 14),
3838         THERMAL_SENSOR_ATTR_TEMP(16, 15),
3839 };
3840
3841 #define THERMAL_ATTRS(X) \
3842         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
3843
3844 static struct attribute *thermal_temp_input_attr[] = {
3845         THERMAL_ATTRS(8),
3846         THERMAL_ATTRS(9),
3847         THERMAL_ATTRS(10),
3848         THERMAL_ATTRS(11),
3849         THERMAL_ATTRS(12),
3850         THERMAL_ATTRS(13),
3851         THERMAL_ATTRS(14),
3852         THERMAL_ATTRS(15),
3853         THERMAL_ATTRS(0),
3854         THERMAL_ATTRS(1),
3855         THERMAL_ATTRS(2),
3856         THERMAL_ATTRS(3),
3857         THERMAL_ATTRS(4),
3858         THERMAL_ATTRS(5),
3859         THERMAL_ATTRS(6),
3860         THERMAL_ATTRS(7),
3861         NULL
3862 };
3863
3864 static const struct attribute_group thermal_temp_input16_group = {
3865         .attrs = thermal_temp_input_attr
3866 };
3867
3868 static const struct attribute_group thermal_temp_input8_group = {
3869         .attrs = &thermal_temp_input_attr[8]
3870 };
3871
3872 #undef THERMAL_SENSOR_ATTR_TEMP
3873 #undef THERMAL_ATTRS
3874
3875 /* --------------------------------------------------------------------- */
3876
3877 static int __init thermal_init(struct ibm_init_struct *iibm)
3878 {
3879         u8 t, ta1, ta2;
3880         int i;
3881         int acpi_tmp7;
3882         int res;
3883
3884         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
3885
3886         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
3887
3888         if (thinkpad_id.ec_model) {
3889                 /*
3890                  * Direct EC access mode: sensors at registers
3891                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
3892                  * non-implemented, thermal sensors return 0x80 when
3893                  * not available
3894                  */
3895
3896                 ta1 = ta2 = 0;
3897                 for (i = 0; i < 8; i++) {
3898                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
3899                                 ta1 |= t;
3900                         } else {
3901                                 ta1 = 0;
3902                                 break;
3903                         }
3904                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
3905                                 ta2 |= t;
3906                         } else {
3907                                 ta1 = 0;
3908                                 break;
3909                         }
3910                 }
3911                 if (ta1 == 0) {
3912                         /* This is sheer paranoia, but we handle it anyway */
3913                         if (acpi_tmp7) {
3914                                 printk(TPACPI_ERR
3915                                        "ThinkPad ACPI EC access misbehaving, "
3916                                        "falling back to ACPI TMPx access "
3917                                        "mode\n");
3918                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3919                         } else {
3920                                 printk(TPACPI_ERR
3921                                        "ThinkPad ACPI EC access misbehaving, "
3922                                        "disabling thermal sensors access\n");
3923                                 thermal_read_mode = TPACPI_THERMAL_NONE;
3924                         }
3925                 } else {
3926                         thermal_read_mode =
3927                             (ta2 != 0) ?
3928                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
3929                 }
3930         } else if (acpi_tmp7) {
3931                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
3932                         /* 600e/x, 770e, 770x */
3933                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
3934                 } else {
3935                         /* Standard ACPI TMPx access, max 8 sensors */
3936                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3937                 }
3938         } else {
3939                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
3940                 thermal_read_mode = TPACPI_THERMAL_NONE;
3941         }
3942
3943         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
3944                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
3945                 thermal_read_mode);
3946
3947         switch (thermal_read_mode) {
3948         case TPACPI_THERMAL_TPEC_16:
3949                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3950                                 &thermal_temp_input16_group);
3951                 if (res)
3952                         return res;
3953                 break;
3954         case TPACPI_THERMAL_TPEC_8:
3955         case TPACPI_THERMAL_ACPI_TMP07:
3956         case TPACPI_THERMAL_ACPI_UPDT:
3957                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3958                                 &thermal_temp_input8_group);
3959                 if (res)
3960                         return res;
3961                 break;
3962         case TPACPI_THERMAL_NONE:
3963         default:
3964                 return 1;
3965         }
3966
3967         return 0;
3968 }
3969
3970 static void thermal_exit(void)
3971 {
3972         switch (thermal_read_mode) {
3973         case TPACPI_THERMAL_TPEC_16:
3974                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3975                                    &thermal_temp_input16_group);
3976                 break;
3977         case TPACPI_THERMAL_TPEC_8:
3978         case TPACPI_THERMAL_ACPI_TMP07:
3979         case TPACPI_THERMAL_ACPI_UPDT:
3980                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3981                                    &thermal_temp_input16_group);
3982                 break;
3983         case TPACPI_THERMAL_NONE:
3984         default:
3985                 break;
3986         }
3987 }
3988
3989 static int thermal_read(char *p)
3990 {
3991         int len = 0;
3992         int n, i;
3993         struct ibm_thermal_sensors_struct t;
3994
3995         n = thermal_get_sensors(&t);
3996         if (unlikely(n < 0))
3997                 return n;
3998
3999         len += sprintf(p + len, "temperatures:\t");
4000
4001         if (n > 0) {
4002                 for (i = 0; i < (n - 1); i++)
4003                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4004                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4005         } else
4006                 len += sprintf(p + len, "not supported\n");
4007
4008         return len;
4009 }
4010
4011 static struct ibm_struct thermal_driver_data = {
4012         .name = "thermal",
4013         .read = thermal_read,
4014         .exit = thermal_exit,
4015 };
4016
4017 /*************************************************************************
4018  * EC Dump subdriver
4019  */
4020
4021 static u8 ecdump_regs[256];
4022
4023 static int ecdump_read(char *p)
4024 {
4025         int len = 0;
4026         int i, j;
4027         u8 v;
4028
4029         len += sprintf(p + len, "EC      "
4030                        " +00 +01 +02 +03 +04 +05 +06 +07"
4031                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4032         for (i = 0; i < 256; i += 16) {
4033                 len += sprintf(p + len, "EC 0x%02x:", i);
4034                 for (j = 0; j < 16; j++) {
4035                         if (!acpi_ec_read(i + j, &v))
4036                                 break;
4037                         if (v != ecdump_regs[i + j])
4038                                 len += sprintf(p + len, " *%02x", v);
4039                         else
4040                                 len += sprintf(p + len, "  %02x", v);
4041                         ecdump_regs[i + j] = v;
4042                 }
4043                 len += sprintf(p + len, "\n");
4044                 if (j != 16)
4045                         break;
4046         }
4047
4048         /* These are way too dangerous to advertise openly... */
4049 #if 0
4050         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4051                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4052         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4053                        " (<offset> is 00-ff, <value> is 0-255)\n");
4054 #endif
4055         return len;
4056 }
4057
4058 static int ecdump_write(char *buf)
4059 {
4060         char *cmd;
4061         int i, v;
4062
4063         while ((cmd = next_cmd(&buf))) {
4064                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4065                         /* i and v set */
4066                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4067                         /* i and v set */
4068                 } else
4069                         return -EINVAL;
4070                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4071                         if (!acpi_ec_write(i, v))
4072                                 return -EIO;
4073                 } else
4074                         return -EINVAL;
4075         }
4076
4077         return 0;
4078 }
4079
4080 static struct ibm_struct ecdump_driver_data = {
4081         .name = "ecdump",
4082         .read = ecdump_read,
4083         .write = ecdump_write,
4084         .flags.experimental = 1,
4085 };
4086
4087 /*************************************************************************
4088  * Backlight/brightness subdriver
4089  */
4090
4091 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4092
4093 static struct backlight_device *ibm_backlight_device;
4094 static int brightness_offset = 0x31;
4095 static int brightness_mode;
4096 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4097
4098 static struct mutex brightness_mutex;
4099
4100 /*
4101  * ThinkPads can read brightness from two places: EC 0x31, or
4102  * CMOS NVRAM byte 0x5E, bits 0-3.
4103  */
4104 static int brightness_get(struct backlight_device *bd)
4105 {
4106         u8 lec = 0, lcmos = 0, level = 0;
4107
4108         if (brightness_mode & 1) {
4109                 if (!acpi_ec_read(brightness_offset, &lec))
4110                         return -EIO;
4111                 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4112                 level = lec;
4113         };
4114         if (brightness_mode & 2) {
4115                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4116                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4117                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4118                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4119                 level = lcmos;
4120         }
4121
4122         if (brightness_mode == 3 && lec != lcmos) {
4123                 printk(TPACPI_ERR
4124                         "CMOS NVRAM (%u) and EC (%u) do not agree "
4125                         "on display brightness level\n",
4126                         (unsigned int) lcmos,
4127                         (unsigned int) lec);
4128                 return -EIO;
4129         }
4130
4131         return level;
4132 }
4133
4134 /* May return EINTR which can always be mapped to ERESTARTSYS */
4135 static int brightness_set(int value)
4136 {
4137         int cmos_cmd, inc, i, res;
4138         int current_value;
4139
4140         if (value > ((tp_features.bright_16levels)? 15 : 7))
4141                 return -EINVAL;
4142
4143         res = mutex_lock_interruptible(&brightness_mutex);
4144         if (res < 0)
4145                 return res;
4146
4147         current_value = brightness_get(NULL);
4148         if (current_value < 0) {
4149                 res = current_value;
4150                 goto errout;
4151         }
4152
4153         cmos_cmd = value > current_value ?
4154                         TP_CMOS_BRIGHTNESS_UP :
4155                         TP_CMOS_BRIGHTNESS_DOWN;
4156         inc = (value > current_value)? 1 : -1;
4157
4158         res = 0;
4159         for (i = current_value; i != value; i += inc) {
4160                 if ((brightness_mode & 2) &&
4161                     issue_thinkpad_cmos_command(cmos_cmd)) {
4162                         res = -EIO;
4163                         goto errout;
4164                 }
4165                 if ((brightness_mode & 1) &&
4166                     !acpi_ec_write(brightness_offset, i + inc)) {
4167                         res = -EIO;
4168                         goto errout;;
4169                 }
4170         }
4171
4172 errout:
4173         mutex_unlock(&brightness_mutex);
4174         return res;
4175 }
4176
4177 /* sysfs backlight class ----------------------------------------------- */
4178
4179 static int brightness_update_status(struct backlight_device *bd)
4180 {
4181         /* it is the backlight class's job (caller) to handle
4182          * EINTR and other errors properly */
4183         return brightness_set(
4184                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4185                  bd->props.power == FB_BLANK_UNBLANK) ?
4186                                 bd->props.brightness : 0);
4187 }
4188
4189 static struct backlight_ops ibm_backlight_data = {
4190         .get_brightness = brightness_get,
4191         .update_status  = brightness_update_status,
4192 };
4193
4194 /* --------------------------------------------------------------------- */
4195
4196 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
4197 {
4198         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
4199         union acpi_object *obj;
4200         int rc;
4201
4202         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
4203                 obj = (union acpi_object *)buffer.pointer;
4204                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
4205                         printk(TPACPI_ERR "Unknown BCLL data, "
4206                                "please report this to %s\n", TPACPI_MAIL);
4207                         rc = 0;
4208                 } else {
4209                         rc = obj->package.count;
4210                 }
4211         } else {
4212                 return 0;
4213         }
4214
4215         kfree(buffer.pointer);
4216         return rc;
4217 }
4218
4219 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
4220                                         void *context, void **rv)
4221 {
4222         char name[ACPI_PATH_SEGMENT_LENGTH];
4223         struct acpi_buffer buffer = { sizeof(name), &name };
4224
4225         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4226             !strncmp("BCLL", name, sizeof(name) - 1)) {
4227                 if (tpacpi_query_bcll_levels(handle) == 16) {
4228                         *rv = handle;
4229                         return AE_CTRL_TERMINATE;
4230                 } else {
4231                         return AE_OK;
4232                 }
4233         } else {
4234                 return AE_OK;
4235         }
4236 }
4237
4238 static int __init brightness_check_levels(void)
4239 {
4240         int status;
4241         void *found_node = NULL;
4242
4243         if (!vid_handle) {
4244                 TPACPI_ACPIHANDLE_INIT(vid);
4245         }
4246         if (!vid_handle)
4247                 return 0;
4248
4249         /* Search for a BCLL package with 16 levels */
4250         status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
4251                                         brightness_find_bcll, NULL,
4252                                         &found_node);
4253
4254         return (ACPI_SUCCESS(status) && found_node != NULL);
4255 }
4256
4257 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
4258                                         void *context, void **rv)
4259 {
4260         char name[ACPI_PATH_SEGMENT_LENGTH];
4261         struct acpi_buffer buffer = { sizeof(name), &name };
4262
4263         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4264             !strncmp("_BCL", name, sizeof(name) - 1)) {
4265                 *rv = handle;
4266                 return AE_CTRL_TERMINATE;
4267         } else {
4268                 return AE_OK;
4269         }
4270 }
4271
4272 static int __init brightness_check_std_acpi_support(void)
4273 {
4274         int status;
4275         void *found_node = NULL;
4276
4277         if (!vid_handle) {
4278                 TPACPI_ACPIHANDLE_INIT(vid);
4279         }
4280         if (!vid_handle)
4281                 return 0;
4282
4283         /* Search for a _BCL method, but don't execute it */
4284         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
4285                                      brightness_find_bcl, NULL, &found_node);
4286
4287         return (ACPI_SUCCESS(status) && found_node != NULL);
4288 }
4289
4290 static int __init brightness_init(struct ibm_init_struct *iibm)
4291 {
4292         int b;
4293
4294         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4295
4296         mutex_init(&brightness_mutex);
4297
4298         if (!brightness_enable) {
4299                 dbg_printk(TPACPI_DBG_INIT,
4300                            "brightness support disabled by "
4301                            "module parameter\n");
4302                 return 1;
4303         } else if (brightness_enable > 1) {
4304                 if (brightness_check_std_acpi_support()) {
4305                         printk(TPACPI_NOTICE
4306                                "standard ACPI backlight interface "
4307                                "available, not loading native one...\n");
4308                         return 1;
4309                 }
4310         }
4311
4312         if (!brightness_mode) {
4313                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4314                         brightness_mode = 2;
4315                 else
4316                         brightness_mode = 3;
4317
4318                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4319                         brightness_mode);
4320         }
4321
4322         if (brightness_mode > 3)
4323                 return -EINVAL;
4324
4325         tp_features.bright_16levels =
4326                         thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
4327                         brightness_check_levels();
4328
4329         b = brightness_get(NULL);
4330         if (b < 0)
4331                 return 1;
4332
4333         if (tp_features.bright_16levels)
4334                 printk(TPACPI_INFO
4335                        "detected a 16-level brightness capable ThinkPad\n");
4336
4337         ibm_backlight_device = backlight_device_register(
4338                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4339                                         &ibm_backlight_data);
4340         if (IS_ERR(ibm_backlight_device)) {
4341                 printk(TPACPI_ERR "Could not register backlight device\n");
4342                 return PTR_ERR(ibm_backlight_device);
4343         }
4344         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4345
4346         ibm_backlight_device->props.max_brightness =
4347                                 (tp_features.bright_16levels)? 15 : 7;
4348         ibm_backlight_device->props.brightness = b;
4349         backlight_update_status(ibm_backlight_device);
4350
4351         return 0;
4352 }
4353
4354 static void brightness_exit(void)
4355 {
4356         if (ibm_backlight_device) {
4357                 vdbg_printk(TPACPI_DBG_EXIT,
4358                             "calling backlight_device_unregister()\n");
4359                 backlight_device_unregister(ibm_backlight_device);
4360                 ibm_backlight_device = NULL;
4361         }
4362 }
4363
4364 static int brightness_read(char *p)
4365 {
4366         int len = 0;
4367         int level;
4368
4369         level = brightness_get(NULL);
4370         if (level < 0) {
4371                 len += sprintf(p + len, "level:\t\tunreadable\n");
4372         } else {
4373                 len += sprintf(p + len, "level:\t\t%d\n", level);
4374                 len += sprintf(p + len, "commands:\tup, down\n");
4375                 len += sprintf(p + len, "commands:\tlevel <level>"
4376                                " (<level> is 0-%d)\n",
4377                                (tp_features.bright_16levels) ? 15 : 7);
4378         }
4379
4380         return len;
4381 }
4382
4383 static int brightness_write(char *buf)
4384 {
4385         int level;
4386         int rc;
4387         char *cmd;
4388         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4389
4390         level = brightness_get(NULL);
4391         if (level < 0)
4392                 return level;
4393
4394         while ((cmd = next_cmd(&buf))) {
4395                 if (strlencmp(cmd, "up") == 0) {
4396                         if (level < max_level)
4397                                 level++;
4398                 } else if (strlencmp(cmd, "down") == 0) {
4399                         if (level > 0)
4400                                 level--;
4401                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4402                            level >= 0 && level <= max_level) {
4403                         /* new level set */
4404                 } else
4405                         return -EINVAL;
4406         }
4407
4408         /*
4409          * Now we know what the final level should be, so we try to set it.
4410          * Doing it this way makes the syscall restartable in case of EINTR
4411          */
4412         rc = brightness_set(level);
4413         return (rc == -EINTR)? ERESTARTSYS : rc;
4414 }
4415
4416 static struct ibm_struct brightness_driver_data = {
4417         .name = "brightness",
4418         .read = brightness_read,
4419         .write = brightness_write,
4420         .exit = brightness_exit,
4421 };
4422
4423 /*************************************************************************
4424  * Volume subdriver
4425  */
4426
4427 static int volume_offset = 0x30;
4428
4429 static int volume_read(char *p)
4430 {
4431         int len = 0;
4432         u8 level;
4433
4434         if (!acpi_ec_read(volume_offset, &level)) {
4435                 len += sprintf(p + len, "level:\t\tunreadable\n");
4436         } else {
4437                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4438                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4439                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4440                 len += sprintf(p + len, "commands:\tlevel <level>"
4441                                " (<level> is 0-15)\n");
4442         }
4443
4444         return len;
4445 }
4446
4447 static int volume_write(char *buf)
4448 {
4449         int cmos_cmd, inc, i;
4450         u8 level, mute;
4451         int new_level, new_mute;
4452         char *cmd;
4453
4454         while ((cmd = next_cmd(&buf))) {
4455                 if (!acpi_ec_read(volume_offset, &level))
4456                         return -EIO;
4457                 new_mute = mute = level & 0x40;
4458                 new_level = level = level & 0xf;
4459
4460                 if (strlencmp(cmd, "up") == 0) {
4461                         if (mute)
4462                                 new_mute = 0;
4463                         else
4464                                 new_level = level == 15 ? 15 : level + 1;
4465                 } else if (strlencmp(cmd, "down") == 0) {
4466                         if (mute)
4467                                 new_mute = 0;
4468                         else
4469                                 new_level = level == 0 ? 0 : level - 1;
4470                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4471                            new_level >= 0 && new_level <= 15) {
4472                         /* new_level set */
4473                 } else if (strlencmp(cmd, "mute") == 0) {
4474                         new_mute = 0x40;
4475                 } else
4476                         return -EINVAL;
4477
4478                 if (new_level != level) {
4479                         /* mute doesn't change */
4480
4481                         cmos_cmd = (new_level > level) ?
4482                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4483                         inc = new_level > level ? 1 : -1;
4484
4485                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4486                                      !acpi_ec_write(volume_offset, level)))
4487                                 return -EIO;
4488
4489                         for (i = level; i != new_level; i += inc)
4490                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4491                                     !acpi_ec_write(volume_offset, i + inc))
4492                                         return -EIO;
4493
4494                         if (mute &&
4495                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4496                              !acpi_ec_write(volume_offset, new_level + mute))) {
4497                                 return -EIO;
4498                         }
4499                 }
4500
4501                 if (new_mute != mute) {
4502                         /* level doesn't change */
4503
4504                         cmos_cmd = (new_mute) ?
4505                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4506
4507                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4508                             !acpi_ec_write(volume_offset, level + new_mute))
4509                                 return -EIO;
4510                 }
4511         }
4512
4513         return 0;
4514 }
4515
4516 static struct ibm_struct volume_driver_data = {
4517         .name = "volume",
4518         .read = volume_read,
4519         .write = volume_write,
4520 };
4521
4522 /*************************************************************************
4523  * Fan subdriver
4524  */
4525
4526 /*
4527  * FAN ACCESS MODES
4528  *
4529  * TPACPI_FAN_RD_ACPI_GFAN:
4530  *      ACPI GFAN method: returns fan level
4531  *
4532  *      see TPACPI_FAN_WR_ACPI_SFAN
4533  *      EC 0x2f (HFSP) not available if GFAN exists
4534  *
4535  * TPACPI_FAN_WR_ACPI_SFAN:
4536  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4537  *
4538  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4539  *      it for writing.
4540  *
4541  * TPACPI_FAN_WR_TPEC:
4542  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4543  *      Supported on almost all ThinkPads
4544  *
4545  *      Fan speed changes of any sort (including those caused by the
4546  *      disengaged mode) are usually done slowly by the firmware as the
4547  *      maximum ammount of fan duty cycle change per second seems to be
4548  *      limited.
4549  *
4550  *      Reading is not available if GFAN exists.
4551  *      Writing is not available if SFAN exists.
4552  *
4553  *      Bits
4554  *       7      automatic mode engaged;
4555  *              (default operation mode of the ThinkPad)
4556  *              fan level is ignored in this mode.
4557  *       6      full speed mode (takes precedence over bit 7);
4558  *              not available on all thinkpads.  May disable
4559  *              the tachometer while the fan controller ramps up
4560  *              the speed (which can take up to a few *minutes*).
4561  *              Speeds up fan to 100% duty-cycle, which is far above
4562  *              the standard RPM levels.  It is not impossible that
4563  *              it could cause hardware damage.
4564  *      5-3     unused in some models.  Extra bits for fan level
4565  *              in others, but still useless as all values above
4566  *              7 map to the same speed as level 7 in these models.
4567  *      2-0     fan level (0..7 usually)
4568  *                      0x00 = stop
4569  *                      0x07 = max (set when temperatures critical)
4570  *              Some ThinkPads may have other levels, see
4571  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4572  *
4573  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4574  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4575  *      does so, its initial value is meaningless (0x07).
4576  *
4577  *      For firmware bugs, refer to:
4578  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4579  *
4580  *      ----
4581  *
4582  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4583  *      Main fan tachometer reading (in RPM)
4584  *
4585  *      This register is present on all ThinkPads with a new-style EC, and
4586  *      it is known not to be present on the A21m/e, and T22, as there is
4587  *      something else in offset 0x84 according to the ACPI DSDT.  Other
4588  *      ThinkPads from this same time period (and earlier) probably lack the
4589  *      tachometer as well.
4590  *
4591  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4592  *      was never fixed by IBM to report the EC firmware version string
4593  *      probably support the tachometer (like the early X models), so
4594  *      detecting it is quite hard.  We need more data to know for sure.
4595  *
4596  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4597  *      might result.
4598  *
4599  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
4600  *      mode.
4601  *
4602  *      For firmware bugs, refer to:
4603  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4604  *
4605  * TPACPI_FAN_WR_ACPI_FANS:
4606  *      ThinkPad X31, X40, X41.  Not available in the X60.
4607  *
4608  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
4609  *      high speed.  ACPI DSDT seems to map these three speeds to levels
4610  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4611  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4612  *
4613  *      The speeds are stored on handles
4614  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4615  *
4616  *      There are three default speed sets, acessible as handles:
4617  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4618  *
4619  *      ACPI DSDT switches which set is in use depending on various
4620  *      factors.
4621  *
4622  *      TPACPI_FAN_WR_TPEC is also available and should be used to
4623  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
4624  *      but the ACPI tables just mention level 7.
4625  */
4626
4627 enum {                                  /* Fan control constants */
4628         fan_status_offset = 0x2f,       /* EC register 0x2f */
4629         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
4630                                          * 0x84 must be read before 0x85 */
4631
4632         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
4633         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
4634
4635         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
4636 };
4637
4638 enum fan_status_access_mode {
4639         TPACPI_FAN_NONE = 0,            /* No fan status or control */
4640         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
4641         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4642 };
4643
4644 enum fan_control_access_mode {
4645         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
4646         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
4647         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
4648         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
4649 };
4650
4651 enum fan_control_commands {
4652         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
4653         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
4654         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
4655                                                  * and also watchdog cmd */
4656 };
4657
4658 static int fan_control_allowed;
4659
4660 static enum fan_status_access_mode fan_status_access_mode;
4661 static enum fan_control_access_mode fan_control_access_mode;
4662 static enum fan_control_commands fan_control_commands;
4663
4664 static u8 fan_control_initial_status;
4665 static u8 fan_control_desired_level;
4666 static int fan_watchdog_maxinterval;
4667
4668 static struct mutex fan_mutex;
4669
4670 static void fan_watchdog_fire(struct work_struct *ignored);
4671 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4672
4673 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
4674 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4675            "\\FSPD",            /* 600e/x, 770e, 770x */
4676            );                   /* all others */
4677 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4678            "JFNS",              /* 770x-JL */
4679            );                   /* all others */
4680
4681 /*
4682  * Call with fan_mutex held
4683  */
4684 static void fan_update_desired_level(u8 status)
4685 {
4686         if ((status &
4687              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4688                 if (status > 7)
4689                         fan_control_desired_level = 7;
4690                 else
4691                         fan_control_desired_level = status;
4692         }
4693 }
4694
4695 static int fan_get_status(u8 *status)
4696 {
4697         u8 s;
4698
4699         /* TODO:
4700          * Add TPACPI_FAN_RD_ACPI_FANS ? */
4701
4702         switch (fan_status_access_mode) {
4703         case TPACPI_FAN_RD_ACPI_GFAN:
4704                 /* 570, 600e/x, 770e, 770x */
4705
4706                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4707                         return -EIO;
4708
4709                 if (likely(status))
4710                         *status = s & 0x07;
4711
4712                 break;
4713
4714         case TPACPI_FAN_RD_TPEC:
4715                 /* all except 570, 600e/x, 770e, 770x */
4716                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4717                         return -EIO;
4718
4719                 if (likely(status))
4720                         *status = s;
4721
4722                 break;
4723
4724         default:
4725                 return -ENXIO;
4726         }
4727
4728         return 0;
4729 }
4730
4731 static int fan_get_status_safe(u8 *status)
4732 {
4733         int rc;
4734         u8 s;
4735
4736         if (mutex_lock_interruptible(&fan_mutex))
4737                 return -ERESTARTSYS;
4738         rc = fan_get_status(&s);
4739         if (!rc)
4740                 fan_update_desired_level(s);
4741         mutex_unlock(&fan_mutex);
4742
4743         if (status)
4744                 *status = s;
4745
4746         return rc;
4747 }
4748
4749 static int fan_get_speed(unsigned int *speed)
4750 {
4751         u8 hi, lo;
4752
4753         switch (fan_status_access_mode) {
4754         case TPACPI_FAN_RD_TPEC:
4755                 /* all except 570, 600e/x, 770e, 770x */
4756                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4757                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4758                         return -EIO;
4759
4760                 if (likely(speed))
4761                         *speed = (hi << 8) | lo;
4762
4763                 break;
4764
4765         default:
4766                 return -ENXIO;
4767         }
4768
4769         return 0;
4770 }
4771
4772 static int fan_set_level(int level)
4773 {
4774         if (!fan_control_allowed)
4775                 return -EPERM;
4776
4777         switch (fan_control_access_mode) {
4778         case TPACPI_FAN_WR_ACPI_SFAN:
4779                 if (level >= 0 && level <= 7) {
4780                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4781                                 return -EIO;
4782                 } else
4783                         return -EINVAL;
4784                 break;
4785
4786         case TPACPI_FAN_WR_ACPI_FANS:
4787         case TPACPI_FAN_WR_TPEC:
4788                 if ((level != TP_EC_FAN_AUTO) &&
4789                     (level != TP_EC_FAN_FULLSPEED) &&
4790                     ((level < 0) || (level > 7)))
4791                         return -EINVAL;
4792
4793                 /* safety net should the EC not support AUTO
4794                  * or FULLSPEED mode bits and just ignore them */
4795                 if (level & TP_EC_FAN_FULLSPEED)
4796                         level |= 7;     /* safety min speed 7 */
4797                 else if (level & TP_EC_FAN_AUTO)
4798                         level |= 4;     /* safety min speed 4 */
4799
4800                 if (!acpi_ec_write(fan_status_offset, level))
4801                         return -EIO;
4802                 else
4803                         tp_features.fan_ctrl_status_undef = 0;
4804                 break;
4805
4806         default:
4807                 return -ENXIO;
4808         }
4809         return 0;
4810 }
4811
4812 static int fan_set_level_safe(int level)
4813 {
4814         int rc;
4815
4816         if (!fan_control_allowed)
4817                 return -EPERM;
4818
4819         if (mutex_lock_interruptible(&fan_mutex))
4820                 return -ERESTARTSYS;
4821
4822         if (level == TPACPI_FAN_LAST_LEVEL)
4823                 level = fan_control_desired_level;
4824
4825         rc = fan_set_level(level);
4826         if (!rc)
4827                 fan_update_desired_level(level);
4828
4829         mutex_unlock(&fan_mutex);
4830         return rc;
4831 }
4832
4833 static int fan_set_enable(void)
4834 {
4835         u8 s;
4836         int rc;
4837
4838         if (!fan_control_allowed)
4839                 return -EPERM;
4840
4841         if (mutex_lock_interruptible(&fan_mutex))
4842                 return -ERESTARTSYS;
4843
4844         switch (fan_control_access_mode) {
4845         case TPACPI_FAN_WR_ACPI_FANS:
4846         case TPACPI_FAN_WR_TPEC:
4847                 rc = fan_get_status(&s);
4848                 if (rc < 0)
4849                         break;
4850
4851                 /* Don't go out of emergency fan mode */
4852                 if (s != 7) {
4853                         s &= 0x07;
4854                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4855                 }
4856
4857                 if (!acpi_ec_write(fan_status_offset, s))
4858                         rc = -EIO;
4859                 else {
4860                         tp_features.fan_ctrl_status_undef = 0;
4861                         rc = 0;
4862                 }
4863                 break;
4864
4865         case TPACPI_FAN_WR_ACPI_SFAN:
4866                 rc = fan_get_status(&s);
4867                 if (rc < 0)
4868                         break;
4869
4870                 s &= 0x07;
4871
4872                 /* Set fan to at least level 4 */
4873                 s |= 4;
4874
4875                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4876                         rc = -EIO;
4877                 else
4878                         rc = 0;
4879                 break;
4880
4881         default:
4882                 rc = -ENXIO;
4883         }
4884
4885         mutex_unlock(&fan_mutex);
4886         return rc;
4887 }
4888
4889 static int fan_set_disable(void)
4890 {
4891         int rc;
4892
4893         if (!fan_control_allowed)
4894                 return -EPERM;
4895
4896         if (mutex_lock_interruptible(&fan_mutex))
4897                 return -ERESTARTSYS;
4898
4899         rc = 0;
4900         switch (fan_control_access_mode) {
4901         case TPACPI_FAN_WR_ACPI_FANS:
4902         case TPACPI_FAN_WR_TPEC:
4903                 if (!acpi_ec_write(fan_status_offset, 0x00))
4904                         rc = -EIO;
4905                 else {
4906                         fan_control_desired_level = 0;
4907                         tp_features.fan_ctrl_status_undef = 0;
4908                 }
4909                 break;
4910
4911         case TPACPI_FAN_WR_ACPI_SFAN:
4912                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4913                         rc = -EIO;
4914                 else
4915                         fan_control_desired_level = 0;
4916                 break;
4917
4918         default:
4919                 rc = -ENXIO;
4920         }
4921
4922
4923         mutex_unlock(&fan_mutex);
4924         return rc;
4925 }
4926
4927 static int fan_set_speed(int speed)
4928 {
4929         int rc;
4930
4931         if (!fan_control_allowed)
4932                 return -EPERM;
4933
4934         if (mutex_lock_interruptible(&fan_mutex))
4935                 return -ERESTARTSYS;
4936
4937         rc = 0;
4938         switch (fan_control_access_mode) {
4939         case TPACPI_FAN_WR_ACPI_FANS:
4940                 if (speed >= 0 && speed <= 65535) {
4941                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4942                                         speed, speed, speed))
4943                                 rc = -EIO;
4944                 } else
4945                         rc = -EINVAL;
4946                 break;
4947
4948         default:
4949                 rc = -ENXIO;
4950         }
4951
4952         mutex_unlock(&fan_mutex);
4953         return rc;
4954 }
4955
4956 static void fan_watchdog_reset(void)
4957 {
4958         static int fan_watchdog_active;
4959
4960         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
4961                 return;
4962
4963         if (fan_watchdog_active)
4964                 cancel_delayed_work(&fan_watchdog_task);
4965
4966         if (fan_watchdog_maxinterval > 0 &&
4967             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
4968                 fan_watchdog_active = 1;
4969                 if (!schedule_delayed_work(&fan_watchdog_task,
4970                                 msecs_to_jiffies(fan_watchdog_maxinterval
4971                                                  * 1000))) {
4972                         printk(TPACPI_ERR
4973                                "failed to schedule the fan watchdog, "
4974                                "watchdog will not trigger\n");
4975                 }
4976         } else
4977                 fan_watchdog_active = 0;
4978 }
4979
4980 static void fan_watchdog_fire(struct work_struct *ignored)
4981 {
4982         int rc;
4983
4984         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
4985                 return;
4986
4987         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
4988         rc = fan_set_enable();
4989         if (rc < 0) {
4990                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
4991                         "will try again later...\n", -rc);
4992                 /* reschedule for later */
4993                 fan_watchdog_reset();
4994         }
4995 }
4996
4997 /*
4998  * SYSFS fan layout: hwmon compatible (device)
4999  *
5000  * pwm*_enable:
5001  *      0: "disengaged" mode
5002  *      1: manual mode
5003  *      2: native EC "auto" mode (recommended, hardware default)
5004  *
5005  * pwm*: set speed in manual mode, ignored otherwise.
5006  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5007  *      interpolation.
5008  *
5009  * fan*_input: tachometer reading, RPM
5010  *
5011  *
5012  * SYSFS fan layout: extensions
5013  *
5014  * fan_watchdog (driver):
5015  *      fan watchdog interval in seconds, 0 disables (default), max 120
5016  */
5017
5018 /* sysfs fan pwm1_enable ----------------------------------------------- */
5019 static ssize_t fan_pwm1_enable_show(struct device *dev,
5020                                     struct device_attribute *attr,
5021                                     char *buf)
5022 {
5023         int res, mode;
5024         u8 status;
5025
5026         res = fan_get_status_safe(&status);
5027         if (res)
5028                 return res;
5029
5030         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5031                 if (status != fan_control_initial_status) {
5032                         tp_features.fan_ctrl_status_undef = 0;
5033                 } else {
5034                         /* Return most likely status. In fact, it
5035                          * might be the only possible status */
5036                         status = TP_EC_FAN_AUTO;
5037                 }
5038         }
5039
5040         if (status & TP_EC_FAN_FULLSPEED) {
5041                 mode = 0;
5042         } else if (status & TP_EC_FAN_AUTO) {
5043                 mode = 2;
5044         } else
5045                 mode = 1;
5046
5047         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5048 }
5049
5050 static ssize_t fan_pwm1_enable_store(struct device *dev,
5051                                      struct device_attribute *attr,
5052                                      const char *buf, size_t count)
5053 {
5054         unsigned long t;
5055         int res, level;
5056
5057         if (parse_strtoul(buf, 2, &t))
5058                 return -EINVAL;
5059
5060         switch (t) {
5061         case 0:
5062                 level = TP_EC_FAN_FULLSPEED;
5063                 break;
5064         case 1:
5065                 level = TPACPI_FAN_LAST_LEVEL;
5066                 break;
5067         case 2:
5068                 level = TP_EC_FAN_AUTO;
5069                 break;
5070         case 3:
5071                 /* reserved for software-controlled auto mode */
5072                 return -ENOSYS;
5073         default:
5074                 return -EINVAL;
5075         }
5076
5077         res = fan_set_level_safe(level);
5078         if (res == -ENXIO)
5079                 return -EINVAL;
5080         else if (res < 0)
5081                 return res;
5082
5083         fan_watchdog_reset();
5084
5085         return count;
5086 }
5087
5088 static struct device_attribute dev_attr_fan_pwm1_enable =
5089         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5090                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5091
5092 /* sysfs fan pwm1 ------------------------------------------------------ */
5093 static ssize_t fan_pwm1_show(struct device *dev,
5094                              struct device_attribute *attr,
5095                              char *buf)
5096 {
5097         int res;
5098         u8 status;
5099
5100         res = fan_get_status_safe(&status);
5101         if (res)
5102                 return res;
5103
5104         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5105                 if (status != fan_control_initial_status) {
5106                         tp_features.fan_ctrl_status_undef = 0;
5107                 } else {
5108                         status = TP_EC_FAN_AUTO;
5109                 }
5110         }
5111
5112         if ((status &
5113              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5114                 status = fan_control_desired_level;
5115
5116         if (status > 7)
5117                 status = 7;
5118
5119         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5120 }
5121
5122 static ssize_t fan_pwm1_store(struct device *dev,
5123                               struct device_attribute *attr,
5124                               const char *buf, size_t count)
5125 {
5126         unsigned long s;
5127         int rc;
5128         u8 status, newlevel;
5129
5130         if (parse_strtoul(buf, 255, &s))
5131                 return -EINVAL;
5132
5133         /* scale down from 0-255 to 0-7 */
5134         newlevel = (s >> 5) & 0x07;
5135
5136         if (mutex_lock_interruptible(&fan_mutex))
5137                 return -ERESTARTSYS;
5138
5139         rc = fan_get_status(&status);
5140         if (!rc && (status &
5141                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5142                 rc = fan_set_level(newlevel);
5143                 if (rc == -ENXIO)
5144                         rc = -EINVAL;
5145                 else if (!rc) {
5146                         fan_update_desired_level(newlevel);
5147                         fan_watchdog_reset();
5148                 }
5149         }
5150
5151         mutex_unlock(&fan_mutex);
5152         return (rc)? rc : count;
5153 }
5154
5155 static struct device_attribute dev_attr_fan_pwm1 =
5156         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5157                 fan_pwm1_show, fan_pwm1_store);
5158
5159 /* sysfs fan fan1_input ------------------------------------------------ */
5160 static ssize_t fan_fan1_input_show(struct device *dev,
5161                            struct device_attribute *attr,
5162                            char *buf)
5163 {
5164         int res;
5165         unsigned int speed;
5166
5167         res = fan_get_speed(&speed);
5168         if (res < 0)
5169                 return res;
5170
5171         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5172 }
5173
5174 static struct device_attribute dev_attr_fan_fan1_input =
5175         __ATTR(fan1_input, S_IRUGO,
5176                 fan_fan1_input_show, NULL);
5177
5178 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5179 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5180                                      char *buf)
5181 {
5182         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5183 }
5184
5185 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5186                                       const char *buf, size_t count)
5187 {
5188         unsigned long t;
5189
5190         if (parse_strtoul(buf, 120, &t))
5191                 return -EINVAL;
5192
5193         if (!fan_control_allowed)
5194                 return -EPERM;
5195
5196         fan_watchdog_maxinterval = t;
5197         fan_watchdog_reset();
5198
5199         return count;
5200 }
5201
5202 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5203                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5204
5205 /* --------------------------------------------------------------------- */
5206 static struct attribute *fan_attributes[] = {
5207         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5208         &dev_attr_fan_fan1_input.attr,
5209         NULL
5210 };
5211
5212 static const struct attribute_group fan_attr_group = {
5213         .attrs = fan_attributes,
5214 };
5215
5216 static int __init fan_init(struct ibm_init_struct *iibm)
5217 {
5218         int rc;
5219
5220         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5221
5222         mutex_init(&fan_mutex);
5223         fan_status_access_mode = TPACPI_FAN_NONE;
5224         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5225         fan_control_commands = 0;
5226         fan_watchdog_maxinterval = 0;
5227         tp_features.fan_ctrl_status_undef = 0;
5228         fan_control_desired_level = 7;
5229
5230         TPACPI_ACPIHANDLE_INIT(fans);
5231         TPACPI_ACPIHANDLE_INIT(gfan);
5232         TPACPI_ACPIHANDLE_INIT(sfan);
5233
5234         if (gfan_handle) {
5235                 /* 570, 600e/x, 770e, 770x */
5236                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5237         } else {
5238                 /* all other ThinkPads: note that even old-style
5239                  * ThinkPad ECs supports the fan control register */
5240                 if (likely(acpi_ec_read(fan_status_offset,
5241                                         &fan_control_initial_status))) {
5242                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5243
5244                         /* In some ThinkPads, neither the EC nor the ACPI
5245                          * DSDT initialize the fan status, and it ends up
5246                          * being set to 0x07 when it *could* be either
5247                          * 0x07 or 0x80.
5248                          *
5249                          * Enable for TP-1Y (T43), TP-78 (R51e),
5250                          * TP-76 (R52), TP-70 (T43, R52), which are known
5251                          * to be buggy. */
5252                         if (fan_control_initial_status == 0x07) {
5253                                 switch (thinkpad_id.ec_model) {
5254                                 case 0x5931: /* TP-1Y */
5255                                 case 0x3837: /* TP-78 */
5256                                 case 0x3637: /* TP-76 */
5257                                 case 0x3037: /* TP-70 */
5258                                         printk(TPACPI_NOTICE
5259                                                "fan_init: initial fan status "
5260                                                "is unknown, assuming it is "
5261                                                "in auto mode\n");
5262                                         tp_features.fan_ctrl_status_undef = 1;
5263                                         ;;
5264                                 }
5265                         }
5266                 } else {
5267                         printk(TPACPI_ERR
5268                                "ThinkPad ACPI EC access misbehaving, "
5269                                "fan status and control unavailable\n");
5270                         return 1;
5271                 }
5272         }
5273
5274         if (sfan_handle) {
5275                 /* 570, 770x-JL */
5276                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5277                 fan_control_commands |=
5278                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5279         } else {
5280                 if (!gfan_handle) {
5281                         /* gfan without sfan means no fan control */
5282                         /* all other models implement TP EC 0x2f control */
5283
5284                         if (fans_handle) {
5285                                 /* X31, X40, X41 */
5286                                 fan_control_access_mode =
5287                                     TPACPI_FAN_WR_ACPI_FANS;
5288                                 fan_control_commands |=
5289                                     TPACPI_FAN_CMD_SPEED |
5290                                     TPACPI_FAN_CMD_LEVEL |
5291                                     TPACPI_FAN_CMD_ENABLE;
5292                         } else {
5293                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5294                                 fan_control_commands |=
5295                                     TPACPI_FAN_CMD_LEVEL |
5296                                     TPACPI_FAN_CMD_ENABLE;
5297                         }
5298                 }
5299         }
5300
5301         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5302                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5303                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5304                 fan_status_access_mode, fan_control_access_mode);
5305
5306         /* fan control master switch */
5307         if (!fan_control_allowed) {
5308                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5309                 fan_control_commands = 0;
5310                 dbg_printk(TPACPI_DBG_INIT,
5311                            "fan control features disabled by parameter\n");
5312         }
5313
5314         /* update fan_control_desired_level */
5315         if (fan_status_access_mode != TPACPI_FAN_NONE)
5316                 fan_get_status_safe(NULL);
5317
5318         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5319             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5320                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5321                                          &fan_attr_group);
5322                 if (!(rc < 0))
5323                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5324                                         &driver_attr_fan_watchdog);
5325                 if (rc < 0)
5326                         return rc;
5327                 return 0;
5328         } else
5329                 return 1;
5330 }
5331
5332 static void fan_exit(void)
5333 {
5334         vdbg_printk(TPACPI_DBG_EXIT,
5335                     "cancelling any pending fan watchdog tasks\n");
5336
5337         /* FIXME: can we really do this unconditionally? */
5338         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5339         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5340                            &driver_attr_fan_watchdog);
5341
5342         cancel_delayed_work(&fan_watchdog_task);
5343         flush_scheduled_work();
5344 }
5345
5346 static int fan_read(char *p)
5347 {
5348         int len = 0;
5349         int rc;
5350         u8 status;
5351         unsigned int speed = 0;
5352
5353         switch (fan_status_access_mode) {
5354         case TPACPI_FAN_RD_ACPI_GFAN:
5355                 /* 570, 600e/x, 770e, 770x */
5356                 rc = fan_get_status_safe(&status);
5357                 if (rc < 0)
5358                         return rc;
5359
5360                 len += sprintf(p + len, "status:\t\t%s\n"
5361                                "level:\t\t%d\n",
5362                                (status != 0) ? "enabled" : "disabled", status);
5363                 break;
5364
5365         case TPACPI_FAN_RD_TPEC:
5366                 /* all except 570, 600e/x, 770e, 770x */
5367                 rc = fan_get_status_safe(&status);
5368                 if (rc < 0)
5369                         return rc;
5370
5371                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5372                         if (status != fan_control_initial_status)
5373                                 tp_features.fan_ctrl_status_undef = 0;
5374                         else
5375                                 /* Return most likely status. In fact, it
5376                                  * might be the only possible status */
5377                                 status = TP_EC_FAN_AUTO;
5378                 }
5379
5380                 len += sprintf(p + len, "status:\t\t%s\n",
5381                                (status != 0) ? "enabled" : "disabled");
5382
5383                 rc = fan_get_speed(&speed);
5384                 if (rc < 0)
5385                         return rc;
5386
5387                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5388
5389                 if (status & TP_EC_FAN_FULLSPEED)
5390                         /* Disengaged mode takes precedence */
5391                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5392                 else if (status & TP_EC_FAN_AUTO)
5393                         len += sprintf(p + len, "level:\t\tauto\n");
5394                 else
5395                         len += sprintf(p + len, "level:\t\t%d\n", status);
5396                 break;
5397
5398         case TPACPI_FAN_NONE:
5399         default:
5400                 len += sprintf(p + len, "status:\t\tnot supported\n");
5401         }
5402
5403         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5404                 len += sprintf(p + len, "commands:\tlevel <level>");
5405
5406                 switch (fan_control_access_mode) {
5407                 case TPACPI_FAN_WR_ACPI_SFAN:
5408                         len += sprintf(p + len, " (<level> is 0-7)\n");
5409                         break;
5410
5411                 default:
5412                         len += sprintf(p + len, " (<level> is 0-7, "
5413                                        "auto, disengaged, full-speed)\n");
5414                         break;
5415                 }
5416         }
5417
5418         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5419                 len += sprintf(p + len, "commands:\tenable, disable\n"
5420                                "commands:\twatchdog <timeout> (<timeout> "
5421                                "is 0 (off), 1-120 (seconds))\n");
5422
5423         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5424                 len += sprintf(p + len, "commands:\tspeed <speed>"
5425                                " (<speed> is 0-65535)\n");
5426
5427         return len;
5428 }
5429
5430 static int fan_write_cmd_level(const char *cmd, int *rc)
5431 {
5432         int level;
5433
5434         if (strlencmp(cmd, "level auto") == 0)
5435                 level = TP_EC_FAN_AUTO;
5436         else if ((strlencmp(cmd, "level disengaged") == 0) |
5437                         (strlencmp(cmd, "level full-speed") == 0))
5438                 level = TP_EC_FAN_FULLSPEED;
5439         else if (sscanf(cmd, "level %d", &level) != 1)
5440                 return 0;
5441
5442         *rc = fan_set_level_safe(level);
5443         if (*rc == -ENXIO)
5444                 printk(TPACPI_ERR "level command accepted for unsupported "
5445                        "access mode %d", fan_control_access_mode);
5446
5447         return 1;
5448 }
5449
5450 static int fan_write_cmd_enable(const char *cmd, int *rc)
5451 {
5452         if (strlencmp(cmd, "enable") != 0)
5453                 return 0;
5454
5455         *rc = fan_set_enable();
5456         if (*rc == -ENXIO)
5457                 printk(TPACPI_ERR "enable command accepted for unsupported "
5458                        "access mode %d", fan_control_access_mode);
5459
5460         return 1;
5461 }
5462
5463 static int fan_write_cmd_disable(const char *cmd, int *rc)
5464 {
5465         if (strlencmp(cmd, "disable") != 0)
5466                 return 0;
5467
5468         *rc = fan_set_disable();
5469         if (*rc == -ENXIO)
5470                 printk(TPACPI_ERR "disable command accepted for unsupported "
5471                        "access mode %d", fan_control_access_mode);
5472
5473         return 1;
5474 }
5475
5476 static int fan_write_cmd_speed(const char *cmd, int *rc)
5477 {
5478         int speed;
5479
5480         /* TODO:
5481          * Support speed <low> <medium> <high> ? */
5482
5483         if (sscanf(cmd, "speed %d", &speed) != 1)
5484                 return 0;
5485
5486         *rc = fan_set_speed(speed);
5487         if (*rc == -ENXIO)
5488                 printk(TPACPI_ERR "speed command accepted for unsupported "
5489                        "access mode %d", fan_control_access_mode);
5490
5491         return 1;
5492 }
5493
5494 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5495 {
5496         int interval;
5497
5498         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5499                 return 0;
5500
5501         if (interval < 0 || interval > 120)
5502                 *rc = -EINVAL;
5503         else
5504                 fan_watchdog_maxinterval = interval;
5505
5506         return 1;
5507 }
5508
5509 static int fan_write(char *buf)
5510 {
5511         char *cmd;
5512         int rc = 0;
5513
5514         while (!rc && (cmd = next_cmd(&buf))) {
5515                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5516                       fan_write_cmd_level(cmd, &rc)) &&
5517                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5518                       (fan_write_cmd_enable(cmd, &rc) ||
5519                        fan_write_cmd_disable(cmd, &rc) ||
5520                        fan_write_cmd_watchdog(cmd, &rc))) &&
5521                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5522                       fan_write_cmd_speed(cmd, &rc))
5523                     )
5524                         rc = -EINVAL;
5525                 else if (!rc)
5526                         fan_watchdog_reset();
5527         }
5528
5529         return rc;
5530 }
5531
5532 static struct ibm_struct fan_driver_data = {
5533         .name = "fan",
5534         .read = fan_read,
5535         .write = fan_write,
5536         .exit = fan_exit,
5537 };
5538
5539 /****************************************************************************
5540  ****************************************************************************
5541  *
5542  * Infrastructure
5543  *
5544  ****************************************************************************
5545  ****************************************************************************/
5546
5547 /* sysfs name ---------------------------------------------------------- */
5548 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5549                            struct device_attribute *attr,
5550                            char *buf)
5551 {
5552         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5553 }
5554
5555 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5556         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5557
5558 /* --------------------------------------------------------------------- */
5559
5560 /* /proc support */
5561 static struct proc_dir_entry *proc_dir;
5562
5563 /*
5564  * Module and infrastructure proble, init and exit handling
5565  */
5566
5567 static int force_load;
5568
5569 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5570 static const char * __init str_supported(int is_supported)
5571 {
5572         static char text_unsupported[] __initdata = "not supported";
5573
5574         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5575 }
5576 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5577
5578 static void ibm_exit(struct ibm_struct *ibm)
5579 {
5580         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5581
5582         list_del_init(&ibm->all_drivers);
5583
5584         if (ibm->flags.acpi_notify_installed) {
5585                 dbg_printk(TPACPI_DBG_EXIT,
5586                         "%s: acpi_remove_notify_handler\n", ibm->name);
5587                 BUG_ON(!ibm->acpi);
5588                 acpi_remove_notify_handler(*ibm->acpi->handle,
5589                                            ibm->acpi->type,
5590                                            dispatch_acpi_notify);
5591                 ibm->flags.acpi_notify_installed = 0;
5592                 ibm->flags.acpi_notify_installed = 0;
5593         }
5594
5595         if (ibm->flags.proc_created) {
5596                 dbg_printk(TPACPI_DBG_EXIT,
5597                         "%s: remove_proc_entry\n", ibm->name);
5598                 remove_proc_entry(ibm->name, proc_dir);
5599                 ibm->flags.proc_created = 0;
5600         }
5601
5602         if (ibm->flags.acpi_driver_registered) {
5603                 dbg_printk(TPACPI_DBG_EXIT,
5604                         "%s: acpi_bus_unregister_driver\n", ibm->name);
5605                 BUG_ON(!ibm->acpi);
5606                 acpi_bus_unregister_driver(ibm->acpi->driver);
5607                 kfree(ibm->acpi->driver);
5608                 ibm->acpi->driver = NULL;
5609                 ibm->flags.acpi_driver_registered = 0;
5610         }
5611
5612         if (ibm->flags.init_called && ibm->exit) {
5613                 ibm->exit();
5614                 ibm->flags.init_called = 0;
5615         }
5616
5617         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5618 }
5619
5620 static int __init ibm_init(struct ibm_init_struct *iibm)
5621 {
5622         int ret;
5623         struct ibm_struct *ibm = iibm->data;
5624         struct proc_dir_entry *entry;
5625
5626         BUG_ON(ibm == NULL);
5627
5628         INIT_LIST_HEAD(&ibm->all_drivers);
5629
5630         if (ibm->flags.experimental && !experimental)
5631                 return 0;
5632
5633         dbg_printk(TPACPI_DBG_INIT,
5634                 "probing for %s\n", ibm->name);
5635
5636         if (iibm->init) {
5637                 ret = iibm->init(iibm);
5638                 if (ret > 0)
5639                         return 0;       /* probe failed */
5640                 if (ret)
5641                         return ret;
5642
5643                 ibm->flags.init_called = 1;
5644         }
5645
5646         if (ibm->acpi) {
5647                 if (ibm->acpi->hid) {
5648                         ret = register_tpacpi_subdriver(ibm);
5649                         if (ret)
5650                                 goto err_out;
5651                 }
5652
5653                 if (ibm->acpi->notify) {
5654                         ret = setup_acpi_notify(ibm);
5655                         if (ret == -ENODEV) {
5656                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5657                                         ibm->name);
5658                                 ret = 0;
5659                                 goto err_out;
5660                         }
5661                         if (ret < 0)
5662                                 goto err_out;
5663                 }
5664         }
5665
5666         dbg_printk(TPACPI_DBG_INIT,
5667                 "%s installed\n", ibm->name);
5668
5669         if (ibm->read) {
5670                 entry = create_proc_entry(ibm->name,
5671                                           S_IFREG | S_IRUGO | S_IWUSR,
5672                                           proc_dir);
5673                 if (!entry) {
5674                         printk(TPACPI_ERR "unable to create proc entry %s\n",
5675                                ibm->name);
5676                         ret = -ENODEV;
5677                         goto err_out;
5678                 }
5679                 entry->owner = THIS_MODULE;
5680                 entry->data = ibm;
5681                 entry->read_proc = &dispatch_procfs_read;
5682                 if (ibm->write)
5683                         entry->write_proc = &dispatch_procfs_write;
5684                 ibm->flags.proc_created = 1;
5685         }
5686
5687         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5688
5689         return 0;
5690
5691 err_out:
5692         dbg_printk(TPACPI_DBG_INIT,
5693                 "%s: at error exit path with result %d\n",
5694                 ibm->name, ret);
5695
5696         ibm_exit(ibm);
5697         return (ret < 0)? ret : 0;
5698 }
5699
5700 /* Probing */
5701
5702 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5703 {
5704         const struct dmi_device *dev = NULL;
5705         char ec_fw_string[18];
5706
5707         if (!tp)
5708                 return;
5709
5710         memset(tp, 0, sizeof(*tp));
5711
5712         if (dmi_name_in_vendors("IBM"))
5713                 tp->vendor = PCI_VENDOR_ID_IBM;
5714         else if (dmi_name_in_vendors("LENOVO"))
5715                 tp->vendor = PCI_VENDOR_ID_LENOVO;
5716         else
5717                 return;
5718
5719         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5720                                         GFP_KERNEL);
5721         if (!tp->bios_version_str)
5722                 return;
5723         tp->bios_model = tp->bios_version_str[0]
5724                          | (tp->bios_version_str[1] << 8);
5725
5726         /*
5727          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5728          * X32 or newer, all Z series;  Some models must have an
5729          * up-to-date BIOS or they will not be detected.
5730          *
5731          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5732          */
5733         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5734                 if (sscanf(dev->name,
5735                            "IBM ThinkPad Embedded Controller -[%17c",
5736                            ec_fw_string) == 1) {
5737                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5738                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5739
5740                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5741                         tp->ec_model = ec_fw_string[0]
5742                                         | (ec_fw_string[1] << 8);
5743                         break;
5744                 }
5745         }
5746
5747         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5748                                         GFP_KERNEL);
5749         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5750                 kfree(tp->model_str);
5751                 tp->model_str = NULL;
5752         }
5753 }
5754
5755 static int __init probe_for_thinkpad(void)
5756 {
5757         int is_thinkpad;
5758
5759         if (acpi_disabled)
5760                 return -ENODEV;
5761
5762         /*
5763          * Non-ancient models have better DMI tagging, but very old models
5764          * don't.
5765          */
5766         is_thinkpad = (thinkpad_id.model_str != NULL);
5767
5768         /* ec is required because many other handles are relative to it */
5769         TPACPI_ACPIHANDLE_INIT(ec);
5770         if (!ec_handle) {
5771                 if (is_thinkpad)
5772                         printk(TPACPI_ERR
5773                                 "Not yet supported ThinkPad detected!\n");
5774                 return -ENODEV;
5775         }
5776
5777         /*
5778          * Risks a regression on very old machines, but reduces potential
5779          * false positives a damn great deal
5780          */
5781         if (!is_thinkpad)
5782                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5783
5784         if (!is_thinkpad && !force_load)
5785                 return -ENODEV;
5786
5787         return 0;
5788 }
5789
5790
5791 /* Module init, exit, parameters */
5792
5793 static struct ibm_init_struct ibms_init[] __initdata = {
5794         {
5795                 .init = thinkpad_acpi_driver_init,
5796                 .data = &thinkpad_acpi_driver_data,
5797         },
5798         {
5799                 .init = hotkey_init,
5800                 .data = &hotkey_driver_data,
5801         },
5802         {
5803                 .init = bluetooth_init,
5804                 .data = &bluetooth_driver_data,
5805         },
5806         {
5807                 .init = wan_init,
5808                 .data = &wan_driver_data,
5809         },
5810         {
5811                 .init = video_init,
5812                 .data = &video_driver_data,
5813         },
5814         {
5815                 .init = light_init,
5816                 .data = &light_driver_data,
5817         },
5818 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5819         {
5820                 .init = dock_init,
5821                 .data = &dock_driver_data[0],
5822         },
5823         {
5824                 .init = dock_init2,
5825                 .data = &dock_driver_data[1],
5826         },
5827 #endif
5828 #ifdef CONFIG_THINKPAD_ACPI_BAY
5829         {
5830                 .init = bay_init,
5831                 .data = &bay_driver_data,
5832         },
5833 #endif
5834         {
5835                 .init = cmos_init,
5836                 .data = &cmos_driver_data,
5837         },
5838         {
5839                 .init = led_init,
5840                 .data = &led_driver_data,
5841         },
5842         {
5843                 .init = beep_init,
5844                 .data = &beep_driver_data,
5845         },
5846         {
5847                 .init = thermal_init,
5848                 .data = &thermal_driver_data,
5849         },
5850         {
5851                 .data = &ecdump_driver_data,
5852         },
5853         {
5854                 .init = brightness_init,
5855                 .data = &brightness_driver_data,
5856         },
5857         {
5858                 .data = &volume_driver_data,
5859         },
5860         {
5861                 .init = fan_init,
5862                 .data = &fan_driver_data,
5863         },
5864 };
5865
5866 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
5867 {
5868         unsigned int i;
5869         struct ibm_struct *ibm;
5870
5871         if (!kp || !kp->name || !val)
5872                 return -EINVAL;
5873
5874         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5875                 ibm = ibms_init[i].data;
5876                 WARN_ON(ibm == NULL);
5877
5878                 if (!ibm || !ibm->name)
5879                         continue;
5880
5881                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
5882                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
5883                                 return -ENOSPC;
5884                         strcpy(ibms_init[i].param, val);
5885                         strcat(ibms_init[i].param, ",");
5886                         return 0;
5887                 }
5888         }
5889
5890         return -EINVAL;
5891 }
5892
5893 module_param(experimental, int, 0);
5894 MODULE_PARM_DESC(experimental,
5895                  "Enables experimental features when non-zero");
5896
5897 module_param_named(debug, dbg_level, uint, 0);
5898 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
5899
5900 module_param(force_load, bool, 0);
5901 MODULE_PARM_DESC(force_load,
5902                  "Attempts to load the driver even on a "
5903                  "mis-identified ThinkPad when true");
5904
5905 module_param_named(fan_control, fan_control_allowed, bool, 0);
5906 MODULE_PARM_DESC(fan_control,
5907                  "Enables setting fan parameters features when true");
5908
5909 module_param_named(brightness_mode, brightness_mode, int, 0);
5910 MODULE_PARM_DESC(brightness_mode,
5911                  "Selects brightness control strategy: "
5912                  "0=auto, 1=EC, 2=CMOS, 3=both");
5913
5914 module_param(brightness_enable, uint, 0);
5915 MODULE_PARM_DESC(brightness_enable,
5916                  "Enables backlight control when 1, disables when 0");
5917
5918 module_param(hotkey_report_mode, uint, 0);
5919 MODULE_PARM_DESC(hotkey_report_mode,
5920                  "used for backwards compatibility with userspace, "
5921                  "see documentation");
5922
5923 #define TPACPI_PARAM(feature) \
5924         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
5925         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
5926                          "at module load, see documentation")
5927
5928 TPACPI_PARAM(hotkey);
5929 TPACPI_PARAM(bluetooth);
5930 TPACPI_PARAM(video);
5931 TPACPI_PARAM(light);
5932 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5933 TPACPI_PARAM(dock);
5934 #endif
5935 #ifdef CONFIG_THINKPAD_ACPI_BAY
5936 TPACPI_PARAM(bay);
5937 #endif /* CONFIG_THINKPAD_ACPI_BAY */
5938 TPACPI_PARAM(cmos);
5939 TPACPI_PARAM(led);
5940 TPACPI_PARAM(beep);
5941 TPACPI_PARAM(ecdump);
5942 TPACPI_PARAM(brightness);
5943 TPACPI_PARAM(volume);
5944 TPACPI_PARAM(fan);
5945
5946 static void thinkpad_acpi_module_exit(void)
5947 {
5948         struct ibm_struct *ibm, *itmp;
5949
5950         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
5951
5952         list_for_each_entry_safe_reverse(ibm, itmp,
5953                                          &tpacpi_all_drivers,
5954                                          all_drivers) {
5955                 ibm_exit(ibm);
5956         }
5957
5958         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
5959
5960         if (tpacpi_inputdev) {
5961                 if (tp_features.input_device_registered)
5962                         input_unregister_device(tpacpi_inputdev);
5963                 else
5964                         input_free_device(tpacpi_inputdev);
5965         }
5966
5967         if (tpacpi_hwmon)
5968                 hwmon_device_unregister(tpacpi_hwmon);
5969
5970         if (tp_features.sensors_pdev_attrs_registered)
5971                 device_remove_file(&tpacpi_sensors_pdev->dev,
5972                                    &dev_attr_thinkpad_acpi_pdev_name);
5973         if (tpacpi_sensors_pdev)
5974                 platform_device_unregister(tpacpi_sensors_pdev);
5975         if (tpacpi_pdev)
5976                 platform_device_unregister(tpacpi_pdev);
5977
5978         if (tp_features.sensors_pdrv_attrs_registered)
5979                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
5980         if (tp_features.platform_drv_attrs_registered)
5981                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
5982
5983         if (tp_features.sensors_pdrv_registered)
5984                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
5985
5986         if (tp_features.platform_drv_registered)
5987                 platform_driver_unregister(&tpacpi_pdriver);
5988
5989         if (proc_dir)
5990                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
5991
5992         kfree(thinkpad_id.bios_version_str);
5993         kfree(thinkpad_id.ec_version_str);
5994         kfree(thinkpad_id.model_str);
5995 }
5996
5997
5998 static int __init thinkpad_acpi_module_init(void)
5999 {
6000         int ret, i;
6001
6002         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6003
6004         /* Parameter checking */
6005         if (hotkey_report_mode > 2)
6006                 return -EINVAL;
6007
6008         /* Driver-level probe */
6009
6010         get_thinkpad_model_data(&thinkpad_id);
6011         ret = probe_for_thinkpad();
6012         if (ret) {
6013                 thinkpad_acpi_module_exit();
6014                 return ret;
6015         }
6016
6017         /* Driver initialization */
6018
6019         TPACPI_ACPIHANDLE_INIT(ecrd);
6020         TPACPI_ACPIHANDLE_INIT(ecwr);
6021
6022         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6023         if (!proc_dir) {
6024                 printk(TPACPI_ERR
6025                        "unable to create proc dir " TPACPI_PROC_DIR);
6026                 thinkpad_acpi_module_exit();
6027                 return -ENODEV;
6028         }
6029         proc_dir->owner = THIS_MODULE;
6030
6031         ret = platform_driver_register(&tpacpi_pdriver);
6032         if (ret) {
6033                 printk(TPACPI_ERR
6034                        "unable to register main platform driver\n");
6035                 thinkpad_acpi_module_exit();
6036                 return ret;
6037         }
6038         tp_features.platform_drv_registered = 1;
6039
6040         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6041         if (ret) {
6042                 printk(TPACPI_ERR
6043                        "unable to register hwmon platform driver\n");
6044                 thinkpad_acpi_module_exit();
6045                 return ret;
6046         }
6047         tp_features.sensors_pdrv_registered = 1;
6048
6049         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6050         if (!ret) {
6051                 tp_features.platform_drv_attrs_registered = 1;
6052                 ret = tpacpi_create_driver_attributes(
6053                                         &tpacpi_hwmon_pdriver.driver);
6054         }
6055         if (ret) {
6056                 printk(TPACPI_ERR
6057                        "unable to create sysfs driver attributes\n");
6058                 thinkpad_acpi_module_exit();
6059                 return ret;
6060         }
6061         tp_features.sensors_pdrv_attrs_registered = 1;
6062
6063
6064         /* Device initialization */
6065         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6066                                                         NULL, 0);
6067         if (IS_ERR(tpacpi_pdev)) {
6068                 ret = PTR_ERR(tpacpi_pdev);
6069                 tpacpi_pdev = NULL;
6070                 printk(TPACPI_ERR "unable to register platform device\n");
6071                 thinkpad_acpi_module_exit();
6072                 return ret;
6073         }
6074         tpacpi_sensors_pdev = platform_device_register_simple(
6075                                                 TPACPI_HWMON_DRVR_NAME,
6076                                                 -1, NULL, 0);
6077         if (IS_ERR(tpacpi_sensors_pdev)) {
6078                 ret = PTR_ERR(tpacpi_sensors_pdev);
6079                 tpacpi_sensors_pdev = NULL;
6080                 printk(TPACPI_ERR
6081                        "unable to register hwmon platform device\n");
6082                 thinkpad_acpi_module_exit();
6083                 return ret;
6084         }
6085         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6086                                  &dev_attr_thinkpad_acpi_pdev_name);
6087         if (ret) {
6088                 printk(TPACPI_ERR
6089                        "unable to create sysfs hwmon device attributes\n");
6090                 thinkpad_acpi_module_exit();
6091                 return ret;
6092         }
6093         tp_features.sensors_pdev_attrs_registered = 1;
6094         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6095         if (IS_ERR(tpacpi_hwmon)) {
6096                 ret = PTR_ERR(tpacpi_hwmon);
6097                 tpacpi_hwmon = NULL;
6098                 printk(TPACPI_ERR "unable to register hwmon device\n");
6099                 thinkpad_acpi_module_exit();
6100                 return ret;
6101         }
6102         mutex_init(&tpacpi_inputdev_send_mutex);
6103         tpacpi_inputdev = input_allocate_device();
6104         if (!tpacpi_inputdev) {
6105                 printk(TPACPI_ERR "unable to allocate input device\n");
6106                 thinkpad_acpi_module_exit();
6107                 return -ENOMEM;
6108         } else {
6109                 /* Prepare input device, but don't register */
6110                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6111                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6112                 tpacpi_inputdev->id.bustype = BUS_HOST;
6113                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6114                                                 thinkpad_id.vendor :
6115                                                 PCI_VENDOR_ID_IBM;
6116                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6117                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6118         }
6119         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6120                 ret = ibm_init(&ibms_init[i]);
6121                 if (ret >= 0 && *ibms_init[i].param)
6122                         ret = ibms_init[i].data->write(ibms_init[i].param);
6123                 if (ret < 0) {
6124                         thinkpad_acpi_module_exit();
6125                         return ret;
6126                 }
6127         }
6128         ret = input_register_device(tpacpi_inputdev);
6129         if (ret < 0) {
6130                 printk(TPACPI_ERR "unable to register input device\n");
6131                 thinkpad_acpi_module_exit();
6132                 return ret;
6133         } else {
6134                 tp_features.input_device_registered = 1;
6135         }
6136
6137         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6138         return 0;
6139 }
6140
6141 /* Please remove this in year 2009 */
6142 MODULE_ALIAS("ibm_acpi");
6143
6144 /*
6145  * DMI matching for module autoloading
6146  *
6147  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6148  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6149  *
6150  * Only models listed in thinkwiki will be supported, so add yours
6151  * if it is not there yet.
6152  */
6153 #define IBM_BIOS_MODULE_ALIAS(__type) \
6154         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6155
6156 /* Non-ancient thinkpads */
6157 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6158 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6159
6160 /* Ancient thinkpad BIOSes have to be identified by
6161  * BIOS type or model number, and there are far less
6162  * BIOS types than model numbers... */
6163 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6164 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6165 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6166
6167 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6168 MODULE_DESCRIPTION(TPACPI_DESC);
6169 MODULE_VERSION(TPACPI_VERSION);
6170 MODULE_LICENSE("GPL");
6171
6172 module_init(thinkpad_acpi_module_init);
6173 module_exit(thinkpad_acpi_module_exit);