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) 2006-2007 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 "0.18"
  25 #define TPACPI_SYSFS_VERSION 0x020101
  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 static int hotkey_inputdev_open(struct input_dev *dev)
1421 {
1422         switch (tpacpi_lifecycle) {
1423         case TPACPI_LIFE_INIT:
1424                 /*
1425                  * hotkey_init will call hotkey_poll_setup_safe
1426                  * at the appropriate moment
1427                  */
1428                 return 0;
1429         case TPACPI_LIFE_EXITING:
1430                 return -EBUSY;
1431         case TPACPI_LIFE_RUNNING:
1432                 hotkey_poll_setup_safe(0);
1433                 return 0;
1434         }
1435
1436         /* Should only happen if tpacpi_lifecycle is corrupt */
1437         BUG();
1438         return -EBUSY;
1439 }
1440
1441 static void hotkey_inputdev_close(struct input_dev *dev)
1442 {
1443         /* disable hotkey polling when possible */
1444         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1445                 hotkey_poll_setup_safe(0);
1446 }
1447 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1448
1449 /* sysfs hotkey enable ------------------------------------------------- */
1450 static ssize_t hotkey_enable_show(struct device *dev,
1451                            struct device_attribute *attr,
1452                            char *buf)
1453 {
1454         int res, status;
1455
1456         res = hotkey_status_get(&status);
1457         if (res)
1458                 return res;
1459
1460         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1461 }
1462
1463 static ssize_t hotkey_enable_store(struct device *dev,
1464                             struct device_attribute *attr,
1465                             const char *buf, size_t count)
1466 {
1467         unsigned long t;
1468         int res;
1469
1470         if (parse_strtoul(buf, 1, &t))
1471                 return -EINVAL;
1472
1473         res = hotkey_status_set(t);
1474
1475         return (res) ? res : count;
1476 }
1477
1478 static struct device_attribute dev_attr_hotkey_enable =
1479         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1480                 hotkey_enable_show, hotkey_enable_store);
1481
1482 /* sysfs hotkey mask --------------------------------------------------- */
1483 static ssize_t hotkey_mask_show(struct device *dev,
1484                            struct device_attribute *attr,
1485                            char *buf)
1486 {
1487         int res;
1488
1489         if (mutex_lock_interruptible(&hotkey_mutex))
1490                 return -ERESTARTSYS;
1491         res = hotkey_mask_get();
1492         mutex_unlock(&hotkey_mutex);
1493
1494         return (res)?
1495                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1496 }
1497
1498 static ssize_t hotkey_mask_store(struct device *dev,
1499                             struct device_attribute *attr,
1500                             const char *buf, size_t count)
1501 {
1502         unsigned long t;
1503         int res;
1504
1505         if (parse_strtoul(buf, 0xffffffffUL, &t))
1506                 return -EINVAL;
1507
1508         if (mutex_lock_interruptible(&hotkey_mutex))
1509                 return -ERESTARTSYS;
1510
1511         res = hotkey_mask_set(t);
1512
1513 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1514         hotkey_poll_setup(1);
1515 #endif
1516
1517         mutex_unlock(&hotkey_mutex);
1518
1519         return (res) ? res : count;
1520 }
1521
1522 static struct device_attribute dev_attr_hotkey_mask =
1523         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1524                 hotkey_mask_show, hotkey_mask_store);
1525
1526 /* sysfs hotkey bios_enabled ------------------------------------------- */
1527 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1528                            struct device_attribute *attr,
1529                            char *buf)
1530 {
1531         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1532 }
1533
1534 static struct device_attribute dev_attr_hotkey_bios_enabled =
1535         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1536
1537 /* sysfs hotkey bios_mask ---------------------------------------------- */
1538 static ssize_t hotkey_bios_mask_show(struct device *dev,
1539                            struct device_attribute *attr,
1540                            char *buf)
1541 {
1542         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1543 }
1544
1545 static struct device_attribute dev_attr_hotkey_bios_mask =
1546         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1547
1548 /* sysfs hotkey all_mask ----------------------------------------------- */
1549 static ssize_t hotkey_all_mask_show(struct device *dev,
1550                            struct device_attribute *attr,
1551                            char *buf)
1552 {
1553         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1554                                 hotkey_all_mask | hotkey_source_mask);
1555 }
1556
1557 static struct device_attribute dev_attr_hotkey_all_mask =
1558         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1559
1560 /* sysfs hotkey recommended_mask --------------------------------------- */
1561 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1562                                             struct device_attribute *attr,
1563                                             char *buf)
1564 {
1565         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1566                         (hotkey_all_mask | hotkey_source_mask)
1567                         & ~hotkey_reserved_mask);
1568 }
1569
1570 static struct device_attribute dev_attr_hotkey_recommended_mask =
1571         __ATTR(hotkey_recommended_mask, S_IRUGO,
1572                 hotkey_recommended_mask_show, NULL);
1573
1574 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1575
1576 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1577 static ssize_t hotkey_source_mask_show(struct device *dev,
1578                            struct device_attribute *attr,
1579                            char *buf)
1580 {
1581         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1582 }
1583
1584 static ssize_t hotkey_source_mask_store(struct device *dev,
1585                             struct device_attribute *attr,
1586                             const char *buf, size_t count)
1587 {
1588         unsigned long t;
1589
1590         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1591                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1592                 return -EINVAL;
1593
1594         if (mutex_lock_interruptible(&hotkey_mutex))
1595                 return -ERESTARTSYS;
1596
1597         HOTKEY_CONFIG_CRITICAL_START
1598         hotkey_source_mask = t;
1599         HOTKEY_CONFIG_CRITICAL_END
1600
1601         hotkey_poll_setup(1);
1602
1603         mutex_unlock(&hotkey_mutex);
1604
1605         return count;
1606 }
1607
1608 static struct device_attribute dev_attr_hotkey_source_mask =
1609         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1610                 hotkey_source_mask_show, hotkey_source_mask_store);
1611
1612 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1613 static ssize_t hotkey_poll_freq_show(struct device *dev,
1614                            struct device_attribute *attr,
1615                            char *buf)
1616 {
1617         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1618 }
1619
1620 static ssize_t hotkey_poll_freq_store(struct device *dev,
1621                             struct device_attribute *attr,
1622                             const char *buf, size_t count)
1623 {
1624         unsigned long t;
1625
1626         if (parse_strtoul(buf, 25, &t))
1627                 return -EINVAL;
1628
1629         if (mutex_lock_interruptible(&hotkey_mutex))
1630                 return -ERESTARTSYS;
1631
1632         hotkey_poll_freq = t;
1633
1634         hotkey_poll_setup(1);
1635         mutex_unlock(&hotkey_mutex);
1636
1637         return count;
1638 }
1639
1640 static struct device_attribute dev_attr_hotkey_poll_freq =
1641         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1642                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1643
1644 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1645
1646 /* sysfs hotkey radio_sw ----------------------------------------------- */
1647 static ssize_t hotkey_radio_sw_show(struct device *dev,
1648                            struct device_attribute *attr,
1649                            char *buf)
1650 {
1651         int res, s;
1652         res = hotkey_get_wlsw(&s);
1653         if (res < 0)
1654                 return res;
1655
1656         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1657 }
1658
1659 static struct device_attribute dev_attr_hotkey_radio_sw =
1660         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1661
1662 /* sysfs hotkey report_mode -------------------------------------------- */
1663 static ssize_t hotkey_report_mode_show(struct device *dev,
1664                            struct device_attribute *attr,
1665                            char *buf)
1666 {
1667         return snprintf(buf, PAGE_SIZE, "%d\n",
1668                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1669 }
1670
1671 static struct device_attribute dev_attr_hotkey_report_mode =
1672         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1673
1674 /* sysfs wakeup reason ------------------------------------------------- */
1675 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1676                            struct device_attribute *attr,
1677                            char *buf)
1678 {
1679         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1680 }
1681
1682 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1683         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1684
1685 /* sysfs wakeup hotunplug_complete ------------------------------------- */
1686 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1687                            struct device_attribute *attr,
1688                            char *buf)
1689 {
1690         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1691 }
1692
1693 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1694         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1695                hotkey_wakeup_hotunplug_complete_show, NULL);
1696
1697 /* --------------------------------------------------------------------- */
1698
1699 static struct attribute *hotkey_attributes[] __initdata = {
1700         &dev_attr_hotkey_enable.attr,
1701         &dev_attr_hotkey_bios_enabled.attr,
1702         &dev_attr_hotkey_report_mode.attr,
1703 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1704         &dev_attr_hotkey_mask.attr,
1705         &dev_attr_hotkey_all_mask.attr,
1706         &dev_attr_hotkey_recommended_mask.attr,
1707         &dev_attr_hotkey_source_mask.attr,
1708         &dev_attr_hotkey_poll_freq.attr,
1709 #endif
1710 };
1711
1712 static struct attribute *hotkey_mask_attributes[] __initdata = {
1713         &dev_attr_hotkey_bios_mask.attr,
1714 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1715         &dev_attr_hotkey_mask.attr,
1716         &dev_attr_hotkey_all_mask.attr,
1717         &dev_attr_hotkey_recommended_mask.attr,
1718 #endif
1719         &dev_attr_hotkey_wakeup_reason.attr,
1720         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1721 };
1722
1723 static int __init hotkey_init(struct ibm_init_struct *iibm)
1724 {
1725         /* Requirements for changing the default keymaps:
1726          *
1727          * 1. Many of the keys are mapped to KEY_RESERVED for very
1728          *    good reasons.  Do not change them unless you have deep
1729          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1730          *    the various ThinkPad models.  The driver behaves
1731          *    differently for KEY_RESERVED: such keys have their
1732          *    hot key mask *unset* in mask_recommended, and also
1733          *    in the initial hot key mask programmed into the
1734          *    firmware at driver load time, which means the firm-
1735          *    ware may react very differently if you change them to
1736          *    something else;
1737          *
1738          * 2. You must be subscribed to the linux-thinkpad and
1739          *    ibm-acpi-devel mailing lists, and you should read the
1740          *    list archives since 2007 if you want to change the
1741          *    keymaps.  This requirement exists so that you will
1742          *    know the past history of problems with the thinkpad-
1743          *    acpi driver keymaps, and also that you will be
1744          *    listening to any bug reports;
1745          *
1746          * 3. Do not send thinkpad-acpi specific patches directly to
1747          *    for merging, *ever*.  Send them to the linux-acpi
1748          *    mailinglist for comments.  Merging is to be done only
1749          *    through acpi-test and the ACPI maintainer.
1750          *
1751          * If the above is too much to ask, don't change the keymap.
1752          * Ask the thinkpad-acpi maintainer to do it, instead.
1753          */
1754         static u16 ibm_keycode_map[] __initdata = {
1755                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1756                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1757                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1758                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1759
1760                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1761                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1762                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1763                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1764
1765                 /* brightness: firmware always reacts to them, unless
1766                  * X.org did some tricks in the radeon BIOS scratch
1767                  * registers of *some* models */
1768                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1769                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1770
1771                 /* Thinklight: firmware always react to it */
1772                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1773
1774                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1775                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1776
1777                 /* Volume: firmware always react to it and reprograms
1778                  * the built-in *extra* mixer.  Never map it to control
1779                  * another mixer by default. */
1780                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1781                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1782                 KEY_RESERVED,   /* 0x16: MUTE */
1783
1784                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1785
1786                 /* (assignments unknown, please report if found) */
1787                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1788                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1789         };
1790         static u16 lenovo_keycode_map[] __initdata = {
1791                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1792                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1793                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1794                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1795
1796                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1797                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1798                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1799                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1800
1801                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1802                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1803
1804                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1805
1806                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1807                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1808
1809                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1810                  * react to it and reprograms the built-in *extra* mixer.
1811                  * Never map it to control another mixer by default.
1812                  *
1813                  * T60?, T61, R60?, R61: firmware and EC tries to send
1814                  * these over the regular keyboard, so these are no-ops,
1815                  * but there are still weird bugs re. MUTE, so do not
1816                  * change unless you get test reports from all Lenovo
1817                  * models.  May cause the BIOS to interfere with the
1818                  * HDA mixer.
1819                  */
1820                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1821                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1822                 KEY_RESERVED,   /* 0x16: MUTE */
1823
1824                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1825
1826                 /* (assignments unknown, please report if found) */
1827                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1828                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1829         };
1830
1831 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
1832 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
1833 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
1834
1835         int res, i;
1836         int status;
1837         int hkeyv;
1838
1839         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1840
1841         BUG_ON(!tpacpi_inputdev);
1842         BUG_ON(tpacpi_inputdev->open != NULL ||
1843                tpacpi_inputdev->close != NULL);
1844
1845         TPACPI_ACPIHANDLE_INIT(hkey);
1846         mutex_init(&hotkey_mutex);
1847
1848 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1849         mutex_init(&hotkey_thread_mutex);
1850         mutex_init(&hotkey_thread_data_mutex);
1851 #endif
1852
1853         /* hotkey not supported on 570 */
1854         tp_features.hotkey = hkey_handle != NULL;
1855
1856         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1857                 str_supported(tp_features.hotkey));
1858
1859         if (tp_features.hotkey) {
1860                 hotkey_dev_attributes = create_attr_set(12, NULL);
1861                 if (!hotkey_dev_attributes)
1862                         return -ENOMEM;
1863                 res = add_many_to_attr_set(hotkey_dev_attributes,
1864                                 hotkey_attributes,
1865                                 ARRAY_SIZE(hotkey_attributes));
1866                 if (res)
1867                         return res;
1868
1869                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1870                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
1871                    for HKEY interface version 0x100 */
1872                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1873                         if ((hkeyv >> 8) != 1) {
1874                                 printk(TPACPI_ERR "unknown version of the "
1875                                        "HKEY interface: 0x%x\n", hkeyv);
1876                                 printk(TPACPI_ERR "please report this to %s\n",
1877                                        TPACPI_MAIL);
1878                         } else {
1879                                 /*
1880                                  * MHKV 0x100 in A31, R40, R40e,
1881                                  * T4x, X31, and later
1882                                  */
1883                                 tp_features.hotkey_mask = 1;
1884                         }
1885                 }
1886
1887                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1888                         str_supported(tp_features.hotkey_mask));
1889
1890                 if (tp_features.hotkey_mask) {
1891                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1892                                         "MHKA", "qd")) {
1893                                 printk(TPACPI_ERR
1894                                        "missing MHKA handler, "
1895                                        "please report this to %s\n",
1896                                        TPACPI_MAIL);
1897                                 /* FN+F12, FN+F4, FN+F3 */
1898                                 hotkey_all_mask = 0x080cU;
1899                         }
1900                 }
1901
1902                 /* hotkey_source_mask *must* be zero for
1903                  * the first hotkey_mask_get */
1904                 res = hotkey_status_get(&hotkey_orig_status);
1905                 if (!res && tp_features.hotkey_mask) {
1906                         res = hotkey_mask_get();
1907                         hotkey_orig_mask = hotkey_mask;
1908                         if (!res) {
1909                                 res = add_many_to_attr_set(
1910                                         hotkey_dev_attributes,
1911                                         hotkey_mask_attributes,
1912                                         ARRAY_SIZE(hotkey_mask_attributes));
1913                         }
1914                 }
1915
1916 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1917                 if (tp_features.hotkey_mask) {
1918                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
1919                                                 & ~hotkey_all_mask;
1920                 } else {
1921                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
1922                 }
1923
1924                 vdbg_printk(TPACPI_DBG_INIT,
1925                             "hotkey source mask 0x%08x, polling freq %d\n",
1926                             hotkey_source_mask, hotkey_poll_freq);
1927 #endif
1928
1929                 /* Not all thinkpads have a hardware radio switch */
1930                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1931                         tp_features.hotkey_wlsw = 1;
1932                         printk(TPACPI_INFO
1933                                 "radio switch found; radios are %s\n",
1934                                 enabled(status, 0));
1935                         res = add_to_attr_set(hotkey_dev_attributes,
1936                                         &dev_attr_hotkey_radio_sw.attr);
1937                 }
1938
1939                 if (!res)
1940                         res = register_attr_set_with_sysfs(
1941                                         hotkey_dev_attributes,
1942                                         &tpacpi_pdev->dev.kobj);
1943                 if (res)
1944                         return res;
1945
1946                 /* Set up key map */
1947
1948                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1949                                                 GFP_KERNEL);
1950                 if (!hotkey_keycode_map) {
1951                         printk(TPACPI_ERR
1952                                 "failed to allocate memory for key map\n");
1953                         return -ENOMEM;
1954                 }
1955
1956                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1957                         dbg_printk(TPACPI_DBG_INIT,
1958                                    "using Lenovo default hot key map\n");
1959                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1960                                 TPACPI_HOTKEY_MAP_SIZE);
1961                 } else {
1962                         dbg_printk(TPACPI_DBG_INIT,
1963                                    "using IBM default hot key map\n");
1964                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1965                                 TPACPI_HOTKEY_MAP_SIZE);
1966                 }
1967
1968                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1969                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1970                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1971                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1972                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1973                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1974                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1975                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1976                                 set_bit(hotkey_keycode_map[i],
1977                                         tpacpi_inputdev->keybit);
1978                         } else {
1979                                 if (i < sizeof(hotkey_reserved_mask)*8)
1980                                         hotkey_reserved_mask |= 1 << i;
1981                         }
1982                 }
1983
1984                 if (tp_features.hotkey_wlsw) {
1985                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1986                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1987                 }
1988
1989                 dbg_printk(TPACPI_DBG_INIT,
1990                                 "enabling hot key handling\n");
1991                 res = hotkey_status_set(1);
1992                 if (res)
1993                         return res;
1994                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
1995                                         & ~hotkey_reserved_mask)
1996                                         | hotkey_orig_mask);
1997                 if (res < 0 && res != -ENXIO)
1998                         return res;
1999
2000                 dbg_printk(TPACPI_DBG_INIT,
2001                                 "legacy hot key reporting over procfs %s\n",
2002                                 (hotkey_report_mode < 2) ?
2003                                         "enabled" : "disabled");
2004
2005 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2006                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2007                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2008
2009                 hotkey_poll_setup_safe(1);
2010 #endif
2011         }
2012
2013         return (tp_features.hotkey)? 0 : 1;
2014 }
2015
2016 static void hotkey_exit(void)
2017 {
2018 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2019         hotkey_poll_stop_sync();
2020 #endif
2021
2022         if (tp_features.hotkey) {
2023                 dbg_printk(TPACPI_DBG_EXIT,
2024                            "restoring original hot key mask\n");
2025                 /* no short-circuit boolean operator below! */
2026                 if ((hotkey_mask_set(hotkey_orig_mask) |
2027                      hotkey_status_set(hotkey_orig_status)) != 0)
2028                         printk(TPACPI_ERR
2029                                "failed to restore hot key mask "
2030                                "to BIOS defaults\n");
2031         }
2032
2033         if (hotkey_dev_attributes) {
2034                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2035                 hotkey_dev_attributes = NULL;
2036         }
2037 }
2038
2039 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2040 {
2041         u32 hkey;
2042         unsigned int scancode;
2043         int send_acpi_ev;
2044         int ignore_acpi_ev;
2045         int unk_ev;
2046
2047         if (event != 0x80) {
2048                 printk(TPACPI_ERR
2049                        "unknown HKEY notification event %d\n", event);
2050                 /* forward it to userspace, maybe it knows how to handle it */
2051                 acpi_bus_generate_netlink_event(
2052                                         ibm->acpi->device->pnp.device_class,
2053                                         ibm->acpi->device->dev.bus_id,
2054                                         event, 0);
2055                 return;
2056         }
2057
2058         while (1) {
2059                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2060                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2061                         return;
2062                 }
2063
2064                 if (hkey == 0) {
2065                         /* queue empty */
2066                         return;
2067                 }
2068
2069                 send_acpi_ev = 1;
2070                 ignore_acpi_ev = 0;
2071                 unk_ev = 0;
2072
2073                 switch (hkey >> 12) {
2074                 case 1:
2075                         /* 0x1000-0x1FFF: key presses */
2076                         scancode = hkey & 0xfff;
2077                         if (scancode > 0 && scancode < 0x21) {
2078                                 scancode--;
2079                                 if (!(hotkey_source_mask & (1 << scancode))) {
2080                                         tpacpi_input_send_key(scancode);
2081                                         send_acpi_ev = 0;
2082                                 } else {
2083                                         ignore_acpi_ev = 1;
2084                                 }
2085                         } else {
2086                                 unk_ev = 1;
2087                         }
2088                         break;
2089                 case 2:
2090                         /* Wakeup reason */
2091                         switch (hkey) {
2092                         case 0x2304: /* suspend, undock */
2093                         case 0x2404: /* hibernation, undock */
2094                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2095                                 ignore_acpi_ev = 1;
2096                                 break;
2097                         case 0x2305: /* suspend, bay eject */
2098                         case 0x2405: /* hibernation, bay eject */
2099                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2100                                 ignore_acpi_ev = 1;
2101                                 break;
2102                         default:
2103                                 unk_ev = 1;
2104                         }
2105                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2106                                 printk(TPACPI_INFO
2107                                        "woke up due to a hot-unplug "
2108                                        "request...\n");
2109                         }
2110                         break;
2111                 case 3:
2112                         /* bay-related wakeups */
2113                         if (hkey == 0x3003) {
2114                                 hotkey_autosleep_ack = 1;
2115                                 printk(TPACPI_INFO
2116                                        "bay ejected\n");
2117                         } else {
2118                                 unk_ev = 1;
2119                         }
2120                         break;
2121                 case 4:
2122                         /* dock-related wakeups */
2123                         if (hkey == 0x4003) {
2124                                 hotkey_autosleep_ack = 1;
2125                                 printk(TPACPI_INFO
2126                                        "undocked\n");
2127                         } else {
2128                                 unk_ev = 1;
2129                         }
2130                         break;
2131                 case 5:
2132                         /* 0x5000-0x5FFF: human interface helpers */
2133                         switch (hkey) {
2134                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2135                         case 0x5009: /* X61t: swivel up (tablet mode) */
2136                         case 0x500a: /* X61t: swivel down (normal mode) */
2137                         case 0x500b: /* X61t: tablet pen inserted into bay */
2138                         case 0x500c: /* X61t: tablet pen removed from bay */
2139                                 break;
2140                         case 0x5001:
2141                         case 0x5002:
2142                                 /* LID switch events.  Do not propagate */
2143                                 ignore_acpi_ev = 1;
2144                                 break;
2145                         default:
2146                                 unk_ev = 1;
2147                         }
2148                         break;
2149                 case 7:
2150                         /* 0x7000-0x7FFF: misc */
2151                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2152                                 tpacpi_input_send_radiosw();
2153                                 send_acpi_ev = 0;
2154                                 break;
2155                         }
2156                         /* fallthrough to default */
2157                 default:
2158                         unk_ev = 1;
2159                 }
2160                 if (unk_ev) {
2161                         printk(TPACPI_NOTICE
2162                                "unhandled HKEY event 0x%04x\n", hkey);
2163                 }
2164
2165                 /* Legacy events */
2166                 if (!ignore_acpi_ev &&
2167                     (send_acpi_ev || hotkey_report_mode < 2)) {
2168                         acpi_bus_generate_proc_event(ibm->acpi->device,
2169                                                      event, hkey);
2170                 }
2171
2172                 /* netlink events */
2173                 if (!ignore_acpi_ev && send_acpi_ev) {
2174                         acpi_bus_generate_netlink_event(
2175                                         ibm->acpi->device->pnp.device_class,
2176                                         ibm->acpi->device->dev.bus_id,
2177                                         event, hkey);
2178                 }
2179         }
2180 }
2181
2182 static void hotkey_suspend(pm_message_t state)
2183 {
2184         /* Do these on suspend, we get the events on early resume! */
2185         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2186         hotkey_autosleep_ack = 0;
2187 }
2188
2189 static void hotkey_resume(void)
2190 {
2191         if (hotkey_mask_get())
2192                 printk(TPACPI_ERR
2193                        "error while trying to read hot key mask "
2194                        "from firmware\n");
2195         tpacpi_input_send_radiosw();
2196 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2197         hotkey_poll_setup_safe(0);
2198 #endif
2199 }
2200
2201 /* procfs -------------------------------------------------------------- */
2202 static int hotkey_read(char *p)
2203 {
2204         int res, status;
2205         int len = 0;
2206
2207         if (!tp_features.hotkey) {
2208                 len += sprintf(p + len, "status:\t\tnot supported\n");
2209                 return len;
2210         }
2211
2212         if (mutex_lock_interruptible(&hotkey_mutex))
2213                 return -ERESTARTSYS;
2214         res = hotkey_status_get(&status);
2215         if (!res)
2216                 res = hotkey_mask_get();
2217         mutex_unlock(&hotkey_mutex);
2218         if (res)
2219                 return res;
2220
2221         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2222         if (tp_features.hotkey_mask) {
2223                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2224                 len += sprintf(p + len,
2225                                "commands:\tenable, disable, reset, <mask>\n");
2226         } else {
2227                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2228                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2229         }
2230
2231         return len;
2232 }
2233
2234 static int hotkey_write(char *buf)
2235 {
2236         int res, status;
2237         u32 mask;
2238         char *cmd;
2239
2240         if (!tp_features.hotkey)
2241                 return -ENODEV;
2242
2243         if (mutex_lock_interruptible(&hotkey_mutex))
2244                 return -ERESTARTSYS;
2245
2246         status = -1;
2247         mask = hotkey_mask;
2248
2249         res = 0;
2250         while ((cmd = next_cmd(&buf))) {
2251                 if (strlencmp(cmd, "enable") == 0) {
2252                         status = 1;
2253                 } else if (strlencmp(cmd, "disable") == 0) {
2254                         status = 0;
2255                 } else if (strlencmp(cmd, "reset") == 0) {
2256                         status = hotkey_orig_status;
2257                         mask = hotkey_orig_mask;
2258                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2259                         /* mask set */
2260                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2261                         /* mask set */
2262                 } else {
2263                         res = -EINVAL;
2264                         goto errexit;
2265                 }
2266         }
2267         if (status != -1)
2268                 res = hotkey_status_set(status);
2269
2270         if (!res && mask != hotkey_mask)
2271                 res = hotkey_mask_set(mask);
2272
2273 errexit:
2274         mutex_unlock(&hotkey_mutex);
2275         return res;
2276 }
2277
2278 static const struct acpi_device_id ibm_htk_device_ids[] = {
2279         {TPACPI_ACPI_HKEY_HID, 0},
2280         {"", 0},
2281 };
2282
2283 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2284         .hid = ibm_htk_device_ids,
2285         .notify = hotkey_notify,
2286         .handle = &hkey_handle,
2287         .type = ACPI_DEVICE_NOTIFY,
2288 };
2289
2290 static struct ibm_struct hotkey_driver_data = {
2291         .name = "hotkey",
2292         .read = hotkey_read,
2293         .write = hotkey_write,
2294         .exit = hotkey_exit,
2295         .resume = hotkey_resume,
2296         .suspend = hotkey_suspend,
2297         .acpi = &ibm_hotkey_acpidriver,
2298 };
2299
2300 /*************************************************************************
2301  * Bluetooth subdriver
2302  */
2303
2304 enum {
2305         /* ACPI GBDC/SBDC bits */
2306         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2307         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2308         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2309 };
2310
2311 static int bluetooth_get_radiosw(void);
2312 static int bluetooth_set_radiosw(int radio_on);
2313
2314 /* sysfs bluetooth enable ---------------------------------------------- */
2315 static ssize_t bluetooth_enable_show(struct device *dev,
2316                            struct device_attribute *attr,
2317                            char *buf)
2318 {
2319         int status;
2320
2321         status = bluetooth_get_radiosw();
2322         if (status < 0)
2323                 return status;
2324
2325         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2326 }
2327
2328 static ssize_t bluetooth_enable_store(struct device *dev,
2329                             struct device_attribute *attr,
2330                             const char *buf, size_t count)
2331 {
2332         unsigned long t;
2333         int res;
2334
2335         if (parse_strtoul(buf, 1, &t))
2336                 return -EINVAL;
2337
2338         res = bluetooth_set_radiosw(t);
2339
2340         return (res) ? res : count;
2341 }
2342
2343 static struct device_attribute dev_attr_bluetooth_enable =
2344         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2345                 bluetooth_enable_show, bluetooth_enable_store);
2346
2347 /* --------------------------------------------------------------------- */
2348
2349 static struct attribute *bluetooth_attributes[] = {
2350         &dev_attr_bluetooth_enable.attr,
2351         NULL
2352 };
2353
2354 static const struct attribute_group bluetooth_attr_group = {
2355         .attrs = bluetooth_attributes,
2356 };
2357
2358 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2359 {
2360         int res;
2361         int status = 0;
2362
2363         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2364
2365         TPACPI_ACPIHANDLE_INIT(hkey);
2366
2367         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2368            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2369         tp_features.bluetooth = hkey_handle &&
2370             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2371
2372         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2373                 str_supported(tp_features.bluetooth),
2374                 status);
2375
2376         if (tp_features.bluetooth) {
2377                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2378                         /* no bluetooth hardware present in system */
2379                         tp_features.bluetooth = 0;
2380                         dbg_printk(TPACPI_DBG_INIT,
2381                                    "bluetooth hardware not installed\n");
2382                 } else {
2383                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2384                                         &bluetooth_attr_group);
2385                         if (res)
2386                                 return res;
2387                 }
2388         }
2389
2390         return (tp_features.bluetooth)? 0 : 1;
2391 }
2392
2393 static void bluetooth_exit(void)
2394 {
2395         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2396                         &bluetooth_attr_group);
2397 }
2398
2399 static int bluetooth_get_radiosw(void)
2400 {
2401         int status;
2402
2403         if (!tp_features.bluetooth)
2404                 return -ENODEV;
2405
2406         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2407                 return -EIO;
2408
2409         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2410 }
2411
2412 static int bluetooth_set_radiosw(int radio_on)
2413 {
2414         int status;
2415
2416         if (!tp_features.bluetooth)
2417                 return -ENODEV;
2418
2419         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2420                 return -EIO;
2421         if (radio_on)
2422                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2423         else
2424                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2425         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2426                 return -EIO;
2427
2428         return 0;
2429 }
2430
2431 /* procfs -------------------------------------------------------------- */
2432 static int bluetooth_read(char *p)
2433 {
2434         int len = 0;
2435         int status = bluetooth_get_radiosw();
2436
2437         if (!tp_features.bluetooth)
2438                 len += sprintf(p + len, "status:\t\tnot supported\n");
2439         else {
2440                 len += sprintf(p + len, "status:\t\t%s\n",
2441                                 (status)? "enabled" : "disabled");
2442                 len += sprintf(p + len, "commands:\tenable, disable\n");
2443         }
2444
2445         return len;
2446 }
2447
2448 static int bluetooth_write(char *buf)
2449 {
2450         char *cmd;
2451
2452         if (!tp_features.bluetooth)
2453                 return -ENODEV;
2454
2455         while ((cmd = next_cmd(&buf))) {
2456                 if (strlencmp(cmd, "enable") == 0) {
2457                         bluetooth_set_radiosw(1);
2458                 } else if (strlencmp(cmd, "disable") == 0) {
2459                         bluetooth_set_radiosw(0);
2460                 } else
2461                         return -EINVAL;
2462         }
2463
2464         return 0;
2465 }
2466
2467 static struct ibm_struct bluetooth_driver_data = {
2468         .name = "bluetooth",
2469         .read = bluetooth_read,
2470         .write = bluetooth_write,
2471         .exit = bluetooth_exit,
2472 };
2473
2474 /*************************************************************************
2475  * Wan subdriver
2476  */
2477
2478 enum {
2479         /* ACPI GWAN/SWAN bits */
2480         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2481         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2482         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2483 };
2484
2485 static int wan_get_radiosw(void);
2486 static int wan_set_radiosw(int radio_on);
2487
2488 /* sysfs wan enable ---------------------------------------------------- */
2489 static ssize_t wan_enable_show(struct device *dev,
2490                            struct device_attribute *attr,
2491                            char *buf)
2492 {
2493         int status;
2494
2495         status = wan_get_radiosw();
2496         if (status < 0)
2497                 return status;
2498
2499         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2500 }
2501
2502 static ssize_t wan_enable_store(struct device *dev,
2503                             struct device_attribute *attr,
2504                             const char *buf, size_t count)
2505 {
2506         unsigned long t;
2507         int res;
2508
2509         if (parse_strtoul(buf, 1, &t))
2510                 return -EINVAL;
2511
2512         res = wan_set_radiosw(t);
2513
2514         return (res) ? res : count;
2515 }
2516
2517 static struct device_attribute dev_attr_wan_enable =
2518         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2519                 wan_enable_show, wan_enable_store);
2520
2521 /* --------------------------------------------------------------------- */
2522
2523 static struct attribute *wan_attributes[] = {
2524         &dev_attr_wan_enable.attr,
2525         NULL
2526 };
2527
2528 static const struct attribute_group wan_attr_group = {
2529         .attrs = wan_attributes,
2530 };
2531
2532 static int __init wan_init(struct ibm_init_struct *iibm)
2533 {
2534         int res;
2535         int status = 0;
2536
2537         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2538
2539         TPACPI_ACPIHANDLE_INIT(hkey);
2540
2541         tp_features.wan = hkey_handle &&
2542             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2543
2544         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2545                 str_supported(tp_features.wan),
2546                 status);
2547
2548         if (tp_features.wan) {
2549                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2550                         /* no wan hardware present in system */
2551                         tp_features.wan = 0;
2552                         dbg_printk(TPACPI_DBG_INIT,
2553                                    "wan hardware not installed\n");
2554                 } else {
2555                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2556                                         &wan_attr_group);
2557                         if (res)
2558                                 return res;
2559                 }
2560         }
2561
2562         return (tp_features.wan)? 0 : 1;
2563 }
2564
2565 static void wan_exit(void)
2566 {
2567         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2568                 &wan_attr_group);
2569 }
2570
2571 static int wan_get_radiosw(void)
2572 {
2573         int status;
2574
2575         if (!tp_features.wan)
2576                 return -ENODEV;
2577
2578         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2579                 return -EIO;
2580
2581         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2582 }
2583
2584 static int wan_set_radiosw(int radio_on)
2585 {
2586         int status;
2587
2588         if (!tp_features.wan)
2589                 return -ENODEV;
2590
2591         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2592                 return -EIO;
2593         if (radio_on)
2594                 status |= TP_ACPI_WANCARD_RADIOSSW;
2595         else
2596                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2597         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2598                 return -EIO;
2599
2600         return 0;
2601 }
2602
2603 /* procfs -------------------------------------------------------------- */
2604 static int wan_read(char *p)
2605 {
2606         int len = 0;
2607         int status = wan_get_radiosw();
2608
2609         if (!tp_features.wan)
2610                 len += sprintf(p + len, "status:\t\tnot supported\n");
2611         else {
2612                 len += sprintf(p + len, "status:\t\t%s\n",
2613                                 (status)? "enabled" : "disabled");
2614                 len += sprintf(p + len, "commands:\tenable, disable\n");
2615         }
2616
2617         return len;
2618 }
2619
2620 static int wan_write(char *buf)
2621 {
2622         char *cmd;
2623
2624         if (!tp_features.wan)
2625                 return -ENODEV;
2626
2627         while ((cmd = next_cmd(&buf))) {
2628                 if (strlencmp(cmd, "enable") == 0) {
2629                         wan_set_radiosw(1);
2630                 } else if (strlencmp(cmd, "disable") == 0) {
2631                         wan_set_radiosw(0);
2632                 } else
2633                         return -EINVAL;
2634         }
2635
2636         return 0;
2637 }
2638
2639 static struct ibm_struct wan_driver_data = {
2640         .name = "wan",
2641         .read = wan_read,
2642         .write = wan_write,
2643         .exit = wan_exit,
2644         .flags.experimental = 1,
2645 };
2646
2647 /*************************************************************************
2648  * Video subdriver
2649  */
2650
2651 enum video_access_mode {
2652         TPACPI_VIDEO_NONE = 0,
2653         TPACPI_VIDEO_570,       /* 570 */
2654         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2655         TPACPI_VIDEO_NEW,       /* all others */
2656 };
2657
2658 enum {  /* video status flags, based on VIDEO_570 */
2659         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2660         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2661         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2662 };
2663
2664 enum {  /* TPACPI_VIDEO_570 constants */
2665         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2666         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2667                                                  * video_status_flags */
2668         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2669         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2670 };
2671
2672 static enum video_access_mode video_supported;
2673 static int video_orig_autosw;
2674
2675 static int video_autosw_get(void);
2676 static int video_autosw_set(int enable);
2677
2678 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
2679            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
2680            "\\_SB.PCI0.VID0",   /* 770e */
2681            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
2682            "\\_SB.PCI0.AGP.VID",        /* all others */
2683            );                           /* R30, R31 */
2684
2685 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2686
2687 static int __init video_init(struct ibm_init_struct *iibm)
2688 {
2689         int ivga;
2690
2691         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2692
2693         TPACPI_ACPIHANDLE_INIT(vid);
2694         TPACPI_ACPIHANDLE_INIT(vid2);
2695
2696         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2697                 /* G41, assume IVGA doesn't change */
2698                 vid_handle = vid2_handle;
2699
2700         if (!vid_handle)
2701                 /* video switching not supported on R30, R31 */
2702                 video_supported = TPACPI_VIDEO_NONE;
2703         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2704                 /* 570 */
2705                 video_supported = TPACPI_VIDEO_570;
2706         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2707                 /* 600e/x, 770e, 770x */
2708                 video_supported = TPACPI_VIDEO_770;
2709         else
2710                 /* all others */
2711                 video_supported = TPACPI_VIDEO_NEW;
2712
2713         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2714                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2715                 video_supported);
2716
2717         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2718 }
2719
2720 static void video_exit(void)
2721 {
2722         dbg_printk(TPACPI_DBG_EXIT,
2723                    "restoring original video autoswitch mode\n");
2724         if (video_autosw_set(video_orig_autosw))
2725                 printk(TPACPI_ERR "error while trying to restore original "
2726                         "video autoswitch mode\n");
2727 }
2728
2729 static int video_outputsw_get(void)
2730 {
2731         int status = 0;
2732         int i;
2733
2734         switch (video_supported) {
2735         case TPACPI_VIDEO_570:
2736                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2737                                  TP_ACPI_VIDEO_570_PHSCMD))
2738                         return -EIO;
2739                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2740                 break;
2741         case TPACPI_VIDEO_770:
2742                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2743                         return -EIO;
2744                 if (i)
2745                         status |= TP_ACPI_VIDEO_S_LCD;
2746                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2747                         return -EIO;
2748                 if (i)
2749                         status |= TP_ACPI_VIDEO_S_CRT;
2750                 break;
2751         case TPACPI_VIDEO_NEW:
2752                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2753                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2754                         return -EIO;
2755                 if (i)
2756                         status |= TP_ACPI_VIDEO_S_CRT;
2757
2758                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2759                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2760                         return -EIO;
2761                 if (i)
2762                         status |= TP_ACPI_VIDEO_S_LCD;
2763                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
2764                         return -EIO;
2765                 if (i)
2766                         status |= TP_ACPI_VIDEO_S_DVI;
2767                 break;
2768         default:
2769                 return -ENOSYS;
2770         }
2771
2772         return status;
2773 }
2774
2775 static int video_outputsw_set(int status)
2776 {
2777         int autosw;
2778         int res = 0;
2779
2780         switch (video_supported) {
2781         case TPACPI_VIDEO_570:
2782                 res = acpi_evalf(NULL, NULL,
2783                                  "\\_SB.PHS2", "vdd",
2784                                  TP_ACPI_VIDEO_570_PHS2CMD,
2785                                  status | TP_ACPI_VIDEO_570_PHS2SET);
2786                 break;
2787         case TPACPI_VIDEO_770:
2788                 autosw = video_autosw_get();
2789                 if (autosw < 0)
2790                         return autosw;
2791
2792                 res = video_autosw_set(1);
2793                 if (res)
2794                         return res;
2795                 res = acpi_evalf(vid_handle, NULL,
2796                                  "ASWT", "vdd", status * 0x100, 0);
2797                 if (!autosw && video_autosw_set(autosw)) {
2798                         printk(TPACPI_ERR
2799                                "video auto-switch left enabled due to error\n");
2800                         return -EIO;
2801                 }
2802                 break;
2803         case TPACPI_VIDEO_NEW:
2804                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
2805                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
2806                 break;
2807         default:
2808                 return -ENOSYS;
2809         }
2810
2811         return (res)? 0 : -EIO;
2812 }
2813
2814 static int video_autosw_get(void)
2815 {
2816         int autosw = 0;
2817
2818         switch (video_supported) {
2819         case TPACPI_VIDEO_570:
2820                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
2821                         return -EIO;
2822                 break;
2823         case TPACPI_VIDEO_770:
2824         case TPACPI_VIDEO_NEW:
2825                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
2826                         return -EIO;
2827                 break;
2828         default:
2829                 return -ENOSYS;
2830         }
2831
2832         return autosw & 1;
2833 }
2834
2835 static int video_autosw_set(int enable)
2836 {
2837         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
2838                 return -EIO;
2839         return 0;
2840 }
2841
2842 static int video_outputsw_cycle(void)
2843 {
2844         int autosw = video_autosw_get();
2845         int res;
2846
2847         if (autosw < 0)
2848                 return autosw;
2849
2850         switch (video_supported) {
2851         case TPACPI_VIDEO_570:
2852                 res = video_autosw_set(1);
2853                 if (res)
2854                         return res;
2855                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
2856                 break;
2857         case TPACPI_VIDEO_770:
2858         case TPACPI_VIDEO_NEW:
2859                 res = video_autosw_set(1);
2860                 if (res)
2861                         return res;
2862                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
2863                 break;
2864         default:
2865                 return -ENOSYS;
2866         }
2867         if (!autosw && video_autosw_set(autosw)) {
2868                 printk(TPACPI_ERR
2869                        "video auto-switch left enabled due to error\n");
2870                 return -EIO;
2871         }
2872
2873         return (res)? 0 : -EIO;
2874 }
2875
2876 static int video_expand_toggle(void)
2877 {
2878         switch (video_supported) {
2879         case TPACPI_VIDEO_570:
2880                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
2881                         0 : -EIO;
2882         case TPACPI_VIDEO_770:
2883                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
2884                         0 : -EIO;
2885         case TPACPI_VIDEO_NEW:
2886                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
2887                         0 : -EIO;
2888         default:
2889                 return -ENOSYS;
2890         }
2891         /* not reached */
2892 }
2893
2894 static int video_read(char *p)
2895 {
2896         int status, autosw;
2897         int len = 0;
2898
2899         if (video_supported == TPACPI_VIDEO_NONE) {
2900                 len += sprintf(p + len, "status:\t\tnot supported\n");
2901                 return len;
2902         }
2903
2904         status = video_outputsw_get();
2905         if (status < 0)
2906                 return status;
2907
2908         autosw = video_autosw_get();
2909         if (autosw < 0)
2910                 return autosw;
2911
2912         len += sprintf(p + len, "status:\t\tsupported\n");
2913         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
2914         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
2915         if (video_supported == TPACPI_VIDEO_NEW)
2916                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
2917         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
2918         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
2919         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
2920         if (video_supported == TPACPI_VIDEO_NEW)
2921                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
2922         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
2923         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
2924
2925         return len;
2926 }
2927
2928 static int video_write(char *buf)
2929 {
2930         char *cmd;
2931         int enable, disable, status;
2932         int res;
2933
2934         if (video_supported == TPACPI_VIDEO_NONE)
2935                 return -ENODEV;
2936
2937         enable = 0;
2938         disable = 0;
2939
2940         while ((cmd = next_cmd(&buf))) {
2941                 if (strlencmp(cmd, "lcd_enable") == 0) {
2942                         enable |= TP_ACPI_VIDEO_S_LCD;
2943                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2944                         disable |= TP_ACPI_VIDEO_S_LCD;
2945                 } else if (strlencmp(cmd, "crt_enable") == 0) {
2946                         enable |= TP_ACPI_VIDEO_S_CRT;
2947                 } else if (strlencmp(cmd, "crt_disable") == 0) {
2948                         disable |= TP_ACPI_VIDEO_S_CRT;
2949                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2950                            strlencmp(cmd, "dvi_enable") == 0) {
2951                         enable |= TP_ACPI_VIDEO_S_DVI;
2952                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2953                            strlencmp(cmd, "dvi_disable") == 0) {
2954                         disable |= TP_ACPI_VIDEO_S_DVI;
2955                 } else if (strlencmp(cmd, "auto_enable") == 0) {
2956                         res = video_autosw_set(1);
2957                         if (res)
2958                                 return res;
2959                 } else if (strlencmp(cmd, "auto_disable") == 0) {
2960                         res = video_autosw_set(0);
2961                         if (res)
2962                                 return res;
2963                 } else if (strlencmp(cmd, "video_switch") == 0) {
2964                         res = video_outputsw_cycle();
2965                         if (res)
2966                                 return res;
2967                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
2968                         res = video_expand_toggle();
2969                         if (res)
2970                                 return res;
2971                 } else
2972                         return -EINVAL;
2973         }
2974
2975         if (enable || disable) {
2976                 status = video_outputsw_get();
2977                 if (status < 0)
2978                         return status;
2979                 res = video_outputsw_set((status & ~disable) | enable);
2980                 if (res)
2981                         return res;
2982         }
2983
2984         return 0;
2985 }
2986
2987 static struct ibm_struct video_driver_data = {
2988         .name = "video",
2989         .read = video_read,
2990         .write = video_write,
2991         .exit = video_exit,
2992 };
2993
2994 /*************************************************************************
2995  * Light (thinklight) subdriver
2996  */
2997
2998 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
2999 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3000
3001 static int __init light_init(struct ibm_init_struct *iibm)
3002 {
3003         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3004
3005         TPACPI_ACPIHANDLE_INIT(ledb);
3006         TPACPI_ACPIHANDLE_INIT(lght);
3007         TPACPI_ACPIHANDLE_INIT(cmos);
3008
3009         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3010         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3011
3012         if (tp_features.light)
3013                 /* light status not supported on
3014                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3015                 tp_features.light_status =
3016                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3017
3018         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3019                 str_supported(tp_features.light));
3020
3021         return (tp_features.light)? 0 : 1;
3022 }
3023
3024 static int light_read(char *p)
3025 {
3026         int len = 0;
3027         int status = 0;
3028
3029         if (!tp_features.light) {
3030                 len += sprintf(p + len, "status:\t\tnot supported\n");
3031         } else if (!tp_features.light_status) {
3032                 len += sprintf(p + len, "status:\t\tunknown\n");
3033                 len += sprintf(p + len, "commands:\ton, off\n");
3034         } else {
3035                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3036                         return -EIO;
3037                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3038                 len += sprintf(p + len, "commands:\ton, off\n");
3039         }
3040
3041         return len;
3042 }
3043
3044 static int light_write(char *buf)
3045 {
3046         int cmos_cmd, lght_cmd;
3047         char *cmd;
3048         int success;
3049
3050         if (!tp_features.light)
3051                 return -ENODEV;
3052
3053         while ((cmd = next_cmd(&buf))) {
3054                 if (strlencmp(cmd, "on") == 0) {
3055                         cmos_cmd = 0x0c;
3056                         lght_cmd = 1;
3057                 } else if (strlencmp(cmd, "off") == 0) {
3058                         cmos_cmd = 0x0d;
3059                         lght_cmd = 0;
3060                 } else
3061                         return -EINVAL;
3062
3063                 success = cmos_handle ?
3064                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3065                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3066                 if (!success)
3067                         return -EIO;
3068         }
3069
3070         return 0;
3071 }
3072
3073 static struct ibm_struct light_driver_data = {
3074         .name = "light",
3075         .read = light_read,
3076         .write = light_write,
3077 };
3078
3079 /*************************************************************************
3080  * Dock subdriver
3081  */
3082
3083 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3084
3085 static void dock_notify(struct ibm_struct *ibm, u32 event);
3086 static int dock_read(char *p);
3087 static int dock_write(char *buf);
3088
3089 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3090            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3091            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3092            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3093     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3094
3095 /* don't list other alternatives as we install a notify handler on the 570 */
3096 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3097
3098 static const struct acpi_device_id ibm_pci_device_ids[] = {
3099         {PCI_ROOT_HID_STRING, 0},
3100         {"", 0},
3101 };
3102
3103 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3104         {
3105          .notify = dock_notify,
3106          .handle = &dock_handle,
3107          .type = ACPI_SYSTEM_NOTIFY,
3108         },
3109         {
3110         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3111          * We just use it to get notifications of dock hotplug
3112          * in very old thinkpads */
3113          .hid = ibm_pci_device_ids,
3114          .notify = dock_notify,
3115          .handle = &pci_handle,
3116          .type = ACPI_SYSTEM_NOTIFY,
3117         },
3118 };
3119
3120 static struct ibm_struct dock_driver_data[2] = {
3121         {
3122          .name = "dock",
3123          .read = dock_read,
3124          .write = dock_write,
3125          .acpi = &ibm_dock_acpidriver[0],
3126         },
3127         {
3128          .name = "dock",
3129          .acpi = &ibm_dock_acpidriver[1],
3130         },
3131 };
3132
3133 #define dock_docked() (_sta(dock_handle) & 1)
3134
3135 static int __init dock_init(struct ibm_init_struct *iibm)
3136 {
3137         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3138
3139         TPACPI_ACPIHANDLE_INIT(dock);
3140
3141         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3142                 str_supported(dock_handle != NULL));
3143
3144         return (dock_handle)? 0 : 1;
3145 }
3146
3147 static int __init dock_init2(struct ibm_init_struct *iibm)
3148 {
3149         int dock2_needed;
3150
3151         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3152
3153         if (dock_driver_data[0].flags.acpi_driver_registered &&
3154             dock_driver_data[0].flags.acpi_notify_installed) {
3155                 TPACPI_ACPIHANDLE_INIT(pci);
3156                 dock2_needed = (pci_handle != NULL);
3157                 vdbg_printk(TPACPI_DBG_INIT,
3158                             "dock PCI handler for the TP 570 is %s\n",
3159                             str_supported(dock2_needed));
3160         } else {
3161                 vdbg_printk(TPACPI_DBG_INIT,
3162                 "dock subdriver part 2 not required\n");
3163                 dock2_needed = 0;
3164         }
3165
3166         return (dock2_needed)? 0 : 1;
3167 }
3168
3169 static void dock_notify(struct ibm_struct *ibm, u32 event)
3170 {
3171         int docked = dock_docked();
3172         int pci = ibm->acpi->hid && ibm->acpi->device &&
3173                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3174         int data;
3175
3176         if (event == 1 && !pci) /* 570 */
3177                 data = 1;       /* button */
3178         else if (event == 1 && pci)     /* 570 */
3179                 data = 3;       /* dock */
3180         else if (event == 3 && docked)
3181                 data = 1;       /* button */
3182         else if (event == 3 && !docked)
3183                 data = 2;       /* undock */
3184         else if (event == 0 && docked)
3185                 data = 3;       /* dock */
3186         else {
3187                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3188                        event, _sta(dock_handle));
3189                 data = 0;       /* unknown */
3190         }
3191         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3192         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3193                                           ibm->acpi->device->dev.bus_id,
3194                                           event, data);
3195 }
3196
3197 static int dock_read(char *p)
3198 {
3199         int len = 0;
3200         int docked = dock_docked();
3201
3202         if (!dock_handle)
3203                 len += sprintf(p + len, "status:\t\tnot supported\n");
3204         else if (!docked)
3205                 len += sprintf(p + len, "status:\t\tundocked\n");
3206         else {
3207                 len += sprintf(p + len, "status:\t\tdocked\n");
3208                 len += sprintf(p + len, "commands:\tdock, undock\n");
3209         }
3210
3211         return len;
3212 }
3213
3214 static int dock_write(char *buf)
3215 {
3216         char *cmd;
3217
3218         if (!dock_docked())
3219                 return -ENODEV;
3220
3221         while ((cmd = next_cmd(&buf))) {
3222                 if (strlencmp(cmd, "undock") == 0) {
3223                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3224                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3225                                 return -EIO;
3226                 } else if (strlencmp(cmd, "dock") == 0) {
3227                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3228                                 return -EIO;
3229                 } else
3230                         return -EINVAL;
3231         }
3232
3233         return 0;
3234 }
3235
3236 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3237
3238 /*************************************************************************
3239  * Bay subdriver
3240  */
3241
3242 #ifdef CONFIG_THINKPAD_ACPI_BAY
3243
3244 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3245            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3246            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3247            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3248            );                           /* A21e, R30, R31 */
3249 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3250            "_EJ0",              /* all others */
3251            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3252 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3253            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3254            );                           /* all others */
3255 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3256            "_EJ0",                      /* 770x */
3257            );                           /* all others */
3258
3259 static int __init bay_init(struct ibm_init_struct *iibm)
3260 {
3261         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3262
3263         TPACPI_ACPIHANDLE_INIT(bay);
3264         if (bay_handle)
3265                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3266         TPACPI_ACPIHANDLE_INIT(bay2);
3267         if (bay2_handle)
3268                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3269
3270         tp_features.bay_status = bay_handle &&
3271                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3272         tp_features.bay_status2 = bay2_handle &&
3273                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3274
3275         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3276                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3277         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3278                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3279
3280         vdbg_printk(TPACPI_DBG_INIT,
3281                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3282                 str_supported(tp_features.bay_status),
3283                 str_supported(tp_features.bay_eject),
3284                 str_supported(tp_features.bay_status2),
3285                 str_supported(tp_features.bay_eject2));
3286
3287         return (tp_features.bay_status || tp_features.bay_eject ||
3288                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3289 }
3290
3291 static void bay_notify(struct ibm_struct *ibm, u32 event)
3292 {
3293         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3294         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3295                                           ibm->acpi->device->dev.bus_id,
3296                                           event, 0);
3297 }
3298
3299 #define bay_occupied(b) (_sta(b##_handle) & 1)
3300
3301 static int bay_read(char *p)
3302 {
3303         int len = 0;
3304         int occupied = bay_occupied(bay);
3305         int occupied2 = bay_occupied(bay2);
3306         int eject, eject2;
3307
3308         len += sprintf(p + len, "status:\t\t%s\n",
3309                 tp_features.bay_status ?
3310                         (occupied ? "occupied" : "unoccupied") :
3311                                 "not supported");
3312         if (tp_features.bay_status2)
3313                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3314                                "occupied" : "unoccupied");
3315
3316         eject = tp_features.bay_eject && occupied;
3317         eject2 = tp_features.bay_eject2 && occupied2;
3318
3319         if (eject && eject2)
3320                 len += sprintf(p + len, "commands:\teject, eject2\n");
3321         else if (eject)
3322                 len += sprintf(p + len, "commands:\teject\n");
3323         else if (eject2)
3324                 len += sprintf(p + len, "commands:\teject2\n");
3325
3326         return len;
3327 }
3328
3329 static int bay_write(char *buf)
3330 {
3331         char *cmd;
3332
3333         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3334                 return -ENODEV;
3335
3336         while ((cmd = next_cmd(&buf))) {
3337                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3338                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3339                                 return -EIO;
3340                 } else if (tp_features.bay_eject2 &&
3341                            strlencmp(cmd, "eject2") == 0) {
3342                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3343                                 return -EIO;
3344                 } else
3345                         return -EINVAL;
3346         }
3347
3348         return 0;
3349 }
3350
3351 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3352         .notify = bay_notify,
3353         .handle = &bay_handle,
3354         .type = ACPI_SYSTEM_NOTIFY,
3355 };
3356
3357 static struct ibm_struct bay_driver_data = {
3358         .name = "bay",
3359         .read = bay_read,
3360         .write = bay_write,
3361         .acpi = &ibm_bay_acpidriver,
3362 };
3363
3364 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3365
3366 /*************************************************************************
3367  * CMOS subdriver
3368  */
3369
3370 /* sysfs cmos_command -------------------------------------------------- */
3371 static ssize_t cmos_command_store(struct device *dev,
3372                             struct device_attribute *attr,
3373                             const char *buf, size_t count)
3374 {
3375         unsigned long cmos_cmd;
3376         int res;
3377
3378         if (parse_strtoul(buf, 21, &cmos_cmd))
3379                 return -EINVAL;
3380
3381         res = issue_thinkpad_cmos_command(cmos_cmd);
3382         return (res)? res : count;
3383 }
3384
3385 static struct device_attribute dev_attr_cmos_command =
3386         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3387
3388 /* --------------------------------------------------------------------- */
3389
3390 static int __init cmos_init(struct ibm_init_struct *iibm)
3391 {
3392         int res;
3393
3394         vdbg_printk(TPACPI_DBG_INIT,
3395                 "initializing cmos commands subdriver\n");
3396
3397         TPACPI_ACPIHANDLE_INIT(cmos);
3398
3399         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3400                 str_supported(cmos_handle != NULL));
3401
3402         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3403         if (res)
3404                 return res;
3405
3406         return (cmos_handle)? 0 : 1;
3407 }
3408
3409 static void cmos_exit(void)
3410 {
3411         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3412 }
3413
3414 static int cmos_read(char *p)
3415 {
3416         int len = 0;
3417
3418         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3419            R30, R31, T20-22, X20-21 */
3420         if (!cmos_handle)
3421                 len += sprintf(p + len, "status:\t\tnot supported\n");
3422         else {
3423                 len += sprintf(p + len, "status:\t\tsupported\n");
3424                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3425         }
3426
3427         return len;
3428 }
3429
3430 static int cmos_write(char *buf)
3431 {
3432         char *cmd;
3433         int cmos_cmd, res;
3434
3435         while ((cmd = next_cmd(&buf))) {
3436                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3437                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3438                         /* cmos_cmd set */
3439                 } else
3440                         return -EINVAL;
3441
3442                 res = issue_thinkpad_cmos_command(cmos_cmd);
3443                 if (res)
3444                         return res;
3445         }
3446
3447         return 0;
3448 }
3449
3450 static struct ibm_struct cmos_driver_data = {
3451         .name = "cmos",
3452         .read = cmos_read,
3453         .write = cmos_write,
3454         .exit = cmos_exit,
3455 };
3456
3457 /*************************************************************************
3458  * LED subdriver
3459  */
3460
3461 enum led_access_mode {
3462         TPACPI_LED_NONE = 0,
3463         TPACPI_LED_570, /* 570 */
3464         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3465         TPACPI_LED_NEW, /* all others */
3466 };
3467
3468 enum {  /* For TPACPI_LED_OLD */
3469         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3470         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3471         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3472 };
3473
3474 static enum led_access_mode led_supported;
3475
3476 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3477            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3478                                 /* T20-22, X20-21 */
3479            "LED",               /* all others */
3480            );                   /* R30, R31 */
3481
3482 static int __init led_init(struct ibm_init_struct *iibm)
3483 {
3484         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3485
3486         TPACPI_ACPIHANDLE_INIT(led);
3487
3488         if (!led_handle)
3489                 /* led not supported on R30, R31 */
3490                 led_supported = TPACPI_LED_NONE;
3491         else if (strlencmp(led_path, "SLED") == 0)
3492                 /* 570 */
3493                 led_supported = TPACPI_LED_570;
3494         else if (strlencmp(led_path, "SYSL") == 0)
3495                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3496                 led_supported = TPACPI_LED_OLD;
3497         else
3498                 /* all others */
3499                 led_supported = TPACPI_LED_NEW;
3500
3501         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3502                 str_supported(led_supported), led_supported);
3503
3504         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3505 }
3506
3507 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3508
3509 static int led_read(char *p)
3510 {
3511         int len = 0;
3512
3513         if (!led_supported) {
3514                 len += sprintf(p + len, "status:\t\tnot supported\n");
3515                 return len;
3516         }
3517         len += sprintf(p + len, "status:\t\tsupported\n");
3518
3519         if (led_supported == TPACPI_LED_570) {
3520                 /* 570 */
3521                 int i, status;
3522                 for (i = 0; i < 8; i++) {
3523                         if (!acpi_evalf(ec_handle,
3524                                         &status, "GLED", "dd", 1 << i))
3525                                 return -EIO;
3526                         len += sprintf(p + len, "%d:\t\t%s\n",
3527                                        i, led_status(status));
3528                 }
3529         }
3530
3531         len += sprintf(p + len, "commands:\t"
3532                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3533
3534         return len;
3535 }
3536
3537 /* off, on, blink */
3538 static const int led_sled_arg1[] = { 0, 1, 3 };
3539 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
3540 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
3541 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3542
3543 static int led_write(char *buf)
3544 {
3545         char *cmd;
3546         int led, ind, ret;
3547
3548         if (!led_supported)
3549                 return -ENODEV;
3550
3551         while ((cmd = next_cmd(&buf))) {
3552                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3553                         return -EINVAL;
3554
3555                 if (strstr(cmd, "off")) {
3556                         ind = 0;
3557                 } else if (strstr(cmd, "on")) {
3558                         ind = 1;
3559                 } else if (strstr(cmd, "blink")) {
3560                         ind = 2;
3561                 } else
3562                         return -EINVAL;
3563
3564                 if (led_supported == TPACPI_LED_570) {
3565                         /* 570 */
3566                         led = 1 << led;
3567                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3568                                         led, led_sled_arg1[ind]))
3569                                 return -EIO;
3570                 } else if (led_supported == TPACPI_LED_OLD) {
3571                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3572                         led = 1 << led;
3573                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
3574                         if (ret >= 0)
3575                                 ret = ec_write(TPACPI_LED_EC_HLBL,
3576                                                 led * led_exp_hlbl[ind]);
3577                         if (ret >= 0)
3578                                 ret = ec_write(TPACPI_LED_EC_HLCL,
3579                                                 led * led_exp_hlcl[ind]);
3580                         if (ret < 0)
3581                                 return ret;
3582                 } else {
3583                         /* all others */
3584                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3585                                         led, led_led_arg1[ind]))
3586                                 return -EIO;
3587                 }
3588         }
3589
3590         return 0;
3591 }
3592
3593 static struct ibm_struct led_driver_data = {
3594         .name = "led",
3595         .read = led_read,
3596         .write = led_write,
3597 };
3598
3599 /*************************************************************************
3600  * Beep subdriver
3601  */
3602
3603 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
3604
3605 static int __init beep_init(struct ibm_init_struct *iibm)
3606 {
3607         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3608
3609         TPACPI_ACPIHANDLE_INIT(beep);
3610
3611         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3612                 str_supported(beep_handle != NULL));
3613
3614         return (beep_handle)? 0 : 1;
3615 }
3616
3617 static int beep_read(char *p)
3618 {
3619         int len = 0;
3620
3621         if (!beep_handle)
3622                 len += sprintf(p + len, "status:\t\tnot supported\n");
3623         else {
3624                 len += sprintf(p + len, "status:\t\tsupported\n");
3625                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3626         }
3627
3628         return len;
3629 }
3630
3631 static int beep_write(char *buf)
3632 {
3633         char *cmd;
3634         int beep_cmd;
3635
3636         if (!beep_handle)
3637                 return -ENODEV;
3638
3639         while ((cmd = next_cmd(&buf))) {
3640                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3641                     beep_cmd >= 0 && beep_cmd <= 17) {
3642                         /* beep_cmd set */
3643                 } else
3644                         return -EINVAL;
3645                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3646                         return -EIO;
3647         }
3648
3649         return 0;
3650 }
3651
3652 static struct ibm_struct beep_driver_data = {
3653         .name = "beep",
3654         .read = beep_read,
3655         .write = beep_write,
3656 };
3657
3658 /*************************************************************************
3659  * Thermal subdriver
3660  */
3661
3662 enum thermal_access_mode {
3663         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
3664         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
3665         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
3666         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
3667         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
3668 };
3669
3670 enum { /* TPACPI_THERMAL_TPEC_* */
3671         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
3672         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
3673         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
3674 };
3675
3676 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
3677 struct ibm_thermal_sensors_struct {
3678         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3679 };
3680
3681 static enum thermal_access_mode thermal_read_mode;
3682
3683 /* idx is zero-based */
3684 static int thermal_get_sensor(int idx, s32 *value)
3685 {
3686         int t;
3687         s8 tmp;
3688         char tmpi[5];
3689
3690         t = TP_EC_THERMAL_TMP0;
3691
3692         switch (thermal_read_mode) {
3693 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3694         case TPACPI_THERMAL_TPEC_16:
3695                 if (idx >= 8 && idx <= 15) {
3696                         t = TP_EC_THERMAL_TMP8;
3697                         idx -= 8;
3698                 }
3699                 /* fallthrough */
3700 #endif
3701         case TPACPI_THERMAL_TPEC_8:
3702                 if (idx <= 7) {
3703                         if (!acpi_ec_read(t + idx, &tmp))
3704                                 return -EIO;
3705                         *value = tmp * 1000;
3706                         return 0;
3707                 }
3708                 break;
3709
3710         case TPACPI_THERMAL_ACPI_UPDT:
3711                 if (idx <= 7) {
3712                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3713                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3714                                 return -EIO;
3715                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3716                                 return -EIO;
3717                         *value = (t - 2732) * 100;
3718                         return 0;
3719                 }
3720                 break;
3721
3722         case TPACPI_THERMAL_ACPI_TMP07:
3723                 if (idx <= 7) {
3724                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3725                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3726                                 return -EIO;
3727                         if (t > 127 || t < -127)
3728                                 t = TP_EC_THERMAL_TMP_NA;
3729                         *value = t * 1000;
3730                         return 0;
3731                 }
3732                 break;
3733
3734         case TPACPI_THERMAL_NONE:
3735         default:
3736                 return -ENOSYS;
3737         }
3738
3739         return -EINVAL;
3740 }
3741
3742 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3743 {
3744         int res, i;
3745         int n;
3746
3747         n = 8;
3748         i = 0;
3749
3750         if (!s)
3751                 return -EINVAL;
3752
3753         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3754                 n = 16;
3755
3756         for (i = 0 ; i < n; i++) {
3757                 res = thermal_get_sensor(i, &s->temp[i]);
3758                 if (res)
3759                         return res;
3760         }
3761
3762         return n;
3763 }
3764
3765 /* sysfs temp##_input -------------------------------------------------- */
3766
3767 static ssize_t thermal_temp_input_show(struct device *dev,
3768                            struct device_attribute *attr,
3769                            char *buf)
3770 {
3771         struct sensor_device_attribute *sensor_attr =
3772                                         to_sensor_dev_attr(attr);
3773         int idx = sensor_attr->index;
3774         s32 value;
3775         int res;
3776
3777         res = thermal_get_sensor(idx, &value);
3778         if (res)
3779                 return res;
3780         if (value == TP_EC_THERMAL_TMP_NA * 1000)
3781                 return -ENXIO;
3782
3783         return snprintf(buf, PAGE_SIZE, "%d\n", value);
3784 }
3785
3786 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
3787          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
3788                      thermal_temp_input_show, NULL, _idxB)
3789
3790 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
3791         THERMAL_SENSOR_ATTR_TEMP(1, 0),
3792         THERMAL_SENSOR_ATTR_TEMP(2, 1),
3793         THERMAL_SENSOR_ATTR_TEMP(3, 2),
3794         THERMAL_SENSOR_ATTR_TEMP(4, 3),
3795         THERMAL_SENSOR_ATTR_TEMP(5, 4),
3796         THERMAL_SENSOR_ATTR_TEMP(6, 5),
3797         THERMAL_SENSOR_ATTR_TEMP(7, 6),
3798         THERMAL_SENSOR_ATTR_TEMP(8, 7),
3799         THERMAL_SENSOR_ATTR_TEMP(9, 8),
3800         THERMAL_SENSOR_ATTR_TEMP(10, 9),
3801         THERMAL_SENSOR_ATTR_TEMP(11, 10),
3802         THERMAL_SENSOR_ATTR_TEMP(12, 11),
3803         THERMAL_SENSOR_ATTR_TEMP(13, 12),
3804         THERMAL_SENSOR_ATTR_TEMP(14, 13),
3805         THERMAL_SENSOR_ATTR_TEMP(15, 14),
3806         THERMAL_SENSOR_ATTR_TEMP(16, 15),
3807 };
3808
3809 #define THERMAL_ATTRS(X) \
3810         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
3811
3812 static struct attribute *thermal_temp_input_attr[] = {
3813         THERMAL_ATTRS(8),
3814         THERMAL_ATTRS(9),
3815         THERMAL_ATTRS(10),
3816         THERMAL_ATTRS(11),
3817         THERMAL_ATTRS(12),
3818         THERMAL_ATTRS(13),
3819         THERMAL_ATTRS(14),
3820         THERMAL_ATTRS(15),
3821         THERMAL_ATTRS(0),
3822         THERMAL_ATTRS(1),
3823         THERMAL_ATTRS(2),
3824         THERMAL_ATTRS(3),
3825         THERMAL_ATTRS(4),
3826         THERMAL_ATTRS(5),
3827         THERMAL_ATTRS(6),
3828         THERMAL_ATTRS(7),
3829         NULL
3830 };
3831
3832 static const struct attribute_group thermal_temp_input16_group = {
3833         .attrs = thermal_temp_input_attr
3834 };
3835
3836 static const struct attribute_group thermal_temp_input8_group = {
3837         .attrs = &thermal_temp_input_attr[8]
3838 };
3839
3840 #undef THERMAL_SENSOR_ATTR_TEMP
3841 #undef THERMAL_ATTRS
3842
3843 /* --------------------------------------------------------------------- */
3844
3845 static int __init thermal_init(struct ibm_init_struct *iibm)
3846 {
3847         u8 t, ta1, ta2;
3848         int i;
3849         int acpi_tmp7;
3850         int res;
3851
3852         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
3853
3854         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
3855
3856         if (thinkpad_id.ec_model) {
3857                 /*
3858                  * Direct EC access mode: sensors at registers
3859                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
3860                  * non-implemented, thermal sensors return 0x80 when
3861                  * not available
3862                  */
3863
3864                 ta1 = ta2 = 0;
3865                 for (i = 0; i < 8; i++) {
3866                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
3867                                 ta1 |= t;
3868                         } else {
3869                                 ta1 = 0;
3870                                 break;
3871                         }
3872                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
3873                                 ta2 |= t;
3874                         } else {
3875                                 ta1 = 0;
3876                                 break;
3877                         }
3878                 }
3879                 if (ta1 == 0) {
3880                         /* This is sheer paranoia, but we handle it anyway */
3881                         if (acpi_tmp7) {
3882                                 printk(TPACPI_ERR
3883                                        "ThinkPad ACPI EC access misbehaving, "
3884                                        "falling back to ACPI TMPx access "
3885                                        "mode\n");
3886                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3887                         } else {
3888                                 printk(TPACPI_ERR
3889                                        "ThinkPad ACPI EC access misbehaving, "
3890                                        "disabling thermal sensors access\n");
3891                                 thermal_read_mode = TPACPI_THERMAL_NONE;
3892                         }
3893                 } else {
3894                         thermal_read_mode =
3895                             (ta2 != 0) ?
3896                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
3897                 }
3898         } else if (acpi_tmp7) {
3899                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
3900                         /* 600e/x, 770e, 770x */
3901                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
3902                 } else {
3903                         /* Standard ACPI TMPx access, max 8 sensors */
3904                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3905                 }
3906         } else {
3907                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
3908                 thermal_read_mode = TPACPI_THERMAL_NONE;
3909         }
3910
3911         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
3912                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
3913                 thermal_read_mode);
3914
3915         switch (thermal_read_mode) {
3916         case TPACPI_THERMAL_TPEC_16:
3917                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3918                                 &thermal_temp_input16_group);
3919                 if (res)
3920                         return res;
3921                 break;
3922         case TPACPI_THERMAL_TPEC_8:
3923         case TPACPI_THERMAL_ACPI_TMP07:
3924         case TPACPI_THERMAL_ACPI_UPDT:
3925                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3926                                 &thermal_temp_input8_group);
3927                 if (res)
3928                         return res;
3929                 break;
3930         case TPACPI_THERMAL_NONE:
3931         default:
3932                 return 1;
3933         }
3934
3935         return 0;
3936 }
3937
3938 static void thermal_exit(void)
3939 {
3940         switch (thermal_read_mode) {
3941         case TPACPI_THERMAL_TPEC_16:
3942                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3943                                    &thermal_temp_input16_group);
3944                 break;
3945         case TPACPI_THERMAL_TPEC_8:
3946         case TPACPI_THERMAL_ACPI_TMP07:
3947         case TPACPI_THERMAL_ACPI_UPDT:
3948                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3949                                    &thermal_temp_input16_group);
3950                 break;
3951         case TPACPI_THERMAL_NONE:
3952         default:
3953                 break;
3954         }
3955 }
3956
3957 static int thermal_read(char *p)
3958 {
3959         int len = 0;
3960         int n, i;
3961         struct ibm_thermal_sensors_struct t;
3962
3963         n = thermal_get_sensors(&t);
3964         if (unlikely(n < 0))
3965                 return n;
3966
3967         len += sprintf(p + len, "temperatures:\t");
3968
3969         if (n > 0) {
3970                 for (i = 0; i < (n - 1); i++)
3971                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
3972                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
3973         } else
3974                 len += sprintf(p + len, "not supported\n");
3975
3976         return len;
3977 }
3978
3979 static struct ibm_struct thermal_driver_data = {
3980         .name = "thermal",
3981         .read = thermal_read,
3982         .exit = thermal_exit,
3983 };
3984
3985 /*************************************************************************
3986  * EC Dump subdriver
3987  */
3988
3989 static u8 ecdump_regs[256];
3990
3991 static int ecdump_read(char *p)
3992 {
3993         int len = 0;
3994         int i, j;
3995         u8 v;
3996
3997         len += sprintf(p + len, "EC      "
3998                        " +00 +01 +02 +03 +04 +05 +06 +07"
3999                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4000         for (i = 0; i < 256; i += 16) {
4001                 len += sprintf(p + len, "EC 0x%02x:", i);
4002                 for (j = 0; j < 16; j++) {
4003                         if (!acpi_ec_read(i + j, &v))
4004                                 break;
4005                         if (v != ecdump_regs[i + j])
4006                                 len += sprintf(p + len, " *%02x", v);
4007                         else
4008                                 len += sprintf(p + len, "  %02x", v);
4009                         ecdump_regs[i + j] = v;
4010                 }
4011                 len += sprintf(p + len, "\n");
4012                 if (j != 16)
4013                         break;
4014         }
4015
4016         /* These are way too dangerous to advertise openly... */
4017 #if 0
4018         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4019                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4020         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4021                        " (<offset> is 00-ff, <value> is 0-255)\n");
4022 #endif
4023         return len;
4024 }
4025
4026 static int ecdump_write(char *buf)
4027 {
4028         char *cmd;
4029         int i, v;
4030
4031         while ((cmd = next_cmd(&buf))) {
4032                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4033                         /* i and v set */
4034                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4035                         /* i and v set */
4036                 } else
4037                         return -EINVAL;
4038                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4039                         if (!acpi_ec_write(i, v))
4040                                 return -EIO;
4041                 } else
4042                         return -EINVAL;
4043         }
4044
4045         return 0;
4046 }
4047
4048 static struct ibm_struct ecdump_driver_data = {
4049         .name = "ecdump",
4050         .read = ecdump_read,
4051         .write = ecdump_write,
4052         .flags.experimental = 1,
4053 };
4054
4055 /*************************************************************************
4056  * Backlight/brightness subdriver
4057  */
4058
4059 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4060
4061 static struct backlight_device *ibm_backlight_device;
4062 static int brightness_offset = 0x31;
4063 static int brightness_mode;
4064 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4065
4066 static struct mutex brightness_mutex;
4067
4068 /*
4069  * ThinkPads can read brightness from two places: EC 0x31, or
4070  * CMOS NVRAM byte 0x5E, bits 0-3.
4071  */
4072 static int brightness_get(struct backlight_device *bd)
4073 {
4074         u8 lec = 0, lcmos = 0, level = 0;
4075
4076         if (brightness_mode & 1) {
4077                 if (!acpi_ec_read(brightness_offset, &lec))
4078                         return -EIO;
4079                 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4080                 level = lec;
4081         };
4082         if (brightness_mode & 2) {
4083                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4084                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4085                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4086                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4087                 level = lcmos;
4088         }
4089
4090         if (brightness_mode == 3 && lec != lcmos) {
4091                 printk(TPACPI_ERR
4092                         "CMOS NVRAM (%u) and EC (%u) do not agree "
4093                         "on display brightness level\n",
4094                         (unsigned int) lcmos,
4095                         (unsigned int) lec);
4096                 return -EIO;
4097         }
4098
4099         return level;
4100 }
4101
4102 /* May return EINTR which can always be mapped to ERESTARTSYS */
4103 static int brightness_set(int value)
4104 {
4105         int cmos_cmd, inc, i, res;
4106         int current_value;
4107
4108         if (value > ((tp_features.bright_16levels)? 15 : 7))
4109                 return -EINVAL;
4110
4111         res = mutex_lock_interruptible(&brightness_mutex);
4112         if (res < 0)
4113                 return res;
4114
4115         current_value = brightness_get(NULL);
4116         if (current_value < 0) {
4117                 res = current_value;
4118                 goto errout;
4119         }
4120
4121         cmos_cmd = value > current_value ?
4122                         TP_CMOS_BRIGHTNESS_UP :
4123                         TP_CMOS_BRIGHTNESS_DOWN;
4124         inc = (value > current_value)? 1 : -1;
4125
4126         res = 0;
4127         for (i = current_value; i != value; i += inc) {
4128                 if ((brightness_mode & 2) &&
4129                     issue_thinkpad_cmos_command(cmos_cmd)) {
4130                         res = -EIO;
4131                         goto errout;
4132                 }
4133                 if ((brightness_mode & 1) &&
4134                     !acpi_ec_write(brightness_offset, i + inc)) {
4135                         res = -EIO;
4136                         goto errout;;
4137                 }
4138         }
4139
4140 errout:
4141         mutex_unlock(&brightness_mutex);
4142         return res;
4143 }
4144
4145 /* sysfs backlight class ----------------------------------------------- */
4146
4147 static int brightness_update_status(struct backlight_device *bd)
4148 {
4149         /* it is the backlight class's job (caller) to handle
4150          * EINTR and other errors properly */
4151         return brightness_set(
4152                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4153                  bd->props.power == FB_BLANK_UNBLANK) ?
4154                                 bd->props.brightness : 0);
4155 }
4156
4157 static struct backlight_ops ibm_backlight_data = {
4158         .get_brightness = brightness_get,
4159         .update_status  = brightness_update_status,
4160 };
4161
4162 /* --------------------------------------------------------------------- */
4163
4164 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
4165 {
4166         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
4167         union acpi_object *obj;
4168         int rc;
4169
4170         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
4171                 obj = (union acpi_object *)buffer.pointer;
4172                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
4173                         printk(TPACPI_ERR "Unknown BCLL data, "
4174                                "please report this to %s\n", TPACPI_MAIL);
4175                         rc = 0;
4176                 } else {
4177                         rc = obj->package.count;
4178                 }
4179         } else {
4180                 return 0;
4181         }
4182
4183         kfree(buffer.pointer);
4184         return rc;
4185 }
4186
4187 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
4188                                         void *context, void **rv)
4189 {
4190         char name[ACPI_PATH_SEGMENT_LENGTH];
4191         struct acpi_buffer buffer = { sizeof(name), &name };
4192
4193         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4194             !strncmp("BCLL", name, sizeof(name) - 1)) {
4195                 if (tpacpi_query_bcll_levels(handle) == 16) {
4196                         *rv = handle;
4197                         return AE_CTRL_TERMINATE;
4198                 } else {
4199                         return AE_OK;
4200                 }
4201         } else {
4202                 return AE_OK;
4203         }
4204 }
4205
4206 static int __init brightness_check_levels(void)
4207 {
4208         int status;
4209         void *found_node = NULL;
4210
4211         if (!vid_handle) {
4212                 TPACPI_ACPIHANDLE_INIT(vid);
4213         }
4214         if (!vid_handle)
4215                 return 0;
4216
4217         /* Search for a BCLL package with 16 levels */
4218         status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
4219                                         brightness_find_bcll, NULL,
4220                                         &found_node);
4221
4222         return (ACPI_SUCCESS(status) && found_node != NULL);
4223 }
4224
4225 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
4226                                         void *context, void **rv)
4227 {
4228         char name[ACPI_PATH_SEGMENT_LENGTH];
4229         struct acpi_buffer buffer = { sizeof(name), &name };
4230
4231         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4232             !strncmp("_BCL", name, sizeof(name) - 1)) {
4233                 *rv = handle;
4234                 return AE_CTRL_TERMINATE;
4235         } else {
4236                 return AE_OK;
4237         }
4238 }
4239
4240 static int __init brightness_check_std_acpi_support(void)
4241 {
4242         int status;
4243         void *found_node = NULL;
4244
4245         if (!vid_handle) {
4246                 TPACPI_ACPIHANDLE_INIT(vid);
4247         }
4248         if (!vid_handle)
4249                 return 0;
4250
4251         /* Search for a _BCL method, but don't execute it */
4252         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
4253                                      brightness_find_bcl, NULL, &found_node);
4254
4255         return (ACPI_SUCCESS(status) && found_node != NULL);
4256 }
4257
4258 static int __init brightness_init(struct ibm_init_struct *iibm)
4259 {
4260         int b;
4261
4262         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4263
4264         mutex_init(&brightness_mutex);
4265
4266         if (!brightness_enable) {
4267                 dbg_printk(TPACPI_DBG_INIT,
4268                            "brightness support disabled by "
4269                            "module parameter\n");
4270                 return 1;
4271         } else if (brightness_enable > 1) {
4272                 if (brightness_check_std_acpi_support()) {
4273                         printk(TPACPI_NOTICE
4274                                "standard ACPI backlight interface "
4275                                "available, not loading native one...\n");
4276                         return 1;
4277                 }
4278         }
4279
4280         if (!brightness_mode) {
4281                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4282                         brightness_mode = 2;
4283                 else
4284                         brightness_mode = 3;
4285
4286                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4287                         brightness_mode);
4288         }
4289
4290         if (brightness_mode > 3)
4291                 return -EINVAL;
4292
4293         tp_features.bright_16levels =
4294                         thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
4295                         brightness_check_levels();
4296
4297         b = brightness_get(NULL);
4298         if (b < 0)
4299                 return 1;
4300
4301         if (tp_features.bright_16levels)
4302                 printk(TPACPI_INFO
4303                        "detected a 16-level brightness capable ThinkPad\n");
4304
4305         ibm_backlight_device = backlight_device_register(
4306                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4307                                         &ibm_backlight_data);
4308         if (IS_ERR(ibm_backlight_device)) {
4309                 printk(TPACPI_ERR "Could not register backlight device\n");
4310                 return PTR_ERR(ibm_backlight_device);
4311         }
4312         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4313
4314         ibm_backlight_device->props.max_brightness =
4315                                 (tp_features.bright_16levels)? 15 : 7;
4316         ibm_backlight_device->props.brightness = b;
4317         backlight_update_status(ibm_backlight_device);
4318
4319         return 0;
4320 }
4321
4322 static void brightness_exit(void)
4323 {
4324         if (ibm_backlight_device) {
4325                 vdbg_printk(TPACPI_DBG_EXIT,
4326                             "calling backlight_device_unregister()\n");
4327                 backlight_device_unregister(ibm_backlight_device);
4328                 ibm_backlight_device = NULL;
4329         }
4330 }
4331
4332 static int brightness_read(char *p)
4333 {
4334         int len = 0;
4335         int level;
4336
4337         level = brightness_get(NULL);
4338         if (level < 0) {
4339                 len += sprintf(p + len, "level:\t\tunreadable\n");
4340         } else {
4341                 len += sprintf(p + len, "level:\t\t%d\n", level);
4342                 len += sprintf(p + len, "commands:\tup, down\n");
4343                 len += sprintf(p + len, "commands:\tlevel <level>"
4344                                " (<level> is 0-%d)\n",
4345                                (tp_features.bright_16levels) ? 15 : 7);
4346         }
4347
4348         return len;
4349 }
4350
4351 static int brightness_write(char *buf)
4352 {
4353         int level;
4354         int rc;
4355         char *cmd;
4356         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4357
4358         level = brightness_get(NULL);
4359         if (level < 0)
4360                 return level;
4361
4362         while ((cmd = next_cmd(&buf))) {
4363                 if (strlencmp(cmd, "up") == 0) {
4364                         if (level < max_level)
4365                                 level++;
4366                 } else if (strlencmp(cmd, "down") == 0) {
4367                         if (level > 0)
4368                                 level--;
4369                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4370                            level >= 0 && level <= max_level) {
4371                         /* new level set */
4372                 } else
4373                         return -EINVAL;
4374         }
4375
4376         /*
4377          * Now we know what the final level should be, so we try to set it.
4378          * Doing it this way makes the syscall restartable in case of EINTR
4379          */
4380         rc = brightness_set(level);
4381         return (rc == -EINTR)? ERESTARTSYS : rc;
4382 }
4383
4384 static struct ibm_struct brightness_driver_data = {
4385         .name = "brightness",
4386         .read = brightness_read,
4387         .write = brightness_write,
4388         .exit = brightness_exit,
4389 };
4390
4391 /*************************************************************************
4392  * Volume subdriver
4393  */
4394
4395 static int volume_offset = 0x30;
4396
4397 static int volume_read(char *p)
4398 {
4399         int len = 0;
4400         u8 level;
4401
4402         if (!acpi_ec_read(volume_offset, &level)) {
4403                 len += sprintf(p + len, "level:\t\tunreadable\n");
4404         } else {
4405                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4406                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4407                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4408                 len += sprintf(p + len, "commands:\tlevel <level>"
4409                                " (<level> is 0-15)\n");
4410         }
4411
4412         return len;
4413 }
4414
4415 static int volume_write(char *buf)
4416 {
4417         int cmos_cmd, inc, i;
4418         u8 level, mute;
4419         int new_level, new_mute;
4420         char *cmd;
4421
4422         while ((cmd = next_cmd(&buf))) {
4423                 if (!acpi_ec_read(volume_offset, &level))
4424                         return -EIO;
4425                 new_mute = mute = level & 0x40;
4426                 new_level = level = level & 0xf;
4427
4428                 if (strlencmp(cmd, "up") == 0) {
4429                         if (mute)
4430                                 new_mute = 0;
4431                         else
4432                                 new_level = level == 15 ? 15 : level + 1;
4433                 } else if (strlencmp(cmd, "down") == 0) {
4434                         if (mute)
4435                                 new_mute = 0;
4436                         else
4437                                 new_level = level == 0 ? 0 : level - 1;
4438                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4439                            new_level >= 0 && new_level <= 15) {
4440                         /* new_level set */
4441                 } else if (strlencmp(cmd, "mute") == 0) {
4442                         new_mute = 0x40;
4443                 } else
4444                         return -EINVAL;
4445
4446                 if (new_level != level) {
4447                         /* mute doesn't change */
4448
4449                         cmos_cmd = (new_level > level) ?
4450                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4451                         inc = new_level > level ? 1 : -1;
4452
4453                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4454                                      !acpi_ec_write(volume_offset, level)))
4455                                 return -EIO;
4456
4457                         for (i = level; i != new_level; i += inc)
4458                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4459                                     !acpi_ec_write(volume_offset, i + inc))
4460                                         return -EIO;
4461
4462                         if (mute &&
4463                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4464                              !acpi_ec_write(volume_offset, new_level + mute))) {
4465                                 return -EIO;
4466                         }
4467                 }
4468
4469                 if (new_mute != mute) {
4470                         /* level doesn't change */
4471
4472                         cmos_cmd = (new_mute) ?
4473                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4474
4475                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4476                             !acpi_ec_write(volume_offset, level + new_mute))
4477                                 return -EIO;
4478                 }
4479         }
4480
4481         return 0;
4482 }
4483
4484 static struct ibm_struct volume_driver_data = {
4485         .name = "volume",
4486         .read = volume_read,
4487         .write = volume_write,
4488 };
4489
4490 /*************************************************************************
4491  * Fan subdriver
4492  */
4493
4494 /*
4495  * FAN ACCESS MODES
4496  *
4497  * TPACPI_FAN_RD_ACPI_GFAN:
4498  *      ACPI GFAN method: returns fan level
4499  *
4500  *      see TPACPI_FAN_WR_ACPI_SFAN
4501  *      EC 0x2f (HFSP) not available if GFAN exists
4502  *
4503  * TPACPI_FAN_WR_ACPI_SFAN:
4504  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4505  *
4506  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4507  *      it for writing.
4508  *
4509  * TPACPI_FAN_WR_TPEC:
4510  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4511  *      Supported on almost all ThinkPads
4512  *
4513  *      Fan speed changes of any sort (including those caused by the
4514  *      disengaged mode) are usually done slowly by the firmware as the
4515  *      maximum ammount of fan duty cycle change per second seems to be
4516  *      limited.
4517  *
4518  *      Reading is not available if GFAN exists.
4519  *      Writing is not available if SFAN exists.
4520  *
4521  *      Bits
4522  *       7      automatic mode engaged;
4523  *              (default operation mode of the ThinkPad)
4524  *              fan level is ignored in this mode.
4525  *       6      full speed mode (takes precedence over bit 7);
4526  *              not available on all thinkpads.  May disable
4527  *              the tachometer while the fan controller ramps up
4528  *              the speed (which can take up to a few *minutes*).
4529  *              Speeds up fan to 100% duty-cycle, which is far above
4530  *              the standard RPM levels.  It is not impossible that
4531  *              it could cause hardware damage.
4532  *      5-3     unused in some models.  Extra bits for fan level
4533  *              in others, but still useless as all values above
4534  *              7 map to the same speed as level 7 in these models.
4535  *      2-0     fan level (0..7 usually)
4536  *                      0x00 = stop
4537  *                      0x07 = max (set when temperatures critical)
4538  *              Some ThinkPads may have other levels, see
4539  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4540  *
4541  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4542  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4543  *      does so, its initial value is meaningless (0x07).
4544  *
4545  *      For firmware bugs, refer to:
4546  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4547  *
4548  *      ----
4549  *
4550  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4551  *      Main fan tachometer reading (in RPM)
4552  *
4553  *      This register is present on all ThinkPads with a new-style EC, and
4554  *      it is known not to be present on the A21m/e, and T22, as there is
4555  *      something else in offset 0x84 according to the ACPI DSDT.  Other
4556  *      ThinkPads from this same time period (and earlier) probably lack the
4557  *      tachometer as well.
4558  *
4559  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4560  *      was never fixed by IBM to report the EC firmware version string
4561  *      probably support the tachometer (like the early X models), so
4562  *      detecting it is quite hard.  We need more data to know for sure.
4563  *
4564  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4565  *      might result.
4566  *
4567  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
4568  *      mode.
4569  *
4570  *      For firmware bugs, refer to:
4571  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4572  *
4573  * TPACPI_FAN_WR_ACPI_FANS:
4574  *      ThinkPad X31, X40, X41.  Not available in the X60.
4575  *
4576  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
4577  *      high speed.  ACPI DSDT seems to map these three speeds to levels
4578  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4579  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4580  *
4581  *      The speeds are stored on handles
4582  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4583  *
4584  *      There are three default speed sets, acessible as handles:
4585  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4586  *
4587  *      ACPI DSDT switches which set is in use depending on various
4588  *      factors.
4589  *
4590  *      TPACPI_FAN_WR_TPEC is also available and should be used to
4591  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
4592  *      but the ACPI tables just mention level 7.
4593  */
4594
4595 enum {                                  /* Fan control constants */
4596         fan_status_offset = 0x2f,       /* EC register 0x2f */
4597         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
4598                                          * 0x84 must be read before 0x85 */
4599
4600         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
4601         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
4602
4603         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
4604 };
4605
4606 enum fan_status_access_mode {
4607         TPACPI_FAN_NONE = 0,            /* No fan status or control */
4608         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
4609         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4610 };
4611
4612 enum fan_control_access_mode {
4613         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
4614         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
4615         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
4616         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
4617 };
4618
4619 enum fan_control_commands {
4620         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
4621         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
4622         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
4623                                                  * and also watchdog cmd */
4624 };
4625
4626 static int fan_control_allowed;
4627
4628 static enum fan_status_access_mode fan_status_access_mode;
4629 static enum fan_control_access_mode fan_control_access_mode;
4630 static enum fan_control_commands fan_control_commands;
4631
4632 static u8 fan_control_initial_status;
4633 static u8 fan_control_desired_level;
4634 static int fan_watchdog_maxinterval;
4635
4636 static struct mutex fan_mutex;
4637
4638 static void fan_watchdog_fire(struct work_struct *ignored);
4639 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4640
4641 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
4642 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4643            "\\FSPD",            /* 600e/x, 770e, 770x */
4644            );                   /* all others */
4645 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4646            "JFNS",              /* 770x-JL */
4647            );                   /* all others */
4648
4649 /*
4650  * Call with fan_mutex held
4651  */
4652 static void fan_update_desired_level(u8 status)
4653 {
4654         if ((status &
4655              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4656                 if (status > 7)
4657                         fan_control_desired_level = 7;
4658                 else
4659                         fan_control_desired_level = status;
4660         }
4661 }
4662
4663 static int fan_get_status(u8 *status)
4664 {
4665         u8 s;
4666
4667         /* TODO:
4668          * Add TPACPI_FAN_RD_ACPI_FANS ? */
4669
4670         switch (fan_status_access_mode) {
4671         case TPACPI_FAN_RD_ACPI_GFAN:
4672                 /* 570, 600e/x, 770e, 770x */
4673
4674                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4675                         return -EIO;
4676
4677                 if (likely(status))
4678                         *status = s & 0x07;
4679
4680                 break;
4681
4682         case TPACPI_FAN_RD_TPEC:
4683                 /* all except 570, 600e/x, 770e, 770x */
4684                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4685                         return -EIO;
4686
4687                 if (likely(status))
4688                         *status = s;
4689
4690                 break;
4691
4692         default:
4693                 return -ENXIO;
4694         }
4695
4696         return 0;
4697 }
4698
4699 static int fan_get_status_safe(u8 *status)
4700 {
4701         int rc;
4702         u8 s;
4703
4704         if (mutex_lock_interruptible(&fan_mutex))
4705                 return -ERESTARTSYS;
4706         rc = fan_get_status(&s);
4707         if (!rc)
4708                 fan_update_desired_level(s);
4709         mutex_unlock(&fan_mutex);
4710
4711         if (status)
4712                 *status = s;
4713
4714         return rc;
4715 }
4716
4717 static int fan_get_speed(unsigned int *speed)
4718 {
4719         u8 hi, lo;
4720
4721         switch (fan_status_access_mode) {
4722         case TPACPI_FAN_RD_TPEC:
4723                 /* all except 570, 600e/x, 770e, 770x */
4724                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4725                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4726                         return -EIO;
4727
4728                 if (likely(speed))
4729                         *speed = (hi << 8) | lo;
4730
4731                 break;
4732
4733         default:
4734                 return -ENXIO;
4735         }
4736
4737         return 0;
4738 }
4739
4740 static int fan_set_level(int level)
4741 {
4742         if (!fan_control_allowed)
4743                 return -EPERM;
4744
4745         switch (fan_control_access_mode) {
4746         case TPACPI_FAN_WR_ACPI_SFAN:
4747                 if (level >= 0 && level <= 7) {
4748                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4749                                 return -EIO;
4750                 } else
4751                         return -EINVAL;
4752                 break;
4753
4754         case TPACPI_FAN_WR_ACPI_FANS:
4755         case TPACPI_FAN_WR_TPEC:
4756                 if ((level != TP_EC_FAN_AUTO) &&
4757                     (level != TP_EC_FAN_FULLSPEED) &&
4758                     ((level < 0) || (level > 7)))
4759                         return -EINVAL;
4760
4761                 /* safety net should the EC not support AUTO
4762                  * or FULLSPEED mode bits and just ignore them */
4763                 if (level & TP_EC_FAN_FULLSPEED)
4764                         level |= 7;     /* safety min speed 7 */
4765                 else if (level & TP_EC_FAN_FULLSPEED)
4766                         level |= 4;     /* safety min speed 4 */
4767
4768                 if (!acpi_ec_write(fan_status_offset, level))
4769                         return -EIO;
4770                 else
4771                         tp_features.fan_ctrl_status_undef = 0;
4772                 break;
4773
4774         default:
4775                 return -ENXIO;
4776         }
4777         return 0;
4778 }
4779
4780 static int fan_set_level_safe(int level)
4781 {
4782         int rc;
4783
4784         if (!fan_control_allowed)
4785                 return -EPERM;
4786
4787         if (mutex_lock_interruptible(&fan_mutex))
4788                 return -ERESTARTSYS;
4789
4790         if (level == TPACPI_FAN_LAST_LEVEL)
4791                 level = fan_control_desired_level;
4792
4793         rc = fan_set_level(level);
4794         if (!rc)
4795                 fan_update_desired_level(level);
4796
4797         mutex_unlock(&fan_mutex);
4798         return rc;
4799 }
4800
4801 static int fan_set_enable(void)
4802 {
4803         u8 s;
4804         int rc;
4805
4806         if (!fan_control_allowed)
4807                 return -EPERM;
4808
4809         if (mutex_lock_interruptible(&fan_mutex))
4810                 return -ERESTARTSYS;
4811
4812         switch (fan_control_access_mode) {
4813         case TPACPI_FAN_WR_ACPI_FANS:
4814         case TPACPI_FAN_WR_TPEC:
4815                 rc = fan_get_status(&s);
4816                 if (rc < 0)
4817                         break;
4818
4819                 /* Don't go out of emergency fan mode */
4820                 if (s != 7) {
4821                         s &= 0x07;
4822                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4823                 }
4824
4825                 if (!acpi_ec_write(fan_status_offset, s))
4826                         rc = -EIO;
4827                 else {
4828                         tp_features.fan_ctrl_status_undef = 0;
4829                         rc = 0;
4830                 }
4831                 break;
4832
4833         case TPACPI_FAN_WR_ACPI_SFAN:
4834                 rc = fan_get_status(&s);
4835                 if (rc < 0)
4836                         break;
4837
4838                 s &= 0x07;
4839
4840                 /* Set fan to at least level 4 */
4841                 s |= 4;
4842
4843                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4844                         rc = -EIO;
4845                 else
4846                         rc = 0;
4847                 break;
4848
4849         default:
4850                 rc = -ENXIO;
4851         }
4852
4853         mutex_unlock(&fan_mutex);
4854         return rc;
4855 }
4856
4857 static int fan_set_disable(void)
4858 {
4859         int rc;
4860
4861         if (!fan_control_allowed)
4862                 return -EPERM;
4863
4864         if (mutex_lock_interruptible(&fan_mutex))
4865                 return -ERESTARTSYS;
4866
4867         rc = 0;
4868         switch (fan_control_access_mode) {
4869         case TPACPI_FAN_WR_ACPI_FANS:
4870         case TPACPI_FAN_WR_TPEC:
4871                 if (!acpi_ec_write(fan_status_offset, 0x00))
4872                         rc = -EIO;
4873                 else {
4874                         fan_control_desired_level = 0;
4875                         tp_features.fan_ctrl_status_undef = 0;
4876                 }
4877                 break;
4878
4879         case TPACPI_FAN_WR_ACPI_SFAN:
4880                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4881                         rc = -EIO;
4882                 else
4883                         fan_control_desired_level = 0;
4884                 break;
4885
4886         default:
4887                 rc = -ENXIO;
4888         }
4889
4890
4891         mutex_unlock(&fan_mutex);
4892         return rc;
4893 }
4894
4895 static int fan_set_speed(int speed)
4896 {
4897         int rc;
4898
4899         if (!fan_control_allowed)
4900                 return -EPERM;
4901
4902         if (mutex_lock_interruptible(&fan_mutex))
4903                 return -ERESTARTSYS;
4904
4905         rc = 0;
4906         switch (fan_control_access_mode) {
4907         case TPACPI_FAN_WR_ACPI_FANS:
4908                 if (speed >= 0 && speed <= 65535) {
4909                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4910                                         speed, speed, speed))
4911                                 rc = -EIO;
4912                 } else
4913                         rc = -EINVAL;
4914                 break;
4915
4916         default:
4917                 rc = -ENXIO;
4918         }
4919
4920         mutex_unlock(&fan_mutex);
4921         return rc;
4922 }
4923
4924 static void fan_watchdog_reset(void)
4925 {
4926         static int fan_watchdog_active;
4927
4928         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
4929                 return;
4930
4931         if (fan_watchdog_active)
4932                 cancel_delayed_work(&fan_watchdog_task);
4933
4934         if (fan_watchdog_maxinterval > 0 &&
4935             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
4936                 fan_watchdog_active = 1;
4937                 if (!schedule_delayed_work(&fan_watchdog_task,
4938                                 msecs_to_jiffies(fan_watchdog_maxinterval
4939                                                  * 1000))) {
4940                         printk(TPACPI_ERR
4941                                "failed to schedule the fan watchdog, "
4942                                "watchdog will not trigger\n");
4943                 }
4944         } else
4945                 fan_watchdog_active = 0;
4946 }
4947
4948 static void fan_watchdog_fire(struct work_struct *ignored)
4949 {
4950         int rc;
4951
4952         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
4953                 return;
4954
4955         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
4956         rc = fan_set_enable();
4957         if (rc < 0) {
4958                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
4959                         "will try again later...\n", -rc);
4960                 /* reschedule for later */
4961                 fan_watchdog_reset();
4962         }
4963 }
4964
4965 /*
4966  * SYSFS fan layout: hwmon compatible (device)
4967  *
4968  * pwm*_enable:
4969  *      0: "disengaged" mode
4970  *      1: manual mode
4971  *      2: native EC "auto" mode (recommended, hardware default)
4972  *
4973  * pwm*: set speed in manual mode, ignored otherwise.
4974  *      0 is level 0; 255 is level 7. Intermediate points done with linear
4975  *      interpolation.
4976  *
4977  * fan*_input: tachometer reading, RPM
4978  *
4979  *
4980  * SYSFS fan layout: extensions
4981  *
4982  * fan_watchdog (driver):
4983  *      fan watchdog interval in seconds, 0 disables (default), max 120
4984  */
4985
4986 /* sysfs fan pwm1_enable ----------------------------------------------- */
4987 static ssize_t fan_pwm1_enable_show(struct device *dev,
4988                                     struct device_attribute *attr,
4989                                     char *buf)
4990 {
4991         int res, mode;
4992         u8 status;
4993
4994         res = fan_get_status_safe(&status);
4995         if (res)
4996                 return res;
4997
4998         if (unlikely(tp_features.fan_ctrl_status_undef)) {
4999                 if (status != fan_control_initial_status) {
5000                         tp_features.fan_ctrl_status_undef = 0;
5001                 } else {
5002                         /* Return most likely status. In fact, it
5003                          * might be the only possible status */
5004                         status = TP_EC_FAN_AUTO;
5005                 }
5006         }
5007
5008         if (status & TP_EC_FAN_FULLSPEED) {
5009                 mode = 0;
5010         } else if (status & TP_EC_FAN_AUTO) {
5011                 mode = 2;
5012         } else
5013                 mode = 1;
5014
5015         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5016 }
5017
5018 static ssize_t fan_pwm1_enable_store(struct device *dev,
5019                                      struct device_attribute *attr,
5020                                      const char *buf, size_t count)
5021 {
5022         unsigned long t;
5023         int res, level;
5024
5025         if (parse_strtoul(buf, 2, &t))
5026                 return -EINVAL;
5027
5028         switch (t) {
5029         case 0:
5030                 level = TP_EC_FAN_FULLSPEED;
5031                 break;
5032         case 1:
5033                 level = TPACPI_FAN_LAST_LEVEL;
5034                 break;
5035         case 2:
5036                 level = TP_EC_FAN_AUTO;
5037                 break;
5038         case 3:
5039                 /* reserved for software-controlled auto mode */
5040                 return -ENOSYS;
5041         default:
5042                 return -EINVAL;
5043         }
5044
5045         res = fan_set_level_safe(level);
5046         if (res == -ENXIO)
5047                 return -EINVAL;
5048         else if (res < 0)
5049                 return res;
5050
5051         fan_watchdog_reset();
5052
5053         return count;
5054 }
5055
5056 static struct device_attribute dev_attr_fan_pwm1_enable =
5057         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5058                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5059
5060 /* sysfs fan pwm1 ------------------------------------------------------ */
5061 static ssize_t fan_pwm1_show(struct device *dev,
5062                              struct device_attribute *attr,
5063                              char *buf)
5064 {
5065         int res;
5066         u8 status;
5067
5068         res = fan_get_status_safe(&status);
5069         if (res)
5070                 return res;
5071
5072         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5073                 if (status != fan_control_initial_status) {
5074                         tp_features.fan_ctrl_status_undef = 0;
5075                 } else {
5076                         status = TP_EC_FAN_AUTO;
5077                 }
5078         }
5079
5080         if ((status &
5081              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5082                 status = fan_control_desired_level;
5083
5084         if (status > 7)
5085                 status = 7;
5086
5087         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5088 }
5089
5090 static ssize_t fan_pwm1_store(struct device *dev,
5091                               struct device_attribute *attr,
5092                               const char *buf, size_t count)
5093 {
5094         unsigned long s;
5095         int rc;
5096         u8 status, newlevel;
5097
5098         if (parse_strtoul(buf, 255, &s))
5099                 return -EINVAL;
5100
5101         /* scale down from 0-255 to 0-7 */
5102         newlevel = (s >> 5) & 0x07;
5103
5104         if (mutex_lock_interruptible(&fan_mutex))
5105                 return -ERESTARTSYS;
5106
5107         rc = fan_get_status(&status);
5108         if (!rc && (status &
5109                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5110                 rc = fan_set_level(newlevel);
5111                 if (rc == -ENXIO)
5112                         rc = -EINVAL;
5113                 else if (!rc) {
5114                         fan_update_desired_level(newlevel);
5115                         fan_watchdog_reset();
5116                 }
5117         }
5118
5119         mutex_unlock(&fan_mutex);
5120         return (rc)? rc : count;
5121 }
5122
5123 static struct device_attribute dev_attr_fan_pwm1 =
5124         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5125                 fan_pwm1_show, fan_pwm1_store);
5126
5127 /* sysfs fan fan1_input ------------------------------------------------ */
5128 static ssize_t fan_fan1_input_show(struct device *dev,
5129                            struct device_attribute *attr,
5130                            char *buf)
5131 {
5132         int res;
5133         unsigned int speed;
5134
5135         res = fan_get_speed(&speed);
5136         if (res < 0)
5137                 return res;
5138
5139         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5140 }
5141
5142 static struct device_attribute dev_attr_fan_fan1_input =
5143         __ATTR(fan1_input, S_IRUGO,
5144                 fan_fan1_input_show, NULL);
5145
5146 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5147 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5148                                      char *buf)
5149 {
5150         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5151 }
5152
5153 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5154                                       const char *buf, size_t count)
5155 {
5156         unsigned long t;
5157
5158         if (parse_strtoul(buf, 120, &t))
5159                 return -EINVAL;
5160
5161         if (!fan_control_allowed)
5162                 return -EPERM;
5163
5164         fan_watchdog_maxinterval = t;
5165         fan_watchdog_reset();
5166
5167         return count;
5168 }
5169
5170 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5171                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5172
5173 /* --------------------------------------------------------------------- */
5174 static struct attribute *fan_attributes[] = {
5175         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5176         &dev_attr_fan_fan1_input.attr,
5177         NULL
5178 };
5179
5180 static const struct attribute_group fan_attr_group = {
5181         .attrs = fan_attributes,
5182 };
5183
5184 static int __init fan_init(struct ibm_init_struct *iibm)
5185 {
5186         int rc;
5187
5188         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5189
5190         mutex_init(&fan_mutex);
5191         fan_status_access_mode = TPACPI_FAN_NONE;
5192         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5193         fan_control_commands = 0;
5194         fan_watchdog_maxinterval = 0;
5195         tp_features.fan_ctrl_status_undef = 0;
5196         fan_control_desired_level = 7;
5197
5198         TPACPI_ACPIHANDLE_INIT(fans);
5199         TPACPI_ACPIHANDLE_INIT(gfan);
5200         TPACPI_ACPIHANDLE_INIT(sfan);
5201
5202         if (gfan_handle) {
5203                 /* 570, 600e/x, 770e, 770x */
5204                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5205         } else {
5206                 /* all other ThinkPads: note that even old-style
5207                  * ThinkPad ECs supports the fan control register */
5208                 if (likely(acpi_ec_read(fan_status_offset,
5209                                         &fan_control_initial_status))) {
5210                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5211
5212                         /* In some ThinkPads, neither the EC nor the ACPI
5213                          * DSDT initialize the fan status, and it ends up
5214                          * being set to 0x07 when it *could* be either
5215                          * 0x07 or 0x80.
5216                          *
5217                          * Enable for TP-1Y (T43), TP-78 (R51e),
5218                          * TP-76 (R52), TP-70 (T43, R52), which are known
5219                          * to be buggy. */
5220                         if (fan_control_initial_status == 0x07) {
5221                                 switch (thinkpad_id.ec_model) {
5222                                 case 0x5931: /* TP-1Y */
5223                                 case 0x3837: /* TP-78 */
5224                                 case 0x3637: /* TP-76 */
5225                                 case 0x3037: /* TP-70 */
5226                                         printk(TPACPI_NOTICE
5227                                                "fan_init: initial fan status "
5228                                                "is unknown, assuming it is "
5229                                                "in auto mode\n");
5230                                         tp_features.fan_ctrl_status_undef = 1;
5231                                         ;;
5232                                 }
5233                         }
5234                 } else {
5235                         printk(TPACPI_ERR
5236                                "ThinkPad ACPI EC access misbehaving, "
5237                                "fan status and control unavailable\n");
5238                         return 1;
5239                 }
5240         }
5241
5242         if (sfan_handle) {
5243                 /* 570, 770x-JL */
5244                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5245                 fan_control_commands |=
5246                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5247         } else {
5248                 if (!gfan_handle) {
5249                         /* gfan without sfan means no fan control */
5250                         /* all other models implement TP EC 0x2f control */
5251
5252                         if (fans_handle) {
5253                                 /* X31, X40, X41 */
5254                                 fan_control_access_mode =
5255                                     TPACPI_FAN_WR_ACPI_FANS;
5256                                 fan_control_commands |=
5257                                     TPACPI_FAN_CMD_SPEED |
5258                                     TPACPI_FAN_CMD_LEVEL |
5259                                     TPACPI_FAN_CMD_ENABLE;
5260                         } else {
5261                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5262                                 fan_control_commands |=
5263                                     TPACPI_FAN_CMD_LEVEL |
5264                                     TPACPI_FAN_CMD_ENABLE;
5265                         }
5266                 }
5267         }
5268
5269         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5270                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5271                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5272                 fan_status_access_mode, fan_control_access_mode);
5273
5274         /* fan control master switch */
5275         if (!fan_control_allowed) {
5276                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5277                 fan_control_commands = 0;
5278                 dbg_printk(TPACPI_DBG_INIT,
5279                            "fan control features disabled by parameter\n");
5280         }
5281
5282         /* update fan_control_desired_level */
5283         if (fan_status_access_mode != TPACPI_FAN_NONE)
5284                 fan_get_status_safe(NULL);
5285
5286         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5287             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5288                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5289                                          &fan_attr_group);
5290                 if (!(rc < 0))
5291                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5292                                         &driver_attr_fan_watchdog);
5293                 if (rc < 0)
5294                         return rc;
5295                 return 0;
5296         } else
5297                 return 1;
5298 }
5299
5300 static void fan_exit(void)
5301 {
5302         vdbg_printk(TPACPI_DBG_EXIT,
5303                     "cancelling any pending fan watchdog tasks\n");
5304
5305         /* FIXME: can we really do this unconditionally? */
5306         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5307         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5308                            &driver_attr_fan_watchdog);
5309
5310         cancel_delayed_work(&fan_watchdog_task);
5311         flush_scheduled_work();
5312 }
5313
5314 static int fan_read(char *p)
5315 {
5316         int len = 0;
5317         int rc;
5318         u8 status;
5319         unsigned int speed = 0;
5320
5321         switch (fan_status_access_mode) {
5322         case TPACPI_FAN_RD_ACPI_GFAN:
5323                 /* 570, 600e/x, 770e, 770x */
5324                 rc = fan_get_status_safe(&status);
5325                 if (rc < 0)
5326                         return rc;
5327
5328                 len += sprintf(p + len, "status:\t\t%s\n"
5329                                "level:\t\t%d\n",
5330                                (status != 0) ? "enabled" : "disabled", status);
5331                 break;
5332
5333         case TPACPI_FAN_RD_TPEC:
5334                 /* all except 570, 600e/x, 770e, 770x */
5335                 rc = fan_get_status_safe(&status);
5336                 if (rc < 0)
5337                         return rc;
5338
5339                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5340                         if (status != fan_control_initial_status)
5341                                 tp_features.fan_ctrl_status_undef = 0;
5342                         else
5343                                 /* Return most likely status. In fact, it
5344                                  * might be the only possible status */
5345                                 status = TP_EC_FAN_AUTO;
5346                 }
5347
5348                 len += sprintf(p + len, "status:\t\t%s\n",
5349                                (status != 0) ? "enabled" : "disabled");
5350
5351                 rc = fan_get_speed(&speed);
5352                 if (rc < 0)
5353                         return rc;
5354
5355                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5356
5357                 if (status & TP_EC_FAN_FULLSPEED)
5358                         /* Disengaged mode takes precedence */
5359                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5360                 else if (status & TP_EC_FAN_AUTO)
5361                         len += sprintf(p + len, "level:\t\tauto\n");
5362                 else
5363                         len += sprintf(p + len, "level:\t\t%d\n", status);
5364                 break;
5365
5366         case TPACPI_FAN_NONE:
5367         default:
5368                 len += sprintf(p + len, "status:\t\tnot supported\n");
5369         }
5370
5371         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5372                 len += sprintf(p + len, "commands:\tlevel <level>");
5373
5374                 switch (fan_control_access_mode) {
5375                 case TPACPI_FAN_WR_ACPI_SFAN:
5376                         len += sprintf(p + len, " (<level> is 0-7)\n");
5377                         break;
5378
5379                 default:
5380                         len += sprintf(p + len, " (<level> is 0-7, "
5381                                        "auto, disengaged, full-speed)\n");
5382                         break;
5383                 }
5384         }
5385
5386         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5387                 len += sprintf(p + len, "commands:\tenable, disable\n"
5388                                "commands:\twatchdog <timeout> (<timeout> "
5389                                "is 0 (off), 1-120 (seconds))\n");
5390
5391         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5392                 len += sprintf(p + len, "commands:\tspeed <speed>"
5393                                " (<speed> is 0-65535)\n");
5394
5395         return len;
5396 }
5397
5398 static int fan_write_cmd_level(const char *cmd, int *rc)
5399 {
5400         int level;
5401
5402         if (strlencmp(cmd, "level auto") == 0)
5403                 level = TP_EC_FAN_AUTO;
5404         else if ((strlencmp(cmd, "level disengaged") == 0) |
5405                         (strlencmp(cmd, "level full-speed") == 0))
5406                 level = TP_EC_FAN_FULLSPEED;
5407         else if (sscanf(cmd, "level %d", &level) != 1)
5408                 return 0;
5409
5410         *rc = fan_set_level_safe(level);
5411         if (*rc == -ENXIO)
5412                 printk(TPACPI_ERR "level command accepted for unsupported "
5413                        "access mode %d", fan_control_access_mode);
5414
5415         return 1;
5416 }
5417
5418 static int fan_write_cmd_enable(const char *cmd, int *rc)
5419 {
5420         if (strlencmp(cmd, "enable") != 0)
5421                 return 0;
5422
5423         *rc = fan_set_enable();
5424         if (*rc == -ENXIO)
5425                 printk(TPACPI_ERR "enable command accepted for unsupported "
5426                        "access mode %d", fan_control_access_mode);
5427
5428         return 1;
5429 }
5430
5431 static int fan_write_cmd_disable(const char *cmd, int *rc)
5432 {
5433         if (strlencmp(cmd, "disable") != 0)
5434                 return 0;
5435
5436         *rc = fan_set_disable();
5437         if (*rc == -ENXIO)
5438                 printk(TPACPI_ERR "disable command accepted for unsupported "
5439                        "access mode %d", fan_control_access_mode);
5440
5441         return 1;
5442 }
5443
5444 static int fan_write_cmd_speed(const char *cmd, int *rc)
5445 {
5446         int speed;
5447
5448         /* TODO:
5449          * Support speed <low> <medium> <high> ? */
5450
5451         if (sscanf(cmd, "speed %d", &speed) != 1)
5452                 return 0;
5453
5454         *rc = fan_set_speed(speed);
5455         if (*rc == -ENXIO)
5456                 printk(TPACPI_ERR "speed command accepted for unsupported "
5457                        "access mode %d", fan_control_access_mode);
5458
5459         return 1;
5460 }
5461
5462 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5463 {
5464         int interval;
5465
5466         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5467                 return 0;
5468
5469         if (interval < 0 || interval > 120)
5470                 *rc = -EINVAL;
5471         else
5472                 fan_watchdog_maxinterval = interval;
5473
5474         return 1;
5475 }
5476
5477 static int fan_write(char *buf)
5478 {
5479         char *cmd;
5480         int rc = 0;
5481
5482         while (!rc && (cmd = next_cmd(&buf))) {
5483                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5484                       fan_write_cmd_level(cmd, &rc)) &&
5485                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5486                       (fan_write_cmd_enable(cmd, &rc) ||
5487                        fan_write_cmd_disable(cmd, &rc) ||
5488                        fan_write_cmd_watchdog(cmd, &rc))) &&
5489                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5490                       fan_write_cmd_speed(cmd, &rc))
5491                     )
5492                         rc = -EINVAL;
5493                 else if (!rc)
5494                         fan_watchdog_reset();
5495         }
5496
5497         return rc;
5498 }
5499
5500 static struct ibm_struct fan_driver_data = {
5501         .name = "fan",
5502         .read = fan_read,
5503         .write = fan_write,
5504         .exit = fan_exit,
5505 };
5506
5507 /****************************************************************************
5508  ****************************************************************************
5509  *
5510  * Infrastructure
5511  *
5512  ****************************************************************************
5513  ****************************************************************************/
5514
5515 /* sysfs name ---------------------------------------------------------- */
5516 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5517                            struct device_attribute *attr,
5518                            char *buf)
5519 {
5520         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5521 }
5522
5523 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5524         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5525
5526 /* --------------------------------------------------------------------- */
5527
5528 /* /proc support */
5529 static struct proc_dir_entry *proc_dir;
5530
5531 /*
5532  * Module and infrastructure proble, init and exit handling
5533  */
5534
5535 static int force_load;
5536
5537 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5538 static const char * __init str_supported(int is_supported)
5539 {
5540         static char text_unsupported[] __initdata = "not supported";
5541
5542         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5543 }
5544 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5545
5546 static void ibm_exit(struct ibm_struct *ibm)
5547 {
5548         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5549
5550         list_del_init(&ibm->all_drivers);
5551
5552         if (ibm->flags.acpi_notify_installed) {
5553                 dbg_printk(TPACPI_DBG_EXIT,
5554                         "%s: acpi_remove_notify_handler\n", ibm->name);
5555                 BUG_ON(!ibm->acpi);
5556                 acpi_remove_notify_handler(*ibm->acpi->handle,
5557                                            ibm->acpi->type,
5558                                            dispatch_acpi_notify);
5559                 ibm->flags.acpi_notify_installed = 0;
5560                 ibm->flags.acpi_notify_installed = 0;
5561         }
5562
5563         if (ibm->flags.proc_created) {
5564                 dbg_printk(TPACPI_DBG_EXIT,
5565                         "%s: remove_proc_entry\n", ibm->name);
5566                 remove_proc_entry(ibm->name, proc_dir);
5567                 ibm->flags.proc_created = 0;
5568         }
5569
5570         if (ibm->flags.acpi_driver_registered) {
5571                 dbg_printk(TPACPI_DBG_EXIT,
5572                         "%s: acpi_bus_unregister_driver\n", ibm->name);
5573                 BUG_ON(!ibm->acpi);
5574                 acpi_bus_unregister_driver(ibm->acpi->driver);
5575                 kfree(ibm->acpi->driver);
5576                 ibm->acpi->driver = NULL;
5577                 ibm->flags.acpi_driver_registered = 0;
5578         }
5579
5580         if (ibm->flags.init_called && ibm->exit) {
5581                 ibm->exit();
5582                 ibm->flags.init_called = 0;
5583         }
5584
5585         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5586 }
5587
5588 static int __init ibm_init(struct ibm_init_struct *iibm)
5589 {
5590         int ret;
5591         struct ibm_struct *ibm = iibm->data;
5592         struct proc_dir_entry *entry;
5593
5594         BUG_ON(ibm == NULL);
5595
5596         INIT_LIST_HEAD(&ibm->all_drivers);
5597
5598         if (ibm->flags.experimental && !experimental)
5599                 return 0;
5600
5601         dbg_printk(TPACPI_DBG_INIT,
5602                 "probing for %s\n", ibm->name);
5603
5604         if (iibm->init) {
5605                 ret = iibm->init(iibm);
5606                 if (ret > 0)
5607                         return 0;       /* probe failed */
5608                 if (ret)
5609                         return ret;
5610
5611                 ibm->flags.init_called = 1;
5612         }
5613
5614         if (ibm->acpi) {
5615                 if (ibm->acpi->hid) {
5616                         ret = register_tpacpi_subdriver(ibm);
5617                         if (ret)
5618                                 goto err_out;
5619                 }
5620
5621                 if (ibm->acpi->notify) {
5622                         ret = setup_acpi_notify(ibm);
5623                         if (ret == -ENODEV) {
5624                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5625                                         ibm->name);
5626                                 ret = 0;
5627                                 goto err_out;
5628                         }
5629                         if (ret < 0)
5630                                 goto err_out;
5631                 }
5632         }
5633
5634         dbg_printk(TPACPI_DBG_INIT,
5635                 "%s installed\n", ibm->name);
5636
5637         if (ibm->read) {
5638                 entry = create_proc_entry(ibm->name,
5639                                           S_IFREG | S_IRUGO | S_IWUSR,
5640                                           proc_dir);
5641                 if (!entry) {
5642                         printk(TPACPI_ERR "unable to create proc entry %s\n",
5643                                ibm->name);
5644                         ret = -ENODEV;
5645                         goto err_out;
5646                 }
5647                 entry->owner = THIS_MODULE;
5648                 entry->data = ibm;
5649                 entry->read_proc = &dispatch_procfs_read;
5650                 if (ibm->write)
5651                         entry->write_proc = &dispatch_procfs_write;
5652                 ibm->flags.proc_created = 1;
5653         }
5654
5655         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5656
5657         return 0;
5658
5659 err_out:
5660         dbg_printk(TPACPI_DBG_INIT,
5661                 "%s: at error exit path with result %d\n",
5662                 ibm->name, ret);
5663
5664         ibm_exit(ibm);
5665         return (ret < 0)? ret : 0;
5666 }
5667
5668 /* Probing */
5669
5670 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5671 {
5672         const struct dmi_device *dev = NULL;
5673         char ec_fw_string[18];
5674
5675         if (!tp)
5676                 return;
5677
5678         memset(tp, 0, sizeof(*tp));
5679
5680         if (dmi_name_in_vendors("IBM"))
5681                 tp->vendor = PCI_VENDOR_ID_IBM;
5682         else if (dmi_name_in_vendors("LENOVO"))
5683                 tp->vendor = PCI_VENDOR_ID_LENOVO;
5684         else
5685                 return;
5686
5687         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5688                                         GFP_KERNEL);
5689         if (!tp->bios_version_str)
5690                 return;
5691         tp->bios_model = tp->bios_version_str[0]
5692                          | (tp->bios_version_str[1] << 8);
5693
5694         /*
5695          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5696          * X32 or newer, all Z series;  Some models must have an
5697          * up-to-date BIOS or they will not be detected.
5698          *
5699          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5700          */
5701         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5702                 if (sscanf(dev->name,
5703                            "IBM ThinkPad Embedded Controller -[%17c",
5704                            ec_fw_string) == 1) {
5705                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5706                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5707
5708                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5709                         tp->ec_model = ec_fw_string[0]
5710                                         | (ec_fw_string[1] << 8);
5711                         break;
5712                 }
5713         }
5714
5715         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5716                                         GFP_KERNEL);
5717         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5718                 kfree(tp->model_str);
5719                 tp->model_str = NULL;
5720         }
5721 }
5722
5723 static int __init probe_for_thinkpad(void)
5724 {
5725         int is_thinkpad;
5726
5727         if (acpi_disabled)
5728                 return -ENODEV;
5729
5730         /*
5731          * Non-ancient models have better DMI tagging, but very old models
5732          * don't.
5733          */
5734         is_thinkpad = (thinkpad_id.model_str != NULL);
5735
5736         /* ec is required because many other handles are relative to it */
5737         TPACPI_ACPIHANDLE_INIT(ec);
5738         if (!ec_handle) {
5739                 if (is_thinkpad)
5740                         printk(TPACPI_ERR
5741                                 "Not yet supported ThinkPad detected!\n");
5742                 return -ENODEV;
5743         }
5744
5745         /*
5746          * Risks a regression on very old machines, but reduces potential
5747          * false positives a damn great deal
5748          */
5749         if (!is_thinkpad)
5750                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5751
5752         if (!is_thinkpad && !force_load)
5753                 return -ENODEV;
5754
5755         return 0;
5756 }
5757
5758
5759 /* Module init, exit, parameters */
5760
5761 static struct ibm_init_struct ibms_init[] __initdata = {
5762         {
5763                 .init = thinkpad_acpi_driver_init,
5764                 .data = &thinkpad_acpi_driver_data,
5765         },
5766         {
5767                 .init = hotkey_init,
5768                 .data = &hotkey_driver_data,
5769         },
5770         {
5771                 .init = bluetooth_init,
5772                 .data = &bluetooth_driver_data,
5773         },
5774         {
5775                 .init = wan_init,
5776                 .data = &wan_driver_data,
5777         },
5778         {
5779                 .init = video_init,
5780                 .data = &video_driver_data,
5781         },
5782         {
5783                 .init = light_init,
5784                 .data = &light_driver_data,
5785         },
5786 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5787         {
5788                 .init = dock_init,
5789                 .data = &dock_driver_data[0],
5790         },
5791         {
5792                 .init = dock_init2,
5793                 .data = &dock_driver_data[1],
5794         },
5795 #endif
5796 #ifdef CONFIG_THINKPAD_ACPI_BAY
5797         {
5798                 .init = bay_init,
5799                 .data = &bay_driver_data,
5800         },
5801 #endif
5802         {
5803                 .init = cmos_init,
5804                 .data = &cmos_driver_data,
5805         },
5806         {
5807                 .init = led_init,
5808                 .data = &led_driver_data,
5809         },
5810         {
5811                 .init = beep_init,
5812                 .data = &beep_driver_data,
5813         },
5814         {
5815                 .init = thermal_init,
5816                 .data = &thermal_driver_data,
5817         },
5818         {
5819                 .data = &ecdump_driver_data,
5820         },
5821         {
5822                 .init = brightness_init,
5823                 .data = &brightness_driver_data,
5824         },
5825         {
5826                 .data = &volume_driver_data,
5827         },
5828         {
5829                 .init = fan_init,
5830                 .data = &fan_driver_data,
5831         },
5832 };
5833
5834 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
5835 {
5836         unsigned int i;
5837         struct ibm_struct *ibm;
5838
5839         if (!kp || !kp->name || !val)
5840                 return -EINVAL;
5841
5842         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5843                 ibm = ibms_init[i].data;
5844                 WARN_ON(ibm == NULL);
5845
5846                 if (!ibm || !ibm->name)
5847                         continue;
5848
5849                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
5850                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
5851                                 return -ENOSPC;
5852                         strcpy(ibms_init[i].param, val);
5853                         strcat(ibms_init[i].param, ",");
5854                         return 0;
5855                 }
5856         }
5857
5858         return -EINVAL;
5859 }
5860
5861 module_param(experimental, int, 0);
5862 MODULE_PARM_DESC(experimental,
5863                  "Enables experimental features when non-zero");
5864
5865 module_param_named(debug, dbg_level, uint, 0);
5866 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
5867
5868 module_param(force_load, bool, 0);
5869 MODULE_PARM_DESC(force_load,
5870                  "Attempts to load the driver even on a "
5871                  "mis-identified ThinkPad when true");
5872
5873 module_param_named(fan_control, fan_control_allowed, bool, 0);
5874 MODULE_PARM_DESC(fan_control,
5875                  "Enables setting fan parameters features when true");
5876
5877 module_param_named(brightness_mode, brightness_mode, int, 0);
5878 MODULE_PARM_DESC(brightness_mode,
5879                  "Selects brightness control strategy: "
5880                  "0=auto, 1=EC, 2=CMOS, 3=both");
5881
5882 module_param(brightness_enable, uint, 0);
5883 MODULE_PARM_DESC(brightness_enable,
5884                  "Enables backlight control when 1, disables when 0");
5885
5886 module_param(hotkey_report_mode, uint, 0);
5887 MODULE_PARM_DESC(hotkey_report_mode,
5888                  "used for backwards compatibility with userspace, "
5889                  "see documentation");
5890
5891 #define TPACPI_PARAM(feature) \
5892         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
5893         MODULE_PARM_DESC(feature, "Simulates thinkpad-aci procfs command " \
5894                          "at module load, see documentation")
5895
5896 TPACPI_PARAM(hotkey);
5897 TPACPI_PARAM(bluetooth);
5898 TPACPI_PARAM(video);
5899 TPACPI_PARAM(light);
5900 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5901 TPACPI_PARAM(dock);
5902 #endif
5903 #ifdef CONFIG_THINKPAD_ACPI_BAY
5904 TPACPI_PARAM(bay);
5905 #endif /* CONFIG_THINKPAD_ACPI_BAY */
5906 TPACPI_PARAM(cmos);
5907 TPACPI_PARAM(led);
5908 TPACPI_PARAM(beep);
5909 TPACPI_PARAM(ecdump);
5910 TPACPI_PARAM(brightness);
5911 TPACPI_PARAM(volume);
5912 TPACPI_PARAM(fan);
5913
5914 static void thinkpad_acpi_module_exit(void)
5915 {
5916         struct ibm_struct *ibm, *itmp;
5917
5918         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
5919
5920         list_for_each_entry_safe_reverse(ibm, itmp,
5921                                          &tpacpi_all_drivers,
5922                                          all_drivers) {
5923                 ibm_exit(ibm);
5924         }
5925
5926         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
5927
5928         if (tpacpi_inputdev) {
5929                 if (tp_features.input_device_registered)
5930                         input_unregister_device(tpacpi_inputdev);
5931                 else
5932                         input_free_device(tpacpi_inputdev);
5933         }
5934
5935         if (tpacpi_hwmon)
5936                 hwmon_device_unregister(tpacpi_hwmon);
5937
5938         if (tp_features.sensors_pdev_attrs_registered)
5939                 device_remove_file(&tpacpi_sensors_pdev->dev,
5940                                    &dev_attr_thinkpad_acpi_pdev_name);
5941         if (tpacpi_sensors_pdev)
5942                 platform_device_unregister(tpacpi_sensors_pdev);
5943         if (tpacpi_pdev)
5944                 platform_device_unregister(tpacpi_pdev);
5945
5946         if (tp_features.sensors_pdrv_attrs_registered)
5947                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
5948         if (tp_features.platform_drv_attrs_registered)
5949                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
5950
5951         if (tp_features.sensors_pdrv_registered)
5952                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
5953
5954         if (tp_features.platform_drv_registered)
5955                 platform_driver_unregister(&tpacpi_pdriver);
5956
5957         if (proc_dir)
5958                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
5959
5960         kfree(thinkpad_id.bios_version_str);
5961         kfree(thinkpad_id.ec_version_str);
5962         kfree(thinkpad_id.model_str);
5963 }
5964
5965
5966 static int __init thinkpad_acpi_module_init(void)
5967 {
5968         int ret, i;
5969
5970         tpacpi_lifecycle = TPACPI_LIFE_INIT;
5971
5972         /* Parameter checking */
5973         if (hotkey_report_mode > 2)
5974                 return -EINVAL;
5975
5976         /* Driver-level probe */
5977
5978         get_thinkpad_model_data(&thinkpad_id);
5979         ret = probe_for_thinkpad();
5980         if (ret) {
5981                 thinkpad_acpi_module_exit();
5982                 return ret;
5983         }
5984
5985         /* Driver initialization */
5986
5987         TPACPI_ACPIHANDLE_INIT(ecrd);
5988         TPACPI_ACPIHANDLE_INIT(ecwr);
5989
5990         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
5991         if (!proc_dir) {
5992                 printk(TPACPI_ERR
5993                        "unable to create proc dir " TPACPI_PROC_DIR);
5994                 thinkpad_acpi_module_exit();
5995                 return -ENODEV;
5996         }
5997         proc_dir->owner = THIS_MODULE;
5998
5999         ret = platform_driver_register(&tpacpi_pdriver);
6000         if (ret) {
6001                 printk(TPACPI_ERR
6002                        "unable to register main platform driver\n");
6003                 thinkpad_acpi_module_exit();
6004                 return ret;
6005         }
6006         tp_features.platform_drv_registered = 1;
6007
6008         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6009         if (ret) {
6010                 printk(TPACPI_ERR
6011                        "unable to register hwmon platform driver\n");
6012                 thinkpad_acpi_module_exit();
6013                 return ret;
6014         }
6015         tp_features.sensors_pdrv_registered = 1;
6016
6017         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6018         if (!ret) {
6019                 tp_features.platform_drv_attrs_registered = 1;
6020                 ret = tpacpi_create_driver_attributes(
6021                                         &tpacpi_hwmon_pdriver.driver);
6022         }
6023         if (ret) {
6024                 printk(TPACPI_ERR
6025                        "unable to create sysfs driver attributes\n");
6026                 thinkpad_acpi_module_exit();
6027                 return ret;
6028         }
6029         tp_features.sensors_pdrv_attrs_registered = 1;
6030
6031
6032         /* Device initialization */
6033         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6034                                                         NULL, 0);
6035         if (IS_ERR(tpacpi_pdev)) {
6036                 ret = PTR_ERR(tpacpi_pdev);
6037                 tpacpi_pdev = NULL;
6038                 printk(TPACPI_ERR "unable to register platform device\n");
6039                 thinkpad_acpi_module_exit();
6040                 return ret;
6041         }
6042         tpacpi_sensors_pdev = platform_device_register_simple(
6043                                                 TPACPI_HWMON_DRVR_NAME,
6044                                                 -1, NULL, 0);
6045         if (IS_ERR(tpacpi_sensors_pdev)) {
6046                 ret = PTR_ERR(tpacpi_sensors_pdev);
6047                 tpacpi_sensors_pdev = NULL;
6048                 printk(TPACPI_ERR
6049                        "unable to register hwmon platform device\n");
6050                 thinkpad_acpi_module_exit();
6051                 return ret;
6052         }
6053         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6054                                  &dev_attr_thinkpad_acpi_pdev_name);
6055         if (ret) {
6056                 printk(TPACPI_ERR
6057                        "unable to create sysfs hwmon device attributes\n");
6058                 thinkpad_acpi_module_exit();
6059                 return ret;
6060         }
6061         tp_features.sensors_pdev_attrs_registered = 1;
6062         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6063         if (IS_ERR(tpacpi_hwmon)) {
6064                 ret = PTR_ERR(tpacpi_hwmon);
6065                 tpacpi_hwmon = NULL;
6066                 printk(TPACPI_ERR "unable to register hwmon device\n");
6067                 thinkpad_acpi_module_exit();
6068                 return ret;
6069         }
6070         mutex_init(&tpacpi_inputdev_send_mutex);
6071         tpacpi_inputdev = input_allocate_device();
6072         if (!tpacpi_inputdev) {
6073                 printk(TPACPI_ERR "unable to allocate input device\n");
6074                 thinkpad_acpi_module_exit();
6075                 return -ENOMEM;
6076         } else {
6077                 /* Prepare input device, but don't register */
6078                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6079                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6080                 tpacpi_inputdev->id.bustype = BUS_HOST;
6081                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6082                                                 thinkpad_id.vendor :
6083                                                 PCI_VENDOR_ID_IBM;
6084                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6085                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6086         }
6087         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6088                 ret = ibm_init(&ibms_init[i]);
6089                 if (ret >= 0 && *ibms_init[i].param)
6090                         ret = ibms_init[i].data->write(ibms_init[i].param);
6091                 if (ret < 0) {
6092                         thinkpad_acpi_module_exit();
6093                         return ret;
6094                 }
6095         }
6096         ret = input_register_device(tpacpi_inputdev);
6097         if (ret < 0) {
6098                 printk(TPACPI_ERR "unable to register input device\n");
6099                 thinkpad_acpi_module_exit();
6100                 return ret;
6101         } else {
6102                 tp_features.input_device_registered = 1;
6103         }
6104
6105         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6106         return 0;
6107 }
6108
6109 /* Please remove this in year 2009 */
6110 MODULE_ALIAS("ibm_acpi");
6111
6112 /*
6113  * DMI matching for module autoloading
6114  *
6115  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6116  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6117  *
6118  * Only models listed in thinkwiki will be supported, so add yours
6119  * if it is not there yet.
6120  */
6121 #define IBM_BIOS_MODULE_ALIAS(__type) \
6122         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6123
6124 /* Non-ancient thinkpads */
6125 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6126 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6127
6128 /* Ancient thinkpad BIOSes have to be identified by
6129  * BIOS type or model number, and there are far less
6130  * BIOS types than model numbers... */
6131 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6132 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6133 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6134
6135 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6136 MODULE_DESCRIPTION(TPACPI_DESC);
6137 MODULE_VERSION(TPACPI_VERSION);
6138 MODULE_LICENSE("GPL");
6139
6140 module_init(thinkpad_acpi_module_init);
6141 module_exit(thinkpad_acpi_module_exit);