drivers/acpi/ibm_acpi.c

   1 /*
   2  *  ibm_acpi.c - IBM ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #define IBM_VERSION "0.12a"
  23
  24 /*
  25  *  Changelog:
  26  *
  27  *  2005-08-17  0.12    fix compilation on 2.6.13-rc kernels
  28  *  2005-03-17  0.11    support for 600e, 770x
  29  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  30  *                      support for 770e, G41
  31  *                      G40 and G41 don't have a thinklight
  32  *                      temperatures no longer experimental
  33  *                      experimental brightness control
  34  *                      experimental volume control
  35  *                      experimental fan enable/disable
  36  *  2005-01-16  0.10    fix module loading on R30, R31
  37  *  2005-01-16  0.9     support for 570, R30, R31
  38  *                      ultrabay support on A22p, A3x
  39  *                      limit arg for cmos, led, beep, drop experimental status
  40  *                      more capable led control on A21e, A22p, T20-22, X20
  41  *                      experimental temperatures and fan speed
  42  *                      experimental embedded controller register dump
  43  *                      mark more functions as __init, drop incorrect __exit
  44  *                      use MODULE_VERSION
  45  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  46  *                      fix parameter passing on module loading
  47  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  48  *                          thanks to Jim Radford <radford@blackbean.org>
  49  *  2004-11-08  0.8     fix init error case, don't return from a macro
  50  *                          thanks to Chris Wright <chrisw@osdl.org>
  51  *  2004-10-23  0.7     fix module loading on A21e, A22p, T20, T21, X20
  52  *                      fix led control on A21e
  53  *  2004-10-19  0.6     use acpi_bus_register_driver() to claim HKEY device
  54  *  2004-10-18  0.5     thinklight support on A21e, G40, R32, T20, T21, X20
  55  *                      proc file format changed
  56  *                      video_switch command
  57  *                      experimental cmos control
  58  *                      experimental led control
  59  *                      experimental acpi sounds
  60  *  2004-09-16  0.4     support for module parameters
  61  *                      hotkey mask can be prefixed by 0x
  62  *                      video output switching
  63  *                      video expansion control
  64  *                      ultrabay eject support
  65  *                      removed lcd brightness/on/off control, didn't work
  66  *  2004-08-17  0.3     support for R40
  67  *                      lcd off, brightness control
  68  *                      thinklight on/off
  69  *  2004-08-14  0.2     support for T series, X20
  70  *                      bluetooth enable/disable
  71  *                      hotkey events disabled by default
  72  *                      removed fan control, currently useless
  73  *  2004-08-09  0.1     initial release, support for X series
  74  */
  75
  76 #include <linux/kernel.h>
  77 #include <linux/module.h>
  78 #include <linux/init.h>
  79 #include <linux/types.h>
  80 #include <linux/proc_fs.h>
  81 #include <asm/uaccess.h>
  82
  83 #include <acpi/acpi_drivers.h>
  84 #include <acpi/acnamesp.h>
  85
  86 #define IBM_NAME "ibm"
  87 #define IBM_DESC "IBM ThinkPad ACPI Extras"
  88 #define IBM_FILE "ibm_acpi"
  89 #define IBM_URL "http://ibm-acpi.sf.net/"
  90
  91 MODULE_AUTHOR("Borislav Deianov");
  92 MODULE_DESCRIPTION(IBM_DESC);
  93 MODULE_VERSION(IBM_VERSION);
  94 MODULE_LICENSE("GPL");
  95
  96 #define IBM_DIR IBM_NAME
  97
  98 #define IBM_LOG IBM_FILE ": "
  99 #define IBM_ERR    KERN_ERR    IBM_LOG
 100 #define IBM_NOTICE KERN_NOTICE IBM_LOG
 101 #define IBM_INFO   KERN_INFO   IBM_LOG
 102 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG
 103
 104 #define IBM_MAX_ACPI_ARGS 3
 105
 106 #define __unused __attribute__ ((unused))
 107
 108 static int experimental;
 109 module_param(experimental, int, 0);
 110
 111 static acpi_handle root_handle = NULL;
 112
 113 #define IBM_HANDLE(object, parent, paths...)                    \
 114         static acpi_handle  object##_handle;                    \
 115         static acpi_handle *object##_parent = &parent##_handle; \
 116         static char        *object##_path;                      \
 117         static char        *object##_paths[] = { paths }
 118
 119 /*
 120  * The following models are supported to various degrees:
 121  *
 122  * 570, 600e, 600x, 770e, 770x
 123  * A20m, A21e, A21m, A21p, A22p, A30, A30p, A31, A31p
 124  * G40, G41
 125  * R30, R31, R32, R40, R40e, R50, R50e, R50p, R51
 126  * T20, T21, T22, T23, T30, T40, T40p, T41, T41p, T42, T42p, T43
 127  * X20, X21, X22, X23, X24, X30, X31, X40
 128  *
 129  * The following models have no supported features:
 130  *
 131  * 240, 240x, i1400
 132  *
 133  * Still missing DSDTs for the following models:
 134  *
 135  * A20p, A22e, A22m
 136  * R52
 137  * S31
 138  * T43p
 139  */
 140
 141 IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",      /* 240, 240x */
 142            "\\_SB.PCI.ISA.EC",  /* 570 */
 143            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 144            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 145            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 146            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 147            "\\_SB.PCI0.LPC.EC", /* all others */
 148     );
 149
 150 IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",      /* 570 */
 151            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 152            "\\_SB.PCI0.VID0",   /* 770e */
 153            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 154            "\\_SB.PCI0.AGP.VID",        /* all others */
 155     );                          /* R30, R31 */
 156
 157 IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");  /* G41 */
 158
 159 IBM_HANDLE(cmos, root, "\\UCMS",        /* R50, R50e, R50p, R51, T4x, X31, X40 */
 160            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 161            "\\CMS",             /* R40, R40e */
 162     );                          /* all others */
 163
 164 IBM_HANDLE(dock, root, "\\_SB.GDCK",    /* X30, X31, X40 */
 165            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
 166            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
 167            "\\_SB.PCI.ISA.SLCE",        /* 570 */
 168     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
 169
 170 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",        /* 570 */
 171            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
 172            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
 173     );                          /* A21e, R30, R31 */
 174
 175 IBM_HANDLE(bay_ej, bay, "_EJ3", /* 600e/x, A2xm/p, A3x */
 176            "_EJ0",              /* all others */
 177     );                          /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
 178
 179 IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",     /* A3x, R32 */
 180            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
 181     );                          /* all others */
 182
 183 IBM_HANDLE(bay2_ej, bay2, "_EJ3",       /* 600e/x, 770e, A3x */
 184            "_EJ0",              /* 770x */
 185     );                          /* all others */
 186
 187 /* don't list other alternatives as we install a notify handler on the 570 */
 188 IBM_HANDLE(pci, root, "\\_SB.PCI");     /* 570 */
 189
 190 IBM_HANDLE(hkey, ec, "\\_SB.HKEY",      /* 600e/x, 770e, 770x */
 191            "^HKEY",             /* R30, R31 */
 192            "HKEY",              /* all others */
 193     );                          /* 570 */
 194
 195 IBM_HANDLE(lght, root, "\\LGHT");       /* A21e, A2xm/p, T20-22, X20-21 */
 196 IBM_HANDLE(ledb, ec, "LEDB");   /* G4x */
 197
 198 IBM_HANDLE(led, ec, "SLED",     /* 570 */
 199            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 200            "LED",               /* all others */
 201     );                          /* R30, R31 */
 202
 203 IBM_HANDLE(beep, ec, "BEEP");   /* all except R30, R31 */
 204 IBM_HANDLE(ecrd, ec, "ECRD");   /* 570 */
 205 IBM_HANDLE(ecwr, ec, "ECWR");   /* 570 */
 206 IBM_HANDLE(fans, ec, "FANS");   /* X31, X40 */
 207
 208 IBM_HANDLE(gfan, ec, "GFAN",    /* 570 */
 209            "\\FSPD",            /* 600e/x, 770e, 770x */
 210     );                          /* all others */
 211
 212 IBM_HANDLE(sfan, ec, "SFAN",    /* 570 */
 213            "JFNS",              /* 770x-JL */
 214     );                          /* all others */
 215
 216 #define IBM_HKEY_HID    "IBM0068"
 217 #define IBM_PCI_HID     "PNP0A03"
 218
 219 struct ibm_struct {
 220         char *name;
 221         char param[32];
 222
 223         char *hid;
 224         struct acpi_driver *driver;
 225
 226         int (*init) (void);
 227         int (*read) (char *);
 228         int (*write) (char *);
 229         void (*exit) (void);
 230
 231         void (*notify) (struct ibm_struct *, u32);
 232         acpi_handle *handle;
 233         int type;
 234         struct acpi_device *device;
 235
 236         int driver_registered;
 237         int proc_created;
 238         int init_called;
 239         int notify_installed;
 240
 241         int experimental;
 242 };
 243
 244 static struct proc_dir_entry *proc_dir = NULL;
 245
 246 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
 247 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 248 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))
 249
 250 static int acpi_evalf(acpi_handle handle,
 251                       void *res, char *method, char *fmt, ...)
 252 {
 253         char *fmt0 = fmt;
 254         struct acpi_object_list params;
 255         union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
 256         struct acpi_buffer result, *resultp;
 257         union acpi_object out_obj;
 258         acpi_status status;
 259         va_list ap;
 260         char res_type;
 261         int success;
 262         int quiet;
 263
 264         if (!*fmt) {
 265                 printk(IBM_ERR "acpi_evalf() called with empty format\n");
 266                 return 0;
 267         }
 268
 269         if (*fmt == 'q') {
 270                 quiet = 1;
 271                 fmt++;
 272         } else
 273                 quiet = 0;
 274
 275         res_type = *(fmt++);
 276
 277         params.count = 0;
 278         params.pointer = &in_objs[0];
 279
 280         va_start(ap, fmt);
 281         while (*fmt) {
 282                 char c = *(fmt++);
 283                 switch (c) {
 284                 case 'd':       /* int */
 285                         in_objs[params.count].integer.value = va_arg(ap, int);
 286                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 287                         break;
 288                         /* add more types as needed */
 289                 default:
 290                         printk(IBM_ERR "acpi_evalf() called "
 291                                "with invalid format character '%c'\n", c);
 292                         return 0;
 293                 }
 294         }
 295         va_end(ap);
 296
 297         if (res_type != 'v') {
 298                 result.length = sizeof(out_obj);
 299                 result.pointer = &out_obj;
 300                 resultp = &result;
 301         } else
 302                 resultp = NULL;
 303
 304         status = acpi_evaluate_object(handle, method, &params, resultp);
 305
 306         switch (res_type) {
 307         case 'd':               /* int */
 308                 if (res)
 309                         *(int *)res = out_obj.integer.value;
 310                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 311                 break;
 312         case 'v':               /* void */
 313                 success = status == AE_OK;
 314                 break;
 315                 /* add more types as needed */
 316         default:
 317                 printk(IBM_ERR "acpi_evalf() called "
 318                        "with invalid format character '%c'\n", res_type);
 319                 return 0;
 320         }
 321
 322         if (!success && !quiet)
 323                 printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 324                        method, fmt0, status);
 325
 326         return success;
 327 }
 328
 329 static void __unused acpi_print_int(acpi_handle handle, char *method)
 330 {
 331         int i;
 332
 333         if (acpi_evalf(handle, &i, method, "d"))
 334                 printk(IBM_INFO "%s = 0x%x\n", method, i);
 335         else
 336                 printk(IBM_ERR "error calling %s\n", method);
 337 }
 338
 339 static char *next_cmd(char **cmds)
 340 {
 341         char *start = *cmds;
 342         char *end;
 343
 344         while ((end = strchr(start, ',')) && end == start)
 345                 start = end + 1;
 346
 347         if (!end)
 348                 return NULL;
 349
 350         *end = 0;
 351         *cmds = end + 1;
 352         return start;
 353 }
 354
 355 static int driver_init(void)
 356 {
 357         printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
 358         printk(IBM_INFO "%s\n", IBM_URL);
 359
 360         return 0;
 361 }
 362
 363 static int driver_read(char *p)
 364 {
 365         int len = 0;
 366
 367         len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
 368         len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);
 369
 370         return len;
 371 }
 372
 373 static int hotkey_supported;
 374 static int hotkey_mask_supported;
 375 static int hotkey_orig_status;
 376 static int hotkey_orig_mask;
 377
 378 static int hotkey_get(int *status, int *mask)
 379 {
 380         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
 381                 return 0;
 382
 383         if (hotkey_mask_supported)
 384                 if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
 385                         return 0;
 386
 387         return 1;
 388 }
 389
 390 static int hotkey_set(int status, int mask)
 391 {
 392         int i;
 393
 394         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
 395                 return 0;
 396
 397         if (hotkey_mask_supported)
 398                 for (i = 0; i < 32; i++) {
 399                         int bit = ((1 << i) & mask) != 0;
 400                         if (!acpi_evalf(hkey_handle,
 401                                         NULL, "MHKM", "vdd", i + 1, bit))
 402                                 return 0;
 403                 }
 404
 405         return 1;
 406 }
 407
 408 static int hotkey_init(void)
 409 {
 410         /* hotkey not supported on 570 */
 411         hotkey_supported = hkey_handle != NULL;
 412
 413         if (hotkey_supported) {
 414                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 415                    A30, R30, R31, T20-22, X20-21, X22-24 */
 416                 hotkey_mask_supported =
 417                     acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
 418
 419                 if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask))
 420                         return -ENODEV;
 421         }
 422
 423         return 0;
 424 }
 425
 426 static int hotkey_read(char *p)
 427 {
 428         int status, mask;
 429         int len = 0;
 430
 431         if (!hotkey_supported) {
 432                 len += sprintf(p + len, "status:\t\tnot supported\n");
 433                 return len;
 434         }
 435
 436         if (!hotkey_get(&status, &mask))
 437                 return -EIO;
 438
 439         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
 440         if (hotkey_mask_supported) {
 441                 len += sprintf(p + len, "mask:\t\t0x%04x\n", mask);
 442                 len += sprintf(p + len,
 443                                "commands:\tenable, disable, reset, <mask>\n");
 444         } else {
 445                 len += sprintf(p + len, "mask:\t\tnot supported\n");
 446                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
 447         }
 448
 449         return len;
 450 }
 451
 452 static int hotkey_write(char *buf)
 453 {
 454         int status, mask;
 455         char *cmd;
 456         int do_cmd = 0;
 457
 458         if (!hotkey_supported)
 459                 return -ENODEV;
 460
 461         if (!hotkey_get(&status, &mask))
 462                 return -EIO;
 463
 464         while ((cmd = next_cmd(&buf))) {
 465                 if (strlencmp(cmd, "enable") == 0) {
 466                         status = 1;
 467                 } else if (strlencmp(cmd, "disable") == 0) {
 468                         status = 0;
 469                 } else if (strlencmp(cmd, "reset") == 0) {
 470                         status = hotkey_orig_status;
 471                         mask = hotkey_orig_mask;
 472                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
 473                         /* mask set */
 474                 } else if (sscanf(cmd, "%x", &mask) == 1) {
 475                         /* mask set */
 476                 } else
 477                         return -EINVAL;
 478                 do_cmd = 1;
 479         }
 480
 481         if (do_cmd && !hotkey_set(status, mask))
 482                 return -EIO;
 483
 484         return 0;
 485 }
 486
 487 static void hotkey_exit(void)
 488 {
 489         if (hotkey_supported)
 490                 hotkey_set(hotkey_orig_status, hotkey_orig_mask);
 491 }
 492
 493 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 494 {
 495         int hkey;
 496
 497         if (acpi_evalf(hkey_handle, &hkey, "MHKP", "d"))
 498                 acpi_bus_generate_event(ibm->device, event, hkey);
 499         else {
 500                 printk(IBM_ERR "unknown hotkey event %d\n", event);
 501                 acpi_bus_generate_event(ibm->device, event, 0);
 502         }
 503 }
 504
 505 static int bluetooth_supported;
 506
 507 static int bluetooth_init(void)
 508 {
 509         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 510            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
 511         bluetooth_supported = hkey_handle &&
 512             acpi_evalf(hkey_handle, NULL, "GBDC", "qv");
 513
 514         return 0;
 515 }
 516
 517 static int bluetooth_status(void)
 518 {
 519         int status;
 520
 521         if (!bluetooth_supported ||
 522             !acpi_evalf(hkey_handle, &status, "GBDC", "d"))
 523                 status = 0;
 524
 525         return status;
 526 }
 527
 528 static int bluetooth_read(char *p)
 529 {
 530         int len = 0;
 531         int status = bluetooth_status();
 532
 533         if (!bluetooth_supported)
 534                 len += sprintf(p + len, "status:\t\tnot supported\n");
 535         else if (!(status & 1))
 536                 len += sprintf(p + len, "status:\t\tnot installed\n");
 537         else {
 538                 len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
 539                 len += sprintf(p + len, "commands:\tenable, disable\n");
 540         }
 541
 542         return len;
 543 }
 544
 545 static int bluetooth_write(char *buf)
 546 {
 547         int status = bluetooth_status();
 548         char *cmd;
 549         int do_cmd = 0;
 550
 551         if (!bluetooth_supported)
 552                 return -ENODEV;
 553
 554         while ((cmd = next_cmd(&buf))) {
 555                 if (strlencmp(cmd, "enable") == 0) {
 556                         status |= 2;
 557                 } else if (strlencmp(cmd, "disable") == 0) {
 558                         status &= ~2;
 559                 } else
 560                         return -EINVAL;
 561                 do_cmd = 1;
 562         }
 563
 564         if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
 565                 return -EIO;
 566
 567         return 0;
 568 }
 569
 570 static int video_supported;
 571 static int video_orig_autosw;
 572
 573 #define VIDEO_570 1
 574 #define VIDEO_770 2
 575 #define VIDEO_NEW 3
 576
 577 static int video_init(void)
 578 {
 579         int ivga;
 580
 581         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
 582                 /* G41, assume IVGA doesn't change */
 583                 vid_handle = vid2_handle;
 584
 585         if (!vid_handle)
 586                 /* video switching not supported on R30, R31 */
 587                 video_supported = 0;
 588         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
 589                 /* 570 */
 590                 video_supported = VIDEO_570;
 591         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
 592                 /* 600e/x, 770e, 770x */
 593                 video_supported = VIDEO_770;
 594         else
 595                 /* all others */
 596                 video_supported = VIDEO_NEW;
 597
 598         return 0;
 599 }
 600
 601 static int video_status(void)
 602 {
 603         int status = 0;
 604         int i;
 605
 606         if (video_supported == VIDEO_570) {
 607                 if (acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 0x87))
 608                         status = i & 3;
 609         } else if (video_supported == VIDEO_770) {
 610                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 611                         status |= 0x01 * i;
 612                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 613                         status |= 0x02 * i;
 614         } else if (video_supported == VIDEO_NEW) {
 615                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1);
 616                 if (acpi_evalf(NULL, &i, "\\VCDC", "d"))
 617                         status |= 0x02 * i;
 618
 619                 acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0);
 620                 if (acpi_evalf(NULL, &i, "\\VCDL", "d"))
 621                         status |= 0x01 * i;
 622                 if (acpi_evalf(NULL, &i, "\\VCDD", "d"))
 623                         status |= 0x08 * i;
 624         }
 625
 626         return status;
 627 }
 628
 629 static int video_autosw(void)
 630 {
 631         int autosw = 0;
 632
 633         if (video_supported == VIDEO_570)
 634                 acpi_evalf(vid_handle, &autosw, "SWIT", "d");
 635         else if (video_supported == VIDEO_770 || video_supported == VIDEO_NEW)
 636                 acpi_evalf(vid_handle, &autosw, "^VDEE", "d");
 637
 638         return autosw & 1;
 639 }
 640
 641 static int video_read(char *p)
 642 {
 643         int status = video_status();
 644         int autosw = video_autosw();
 645         int len = 0;
 646
 647         if (!video_supported) {
 648                 len += sprintf(p + len, "status:\t\tnot supported\n");
 649                 return len;
 650         }
 651
 652         len += sprintf(p + len, "status:\t\tsupported\n");
 653         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
 654         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
 655         if (video_supported == VIDEO_NEW)
 656                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
 657         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
 658         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
 659         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
 660         if (video_supported == VIDEO_NEW)
 661                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
 662         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
 663         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
 664
 665         return len;
 666 }
 667
 668 static int video_switch(void)
 669 {
 670         int autosw = video_autosw();
 671         int ret;
 672
 673         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 674                 return -EIO;
 675         ret = video_supported == VIDEO_570 ?
 676             acpi_evalf(ec_handle, NULL, "_Q16", "v") :
 677             acpi_evalf(vid_handle, NULL, "VSWT", "v");
 678         acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 679
 680         return ret;
 681 }
 682
 683 static int video_expand(void)
 684 {
 685         if (video_supported == VIDEO_570)
 686                 return acpi_evalf(ec_handle, NULL, "_Q17", "v");
 687         else if (video_supported == VIDEO_770)
 688                 return acpi_evalf(vid_handle, NULL, "VEXP", "v");
 689         else
 690                 return acpi_evalf(NULL, NULL, "\\VEXP", "v");
 691 }
 692
 693 static int video_switch2(int status)
 694 {
 695         int ret;
 696
 697         if (video_supported == VIDEO_570) {
 698                 ret = acpi_evalf(NULL, NULL,
 699                                  "\\_SB.PHS2", "vdd", 0x8b, status | 0x80);
 700         } else if (video_supported == VIDEO_770) {
 701                 int autosw = video_autosw();
 702                 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 703                         return -EIO;
 704
 705                 ret = acpi_evalf(vid_handle, NULL,
 706                                  "ASWT", "vdd", status * 0x100, 0);
 707
 708                 acpi_evalf(vid_handle, NULL, "_DOS", "vd", autosw);
 709         } else {
 710                 ret = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
 711                     acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
 712         }
 713
 714         return ret;
 715 }
 716
 717 static int video_write(char *buf)
 718 {
 719         char *cmd;
 720         int enable, disable, status;
 721
 722         if (!video_supported)
 723                 return -ENODEV;
 724
 725         enable = disable = 0;
 726
 727         while ((cmd = next_cmd(&buf))) {
 728                 if (strlencmp(cmd, "lcd_enable") == 0) {
 729                         enable |= 0x01;
 730                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
 731                         disable |= 0x01;
 732                 } else if (strlencmp(cmd, "crt_enable") == 0) {
 733                         enable |= 0x02;
 734                 } else if (strlencmp(cmd, "crt_disable") == 0) {
 735                         disable |= 0x02;
 736                 } else if (video_supported == VIDEO_NEW &&
 737                            strlencmp(cmd, "dvi_enable") == 0) {
 738                         enable |= 0x08;
 739                 } else if (video_supported == VIDEO_NEW &&
 740                            strlencmp(cmd, "dvi_disable") == 0) {
 741                         disable |= 0x08;
 742                 } else if (strlencmp(cmd, "auto_enable") == 0) {
 743                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 1))
 744                                 return -EIO;
 745                 } else if (strlencmp(cmd, "auto_disable") == 0) {
 746                         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", 0))
 747                                 return -EIO;
 748                 } else if (strlencmp(cmd, "video_switch") == 0) {
 749                         if (!video_switch())
 750                                 return -EIO;
 751                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
 752                         if (!video_expand())
 753                                 return -EIO;
 754                 } else
 755                         return -EINVAL;
 756         }
 757
 758         if (enable || disable) {
 759                 status = (video_status() & 0x0f & ~disable) | enable;
 760                 if (!video_switch2(status))
 761                         return -EIO;
 762         }
 763
 764         return 0;
 765 }
 766
 767 static void video_exit(void)
 768 {
 769         acpi_evalf(vid_handle, NULL, "_DOS", "vd", video_orig_autosw);
 770 }
 771
 772 static int light_supported;
 773 static int light_status_supported;
 774
 775 static int light_init(void)
 776 {
 777         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
 778         light_supported = (cmos_handle || lght_handle) && !ledb_handle;
 779
 780         if (light_supported)
 781                 /* light status not supported on
 782                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
 783                 light_status_supported = acpi_evalf(ec_handle, NULL,
 784                                                     "KBLT", "qv");
 785
 786         return 0;
 787 }
 788
 789 static int light_read(char *p)
 790 {
 791         int len = 0;
 792         int status = 0;
 793
 794         if (!light_supported) {
 795                 len += sprintf(p + len, "status:\t\tnot supported\n");
 796         } else if (!light_status_supported) {
 797                 len += sprintf(p + len, "status:\t\tunknown\n");
 798                 len += sprintf(p + len, "commands:\ton, off\n");
 799         } else {
 800                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
 801                         return -EIO;
 802                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
 803                 len += sprintf(p + len, "commands:\ton, off\n");
 804         }
 805
 806         return len;
 807 }
 808
 809 static int light_write(char *buf)
 810 {
 811         int cmos_cmd, lght_cmd;
 812         char *cmd;
 813         int success;
 814
 815         if (!light_supported)
 816                 return -ENODEV;
 817
 818         while ((cmd = next_cmd(&buf))) {
 819                 if (strlencmp(cmd, "on") == 0) {
 820                         cmos_cmd = 0x0c;
 821                         lght_cmd = 1;
 822                 } else if (strlencmp(cmd, "off") == 0) {
 823                         cmos_cmd = 0x0d;
 824                         lght_cmd = 0;
 825                 } else
 826                         return -EINVAL;
 827
 828                 success = cmos_handle ?
 829                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
 830                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
 831                 if (!success)
 832                         return -EIO;
 833         }
 834
 835         return 0;
 836 }
 837
 838 static int _sta(acpi_handle handle)
 839 {
 840         int status;
 841
 842         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 843                 status = 0;
 844
 845         return status;
 846 }
 847
 848 #define dock_docked() (_sta(dock_handle) & 1)
 849
 850 static int dock_read(char *p)
 851 {
 852         int len = 0;
 853         int docked = dock_docked();
 854
 855         if (!dock_handle)
 856                 len += sprintf(p + len, "status:\t\tnot supported\n");
 857         else if (!docked)
 858                 len += sprintf(p + len, "status:\t\tundocked\n");
 859         else {
 860                 len += sprintf(p + len, "status:\t\tdocked\n");
 861                 len += sprintf(p + len, "commands:\tdock, undock\n");
 862         }
 863
 864         return len;
 865 }
 866
 867 static int dock_write(char *buf)
 868 {
 869         char *cmd;
 870
 871         if (!dock_docked())
 872                 return -ENODEV;
 873
 874         while ((cmd = next_cmd(&buf))) {
 875                 if (strlencmp(cmd, "undock") == 0) {
 876                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
 877                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
 878                                 return -EIO;
 879                 } else if (strlencmp(cmd, "dock") == 0) {
 880                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
 881                                 return -EIO;
 882                 } else
 883                         return -EINVAL;
 884         }
 885
 886         return 0;
 887 }
 888
 889 static void dock_notify(struct ibm_struct *ibm, u32 event)
 890 {
 891         int docked = dock_docked();
 892         int pci = ibm->hid && strstr(ibm->hid, IBM_PCI_HID);
 893
 894         if (event == 1 && !pci) /* 570 */
 895                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
 896         else if (event == 1 && pci)     /* 570 */
 897                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
 898         else if (event == 3 && docked)
 899                 acpi_bus_generate_event(ibm->device, event, 1); /* button */
 900         else if (event == 3 && !docked)
 901                 acpi_bus_generate_event(ibm->device, event, 2); /* undock */
 902         else if (event == 0 && docked)
 903                 acpi_bus_generate_event(ibm->device, event, 3); /* dock */
 904         else {
 905                 printk(IBM_ERR "unknown dock event %d, status %d\n",
 906                        event, _sta(dock_handle));
 907                 acpi_bus_generate_event(ibm->device, event, 0); /* unknown */
 908         }
 909 }
 910
 911 static int bay_status_supported;
 912 static int bay_status2_supported;
 913 static int bay_eject_supported;
 914 static int bay_eject2_supported;
 915
 916 static int bay_init(void)
 917 {
 918         bay_status_supported = bay_handle &&
 919             acpi_evalf(bay_handle, NULL, "_STA", "qv");
 920         bay_status2_supported = bay2_handle &&
 921             acpi_evalf(bay2_handle, NULL, "_STA", "qv");
 922
 923         bay_eject_supported = bay_handle && bay_ej_handle &&
 924             (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
 925         bay_eject2_supported = bay2_handle && bay2_ej_handle &&
 926             (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
 927
 928         return 0;
 929 }
 930
 931 #define bay_occupied(b) (_sta(b##_handle) & 1)
 932
 933 static int bay_read(char *p)
 934 {
 935         int len = 0;
 936         int occupied = bay_occupied(bay);
 937         int occupied2 = bay_occupied(bay2);
 938         int eject, eject2;
 939
 940         len += sprintf(p + len, "status:\t\t%s\n", bay_status_supported ?
 941                        (occupied ? "occupied" : "unoccupied") :
 942                        "not supported");
 943         if (bay_status2_supported)
 944                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
 945                                "occupied" : "unoccupied");
 946
 947         eject = bay_eject_supported && occupied;
 948         eject2 = bay_eject2_supported && occupied2;
 949
 950         if (eject && eject2)
 951                 len += sprintf(p + len, "commands:\teject, eject2\n");
 952         else if (eject)
 953                 len += sprintf(p + len, "commands:\teject\n");
 954         else if (eject2)
 955                 len += sprintf(p + len, "commands:\teject2\n");
 956
 957         return len;
 958 }
 959
 960 static int bay_write(char *buf)
 961 {
 962         char *cmd;
 963
 964         if (!bay_eject_supported && !bay_eject2_supported)
 965                 return -ENODEV;
 966
 967         while ((cmd = next_cmd(&buf))) {
 968                 if (bay_eject_supported && strlencmp(cmd, "eject") == 0) {
 969                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
 970                                 return -EIO;
 971                 } else if (bay_eject2_supported &&
 972                            strlencmp(cmd, "eject2") == 0) {
 973                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
 974                                 return -EIO;
 975                 } else
 976                         return -EINVAL;
 977         }
 978
 979         return 0;
 980 }
 981
 982 static void bay_notify(struct ibm_struct *ibm, u32 event)
 983 {
 984         acpi_bus_generate_event(ibm->device, event, 0);
 985 }
 986
 987 static int cmos_read(char *p)
 988 {
 989         int len = 0;
 990
 991         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
 992            R30, R31, T20-22, X20-21 */
 993         if (!cmos_handle)
 994                 len += sprintf(p + len, "status:\t\tnot supported\n");
 995         else {
 996                 len += sprintf(p + len, "status:\t\tsupported\n");
 997                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
 998         }
 999
1000         return len;
1001 }
1002
1003 static int cmos_eval(int cmos_cmd)
1004 {
1005         if (cmos_handle)
1006                 return acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd);
1007         else
1008                 return 1;
1009 }
1010
1011 static int cmos_write(char *buf)
1012 {
1013         char *cmd;
1014         int cmos_cmd;
1015
1016         if (!cmos_handle)
1017                 return -EINVAL;
1018
1019         while ((cmd = next_cmd(&buf))) {
1020                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
1021                     cmos_cmd >= 0 && cmos_cmd <= 21) {
1022                         /* cmos_cmd set */
1023                 } else
1024                         return -EINVAL;
1025
1026                 if (!cmos_eval(cmos_cmd))
1027                         return -EIO;
1028         }
1029
1030         return 0;
1031 }
1032
1033 static int led_supported;
1034
1035 #define LED_570 1
1036 #define LED_OLD 2
1037 #define LED_NEW 3
1038
1039 static int led_init(void)
1040 {
1041         if (!led_handle)
1042                 /* led not supported on R30, R31 */
1043                 led_supported = 0;
1044         else if (strlencmp(led_path, "SLED") == 0)
1045                 /* 570 */
1046                 led_supported = LED_570;
1047         else if (strlencmp(led_path, "SYSL") == 0)
1048                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
1049                 led_supported = LED_OLD;
1050         else
1051                 /* all others */
1052                 led_supported = LED_NEW;
1053
1054         return 0;
1055 }
1056
1057 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
1058
1059 static int led_read(char *p)
1060 {
1061         int len = 0;
1062
1063         if (!led_supported) {
1064                 len += sprintf(p + len, "status:\t\tnot supported\n");
1065                 return len;
1066         }
1067         len += sprintf(p + len, "status:\t\tsupported\n");
1068
1069         if (led_supported == LED_570) {
1070                 /* 570 */
1071                 int i, status;
1072                 for (i = 0; i < 8; i++) {
1073                         if (!acpi_evalf(ec_handle,
1074                                         &status, "GLED", "dd", 1 << i))
1075                                 return -EIO;
1076                         len += sprintf(p + len, "%d:\t\t%s\n",
1077                                        i, led_status(status));
1078                 }
1079         }
1080
1081         len += sprintf(p + len, "commands:\t"
1082                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
1083
1084         return len;
1085 }
1086
1087 /* off, on, blink */
1088 static const int led_sled_arg1[] = { 0, 1, 3 };
1089 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
1090 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
1091 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
1092
1093 #define EC_HLCL 0x0c
1094 #define EC_HLBL 0x0d
1095 #define EC_HLMS 0x0e
1096
1097 static int led_write(char *buf)
1098 {
1099         char *cmd;
1100         int led, ind, ret;
1101
1102         if (!led_supported)
1103                 return -ENODEV;
1104
1105         while ((cmd = next_cmd(&buf))) {
1106                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
1107                         return -EINVAL;
1108
1109                 if (strstr(cmd, "off")) {
1110                         ind = 0;
1111                 } else if (strstr(cmd, "on")) {
1112                         ind = 1;
1113                 } else if (strstr(cmd, "blink")) {
1114                         ind = 2;
1115                 } else
1116                         return -EINVAL;
1117
1118                 if (led_supported == LED_570) {
1119                         /* 570 */
1120                         led = 1 << led;
1121                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1122                                         led, led_sled_arg1[ind]))
1123                                 return -EIO;
1124                 } else if (led_supported == LED_OLD) {
1125                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
1126                         led = 1 << led;
1127                         ret = ec_write(EC_HLMS, led);
1128                         if (ret >= 0)
1129                                 ret =
1130                                     ec_write(EC_HLBL, led * led_exp_hlbl[ind]);
1131                         if (ret >= 0)
1132                                 ret =
1133                                     ec_write(EC_HLCL, led * led_exp_hlcl[ind]);
1134                         if (ret < 0)
1135                                 return ret;
1136                 } else {
1137                         /* all others */
1138                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
1139                                         led, led_led_arg1[ind]))
1140                                 return -EIO;
1141                 }
1142         }
1143
1144         return 0;
1145 }
1146
1147 static int beep_read(char *p)
1148 {
1149         int len = 0;
1150
1151         if (!beep_handle)
1152                 len += sprintf(p + len, "status:\t\tnot supported\n");
1153         else {
1154                 len += sprintf(p + len, "status:\t\tsupported\n");
1155                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
1156         }
1157
1158         return len;
1159 }
1160
1161 static int beep_write(char *buf)
1162 {
1163         char *cmd;
1164         int beep_cmd;
1165
1166         if (!beep_handle)
1167                 return -ENODEV;
1168
1169         while ((cmd = next_cmd(&buf))) {
1170                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
1171                     beep_cmd >= 0 && beep_cmd <= 17) {
1172                         /* beep_cmd set */
1173                 } else
1174                         return -EINVAL;
1175                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
1176                         return -EIO;
1177         }
1178
1179         return 0;
1180 }
1181
1182 static int acpi_ec_read(int i, u8 * p)
1183 {
1184         int v;
1185
1186         if (ecrd_handle) {
1187                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
1188                         return 0;
1189                 *p = v;
1190         } else {
1191                 if (ec_read(i, p) < 0)
1192                         return 0;
1193         }
1194
1195         return 1;
1196 }
1197
1198 static int acpi_ec_write(int i, u8 v)
1199 {
1200         if (ecwr_handle) {
1201                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
1202                         return 0;
1203         } else {
1204                 if (ec_write(i, v) < 0)
1205                         return 0;
1206         }
1207
1208         return 1;
1209 }
1210
1211 static int thermal_tmp_supported;
1212 static int thermal_updt_supported;
1213
1214 static int thermal_init(void)
1215 {
1216         /* temperatures not supported on 570, G4x, R30, R31, R32 */
1217         thermal_tmp_supported = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
1218
1219         /* 600e/x, 770e, 770x */
1220         thermal_updt_supported = acpi_evalf(ec_handle, NULL, "UPDT", "qv");
1221
1222         return 0;
1223 }
1224
1225 static int thermal_read(char *p)
1226 {
1227         int len = 0;
1228
1229         if (!thermal_tmp_supported)
1230                 len += sprintf(p + len, "temperatures:\tnot supported\n");
1231         else {
1232                 int i, t;
1233                 char tmpi[] = "TMPi";
1234                 s8 tmp[8];
1235
1236                 if (thermal_updt_supported)
1237                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
1238                                 return -EIO;
1239
1240                 for (i = 0; i < 8; i++) {
1241                         tmpi[3] = '0' + i;
1242                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
1243                                 return -EIO;
1244                         if (thermal_updt_supported)
1245                                 tmp[i] = (t - 2732 + 5) / 10;
1246                         else
1247                                 tmp[i] = t;
1248                 }
1249
1250                 len += sprintf(p + len,
1251                                "temperatures:\t%d %d %d %d %d %d %d %d\n",
1252                                tmp[0], tmp[1], tmp[2], tmp[3],
1253                                tmp[4], tmp[5], tmp[6], tmp[7]);
1254         }
1255
1256         return len;
1257 }
1258
1259 static u8 ecdump_regs[256];
1260
1261 static int ecdump_read(char *p)
1262 {
1263         int len = 0;
1264         int i, j;
1265         u8 v;
1266
1267         len += sprintf(p + len, "EC      "
1268                        " +00 +01 +02 +03 +04 +05 +06 +07"
1269                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
1270         for (i = 0; i < 256; i += 16) {
1271                 len += sprintf(p + len, "EC 0x%02x:", i);
1272                 for (j = 0; j < 16; j++) {
1273                         if (!acpi_ec_read(i + j, &v))
1274                                 break;
1275                         if (v != ecdump_regs[i + j])
1276                                 len += sprintf(p + len, " *%02x", v);
1277                         else
1278                                 len += sprintf(p + len, "  %02x", v);
1279                         ecdump_regs[i + j] = v;
1280                 }
1281                 len += sprintf(p + len, "\n");
1282                 if (j != 16)
1283                         break;
1284         }
1285
1286         /* These are way too dangerous to advertise openly... */
1287 #if 0
1288         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
1289                        " (<offset> is 00-ff, <value> is 00-ff)\n");
1290         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
1291                        " (<offset> is 00-ff, <value> is 0-255)\n");
1292 #endif
1293         return len;
1294 }
1295
1296 static int ecdump_write(char *buf)
1297 {
1298         char *cmd;
1299         int i, v;
1300
1301         while ((cmd = next_cmd(&buf))) {
1302                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
1303                         /* i and v set */
1304                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
1305                         /* i and v set */
1306                 } else
1307                         return -EINVAL;
1308                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
1309                         if (!acpi_ec_write(i, v))
1310                                 return -EIO;
1311                 } else
1312                         return -EINVAL;
1313         }
1314
1315         return 0;
1316 }
1317
1318 static int brightness_offset = 0x31;
1319
1320 static int brightness_read(char *p)
1321 {
1322         int len = 0;
1323         u8 level;
1324
1325         if (!acpi_ec_read(brightness_offset, &level)) {
1326                 len += sprintf(p + len, "level:\t\tunreadable\n");
1327         } else {
1328                 len += sprintf(p + len, "level:\t\t%d\n", level & 0x7);
1329                 len += sprintf(p + len, "commands:\tup, down\n");
1330                 len += sprintf(p + len, "commands:\tlevel <level>"
1331                                " (<level> is 0-7)\n");
1332         }
1333
1334         return len;
1335 }
1336
1337 #define BRIGHTNESS_UP   4
1338 #define BRIGHTNESS_DOWN 5
1339
1340 static int brightness_write(char *buf)
1341 {
1342         int cmos_cmd, inc, i;
1343         u8 level;
1344         int new_level;
1345         char *cmd;
1346
1347         while ((cmd = next_cmd(&buf))) {
1348                 if (!acpi_ec_read(brightness_offset, &level))
1349                         return -EIO;
1350                 level &= 7;
1351
1352                 if (strlencmp(cmd, "up") == 0) {
1353                         new_level = level == 7 ? 7 : level + 1;
1354                 } else if (strlencmp(cmd, "down") == 0) {
1355                         new_level = level == 0 ? 0 : level - 1;
1356                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1357                            new_level >= 0 && new_level <= 7) {
1358                         /* new_level set */
1359                 } else
1360                         return -EINVAL;
1361
1362                 cmos_cmd = new_level > level ? BRIGHTNESS_UP : BRIGHTNESS_DOWN;
1363                 inc = new_level > level ? 1 : -1;
1364                 for (i = level; i != new_level; i += inc) {
1365                         if (!cmos_eval(cmos_cmd))
1366                                 return -EIO;
1367                         if (!acpi_ec_write(brightness_offset, i + inc))
1368                                 return -EIO;
1369                 }
1370         }
1371
1372         return 0;
1373 }
1374
1375 static int volume_offset = 0x30;
1376
1377 static int volume_read(char *p)
1378 {
1379         int len = 0;
1380         u8 level;
1381
1382         if (!acpi_ec_read(volume_offset, &level)) {
1383                 len += sprintf(p + len, "level:\t\tunreadable\n");
1384         } else {
1385                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
1386                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
1387                 len += sprintf(p + len, "commands:\tup, down, mute\n");
1388                 len += sprintf(p + len, "commands:\tlevel <level>"
1389                                " (<level> is 0-15)\n");
1390         }
1391
1392         return len;
1393 }
1394
1395 #define VOLUME_DOWN     0
1396 #define VOLUME_UP       1
1397 #define VOLUME_MUTE     2
1398
1399 static int volume_write(char *buf)
1400 {
1401         int cmos_cmd, inc, i;
1402         u8 level, mute;
1403         int new_level, new_mute;
1404         char *cmd;
1405
1406         while ((cmd = next_cmd(&buf))) {
1407                 if (!acpi_ec_read(volume_offset, &level))
1408                         return -EIO;
1409                 new_mute = mute = level & 0x40;
1410                 new_level = level = level & 0xf;
1411
1412                 if (strlencmp(cmd, "up") == 0) {
1413                         if (mute)
1414                                 new_mute = 0;
1415                         else
1416                                 new_level = level == 15 ? 15 : level + 1;
1417                 } else if (strlencmp(cmd, "down") == 0) {
1418                         if (mute)
1419                                 new_mute = 0;
1420                         else
1421                                 new_level = level == 0 ? 0 : level - 1;
1422                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
1423                            new_level >= 0 && new_level <= 15) {
1424                         /* new_level set */
1425                 } else if (strlencmp(cmd, "mute") == 0) {
1426                         new_mute = 0x40;
1427                 } else
1428                         return -EINVAL;
1429
1430                 if (new_level != level) {       /* mute doesn't change */
1431                         cmos_cmd = new_level > level ? VOLUME_UP : VOLUME_DOWN;
1432                         inc = new_level > level ? 1 : -1;
1433
1434                         if (mute && (!cmos_eval(cmos_cmd) ||
1435                                      !acpi_ec_write(volume_offset, level)))
1436                                 return -EIO;
1437
1438                         for (i = level; i != new_level; i += inc)
1439                                 if (!cmos_eval(cmos_cmd) ||
1440                                     !acpi_ec_write(volume_offset, i + inc))
1441                                         return -EIO;
1442
1443                         if (mute && (!cmos_eval(VOLUME_MUTE) ||
1444                                      !acpi_ec_write(volume_offset,
1445                                                     new_level + mute)))
1446                                 return -EIO;
1447                 }
1448
1449                 if (new_mute != mute) { /* level doesn't change */
1450                         cmos_cmd = new_mute ? VOLUME_MUTE : VOLUME_UP;
1451
1452                         if (!cmos_eval(cmos_cmd) ||
1453                             !acpi_ec_write(volume_offset, level + new_mute))
1454                                 return -EIO;
1455                 }
1456         }
1457
1458         return 0;
1459 }
1460
1461 static int fan_status_offset = 0x2f;
1462 static int fan_rpm_offset = 0x84;
1463
1464 static int fan_read(char *p)
1465 {
1466         int len = 0;
1467         int s;
1468         u8 lo, hi, status;
1469
1470         if (gfan_handle) {
1471                 /* 570, 600e/x, 770e, 770x */
1472                 if (!acpi_evalf(gfan_handle, &s, NULL, "d"))
1473                         return -EIO;
1474
1475                 len += sprintf(p + len, "level:\t\t%d\n", s);
1476         } else {
1477                 /* all except 570, 600e/x, 770e, 770x */
1478                 if (!acpi_ec_read(fan_status_offset, &status))
1479                         len += sprintf(p + len, "status:\t\tunreadable\n");
1480                 else
1481                         len += sprintf(p + len, "status:\t\t%s\n",
1482                                        enabled(status, 7));
1483
1484                 if (!acpi_ec_read(fan_rpm_offset, &lo) ||
1485                     !acpi_ec_read(fan_rpm_offset + 1, &hi))
1486                         len += sprintf(p + len, "speed:\t\tunreadable\n");
1487                 else
1488                         len += sprintf(p + len, "speed:\t\t%d\n",
1489                                        (hi << 8) + lo);
1490         }
1491
1492         if (sfan_handle)
1493                 /* 570, 770x-JL */
1494                 len += sprintf(p + len, "commands:\tlevel <level>"
1495                                " (<level> is 0-7)\n");
1496         if (!gfan_handle)
1497                 /* all except 570, 600e/x, 770e, 770x */
1498                 len += sprintf(p + len, "commands:\tenable, disable\n");
1499         if (fans_handle)
1500                 /* X31, X40 */
1501                 len += sprintf(p + len, "commands:\tspeed <speed>"
1502                                " (<speed> is 0-65535)\n");
1503
1504         return len;
1505 }
1506
1507 static int fan_write(char *buf)
1508 {
1509         char *cmd;
1510         int level, speed;
1511
1512         while ((cmd = next_cmd(&buf))) {
1513                 if (sfan_handle &&
1514                     sscanf(cmd, "level %d", &level) == 1 &&
1515                     level >= 0 && level <= 7) {
1516                         /* 570, 770x-JL */
1517                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
1518                                 return -EIO;
1519                 } else if (!gfan_handle && strlencmp(cmd, "enable") == 0) {
1520                         /* all except 570, 600e/x, 770e, 770x */
1521                         if (!acpi_ec_write(fan_status_offset, 0x80))
1522                                 return -EIO;
1523                 } else if (!gfan_handle && strlencmp(cmd, "disable") == 0) {
1524                         /* all except 570, 600e/x, 770e, 770x */
1525                         if (!acpi_ec_write(fan_status_offset, 0x00))
1526                                 return -EIO;
1527                 } else if (fans_handle &&
1528                            sscanf(cmd, "speed %d", &speed) == 1 &&
1529                            speed >= 0 && speed <= 65535) {
1530                         /* X31, X40 */
1531                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
1532                                         speed, speed, speed))
1533                                 return -EIO;
1534                 } else
1535                         return -EINVAL;
1536         }
1537
1538         return 0;
1539 }
1540
1541 static struct ibm_struct ibms[] = {
1542         {
1543          .name = "driver",
1544          .init = driver_init,
1545          .read = driver_read,
1546          },
1547         {
1548          .name = "hotkey",
1549          .hid = IBM_HKEY_HID,
1550          .init = hotkey_init,
1551          .read = hotkey_read,
1552          .write = hotkey_write,
1553          .exit = hotkey_exit,
1554          .notify = hotkey_notify,
1555          .handle = &hkey_handle,
1556          .type = ACPI_DEVICE_NOTIFY,
1557          },
1558         {
1559          .name = "bluetooth",
1560          .init = bluetooth_init,
1561          .read = bluetooth_read,
1562          .write = bluetooth_write,
1563          },
1564         {
1565          .name = "video",
1566          .init = video_init,
1567          .read = video_read,
1568          .write = video_write,
1569          .exit = video_exit,
1570          },
1571         {
1572          .name = "light",
1573          .init = light_init,
1574          .read = light_read,
1575          .write = light_write,
1576          },
1577         {
1578          .name = "dock",
1579          .read = dock_read,
1580          .write = dock_write,
1581          .notify = dock_notify,
1582          .handle = &dock_handle,
1583          .type = ACPI_SYSTEM_NOTIFY,
1584          },
1585         {
1586          .name = "dock",
1587          .hid = IBM_PCI_HID,
1588          .notify = dock_notify,
1589          .handle = &pci_handle,
1590          .type = ACPI_SYSTEM_NOTIFY,
1591          },
1592         {
1593          .name = "bay",
1594          .init = bay_init,
1595          .read = bay_read,
1596          .write = bay_write,
1597          .notify = bay_notify,
1598          .handle = &bay_handle,
1599          .type = ACPI_SYSTEM_NOTIFY,
1600          },
1601         {
1602          .name = "cmos",
1603          .read = cmos_read,
1604          .write = cmos_write,
1605          },
1606         {
1607          .name = "led",
1608          .init = led_init,
1609          .read = led_read,
1610          .write = led_write,
1611          },
1612         {
1613          .name = "beep",
1614          .read = beep_read,
1615          .write = beep_write,
1616          },
1617         {
1618          .name = "thermal",
1619          .init = thermal_init,
1620          .read = thermal_read,
1621          },
1622         {
1623          .name = "ecdump",
1624          .read = ecdump_read,
1625          .write = ecdump_write,
1626          .experimental = 1,
1627          },
1628         {
1629          .name = "brightness",
1630          .read = brightness_read,
1631          .write = brightness_write,
1632          .experimental = 1,
1633          },
1634         {
1635          .name = "volume",
1636          .read = volume_read,
1637          .write = volume_write,
1638          .experimental = 1,
1639          },
1640         {
1641          .name = "fan",
1642          .read = fan_read,
1643          .write = fan_write,
1644          .experimental = 1,
1645          },
1646 };
1647
1648 static int dispatch_read(char *page, char **start, off_t off, int count,
1649                          int *eof, void *data)
1650 {
1651         struct ibm_struct *ibm = (struct ibm_struct *)data;
1652         int len;
1653
1654         if (!ibm || !ibm->read)
1655                 return -EINVAL;
1656
1657         len = ibm->read(page);
1658         if (len < 0)
1659                 return len;
1660
1661         if (len <= off + count)
1662                 *eof = 1;
1663         *start = page + off;
1664         len -= off;
1665         if (len > count)
1666                 len = count;
1667         if (len < 0)
1668                 len = 0;
1669
1670         return len;
1671 }
1672
1673 static int dispatch_write(struct file *file, const char __user * userbuf,
1674                           unsigned long count, void *data)
1675 {
1676         struct ibm_struct *ibm = (struct ibm_struct *)data;
1677         char *kernbuf;
1678         int ret;
1679
1680         if (!ibm || !ibm->write)
1681                 return -EINVAL;
1682
1683         kernbuf = kmalloc(count + 2, GFP_KERNEL);
1684         if (!kernbuf)
1685                 return -ENOMEM;
1686
1687         if (copy_from_user(kernbuf, userbuf, count)) {
1688                 kfree(kernbuf);
1689                 return -EFAULT;
1690         }
1691
1692         kernbuf[count] = 0;
1693         strcat(kernbuf, ",");
1694         ret = ibm->write(kernbuf);
1695         if (ret == 0)
1696                 ret = count;
1697
1698         kfree(kernbuf);
1699
1700         return ret;
1701 }
1702
1703 static void dispatch_notify(acpi_handle handle, u32 event, void *data)
1704 {
1705         struct ibm_struct *ibm = (struct ibm_struct *)data;
1706
1707         if (!ibm || !ibm->notify)
1708                 return;
1709
1710         ibm->notify(ibm, event);
1711 }
1712
1713 static int __init setup_notify(struct ibm_struct *ibm)
1714 {
1715         acpi_status status;
1716         int ret;
1717
1718         if (!*ibm->handle)
1719                 return 0;
1720
1721         ret = acpi_bus_get_device(*ibm->handle, &ibm->device);
1722         if (ret < 0) {
1723                 printk(IBM_ERR "%s device not present\n", ibm->name);
1724                 return 0;
1725         }
1726
1727         acpi_driver_data(ibm->device) = ibm;
1728         sprintf(acpi_device_class(ibm->device), "%s/%s", IBM_NAME, ibm->name);
1729
1730         status = acpi_install_notify_handler(*ibm->handle, ibm->type,
1731                                              dispatch_notify, ibm);
1732         if (ACPI_FAILURE(status)) {
1733                 printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
1734                        ibm->name, status);
1735                 return -ENODEV;
1736         }
1737
1738         return 0;
1739 }
1740
1741 static int __init ibm_device_add(struct acpi_device *device)
1742 {
1743         return 0;
1744 }
1745
1746 static int __init register_driver(struct ibm_struct *ibm)
1747 {
1748         int ret;
1749
1750         ibm->driver = kmalloc(sizeof(struct acpi_driver), GFP_KERNEL);
1751         if (!ibm->driver) {
1752                 printk(IBM_ERR "kmalloc(ibm->driver) failed\n");
1753                 return -1;
1754         }
1755
1756         memset(ibm->driver, 0, sizeof(struct acpi_driver));
1757         sprintf(ibm->driver->name, "%s/%s", IBM_NAME, ibm->name);
1758         ibm->driver->ids = ibm->hid;
1759         ibm->driver->ops.add = &ibm_device_add;
1760
1761         ret = acpi_bus_register_driver(ibm->driver);
1762         if (ret < 0) {
1763                 printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
1764                        ibm->hid, ret);
1765                 kfree(ibm->driver);
1766         }
1767
1768         return ret;
1769 }
1770
1771 static int __init ibm_init(struct ibm_struct *ibm)
1772 {
1773         int ret;
1774         struct proc_dir_entry *entry;
1775
1776         if (ibm->experimental && !experimental)
1777                 return 0;
1778
1779         if (ibm->hid) {
1780                 ret = register_driver(ibm);
1781                 if (ret < 0)
1782                         return ret;
1783                 ibm->driver_registered = 1;
1784         }
1785
1786         if (ibm->init) {
1787                 ret = ibm->init();
1788                 if (ret != 0)
1789                         return ret;
1790                 ibm->init_called = 1;
1791         }
1792
1793         if (ibm->read) {
1794                 entry = create_proc_entry(ibm->name,
1795                                           S_IFREG | S_IRUGO | S_IWUSR,
1796                                           proc_dir);
1797                 if (!entry) {
1798                         printk(IBM_ERR "unable to create proc entry %s\n",
1799                                ibm->name);
1800                         return -ENODEV;
1801                 }
1802                 entry->owner = THIS_MODULE;
1803                 entry->data = ibm;
1804                 entry->read_proc = &dispatch_read;
1805                 if (ibm->write)
1806                         entry->write_proc = &dispatch_write;
1807                 ibm->proc_created = 1;
1808         }
1809
1810         if (ibm->notify) {
1811                 ret = setup_notify(ibm);
1812                 if (ret < 0)
1813                         return ret;
1814                 ibm->notify_installed = 1;
1815         }
1816
1817         return 0;
1818 }
1819
1820 static void ibm_exit(struct ibm_struct *ibm)
1821 {
1822         if (ibm->notify_installed)
1823                 acpi_remove_notify_handler(*ibm->handle, ibm->type,
1824                                            dispatch_notify);
1825
1826         if (ibm->proc_created)
1827                 remove_proc_entry(ibm->name, proc_dir);
1828
1829         if (ibm->init_called && ibm->exit)
1830                 ibm->exit();
1831
1832         if (ibm->driver_registered) {
1833                 acpi_bus_unregister_driver(ibm->driver);
1834                 kfree(ibm->driver);
1835         }
1836 }
1837
1838 static void __init ibm_handle_init(char *name,
1839                                    acpi_handle * handle, acpi_handle parent,
1840                                    char **paths, int num_paths, char **path)
1841 {
1842         int i;
1843         acpi_status status;
1844
1845         for (i = 0; i < num_paths; i++) {
1846                 status = acpi_get_handle(parent, paths[i], handle);
1847                 if (ACPI_SUCCESS(status)) {
1848                         *path = paths[i];
1849                         return;
1850                 }
1851         }
1852
1853         *handle = NULL;
1854 }
1855
1856 #define IBM_HANDLE_INIT(object)                                         \
1857         ibm_handle_init(#object, &object##_handle, *object##_parent,    \
1858                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
1859
1860 static int set_ibm_param(const char *val, struct kernel_param *kp)
1861 {
1862         unsigned int i;
1863
1864         for (i = 0; i < ARRAY_SIZE(ibms); i++)
1865                 if (strcmp(ibms[i].name, kp->name) == 0 && ibms[i].write) {
1866                         if (strlen(val) > sizeof(ibms[i].param) - 2)
1867                                 return -ENOSPC;
1868                         strcpy(ibms[i].param, val);
1869                         strcat(ibms[i].param, ",");
1870                         return 0;
1871                 }
1872
1873         return -EINVAL;
1874 }
1875
1876 #define IBM_PARAM(feature) \
1877         module_param_call(feature, set_ibm_param, NULL, NULL, 0)
1878
1879 IBM_PARAM(hotkey);
1880 IBM_PARAM(bluetooth);
1881 IBM_PARAM(video);
1882 IBM_PARAM(light);
1883 IBM_PARAM(dock);
1884 IBM_PARAM(bay);
1885 IBM_PARAM(cmos);
1886 IBM_PARAM(led);
1887 IBM_PARAM(beep);
1888 IBM_PARAM(ecdump);
1889 IBM_PARAM(brightness);
1890 IBM_PARAM(volume);
1891 IBM_PARAM(fan);
1892
1893 static void acpi_ibm_exit(void)
1894 {
1895         int i;
1896
1897         for (i = ARRAY_SIZE(ibms) - 1; i >= 0; i--)
1898                 ibm_exit(&ibms[i]);
1899
1900         remove_proc_entry(IBM_DIR, acpi_root_dir);
1901 }
1902
1903 static int __init acpi_ibm_init(void)
1904 {
1905         int ret, i;
1906
1907         if (acpi_disabled)
1908                 return -ENODEV;
1909
1910         if (!acpi_specific_hotkey_enabled) {
1911                 printk(IBM_ERR "using generic hotkey driver\n");
1912                 return -ENODEV;
1913         }
1914
1915         /* ec is required because many other handles are relative to it */
1916         IBM_HANDLE_INIT(ec);
1917         if (!ec_handle) {
1918                 printk(IBM_ERR "ec object not found\n");
1919                 return -ENODEV;
1920         }
1921
1922         /* these handles are not required */
1923         IBM_HANDLE_INIT(vid);
1924         IBM_HANDLE_INIT(vid2);
1925         IBM_HANDLE_INIT(ledb);
1926         IBM_HANDLE_INIT(led);
1927         IBM_HANDLE_INIT(hkey);
1928         IBM_HANDLE_INIT(lght);
1929         IBM_HANDLE_INIT(cmos);
1930         IBM_HANDLE_INIT(dock);
1931         IBM_HANDLE_INIT(pci);
1932         IBM_HANDLE_INIT(bay);
1933         if (bay_handle)
1934                 IBM_HANDLE_INIT(bay_ej);
1935         IBM_HANDLE_INIT(bay2);
1936         if (bay2_handle)
1937                 IBM_HANDLE_INIT(bay2_ej);
1938         IBM_HANDLE_INIT(beep);
1939         IBM_HANDLE_INIT(ecrd);
1940         IBM_HANDLE_INIT(ecwr);
1941         IBM_HANDLE_INIT(fans);
1942         IBM_HANDLE_INIT(gfan);
1943         IBM_HANDLE_INIT(sfan);
1944
1945         proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
1946         if (!proc_dir) {
1947                 printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
1948                 return -ENODEV;
1949         }
1950         proc_dir->owner = THIS_MODULE;
1951
1952         for (i = 0; i < ARRAY_SIZE(ibms); i++) {
1953                 ret = ibm_init(&ibms[i]);
1954                 if (ret >= 0 && *ibms[i].param)
1955                         ret = ibms[i].write(ibms[i].param);
1956                 if (ret < 0) {
1957                         acpi_ibm_exit();
1958                         return ret;
1959                 }
1960         }
1961
1962         return 0;
1963 }
1964
1965 module_init(acpi_ibm_init);
1966 module_exit(acpi_ibm_exit);