SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/acpi/asus_acpi.c

   1 /*
   2  *  asus_acpi.c - Asus Laptop ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
   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  *  The development page for this driver is located at
  23  *  http://sourceforge.net/projects/acpi4asus/
  24  *
  25  *  Credits:
  26  *  Pontus Fuchs   - Helper functions, cleanup
  27  *  Johann Wiesner - Small compile fixes
  28  *  John Belmonte  - ACPI code for Toshiba laptop was a good starting point.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/types.h>
  36 #include <linux/proc_fs.h>
  37 #include <acpi/acpi_drivers.h>
  38 #include <acpi/acpi_bus.h>
  39 #include <asm/uaccess.h>
  40
  41 #define ASUS_ACPI_VERSION "0.30"
  42
  43 #define PROC_ASUS       "asus"  //the directory
  44 #define PROC_MLED       "mled"
  45 #define PROC_WLED       "wled"
  46 #define PROC_TLED       "tled"
  47 #define PROC_INFO       "info"
  48 #define PROC_LCD        "lcd"
  49 #define PROC_BRN        "brn"
  50 #define PROC_DISP       "disp"
  51
  52 #define ACPI_HOTK_NAME          "Asus Laptop ACPI Extras Driver"
  53 #define ACPI_HOTK_CLASS         "hotkey"
  54 #define ACPI_HOTK_DEVICE_NAME   "Hotkey"
  55 #define ACPI_HOTK_HID           "ATK0100"
  56
  57 /*
  58  * Some events we use, same for all Asus
  59  */
  60 #define BR_UP       0x10
  61 #define BR_DOWN     0x20
  62
  63 /*
  64  * Flags for hotk status
  65  */
  66 #define MLED_ON     0x01        //is MLED ON ?
  67 #define WLED_ON     0x02
  68 #define TLED_ON     0x04
  69
  70 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
  71 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
  72 MODULE_LICENSE("GPL");
  73
  74 static uid_t asus_uid;
  75 static gid_t asus_gid;
  76 module_param(asus_uid, uint, 0);
  77 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus.\n");
  78 module_param(asus_gid, uint, 0);
  79 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus.\n");
  80
  81 /* For each model, all features implemented,
  82  * those marked with R are relative to HOTK, A for absolute */
  83 struct model_data {
  84         char *name;             //name of the laptop________________A
  85         char *mt_mled;          //method to handle mled_____________R
  86         char *mled_status;      //node to handle mled reading_______A
  87         char *mt_wled;          //method to handle wled_____________R
  88         char *wled_status;      //node to handle wled reading_______A
  89         char *mt_tled;          //method to handle tled_____________R
  90         char *tled_status;      //node to handle tled reading_______A
  91         char *mt_lcd_switch;    //method to turn LCD ON/OFF_________A
  92         char *lcd_status;       //node to read LCD panel state______A
  93         char *brightness_up;    //method to set brightness up_______A
  94         char *brightness_down;  //guess what ?______________________A
  95         char *brightness_set;   //method to set absolute brightness_R
  96         char *brightness_get;   //method to get absolute brightness_R
  97         char *brightness_status;        //node to get brightness____________A
  98         char *display_set;      //method to set video output________R
  99         char *display_get;      //method to get video output________R
 100 };
 101
 102 /*
 103  * This is the main structure, we can use it to store anything interesting
 104  * about the hotk device
 105  */
 106 struct asus_hotk {
 107         struct acpi_device *device;     //the device we are in
 108         acpi_handle handle;     //the handle of the hotk device
 109         char status;            //status of the hotk, for LEDs, ...
 110         struct model_data *methods;     //methods available on the laptop
 111         u8 brightness;          //brightness level
 112         enum {
 113                 A1x = 0,        //A1340D, A1300F
 114                 A2x,            //A2500H
 115                 D1x,            //D1
 116                 L2D,            //L2000D
 117                 L3C,            //L3800C
 118                 L3D,            //L3400D
 119                 L3H,            //L3H, but also L2000E
 120                 L4R,            //L4500R
 121                 L5x,            //L5800C
 122                 L8L,            //L8400L
 123                 M1A,            //M1300A
 124                 M2E,            //M2400E, L4400L
 125                 M6N,            //M6800N
 126                 M6R,            //M6700R
 127                 P30,            //Samsung P30
 128                 S1x,            //S1300A, but also L1400B and M2400A (L84F)
 129                 S2x,            //S200 (J1 reported), Victor MP-XP7210
 130                 xxN,            //M2400N, M3700N, M5200N, S1300N, S5200N, W1OOON
 131                 //(Centrino)
 132                 END_MODEL
 133         } model;                //Models currently supported
 134         u16 event_count[128];   //count for each event TODO make this better
 135 };
 136
 137 /* Here we go */
 138 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
 139 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
 140 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
 141 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
 142 #define S1x_PREFIX "\\_SB.PCI0.PX40."
 143 #define S2x_PREFIX A1x_PREFIX
 144 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
 145
 146 static struct model_data model_conf[END_MODEL] = {
 147         /*
 148          * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
 149          * it seems to be a kind of switch, but what for ?
 150          */
 151
 152         {
 153          .name = "A1x",
 154          .mt_mled = "MLED",
 155          .mled_status = "\\MAIL",
 156          .mt_lcd_switch = A1x_PREFIX "_Q10",
 157          .lcd_status = "\\BKLI",
 158          .brightness_up = A1x_PREFIX "_Q0E",
 159          .brightness_down = A1x_PREFIX "_Q0F"},
 160
 161         {
 162          .name = "A2x",
 163          .mt_mled = "MLED",
 164          .mt_wled = "WLED",
 165          .wled_status = "\\SG66",
 166          .mt_lcd_switch = "\\Q10",
 167          .lcd_status = "\\BAOF",
 168          .brightness_set = "SPLV",
 169          .brightness_get = "GPLV",
 170          .display_set = "SDSP",
 171          .display_get = "\\INFB"},
 172
 173         {
 174          .name = "D1x",
 175          .mt_mled = "MLED",
 176          .mt_lcd_switch = "\\Q0D",
 177          .lcd_status = "\\GP11",
 178          .brightness_up = "\\Q0C",
 179          .brightness_down = "\\Q0B",
 180          .brightness_status = "\\BLVL",
 181          .display_set = "SDSP",
 182          .display_get = "\\INFB"},
 183
 184         {
 185          .name = "L2D",
 186          .mt_mled = "MLED",
 187          .mled_status = "\\SGP6",
 188          .mt_wled = "WLED",
 189          .wled_status = "\\RCP3",
 190          .mt_lcd_switch = "\\Q10",
 191          .lcd_status = "\\SGP0",
 192          .brightness_up = "\\Q0E",
 193          .brightness_down = "\\Q0F",
 194          .display_set = "SDSP",
 195          .display_get = "\\INFB"},
 196
 197         {
 198          .name = "L3C",
 199          .mt_mled = "MLED",
 200          .mt_wled = "WLED",
 201          .mt_lcd_switch = L3C_PREFIX "_Q10",
 202          .lcd_status = "\\GL32",
 203          .brightness_set = "SPLV",
 204          .brightness_get = "GPLV",
 205          .display_set = "SDSP",
 206          .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
 207
 208         {
 209          .name = "L3D",
 210          .mt_mled = "MLED",
 211          .mled_status = "\\MALD",
 212          .mt_wled = "WLED",
 213          .mt_lcd_switch = "\\Q10",
 214          .lcd_status = "\\BKLG",
 215          .brightness_set = "SPLV",
 216          .brightness_get = "GPLV",
 217          .display_set = "SDSP",
 218          .display_get = "\\INFB"},
 219
 220         {
 221          .name = "L3H",
 222          .mt_mled = "MLED",
 223          .mt_wled = "WLED",
 224          .mt_lcd_switch = "EHK",
 225          .lcd_status = "\\_SB.PCI0.PM.PBC",
 226          .brightness_set = "SPLV",
 227          .brightness_get = "GPLV",
 228          .display_set = "SDSP",
 229          .display_get = "\\INFB"},
 230
 231         {
 232          .name = "L4R",
 233          .mt_mled = "MLED",
 234          .mt_wled = "WLED",
 235          .wled_status = "\\_SB.PCI0.SBRG.SG13",
 236          .mt_lcd_switch = xxN_PREFIX "_Q10",
 237          .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
 238          .brightness_set = "SPLV",
 239          .brightness_get = "GPLV",
 240          .display_set = "SDSP",
 241          .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
 242
 243         {
 244          .name = "L5x",
 245          .mt_mled = "MLED",
 246 /* WLED present, but not controlled by ACPI */
 247          .mt_tled = "TLED",
 248          .mt_lcd_switch = "\\Q0D",
 249          .lcd_status = "\\BAOF",
 250          .brightness_set = "SPLV",
 251          .brightness_get = "GPLV",
 252          .display_set = "SDSP",
 253          .display_get = "\\INFB"},
 254
 255         {
 256          .name = "L8L"
 257 /* No features, but at least support the hotkeys */
 258          },
 259
 260         {
 261          .name = "M1A",
 262          .mt_mled = "MLED",
 263          .mt_lcd_switch = M1A_PREFIX "Q10",
 264          .lcd_status = "\\PNOF",
 265          .brightness_up = M1A_PREFIX "Q0E",
 266          .brightness_down = M1A_PREFIX "Q0F",
 267          .brightness_status = "\\BRIT",
 268          .display_set = "SDSP",
 269          .display_get = "\\INFB"},
 270
 271         {
 272          .name = "M2E",
 273          .mt_mled = "MLED",
 274          .mt_wled = "WLED",
 275          .mt_lcd_switch = "\\Q10",
 276          .lcd_status = "\\GP06",
 277          .brightness_set = "SPLV",
 278          .brightness_get = "GPLV",
 279          .display_set = "SDSP",
 280          .display_get = "\\INFB"},
 281
 282         {
 283          .name = "M6N",
 284          .mt_mled = "MLED",
 285          .mt_wled = "WLED",
 286          .wled_status = "\\_SB.PCI0.SBRG.SG13",
 287          .mt_lcd_switch = xxN_PREFIX "_Q10",
 288          .lcd_status = "\\_SB.BKLT",
 289          .brightness_set = "SPLV",
 290          .brightness_get = "GPLV",
 291          .display_set = "SDSP",
 292          .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
 293         {
 294          .name = "M6R",
 295          .mt_mled = "MLED",
 296          .mt_wled = "WLED",
 297          .mt_lcd_switch = xxN_PREFIX "_Q10",
 298          .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
 299          .brightness_set = "SPLV",
 300          .brightness_get = "GPLV",
 301          .display_set = "SDSP",
 302          .display_get = "\\SSTE"},
 303
 304         {
 305          .name = "P30",
 306          .mt_wled = "WLED",
 307          .mt_lcd_switch = P30_PREFIX "_Q0E",
 308          .lcd_status = "\\BKLT",
 309          .brightness_up = P30_PREFIX "_Q68",
 310          .brightness_down = P30_PREFIX "_Q69",
 311          .brightness_get = "GPLV",
 312          .display_set = "SDSP",
 313          .display_get = "\\DNXT"},
 314
 315         {
 316          .name = "S1x",
 317          .mt_mled = "MLED",
 318          .mled_status = "\\EMLE",
 319          .mt_wled = "WLED",
 320          .mt_lcd_switch = S1x_PREFIX "Q10",
 321          .lcd_status = "\\PNOF",
 322          .brightness_set = "SPLV",
 323          .brightness_get = "GPLV"},
 324
 325         {
 326          .name = "S2x",
 327          .mt_mled = "MLED",
 328          .mled_status = "\\MAIL",
 329          .mt_lcd_switch = S2x_PREFIX "_Q10",
 330          .lcd_status = "\\BKLI",
 331          .brightness_up = S2x_PREFIX "_Q0B",
 332          .brightness_down = S2x_PREFIX "_Q0A"},
 333
 334         {
 335          .name = "xxN",
 336          .mt_mled = "MLED",
 337 /* WLED present, but not controlled by ACPI */
 338          .mt_lcd_switch = xxN_PREFIX "_Q10",
 339          .lcd_status = "\\BKLT",
 340          .brightness_set = "SPLV",
 341          .brightness_get = "GPLV",
 342          .display_set = "SDSP",
 343          .display_get = "\\ADVG"}
 344 };
 345
 346 /* procdir we use */
 347 static struct proc_dir_entry *asus_proc_dir;
 348
 349 /*
 350  * This header is made available to allow proper configuration given model,
 351  * revision number , ... this info cannot go in struct asus_hotk because it is
 352  * available before the hotk
 353  */
 354 static struct acpi_table_header *asus_info;
 355
 356 /* The actual device the driver binds to */
 357 static struct asus_hotk *hotk;
 358
 359 /*
 360  * The hotkey driver declaration
 361  */
 362 static int asus_hotk_add(struct acpi_device *device);
 363 static int asus_hotk_remove(struct acpi_device *device, int type);
 364 static struct acpi_driver asus_hotk_driver = {
 365         .name = ACPI_HOTK_NAME,
 366         .class = ACPI_HOTK_CLASS,
 367         .ids = ACPI_HOTK_HID,
 368         .ops = {
 369                 .add = asus_hotk_add,
 370                 .remove = asus_hotk_remove,
 371                 },
 372 };
 373
 374 /*
 375  * This function evaluates an ACPI method, given an int as parameter, the
 376  * method is searched within the scope of the handle, can be NULL. The output
 377  * of the method is written is output, which can also be NULL
 378  *
 379  * returns 1 if write is successful, 0 else.
 380  */
 381 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 382                           struct acpi_buffer *output)
 383 {
 384         struct acpi_object_list params; //list of input parameters (an int here)
 385         union acpi_object in_obj;       //the only param we use
 386         acpi_status status;
 387
 388         params.count = 1;
 389         params.pointer = &in_obj;
 390         in_obj.type = ACPI_TYPE_INTEGER;
 391         in_obj.integer.value = val;
 392
 393         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 394         return (status == AE_OK);
 395 }
 396
 397 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 398 {
 399         struct acpi_buffer output;
 400         union acpi_object out_obj;
 401         acpi_status status;
 402
 403         output.length = sizeof(out_obj);
 404         output.pointer = &out_obj;
 405
 406         status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
 407         *val = out_obj.integer.value;
 408         return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
 409 }
 410
 411 /*
 412  * We write our info in page, we begin at offset off and cannot write more
 413  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
 414  * number of bytes written in page
 415  */
 416 static int
 417 proc_read_info(char *page, char **start, off_t off, int count, int *eof,
 418                void *data)
 419 {
 420         int len = 0;
 421         int temp;
 422         char buf[16];           //enough for all info
 423         /*
 424          * We use the easy way, we don't care of off and count, so we don't set eof
 425          * to 1
 426          */
 427
 428         len += sprintf(page, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
 429         len += sprintf(page + len, "Model reference    : %s\n",
 430                        hotk->methods->name);
 431         /*
 432          * The SFUN method probably allows the original driver to get the list
 433          * of features supported by a given model. For now, 0x0100 or 0x0800
 434          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
 435          * The significance of others is yet to be found.
 436          */
 437         if (read_acpi_int(hotk->handle, "SFUN", &temp))
 438                 len +=
 439                     sprintf(page + len, "SFUN value         : 0x%04x\n", temp);
 440         /*
 441          * Another value for userspace: the ASYM method returns 0x02 for
 442          * battery low and 0x04 for battery critical, its readings tend to be
 443          * more accurate than those provided by _BST.
 444          * Note: since not all the laptops provide this method, errors are
 445          * silently ignored.
 446          */
 447         if (read_acpi_int(hotk->handle, "ASYM", &temp))
 448                 len +=
 449                     sprintf(page + len, "ASYM value         : 0x%04x\n", temp);
 450         if (asus_info) {
 451                 snprintf(buf, 16, "%d", asus_info->length);
 452                 len += sprintf(page + len, "DSDT length        : %s\n", buf);
 453                 snprintf(buf, 16, "%d", asus_info->checksum);
 454                 len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
 455                 snprintf(buf, 16, "%d", asus_info->revision);
 456                 len += sprintf(page + len, "DSDT revision      : %s\n", buf);
 457                 snprintf(buf, 7, "%s", asus_info->oem_id);
 458                 len += sprintf(page + len, "OEM id             : %s\n", buf);
 459                 snprintf(buf, 9, "%s", asus_info->oem_table_id);
 460                 len += sprintf(page + len, "OEM table id       : %s\n", buf);
 461                 snprintf(buf, 16, "%x", asus_info->oem_revision);
 462                 len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
 463                 snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
 464                 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
 465                 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
 466                 len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
 467         }
 468
 469         return len;
 470 }
 471
 472 /*
 473  * /proc handlers
 474  * We write our info in page, we begin at offset off and cannot write more
 475  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
 476  * number of bytes written in page
 477  */
 478
 479 /* Generic LED functions */
 480 static int read_led(const char *ledname, int ledmask)
 481 {
 482         if (ledname) {
 483                 int led_status;
 484
 485                 if (read_acpi_int(NULL, ledname, &led_status))
 486                         return led_status;
 487                 else
 488                         printk(KERN_WARNING "Asus ACPI: Error reading LED "
 489                                "status\n");
 490         }
 491         return (hotk->status & ledmask) ? 1 : 0;
 492 }
 493
 494 static int parse_arg(const char __user * buf, unsigned long count, int *val)
 495 {
 496         char s[32];
 497         if (!count)
 498                 return 0;
 499         if (count > 31)
 500                 return -EINVAL;
 501         if (copy_from_user(s, buf, count))
 502                 return -EFAULT;
 503         s[count] = 0;
 504         if (sscanf(s, "%i", val) != 1)
 505                 return -EINVAL;
 506         return count;
 507 }
 508
 509 /* FIXME: kill extraneous args so it can be called independently */
 510 static int
 511 write_led(const char __user * buffer, unsigned long count,
 512           char *ledname, int ledmask, int invert)
 513 {
 514         int value;
 515         int led_out = 0;
 516
 517         count = parse_arg(buffer, count, &value);
 518         if (count > 0)
 519                 led_out = value ? 1 : 0;
 520
 521         hotk->status =
 522             (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
 523
 524         if (invert)             /* invert target value */
 525                 led_out = !led_out & 0x1;
 526
 527         if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
 528                 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
 529                        ledname);
 530
 531         return count;
 532 }
 533
 534 /*
 535  * Proc handlers for MLED
 536  */
 537 static int
 538 proc_read_mled(char *page, char **start, off_t off, int count, int *eof,
 539                void *data)
 540 {
 541         return sprintf(page, "%d\n",
 542                        read_led(hotk->methods->mled_status, MLED_ON));
 543 }
 544
 545 static int
 546 proc_write_mled(struct file *file, const char __user * buffer,
 547                 unsigned long count, void *data)
 548 {
 549         return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
 550 }
 551
 552 /*
 553  * Proc handlers for WLED
 554  */
 555 static int
 556 proc_read_wled(char *page, char **start, off_t off, int count, int *eof,
 557                void *data)
 558 {
 559         return sprintf(page, "%d\n",
 560                        read_led(hotk->methods->wled_status, WLED_ON));
 561 }
 562
 563 static int
 564 proc_write_wled(struct file *file, const char __user * buffer,
 565                 unsigned long count, void *data)
 566 {
 567         return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
 568 }
 569
 570 /*
 571  * Proc handlers for TLED
 572  */
 573 static int
 574 proc_read_tled(char *page, char **start, off_t off, int count, int *eof,
 575                void *data)
 576 {
 577         return sprintf(page, "%d\n",
 578                        read_led(hotk->methods->tled_status, TLED_ON));
 579 }
 580
 581 static int
 582 proc_write_tled(struct file *file, const char __user * buffer,
 583                 unsigned long count, void *data)
 584 {
 585         return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
 586 }
 587
 588 static int get_lcd_state(void)
 589 {
 590         int lcd = 0;
 591
 592         if (hotk->model != L3H) {
 593                 /* We don't have to check anything if we are here */
 594                 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
 595                         printk(KERN_WARNING
 596                                "Asus ACPI: Error reading LCD status\n");
 597
 598                 if (hotk->model == L2D)
 599                         lcd = ~lcd;
 600         } else {                /* L3H and the like have to be handled differently */
 601                 acpi_status status = 0;
 602                 struct acpi_object_list input;
 603                 union acpi_object mt_params[2];
 604                 struct acpi_buffer output;
 605                 union acpi_object out_obj;
 606
 607                 input.count = 2;
 608                 input.pointer = mt_params;
 609                 /* Note: the following values are partly guessed up, but
 610                    otherwise they seem to work */
 611                 mt_params[0].type = ACPI_TYPE_INTEGER;
 612                 mt_params[0].integer.value = 0x02;
 613                 mt_params[1].type = ACPI_TYPE_INTEGER;
 614                 mt_params[1].integer.value = 0x02;
 615
 616                 output.length = sizeof(out_obj);
 617                 output.pointer = &out_obj;
 618
 619                 status =
 620                     acpi_evaluate_object(NULL, hotk->methods->lcd_status,
 621                                          &input, &output);
 622                 if (status != AE_OK)
 623                         return -1;
 624                 if (out_obj.type == ACPI_TYPE_INTEGER)
 625                         /* That's what the AML code does */
 626                         lcd = out_obj.integer.value >> 8;
 627         }
 628
 629         return (lcd & 1);
 630 }
 631
 632 static int set_lcd_state(int value)
 633 {
 634         int lcd = 0;
 635         acpi_status status = 0;
 636
 637         lcd = value ? 1 : 0;
 638         if (lcd != get_lcd_state()) {
 639                 /* switch */
 640                 if (hotk->model != L3H) {
 641                         status =
 642                             acpi_evaluate_object(NULL,
 643                                                  hotk->methods->mt_lcd_switch,
 644                                                  NULL, NULL);
 645                 } else {        /* L3H and the like have to be handled differently */
 646                         if (!write_acpi_int
 647                             (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
 648                              NULL))
 649                                 status = AE_ERROR;
 650                         /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
 651                            the exact behaviour is simulated here */
 652                 }
 653                 if (ACPI_FAILURE(status))
 654                         printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
 655         }
 656         return 0;
 657
 658 }
 659
 660 static int
 661 proc_read_lcd(char *page, char **start, off_t off, int count, int *eof,
 662               void *data)
 663 {
 664         return sprintf(page, "%d\n", get_lcd_state());
 665 }
 666
 667 static int
 668 proc_write_lcd(struct file *file, const char __user * buffer,
 669                unsigned long count, void *data)
 670 {
 671         int value;
 672
 673         count = parse_arg(buffer, count, &value);
 674         if (count > 0)
 675                 set_lcd_state(value);
 676         return count;
 677 }
 678
 679 static int read_brightness(void)
 680 {
 681         int value;
 682
 683         if (hotk->methods->brightness_get) {    /* SPLV/GPLV laptop */
 684                 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
 685                                    &value))
 686                         printk(KERN_WARNING
 687                                "Asus ACPI: Error reading brightness\n");
 688         } else if (hotk->methods->brightness_status) {  /* For D1 for example */
 689                 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
 690                                    &value))
 691                         printk(KERN_WARNING
 692                                "Asus ACPI: Error reading brightness\n");
 693         } else                  /* No GPLV method */
 694                 value = hotk->brightness;
 695         return value;
 696 }
 697
 698 /*
 699  * Change the brightness level
 700  */
 701 static void set_brightness(int value)
 702 {
 703         acpi_status status = 0;
 704
 705         /* SPLV laptop */
 706         if (hotk->methods->brightness_set) {
 707                 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
 708                                     value, NULL))
 709                         printk(KERN_WARNING
 710                                "Asus ACPI: Error changing brightness\n");
 711                 return;
 712         }
 713
 714         /* No SPLV method if we are here, act as appropriate */
 715         value -= read_brightness();
 716         while (value != 0) {
 717                 status = acpi_evaluate_object(NULL, (value > 0) ?
 718                                               hotk->methods->brightness_up :
 719                                               hotk->methods->brightness_down,
 720                                               NULL, NULL);
 721                 (value > 0) ? value-- : value++;
 722                 if (ACPI_FAILURE(status))
 723                         printk(KERN_WARNING
 724                                "Asus ACPI: Error changing brightness\n");
 725         }
 726         return;
 727 }
 728
 729 static int
 730 proc_read_brn(char *page, char **start, off_t off, int count, int *eof,
 731               void *data)
 732 {
 733         return sprintf(page, "%d\n", read_brightness());
 734 }
 735
 736 static int
 737 proc_write_brn(struct file *file, const char __user * buffer,
 738                unsigned long count, void *data)
 739 {
 740         int value;
 741
 742         count = parse_arg(buffer, count, &value);
 743         if (count > 0) {
 744                 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
 745                 /* 0 <= value <= 15 */
 746                 set_brightness(value);
 747         } else if (count < 0) {
 748                 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
 749         }
 750
 751         return count;
 752 }
 753
 754 static void set_display(int value)
 755 {
 756         /* no sanity check needed for now */
 757         if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
 758                             value, NULL))
 759                 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
 760         return;
 761 }
 762
 763 /*
 764  * Now, *this* one could be more user-friendly, but so far, no-one has
 765  * complained. The significance of bits is the same as in proc_write_disp()
 766  */
 767 static int
 768 proc_read_disp(char *page, char **start, off_t off, int count, int *eof,
 769                void *data)
 770 {
 771         int value = 0;
 772
 773         if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
 774                 printk(KERN_WARNING
 775                        "Asus ACPI: Error reading display status\n");
 776         value &= 0x07;          /* needed for some models, shouldn't hurt others */
 777         return sprintf(page, "%d\n", value);
 778 }
 779
 780 /*
 781  * Experimental support for display switching. As of now: 1 should activate
 782  * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
 783  * (bitwise) of these will suffice. I never actually tested 3 displays hooked up
 784  * simultaneously, so be warned. See the acpi4asus README for more info.
 785  */
 786 static int
 787 proc_write_disp(struct file *file, const char __user * buffer,
 788                 unsigned long count, void *data)
 789 {
 790         int value;
 791
 792         count = parse_arg(buffer, count, &value);
 793         if (count > 0)
 794                 set_display(value);
 795         else if (count < 0)
 796                 printk(KERN_WARNING "Asus ACPI: Error reading user input\n");
 797
 798         return count;
 799 }
 800
 801 typedef int (proc_readfunc) (char *page, char **start, off_t off, int count,
 802                              int *eof, void *data);
 803 typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
 804                               unsigned long count, void *data);
 805
 806 static int
 807 asus_proc_add(char *name, proc_writefunc * writefunc,
 808                      proc_readfunc * readfunc, mode_t mode,
 809                      struct acpi_device *device)
 810 {
 811         struct proc_dir_entry *proc =
 812             create_proc_entry(name, mode, acpi_device_dir(device));
 813         if (!proc) {
 814                 printk(KERN_WARNING "  Unable to create %s fs entry\n", name);
 815                 return -1;
 816         }
 817         proc->write_proc = writefunc;
 818         proc->read_proc = readfunc;
 819         proc->data = acpi_driver_data(device);
 820         proc->owner = THIS_MODULE;
 821         proc->uid = asus_uid;
 822         proc->gid = asus_gid;
 823         return 0;
 824 }
 825
 826 static int asus_hotk_add_fs(struct acpi_device *device)
 827 {
 828         struct proc_dir_entry *proc;
 829         mode_t mode;
 830
 831         /*
 832          * If parameter uid or gid is not changed, keep the default setting for
 833          * our proc entries (-rw-rw-rw-) else, it means we care about security,
 834          * and then set to -rw-rw----
 835          */
 836
 837         if ((asus_uid == 0) && (asus_gid == 0)) {
 838                 mode = S_IFREG | S_IRUGO | S_IWUGO;
 839         } else {
 840                 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
 841                 printk(KERN_WARNING "  asus_uid and asus_gid parameters are "
 842                        "deprecated, use chown and chmod instead!\n");
 843         }
 844
 845         acpi_device_dir(device) = asus_proc_dir;
 846         if (!acpi_device_dir(device))
 847                 return -ENODEV;
 848
 849         proc = create_proc_entry(PROC_INFO, mode, acpi_device_dir(device));
 850         if (proc) {
 851                 proc->read_proc = proc_read_info;
 852                 proc->data = acpi_driver_data(device);
 853                 proc->owner = THIS_MODULE;
 854                 proc->uid = asus_uid;
 855                 proc->gid = asus_gid;
 856         } else {
 857                 printk(KERN_WARNING "  Unable to create " PROC_INFO
 858                        " fs entry\n");
 859         }
 860
 861         if (hotk->methods->mt_wled) {
 862                 asus_proc_add(PROC_WLED, &proc_write_wled, &proc_read_wled,
 863                               mode, device);
 864         }
 865
 866         if (hotk->methods->mt_mled) {
 867                 asus_proc_add(PROC_MLED, &proc_write_mled, &proc_read_mled,
 868                               mode, device);
 869         }
 870
 871         if (hotk->methods->mt_tled) {
 872                 asus_proc_add(PROC_TLED, &proc_write_tled, &proc_read_tled,
 873                               mode, device);
 874         }
 875
 876         /*
 877          * We need both read node and write method as LCD switch is also accessible
 878          * from keyboard
 879          */
 880         if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
 881                 asus_proc_add(PROC_LCD, &proc_write_lcd, &proc_read_lcd, mode,
 882                               device);
 883         }
 884
 885         if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
 886             (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
 887                 asus_proc_add(PROC_BRN, &proc_write_brn, &proc_read_brn, mode,
 888                               device);
 889         }
 890
 891         if (hotk->methods->display_set) {
 892                 asus_proc_add(PROC_DISP, &proc_write_disp, &proc_read_disp,
 893                               mode, device);
 894         }
 895
 896         return 0;
 897 }
 898
 899 static int asus_hotk_remove_fs(struct acpi_device *device)
 900 {
 901         if (acpi_device_dir(device)) {
 902                 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
 903                 if (hotk->methods->mt_wled)
 904                         remove_proc_entry(PROC_WLED, acpi_device_dir(device));
 905                 if (hotk->methods->mt_mled)
 906                         remove_proc_entry(PROC_MLED, acpi_device_dir(device));
 907                 if (hotk->methods->mt_tled)
 908                         remove_proc_entry(PROC_TLED, acpi_device_dir(device));
 909                 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
 910                         remove_proc_entry(PROC_LCD, acpi_device_dir(device));
 911                 if ((hotk->methods->brightness_up
 912                      && hotk->methods->brightness_down)
 913                     || (hotk->methods->brightness_get
 914                         && hotk->methods->brightness_set))
 915                         remove_proc_entry(PROC_BRN, acpi_device_dir(device));
 916                 if (hotk->methods->display_set)
 917                         remove_proc_entry(PROC_DISP, acpi_device_dir(device));
 918         }
 919         return 0;
 920 }
 921
 922 static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
 923 {
 924         /* TODO Find a better way to handle events count. */
 925         if (!hotk)
 926                 return;
 927
 928         if ((event & ~((u32) BR_UP)) < 16) {
 929                 hotk->brightness = (event & ~((u32) BR_UP));
 930         } else if ((event & ~((u32) BR_DOWN)) < 16) {
 931                 hotk->brightness = (event & ~((u32) BR_DOWN));
 932         }
 933
 934         acpi_bus_generate_event(hotk->device, event,
 935                                 hotk->event_count[event % 128]++);
 936
 937         return;
 938 }
 939
 940 /*
 941  * This function is used to initialize the hotk with right values. In this
 942  * method, we can make all the detection we want, and modify the hotk struct
 943  */
 944 static int asus_hotk_get_info(void)
 945 {
 946         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 947         struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
 948         union acpi_object *model = NULL;
 949         int bsts_result;
 950         acpi_status status;
 951
 952         /*
 953          * Get DSDT headers early enough to allow for differentiating between
 954          * models, but late enough to allow acpi_bus_register_driver() to fail
 955          * before doing anything ACPI-specific. Should we encounter a machine,
 956          * which needs special handling (i.e. its hotkey device has a different
 957          * HID), this bit will be moved. A global variable asus_info contains
 958          * the DSDT header.
 959          */
 960         status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
 961         if (ACPI_FAILURE(status))
 962                 printk(KERN_WARNING "  Couldn't get the DSDT table header\n");
 963         else
 964                 asus_info = (struct acpi_table_header *)dsdt.pointer;
 965
 966         /* We have to write 0 on init this far for all ASUS models */
 967         if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
 968                 printk(KERN_ERR "  Hotkey initialization failed\n");
 969                 return -ENODEV;
 970         }
 971
 972         /* This needs to be called for some laptops to init properly */
 973         if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
 974                 printk(KERN_WARNING "  Error calling BSTS\n");
 975         else if (bsts_result)
 976                 printk(KERN_NOTICE "  BSTS called, 0x%02x returned\n",
 977                        bsts_result);
 978
 979         /* This is unlikely with implicit return */
 980         if (buffer.pointer == NULL)
 981                 return -EINVAL;
 982
 983         model = (union acpi_object *)buffer.pointer;
 984         /*
 985          * Samsung P30 has a device with a valid _HID whose INIT does not
 986          * return anything. It used to be possible to catch this exception,
 987          * but the implicit return code will now happily confuse the
 988          * driver. We assume that every ACPI_TYPE_STRING is a valid model
 989          * identifier but it's still possible to get completely bogus data.
 990          */
 991         if (model->type == ACPI_TYPE_STRING) {
 992                 printk(KERN_NOTICE "  %s model detected, ",
 993                        model->string.pointer);
 994         } else {
 995                 if (asus_info &&        /* Samsung P30 */
 996                     strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
 997                         hotk->model = P30;
 998                         printk(KERN_NOTICE
 999                                "  Samsung P30 detected, supported\n");
1000                 } else {
1001                         hotk->model = M2E;
1002                         printk(KERN_WARNING "  no string returned by INIT\n");
1003                         printk(KERN_WARNING "  trying default values, supply "
1004                                "the developers with your DSDT\n");
1005                 }
1006                 hotk->methods = &model_conf[hotk->model];
1007
1008                 kfree(model);
1009
1010                 return AE_OK;
1011         }
1012
1013         hotk->model = END_MODEL;
1014         if (strncmp(model->string.pointer, "L3D", 3) == 0)
1015                 hotk->model = L3D;
1016         else if (strncmp(model->string.pointer, "L3H", 3) == 0 ||
1017                  strncmp(model->string.pointer, "L2E", 3) == 0)
1018                 hotk->model = L3H;
1019         else if (strncmp(model->string.pointer, "L3", 2) == 0 ||
1020                  strncmp(model->string.pointer, "L2B", 3) == 0)
1021                 hotk->model = L3C;
1022         else if (strncmp(model->string.pointer, "L8L", 3) == 0)
1023                 hotk->model = L8L;
1024         else if (strncmp(model->string.pointer, "L4R", 3) == 0)
1025                 hotk->model = L4R;
1026         else if (strncmp(model->string.pointer, "M6N", 3) == 0)
1027                 hotk->model = M6N;
1028         else if (strncmp(model->string.pointer, "M6R", 3) == 0)
1029                 hotk->model = M6R;
1030         else if (strncmp(model->string.pointer, "M2N", 3) == 0 ||
1031                  strncmp(model->string.pointer, "M3N", 3) == 0 ||
1032                  strncmp(model->string.pointer, "M5N", 3) == 0 ||
1033                  strncmp(model->string.pointer, "M6N", 3) == 0 ||
1034                  strncmp(model->string.pointer, "S1N", 3) == 0 ||
1035                  strncmp(model->string.pointer, "S5N", 3) == 0 ||
1036                  strncmp(model->string.pointer, "W1N", 3) == 0)
1037                 hotk->model = xxN;
1038         else if (strncmp(model->string.pointer, "M1", 2) == 0)
1039                 hotk->model = M1A;
1040         else if (strncmp(model->string.pointer, "M2", 2) == 0 ||
1041                  strncmp(model->string.pointer, "L4E", 3) == 0)
1042                 hotk->model = M2E;
1043         else if (strncmp(model->string.pointer, "L2", 2) == 0)
1044                 hotk->model = L2D;
1045         else if (strncmp(model->string.pointer, "L8", 2) == 0)
1046                 hotk->model = S1x;
1047         else if (strncmp(model->string.pointer, "D1", 2) == 0)
1048                 hotk->model = D1x;
1049         else if (strncmp(model->string.pointer, "A1", 2) == 0)
1050                 hotk->model = A1x;
1051         else if (strncmp(model->string.pointer, "A2", 2) == 0)
1052                 hotk->model = A2x;
1053         else if (strncmp(model->string.pointer, "J1", 2) == 0)
1054                 hotk->model = S2x;
1055         else if (strncmp(model->string.pointer, "L5", 2) == 0)
1056                 hotk->model = L5x;
1057
1058         if (hotk->model == END_MODEL) {
1059                 printk("unsupported, trying default values, supply the "
1060                        "developers with your DSDT\n");
1061                 hotk->model = M2E;
1062         } else {
1063                 printk("supported\n");
1064         }
1065
1066         hotk->methods = &model_conf[hotk->model];
1067
1068         /* Sort of per-model blacklist */
1069         if (strncmp(model->string.pointer, "L2B", 3) == 0)
1070                 hotk->methods->lcd_status = NULL;
1071         /* L2B is similar enough to L3C to use its settings, with this only
1072            exception */
1073         else if (strncmp(model->string.pointer, "S5N", 3) == 0 ||
1074                  strncmp(model->string.pointer, "M5N", 3) == 0)
1075                 hotk->methods->mt_mled = NULL;
1076         /* S5N and M5N have no MLED */
1077         else if (strncmp(model->string.pointer, "M2N", 3) == 0 ||
1078                  strncmp(model->string.pointer, "W1N", 3) == 0)
1079                 hotk->methods->mt_wled = "WLED";
1080         /* M2N and W1N have a usable WLED */
1081         else if (asus_info) {
1082                 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1083                         hotk->methods->mled_status = NULL;
1084                 /* S1300A reports L84F, but L1400B too, account for that */
1085         }
1086
1087         kfree(model);
1088
1089         return AE_OK;
1090 }
1091
1092 static int asus_hotk_check(void)
1093 {
1094         int result = 0;
1095
1096         result = acpi_bus_get_status(hotk->device);
1097         if (result)
1098                 return result;
1099
1100         if (hotk->device->status.present) {
1101                 result = asus_hotk_get_info();
1102         } else {
1103                 printk(KERN_ERR "  Hotkey device not present, aborting\n");
1104                 return -EINVAL;
1105         }
1106
1107         return result;
1108 }
1109
1110 static int asus_hotk_found;
1111
1112 static int asus_hotk_add(struct acpi_device *device)
1113 {
1114         acpi_status status = AE_OK;
1115         int result;
1116
1117         if (!device)
1118                 return -EINVAL;
1119
1120         printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1121                ASUS_ACPI_VERSION);
1122
1123         hotk =
1124             (struct asus_hotk *)kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1125         if (!hotk)
1126                 return -ENOMEM;
1127         memset(hotk, 0, sizeof(struct asus_hotk));
1128
1129         hotk->handle = device->handle;
1130         strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1131         strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1132         acpi_driver_data(device) = hotk;
1133         hotk->device = device;
1134
1135         result = asus_hotk_check();
1136         if (result)
1137                 goto end;
1138
1139         result = asus_hotk_add_fs(device);
1140         if (result)
1141                 goto end;
1142
1143         /*
1144          * We install the handler, it will receive the hotk in parameter, so, we
1145          * could add other data to the hotk struct
1146          */
1147         status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1148                                              asus_hotk_notify, hotk);
1149         if (ACPI_FAILURE(status))
1150                 printk(KERN_ERR "  Error installing notify handler\n");
1151
1152         /* For laptops without GPLV: init the hotk->brightness value */
1153         if ((!hotk->methods->brightness_get)
1154             && (!hotk->methods->brightness_status)
1155             && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1156                 status =
1157                     acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1158                                          NULL, NULL);
1159                 if (ACPI_FAILURE(status))
1160                         printk(KERN_WARNING "  Error changing brightness\n");
1161                 else {
1162                         status =
1163                             acpi_evaluate_object(NULL,
1164                                                  hotk->methods->brightness_up,
1165                                                  NULL, NULL);
1166                         if (ACPI_FAILURE(status))
1167                                 printk(KERN_WARNING "  Strange, error changing"
1168                                        " brightness\n");
1169                 }
1170         }
1171
1172         asus_hotk_found = 1;
1173
1174       end:
1175         if (result) {
1176                 kfree(hotk);
1177         }
1178
1179         return result;
1180 }
1181
1182 static int asus_hotk_remove(struct acpi_device *device, int type)
1183 {
1184         acpi_status status = 0;
1185
1186         if (!device || !acpi_driver_data(device))
1187                 return -EINVAL;
1188
1189         status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
1190                                             asus_hotk_notify);
1191         if (ACPI_FAILURE(status))
1192                 printk(KERN_ERR "Asus ACPI: Error removing notify handler\n");
1193
1194         asus_hotk_remove_fs(device);
1195
1196         kfree(hotk);
1197
1198         return 0;
1199 }
1200
1201 static int __init asus_acpi_init(void)
1202 {
1203         int result;
1204
1205         if (acpi_disabled)
1206                 return -ENODEV;
1207
1208         if (!acpi_specific_hotkey_enabled) {
1209                 printk(KERN_ERR "Using generic hotkey driver\n");
1210                 return -ENODEV;
1211         }
1212         asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1213         if (!asus_proc_dir) {
1214                 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1215                 return -ENODEV;
1216         }
1217         asus_proc_dir->owner = THIS_MODULE;
1218
1219         result = acpi_bus_register_driver(&asus_hotk_driver);
1220         if (result < 0) {
1221                 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1222                 return result;
1223         }
1224
1225         /*
1226          * This is a bit of a kludge.  We only want this module loaded
1227          * for ASUS systems, but there's currently no way to probe the
1228          * ACPI namespace for ASUS HIDs.  So we just return failure if
1229          * we didn't find one, which will cause the module to be
1230          * unloaded.
1231          */
1232         if (!asus_hotk_found) {
1233                 acpi_bus_unregister_driver(&asus_hotk_driver);
1234                 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1235                 return result;
1236         }
1237
1238         return 0;
1239 }
1240
1241 static void __exit asus_acpi_exit(void)
1242 {
1243         acpi_bus_unregister_driver(&asus_hotk_driver);
1244         remove_proc_entry(PROC_ASUS, acpi_root_dir);
1245
1246         kfree(asus_info);
1247
1248         return;
1249 }
1250
1251 module_init(asus_acpi_init);
1252 module_exit(asus_acpi_exit);