drivers/platform/x86/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  *  �ic Burghard  - LED display support for W1N
  30  *
  31  */
  32
  33 #include <linux/kernel.h>
  34 #include <linux/module.h>
  35 #include <linux/init.h>
  36 #include <linux/types.h>
  37 #include <linux/proc_fs.h>
  38 #include <linux/seq_file.h>
  39 #include <linux/backlight.h>
  40 #include <acpi/acpi_drivers.h>
  41 #include <acpi/acpi_bus.h>
  42 #include <asm/uaccess.h>
  43
  44 #define ASUS_ACPI_VERSION "0.30"
  45
  46 #define PROC_ASUS       "asus"  /* The directory */
  47 #define PROC_MLED       "mled"
  48 #define PROC_WLED       "wled"
  49 #define PROC_TLED       "tled"
  50 #define PROC_BT         "bluetooth"
  51 #define PROC_LEDD       "ledd"
  52 #define PROC_INFO       "info"
  53 #define PROC_LCD        "lcd"
  54 #define PROC_BRN        "brn"
  55 #define PROC_DISP       "disp"
  56
  57 #define ACPI_HOTK_NAME          "Asus Laptop ACPI Extras Driver"
  58 #define ACPI_HOTK_CLASS         "hotkey"
  59 #define ACPI_HOTK_DEVICE_NAME   "Hotkey"
  60
  61 /*
  62  * Some events we use, same for all Asus
  63  */
  64 #define BR_UP       0x10
  65 #define BR_DOWN     0x20
  66
  67 /*
  68  * Flags for hotk status
  69  */
  70 #define MLED_ON     0x01        /* Mail LED */
  71 #define WLED_ON     0x02        /* Wireless LED */
  72 #define TLED_ON     0x04        /* Touchpad LED */
  73 #define BT_ON       0x08        /* Internal Bluetooth */
  74
  75 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
  76 MODULE_DESCRIPTION(ACPI_HOTK_NAME);
  77 MODULE_LICENSE("GPL");
  78
  79 static uid_t asus_uid;
  80 static gid_t asus_gid;
  81 module_param(asus_uid, uint, 0);
  82 MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
  83 module_param(asus_gid, uint, 0);
  84 MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
  85
  86 /* For each model, all features implemented,
  87  * those marked with R are relative to HOTK, A for absolute */
  88 struct model_data {
  89         char *name;             /* name of the laptop________________A */
  90         char *mt_mled;          /* method to handle mled_____________R */
  91         char *mled_status;      /* node to handle mled reading_______A */
  92         char *mt_wled;          /* method to handle wled_____________R */
  93         char *wled_status;      /* node to handle wled reading_______A */
  94         char *mt_tled;          /* method to handle tled_____________R */
  95         char *tled_status;      /* node to handle tled reading_______A */
  96         char *mt_ledd;          /* method to handle LED display______R */
  97         char *mt_bt_switch;     /* method to switch Bluetooth on/off_R */
  98         char *bt_status;        /* no model currently supports this__? */
  99         char *mt_lcd_switch;    /* method to turn LCD on/off_________A */
 100         char *lcd_status;       /* node to read LCD panel state______A */
 101         char *brightness_up;    /* method to set brightness up_______A */
 102         char *brightness_down;  /* method to set brightness down ____A */
 103         char *brightness_set;   /* method to set absolute brightness_R */
 104         char *brightness_get;   /* method to get absolute brightness_R */
 105         char *brightness_status;/* node to get brightness____________A */
 106         char *display_set;      /* method to set video output________R */
 107         char *display_get;      /* method to get video output________R */
 108 };
 109
 110 /*
 111  * This is the main structure, we can use it to store anything interesting
 112  * about the hotk device
 113  */
 114 struct asus_hotk {
 115         struct acpi_device *device;     /* the device we are in */
 116         acpi_handle handle;             /* the handle of the hotk device */
 117         char status;                    /* status of the hotk, for LEDs */
 118         u32 ledd_status;                /* status of the LED display */
 119         struct model_data *methods;     /* methods available on the laptop */
 120         u8 brightness;                  /* brightness level */
 121         enum {
 122                 A1x = 0,        /* A1340D, A1300F */
 123                 A2x,            /* A2500H */
 124                 A4G,            /* A4700G */
 125                 D1x,            /* D1 */
 126                 L2D,            /* L2000D */
 127                 L3C,            /* L3800C */
 128                 L3D,            /* L3400D */
 129                 L3H,            /* L3H, L2000E, L5D */
 130                 L4R,            /* L4500R */
 131                 L5x,            /* L5800C */
 132                 L8L,            /* L8400L */
 133                 M1A,            /* M1300A */
 134                 M2E,            /* M2400E, L4400L */
 135                 M6N,            /* M6800N, W3400N */
 136                 M6R,            /* M6700R, A3000G */
 137                 P30,            /* Samsung P30 */
 138                 S1x,            /* S1300A, but also L1400B and M2400A (L84F) */
 139                 S2x,            /* S200 (J1 reported), Victor MP-XP7210 */
 140                 W1N,            /* W1000N */
 141                 W5A,            /* W5A */
 142                 W3V,            /* W3030V */
 143                 xxN,            /* M2400N, M3700N, M5200N, M6800N,
 144                                                          S1300N, S5200N*/
 145                 A4S,            /* Z81sp */
 146                 F3Sa,           /* (Centrino) */
 147                 R1F,
 148                 END_MODEL
 149         } model;                /* Models currently supported */
 150         u16 event_count[128];   /* Count for each event TODO make this better */
 151 };
 152
 153 /* Here we go */
 154 #define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
 155 #define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
 156 #define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
 157 #define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
 158 #define S1x_PREFIX "\\_SB.PCI0.PX40."
 159 #define S2x_PREFIX A1x_PREFIX
 160 #define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
 161
 162 static struct model_data model_conf[END_MODEL] = {
 163         /*
 164          * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
 165          * it seems to be a kind of switch, but what for ?
 166          */
 167
 168         {
 169          .name = "A1x",
 170          .mt_mled = "MLED",
 171          .mled_status = "\\MAIL",
 172          .mt_lcd_switch = A1x_PREFIX "_Q10",
 173          .lcd_status = "\\BKLI",
 174          .brightness_up = A1x_PREFIX "_Q0E",
 175          .brightness_down = A1x_PREFIX "_Q0F"},
 176
 177         {
 178          .name = "A2x",
 179          .mt_mled = "MLED",
 180          .mt_wled = "WLED",
 181          .wled_status = "\\SG66",
 182          .mt_lcd_switch = "\\Q10",
 183          .lcd_status = "\\BAOF",
 184          .brightness_set = "SPLV",
 185          .brightness_get = "GPLV",
 186          .display_set = "SDSP",
 187          .display_get = "\\INFB"},
 188
 189         {
 190          .name = "A4G",
 191          .mt_mled = "MLED",
 192 /* WLED present, but not controlled by ACPI */
 193          .mt_lcd_switch = xxN_PREFIX "_Q10",
 194          .brightness_set = "SPLV",
 195          .brightness_get = "GPLV",
 196          .display_set = "SDSP",
 197          .display_get = "\\ADVG"},
 198
 199         {
 200          .name = "D1x",
 201          .mt_mled = "MLED",
 202          .mt_lcd_switch = "\\Q0D",
 203          .lcd_status = "\\GP11",
 204          .brightness_up = "\\Q0C",
 205          .brightness_down = "\\Q0B",
 206          .brightness_status = "\\BLVL",
 207          .display_set = "SDSP",
 208          .display_get = "\\INFB"},
 209
 210         {
 211          .name = "L2D",
 212          .mt_mled = "MLED",
 213          .mled_status = "\\SGP6",
 214          .mt_wled = "WLED",
 215          .wled_status = "\\RCP3",
 216          .mt_lcd_switch = "\\Q10",
 217          .lcd_status = "\\SGP0",
 218          .brightness_up = "\\Q0E",
 219          .brightness_down = "\\Q0F",
 220          .display_set = "SDSP",
 221          .display_get = "\\INFB"},
 222
 223         {
 224          .name = "L3C",
 225          .mt_mled = "MLED",
 226          .mt_wled = "WLED",
 227          .mt_lcd_switch = L3C_PREFIX "_Q10",
 228          .lcd_status = "\\GL32",
 229          .brightness_set = "SPLV",
 230          .brightness_get = "GPLV",
 231          .display_set = "SDSP",
 232          .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
 233
 234         {
 235          .name = "L3D",
 236          .mt_mled = "MLED",
 237          .mled_status = "\\MALD",
 238          .mt_wled = "WLED",
 239          .mt_lcd_switch = "\\Q10",
 240          .lcd_status = "\\BKLG",
 241          .brightness_set = "SPLV",
 242          .brightness_get = "GPLV",
 243          .display_set = "SDSP",
 244          .display_get = "\\INFB"},
 245
 246         {
 247          .name = "L3H",
 248          .mt_mled = "MLED",
 249          .mt_wled = "WLED",
 250          .mt_lcd_switch = "EHK",
 251          .lcd_status = "\\_SB.PCI0.PM.PBC",
 252          .brightness_set = "SPLV",
 253          .brightness_get = "GPLV",
 254          .display_set = "SDSP",
 255          .display_get = "\\INFB"},
 256
 257         {
 258          .name = "L4R",
 259          .mt_mled = "MLED",
 260          .mt_wled = "WLED",
 261          .wled_status = "\\_SB.PCI0.SBRG.SG13",
 262          .mt_lcd_switch = xxN_PREFIX "_Q10",
 263          .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
 264          .brightness_set = "SPLV",
 265          .brightness_get = "GPLV",
 266          .display_set = "SDSP",
 267          .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
 268
 269         {
 270          .name = "L5x",
 271          .mt_mled = "MLED",
 272 /* WLED present, but not controlled by ACPI */
 273          .mt_tled = "TLED",
 274          .mt_lcd_switch = "\\Q0D",
 275          .lcd_status = "\\BAOF",
 276          .brightness_set = "SPLV",
 277          .brightness_get = "GPLV",
 278          .display_set = "SDSP",
 279          .display_get = "\\INFB"},
 280
 281         {
 282          .name = "L8L"
 283 /* No features, but at least support the hotkeys */
 284          },
 285
 286         {
 287          .name = "M1A",
 288          .mt_mled = "MLED",
 289          .mt_lcd_switch = M1A_PREFIX "Q10",
 290          .lcd_status = "\\PNOF",
 291          .brightness_up = M1A_PREFIX "Q0E",
 292          .brightness_down = M1A_PREFIX "Q0F",
 293          .brightness_status = "\\BRIT",
 294          .display_set = "SDSP",
 295          .display_get = "\\INFB"},
 296
 297         {
 298          .name = "M2E",
 299          .mt_mled = "MLED",
 300          .mt_wled = "WLED",
 301          .mt_lcd_switch = "\\Q10",
 302          .lcd_status = "\\GP06",
 303          .brightness_set = "SPLV",
 304          .brightness_get = "GPLV",
 305          .display_set = "SDSP",
 306          .display_get = "\\INFB"},
 307
 308         {
 309          .name = "M6N",
 310          .mt_mled = "MLED",
 311          .mt_wled = "WLED",
 312          .wled_status = "\\_SB.PCI0.SBRG.SG13",
 313          .mt_lcd_switch = xxN_PREFIX "_Q10",
 314          .lcd_status = "\\_SB.BKLT",
 315          .brightness_set = "SPLV",
 316          .brightness_get = "GPLV",
 317          .display_set = "SDSP",
 318          .display_get = "\\SSTE"},
 319
 320         {
 321          .name = "M6R",
 322          .mt_mled = "MLED",
 323          .mt_wled = "WLED",
 324          .mt_lcd_switch = xxN_PREFIX "_Q10",
 325          .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
 326          .brightness_set = "SPLV",
 327          .brightness_get = "GPLV",
 328          .display_set = "SDSP",
 329          .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
 330
 331         {
 332          .name = "P30",
 333          .mt_wled = "WLED",
 334          .mt_lcd_switch = P30_PREFIX "_Q0E",
 335          .lcd_status = "\\BKLT",
 336          .brightness_up = P30_PREFIX "_Q68",
 337          .brightness_down = P30_PREFIX "_Q69",
 338          .brightness_get = "GPLV",
 339          .display_set = "SDSP",
 340          .display_get = "\\DNXT"},
 341
 342         {
 343          .name = "S1x",
 344          .mt_mled = "MLED",
 345          .mled_status = "\\EMLE",
 346          .mt_wled = "WLED",
 347          .mt_lcd_switch = S1x_PREFIX "Q10",
 348          .lcd_status = "\\PNOF",
 349          .brightness_set = "SPLV",
 350          .brightness_get = "GPLV"},
 351
 352         {
 353          .name = "S2x",
 354          .mt_mled = "MLED",
 355          .mled_status = "\\MAIL",
 356          .mt_lcd_switch = S2x_PREFIX "_Q10",
 357          .lcd_status = "\\BKLI",
 358          .brightness_up = S2x_PREFIX "_Q0B",
 359          .brightness_down = S2x_PREFIX "_Q0A"},
 360
 361         {
 362          .name = "W1N",
 363          .mt_mled = "MLED",
 364          .mt_wled = "WLED",
 365          .mt_ledd = "SLCM",
 366          .mt_lcd_switch = xxN_PREFIX "_Q10",
 367          .lcd_status = "\\BKLT",
 368          .brightness_set = "SPLV",
 369          .brightness_get = "GPLV",
 370          .display_set = "SDSP",
 371          .display_get = "\\ADVG"},
 372
 373         {
 374          .name = "W5A",
 375          .mt_bt_switch = "BLED",
 376          .mt_wled = "WLED",
 377          .mt_lcd_switch = xxN_PREFIX "_Q10",
 378          .brightness_set = "SPLV",
 379          .brightness_get = "GPLV",
 380          .display_set = "SDSP",
 381          .display_get = "\\ADVG"},
 382
 383         {
 384          .name = "W3V",
 385          .mt_mled = "MLED",
 386          .mt_wled = "WLED",
 387          .mt_lcd_switch = xxN_PREFIX "_Q10",
 388          .lcd_status = "\\BKLT",
 389          .brightness_set = "SPLV",
 390          .brightness_get = "GPLV",
 391          .display_set = "SDSP",
 392          .display_get = "\\INFB"},
 393
 394        {
 395          .name = "xxN",
 396          .mt_mled = "MLED",
 397 /* WLED present, but not controlled by ACPI */
 398          .mt_lcd_switch = xxN_PREFIX "_Q10",
 399          .lcd_status = "\\BKLT",
 400          .brightness_set = "SPLV",
 401          .brightness_get = "GPLV",
 402          .display_set = "SDSP",
 403         .display_get = "\\ADVG"},
 404
 405         {
 406                 .name              = "A4S",
 407                 .brightness_set    = "SPLV",
 408                 .brightness_get    = "GPLV",
 409                 .mt_bt_switch      = "BLED",
 410                 .mt_wled           = "WLED"
 411         },
 412
 413         {
 414                 .name           = "F3Sa",
 415                 .mt_bt_switch   = "BLED",
 416                 .mt_wled        = "WLED",
 417                 .mt_mled        = "MLED",
 418                 .brightness_get = "GPLV",
 419                 .brightness_set = "SPLV",
 420                 .mt_lcd_switch  = "\\_SB.PCI0.SBRG.EC0._Q10",
 421                 .lcd_status     = "\\_SB.PCI0.SBRG.EC0.RPIN",
 422                 .display_get    = "\\ADVG",
 423                 .display_set    = "SDSP",
 424         },
 425         {
 426                 .name = "R1F",
 427                 .mt_bt_switch = "BLED",
 428                 .mt_mled = "MLED",
 429                 .mt_wled = "WLED",
 430                 .mt_lcd_switch = "\\Q10",
 431                 .lcd_status = "\\GP06",
 432                 .brightness_set = "SPLV",
 433                 .brightness_get = "GPLV",
 434                 .display_set = "SDSP",
 435                 .display_get = "\\INFB"
 436         }
 437 };
 438
 439 /* procdir we use */
 440 static struct proc_dir_entry *asus_proc_dir;
 441
 442 static struct backlight_device *asus_backlight_device;
 443
 444 /*
 445  * This header is made available to allow proper configuration given model,
 446  * revision number , ... this info cannot go in struct asus_hotk because it is
 447  * available before the hotk
 448  */
 449 static struct acpi_table_header *asus_info;
 450
 451 /* The actual device the driver binds to */
 452 static struct asus_hotk *hotk;
 453
 454 /*
 455  * The hotkey driver and autoloading declaration
 456  */
 457 static int asus_hotk_add(struct acpi_device *device);
 458 static int asus_hotk_remove(struct acpi_device *device, int type);
 459 static void asus_hotk_notify(struct acpi_device *device, u32 event);
 460
 461 static const struct acpi_device_id asus_device_ids[] = {
 462         {"ATK0100", 0},
 463         {"", 0},
 464 };
 465 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
 466
 467 static struct acpi_driver asus_hotk_driver = {
 468         .name = "asus_acpi",
 469         .class = ACPI_HOTK_CLASS,
 470         .owner = THIS_MODULE,
 471         .ids = asus_device_ids,
 472         .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
 473         .ops = {
 474                 .add = asus_hotk_add,
 475                 .remove = asus_hotk_remove,
 476                 .notify = asus_hotk_notify,
 477                 },
 478 };
 479
 480 /*
 481  * This function evaluates an ACPI method, given an int as parameter, the
 482  * method is searched within the scope of the handle, can be NULL. The output
 483  * of the method is written is output, which can also be NULL
 484  *
 485  * returns 1 if write is successful, 0 else.
 486  */
 487 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 488                           struct acpi_buffer *output)
 489 {
 490         struct acpi_object_list params; /* list of input parameters (int) */
 491         union acpi_object in_obj;       /* the only param we use */
 492         acpi_status status;
 493
 494         params.count = 1;
 495         params.pointer = &in_obj;
 496         in_obj.type = ACPI_TYPE_INTEGER;
 497         in_obj.integer.value = val;
 498
 499         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 500         return (status == AE_OK);
 501 }
 502
 503 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 504 {
 505         struct acpi_buffer output;
 506         union acpi_object out_obj;
 507         acpi_status status;
 508
 509         output.length = sizeof(out_obj);
 510         output.pointer = &out_obj;
 511
 512         status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
 513         *val = out_obj.integer.value;
 514         return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
 515 }
 516
 517 static int asus_info_proc_show(struct seq_file *m, void *v)
 518 {
 519         int temp;
 520
 521         seq_printf(m, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
 522         seq_printf(m, "Model reference    : %s\n", hotk->methods->name);
 523         /*
 524          * The SFUN method probably allows the original driver to get the list
 525          * of features supported by a given model. For now, 0x0100 or 0x0800
 526          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
 527          * The significance of others is yet to be found.
 528          */
 529         if (read_acpi_int(hotk->handle, "SFUN", &temp))
 530                 seq_printf(m, "SFUN value         : 0x%04x\n", temp);
 531         /*
 532          * Another value for userspace: the ASYM method returns 0x02 for
 533          * battery low and 0x04 for battery critical, its readings tend to be
 534          * more accurate than those provided by _BST.
 535          * Note: since not all the laptops provide this method, errors are
 536          * silently ignored.
 537          */
 538         if (read_acpi_int(hotk->handle, "ASYM", &temp))
 539                 seq_printf(m, "ASYM value         : 0x%04x\n", temp);
 540         if (asus_info) {
 541                 seq_printf(m, "DSDT length        : %d\n", asus_info->length);
 542                 seq_printf(m, "DSDT checksum      : %d\n", asus_info->checksum);
 543                 seq_printf(m, "DSDT revision      : %d\n", asus_info->revision);
 544                 seq_printf(m, "OEM id             : %.*s\n", ACPI_OEM_ID_SIZE, asus_info->oem_id);
 545                 seq_printf(m, "OEM table id       : %.*s\n", ACPI_OEM_TABLE_ID_SIZE, asus_info->oem_table_id);
 546                 seq_printf(m, "OEM revision       : 0x%x\n", asus_info->oem_revision);
 547                 seq_printf(m, "ASL comp vendor id : %.*s\n", ACPI_NAME_SIZE, asus_info->asl_compiler_id);
 548                 seq_printf(m, "ASL comp revision  : 0x%x\n", asus_info->asl_compiler_revision);
 549         }
 550
 551         return 0;
 552 }
 553
 554 static int asus_info_proc_open(struct inode *inode, struct file *file)
 555 {
 556         return single_open(file, asus_info_proc_show, NULL);
 557 }
 558
 559 static const struct file_operations asus_info_proc_fops = {
 560         .owner          = THIS_MODULE,
 561         .open           = asus_info_proc_open,
 562         .read           = seq_read,
 563         .llseek         = seq_lseek,
 564         .release        = single_release,
 565 };
 566
 567 /*
 568  * /proc handlers
 569  * We write our info in page, we begin at offset off and cannot write more
 570  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
 571  * number of bytes written in page
 572  */
 573
 574 /* Generic LED functions */
 575 static int read_led(const char *ledname, int ledmask)
 576 {
 577         if (ledname) {
 578                 int led_status;
 579
 580                 if (read_acpi_int(NULL, ledname, &led_status))
 581                         return led_status;
 582                 else
 583                         printk(KERN_WARNING "Asus ACPI: Error reading LED "
 584                                "status\n");
 585         }
 586         return (hotk->status & ledmask) ? 1 : 0;
 587 }
 588
 589 static int parse_arg(const char __user *buf, unsigned long count, int *val)
 590 {
 591         char s[32];
 592         if (!count)
 593                 return 0;
 594         if (count > 31)
 595                 return -EINVAL;
 596         if (copy_from_user(s, buf, count))
 597                 return -EFAULT;
 598         s[count] = 0;
 599         if (sscanf(s, "%i", val) != 1)
 600                 return -EINVAL;
 601         return count;
 602 }
 603
 604 /* FIXME: kill extraneous args so it can be called independently */
 605 static int
 606 write_led(const char __user *buffer, unsigned long count,
 607           char *ledname, int ledmask, int invert)
 608 {
 609         int rv, value;
 610         int led_out = 0;
 611
 612         rv = parse_arg(buffer, count, &value);
 613         if (rv > 0)
 614                 led_out = value ? 1 : 0;
 615
 616         hotk->status =
 617             (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
 618
 619         if (invert)             /* invert target value */
 620                 led_out = !led_out;
 621
 622         if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
 623                 printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
 624                        ledname);
 625
 626         return rv;
 627 }
 628
 629 /*
 630  * Proc handlers for MLED
 631  */
 632 static int mled_proc_show(struct seq_file *m, void *v)
 633 {
 634         seq_printf(m, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
 635         return 0;
 636 }
 637
 638 static int mled_proc_open(struct inode *inode, struct file *file)
 639 {
 640         return single_open(file, mled_proc_show, NULL);
 641 }
 642
 643 static ssize_t mled_proc_write(struct file *file, const char __user *buffer,
 644                 size_t count, loff_t *pos)
 645 {
 646         return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
 647 }
 648
 649 static const struct file_operations mled_proc_fops = {
 650         .owner          = THIS_MODULE,
 651         .open           = mled_proc_open,
 652         .read           = seq_read,
 653         .llseek         = seq_lseek,
 654         .release        = single_release,
 655         .write          = mled_proc_write,
 656 };
 657
 658 /*
 659  * Proc handlers for LED display
 660  */
 661 static int ledd_proc_show(struct seq_file *m, void *v)
 662 {
 663         seq_printf(m, "0x%08x\n", hotk->ledd_status);
 664         return 0;
 665 }
 666
 667 static int ledd_proc_open(struct inode *inode, struct file *file)
 668 {
 669         return single_open(file, ledd_proc_show, NULL);
 670 }
 671
 672 static ssize_t ledd_proc_write(struct file *file, const char __user *buffer,
 673                 size_t count, loff_t *pos)
 674 {
 675         int rv, value;
 676
 677         rv = parse_arg(buffer, count, &value);
 678         if (rv > 0) {
 679                 if (!write_acpi_int
 680                     (hotk->handle, hotk->methods->mt_ledd, value, NULL))
 681                         printk(KERN_WARNING
 682                                "Asus ACPI: LED display write failed\n");
 683                 else
 684                         hotk->ledd_status = (u32) value;
 685         }
 686         return rv;
 687 }
 688
 689 static const struct file_operations ledd_proc_fops = {
 690         .owner          = THIS_MODULE,
 691         .open           = ledd_proc_open,
 692         .read           = seq_read,
 693         .llseek         = seq_lseek,
 694         .release        = single_release,
 695         .write          = ledd_proc_write,
 696 };
 697
 698 /*
 699  * Proc handlers for WLED
 700  */
 701 static int wled_proc_show(struct seq_file *m, void *v)
 702 {
 703         seq_printf(m, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
 704         return 0;
 705 }
 706
 707 static int wled_proc_open(struct inode *inode, struct file *file)
 708 {
 709         return single_open(file, wled_proc_show, NULL);
 710 }
 711
 712 static ssize_t wled_proc_write(struct file *file, const char __user *buffer,
 713                 size_t count, loff_t *pos)
 714 {
 715         return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
 716 }
 717
 718 static const struct file_operations wled_proc_fops = {
 719         .owner          = THIS_MODULE,
 720         .open           = wled_proc_open,
 721         .read           = seq_read,
 722         .llseek         = seq_lseek,
 723         .release        = single_release,
 724         .write          = wled_proc_write,
 725 };
 726
 727 /*
 728  * Proc handlers for Bluetooth
 729  */
 730 static int bluetooth_proc_show(struct seq_file *m, void *v)
 731 {
 732         seq_printf(m, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
 733         return 0;
 734 }
 735
 736 static int bluetooth_proc_open(struct inode *inode, struct file *file)
 737 {
 738         return single_open(file, bluetooth_proc_show, NULL);
 739 }
 740
 741 static ssize_t bluetooth_proc_write(struct file *file,
 742                 const char __user *buffer, size_t count, loff_t *pos)
 743 {
 744         /* Note: mt_bt_switch controls both internal Bluetooth adapter's
 745            presence and its LED */
 746         return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
 747 }
 748
 749 static const struct file_operations bluetooth_proc_fops = {
 750         .owner          = THIS_MODULE,
 751         .open           = bluetooth_proc_open,
 752         .read           = seq_read,
 753         .llseek         = seq_lseek,
 754         .release        = single_release,
 755         .write          = bluetooth_proc_write,
 756 };
 757
 758 /*
 759  * Proc handlers for TLED
 760  */
 761 static int tled_proc_show(struct seq_file *m, void *v)
 762 {
 763         seq_printf(m, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
 764         return 0;
 765 }
 766
 767 static int tled_proc_open(struct inode *inode, struct file *file)
 768 {
 769         return single_open(file, tled_proc_show, NULL);
 770 }
 771
 772 static ssize_t tled_proc_write(struct file *file, const char __user *buffer,
 773                 size_t count, loff_t *pos)
 774 {
 775         return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
 776 }
 777
 778 static const struct file_operations tled_proc_fops = {
 779         .owner          = THIS_MODULE,
 780         .open           = tled_proc_open,
 781         .read           = seq_read,
 782         .llseek         = seq_lseek,
 783         .release        = single_release,
 784         .write          = tled_proc_write,
 785 };
 786
 787 static int get_lcd_state(void)
 788 {
 789         int lcd = 0;
 790
 791         if (hotk->model == L3H) {
 792                 /* L3H and the like have to be handled differently */
 793                 acpi_status status = 0;
 794                 struct acpi_object_list input;
 795                 union acpi_object mt_params[2];
 796                 struct acpi_buffer output;
 797                 union acpi_object out_obj;
 798
 799                 input.count = 2;
 800                 input.pointer = mt_params;
 801                 /* Note: the following values are partly guessed up, but
 802                    otherwise they seem to work */
 803                 mt_params[0].type = ACPI_TYPE_INTEGER;
 804                 mt_params[0].integer.value = 0x02;
 805                 mt_params[1].type = ACPI_TYPE_INTEGER;
 806                 mt_params[1].integer.value = 0x02;
 807
 808                 output.length = sizeof(out_obj);
 809                 output.pointer = &out_obj;
 810
 811                 status =
 812                     acpi_evaluate_object(NULL, hotk->methods->lcd_status,
 813                                          &input, &output);
 814                 if (status != AE_OK)
 815                         return -1;
 816                 if (out_obj.type == ACPI_TYPE_INTEGER)
 817                         /* That's what the AML code does */
 818                         lcd = out_obj.integer.value >> 8;
 819         } else if (hotk->model == F3Sa) {
 820                 unsigned long long tmp;
 821                 union acpi_object param;
 822                 struct acpi_object_list input;
 823                 acpi_status status;
 824
 825                 /* Read pin 11 */
 826                 param.type = ACPI_TYPE_INTEGER;
 827                 param.integer.value = 0x11;
 828                 input.count = 1;
 829                 input.pointer = &param;
 830
 831                 status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
 832                                                 &input, &tmp);
 833                 if (status != AE_OK)
 834                         return -1;
 835
 836                 lcd = tmp;
 837         } else {
 838                 /* We don't have to check anything if we are here */
 839                 if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
 840                         printk(KERN_WARNING
 841                                "Asus ACPI: Error reading LCD status\n");
 842
 843                 if (hotk->model == L2D)
 844                         lcd = ~lcd;
 845         }
 846
 847         return (lcd & 1);
 848 }
 849
 850 static int set_lcd_state(int value)
 851 {
 852         int lcd = 0;
 853         acpi_status status = 0;
 854
 855         lcd = value ? 1 : 0;
 856         if (lcd != get_lcd_state()) {
 857                 /* switch */
 858                 if (hotk->model != L3H) {
 859                         status =
 860                             acpi_evaluate_object(NULL,
 861                                                  hotk->methods->mt_lcd_switch,
 862                                                  NULL, NULL);
 863                 } else {
 864                         /* L3H and the like must be handled differently */
 865                         if (!write_acpi_int
 866                             (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
 867                              NULL))
 868                                 status = AE_ERROR;
 869                         /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
 870                            the exact behaviour is simulated here */
 871                 }
 872                 if (ACPI_FAILURE(status))
 873                         printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
 874         }
 875         return 0;
 876
 877 }
 878
 879 static int lcd_proc_show(struct seq_file *m, void *v)
 880 {
 881         seq_printf(m, "%d\n", get_lcd_state());
 882         return 0;
 883 }
 884
 885 static int lcd_proc_open(struct inode *inode, struct file *file)
 886 {
 887         return single_open(file, lcd_proc_show, NULL);
 888 }
 889
 890 static ssize_t lcd_proc_write(struct file *file, const char __user *buffer,
 891                size_t count, loff_t *pos)
 892 {
 893         int rv, value;
 894
 895         rv = parse_arg(buffer, count, &value);
 896         if (rv > 0)
 897                 set_lcd_state(value);
 898         return rv;
 899 }
 900
 901 static const struct file_operations lcd_proc_fops = {
 902         .owner          = THIS_MODULE,
 903         .open           = lcd_proc_open,
 904         .read           = seq_read,
 905         .llseek         = seq_lseek,
 906         .release        = single_release,
 907         .write          = lcd_proc_write,
 908 };
 909
 910 static int read_brightness(struct backlight_device *bd)
 911 {
 912         int value;
 913
 914         if (hotk->methods->brightness_get) {    /* SPLV/GPLV laptop */
 915                 if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
 916                                    &value))
 917                         printk(KERN_WARNING
 918                                "Asus ACPI: Error reading brightness\n");
 919         } else if (hotk->methods->brightness_status) {  /* For D1 for example */
 920                 if (!read_acpi_int(NULL, hotk->methods->brightness_status,
 921                                    &value))
 922                         printk(KERN_WARNING
 923                                "Asus ACPI: Error reading brightness\n");
 924         } else                  /* No GPLV method */
 925                 value = hotk->brightness;
 926         return value;
 927 }
 928
 929 /*
 930  * Change the brightness level
 931  */
 932 static int set_brightness(int value)
 933 {
 934         acpi_status status = 0;
 935         int ret = 0;
 936
 937         /* SPLV laptop */
 938         if (hotk->methods->brightness_set) {
 939                 if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
 940                                     value, NULL))
 941                         printk(KERN_WARNING
 942                                "Asus ACPI: Error changing brightness\n");
 943                         ret = -EIO;
 944                 goto out;
 945         }
 946
 947         /* No SPLV method if we are here, act as appropriate */
 948         value -= read_brightness(NULL);
 949         while (value != 0) {
 950                 status = acpi_evaluate_object(NULL, (value > 0) ?
 951                                               hotk->methods->brightness_up :
 952                                               hotk->methods->brightness_down,
 953                                               NULL, NULL);
 954                 (value > 0) ? value-- : value++;
 955                 if (ACPI_FAILURE(status))
 956                         printk(KERN_WARNING
 957                                "Asus ACPI: Error changing brightness\n");
 958                         ret = -EIO;
 959         }
 960 out:
 961         return ret;
 962 }
 963
 964 static int set_brightness_status(struct backlight_device *bd)
 965 {
 966         return set_brightness(bd->props.brightness);
 967 }
 968
 969 static int brn_proc_show(struct seq_file *m, void *v)
 970 {
 971         seq_printf(m, "%d\n", read_brightness(NULL));
 972         return 0;
 973 }
 974
 975 static int brn_proc_open(struct inode *inode, struct file *file)
 976 {
 977         return single_open(file, brn_proc_show, NULL);
 978 }
 979
 980 static ssize_t brn_proc_write(struct file *file, const char __user *buffer,
 981                size_t count, loff_t *pos)
 982 {
 983         int rv, value;
 984
 985         rv = parse_arg(buffer, count, &value);
 986         if (rv > 0) {
 987                 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
 988                 /* 0 <= value <= 15 */
 989                 set_brightness(value);
 990         }
 991         return rv;
 992 }
 993
 994 static const struct file_operations brn_proc_fops = {
 995         .owner          = THIS_MODULE,
 996         .open           = brn_proc_open,
 997         .read           = seq_read,
 998         .llseek         = seq_lseek,
 999         .release        = single_release,
1000         .write          = brn_proc_write,
1001 };
1002
1003 static void set_display(int value)
1004 {
1005         /* no sanity check needed for now */
1006         if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
1007                             value, NULL))
1008                 printk(KERN_WARNING "Asus ACPI: Error setting display\n");
1009         return;
1010 }
1011
1012 /*
1013  * Now, *this* one could be more user-friendly, but so far, no-one has
1014  * complained. The significance of bits is the same as in proc_write_disp()
1015  */
1016 static int disp_proc_show(struct seq_file *m, void *v)
1017 {
1018         int value = 0;
1019
1020         if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
1021                 printk(KERN_WARNING
1022                        "Asus ACPI: Error reading display status\n");
1023         value &= 0x07;  /* needed for some models, shouldn't hurt others */
1024         seq_printf(m, "%d\n", value);
1025         return 0;
1026 }
1027
1028 static int disp_proc_open(struct inode *inode, struct file *file)
1029 {
1030         return single_open(file, disp_proc_show, NULL);
1031 }
1032
1033 /*
1034  * Experimental support for display switching. As of now: 1 should activate
1035  * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
1036  * (bitwise) of these will suffice. I never actually tested 3 displays hooked
1037  * up simultaneously, so be warned. See the acpi4asus README for more info.
1038  */
1039 static ssize_t disp_proc_write(struct file *file, const char __user *buffer,
1040                 size_t count, loff_t *pos)
1041 {
1042         int rv, value;
1043
1044         rv = parse_arg(buffer, count, &value);
1045         if (rv > 0)
1046                 set_display(value);
1047         return rv;
1048 }
1049
1050 static const struct file_operations disp_proc_fops = {
1051         .owner          = THIS_MODULE,
1052         .open           = disp_proc_open,
1053         .read           = seq_read,
1054         .llseek         = seq_lseek,
1055         .release        = single_release,
1056         .write          = disp_proc_write,
1057 };
1058
1059 static int
1060 asus_proc_add(char *name, const struct file_operations *proc_fops, mode_t mode,
1061                      struct acpi_device *device)
1062 {
1063         struct proc_dir_entry *proc;
1064
1065         proc = proc_create_data(name, mode, acpi_device_dir(device),
1066                                 proc_fops, acpi_driver_data(device));
1067         if (!proc) {
1068                 printk(KERN_WARNING "  Unable to create %s fs entry\n", name);
1069                 return -1;
1070         }
1071         proc->uid = asus_uid;
1072         proc->gid = asus_gid;
1073         return 0;
1074 }
1075
1076 static int asus_hotk_add_fs(struct acpi_device *device)
1077 {
1078         struct proc_dir_entry *proc;
1079         mode_t mode;
1080
1081         /*
1082          * If parameter uid or gid is not changed, keep the default setting for
1083          * our proc entries (-rw-rw-rw-) else, it means we care about security,
1084          * and then set to -rw-rw----
1085          */
1086
1087         if ((asus_uid == 0) && (asus_gid == 0)) {
1088                 mode = S_IFREG | S_IRUGO | S_IWUGO;
1089         } else {
1090                 mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
1091                 printk(KERN_WARNING "  asus_uid and asus_gid parameters are "
1092                        "deprecated, use chown and chmod instead!\n");
1093         }
1094
1095         acpi_device_dir(device) = asus_proc_dir;
1096         if (!acpi_device_dir(device))
1097                 return -ENODEV;
1098
1099         proc = proc_create(PROC_INFO, mode, acpi_device_dir(device),
1100                            &asus_info_proc_fops);
1101         if (proc) {
1102                 proc->uid = asus_uid;
1103                 proc->gid = asus_gid;
1104         } else {
1105                 printk(KERN_WARNING "  Unable to create " PROC_INFO
1106                        " fs entry\n");
1107         }
1108
1109         if (hotk->methods->mt_wled) {
1110                 asus_proc_add(PROC_WLED, &wled_proc_fops, mode, device);
1111         }
1112
1113         if (hotk->methods->mt_ledd) {
1114                 asus_proc_add(PROC_LEDD, &ledd_proc_fops, mode, device);
1115         }
1116
1117         if (hotk->methods->mt_mled) {
1118                 asus_proc_add(PROC_MLED, &mled_proc_fops, mode, device);
1119         }
1120
1121         if (hotk->methods->mt_tled) {
1122                 asus_proc_add(PROC_TLED, &tled_proc_fops, mode, device);
1123         }
1124
1125         if (hotk->methods->mt_bt_switch) {
1126                 asus_proc_add(PROC_BT, &bluetooth_proc_fops, mode, device);
1127         }
1128
1129         /*
1130          * We need both read node and write method as LCD switch is also
1131          * accessible from the keyboard
1132          */
1133         if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
1134                 asus_proc_add(PROC_LCD, &lcd_proc_fops, mode, device);
1135         }
1136
1137         if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
1138             (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
1139                 asus_proc_add(PROC_BRN, &brn_proc_fops, mode, device);
1140         }
1141
1142         if (hotk->methods->display_set) {
1143                 asus_proc_add(PROC_DISP, &disp_proc_fops, mode, device);
1144         }
1145
1146         return 0;
1147 }
1148
1149 static int asus_hotk_remove_fs(struct acpi_device *device)
1150 {
1151         if (acpi_device_dir(device)) {
1152                 remove_proc_entry(PROC_INFO, acpi_device_dir(device));
1153                 if (hotk->methods->mt_wled)
1154                         remove_proc_entry(PROC_WLED, acpi_device_dir(device));
1155                 if (hotk->methods->mt_mled)
1156                         remove_proc_entry(PROC_MLED, acpi_device_dir(device));
1157                 if (hotk->methods->mt_tled)
1158                         remove_proc_entry(PROC_TLED, acpi_device_dir(device));
1159                 if (hotk->methods->mt_ledd)
1160                         remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
1161                 if (hotk->methods->mt_bt_switch)
1162                         remove_proc_entry(PROC_BT, acpi_device_dir(device));
1163                 if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
1164                         remove_proc_entry(PROC_LCD, acpi_device_dir(device));
1165                 if ((hotk->methods->brightness_up
1166                      && hotk->methods->brightness_down)
1167                     || (hotk->methods->brightness_get
1168                         && hotk->methods->brightness_set))
1169                         remove_proc_entry(PROC_BRN, acpi_device_dir(device));
1170                 if (hotk->methods->display_set)
1171                         remove_proc_entry(PROC_DISP, acpi_device_dir(device));
1172         }
1173         return 0;
1174 }
1175
1176 static void asus_hotk_notify(struct acpi_device *device, u32 event)
1177 {
1178         /* TODO Find a better way to handle events count. */
1179         if (!hotk)
1180                 return;
1181
1182         /*
1183          * The BIOS *should* be sending us device events, but apparently
1184          * Asus uses system events instead, so just ignore any device
1185          * events we get.
1186          */
1187         if (event > ACPI_MAX_SYS_NOTIFY)
1188                 return;
1189
1190         if ((event & ~((u32) BR_UP)) < 16)
1191                 hotk->brightness = (event & ~((u32) BR_UP));
1192         else if ((event & ~((u32) BR_DOWN)) < 16)
1193                 hotk->brightness = (event & ~((u32) BR_DOWN));
1194
1195         acpi_bus_generate_proc_event(hotk->device, event,
1196                                 hotk->event_count[event % 128]++);
1197
1198         return;
1199 }
1200
1201 /*
1202  * Match the model string to the list of supported models. Return END_MODEL if
1203  * no match or model is NULL.
1204  */
1205 static int asus_model_match(char *model)
1206 {
1207         if (model == NULL)
1208                 return END_MODEL;
1209
1210         if (strncmp(model, "L3D", 3) == 0)
1211                 return L3D;
1212         else if (strncmp(model, "L2E", 3) == 0 ||
1213                  strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
1214                 return L3H;
1215         else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
1216                 return L3C;
1217         else if (strncmp(model, "L8L", 3) == 0)
1218                 return L8L;
1219         else if (strncmp(model, "L4R", 3) == 0)
1220                 return L4R;
1221         else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
1222                 return M6N;
1223         else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
1224                 return M6R;
1225         else if (strncmp(model, "M2N", 3) == 0 ||
1226                  strncmp(model, "M3N", 3) == 0 ||
1227                  strncmp(model, "M5N", 3) == 0 ||
1228                  strncmp(model, "M6N", 3) == 0 ||
1229                  strncmp(model, "S1N", 3) == 0 ||
1230                  strncmp(model, "S5N", 3) == 0 || strncmp(model, "W1N", 3) == 0)
1231                 return xxN;
1232         else if (strncmp(model, "M1", 2) == 0)
1233                 return M1A;
1234         else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
1235                 return M2E;
1236         else if (strncmp(model, "L2", 2) == 0)
1237                 return L2D;
1238         else if (strncmp(model, "L8", 2) == 0)
1239                 return S1x;
1240         else if (strncmp(model, "D1", 2) == 0)
1241                 return D1x;
1242         else if (strncmp(model, "A1", 2) == 0)
1243                 return A1x;
1244         else if (strncmp(model, "A2", 2) == 0)
1245                 return A2x;
1246         else if (strncmp(model, "J1", 2) == 0)
1247                 return S2x;
1248         else if (strncmp(model, "L5", 2) == 0)
1249                 return L5x;
1250         else if (strncmp(model, "A4G", 3) == 0)
1251                 return A4G;
1252         else if (strncmp(model, "W1N", 3) == 0)
1253                 return W1N;
1254         else if (strncmp(model, "W3V", 3) == 0)
1255                 return W3V;
1256         else if (strncmp(model, "W5A", 3) == 0)
1257                 return W5A;
1258         else if (strncmp(model, "R1F", 3) == 0)
1259                 return R1F;
1260         else if (strncmp(model, "A4S", 3) == 0)
1261                 return A4S;
1262         else if (strncmp(model, "F3Sa", 4) == 0)
1263                 return F3Sa;
1264         else
1265                 return END_MODEL;
1266 }
1267
1268 /*
1269  * This function is used to initialize the hotk with right values. In this
1270  * method, we can make all the detection we want, and modify the hotk struct
1271  */
1272 static int asus_hotk_get_info(void)
1273 {
1274         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1275         union acpi_object *model = NULL;
1276         int bsts_result;
1277         char *string = NULL;
1278         acpi_status status;
1279
1280         /*
1281          * Get DSDT headers early enough to allow for differentiating between
1282          * models, but late enough to allow acpi_bus_register_driver() to fail
1283          * before doing anything ACPI-specific. Should we encounter a machine,
1284          * which needs special handling (i.e. its hotkey device has a different
1285          * HID), this bit will be moved. A global variable asus_info contains
1286          * the DSDT header.
1287          */
1288         status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
1289         if (ACPI_FAILURE(status))
1290                 printk(KERN_WARNING "  Couldn't get the DSDT table header\n");
1291
1292         /* We have to write 0 on init this far for all ASUS models */
1293         if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
1294                 printk(KERN_ERR "  Hotkey initialization failed\n");
1295                 return -ENODEV;
1296         }
1297
1298         /* This needs to be called for some laptops to init properly */
1299         if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
1300                 printk(KERN_WARNING "  Error calling BSTS\n");
1301         else if (bsts_result)
1302                 printk(KERN_NOTICE "  BSTS called, 0x%02x returned\n",
1303                        bsts_result);
1304
1305         /*
1306          * Try to match the object returned by INIT to the specific model.
1307          * Handle every possible object (or the lack of thereof) the DSDT
1308          * writers might throw at us. When in trouble, we pass NULL to
1309          * asus_model_match() and try something completely different.
1310          */
1311         if (buffer.pointer) {
1312                 model = buffer.pointer;
1313                 switch (model->type) {
1314                 case ACPI_TYPE_STRING:
1315                         string = model->string.pointer;
1316                         break;
1317                 case ACPI_TYPE_BUFFER:
1318                         string = model->buffer.pointer;
1319                         break;
1320                 default:
1321                         kfree(model);
1322                         model = NULL;
1323                         break;
1324                 }
1325         }
1326         hotk->model = asus_model_match(string);
1327         if (hotk->model == END_MODEL) { /* match failed */
1328                 if (asus_info &&
1329                     strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
1330                         hotk->model = P30;
1331                         printk(KERN_NOTICE
1332                                "  Samsung P30 detected, supported\n");
1333                 } else {
1334                         hotk->model = M2E;
1335                         printk(KERN_NOTICE "  unsupported model %s, trying "
1336                                "default values\n", string);
1337                         printk(KERN_NOTICE
1338                                "  send /proc/acpi/dsdt to the developers\n");
1339                         kfree(model);
1340                         return -ENODEV;
1341                 }
1342                 hotk->methods = &model_conf[hotk->model];
1343                 return AE_OK;
1344         }
1345         hotk->methods = &model_conf[hotk->model];
1346         printk(KERN_NOTICE "  %s model detected, supported\n", string);
1347
1348         /* Sort of per-model blacklist */
1349         if (strncmp(string, "L2B", 3) == 0)
1350                 hotk->methods->lcd_status = NULL;
1351         /* L2B is similar enough to L3C to use its settings, with this only
1352            exception */
1353         else if (strncmp(string, "A3G", 3) == 0)
1354                 hotk->methods->lcd_status = "\\BLFG";
1355         /* A3G is like M6R */
1356         else if (strncmp(string, "S5N", 3) == 0 ||
1357                  strncmp(string, "M5N", 3) == 0 ||
1358                  strncmp(string, "W3N", 3) == 0)
1359                 hotk->methods->mt_mled = NULL;
1360         /* S5N, M5N and W3N have no MLED */
1361         else if (strncmp(string, "L5D", 3) == 0)
1362                 hotk->methods->mt_wled = NULL;
1363         /* L5D's WLED is not controlled by ACPI */
1364         else if (strncmp(string, "M2N", 3) == 0 ||
1365                  strncmp(string, "W3V", 3) == 0 ||
1366                  strncmp(string, "S1N", 3) == 0)
1367                 hotk->methods->mt_wled = "WLED";
1368         /* M2N, S1N and W3V have a usable WLED */
1369         else if (asus_info) {
1370                 if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
1371                         hotk->methods->mled_status = NULL;
1372                 /* S1300A reports L84F, but L1400B too, account for that */
1373         }
1374
1375         kfree(model);
1376
1377         return AE_OK;
1378 }
1379
1380 static int asus_hotk_check(void)
1381 {
1382         int result = 0;
1383
1384         result = acpi_bus_get_status(hotk->device);
1385         if (result)
1386                 return result;
1387
1388         if (hotk->device->status.present) {
1389                 result = asus_hotk_get_info();
1390         } else {
1391                 printk(KERN_ERR "  Hotkey device not present, aborting\n");
1392                 return -EINVAL;
1393         }
1394
1395         return result;
1396 }
1397
1398 static int asus_hotk_found;
1399
1400 static int asus_hotk_add(struct acpi_device *device)
1401 {
1402         acpi_status status = AE_OK;
1403         int result;
1404
1405         printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
1406                ASUS_ACPI_VERSION);
1407
1408         hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
1409         if (!hotk)
1410                 return -ENOMEM;
1411
1412         hotk->handle = device->handle;
1413         strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
1414         strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
1415         device->driver_data = hotk;
1416         hotk->device = device;
1417
1418         result = asus_hotk_check();
1419         if (result)
1420                 goto end;
1421
1422         result = asus_hotk_add_fs(device);
1423         if (result)
1424                 goto end;
1425
1426         /* For laptops without GPLV: init the hotk->brightness value */
1427         if ((!hotk->methods->brightness_get)
1428             && (!hotk->methods->brightness_status)
1429             && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
1430                 status =
1431                     acpi_evaluate_object(NULL, hotk->methods->brightness_down,
1432                                          NULL, NULL);
1433                 if (ACPI_FAILURE(status))
1434                         printk(KERN_WARNING "  Error changing brightness\n");
1435                 else {
1436                         status =
1437                             acpi_evaluate_object(NULL,
1438                                                  hotk->methods->brightness_up,
1439                                                  NULL, NULL);
1440                         if (ACPI_FAILURE(status))
1441                                 printk(KERN_WARNING "  Strange, error changing"
1442                                        " brightness\n");
1443                 }
1444         }
1445
1446         asus_hotk_found = 1;
1447
1448         /* LED display is off by default */
1449         hotk->ledd_status = 0xFFF;
1450
1451 end:
1452         if (result)
1453                 kfree(hotk);
1454
1455         return result;
1456 }
1457
1458 static int asus_hotk_remove(struct acpi_device *device, int type)
1459 {
1460         asus_hotk_remove_fs(device);
1461
1462         kfree(hotk);
1463
1464         return 0;
1465 }
1466
1467 static struct backlight_ops asus_backlight_data = {
1468         .get_brightness = read_brightness,
1469         .update_status  = set_brightness_status,
1470 };
1471
1472 static void asus_acpi_exit(void)
1473 {
1474         if (asus_backlight_device)
1475                 backlight_device_unregister(asus_backlight_device);
1476
1477         acpi_bus_unregister_driver(&asus_hotk_driver);
1478         remove_proc_entry(PROC_ASUS, acpi_root_dir);
1479
1480         return;
1481 }
1482
1483 static int __init asus_acpi_init(void)
1484 {
1485         int result;
1486
1487         result = acpi_bus_register_driver(&asus_hotk_driver);
1488         if (result < 0)
1489                 return result;
1490
1491         asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
1492         if (!asus_proc_dir) {
1493                 printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
1494                 acpi_bus_unregister_driver(&asus_hotk_driver);
1495                 return -ENODEV;
1496         }
1497
1498         /*
1499          * This is a bit of a kludge.  We only want this module loaded
1500          * for ASUS systems, but there's currently no way to probe the
1501          * ACPI namespace for ASUS HIDs.  So we just return failure if
1502          * we didn't find one, which will cause the module to be
1503          * unloaded.
1504          */
1505         if (!asus_hotk_found) {
1506                 acpi_bus_unregister_driver(&asus_hotk_driver);
1507                 remove_proc_entry(PROC_ASUS, acpi_root_dir);
1508                 return -ENODEV;
1509         }
1510
1511         asus_backlight_device = backlight_device_register("asus", NULL, NULL,
1512                                                           &asus_backlight_data);
1513         if (IS_ERR(asus_backlight_device)) {
1514                 printk(KERN_ERR "Could not register asus backlight device\n");
1515                 asus_backlight_device = NULL;
1516                 asus_acpi_exit();
1517                 return -ENODEV;
1518         }
1519         asus_backlight_device->props.max_brightness = 15;
1520
1521         return 0;
1522 }
1523
1524 module_init(asus_acpi_init);
1525 module_exit(asus_acpi_exit);