git.oblomov.eu Git - linux-2.6/blob - drivers/platform/x86/eeepc-laptop.c

   1 /*
   2  *  eepc-laptop.c - Asus Eee PC extras
   3  *
   4  *  Based on asus_acpi.c as patched for the Eee PC by Asus:
   5  *  ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
   6  *  Based on eee.c from eeepc-linux
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/types.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/backlight.h>
  25 #include <linux/fb.h>
  26 #include <linux/hwmon.h>
  27 #include <linux/hwmon-sysfs.h>
  28 #include <acpi/acpi_drivers.h>
  29 #include <acpi/acpi_bus.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/input.h>
  32 #include <linux/rfkill.h>
  33 #include <linux/pci.h>
  34
  35 #define EEEPC_LAPTOP_VERSION    "0.1"
  36
  37 #define EEEPC_HOTK_NAME         "Eee PC Hotkey Driver"
  38 #define EEEPC_HOTK_FILE         "eeepc"
  39 #define EEEPC_HOTK_CLASS        "hotkey"
  40 #define EEEPC_HOTK_DEVICE_NAME  "Hotkey"
  41 #define EEEPC_HOTK_HID          "ASUS010"
  42
  43 #define EEEPC_LOG       EEEPC_HOTK_FILE ": "
  44 #define EEEPC_ERR       KERN_ERR        EEEPC_LOG
  45 #define EEEPC_WARNING   KERN_WARNING    EEEPC_LOG
  46 #define EEEPC_NOTICE    KERN_NOTICE     EEEPC_LOG
  47 #define EEEPC_INFO      KERN_INFO       EEEPC_LOG
  48
  49 /*
  50  * Definitions for Asus EeePC
  51  */
  52 #define NOTIFY_WLAN_ON  0x10
  53 #define NOTIFY_BRN_MIN  0x20
  54 #define NOTIFY_BRN_MAX  0x2f
  55
  56 enum {
  57         DISABLE_ASL_WLAN = 0x0001,
  58         DISABLE_ASL_BLUETOOTH = 0x0002,
  59         DISABLE_ASL_IRDA = 0x0004,
  60         DISABLE_ASL_CAMERA = 0x0008,
  61         DISABLE_ASL_TV = 0x0010,
  62         DISABLE_ASL_GPS = 0x0020,
  63         DISABLE_ASL_DISPLAYSWITCH = 0x0040,
  64         DISABLE_ASL_MODEM = 0x0080,
  65         DISABLE_ASL_CARDREADER = 0x0100
  66 };
  67
  68 enum {
  69         CM_ASL_WLAN = 0,
  70         CM_ASL_BLUETOOTH,
  71         CM_ASL_IRDA,
  72         CM_ASL_1394,
  73         CM_ASL_CAMERA,
  74         CM_ASL_TV,
  75         CM_ASL_GPS,
  76         CM_ASL_DVDROM,
  77         CM_ASL_DISPLAYSWITCH,
  78         CM_ASL_PANELBRIGHT,
  79         CM_ASL_BIOSFLASH,
  80         CM_ASL_ACPIFLASH,
  81         CM_ASL_CPUFV,
  82         CM_ASL_CPUTEMPERATURE,
  83         CM_ASL_FANCPU,
  84         CM_ASL_FANCHASSIS,
  85         CM_ASL_USBPORT1,
  86         CM_ASL_USBPORT2,
  87         CM_ASL_USBPORT3,
  88         CM_ASL_MODEM,
  89         CM_ASL_CARDREADER,
  90         CM_ASL_LID
  91 };
  92
  93 static const char *cm_getv[] = {
  94         "WLDG", "BTHG", NULL, NULL,
  95         "CAMG", NULL, NULL, NULL,
  96         NULL, "PBLG", NULL, NULL,
  97         "CFVG", NULL, NULL, NULL,
  98         "USBG", NULL, NULL, "MODG",
  99         "CRDG", "LIDG"
 100 };
 101
 102 static const char *cm_setv[] = {
 103         "WLDS", "BTHS", NULL, NULL,
 104         "CAMS", NULL, NULL, NULL,
 105         "SDSP", "PBLS", "HDPS", NULL,
 106         "CFVS", NULL, NULL, NULL,
 107         "USBG", NULL, NULL, "MODS",
 108         "CRDS", NULL
 109 };
 110
 111 #define EEEPC_EC        "\\_SB.PCI0.SBRG.EC0."
 112
 113 #define EEEPC_EC_FAN_PWM        EEEPC_EC "SC02" /* Fan PWM duty cycle (%) */
 114 #define EEEPC_EC_SC02           0x63
 115 #define EEEPC_EC_FAN_HRPM       EEEPC_EC "SC05" /* High byte, fan speed (RPM) */
 116 #define EEEPC_EC_FAN_LRPM       EEEPC_EC "SC06" /* Low byte, fan speed (RPM) */
 117 #define EEEPC_EC_FAN_CTRL       EEEPC_EC "SFB3" /* Byte containing SF25  */
 118 #define EEEPC_EC_SFB3           0xD3
 119
 120 /*
 121  * This is the main structure, we can use it to store useful information
 122  * about the hotk device
 123  */
 124 struct eeepc_hotk {
 125         struct acpi_device *device;     /* the device we are in */
 126         acpi_handle handle;             /* the handle of the hotk device */
 127         u32 cm_supported;               /* the control methods supported
 128                                            by this BIOS */
 129         uint init_flag;                 /* Init flags */
 130         u16 event_count[128];           /* count for each event */
 131         struct input_dev *inputdev;
 132         u16 *keycode_map;
 133         struct rfkill *eeepc_wlan_rfkill;
 134         struct rfkill *eeepc_bluetooth_rfkill;
 135 };
 136
 137 /* The actual device the driver binds to */
 138 static struct eeepc_hotk *ehotk;
 139
 140 /* Platform device/driver */
 141 static struct platform_driver platform_driver = {
 142         .driver = {
 143                 .name = EEEPC_HOTK_FILE,
 144                 .owner = THIS_MODULE,
 145         }
 146 };
 147
 148 static struct platform_device *platform_device;
 149
 150 struct key_entry {
 151         char type;
 152         u8 code;
 153         u16 keycode;
 154 };
 155
 156 enum { KE_KEY, KE_END };
 157
 158 static struct key_entry eeepc_keymap[] = {
 159         /* Sleep already handled via generic ACPI code */
 160         {KE_KEY, 0x10, KEY_WLAN },
 161         {KE_KEY, 0x12, KEY_PROG1 },
 162         {KE_KEY, 0x13, KEY_MUTE },
 163         {KE_KEY, 0x14, KEY_VOLUMEDOWN },
 164         {KE_KEY, 0x15, KEY_VOLUMEUP },
 165         {KE_KEY, 0x1a, KEY_COFFEE },
 166         {KE_KEY, 0x1b, KEY_ZOOM },
 167         {KE_KEY, 0x1c, KEY_PROG2 },
 168         {KE_KEY, 0x1d, KEY_PROG3 },
 169         {KE_KEY, NOTIFY_BRN_MIN,     KEY_BRIGHTNESSDOWN },
 170         {KE_KEY, NOTIFY_BRN_MIN + 2, KEY_BRIGHTNESSUP },
 171         {KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
 172         {KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
 173         {KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
 174         {KE_END, 0},
 175 };
 176
 177 /*
 178  * The hotkey driver declaration
 179  */
 180 static int eeepc_hotk_add(struct acpi_device *device);
 181 static int eeepc_hotk_remove(struct acpi_device *device, int type);
 182
 183 static const struct acpi_device_id eeepc_device_ids[] = {
 184         {EEEPC_HOTK_HID, 0},
 185         {"", 0},
 186 };
 187 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
 188
 189 static struct acpi_driver eeepc_hotk_driver = {
 190         .name = EEEPC_HOTK_NAME,
 191         .class = EEEPC_HOTK_CLASS,
 192         .ids = eeepc_device_ids,
 193         .ops = {
 194                 .add = eeepc_hotk_add,
 195                 .remove = eeepc_hotk_remove,
 196         },
 197 };
 198
 199 /* The backlight device /sys/class/backlight */
 200 static struct backlight_device *eeepc_backlight_device;
 201
 202 /* The hwmon device */
 203 static struct device *eeepc_hwmon_device;
 204
 205 /*
 206  * The backlight class declaration
 207  */
 208 static int read_brightness(struct backlight_device *bd);
 209 static int update_bl_status(struct backlight_device *bd);
 210 static struct backlight_ops eeepcbl_ops = {
 211         .get_brightness = read_brightness,
 212         .update_status = update_bl_status,
 213 };
 214
 215 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
 216 MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
 217 MODULE_LICENSE("GPL");
 218
 219 /*
 220  * ACPI Helpers
 221  */
 222 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 223                           struct acpi_buffer *output)
 224 {
 225         struct acpi_object_list params;
 226         union acpi_object in_obj;
 227         acpi_status status;
 228
 229         params.count = 1;
 230         params.pointer = &in_obj;
 231         in_obj.type = ACPI_TYPE_INTEGER;
 232         in_obj.integer.value = val;
 233
 234         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 235         return (status == AE_OK ? 0 : -1);
 236 }
 237
 238 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 239 {
 240         acpi_status status;
 241         unsigned long long result;
 242
 243         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 244         if (ACPI_FAILURE(status)) {
 245                 *val = -1;
 246                 return -1;
 247         } else {
 248                 *val = result;
 249                 return 0;
 250         }
 251 }
 252
 253 static int set_acpi(int cm, int value)
 254 {
 255         if (ehotk->cm_supported & (0x1 << cm)) {
 256                 const char *method = cm_setv[cm];
 257                 if (method == NULL)
 258                         return -ENODEV;
 259                 if (write_acpi_int(ehotk->handle, method, value, NULL))
 260                         printk(EEEPC_WARNING "Error writing %s\n", method);
 261         }
 262         return 0;
 263 }
 264
 265 static int get_acpi(int cm)
 266 {
 267         int value = -1;
 268         if ((ehotk->cm_supported & (0x1 << cm))) {
 269                 const char *method = cm_getv[cm];
 270                 if (method == NULL)
 271                         return -ENODEV;
 272                 if (read_acpi_int(ehotk->handle, method, &value))
 273                         printk(EEEPC_WARNING "Error reading %s\n", method);
 274         }
 275         return value;
 276 }
 277
 278 /*
 279  * Backlight
 280  */
 281 static int read_brightness(struct backlight_device *bd)
 282 {
 283         return get_acpi(CM_ASL_PANELBRIGHT);
 284 }
 285
 286 static int set_brightness(struct backlight_device *bd, int value)
 287 {
 288         value = max(0, min(15, value));
 289         return set_acpi(CM_ASL_PANELBRIGHT, value);
 290 }
 291
 292 static int update_bl_status(struct backlight_device *bd)
 293 {
 294         return set_brightness(bd, bd->props.brightness);
 295 }
 296
 297 /*
 298  * Rfkill helpers
 299  */
 300
 301 static int eeepc_wlan_rfkill_set(void *data, enum rfkill_state state)
 302 {
 303         if (state == RFKILL_STATE_SOFT_BLOCKED)
 304                 return set_acpi(CM_ASL_WLAN, 0);
 305         else
 306                 return set_acpi(CM_ASL_WLAN, 1);
 307 }
 308
 309 static int eeepc_wlan_rfkill_state(void *data, enum rfkill_state *state)
 310 {
 311         if (get_acpi(CM_ASL_WLAN) == 1)
 312                 *state = RFKILL_STATE_UNBLOCKED;
 313         else
 314                 *state = RFKILL_STATE_SOFT_BLOCKED;
 315         return 0;
 316 }
 317
 318 static int eeepc_bluetooth_rfkill_set(void *data, enum rfkill_state state)
 319 {
 320         if (state == RFKILL_STATE_SOFT_BLOCKED)
 321                 return set_acpi(CM_ASL_BLUETOOTH, 0);
 322         else
 323                 return set_acpi(CM_ASL_BLUETOOTH, 1);
 324 }
 325
 326 static int eeepc_bluetooth_rfkill_state(void *data, enum rfkill_state *state)
 327 {
 328         if (get_acpi(CM_ASL_BLUETOOTH) == 1)
 329                 *state = RFKILL_STATE_UNBLOCKED;
 330         else
 331                 *state = RFKILL_STATE_SOFT_BLOCKED;
 332         return 0;
 333 }
 334
 335 /*
 336  * Sys helpers
 337  */
 338 static int parse_arg(const char *buf, unsigned long count, int *val)
 339 {
 340         if (!count)
 341                 return 0;
 342         if (sscanf(buf, "%i", val) != 1)
 343                 return -EINVAL;
 344         return count;
 345 }
 346
 347 static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
 348 {
 349         int rv, value;
 350
 351         rv = parse_arg(buf, count, &value);
 352         if (rv > 0)
 353                 set_acpi(cm, value);
 354         return rv;
 355 }
 356
 357 static ssize_t show_sys_acpi(int cm, char *buf)
 358 {
 359         return sprintf(buf, "%d\n", get_acpi(cm));
 360 }
 361
 362 #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm)                            \
 363         static ssize_t show_##_name(struct device *dev,                 \
 364                                     struct device_attribute *attr,      \
 365                                     char *buf)                          \
 366         {                                                               \
 367                 return show_sys_acpi(_cm, buf);                         \
 368         }                                                               \
 369         static ssize_t store_##_name(struct device *dev,                \
 370                                      struct device_attribute *attr,     \
 371                                      const char *buf, size_t count)     \
 372         {                                                               \
 373                 return store_sys_acpi(_cm, buf, count);                 \
 374         }                                                               \
 375         static struct device_attribute dev_attr_##_name = {             \
 376                 .attr = {                                               \
 377                         .name = __stringify(_name),                     \
 378                         .mode = 0644 },                                 \
 379                 .show   = show_##_name,                                 \
 380                 .store  = store_##_name,                                \
 381         }
 382
 383 EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
 384 EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
 385 EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
 386
 387 static struct attribute *platform_attributes[] = {
 388         &dev_attr_camera.attr,
 389         &dev_attr_cardr.attr,
 390         &dev_attr_disp.attr,
 391         NULL
 392 };
 393
 394 static struct attribute_group platform_attribute_group = {
 395         .attrs = platform_attributes
 396 };
 397
 398 /*
 399  * Hotkey functions
 400  */
 401 static struct key_entry *eepc_get_entry_by_scancode(int code)
 402 {
 403         struct key_entry *key;
 404
 405         for (key = eeepc_keymap; key->type != KE_END; key++)
 406                 if (code == key->code)
 407                         return key;
 408
 409         return NULL;
 410 }
 411
 412 static struct key_entry *eepc_get_entry_by_keycode(int code)
 413 {
 414         struct key_entry *key;
 415
 416         for (key = eeepc_keymap; key->type != KE_END; key++)
 417                 if (code == key->keycode && key->type == KE_KEY)
 418                         return key;
 419
 420         return NULL;
 421 }
 422
 423 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
 424 {
 425         struct key_entry *key = eepc_get_entry_by_scancode(scancode);
 426
 427         if (key && key->type == KE_KEY) {
 428                 *keycode = key->keycode;
 429                 return 0;
 430         }
 431
 432         return -EINVAL;
 433 }
 434
 435 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 436 {
 437         struct key_entry *key;
 438         int old_keycode;
 439
 440         if (keycode < 0 || keycode > KEY_MAX)
 441                 return -EINVAL;
 442
 443         key = eepc_get_entry_by_scancode(scancode);
 444         if (key && key->type == KE_KEY) {
 445                 old_keycode = key->keycode;
 446                 key->keycode = keycode;
 447                 set_bit(keycode, dev->keybit);
 448                 if (!eepc_get_entry_by_keycode(old_keycode))
 449                         clear_bit(old_keycode, dev->keybit);
 450                 return 0;
 451         }
 452
 453         return -EINVAL;
 454 }
 455
 456 static int eeepc_hotk_check(void)
 457 {
 458         const struct key_entry *key;
 459         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 460         int result;
 461
 462         result = acpi_bus_get_status(ehotk->device);
 463         if (result)
 464                 return result;
 465         if (ehotk->device->status.present) {
 466                 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
 467                                     &buffer)) {
 468                         printk(EEEPC_ERR "Hotkey initialization failed\n");
 469                         return -ENODEV;
 470                 } else {
 471                         printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
 472                                ehotk->init_flag);
 473                 }
 474                 /* get control methods supported */
 475                 if (read_acpi_int(ehotk->handle, "CMSG"
 476                                    , &ehotk->cm_supported)) {
 477                         printk(EEEPC_ERR
 478                                "Get control methods supported failed\n");
 479                         return -ENODEV;
 480                 } else {
 481                         printk(EEEPC_INFO
 482                                "Get control methods supported: 0x%x\n",
 483                                ehotk->cm_supported);
 484                 }
 485                 ehotk->inputdev = input_allocate_device();
 486                 if (!ehotk->inputdev) {
 487                         printk(EEEPC_INFO "Unable to allocate input device\n");
 488                         return 0;
 489                 }
 490                 ehotk->inputdev->name = "Asus EeePC extra buttons";
 491                 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
 492                 ehotk->inputdev->id.bustype = BUS_HOST;
 493                 ehotk->inputdev->getkeycode = eeepc_getkeycode;
 494                 ehotk->inputdev->setkeycode = eeepc_setkeycode;
 495
 496                 for (key = eeepc_keymap; key->type != KE_END; key++) {
 497                         switch (key->type) {
 498                         case KE_KEY:
 499                                 set_bit(EV_KEY, ehotk->inputdev->evbit);
 500                                 set_bit(key->keycode, ehotk->inputdev->keybit);
 501                                 break;
 502                         }
 503                 }
 504                 result = input_register_device(ehotk->inputdev);
 505                 if (result) {
 506                         printk(EEEPC_INFO "Unable to register input device\n");
 507                         input_free_device(ehotk->inputdev);
 508                         return 0;
 509                 }
 510         } else {
 511                 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
 512                 return -EINVAL;
 513         }
 514         return 0;
 515 }
 516
 517 static int notify_brn(void)
 518 {
 519         /* returns the *previous* brightness, or -1 */
 520         struct backlight_device *bd = eeepc_backlight_device;
 521         if (bd) {
 522                 int old = bd->props.brightness;
 523                 bd->props.brightness = read_brightness(bd);
 524                 return old;
 525         }
 526         return -1;
 527 }
 528
 529 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 530 {
 531         struct pci_dev *dev;
 532         struct pci_bus *bus = pci_find_bus(0, 1);
 533
 534         if (event != ACPI_NOTIFY_BUS_CHECK)
 535                 return;
 536
 537         if (!bus) {
 538                 printk(EEEPC_WARNING "Unable to find PCI bus 1?\n");
 539                 return;
 540         }
 541
 542         if (get_acpi(CM_ASL_WLAN) == 1) {
 543                 dev = pci_get_slot(bus, 0);
 544                 if (dev) {
 545                         /* Device already present */
 546                         pci_dev_put(dev);
 547                         return;
 548                 }
 549                 dev = pci_scan_single_device(bus, 0);
 550                 if (dev) {
 551                         pci_bus_assign_resources(bus);
 552                         if (pci_bus_add_device(dev))
 553                                 printk(EEEPC_ERR "Unable to hotplug wifi\n");
 554                 }
 555         } else {
 556                 dev = pci_get_slot(bus, 0);
 557                 if (dev) {
 558                         pci_remove_bus_device(dev);
 559                         pci_dev_put(dev);
 560                 }
 561         }
 562 }
 563
 564 static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
 565 {
 566         static struct key_entry *key;
 567         u16 count;
 568         int brn = -ENODEV;
 569
 570         if (!ehotk)
 571                 return;
 572         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
 573                 brn = notify_brn();
 574         count = ehotk->event_count[event % 128]++;
 575         acpi_bus_generate_proc_event(ehotk->device, event, count);
 576         acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
 577                                         dev_name(&ehotk->device->dev), event,
 578                                         count);
 579         if (ehotk->inputdev) {
 580                 if (brn != -ENODEV) {
 581                         /* brightness-change events need special
 582                          * handling for conversion to key events
 583                          */
 584                         if (brn < 0)
 585                                 brn = event;
 586                         else
 587                                 brn += NOTIFY_BRN_MIN;
 588                         if (event < brn)
 589                                 event = NOTIFY_BRN_MIN; /* brightness down */
 590                         else if (event > brn)
 591                                 event = NOTIFY_BRN_MIN + 2; /* ... up */
 592                         else
 593                                 event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
 594                 }
 595                 key = eepc_get_entry_by_scancode(event);
 596                 if (key) {
 597                         switch (key->type) {
 598                         case KE_KEY:
 599                                 input_report_key(ehotk->inputdev, key->keycode,
 600                                                  1);
 601                                 input_sync(ehotk->inputdev);
 602                                 input_report_key(ehotk->inputdev, key->keycode,
 603                                                  0);
 604                                 input_sync(ehotk->inputdev);
 605                                 break;
 606                         }
 607                 }
 608         }
 609 }
 610
 611 static int eeepc_register_rfkill_notifier(char *node)
 612 {
 613         acpi_status status = AE_OK;
 614         acpi_handle handle;
 615
 616         status = acpi_get_handle(NULL, node, &handle);
 617
 618         if (ACPI_SUCCESS(status)) {
 619                 status = acpi_install_notify_handler(handle,
 620                                                      ACPI_SYSTEM_NOTIFY,
 621                                                      eeepc_rfkill_notify,
 622                                                      NULL);
 623                 if (ACPI_FAILURE(status))
 624                         printk(EEEPC_WARNING
 625                                "Failed to register notify on %s\n", node);
 626         } else
 627                 return -ENODEV;
 628
 629         return 0;
 630 }
 631
 632 static void eeepc_unregister_rfkill_notifier(char *node)
 633 {
 634         acpi_status status = AE_OK;
 635         acpi_handle handle;
 636
 637         status = acpi_get_handle(NULL, node, &handle);
 638
 639         if (ACPI_SUCCESS(status)) {
 640                 status = acpi_remove_notify_handler(handle,
 641                                                      ACPI_SYSTEM_NOTIFY,
 642                                                      eeepc_rfkill_notify);
 643                 if (ACPI_FAILURE(status))
 644                         printk(EEEPC_ERR
 645                                "Error removing rfkill notify handler %s\n",
 646                                 node);
 647         }
 648 }
 649
 650 static int eeepc_hotk_add(struct acpi_device *device)
 651 {
 652         acpi_status status = AE_OK;
 653         int result;
 654
 655         if (!device)
 656                  return -EINVAL;
 657         printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
 658         ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
 659         if (!ehotk)
 660                 return -ENOMEM;
 661         ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
 662         ehotk->handle = device->handle;
 663         strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
 664         strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
 665         device->driver_data = ehotk;
 666         ehotk->device = device;
 667         result = eeepc_hotk_check();
 668         if (result)
 669                 goto ehotk_fail;
 670         status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 671                                              eeepc_hotk_notify, ehotk);
 672         if (ACPI_FAILURE(status))
 673                 printk(EEEPC_ERR "Error installing notify handler\n");
 674
 675         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
 676         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
 677
 678         if (get_acpi(CM_ASL_WLAN) != -1) {
 679                 ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
 680                                                            RFKILL_TYPE_WLAN);
 681
 682                 if (!ehotk->eeepc_wlan_rfkill)
 683                         goto wlan_fail;
 684
 685                 ehotk->eeepc_wlan_rfkill->name = "eeepc-wlan";
 686                 ehotk->eeepc_wlan_rfkill->toggle_radio = eeepc_wlan_rfkill_set;
 687                 ehotk->eeepc_wlan_rfkill->get_state = eeepc_wlan_rfkill_state;
 688                 if (get_acpi(CM_ASL_WLAN) == 1) {
 689                         ehotk->eeepc_wlan_rfkill->state =
 690                                 RFKILL_STATE_UNBLOCKED;
 691                         rfkill_set_default(RFKILL_TYPE_WLAN,
 692                                            RFKILL_STATE_UNBLOCKED);
 693                 } else {
 694                         ehotk->eeepc_wlan_rfkill->state =
 695                                 RFKILL_STATE_SOFT_BLOCKED;
 696                         rfkill_set_default(RFKILL_TYPE_WLAN,
 697                                            RFKILL_STATE_SOFT_BLOCKED);
 698                 }
 699                 result = rfkill_register(ehotk->eeepc_wlan_rfkill);
 700                 if (result)
 701                         goto wlan_fail;
 702         }
 703
 704         if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
 705                 ehotk->eeepc_bluetooth_rfkill =
 706                         rfkill_allocate(&device->dev, RFKILL_TYPE_BLUETOOTH);
 707
 708                 if (!ehotk->eeepc_bluetooth_rfkill)
 709                         goto bluetooth_fail;
 710
 711                 ehotk->eeepc_bluetooth_rfkill->name = "eeepc-bluetooth";
 712                 ehotk->eeepc_bluetooth_rfkill->toggle_radio =
 713                         eeepc_bluetooth_rfkill_set;
 714                 ehotk->eeepc_bluetooth_rfkill->get_state =
 715                         eeepc_bluetooth_rfkill_state;
 716                 if (get_acpi(CM_ASL_BLUETOOTH) == 1) {
 717                         ehotk->eeepc_bluetooth_rfkill->state =
 718                                 RFKILL_STATE_UNBLOCKED;
 719                         rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
 720                                            RFKILL_STATE_UNBLOCKED);
 721                 } else {
 722                         ehotk->eeepc_bluetooth_rfkill->state =
 723                                 RFKILL_STATE_SOFT_BLOCKED;
 724                         rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
 725                                            RFKILL_STATE_SOFT_BLOCKED);
 726                 }
 727
 728                 result = rfkill_register(ehotk->eeepc_bluetooth_rfkill);
 729                 if (result)
 730                         goto bluetooth_fail;
 731         }
 732
 733         return 0;
 734
 735  bluetooth_fail:
 736         if (ehotk->eeepc_bluetooth_rfkill)
 737                 rfkill_free(ehotk->eeepc_bluetooth_rfkill);
 738         rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 739         ehotk->eeepc_wlan_rfkill = NULL;
 740  wlan_fail:
 741         if (ehotk->eeepc_wlan_rfkill)
 742                 rfkill_free(ehotk->eeepc_wlan_rfkill);
 743  ehotk_fail:
 744         kfree(ehotk);
 745         ehotk = NULL;
 746
 747         return result;
 748 }
 749
 750 static int eeepc_hotk_remove(struct acpi_device *device, int type)
 751 {
 752         acpi_status status = 0;
 753
 754         if (!device || !acpi_driver_data(device))
 755                  return -EINVAL;
 756         status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 757                                             eeepc_hotk_notify);
 758         if (ACPI_FAILURE(status))
 759                 printk(EEEPC_ERR "Error removing notify handler\n");
 760
 761         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 762         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 763
 764         kfree(ehotk);
 765         return 0;
 766 }
 767
 768 /*
 769  * Hwmon
 770  */
 771 static int eeepc_get_fan_pwm(void)
 772 {
 773         int value = 0;
 774
 775         read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
 776         value = value * 255 / 100;
 777         return (value);
 778 }
 779
 780 static void eeepc_set_fan_pwm(int value)
 781 {
 782         value = SENSORS_LIMIT(value, 0, 255);
 783         value = value * 100 / 255;
 784         ec_write(EEEPC_EC_SC02, value);
 785 }
 786
 787 static int eeepc_get_fan_rpm(void)
 788 {
 789         int high = 0;
 790         int low = 0;
 791
 792         read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
 793         read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
 794         return (high << 8 | low);
 795 }
 796
 797 static int eeepc_get_fan_ctrl(void)
 798 {
 799         int value = 0;
 800
 801         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 802         return ((value & 0x02 ? 1 : 0));
 803 }
 804
 805 static void eeepc_set_fan_ctrl(int manual)
 806 {
 807         int value = 0;
 808
 809         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 810         if (manual)
 811                 value |= 0x02;
 812         else
 813                 value &= ~0x02;
 814         ec_write(EEEPC_EC_SFB3, value);
 815 }
 816
 817 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 818 {
 819         int rv, value;
 820
 821         rv = parse_arg(buf, count, &value);
 822         if (rv > 0)
 823                 set(value);
 824         return rv;
 825 }
 826
 827 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 828 {
 829         return sprintf(buf, "%d\n", get());
 830 }
 831
 832 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
 833         static ssize_t show_##_name(struct device *dev,                 \
 834                                     struct device_attribute *attr,      \
 835                                     char *buf)                          \
 836         {                                                               \
 837                 return show_sys_hwmon(_set, buf);                       \
 838         }                                                               \
 839         static ssize_t store_##_name(struct device *dev,                \
 840                                      struct device_attribute *attr,     \
 841                                      const char *buf, size_t count)     \
 842         {                                                               \
 843                 return store_sys_hwmon(_get, buf, count);               \
 844         }                                                               \
 845         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
 846
 847 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
 848 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
 849                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
 850 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 851                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
 852
 853 static ssize_t
 854 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 855 {
 856         return sprintf(buf, "eeepc\n");
 857 }
 858 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 859
 860 static struct attribute *hwmon_attributes[] = {
 861         &sensor_dev_attr_pwm1.dev_attr.attr,
 862         &sensor_dev_attr_fan1_input.dev_attr.attr,
 863         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 864         &sensor_dev_attr_name.dev_attr.attr,
 865         NULL
 866 };
 867
 868 static struct attribute_group hwmon_attribute_group = {
 869         .attrs = hwmon_attributes
 870 };
 871
 872 /*
 873  * exit/init
 874  */
 875 static void eeepc_backlight_exit(void)
 876 {
 877         if (eeepc_backlight_device)
 878                 backlight_device_unregister(eeepc_backlight_device);
 879         eeepc_backlight_device = NULL;
 880 }
 881
 882 static void eeepc_rfkill_exit(void)
 883 {
 884         if (ehotk->eeepc_wlan_rfkill)
 885                 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 886         if (ehotk->eeepc_bluetooth_rfkill)
 887                 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
 888 }
 889
 890 static void eeepc_input_exit(void)
 891 {
 892         if (ehotk->inputdev)
 893                 input_unregister_device(ehotk->inputdev);
 894 }
 895
 896 static void eeepc_hwmon_exit(void)
 897 {
 898         struct device *hwmon;
 899
 900         hwmon = eeepc_hwmon_device;
 901         if (!hwmon)
 902                 return ;
 903         sysfs_remove_group(&hwmon->kobj,
 904                            &hwmon_attribute_group);
 905         hwmon_device_unregister(hwmon);
 906         eeepc_hwmon_device = NULL;
 907 }
 908
 909 static void __exit eeepc_laptop_exit(void)
 910 {
 911         eeepc_backlight_exit();
 912         eeepc_rfkill_exit();
 913         eeepc_input_exit();
 914         eeepc_hwmon_exit();
 915         acpi_bus_unregister_driver(&eeepc_hotk_driver);
 916         sysfs_remove_group(&platform_device->dev.kobj,
 917                            &platform_attribute_group);
 918         platform_device_unregister(platform_device);
 919         platform_driver_unregister(&platform_driver);
 920 }
 921
 922 static int eeepc_backlight_init(struct device *dev)
 923 {
 924         struct backlight_device *bd;
 925
 926         bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
 927                                        NULL, &eeepcbl_ops);
 928         if (IS_ERR(bd)) {
 929                 printk(EEEPC_ERR
 930                        "Could not register eeepc backlight device\n");
 931                 eeepc_backlight_device = NULL;
 932                 return PTR_ERR(bd);
 933         }
 934         eeepc_backlight_device = bd;
 935         bd->props.max_brightness = 15;
 936         bd->props.brightness = read_brightness(NULL);
 937         bd->props.power = FB_BLANK_UNBLANK;
 938         backlight_update_status(bd);
 939         return 0;
 940 }
 941
 942 static int eeepc_hwmon_init(struct device *dev)
 943 {
 944         struct device *hwmon;
 945         int result;
 946
 947         hwmon = hwmon_device_register(dev);
 948         if (IS_ERR(hwmon)) {
 949                 printk(EEEPC_ERR
 950                        "Could not register eeepc hwmon device\n");
 951                 eeepc_hwmon_device = NULL;
 952                 return PTR_ERR(hwmon);
 953         }
 954         eeepc_hwmon_device = hwmon;
 955         result = sysfs_create_group(&hwmon->kobj,
 956                                     &hwmon_attribute_group);
 957         if (result)
 958                 eeepc_hwmon_exit();
 959         return result;
 960 }
 961
 962 static int __init eeepc_laptop_init(void)
 963 {
 964         struct device *dev;
 965         int result;
 966
 967         if (acpi_disabled)
 968                 return -ENODEV;
 969         result = acpi_bus_register_driver(&eeepc_hotk_driver);
 970         if (result < 0)
 971                 return result;
 972         if (!ehotk) {
 973                 acpi_bus_unregister_driver(&eeepc_hotk_driver);
 974                 return -ENODEV;
 975         }
 976         dev = acpi_get_physical_device(ehotk->device->handle);
 977
 978         if (!acpi_video_backlight_support()) {
 979                 result = eeepc_backlight_init(dev);
 980                 if (result)
 981                         goto fail_backlight;
 982         } else
 983                 printk(EEEPC_INFO "Backlight controlled by ACPI video "
 984                        "driver\n");
 985
 986         result = eeepc_hwmon_init(dev);
 987         if (result)
 988                 goto fail_hwmon;
 989         /* Register platform stuff */
 990         result = platform_driver_register(&platform_driver);
 991         if (result)
 992                 goto fail_platform_driver;
 993         platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
 994         if (!platform_device) {
 995                 result = -ENOMEM;
 996                 goto fail_platform_device1;
 997         }
 998         result = platform_device_add(platform_device);
 999         if (result)
1000                 goto fail_platform_device2;
1001         result = sysfs_create_group(&platform_device->dev.kobj,
1002                                     &platform_attribute_group);
1003         if (result)
1004                 goto fail_sysfs;
1005         return 0;
1006 fail_sysfs:
1007         platform_device_del(platform_device);
1008 fail_platform_device2:
1009         platform_device_put(platform_device);
1010 fail_platform_device1:
1011         platform_driver_unregister(&platform_driver);
1012 fail_platform_driver:
1013         eeepc_hwmon_exit();
1014 fail_hwmon:
1015         eeepc_backlight_exit();
1016 fail_backlight:
1017         eeepc_input_exit();
1018         eeepc_rfkill_exit();
1019         return result;
1020 }
1021
1022 module_init(eeepc_laptop_init);
1023 module_exit(eeepc_laptop_exit);