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, 0x11, KEY_WLAN },
 162         {KE_KEY, 0x12, KEY_PROG1 },
 163         {KE_KEY, 0x13, KEY_MUTE },
 164         {KE_KEY, 0x14, KEY_VOLUMEDOWN },
 165         {KE_KEY, 0x15, KEY_VOLUMEUP },
 166         {KE_KEY, 0x1a, KEY_COFFEE },
 167         {KE_KEY, 0x1b, KEY_ZOOM },
 168         {KE_KEY, 0x1c, KEY_PROG2 },
 169         {KE_KEY, 0x1d, KEY_PROG3 },
 170         {KE_KEY, NOTIFY_BRN_MIN,     KEY_BRIGHTNESSDOWN },
 171         {KE_KEY, NOTIFY_BRN_MIN + 2, KEY_BRIGHTNESSUP },
 172         {KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
 173         {KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
 174         {KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
 175         {KE_END, 0},
 176 };
 177
 178 /*
 179  * The hotkey driver declaration
 180  */
 181 static int eeepc_hotk_add(struct acpi_device *device);
 182 static int eeepc_hotk_remove(struct acpi_device *device, int type);
 183 static int eeepc_hotk_resume(struct acpi_device *device);
 184 static void eeepc_hotk_notify(struct acpi_device *device, u32 event);
 185
 186 static const struct acpi_device_id eeepc_device_ids[] = {
 187         {EEEPC_HOTK_HID, 0},
 188         {"", 0},
 189 };
 190 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
 191
 192 static struct acpi_driver eeepc_hotk_driver = {
 193         .name = EEEPC_HOTK_NAME,
 194         .class = EEEPC_HOTK_CLASS,
 195         .ids = eeepc_device_ids,
 196         .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
 197         .ops = {
 198                 .add = eeepc_hotk_add,
 199                 .remove = eeepc_hotk_remove,
 200                 .resume = eeepc_hotk_resume,
 201                 .notify = eeepc_hotk_notify,
 202         },
 203 };
 204
 205 /* The backlight device /sys/class/backlight */
 206 static struct backlight_device *eeepc_backlight_device;
 207
 208 /* The hwmon device */
 209 static struct device *eeepc_hwmon_device;
 210
 211 /*
 212  * The backlight class declaration
 213  */
 214 static int read_brightness(struct backlight_device *bd);
 215 static int update_bl_status(struct backlight_device *bd);
 216 static struct backlight_ops eeepcbl_ops = {
 217         .get_brightness = read_brightness,
 218         .update_status = update_bl_status,
 219 };
 220
 221 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
 222 MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
 223 MODULE_LICENSE("GPL");
 224
 225 /*
 226  * ACPI Helpers
 227  */
 228 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 229                           struct acpi_buffer *output)
 230 {
 231         struct acpi_object_list params;
 232         union acpi_object in_obj;
 233         acpi_status status;
 234
 235         params.count = 1;
 236         params.pointer = &in_obj;
 237         in_obj.type = ACPI_TYPE_INTEGER;
 238         in_obj.integer.value = val;
 239
 240         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 241         return (status == AE_OK ? 0 : -1);
 242 }
 243
 244 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 245 {
 246         acpi_status status;
 247         unsigned long long result;
 248
 249         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 250         if (ACPI_FAILURE(status)) {
 251                 *val = -1;
 252                 return -1;
 253         } else {
 254                 *val = result;
 255                 return 0;
 256         }
 257 }
 258
 259 static int set_acpi(int cm, int value)
 260 {
 261         if (ehotk->cm_supported & (0x1 << cm)) {
 262                 const char *method = cm_setv[cm];
 263                 if (method == NULL)
 264                         return -ENODEV;
 265                 if (write_acpi_int(ehotk->handle, method, value, NULL))
 266                         printk(EEEPC_WARNING "Error writing %s\n", method);
 267         }
 268         return 0;
 269 }
 270
 271 static int get_acpi(int cm)
 272 {
 273         int value = -1;
 274         if ((ehotk->cm_supported & (0x1 << cm))) {
 275                 const char *method = cm_getv[cm];
 276                 if (method == NULL)
 277                         return -ENODEV;
 278                 if (read_acpi_int(ehotk->handle, method, &value))
 279                         printk(EEEPC_WARNING "Error reading %s\n", method);
 280         }
 281         return value;
 282 }
 283
 284 /*
 285  * Backlight
 286  */
 287 static int read_brightness(struct backlight_device *bd)
 288 {
 289         return get_acpi(CM_ASL_PANELBRIGHT);
 290 }
 291
 292 static int set_brightness(struct backlight_device *bd, int value)
 293 {
 294         value = max(0, min(15, value));
 295         return set_acpi(CM_ASL_PANELBRIGHT, value);
 296 }
 297
 298 static int update_bl_status(struct backlight_device *bd)
 299 {
 300         return set_brightness(bd, bd->props.brightness);
 301 }
 302
 303 /*
 304  * Rfkill helpers
 305  */
 306
 307 static bool eeepc_wlan_rfkill_blocked(void)
 308 {
 309         if (get_acpi(CM_ASL_WLAN) == 1)
 310                 return false;
 311         return true;
 312 }
 313
 314 static int eeepc_rfkill_set(void *data, bool blocked)
 315 {
 316         unsigned long asl = (unsigned long)data;
 317         return set_acpi(asl, !blocked);
 318 }
 319
 320 static const struct rfkill_ops eeepc_rfkill_ops = {
 321         .set_block = eeepc_rfkill_set,
 322 };
 323
 324 /*
 325  * Sys helpers
 326  */
 327 static int parse_arg(const char *buf, unsigned long count, int *val)
 328 {
 329         if (!count)
 330                 return 0;
 331         if (sscanf(buf, "%i", val) != 1)
 332                 return -EINVAL;
 333         return count;
 334 }
 335
 336 static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
 337 {
 338         int rv, value;
 339
 340         rv = parse_arg(buf, count, &value);
 341         if (rv > 0)
 342                 set_acpi(cm, value);
 343         return rv;
 344 }
 345
 346 static ssize_t show_sys_acpi(int cm, char *buf)
 347 {
 348         return sprintf(buf, "%d\n", get_acpi(cm));
 349 }
 350
 351 #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm)                            \
 352         static ssize_t show_##_name(struct device *dev,                 \
 353                                     struct device_attribute *attr,      \
 354                                     char *buf)                          \
 355         {                                                               \
 356                 return show_sys_acpi(_cm, buf);                         \
 357         }                                                               \
 358         static ssize_t store_##_name(struct device *dev,                \
 359                                      struct device_attribute *attr,     \
 360                                      const char *buf, size_t count)     \
 361         {                                                               \
 362                 return store_sys_acpi(_cm, buf, count);                 \
 363         }                                                               \
 364         static struct device_attribute dev_attr_##_name = {             \
 365                 .attr = {                                               \
 366                         .name = __stringify(_name),                     \
 367                         .mode = 0644 },                                 \
 368                 .show   = show_##_name,                                 \
 369                 .store  = store_##_name,                                \
 370         }
 371
 372 EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
 373 EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
 374 EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
 375 EEEPC_CREATE_DEVICE_ATTR(cpufv, CM_ASL_CPUFV);
 376
 377 static struct attribute *platform_attributes[] = {
 378         &dev_attr_camera.attr,
 379         &dev_attr_cardr.attr,
 380         &dev_attr_disp.attr,
 381         &dev_attr_cpufv.attr,
 382         NULL
 383 };
 384
 385 static struct attribute_group platform_attribute_group = {
 386         .attrs = platform_attributes
 387 };
 388
 389 /*
 390  * Hotkey functions
 391  */
 392 static struct key_entry *eepc_get_entry_by_scancode(int code)
 393 {
 394         struct key_entry *key;
 395
 396         for (key = eeepc_keymap; key->type != KE_END; key++)
 397                 if (code == key->code)
 398                         return key;
 399
 400         return NULL;
 401 }
 402
 403 static struct key_entry *eepc_get_entry_by_keycode(int code)
 404 {
 405         struct key_entry *key;
 406
 407         for (key = eeepc_keymap; key->type != KE_END; key++)
 408                 if (code == key->keycode && key->type == KE_KEY)
 409                         return key;
 410
 411         return NULL;
 412 }
 413
 414 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
 415 {
 416         struct key_entry *key = eepc_get_entry_by_scancode(scancode);
 417
 418         if (key && key->type == KE_KEY) {
 419                 *keycode = key->keycode;
 420                 return 0;
 421         }
 422
 423         return -EINVAL;
 424 }
 425
 426 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 427 {
 428         struct key_entry *key;
 429         int old_keycode;
 430
 431         if (keycode < 0 || keycode > KEY_MAX)
 432                 return -EINVAL;
 433
 434         key = eepc_get_entry_by_scancode(scancode);
 435         if (key && key->type == KE_KEY) {
 436                 old_keycode = key->keycode;
 437                 key->keycode = keycode;
 438                 set_bit(keycode, dev->keybit);
 439                 if (!eepc_get_entry_by_keycode(old_keycode))
 440                         clear_bit(old_keycode, dev->keybit);
 441                 return 0;
 442         }
 443
 444         return -EINVAL;
 445 }
 446
 447 static int eeepc_hotk_check(void)
 448 {
 449         const struct key_entry *key;
 450         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 451         int result;
 452
 453         result = acpi_bus_get_status(ehotk->device);
 454         if (result)
 455                 return result;
 456         if (ehotk->device->status.present) {
 457                 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
 458                                     &buffer)) {
 459                         printk(EEEPC_ERR "Hotkey initialization failed\n");
 460                         return -ENODEV;
 461                 } else {
 462                         printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
 463                                ehotk->init_flag);
 464                 }
 465                 /* get control methods supported */
 466                 if (read_acpi_int(ehotk->handle, "CMSG"
 467                                    , &ehotk->cm_supported)) {
 468                         printk(EEEPC_ERR
 469                                "Get control methods supported failed\n");
 470                         return -ENODEV;
 471                 } else {
 472                         printk(EEEPC_INFO
 473                                "Get control methods supported: 0x%x\n",
 474                                ehotk->cm_supported);
 475                 }
 476                 ehotk->inputdev = input_allocate_device();
 477                 if (!ehotk->inputdev) {
 478                         printk(EEEPC_INFO "Unable to allocate input device\n");
 479                         return 0;
 480                 }
 481                 ehotk->inputdev->name = "Asus EeePC extra buttons";
 482                 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
 483                 ehotk->inputdev->id.bustype = BUS_HOST;
 484                 ehotk->inputdev->getkeycode = eeepc_getkeycode;
 485                 ehotk->inputdev->setkeycode = eeepc_setkeycode;
 486
 487                 for (key = eeepc_keymap; key->type != KE_END; key++) {
 488                         switch (key->type) {
 489                         case KE_KEY:
 490                                 set_bit(EV_KEY, ehotk->inputdev->evbit);
 491                                 set_bit(key->keycode, ehotk->inputdev->keybit);
 492                                 break;
 493                         }
 494                 }
 495                 result = input_register_device(ehotk->inputdev);
 496                 if (result) {
 497                         printk(EEEPC_INFO "Unable to register input device\n");
 498                         input_free_device(ehotk->inputdev);
 499                         return 0;
 500                 }
 501         } else {
 502                 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
 503                 return -EINVAL;
 504         }
 505         return 0;
 506 }
 507
 508 static int notify_brn(void)
 509 {
 510         /* returns the *previous* brightness, or -1 */
 511         struct backlight_device *bd = eeepc_backlight_device;
 512         if (bd) {
 513                 int old = bd->props.brightness;
 514                 bd->props.brightness = read_brightness(bd);
 515                 return old;
 516         }
 517         return -1;
 518 }
 519
 520 static void eeepc_rfkill_hotplug(void)
 521 {
 522         struct pci_dev *dev;
 523         struct pci_bus *bus = pci_find_bus(0, 1);
 524         bool blocked;
 525
 526         if (!bus) {
 527                 printk(EEEPC_WARNING "Unable to find PCI bus 1?\n");
 528                 return;
 529         }
 530
 531         blocked = eeepc_wlan_rfkill_blocked();
 532         if (!blocked) {
 533                 dev = pci_get_slot(bus, 0);
 534                 if (dev) {
 535                         /* Device already present */
 536                         pci_dev_put(dev);
 537                         return;
 538                 }
 539                 dev = pci_scan_single_device(bus, 0);
 540                 if (dev) {
 541                         pci_bus_assign_resources(bus);
 542                         if (pci_bus_add_device(dev))
 543                                 printk(EEEPC_ERR "Unable to hotplug wifi\n");
 544                 }
 545         } else {
 546                 dev = pci_get_slot(bus, 0);
 547                 if (dev) {
 548                         pci_remove_bus_device(dev);
 549                         pci_dev_put(dev);
 550                 }
 551         }
 552
 553         rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill, blocked);
 554 }
 555
 556 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 557 {
 558         if (event != ACPI_NOTIFY_BUS_CHECK)
 559                 return;
 560
 561         eeepc_rfkill_hotplug();
 562 }
 563
 564 static void eeepc_hotk_notify(struct acpi_device *device, u32 event)
 565 {
 566         static struct key_entry *key;
 567         u16 count;
 568         int brn = -ENODEV;
 569
 570         if (!ehotk)
 571                 return;
 572         if (event > ACPI_MAX_SYS_NOTIFY)
 573                 return;
 574         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
 575                 brn = notify_brn();
 576         count = ehotk->event_count[event % 128]++;
 577         acpi_bus_generate_proc_event(ehotk->device, event, count);
 578         acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
 579                                         dev_name(&ehotk->device->dev), event,
 580                                         count);
 581         if (ehotk->inputdev) {
 582                 if (brn != -ENODEV) {
 583                         /* brightness-change events need special
 584                          * handling for conversion to key events
 585                          */
 586                         if (brn < 0)
 587                                 brn = event;
 588                         else
 589                                 brn += NOTIFY_BRN_MIN;
 590                         if (event < brn)
 591                                 event = NOTIFY_BRN_MIN; /* brightness down */
 592                         else if (event > brn)
 593                                 event = NOTIFY_BRN_MIN + 2; /* ... up */
 594                         else
 595                                 event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
 596                 }
 597                 key = eepc_get_entry_by_scancode(event);
 598                 if (key) {
 599                         switch (key->type) {
 600                         case KE_KEY:
 601                                 input_report_key(ehotk->inputdev, key->keycode,
 602                                                  1);
 603                                 input_sync(ehotk->inputdev);
 604                                 input_report_key(ehotk->inputdev, key->keycode,
 605                                                  0);
 606                                 input_sync(ehotk->inputdev);
 607                                 break;
 608                         }
 609                 }
 610         }
 611 }
 612
 613 static int eeepc_register_rfkill_notifier(char *node)
 614 {
 615         acpi_status status = AE_OK;
 616         acpi_handle handle;
 617
 618         status = acpi_get_handle(NULL, node, &handle);
 619
 620         if (ACPI_SUCCESS(status)) {
 621                 status = acpi_install_notify_handler(handle,
 622                                                      ACPI_SYSTEM_NOTIFY,
 623                                                      eeepc_rfkill_notify,
 624                                                      NULL);
 625                 if (ACPI_FAILURE(status))
 626                         printk(EEEPC_WARNING
 627                                "Failed to register notify on %s\n", node);
 628         } else
 629                 return -ENODEV;
 630
 631         return 0;
 632 }
 633
 634 static void eeepc_unregister_rfkill_notifier(char *node)
 635 {
 636         acpi_status status = AE_OK;
 637         acpi_handle handle;
 638
 639         status = acpi_get_handle(NULL, node, &handle);
 640
 641         if (ACPI_SUCCESS(status)) {
 642                 status = acpi_remove_notify_handler(handle,
 643                                                      ACPI_SYSTEM_NOTIFY,
 644                                                      eeepc_rfkill_notify);
 645                 if (ACPI_FAILURE(status))
 646                         printk(EEEPC_ERR
 647                                "Error removing rfkill notify handler %s\n",
 648                                 node);
 649         }
 650 }
 651
 652 static int eeepc_hotk_add(struct acpi_device *device)
 653 {
 654         int result;
 655
 656         if (!device)
 657                  return -EINVAL;
 658         printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
 659         ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
 660         if (!ehotk)
 661                 return -ENOMEM;
 662         ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
 663         ehotk->handle = device->handle;
 664         strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
 665         strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
 666         device->driver_data = ehotk;
 667         ehotk->device = device;
 668         result = eeepc_hotk_check();
 669         if (result)
 670                 goto ehotk_fail;
 671
 672         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
 673         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
 674
 675         if (get_acpi(CM_ASL_WLAN) != -1) {
 676                 ehotk->eeepc_wlan_rfkill = rfkill_alloc("eeepc-wlan",
 677                                                         &device->dev,
 678                                                         RFKILL_TYPE_WLAN,
 679                                                         &eeepc_rfkill_ops,
 680                                                         (void *)CM_ASL_WLAN);
 681
 682                 if (!ehotk->eeepc_wlan_rfkill)
 683                         goto wlan_fail;
 684
 685                 rfkill_init_sw_state(ehotk->eeepc_wlan_rfkill,
 686                                      get_acpi(CM_ASL_WLAN) != 1);
 687                 result = rfkill_register(ehotk->eeepc_wlan_rfkill);
 688                 if (result)
 689                         goto wlan_fail;
 690         }
 691
 692         if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
 693                 ehotk->eeepc_bluetooth_rfkill =
 694                         rfkill_alloc("eeepc-bluetooth",
 695                                      &device->dev,
 696                                      RFKILL_TYPE_BLUETOOTH,
 697                                      &eeepc_rfkill_ops,
 698                                      (void *)CM_ASL_BLUETOOTH);
 699
 700                 if (!ehotk->eeepc_bluetooth_rfkill)
 701                         goto bluetooth_fail;
 702
 703                 rfkill_init_sw_state(ehotk->eeepc_bluetooth_rfkill,
 704                                      get_acpi(CM_ASL_BLUETOOTH) != 1);
 705                 result = rfkill_register(ehotk->eeepc_bluetooth_rfkill);
 706                 if (result)
 707                         goto bluetooth_fail;
 708         }
 709
 710         return 0;
 711
 712  bluetooth_fail:
 713         rfkill_destroy(ehotk->eeepc_bluetooth_rfkill);
 714         rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 715  wlan_fail:
 716         rfkill_destroy(ehotk->eeepc_wlan_rfkill);
 717         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 718         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 719  ehotk_fail:
 720         kfree(ehotk);
 721         ehotk = NULL;
 722
 723         return result;
 724 }
 725
 726 static int eeepc_hotk_remove(struct acpi_device *device, int type)
 727 {
 728         if (!device || !acpi_driver_data(device))
 729                  return -EINVAL;
 730
 731         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 732         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 733
 734         kfree(ehotk);
 735         return 0;
 736 }
 737
 738 static int eeepc_hotk_resume(struct acpi_device *device)
 739 {
 740         if (ehotk->eeepc_wlan_rfkill) {
 741                 bool wlan;
 742
 743                 /* Workaround - it seems that _PTS disables the wireless
 744                    without notification or changing the value read by WLAN.
 745                    Normally this is fine because the correct value is restored
 746                    from the non-volatile storage on resume, but we need to do
 747                    it ourself if case suspend is aborted, or we lose wireless.
 748                  */
 749                 wlan = get_acpi(CM_ASL_WLAN);
 750                 set_acpi(CM_ASL_WLAN, wlan);
 751
 752                 rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill,
 753                                     wlan != 1);
 754
 755                 eeepc_rfkill_hotplug();
 756         }
 757
 758         if (ehotk->eeepc_bluetooth_rfkill)
 759                 rfkill_set_sw_state(ehotk->eeepc_bluetooth_rfkill,
 760                                     get_acpi(CM_ASL_BLUETOOTH) != 1);
 761
 762         return 0;
 763 }
 764
 765 /*
 766  * Hwmon
 767  */
 768 static int eeepc_get_fan_pwm(void)
 769 {
 770         int value = 0;
 771
 772         read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
 773         value = value * 255 / 100;
 774         return (value);
 775 }
 776
 777 static void eeepc_set_fan_pwm(int value)
 778 {
 779         value = SENSORS_LIMIT(value, 0, 255);
 780         value = value * 100 / 255;
 781         ec_write(EEEPC_EC_SC02, value);
 782 }
 783
 784 static int eeepc_get_fan_rpm(void)
 785 {
 786         int high = 0;
 787         int low = 0;
 788
 789         read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
 790         read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
 791         return (high << 8 | low);
 792 }
 793
 794 static int eeepc_get_fan_ctrl(void)
 795 {
 796         int value = 0;
 797
 798         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 799         return ((value & 0x02 ? 1 : 0));
 800 }
 801
 802 static void eeepc_set_fan_ctrl(int manual)
 803 {
 804         int value = 0;
 805
 806         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 807         if (manual)
 808                 value |= 0x02;
 809         else
 810                 value &= ~0x02;
 811         ec_write(EEEPC_EC_SFB3, value);
 812 }
 813
 814 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 815 {
 816         int rv, value;
 817
 818         rv = parse_arg(buf, count, &value);
 819         if (rv > 0)
 820                 set(value);
 821         return rv;
 822 }
 823
 824 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 825 {
 826         return sprintf(buf, "%d\n", get());
 827 }
 828
 829 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
 830         static ssize_t show_##_name(struct device *dev,                 \
 831                                     struct device_attribute *attr,      \
 832                                     char *buf)                          \
 833         {                                                               \
 834                 return show_sys_hwmon(_set, buf);                       \
 835         }                                                               \
 836         static ssize_t store_##_name(struct device *dev,                \
 837                                      struct device_attribute *attr,     \
 838                                      const char *buf, size_t count)     \
 839         {                                                               \
 840                 return store_sys_hwmon(_get, buf, count);               \
 841         }                                                               \
 842         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
 843
 844 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
 845 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
 846                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
 847 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 848                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
 849
 850 static ssize_t
 851 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 852 {
 853         return sprintf(buf, "eeepc\n");
 854 }
 855 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 856
 857 static struct attribute *hwmon_attributes[] = {
 858         &sensor_dev_attr_pwm1.dev_attr.attr,
 859         &sensor_dev_attr_fan1_input.dev_attr.attr,
 860         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 861         &sensor_dev_attr_name.dev_attr.attr,
 862         NULL
 863 };
 864
 865 static struct attribute_group hwmon_attribute_group = {
 866         .attrs = hwmon_attributes
 867 };
 868
 869 /*
 870  * exit/init
 871  */
 872 static void eeepc_backlight_exit(void)
 873 {
 874         if (eeepc_backlight_device)
 875                 backlight_device_unregister(eeepc_backlight_device);
 876         eeepc_backlight_device = NULL;
 877 }
 878
 879 static void eeepc_rfkill_exit(void)
 880 {
 881         if (ehotk->eeepc_wlan_rfkill)
 882                 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 883         if (ehotk->eeepc_bluetooth_rfkill)
 884                 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
 885 }
 886
 887 static void eeepc_input_exit(void)
 888 {
 889         if (ehotk->inputdev)
 890                 input_unregister_device(ehotk->inputdev);
 891 }
 892
 893 static void eeepc_hwmon_exit(void)
 894 {
 895         struct device *hwmon;
 896
 897         hwmon = eeepc_hwmon_device;
 898         if (!hwmon)
 899                 return ;
 900         sysfs_remove_group(&hwmon->kobj,
 901                            &hwmon_attribute_group);
 902         hwmon_device_unregister(hwmon);
 903         eeepc_hwmon_device = NULL;
 904 }
 905
 906 static void __exit eeepc_laptop_exit(void)
 907 {
 908         eeepc_backlight_exit();
 909         eeepc_rfkill_exit();
 910         eeepc_input_exit();
 911         eeepc_hwmon_exit();
 912         acpi_bus_unregister_driver(&eeepc_hotk_driver);
 913         sysfs_remove_group(&platform_device->dev.kobj,
 914                            &platform_attribute_group);
 915         platform_device_unregister(platform_device);
 916         platform_driver_unregister(&platform_driver);
 917 }
 918
 919 static int eeepc_backlight_init(struct device *dev)
 920 {
 921         struct backlight_device *bd;
 922
 923         bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
 924                                        NULL, &eeepcbl_ops);
 925         if (IS_ERR(bd)) {
 926                 printk(EEEPC_ERR
 927                        "Could not register eeepc backlight device\n");
 928                 eeepc_backlight_device = NULL;
 929                 return PTR_ERR(bd);
 930         }
 931         eeepc_backlight_device = bd;
 932         bd->props.max_brightness = 15;
 933         bd->props.brightness = read_brightness(NULL);
 934         bd->props.power = FB_BLANK_UNBLANK;
 935         backlight_update_status(bd);
 936         return 0;
 937 }
 938
 939 static int eeepc_hwmon_init(struct device *dev)
 940 {
 941         struct device *hwmon;
 942         int result;
 943
 944         hwmon = hwmon_device_register(dev);
 945         if (IS_ERR(hwmon)) {
 946                 printk(EEEPC_ERR
 947                        "Could not register eeepc hwmon device\n");
 948                 eeepc_hwmon_device = NULL;
 949                 return PTR_ERR(hwmon);
 950         }
 951         eeepc_hwmon_device = hwmon;
 952         result = sysfs_create_group(&hwmon->kobj,
 953                                     &hwmon_attribute_group);
 954         if (result)
 955                 eeepc_hwmon_exit();
 956         return result;
 957 }
 958
 959 static int __init eeepc_laptop_init(void)
 960 {
 961         struct device *dev;
 962         int result;
 963
 964         if (acpi_disabled)
 965                 return -ENODEV;
 966         result = acpi_bus_register_driver(&eeepc_hotk_driver);
 967         if (result < 0)
 968                 return result;
 969         if (!ehotk) {
 970                 acpi_bus_unregister_driver(&eeepc_hotk_driver);
 971                 return -ENODEV;
 972         }
 973         dev = acpi_get_physical_device(ehotk->device->handle);
 974
 975         if (!acpi_video_backlight_support()) {
 976                 result = eeepc_backlight_init(dev);
 977                 if (result)
 978                         goto fail_backlight;
 979         } else
 980                 printk(EEEPC_INFO "Backlight controlled by ACPI video "
 981                        "driver\n");
 982
 983         result = eeepc_hwmon_init(dev);
 984         if (result)
 985                 goto fail_hwmon;
 986         /* Register platform stuff */
 987         result = platform_driver_register(&platform_driver);
 988         if (result)
 989                 goto fail_platform_driver;
 990         platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
 991         if (!platform_device) {
 992                 result = -ENOMEM;
 993                 goto fail_platform_device1;
 994         }
 995         result = platform_device_add(platform_device);
 996         if (result)
 997                 goto fail_platform_device2;
 998         result = sysfs_create_group(&platform_device->dev.kobj,
 999                                     &platform_attribute_group);
1000         if (result)
1001                 goto fail_sysfs;
1002         return 0;
1003 fail_sysfs:
1004         platform_device_del(platform_device);
1005 fail_platform_device2:
1006         platform_device_put(platform_device);
1007 fail_platform_device1:
1008         platform_driver_unregister(&platform_driver);
1009 fail_platform_driver:
1010         eeepc_hwmon_exit();
1011 fail_hwmon:
1012         eeepc_backlight_exit();
1013 fail_backlight:
1014         eeepc_input_exit();
1015         eeepc_rfkill_exit();
1016         return result;
1017 }
1018
1019 module_init(eeepc_laptop_init);
1020 module_exit(eeepc_laptop_exit);