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
 185 static const struct acpi_device_id eeepc_device_ids[] = {
 186         {EEEPC_HOTK_HID, 0},
 187         {"", 0},
 188 };
 189 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
 190
 191 static struct acpi_driver eeepc_hotk_driver = {
 192         .name = EEEPC_HOTK_NAME,
 193         .class = EEEPC_HOTK_CLASS,
 194         .ids = eeepc_device_ids,
 195         .ops = {
 196                 .add = eeepc_hotk_add,
 197                 .remove = eeepc_hotk_remove,
 198                 .resume = eeepc_hotk_resume,
 199         },
 200 };
 201
 202 /* The backlight device /sys/class/backlight */
 203 static struct backlight_device *eeepc_backlight_device;
 204
 205 /* The hwmon device */
 206 static struct device *eeepc_hwmon_device;
 207
 208 /*
 209  * The backlight class declaration
 210  */
 211 static int read_brightness(struct backlight_device *bd);
 212 static int update_bl_status(struct backlight_device *bd);
 213 static struct backlight_ops eeepcbl_ops = {
 214         .get_brightness = read_brightness,
 215         .update_status = update_bl_status,
 216 };
 217
 218 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
 219 MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
 220 MODULE_LICENSE("GPL");
 221
 222 /*
 223  * ACPI Helpers
 224  */
 225 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 226                           struct acpi_buffer *output)
 227 {
 228         struct acpi_object_list params;
 229         union acpi_object in_obj;
 230         acpi_status status;
 231
 232         params.count = 1;
 233         params.pointer = &in_obj;
 234         in_obj.type = ACPI_TYPE_INTEGER;
 235         in_obj.integer.value = val;
 236
 237         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 238         return (status == AE_OK ? 0 : -1);
 239 }
 240
 241 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 242 {
 243         acpi_status status;
 244         unsigned long long result;
 245
 246         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 247         if (ACPI_FAILURE(status)) {
 248                 *val = -1;
 249                 return -1;
 250         } else {
 251                 *val = result;
 252                 return 0;
 253         }
 254 }
 255
 256 static int set_acpi(int cm, int value)
 257 {
 258         if (ehotk->cm_supported & (0x1 << cm)) {
 259                 const char *method = cm_setv[cm];
 260                 if (method == NULL)
 261                         return -ENODEV;
 262                 if (write_acpi_int(ehotk->handle, method, value, NULL))
 263                         printk(EEEPC_WARNING "Error writing %s\n", method);
 264         }
 265         return 0;
 266 }
 267
 268 static int get_acpi(int cm)
 269 {
 270         int value = -1;
 271         if ((ehotk->cm_supported & (0x1 << cm))) {
 272                 const char *method = cm_getv[cm];
 273                 if (method == NULL)
 274                         return -ENODEV;
 275                 if (read_acpi_int(ehotk->handle, method, &value))
 276                         printk(EEEPC_WARNING "Error reading %s\n", method);
 277         }
 278         return value;
 279 }
 280
 281 /*
 282  * Backlight
 283  */
 284 static int read_brightness(struct backlight_device *bd)
 285 {
 286         return get_acpi(CM_ASL_PANELBRIGHT);
 287 }
 288
 289 static int set_brightness(struct backlight_device *bd, int value)
 290 {
 291         value = max(0, min(15, value));
 292         return set_acpi(CM_ASL_PANELBRIGHT, value);
 293 }
 294
 295 static int update_bl_status(struct backlight_device *bd)
 296 {
 297         return set_brightness(bd, bd->props.brightness);
 298 }
 299
 300 /*
 301  * Rfkill helpers
 302  */
 303
 304 static bool eeepc_wlan_rfkill_blocked(void)
 305 {
 306         if (get_acpi(CM_ASL_WLAN) == 1)
 307                 return false;
 308         return true;
 309 }
 310
 311 static int eeepc_rfkill_set(void *data, bool blocked)
 312 {
 313         unsigned long asl = (unsigned long)data;
 314         return set_acpi(asl, !blocked);
 315 }
 316
 317 static const struct rfkill_ops eeepc_rfkill_ops = {
 318         .set_block = eeepc_rfkill_set,
 319 };
 320
 321 /*
 322  * Sys helpers
 323  */
 324 static int parse_arg(const char *buf, unsigned long count, int *val)
 325 {
 326         if (!count)
 327                 return 0;
 328         if (sscanf(buf, "%i", val) != 1)
 329                 return -EINVAL;
 330         return count;
 331 }
 332
 333 static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
 334 {
 335         int rv, value;
 336
 337         rv = parse_arg(buf, count, &value);
 338         if (rv > 0)
 339                 set_acpi(cm, value);
 340         return rv;
 341 }
 342
 343 static ssize_t show_sys_acpi(int cm, char *buf)
 344 {
 345         return sprintf(buf, "%d\n", get_acpi(cm));
 346 }
 347
 348 #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm)                            \
 349         static ssize_t show_##_name(struct device *dev,                 \
 350                                     struct device_attribute *attr,      \
 351                                     char *buf)                          \
 352         {                                                               \
 353                 return show_sys_acpi(_cm, buf);                         \
 354         }                                                               \
 355         static ssize_t store_##_name(struct device *dev,                \
 356                                      struct device_attribute *attr,     \
 357                                      const char *buf, size_t count)     \
 358         {                                                               \
 359                 return store_sys_acpi(_cm, buf, count);                 \
 360         }                                                               \
 361         static struct device_attribute dev_attr_##_name = {             \
 362                 .attr = {                                               \
 363                         .name = __stringify(_name),                     \
 364                         .mode = 0644 },                                 \
 365                 .show   = show_##_name,                                 \
 366                 .store  = store_##_name,                                \
 367         }
 368
 369 EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
 370 EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
 371 EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
 372 EEEPC_CREATE_DEVICE_ATTR(cpufv, CM_ASL_CPUFV);
 373
 374 static struct attribute *platform_attributes[] = {
 375         &dev_attr_camera.attr,
 376         &dev_attr_cardr.attr,
 377         &dev_attr_disp.attr,
 378         &dev_attr_cpufv.attr,
 379         NULL
 380 };
 381
 382 static struct attribute_group platform_attribute_group = {
 383         .attrs = platform_attributes
 384 };
 385
 386 /*
 387  * Hotkey functions
 388  */
 389 static struct key_entry *eepc_get_entry_by_scancode(int code)
 390 {
 391         struct key_entry *key;
 392
 393         for (key = eeepc_keymap; key->type != KE_END; key++)
 394                 if (code == key->code)
 395                         return key;
 396
 397         return NULL;
 398 }
 399
 400 static struct key_entry *eepc_get_entry_by_keycode(int code)
 401 {
 402         struct key_entry *key;
 403
 404         for (key = eeepc_keymap; key->type != KE_END; key++)
 405                 if (code == key->keycode && key->type == KE_KEY)
 406                         return key;
 407
 408         return NULL;
 409 }
 410
 411 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
 412 {
 413         struct key_entry *key = eepc_get_entry_by_scancode(scancode);
 414
 415         if (key && key->type == KE_KEY) {
 416                 *keycode = key->keycode;
 417                 return 0;
 418         }
 419
 420         return -EINVAL;
 421 }
 422
 423 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 424 {
 425         struct key_entry *key;
 426         int old_keycode;
 427
 428         if (keycode < 0 || keycode > KEY_MAX)
 429                 return -EINVAL;
 430
 431         key = eepc_get_entry_by_scancode(scancode);
 432         if (key && key->type == KE_KEY) {
 433                 old_keycode = key->keycode;
 434                 key->keycode = keycode;
 435                 set_bit(keycode, dev->keybit);
 436                 if (!eepc_get_entry_by_keycode(old_keycode))
 437                         clear_bit(old_keycode, dev->keybit);
 438                 return 0;
 439         }
 440
 441         return -EINVAL;
 442 }
 443
 444 static int eeepc_hotk_check(void)
 445 {
 446         const struct key_entry *key;
 447         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 448         int result;
 449
 450         result = acpi_bus_get_status(ehotk->device);
 451         if (result)
 452                 return result;
 453         if (ehotk->device->status.present) {
 454                 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
 455                                     &buffer)) {
 456                         printk(EEEPC_ERR "Hotkey initialization failed\n");
 457                         return -ENODEV;
 458                 } else {
 459                         printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
 460                                ehotk->init_flag);
 461                 }
 462                 /* get control methods supported */
 463                 if (read_acpi_int(ehotk->handle, "CMSG"
 464                                    , &ehotk->cm_supported)) {
 465                         printk(EEEPC_ERR
 466                                "Get control methods supported failed\n");
 467                         return -ENODEV;
 468                 } else {
 469                         printk(EEEPC_INFO
 470                                "Get control methods supported: 0x%x\n",
 471                                ehotk->cm_supported);
 472                 }
 473                 ehotk->inputdev = input_allocate_device();
 474                 if (!ehotk->inputdev) {
 475                         printk(EEEPC_INFO "Unable to allocate input device\n");
 476                         return 0;
 477                 }
 478                 ehotk->inputdev->name = "Asus EeePC extra buttons";
 479                 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
 480                 ehotk->inputdev->id.bustype = BUS_HOST;
 481                 ehotk->inputdev->getkeycode = eeepc_getkeycode;
 482                 ehotk->inputdev->setkeycode = eeepc_setkeycode;
 483
 484                 for (key = eeepc_keymap; key->type != KE_END; key++) {
 485                         switch (key->type) {
 486                         case KE_KEY:
 487                                 set_bit(EV_KEY, ehotk->inputdev->evbit);
 488                                 set_bit(key->keycode, ehotk->inputdev->keybit);
 489                                 break;
 490                         }
 491                 }
 492                 result = input_register_device(ehotk->inputdev);
 493                 if (result) {
 494                         printk(EEEPC_INFO "Unable to register input device\n");
 495                         input_free_device(ehotk->inputdev);
 496                         return 0;
 497                 }
 498         } else {
 499                 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
 500                 return -EINVAL;
 501         }
 502         return 0;
 503 }
 504
 505 static int notify_brn(void)
 506 {
 507         /* returns the *previous* brightness, or -1 */
 508         struct backlight_device *bd = eeepc_backlight_device;
 509         if (bd) {
 510                 int old = bd->props.brightness;
 511                 bd->props.brightness = read_brightness(bd);
 512                 return old;
 513         }
 514         return -1;
 515 }
 516
 517 static void eeepc_rfkill_hotplug(void)
 518 {
 519         struct pci_dev *dev;
 520         struct pci_bus *bus = pci_find_bus(0, 1);
 521         bool blocked;
 522
 523         if (!bus) {
 524                 printk(EEEPC_WARNING "Unable to find PCI bus 1?\n");
 525                 return;
 526         }
 527
 528         blocked = eeepc_wlan_rfkill_blocked();
 529         if (!blocked) {
 530                 dev = pci_get_slot(bus, 0);
 531                 if (dev) {
 532                         /* Device already present */
 533                         pci_dev_put(dev);
 534                         return;
 535                 }
 536                 dev = pci_scan_single_device(bus, 0);
 537                 if (dev) {
 538                         pci_bus_assign_resources(bus);
 539                         if (pci_bus_add_device(dev))
 540                                 printk(EEEPC_ERR "Unable to hotplug wifi\n");
 541                 }
 542         } else {
 543                 dev = pci_get_slot(bus, 0);
 544                 if (dev) {
 545                         pci_remove_bus_device(dev);
 546                         pci_dev_put(dev);
 547                 }
 548         }
 549
 550         rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill, blocked);
 551 }
 552
 553 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 554 {
 555         if (event != ACPI_NOTIFY_BUS_CHECK)
 556                 return;
 557
 558         eeepc_rfkill_hotplug();
 559 }
 560
 561 static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
 562 {
 563         static struct key_entry *key;
 564         u16 count;
 565         int brn = -ENODEV;
 566
 567         if (!ehotk)
 568                 return;
 569         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
 570                 brn = notify_brn();
 571         count = ehotk->event_count[event % 128]++;
 572         acpi_bus_generate_proc_event(ehotk->device, event, count);
 573         acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
 574                                         dev_name(&ehotk->device->dev), event,
 575                                         count);
 576         if (ehotk->inputdev) {
 577                 if (brn != -ENODEV) {
 578                         /* brightness-change events need special
 579                          * handling for conversion to key events
 580                          */
 581                         if (brn < 0)
 582                                 brn = event;
 583                         else
 584                                 brn += NOTIFY_BRN_MIN;
 585                         if (event < brn)
 586                                 event = NOTIFY_BRN_MIN; /* brightness down */
 587                         else if (event > brn)
 588                                 event = NOTIFY_BRN_MIN + 2; /* ... up */
 589                         else
 590                                 event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
 591                 }
 592                 key = eepc_get_entry_by_scancode(event);
 593                 if (key) {
 594                         switch (key->type) {
 595                         case KE_KEY:
 596                                 input_report_key(ehotk->inputdev, key->keycode,
 597                                                  1);
 598                                 input_sync(ehotk->inputdev);
 599                                 input_report_key(ehotk->inputdev, key->keycode,
 600                                                  0);
 601                                 input_sync(ehotk->inputdev);
 602                                 break;
 603                         }
 604                 }
 605         }
 606 }
 607
 608 static int eeepc_register_rfkill_notifier(char *node)
 609 {
 610         acpi_status status = AE_OK;
 611         acpi_handle handle;
 612
 613         status = acpi_get_handle(NULL, node, &handle);
 614
 615         if (ACPI_SUCCESS(status)) {
 616                 status = acpi_install_notify_handler(handle,
 617                                                      ACPI_SYSTEM_NOTIFY,
 618                                                      eeepc_rfkill_notify,
 619                                                      NULL);
 620                 if (ACPI_FAILURE(status))
 621                         printk(EEEPC_WARNING
 622                                "Failed to register notify on %s\n", node);
 623         } else
 624                 return -ENODEV;
 625
 626         return 0;
 627 }
 628
 629 static void eeepc_unregister_rfkill_notifier(char *node)
 630 {
 631         acpi_status status = AE_OK;
 632         acpi_handle handle;
 633
 634         status = acpi_get_handle(NULL, node, &handle);
 635
 636         if (ACPI_SUCCESS(status)) {
 637                 status = acpi_remove_notify_handler(handle,
 638                                                      ACPI_SYSTEM_NOTIFY,
 639                                                      eeepc_rfkill_notify);
 640                 if (ACPI_FAILURE(status))
 641                         printk(EEEPC_ERR
 642                                "Error removing rfkill notify handler %s\n",
 643                                 node);
 644         }
 645 }
 646
 647 static int eeepc_hotk_add(struct acpi_device *device)
 648 {
 649         acpi_status status = AE_OK;
 650         int result;
 651
 652         if (!device)
 653                  return -EINVAL;
 654         printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
 655         ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
 656         if (!ehotk)
 657                 return -ENOMEM;
 658         ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
 659         ehotk->handle = device->handle;
 660         strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
 661         strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
 662         device->driver_data = ehotk;
 663         ehotk->device = device;
 664         result = eeepc_hotk_check();
 665         if (result)
 666                 goto ehotk_fail;
 667         status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 668                                              eeepc_hotk_notify, ehotk);
 669         if (ACPI_FAILURE(status))
 670                 printk(EEEPC_ERR "Error installing notify handler\n");
 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         acpi_status status = 0;
 729
 730         if (!device || !acpi_driver_data(device))
 731                  return -EINVAL;
 732         status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 733                                             eeepc_hotk_notify);
 734         if (ACPI_FAILURE(status))
 735                 printk(EEEPC_ERR "Error removing notify handler\n");
 736
 737         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 738         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 739
 740         kfree(ehotk);
 741         return 0;
 742 }
 743
 744 static int eeepc_hotk_resume(struct acpi_device *device)
 745 {
 746         if (ehotk->eeepc_wlan_rfkill) {
 747                 bool wlan;
 748
 749                 /* Workaround - it seems that _PTS disables the wireless
 750                    without notification or changing the value read by WLAN.
 751                    Normally this is fine because the correct value is restored
 752                    from the non-volatile storage on resume, but we need to do
 753                    it ourself if case suspend is aborted, or we lose wireless.
 754                  */
 755                 wlan = get_acpi(CM_ASL_WLAN);
 756                 set_acpi(CM_ASL_WLAN, wlan);
 757
 758                 rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill,
 759                                     wlan != 1);
 760
 761                 eeepc_rfkill_hotplug();
 762         }
 763
 764         if (ehotk->eeepc_bluetooth_rfkill)
 765                 rfkill_set_sw_state(ehotk->eeepc_bluetooth_rfkill,
 766                                     get_acpi(CM_ASL_BLUETOOTH) != 1);
 767
 768         return 0;
 769 }
 770
 771 /*
 772  * Hwmon
 773  */
 774 static int eeepc_get_fan_pwm(void)
 775 {
 776         int value = 0;
 777
 778         read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
 779         value = value * 255 / 100;
 780         return (value);
 781 }
 782
 783 static void eeepc_set_fan_pwm(int value)
 784 {
 785         value = SENSORS_LIMIT(value, 0, 255);
 786         value = value * 100 / 255;
 787         ec_write(EEEPC_EC_SC02, value);
 788 }
 789
 790 static int eeepc_get_fan_rpm(void)
 791 {
 792         int high = 0;
 793         int low = 0;
 794
 795         read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
 796         read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
 797         return (high << 8 | low);
 798 }
 799
 800 static int eeepc_get_fan_ctrl(void)
 801 {
 802         int value = 0;
 803
 804         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 805         return ((value & 0x02 ? 1 : 0));
 806 }
 807
 808 static void eeepc_set_fan_ctrl(int manual)
 809 {
 810         int value = 0;
 811
 812         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 813         if (manual)
 814                 value |= 0x02;
 815         else
 816                 value &= ~0x02;
 817         ec_write(EEEPC_EC_SFB3, value);
 818 }
 819
 820 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 821 {
 822         int rv, value;
 823
 824         rv = parse_arg(buf, count, &value);
 825         if (rv > 0)
 826                 set(value);
 827         return rv;
 828 }
 829
 830 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 831 {
 832         return sprintf(buf, "%d\n", get());
 833 }
 834
 835 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
 836         static ssize_t show_##_name(struct device *dev,                 \
 837                                     struct device_attribute *attr,      \
 838                                     char *buf)                          \
 839         {                                                               \
 840                 return show_sys_hwmon(_set, buf);                       \
 841         }                                                               \
 842         static ssize_t store_##_name(struct device *dev,                \
 843                                      struct device_attribute *attr,     \
 844                                      const char *buf, size_t count)     \
 845         {                                                               \
 846                 return store_sys_hwmon(_get, buf, count);               \
 847         }                                                               \
 848         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
 849
 850 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
 851 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
 852                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
 853 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 854                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
 855
 856 static ssize_t
 857 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 858 {
 859         return sprintf(buf, "eeepc\n");
 860 }
 861 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 862
 863 static struct attribute *hwmon_attributes[] = {
 864         &sensor_dev_attr_pwm1.dev_attr.attr,
 865         &sensor_dev_attr_fan1_input.dev_attr.attr,
 866         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 867         &sensor_dev_attr_name.dev_attr.attr,
 868         NULL
 869 };
 870
 871 static struct attribute_group hwmon_attribute_group = {
 872         .attrs = hwmon_attributes
 873 };
 874
 875 /*
 876  * exit/init
 877  */
 878 static void eeepc_backlight_exit(void)
 879 {
 880         if (eeepc_backlight_device)
 881                 backlight_device_unregister(eeepc_backlight_device);
 882         eeepc_backlight_device = NULL;
 883 }
 884
 885 static void eeepc_rfkill_exit(void)
 886 {
 887         if (ehotk->eeepc_wlan_rfkill)
 888                 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 889         if (ehotk->eeepc_bluetooth_rfkill)
 890                 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
 891 }
 892
 893 static void eeepc_input_exit(void)
 894 {
 895         if (ehotk->inputdev)
 896                 input_unregister_device(ehotk->inputdev);
 897 }
 898
 899 static void eeepc_hwmon_exit(void)
 900 {
 901         struct device *hwmon;
 902
 903         hwmon = eeepc_hwmon_device;
 904         if (!hwmon)
 905                 return ;
 906         sysfs_remove_group(&hwmon->kobj,
 907                            &hwmon_attribute_group);
 908         hwmon_device_unregister(hwmon);
 909         eeepc_hwmon_device = NULL;
 910 }
 911
 912 static void __exit eeepc_laptop_exit(void)
 913 {
 914         eeepc_backlight_exit();
 915         eeepc_rfkill_exit();
 916         eeepc_input_exit();
 917         eeepc_hwmon_exit();
 918         acpi_bus_unregister_driver(&eeepc_hotk_driver);
 919         sysfs_remove_group(&platform_device->dev.kobj,
 920                            &platform_attribute_group);
 921         platform_device_unregister(platform_device);
 922         platform_driver_unregister(&platform_driver);
 923 }
 924
 925 static int eeepc_backlight_init(struct device *dev)
 926 {
 927         struct backlight_device *bd;
 928
 929         bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
 930                                        NULL, &eeepcbl_ops);
 931         if (IS_ERR(bd)) {
 932                 printk(EEEPC_ERR
 933                        "Could not register eeepc backlight device\n");
 934                 eeepc_backlight_device = NULL;
 935                 return PTR_ERR(bd);
 936         }
 937         eeepc_backlight_device = bd;
 938         bd->props.max_brightness = 15;
 939         bd->props.brightness = read_brightness(NULL);
 940         bd->props.power = FB_BLANK_UNBLANK;
 941         backlight_update_status(bd);
 942         return 0;
 943 }
 944
 945 static int eeepc_hwmon_init(struct device *dev)
 946 {
 947         struct device *hwmon;
 948         int result;
 949
 950         hwmon = hwmon_device_register(dev);
 951         if (IS_ERR(hwmon)) {
 952                 printk(EEEPC_ERR
 953                        "Could not register eeepc hwmon device\n");
 954                 eeepc_hwmon_device = NULL;
 955                 return PTR_ERR(hwmon);
 956         }
 957         eeepc_hwmon_device = hwmon;
 958         result = sysfs_create_group(&hwmon->kobj,
 959                                     &hwmon_attribute_group);
 960         if (result)
 961                 eeepc_hwmon_exit();
 962         return result;
 963 }
 964
 965 static int __init eeepc_laptop_init(void)
 966 {
 967         struct device *dev;
 968         int result;
 969
 970         if (acpi_disabled)
 971                 return -ENODEV;
 972         result = acpi_bus_register_driver(&eeepc_hotk_driver);
 973         if (result < 0)
 974                 return result;
 975         if (!ehotk) {
 976                 acpi_bus_unregister_driver(&eeepc_hotk_driver);
 977                 return -ENODEV;
 978         }
 979         dev = acpi_get_physical_device(ehotk->device->handle);
 980
 981         if (!acpi_video_backlight_support()) {
 982                 result = eeepc_backlight_init(dev);
 983                 if (result)
 984                         goto fail_backlight;
 985         } else
 986                 printk(EEEPC_INFO "Backlight controlled by ACPI video "
 987                        "driver\n");
 988
 989         result = eeepc_hwmon_init(dev);
 990         if (result)
 991                 goto fail_hwmon;
 992         /* Register platform stuff */
 993         result = platform_driver_register(&platform_driver);
 994         if (result)
 995                 goto fail_platform_driver;
 996         platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
 997         if (!platform_device) {
 998                 result = -ENOMEM;
 999                 goto fail_platform_device1;
1000         }
1001         result = platform_device_add(platform_device);
1002         if (result)
1003                 goto fail_platform_device2;
1004         result = sysfs_create_group(&platform_device->dev.kobj,
1005                                     &platform_attribute_group);
1006         if (result)
1007                 goto fail_sysfs;
1008         return 0;
1009 fail_sysfs:
1010         platform_device_del(platform_device);
1011 fail_platform_device2:
1012         platform_device_put(platform_device);
1013 fail_platform_device1:
1014         platform_driver_unregister(&platform_driver);
1015 fail_platform_driver:
1016         eeepc_hwmon_exit();
1017 fail_hwmon:
1018         eeepc_backlight_exit();
1019 fail_backlight:
1020         eeepc_input_exit();
1021         eeepc_rfkill_exit();
1022         return result;
1023 }
1024
1025 module_init(eeepc_laptop_init);
1026 module_exit(eeepc_laptop_exit);