drivers/platform/x86/eeepc-laptop.c

   1 /*
   2  *  eeepc-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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24 #include <linux/types.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/backlight.h>
  27 #include <linux/fb.h>
  28 #include <linux/hwmon.h>
  29 #include <linux/hwmon-sysfs.h>
  30 #include <acpi/acpi_drivers.h>
  31 #include <acpi/acpi_bus.h>
  32 #include <linux/uaccess.h>
  33 #include <linux/input.h>
  34 #include <linux/input/sparse-keymap.h>
  35 #include <linux/rfkill.h>
  36 #include <linux/pci.h>
  37 #include <linux/pci_hotplug.h>
  38 #include <linux/leds.h>
  39 #include <linux/dmi.h>
  40
  41 #define EEEPC_LAPTOP_VERSION    "0.1"
  42 #define EEEPC_LAPTOP_NAME       "Eee PC Hotkey Driver"
  43 #define EEEPC_LAPTOP_FILE       "eeepc"
  44
  45 #define EEEPC_ACPI_CLASS        "hotkey"
  46 #define EEEPC_ACPI_DEVICE_NAME  "Hotkey"
  47 #define EEEPC_ACPI_HID          "ASUS010"
  48
  49 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
  50 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
  51 MODULE_LICENSE("GPL");
  52
  53 static bool hotplug_disabled;
  54
  55 module_param(hotplug_disabled, bool, 0644);
  56 MODULE_PARM_DESC(hotplug_disabled,
  57                  "Disable hotplug for wireless device. "
  58                  "If your laptop need that, please report to "
  59                  "acpi4asus-user@lists.sourceforge.net.");
  60
  61 /*
  62  * Definitions for Asus EeePC
  63  */
  64 #define NOTIFY_BRN_MIN  0x20
  65 #define NOTIFY_BRN_MAX  0x2f
  66
  67 enum {
  68         DISABLE_ASL_WLAN = 0x0001,
  69         DISABLE_ASL_BLUETOOTH = 0x0002,
  70         DISABLE_ASL_IRDA = 0x0004,
  71         DISABLE_ASL_CAMERA = 0x0008,
  72         DISABLE_ASL_TV = 0x0010,
  73         DISABLE_ASL_GPS = 0x0020,
  74         DISABLE_ASL_DISPLAYSWITCH = 0x0040,
  75         DISABLE_ASL_MODEM = 0x0080,
  76         DISABLE_ASL_CARDREADER = 0x0100,
  77         DISABLE_ASL_3G = 0x0200,
  78         DISABLE_ASL_WIMAX = 0x0400,
  79         DISABLE_ASL_HWCF = 0x0800
  80 };
  81
  82 enum {
  83         CM_ASL_WLAN = 0,
  84         CM_ASL_BLUETOOTH,
  85         CM_ASL_IRDA,
  86         CM_ASL_1394,
  87         CM_ASL_CAMERA,
  88         CM_ASL_TV,
  89         CM_ASL_GPS,
  90         CM_ASL_DVDROM,
  91         CM_ASL_DISPLAYSWITCH,
  92         CM_ASL_PANELBRIGHT,
  93         CM_ASL_BIOSFLASH,
  94         CM_ASL_ACPIFLASH,
  95         CM_ASL_CPUFV,
  96         CM_ASL_CPUTEMPERATURE,
  97         CM_ASL_FANCPU,
  98         CM_ASL_FANCHASSIS,
  99         CM_ASL_USBPORT1,
 100         CM_ASL_USBPORT2,
 101         CM_ASL_USBPORT3,
 102         CM_ASL_MODEM,
 103         CM_ASL_CARDREADER,
 104         CM_ASL_3G,
 105         CM_ASL_WIMAX,
 106         CM_ASL_HWCF,
 107         CM_ASL_LID,
 108         CM_ASL_TYPE,
 109         CM_ASL_PANELPOWER,      /*P901*/
 110         CM_ASL_TPD
 111 };
 112
 113 static const char *cm_getv[] = {
 114         "WLDG", "BTHG", NULL, NULL,
 115         "CAMG", NULL, NULL, NULL,
 116         NULL, "PBLG", NULL, NULL,
 117         "CFVG", NULL, NULL, NULL,
 118         "USBG", NULL, NULL, "MODG",
 119         "CRDG", "M3GG", "WIMG", "HWCF",
 120         "LIDG", "TYPE", "PBPG", "TPDG"
 121 };
 122
 123 static const char *cm_setv[] = {
 124         "WLDS", "BTHS", NULL, NULL,
 125         "CAMS", NULL, NULL, NULL,
 126         "SDSP", "PBLS", "HDPS", NULL,
 127         "CFVS", NULL, NULL, NULL,
 128         "USBG", NULL, NULL, "MODS",
 129         "CRDS", "M3GS", "WIMS", NULL,
 130         NULL, NULL, "PBPS", "TPDS"
 131 };
 132
 133 static const struct key_entry eeepc_keymap[] = {
 134         { KE_KEY, 0x10, { KEY_WLAN } },
 135         { KE_KEY, 0x11, { KEY_WLAN } },
 136         { KE_KEY, 0x12, { KEY_PROG1 } },
 137         { KE_KEY, 0x13, { KEY_MUTE } },
 138         { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
 139         { KE_KEY, 0x15, { KEY_VOLUMEUP } },
 140         { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
 141         { KE_KEY, 0x1a, { KEY_COFFEE } },
 142         { KE_KEY, 0x1b, { KEY_ZOOM } },
 143         { KE_KEY, 0x1c, { KEY_PROG2 } },
 144         { KE_KEY, 0x1d, { KEY_PROG3 } },
 145         { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
 146         { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
 147         { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
 148         { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
 149         { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
 150         { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
 151         { KE_KEY, 0x38, { KEY_F14 } },
 152         { KE_END, 0 },
 153 };
 154
 155 /*
 156  * This is the main structure, we can use it to store useful information
 157  */
 158 struct eeepc_laptop {
 159         acpi_handle handle;             /* the handle of the acpi device */
 160         u32 cm_supported;               /* the control methods supported
 161                                            by this BIOS */
 162         bool cpufv_disabled;
 163         bool hotplug_disabled;
 164         u16 event_count[128];           /* count for each event */
 165
 166         struct platform_device *platform_device;
 167         struct device *hwmon_device;
 168         struct backlight_device *backlight_device;
 169
 170         struct input_dev *inputdev;
 171         struct key_entry *keymap;
 172
 173         struct rfkill *wlan_rfkill;
 174         struct rfkill *bluetooth_rfkill;
 175         struct rfkill *wwan3g_rfkill;
 176         struct rfkill *wimax_rfkill;
 177
 178         struct hotplug_slot *hotplug_slot;
 179         struct mutex hotplug_lock;
 180
 181         struct led_classdev tpd_led;
 182         int tpd_led_wk;
 183         struct workqueue_struct *led_workqueue;
 184         struct work_struct tpd_led_work;
 185 };
 186
 187 /*
 188  * ACPI Helpers
 189  */
 190 static int write_acpi_int(acpi_handle handle, const char *method, int val)
 191 {
 192         struct acpi_object_list params;
 193         union acpi_object in_obj;
 194         acpi_status status;
 195
 196         params.count = 1;
 197         params.pointer = &in_obj;
 198         in_obj.type = ACPI_TYPE_INTEGER;
 199         in_obj.integer.value = val;
 200
 201         status = acpi_evaluate_object(handle, (char *)method, &params, NULL);
 202         return (status == AE_OK ? 0 : -1);
 203 }
 204
 205 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 206 {
 207         acpi_status status;
 208         unsigned long long result;
 209
 210         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 211         if (ACPI_FAILURE(status)) {
 212                 *val = -1;
 213                 return -1;
 214         } else {
 215                 *val = result;
 216                 return 0;
 217         }
 218 }
 219
 220 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
 221 {
 222         const char *method = cm_setv[cm];
 223
 224         if (method == NULL)
 225                 return -ENODEV;
 226         if ((eeepc->cm_supported & (0x1 << cm)) == 0)
 227                 return -ENODEV;
 228
 229         if (write_acpi_int(eeepc->handle, method, value))
 230                 pr_warning("Error writing %s\n", method);
 231         return 0;
 232 }
 233
 234 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
 235 {
 236         const char *method = cm_getv[cm];
 237         int value;
 238
 239         if (method == NULL)
 240                 return -ENODEV;
 241         if ((eeepc->cm_supported & (0x1 << cm)) == 0)
 242                 return -ENODEV;
 243
 244         if (read_acpi_int(eeepc->handle, method, &value))
 245                 pr_warning("Error reading %s\n", method);
 246         return value;
 247 }
 248
 249 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
 250                               acpi_handle *handle)
 251 {
 252         const char *method = cm_setv[cm];
 253         acpi_status status;
 254
 255         if (method == NULL)
 256                 return -ENODEV;
 257         if ((eeepc->cm_supported & (0x1 << cm)) == 0)
 258                 return -ENODEV;
 259
 260         status = acpi_get_handle(eeepc->handle, (char *)method,
 261                                  handle);
 262         if (status != AE_OK) {
 263                 pr_warning("Error finding %s\n", method);
 264                 return -ENODEV;
 265         }
 266         return 0;
 267 }
 268
 269
 270 /*
 271  * Sys helpers
 272  */
 273 static int parse_arg(const char *buf, unsigned long count, int *val)
 274 {
 275         if (!count)
 276                 return 0;
 277         if (sscanf(buf, "%i", val) != 1)
 278                 return -EINVAL;
 279         return count;
 280 }
 281
 282 static ssize_t store_sys_acpi(struct device *dev, int cm,
 283                               const char *buf, size_t count)
 284 {
 285         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 286         int rv, value;
 287
 288         rv = parse_arg(buf, count, &value);
 289         if (rv > 0)
 290                 value = set_acpi(eeepc, cm, value);
 291         if (value < 0)
 292                 return -EIO;
 293         return rv;
 294 }
 295
 296 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
 297 {
 298         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 299         int value = get_acpi(eeepc, cm);
 300
 301         if (value < 0)
 302                 return -EIO;
 303         return sprintf(buf, "%d\n", value);
 304 }
 305
 306 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm)                     \
 307         static ssize_t show_##_name(struct device *dev,                 \
 308                                     struct device_attribute *attr,      \
 309                                     char *buf)                          \
 310         {                                                               \
 311                 return show_sys_acpi(dev, _cm, buf);                    \
 312         }                                                               \
 313         static ssize_t store_##_name(struct device *dev,                \
 314                                      struct device_attribute *attr,     \
 315                                      const char *buf, size_t count)     \
 316         {                                                               \
 317                 return store_sys_acpi(dev, _cm, buf, count);            \
 318         }                                                               \
 319         static struct device_attribute dev_attr_##_name = {             \
 320                 .attr = {                                               \
 321                         .name = __stringify(_name),                     \
 322                         .mode = _mode },                                \
 323                 .show   = show_##_name,                                 \
 324                 .store  = store_##_name,                                \
 325         }
 326
 327 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
 328 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
 329 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
 330
 331 struct eeepc_cpufv {
 332         int num;
 333         int cur;
 334 };
 335
 336 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
 337 {
 338         c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
 339         c->num = (c->cur >> 8) & 0xff;
 340         c->cur &= 0xff;
 341         if (c->cur < 0 || c->num <= 0 || c->num > 12)
 342                 return -ENODEV;
 343         return 0;
 344 }
 345
 346 static ssize_t show_available_cpufv(struct device *dev,
 347                                     struct device_attribute *attr,
 348                                     char *buf)
 349 {
 350         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 351         struct eeepc_cpufv c;
 352         int i;
 353         ssize_t len = 0;
 354
 355         if (get_cpufv(eeepc, &c))
 356                 return -ENODEV;
 357         for (i = 0; i < c.num; i++)
 358                 len += sprintf(buf + len, "%d ", i);
 359         len += sprintf(buf + len, "\n");
 360         return len;
 361 }
 362
 363 static ssize_t show_cpufv(struct device *dev,
 364                           struct device_attribute *attr,
 365                           char *buf)
 366 {
 367         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 368         struct eeepc_cpufv c;
 369
 370         if (get_cpufv(eeepc, &c))
 371                 return -ENODEV;
 372         return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
 373 }
 374
 375 static ssize_t store_cpufv(struct device *dev,
 376                            struct device_attribute *attr,
 377                            const char *buf, size_t count)
 378 {
 379         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 380         struct eeepc_cpufv c;
 381         int rv, value;
 382
 383         if (eeepc->cpufv_disabled)
 384                 return -EPERM;
 385         if (get_cpufv(eeepc, &c))
 386                 return -ENODEV;
 387         rv = parse_arg(buf, count, &value);
 388         if (rv < 0)
 389                 return rv;
 390         if (!rv || value < 0 || value >= c.num)
 391                 return -EINVAL;
 392         set_acpi(eeepc, CM_ASL_CPUFV, value);
 393         return rv;
 394 }
 395
 396 static ssize_t show_cpufv_disabled(struct device *dev,
 397                           struct device_attribute *attr,
 398                           char *buf)
 399 {
 400         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 401
 402         return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
 403 }
 404
 405 static ssize_t store_cpufv_disabled(struct device *dev,
 406                            struct device_attribute *attr,
 407                            const char *buf, size_t count)
 408 {
 409         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 410         int rv, value;
 411
 412         rv = parse_arg(buf, count, &value);
 413         if (rv < 0)
 414                 return rv;
 415
 416         switch (value) {
 417         case 0:
 418                 if (eeepc->cpufv_disabled)
 419                         pr_warning("cpufv enabled (not officially supported "
 420                                 "on this model)\n");
 421                 eeepc->cpufv_disabled = false;
 422                 return rv;
 423         case 1:
 424                 return -EPERM;
 425         default:
 426                 return -EINVAL;
 427         }
 428 }
 429
 430
 431 static struct device_attribute dev_attr_cpufv = {
 432         .attr = {
 433                 .name = "cpufv",
 434                 .mode = 0644 },
 435         .show   = show_cpufv,
 436         .store  = store_cpufv
 437 };
 438
 439 static struct device_attribute dev_attr_available_cpufv = {
 440         .attr = {
 441                 .name = "available_cpufv",
 442                 .mode = 0444 },
 443         .show   = show_available_cpufv
 444 };
 445
 446 static struct device_attribute dev_attr_cpufv_disabled = {
 447         .attr = {
 448                 .name = "cpufv_disabled",
 449                 .mode = 0644 },
 450         .show   = show_cpufv_disabled,
 451         .store  = store_cpufv_disabled
 452 };
 453
 454
 455 static struct attribute *platform_attributes[] = {
 456         &dev_attr_camera.attr,
 457         &dev_attr_cardr.attr,
 458         &dev_attr_disp.attr,
 459         &dev_attr_cpufv.attr,
 460         &dev_attr_available_cpufv.attr,
 461         &dev_attr_cpufv_disabled.attr,
 462         NULL
 463 };
 464
 465 static struct attribute_group platform_attribute_group = {
 466         .attrs = platform_attributes
 467 };
 468
 469 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
 470 {
 471         int result;
 472
 473         eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
 474         if (!eeepc->platform_device)
 475                 return -ENOMEM;
 476         platform_set_drvdata(eeepc->platform_device, eeepc);
 477
 478         result = platform_device_add(eeepc->platform_device);
 479         if (result)
 480                 goto fail_platform_device;
 481
 482         result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
 483                                     &platform_attribute_group);
 484         if (result)
 485                 goto fail_sysfs;
 486         return 0;
 487
 488 fail_sysfs:
 489         platform_device_del(eeepc->platform_device);
 490 fail_platform_device:
 491         platform_device_put(eeepc->platform_device);
 492         return result;
 493 }
 494
 495 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
 496 {
 497         sysfs_remove_group(&eeepc->platform_device->dev.kobj,
 498                            &platform_attribute_group);
 499         platform_device_unregister(eeepc->platform_device);
 500 }
 501
 502 /*
 503  * LEDs
 504  */
 505 /*
 506  * These functions actually update the LED's, and are called from a
 507  * workqueue. By doing this as separate work rather than when the LED
 508  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 509  * potentially bad time, such as a timer interrupt.
 510  */
 511 static void tpd_led_update(struct work_struct *work)
 512  {
 513         struct eeepc_laptop *eeepc;
 514
 515         eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
 516
 517         set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
 518 }
 519
 520 static void tpd_led_set(struct led_classdev *led_cdev,
 521                         enum led_brightness value)
 522 {
 523         struct eeepc_laptop *eeepc;
 524
 525         eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
 526
 527         eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
 528         queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
 529 }
 530
 531 static int eeepc_led_init(struct eeepc_laptop *eeepc)
 532 {
 533         int rv;
 534
 535         if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
 536                 return 0;
 537
 538         eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
 539         if (!eeepc->led_workqueue)
 540                 return -ENOMEM;
 541         INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
 542
 543         eeepc->tpd_led.name = "eeepc::touchpad";
 544         eeepc->tpd_led.brightness_set = tpd_led_set;
 545         eeepc->tpd_led.max_brightness = 1;
 546
 547         rv = led_classdev_register(&eeepc->platform_device->dev,
 548                                    &eeepc->tpd_led);
 549         if (rv) {
 550                 destroy_workqueue(eeepc->led_workqueue);
 551                 return rv;
 552         }
 553
 554         return 0;
 555 }
 556
 557 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
 558 {
 559         if (eeepc->tpd_led.dev)
 560                 led_classdev_unregister(&eeepc->tpd_led);
 561         if (eeepc->led_workqueue)
 562                 destroy_workqueue(eeepc->led_workqueue);
 563 }
 564
 565
 566 /*
 567  * PCI hotplug (for wlan rfkill)
 568  */
 569 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
 570 {
 571         if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
 572                 return false;
 573         return true;
 574 }
 575
 576 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc)
 577 {
 578         struct pci_dev *dev;
 579         struct pci_bus *bus;
 580         bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
 581
 582         if (eeepc->wlan_rfkill)
 583                 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
 584
 585         mutex_lock(&eeepc->hotplug_lock);
 586
 587         if (eeepc->hotplug_slot) {
 588                 bus = pci_find_bus(0, 1);
 589                 if (!bus) {
 590                         pr_warning("Unable to find PCI bus 1?\n");
 591                         goto out_unlock;
 592                 }
 593
 594                 if (!blocked) {
 595                         dev = pci_get_slot(bus, 0);
 596                         if (dev) {
 597                                 /* Device already present */
 598                                 pci_dev_put(dev);
 599                                 goto out_unlock;
 600                         }
 601                         dev = pci_scan_single_device(bus, 0);
 602                         if (dev) {
 603                                 pci_bus_assign_resources(bus);
 604                                 if (pci_bus_add_device(dev))
 605                                         pr_err("Unable to hotplug wifi\n");
 606                         }
 607                 } else {
 608                         dev = pci_get_slot(bus, 0);
 609                         if (dev) {
 610                                 pci_remove_bus_device(dev);
 611                                 pci_dev_put(dev);
 612                         }
 613                 }
 614         }
 615
 616 out_unlock:
 617         mutex_unlock(&eeepc->hotplug_lock);
 618 }
 619
 620 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 621 {
 622         struct eeepc_laptop *eeepc = data;
 623
 624         if (event != ACPI_NOTIFY_BUS_CHECK)
 625                 return;
 626
 627         eeepc_rfkill_hotplug(eeepc);
 628 }
 629
 630 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
 631                                           char *node)
 632 {
 633         acpi_status status;
 634         acpi_handle handle;
 635
 636         status = acpi_get_handle(NULL, node, &handle);
 637
 638         if (ACPI_SUCCESS(status)) {
 639                 status = acpi_install_notify_handler(handle,
 640                                                      ACPI_SYSTEM_NOTIFY,
 641                                                      eeepc_rfkill_notify,
 642                                                      eeepc);
 643                 if (ACPI_FAILURE(status))
 644                         pr_warning("Failed to register notify on %s\n", node);
 645         } else
 646                 return -ENODEV;
 647
 648         return 0;
 649 }
 650
 651 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
 652                                              char *node)
 653 {
 654         acpi_status status = AE_OK;
 655         acpi_handle handle;
 656
 657         status = acpi_get_handle(NULL, node, &handle);
 658
 659         if (ACPI_SUCCESS(status)) {
 660                 status = acpi_remove_notify_handler(handle,
 661                                                      ACPI_SYSTEM_NOTIFY,
 662                                                      eeepc_rfkill_notify);
 663                 if (ACPI_FAILURE(status))
 664                         pr_err("Error removing rfkill notify handler %s\n",
 665                                 node);
 666         }
 667 }
 668
 669 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
 670                                     u8 *value)
 671 {
 672         struct eeepc_laptop *eeepc = hotplug_slot->private;
 673         int val = get_acpi(eeepc, CM_ASL_WLAN);
 674
 675         if (val == 1 || val == 0)
 676                 *value = val;
 677         else
 678                 return -EINVAL;
 679
 680         return 0;
 681 }
 682
 683 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 684 {
 685         kfree(hotplug_slot->info);
 686         kfree(hotplug_slot);
 687 }
 688
 689 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
 690         .owner = THIS_MODULE,
 691         .get_adapter_status = eeepc_get_adapter_status,
 692         .get_power_status = eeepc_get_adapter_status,
 693 };
 694
 695 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
 696 {
 697         int ret = -ENOMEM;
 698         struct pci_bus *bus = pci_find_bus(0, 1);
 699
 700         if (!bus) {
 701                 pr_err("Unable to find wifi PCI bus\n");
 702                 return -ENODEV;
 703         }
 704
 705         eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 706         if (!eeepc->hotplug_slot)
 707                 goto error_slot;
 708
 709         eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 710                                             GFP_KERNEL);
 711         if (!eeepc->hotplug_slot->info)
 712                 goto error_info;
 713
 714         eeepc->hotplug_slot->private = eeepc;
 715         eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
 716         eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
 717         eeepc_get_adapter_status(eeepc->hotplug_slot,
 718                                  &eeepc->hotplug_slot->info->adapter_status);
 719
 720         ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
 721         if (ret) {
 722                 pr_err("Unable to register hotplug slot - %d\n", ret);
 723                 goto error_register;
 724         }
 725
 726         return 0;
 727
 728 error_register:
 729         kfree(eeepc->hotplug_slot->info);
 730 error_info:
 731         kfree(eeepc->hotplug_slot);
 732         eeepc->hotplug_slot = NULL;
 733 error_slot:
 734         return ret;
 735 }
 736
 737 /*
 738  * Rfkill devices
 739  */
 740 static int eeepc_rfkill_set(void *data, bool blocked)
 741 {
 742         acpi_handle handle = data;
 743
 744         return write_acpi_int(handle, NULL, !blocked);
 745 }
 746
 747 static const struct rfkill_ops eeepc_rfkill_ops = {
 748         .set_block = eeepc_rfkill_set,
 749 };
 750
 751 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
 752                             struct rfkill **rfkill,
 753                             const char *name,
 754                             enum rfkill_type type, int cm)
 755 {
 756         acpi_handle handle;
 757         int result;
 758
 759         result = acpi_setter_handle(eeepc, cm, &handle);
 760         if (result < 0)
 761                 return result;
 762
 763         *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
 764                                &eeepc_rfkill_ops, handle);
 765
 766         if (!*rfkill)
 767                 return -EINVAL;
 768
 769         rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
 770         result = rfkill_register(*rfkill);
 771         if (result) {
 772                 rfkill_destroy(*rfkill);
 773                 *rfkill = NULL;
 774                 return result;
 775         }
 776         return 0;
 777 }
 778
 779 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
 780 {
 781         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
 782         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
 783         eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
 784         if (eeepc->wlan_rfkill) {
 785                 rfkill_unregister(eeepc->wlan_rfkill);
 786                 rfkill_destroy(eeepc->wlan_rfkill);
 787                 eeepc->wlan_rfkill = NULL;
 788         }
 789         /*
 790          * Refresh pci hotplug in case the rfkill state was changed after
 791          * eeepc_unregister_rfkill_notifier()
 792          */
 793         eeepc_rfkill_hotplug(eeepc);
 794         if (eeepc->hotplug_slot)
 795                 pci_hp_deregister(eeepc->hotplug_slot);
 796
 797         if (eeepc->bluetooth_rfkill) {
 798                 rfkill_unregister(eeepc->bluetooth_rfkill);
 799                 rfkill_destroy(eeepc->bluetooth_rfkill);
 800                 eeepc->bluetooth_rfkill = NULL;
 801         }
 802         if (eeepc->wwan3g_rfkill) {
 803                 rfkill_unregister(eeepc->wwan3g_rfkill);
 804                 rfkill_destroy(eeepc->wwan3g_rfkill);
 805                 eeepc->wwan3g_rfkill = NULL;
 806         }
 807         if (eeepc->wimax_rfkill) {
 808                 rfkill_unregister(eeepc->wimax_rfkill);
 809                 rfkill_destroy(eeepc->wimax_rfkill);
 810                 eeepc->wimax_rfkill = NULL;
 811         }
 812 }
 813
 814 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
 815 {
 816         int result = 0;
 817
 818         mutex_init(&eeepc->hotplug_lock);
 819
 820         result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
 821                                   "eeepc-wlan", RFKILL_TYPE_WLAN,
 822                                   CM_ASL_WLAN);
 823
 824         if (result && result != -ENODEV)
 825                 goto exit;
 826
 827         result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
 828                                   "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
 829                                   CM_ASL_BLUETOOTH);
 830
 831         if (result && result != -ENODEV)
 832                 goto exit;
 833
 834         result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
 835                                   "eeepc-wwan3g", RFKILL_TYPE_WWAN,
 836                                   CM_ASL_3G);
 837
 838         if (result && result != -ENODEV)
 839                 goto exit;
 840
 841         result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
 842                                   "eeepc-wimax", RFKILL_TYPE_WIMAX,
 843                                   CM_ASL_WIMAX);
 844
 845         if (result && result != -ENODEV)
 846                 goto exit;
 847
 848         if (eeepc->hotplug_disabled)
 849                 return 0;
 850
 851         result = eeepc_setup_pci_hotplug(eeepc);
 852         /*
 853          * If we get -EBUSY then something else is handling the PCI hotplug -
 854          * don't fail in this case
 855          */
 856         if (result == -EBUSY)
 857                 result = 0;
 858
 859         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
 860         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
 861         eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
 862         /*
 863          * Refresh pci hotplug in case the rfkill state was changed during
 864          * setup.
 865          */
 866         eeepc_rfkill_hotplug(eeepc);
 867
 868 exit:
 869         if (result && result != -ENODEV)
 870                 eeepc_rfkill_exit(eeepc);
 871         return result;
 872 }
 873
 874 /*
 875  * Platform driver - hibernate/resume callbacks
 876  */
 877 static int eeepc_hotk_thaw(struct device *device)
 878 {
 879         struct eeepc_laptop *eeepc = dev_get_drvdata(device);
 880
 881         if (eeepc->wlan_rfkill) {
 882                 bool wlan;
 883
 884                 /*
 885                  * Work around bios bug - acpi _PTS turns off the wireless led
 886                  * during suspend.  Normally it restores it on resume, but
 887                  * we should kick it ourselves in case hibernation is aborted.
 888                  */
 889                 wlan = get_acpi(eeepc, CM_ASL_WLAN);
 890                 set_acpi(eeepc, CM_ASL_WLAN, wlan);
 891         }
 892
 893         return 0;
 894 }
 895
 896 static int eeepc_hotk_restore(struct device *device)
 897 {
 898         struct eeepc_laptop *eeepc = dev_get_drvdata(device);
 899
 900         /* Refresh both wlan rfkill state and pci hotplug */
 901         if (eeepc->wlan_rfkill)
 902                 eeepc_rfkill_hotplug(eeepc);
 903
 904         if (eeepc->bluetooth_rfkill)
 905                 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
 906                                     get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
 907         if (eeepc->wwan3g_rfkill)
 908                 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
 909                                     get_acpi(eeepc, CM_ASL_3G) != 1);
 910         if (eeepc->wimax_rfkill)
 911                 rfkill_set_sw_state(eeepc->wimax_rfkill,
 912                                     get_acpi(eeepc, CM_ASL_WIMAX) != 1);
 913
 914         return 0;
 915 }
 916
 917 static const struct dev_pm_ops eeepc_pm_ops = {
 918         .thaw = eeepc_hotk_thaw,
 919         .restore = eeepc_hotk_restore,
 920 };
 921
 922 static struct platform_driver platform_driver = {
 923         .driver = {
 924                 .name = EEEPC_LAPTOP_FILE,
 925                 .owner = THIS_MODULE,
 926                 .pm = &eeepc_pm_ops,
 927         }
 928 };
 929
 930 /*
 931  * Hwmon device
 932  */
 933
 934 #define EEEPC_EC_SC00      0x61
 935 #define EEEPC_EC_FAN_PWM   (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
 936 #define EEEPC_EC_FAN_HRPM  (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
 937 #define EEEPC_EC_FAN_LRPM  (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
 938
 939 #define EEEPC_EC_SFB0      0xD0
 940 #define EEEPC_EC_FAN_CTRL  (EEEPC_EC_SFB0 + 3) /* Byte containing SF25  */
 941
 942 static int eeepc_get_fan_pwm(void)
 943 {
 944         u8 value = 0;
 945
 946         ec_read(EEEPC_EC_FAN_PWM, &value);
 947         return value * 255 / 100;
 948 }
 949
 950 static void eeepc_set_fan_pwm(int value)
 951 {
 952         value = SENSORS_LIMIT(value, 0, 255);
 953         value = value * 100 / 255;
 954         ec_write(EEEPC_EC_FAN_PWM, value);
 955 }
 956
 957 static int eeepc_get_fan_rpm(void)
 958 {
 959         u8 high = 0;
 960         u8 low = 0;
 961
 962         ec_read(EEEPC_EC_FAN_HRPM, &high);
 963         ec_read(EEEPC_EC_FAN_LRPM, &low);
 964         return high << 8 | low;
 965 }
 966
 967 static int eeepc_get_fan_ctrl(void)
 968 {
 969         u8 value = 0;
 970
 971         ec_read(EEEPC_EC_FAN_CTRL, &value);
 972         if (value & 0x02)
 973                 return 1; /* manual */
 974         else
 975                 return 2; /* automatic */
 976 }
 977
 978 static void eeepc_set_fan_ctrl(int manual)
 979 {
 980         u8 value = 0;
 981
 982         ec_read(EEEPC_EC_FAN_CTRL, &value);
 983         if (manual == 1)
 984                 value |= 0x02;
 985         else
 986                 value &= ~0x02;
 987         ec_write(EEEPC_EC_FAN_CTRL, value);
 988 }
 989
 990 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 991 {
 992         int rv, value;
 993
 994         rv = parse_arg(buf, count, &value);
 995         if (rv > 0)
 996                 set(value);
 997         return rv;
 998 }
 999
1000 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1001 {
1002         return sprintf(buf, "%d\n", get());
1003 }
1004
1005 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
1006         static ssize_t show_##_name(struct device *dev,                 \
1007                                     struct device_attribute *attr,      \
1008                                     char *buf)                          \
1009         {                                                               \
1010                 return show_sys_hwmon(_set, buf);                       \
1011         }                                                               \
1012         static ssize_t store_##_name(struct device *dev,                \
1013                                      struct device_attribute *attr,     \
1014                                      const char *buf, size_t count)     \
1015         {                                                               \
1016                 return store_sys_hwmon(_get, buf, count);               \
1017         }                                                               \
1018         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
1019
1020 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
1021 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
1022                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
1023 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1024                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
1025
1026 static ssize_t
1027 show_name(struct device *dev, struct device_attribute *attr, char *buf)
1028 {
1029         return sprintf(buf, "eeepc\n");
1030 }
1031 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
1032
1033 static struct attribute *hwmon_attributes[] = {
1034         &sensor_dev_attr_pwm1.dev_attr.attr,
1035         &sensor_dev_attr_fan1_input.dev_attr.attr,
1036         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1037         &sensor_dev_attr_name.dev_attr.attr,
1038         NULL
1039 };
1040
1041 static struct attribute_group hwmon_attribute_group = {
1042         .attrs = hwmon_attributes
1043 };
1044
1045 static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc)
1046 {
1047         struct device *hwmon;
1048
1049         hwmon = eeepc->hwmon_device;
1050         if (!hwmon)
1051                 return;
1052         sysfs_remove_group(&hwmon->kobj,
1053                            &hwmon_attribute_group);
1054         hwmon_device_unregister(hwmon);
1055         eeepc->hwmon_device = NULL;
1056 }
1057
1058 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1059 {
1060         struct device *hwmon;
1061         int result;
1062
1063         hwmon = hwmon_device_register(&eeepc->platform_device->dev);
1064         if (IS_ERR(hwmon)) {
1065                 pr_err("Could not register eeepc hwmon device\n");
1066                 eeepc->hwmon_device = NULL;
1067                 return PTR_ERR(hwmon);
1068         }
1069         eeepc->hwmon_device = hwmon;
1070         result = sysfs_create_group(&hwmon->kobj,
1071                                     &hwmon_attribute_group);
1072         if (result)
1073                 eeepc_hwmon_exit(eeepc);
1074         return result;
1075 }
1076
1077 /*
1078  * Backlight device
1079  */
1080 static int read_brightness(struct backlight_device *bd)
1081 {
1082         struct eeepc_laptop *eeepc = bl_get_data(bd);
1083
1084         return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1085 }
1086
1087 static int set_brightness(struct backlight_device *bd, int value)
1088 {
1089         struct eeepc_laptop *eeepc = bl_get_data(bd);
1090
1091         return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1092 }
1093
1094 static int update_bl_status(struct backlight_device *bd)
1095 {
1096         return set_brightness(bd, bd->props.brightness);
1097 }
1098
1099 static struct backlight_ops eeepcbl_ops = {
1100         .get_brightness = read_brightness,
1101         .update_status = update_bl_status,
1102 };
1103
1104 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1105 {
1106         struct backlight_device *bd = eeepc->backlight_device;
1107         int old = bd->props.brightness;
1108
1109         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1110
1111         return old;
1112 }
1113
1114 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1115 {
1116         struct backlight_device *bd;
1117
1118         bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1119                                        &eeepc->platform_device->dev,
1120                                        eeepc, &eeepcbl_ops);
1121         if (IS_ERR(bd)) {
1122                 pr_err("Could not register eeepc backlight device\n");
1123                 eeepc->backlight_device = NULL;
1124                 return PTR_ERR(bd);
1125         }
1126         eeepc->backlight_device = bd;
1127         bd->props.max_brightness = 15;
1128         bd->props.brightness = read_brightness(bd);
1129         bd->props.power = FB_BLANK_UNBLANK;
1130         backlight_update_status(bd);
1131         return 0;
1132 }
1133
1134 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1135 {
1136         if (eeepc->backlight_device)
1137                 backlight_device_unregister(eeepc->backlight_device);
1138         eeepc->backlight_device = NULL;
1139 }
1140
1141
1142 /*
1143  * Input device (i.e. hotkeys)
1144  */
1145 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1146 {
1147         struct input_dev *input;
1148         int error;
1149
1150         input = input_allocate_device();
1151         if (!input) {
1152                 pr_info("Unable to allocate input device\n");
1153                 return -ENOMEM;
1154         }
1155
1156         input->name = "Asus EeePC extra buttons";
1157         input->phys = EEEPC_LAPTOP_FILE "/input0";
1158         input->id.bustype = BUS_HOST;
1159         input->dev.parent = &eeepc->platform_device->dev;
1160
1161         error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1162         if (error) {
1163                 pr_err("Unable to setup input device keymap\n");
1164                 goto err_free_dev;
1165         }
1166
1167         error = input_register_device(input);
1168         if (error) {
1169                 pr_err("Unable to register input device\n");
1170                 goto err_free_keymap;
1171         }
1172
1173         eeepc->inputdev = input;
1174         return 0;
1175
1176  err_free_keymap:
1177         sparse_keymap_free(input);
1178  err_free_dev:
1179         input_free_device(input);
1180         return error;
1181 }
1182
1183 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1184 {
1185         if (eeepc->inputdev) {
1186                 input_unregister_device(eeepc->inputdev);
1187                 kfree(eeepc->keymap);
1188         }
1189 }
1190
1191 /*
1192  * ACPI driver
1193  */
1194 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1195 {
1196         struct eeepc_laptop *eeepc = acpi_driver_data(device);
1197         u16 count;
1198
1199         if (event > ACPI_MAX_SYS_NOTIFY)
1200                 return;
1201         count = eeepc->event_count[event % 128]++;
1202         acpi_bus_generate_proc_event(device, event, count);
1203         acpi_bus_generate_netlink_event(device->pnp.device_class,
1204                                         dev_name(&device->dev), event,
1205                                         count);
1206
1207         /* Brightness events are special */
1208         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
1209
1210                 /* Ignore them completely if the acpi video driver is used */
1211                 if (eeepc->backlight_device != NULL) {
1212                         int old_brightness, new_brightness;
1213
1214                         /* Update the backlight device. */
1215                         old_brightness = eeepc_backlight_notify(eeepc);
1216
1217                         /* Convert event to keypress (obsolescent hack) */
1218                         new_brightness = event - NOTIFY_BRN_MIN;
1219
1220                         if (new_brightness < old_brightness) {
1221                                 event = NOTIFY_BRN_MIN; /* brightness down */
1222                         } else if (new_brightness > old_brightness) {
1223                                 event = NOTIFY_BRN_MAX; /* brightness up */
1224                         } else {
1225                                 /*
1226                                 * no change in brightness - already at min/max,
1227                                 * event will be desired value (or else ignored)
1228                                 */
1229                         }
1230                         sparse_keymap_report_event(eeepc->inputdev, event,
1231                                                    1, true);
1232                 }
1233         } else {
1234                 /* Everything else is a bona-fide keypress event */
1235                 sparse_keymap_report_event(eeepc->inputdev, event, 1, true);
1236         }
1237 }
1238
1239 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1240 {
1241         const char *model;
1242
1243         model = dmi_get_system_info(DMI_PRODUCT_NAME);
1244         if (!model)
1245                 return;
1246
1247         /*
1248          * Blacklist for setting cpufv (cpu speed).
1249          *
1250          * EeePC 4G ("701") implements CFVS, but it is not supported
1251          * by the pre-installed OS, and the original option to change it
1252          * in the BIOS setup screen was removed in later versions.
1253          *
1254          * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1255          * this applies to all "701" models (4G/4G Surf/2G Surf).
1256          *
1257          * So Asus made a deliberate decision not to support it on this model.
1258          * We have several reports that using it can cause the system to hang
1259          *
1260          * The hang has also been reported on a "702" (Model name "8G"?).
1261          *
1262          * We avoid dmi_check_system() / dmi_match(), because they use
1263          * substring matching.  We don't want to affect the "701SD"
1264          * and "701SDX" models, because they do support S.H.E.
1265          */
1266         if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1267                 eeepc->cpufv_disabled = true;
1268                 pr_info("model %s does not officially support setting cpu "
1269                         "speed\n", model);
1270                 pr_info("cpufv disabled to avoid instability\n");
1271         }
1272
1273         /*
1274          * Blacklist for wlan hotplug
1275          *
1276          * Eeepc 1005HA doesn't work like others models and don't need the
1277          * hotplug code. In fact, current hotplug code seems to unplug another
1278          * device...
1279          */
1280         if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0) {
1281                 eeepc->hotplug_disabled = true;
1282                 pr_info("wlan hotplug disabled\n");
1283         }
1284 }
1285
1286 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1287 {
1288         int dummy;
1289
1290         /* Some BIOSes do not report cm although it is avaliable.
1291            Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1292         if (!(eeepc->cm_supported & (1 << cm))
1293             && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1294                 pr_info("%s (%x) not reported by BIOS,"
1295                         " enabling anyway\n", name, 1 << cm);
1296                 eeepc->cm_supported |= 1 << cm;
1297         }
1298 }
1299
1300 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1301 {
1302         cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1303         cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1304         cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1305         cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1306 }
1307
1308 static int eeepc_acpi_init(struct eeepc_laptop *eeepc,
1309                            struct acpi_device *device)
1310 {
1311         unsigned int init_flags;
1312         int result;
1313
1314         result = acpi_bus_get_status(device);
1315         if (result)
1316                 return result;
1317         if (!device->status.present) {
1318                 pr_err("Hotkey device not present, aborting\n");
1319                 return -ENODEV;
1320         }
1321
1322         init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1323         pr_notice("Hotkey init flags 0x%x\n", init_flags);
1324
1325         if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1326                 pr_err("Hotkey initialization failed\n");
1327                 return -ENODEV;
1328         }
1329
1330         /* get control methods supported */
1331         if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1332                 pr_err("Get control methods supported failed\n");
1333                 return -ENODEV;
1334         }
1335         cmsg_quirks(eeepc);
1336         pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1337
1338         return 0;
1339 }
1340
1341 static void __devinit eeepc_enable_camera(struct eeepc_laptop *eeepc)
1342 {
1343         /*
1344          * If the following call to set_acpi() fails, it's because there's no
1345          * camera so we can ignore the error.
1346          */
1347         if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1348                 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1349 }
1350
1351 static bool eeepc_device_present;
1352
1353 static int __devinit eeepc_acpi_add(struct acpi_device *device)
1354 {
1355         struct eeepc_laptop *eeepc;
1356         int result;
1357
1358         pr_notice(EEEPC_LAPTOP_NAME "\n");
1359         eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1360         if (!eeepc)
1361                 return -ENOMEM;
1362         eeepc->handle = device->handle;
1363         strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1364         strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1365         device->driver_data = eeepc;
1366
1367         eeepc->hotplug_disabled = hotplug_disabled;
1368
1369         eeepc_dmi_check(eeepc);
1370
1371         result = eeepc_acpi_init(eeepc, device);
1372         if (result)
1373                 goto fail_platform;
1374         eeepc_enable_camera(eeepc);
1375
1376         /*
1377          * Register the platform device first.  It is used as a parent for the
1378          * sub-devices below.
1379          *
1380          * Note that if there are multiple instances of this ACPI device it
1381          * will bail out, because the platform device is registered with a
1382          * fixed name.  Of course it doesn't make sense to have more than one,
1383          * and machine-specific scripts find the fixed name convenient.  But
1384          * It's also good for us to exclude multiple instances because both
1385          * our hwmon and our wlan rfkill subdevice use global ACPI objects
1386          * (the EC and the wlan PCI slot respectively).
1387          */
1388         result = eeepc_platform_init(eeepc);
1389         if (result)
1390                 goto fail_platform;
1391
1392         if (!acpi_video_backlight_support()) {
1393                 result = eeepc_backlight_init(eeepc);
1394                 if (result)
1395                         goto fail_backlight;
1396         } else
1397                 pr_info("Backlight controlled by ACPI video driver\n");
1398
1399         result = eeepc_input_init(eeepc);
1400         if (result)
1401                 goto fail_input;
1402
1403         result = eeepc_hwmon_init(eeepc);
1404         if (result)
1405                 goto fail_hwmon;
1406
1407         result = eeepc_led_init(eeepc);
1408         if (result)
1409                 goto fail_led;
1410
1411         result = eeepc_rfkill_init(eeepc);
1412         if (result)
1413                 goto fail_rfkill;
1414
1415         eeepc_device_present = true;
1416         return 0;
1417
1418 fail_rfkill:
1419         eeepc_led_exit(eeepc);
1420 fail_led:
1421         eeepc_hwmon_exit(eeepc);
1422 fail_hwmon:
1423         eeepc_input_exit(eeepc);
1424 fail_input:
1425         eeepc_backlight_exit(eeepc);
1426 fail_backlight:
1427         eeepc_platform_exit(eeepc);
1428 fail_platform:
1429         kfree(eeepc);
1430
1431         return result;
1432 }
1433
1434 static int eeepc_acpi_remove(struct acpi_device *device, int type)
1435 {
1436         struct eeepc_laptop *eeepc = acpi_driver_data(device);
1437
1438         eeepc_backlight_exit(eeepc);
1439         eeepc_rfkill_exit(eeepc);
1440         eeepc_input_exit(eeepc);
1441         eeepc_hwmon_exit(eeepc);
1442         eeepc_led_exit(eeepc);
1443         eeepc_platform_exit(eeepc);
1444
1445         kfree(eeepc);
1446         return 0;
1447 }
1448
1449
1450 static const struct acpi_device_id eeepc_device_ids[] = {
1451         {EEEPC_ACPI_HID, 0},
1452         {"", 0},
1453 };
1454 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1455
1456 static struct acpi_driver eeepc_acpi_driver = {
1457         .name = EEEPC_LAPTOP_NAME,
1458         .class = EEEPC_ACPI_CLASS,
1459         .owner = THIS_MODULE,
1460         .ids = eeepc_device_ids,
1461         .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1462         .ops = {
1463                 .add = eeepc_acpi_add,
1464                 .remove = eeepc_acpi_remove,
1465                 .notify = eeepc_acpi_notify,
1466         },
1467 };
1468
1469
1470 static int __init eeepc_laptop_init(void)
1471 {
1472         int result;
1473
1474         result = platform_driver_register(&platform_driver);
1475         if (result < 0)
1476                 return result;
1477
1478         result = acpi_bus_register_driver(&eeepc_acpi_driver);
1479         if (result < 0)
1480                 goto fail_acpi_driver;
1481
1482         if (!eeepc_device_present) {
1483                 result = -ENODEV;
1484                 goto fail_no_device;
1485         }
1486
1487         return 0;
1488
1489 fail_no_device:
1490         acpi_bus_unregister_driver(&eeepc_acpi_driver);
1491 fail_acpi_driver:
1492         platform_driver_unregister(&platform_driver);
1493         return result;
1494 }
1495
1496 static void __exit eeepc_laptop_exit(void)
1497 {
1498         acpi_bus_unregister_driver(&eeepc_acpi_driver);
1499         platform_driver_unregister(&platform_driver);
1500 }
1501
1502 module_init(eeepc_laptop_init);
1503 module_exit(eeepc_laptop_exit);