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Linux/drivers/platform/x86/asus-laptop.c

  1 /*
  2  *  asus-laptop.c - Asus Laptop Support
  3  *
  4  *
  5  *  Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
  6  *  Copyright (C) 2006-2007 Corentin Chary
  7  *  Copyright (C) 2011 Wind River Systems
  8  *
  9  *  This program is free software; you can redistribute it and/or modify
 10  *  it under the terms of the GNU General Public License as published by
 11  *  the Free Software Foundation; either version 2 of the License, or
 12  *  (at your option) any later version.
 13  *
 14  *  This program is distributed in the hope that it will be useful,
 15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  *  GNU General Public License for more details.
 18  *
 19  *  You should have received a copy of the GNU General Public License
 20  *  along with this program; if not, write to the Free Software
 21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 22  *
 23  *
 24  *  The development page for this driver is located at
 25  *  http://sourceforge.net/projects/acpi4asus/
 26  *
 27  *  Credits:
 28  *  Pontus Fuchs   - Helper functions, cleanup
 29  *  Johann Wiesner - Small compile fixes
 30  *  John Belmonte  - ACPI code for Toshiba laptop was a good starting point.
 31  *  Eric Burghard  - LED display support for W1N
 32  *  Josh Green     - Light Sens support
 33  *  Thomas Tuttle  - His first patch for led support was very helpful
 34  *  Sam Lin        - GPS support
 35  */
 36 
 37 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 38 
 39 #include <linux/kernel.h>
 40 #include <linux/module.h>
 41 #include <linux/init.h>
 42 #include <linux/types.h>
 43 #include <linux/err.h>
 44 #include <linux/proc_fs.h>
 45 #include <linux/backlight.h>
 46 #include <linux/fb.h>
 47 #include <linux/leds.h>
 48 #include <linux/platform_device.h>
 49 #include <linux/uaccess.h>
 50 #include <linux/input.h>
 51 #include <linux/input/sparse-keymap.h>
 52 #include <linux/input-polldev.h>
 53 #include <linux/rfkill.h>
 54 #include <linux/slab.h>
 55 #include <linux/dmi.h>
 56 #include <linux/acpi.h>
 57 #include <acpi/video.h>
 58 
 59 #define ASUS_LAPTOP_VERSION     "0.42"
 60 
 61 #define ASUS_LAPTOP_NAME        "Asus Laptop Support"
 62 #define ASUS_LAPTOP_CLASS       "hotkey"
 63 #define ASUS_LAPTOP_DEVICE_NAME "Hotkey"
 64 #define ASUS_LAPTOP_FILE        KBUILD_MODNAME
 65 #define ASUS_LAPTOP_PREFIX      "\\_SB.ATKD."
 66 
 67 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
 68 MODULE_DESCRIPTION(ASUS_LAPTOP_NAME);
 69 MODULE_LICENSE("GPL");
 70 
 71 /*
 72  * WAPF defines the behavior of the Fn+Fx wlan key
 73  * The significance of values is yet to be found, but
 74  * most of the time:
 75  * Bit | Bluetooth | WLAN
 76  *  0  | Hardware  | Hardware
 77  *  1  | Hardware  | Software
 78  *  4  | Software  | Software
 79  */
 80 static uint wapf = 1;
 81 module_param(wapf, uint, 0444);
 82 MODULE_PARM_DESC(wapf, "WAPF value");
 83 
 84 static char *wled_type = "unknown";
 85 static char *bled_type = "unknown";
 86 
 87 module_param(wled_type, charp, 0444);
 88 MODULE_PARM_DESC(wled_type, "Set the wled type on boot "
 89                  "(unknown, led or rfkill). "
 90                  "default is unknown");
 91 
 92 module_param(bled_type, charp, 0444);
 93 MODULE_PARM_DESC(bled_type, "Set the bled type on boot "
 94                  "(unknown, led or rfkill). "
 95                  "default is unknown");
 96 
 97 static int wlan_status = 1;
 98 static int bluetooth_status = 1;
 99 static int wimax_status = -1;
100 static int wwan_status = -1;
101 static int als_status;
102 
103 module_param(wlan_status, int, 0444);
104 MODULE_PARM_DESC(wlan_status, "Set the wireless status on boot "
105                  "(0 = disabled, 1 = enabled, -1 = don't do anything). "
106                  "default is -1");
107 
108 module_param(bluetooth_status, int, 0444);
109 MODULE_PARM_DESC(bluetooth_status, "Set the wireless status on boot "
110                  "(0 = disabled, 1 = enabled, -1 = don't do anything). "
111                  "default is -1");
112 
113 module_param(wimax_status, int, 0444);
114 MODULE_PARM_DESC(wimax_status, "Set the wireless status on boot "
115                  "(0 = disabled, 1 = enabled, -1 = don't do anything). "
116                  "default is -1");
117 
118 module_param(wwan_status, int, 0444);
119 MODULE_PARM_DESC(wwan_status, "Set the wireless status on boot "
120                  "(0 = disabled, 1 = enabled, -1 = don't do anything). "
121                  "default is -1");
122 
123 module_param(als_status, int, 0444);
124 MODULE_PARM_DESC(als_status, "Set the ALS status on boot "
125                  "(0 = disabled, 1 = enabled). "
126                  "default is 0");
127 
128 /*
129  * Some events we use, same for all Asus
130  */
131 #define ATKD_BRNUP_MIN          0x10
132 #define ATKD_BRNUP_MAX          0x1f
133 #define ATKD_BRNDOWN_MIN        0x20
134 #define ATKD_BRNDOWN_MAX        0x2f
135 #define ATKD_BRNDOWN            0x20
136 #define ATKD_BRNUP              0x2f
137 #define ATKD_LCD_ON     0x33
138 #define ATKD_LCD_OFF    0x34
139 
140 /*
141  * Known bits returned by \_SB.ATKD.HWRS
142  */
143 #define WL_HWRS         0x80
144 #define BT_HWRS         0x100
145 
146 /*
147  * Flags for hotk status
148  * WL_ON and BT_ON are also used for wireless_status()
149  */
150 #define WL_RSTS         0x01    /* internal Wifi */
151 #define BT_RSTS         0x02    /* internal Bluetooth */
152 #define WM_RSTS         0x08    /* internal wimax */
153 #define WW_RSTS         0x20    /* internal wwan */
154 
155 /* WLED and BLED type */
156 #define TYPE_UNKNOWN    0
157 #define TYPE_LED        1
158 #define TYPE_RFKILL     2
159 
160 /* LED */
161 #define METHOD_MLED             "MLED"
162 #define METHOD_TLED             "TLED"
163 #define METHOD_RLED             "RLED"  /* W1JC */
164 #define METHOD_PLED             "PLED"  /* A7J */
165 #define METHOD_GLED             "GLED"  /* G1, G2 (probably) */
166 
167 /* LEDD */
168 #define METHOD_LEDD             "SLCM"
169 
170 /*
171  * Bluetooth and WLAN
172  * WLED and BLED are not handled like other XLED, because in some dsdt
173  * they also control the WLAN/Bluetooth device.
174  */
175 #define METHOD_WLAN             "WLED"
176 #define METHOD_BLUETOOTH        "BLED"
177 
178 /* WWAN and WIMAX */
179 #define METHOD_WWAN             "GSMC"
180 #define METHOD_WIMAX            "WMXC"
181 
182 #define METHOD_WL_STATUS        "RSTS"
183 
184 /* Brightness */
185 #define METHOD_BRIGHTNESS_SET   "SPLV"
186 #define METHOD_BRIGHTNESS_GET   "GPLV"
187 
188 /* Display */
189 #define METHOD_SWITCH_DISPLAY   "SDSP"
190 
191 #define METHOD_ALS_CONTROL      "ALSC" /* Z71A Z71V */
192 #define METHOD_ALS_LEVEL        "ALSL" /* Z71A Z71V */
193 
194 /* GPS */
195 /* R2H use different handle for GPS on/off */
196 #define METHOD_GPS_ON           "SDON"
197 #define METHOD_GPS_OFF          "SDOF"
198 #define METHOD_GPS_STATUS       "GPST"
199 
200 /* Keyboard light */
201 #define METHOD_KBD_LIGHT_SET    "SLKB"
202 #define METHOD_KBD_LIGHT_GET    "GLKB"
203 
204 /* For Pegatron Lucid tablet */
205 #define DEVICE_NAME_PEGA        "Lucid"
206 
207 #define METHOD_PEGA_ENABLE      "ENPR"
208 #define METHOD_PEGA_DISABLE     "DAPR"
209 #define PEGA_WLAN       0x00
210 #define PEGA_BLUETOOTH  0x01
211 #define PEGA_WWAN       0x02
212 #define PEGA_ALS        0x04
213 #define PEGA_ALS_POWER  0x05
214 
215 #define METHOD_PEGA_READ        "RDLN"
216 #define PEGA_READ_ALS_H 0x02
217 #define PEGA_READ_ALS_L 0x03
218 
219 #define PEGA_ACCEL_NAME "pega_accel"
220 #define PEGA_ACCEL_DESC "Pegatron Lucid Tablet Accelerometer"
221 #define METHOD_XLRX "XLRX"
222 #define METHOD_XLRY "XLRY"
223 #define METHOD_XLRZ "XLRZ"
224 #define PEGA_ACC_CLAMP 512 /* 1G accel is reported as ~256, so clamp to 2G */
225 #define PEGA_ACC_RETRIES 3
226 
227 /*
228  * Define a specific led structure to keep the main structure clean
229  */
230 struct asus_led {
231         int wk;
232         struct work_struct work;
233         struct led_classdev led;
234         struct asus_laptop *asus;
235         const char *method;
236 };
237 
238 /*
239  * Same thing for rfkill
240  */
241 struct asus_rfkill {
242         /* type of control. Maps to PEGA_* values or *_RSTS  */
243         int control_id;
244         struct rfkill *rfkill;
245         struct asus_laptop *asus;
246 };
247 
248 /*
249  * This is the main structure, we can use it to store anything interesting
250  * about the hotk device
251  */
252 struct asus_laptop {
253         char *name;             /* laptop name */
254 
255         struct acpi_table_header *dsdt_info;
256         struct platform_device *platform_device;
257         struct acpi_device *device;             /* the device we are in */
258         struct backlight_device *backlight_device;
259 
260         struct input_dev *inputdev;
261         struct key_entry *keymap;
262         struct input_polled_dev *pega_accel_poll;
263 
264         struct asus_led wled;
265         struct asus_led bled;
266         struct asus_led mled;
267         struct asus_led tled;
268         struct asus_led rled;
269         struct asus_led pled;
270         struct asus_led gled;
271         struct asus_led kled;
272         struct workqueue_struct *led_workqueue;
273 
274         int wled_type;
275         int bled_type;
276         int wireless_status;
277         bool have_rsts;
278         bool is_pega_lucid;
279         bool pega_acc_live;
280         int pega_acc_x;
281         int pega_acc_y;
282         int pega_acc_z;
283 
284         struct asus_rfkill wlan;
285         struct asus_rfkill bluetooth;
286         struct asus_rfkill wwan;
287         struct asus_rfkill wimax;
288         struct asus_rfkill gps;
289 
290         acpi_handle handle;     /* the handle of the hotk device */
291         u32 ledd_status;        /* status of the LED display */
292         u8 light_level;         /* light sensor level */
293         u8 light_switch;        /* light sensor switch value */
294         u16 event_count[128];   /* count for each event TODO make this better */
295 };
296 
297 static const struct key_entry asus_keymap[] = {
298         /* Lenovo SL Specific keycodes */
299         {KE_KEY, 0x02, { KEY_SCREENLOCK } },
300         {KE_KEY, 0x05, { KEY_WLAN } },
301         {KE_KEY, 0x08, { KEY_F13 } },
302         {KE_KEY, 0x09, { KEY_PROG2 } }, /* Dock */
303         {KE_KEY, 0x17, { KEY_ZOOM } },
304         {KE_KEY, 0x1f, { KEY_BATTERY } },
305         /* End of Lenovo SL Specific keycodes */
306         {KE_KEY, ATKD_BRNDOWN, { KEY_BRIGHTNESSDOWN } },
307         {KE_KEY, ATKD_BRNUP, { KEY_BRIGHTNESSUP } },
308         {KE_KEY, 0x30, { KEY_VOLUMEUP } },
309         {KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
310         {KE_KEY, 0x32, { KEY_MUTE } },
311         {KE_KEY, 0x33, { KEY_DISPLAYTOGGLE } }, /* LCD on */
312         {KE_KEY, 0x34, { KEY_DISPLAY_OFF } }, /* LCD off */
313         {KE_KEY, 0x40, { KEY_PREVIOUSSONG } },
314         {KE_KEY, 0x41, { KEY_NEXTSONG } },
315         {KE_KEY, 0x43, { KEY_STOPCD } }, /* Stop/Eject */
316         {KE_KEY, 0x45, { KEY_PLAYPAUSE } },
317         {KE_KEY, 0x4c, { KEY_MEDIA } }, /* WMP Key */
318         {KE_KEY, 0x50, { KEY_EMAIL } },
319         {KE_KEY, 0x51, { KEY_WWW } },
320         {KE_KEY, 0x55, { KEY_CALC } },
321         {KE_IGNORE, 0x57, },  /* Battery mode */
322         {KE_IGNORE, 0x58, },  /* AC mode */
323         {KE_KEY, 0x5C, { KEY_SCREENLOCK } },  /* Screenlock */
324         {KE_KEY, 0x5D, { KEY_WLAN } }, /* WLAN Toggle */
325         {KE_KEY, 0x5E, { KEY_WLAN } }, /* WLAN Enable */
326         {KE_KEY, 0x5F, { KEY_WLAN } }, /* WLAN Disable */
327         {KE_KEY, 0x60, { KEY_TOUCHPAD_ON } },
328         {KE_KEY, 0x61, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD only */
329         {KE_KEY, 0x62, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT only */
330         {KE_KEY, 0x63, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT */
331         {KE_KEY, 0x64, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV */
332         {KE_KEY, 0x65, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV */
333         {KE_KEY, 0x66, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV */
334         {KE_KEY, 0x67, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV */
335         {KE_KEY, 0x6A, { KEY_TOUCHPAD_TOGGLE } }, /* Lock Touchpad Fn + F9 */
336         {KE_KEY, 0x6B, { KEY_TOUCHPAD_TOGGLE } }, /* Lock Touchpad */
337         {KE_KEY, 0x6C, { KEY_SLEEP } }, /* Suspend */
338         {KE_KEY, 0x6D, { KEY_SLEEP } }, /* Hibernate */
339         {KE_IGNORE, 0x6E, },  /* Low Battery notification */
340         {KE_KEY, 0x7D, { KEY_BLUETOOTH } }, /* Bluetooth Enable */
341         {KE_KEY, 0x7E, { KEY_BLUETOOTH } }, /* Bluetooth Disable */
342         {KE_KEY, 0x82, { KEY_CAMERA } },
343         {KE_KEY, 0x88, { KEY_RFKILL  } }, /* Radio Toggle Key */
344         {KE_KEY, 0x8A, { KEY_PROG1 } }, /* Color enhancement mode */
345         {KE_KEY, 0x8C, { KEY_SWITCHVIDEOMODE } }, /* SDSP DVI only */
346         {KE_KEY, 0x8D, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + DVI */
347         {KE_KEY, 0x8E, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + DVI */
348         {KE_KEY, 0x8F, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + DVI */
349         {KE_KEY, 0x90, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + DVI */
350         {KE_KEY, 0x91, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + DVI */
351         {KE_KEY, 0x92, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + DVI */
352         {KE_KEY, 0x93, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + DVI */
353         {KE_KEY, 0x95, { KEY_MEDIA } },
354         {KE_KEY, 0x99, { KEY_PHONE } },
355         {KE_KEY, 0xA0, { KEY_SWITCHVIDEOMODE } }, /* SDSP HDMI only */
356         {KE_KEY, 0xA1, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + HDMI */
357         {KE_KEY, 0xA2, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + HDMI */
358         {KE_KEY, 0xA3, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + HDMI */
359         {KE_KEY, 0xA4, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + HDMI */
360         {KE_KEY, 0xA5, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + HDMI */
361         {KE_KEY, 0xA6, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + HDMI */
362         {KE_KEY, 0xA7, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + HDMI */
363         {KE_KEY, 0xB5, { KEY_CALC } },
364         {KE_KEY, 0xC4, { KEY_KBDILLUMUP } },
365         {KE_KEY, 0xC5, { KEY_KBDILLUMDOWN } },
366         {KE_END, 0},
367 };
368 
369 
370 /*
371  * This function evaluates an ACPI method, given an int as parameter, the
372  * method is searched within the scope of the handle, can be NULL. The output
373  * of the method is written is output, which can also be NULL
374  *
375  * returns 0 if write is successful, -1 else.
376  */
377 static int write_acpi_int_ret(acpi_handle handle, const char *method, int val,
378                               struct acpi_buffer *output)
379 {
380         struct acpi_object_list params; /* list of input parameters (an int) */
381         union acpi_object in_obj;       /* the only param we use */
382         acpi_status status;
383 
384         if (!handle)
385                 return -1;
386 
387         params.count = 1;
388         params.pointer = &in_obj;
389         in_obj.type = ACPI_TYPE_INTEGER;
390         in_obj.integer.value = val;
391 
392         status = acpi_evaluate_object(handle, (char *)method, &params, output);
393         if (status == AE_OK)
394                 return 0;
395         else
396                 return -1;
397 }
398 
399 static int write_acpi_int(acpi_handle handle, const char *method, int val)
400 {
401         return write_acpi_int_ret(handle, method, val, NULL);
402 }
403 
404 static int acpi_check_handle(acpi_handle handle, const char *method,
405                              acpi_handle *ret)
406 {
407         acpi_status status;
408 
409         if (method == NULL)
410                 return -ENODEV;
411 
412         if (ret)
413                 status = acpi_get_handle(handle, (char *)method,
414                                          ret);
415         else {
416                 acpi_handle dummy;
417 
418                 status = acpi_get_handle(handle, (char *)method,
419                                          &dummy);
420         }
421 
422         if (status != AE_OK) {
423                 if (ret)
424                         pr_warn("Error finding %s\n", method);
425                 return -ENODEV;
426         }
427         return 0;
428 }
429 
430 static bool asus_check_pega_lucid(struct asus_laptop *asus)
431 {
432         return !strcmp(asus->name, DEVICE_NAME_PEGA) &&
433            !acpi_check_handle(asus->handle, METHOD_PEGA_ENABLE, NULL) &&
434            !acpi_check_handle(asus->handle, METHOD_PEGA_DISABLE, NULL) &&
435            !acpi_check_handle(asus->handle, METHOD_PEGA_READ, NULL);
436 }
437 
438 static int asus_pega_lucid_set(struct asus_laptop *asus, int unit, bool enable)
439 {
440         char *method = enable ? METHOD_PEGA_ENABLE : METHOD_PEGA_DISABLE;
441         return write_acpi_int(asus->handle, method, unit);
442 }
443 
444 static int pega_acc_axis(struct asus_laptop *asus, int curr, char *method)
445 {
446         int i, delta;
447         unsigned long long val;
448         for (i = 0; i < PEGA_ACC_RETRIES; i++) {
449                 acpi_evaluate_integer(asus->handle, method, NULL, &val);
450 
451                 /* The output is noisy.  From reading the ASL
452                  * dissassembly, timeout errors are returned with 1's
453                  * in the high word, and the lack of locking around
454                  * thei hi/lo byte reads means that a transition
455                  * between (for example) -1 and 0 could be read as
456                  * 0xff00 or 0x00ff. */
457                 delta = abs(curr - (short)val);
458                 if (delta < 128 && !(val & ~0xffff))
459                         break;
460         }
461         return clamp_val((short)val, -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP);
462 }
463 
464 static void pega_accel_poll(struct input_polled_dev *ipd)
465 {
466         struct device *parent = ipd->input->dev.parent;
467         struct asus_laptop *asus = dev_get_drvdata(parent);
468 
469         /* In some cases, the very first call to poll causes a
470          * recursive fault under the polldev worker.  This is
471          * apparently related to very early userspace access to the
472          * device, and perhaps a firmware bug. Fake the first report. */
473         if (!asus->pega_acc_live) {
474                 asus->pega_acc_live = true;
475                 input_report_abs(ipd->input, ABS_X, 0);
476                 input_report_abs(ipd->input, ABS_Y, 0);
477                 input_report_abs(ipd->input, ABS_Z, 0);
478                 input_sync(ipd->input);
479                 return;
480         }
481 
482         asus->pega_acc_x = pega_acc_axis(asus, asus->pega_acc_x, METHOD_XLRX);
483         asus->pega_acc_y = pega_acc_axis(asus, asus->pega_acc_y, METHOD_XLRY);
484         asus->pega_acc_z = pega_acc_axis(asus, asus->pega_acc_z, METHOD_XLRZ);
485 
486         /* Note transform, convert to "right/up/out" in the native
487          * landscape orientation (i.e. the vector is the direction of
488          * "real up" in the device's cartiesian coordinates). */
489         input_report_abs(ipd->input, ABS_X, -asus->pega_acc_x);
490         input_report_abs(ipd->input, ABS_Y, -asus->pega_acc_y);
491         input_report_abs(ipd->input, ABS_Z,  asus->pega_acc_z);
492         input_sync(ipd->input);
493 }
494 
495 static void pega_accel_exit(struct asus_laptop *asus)
496 {
497         if (asus->pega_accel_poll) {
498                 input_unregister_polled_device(asus->pega_accel_poll);
499                 input_free_polled_device(asus->pega_accel_poll);
500         }
501         asus->pega_accel_poll = NULL;
502 }
503 
504 static int pega_accel_init(struct asus_laptop *asus)
505 {
506         int err;
507         struct input_polled_dev *ipd;
508 
509         if (!asus->is_pega_lucid)
510                 return -ENODEV;
511 
512         if (acpi_check_handle(asus->handle, METHOD_XLRX, NULL) ||
513             acpi_check_handle(asus->handle, METHOD_XLRY, NULL) ||
514             acpi_check_handle(asus->handle, METHOD_XLRZ, NULL))
515                 return -ENODEV;
516 
517         ipd = input_allocate_polled_device();
518         if (!ipd)
519                 return -ENOMEM;
520 
521         ipd->poll = pega_accel_poll;
522         ipd->poll_interval = 125;
523         ipd->poll_interval_min = 50;
524         ipd->poll_interval_max = 2000;
525 
526         ipd->input->name = PEGA_ACCEL_DESC;
527         ipd->input->phys = PEGA_ACCEL_NAME "/input0";
528         ipd->input->dev.parent = &asus->platform_device->dev;
529         ipd->input->id.bustype = BUS_HOST;
530 
531         set_bit(EV_ABS, ipd->input->evbit);
532         input_set_abs_params(ipd->input, ABS_X,
533                              -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
534         input_set_abs_params(ipd->input, ABS_Y,
535                              -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
536         input_set_abs_params(ipd->input, ABS_Z,
537                              -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
538 
539         err = input_register_polled_device(ipd);
540         if (err)
541                 goto exit;
542 
543         asus->pega_accel_poll = ipd;
544         return 0;
545 
546 exit:
547         input_free_polled_device(ipd);
548         return err;
549 }
550 
551 /* Generic LED function */
552 static int asus_led_set(struct asus_laptop *asus, const char *method,
553                          int value)
554 {
555         if (!strcmp(method, METHOD_MLED))
556                 value = !value;
557         else if (!strcmp(method, METHOD_GLED))
558                 value = !value + 1;
559         else
560                 value = !!value;
561 
562         return write_acpi_int(asus->handle, method, value);
563 }
564 
565 /*
566  * LEDs
567  */
568 /* /sys/class/led handlers */
569 static void asus_led_cdev_set(struct led_classdev *led_cdev,
570                          enum led_brightness value)
571 {
572         struct asus_led *led = container_of(led_cdev, struct asus_led, led);
573         struct asus_laptop *asus = led->asus;
574 
575         led->wk = !!value;
576         queue_work(asus->led_workqueue, &led->work);
577 }
578 
579 static void asus_led_cdev_update(struct work_struct *work)
580 {
581         struct asus_led *led = container_of(work, struct asus_led, work);
582         struct asus_laptop *asus = led->asus;
583 
584         asus_led_set(asus, led->method, led->wk);
585 }
586 
587 static enum led_brightness asus_led_cdev_get(struct led_classdev *led_cdev)
588 {
589         return led_cdev->brightness;
590 }
591 
592 /*
593  * Keyboard backlight (also a LED)
594  */
595 static int asus_kled_lvl(struct asus_laptop *asus)
596 {
597         unsigned long long kblv;
598         struct acpi_object_list params;
599         union acpi_object in_obj;
600         acpi_status rv;
601 
602         params.count = 1;
603         params.pointer = &in_obj;
604         in_obj.type = ACPI_TYPE_INTEGER;
605         in_obj.integer.value = 2;
606 
607         rv = acpi_evaluate_integer(asus->handle, METHOD_KBD_LIGHT_GET,
608                                    &params, &kblv);
609         if (ACPI_FAILURE(rv)) {
610                 pr_warn("Error reading kled level\n");
611                 return -ENODEV;
612         }
613         return kblv;
614 }
615 
616 static int asus_kled_set(struct asus_laptop *asus, int kblv)
617 {
618         if (kblv > 0)
619                 kblv = (1 << 7) | (kblv & 0x7F);
620         else
621                 kblv = 0;
622 
623         if (write_acpi_int(asus->handle, METHOD_KBD_LIGHT_SET, kblv)) {
624                 pr_warn("Keyboard LED display write failed\n");
625                 return -EINVAL;
626         }
627         return 0;
628 }
629 
630 static void asus_kled_cdev_set(struct led_classdev *led_cdev,
631                               enum led_brightness value)
632 {
633         struct asus_led *led = container_of(led_cdev, struct asus_led, led);
634         struct asus_laptop *asus = led->asus;
635 
636         led->wk = value;
637         queue_work(asus->led_workqueue, &led->work);
638 }
639 
640 static void asus_kled_cdev_update(struct work_struct *work)
641 {
642         struct asus_led *led = container_of(work, struct asus_led, work);
643         struct asus_laptop *asus = led->asus;
644 
645         asus_kled_set(asus, led->wk);
646 }
647 
648 static enum led_brightness asus_kled_cdev_get(struct led_classdev *led_cdev)
649 {
650         struct asus_led *led = container_of(led_cdev, struct asus_led, led);
651         struct asus_laptop *asus = led->asus;
652 
653         return asus_kled_lvl(asus);
654 }
655 
656 static void asus_led_exit(struct asus_laptop *asus)
657 {
658         if (!IS_ERR_OR_NULL(asus->wled.led.dev))
659                 led_classdev_unregister(&asus->wled.led);
660         if (!IS_ERR_OR_NULL(asus->bled.led.dev))
661                 led_classdev_unregister(&asus->bled.led);
662         if (!IS_ERR_OR_NULL(asus->mled.led.dev))
663                 led_classdev_unregister(&asus->mled.led);
664         if (!IS_ERR_OR_NULL(asus->tled.led.dev))
665                 led_classdev_unregister(&asus->tled.led);
666         if (!IS_ERR_OR_NULL(asus->pled.led.dev))
667                 led_classdev_unregister(&asus->pled.led);
668         if (!IS_ERR_OR_NULL(asus->rled.led.dev))
669                 led_classdev_unregister(&asus->rled.led);
670         if (!IS_ERR_OR_NULL(asus->gled.led.dev))
671                 led_classdev_unregister(&asus->gled.led);
672         if (!IS_ERR_OR_NULL(asus->kled.led.dev))
673                 led_classdev_unregister(&asus->kled.led);
674         if (asus->led_workqueue) {
675                 destroy_workqueue(asus->led_workqueue);
676                 asus->led_workqueue = NULL;
677         }
678 }
679 
680 /*  Ugly macro, need to fix that later */
681 static int asus_led_register(struct asus_laptop *asus,
682                              struct asus_led *led,
683                              const char *name, const char *method)
684 {
685         struct led_classdev *led_cdev = &led->led;
686 
687         if (!method || acpi_check_handle(asus->handle, method, NULL))
688                 return 0; /* Led not present */
689 
690         led->asus = asus;
691         led->method = method;
692 
693         INIT_WORK(&led->work, asus_led_cdev_update);
694         led_cdev->name = name;
695         led_cdev->brightness_set = asus_led_cdev_set;
696         led_cdev->brightness_get = asus_led_cdev_get;
697         led_cdev->max_brightness = 1;
698         return led_classdev_register(&asus->platform_device->dev, led_cdev);
699 }
700 
701 static int asus_led_init(struct asus_laptop *asus)
702 {
703         int r = 0;
704 
705         /*
706          * The Pegatron Lucid has no physical leds, but all methods are
707          * available in the DSDT...
708          */
709         if (asus->is_pega_lucid)
710                 return 0;
711 
712         /*
713          * Functions that actually update the LED's are called from a
714          * workqueue. By doing this as separate work rather than when the LED
715          * subsystem asks, we avoid messing with the Asus ACPI stuff during a
716          * potentially bad time, such as a timer interrupt.
717          */
718         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
719         if (!asus->led_workqueue)
720                 return -ENOMEM;
721 
722         if (asus->wled_type == TYPE_LED)
723                 r = asus_led_register(asus, &asus->wled, "asus::wlan",
724                                       METHOD_WLAN);
725         if (r)
726                 goto error;
727         if (asus->bled_type == TYPE_LED)
728                 r = asus_led_register(asus, &asus->bled, "asus::bluetooth",
729                                       METHOD_BLUETOOTH);
730         if (r)
731                 goto error;
732         r = asus_led_register(asus, &asus->mled, "asus::mail", METHOD_MLED);
733         if (r)
734                 goto error;
735         r = asus_led_register(asus, &asus->tled, "asus::touchpad", METHOD_TLED);
736         if (r)
737                 goto error;
738         r = asus_led_register(asus, &asus->rled, "asus::record", METHOD_RLED);
739         if (r)
740                 goto error;
741         r = asus_led_register(asus, &asus->pled, "asus::phone", METHOD_PLED);
742         if (r)
743                 goto error;
744         r = asus_led_register(asus, &asus->gled, "asus::gaming", METHOD_GLED);
745         if (r)
746                 goto error;
747         if (!acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_SET, NULL) &&
748             !acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_GET, NULL)) {
749                 struct asus_led *led = &asus->kled;
750                 struct led_classdev *cdev = &led->led;
751 
752                 led->asus = asus;
753 
754                 INIT_WORK(&led->work, asus_kled_cdev_update);
755                 cdev->name = "asus::kbd_backlight";
756                 cdev->brightness_set = asus_kled_cdev_set;
757                 cdev->brightness_get = asus_kled_cdev_get;
758                 cdev->max_brightness = 3;
759                 r = led_classdev_register(&asus->platform_device->dev, cdev);
760         }
761 error:
762         if (r)
763                 asus_led_exit(asus);
764         return r;
765 }
766 
767 /*
768  * Backlight device
769  */
770 static int asus_read_brightness(struct backlight_device *bd)
771 {
772         struct asus_laptop *asus = bl_get_data(bd);
773         unsigned long long value;
774         acpi_status rv = AE_OK;
775 
776         rv = acpi_evaluate_integer(asus->handle, METHOD_BRIGHTNESS_GET,
777                                    NULL, &value);
778         if (ACPI_FAILURE(rv))
779                 pr_warn("Error reading brightness\n");
780 
781         return value;
782 }
783 
784 static int asus_set_brightness(struct backlight_device *bd, int value)
785 {
786         struct asus_laptop *asus = bl_get_data(bd);
787 
788         if (write_acpi_int(asus->handle, METHOD_BRIGHTNESS_SET, value)) {
789                 pr_warn("Error changing brightness\n");
790                 return -EIO;
791         }
792         return 0;
793 }
794 
795 static int update_bl_status(struct backlight_device *bd)
796 {
797         int value = bd->props.brightness;
798 
799         return asus_set_brightness(bd, value);
800 }
801 
802 static const struct backlight_ops asusbl_ops = {
803         .get_brightness = asus_read_brightness,
804         .update_status = update_bl_status,
805 };
806 
807 static int asus_backlight_notify(struct asus_laptop *asus)
808 {
809         struct backlight_device *bd = asus->backlight_device;
810         int old = bd->props.brightness;
811 
812         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
813 
814         return old;
815 }
816 
817 static int asus_backlight_init(struct asus_laptop *asus)
818 {
819         struct backlight_device *bd;
820         struct backlight_properties props;
821 
822         if (acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_GET, NULL) ||
823             acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_SET, NULL))
824                 return 0;
825 
826         memset(&props, 0, sizeof(struct backlight_properties));
827         props.max_brightness = 15;
828         props.type = BACKLIGHT_PLATFORM;
829 
830         bd = backlight_device_register(ASUS_LAPTOP_FILE,
831                                        &asus->platform_device->dev, asus,
832                                        &asusbl_ops, &props);
833         if (IS_ERR(bd)) {
834                 pr_err("Could not register asus backlight device\n");
835                 asus->backlight_device = NULL;
836                 return PTR_ERR(bd);
837         }
838 
839         asus->backlight_device = bd;
840         bd->props.brightness = asus_read_brightness(bd);
841         bd->props.power = FB_BLANK_UNBLANK;
842         backlight_update_status(bd);
843         return 0;
844 }
845 
846 static void asus_backlight_exit(struct asus_laptop *asus)
847 {
848         backlight_device_unregister(asus->backlight_device);
849         asus->backlight_device = NULL;
850 }
851 
852 /*
853  * Platform device handlers
854  */
855 
856 /*
857  * We write our info in page, we begin at offset off and cannot write more
858  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
859  * number of bytes written in page
860  */
861 static ssize_t infos_show(struct device *dev, struct device_attribute *attr,
862                           char *page)
863 {
864         struct asus_laptop *asus = dev_get_drvdata(dev);
865         int len = 0;
866         unsigned long long temp;
867         char buf[16];           /* enough for all info */
868         acpi_status rv = AE_OK;
869 
870         /*
871          * We use the easy way, we don't care of off and count,
872          * so we don't set eof to 1
873          */
874 
875         len += sprintf(page, ASUS_LAPTOP_NAME " " ASUS_LAPTOP_VERSION "\n");
876         len += sprintf(page + len, "Model reference    : %s\n", asus->name);
877         /*
878          * The SFUN method probably allows the original driver to get the list
879          * of features supported by a given model. For now, 0x0100 or 0x0800
880          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
881          * The significance of others is yet to be found.
882          */
883         rv = acpi_evaluate_integer(asus->handle, "SFUN", NULL, &temp);
884         if (!ACPI_FAILURE(rv))
885                 len += sprintf(page + len, "SFUN value         : %#x\n",
886                                (uint) temp);
887         /*
888          * The HWRS method return informations about the hardware.
889          * 0x80 bit is for WLAN, 0x100 for Bluetooth.
890          * 0x40 for WWAN, 0x10 for WIMAX.
891          * The significance of others is yet to be found.
892          * We don't currently use this for device detection, and it
893          * takes several seconds to run on some systems.
894          */
895         rv = acpi_evaluate_integer(asus->handle, "HWRS", NULL, &temp);
896         if (!ACPI_FAILURE(rv))
897                 len += sprintf(page + len, "HWRS value         : %#x\n",
898                                (uint) temp);
899         /*
900          * Another value for userspace: the ASYM method returns 0x02 for
901          * battery low and 0x04 for battery critical, its readings tend to be
902          * more accurate than those provided by _BST.
903          * Note: since not all the laptops provide this method, errors are
904          * silently ignored.
905          */
906         rv = acpi_evaluate_integer(asus->handle, "ASYM", NULL, &temp);
907         if (!ACPI_FAILURE(rv))
908                 len += sprintf(page + len, "ASYM value         : %#x\n",
909                                (uint) temp);
910         if (asus->dsdt_info) {
911                 snprintf(buf, 16, "%d", asus->dsdt_info->length);
912                 len += sprintf(page + len, "DSDT length        : %s\n", buf);
913                 snprintf(buf, 16, "%d", asus->dsdt_info->checksum);
914                 len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
915                 snprintf(buf, 16, "%d", asus->dsdt_info->revision);
916                 len += sprintf(page + len, "DSDT revision      : %s\n", buf);
917                 snprintf(buf, 7, "%s", asus->dsdt_info->oem_id);
918                 len += sprintf(page + len, "OEM id             : %s\n", buf);
919                 snprintf(buf, 9, "%s", asus->dsdt_info->oem_table_id);
920                 len += sprintf(page + len, "OEM table id       : %s\n", buf);
921                 snprintf(buf, 16, "%x", asus->dsdt_info->oem_revision);
922                 len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
923                 snprintf(buf, 5, "%s", asus->dsdt_info->asl_compiler_id);
924                 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
925                 snprintf(buf, 16, "%x", asus->dsdt_info->asl_compiler_revision);
926                 len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
927         }
928 
929         return len;
930 }
931 static DEVICE_ATTR_RO(infos);
932 
933 static int parse_arg(const char *buf, unsigned long count, int *val)
934 {
935         if (!count)
936                 return 0;
937         if (count > 31)
938                 return -EINVAL;
939         if (sscanf(buf, "%i", val) != 1)
940                 return -EINVAL;
941         return count;
942 }
943 
944 static ssize_t sysfs_acpi_set(struct asus_laptop *asus,
945                               const char *buf, size_t count,
946                               const char *method)
947 {
948         int rv, value;
949         int out = 0;
950 
951         rv = parse_arg(buf, count, &value);
952         if (rv > 0)
953                 out = value ? 1 : 0;
954 
955         if (write_acpi_int(asus->handle, method, value))
956                 return -ENODEV;
957         return rv;
958 }
959 
960 /*
961  * LEDD display
962  */
963 static ssize_t ledd_show(struct device *dev, struct device_attribute *attr,
964                          char *buf)
965 {
966         struct asus_laptop *asus = dev_get_drvdata(dev);
967 
968         return sprintf(buf, "0x%08x\n", asus->ledd_status);
969 }
970 
971 static ssize_t ledd_store(struct device *dev, struct device_attribute *attr,
972                           const char *buf, size_t count)
973 {
974         struct asus_laptop *asus = dev_get_drvdata(dev);
975         int rv, value;
976 
977         rv = parse_arg(buf, count, &value);
978         if (rv > 0) {
979                 if (write_acpi_int(asus->handle, METHOD_LEDD, value)) {
980                         pr_warn("LED display write failed\n");
981                         return -ENODEV;
982                 }
983                 asus->ledd_status = (u32) value;
984         }
985         return rv;
986 }
987 static DEVICE_ATTR_RW(ledd);
988 
989 /*
990  * Wireless
991  */
992 static int asus_wireless_status(struct asus_laptop *asus, int mask)
993 {
994         unsigned long long status;
995         acpi_status rv = AE_OK;
996 
997         if (!asus->have_rsts)
998                 return (asus->wireless_status & mask) ? 1 : 0;
999 
1000         rv = acpi_evaluate_integer(asus->handle, METHOD_WL_STATUS,
1001                                    NULL, &status);
1002         if (ACPI_FAILURE(rv)) {
1003                 pr_warn("Error reading Wireless status\n");
1004                 return -EINVAL;
1005         }
1006         return !!(status & mask);
1007 }
1008 
1009 /*
1010  * WLAN
1011  */
1012 static int asus_wlan_set(struct asus_laptop *asus, int status)
1013 {
1014         if (write_acpi_int(asus->handle, METHOD_WLAN, !!status)) {
1015                 pr_warn("Error setting wlan status to %d\n", status);
1016                 return -EIO;
1017         }
1018         return 0;
1019 }
1020 
1021 static ssize_t wlan_show(struct device *dev, struct device_attribute *attr,
1022                          char *buf)
1023 {
1024         struct asus_laptop *asus = dev_get_drvdata(dev);
1025 
1026         return sprintf(buf, "%d\n", asus_wireless_status(asus, WL_RSTS));
1027 }
1028 
1029 static ssize_t wlan_store(struct device *dev, struct device_attribute *attr,
1030                           const char *buf, size_t count)
1031 {
1032         struct asus_laptop *asus = dev_get_drvdata(dev);
1033 
1034         return sysfs_acpi_set(asus, buf, count, METHOD_WLAN);
1035 }
1036 static DEVICE_ATTR_RW(wlan);
1037 
1038 /*e
1039  * Bluetooth
1040  */
1041 static int asus_bluetooth_set(struct asus_laptop *asus, int status)
1042 {
1043         if (write_acpi_int(asus->handle, METHOD_BLUETOOTH, !!status)) {
1044                 pr_warn("Error setting bluetooth status to %d\n", status);
1045                 return -EIO;
1046         }
1047         return 0;
1048 }
1049 
1050 static ssize_t bluetooth_show(struct device *dev, struct device_attribute *attr,
1051                               char *buf)
1052 {
1053         struct asus_laptop *asus = dev_get_drvdata(dev);
1054 
1055         return sprintf(buf, "%d\n", asus_wireless_status(asus, BT_RSTS));
1056 }
1057 
1058 static ssize_t bluetooth_store(struct device *dev,
1059                                struct device_attribute *attr, const char *buf,
1060                                size_t count)
1061 {
1062         struct asus_laptop *asus = dev_get_drvdata(dev);
1063 
1064         return sysfs_acpi_set(asus, buf, count, METHOD_BLUETOOTH);
1065 }
1066 static DEVICE_ATTR_RW(bluetooth);
1067 
1068 /*
1069  * Wimax
1070  */
1071 static int asus_wimax_set(struct asus_laptop *asus, int status)
1072 {
1073         if (write_acpi_int(asus->handle, METHOD_WIMAX, !!status)) {
1074                 pr_warn("Error setting wimax status to %d\n", status);
1075                 return -EIO;
1076         }
1077         return 0;
1078 }
1079 
1080 static ssize_t wimax_show(struct device *dev, struct device_attribute *attr,
1081                           char *buf)
1082 {
1083         struct asus_laptop *asus = dev_get_drvdata(dev);
1084 
1085         return sprintf(buf, "%d\n", asus_wireless_status(asus, WM_RSTS));
1086 }
1087 
1088 static ssize_t wimax_store(struct device *dev, struct device_attribute *attr,
1089                            const char *buf, size_t count)
1090 {
1091         struct asus_laptop *asus = dev_get_drvdata(dev);
1092 
1093         return sysfs_acpi_set(asus, buf, count, METHOD_WIMAX);
1094 }
1095 static DEVICE_ATTR_RW(wimax);
1096 
1097 /*
1098  * Wwan
1099  */
1100 static int asus_wwan_set(struct asus_laptop *asus, int status)
1101 {
1102         if (write_acpi_int(asus->handle, METHOD_WWAN, !!status)) {
1103                 pr_warn("Error setting wwan status to %d\n", status);
1104                 return -EIO;
1105         }
1106         return 0;
1107 }
1108 
1109 static ssize_t wwan_show(struct device *dev, struct device_attribute *attr,
1110                          char *buf)
1111 {
1112         struct asus_laptop *asus = dev_get_drvdata(dev);
1113 
1114         return sprintf(buf, "%d\n", asus_wireless_status(asus, WW_RSTS));
1115 }
1116 
1117 static ssize_t wwan_store(struct device *dev, struct device_attribute *attr,
1118                           const char *buf, size_t count)
1119 {
1120         struct asus_laptop *asus = dev_get_drvdata(dev);
1121 
1122         return sysfs_acpi_set(asus, buf, count, METHOD_WWAN);
1123 }
1124 static DEVICE_ATTR_RW(wwan);
1125 
1126 /*
1127  * Display
1128  */
1129 static void asus_set_display(struct asus_laptop *asus, int value)
1130 {
1131         /* no sanity check needed for now */
1132         if (write_acpi_int(asus->handle, METHOD_SWITCH_DISPLAY, value))
1133                 pr_warn("Error setting display\n");
1134         return;
1135 }
1136 
1137 /*
1138  * Experimental support for display switching. As of now: 1 should activate
1139  * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
1140  * Any combination (bitwise) of these will suffice. I never actually tested 4
1141  * displays hooked up simultaneously, so be warned. See the acpi4asus README
1142  * for more info.
1143  */
1144 static ssize_t display_store(struct device *dev, struct device_attribute *attr,
1145                              const char *buf, size_t count)
1146 {
1147         struct asus_laptop *asus = dev_get_drvdata(dev);
1148         int rv, value;
1149 
1150         rv = parse_arg(buf, count, &value);
1151         if (rv > 0)
1152                 asus_set_display(asus, value);
1153         return rv;
1154 }
1155 static DEVICE_ATTR_WO(display);
1156 
1157 /*
1158  * Light Sens
1159  */
1160 static void asus_als_switch(struct asus_laptop *asus, int value)
1161 {
1162         int ret;
1163 
1164         if (asus->is_pega_lucid) {
1165                 ret = asus_pega_lucid_set(asus, PEGA_ALS, value);
1166                 if (!ret)
1167                         ret = asus_pega_lucid_set(asus, PEGA_ALS_POWER, value);
1168         } else {
1169                 ret = write_acpi_int(asus->handle, METHOD_ALS_CONTROL, value);
1170         }
1171         if (ret)
1172                 pr_warning("Error setting light sensor switch\n");
1173 
1174         asus->light_switch = value;
1175 }
1176 
1177 static ssize_t ls_switch_show(struct device *dev, struct device_attribute *attr,
1178                               char *buf)
1179 {
1180         struct asus_laptop *asus = dev_get_drvdata(dev);
1181 
1182         return sprintf(buf, "%d\n", asus->light_switch);
1183 }
1184 
1185 static ssize_t ls_switch_store(struct device *dev,
1186                                struct device_attribute *attr, const char *buf,
1187                                size_t count)
1188 {
1189         struct asus_laptop *asus = dev_get_drvdata(dev);
1190         int rv, value;
1191 
1192         rv = parse_arg(buf, count, &value);
1193         if (rv > 0)
1194                 asus_als_switch(asus, value ? 1 : 0);
1195 
1196         return rv;
1197 }
1198 static DEVICE_ATTR_RW(ls_switch);
1199 
1200 static void asus_als_level(struct asus_laptop *asus, int value)
1201 {
1202         if (write_acpi_int(asus->handle, METHOD_ALS_LEVEL, value))
1203                 pr_warn("Error setting light sensor level\n");
1204         asus->light_level = value;
1205 }
1206 
1207 static ssize_t ls_level_show(struct device *dev, struct device_attribute *attr,
1208                              char *buf)
1209 {
1210         struct asus_laptop *asus = dev_get_drvdata(dev);
1211 
1212         return sprintf(buf, "%d\n", asus->light_level);
1213 }
1214 
1215 static ssize_t ls_level_store(struct device *dev, struct device_attribute *attr,
1216                               const char *buf, size_t count)
1217 {
1218         struct asus_laptop *asus = dev_get_drvdata(dev);
1219         int rv, value;
1220 
1221         rv = parse_arg(buf, count, &value);
1222         if (rv > 0) {
1223                 value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
1224                 /* 0 <= value <= 15 */
1225                 asus_als_level(asus, value);
1226         }
1227 
1228         return rv;
1229 }
1230 static DEVICE_ATTR_RW(ls_level);
1231 
1232 static int pega_int_read(struct asus_laptop *asus, int arg, int *result)
1233 {
1234         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1235         int err = write_acpi_int_ret(asus->handle, METHOD_PEGA_READ, arg,
1236                                      &buffer);
1237         if (!err) {
1238                 union acpi_object *obj = buffer.pointer;
1239                 if (obj && obj->type == ACPI_TYPE_INTEGER)
1240                         *result = obj->integer.value;
1241                 else
1242                         err = -EIO;
1243         }
1244         return err;
1245 }
1246 
1247 static ssize_t ls_value_show(struct device *dev, struct device_attribute *attr,
1248                              char *buf)
1249 {
1250         struct asus_laptop *asus = dev_get_drvdata(dev);
1251         int err, hi, lo;
1252 
1253         err = pega_int_read(asus, PEGA_READ_ALS_H, &hi);
1254         if (!err)
1255                 err = pega_int_read(asus, PEGA_READ_ALS_L, &lo);
1256         if (!err)
1257                 return sprintf(buf, "%d\n", 10 * hi + lo);
1258         return err;
1259 }
1260 static DEVICE_ATTR_RO(ls_value);
1261 
1262 /*
1263  * GPS
1264  */
1265 static int asus_gps_status(struct asus_laptop *asus)
1266 {
1267         unsigned long long status;
1268         acpi_status rv = AE_OK;
1269 
1270         rv = acpi_evaluate_integer(asus->handle, METHOD_GPS_STATUS,
1271                                    NULL, &status);
1272         if (ACPI_FAILURE(rv)) {
1273                 pr_warn("Error reading GPS status\n");
1274                 return -ENODEV;
1275         }
1276         return !!status;
1277 }
1278 
1279 static int asus_gps_switch(struct asus_laptop *asus, int status)
1280 {
1281         const char *meth = status ? METHOD_GPS_ON : METHOD_GPS_OFF;
1282 
1283         if (write_acpi_int(asus->handle, meth, 0x02))
1284                 return -ENODEV;
1285         return 0;
1286 }
1287 
1288 static ssize_t gps_show(struct device *dev, struct device_attribute *attr,
1289                         char *buf)
1290 {
1291         struct asus_laptop *asus = dev_get_drvdata(dev);
1292 
1293         return sprintf(buf, "%d\n", asus_gps_status(asus));
1294 }
1295 
1296 static ssize_t gps_store(struct device *dev, struct device_attribute *attr,
1297                          const char *buf, size_t count)
1298 {
1299         struct asus_laptop *asus = dev_get_drvdata(dev);
1300         int rv, value;
1301         int ret;
1302 
1303         rv = parse_arg(buf, count, &value);
1304         if (rv <= 0)
1305                 return -EINVAL;
1306         ret = asus_gps_switch(asus, !!value);
1307         if (ret)
1308                 return ret;
1309         rfkill_set_sw_state(asus->gps.rfkill, !value);
1310         return rv;
1311 }
1312 static DEVICE_ATTR_RW(gps);
1313 
1314 /*
1315  * rfkill
1316  */
1317 static int asus_gps_rfkill_set(void *data, bool blocked)
1318 {
1319         struct asus_laptop *asus = data;
1320 
1321         return asus_gps_switch(asus, !blocked);
1322 }
1323 
1324 static const struct rfkill_ops asus_gps_rfkill_ops = {
1325         .set_block = asus_gps_rfkill_set,
1326 };
1327 
1328 static int asus_rfkill_set(void *data, bool blocked)
1329 {
1330         struct asus_rfkill *rfk = data;
1331         struct asus_laptop *asus = rfk->asus;
1332 
1333         if (rfk->control_id == WL_RSTS)
1334                 return asus_wlan_set(asus, !blocked);
1335         else if (rfk->control_id == BT_RSTS)
1336                 return asus_bluetooth_set(asus, !blocked);
1337         else if (rfk->control_id == WM_RSTS)
1338                 return asus_wimax_set(asus, !blocked);
1339         else if (rfk->control_id == WW_RSTS)
1340                 return asus_wwan_set(asus, !blocked);
1341 
1342         return -EINVAL;
1343 }
1344 
1345 static const struct rfkill_ops asus_rfkill_ops = {
1346         .set_block = asus_rfkill_set,
1347 };
1348 
1349 static void asus_rfkill_terminate(struct asus_rfkill *rfk)
1350 {
1351         if (!rfk->rfkill)
1352                 return ;
1353 
1354         rfkill_unregister(rfk->rfkill);
1355         rfkill_destroy(rfk->rfkill);
1356         rfk->rfkill = NULL;
1357 }
1358 
1359 static void asus_rfkill_exit(struct asus_laptop *asus)
1360 {
1361         asus_rfkill_terminate(&asus->wwan);
1362         asus_rfkill_terminate(&asus->bluetooth);
1363         asus_rfkill_terminate(&asus->wlan);
1364         asus_rfkill_terminate(&asus->gps);
1365 }
1366 
1367 static int asus_rfkill_setup(struct asus_laptop *asus, struct asus_rfkill *rfk,
1368                              const char *name, int control_id, int type,
1369                              const struct rfkill_ops *ops)
1370 {
1371         int result;
1372 
1373         rfk->control_id = control_id;
1374         rfk->asus = asus;
1375         rfk->rfkill = rfkill_alloc(name, &asus->platform_device->dev,
1376                                    type, ops, rfk);
1377         if (!rfk->rfkill)
1378                 return -EINVAL;
1379 
1380         result = rfkill_register(rfk->rfkill);
1381         if (result) {
1382                 rfkill_destroy(rfk->rfkill);
1383                 rfk->rfkill = NULL;
1384         }
1385 
1386         return result;
1387 }
1388 
1389 static int asus_rfkill_init(struct asus_laptop *asus)
1390 {
1391         int result = 0;
1392 
1393         if (asus->is_pega_lucid)
1394                 return -ENODEV;
1395 
1396         if (!acpi_check_handle(asus->handle, METHOD_GPS_ON, NULL) &&
1397             !acpi_check_handle(asus->handle, METHOD_GPS_OFF, NULL) &&
1398             !acpi_check_handle(asus->handle, METHOD_GPS_STATUS, NULL))
1399                 result = asus_rfkill_setup(asus, &asus->gps, "asus-gps",
1400                                            -1, RFKILL_TYPE_GPS,
1401                                            &asus_gps_rfkill_ops);
1402         if (result)
1403                 goto exit;
1404 
1405 
1406         if (!acpi_check_handle(asus->handle, METHOD_WLAN, NULL) &&
1407             asus->wled_type == TYPE_RFKILL)
1408                 result = asus_rfkill_setup(asus, &asus->wlan, "asus-wlan",
1409                                            WL_RSTS, RFKILL_TYPE_WLAN,
1410                                            &asus_rfkill_ops);
1411         if (result)
1412                 goto exit;
1413 
1414         if (!acpi_check_handle(asus->handle, METHOD_BLUETOOTH, NULL) &&
1415             asus->bled_type == TYPE_RFKILL)
1416                 result = asus_rfkill_setup(asus, &asus->bluetooth,
1417                                            "asus-bluetooth", BT_RSTS,
1418                                            RFKILL_TYPE_BLUETOOTH,
1419                                            &asus_rfkill_ops);
1420         if (result)
1421                 goto exit;
1422 
1423         if (!acpi_check_handle(asus->handle, METHOD_WWAN, NULL))
1424                 result = asus_rfkill_setup(asus, &asus->wwan, "asus-wwan",
1425                                            WW_RSTS, RFKILL_TYPE_WWAN,
1426                                            &asus_rfkill_ops);
1427         if (result)
1428                 goto exit;
1429 
1430         if (!acpi_check_handle(asus->handle, METHOD_WIMAX, NULL))
1431                 result = asus_rfkill_setup(asus, &asus->wimax, "asus-wimax",
1432                                            WM_RSTS, RFKILL_TYPE_WIMAX,
1433                                            &asus_rfkill_ops);
1434         if (result)
1435                 goto exit;
1436 
1437 exit:
1438         if (result)
1439                 asus_rfkill_exit(asus);
1440 
1441         return result;
1442 }
1443 
1444 static int pega_rfkill_set(void *data, bool blocked)
1445 {
1446         struct asus_rfkill *rfk = data;
1447 
1448         int ret = asus_pega_lucid_set(rfk->asus, rfk->control_id, !blocked);
1449         return ret;
1450 }
1451 
1452 static const struct rfkill_ops pega_rfkill_ops = {
1453         .set_block = pega_rfkill_set,
1454 };
1455 
1456 static int pega_rfkill_setup(struct asus_laptop *asus, struct asus_rfkill *rfk,
1457                              const char *name, int controlid, int rfkill_type)
1458 {
1459         return asus_rfkill_setup(asus, rfk, name, controlid, rfkill_type,
1460                                  &pega_rfkill_ops);
1461 }
1462 
1463 static int pega_rfkill_init(struct asus_laptop *asus)
1464 {
1465         int ret = 0;
1466 
1467         if(!asus->is_pega_lucid)
1468                 return -ENODEV;
1469 
1470         ret = pega_rfkill_setup(asus, &asus->wlan, "pega-wlan",
1471                                 PEGA_WLAN, RFKILL_TYPE_WLAN);
1472         if(ret)
1473                 goto exit;
1474 
1475         ret = pega_rfkill_setup(asus, &asus->bluetooth, "pega-bt",
1476                                 PEGA_BLUETOOTH, RFKILL_TYPE_BLUETOOTH);
1477         if(ret)
1478                 goto exit;
1479 
1480         ret = pega_rfkill_setup(asus, &asus->wwan, "pega-wwan",
1481                                 PEGA_WWAN, RFKILL_TYPE_WWAN);
1482 
1483 exit:
1484         if (ret)
1485                 asus_rfkill_exit(asus);
1486 
1487         return ret;
1488 }
1489 
1490 /*
1491  * Input device (i.e. hotkeys)
1492  */
1493 static void asus_input_notify(struct asus_laptop *asus, int event)
1494 {
1495         if (!asus->inputdev)
1496                 return ;
1497         if (!sparse_keymap_report_event(asus->inputdev, event, 1, true))
1498                 pr_info("Unknown key %x pressed\n", event);
1499 }
1500 
1501 static int asus_input_init(struct asus_laptop *asus)
1502 {
1503         struct input_dev *input;
1504         int error;
1505 
1506         input = input_allocate_device();
1507         if (!input)
1508                 return -ENOMEM;
1509 
1510         input->name = "Asus Laptop extra buttons";
1511         input->phys = ASUS_LAPTOP_FILE "/input0";
1512         input->id.bustype = BUS_HOST;
1513         input->dev.parent = &asus->platform_device->dev;
1514 
1515         error = sparse_keymap_setup(input, asus_keymap, NULL);
1516         if (error) {
1517                 pr_err("Unable to setup input device keymap\n");
1518                 goto err_free_dev;
1519         }
1520         error = input_register_device(input);
1521         if (error) {
1522                 pr_warn("Unable to register input device\n");
1523                 goto err_free_keymap;
1524         }
1525 
1526         asus->inputdev = input;
1527         return 0;
1528 
1529 err_free_keymap:
1530         sparse_keymap_free(input);
1531 err_free_dev:
1532         input_free_device(input);
1533         return error;
1534 }
1535 
1536 static void asus_input_exit(struct asus_laptop *asus)
1537 {
1538         if (asus->inputdev) {
1539                 sparse_keymap_free(asus->inputdev);
1540                 input_unregister_device(asus->inputdev);
1541         }
1542         asus->inputdev = NULL;
1543 }
1544 
1545 /*
1546  * ACPI driver
1547  */
1548 static void asus_acpi_notify(struct acpi_device *device, u32 event)
1549 {
1550         struct asus_laptop *asus = acpi_driver_data(device);
1551         u16 count;
1552 
1553         /* TODO Find a better way to handle events count. */
1554         count = asus->event_count[event % 128]++;
1555         acpi_bus_generate_netlink_event(asus->device->pnp.device_class,
1556                                         dev_name(&asus->device->dev), event,
1557                                         count);
1558 
1559         if (event >= ATKD_BRNUP_MIN && event <= ATKD_BRNUP_MAX)
1560                 event = ATKD_BRNUP;
1561         else if (event >= ATKD_BRNDOWN_MIN &&
1562                  event <= ATKD_BRNDOWN_MAX)
1563                 event = ATKD_BRNDOWN;
1564 
1565         /* Brightness events are special */
1566         if (event == ATKD_BRNDOWN || event == ATKD_BRNUP) {
1567                 if (asus->backlight_device != NULL) {
1568                         /* Update the backlight device. */
1569                         asus_backlight_notify(asus);
1570                         return ;
1571                 }
1572         }
1573 
1574         /* Accelerometer "coarse orientation change" event */
1575         if (asus->pega_accel_poll && event == 0xEA) {
1576                 kobject_uevent(&asus->pega_accel_poll->input->dev.kobj,
1577                                KOBJ_CHANGE);
1578                 return ;
1579         }
1580 
1581         asus_input_notify(asus, event);
1582 }
1583 
1584 static struct attribute *asus_attributes[] = {
1585         &dev_attr_infos.attr,
1586         &dev_attr_wlan.attr,
1587         &dev_attr_bluetooth.attr,
1588         &dev_attr_wimax.attr,
1589         &dev_attr_wwan.attr,
1590         &dev_attr_display.attr,
1591         &dev_attr_ledd.attr,
1592         &dev_attr_ls_value.attr,
1593         &dev_attr_ls_level.attr,
1594         &dev_attr_ls_switch.attr,
1595         &dev_attr_gps.attr,
1596         NULL
1597 };
1598 
1599 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1600                                     struct attribute *attr,
1601                                     int idx)
1602 {
1603         struct device *dev = container_of(kobj, struct device, kobj);
1604         struct platform_device *pdev = to_platform_device(dev);
1605         struct asus_laptop *asus = platform_get_drvdata(pdev);
1606         acpi_handle handle = asus->handle;
1607         bool supported;
1608 
1609         if (asus->is_pega_lucid) {
1610                 /* no ls_level interface on the Lucid */
1611                 if (attr == &dev_attr_ls_switch.attr)
1612                         supported = true;
1613                 else if (attr == &dev_attr_ls_level.attr)
1614                         supported = false;
1615                 else
1616                         goto normal;
1617 
1618                 return supported ? attr->mode : 0;
1619         }
1620 
1621 normal:
1622         if (attr == &dev_attr_wlan.attr) {
1623                 supported = !acpi_check_handle(handle, METHOD_WLAN, NULL);
1624 
1625         } else if (attr == &dev_attr_bluetooth.attr) {
1626                 supported = !acpi_check_handle(handle, METHOD_BLUETOOTH, NULL);
1627 
1628         } else if (attr == &dev_attr_display.attr) {
1629                 supported = !acpi_check_handle(handle, METHOD_SWITCH_DISPLAY, NULL);
1630 
1631         } else if (attr == &dev_attr_wimax.attr) {
1632                 supported =
1633                         !acpi_check_handle(asus->handle, METHOD_WIMAX, NULL);
1634 
1635         } else if (attr == &dev_attr_wwan.attr) {
1636                 supported = !acpi_check_handle(asus->handle, METHOD_WWAN, NULL);
1637 
1638         } else if (attr == &dev_attr_ledd.attr) {
1639                 supported = !acpi_check_handle(handle, METHOD_LEDD, NULL);
1640 
1641         } else if (attr == &dev_attr_ls_switch.attr ||
1642                    attr == &dev_attr_ls_level.attr) {
1643                 supported = !acpi_check_handle(handle, METHOD_ALS_CONTROL, NULL) &&
1644                         !acpi_check_handle(handle, METHOD_ALS_LEVEL, NULL);
1645         } else if (attr == &dev_attr_ls_value.attr) {
1646                 supported = asus->is_pega_lucid;
1647         } else if (attr == &dev_attr_gps.attr) {
1648                 supported = !acpi_check_handle(handle, METHOD_GPS_ON, NULL) &&
1649                             !acpi_check_handle(handle, METHOD_GPS_OFF, NULL) &&
1650                             !acpi_check_handle(handle, METHOD_GPS_STATUS, NULL);
1651         } else {
1652                 supported = true;
1653         }
1654 
1655         return supported ? attr->mode : 0;
1656 }
1657 
1658 
1659 static const struct attribute_group asus_attr_group = {
1660         .is_visible     = asus_sysfs_is_visible,
1661         .attrs          = asus_attributes,
1662 };
1663 
1664 static int asus_platform_init(struct asus_laptop *asus)
1665 {
1666         int result;
1667 
1668         asus->platform_device = platform_device_alloc(ASUS_LAPTOP_FILE, -1);
1669         if (!asus->platform_device)
1670                 return -ENOMEM;
1671         platform_set_drvdata(asus->platform_device, asus);
1672 
1673         result = platform_device_add(asus->platform_device);
1674         if (result)
1675                 goto fail_platform_device;
1676 
1677         result = sysfs_create_group(&asus->platform_device->dev.kobj,
1678                                     &asus_attr_group);
1679         if (result)
1680                 goto fail_sysfs;
1681 
1682         return 0;
1683 
1684 fail_sysfs:
1685         platform_device_del(asus->platform_device);
1686 fail_platform_device:
1687         platform_device_put(asus->platform_device);
1688         return result;
1689 }
1690 
1691 static void asus_platform_exit(struct asus_laptop *asus)
1692 {
1693         sysfs_remove_group(&asus->platform_device->dev.kobj, &asus_attr_group);
1694         platform_device_unregister(asus->platform_device);
1695 }
1696 
1697 static struct platform_driver platform_driver = {
1698         .driver = {
1699                 .name = ASUS_LAPTOP_FILE,
1700         },
1701 };
1702 
1703 /*
1704  * This function is used to initialize the context with right values. In this
1705  * method, we can make all the detection we want, and modify the asus_laptop
1706  * struct
1707  */
1708 static int asus_laptop_get_info(struct asus_laptop *asus)
1709 {
1710         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1711         union acpi_object *model = NULL;
1712         unsigned long long bsts_result;
1713         char *string = NULL;
1714         acpi_status status;
1715 
1716         /*
1717          * Get DSDT headers early enough to allow for differentiating between
1718          * models, but late enough to allow acpi_bus_register_driver() to fail
1719          * before doing anything ACPI-specific. Should we encounter a machine,
1720          * which needs special handling (i.e. its hotkey device has a different
1721          * HID), this bit will be moved.
1722          */
1723         status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus->dsdt_info);
1724         if (ACPI_FAILURE(status))
1725                 pr_warn("Couldn't get the DSDT table header\n");
1726 
1727         /* We have to write 0 on init this far for all ASUS models */
1728         if (write_acpi_int_ret(asus->handle, "INIT", 0, &buffer)) {
1729                 pr_err("Hotkey initialization failed\n");
1730                 return -ENODEV;
1731         }
1732 
1733         /* This needs to be called for some laptops to init properly */
1734         status =
1735             acpi_evaluate_integer(asus->handle, "BSTS", NULL, &bsts_result);
1736         if (ACPI_FAILURE(status))
1737                 pr_warn("Error calling BSTS\n");
1738         else if (bsts_result)
1739                 pr_notice("BSTS called, 0x%02x returned\n",
1740                        (uint) bsts_result);
1741 
1742         /* This too ... */
1743         if (write_acpi_int(asus->handle, "CWAP", wapf))
1744                 pr_err("Error calling CWAP(%d)\n", wapf);
1745         /*
1746          * Try to match the object returned by INIT to the specific model.
1747          * Handle every possible object (or the lack of thereof) the DSDT
1748          * writers might throw at us. When in trouble, we pass NULL to
1749          * asus_model_match() and try something completely different.
1750          */
1751         if (buffer.pointer) {
1752                 model = buffer.pointer;
1753                 switch (model->type) {
1754                 case ACPI_TYPE_STRING:
1755                         string = model->string.pointer;
1756                         break;
1757                 case ACPI_TYPE_BUFFER:
1758                         string = model->buffer.pointer;
1759                         break;
1760                 default:
1761                         string = "";
1762                         break;
1763                 }
1764         }
1765         asus->name = kstrdup(string, GFP_KERNEL);
1766         if (!asus->name) {
1767                 kfree(buffer.pointer);
1768                 return -ENOMEM;
1769         }
1770 
1771         if (string)
1772                 pr_notice("  %s model detected\n", string);
1773 
1774         if (!acpi_check_handle(asus->handle, METHOD_WL_STATUS, NULL))
1775                 asus->have_rsts = true;
1776 
1777         kfree(model);
1778 
1779         return AE_OK;
1780 }
1781 
1782 static int asus_acpi_init(struct asus_laptop *asus)
1783 {
1784         int result = 0;
1785 
1786         result = acpi_bus_get_status(asus->device);
1787         if (result)
1788                 return result;
1789         if (!asus->device->status.present) {
1790                 pr_err("Hotkey device not present, aborting\n");
1791                 return -ENODEV;
1792         }
1793 
1794         result = asus_laptop_get_info(asus);
1795         if (result)
1796                 return result;
1797 
1798         if (!strcmp(bled_type, "led"))
1799                 asus->bled_type = TYPE_LED;
1800         else if (!strcmp(bled_type, "rfkill"))
1801                 asus->bled_type = TYPE_RFKILL;
1802 
1803         if (!strcmp(wled_type, "led"))
1804                 asus->wled_type = TYPE_LED;
1805         else if (!strcmp(wled_type, "rfkill"))
1806                 asus->wled_type = TYPE_RFKILL;
1807 
1808         if (bluetooth_status >= 0)
1809                 asus_bluetooth_set(asus, !!bluetooth_status);
1810 
1811         if (wlan_status >= 0)
1812                 asus_wlan_set(asus, !!wlan_status);
1813 
1814         if (wimax_status >= 0)
1815                 asus_wimax_set(asus, !!wimax_status);
1816 
1817         if (wwan_status >= 0)
1818                 asus_wwan_set(asus, !!wwan_status);
1819 
1820         /* Keyboard Backlight is on by default */
1821         if (!acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_SET, NULL))
1822                 asus_kled_set(asus, 1);
1823 
1824         /* LED display is off by default */
1825         asus->ledd_status = 0xFFF;
1826 
1827         /* Set initial values of light sensor and level */
1828         asus->light_switch = !!als_status;
1829         asus->light_level = 5;  /* level 5 for sensor sensitivity */
1830 
1831         if (asus->is_pega_lucid) {
1832                 asus_als_switch(asus, asus->light_switch);
1833         } else if (!acpi_check_handle(asus->handle, METHOD_ALS_CONTROL, NULL) &&
1834                    !acpi_check_handle(asus->handle, METHOD_ALS_LEVEL, NULL)) {
1835                 asus_als_switch(asus, asus->light_switch);
1836                 asus_als_level(asus, asus->light_level);
1837         }
1838 
1839         return result;
1840 }
1841 
1842 static void asus_dmi_check(void)
1843 {
1844         const char *model;
1845 
1846         model = dmi_get_system_info(DMI_PRODUCT_NAME);
1847         if (!model)
1848                 return;
1849 
1850         /* On L1400B WLED control the sound card, don't mess with it ... */
1851         if (strncmp(model, "L1400B", 6) == 0) {
1852                 wlan_status = -1;
1853         }
1854 }
1855 
1856 static bool asus_device_present;
1857 
1858 static int asus_acpi_add(struct acpi_device *device)
1859 {
1860         struct asus_laptop *asus;
1861         int result;
1862 
1863         pr_notice("Asus Laptop Support version %s\n",
1864                   ASUS_LAPTOP_VERSION);
1865         asus = kzalloc(sizeof(struct asus_laptop), GFP_KERNEL);
1866         if (!asus)
1867                 return -ENOMEM;
1868         asus->handle = device->handle;
1869         strcpy(acpi_device_name(device), ASUS_LAPTOP_DEVICE_NAME);
1870         strcpy(acpi_device_class(device), ASUS_LAPTOP_CLASS);
1871         device->driver_data = asus;
1872         asus->device = device;
1873 
1874         asus_dmi_check();
1875 
1876         result = asus_acpi_init(asus);
1877         if (result)
1878                 goto fail_platform;
1879 
1880         /*
1881          * Need platform type detection first, then the platform
1882          * device.  It is used as a parent for the sub-devices below.
1883          */
1884         asus->is_pega_lucid = asus_check_pega_lucid(asus);
1885         result = asus_platform_init(asus);
1886         if (result)
1887                 goto fail_platform;
1888 
1889         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1890                 result = asus_backlight_init(asus);
1891                 if (result)
1892                         goto fail_backlight;
1893         }
1894 
1895         result = asus_input_init(asus);
1896         if (result)
1897                 goto fail_input;
1898 
1899         result = asus_led_init(asus);
1900         if (result)
1901                 goto fail_led;
1902 
1903         result = asus_rfkill_init(asus);
1904         if (result && result != -ENODEV)
1905                 goto fail_rfkill;
1906 
1907         result = pega_accel_init(asus);
1908         if (result && result != -ENODEV)
1909                 goto fail_pega_accel;
1910 
1911         result = pega_rfkill_init(asus);
1912         if (result && result != -ENODEV)
1913                 goto fail_pega_rfkill;
1914 
1915         asus_device_present = true;
1916         return 0;
1917 
1918 fail_pega_rfkill:
1919         pega_accel_exit(asus);
1920 fail_pega_accel:
1921         asus_rfkill_exit(asus);
1922 fail_rfkill:
1923         asus_led_exit(asus);
1924 fail_led:
1925         asus_input_exit(asus);
1926 fail_input:
1927         asus_backlight_exit(asus);
1928 fail_backlight:
1929         asus_platform_exit(asus);
1930 fail_platform:
1931         kfree(asus);
1932 
1933         return result;
1934 }
1935 
1936 static int asus_acpi_remove(struct acpi_device *device)
1937 {
1938         struct asus_laptop *asus = acpi_driver_data(device);
1939 
1940         asus_backlight_exit(asus);
1941         asus_rfkill_exit(asus);
1942         asus_led_exit(asus);
1943         asus_input_exit(asus);
1944         pega_accel_exit(asus);
1945         asus_platform_exit(asus);
1946 
1947         kfree(asus->name);
1948         kfree(asus);
1949         return 0;
1950 }
1951 
1952 static const struct acpi_device_id asus_device_ids[] = {
1953         {"ATK0100", 0},
1954         {"ATK0101", 0},
1955         {"", 0},
1956 };
1957 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
1958 
1959 static struct acpi_driver asus_acpi_driver = {
1960         .name = ASUS_LAPTOP_NAME,
1961         .class = ASUS_LAPTOP_CLASS,
1962         .owner = THIS_MODULE,
1963         .ids = asus_device_ids,
1964         .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1965         .ops = {
1966                 .add = asus_acpi_add,
1967                 .remove = asus_acpi_remove,
1968                 .notify = asus_acpi_notify,
1969                 },
1970 };
1971 
1972 static int __init asus_laptop_init(void)
1973 {
1974         int result;
1975 
1976         result = platform_driver_register(&platform_driver);
1977         if (result < 0)
1978                 return result;
1979 
1980         result = acpi_bus_register_driver(&asus_acpi_driver);
1981         if (result < 0)
1982                 goto fail_acpi_driver;
1983         if (!asus_device_present) {
1984                 result = -ENODEV;
1985                 goto fail_no_device;
1986         }
1987         return 0;
1988 
1989 fail_no_device:
1990         acpi_bus_unregister_driver(&asus_acpi_driver);
1991 fail_acpi_driver:
1992         platform_driver_unregister(&platform_driver);
1993         return result;
1994 }
1995 
1996 static void __exit asus_laptop_exit(void)
1997 {
1998         acpi_bus_unregister_driver(&asus_acpi_driver);
1999         platform_driver_unregister(&platform_driver);
2000 }
2001 
2002 module_init(asus_laptop_init);
2003 module_exit(asus_laptop_exit);
2004 

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