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

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