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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  asus-laptop.c - Asus Laptop Support
0004  *
0005  *  Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
0006  *  Copyright (C) 2006-2007 Corentin Chary
0007  *  Copyright (C) 2011 Wind River Systems
0008  *
0009  *  The development page for this driver is located at
0010  *  http://sourceforge.net/projects/acpi4asus/
0011  *
0012  *  Credits:
0013  *  Pontus Fuchs   - Helper functions, cleanup
0014  *  Johann Wiesner - Small compile fixes
0015  *  John Belmonte  - ACPI code for Toshiba laptop was a good starting point.
0016  *  Eric Burghard  - LED display support for W1N
0017  *  Josh Green     - Light Sens support
0018  *  Thomas Tuttle  - His first patch for led support was very helpful
0019  *  Sam Lin        - GPS support
0020  */
0021 
0022 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0023 
0024 #include <linux/kernel.h>
0025 #include <linux/module.h>
0026 #include <linux/init.h>
0027 #include <linux/types.h>
0028 #include <linux/err.h>
0029 #include <linux/proc_fs.h>
0030 #include <linux/backlight.h>
0031 #include <linux/fb.h>
0032 #include <linux/leds.h>
0033 #include <linux/platform_device.h>
0034 #include <linux/uaccess.h>
0035 #include <linux/input.h>
0036 #include <linux/input/sparse-keymap.h>
0037 #include <linux/rfkill.h>
0038 #include <linux/slab.h>
0039 #include <linux/dmi.h>
0040 #include <linux/acpi.h>
0041 #include <acpi/video.h>
0042 
0043 #define ASUS_LAPTOP_VERSION "0.42"
0044 
0045 #define ASUS_LAPTOP_NAME    "Asus Laptop Support"
0046 #define ASUS_LAPTOP_CLASS   "hotkey"
0047 #define ASUS_LAPTOP_DEVICE_NAME "Hotkey"
0048 #define ASUS_LAPTOP_FILE    KBUILD_MODNAME
0049 #define ASUS_LAPTOP_PREFIX  "\\_SB.ATKD."
0050 
0051 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
0052 MODULE_DESCRIPTION(ASUS_LAPTOP_NAME);
0053 MODULE_LICENSE("GPL");
0054 
0055 /*
0056  * WAPF defines the behavior of the Fn+Fx wlan key
0057  * The significance of values is yet to be found, but
0058  * most of the time:
0059  * Bit | Bluetooth | WLAN
0060  *  0  | Hardware  | Hardware
0061  *  1  | Hardware  | Software
0062  *  4  | Software  | Software
0063  */
0064 static uint wapf = 1;
0065 module_param(wapf, uint, 0444);
0066 MODULE_PARM_DESC(wapf, "WAPF value");
0067 
0068 static char *wled_type = "unknown";
0069 static char *bled_type = "unknown";
0070 
0071 module_param(wled_type, charp, 0444);
0072 MODULE_PARM_DESC(wled_type, "Set the wled type on boot "
0073          "(unknown, led or rfkill). "
0074          "default is unknown");
0075 
0076 module_param(bled_type, charp, 0444);
0077 MODULE_PARM_DESC(bled_type, "Set the bled type on boot "
0078          "(unknown, led or rfkill). "
0079          "default is unknown");
0080 
0081 static int wlan_status = 1;
0082 static int bluetooth_status = 1;
0083 static int wimax_status = -1;
0084 static int wwan_status = -1;
0085 static int als_status;
0086 
0087 module_param(wlan_status, int, 0444);
0088 MODULE_PARM_DESC(wlan_status, "Set the wireless status on boot "
0089          "(0 = disabled, 1 = enabled, -1 = don't do anything). "
0090          "default is -1");
0091 
0092 module_param(bluetooth_status, int, 0444);
0093 MODULE_PARM_DESC(bluetooth_status, "Set the wireless status on boot "
0094          "(0 = disabled, 1 = enabled, -1 = don't do anything). "
0095          "default is -1");
0096 
0097 module_param(wimax_status, int, 0444);
0098 MODULE_PARM_DESC(wimax_status, "Set the wireless status on boot "
0099          "(0 = disabled, 1 = enabled, -1 = don't do anything). "
0100          "default is -1");
0101 
0102 module_param(wwan_status, int, 0444);
0103 MODULE_PARM_DESC(wwan_status, "Set the wireless status on boot "
0104          "(0 = disabled, 1 = enabled, -1 = don't do anything). "
0105          "default is -1");
0106 
0107 module_param(als_status, int, 0444);
0108 MODULE_PARM_DESC(als_status, "Set the ALS status on boot "
0109          "(0 = disabled, 1 = enabled). "
0110          "default is 0");
0111 
0112 /*
0113  * Some events we use, same for all Asus
0114  */
0115 #define ATKD_BRNUP_MIN      0x10
0116 #define ATKD_BRNUP_MAX      0x1f
0117 #define ATKD_BRNDOWN_MIN    0x20
0118 #define ATKD_BRNDOWN_MAX    0x2f
0119 #define ATKD_BRNDOWN        0x20
0120 #define ATKD_BRNUP      0x2f
0121 #define ATKD_LCD_ON 0x33
0122 #define ATKD_LCD_OFF    0x34
0123 
0124 /*
0125  * Known bits returned by \_SB.ATKD.HWRS
0126  */
0127 #define WL_HWRS     0x80
0128 #define BT_HWRS     0x100
0129 
0130 /*
0131  * Flags for hotk status
0132  * WL_ON and BT_ON are also used for wireless_status()
0133  */
0134 #define WL_RSTS     0x01    /* internal Wifi */
0135 #define BT_RSTS     0x02    /* internal Bluetooth */
0136 #define WM_RSTS     0x08    /* internal wimax */
0137 #define WW_RSTS     0x20    /* internal wwan */
0138 
0139 /* WLED and BLED type */
0140 #define TYPE_UNKNOWN    0
0141 #define TYPE_LED    1
0142 #define TYPE_RFKILL 2
0143 
0144 /* LED */
0145 #define METHOD_MLED     "MLED"
0146 #define METHOD_TLED     "TLED"
0147 #define METHOD_RLED     "RLED"  /* W1JC */
0148 #define METHOD_PLED     "PLED"  /* A7J */
0149 #define METHOD_GLED     "GLED"  /* G1, G2 (probably) */
0150 
0151 /* LEDD */
0152 #define METHOD_LEDD     "SLCM"
0153 
0154 /*
0155  * Bluetooth and WLAN
0156  * WLED and BLED are not handled like other XLED, because in some dsdt
0157  * they also control the WLAN/Bluetooth device.
0158  */
0159 #define METHOD_WLAN     "WLED"
0160 #define METHOD_BLUETOOTH    "BLED"
0161 
0162 /* WWAN and WIMAX */
0163 #define METHOD_WWAN     "GSMC"
0164 #define METHOD_WIMAX        "WMXC"
0165 
0166 #define METHOD_WL_STATUS    "RSTS"
0167 
0168 /* Brightness */
0169 #define METHOD_BRIGHTNESS_SET   "SPLV"
0170 #define METHOD_BRIGHTNESS_GET   "GPLV"
0171 
0172 /* Display */
0173 #define METHOD_SWITCH_DISPLAY   "SDSP"
0174 
0175 #define METHOD_ALS_CONTROL  "ALSC" /* Z71A Z71V */
0176 #define METHOD_ALS_LEVEL    "ALSL" /* Z71A Z71V */
0177 
0178 /* GPS */
0179 /* R2H use different handle for GPS on/off */
0180 #define METHOD_GPS_ON       "SDON"
0181 #define METHOD_GPS_OFF      "SDOF"
0182 #define METHOD_GPS_STATUS   "GPST"
0183 
0184 /* Keyboard light */
0185 #define METHOD_KBD_LIGHT_SET    "SLKB"
0186 #define METHOD_KBD_LIGHT_GET    "GLKB"
0187 
0188 /* For Pegatron Lucid tablet */
0189 #define DEVICE_NAME_PEGA    "Lucid"
0190 
0191 #define METHOD_PEGA_ENABLE  "ENPR"
0192 #define METHOD_PEGA_DISABLE "DAPR"
0193 #define PEGA_WLAN   0x00
0194 #define PEGA_BLUETOOTH  0x01
0195 #define PEGA_WWAN   0x02
0196 #define PEGA_ALS    0x04
0197 #define PEGA_ALS_POWER  0x05
0198 
0199 #define METHOD_PEGA_READ    "RDLN"
0200 #define PEGA_READ_ALS_H 0x02
0201 #define PEGA_READ_ALS_L 0x03
0202 
0203 #define PEGA_ACCEL_NAME "pega_accel"
0204 #define PEGA_ACCEL_DESC "Pegatron Lucid Tablet Accelerometer"
0205 #define METHOD_XLRX "XLRX"
0206 #define METHOD_XLRY "XLRY"
0207 #define METHOD_XLRZ "XLRZ"
0208 #define PEGA_ACC_CLAMP 512 /* 1G accel is reported as ~256, so clamp to 2G */
0209 #define PEGA_ACC_RETRIES 3
0210 
0211 /*
0212  * Define a specific led structure to keep the main structure clean
0213  */
0214 struct asus_led {
0215     int wk;
0216     struct work_struct work;
0217     struct led_classdev led;
0218     struct asus_laptop *asus;
0219     const char *method;
0220 };
0221 
0222 /*
0223  * Same thing for rfkill
0224  */
0225 struct asus_rfkill {
0226     /* type of control. Maps to PEGA_* values or *_RSTS  */
0227     int control_id;
0228     struct rfkill *rfkill;
0229     struct asus_laptop *asus;
0230 };
0231 
0232 /*
0233  * This is the main structure, we can use it to store anything interesting
0234  * about the hotk device
0235  */
0236 struct asus_laptop {
0237     char *name;     /* laptop name */
0238 
0239     struct acpi_table_header *dsdt_info;
0240     struct platform_device *platform_device;
0241     struct acpi_device *device;     /* the device we are in */
0242     struct backlight_device *backlight_device;
0243 
0244     struct input_dev *inputdev;
0245     struct key_entry *keymap;
0246     struct input_dev *pega_accel_poll;
0247 
0248     struct asus_led wled;
0249     struct asus_led bled;
0250     struct asus_led mled;
0251     struct asus_led tled;
0252     struct asus_led rled;
0253     struct asus_led pled;
0254     struct asus_led gled;
0255     struct asus_led kled;
0256     struct workqueue_struct *led_workqueue;
0257 
0258     int wled_type;
0259     int bled_type;
0260     int wireless_status;
0261     bool have_rsts;
0262     bool is_pega_lucid;
0263     bool pega_acc_live;
0264     int pega_acc_x;
0265     int pega_acc_y;
0266     int pega_acc_z;
0267 
0268     struct asus_rfkill wlan;
0269     struct asus_rfkill bluetooth;
0270     struct asus_rfkill wwan;
0271     struct asus_rfkill wimax;
0272     struct asus_rfkill gps;
0273 
0274     acpi_handle handle; /* the handle of the hotk device */
0275     u32 ledd_status;    /* status of the LED display */
0276     u8 light_level;     /* light sensor level */
0277     u8 light_switch;    /* light sensor switch value */
0278     u16 event_count[128];   /* count for each event TODO make this better */
0279 };
0280 
0281 static const struct key_entry asus_keymap[] = {
0282     /* Lenovo SL Specific keycodes */
0283     {KE_KEY, 0x02, { KEY_SCREENLOCK } },
0284     {KE_KEY, 0x05, { KEY_WLAN } },
0285     {KE_KEY, 0x08, { KEY_F13 } },
0286     {KE_KEY, 0x09, { KEY_PROG2 } }, /* Dock */
0287     {KE_KEY, 0x17, { KEY_ZOOM } },
0288     {KE_KEY, 0x1f, { KEY_BATTERY } },
0289     /* End of Lenovo SL Specific keycodes */
0290     {KE_KEY, ATKD_BRNDOWN, { KEY_BRIGHTNESSDOWN } },
0291     {KE_KEY, ATKD_BRNUP, { KEY_BRIGHTNESSUP } },
0292     {KE_KEY, 0x30, { KEY_VOLUMEUP } },
0293     {KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
0294     {KE_KEY, 0x32, { KEY_MUTE } },
0295     {KE_KEY, 0x33, { KEY_DISPLAYTOGGLE } }, /* LCD on */
0296     {KE_KEY, 0x34, { KEY_DISPLAY_OFF } }, /* LCD off */
0297     {KE_KEY, 0x40, { KEY_PREVIOUSSONG } },
0298     {KE_KEY, 0x41, { KEY_NEXTSONG } },
0299     {KE_KEY, 0x43, { KEY_STOPCD } }, /* Stop/Eject */
0300     {KE_KEY, 0x45, { KEY_PLAYPAUSE } },
0301     {KE_KEY, 0x4c, { KEY_MEDIA } }, /* WMP Key */
0302     {KE_KEY, 0x50, { KEY_EMAIL } },
0303     {KE_KEY, 0x51, { KEY_WWW } },
0304     {KE_KEY, 0x55, { KEY_CALC } },
0305     {KE_IGNORE, 0x57, },  /* Battery mode */
0306     {KE_IGNORE, 0x58, },  /* AC mode */
0307     {KE_KEY, 0x5C, { KEY_SCREENLOCK } },  /* Screenlock */
0308     {KE_KEY, 0x5D, { KEY_WLAN } }, /* WLAN Toggle */
0309     {KE_KEY, 0x5E, { KEY_WLAN } }, /* WLAN Enable */
0310     {KE_KEY, 0x5F, { KEY_WLAN } }, /* WLAN Disable */
0311     {KE_KEY, 0x60, { KEY_TOUCHPAD_ON } },
0312     {KE_KEY, 0x61, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD only */
0313     {KE_KEY, 0x62, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT only */
0314     {KE_KEY, 0x63, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT */
0315     {KE_KEY, 0x64, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV */
0316     {KE_KEY, 0x65, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV */
0317     {KE_KEY, 0x66, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV */
0318     {KE_KEY, 0x67, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV */
0319     {KE_KEY, 0x6A, { KEY_TOUCHPAD_TOGGLE } }, /* Lock Touchpad Fn + F9 */
0320     {KE_KEY, 0x6B, { KEY_TOUCHPAD_TOGGLE } }, /* Lock Touchpad */
0321     {KE_KEY, 0x6C, { KEY_SLEEP } }, /* Suspend */
0322     {KE_KEY, 0x6D, { KEY_SLEEP } }, /* Hibernate */
0323     {KE_IGNORE, 0x6E, },  /* Low Battery notification */
0324     {KE_KEY, 0x7D, { KEY_BLUETOOTH } }, /* Bluetooth Enable */
0325     {KE_KEY, 0x7E, { KEY_BLUETOOTH } }, /* Bluetooth Disable */
0326     {KE_KEY, 0x82, { KEY_CAMERA } },
0327     {KE_KEY, 0x88, { KEY_RFKILL  } }, /* Radio Toggle Key */
0328     {KE_KEY, 0x8A, { KEY_PROG1 } }, /* Color enhancement mode */
0329     {KE_KEY, 0x8C, { KEY_SWITCHVIDEOMODE } }, /* SDSP DVI only */
0330     {KE_KEY, 0x8D, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + DVI */
0331     {KE_KEY, 0x8E, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + DVI */
0332     {KE_KEY, 0x8F, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + DVI */
0333     {KE_KEY, 0x90, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + DVI */
0334     {KE_KEY, 0x91, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + DVI */
0335     {KE_KEY, 0x92, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + DVI */
0336     {KE_KEY, 0x93, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + DVI */
0337     {KE_KEY, 0x95, { KEY_MEDIA } },
0338     {KE_KEY, 0x99, { KEY_PHONE } },
0339     {KE_KEY, 0xA0, { KEY_SWITCHVIDEOMODE } }, /* SDSP HDMI only */
0340     {KE_KEY, 0xA1, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + HDMI */
0341     {KE_KEY, 0xA2, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + HDMI */
0342     {KE_KEY, 0xA3, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + HDMI */
0343     {KE_KEY, 0xA4, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + HDMI */
0344     {KE_KEY, 0xA5, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + HDMI */
0345     {KE_KEY, 0xA6, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + HDMI */
0346     {KE_KEY, 0xA7, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + HDMI */
0347     {KE_KEY, 0xB5, { KEY_CALC } },
0348     {KE_KEY, 0xC4, { KEY_KBDILLUMUP } },
0349     {KE_KEY, 0xC5, { KEY_KBDILLUMDOWN } },
0350     {KE_END, 0},
0351 };
0352 
0353 
0354 /*
0355  * This function evaluates an ACPI method, given an int as parameter, the
0356  * method is searched within the scope of the handle, can be NULL. The output
0357  * of the method is written is output, which can also be NULL
0358  *
0359  * returns 0 if write is successful, -1 else.
0360  */
0361 static int write_acpi_int_ret(acpi_handle handle, const char *method, int val,
0362                   struct acpi_buffer *output)
0363 {
0364     struct acpi_object_list params; /* list of input parameters (an int) */
0365     union acpi_object in_obj;   /* the only param we use */
0366     acpi_status status;
0367 
0368     if (!handle)
0369         return -1;
0370 
0371     params.count = 1;
0372     params.pointer = &in_obj;
0373     in_obj.type = ACPI_TYPE_INTEGER;
0374     in_obj.integer.value = val;
0375 
0376     status = acpi_evaluate_object(handle, (char *)method, &params, output);
0377     if (status == AE_OK)
0378         return 0;
0379     else
0380         return -1;
0381 }
0382 
0383 static int write_acpi_int(acpi_handle handle, const char *method, int val)
0384 {
0385     return write_acpi_int_ret(handle, method, val, NULL);
0386 }
0387 
0388 static int acpi_check_handle(acpi_handle handle, const char *method,
0389                  acpi_handle *ret)
0390 {
0391     acpi_status status;
0392 
0393     if (method == NULL)
0394         return -ENODEV;
0395 
0396     if (ret)
0397         status = acpi_get_handle(handle, (char *)method,
0398                      ret);
0399     else {
0400         acpi_handle dummy;
0401 
0402         status = acpi_get_handle(handle, (char *)method,
0403                      &dummy);
0404     }
0405 
0406     if (status != AE_OK) {
0407         if (ret)
0408             pr_warn("Error finding %s\n", method);
0409         return -ENODEV;
0410     }
0411     return 0;
0412 }
0413 
0414 static bool asus_check_pega_lucid(struct asus_laptop *asus)
0415 {
0416     return !strcmp(asus->name, DEVICE_NAME_PEGA) &&
0417        !acpi_check_handle(asus->handle, METHOD_PEGA_ENABLE, NULL) &&
0418        !acpi_check_handle(asus->handle, METHOD_PEGA_DISABLE, NULL) &&
0419        !acpi_check_handle(asus->handle, METHOD_PEGA_READ, NULL);
0420 }
0421 
0422 static int asus_pega_lucid_set(struct asus_laptop *asus, int unit, bool enable)
0423 {
0424     char *method = enable ? METHOD_PEGA_ENABLE : METHOD_PEGA_DISABLE;
0425     return write_acpi_int(asus->handle, method, unit);
0426 }
0427 
0428 static int pega_acc_axis(struct asus_laptop *asus, int curr, char *method)
0429 {
0430     int i, delta;
0431     unsigned long long val;
0432     for (i = 0; i < PEGA_ACC_RETRIES; i++) {
0433         acpi_evaluate_integer(asus->handle, method, NULL, &val);
0434 
0435         /* The output is noisy.  From reading the ASL
0436          * dissassembly, timeout errors are returned with 1's
0437          * in the high word, and the lack of locking around
0438          * thei hi/lo byte reads means that a transition
0439          * between (for example) -1 and 0 could be read as
0440          * 0xff00 or 0x00ff. */
0441         delta = abs(curr - (short)val);
0442         if (delta < 128 && !(val & ~0xffff))
0443             break;
0444     }
0445     return clamp_val((short)val, -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP);
0446 }
0447 
0448 static void pega_accel_poll(struct input_dev *input)
0449 {
0450     struct device *parent = input->dev.parent;
0451     struct asus_laptop *asus = dev_get_drvdata(parent);
0452 
0453     /* In some cases, the very first call to poll causes a
0454      * recursive fault under the polldev worker.  This is
0455      * apparently related to very early userspace access to the
0456      * device, and perhaps a firmware bug. Fake the first report. */
0457     if (!asus->pega_acc_live) {
0458         asus->pega_acc_live = true;
0459         input_report_abs(input, ABS_X, 0);
0460         input_report_abs(input, ABS_Y, 0);
0461         input_report_abs(input, ABS_Z, 0);
0462         input_sync(input);
0463         return;
0464     }
0465 
0466     asus->pega_acc_x = pega_acc_axis(asus, asus->pega_acc_x, METHOD_XLRX);
0467     asus->pega_acc_y = pega_acc_axis(asus, asus->pega_acc_y, METHOD_XLRY);
0468     asus->pega_acc_z = pega_acc_axis(asus, asus->pega_acc_z, METHOD_XLRZ);
0469 
0470     /* Note transform, convert to "right/up/out" in the native
0471      * landscape orientation (i.e. the vector is the direction of
0472      * "real up" in the device's cartiesian coordinates). */
0473     input_report_abs(input, ABS_X, -asus->pega_acc_x);
0474     input_report_abs(input, ABS_Y, -asus->pega_acc_y);
0475     input_report_abs(input, ABS_Z,  asus->pega_acc_z);
0476     input_sync(input);
0477 }
0478 
0479 static void pega_accel_exit(struct asus_laptop *asus)
0480 {
0481     if (asus->pega_accel_poll) {
0482         input_unregister_device(asus->pega_accel_poll);
0483         asus->pega_accel_poll = NULL;
0484     }
0485 }
0486 
0487 static int pega_accel_init(struct asus_laptop *asus)
0488 {
0489     int err;
0490     struct input_dev *input;
0491 
0492     if (!asus->is_pega_lucid)
0493         return -ENODEV;
0494 
0495     if (acpi_check_handle(asus->handle, METHOD_XLRX, NULL) ||
0496         acpi_check_handle(asus->handle, METHOD_XLRY, NULL) ||
0497         acpi_check_handle(asus->handle, METHOD_XLRZ, NULL))
0498         return -ENODEV;
0499 
0500     input = input_allocate_device();
0501     if (!input)
0502         return -ENOMEM;
0503 
0504     input->name = PEGA_ACCEL_DESC;
0505     input->phys = PEGA_ACCEL_NAME "/input0";
0506     input->dev.parent = &asus->platform_device->dev;
0507     input->id.bustype = BUS_HOST;
0508 
0509     input_set_abs_params(input, ABS_X,
0510                  -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
0511     input_set_abs_params(input, ABS_Y,
0512                  -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
0513     input_set_abs_params(input, ABS_Z,
0514                  -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
0515 
0516     err = input_setup_polling(input, pega_accel_poll);
0517     if (err)
0518         goto exit;
0519 
0520     input_set_poll_interval(input, 125);
0521     input_set_min_poll_interval(input, 50);
0522     input_set_max_poll_interval(input, 2000);
0523 
0524     err = input_register_device(input);
0525     if (err)
0526         goto exit;
0527 
0528     asus->pega_accel_poll = input;
0529     return 0;
0530 
0531 exit:
0532     input_free_device(input);
0533     return err;
0534 }
0535 
0536 /* Generic LED function */
0537 static int asus_led_set(struct asus_laptop *asus, const char *method,
0538              int value)
0539 {
0540     if (!strcmp(method, METHOD_MLED))
0541         value = !value;
0542     else if (!strcmp(method, METHOD_GLED))
0543         value = !value + 1;
0544     else
0545         value = !!value;
0546 
0547     return write_acpi_int(asus->handle, method, value);
0548 }
0549 
0550 /*
0551  * LEDs
0552  */
0553 /* /sys/class/led handlers */
0554 static void asus_led_cdev_set(struct led_classdev *led_cdev,
0555              enum led_brightness value)
0556 {
0557     struct asus_led *led = container_of(led_cdev, struct asus_led, led);
0558     struct asus_laptop *asus = led->asus;
0559 
0560     led->wk = !!value;
0561     queue_work(asus->led_workqueue, &led->work);
0562 }
0563 
0564 static void asus_led_cdev_update(struct work_struct *work)
0565 {
0566     struct asus_led *led = container_of(work, struct asus_led, work);
0567     struct asus_laptop *asus = led->asus;
0568 
0569     asus_led_set(asus, led->method, led->wk);
0570 }
0571 
0572 static enum led_brightness asus_led_cdev_get(struct led_classdev *led_cdev)
0573 {
0574     return led_cdev->brightness;
0575 }
0576 
0577 /*
0578  * Keyboard backlight (also a LED)
0579  */
0580 static int asus_kled_lvl(struct asus_laptop *asus)
0581 {
0582     unsigned long long kblv;
0583     struct acpi_object_list params;
0584     union acpi_object in_obj;
0585     acpi_status rv;
0586 
0587     params.count = 1;
0588     params.pointer = &in_obj;
0589     in_obj.type = ACPI_TYPE_INTEGER;
0590     in_obj.integer.value = 2;
0591 
0592     rv = acpi_evaluate_integer(asus->handle, METHOD_KBD_LIGHT_GET,
0593                    &params, &kblv);
0594     if (ACPI_FAILURE(rv)) {
0595         pr_warn("Error reading kled level\n");
0596         return -ENODEV;
0597     }
0598     return kblv;
0599 }
0600 
0601 static int asus_kled_set(struct asus_laptop *asus, int kblv)
0602 {
0603     if (kblv > 0)
0604         kblv = (1 << 7) | (kblv & 0x7F);
0605     else
0606         kblv = 0;
0607 
0608     if (write_acpi_int(asus->handle, METHOD_KBD_LIGHT_SET, kblv)) {
0609         pr_warn("Keyboard LED display write failed\n");
0610         return -EINVAL;
0611     }
0612     return 0;
0613 }
0614 
0615 static void asus_kled_cdev_set(struct led_classdev *led_cdev,
0616                   enum led_brightness value)
0617 {
0618     struct asus_led *led = container_of(led_cdev, struct asus_led, led);
0619     struct asus_laptop *asus = led->asus;
0620 
0621     led->wk = value;
0622     queue_work(asus->led_workqueue, &led->work);
0623 }
0624 
0625 static void asus_kled_cdev_update(struct work_struct *work)
0626 {
0627     struct asus_led *led = container_of(work, struct asus_led, work);
0628     struct asus_laptop *asus = led->asus;
0629 
0630     asus_kled_set(asus, led->wk);
0631 }
0632 
0633 static enum led_brightness asus_kled_cdev_get(struct led_classdev *led_cdev)
0634 {
0635     struct asus_led *led = container_of(led_cdev, struct asus_led, led);
0636     struct asus_laptop *asus = led->asus;
0637 
0638     return asus_kled_lvl(asus);
0639 }
0640 
0641 static void asus_led_exit(struct asus_laptop *asus)
0642 {
0643     led_classdev_unregister(&asus->wled.led);
0644     led_classdev_unregister(&asus->bled.led);
0645     led_classdev_unregister(&asus->mled.led);
0646     led_classdev_unregister(&asus->tled.led);
0647     led_classdev_unregister(&asus->pled.led);
0648     led_classdev_unregister(&asus->rled.led);
0649     led_classdev_unregister(&asus->gled.led);
0650     led_classdev_unregister(&asus->kled.led);
0651 
0652     if (asus->led_workqueue) {
0653         destroy_workqueue(asus->led_workqueue);
0654         asus->led_workqueue = NULL;
0655     }
0656 }
0657 
0658 /*  Ugly macro, need to fix that later */
0659 static int asus_led_register(struct asus_laptop *asus,
0660                  struct asus_led *led,
0661                  const char *name, const char *method)
0662 {
0663     struct led_classdev *led_cdev = &led->led;
0664 
0665     if (!method || acpi_check_handle(asus->handle, method, NULL))
0666         return 0; /* Led not present */
0667 
0668     led->asus = asus;
0669     led->method = method;
0670 
0671     INIT_WORK(&led->work, asus_led_cdev_update);
0672     led_cdev->name = name;
0673     led_cdev->brightness_set = asus_led_cdev_set;
0674     led_cdev->brightness_get = asus_led_cdev_get;
0675     led_cdev->max_brightness = 1;
0676     return led_classdev_register(&asus->platform_device->dev, led_cdev);
0677 }
0678 
0679 static int asus_led_init(struct asus_laptop *asus)
0680 {
0681     int r = 0;
0682 
0683     /*
0684      * The Pegatron Lucid has no physical leds, but all methods are
0685      * available in the DSDT...
0686      */
0687     if (asus->is_pega_lucid)
0688         return 0;
0689 
0690     /*
0691      * Functions that actually update the LED's are called from a
0692      * workqueue. By doing this as separate work rather than when the LED
0693      * subsystem asks, we avoid messing with the Asus ACPI stuff during a
0694      * potentially bad time, such as a timer interrupt.
0695      */
0696     asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
0697     if (!asus->led_workqueue)
0698         return -ENOMEM;
0699 
0700     if (asus->wled_type == TYPE_LED)
0701         r = asus_led_register(asus, &asus->wled, "asus::wlan",
0702                       METHOD_WLAN);
0703     if (r)
0704         goto error;
0705     if (asus->bled_type == TYPE_LED)
0706         r = asus_led_register(asus, &asus->bled, "asus::bluetooth",
0707                       METHOD_BLUETOOTH);
0708     if (r)
0709         goto error;
0710     r = asus_led_register(asus, &asus->mled, "asus::mail", METHOD_MLED);
0711     if (r)
0712         goto error;
0713     r = asus_led_register(asus, &asus->tled, "asus::touchpad", METHOD_TLED);
0714     if (r)
0715         goto error;
0716     r = asus_led_register(asus, &asus->rled, "asus::record", METHOD_RLED);
0717     if (r)
0718         goto error;
0719     r = asus_led_register(asus, &asus->pled, "asus::phone", METHOD_PLED);
0720     if (r)
0721         goto error;
0722     r = asus_led_register(asus, &asus->gled, "asus::gaming", METHOD_GLED);
0723     if (r)
0724         goto error;
0725     if (!acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_SET, NULL) &&
0726         !acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_GET, NULL)) {
0727         struct asus_led *led = &asus->kled;
0728         struct led_classdev *cdev = &led->led;
0729 
0730         led->asus = asus;
0731 
0732         INIT_WORK(&led->work, asus_kled_cdev_update);
0733         cdev->name = "asus::kbd_backlight";
0734         cdev->brightness_set = asus_kled_cdev_set;
0735         cdev->brightness_get = asus_kled_cdev_get;
0736         cdev->max_brightness = 3;
0737         r = led_classdev_register(&asus->platform_device->dev, cdev);
0738     }
0739 error:
0740     if (r)
0741         asus_led_exit(asus);
0742     return r;
0743 }
0744 
0745 /*
0746  * Backlight device
0747  */
0748 static int asus_read_brightness(struct backlight_device *bd)
0749 {
0750     struct asus_laptop *asus = bl_get_data(bd);
0751     unsigned long long value;
0752     acpi_status rv;
0753 
0754     rv = acpi_evaluate_integer(asus->handle, METHOD_BRIGHTNESS_GET,
0755                    NULL, &value);
0756     if (ACPI_FAILURE(rv)) {
0757         pr_warn("Error reading brightness\n");
0758         return 0;
0759     }
0760 
0761     return value;
0762 }
0763 
0764 static int asus_set_brightness(struct backlight_device *bd, int value)
0765 {
0766     struct asus_laptop *asus = bl_get_data(bd);
0767 
0768     if (write_acpi_int(asus->handle, METHOD_BRIGHTNESS_SET, value)) {
0769         pr_warn("Error changing brightness\n");
0770         return -EIO;
0771     }
0772     return 0;
0773 }
0774 
0775 static int update_bl_status(struct backlight_device *bd)
0776 {
0777     int value = bd->props.brightness;
0778 
0779     return asus_set_brightness(bd, value);
0780 }
0781 
0782 static const struct backlight_ops asusbl_ops = {
0783     .get_brightness = asus_read_brightness,
0784     .update_status = update_bl_status,
0785 };
0786 
0787 static int asus_backlight_notify(struct asus_laptop *asus)
0788 {
0789     struct backlight_device *bd = asus->backlight_device;
0790     int old = bd->props.brightness;
0791 
0792     backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
0793 
0794     return old;
0795 }
0796 
0797 static int asus_backlight_init(struct asus_laptop *asus)
0798 {
0799     struct backlight_device *bd;
0800     struct backlight_properties props;
0801 
0802     if (acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_GET, NULL) ||
0803         acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_SET, NULL))
0804         return 0;
0805 
0806     memset(&props, 0, sizeof(struct backlight_properties));
0807     props.max_brightness = 15;
0808     props.type = BACKLIGHT_PLATFORM;
0809 
0810     bd = backlight_device_register(ASUS_LAPTOP_FILE,
0811                        &asus->platform_device->dev, asus,
0812                        &asusbl_ops, &props);
0813     if (IS_ERR(bd)) {
0814         pr_err("Could not register asus backlight device\n");
0815         asus->backlight_device = NULL;
0816         return PTR_ERR(bd);
0817     }
0818 
0819     asus->backlight_device = bd;
0820     bd->props.brightness = asus_read_brightness(bd);
0821     bd->props.power = FB_BLANK_UNBLANK;
0822     backlight_update_status(bd);
0823     return 0;
0824 }
0825 
0826 static void asus_backlight_exit(struct asus_laptop *asus)
0827 {
0828     backlight_device_unregister(asus->backlight_device);
0829     asus->backlight_device = NULL;
0830 }
0831 
0832 /*
0833  * Platform device handlers
0834  */
0835 
0836 /*
0837  * We write our info in page, we begin at offset off and cannot write more
0838  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
0839  * number of bytes written in page
0840  */
0841 static ssize_t infos_show(struct device *dev, struct device_attribute *attr,
0842               char *page)
0843 {
0844     struct asus_laptop *asus = dev_get_drvdata(dev);
0845     int len = 0;
0846     unsigned long long temp;
0847     char buf[16];       /* enough for all info */
0848     acpi_status rv;
0849 
0850     /*
0851      * We use the easy way, we don't care of off and count,
0852      * so we don't set eof to 1
0853      */
0854 
0855     len += sprintf(page, ASUS_LAPTOP_NAME " " ASUS_LAPTOP_VERSION "\n");
0856     len += sprintf(page + len, "Model reference    : %s\n", asus->name);
0857     /*
0858      * The SFUN method probably allows the original driver to get the list
0859      * of features supported by a given model. For now, 0x0100 or 0x0800
0860      * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
0861      * The significance of others is yet to be found.
0862      */
0863     rv = acpi_evaluate_integer(asus->handle, "SFUN", NULL, &temp);
0864     if (ACPI_SUCCESS(rv))
0865         len += sprintf(page + len, "SFUN value         : %#x\n",
0866                    (uint) temp);
0867     /*
0868      * The HWRS method return informations about the hardware.
0869      * 0x80 bit is for WLAN, 0x100 for Bluetooth.
0870      * 0x40 for WWAN, 0x10 for WIMAX.
0871      * The significance of others is yet to be found.
0872      * We don't currently use this for device detection, and it
0873      * takes several seconds to run on some systems.
0874      */
0875     rv = acpi_evaluate_integer(asus->handle, "HWRS", NULL, &temp);
0876     if (ACPI_SUCCESS(rv))
0877         len += sprintf(page + len, "HWRS value         : %#x\n",
0878                    (uint) temp);
0879     /*
0880      * Another value for userspace: the ASYM method returns 0x02 for
0881      * battery low and 0x04 for battery critical, its readings tend to be
0882      * more accurate than those provided by _BST.
0883      * Note: since not all the laptops provide this method, errors are
0884      * silently ignored.
0885      */
0886     rv = acpi_evaluate_integer(asus->handle, "ASYM", NULL, &temp);
0887     if (ACPI_SUCCESS(rv))
0888         len += sprintf(page + len, "ASYM value         : %#x\n",
0889                    (uint) temp);
0890     if (asus->dsdt_info) {
0891         snprintf(buf, 16, "%d", asus->dsdt_info->length);
0892         len += sprintf(page + len, "DSDT length        : %s\n", buf);
0893         snprintf(buf, 16, "%d", asus->dsdt_info->checksum);
0894         len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
0895         snprintf(buf, 16, "%d", asus->dsdt_info->revision);
0896         len += sprintf(page + len, "DSDT revision      : %s\n", buf);
0897         snprintf(buf, 7, "%s", asus->dsdt_info->oem_id);
0898         len += sprintf(page + len, "OEM id             : %s\n", buf);
0899         snprintf(buf, 9, "%s", asus->dsdt_info->oem_table_id);
0900         len += sprintf(page + len, "OEM table id       : %s\n", buf);
0901         snprintf(buf, 16, "%x", asus->dsdt_info->oem_revision);
0902         len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
0903         snprintf(buf, 5, "%s", asus->dsdt_info->asl_compiler_id);
0904         len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
0905         snprintf(buf, 16, "%x", asus->dsdt_info->asl_compiler_revision);
0906         len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
0907     }
0908 
0909     return len;
0910 }
0911 static DEVICE_ATTR_RO(infos);
0912 
0913 static ssize_t sysfs_acpi_set(struct asus_laptop *asus,
0914                   const char *buf, size_t count,
0915                   const char *method)
0916 {
0917     int rv, value;
0918 
0919     rv = kstrtoint(buf, 0, &value);
0920     if (rv < 0)
0921         return rv;
0922 
0923     if (write_acpi_int(asus->handle, method, value))
0924         return -ENODEV;
0925     return count;
0926 }
0927 
0928 /*
0929  * LEDD display
0930  */
0931 static ssize_t ledd_show(struct device *dev, struct device_attribute *attr,
0932              char *buf)
0933 {
0934     struct asus_laptop *asus = dev_get_drvdata(dev);
0935 
0936     return sprintf(buf, "0x%08x\n", asus->ledd_status);
0937 }
0938 
0939 static ssize_t ledd_store(struct device *dev, struct device_attribute *attr,
0940               const char *buf, size_t count)
0941 {
0942     struct asus_laptop *asus = dev_get_drvdata(dev);
0943     int rv, value;
0944 
0945     rv = kstrtoint(buf, 0, &value);
0946     if (rv < 0)
0947         return rv;
0948 
0949     if (write_acpi_int(asus->handle, METHOD_LEDD, value)) {
0950         pr_warn("LED display write failed\n");
0951         return -ENODEV;
0952     }
0953 
0954     asus->ledd_status = (u32) value;
0955     return count;
0956 }
0957 static DEVICE_ATTR_RW(ledd);
0958 
0959 /*
0960  * Wireless
0961  */
0962 static int asus_wireless_status(struct asus_laptop *asus, int mask)
0963 {
0964     unsigned long long status;
0965     acpi_status rv = AE_OK;
0966 
0967     if (!asus->have_rsts)
0968         return (asus->wireless_status & mask) ? 1 : 0;
0969 
0970     rv = acpi_evaluate_integer(asus->handle, METHOD_WL_STATUS,
0971                    NULL, &status);
0972     if (ACPI_FAILURE(rv)) {
0973         pr_warn("Error reading Wireless status\n");
0974         return -EINVAL;
0975     }
0976     return !!(status & mask);
0977 }
0978 
0979 /*
0980  * WLAN
0981  */
0982 static int asus_wlan_set(struct asus_laptop *asus, int status)
0983 {
0984     if (write_acpi_int(asus->handle, METHOD_WLAN, !!status)) {
0985         pr_warn("Error setting wlan status to %d\n", status);
0986         return -EIO;
0987     }
0988     return 0;
0989 }
0990 
0991 static ssize_t wlan_show(struct device *dev, struct device_attribute *attr,
0992              char *buf)
0993 {
0994     struct asus_laptop *asus = dev_get_drvdata(dev);
0995 
0996     return sprintf(buf, "%d\n", asus_wireless_status(asus, WL_RSTS));
0997 }
0998 
0999 static ssize_t wlan_store(struct device *dev, struct device_attribute *attr,
1000               const char *buf, size_t count)
1001 {
1002     struct asus_laptop *asus = dev_get_drvdata(dev);
1003 
1004     return sysfs_acpi_set(asus, buf, count, METHOD_WLAN);
1005 }
1006 static DEVICE_ATTR_RW(wlan);
1007 
1008 /*e
1009  * Bluetooth
1010  */
1011 static int asus_bluetooth_set(struct asus_laptop *asus, int status)
1012 {
1013     if (write_acpi_int(asus->handle, METHOD_BLUETOOTH, !!status)) {
1014         pr_warn("Error setting bluetooth status to %d\n", status);
1015         return -EIO;
1016     }
1017     return 0;
1018 }
1019 
1020 static ssize_t bluetooth_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, BT_RSTS));
1026 }
1027 
1028 static ssize_t bluetooth_store(struct device *dev,
1029                    struct device_attribute *attr, const char *buf,
1030                    size_t count)
1031 {
1032     struct asus_laptop *asus = dev_get_drvdata(dev);
1033 
1034     return sysfs_acpi_set(asus, buf, count, METHOD_BLUETOOTH);
1035 }
1036 static DEVICE_ATTR_RW(bluetooth);
1037 
1038 /*
1039  * Wimax
1040  */
1041 static int asus_wimax_set(struct asus_laptop *asus, int status)
1042 {
1043     if (write_acpi_int(asus->handle, METHOD_WIMAX, !!status)) {
1044         pr_warn("Error setting wimax status to %d\n", status);
1045         return -EIO;
1046     }
1047     return 0;
1048 }
1049 
1050 static ssize_t wimax_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, WM_RSTS));
1056 }
1057 
1058 static ssize_t wimax_store(struct device *dev, struct device_attribute *attr,
1059                const char *buf, size_t count)
1060 {
1061     struct asus_laptop *asus = dev_get_drvdata(dev);
1062 
1063     return sysfs_acpi_set(asus, buf, count, METHOD_WIMAX);
1064 }
1065 static DEVICE_ATTR_RW(wimax);
1066 
1067 /*
1068  * Wwan
1069  */
1070 static int asus_wwan_set(struct asus_laptop *asus, int status)
1071 {
1072     if (write_acpi_int(asus->handle, METHOD_WWAN, !!status)) {
1073         pr_warn("Error setting wwan status to %d\n", status);
1074         return -EIO;
1075     }
1076     return 0;
1077 }
1078 
1079 static ssize_t wwan_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, WW_RSTS));
1085 }
1086 
1087 static ssize_t wwan_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_WWAN);
1093 }
1094 static DEVICE_ATTR_RW(wwan);
1095 
1096 /*
1097  * Display
1098  */
1099 static void asus_set_display(struct asus_laptop *asus, int value)
1100 {
1101     /* no sanity check needed for now */
1102     if (write_acpi_int(asus->handle, METHOD_SWITCH_DISPLAY, value))
1103         pr_warn("Error setting display\n");
1104     return;
1105 }
1106 
1107 /*
1108  * Experimental support for display switching. As of now: 1 should activate
1109  * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
1110  * Any combination (bitwise) of these will suffice. I never actually tested 4
1111  * displays hooked up simultaneously, so be warned. See the acpi4asus README
1112  * for more info.
1113  */
1114 static ssize_t display_store(struct device *dev, struct device_attribute *attr,
1115                  const char *buf, size_t count)
1116 {
1117     struct asus_laptop *asus = dev_get_drvdata(dev);
1118     int rv, value;
1119 
1120     rv = kstrtoint(buf, 0, &value);
1121     if (rv < 0)
1122         return rv;
1123 
1124     asus_set_display(asus, value);
1125     return count;
1126 }
1127 static DEVICE_ATTR_WO(display);
1128 
1129 /*
1130  * Light Sens
1131  */
1132 static void asus_als_switch(struct asus_laptop *asus, int value)
1133 {
1134     int ret;
1135 
1136     if (asus->is_pega_lucid) {
1137         ret = asus_pega_lucid_set(asus, PEGA_ALS, value);
1138         if (!ret)
1139             ret = asus_pega_lucid_set(asus, PEGA_ALS_POWER, value);
1140     } else {
1141         ret = write_acpi_int(asus->handle, METHOD_ALS_CONTROL, value);
1142     }
1143     if (ret)
1144         pr_warn("Error setting light sensor switch\n");
1145 
1146     asus->light_switch = value;
1147 }
1148 
1149 static ssize_t ls_switch_show(struct device *dev, struct device_attribute *attr,
1150                   char *buf)
1151 {
1152     struct asus_laptop *asus = dev_get_drvdata(dev);
1153 
1154     return sprintf(buf, "%d\n", asus->light_switch);
1155 }
1156 
1157 static ssize_t ls_switch_store(struct device *dev,
1158                    struct device_attribute *attr, const char *buf,
1159                    size_t count)
1160 {
1161     struct asus_laptop *asus = dev_get_drvdata(dev);
1162     int rv, value;
1163 
1164     rv = kstrtoint(buf, 0, &value);
1165     if (rv < 0)
1166         return rv;
1167 
1168     asus_als_switch(asus, value ? 1 : 0);
1169     return count;
1170 }
1171 static DEVICE_ATTR_RW(ls_switch);
1172 
1173 static void asus_als_level(struct asus_laptop *asus, int value)
1174 {
1175     if (write_acpi_int(asus->handle, METHOD_ALS_LEVEL, value))
1176         pr_warn("Error setting light sensor level\n");
1177     asus->light_level = value;
1178 }
1179 
1180 static ssize_t ls_level_show(struct device *dev, struct device_attribute *attr,
1181                  char *buf)
1182 {
1183     struct asus_laptop *asus = dev_get_drvdata(dev);
1184 
1185     return sprintf(buf, "%d\n", asus->light_level);
1186 }
1187 
1188 static ssize_t ls_level_store(struct device *dev, struct device_attribute *attr,
1189                   const char *buf, size_t count)
1190 {
1191     struct asus_laptop *asus = dev_get_drvdata(dev);
1192     int rv, value;
1193 
1194     rv = kstrtoint(buf, 0, &value);
1195     if (rv < 0)
1196         return rv;
1197 
1198     value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
1199     /* 0 <= value <= 15 */
1200     asus_als_level(asus, value);
1201 
1202     return count;
1203 }
1204 static DEVICE_ATTR_RW(ls_level);
1205 
1206 static int pega_int_read(struct asus_laptop *asus, int arg, int *result)
1207 {
1208     struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1209     int err = write_acpi_int_ret(asus->handle, METHOD_PEGA_READ, arg,
1210                      &buffer);
1211     if (!err) {
1212         union acpi_object *obj = buffer.pointer;
1213         if (obj && obj->type == ACPI_TYPE_INTEGER)
1214             *result = obj->integer.value;
1215         else
1216             err = -EIO;
1217     }
1218     return err;
1219 }
1220 
1221 static ssize_t ls_value_show(struct device *dev, struct device_attribute *attr,
1222                  char *buf)
1223 {
1224     struct asus_laptop *asus = dev_get_drvdata(dev);
1225     int err, hi, lo;
1226 
1227     err = pega_int_read(asus, PEGA_READ_ALS_H, &hi);
1228     if (!err)
1229         err = pega_int_read(asus, PEGA_READ_ALS_L, &lo);
1230     if (!err)
1231         return sprintf(buf, "%d\n", 10 * hi + lo);
1232     return err;
1233 }
1234 static DEVICE_ATTR_RO(ls_value);
1235 
1236 /*
1237  * GPS
1238  */
1239 static int asus_gps_status(struct asus_laptop *asus)
1240 {
1241     unsigned long long status;
1242     acpi_status rv;
1243 
1244     rv = acpi_evaluate_integer(asus->handle, METHOD_GPS_STATUS,
1245                    NULL, &status);
1246     if (ACPI_FAILURE(rv)) {
1247         pr_warn("Error reading GPS status\n");
1248         return -ENODEV;
1249     }
1250     return !!status;
1251 }
1252 
1253 static int asus_gps_switch(struct asus_laptop *asus, int status)
1254 {
1255     const char *meth = status ? METHOD_GPS_ON : METHOD_GPS_OFF;
1256 
1257     if (write_acpi_int(asus->handle, meth, 0x02))
1258         return -ENODEV;
1259     return 0;
1260 }
1261 
1262 static ssize_t gps_show(struct device *dev, struct device_attribute *attr,
1263             char *buf)
1264 {
1265     struct asus_laptop *asus = dev_get_drvdata(dev);
1266 
1267     return sprintf(buf, "%d\n", asus_gps_status(asus));
1268 }
1269 
1270 static ssize_t gps_store(struct device *dev, struct device_attribute *attr,
1271              const char *buf, size_t count)
1272 {
1273     struct asus_laptop *asus = dev_get_drvdata(dev);
1274     int rv, value;
1275     int ret;
1276 
1277     rv = kstrtoint(buf, 0, &value);
1278     if (rv < 0)
1279         return rv;
1280     ret = asus_gps_switch(asus, !!value);
1281     if (ret)
1282         return ret;
1283     rfkill_set_sw_state(asus->gps.rfkill, !value);
1284     return count;
1285 }
1286 static DEVICE_ATTR_RW(gps);
1287 
1288 /*
1289  * rfkill
1290  */
1291 static int asus_gps_rfkill_set(void *data, bool blocked)
1292 {
1293     struct asus_laptop *asus = data;
1294 
1295     return asus_gps_switch(asus, !blocked);
1296 }
1297 
1298 static const struct rfkill_ops asus_gps_rfkill_ops = {
1299     .set_block = asus_gps_rfkill_set,
1300 };
1301 
1302 static int asus_rfkill_set(void *data, bool blocked)
1303 {
1304     struct asus_rfkill *rfk = data;
1305     struct asus_laptop *asus = rfk->asus;
1306 
1307     if (rfk->control_id == WL_RSTS)
1308         return asus_wlan_set(asus, !blocked);
1309     else if (rfk->control_id == BT_RSTS)
1310         return asus_bluetooth_set(asus, !blocked);
1311     else if (rfk->control_id == WM_RSTS)
1312         return asus_wimax_set(asus, !blocked);
1313     else if (rfk->control_id == WW_RSTS)
1314         return asus_wwan_set(asus, !blocked);
1315 
1316     return -EINVAL;
1317 }
1318 
1319 static const struct rfkill_ops asus_rfkill_ops = {
1320     .set_block = asus_rfkill_set,
1321 };
1322 
1323 static void asus_rfkill_terminate(struct asus_rfkill *rfk)
1324 {
1325     if (!rfk->rfkill)
1326         return ;
1327 
1328     rfkill_unregister(rfk->rfkill);
1329     rfkill_destroy(rfk->rfkill);
1330     rfk->rfkill = NULL;
1331 }
1332 
1333 static void asus_rfkill_exit(struct asus_laptop *asus)
1334 {
1335     asus_rfkill_terminate(&asus->wwan);
1336     asus_rfkill_terminate(&asus->bluetooth);
1337     asus_rfkill_terminate(&asus->wlan);
1338     asus_rfkill_terminate(&asus->gps);
1339 }
1340 
1341 static int asus_rfkill_setup(struct asus_laptop *asus, struct asus_rfkill *rfk,
1342                  const char *name, int control_id, int type,
1343                  const struct rfkill_ops *ops)
1344 {
1345     int result;
1346 
1347     rfk->control_id = control_id;
1348     rfk->asus = asus;
1349     rfk->rfkill = rfkill_alloc(name, &asus->platform_device->dev,
1350                    type, ops, rfk);
1351     if (!rfk->rfkill)
1352         return -EINVAL;
1353 
1354     result = rfkill_register(rfk->rfkill);
1355     if (result) {
1356         rfkill_destroy(rfk->rfkill);
1357         rfk->rfkill = NULL;
1358     }
1359 
1360     return result;
1361 }
1362 
1363 static int asus_rfkill_init(struct asus_laptop *asus)
1364 {
1365     int result = 0;
1366 
1367     if (asus->is_pega_lucid)
1368         return -ENODEV;
1369 
1370     if (!acpi_check_handle(asus->handle, METHOD_GPS_ON, NULL) &&
1371         !acpi_check_handle(asus->handle, METHOD_GPS_OFF, NULL) &&
1372         !acpi_check_handle(asus->handle, METHOD_GPS_STATUS, NULL))
1373         result = asus_rfkill_setup(asus, &asus->gps, "asus-gps",
1374                        -1, RFKILL_TYPE_GPS,
1375                        &asus_gps_rfkill_ops);
1376     if (result)
1377         goto exit;
1378 
1379 
1380     if (!acpi_check_handle(asus->handle, METHOD_WLAN, NULL) &&
1381         asus->wled_type == TYPE_RFKILL)
1382         result = asus_rfkill_setup(asus, &asus->wlan, "asus-wlan",
1383                        WL_RSTS, RFKILL_TYPE_WLAN,
1384                        &asus_rfkill_ops);
1385     if (result)
1386         goto exit;
1387 
1388     if (!acpi_check_handle(asus->handle, METHOD_BLUETOOTH, NULL) &&
1389         asus->bled_type == TYPE_RFKILL)
1390         result = asus_rfkill_setup(asus, &asus->bluetooth,
1391                        "asus-bluetooth", BT_RSTS,
1392                        RFKILL_TYPE_BLUETOOTH,
1393                        &asus_rfkill_ops);
1394     if (result)
1395         goto exit;
1396 
1397     if (!acpi_check_handle(asus->handle, METHOD_WWAN, NULL))
1398         result = asus_rfkill_setup(asus, &asus->wwan, "asus-wwan",
1399                        WW_RSTS, RFKILL_TYPE_WWAN,
1400                        &asus_rfkill_ops);
1401     if (result)
1402         goto exit;
1403 
1404     if (!acpi_check_handle(asus->handle, METHOD_WIMAX, NULL))
1405         result = asus_rfkill_setup(asus, &asus->wimax, "asus-wimax",
1406                        WM_RSTS, RFKILL_TYPE_WIMAX,
1407                        &asus_rfkill_ops);
1408     if (result)
1409         goto exit;
1410 
1411 exit:
1412     if (result)
1413         asus_rfkill_exit(asus);
1414 
1415     return result;
1416 }
1417 
1418 static int pega_rfkill_set(void *data, bool blocked)
1419 {
1420     struct asus_rfkill *rfk = data;
1421 
1422     int ret = asus_pega_lucid_set(rfk->asus, rfk->control_id, !blocked);
1423     return ret;
1424 }
1425 
1426 static const struct rfkill_ops pega_rfkill_ops = {
1427     .set_block = pega_rfkill_set,
1428 };
1429 
1430 static int pega_rfkill_setup(struct asus_laptop *asus, struct asus_rfkill *rfk,
1431                  const char *name, int controlid, int rfkill_type)
1432 {
1433     return asus_rfkill_setup(asus, rfk, name, controlid, rfkill_type,
1434                  &pega_rfkill_ops);
1435 }
1436 
1437 static int pega_rfkill_init(struct asus_laptop *asus)
1438 {
1439     int ret = 0;
1440 
1441     if(!asus->is_pega_lucid)
1442         return -ENODEV;
1443 
1444     ret = pega_rfkill_setup(asus, &asus->wlan, "pega-wlan",
1445                 PEGA_WLAN, RFKILL_TYPE_WLAN);
1446     if(ret)
1447         goto exit;
1448 
1449     ret = pega_rfkill_setup(asus, &asus->bluetooth, "pega-bt",
1450                 PEGA_BLUETOOTH, RFKILL_TYPE_BLUETOOTH);
1451     if(ret)
1452         goto exit;
1453 
1454     ret = pega_rfkill_setup(asus, &asus->wwan, "pega-wwan",
1455                 PEGA_WWAN, RFKILL_TYPE_WWAN);
1456 
1457 exit:
1458     if (ret)
1459         asus_rfkill_exit(asus);
1460 
1461     return ret;
1462 }
1463 
1464 /*
1465  * Input device (i.e. hotkeys)
1466  */
1467 static void asus_input_notify(struct asus_laptop *asus, int event)
1468 {
1469     if (!asus->inputdev)
1470         return ;
1471     if (!sparse_keymap_report_event(asus->inputdev, event, 1, true))
1472         pr_info("Unknown key %x pressed\n", event);
1473 }
1474 
1475 static int asus_input_init(struct asus_laptop *asus)
1476 {
1477     struct input_dev *input;
1478     int error;
1479 
1480     input = input_allocate_device();
1481     if (!input)
1482         return -ENOMEM;
1483 
1484     input->name = "Asus Laptop extra buttons";
1485     input->phys = ASUS_LAPTOP_FILE "/input0";
1486     input->id.bustype = BUS_HOST;
1487     input->dev.parent = &asus->platform_device->dev;
1488 
1489     error = sparse_keymap_setup(input, asus_keymap, NULL);
1490     if (error) {
1491         pr_err("Unable to setup input device keymap\n");
1492         goto err_free_dev;
1493     }
1494     error = input_register_device(input);
1495     if (error) {
1496         pr_warn("Unable to register input device\n");
1497         goto err_free_dev;
1498     }
1499 
1500     asus->inputdev = input;
1501     return 0;
1502 
1503 err_free_dev:
1504     input_free_device(input);
1505     return error;
1506 }
1507 
1508 static void asus_input_exit(struct asus_laptop *asus)
1509 {
1510     if (asus->inputdev)
1511         input_unregister_device(asus->inputdev);
1512     asus->inputdev = NULL;
1513 }
1514 
1515 /*
1516  * ACPI driver
1517  */
1518 static void asus_acpi_notify(struct acpi_device *device, u32 event)
1519 {
1520     struct asus_laptop *asus = acpi_driver_data(device);
1521     u16 count;
1522 
1523     /* TODO Find a better way to handle events count. */
1524     count = asus->event_count[event % 128]++;
1525     acpi_bus_generate_netlink_event(asus->device->pnp.device_class,
1526                     dev_name(&asus->device->dev), event,
1527                     count);
1528 
1529     if (event >= ATKD_BRNUP_MIN && event <= ATKD_BRNUP_MAX)
1530         event = ATKD_BRNUP;
1531     else if (event >= ATKD_BRNDOWN_MIN &&
1532          event <= ATKD_BRNDOWN_MAX)
1533         event = ATKD_BRNDOWN;
1534 
1535     /* Brightness events are special */
1536     if (event == ATKD_BRNDOWN || event == ATKD_BRNUP) {
1537         if (asus->backlight_device != NULL) {
1538             /* Update the backlight device. */
1539             asus_backlight_notify(asus);
1540             return ;
1541         }
1542     }
1543 
1544     /* Accelerometer "coarse orientation change" event */
1545     if (asus->pega_accel_poll && event == 0xEA) {
1546         kobject_uevent(&asus->pega_accel_poll->dev.kobj, KOBJ_CHANGE);
1547         return ;
1548     }
1549 
1550     asus_input_notify(asus, event);
1551 }
1552 
1553 static struct attribute *asus_attributes[] = {
1554     &dev_attr_infos.attr,
1555     &dev_attr_wlan.attr,
1556     &dev_attr_bluetooth.attr,
1557     &dev_attr_wimax.attr,
1558     &dev_attr_wwan.attr,
1559     &dev_attr_display.attr,
1560     &dev_attr_ledd.attr,
1561     &dev_attr_ls_value.attr,
1562     &dev_attr_ls_level.attr,
1563     &dev_attr_ls_switch.attr,
1564     &dev_attr_gps.attr,
1565     NULL
1566 };
1567 
1568 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1569                     struct attribute *attr,
1570                     int idx)
1571 {
1572     struct device *dev = kobj_to_dev(kobj);
1573     struct asus_laptop *asus = dev_get_drvdata(dev);
1574     acpi_handle handle = asus->handle;
1575     bool supported;
1576 
1577     if (asus->is_pega_lucid) {
1578         /* no ls_level interface on the Lucid */
1579         if (attr == &dev_attr_ls_switch.attr)
1580             supported = true;
1581         else if (attr == &dev_attr_ls_level.attr)
1582             supported = false;
1583         else
1584             goto normal;
1585 
1586         return supported ? attr->mode : 0;
1587     }
1588 
1589 normal:
1590     if (attr == &dev_attr_wlan.attr) {
1591         supported = !acpi_check_handle(handle, METHOD_WLAN, NULL);
1592 
1593     } else if (attr == &dev_attr_bluetooth.attr) {
1594         supported = !acpi_check_handle(handle, METHOD_BLUETOOTH, NULL);
1595 
1596     } else if (attr == &dev_attr_display.attr) {
1597         supported = !acpi_check_handle(handle, METHOD_SWITCH_DISPLAY, NULL);
1598 
1599     } else if (attr == &dev_attr_wimax.attr) {
1600         supported =
1601             !acpi_check_handle(asus->handle, METHOD_WIMAX, NULL);
1602 
1603     } else if (attr == &dev_attr_wwan.attr) {
1604         supported = !acpi_check_handle(asus->handle, METHOD_WWAN, NULL);
1605 
1606     } else if (attr == &dev_attr_ledd.attr) {
1607         supported = !acpi_check_handle(handle, METHOD_LEDD, NULL);
1608 
1609     } else if (attr == &dev_attr_ls_switch.attr ||
1610            attr == &dev_attr_ls_level.attr) {
1611         supported = !acpi_check_handle(handle, METHOD_ALS_CONTROL, NULL) &&
1612             !acpi_check_handle(handle, METHOD_ALS_LEVEL, NULL);
1613     } else if (attr == &dev_attr_ls_value.attr) {
1614         supported = asus->is_pega_lucid;
1615     } else if (attr == &dev_attr_gps.attr) {
1616         supported = !acpi_check_handle(handle, METHOD_GPS_ON, NULL) &&
1617                 !acpi_check_handle(handle, METHOD_GPS_OFF, NULL) &&
1618                 !acpi_check_handle(handle, METHOD_GPS_STATUS, NULL);
1619     } else {
1620         supported = true;
1621     }
1622 
1623     return supported ? attr->mode : 0;
1624 }
1625 
1626 
1627 static const struct attribute_group asus_attr_group = {
1628     .is_visible = asus_sysfs_is_visible,
1629     .attrs      = asus_attributes,
1630 };
1631 
1632 static int asus_platform_init(struct asus_laptop *asus)
1633 {
1634     int result;
1635 
1636     asus->platform_device = platform_device_alloc(ASUS_LAPTOP_FILE, -1);
1637     if (!asus->platform_device)
1638         return -ENOMEM;
1639     platform_set_drvdata(asus->platform_device, asus);
1640 
1641     result = platform_device_add(asus->platform_device);
1642     if (result)
1643         goto fail_platform_device;
1644 
1645     result = sysfs_create_group(&asus->platform_device->dev.kobj,
1646                     &asus_attr_group);
1647     if (result)
1648         goto fail_sysfs;
1649 
1650     return 0;
1651 
1652 fail_sysfs:
1653     platform_device_del(asus->platform_device);
1654 fail_platform_device:
1655     platform_device_put(asus->platform_device);
1656     return result;
1657 }
1658 
1659 static void asus_platform_exit(struct asus_laptop *asus)
1660 {
1661     sysfs_remove_group(&asus->platform_device->dev.kobj, &asus_attr_group);
1662     platform_device_unregister(asus->platform_device);
1663 }
1664 
1665 static struct platform_driver platform_driver = {
1666     .driver = {
1667         .name = ASUS_LAPTOP_FILE,
1668     },
1669 };
1670 
1671 /*
1672  * This function is used to initialize the context with right values. In this
1673  * method, we can make all the detection we want, and modify the asus_laptop
1674  * struct
1675  */
1676 static int asus_laptop_get_info(struct asus_laptop *asus)
1677 {
1678     struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1679     union acpi_object *model = NULL;
1680     unsigned long long bsts_result;
1681     char *string = NULL;
1682     acpi_status status;
1683 
1684     /*
1685      * Get DSDT headers early enough to allow for differentiating between
1686      * models, but late enough to allow acpi_bus_register_driver() to fail
1687      * before doing anything ACPI-specific. Should we encounter a machine,
1688      * which needs special handling (i.e. its hotkey device has a different
1689      * HID), this bit will be moved.
1690      */
1691     status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus->dsdt_info);
1692     if (ACPI_FAILURE(status))
1693         pr_warn("Couldn't get the DSDT table header\n");
1694 
1695     /* We have to write 0 on init this far for all ASUS models */
1696     if (write_acpi_int_ret(asus->handle, "INIT", 0, &buffer)) {
1697         pr_err("Hotkey initialization failed\n");
1698         return -ENODEV;
1699     }
1700 
1701     /* This needs to be called for some laptops to init properly */
1702     status =
1703         acpi_evaluate_integer(asus->handle, "BSTS", NULL, &bsts_result);
1704     if (ACPI_FAILURE(status))
1705         pr_warn("Error calling BSTS\n");
1706     else if (bsts_result)
1707         pr_notice("BSTS called, 0x%02x returned\n",
1708                (uint) bsts_result);
1709 
1710     /* This too ... */
1711     if (write_acpi_int(asus->handle, "CWAP", wapf))
1712         pr_err("Error calling CWAP(%d)\n", wapf);
1713     /*
1714      * Try to match the object returned by INIT to the specific model.
1715      * Handle every possible object (or the lack of thereof) the DSDT
1716      * writers might throw at us. When in trouble, we pass NULL to
1717      * asus_model_match() and try something completely different.
1718      */
1719     if (buffer.pointer) {
1720         model = buffer.pointer;
1721         switch (model->type) {
1722         case ACPI_TYPE_STRING:
1723             string = model->string.pointer;
1724             break;
1725         case ACPI_TYPE_BUFFER:
1726             string = model->buffer.pointer;
1727             break;
1728         default:
1729             string = "";
1730             break;
1731         }
1732     }
1733     asus->name = kstrdup(string, GFP_KERNEL);
1734     if (!asus->name) {
1735         kfree(buffer.pointer);
1736         return -ENOMEM;
1737     }
1738 
1739     if (string)
1740         pr_notice("  %s model detected\n", string);
1741 
1742     if (!acpi_check_handle(asus->handle, METHOD_WL_STATUS, NULL))
1743         asus->have_rsts = true;
1744 
1745     kfree(model);
1746 
1747     return AE_OK;
1748 }
1749 
1750 static int asus_acpi_init(struct asus_laptop *asus)
1751 {
1752     int result = 0;
1753 
1754     result = acpi_bus_get_status(asus->device);
1755     if (result)
1756         return result;
1757     if (!asus->device->status.present) {
1758         pr_err("Hotkey device not present, aborting\n");
1759         return -ENODEV;
1760     }
1761 
1762     result = asus_laptop_get_info(asus);
1763     if (result)
1764         return result;
1765 
1766     if (!strcmp(bled_type, "led"))
1767         asus->bled_type = TYPE_LED;
1768     else if (!strcmp(bled_type, "rfkill"))
1769         asus->bled_type = TYPE_RFKILL;
1770 
1771     if (!strcmp(wled_type, "led"))
1772         asus->wled_type = TYPE_LED;
1773     else if (!strcmp(wled_type, "rfkill"))
1774         asus->wled_type = TYPE_RFKILL;
1775 
1776     if (bluetooth_status >= 0)
1777         asus_bluetooth_set(asus, !!bluetooth_status);
1778 
1779     if (wlan_status >= 0)
1780         asus_wlan_set(asus, !!wlan_status);
1781 
1782     if (wimax_status >= 0)
1783         asus_wimax_set(asus, !!wimax_status);
1784 
1785     if (wwan_status >= 0)
1786         asus_wwan_set(asus, !!wwan_status);
1787 
1788     /* Keyboard Backlight is on by default */
1789     if (!acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_SET, NULL))
1790         asus_kled_set(asus, 1);
1791 
1792     /* LED display is off by default */
1793     asus->ledd_status = 0xFFF;
1794 
1795     /* Set initial values of light sensor and level */
1796     asus->light_switch = !!als_status;
1797     asus->light_level = 5;  /* level 5 for sensor sensitivity */
1798 
1799     if (asus->is_pega_lucid) {
1800         asus_als_switch(asus, asus->light_switch);
1801     } else if (!acpi_check_handle(asus->handle, METHOD_ALS_CONTROL, NULL) &&
1802            !acpi_check_handle(asus->handle, METHOD_ALS_LEVEL, NULL)) {
1803         asus_als_switch(asus, asus->light_switch);
1804         asus_als_level(asus, asus->light_level);
1805     }
1806 
1807     return result;
1808 }
1809 
1810 static void asus_dmi_check(void)
1811 {
1812     const char *model;
1813 
1814     model = dmi_get_system_info(DMI_PRODUCT_NAME);
1815     if (!model)
1816         return;
1817 
1818     /* On L1400B WLED control the sound card, don't mess with it ... */
1819     if (strncmp(model, "L1400B", 6) == 0) {
1820         wlan_status = -1;
1821     }
1822 }
1823 
1824 static bool asus_device_present;
1825 
1826 static int asus_acpi_add(struct acpi_device *device)
1827 {
1828     struct asus_laptop *asus;
1829     int result;
1830 
1831     pr_notice("Asus Laptop Support version %s\n",
1832           ASUS_LAPTOP_VERSION);
1833     asus = kzalloc(sizeof(struct asus_laptop), GFP_KERNEL);
1834     if (!asus)
1835         return -ENOMEM;
1836     asus->handle = device->handle;
1837     strcpy(acpi_device_name(device), ASUS_LAPTOP_DEVICE_NAME);
1838     strcpy(acpi_device_class(device), ASUS_LAPTOP_CLASS);
1839     device->driver_data = asus;
1840     asus->device = device;
1841 
1842     asus_dmi_check();
1843 
1844     result = asus_acpi_init(asus);
1845     if (result)
1846         goto fail_platform;
1847 
1848     /*
1849      * Need platform type detection first, then the platform
1850      * device.  It is used as a parent for the sub-devices below.
1851      */
1852     asus->is_pega_lucid = asus_check_pega_lucid(asus);
1853     result = asus_platform_init(asus);
1854     if (result)
1855         goto fail_platform;
1856 
1857     if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1858         result = asus_backlight_init(asus);
1859         if (result)
1860             goto fail_backlight;
1861     }
1862 
1863     result = asus_input_init(asus);
1864     if (result)
1865         goto fail_input;
1866 
1867     result = asus_led_init(asus);
1868     if (result)
1869         goto fail_led;
1870 
1871     result = asus_rfkill_init(asus);
1872     if (result && result != -ENODEV)
1873         goto fail_rfkill;
1874 
1875     result = pega_accel_init(asus);
1876     if (result && result != -ENODEV)
1877         goto fail_pega_accel;
1878 
1879     result = pega_rfkill_init(asus);
1880     if (result && result != -ENODEV)
1881         goto fail_pega_rfkill;
1882 
1883     asus_device_present = true;
1884     return 0;
1885 
1886 fail_pega_rfkill:
1887     pega_accel_exit(asus);
1888 fail_pega_accel:
1889     asus_rfkill_exit(asus);
1890 fail_rfkill:
1891     asus_led_exit(asus);
1892 fail_led:
1893     asus_input_exit(asus);
1894 fail_input:
1895     asus_backlight_exit(asus);
1896 fail_backlight:
1897     asus_platform_exit(asus);
1898 fail_platform:
1899     kfree(asus);
1900 
1901     return result;
1902 }
1903 
1904 static int asus_acpi_remove(struct acpi_device *device)
1905 {
1906     struct asus_laptop *asus = acpi_driver_data(device);
1907 
1908     asus_backlight_exit(asus);
1909     asus_rfkill_exit(asus);
1910     asus_led_exit(asus);
1911     asus_input_exit(asus);
1912     pega_accel_exit(asus);
1913     asus_platform_exit(asus);
1914 
1915     kfree(asus->name);
1916     kfree(asus);
1917     return 0;
1918 }
1919 
1920 static const struct acpi_device_id asus_device_ids[] = {
1921     {"ATK0100", 0},
1922     {"ATK0101", 0},
1923     {"", 0},
1924 };
1925 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
1926 
1927 static struct acpi_driver asus_acpi_driver = {
1928     .name = ASUS_LAPTOP_NAME,
1929     .class = ASUS_LAPTOP_CLASS,
1930     .owner = THIS_MODULE,
1931     .ids = asus_device_ids,
1932     .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1933     .ops = {
1934         .add = asus_acpi_add,
1935         .remove = asus_acpi_remove,
1936         .notify = asus_acpi_notify,
1937         },
1938 };
1939 
1940 static int __init asus_laptop_init(void)
1941 {
1942     int result;
1943 
1944     result = platform_driver_register(&platform_driver);
1945     if (result < 0)
1946         return result;
1947 
1948     result = acpi_bus_register_driver(&asus_acpi_driver);
1949     if (result < 0)
1950         goto fail_acpi_driver;
1951     if (!asus_device_present) {
1952         result = -ENODEV;
1953         goto fail_no_device;
1954     }
1955     return 0;
1956 
1957 fail_no_device:
1958     acpi_bus_unregister_driver(&asus_acpi_driver);
1959 fail_acpi_driver:
1960     platform_driver_unregister(&platform_driver);
1961     return result;
1962 }
1963 
1964 static void __exit asus_laptop_exit(void)
1965 {
1966     acpi_bus_unregister_driver(&asus_acpi_driver);
1967     platform_driver_unregister(&platform_driver);
1968 }
1969 
1970 module_init(asus_laptop_init);
1971 module_exit(asus_laptop_exit);
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