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e59f8796 EC |
1 | /* |
2 | * eepc-laptop.c - Asus Eee PC extras | |
3 | * | |
4 | * Based on asus_acpi.c as patched for the Eee PC by Asus: | |
5 | * ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar | |
6 | * Based on eee.c from eeepc-linux | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/platform_device.h> | |
a5fa429b CC |
24 | #include <linux/backlight.h> |
25 | #include <linux/fb.h> | |
e1faa9da CC |
26 | #include <linux/hwmon.h> |
27 | #include <linux/hwmon-sysfs.h> | |
e59f8796 EC |
28 | #include <acpi/acpi_drivers.h> |
29 | #include <acpi/acpi_bus.h> | |
30 | #include <linux/uaccess.h> | |
31 | ||
32 | #define EEEPC_LAPTOP_VERSION "0.1" | |
33 | ||
34 | #define EEEPC_HOTK_NAME "Eee PC Hotkey Driver" | |
35 | #define EEEPC_HOTK_FILE "eeepc" | |
36 | #define EEEPC_HOTK_CLASS "hotkey" | |
37 | #define EEEPC_HOTK_DEVICE_NAME "Hotkey" | |
38 | #define EEEPC_HOTK_HID "ASUS010" | |
39 | ||
40 | #define EEEPC_LOG EEEPC_HOTK_FILE ": " | |
41 | #define EEEPC_ERR KERN_ERR EEEPC_LOG | |
42 | #define EEEPC_WARNING KERN_WARNING EEEPC_LOG | |
43 | #define EEEPC_NOTICE KERN_NOTICE EEEPC_LOG | |
44 | #define EEEPC_INFO KERN_INFO EEEPC_LOG | |
45 | ||
46 | /* | |
47 | * Definitions for Asus EeePC | |
48 | */ | |
49 | #define NOTIFY_WLAN_ON 0x10 | |
a5fa429b CC |
50 | #define NOTIFY_BRN_MIN 0x20 |
51 | #define NOTIFY_BRN_MAX 0x2f | |
e59f8796 EC |
52 | |
53 | enum { | |
54 | DISABLE_ASL_WLAN = 0x0001, | |
55 | DISABLE_ASL_BLUETOOTH = 0x0002, | |
56 | DISABLE_ASL_IRDA = 0x0004, | |
57 | DISABLE_ASL_CAMERA = 0x0008, | |
58 | DISABLE_ASL_TV = 0x0010, | |
59 | DISABLE_ASL_GPS = 0x0020, | |
60 | DISABLE_ASL_DISPLAYSWITCH = 0x0040, | |
61 | DISABLE_ASL_MODEM = 0x0080, | |
62 | DISABLE_ASL_CARDREADER = 0x0100 | |
63 | }; | |
64 | ||
65 | enum { | |
66 | CM_ASL_WLAN = 0, | |
67 | CM_ASL_BLUETOOTH, | |
68 | CM_ASL_IRDA, | |
69 | CM_ASL_1394, | |
70 | CM_ASL_CAMERA, | |
71 | CM_ASL_TV, | |
72 | CM_ASL_GPS, | |
73 | CM_ASL_DVDROM, | |
74 | CM_ASL_DISPLAYSWITCH, | |
75 | CM_ASL_PANELBRIGHT, | |
76 | CM_ASL_BIOSFLASH, | |
77 | CM_ASL_ACPIFLASH, | |
78 | CM_ASL_CPUFV, | |
79 | CM_ASL_CPUTEMPERATURE, | |
80 | CM_ASL_FANCPU, | |
81 | CM_ASL_FANCHASSIS, | |
82 | CM_ASL_USBPORT1, | |
83 | CM_ASL_USBPORT2, | |
84 | CM_ASL_USBPORT3, | |
85 | CM_ASL_MODEM, | |
86 | CM_ASL_CARDREADER, | |
87 | CM_ASL_LID | |
88 | }; | |
89 | ||
14109461 | 90 | static const char *cm_getv[] = { |
e59f8796 EC |
91 | "WLDG", NULL, NULL, NULL, |
92 | "CAMG", NULL, NULL, NULL, | |
93 | NULL, "PBLG", NULL, NULL, | |
94 | "CFVG", NULL, NULL, NULL, | |
95 | "USBG", NULL, NULL, "MODG", | |
96 | "CRDG", "LIDG" | |
97 | }; | |
98 | ||
14109461 | 99 | static const char *cm_setv[] = { |
e59f8796 EC |
100 | "WLDS", NULL, NULL, NULL, |
101 | "CAMS", NULL, NULL, NULL, | |
102 | "SDSP", "PBLS", "HDPS", NULL, | |
103 | "CFVS", NULL, NULL, NULL, | |
104 | "USBG", NULL, NULL, "MODS", | |
105 | "CRDS", NULL | |
106 | }; | |
107 | ||
e1faa9da CC |
108 | #define EEEPC_EC "\\_SB.PCI0.SBRG.EC0." |
109 | ||
110 | #define EEEPC_EC_FAN_PWM EEEPC_EC "SC02" /* Fan PWM duty cycle (%) */ | |
111 | #define EEEPC_EC_SC02 0x63 | |
112 | #define EEEPC_EC_FAN_HRPM EEEPC_EC "SC05" /* High byte, fan speed (RPM) */ | |
113 | #define EEEPC_EC_FAN_LRPM EEEPC_EC "SC06" /* Low byte, fan speed (RPM) */ | |
114 | #define EEEPC_EC_FAN_CTRL EEEPC_EC "SFB3" /* Byte containing SF25 */ | |
115 | #define EEEPC_EC_SFB3 0xD3 | |
116 | ||
e59f8796 EC |
117 | /* |
118 | * This is the main structure, we can use it to store useful information | |
119 | * about the hotk device | |
120 | */ | |
121 | struct eeepc_hotk { | |
122 | struct acpi_device *device; /* the device we are in */ | |
123 | acpi_handle handle; /* the handle of the hotk device */ | |
124 | u32 cm_supported; /* the control methods supported | |
125 | by this BIOS */ | |
126 | uint init_flag; /* Init flags */ | |
127 | u16 event_count[128]; /* count for each event */ | |
128 | }; | |
129 | ||
130 | /* The actual device the driver binds to */ | |
131 | static struct eeepc_hotk *ehotk; | |
132 | ||
133 | /* Platform device/driver */ | |
134 | static struct platform_driver platform_driver = { | |
135 | .driver = { | |
136 | .name = EEEPC_HOTK_FILE, | |
137 | .owner = THIS_MODULE, | |
138 | } | |
139 | }; | |
140 | ||
141 | static struct platform_device *platform_device; | |
142 | ||
143 | /* | |
144 | * The hotkey driver declaration | |
145 | */ | |
146 | static int eeepc_hotk_add(struct acpi_device *device); | |
147 | static int eeepc_hotk_remove(struct acpi_device *device, int type); | |
148 | ||
149 | static const struct acpi_device_id eeepc_device_ids[] = { | |
150 | {EEEPC_HOTK_HID, 0}, | |
151 | {"", 0}, | |
152 | }; | |
153 | MODULE_DEVICE_TABLE(acpi, eeepc_device_ids); | |
154 | ||
155 | static struct acpi_driver eeepc_hotk_driver = { | |
156 | .name = EEEPC_HOTK_NAME, | |
157 | .class = EEEPC_HOTK_CLASS, | |
158 | .ids = eeepc_device_ids, | |
159 | .ops = { | |
160 | .add = eeepc_hotk_add, | |
161 | .remove = eeepc_hotk_remove, | |
162 | }, | |
163 | }; | |
164 | ||
a5fa429b CC |
165 | /* The backlight device /sys/class/backlight */ |
166 | static struct backlight_device *eeepc_backlight_device; | |
167 | ||
e1faa9da CC |
168 | /* The hwmon device */ |
169 | static struct device *eeepc_hwmon_device; | |
170 | ||
a5fa429b CC |
171 | /* |
172 | * The backlight class declaration | |
173 | */ | |
174 | static int read_brightness(struct backlight_device *bd); | |
175 | static int update_bl_status(struct backlight_device *bd); | |
176 | static struct backlight_ops eeepcbl_ops = { | |
177 | .get_brightness = read_brightness, | |
178 | .update_status = update_bl_status, | |
179 | }; | |
180 | ||
e59f8796 EC |
181 | MODULE_AUTHOR("Corentin Chary, Eric Cooper"); |
182 | MODULE_DESCRIPTION(EEEPC_HOTK_NAME); | |
183 | MODULE_LICENSE("GPL"); | |
184 | ||
185 | /* | |
186 | * ACPI Helpers | |
187 | */ | |
188 | static int write_acpi_int(acpi_handle handle, const char *method, int val, | |
189 | struct acpi_buffer *output) | |
190 | { | |
191 | struct acpi_object_list params; | |
192 | union acpi_object in_obj; | |
193 | acpi_status status; | |
194 | ||
195 | params.count = 1; | |
196 | params.pointer = &in_obj; | |
197 | in_obj.type = ACPI_TYPE_INTEGER; | |
198 | in_obj.integer.value = val; | |
199 | ||
200 | status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); | |
201 | return (status == AE_OK ? 0 : -1); | |
202 | } | |
203 | ||
204 | static int read_acpi_int(acpi_handle handle, const char *method, int *val) | |
205 | { | |
206 | acpi_status status; | |
207 | ulong result; | |
208 | ||
209 | status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); | |
210 | if (ACPI_FAILURE(status)) { | |
211 | *val = -1; | |
212 | return -1; | |
213 | } else { | |
214 | *val = result; | |
215 | return 0; | |
216 | } | |
217 | } | |
218 | ||
219 | static int set_acpi(int cm, int value) | |
220 | { | |
221 | if (ehotk->cm_supported & (0x1 << cm)) { | |
222 | const char *method = cm_setv[cm]; | |
223 | if (method == NULL) | |
224 | return -ENODEV; | |
225 | if (write_acpi_int(ehotk->handle, method, value, NULL)) | |
226 | printk(EEEPC_WARNING "Error writing %s\n", method); | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static int get_acpi(int cm) | |
232 | { | |
233 | int value = -1; | |
234 | if ((ehotk->cm_supported & (0x1 << cm))) { | |
235 | const char *method = cm_getv[cm]; | |
236 | if (method == NULL) | |
237 | return -ENODEV; | |
238 | if (read_acpi_int(ehotk->handle, method, &value)) | |
239 | printk(EEEPC_WARNING "Error reading %s\n", method); | |
240 | } | |
241 | return value; | |
242 | } | |
243 | ||
a5fa429b CC |
244 | /* |
245 | * Backlight | |
246 | */ | |
247 | static int read_brightness(struct backlight_device *bd) | |
248 | { | |
249 | return get_acpi(CM_ASL_PANELBRIGHT); | |
250 | } | |
251 | ||
252 | static int set_brightness(struct backlight_device *bd, int value) | |
253 | { | |
254 | value = max(0, min(15, value)); | |
255 | return set_acpi(CM_ASL_PANELBRIGHT, value); | |
256 | } | |
257 | ||
258 | static int update_bl_status(struct backlight_device *bd) | |
259 | { | |
260 | return set_brightness(bd, bd->props.brightness); | |
261 | } | |
262 | ||
e59f8796 EC |
263 | /* |
264 | * Sys helpers | |
265 | */ | |
266 | static int parse_arg(const char *buf, unsigned long count, int *val) | |
267 | { | |
268 | if (!count) | |
269 | return 0; | |
270 | if (sscanf(buf, "%i", val) != 1) | |
271 | return -EINVAL; | |
272 | return count; | |
273 | } | |
274 | ||
275 | static ssize_t store_sys_acpi(int cm, const char *buf, size_t count) | |
276 | { | |
277 | int rv, value; | |
278 | ||
279 | rv = parse_arg(buf, count, &value); | |
280 | if (rv > 0) | |
281 | set_acpi(cm, value); | |
282 | return rv; | |
283 | } | |
284 | ||
285 | static ssize_t show_sys_acpi(int cm, char *buf) | |
286 | { | |
287 | return sprintf(buf, "%d\n", get_acpi(cm)); | |
288 | } | |
289 | ||
290 | #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm) \ | |
291 | static ssize_t show_##_name(struct device *dev, \ | |
292 | struct device_attribute *attr, \ | |
293 | char *buf) \ | |
294 | { \ | |
295 | return show_sys_acpi(_cm, buf); \ | |
296 | } \ | |
297 | static ssize_t store_##_name(struct device *dev, \ | |
298 | struct device_attribute *attr, \ | |
299 | const char *buf, size_t count) \ | |
300 | { \ | |
301 | return store_sys_acpi(_cm, buf, count); \ | |
302 | } \ | |
303 | static struct device_attribute dev_attr_##_name = { \ | |
304 | .attr = { \ | |
305 | .name = __stringify(_name), \ | |
306 | .mode = 0644 }, \ | |
307 | .show = show_##_name, \ | |
308 | .store = store_##_name, \ | |
309 | } | |
310 | ||
311 | EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA); | |
312 | EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER); | |
313 | EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH); | |
314 | EEEPC_CREATE_DEVICE_ATTR(wlan, CM_ASL_WLAN); | |
315 | ||
316 | static struct attribute *platform_attributes[] = { | |
317 | &dev_attr_camera.attr, | |
318 | &dev_attr_cardr.attr, | |
319 | &dev_attr_disp.attr, | |
320 | &dev_attr_wlan.attr, | |
321 | NULL | |
322 | }; | |
323 | ||
324 | static struct attribute_group platform_attribute_group = { | |
325 | .attrs = platform_attributes | |
326 | }; | |
327 | ||
328 | /* | |
329 | * Hotkey functions | |
330 | */ | |
331 | static int eeepc_hotk_check(void) | |
332 | { | |
333 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
334 | int result; | |
335 | ||
336 | result = acpi_bus_get_status(ehotk->device); | |
337 | if (result) | |
338 | return result; | |
339 | if (ehotk->device->status.present) { | |
340 | if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag, | |
341 | &buffer)) { | |
342 | printk(EEEPC_ERR "Hotkey initialization failed\n"); | |
343 | return -ENODEV; | |
344 | } else { | |
345 | printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n", | |
346 | ehotk->init_flag); | |
347 | } | |
348 | /* get control methods supported */ | |
349 | if (read_acpi_int(ehotk->handle, "CMSG" | |
350 | , &ehotk->cm_supported)) { | |
351 | printk(EEEPC_ERR | |
352 | "Get control methods supported failed\n"); | |
353 | return -ENODEV; | |
354 | } else { | |
355 | printk(EEEPC_INFO | |
356 | "Get control methods supported: 0x%x\n", | |
357 | ehotk->cm_supported); | |
358 | } | |
359 | } else { | |
360 | printk(EEEPC_ERR "Hotkey device not present, aborting\n"); | |
361 | return -EINVAL; | |
362 | } | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static void notify_wlan(u32 *event) | |
367 | { | |
368 | /* if DISABLE_ASL_WLAN is set, the notify code for fn+f2 | |
369 | will always be 0x10 */ | |
370 | if (ehotk->cm_supported & (0x1 << CM_ASL_WLAN)) { | |
371 | const char *method = cm_getv[CM_ASL_WLAN]; | |
372 | int value; | |
373 | if (read_acpi_int(ehotk->handle, method, &value)) | |
374 | printk(EEEPC_WARNING "Error reading %s\n", | |
375 | method); | |
376 | else if (value == 1) | |
377 | *event = 0x11; | |
378 | } | |
379 | } | |
380 | ||
a5fa429b CC |
381 | static void notify_brn(void) |
382 | { | |
383 | struct backlight_device *bd = eeepc_backlight_device; | |
384 | bd->props.brightness = read_brightness(bd); | |
385 | } | |
386 | ||
e59f8796 EC |
387 | static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data) |
388 | { | |
389 | if (!ehotk) | |
390 | return; | |
391 | if (event == NOTIFY_WLAN_ON && (DISABLE_ASL_WLAN & ehotk->init_flag)) | |
392 | notify_wlan(&event); | |
a5fa429b CC |
393 | if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) |
394 | notify_brn(); | |
e59f8796 EC |
395 | acpi_bus_generate_proc_event(ehotk->device, event, |
396 | ehotk->event_count[event % 128]++); | |
397 | } | |
398 | ||
399 | static int eeepc_hotk_add(struct acpi_device *device) | |
400 | { | |
401 | acpi_status status = AE_OK; | |
402 | int result; | |
403 | ||
404 | if (!device) | |
405 | return -EINVAL; | |
406 | printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n"); | |
407 | ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL); | |
408 | if (!ehotk) | |
409 | return -ENOMEM; | |
410 | ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH; | |
411 | ehotk->handle = device->handle; | |
412 | strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME); | |
413 | strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS); | |
414 | acpi_driver_data(device) = ehotk; | |
415 | ehotk->device = device; | |
416 | result = eeepc_hotk_check(); | |
417 | if (result) | |
418 | goto end; | |
419 | status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY, | |
420 | eeepc_hotk_notify, ehotk); | |
421 | if (ACPI_FAILURE(status)) | |
422 | printk(EEEPC_ERR "Error installing notify handler\n"); | |
423 | end: | |
424 | if (result) { | |
425 | kfree(ehotk); | |
426 | ehotk = NULL; | |
427 | } | |
428 | return result; | |
429 | } | |
430 | ||
431 | static int eeepc_hotk_remove(struct acpi_device *device, int type) | |
432 | { | |
433 | acpi_status status = 0; | |
434 | ||
435 | if (!device || !acpi_driver_data(device)) | |
436 | return -EINVAL; | |
437 | status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY, | |
438 | eeepc_hotk_notify); | |
439 | if (ACPI_FAILURE(status)) | |
440 | printk(EEEPC_ERR "Error removing notify handler\n"); | |
441 | kfree(ehotk); | |
442 | return 0; | |
443 | } | |
444 | ||
e1faa9da CC |
445 | /* |
446 | * Hwmon | |
447 | */ | |
448 | static int eeepc_get_fan_pwm(void) | |
449 | { | |
450 | int value = 0; | |
451 | ||
452 | read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value); | |
453 | return (value); | |
454 | } | |
455 | ||
456 | static void eeepc_set_fan_pwm(int value) | |
457 | { | |
458 | value = SENSORS_LIMIT(value, 0, 100); | |
459 | ec_write(EEEPC_EC_SC02, value); | |
460 | } | |
461 | ||
462 | static int eeepc_get_fan_rpm(void) | |
463 | { | |
464 | int high = 0; | |
465 | int low = 0; | |
466 | ||
467 | read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high); | |
468 | read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low); | |
469 | return (high << 8 | low); | |
470 | } | |
471 | ||
472 | static int eeepc_get_fan_ctrl(void) | |
473 | { | |
474 | int value = 0; | |
475 | ||
476 | read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value); | |
477 | return ((value & 0x02 ? 1 : 0)); | |
478 | } | |
479 | ||
480 | static void eeepc_set_fan_ctrl(int manual) | |
481 | { | |
482 | int value = 0; | |
483 | ||
484 | read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value); | |
485 | if (manual) | |
486 | value |= 0x02; | |
487 | else | |
488 | value &= ~0x02; | |
489 | ec_write(EEEPC_EC_SFB3, value); | |
490 | } | |
491 | ||
492 | static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) | |
493 | { | |
494 | int rv, value; | |
495 | ||
496 | rv = parse_arg(buf, count, &value); | |
497 | if (rv > 0) | |
498 | set(value); | |
499 | return rv; | |
500 | } | |
501 | ||
502 | static ssize_t show_sys_hwmon(int (*get)(void), char *buf) | |
503 | { | |
504 | return sprintf(buf, "%d\n", get()); | |
505 | } | |
506 | ||
507 | #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \ | |
508 | static ssize_t show_##_name(struct device *dev, \ | |
509 | struct device_attribute *attr, \ | |
510 | char *buf) \ | |
511 | { \ | |
512 | return show_sys_hwmon(_set, buf); \ | |
513 | } \ | |
514 | static ssize_t store_##_name(struct device *dev, \ | |
515 | struct device_attribute *attr, \ | |
516 | const char *buf, size_t count) \ | |
517 | { \ | |
518 | return store_sys_hwmon(_get, buf, count); \ | |
519 | } \ | |
520 | static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0); | |
521 | ||
522 | EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL); | |
523 | EEEPC_CREATE_SENSOR_ATTR(fan1_pwm, S_IRUGO | S_IWUSR, | |
524 | eeepc_get_fan_pwm, eeepc_set_fan_pwm); | |
525 | EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, | |
526 | eeepc_get_fan_ctrl, eeepc_set_fan_ctrl); | |
527 | ||
528 | static struct attribute *hwmon_attributes[] = { | |
529 | &sensor_dev_attr_fan1_pwm.dev_attr.attr, | |
530 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
531 | &sensor_dev_attr_pwm1_enable.dev_attr.attr, | |
532 | NULL | |
533 | }; | |
534 | ||
535 | static struct attribute_group hwmon_attribute_group = { | |
536 | .attrs = hwmon_attributes | |
537 | }; | |
538 | ||
e59f8796 EC |
539 | /* |
540 | * exit/init | |
541 | */ | |
a5fa429b CC |
542 | static void eeepc_backlight_exit(void) |
543 | { | |
544 | if (eeepc_backlight_device) | |
545 | backlight_device_unregister(eeepc_backlight_device); | |
546 | eeepc_backlight_device = NULL; | |
547 | } | |
548 | ||
e1faa9da CC |
549 | static void eeepc_hwmon_exit(void) |
550 | { | |
551 | struct device *hwmon; | |
552 | ||
553 | hwmon = eeepc_hwmon_device; | |
554 | if (!hwmon) | |
555 | return ; | |
556 | hwmon_device_unregister(hwmon); | |
557 | sysfs_remove_group(&hwmon->kobj, | |
558 | &hwmon_attribute_group); | |
559 | eeepc_hwmon_device = NULL; | |
560 | } | |
561 | ||
e59f8796 EC |
562 | static void __exit eeepc_laptop_exit(void) |
563 | { | |
a5fa429b | 564 | eeepc_backlight_exit(); |
e1faa9da | 565 | eeepc_hwmon_exit(); |
e59f8796 EC |
566 | acpi_bus_unregister_driver(&eeepc_hotk_driver); |
567 | sysfs_remove_group(&platform_device->dev.kobj, | |
568 | &platform_attribute_group); | |
569 | platform_device_unregister(platform_device); | |
570 | platform_driver_unregister(&platform_driver); | |
571 | } | |
572 | ||
a5fa429b CC |
573 | static int eeepc_backlight_init(struct device *dev) |
574 | { | |
575 | struct backlight_device *bd; | |
576 | ||
577 | bd = backlight_device_register(EEEPC_HOTK_FILE, dev, | |
578 | NULL, &eeepcbl_ops); | |
579 | if (IS_ERR(bd)) { | |
580 | printk(EEEPC_ERR | |
581 | "Could not register eeepc backlight device\n"); | |
582 | eeepc_backlight_device = NULL; | |
583 | return PTR_ERR(bd); | |
584 | } | |
585 | eeepc_backlight_device = bd; | |
586 | bd->props.max_brightness = 15; | |
587 | bd->props.brightness = read_brightness(NULL); | |
588 | bd->props.power = FB_BLANK_UNBLANK; | |
589 | backlight_update_status(bd); | |
590 | return 0; | |
591 | } | |
592 | ||
e1faa9da CC |
593 | static int eeepc_hwmon_init(struct device *dev) |
594 | { | |
595 | struct device *hwmon; | |
596 | int result; | |
597 | ||
598 | hwmon = hwmon_device_register(dev); | |
599 | if (IS_ERR(hwmon)) { | |
600 | printk(EEEPC_ERR | |
601 | "Could not register eeepc hwmon device\n"); | |
602 | eeepc_hwmon_device = NULL; | |
603 | return PTR_ERR(hwmon); | |
604 | } | |
605 | eeepc_hwmon_device = hwmon; | |
606 | result = sysfs_create_group(&hwmon->kobj, | |
607 | &hwmon_attribute_group); | |
608 | if (result) | |
609 | eeepc_hwmon_exit(); | |
610 | return result; | |
611 | } | |
612 | ||
e59f8796 EC |
613 | static int __init eeepc_laptop_init(void) |
614 | { | |
615 | struct device *dev; | |
616 | int result; | |
617 | ||
618 | if (acpi_disabled) | |
619 | return -ENODEV; | |
620 | result = acpi_bus_register_driver(&eeepc_hotk_driver); | |
621 | if (result < 0) | |
622 | return result; | |
623 | if (!ehotk) { | |
624 | acpi_bus_unregister_driver(&eeepc_hotk_driver); | |
625 | return -ENODEV; | |
626 | } | |
627 | dev = acpi_get_physical_device(ehotk->device->handle); | |
a5fa429b CC |
628 | result = eeepc_backlight_init(dev); |
629 | if (result) | |
630 | goto fail_backlight; | |
e1faa9da CC |
631 | result = eeepc_hwmon_init(dev); |
632 | if (result) | |
633 | goto fail_hwmon; | |
e59f8796 EC |
634 | /* Register platform stuff */ |
635 | result = platform_driver_register(&platform_driver); | |
636 | if (result) | |
637 | goto fail_platform_driver; | |
638 | platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1); | |
639 | if (!platform_device) { | |
640 | result = -ENOMEM; | |
641 | goto fail_platform_device1; | |
642 | } | |
643 | result = platform_device_add(platform_device); | |
644 | if (result) | |
645 | goto fail_platform_device2; | |
646 | result = sysfs_create_group(&platform_device->dev.kobj, | |
647 | &platform_attribute_group); | |
648 | if (result) | |
649 | goto fail_sysfs; | |
650 | return 0; | |
651 | fail_sysfs: | |
652 | platform_device_del(platform_device); | |
653 | fail_platform_device2: | |
654 | platform_device_put(platform_device); | |
655 | fail_platform_device1: | |
656 | platform_driver_unregister(&platform_driver); | |
657 | fail_platform_driver: | |
e1faa9da CC |
658 | eeepc_hwmon_exit(); |
659 | fail_hwmon: | |
a5fa429b CC |
660 | eeepc_backlight_exit(); |
661 | fail_backlight: | |
e59f8796 EC |
662 | return result; |
663 | } | |
664 | ||
665 | module_init(eeepc_laptop_init); | |
666 | module_exit(eeepc_laptop_exit); |