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Commit | Line | Data |
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ad8f07cc MG |
1 | /* |
2 | * Driver for Dell laptop extras | |
3 | * | |
4 | * Copyright (c) Red Hat <mjg@redhat.com> | |
5 | * | |
6 | * Based on documentation in the libsmbios package, Copyright (C) 2005 Dell | |
7 | * Inc. | |
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 version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
eb889524 JP |
14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
15 | ||
ad8f07cc MG |
16 | #include <linux/module.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/backlight.h> | |
21 | #include <linux/err.h> | |
22 | #include <linux/dmi.h> | |
23 | #include <linux/io.h> | |
ad8f07cc MG |
24 | #include <linux/power_supply.h> |
25 | #include <linux/acpi.h> | |
116ee77b | 26 | #include <linux/mm.h> |
814cb8ad | 27 | #include <linux/i8042.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
037accfa KYL |
29 | #include <linux/debugfs.h> |
30 | #include <linux/seq_file.h> | |
cad73120 | 31 | #include "../../firmware/dcdbas.h" |
ad8f07cc MG |
32 | |
33 | #define BRIGHTNESS_TOKEN 0x7d | |
34 | ||
35 | /* This structure will be modified by the firmware when we enter | |
36 | * system management mode, hence the volatiles */ | |
37 | ||
38 | struct calling_interface_buffer { | |
39 | u16 class; | |
40 | u16 select; | |
41 | volatile u32 input[4]; | |
42 | volatile u32 output[4]; | |
43 | } __packed; | |
44 | ||
45 | struct calling_interface_token { | |
46 | u16 tokenID; | |
47 | u16 location; | |
48 | union { | |
49 | u16 value; | |
50 | u16 stringlength; | |
51 | }; | |
52 | }; | |
53 | ||
54 | struct calling_interface_structure { | |
55 | struct dmi_header header; | |
56 | u16 cmdIOAddress; | |
57 | u8 cmdIOCode; | |
58 | u32 supportedCmds; | |
59 | struct calling_interface_token tokens[]; | |
60 | } __packed; | |
61 | ||
2d8b90be AK |
62 | struct quirk_entry { |
63 | u8 touchpad_led; | |
64 | }; | |
65 | ||
66 | static struct quirk_entry *quirks; | |
67 | ||
68 | static struct quirk_entry quirk_dell_vostro_v130 = { | |
69 | .touchpad_led = 1, | |
70 | }; | |
71 | ||
72 | static int dmi_matched(const struct dmi_system_id *dmi) | |
73 | { | |
74 | quirks = dmi->driver_data; | |
75 | return 1; | |
76 | } | |
77 | ||
ad8f07cc MG |
78 | static int da_command_address; |
79 | static int da_command_code; | |
80 | static int da_num_tokens; | |
81 | static struct calling_interface_token *da_tokens; | |
82 | ||
ada3248a AJ |
83 | static struct platform_driver platform_driver = { |
84 | .driver = { | |
85 | .name = "dell-laptop", | |
86 | .owner = THIS_MODULE, | |
87 | } | |
88 | }; | |
89 | ||
90 | static struct platform_device *platform_device; | |
ad8f07cc | 91 | static struct backlight_device *dell_backlight_device; |
ad8f07cc | 92 | |
145047de | 93 | static const struct dmi_system_id dell_device_table[] __initconst = { |
ad8f07cc MG |
94 | { |
95 | .ident = "Dell laptop", | |
96 | .matches = { | |
97 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
98 | DMI_MATCH(DMI_CHASSIS_TYPE, "8"), | |
99 | }, | |
100 | }, | |
410d44c7 RK |
101 | { |
102 | .matches = { | |
103 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
104 | DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/ | |
105 | }, | |
106 | }, | |
cb6a7937 EA |
107 | { |
108 | .ident = "Dell Computer Corporation", | |
109 | .matches = { | |
110 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
111 | DMI_MATCH(DMI_CHASSIS_TYPE, "8"), | |
112 | }, | |
113 | }, | |
ad8f07cc MG |
114 | { } |
115 | }; | |
35ae64fe | 116 | MODULE_DEVICE_TABLE(dmi, dell_device_table); |
ad8f07cc | 117 | |
2d8b90be AK |
118 | static struct dmi_system_id __devinitdata dell_quirks[] = { |
119 | { | |
120 | .callback = dmi_matched, | |
121 | .ident = "Dell Vostro V130", | |
122 | .matches = { | |
123 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
124 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"), | |
125 | }, | |
126 | .driver_data = &quirk_dell_vostro_v130, | |
127 | }, | |
128 | { | |
129 | .callback = dmi_matched, | |
130 | .ident = "Dell Vostro V131", | |
131 | .matches = { | |
132 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
133 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), | |
134 | }, | |
135 | .driver_data = &quirk_dell_vostro_v130, | |
136 | }, | |
57b31b2f AWC |
137 | { |
138 | .callback = dmi_matched, | |
139 | .ident = "Dell Vostro 3350", | |
140 | .matches = { | |
141 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
142 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"), | |
143 | }, | |
144 | .driver_data = &quirk_dell_vostro_v130, | |
145 | }, | |
2a748853 AK |
146 | { |
147 | .callback = dmi_matched, | |
148 | .ident = "Dell Vostro 3555", | |
149 | .matches = { | |
150 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
151 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"), | |
152 | }, | |
153 | .driver_data = &quirk_dell_vostro_v130, | |
154 | }, | |
155 | { | |
156 | .callback = dmi_matched, | |
157 | .ident = "Dell Inspiron N311z", | |
158 | .matches = { | |
159 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
160 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"), | |
161 | }, | |
162 | .driver_data = &quirk_dell_vostro_v130, | |
163 | }, | |
164 | { | |
165 | .callback = dmi_matched, | |
166 | .ident = "Dell Inspiron M5110", | |
167 | .matches = { | |
168 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
169 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"), | |
170 | }, | |
171 | .driver_data = &quirk_dell_vostro_v130, | |
172 | }, | |
7f839228 AK |
173 | { |
174 | .callback = dmi_matched, | |
175 | .ident = "Dell Vostro 3360", | |
176 | .matches = { | |
177 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
178 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"), | |
179 | }, | |
180 | .driver_data = &quirk_dell_vostro_v130, | |
181 | }, | |
182 | { | |
183 | .callback = dmi_matched, | |
184 | .ident = "Dell Vostro 3460", | |
185 | .matches = { | |
186 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
187 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"), | |
188 | }, | |
189 | .driver_data = &quirk_dell_vostro_v130, | |
190 | }, | |
191 | { | |
192 | .callback = dmi_matched, | |
193 | .ident = "Dell Vostro 3560", | |
194 | .matches = { | |
195 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
196 | DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"), | |
197 | }, | |
198 | .driver_data = &quirk_dell_vostro_v130, | |
199 | }, | |
d0e0a477 AK |
200 | { |
201 | .callback = dmi_matched, | |
202 | .ident = "Dell Vostro 3450", | |
203 | .matches = { | |
204 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
205 | DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"), | |
206 | }, | |
207 | .driver_data = &quirk_dell_vostro_v130, | |
208 | }, | |
d62d421b | 209 | { } |
2d8b90be AK |
210 | }; |
211 | ||
116ee77b | 212 | static struct calling_interface_buffer *buffer; |
94d8f785 IM |
213 | static struct page *bufferpage; |
214 | static DEFINE_MUTEX(buffer_mutex); | |
116ee77b | 215 | |
c6760ac4 MG |
216 | static int hwswitch_state; |
217 | ||
116ee77b SH |
218 | static void get_buffer(void) |
219 | { | |
220 | mutex_lock(&buffer_mutex); | |
221 | memset(buffer, 0, sizeof(struct calling_interface_buffer)); | |
222 | } | |
223 | ||
224 | static void release_buffer(void) | |
225 | { | |
226 | mutex_unlock(&buffer_mutex); | |
227 | } | |
228 | ||
4788df4c | 229 | static void __init parse_da_table(const struct dmi_header *dm) |
ad8f07cc MG |
230 | { |
231 | /* Final token is a terminator, so we don't want to copy it */ | |
232 | int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1; | |
233 | struct calling_interface_structure *table = | |
234 | container_of(dm, struct calling_interface_structure, header); | |
235 | ||
236 | /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least | |
237 | 6 bytes of entry */ | |
238 | ||
239 | if (dm->length < 17) | |
240 | return; | |
241 | ||
242 | da_command_address = table->cmdIOAddress; | |
243 | da_command_code = table->cmdIOCode; | |
244 | ||
245 | da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * | |
246 | sizeof(struct calling_interface_token), | |
247 | GFP_KERNEL); | |
248 | ||
249 | if (!da_tokens) | |
250 | return; | |
251 | ||
252 | memcpy(da_tokens+da_num_tokens, table->tokens, | |
253 | sizeof(struct calling_interface_token) * tokens); | |
254 | ||
255 | da_num_tokens += tokens; | |
256 | } | |
257 | ||
4788df4c | 258 | static void __init find_tokens(const struct dmi_header *dm, void *dummy) |
ad8f07cc MG |
259 | { |
260 | switch (dm->type) { | |
261 | case 0xd4: /* Indexed IO */ | |
ad8f07cc | 262 | case 0xd5: /* Protected Area Type 1 */ |
ad8f07cc MG |
263 | case 0xd6: /* Protected Area Type 2 */ |
264 | break; | |
265 | case 0xda: /* Calling interface */ | |
266 | parse_da_table(dm); | |
267 | break; | |
268 | } | |
269 | } | |
270 | ||
271 | static int find_token_location(int tokenid) | |
272 | { | |
273 | int i; | |
274 | for (i = 0; i < da_num_tokens; i++) { | |
275 | if (da_tokens[i].tokenID == tokenid) | |
276 | return da_tokens[i].location; | |
277 | } | |
278 | ||
279 | return -1; | |
280 | } | |
281 | ||
282 | static struct calling_interface_buffer * | |
283 | dell_send_request(struct calling_interface_buffer *buffer, int class, | |
284 | int select) | |
285 | { | |
286 | struct smi_cmd command; | |
287 | ||
288 | command.magic = SMI_CMD_MAGIC; | |
289 | command.command_address = da_command_address; | |
290 | command.command_code = da_command_code; | |
291 | command.ebx = virt_to_phys(buffer); | |
292 | command.ecx = 0x42534931; | |
293 | ||
294 | buffer->class = class; | |
295 | buffer->select = select; | |
296 | ||
297 | dcdbas_smi_request(&command); | |
298 | ||
299 | return buffer; | |
300 | } | |
301 | ||
037accfa KYL |
302 | static struct dentry *dell_laptop_dir; |
303 | ||
304 | static int dell_debugfs_show(struct seq_file *s, void *data) | |
305 | { | |
306 | int status; | |
307 | ||
308 | get_buffer(); | |
309 | dell_send_request(buffer, 17, 11); | |
310 | status = buffer->output[1]; | |
311 | release_buffer(); | |
312 | ||
313 | seq_printf(s, "status:\t0x%X\n", status); | |
314 | seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n", | |
315 | status & BIT(0)); | |
316 | seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n", | |
317 | (status & BIT(1)) >> 1); | |
318 | seq_printf(s, "Bit 2 : Wifi is supported: %lu\n", | |
319 | (status & BIT(2)) >> 2); | |
320 | seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n", | |
321 | (status & BIT(3)) >> 3); | |
322 | seq_printf(s, "Bit 4 : WWAN is supported: %lu\n", | |
323 | (status & BIT(4)) >> 4); | |
324 | seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n", | |
325 | (status & BIT(5)) >> 5); | |
326 | seq_printf(s, "Bit 8 : Wifi is installed: %lu\n", | |
327 | (status & BIT(8)) >> 8); | |
328 | seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n", | |
329 | (status & BIT(9)) >> 9); | |
330 | seq_printf(s, "Bit 10: WWAN is installed: %lu\n", | |
331 | (status & BIT(10)) >> 10); | |
332 | seq_printf(s, "Bit 16: Hardware switch is on: %lu\n", | |
333 | (status & BIT(16)) >> 16); | |
334 | seq_printf(s, "Bit 17: Wifi is blocked: %lu\n", | |
335 | (status & BIT(17)) >> 17); | |
336 | seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n", | |
337 | (status & BIT(18)) >> 18); | |
338 | seq_printf(s, "Bit 19: WWAN is blocked: %lu\n", | |
339 | (status & BIT(19)) >> 19); | |
340 | ||
341 | seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state); | |
342 | seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n", | |
343 | hwswitch_state & BIT(0)); | |
344 | seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n", | |
345 | (hwswitch_state & BIT(1)) >> 1); | |
346 | seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n", | |
347 | (hwswitch_state & BIT(2)) >> 2); | |
348 | seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n", | |
349 | (hwswitch_state & BIT(7)) >> 7); | |
350 | seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n", | |
351 | (hwswitch_state & BIT(8)) >> 8); | |
352 | seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n", | |
353 | (hwswitch_state & BIT(15)) >> 15); | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | static int dell_debugfs_open(struct inode *inode, struct file *file) | |
359 | { | |
360 | return single_open(file, dell_debugfs_show, inode->i_private); | |
361 | } | |
362 | ||
363 | static const struct file_operations dell_debugfs_fops = { | |
364 | .owner = THIS_MODULE, | |
365 | .open = dell_debugfs_open, | |
366 | .read = seq_read, | |
367 | .llseek = seq_lseek, | |
368 | .release = single_release, | |
369 | }; | |
370 | ||
ad8f07cc MG |
371 | static int dell_send_intensity(struct backlight_device *bd) |
372 | { | |
116ee77b | 373 | int ret = 0; |
ad8f07cc | 374 | |
116ee77b SH |
375 | get_buffer(); |
376 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
377 | buffer->input[1] = bd->props.brightness; | |
ad8f07cc | 378 | |
116ee77b SH |
379 | if (buffer->input[0] == -1) { |
380 | ret = -ENODEV; | |
381 | goto out; | |
382 | } | |
ad8f07cc MG |
383 | |
384 | if (power_supply_is_system_supplied() > 0) | |
116ee77b | 385 | dell_send_request(buffer, 1, 2); |
ad8f07cc | 386 | else |
116ee77b | 387 | dell_send_request(buffer, 1, 1); |
ad8f07cc | 388 | |
116ee77b SH |
389 | out: |
390 | release_buffer(); | |
ad8f07cc MG |
391 | return 0; |
392 | } | |
393 | ||
394 | static int dell_get_intensity(struct backlight_device *bd) | |
395 | { | |
116ee77b | 396 | int ret = 0; |
ad8f07cc | 397 | |
116ee77b SH |
398 | get_buffer(); |
399 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
ad8f07cc | 400 | |
116ee77b SH |
401 | if (buffer->input[0] == -1) { |
402 | ret = -ENODEV; | |
403 | goto out; | |
404 | } | |
ad8f07cc MG |
405 | |
406 | if (power_supply_is_system_supplied() > 0) | |
116ee77b | 407 | dell_send_request(buffer, 0, 2); |
ad8f07cc | 408 | else |
116ee77b | 409 | dell_send_request(buffer, 0, 1); |
ad8f07cc | 410 | |
b486742a JA |
411 | ret = buffer->output[1]; |
412 | ||
116ee77b SH |
413 | out: |
414 | release_buffer(); | |
b486742a | 415 | return ret; |
ad8f07cc MG |
416 | } |
417 | ||
acc2472e | 418 | static const struct backlight_ops dell_ops = { |
ad8f07cc MG |
419 | .get_brightness = dell_get_intensity, |
420 | .update_status = dell_send_intensity, | |
421 | }; | |
422 | ||
869f8dfa | 423 | static void touchpad_led_on(void) |
2d8b90be AK |
424 | { |
425 | int command = 0x97; | |
426 | char data = 1; | |
427 | i8042_command(&data, command | 1 << 12); | |
428 | } | |
429 | ||
869f8dfa | 430 | static void touchpad_led_off(void) |
2d8b90be AK |
431 | { |
432 | int command = 0x97; | |
433 | char data = 2; | |
434 | i8042_command(&data, command | 1 << 12); | |
435 | } | |
436 | ||
437 | static void touchpad_led_set(struct led_classdev *led_cdev, | |
438 | enum led_brightness value) | |
439 | { | |
440 | if (value > 0) | |
441 | touchpad_led_on(); | |
442 | else | |
443 | touchpad_led_off(); | |
444 | } | |
445 | ||
446 | static struct led_classdev touchpad_led = { | |
447 | .name = "dell-laptop::touchpad", | |
448 | .brightness_set = touchpad_led_set, | |
2d5de9e8 | 449 | .flags = LED_CORE_SUSPENDRESUME, |
2d8b90be AK |
450 | }; |
451 | ||
452 | static int __devinit touchpad_led_init(struct device *dev) | |
453 | { | |
454 | return led_classdev_register(dev, &touchpad_led); | |
455 | } | |
456 | ||
457 | static void touchpad_led_exit(void) | |
458 | { | |
459 | led_classdev_unregister(&touchpad_led); | |
460 | } | |
461 | ||
ad8f07cc MG |
462 | static int __init dell_init(void) |
463 | { | |
ad8f07cc MG |
464 | int max_intensity = 0; |
465 | int ret; | |
466 | ||
467 | if (!dmi_check_system(dell_device_table)) | |
468 | return -ENODEV; | |
469 | ||
2d8b90be AK |
470 | quirks = NULL; |
471 | /* find if this machine support other functions */ | |
472 | dmi_check_system(dell_quirks); | |
473 | ||
e7a19c56 | 474 | dmi_walk(find_tokens, NULL); |
ad8f07cc MG |
475 | |
476 | if (!da_tokens) { | |
eb889524 | 477 | pr_info("Unable to find dmi tokens\n"); |
ad8f07cc MG |
478 | return -ENODEV; |
479 | } | |
480 | ||
ada3248a AJ |
481 | ret = platform_driver_register(&platform_driver); |
482 | if (ret) | |
483 | goto fail_platform_driver; | |
484 | platform_device = platform_device_alloc("dell-laptop", -1); | |
485 | if (!platform_device) { | |
486 | ret = -ENOMEM; | |
487 | goto fail_platform_device1; | |
488 | } | |
489 | ret = platform_device_add(platform_device); | |
490 | if (ret) | |
491 | goto fail_platform_device2; | |
492 | ||
116ee77b SH |
493 | /* |
494 | * Allocate buffer below 4GB for SMI data--only 32-bit physical addr | |
495 | * is passed to SMI handler. | |
496 | */ | |
497 | bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32); | |
498 | ||
499 | if (!bufferpage) | |
500 | goto fail_buffer; | |
501 | buffer = page_address(bufferpage); | |
116ee77b | 502 | |
2d8b90be AK |
503 | if (quirks && quirks->touchpad_led) |
504 | touchpad_led_init(&platform_device->dev); | |
505 | ||
037accfa | 506 | dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL); |
037accfa | 507 | |
ad8f07cc MG |
508 | #ifdef CONFIG_ACPI |
509 | /* In the event of an ACPI backlight being available, don't | |
510 | * register the platform controller. | |
511 | */ | |
512 | if (acpi_video_backlight_support()) | |
513 | return 0; | |
514 | #endif | |
515 | ||
116ee77b SH |
516 | get_buffer(); |
517 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
518 | if (buffer->input[0] != -1) { | |
519 | dell_send_request(buffer, 0, 2); | |
520 | max_intensity = buffer->output[3]; | |
ad8f07cc | 521 | } |
116ee77b | 522 | release_buffer(); |
ad8f07cc MG |
523 | |
524 | if (max_intensity) { | |
a19a6ee6 MG |
525 | struct backlight_properties props; |
526 | memset(&props, 0, sizeof(struct backlight_properties)); | |
bb7ca747 | 527 | props.type = BACKLIGHT_PLATFORM; |
a19a6ee6 MG |
528 | props.max_brightness = max_intensity; |
529 | dell_backlight_device = backlight_device_register("dell_backlight", | |
530 | &platform_device->dev, | |
531 | NULL, | |
532 | &dell_ops, | |
533 | &props); | |
ad8f07cc MG |
534 | |
535 | if (IS_ERR(dell_backlight_device)) { | |
536 | ret = PTR_ERR(dell_backlight_device); | |
537 | dell_backlight_device = NULL; | |
71e9dc73 | 538 | goto fail_backlight; |
ad8f07cc MG |
539 | } |
540 | ||
ad8f07cc MG |
541 | dell_backlight_device->props.brightness = |
542 | dell_get_intensity(dell_backlight_device); | |
543 | backlight_update_status(dell_backlight_device); | |
544 | } | |
545 | ||
546 | return 0; | |
71e9dc73 AJ |
547 | |
548 | fail_backlight: | |
116ee77b SH |
549 | free_page((unsigned long)bufferpage); |
550 | fail_buffer: | |
ada3248a AJ |
551 | platform_device_del(platform_device); |
552 | fail_platform_device2: | |
553 | platform_device_put(platform_device); | |
554 | fail_platform_device1: | |
555 | platform_driver_unregister(&platform_driver); | |
556 | fail_platform_driver: | |
ad8f07cc MG |
557 | kfree(da_tokens); |
558 | return ret; | |
559 | } | |
560 | ||
561 | static void __exit dell_exit(void) | |
562 | { | |
037accfa | 563 | debugfs_remove_recursive(dell_laptop_dir); |
2d8b90be AK |
564 | if (quirks && quirks->touchpad_led) |
565 | touchpad_led_exit(); | |
ad8f07cc | 566 | backlight_device_unregister(dell_backlight_device); |
facd61d7 | 567 | if (platform_device) { |
92e00e47 | 568 | platform_device_unregister(platform_device); |
facd61d7 MG |
569 | platform_driver_unregister(&platform_driver); |
570 | } | |
e551260b | 571 | kfree(da_tokens); |
116ee77b | 572 | free_page((unsigned long)buffer); |
ad8f07cc MG |
573 | } |
574 | ||
575 | module_init(dell_init); | |
576 | module_exit(dell_exit); | |
577 | ||
578 | MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); | |
579 | MODULE_DESCRIPTION("Dell laptop driver"); | |
580 | MODULE_LICENSE("GPL"); |