Commit | Line | Data |
---|---|---|
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 | |
b859f159 | 118 | static struct dmi_system_id dell_quirks[] = { |
2d8b90be AK |
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 | }, | |
5f1e88f4 AK |
209 | { |
210 | .callback = dmi_matched, | |
211 | .ident = "Dell Inspiron 5420", | |
212 | .matches = { | |
213 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
a2174ba2 | 214 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"), |
5f1e88f4 AK |
215 | }, |
216 | .driver_data = &quirk_dell_vostro_v130, | |
217 | }, | |
218 | { | |
219 | .callback = dmi_matched, | |
220 | .ident = "Dell Inspiron 5520", | |
221 | .matches = { | |
222 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
a2174ba2 | 223 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"), |
5f1e88f4 AK |
224 | }, |
225 | .driver_data = &quirk_dell_vostro_v130, | |
226 | }, | |
227 | { | |
228 | .callback = dmi_matched, | |
229 | .ident = "Dell Inspiron 5720", | |
230 | .matches = { | |
231 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
a2174ba2 | 232 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"), |
5f1e88f4 AK |
233 | }, |
234 | .driver_data = &quirk_dell_vostro_v130, | |
235 | }, | |
236 | { | |
237 | .callback = dmi_matched, | |
238 | .ident = "Dell Inspiron 7420", | |
239 | .matches = { | |
240 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
a2174ba2 | 241 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"), |
5f1e88f4 AK |
242 | }, |
243 | .driver_data = &quirk_dell_vostro_v130, | |
244 | }, | |
245 | { | |
246 | .callback = dmi_matched, | |
247 | .ident = "Dell Inspiron 7520", | |
248 | .matches = { | |
249 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
a2174ba2 | 250 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"), |
5f1e88f4 AK |
251 | }, |
252 | .driver_data = &quirk_dell_vostro_v130, | |
253 | }, | |
254 | { | |
255 | .callback = dmi_matched, | |
256 | .ident = "Dell Inspiron 7720", | |
257 | .matches = { | |
258 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
a2174ba2 | 259 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"), |
5f1e88f4 AK |
260 | }, |
261 | .driver_data = &quirk_dell_vostro_v130, | |
262 | }, | |
d62d421b | 263 | { } |
2d8b90be AK |
264 | }; |
265 | ||
116ee77b | 266 | static struct calling_interface_buffer *buffer; |
94d8f785 IM |
267 | static struct page *bufferpage; |
268 | static DEFINE_MUTEX(buffer_mutex); | |
116ee77b | 269 | |
c6760ac4 MG |
270 | static int hwswitch_state; |
271 | ||
116ee77b SH |
272 | static void get_buffer(void) |
273 | { | |
274 | mutex_lock(&buffer_mutex); | |
275 | memset(buffer, 0, sizeof(struct calling_interface_buffer)); | |
276 | } | |
277 | ||
278 | static void release_buffer(void) | |
279 | { | |
280 | mutex_unlock(&buffer_mutex); | |
281 | } | |
282 | ||
4788df4c | 283 | static void __init parse_da_table(const struct dmi_header *dm) |
ad8f07cc MG |
284 | { |
285 | /* Final token is a terminator, so we don't want to copy it */ | |
286 | int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1; | |
fe9ab00f | 287 | struct calling_interface_token *new_da_tokens; |
ad8f07cc MG |
288 | struct calling_interface_structure *table = |
289 | container_of(dm, struct calling_interface_structure, header); | |
290 | ||
291 | /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least | |
292 | 6 bytes of entry */ | |
293 | ||
294 | if (dm->length < 17) | |
295 | return; | |
296 | ||
297 | da_command_address = table->cmdIOAddress; | |
298 | da_command_code = table->cmdIOCode; | |
299 | ||
fe9ab00f DW |
300 | new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * |
301 | sizeof(struct calling_interface_token), | |
302 | GFP_KERNEL); | |
ad8f07cc | 303 | |
fe9ab00f | 304 | if (!new_da_tokens) |
ad8f07cc | 305 | return; |
fe9ab00f | 306 | da_tokens = new_da_tokens; |
ad8f07cc MG |
307 | |
308 | memcpy(da_tokens+da_num_tokens, table->tokens, | |
309 | sizeof(struct calling_interface_token) * tokens); | |
310 | ||
311 | da_num_tokens += tokens; | |
312 | } | |
313 | ||
4788df4c | 314 | static void __init find_tokens(const struct dmi_header *dm, void *dummy) |
ad8f07cc MG |
315 | { |
316 | switch (dm->type) { | |
317 | case 0xd4: /* Indexed IO */ | |
ad8f07cc | 318 | case 0xd5: /* Protected Area Type 1 */ |
ad8f07cc MG |
319 | case 0xd6: /* Protected Area Type 2 */ |
320 | break; | |
321 | case 0xda: /* Calling interface */ | |
322 | parse_da_table(dm); | |
323 | break; | |
324 | } | |
325 | } | |
326 | ||
327 | static int find_token_location(int tokenid) | |
328 | { | |
329 | int i; | |
330 | for (i = 0; i < da_num_tokens; i++) { | |
331 | if (da_tokens[i].tokenID == tokenid) | |
332 | return da_tokens[i].location; | |
333 | } | |
334 | ||
335 | return -1; | |
336 | } | |
337 | ||
338 | static struct calling_interface_buffer * | |
339 | dell_send_request(struct calling_interface_buffer *buffer, int class, | |
340 | int select) | |
341 | { | |
342 | struct smi_cmd command; | |
343 | ||
344 | command.magic = SMI_CMD_MAGIC; | |
345 | command.command_address = da_command_address; | |
346 | command.command_code = da_command_code; | |
347 | command.ebx = virt_to_phys(buffer); | |
348 | command.ecx = 0x42534931; | |
349 | ||
350 | buffer->class = class; | |
351 | buffer->select = select; | |
352 | ||
353 | dcdbas_smi_request(&command); | |
354 | ||
355 | return buffer; | |
356 | } | |
357 | ||
037accfa KYL |
358 | static struct dentry *dell_laptop_dir; |
359 | ||
360 | static int dell_debugfs_show(struct seq_file *s, void *data) | |
361 | { | |
362 | int status; | |
363 | ||
364 | get_buffer(); | |
365 | dell_send_request(buffer, 17, 11); | |
366 | status = buffer->output[1]; | |
367 | release_buffer(); | |
368 | ||
369 | seq_printf(s, "status:\t0x%X\n", status); | |
370 | seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n", | |
371 | status & BIT(0)); | |
372 | seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n", | |
373 | (status & BIT(1)) >> 1); | |
374 | seq_printf(s, "Bit 2 : Wifi is supported: %lu\n", | |
375 | (status & BIT(2)) >> 2); | |
376 | seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n", | |
377 | (status & BIT(3)) >> 3); | |
378 | seq_printf(s, "Bit 4 : WWAN is supported: %lu\n", | |
379 | (status & BIT(4)) >> 4); | |
380 | seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n", | |
381 | (status & BIT(5)) >> 5); | |
382 | seq_printf(s, "Bit 8 : Wifi is installed: %lu\n", | |
383 | (status & BIT(8)) >> 8); | |
384 | seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n", | |
385 | (status & BIT(9)) >> 9); | |
386 | seq_printf(s, "Bit 10: WWAN is installed: %lu\n", | |
387 | (status & BIT(10)) >> 10); | |
388 | seq_printf(s, "Bit 16: Hardware switch is on: %lu\n", | |
389 | (status & BIT(16)) >> 16); | |
390 | seq_printf(s, "Bit 17: Wifi is blocked: %lu\n", | |
391 | (status & BIT(17)) >> 17); | |
392 | seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n", | |
393 | (status & BIT(18)) >> 18); | |
394 | seq_printf(s, "Bit 19: WWAN is blocked: %lu\n", | |
395 | (status & BIT(19)) >> 19); | |
396 | ||
397 | seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state); | |
398 | seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n", | |
399 | hwswitch_state & BIT(0)); | |
400 | seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n", | |
401 | (hwswitch_state & BIT(1)) >> 1); | |
402 | seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n", | |
403 | (hwswitch_state & BIT(2)) >> 2); | |
404 | seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n", | |
405 | (hwswitch_state & BIT(7)) >> 7); | |
406 | seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n", | |
407 | (hwswitch_state & BIT(8)) >> 8); | |
408 | seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n", | |
409 | (hwswitch_state & BIT(15)) >> 15); | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
414 | static int dell_debugfs_open(struct inode *inode, struct file *file) | |
415 | { | |
416 | return single_open(file, dell_debugfs_show, inode->i_private); | |
417 | } | |
418 | ||
419 | static const struct file_operations dell_debugfs_fops = { | |
420 | .owner = THIS_MODULE, | |
421 | .open = dell_debugfs_open, | |
422 | .read = seq_read, | |
423 | .llseek = seq_lseek, | |
424 | .release = single_release, | |
425 | }; | |
426 | ||
ad8f07cc MG |
427 | static int dell_send_intensity(struct backlight_device *bd) |
428 | { | |
116ee77b | 429 | int ret = 0; |
ad8f07cc | 430 | |
116ee77b SH |
431 | get_buffer(); |
432 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
433 | buffer->input[1] = bd->props.brightness; | |
ad8f07cc | 434 | |
116ee77b SH |
435 | if (buffer->input[0] == -1) { |
436 | ret = -ENODEV; | |
437 | goto out; | |
438 | } | |
ad8f07cc MG |
439 | |
440 | if (power_supply_is_system_supplied() > 0) | |
116ee77b | 441 | dell_send_request(buffer, 1, 2); |
ad8f07cc | 442 | else |
116ee77b | 443 | dell_send_request(buffer, 1, 1); |
ad8f07cc | 444 | |
116ee77b SH |
445 | out: |
446 | release_buffer(); | |
ad8f07cc MG |
447 | return 0; |
448 | } | |
449 | ||
450 | static int dell_get_intensity(struct backlight_device *bd) | |
451 | { | |
116ee77b | 452 | int ret = 0; |
ad8f07cc | 453 | |
116ee77b SH |
454 | get_buffer(); |
455 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
ad8f07cc | 456 | |
116ee77b SH |
457 | if (buffer->input[0] == -1) { |
458 | ret = -ENODEV; | |
459 | goto out; | |
460 | } | |
ad8f07cc MG |
461 | |
462 | if (power_supply_is_system_supplied() > 0) | |
116ee77b | 463 | dell_send_request(buffer, 0, 2); |
ad8f07cc | 464 | else |
116ee77b | 465 | dell_send_request(buffer, 0, 1); |
ad8f07cc | 466 | |
b486742a JA |
467 | ret = buffer->output[1]; |
468 | ||
116ee77b SH |
469 | out: |
470 | release_buffer(); | |
b486742a | 471 | return ret; |
ad8f07cc MG |
472 | } |
473 | ||
acc2472e | 474 | static const struct backlight_ops dell_ops = { |
ad8f07cc MG |
475 | .get_brightness = dell_get_intensity, |
476 | .update_status = dell_send_intensity, | |
477 | }; | |
478 | ||
869f8dfa | 479 | static void touchpad_led_on(void) |
2d8b90be AK |
480 | { |
481 | int command = 0x97; | |
482 | char data = 1; | |
483 | i8042_command(&data, command | 1 << 12); | |
484 | } | |
485 | ||
869f8dfa | 486 | static void touchpad_led_off(void) |
2d8b90be AK |
487 | { |
488 | int command = 0x97; | |
489 | char data = 2; | |
490 | i8042_command(&data, command | 1 << 12); | |
491 | } | |
492 | ||
493 | static void touchpad_led_set(struct led_classdev *led_cdev, | |
494 | enum led_brightness value) | |
495 | { | |
496 | if (value > 0) | |
497 | touchpad_led_on(); | |
498 | else | |
499 | touchpad_led_off(); | |
500 | } | |
501 | ||
502 | static struct led_classdev touchpad_led = { | |
503 | .name = "dell-laptop::touchpad", | |
504 | .brightness_set = touchpad_led_set, | |
2d5de9e8 | 505 | .flags = LED_CORE_SUSPENDRESUME, |
2d8b90be AK |
506 | }; |
507 | ||
b859f159 | 508 | static int touchpad_led_init(struct device *dev) |
2d8b90be AK |
509 | { |
510 | return led_classdev_register(dev, &touchpad_led); | |
511 | } | |
512 | ||
513 | static void touchpad_led_exit(void) | |
514 | { | |
515 | led_classdev_unregister(&touchpad_led); | |
516 | } | |
517 | ||
ad8f07cc MG |
518 | static int __init dell_init(void) |
519 | { | |
ad8f07cc MG |
520 | int max_intensity = 0; |
521 | int ret; | |
522 | ||
523 | if (!dmi_check_system(dell_device_table)) | |
524 | return -ENODEV; | |
525 | ||
2d8b90be AK |
526 | quirks = NULL; |
527 | /* find if this machine support other functions */ | |
528 | dmi_check_system(dell_quirks); | |
529 | ||
e7a19c56 | 530 | dmi_walk(find_tokens, NULL); |
ad8f07cc MG |
531 | |
532 | if (!da_tokens) { | |
eb889524 | 533 | pr_info("Unable to find dmi tokens\n"); |
ad8f07cc MG |
534 | return -ENODEV; |
535 | } | |
536 | ||
ada3248a AJ |
537 | ret = platform_driver_register(&platform_driver); |
538 | if (ret) | |
539 | goto fail_platform_driver; | |
540 | platform_device = platform_device_alloc("dell-laptop", -1); | |
541 | if (!platform_device) { | |
542 | ret = -ENOMEM; | |
543 | goto fail_platform_device1; | |
544 | } | |
545 | ret = platform_device_add(platform_device); | |
546 | if (ret) | |
547 | goto fail_platform_device2; | |
548 | ||
116ee77b SH |
549 | /* |
550 | * Allocate buffer below 4GB for SMI data--only 32-bit physical addr | |
551 | * is passed to SMI handler. | |
552 | */ | |
553 | bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32); | |
554 | ||
555 | if (!bufferpage) | |
556 | goto fail_buffer; | |
557 | buffer = page_address(bufferpage); | |
116ee77b | 558 | |
2d8b90be AK |
559 | if (quirks && quirks->touchpad_led) |
560 | touchpad_led_init(&platform_device->dev); | |
561 | ||
037accfa | 562 | dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL); |
037accfa | 563 | |
ad8f07cc MG |
564 | #ifdef CONFIG_ACPI |
565 | /* In the event of an ACPI backlight being available, don't | |
566 | * register the platform controller. | |
567 | */ | |
568 | if (acpi_video_backlight_support()) | |
569 | return 0; | |
570 | #endif | |
571 | ||
116ee77b SH |
572 | get_buffer(); |
573 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
574 | if (buffer->input[0] != -1) { | |
575 | dell_send_request(buffer, 0, 2); | |
576 | max_intensity = buffer->output[3]; | |
ad8f07cc | 577 | } |
116ee77b | 578 | release_buffer(); |
ad8f07cc MG |
579 | |
580 | if (max_intensity) { | |
a19a6ee6 MG |
581 | struct backlight_properties props; |
582 | memset(&props, 0, sizeof(struct backlight_properties)); | |
bb7ca747 | 583 | props.type = BACKLIGHT_PLATFORM; |
a19a6ee6 MG |
584 | props.max_brightness = max_intensity; |
585 | dell_backlight_device = backlight_device_register("dell_backlight", | |
586 | &platform_device->dev, | |
587 | NULL, | |
588 | &dell_ops, | |
589 | &props); | |
ad8f07cc MG |
590 | |
591 | if (IS_ERR(dell_backlight_device)) { | |
592 | ret = PTR_ERR(dell_backlight_device); | |
593 | dell_backlight_device = NULL; | |
71e9dc73 | 594 | goto fail_backlight; |
ad8f07cc MG |
595 | } |
596 | ||
ad8f07cc MG |
597 | dell_backlight_device->props.brightness = |
598 | dell_get_intensity(dell_backlight_device); | |
599 | backlight_update_status(dell_backlight_device); | |
600 | } | |
601 | ||
602 | return 0; | |
71e9dc73 AJ |
603 | |
604 | fail_backlight: | |
116ee77b SH |
605 | free_page((unsigned long)bufferpage); |
606 | fail_buffer: | |
ada3248a AJ |
607 | platform_device_del(platform_device); |
608 | fail_platform_device2: | |
609 | platform_device_put(platform_device); | |
610 | fail_platform_device1: | |
611 | platform_driver_unregister(&platform_driver); | |
612 | fail_platform_driver: | |
ad8f07cc MG |
613 | kfree(da_tokens); |
614 | return ret; | |
615 | } | |
616 | ||
617 | static void __exit dell_exit(void) | |
618 | { | |
037accfa | 619 | debugfs_remove_recursive(dell_laptop_dir); |
2d8b90be AK |
620 | if (quirks && quirks->touchpad_led) |
621 | touchpad_led_exit(); | |
ad8f07cc | 622 | backlight_device_unregister(dell_backlight_device); |
facd61d7 | 623 | if (platform_device) { |
92e00e47 | 624 | platform_device_unregister(platform_device); |
facd61d7 MG |
625 | platform_driver_unregister(&platform_driver); |
626 | } | |
e551260b | 627 | kfree(da_tokens); |
116ee77b | 628 | free_page((unsigned long)buffer); |
ad8f07cc MG |
629 | } |
630 | ||
631 | module_init(dell_init); | |
632 | module_exit(dell_exit); | |
633 | ||
634 | MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); | |
635 | MODULE_DESCRIPTION("Dell laptop driver"); | |
636 | MODULE_LICENSE("GPL"); |