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 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/backlight.h> | |
19 | #include <linux/err.h> | |
20 | #include <linux/dmi.h> | |
21 | #include <linux/io.h> | |
22 | #include <linux/rfkill.h> | |
23 | #include <linux/power_supply.h> | |
24 | #include <linux/acpi.h> | |
116ee77b | 25 | #include <linux/mm.h> |
814cb8ad | 26 | #include <linux/i8042.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
037accfa KYL |
28 | #include <linux/debugfs.h> |
29 | #include <linux/seq_file.h> | |
cad73120 | 30 | #include "../../firmware/dcdbas.h" |
ad8f07cc MG |
31 | |
32 | #define BRIGHTNESS_TOKEN 0x7d | |
33 | ||
34 | /* This structure will be modified by the firmware when we enter | |
35 | * system management mode, hence the volatiles */ | |
36 | ||
37 | struct calling_interface_buffer { | |
38 | u16 class; | |
39 | u16 select; | |
40 | volatile u32 input[4]; | |
41 | volatile u32 output[4]; | |
42 | } __packed; | |
43 | ||
44 | struct calling_interface_token { | |
45 | u16 tokenID; | |
46 | u16 location; | |
47 | union { | |
48 | u16 value; | |
49 | u16 stringlength; | |
50 | }; | |
51 | }; | |
52 | ||
53 | struct calling_interface_structure { | |
54 | struct dmi_header header; | |
55 | u16 cmdIOAddress; | |
56 | u8 cmdIOCode; | |
57 | u32 supportedCmds; | |
58 | struct calling_interface_token tokens[]; | |
59 | } __packed; | |
60 | ||
61 | static int da_command_address; | |
62 | static int da_command_code; | |
63 | static int da_num_tokens; | |
64 | static struct calling_interface_token *da_tokens; | |
65 | ||
ada3248a AJ |
66 | static struct platform_driver platform_driver = { |
67 | .driver = { | |
68 | .name = "dell-laptop", | |
69 | .owner = THIS_MODULE, | |
70 | } | |
71 | }; | |
72 | ||
73 | static struct platform_device *platform_device; | |
ad8f07cc MG |
74 | static struct backlight_device *dell_backlight_device; |
75 | static struct rfkill *wifi_rfkill; | |
76 | static struct rfkill *bluetooth_rfkill; | |
77 | static struct rfkill *wwan_rfkill; | |
78 | ||
79 | static const struct dmi_system_id __initdata dell_device_table[] = { | |
80 | { | |
81 | .ident = "Dell laptop", | |
82 | .matches = { | |
83 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
84 | DMI_MATCH(DMI_CHASSIS_TYPE, "8"), | |
85 | }, | |
86 | }, | |
410d44c7 RK |
87 | { |
88 | .matches = { | |
89 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
90 | DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/ | |
91 | }, | |
92 | }, | |
cb6a7937 EA |
93 | { |
94 | .ident = "Dell Computer Corporation", | |
95 | .matches = { | |
96 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
97 | DMI_MATCH(DMI_CHASSIS_TYPE, "8"), | |
98 | }, | |
99 | }, | |
ad8f07cc MG |
100 | { } |
101 | }; | |
102 | ||
e5fefd0c ML |
103 | static struct dmi_system_id __devinitdata dell_blacklist[] = { |
104 | /* Supported by compal-laptop */ | |
105 | { | |
106 | .ident = "Dell Mini 9", | |
107 | .matches = { | |
108 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
109 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"), | |
110 | }, | |
111 | }, | |
112 | { | |
113 | .ident = "Dell Mini 10", | |
114 | .matches = { | |
115 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
116 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"), | |
117 | }, | |
118 | }, | |
119 | { | |
120 | .ident = "Dell Mini 10v", | |
121 | .matches = { | |
122 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
123 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"), | |
124 | }, | |
125 | }, | |
c3f755e3 VE |
126 | { |
127 | .ident = "Dell Mini 1012", | |
128 | .matches = { | |
129 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
130 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"), | |
131 | }, | |
132 | }, | |
e5fefd0c ML |
133 | { |
134 | .ident = "Dell Inspiron 11z", | |
135 | .matches = { | |
136 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
137 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"), | |
138 | }, | |
139 | }, | |
140 | { | |
141 | .ident = "Dell Mini 12", | |
142 | .matches = { | |
143 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
144 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"), | |
145 | }, | |
146 | }, | |
147 | {} | |
148 | }; | |
149 | ||
116ee77b | 150 | static struct calling_interface_buffer *buffer; |
94d8f785 IM |
151 | static struct page *bufferpage; |
152 | static DEFINE_MUTEX(buffer_mutex); | |
116ee77b | 153 | |
c6760ac4 MG |
154 | static int hwswitch_state; |
155 | ||
116ee77b SH |
156 | static void get_buffer(void) |
157 | { | |
158 | mutex_lock(&buffer_mutex); | |
159 | memset(buffer, 0, sizeof(struct calling_interface_buffer)); | |
160 | } | |
161 | ||
162 | static void release_buffer(void) | |
163 | { | |
164 | mutex_unlock(&buffer_mutex); | |
165 | } | |
166 | ||
4788df4c | 167 | static void __init parse_da_table(const struct dmi_header *dm) |
ad8f07cc MG |
168 | { |
169 | /* Final token is a terminator, so we don't want to copy it */ | |
170 | int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1; | |
171 | struct calling_interface_structure *table = | |
172 | container_of(dm, struct calling_interface_structure, header); | |
173 | ||
174 | /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least | |
175 | 6 bytes of entry */ | |
176 | ||
177 | if (dm->length < 17) | |
178 | return; | |
179 | ||
180 | da_command_address = table->cmdIOAddress; | |
181 | da_command_code = table->cmdIOCode; | |
182 | ||
183 | da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * | |
184 | sizeof(struct calling_interface_token), | |
185 | GFP_KERNEL); | |
186 | ||
187 | if (!da_tokens) | |
188 | return; | |
189 | ||
190 | memcpy(da_tokens+da_num_tokens, table->tokens, | |
191 | sizeof(struct calling_interface_token) * tokens); | |
192 | ||
193 | da_num_tokens += tokens; | |
194 | } | |
195 | ||
4788df4c | 196 | static void __init find_tokens(const struct dmi_header *dm, void *dummy) |
ad8f07cc MG |
197 | { |
198 | switch (dm->type) { | |
199 | case 0xd4: /* Indexed IO */ | |
200 | break; | |
201 | case 0xd5: /* Protected Area Type 1 */ | |
202 | break; | |
203 | case 0xd6: /* Protected Area Type 2 */ | |
204 | break; | |
205 | case 0xda: /* Calling interface */ | |
206 | parse_da_table(dm); | |
207 | break; | |
208 | } | |
209 | } | |
210 | ||
211 | static int find_token_location(int tokenid) | |
212 | { | |
213 | int i; | |
214 | for (i = 0; i < da_num_tokens; i++) { | |
215 | if (da_tokens[i].tokenID == tokenid) | |
216 | return da_tokens[i].location; | |
217 | } | |
218 | ||
219 | return -1; | |
220 | } | |
221 | ||
222 | static struct calling_interface_buffer * | |
223 | dell_send_request(struct calling_interface_buffer *buffer, int class, | |
224 | int select) | |
225 | { | |
226 | struct smi_cmd command; | |
227 | ||
228 | command.magic = SMI_CMD_MAGIC; | |
229 | command.command_address = da_command_address; | |
230 | command.command_code = da_command_code; | |
231 | command.ebx = virt_to_phys(buffer); | |
232 | command.ecx = 0x42534931; | |
233 | ||
234 | buffer->class = class; | |
235 | buffer->select = select; | |
236 | ||
237 | dcdbas_smi_request(&command); | |
238 | ||
239 | return buffer; | |
240 | } | |
241 | ||
242 | /* Derived from information in DellWirelessCtl.cpp: | |
243 | Class 17, select 11 is radio control. It returns an array of 32-bit values. | |
244 | ||
c6760ac4 MG |
245 | Input byte 0 = 0: Wireless information |
246 | ||
ad8f07cc MG |
247 | result[0]: return code |
248 | result[1]: | |
249 | Bit 0: Hardware switch supported | |
250 | Bit 1: Wifi locator supported | |
251 | Bit 2: Wifi is supported | |
252 | Bit 3: Bluetooth is supported | |
253 | Bit 4: WWAN is supported | |
254 | Bit 5: Wireless keyboard supported | |
255 | Bits 6-7: Reserved | |
256 | Bit 8: Wifi is installed | |
257 | Bit 9: Bluetooth is installed | |
258 | Bit 10: WWAN is installed | |
259 | Bits 11-15: Reserved | |
260 | Bit 16: Hardware switch is on | |
261 | Bit 17: Wifi is blocked | |
262 | Bit 18: Bluetooth is blocked | |
263 | Bit 19: WWAN is blocked | |
264 | Bits 20-31: Reserved | |
265 | result[2]: NVRAM size in bytes | |
266 | result[3]: NVRAM format version number | |
c6760ac4 MG |
267 | |
268 | Input byte 0 = 2: Wireless switch configuration | |
269 | result[0]: return code | |
270 | result[1]: | |
271 | Bit 0: Wifi controlled by switch | |
272 | Bit 1: Bluetooth controlled by switch | |
273 | Bit 2: WWAN controlled by switch | |
274 | Bits 3-6: Reserved | |
275 | Bit 7: Wireless switch config locked | |
276 | Bit 8: Wifi locator enabled | |
277 | Bits 9-14: Reserved | |
278 | Bit 15: Wifi locator setting locked | |
279 | Bits 16-31: Reserved | |
ad8f07cc MG |
280 | */ |
281 | ||
19d337df | 282 | static int dell_rfkill_set(void *data, bool blocked) |
ad8f07cc | 283 | { |
624f0de4 | 284 | int disable = blocked ? 1 : 0; |
19d337df | 285 | unsigned long radio = (unsigned long)data; |
c6760ac4 | 286 | int hwswitch_bit = (unsigned long)data - 1; |
116ee77b | 287 | int ret = 0; |
ad8f07cc | 288 | |
116ee77b SH |
289 | get_buffer(); |
290 | dell_send_request(buffer, 17, 11); | |
ec1722a2 | 291 | |
c6760ac4 | 292 | /* If the hardware switch controls this radio, and the hardware |
a3d77411 KYL |
293 | switch is disabled, don't allow changing the software state. |
294 | If the hardware switch is reported as not supported, always | |
295 | fire the SMI to toggle the killswitch. */ | |
c6760ac4 | 296 | if ((hwswitch_state & BIT(hwswitch_bit)) && |
a3d77411 KYL |
297 | !(buffer->output[1] & BIT(16)) && |
298 | (buffer->output[1] & BIT(0))) { | |
116ee77b SH |
299 | ret = -EINVAL; |
300 | goto out; | |
301 | } | |
ad8f07cc | 302 | |
116ee77b SH |
303 | buffer->input[0] = (1 | (radio<<8) | (disable << 16)); |
304 | dell_send_request(buffer, 17, 11); | |
305 | ||
306 | out: | |
307 | release_buffer(); | |
308 | return ret; | |
ad8f07cc MG |
309 | } |
310 | ||
19d337df | 311 | static void dell_rfkill_query(struct rfkill *rfkill, void *data) |
ad8f07cc | 312 | { |
ad8f07cc | 313 | int status; |
19d337df | 314 | int bit = (unsigned long)data + 16; |
c6760ac4 | 315 | int hwswitch_bit = (unsigned long)data - 1; |
ad8f07cc | 316 | |
116ee77b SH |
317 | get_buffer(); |
318 | dell_send_request(buffer, 17, 11); | |
319 | status = buffer->output[1]; | |
320 | release_buffer(); | |
ad8f07cc | 321 | |
e1fbf346 | 322 | rfkill_set_sw_state(rfkill, !!(status & BIT(bit))); |
c6760ac4 MG |
323 | |
324 | if (hwswitch_state & (BIT(hwswitch_bit))) | |
325 | rfkill_set_hw_state(rfkill, !(status & BIT(16))); | |
ad8f07cc MG |
326 | } |
327 | ||
19d337df JB |
328 | static const struct rfkill_ops dell_rfkill_ops = { |
329 | .set_block = dell_rfkill_set, | |
330 | .query = dell_rfkill_query, | |
331 | }; | |
ad8f07cc | 332 | |
037accfa KYL |
333 | static struct dentry *dell_laptop_dir; |
334 | ||
335 | static int dell_debugfs_show(struct seq_file *s, void *data) | |
336 | { | |
337 | int status; | |
338 | ||
339 | get_buffer(); | |
340 | dell_send_request(buffer, 17, 11); | |
341 | status = buffer->output[1]; | |
342 | release_buffer(); | |
343 | ||
344 | seq_printf(s, "status:\t0x%X\n", status); | |
345 | seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n", | |
346 | status & BIT(0)); | |
347 | seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n", | |
348 | (status & BIT(1)) >> 1); | |
349 | seq_printf(s, "Bit 2 : Wifi is supported: %lu\n", | |
350 | (status & BIT(2)) >> 2); | |
351 | seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n", | |
352 | (status & BIT(3)) >> 3); | |
353 | seq_printf(s, "Bit 4 : WWAN is supported: %lu\n", | |
354 | (status & BIT(4)) >> 4); | |
355 | seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n", | |
356 | (status & BIT(5)) >> 5); | |
357 | seq_printf(s, "Bit 8 : Wifi is installed: %lu\n", | |
358 | (status & BIT(8)) >> 8); | |
359 | seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n", | |
360 | (status & BIT(9)) >> 9); | |
361 | seq_printf(s, "Bit 10: WWAN is installed: %lu\n", | |
362 | (status & BIT(10)) >> 10); | |
363 | seq_printf(s, "Bit 16: Hardware switch is on: %lu\n", | |
364 | (status & BIT(16)) >> 16); | |
365 | seq_printf(s, "Bit 17: Wifi is blocked: %lu\n", | |
366 | (status & BIT(17)) >> 17); | |
367 | seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n", | |
368 | (status & BIT(18)) >> 18); | |
369 | seq_printf(s, "Bit 19: WWAN is blocked: %lu\n", | |
370 | (status & BIT(19)) >> 19); | |
371 | ||
372 | seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state); | |
373 | seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n", | |
374 | hwswitch_state & BIT(0)); | |
375 | seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n", | |
376 | (hwswitch_state & BIT(1)) >> 1); | |
377 | seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n", | |
378 | (hwswitch_state & BIT(2)) >> 2); | |
379 | seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n", | |
380 | (hwswitch_state & BIT(7)) >> 7); | |
381 | seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n", | |
382 | (hwswitch_state & BIT(8)) >> 8); | |
383 | seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n", | |
384 | (hwswitch_state & BIT(15)) >> 15); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | static int dell_debugfs_open(struct inode *inode, struct file *file) | |
390 | { | |
391 | return single_open(file, dell_debugfs_show, inode->i_private); | |
392 | } | |
393 | ||
394 | static const struct file_operations dell_debugfs_fops = { | |
395 | .owner = THIS_MODULE, | |
396 | .open = dell_debugfs_open, | |
397 | .read = seq_read, | |
398 | .llseek = seq_lseek, | |
399 | .release = single_release, | |
400 | }; | |
401 | ||
814cb8ad MG |
402 | static void dell_update_rfkill(struct work_struct *ignored) |
403 | { | |
a3d77411 KYL |
404 | int status; |
405 | ||
406 | get_buffer(); | |
407 | dell_send_request(buffer, 17, 11); | |
408 | status = buffer->output[1]; | |
409 | release_buffer(); | |
410 | ||
411 | /* if hardware rfkill is not supported, set it explicitly */ | |
412 | if (!(status & BIT(0))) { | |
413 | if (wifi_rfkill) | |
414 | dell_rfkill_set((void *)1, !((status & BIT(17)) >> 17)); | |
415 | if (bluetooth_rfkill) | |
416 | dell_rfkill_set((void *)2, !((status & BIT(18)) >> 18)); | |
417 | if (wwan_rfkill) | |
418 | dell_rfkill_set((void *)3, !((status & BIT(19)) >> 19)); | |
419 | } | |
420 | ||
814cb8ad MG |
421 | if (wifi_rfkill) |
422 | dell_rfkill_query(wifi_rfkill, (void *)1); | |
423 | if (bluetooth_rfkill) | |
424 | dell_rfkill_query(bluetooth_rfkill, (void *)2); | |
425 | if (wwan_rfkill) | |
426 | dell_rfkill_query(wwan_rfkill, (void *)3); | |
427 | } | |
428 | static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill); | |
429 | ||
430 | ||
4788df4c | 431 | static int __init dell_setup_rfkill(void) |
ad8f07cc | 432 | { |
ad8f07cc MG |
433 | int status; |
434 | int ret; | |
435 | ||
e5fefd0c ML |
436 | if (dmi_check_system(dell_blacklist)) { |
437 | printk(KERN_INFO "dell-laptop: Blacklisted hardware detected - " | |
438 | "not enabling rfkill\n"); | |
439 | return 0; | |
440 | } | |
441 | ||
116ee77b SH |
442 | get_buffer(); |
443 | dell_send_request(buffer, 17, 11); | |
444 | status = buffer->output[1]; | |
c6760ac4 MG |
445 | buffer->input[0] = 0x2; |
446 | dell_send_request(buffer, 17, 11); | |
447 | hwswitch_state = buffer->output[1]; | |
116ee77b | 448 | release_buffer(); |
ad8f07cc MG |
449 | |
450 | if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) { | |
ada3248a AJ |
451 | wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev, |
452 | RFKILL_TYPE_WLAN, | |
19d337df JB |
453 | &dell_rfkill_ops, (void *) 1); |
454 | if (!wifi_rfkill) { | |
455 | ret = -ENOMEM; | |
ad8f07cc | 456 | goto err_wifi; |
19d337df | 457 | } |
ad8f07cc MG |
458 | ret = rfkill_register(wifi_rfkill); |
459 | if (ret) | |
460 | goto err_wifi; | |
461 | } | |
462 | ||
463 | if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) { | |
ada3248a AJ |
464 | bluetooth_rfkill = rfkill_alloc("dell-bluetooth", |
465 | &platform_device->dev, | |
19d337df JB |
466 | RFKILL_TYPE_BLUETOOTH, |
467 | &dell_rfkill_ops, (void *) 2); | |
468 | if (!bluetooth_rfkill) { | |
469 | ret = -ENOMEM; | |
ad8f07cc | 470 | goto err_bluetooth; |
19d337df | 471 | } |
ad8f07cc MG |
472 | ret = rfkill_register(bluetooth_rfkill); |
473 | if (ret) | |
474 | goto err_bluetooth; | |
475 | } | |
476 | ||
477 | if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) { | |
ada3248a AJ |
478 | wwan_rfkill = rfkill_alloc("dell-wwan", |
479 | &platform_device->dev, | |
480 | RFKILL_TYPE_WWAN, | |
19d337df JB |
481 | &dell_rfkill_ops, (void *) 3); |
482 | if (!wwan_rfkill) { | |
483 | ret = -ENOMEM; | |
ad8f07cc | 484 | goto err_wwan; |
19d337df | 485 | } |
ad8f07cc MG |
486 | ret = rfkill_register(wwan_rfkill); |
487 | if (ret) | |
488 | goto err_wwan; | |
489 | } | |
490 | ||
491 | return 0; | |
492 | err_wwan: | |
19d337df JB |
493 | rfkill_destroy(wwan_rfkill); |
494 | if (bluetooth_rfkill) | |
ad8f07cc | 495 | rfkill_unregister(bluetooth_rfkill); |
ad8f07cc | 496 | err_bluetooth: |
19d337df JB |
497 | rfkill_destroy(bluetooth_rfkill); |
498 | if (wifi_rfkill) | |
ad8f07cc | 499 | rfkill_unregister(wifi_rfkill); |
ad8f07cc | 500 | err_wifi: |
19d337df | 501 | rfkill_destroy(wifi_rfkill); |
ad8f07cc MG |
502 | |
503 | return ret; | |
504 | } | |
505 | ||
4311bb23 AJ |
506 | static void dell_cleanup_rfkill(void) |
507 | { | |
508 | if (wifi_rfkill) { | |
509 | rfkill_unregister(wifi_rfkill); | |
510 | rfkill_destroy(wifi_rfkill); | |
511 | } | |
512 | if (bluetooth_rfkill) { | |
513 | rfkill_unregister(bluetooth_rfkill); | |
514 | rfkill_destroy(bluetooth_rfkill); | |
515 | } | |
516 | if (wwan_rfkill) { | |
517 | rfkill_unregister(wwan_rfkill); | |
518 | rfkill_destroy(wwan_rfkill); | |
519 | } | |
520 | } | |
521 | ||
ad8f07cc MG |
522 | static int dell_send_intensity(struct backlight_device *bd) |
523 | { | |
116ee77b | 524 | int ret = 0; |
ad8f07cc | 525 | |
116ee77b SH |
526 | get_buffer(); |
527 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
528 | buffer->input[1] = bd->props.brightness; | |
ad8f07cc | 529 | |
116ee77b SH |
530 | if (buffer->input[0] == -1) { |
531 | ret = -ENODEV; | |
532 | goto out; | |
533 | } | |
ad8f07cc MG |
534 | |
535 | if (power_supply_is_system_supplied() > 0) | |
116ee77b | 536 | dell_send_request(buffer, 1, 2); |
ad8f07cc | 537 | else |
116ee77b | 538 | dell_send_request(buffer, 1, 1); |
ad8f07cc | 539 | |
116ee77b SH |
540 | out: |
541 | release_buffer(); | |
ad8f07cc MG |
542 | return 0; |
543 | } | |
544 | ||
545 | static int dell_get_intensity(struct backlight_device *bd) | |
546 | { | |
116ee77b | 547 | int ret = 0; |
ad8f07cc | 548 | |
116ee77b SH |
549 | get_buffer(); |
550 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
ad8f07cc | 551 | |
116ee77b SH |
552 | if (buffer->input[0] == -1) { |
553 | ret = -ENODEV; | |
554 | goto out; | |
555 | } | |
ad8f07cc MG |
556 | |
557 | if (power_supply_is_system_supplied() > 0) | |
116ee77b | 558 | dell_send_request(buffer, 0, 2); |
ad8f07cc | 559 | else |
116ee77b | 560 | dell_send_request(buffer, 0, 1); |
ad8f07cc | 561 | |
116ee77b SH |
562 | out: |
563 | release_buffer(); | |
564 | if (ret) | |
565 | return ret; | |
566 | return buffer->output[1]; | |
ad8f07cc MG |
567 | } |
568 | ||
acc2472e | 569 | static const struct backlight_ops dell_ops = { |
ad8f07cc MG |
570 | .get_brightness = dell_get_intensity, |
571 | .update_status = dell_send_intensity, | |
572 | }; | |
573 | ||
4519169b | 574 | static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str, |
814cb8ad MG |
575 | struct serio *port) |
576 | { | |
577 | static bool extended; | |
578 | ||
579 | if (str & 0x20) | |
580 | return false; | |
581 | ||
582 | if (unlikely(data == 0xe0)) { | |
583 | extended = true; | |
584 | return false; | |
585 | } else if (unlikely(extended)) { | |
586 | switch (data) { | |
587 | case 0x8: | |
588 | schedule_delayed_work(&dell_rfkill_work, | |
589 | round_jiffies_relative(HZ)); | |
590 | break; | |
591 | } | |
592 | extended = false; | |
593 | } | |
594 | ||
595 | return false; | |
596 | } | |
597 | ||
ad8f07cc MG |
598 | static int __init dell_init(void) |
599 | { | |
ad8f07cc MG |
600 | int max_intensity = 0; |
601 | int ret; | |
602 | ||
603 | if (!dmi_check_system(dell_device_table)) | |
604 | return -ENODEV; | |
605 | ||
e7a19c56 | 606 | dmi_walk(find_tokens, NULL); |
ad8f07cc MG |
607 | |
608 | if (!da_tokens) { | |
609 | printk(KERN_INFO "dell-laptop: Unable to find dmi tokens\n"); | |
610 | return -ENODEV; | |
611 | } | |
612 | ||
ada3248a AJ |
613 | ret = platform_driver_register(&platform_driver); |
614 | if (ret) | |
615 | goto fail_platform_driver; | |
616 | platform_device = platform_device_alloc("dell-laptop", -1); | |
617 | if (!platform_device) { | |
618 | ret = -ENOMEM; | |
619 | goto fail_platform_device1; | |
620 | } | |
621 | ret = platform_device_add(platform_device); | |
622 | if (ret) | |
623 | goto fail_platform_device2; | |
624 | ||
116ee77b SH |
625 | /* |
626 | * Allocate buffer below 4GB for SMI data--only 32-bit physical addr | |
627 | * is passed to SMI handler. | |
628 | */ | |
629 | bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32); | |
630 | ||
631 | if (!bufferpage) | |
632 | goto fail_buffer; | |
633 | buffer = page_address(bufferpage); | |
634 | mutex_init(&buffer_mutex); | |
635 | ||
ad8f07cc MG |
636 | ret = dell_setup_rfkill(); |
637 | ||
638 | if (ret) { | |
639 | printk(KERN_WARNING "dell-laptop: Unable to setup rfkill\n"); | |
71e9dc73 | 640 | goto fail_rfkill; |
ad8f07cc MG |
641 | } |
642 | ||
814cb8ad MG |
643 | ret = i8042_install_filter(dell_laptop_i8042_filter); |
644 | if (ret) { | |
645 | printk(KERN_WARNING | |
646 | "dell-laptop: Unable to install key filter\n"); | |
647 | goto fail_filter; | |
648 | } | |
649 | ||
037accfa KYL |
650 | dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL); |
651 | if (dell_laptop_dir != NULL) | |
652 | debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL, | |
653 | &dell_debugfs_fops); | |
654 | ||
ad8f07cc MG |
655 | #ifdef CONFIG_ACPI |
656 | /* In the event of an ACPI backlight being available, don't | |
657 | * register the platform controller. | |
658 | */ | |
659 | if (acpi_video_backlight_support()) | |
660 | return 0; | |
661 | #endif | |
662 | ||
116ee77b SH |
663 | get_buffer(); |
664 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
665 | if (buffer->input[0] != -1) { | |
666 | dell_send_request(buffer, 0, 2); | |
667 | max_intensity = buffer->output[3]; | |
ad8f07cc | 668 | } |
116ee77b | 669 | release_buffer(); |
ad8f07cc MG |
670 | |
671 | if (max_intensity) { | |
a19a6ee6 MG |
672 | struct backlight_properties props; |
673 | memset(&props, 0, sizeof(struct backlight_properties)); | |
bb7ca747 | 674 | props.type = BACKLIGHT_PLATFORM; |
a19a6ee6 MG |
675 | props.max_brightness = max_intensity; |
676 | dell_backlight_device = backlight_device_register("dell_backlight", | |
677 | &platform_device->dev, | |
678 | NULL, | |
679 | &dell_ops, | |
680 | &props); | |
ad8f07cc MG |
681 | |
682 | if (IS_ERR(dell_backlight_device)) { | |
683 | ret = PTR_ERR(dell_backlight_device); | |
684 | dell_backlight_device = NULL; | |
71e9dc73 | 685 | goto fail_backlight; |
ad8f07cc MG |
686 | } |
687 | ||
ad8f07cc MG |
688 | dell_backlight_device->props.brightness = |
689 | dell_get_intensity(dell_backlight_device); | |
690 | backlight_update_status(dell_backlight_device); | |
691 | } | |
692 | ||
693 | return 0; | |
71e9dc73 AJ |
694 | |
695 | fail_backlight: | |
814cb8ad | 696 | i8042_remove_filter(dell_laptop_i8042_filter); |
92e00e47 | 697 | cancel_delayed_work_sync(&dell_rfkill_work); |
814cb8ad | 698 | fail_filter: |
4311bb23 | 699 | dell_cleanup_rfkill(); |
71e9dc73 | 700 | fail_rfkill: |
116ee77b SH |
701 | free_page((unsigned long)bufferpage); |
702 | fail_buffer: | |
ada3248a AJ |
703 | platform_device_del(platform_device); |
704 | fail_platform_device2: | |
705 | platform_device_put(platform_device); | |
706 | fail_platform_device1: | |
707 | platform_driver_unregister(&platform_driver); | |
708 | fail_platform_driver: | |
ad8f07cc MG |
709 | kfree(da_tokens); |
710 | return ret; | |
711 | } | |
712 | ||
713 | static void __exit dell_exit(void) | |
714 | { | |
037accfa | 715 | debugfs_remove_recursive(dell_laptop_dir); |
814cb8ad | 716 | i8042_remove_filter(dell_laptop_i8042_filter); |
92e00e47 | 717 | cancel_delayed_work_sync(&dell_rfkill_work); |
ad8f07cc | 718 | backlight_device_unregister(dell_backlight_device); |
4311bb23 | 719 | dell_cleanup_rfkill(); |
facd61d7 | 720 | if (platform_device) { |
92e00e47 | 721 | platform_device_unregister(platform_device); |
facd61d7 MG |
722 | platform_driver_unregister(&platform_driver); |
723 | } | |
e551260b | 724 | kfree(da_tokens); |
116ee77b | 725 | free_page((unsigned long)buffer); |
ad8f07cc MG |
726 | } |
727 | ||
728 | module_init(dell_init); | |
729 | module_exit(dell_exit); | |
730 | ||
731 | MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); | |
732 | MODULE_DESCRIPTION("Dell laptop driver"); | |
733 | MODULE_LICENSE("GPL"); | |
734 | MODULE_ALIAS("dmi:*svnDellInc.:*:ct8:*"); | |
410d44c7 | 735 | MODULE_ALIAS("dmi:*svnDellInc.:*:ct9:*"); |
cb6a7937 | 736 | MODULE_ALIAS("dmi:*svnDellComputerCorporation.:*:ct8:*"); |