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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> | |
24 | #include <linux/rfkill.h> | |
25 | #include <linux/power_supply.h> | |
26 | #include <linux/acpi.h> | |
116ee77b | 27 | #include <linux/mm.h> |
814cb8ad | 28 | #include <linux/i8042.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
037accfa KYL |
30 | #include <linux/debugfs.h> |
31 | #include <linux/seq_file.h> | |
cad73120 | 32 | #include "../../firmware/dcdbas.h" |
ad8f07cc MG |
33 | |
34 | #define BRIGHTNESS_TOKEN 0x7d | |
35 | ||
36 | /* This structure will be modified by the firmware when we enter | |
37 | * system management mode, hence the volatiles */ | |
38 | ||
39 | struct calling_interface_buffer { | |
40 | u16 class; | |
41 | u16 select; | |
42 | volatile u32 input[4]; | |
43 | volatile u32 output[4]; | |
44 | } __packed; | |
45 | ||
46 | struct calling_interface_token { | |
47 | u16 tokenID; | |
48 | u16 location; | |
49 | union { | |
50 | u16 value; | |
51 | u16 stringlength; | |
52 | }; | |
53 | }; | |
54 | ||
55 | struct calling_interface_structure { | |
56 | struct dmi_header header; | |
57 | u16 cmdIOAddress; | |
58 | u8 cmdIOCode; | |
59 | u32 supportedCmds; | |
60 | struct calling_interface_token tokens[]; | |
61 | } __packed; | |
62 | ||
63 | static int da_command_address; | |
64 | static int da_command_code; | |
65 | static int da_num_tokens; | |
66 | static struct calling_interface_token *da_tokens; | |
67 | ||
ada3248a AJ |
68 | static struct platform_driver platform_driver = { |
69 | .driver = { | |
70 | .name = "dell-laptop", | |
71 | .owner = THIS_MODULE, | |
72 | } | |
73 | }; | |
74 | ||
75 | static struct platform_device *platform_device; | |
ad8f07cc MG |
76 | static struct backlight_device *dell_backlight_device; |
77 | static struct rfkill *wifi_rfkill; | |
78 | static struct rfkill *bluetooth_rfkill; | |
79 | static struct rfkill *wwan_rfkill; | |
80 | ||
81 | static const struct dmi_system_id __initdata dell_device_table[] = { | |
82 | { | |
83 | .ident = "Dell laptop", | |
84 | .matches = { | |
85 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
86 | DMI_MATCH(DMI_CHASSIS_TYPE, "8"), | |
87 | }, | |
88 | }, | |
410d44c7 RK |
89 | { |
90 | .matches = { | |
91 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
92 | DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/ | |
93 | }, | |
94 | }, | |
cb6a7937 EA |
95 | { |
96 | .ident = "Dell Computer Corporation", | |
97 | .matches = { | |
98 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), | |
99 | DMI_MATCH(DMI_CHASSIS_TYPE, "8"), | |
100 | }, | |
101 | }, | |
ad8f07cc MG |
102 | { } |
103 | }; | |
104 | ||
e5fefd0c ML |
105 | static struct dmi_system_id __devinitdata dell_blacklist[] = { |
106 | /* Supported by compal-laptop */ | |
107 | { | |
108 | .ident = "Dell Mini 9", | |
109 | .matches = { | |
110 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
111 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"), | |
112 | }, | |
113 | }, | |
114 | { | |
115 | .ident = "Dell Mini 10", | |
116 | .matches = { | |
117 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
118 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"), | |
119 | }, | |
120 | }, | |
121 | { | |
122 | .ident = "Dell Mini 10v", | |
123 | .matches = { | |
124 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
125 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"), | |
126 | }, | |
127 | }, | |
c3f755e3 VE |
128 | { |
129 | .ident = "Dell Mini 1012", | |
130 | .matches = { | |
131 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
132 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"), | |
133 | }, | |
134 | }, | |
e5fefd0c ML |
135 | { |
136 | .ident = "Dell Inspiron 11z", | |
137 | .matches = { | |
138 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
139 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"), | |
140 | }, | |
141 | }, | |
142 | { | |
143 | .ident = "Dell Mini 12", | |
144 | .matches = { | |
145 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
146 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"), | |
147 | }, | |
148 | }, | |
149 | {} | |
150 | }; | |
151 | ||
116ee77b | 152 | static struct calling_interface_buffer *buffer; |
94d8f785 IM |
153 | static struct page *bufferpage; |
154 | static DEFINE_MUTEX(buffer_mutex); | |
116ee77b | 155 | |
c6760ac4 MG |
156 | static int hwswitch_state; |
157 | ||
116ee77b SH |
158 | static void get_buffer(void) |
159 | { | |
160 | mutex_lock(&buffer_mutex); | |
161 | memset(buffer, 0, sizeof(struct calling_interface_buffer)); | |
162 | } | |
163 | ||
164 | static void release_buffer(void) | |
165 | { | |
166 | mutex_unlock(&buffer_mutex); | |
167 | } | |
168 | ||
4788df4c | 169 | static void __init parse_da_table(const struct dmi_header *dm) |
ad8f07cc MG |
170 | { |
171 | /* Final token is a terminator, so we don't want to copy it */ | |
172 | int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1; | |
173 | struct calling_interface_structure *table = | |
174 | container_of(dm, struct calling_interface_structure, header); | |
175 | ||
176 | /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least | |
177 | 6 bytes of entry */ | |
178 | ||
179 | if (dm->length < 17) | |
180 | return; | |
181 | ||
182 | da_command_address = table->cmdIOAddress; | |
183 | da_command_code = table->cmdIOCode; | |
184 | ||
185 | da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * | |
186 | sizeof(struct calling_interface_token), | |
187 | GFP_KERNEL); | |
188 | ||
189 | if (!da_tokens) | |
190 | return; | |
191 | ||
192 | memcpy(da_tokens+da_num_tokens, table->tokens, | |
193 | sizeof(struct calling_interface_token) * tokens); | |
194 | ||
195 | da_num_tokens += tokens; | |
196 | } | |
197 | ||
4788df4c | 198 | static void __init find_tokens(const struct dmi_header *dm, void *dummy) |
ad8f07cc MG |
199 | { |
200 | switch (dm->type) { | |
201 | case 0xd4: /* Indexed IO */ | |
202 | break; | |
203 | case 0xd5: /* Protected Area Type 1 */ | |
204 | break; | |
205 | case 0xd6: /* Protected Area Type 2 */ | |
206 | break; | |
207 | case 0xda: /* Calling interface */ | |
208 | parse_da_table(dm); | |
209 | break; | |
210 | } | |
211 | } | |
212 | ||
213 | static int find_token_location(int tokenid) | |
214 | { | |
215 | int i; | |
216 | for (i = 0; i < da_num_tokens; i++) { | |
217 | if (da_tokens[i].tokenID == tokenid) | |
218 | return da_tokens[i].location; | |
219 | } | |
220 | ||
221 | return -1; | |
222 | } | |
223 | ||
224 | static struct calling_interface_buffer * | |
225 | dell_send_request(struct calling_interface_buffer *buffer, int class, | |
226 | int select) | |
227 | { | |
228 | struct smi_cmd command; | |
229 | ||
230 | command.magic = SMI_CMD_MAGIC; | |
231 | command.command_address = da_command_address; | |
232 | command.command_code = da_command_code; | |
233 | command.ebx = virt_to_phys(buffer); | |
234 | command.ecx = 0x42534931; | |
235 | ||
236 | buffer->class = class; | |
237 | buffer->select = select; | |
238 | ||
239 | dcdbas_smi_request(&command); | |
240 | ||
241 | return buffer; | |
242 | } | |
243 | ||
244 | /* Derived from information in DellWirelessCtl.cpp: | |
245 | Class 17, select 11 is radio control. It returns an array of 32-bit values. | |
246 | ||
c6760ac4 MG |
247 | Input byte 0 = 0: Wireless information |
248 | ||
ad8f07cc MG |
249 | result[0]: return code |
250 | result[1]: | |
251 | Bit 0: Hardware switch supported | |
252 | Bit 1: Wifi locator supported | |
253 | Bit 2: Wifi is supported | |
254 | Bit 3: Bluetooth is supported | |
255 | Bit 4: WWAN is supported | |
256 | Bit 5: Wireless keyboard supported | |
257 | Bits 6-7: Reserved | |
258 | Bit 8: Wifi is installed | |
259 | Bit 9: Bluetooth is installed | |
260 | Bit 10: WWAN is installed | |
261 | Bits 11-15: Reserved | |
262 | Bit 16: Hardware switch is on | |
263 | Bit 17: Wifi is blocked | |
264 | Bit 18: Bluetooth is blocked | |
265 | Bit 19: WWAN is blocked | |
266 | Bits 20-31: Reserved | |
267 | result[2]: NVRAM size in bytes | |
268 | result[3]: NVRAM format version number | |
c6760ac4 MG |
269 | |
270 | Input byte 0 = 2: Wireless switch configuration | |
271 | result[0]: return code | |
272 | result[1]: | |
273 | Bit 0: Wifi controlled by switch | |
274 | Bit 1: Bluetooth controlled by switch | |
275 | Bit 2: WWAN controlled by switch | |
276 | Bits 3-6: Reserved | |
277 | Bit 7: Wireless switch config locked | |
278 | Bit 8: Wifi locator enabled | |
279 | Bits 9-14: Reserved | |
280 | Bit 15: Wifi locator setting locked | |
281 | Bits 16-31: Reserved | |
ad8f07cc MG |
282 | */ |
283 | ||
19d337df | 284 | static int dell_rfkill_set(void *data, bool blocked) |
ad8f07cc | 285 | { |
624f0de4 | 286 | int disable = blocked ? 1 : 0; |
19d337df | 287 | unsigned long radio = (unsigned long)data; |
c6760ac4 | 288 | int hwswitch_bit = (unsigned long)data - 1; |
116ee77b | 289 | int ret = 0; |
ad8f07cc | 290 | |
116ee77b SH |
291 | get_buffer(); |
292 | dell_send_request(buffer, 17, 11); | |
ec1722a2 | 293 | |
c6760ac4 | 294 | /* If the hardware switch controls this radio, and the hardware |
be65dde8 | 295 | switch is disabled, don't allow changing the software state */ |
c6760ac4 | 296 | if ((hwswitch_state & BIT(hwswitch_bit)) && |
be65dde8 | 297 | !(buffer->output[1] & BIT(16))) { |
116ee77b SH |
298 | ret = -EINVAL; |
299 | goto out; | |
300 | } | |
ad8f07cc | 301 | |
116ee77b SH |
302 | buffer->input[0] = (1 | (radio<<8) | (disable << 16)); |
303 | dell_send_request(buffer, 17, 11); | |
304 | ||
305 | out: | |
306 | release_buffer(); | |
307 | return ret; | |
ad8f07cc MG |
308 | } |
309 | ||
19d337df | 310 | static void dell_rfkill_query(struct rfkill *rfkill, void *data) |
ad8f07cc | 311 | { |
ad8f07cc | 312 | int status; |
19d337df | 313 | int bit = (unsigned long)data + 16; |
c6760ac4 | 314 | int hwswitch_bit = (unsigned long)data - 1; |
ad8f07cc | 315 | |
116ee77b SH |
316 | get_buffer(); |
317 | dell_send_request(buffer, 17, 11); | |
318 | status = buffer->output[1]; | |
319 | release_buffer(); | |
ad8f07cc | 320 | |
e1fbf346 | 321 | rfkill_set_sw_state(rfkill, !!(status & BIT(bit))); |
c6760ac4 MG |
322 | |
323 | if (hwswitch_state & (BIT(hwswitch_bit))) | |
324 | rfkill_set_hw_state(rfkill, !(status & BIT(16))); | |
ad8f07cc MG |
325 | } |
326 | ||
19d337df JB |
327 | static const struct rfkill_ops dell_rfkill_ops = { |
328 | .set_block = dell_rfkill_set, | |
329 | .query = dell_rfkill_query, | |
330 | }; | |
ad8f07cc | 331 | |
037accfa KYL |
332 | static struct dentry *dell_laptop_dir; |
333 | ||
334 | static int dell_debugfs_show(struct seq_file *s, void *data) | |
335 | { | |
336 | int status; | |
337 | ||
338 | get_buffer(); | |
339 | dell_send_request(buffer, 17, 11); | |
340 | status = buffer->output[1]; | |
341 | release_buffer(); | |
342 | ||
343 | seq_printf(s, "status:\t0x%X\n", status); | |
344 | seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n", | |
345 | status & BIT(0)); | |
346 | seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n", | |
347 | (status & BIT(1)) >> 1); | |
348 | seq_printf(s, "Bit 2 : Wifi is supported: %lu\n", | |
349 | (status & BIT(2)) >> 2); | |
350 | seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n", | |
351 | (status & BIT(3)) >> 3); | |
352 | seq_printf(s, "Bit 4 : WWAN is supported: %lu\n", | |
353 | (status & BIT(4)) >> 4); | |
354 | seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n", | |
355 | (status & BIT(5)) >> 5); | |
356 | seq_printf(s, "Bit 8 : Wifi is installed: %lu\n", | |
357 | (status & BIT(8)) >> 8); | |
358 | seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n", | |
359 | (status & BIT(9)) >> 9); | |
360 | seq_printf(s, "Bit 10: WWAN is installed: %lu\n", | |
361 | (status & BIT(10)) >> 10); | |
362 | seq_printf(s, "Bit 16: Hardware switch is on: %lu\n", | |
363 | (status & BIT(16)) >> 16); | |
364 | seq_printf(s, "Bit 17: Wifi is blocked: %lu\n", | |
365 | (status & BIT(17)) >> 17); | |
366 | seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n", | |
367 | (status & BIT(18)) >> 18); | |
368 | seq_printf(s, "Bit 19: WWAN is blocked: %lu\n", | |
369 | (status & BIT(19)) >> 19); | |
370 | ||
371 | seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state); | |
372 | seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n", | |
373 | hwswitch_state & BIT(0)); | |
374 | seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n", | |
375 | (hwswitch_state & BIT(1)) >> 1); | |
376 | seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n", | |
377 | (hwswitch_state & BIT(2)) >> 2); | |
378 | seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n", | |
379 | (hwswitch_state & BIT(7)) >> 7); | |
380 | seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n", | |
381 | (hwswitch_state & BIT(8)) >> 8); | |
382 | seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n", | |
383 | (hwswitch_state & BIT(15)) >> 15); | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | static int dell_debugfs_open(struct inode *inode, struct file *file) | |
389 | { | |
390 | return single_open(file, dell_debugfs_show, inode->i_private); | |
391 | } | |
392 | ||
393 | static const struct file_operations dell_debugfs_fops = { | |
394 | .owner = THIS_MODULE, | |
395 | .open = dell_debugfs_open, | |
396 | .read = seq_read, | |
397 | .llseek = seq_lseek, | |
398 | .release = single_release, | |
399 | }; | |
400 | ||
814cb8ad MG |
401 | static void dell_update_rfkill(struct work_struct *ignored) |
402 | { | |
403 | if (wifi_rfkill) | |
404 | dell_rfkill_query(wifi_rfkill, (void *)1); | |
405 | if (bluetooth_rfkill) | |
406 | dell_rfkill_query(bluetooth_rfkill, (void *)2); | |
407 | if (wwan_rfkill) | |
408 | dell_rfkill_query(wwan_rfkill, (void *)3); | |
409 | } | |
410 | static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill); | |
411 | ||
412 | ||
4788df4c | 413 | static int __init dell_setup_rfkill(void) |
ad8f07cc | 414 | { |
ad8f07cc MG |
415 | int status; |
416 | int ret; | |
417 | ||
e5fefd0c | 418 | if (dmi_check_system(dell_blacklist)) { |
eb889524 | 419 | pr_info("Blacklisted hardware detected - not enabling rfkill\n"); |
e5fefd0c ML |
420 | return 0; |
421 | } | |
422 | ||
116ee77b SH |
423 | get_buffer(); |
424 | dell_send_request(buffer, 17, 11); | |
425 | status = buffer->output[1]; | |
c6760ac4 MG |
426 | buffer->input[0] = 0x2; |
427 | dell_send_request(buffer, 17, 11); | |
428 | hwswitch_state = buffer->output[1]; | |
116ee77b | 429 | release_buffer(); |
ad8f07cc MG |
430 | |
431 | if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) { | |
ada3248a AJ |
432 | wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev, |
433 | RFKILL_TYPE_WLAN, | |
19d337df JB |
434 | &dell_rfkill_ops, (void *) 1); |
435 | if (!wifi_rfkill) { | |
436 | ret = -ENOMEM; | |
ad8f07cc | 437 | goto err_wifi; |
19d337df | 438 | } |
ad8f07cc MG |
439 | ret = rfkill_register(wifi_rfkill); |
440 | if (ret) | |
441 | goto err_wifi; | |
442 | } | |
443 | ||
444 | if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) { | |
ada3248a AJ |
445 | bluetooth_rfkill = rfkill_alloc("dell-bluetooth", |
446 | &platform_device->dev, | |
19d337df JB |
447 | RFKILL_TYPE_BLUETOOTH, |
448 | &dell_rfkill_ops, (void *) 2); | |
449 | if (!bluetooth_rfkill) { | |
450 | ret = -ENOMEM; | |
ad8f07cc | 451 | goto err_bluetooth; |
19d337df | 452 | } |
ad8f07cc MG |
453 | ret = rfkill_register(bluetooth_rfkill); |
454 | if (ret) | |
455 | goto err_bluetooth; | |
456 | } | |
457 | ||
458 | if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) { | |
ada3248a AJ |
459 | wwan_rfkill = rfkill_alloc("dell-wwan", |
460 | &platform_device->dev, | |
461 | RFKILL_TYPE_WWAN, | |
19d337df JB |
462 | &dell_rfkill_ops, (void *) 3); |
463 | if (!wwan_rfkill) { | |
464 | ret = -ENOMEM; | |
ad8f07cc | 465 | goto err_wwan; |
19d337df | 466 | } |
ad8f07cc MG |
467 | ret = rfkill_register(wwan_rfkill); |
468 | if (ret) | |
469 | goto err_wwan; | |
470 | } | |
471 | ||
472 | return 0; | |
473 | err_wwan: | |
19d337df JB |
474 | rfkill_destroy(wwan_rfkill); |
475 | if (bluetooth_rfkill) | |
ad8f07cc | 476 | rfkill_unregister(bluetooth_rfkill); |
ad8f07cc | 477 | err_bluetooth: |
19d337df JB |
478 | rfkill_destroy(bluetooth_rfkill); |
479 | if (wifi_rfkill) | |
ad8f07cc | 480 | rfkill_unregister(wifi_rfkill); |
ad8f07cc | 481 | err_wifi: |
19d337df | 482 | rfkill_destroy(wifi_rfkill); |
ad8f07cc MG |
483 | |
484 | return ret; | |
485 | } | |
486 | ||
4311bb23 AJ |
487 | static void dell_cleanup_rfkill(void) |
488 | { | |
489 | if (wifi_rfkill) { | |
490 | rfkill_unregister(wifi_rfkill); | |
491 | rfkill_destroy(wifi_rfkill); | |
492 | } | |
493 | if (bluetooth_rfkill) { | |
494 | rfkill_unregister(bluetooth_rfkill); | |
495 | rfkill_destroy(bluetooth_rfkill); | |
496 | } | |
497 | if (wwan_rfkill) { | |
498 | rfkill_unregister(wwan_rfkill); | |
499 | rfkill_destroy(wwan_rfkill); | |
500 | } | |
501 | } | |
502 | ||
ad8f07cc MG |
503 | static int dell_send_intensity(struct backlight_device *bd) |
504 | { | |
116ee77b | 505 | int ret = 0; |
ad8f07cc | 506 | |
116ee77b SH |
507 | get_buffer(); |
508 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
509 | buffer->input[1] = bd->props.brightness; | |
ad8f07cc | 510 | |
116ee77b SH |
511 | if (buffer->input[0] == -1) { |
512 | ret = -ENODEV; | |
513 | goto out; | |
514 | } | |
ad8f07cc MG |
515 | |
516 | if (power_supply_is_system_supplied() > 0) | |
116ee77b | 517 | dell_send_request(buffer, 1, 2); |
ad8f07cc | 518 | else |
116ee77b | 519 | dell_send_request(buffer, 1, 1); |
ad8f07cc | 520 | |
116ee77b SH |
521 | out: |
522 | release_buffer(); | |
ad8f07cc MG |
523 | return 0; |
524 | } | |
525 | ||
526 | static int dell_get_intensity(struct backlight_device *bd) | |
527 | { | |
116ee77b | 528 | int ret = 0; |
ad8f07cc | 529 | |
116ee77b SH |
530 | get_buffer(); |
531 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
ad8f07cc | 532 | |
116ee77b SH |
533 | if (buffer->input[0] == -1) { |
534 | ret = -ENODEV; | |
535 | goto out; | |
536 | } | |
ad8f07cc MG |
537 | |
538 | if (power_supply_is_system_supplied() > 0) | |
116ee77b | 539 | dell_send_request(buffer, 0, 2); |
ad8f07cc | 540 | else |
116ee77b | 541 | dell_send_request(buffer, 0, 1); |
ad8f07cc | 542 | |
b486742a JA |
543 | ret = buffer->output[1]; |
544 | ||
116ee77b SH |
545 | out: |
546 | release_buffer(); | |
b486742a | 547 | return ret; |
ad8f07cc MG |
548 | } |
549 | ||
acc2472e | 550 | static const struct backlight_ops dell_ops = { |
ad8f07cc MG |
551 | .get_brightness = dell_get_intensity, |
552 | .update_status = dell_send_intensity, | |
553 | }; | |
554 | ||
4519169b | 555 | static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str, |
814cb8ad MG |
556 | struct serio *port) |
557 | { | |
558 | static bool extended; | |
559 | ||
560 | if (str & 0x20) | |
561 | return false; | |
562 | ||
563 | if (unlikely(data == 0xe0)) { | |
564 | extended = true; | |
565 | return false; | |
566 | } else if (unlikely(extended)) { | |
567 | switch (data) { | |
568 | case 0x8: | |
569 | schedule_delayed_work(&dell_rfkill_work, | |
570 | round_jiffies_relative(HZ)); | |
571 | break; | |
572 | } | |
573 | extended = false; | |
574 | } | |
575 | ||
576 | return false; | |
577 | } | |
578 | ||
ad8f07cc MG |
579 | static int __init dell_init(void) |
580 | { | |
ad8f07cc MG |
581 | int max_intensity = 0; |
582 | int ret; | |
583 | ||
584 | if (!dmi_check_system(dell_device_table)) | |
585 | return -ENODEV; | |
586 | ||
e7a19c56 | 587 | dmi_walk(find_tokens, NULL); |
ad8f07cc MG |
588 | |
589 | if (!da_tokens) { | |
eb889524 | 590 | pr_info("Unable to find dmi tokens\n"); |
ad8f07cc MG |
591 | return -ENODEV; |
592 | } | |
593 | ||
ada3248a AJ |
594 | ret = platform_driver_register(&platform_driver); |
595 | if (ret) | |
596 | goto fail_platform_driver; | |
597 | platform_device = platform_device_alloc("dell-laptop", -1); | |
598 | if (!platform_device) { | |
599 | ret = -ENOMEM; | |
600 | goto fail_platform_device1; | |
601 | } | |
602 | ret = platform_device_add(platform_device); | |
603 | if (ret) | |
604 | goto fail_platform_device2; | |
605 | ||
116ee77b SH |
606 | /* |
607 | * Allocate buffer below 4GB for SMI data--only 32-bit physical addr | |
608 | * is passed to SMI handler. | |
609 | */ | |
610 | bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32); | |
611 | ||
612 | if (!bufferpage) | |
613 | goto fail_buffer; | |
614 | buffer = page_address(bufferpage); | |
116ee77b | 615 | |
ad8f07cc MG |
616 | ret = dell_setup_rfkill(); |
617 | ||
618 | if (ret) { | |
eb889524 | 619 | pr_warn("Unable to setup rfkill\n"); |
71e9dc73 | 620 | goto fail_rfkill; |
ad8f07cc MG |
621 | } |
622 | ||
814cb8ad MG |
623 | ret = i8042_install_filter(dell_laptop_i8042_filter); |
624 | if (ret) { | |
eb889524 | 625 | pr_warn("Unable to install key filter\n"); |
814cb8ad MG |
626 | goto fail_filter; |
627 | } | |
628 | ||
037accfa KYL |
629 | dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL); |
630 | if (dell_laptop_dir != NULL) | |
631 | debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL, | |
632 | &dell_debugfs_fops); | |
633 | ||
ad8f07cc MG |
634 | #ifdef CONFIG_ACPI |
635 | /* In the event of an ACPI backlight being available, don't | |
636 | * register the platform controller. | |
637 | */ | |
638 | if (acpi_video_backlight_support()) | |
639 | return 0; | |
640 | #endif | |
641 | ||
116ee77b SH |
642 | get_buffer(); |
643 | buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); | |
644 | if (buffer->input[0] != -1) { | |
645 | dell_send_request(buffer, 0, 2); | |
646 | max_intensity = buffer->output[3]; | |
ad8f07cc | 647 | } |
116ee77b | 648 | release_buffer(); |
ad8f07cc MG |
649 | |
650 | if (max_intensity) { | |
a19a6ee6 MG |
651 | struct backlight_properties props; |
652 | memset(&props, 0, sizeof(struct backlight_properties)); | |
bb7ca747 | 653 | props.type = BACKLIGHT_PLATFORM; |
a19a6ee6 MG |
654 | props.max_brightness = max_intensity; |
655 | dell_backlight_device = backlight_device_register("dell_backlight", | |
656 | &platform_device->dev, | |
657 | NULL, | |
658 | &dell_ops, | |
659 | &props); | |
ad8f07cc MG |
660 | |
661 | if (IS_ERR(dell_backlight_device)) { | |
662 | ret = PTR_ERR(dell_backlight_device); | |
663 | dell_backlight_device = NULL; | |
71e9dc73 | 664 | goto fail_backlight; |
ad8f07cc MG |
665 | } |
666 | ||
ad8f07cc MG |
667 | dell_backlight_device->props.brightness = |
668 | dell_get_intensity(dell_backlight_device); | |
669 | backlight_update_status(dell_backlight_device); | |
670 | } | |
671 | ||
672 | return 0; | |
71e9dc73 AJ |
673 | |
674 | fail_backlight: | |
814cb8ad | 675 | i8042_remove_filter(dell_laptop_i8042_filter); |
92e00e47 | 676 | cancel_delayed_work_sync(&dell_rfkill_work); |
814cb8ad | 677 | fail_filter: |
4311bb23 | 678 | dell_cleanup_rfkill(); |
71e9dc73 | 679 | fail_rfkill: |
116ee77b SH |
680 | free_page((unsigned long)bufferpage); |
681 | fail_buffer: | |
ada3248a AJ |
682 | platform_device_del(platform_device); |
683 | fail_platform_device2: | |
684 | platform_device_put(platform_device); | |
685 | fail_platform_device1: | |
686 | platform_driver_unregister(&platform_driver); | |
687 | fail_platform_driver: | |
ad8f07cc MG |
688 | kfree(da_tokens); |
689 | return ret; | |
690 | } | |
691 | ||
692 | static void __exit dell_exit(void) | |
693 | { | |
037accfa | 694 | debugfs_remove_recursive(dell_laptop_dir); |
814cb8ad | 695 | i8042_remove_filter(dell_laptop_i8042_filter); |
92e00e47 | 696 | cancel_delayed_work_sync(&dell_rfkill_work); |
ad8f07cc | 697 | backlight_device_unregister(dell_backlight_device); |
4311bb23 | 698 | dell_cleanup_rfkill(); |
facd61d7 | 699 | if (platform_device) { |
92e00e47 | 700 | platform_device_unregister(platform_device); |
facd61d7 MG |
701 | platform_driver_unregister(&platform_driver); |
702 | } | |
e551260b | 703 | kfree(da_tokens); |
116ee77b | 704 | free_page((unsigned long)buffer); |
ad8f07cc MG |
705 | } |
706 | ||
707 | module_init(dell_init); | |
708 | module_exit(dell_exit); | |
709 | ||
710 | MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); | |
711 | MODULE_DESCRIPTION("Dell laptop driver"); | |
712 | MODULE_LICENSE("GPL"); | |
713 | MODULE_ALIAS("dmi:*svnDellInc.:*:ct8:*"); | |
410d44c7 | 714 | MODULE_ALIAS("dmi:*svnDellInc.:*:ct9:*"); |
cb6a7937 | 715 | MODULE_ALIAS("dmi:*svnDellComputerCorporation.:*:ct8:*"); |