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bff431e4 CC |
1 | /* |
2 | * ACPI-WMI mapping driver | |
3 | * | |
4 | * Copyright (C) 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk> | |
5 | * | |
6 | * GUID parsing code from ldm.c is: | |
7 | * Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org> | |
8 | * Copyright (c) 2001-2007 Anton Altaparmakov | |
9 | * Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com> | |
10 | * | |
11 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or (at | |
16 | * your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, but | |
19 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | * General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License along | |
24 | * with this program; if not, write to the Free Software Foundation, Inc., | |
25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
26 | * | |
27 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
28 | */ | |
29 | ||
8e07514d DT |
30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
31 | ||
bff431e4 CC |
32 | #include <linux/kernel.h> |
33 | #include <linux/init.h> | |
34 | #include <linux/types.h> | |
1caab3c1 | 35 | #include <linux/device.h> |
bff431e4 CC |
36 | #include <linux/list.h> |
37 | #include <linux/acpi.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
7c52d551 | 39 | #include <linux/module.h> |
9599ed91 | 40 | #include <linux/platform_device.h> |
844af950 | 41 | #include <linux/wmi.h> |
538d7eb8 | 42 | #include <linux/uuid.h> |
bff431e4 CC |
43 | |
44 | ACPI_MODULE_NAME("wmi"); | |
45 | MODULE_AUTHOR("Carlos Corbacho"); | |
46 | MODULE_DESCRIPTION("ACPI-WMI Mapping Driver"); | |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
762e1a2f | 49 | static LIST_HEAD(wmi_block_list); |
bff431e4 CC |
50 | |
51 | struct guid_block { | |
52 | char guid[16]; | |
53 | union { | |
54 | char object_id[2]; | |
55 | struct { | |
56 | unsigned char notify_id; | |
57 | unsigned char reserved; | |
58 | }; | |
59 | }; | |
60 | u8 instance_count; | |
61 | u8 flags; | |
62 | }; | |
63 | ||
64 | struct wmi_block { | |
844af950 | 65 | struct wmi_device dev; |
bff431e4 CC |
66 | struct list_head list; |
67 | struct guid_block gblock; | |
b0e86302 | 68 | struct acpi_device *acpi_device; |
bff431e4 CC |
69 | wmi_notify_handler handler; |
70 | void *handler_data; | |
d4fc91ad | 71 | |
fd70da6a | 72 | bool read_takes_no_args; |
bff431e4 CC |
73 | }; |
74 | ||
bff431e4 CC |
75 | |
76 | /* | |
77 | * If the GUID data block is marked as expensive, we must enable and | |
78 | * explicitily disable data collection. | |
79 | */ | |
80 | #define ACPI_WMI_EXPENSIVE 0x1 | |
81 | #define ACPI_WMI_METHOD 0x2 /* GUID is a method */ | |
82 | #define ACPI_WMI_STRING 0x4 /* GUID takes & returns a string */ | |
83 | #define ACPI_WMI_EVENT 0x8 /* GUID is an event */ | |
84 | ||
90ab5ee9 | 85 | static bool debug_event; |
fc3155b2 TR |
86 | module_param(debug_event, bool, 0444); |
87 | MODULE_PARM_DESC(debug_event, | |
88 | "Log WMI Events [0/1]"); | |
89 | ||
90ab5ee9 | 90 | static bool debug_dump_wdg; |
a929aae0 TR |
91 | module_param(debug_dump_wdg, bool, 0444); |
92 | MODULE_PARM_DESC(debug_dump_wdg, | |
93 | "Dump available WMI interfaces [0/1]"); | |
94 | ||
9599ed91 AL |
95 | static int acpi_wmi_remove(struct platform_device *device); |
96 | static int acpi_wmi_probe(struct platform_device *device); | |
bff431e4 CC |
97 | |
98 | static const struct acpi_device_id wmi_device_ids[] = { | |
99 | {"PNP0C14", 0}, | |
100 | {"pnp0c14", 0}, | |
101 | {"", 0}, | |
102 | }; | |
103 | MODULE_DEVICE_TABLE(acpi, wmi_device_ids); | |
104 | ||
9599ed91 AL |
105 | static struct platform_driver acpi_wmi_driver = { |
106 | .driver = { | |
107 | .name = "acpi-wmi", | |
108 | .acpi_match_table = wmi_device_ids, | |
c64eefd4 | 109 | }, |
9599ed91 AL |
110 | .probe = acpi_wmi_probe, |
111 | .remove = acpi_wmi_remove, | |
bff431e4 CC |
112 | }; |
113 | ||
114 | /* | |
115 | * GUID parsing functions | |
116 | */ | |
117 | ||
bff431e4 CC |
118 | static bool find_guid(const char *guid_string, struct wmi_block **out) |
119 | { | |
538d7eb8 | 120 | uuid_le guid_input; |
bff431e4 CC |
121 | struct wmi_block *wblock; |
122 | struct guid_block *block; | |
123 | struct list_head *p; | |
124 | ||
538d7eb8 AS |
125 | if (uuid_le_to_bin(guid_string, &guid_input)) |
126 | return false; | |
bff431e4 | 127 | |
762e1a2f | 128 | list_for_each(p, &wmi_block_list) { |
bff431e4 CC |
129 | wblock = list_entry(p, struct wmi_block, list); |
130 | block = &wblock->gblock; | |
131 | ||
538d7eb8 | 132 | if (memcmp(block->guid, &guid_input, 16) == 0) { |
bff431e4 CC |
133 | if (out) |
134 | *out = wblock; | |
097c27fc | 135 | return true; |
bff431e4 CC |
136 | } |
137 | } | |
097c27fc | 138 | return false; |
bff431e4 CC |
139 | } |
140 | ||
d4fc91ad AL |
141 | static int get_subobj_info(acpi_handle handle, const char *pathname, |
142 | struct acpi_device_info **info) | |
143 | { | |
144 | struct acpi_device_info *dummy_info, **info_ptr; | |
145 | acpi_handle subobj_handle; | |
146 | acpi_status status; | |
147 | ||
148 | status = acpi_get_handle(handle, (char *)pathname, &subobj_handle); | |
149 | if (status == AE_NOT_FOUND) | |
150 | return -ENOENT; | |
151 | else if (ACPI_FAILURE(status)) | |
152 | return -EIO; | |
153 | ||
154 | info_ptr = info ? info : &dummy_info; | |
155 | status = acpi_get_object_info(subobj_handle, info_ptr); | |
156 | if (ACPI_FAILURE(status)) | |
157 | return -EIO; | |
158 | ||
159 | if (!info) | |
160 | kfree(dummy_info); | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
a66bfa7a MG |
165 | static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable) |
166 | { | |
167 | struct guid_block *block = NULL; | |
168 | char method[5]; | |
a66bfa7a MG |
169 | acpi_status status; |
170 | acpi_handle handle; | |
171 | ||
172 | block = &wblock->gblock; | |
b0e86302 | 173 | handle = wblock->acpi_device->handle; |
a66bfa7a | 174 | |
a66bfa7a | 175 | snprintf(method, 5, "WE%02X", block->notify_id); |
8122ab66 | 176 | status = acpi_execute_simple_method(handle, method, enable); |
a66bfa7a MG |
177 | |
178 | if (status != AE_OK && status != AE_NOT_FOUND) | |
179 | return status; | |
180 | else | |
181 | return AE_OK; | |
182 | } | |
183 | ||
bff431e4 CC |
184 | /* |
185 | * Exported WMI functions | |
186 | */ | |
187 | /** | |
188 | * wmi_evaluate_method - Evaluate a WMI method | |
189 | * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba | |
190 | * @instance: Instance index | |
191 | * @method_id: Method ID to call | |
192 | * &in: Buffer containing input for the method call | |
193 | * &out: Empty buffer to return the method results | |
194 | * | |
195 | * Call an ACPI-WMI method | |
196 | */ | |
197 | acpi_status wmi_evaluate_method(const char *guid_string, u8 instance, | |
198 | u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out) | |
199 | { | |
200 | struct guid_block *block = NULL; | |
201 | struct wmi_block *wblock = NULL; | |
202 | acpi_handle handle; | |
203 | acpi_status status; | |
204 | struct acpi_object_list input; | |
205 | union acpi_object params[3]; | |
f3d83e24 | 206 | char method[5] = "WM"; |
bff431e4 CC |
207 | |
208 | if (!find_guid(guid_string, &wblock)) | |
08237974 | 209 | return AE_ERROR; |
bff431e4 CC |
210 | |
211 | block = &wblock->gblock; | |
b0e86302 | 212 | handle = wblock->acpi_device->handle; |
bff431e4 | 213 | |
e6bafba5 | 214 | if (!(block->flags & ACPI_WMI_METHOD)) |
bff431e4 CC |
215 | return AE_BAD_DATA; |
216 | ||
217 | if (block->instance_count < instance) | |
218 | return AE_BAD_PARAMETER; | |
219 | ||
220 | input.count = 2; | |
221 | input.pointer = params; | |
222 | params[0].type = ACPI_TYPE_INTEGER; | |
223 | params[0].integer.value = instance; | |
224 | params[1].type = ACPI_TYPE_INTEGER; | |
225 | params[1].integer.value = method_id; | |
226 | ||
227 | if (in) { | |
228 | input.count = 3; | |
229 | ||
230 | if (block->flags & ACPI_WMI_STRING) { | |
231 | params[2].type = ACPI_TYPE_STRING; | |
232 | } else { | |
233 | params[2].type = ACPI_TYPE_BUFFER; | |
234 | } | |
235 | params[2].buffer.length = in->length; | |
236 | params[2].buffer.pointer = in->pointer; | |
237 | } | |
238 | ||
239 | strncat(method, block->object_id, 2); | |
240 | ||
241 | status = acpi_evaluate_object(handle, method, &input, out); | |
242 | ||
243 | return status; | |
244 | } | |
245 | EXPORT_SYMBOL_GPL(wmi_evaluate_method); | |
246 | ||
56a37025 AL |
247 | static acpi_status __query_block(struct wmi_block *wblock, u8 instance, |
248 | struct acpi_buffer *out) | |
bff431e4 CC |
249 | { |
250 | struct guid_block *block = NULL; | |
54f14c27 | 251 | acpi_handle handle; |
bff431e4 | 252 | acpi_status status, wc_status = AE_ERROR; |
8122ab66 ZR |
253 | struct acpi_object_list input; |
254 | union acpi_object wq_params[1]; | |
f3d83e24 CL |
255 | char method[5]; |
256 | char wc_method[5] = "WC"; | |
bff431e4 | 257 | |
56a37025 | 258 | if (!out) |
bff431e4 CC |
259 | return AE_BAD_PARAMETER; |
260 | ||
bff431e4 | 261 | block = &wblock->gblock; |
b0e86302 | 262 | handle = wblock->acpi_device->handle; |
bff431e4 CC |
263 | |
264 | if (block->instance_count < instance) | |
265 | return AE_BAD_PARAMETER; | |
266 | ||
267 | /* Check GUID is a data block */ | |
268 | if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD)) | |
08237974 | 269 | return AE_ERROR; |
bff431e4 CC |
270 | |
271 | input.count = 1; | |
272 | input.pointer = wq_params; | |
273 | wq_params[0].type = ACPI_TYPE_INTEGER; | |
274 | wq_params[0].integer.value = instance; | |
275 | ||
d4fc91ad AL |
276 | if (instance == 0 && wblock->read_takes_no_args) |
277 | input.count = 0; | |
278 | ||
bff431e4 CC |
279 | /* |
280 | * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method first to | |
281 | * enable collection. | |
282 | */ | |
283 | if (block->flags & ACPI_WMI_EXPENSIVE) { | |
bff431e4 CC |
284 | strncat(wc_method, block->object_id, 2); |
285 | ||
286 | /* | |
287 | * Some GUIDs break the specification by declaring themselves | |
288 | * expensive, but have no corresponding WCxx method. So we | |
289 | * should not fail if this happens. | |
290 | */ | |
54f14c27 | 291 | if (acpi_has_method(handle, wc_method)) |
8122ab66 ZR |
292 | wc_status = acpi_execute_simple_method(handle, |
293 | wc_method, 1); | |
bff431e4 CC |
294 | } |
295 | ||
296 | strcpy(method, "WQ"); | |
297 | strncat(method, block->object_id, 2); | |
298 | ||
dab36ad8 | 299 | status = acpi_evaluate_object(handle, method, &input, out); |
bff431e4 CC |
300 | |
301 | /* | |
302 | * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method, even if | |
303 | * the WQxx method failed - we should disable collection anyway. | |
304 | */ | |
a527f2d7 | 305 | if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) { |
8122ab66 | 306 | status = acpi_execute_simple_method(handle, wc_method, 0); |
bff431e4 CC |
307 | } |
308 | ||
309 | return status; | |
310 | } | |
56a37025 AL |
311 | |
312 | /** | |
313 | * wmi_query_block - Return contents of a WMI block (deprecated) | |
314 | * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba | |
315 | * @instance: Instance index | |
316 | * &out: Empty buffer to return the contents of the data block to | |
317 | * | |
318 | * Return the contents of an ACPI-WMI data block to a buffer | |
319 | */ | |
320 | acpi_status wmi_query_block(const char *guid_string, u8 instance, | |
321 | struct acpi_buffer *out) | |
322 | { | |
323 | struct wmi_block *wblock; | |
324 | ||
325 | if (!guid_string) | |
326 | return AE_BAD_PARAMETER; | |
327 | ||
328 | if (!find_guid(guid_string, &wblock)) | |
329 | return AE_ERROR; | |
330 | ||
331 | return __query_block(wblock, instance, out); | |
332 | } | |
bff431e4 CC |
333 | EXPORT_SYMBOL_GPL(wmi_query_block); |
334 | ||
56a37025 AL |
335 | union acpi_object *wmidev_block_query(struct wmi_device *wdev, u8 instance) |
336 | { | |
337 | struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL }; | |
338 | struct wmi_block *wblock = container_of(wdev, struct wmi_block, dev); | |
339 | ||
340 | if (ACPI_FAILURE(__query_block(wblock, instance, &out))) | |
341 | return NULL; | |
342 | ||
343 | return (union acpi_object *)out.pointer; | |
344 | } | |
345 | EXPORT_SYMBOL_GPL(wmidev_block_query); | |
346 | ||
f6301986 AL |
347 | struct wmi_device *wmidev_get_other_guid(struct wmi_device *wdev, |
348 | const char *guid_string) | |
349 | { | |
350 | struct wmi_block *this_wb = container_of(wdev, struct wmi_block, dev); | |
351 | struct wmi_block *other_wb; | |
352 | ||
353 | if (!find_guid(guid_string, &other_wb)) | |
354 | return NULL; | |
355 | ||
356 | if (other_wb->acpi_device != this_wb->acpi_device) | |
357 | return NULL; | |
358 | ||
359 | get_device(&other_wb->dev.dev); | |
360 | return &other_wb->dev; | |
361 | } | |
362 | EXPORT_SYMBOL_GPL(wmidev_get_other_guid); | |
363 | ||
bff431e4 CC |
364 | /** |
365 | * wmi_set_block - Write to a WMI block | |
366 | * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba | |
367 | * @instance: Instance index | |
368 | * &in: Buffer containing new values for the data block | |
369 | * | |
370 | * Write the contents of the input buffer to an ACPI-WMI data block | |
371 | */ | |
372 | acpi_status wmi_set_block(const char *guid_string, u8 instance, | |
56a37025 | 373 | const struct acpi_buffer *in) |
bff431e4 CC |
374 | { |
375 | struct guid_block *block = NULL; | |
376 | struct wmi_block *wblock = NULL; | |
377 | acpi_handle handle; | |
378 | struct acpi_object_list input; | |
379 | union acpi_object params[2]; | |
f3d83e24 | 380 | char method[5] = "WS"; |
bff431e4 CC |
381 | |
382 | if (!guid_string || !in) | |
383 | return AE_BAD_DATA; | |
384 | ||
385 | if (!find_guid(guid_string, &wblock)) | |
08237974 | 386 | return AE_ERROR; |
bff431e4 CC |
387 | |
388 | block = &wblock->gblock; | |
b0e86302 | 389 | handle = wblock->acpi_device->handle; |
bff431e4 CC |
390 | |
391 | if (block->instance_count < instance) | |
392 | return AE_BAD_PARAMETER; | |
393 | ||
394 | /* Check GUID is a data block */ | |
395 | if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD)) | |
08237974 | 396 | return AE_ERROR; |
bff431e4 CC |
397 | |
398 | input.count = 2; | |
399 | input.pointer = params; | |
400 | params[0].type = ACPI_TYPE_INTEGER; | |
401 | params[0].integer.value = instance; | |
402 | ||
403 | if (block->flags & ACPI_WMI_STRING) { | |
404 | params[1].type = ACPI_TYPE_STRING; | |
405 | } else { | |
406 | params[1].type = ACPI_TYPE_BUFFER; | |
407 | } | |
408 | params[1].buffer.length = in->length; | |
409 | params[1].buffer.pointer = in->pointer; | |
410 | ||
411 | strncat(method, block->object_id, 2); | |
412 | ||
413 | return acpi_evaluate_object(handle, method, &input, NULL); | |
414 | } | |
415 | EXPORT_SYMBOL_GPL(wmi_set_block); | |
416 | ||
37830662 | 417 | static void wmi_dump_wdg(const struct guid_block *g) |
a929aae0 | 418 | { |
85b4e4eb | 419 | pr_info("%pUL:\n", g->guid); |
8e07514d DT |
420 | pr_info("\tobject_id: %c%c\n", g->object_id[0], g->object_id[1]); |
421 | pr_info("\tnotify_id: %02X\n", g->notify_id); | |
422 | pr_info("\treserved: %02X\n", g->reserved); | |
423 | pr_info("\tinstance_count: %d\n", g->instance_count); | |
dd8e908e | 424 | pr_info("\tflags: %#x", g->flags); |
a929aae0 | 425 | if (g->flags) { |
a929aae0 | 426 | if (g->flags & ACPI_WMI_EXPENSIVE) |
dd8e908e | 427 | pr_cont(" ACPI_WMI_EXPENSIVE"); |
a929aae0 | 428 | if (g->flags & ACPI_WMI_METHOD) |
dd8e908e | 429 | pr_cont(" ACPI_WMI_METHOD"); |
a929aae0 | 430 | if (g->flags & ACPI_WMI_STRING) |
dd8e908e | 431 | pr_cont(" ACPI_WMI_STRING"); |
a929aae0 | 432 | if (g->flags & ACPI_WMI_EVENT) |
dd8e908e | 433 | pr_cont(" ACPI_WMI_EVENT"); |
a929aae0 | 434 | } |
8e07514d | 435 | pr_cont("\n"); |
a929aae0 TR |
436 | |
437 | } | |
438 | ||
fc3155b2 TR |
439 | static void wmi_notify_debug(u32 value, void *context) |
440 | { | |
441 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
442 | union acpi_object *obj; | |
1492616a | 443 | acpi_status status; |
fc3155b2 | 444 | |
1492616a AL |
445 | status = wmi_get_event_data(value, &response); |
446 | if (status != AE_OK) { | |
8e07514d | 447 | pr_info("bad event status 0x%x\n", status); |
1492616a AL |
448 | return; |
449 | } | |
fc3155b2 TR |
450 | |
451 | obj = (union acpi_object *)response.pointer; | |
452 | ||
453 | if (!obj) | |
454 | return; | |
455 | ||
8e07514d | 456 | pr_info("DEBUG Event "); |
fc3155b2 TR |
457 | switch(obj->type) { |
458 | case ACPI_TYPE_BUFFER: | |
8e07514d | 459 | pr_cont("BUFFER_TYPE - length %d\n", obj->buffer.length); |
fc3155b2 TR |
460 | break; |
461 | case ACPI_TYPE_STRING: | |
8e07514d | 462 | pr_cont("STRING_TYPE - %s\n", obj->string.pointer); |
fc3155b2 TR |
463 | break; |
464 | case ACPI_TYPE_INTEGER: | |
8e07514d | 465 | pr_cont("INTEGER_TYPE - %llu\n", obj->integer.value); |
fc3155b2 TR |
466 | break; |
467 | case ACPI_TYPE_PACKAGE: | |
8e07514d | 468 | pr_cont("PACKAGE_TYPE - %d elements\n", obj->package.count); |
fc3155b2 TR |
469 | break; |
470 | default: | |
8e07514d | 471 | pr_cont("object type 0x%X\n", obj->type); |
fc3155b2 | 472 | } |
1492616a | 473 | kfree(obj); |
fc3155b2 TR |
474 | } |
475 | ||
bff431e4 CC |
476 | /** |
477 | * wmi_install_notify_handler - Register handler for WMI events | |
478 | * @handler: Function to handle notifications | |
479 | * @data: Data to be returned to handler when event is fired | |
480 | * | |
481 | * Register a handler for events sent to the ACPI-WMI mapper device. | |
482 | */ | |
483 | acpi_status wmi_install_notify_handler(const char *guid, | |
484 | wmi_notify_handler handler, void *data) | |
485 | { | |
486 | struct wmi_block *block; | |
58f6425e | 487 | acpi_status status = AE_NOT_EXIST; |
538d7eb8 | 488 | uuid_le guid_input; |
58f6425e | 489 | struct list_head *p; |
bff431e4 CC |
490 | |
491 | if (!guid || !handler) | |
492 | return AE_BAD_PARAMETER; | |
493 | ||
538d7eb8 AS |
494 | if (uuid_le_to_bin(guid, &guid_input)) |
495 | return AE_BAD_PARAMETER; | |
bff431e4 | 496 | |
58f6425e CK |
497 | list_for_each(p, &wmi_block_list) { |
498 | acpi_status wmi_status; | |
499 | block = list_entry(p, struct wmi_block, list); | |
500 | ||
538d7eb8 | 501 | if (memcmp(block->gblock.guid, &guid_input, 16) == 0) { |
58f6425e CK |
502 | if (block->handler && |
503 | block->handler != wmi_notify_debug) | |
504 | return AE_ALREADY_ACQUIRED; | |
bff431e4 | 505 | |
58f6425e CK |
506 | block->handler = handler; |
507 | block->handler_data = data; | |
bff431e4 | 508 | |
58f6425e CK |
509 | wmi_status = wmi_method_enable(block, 1); |
510 | if ((wmi_status != AE_OK) || | |
511 | ((wmi_status == AE_OK) && (status == AE_NOT_EXIST))) | |
512 | status = wmi_status; | |
513 | } | |
514 | } | |
a66bfa7a MG |
515 | |
516 | return status; | |
bff431e4 CC |
517 | } |
518 | EXPORT_SYMBOL_GPL(wmi_install_notify_handler); | |
519 | ||
520 | /** | |
521 | * wmi_uninstall_notify_handler - Unregister handler for WMI events | |
522 | * | |
523 | * Unregister handler for events sent to the ACPI-WMI mapper device. | |
524 | */ | |
525 | acpi_status wmi_remove_notify_handler(const char *guid) | |
526 | { | |
527 | struct wmi_block *block; | |
58f6425e | 528 | acpi_status status = AE_NOT_EXIST; |
538d7eb8 | 529 | uuid_le guid_input; |
58f6425e | 530 | struct list_head *p; |
bff431e4 CC |
531 | |
532 | if (!guid) | |
533 | return AE_BAD_PARAMETER; | |
534 | ||
538d7eb8 AS |
535 | if (uuid_le_to_bin(guid, &guid_input)) |
536 | return AE_BAD_PARAMETER; | |
bff431e4 | 537 | |
58f6425e CK |
538 | list_for_each(p, &wmi_block_list) { |
539 | acpi_status wmi_status; | |
540 | block = list_entry(p, struct wmi_block, list); | |
541 | ||
538d7eb8 | 542 | if (memcmp(block->gblock.guid, &guid_input, 16) == 0) { |
58f6425e CK |
543 | if (!block->handler || |
544 | block->handler == wmi_notify_debug) | |
545 | return AE_NULL_ENTRY; | |
546 | ||
547 | if (debug_event) { | |
548 | block->handler = wmi_notify_debug; | |
549 | status = AE_OK; | |
550 | } else { | |
551 | wmi_status = wmi_method_enable(block, 0); | |
552 | block->handler = NULL; | |
553 | block->handler_data = NULL; | |
554 | if ((wmi_status != AE_OK) || | |
555 | ((wmi_status == AE_OK) && | |
556 | (status == AE_NOT_EXIST))) | |
557 | status = wmi_status; | |
558 | } | |
559 | } | |
fc3155b2 | 560 | } |
58f6425e | 561 | |
a66bfa7a | 562 | return status; |
bff431e4 CC |
563 | } |
564 | EXPORT_SYMBOL_GPL(wmi_remove_notify_handler); | |
565 | ||
566 | /** | |
567 | * wmi_get_event_data - Get WMI data associated with an event | |
568 | * | |
3e9b988e AA |
569 | * @event: Event to find |
570 | * @out: Buffer to hold event data. out->pointer should be freed with kfree() | |
bff431e4 CC |
571 | * |
572 | * Returns extra data associated with an event in WMI. | |
573 | */ | |
574 | acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out) | |
575 | { | |
576 | struct acpi_object_list input; | |
577 | union acpi_object params[1]; | |
578 | struct guid_block *gblock; | |
579 | struct wmi_block *wblock; | |
580 | struct list_head *p; | |
581 | ||
582 | input.count = 1; | |
583 | input.pointer = params; | |
584 | params[0].type = ACPI_TYPE_INTEGER; | |
585 | params[0].integer.value = event; | |
586 | ||
762e1a2f | 587 | list_for_each(p, &wmi_block_list) { |
bff431e4 CC |
588 | wblock = list_entry(p, struct wmi_block, list); |
589 | gblock = &wblock->gblock; | |
590 | ||
591 | if ((gblock->flags & ACPI_WMI_EVENT) && | |
592 | (gblock->notify_id == event)) | |
b0e86302 AL |
593 | return acpi_evaluate_object(wblock->acpi_device->handle, |
594 | "_WED", &input, out); | |
bff431e4 CC |
595 | } |
596 | ||
597 | return AE_NOT_FOUND; | |
598 | } | |
599 | EXPORT_SYMBOL_GPL(wmi_get_event_data); | |
600 | ||
601 | /** | |
602 | * wmi_has_guid - Check if a GUID is available | |
603 | * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba | |
604 | * | |
605 | * Check if a given GUID is defined by _WDG | |
606 | */ | |
607 | bool wmi_has_guid(const char *guid_string) | |
608 | { | |
609 | return find_guid(guid_string, NULL); | |
610 | } | |
611 | EXPORT_SYMBOL_GPL(wmi_has_guid); | |
612 | ||
844af950 AL |
613 | static struct wmi_block *dev_to_wblock(struct device *dev) |
614 | { | |
615 | return container_of(dev, struct wmi_block, dev.dev); | |
616 | } | |
617 | ||
618 | static struct wmi_device *dev_to_wdev(struct device *dev) | |
619 | { | |
620 | return container_of(dev, struct wmi_device, dev); | |
621 | } | |
622 | ||
1caab3c1 MG |
623 | /* |
624 | * sysfs interface | |
625 | */ | |
614ef432 | 626 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
1caab3c1 MG |
627 | char *buf) |
628 | { | |
844af950 | 629 | struct wmi_block *wblock = dev_to_wblock(dev); |
1caab3c1 | 630 | |
85b4e4eb | 631 | return sprintf(buf, "wmi:%pUL\n", wblock->gblock.guid); |
1caab3c1 | 632 | } |
e80b89a5 | 633 | static DEVICE_ATTR_RO(modalias); |
614ef432 | 634 | |
844af950 AL |
635 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, |
636 | char *buf) | |
637 | { | |
638 | struct wmi_block *wblock = dev_to_wblock(dev); | |
639 | ||
640 | return sprintf(buf, "%pUL\n", wblock->gblock.guid); | |
641 | } | |
642 | static DEVICE_ATTR_RO(guid); | |
643 | ||
d79b1074 AL |
644 | static ssize_t instance_count_show(struct device *dev, |
645 | struct device_attribute *attr, char *buf) | |
646 | { | |
647 | struct wmi_block *wblock = dev_to_wblock(dev); | |
648 | ||
649 | return sprintf(buf, "%d\n", (int)wblock->gblock.instance_count); | |
650 | } | |
651 | static DEVICE_ATTR_RO(instance_count); | |
652 | ||
653 | static ssize_t expensive_show(struct device *dev, | |
654 | struct device_attribute *attr, char *buf) | |
655 | { | |
656 | struct wmi_block *wblock = dev_to_wblock(dev); | |
657 | ||
658 | return sprintf(buf, "%d\n", | |
659 | (wblock->gblock.flags & ACPI_WMI_EXPENSIVE) != 0); | |
660 | } | |
661 | static DEVICE_ATTR_RO(expensive); | |
662 | ||
e80b89a5 GKH |
663 | static struct attribute *wmi_attrs[] = { |
664 | &dev_attr_modalias.attr, | |
844af950 | 665 | &dev_attr_guid.attr, |
d79b1074 AL |
666 | &dev_attr_instance_count.attr, |
667 | &dev_attr_expensive.attr, | |
e80b89a5 | 668 | NULL, |
614ef432 | 669 | }; |
e80b89a5 | 670 | ATTRIBUTE_GROUPS(wmi); |
1caab3c1 | 671 | |
d79b1074 AL |
672 | static ssize_t notify_id_show(struct device *dev, struct device_attribute *attr, |
673 | char *buf) | |
674 | { | |
675 | struct wmi_block *wblock = dev_to_wblock(dev); | |
676 | ||
677 | return sprintf(buf, "%02X\n", (unsigned int)wblock->gblock.notify_id); | |
678 | } | |
679 | static DEVICE_ATTR_RO(notify_id); | |
680 | ||
681 | static struct attribute *wmi_event_attrs[] = { | |
682 | &dev_attr_notify_id.attr, | |
683 | NULL, | |
684 | }; | |
685 | ATTRIBUTE_GROUPS(wmi_event); | |
686 | ||
687 | static ssize_t object_id_show(struct device *dev, struct device_attribute *attr, | |
688 | char *buf) | |
689 | { | |
690 | struct wmi_block *wblock = dev_to_wblock(dev); | |
691 | ||
692 | return sprintf(buf, "%c%c\n", wblock->gblock.object_id[0], | |
693 | wblock->gblock.object_id[1]); | |
694 | } | |
695 | static DEVICE_ATTR_RO(object_id); | |
696 | ||
fd70da6a DHV |
697 | static ssize_t setable_show(struct device *dev, struct device_attribute *attr, |
698 | char *buf) | |
d4fc91ad AL |
699 | { |
700 | struct wmi_device *wdev = dev_to_wdev(dev); | |
701 | ||
fd70da6a | 702 | return sprintf(buf, "%d\n", (int)wdev->setable); |
d4fc91ad | 703 | } |
fd70da6a | 704 | static DEVICE_ATTR_RO(setable); |
d4fc91ad AL |
705 | |
706 | static struct attribute *wmi_data_attrs[] = { | |
707 | &dev_attr_object_id.attr, | |
fd70da6a | 708 | &dev_attr_setable.attr, |
d4fc91ad AL |
709 | NULL, |
710 | }; | |
711 | ATTRIBUTE_GROUPS(wmi_data); | |
712 | ||
713 | static struct attribute *wmi_method_attrs[] = { | |
d79b1074 AL |
714 | &dev_attr_object_id.attr, |
715 | NULL, | |
716 | }; | |
d4fc91ad | 717 | ATTRIBUTE_GROUPS(wmi_method); |
d79b1074 | 718 | |
1caab3c1 MG |
719 | static int wmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env) |
720 | { | |
844af950 | 721 | struct wmi_block *wblock = dev_to_wblock(dev); |
1caab3c1 | 722 | |
844af950 | 723 | if (add_uevent_var(env, "MODALIAS=wmi:%pUL", wblock->gblock.guid)) |
1caab3c1 MG |
724 | return -ENOMEM; |
725 | ||
844af950 | 726 | if (add_uevent_var(env, "WMI_GUID=%pUL", wblock->gblock.guid)) |
1caab3c1 MG |
727 | return -ENOMEM; |
728 | ||
844af950 AL |
729 | return 0; |
730 | } | |
731 | ||
732 | static void wmi_dev_release(struct device *dev) | |
733 | { | |
734 | struct wmi_block *wblock = dev_to_wblock(dev); | |
735 | ||
736 | kfree(wblock); | |
737 | } | |
738 | ||
739 | static int wmi_dev_match(struct device *dev, struct device_driver *driver) | |
740 | { | |
741 | struct wmi_driver *wmi_driver = | |
742 | container_of(driver, struct wmi_driver, driver); | |
743 | struct wmi_block *wblock = dev_to_wblock(dev); | |
744 | const struct wmi_device_id *id = wmi_driver->id_table; | |
1caab3c1 | 745 | |
844af950 AL |
746 | while (id->guid_string) { |
747 | uuid_le driver_guid; | |
748 | ||
749 | if (WARN_ON(uuid_le_to_bin(id->guid_string, &driver_guid))) | |
750 | continue; | |
751 | if (!memcmp(&driver_guid, wblock->gblock.guid, 16)) | |
752 | return 1; | |
753 | ||
754 | id++; | |
755 | } | |
1caab3c1 MG |
756 | |
757 | return 0; | |
758 | } | |
759 | ||
844af950 | 760 | static int wmi_dev_probe(struct device *dev) |
1caab3c1 | 761 | { |
844af950 AL |
762 | struct wmi_block *wblock = dev_to_wblock(dev); |
763 | struct wmi_driver *wdriver = | |
764 | container_of(dev->driver, struct wmi_driver, driver); | |
765 | int ret = 0; | |
766 | ||
767 | if (ACPI_FAILURE(wmi_method_enable(wblock, 1))) | |
768 | dev_warn(dev, "failed to enable device -- probing anyway\n"); | |
769 | ||
770 | if (wdriver->probe) { | |
771 | ret = wdriver->probe(dev_to_wdev(dev)); | |
772 | if (ret != 0 && ACPI_FAILURE(wmi_method_enable(wblock, 0))) | |
773 | dev_warn(dev, "failed to disable device\n"); | |
774 | } | |
775 | ||
776 | return ret; | |
777 | } | |
778 | ||
779 | static int wmi_dev_remove(struct device *dev) | |
780 | { | |
781 | struct wmi_block *wblock = dev_to_wblock(dev); | |
782 | struct wmi_driver *wdriver = | |
783 | container_of(dev->driver, struct wmi_driver, driver); | |
784 | int ret = 0; | |
785 | ||
786 | if (wdriver->remove) | |
787 | ret = wdriver->remove(dev_to_wdev(dev)); | |
788 | ||
789 | if (ACPI_FAILURE(wmi_method_enable(wblock, 0))) | |
790 | dev_warn(dev, "failed to disable device\n"); | |
c64eefd4 | 791 | |
844af950 | 792 | return ret; |
1caab3c1 MG |
793 | } |
794 | ||
844af950 AL |
795 | static struct class wmi_bus_class = { |
796 | .name = "wmi_bus", | |
797 | }; | |
798 | ||
799 | static struct bus_type wmi_bus_type = { | |
1caab3c1 | 800 | .name = "wmi", |
e80b89a5 | 801 | .dev_groups = wmi_groups, |
844af950 AL |
802 | .match = wmi_dev_match, |
803 | .uevent = wmi_dev_uevent, | |
804 | .probe = wmi_dev_probe, | |
805 | .remove = wmi_dev_remove, | |
1caab3c1 MG |
806 | }; |
807 | ||
d79b1074 AL |
808 | static struct device_type wmi_type_event = { |
809 | .name = "event", | |
810 | .groups = wmi_event_groups, | |
811 | .release = wmi_dev_release, | |
812 | }; | |
813 | ||
814 | static struct device_type wmi_type_method = { | |
815 | .name = "method", | |
d4fc91ad | 816 | .groups = wmi_method_groups, |
d79b1074 AL |
817 | .release = wmi_dev_release, |
818 | }; | |
819 | ||
820 | static struct device_type wmi_type_data = { | |
821 | .name = "data", | |
d4fc91ad | 822 | .groups = wmi_data_groups, |
d79b1074 AL |
823 | .release = wmi_dev_release, |
824 | }; | |
825 | ||
fd70da6a | 826 | static int wmi_create_device(struct device *wmi_bus_dev, |
844af950 | 827 | const struct guid_block *gblock, |
7f5809bf AL |
828 | struct wmi_block *wblock, |
829 | struct acpi_device *device) | |
1caab3c1 | 830 | { |
fd70da6a DHV |
831 | struct acpi_device_info *info; |
832 | char method[5]; | |
833 | int result; | |
1caab3c1 | 834 | |
d79b1074 AL |
835 | if (gblock->flags & ACPI_WMI_EVENT) { |
836 | wblock->dev.dev.type = &wmi_type_event; | |
fd70da6a DHV |
837 | goto out_init; |
838 | } | |
839 | ||
840 | if (gblock->flags & ACPI_WMI_METHOD) { | |
d79b1074 | 841 | wblock->dev.dev.type = &wmi_type_method; |
fd70da6a DHV |
842 | goto out_init; |
843 | } | |
d4fc91ad | 844 | |
fd70da6a DHV |
845 | /* |
846 | * Data Block Query Control Method (WQxx by convention) is | |
847 | * required per the WMI documentation. If it is not present, | |
848 | * we ignore this data block. | |
849 | */ | |
850 | strcpy(method, "WQ"); | |
851 | strncat(method, wblock->gblock.object_id, 2); | |
852 | result = get_subobj_info(device->handle, method, &info); | |
853 | ||
854 | if (result) { | |
855 | dev_warn(wmi_bus_dev, | |
856 | "%s data block query control method not found", | |
857 | method); | |
858 | return result; | |
859 | } | |
d4fc91ad | 860 | |
fd70da6a | 861 | wblock->dev.dev.type = &wmi_type_data; |
d4fc91ad | 862 | |
fd70da6a DHV |
863 | /* |
864 | * The Microsoft documentation specifically states: | |
865 | * | |
866 | * Data blocks registered with only a single instance | |
867 | * can ignore the parameter. | |
868 | * | |
869 | * ACPICA will get mad at us if we call the method with the wrong number | |
870 | * of arguments, so check what our method expects. (On some Dell | |
871 | * laptops, WQxx may not be a method at all.) | |
872 | */ | |
873 | if (info->type != ACPI_TYPE_METHOD || info->param_count == 0) | |
874 | wblock->read_takes_no_args = true; | |
d4fc91ad | 875 | |
fd70da6a | 876 | kfree(info); |
d4fc91ad | 877 | |
fd70da6a DHV |
878 | strcpy(method, "WS"); |
879 | strncat(method, wblock->gblock.object_id, 2); | |
880 | result = get_subobj_info(device->handle, method, NULL); | |
d4fc91ad | 881 | |
fd70da6a DHV |
882 | if (result == 0) |
883 | wblock->dev.setable = true; | |
d4fc91ad | 884 | |
fd70da6a DHV |
885 | out_init: |
886 | wblock->dev.dev.bus = &wmi_bus_type; | |
887 | wblock->dev.dev.parent = wmi_bus_dev; | |
d4fc91ad | 888 | |
fd70da6a | 889 | dev_set_name(&wblock->dev.dev, "%pUL", gblock->guid); |
1caab3c1 | 890 | |
6ee50aaa | 891 | device_initialize(&wblock->dev.dev); |
fd70da6a DHV |
892 | |
893 | return 0; | |
1caab3c1 MG |
894 | } |
895 | ||
b0e86302 | 896 | static void wmi_free_devices(struct acpi_device *device) |
1caab3c1 | 897 | { |
c64eefd4 | 898 | struct wmi_block *wblock, *next; |
1caab3c1 MG |
899 | |
900 | /* Delete devices for all the GUIDs */ | |
023b9565 | 901 | list_for_each_entry_safe(wblock, next, &wmi_block_list, list) { |
b0e86302 AL |
902 | if (wblock->acpi_device == device) { |
903 | list_del(&wblock->list); | |
6ee50aaa | 904 | device_unregister(&wblock->dev.dev); |
b0e86302 | 905 | } |
023b9565 | 906 | } |
1caab3c1 MG |
907 | } |
908 | ||
b0e86302 AL |
909 | static bool guid_already_parsed(struct acpi_device *device, |
910 | const u8 *guid) | |
d1f9e497 | 911 | { |
d1f9e497 | 912 | struct wmi_block *wblock; |
d1f9e497 | 913 | |
b0e86302 AL |
914 | list_for_each_entry(wblock, &wmi_block_list, list) { |
915 | if (memcmp(wblock->gblock.guid, guid, 16) == 0) { | |
916 | /* | |
917 | * Because we historically didn't track the relationship | |
918 | * between GUIDs and ACPI nodes, we don't know whether | |
919 | * we need to suppress GUIDs that are unique on a | |
920 | * given node but duplicated across nodes. | |
921 | */ | |
922 | dev_warn(&device->dev, "duplicate WMI GUID %pUL (first instance was on %s)\n", | |
923 | guid, dev_name(&wblock->acpi_device->dev)); | |
d1f9e497 | 924 | return true; |
b0e86302 AL |
925 | } |
926 | } | |
d1f9e497 | 927 | |
c64eefd4 | 928 | return false; |
2d5ab555 DT |
929 | } |
930 | ||
bff431e4 CC |
931 | /* |
932 | * Parse the _WDG method for the GUID data blocks | |
933 | */ | |
844af950 | 934 | static int parse_wdg(struct device *wmi_bus_dev, struct acpi_device *device) |
bff431e4 CC |
935 | { |
936 | struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL}; | |
37830662 | 937 | const struct guid_block *gblock; |
6ee50aaa DHV |
938 | struct wmi_block *wblock, *next; |
939 | union acpi_object *obj; | |
bff431e4 | 940 | acpi_status status; |
6ee50aaa | 941 | int retval = 0; |
bff431e4 CC |
942 | u32 i, total; |
943 | ||
7f5809bf | 944 | status = acpi_evaluate_object(device->handle, "_WDG", NULL, &out); |
bff431e4 | 945 | if (ACPI_FAILURE(status)) |
c64eefd4 | 946 | return -ENXIO; |
bff431e4 CC |
947 | |
948 | obj = (union acpi_object *) out.pointer; | |
3d2c63eb | 949 | if (!obj) |
c64eefd4 | 950 | return -ENXIO; |
bff431e4 | 951 | |
64ed0ab8 | 952 | if (obj->type != ACPI_TYPE_BUFFER) { |
c64eefd4 | 953 | retval = -ENXIO; |
64ed0ab8 DT |
954 | goto out_free_pointer; |
955 | } | |
bff431e4 | 956 | |
37830662 | 957 | gblock = (const struct guid_block *)obj->buffer.pointer; |
bff431e4 CC |
958 | total = obj->buffer.length / sizeof(struct guid_block); |
959 | ||
bff431e4 | 960 | for (i = 0; i < total; i++) { |
58f6425e CK |
961 | if (debug_dump_wdg) |
962 | wmi_dump_wdg(&gblock[i]); | |
963 | ||
a1c31bcd AL |
964 | /* |
965 | * Some WMI devices, like those for nVidia hooks, have a | |
966 | * duplicate GUID. It's not clear what we should do in this | |
967 | * case yet, so for now, we'll just ignore the duplicate | |
968 | * for device creation. | |
969 | */ | |
970 | if (guid_already_parsed(device, gblock[i].guid)) | |
971 | continue; | |
972 | ||
58f6425e | 973 | wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL); |
6ee50aaa DHV |
974 | if (!wblock) { |
975 | retval = -ENOMEM; | |
976 | break; | |
977 | } | |
58f6425e | 978 | |
b0e86302 | 979 | wblock->acpi_device = device; |
58f6425e CK |
980 | wblock->gblock = gblock[i]; |
981 | ||
fd70da6a DHV |
982 | retval = wmi_create_device(wmi_bus_dev, &gblock[i], wblock, device); |
983 | if (retval) { | |
984 | kfree(wblock); | |
985 | continue; | |
986 | } | |
c64eefd4 | 987 | |
58f6425e | 988 | list_add_tail(&wblock->list, &wmi_block_list); |
bff431e4 | 989 | |
fc3155b2 TR |
990 | if (debug_event) { |
991 | wblock->handler = wmi_notify_debug; | |
2d5ab555 | 992 | wmi_method_enable(wblock, 1); |
fc3155b2 | 993 | } |
bff431e4 CC |
994 | } |
995 | ||
6ee50aaa DHV |
996 | /* |
997 | * Now that all of the devices are created, add them to the | |
998 | * device tree and probe subdrivers. | |
999 | */ | |
1000 | list_for_each_entry_safe(wblock, next, &wmi_block_list, list) { | |
1001 | if (wblock->acpi_device != device) | |
1002 | continue; | |
1003 | ||
1004 | retval = device_add(&wblock->dev.dev); | |
1005 | if (retval) { | |
1006 | dev_err(wmi_bus_dev, "failed to register %pULL\n", | |
1007 | wblock->gblock.guid); | |
1008 | if (debug_event) | |
1009 | wmi_method_enable(wblock, 0); | |
1010 | list_del(&wblock->list); | |
1011 | put_device(&wblock->dev.dev); | |
1012 | } | |
1013 | } | |
c64eefd4 | 1014 | |
a5167c5b AL |
1015 | out_free_pointer: |
1016 | kfree(out.pointer); | |
c64eefd4 | 1017 | return retval; |
bff431e4 CC |
1018 | } |
1019 | ||
1020 | /* | |
1021 | * WMI can have EmbeddedControl access regions. In which case, we just want to | |
1022 | * hand these off to the EC driver. | |
1023 | */ | |
1024 | static acpi_status | |
1025 | acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address, | |
439913ff | 1026 | u32 bits, u64 *value, |
bff431e4 CC |
1027 | void *handler_context, void *region_context) |
1028 | { | |
1029 | int result = 0, i = 0; | |
1030 | u8 temp = 0; | |
1031 | ||
1032 | if ((address > 0xFF) || !value) | |
1033 | return AE_BAD_PARAMETER; | |
1034 | ||
1035 | if (function != ACPI_READ && function != ACPI_WRITE) | |
1036 | return AE_BAD_PARAMETER; | |
1037 | ||
1038 | if (bits != 8) | |
1039 | return AE_BAD_PARAMETER; | |
1040 | ||
1041 | if (function == ACPI_READ) { | |
1042 | result = ec_read(address, &temp); | |
439913ff | 1043 | (*value) |= ((u64)temp) << i; |
bff431e4 CC |
1044 | } else { |
1045 | temp = 0xff & ((*value) >> i); | |
1046 | result = ec_write(address, temp); | |
1047 | } | |
1048 | ||
1049 | switch (result) { | |
1050 | case -EINVAL: | |
1051 | return AE_BAD_PARAMETER; | |
1052 | break; | |
1053 | case -ENODEV: | |
1054 | return AE_NOT_FOUND; | |
1055 | break; | |
1056 | case -ETIME: | |
1057 | return AE_TIME; | |
1058 | break; | |
1059 | default: | |
1060 | return AE_OK; | |
1061 | } | |
1062 | } | |
1063 | ||
1686f544 AL |
1064 | static void acpi_wmi_notify_handler(acpi_handle handle, u32 event, |
1065 | void *context) | |
bff431e4 CC |
1066 | { |
1067 | struct guid_block *block; | |
1068 | struct wmi_block *wblock; | |
1069 | struct list_head *p; | |
1686f544 | 1070 | bool found_it = false; |
bff431e4 | 1071 | |
762e1a2f | 1072 | list_for_each(p, &wmi_block_list) { |
bff431e4 CC |
1073 | wblock = list_entry(p, struct wmi_block, list); |
1074 | block = &wblock->gblock; | |
1075 | ||
1686f544 | 1076 | if (wblock->acpi_device->handle == handle && |
b0e86302 | 1077 | (block->flags & ACPI_WMI_EVENT) && |
1686f544 AL |
1078 | (block->notify_id == event)) |
1079 | { | |
1080 | found_it = true; | |
bff431e4 CC |
1081 | break; |
1082 | } | |
1083 | } | |
1686f544 AL |
1084 | |
1085 | if (!found_it) | |
1086 | return; | |
1087 | ||
1088 | /* If a driver is bound, then notify the driver. */ | |
1089 | if (wblock->dev.dev.driver) { | |
1090 | struct wmi_driver *driver; | |
1091 | struct acpi_object_list input; | |
1092 | union acpi_object params[1]; | |
1093 | struct acpi_buffer evdata = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1094 | acpi_status status; | |
1095 | ||
1096 | driver = container_of(wblock->dev.dev.driver, | |
1097 | struct wmi_driver, driver); | |
1098 | ||
1099 | input.count = 1; | |
1100 | input.pointer = params; | |
1101 | params[0].type = ACPI_TYPE_INTEGER; | |
1102 | params[0].integer.value = event; | |
1103 | ||
1104 | status = acpi_evaluate_object(wblock->acpi_device->handle, | |
1105 | "_WED", &input, &evdata); | |
1106 | if (ACPI_FAILURE(status)) { | |
1107 | dev_warn(&wblock->dev.dev, | |
1108 | "failed to get event data\n"); | |
1109 | return; | |
1110 | } | |
1111 | ||
1112 | if (driver->notify) | |
1113 | driver->notify(&wblock->dev, | |
1114 | (union acpi_object *)evdata.pointer); | |
1115 | ||
1116 | kfree(evdata.pointer); | |
1117 | } else if (wblock->handler) { | |
1118 | /* Legacy handler */ | |
1119 | wblock->handler(event, wblock->handler_data); | |
1120 | } | |
1121 | ||
1122 | if (debug_event) { | |
1123 | pr_info("DEBUG Event GUID: %pUL\n", | |
1124 | wblock->gblock.guid); | |
1125 | } | |
1126 | ||
1127 | acpi_bus_generate_netlink_event( | |
1128 | wblock->acpi_device->pnp.device_class, | |
1129 | dev_name(&wblock->dev.dev), | |
1130 | event, 0); | |
1131 | ||
bff431e4 CC |
1132 | } |
1133 | ||
9599ed91 | 1134 | static int acpi_wmi_remove(struct platform_device *device) |
bff431e4 | 1135 | { |
9599ed91 AL |
1136 | struct acpi_device *acpi_device = ACPI_COMPANION(&device->dev); |
1137 | ||
1138 | acpi_remove_notify_handler(acpi_device->handle, ACPI_DEVICE_NOTIFY, | |
1686f544 | 1139 | acpi_wmi_notify_handler); |
9599ed91 | 1140 | acpi_remove_address_space_handler(acpi_device->handle, |
bff431e4 | 1141 | ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler); |
9599ed91 AL |
1142 | wmi_free_devices(acpi_device); |
1143 | device_unregister((struct device *)dev_get_drvdata(&device->dev)); | |
bff431e4 CC |
1144 | |
1145 | return 0; | |
1146 | } | |
1147 | ||
9599ed91 | 1148 | static int acpi_wmi_probe(struct platform_device *device) |
bff431e4 | 1149 | { |
9599ed91 | 1150 | struct acpi_device *acpi_device; |
844af950 | 1151 | struct device *wmi_bus_dev; |
bff431e4 | 1152 | acpi_status status; |
c64eefd4 | 1153 | int error; |
bff431e4 | 1154 | |
9599ed91 AL |
1155 | acpi_device = ACPI_COMPANION(&device->dev); |
1156 | if (!acpi_device) { | |
1157 | dev_err(&device->dev, "ACPI companion is missing\n"); | |
1158 | return -ENODEV; | |
1159 | } | |
1160 | ||
1161 | status = acpi_install_address_space_handler(acpi_device->handle, | |
bff431e4 CC |
1162 | ACPI_ADR_SPACE_EC, |
1163 | &acpi_wmi_ec_space_handler, | |
1164 | NULL, NULL); | |
5212cd67 | 1165 | if (ACPI_FAILURE(status)) { |
46492ee4 | 1166 | dev_err(&device->dev, "Error installing EC region handler\n"); |
bff431e4 | 1167 | return -ENODEV; |
5212cd67 | 1168 | } |
bff431e4 | 1169 | |
9599ed91 AL |
1170 | status = acpi_install_notify_handler(acpi_device->handle, |
1171 | ACPI_DEVICE_NOTIFY, | |
1686f544 AL |
1172 | acpi_wmi_notify_handler, |
1173 | NULL); | |
1174 | if (ACPI_FAILURE(status)) { | |
1175 | dev_err(&device->dev, "Error installing notify handler\n"); | |
1176 | error = -ENODEV; | |
1177 | goto err_remove_ec_handler; | |
1178 | } | |
1179 | ||
844af950 AL |
1180 | wmi_bus_dev = device_create(&wmi_bus_class, &device->dev, MKDEV(0, 0), |
1181 | NULL, "wmi_bus-%s", dev_name(&device->dev)); | |
1182 | if (IS_ERR(wmi_bus_dev)) { | |
1183 | error = PTR_ERR(wmi_bus_dev); | |
1686f544 | 1184 | goto err_remove_notify_handler; |
844af950 | 1185 | } |
9599ed91 | 1186 | dev_set_drvdata(&device->dev, wmi_bus_dev); |
844af950 | 1187 | |
9599ed91 | 1188 | error = parse_wdg(wmi_bus_dev, acpi_device); |
c64eefd4 | 1189 | if (error) { |
8e07514d | 1190 | pr_err("Failed to parse WDG method\n"); |
844af950 | 1191 | goto err_remove_busdev; |
bff431e4 CC |
1192 | } |
1193 | ||
c64eefd4 | 1194 | return 0; |
46492ee4 | 1195 | |
844af950 AL |
1196 | err_remove_busdev: |
1197 | device_unregister(wmi_bus_dev); | |
1198 | ||
1686f544 | 1199 | err_remove_notify_handler: |
9599ed91 | 1200 | acpi_remove_notify_handler(acpi_device->handle, ACPI_DEVICE_NOTIFY, |
1686f544 AL |
1201 | acpi_wmi_notify_handler); |
1202 | ||
1203 | err_remove_ec_handler: | |
9599ed91 | 1204 | acpi_remove_address_space_handler(acpi_device->handle, |
46492ee4 AL |
1205 | ACPI_ADR_SPACE_EC, |
1206 | &acpi_wmi_ec_space_handler); | |
1207 | ||
1208 | return error; | |
bff431e4 CC |
1209 | } |
1210 | ||
844af950 AL |
1211 | int __must_check __wmi_driver_register(struct wmi_driver *driver, |
1212 | struct module *owner) | |
1213 | { | |
1214 | driver->driver.owner = owner; | |
1215 | driver->driver.bus = &wmi_bus_type; | |
1216 | ||
1217 | return driver_register(&driver->driver); | |
1218 | } | |
1219 | EXPORT_SYMBOL(__wmi_driver_register); | |
1220 | ||
1221 | void wmi_driver_unregister(struct wmi_driver *driver) | |
1222 | { | |
1223 | driver_unregister(&driver->driver); | |
1224 | } | |
1225 | EXPORT_SYMBOL(wmi_driver_unregister); | |
1226 | ||
bff431e4 CC |
1227 | static int __init acpi_wmi_init(void) |
1228 | { | |
c64eefd4 | 1229 | int error; |
bff431e4 CC |
1230 | |
1231 | if (acpi_disabled) | |
1232 | return -ENODEV; | |
1233 | ||
844af950 | 1234 | error = class_register(&wmi_bus_class); |
c64eefd4 DT |
1235 | if (error) |
1236 | return error; | |
1caab3c1 | 1237 | |
844af950 AL |
1238 | error = bus_register(&wmi_bus_type); |
1239 | if (error) | |
1240 | goto err_unreg_class; | |
1241 | ||
9599ed91 | 1242 | error = platform_driver_register(&acpi_wmi_driver); |
c64eefd4 DT |
1243 | if (error) { |
1244 | pr_err("Error loading mapper\n"); | |
844af950 | 1245 | goto err_unreg_bus; |
bff431e4 CC |
1246 | } |
1247 | ||
8e07514d | 1248 | return 0; |
844af950 AL |
1249 | |
1250 | err_unreg_class: | |
1251 | class_unregister(&wmi_bus_class); | |
1252 | ||
1253 | err_unreg_bus: | |
1254 | bus_unregister(&wmi_bus_type); | |
1255 | ||
1256 | return error; | |
bff431e4 CC |
1257 | } |
1258 | ||
1259 | static void __exit acpi_wmi_exit(void) | |
1260 | { | |
9599ed91 | 1261 | platform_driver_unregister(&acpi_wmi_driver); |
844af950 AL |
1262 | class_unregister(&wmi_bus_class); |
1263 | bus_unregister(&wmi_bus_type); | |
bff431e4 CC |
1264 | } |
1265 | ||
1266 | subsys_initcall(acpi_wmi_init); | |
1267 | module_exit(acpi_wmi_exit); |