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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 | * | |
2c9c5664 DHV |
11 | * WMI bus infrastructure by Andrew Lutomirski and Darren Hart: |
12 | * Copyright (C) 2015 Andrew Lutomirski | |
13 | * Copyright (C) 2017 VMware, Inc. All Rights Reserved. | |
14 | * | |
bff431e4 CC |
15 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
16 | * | |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2 of the License, or (at | |
20 | * your option) any later version. | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, but | |
23 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
25 | * General Public License for more details. | |
26 | * | |
27 | * You should have received a copy of the GNU General Public License along | |
28 | * with this program; if not, write to the Free Software Foundation, Inc., | |
29 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
30 | * | |
31 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
32 | */ | |
33 | ||
8e07514d DT |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
bff431e4 CC |
36 | #include <linux/kernel.h> |
37 | #include <linux/init.h> | |
38 | #include <linux/types.h> | |
1caab3c1 | 39 | #include <linux/device.h> |
bff431e4 CC |
40 | #include <linux/list.h> |
41 | #include <linux/acpi.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
7c52d551 | 43 | #include <linux/module.h> |
9599ed91 | 44 | #include <linux/platform_device.h> |
844af950 | 45 | #include <linux/wmi.h> |
538d7eb8 | 46 | #include <linux/uuid.h> |
bff431e4 CC |
47 | |
48 | ACPI_MODULE_NAME("wmi"); | |
49 | MODULE_AUTHOR("Carlos Corbacho"); | |
50 | MODULE_DESCRIPTION("ACPI-WMI Mapping Driver"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
762e1a2f | 53 | static LIST_HEAD(wmi_block_list); |
bff431e4 CC |
54 | |
55 | struct guid_block { | |
56 | char guid[16]; | |
57 | union { | |
58 | char object_id[2]; | |
59 | struct { | |
60 | unsigned char notify_id; | |
61 | unsigned char reserved; | |
62 | }; | |
63 | }; | |
64 | u8 instance_count; | |
65 | u8 flags; | |
66 | }; | |
67 | ||
68 | struct wmi_block { | |
844af950 | 69 | struct wmi_device dev; |
bff431e4 CC |
70 | struct list_head list; |
71 | struct guid_block gblock; | |
b0e86302 | 72 | struct acpi_device *acpi_device; |
bff431e4 CC |
73 | wmi_notify_handler handler; |
74 | void *handler_data; | |
d4fc91ad | 75 | |
fd70da6a | 76 | bool read_takes_no_args; |
bff431e4 CC |
77 | }; |
78 | ||
bff431e4 CC |
79 | |
80 | /* | |
81 | * If the GUID data block is marked as expensive, we must enable and | |
82 | * explicitily disable data collection. | |
83 | */ | |
84 | #define ACPI_WMI_EXPENSIVE 0x1 | |
85 | #define ACPI_WMI_METHOD 0x2 /* GUID is a method */ | |
86 | #define ACPI_WMI_STRING 0x4 /* GUID takes & returns a string */ | |
87 | #define ACPI_WMI_EVENT 0x8 /* GUID is an event */ | |
88 | ||
90ab5ee9 | 89 | static bool debug_event; |
fc3155b2 TR |
90 | module_param(debug_event, bool, 0444); |
91 | MODULE_PARM_DESC(debug_event, | |
92 | "Log WMI Events [0/1]"); | |
93 | ||
90ab5ee9 | 94 | static bool debug_dump_wdg; |
a929aae0 TR |
95 | module_param(debug_dump_wdg, bool, 0444); |
96 | MODULE_PARM_DESC(debug_dump_wdg, | |
97 | "Dump available WMI interfaces [0/1]"); | |
98 | ||
9599ed91 AL |
99 | static int acpi_wmi_remove(struct platform_device *device); |
100 | static int acpi_wmi_probe(struct platform_device *device); | |
bff431e4 CC |
101 | |
102 | static const struct acpi_device_id wmi_device_ids[] = { | |
103 | {"PNP0C14", 0}, | |
104 | {"pnp0c14", 0}, | |
105 | {"", 0}, | |
106 | }; | |
107 | MODULE_DEVICE_TABLE(acpi, wmi_device_ids); | |
108 | ||
9599ed91 AL |
109 | static struct platform_driver acpi_wmi_driver = { |
110 | .driver = { | |
111 | .name = "acpi-wmi", | |
112 | .acpi_match_table = wmi_device_ids, | |
c64eefd4 | 113 | }, |
9599ed91 AL |
114 | .probe = acpi_wmi_probe, |
115 | .remove = acpi_wmi_remove, | |
bff431e4 CC |
116 | }; |
117 | ||
118 | /* | |
119 | * GUID parsing functions | |
120 | */ | |
121 | ||
bff431e4 CC |
122 | static bool find_guid(const char *guid_string, struct wmi_block **out) |
123 | { | |
538d7eb8 | 124 | uuid_le guid_input; |
bff431e4 CC |
125 | struct wmi_block *wblock; |
126 | struct guid_block *block; | |
127 | struct list_head *p; | |
128 | ||
538d7eb8 AS |
129 | if (uuid_le_to_bin(guid_string, &guid_input)) |
130 | return false; | |
bff431e4 | 131 | |
762e1a2f | 132 | list_for_each(p, &wmi_block_list) { |
bff431e4 CC |
133 | wblock = list_entry(p, struct wmi_block, list); |
134 | block = &wblock->gblock; | |
135 | ||
538d7eb8 | 136 | if (memcmp(block->guid, &guid_input, 16) == 0) { |
bff431e4 CC |
137 | if (out) |
138 | *out = wblock; | |
097c27fc | 139 | return true; |
bff431e4 CC |
140 | } |
141 | } | |
097c27fc | 142 | return false; |
bff431e4 CC |
143 | } |
144 | ||
d4fc91ad AL |
145 | static int get_subobj_info(acpi_handle handle, const char *pathname, |
146 | struct acpi_device_info **info) | |
147 | { | |
148 | struct acpi_device_info *dummy_info, **info_ptr; | |
149 | acpi_handle subobj_handle; | |
150 | acpi_status status; | |
151 | ||
152 | status = acpi_get_handle(handle, (char *)pathname, &subobj_handle); | |
153 | if (status == AE_NOT_FOUND) | |
154 | return -ENOENT; | |
155 | else if (ACPI_FAILURE(status)) | |
156 | return -EIO; | |
157 | ||
158 | info_ptr = info ? info : &dummy_info; | |
159 | status = acpi_get_object_info(subobj_handle, info_ptr); | |
160 | if (ACPI_FAILURE(status)) | |
161 | return -EIO; | |
162 | ||
163 | if (!info) | |
164 | kfree(dummy_info); | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
a66bfa7a MG |
169 | static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable) |
170 | { | |
171 | struct guid_block *block = NULL; | |
172 | char method[5]; | |
a66bfa7a MG |
173 | acpi_status status; |
174 | acpi_handle handle; | |
175 | ||
176 | block = &wblock->gblock; | |
b0e86302 | 177 | handle = wblock->acpi_device->handle; |
a66bfa7a | 178 | |
a66bfa7a | 179 | snprintf(method, 5, "WE%02X", block->notify_id); |
8122ab66 | 180 | status = acpi_execute_simple_method(handle, method, enable); |
a66bfa7a MG |
181 | |
182 | if (status != AE_OK && status != AE_NOT_FOUND) | |
183 | return status; | |
184 | else | |
185 | return AE_OK; | |
186 | } | |
187 | ||
bff431e4 CC |
188 | /* |
189 | * Exported WMI functions | |
190 | */ | |
191 | /** | |
192 | * wmi_evaluate_method - Evaluate a WMI method | |
193 | * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba | |
194 | * @instance: Instance index | |
195 | * @method_id: Method ID to call | |
196 | * &in: Buffer containing input for the method call | |
197 | * &out: Empty buffer to return the method results | |
198 | * | |
199 | * Call an ACPI-WMI method | |
200 | */ | |
201 | acpi_status wmi_evaluate_method(const char *guid_string, u8 instance, | |
202 | u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out) | |
203 | { | |
204 | struct guid_block *block = NULL; | |
205 | struct wmi_block *wblock = NULL; | |
206 | acpi_handle handle; | |
207 | acpi_status status; | |
208 | struct acpi_object_list input; | |
209 | union acpi_object params[3]; | |
f3d83e24 | 210 | char method[5] = "WM"; |
bff431e4 CC |
211 | |
212 | if (!find_guid(guid_string, &wblock)) | |
08237974 | 213 | return AE_ERROR; |
bff431e4 CC |
214 | |
215 | block = &wblock->gblock; | |
b0e86302 | 216 | handle = wblock->acpi_device->handle; |
bff431e4 | 217 | |
e6bafba5 | 218 | if (!(block->flags & ACPI_WMI_METHOD)) |
bff431e4 CC |
219 | return AE_BAD_DATA; |
220 | ||
221 | if (block->instance_count < instance) | |
222 | return AE_BAD_PARAMETER; | |
223 | ||
224 | input.count = 2; | |
225 | input.pointer = params; | |
226 | params[0].type = ACPI_TYPE_INTEGER; | |
227 | params[0].integer.value = instance; | |
228 | params[1].type = ACPI_TYPE_INTEGER; | |
229 | params[1].integer.value = method_id; | |
230 | ||
231 | if (in) { | |
232 | input.count = 3; | |
233 | ||
234 | if (block->flags & ACPI_WMI_STRING) { | |
235 | params[2].type = ACPI_TYPE_STRING; | |
236 | } else { | |
237 | params[2].type = ACPI_TYPE_BUFFER; | |
238 | } | |
239 | params[2].buffer.length = in->length; | |
240 | params[2].buffer.pointer = in->pointer; | |
241 | } | |
242 | ||
243 | strncat(method, block->object_id, 2); | |
244 | ||
245 | status = acpi_evaluate_object(handle, method, &input, out); | |
246 | ||
247 | return status; | |
248 | } | |
249 | EXPORT_SYMBOL_GPL(wmi_evaluate_method); | |
250 | ||
56a37025 AL |
251 | static acpi_status __query_block(struct wmi_block *wblock, u8 instance, |
252 | struct acpi_buffer *out) | |
bff431e4 CC |
253 | { |
254 | struct guid_block *block = NULL; | |
54f14c27 | 255 | acpi_handle handle; |
bff431e4 | 256 | acpi_status status, wc_status = AE_ERROR; |
8122ab66 ZR |
257 | struct acpi_object_list input; |
258 | union acpi_object wq_params[1]; | |
f3d83e24 CL |
259 | char method[5]; |
260 | char wc_method[5] = "WC"; | |
bff431e4 | 261 | |
56a37025 | 262 | if (!out) |
bff431e4 CC |
263 | return AE_BAD_PARAMETER; |
264 | ||
bff431e4 | 265 | block = &wblock->gblock; |
b0e86302 | 266 | handle = wblock->acpi_device->handle; |
bff431e4 CC |
267 | |
268 | if (block->instance_count < instance) | |
269 | return AE_BAD_PARAMETER; | |
270 | ||
271 | /* Check GUID is a data block */ | |
272 | if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD)) | |
08237974 | 273 | return AE_ERROR; |
bff431e4 CC |
274 | |
275 | input.count = 1; | |
276 | input.pointer = wq_params; | |
277 | wq_params[0].type = ACPI_TYPE_INTEGER; | |
278 | wq_params[0].integer.value = instance; | |
279 | ||
d4fc91ad AL |
280 | if (instance == 0 && wblock->read_takes_no_args) |
281 | input.count = 0; | |
282 | ||
bff431e4 CC |
283 | /* |
284 | * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method first to | |
285 | * enable collection. | |
286 | */ | |
287 | if (block->flags & ACPI_WMI_EXPENSIVE) { | |
bff431e4 CC |
288 | strncat(wc_method, block->object_id, 2); |
289 | ||
290 | /* | |
291 | * Some GUIDs break the specification by declaring themselves | |
292 | * expensive, but have no corresponding WCxx method. So we | |
293 | * should not fail if this happens. | |
294 | */ | |
54f14c27 | 295 | if (acpi_has_method(handle, wc_method)) |
8122ab66 ZR |
296 | wc_status = acpi_execute_simple_method(handle, |
297 | wc_method, 1); | |
bff431e4 CC |
298 | } |
299 | ||
300 | strcpy(method, "WQ"); | |
301 | strncat(method, block->object_id, 2); | |
302 | ||
dab36ad8 | 303 | status = acpi_evaluate_object(handle, method, &input, out); |
bff431e4 CC |
304 | |
305 | /* | |
306 | * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method, even if | |
307 | * the WQxx method failed - we should disable collection anyway. | |
308 | */ | |
a527f2d7 | 309 | if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) { |
8122ab66 | 310 | status = acpi_execute_simple_method(handle, wc_method, 0); |
bff431e4 CC |
311 | } |
312 | ||
313 | return status; | |
314 | } | |
56a37025 AL |
315 | |
316 | /** | |
317 | * wmi_query_block - Return contents of a WMI block (deprecated) | |
318 | * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba | |
319 | * @instance: Instance index | |
320 | * &out: Empty buffer to return the contents of the data block to | |
321 | * | |
322 | * Return the contents of an ACPI-WMI data block to a buffer | |
323 | */ | |
324 | acpi_status wmi_query_block(const char *guid_string, u8 instance, | |
325 | struct acpi_buffer *out) | |
326 | { | |
327 | struct wmi_block *wblock; | |
328 | ||
329 | if (!guid_string) | |
330 | return AE_BAD_PARAMETER; | |
331 | ||
332 | if (!find_guid(guid_string, &wblock)) | |
333 | return AE_ERROR; | |
334 | ||
335 | return __query_block(wblock, instance, out); | |
336 | } | |
bff431e4 CC |
337 | EXPORT_SYMBOL_GPL(wmi_query_block); |
338 | ||
56a37025 AL |
339 | union acpi_object *wmidev_block_query(struct wmi_device *wdev, u8 instance) |
340 | { | |
341 | struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL }; | |
342 | struct wmi_block *wblock = container_of(wdev, struct wmi_block, dev); | |
343 | ||
344 | if (ACPI_FAILURE(__query_block(wblock, instance, &out))) | |
345 | return NULL; | |
346 | ||
347 | return (union acpi_object *)out.pointer; | |
348 | } | |
349 | EXPORT_SYMBOL_GPL(wmidev_block_query); | |
350 | ||
f6301986 AL |
351 | struct wmi_device *wmidev_get_other_guid(struct wmi_device *wdev, |
352 | const char *guid_string) | |
353 | { | |
354 | struct wmi_block *this_wb = container_of(wdev, struct wmi_block, dev); | |
355 | struct wmi_block *other_wb; | |
356 | ||
357 | if (!find_guid(guid_string, &other_wb)) | |
358 | return NULL; | |
359 | ||
360 | if (other_wb->acpi_device != this_wb->acpi_device) | |
361 | return NULL; | |
362 | ||
363 | get_device(&other_wb->dev.dev); | |
364 | return &other_wb->dev; | |
365 | } | |
366 | EXPORT_SYMBOL_GPL(wmidev_get_other_guid); | |
367 | ||
bff431e4 CC |
368 | /** |
369 | * wmi_set_block - Write to a WMI block | |
370 | * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba | |
371 | * @instance: Instance index | |
372 | * &in: Buffer containing new values for the data block | |
373 | * | |
374 | * Write the contents of the input buffer to an ACPI-WMI data block | |
375 | */ | |
376 | acpi_status wmi_set_block(const char *guid_string, u8 instance, | |
56a37025 | 377 | const struct acpi_buffer *in) |
bff431e4 CC |
378 | { |
379 | struct guid_block *block = NULL; | |
380 | struct wmi_block *wblock = NULL; | |
381 | acpi_handle handle; | |
382 | struct acpi_object_list input; | |
383 | union acpi_object params[2]; | |
f3d83e24 | 384 | char method[5] = "WS"; |
bff431e4 CC |
385 | |
386 | if (!guid_string || !in) | |
387 | return AE_BAD_DATA; | |
388 | ||
389 | if (!find_guid(guid_string, &wblock)) | |
08237974 | 390 | return AE_ERROR; |
bff431e4 CC |
391 | |
392 | block = &wblock->gblock; | |
b0e86302 | 393 | handle = wblock->acpi_device->handle; |
bff431e4 CC |
394 | |
395 | if (block->instance_count < instance) | |
396 | return AE_BAD_PARAMETER; | |
397 | ||
398 | /* Check GUID is a data block */ | |
399 | if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD)) | |
08237974 | 400 | return AE_ERROR; |
bff431e4 CC |
401 | |
402 | input.count = 2; | |
403 | input.pointer = params; | |
404 | params[0].type = ACPI_TYPE_INTEGER; | |
405 | params[0].integer.value = instance; | |
406 | ||
407 | if (block->flags & ACPI_WMI_STRING) { | |
408 | params[1].type = ACPI_TYPE_STRING; | |
409 | } else { | |
410 | params[1].type = ACPI_TYPE_BUFFER; | |
411 | } | |
412 | params[1].buffer.length = in->length; | |
413 | params[1].buffer.pointer = in->pointer; | |
414 | ||
415 | strncat(method, block->object_id, 2); | |
416 | ||
417 | return acpi_evaluate_object(handle, method, &input, NULL); | |
418 | } | |
419 | EXPORT_SYMBOL_GPL(wmi_set_block); | |
420 | ||
37830662 | 421 | static void wmi_dump_wdg(const struct guid_block *g) |
a929aae0 | 422 | { |
85b4e4eb | 423 | pr_info("%pUL:\n", g->guid); |
cd3921f8 PR |
424 | if (g->flags & ACPI_WMI_EVENT) |
425 | pr_info("\tnotify_id: 0x%02X\n", g->notify_id); | |
426 | else | |
427 | pr_info("\tobject_id: %2pE\n", g->object_id); | |
8e07514d | 428 | pr_info("\tinstance_count: %d\n", g->instance_count); |
dd8e908e | 429 | pr_info("\tflags: %#x", g->flags); |
a929aae0 | 430 | if (g->flags) { |
a929aae0 | 431 | if (g->flags & ACPI_WMI_EXPENSIVE) |
dd8e908e | 432 | pr_cont(" ACPI_WMI_EXPENSIVE"); |
a929aae0 | 433 | if (g->flags & ACPI_WMI_METHOD) |
dd8e908e | 434 | pr_cont(" ACPI_WMI_METHOD"); |
a929aae0 | 435 | if (g->flags & ACPI_WMI_STRING) |
dd8e908e | 436 | pr_cont(" ACPI_WMI_STRING"); |
a929aae0 | 437 | if (g->flags & ACPI_WMI_EVENT) |
dd8e908e | 438 | pr_cont(" ACPI_WMI_EVENT"); |
a929aae0 | 439 | } |
8e07514d | 440 | pr_cont("\n"); |
a929aae0 TR |
441 | |
442 | } | |
443 | ||
fc3155b2 TR |
444 | static void wmi_notify_debug(u32 value, void *context) |
445 | { | |
446 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
447 | union acpi_object *obj; | |
1492616a | 448 | acpi_status status; |
fc3155b2 | 449 | |
1492616a AL |
450 | status = wmi_get_event_data(value, &response); |
451 | if (status != AE_OK) { | |
8e07514d | 452 | pr_info("bad event status 0x%x\n", status); |
1492616a AL |
453 | return; |
454 | } | |
fc3155b2 TR |
455 | |
456 | obj = (union acpi_object *)response.pointer; | |
457 | ||
458 | if (!obj) | |
459 | return; | |
460 | ||
8e07514d | 461 | pr_info("DEBUG Event "); |
fc3155b2 TR |
462 | switch(obj->type) { |
463 | case ACPI_TYPE_BUFFER: | |
8e07514d | 464 | pr_cont("BUFFER_TYPE - length %d\n", obj->buffer.length); |
fc3155b2 TR |
465 | break; |
466 | case ACPI_TYPE_STRING: | |
8e07514d | 467 | pr_cont("STRING_TYPE - %s\n", obj->string.pointer); |
fc3155b2 TR |
468 | break; |
469 | case ACPI_TYPE_INTEGER: | |
8e07514d | 470 | pr_cont("INTEGER_TYPE - %llu\n", obj->integer.value); |
fc3155b2 TR |
471 | break; |
472 | case ACPI_TYPE_PACKAGE: | |
8e07514d | 473 | pr_cont("PACKAGE_TYPE - %d elements\n", obj->package.count); |
fc3155b2 TR |
474 | break; |
475 | default: | |
8e07514d | 476 | pr_cont("object type 0x%X\n", obj->type); |
fc3155b2 | 477 | } |
1492616a | 478 | kfree(obj); |
fc3155b2 TR |
479 | } |
480 | ||
bff431e4 CC |
481 | /** |
482 | * wmi_install_notify_handler - Register handler for WMI events | |
483 | * @handler: Function to handle notifications | |
484 | * @data: Data to be returned to handler when event is fired | |
485 | * | |
486 | * Register a handler for events sent to the ACPI-WMI mapper device. | |
487 | */ | |
488 | acpi_status wmi_install_notify_handler(const char *guid, | |
489 | wmi_notify_handler handler, void *data) | |
490 | { | |
491 | struct wmi_block *block; | |
58f6425e | 492 | acpi_status status = AE_NOT_EXIST; |
538d7eb8 | 493 | uuid_le guid_input; |
58f6425e | 494 | struct list_head *p; |
bff431e4 CC |
495 | |
496 | if (!guid || !handler) | |
497 | return AE_BAD_PARAMETER; | |
498 | ||
538d7eb8 AS |
499 | if (uuid_le_to_bin(guid, &guid_input)) |
500 | return AE_BAD_PARAMETER; | |
bff431e4 | 501 | |
58f6425e CK |
502 | list_for_each(p, &wmi_block_list) { |
503 | acpi_status wmi_status; | |
504 | block = list_entry(p, struct wmi_block, list); | |
505 | ||
538d7eb8 | 506 | if (memcmp(block->gblock.guid, &guid_input, 16) == 0) { |
58f6425e CK |
507 | if (block->handler && |
508 | block->handler != wmi_notify_debug) | |
509 | return AE_ALREADY_ACQUIRED; | |
bff431e4 | 510 | |
58f6425e CK |
511 | block->handler = handler; |
512 | block->handler_data = data; | |
bff431e4 | 513 | |
58f6425e CK |
514 | wmi_status = wmi_method_enable(block, 1); |
515 | if ((wmi_status != AE_OK) || | |
516 | ((wmi_status == AE_OK) && (status == AE_NOT_EXIST))) | |
517 | status = wmi_status; | |
518 | } | |
519 | } | |
a66bfa7a MG |
520 | |
521 | return status; | |
bff431e4 CC |
522 | } |
523 | EXPORT_SYMBOL_GPL(wmi_install_notify_handler); | |
524 | ||
525 | /** | |
526 | * wmi_uninstall_notify_handler - Unregister handler for WMI events | |
527 | * | |
528 | * Unregister handler for events sent to the ACPI-WMI mapper device. | |
529 | */ | |
530 | acpi_status wmi_remove_notify_handler(const char *guid) | |
531 | { | |
532 | struct wmi_block *block; | |
58f6425e | 533 | acpi_status status = AE_NOT_EXIST; |
538d7eb8 | 534 | uuid_le guid_input; |
58f6425e | 535 | struct list_head *p; |
bff431e4 CC |
536 | |
537 | if (!guid) | |
538 | return AE_BAD_PARAMETER; | |
539 | ||
538d7eb8 AS |
540 | if (uuid_le_to_bin(guid, &guid_input)) |
541 | return AE_BAD_PARAMETER; | |
bff431e4 | 542 | |
58f6425e CK |
543 | list_for_each(p, &wmi_block_list) { |
544 | acpi_status wmi_status; | |
545 | block = list_entry(p, struct wmi_block, list); | |
546 | ||
538d7eb8 | 547 | if (memcmp(block->gblock.guid, &guid_input, 16) == 0) { |
58f6425e CK |
548 | if (!block->handler || |
549 | block->handler == wmi_notify_debug) | |
550 | return AE_NULL_ENTRY; | |
551 | ||
552 | if (debug_event) { | |
553 | block->handler = wmi_notify_debug; | |
554 | status = AE_OK; | |
555 | } else { | |
556 | wmi_status = wmi_method_enable(block, 0); | |
557 | block->handler = NULL; | |
558 | block->handler_data = NULL; | |
559 | if ((wmi_status != AE_OK) || | |
560 | ((wmi_status == AE_OK) && | |
561 | (status == AE_NOT_EXIST))) | |
562 | status = wmi_status; | |
563 | } | |
564 | } | |
fc3155b2 | 565 | } |
58f6425e | 566 | |
a66bfa7a | 567 | return status; |
bff431e4 CC |
568 | } |
569 | EXPORT_SYMBOL_GPL(wmi_remove_notify_handler); | |
570 | ||
571 | /** | |
572 | * wmi_get_event_data - Get WMI data associated with an event | |
573 | * | |
3e9b988e AA |
574 | * @event: Event to find |
575 | * @out: Buffer to hold event data. out->pointer should be freed with kfree() | |
bff431e4 CC |
576 | * |
577 | * Returns extra data associated with an event in WMI. | |
578 | */ | |
579 | acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out) | |
580 | { | |
581 | struct acpi_object_list input; | |
582 | union acpi_object params[1]; | |
583 | struct guid_block *gblock; | |
584 | struct wmi_block *wblock; | |
585 | struct list_head *p; | |
586 | ||
587 | input.count = 1; | |
588 | input.pointer = params; | |
589 | params[0].type = ACPI_TYPE_INTEGER; | |
590 | params[0].integer.value = event; | |
591 | ||
762e1a2f | 592 | list_for_each(p, &wmi_block_list) { |
bff431e4 CC |
593 | wblock = list_entry(p, struct wmi_block, list); |
594 | gblock = &wblock->gblock; | |
595 | ||
596 | if ((gblock->flags & ACPI_WMI_EVENT) && | |
597 | (gblock->notify_id == event)) | |
b0e86302 AL |
598 | return acpi_evaluate_object(wblock->acpi_device->handle, |
599 | "_WED", &input, out); | |
bff431e4 CC |
600 | } |
601 | ||
602 | return AE_NOT_FOUND; | |
603 | } | |
604 | EXPORT_SYMBOL_GPL(wmi_get_event_data); | |
605 | ||
606 | /** | |
607 | * wmi_has_guid - Check if a GUID is available | |
608 | * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba | |
609 | * | |
610 | * Check if a given GUID is defined by _WDG | |
611 | */ | |
612 | bool wmi_has_guid(const char *guid_string) | |
613 | { | |
614 | return find_guid(guid_string, NULL); | |
615 | } | |
616 | EXPORT_SYMBOL_GPL(wmi_has_guid); | |
617 | ||
844af950 AL |
618 | static struct wmi_block *dev_to_wblock(struct device *dev) |
619 | { | |
620 | return container_of(dev, struct wmi_block, dev.dev); | |
621 | } | |
622 | ||
623 | static struct wmi_device *dev_to_wdev(struct device *dev) | |
624 | { | |
625 | return container_of(dev, struct wmi_device, dev); | |
626 | } | |
627 | ||
1caab3c1 MG |
628 | /* |
629 | * sysfs interface | |
630 | */ | |
614ef432 | 631 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |
1caab3c1 MG |
632 | char *buf) |
633 | { | |
844af950 | 634 | struct wmi_block *wblock = dev_to_wblock(dev); |
1caab3c1 | 635 | |
85b4e4eb | 636 | return sprintf(buf, "wmi:%pUL\n", wblock->gblock.guid); |
1caab3c1 | 637 | } |
e80b89a5 | 638 | static DEVICE_ATTR_RO(modalias); |
614ef432 | 639 | |
844af950 AL |
640 | static ssize_t guid_show(struct device *dev, struct device_attribute *attr, |
641 | char *buf) | |
642 | { | |
643 | struct wmi_block *wblock = dev_to_wblock(dev); | |
644 | ||
645 | return sprintf(buf, "%pUL\n", wblock->gblock.guid); | |
646 | } | |
647 | static DEVICE_ATTR_RO(guid); | |
648 | ||
d79b1074 AL |
649 | static ssize_t instance_count_show(struct device *dev, |
650 | struct device_attribute *attr, char *buf) | |
651 | { | |
652 | struct wmi_block *wblock = dev_to_wblock(dev); | |
653 | ||
654 | return sprintf(buf, "%d\n", (int)wblock->gblock.instance_count); | |
655 | } | |
656 | static DEVICE_ATTR_RO(instance_count); | |
657 | ||
658 | static ssize_t expensive_show(struct device *dev, | |
659 | struct device_attribute *attr, char *buf) | |
660 | { | |
661 | struct wmi_block *wblock = dev_to_wblock(dev); | |
662 | ||
663 | return sprintf(buf, "%d\n", | |
664 | (wblock->gblock.flags & ACPI_WMI_EXPENSIVE) != 0); | |
665 | } | |
666 | static DEVICE_ATTR_RO(expensive); | |
667 | ||
e80b89a5 GKH |
668 | static struct attribute *wmi_attrs[] = { |
669 | &dev_attr_modalias.attr, | |
844af950 | 670 | &dev_attr_guid.attr, |
d79b1074 AL |
671 | &dev_attr_instance_count.attr, |
672 | &dev_attr_expensive.attr, | |
e80b89a5 | 673 | NULL, |
614ef432 | 674 | }; |
e80b89a5 | 675 | ATTRIBUTE_GROUPS(wmi); |
1caab3c1 | 676 | |
d79b1074 AL |
677 | static ssize_t notify_id_show(struct device *dev, struct device_attribute *attr, |
678 | char *buf) | |
679 | { | |
680 | struct wmi_block *wblock = dev_to_wblock(dev); | |
681 | ||
682 | return sprintf(buf, "%02X\n", (unsigned int)wblock->gblock.notify_id); | |
683 | } | |
684 | static DEVICE_ATTR_RO(notify_id); | |
685 | ||
686 | static struct attribute *wmi_event_attrs[] = { | |
687 | &dev_attr_notify_id.attr, | |
688 | NULL, | |
689 | }; | |
690 | ATTRIBUTE_GROUPS(wmi_event); | |
691 | ||
692 | static ssize_t object_id_show(struct device *dev, struct device_attribute *attr, | |
693 | char *buf) | |
694 | { | |
695 | struct wmi_block *wblock = dev_to_wblock(dev); | |
696 | ||
697 | return sprintf(buf, "%c%c\n", wblock->gblock.object_id[0], | |
698 | wblock->gblock.object_id[1]); | |
699 | } | |
700 | static DEVICE_ATTR_RO(object_id); | |
701 | ||
fd70da6a DHV |
702 | static ssize_t setable_show(struct device *dev, struct device_attribute *attr, |
703 | char *buf) | |
d4fc91ad AL |
704 | { |
705 | struct wmi_device *wdev = dev_to_wdev(dev); | |
706 | ||
fd70da6a | 707 | return sprintf(buf, "%d\n", (int)wdev->setable); |
d4fc91ad | 708 | } |
fd70da6a | 709 | static DEVICE_ATTR_RO(setable); |
d4fc91ad AL |
710 | |
711 | static struct attribute *wmi_data_attrs[] = { | |
712 | &dev_attr_object_id.attr, | |
fd70da6a | 713 | &dev_attr_setable.attr, |
d4fc91ad AL |
714 | NULL, |
715 | }; | |
716 | ATTRIBUTE_GROUPS(wmi_data); | |
717 | ||
718 | static struct attribute *wmi_method_attrs[] = { | |
d79b1074 AL |
719 | &dev_attr_object_id.attr, |
720 | NULL, | |
721 | }; | |
d4fc91ad | 722 | ATTRIBUTE_GROUPS(wmi_method); |
d79b1074 | 723 | |
1caab3c1 MG |
724 | static int wmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env) |
725 | { | |
844af950 | 726 | struct wmi_block *wblock = dev_to_wblock(dev); |
1caab3c1 | 727 | |
844af950 | 728 | if (add_uevent_var(env, "MODALIAS=wmi:%pUL", wblock->gblock.guid)) |
1caab3c1 MG |
729 | return -ENOMEM; |
730 | ||
844af950 | 731 | if (add_uevent_var(env, "WMI_GUID=%pUL", wblock->gblock.guid)) |
1caab3c1 MG |
732 | return -ENOMEM; |
733 | ||
844af950 AL |
734 | return 0; |
735 | } | |
736 | ||
737 | static void wmi_dev_release(struct device *dev) | |
738 | { | |
739 | struct wmi_block *wblock = dev_to_wblock(dev); | |
740 | ||
741 | kfree(wblock); | |
742 | } | |
743 | ||
744 | static int wmi_dev_match(struct device *dev, struct device_driver *driver) | |
745 | { | |
746 | struct wmi_driver *wmi_driver = | |
747 | container_of(driver, struct wmi_driver, driver); | |
748 | struct wmi_block *wblock = dev_to_wblock(dev); | |
749 | const struct wmi_device_id *id = wmi_driver->id_table; | |
1caab3c1 | 750 | |
844af950 AL |
751 | while (id->guid_string) { |
752 | uuid_le driver_guid; | |
753 | ||
754 | if (WARN_ON(uuid_le_to_bin(id->guid_string, &driver_guid))) | |
755 | continue; | |
756 | if (!memcmp(&driver_guid, wblock->gblock.guid, 16)) | |
757 | return 1; | |
758 | ||
759 | id++; | |
760 | } | |
1caab3c1 MG |
761 | |
762 | return 0; | |
763 | } | |
764 | ||
844af950 | 765 | static int wmi_dev_probe(struct device *dev) |
1caab3c1 | 766 | { |
844af950 AL |
767 | struct wmi_block *wblock = dev_to_wblock(dev); |
768 | struct wmi_driver *wdriver = | |
769 | container_of(dev->driver, struct wmi_driver, driver); | |
770 | int ret = 0; | |
771 | ||
772 | if (ACPI_FAILURE(wmi_method_enable(wblock, 1))) | |
773 | dev_warn(dev, "failed to enable device -- probing anyway\n"); | |
774 | ||
775 | if (wdriver->probe) { | |
776 | ret = wdriver->probe(dev_to_wdev(dev)); | |
777 | if (ret != 0 && ACPI_FAILURE(wmi_method_enable(wblock, 0))) | |
778 | dev_warn(dev, "failed to disable device\n"); | |
779 | } | |
780 | ||
781 | return ret; | |
782 | } | |
783 | ||
784 | static int wmi_dev_remove(struct device *dev) | |
785 | { | |
786 | struct wmi_block *wblock = dev_to_wblock(dev); | |
787 | struct wmi_driver *wdriver = | |
788 | container_of(dev->driver, struct wmi_driver, driver); | |
789 | int ret = 0; | |
790 | ||
791 | if (wdriver->remove) | |
792 | ret = wdriver->remove(dev_to_wdev(dev)); | |
793 | ||
794 | if (ACPI_FAILURE(wmi_method_enable(wblock, 0))) | |
795 | dev_warn(dev, "failed to disable device\n"); | |
c64eefd4 | 796 | |
844af950 | 797 | return ret; |
1caab3c1 MG |
798 | } |
799 | ||
844af950 AL |
800 | static struct class wmi_bus_class = { |
801 | .name = "wmi_bus", | |
802 | }; | |
803 | ||
804 | static struct bus_type wmi_bus_type = { | |
1caab3c1 | 805 | .name = "wmi", |
e80b89a5 | 806 | .dev_groups = wmi_groups, |
844af950 AL |
807 | .match = wmi_dev_match, |
808 | .uevent = wmi_dev_uevent, | |
809 | .probe = wmi_dev_probe, | |
810 | .remove = wmi_dev_remove, | |
1caab3c1 MG |
811 | }; |
812 | ||
d79b1074 AL |
813 | static struct device_type wmi_type_event = { |
814 | .name = "event", | |
815 | .groups = wmi_event_groups, | |
816 | .release = wmi_dev_release, | |
817 | }; | |
818 | ||
819 | static struct device_type wmi_type_method = { | |
820 | .name = "method", | |
d4fc91ad | 821 | .groups = wmi_method_groups, |
d79b1074 AL |
822 | .release = wmi_dev_release, |
823 | }; | |
824 | ||
825 | static struct device_type wmi_type_data = { | |
826 | .name = "data", | |
d4fc91ad | 827 | .groups = wmi_data_groups, |
d79b1074 AL |
828 | .release = wmi_dev_release, |
829 | }; | |
830 | ||
fd70da6a | 831 | static int wmi_create_device(struct device *wmi_bus_dev, |
844af950 | 832 | const struct guid_block *gblock, |
7f5809bf AL |
833 | struct wmi_block *wblock, |
834 | struct acpi_device *device) | |
1caab3c1 | 835 | { |
fd70da6a DHV |
836 | struct acpi_device_info *info; |
837 | char method[5]; | |
838 | int result; | |
1caab3c1 | 839 | |
d79b1074 AL |
840 | if (gblock->flags & ACPI_WMI_EVENT) { |
841 | wblock->dev.dev.type = &wmi_type_event; | |
fd70da6a DHV |
842 | goto out_init; |
843 | } | |
844 | ||
845 | if (gblock->flags & ACPI_WMI_METHOD) { | |
d79b1074 | 846 | wblock->dev.dev.type = &wmi_type_method; |
fd70da6a DHV |
847 | goto out_init; |
848 | } | |
d4fc91ad | 849 | |
fd70da6a DHV |
850 | /* |
851 | * Data Block Query Control Method (WQxx by convention) is | |
852 | * required per the WMI documentation. If it is not present, | |
853 | * we ignore this data block. | |
854 | */ | |
855 | strcpy(method, "WQ"); | |
856 | strncat(method, wblock->gblock.object_id, 2); | |
857 | result = get_subobj_info(device->handle, method, &info); | |
858 | ||
859 | if (result) { | |
860 | dev_warn(wmi_bus_dev, | |
861 | "%s data block query control method not found", | |
862 | method); | |
863 | return result; | |
864 | } | |
d4fc91ad | 865 | |
fd70da6a | 866 | wblock->dev.dev.type = &wmi_type_data; |
d4fc91ad | 867 | |
fd70da6a DHV |
868 | /* |
869 | * The Microsoft documentation specifically states: | |
870 | * | |
871 | * Data blocks registered with only a single instance | |
872 | * can ignore the parameter. | |
873 | * | |
874 | * ACPICA will get mad at us if we call the method with the wrong number | |
875 | * of arguments, so check what our method expects. (On some Dell | |
876 | * laptops, WQxx may not be a method at all.) | |
877 | */ | |
878 | if (info->type != ACPI_TYPE_METHOD || info->param_count == 0) | |
879 | wblock->read_takes_no_args = true; | |
d4fc91ad | 880 | |
fd70da6a | 881 | kfree(info); |
d4fc91ad | 882 | |
fd70da6a DHV |
883 | strcpy(method, "WS"); |
884 | strncat(method, wblock->gblock.object_id, 2); | |
885 | result = get_subobj_info(device->handle, method, NULL); | |
d4fc91ad | 886 | |
fd70da6a DHV |
887 | if (result == 0) |
888 | wblock->dev.setable = true; | |
d4fc91ad | 889 | |
fd70da6a DHV |
890 | out_init: |
891 | wblock->dev.dev.bus = &wmi_bus_type; | |
892 | wblock->dev.dev.parent = wmi_bus_dev; | |
d4fc91ad | 893 | |
fd70da6a | 894 | dev_set_name(&wblock->dev.dev, "%pUL", gblock->guid); |
1caab3c1 | 895 | |
6ee50aaa | 896 | device_initialize(&wblock->dev.dev); |
fd70da6a DHV |
897 | |
898 | return 0; | |
1caab3c1 MG |
899 | } |
900 | ||
b0e86302 | 901 | static void wmi_free_devices(struct acpi_device *device) |
1caab3c1 | 902 | { |
c64eefd4 | 903 | struct wmi_block *wblock, *next; |
1caab3c1 MG |
904 | |
905 | /* Delete devices for all the GUIDs */ | |
023b9565 | 906 | list_for_each_entry_safe(wblock, next, &wmi_block_list, list) { |
b0e86302 AL |
907 | if (wblock->acpi_device == device) { |
908 | list_del(&wblock->list); | |
6ee50aaa | 909 | device_unregister(&wblock->dev.dev); |
b0e86302 | 910 | } |
023b9565 | 911 | } |
1caab3c1 MG |
912 | } |
913 | ||
b0e86302 AL |
914 | static bool guid_already_parsed(struct acpi_device *device, |
915 | const u8 *guid) | |
d1f9e497 | 916 | { |
d1f9e497 | 917 | struct wmi_block *wblock; |
d1f9e497 | 918 | |
b0e86302 AL |
919 | list_for_each_entry(wblock, &wmi_block_list, list) { |
920 | if (memcmp(wblock->gblock.guid, guid, 16) == 0) { | |
921 | /* | |
922 | * Because we historically didn't track the relationship | |
923 | * between GUIDs and ACPI nodes, we don't know whether | |
924 | * we need to suppress GUIDs that are unique on a | |
925 | * given node but duplicated across nodes. | |
926 | */ | |
927 | dev_warn(&device->dev, "duplicate WMI GUID %pUL (first instance was on %s)\n", | |
928 | guid, dev_name(&wblock->acpi_device->dev)); | |
d1f9e497 | 929 | return true; |
b0e86302 AL |
930 | } |
931 | } | |
d1f9e497 | 932 | |
c64eefd4 | 933 | return false; |
2d5ab555 DT |
934 | } |
935 | ||
bff431e4 CC |
936 | /* |
937 | * Parse the _WDG method for the GUID data blocks | |
938 | */ | |
844af950 | 939 | static int parse_wdg(struct device *wmi_bus_dev, struct acpi_device *device) |
bff431e4 CC |
940 | { |
941 | struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL}; | |
37830662 | 942 | const struct guid_block *gblock; |
6ee50aaa DHV |
943 | struct wmi_block *wblock, *next; |
944 | union acpi_object *obj; | |
bff431e4 | 945 | acpi_status status; |
6ee50aaa | 946 | int retval = 0; |
bff431e4 CC |
947 | u32 i, total; |
948 | ||
7f5809bf | 949 | status = acpi_evaluate_object(device->handle, "_WDG", NULL, &out); |
bff431e4 | 950 | if (ACPI_FAILURE(status)) |
c64eefd4 | 951 | return -ENXIO; |
bff431e4 CC |
952 | |
953 | obj = (union acpi_object *) out.pointer; | |
3d2c63eb | 954 | if (!obj) |
c64eefd4 | 955 | return -ENXIO; |
bff431e4 | 956 | |
64ed0ab8 | 957 | if (obj->type != ACPI_TYPE_BUFFER) { |
c64eefd4 | 958 | retval = -ENXIO; |
64ed0ab8 DT |
959 | goto out_free_pointer; |
960 | } | |
bff431e4 | 961 | |
37830662 | 962 | gblock = (const struct guid_block *)obj->buffer.pointer; |
bff431e4 CC |
963 | total = obj->buffer.length / sizeof(struct guid_block); |
964 | ||
bff431e4 | 965 | for (i = 0; i < total; i++) { |
58f6425e CK |
966 | if (debug_dump_wdg) |
967 | wmi_dump_wdg(&gblock[i]); | |
968 | ||
a1c31bcd AL |
969 | /* |
970 | * Some WMI devices, like those for nVidia hooks, have a | |
971 | * duplicate GUID. It's not clear what we should do in this | |
972 | * case yet, so for now, we'll just ignore the duplicate | |
973 | * for device creation. | |
974 | */ | |
975 | if (guid_already_parsed(device, gblock[i].guid)) | |
976 | continue; | |
977 | ||
58f6425e | 978 | wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL); |
6ee50aaa DHV |
979 | if (!wblock) { |
980 | retval = -ENOMEM; | |
981 | break; | |
982 | } | |
58f6425e | 983 | |
b0e86302 | 984 | wblock->acpi_device = device; |
58f6425e CK |
985 | wblock->gblock = gblock[i]; |
986 | ||
fd70da6a DHV |
987 | retval = wmi_create_device(wmi_bus_dev, &gblock[i], wblock, device); |
988 | if (retval) { | |
989 | kfree(wblock); | |
990 | continue; | |
991 | } | |
c64eefd4 | 992 | |
58f6425e | 993 | list_add_tail(&wblock->list, &wmi_block_list); |
bff431e4 | 994 | |
fc3155b2 TR |
995 | if (debug_event) { |
996 | wblock->handler = wmi_notify_debug; | |
2d5ab555 | 997 | wmi_method_enable(wblock, 1); |
fc3155b2 | 998 | } |
bff431e4 CC |
999 | } |
1000 | ||
6ee50aaa DHV |
1001 | /* |
1002 | * Now that all of the devices are created, add them to the | |
1003 | * device tree and probe subdrivers. | |
1004 | */ | |
1005 | list_for_each_entry_safe(wblock, next, &wmi_block_list, list) { | |
1006 | if (wblock->acpi_device != device) | |
1007 | continue; | |
1008 | ||
1009 | retval = device_add(&wblock->dev.dev); | |
1010 | if (retval) { | |
1011 | dev_err(wmi_bus_dev, "failed to register %pULL\n", | |
1012 | wblock->gblock.guid); | |
1013 | if (debug_event) | |
1014 | wmi_method_enable(wblock, 0); | |
1015 | list_del(&wblock->list); | |
1016 | put_device(&wblock->dev.dev); | |
1017 | } | |
1018 | } | |
c64eefd4 | 1019 | |
a5167c5b AL |
1020 | out_free_pointer: |
1021 | kfree(out.pointer); | |
c64eefd4 | 1022 | return retval; |
bff431e4 CC |
1023 | } |
1024 | ||
1025 | /* | |
1026 | * WMI can have EmbeddedControl access regions. In which case, we just want to | |
1027 | * hand these off to the EC driver. | |
1028 | */ | |
1029 | static acpi_status | |
1030 | acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address, | |
439913ff | 1031 | u32 bits, u64 *value, |
bff431e4 CC |
1032 | void *handler_context, void *region_context) |
1033 | { | |
1034 | int result = 0, i = 0; | |
1035 | u8 temp = 0; | |
1036 | ||
1037 | if ((address > 0xFF) || !value) | |
1038 | return AE_BAD_PARAMETER; | |
1039 | ||
1040 | if (function != ACPI_READ && function != ACPI_WRITE) | |
1041 | return AE_BAD_PARAMETER; | |
1042 | ||
1043 | if (bits != 8) | |
1044 | return AE_BAD_PARAMETER; | |
1045 | ||
1046 | if (function == ACPI_READ) { | |
1047 | result = ec_read(address, &temp); | |
439913ff | 1048 | (*value) |= ((u64)temp) << i; |
bff431e4 CC |
1049 | } else { |
1050 | temp = 0xff & ((*value) >> i); | |
1051 | result = ec_write(address, temp); | |
1052 | } | |
1053 | ||
1054 | switch (result) { | |
1055 | case -EINVAL: | |
1056 | return AE_BAD_PARAMETER; | |
1057 | break; | |
1058 | case -ENODEV: | |
1059 | return AE_NOT_FOUND; | |
1060 | break; | |
1061 | case -ETIME: | |
1062 | return AE_TIME; | |
1063 | break; | |
1064 | default: | |
1065 | return AE_OK; | |
1066 | } | |
1067 | } | |
1068 | ||
1686f544 AL |
1069 | static void acpi_wmi_notify_handler(acpi_handle handle, u32 event, |
1070 | void *context) | |
bff431e4 CC |
1071 | { |
1072 | struct guid_block *block; | |
1073 | struct wmi_block *wblock; | |
1074 | struct list_head *p; | |
1686f544 | 1075 | bool found_it = false; |
bff431e4 | 1076 | |
762e1a2f | 1077 | list_for_each(p, &wmi_block_list) { |
bff431e4 CC |
1078 | wblock = list_entry(p, struct wmi_block, list); |
1079 | block = &wblock->gblock; | |
1080 | ||
1686f544 | 1081 | if (wblock->acpi_device->handle == handle && |
b0e86302 | 1082 | (block->flags & ACPI_WMI_EVENT) && |
1686f544 AL |
1083 | (block->notify_id == event)) |
1084 | { | |
1085 | found_it = true; | |
bff431e4 CC |
1086 | break; |
1087 | } | |
1088 | } | |
1686f544 AL |
1089 | |
1090 | if (!found_it) | |
1091 | return; | |
1092 | ||
1093 | /* If a driver is bound, then notify the driver. */ | |
1094 | if (wblock->dev.dev.driver) { | |
1095 | struct wmi_driver *driver; | |
1096 | struct acpi_object_list input; | |
1097 | union acpi_object params[1]; | |
1098 | struct acpi_buffer evdata = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1099 | acpi_status status; | |
1100 | ||
1101 | driver = container_of(wblock->dev.dev.driver, | |
1102 | struct wmi_driver, driver); | |
1103 | ||
1104 | input.count = 1; | |
1105 | input.pointer = params; | |
1106 | params[0].type = ACPI_TYPE_INTEGER; | |
1107 | params[0].integer.value = event; | |
1108 | ||
1109 | status = acpi_evaluate_object(wblock->acpi_device->handle, | |
1110 | "_WED", &input, &evdata); | |
1111 | if (ACPI_FAILURE(status)) { | |
1112 | dev_warn(&wblock->dev.dev, | |
1113 | "failed to get event data\n"); | |
1114 | return; | |
1115 | } | |
1116 | ||
1117 | if (driver->notify) | |
1118 | driver->notify(&wblock->dev, | |
1119 | (union acpi_object *)evdata.pointer); | |
1120 | ||
1121 | kfree(evdata.pointer); | |
1122 | } else if (wblock->handler) { | |
1123 | /* Legacy handler */ | |
1124 | wblock->handler(event, wblock->handler_data); | |
1125 | } | |
1126 | ||
1127 | if (debug_event) { | |
1128 | pr_info("DEBUG Event GUID: %pUL\n", | |
1129 | wblock->gblock.guid); | |
1130 | } | |
1131 | ||
1132 | acpi_bus_generate_netlink_event( | |
1133 | wblock->acpi_device->pnp.device_class, | |
1134 | dev_name(&wblock->dev.dev), | |
1135 | event, 0); | |
1136 | ||
bff431e4 CC |
1137 | } |
1138 | ||
9599ed91 | 1139 | static int acpi_wmi_remove(struct platform_device *device) |
bff431e4 | 1140 | { |
9599ed91 AL |
1141 | struct acpi_device *acpi_device = ACPI_COMPANION(&device->dev); |
1142 | ||
1143 | acpi_remove_notify_handler(acpi_device->handle, ACPI_DEVICE_NOTIFY, | |
1686f544 | 1144 | acpi_wmi_notify_handler); |
9599ed91 | 1145 | acpi_remove_address_space_handler(acpi_device->handle, |
bff431e4 | 1146 | ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler); |
9599ed91 AL |
1147 | wmi_free_devices(acpi_device); |
1148 | device_unregister((struct device *)dev_get_drvdata(&device->dev)); | |
bff431e4 CC |
1149 | |
1150 | return 0; | |
1151 | } | |
1152 | ||
9599ed91 | 1153 | static int acpi_wmi_probe(struct platform_device *device) |
bff431e4 | 1154 | { |
9599ed91 | 1155 | struct acpi_device *acpi_device; |
844af950 | 1156 | struct device *wmi_bus_dev; |
bff431e4 | 1157 | acpi_status status; |
c64eefd4 | 1158 | int error; |
bff431e4 | 1159 | |
9599ed91 AL |
1160 | acpi_device = ACPI_COMPANION(&device->dev); |
1161 | if (!acpi_device) { | |
1162 | dev_err(&device->dev, "ACPI companion is missing\n"); | |
1163 | return -ENODEV; | |
1164 | } | |
1165 | ||
1166 | status = acpi_install_address_space_handler(acpi_device->handle, | |
bff431e4 CC |
1167 | ACPI_ADR_SPACE_EC, |
1168 | &acpi_wmi_ec_space_handler, | |
1169 | NULL, NULL); | |
5212cd67 | 1170 | if (ACPI_FAILURE(status)) { |
46492ee4 | 1171 | dev_err(&device->dev, "Error installing EC region handler\n"); |
bff431e4 | 1172 | return -ENODEV; |
5212cd67 | 1173 | } |
bff431e4 | 1174 | |
9599ed91 AL |
1175 | status = acpi_install_notify_handler(acpi_device->handle, |
1176 | ACPI_DEVICE_NOTIFY, | |
1686f544 AL |
1177 | acpi_wmi_notify_handler, |
1178 | NULL); | |
1179 | if (ACPI_FAILURE(status)) { | |
1180 | dev_err(&device->dev, "Error installing notify handler\n"); | |
1181 | error = -ENODEV; | |
1182 | goto err_remove_ec_handler; | |
1183 | } | |
1184 | ||
844af950 AL |
1185 | wmi_bus_dev = device_create(&wmi_bus_class, &device->dev, MKDEV(0, 0), |
1186 | NULL, "wmi_bus-%s", dev_name(&device->dev)); | |
1187 | if (IS_ERR(wmi_bus_dev)) { | |
1188 | error = PTR_ERR(wmi_bus_dev); | |
1686f544 | 1189 | goto err_remove_notify_handler; |
844af950 | 1190 | } |
9599ed91 | 1191 | dev_set_drvdata(&device->dev, wmi_bus_dev); |
844af950 | 1192 | |
9599ed91 | 1193 | error = parse_wdg(wmi_bus_dev, acpi_device); |
c64eefd4 | 1194 | if (error) { |
8e07514d | 1195 | pr_err("Failed to parse WDG method\n"); |
844af950 | 1196 | goto err_remove_busdev; |
bff431e4 CC |
1197 | } |
1198 | ||
c64eefd4 | 1199 | return 0; |
46492ee4 | 1200 | |
844af950 AL |
1201 | err_remove_busdev: |
1202 | device_unregister(wmi_bus_dev); | |
1203 | ||
1686f544 | 1204 | err_remove_notify_handler: |
9599ed91 | 1205 | acpi_remove_notify_handler(acpi_device->handle, ACPI_DEVICE_NOTIFY, |
1686f544 AL |
1206 | acpi_wmi_notify_handler); |
1207 | ||
1208 | err_remove_ec_handler: | |
9599ed91 | 1209 | acpi_remove_address_space_handler(acpi_device->handle, |
46492ee4 AL |
1210 | ACPI_ADR_SPACE_EC, |
1211 | &acpi_wmi_ec_space_handler); | |
1212 | ||
1213 | return error; | |
bff431e4 CC |
1214 | } |
1215 | ||
844af950 AL |
1216 | int __must_check __wmi_driver_register(struct wmi_driver *driver, |
1217 | struct module *owner) | |
1218 | { | |
1219 | driver->driver.owner = owner; | |
1220 | driver->driver.bus = &wmi_bus_type; | |
1221 | ||
1222 | return driver_register(&driver->driver); | |
1223 | } | |
1224 | EXPORT_SYMBOL(__wmi_driver_register); | |
1225 | ||
1226 | void wmi_driver_unregister(struct wmi_driver *driver) | |
1227 | { | |
1228 | driver_unregister(&driver->driver); | |
1229 | } | |
1230 | EXPORT_SYMBOL(wmi_driver_unregister); | |
1231 | ||
bff431e4 CC |
1232 | static int __init acpi_wmi_init(void) |
1233 | { | |
c64eefd4 | 1234 | int error; |
bff431e4 CC |
1235 | |
1236 | if (acpi_disabled) | |
1237 | return -ENODEV; | |
1238 | ||
844af950 | 1239 | error = class_register(&wmi_bus_class); |
c64eefd4 DT |
1240 | if (error) |
1241 | return error; | |
1caab3c1 | 1242 | |
844af950 AL |
1243 | error = bus_register(&wmi_bus_type); |
1244 | if (error) | |
1245 | goto err_unreg_class; | |
1246 | ||
9599ed91 | 1247 | error = platform_driver_register(&acpi_wmi_driver); |
c64eefd4 DT |
1248 | if (error) { |
1249 | pr_err("Error loading mapper\n"); | |
844af950 | 1250 | goto err_unreg_bus; |
bff431e4 CC |
1251 | } |
1252 | ||
8e07514d | 1253 | return 0; |
844af950 | 1254 | |
844af950 AL |
1255 | err_unreg_bus: |
1256 | bus_unregister(&wmi_bus_type); | |
1257 | ||
97277717 AK |
1258 | err_unreg_class: |
1259 | class_unregister(&wmi_bus_class); | |
1260 | ||
844af950 | 1261 | return error; |
bff431e4 CC |
1262 | } |
1263 | ||
1264 | static void __exit acpi_wmi_exit(void) | |
1265 | { | |
9599ed91 | 1266 | platform_driver_unregister(&acpi_wmi_driver); |
844af950 AL |
1267 | class_unregister(&wmi_bus_class); |
1268 | bus_unregister(&wmi_bus_type); | |
bff431e4 CC |
1269 | } |
1270 | ||
1271 | subsys_initcall(acpi_wmi_init); | |
1272 | module_exit(acpi_wmi_exit); |