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1da177e4 LT |
1 | /* |
2 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/ioport.h> | |
d568df84 | 28 | #include <linux/kernel.h> |
1da177e4 LT |
29 | #include <linux/list.h> |
30 | #include <linux/sched.h> | |
31 | #include <linux/pm.h> | |
32 | #include <linux/device.h> | |
33 | #include <linux/proc_fs.h> | |
6697c052 | 34 | #include <linux/acpi.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1ea15c44 | 36 | #include <linux/regulator/machine.h> |
1da177e4 LT |
37 | #ifdef CONFIG_X86 |
38 | #include <asm/mpspec.h> | |
39 | #endif | |
7752d5cf | 40 | #include <linux/pci.h> |
1da177e4 LT |
41 | #include <acpi/acpi_bus.h> |
42 | #include <acpi/acpi_drivers.h> | |
eccddd32 | 43 | #include <acpi/apei.h> |
eb27cae8 | 44 | #include <linux/dmi.h> |
cd51e61c | 45 | #include <linux/suspend.h> |
1da177e4 | 46 | |
e60cc7a6 BH |
47 | #include "internal.h" |
48 | ||
1da177e4 | 49 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 50 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 51 | |
4be44fcd LB |
52 | struct acpi_device *acpi_root; |
53 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
54 | EXPORT_SYMBOL(acpi_root_dir); |
55 | ||
56 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
57 | ||
6415e12b | 58 | |
cce4f632 | 59 | #ifdef CONFIG_X86 |
8df7e870 LZ |
60 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
61 | static inline int set_copy_dsdt(const struct dmi_system_id *id) | |
62 | { | |
63 | return 0; | |
64 | } | |
65 | #else | |
aa2110cb LM |
66 | static int set_copy_dsdt(const struct dmi_system_id *id) |
67 | { | |
68 | printk(KERN_NOTICE "%s detected - " | |
69 | "force copy of DSDT to local memory\n", id->ident); | |
70 | acpi_gbl_copy_dsdt_locally = 1; | |
71 | return 0; | |
72 | } | |
8df7e870 | 73 | #endif |
aa2110cb LM |
74 | |
75 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
76 | /* | |
100cf877 | 77 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
78 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
79 | */ | |
80 | { | |
81 | .callback = set_copy_dsdt, | |
100cf877 | 82 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
83 | .matches = { |
84 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 85 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 86 | }, |
cce4f632 LM |
87 | }, |
88 | {} | |
aa2110cb | 89 | }; |
cce4f632 LM |
90 | #else |
91 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
92 | {} | |
93 | }; | |
94 | #endif | |
aa2110cb | 95 | |
1da177e4 LT |
96 | /* -------------------------------------------------------------------------- |
97 | Device Management | |
98 | -------------------------------------------------------------------------- */ | |
99 | ||
4be44fcd | 100 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 101 | { |
4be44fcd | 102 | acpi_status status = AE_OK; |
1da177e4 | 103 | |
1da177e4 LT |
104 | |
105 | if (!device) | |
d550d98d | 106 | return -EINVAL; |
1da177e4 LT |
107 | |
108 | /* TBD: Support fixed-feature devices */ | |
109 | ||
4be44fcd | 110 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 111 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
112 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
113 | handle)); | |
d550d98d | 114 | return -ENODEV; |
1da177e4 LT |
115 | } |
116 | ||
d550d98d | 117 | return 0; |
1da177e4 | 118 | } |
4be44fcd | 119 | |
1da177e4 LT |
120 | EXPORT_SYMBOL(acpi_bus_get_device); |
121 | ||
402ac536 BH |
122 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
123 | unsigned long long *sta) | |
1da177e4 | 124 | { |
402ac536 | 125 | acpi_status status; |
4be44fcd | 126 | |
402ac536 BH |
127 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
128 | if (ACPI_SUCCESS(status)) | |
129 | return AE_OK; | |
1da177e4 | 130 | |
402ac536 BH |
131 | if (status == AE_NOT_FOUND) { |
132 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
133 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
134 | return AE_OK; | |
1da177e4 | 135 | } |
402ac536 BH |
136 | return status; |
137 | } | |
1da177e4 | 138 | |
402ac536 BH |
139 | int acpi_bus_get_status(struct acpi_device *device) |
140 | { | |
141 | acpi_status status; | |
142 | unsigned long long sta; | |
143 | ||
144 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
145 | if (ACPI_FAILURE(status)) | |
146 | return -ENODEV; | |
147 | ||
148 | STRUCT_TO_INT(device->status) = (int) sta; | |
1da177e4 LT |
149 | |
150 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
151 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
152 | "functional but not present;\n", | |
153 | device->pnp.bus_id, | |
154 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
155 | } |
156 | ||
4be44fcd LB |
157 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
158 | device->pnp.bus_id, | |
159 | (u32) STRUCT_TO_INT(device->status))); | |
d550d98d | 160 | return 0; |
1da177e4 | 161 | } |
4be44fcd | 162 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 163 | |
20733939 | 164 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 165 | void *context) |
20733939 ZR |
166 | { |
167 | return; | |
168 | } | |
169 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
170 | ||
171 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
172 | { | |
173 | acpi_status status = AE_OK; | |
174 | ||
175 | if (!*data) | |
176 | return -EINVAL; | |
177 | ||
178 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
179 | if (ACPI_FAILURE(status) || !*data) { | |
180 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
181 | handle)); | |
182 | return -ENODEV; | |
183 | } | |
184 | ||
185 | return 0; | |
186 | } | |
187 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
188 | ||
70023de8 SL |
189 | static void acpi_print_osc_error(acpi_handle handle, |
190 | struct acpi_osc_context *context, char *error) | |
191 | { | |
192 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
193 | int i; | |
194 | ||
195 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
196 | printk(KERN_DEBUG "%s\n", error); | |
197 | else { | |
198 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
199 | kfree(buffer.pointer); | |
200 | } | |
201 | printk(KERN_DEBUG"_OSC request data:"); | |
202 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
203 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
204 | printk("\n"); | |
205 | } | |
206 | ||
70023de8 SL |
207 | static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
208 | { | |
209 | int i; | |
210 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
211 | 24, 26, 28, 30, 32, 34}; | |
212 | ||
213 | if (strlen(str) != 36) | |
214 | return AE_BAD_PARAMETER; | |
215 | for (i = 0; i < 36; i++) { | |
216 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
217 | if (str[i] != '-') | |
218 | return AE_BAD_PARAMETER; | |
219 | } else if (!isxdigit(str[i])) | |
220 | return AE_BAD_PARAMETER; | |
221 | } | |
222 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
223 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
224 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
225 | } |
226 | return AE_OK; | |
227 | } | |
228 | ||
229 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
230 | { | |
231 | acpi_status status; | |
232 | struct acpi_object_list input; | |
233 | union acpi_object in_params[4]; | |
234 | union acpi_object *out_obj; | |
235 | u8 uuid[16]; | |
236 | u32 errors; | |
9dc130fc | 237 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
238 | |
239 | if (!context) | |
240 | return AE_ERROR; | |
241 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
242 | return AE_ERROR; | |
243 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
244 | context->ret.pointer = NULL; | |
245 | ||
246 | /* Setting up input parameters */ | |
247 | input.count = 4; | |
248 | input.pointer = in_params; | |
249 | in_params[0].type = ACPI_TYPE_BUFFER; | |
250 | in_params[0].buffer.length = 16; | |
251 | in_params[0].buffer.pointer = uuid; | |
252 | in_params[1].type = ACPI_TYPE_INTEGER; | |
253 | in_params[1].integer.value = context->rev; | |
254 | in_params[2].type = ACPI_TYPE_INTEGER; | |
255 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
256 | in_params[3].type = ACPI_TYPE_BUFFER; | |
257 | in_params[3].buffer.length = context->cap.length; | |
258 | in_params[3].buffer.pointer = context->cap.pointer; | |
259 | ||
9dc130fc | 260 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
261 | if (ACPI_FAILURE(status)) |
262 | return status; | |
263 | ||
9dc130fc | 264 | if (!output.length) |
70023de8 SL |
265 | return AE_NULL_OBJECT; |
266 | ||
9dc130fc SL |
267 | out_obj = output.pointer; |
268 | if (out_obj->type != ACPI_TYPE_BUFFER | |
269 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
270 | acpi_print_osc_error(handle, context, |
271 | "_OSC evaluation returned wrong type"); | |
272 | status = AE_TYPE; | |
273 | goto out_kfree; | |
274 | } | |
275 | /* Need to ignore the bit0 in result code */ | |
276 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
277 | if (errors) { | |
278 | if (errors & OSC_REQUEST_ERROR) | |
279 | acpi_print_osc_error(handle, context, | |
280 | "_OSC request failed"); | |
281 | if (errors & OSC_INVALID_UUID_ERROR) | |
282 | acpi_print_osc_error(handle, context, | |
283 | "_OSC invalid UUID"); | |
284 | if (errors & OSC_INVALID_REVISION_ERROR) | |
285 | acpi_print_osc_error(handle, context, | |
286 | "_OSC invalid revision"); | |
287 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
288 | if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] | |
289 | & OSC_QUERY_ENABLE) | |
290 | goto out_success; | |
291 | status = AE_SUPPORT; | |
292 | goto out_kfree; | |
293 | } | |
294 | status = AE_ERROR; | |
295 | goto out_kfree; | |
296 | } | |
297 | out_success: | |
9dc130fc | 298 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
299 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
300 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
301 | if (!context->ret.pointer) { |
302 | status = AE_NO_MEMORY; | |
303 | goto out_kfree; | |
304 | } | |
9dc130fc | 305 | status = AE_OK; |
70023de8 SL |
306 | |
307 | out_kfree: | |
9dc130fc SL |
308 | kfree(output.pointer); |
309 | if (status != AE_OK) | |
310 | context->ret.pointer = NULL; | |
70023de8 SL |
311 | return status; |
312 | } | |
313 | EXPORT_SYMBOL(acpi_run_osc); | |
314 | ||
eccddd32 | 315 | bool osc_sb_apei_support_acked; |
3563ff96 SL |
316 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
317 | static void acpi_bus_osc_support(void) | |
318 | { | |
319 | u32 capbuf[2]; | |
320 | struct acpi_osc_context context = { | |
321 | .uuid_str = sb_uuid_str, | |
322 | .rev = 1, | |
323 | .cap.length = 8, | |
324 | .cap.pointer = capbuf, | |
325 | }; | |
326 | acpi_handle handle; | |
327 | ||
328 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | |
329 | capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
6a4e2b75 ZY |
330 | #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ |
331 | defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) | |
3563ff96 SL |
332 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; |
333 | #endif | |
6a4e2b75 ZY |
334 | |
335 | #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) | |
336 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; | |
337 | #endif | |
eccddd32 | 338 | |
c2f4191a TK |
339 | #ifdef ACPI_HOTPLUG_OST |
340 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT; | |
341 | #endif | |
342 | ||
eccddd32 HY |
343 | if (!ghes_disable) |
344 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT; | |
3563ff96 SL |
345 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
346 | return; | |
eccddd32 HY |
347 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
348 | u32 *capbuf_ret = context.ret.pointer; | |
349 | if (context.ret.length > OSC_SUPPORT_TYPE) | |
350 | osc_sb_apei_support_acked = | |
351 | capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT; | |
3563ff96 | 352 | kfree(context.ret.pointer); |
eccddd32 HY |
353 | } |
354 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
355 | } |
356 | ||
1da177e4 LT |
357 | /* -------------------------------------------------------------------------- |
358 | Event Management | |
359 | -------------------------------------------------------------------------- */ | |
360 | ||
14e04fb3 | 361 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
362 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
363 | ||
364 | LIST_HEAD(acpi_bus_event_list); | |
365 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
366 | ||
4be44fcd | 367 | extern int event_is_open; |
1da177e4 | 368 | |
8db85d4c | 369 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 370 | { |
8db85d4c | 371 | struct acpi_bus_event *event; |
4be44fcd | 372 | unsigned long flags = 0; |
1da177e4 | 373 | |
1da177e4 LT |
374 | /* drop event on the floor if no one's listening */ |
375 | if (!event_is_open) | |
d550d98d | 376 | return 0; |
1da177e4 | 377 | |
5cc4a0f6 | 378 | event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
1da177e4 | 379 | if (!event) |
d550d98d | 380 | return -ENOMEM; |
1da177e4 | 381 | |
8db85d4c AS |
382 | strcpy(event->device_class, device_class); |
383 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
384 | event->type = type; |
385 | event->data = data; | |
386 | ||
387 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
388 | list_add_tail(&event->node, &acpi_bus_event_list); | |
389 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
390 | ||
391 | wake_up_interruptible(&acpi_bus_event_queue); | |
392 | ||
d550d98d | 393 | return 0; |
8db85d4c AS |
394 | |
395 | } | |
396 | ||
397 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
398 | ||
399 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
400 | { | |
401 | if (!device) | |
402 | return -EINVAL; | |
403 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
404 | device->pnp.bus_id, type, data); | |
1da177e4 | 405 | } |
4be44fcd | 406 | |
14e04fb3 | 407 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 408 | |
4be44fcd | 409 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 410 | { |
4be44fcd LB |
411 | unsigned long flags = 0; |
412 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
413 | |
414 | DECLARE_WAITQUEUE(wait, current); | |
415 | ||
1da177e4 LT |
416 | |
417 | if (!event) | |
d550d98d | 418 | return -EINVAL; |
1da177e4 LT |
419 | |
420 | if (list_empty(&acpi_bus_event_list)) { | |
421 | ||
422 | set_current_state(TASK_INTERRUPTIBLE); | |
423 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
424 | ||
425 | if (list_empty(&acpi_bus_event_list)) | |
426 | schedule(); | |
427 | ||
428 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
429 | set_current_state(TASK_RUNNING); | |
430 | ||
431 | if (signal_pending(current)) | |
d550d98d | 432 | return -ERESTARTSYS; |
1da177e4 LT |
433 | } |
434 | ||
435 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
436 | if (!list_empty(&acpi_bus_event_list)) { |
437 | entry = list_entry(acpi_bus_event_list.next, | |
438 | struct acpi_bus_event, node); | |
1da177e4 | 439 | list_del(&entry->node); |
f0a37e00 | 440 | } |
1da177e4 LT |
441 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
442 | ||
443 | if (!entry) | |
d550d98d | 444 | return -ENODEV; |
1da177e4 LT |
445 | |
446 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
447 | ||
448 | kfree(entry); | |
449 | ||
d550d98d | 450 | return 0; |
1da177e4 | 451 | } |
1da177e4 | 452 | |
14e04fb3 | 453 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
454 | |
455 | /* -------------------------------------------------------------------------- | |
456 | Notification Handling | |
457 | -------------------------------------------------------------------------- */ | |
458 | ||
ff754e2e | 459 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 460 | { |
ff754e2e | 461 | struct acpi_device *device; |
cdd5b8ca | 462 | acpi_status status; |
1da177e4 LT |
463 | struct acpi_device_status old_status; |
464 | ||
ff754e2e BH |
465 | if (acpi_bus_get_device(handle, &device)) |
466 | return; | |
1da177e4 | 467 | if (!device) |
cdd5b8ca | 468 | return; |
1da177e4 | 469 | |
1da177e4 LT |
470 | old_status = device->status; |
471 | ||
472 | /* | |
473 | * Make sure this device's parent is present before we go about | |
474 | * messing with the device. | |
475 | */ | |
476 | if (device->parent && !device->parent->status.present) { | |
477 | device->status = device->parent->status; | |
cdd5b8ca | 478 | return; |
1da177e4 LT |
479 | } |
480 | ||
481 | status = acpi_bus_get_status(device); | |
482 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 483 | return; |
1da177e4 LT |
484 | |
485 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 486 | return; |
1da177e4 | 487 | |
1da177e4 LT |
488 | /* |
489 | * Device Insertion/Removal | |
490 | */ | |
491 | if ((device->status.present) && !(old_status.present)) { | |
492 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
493 | /* TBD: Handle device insertion */ | |
4be44fcd | 494 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
495 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
496 | /* TBD: Handle device removal */ | |
497 | } | |
1da177e4 LT |
498 | } |
499 | ||
ff754e2e | 500 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 501 | { |
1da177e4 | 502 | /* Status Change? */ |
ff754e2e | 503 | acpi_bus_check_device(handle); |
1da177e4 | 504 | |
1da177e4 LT |
505 | /* |
506 | * TBD: Enumerate child devices within this device's scope and | |
507 | * run acpi_bus_check_device()'s on them. | |
508 | */ | |
1da177e4 LT |
509 | } |
510 | ||
6bd00a61 SL |
511 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
512 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
513 | { | |
514 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
515 | } | |
516 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
517 | ||
518 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
519 | { | |
520 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
521 | } | |
522 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
523 | ||
1da177e4 LT |
524 | /** |
525 | * acpi_bus_notify | |
526 | * --------------- | |
527 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
528 | */ | |
4be44fcd | 529 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 530 | { |
4be44fcd | 531 | struct acpi_device *device = NULL; |
6d278131 | 532 | struct acpi_driver *driver; |
1da177e4 | 533 | |
02c37bd8 BH |
534 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
535 | type, handle)); | |
536 | ||
6bd00a61 SL |
537 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
538 | type, (void *)handle); | |
1da177e4 | 539 | |
1da177e4 LT |
540 | switch (type) { |
541 | ||
542 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 543 | acpi_bus_check_scope(handle); |
aafbcd16 | 544 | /* |
1da177e4 | 545 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 546 | * drivers via the device manager (device.c). |
1da177e4 LT |
547 | */ |
548 | break; | |
549 | ||
550 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 551 | acpi_bus_check_device(handle); |
aafbcd16 | 552 | /* |
1da177e4 | 553 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 554 | * drivers via the device manager (device.c). |
1da177e4 LT |
555 | */ |
556 | break; | |
557 | ||
558 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
559 | /* TBD */ |
560 | break; | |
561 | ||
562 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
563 | /* TBD */ |
564 | break; | |
565 | ||
566 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
567 | /* TBD: Exactly what does 'light' mean? */ |
568 | break; | |
569 | ||
570 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
571 | /* TBD */ |
572 | break; | |
573 | ||
574 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
575 | /* TBD */ |
576 | break; | |
577 | ||
578 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
579 | /* TBD */ |
580 | break; | |
581 | ||
582 | default: | |
4be44fcd LB |
583 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
584 | "Received unknown/unsupported notification [%08x]\n", | |
585 | type)); | |
1da177e4 LT |
586 | break; |
587 | } | |
588 | ||
ff754e2e BH |
589 | acpi_bus_get_device(handle, &device); |
590 | if (device) { | |
591 | driver = device->driver; | |
592 | if (driver && driver->ops.notify && | |
593 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
594 | driver->ops.notify(device, type); | |
595 | } | |
1da177e4 LT |
596 | } |
597 | ||
598 | /* -------------------------------------------------------------------------- | |
599 | Initialization/Cleanup | |
600 | -------------------------------------------------------------------------- */ | |
601 | ||
4be44fcd | 602 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 603 | { |
4be44fcd LB |
604 | acpi_status status = AE_OK; |
605 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
606 | struct acpi_object_list arg_list = { 1, &arg }; | |
607 | char *message = NULL; | |
1da177e4 | 608 | |
1da177e4 | 609 | |
aafbcd16 | 610 | /* |
1da177e4 LT |
611 | * Let the system know what interrupt model we are using by |
612 | * evaluating the \_PIC object, if exists. | |
613 | */ | |
614 | ||
615 | switch (acpi_irq_model) { | |
616 | case ACPI_IRQ_MODEL_PIC: | |
617 | message = "PIC"; | |
618 | break; | |
619 | case ACPI_IRQ_MODEL_IOAPIC: | |
620 | message = "IOAPIC"; | |
621 | break; | |
622 | case ACPI_IRQ_MODEL_IOSAPIC: | |
623 | message = "IOSAPIC"; | |
624 | break; | |
3948ec94 JK |
625 | case ACPI_IRQ_MODEL_PLATFORM: |
626 | message = "platform specific model"; | |
627 | break; | |
1da177e4 LT |
628 | default: |
629 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 630 | return -ENODEV; |
1da177e4 LT |
631 | } |
632 | ||
633 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
634 | ||
635 | arg.integer.value = acpi_irq_model; | |
636 | ||
637 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
638 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 639 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 640 | return -ENODEV; |
1da177e4 LT |
641 | } |
642 | ||
d550d98d | 643 | return 0; |
1da177e4 LT |
644 | } |
645 | ||
67a119f9 | 646 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
647 | |
648 | ||
4be44fcd | 649 | void __init acpi_early_init(void) |
1da177e4 | 650 | { |
4be44fcd | 651 | acpi_status status = AE_OK; |
1da177e4 LT |
652 | |
653 | if (acpi_disabled) | |
d550d98d | 654 | return; |
1da177e4 | 655 | |
61686124 BM |
656 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
657 | ||
1da177e4 LT |
658 | /* enable workarounds, unless strict ACPI spec. compliance */ |
659 | if (!acpi_strict) | |
660 | acpi_gbl_enable_interpreter_slack = TRUE; | |
661 | ||
ad71860a AS |
662 | acpi_gbl_permanent_mmap = 1; |
663 | ||
aa2110cb LM |
664 | /* |
665 | * If the machine falls into the DMI check table, | |
666 | * DSDT will be copied to memory | |
667 | */ | |
668 | dmi_check_system(dsdt_dmi_table); | |
669 | ||
ad71860a AS |
670 | status = acpi_reallocate_root_table(); |
671 | if (ACPI_FAILURE(status)) { | |
672 | printk(KERN_ERR PREFIX | |
673 | "Unable to reallocate ACPI tables\n"); | |
674 | goto error0; | |
675 | } | |
676 | ||
1da177e4 LT |
677 | status = acpi_initialize_subsystem(); |
678 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
679 | printk(KERN_ERR PREFIX |
680 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
681 | goto error0; |
682 | } | |
683 | ||
684 | status = acpi_load_tables(); | |
685 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
686 | printk(KERN_ERR PREFIX |
687 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
688 | goto error0; |
689 | } | |
690 | ||
1da177e4 LT |
691 | #ifdef CONFIG_X86 |
692 | if (!acpi_ioapic) { | |
1da177e4 | 693 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
694 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
695 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
696 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
697 | } | |
1da177e4 | 698 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 699 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 700 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 701 | } else { |
1da177e4 | 702 | /* |
cee324b1 | 703 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
704 | * update it with result from INT_SRC_OVR parsing |
705 | */ | |
cee324b1 | 706 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
707 | } |
708 | #endif | |
709 | ||
4505a201 | 710 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
711 | if (ACPI_FAILURE(status)) { |
712 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
713 | goto error0; | |
714 | } | |
715 | ||
1ea15c44 MB |
716 | /* |
717 | * If the system is using ACPI then we can be reasonably | |
718 | * confident that any regulators are managed by the firmware | |
719 | * so tell the regulator core it has everything it needs to | |
720 | * know. | |
721 | */ | |
722 | regulator_has_full_constraints(); | |
723 | ||
d550d98d | 724 | return; |
1da177e4 | 725 | |
4be44fcd | 726 | error0: |
1da177e4 | 727 | disable_acpi(); |
d550d98d | 728 | return; |
1da177e4 LT |
729 | } |
730 | ||
4be44fcd | 731 | static int __init acpi_bus_init(void) |
1da177e4 | 732 | { |
4be44fcd LB |
733 | int result = 0; |
734 | acpi_status status = AE_OK; | |
735 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 736 | |
176f9c18 | 737 | acpi_os_initialize1(); |
1da177e4 | 738 | |
4505a201 | 739 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
1da177e4 | 740 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
741 | printk(KERN_ERR PREFIX |
742 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
743 | goto error1; |
744 | } | |
745 | ||
1da177e4 LT |
746 | /* |
747 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
748 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
749 | * is called). | |
750 | * | |
aafbcd16 | 751 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
752 | * the EC parameters out of that. |
753 | */ | |
754 | status = acpi_ec_ecdt_probe(); | |
755 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 LT |
756 | |
757 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
758 | if (ACPI_FAILURE(status)) { | |
759 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
760 | goto error1; | |
761 | } | |
762 | ||
fc54ab72 LM |
763 | /* |
764 | * _OSC method may exist in module level code, | |
765 | * so it must be run after ACPI_FULL_INITIALIZATION | |
766 | */ | |
767 | acpi_bus_osc_support(); | |
768 | ||
b1d248d9 ZR |
769 | /* |
770 | * _PDC control method may load dynamic SSDT tables, | |
771 | * and we need to install the table handler before that. | |
772 | */ | |
773 | acpi_sysfs_init(); | |
774 | ||
78f16996 AC |
775 | acpi_early_processor_set_pdc(); |
776 | ||
455c8793 ZY |
777 | /* |
778 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
779 | * is necessary to enable it as early as possible. | |
780 | */ | |
781 | acpi_boot_ec_enable(); | |
782 | ||
1da177e4 LT |
783 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
784 | ||
aafbcd16 AS |
785 | /* Initialize sleep structures */ |
786 | acpi_sleep_init(); | |
787 | ||
1da177e4 LT |
788 | /* |
789 | * Get the system interrupt model and evaluate \_PIC. | |
790 | */ | |
791 | result = acpi_bus_init_irq(); | |
792 | if (result) | |
793 | goto error1; | |
794 | ||
795 | /* | |
796 | * Register the for all standard device notifications. | |
797 | */ | |
4be44fcd LB |
798 | status = |
799 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
800 | &acpi_bus_notify, NULL); | |
1da177e4 | 801 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
802 | printk(KERN_ERR PREFIX |
803 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
804 | goto error1; |
805 | } | |
806 | ||
807 | /* | |
808 | * Create the top ACPI proc directory | |
809 | */ | |
810 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
811 | ||
d550d98d | 812 | return 0; |
1da177e4 LT |
813 | |
814 | /* Mimic structured exception handling */ | |
4be44fcd | 815 | error1: |
1da177e4 | 816 | acpi_terminate(); |
d550d98d | 817 | return -ENODEV; |
1da177e4 LT |
818 | } |
819 | ||
99e0d2fc | 820 | struct kobject *acpi_kobj; |
f2d4753f | 821 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 822 | |
4be44fcd | 823 | static int __init acpi_init(void) |
1da177e4 | 824 | { |
6831c6ed | 825 | int result; |
1da177e4 | 826 | |
1da177e4 LT |
827 | if (acpi_disabled) { |
828 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 829 | return -ENODEV; |
1da177e4 LT |
830 | } |
831 | ||
f62ed9e3 | 832 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 833 | if (!acpi_kobj) { |
96b2dd1f | 834 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
835 | acpi_kobj = NULL; |
836 | } | |
1da177e4 | 837 | |
0e46517d | 838 | init_acpi_device_notify(); |
1da177e4 | 839 | result = acpi_bus_init(); |
6831c6ed | 840 | if (result) { |
1da177e4 | 841 | disable_acpi(); |
81d0273d | 842 | return result; |
6831c6ed | 843 | } |
81d0273d | 844 | |
6831c6ed | 845 | pci_mmcfg_late_init(); |
e747f274 | 846 | acpi_scan_init(); |
a5f820fe | 847 | acpi_ec_init(); |
a25ee920 | 848 | acpi_debugfs_init(); |
9cee43e0 | 849 | acpi_sleep_proc_init(); |
201b8c65 | 850 | acpi_wakeup_device_init(); |
6831c6ed | 851 | return 0; |
1da177e4 LT |
852 | } |
853 | ||
854 | subsys_initcall(acpi_init); |