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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> |
1da177e4 LT |
36 | #ifdef CONFIG_X86 |
37 | #include <asm/mpspec.h> | |
38 | #endif | |
7752d5cf | 39 | #include <linux/pci.h> |
1da177e4 LT |
40 | #include <acpi/acpi_bus.h> |
41 | #include <acpi/acpi_drivers.h> | |
eccddd32 | 42 | #include <acpi/apei.h> |
eb27cae8 | 43 | #include <linux/dmi.h> |
cd51e61c | 44 | #include <linux/suspend.h> |
1da177e4 | 45 | |
e60cc7a6 BH |
46 | #include "internal.h" |
47 | ||
1da177e4 | 48 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 49 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 50 | |
4be44fcd LB |
51 | struct acpi_device *acpi_root; |
52 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
53 | EXPORT_SYMBOL(acpi_root_dir); |
54 | ||
55 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
56 | ||
6415e12b | 57 | |
cce4f632 | 58 | #ifdef CONFIG_X86 |
aa2110cb LM |
59 | static int set_copy_dsdt(const struct dmi_system_id *id) |
60 | { | |
61 | printk(KERN_NOTICE "%s detected - " | |
62 | "force copy of DSDT to local memory\n", id->ident); | |
63 | acpi_gbl_copy_dsdt_locally = 1; | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
68 | /* | |
100cf877 | 69 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
70 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
71 | */ | |
72 | { | |
73 | .callback = set_copy_dsdt, | |
100cf877 | 74 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
75 | .matches = { |
76 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 77 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 78 | }, |
cce4f632 LM |
79 | }, |
80 | {} | |
aa2110cb | 81 | }; |
cce4f632 LM |
82 | #else |
83 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
84 | {} | |
85 | }; | |
86 | #endif | |
aa2110cb | 87 | |
1da177e4 LT |
88 | /* -------------------------------------------------------------------------- |
89 | Device Management | |
90 | -------------------------------------------------------------------------- */ | |
91 | ||
4be44fcd | 92 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 93 | { |
6a8c0af6 | 94 | acpi_status status; |
1da177e4 LT |
95 | |
96 | if (!device) | |
d550d98d | 97 | return -EINVAL; |
1da177e4 LT |
98 | |
99 | /* TBD: Support fixed-feature devices */ | |
100 | ||
4be44fcd | 101 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 102 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
103 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
104 | handle)); | |
d550d98d | 105 | return -ENODEV; |
1da177e4 LT |
106 | } |
107 | ||
d550d98d | 108 | return 0; |
1da177e4 | 109 | } |
4be44fcd | 110 | |
1da177e4 LT |
111 | EXPORT_SYMBOL(acpi_bus_get_device); |
112 | ||
402ac536 BH |
113 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
114 | unsigned long long *sta) | |
1da177e4 | 115 | { |
402ac536 | 116 | acpi_status status; |
4be44fcd | 117 | |
402ac536 BH |
118 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
119 | if (ACPI_SUCCESS(status)) | |
120 | return AE_OK; | |
1da177e4 | 121 | |
402ac536 BH |
122 | if (status == AE_NOT_FOUND) { |
123 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
124 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
125 | return AE_OK; | |
1da177e4 | 126 | } |
402ac536 BH |
127 | return status; |
128 | } | |
1da177e4 | 129 | |
402ac536 BH |
130 | int acpi_bus_get_status(struct acpi_device *device) |
131 | { | |
132 | acpi_status status; | |
133 | unsigned long long sta; | |
134 | ||
135 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
136 | if (ACPI_FAILURE(status)) | |
137 | return -ENODEV; | |
138 | ||
139 | STRUCT_TO_INT(device->status) = (int) sta; | |
1da177e4 LT |
140 | |
141 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
142 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
143 | "functional but not present;\n", | |
144 | device->pnp.bus_id, | |
145 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
146 | } |
147 | ||
4be44fcd LB |
148 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
149 | device->pnp.bus_id, | |
150 | (u32) STRUCT_TO_INT(device->status))); | |
d550d98d | 151 | return 0; |
1da177e4 | 152 | } |
4be44fcd | 153 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 154 | |
20733939 | 155 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 156 | void *context) |
20733939 ZR |
157 | { |
158 | return; | |
159 | } | |
160 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
161 | ||
162 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
163 | { | |
6a8c0af6 | 164 | acpi_status status; |
20733939 ZR |
165 | |
166 | if (!*data) | |
167 | return -EINVAL; | |
168 | ||
169 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
170 | if (ACPI_FAILURE(status) || !*data) { | |
171 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
172 | handle)); | |
173 | return -ENODEV; | |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
179 | ||
70023de8 SL |
180 | static void acpi_print_osc_error(acpi_handle handle, |
181 | struct acpi_osc_context *context, char *error) | |
182 | { | |
183 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
184 | int i; | |
185 | ||
186 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
187 | printk(KERN_DEBUG "%s\n", error); | |
188 | else { | |
189 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
190 | kfree(buffer.pointer); | |
191 | } | |
192 | printk(KERN_DEBUG"_OSC request data:"); | |
193 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
194 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
195 | printk("\n"); | |
196 | } | |
197 | ||
70023de8 SL |
198 | static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
199 | { | |
200 | int i; | |
201 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
202 | 24, 26, 28, 30, 32, 34}; | |
203 | ||
204 | if (strlen(str) != 36) | |
205 | return AE_BAD_PARAMETER; | |
206 | for (i = 0; i < 36; i++) { | |
207 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
208 | if (str[i] != '-') | |
209 | return AE_BAD_PARAMETER; | |
210 | } else if (!isxdigit(str[i])) | |
211 | return AE_BAD_PARAMETER; | |
212 | } | |
213 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
214 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
215 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
216 | } |
217 | return AE_OK; | |
218 | } | |
219 | ||
220 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
221 | { | |
222 | acpi_status status; | |
223 | struct acpi_object_list input; | |
224 | union acpi_object in_params[4]; | |
225 | union acpi_object *out_obj; | |
226 | u8 uuid[16]; | |
227 | u32 errors; | |
9dc130fc | 228 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
229 | |
230 | if (!context) | |
231 | return AE_ERROR; | |
232 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
233 | return AE_ERROR; | |
234 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
235 | context->ret.pointer = NULL; | |
236 | ||
237 | /* Setting up input parameters */ | |
238 | input.count = 4; | |
239 | input.pointer = in_params; | |
240 | in_params[0].type = ACPI_TYPE_BUFFER; | |
241 | in_params[0].buffer.length = 16; | |
242 | in_params[0].buffer.pointer = uuid; | |
243 | in_params[1].type = ACPI_TYPE_INTEGER; | |
244 | in_params[1].integer.value = context->rev; | |
245 | in_params[2].type = ACPI_TYPE_INTEGER; | |
246 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
247 | in_params[3].type = ACPI_TYPE_BUFFER; | |
248 | in_params[3].buffer.length = context->cap.length; | |
249 | in_params[3].buffer.pointer = context->cap.pointer; | |
250 | ||
9dc130fc | 251 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
252 | if (ACPI_FAILURE(status)) |
253 | return status; | |
254 | ||
9dc130fc | 255 | if (!output.length) |
70023de8 SL |
256 | return AE_NULL_OBJECT; |
257 | ||
9dc130fc SL |
258 | out_obj = output.pointer; |
259 | if (out_obj->type != ACPI_TYPE_BUFFER | |
260 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
261 | acpi_print_osc_error(handle, context, |
262 | "_OSC evaluation returned wrong type"); | |
263 | status = AE_TYPE; | |
264 | goto out_kfree; | |
265 | } | |
266 | /* Need to ignore the bit0 in result code */ | |
267 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
268 | if (errors) { | |
269 | if (errors & OSC_REQUEST_ERROR) | |
270 | acpi_print_osc_error(handle, context, | |
271 | "_OSC request failed"); | |
272 | if (errors & OSC_INVALID_UUID_ERROR) | |
273 | acpi_print_osc_error(handle, context, | |
274 | "_OSC invalid UUID"); | |
275 | if (errors & OSC_INVALID_REVISION_ERROR) | |
276 | acpi_print_osc_error(handle, context, | |
277 | "_OSC invalid revision"); | |
278 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
279 | if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] | |
280 | & OSC_QUERY_ENABLE) | |
281 | goto out_success; | |
282 | status = AE_SUPPORT; | |
283 | goto out_kfree; | |
284 | } | |
285 | status = AE_ERROR; | |
286 | goto out_kfree; | |
287 | } | |
288 | out_success: | |
9dc130fc | 289 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
290 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
291 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
292 | if (!context->ret.pointer) { |
293 | status = AE_NO_MEMORY; | |
294 | goto out_kfree; | |
295 | } | |
9dc130fc | 296 | status = AE_OK; |
70023de8 SL |
297 | |
298 | out_kfree: | |
9dc130fc SL |
299 | kfree(output.pointer); |
300 | if (status != AE_OK) | |
301 | context->ret.pointer = NULL; | |
70023de8 SL |
302 | return status; |
303 | } | |
304 | EXPORT_SYMBOL(acpi_run_osc); | |
305 | ||
eccddd32 | 306 | bool osc_sb_apei_support_acked; |
3563ff96 SL |
307 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
308 | static void acpi_bus_osc_support(void) | |
309 | { | |
310 | u32 capbuf[2]; | |
311 | struct acpi_osc_context context = { | |
312 | .uuid_str = sb_uuid_str, | |
313 | .rev = 1, | |
314 | .cap.length = 8, | |
315 | .cap.pointer = capbuf, | |
316 | }; | |
317 | acpi_handle handle; | |
318 | ||
319 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | |
320 | capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
6a4e2b75 ZY |
321 | #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ |
322 | defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) | |
3563ff96 SL |
323 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; |
324 | #endif | |
6a4e2b75 ZY |
325 | |
326 | #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) | |
327 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; | |
328 | #endif | |
eccddd32 | 329 | |
c2f4191a TK |
330 | #ifdef ACPI_HOTPLUG_OST |
331 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT; | |
332 | #endif | |
333 | ||
eccddd32 HY |
334 | if (!ghes_disable) |
335 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT; | |
3563ff96 SL |
336 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
337 | return; | |
eccddd32 HY |
338 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
339 | u32 *capbuf_ret = context.ret.pointer; | |
340 | if (context.ret.length > OSC_SUPPORT_TYPE) | |
341 | osc_sb_apei_support_acked = | |
342 | capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT; | |
3563ff96 | 343 | kfree(context.ret.pointer); |
eccddd32 HY |
344 | } |
345 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
346 | } |
347 | ||
1da177e4 LT |
348 | /* -------------------------------------------------------------------------- |
349 | Event Management | |
350 | -------------------------------------------------------------------------- */ | |
351 | ||
14e04fb3 | 352 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
353 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
354 | ||
355 | LIST_HEAD(acpi_bus_event_list); | |
356 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
357 | ||
4be44fcd | 358 | extern int event_is_open; |
1da177e4 | 359 | |
8db85d4c | 360 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 361 | { |
8db85d4c | 362 | struct acpi_bus_event *event; |
6a8c0af6 | 363 | unsigned long flags; |
1da177e4 | 364 | |
1da177e4 LT |
365 | /* drop event on the floor if no one's listening */ |
366 | if (!event_is_open) | |
d550d98d | 367 | return 0; |
1da177e4 | 368 | |
5cc4a0f6 | 369 | event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
1da177e4 | 370 | if (!event) |
d550d98d | 371 | return -ENOMEM; |
1da177e4 | 372 | |
8db85d4c AS |
373 | strcpy(event->device_class, device_class); |
374 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
375 | event->type = type; |
376 | event->data = data; | |
377 | ||
378 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
379 | list_add_tail(&event->node, &acpi_bus_event_list); | |
380 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
381 | ||
382 | wake_up_interruptible(&acpi_bus_event_queue); | |
383 | ||
d550d98d | 384 | return 0; |
8db85d4c AS |
385 | |
386 | } | |
387 | ||
388 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
389 | ||
390 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
391 | { | |
392 | if (!device) | |
393 | return -EINVAL; | |
394 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
395 | device->pnp.bus_id, type, data); | |
1da177e4 | 396 | } |
4be44fcd | 397 | |
14e04fb3 | 398 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 399 | |
4be44fcd | 400 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 401 | { |
6a8c0af6 | 402 | unsigned long flags; |
4be44fcd | 403 | struct acpi_bus_event *entry = NULL; |
1da177e4 LT |
404 | |
405 | DECLARE_WAITQUEUE(wait, current); | |
406 | ||
1da177e4 LT |
407 | |
408 | if (!event) | |
d550d98d | 409 | return -EINVAL; |
1da177e4 LT |
410 | |
411 | if (list_empty(&acpi_bus_event_list)) { | |
412 | ||
413 | set_current_state(TASK_INTERRUPTIBLE); | |
414 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
415 | ||
416 | if (list_empty(&acpi_bus_event_list)) | |
417 | schedule(); | |
418 | ||
419 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
420 | set_current_state(TASK_RUNNING); | |
421 | ||
422 | if (signal_pending(current)) | |
d550d98d | 423 | return -ERESTARTSYS; |
1da177e4 LT |
424 | } |
425 | ||
426 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
427 | if (!list_empty(&acpi_bus_event_list)) { |
428 | entry = list_entry(acpi_bus_event_list.next, | |
429 | struct acpi_bus_event, node); | |
1da177e4 | 430 | list_del(&entry->node); |
f0a37e00 | 431 | } |
1da177e4 LT |
432 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
433 | ||
434 | if (!entry) | |
d550d98d | 435 | return -ENODEV; |
1da177e4 LT |
436 | |
437 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
438 | ||
439 | kfree(entry); | |
440 | ||
d550d98d | 441 | return 0; |
1da177e4 | 442 | } |
1da177e4 | 443 | |
14e04fb3 | 444 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
445 | |
446 | /* -------------------------------------------------------------------------- | |
447 | Notification Handling | |
448 | -------------------------------------------------------------------------- */ | |
449 | ||
ff754e2e | 450 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 451 | { |
ff754e2e | 452 | struct acpi_device *device; |
cdd5b8ca | 453 | acpi_status status; |
1da177e4 LT |
454 | struct acpi_device_status old_status; |
455 | ||
ff754e2e BH |
456 | if (acpi_bus_get_device(handle, &device)) |
457 | return; | |
1da177e4 | 458 | if (!device) |
cdd5b8ca | 459 | return; |
1da177e4 | 460 | |
1da177e4 LT |
461 | old_status = device->status; |
462 | ||
463 | /* | |
464 | * Make sure this device's parent is present before we go about | |
465 | * messing with the device. | |
466 | */ | |
467 | if (device->parent && !device->parent->status.present) { | |
468 | device->status = device->parent->status; | |
cdd5b8ca | 469 | return; |
1da177e4 LT |
470 | } |
471 | ||
472 | status = acpi_bus_get_status(device); | |
473 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 474 | return; |
1da177e4 LT |
475 | |
476 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 477 | return; |
1da177e4 | 478 | |
1da177e4 LT |
479 | /* |
480 | * Device Insertion/Removal | |
481 | */ | |
482 | if ((device->status.present) && !(old_status.present)) { | |
483 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
484 | /* TBD: Handle device insertion */ | |
4be44fcd | 485 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
486 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
487 | /* TBD: Handle device removal */ | |
488 | } | |
1da177e4 LT |
489 | } |
490 | ||
ff754e2e | 491 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 492 | { |
1da177e4 | 493 | /* Status Change? */ |
ff754e2e | 494 | acpi_bus_check_device(handle); |
1da177e4 | 495 | |
1da177e4 LT |
496 | /* |
497 | * TBD: Enumerate child devices within this device's scope and | |
498 | * run acpi_bus_check_device()'s on them. | |
499 | */ | |
1da177e4 LT |
500 | } |
501 | ||
6bd00a61 SL |
502 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
503 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
504 | { | |
505 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
506 | } | |
507 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
508 | ||
509 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
510 | { | |
511 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
512 | } | |
513 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
514 | ||
1da177e4 LT |
515 | /** |
516 | * acpi_bus_notify | |
517 | * --------------- | |
518 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
519 | */ | |
4be44fcd | 520 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 521 | { |
4be44fcd | 522 | struct acpi_device *device = NULL; |
6d278131 | 523 | struct acpi_driver *driver; |
1da177e4 | 524 | |
02c37bd8 BH |
525 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
526 | type, handle)); | |
527 | ||
6bd00a61 SL |
528 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
529 | type, (void *)handle); | |
1da177e4 | 530 | |
1da177e4 LT |
531 | switch (type) { |
532 | ||
533 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 534 | acpi_bus_check_scope(handle); |
aafbcd16 | 535 | /* |
1da177e4 | 536 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 537 | * drivers via the device manager (device.c). |
1da177e4 LT |
538 | */ |
539 | break; | |
540 | ||
541 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 542 | acpi_bus_check_device(handle); |
aafbcd16 | 543 | /* |
1da177e4 | 544 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 545 | * drivers via the device manager (device.c). |
1da177e4 LT |
546 | */ |
547 | break; | |
548 | ||
549 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
550 | /* TBD */ |
551 | break; | |
552 | ||
553 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
554 | /* TBD */ |
555 | break; | |
556 | ||
557 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
558 | /* TBD: Exactly what does 'light' mean? */ |
559 | break; | |
560 | ||
561 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
562 | /* TBD */ |
563 | break; | |
564 | ||
565 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
566 | /* TBD */ |
567 | break; | |
568 | ||
569 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
570 | /* TBD */ |
571 | break; | |
572 | ||
573 | default: | |
4be44fcd LB |
574 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
575 | "Received unknown/unsupported notification [%08x]\n", | |
576 | type)); | |
1da177e4 LT |
577 | break; |
578 | } | |
579 | ||
ff754e2e BH |
580 | acpi_bus_get_device(handle, &device); |
581 | if (device) { | |
582 | driver = device->driver; | |
583 | if (driver && driver->ops.notify && | |
584 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
585 | driver->ops.notify(device, type); | |
586 | } | |
1da177e4 LT |
587 | } |
588 | ||
589 | /* -------------------------------------------------------------------------- | |
590 | Initialization/Cleanup | |
591 | -------------------------------------------------------------------------- */ | |
592 | ||
4be44fcd | 593 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 594 | { |
6a8c0af6 | 595 | acpi_status status; |
4be44fcd LB |
596 | union acpi_object arg = { ACPI_TYPE_INTEGER }; |
597 | struct acpi_object_list arg_list = { 1, &arg }; | |
598 | char *message = NULL; | |
1da177e4 | 599 | |
1da177e4 | 600 | |
aafbcd16 | 601 | /* |
1da177e4 LT |
602 | * Let the system know what interrupt model we are using by |
603 | * evaluating the \_PIC object, if exists. | |
604 | */ | |
605 | ||
606 | switch (acpi_irq_model) { | |
607 | case ACPI_IRQ_MODEL_PIC: | |
608 | message = "PIC"; | |
609 | break; | |
610 | case ACPI_IRQ_MODEL_IOAPIC: | |
611 | message = "IOAPIC"; | |
612 | break; | |
613 | case ACPI_IRQ_MODEL_IOSAPIC: | |
614 | message = "IOSAPIC"; | |
615 | break; | |
3948ec94 JK |
616 | case ACPI_IRQ_MODEL_PLATFORM: |
617 | message = "platform specific model"; | |
618 | break; | |
1da177e4 LT |
619 | default: |
620 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 621 | return -ENODEV; |
1da177e4 LT |
622 | } |
623 | ||
624 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
625 | ||
626 | arg.integer.value = acpi_irq_model; | |
627 | ||
628 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
629 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 630 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 631 | return -ENODEV; |
1da177e4 LT |
632 | } |
633 | ||
d550d98d | 634 | return 0; |
1da177e4 LT |
635 | } |
636 | ||
67a119f9 | 637 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
638 | |
639 | ||
4be44fcd | 640 | void __init acpi_early_init(void) |
1da177e4 | 641 | { |
6a8c0af6 | 642 | acpi_status status; |
1da177e4 LT |
643 | |
644 | if (acpi_disabled) | |
d550d98d | 645 | return; |
1da177e4 | 646 | |
61686124 BM |
647 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
648 | ||
1da177e4 LT |
649 | /* enable workarounds, unless strict ACPI spec. compliance */ |
650 | if (!acpi_strict) | |
651 | acpi_gbl_enable_interpreter_slack = TRUE; | |
652 | ||
ad71860a AS |
653 | acpi_gbl_permanent_mmap = 1; |
654 | ||
aa2110cb LM |
655 | /* |
656 | * If the machine falls into the DMI check table, | |
657 | * DSDT will be copied to memory | |
658 | */ | |
659 | dmi_check_system(dsdt_dmi_table); | |
660 | ||
ad71860a AS |
661 | status = acpi_reallocate_root_table(); |
662 | if (ACPI_FAILURE(status)) { | |
663 | printk(KERN_ERR PREFIX | |
664 | "Unable to reallocate ACPI tables\n"); | |
665 | goto error0; | |
666 | } | |
667 | ||
1da177e4 LT |
668 | status = acpi_initialize_subsystem(); |
669 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
670 | printk(KERN_ERR PREFIX |
671 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
672 | goto error0; |
673 | } | |
674 | ||
675 | status = acpi_load_tables(); | |
676 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
677 | printk(KERN_ERR PREFIX |
678 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
679 | goto error0; |
680 | } | |
681 | ||
1da177e4 LT |
682 | #ifdef CONFIG_X86 |
683 | if (!acpi_ioapic) { | |
1da177e4 | 684 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
685 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
686 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
687 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
688 | } | |
1da177e4 | 689 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 690 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 691 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 692 | } else { |
1da177e4 | 693 | /* |
cee324b1 | 694 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
695 | * update it with result from INT_SRC_OVR parsing |
696 | */ | |
cee324b1 | 697 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
698 | } |
699 | #endif | |
700 | ||
4505a201 | 701 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
702 | if (ACPI_FAILURE(status)) { |
703 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
704 | goto error0; | |
705 | } | |
706 | ||
d550d98d | 707 | return; |
1da177e4 | 708 | |
4be44fcd | 709 | error0: |
1da177e4 | 710 | disable_acpi(); |
d550d98d | 711 | return; |
1da177e4 LT |
712 | } |
713 | ||
4be44fcd | 714 | static int __init acpi_bus_init(void) |
1da177e4 | 715 | { |
6a8c0af6 BH |
716 | int result; |
717 | acpi_status status; | |
4be44fcd | 718 | extern acpi_status acpi_os_initialize1(void); |
1da177e4 | 719 | |
176f9c18 | 720 | acpi_os_initialize1(); |
1da177e4 | 721 | |
4505a201 | 722 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
1da177e4 | 723 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
724 | printk(KERN_ERR PREFIX |
725 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
726 | goto error1; |
727 | } | |
728 | ||
1da177e4 LT |
729 | /* |
730 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
731 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
732 | * is called). | |
733 | * | |
aafbcd16 | 734 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
735 | * the EC parameters out of that. |
736 | */ | |
737 | status = acpi_ec_ecdt_probe(); | |
738 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 LT |
739 | |
740 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
741 | if (ACPI_FAILURE(status)) { | |
742 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
743 | goto error1; | |
744 | } | |
745 | ||
fc54ab72 LM |
746 | /* |
747 | * _OSC method may exist in module level code, | |
748 | * so it must be run after ACPI_FULL_INITIALIZATION | |
749 | */ | |
750 | acpi_bus_osc_support(); | |
751 | ||
b1d248d9 ZR |
752 | /* |
753 | * _PDC control method may load dynamic SSDT tables, | |
754 | * and we need to install the table handler before that. | |
755 | */ | |
756 | acpi_sysfs_init(); | |
757 | ||
78f16996 AC |
758 | acpi_early_processor_set_pdc(); |
759 | ||
455c8793 ZY |
760 | /* |
761 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
762 | * is necessary to enable it as early as possible. | |
763 | */ | |
764 | acpi_boot_ec_enable(); | |
765 | ||
1da177e4 LT |
766 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
767 | ||
aafbcd16 AS |
768 | /* Initialize sleep structures */ |
769 | acpi_sleep_init(); | |
770 | ||
1da177e4 LT |
771 | /* |
772 | * Get the system interrupt model and evaluate \_PIC. | |
773 | */ | |
774 | result = acpi_bus_init_irq(); | |
775 | if (result) | |
776 | goto error1; | |
777 | ||
778 | /* | |
779 | * Register the for all standard device notifications. | |
780 | */ | |
4be44fcd LB |
781 | status = |
782 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
783 | &acpi_bus_notify, NULL); | |
1da177e4 | 784 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
785 | printk(KERN_ERR PREFIX |
786 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
787 | goto error1; |
788 | } | |
789 | ||
790 | /* | |
791 | * Create the top ACPI proc directory | |
792 | */ | |
793 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
794 | ||
d550d98d | 795 | return 0; |
1da177e4 LT |
796 | |
797 | /* Mimic structured exception handling */ | |
4be44fcd | 798 | error1: |
1da177e4 | 799 | acpi_terminate(); |
d550d98d | 800 | return -ENODEV; |
1da177e4 LT |
801 | } |
802 | ||
99e0d2fc | 803 | struct kobject *acpi_kobj; |
f2d4753f | 804 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 805 | |
4be44fcd | 806 | static int __init acpi_init(void) |
1da177e4 | 807 | { |
6831c6ed | 808 | int result; |
1da177e4 | 809 | |
1da177e4 LT |
810 | if (acpi_disabled) { |
811 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 812 | return -ENODEV; |
1da177e4 LT |
813 | } |
814 | ||
f62ed9e3 | 815 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 816 | if (!acpi_kobj) { |
96b2dd1f | 817 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
818 | acpi_kobj = NULL; |
819 | } | |
1da177e4 | 820 | |
0e46517d | 821 | init_acpi_device_notify(); |
1da177e4 | 822 | result = acpi_bus_init(); |
6831c6ed | 823 | if (result) { |
1da177e4 | 824 | disable_acpi(); |
81d0273d | 825 | return result; |
6831c6ed | 826 | } |
81d0273d | 827 | |
6831c6ed | 828 | pci_mmcfg_late_init(); |
e747f274 | 829 | acpi_scan_init(); |
a5f820fe | 830 | acpi_ec_init(); |
a25ee920 | 831 | acpi_debugfs_init(); |
9cee43e0 | 832 | acpi_sleep_proc_init(); |
201b8c65 | 833 | acpi_wakeup_device_init(); |
6831c6ed | 834 | return 0; |
1da177e4 LT |
835 | } |
836 | ||
837 | subsys_initcall(acpi_init); |