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