blob: 8b67bd0f6bb5e629d77de4b18490c0f64e329ad6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Randy Dunlapd568df82006-07-12 01:47:00 -040028#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#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>
Harvey Harrison6697c052008-02-09 23:24:08 +010034#include <linux/acpi.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090035#include <linux/slab.h>
Mark Brown49a12872014-01-27 00:32:14 +000036#include <linux/regulator/machine.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#ifdef CONFIG_X86
38#include <asm/mpspec.h>
39#endif
Robert Hancock7752d5c2008-02-15 01:27:20 -080040#include <linux/pci.h>
Huang Yingeccddd32011-07-13 13:14:20 +080041#include <acpi/apei.h>
Len Browneb27cae2009-07-06 23:40:19 -040042#include <linux/dmi.h>
Rafael J. Wysockicd51e61c2011-02-11 00:04:52 +010043#include <linux/suspend.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Bjorn Helgaase60cc7a2009-03-13 12:08:26 -060045#include "internal.h"
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#define _COMPONENT ACPI_BUS_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050048ACPI_MODULE_NAME("bus");
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Len Brown4be44fc2005-08-05 00:44:28 -040050struct acpi_device *acpi_root;
51struct proc_dir_entry *acpi_root_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052EXPORT_SYMBOL(acpi_root_dir);
53
Lin Mingcce4f632010-05-12 09:26:48 +080054#ifdef CONFIG_X86
Lv Zheng73577d12014-05-12 15:50:16 +080055#ifdef CONFIG_ACPI_CUSTOM_DSDT
56static inline int set_copy_dsdt(const struct dmi_system_id *id)
57{
58 return 0;
59}
60#else
Lin Mingaa2110c2010-04-08 14:34:27 +080061static int set_copy_dsdt(const struct dmi_system_id *id)
62{
63 printk(KERN_NOTICE "%s detected - "
64 "force copy of DSDT to local memory\n", id->ident);
65 acpi_gbl_copy_dsdt_locally = 1;
66 return 0;
67}
Lv Zheng73577d12014-05-12 15:50:16 +080068#endif
Lin Mingaa2110c2010-04-08 14:34:27 +080069
70static struct dmi_system_id dsdt_dmi_table[] __initdata = {
71 /*
Len Brown100cf872010-09-28 22:57:02 -040072 * Invoke DSDT corruption work-around on all Toshiba Satellite.
Lin Mingaa2110c2010-04-08 14:34:27 +080073 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
74 */
75 {
76 .callback = set_copy_dsdt,
Len Brown100cf872010-09-28 22:57:02 -040077 .ident = "TOSHIBA Satellite",
Lin Mingaa2110c2010-04-08 14:34:27 +080078 .matches = {
79 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
Len Brown100cf872010-09-28 22:57:02 -040080 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
Lin Mingaa2110c2010-04-08 14:34:27 +080081 },
Lin Mingcce4f632010-05-12 09:26:48 +080082 },
83 {}
Lin Mingaa2110c2010-04-08 14:34:27 +080084};
Lin Mingcce4f632010-05-12 09:26:48 +080085#else
86static struct dmi_system_id dsdt_dmi_table[] __initdata = {
87 {}
88};
89#endif
Lin Mingaa2110c2010-04-08 14:34:27 +080090
Linus Torvalds1da177e2005-04-16 15:20:36 -070091/* --------------------------------------------------------------------------
92 Device Management
93 -------------------------------------------------------------------------- */
94
Bjorn Helgaas402ac532009-09-21 19:30:01 +000095acpi_status acpi_bus_get_status_handle(acpi_handle handle,
96 unsigned long long *sta)
97{
98 acpi_status status;
99
100 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
101 if (ACPI_SUCCESS(status))
102 return AE_OK;
103
104 if (status == AE_NOT_FOUND) {
105 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
106 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
107 return AE_OK;
108 }
109 return status;
110}
111
Len Brown4be44fc2005-08-05 00:44:28 -0400112int acpi_bus_get_status(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113{
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000114 acpi_status status;
115 unsigned long long sta;
Len Brown4be44fc2005-08-05 00:44:28 -0400116
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000117 status = acpi_bus_get_status_handle(device->handle, &sta);
118 if (ACPI_FAILURE(status))
119 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Rafael J. Wysocki25db1152013-11-22 21:56:06 +0100121 acpi_set_device_status(device, sta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123 if (device->status.functional && !device->status.present) {
Zhao Yakui39a0ad82008-08-11 13:40:22 +0800124 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
125 "functional but not present;\n",
Rafael J. Wysocki25db1152013-11-22 21:56:06 +0100126 device->pnp.bus_id, (u32)sta));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 }
128
Len Brown4be44fc2005-08-05 00:44:28 -0400129 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
Rafael J. Wysocki25db1152013-11-22 21:56:06 +0100130 device->pnp.bus_id, (u32)sta));
Patrick Mocheld550d982006-06-27 00:41:40 -0400131 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132}
Len Brown4be44fc2005-08-05 00:44:28 -0400133EXPORT_SYMBOL(acpi_bus_get_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Zhang Rui20733932008-01-17 15:51:21 +0800135void acpi_bus_private_data_handler(acpi_handle handle,
Bob Moore8e4319c2009-06-29 13:43:27 +0800136 void *context)
Zhang Rui20733932008-01-17 15:51:21 +0800137{
138 return;
139}
140EXPORT_SYMBOL(acpi_bus_private_data_handler);
141
Lan Tianyu72013792014-05-20 20:59:21 +0800142int acpi_bus_attach_private_data(acpi_handle handle, void *data)
143{
144 acpi_status status;
145
146 status = acpi_attach_data(handle,
147 acpi_bus_private_data_handler, data);
148 if (ACPI_FAILURE(status)) {
149 acpi_handle_debug(handle, "Error attaching device data\n");
150 return -ENODEV;
151 }
152
153 return 0;
154}
155EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
156
Zhang Rui20733932008-01-17 15:51:21 +0800157int acpi_bus_get_private_data(acpi_handle handle, void **data)
158{
Bjorn Helgaas6a8c0af2013-06-03 18:20:24 +0000159 acpi_status status;
Zhang Rui20733932008-01-17 15:51:21 +0800160
161 if (!*data)
162 return -EINVAL;
163
164 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
Lan Tianyu72013792014-05-20 20:59:21 +0800165 if (ACPI_FAILURE(status)) {
166 acpi_handle_debug(handle, "No context for object\n");
Zhang Rui20733932008-01-17 15:51:21 +0800167 return -ENODEV;
168 }
169
170 return 0;
171}
Lan Tianyu72013792014-05-20 20:59:21 +0800172EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
173
174void acpi_bus_detach_private_data(acpi_handle handle)
175{
176 acpi_detach_data(handle, acpi_bus_private_data_handler);
177}
178EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
Zhang Rui20733932008-01-17 15:51:21 +0800179
Shaohua Li70023de2009-10-29 11:04:28 +0800180static 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
Chen, Gong4b3db702013-10-21 14:29:25 -0700198acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
Shaohua Li70023de2009-10-29 11:04:28 +0800199{
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++) {
Andy Shevchenko965fd9e2010-05-24 14:33:28 -0700214 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]);
Shaohua Li70023de2009-10-29 11:04:28 +0800216 }
217 return AE_OK;
218}
Chen, Gong4b3db702013-10-21 14:29:25 -0700219EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
Shaohua Li70023de2009-10-29 11:04:28 +0800220
221acpi_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;
Shaohua Li9dc130f2009-12-23 17:04:11 +0800229 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
Shaohua Li70023de2009-10-29 11:04:28 +0800230
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
Shaohua Li9dc130f2009-12-23 17:04:11 +0800252 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
Shaohua Li70023de2009-10-29 11:04:28 +0800253 if (ACPI_FAILURE(status))
254 return status;
255
Shaohua Li9dc130f2009-12-23 17:04:11 +0800256 if (!output.length)
Shaohua Li70023de2009-10-29 11:04:28 +0800257 return AE_NULL_OBJECT;
258
Shaohua Li9dc130f2009-12-23 17:04:11 +0800259 out_obj = output.pointer;
260 if (out_obj->type != ACPI_TYPE_BUFFER
261 || out_obj->buffer.length != context->cap.length) {
Shaohua Li70023de2009-10-29 11:04:28 +0800262 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) {
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600280 if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
Shaohua Li70023de2009-10-29 11:04:28 +0800281 & 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 }
289out_success:
Shaohua Li9dc130f2009-12-23 17:04:11 +0800290 context->ret.length = out_obj->buffer.length;
Andrei Epuree2cb5f02013-03-11 08:20:16 +0000291 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
292 context->ret.length, GFP_KERNEL);
Shaohua Li9dc130f2009-12-23 17:04:11 +0800293 if (!context->ret.pointer) {
294 status = AE_NO_MEMORY;
295 goto out_kfree;
296 }
Shaohua Li9dc130f2009-12-23 17:04:11 +0800297 status = AE_OK;
Shaohua Li70023de2009-10-29 11:04:28 +0800298
299out_kfree:
Shaohua Li9dc130f2009-12-23 17:04:11 +0800300 kfree(output.pointer);
301 if (status != AE_OK)
302 context->ret.pointer = NULL;
Shaohua Li70023de2009-10-29 11:04:28 +0800303 return status;
304}
305EXPORT_SYMBOL(acpi_run_osc);
306
Huang Yingeccddd32011-07-13 13:14:20 +0800307bool osc_sb_apei_support_acked;
Shaohua Li3563ff92009-10-29 11:05:05 +0800308static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
309static void acpi_bus_osc_support(void)
310{
311 u32 capbuf[2];
312 struct acpi_osc_context context = {
313 .uuid_str = sb_uuid_str,
314 .rev = 1,
315 .cap.length = 8,
316 .cap.pointer = capbuf,
317 };
318 acpi_handle handle;
319
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600320 capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
321 capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800322#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
323 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600324 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
Shaohua Li3563ff92009-10-29 11:05:05 +0800325#endif
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800326
327#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600328 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800329#endif
Huang Yingeccddd32011-07-13 13:14:20 +0800330
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600331 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
Toshi Kanic2f41912012-05-23 20:25:24 -0600332
Huang Yingeccddd32011-07-13 13:14:20 +0800333 if (!ghes_disable)
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600334 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
Shaohua Li3563ff92009-10-29 11:05:05 +0800335 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
336 return;
Huang Yingeccddd32011-07-13 13:14:20 +0800337 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
338 u32 *capbuf_ret = context.ret.pointer;
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600339 if (context.ret.length > OSC_SUPPORT_DWORD)
Huang Yingeccddd32011-07-13 13:14:20 +0800340 osc_sb_apei_support_acked =
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600341 capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
Shaohua Li3563ff92009-10-29 11:05:05 +0800342 kfree(context.ret.pointer);
Huang Yingeccddd32011-07-13 13:14:20 +0800343 }
344 /* do we need to check other returned cap? Sounds no */
Shaohua Li3563ff92009-10-29 11:05:05 +0800345}
346
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 Notification Handling
349 -------------------------------------------------------------------------- */
350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351/**
352 * acpi_bus_notify
353 * ---------------
354 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
355 */
Len Brown4be44fc2005-08-05 00:44:28 -0400356static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357{
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100358 struct acpi_device *adev;
Bjorn Helgaas6d278132009-04-30 09:35:37 -0600359 struct acpi_driver *driver;
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100360 u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
Rafael J. Wysockid0103382014-05-01 01:16:06 +0200361 bool hotplug_event = false;
Bjorn Helgaas02c37bd2009-05-22 11:43:41 -0600362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 switch (type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 case ACPI_NOTIFY_BUS_CHECK:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100365 acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
Rafael J. Wysockid0103382014-05-01 01:16:06 +0200366 hotplug_event = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 break;
368
369 case ACPI_NOTIFY_DEVICE_CHECK:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100370 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
Rafael J. Wysockid0103382014-05-01 01:16:06 +0200371 hotplug_event = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 break;
373
374 case ACPI_NOTIFY_DEVICE_WAKE:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100375 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 break;
377
378 case ACPI_NOTIFY_EJECT_REQUEST:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100379 acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
Rafael J. Wysockid0103382014-05-01 01:16:06 +0200380 hotplug_event = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 break;
382
383 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100384 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 /* TBD: Exactly what does 'light' mean? */
386 break;
387
388 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100389 acpi_handle_err(handle, "Device cannot be configured due "
390 "to a frequency mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 break;
392
393 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100394 acpi_handle_err(handle, "Device cannot be configured due "
395 "to a bus mode mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 break;
397
398 case ACPI_NOTIFY_POWER_FAULT:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100399 acpi_handle_err(handle, "Device has suffered a power fault\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 break;
401
402 default:
Rafael J. Wysockif66abe92014-04-24 19:27:49 +0200403 acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
404 break;
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100405 }
406
407 adev = acpi_bus_get_acpi_device(handle);
408 if (!adev)
409 goto err;
410
411 driver = adev->driver;
412 if (driver && driver->ops.notify &&
413 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
414 driver->ops.notify(adev, type);
415
Rafael J. Wysockid0103382014-05-01 01:16:06 +0200416 if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type)))
417 return;
418
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100419 acpi_bus_put_acpi_device(adev);
420 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100422 err:
Rafael J. Wysocki700b8422014-02-21 01:07:17 +0100423 acpi_evaluate_ost(handle, type, ost_code, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424}
425
426/* --------------------------------------------------------------------------
427 Initialization/Cleanup
428 -------------------------------------------------------------------------- */
429
Len Brown4be44fc2005-08-05 00:44:28 -0400430static int __init acpi_bus_init_irq(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431{
Bjorn Helgaas6a8c0af2013-06-03 18:20:24 +0000432 acpi_status status;
Len Brown4be44fc2005-08-05 00:44:28 -0400433 char *message = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500436 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 * Let the system know what interrupt model we are using by
438 * evaluating the \_PIC object, if exists.
439 */
440
441 switch (acpi_irq_model) {
442 case ACPI_IRQ_MODEL_PIC:
443 message = "PIC";
444 break;
445 case ACPI_IRQ_MODEL_IOAPIC:
446 message = "IOAPIC";
447 break;
448 case ACPI_IRQ_MODEL_IOSAPIC:
449 message = "IOSAPIC";
450 break;
John Keller3948ec92006-12-22 11:50:04 -0600451 case ACPI_IRQ_MODEL_PLATFORM:
452 message = "platform specific model";
453 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 default:
455 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400456 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 }
458
459 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
460
Jiang Liu0db98202013-06-29 00:24:39 +0800461 status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400463 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400464 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 }
466
Patrick Mocheld550d982006-06-27 00:41:40 -0400467 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468}
469
Len Brown4be44fc2005-08-05 00:44:28 -0400470void __init acpi_early_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
Bjorn Helgaas6a8c0af2013-06-03 18:20:24 +0000472 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474 if (acpi_disabled)
Patrick Mocheld550d982006-06-27 00:41:40 -0400475 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
Bob Moore616861242006-03-17 16:44:00 -0500477 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
478
Lv Zheng4fc0a7e2014-05-31 08:15:02 +0800479 /* It's safe to verify table checksums during late stage */
480 acpi_gbl_verify_table_checksum = TRUE;
481
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 /* enable workarounds, unless strict ACPI spec. compliance */
483 if (!acpi_strict)
484 acpi_gbl_enable_interpreter_slack = TRUE;
485
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300486 acpi_gbl_permanent_mmap = 1;
487
Lin Mingaa2110c2010-04-08 14:34:27 +0800488 /*
489 * If the machine falls into the DMI check table,
490 * DSDT will be copied to memory
491 */
492 dmi_check_system(dsdt_dmi_table);
493
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300494 status = acpi_reallocate_root_table();
495 if (ACPI_FAILURE(status)) {
496 printk(KERN_ERR PREFIX
497 "Unable to reallocate ACPI tables\n");
498 goto error0;
499 }
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 status = acpi_initialize_subsystem();
502 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400503 printk(KERN_ERR PREFIX
504 "Unable to initialize the ACPI Interpreter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 goto error0;
506 }
507
508 status = acpi_load_tables();
509 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400510 printk(KERN_ERR PREFIX
511 "Unable to load the System Description Tables\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 goto error0;
513 }
514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515#ifdef CONFIG_X86
516 if (!acpi_ioapic) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 /* compatible (0) means level (3) */
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300518 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
519 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
520 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
521 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 /* Set PIC-mode SCI trigger type */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300523 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300524 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 /*
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300527 * now that acpi_gbl_FADT is initialized,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 * update it with result from INT_SRC_OVR parsing
529 */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300530 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 }
532#endif
533
Rafael J. Wysocki4505a202011-11-06 14:20:42 +0100534 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 if (ACPI_FAILURE(status)) {
536 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
537 goto error0;
538 }
539
Mark Brown49a12872014-01-27 00:32:14 +0000540 /*
541 * If the system is using ACPI then we can be reasonably
542 * confident that any regulators are managed by the firmware
543 * so tell the regulator core it has everything it needs to
544 * know.
545 */
546 regulator_has_full_constraints();
547
Patrick Mocheld550d982006-06-27 00:41:40 -0400548 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
Len Brown4be44fc2005-08-05 00:44:28 -0400550 error0:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 disable_acpi();
Patrick Mocheld550d982006-06-27 00:41:40 -0400552 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553}
554
Len Brown4be44fc2005-08-05 00:44:28 -0400555static int __init acpi_bus_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
Bjorn Helgaas6a8c0af2013-06-03 18:20:24 +0000557 int result;
558 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Jiri Slaby176f9c12009-03-04 11:55:27 -0800560 acpi_os_initialize1();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
Rafael J. Wysocki4505a202011-11-06 14:20:42 +0100562 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400564 printk(KERN_ERR PREFIX
565 "Unable to start the ACPI Interpreter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 goto error1;
567 }
568
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 /*
570 * ACPI 2.0 requires the EC driver to be loaded and work before
571 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
572 * is called).
573 *
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500574 * This is accomplished by looking for the ECDT table, and getting
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 * the EC parameters out of that.
576 */
577 status = acpi_ec_ecdt_probe();
578 /* Ignore result. Not having an ECDT is not fatal. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
580 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
581 if (ACPI_FAILURE(status)) {
582 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
583 goto error1;
584 }
585
Zhang Ruib1d248d2010-10-26 10:06:54 +0800586 /*
Lin Mingfc54ab72012-07-16 16:30:21 +0800587 * _OSC method may exist in module level code,
588 * so it must be run after ACPI_FULL_INITIALIZATION
589 */
590 acpi_bus_osc_support();
591
592 /*
Zhang Ruib1d248d2010-10-26 10:06:54 +0800593 * _PDC control method may load dynamic SSDT tables,
594 * and we need to install the table handler before that.
595 */
596 acpi_sysfs_init();
597
Alex Chiang78f16992009-12-20 12:19:09 -0700598 acpi_early_processor_set_pdc();
599
Zhao Yakui455c8792008-10-06 10:31:36 +0800600 /*
601 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
602 * is necessary to enable it as early as possible.
603 */
604 acpi_boot_ec_enable();
605
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 printk(KERN_INFO PREFIX "Interpreter enabled\n");
607
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500608 /* Initialize sleep structures */
609 acpi_sleep_init();
610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 /*
612 * Get the system interrupt model and evaluate \_PIC.
613 */
614 result = acpi_bus_init_irq();
615 if (result)
616 goto error1;
617
618 /*
619 * Register the for all standard device notifications.
620 */
Len Brown4be44fc2005-08-05 00:44:28 -0400621 status =
622 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
623 &acpi_bus_notify, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400625 printk(KERN_ERR PREFIX
626 "Unable to register for device notifications\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 goto error1;
628 }
629
630 /*
631 * Create the top ACPI proc directory
632 */
633 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
634
Patrick Mocheld550d982006-06-27 00:41:40 -0400635 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
637 /* Mimic structured exception handling */
Len Brown4be44fc2005-08-05 00:44:28 -0400638 error1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 acpi_terminate();
Patrick Mocheld550d982006-06-27 00:41:40 -0400640 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641}
642
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -0700643struct kobject *acpi_kobj;
Matthew Garrettf2d47532012-01-31 13:19:19 -0500644EXPORT_SYMBOL_GPL(acpi_kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
Len Brown4be44fc2005-08-05 00:44:28 -0400646static int __init acpi_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647{
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100648 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 if (acpi_disabled) {
651 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400652 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 }
654
Greg Kroah-Hartmanf62ed9e2007-11-05 13:16:15 -0800655 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -0700656 if (!acpi_kobj) {
Harvey Harrison96b2dd12008-03-05 18:24:51 -0800657 printk(KERN_WARNING "%s: kset create error\n", __func__);
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -0700658 acpi_kobj = NULL;
659 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660
Bjorn Helgaas0e465172009-03-24 16:50:09 -0600661 init_acpi_device_notify();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 result = acpi_bus_init();
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100663 if (result) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 disable_acpi();
Bjorn Helgaas81d02732009-03-24 16:49:38 -0600665 return result;
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100666 }
Bjorn Helgaas81d02732009-03-24 16:49:38 -0600667
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100668 pci_mmcfg_late_init();
Bjorn Helgaase747f272009-03-24 16:49:43 -0600669 acpi_scan_init();
Bjorn Helgaasa5f820f2009-03-24 16:49:48 -0600670 acpi_ec_init();
Zhang Ruia25ee922010-07-15 10:46:15 +0800671 acpi_debugfs_init();
Bjorn Helgaas9cee43e2009-03-24 16:50:14 -0600672 acpi_sleep_proc_init();
Bjorn Helgaas201b8c62009-03-24 16:50:19 -0600673 acpi_wakeup_device_init();
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100674 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675}
676
677subsys_initcall(acpi_init);