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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
Lin Mingaa2110c2010-04-08 14:34:27 +080055static int set_copy_dsdt(const struct dmi_system_id *id)
56{
57 printk(KERN_NOTICE "%s detected - "
58 "force copy of DSDT to local memory\n", id->ident);
59 acpi_gbl_copy_dsdt_locally = 1;
60 return 0;
61}
62
63static struct dmi_system_id dsdt_dmi_table[] __initdata = {
64 /*
Len Brown100cf872010-09-28 22:57:02 -040065 * Invoke DSDT corruption work-around on all Toshiba Satellite.
Lin Mingaa2110c2010-04-08 14:34:27 +080066 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
67 */
68 {
69 .callback = set_copy_dsdt,
Len Brown100cf872010-09-28 22:57:02 -040070 .ident = "TOSHIBA Satellite",
Lin Mingaa2110c2010-04-08 14:34:27 +080071 .matches = {
72 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
Len Brown100cf872010-09-28 22:57:02 -040073 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
Lin Mingaa2110c2010-04-08 14:34:27 +080074 },
Lin Mingcce4f632010-05-12 09:26:48 +080075 },
76 {}
Lin Mingaa2110c2010-04-08 14:34:27 +080077};
Lin Mingcce4f632010-05-12 09:26:48 +080078#else
79static struct dmi_system_id dsdt_dmi_table[] __initdata = {
80 {}
81};
82#endif
Lin Mingaa2110c2010-04-08 14:34:27 +080083
Linus Torvalds1da177e2005-04-16 15:20:36 -070084/* --------------------------------------------------------------------------
85 Device Management
86 -------------------------------------------------------------------------- */
87
Bjorn Helgaas402ac532009-09-21 19:30:01 +000088acpi_status acpi_bus_get_status_handle(acpi_handle handle,
89 unsigned long long *sta)
90{
91 acpi_status status;
92
93 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
94 if (ACPI_SUCCESS(status))
95 return AE_OK;
96
97 if (status == AE_NOT_FOUND) {
98 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
99 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
100 return AE_OK;
101 }
102 return status;
103}
104
Len Brown4be44fc2005-08-05 00:44:28 -0400105int acpi_bus_get_status(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106{
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000107 acpi_status status;
108 unsigned long long sta;
Len Brown4be44fc2005-08-05 00:44:28 -0400109
Bjorn Helgaas402ac532009-09-21 19:30:01 +0000110 status = acpi_bus_get_status_handle(device->handle, &sta);
111 if (ACPI_FAILURE(status))
112 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Rafael J. Wysocki25db1152013-11-22 21:56:06 +0100114 acpi_set_device_status(device, sta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116 if (device->status.functional && !device->status.present) {
Zhao Yakui39a0ad82008-08-11 13:40:22 +0800117 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
118 "functional but not present;\n",
Rafael J. Wysocki25db1152013-11-22 21:56:06 +0100119 device->pnp.bus_id, (u32)sta));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 }
121
Len Brown4be44fc2005-08-05 00:44:28 -0400122 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
Rafael J. Wysocki25db1152013-11-22 21:56:06 +0100123 device->pnp.bus_id, (u32)sta));
Patrick Mocheld550d982006-06-27 00:41:40 -0400124 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125}
Len Brown4be44fc2005-08-05 00:44:28 -0400126EXPORT_SYMBOL(acpi_bus_get_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Zhang Rui20733932008-01-17 15:51:21 +0800128void acpi_bus_private_data_handler(acpi_handle handle,
Bob Moore8e4319c2009-06-29 13:43:27 +0800129 void *context)
Zhang Rui20733932008-01-17 15:51:21 +0800130{
131 return;
132}
133EXPORT_SYMBOL(acpi_bus_private_data_handler);
134
135int acpi_bus_get_private_data(acpi_handle handle, void **data)
136{
Bjorn Helgaas6a8c0af2013-06-03 18:20:24 +0000137 acpi_status status;
Zhang Rui20733932008-01-17 15:51:21 +0800138
139 if (!*data)
140 return -EINVAL;
141
142 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
143 if (ACPI_FAILURE(status) || !*data) {
144 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
145 handle));
146 return -ENODEV;
147 }
148
149 return 0;
150}
151EXPORT_SYMBOL(acpi_bus_get_private_data);
152
Rafael J. Wysockif244d8b2013-12-31 13:39:42 +0100153void acpi_bus_no_hotplug(acpi_handle handle)
154{
155 struct acpi_device *adev = NULL;
156
157 acpi_bus_get_device(handle, &adev);
158 if (adev)
159 adev->flags.no_hotplug = true;
160}
161EXPORT_SYMBOL_GPL(acpi_bus_no_hotplug);
162
Shaohua Li70023de2009-10-29 11:04:28 +0800163static void acpi_print_osc_error(acpi_handle handle,
164 struct acpi_osc_context *context, char *error)
165{
166 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
167 int i;
168
169 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
170 printk(KERN_DEBUG "%s\n", error);
171 else {
172 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
173 kfree(buffer.pointer);
174 }
175 printk(KERN_DEBUG"_OSC request data:");
176 for (i = 0; i < context->cap.length; i += sizeof(u32))
177 printk("%x ", *((u32 *)(context->cap.pointer + i)));
178 printk("\n");
179}
180
Chen, Gong4b3db702013-10-21 14:29:25 -0700181acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
Shaohua Li70023de2009-10-29 11:04:28 +0800182{
183 int i;
184 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
185 24, 26, 28, 30, 32, 34};
186
187 if (strlen(str) != 36)
188 return AE_BAD_PARAMETER;
189 for (i = 0; i < 36; i++) {
190 if (i == 8 || i == 13 || i == 18 || i == 23) {
191 if (str[i] != '-')
192 return AE_BAD_PARAMETER;
193 } else if (!isxdigit(str[i]))
194 return AE_BAD_PARAMETER;
195 }
196 for (i = 0; i < 16; i++) {
Andy Shevchenko965fd9e2010-05-24 14:33:28 -0700197 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
198 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
Shaohua Li70023de2009-10-29 11:04:28 +0800199 }
200 return AE_OK;
201}
Chen, Gong4b3db702013-10-21 14:29:25 -0700202EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
Shaohua Li70023de2009-10-29 11:04:28 +0800203
204acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
205{
206 acpi_status status;
207 struct acpi_object_list input;
208 union acpi_object in_params[4];
209 union acpi_object *out_obj;
210 u8 uuid[16];
211 u32 errors;
Shaohua Li9dc130f2009-12-23 17:04:11 +0800212 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
Shaohua Li70023de2009-10-29 11:04:28 +0800213
214 if (!context)
215 return AE_ERROR;
216 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
217 return AE_ERROR;
218 context->ret.length = ACPI_ALLOCATE_BUFFER;
219 context->ret.pointer = NULL;
220
221 /* Setting up input parameters */
222 input.count = 4;
223 input.pointer = in_params;
224 in_params[0].type = ACPI_TYPE_BUFFER;
225 in_params[0].buffer.length = 16;
226 in_params[0].buffer.pointer = uuid;
227 in_params[1].type = ACPI_TYPE_INTEGER;
228 in_params[1].integer.value = context->rev;
229 in_params[2].type = ACPI_TYPE_INTEGER;
230 in_params[2].integer.value = context->cap.length/sizeof(u32);
231 in_params[3].type = ACPI_TYPE_BUFFER;
232 in_params[3].buffer.length = context->cap.length;
233 in_params[3].buffer.pointer = context->cap.pointer;
234
Shaohua Li9dc130f2009-12-23 17:04:11 +0800235 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
Shaohua Li70023de2009-10-29 11:04:28 +0800236 if (ACPI_FAILURE(status))
237 return status;
238
Shaohua Li9dc130f2009-12-23 17:04:11 +0800239 if (!output.length)
Shaohua Li70023de2009-10-29 11:04:28 +0800240 return AE_NULL_OBJECT;
241
Shaohua Li9dc130f2009-12-23 17:04:11 +0800242 out_obj = output.pointer;
243 if (out_obj->type != ACPI_TYPE_BUFFER
244 || out_obj->buffer.length != context->cap.length) {
Shaohua Li70023de2009-10-29 11:04:28 +0800245 acpi_print_osc_error(handle, context,
246 "_OSC evaluation returned wrong type");
247 status = AE_TYPE;
248 goto out_kfree;
249 }
250 /* Need to ignore the bit0 in result code */
251 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
252 if (errors) {
253 if (errors & OSC_REQUEST_ERROR)
254 acpi_print_osc_error(handle, context,
255 "_OSC request failed");
256 if (errors & OSC_INVALID_UUID_ERROR)
257 acpi_print_osc_error(handle, context,
258 "_OSC invalid UUID");
259 if (errors & OSC_INVALID_REVISION_ERROR)
260 acpi_print_osc_error(handle, context,
261 "_OSC invalid revision");
262 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600263 if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
Shaohua Li70023de2009-10-29 11:04:28 +0800264 & OSC_QUERY_ENABLE)
265 goto out_success;
266 status = AE_SUPPORT;
267 goto out_kfree;
268 }
269 status = AE_ERROR;
270 goto out_kfree;
271 }
272out_success:
Shaohua Li9dc130f2009-12-23 17:04:11 +0800273 context->ret.length = out_obj->buffer.length;
Andrei Epuree2cb5f02013-03-11 08:20:16 +0000274 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
275 context->ret.length, GFP_KERNEL);
Shaohua Li9dc130f2009-12-23 17:04:11 +0800276 if (!context->ret.pointer) {
277 status = AE_NO_MEMORY;
278 goto out_kfree;
279 }
Shaohua Li9dc130f2009-12-23 17:04:11 +0800280 status = AE_OK;
Shaohua Li70023de2009-10-29 11:04:28 +0800281
282out_kfree:
Shaohua Li9dc130f2009-12-23 17:04:11 +0800283 kfree(output.pointer);
284 if (status != AE_OK)
285 context->ret.pointer = NULL;
Shaohua Li70023de2009-10-29 11:04:28 +0800286 return status;
287}
288EXPORT_SYMBOL(acpi_run_osc);
289
Huang Yingeccddd32011-07-13 13:14:20 +0800290bool osc_sb_apei_support_acked;
Shaohua Li3563ff92009-10-29 11:05:05 +0800291static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
292static void acpi_bus_osc_support(void)
293{
294 u32 capbuf[2];
295 struct acpi_osc_context context = {
296 .uuid_str = sb_uuid_str,
297 .rev = 1,
298 .cap.length = 8,
299 .cap.pointer = capbuf,
300 };
301 acpi_handle handle;
302
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600303 capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
304 capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800305#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
306 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600307 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
Shaohua Li3563ff92009-10-29 11:05:05 +0800308#endif
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800309
310#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600311 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
Zhao Yakui6a4e2b72010-01-08 21:29:58 +0800312#endif
Huang Yingeccddd32011-07-13 13:14:20 +0800313
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600314 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
Toshi Kanic2f41912012-05-23 20:25:24 -0600315
Huang Yingeccddd32011-07-13 13:14:20 +0800316 if (!ghes_disable)
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600317 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
Shaohua Li3563ff92009-10-29 11:05:05 +0800318 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
319 return;
Huang Yingeccddd32011-07-13 13:14:20 +0800320 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
321 u32 *capbuf_ret = context.ret.pointer;
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600322 if (context.ret.length > OSC_SUPPORT_DWORD)
Huang Yingeccddd32011-07-13 13:14:20 +0800323 osc_sb_apei_support_acked =
Bjorn Helgaasb938a222013-09-05 15:05:54 -0600324 capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
Shaohua Li3563ff92009-10-29 11:05:05 +0800325 kfree(context.ret.pointer);
Huang Yingeccddd32011-07-13 13:14:20 +0800326 }
327 /* do we need to check other returned cap? Sounds no */
Shaohua Li3563ff92009-10-29 11:05:05 +0800328}
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 Notification Handling
332 -------------------------------------------------------------------------- */
333
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334/**
335 * acpi_bus_notify
336 * ---------------
337 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
338 */
Len Brown4be44fc2005-08-05 00:44:28 -0400339static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340{
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100341 struct acpi_device *adev;
Bjorn Helgaas6d278132009-04-30 09:35:37 -0600342 struct acpi_driver *driver;
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100343 acpi_status status;
344 u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
Bjorn Helgaas02c37bd2009-05-22 11:43:41 -0600345
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 switch (type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 case ACPI_NOTIFY_BUS_CHECK:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100348 acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 break;
350
351 case ACPI_NOTIFY_DEVICE_CHECK:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100352 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 break;
354
355 case ACPI_NOTIFY_DEVICE_WAKE:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100356 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 break;
358
359 case ACPI_NOTIFY_EJECT_REQUEST:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100360 acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 break;
362
363 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100364 acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 /* TBD: Exactly what does 'light' mean? */
366 break;
367
368 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100369 acpi_handle_err(handle, "Device cannot be configured due "
370 "to a frequency mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 break;
372
373 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100374 acpi_handle_err(handle, "Device cannot be configured due "
375 "to a bus mode mismatch\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 break;
377
378 case ACPI_NOTIFY_POWER_FAULT:
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100379 acpi_handle_err(handle, "Device has suffered a power fault\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 break;
381
382 default:
Rafael J. Wysockif66abe92014-04-24 19:27:49 +0200383 acpi_handle_debug(handle, "Unknown event type 0x%x\n", type);
384 break;
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100385 }
386
387 adev = acpi_bus_get_acpi_device(handle);
388 if (!adev)
389 goto err;
390
391 driver = adev->driver;
392 if (driver && driver->ops.notify &&
393 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
394 driver->ops.notify(adev, type);
395
396 switch (type) {
397 case ACPI_NOTIFY_BUS_CHECK:
398 case ACPI_NOTIFY_DEVICE_CHECK:
399 case ACPI_NOTIFY_EJECT_REQUEST:
Rafael J. Wysocki1e3bcb52014-03-03 00:40:38 +0100400 status = acpi_hotplug_schedule(adev, type);
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100401 if (ACPI_SUCCESS(status))
402 return;
403 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 break;
405 }
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100406 acpi_bus_put_acpi_device(adev);
407 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
Rafael J. Wysocki1a699472014-02-06 13:58:13 +0100409 err:
Rafael J. Wysocki700b8422014-02-21 01:07:17 +0100410 acpi_evaluate_ost(handle, type, ost_code, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411}
412
413/* --------------------------------------------------------------------------
414 Initialization/Cleanup
415 -------------------------------------------------------------------------- */
416
Len Brown4be44fc2005-08-05 00:44:28 -0400417static int __init acpi_bus_init_irq(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418{
Bjorn Helgaas6a8c0af2013-06-03 18:20:24 +0000419 acpi_status status;
Len Brown4be44fc2005-08-05 00:44:28 -0400420 char *message = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500423 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 * Let the system know what interrupt model we are using by
425 * evaluating the \_PIC object, if exists.
426 */
427
428 switch (acpi_irq_model) {
429 case ACPI_IRQ_MODEL_PIC:
430 message = "PIC";
431 break;
432 case ACPI_IRQ_MODEL_IOAPIC:
433 message = "IOAPIC";
434 break;
435 case ACPI_IRQ_MODEL_IOSAPIC:
436 message = "IOSAPIC";
437 break;
John Keller3948ec92006-12-22 11:50:04 -0600438 case ACPI_IRQ_MODEL_PLATFORM:
439 message = "platform specific model";
440 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 default:
442 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400443 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 }
445
446 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
447
Jiang Liu0db98202013-06-29 00:24:39 +0800448 status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400450 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400451 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 }
453
Patrick Mocheld550d982006-06-27 00:41:40 -0400454 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455}
456
Bob Moore67a119f2008-06-10 13:42:13 +0800457u8 acpi_gbl_permanent_mmap;
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300458
459
Len Brown4be44fc2005-08-05 00:44:28 -0400460void __init acpi_early_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461{
Bjorn Helgaas6a8c0af2013-06-03 18:20:24 +0000462 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
464 if (acpi_disabled)
Patrick Mocheld550d982006-06-27 00:41:40 -0400465 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Bob Moore616861242006-03-17 16:44:00 -0500467 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 /* enable workarounds, unless strict ACPI spec. compliance */
470 if (!acpi_strict)
471 acpi_gbl_enable_interpreter_slack = TRUE;
472
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300473 acpi_gbl_permanent_mmap = 1;
474
Lin Mingaa2110c2010-04-08 14:34:27 +0800475 /*
476 * If the machine falls into the DMI check table,
477 * DSDT will be copied to memory
478 */
479 dmi_check_system(dsdt_dmi_table);
480
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300481 status = acpi_reallocate_root_table();
482 if (ACPI_FAILURE(status)) {
483 printk(KERN_ERR PREFIX
484 "Unable to reallocate ACPI tables\n");
485 goto error0;
486 }
487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 status = acpi_initialize_subsystem();
489 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400490 printk(KERN_ERR PREFIX
491 "Unable to initialize the ACPI Interpreter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 goto error0;
493 }
494
495 status = acpi_load_tables();
496 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400497 printk(KERN_ERR PREFIX
498 "Unable to load the System Description Tables\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 goto error0;
500 }
501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502#ifdef CONFIG_X86
503 if (!acpi_ioapic) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 /* compatible (0) means level (3) */
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300505 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
506 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
507 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
508 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 /* Set PIC-mode SCI trigger type */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300510 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
Alexey Starikovskiy5f3b1a82007-02-02 19:48:22 +0300511 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 /*
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300514 * now that acpi_gbl_FADT is initialized,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 * update it with result from INT_SRC_OVR parsing
516 */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +0300517 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
519#endif
520
Rafael J. Wysocki4505a202011-11-06 14:20:42 +0100521 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if (ACPI_FAILURE(status)) {
523 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
524 goto error0;
525 }
526
Mark Brown49a12872014-01-27 00:32:14 +0000527 /*
528 * If the system is using ACPI then we can be reasonably
529 * confident that any regulators are managed by the firmware
530 * so tell the regulator core it has everything it needs to
531 * know.
532 */
533 regulator_has_full_constraints();
534
Patrick Mocheld550d982006-06-27 00:41:40 -0400535 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
Len Brown4be44fc2005-08-05 00:44:28 -0400537 error0:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 disable_acpi();
Patrick Mocheld550d982006-06-27 00:41:40 -0400539 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540}
541
Len Brown4be44fc2005-08-05 00:44:28 -0400542static int __init acpi_bus_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543{
Bjorn Helgaas6a8c0af2013-06-03 18:20:24 +0000544 int result;
545 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Jiri Slaby176f9c12009-03-04 11:55:27 -0800547 acpi_os_initialize1();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548
Rafael J. Wysocki4505a202011-11-06 14:20:42 +0100549 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400551 printk(KERN_ERR PREFIX
552 "Unable to start the ACPI Interpreter\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 goto error1;
554 }
555
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 /*
557 * ACPI 2.0 requires the EC driver to be loaded and work before
558 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
559 * is called).
560 *
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500561 * This is accomplished by looking for the ECDT table, and getting
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 * the EC parameters out of that.
563 */
564 status = acpi_ec_ecdt_probe();
565 /* Ignore result. Not having an ECDT is not fatal. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
567 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
568 if (ACPI_FAILURE(status)) {
569 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
570 goto error1;
571 }
572
Zhang Ruib1d248d2010-10-26 10:06:54 +0800573 /*
Lin Mingfc54ab72012-07-16 16:30:21 +0800574 * _OSC method may exist in module level code,
575 * so it must be run after ACPI_FULL_INITIALIZATION
576 */
577 acpi_bus_osc_support();
578
579 /*
Zhang Ruib1d248d2010-10-26 10:06:54 +0800580 * _PDC control method may load dynamic SSDT tables,
581 * and we need to install the table handler before that.
582 */
583 acpi_sysfs_init();
584
Alex Chiang78f16992009-12-20 12:19:09 -0700585 acpi_early_processor_set_pdc();
586
Zhao Yakui455c8792008-10-06 10:31:36 +0800587 /*
588 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
589 * is necessary to enable it as early as possible.
590 */
591 acpi_boot_ec_enable();
592
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 printk(KERN_INFO PREFIX "Interpreter enabled\n");
594
Alexey Starikovskiyaafbcd12007-02-10 01:32:16 -0500595 /* Initialize sleep structures */
596 acpi_sleep_init();
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 /*
599 * Get the system interrupt model and evaluate \_PIC.
600 */
601 result = acpi_bus_init_irq();
602 if (result)
603 goto error1;
604
605 /*
606 * Register the for all standard device notifications.
607 */
Len Brown4be44fc2005-08-05 00:44:28 -0400608 status =
609 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
610 &acpi_bus_notify, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400612 printk(KERN_ERR PREFIX
613 "Unable to register for device notifications\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 goto error1;
615 }
616
617 /*
618 * Create the top ACPI proc directory
619 */
620 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
621
Patrick Mocheld550d982006-06-27 00:41:40 -0400622 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
624 /* Mimic structured exception handling */
Len Brown4be44fc2005-08-05 00:44:28 -0400625 error1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 acpi_terminate();
Patrick Mocheld550d982006-06-27 00:41:40 -0400627 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628}
629
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -0700630struct kobject *acpi_kobj;
Matthew Garrettf2d47532012-01-31 13:19:19 -0500631EXPORT_SYMBOL_GPL(acpi_kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
Len Brown4be44fc2005-08-05 00:44:28 -0400633static int __init acpi_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634{
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100635 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 if (acpi_disabled) {
638 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400639 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 }
641
Greg Kroah-Hartmanf62ed9e2007-11-05 13:16:15 -0800642 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -0700643 if (!acpi_kobj) {
Harvey Harrison96b2dd12008-03-05 18:24:51 -0800644 printk(KERN_WARNING "%s: kset create error\n", __func__);
Greg Kroah-Hartman99e0d2f2007-11-02 16:19:59 -0700645 acpi_kobj = NULL;
646 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
Bjorn Helgaas0e465172009-03-24 16:50:09 -0600648 init_acpi_device_notify();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 result = acpi_bus_init();
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100650 if (result) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 disable_acpi();
Bjorn Helgaas81d02732009-03-24 16:49:38 -0600652 return result;
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100653 }
Bjorn Helgaas81d02732009-03-24 16:49:38 -0600654
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100655 pci_mmcfg_late_init();
Bjorn Helgaase747f272009-03-24 16:49:43 -0600656 acpi_scan_init();
Bjorn Helgaasa5f820f2009-03-24 16:49:48 -0600657 acpi_ec_init();
Zhang Ruia25ee922010-07-15 10:46:15 +0800658 acpi_debugfs_init();
Bjorn Helgaas9cee43e2009-03-24 16:50:14 -0600659 acpi_sleep_proc_init();
Bjorn Helgaas201b8c62009-03-24 16:50:19 -0600660 acpi_wakeup_device_init();
Rafael J. Wysocki6831c6e2011-02-15 21:22:24 +0100661 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662}
663
664subsys_initcall(acpi_init);