Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * scan.c - support for transforming the ACPI namespace into individual objects |
| 3 | */ |
| 4 | |
| 5 | #include <linux/module.h> |
| 6 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 7 | #include <linux/slab.h> |
Randy Dunlap | 9b6d97b | 2006-07-12 02:08:00 -0400 | [diff] [blame] | 8 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/acpi.h> |
Alok N Kataria | 74523c9 | 2008-06-13 12:54:24 -0400 | [diff] [blame] | 10 | #include <linux/signal.h> |
| 11 | #include <linux/kthread.h> |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 12 | #include <linux/dmi.h> |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 13 | #include <linux/nls.h> |
Suthikulpanit, Suravee | d056267 | 2015-06-10 11:08:52 -0500 | [diff] [blame] | 14 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 16 | #include <asm/pgtable.h> |
| 17 | |
Bjorn Helgaas | e60cc7a | 2009-03-13 12:08:26 -0600 | [diff] [blame] | 18 | #include "internal.h" |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 21 | ACPI_MODULE_NAME("scan"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 22 | extern struct acpi_device *acpi_root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #define ACPI_BUS_CLASS "system_bus" |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
| 27 | |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
| 29 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 30 | #define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) |
| 31 | |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 32 | /* |
| 33 | * If set, devices will be hot-removed even if they cannot be put offline |
| 34 | * gracefully (from the kernel's standpoint). |
| 35 | */ |
| 36 | bool acpi_force_hot_remove; |
| 37 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 38 | static const char *dummy_hid = "device"; |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 39 | |
Lan Tianyu | 40e7fcb | 2014-11-23 21:22:54 +0800 | [diff] [blame] | 40 | static LIST_HEAD(acpi_dep_list); |
| 41 | static DEFINE_MUTEX(acpi_dep_list_lock); |
Lukas Wunner | 2d12b6b | 2015-11-25 21:19:55 +0100 | [diff] [blame] | 42 | LIST_HEAD(acpi_bus_id_list); |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 43 | static DEFINE_MUTEX(acpi_scan_lock); |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 44 | static LIST_HEAD(acpi_scan_handlers_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 45 | DEFINE_MUTEX(acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | LIST_HEAD(acpi_wakeup_device_list); |
Rafael J. Wysocki | e525506 | 2014-02-04 00:43:17 +0100 | [diff] [blame] | 47 | static DEFINE_MUTEX(acpi_hp_context_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Shannon Zhao | a4e081b | 2016-04-07 20:03:18 +0800 | [diff] [blame] | 49 | /* |
| 50 | * The UART device described by the SPCR table is the only object which needs |
| 51 | * special-casing. Everything else is covered by ACPI namespace paths in STAO |
| 52 | * table. |
| 53 | */ |
| 54 | static u64 spcr_uart_addr; |
| 55 | |
Lan Tianyu | 40e7fcb | 2014-11-23 21:22:54 +0800 | [diff] [blame] | 56 | struct acpi_dep_data { |
| 57 | struct list_head node; |
| 58 | acpi_handle master; |
| 59 | acpi_handle slave; |
| 60 | }; |
| 61 | |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 62 | void acpi_scan_lock_acquire(void) |
| 63 | { |
| 64 | mutex_lock(&acpi_scan_lock); |
| 65 | } |
| 66 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); |
| 67 | |
| 68 | void acpi_scan_lock_release(void) |
| 69 | { |
| 70 | mutex_unlock(&acpi_scan_lock); |
| 71 | } |
| 72 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); |
| 73 | |
Rafael J. Wysocki | e525506 | 2014-02-04 00:43:17 +0100 | [diff] [blame] | 74 | void acpi_lock_hp_context(void) |
| 75 | { |
| 76 | mutex_lock(&acpi_hp_context_lock); |
| 77 | } |
| 78 | |
| 79 | void acpi_unlock_hp_context(void) |
| 80 | { |
| 81 | mutex_unlock(&acpi_hp_context_lock); |
| 82 | } |
| 83 | |
Rafael J. Wysocki | 5d51320 | 2014-02-22 00:48:31 +0100 | [diff] [blame] | 84 | void acpi_initialize_hp_context(struct acpi_device *adev, |
| 85 | struct acpi_hotplug_context *hp, |
| 86 | int (*notify)(struct acpi_device *, u32), |
| 87 | void (*uevent)(struct acpi_device *, u32)) |
| 88 | { |
| 89 | acpi_lock_hp_context(); |
Rafael J. Wysocki | ba574dc | 2014-07-15 22:03:22 +0200 | [diff] [blame] | 90 | hp->notify = notify; |
| 91 | hp->uevent = uevent; |
| 92 | acpi_set_hp_context(adev, hp); |
Rafael J. Wysocki | 5d51320 | 2014-02-22 00:48:31 +0100 | [diff] [blame] | 93 | acpi_unlock_hp_context(); |
| 94 | } |
| 95 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); |
| 96 | |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 97 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
| 98 | { |
Rafael J. Wysocki | d34afa9 | 2014-05-30 04:27:31 +0200 | [diff] [blame] | 99 | if (!handler) |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 100 | return -EINVAL; |
| 101 | |
| 102 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); |
| 103 | return 0; |
| 104 | } |
| 105 | |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 106 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
| 107 | const char *hotplug_profile_name) |
| 108 | { |
| 109 | int error; |
| 110 | |
| 111 | error = acpi_scan_add_handler(handler); |
| 112 | if (error) |
| 113 | return error; |
| 114 | |
| 115 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); |
| 116 | return 0; |
| 117 | } |
| 118 | |
Rafael J. Wysocki | caa73ea | 2013-12-29 15:25:48 +0100 | [diff] [blame] | 119 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 120 | { |
| 121 | struct acpi_device_physical_node *pn; |
| 122 | bool offline = true; |
| 123 | |
Rafael J. Wysocki | 4c533c8 | 2015-04-18 01:25:46 +0200 | [diff] [blame] | 124 | /* |
| 125 | * acpi_container_offline() calls this for all of the container's |
| 126 | * children under the container's physical_node_lock lock. |
| 127 | */ |
| 128 | mutex_lock_nested(&adev->physical_node_lock, SINGLE_DEPTH_NESTING); |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 129 | |
| 130 | list_for_each_entry(pn, &adev->physical_node_list, node) |
| 131 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { |
Rafael J. Wysocki | caa73ea | 2013-12-29 15:25:48 +0100 | [diff] [blame] | 132 | if (uevent) |
| 133 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); |
| 134 | |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 135 | offline = false; |
| 136 | break; |
| 137 | } |
| 138 | |
| 139 | mutex_unlock(&adev->physical_node_lock); |
| 140 | return offline; |
| 141 | } |
| 142 | |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 143 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
| 144 | void **ret_p) |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 145 | { |
| 146 | struct acpi_device *device = NULL; |
| 147 | struct acpi_device_physical_node *pn; |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 148 | bool second_pass = (bool)data; |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 149 | acpi_status status = AE_OK; |
| 150 | |
| 151 | if (acpi_bus_get_device(handle, &device)) |
| 152 | return AE_OK; |
| 153 | |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 154 | if (device->handler && !device->handler->hotplug.enabled) { |
| 155 | *ret_p = &device->dev; |
| 156 | return AE_SUPPORT; |
| 157 | } |
| 158 | |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 159 | mutex_lock(&device->physical_node_lock); |
| 160 | |
| 161 | list_for_each_entry(pn, &device->physical_node_list, node) { |
| 162 | int ret; |
| 163 | |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 164 | if (second_pass) { |
| 165 | /* Skip devices offlined by the first pass. */ |
| 166 | if (pn->put_online) |
| 167 | continue; |
| 168 | } else { |
| 169 | pn->put_online = false; |
| 170 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 171 | ret = device_offline(pn->dev); |
| 172 | if (acpi_force_hot_remove) |
| 173 | continue; |
| 174 | |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 175 | if (ret >= 0) { |
| 176 | pn->put_online = !ret; |
| 177 | } else { |
| 178 | *ret_p = pn->dev; |
| 179 | if (second_pass) { |
| 180 | status = AE_ERROR; |
| 181 | break; |
| 182 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 183 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | mutex_unlock(&device->physical_node_lock); |
| 187 | |
| 188 | return status; |
| 189 | } |
| 190 | |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 191 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
| 192 | void **ret_p) |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 193 | { |
| 194 | struct acpi_device *device = NULL; |
| 195 | struct acpi_device_physical_node *pn; |
| 196 | |
| 197 | if (acpi_bus_get_device(handle, &device)) |
| 198 | return AE_OK; |
| 199 | |
| 200 | mutex_lock(&device->physical_node_lock); |
| 201 | |
| 202 | list_for_each_entry(pn, &device->physical_node_list, node) |
| 203 | if (pn->put_online) { |
| 204 | device_online(pn->dev); |
| 205 | pn->put_online = false; |
| 206 | } |
| 207 | |
| 208 | mutex_unlock(&device->physical_node_lock); |
| 209 | |
| 210 | return AE_OK; |
| 211 | } |
| 212 | |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 213 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { |
Yinghai Lu | 5993c46 | 2013-01-11 22:40:41 +0000 | [diff] [blame] | 215 | acpi_handle handle = device->handle; |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 216 | struct device *errdev = NULL; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 217 | acpi_status status; |
Rafael J. Wysocki | f058cdf | 2013-02-09 15:29:11 +0100 | [diff] [blame] | 218 | |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 219 | /* |
| 220 | * Carry out two passes here and ignore errors in the first pass, |
| 221 | * because if the devices in question are memory blocks and |
| 222 | * CONFIG_MEMCG is set, one of the blocks may hold data structures |
| 223 | * that the other blocks depend on, but it is not known in advance which |
| 224 | * block holds them. |
| 225 | * |
| 226 | * If the first pass is successful, the second one isn't needed, though. |
| 227 | */ |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 228 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
| 229 | NULL, acpi_bus_offline, (void *)false, |
| 230 | (void **)&errdev); |
| 231 | if (status == AE_SUPPORT) { |
| 232 | dev_warn(errdev, "Offline disabled.\n"); |
| 233 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
| 234 | acpi_bus_online, NULL, NULL, NULL); |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 235 | return -EPERM; |
| 236 | } |
| 237 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 238 | if (errdev) { |
| 239 | errdev = NULL; |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 240 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 241 | NULL, acpi_bus_offline, (void *)true, |
| 242 | (void **)&errdev); |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 243 | if (!errdev || acpi_force_hot_remove) |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 244 | acpi_bus_offline(handle, 0, (void *)true, |
| 245 | (void **)&errdev); |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 246 | |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 247 | if (errdev && !acpi_force_hot_remove) { |
| 248 | dev_warn(errdev, "Offline failed.\n"); |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 249 | acpi_bus_online(handle, 0, NULL, NULL); |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 250 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 251 | ACPI_UINT32_MAX, acpi_bus_online, |
| 252 | NULL, NULL, NULL); |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 253 | return -EBUSY; |
| 254 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 255 | } |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | static int acpi_scan_hot_remove(struct acpi_device *device) |
| 260 | { |
| 261 | acpi_handle handle = device->handle; |
| 262 | unsigned long long sta; |
| 263 | acpi_status status; |
| 264 | |
Tang Chen | dee1592 | 2014-08-08 10:30:45 +0800 | [diff] [blame] | 265 | if (device->handler && device->handler->hotplug.demand_offline |
| 266 | && !acpi_force_hot_remove) { |
Rafael J. Wysocki | caa73ea | 2013-12-29 15:25:48 +0100 | [diff] [blame] | 267 | if (!acpi_scan_is_offline(device, true)) |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 268 | return -EBUSY; |
| 269 | } else { |
| 270 | int error = acpi_scan_try_to_offline(device); |
| 271 | if (error) |
| 272 | return error; |
| 273 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 274 | |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 275 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 276 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 277 | |
Rafael J. Wysocki | bfee26d | 2013-01-26 00:27:44 +0100 | [diff] [blame] | 278 | acpi_bus_trim(device); |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 279 | |
Jiang Liu | 7d2421f | 2013-06-29 00:24:40 +0800 | [diff] [blame] | 280 | acpi_evaluate_lck(handle, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | /* |
| 282 | * TBD: _EJD support. |
| 283 | */ |
Jiang Liu | 7d2421f | 2013-06-29 00:24:40 +0800 | [diff] [blame] | 284 | status = acpi_evaluate_ej0(handle); |
| 285 | if (status == AE_NOT_FOUND) |
| 286 | return -ENODEV; |
| 287 | else if (ACPI_FAILURE(status)) |
| 288 | return -EIO; |
Rafael J. Wysocki | f058cdf | 2013-02-09 15:29:11 +0100 | [diff] [blame] | 289 | |
Toshi Kani | 882fd12 | 2013-03-13 19:29:26 +0000 | [diff] [blame] | 290 | /* |
| 291 | * Verify if eject was indeed successful. If not, log an error |
| 292 | * message. No need to call _OST since _EJ0 call was made OK. |
| 293 | */ |
| 294 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
| 295 | if (ACPI_FAILURE(status)) { |
| 296 | acpi_handle_warn(handle, |
| 297 | "Status check after eject failed (0x%x)\n", status); |
| 298 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { |
| 299 | acpi_handle_warn(handle, |
| 300 | "Eject incomplete - status 0x%llx\n", sta); |
| 301 | } |
| 302 | |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 303 | return 0; |
| 304 | } |
Rafael J. Wysocki | f058cdf | 2013-02-09 15:29:11 +0100 | [diff] [blame] | 305 | |
Rafael J. Wysocki | 443fc82 | 2013-11-22 21:55:43 +0100 | [diff] [blame] | 306 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
| 307 | { |
| 308 | if (!acpi_device_enumerated(adev)) { |
| 309 | dev_warn(&adev->dev, "Still not present\n"); |
| 310 | return -EALREADY; |
| 311 | } |
| 312 | acpi_bus_trim(adev); |
| 313 | return 0; |
| 314 | } |
| 315 | |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 316 | static int acpi_scan_device_check(struct acpi_device *adev) |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 317 | { |
Rafael J. Wysocki | f943db4 | 2013-08-28 21:41:07 +0200 | [diff] [blame] | 318 | int error; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 319 | |
Rafael J. Wysocki | 443fc82 | 2013-11-22 21:55:43 +0100 | [diff] [blame] | 320 | acpi_bus_get_status(adev); |
| 321 | if (adev->status.present || adev->status.functional) { |
| 322 | /* |
| 323 | * This function is only called for device objects for which |
| 324 | * matching scan handlers exist. The only situation in which |
| 325 | * the scan handler is not attached to this device object yet |
| 326 | * is when the device has just appeared (either it wasn't |
| 327 | * present at all before or it was removed and then added |
| 328 | * again). |
| 329 | */ |
| 330 | if (adev->handler) { |
| 331 | dev_warn(&adev->dev, "Already enumerated\n"); |
| 332 | return -EALREADY; |
| 333 | } |
| 334 | error = acpi_bus_scan(adev->handle); |
| 335 | if (error) { |
| 336 | dev_warn(&adev->dev, "Namespace scan failure\n"); |
| 337 | return error; |
| 338 | } |
| 339 | if (!adev->handler) { |
| 340 | dev_warn(&adev->dev, "Enumeration failure\n"); |
| 341 | error = -ENODEV; |
| 342 | } |
| 343 | } else { |
| 344 | error = acpi_scan_device_not_present(adev); |
| 345 | } |
| 346 | return error; |
| 347 | } |
| 348 | |
| 349 | static int acpi_scan_bus_check(struct acpi_device *adev) |
| 350 | { |
| 351 | struct acpi_scan_handler *handler = adev->handler; |
| 352 | struct acpi_device *child; |
| 353 | int error; |
| 354 | |
| 355 | acpi_bus_get_status(adev); |
| 356 | if (!(adev->status.present || adev->status.functional)) { |
| 357 | acpi_scan_device_not_present(adev); |
| 358 | return 0; |
| 359 | } |
| 360 | if (handler && handler->hotplug.scan_dependent) |
| 361 | return handler->hotplug.scan_dependent(adev); |
| 362 | |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 363 | error = acpi_bus_scan(adev->handle); |
| 364 | if (error) { |
| 365 | dev_warn(&adev->dev, "Namespace scan failure\n"); |
| 366 | return error; |
| 367 | } |
Rafael J. Wysocki | 443fc82 | 2013-11-22 21:55:43 +0100 | [diff] [blame] | 368 | list_for_each_entry(child, &adev->children, node) { |
| 369 | error = acpi_scan_bus_check(child); |
| 370 | if (error) |
| 371 | return error; |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 372 | } |
| 373 | return 0; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 374 | } |
| 375 | |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 376 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
| 377 | { |
| 378 | switch (type) { |
| 379 | case ACPI_NOTIFY_BUS_CHECK: |
| 380 | return acpi_scan_bus_check(adev); |
| 381 | case ACPI_NOTIFY_DEVICE_CHECK: |
| 382 | return acpi_scan_device_check(adev); |
| 383 | case ACPI_NOTIFY_EJECT_REQUEST: |
| 384 | case ACPI_OST_EC_OSPM_EJECT: |
Rafael J. Wysocki | dd2151b | 2014-02-04 00:44:02 +0100 | [diff] [blame] | 385 | if (adev->handler && !adev->handler->hotplug.enabled) { |
| 386 | dev_info(&adev->dev, "Eject disabled\n"); |
| 387 | return -EPERM; |
| 388 | } |
Rafael J. Wysocki | 700b842 | 2014-02-21 01:07:17 +0100 | [diff] [blame] | 389 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
| 390 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 391 | return acpi_scan_hot_remove(adev); |
| 392 | } |
| 393 | return -EINVAL; |
| 394 | } |
| 395 | |
Rafael J. Wysocki | 1e3bcb5 | 2014-03-03 00:40:38 +0100 | [diff] [blame] | 396 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 397 | { |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 398 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 399 | int error = -ENODEV; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 400 | |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 401 | lock_device_hotplug(); |
Rafael J. Wysocki | e0ae8fe | 2013-08-30 14:19:29 +0200 | [diff] [blame] | 402 | mutex_lock(&acpi_scan_lock); |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 403 | |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 404 | /* |
| 405 | * The device object's ACPI handle cannot become invalid as long as we |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 406 | * are holding acpi_scan_lock, but it might have become invalid before |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 407 | * that lock was acquired. |
| 408 | */ |
| 409 | if (adev->handle == INVALID_ACPI_HANDLE) |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 410 | goto err_out; |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 411 | |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 412 | if (adev->flags.is_dock_station) { |
| 413 | error = dock_notify(adev, src); |
| 414 | } else if (adev->flags.hotplug_notify) { |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 415 | error = acpi_generic_hotplug_event(adev, src); |
Rafael J. Wysocki | dd2151b | 2014-02-04 00:44:02 +0100 | [diff] [blame] | 416 | if (error == -EPERM) { |
| 417 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; |
| 418 | goto err_out; |
| 419 | } |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 420 | } else { |
Rafael J. Wysocki | be27b3d | 2014-02-21 01:10:27 +0100 | [diff] [blame] | 421 | int (*notify)(struct acpi_device *, u32); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 422 | |
| 423 | acpi_lock_hp_context(); |
Rafael J. Wysocki | be27b3d | 2014-02-21 01:10:27 +0100 | [diff] [blame] | 424 | notify = adev->hp ? adev->hp->notify : NULL; |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 425 | acpi_unlock_hp_context(); |
| 426 | /* |
| 427 | * There may be additional notify handlers for device objects |
| 428 | * without the .event() callback, so ignore them here. |
| 429 | */ |
Rafael J. Wysocki | be27b3d | 2014-02-21 01:10:27 +0100 | [diff] [blame] | 430 | if (notify) |
| 431 | error = notify(adev, src); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 432 | else |
| 433 | goto out; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 434 | } |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 435 | if (!error) |
| 436 | ost_code = ACPI_OST_SC_SUCCESS; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 437 | |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 438 | err_out: |
Rafael J. Wysocki | 700b842 | 2014-02-21 01:07:17 +0100 | [diff] [blame] | 439 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 440 | |
| 441 | out: |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 442 | acpi_bus_put_acpi_device(adev); |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 443 | mutex_unlock(&acpi_scan_lock); |
Rafael J. Wysocki | e0ae8fe | 2013-08-30 14:19:29 +0200 | [diff] [blame] | 444 | unlock_device_hotplug(); |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 445 | } |
| 446 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 447 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
| 448 | { |
| 449 | int i; |
| 450 | |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 451 | if (device->wakeup.flags.valid) |
| 452 | acpi_power_resources_list_free(&device->wakeup.resources); |
| 453 | |
Rafael J. Wysocki | 1b1f3e1 | 2015-01-01 23:38:28 +0100 | [diff] [blame] | 454 | if (!device->power.flags.power_resources) |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 455 | return; |
| 456 | |
| 457 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
| 458 | struct acpi_device_power_state *ps = &device->power.states[i]; |
| 459 | acpi_power_resources_list_free(&ps->resources); |
| 460 | } |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 461 | } |
| 462 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 463 | static void acpi_device_release(struct device *dev) |
| 464 | { |
| 465 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 466 | |
Mika Westerberg | ffdcd95 | 2014-10-21 13:33:55 +0200 | [diff] [blame] | 467 | acpi_free_properties(acpi_dev); |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 468 | acpi_free_pnp_ids(&acpi_dev->pnp); |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 469 | acpi_free_power_resources_lists(acpi_dev); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 470 | kfree(acpi_dev); |
| 471 | } |
| 472 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 473 | static void acpi_device_del(struct acpi_device *device) |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 474 | { |
Lukas Wunner | ca9dc8d | 2015-11-25 21:19:55 +0100 | [diff] [blame] | 475 | struct acpi_device_bus_id *acpi_device_bus_id; |
| 476 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 477 | mutex_lock(&acpi_device_lock); |
| 478 | if (device->parent) |
| 479 | list_del(&device->node); |
| 480 | |
Lukas Wunner | ca9dc8d | 2015-11-25 21:19:55 +0100 | [diff] [blame] | 481 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) |
| 482 | if (!strcmp(acpi_device_bus_id->bus_id, |
| 483 | acpi_device_hid(device))) { |
| 484 | if (acpi_device_bus_id->instance_no > 0) |
| 485 | acpi_device_bus_id->instance_no--; |
| 486 | else { |
| 487 | list_del(&acpi_device_bus_id->node); |
| 488 | kfree(acpi_device_bus_id); |
| 489 | } |
| 490 | break; |
| 491 | } |
| 492 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 493 | list_del(&device->wakeup_list); |
| 494 | mutex_unlock(&acpi_device_lock); |
| 495 | |
| 496 | acpi_power_add_remove_device(device, false); |
| 497 | acpi_device_remove_files(device); |
| 498 | if (device->remove) |
| 499 | device->remove(device); |
| 500 | |
| 501 | device_del(&device->dev); |
| 502 | } |
| 503 | |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 504 | static BLOCKING_NOTIFIER_HEAD(acpi_reconfig_chain); |
| 505 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 506 | static LIST_HEAD(acpi_device_del_list); |
| 507 | static DEFINE_MUTEX(acpi_device_del_lock); |
| 508 | |
| 509 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) |
| 510 | { |
| 511 | for (;;) { |
| 512 | struct acpi_device *adev; |
| 513 | |
| 514 | mutex_lock(&acpi_device_del_lock); |
| 515 | |
| 516 | if (list_empty(&acpi_device_del_list)) { |
| 517 | mutex_unlock(&acpi_device_del_lock); |
| 518 | break; |
| 519 | } |
| 520 | adev = list_first_entry(&acpi_device_del_list, |
| 521 | struct acpi_device, del_list); |
| 522 | list_del(&adev->del_list); |
| 523 | |
| 524 | mutex_unlock(&acpi_device_del_lock); |
| 525 | |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 526 | blocking_notifier_call_chain(&acpi_reconfig_chain, |
| 527 | ACPI_RECONFIG_DEVICE_REMOVE, adev); |
| 528 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 529 | acpi_device_del(adev); |
| 530 | /* |
| 531 | * Drop references to all power resources that might have been |
| 532 | * used by the device. |
| 533 | */ |
| 534 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); |
| 535 | put_device(&adev->dev); |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * acpi_scan_drop_device - Drop an ACPI device object. |
| 541 | * @handle: Handle of an ACPI namespace node, not used. |
| 542 | * @context: Address of the ACPI device object to drop. |
| 543 | * |
| 544 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI |
| 545 | * namespace node the device object pointed to by @context is attached to. |
| 546 | * |
| 547 | * The unregistration is carried out asynchronously to avoid running |
| 548 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to |
| 549 | * ensure the correct ordering (the device objects must be unregistered in the |
| 550 | * same order in which the corresponding namespace nodes are deleted). |
| 551 | */ |
| 552 | static void acpi_scan_drop_device(acpi_handle handle, void *context) |
| 553 | { |
| 554 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
| 555 | struct acpi_device *adev = context; |
| 556 | |
| 557 | mutex_lock(&acpi_device_del_lock); |
| 558 | |
| 559 | /* |
| 560 | * Use the ACPI hotplug workqueue which is ordered, so this work item |
| 561 | * won't run after any hotplug work items submitted subsequently. That |
| 562 | * prevents attempts to register device objects identical to those being |
| 563 | * deleted from happening concurrently (such attempts result from |
| 564 | * hotplug events handled via the ACPI hotplug workqueue). It also will |
| 565 | * run after all of the work items submitted previosuly, which helps |
| 566 | * those work items to ensure that they are not accessing stale device |
| 567 | * objects. |
| 568 | */ |
| 569 | if (list_empty(&acpi_device_del_list)) |
| 570 | acpi_queue_hotplug_work(&work); |
| 571 | |
| 572 | list_add_tail(&adev->del_list, &acpi_device_del_list); |
| 573 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ |
| 574 | adev->handle = INVALID_ACPI_HANDLE; |
| 575 | |
| 576 | mutex_unlock(&acpi_device_del_lock); |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 577 | } |
| 578 | |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 579 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
| 580 | void (*callback)(void *)) |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 581 | { |
| 582 | acpi_status status; |
| 583 | |
| 584 | if (!device) |
| 585 | return -EINVAL; |
| 586 | |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 587 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
| 588 | (void **)device, callback); |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 589 | if (ACPI_FAILURE(status) || !*device) { |
| 590 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 591 | handle)); |
| 592 | return -ENODEV; |
| 593 | } |
| 594 | return 0; |
| 595 | } |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 596 | |
| 597 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
| 598 | { |
| 599 | return acpi_get_device_data(handle, device, NULL); |
| 600 | } |
Rafael J. Wysocki | 6585925 | 2013-10-01 23:02:43 +0200 | [diff] [blame] | 601 | EXPORT_SYMBOL(acpi_bus_get_device); |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 602 | |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 603 | static void get_acpi_device(void *dev) |
| 604 | { |
| 605 | if (dev) |
| 606 | get_device(&((struct acpi_device *)dev)->dev); |
| 607 | } |
| 608 | |
| 609 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) |
| 610 | { |
| 611 | struct acpi_device *adev = NULL; |
| 612 | |
| 613 | acpi_get_device_data(handle, &adev, get_acpi_device); |
| 614 | return adev; |
| 615 | } |
| 616 | |
| 617 | void acpi_bus_put_acpi_device(struct acpi_device *adev) |
| 618 | { |
| 619 | put_device(&adev->dev); |
| 620 | } |
| 621 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 622 | int acpi_device_add(struct acpi_device *device, |
| 623 | void (*release)(struct device *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 625 | int result; |
| 626 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
| 627 | int found = 0; |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 628 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 629 | if (device->handle) { |
| 630 | acpi_status status; |
| 631 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 632 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 633 | device); |
| 634 | if (ACPI_FAILURE(status)) { |
| 635 | acpi_handle_err(device->handle, |
| 636 | "Unable to attach device data\n"); |
| 637 | return -ENODEV; |
| 638 | } |
| 639 | } |
| 640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | /* |
| 642 | * Linkage |
| 643 | * ------- |
| 644 | * Link this device to its parent and siblings. |
| 645 | */ |
| 646 | INIT_LIST_HEAD(&device->children); |
| 647 | INIT_LIST_HEAD(&device->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | INIT_LIST_HEAD(&device->wakeup_list); |
Lan Tianyu | 1033f90 | 2012-08-17 14:44:09 +0800 | [diff] [blame] | 649 | INIT_LIST_HEAD(&device->physical_node_list); |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 650 | INIT_LIST_HEAD(&device->del_list); |
Lan Tianyu | 1033f90 | 2012-08-17 14:44:09 +0800 | [diff] [blame] | 651 | mutex_init(&device->physical_node_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 653 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
| 654 | if (!new_bus_id) { |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 655 | pr_err(PREFIX "Memory allocation error\n"); |
| 656 | result = -ENOMEM; |
| 657 | goto err_detach; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 658 | } |
| 659 | |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 660 | mutex_lock(&acpi_device_lock); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 661 | /* |
| 662 | * Find suitable bus_id and instance number in acpi_bus_id_list |
| 663 | * If failed, create one and link it into acpi_bus_id_list |
| 664 | */ |
| 665 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 666 | if (!strcmp(acpi_device_bus_id->bus_id, |
| 667 | acpi_device_hid(device))) { |
| 668 | acpi_device_bus_id->instance_no++; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 669 | found = 1; |
| 670 | kfree(new_bus_id); |
| 671 | break; |
| 672 | } |
| 673 | } |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 674 | if (!found) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 675 | acpi_device_bus_id = new_bus_id; |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 676 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 677 | acpi_device_bus_id->instance_no = 0; |
| 678 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); |
| 679 | } |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 680 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 681 | |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 682 | if (device->parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | list_add_tail(&device->node, &device->parent->children); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | if (device->wakeup.flags.valid) |
| 686 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 687 | mutex_unlock(&acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 689 | if (device->parent) |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 690 | device->dev.parent = &device->parent->dev; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 691 | device->dev.bus = &acpi_bus_type; |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 692 | device->dev.release = release; |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 693 | result = device_add(&device->dev); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 694 | if (result) { |
Alex Chiang | 8b12b92 | 2009-05-14 08:31:32 -0600 | [diff] [blame] | 695 | dev_err(&device->dev, "Error registering device\n"); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 696 | goto err; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 697 | } |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 698 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 699 | result = acpi_device_setup_files(device); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 700 | if (result) |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 701 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
| 702 | dev_name(&device->dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 703 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 704 | return 0; |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 705 | |
| 706 | err: |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 707 | mutex_lock(&acpi_device_lock); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 708 | if (device->parent) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 709 | list_del(&device->node); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 710 | list_del(&device->wakeup_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 711 | mutex_unlock(&acpi_device_lock); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 712 | |
| 713 | err_detach: |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 714 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 715 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | } |
| 717 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 718 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | Device Enumeration |
| 720 | -------------------------------------------------------------------------- */ |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 721 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
| 722 | { |
Rafael J. Wysocki | 456de89 | 2013-01-31 20:57:40 +0100 | [diff] [blame] | 723 | struct acpi_device *device = NULL; |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 724 | acpi_status status; |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 725 | |
| 726 | /* |
| 727 | * Fixed hardware devices do not appear in the namespace and do not |
| 728 | * have handles, but we fabricate acpi_devices for them, so we have |
| 729 | * to deal with them specially. |
| 730 | */ |
Rafael J. Wysocki | 456de89 | 2013-01-31 20:57:40 +0100 | [diff] [blame] | 731 | if (!handle) |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 732 | return acpi_root; |
| 733 | |
| 734 | do { |
| 735 | status = acpi_get_parent(handle, &handle); |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 736 | if (ACPI_FAILURE(status)) |
Rafael J. Wysocki | 456de89 | 2013-01-31 20:57:40 +0100 | [diff] [blame] | 737 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
| 738 | } while (acpi_bus_get_device(handle, &device)); |
| 739 | return device; |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 740 | } |
| 741 | |
Len Brown | c8f7a62c | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 742 | acpi_status |
| 743 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) |
| 744 | { |
| 745 | acpi_status status; |
| 746 | acpi_handle tmp; |
| 747 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 748 | union acpi_object *obj; |
| 749 | |
| 750 | status = acpi_get_handle(handle, "_EJD", &tmp); |
| 751 | if (ACPI_FAILURE(status)) |
| 752 | return status; |
| 753 | |
| 754 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); |
| 755 | if (ACPI_SUCCESS(status)) { |
| 756 | obj = buffer.pointer; |
Holger Macht | 3b5fee5 | 2008-02-14 13:40:34 +0100 | [diff] [blame] | 757 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
| 758 | ejd); |
Len Brown | c8f7a62c | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 759 | kfree(buffer.pointer); |
| 760 | } |
| 761 | return status; |
| 762 | } |
| 763 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); |
| 764 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 765 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
| 766 | struct acpi_device_wakeup *wakeup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 768 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 769 | union acpi_object *package = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | union acpi_object *element = NULL; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 771 | acpi_status status; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 772 | int err = -ENODATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 774 | if (!wakeup) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 775 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 777 | INIT_LIST_HEAD(&wakeup->resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 779 | /* _PRW */ |
| 780 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); |
| 781 | if (ACPI_FAILURE(status)) { |
| 782 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 783 | return err; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 784 | } |
| 785 | |
| 786 | package = (union acpi_object *)buffer.pointer; |
| 787 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 788 | if (!package || package->package.count < 2) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 789 | goto out; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | element = &(package->package.elements[0]); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 792 | if (!element) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 793 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | if (element->type == ACPI_TYPE_PACKAGE) { |
| 796 | if ((element->package.count < 2) || |
| 797 | (element->package.elements[0].type != |
| 798 | ACPI_TYPE_LOCAL_REFERENCE) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 799 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 800 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 801 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 802 | wakeup->gpe_device = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | element->package.elements[0].reference.handle; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 804 | wakeup->gpe_number = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | (u32) element->package.elements[1].integer.value; |
| 806 | } else if (element->type == ACPI_TYPE_INTEGER) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 807 | wakeup->gpe_device = NULL; |
| 808 | wakeup->gpe_number = element->integer.value; |
| 809 | } else { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 810 | goto out; |
| 811 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | |
| 813 | element = &(package->package.elements[1]); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 814 | if (element->type != ACPI_TYPE_INTEGER) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 815 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 816 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 817 | wakeup->sleep_state = element->integer.value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 819 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
| 820 | if (err) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 821 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 823 | if (!list_empty(&wakeup->resources)) { |
| 824 | int sleep_state; |
| 825 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 826 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
| 827 | &sleep_state); |
| 828 | if (err) { |
| 829 | acpi_handle_warn(handle, "Retrieving current states " |
| 830 | "of wakeup power resources failed\n"); |
| 831 | acpi_power_resources_list_free(&wakeup->resources); |
| 832 | goto out; |
| 833 | } |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 834 | if (sleep_state < wakeup->sleep_state) { |
| 835 | acpi_handle_warn(handle, "Overriding _PRW sleep state " |
| 836 | "(S%d) by S%d from power resources\n", |
| 837 | (int)wakeup->sleep_state, sleep_state); |
| 838 | wakeup->sleep_state = sleep_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | } |
Rafael J. Wysocki | 9874647 | 2010-07-08 00:43:36 +0200 | [diff] [blame] | 841 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 842 | out: |
| 843 | kfree(buffer.pointer); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 844 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | } |
| 846 | |
Rafael J. Wysocki | bd9b2f9 | 2014-07-14 22:41:41 +0200 | [diff] [blame] | 847 | static void acpi_wakeup_gpe_init(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | { |
Mathias Krause | 0519ade | 2015-06-13 14:26:58 +0200 | [diff] [blame] | 849 | static const struct acpi_device_id button_device_ids[] = { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 850 | {"PNP0C0C", 0}, |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 851 | {"PNP0C0D", 0}, |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 852 | {"PNP0C0E", 0}, |
| 853 | {"", 0}, |
| 854 | }; |
Rafael J. Wysocki | bd9b2f9 | 2014-07-14 22:41:41 +0200 | [diff] [blame] | 855 | struct acpi_device_wakeup *wakeup = &device->wakeup; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 856 | acpi_status status; |
| 857 | acpi_event_status event_status; |
| 858 | |
Rafael J. Wysocki | bd9b2f9 | 2014-07-14 22:41:41 +0200 | [diff] [blame] | 859 | wakeup->flags.notifier_present = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 860 | |
| 861 | /* Power button, Lid switch always enable wakeup */ |
| 862 | if (!acpi_match_device_ids(device, button_device_ids)) { |
Rafael J. Wysocki | bd9b2f9 | 2014-07-14 22:41:41 +0200 | [diff] [blame] | 863 | wakeup->flags.run_wake = 1; |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 864 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
| 865 | /* Do not use Lid/sleep button for S5 wakeup */ |
Rafael J. Wysocki | bd9b2f9 | 2014-07-14 22:41:41 +0200 | [diff] [blame] | 866 | if (wakeup->sleep_state == ACPI_STATE_S5) |
| 867 | wakeup->sleep_state = ACPI_STATE_S4; |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 868 | } |
Rafael J. Wysocki | bd9b2f9 | 2014-07-14 22:41:41 +0200 | [diff] [blame] | 869 | acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number); |
Rafael J. Wysocki | f2b56bc | 2011-01-06 23:34:22 +0100 | [diff] [blame] | 870 | device_set_wakeup_capable(&device->dev, true); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 871 | return; |
| 872 | } |
| 873 | |
Rafael J. Wysocki | bd9b2f9 | 2014-07-14 22:41:41 +0200 | [diff] [blame] | 874 | acpi_setup_gpe_for_wake(device->handle, wakeup->gpe_device, |
| 875 | wakeup->gpe_number); |
| 876 | status = acpi_get_gpe_status(wakeup->gpe_device, wakeup->gpe_number, |
| 877 | &event_status); |
| 878 | if (ACPI_FAILURE(status)) |
| 879 | return; |
| 880 | |
Lv Zheng | 2f85723 | 2014-10-10 10:40:05 +0800 | [diff] [blame] | 881 | wakeup->flags.run_wake = !!(event_status & ACPI_EVENT_FLAG_HAS_HANDLER); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 882 | } |
| 883 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 884 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 885 | { |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 886 | int err; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 887 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 888 | /* Presence of _PRW indicates wake capable */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 889 | if (!acpi_has_method(device->handle, "_PRW")) |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 890 | return; |
| 891 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 892 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
| 893 | &device->wakeup); |
| 894 | if (err) { |
| 895 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 896 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | } |
| 898 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | device->wakeup.flags.valid = 1; |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 900 | device->wakeup.prepare_count = 0; |
Rafael J. Wysocki | bd9b2f9 | 2014-07-14 22:41:41 +0200 | [diff] [blame] | 901 | acpi_wakeup_gpe_init(device); |
Zhao Yakui | 729b2bd | 2008-03-19 13:26:54 +0800 | [diff] [blame] | 902 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
| 903 | * system for the ACPI device with the _PRW object. |
| 904 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. |
| 905 | * So it is necessary to call _DSW object first. Only when it is not |
| 906 | * present will the _PSW object used. |
| 907 | */ |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 908 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
| 909 | if (err) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 910 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 911 | "error in _DSW or _PSW evaluation\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | } |
| 913 | |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 914 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 916 | struct acpi_device_power_state *ps = &device->power.states[state]; |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 917 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
| 918 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 919 | acpi_status status; |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 920 | |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 921 | INIT_LIST_HEAD(&ps->resources); |
| 922 | |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 923 | /* Evaluate "_PRx" to get referenced power resources */ |
| 924 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); |
| 925 | if (ACPI_SUCCESS(status)) { |
| 926 | union acpi_object *package = buffer.pointer; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 927 | |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 928 | if (buffer.length && package |
| 929 | && package->type == ACPI_TYPE_PACKAGE |
| 930 | && package->package.count) { |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 931 | int err = acpi_extract_power_resources(package, 0, |
| 932 | &ps->resources); |
| 933 | if (!err) |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 934 | device->power.flags.power_resources = 1; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 935 | } |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 936 | ACPI_FREE(buffer.pointer); |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 940 | pathname[2] = 'S'; |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 941 | if (acpi_has_method(device->handle, pathname)) |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 942 | ps->flags.explicit_set = 1; |
| 943 | |
Rafael J. Wysocki | 20dacb7 | 2015-05-16 01:55:35 +0200 | [diff] [blame] | 944 | /* State is valid if there are means to put the device into it. */ |
| 945 | if (!list_empty(&ps->resources) || ps->flags.explicit_set) |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 946 | ps->flags.valid = 1; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 947 | |
| 948 | ps->power = -1; /* Unknown - driver assigned */ |
| 949 | ps->latency = -1; /* Unknown - driver assigned */ |
| 950 | } |
| 951 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 952 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | { |
Rafael J. Wysocki | 8bc5053 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 954 | u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 956 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 957 | if (!acpi_has_method(device->handle, "_PS0") && |
| 958 | !acpi_has_method(device->handle, "_PR0")) |
| 959 | return; |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 960 | |
| 961 | device->flags.power_manageable = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
| 963 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 964 | * Power Management Flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 966 | if (acpi_has_method(device->handle, "_PSC")) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 967 | device->power.flags.explicit_get = 1; |
Rafael J. Wysocki | f25c0ae | 2014-05-17 00:18:13 +0200 | [diff] [blame] | 968 | |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 969 | if (acpi_has_method(device->handle, "_IRC")) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 970 | device->power.flags.inrush_current = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
Rafael J. Wysocki | f25c0ae | 2014-05-17 00:18:13 +0200 | [diff] [blame] | 972 | if (acpi_has_method(device->handle, "_DSW")) |
| 973 | device->power.flags.dsw_present = 1; |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 976 | * Enumerate supported power management states |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | */ |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 978 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
| 979 | acpi_bus_init_power_state(device, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 981 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
Rafael J. Wysocki | 20dacb7 | 2015-05-16 01:55:35 +0200 | [diff] [blame] | 982 | if (!list_empty(&device->power.states[ACPI_STATE_D3_HOT].resources)) |
| 983 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | |
Rafael J. Wysocki | 20dacb7 | 2015-05-16 01:55:35 +0200 | [diff] [blame] | 985 | /* Set defaults for D0 and D3hot states (always valid) */ |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 986 | device->power.states[ACPI_STATE_D0].flags.valid = 1; |
| 987 | device->power.states[ACPI_STATE_D0].power = 100; |
Rafael J. Wysocki | 20dacb7 | 2015-05-16 01:55:35 +0200 | [diff] [blame] | 988 | device->power.states[ACPI_STATE_D3_HOT].flags.valid = 1; |
Aaron Lu | 1399dfc | 2012-11-21 23:33:40 +0100 | [diff] [blame] | 989 | |
Rafael J. Wysocki | 1b1f3e1 | 2015-01-01 23:38:28 +0100 | [diff] [blame] | 990 | if (acpi_bus_init_power(device)) |
Rafael J. Wysocki | b378549 | 2013-02-01 23:43:02 +0100 | [diff] [blame] | 991 | device->flags.power_manageable = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | } |
| 993 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 994 | static void acpi_bus_get_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | /* Presence of _STA indicates 'dynamic_status' */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 997 | if (acpi_has_method(device->handle, "_STA")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | device->flags.dynamic_status = 1; |
| 999 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | /* Presence of _RMV indicates 'removable' */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1001 | if (acpi_has_method(device->handle, "_RMV")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | device->flags.removable = 1; |
| 1003 | |
| 1004 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1005 | if (acpi_has_method(device->handle, "_EJD") || |
| 1006 | acpi_has_method(device->handle, "_EJ0")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | device->flags.ejectable = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | } |
| 1009 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1010 | static void acpi_device_get_busid(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1012 | char bus_id[5] = { '?', 0 }; |
| 1013 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; |
| 1014 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
| 1016 | /* |
| 1017 | * Bus ID |
| 1018 | * ------ |
| 1019 | * The device's Bus ID is simply the object name. |
| 1020 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? |
| 1021 | */ |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1022 | if (ACPI_IS_ROOT_DEVICE(device)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | strcpy(device->pnp.bus_id, "ACPI"); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1024 | return; |
| 1025 | } |
| 1026 | |
| 1027 | switch (device->device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | case ACPI_BUS_TYPE_POWER_BUTTON: |
| 1029 | strcpy(device->pnp.bus_id, "PWRF"); |
| 1030 | break; |
| 1031 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
| 1032 | strcpy(device->pnp.bus_id, "SLPF"); |
| 1033 | break; |
| 1034 | default: |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1035 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | /* Clean up trailing underscores (if any) */ |
| 1037 | for (i = 3; i > 1; i--) { |
| 1038 | if (bus_id[i] == '_') |
| 1039 | bus_id[i] = '\0'; |
| 1040 | else |
| 1041 | break; |
| 1042 | } |
| 1043 | strcpy(device->pnp.bus_id, bus_id); |
| 1044 | break; |
| 1045 | } |
| 1046 | } |
| 1047 | |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1048 | /* |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1049 | * acpi_ata_match - see if an acpi object is an ATA device |
| 1050 | * |
| 1051 | * If an acpi object has one of the ACPI ATA methods defined, |
| 1052 | * then we can safely call it an ATA device. |
| 1053 | */ |
| 1054 | bool acpi_ata_match(acpi_handle handle) |
| 1055 | { |
| 1056 | return acpi_has_method(handle, "_GTF") || |
| 1057 | acpi_has_method(handle, "_GTM") || |
| 1058 | acpi_has_method(handle, "_STM") || |
| 1059 | acpi_has_method(handle, "_SDD"); |
| 1060 | } |
| 1061 | |
| 1062 | /* |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1063 | * acpi_bay_match - see if an acpi object is an ejectable driver bay |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1064 | * |
| 1065 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, |
| 1066 | * then we can safely call it an ejectable drive bay |
| 1067 | */ |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1068 | bool acpi_bay_match(acpi_handle handle) |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1069 | { |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1070 | acpi_handle phandle; |
| 1071 | |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1072 | if (!acpi_has_method(handle, "_EJ0")) |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1073 | return false; |
| 1074 | if (acpi_ata_match(handle)) |
| 1075 | return true; |
| 1076 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) |
| 1077 | return false; |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1078 | |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1079 | return acpi_ata_match(phandle); |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1080 | } |
| 1081 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1082 | bool acpi_device_is_battery(struct acpi_device *adev) |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1083 | { |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1084 | struct acpi_hardware_id *hwid; |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1085 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1086 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
| 1087 | if (!strcmp("PNP0C0A", hwid->id)) |
| 1088 | return true; |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1089 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1090 | return false; |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1091 | } |
| 1092 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1093 | static bool is_ejectable_bay(struct acpi_device *adev) |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1094 | { |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1095 | acpi_handle handle = adev->handle; |
| 1096 | |
| 1097 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1098 | return true; |
| 1099 | |
| 1100 | return acpi_bay_match(handle); |
| 1101 | } |
| 1102 | |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1103 | /* |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1104 | * acpi_dock_match - see if an acpi object has a _DCK method |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1105 | */ |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1106 | bool acpi_dock_match(acpi_handle handle) |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1107 | { |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1108 | return acpi_has_method(handle, "_DCK"); |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1109 | } |
| 1110 | |
Hans de Goede | adc8bb8 | 2015-06-16 16:27:45 +0200 | [diff] [blame] | 1111 | static acpi_status |
| 1112 | acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context, |
| 1113 | void **return_value) |
| 1114 | { |
| 1115 | long *cap = context; |
| 1116 | |
| 1117 | if (acpi_has_method(handle, "_BCM") && |
| 1118 | acpi_has_method(handle, "_BCL")) { |
| 1119 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight " |
| 1120 | "support\n")); |
| 1121 | *cap |= ACPI_VIDEO_BACKLIGHT; |
| 1122 | if (!acpi_has_method(handle, "_BQC")) |
| 1123 | printk(KERN_WARNING FW_BUG PREFIX "No _BQC method, " |
| 1124 | "cannot determine initial brightness\n"); |
| 1125 | /* We have backlight support, no need to scan further */ |
| 1126 | return AE_CTRL_TERMINATE; |
| 1127 | } |
| 1128 | return 0; |
| 1129 | } |
| 1130 | |
| 1131 | /* Returns true if the ACPI object is a video device which can be |
| 1132 | * handled by video.ko. |
| 1133 | * The device will get a Linux specific CID added in scan.c to |
| 1134 | * identify the device as an ACPI graphics device |
| 1135 | * Be aware that the graphics device may not be physically present |
| 1136 | * Use acpi_video_get_capabilities() to detect general ACPI video |
| 1137 | * capabilities of present cards |
| 1138 | */ |
| 1139 | long acpi_is_video_device(acpi_handle handle) |
| 1140 | { |
| 1141 | long video_caps = 0; |
| 1142 | |
| 1143 | /* Is this device able to support video switching ? */ |
| 1144 | if (acpi_has_method(handle, "_DOD") || acpi_has_method(handle, "_DOS")) |
| 1145 | video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING; |
| 1146 | |
| 1147 | /* Is this device able to retrieve a video ROM ? */ |
| 1148 | if (acpi_has_method(handle, "_ROM")) |
| 1149 | video_caps |= ACPI_VIDEO_ROM_AVAILABLE; |
| 1150 | |
| 1151 | /* Is this device able to configure which video head to be POSTed ? */ |
| 1152 | if (acpi_has_method(handle, "_VPO") && |
| 1153 | acpi_has_method(handle, "_GPD") && |
| 1154 | acpi_has_method(handle, "_SPD")) |
| 1155 | video_caps |= ACPI_VIDEO_DEVICE_POSTING; |
| 1156 | |
| 1157 | /* Only check for backlight functionality if one of the above hit. */ |
| 1158 | if (video_caps) |
| 1159 | acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, |
| 1160 | ACPI_UINT32_MAX, acpi_backlight_cap_match, NULL, |
| 1161 | &video_caps, NULL); |
| 1162 | |
| 1163 | return video_caps; |
| 1164 | } |
| 1165 | EXPORT_SYMBOL(acpi_is_video_device); |
| 1166 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 1167 | const char *acpi_device_hid(struct acpi_device *device) |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1168 | { |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1169 | struct acpi_hardware_id *hid; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1170 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 1171 | if (list_empty(&device->pnp.ids)) |
| 1172 | return dummy_hid; |
| 1173 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1174 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
| 1175 | return hid->id; |
| 1176 | } |
| 1177 | EXPORT_SYMBOL(acpi_device_hid); |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1178 | |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1179 | static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id) |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1180 | { |
| 1181 | struct acpi_hardware_id *id; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1182 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1183 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
| 1184 | if (!id) |
| 1185 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1186 | |
Rasmus Villemoes | 6a0d12e | 2015-09-09 23:59:43 +0200 | [diff] [blame] | 1187 | id->id = kstrdup_const(dev_id, GFP_KERNEL); |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1188 | if (!id->id) { |
| 1189 | kfree(id); |
| 1190 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1191 | } |
| 1192 | |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1193 | list_add_tail(&id->list, &pnp->ids); |
| 1194 | pnp->type.hardware_id = 1; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1195 | } |
| 1196 | |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1197 | /* |
| 1198 | * Old IBM workstations have a DSDT bug wherein the SMBus object |
| 1199 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" |
| 1200 | * prefix. Work around this. |
| 1201 | */ |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1202 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1203 | { |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1204 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
| 1205 | struct acpi_buffer path = { sizeof(node_name), node_name }; |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1206 | |
| 1207 | if (!dmi_name_in_vendors("IBM")) |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1208 | return false; |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1209 | |
| 1210 | /* Look for SMBS object */ |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1211 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
| 1212 | strcmp("SMBS", path.pointer)) |
| 1213 | return false; |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1214 | |
| 1215 | /* Does it have the necessary (but misnamed) methods? */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1216 | if (acpi_has_method(handle, "SBI") && |
| 1217 | acpi_has_method(handle, "SBR") && |
| 1218 | acpi_has_method(handle, "SBW")) |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1219 | return true; |
| 1220 | |
| 1221 | return false; |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1222 | } |
| 1223 | |
Jiang Liu | ae3caa8 | 2014-02-19 14:02:19 +0800 | [diff] [blame] | 1224 | static bool acpi_object_is_system_bus(acpi_handle handle) |
| 1225 | { |
| 1226 | acpi_handle tmp; |
| 1227 | |
| 1228 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && |
| 1229 | tmp == handle) |
| 1230 | return true; |
| 1231 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && |
| 1232 | tmp == handle) |
| 1233 | return true; |
| 1234 | |
| 1235 | return false; |
| 1236 | } |
| 1237 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1238 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
| 1239 | int device_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1241 | acpi_status status; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1242 | struct acpi_device_info *info; |
Lv Zheng | 78e25fe | 2012-10-31 02:25:24 +0000 | [diff] [blame] | 1243 | struct acpi_pnp_device_id_list *cid_list; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1244 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1246 | switch (device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | case ACPI_BUS_TYPE_DEVICE: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1248 | if (handle == ACPI_ROOT_OBJECT) { |
| 1249 | acpi_add_id(pnp, ACPI_SYSTEM_HID); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1250 | break; |
| 1251 | } |
| 1252 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1253 | status = acpi_get_object_info(handle, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | if (ACPI_FAILURE(status)) { |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1255 | pr_err(PREFIX "%s: Error reading device info\n", |
| 1256 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | return; |
| 1258 | } |
| 1259 | |
Rafael J. Wysocki | 549e684 | 2014-05-30 04:26:18 +0200 | [diff] [blame] | 1260 | if (info->valid & ACPI_VALID_HID) { |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1261 | acpi_add_id(pnp, info->hardware_id.string); |
Rafael J. Wysocki | 549e684 | 2014-05-30 04:26:18 +0200 | [diff] [blame] | 1262 | pnp->type.platform_id = 1; |
| 1263 | } |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1264 | if (info->valid & ACPI_VALID_CID) { |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1265 | cid_list = &info->compatible_id_list; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1266 | for (i = 0; i < cid_list->count; i++) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1267 | acpi_add_id(pnp, cid_list->ids[i].string); |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1268 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | if (info->valid & ACPI_VALID_ADR) { |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1270 | pnp->bus_address = info->address; |
| 1271 | pnp->type.bus_address = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | } |
Lv Zheng | ccf7804 | 2012-10-30 14:41:07 +0100 | [diff] [blame] | 1273 | if (info->valid & ACPI_VALID_UID) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1274 | pnp->unique_id = kstrdup(info->unique_id.string, |
Lv Zheng | ccf7804 | 2012-10-30 14:41:07 +0100 | [diff] [blame] | 1275 | GFP_KERNEL); |
Suthikulpanit, Suravee | 26095a0 | 2015-07-07 01:55:20 +0200 | [diff] [blame] | 1276 | if (info->valid & ACPI_VALID_CLS) |
| 1277 | acpi_add_id(pnp, info->class_code.string); |
Zhang Rui | ae84333 | 2006-12-07 20:57:10 +0800 | [diff] [blame] | 1278 | |
Bjorn Helgaas | a83893ae | 2009-10-02 11:03:12 -0400 | [diff] [blame] | 1279 | kfree(info); |
| 1280 | |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1281 | /* |
| 1282 | * Some devices don't reliably have _HIDs & _CIDs, so add |
| 1283 | * synthetic HIDs to make sure drivers can find them. |
| 1284 | */ |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1285 | if (acpi_is_video_device(handle)) |
| 1286 | acpi_add_id(pnp, ACPI_VIDEO_HID); |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1287 | else if (acpi_bay_match(handle)) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1288 | acpi_add_id(pnp, ACPI_BAY_HID); |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1289 | else if (acpi_dock_match(handle)) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1290 | acpi_add_id(pnp, ACPI_DOCK_HID); |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1291 | else if (acpi_ibm_smbus_match(handle)) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1292 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
Jiang Liu | ae3caa8 | 2014-02-19 14:02:19 +0800 | [diff] [blame] | 1293 | else if (list_empty(&pnp->ids) && |
| 1294 | acpi_object_is_system_bus(handle)) { |
| 1295 | /* \_SB, \_TZ, LNXSYBUS */ |
| 1296 | acpi_add_id(pnp, ACPI_BUS_HID); |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1297 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
| 1298 | strcpy(pnp->device_class, ACPI_BUS_CLASS); |
Bjorn Helgaas | b7b30de | 2010-03-24 10:44:33 -0600 | [diff] [blame] | 1299 | } |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | break; |
| 1302 | case ACPI_BUS_TYPE_POWER: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1303 | acpi_add_id(pnp, ACPI_POWER_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | break; |
| 1305 | case ACPI_BUS_TYPE_PROCESSOR: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1306 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | case ACPI_BUS_TYPE_THERMAL: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1309 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | break; |
| 1311 | case ACPI_BUS_TYPE_POWER_BUTTON: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1312 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | break; |
| 1314 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1315 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | break; |
| 1317 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | } |
| 1319 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1320 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
| 1321 | { |
| 1322 | struct acpi_hardware_id *id, *tmp; |
| 1323 | |
| 1324 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { |
Rasmus Villemoes | 6a0d12e | 2015-09-09 23:59:43 +0200 | [diff] [blame] | 1325 | kfree_const(id->id); |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1326 | kfree(id); |
| 1327 | } |
| 1328 | kfree(pnp->unique_id); |
| 1329 | } |
| 1330 | |
Suthikulpanit, Suravee | b84f196 | 2015-10-28 15:50:48 -0700 | [diff] [blame] | 1331 | /** |
| 1332 | * acpi_dma_supported - Check DMA support for the specified device. |
| 1333 | * @adev: The pointer to acpi device |
| 1334 | * |
| 1335 | * Return false if DMA is not supported. Otherwise, return true |
| 1336 | */ |
| 1337 | bool acpi_dma_supported(struct acpi_device *adev) |
| 1338 | { |
| 1339 | if (!adev) |
| 1340 | return false; |
| 1341 | |
| 1342 | if (adev->flags.cca_seen) |
| 1343 | return true; |
| 1344 | |
| 1345 | /* |
| 1346 | * Per ACPI 6.0 sec 6.2.17, assume devices can do cache-coherent |
| 1347 | * DMA on "Intel platforms". Presumably that includes all x86 and |
| 1348 | * ia64, and other arches will set CONFIG_ACPI_CCA_REQUIRED=y. |
| 1349 | */ |
| 1350 | if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) |
| 1351 | return true; |
| 1352 | |
| 1353 | return false; |
| 1354 | } |
| 1355 | |
| 1356 | /** |
| 1357 | * acpi_get_dma_attr - Check the supported DMA attr for the specified device. |
| 1358 | * @adev: The pointer to acpi device |
| 1359 | * |
| 1360 | * Return enum dev_dma_attr. |
| 1361 | */ |
| 1362 | enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev) |
| 1363 | { |
| 1364 | if (!acpi_dma_supported(adev)) |
| 1365 | return DEV_DMA_NOT_SUPPORTED; |
| 1366 | |
| 1367 | if (adev->flags.coherent_dma) |
| 1368 | return DEV_DMA_COHERENT; |
| 1369 | else |
| 1370 | return DEV_DMA_NON_COHERENT; |
| 1371 | } |
| 1372 | |
Suthikulpanit, Suravee | d056267 | 2015-06-10 11:08:52 -0500 | [diff] [blame] | 1373 | static void acpi_init_coherency(struct acpi_device *adev) |
| 1374 | { |
| 1375 | unsigned long long cca = 0; |
| 1376 | acpi_status status; |
| 1377 | struct acpi_device *parent = adev->parent; |
| 1378 | |
| 1379 | if (parent && parent->flags.cca_seen) { |
| 1380 | /* |
| 1381 | * From ACPI spec, OSPM will ignore _CCA if an ancestor |
| 1382 | * already saw one. |
| 1383 | */ |
| 1384 | adev->flags.cca_seen = 1; |
| 1385 | cca = parent->flags.coherent_dma; |
| 1386 | } else { |
| 1387 | status = acpi_evaluate_integer(adev->handle, "_CCA", |
| 1388 | NULL, &cca); |
| 1389 | if (ACPI_SUCCESS(status)) |
| 1390 | adev->flags.cca_seen = 1; |
| 1391 | else if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) |
| 1392 | /* |
| 1393 | * If architecture does not specify that _CCA is |
| 1394 | * required for DMA-able devices (e.g. x86), |
| 1395 | * we default to _CCA=1. |
| 1396 | */ |
| 1397 | cca = 1; |
| 1398 | else |
| 1399 | acpi_handle_debug(adev->handle, |
| 1400 | "ACPI device is missing _CCA.\n"); |
| 1401 | } |
| 1402 | |
| 1403 | adev->flags.coherent_dma = cca; |
| 1404 | } |
| 1405 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1406 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
| 1407 | int type, unsigned long long sta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | { |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1409 | INIT_LIST_HEAD(&device->pnp.ids); |
| 1410 | device->device_type = type; |
| 1411 | device->handle = handle; |
| 1412 | device->parent = acpi_bus_get_parent(handle); |
Rafael J. Wysocki | 8a0662d | 2014-11-04 14:03:59 +0100 | [diff] [blame] | 1413 | device->fwnode.type = FWNODE_ACPI; |
Rafael J. Wysocki | 25db115 | 2013-11-22 21:56:06 +0100 | [diff] [blame] | 1414 | acpi_set_device_status(device, sta); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1415 | acpi_device_get_busid(device); |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1416 | acpi_set_pnp_ids(handle, &device->pnp, type); |
Mika Westerberg | ffdcd95 | 2014-10-21 13:33:55 +0200 | [diff] [blame] | 1417 | acpi_init_properties(device); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1418 | acpi_bus_get_flags(device); |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1419 | device->flags.match_driver = false; |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 1420 | device->flags.initialized = true; |
Octavian Purdila | 10c7e20 | 2016-07-08 19:13:08 +0300 | [diff] [blame] | 1421 | acpi_device_clear_enumerated(device); |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1422 | device_initialize(&device->dev); |
| 1423 | dev_set_uevent_suppress(&device->dev, true); |
Suthikulpanit, Suravee | d056267 | 2015-06-10 11:08:52 -0500 | [diff] [blame] | 1424 | acpi_init_coherency(device); |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1425 | } |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1426 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1427 | void acpi_device_add_finalize(struct acpi_device *device) |
| 1428 | { |
| 1429 | dev_set_uevent_suppress(&device->dev, false); |
| 1430 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | } |
| 1432 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1433 | static int acpi_add_single_object(struct acpi_device **child, |
| 1434 | acpi_handle handle, int type, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1435 | unsigned long long sta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | { |
Bjorn Helgaas | 77c2488 | 2009-09-21 19:29:30 +0000 | [diff] [blame] | 1437 | int result; |
| 1438 | struct acpi_device *device; |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1439 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 1441 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | if (!device) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 1443 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1444 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1447 | acpi_init_device_object(device, handle, type, sta); |
| 1448 | acpi_bus_get_power_flags(device); |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1449 | acpi_bus_get_wakeup_device_flags(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1451 | result = acpi_device_add(device, acpi_device_release); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1452 | if (result) { |
Hugh Dickins | 718fb0d | 2009-08-06 23:18:12 +0000 | [diff] [blame] | 1453 | acpi_device_release(&device->dev); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1454 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | } |
| 1456 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1457 | acpi_power_add_remove_device(device, true); |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1458 | acpi_device_add_finalize(device); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1459 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
| 1460 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", |
| 1461 | dev_name(&device->dev), (char *) buffer.pointer, |
| 1462 | device->parent ? dev_name(&device->parent->dev) : "(null)")); |
| 1463 | kfree(buffer.pointer); |
| 1464 | *child = device; |
| 1465 | return 0; |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1466 | } |
| 1467 | |
Shannon Zhao | a4e081b | 2016-04-07 20:03:18 +0800 | [diff] [blame] | 1468 | static acpi_status acpi_get_resource_memory(struct acpi_resource *ares, |
| 1469 | void *context) |
| 1470 | { |
| 1471 | struct resource *res = context; |
| 1472 | |
| 1473 | if (acpi_dev_resource_memory(ares, res)) |
| 1474 | return AE_CTRL_TERMINATE; |
| 1475 | |
| 1476 | return AE_OK; |
| 1477 | } |
| 1478 | |
| 1479 | static bool acpi_device_should_be_hidden(acpi_handle handle) |
| 1480 | { |
| 1481 | acpi_status status; |
| 1482 | struct resource res; |
| 1483 | |
| 1484 | /* Check if it should ignore the UART device */ |
| 1485 | if (!(spcr_uart_addr && acpi_has_method(handle, METHOD_NAME__CRS))) |
| 1486 | return false; |
| 1487 | |
| 1488 | /* |
| 1489 | * The UART device described in SPCR table is assumed to have only one |
| 1490 | * memory resource present. So we only look for the first one here. |
| 1491 | */ |
| 1492 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
| 1493 | acpi_get_resource_memory, &res); |
| 1494 | if (ACPI_FAILURE(status) || res.start != spcr_uart_addr) |
| 1495 | return false; |
| 1496 | |
| 1497 | acpi_handle_info(handle, "The UART device @%pa in SPCR table will be hidden\n", |
| 1498 | &res.start); |
| 1499 | |
| 1500 | return true; |
| 1501 | } |
| 1502 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1503 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
| 1504 | unsigned long long *sta) |
| 1505 | { |
| 1506 | acpi_status status; |
| 1507 | acpi_object_type acpi_type; |
| 1508 | |
| 1509 | status = acpi_get_type(handle, &acpi_type); |
| 1510 | if (ACPI_FAILURE(status)) |
| 1511 | return -ENODEV; |
| 1512 | |
| 1513 | switch (acpi_type) { |
| 1514 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
| 1515 | case ACPI_TYPE_DEVICE: |
Shannon Zhao | a4e081b | 2016-04-07 20:03:18 +0800 | [diff] [blame] | 1516 | if (acpi_device_should_be_hidden(handle)) |
| 1517 | return -ENODEV; |
| 1518 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1519 | *type = ACPI_BUS_TYPE_DEVICE; |
| 1520 | status = acpi_bus_get_status_handle(handle, sta); |
| 1521 | if (ACPI_FAILURE(status)) |
Aaron Lu | e399037 | 2015-11-19 11:05:25 +0800 | [diff] [blame] | 1522 | *sta = 0; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1523 | break; |
| 1524 | case ACPI_TYPE_PROCESSOR: |
| 1525 | *type = ACPI_BUS_TYPE_PROCESSOR; |
| 1526 | status = acpi_bus_get_status_handle(handle, sta); |
| 1527 | if (ACPI_FAILURE(status)) |
| 1528 | return -ENODEV; |
| 1529 | break; |
| 1530 | case ACPI_TYPE_THERMAL: |
| 1531 | *type = ACPI_BUS_TYPE_THERMAL; |
| 1532 | *sta = ACPI_STA_DEFAULT; |
| 1533 | break; |
| 1534 | case ACPI_TYPE_POWER: |
| 1535 | *type = ACPI_BUS_TYPE_POWER; |
| 1536 | *sta = ACPI_STA_DEFAULT; |
| 1537 | break; |
| 1538 | default: |
| 1539 | return -ENODEV; |
| 1540 | } |
| 1541 | |
| 1542 | return 0; |
| 1543 | } |
| 1544 | |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 1545 | bool acpi_device_is_present(struct acpi_device *adev) |
| 1546 | { |
| 1547 | if (adev->status.present || adev->status.functional) |
| 1548 | return true; |
| 1549 | |
| 1550 | adev->flags.initialized = false; |
| 1551 | return false; |
| 1552 | } |
| 1553 | |
Rafael J. Wysocki | 4b59cc1 | 2013-03-03 23:06:21 +0100 | [diff] [blame] | 1554 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
Rasmus Villemoes | 844142c | 2015-09-09 23:59:42 +0200 | [diff] [blame] | 1555 | const char *idstr, |
Rafael J. Wysocki | 4b59cc1 | 2013-03-03 23:06:21 +0100 | [diff] [blame] | 1556 | const struct acpi_device_id **matchid) |
| 1557 | { |
| 1558 | const struct acpi_device_id *devid; |
| 1559 | |
Rafael J. Wysocki | aca0a4e | 2014-05-30 04:21:52 +0200 | [diff] [blame] | 1560 | if (handler->match) |
| 1561 | return handler->match(idstr, matchid); |
| 1562 | |
Rafael J. Wysocki | 4b59cc1 | 2013-03-03 23:06:21 +0100 | [diff] [blame] | 1563 | for (devid = handler->ids; devid->id[0]; devid++) |
| 1564 | if (!strcmp((char *)devid->id, idstr)) { |
| 1565 | if (matchid) |
| 1566 | *matchid = devid; |
| 1567 | |
| 1568 | return true; |
| 1569 | } |
| 1570 | |
| 1571 | return false; |
| 1572 | } |
| 1573 | |
Rasmus Villemoes | 844142c | 2015-09-09 23:59:42 +0200 | [diff] [blame] | 1574 | static struct acpi_scan_handler *acpi_scan_match_handler(const char *idstr, |
Toshi Kani | 6b772e8f | 2013-03-04 21:30:43 +0000 | [diff] [blame] | 1575 | const struct acpi_device_id **matchid) |
| 1576 | { |
| 1577 | struct acpi_scan_handler *handler; |
| 1578 | |
| 1579 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) |
| 1580 | if (acpi_scan_handler_matching(handler, idstr, matchid)) |
| 1581 | return handler; |
| 1582 | |
| 1583 | return NULL; |
| 1584 | } |
| 1585 | |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 1586 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
| 1587 | { |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 1588 | if (!!hotplug->enabled == !!val) |
| 1589 | return; |
| 1590 | |
| 1591 | mutex_lock(&acpi_scan_lock); |
| 1592 | |
| 1593 | hotplug->enabled = val; |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 1594 | |
| 1595 | mutex_unlock(&acpi_scan_lock); |
| 1596 | } |
| 1597 | |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 1598 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1599 | { |
Toshi Kani | 6b772e8f | 2013-03-04 21:30:43 +0000 | [diff] [blame] | 1600 | struct acpi_hardware_id *hwid; |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1601 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1602 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1603 | acpi_dock_add(adev); |
| 1604 | return; |
| 1605 | } |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 1606 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
| 1607 | struct acpi_scan_handler *handler; |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1608 | |
Toshi Kani | 6b772e8f | 2013-03-04 21:30:43 +0000 | [diff] [blame] | 1609 | handler = acpi_scan_match_handler(hwid->id, NULL); |
Rafael J. Wysocki | 1a69947 | 2014-02-06 13:58:13 +0100 | [diff] [blame] | 1610 | if (handler) { |
| 1611 | adev->flags.hotplug_notify = true; |
| 1612 | break; |
| 1613 | } |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 1614 | } |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 1615 | } |
| 1616 | |
Lan Tianyu | 40e7fcb | 2014-11-23 21:22:54 +0800 | [diff] [blame] | 1617 | static void acpi_device_dep_initialize(struct acpi_device *adev) |
| 1618 | { |
| 1619 | struct acpi_dep_data *dep; |
| 1620 | struct acpi_handle_list dep_devices; |
| 1621 | acpi_status status; |
| 1622 | int i; |
| 1623 | |
| 1624 | if (!acpi_has_method(adev->handle, "_DEP")) |
| 1625 | return; |
| 1626 | |
| 1627 | status = acpi_evaluate_reference(adev->handle, "_DEP", NULL, |
| 1628 | &dep_devices); |
| 1629 | if (ACPI_FAILURE(status)) { |
Rafael J. Wysocki | 80167a2 | 2014-12-12 22:48:44 +0100 | [diff] [blame] | 1630 | dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n"); |
Lan Tianyu | 40e7fcb | 2014-11-23 21:22:54 +0800 | [diff] [blame] | 1631 | return; |
| 1632 | } |
| 1633 | |
| 1634 | for (i = 0; i < dep_devices.count; i++) { |
| 1635 | struct acpi_device_info *info; |
| 1636 | int skip; |
| 1637 | |
| 1638 | status = acpi_get_object_info(dep_devices.handles[i], &info); |
| 1639 | if (ACPI_FAILURE(status)) { |
Rafael J. Wysocki | 80167a2 | 2014-12-12 22:48:44 +0100 | [diff] [blame] | 1640 | dev_dbg(&adev->dev, "Error reading _DEP device info\n"); |
Lan Tianyu | 40e7fcb | 2014-11-23 21:22:54 +0800 | [diff] [blame] | 1641 | continue; |
| 1642 | } |
| 1643 | |
| 1644 | /* |
| 1645 | * Skip the dependency of Windows System Power |
| 1646 | * Management Controller |
| 1647 | */ |
| 1648 | skip = info->valid & ACPI_VALID_HID && |
| 1649 | !strcmp(info->hardware_id.string, "INT3396"); |
| 1650 | |
| 1651 | kfree(info); |
| 1652 | |
| 1653 | if (skip) |
| 1654 | continue; |
| 1655 | |
| 1656 | dep = kzalloc(sizeof(struct acpi_dep_data), GFP_KERNEL); |
| 1657 | if (!dep) |
| 1658 | return; |
| 1659 | |
| 1660 | dep->master = dep_devices.handles[i]; |
| 1661 | dep->slave = adev->handle; |
| 1662 | adev->dep_unmet++; |
| 1663 | |
| 1664 | mutex_lock(&acpi_dep_list_lock); |
| 1665 | list_add_tail(&dep->node , &acpi_dep_list); |
| 1666 | mutex_unlock(&acpi_dep_list_lock); |
| 1667 | } |
| 1668 | } |
| 1669 | |
Rafael J. Wysocki | e386309 | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 1670 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
| 1671 | void *not_used, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | { |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1673 | struct acpi_device *device = NULL; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1674 | int type; |
| 1675 | unsigned long long sta; |
| 1676 | int result; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1677 | |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 1678 | acpi_bus_get_device(handle, &device); |
| 1679 | if (device) |
| 1680 | goto out; |
| 1681 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1682 | result = acpi_bus_type_and_status(handle, &type, &sta); |
| 1683 | if (result) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1684 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1686 | if (type == ACPI_BUS_TYPE_POWER) { |
| 1687 | acpi_add_power_resource(handle); |
| 1688 | return AE_OK; |
| 1689 | } |
| 1690 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1691 | acpi_add_single_object(&device, handle, type, sta); |
Bjorn Helgaas | e3b87f8 | 2009-09-21 19:30:11 +0000 | [diff] [blame] | 1692 | if (!device) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1693 | return AE_CTRL_DEPTH; |
| 1694 | |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 1695 | acpi_scan_init_hotplug(device); |
Lan Tianyu | 40e7fcb | 2014-11-23 21:22:54 +0800 | [diff] [blame] | 1696 | acpi_device_dep_initialize(device); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 1697 | |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 1698 | out: |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1699 | if (!*return_value) |
| 1700 | *return_value = device; |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1701 | |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1702 | return AE_OK; |
| 1703 | } |
| 1704 | |
Zhang Rui | 4845934 | 2014-05-30 14:35:34 +0200 | [diff] [blame] | 1705 | static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data) |
| 1706 | { |
| 1707 | bool *is_spi_i2c_slave_p = data; |
| 1708 | |
| 1709 | if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) |
| 1710 | return 1; |
| 1711 | |
| 1712 | /* |
| 1713 | * devices that are connected to UART still need to be enumerated to |
| 1714 | * platform bus |
| 1715 | */ |
| 1716 | if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART) |
| 1717 | *is_spi_i2c_slave_p = true; |
| 1718 | |
| 1719 | /* no need to do more checking */ |
| 1720 | return -1; |
| 1721 | } |
| 1722 | |
| 1723 | static void acpi_default_enumeration(struct acpi_device *device) |
| 1724 | { |
| 1725 | struct list_head resource_list; |
| 1726 | bool is_spi_i2c_slave = false; |
| 1727 | |
Zhang Rui | 4845934 | 2014-05-30 14:35:34 +0200 | [diff] [blame] | 1728 | /* |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 1729 | * Do not enumerate SPI/I2C slaves as they will be enumerated by their |
Zhang Rui | 4845934 | 2014-05-30 14:35:34 +0200 | [diff] [blame] | 1730 | * respective parents. |
| 1731 | */ |
| 1732 | INIT_LIST_HEAD(&resource_list); |
| 1733 | acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave, |
| 1734 | &is_spi_i2c_slave); |
| 1735 | acpi_dev_free_resource_list(&resource_list); |
Octavian Purdila | 10c7e20 | 2016-07-08 19:13:08 +0300 | [diff] [blame] | 1736 | if (!is_spi_i2c_slave) { |
Zhang Rui | 4845934 | 2014-05-30 14:35:34 +0200 | [diff] [blame] | 1737 | acpi_create_platform_device(device); |
Octavian Purdila | 10c7e20 | 2016-07-08 19:13:08 +0300 | [diff] [blame] | 1738 | acpi_device_set_enumerated(device); |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 1739 | } else { |
| 1740 | blocking_notifier_call_chain(&acpi_reconfig_chain, |
| 1741 | ACPI_RECONFIG_DEVICE_ADD, device); |
Octavian Purdila | 10c7e20 | 2016-07-08 19:13:08 +0300 | [diff] [blame] | 1742 | } |
Zhang Rui | 4845934 | 2014-05-30 14:35:34 +0200 | [diff] [blame] | 1743 | } |
| 1744 | |
Rafael J. Wysocki | 7d28435 | 2015-04-24 02:18:01 +0200 | [diff] [blame] | 1745 | static const struct acpi_device_id generic_device_ids[] = { |
Rafael J. Wysocki | ee89209 | 2015-05-22 04:24:34 +0200 | [diff] [blame] | 1746 | {ACPI_DT_NAMESPACE_HID, }, |
Rafael J. Wysocki | 7d28435 | 2015-04-24 02:18:01 +0200 | [diff] [blame] | 1747 | {"", }, |
| 1748 | }; |
| 1749 | |
| 1750 | static int acpi_generic_device_attach(struct acpi_device *adev, |
| 1751 | const struct acpi_device_id *not_used) |
| 1752 | { |
| 1753 | /* |
Rafael J. Wysocki | ee89209 | 2015-05-22 04:24:34 +0200 | [diff] [blame] | 1754 | * Since ACPI_DT_NAMESPACE_HID is the only ID handled here, the test |
| 1755 | * below can be unconditional. |
Rafael J. Wysocki | 7d28435 | 2015-04-24 02:18:01 +0200 | [diff] [blame] | 1756 | */ |
| 1757 | if (adev->data.of_compatible) |
| 1758 | acpi_default_enumeration(adev); |
| 1759 | |
| 1760 | return 1; |
| 1761 | } |
| 1762 | |
| 1763 | static struct acpi_scan_handler generic_device_handler = { |
| 1764 | .ids = generic_device_ids, |
| 1765 | .attach = acpi_generic_device_attach, |
| 1766 | }; |
| 1767 | |
Rafael J. Wysocki | 87b85b3 | 2013-02-06 13:05:22 +0100 | [diff] [blame] | 1768 | static int acpi_scan_attach_handler(struct acpi_device *device) |
| 1769 | { |
| 1770 | struct acpi_hardware_id *hwid; |
| 1771 | int ret = 0; |
| 1772 | |
| 1773 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1774 | const struct acpi_device_id *devid; |
| 1775 | struct acpi_scan_handler *handler; |
Rafael J. Wysocki | 87b85b3 | 2013-02-06 13:05:22 +0100 | [diff] [blame] | 1776 | |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1777 | handler = acpi_scan_match_handler(hwid->id, &devid); |
| 1778 | if (handler) { |
Rafael J. Wysocki | d34afa9 | 2014-05-30 04:27:31 +0200 | [diff] [blame] | 1779 | if (!handler->attach) { |
| 1780 | device->pnp.type.platform_id = 0; |
| 1781 | continue; |
| 1782 | } |
Rafael J. Wysocki | 9cb32ac | 2014-02-11 00:35:46 +0100 | [diff] [blame] | 1783 | device->handler = handler; |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1784 | ret = handler->attach(device, devid); |
Rafael J. Wysocki | 9cb32ac | 2014-02-11 00:35:46 +0100 | [diff] [blame] | 1785 | if (ret > 0) |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1786 | break; |
Rafael J. Wysocki | 9cb32ac | 2014-02-11 00:35:46 +0100 | [diff] [blame] | 1787 | |
| 1788 | device->handler = NULL; |
| 1789 | if (ret < 0) |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1790 | break; |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 1791 | } |
Rafael J. Wysocki | 87b85b3 | 2013-02-06 13:05:22 +0100 | [diff] [blame] | 1792 | } |
Zhang Rui | 4845934 | 2014-05-30 14:35:34 +0200 | [diff] [blame] | 1793 | |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1794 | return ret; |
| 1795 | } |
| 1796 | |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1797 | static void acpi_bus_attach(struct acpi_device *device) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1798 | { |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1799 | struct acpi_device *child; |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1800 | acpi_handle ejd; |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1801 | int ret; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1802 | |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1803 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
| 1804 | register_dock_dependent_device(device, ejd); |
| 1805 | |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1806 | acpi_bus_get_status(device); |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 1807 | /* Skip devices that are not present. */ |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1808 | if (!acpi_device_is_present(device)) { |
Octavian Purdila | 10c7e20 | 2016-07-08 19:13:08 +0300 | [diff] [blame] | 1809 | acpi_device_clear_enumerated(device); |
Rafael J. Wysocki | 1b1f3e1 | 2015-01-01 23:38:28 +0100 | [diff] [blame] | 1810 | device->flags.power_manageable = 0; |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1811 | return; |
| 1812 | } |
Rafael J. Wysocki | 3a391a3 | 2013-07-12 13:45:59 +0200 | [diff] [blame] | 1813 | if (device->handler) |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1814 | goto ok; |
Rafael J. Wysocki | 3a391a3 | 2013-07-12 13:45:59 +0200 | [diff] [blame] | 1815 | |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 1816 | if (!device->flags.initialized) { |
Rafael J. Wysocki | 1b1f3e1 | 2015-01-01 23:38:28 +0100 | [diff] [blame] | 1817 | device->flags.power_manageable = |
| 1818 | device->power.states[ACPI_STATE_D0].flags.valid; |
| 1819 | if (acpi_bus_init_power(device)) |
| 1820 | device->flags.power_manageable = 0; |
| 1821 | |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 1822 | device->flags.initialized = true; |
| 1823 | } |
Octavian Purdila | 10c7e20 | 2016-07-08 19:13:08 +0300 | [diff] [blame] | 1824 | |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1825 | ret = acpi_scan_attach_handler(device); |
Rafael J. Wysocki | 6931007 | 2013-11-07 01:41:01 +0100 | [diff] [blame] | 1826 | if (ret < 0) |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1827 | return; |
Rafael J. Wysocki | 6931007 | 2013-11-07 01:41:01 +0100 | [diff] [blame] | 1828 | |
| 1829 | device->flags.match_driver = true; |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1830 | if (!ret) { |
| 1831 | ret = device_attach(&device->dev); |
| 1832 | if (ret < 0) |
| 1833 | return; |
Rafael J. Wysocki | 7d28435 | 2015-04-24 02:18:01 +0200 | [diff] [blame] | 1834 | |
| 1835 | if (!ret && device->pnp.type.platform_id) |
| 1836 | acpi_default_enumeration(device); |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1837 | } |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 1838 | |
| 1839 | ok: |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1840 | list_for_each_entry(child, &device->children, node) |
| 1841 | acpi_bus_attach(child); |
Rafael J. Wysocki | 8ab17fc | 2014-09-21 02:58:18 +0200 | [diff] [blame] | 1842 | |
| 1843 | if (device->handler && device->handler->hotplug.notify_online) |
| 1844 | device->handler->hotplug.notify_online(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | |
Lan Tianyu | 40e7fcb | 2014-11-23 21:22:54 +0800 | [diff] [blame] | 1847 | void acpi_walk_dep_device_list(acpi_handle handle) |
| 1848 | { |
| 1849 | struct acpi_dep_data *dep, *tmp; |
| 1850 | struct acpi_device *adev; |
| 1851 | |
| 1852 | mutex_lock(&acpi_dep_list_lock); |
| 1853 | list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) { |
| 1854 | if (dep->master == handle) { |
| 1855 | acpi_bus_get_device(dep->slave, &adev); |
| 1856 | if (!adev) |
| 1857 | continue; |
| 1858 | |
| 1859 | adev->dep_unmet--; |
| 1860 | if (!adev->dep_unmet) |
| 1861 | acpi_bus_attach(adev); |
| 1862 | list_del(&dep->node); |
| 1863 | kfree(dep); |
| 1864 | } |
| 1865 | } |
| 1866 | mutex_unlock(&acpi_dep_list_lock); |
| 1867 | } |
| 1868 | EXPORT_SYMBOL_GPL(acpi_walk_dep_device_list); |
| 1869 | |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1870 | /** |
| 1871 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
| 1872 | * @handle: Root of the namespace scope to scan. |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 1873 | * |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1874 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
| 1875 | * found devices. |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 1876 | * |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1877 | * If no devices were found, -ENODEV is returned, but it does not mean that |
| 1878 | * there has been a real error. There just have been no suitable ACPI objects |
| 1879 | * in the table trunk from which the kernel could create a device and add an |
| 1880 | * appropriate driver. |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 1881 | * |
| 1882 | * Must be called under acpi_scan_lock. |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 1883 | */ |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1884 | int acpi_bus_scan(acpi_handle handle) |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1885 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | void *device = NULL; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1887 | |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 1888 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Rafael J. Wysocki | e386309 | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 1890 | acpi_bus_check_add, NULL, NULL, &device); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1891 | |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1892 | if (device) { |
| 1893 | acpi_bus_attach(device); |
| 1894 | return 0; |
| 1895 | } |
| 1896 | return -ENODEV; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1897 | } |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1898 | EXPORT_SYMBOL(acpi_bus_scan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 1900 | /** |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1901 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
| 1902 | * @adev: Root of the ACPI namespace scope to walk. |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 1903 | * |
| 1904 | * Must be called under acpi_scan_lock. |
| 1905 | */ |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1906 | void acpi_bus_trim(struct acpi_device *adev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1907 | { |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1908 | struct acpi_scan_handler *handler = adev->handler; |
| 1909 | struct acpi_device *child; |
| 1910 | |
| 1911 | list_for_each_entry_reverse(child, &adev->children, node) |
| 1912 | acpi_bus_trim(child); |
| 1913 | |
Rafael J. Wysocki | a951c77 | 2014-01-27 23:08:09 +0100 | [diff] [blame] | 1914 | adev->flags.match_driver = false; |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1915 | if (handler) { |
| 1916 | if (handler->detach) |
| 1917 | handler->detach(adev); |
| 1918 | |
| 1919 | adev->handler = NULL; |
| 1920 | } else { |
| 1921 | device_release_driver(&adev->dev); |
| 1922 | } |
Rafael J. Wysocki | cecdb19 | 2013-01-15 13:24:02 +0100 | [diff] [blame] | 1923 | /* |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1924 | * Most likely, the device is going away, so put it into D3cold before |
| 1925 | * that. |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1926 | */ |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 1927 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
| 1928 | adev->flags.initialized = false; |
Octavian Purdila | 10c7e20 | 2016-07-08 19:13:08 +0300 | [diff] [blame] | 1929 | acpi_device_clear_enumerated(adev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | } |
Kristen Accardi | ceaba66 | 2006-02-23 17:56:01 -0800 | [diff] [blame] | 1931 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
| 1932 | |
Bjorn Helgaas | e8b945c | 2009-09-21 19:28:59 +0000 | [diff] [blame] | 1933 | static int acpi_bus_scan_fixed(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1935 | int result = 0; |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1936 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | /* |
| 1938 | * Enumerate all fixed-feature devices. |
| 1939 | */ |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1940 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
| 1941 | struct acpi_device *device = NULL; |
| 1942 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1943 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1944 | ACPI_BUS_TYPE_POWER_BUTTON, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1945 | ACPI_STA_DEFAULT); |
| 1946 | if (result) |
| 1947 | return result; |
| 1948 | |
Rafael J. Wysocki | 8834616 | 2013-11-18 14:18:47 +0100 | [diff] [blame] | 1949 | device->flags.match_driver = true; |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1950 | result = device_attach(&device->dev); |
| 1951 | if (result < 0) |
| 1952 | return result; |
| 1953 | |
Daniel Drake | c10d7a13 | 2012-05-10 00:08:43 +0100 | [diff] [blame] | 1954 | device_init_wakeup(&device->dev, true); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1955 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1957 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
| 1958 | struct acpi_device *device = NULL; |
| 1959 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1960 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1961 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1962 | ACPI_STA_DEFAULT); |
| 1963 | if (result) |
| 1964 | return result; |
| 1965 | |
Rafael J. Wysocki | 8834616 | 2013-11-18 14:18:47 +0100 | [diff] [blame] | 1966 | device->flags.match_driver = true; |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1967 | result = device_attach(&device->dev); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1968 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1970 | return result < 0 ? result : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | } |
| 1972 | |
Shannon Zhao | a4e081b | 2016-04-07 20:03:18 +0800 | [diff] [blame] | 1973 | static void __init acpi_get_spcr_uart_addr(void) |
| 1974 | { |
| 1975 | acpi_status status; |
| 1976 | struct acpi_table_spcr *spcr_ptr; |
| 1977 | |
| 1978 | status = acpi_get_table(ACPI_SIG_SPCR, 0, |
| 1979 | (struct acpi_table_header **)&spcr_ptr); |
| 1980 | if (ACPI_SUCCESS(status)) |
| 1981 | spcr_uart_addr = spcr_ptr->serial_port.address; |
| 1982 | else |
| 1983 | printk(KERN_WARNING PREFIX "STAO table present, but SPCR is missing\n"); |
| 1984 | } |
| 1985 | |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 1986 | static bool acpi_scan_initialized; |
| 1987 | |
Bjorn Helgaas | e747f27 | 2009-03-24 16:49:43 -0600 | [diff] [blame] | 1988 | int __init acpi_scan_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | { |
| 1990 | int result; |
Shannon Zhao | a4e081b | 2016-04-07 20:03:18 +0800 | [diff] [blame] | 1991 | acpi_status status; |
| 1992 | struct acpi_table_stao *stao_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | |
Rafael J. Wysocki | 92ef2a2 | 2012-12-21 00:36:40 +0100 | [diff] [blame] | 1994 | acpi_pci_root_init(); |
Rafael J. Wysocki | 4daeaf6 | 2013-01-30 14:27:37 +0100 | [diff] [blame] | 1995 | acpi_pci_link_init(); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 1996 | acpi_processor_init(); |
Rafael J. Wysocki | f58b082 | 2013-03-06 23:46:20 +0100 | [diff] [blame] | 1997 | acpi_lpss_init(); |
Ken Xue | 92082a8 | 2015-02-06 08:27:51 +0800 | [diff] [blame] | 1998 | acpi_apd_init(); |
Lan Tianyu | 2fa97fe | 2013-06-05 02:27:50 +0000 | [diff] [blame] | 1999 | acpi_cmos_rtc_init(); |
Rafael J. Wysocki | 737f1a9 | 2013-02-08 23:52:39 +0100 | [diff] [blame] | 2000 | acpi_container_init(); |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 2001 | acpi_memory_hotplug_init(); |
Zhang Rui | eec15ed | 2014-05-30 04:23:01 +0200 | [diff] [blame] | 2002 | acpi_pnp_init(); |
Zhang Rui | 3230bbf | 2014-03-14 00:34:05 +0800 | [diff] [blame] | 2003 | acpi_int340x_thermal_init(); |
Graeme Gregory | 6ce2e18 | 2016-01-20 20:29:27 +0600 | [diff] [blame] | 2004 | acpi_amba_init(); |
Rafael J. Wysocki | 97d9a9e | 2010-11-25 00:10:02 +0100 | [diff] [blame] | 2005 | |
Rafael J. Wysocki | 7d28435 | 2015-04-24 02:18:01 +0200 | [diff] [blame] | 2006 | acpi_scan_add_handler(&generic_device_handler); |
| 2007 | |
Shannon Zhao | a4e081b | 2016-04-07 20:03:18 +0800 | [diff] [blame] | 2008 | /* |
| 2009 | * If there is STAO table, check whether it needs to ignore the UART |
| 2010 | * device in SPCR table. |
| 2011 | */ |
| 2012 | status = acpi_get_table(ACPI_SIG_STAO, 0, |
| 2013 | (struct acpi_table_header **)&stao_ptr); |
| 2014 | if (ACPI_SUCCESS(status)) { |
| 2015 | if (stao_ptr->header.length > sizeof(struct acpi_table_stao)) |
| 2016 | printk(KERN_INFO PREFIX "STAO Name List not yet supported."); |
| 2017 | |
| 2018 | if (stao_ptr->ignore_uart) |
| 2019 | acpi_get_spcr_uart_addr(); |
| 2020 | } |
| 2021 | |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2022 | mutex_lock(&acpi_scan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | * Enumerate devices in the ACPI namespace. |
| 2025 | */ |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 2026 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | if (result) |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2028 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 2030 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | if (result) |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2032 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | |
Aaron Lu | 2650ef4 | 2014-04-28 10:38:04 +0800 | [diff] [blame] | 2034 | /* Fixed feature devices do not exist on HW-reduced platform */ |
| 2035 | if (!acpi_gbl_reduced_hardware) { |
| 2036 | result = acpi_bus_scan_fixed(); |
| 2037 | if (result) { |
| 2038 | acpi_detach_data(acpi_root->handle, |
| 2039 | acpi_scan_drop_device); |
| 2040 | acpi_device_del(acpi_root); |
| 2041 | put_device(&acpi_root->dev); |
| 2042 | goto out; |
| 2043 | } |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 2044 | } |
| 2045 | |
| 2046 | acpi_update_all_gpes(); |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2047 | |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 2048 | acpi_scan_initialized = true; |
| 2049 | |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2050 | out: |
| 2051 | mutex_unlock(&acpi_scan_lock); |
| 2052 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | } |
Marc Zyngier | e647b53 | 2015-09-28 15:49:12 +0100 | [diff] [blame] | 2054 | |
| 2055 | static struct acpi_probe_entry *ape; |
| 2056 | static int acpi_probe_count; |
Lorenzo Pieralisi | 5331d9c | 2016-08-16 16:59:53 +0100 | [diff] [blame] | 2057 | static DEFINE_MUTEX(acpi_probe_mutex); |
Marc Zyngier | e647b53 | 2015-09-28 15:49:12 +0100 | [diff] [blame] | 2058 | |
| 2059 | static int __init acpi_match_madt(struct acpi_subtable_header *header, |
| 2060 | const unsigned long end) |
| 2061 | { |
| 2062 | if (!ape->subtable_valid || ape->subtable_valid(header, ape)) |
| 2063 | if (!ape->probe_subtbl(header, end)) |
| 2064 | acpi_probe_count++; |
| 2065 | |
| 2066 | return 0; |
| 2067 | } |
| 2068 | |
| 2069 | int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr) |
| 2070 | { |
| 2071 | int count = 0; |
| 2072 | |
| 2073 | if (acpi_disabled) |
| 2074 | return 0; |
| 2075 | |
Lorenzo Pieralisi | 5331d9c | 2016-08-16 16:59:53 +0100 | [diff] [blame] | 2076 | mutex_lock(&acpi_probe_mutex); |
Marc Zyngier | e647b53 | 2015-09-28 15:49:12 +0100 | [diff] [blame] | 2077 | for (ape = ap_head; nr; ape++, nr--) { |
| 2078 | if (ACPI_COMPARE_NAME(ACPI_SIG_MADT, ape->id)) { |
| 2079 | acpi_probe_count = 0; |
| 2080 | acpi_table_parse_madt(ape->type, acpi_match_madt, 0); |
| 2081 | count += acpi_probe_count; |
| 2082 | } else { |
| 2083 | int res; |
| 2084 | res = acpi_table_parse(ape->id, ape->probe_table); |
| 2085 | if (!res) |
| 2086 | count++; |
| 2087 | } |
| 2088 | } |
Lorenzo Pieralisi | 5331d9c | 2016-08-16 16:59:53 +0100 | [diff] [blame] | 2089 | mutex_unlock(&acpi_probe_mutex); |
Marc Zyngier | e647b53 | 2015-09-28 15:49:12 +0100 | [diff] [blame] | 2090 | |
| 2091 | return count; |
| 2092 | } |
Octavian Purdila | 68bdb67 | 2016-07-08 19:13:09 +0300 | [diff] [blame] | 2093 | |
| 2094 | struct acpi_table_events_work { |
| 2095 | struct work_struct work; |
| 2096 | void *table; |
| 2097 | u32 event; |
| 2098 | }; |
| 2099 | |
| 2100 | static void acpi_table_events_fn(struct work_struct *work) |
| 2101 | { |
| 2102 | struct acpi_table_events_work *tew; |
| 2103 | |
| 2104 | tew = container_of(work, struct acpi_table_events_work, work); |
| 2105 | |
| 2106 | if (tew->event == ACPI_TABLE_EVENT_LOAD) { |
| 2107 | acpi_scan_lock_acquire(); |
| 2108 | acpi_bus_scan(ACPI_ROOT_OBJECT); |
| 2109 | acpi_scan_lock_release(); |
| 2110 | } |
| 2111 | |
| 2112 | kfree(tew); |
| 2113 | } |
| 2114 | |
| 2115 | void acpi_scan_table_handler(u32 event, void *table, void *context) |
| 2116 | { |
| 2117 | struct acpi_table_events_work *tew; |
| 2118 | |
| 2119 | if (!acpi_scan_initialized) |
| 2120 | return; |
| 2121 | |
| 2122 | if (event != ACPI_TABLE_EVENT_LOAD) |
| 2123 | return; |
| 2124 | |
| 2125 | tew = kmalloc(sizeof(*tew), GFP_KERNEL); |
| 2126 | if (!tew) |
| 2127 | return; |
| 2128 | |
| 2129 | INIT_WORK(&tew->work, acpi_table_events_fn); |
| 2130 | tew->table = table; |
| 2131 | tew->event = event; |
| 2132 | |
| 2133 | schedule_work(&tew->work); |
| 2134 | } |
| 2135 | |
| 2136 | int acpi_reconfig_notifier_register(struct notifier_block *nb) |
| 2137 | { |
| 2138 | return blocking_notifier_chain_register(&acpi_reconfig_chain, nb); |
| 2139 | } |
| 2140 | EXPORT_SYMBOL(acpi_reconfig_notifier_register); |
| 2141 | |
| 2142 | int acpi_reconfig_notifier_unregister(struct notifier_block *nb) |
| 2143 | { |
| 2144 | return blocking_notifier_chain_unregister(&acpi_reconfig_chain, nb); |
| 2145 | } |
| 2146 | EXPORT_SYMBOL(acpi_reconfig_notifier_unregister); |