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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 15 | #include <asm/pgtable.h> |
| 16 | |
Bjorn Helgaas | e60cc7a | 2009-03-13 12:08:26 -0600 | [diff] [blame] | 17 | #include "internal.h" |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 20 | ACPI_MODULE_NAME("scan"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 21 | extern struct acpi_device *acpi_root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | #define ACPI_BUS_CLASS "system_bus" |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 24 | #define ACPI_BUS_HID "LNXSYBUS" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
| 26 | |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 27 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
| 28 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 29 | #define INVALID_ACPI_HANDLE ((acpi_handle)empty_zero_page) |
| 30 | |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 31 | /* |
| 32 | * If set, devices will be hot-removed even if they cannot be put offline |
| 33 | * gracefully (from the kernel's standpoint). |
| 34 | */ |
| 35 | bool acpi_force_hot_remove; |
| 36 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 37 | static const char *dummy_hid = "device"; |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 38 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 39 | static LIST_HEAD(acpi_bus_id_list); |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 40 | static DEFINE_MUTEX(acpi_scan_lock); |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 41 | static LIST_HEAD(acpi_scan_handlers_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 42 | DEFINE_MUTEX(acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | LIST_HEAD(acpi_wakeup_device_list); |
Rafael J. Wysocki | e525506 | 2014-02-04 00:43:17 +0100 | [diff] [blame] | 44 | static DEFINE_MUTEX(acpi_hp_context_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 46 | struct acpi_device_bus_id{ |
Zhang Rui | bb09585 | 2007-01-04 15:03:18 +0800 | [diff] [blame] | 47 | char bus_id[15]; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 48 | unsigned int instance_no; |
| 49 | struct list_head node; |
| 50 | }; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 51 | |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 52 | void acpi_scan_lock_acquire(void) |
| 53 | { |
| 54 | mutex_lock(&acpi_scan_lock); |
| 55 | } |
| 56 | EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire); |
| 57 | |
| 58 | void acpi_scan_lock_release(void) |
| 59 | { |
| 60 | mutex_unlock(&acpi_scan_lock); |
| 61 | } |
| 62 | EXPORT_SYMBOL_GPL(acpi_scan_lock_release); |
| 63 | |
Rafael J. Wysocki | e525506 | 2014-02-04 00:43:17 +0100 | [diff] [blame] | 64 | void acpi_lock_hp_context(void) |
| 65 | { |
| 66 | mutex_lock(&acpi_hp_context_lock); |
| 67 | } |
| 68 | |
| 69 | void acpi_unlock_hp_context(void) |
| 70 | { |
| 71 | mutex_unlock(&acpi_hp_context_lock); |
| 72 | } |
| 73 | |
Rafael J. Wysocki | 5d51320 | 2014-02-22 00:48:31 +0100 | [diff] [blame] | 74 | void acpi_initialize_hp_context(struct acpi_device *adev, |
| 75 | struct acpi_hotplug_context *hp, |
| 76 | int (*notify)(struct acpi_device *, u32), |
| 77 | void (*uevent)(struct acpi_device *, u32)) |
| 78 | { |
| 79 | acpi_lock_hp_context(); |
| 80 | acpi_set_hp_context(adev, hp, notify, uevent, NULL); |
| 81 | acpi_unlock_hp_context(); |
| 82 | } |
| 83 | EXPORT_SYMBOL_GPL(acpi_initialize_hp_context); |
| 84 | |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 85 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
| 86 | { |
| 87 | if (!handler || !handler->attach) |
| 88 | return -EINVAL; |
| 89 | |
| 90 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); |
| 91 | return 0; |
| 92 | } |
| 93 | |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 94 | int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, |
| 95 | const char *hotplug_profile_name) |
| 96 | { |
| 97 | int error; |
| 98 | |
| 99 | error = acpi_scan_add_handler(handler); |
| 100 | if (error) |
| 101 | return error; |
| 102 | |
| 103 | acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); |
| 104 | return 0; |
| 105 | } |
| 106 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 107 | /* |
| 108 | * Creates hid/cid(s) string needed for modalias and uevent |
| 109 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: |
| 110 | * char *modalias: "acpi:IBM0001:ACPI0001" |
Zhang Rui | 3d8e009 | 2014-01-14 16:46:35 +0800 | [diff] [blame] | 111 | * Return: 0: no _HID and no _CID |
| 112 | * -EINVAL: output error |
| 113 | * -ENOMEM: output is truncated |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 114 | */ |
Adrian Bunk | b3e572d | 2007-08-14 23:22:35 +0200 | [diff] [blame] | 115 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
| 116 | int size) |
| 117 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 118 | int len; |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 119 | int count; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 120 | struct acpi_hardware_id *id; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 121 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 122 | if (list_empty(&acpi_dev->pnp.ids)) |
| 123 | return 0; |
| 124 | |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 125 | len = snprintf(modalias, size, "acpi:"); |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 126 | size -= len; |
| 127 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 128 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
| 129 | count = snprintf(&modalias[len], size, "%s:", id->id); |
Zhang Rui | 3d8e009 | 2014-01-14 16:46:35 +0800 | [diff] [blame] | 130 | if (count < 0) |
| 131 | return EINVAL; |
| 132 | if (count >= size) |
| 133 | return -ENOMEM; |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 134 | len += count; |
| 135 | size -= count; |
| 136 | } |
| 137 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 138 | modalias[len] = '\0'; |
| 139 | return len; |
| 140 | } |
| 141 | |
Zhang Rui | 6eb2451 | 2014-01-14 16:46:36 +0800 | [diff] [blame] | 142 | /* |
| 143 | * Creates uevent modalias field for ACPI enumerated devices. |
| 144 | * Because the other buses does not support ACPI HIDs & CIDs. |
| 145 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: |
| 146 | * "acpi:IBM0001:ACPI0001" |
| 147 | */ |
| 148 | int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) |
| 149 | { |
| 150 | struct acpi_device *acpi_dev; |
| 151 | int len; |
| 152 | |
| 153 | acpi_dev = ACPI_COMPANION(dev); |
| 154 | if (!acpi_dev) |
| 155 | return -ENODEV; |
| 156 | |
| 157 | /* Fall back to bus specific way of modalias exporting */ |
| 158 | if (list_empty(&acpi_dev->pnp.ids)) |
| 159 | return -ENODEV; |
| 160 | |
| 161 | if (add_uevent_var(env, "MODALIAS=")) |
| 162 | return -ENOMEM; |
| 163 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], |
| 164 | sizeof(env->buf) - env->buflen); |
| 165 | if (len <= 0) |
| 166 | return len; |
| 167 | env->buflen += len; |
| 168 | return 0; |
| 169 | } |
| 170 | EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias); |
| 171 | |
| 172 | /* |
| 173 | * Creates modalias sysfs attribute for ACPI enumerated devices. |
| 174 | * Because the other buses does not support ACPI HIDs & CIDs. |
| 175 | * e.g. for a device with hid:IBM0001 and cid:ACPI0001 you get: |
| 176 | * "acpi:IBM0001:ACPI0001" |
| 177 | */ |
| 178 | int acpi_device_modalias(struct device *dev, char *buf, int size) |
| 179 | { |
| 180 | struct acpi_device *acpi_dev; |
| 181 | int len; |
| 182 | |
| 183 | acpi_dev = ACPI_COMPANION(dev); |
| 184 | if (!acpi_dev) |
| 185 | return -ENODEV; |
| 186 | |
| 187 | /* Fall back to bus specific way of modalias exporting */ |
| 188 | if (list_empty(&acpi_dev->pnp.ids)) |
| 189 | return -ENODEV; |
| 190 | |
| 191 | len = create_modalias(acpi_dev, buf, size -1); |
| 192 | if (len <= 0) |
| 193 | return len; |
| 194 | buf[len++] = '\n'; |
| 195 | return len; |
| 196 | } |
| 197 | EXPORT_SYMBOL_GPL(acpi_device_modalias); |
| 198 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 199 | static ssize_t |
| 200 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 201 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 202 | int len; |
| 203 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 204 | len = create_modalias(acpi_dev, buf, 1024); |
| 205 | if (len <= 0) |
Zhang Rui | 3d8e009 | 2014-01-14 16:46:35 +0800 | [diff] [blame] | 206 | return len; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 207 | buf[len++] = '\n'; |
| 208 | return len; |
| 209 | } |
| 210 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); |
| 211 | |
Rafael J. Wysocki | caa73ea | 2013-12-29 15:25:48 +0100 | [diff] [blame] | 212 | bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent) |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 213 | { |
| 214 | struct acpi_device_physical_node *pn; |
| 215 | bool offline = true; |
| 216 | |
| 217 | mutex_lock(&adev->physical_node_lock); |
| 218 | |
| 219 | list_for_each_entry(pn, &adev->physical_node_list, node) |
| 220 | if (device_supports_offline(pn->dev) && !pn->dev->offline) { |
Rafael J. Wysocki | caa73ea | 2013-12-29 15:25:48 +0100 | [diff] [blame] | 221 | if (uevent) |
| 222 | kobject_uevent(&pn->dev->kobj, KOBJ_CHANGE); |
| 223 | |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 224 | offline = false; |
| 225 | break; |
| 226 | } |
| 227 | |
| 228 | mutex_unlock(&adev->physical_node_lock); |
| 229 | return offline; |
| 230 | } |
| 231 | |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 232 | static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data, |
| 233 | void **ret_p) |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 234 | { |
| 235 | struct acpi_device *device = NULL; |
| 236 | struct acpi_device_physical_node *pn; |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 237 | bool second_pass = (bool)data; |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 238 | acpi_status status = AE_OK; |
| 239 | |
| 240 | if (acpi_bus_get_device(handle, &device)) |
| 241 | return AE_OK; |
| 242 | |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 243 | if (device->handler && !device->handler->hotplug.enabled) { |
| 244 | *ret_p = &device->dev; |
| 245 | return AE_SUPPORT; |
| 246 | } |
| 247 | |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 248 | mutex_lock(&device->physical_node_lock); |
| 249 | |
| 250 | list_for_each_entry(pn, &device->physical_node_list, node) { |
| 251 | int ret; |
| 252 | |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 253 | if (second_pass) { |
| 254 | /* Skip devices offlined by the first pass. */ |
| 255 | if (pn->put_online) |
| 256 | continue; |
| 257 | } else { |
| 258 | pn->put_online = false; |
| 259 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 260 | ret = device_offline(pn->dev); |
| 261 | if (acpi_force_hot_remove) |
| 262 | continue; |
| 263 | |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 264 | if (ret >= 0) { |
| 265 | pn->put_online = !ret; |
| 266 | } else { |
| 267 | *ret_p = pn->dev; |
| 268 | if (second_pass) { |
| 269 | status = AE_ERROR; |
| 270 | break; |
| 271 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 272 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | mutex_unlock(&device->physical_node_lock); |
| 276 | |
| 277 | return status; |
| 278 | } |
| 279 | |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 280 | static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data, |
| 281 | void **ret_p) |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 282 | { |
| 283 | struct acpi_device *device = NULL; |
| 284 | struct acpi_device_physical_node *pn; |
| 285 | |
| 286 | if (acpi_bus_get_device(handle, &device)) |
| 287 | return AE_OK; |
| 288 | |
| 289 | mutex_lock(&device->physical_node_lock); |
| 290 | |
| 291 | list_for_each_entry(pn, &device->physical_node_list, node) |
| 292 | if (pn->put_online) { |
| 293 | device_online(pn->dev); |
| 294 | pn->put_online = false; |
| 295 | } |
| 296 | |
| 297 | mutex_unlock(&device->physical_node_lock); |
| 298 | |
| 299 | return AE_OK; |
| 300 | } |
| 301 | |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 302 | static int acpi_scan_try_to_offline(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
Yinghai Lu | 5993c46 | 2013-01-11 22:40:41 +0000 | [diff] [blame] | 304 | acpi_handle handle = device->handle; |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 305 | struct device *errdev = NULL; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 306 | acpi_status status; |
Rafael J. Wysocki | f058cdf | 2013-02-09 15:29:11 +0100 | [diff] [blame] | 307 | |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 308 | /* |
| 309 | * Carry out two passes here and ignore errors in the first pass, |
| 310 | * because if the devices in question are memory blocks and |
| 311 | * CONFIG_MEMCG is set, one of the blocks may hold data structures |
| 312 | * that the other blocks depend on, but it is not known in advance which |
| 313 | * block holds them. |
| 314 | * |
| 315 | * If the first pass is successful, the second one isn't needed, though. |
| 316 | */ |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 317 | status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
| 318 | NULL, acpi_bus_offline, (void *)false, |
| 319 | (void **)&errdev); |
| 320 | if (status == AE_SUPPORT) { |
| 321 | dev_warn(errdev, "Offline disabled.\n"); |
| 322 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
| 323 | acpi_bus_online, NULL, NULL, NULL); |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 324 | return -EPERM; |
| 325 | } |
| 326 | acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev); |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 327 | if (errdev) { |
| 328 | errdev = NULL; |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 329 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 330 | NULL, acpi_bus_offline, (void *)true, |
| 331 | (void **)&errdev); |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 332 | if (!errdev || acpi_force_hot_remove) |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 333 | acpi_bus_offline(handle, 0, (void *)true, |
| 334 | (void **)&errdev); |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 335 | |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 336 | if (errdev && !acpi_force_hot_remove) { |
| 337 | dev_warn(errdev, "Offline failed.\n"); |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 338 | acpi_bus_online(handle, 0, NULL, NULL); |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 339 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, |
Rafael J. Wysocki | 7f28dde | 2013-11-07 01:41:14 +0100 | [diff] [blame] | 340 | ACPI_UINT32_MAX, acpi_bus_online, |
| 341 | NULL, NULL, NULL); |
Rafael J. Wysocki | 303bfdb | 2013-05-23 10:43:13 +0200 | [diff] [blame] | 342 | return -EBUSY; |
| 343 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 344 | } |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | static int acpi_scan_hot_remove(struct acpi_device *device) |
| 349 | { |
| 350 | acpi_handle handle = device->handle; |
| 351 | unsigned long long sta; |
| 352 | acpi_status status; |
| 353 | |
| 354 | if (device->handler->hotplug.demand_offline && !acpi_force_hot_remove) { |
Rafael J. Wysocki | caa73ea | 2013-12-29 15:25:48 +0100 | [diff] [blame] | 355 | if (!acpi_scan_is_offline(device, true)) |
Rafael J. Wysocki | d22ddcb | 2013-12-29 15:25:35 +0100 | [diff] [blame] | 356 | return -EBUSY; |
| 357 | } else { |
| 358 | int error = acpi_scan_try_to_offline(device); |
| 359 | if (error) |
| 360 | return error; |
| 361 | } |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 362 | |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 363 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 364 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 365 | |
Rafael J. Wysocki | bfee26d | 2013-01-26 00:27:44 +0100 | [diff] [blame] | 366 | acpi_bus_trim(device); |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 367 | |
Jiang Liu | 7d2421f | 2013-06-29 00:24:40 +0800 | [diff] [blame] | 368 | acpi_evaluate_lck(handle, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | /* |
| 370 | * TBD: _EJD support. |
| 371 | */ |
Jiang Liu | 7d2421f | 2013-06-29 00:24:40 +0800 | [diff] [blame] | 372 | status = acpi_evaluate_ej0(handle); |
| 373 | if (status == AE_NOT_FOUND) |
| 374 | return -ENODEV; |
| 375 | else if (ACPI_FAILURE(status)) |
| 376 | return -EIO; |
Rafael J. Wysocki | f058cdf | 2013-02-09 15:29:11 +0100 | [diff] [blame] | 377 | |
Toshi Kani | 882fd12 | 2013-03-13 19:29:26 +0000 | [diff] [blame] | 378 | /* |
| 379 | * Verify if eject was indeed successful. If not, log an error |
| 380 | * message. No need to call _OST since _EJ0 call was made OK. |
| 381 | */ |
| 382 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
| 383 | if (ACPI_FAILURE(status)) { |
| 384 | acpi_handle_warn(handle, |
| 385 | "Status check after eject failed (0x%x)\n", status); |
| 386 | } else if (sta & ACPI_STA_DEVICE_ENABLED) { |
| 387 | acpi_handle_warn(handle, |
| 388 | "Eject incomplete - status 0x%llx\n", sta); |
| 389 | } |
| 390 | |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 391 | return 0; |
| 392 | } |
Rafael J. Wysocki | f058cdf | 2013-02-09 15:29:11 +0100 | [diff] [blame] | 393 | |
Rafael J. Wysocki | 443fc82 | 2013-11-22 21:55:43 +0100 | [diff] [blame] | 394 | static int acpi_scan_device_not_present(struct acpi_device *adev) |
| 395 | { |
| 396 | if (!acpi_device_enumerated(adev)) { |
| 397 | dev_warn(&adev->dev, "Still not present\n"); |
| 398 | return -EALREADY; |
| 399 | } |
| 400 | acpi_bus_trim(adev); |
| 401 | return 0; |
| 402 | } |
| 403 | |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 404 | static int acpi_scan_device_check(struct acpi_device *adev) |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 405 | { |
Rafael J. Wysocki | f943db4 | 2013-08-28 21:41:07 +0200 | [diff] [blame] | 406 | int error; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 407 | |
Rafael J. Wysocki | 443fc82 | 2013-11-22 21:55:43 +0100 | [diff] [blame] | 408 | acpi_bus_get_status(adev); |
| 409 | if (adev->status.present || adev->status.functional) { |
| 410 | /* |
| 411 | * This function is only called for device objects for which |
| 412 | * matching scan handlers exist. The only situation in which |
| 413 | * the scan handler is not attached to this device object yet |
| 414 | * is when the device has just appeared (either it wasn't |
| 415 | * present at all before or it was removed and then added |
| 416 | * again). |
| 417 | */ |
| 418 | if (adev->handler) { |
| 419 | dev_warn(&adev->dev, "Already enumerated\n"); |
| 420 | return -EALREADY; |
| 421 | } |
| 422 | error = acpi_bus_scan(adev->handle); |
| 423 | if (error) { |
| 424 | dev_warn(&adev->dev, "Namespace scan failure\n"); |
| 425 | return error; |
| 426 | } |
| 427 | if (!adev->handler) { |
| 428 | dev_warn(&adev->dev, "Enumeration failure\n"); |
| 429 | error = -ENODEV; |
| 430 | } |
| 431 | } else { |
| 432 | error = acpi_scan_device_not_present(adev); |
| 433 | } |
| 434 | return error; |
| 435 | } |
| 436 | |
| 437 | static int acpi_scan_bus_check(struct acpi_device *adev) |
| 438 | { |
| 439 | struct acpi_scan_handler *handler = adev->handler; |
| 440 | struct acpi_device *child; |
| 441 | int error; |
| 442 | |
| 443 | acpi_bus_get_status(adev); |
| 444 | if (!(adev->status.present || adev->status.functional)) { |
| 445 | acpi_scan_device_not_present(adev); |
| 446 | return 0; |
| 447 | } |
| 448 | if (handler && handler->hotplug.scan_dependent) |
| 449 | return handler->hotplug.scan_dependent(adev); |
| 450 | |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 451 | error = acpi_bus_scan(adev->handle); |
| 452 | if (error) { |
| 453 | dev_warn(&adev->dev, "Namespace scan failure\n"); |
| 454 | return error; |
| 455 | } |
Rafael J. Wysocki | 443fc82 | 2013-11-22 21:55:43 +0100 | [diff] [blame] | 456 | list_for_each_entry(child, &adev->children, node) { |
| 457 | error = acpi_scan_bus_check(child); |
| 458 | if (error) |
| 459 | return error; |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 460 | } |
| 461 | return 0; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 462 | } |
| 463 | |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 464 | static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type) |
| 465 | { |
| 466 | switch (type) { |
| 467 | case ACPI_NOTIFY_BUS_CHECK: |
| 468 | return acpi_scan_bus_check(adev); |
| 469 | case ACPI_NOTIFY_DEVICE_CHECK: |
| 470 | return acpi_scan_device_check(adev); |
| 471 | case ACPI_NOTIFY_EJECT_REQUEST: |
| 472 | case ACPI_OST_EC_OSPM_EJECT: |
Rafael J. Wysocki | dd2151b | 2014-02-04 00:44:02 +0100 | [diff] [blame] | 473 | if (adev->handler && !adev->handler->hotplug.enabled) { |
| 474 | dev_info(&adev->dev, "Eject disabled\n"); |
| 475 | return -EPERM; |
| 476 | } |
Rafael J. Wysocki | 700b842 | 2014-02-21 01:07:17 +0100 | [diff] [blame] | 477 | acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST, |
| 478 | ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 479 | return acpi_scan_hot_remove(adev); |
| 480 | } |
| 481 | return -EINVAL; |
| 482 | } |
| 483 | |
Rafael J. Wysocki | 1e3bcb59 | 2014-03-03 00:40:38 +0100 | [diff] [blame] | 484 | void acpi_device_hotplug(struct acpi_device *adev, u32 src) |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 485 | { |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 486 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 487 | int error = -ENODEV; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 488 | |
Rafael J. Wysocki | 683058e | 2013-05-03 00:26:16 +0200 | [diff] [blame] | 489 | lock_device_hotplug(); |
Rafael J. Wysocki | e0ae8fe | 2013-08-30 14:19:29 +0200 | [diff] [blame] | 490 | mutex_lock(&acpi_scan_lock); |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 491 | |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 492 | /* |
| 493 | * 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] | 494 | * 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] | 495 | * that lock was acquired. |
| 496 | */ |
| 497 | if (adev->handle == INVALID_ACPI_HANDLE) |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 498 | goto err_out; |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 499 | |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 500 | if (adev->flags.is_dock_station) { |
| 501 | error = dock_notify(adev, src); |
| 502 | } else if (adev->flags.hotplug_notify) { |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 503 | error = acpi_generic_hotplug_event(adev, src); |
Rafael J. Wysocki | dd2151b | 2014-02-04 00:44:02 +0100 | [diff] [blame] | 504 | if (error == -EPERM) { |
| 505 | ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; |
| 506 | goto err_out; |
| 507 | } |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 508 | } else { |
Rafael J. Wysocki | be27b3d | 2014-02-21 01:10:27 +0100 | [diff] [blame] | 509 | int (*notify)(struct acpi_device *, u32); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 510 | |
| 511 | acpi_lock_hp_context(); |
Rafael J. Wysocki | be27b3d | 2014-02-21 01:10:27 +0100 | [diff] [blame] | 512 | notify = adev->hp ? adev->hp->notify : NULL; |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 513 | acpi_unlock_hp_context(); |
| 514 | /* |
| 515 | * There may be additional notify handlers for device objects |
| 516 | * without the .event() callback, so ignore them here. |
| 517 | */ |
Rafael J. Wysocki | be27b3d | 2014-02-21 01:10:27 +0100 | [diff] [blame] | 518 | if (notify) |
| 519 | error = notify(adev, src); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 520 | else |
| 521 | goto out; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 522 | } |
Rafael J. Wysocki | c27b2c3 | 2013-11-22 21:55:07 +0100 | [diff] [blame] | 523 | if (!error) |
| 524 | ost_code = ACPI_OST_SC_SUCCESS; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 525 | |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 526 | err_out: |
Rafael J. Wysocki | 700b842 | 2014-02-21 01:07:17 +0100 | [diff] [blame] | 527 | acpi_evaluate_ost(adev->handle, src, ost_code, NULL); |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 528 | |
| 529 | out: |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 530 | acpi_bus_put_acpi_device(adev); |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 531 | mutex_unlock(&acpi_scan_lock); |
Rafael J. Wysocki | e0ae8fe | 2013-08-30 14:19:29 +0200 | [diff] [blame] | 532 | unlock_device_hotplug(); |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 533 | } |
| 534 | |
Rafael J. Wysocki | 836aedb | 2013-01-24 12:49:59 +0100 | [diff] [blame] | 535 | static ssize_t real_power_state_show(struct device *dev, |
| 536 | struct device_attribute *attr, char *buf) |
| 537 | { |
| 538 | struct acpi_device *adev = to_acpi_device(dev); |
| 539 | int state; |
| 540 | int ret; |
| 541 | |
| 542 | ret = acpi_device_get_power(adev, &state); |
| 543 | if (ret) |
| 544 | return ret; |
| 545 | |
| 546 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); |
| 547 | } |
| 548 | |
| 549 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); |
| 550 | |
| 551 | static ssize_t power_state_show(struct device *dev, |
| 552 | struct device_attribute *attr, char *buf) |
| 553 | { |
| 554 | struct acpi_device *adev = to_acpi_device(dev); |
| 555 | |
| 556 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); |
| 557 | } |
| 558 | |
| 559 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); |
| 560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | static ssize_t |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 562 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
| 563 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 565 | struct acpi_device *acpi_device = to_acpi_device(d); |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 566 | acpi_object_type not_used; |
| 567 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 569 | if (!count || buf[0] != '1') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 572 | if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) |
| 573 | && !acpi_device->driver) |
| 574 | return -ENODEV; |
| 575 | |
| 576 | status = acpi_get_type(acpi_device->handle, ¬_used); |
| 577 | if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) |
| 578 | return -ENODEV; |
| 579 | |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 580 | get_device(&acpi_device->dev); |
Rafael J. Wysocki | 1e3bcb59 | 2014-03-03 00:40:38 +0100 | [diff] [blame] | 581 | status = acpi_hotplug_schedule(acpi_device, ACPI_OST_EC_OSPM_EJECT); |
Rafael J. Wysocki | f943db4 | 2013-08-28 21:41:07 +0200 | [diff] [blame] | 582 | if (ACPI_SUCCESS(status)) |
| 583 | return count; |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 584 | |
Rafael J. Wysocki | f943db4 | 2013-08-28 21:41:07 +0200 | [diff] [blame] | 585 | put_device(&acpi_device->dev); |
Rafael J. Wysocki | 700b842 | 2014-02-21 01:07:17 +0100 | [diff] [blame] | 586 | acpi_evaluate_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT, |
| 587 | ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); |
Rafael J. Wysocki | 5add99c | 2013-11-07 01:41:39 +0100 | [diff] [blame] | 588 | return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
| 590 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 591 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 593 | static ssize_t |
| 594 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 595 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
Bjorn Helgaas | ea8d82f | 2009-09-21 13:35:09 -0600 | [diff] [blame] | 597 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 598 | } |
| 599 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
| 600 | |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 601 | static ssize_t acpi_device_uid_show(struct device *dev, |
| 602 | struct device_attribute *attr, char *buf) |
| 603 | { |
| 604 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 605 | |
| 606 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); |
| 607 | } |
| 608 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); |
| 609 | |
| 610 | static ssize_t acpi_device_adr_show(struct device *dev, |
| 611 | struct device_attribute *attr, char *buf) |
| 612 | { |
| 613 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 614 | |
| 615 | return sprintf(buf, "0x%08x\n", |
| 616 | (unsigned int)(acpi_dev->pnp.bus_address)); |
| 617 | } |
| 618 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); |
| 619 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 620 | static ssize_t |
| 621 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 622 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 623 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 624 | int result; |
| 625 | |
| 626 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 627 | if (result) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 628 | goto end; |
| 629 | |
| 630 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
| 631 | kfree(path.pointer); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 632 | end: |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 633 | return result; |
| 634 | } |
| 635 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
| 636 | |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 637 | /* sysfs file that shows description text from the ACPI _STR method */ |
| 638 | static ssize_t description_show(struct device *dev, |
| 639 | struct device_attribute *attr, |
| 640 | char *buf) { |
| 641 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 642 | int result; |
| 643 | |
| 644 | if (acpi_dev->pnp.str_obj == NULL) |
| 645 | return 0; |
| 646 | |
| 647 | /* |
| 648 | * The _STR object contains a Unicode identifier for a device. |
| 649 | * We need to convert to utf-8 so it can be displayed. |
| 650 | */ |
| 651 | result = utf16s_to_utf8s( |
| 652 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, |
| 653 | acpi_dev->pnp.str_obj->buffer.length, |
| 654 | UTF16_LITTLE_ENDIAN, buf, |
| 655 | PAGE_SIZE); |
| 656 | |
| 657 | buf[result++] = '\n'; |
| 658 | |
| 659 | return result; |
| 660 | } |
| 661 | static DEVICE_ATTR(description, 0444, description_show, NULL); |
| 662 | |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 663 | static ssize_t |
| 664 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, |
| 665 | char *buf) { |
| 666 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 667 | |
| 668 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); |
| 669 | } |
| 670 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); |
| 671 | |
Srinivas Pandruvada | c713cd7 | 2014-01-10 16:00:05 -0800 | [diff] [blame] | 672 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
| 673 | char *buf) { |
| 674 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 675 | acpi_status status; |
| 676 | unsigned long long sta; |
| 677 | |
| 678 | status = acpi_evaluate_integer(acpi_dev->handle, "_STA", NULL, &sta); |
| 679 | if (ACPI_FAILURE(status)) |
| 680 | return -ENODEV; |
| 681 | |
| 682 | return sprintf(buf, "%llu\n", sta); |
| 683 | } |
| 684 | static DEVICE_ATTR_RO(status); |
| 685 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 686 | static int acpi_device_setup_files(struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | { |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 688 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 689 | acpi_status status; |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 690 | unsigned long long sun; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 691 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 693 | /* |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 694 | * Devices gotten from FADT don't have a "path" attribute |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 695 | */ |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 696 | if (dev->handle) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 697 | result = device_create_file(&dev->dev, &dev_attr_path); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 698 | if (result) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 699 | goto end; |
| 700 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 702 | if (!list_empty(&dev->pnp.ids)) { |
| 703 | result = device_create_file(&dev->dev, &dev_attr_hid); |
| 704 | if (result) |
| 705 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 707 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
| 708 | if (result) |
| 709 | goto end; |
| 710 | } |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 711 | |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 712 | /* |
| 713 | * If device has _STR, 'description' file is created |
| 714 | */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 715 | if (acpi_has_method(dev->handle, "_STR")) { |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 716 | status = acpi_evaluate_object(dev->handle, "_STR", |
| 717 | NULL, &buffer); |
| 718 | if (ACPI_FAILURE(status)) |
| 719 | buffer.pointer = NULL; |
| 720 | dev->pnp.str_obj = buffer.pointer; |
| 721 | result = device_create_file(&dev->dev, &dev_attr_description); |
| 722 | if (result) |
| 723 | goto end; |
| 724 | } |
| 725 | |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 726 | if (dev->pnp.type.bus_address) |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 727 | result = device_create_file(&dev->dev, &dev_attr_adr); |
| 728 | if (dev->pnp.unique_id) |
| 729 | result = device_create_file(&dev->dev, &dev_attr_uid); |
| 730 | |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 731 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
| 732 | if (ACPI_SUCCESS(status)) { |
| 733 | dev->pnp.sun = (unsigned long)sun; |
| 734 | result = device_create_file(&dev->dev, &dev_attr_sun); |
| 735 | if (result) |
| 736 | goto end; |
| 737 | } else { |
| 738 | dev->pnp.sun = (unsigned long)-1; |
| 739 | } |
| 740 | |
Srinivas Pandruvada | c713cd7 | 2014-01-10 16:00:05 -0800 | [diff] [blame] | 741 | if (acpi_has_method(dev->handle, "_STA")) { |
| 742 | result = device_create_file(&dev->dev, &dev_attr_status); |
| 743 | if (result) |
| 744 | goto end; |
| 745 | } |
| 746 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 747 | /* |
| 748 | * If device has _EJ0, 'eject' file is created that is used to trigger |
| 749 | * hot-removal function from userland. |
| 750 | */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 751 | if (acpi_has_method(dev->handle, "_EJ0")) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 752 | result = device_create_file(&dev->dev, &dev_attr_eject); |
Rafael J. Wysocki | 836aedb | 2013-01-24 12:49:59 +0100 | [diff] [blame] | 753 | if (result) |
| 754 | return result; |
| 755 | } |
| 756 | |
| 757 | if (dev->flags.power_manageable) { |
| 758 | result = device_create_file(&dev->dev, &dev_attr_power_state); |
| 759 | if (result) |
| 760 | return result; |
| 761 | |
| 762 | if (dev->power.flags.power_resources) |
| 763 | result = device_create_file(&dev->dev, |
| 764 | &dev_attr_real_power_state); |
| 765 | } |
| 766 | |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 767 | end: |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 768 | return result; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 769 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 771 | static void acpi_device_remove_files(struct acpi_device *dev) |
| 772 | { |
Rafael J. Wysocki | 836aedb | 2013-01-24 12:49:59 +0100 | [diff] [blame] | 773 | if (dev->flags.power_manageable) { |
| 774 | device_remove_file(&dev->dev, &dev_attr_power_state); |
| 775 | if (dev->power.flags.power_resources) |
| 776 | device_remove_file(&dev->dev, |
| 777 | &dev_attr_real_power_state); |
| 778 | } |
| 779 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 780 | /* |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 781 | * If device has _STR, remove 'description' file |
| 782 | */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 783 | if (acpi_has_method(dev->handle, "_STR")) { |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 784 | kfree(dev->pnp.str_obj); |
| 785 | device_remove_file(&dev->dev, &dev_attr_description); |
| 786 | } |
| 787 | /* |
| 788 | * If device has _EJ0, remove 'eject' file. |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 789 | */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 790 | if (acpi_has_method(dev->handle, "_EJ0")) |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 791 | device_remove_file(&dev->dev, &dev_attr_eject); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 792 | |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 793 | if (acpi_has_method(dev->handle, "_SUN")) |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 794 | device_remove_file(&dev->dev, &dev_attr_sun); |
| 795 | |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 796 | if (dev->pnp.unique_id) |
| 797 | device_remove_file(&dev->dev, &dev_attr_uid); |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 798 | if (dev->pnp.type.bus_address) |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 799 | device_remove_file(&dev->dev, &dev_attr_adr); |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 800 | device_remove_file(&dev->dev, &dev_attr_modalias); |
| 801 | device_remove_file(&dev->dev, &dev_attr_hid); |
Srinivas Pandruvada | c713cd7 | 2014-01-10 16:00:05 -0800 | [diff] [blame] | 802 | if (acpi_has_method(dev->handle, "_STA")) |
| 803 | device_remove_file(&dev->dev, &dev_attr_status); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 804 | if (dev->handle) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 805 | device_remove_file(&dev->dev, &dev_attr_path); |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 806 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | /* -------------------------------------------------------------------------- |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 808 | ACPI Bus operations |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | -------------------------------------------------------------------------- */ |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 810 | |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 811 | static const struct acpi_device_id *__acpi_match_device( |
| 812 | struct acpi_device *device, const struct acpi_device_id *ids) |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 813 | { |
| 814 | const struct acpi_device_id *id; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 815 | struct acpi_hardware_id *hwid; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 816 | |
Zhao Yakui | 39a0ad8 | 2008-08-11 13:40:22 +0800 | [diff] [blame] | 817 | /* |
| 818 | * If the device is not present, it is unnecessary to load device |
| 819 | * driver for it. |
| 820 | */ |
| 821 | if (!device->status.present) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 822 | return NULL; |
Zhao Yakui | 39a0ad8 | 2008-08-11 13:40:22 +0800 | [diff] [blame] | 823 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 824 | for (id = ids; id->id[0]; id++) |
| 825 | list_for_each_entry(hwid, &device->pnp.ids, list) |
| 826 | if (!strcmp((char *) id->id, hwid->id)) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 827 | return id; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 828 | |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 829 | return NULL; |
| 830 | } |
| 831 | |
| 832 | /** |
| 833 | * acpi_match_device - Match a struct device against a given list of ACPI IDs |
| 834 | * @ids: Array of struct acpi_device_id object to match against. |
| 835 | * @dev: The device structure to match. |
| 836 | * |
| 837 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device |
| 838 | * object for that handle and use that object to match against a given list of |
| 839 | * device IDs. |
| 840 | * |
| 841 | * Return a pointer to the first matching ID on success or %NULL on failure. |
| 842 | */ |
| 843 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, |
| 844 | const struct device *dev) |
| 845 | { |
| 846 | struct acpi_device *adev; |
Rafael J. Wysocki | 0613e1f | 2013-01-31 20:54:05 +0100 | [diff] [blame] | 847 | acpi_handle handle = ACPI_HANDLE(dev); |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 848 | |
Rafael J. Wysocki | 0613e1f | 2013-01-31 20:54:05 +0100 | [diff] [blame] | 849 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 850 | return NULL; |
| 851 | |
| 852 | return __acpi_match_device(adev, ids); |
| 853 | } |
| 854 | EXPORT_SYMBOL_GPL(acpi_match_device); |
| 855 | |
| 856 | int acpi_match_device_ids(struct acpi_device *device, |
| 857 | const struct acpi_device_id *ids) |
| 858 | { |
| 859 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 860 | } |
| 861 | EXPORT_SYMBOL(acpi_match_device_ids); |
| 862 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 863 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
| 864 | { |
| 865 | int i; |
| 866 | |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 867 | if (device->wakeup.flags.valid) |
| 868 | acpi_power_resources_list_free(&device->wakeup.resources); |
| 869 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 870 | if (!device->flags.power_manageable) |
| 871 | return; |
| 872 | |
| 873 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
| 874 | struct acpi_device_power_state *ps = &device->power.states[i]; |
| 875 | acpi_power_resources_list_free(&ps->resources); |
| 876 | } |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 877 | } |
| 878 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 879 | static void acpi_device_release(struct device *dev) |
| 880 | { |
| 881 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 882 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 883 | acpi_free_pnp_ids(&acpi_dev->pnp); |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 884 | acpi_free_power_resources_lists(acpi_dev); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 885 | kfree(acpi_dev); |
| 886 | } |
| 887 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 888 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
| 889 | { |
| 890 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 891 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); |
| 892 | |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 893 | return acpi_dev->flags.match_driver |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 894 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 895 | } |
| 896 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 897 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 898 | { |
| 899 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 900 | int len; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 901 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 902 | if (list_empty(&acpi_dev->pnp.ids)) |
| 903 | return 0; |
| 904 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 905 | if (add_uevent_var(env, "MODALIAS=")) |
| 906 | return -ENOMEM; |
| 907 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], |
| 908 | sizeof(env->buf) - env->buflen); |
Zhang Rui | 3d8e009 | 2014-01-14 16:46:35 +0800 | [diff] [blame] | 909 | if (len <= 0) |
| 910 | return len; |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 911 | env->buflen += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | return 0; |
| 913 | } |
| 914 | |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 915 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
| 916 | { |
| 917 | struct acpi_device *device = data; |
| 918 | |
| 919 | device->driver->ops.notify(device, event); |
| 920 | } |
| 921 | |
| 922 | static acpi_status acpi_device_notify_fixed(void *data) |
| 923 | { |
| 924 | struct acpi_device *device = data; |
| 925 | |
Bjorn Helgaas | 53de535 | 2009-08-31 22:32:20 +0000 | [diff] [blame] | 926 | /* Fixed hardware devices have no handles */ |
| 927 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 928 | return AE_OK; |
| 929 | } |
| 930 | |
| 931 | static int acpi_device_install_notify_handler(struct acpi_device *device) |
| 932 | { |
| 933 | acpi_status status; |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 934 | |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 935 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 936 | status = |
| 937 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
| 938 | acpi_device_notify_fixed, |
| 939 | device); |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 940 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 941 | status = |
| 942 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
| 943 | acpi_device_notify_fixed, |
| 944 | device); |
| 945 | else |
| 946 | status = acpi_install_notify_handler(device->handle, |
| 947 | ACPI_DEVICE_NOTIFY, |
| 948 | acpi_device_notify, |
| 949 | device); |
| 950 | |
| 951 | if (ACPI_FAILURE(status)) |
| 952 | return -EINVAL; |
| 953 | return 0; |
| 954 | } |
| 955 | |
| 956 | static void acpi_device_remove_notify_handler(struct acpi_device *device) |
| 957 | { |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 958 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 959 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
| 960 | acpi_device_notify_fixed); |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 961 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 962 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
| 963 | acpi_device_notify_fixed); |
| 964 | else |
| 965 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
| 966 | acpi_device_notify); |
| 967 | } |
| 968 | |
Rafael J. Wysocki | d9e455f | 2013-06-10 13:00:50 +0200 | [diff] [blame] | 969 | static int acpi_device_probe(struct device *dev) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 970 | { |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 971 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 972 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); |
| 973 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
Rafael J. Wysocki | 24071f4 | 2013-06-16 00:36:41 +0200 | [diff] [blame] | 975 | if (acpi_dev->handler) |
| 976 | return -EINVAL; |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 977 | |
Rafael J. Wysocki | d9e455f | 2013-06-10 13:00:50 +0200 | [diff] [blame] | 978 | if (!acpi_drv->ops.add) |
| 979 | return -ENOSYS; |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 980 | |
Rafael J. Wysocki | d9e455f | 2013-06-10 13:00:50 +0200 | [diff] [blame] | 981 | ret = acpi_drv->ops.add(acpi_dev); |
| 982 | if (ret) |
| 983 | return ret; |
| 984 | |
| 985 | acpi_dev->driver = acpi_drv; |
| 986 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 987 | "Driver [%s] successfully bound to device [%s]\n", |
| 988 | acpi_drv->name, acpi_dev->pnp.bus_id)); |
| 989 | |
| 990 | if (acpi_drv->ops.notify) { |
| 991 | ret = acpi_device_install_notify_handler(acpi_dev); |
| 992 | if (ret) { |
| 993 | if (acpi_drv->ops.remove) |
| 994 | acpi_drv->ops.remove(acpi_dev); |
| 995 | |
| 996 | acpi_dev->driver = NULL; |
| 997 | acpi_dev->driver_data = NULL; |
| 998 | return ret; |
| 999 | } |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1000 | } |
Rafael J. Wysocki | d9e455f | 2013-06-10 13:00:50 +0200 | [diff] [blame] | 1001 | |
| 1002 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", |
| 1003 | acpi_drv->name, acpi_dev->pnp.bus_id)); |
| 1004 | get_device(dev); |
| 1005 | return 0; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 1006 | } |
| 1007 | |
| 1008 | static int acpi_device_remove(struct device * dev) |
| 1009 | { |
| 1010 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 1011 | struct acpi_driver *acpi_drv = acpi_dev->driver; |
| 1012 | |
| 1013 | if (acpi_drv) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 1014 | if (acpi_drv->ops.notify) |
| 1015 | acpi_device_remove_notify_handler(acpi_dev); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 1016 | if (acpi_drv->ops.remove) |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 1017 | acpi_drv->ops.remove(acpi_dev); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 1018 | } |
| 1019 | acpi_dev->driver = NULL; |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 1020 | acpi_dev->driver_data = NULL; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 1021 | |
| 1022 | put_device(dev); |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1023 | return 0; |
| 1024 | } |
| 1025 | |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 1026 | struct bus_type acpi_bus_type = { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1027 | .name = "acpi", |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 1028 | .match = acpi_bus_match, |
| 1029 | .probe = acpi_device_probe, |
| 1030 | .remove = acpi_device_remove, |
| 1031 | .uevent = acpi_device_uevent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | }; |
| 1033 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 1034 | static void acpi_device_del(struct acpi_device *device) |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 1035 | { |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 1036 | mutex_lock(&acpi_device_lock); |
| 1037 | if (device->parent) |
| 1038 | list_del(&device->node); |
| 1039 | |
| 1040 | list_del(&device->wakeup_list); |
| 1041 | mutex_unlock(&acpi_device_lock); |
| 1042 | |
| 1043 | acpi_power_add_remove_device(device, false); |
| 1044 | acpi_device_remove_files(device); |
| 1045 | if (device->remove) |
| 1046 | device->remove(device); |
| 1047 | |
| 1048 | device_del(&device->dev); |
| 1049 | } |
| 1050 | |
| 1051 | static LIST_HEAD(acpi_device_del_list); |
| 1052 | static DEFINE_MUTEX(acpi_device_del_lock); |
| 1053 | |
| 1054 | static void acpi_device_del_work_fn(struct work_struct *work_not_used) |
| 1055 | { |
| 1056 | for (;;) { |
| 1057 | struct acpi_device *adev; |
| 1058 | |
| 1059 | mutex_lock(&acpi_device_del_lock); |
| 1060 | |
| 1061 | if (list_empty(&acpi_device_del_list)) { |
| 1062 | mutex_unlock(&acpi_device_del_lock); |
| 1063 | break; |
| 1064 | } |
| 1065 | adev = list_first_entry(&acpi_device_del_list, |
| 1066 | struct acpi_device, del_list); |
| 1067 | list_del(&adev->del_list); |
| 1068 | |
| 1069 | mutex_unlock(&acpi_device_del_lock); |
| 1070 | |
| 1071 | acpi_device_del(adev); |
| 1072 | /* |
| 1073 | * Drop references to all power resources that might have been |
| 1074 | * used by the device. |
| 1075 | */ |
| 1076 | acpi_power_transition(adev, ACPI_STATE_D3_COLD); |
| 1077 | put_device(&adev->dev); |
| 1078 | } |
| 1079 | } |
| 1080 | |
| 1081 | /** |
| 1082 | * acpi_scan_drop_device - Drop an ACPI device object. |
| 1083 | * @handle: Handle of an ACPI namespace node, not used. |
| 1084 | * @context: Address of the ACPI device object to drop. |
| 1085 | * |
| 1086 | * This is invoked by acpi_ns_delete_node() during the removal of the ACPI |
| 1087 | * namespace node the device object pointed to by @context is attached to. |
| 1088 | * |
| 1089 | * The unregistration is carried out asynchronously to avoid running |
| 1090 | * acpi_device_del() under the ACPICA's namespace mutex and the list is used to |
| 1091 | * ensure the correct ordering (the device objects must be unregistered in the |
| 1092 | * same order in which the corresponding namespace nodes are deleted). |
| 1093 | */ |
| 1094 | static void acpi_scan_drop_device(acpi_handle handle, void *context) |
| 1095 | { |
| 1096 | static DECLARE_WORK(work, acpi_device_del_work_fn); |
| 1097 | struct acpi_device *adev = context; |
| 1098 | |
| 1099 | mutex_lock(&acpi_device_del_lock); |
| 1100 | |
| 1101 | /* |
| 1102 | * Use the ACPI hotplug workqueue which is ordered, so this work item |
| 1103 | * won't run after any hotplug work items submitted subsequently. That |
| 1104 | * prevents attempts to register device objects identical to those being |
| 1105 | * deleted from happening concurrently (such attempts result from |
| 1106 | * hotplug events handled via the ACPI hotplug workqueue). It also will |
| 1107 | * run after all of the work items submitted previosuly, which helps |
| 1108 | * those work items to ensure that they are not accessing stale device |
| 1109 | * objects. |
| 1110 | */ |
| 1111 | if (list_empty(&acpi_device_del_list)) |
| 1112 | acpi_queue_hotplug_work(&work); |
| 1113 | |
| 1114 | list_add_tail(&adev->del_list, &acpi_device_del_list); |
| 1115 | /* Make acpi_ns_validate_handle() return NULL for this handle. */ |
| 1116 | adev->handle = INVALID_ACPI_HANDLE; |
| 1117 | |
| 1118 | mutex_unlock(&acpi_device_del_lock); |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 1119 | } |
| 1120 | |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 1121 | static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device, |
| 1122 | void (*callback)(void *)) |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 1123 | { |
| 1124 | acpi_status status; |
| 1125 | |
| 1126 | if (!device) |
| 1127 | return -EINVAL; |
| 1128 | |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 1129 | status = acpi_get_data_full(handle, acpi_scan_drop_device, |
| 1130 | (void **)device, callback); |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 1131 | if (ACPI_FAILURE(status) || !*device) { |
| 1132 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
| 1133 | handle)); |
| 1134 | return -ENODEV; |
| 1135 | } |
| 1136 | return 0; |
| 1137 | } |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 1138 | |
| 1139 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
| 1140 | { |
| 1141 | return acpi_get_device_data(handle, device, NULL); |
| 1142 | } |
Rafael J. Wysocki | 6585925 | 2013-10-01 23:02:43 +0200 | [diff] [blame] | 1143 | EXPORT_SYMBOL(acpi_bus_get_device); |
Rafael J. Wysocki | caf5c03 | 2013-07-30 14:38:34 +0200 | [diff] [blame] | 1144 | |
Rafael J. Wysocki | 78ea463 | 2014-02-04 00:43:05 +0100 | [diff] [blame] | 1145 | static void get_acpi_device(void *dev) |
| 1146 | { |
| 1147 | if (dev) |
| 1148 | get_device(&((struct acpi_device *)dev)->dev); |
| 1149 | } |
| 1150 | |
| 1151 | struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle) |
| 1152 | { |
| 1153 | struct acpi_device *adev = NULL; |
| 1154 | |
| 1155 | acpi_get_device_data(handle, &adev, get_acpi_device); |
| 1156 | return adev; |
| 1157 | } |
| 1158 | |
| 1159 | void acpi_bus_put_acpi_device(struct acpi_device *adev) |
| 1160 | { |
| 1161 | put_device(&adev->dev); |
| 1162 | } |
| 1163 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1164 | int acpi_device_add(struct acpi_device *device, |
| 1165 | void (*release)(struct device *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1167 | int result; |
| 1168 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
| 1169 | int found = 0; |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1170 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1171 | if (device->handle) { |
| 1172 | acpi_status status; |
| 1173 | |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 1174 | status = acpi_attach_data(device->handle, acpi_scan_drop_device, |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1175 | device); |
| 1176 | if (ACPI_FAILURE(status)) { |
| 1177 | acpi_handle_err(device->handle, |
| 1178 | "Unable to attach device data\n"); |
| 1179 | return -ENODEV; |
| 1180 | } |
| 1181 | } |
| 1182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | /* |
| 1184 | * Linkage |
| 1185 | * ------- |
| 1186 | * Link this device to its parent and siblings. |
| 1187 | */ |
| 1188 | INIT_LIST_HEAD(&device->children); |
| 1189 | INIT_LIST_HEAD(&device->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | INIT_LIST_HEAD(&device->wakeup_list); |
Lan Tianyu | 1033f90 | 2012-08-17 14:44:09 +0800 | [diff] [blame] | 1191 | INIT_LIST_HEAD(&device->physical_node_list); |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 1192 | INIT_LIST_HEAD(&device->del_list); |
Lan Tianyu | 1033f90 | 2012-08-17 14:44:09 +0800 | [diff] [blame] | 1193 | mutex_init(&device->physical_node_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1195 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
| 1196 | if (!new_bus_id) { |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1197 | pr_err(PREFIX "Memory allocation error\n"); |
| 1198 | result = -ENOMEM; |
| 1199 | goto err_detach; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1200 | } |
| 1201 | |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 1202 | mutex_lock(&acpi_device_lock); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1203 | /* |
| 1204 | * Find suitable bus_id and instance number in acpi_bus_id_list |
| 1205 | * If failed, create one and link it into acpi_bus_id_list |
| 1206 | */ |
| 1207 | 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] | 1208 | if (!strcmp(acpi_device_bus_id->bus_id, |
| 1209 | acpi_device_hid(device))) { |
| 1210 | acpi_device_bus_id->instance_no++; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1211 | found = 1; |
| 1212 | kfree(new_bus_id); |
| 1213 | break; |
| 1214 | } |
| 1215 | } |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 1216 | if (!found) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1217 | acpi_device_bus_id = new_bus_id; |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 1218 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1219 | acpi_device_bus_id->instance_no = 0; |
| 1220 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); |
| 1221 | } |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 1222 | 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] | 1223 | |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 1224 | if (device->parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | list_add_tail(&device->node, &device->parent->children); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 1226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | if (device->wakeup.flags.valid) |
| 1228 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 1229 | mutex_unlock(&acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 1231 | if (device->parent) |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1232 | device->dev.parent = &device->parent->dev; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 1233 | device->dev.bus = &acpi_bus_type; |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1234 | device->dev.release = release; |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1235 | result = device_add(&device->dev); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 1236 | if (result) { |
Alex Chiang | 8b12b92 | 2009-05-14 08:31:32 -0600 | [diff] [blame] | 1237 | dev_err(&device->dev, "Error registering device\n"); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1238 | goto err; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1239 | } |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 1240 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1241 | result = acpi_device_setup_files(device); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 1242 | if (result) |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 1243 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
| 1244 | dev_name(&device->dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1245 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1246 | return 0; |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1247 | |
| 1248 | err: |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 1249 | mutex_lock(&acpi_device_lock); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 1250 | if (device->parent) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1251 | list_del(&device->node); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1252 | list_del(&device->wakeup_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 1253 | mutex_unlock(&acpi_device_lock); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1254 | |
| 1255 | err_detach: |
Rafael J. Wysocki | d783156 | 2013-11-22 21:52:12 +0100 | [diff] [blame] | 1256 | acpi_detach_data(device->handle, acpi_scan_drop_device); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 1257 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | } |
| 1259 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1260 | /* -------------------------------------------------------------------------- |
| 1261 | Driver Management |
| 1262 | -------------------------------------------------------------------------- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 1264 | * acpi_bus_register_driver - register a driver with the ACPI bus |
| 1265 | * @driver: driver being registered |
| 1266 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | * Registers a driver with the ACPI bus. Searches the namespace for all |
Bjorn Helgaas | 9d9f749 | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 1268 | * devices that match the driver's criteria and binds. Returns zero for |
| 1269 | * success or a negative error status for failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1271 | int acpi_bus_register_driver(struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | { |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 1273 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | |
| 1275 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1276 | return -ENODEV; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 1277 | driver->drv.name = driver->name; |
| 1278 | driver->drv.bus = &acpi_bus_type; |
| 1279 | driver->drv.owner = driver->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 1281 | ret = driver_register(&driver->drv); |
| 1282 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1285 | EXPORT_SYMBOL(acpi_bus_register_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | |
| 1287 | /** |
Hanjun Guo | b27b14c | 2013-09-22 15:42:41 +0800 | [diff] [blame] | 1288 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 1289 | * @driver: driver to unregister |
| 1290 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | * Unregisters a driver with the ACPI bus. Searches the namespace for all |
| 1292 | * devices that match the driver's criteria and unbinds. |
| 1293 | */ |
Bjorn Helgaas | 06ea8e08 | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 1294 | void acpi_bus_unregister_driver(struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | { |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 1296 | driver_unregister(&driver->drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | EXPORT_SYMBOL(acpi_bus_unregister_driver); |
| 1300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | /* -------------------------------------------------------------------------- |
| 1302 | Device Enumeration |
| 1303 | -------------------------------------------------------------------------- */ |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1304 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
| 1305 | { |
Rafael J. Wysocki | 456de89 | 2013-01-31 20:57:40 +0100 | [diff] [blame] | 1306 | struct acpi_device *device = NULL; |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1307 | acpi_status status; |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1308 | |
| 1309 | /* |
| 1310 | * Fixed hardware devices do not appear in the namespace and do not |
| 1311 | * have handles, but we fabricate acpi_devices for them, so we have |
| 1312 | * to deal with them specially. |
| 1313 | */ |
Rafael J. Wysocki | 456de89 | 2013-01-31 20:57:40 +0100 | [diff] [blame] | 1314 | if (!handle) |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1315 | return acpi_root; |
| 1316 | |
| 1317 | do { |
| 1318 | status = acpi_get_parent(handle, &handle); |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1319 | if (ACPI_FAILURE(status)) |
Rafael J. Wysocki | 456de89 | 2013-01-31 20:57:40 +0100 | [diff] [blame] | 1320 | return status == AE_NULL_ENTRY ? NULL : acpi_root; |
| 1321 | } while (acpi_bus_get_device(handle, &device)); |
| 1322 | return device; |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1323 | } |
| 1324 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1325 | acpi_status |
| 1326 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) |
| 1327 | { |
| 1328 | acpi_status status; |
| 1329 | acpi_handle tmp; |
| 1330 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 1331 | union acpi_object *obj; |
| 1332 | |
| 1333 | status = acpi_get_handle(handle, "_EJD", &tmp); |
| 1334 | if (ACPI_FAILURE(status)) |
| 1335 | return status; |
| 1336 | |
| 1337 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); |
| 1338 | if (ACPI_SUCCESS(status)) { |
| 1339 | obj = buffer.pointer; |
Holger Macht | 3b5fee5 | 2008-02-14 13:40:34 +0100 | [diff] [blame] | 1340 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
| 1341 | ejd); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 1342 | kfree(buffer.pointer); |
| 1343 | } |
| 1344 | return status; |
| 1345 | } |
| 1346 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); |
| 1347 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1348 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
| 1349 | struct acpi_device_wakeup *wakeup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1351 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 1352 | union acpi_object *package = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | union acpi_object *element = NULL; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1354 | acpi_status status; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1355 | int err = -ENODATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1357 | if (!wakeup) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1358 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1360 | INIT_LIST_HEAD(&wakeup->resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1362 | /* _PRW */ |
| 1363 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); |
| 1364 | if (ACPI_FAILURE(status)) { |
| 1365 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1366 | return err; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1367 | } |
| 1368 | |
| 1369 | package = (union acpi_object *)buffer.pointer; |
| 1370 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1371 | if (!package || package->package.count < 2) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1372 | goto out; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | element = &(package->package.elements[0]); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1375 | if (!element) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1376 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | if (element->type == ACPI_TYPE_PACKAGE) { |
| 1379 | if ((element->package.count < 2) || |
| 1380 | (element->package.elements[0].type != |
| 1381 | ACPI_TYPE_LOCAL_REFERENCE) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1382 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1383 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1384 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1385 | wakeup->gpe_device = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | element->package.elements[0].reference.handle; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1387 | wakeup->gpe_number = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | (u32) element->package.elements[1].integer.value; |
| 1389 | } else if (element->type == ACPI_TYPE_INTEGER) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1390 | wakeup->gpe_device = NULL; |
| 1391 | wakeup->gpe_number = element->integer.value; |
| 1392 | } else { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1393 | goto out; |
| 1394 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | |
| 1396 | element = &(package->package.elements[1]); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1397 | if (element->type != ACPI_TYPE_INTEGER) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1398 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1399 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1400 | wakeup->sleep_state = element->integer.value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1402 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
| 1403 | if (err) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1404 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1406 | if (!list_empty(&wakeup->resources)) { |
| 1407 | int sleep_state; |
| 1408 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 1409 | err = acpi_power_wakeup_list_init(&wakeup->resources, |
| 1410 | &sleep_state); |
| 1411 | if (err) { |
| 1412 | acpi_handle_warn(handle, "Retrieving current states " |
| 1413 | "of wakeup power resources failed\n"); |
| 1414 | acpi_power_resources_list_free(&wakeup->resources); |
| 1415 | goto out; |
| 1416 | } |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1417 | if (sleep_state < wakeup->sleep_state) { |
| 1418 | acpi_handle_warn(handle, "Overriding _PRW sleep state " |
| 1419 | "(S%d) by S%d from power resources\n", |
| 1420 | (int)wakeup->sleep_state, sleep_state); |
| 1421 | wakeup->sleep_state = sleep_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | } |
Lin Ming | bba63a2 | 2010-12-13 13:39:17 +0800 | [diff] [blame] | 1424 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
Rafael J. Wysocki | 9874647 | 2010-07-08 00:43:36 +0200 | [diff] [blame] | 1425 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1426 | out: |
| 1427 | kfree(buffer.pointer); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1428 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | } |
| 1430 | |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1431 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 1433 | struct acpi_device_id button_device_ids[] = { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 1434 | {"PNP0C0C", 0}, |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 1435 | {"PNP0C0D", 0}, |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 1436 | {"PNP0C0E", 0}, |
| 1437 | {"", 0}, |
| 1438 | }; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1439 | acpi_status status; |
| 1440 | acpi_event_status event_status; |
| 1441 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 1442 | device->wakeup.flags.notifier_present = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1443 | |
| 1444 | /* Power button, Lid switch always enable wakeup */ |
| 1445 | if (!acpi_match_device_ids(device, button_device_ids)) { |
| 1446 | device->wakeup.flags.run_wake = 1; |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 1447 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
| 1448 | /* Do not use Lid/sleep button for S5 wakeup */ |
| 1449 | if (device->wakeup.sleep_state == ACPI_STATE_S5) |
| 1450 | device->wakeup.sleep_state = ACPI_STATE_S4; |
| 1451 | } |
Rafael J. Wysocki | f2b56bc | 2011-01-06 23:34:22 +0100 | [diff] [blame] | 1452 | device_set_wakeup_capable(&device->dev, true); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1453 | return; |
| 1454 | } |
| 1455 | |
Rafael J. Wysocki | e8e18c9 | 2010-07-08 00:42:51 +0200 | [diff] [blame] | 1456 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
| 1457 | device->wakeup.gpe_number, |
| 1458 | &event_status); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1459 | if (status == AE_OK) |
| 1460 | device->wakeup.flags.run_wake = |
| 1461 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); |
| 1462 | } |
| 1463 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1464 | 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] | 1465 | { |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1466 | int err; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 1467 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1468 | /* Presence of _PRW indicates wake capable */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1469 | if (!acpi_has_method(device->handle, "_PRW")) |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1470 | return; |
| 1471 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1472 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
| 1473 | &device->wakeup); |
| 1474 | if (err) { |
| 1475 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1476 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | } |
| 1478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | device->wakeup.flags.valid = 1; |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 1480 | device->wakeup.prepare_count = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1481 | acpi_bus_set_run_wake_flags(device); |
Zhao Yakui | 729b2bd | 2008-03-19 13:26:54 +0800 | [diff] [blame] | 1482 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
| 1483 | * system for the ACPI device with the _PRW object. |
| 1484 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. |
| 1485 | * So it is necessary to call _DSW object first. Only when it is not |
| 1486 | * present will the _PSW object used. |
| 1487 | */ |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1488 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
| 1489 | if (err) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 1490 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 1491 | "error in _DSW or _PSW evaluation\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | } |
| 1493 | |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1494 | 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] | 1495 | { |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1496 | struct acpi_device_power_state *ps = &device->power.states[state]; |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1497 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
| 1498 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1499 | acpi_status status; |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1500 | |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1501 | INIT_LIST_HEAD(&ps->resources); |
| 1502 | |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1503 | /* Evaluate "_PRx" to get referenced power resources */ |
| 1504 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); |
| 1505 | if (ACPI_SUCCESS(status)) { |
| 1506 | union acpi_object *package = buffer.pointer; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1507 | |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1508 | if (buffer.length && package |
| 1509 | && package->type == ACPI_TYPE_PACKAGE |
| 1510 | && package->package.count) { |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1511 | int err = acpi_extract_power_resources(package, 0, |
| 1512 | &ps->resources); |
| 1513 | if (!err) |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1514 | device->power.flags.power_resources = 1; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1515 | } |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1516 | ACPI_FREE(buffer.pointer); |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1517 | } |
| 1518 | |
| 1519 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1520 | pathname[2] = 'S'; |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1521 | if (acpi_has_method(device->handle, pathname)) |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1522 | ps->flags.explicit_set = 1; |
| 1523 | |
| 1524 | /* |
| 1525 | * State is valid if there are means to put the device into it. |
| 1526 | * D3hot is only valid if _PR3 present. |
| 1527 | */ |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1528 | if (!list_empty(&ps->resources) |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1529 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
| 1530 | ps->flags.valid = 1; |
| 1531 | ps->flags.os_accessible = 1; |
| 1532 | } |
| 1533 | |
| 1534 | ps->power = -1; /* Unknown - driver assigned */ |
| 1535 | ps->latency = -1; /* Unknown - driver assigned */ |
| 1536 | } |
| 1537 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1538 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | { |
Rafael J. Wysocki | 8bc5053 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1540 | u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1542 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1543 | if (!acpi_has_method(device->handle, "_PS0") && |
| 1544 | !acpi_has_method(device->handle, "_PR0")) |
| 1545 | return; |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1546 | |
| 1547 | device->flags.power_manageable = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | |
| 1549 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1550 | * Power Management Flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1552 | if (acpi_has_method(device->handle, "_PSC")) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1553 | device->power.flags.explicit_get = 1; |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1554 | if (acpi_has_method(device->handle, "_IRC")) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1555 | device->power.flags.inrush_current = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | |
| 1557 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1558 | * Enumerate supported power management states |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | */ |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1560 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
| 1561 | acpi_bus_init_power_state(device, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1563 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1565 | /* Set defaults for D0 and D3 states (always valid) */ |
| 1566 | device->power.states[ACPI_STATE_D0].flags.valid = 1; |
| 1567 | device->power.states[ACPI_STATE_D0].power = 100; |
Rafael J. Wysocki | 8ad928d | 2013-07-30 14:36:20 +0200 | [diff] [blame] | 1568 | device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; |
| 1569 | device->power.states[ACPI_STATE_D3_COLD].power = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | |
Rafael J. Wysocki | 5c7dd71 | 2012-05-18 00:39:35 +0200 | [diff] [blame] | 1571 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
| 1572 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) |
| 1573 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; |
| 1574 | |
Aaron Lu | 1399dfc | 2012-11-21 23:33:40 +0100 | [diff] [blame] | 1575 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
| 1576 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || |
| 1577 | device->power.flags.power_resources) |
| 1578 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; |
| 1579 | |
Rafael J. Wysocki | b378549 | 2013-02-01 23:43:02 +0100 | [diff] [blame] | 1580 | if (acpi_bus_init_power(device)) { |
| 1581 | acpi_free_power_resources_lists(device); |
| 1582 | device->flags.power_manageable = 0; |
| 1583 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | } |
| 1585 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1586 | static void acpi_bus_get_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | /* Presence of _STA indicates 'dynamic_status' */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1589 | if (acpi_has_method(device->handle, "_STA")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | device->flags.dynamic_status = 1; |
| 1591 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | /* Presence of _RMV indicates 'removable' */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1593 | if (acpi_has_method(device->handle, "_RMV")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | device->flags.removable = 1; |
| 1595 | |
| 1596 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1597 | if (acpi_has_method(device->handle, "_EJD") || |
| 1598 | acpi_has_method(device->handle, "_EJ0")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | device->flags.ejectable = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | } |
| 1601 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1602 | static void acpi_device_get_busid(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1604 | char bus_id[5] = { '?', 0 }; |
| 1605 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; |
| 1606 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | |
| 1608 | /* |
| 1609 | * Bus ID |
| 1610 | * ------ |
| 1611 | * The device's Bus ID is simply the object name. |
| 1612 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? |
| 1613 | */ |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1614 | if (ACPI_IS_ROOT_DEVICE(device)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | strcpy(device->pnp.bus_id, "ACPI"); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1616 | return; |
| 1617 | } |
| 1618 | |
| 1619 | switch (device->device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | case ACPI_BUS_TYPE_POWER_BUTTON: |
| 1621 | strcpy(device->pnp.bus_id, "PWRF"); |
| 1622 | break; |
| 1623 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
| 1624 | strcpy(device->pnp.bus_id, "SLPF"); |
| 1625 | break; |
| 1626 | default: |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1627 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | /* Clean up trailing underscores (if any) */ |
| 1629 | for (i = 3; i > 1; i--) { |
| 1630 | if (bus_id[i] == '_') |
| 1631 | bus_id[i] = '\0'; |
| 1632 | else |
| 1633 | break; |
| 1634 | } |
| 1635 | strcpy(device->pnp.bus_id, bus_id); |
| 1636 | break; |
| 1637 | } |
| 1638 | } |
| 1639 | |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1640 | /* |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1641 | * acpi_ata_match - see if an acpi object is an ATA device |
| 1642 | * |
| 1643 | * If an acpi object has one of the ACPI ATA methods defined, |
| 1644 | * then we can safely call it an ATA device. |
| 1645 | */ |
| 1646 | bool acpi_ata_match(acpi_handle handle) |
| 1647 | { |
| 1648 | return acpi_has_method(handle, "_GTF") || |
| 1649 | acpi_has_method(handle, "_GTM") || |
| 1650 | acpi_has_method(handle, "_STM") || |
| 1651 | acpi_has_method(handle, "_SDD"); |
| 1652 | } |
| 1653 | |
| 1654 | /* |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1655 | * 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] | 1656 | * |
| 1657 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, |
| 1658 | * then we can safely call it an ejectable drive bay |
| 1659 | */ |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1660 | bool acpi_bay_match(acpi_handle handle) |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1661 | { |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1662 | acpi_handle phandle; |
| 1663 | |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1664 | if (!acpi_has_method(handle, "_EJ0")) |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1665 | return false; |
| 1666 | if (acpi_ata_match(handle)) |
| 1667 | return true; |
| 1668 | if (ACPI_FAILURE(acpi_get_parent(handle, &phandle))) |
| 1669 | return false; |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1670 | |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1671 | return acpi_ata_match(phandle); |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1672 | } |
| 1673 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1674 | bool acpi_device_is_battery(struct acpi_device *adev) |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1675 | { |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1676 | struct acpi_hardware_id *hwid; |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1677 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1678 | list_for_each_entry(hwid, &adev->pnp.ids, list) |
| 1679 | if (!strcmp("PNP0C0A", hwid->id)) |
| 1680 | return true; |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1681 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1682 | return false; |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1683 | } |
| 1684 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1685 | static bool is_ejectable_bay(struct acpi_device *adev) |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1686 | { |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 1687 | acpi_handle handle = adev->handle; |
| 1688 | |
| 1689 | if (acpi_has_method(handle, "_EJ0") && acpi_device_is_battery(adev)) |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 1690 | return true; |
| 1691 | |
| 1692 | return acpi_bay_match(handle); |
| 1693 | } |
| 1694 | |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1695 | /* |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1696 | * acpi_dock_match - see if an acpi object has a _DCK method |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1697 | */ |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1698 | bool acpi_dock_match(acpi_handle handle) |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1699 | { |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1700 | return acpi_has_method(handle, "_DCK"); |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1701 | } |
| 1702 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 1703 | const char *acpi_device_hid(struct acpi_device *device) |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1704 | { |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1705 | struct acpi_hardware_id *hid; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1706 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 1707 | if (list_empty(&device->pnp.ids)) |
| 1708 | return dummy_hid; |
| 1709 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1710 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
| 1711 | return hid->id; |
| 1712 | } |
| 1713 | EXPORT_SYMBOL(acpi_device_hid); |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1714 | |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1715 | 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] | 1716 | { |
| 1717 | struct acpi_hardware_id *id; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1718 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1719 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
| 1720 | if (!id) |
| 1721 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1722 | |
Thomas Meyer | 581de59 | 2011-08-06 11:32:56 +0200 | [diff] [blame] | 1723 | id->id = kstrdup(dev_id, GFP_KERNEL); |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1724 | if (!id->id) { |
| 1725 | kfree(id); |
| 1726 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1727 | } |
| 1728 | |
Toshi Kani | d4e1a69 | 2013-03-04 21:30:41 +0000 | [diff] [blame] | 1729 | list_add_tail(&id->list, &pnp->ids); |
| 1730 | pnp->type.hardware_id = 1; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1731 | } |
| 1732 | |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1733 | /* |
| 1734 | * Old IBM workstations have a DSDT bug wherein the SMBus object |
| 1735 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" |
| 1736 | * prefix. Work around this. |
| 1737 | */ |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1738 | static bool acpi_ibm_smbus_match(acpi_handle handle) |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1739 | { |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1740 | char node_name[ACPI_PATH_SEGMENT_LENGTH]; |
| 1741 | struct acpi_buffer path = { sizeof(node_name), node_name }; |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1742 | |
| 1743 | if (!dmi_name_in_vendors("IBM")) |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1744 | return false; |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1745 | |
| 1746 | /* Look for SMBS object */ |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1747 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &path)) || |
| 1748 | strcmp("SMBS", path.pointer)) |
| 1749 | return false; |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1750 | |
| 1751 | /* Does it have the necessary (but misnamed) methods? */ |
Jiang Liu | 952c63e | 2013-06-29 00:24:38 +0800 | [diff] [blame] | 1752 | if (acpi_has_method(handle, "SBI") && |
| 1753 | acpi_has_method(handle, "SBR") && |
| 1754 | acpi_has_method(handle, "SBW")) |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1755 | return true; |
| 1756 | |
| 1757 | return false; |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1758 | } |
| 1759 | |
Jiang Liu | ae3caa8 | 2014-02-19 14:02:19 +0800 | [diff] [blame] | 1760 | static bool acpi_object_is_system_bus(acpi_handle handle) |
| 1761 | { |
| 1762 | acpi_handle tmp; |
| 1763 | |
| 1764 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_SB", &tmp)) && |
| 1765 | tmp == handle) |
| 1766 | return true; |
| 1767 | if (ACPI_SUCCESS(acpi_get_handle(NULL, "\\_TZ", &tmp)) && |
| 1768 | tmp == handle) |
| 1769 | return true; |
| 1770 | |
| 1771 | return false; |
| 1772 | } |
| 1773 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1774 | static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, |
| 1775 | int device_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1777 | acpi_status status; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1778 | struct acpi_device_info *info; |
Lv Zheng | 78e25fe | 2012-10-31 02:25:24 +0000 | [diff] [blame] | 1779 | struct acpi_pnp_device_id_list *cid_list; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1780 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1782 | switch (device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | case ACPI_BUS_TYPE_DEVICE: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1784 | if (handle == ACPI_ROOT_OBJECT) { |
| 1785 | acpi_add_id(pnp, ACPI_SYSTEM_HID); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1786 | break; |
| 1787 | } |
| 1788 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1789 | status = acpi_get_object_info(handle, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | if (ACPI_FAILURE(status)) { |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1791 | pr_err(PREFIX "%s: Error reading device info\n", |
| 1792 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | return; |
| 1794 | } |
| 1795 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | if (info->valid & ACPI_VALID_HID) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1797 | acpi_add_id(pnp, info->hardware_id.string); |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1798 | if (info->valid & ACPI_VALID_CID) { |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1799 | cid_list = &info->compatible_id_list; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1800 | for (i = 0; i < cid_list->count; i++) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1801 | acpi_add_id(pnp, cid_list->ids[i].string); |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1802 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | if (info->valid & ACPI_VALID_ADR) { |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1804 | pnp->bus_address = info->address; |
| 1805 | pnp->type.bus_address = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | } |
Lv Zheng | ccf7804 | 2012-10-30 14:41:07 +0100 | [diff] [blame] | 1807 | if (info->valid & ACPI_VALID_UID) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1808 | pnp->unique_id = kstrdup(info->unique_id.string, |
Lv Zheng | ccf7804 | 2012-10-30 14:41:07 +0100 | [diff] [blame] | 1809 | GFP_KERNEL); |
Zhang Rui | ae84333 | 2006-12-07 20:57:10 +0800 | [diff] [blame] | 1810 | |
Bjorn Helgaas | a83893ae | 2009-10-02 11:03:12 -0400 | [diff] [blame] | 1811 | kfree(info); |
| 1812 | |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1813 | /* |
| 1814 | * Some devices don't reliably have _HIDs & _CIDs, so add |
| 1815 | * synthetic HIDs to make sure drivers can find them. |
| 1816 | */ |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1817 | if (acpi_is_video_device(handle)) |
| 1818 | acpi_add_id(pnp, ACPI_VIDEO_HID); |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1819 | else if (acpi_bay_match(handle)) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1820 | acpi_add_id(pnp, ACPI_BAY_HID); |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1821 | else if (acpi_dock_match(handle)) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1822 | acpi_add_id(pnp, ACPI_DOCK_HID); |
Jiang Liu | ebf4df8 | 2013-06-29 00:24:41 +0800 | [diff] [blame] | 1823 | else if (acpi_ibm_smbus_match(handle)) |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1824 | acpi_add_id(pnp, ACPI_SMBUS_IBM_HID); |
Jiang Liu | ae3caa8 | 2014-02-19 14:02:19 +0800 | [diff] [blame] | 1825 | else if (list_empty(&pnp->ids) && |
| 1826 | acpi_object_is_system_bus(handle)) { |
| 1827 | /* \_SB, \_TZ, LNXSYBUS */ |
| 1828 | acpi_add_id(pnp, ACPI_BUS_HID); |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1829 | strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME); |
| 1830 | strcpy(pnp->device_class, ACPI_BUS_CLASS); |
Bjorn Helgaas | b7b30de | 2010-03-24 10:44:33 -0600 | [diff] [blame] | 1831 | } |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1832 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | break; |
| 1834 | case ACPI_BUS_TYPE_POWER: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1835 | acpi_add_id(pnp, ACPI_POWER_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | break; |
| 1837 | case ACPI_BUS_TYPE_PROCESSOR: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1838 | acpi_add_id(pnp, ACPI_PROCESSOR_OBJECT_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | case ACPI_BUS_TYPE_THERMAL: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1841 | acpi_add_id(pnp, ACPI_THERMAL_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | break; |
| 1843 | case ACPI_BUS_TYPE_POWER_BUTTON: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1844 | acpi_add_id(pnp, ACPI_BUTTON_HID_POWERF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | break; |
| 1846 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1847 | acpi_add_id(pnp, ACPI_BUTTON_HID_SLEEPF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | break; |
| 1849 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | } |
| 1851 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1852 | void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) |
| 1853 | { |
| 1854 | struct acpi_hardware_id *id, *tmp; |
| 1855 | |
| 1856 | list_for_each_entry_safe(id, tmp, &pnp->ids, list) { |
| 1857 | kfree(id->id); |
| 1858 | kfree(id); |
| 1859 | } |
| 1860 | kfree(pnp->unique_id); |
| 1861 | } |
| 1862 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1863 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
| 1864 | int type, unsigned long long sta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | { |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1866 | INIT_LIST_HEAD(&device->pnp.ids); |
| 1867 | device->device_type = type; |
| 1868 | device->handle = handle; |
| 1869 | device->parent = acpi_bus_get_parent(handle); |
Rafael J. Wysocki | 25db115 | 2013-11-22 21:56:06 +0100 | [diff] [blame] | 1870 | acpi_set_device_status(device, sta); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1871 | acpi_device_get_busid(device); |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 1872 | acpi_set_pnp_ids(handle, &device->pnp, type); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1873 | acpi_bus_get_flags(device); |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1874 | device->flags.match_driver = false; |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 1875 | device->flags.initialized = true; |
| 1876 | device->flags.visited = false; |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1877 | device_initialize(&device->dev); |
| 1878 | dev_set_uevent_suppress(&device->dev, true); |
| 1879 | } |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1880 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1881 | void acpi_device_add_finalize(struct acpi_device *device) |
| 1882 | { |
| 1883 | dev_set_uevent_suppress(&device->dev, false); |
| 1884 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | } |
| 1886 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1887 | static int acpi_add_single_object(struct acpi_device **child, |
| 1888 | acpi_handle handle, int type, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1889 | unsigned long long sta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | { |
Bjorn Helgaas | 77c2488 | 2009-09-21 19:29:30 +0000 | [diff] [blame] | 1891 | int result; |
| 1892 | struct acpi_device *device; |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1893 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 1895 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | if (!device) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 1897 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1898 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1901 | acpi_init_device_object(device, handle, type, sta); |
| 1902 | acpi_bus_get_power_flags(device); |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1903 | acpi_bus_get_wakeup_device_flags(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1905 | result = acpi_device_add(device, acpi_device_release); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1906 | if (result) { |
Hugh Dickins | 718fb0d | 2009-08-06 23:18:12 +0000 | [diff] [blame] | 1907 | acpi_device_release(&device->dev); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1908 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | } |
| 1910 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1911 | acpi_power_add_remove_device(device, true); |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1912 | acpi_device_add_finalize(device); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1913 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
| 1914 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", |
| 1915 | dev_name(&device->dev), (char *) buffer.pointer, |
| 1916 | device->parent ? dev_name(&device->parent->dev) : "(null)")); |
| 1917 | kfree(buffer.pointer); |
| 1918 | *child = device; |
| 1919 | return 0; |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1920 | } |
| 1921 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1922 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
| 1923 | unsigned long long *sta) |
| 1924 | { |
| 1925 | acpi_status status; |
| 1926 | acpi_object_type acpi_type; |
| 1927 | |
| 1928 | status = acpi_get_type(handle, &acpi_type); |
| 1929 | if (ACPI_FAILURE(status)) |
| 1930 | return -ENODEV; |
| 1931 | |
| 1932 | switch (acpi_type) { |
| 1933 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
| 1934 | case ACPI_TYPE_DEVICE: |
| 1935 | *type = ACPI_BUS_TYPE_DEVICE; |
| 1936 | status = acpi_bus_get_status_handle(handle, sta); |
| 1937 | if (ACPI_FAILURE(status)) |
| 1938 | return -ENODEV; |
| 1939 | break; |
| 1940 | case ACPI_TYPE_PROCESSOR: |
| 1941 | *type = ACPI_BUS_TYPE_PROCESSOR; |
| 1942 | status = acpi_bus_get_status_handle(handle, sta); |
| 1943 | if (ACPI_FAILURE(status)) |
| 1944 | return -ENODEV; |
| 1945 | break; |
| 1946 | case ACPI_TYPE_THERMAL: |
| 1947 | *type = ACPI_BUS_TYPE_THERMAL; |
| 1948 | *sta = ACPI_STA_DEFAULT; |
| 1949 | break; |
| 1950 | case ACPI_TYPE_POWER: |
| 1951 | *type = ACPI_BUS_TYPE_POWER; |
| 1952 | *sta = ACPI_STA_DEFAULT; |
| 1953 | break; |
| 1954 | default: |
| 1955 | return -ENODEV; |
| 1956 | } |
| 1957 | |
| 1958 | return 0; |
| 1959 | } |
| 1960 | |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 1961 | bool acpi_device_is_present(struct acpi_device *adev) |
| 1962 | { |
| 1963 | if (adev->status.present || adev->status.functional) |
| 1964 | return true; |
| 1965 | |
| 1966 | adev->flags.initialized = false; |
| 1967 | return false; |
| 1968 | } |
| 1969 | |
Rafael J. Wysocki | 4b59cc1 | 2013-03-03 23:06:21 +0100 | [diff] [blame] | 1970 | static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler, |
| 1971 | char *idstr, |
| 1972 | const struct acpi_device_id **matchid) |
| 1973 | { |
| 1974 | const struct acpi_device_id *devid; |
| 1975 | |
| 1976 | for (devid = handler->ids; devid->id[0]; devid++) |
| 1977 | if (!strcmp((char *)devid->id, idstr)) { |
| 1978 | if (matchid) |
| 1979 | *matchid = devid; |
| 1980 | |
| 1981 | return true; |
| 1982 | } |
| 1983 | |
| 1984 | return false; |
| 1985 | } |
| 1986 | |
Toshi Kani | 6b772e8f | 2013-03-04 21:30:43 +0000 | [diff] [blame] | 1987 | static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr, |
| 1988 | const struct acpi_device_id **matchid) |
| 1989 | { |
| 1990 | struct acpi_scan_handler *handler; |
| 1991 | |
| 1992 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) |
| 1993 | if (acpi_scan_handler_matching(handler, idstr, matchid)) |
| 1994 | return handler; |
| 1995 | |
| 1996 | return NULL; |
| 1997 | } |
| 1998 | |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 1999 | void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val) |
| 2000 | { |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 2001 | if (!!hotplug->enabled == !!val) |
| 2002 | return; |
| 2003 | |
| 2004 | mutex_lock(&acpi_scan_lock); |
| 2005 | |
| 2006 | hotplug->enabled = val; |
Rafael J. Wysocki | 3f8055c | 2013-03-03 23:08:16 +0100 | [diff] [blame] | 2007 | |
| 2008 | mutex_unlock(&acpi_scan_lock); |
| 2009 | } |
| 2010 | |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 2011 | static void acpi_scan_init_hotplug(struct acpi_device *adev) |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2012 | { |
Toshi Kani | 6b772e8f | 2013-03-04 21:30:43 +0000 | [diff] [blame] | 2013 | struct acpi_hardware_id *hwid; |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2014 | |
Rafael J. Wysocki | b43109f | 2014-02-16 00:09:34 +0100 | [diff] [blame] | 2015 | if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) { |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 2016 | acpi_dock_add(adev); |
| 2017 | return; |
| 2018 | } |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 2019 | list_for_each_entry(hwid, &adev->pnp.ids, list) { |
| 2020 | struct acpi_scan_handler *handler; |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2021 | |
Toshi Kani | 6b772e8f | 2013-03-04 21:30:43 +0000 | [diff] [blame] | 2022 | handler = acpi_scan_match_handler(hwid->id, NULL); |
Rafael J. Wysocki | 1a69947 | 2014-02-06 13:58:13 +0100 | [diff] [blame] | 2023 | if (handler) { |
| 2024 | adev->flags.hotplug_notify = true; |
| 2025 | break; |
| 2026 | } |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 2027 | } |
Rafael J. Wysocki | a33ec39 | 2013-03-03 23:05:29 +0100 | [diff] [blame] | 2028 | } |
| 2029 | |
Rafael J. Wysocki | e386309 | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 2030 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
| 2031 | void *not_used, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | { |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 2033 | struct acpi_device *device = NULL; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 2034 | int type; |
| 2035 | unsigned long long sta; |
| 2036 | int result; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 2037 | |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 2038 | acpi_bus_get_device(handle, &device); |
| 2039 | if (device) |
| 2040 | goto out; |
| 2041 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 2042 | result = acpi_bus_type_and_status(handle, &type, &sta); |
| 2043 | if (result) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 2044 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 2046 | if (type == ACPI_BUS_TYPE_POWER) { |
| 2047 | acpi_add_power_resource(handle); |
| 2048 | return AE_OK; |
| 2049 | } |
| 2050 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 2051 | acpi_add_single_object(&device, handle, type, sta); |
Bjorn Helgaas | e3b87f8 | 2009-09-21 19:30:11 +0000 | [diff] [blame] | 2052 | if (!device) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 2053 | return AE_CTRL_DEPTH; |
| 2054 | |
Rafael J. Wysocki | 3c2cc7f | 2014-02-06 17:31:37 +0100 | [diff] [blame] | 2055 | acpi_scan_init_hotplug(device); |
| 2056 | |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 2057 | out: |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 2058 | if (!*return_value) |
| 2059 | *return_value = device; |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 2060 | |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 2061 | return AE_OK; |
| 2062 | } |
| 2063 | |
Rafael J. Wysocki | 87b85b3 | 2013-02-06 13:05:22 +0100 | [diff] [blame] | 2064 | static int acpi_scan_attach_handler(struct acpi_device *device) |
| 2065 | { |
| 2066 | struct acpi_hardware_id *hwid; |
| 2067 | int ret = 0; |
| 2068 | |
| 2069 | list_for_each_entry(hwid, &device->pnp.ids, list) { |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2070 | const struct acpi_device_id *devid; |
| 2071 | struct acpi_scan_handler *handler; |
Rafael J. Wysocki | 87b85b3 | 2013-02-06 13:05:22 +0100 | [diff] [blame] | 2072 | |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2073 | handler = acpi_scan_match_handler(hwid->id, &devid); |
| 2074 | if (handler) { |
Rafael J. Wysocki | 9cb32ac | 2014-02-11 00:35:46 +0100 | [diff] [blame] | 2075 | device->handler = handler; |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2076 | ret = handler->attach(device, devid); |
Rafael J. Wysocki | 9cb32ac | 2014-02-11 00:35:46 +0100 | [diff] [blame] | 2077 | if (ret > 0) |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2078 | break; |
Rafael J. Wysocki | 9cb32ac | 2014-02-11 00:35:46 +0100 | [diff] [blame] | 2079 | |
| 2080 | device->handler = NULL; |
| 2081 | if (ret < 0) |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2082 | break; |
Rafael J. Wysocki | c569807 | 2013-03-03 23:05:14 +0100 | [diff] [blame] | 2083 | } |
Rafael J. Wysocki | 87b85b3 | 2013-02-06 13:05:22 +0100 | [diff] [blame] | 2084 | } |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 2085 | return ret; |
| 2086 | } |
| 2087 | |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2088 | static void acpi_bus_attach(struct acpi_device *device) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 2089 | { |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2090 | struct acpi_device *child; |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 2091 | acpi_handle ejd; |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 2092 | int ret; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 2093 | |
Rafael J. Wysocki | 1e2380c | 2014-02-16 01:51:01 +0100 | [diff] [blame] | 2094 | if (ACPI_SUCCESS(acpi_bus_get_ejd(device->handle, &ejd))) |
| 2095 | register_dock_dependent_device(device, ejd); |
| 2096 | |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2097 | acpi_bus_get_status(device); |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 2098 | /* Skip devices that are not present. */ |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2099 | if (!acpi_device_is_present(device)) { |
| 2100 | device->flags.visited = false; |
| 2101 | return; |
| 2102 | } |
Rafael J. Wysocki | 3a391a3 | 2013-07-12 13:45:59 +0200 | [diff] [blame] | 2103 | if (device->handler) |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2104 | goto ok; |
Rafael J. Wysocki | 3a391a3 | 2013-07-12 13:45:59 +0200 | [diff] [blame] | 2105 | |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 2106 | if (!device->flags.initialized) { |
| 2107 | acpi_bus_update_power(device, NULL); |
| 2108 | device->flags.initialized = true; |
| 2109 | } |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2110 | device->flags.visited = false; |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 2111 | ret = acpi_scan_attach_handler(device); |
Rafael J. Wysocki | 6931007 | 2013-11-07 01:41:01 +0100 | [diff] [blame] | 2112 | if (ret < 0) |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2113 | return; |
Rafael J. Wysocki | 6931007 | 2013-11-07 01:41:01 +0100 | [diff] [blame] | 2114 | |
| 2115 | device->flags.match_driver = true; |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2116 | if (!ret) { |
| 2117 | ret = device_attach(&device->dev); |
| 2118 | if (ret < 0) |
| 2119 | return; |
| 2120 | } |
| 2121 | device->flags.visited = true; |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 2122 | |
| 2123 | ok: |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2124 | list_for_each_entry(child, &device->children, node) |
| 2125 | acpi_bus_attach(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 2128 | /** |
| 2129 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
| 2130 | * @handle: Root of the namespace scope to scan. |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 2131 | * |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 2132 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
| 2133 | * found devices. |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 2134 | * |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 2135 | * If no devices were found, -ENODEV is returned, but it does not mean that |
| 2136 | * there has been a real error. There just have been no suitable ACPI objects |
| 2137 | * in the table trunk from which the kernel could create a device and add an |
| 2138 | * appropriate driver. |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2139 | * |
| 2140 | * Must be called under acpi_scan_lock. |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 2141 | */ |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 2142 | int acpi_bus_scan(acpi_handle handle) |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 2143 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | void *device = NULL; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 2145 | |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 2146 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Rafael J. Wysocki | e386309 | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 2148 | acpi_bus_check_add, NULL, NULL, &device); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 2149 | |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2150 | if (device) { |
| 2151 | acpi_bus_attach(device); |
| 2152 | return 0; |
| 2153 | } |
| 2154 | return -ENODEV; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 2155 | } |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 2156 | EXPORT_SYMBOL(acpi_bus_scan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2158 | /** |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2159 | * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects. |
| 2160 | * @adev: Root of the ACPI namespace scope to walk. |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2161 | * |
| 2162 | * Must be called under acpi_scan_lock. |
| 2163 | */ |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2164 | void acpi_bus_trim(struct acpi_device *adev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | { |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2166 | struct acpi_scan_handler *handler = adev->handler; |
| 2167 | struct acpi_device *child; |
| 2168 | |
| 2169 | list_for_each_entry_reverse(child, &adev->children, node) |
| 2170 | acpi_bus_trim(child); |
| 2171 | |
Rafael J. Wysocki | a951c77 | 2014-01-27 23:08:09 +0100 | [diff] [blame] | 2172 | adev->flags.match_driver = false; |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2173 | if (handler) { |
| 2174 | if (handler->detach) |
| 2175 | handler->detach(adev); |
| 2176 | |
| 2177 | adev->handler = NULL; |
| 2178 | } else { |
| 2179 | device_release_driver(&adev->dev); |
| 2180 | } |
Rafael J. Wysocki | cecdb19 | 2013-01-15 13:24:02 +0100 | [diff] [blame] | 2181 | /* |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2182 | * Most likely, the device is going away, so put it into D3cold before |
| 2183 | * that. |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 2184 | */ |
Rafael J. Wysocki | 2c22e65 | 2013-11-25 00:52:21 +0100 | [diff] [blame] | 2185 | acpi_device_set_power(adev, ACPI_STATE_D3_COLD); |
| 2186 | adev->flags.initialized = false; |
| 2187 | adev->flags.visited = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | } |
Kristen Accardi | ceaba663 | 2006-02-23 17:56:01 -0800 | [diff] [blame] | 2189 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
| 2190 | |
Bjorn Helgaas | e8b945c | 2009-09-21 19:28:59 +0000 | [diff] [blame] | 2191 | static int acpi_bus_scan_fixed(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 2193 | int result = 0; |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 2194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | /* |
| 2196 | * Enumerate all fixed-feature devices. |
| 2197 | */ |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 2198 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
| 2199 | struct acpi_device *device = NULL; |
| 2200 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 2201 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 2202 | ACPI_BUS_TYPE_POWER_BUTTON, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 2203 | ACPI_STA_DEFAULT); |
| 2204 | if (result) |
| 2205 | return result; |
| 2206 | |
Rafael J. Wysocki | 8834616 | 2013-11-18 14:18:47 +0100 | [diff] [blame] | 2207 | device->flags.match_driver = true; |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 2208 | result = device_attach(&device->dev); |
| 2209 | if (result < 0) |
| 2210 | return result; |
| 2211 | |
Daniel Drake | c10d7a1 | 2012-05-10 00:08:43 +0100 | [diff] [blame] | 2212 | device_init_wakeup(&device->dev, true); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 2213 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 2215 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
| 2216 | struct acpi_device *device = NULL; |
| 2217 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 2218 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 2219 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 2220 | ACPI_STA_DEFAULT); |
| 2221 | if (result) |
| 2222 | return result; |
| 2223 | |
Rafael J. Wysocki | 8834616 | 2013-11-18 14:18:47 +0100 | [diff] [blame] | 2224 | device->flags.match_driver = true; |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 2225 | result = device_attach(&device->dev); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 2226 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 2228 | return result < 0 ? result : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | } |
| 2230 | |
Bjorn Helgaas | e747f27 | 2009-03-24 16:49:43 -0600 | [diff] [blame] | 2231 | int __init acpi_scan_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | { |
| 2233 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | |
Patrick Mochel | 5b32726 | 2006-05-10 10:33:00 -0400 | [diff] [blame] | 2235 | result = bus_register(&acpi_bus_type); |
| 2236 | if (result) { |
| 2237 | /* We don't want to quit even if we failed to add suspend/resume */ |
| 2238 | printk(KERN_ERR PREFIX "Could not register bus type\n"); |
| 2239 | } |
| 2240 | |
Rafael J. Wysocki | 92ef2a2 | 2012-12-21 00:36:40 +0100 | [diff] [blame] | 2241 | acpi_pci_root_init(); |
Rafael J. Wysocki | 4daeaf6 | 2013-01-30 14:27:37 +0100 | [diff] [blame] | 2242 | acpi_pci_link_init(); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 2243 | acpi_processor_init(); |
Rafael J. Wysocki | 141a297 | 2013-01-30 14:27:40 +0100 | [diff] [blame] | 2244 | acpi_platform_init(); |
Rafael J. Wysocki | f58b082 | 2013-03-06 23:46:20 +0100 | [diff] [blame] | 2245 | acpi_lpss_init(); |
Lan Tianyu | 2fa97fe | 2013-06-05 02:27:50 +0000 | [diff] [blame] | 2246 | acpi_cmos_rtc_init(); |
Rafael J. Wysocki | 737f1a9 | 2013-02-08 23:52:39 +0100 | [diff] [blame] | 2247 | acpi_container_init(); |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 2248 | acpi_memory_hotplug_init(); |
Rafael J. Wysocki | 97d9a9e | 2010-11-25 00:10:02 +0100 | [diff] [blame] | 2249 | |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2250 | mutex_lock(&acpi_scan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | * Enumerate devices in the ACPI namespace. |
| 2253 | */ |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 2254 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | if (result) |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2256 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 2258 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | if (result) |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2260 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2261 | |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 2262 | result = acpi_bus_scan_fixed(); |
| 2263 | if (result) { |
Rafael J. Wysocki | 202317a | 2013-11-22 21:54:37 +0100 | [diff] [blame] | 2264 | acpi_detach_data(acpi_root->handle, acpi_scan_drop_device); |
| 2265 | acpi_device_del(acpi_root); |
| 2266 | put_device(&acpi_root->dev); |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2267 | goto out; |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 2268 | } |
| 2269 | |
| 2270 | acpi_update_all_gpes(); |
Rafael J. Wysocki | 3757b94 | 2013-02-13 14:36:47 +0100 | [diff] [blame] | 2271 | |
| 2272 | out: |
| 2273 | mutex_unlock(&acpi_scan_lock); |
| 2274 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | } |