blob: dc14421b93f1b8a12630bd1d2067e585702c0fe3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * scan.c - support for transforming the ACPI namespace into individual objects
3 */
4
5#include <linux/module.h>
6#include <linux/init.h>
Randy Dunlap9b6d97b2006-07-12 02:08:00 -04007#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/acpi.h>
Alok N Kataria74523c92008-06-13 12:54:24 -04009#include <linux/signal.h>
10#include <linux/kthread.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
12#include <acpi/acpi_drivers.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
Bjorn Helgaase60cc7a2009-03-13 12:08:26 -060014#include "internal.h"
15
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#define _COMPONENT ACPI_BUS_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050017ACPI_MODULE_NAME("scan");
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#define STRUCT_TO_INT(s) (*((int*)&s))
Len Brown4be44fc2005-08-05 00:44:28 -040019extern struct acpi_device *acpi_root;
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
21#define ACPI_BUS_CLASS "system_bus"
Thomas Renninger29b71a12007-07-23 14:43:51 +020022#define ACPI_BUS_HID "LNXSYBUS"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#define ACPI_BUS_DEVICE_NAME "System Bus"
24
25static LIST_HEAD(acpi_device_list);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +080026static LIST_HEAD(acpi_bus_id_list);
Shaohua Li90905892009-04-07 10:24:29 +080027DEFINE_MUTEX(acpi_device_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070028LIST_HEAD(acpi_wakeup_device_list);
29
Zhang Ruie49bd2dd2006-12-08 17:23:43 +080030struct acpi_device_bus_id{
Zhang Ruibb095852007-01-04 15:03:18 +080031 char bus_id[15];
Zhang Ruie49bd2dd2006-12-08 17:23:43 +080032 unsigned int instance_no;
33 struct list_head node;
34};
Thomas Renninger29b71a12007-07-23 14:43:51 +020035
36/*
37 * Creates hid/cid(s) string needed for modalias and uevent
38 * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
39 * char *modalias: "acpi:IBM0001:ACPI0001"
40*/
Adrian Bunkb3e572d2007-08-14 23:22:35 +020041static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
42 int size)
43{
Thomas Renninger29b71a12007-07-23 14:43:51 +020044 int len;
Zhang Rui5c9fcb52008-03-20 16:40:32 +080045 int count;
Thomas Renninger29b71a12007-07-23 14:43:51 +020046
Zhang Rui5c9fcb52008-03-20 16:40:32 +080047 if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids)
Thomas Renninger29b71a12007-07-23 14:43:51 +020048 return -ENODEV;
49
Zhang Rui5c9fcb52008-03-20 16:40:32 +080050 len = snprintf(modalias, size, "acpi:");
Thomas Renninger29b71a12007-07-23 14:43:51 +020051 size -= len;
52
Zhang Rui5c9fcb52008-03-20 16:40:32 +080053 if (acpi_dev->flags.hardware_id) {
54 count = snprintf(&modalias[len], size, "%s:",
55 acpi_dev->pnp.hardware_id);
56 if (count < 0 || count >= size)
57 return -EINVAL;
58 len += count;
59 size -= count;
60 }
61
Thomas Renninger29b71a12007-07-23 14:43:51 +020062 if (acpi_dev->flags.compatible_ids) {
Bob Moore15b8dd52009-06-29 13:39:29 +080063 struct acpica_device_id_list *cid_list;
Thomas Renninger29b71a12007-07-23 14:43:51 +020064 int i;
Thomas Renninger29b71a12007-07-23 14:43:51 +020065
66 cid_list = acpi_dev->pnp.cid_list;
67 for (i = 0; i < cid_list->count; i++) {
68 count = snprintf(&modalias[len], size, "%s:",
Bob Moore15b8dd52009-06-29 13:39:29 +080069 cid_list->ids[i].string);
Thomas Renninger29b71a12007-07-23 14:43:51 +020070 if (count < 0 || count >= size) {
Len Brown87ecd5c2008-01-01 14:00:00 -050071 printk(KERN_ERR PREFIX "%s cid[%i] exceeds event buffer size",
Thomas Renninger29b71a12007-07-23 14:43:51 +020072 acpi_dev->pnp.device_name, i);
73 break;
74 }
75 len += count;
76 size -= count;
77 }
78 }
79
80 modalias[len] = '\0';
81 return len;
82}
83
84static ssize_t
85acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
86 struct acpi_device *acpi_dev = to_acpi_device(dev);
87 int len;
88
89 /* Device has no HID and no CID or string is >1024 */
90 len = create_modalias(acpi_dev, buf, 1024);
91 if (len <= 0)
92 return 0;
93 buf[len++] = '\n';
94 return len;
95}
96static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
97
Zhang Ruic8d72a52009-06-22 11:31:16 +080098static void acpi_bus_hot_remove_device(void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099{
Zhang Rui26d46862008-04-29 02:35:48 -0400100 struct acpi_device *device;
101 acpi_handle handle = context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 struct acpi_object_list arg_list;
103 union acpi_object arg;
104 acpi_status status = AE_OK;
105
Zhang Rui26d46862008-04-29 02:35:48 -0400106 if (acpi_bus_get_device(handle, &device))
Zhang Ruic8d72a52009-06-22 11:31:16 +0800107 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Zhang Rui26d46862008-04-29 02:35:48 -0400109 if (!device)
Zhang Ruic8d72a52009-06-22 11:31:16 +0800110 return;
Zhang Rui26d46862008-04-29 02:35:48 -0400111
112 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Kay Sievers07944692008-10-30 01:18:59 +0100113 "Hot-removing device %s...\n", dev_name(&device->dev)));
Zhang Rui26d46862008-04-29 02:35:48 -0400114
115 if (acpi_bus_trim(device, 1)) {
Lin Ming55ac9a02008-09-28 14:51:56 +0800116 printk(KERN_ERR PREFIX
117 "Removing device failed\n");
Zhang Ruic8d72a52009-06-22 11:31:16 +0800118 return;
Zhang Rui26d46862008-04-29 02:35:48 -0400119 }
120
121 /* power off device */
122 status = acpi_evaluate_object(handle, "_PS3", NULL, NULL);
123 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
Lin Ming55ac9a02008-09-28 14:51:56 +0800124 printk(KERN_WARNING PREFIX
125 "Power-off device failed\n");
Zhang Rui26d46862008-04-29 02:35:48 -0400126
127 if (device->flags.lockable) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 arg_list.count = 1;
129 arg_list.pointer = &arg;
130 arg.type = ACPI_TYPE_INTEGER;
131 arg.integer.value = 0;
132 acpi_evaluate_object(handle, "_LCK", &arg_list, NULL);
133 }
134
135 arg_list.count = 1;
136 arg_list.pointer = &arg;
137 arg.type = ACPI_TYPE_INTEGER;
138 arg.integer.value = 1;
139
140 /*
141 * TBD: _EJD support.
142 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
Zhang Rui26d46862008-04-29 02:35:48 -0400144 if (ACPI_FAILURE(status))
Zhang Ruic8d72a52009-06-22 11:31:16 +0800145 printk(KERN_WARNING PREFIX
146 "Eject device failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
Zhang Ruic8d72a52009-06-22 11:31:16 +0800148 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149}
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151static ssize_t
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800152acpi_eject_store(struct device *d, struct device_attribute *attr,
153 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
Len Brown4be44fc2005-08-05 00:44:28 -0400155 int ret = count;
Len Brown4be44fc2005-08-05 00:44:28 -0400156 acpi_status status;
Len Brown4be44fc2005-08-05 00:44:28 -0400157 acpi_object_type type = 0;
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800158 struct acpi_device *acpi_device = to_acpi_device(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160 if ((!count) || (buf[0] != '1')) {
161 return -EINVAL;
162 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163#ifndef FORCE_EJECT
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800164 if (acpi_device->driver == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 ret = -ENODEV;
166 goto err;
167 }
168#endif
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800169 status = acpi_get_type(acpi_device->handle, &type);
170 if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 ret = -ENODEV;
172 goto err;
173 }
174
Zhang Ruic8d72a52009-06-22 11:31:16 +0800175 acpi_os_hotplug_execute(acpi_bus_hot_remove_device, acpi_device->handle);
Alok N Kataria74523c92008-06-13 12:54:24 -0400176err:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178}
179
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800180static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800182static ssize_t
183acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) {
184 struct acpi_device *acpi_dev = to_acpi_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800186 return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id);
187}
188static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
189
190static ssize_t
191acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) {
192 struct acpi_device *acpi_dev = to_acpi_device(dev);
193 struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
194 int result;
195
196 result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path);
Alex Chiang0c526d92009-05-14 08:31:37 -0600197 if (result)
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800198 goto end;
199
200 result = sprintf(buf, "%s\n", (char*)path.pointer);
201 kfree(path.pointer);
Alex Chiang0c526d92009-05-14 08:31:37 -0600202end:
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800203 return result;
204}
205static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL);
206
207static int acpi_device_setup_files(struct acpi_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800209 acpi_status status;
210 acpi_handle temp;
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800211 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800213 /*
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800214 * Devices gotten from FADT don't have a "path" attribute
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800215 */
Alex Chiang0c526d92009-05-14 08:31:37 -0600216 if (dev->handle) {
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800217 result = device_create_file(&dev->dev, &dev_attr_path);
Alex Chiang0c526d92009-05-14 08:31:37 -0600218 if (result)
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800219 goto end;
220 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Alex Chiang0c526d92009-05-14 08:31:37 -0600222 if (dev->flags.hardware_id) {
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800223 result = device_create_file(&dev->dev, &dev_attr_hid);
Alex Chiang0c526d92009-05-14 08:31:37 -0600224 if (result)
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800225 goto end;
226 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Alex Chiang0c526d92009-05-14 08:31:37 -0600228 if (dev->flags.hardware_id || dev->flags.compatible_ids) {
Thomas Renninger29b71a12007-07-23 14:43:51 +0200229 result = device_create_file(&dev->dev, &dev_attr_modalias);
Alex Chiang0c526d92009-05-14 08:31:37 -0600230 if (result)
Thomas Renninger29b71a12007-07-23 14:43:51 +0200231 goto end;
232 }
233
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800234 /*
235 * If device has _EJ0, 'eject' file is created that is used to trigger
236 * hot-removal function from userland.
237 */
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800238 status = acpi_get_handle(dev->handle, "_EJ0", &temp);
239 if (ACPI_SUCCESS(status))
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800240 result = device_create_file(&dev->dev, &dev_attr_eject);
Alex Chiang0c526d92009-05-14 08:31:37 -0600241end:
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800242 return result;
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800243}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800245static void acpi_device_remove_files(struct acpi_device *dev)
246{
247 acpi_status status;
248 acpi_handle temp;
249
250 /*
251 * If device has _EJ0, 'eject' file is created that is used to trigger
252 * hot-removal function from userland.
253 */
254 status = acpi_get_handle(dev->handle, "_EJ0", &temp);
255 if (ACPI_SUCCESS(status))
256 device_remove_file(&dev->dev, &dev_attr_eject);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800257
Thomas Renninger29b71a12007-07-23 14:43:51 +0200258 if (dev->flags.hardware_id || dev->flags.compatible_ids)
259 device_remove_file(&dev->dev, &dev_attr_modalias);
260
Alex Chiang0c526d92009-05-14 08:31:37 -0600261 if (dev->flags.hardware_id)
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800262 device_remove_file(&dev->dev, &dev_attr_hid);
Alex Chiang0c526d92009-05-14 08:31:37 -0600263 if (dev->handle)
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800264 device_remove_file(&dev->dev, &dev_attr_path);
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800265}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266/* --------------------------------------------------------------------------
Zhang Rui9e89dde2006-12-07 20:56:16 +0800267 ACPI Bus operations
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 -------------------------------------------------------------------------- */
Thomas Renninger29b71a12007-07-23 14:43:51 +0200269
270int acpi_match_device_ids(struct acpi_device *device,
271 const struct acpi_device_id *ids)
272{
273 const struct acpi_device_id *id;
274
Zhao Yakui39a0ad82008-08-11 13:40:22 +0800275 /*
276 * If the device is not present, it is unnecessary to load device
277 * driver for it.
278 */
279 if (!device->status.present)
280 return -ENODEV;
281
Thomas Renninger29b71a12007-07-23 14:43:51 +0200282 if (device->flags.hardware_id) {
283 for (id = ids; id->id[0]; id++) {
284 if (!strcmp((char*)id->id, device->pnp.hardware_id))
285 return 0;
286 }
287 }
288
289 if (device->flags.compatible_ids) {
Bob Moore15b8dd52009-06-29 13:39:29 +0800290 struct acpica_device_id_list *cid_list = device->pnp.cid_list;
Thomas Renninger29b71a12007-07-23 14:43:51 +0200291 int i;
292
293 for (id = ids; id->id[0]; id++) {
294 /* compare multiple _CID entries against driver ids */
295 for (i = 0; i < cid_list->count; i++) {
296 if (!strcmp((char*)id->id,
Bob Moore15b8dd52009-06-29 13:39:29 +0800297 cid_list->ids[i].string))
Thomas Renninger29b71a12007-07-23 14:43:51 +0200298 return 0;
299 }
300 }
301 }
302
303 return -ENOENT;
304}
305EXPORT_SYMBOL(acpi_match_device_ids);
306
Patrick Mochel1890a972006-12-07 20:56:31 +0800307static void acpi_device_release(struct device *dev)
308{
309 struct acpi_device *acpi_dev = to_acpi_device(dev);
310
311 kfree(acpi_dev->pnp.cid_list);
Hugh Dickins718fb0d2009-08-06 23:18:12 +0000312 if (acpi_dev->flags.hardware_id)
313 kfree(acpi_dev->pnp.hardware_id);
314 if (acpi_dev->flags.unique_id)
315 kfree(acpi_dev->pnp.unique_id);
Patrick Mochel1890a972006-12-07 20:56:31 +0800316 kfree(acpi_dev);
317}
318
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800319static int acpi_device_suspend(struct device *dev, pm_message_t state)
Zhang Rui9e89dde2006-12-07 20:56:16 +0800320{
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800321 struct acpi_device *acpi_dev = to_acpi_device(dev);
322 struct acpi_driver *acpi_drv = acpi_dev->driver;
Zhang Rui9e89dde2006-12-07 20:56:16 +0800323
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800324 if (acpi_drv && acpi_drv->ops.suspend)
325 return acpi_drv->ops.suspend(acpi_dev, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 return 0;
327}
328
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800329static int acpi_device_resume(struct device *dev)
330{
331 struct acpi_device *acpi_dev = to_acpi_device(dev);
332 struct acpi_driver *acpi_drv = acpi_dev->driver;
333
334 if (acpi_drv && acpi_drv->ops.resume)
335 return acpi_drv->ops.resume(acpi_dev);
336 return 0;
337}
338
339static int acpi_bus_match(struct device *dev, struct device_driver *drv)
340{
341 struct acpi_device *acpi_dev = to_acpi_device(dev);
342 struct acpi_driver *acpi_drv = to_acpi_driver(drv);
343
Thomas Renninger29b71a12007-07-23 14:43:51 +0200344 return !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800345}
346
Kay Sievers7eff2e72007-08-14 15:15:12 +0200347static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800348{
349 struct acpi_device *acpi_dev = to_acpi_device(dev);
Kay Sievers7eff2e72007-08-14 15:15:12 +0200350 int len;
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800351
Kay Sievers7eff2e72007-08-14 15:15:12 +0200352 if (add_uevent_var(env, "MODALIAS="))
353 return -ENOMEM;
354 len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],
355 sizeof(env->buf) - env->buflen);
356 if (len >= (sizeof(env->buf) - env->buflen))
357 return -ENOMEM;
358 env->buflen += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 return 0;
360}
361
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000362static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
363{
364 struct acpi_device *device = data;
365
366 device->driver->ops.notify(device, event);
367}
368
369static acpi_status acpi_device_notify_fixed(void *data)
370{
371 struct acpi_device *device = data;
372
373 acpi_device_notify(device->handle, ACPI_FIXED_HARDWARE_EVENT, device);
374 return AE_OK;
375}
376
377static int acpi_device_install_notify_handler(struct acpi_device *device)
378{
379 acpi_status status;
380 char *hid;
381
382 hid = acpi_device_hid(device);
383 if (!strcmp(hid, ACPI_BUTTON_HID_POWERF))
384 status =
385 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
386 acpi_device_notify_fixed,
387 device);
388 else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEPF))
389 status =
390 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
391 acpi_device_notify_fixed,
392 device);
393 else
394 status = acpi_install_notify_handler(device->handle,
395 ACPI_DEVICE_NOTIFY,
396 acpi_device_notify,
397 device);
398
399 if (ACPI_FAILURE(status))
400 return -EINVAL;
401 return 0;
402}
403
404static void acpi_device_remove_notify_handler(struct acpi_device *device)
405{
406 if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF))
407 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
408 acpi_device_notify_fixed);
409 else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF))
410 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
411 acpi_device_notify_fixed);
412 else
413 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
414 acpi_device_notify);
415}
416
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800417static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
418static int acpi_start_single_object(struct acpi_device *);
419static int acpi_device_probe(struct device * dev)
Zhang Rui9e89dde2006-12-07 20:56:16 +0800420{
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800421 struct acpi_device *acpi_dev = to_acpi_device(dev);
422 struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
423 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800425 ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
426 if (!ret) {
Li Shaohuac4168bf2006-12-07 20:56:41 +0800427 if (acpi_dev->bus_ops.acpi_op_start)
428 acpi_start_single_object(acpi_dev);
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000429
430 if (acpi_drv->ops.notify) {
431 ret = acpi_device_install_notify_handler(acpi_dev);
432 if (ret) {
433 if (acpi_drv->ops.stop)
434 acpi_drv->ops.stop(acpi_dev,
435 acpi_dev->removal_type);
436 if (acpi_drv->ops.remove)
437 acpi_drv->ops.remove(acpi_dev,
438 acpi_dev->removal_type);
439 return ret;
440 }
441 }
442
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800443 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
444 "Found driver [%s] for device [%s]\n",
445 acpi_drv->name, acpi_dev->pnp.bus_id));
446 get_device(dev);
Zhang Rui9e89dde2006-12-07 20:56:16 +0800447 }
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800448 return ret;
449}
450
451static int acpi_device_remove(struct device * dev)
452{
453 struct acpi_device *acpi_dev = to_acpi_device(dev);
454 struct acpi_driver *acpi_drv = acpi_dev->driver;
455
456 if (acpi_drv) {
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000457 if (acpi_drv->ops.notify)
458 acpi_device_remove_notify_handler(acpi_dev);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800459 if (acpi_drv->ops.stop)
Li Shaohua96333572006-12-07 20:56:46 +0800460 acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800461 if (acpi_drv->ops.remove)
Li Shaohua96333572006-12-07 20:56:46 +0800462 acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800463 }
464 acpi_dev->driver = NULL;
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700465 acpi_dev->driver_data = NULL;
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800466
467 put_device(dev);
Zhang Rui9e89dde2006-12-07 20:56:16 +0800468 return 0;
469}
470
David Brownell55955aa2007-05-08 00:28:35 -0700471struct bus_type acpi_bus_type = {
Zhang Rui9e89dde2006-12-07 20:56:16 +0800472 .name = "acpi",
473 .suspend = acpi_device_suspend,
474 .resume = acpi_device_resume,
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800475 .match = acpi_bus_match,
476 .probe = acpi_device_probe,
477 .remove = acpi_device_remove,
478 .uevent = acpi_device_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479};
480
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800481static int acpi_device_register(struct acpi_device *device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 struct acpi_device *parent)
483{
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800484 int result;
485 struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
486 int found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 /*
488 * Linkage
489 * -------
490 * Link this device to its parent and siblings.
491 */
492 INIT_LIST_HEAD(&device->children);
493 INIT_LIST_HEAD(&device->node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 INIT_LIST_HEAD(&device->wakeup_list);
495
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800496 new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
497 if (!new_bus_id) {
498 printk(KERN_ERR PREFIX "Memory allocation error\n");
499 return -ENOMEM;
500 }
501
Shaohua Li90905892009-04-07 10:24:29 +0800502 mutex_lock(&acpi_device_lock);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800503 /*
504 * Find suitable bus_id and instance number in acpi_bus_id_list
505 * If failed, create one and link it into acpi_bus_id_list
506 */
507 list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) {
Zhang Ruibb095852007-01-04 15:03:18 +0800508 if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) {
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800509 acpi_device_bus_id->instance_no ++;
510 found = 1;
511 kfree(new_bus_id);
512 break;
513 }
514 }
Alex Chiang0c526d92009-05-14 08:31:37 -0600515 if (!found) {
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800516 acpi_device_bus_id = new_bus_id;
Zhang Ruibb095852007-01-04 15:03:18 +0800517 strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device");
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800518 acpi_device_bus_id->instance_no = 0;
519 list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list);
520 }
Kay Sievers07944692008-10-30 01:18:59 +0100521 dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800522
Len Brown33b57152008-12-15 22:09:26 -0500523 if (device->parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 list_add_tail(&device->node, &device->parent->children);
Len Brown33b57152008-12-15 22:09:26 -0500525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 if (device->wakeup.flags.valid)
527 list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
Shaohua Li90905892009-04-07 10:24:29 +0800528 mutex_unlock(&acpi_device_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
Patrick Mochel1890a972006-12-07 20:56:31 +0800530 if (device->parent)
531 device->dev.parent = &parent->dev;
532 device->dev.bus = &acpi_bus_type;
Patrick Mochel1890a972006-12-07 20:56:31 +0800533 device->dev.release = &acpi_device_release;
Alex Chiang8b12b922009-05-14 08:31:32 -0600534 result = device_register(&device->dev);
Alex Chiang0c526d92009-05-14 08:31:37 -0600535 if (result) {
Alex Chiang8b12b922009-05-14 08:31:32 -0600536 dev_err(&device->dev, "Error registering device\n");
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800537 goto end;
538 }
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800539
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800540 result = acpi_device_setup_files(device);
Alex Chiang0c526d92009-05-14 08:31:37 -0600541 if (result)
Kay Sievers07944692008-10-30 01:18:59 +0100542 printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n",
543 dev_name(&device->dev));
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800544
Li Shaohua96333572006-12-07 20:56:46 +0800545 device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800546 return 0;
Alex Chiang0c526d92009-05-14 08:31:37 -0600547end:
Shaohua Li90905892009-04-07 10:24:29 +0800548 mutex_lock(&acpi_device_lock);
Len Brown33b57152008-12-15 22:09:26 -0500549 if (device->parent)
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800550 list_del(&device->node);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800551 list_del(&device->wakeup_list);
Shaohua Li90905892009-04-07 10:24:29 +0800552 mutex_unlock(&acpi_device_lock);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800553 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554}
555
556static void acpi_device_unregister(struct acpi_device *device, int type)
557{
Shaohua Li90905892009-04-07 10:24:29 +0800558 mutex_lock(&acpi_device_lock);
Len Brown33b57152008-12-15 22:09:26 -0500559 if (device->parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 list_del(&device->node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
562 list_del(&device->wakeup_list);
Shaohua Li90905892009-04-07 10:24:29 +0800563 mutex_unlock(&acpi_device_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565 acpi_detach_data(device->handle, acpi_bus_data_handler);
Patrick Mochel1890a972006-12-07 20:56:31 +0800566
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800567 acpi_device_remove_files(device);
Patrick Mochel1890a972006-12-07 20:56:31 +0800568 device_unregister(&device->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569}
570
Zhang Rui9e89dde2006-12-07 20:56:16 +0800571/* --------------------------------------------------------------------------
572 Driver Management
573 -------------------------------------------------------------------------- */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500575 * acpi_bus_driver_init - add a device to a driver
576 * @device: the device to add and initialize
577 * @driver: driver for the device
578 *
Alex Chiang0c526d92009-05-14 08:31:37 -0600579 * Used to initialize a device via its device driver. Called whenever a
Patrick Mochel1890a972006-12-07 20:56:31 +0800580 * driver is bound to a device. Invokes the driver's add() ops.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 */
582static int
Len Brown4be44fc2005-08-05 00:44:28 -0400583acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584{
Len Brown4be44fc2005-08-05 00:44:28 -0400585 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 if (!device || !driver)
Patrick Mocheld550d982006-06-27 00:41:40 -0400588 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
590 if (!driver->ops.add)
Patrick Mocheld550d982006-06-27 00:41:40 -0400591 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592
593 result = driver->ops.add(device);
594 if (result) {
595 device->driver = NULL;
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700596 device->driver_data = NULL;
Patrick Mocheld550d982006-06-27 00:41:40 -0400597 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 }
599
600 device->driver = driver;
601
602 /*
603 * TBD - Configuration Management: Assign resources to device based
604 * upon possible configuration and currently allocated resources.
605 */
606
Len Brown4be44fc2005-08-05 00:44:28 -0400607 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
608 "Driver successfully bound to device\n"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400609 return 0;
Rajesh Shah3fb02732005-04-28 00:25:52 -0700610}
611
Adrian Bunk8713cbe2005-09-02 17:16:48 -0400612static int acpi_start_single_object(struct acpi_device *device)
Rajesh Shah3fb02732005-04-28 00:25:52 -0700613{
614 int result = 0;
615 struct acpi_driver *driver;
616
Rajesh Shah3fb02732005-04-28 00:25:52 -0700617
618 if (!(driver = device->driver))
Patrick Mocheld550d982006-06-27 00:41:40 -0400619 return 0;
Rajesh Shah3fb02732005-04-28 00:25:52 -0700620
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 if (driver->ops.start) {
622 result = driver->ops.start(device);
623 if (result && driver->ops.remove)
624 driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 }
626
Patrick Mocheld550d982006-06-27 00:41:40 -0400627 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628}
629
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500631 * acpi_bus_register_driver - register a driver with the ACPI bus
632 * @driver: driver being registered
633 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 * Registers a driver with the ACPI bus. Searches the namespace for all
Bjorn Helgaas9d9f7492006-03-28 17:04:00 -0500635 * devices that match the driver's criteria and binds. Returns zero for
636 * success or a negative error status for failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 */
Len Brown4be44fc2005-08-05 00:44:28 -0400638int acpi_bus_register_driver(struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639{
Patrick Mochel1890a972006-12-07 20:56:31 +0800640 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
642 if (acpi_disabled)
Patrick Mocheld550d982006-06-27 00:41:40 -0400643 return -ENODEV;
Patrick Mochel1890a972006-12-07 20:56:31 +0800644 driver->drv.name = driver->name;
645 driver->drv.bus = &acpi_bus_type;
646 driver->drv.owner = driver->owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
Patrick Mochel1890a972006-12-07 20:56:31 +0800648 ret = driver_register(&driver->drv);
649 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Len Brown4be44fc2005-08-05 00:44:28 -0400652EXPORT_SYMBOL(acpi_bus_register_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
654/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500655 * acpi_bus_unregister_driver - unregisters a driver with the APIC bus
656 * @driver: driver to unregister
657 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 * Unregisters a driver with the ACPI bus. Searches the namespace for all
659 * devices that match the driver's criteria and unbinds.
660 */
Bjorn Helgaas06ea8e082006-04-27 05:25:00 -0400661void acpi_bus_unregister_driver(struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662{
Patrick Mochel1890a972006-12-07 20:56:31 +0800663 driver_unregister(&driver->drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664}
Len Brown4be44fc2005-08-05 00:44:28 -0400665
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666EXPORT_SYMBOL(acpi_bus_unregister_driver);
667
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668/* --------------------------------------------------------------------------
669 Device Enumeration
670 -------------------------------------------------------------------------- */
Len Brownc8f7a622006-07-09 17:22:28 -0400671acpi_status
672acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd)
673{
674 acpi_status status;
675 acpi_handle tmp;
676 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
677 union acpi_object *obj;
678
679 status = acpi_get_handle(handle, "_EJD", &tmp);
680 if (ACPI_FAILURE(status))
681 return status;
682
683 status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer);
684 if (ACPI_SUCCESS(status)) {
685 obj = buffer.pointer;
Holger Macht3b5fee52008-02-14 13:40:34 +0100686 status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer,
687 ejd);
Len Brownc8f7a622006-07-09 17:22:28 -0400688 kfree(buffer.pointer);
689 }
690 return status;
691}
692EXPORT_SYMBOL_GPL(acpi_bus_get_ejd);
693
Bob Moore8e4319c2009-06-29 13:43:27 +0800694void acpi_bus_data_handler(acpi_handle handle, void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695{
696
697 /* TBD */
698
699 return;
700}
701
Zhang Rui9e89dde2006-12-07 20:56:16 +0800702static int acpi_bus_get_perf_flags(struct acpi_device *device)
703{
704 device->performance.state = ACPI_STATE_UNKNOWN;
705 return 0;
706}
707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708static acpi_status
709acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
710 union acpi_object *package)
711{
712 int i = 0;
713 union acpi_object *element = NULL;
714
715 if (!device || !package || (package->package.count < 2))
716 return AE_BAD_PARAMETER;
717
718 element = &(package->package.elements[0]);
719 if (!element)
720 return AE_BAD_PARAMETER;
721 if (element->type == ACPI_TYPE_PACKAGE) {
722 if ((element->package.count < 2) ||
723 (element->package.elements[0].type !=
724 ACPI_TYPE_LOCAL_REFERENCE)
725 || (element->package.elements[1].type != ACPI_TYPE_INTEGER))
726 return AE_BAD_DATA;
727 device->wakeup.gpe_device =
728 element->package.elements[0].reference.handle;
729 device->wakeup.gpe_number =
730 (u32) element->package.elements[1].integer.value;
731 } else if (element->type == ACPI_TYPE_INTEGER) {
732 device->wakeup.gpe_number = element->integer.value;
733 } else
734 return AE_BAD_DATA;
735
736 element = &(package->package.elements[1]);
737 if (element->type != ACPI_TYPE_INTEGER) {
738 return AE_BAD_DATA;
739 }
740 device->wakeup.sleep_state = element->integer.value;
741
742 if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
743 return AE_NO_MEMORY;
744 }
745 device->wakeup.resources.count = package->package.count - 2;
746 for (i = 0; i < device->wakeup.resources.count; i++) {
747 element = &(package->package.elements[i + 2]);
Bob Moorecd0b2242008-04-10 19:06:43 +0400748 if (element->type != ACPI_TYPE_LOCAL_REFERENCE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 return AE_BAD_DATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
751 device->wakeup.resources.handles[i] = element->reference.handle;
752 }
753
754 return AE_OK;
755}
756
757static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
758{
759 acpi_status status = 0;
760 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
761 union acpi_object *package = NULL;
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200762 int psw_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Thomas Renninger29b71a12007-07-23 14:43:51 +0200764 struct acpi_device_id button_device_ids[] = {
765 {"PNP0C0D", 0},
766 {"PNP0C0C", 0},
767 {"PNP0C0E", 0},
768 {"", 0},
769 };
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 /* _PRW */
772 status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
773 if (ACPI_FAILURE(status)) {
774 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
775 goto end;
776 }
777
778 package = (union acpi_object *)buffer.pointer;
779 status = acpi_bus_extract_wakeup_device_power_package(device, package);
780 if (ACPI_FAILURE(status)) {
781 ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
782 goto end;
783 }
784
785 kfree(buffer.pointer);
786
787 device->wakeup.flags.valid = 1;
Zhao Yakui729b2bd2008-03-19 13:26:54 +0800788 /* Call _PSW/_DSW object to disable its ability to wake the sleeping
789 * system for the ACPI device with the _PRW object.
790 * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
791 * So it is necessary to call _DSW object first. Only when it is not
792 * present will the _PSW object used.
793 */
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200794 psw_error = acpi_device_sleep_wake(device, 0, 0, 0);
795 if (psw_error)
796 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
797 "error in _DSW or _PSW evaluation\n"));
798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 /* Power button, Lid switch always enable wakeup */
Thomas Renninger29b71a12007-07-23 14:43:51 +0200800 if (!acpi_match_device_ids(device, button_device_ids))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 device->wakeup.flags.run_wake = 1;
802
Alex Chiang0c526d92009-05-14 08:31:37 -0600803end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 if (ACPI_FAILURE(status))
805 device->flags.wake_capable = 0;
806 return 0;
807}
808
Zhang Rui9e89dde2006-12-07 20:56:16 +0800809static int acpi_bus_get_power_flags(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810{
Zhang Rui9e89dde2006-12-07 20:56:16 +0800811 acpi_status status = 0;
812 acpi_handle handle = NULL;
813 u32 i = 0;
814
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
816 /*
Zhang Rui9e89dde2006-12-07 20:56:16 +0800817 * Power Management Flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 */
Zhang Rui9e89dde2006-12-07 20:56:16 +0800819 status = acpi_get_handle(device->handle, "_PSC", &handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 if (ACPI_SUCCESS(status))
Zhang Rui9e89dde2006-12-07 20:56:16 +0800821 device->power.flags.explicit_get = 1;
822 status = acpi_get_handle(device->handle, "_IRC", &handle);
823 if (ACPI_SUCCESS(status))
824 device->power.flags.inrush_current = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826 /*
Zhang Rui9e89dde2006-12-07 20:56:16 +0800827 * Enumerate supported power management states
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 */
Zhang Rui9e89dde2006-12-07 20:56:16 +0800829 for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
830 struct acpi_device_power_state *ps = &device->power.states[i];
831 char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
Zhang Rui9e89dde2006-12-07 20:56:16 +0800833 /* Evaluate "_PRx" to se if power resources are referenced */
834 acpi_evaluate_reference(device->handle, object_name, NULL,
835 &ps->resources);
836 if (ps->resources.count) {
837 device->power.flags.power_resources = 1;
838 ps->flags.valid = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Zhang Rui9e89dde2006-12-07 20:56:16 +0800841 /* Evaluate "_PSx" to see if we can do explicit sets */
842 object_name[2] = 'S';
843 status = acpi_get_handle(device->handle, object_name, &handle);
844 if (ACPI_SUCCESS(status)) {
845 ps->flags.explicit_set = 1;
846 ps->flags.valid = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 }
Zhang Rui9e89dde2006-12-07 20:56:16 +0800848
849 /* State is valid if we have some power control */
850 if (ps->resources.count || ps->flags.explicit_set)
851 ps->flags.valid = 1;
852
853 ps->power = -1; /* Unknown - driver assigned */
854 ps->latency = -1; /* Unknown - driver assigned */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
Zhang Rui9e89dde2006-12-07 20:56:16 +0800857 /* Set defaults for D0 and D3 states (always valid) */
858 device->power.states[ACPI_STATE_D0].flags.valid = 1;
859 device->power.states[ACPI_STATE_D0].power = 100;
860 device->power.states[ACPI_STATE_D3].flags.valid = 1;
861 device->power.states[ACPI_STATE_D3].power = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
Zhang Rui9e89dde2006-12-07 20:56:16 +0800863 /* TBD: System wake support and resource requirements. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
Zhang Rui9e89dde2006-12-07 20:56:16 +0800865 device->power.state = ACPI_STATE_UNKNOWN;
Zhao Yakuia51e1452008-08-11 14:55:05 +0800866 acpi_bus_get_power(device->handle, &(device->power.state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
868 return 0;
869}
870
Len Brown4be44fc2005-08-05 00:44:28 -0400871static int acpi_bus_get_flags(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872{
Len Brown4be44fc2005-08-05 00:44:28 -0400873 acpi_status status = AE_OK;
874 acpi_handle temp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
877 /* Presence of _STA indicates 'dynamic_status' */
878 status = acpi_get_handle(device->handle, "_STA", &temp);
879 if (ACPI_SUCCESS(status))
880 device->flags.dynamic_status = 1;
881
882 /* Presence of _CID indicates 'compatible_ids' */
883 status = acpi_get_handle(device->handle, "_CID", &temp);
884 if (ACPI_SUCCESS(status))
885 device->flags.compatible_ids = 1;
886
887 /* Presence of _RMV indicates 'removable' */
888 status = acpi_get_handle(device->handle, "_RMV", &temp);
889 if (ACPI_SUCCESS(status))
890 device->flags.removable = 1;
891
892 /* Presence of _EJD|_EJ0 indicates 'ejectable' */
893 status = acpi_get_handle(device->handle, "_EJD", &temp);
894 if (ACPI_SUCCESS(status))
895 device->flags.ejectable = 1;
896 else {
897 status = acpi_get_handle(device->handle, "_EJ0", &temp);
898 if (ACPI_SUCCESS(status))
899 device->flags.ejectable = 1;
900 }
901
902 /* Presence of _LCK indicates 'lockable' */
903 status = acpi_get_handle(device->handle, "_LCK", &temp);
904 if (ACPI_SUCCESS(status))
905 device->flags.lockable = 1;
906
907 /* Presence of _PS0|_PR0 indicates 'power manageable' */
908 status = acpi_get_handle(device->handle, "_PS0", &temp);
909 if (ACPI_FAILURE(status))
910 status = acpi_get_handle(device->handle, "_PR0", &temp);
911 if (ACPI_SUCCESS(status))
912 device->flags.power_manageable = 1;
913
914 /* Presence of _PRW indicates wake capable */
915 status = acpi_get_handle(device->handle, "_PRW", &temp);
916 if (ACPI_SUCCESS(status))
917 device->flags.wake_capable = 1;
918
Joe Perches3c5f9be42008-02-03 17:06:17 +0200919 /* TBD: Performance management */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
Patrick Mocheld550d982006-06-27 00:41:40 -0400921 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922}
923
Len Brown4be44fc2005-08-05 00:44:28 -0400924static void acpi_device_get_busid(struct acpi_device *device,
925 acpi_handle handle, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926{
Len Brown4be44fc2005-08-05 00:44:28 -0400927 char bus_id[5] = { '?', 0 };
928 struct acpi_buffer buffer = { sizeof(bus_id), bus_id };
929 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
931 /*
932 * Bus ID
933 * ------
934 * The device's Bus ID is simply the object name.
935 * TBD: Shouldn't this value be unique (within the ACPI namespace)?
936 */
937 switch (type) {
938 case ACPI_BUS_TYPE_SYSTEM:
939 strcpy(device->pnp.bus_id, "ACPI");
940 break;
941 case ACPI_BUS_TYPE_POWER_BUTTON:
942 strcpy(device->pnp.bus_id, "PWRF");
943 break;
944 case ACPI_BUS_TYPE_SLEEP_BUTTON:
945 strcpy(device->pnp.bus_id, "SLPF");
946 break;
947 default:
948 acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
949 /* Clean up trailing underscores (if any) */
950 for (i = 3; i > 1; i--) {
951 if (bus_id[i] == '_')
952 bus_id[i] = '\0';
953 else
954 break;
955 }
956 strcpy(device->pnp.bus_id, bus_id);
957 break;
958 }
959}
960
Zhang Rui54735262007-01-11 02:09:09 -0500961/*
962 * acpi_bay_match - see if a device is an ejectable driver bay
963 *
964 * If an acpi object is ejectable and has one of the ACPI ATA methods defined,
965 * then we can safely call it an ejectable drive bay
966 */
967static int acpi_bay_match(struct acpi_device *device){
968 acpi_status status;
969 acpi_handle handle;
970 acpi_handle tmp;
971 acpi_handle phandle;
972
973 handle = device->handle;
974
975 status = acpi_get_handle(handle, "_EJ0", &tmp);
976 if (ACPI_FAILURE(status))
977 return -ENODEV;
978
979 if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
980 (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
981 (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
982 (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
983 return 0;
984
985 if (acpi_get_parent(handle, &phandle))
986 return -ENODEV;
987
988 if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
989 (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
990 (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
991 (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
992 return 0;
993
994 return -ENODEV;
995}
996
Frank Seidel3620f2f2007-12-07 13:20:34 +0100997/*
998 * acpi_dock_match - see if a device has a _DCK method
999 */
1000static int acpi_dock_match(struct acpi_device *device)
1001{
1002 acpi_handle tmp;
1003 return acpi_get_handle(device->handle, "_DCK", &tmp);
1004}
1005
Bob Moore15b8dd52009-06-29 13:39:29 +08001006static struct acpica_device_id_list*
1007acpi_add_cid(
1008 struct acpi_device_info *info,
1009 struct acpica_device_id *new_cid)
1010{
1011 struct acpica_device_id_list *cid;
1012 char *next_id_string;
1013 acpi_size cid_length;
1014 acpi_size new_cid_length;
1015 u32 i;
1016
1017
1018 /* Allocate new CID list with room for the new CID */
1019
1020 if (!new_cid)
1021 new_cid_length = info->compatible_id_list.list_size;
1022 else if (info->compatible_id_list.list_size)
1023 new_cid_length = info->compatible_id_list.list_size +
1024 new_cid->length + sizeof(struct acpica_device_id);
1025 else
1026 new_cid_length = sizeof(struct acpica_device_id_list) + new_cid->length;
1027
1028 cid = ACPI_ALLOCATE_ZEROED(new_cid_length);
1029 if (!cid) {
1030 return NULL;
1031 }
1032
1033 cid->list_size = new_cid_length;
1034 cid->count = info->compatible_id_list.count;
1035 if (new_cid)
1036 cid->count++;
1037 next_id_string = (char *) cid->ids + (cid->count * sizeof(struct acpica_device_id));
1038
1039 /* Copy all existing CIDs */
1040
1041 for (i = 0; i < info->compatible_id_list.count; i++) {
1042 cid_length = info->compatible_id_list.ids[i].length;
1043 cid->ids[i].string = next_id_string;
1044 cid->ids[i].length = cid_length;
1045
1046 ACPI_MEMCPY(next_id_string, info->compatible_id_list.ids[i].string,
1047 cid_length);
1048
1049 next_id_string += cid_length;
1050 }
1051
1052 /* Append the new CID */
1053
1054 if (new_cid) {
1055 cid->ids[i].string = next_id_string;
1056 cid->ids[i].length = new_cid->length;
1057
1058 ACPI_MEMCPY(next_id_string, new_cid->string, new_cid->length);
1059 }
1060
1061 return cid;
1062}
1063
Len Brown4be44fc2005-08-05 00:44:28 -04001064static void acpi_device_set_id(struct acpi_device *device,
1065 struct acpi_device *parent, acpi_handle handle,
1066 int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067{
Bob Moore15b8dd52009-06-29 13:39:29 +08001068 struct acpi_device_info *info = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -04001069 char *hid = NULL;
1070 char *uid = NULL;
Bob Moore15b8dd52009-06-29 13:39:29 +08001071 struct acpica_device_id_list *cid_list = NULL;
1072 char *cid_add = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -04001073 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
1075 switch (type) {
1076 case ACPI_BUS_TYPE_DEVICE:
Bob Moore15b8dd52009-06-29 13:39:29 +08001077 status = acpi_get_object_info(handle, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 if (ACPI_FAILURE(status)) {
Harvey Harrison96b2dd12008-03-05 18:24:51 -08001079 printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 return;
1081 }
1082
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 if (info->valid & ACPI_VALID_HID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001084 hid = info->hardware_id.string;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 if (info->valid & ACPI_VALID_UID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001086 uid = info->unique_id.string;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 if (info->valid & ACPI_VALID_CID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001088 cid_list = &info->compatible_id_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 if (info->valid & ACPI_VALID_ADR) {
1090 device->pnp.bus_address = info->address;
1091 device->flags.bus_address = 1;
1092 }
Zhang Ruiae843332006-12-07 20:57:10 +08001093
Frank Seidel3620f2f2007-12-07 13:20:34 +01001094 /* If we have a video/bay/dock device, add our selfdefined
1095 HID to the CID list. Like that the video/bay/dock drivers
1096 will get autoloaded and the device might still match
1097 against another driver.
1098 */
Thomas Renningerc3d6de62008-08-01 17:37:55 +02001099 if (acpi_is_video_device(device))
Frank Seidel3620f2f2007-12-07 13:20:34 +01001100 cid_add = ACPI_VIDEO_HID;
1101 else if (ACPI_SUCCESS(acpi_bay_match(device)))
1102 cid_add = ACPI_BAY_HID;
1103 else if (ACPI_SUCCESS(acpi_dock_match(device)))
1104 cid_add = ACPI_DOCK_HID;
Zhang Rui54735262007-01-11 02:09:09 -05001105
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 break;
1107 case ACPI_BUS_TYPE_POWER:
1108 hid = ACPI_POWER_HID;
1109 break;
1110 case ACPI_BUS_TYPE_PROCESSOR:
Myron Stowead93a762008-11-04 14:52:55 -07001111 hid = ACPI_PROCESSOR_OBJECT_HID;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 break;
1113 case ACPI_BUS_TYPE_SYSTEM:
1114 hid = ACPI_SYSTEM_HID;
1115 break;
1116 case ACPI_BUS_TYPE_THERMAL:
1117 hid = ACPI_THERMAL_HID;
1118 break;
1119 case ACPI_BUS_TYPE_POWER_BUTTON:
1120 hid = ACPI_BUTTON_HID_POWERF;
1121 break;
1122 case ACPI_BUS_TYPE_SLEEP_BUTTON:
1123 hid = ACPI_BUTTON_HID_SLEEPF;
1124 break;
1125 }
1126
Alex Chiang0c526d92009-05-14 08:31:37 -06001127 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 * \_SB
1129 * ----
1130 * Fix for the system root bus device -- the only root-level device.
1131 */
Bob Moorec51a4de2005-11-17 13:07:00 -05001132 if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 hid = ACPI_BUS_HID;
1134 strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
1135 strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
1136 }
1137
1138 if (hid) {
Bob Moore15b8dd52009-06-29 13:39:29 +08001139 device->pnp.hardware_id = ACPI_ALLOCATE_ZEROED(strlen (hid) + 1);
1140 if (device->pnp.hardware_id) {
1141 strcpy(device->pnp.hardware_id, hid);
1142 device->flags.hardware_id = 1;
Frank Seidel3620f2f2007-12-07 13:20:34 +01001143 }
Hugh Dickins718fb0d2009-08-06 23:18:12 +00001144 }
1145 if (!device->flags.hardware_id)
1146 device->pnp.hardware_id = "";
Bob Moore15b8dd52009-06-29 13:39:29 +08001147
1148 if (uid) {
1149 device->pnp.unique_id = ACPI_ALLOCATE_ZEROED(strlen (uid) + 1);
1150 if (device->pnp.unique_id) {
1151 strcpy(device->pnp.unique_id, uid);
1152 device->flags.unique_id = 1;
1153 }
Hugh Dickins718fb0d2009-08-06 23:18:12 +00001154 }
1155 if (!device->flags.unique_id)
1156 device->pnp.unique_id = "";
Bob Moore15b8dd52009-06-29 13:39:29 +08001157
1158 if (cid_list || cid_add) {
1159 struct acpica_device_id_list *list;
1160
1161 if (cid_add) {
1162 struct acpica_device_id cid;
1163 cid.length = strlen (cid_add) + 1;
1164 cid.string = cid_add;
1165
1166 list = acpi_add_cid(info, &cid);
1167 } else {
1168 list = acpi_add_cid(info, NULL);
1169 }
Frank Seidel3620f2f2007-12-07 13:20:34 +01001170
1171 if (list) {
Frank Seidel3620f2f2007-12-07 13:20:34 +01001172 device->pnp.cid_list = list;
Bob Moore15b8dd52009-06-29 13:39:29 +08001173 if (cid_add)
1174 device->flags.compatible_ids = 1;
1175 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 }
1177
Bob Moore15b8dd52009-06-29 13:39:29 +08001178 kfree(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179}
1180
Len Brown4be44fc2005-08-05 00:44:28 -04001181static int acpi_device_set_context(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182{
1183 acpi_status status = AE_OK;
1184 int result = 0;
1185 /*
1186 * Context
1187 * -------
1188 * Attach this 'struct acpi_device' to the ACPI object. This makes
1189 * resolutions from handle->device very efficient. Note that we need
1190 * to be careful with fixed-feature devices as they all attach to the
1191 * root object.
1192 */
Len Brown4be44fc2005-08-05 00:44:28 -04001193 if (type != ACPI_BUS_TYPE_POWER_BUTTON &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 type != ACPI_BUS_TYPE_SLEEP_BUTTON) {
1195 status = acpi_attach_data(device->handle,
Len Brown4be44fc2005-08-05 00:44:28 -04001196 acpi_bus_data_handler, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197
1198 if (ACPI_FAILURE(status)) {
Len Brown87ecd5c2008-01-01 14:00:00 -05001199 printk(KERN_ERR PREFIX "Error attaching device data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 result = -ENODEV;
1201 }
1202 }
1203 return result;
1204}
1205
Len Brown4be44fc2005-08-05 00:44:28 -04001206static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 if (!dev)
Patrick Mocheld550d982006-06-27 00:41:40 -04001209 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
Li Shaohua96333572006-12-07 20:56:46 +08001211 dev->removal_type = ACPI_BUS_REMOVAL_EJECT;
Patrick Mochel1890a972006-12-07 20:56:31 +08001212 device_release_driver(&dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
1214 if (!rmdevice)
Patrick Mocheld550d982006-06-27 00:41:40 -04001215 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216
Rui Zhang2786f6e2006-12-21 02:21:13 -05001217 /*
1218 * unbind _ADR-Based Devices when hot removal
1219 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 if (dev->flags.bus_address) {
1221 if ((dev->parent) && (dev->parent->ops.unbind))
1222 dev->parent->ops.unbind(dev);
1223 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
1225
Patrick Mocheld550d982006-06-27 00:41:40 -04001226 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227}
1228
Rajesh Shah3fb02732005-04-28 00:25:52 -07001229static int
Len Brown4be44fc2005-08-05 00:44:28 -04001230acpi_add_single_object(struct acpi_device **child,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001231 struct acpi_device *parent, acpi_handle handle, int type,
1232 struct acpi_bus_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233{
Len Brown4be44fc2005-08-05 00:44:28 -04001234 int result = 0;
1235 struct acpi_device *device = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237
1238 if (!child)
Patrick Mocheld550d982006-06-27 00:41:40 -04001239 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240
Burman Yan36bcbec2006-12-19 12:56:11 -08001241 device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 if (!device) {
Len Brown64684632006-06-26 23:41:38 -04001243 printk(KERN_ERR PREFIX "Memory allocation error\n");
Patrick Mocheld550d982006-06-27 00:41:40 -04001244 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246
1247 device->handle = handle;
1248 device->parent = parent;
Li Shaohuac4168bf2006-12-07 20:56:41 +08001249 device->bus_ops = *ops; /* workround for not call .start */
1250
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251
Len Brown4be44fc2005-08-05 00:44:28 -04001252 acpi_device_get_busid(device, handle, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253
1254 /*
1255 * Flags
1256 * -----
1257 * Get prior to calling acpi_bus_get_status() so we know whether
1258 * or not _STA is present. Note that we only look for object
1259 * handles -- cannot evaluate objects until we know the device is
1260 * present and properly initialized.
1261 */
1262 result = acpi_bus_get_flags(device);
1263 if (result)
1264 goto end;
1265
1266 /*
1267 * Status
1268 * ------
Keiichiro Tokunaga6940fab2005-03-30 23:15:47 -05001269 * See if the device is present. We always assume that non-Device
1270 * and non-Processor objects (e.g. thermal zones, power resources,
1271 * etc.) are present, functioning, etc. (at least when parent object
1272 * is present). Note that _STA has a different meaning for some
1273 * objects (e.g. power resources) so we need to be careful how we use
1274 * it.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 */
1276 switch (type) {
Keiichiro Tokunaga6940fab2005-03-30 23:15:47 -05001277 case ACPI_BUS_TYPE_PROCESSOR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 case ACPI_BUS_TYPE_DEVICE:
1279 result = acpi_bus_get_status(device);
Frank Seidel3620f2f2007-12-07 13:20:34 +01001280 if (ACPI_FAILURE(result)) {
1281 result = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 goto end;
1283 }
Zhao Yakui39a0ad82008-08-11 13:40:22 +08001284 /*
1285 * When the device is neither present nor functional, the
1286 * device should not be added to Linux ACPI device tree.
1287 * When the status of the device is not present but functinal,
1288 * it should be added to Linux ACPI tree. For example : bay
1289 * device , dock device.
1290 * In such conditions it is unncessary to check whether it is
1291 * bay device or dock device.
1292 */
1293 if (!device->status.present && !device->status.functional) {
1294 result = -ENODEV;
1295 goto end;
Frank Seidel3620f2f2007-12-07 13:20:34 +01001296 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 break;
1298 default:
Bjorn Helgaas0c0e8922007-04-25 14:20:58 -04001299 STRUCT_TO_INT(device->status) =
1300 ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
1301 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 break;
1303 }
1304
1305 /*
1306 * Initialize Device
1307 * -----------------
1308 * TBD: Synch with Core's enumeration/initialization process.
1309 */
1310
1311 /*
1312 * Hardware ID, Unique ID, & Bus Address
1313 * -------------------------------------
1314 */
Len Brown4be44fc2005-08-05 00:44:28 -04001315 acpi_device_set_id(device, parent, handle, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316
1317 /*
Zhao Yakuieab4b642008-08-11 14:54:16 +08001318 * The ACPI device is attached to acpi handle before getting
1319 * the power/wakeup/peformance flags. Otherwise OS can't get
1320 * the corresponding ACPI device by the acpi handle in the course
1321 * of getting the power/wakeup/performance flags.
1322 */
1323 result = acpi_device_set_context(device, type);
1324 if (result)
1325 goto end;
1326
1327 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 * Power Management
1329 * ----------------
1330 */
1331 if (device->flags.power_manageable) {
1332 result = acpi_bus_get_power_flags(device);
1333 if (result)
1334 goto end;
1335 }
1336
Len Brown4be44fc2005-08-05 00:44:28 -04001337 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 * Wakeup device management
1339 *-----------------------
1340 */
1341 if (device->flags.wake_capable) {
1342 result = acpi_bus_get_wakeup_device_flags(device);
1343 if (result)
1344 goto end;
1345 }
1346
1347 /*
1348 * Performance Management
1349 * ----------------------
1350 */
1351 if (device->flags.performance_manageable) {
1352 result = acpi_bus_get_perf_flags(device);
1353 if (result)
1354 goto end;
1355 }
1356
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357
Zhang Ruie49bd2dd2006-12-08 17:23:43 +08001358 result = acpi_device_register(device, parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359
1360 /*
Rui Zhang2786f6e2006-12-21 02:21:13 -05001361 * Bind _ADR-Based Devices when hot add
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 */
1363 if (device->flags.bus_address) {
1364 if (device->parent && device->parent->ops.bind)
1365 device->parent->ops.bind(device);
1366 }
1367
Alex Chiang0c526d92009-05-14 08:31:37 -06001368end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 if (!result)
1370 *child = device;
Hugh Dickins718fb0d2009-08-06 23:18:12 +00001371 else
1372 acpi_device_release(&device->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
Patrick Mocheld550d982006-06-27 00:41:40 -04001374 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376
Len Brown4be44fc2005-08-05 00:44:28 -04001377static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378{
Len Brown4be44fc2005-08-05 00:44:28 -04001379 acpi_status status = AE_OK;
1380 struct acpi_device *parent = NULL;
1381 struct acpi_device *child = NULL;
1382 acpi_handle phandle = NULL;
1383 acpi_handle chandle = NULL;
1384 acpi_object_type type = 0;
1385 u32 level = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387
1388 if (!start)
Patrick Mocheld550d982006-06-27 00:41:40 -04001389 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390
1391 parent = start;
1392 phandle = start->handle;
Len Brown4be44fc2005-08-05 00:44:28 -04001393
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 /*
1395 * Parse through the ACPI namespace, identify all 'devices', and
1396 * create a new 'struct acpi_device' for each.
1397 */
1398 while ((level > 0) && parent) {
1399
1400 status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
Len Brown4be44fc2005-08-05 00:44:28 -04001401 chandle, &chandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402
1403 /*
1404 * If this scope is exhausted then move our way back up.
1405 */
1406 if (ACPI_FAILURE(status)) {
1407 level--;
1408 chandle = phandle;
1409 acpi_get_parent(phandle, &phandle);
1410 if (parent->parent)
1411 parent = parent->parent;
1412 continue;
1413 }
1414
1415 status = acpi_get_type(chandle, &type);
1416 if (ACPI_FAILURE(status))
1417 continue;
1418
1419 /*
1420 * If this is a scope object then parse it (depth-first).
1421 */
1422 if (type == ACPI_TYPE_LOCAL_SCOPE) {
1423 level++;
1424 phandle = chandle;
1425 chandle = NULL;
1426 continue;
1427 }
1428
1429 /*
1430 * We're only interested in objects that we consider 'devices'.
1431 */
1432 switch (type) {
1433 case ACPI_TYPE_DEVICE:
1434 type = ACPI_BUS_TYPE_DEVICE;
1435 break;
1436 case ACPI_TYPE_PROCESSOR:
1437 type = ACPI_BUS_TYPE_PROCESSOR;
1438 break;
1439 case ACPI_TYPE_THERMAL:
1440 type = ACPI_BUS_TYPE_THERMAL;
1441 break;
1442 case ACPI_TYPE_POWER:
1443 type = ACPI_BUS_TYPE_POWER;
1444 break;
1445 default:
1446 continue;
1447 }
1448
Rajesh Shah3fb02732005-04-28 00:25:52 -07001449 if (ops->acpi_op_add)
1450 status = acpi_add_single_object(&child, parent,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001451 chandle, type, ops);
Len Brown4be44fc2005-08-05 00:44:28 -04001452 else
Rajesh Shah3fb02732005-04-28 00:25:52 -07001453 status = acpi_bus_get_device(chandle, &child);
1454
Len Brown4be44fc2005-08-05 00:44:28 -04001455 if (ACPI_FAILURE(status))
1456 continue;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001457
Li Shaohuac4168bf2006-12-07 20:56:41 +08001458 if (ops->acpi_op_start && !(ops->acpi_op_add)) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001459 status = acpi_start_single_object(child);
1460 if (ACPI_FAILURE(status))
1461 continue;
1462 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463
1464 /*
1465 * If the device is present, enabled, and functioning then
1466 * parse its scope (depth-first). Note that we need to
1467 * represent absent devices to facilitate PnP notifications
1468 * -- but only the subtree head (not all of its children,
1469 * which will be enumerated when the parent is inserted).
1470 *
1471 * TBD: Need notifications and other detection mechanisms
Len Brown4be44fc2005-08-05 00:44:28 -04001472 * in place before we can fully implement this.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 */
Zhao Yakui39a0ad82008-08-11 13:40:22 +08001474 /*
1475 * When the device is not present but functional, it is also
1476 * necessary to scan the children of this device.
1477 */
1478 if (child->status.present || (!child->status.present &&
1479 child->status.functional)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
1481 NULL, NULL);
1482 if (ACPI_SUCCESS(status)) {
1483 level++;
1484 phandle = chandle;
1485 chandle = NULL;
1486 parent = child;
1487 }
1488 }
1489 }
1490
Patrick Mocheld550d982006-06-27 00:41:40 -04001491 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
Rajesh Shah3fb02732005-04-28 00:25:52 -07001494int
Len Brown4be44fc2005-08-05 00:44:28 -04001495acpi_bus_add(struct acpi_device **child,
1496 struct acpi_device *parent, acpi_handle handle, int type)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001497{
1498 int result;
1499 struct acpi_bus_ops ops;
1500
Li Shaohuac4168bf2006-12-07 20:56:41 +08001501 memset(&ops, 0, sizeof(ops));
1502 ops.acpi_op_add = 1;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001503
Li Shaohuac4168bf2006-12-07 20:56:41 +08001504 result = acpi_add_single_object(child, parent, handle, type, &ops);
1505 if (!result)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001506 result = acpi_bus_scan(*child, &ops);
Li Shaohuac4168bf2006-12-07 20:56:41 +08001507
Patrick Mocheld550d982006-06-27 00:41:40 -04001508 return result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001509}
1510EXPORT_SYMBOL(acpi_bus_add);
1511
Len Brown4be44fc2005-08-05 00:44:28 -04001512int acpi_bus_start(struct acpi_device *device)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001513{
1514 int result;
1515 struct acpi_bus_ops ops;
1516
Rajesh Shah3fb02732005-04-28 00:25:52 -07001517
1518 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001519 return -EINVAL;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001520
1521 result = acpi_start_single_object(device);
1522 if (!result) {
1523 memset(&ops, 0, sizeof(ops));
1524 ops.acpi_op_start = 1;
1525 result = acpi_bus_scan(device, &ops);
1526 }
Patrick Mocheld550d982006-06-27 00:41:40 -04001527 return result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001528}
1529EXPORT_SYMBOL(acpi_bus_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
Kristen Accardiceaba662006-02-23 17:56:01 -08001531int acpi_bus_trim(struct acpi_device *start, int rmdevice)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532{
Len Brown4be44fc2005-08-05 00:44:28 -04001533 acpi_status status;
1534 struct acpi_device *parent, *child;
1535 acpi_handle phandle, chandle;
1536 acpi_object_type type;
1537 u32 level = 1;
1538 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539
Len Brown4be44fc2005-08-05 00:44:28 -04001540 parent = start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541 phandle = start->handle;
1542 child = chandle = NULL;
1543
1544 while ((level > 0) && parent && (!err)) {
1545 status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
Len Brown4be44fc2005-08-05 00:44:28 -04001546 chandle, &chandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
1548 /*
1549 * If this scope is exhausted then move our way back up.
1550 */
1551 if (ACPI_FAILURE(status)) {
1552 level--;
1553 chandle = phandle;
1554 acpi_get_parent(phandle, &phandle);
1555 child = parent;
1556 parent = parent->parent;
1557
1558 if (level == 0)
1559 err = acpi_bus_remove(child, rmdevice);
1560 else
1561 err = acpi_bus_remove(child, 1);
1562
1563 continue;
1564 }
1565
1566 status = acpi_get_type(chandle, &type);
1567 if (ACPI_FAILURE(status)) {
1568 continue;
1569 }
1570 /*
1571 * If there is a device corresponding to chandle then
1572 * parse it (depth-first).
1573 */
1574 if (acpi_bus_get_device(chandle, &child) == 0) {
1575 level++;
1576 phandle = chandle;
1577 chandle = NULL;
1578 parent = child;
1579 }
1580 continue;
1581 }
1582 return err;
1583}
Kristen Accardiceaba662006-02-23 17:56:01 -08001584EXPORT_SYMBOL_GPL(acpi_bus_trim);
1585
Len Brown4be44fc2005-08-05 00:44:28 -04001586static int acpi_bus_scan_fixed(struct acpi_device *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587{
Len Brown4be44fc2005-08-05 00:44:28 -04001588 int result = 0;
1589 struct acpi_device *device = NULL;
Li Shaohuac4168bf2006-12-07 20:56:41 +08001590 struct acpi_bus_ops ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591
1592 if (!root)
Patrick Mocheld550d982006-06-27 00:41:40 -04001593 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594
Li Shaohuac4168bf2006-12-07 20:56:41 +08001595 memset(&ops, 0, sizeof(ops));
1596 ops.acpi_op_add = 1;
1597 ops.acpi_op_start = 1;
1598
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 /*
1600 * Enumerate all fixed-feature devices.
1601 */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +03001602 if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001603 result = acpi_add_single_object(&device, acpi_root,
Len Brown4be44fc2005-08-05 00:44:28 -04001604 NULL,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001605 ACPI_BUS_TYPE_POWER_BUTTON,
1606 &ops);
Rajesh Shah3fb02732005-04-28 00:25:52 -07001607 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608
Alexey Starikovskiycee324b2007-02-02 19:48:22 +03001609 if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001610 result = acpi_add_single_object(&device, acpi_root,
Len Brown4be44fc2005-08-05 00:44:28 -04001611 NULL,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001612 ACPI_BUS_TYPE_SLEEP_BUTTON,
1613 &ops);
Rajesh Shah3fb02732005-04-28 00:25:52 -07001614 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615
Patrick Mocheld550d982006-06-27 00:41:40 -04001616 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617}
1618
Bjorn Helgaase747f272009-03-24 16:49:43 -06001619int __init acpi_scan_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620{
1621 int result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001622 struct acpi_bus_ops ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623
Li Shaohuac4168bf2006-12-07 20:56:41 +08001624 memset(&ops, 0, sizeof(ops));
1625 ops.acpi_op_add = 1;
1626 ops.acpi_op_start = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627
Patrick Mochel5b327262006-05-10 10:33:00 -04001628 result = bus_register(&acpi_bus_type);
1629 if (result) {
1630 /* We don't want to quit even if we failed to add suspend/resume */
1631 printk(KERN_ERR PREFIX "Could not register bus type\n");
1632 }
1633
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634 /*
1635 * Create the root device in the bus's device tree
1636 */
Rajesh Shah3fb02732005-04-28 00:25:52 -07001637 result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001638 ACPI_BUS_TYPE_SYSTEM, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 if (result)
1640 goto Done;
1641
1642 /*
1643 * Enumerate devices in the ACPI namespace.
1644 */
1645 result = acpi_bus_scan_fixed(acpi_root);
Alexey Starikovskiyc04209a2008-01-01 14:12:55 -05001646
Li Shaohuac4168bf2006-12-07 20:56:41 +08001647 if (!result)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001648 result = acpi_bus_scan(acpi_root, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649
1650 if (result)
1651 acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
1652
Alex Chiang0c526d92009-05-14 08:31:37 -06001653Done:
Patrick Mocheld550d982006-06-27 00:41:40 -04001654 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655}