blob: 9606af13d3b80c1a8c1b0be83cf6b47199b338a1 [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);
312 kfree(acpi_dev);
313}
314
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800315static int acpi_device_suspend(struct device *dev, pm_message_t state)
Zhang Rui9e89dde2006-12-07 20:56:16 +0800316{
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800317 struct acpi_device *acpi_dev = to_acpi_device(dev);
318 struct acpi_driver *acpi_drv = acpi_dev->driver;
Zhang Rui9e89dde2006-12-07 20:56:16 +0800319
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800320 if (acpi_drv && acpi_drv->ops.suspend)
321 return acpi_drv->ops.suspend(acpi_dev, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 return 0;
323}
324
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800325static int acpi_device_resume(struct device *dev)
326{
327 struct acpi_device *acpi_dev = to_acpi_device(dev);
328 struct acpi_driver *acpi_drv = acpi_dev->driver;
329
330 if (acpi_drv && acpi_drv->ops.resume)
331 return acpi_drv->ops.resume(acpi_dev);
332 return 0;
333}
334
335static int acpi_bus_match(struct device *dev, struct device_driver *drv)
336{
337 struct acpi_device *acpi_dev = to_acpi_device(dev);
338 struct acpi_driver *acpi_drv = to_acpi_driver(drv);
339
Thomas Renninger29b71a12007-07-23 14:43:51 +0200340 return !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800341}
342
Kay Sievers7eff2e72007-08-14 15:15:12 +0200343static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800344{
345 struct acpi_device *acpi_dev = to_acpi_device(dev);
Kay Sievers7eff2e72007-08-14 15:15:12 +0200346 int len;
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800347
Kay Sievers7eff2e72007-08-14 15:15:12 +0200348 if (add_uevent_var(env, "MODALIAS="))
349 return -ENOMEM;
350 len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],
351 sizeof(env->buf) - env->buflen);
352 if (len >= (sizeof(env->buf) - env->buflen))
353 return -ENOMEM;
354 env->buflen += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 return 0;
356}
357
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000358static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
359{
360 struct acpi_device *device = data;
361
362 device->driver->ops.notify(device, event);
363}
364
365static acpi_status acpi_device_notify_fixed(void *data)
366{
367 struct acpi_device *device = data;
368
369 acpi_device_notify(device->handle, ACPI_FIXED_HARDWARE_EVENT, device);
370 return AE_OK;
371}
372
373static int acpi_device_install_notify_handler(struct acpi_device *device)
374{
375 acpi_status status;
376 char *hid;
377
378 hid = acpi_device_hid(device);
379 if (!strcmp(hid, ACPI_BUTTON_HID_POWERF))
380 status =
381 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
382 acpi_device_notify_fixed,
383 device);
384 else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEPF))
385 status =
386 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
387 acpi_device_notify_fixed,
388 device);
389 else
390 status = acpi_install_notify_handler(device->handle,
391 ACPI_DEVICE_NOTIFY,
392 acpi_device_notify,
393 device);
394
395 if (ACPI_FAILURE(status))
396 return -EINVAL;
397 return 0;
398}
399
400static void acpi_device_remove_notify_handler(struct acpi_device *device)
401{
402 if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF))
403 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
404 acpi_device_notify_fixed);
405 else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF))
406 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
407 acpi_device_notify_fixed);
408 else
409 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
410 acpi_device_notify);
411}
412
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800413static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
414static int acpi_start_single_object(struct acpi_device *);
415static int acpi_device_probe(struct device * dev)
Zhang Rui9e89dde2006-12-07 20:56:16 +0800416{
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800417 struct acpi_device *acpi_dev = to_acpi_device(dev);
418 struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
419 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800421 ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
422 if (!ret) {
Li Shaohuac4168bf2006-12-07 20:56:41 +0800423 if (acpi_dev->bus_ops.acpi_op_start)
424 acpi_start_single_object(acpi_dev);
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000425
426 if (acpi_drv->ops.notify) {
427 ret = acpi_device_install_notify_handler(acpi_dev);
428 if (ret) {
429 if (acpi_drv->ops.stop)
430 acpi_drv->ops.stop(acpi_dev,
431 acpi_dev->removal_type);
432 if (acpi_drv->ops.remove)
433 acpi_drv->ops.remove(acpi_dev,
434 acpi_dev->removal_type);
435 return ret;
436 }
437 }
438
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800439 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
440 "Found driver [%s] for device [%s]\n",
441 acpi_drv->name, acpi_dev->pnp.bus_id));
442 get_device(dev);
Zhang Rui9e89dde2006-12-07 20:56:16 +0800443 }
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800444 return ret;
445}
446
447static int acpi_device_remove(struct device * dev)
448{
449 struct acpi_device *acpi_dev = to_acpi_device(dev);
450 struct acpi_driver *acpi_drv = acpi_dev->driver;
451
452 if (acpi_drv) {
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000453 if (acpi_drv->ops.notify)
454 acpi_device_remove_notify_handler(acpi_dev);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800455 if (acpi_drv->ops.stop)
Li Shaohua96333572006-12-07 20:56:46 +0800456 acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800457 if (acpi_drv->ops.remove)
Li Shaohua96333572006-12-07 20:56:46 +0800458 acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800459 }
460 acpi_dev->driver = NULL;
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700461 acpi_dev->driver_data = NULL;
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800462
463 put_device(dev);
Zhang Rui9e89dde2006-12-07 20:56:16 +0800464 return 0;
465}
466
David Brownell55955aa2007-05-08 00:28:35 -0700467struct bus_type acpi_bus_type = {
Zhang Rui9e89dde2006-12-07 20:56:16 +0800468 .name = "acpi",
469 .suspend = acpi_device_suspend,
470 .resume = acpi_device_resume,
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800471 .match = acpi_bus_match,
472 .probe = acpi_device_probe,
473 .remove = acpi_device_remove,
474 .uevent = acpi_device_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475};
476
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800477static int acpi_device_register(struct acpi_device *device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 struct acpi_device *parent)
479{
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800480 int result;
481 struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
482 int found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 /*
484 * Linkage
485 * -------
486 * Link this device to its parent and siblings.
487 */
488 INIT_LIST_HEAD(&device->children);
489 INIT_LIST_HEAD(&device->node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 INIT_LIST_HEAD(&device->wakeup_list);
491
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800492 new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
493 if (!new_bus_id) {
494 printk(KERN_ERR PREFIX "Memory allocation error\n");
495 return -ENOMEM;
496 }
497
Shaohua Li90905892009-04-07 10:24:29 +0800498 mutex_lock(&acpi_device_lock);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800499 /*
500 * Find suitable bus_id and instance number in acpi_bus_id_list
501 * If failed, create one and link it into acpi_bus_id_list
502 */
503 list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) {
Zhang Ruibb095852007-01-04 15:03:18 +0800504 if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) {
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800505 acpi_device_bus_id->instance_no ++;
506 found = 1;
507 kfree(new_bus_id);
508 break;
509 }
510 }
Alex Chiang0c526d92009-05-14 08:31:37 -0600511 if (!found) {
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800512 acpi_device_bus_id = new_bus_id;
Zhang Ruibb095852007-01-04 15:03:18 +0800513 strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device");
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800514 acpi_device_bus_id->instance_no = 0;
515 list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list);
516 }
Kay Sievers07944692008-10-30 01:18:59 +0100517 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 +0800518
Len Brown33b57152008-12-15 22:09:26 -0500519 if (device->parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 list_add_tail(&device->node, &device->parent->children);
Len Brown33b57152008-12-15 22:09:26 -0500521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if (device->wakeup.flags.valid)
523 list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
Shaohua Li90905892009-04-07 10:24:29 +0800524 mutex_unlock(&acpi_device_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Patrick Mochel1890a972006-12-07 20:56:31 +0800526 if (device->parent)
527 device->dev.parent = &parent->dev;
528 device->dev.bus = &acpi_bus_type;
Patrick Mochel1890a972006-12-07 20:56:31 +0800529 device->dev.release = &acpi_device_release;
Alex Chiang8b12b922009-05-14 08:31:32 -0600530 result = device_register(&device->dev);
Alex Chiang0c526d92009-05-14 08:31:37 -0600531 if (result) {
Alex Chiang8b12b922009-05-14 08:31:32 -0600532 dev_err(&device->dev, "Error registering device\n");
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800533 goto end;
534 }
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800535
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800536 result = acpi_device_setup_files(device);
Alex Chiang0c526d92009-05-14 08:31:37 -0600537 if (result)
Kay Sievers07944692008-10-30 01:18:59 +0100538 printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n",
539 dev_name(&device->dev));
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800540
Li Shaohua96333572006-12-07 20:56:46 +0800541 device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800542 return 0;
Alex Chiang0c526d92009-05-14 08:31:37 -0600543end:
Shaohua Li90905892009-04-07 10:24:29 +0800544 mutex_lock(&acpi_device_lock);
Len Brown33b57152008-12-15 22:09:26 -0500545 if (device->parent)
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800546 list_del(&device->node);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800547 list_del(&device->wakeup_list);
Shaohua Li90905892009-04-07 10:24:29 +0800548 mutex_unlock(&acpi_device_lock);
Zhang Ruie49bd2dd2006-12-08 17:23:43 +0800549 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550}
551
552static void acpi_device_unregister(struct acpi_device *device, int type)
553{
Shaohua Li90905892009-04-07 10:24:29 +0800554 mutex_lock(&acpi_device_lock);
Len Brown33b57152008-12-15 22:09:26 -0500555 if (device->parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 list_del(&device->node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558 list_del(&device->wakeup_list);
Shaohua Li90905892009-04-07 10:24:29 +0800559 mutex_unlock(&acpi_device_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
561 acpi_detach_data(device->handle, acpi_bus_data_handler);
Patrick Mochel1890a972006-12-07 20:56:31 +0800562
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800563 acpi_device_remove_files(device);
Patrick Mochel1890a972006-12-07 20:56:31 +0800564 device_unregister(&device->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565}
566
Zhang Rui9e89dde2006-12-07 20:56:16 +0800567/* --------------------------------------------------------------------------
568 Driver Management
569 -------------------------------------------------------------------------- */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500571 * acpi_bus_driver_init - add a device to a driver
572 * @device: the device to add and initialize
573 * @driver: driver for the device
574 *
Alex Chiang0c526d92009-05-14 08:31:37 -0600575 * Used to initialize a device via its device driver. Called whenever a
Patrick Mochel1890a972006-12-07 20:56:31 +0800576 * driver is bound to a device. Invokes the driver's add() ops.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 */
578static int
Len Brown4be44fc2005-08-05 00:44:28 -0400579acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580{
Len Brown4be44fc2005-08-05 00:44:28 -0400581 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (!device || !driver)
Patrick Mocheld550d982006-06-27 00:41:40 -0400584 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
586 if (!driver->ops.add)
Patrick Mocheld550d982006-06-27 00:41:40 -0400587 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
589 result = driver->ops.add(device);
590 if (result) {
591 device->driver = NULL;
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700592 device->driver_data = NULL;
Patrick Mocheld550d982006-06-27 00:41:40 -0400593 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 }
595
596 device->driver = driver;
597
598 /*
599 * TBD - Configuration Management: Assign resources to device based
600 * upon possible configuration and currently allocated resources.
601 */
602
Len Brown4be44fc2005-08-05 00:44:28 -0400603 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
604 "Driver successfully bound to device\n"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400605 return 0;
Rajesh Shah3fb02732005-04-28 00:25:52 -0700606}
607
Adrian Bunk8713cbe2005-09-02 17:16:48 -0400608static int acpi_start_single_object(struct acpi_device *device)
Rajesh Shah3fb02732005-04-28 00:25:52 -0700609{
610 int result = 0;
611 struct acpi_driver *driver;
612
Rajesh Shah3fb02732005-04-28 00:25:52 -0700613
614 if (!(driver = device->driver))
Patrick Mocheld550d982006-06-27 00:41:40 -0400615 return 0;
Rajesh Shah3fb02732005-04-28 00:25:52 -0700616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 if (driver->ops.start) {
618 result = driver->ops.start(device);
619 if (result && driver->ops.remove)
620 driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 }
622
Patrick Mocheld550d982006-06-27 00:41:40 -0400623 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624}
625
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500627 * acpi_bus_register_driver - register a driver with the ACPI bus
628 * @driver: driver being registered
629 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 * Registers a driver with the ACPI bus. Searches the namespace for all
Bjorn Helgaas9d9f7492006-03-28 17:04:00 -0500631 * devices that match the driver's criteria and binds. Returns zero for
632 * success or a negative error status for failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 */
Len Brown4be44fc2005-08-05 00:44:28 -0400634int acpi_bus_register_driver(struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635{
Patrick Mochel1890a972006-12-07 20:56:31 +0800636 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
638 if (acpi_disabled)
Patrick Mocheld550d982006-06-27 00:41:40 -0400639 return -ENODEV;
Patrick Mochel1890a972006-12-07 20:56:31 +0800640 driver->drv.name = driver->name;
641 driver->drv.bus = &acpi_bus_type;
642 driver->drv.owner = driver->owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
Patrick Mochel1890a972006-12-07 20:56:31 +0800644 ret = driver_register(&driver->drv);
645 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
Len Brown4be44fc2005-08-05 00:44:28 -0400648EXPORT_SYMBOL(acpi_bus_register_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
650/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500651 * acpi_bus_unregister_driver - unregisters a driver with the APIC bus
652 * @driver: driver to unregister
653 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 * Unregisters a driver with the ACPI bus. Searches the namespace for all
655 * devices that match the driver's criteria and unbinds.
656 */
Bjorn Helgaas06ea8e082006-04-27 05:25:00 -0400657void acpi_bus_unregister_driver(struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658{
Patrick Mochel1890a972006-12-07 20:56:31 +0800659 driver_unregister(&driver->drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660}
Len Brown4be44fc2005-08-05 00:44:28 -0400661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662EXPORT_SYMBOL(acpi_bus_unregister_driver);
663
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664/* --------------------------------------------------------------------------
665 Device Enumeration
666 -------------------------------------------------------------------------- */
Len Brownc8f7a622006-07-09 17:22:28 -0400667acpi_status
668acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd)
669{
670 acpi_status status;
671 acpi_handle tmp;
672 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
673 union acpi_object *obj;
674
675 status = acpi_get_handle(handle, "_EJD", &tmp);
676 if (ACPI_FAILURE(status))
677 return status;
678
679 status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer);
680 if (ACPI_SUCCESS(status)) {
681 obj = buffer.pointer;
Holger Macht3b5fee52008-02-14 13:40:34 +0100682 status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer,
683 ejd);
Len Brownc8f7a622006-07-09 17:22:28 -0400684 kfree(buffer.pointer);
685 }
686 return status;
687}
688EXPORT_SYMBOL_GPL(acpi_bus_get_ejd);
689
Bob Moore8e4319c2009-06-29 13:43:27 +0800690void acpi_bus_data_handler(acpi_handle handle, void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{
692
693 /* TBD */
694
695 return;
696}
697
Zhang Rui9e89dde2006-12-07 20:56:16 +0800698static int acpi_bus_get_perf_flags(struct acpi_device *device)
699{
700 device->performance.state = ACPI_STATE_UNKNOWN;
701 return 0;
702}
703
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704static acpi_status
705acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
706 union acpi_object *package)
707{
708 int i = 0;
709 union acpi_object *element = NULL;
710
711 if (!device || !package || (package->package.count < 2))
712 return AE_BAD_PARAMETER;
713
714 element = &(package->package.elements[0]);
715 if (!element)
716 return AE_BAD_PARAMETER;
717 if (element->type == ACPI_TYPE_PACKAGE) {
718 if ((element->package.count < 2) ||
719 (element->package.elements[0].type !=
720 ACPI_TYPE_LOCAL_REFERENCE)
721 || (element->package.elements[1].type != ACPI_TYPE_INTEGER))
722 return AE_BAD_DATA;
723 device->wakeup.gpe_device =
724 element->package.elements[0].reference.handle;
725 device->wakeup.gpe_number =
726 (u32) element->package.elements[1].integer.value;
727 } else if (element->type == ACPI_TYPE_INTEGER) {
728 device->wakeup.gpe_number = element->integer.value;
729 } else
730 return AE_BAD_DATA;
731
732 element = &(package->package.elements[1]);
733 if (element->type != ACPI_TYPE_INTEGER) {
734 return AE_BAD_DATA;
735 }
736 device->wakeup.sleep_state = element->integer.value;
737
738 if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
739 return AE_NO_MEMORY;
740 }
741 device->wakeup.resources.count = package->package.count - 2;
742 for (i = 0; i < device->wakeup.resources.count; i++) {
743 element = &(package->package.elements[i + 2]);
Bob Moorecd0b2242008-04-10 19:06:43 +0400744 if (element->type != ACPI_TYPE_LOCAL_REFERENCE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 return AE_BAD_DATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746
747 device->wakeup.resources.handles[i] = element->reference.handle;
748 }
749
750 return AE_OK;
751}
752
753static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
754{
755 acpi_status status = 0;
756 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
757 union acpi_object *package = NULL;
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200758 int psw_error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
Thomas Renninger29b71a12007-07-23 14:43:51 +0200760 struct acpi_device_id button_device_ids[] = {
761 {"PNP0C0D", 0},
762 {"PNP0C0C", 0},
763 {"PNP0C0E", 0},
764 {"", 0},
765 };
766
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 /* _PRW */
768 status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
769 if (ACPI_FAILURE(status)) {
770 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
771 goto end;
772 }
773
774 package = (union acpi_object *)buffer.pointer;
775 status = acpi_bus_extract_wakeup_device_power_package(device, package);
776 if (ACPI_FAILURE(status)) {
777 ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
778 goto end;
779 }
780
781 kfree(buffer.pointer);
782
783 device->wakeup.flags.valid = 1;
Zhao Yakui729b2bd2008-03-19 13:26:54 +0800784 /* Call _PSW/_DSW object to disable its ability to wake the sleeping
785 * system for the ACPI device with the _PRW object.
786 * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
787 * So it is necessary to call _DSW object first. Only when it is not
788 * present will the _PSW object used.
789 */
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200790 psw_error = acpi_device_sleep_wake(device, 0, 0, 0);
791 if (psw_error)
792 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
793 "error in _DSW or _PSW evaluation\n"));
794
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 /* Power button, Lid switch always enable wakeup */
Thomas Renninger29b71a12007-07-23 14:43:51 +0200796 if (!acpi_match_device_ids(device, button_device_ids))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 device->wakeup.flags.run_wake = 1;
798
Alex Chiang0c526d92009-05-14 08:31:37 -0600799end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 if (ACPI_FAILURE(status))
801 device->flags.wake_capable = 0;
802 return 0;
803}
804
Zhang Rui9e89dde2006-12-07 20:56:16 +0800805static int acpi_bus_get_power_flags(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806{
Zhang Rui9e89dde2006-12-07 20:56:16 +0800807 acpi_status status = 0;
808 acpi_handle handle = NULL;
809 u32 i = 0;
810
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
812 /*
Zhang Rui9e89dde2006-12-07 20:56:16 +0800813 * Power Management Flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 */
Zhang Rui9e89dde2006-12-07 20:56:16 +0800815 status = acpi_get_handle(device->handle, "_PSC", &handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 if (ACPI_SUCCESS(status))
Zhang Rui9e89dde2006-12-07 20:56:16 +0800817 device->power.flags.explicit_get = 1;
818 status = acpi_get_handle(device->handle, "_IRC", &handle);
819 if (ACPI_SUCCESS(status))
820 device->power.flags.inrush_current = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 /*
Zhang Rui9e89dde2006-12-07 20:56:16 +0800823 * Enumerate supported power management states
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 */
Zhang Rui9e89dde2006-12-07 20:56:16 +0800825 for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
826 struct acpi_device_power_state *ps = &device->power.states[i];
827 char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828
Zhang Rui9e89dde2006-12-07 20:56:16 +0800829 /* Evaluate "_PRx" to se if power resources are referenced */
830 acpi_evaluate_reference(device->handle, object_name, NULL,
831 &ps->resources);
832 if (ps->resources.count) {
833 device->power.flags.power_resources = 1;
834 ps->flags.valid = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836
Zhang Rui9e89dde2006-12-07 20:56:16 +0800837 /* Evaluate "_PSx" to see if we can do explicit sets */
838 object_name[2] = 'S';
839 status = acpi_get_handle(device->handle, object_name, &handle);
840 if (ACPI_SUCCESS(status)) {
841 ps->flags.explicit_set = 1;
842 ps->flags.valid = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 }
Zhang Rui9e89dde2006-12-07 20:56:16 +0800844
845 /* State is valid if we have some power control */
846 if (ps->resources.count || ps->flags.explicit_set)
847 ps->flags.valid = 1;
848
849 ps->power = -1; /* Unknown - driver assigned */
850 ps->latency = -1; /* Unknown - driver assigned */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Zhang Rui9e89dde2006-12-07 20:56:16 +0800853 /* Set defaults for D0 and D3 states (always valid) */
854 device->power.states[ACPI_STATE_D0].flags.valid = 1;
855 device->power.states[ACPI_STATE_D0].power = 100;
856 device->power.states[ACPI_STATE_D3].flags.valid = 1;
857 device->power.states[ACPI_STATE_D3].power = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
Zhang Rui9e89dde2006-12-07 20:56:16 +0800859 /* TBD: System wake support and resource requirements. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
Zhang Rui9e89dde2006-12-07 20:56:16 +0800861 device->power.state = ACPI_STATE_UNKNOWN;
Zhao Yakuia51e1452008-08-11 14:55:05 +0800862 acpi_bus_get_power(device->handle, &(device->power.state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
864 return 0;
865}
866
Len Brown4be44fc2005-08-05 00:44:28 -0400867static int acpi_bus_get_flags(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868{
Len Brown4be44fc2005-08-05 00:44:28 -0400869 acpi_status status = AE_OK;
870 acpi_handle temp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
873 /* Presence of _STA indicates 'dynamic_status' */
874 status = acpi_get_handle(device->handle, "_STA", &temp);
875 if (ACPI_SUCCESS(status))
876 device->flags.dynamic_status = 1;
877
878 /* Presence of _CID indicates 'compatible_ids' */
879 status = acpi_get_handle(device->handle, "_CID", &temp);
880 if (ACPI_SUCCESS(status))
881 device->flags.compatible_ids = 1;
882
883 /* Presence of _RMV indicates 'removable' */
884 status = acpi_get_handle(device->handle, "_RMV", &temp);
885 if (ACPI_SUCCESS(status))
886 device->flags.removable = 1;
887
888 /* Presence of _EJD|_EJ0 indicates 'ejectable' */
889 status = acpi_get_handle(device->handle, "_EJD", &temp);
890 if (ACPI_SUCCESS(status))
891 device->flags.ejectable = 1;
892 else {
893 status = acpi_get_handle(device->handle, "_EJ0", &temp);
894 if (ACPI_SUCCESS(status))
895 device->flags.ejectable = 1;
896 }
897
898 /* Presence of _LCK indicates 'lockable' */
899 status = acpi_get_handle(device->handle, "_LCK", &temp);
900 if (ACPI_SUCCESS(status))
901 device->flags.lockable = 1;
902
903 /* Presence of _PS0|_PR0 indicates 'power manageable' */
904 status = acpi_get_handle(device->handle, "_PS0", &temp);
905 if (ACPI_FAILURE(status))
906 status = acpi_get_handle(device->handle, "_PR0", &temp);
907 if (ACPI_SUCCESS(status))
908 device->flags.power_manageable = 1;
909
910 /* Presence of _PRW indicates wake capable */
911 status = acpi_get_handle(device->handle, "_PRW", &temp);
912 if (ACPI_SUCCESS(status))
913 device->flags.wake_capable = 1;
914
Joe Perches3c5f9be42008-02-03 17:06:17 +0200915 /* TBD: Performance management */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916
Patrick Mocheld550d982006-06-27 00:41:40 -0400917 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918}
919
Len Brown4be44fc2005-08-05 00:44:28 -0400920static void acpi_device_get_busid(struct acpi_device *device,
921 acpi_handle handle, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922{
Len Brown4be44fc2005-08-05 00:44:28 -0400923 char bus_id[5] = { '?', 0 };
924 struct acpi_buffer buffer = { sizeof(bus_id), bus_id };
925 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926
927 /*
928 * Bus ID
929 * ------
930 * The device's Bus ID is simply the object name.
931 * TBD: Shouldn't this value be unique (within the ACPI namespace)?
932 */
933 switch (type) {
934 case ACPI_BUS_TYPE_SYSTEM:
935 strcpy(device->pnp.bus_id, "ACPI");
936 break;
937 case ACPI_BUS_TYPE_POWER_BUTTON:
938 strcpy(device->pnp.bus_id, "PWRF");
939 break;
940 case ACPI_BUS_TYPE_SLEEP_BUTTON:
941 strcpy(device->pnp.bus_id, "SLPF");
942 break;
943 default:
944 acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
945 /* Clean up trailing underscores (if any) */
946 for (i = 3; i > 1; i--) {
947 if (bus_id[i] == '_')
948 bus_id[i] = '\0';
949 else
950 break;
951 }
952 strcpy(device->pnp.bus_id, bus_id);
953 break;
954 }
955}
956
Zhang Rui54735262007-01-11 02:09:09 -0500957/*
958 * acpi_bay_match - see if a device is an ejectable driver bay
959 *
960 * If an acpi object is ejectable and has one of the ACPI ATA methods defined,
961 * then we can safely call it an ejectable drive bay
962 */
963static int acpi_bay_match(struct acpi_device *device){
964 acpi_status status;
965 acpi_handle handle;
966 acpi_handle tmp;
967 acpi_handle phandle;
968
969 handle = device->handle;
970
971 status = acpi_get_handle(handle, "_EJ0", &tmp);
972 if (ACPI_FAILURE(status))
973 return -ENODEV;
974
975 if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
976 (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
977 (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
978 (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
979 return 0;
980
981 if (acpi_get_parent(handle, &phandle))
982 return -ENODEV;
983
984 if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
985 (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
986 (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
987 (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
988 return 0;
989
990 return -ENODEV;
991}
992
Frank Seidel3620f2f2007-12-07 13:20:34 +0100993/*
994 * acpi_dock_match - see if a device has a _DCK method
995 */
996static int acpi_dock_match(struct acpi_device *device)
997{
998 acpi_handle tmp;
999 return acpi_get_handle(device->handle, "_DCK", &tmp);
1000}
1001
Bob Moore15b8dd52009-06-29 13:39:29 +08001002static struct acpica_device_id_list*
1003acpi_add_cid(
1004 struct acpi_device_info *info,
1005 struct acpica_device_id *new_cid)
1006{
1007 struct acpica_device_id_list *cid;
1008 char *next_id_string;
1009 acpi_size cid_length;
1010 acpi_size new_cid_length;
1011 u32 i;
1012
1013
1014 /* Allocate new CID list with room for the new CID */
1015
1016 if (!new_cid)
1017 new_cid_length = info->compatible_id_list.list_size;
1018 else if (info->compatible_id_list.list_size)
1019 new_cid_length = info->compatible_id_list.list_size +
1020 new_cid->length + sizeof(struct acpica_device_id);
1021 else
1022 new_cid_length = sizeof(struct acpica_device_id_list) + new_cid->length;
1023
1024 cid = ACPI_ALLOCATE_ZEROED(new_cid_length);
1025 if (!cid) {
1026 return NULL;
1027 }
1028
1029 cid->list_size = new_cid_length;
1030 cid->count = info->compatible_id_list.count;
1031 if (new_cid)
1032 cid->count++;
1033 next_id_string = (char *) cid->ids + (cid->count * sizeof(struct acpica_device_id));
1034
1035 /* Copy all existing CIDs */
1036
1037 for (i = 0; i < info->compatible_id_list.count; i++) {
1038 cid_length = info->compatible_id_list.ids[i].length;
1039 cid->ids[i].string = next_id_string;
1040 cid->ids[i].length = cid_length;
1041
1042 ACPI_MEMCPY(next_id_string, info->compatible_id_list.ids[i].string,
1043 cid_length);
1044
1045 next_id_string += cid_length;
1046 }
1047
1048 /* Append the new CID */
1049
1050 if (new_cid) {
1051 cid->ids[i].string = next_id_string;
1052 cid->ids[i].length = new_cid->length;
1053
1054 ACPI_MEMCPY(next_id_string, new_cid->string, new_cid->length);
1055 }
1056
1057 return cid;
1058}
1059
Len Brown4be44fc2005-08-05 00:44:28 -04001060static void acpi_device_set_id(struct acpi_device *device,
1061 struct acpi_device *parent, acpi_handle handle,
1062 int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063{
Bob Moore15b8dd52009-06-29 13:39:29 +08001064 struct acpi_device_info *info = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -04001065 char *hid = NULL;
1066 char *uid = NULL;
Bob Moore15b8dd52009-06-29 13:39:29 +08001067 struct acpica_device_id_list *cid_list = NULL;
1068 char *cid_add = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -04001069 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
1071 switch (type) {
1072 case ACPI_BUS_TYPE_DEVICE:
Bob Moore15b8dd52009-06-29 13:39:29 +08001073 status = acpi_get_object_info(handle, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 if (ACPI_FAILURE(status)) {
Harvey Harrison96b2dd12008-03-05 18:24:51 -08001075 printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 return;
1077 }
1078
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 if (info->valid & ACPI_VALID_HID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001080 hid = info->hardware_id.string;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 if (info->valid & ACPI_VALID_UID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001082 uid = info->unique_id.string;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 if (info->valid & ACPI_VALID_CID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001084 cid_list = &info->compatible_id_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 if (info->valid & ACPI_VALID_ADR) {
1086 device->pnp.bus_address = info->address;
1087 device->flags.bus_address = 1;
1088 }
Zhang Ruiae843332006-12-07 20:57:10 +08001089
Frank Seidel3620f2f2007-12-07 13:20:34 +01001090 /* If we have a video/bay/dock device, add our selfdefined
1091 HID to the CID list. Like that the video/bay/dock drivers
1092 will get autoloaded and the device might still match
1093 against another driver.
1094 */
Thomas Renningerc3d6de62008-08-01 17:37:55 +02001095 if (acpi_is_video_device(device))
Frank Seidel3620f2f2007-12-07 13:20:34 +01001096 cid_add = ACPI_VIDEO_HID;
1097 else if (ACPI_SUCCESS(acpi_bay_match(device)))
1098 cid_add = ACPI_BAY_HID;
1099 else if (ACPI_SUCCESS(acpi_dock_match(device)))
1100 cid_add = ACPI_DOCK_HID;
Zhang Rui54735262007-01-11 02:09:09 -05001101
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 break;
1103 case ACPI_BUS_TYPE_POWER:
1104 hid = ACPI_POWER_HID;
1105 break;
1106 case ACPI_BUS_TYPE_PROCESSOR:
Myron Stowead93a762008-11-04 14:52:55 -07001107 hid = ACPI_PROCESSOR_OBJECT_HID;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 break;
1109 case ACPI_BUS_TYPE_SYSTEM:
1110 hid = ACPI_SYSTEM_HID;
1111 break;
1112 case ACPI_BUS_TYPE_THERMAL:
1113 hid = ACPI_THERMAL_HID;
1114 break;
1115 case ACPI_BUS_TYPE_POWER_BUTTON:
1116 hid = ACPI_BUTTON_HID_POWERF;
1117 break;
1118 case ACPI_BUS_TYPE_SLEEP_BUTTON:
1119 hid = ACPI_BUTTON_HID_SLEEPF;
1120 break;
1121 }
1122
Alex Chiang0c526d92009-05-14 08:31:37 -06001123 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 * \_SB
1125 * ----
1126 * Fix for the system root bus device -- the only root-level device.
1127 */
Bob Moorec51a4de2005-11-17 13:07:00 -05001128 if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 hid = ACPI_BUS_HID;
1130 strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
1131 strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
1132 }
1133
1134 if (hid) {
Bob Moore15b8dd52009-06-29 13:39:29 +08001135 device->pnp.hardware_id = ACPI_ALLOCATE_ZEROED(strlen (hid) + 1);
1136 if (device->pnp.hardware_id) {
1137 strcpy(device->pnp.hardware_id, hid);
1138 device->flags.hardware_id = 1;
Frank Seidel3620f2f2007-12-07 13:20:34 +01001139 }
Bob Moore15b8dd52009-06-29 13:39:29 +08001140 } else
1141 device->pnp.hardware_id = NULL;
1142
1143 if (uid) {
1144 device->pnp.unique_id = ACPI_ALLOCATE_ZEROED(strlen (uid) + 1);
1145 if (device->pnp.unique_id) {
1146 strcpy(device->pnp.unique_id, uid);
1147 device->flags.unique_id = 1;
1148 }
1149 } else
1150 device->pnp.unique_id = NULL;
1151
1152 if (cid_list || cid_add) {
1153 struct acpica_device_id_list *list;
1154
1155 if (cid_add) {
1156 struct acpica_device_id cid;
1157 cid.length = strlen (cid_add) + 1;
1158 cid.string = cid_add;
1159
1160 list = acpi_add_cid(info, &cid);
1161 } else {
1162 list = acpi_add_cid(info, NULL);
1163 }
Frank Seidel3620f2f2007-12-07 13:20:34 +01001164
1165 if (list) {
Frank Seidel3620f2f2007-12-07 13:20:34 +01001166 device->pnp.cid_list = list;
Bob Moore15b8dd52009-06-29 13:39:29 +08001167 if (cid_add)
1168 device->flags.compatible_ids = 1;
1169 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 }
1171
Bob Moore15b8dd52009-06-29 13:39:29 +08001172 kfree(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173}
1174
Len Brown4be44fc2005-08-05 00:44:28 -04001175static int acpi_device_set_context(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176{
1177 acpi_status status = AE_OK;
1178 int result = 0;
1179 /*
1180 * Context
1181 * -------
1182 * Attach this 'struct acpi_device' to the ACPI object. This makes
1183 * resolutions from handle->device very efficient. Note that we need
1184 * to be careful with fixed-feature devices as they all attach to the
1185 * root object.
1186 */
Len Brown4be44fc2005-08-05 00:44:28 -04001187 if (type != ACPI_BUS_TYPE_POWER_BUTTON &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 type != ACPI_BUS_TYPE_SLEEP_BUTTON) {
1189 status = acpi_attach_data(device->handle,
Len Brown4be44fc2005-08-05 00:44:28 -04001190 acpi_bus_data_handler, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191
1192 if (ACPI_FAILURE(status)) {
Len Brown87ecd5c2008-01-01 14:00:00 -05001193 printk(KERN_ERR PREFIX "Error attaching device data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 result = -ENODEV;
1195 }
1196 }
1197 return result;
1198}
1199
Len Brown4be44fc2005-08-05 00:44:28 -04001200static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 if (!dev)
Patrick Mocheld550d982006-06-27 00:41:40 -04001203 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
Li Shaohua96333572006-12-07 20:56:46 +08001205 dev->removal_type = ACPI_BUS_REMOVAL_EJECT;
Patrick Mochel1890a972006-12-07 20:56:31 +08001206 device_release_driver(&dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
1208 if (!rmdevice)
Patrick Mocheld550d982006-06-27 00:41:40 -04001209 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
Rui Zhang2786f6e2006-12-21 02:21:13 -05001211 /*
1212 * unbind _ADR-Based Devices when hot removal
1213 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 if (dev->flags.bus_address) {
1215 if ((dev->parent) && (dev->parent->ops.unbind))
1216 dev->parent->ops.unbind(dev);
1217 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
1219
Patrick Mocheld550d982006-06-27 00:41:40 -04001220 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221}
1222
Rajesh Shah3fb02732005-04-28 00:25:52 -07001223static int
Len Brown4be44fc2005-08-05 00:44:28 -04001224acpi_add_single_object(struct acpi_device **child,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001225 struct acpi_device *parent, acpi_handle handle, int type,
1226 struct acpi_bus_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227{
Len Brown4be44fc2005-08-05 00:44:28 -04001228 int result = 0;
1229 struct acpi_device *device = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231
1232 if (!child)
Patrick Mocheld550d982006-06-27 00:41:40 -04001233 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
Burman Yan36bcbec2006-12-19 12:56:11 -08001235 device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 if (!device) {
Len Brown64684632006-06-26 23:41:38 -04001237 printk(KERN_ERR PREFIX "Memory allocation error\n");
Patrick Mocheld550d982006-06-27 00:41:40 -04001238 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240
1241 device->handle = handle;
1242 device->parent = parent;
Li Shaohuac4168bf2006-12-07 20:56:41 +08001243 device->bus_ops = *ops; /* workround for not call .start */
1244
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245
Len Brown4be44fc2005-08-05 00:44:28 -04001246 acpi_device_get_busid(device, handle, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
1248 /*
1249 * Flags
1250 * -----
1251 * Get prior to calling acpi_bus_get_status() so we know whether
1252 * or not _STA is present. Note that we only look for object
1253 * handles -- cannot evaluate objects until we know the device is
1254 * present and properly initialized.
1255 */
1256 result = acpi_bus_get_flags(device);
1257 if (result)
1258 goto end;
1259
1260 /*
1261 * Status
1262 * ------
Keiichiro Tokunaga6940fab2005-03-30 23:15:47 -05001263 * See if the device is present. We always assume that non-Device
1264 * and non-Processor objects (e.g. thermal zones, power resources,
1265 * etc.) are present, functioning, etc. (at least when parent object
1266 * is present). Note that _STA has a different meaning for some
1267 * objects (e.g. power resources) so we need to be careful how we use
1268 * it.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 */
1270 switch (type) {
Keiichiro Tokunaga6940fab2005-03-30 23:15:47 -05001271 case ACPI_BUS_TYPE_PROCESSOR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 case ACPI_BUS_TYPE_DEVICE:
1273 result = acpi_bus_get_status(device);
Frank Seidel3620f2f2007-12-07 13:20:34 +01001274 if (ACPI_FAILURE(result)) {
1275 result = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 goto end;
1277 }
Zhao Yakui39a0ad82008-08-11 13:40:22 +08001278 /*
1279 * When the device is neither present nor functional, the
1280 * device should not be added to Linux ACPI device tree.
1281 * When the status of the device is not present but functinal,
1282 * it should be added to Linux ACPI tree. For example : bay
1283 * device , dock device.
1284 * In such conditions it is unncessary to check whether it is
1285 * bay device or dock device.
1286 */
1287 if (!device->status.present && !device->status.functional) {
1288 result = -ENODEV;
1289 goto end;
Frank Seidel3620f2f2007-12-07 13:20:34 +01001290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 break;
1292 default:
Bjorn Helgaas0c0e8922007-04-25 14:20:58 -04001293 STRUCT_TO_INT(device->status) =
1294 ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
1295 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 break;
1297 }
1298
1299 /*
1300 * Initialize Device
1301 * -----------------
1302 * TBD: Synch with Core's enumeration/initialization process.
1303 */
1304
1305 /*
1306 * Hardware ID, Unique ID, & Bus Address
1307 * -------------------------------------
1308 */
Len Brown4be44fc2005-08-05 00:44:28 -04001309 acpi_device_set_id(device, parent, handle, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310
1311 /*
Zhao Yakuieab4b642008-08-11 14:54:16 +08001312 * The ACPI device is attached to acpi handle before getting
1313 * the power/wakeup/peformance flags. Otherwise OS can't get
1314 * the corresponding ACPI device by the acpi handle in the course
1315 * of getting the power/wakeup/performance flags.
1316 */
1317 result = acpi_device_set_context(device, type);
1318 if (result)
1319 goto end;
1320
1321 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 * Power Management
1323 * ----------------
1324 */
1325 if (device->flags.power_manageable) {
1326 result = acpi_bus_get_power_flags(device);
1327 if (result)
1328 goto end;
1329 }
1330
Len Brown4be44fc2005-08-05 00:44:28 -04001331 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 * Wakeup device management
1333 *-----------------------
1334 */
1335 if (device->flags.wake_capable) {
1336 result = acpi_bus_get_wakeup_device_flags(device);
1337 if (result)
1338 goto end;
1339 }
1340
1341 /*
1342 * Performance Management
1343 * ----------------------
1344 */
1345 if (device->flags.performance_manageable) {
1346 result = acpi_bus_get_perf_flags(device);
1347 if (result)
1348 goto end;
1349 }
1350
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351
Zhang Ruie49bd2dd2006-12-08 17:23:43 +08001352 result = acpi_device_register(device, parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353
1354 /*
Rui Zhang2786f6e2006-12-21 02:21:13 -05001355 * Bind _ADR-Based Devices when hot add
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 */
1357 if (device->flags.bus_address) {
1358 if (device->parent && device->parent->ops.bind)
1359 device->parent->ops.bind(device);
1360 }
1361
Alex Chiang0c526d92009-05-14 08:31:37 -06001362end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 if (!result)
1364 *child = device;
1365 else {
Jesper Juhl6044ec82005-11-07 01:01:32 -08001366 kfree(device->pnp.cid_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 kfree(device);
1368 }
1369
Patrick Mocheld550d982006-06-27 00:41:40 -04001370 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372
Len Brown4be44fc2005-08-05 00:44:28 -04001373static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374{
Len Brown4be44fc2005-08-05 00:44:28 -04001375 acpi_status status = AE_OK;
1376 struct acpi_device *parent = NULL;
1377 struct acpi_device *child = NULL;
1378 acpi_handle phandle = NULL;
1379 acpi_handle chandle = NULL;
1380 acpi_object_type type = 0;
1381 u32 level = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383
1384 if (!start)
Patrick Mocheld550d982006-06-27 00:41:40 -04001385 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
1387 parent = start;
1388 phandle = start->handle;
Len Brown4be44fc2005-08-05 00:44:28 -04001389
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 /*
1391 * Parse through the ACPI namespace, identify all 'devices', and
1392 * create a new 'struct acpi_device' for each.
1393 */
1394 while ((level > 0) && parent) {
1395
1396 status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
Len Brown4be44fc2005-08-05 00:44:28 -04001397 chandle, &chandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
1399 /*
1400 * If this scope is exhausted then move our way back up.
1401 */
1402 if (ACPI_FAILURE(status)) {
1403 level--;
1404 chandle = phandle;
1405 acpi_get_parent(phandle, &phandle);
1406 if (parent->parent)
1407 parent = parent->parent;
1408 continue;
1409 }
1410
1411 status = acpi_get_type(chandle, &type);
1412 if (ACPI_FAILURE(status))
1413 continue;
1414
1415 /*
1416 * If this is a scope object then parse it (depth-first).
1417 */
1418 if (type == ACPI_TYPE_LOCAL_SCOPE) {
1419 level++;
1420 phandle = chandle;
1421 chandle = NULL;
1422 continue;
1423 }
1424
1425 /*
1426 * We're only interested in objects that we consider 'devices'.
1427 */
1428 switch (type) {
1429 case ACPI_TYPE_DEVICE:
1430 type = ACPI_BUS_TYPE_DEVICE;
1431 break;
1432 case ACPI_TYPE_PROCESSOR:
1433 type = ACPI_BUS_TYPE_PROCESSOR;
1434 break;
1435 case ACPI_TYPE_THERMAL:
1436 type = ACPI_BUS_TYPE_THERMAL;
1437 break;
1438 case ACPI_TYPE_POWER:
1439 type = ACPI_BUS_TYPE_POWER;
1440 break;
1441 default:
1442 continue;
1443 }
1444
Rajesh Shah3fb02732005-04-28 00:25:52 -07001445 if (ops->acpi_op_add)
1446 status = acpi_add_single_object(&child, parent,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001447 chandle, type, ops);
Len Brown4be44fc2005-08-05 00:44:28 -04001448 else
Rajesh Shah3fb02732005-04-28 00:25:52 -07001449 status = acpi_bus_get_device(chandle, &child);
1450
Len Brown4be44fc2005-08-05 00:44:28 -04001451 if (ACPI_FAILURE(status))
1452 continue;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001453
Li Shaohuac4168bf2006-12-07 20:56:41 +08001454 if (ops->acpi_op_start && !(ops->acpi_op_add)) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001455 status = acpi_start_single_object(child);
1456 if (ACPI_FAILURE(status))
1457 continue;
1458 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459
1460 /*
1461 * If the device is present, enabled, and functioning then
1462 * parse its scope (depth-first). Note that we need to
1463 * represent absent devices to facilitate PnP notifications
1464 * -- but only the subtree head (not all of its children,
1465 * which will be enumerated when the parent is inserted).
1466 *
1467 * TBD: Need notifications and other detection mechanisms
Len Brown4be44fc2005-08-05 00:44:28 -04001468 * in place before we can fully implement this.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 */
Zhao Yakui39a0ad82008-08-11 13:40:22 +08001470 /*
1471 * When the device is not present but functional, it is also
1472 * necessary to scan the children of this device.
1473 */
1474 if (child->status.present || (!child->status.present &&
1475 child->status.functional)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
1477 NULL, NULL);
1478 if (ACPI_SUCCESS(status)) {
1479 level++;
1480 phandle = chandle;
1481 chandle = NULL;
1482 parent = child;
1483 }
1484 }
1485 }
1486
Patrick Mocheld550d982006-06-27 00:41:40 -04001487 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
Rajesh Shah3fb02732005-04-28 00:25:52 -07001490int
Len Brown4be44fc2005-08-05 00:44:28 -04001491acpi_bus_add(struct acpi_device **child,
1492 struct acpi_device *parent, acpi_handle handle, int type)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001493{
1494 int result;
1495 struct acpi_bus_ops ops;
1496
Li Shaohuac4168bf2006-12-07 20:56:41 +08001497 memset(&ops, 0, sizeof(ops));
1498 ops.acpi_op_add = 1;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001499
Li Shaohuac4168bf2006-12-07 20:56:41 +08001500 result = acpi_add_single_object(child, parent, handle, type, &ops);
1501 if (!result)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001502 result = acpi_bus_scan(*child, &ops);
Li Shaohuac4168bf2006-12-07 20:56:41 +08001503
Patrick Mocheld550d982006-06-27 00:41:40 -04001504 return result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001505}
1506EXPORT_SYMBOL(acpi_bus_add);
1507
Len Brown4be44fc2005-08-05 00:44:28 -04001508int acpi_bus_start(struct acpi_device *device)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001509{
1510 int result;
1511 struct acpi_bus_ops ops;
1512
Rajesh Shah3fb02732005-04-28 00:25:52 -07001513
1514 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001515 return -EINVAL;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001516
1517 result = acpi_start_single_object(device);
1518 if (!result) {
1519 memset(&ops, 0, sizeof(ops));
1520 ops.acpi_op_start = 1;
1521 result = acpi_bus_scan(device, &ops);
1522 }
Patrick Mocheld550d982006-06-27 00:41:40 -04001523 return result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001524}
1525EXPORT_SYMBOL(acpi_bus_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526
Kristen Accardiceaba662006-02-23 17:56:01 -08001527int acpi_bus_trim(struct acpi_device *start, int rmdevice)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528{
Len Brown4be44fc2005-08-05 00:44:28 -04001529 acpi_status status;
1530 struct acpi_device *parent, *child;
1531 acpi_handle phandle, chandle;
1532 acpi_object_type type;
1533 u32 level = 1;
1534 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Len Brown4be44fc2005-08-05 00:44:28 -04001536 parent = start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537 phandle = start->handle;
1538 child = chandle = NULL;
1539
1540 while ((level > 0) && parent && (!err)) {
1541 status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
Len Brown4be44fc2005-08-05 00:44:28 -04001542 chandle, &chandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543
1544 /*
1545 * If this scope is exhausted then move our way back up.
1546 */
1547 if (ACPI_FAILURE(status)) {
1548 level--;
1549 chandle = phandle;
1550 acpi_get_parent(phandle, &phandle);
1551 child = parent;
1552 parent = parent->parent;
1553
1554 if (level == 0)
1555 err = acpi_bus_remove(child, rmdevice);
1556 else
1557 err = acpi_bus_remove(child, 1);
1558
1559 continue;
1560 }
1561
1562 status = acpi_get_type(chandle, &type);
1563 if (ACPI_FAILURE(status)) {
1564 continue;
1565 }
1566 /*
1567 * If there is a device corresponding to chandle then
1568 * parse it (depth-first).
1569 */
1570 if (acpi_bus_get_device(chandle, &child) == 0) {
1571 level++;
1572 phandle = chandle;
1573 chandle = NULL;
1574 parent = child;
1575 }
1576 continue;
1577 }
1578 return err;
1579}
Kristen Accardiceaba662006-02-23 17:56:01 -08001580EXPORT_SYMBOL_GPL(acpi_bus_trim);
1581
Len Brown4be44fc2005-08-05 00:44:28 -04001582static int acpi_bus_scan_fixed(struct acpi_device *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583{
Len Brown4be44fc2005-08-05 00:44:28 -04001584 int result = 0;
1585 struct acpi_device *device = NULL;
Li Shaohuac4168bf2006-12-07 20:56:41 +08001586 struct acpi_bus_ops ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587
1588 if (!root)
Patrick Mocheld550d982006-06-27 00:41:40 -04001589 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590
Li Shaohuac4168bf2006-12-07 20:56:41 +08001591 memset(&ops, 0, sizeof(ops));
1592 ops.acpi_op_add = 1;
1593 ops.acpi_op_start = 1;
1594
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 /*
1596 * Enumerate all fixed-feature devices.
1597 */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +03001598 if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001599 result = acpi_add_single_object(&device, acpi_root,
Len Brown4be44fc2005-08-05 00:44:28 -04001600 NULL,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001601 ACPI_BUS_TYPE_POWER_BUTTON,
1602 &ops);
Rajesh Shah3fb02732005-04-28 00:25:52 -07001603 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604
Alexey Starikovskiycee324b2007-02-02 19:48:22 +03001605 if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001606 result = acpi_add_single_object(&device, acpi_root,
Len Brown4be44fc2005-08-05 00:44:28 -04001607 NULL,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001608 ACPI_BUS_TYPE_SLEEP_BUTTON,
1609 &ops);
Rajesh Shah3fb02732005-04-28 00:25:52 -07001610 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
Patrick Mocheld550d982006-06-27 00:41:40 -04001612 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613}
1614
Bjorn Helgaase747f272009-03-24 16:49:43 -06001615int __init acpi_scan_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616{
1617 int result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001618 struct acpi_bus_ops ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619
Li Shaohuac4168bf2006-12-07 20:56:41 +08001620 memset(&ops, 0, sizeof(ops));
1621 ops.acpi_op_add = 1;
1622 ops.acpi_op_start = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623
Patrick Mochel5b327262006-05-10 10:33:00 -04001624 result = bus_register(&acpi_bus_type);
1625 if (result) {
1626 /* We don't want to quit even if we failed to add suspend/resume */
1627 printk(KERN_ERR PREFIX "Could not register bus type\n");
1628 }
1629
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 /*
1631 * Create the root device in the bus's device tree
1632 */
Rajesh Shah3fb02732005-04-28 00:25:52 -07001633 result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001634 ACPI_BUS_TYPE_SYSTEM, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635 if (result)
1636 goto Done;
1637
1638 /*
1639 * Enumerate devices in the ACPI namespace.
1640 */
1641 result = acpi_bus_scan_fixed(acpi_root);
Alexey Starikovskiyc04209a2008-01-01 14:12:55 -05001642
Li Shaohuac4168bf2006-12-07 20:56:41 +08001643 if (!result)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001644 result = acpi_bus_scan(acpi_root, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645
1646 if (result)
1647 acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
1648
Alex Chiang0c526d92009-05-14 08:31:37 -06001649Done:
Patrick Mocheld550d982006-06-27 00:41:40 -04001650 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651}