blob: 408ebde18986d95d47ac6dbbe33e23d1fb58e349 [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
Bjorn Helgaas53de5352009-08-31 22:32:20 +0000373 /* Fixed hardware devices have no handles */
374 acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000375 return AE_OK;
376}
377
378static int acpi_device_install_notify_handler(struct acpi_device *device)
379{
380 acpi_status status;
381 char *hid;
382
383 hid = acpi_device_hid(device);
384 if (!strcmp(hid, ACPI_BUTTON_HID_POWERF))
385 status =
386 acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
387 acpi_device_notify_fixed,
388 device);
389 else if (!strcmp(hid, ACPI_BUTTON_HID_SLEEPF))
390 status =
391 acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
392 acpi_device_notify_fixed,
393 device);
394 else
395 status = acpi_install_notify_handler(device->handle,
396 ACPI_DEVICE_NOTIFY,
397 acpi_device_notify,
398 device);
399
400 if (ACPI_FAILURE(status))
401 return -EINVAL;
402 return 0;
403}
404
405static void acpi_device_remove_notify_handler(struct acpi_device *device)
406{
407 if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_POWERF))
408 acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON,
409 acpi_device_notify_fixed);
410 else if (!strcmp(acpi_device_hid(device), ACPI_BUTTON_HID_SLEEPF))
411 acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON,
412 acpi_device_notify_fixed);
413 else
414 acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
415 acpi_device_notify);
416}
417
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800418static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
419static int acpi_start_single_object(struct acpi_device *);
420static int acpi_device_probe(struct device * dev)
Zhang Rui9e89dde2006-12-07 20:56:16 +0800421{
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800422 struct acpi_device *acpi_dev = to_acpi_device(dev);
423 struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
424 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800426 ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
427 if (!ret) {
Li Shaohuac4168bf2006-12-07 20:56:41 +0800428 if (acpi_dev->bus_ops.acpi_op_start)
429 acpi_start_single_object(acpi_dev);
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000430
431 if (acpi_drv->ops.notify) {
432 ret = acpi_device_install_notify_handler(acpi_dev);
433 if (ret) {
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000434 if (acpi_drv->ops.remove)
435 acpi_drv->ops.remove(acpi_dev,
436 acpi_dev->removal_type);
437 return ret;
438 }
439 }
440
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800441 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
442 "Found driver [%s] for device [%s]\n",
443 acpi_drv->name, acpi_dev->pnp.bus_id));
444 get_device(dev);
Zhang Rui9e89dde2006-12-07 20:56:16 +0800445 }
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800446 return ret;
447}
448
449static int acpi_device_remove(struct device * dev)
450{
451 struct acpi_device *acpi_dev = to_acpi_device(dev);
452 struct acpi_driver *acpi_drv = acpi_dev->driver;
453
454 if (acpi_drv) {
Bjorn Helgaas46ec8592009-03-30 17:48:13 +0000455 if (acpi_drv->ops.notify)
456 acpi_device_remove_notify_handler(acpi_dev);
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;
Rafael J. Wysocki9b83ccd2009-09-08 23:15:31 +0200784 device->wakeup.prepare_count = 0;
Zhao Yakui729b2bd2008-03-19 13:26:54 +0800785 /* Call _PSW/_DSW object to disable its ability to wake the sleeping
786 * system for the ACPI device with the _PRW object.
787 * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
788 * So it is necessary to call _DSW object first. Only when it is not
789 * present will the _PSW object used.
790 */
Rafael J. Wysocki77e76602008-07-07 03:33:34 +0200791 psw_error = acpi_device_sleep_wake(device, 0, 0, 0);
792 if (psw_error)
793 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
794 "error in _DSW or _PSW evaluation\n"));
795
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 /* Power button, Lid switch always enable wakeup */
Thomas Renninger29b71a12007-07-23 14:43:51 +0200797 if (!acpi_match_device_ids(device, button_device_ids))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 device->wakeup.flags.run_wake = 1;
799
Alex Chiang0c526d92009-05-14 08:31:37 -0600800end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 if (ACPI_FAILURE(status))
802 device->flags.wake_capable = 0;
803 return 0;
804}
805
Zhang Rui9e89dde2006-12-07 20:56:16 +0800806static int acpi_bus_get_power_flags(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807{
Zhang Rui9e89dde2006-12-07 20:56:16 +0800808 acpi_status status = 0;
809 acpi_handle handle = NULL;
810 u32 i = 0;
811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
813 /*
Zhang Rui9e89dde2006-12-07 20:56:16 +0800814 * Power Management Flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 */
Zhang Rui9e89dde2006-12-07 20:56:16 +0800816 status = acpi_get_handle(device->handle, "_PSC", &handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 if (ACPI_SUCCESS(status))
Zhang Rui9e89dde2006-12-07 20:56:16 +0800818 device->power.flags.explicit_get = 1;
819 status = acpi_get_handle(device->handle, "_IRC", &handle);
820 if (ACPI_SUCCESS(status))
821 device->power.flags.inrush_current = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
823 /*
Zhang Rui9e89dde2006-12-07 20:56:16 +0800824 * Enumerate supported power management states
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 */
Zhang Rui9e89dde2006-12-07 20:56:16 +0800826 for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
827 struct acpi_device_power_state *ps = &device->power.states[i];
828 char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
Zhang Rui9e89dde2006-12-07 20:56:16 +0800830 /* Evaluate "_PRx" to se if power resources are referenced */
831 acpi_evaluate_reference(device->handle, object_name, NULL,
832 &ps->resources);
833 if (ps->resources.count) {
834 device->power.flags.power_resources = 1;
835 ps->flags.valid = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
Zhang Rui9e89dde2006-12-07 20:56:16 +0800838 /* Evaluate "_PSx" to see if we can do explicit sets */
839 object_name[2] = 'S';
840 status = acpi_get_handle(device->handle, object_name, &handle);
841 if (ACPI_SUCCESS(status)) {
842 ps->flags.explicit_set = 1;
843 ps->flags.valid = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 }
Zhang Rui9e89dde2006-12-07 20:56:16 +0800845
846 /* State is valid if we have some power control */
847 if (ps->resources.count || ps->flags.explicit_set)
848 ps->flags.valid = 1;
849
850 ps->power = -1; /* Unknown - driver assigned */
851 ps->latency = -1; /* Unknown - driver assigned */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
Zhang Rui9e89dde2006-12-07 20:56:16 +0800854 /* Set defaults for D0 and D3 states (always valid) */
855 device->power.states[ACPI_STATE_D0].flags.valid = 1;
856 device->power.states[ACPI_STATE_D0].power = 100;
857 device->power.states[ACPI_STATE_D3].flags.valid = 1;
858 device->power.states[ACPI_STATE_D3].power = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Zhang Rui9e89dde2006-12-07 20:56:16 +0800860 /* TBD: System wake support and resource requirements. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861
Zhang Rui9e89dde2006-12-07 20:56:16 +0800862 device->power.state = ACPI_STATE_UNKNOWN;
Zhao Yakuia51e1452008-08-11 14:55:05 +0800863 acpi_bus_get_power(device->handle, &(device->power.state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
865 return 0;
866}
867
Len Brown4be44fc2005-08-05 00:44:28 -0400868static int acpi_bus_get_flags(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869{
Len Brown4be44fc2005-08-05 00:44:28 -0400870 acpi_status status = AE_OK;
871 acpi_handle temp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873
874 /* Presence of _STA indicates 'dynamic_status' */
875 status = acpi_get_handle(device->handle, "_STA", &temp);
876 if (ACPI_SUCCESS(status))
877 device->flags.dynamic_status = 1;
878
879 /* Presence of _CID indicates 'compatible_ids' */
880 status = acpi_get_handle(device->handle, "_CID", &temp);
881 if (ACPI_SUCCESS(status))
882 device->flags.compatible_ids = 1;
883
884 /* Presence of _RMV indicates 'removable' */
885 status = acpi_get_handle(device->handle, "_RMV", &temp);
886 if (ACPI_SUCCESS(status))
887 device->flags.removable = 1;
888
889 /* Presence of _EJD|_EJ0 indicates 'ejectable' */
890 status = acpi_get_handle(device->handle, "_EJD", &temp);
891 if (ACPI_SUCCESS(status))
892 device->flags.ejectable = 1;
893 else {
894 status = acpi_get_handle(device->handle, "_EJ0", &temp);
895 if (ACPI_SUCCESS(status))
896 device->flags.ejectable = 1;
897 }
898
899 /* Presence of _LCK indicates 'lockable' */
900 status = acpi_get_handle(device->handle, "_LCK", &temp);
901 if (ACPI_SUCCESS(status))
902 device->flags.lockable = 1;
903
904 /* Presence of _PS0|_PR0 indicates 'power manageable' */
905 status = acpi_get_handle(device->handle, "_PS0", &temp);
906 if (ACPI_FAILURE(status))
907 status = acpi_get_handle(device->handle, "_PR0", &temp);
908 if (ACPI_SUCCESS(status))
909 device->flags.power_manageable = 1;
910
911 /* Presence of _PRW indicates wake capable */
912 status = acpi_get_handle(device->handle, "_PRW", &temp);
913 if (ACPI_SUCCESS(status))
914 device->flags.wake_capable = 1;
915
Joe Perches3c5f9be42008-02-03 17:06:17 +0200916 /* TBD: Performance management */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917
Patrick Mocheld550d982006-06-27 00:41:40 -0400918 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919}
920
Len Brown4be44fc2005-08-05 00:44:28 -0400921static void acpi_device_get_busid(struct acpi_device *device,
922 acpi_handle handle, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923{
Len Brown4be44fc2005-08-05 00:44:28 -0400924 char bus_id[5] = { '?', 0 };
925 struct acpi_buffer buffer = { sizeof(bus_id), bus_id };
926 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
928 /*
929 * Bus ID
930 * ------
931 * The device's Bus ID is simply the object name.
932 * TBD: Shouldn't this value be unique (within the ACPI namespace)?
933 */
934 switch (type) {
935 case ACPI_BUS_TYPE_SYSTEM:
936 strcpy(device->pnp.bus_id, "ACPI");
937 break;
938 case ACPI_BUS_TYPE_POWER_BUTTON:
939 strcpy(device->pnp.bus_id, "PWRF");
940 break;
941 case ACPI_BUS_TYPE_SLEEP_BUTTON:
942 strcpy(device->pnp.bus_id, "SLPF");
943 break;
944 default:
945 acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
946 /* Clean up trailing underscores (if any) */
947 for (i = 3; i > 1; i--) {
948 if (bus_id[i] == '_')
949 bus_id[i] = '\0';
950 else
951 break;
952 }
953 strcpy(device->pnp.bus_id, bus_id);
954 break;
955 }
956}
957
Zhang Rui54735262007-01-11 02:09:09 -0500958/*
959 * acpi_bay_match - see if a device is an ejectable driver bay
960 *
961 * If an acpi object is ejectable and has one of the ACPI ATA methods defined,
962 * then we can safely call it an ejectable drive bay
963 */
964static int acpi_bay_match(struct acpi_device *device){
965 acpi_status status;
966 acpi_handle handle;
967 acpi_handle tmp;
968 acpi_handle phandle;
969
970 handle = device->handle;
971
972 status = acpi_get_handle(handle, "_EJ0", &tmp);
973 if (ACPI_FAILURE(status))
974 return -ENODEV;
975
976 if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
977 (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
978 (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
979 (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
980 return 0;
981
982 if (acpi_get_parent(handle, &phandle))
983 return -ENODEV;
984
985 if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
986 (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
987 (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
988 (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
989 return 0;
990
991 return -ENODEV;
992}
993
Frank Seidel3620f2f2007-12-07 13:20:34 +0100994/*
995 * acpi_dock_match - see if a device has a _DCK method
996 */
997static int acpi_dock_match(struct acpi_device *device)
998{
999 acpi_handle tmp;
1000 return acpi_get_handle(device->handle, "_DCK", &tmp);
1001}
1002
Bob Moore15b8dd52009-06-29 13:39:29 +08001003static struct acpica_device_id_list*
1004acpi_add_cid(
1005 struct acpi_device_info *info,
1006 struct acpica_device_id *new_cid)
1007{
1008 struct acpica_device_id_list *cid;
1009 char *next_id_string;
1010 acpi_size cid_length;
1011 acpi_size new_cid_length;
1012 u32 i;
1013
1014
1015 /* Allocate new CID list with room for the new CID */
1016
1017 if (!new_cid)
1018 new_cid_length = info->compatible_id_list.list_size;
1019 else if (info->compatible_id_list.list_size)
1020 new_cid_length = info->compatible_id_list.list_size +
1021 new_cid->length + sizeof(struct acpica_device_id);
1022 else
1023 new_cid_length = sizeof(struct acpica_device_id_list) + new_cid->length;
1024
1025 cid = ACPI_ALLOCATE_ZEROED(new_cid_length);
1026 if (!cid) {
1027 return NULL;
1028 }
1029
1030 cid->list_size = new_cid_length;
1031 cid->count = info->compatible_id_list.count;
1032 if (new_cid)
1033 cid->count++;
1034 next_id_string = (char *) cid->ids + (cid->count * sizeof(struct acpica_device_id));
1035
1036 /* Copy all existing CIDs */
1037
1038 for (i = 0; i < info->compatible_id_list.count; i++) {
1039 cid_length = info->compatible_id_list.ids[i].length;
1040 cid->ids[i].string = next_id_string;
1041 cid->ids[i].length = cid_length;
1042
1043 ACPI_MEMCPY(next_id_string, info->compatible_id_list.ids[i].string,
1044 cid_length);
1045
1046 next_id_string += cid_length;
1047 }
1048
1049 /* Append the new CID */
1050
1051 if (new_cid) {
1052 cid->ids[i].string = next_id_string;
1053 cid->ids[i].length = new_cid->length;
1054
1055 ACPI_MEMCPY(next_id_string, new_cid->string, new_cid->length);
1056 }
1057
1058 return cid;
1059}
1060
Len Brown4be44fc2005-08-05 00:44:28 -04001061static void acpi_device_set_id(struct acpi_device *device,
1062 struct acpi_device *parent, acpi_handle handle,
1063 int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064{
Bob Moore15b8dd52009-06-29 13:39:29 +08001065 struct acpi_device_info *info = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -04001066 char *hid = NULL;
1067 char *uid = NULL;
Bob Moore15b8dd52009-06-29 13:39:29 +08001068 struct acpica_device_id_list *cid_list = NULL;
1069 char *cid_add = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -04001070 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071
1072 switch (type) {
1073 case ACPI_BUS_TYPE_DEVICE:
Bob Moore15b8dd52009-06-29 13:39:29 +08001074 status = acpi_get_object_info(handle, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 if (ACPI_FAILURE(status)) {
Harvey Harrison96b2dd12008-03-05 18:24:51 -08001076 printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 return;
1078 }
1079
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 if (info->valid & ACPI_VALID_HID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001081 hid = info->hardware_id.string;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 if (info->valid & ACPI_VALID_UID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001083 uid = info->unique_id.string;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 if (info->valid & ACPI_VALID_CID)
Bob Moore15b8dd52009-06-29 13:39:29 +08001085 cid_list = &info->compatible_id_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 if (info->valid & ACPI_VALID_ADR) {
1087 device->pnp.bus_address = info->address;
1088 device->flags.bus_address = 1;
1089 }
Zhang Ruiae843332006-12-07 20:57:10 +08001090
Frank Seidel3620f2f2007-12-07 13:20:34 +01001091 /* If we have a video/bay/dock device, add our selfdefined
1092 HID to the CID list. Like that the video/bay/dock drivers
1093 will get autoloaded and the device might still match
1094 against another driver.
1095 */
Thomas Renningerc3d6de62008-08-01 17:37:55 +02001096 if (acpi_is_video_device(device))
Frank Seidel3620f2f2007-12-07 13:20:34 +01001097 cid_add = ACPI_VIDEO_HID;
1098 else if (ACPI_SUCCESS(acpi_bay_match(device)))
1099 cid_add = ACPI_BAY_HID;
1100 else if (ACPI_SUCCESS(acpi_dock_match(device)))
1101 cid_add = ACPI_DOCK_HID;
Zhang Rui54735262007-01-11 02:09:09 -05001102
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 break;
1104 case ACPI_BUS_TYPE_POWER:
1105 hid = ACPI_POWER_HID;
1106 break;
1107 case ACPI_BUS_TYPE_PROCESSOR:
Myron Stowead93a762008-11-04 14:52:55 -07001108 hid = ACPI_PROCESSOR_OBJECT_HID;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 break;
1110 case ACPI_BUS_TYPE_SYSTEM:
1111 hid = ACPI_SYSTEM_HID;
1112 break;
1113 case ACPI_BUS_TYPE_THERMAL:
1114 hid = ACPI_THERMAL_HID;
1115 break;
1116 case ACPI_BUS_TYPE_POWER_BUTTON:
1117 hid = ACPI_BUTTON_HID_POWERF;
1118 break;
1119 case ACPI_BUS_TYPE_SLEEP_BUTTON:
1120 hid = ACPI_BUTTON_HID_SLEEPF;
1121 break;
1122 }
1123
Alex Chiang0c526d92009-05-14 08:31:37 -06001124 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 * \_SB
1126 * ----
1127 * Fix for the system root bus device -- the only root-level device.
1128 */
Bob Moorec51a4de2005-11-17 13:07:00 -05001129 if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 hid = ACPI_BUS_HID;
1131 strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
1132 strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
1133 }
1134
1135 if (hid) {
Bob Moore15b8dd52009-06-29 13:39:29 +08001136 device->pnp.hardware_id = ACPI_ALLOCATE_ZEROED(strlen (hid) + 1);
1137 if (device->pnp.hardware_id) {
1138 strcpy(device->pnp.hardware_id, hid);
1139 device->flags.hardware_id = 1;
Frank Seidel3620f2f2007-12-07 13:20:34 +01001140 }
Hugh Dickins718fb0d2009-08-06 23:18:12 +00001141 }
1142 if (!device->flags.hardware_id)
1143 device->pnp.hardware_id = "";
Bob Moore15b8dd52009-06-29 13:39:29 +08001144
1145 if (uid) {
1146 device->pnp.unique_id = ACPI_ALLOCATE_ZEROED(strlen (uid) + 1);
1147 if (device->pnp.unique_id) {
1148 strcpy(device->pnp.unique_id, uid);
1149 device->flags.unique_id = 1;
1150 }
Hugh Dickins718fb0d2009-08-06 23:18:12 +00001151 }
1152 if (!device->flags.unique_id)
1153 device->pnp.unique_id = "";
Bob Moore15b8dd52009-06-29 13:39:29 +08001154
1155 if (cid_list || cid_add) {
1156 struct acpica_device_id_list *list;
1157
1158 if (cid_add) {
1159 struct acpica_device_id cid;
1160 cid.length = strlen (cid_add) + 1;
1161 cid.string = cid_add;
1162
1163 list = acpi_add_cid(info, &cid);
1164 } else {
1165 list = acpi_add_cid(info, NULL);
1166 }
Frank Seidel3620f2f2007-12-07 13:20:34 +01001167
1168 if (list) {
Frank Seidel3620f2f2007-12-07 13:20:34 +01001169 device->pnp.cid_list = list;
Bob Moore15b8dd52009-06-29 13:39:29 +08001170 if (cid_add)
1171 device->flags.compatible_ids = 1;
1172 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 }
1174
Bob Moore15b8dd52009-06-29 13:39:29 +08001175 kfree(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176}
1177
Len Brown4be44fc2005-08-05 00:44:28 -04001178static int acpi_device_set_context(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179{
1180 acpi_status status = AE_OK;
1181 int result = 0;
1182 /*
1183 * Context
1184 * -------
1185 * Attach this 'struct acpi_device' to the ACPI object. This makes
1186 * resolutions from handle->device very efficient. Note that we need
1187 * to be careful with fixed-feature devices as they all attach to the
1188 * root object.
1189 */
Len Brown4be44fc2005-08-05 00:44:28 -04001190 if (type != ACPI_BUS_TYPE_POWER_BUTTON &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 type != ACPI_BUS_TYPE_SLEEP_BUTTON) {
1192 status = acpi_attach_data(device->handle,
Len Brown4be44fc2005-08-05 00:44:28 -04001193 acpi_bus_data_handler, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
1195 if (ACPI_FAILURE(status)) {
Len Brown87ecd5c2008-01-01 14:00:00 -05001196 printk(KERN_ERR PREFIX "Error attaching device data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 result = -ENODEV;
1198 }
1199 }
1200 return result;
1201}
1202
Len Brown4be44fc2005-08-05 00:44:28 -04001203static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 if (!dev)
Patrick Mocheld550d982006-06-27 00:41:40 -04001206 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
Li Shaohua96333572006-12-07 20:56:46 +08001208 dev->removal_type = ACPI_BUS_REMOVAL_EJECT;
Patrick Mochel1890a972006-12-07 20:56:31 +08001209 device_release_driver(&dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
1211 if (!rmdevice)
Patrick Mocheld550d982006-06-27 00:41:40 -04001212 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
Rui Zhang2786f6e2006-12-21 02:21:13 -05001214 /*
1215 * unbind _ADR-Based Devices when hot removal
1216 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 if (dev->flags.bus_address) {
1218 if ((dev->parent) && (dev->parent->ops.unbind))
1219 dev->parent->ops.unbind(dev);
1220 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
1222
Patrick Mocheld550d982006-06-27 00:41:40 -04001223 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224}
1225
Rajesh Shah3fb02732005-04-28 00:25:52 -07001226static int
Len Brown4be44fc2005-08-05 00:44:28 -04001227acpi_add_single_object(struct acpi_device **child,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001228 struct acpi_device *parent, acpi_handle handle, int type,
1229 struct acpi_bus_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230{
Len Brown4be44fc2005-08-05 00:44:28 -04001231 int result = 0;
1232 struct acpi_device *device = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
1235 if (!child)
Patrick Mocheld550d982006-06-27 00:41:40 -04001236 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237
Burman Yan36bcbec2006-12-19 12:56:11 -08001238 device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 if (!device) {
Len Brown64684632006-06-26 23:41:38 -04001240 printk(KERN_ERR PREFIX "Memory allocation error\n");
Patrick Mocheld550d982006-06-27 00:41:40 -04001241 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
1244 device->handle = handle;
1245 device->parent = parent;
Li Shaohuac4168bf2006-12-07 20:56:41 +08001246 device->bus_ops = *ops; /* workround for not call .start */
1247
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
Len Brown4be44fc2005-08-05 00:44:28 -04001249 acpi_device_get_busid(device, handle, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
1251 /*
1252 * Flags
1253 * -----
1254 * Get prior to calling acpi_bus_get_status() so we know whether
1255 * or not _STA is present. Note that we only look for object
1256 * handles -- cannot evaluate objects until we know the device is
1257 * present and properly initialized.
1258 */
1259 result = acpi_bus_get_flags(device);
1260 if (result)
1261 goto end;
1262
1263 /*
1264 * Status
1265 * ------
Keiichiro Tokunaga6940fab2005-03-30 23:15:47 -05001266 * See if the device is present. We always assume that non-Device
1267 * and non-Processor objects (e.g. thermal zones, power resources,
1268 * etc.) are present, functioning, etc. (at least when parent object
1269 * is present). Note that _STA has a different meaning for some
1270 * objects (e.g. power resources) so we need to be careful how we use
1271 * it.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 */
1273 switch (type) {
Keiichiro Tokunaga6940fab2005-03-30 23:15:47 -05001274 case ACPI_BUS_TYPE_PROCESSOR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 case ACPI_BUS_TYPE_DEVICE:
1276 result = acpi_bus_get_status(device);
Frank Seidel3620f2f2007-12-07 13:20:34 +01001277 if (ACPI_FAILURE(result)) {
1278 result = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 goto end;
1280 }
Zhao Yakui39a0ad82008-08-11 13:40:22 +08001281 /*
1282 * When the device is neither present nor functional, the
1283 * device should not be added to Linux ACPI device tree.
1284 * When the status of the device is not present but functinal,
1285 * it should be added to Linux ACPI tree. For example : bay
1286 * device , dock device.
1287 * In such conditions it is unncessary to check whether it is
1288 * bay device or dock device.
1289 */
1290 if (!device->status.present && !device->status.functional) {
1291 result = -ENODEV;
1292 goto end;
Frank Seidel3620f2f2007-12-07 13:20:34 +01001293 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 break;
1295 default:
Bjorn Helgaas0c0e8922007-04-25 14:20:58 -04001296 STRUCT_TO_INT(device->status) =
1297 ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
1298 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 break;
1300 }
1301
1302 /*
1303 * Initialize Device
1304 * -----------------
1305 * TBD: Synch with Core's enumeration/initialization process.
1306 */
1307
1308 /*
1309 * Hardware ID, Unique ID, & Bus Address
1310 * -------------------------------------
1311 */
Len Brown4be44fc2005-08-05 00:44:28 -04001312 acpi_device_set_id(device, parent, handle, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
1314 /*
1315 * Power Management
1316 * ----------------
1317 */
1318 if (device->flags.power_manageable) {
1319 result = acpi_bus_get_power_flags(device);
1320 if (result)
1321 goto end;
1322 }
1323
Len Brown4be44fc2005-08-05 00:44:28 -04001324 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 * Wakeup device management
1326 *-----------------------
1327 */
1328 if (device->flags.wake_capable) {
1329 result = acpi_bus_get_wakeup_device_flags(device);
1330 if (result)
1331 goto end;
1332 }
1333
1334 /*
1335 * Performance Management
1336 * ----------------------
1337 */
1338 if (device->flags.performance_manageable) {
1339 result = acpi_bus_get_perf_flags(device);
1340 if (result)
1341 goto end;
1342 }
1343
Len Brownf61f9252009-09-05 13:33:23 -04001344 if ((result = acpi_device_set_context(device, type)))
1345 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346
Zhang Ruie49bd2dd2006-12-08 17:23:43 +08001347 result = acpi_device_register(device, parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
1349 /*
Rui Zhang2786f6e2006-12-21 02:21:13 -05001350 * Bind _ADR-Based Devices when hot add
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 */
1352 if (device->flags.bus_address) {
1353 if (device->parent && device->parent->ops.bind)
1354 device->parent->ops.bind(device);
1355 }
1356
Alex Chiang0c526d92009-05-14 08:31:37 -06001357end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 if (!result)
1359 *child = device;
Hugh Dickins718fb0d2009-08-06 23:18:12 +00001360 else
1361 acpi_device_release(&device->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362
Patrick Mocheld550d982006-06-27 00:41:40 -04001363 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365
Len Brown4be44fc2005-08-05 00:44:28 -04001366static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367{
Len Brown4be44fc2005-08-05 00:44:28 -04001368 acpi_status status = AE_OK;
1369 struct acpi_device *parent = NULL;
1370 struct acpi_device *child = NULL;
1371 acpi_handle phandle = NULL;
1372 acpi_handle chandle = NULL;
1373 acpi_object_type type = 0;
1374 u32 level = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376
1377 if (!start)
Patrick Mocheld550d982006-06-27 00:41:40 -04001378 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379
1380 parent = start;
1381 phandle = start->handle;
Len Brown4be44fc2005-08-05 00:44:28 -04001382
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 /*
1384 * Parse through the ACPI namespace, identify all 'devices', and
1385 * create a new 'struct acpi_device' for each.
1386 */
1387 while ((level > 0) && parent) {
1388
1389 status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
Len Brown4be44fc2005-08-05 00:44:28 -04001390 chandle, &chandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391
1392 /*
1393 * If this scope is exhausted then move our way back up.
1394 */
1395 if (ACPI_FAILURE(status)) {
1396 level--;
1397 chandle = phandle;
1398 acpi_get_parent(phandle, &phandle);
1399 if (parent->parent)
1400 parent = parent->parent;
1401 continue;
1402 }
1403
1404 status = acpi_get_type(chandle, &type);
1405 if (ACPI_FAILURE(status))
1406 continue;
1407
1408 /*
1409 * If this is a scope object then parse it (depth-first).
1410 */
1411 if (type == ACPI_TYPE_LOCAL_SCOPE) {
1412 level++;
1413 phandle = chandle;
1414 chandle = NULL;
1415 continue;
1416 }
1417
1418 /*
1419 * We're only interested in objects that we consider 'devices'.
1420 */
1421 switch (type) {
1422 case ACPI_TYPE_DEVICE:
1423 type = ACPI_BUS_TYPE_DEVICE;
1424 break;
1425 case ACPI_TYPE_PROCESSOR:
1426 type = ACPI_BUS_TYPE_PROCESSOR;
1427 break;
1428 case ACPI_TYPE_THERMAL:
1429 type = ACPI_BUS_TYPE_THERMAL;
1430 break;
1431 case ACPI_TYPE_POWER:
1432 type = ACPI_BUS_TYPE_POWER;
1433 break;
1434 default:
1435 continue;
1436 }
1437
Rajesh Shah3fb02732005-04-28 00:25:52 -07001438 if (ops->acpi_op_add)
1439 status = acpi_add_single_object(&child, parent,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001440 chandle, type, ops);
Len Brown4be44fc2005-08-05 00:44:28 -04001441 else
Rajesh Shah3fb02732005-04-28 00:25:52 -07001442 status = acpi_bus_get_device(chandle, &child);
1443
Len Brown4be44fc2005-08-05 00:44:28 -04001444 if (ACPI_FAILURE(status))
1445 continue;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001446
Li Shaohuac4168bf2006-12-07 20:56:41 +08001447 if (ops->acpi_op_start && !(ops->acpi_op_add)) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001448 status = acpi_start_single_object(child);
1449 if (ACPI_FAILURE(status))
1450 continue;
1451 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452
1453 /*
1454 * If the device is present, enabled, and functioning then
1455 * parse its scope (depth-first). Note that we need to
1456 * represent absent devices to facilitate PnP notifications
1457 * -- but only the subtree head (not all of its children,
1458 * which will be enumerated when the parent is inserted).
1459 *
1460 * TBD: Need notifications and other detection mechanisms
Len Brown4be44fc2005-08-05 00:44:28 -04001461 * in place before we can fully implement this.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 */
Zhao Yakui39a0ad82008-08-11 13:40:22 +08001463 /*
1464 * When the device is not present but functional, it is also
1465 * necessary to scan the children of this device.
1466 */
1467 if (child->status.present || (!child->status.present &&
1468 child->status.functional)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
1470 NULL, NULL);
1471 if (ACPI_SUCCESS(status)) {
1472 level++;
1473 phandle = chandle;
1474 chandle = NULL;
1475 parent = child;
1476 }
1477 }
1478 }
1479
Patrick Mocheld550d982006-06-27 00:41:40 -04001480 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482
Rajesh Shah3fb02732005-04-28 00:25:52 -07001483int
Len Brown4be44fc2005-08-05 00:44:28 -04001484acpi_bus_add(struct acpi_device **child,
1485 struct acpi_device *parent, acpi_handle handle, int type)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001486{
1487 int result;
1488 struct acpi_bus_ops ops;
1489
Li Shaohuac4168bf2006-12-07 20:56:41 +08001490 memset(&ops, 0, sizeof(ops));
1491 ops.acpi_op_add = 1;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001492
Li Shaohuac4168bf2006-12-07 20:56:41 +08001493 result = acpi_add_single_object(child, parent, handle, type, &ops);
1494 if (!result)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001495 result = acpi_bus_scan(*child, &ops);
Li Shaohuac4168bf2006-12-07 20:56:41 +08001496
Patrick Mocheld550d982006-06-27 00:41:40 -04001497 return result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001498}
1499EXPORT_SYMBOL(acpi_bus_add);
1500
Len Brown4be44fc2005-08-05 00:44:28 -04001501int acpi_bus_start(struct acpi_device *device)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001502{
1503 int result;
1504 struct acpi_bus_ops ops;
1505
Rajesh Shah3fb02732005-04-28 00:25:52 -07001506
1507 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001508 return -EINVAL;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001509
1510 result = acpi_start_single_object(device);
1511 if (!result) {
1512 memset(&ops, 0, sizeof(ops));
1513 ops.acpi_op_start = 1;
1514 result = acpi_bus_scan(device, &ops);
1515 }
Patrick Mocheld550d982006-06-27 00:41:40 -04001516 return result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001517}
1518EXPORT_SYMBOL(acpi_bus_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519
Kristen Accardiceaba662006-02-23 17:56:01 -08001520int acpi_bus_trim(struct acpi_device *start, int rmdevice)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521{
Len Brown4be44fc2005-08-05 00:44:28 -04001522 acpi_status status;
1523 struct acpi_device *parent, *child;
1524 acpi_handle phandle, chandle;
1525 acpi_object_type type;
1526 u32 level = 1;
1527 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528
Len Brown4be44fc2005-08-05 00:44:28 -04001529 parent = start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 phandle = start->handle;
1531 child = chandle = NULL;
1532
1533 while ((level > 0) && parent && (!err)) {
1534 status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
Len Brown4be44fc2005-08-05 00:44:28 -04001535 chandle, &chandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536
1537 /*
1538 * If this scope is exhausted then move our way back up.
1539 */
1540 if (ACPI_FAILURE(status)) {
1541 level--;
1542 chandle = phandle;
1543 acpi_get_parent(phandle, &phandle);
1544 child = parent;
1545 parent = parent->parent;
1546
1547 if (level == 0)
1548 err = acpi_bus_remove(child, rmdevice);
1549 else
1550 err = acpi_bus_remove(child, 1);
1551
1552 continue;
1553 }
1554
1555 status = acpi_get_type(chandle, &type);
1556 if (ACPI_FAILURE(status)) {
1557 continue;
1558 }
1559 /*
1560 * If there is a device corresponding to chandle then
1561 * parse it (depth-first).
1562 */
1563 if (acpi_bus_get_device(chandle, &child) == 0) {
1564 level++;
1565 phandle = chandle;
1566 chandle = NULL;
1567 parent = child;
1568 }
1569 continue;
1570 }
1571 return err;
1572}
Kristen Accardiceaba662006-02-23 17:56:01 -08001573EXPORT_SYMBOL_GPL(acpi_bus_trim);
1574
Len Brown4be44fc2005-08-05 00:44:28 -04001575static int acpi_bus_scan_fixed(struct acpi_device *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576{
Len Brown4be44fc2005-08-05 00:44:28 -04001577 int result = 0;
1578 struct acpi_device *device = NULL;
Li Shaohuac4168bf2006-12-07 20:56:41 +08001579 struct acpi_bus_ops ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580
1581 if (!root)
Patrick Mocheld550d982006-06-27 00:41:40 -04001582 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583
Li Shaohuac4168bf2006-12-07 20:56:41 +08001584 memset(&ops, 0, sizeof(ops));
1585 ops.acpi_op_add = 1;
1586 ops.acpi_op_start = 1;
1587
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 /*
1589 * Enumerate all fixed-feature devices.
1590 */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +03001591 if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001592 result = acpi_add_single_object(&device, acpi_root,
Len Brown4be44fc2005-08-05 00:44:28 -04001593 NULL,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001594 ACPI_BUS_TYPE_POWER_BUTTON,
1595 &ops);
Rajesh Shah3fb02732005-04-28 00:25:52 -07001596 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
Alexey Starikovskiycee324b2007-02-02 19:48:22 +03001598 if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_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_SLEEP_BUTTON,
1602 &ops);
Rajesh Shah3fb02732005-04-28 00:25:52 -07001603 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604
Patrick Mocheld550d982006-06-27 00:41:40 -04001605 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606}
1607
Bjorn Helgaase747f272009-03-24 16:49:43 -06001608int __init acpi_scan_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609{
1610 int result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001611 struct acpi_bus_ops ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612
Li Shaohuac4168bf2006-12-07 20:56:41 +08001613 memset(&ops, 0, sizeof(ops));
1614 ops.acpi_op_add = 1;
1615 ops.acpi_op_start = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
Patrick Mochel5b327262006-05-10 10:33:00 -04001617 result = bus_register(&acpi_bus_type);
1618 if (result) {
1619 /* We don't want to quit even if we failed to add suspend/resume */
1620 printk(KERN_ERR PREFIX "Could not register bus type\n");
1621 }
1622
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 /*
1624 * Create the root device in the bus's device tree
1625 */
Rajesh Shah3fb02732005-04-28 00:25:52 -07001626 result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001627 ACPI_BUS_TYPE_SYSTEM, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 if (result)
1629 goto Done;
1630
1631 /*
1632 * Enumerate devices in the ACPI namespace.
1633 */
1634 result = acpi_bus_scan_fixed(acpi_root);
Alexey Starikovskiyc04209a2008-01-01 14:12:55 -05001635
Li Shaohuac4168bf2006-12-07 20:56:41 +08001636 if (!result)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001637 result = acpi_bus_scan(acpi_root, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638
1639 if (result)
1640 acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
1641
Alex Chiang0c526d92009-05-14 08:31:37 -06001642Done:
Patrick Mocheld550d982006-06-27 00:41:40 -04001643 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644}