blob: bb0e0da39fb15d355be664e5ae23f1dc5e632441 [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>
9
10#include <acpi/acpi_drivers.h>
11#include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */
12
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#define _COMPONENT ACPI_BUS_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050014ACPI_MODULE_NAME("scan");
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#define STRUCT_TO_INT(s) (*((int*)&s))
Len Brown4be44fc2005-08-05 00:44:28 -040016extern struct acpi_device *acpi_root;
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18#define ACPI_BUS_CLASS "system_bus"
19#define ACPI_BUS_HID "ACPI_BUS"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#define ACPI_BUS_DEVICE_NAME "System Bus"
21
22static LIST_HEAD(acpi_device_list);
Zhang Ruie49bd2d2006-12-08 17:23:43 +080023static LIST_HEAD(acpi_bus_id_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070024DEFINE_SPINLOCK(acpi_device_lock);
25LIST_HEAD(acpi_wakeup_device_list);
26
Zhang Ruie49bd2d2006-12-08 17:23:43 +080027struct acpi_device_bus_id{
Zhang Ruibb095852007-01-04 15:03:18 +080028 char bus_id[15];
Zhang Ruie49bd2d2006-12-08 17:23:43 +080029 unsigned int instance_no;
30 struct list_head node;
31};
Len Brown4be44fc2005-08-05 00:44:28 -040032static int acpi_eject_operation(acpi_handle handle, int lockable)
Linus Torvalds1da177e2005-04-16 15:20:36 -070033{
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 struct acpi_object_list arg_list;
35 union acpi_object arg;
36 acpi_status status = AE_OK;
37
38 /*
39 * TBD: evaluate _PS3?
40 */
41
42 if (lockable) {
43 arg_list.count = 1;
44 arg_list.pointer = &arg;
45 arg.type = ACPI_TYPE_INTEGER;
46 arg.integer.value = 0;
47 acpi_evaluate_object(handle, "_LCK", &arg_list, NULL);
48 }
49
50 arg_list.count = 1;
51 arg_list.pointer = &arg;
52 arg.type = ACPI_TYPE_INTEGER;
53 arg.integer.value = 1;
54
55 /*
56 * TBD: _EJD support.
57 */
58
59 status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
60 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -040061 return (-ENODEV);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 }
63
Len Brown4be44fc2005-08-05 00:44:28 -040064 return (0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065}
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067static ssize_t
Patrick Mochelf883d9d2006-12-07 20:56:38 +080068acpi_eject_store(struct device *d, struct device_attribute *attr,
69 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
Len Brown4be44fc2005-08-05 00:44:28 -040071 int result;
72 int ret = count;
73 int islockable;
74 acpi_status status;
75 acpi_handle handle;
76 acpi_object_type type = 0;
Patrick Mochelf883d9d2006-12-07 20:56:38 +080077 struct acpi_device *acpi_device = to_acpi_device(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79 if ((!count) || (buf[0] != '1')) {
80 return -EINVAL;
81 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#ifndef FORCE_EJECT
Patrick Mochelf883d9d2006-12-07 20:56:38 +080083 if (acpi_device->driver == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 ret = -ENODEV;
85 goto err;
86 }
87#endif
Patrick Mochelf883d9d2006-12-07 20:56:38 +080088 status = acpi_get_type(acpi_device->handle, &type);
89 if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 ret = -ENODEV;
91 goto err;
92 }
93
Patrick Mochelf883d9d2006-12-07 20:56:38 +080094 islockable = acpi_device->flags.lockable;
95 handle = acpi_device->handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Patrick Mochelf883d9d2006-12-07 20:56:38 +080097 result = acpi_bus_trim(acpi_device, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99 if (!result)
100 result = acpi_eject_operation(handle, islockable);
101
102 if (result) {
103 ret = -EBUSY;
104 }
Len Brown4be44fc2005-08-05 00:44:28 -0400105 err:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107}
108
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800109static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800111static ssize_t
112acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) {
113 struct acpi_device *acpi_dev = to_acpi_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800115 return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id);
116}
117static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
118
119static ssize_t
120acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) {
121 struct acpi_device *acpi_dev = to_acpi_device(dev);
122 struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
123 int result;
124
125 result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path);
126 if(result)
127 goto end;
128
129 result = sprintf(buf, "%s\n", (char*)path.pointer);
130 kfree(path.pointer);
131 end:
132 return result;
133}
134static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL);
135
136static int acpi_device_setup_files(struct acpi_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137{
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800138 acpi_status status;
139 acpi_handle temp;
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800140 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800142 /*
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800143 * Devices gotten from FADT don't have a "path" attribute
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800144 */
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800145 if(dev->handle) {
146 result = device_create_file(&dev->dev, &dev_attr_path);
147 if(result)
148 goto end;
149 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800151 if(dev->flags.hardware_id) {
152 result = device_create_file(&dev->dev, &dev_attr_hid);
153 if(result)
154 goto end;
155 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800157 /*
158 * If device has _EJ0, 'eject' file is created that is used to trigger
159 * hot-removal function from userland.
160 */
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800161 status = acpi_get_handle(dev->handle, "_EJ0", &temp);
162 if (ACPI_SUCCESS(status))
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800163 result = device_create_file(&dev->dev, &dev_attr_eject);
164 end:
165 return result;
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800166}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800168static void acpi_device_remove_files(struct acpi_device *dev)
169{
170 acpi_status status;
171 acpi_handle temp;
172
173 /*
174 * If device has _EJ0, 'eject' file is created that is used to trigger
175 * hot-removal function from userland.
176 */
177 status = acpi_get_handle(dev->handle, "_EJ0", &temp);
178 if (ACPI_SUCCESS(status))
179 device_remove_file(&dev->dev, &dev_attr_eject);
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800180
181 if(dev->flags.hardware_id)
182 device_remove_file(&dev->dev, &dev_attr_hid);
183 if(dev->handle)
184 device_remove_file(&dev->dev, &dev_attr_path);
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800185}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186/* --------------------------------------------------------------------------
Zhang Rui9e89dde2006-12-07 20:56:16 +0800187 ACPI Bus operations
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 -------------------------------------------------------------------------- */
Patrick Mochel1890a972006-12-07 20:56:31 +0800189static void acpi_device_release(struct device *dev)
190{
191 struct acpi_device *acpi_dev = to_acpi_device(dev);
192
193 kfree(acpi_dev->pnp.cid_list);
194 kfree(acpi_dev);
195}
196
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800197static int acpi_device_suspend(struct device *dev, pm_message_t state)
Zhang Rui9e89dde2006-12-07 20:56:16 +0800198{
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800199 struct acpi_device *acpi_dev = to_acpi_device(dev);
200 struct acpi_driver *acpi_drv = acpi_dev->driver;
Zhang Rui9e89dde2006-12-07 20:56:16 +0800201
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800202 if (acpi_drv && acpi_drv->ops.suspend)
203 return acpi_drv->ops.suspend(acpi_dev, state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 return 0;
205}
206
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800207static int acpi_device_resume(struct device *dev)
208{
209 struct acpi_device *acpi_dev = to_acpi_device(dev);
210 struct acpi_driver *acpi_drv = acpi_dev->driver;
211
212 if (acpi_drv && acpi_drv->ops.resume)
213 return acpi_drv->ops.resume(acpi_dev);
214 return 0;
215}
216
217static int acpi_bus_match(struct device *dev, struct device_driver *drv)
218{
219 struct acpi_device *acpi_dev = to_acpi_device(dev);
220 struct acpi_driver *acpi_drv = to_acpi_driver(drv);
221
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800222 return !acpi_match_ids(acpi_dev, acpi_drv->ids);
223}
224
225static int acpi_device_uevent(struct device *dev, char **envp, int num_envp,
226 char *buffer, int buffer_size)
227{
228 struct acpi_device *acpi_dev = to_acpi_device(dev);
229 int i = 0, length = 0, ret = 0;
230
231 if (acpi_dev->flags.hardware_id)
232 ret = add_uevent_var(envp, num_envp, &i,
233 buffer, buffer_size, &length,
234 "HWID=%s", acpi_dev->pnp.hardware_id);
235 if (ret)
236 return -ENOMEM;
237 if (acpi_dev->flags.compatible_ids) {
238 int j;
239 struct acpi_compatible_id_list *cid_list;
240
241 cid_list = acpi_dev->pnp.cid_list;
242
243 for (j = 0; j < cid_list->count; j++) {
244 ret = add_uevent_var(envp, num_envp, &i, buffer,
245 buffer_size, &length, "COMPTID=%s",
246 cid_list->id[j].value);
247 if (ret)
248 return -ENOMEM;
Zhang Rui9e89dde2006-12-07 20:56:16 +0800249 }
250 }
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800251
252 envp[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 return 0;
254}
255
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800256static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
257static int acpi_start_single_object(struct acpi_device *);
258static int acpi_device_probe(struct device * dev)
Zhang Rui9e89dde2006-12-07 20:56:16 +0800259{
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800260 struct acpi_device *acpi_dev = to_acpi_device(dev);
261 struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
262 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800264 ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
265 if (!ret) {
Li Shaohuac4168bf2006-12-07 20:56:41 +0800266 if (acpi_dev->bus_ops.acpi_op_start)
267 acpi_start_single_object(acpi_dev);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800268 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
269 "Found driver [%s] for device [%s]\n",
270 acpi_drv->name, acpi_dev->pnp.bus_id));
271 get_device(dev);
Zhang Rui9e89dde2006-12-07 20:56:16 +0800272 }
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800273 return ret;
274}
275
276static int acpi_device_remove(struct device * dev)
277{
278 struct acpi_device *acpi_dev = to_acpi_device(dev);
279 struct acpi_driver *acpi_drv = acpi_dev->driver;
280
281 if (acpi_drv) {
282 if (acpi_drv->ops.stop)
Li Shaohua96333572006-12-07 20:56:46 +0800283 acpi_drv->ops.stop(acpi_dev, acpi_dev->removal_type);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800284 if (acpi_drv->ops.remove)
Li Shaohua96333572006-12-07 20:56:46 +0800285 acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type);
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800286 }
287 acpi_dev->driver = NULL;
288 acpi_driver_data(dev) = NULL;
289
290 put_device(dev);
Zhang Rui9e89dde2006-12-07 20:56:16 +0800291 return 0;
292}
293
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800294static void acpi_device_shutdown(struct device *dev)
Zhang Rui9e89dde2006-12-07 20:56:16 +0800295{
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800296 struct acpi_device *acpi_dev = to_acpi_device(dev);
297 struct acpi_driver *acpi_drv = acpi_dev->driver;
Zhang Rui9e89dde2006-12-07 20:56:16 +0800298
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800299 if (acpi_drv && acpi_drv->ops.shutdown)
300 acpi_drv->ops.shutdown(acpi_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800302 return ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303}
304
Zhang Rui9e89dde2006-12-07 20:56:16 +0800305static struct bus_type acpi_bus_type = {
306 .name = "acpi",
307 .suspend = acpi_device_suspend,
308 .resume = acpi_device_resume,
Patrick Mochel5d9464a2006-12-07 20:56:27 +0800309 .shutdown = acpi_device_shutdown,
310 .match = acpi_bus_match,
311 .probe = acpi_device_probe,
312 .remove = acpi_device_remove,
313 .uevent = acpi_device_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314};
315
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800316static int acpi_device_register(struct acpi_device *device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 struct acpi_device *parent)
318{
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800319 int result;
320 struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
321 int found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 /*
323 * Linkage
324 * -------
325 * Link this device to its parent and siblings.
326 */
327 INIT_LIST_HEAD(&device->children);
328 INIT_LIST_HEAD(&device->node);
329 INIT_LIST_HEAD(&device->g_list);
330 INIT_LIST_HEAD(&device->wakeup_list);
331
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800332 new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
333 if (!new_bus_id) {
334 printk(KERN_ERR PREFIX "Memory allocation error\n");
335 return -ENOMEM;
336 }
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 spin_lock(&acpi_device_lock);
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800339 /*
340 * Find suitable bus_id and instance number in acpi_bus_id_list
341 * If failed, create one and link it into acpi_bus_id_list
342 */
343 list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) {
Zhang Ruibb095852007-01-04 15:03:18 +0800344 if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) {
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800345 acpi_device_bus_id->instance_no ++;
346 found = 1;
347 kfree(new_bus_id);
348 break;
349 }
350 }
351 if(!found) {
352 acpi_device_bus_id = new_bus_id;
Zhang Ruibb095852007-01-04 15:03:18 +0800353 strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device");
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800354 acpi_device_bus_id->instance_no = 0;
355 list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list);
356 }
357 sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no);
358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 if (device->parent) {
360 list_add_tail(&device->node, &device->parent->children);
361 list_add_tail(&device->g_list, &device->parent->g_list);
362 } else
363 list_add_tail(&device->g_list, &acpi_device_list);
364 if (device->wakeup.flags.valid)
365 list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
366 spin_unlock(&acpi_device_lock);
367
Patrick Mochel1890a972006-12-07 20:56:31 +0800368 if (device->parent)
369 device->dev.parent = &parent->dev;
370 device->dev.bus = &acpi_bus_type;
371 device_initialize(&device->dev);
Patrick Mochel1890a972006-12-07 20:56:31 +0800372 device->dev.release = &acpi_device_release;
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800373 result = device_add(&device->dev);
374 if(result) {
375 printk("Error adding device %s", device->dev.bus_id);
376 goto end;
377 }
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800378
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800379 result = acpi_device_setup_files(device);
380 if(result)
381 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id));
382
Li Shaohua96333572006-12-07 20:56:46 +0800383 device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
Zhang Ruie49bd2d2006-12-08 17:23:43 +0800384 return 0;
385 end:
386 spin_lock(&acpi_device_lock);
387 if (device->parent) {
388 list_del(&device->node);
389 list_del(&device->g_list);
390 } else
391 list_del(&device->g_list);
392 list_del(&device->wakeup_list);
393 spin_unlock(&acpi_device_lock);
394 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395}
396
397static void acpi_device_unregister(struct acpi_device *device, int type)
398{
399 spin_lock(&acpi_device_lock);
400 if (device->parent) {
401 list_del(&device->node);
402 list_del(&device->g_list);
403 } else
404 list_del(&device->g_list);
405
406 list_del(&device->wakeup_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 spin_unlock(&acpi_device_lock);
408
409 acpi_detach_data(device->handle, acpi_bus_data_handler);
Patrick Mochel1890a972006-12-07 20:56:31 +0800410
Patrick Mochelf883d9d2006-12-07 20:56:38 +0800411 acpi_device_remove_files(device);
Patrick Mochel1890a972006-12-07 20:56:31 +0800412 device_unregister(&device->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413}
414
Zhang Rui9e89dde2006-12-07 20:56:16 +0800415/* --------------------------------------------------------------------------
416 Driver Management
417 -------------------------------------------------------------------------- */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500419 * acpi_bus_driver_init - add a device to a driver
420 * @device: the device to add and initialize
421 * @driver: driver for the device
422 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 * Used to initialize a device via its device driver. Called whenever a
Patrick Mochel1890a972006-12-07 20:56:31 +0800424 * driver is bound to a device. Invokes the driver's add() ops.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 */
426static int
Len Brown4be44fc2005-08-05 00:44:28 -0400427acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428{
Len Brown4be44fc2005-08-05 00:44:28 -0400429 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432 if (!device || !driver)
Patrick Mocheld550d982006-06-27 00:41:40 -0400433 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
435 if (!driver->ops.add)
Patrick Mocheld550d982006-06-27 00:41:40 -0400436 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
438 result = driver->ops.add(device);
439 if (result) {
440 device->driver = NULL;
441 acpi_driver_data(device) = NULL;
Patrick Mocheld550d982006-06-27 00:41:40 -0400442 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 }
444
445 device->driver = driver;
446
447 /*
448 * TBD - Configuration Management: Assign resources to device based
449 * upon possible configuration and currently allocated resources.
450 */
451
Len Brown4be44fc2005-08-05 00:44:28 -0400452 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
453 "Driver successfully bound to device\n"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400454 return 0;
Rajesh Shah3fb02732005-04-28 00:25:52 -0700455}
456
Adrian Bunk8713cbe2005-09-02 17:16:48 -0400457static int acpi_start_single_object(struct acpi_device *device)
Rajesh Shah3fb02732005-04-28 00:25:52 -0700458{
459 int result = 0;
460 struct acpi_driver *driver;
461
Rajesh Shah3fb02732005-04-28 00:25:52 -0700462
463 if (!(driver = device->driver))
Patrick Mocheld550d982006-06-27 00:41:40 -0400464 return 0;
Rajesh Shah3fb02732005-04-28 00:25:52 -0700465
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 if (driver->ops.start) {
467 result = driver->ops.start(device);
468 if (result && driver->ops.remove)
469 driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 }
471
Patrick Mocheld550d982006-06-27 00:41:40 -0400472 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473}
474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500476 * acpi_bus_register_driver - register a driver with the ACPI bus
477 * @driver: driver being registered
478 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 * Registers a driver with the ACPI bus. Searches the namespace for all
Bjorn Helgaas9d9f7492006-03-28 17:04:00 -0500480 * devices that match the driver's criteria and binds. Returns zero for
481 * success or a negative error status for failure.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 */
Len Brown4be44fc2005-08-05 00:44:28 -0400483int acpi_bus_register_driver(struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484{
Patrick Mochel1890a972006-12-07 20:56:31 +0800485 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
487 if (acpi_disabled)
Patrick Mocheld550d982006-06-27 00:41:40 -0400488 return -ENODEV;
Patrick Mochel1890a972006-12-07 20:56:31 +0800489 driver->drv.name = driver->name;
490 driver->drv.bus = &acpi_bus_type;
491 driver->drv.owner = driver->owner;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Patrick Mochel1890a972006-12-07 20:56:31 +0800493 ret = driver_register(&driver->drv);
494 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
Len Brown4be44fc2005-08-05 00:44:28 -0400497EXPORT_SYMBOL(acpi_bus_register_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499/**
Randy Dunlapd758a8f2006-01-06 01:31:00 -0500500 * acpi_bus_unregister_driver - unregisters a driver with the APIC bus
501 * @driver: driver to unregister
502 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 * Unregisters a driver with the ACPI bus. Searches the namespace for all
504 * devices that match the driver's criteria and unbinds.
505 */
Bjorn Helgaas06ea8e02006-04-27 05:25:00 -0400506void acpi_bus_unregister_driver(struct acpi_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507{
Patrick Mochel1890a972006-12-07 20:56:31 +0800508 driver_unregister(&driver->drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509}
Len Brown4be44fc2005-08-05 00:44:28 -0400510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511EXPORT_SYMBOL(acpi_bus_unregister_driver);
512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513/* --------------------------------------------------------------------------
514 Device Enumeration
515 -------------------------------------------------------------------------- */
Len Brownc8f7a622006-07-09 17:22:28 -0400516acpi_status
517acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd)
518{
519 acpi_status status;
520 acpi_handle tmp;
521 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
522 union acpi_object *obj;
523
524 status = acpi_get_handle(handle, "_EJD", &tmp);
525 if (ACPI_FAILURE(status))
526 return status;
527
528 status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer);
529 if (ACPI_SUCCESS(status)) {
530 obj = buffer.pointer;
531 status = acpi_get_handle(NULL, obj->string.pointer, ejd);
532 kfree(buffer.pointer);
533 }
534 return status;
535}
536EXPORT_SYMBOL_GPL(acpi_bus_get_ejd);
537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context)
539{
540
541 /* TBD */
542
543 return;
544}
545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546int acpi_match_ids(struct acpi_device *device, char *ids)
547{
548 if (device->flags.hardware_id)
549 if (strstr(ids, device->pnp.hardware_id))
550 return 0;
551
552 if (device->flags.compatible_ids) {
553 struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
554 int i;
555
556 /* compare multiple _CID entries against driver ids */
557 for (i = 0; i < cid_list->count; i++) {
558 if (strstr(ids, cid_list->id[i].value))
559 return 0;
560 }
561 }
562 return -ENOENT;
563}
564
Zhang Rui9e89dde2006-12-07 20:56:16 +0800565static int acpi_bus_get_perf_flags(struct acpi_device *device)
566{
567 device->performance.state = ACPI_STATE_UNKNOWN;
568 return 0;
569}
570
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571static acpi_status
572acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
573 union acpi_object *package)
574{
575 int i = 0;
576 union acpi_object *element = NULL;
577
578 if (!device || !package || (package->package.count < 2))
579 return AE_BAD_PARAMETER;
580
581 element = &(package->package.elements[0]);
582 if (!element)
583 return AE_BAD_PARAMETER;
584 if (element->type == ACPI_TYPE_PACKAGE) {
585 if ((element->package.count < 2) ||
586 (element->package.elements[0].type !=
587 ACPI_TYPE_LOCAL_REFERENCE)
588 || (element->package.elements[1].type != ACPI_TYPE_INTEGER))
589 return AE_BAD_DATA;
590 device->wakeup.gpe_device =
591 element->package.elements[0].reference.handle;
592 device->wakeup.gpe_number =
593 (u32) element->package.elements[1].integer.value;
594 } else if (element->type == ACPI_TYPE_INTEGER) {
595 device->wakeup.gpe_number = element->integer.value;
596 } else
597 return AE_BAD_DATA;
598
599 element = &(package->package.elements[1]);
600 if (element->type != ACPI_TYPE_INTEGER) {
601 return AE_BAD_DATA;
602 }
603 device->wakeup.sleep_state = element->integer.value;
604
605 if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
606 return AE_NO_MEMORY;
607 }
608 device->wakeup.resources.count = package->package.count - 2;
609 for (i = 0; i < device->wakeup.resources.count; i++) {
610 element = &(package->package.elements[i + 2]);
611 if (element->type != ACPI_TYPE_ANY) {
612 return AE_BAD_DATA;
613 }
614
615 device->wakeup.resources.handles[i] = element->reference.handle;
616 }
617
618 return AE_OK;
619}
620
621static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
622{
623 acpi_status status = 0;
624 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
625 union acpi_object *package = NULL;
626
627
628 /* _PRW */
629 status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
630 if (ACPI_FAILURE(status)) {
631 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
632 goto end;
633 }
634
635 package = (union acpi_object *)buffer.pointer;
636 status = acpi_bus_extract_wakeup_device_power_package(device, package);
637 if (ACPI_FAILURE(status)) {
638 ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
639 goto end;
640 }
641
642 kfree(buffer.pointer);
643
644 device->wakeup.flags.valid = 1;
645 /* Power button, Lid switch always enable wakeup */
646 if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E"))
647 device->wakeup.flags.run_wake = 1;
648
649 end:
650 if (ACPI_FAILURE(status))
651 device->flags.wake_capable = 0;
652 return 0;
653}
654
Zhang Rui9e89dde2006-12-07 20:56:16 +0800655static int acpi_bus_get_power_flags(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656{
Zhang Rui9e89dde2006-12-07 20:56:16 +0800657 acpi_status status = 0;
658 acpi_handle handle = NULL;
659 u32 i = 0;
660
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
662 /*
Zhang Rui9e89dde2006-12-07 20:56:16 +0800663 * Power Management Flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 */
Zhang Rui9e89dde2006-12-07 20:56:16 +0800665 status = acpi_get_handle(device->handle, "_PSC", &handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 if (ACPI_SUCCESS(status))
Zhang Rui9e89dde2006-12-07 20:56:16 +0800667 device->power.flags.explicit_get = 1;
668 status = acpi_get_handle(device->handle, "_IRC", &handle);
669 if (ACPI_SUCCESS(status))
670 device->power.flags.inrush_current = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
672 /*
Zhang Rui9e89dde2006-12-07 20:56:16 +0800673 * Enumerate supported power management states
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 */
Zhang Rui9e89dde2006-12-07 20:56:16 +0800675 for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
676 struct acpi_device_power_state *ps = &device->power.states[i];
677 char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Zhang Rui9e89dde2006-12-07 20:56:16 +0800679 /* Evaluate "_PRx" to se if power resources are referenced */
680 acpi_evaluate_reference(device->handle, object_name, NULL,
681 &ps->resources);
682 if (ps->resources.count) {
683 device->power.flags.power_resources = 1;
684 ps->flags.valid = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Zhang Rui9e89dde2006-12-07 20:56:16 +0800687 /* Evaluate "_PSx" to see if we can do explicit sets */
688 object_name[2] = 'S';
689 status = acpi_get_handle(device->handle, object_name, &handle);
690 if (ACPI_SUCCESS(status)) {
691 ps->flags.explicit_set = 1;
692 ps->flags.valid = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 }
Zhang Rui9e89dde2006-12-07 20:56:16 +0800694
695 /* State is valid if we have some power control */
696 if (ps->resources.count || ps->flags.explicit_set)
697 ps->flags.valid = 1;
698
699 ps->power = -1; /* Unknown - driver assigned */
700 ps->latency = -1; /* Unknown - driver assigned */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
Zhang Rui9e89dde2006-12-07 20:56:16 +0800703 /* Set defaults for D0 and D3 states (always valid) */
704 device->power.states[ACPI_STATE_D0].flags.valid = 1;
705 device->power.states[ACPI_STATE_D0].power = 100;
706 device->power.states[ACPI_STATE_D3].flags.valid = 1;
707 device->power.states[ACPI_STATE_D3].power = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
Zhang Rui9e89dde2006-12-07 20:56:16 +0800709 /* TBD: System wake support and resource requirements. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
Zhang Rui9e89dde2006-12-07 20:56:16 +0800711 device->power.state = ACPI_STATE_UNKNOWN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713 return 0;
714}
715
Len Brown4be44fc2005-08-05 00:44:28 -0400716static int acpi_bus_get_flags(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717{
Len Brown4be44fc2005-08-05 00:44:28 -0400718 acpi_status status = AE_OK;
719 acpi_handle temp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
722 /* Presence of _STA indicates 'dynamic_status' */
723 status = acpi_get_handle(device->handle, "_STA", &temp);
724 if (ACPI_SUCCESS(status))
725 device->flags.dynamic_status = 1;
726
727 /* Presence of _CID indicates 'compatible_ids' */
728 status = acpi_get_handle(device->handle, "_CID", &temp);
729 if (ACPI_SUCCESS(status))
730 device->flags.compatible_ids = 1;
731
732 /* Presence of _RMV indicates 'removable' */
733 status = acpi_get_handle(device->handle, "_RMV", &temp);
734 if (ACPI_SUCCESS(status))
735 device->flags.removable = 1;
736
737 /* Presence of _EJD|_EJ0 indicates 'ejectable' */
738 status = acpi_get_handle(device->handle, "_EJD", &temp);
739 if (ACPI_SUCCESS(status))
740 device->flags.ejectable = 1;
741 else {
742 status = acpi_get_handle(device->handle, "_EJ0", &temp);
743 if (ACPI_SUCCESS(status))
744 device->flags.ejectable = 1;
745 }
746
747 /* Presence of _LCK indicates 'lockable' */
748 status = acpi_get_handle(device->handle, "_LCK", &temp);
749 if (ACPI_SUCCESS(status))
750 device->flags.lockable = 1;
751
752 /* Presence of _PS0|_PR0 indicates 'power manageable' */
753 status = acpi_get_handle(device->handle, "_PS0", &temp);
754 if (ACPI_FAILURE(status))
755 status = acpi_get_handle(device->handle, "_PR0", &temp);
756 if (ACPI_SUCCESS(status))
757 device->flags.power_manageable = 1;
758
759 /* Presence of _PRW indicates wake capable */
760 status = acpi_get_handle(device->handle, "_PRW", &temp);
761 if (ACPI_SUCCESS(status))
762 device->flags.wake_capable = 1;
763
764 /* TBD: Peformance management */
765
Patrick Mocheld550d982006-06-27 00:41:40 -0400766 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767}
768
Len Brown4be44fc2005-08-05 00:44:28 -0400769static void acpi_device_get_busid(struct acpi_device *device,
770 acpi_handle handle, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771{
Len Brown4be44fc2005-08-05 00:44:28 -0400772 char bus_id[5] = { '?', 0 };
773 struct acpi_buffer buffer = { sizeof(bus_id), bus_id };
774 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
776 /*
777 * Bus ID
778 * ------
779 * The device's Bus ID is simply the object name.
780 * TBD: Shouldn't this value be unique (within the ACPI namespace)?
781 */
782 switch (type) {
783 case ACPI_BUS_TYPE_SYSTEM:
784 strcpy(device->pnp.bus_id, "ACPI");
785 break;
786 case ACPI_BUS_TYPE_POWER_BUTTON:
787 strcpy(device->pnp.bus_id, "PWRF");
788 break;
789 case ACPI_BUS_TYPE_SLEEP_BUTTON:
790 strcpy(device->pnp.bus_id, "SLPF");
791 break;
792 default:
793 acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
794 /* Clean up trailing underscores (if any) */
795 for (i = 3; i > 1; i--) {
796 if (bus_id[i] == '_')
797 bus_id[i] = '\0';
798 else
799 break;
800 }
801 strcpy(device->pnp.bus_id, bus_id);
802 break;
803 }
804}
805
Zhang Ruiae843332006-12-07 20:57:10 +0800806static int
807acpi_video_bus_match(struct acpi_device *device)
808{
809 acpi_handle h_dummy1;
810 acpi_handle h_dummy2;
811 acpi_handle h_dummy3;
812
813
814 if (!device)
815 return -EINVAL;
816
817 /* Since there is no HID, CID for ACPI Video drivers, we have
818 * to check well known required nodes for each feature we support.
819 */
820
821 /* Does this device able to support video switching ? */
822 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
823 ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
824 return 0;
825
826 /* Does this device able to retrieve a video ROM ? */
827 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
828 return 0;
829
830 /* Does this device able to configure which video head to be POSTed ? */
831 if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
832 ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
833 ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
834 return 0;
835
836 return -ENODEV;
837}
838
Zhang Rui54735262007-01-11 02:09:09 -0500839/*
840 * acpi_bay_match - see if a device is an ejectable driver bay
841 *
842 * If an acpi object is ejectable and has one of the ACPI ATA methods defined,
843 * then we can safely call it an ejectable drive bay
844 */
845static int acpi_bay_match(struct acpi_device *device){
846 acpi_status status;
847 acpi_handle handle;
848 acpi_handle tmp;
849 acpi_handle phandle;
850
851 handle = device->handle;
852
853 status = acpi_get_handle(handle, "_EJ0", &tmp);
854 if (ACPI_FAILURE(status))
855 return -ENODEV;
856
857 if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
858 (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
859 (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
860 (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
861 return 0;
862
863 if (acpi_get_parent(handle, &phandle))
864 return -ENODEV;
865
866 if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
867 (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
868 (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
869 (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
870 return 0;
871
872 return -ENODEV;
873}
874
Len Brown4be44fc2005-08-05 00:44:28 -0400875static void acpi_device_set_id(struct acpi_device *device,
876 struct acpi_device *parent, acpi_handle handle,
877 int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878{
Len Brown4be44fc2005-08-05 00:44:28 -0400879 struct acpi_device_info *info;
880 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
881 char *hid = NULL;
882 char *uid = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 struct acpi_compatible_id_list *cid_list = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400884 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885
886 switch (type) {
887 case ACPI_BUS_TYPE_DEVICE:
888 status = acpi_get_object_info(handle, &buffer);
889 if (ACPI_FAILURE(status)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400890 printk("%s: Error reading device info\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 return;
892 }
893
894 info = buffer.pointer;
895 if (info->valid & ACPI_VALID_HID)
896 hid = info->hardware_id.value;
897 if (info->valid & ACPI_VALID_UID)
898 uid = info->unique_id.value;
899 if (info->valid & ACPI_VALID_CID)
900 cid_list = &info->compatibility_id;
901 if (info->valid & ACPI_VALID_ADR) {
902 device->pnp.bus_address = info->address;
903 device->flags.bus_address = 1;
904 }
Zhang Ruiae843332006-12-07 20:57:10 +0800905
906 if(!(info->valid & (ACPI_VALID_HID | ACPI_VALID_CID))){
907 status = acpi_video_bus_match(device);
908 if(ACPI_SUCCESS(status))
909 hid = ACPI_VIDEO_HID;
Zhang Rui54735262007-01-11 02:09:09 -0500910
911 status = acpi_bay_match(device);
912 if (ACPI_SUCCESS(status))
913 hid = ACPI_BAY_HID;
Zhang Ruiae843332006-12-07 20:57:10 +0800914 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 break;
916 case ACPI_BUS_TYPE_POWER:
917 hid = ACPI_POWER_HID;
918 break;
919 case ACPI_BUS_TYPE_PROCESSOR:
920 hid = ACPI_PROCESSOR_HID;
921 break;
922 case ACPI_BUS_TYPE_SYSTEM:
923 hid = ACPI_SYSTEM_HID;
924 break;
925 case ACPI_BUS_TYPE_THERMAL:
926 hid = ACPI_THERMAL_HID;
927 break;
928 case ACPI_BUS_TYPE_POWER_BUTTON:
929 hid = ACPI_BUTTON_HID_POWERF;
930 break;
931 case ACPI_BUS_TYPE_SLEEP_BUTTON:
932 hid = ACPI_BUTTON_HID_SLEEPF;
933 break;
934 }
935
936 /*
937 * \_SB
938 * ----
939 * Fix for the system root bus device -- the only root-level device.
940 */
Bob Moorec51a4de2005-11-17 13:07:00 -0500941 if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 hid = ACPI_BUS_HID;
943 strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
944 strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
945 }
946
947 if (hid) {
948 strcpy(device->pnp.hardware_id, hid);
949 device->flags.hardware_id = 1;
950 }
951 if (uid) {
952 strcpy(device->pnp.unique_id, uid);
953 device->flags.unique_id = 1;
954 }
955 if (cid_list) {
956 device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL);
957 if (device->pnp.cid_list)
958 memcpy(device->pnp.cid_list, cid_list, cid_list->size);
959 else
960 printk(KERN_ERR "Memory allocation error\n");
961 }
962
Len Brown02438d82006-06-30 03:19:10 -0400963 kfree(buffer.pointer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964}
965
Len Brown4be44fc2005-08-05 00:44:28 -0400966static int acpi_device_set_context(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967{
968 acpi_status status = AE_OK;
969 int result = 0;
970 /*
971 * Context
972 * -------
973 * Attach this 'struct acpi_device' to the ACPI object. This makes
974 * resolutions from handle->device very efficient. Note that we need
975 * to be careful with fixed-feature devices as they all attach to the
976 * root object.
977 */
Len Brown4be44fc2005-08-05 00:44:28 -0400978 if (type != ACPI_BUS_TYPE_POWER_BUTTON &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 type != ACPI_BUS_TYPE_SLEEP_BUTTON) {
980 status = acpi_attach_data(device->handle,
Len Brown4be44fc2005-08-05 00:44:28 -0400981 acpi_bus_data_handler, device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
983 if (ACPI_FAILURE(status)) {
984 printk("Error attaching device data\n");
985 result = -ENODEV;
986 }
987 }
988 return result;
989}
990
Len Brown4be44fc2005-08-05 00:44:28 -0400991static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 if (!dev)
Patrick Mocheld550d982006-06-27 00:41:40 -0400994 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
Li Shaohua96333572006-12-07 20:56:46 +0800996 dev->removal_type = ACPI_BUS_REMOVAL_EJECT;
Patrick Mochel1890a972006-12-07 20:56:31 +0800997 device_release_driver(&dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
999 if (!rmdevice)
Patrick Mocheld550d982006-06-27 00:41:40 -04001000 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001
Rui Zhang2786f6e2006-12-21 02:21:13 -05001002 /*
1003 * unbind _ADR-Based Devices when hot removal
1004 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 if (dev->flags.bus_address) {
1006 if ((dev->parent) && (dev->parent->ops.unbind))
1007 dev->parent->ops.unbind(dev);
1008 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
1010
Patrick Mocheld550d982006-06-27 00:41:40 -04001011 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012}
1013
Rajesh Shah3fb02732005-04-28 00:25:52 -07001014static int
Len Brown4be44fc2005-08-05 00:44:28 -04001015acpi_add_single_object(struct acpi_device **child,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001016 struct acpi_device *parent, acpi_handle handle, int type,
1017 struct acpi_bus_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018{
Len Brown4be44fc2005-08-05 00:44:28 -04001019 int result = 0;
1020 struct acpi_device *device = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
1023 if (!child)
Patrick Mocheld550d982006-06-27 00:41:40 -04001024 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025
Burman Yan36bcbec2006-12-19 12:56:11 -08001026 device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 if (!device) {
Len Brown64684632006-06-26 23:41:38 -04001028 printk(KERN_ERR PREFIX "Memory allocation error\n");
Patrick Mocheld550d982006-06-27 00:41:40 -04001029 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
1032 device->handle = handle;
1033 device->parent = parent;
Li Shaohuac4168bf2006-12-07 20:56:41 +08001034 device->bus_ops = *ops; /* workround for not call .start */
1035
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036
Len Brown4be44fc2005-08-05 00:44:28 -04001037 acpi_device_get_busid(device, handle, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
1039 /*
1040 * Flags
1041 * -----
1042 * Get prior to calling acpi_bus_get_status() so we know whether
1043 * or not _STA is present. Note that we only look for object
1044 * handles -- cannot evaluate objects until we know the device is
1045 * present and properly initialized.
1046 */
1047 result = acpi_bus_get_flags(device);
1048 if (result)
1049 goto end;
1050
1051 /*
1052 * Status
1053 * ------
Keiichiro Tokunaga6940fab2005-03-30 23:15:47 -05001054 * See if the device is present. We always assume that non-Device
1055 * and non-Processor objects (e.g. thermal zones, power resources,
1056 * etc.) are present, functioning, etc. (at least when parent object
1057 * is present). Note that _STA has a different meaning for some
1058 * objects (e.g. power resources) so we need to be careful how we use
1059 * it.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 */
1061 switch (type) {
Keiichiro Tokunaga6940fab2005-03-30 23:15:47 -05001062 case ACPI_BUS_TYPE_PROCESSOR:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 case ACPI_BUS_TYPE_DEVICE:
1064 result = acpi_bus_get_status(device);
1065 if (ACPI_FAILURE(result) || !device->status.present) {
1066 result = -ENOENT;
1067 goto end;
1068 }
1069 break;
1070 default:
1071 STRUCT_TO_INT(device->status) = 0x0F;
1072 break;
1073 }
1074
1075 /*
1076 * Initialize Device
1077 * -----------------
1078 * TBD: Synch with Core's enumeration/initialization process.
1079 */
1080
1081 /*
1082 * Hardware ID, Unique ID, & Bus Address
1083 * -------------------------------------
1084 */
Len Brown4be44fc2005-08-05 00:44:28 -04001085 acpi_device_set_id(device, parent, handle, type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
1087 /*
1088 * Power Management
1089 * ----------------
1090 */
1091 if (device->flags.power_manageable) {
1092 result = acpi_bus_get_power_flags(device);
1093 if (result)
1094 goto end;
1095 }
1096
Len Brown4be44fc2005-08-05 00:44:28 -04001097 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 * Wakeup device management
1099 *-----------------------
1100 */
1101 if (device->flags.wake_capable) {
1102 result = acpi_bus_get_wakeup_device_flags(device);
1103 if (result)
1104 goto end;
1105 }
1106
1107 /*
1108 * Performance Management
1109 * ----------------------
1110 */
1111 if (device->flags.performance_manageable) {
1112 result = acpi_bus_get_perf_flags(device);
1113 if (result)
1114 goto end;
1115 }
1116
Len Brown4be44fc2005-08-05 00:44:28 -04001117 if ((result = acpi_device_set_context(device, type)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 goto end;
1119
Zhang Ruie49bd2d2006-12-08 17:23:43 +08001120 result = acpi_device_register(device, parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121
1122 /*
Rui Zhang2786f6e2006-12-21 02:21:13 -05001123 * Bind _ADR-Based Devices when hot add
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 */
1125 if (device->flags.bus_address) {
1126 if (device->parent && device->parent->ops.bind)
1127 device->parent->ops.bind(device);
1128 }
1129
Len Brown4be44fc2005-08-05 00:44:28 -04001130 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 if (!result)
1132 *child = device;
1133 else {
Jesper Juhl6044ec82005-11-07 01:01:32 -08001134 kfree(device->pnp.cid_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 kfree(device);
1136 }
1137
Patrick Mocheld550d982006-06-27 00:41:40 -04001138 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
Len Brown4be44fc2005-08-05 00:44:28 -04001141static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142{
Len Brown4be44fc2005-08-05 00:44:28 -04001143 acpi_status status = AE_OK;
1144 struct acpi_device *parent = NULL;
1145 struct acpi_device *child = NULL;
1146 acpi_handle phandle = NULL;
1147 acpi_handle chandle = NULL;
1148 acpi_object_type type = 0;
1149 u32 level = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
1152 if (!start)
Patrick Mocheld550d982006-06-27 00:41:40 -04001153 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154
1155 parent = start;
1156 phandle = start->handle;
Len Brown4be44fc2005-08-05 00:44:28 -04001157
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 /*
1159 * Parse through the ACPI namespace, identify all 'devices', and
1160 * create a new 'struct acpi_device' for each.
1161 */
1162 while ((level > 0) && parent) {
1163
1164 status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
Len Brown4be44fc2005-08-05 00:44:28 -04001165 chandle, &chandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
1167 /*
1168 * If this scope is exhausted then move our way back up.
1169 */
1170 if (ACPI_FAILURE(status)) {
1171 level--;
1172 chandle = phandle;
1173 acpi_get_parent(phandle, &phandle);
1174 if (parent->parent)
1175 parent = parent->parent;
1176 continue;
1177 }
1178
1179 status = acpi_get_type(chandle, &type);
1180 if (ACPI_FAILURE(status))
1181 continue;
1182
1183 /*
1184 * If this is a scope object then parse it (depth-first).
1185 */
1186 if (type == ACPI_TYPE_LOCAL_SCOPE) {
1187 level++;
1188 phandle = chandle;
1189 chandle = NULL;
1190 continue;
1191 }
1192
1193 /*
1194 * We're only interested in objects that we consider 'devices'.
1195 */
1196 switch (type) {
1197 case ACPI_TYPE_DEVICE:
1198 type = ACPI_BUS_TYPE_DEVICE;
1199 break;
1200 case ACPI_TYPE_PROCESSOR:
1201 type = ACPI_BUS_TYPE_PROCESSOR;
1202 break;
1203 case ACPI_TYPE_THERMAL:
1204 type = ACPI_BUS_TYPE_THERMAL;
1205 break;
1206 case ACPI_TYPE_POWER:
1207 type = ACPI_BUS_TYPE_POWER;
1208 break;
1209 default:
1210 continue;
1211 }
1212
Rajesh Shah3fb02732005-04-28 00:25:52 -07001213 if (ops->acpi_op_add)
1214 status = acpi_add_single_object(&child, parent,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001215 chandle, type, ops);
Len Brown4be44fc2005-08-05 00:44:28 -04001216 else
Rajesh Shah3fb02732005-04-28 00:25:52 -07001217 status = acpi_bus_get_device(chandle, &child);
1218
Len Brown4be44fc2005-08-05 00:44:28 -04001219 if (ACPI_FAILURE(status))
1220 continue;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001221
Li Shaohuac4168bf2006-12-07 20:56:41 +08001222 if (ops->acpi_op_start && !(ops->acpi_op_add)) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001223 status = acpi_start_single_object(child);
1224 if (ACPI_FAILURE(status))
1225 continue;
1226 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
1228 /*
1229 * If the device is present, enabled, and functioning then
1230 * parse its scope (depth-first). Note that we need to
1231 * represent absent devices to facilitate PnP notifications
1232 * -- but only the subtree head (not all of its children,
1233 * which will be enumerated when the parent is inserted).
1234 *
1235 * TBD: Need notifications and other detection mechanisms
Len Brown4be44fc2005-08-05 00:44:28 -04001236 * in place before we can fully implement this.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 */
1238 if (child->status.present) {
1239 status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
1240 NULL, NULL);
1241 if (ACPI_SUCCESS(status)) {
1242 level++;
1243 phandle = chandle;
1244 chandle = NULL;
1245 parent = child;
1246 }
1247 }
1248 }
1249
Patrick Mocheld550d982006-06-27 00:41:40 -04001250 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
Rajesh Shah3fb02732005-04-28 00:25:52 -07001253int
Len Brown4be44fc2005-08-05 00:44:28 -04001254acpi_bus_add(struct acpi_device **child,
1255 struct acpi_device *parent, acpi_handle handle, int type)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001256{
1257 int result;
1258 struct acpi_bus_ops ops;
1259
Li Shaohuac4168bf2006-12-07 20:56:41 +08001260 memset(&ops, 0, sizeof(ops));
1261 ops.acpi_op_add = 1;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001262
Li Shaohuac4168bf2006-12-07 20:56:41 +08001263 result = acpi_add_single_object(child, parent, handle, type, &ops);
1264 if (!result)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001265 result = acpi_bus_scan(*child, &ops);
Li Shaohuac4168bf2006-12-07 20:56:41 +08001266
Patrick Mocheld550d982006-06-27 00:41:40 -04001267 return result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001268}
Len Brown4be44fc2005-08-05 00:44:28 -04001269
Rajesh Shah3fb02732005-04-28 00:25:52 -07001270EXPORT_SYMBOL(acpi_bus_add);
1271
Len Brown4be44fc2005-08-05 00:44:28 -04001272int acpi_bus_start(struct acpi_device *device)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001273{
1274 int result;
1275 struct acpi_bus_ops ops;
1276
Rajesh Shah3fb02732005-04-28 00:25:52 -07001277
1278 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001279 return -EINVAL;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001280
1281 result = acpi_start_single_object(device);
1282 if (!result) {
1283 memset(&ops, 0, sizeof(ops));
1284 ops.acpi_op_start = 1;
1285 result = acpi_bus_scan(device, &ops);
1286 }
Patrick Mocheld550d982006-06-27 00:41:40 -04001287 return result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001288}
Len Brown4be44fc2005-08-05 00:44:28 -04001289
Rajesh Shah3fb02732005-04-28 00:25:52 -07001290EXPORT_SYMBOL(acpi_bus_start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291
Kristen Accardiceaba662006-02-23 17:56:01 -08001292int acpi_bus_trim(struct acpi_device *start, int rmdevice)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293{
Len Brown4be44fc2005-08-05 00:44:28 -04001294 acpi_status status;
1295 struct acpi_device *parent, *child;
1296 acpi_handle phandle, chandle;
1297 acpi_object_type type;
1298 u32 level = 1;
1299 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300
Len Brown4be44fc2005-08-05 00:44:28 -04001301 parent = start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 phandle = start->handle;
1303 child = chandle = NULL;
1304
1305 while ((level > 0) && parent && (!err)) {
1306 status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
Len Brown4be44fc2005-08-05 00:44:28 -04001307 chandle, &chandle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308
1309 /*
1310 * If this scope is exhausted then move our way back up.
1311 */
1312 if (ACPI_FAILURE(status)) {
1313 level--;
1314 chandle = phandle;
1315 acpi_get_parent(phandle, &phandle);
1316 child = parent;
1317 parent = parent->parent;
1318
1319 if (level == 0)
1320 err = acpi_bus_remove(child, rmdevice);
1321 else
1322 err = acpi_bus_remove(child, 1);
1323
1324 continue;
1325 }
1326
1327 status = acpi_get_type(chandle, &type);
1328 if (ACPI_FAILURE(status)) {
1329 continue;
1330 }
1331 /*
1332 * If there is a device corresponding to chandle then
1333 * parse it (depth-first).
1334 */
1335 if (acpi_bus_get_device(chandle, &child) == 0) {
1336 level++;
1337 phandle = chandle;
1338 chandle = NULL;
1339 parent = child;
1340 }
1341 continue;
1342 }
1343 return err;
1344}
Kristen Accardiceaba662006-02-23 17:56:01 -08001345EXPORT_SYMBOL_GPL(acpi_bus_trim);
1346
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347
Len Brown4be44fc2005-08-05 00:44:28 -04001348static int acpi_bus_scan_fixed(struct acpi_device *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349{
Len Brown4be44fc2005-08-05 00:44:28 -04001350 int result = 0;
1351 struct acpi_device *device = NULL;
Li Shaohuac4168bf2006-12-07 20:56:41 +08001352 struct acpi_bus_ops ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353
1354 if (!root)
Patrick Mocheld550d982006-06-27 00:41:40 -04001355 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356
Li Shaohuac4168bf2006-12-07 20:56:41 +08001357 memset(&ops, 0, sizeof(ops));
1358 ops.acpi_op_add = 1;
1359 ops.acpi_op_start = 1;
1360
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 /*
1362 * Enumerate all fixed-feature devices.
1363 */
Alexey Starikovskiycee324b2007-02-02 19:48:22 +03001364 if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001365 result = acpi_add_single_object(&device, acpi_root,
Len Brown4be44fc2005-08-05 00:44:28 -04001366 NULL,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001367 ACPI_BUS_TYPE_POWER_BUTTON,
1368 &ops);
Rajesh Shah3fb02732005-04-28 00:25:52 -07001369 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
Alexey Starikovskiycee324b2007-02-02 19:48:22 +03001371 if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
Rajesh Shah3fb02732005-04-28 00:25:52 -07001372 result = acpi_add_single_object(&device, acpi_root,
Len Brown4be44fc2005-08-05 00:44:28 -04001373 NULL,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001374 ACPI_BUS_TYPE_SLEEP_BUTTON,
1375 &ops);
Rajesh Shah3fb02732005-04-28 00:25:52 -07001376 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Patrick Mocheld550d982006-06-27 00:41:40 -04001378 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379}
1380
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381static int __init acpi_scan_init(void)
1382{
1383 int result;
Rajesh Shah3fb02732005-04-28 00:25:52 -07001384 struct acpi_bus_ops ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
1387 if (acpi_disabled)
Patrick Mocheld550d982006-06-27 00:41:40 -04001388 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389
Li Shaohuac4168bf2006-12-07 20:56:41 +08001390 memset(&ops, 0, sizeof(ops));
1391 ops.acpi_op_add = 1;
1392 ops.acpi_op_start = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393
Patrick Mochel5b327262006-05-10 10:33:00 -04001394 result = bus_register(&acpi_bus_type);
1395 if (result) {
1396 /* We don't want to quit even if we failed to add suspend/resume */
1397 printk(KERN_ERR PREFIX "Could not register bus type\n");
1398 }
1399
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 /*
1401 * Create the root device in the bus's device tree
1402 */
Rajesh Shah3fb02732005-04-28 00:25:52 -07001403 result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT,
Li Shaohuac4168bf2006-12-07 20:56:41 +08001404 ACPI_BUS_TYPE_SYSTEM, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 if (result)
1406 goto Done;
1407
1408 /*
1409 * Enumerate devices in the ACPI namespace.
1410 */
1411 result = acpi_bus_scan_fixed(acpi_root);
Li Shaohuac4168bf2006-12-07 20:56:41 +08001412 if (!result)
Rajesh Shah3fb02732005-04-28 00:25:52 -07001413 result = acpi_bus_scan(acpi_root, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414
1415 if (result)
1416 acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
1417
Len Brown4be44fc2005-08-05 00:44:28 -04001418 Done:
Patrick Mocheld550d982006-06-27 00:41:40 -04001419 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420}
1421
1422subsys_initcall(acpi_scan_init);