static const char *dummy_hid = "device";
-/*
- * The following ACPI IDs are known to be suitable for representing as
- * platform devices.
- */
-static const struct acpi_device_id acpi_platform_device_ids[] = {
-
- { "PNP0D40" },
-
- /* Haswell LPSS devices */
- { "INT33C0", 0 },
- { "INT33C1", 0 },
- { "INT33C2", 0 },
- { "INT33C3", 0 },
- { "INT33C4", 0 },
- { "INT33C5", 0 },
- { "INT33C6", 0 },
- { "INT33C7", 0 },
-
- { }
-};
-
static LIST_HEAD(acpi_device_list);
static LIST_HEAD(acpi_bus_id_list);
static DEFINE_MUTEX(acpi_scan_lock);
+static LIST_HEAD(acpi_scan_handlers_list);
DEFINE_MUTEX(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
struct list_head node;
};
+void acpi_scan_lock_acquire(void)
+{
+ mutex_lock(&acpi_scan_lock);
+}
+EXPORT_SYMBOL_GPL(acpi_scan_lock_acquire);
+
+void acpi_scan_lock_release(void)
+{
+ mutex_unlock(&acpi_scan_lock);
+}
+EXPORT_SYMBOL_GPL(acpi_scan_lock_release);
+
+int acpi_scan_add_handler(struct acpi_scan_handler *handler)
+{
+ if (!handler || !handler->attach)
+ return -EINVAL;
+
+ list_add_tail(&handler->list_node, &acpi_scan_handlers_list);
+ return 0;
+}
+
/*
* Creates hid/cid(s) string needed for modalias and uevent
* e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
*/
void acpi_bus_hot_remove_device(void *context)
{
- struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context;
+ struct acpi_eject_event *ej_event = context;
struct acpi_device *device = ej_event->device;
acpi_handle handle = device->handle;
acpi_handle temp;
acpi_status status = AE_OK;
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
+ mutex_lock(&acpi_scan_lock);
+
+ /* If there is no handle, the device node has been unregistered. */
+ if (!device->handle) {
+ dev_dbg(&device->dev, "ACPI handle missing\n");
+ put_device(&device->dev);
+ goto out;
+ }
+
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Hot-removing device %s...\n", dev_name(&device->dev)));
acpi_bus_trim(device);
- /* Device node has been released. */
+ /* Device node has been unregistered. */
+ put_device(&device->dev);
device = NULL;
- /* power off device */
- status = acpi_evaluate_object(handle, "_PS3", NULL, NULL);
- if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
- printk(KERN_WARNING PREFIX
- "Power-off device failed\n");
-
if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) {
arg_list.count = 1;
arg_list.pointer = &arg;
status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND)
- printk(KERN_WARNING PREFIX
- "Eject device failed\n");
- goto err_out;
- }
+ acpi_handle_warn(handle, "Eject failed\n");
- kfree(context);
- return;
+ /* Tell the firmware the hot-remove operation has failed. */
+ acpi_evaluate_hotplug_ost(handle, ej_event->event,
+ ost_code, NULL);
+ }
-err_out:
- /* Inform firmware the hot-remove operation has completed w/ error */
- (void) acpi_evaluate_hotplug_ost(handle,
- ej_event->event, ost_code, NULL);
+ out:
+ mutex_unlock(&acpi_scan_lock);
kfree(context);
return;
}
if ((!count) || (buf[0] != '1')) {
return -EINVAL;
}
-#ifndef FORCE_EJECT
- if (acpi_device->driver == NULL) {
+ if (!acpi_device->driver && !acpi_device->handler) {
ret = -ENODEV;
goto err;
}
-#endif
status = acpi_get_type(acpi_device->handle, &type);
if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) {
ret = -ENODEV;
goto err;
}
+ get_device(&acpi_device->dev);
ej_event->device = acpi_device;
if (acpi_device->flags.eject_pending) {
/* event originated from ACPI eject notification */
ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
}
- acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event);
+ status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event);
+ if (ACPI_FAILURE(status)) {
+ put_device(&acpi_device->dev);
+ kfree(ej_event);
+ }
err:
return ret;
}
const struct device *dev)
{
struct acpi_device *adev;
+ acpi_handle handle = ACPI_HANDLE(dev);
- if (!ids || !ACPI_HANDLE(dev)
- || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev)))
+ if (!ids || !handle || acpi_bus_get_device(handle, &adev))
return NULL;
return __acpi_match_device(adev, ids);
if (ret) {
if (acpi_drv->ops.remove)
acpi_drv->ops.remove(acpi_dev);
+ acpi_dev->driver = NULL;
+ acpi_dev->driver_data = NULL;
return ret;
}
}
device_del(&device->dev);
/*
- * Drop the reference counts of all power resources the device depends
- * on and turn off the ones that have no more references.
+ * Transition the device to D3cold to drop the reference counts of all
+ * power resources the device depends on and turn off the ones that have
+ * no more references.
*/
- acpi_power_transition(device, ACPI_STATE_D3_COLD);
+ acpi_device_set_power(device, ACPI_STATE_D3_COLD);
+ device->handle = NULL;
put_device(&device->dev);
}
-------------------------------------------------------------------------- */
static struct acpi_device *acpi_bus_get_parent(acpi_handle handle)
{
+ struct acpi_device *device = NULL;
acpi_status status;
- int ret;
- struct acpi_device *device;
/*
* Fixed hardware devices do not appear in the namespace and do not
* have handles, but we fabricate acpi_devices for them, so we have
* to deal with them specially.
*/
- if (handle == NULL)
+ if (!handle)
return acpi_root;
do {
status = acpi_get_parent(handle, &handle);
- if (status == AE_NULL_ENTRY)
- return NULL;
if (ACPI_FAILURE(status))
- return acpi_root;
-
- ret = acpi_bus_get_device(handle, &device);
- if (ret == 0)
- return device;
- } while (1);
+ return status == AE_NULL_ENTRY ? NULL : acpi_root;
+ } while (acpi_bus_get_device(handle, &device));
+ return device;
}
acpi_status
device->power.flags.power_resources)
device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1;
- acpi_bus_init_power(device);
+ if (acpi_bus_init_power(device)) {
+ acpi_free_power_resources_lists(device);
+ device->flags.power_manageable = 0;
+ }
}
static void acpi_bus_get_flags(struct acpi_device *device)
return AE_OK;
}
+static int acpi_scan_do_attach_handler(struct acpi_device *device, char *id)
+{
+ struct acpi_scan_handler *handler;
+
+ list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) {
+ const struct acpi_device_id *devid;
+
+ for (devid = handler->ids; devid->id[0]; devid++) {
+ int ret;
+
+ if (strcmp((char *)devid->id, id))
+ continue;
+
+ ret = handler->attach(device, devid);
+ if (ret > 0) {
+ device->handler = handler;
+ return ret;
+ } else if (ret < 0) {
+ return ret;
+ }
+ }
+ }
+ return 0;
+}
+
+static int acpi_scan_attach_handler(struct acpi_device *device)
+{
+ struct acpi_hardware_id *hwid;
+ int ret = 0;
+
+ list_for_each_entry(hwid, &device->pnp.ids, list) {
+ ret = acpi_scan_do_attach_handler(device, hwid->id);
+ if (ret)
+ break;
+
+ }
+ return ret;
+}
+
static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used,
void *not_used, void **ret_not_used)
{
- acpi_status status = AE_OK;
struct acpi_device *device;
unsigned long long sta_not_used;
- int type_not_used;
+ int ret;
/*
* Ignore errors ignored by acpi_bus_check_add() to avoid terminating
* namespace walks prematurely.
*/
- if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used))
+ if (acpi_bus_type_and_status(handle, &ret, &sta_not_used))
return AE_OK;
if (acpi_bus_get_device(handle, &device))
return AE_CTRL_DEPTH;
- if (!acpi_match_device_ids(device, acpi_platform_device_ids)) {
- /* This is a known good platform device. */
- acpi_create_platform_device(device);
- } else if (device_attach(&device->dev) < 0) {
- status = AE_CTRL_DEPTH;
- }
- return status;
+ ret = acpi_scan_attach_handler(device);
+ if (ret)
+ return ret > 0 ? AE_OK : AE_CTRL_DEPTH;
+
+ ret = device_attach(&device->dev);
+ return ret >= 0 ? AE_OK : AE_CTRL_DEPTH;
}
/**
* there has been a real error. There just have been no suitable ACPI objects
* in the table trunk from which the kernel could create a device and add an
* appropriate driver.
+ *
+ * Must be called under acpi_scan_lock.
*/
int acpi_bus_scan(acpi_handle handle)
{
void *device = NULL;
int error = 0;
- mutex_lock(&acpi_scan_lock);
-
if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device)))
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
acpi_bus_check_add, NULL, NULL, &device);
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
acpi_bus_device_attach, NULL, NULL, NULL);
- mutex_unlock(&acpi_scan_lock);
return error;
}
EXPORT_SYMBOL(acpi_bus_scan);
struct acpi_device *device = NULL;
if (!acpi_bus_get_device(handle, &device)) {
+ struct acpi_scan_handler *dev_handler = device->handler;
+
device->removal_type = ACPI_BUS_REMOVAL_EJECT;
- device_release_driver(&device->dev);
+ if (dev_handler) {
+ if (dev_handler->detach)
+ dev_handler->detach(device);
+
+ device->handler = NULL;
+ } else {
+ device_release_driver(&device->dev);
+ }
}
return AE_OK;
}
return AE_OK;
}
+/**
+ * acpi_bus_trim - Remove ACPI device node and all of its descendants
+ * @start: Root of the ACPI device nodes subtree to remove.
+ *
+ * Must be called under acpi_scan_lock.
+ */
void acpi_bus_trim(struct acpi_device *start)
{
- mutex_lock(&acpi_scan_lock);
-
/*
* Execute acpi_bus_device_detach() as a post-order callback to detach
* all ACPI drivers from the device nodes being removed.
acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL,
acpi_bus_remove, NULL, NULL);
acpi_bus_remove(start->handle, 0, NULL, NULL);
-
- mutex_unlock(&acpi_scan_lock);
}
EXPORT_SYMBOL_GPL(acpi_bus_trim);
}
acpi_pci_root_init();
+ acpi_pci_link_init();
+ acpi_platform_init();
+ acpi_csrt_init();
+ acpi_container_init();
+ mutex_lock(&acpi_scan_lock);
/*
* Enumerate devices in the ACPI namespace.
*/
result = acpi_bus_scan(ACPI_ROOT_OBJECT);
if (result)
- return result;
+ goto out;
result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root);
if (result)
- return result;
+ goto out;
result = acpi_bus_scan_fixed();
if (result) {
acpi_device_unregister(acpi_root);
- return result;
+ goto out;
}
acpi_update_all_gpes();
- return 0;
+
+ out:
+ mutex_unlock(&acpi_scan_lock);
+ return result;
}
projects / karo-tx-linux.git / blobdiff