#define ACPI_BUS_DEVICE_NAME "System Bus"
static LIST_HEAD(acpi_device_list);
-static spinlock_t acpi_device_lock = SPIN_LOCK_UNLOCKED;
+spinlock_t acpi_device_lock = SPIN_LOCK_UNLOCKED;
+LIST_HEAD(acpi_wakeup_device_list);
static void acpi_device_release(struct kobject * kobj)
{
status = acpi_get_handle(device->handle, "_IRC", &handle);
if (ACPI_SUCCESS(status))
device->power.flags.inrush_current = 1;
- status = acpi_get_handle(device->handle, "_PRW", &handle);
- if (ACPI_SUCCESS(status))
- device->power.flags.wake_capable = 1;
/*
* Enumerate supported power management states
return 0;
}
+static int
+acpi_match_ids (
+ struct acpi_device *device,
+ char *ids)
+{
+ int error = 0;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+
+ if (device->flags.hardware_id)
+ if (strstr(ids, device->pnp.hardware_id))
+ goto Done;
+
+ if (device->flags.compatible_ids) {
+ struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
+ int i;
+
+ /* compare multiple _CID entries against driver ids */
+ for (i = 0; i < cid_list->count; i++)
+ {
+ if (strstr(ids, cid_list->id[i].value))
+ goto Done;
+ }
+ }
+ error = -ENOENT;
+
+ Done:
+ if (buffer.pointer)
+ acpi_os_free(buffer.pointer);
+ return error;
+}
+
+static acpi_status
+acpi_bus_extract_wakeup_device_power_package (
+ struct acpi_device *device,
+ union acpi_object *package)
+{
+ int i = 0;
+ union acpi_object *element = NULL;
+
+ if (!device || !package || (package->package.count < 2))
+ return AE_BAD_PARAMETER;
+
+ element = &(package->package.elements[0]);
+ if (!element)
+ return AE_BAD_PARAMETER;
+ if (element->type == ACPI_TYPE_PACKAGE) {
+ if ((element->package.count < 2) ||
+ (element->package.elements[0].type != ACPI_TYPE_LOCAL_REFERENCE) ||
+ (element->package.elements[1].type != ACPI_TYPE_INTEGER))
+ return AE_BAD_DATA;
+ device->wakeup.gpe_device = element->package.elements[0].reference.handle;
+ device->wakeup.gpe_number = (u32)element->package.elements[1].integer.value;
+ }else if (element->type == ACPI_TYPE_INTEGER) {
+ device->wakeup.gpe_number = element->integer.value;
+ }else
+ return AE_BAD_DATA;
+
+ element = &(package->package.elements[1]);
+ if (element->type != ACPI_TYPE_INTEGER) {
+ return AE_BAD_DATA;
+ }
+ device->wakeup.sleep_state = element->integer.value;
+
+ if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
+ return AE_NO_MEMORY;
+ }
+ device->wakeup.resources.count = package->package.count - 2;
+ for (i=0; i < device->wakeup.resources.count; i++) {
+ element = &(package->package.elements[i + 2]);
+ if (element->type != ACPI_TYPE_ANY ) {
+ return AE_BAD_DATA;
+ }
+
+ device->wakeup.resources.handles[i] = element->reference.handle;
+ }
+
+ return AE_OK;
+}
+
+static int
+acpi_bus_get_wakeup_device_flags (
+ struct acpi_device *device)
+{
+ acpi_status status = 0;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *package = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_get_wakeup_flags");
+
+ /* _PRW */
+ status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _PRW\n"));
+ goto end;
+ }
+
+ package = (union acpi_object *) buffer.pointer;
+ status = acpi_bus_extract_wakeup_device_power_package(device, package);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _PRW package\n"));
+ goto end;
+ }
+
+ acpi_os_free(buffer.pointer);
+
+ device->wakeup.flags.valid = 1;
+ /* Power button, Lid switch always enable wakeup*/
+ if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E"))
+ device->wakeup.flags.run_wake = 1;
+
+ /* TBD: lock */
+ INIT_LIST_HEAD(&device->wakeup_list);
+ spin_lock(&acpi_device_lock);
+ list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
+ spin_unlock(&acpi_device_lock);
+
+end:
+ if (ACPI_FAILURE(status))
+ device->flags.wake_capable = 0;
+ return 0;
+}
/* --------------------------------------------------------------------------
Performance Management
struct acpi_device *device,
struct acpi_driver *driver)
{
- int error = 0;
- struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
-
- if (device->flags.hardware_id)
- if (strstr(driver->ids, device->pnp.hardware_id))
- goto Done;
-
- if (device->flags.compatible_ids) {
- struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
- int i;
-
- /* compare multiple _CID entries against driver ids */
- for (i = 0; i < cid_list->count; i++)
- {
- if (strstr(driver->ids, cid_list->id[i].value))
- goto Done;
- }
- }
- error = -ENOENT;
-
- Done:
- if (buffer.pointer)
- acpi_os_free(buffer.pointer);
- return error;
+ return acpi_match_ids(device, driver->ids);
}
static int acpi_driver_attach(struct acpi_driver * drv)
{
struct list_head * node, * next;
+ int count = 0;
ACPI_FUNCTION_TRACE("acpi_driver_attach");
if (!acpi_bus_match(dev, drv)) {
if (!acpi_bus_driver_init(dev, drv)) {
atomic_inc(&drv->references);
+ count++;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
drv->name, dev->pnp.bus_id));
}
spin_lock(&acpi_device_lock);
}
spin_unlock(&acpi_device_lock);
- return_VALUE(0);
+ return_VALUE(count);
}
static int acpi_driver_detach(struct acpi_driver * drv)
* acpi_bus_register_driver
* ------------------------
* Registers a driver with the ACPI bus. Searches the namespace for all
- * devices that match the driver's criteria and binds.
+ * devices that match the driver's criteria and binds. Returns the
+ * number of devices that were claimed by the driver, or a negative
+ * error status for failure.
*/
int
acpi_bus_register_driver (
struct acpi_driver *driver)
{
- int error = 0;
+ int count;
ACPI_FUNCTION_TRACE("acpi_bus_register_driver");
if (acpi_disabled)
return_VALUE(-ENODEV);
- if (driver) {
- spin_lock(&acpi_device_lock);
- list_add_tail(&driver->node, &acpi_bus_drivers);
- spin_unlock(&acpi_device_lock);
- acpi_driver_attach(driver);
- } else
- error = -EINVAL;
+ if (!driver)
+ return_VALUE(-EINVAL);
- return_VALUE(error);
+ spin_lock(&acpi_device_lock);
+ list_add_tail(&driver->node, &acpi_bus_drivers);
+ spin_unlock(&acpi_device_lock);
+ count = acpi_driver_attach(driver);
+
+ return_VALUE(count);
}
if (ACPI_SUCCESS(status))
device->flags.power_manageable = 1;
+ /* Presence of _PRW indicates wake capable */
+ status = acpi_get_handle(device->handle, "_PRW", &temp);
+ if (ACPI_SUCCESS(status))
+ device->flags.wake_capable = 1;
+
/* TBD: Peformance management */
return_VALUE(0);
goto end;
}
+ /*
+ * Wakeup device management
+ *-----------------------
+ */
+ if (device->flags.wake_capable) {
+ result = acpi_bus_get_wakeup_device_flags(device);
+ if (result)
+ goto end;
+ }
+
/*
* Performance Management
* ----------------------
git://git.onelab.eu / linux-2.6.git / blobdiff