#include <linux/module.h>
#include <linux/init.h>
+#include <linux/kernel.h>
#include <linux/acpi.h>
#include <acpi/acpi_drivers.h>
#define remove_sysfs_device_files(dev) \
setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_remove_file)
-#define to_acpi_device(n) container_of(n, struct acpi_device, kobj)
+#define to_acpi_dev(n) container_of(n, struct acpi_device, kobj)
#define to_handle_attr(n) container_of(n, struct acpi_device_attribute, attr);
static ssize_t acpi_device_attr_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
- struct acpi_device *device = to_acpi_device(kobj);
+ struct acpi_device *device = to_acpi_dev(kobj);
struct acpi_device_attribute *attribute = to_handle_attr(attr);
return attribute->show ? attribute->show(device, buf) : -EIO;
}
struct attribute *attr, const char *buf,
size_t len)
{
- struct acpi_device *device = to_acpi_device(kobj);
+ struct acpi_device *device = to_acpi_dev(kobj);
struct acpi_device_attribute *attribute = to_handle_attr(attr);
return attribute->store ? attribute->store(device, buf, len) : -EIO;
}
char **envp, int num_envp, char *buffer,
int buffer_size)
{
- struct acpi_device *dev = to_acpi_device(kobj);
+ struct acpi_device *dev = to_acpi_dev(kobj);
int i = 0;
int len = 0;
.uevent_ops = &namespace_uevent_ops,
};
-static void acpi_device_register(struct acpi_device *device,
- struct acpi_device *parent)
-{
- /*
- * Linkage
- * -------
- * Link this device to its parent and siblings.
- */
- INIT_LIST_HEAD(&device->children);
- INIT_LIST_HEAD(&device->node);
- INIT_LIST_HEAD(&device->g_list);
- INIT_LIST_HEAD(&device->wakeup_list);
-
- spin_lock(&acpi_device_lock);
- if (device->parent) {
- list_add_tail(&device->node, &device->parent->children);
- list_add_tail(&device->g_list, &device->parent->g_list);
- } else
- list_add_tail(&device->g_list, &acpi_device_list);
- if (device->wakeup.flags.valid)
- list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
- spin_unlock(&acpi_device_lock);
-
- strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN);
- if (parent)
- device->kobj.parent = &parent->kobj;
- device->kobj.ktype = &ktype_acpi_ns;
- device->kobj.kset = &acpi_namespace_kset;
- kobject_register(&device->kobj);
- create_sysfs_device_files(device);
-}
-
-static void acpi_device_unregister(struct acpi_device *device, int type)
-{
- spin_lock(&acpi_device_lock);
- if (device->parent) {
- list_del(&device->node);
- list_del(&device->g_list);
- } else
- list_del(&device->g_list);
-
- list_del(&device->wakeup_list);
-
- spin_unlock(&acpi_device_lock);
-
- acpi_detach_data(device->handle, acpi_bus_data_handler);
- remove_sysfs_device_files(device);
- kobject_unregister(&device->kobj);
-}
-
-void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context)
-{
- ACPI_FUNCTION_TRACE("acpi_bus_data_handler");
-
- /* TBD */
-
- return_VOID;
-}
-
-static int acpi_bus_get_power_flags(struct acpi_device *device)
-{
- acpi_status status = 0;
- acpi_handle handle = NULL;
- u32 i = 0;
-
- ACPI_FUNCTION_TRACE("acpi_bus_get_power_flags");
-
- /*
- * Power Management Flags
- */
- status = acpi_get_handle(device->handle, "_PSC", &handle);
- if (ACPI_SUCCESS(status))
- device->power.flags.explicit_get = 1;
- status = acpi_get_handle(device->handle, "_IRC", &handle);
- if (ACPI_SUCCESS(status))
- device->power.flags.inrush_current = 1;
-
- /*
- * Enumerate supported power management states
- */
- for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
- struct acpi_device_power_state *ps = &device->power.states[i];
- char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
-
- /* Evaluate "_PRx" to se if power resources are referenced */
- acpi_evaluate_reference(device->handle, object_name, NULL,
- &ps->resources);
- if (ps->resources.count) {
- device->power.flags.power_resources = 1;
- ps->flags.valid = 1;
- }
-
- /* Evaluate "_PSx" to see if we can do explicit sets */
- object_name[2] = 'S';
- status = acpi_get_handle(device->handle, object_name, &handle);
- if (ACPI_SUCCESS(status)) {
- ps->flags.explicit_set = 1;
- ps->flags.valid = 1;
- }
-
- /* State is valid if we have some power control */
- if (ps->resources.count || ps->flags.explicit_set)
- ps->flags.valid = 1;
-
- ps->power = -1; /* Unknown - driver assigned */
- ps->latency = -1; /* Unknown - driver assigned */
- }
-
- /* Set defaults for D0 and D3 states (always valid) */
- device->power.states[ACPI_STATE_D0].flags.valid = 1;
- device->power.states[ACPI_STATE_D0].power = 100;
- device->power.states[ACPI_STATE_D3].flags.valid = 1;
- device->power.states[ACPI_STATE_D3].power = 0;
-
- /* TBD: System wake support and resource requirements. */
-
- device->power.state = ACPI_STATE_UNKNOWN;
-
- return_VALUE(0);
-}
-
-int acpi_match_ids(struct acpi_device *device, char *ids)
-{
- if (device->flags.hardware_id)
- if (strstr(ids, device->pnp.hardware_id))
- return 0;
-
- 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))
- return 0;
- }
- }
- return -ENOENT;
-}
-
-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;
-
- end:
- if (ACPI_FAILURE(status))
- device->flags.wake_capable = 0;
- return_VALUE(0);
-}
-
/* --------------------------------------------------------------------------
ACPI sysfs device file support
-------------------------------------------------------------------------- */
}
/* --------------------------------------------------------------------------
- Performance Management
+ ACPI Bus operations
-------------------------------------------------------------------------- */
+static int acpi_device_suspend(struct device *dev, pm_message_t state)
+{
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ struct acpi_driver *acpi_drv = acpi_dev->driver;
-static int acpi_bus_get_perf_flags(struct acpi_device *device)
+ if (acpi_drv && acpi_drv->ops.suspend)
+ return acpi_drv->ops.suspend(acpi_dev, state);
+ return 0;
+}
+
+static int acpi_device_resume(struct device *dev)
{
- device->performance.state = ACPI_STATE_UNKNOWN;
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ struct acpi_driver *acpi_drv = acpi_dev->driver;
+
+ if (acpi_drv && acpi_drv->ops.resume)
+ return acpi_drv->ops.resume(acpi_dev);
return 0;
}
-/* --------------------------------------------------------------------------
- Driver Management
- -------------------------------------------------------------------------- */
+static int acpi_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ struct acpi_driver *acpi_drv = to_acpi_driver(drv);
-static LIST_HEAD(acpi_bus_drivers);
+ if (acpi_drv->ops.match)
+ return !acpi_drv->ops.match(acpi_dev, acpi_drv);
+ return !acpi_match_ids(acpi_dev, acpi_drv->ids);
+}
-/**
- * acpi_bus_match - match device IDs to driver's supported IDs
- * @device: the device that we are trying to match to a driver
- * @driver: driver whose device id table is being checked
- *
- * Checks the device's hardware (_HID) or compatible (_CID) ids to see if it
- * matches the specified driver's criteria.
- */
-static int
-acpi_bus_match(struct acpi_device *device, struct acpi_driver *driver)
+static int acpi_device_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
{
- if (driver && driver->ops.match)
- return driver->ops.match(device, driver);
- return acpi_match_ids(device, driver->ids);
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ int i = 0, length = 0, ret = 0;
+
+ if (acpi_dev->flags.hardware_id)
+ ret = add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "HWID=%s", acpi_dev->pnp.hardware_id);
+ if (ret)
+ return -ENOMEM;
+ if (acpi_dev->flags.compatible_ids) {
+ int j;
+ struct acpi_compatible_id_list *cid_list;
+
+ cid_list = acpi_dev->pnp.cid_list;
+
+ for (j = 0; j < cid_list->count; j++) {
+ ret = add_uevent_var(envp, num_envp, &i, buffer,
+ buffer_size, &length, "COMPTID=%s",
+ cid_list->id[j].value);
+ if (ret)
+ return -ENOMEM;
+ }
+ }
+
+ envp[i] = NULL;
+ return 0;
}
+static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
+static int acpi_start_single_object(struct acpi_device *);
+static int acpi_device_probe(struct device * dev)
+{
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver);
+ int ret;
+
+ ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
+ if (!ret) {
+ acpi_start_single_object(acpi_dev);
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Found driver [%s] for device [%s]\n",
+ acpi_drv->name, acpi_dev->pnp.bus_id));
+ get_device(dev);
+ }
+ return ret;
+}
+
+static int acpi_device_remove(struct device * dev)
+{
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ struct acpi_driver *acpi_drv = acpi_dev->driver;
+
+ if (acpi_drv) {
+ if (acpi_drv->ops.stop)
+ acpi_drv->ops.stop(acpi_dev, ACPI_BUS_REMOVAL_NORMAL);
+ if (acpi_drv->ops.remove)
+ acpi_drv->ops.remove(acpi_dev, ACPI_BUS_REMOVAL_NORMAL);
+ }
+ acpi_dev->driver = NULL;
+ acpi_driver_data(dev) = NULL;
+
+ put_device(dev);
+ return 0;
+}
+
+static void acpi_device_shutdown(struct device *dev)
+{
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ struct acpi_driver *acpi_drv = acpi_dev->driver;
+
+ if (acpi_drv && acpi_drv->ops.shutdown)
+ acpi_drv->ops.shutdown(acpi_dev);
+
+ return ;
+}
+
+static struct bus_type acpi_bus_type = {
+ .name = "acpi",
+ .suspend = acpi_device_suspend,
+ .resume = acpi_device_resume,
+ .shutdown = acpi_device_shutdown,
+ .match = acpi_bus_match,
+ .probe = acpi_device_probe,
+ .remove = acpi_device_remove,
+ .uevent = acpi_device_uevent,
+};
+
+static void acpi_device_register(struct acpi_device *device,
+ struct acpi_device *parent)
+{
+ int err;
+
+ /*
+ * Linkage
+ * -------
+ * Link this device to its parent and siblings.
+ */
+ INIT_LIST_HEAD(&device->children);
+ INIT_LIST_HEAD(&device->node);
+ INIT_LIST_HEAD(&device->g_list);
+ INIT_LIST_HEAD(&device->wakeup_list);
+
+ spin_lock(&acpi_device_lock);
+ if (device->parent) {
+ list_add_tail(&device->node, &device->parent->children);
+ list_add_tail(&device->g_list, &device->parent->g_list);
+ } else
+ list_add_tail(&device->g_list, &acpi_device_list);
+ if (device->wakeup.flags.valid)
+ list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list);
+ spin_unlock(&acpi_device_lock);
+
+ strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN);
+ if (parent)
+ device->kobj.parent = &parent->kobj;
+ device->kobj.ktype = &ktype_acpi_ns;
+ device->kobj.kset = &acpi_namespace_kset;
+ err = kobject_register(&device->kobj);
+ if (err < 0)
+ printk(KERN_WARNING "%s: kobject_register error: %d\n",
+ __FUNCTION__, err);
+ create_sysfs_device_files(device);
+}
+
+static void acpi_device_unregister(struct acpi_device *device, int type)
+{
+ spin_lock(&acpi_device_lock);
+ if (device->parent) {
+ list_del(&device->node);
+ list_del(&device->g_list);
+ } else
+ list_del(&device->g_list);
+
+ list_del(&device->wakeup_list);
+
+ spin_unlock(&acpi_device_lock);
+
+ acpi_detach_data(device->handle, acpi_bus_data_handler);
+ remove_sysfs_device_files(device);
+ kobject_unregister(&device->kobj);
+}
+
+/* --------------------------------------------------------------------------
+ Driver Management
+ -------------------------------------------------------------------------- */
+static LIST_HEAD(acpi_bus_drivers);
+
/**
* acpi_bus_driver_init - add a device to a driver
* @device: the device to add and initialize
{
int result = 0;
- ACPI_FUNCTION_TRACE("acpi_bus_driver_init");
if (!device || !driver)
- return_VALUE(-EINVAL);
+ return -EINVAL;
if (!driver->ops.add)
- return_VALUE(-ENOSYS);
+ return -ENOSYS;
result = driver->ops.add(device);
if (result) {
device->driver = NULL;
acpi_driver_data(device) = NULL;
- return_VALUE(result);
+ return result;
}
device->driver = driver;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Driver successfully bound to device\n"));
- return_VALUE(0);
+ return 0;
}
static int acpi_start_single_object(struct acpi_device *device)
int result = 0;
struct acpi_driver *driver;
- ACPI_FUNCTION_TRACE("acpi_start_single_object");
if (!(driver = device->driver))
- return_VALUE(0);
+ return 0;
if (driver->ops.start) {
result = driver->ops.start(device);
driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
}
- return_VALUE(result);
+ return result;
}
static void acpi_driver_attach(struct acpi_driver *drv)
{
struct list_head *node, *next;
- ACPI_FUNCTION_TRACE("acpi_driver_attach");
spin_lock(&acpi_device_lock);
list_for_each_safe(node, next, &acpi_device_list) {
continue;
spin_unlock(&acpi_device_lock);
- if (!acpi_bus_match(dev, drv)) {
+ if (!acpi_bus_match(&(dev->dev), &(drv->drv))) {
if (!acpi_bus_driver_init(dev, drv)) {
acpi_start_single_object(dev);
atomic_inc(&drv->references);
{
struct list_head *node, *next;
- ACPI_FUNCTION_TRACE("acpi_driver_detach");
spin_lock(&acpi_device_lock);
list_for_each_safe(node, next, &acpi_device_list) {
*/
int acpi_bus_register_driver(struct acpi_driver *driver)
{
- ACPI_FUNCTION_TRACE("acpi_bus_register_driver");
if (acpi_disabled)
- return_VALUE(-ENODEV);
+ return -ENODEV;
spin_lock(&acpi_device_lock);
list_add_tail(&driver->node, &acpi_bus_drivers);
spin_unlock(&acpi_device_lock);
acpi_driver_attach(driver);
- return_VALUE(0);
+ return 0;
}
EXPORT_SYMBOL(acpi_bus_register_driver);
int result = 0;
struct list_head *node, *next;
- ACPI_FUNCTION_TRACE("acpi_bus_find_driver");
spin_lock(&acpi_device_lock);
list_for_each_safe(node, next, &acpi_bus_drivers) {
atomic_inc(&driver->references);
spin_unlock(&acpi_device_lock);
- if (!acpi_bus_match(device, driver)) {
+ if (!acpi_bus_match(&(device->dev), &(driver->drv))) {
result = acpi_bus_driver_init(device, driver);
if (!result)
goto Done;
spin_unlock(&acpi_device_lock);
Done:
- return_VALUE(result);
+ return result;
}
/* --------------------------------------------------------------------------
Device Enumeration
-------------------------------------------------------------------------- */
+acpi_status
+acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd)
+{
+ acpi_status status;
+ acpi_handle tmp;
+ struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *obj;
+
+ status = acpi_get_handle(handle, "_EJD", &tmp);
+ if (ACPI_FAILURE(status))
+ return status;
+
+ status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer);
+ if (ACPI_SUCCESS(status)) {
+ obj = buffer.pointer;
+ status = acpi_get_handle(NULL, obj->string.pointer, ejd);
+ kfree(buffer.pointer);
+ }
+ return status;
+}
+EXPORT_SYMBOL_GPL(acpi_bus_get_ejd);
+
+void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context)
+{
+
+ /* TBD */
+
+ return;
+}
+
+int acpi_match_ids(struct acpi_device *device, char *ids)
+{
+ if (device->flags.hardware_id)
+ if (strstr(ids, device->pnp.hardware_id))
+ return 0;
+
+ 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))
+ return 0;
+ }
+ }
+ return -ENOENT;
+}
+
+static int acpi_bus_get_perf_flags(struct acpi_device *device)
+{
+ device->performance.state = ACPI_STATE_UNKNOWN;
+ return 0;
+}
+
+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;
+
+
+ /* _PRW */
+ status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
+ goto end;
+ }
+
+ package = (union acpi_object *)buffer.pointer;
+ status = acpi_bus_extract_wakeup_device_power_package(device, package);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
+ goto end;
+ }
+
+ kfree(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;
+
+ end:
+ if (ACPI_FAILURE(status))
+ device->flags.wake_capable = 0;
+ return 0;
+}
+
+static int acpi_bus_get_power_flags(struct acpi_device *device)
+{
+ acpi_status status = 0;
+ acpi_handle handle = NULL;
+ u32 i = 0;
+
+
+ /*
+ * Power Management Flags
+ */
+ status = acpi_get_handle(device->handle, "_PSC", &handle);
+ if (ACPI_SUCCESS(status))
+ device->power.flags.explicit_get = 1;
+ status = acpi_get_handle(device->handle, "_IRC", &handle);
+ if (ACPI_SUCCESS(status))
+ device->power.flags.inrush_current = 1;
+
+ /*
+ * Enumerate supported power management states
+ */
+ for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
+ struct acpi_device_power_state *ps = &device->power.states[i];
+ char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
+
+ /* Evaluate "_PRx" to se if power resources are referenced */
+ acpi_evaluate_reference(device->handle, object_name, NULL,
+ &ps->resources);
+ if (ps->resources.count) {
+ device->power.flags.power_resources = 1;
+ ps->flags.valid = 1;
+ }
+
+ /* Evaluate "_PSx" to see if we can do explicit sets */
+ object_name[2] = 'S';
+ status = acpi_get_handle(device->handle, object_name, &handle);
+ if (ACPI_SUCCESS(status)) {
+ ps->flags.explicit_set = 1;
+ ps->flags.valid = 1;
+ }
+
+ /* State is valid if we have some power control */
+ if (ps->resources.count || ps->flags.explicit_set)
+ ps->flags.valid = 1;
+
+ ps->power = -1; /* Unknown - driver assigned */
+ ps->latency = -1; /* Unknown - driver assigned */
+ }
+
+ /* Set defaults for D0 and D3 states (always valid) */
+ device->power.states[ACPI_STATE_D0].flags.valid = 1;
+ device->power.states[ACPI_STATE_D0].power = 100;
+ device->power.states[ACPI_STATE_D3].flags.valid = 1;
+ device->power.states[ACPI_STATE_D3].power = 0;
+
+ /* TBD: System wake support and resource requirements. */
+
+ device->power.state = ACPI_STATE_UNKNOWN;
+
+ return 0;
+}
static int acpi_bus_get_flags(struct acpi_device *device)
{
acpi_status status = AE_OK;
acpi_handle temp = NULL;
- ACPI_FUNCTION_TRACE("acpi_bus_get_flags");
/* Presence of _STA indicates 'dynamic_status' */
status = acpi_get_handle(device->handle, "_STA", &temp);
/* TBD: Peformance management */
- return_VALUE(0);
+ return 0;
}
static void acpi_device_get_busid(struct acpi_device *device,
printk(KERN_ERR "Memory allocation error\n");
}
- acpi_os_free(buffer.pointer);
+ kfree(buffer.pointer);
}
static int acpi_device_set_context(struct acpi_device *device, int type)
int result = 0;
struct acpi_driver *driver;
- ACPI_FUNCTION_TRACE("acpi_bus_remove");
if (!dev)
- return_VALUE(-EINVAL);
+ return -EINVAL;
driver = dev->driver;
if (driver->ops.stop) {
result = driver->ops.stop(dev, ACPI_BUS_REMOVAL_EJECT);
if (result)
- return_VALUE(result);
+ return result;
}
result = dev->driver->ops.remove(dev, ACPI_BUS_REMOVAL_EJECT);
if (result) {
- return_VALUE(result);
+ return result;
}
atomic_dec(&dev->driver->references);
}
if (!rmdevice)
- return_VALUE(0);
+ return 0;
if (dev->flags.bus_address) {
if ((dev->parent) && (dev->parent->ops.unbind))
acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
- return_VALUE(0);
+ return 0;
}
static int
int result = 0;
struct acpi_device *device = NULL;
- ACPI_FUNCTION_TRACE("acpi_add_single_object");
if (!child)
- return_VALUE(-EINVAL);
+ return -EINVAL;
device = kmalloc(sizeof(struct acpi_device), GFP_KERNEL);
if (!device) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Memory allocation error\n"));
- return_VALUE(-ENOMEM);
+ printk(KERN_ERR PREFIX "Memory allocation error\n");
+ return -ENOMEM;
}
memset(device, 0, sizeof(struct acpi_device));
kfree(device);
}
- return_VALUE(result);
+ return result;
}
static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops)
acpi_object_type type = 0;
u32 level = 1;
- ACPI_FUNCTION_TRACE("acpi_bus_scan");
if (!start)
- return_VALUE(-EINVAL);
+ return -EINVAL;
parent = start;
phandle = start->handle;
}
}
- return_VALUE(0);
+ return 0;
}
int
int result;
struct acpi_bus_ops ops;
- ACPI_FUNCTION_TRACE("acpi_bus_add");
result = acpi_add_single_object(child, parent, handle, type);
if (!result) {
ops.acpi_op_add = 1;
result = acpi_bus_scan(*child, &ops);
}
- return_VALUE(result);
+ return result;
}
EXPORT_SYMBOL(acpi_bus_add);
int result;
struct acpi_bus_ops ops;
- ACPI_FUNCTION_TRACE("acpi_bus_start");
if (!device)
- return_VALUE(-EINVAL);
+ return -EINVAL;
result = acpi_start_single_object(device);
if (!result) {
ops.acpi_op_start = 1;
result = acpi_bus_scan(device, &ops);
}
- return_VALUE(result);
+ return result;
}
EXPORT_SYMBOL(acpi_bus_start);
int result = 0;
struct acpi_device *device = NULL;
- ACPI_FUNCTION_TRACE("acpi_bus_scan_fixed");
if (!root)
- return_VALUE(-ENODEV);
+ return -ENODEV;
/*
* Enumerate all fixed-feature devices.
result = acpi_start_single_object(device);
}
- return_VALUE(result);
-}
-
-
-static inline struct acpi_device * to_acpi_dev(struct device * dev)
-{
- return container_of(dev, struct acpi_device, dev);
-}
-
-
-static int root_suspend(struct acpi_device * acpi_dev, pm_message_t state)
-{
- struct acpi_device * dev, * next;
- int result;
-
- spin_lock(&acpi_device_lock);
- list_for_each_entry_safe_reverse(dev, next, &acpi_device_list, g_list) {
- if (dev->driver && dev->driver->ops.suspend) {
- spin_unlock(&acpi_device_lock);
- result = dev->driver->ops.suspend(dev, 0);
- if (result) {
- printk(KERN_ERR PREFIX "[%s - %s] Suspend failed: %d\n",
- acpi_device_name(dev),
- acpi_device_bid(dev), result);
- }
- spin_lock(&acpi_device_lock);
- }
- }
- spin_unlock(&acpi_device_lock);
- return 0;
-}
-
-
-static int acpi_device_suspend(struct device * dev, pm_message_t state)
-{
- struct acpi_device * acpi_dev = to_acpi_dev(dev);
-
- /*
- * For now, we should only register 1 generic device -
- * the ACPI root device - and from there, we walk the
- * tree of ACPI devices to suspend each one using the
- * ACPI driver methods.
- */
- if (acpi_dev->handle == ACPI_ROOT_OBJECT)
- root_suspend(acpi_dev, state);
- return 0;
-}
-
-
-
-static int root_resume(struct acpi_device * acpi_dev)
-{
- struct acpi_device * dev, * next;
- int result;
-
- spin_lock(&acpi_device_lock);
- list_for_each_entry_safe(dev, next, &acpi_device_list, g_list) {
- if (dev->driver && dev->driver->ops.resume) {
- spin_unlock(&acpi_device_lock);
- result = dev->driver->ops.resume(dev, 0);
- if (result) {
- printk(KERN_ERR PREFIX "[%s - %s] resume failed: %d\n",
- acpi_device_name(dev),
- acpi_device_bid(dev), result);
- }
- spin_lock(&acpi_device_lock);
- }
- }
- spin_unlock(&acpi_device_lock);
- return 0;
-}
-
-
-static int acpi_device_resume(struct device * dev)
-{
- struct acpi_device * acpi_dev = to_acpi_dev(dev);
-
- /*
- * For now, we should only register 1 generic device -
- * the ACPI root device - and from there, we walk the
- * tree of ACPI devices to resume each one using the
- * ACPI driver methods.
- */
- if (acpi_dev->handle == ACPI_ROOT_OBJECT)
- root_resume(acpi_dev);
- return 0;
+ return result;
}
-
-struct bus_type acpi_bus_type = {
- .name = "acpi",
- .suspend = acpi_device_suspend,
- .resume = acpi_device_resume,
-};
-
-
-
static int __init acpi_scan_init(void)
{
int result;
struct acpi_bus_ops ops;
- ACPI_FUNCTION_TRACE("acpi_scan_init");
if (acpi_disabled)
- return_VALUE(0);
+ return 0;
- kset_register(&acpi_namespace_kset);
+ result = kset_register(&acpi_namespace_kset);
+ if (result < 0)
+ printk(KERN_ERR PREFIX "kset_register error: %d\n", result);
result = bus_register(&acpi_bus_type);
if (result) {
acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
Done:
- return_VALUE(result);
+ return result;
}
subsys_initcall(acpi_scan_init);
projects / powerpc.git / blobdiff