#include <linux/module.h>
#include <linux/init.h>
+#include <linux/kernel.h>
#include <linux/acpi.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */
-
#define _COMPONENT ACPI_BUS_COMPONENT
-ACPI_MODULE_NAME ("scan")
-
+ACPI_MODULE_NAME("scan")
#define STRUCT_TO_INT(s) (*((int*)&s))
-
-extern struct acpi_device *acpi_root;
-
+extern struct acpi_device *acpi_root;
#define ACPI_BUS_CLASS "system_bus"
#define ACPI_BUS_HID "ACPI_BUS"
DEFINE_SPINLOCK(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
-static int
-acpi_bus_trim(struct acpi_device *start,
- int rmdevice);
-static void acpi_device_release(struct kobject * kobj)
+static void acpi_device_release(struct kobject *kobj)
{
- struct acpi_device * dev = container_of(kobj,struct acpi_device,kobj);
- if (dev->pnp.cid_list)
- kfree(dev->pnp.cid_list);
+ struct acpi_device *dev = container_of(kobj, struct acpi_device, kobj);
+ kfree(dev->pnp.cid_list);
kfree(dev);
}
struct acpi_device_attribute {
struct attribute attr;
- ssize_t (*show)(struct acpi_device *, char *);
- ssize_t (*store)(struct acpi_device *, const char *, size_t);
+ ssize_t(*show) (struct acpi_device *, char *);
+ ssize_t(*store) (struct acpi_device *, const char *, size_t);
};
typedef void acpi_device_sysfs_files(struct kobject *,
- const struct attribute *);
+ const struct attribute *);
static void setup_sys_fs_device_files(struct acpi_device *dev,
- acpi_device_sysfs_files *func);
+ acpi_device_sysfs_files * func);
#define create_sysfs_device_files(dev) \
setup_sys_fs_device_files(dev, (acpi_device_sysfs_files *)&sysfs_create_file)
#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_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 attribute *attr, char *buf)
{
struct acpi_device *device = to_acpi_device(kobj);
struct acpi_device_attribute *attribute = to_handle_attr(attr);
- return attribute->show ? attribute->show(device, buf) : 0;
+ return attribute->show ? attribute->show(device, buf) : -EIO;
}
static ssize_t acpi_device_attr_store(struct kobject *kobj,
- struct attribute *attr, const char *buf, size_t len)
+ struct attribute *attr, const char *buf,
+ size_t len)
{
struct acpi_device *device = to_acpi_device(kobj);
struct acpi_device_attribute *attribute = to_handle_attr(attr);
- return attribute->store ? attribute->store(device, buf, len) : len;
+ return attribute->store ? attribute->store(device, buf, len) : -EIO;
}
static struct sysfs_ops acpi_device_sysfs_ops = {
- .show = acpi_device_attr_show,
- .store = acpi_device_attr_store,
+ .show = acpi_device_attr_show,
+ .store = acpi_device_attr_store,
};
static struct kobj_type ktype_acpi_ns = {
- .sysfs_ops = &acpi_device_sysfs_ops,
- .release = acpi_device_release,
+ .sysfs_ops = &acpi_device_sysfs_ops,
+ .release = acpi_device_release,
};
-static int namespace_hotplug(struct kset *kset, struct kobject *kobj,
+static int namespace_uevent(struct kset *kset, struct kobject *kobj,
char **envp, int num_envp, char *buffer,
int buffer_size)
{
if (!dev->driver)
return 0;
- if (add_hotplug_env_var(envp, num_envp, &i, buffer, buffer_size, &len,
- "PHYSDEVDRIVER=%s", dev->driver->name))
+ if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
+ "PHYSDEVDRIVER=%s", dev->driver->name))
return -ENOMEM;
envp[i] = NULL;
return 0;
}
-static struct kset_hotplug_ops namespace_hotplug_ops = {
- .hotplug = &namespace_hotplug,
+static struct kset_uevent_ops namespace_uevent_ops = {
+ .uevent = &namespace_uevent,
};
static struct kset acpi_namespace_kset = {
- .kobj = {
- .name = "namespace",
- },
+ .kobj = {
+ .name = "namespace",
+ },
.subsys = &acpi_subsys,
- .ktype = &ktype_acpi_ns,
- .hotplug_ops = &namespace_hotplug_ops,
+ .ktype = &ktype_acpi_ns,
+ .uevent_ops = &namespace_uevent_ops,
};
-
-static void acpi_device_register(struct acpi_device * device, struct acpi_device * parent)
+static void acpi_device_register(struct acpi_device *device,
+ struct acpi_device *parent)
{
+ int err;
+
/*
* Linkage
* -------
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);
+ list_add_tail(&device->g_list, &device->parent->g_list);
} else
- list_add_tail(&device->g_list,&acpi_device_list);
+ list_add_tail(&device->g_list, &acpi_device_list);
if (device->wakeup.flags.valid)
- list_add_tail(&device->wakeup_list,&acpi_wakeup_device_list);
+ 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);
+ 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);
+ 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 int
-acpi_device_unregister (
- struct acpi_device *device,
- int type)
+static void acpi_device_unregister(struct acpi_device *device, int type)
{
spin_lock(&acpi_device_lock);
if (device->parent) {
acpi_detach_data(device->handle, acpi_bus_data_handler);
remove_sysfs_device_files(device);
kobject_unregister(&device->kobj);
- return 0;
}
-void
-acpi_bus_data_handler (
- acpi_handle handle,
- u32 function,
- void *context)
+void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context)
{
- ACPI_FUNCTION_TRACE("acpi_bus_data_handler");
/* TBD */
- return_VOID;
+ return;
}
-static int
-acpi_bus_get_power_flags (
- struct acpi_device *device)
+static int acpi_bus_get_power_flags(struct acpi_device *device)
{
- acpi_status status = 0;
- acpi_handle handle = NULL;
- u32 i = 0;
+ acpi_status status = 0;
+ acpi_handle handle = NULL;
+ u32 i = 0;
- ACPI_FUNCTION_TRACE("acpi_bus_get_power_flags");
/*
* Power Management Flags
*/
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'};
+ 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);
+ &ps->resources);
if (ps->resources.count) {
device->power.flags.power_resources = 1;
ps->flags.valid = 1;
if (ps->resources.count || ps->flags.explicit_set)
ps->flags.valid = 1;
- ps->power = -1; /* Unknown - driver assigned */
+ ps->power = -1; /* Unknown - driver assigned */
ps->latency = -1; /* Unknown - driver assigned */
}
device->power.state = ACPI_STATE_UNKNOWN;
- return_VALUE(0);
+ return 0;
}
-int
-acpi_match_ids (
- struct acpi_device *device,
- char *ids)
+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;
+ 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++)
- {
+ for (i = 0; i < cid_list->count; i++) {
if (strstr(ids, cid_list->id[i].value))
- goto Done;
+ return 0;
}
}
- error = -ENOENT;
-
- Done:
- if (buffer.pointer)
- acpi_os_free(buffer.pointer);
- return error;
+ return -ENOENT;
}
static acpi_status
-acpi_bus_extract_wakeup_device_power_package (
- struct acpi_device *device,
- union acpi_object *package)
+acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
+ union acpi_object *package)
{
- int i = 0;
- union acpi_object *element = NULL;
+ int i = 0;
+ union acpi_object *element = NULL;
if (!device || !package || (package->package.count < 2))
return AE_BAD_PARAMETER;
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))
+ (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_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
+ } else
return AE_BAD_DATA;
element = &(package->package.elements[1]);
return AE_NO_MEMORY;
}
device->wakeup.resources.count = package->package.count - 2;
- for (i=0; i < device->wakeup.resources.count; i++) {
+ for (i = 0; i < device->wakeup.resources.count; i++) {
element = &(package->package.elements[i + 2]);
- if (element->type != ACPI_TYPE_ANY ) {
+ if (element->type != ACPI_TYPE_ANY) {
return AE_BAD_DATA;
}
return AE_OK;
}
-static int
-acpi_bus_get_wakeup_device_flags (
- struct acpi_device *device)
+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_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"));
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
goto end;
}
- package = (union acpi_object *) buffer.pointer;
+ 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"));
+ ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
goto end;
}
- acpi_os_free(buffer.pointer);
+ kfree(buffer.pointer);
device->wakeup.flags.valid = 1;
- /* Power button, Lid switch always enable wakeup*/
+ /* Power button, Lid switch always enable wakeup */
if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E"))
device->wakeup.flags.run_wake = 1;
-end:
+ end:
if (ACPI_FAILURE(status))
device->flags.wake_capable = 0;
- return_VALUE(0);
+ return 0;
}
/* --------------------------------------------------------------------------
- ACPI hotplug sysfs device file support
+ ACPI sysfs device file support
-------------------------------------------------------------------------- */
-static ssize_t acpi_eject_store(struct acpi_device *device,
- const char *buf, size_t count);
+static ssize_t acpi_eject_store(struct acpi_device *device,
+ const char *buf, size_t count);
#define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \
static struct acpi_device_attribute acpi_device_attr_##_name = \
* @func: function pointer to create or destroy the device file
*/
static void
-setup_sys_fs_device_files (
- struct acpi_device *dev,
- acpi_device_sysfs_files *func)
+setup_sys_fs_device_files(struct acpi_device *dev,
+ acpi_device_sysfs_files * func)
{
- acpi_status status;
- acpi_handle temp = NULL;
+ acpi_status status;
+ acpi_handle temp = NULL;
/*
* If device has _EJ0, 'eject' file is created that is used to trigger
*/
status = acpi_get_handle(dev->handle, "_EJ0", &temp);
if (ACPI_SUCCESS(status))
- (*(func))(&dev->kobj,&acpi_device_attr_eject.attr);
+ (*(func)) (&dev->kobj, &acpi_device_attr_eject.attr);
}
-static int
-acpi_eject_operation(acpi_handle handle, int lockable)
+static int acpi_eject_operation(acpi_handle handle, int lockable)
{
struct acpi_object_list arg_list;
union acpi_object arg;
status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
if (ACPI_FAILURE(status)) {
- return(-ENODEV);
+ return (-ENODEV);
}
- return(0);
+ return (0);
}
-
static ssize_t
acpi_eject_store(struct acpi_device *device, const char *buf, size_t count)
{
- int result;
- int ret = count;
- int islockable;
- acpi_status status;
- acpi_handle handle;
- acpi_object_type type = 0;
+ int result;
+ int ret = count;
+ int islockable;
+ acpi_status status;
+ acpi_handle handle;
+ acpi_object_type type = 0;
if ((!count) || (buf[0] != '1')) {
return -EINVAL;
}
-
#ifndef FORCE_EJECT
if (device->driver == NULL) {
ret = -ENODEV;
}
#endif
status = acpi_get_type(device->handle, &type);
- if (ACPI_FAILURE(status) || (!device->flags.ejectable) ) {
+ if (ACPI_FAILURE(status) || (!device->flags.ejectable)) {
ret = -ENODEV;
goto err;
}
islockable = device->flags.lockable;
handle = device->handle;
- if (type == ACPI_TYPE_PROCESSOR)
- result = acpi_bus_trim(device, 0);
- else
- result = acpi_bus_trim(device, 1);
+ result = acpi_bus_trim(device, 1);
if (!result)
result = acpi_eject_operation(handle, islockable);
if (result) {
ret = -EBUSY;
}
-err:
+ err:
return ret;
}
-
/* --------------------------------------------------------------------------
Performance Management
-------------------------------------------------------------------------- */
-static int
-acpi_bus_get_perf_flags (
- struct acpi_device *device)
+static int acpi_bus_get_perf_flags(struct acpi_device *device)
{
device->performance.state = ACPI_STATE_UNKNOWN;
return 0;
-------------------------------------------------------------------------- */
static LIST_HEAD(acpi_bus_drivers);
-static DECLARE_MUTEX(acpi_bus_drivers_lock);
-
/**
- * acpi_bus_match
- * --------------
+ * 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)
+acpi_bus_match(struct acpi_device *device, struct acpi_driver *driver)
{
if (driver && driver->ops.match)
return driver->ops.match(device, driver);
return acpi_match_ids(device, driver->ids);
}
-
/**
- * acpi_bus_driver_init
- * --------------------
+ * acpi_bus_driver_init - add a device to a driver
+ * @device: the device to add and initialize
+ * @driver: driver for the device
+ *
* Used to initialize a device via its device driver. Called whenever a
* driver is bound to a device. Invokes the driver's add() and start() ops.
*/
static int
-acpi_bus_driver_init (
- struct acpi_device *device,
- struct acpi_driver *driver)
+acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
{
- int result = 0;
+ 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;
* upon possible configuration and currently allocated resources.
*/
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Driver successfully bound to device\n"));
+ return 0;
+}
+
+static int acpi_start_single_object(struct acpi_device *device)
+{
+ int result = 0;
+ struct acpi_driver *driver;
+
+
+ if (!(driver = device->driver))
+ return 0;
+
if (driver->ops.start) {
result = driver->ops.start(device);
if (result && driver->ops.remove)
driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
- return_VALUE(result);
- }
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Driver successfully bound to device\n"));
-
- if (driver->ops.scan) {
- driver->ops.scan(device);
}
- return_VALUE(0);
+ return result;
}
-static int acpi_driver_attach(struct acpi_driver * drv)
+static void acpi_driver_attach(struct acpi_driver *drv)
{
- struct list_head * node, * next;
- int count = 0;
+ 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) {
- struct acpi_device * dev = container_of(node, struct acpi_device, g_list);
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, g_list);
if (dev->driver || !dev->status.present)
continue;
if (!acpi_bus_match(dev, drv)) {
if (!acpi_bus_driver_init(dev, drv)) {
+ acpi_start_single_object(dev);
atomic_inc(&drv->references);
- count++;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n",
+ 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(count);
}
-static int acpi_driver_detach(struct acpi_driver * drv)
+static void acpi_driver_detach(struct acpi_driver *drv)
{
- struct list_head * node, * next;
+ 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) {
- struct acpi_device * dev = container_of(node,struct acpi_device,g_list);
+ list_for_each_safe(node, next, &acpi_device_list) {
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, g_list);
if (dev->driver == drv) {
spin_unlock(&acpi_device_lock);
if (drv->ops.remove)
- drv->ops.remove(dev,ACPI_BUS_REMOVAL_NORMAL);
+ drv->ops.remove(dev, ACPI_BUS_REMOVAL_NORMAL);
spin_lock(&acpi_device_lock);
dev->driver = NULL;
dev->driver_data = NULL;
}
}
spin_unlock(&acpi_device_lock);
- return_VALUE(0);
}
/**
- * acpi_bus_register_driver
- * ------------------------
+ * acpi_bus_register_driver - register a driver with the ACPI bus
+ * @driver: driver being registered
+ *
* Registers a driver with the ACPI bus. Searches the namespace for all
- * 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.
+ * devices that match the driver's criteria and binds. Returns zero for
+ * success or a negative error status for failure.
*/
-int
-acpi_bus_register_driver (
- struct acpi_driver *driver)
+int acpi_bus_register_driver(struct acpi_driver *driver)
{
- int count;
-
- ACPI_FUNCTION_TRACE("acpi_bus_register_driver");
if (acpi_disabled)
- return_VALUE(-ENODEV);
-
- if (!driver)
- return_VALUE(-EINVAL);
+ return -ENODEV;
spin_lock(&acpi_device_lock);
list_add_tail(&driver->node, &acpi_bus_drivers);
spin_unlock(&acpi_device_lock);
- count = acpi_driver_attach(driver);
+ acpi_driver_attach(driver);
- return_VALUE(count);
+ return 0;
}
-EXPORT_SYMBOL(acpi_bus_register_driver);
+EXPORT_SYMBOL(acpi_bus_register_driver);
/**
- * acpi_bus_unregister_driver
- * --------------------------
+ * acpi_bus_unregister_driver - unregisters a driver with the APIC bus
+ * @driver: driver to unregister
+ *
* Unregisters a driver with the ACPI bus. Searches the namespace for all
* devices that match the driver's criteria and unbinds.
*/
-int
-acpi_bus_unregister_driver (
- struct acpi_driver *driver)
+void acpi_bus_unregister_driver(struct acpi_driver *driver)
{
- int error = 0;
-
- ACPI_FUNCTION_TRACE("acpi_bus_unregister_driver");
-
- if (driver) {
- acpi_driver_detach(driver);
+ acpi_driver_detach(driver);
- if (!atomic_read(&driver->references)) {
- spin_lock(&acpi_device_lock);
- list_del_init(&driver->node);
- spin_unlock(&acpi_device_lock);
- }
- } else
- error = -EINVAL;
- return_VALUE(error);
+ if (!atomic_read(&driver->references)) {
+ spin_lock(&acpi_device_lock);
+ list_del_init(&driver->node);
+ spin_unlock(&acpi_device_lock);
+ }
+ return;
}
+
EXPORT_SYMBOL(acpi_bus_unregister_driver);
/**
- * acpi_bus_find_driver
- * --------------------
+ * acpi_bus_find_driver - check if there is a driver installed for the device
+ * @device: device that we are trying to find a supporting driver for
+ *
* Parses the list of registered drivers looking for a driver applicable for
* the specified device.
*/
-static int
-acpi_bus_find_driver (
- struct acpi_device *device)
+static int acpi_bus_find_driver(struct acpi_device *device)
{
- int result = 0;
- struct list_head * node, *next;
+ 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) {
- struct acpi_driver * driver = container_of(node,struct acpi_driver,node);
+ list_for_each_safe(node, next, &acpi_bus_drivers) {
+ struct acpi_driver *driver =
+ container_of(node, struct acpi_driver, node);
atomic_inc(&driver->references);
spin_unlock(&acpi_device_lock);
}
spin_unlock(&acpi_device_lock);
- Done:
- return_VALUE(result);
+ Done:
+ return result;
}
-
/* --------------------------------------------------------------------------
Device Enumeration
-------------------------------------------------------------------------- */
-static int
-acpi_bus_get_flags (
- struct acpi_device *device)
+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);
+
+
+static int acpi_bus_get_flags(struct acpi_device *device)
{
- acpi_status status = AE_OK;
- acpi_handle temp = NULL;
+ 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, acpi_handle handle, int type)
+static void acpi_device_get_busid(struct acpi_device *device,
+ acpi_handle handle, int type)
{
- char bus_id[5] = {'?',0};
- struct acpi_buffer buffer = {sizeof(bus_id), bus_id};
- int i = 0;
+ char bus_id[5] = { '?', 0 };
+ struct acpi_buffer buffer = { sizeof(bus_id), bus_id };
+ int i = 0;
/*
* Bus ID
}
}
-static void acpi_device_set_id(struct acpi_device * device, struct acpi_device * parent,
- acpi_handle handle, int type)
+static void acpi_device_set_id(struct acpi_device *device,
+ struct acpi_device *parent, acpi_handle handle,
+ int type)
{
- struct acpi_device_info *info;
- struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
- char *hid = NULL;
- char *uid = NULL;
+ struct acpi_device_info *info;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ char *hid = NULL;
+ char *uid = NULL;
struct acpi_compatible_id_list *cid_list = NULL;
- acpi_status status;
+ acpi_status status;
switch (type) {
case ACPI_BUS_TYPE_DEVICE:
status = acpi_get_object_info(handle, &buffer);
if (ACPI_FAILURE(status)) {
- printk("%s: Error reading device info\n",__FUNCTION__);
+ printk("%s: Error reading device info\n", __FUNCTION__);
return;
}
* ----
* Fix for the system root bus device -- the only root-level device.
*/
- if ((parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) {
+ if (((acpi_handle)parent == ACPI_ROOT_OBJECT) && (type == ACPI_BUS_TYPE_DEVICE)) {
hid = ACPI_BUS_HID;
strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
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)
+static int acpi_device_set_context(struct acpi_device *device, int type)
{
acpi_status status = AE_OK;
int result = 0;
* to be careful with fixed-feature devices as they all attach to the
* root object.
*/
- if (type != ACPI_BUS_TYPE_POWER_BUTTON &&
+ if (type != ACPI_BUS_TYPE_POWER_BUTTON &&
type != ACPI_BUS_TYPE_SLEEP_BUTTON) {
status = acpi_attach_data(device->handle,
- acpi_bus_data_handler, device);
+ acpi_bus_data_handler, device);
if (ACPI_FAILURE(status)) {
printk("Error attaching device data\n");
return result;
}
-static void acpi_device_get_debug_info(struct acpi_device * device, acpi_handle handle, int type)
+static void acpi_device_get_debug_info(struct acpi_device *device,
+ acpi_handle handle, int type)
{
#ifdef CONFIG_ACPI_DEBUG_OUTPUT
- char *type_string = NULL;
- char name[80] = {'?','\0'};
- struct acpi_buffer buffer = {sizeof(name), name};
+ char *type_string = NULL;
+ char name[80] = { '?', '\0' };
+ struct acpi_buffer buffer = { sizeof(name), name };
switch (type) {
case ACPI_BUS_TYPE_DEVICE:
}
printk(KERN_DEBUG "Found %s %s [%p]\n", type_string, name, handle);
-#endif /*CONFIG_ACPI_DEBUG_OUTPUT*/
+#endif /*CONFIG_ACPI_DEBUG_OUTPUT */
}
-
-static int
-acpi_bus_remove (
- struct acpi_device *dev,
- int rmdevice)
+static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
{
- int result = 0;
- struct acpi_driver *driver;
-
- ACPI_FUNCTION_TRACE("acpi_bus_remove");
+ int result = 0;
+ struct acpi_driver *driver;
+
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))
dev->parent->ops.unbind(dev);
}
-
+
acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
- return_VALUE(0);
+ return 0;
}
-
-int
-acpi_bus_add (
- struct acpi_device **child,
- struct acpi_device *parent,
- acpi_handle handle,
- int type)
+static int
+acpi_add_single_object(struct acpi_device **child,
+ struct acpi_device *parent, acpi_handle handle, int type)
{
- int result = 0;
- struct acpi_device *device = NULL;
+ int result = 0;
+ struct acpi_device *device = NULL;
- ACPI_FUNCTION_TRACE("acpi_bus_add");
if (!child)
- return_VALUE(-EINVAL);
+ return -EINVAL;
- device = kmalloc(sizeof(struct acpi_device), GFP_KERNEL);
+ device = kzalloc(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));
device->handle = handle;
device->parent = parent;
- acpi_device_get_busid(device,handle,type);
+ acpi_device_get_busid(device, handle, type);
/*
* Flags
/*
* Status
* ------
- * See if the device is present. We always assume that non-Device()
- * objects (e.g. thermal zones, power resources, processors, etc.) are
- * present, functioning, etc. (at least when parent object is present).
- * Note that _STA has a different meaning for some objects (e.g.
- * power resources) so we need to be careful how we use it.
+ * See if the device is present. We always assume that non-Device
+ * and non-Processor objects (e.g. thermal zones, power resources,
+ * etc.) are present, functioning, etc. (at least when parent object
+ * is present). Note that _STA has a different meaning for some
+ * objects (e.g. power resources) so we need to be careful how we use
+ * it.
*/
switch (type) {
+ case ACPI_BUS_TYPE_PROCESSOR:
case ACPI_BUS_TYPE_DEVICE:
result = acpi_bus_get_status(device);
if (ACPI_FAILURE(result) || !device->status.present) {
* Hardware ID, Unique ID, & Bus Address
* -------------------------------------
*/
- acpi_device_set_id(device,parent,handle,type);
+ acpi_device_set_id(device, parent, handle, type);
/*
* Power Management
goto end;
}
- /*
+ /*
* Wakeup device management
*-----------------------
*/
goto end;
}
- if ((result = acpi_device_set_context(device,type)))
+ if ((result = acpi_device_set_context(device, type)))
goto end;
- acpi_device_get_debug_info(device,handle,type);
+ acpi_device_get_debug_info(device, handle, type);
- acpi_device_register(device,parent);
+ acpi_device_register(device, parent);
/*
* Bind _ADR-Based Devices
*/
acpi_bus_find_driver(device);
-end:
+ end:
if (!result)
*child = device;
else {
- if (device->pnp.cid_list)
- kfree(device->pnp.cid_list);
+ kfree(device->pnp.cid_list);
kfree(device);
}
- return_VALUE(result);
+ return result;
}
-EXPORT_SYMBOL(acpi_bus_add);
-
-int acpi_bus_scan (struct acpi_device *start)
+static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops)
{
- acpi_status status = AE_OK;
- struct acpi_device *parent = NULL;
- struct acpi_device *child = NULL;
- acpi_handle phandle = NULL;
- acpi_handle chandle = NULL;
- acpi_object_type type = 0;
- u32 level = 1;
+ acpi_status status = AE_OK;
+ struct acpi_device *parent = NULL;
+ struct acpi_device *child = NULL;
+ acpi_handle phandle = NULL;
+ acpi_handle chandle = NULL;
+ 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;
-
+
/*
* Parse through the ACPI namespace, identify all 'devices', and
* create a new 'struct acpi_device' for each.
while ((level > 0) && parent) {
status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
- chandle, &chandle);
+ chandle, &chandle);
/*
* If this scope is exhausted then move our way back up.
continue;
}
- status = acpi_bus_add(&child, parent, chandle, type);
+ if (ops->acpi_op_add)
+ status = acpi_add_single_object(&child, parent,
+ chandle, type);
+ else
+ status = acpi_bus_get_device(chandle, &child);
+
if (ACPI_FAILURE(status))
continue;
+ if (ops->acpi_op_start) {
+ status = acpi_start_single_object(child);
+ if (ACPI_FAILURE(status))
+ continue;
+ }
+
/*
* If the device is present, enabled, and functioning then
* parse its scope (depth-first). Note that we need to
* which will be enumerated when the parent is inserted).
*
* TBD: Need notifications and other detection mechanisms
- * in place before we can fully implement this.
+ * in place before we can fully implement this.
*/
if (child->status.present) {
status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
}
}
- return_VALUE(0);
+ return 0;
}
-EXPORT_SYMBOL(acpi_bus_scan);
+int
+acpi_bus_add(struct acpi_device **child,
+ struct acpi_device *parent, acpi_handle handle, int type)
+{
+ int result;
+ struct acpi_bus_ops ops;
-static int
-acpi_bus_trim(struct acpi_device *start,
- int rmdevice)
+
+ result = acpi_add_single_object(child, parent, handle, type);
+ if (!result) {
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_add = 1;
+ result = acpi_bus_scan(*child, &ops);
+ }
+ return result;
+}
+
+EXPORT_SYMBOL(acpi_bus_add);
+
+int acpi_bus_start(struct acpi_device *device)
+{
+ int result;
+ struct acpi_bus_ops ops;
+
+
+ if (!device)
+ return -EINVAL;
+
+ result = acpi_start_single_object(device);
+ if (!result) {
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_start = 1;
+ result = acpi_bus_scan(device, &ops);
+ }
+ return result;
+}
+
+EXPORT_SYMBOL(acpi_bus_start);
+
+int acpi_bus_trim(struct acpi_device *start, int rmdevice)
{
- acpi_status status;
- struct acpi_device *parent, *child;
- acpi_handle phandle, chandle;
- acpi_object_type type;
- u32 level = 1;
- int err = 0;
-
- parent = start;
+ acpi_status status;
+ struct acpi_device *parent, *child;
+ acpi_handle phandle, chandle;
+ acpi_object_type type;
+ u32 level = 1;
+ int err = 0;
+
+ parent = start;
phandle = start->handle;
child = chandle = NULL;
while ((level > 0) && parent && (!err)) {
status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
- chandle, &chandle);
+ chandle, &chandle);
/*
* If this scope is exhausted then move our way back up.
}
return err;
}
+EXPORT_SYMBOL_GPL(acpi_bus_trim);
-static int
-acpi_bus_scan_fixed (
- struct acpi_device *root)
+
+static int acpi_bus_scan_fixed(struct acpi_device *root)
{
- int result = 0;
- struct acpi_device *device = NULL;
+ 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.
*/
- if (acpi_fadt.pwr_button == 0)
- result = acpi_bus_add(&device, acpi_root,
- NULL, ACPI_BUS_TYPE_POWER_BUTTON);
+ if (acpi_fadt.pwr_button == 0) {
+ result = acpi_add_single_object(&device, acpi_root,
+ NULL,
+ ACPI_BUS_TYPE_POWER_BUTTON);
+ if (!result)
+ result = acpi_start_single_object(device);
+ }
+
+ if (acpi_fadt.sleep_button == 0) {
+ result = acpi_add_single_object(&device, acpi_root,
+ NULL,
+ ACPI_BUS_TYPE_SLEEP_BUTTON);
+ if (!result)
+ result = acpi_start_single_object(device);
+ }
+
+ return result;
+}
- if (acpi_fadt.sleep_button == 0)
- result = acpi_bus_add(&device, acpi_root,
- NULL, ACPI_BUS_TYPE_SLEEP_BUTTON);
- 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;
+}
+
+
+static 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;
+
+ result = kset_register(&acpi_namespace_kset);
+ if (result < 0)
+ printk(KERN_ERR PREFIX "kset_register error: %d\n", result);
- kset_register(&acpi_namespace_kset);
+ result = bus_register(&acpi_bus_type);
+ if (result) {
+ /* We don't want to quit even if we failed to add suspend/resume */
+ printk(KERN_ERR PREFIX "Could not register bus type\n");
+ }
/*
* Create the root device in the bus's device tree
*/
- result = acpi_bus_add(&acpi_root, NULL, ACPI_ROOT_OBJECT,
- ACPI_BUS_TYPE_SYSTEM);
+ result = acpi_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT,
+ ACPI_BUS_TYPE_SYSTEM);
+ if (result)
+ goto Done;
+
+ result = acpi_start_single_object(acpi_root);
if (result)
goto Done;
+ acpi_root->dev.bus = &acpi_bus_type;
+ snprintf(acpi_root->dev.bus_id, BUS_ID_SIZE, "%s", acpi_bus_type.name);
+ result = device_register(&acpi_root->dev);
+ if (result) {
+ /* We don't want to quit even if we failed to add suspend/resume */
+ printk(KERN_ERR PREFIX "Could not register device\n");
+ }
+
/*
* Enumerate devices in the ACPI namespace.
*/
result = acpi_bus_scan_fixed(acpi_root);
- if (!result)
- result = acpi_bus_scan(acpi_root);
+ if (!result) {
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_add = 1;
+ ops.acpi_op_start = 1;
+ result = acpi_bus_scan(acpi_root, &ops);
+ }
if (result)
acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
- Done:
- return_VALUE(result);
+ Done:
+ return result;
}
subsys_initcall(acpi_scan_init);
git://git.onelab.eu / linux-2.6.git / blobdiff