* scan.c - support for transforming the ACPI namespace into individual objects
*/
+#include <linux/module.h>
#include <linux/init.h>
#include <linux/acpi.h>
-#include <linux/module.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acinterp.h> /* for acpi_ex_eisa_id_to_string() */
#define STRUCT_TO_INT(s) (*((int*)&s))
extern struct acpi_device *acpi_root;
-struct acpi_device *acpi_fixed_pwr_button;
-struct acpi_device *acpi_fixed_sleep_button;
-
-EXPORT_SYMBOL(acpi_fixed_pwr_button);
-EXPORT_SYMBOL(acpi_fixed_sleep_button);
-
#define ACPI_BUS_CLASS "system_bus"
#define ACPI_BUS_DEVICE_NAME "System Bus"
static LIST_HEAD(acpi_device_list);
-static spinlock_t acpi_device_lock = SPIN_LOCK_UNLOCKED;
+DEFINE_SPINLOCK(acpi_device_lock);
+LIST_HEAD(acpi_wakeup_device_list);
static void acpi_device_release(struct kobject * kobj)
{
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);
+};
+
+typedef void acpi_device_sysfs_files(struct kobject *,
+ const struct attribute *);
+
+static void setup_sys_fs_device_files(struct acpi_device *dev,
+ 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 acpi_device *device = to_acpi_device(kobj);
+ struct acpi_device_attribute *attribute = to_handle_attr(attr);
+ return attribute->show ? attribute->show(device, buf) : 0;
+}
+static ssize_t acpi_device_attr_store(struct kobject *kobj,
+ 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;
+}
+
+static struct sysfs_ops acpi_device_sysfs_ops = {
+ .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,
};
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->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);
- kobject_init(&device->kobj);
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_add(&device->kobj);
+ kobject_register(&device->kobj);
+ create_sysfs_device_files(device);
}
static int
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);
return 0;
}
struct acpi_device *device)
{
acpi_status status = 0;
- acpi_handle handle = 0;
+ acpi_handle handle = NULL;
u32 i = 0;
ACPI_FUNCTION_TRACE("acpi_bus_get_power_flags");
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
device->power.state = ACPI_STATE_UNKNOWN;
- return 0;
+ return_VALUE(0);
+}
+
+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;
+
+end:
+ if (ACPI_FAILURE(status))
+ device->flags.wake_capable = 0;
+ return_VALUE(0);
+}
+
+/* --------------------------------------------------------------------------
+ ACPI hotplug sysfs device file support
+ -------------------------------------------------------------------------- */
+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 = \
+ __ATTR(_name, _mode, _show, _store)
+
+ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
+
+/**
+ * setup_sys_fs_device_files - sets up the device files under device namespace
+ * @@dev: acpi_device object
+ * @@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)
+{
+ if (dev->flags.ejectable == 1)
+ (*(func))(&dev->kobj,&acpi_device_attr_eject.attr);
+}
+
+static int
+acpi_eject_operation(acpi_handle handle, int lockable)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status = AE_OK;
+
+ /*
+ * TBD: evaluate _PS3?
+ */
+
+ if (lockable) {
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = 0;
+ acpi_evaluate_object(handle, "_LCK", &arg_list, NULL);
+ }
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = 1;
+
+ /*
+ * TBD: _EJD support.
+ */
+
+ status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
+ if (ACPI_FAILURE(status)) {
+ return(-ENODEV);
+ }
+
+ 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;
+
+ if ((!count) || (buf[0] != '1')) {
+ return -EINVAL;
+ }
+
+#ifndef FORCE_EJECT
+ if (device->driver == NULL) {
+ ret = -ENODEV;
+ goto err;
+ }
+#endif
+ status = acpi_get_type(device->handle, &type);
+ 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);
+
+ if (!result)
+ result = acpi_eject_operation(handle, islockable);
+
+ if (result) {
+ ret = -EBUSY;
+ }
+err:
+ return ret;
}
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;
+ if (driver && driver->ops.match)
+ return driver->ops.match(device, driver);
+ 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)
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);
+ spin_lock(&acpi_device_lock);
dev->driver = NULL;
dev->driver_data = NULL;
atomic_dec(&drv->references);
* 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);
}
+EXPORT_SYMBOL(acpi_bus_register_driver);
/**
error = -EINVAL;
return_VALUE(error);
}
+EXPORT_SYMBOL(acpi_bus_unregister_driver);
/**
* acpi_bus_find_driver
ACPI_FUNCTION_TRACE("acpi_bus_find_driver");
- if (!device->flags.hardware_id && !device->flags.compatible_ids)
- goto Done;
-
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);
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);
#ifdef CONFIG_ACPI_DEBUG_OUTPUT
char *type_string = NULL;
char name[80] = {'?','\0'};
- acpi_buffer buffer = {sizeof(name), name};
+ struct acpi_buffer buffer = {sizeof(name), name};
switch (type) {
case ACPI_BUS_TYPE_DEVICE:
#endif /*CONFIG_ACPI_DEBUG_OUTPUT*/
}
-static int
+
+int
+acpi_bus_remove (
+ struct acpi_device *dev,
+ int rmdevice)
+{
+ int result = 0;
+ struct acpi_driver *driver;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_remove");
+
+ if (!dev)
+ return_VALUE(-EINVAL);
+
+ driver = dev->driver;
+
+ if ((driver) && (driver->ops.remove)) {
+
+ if (driver->ops.stop) {
+ result = driver->ops.stop(dev, ACPI_BUS_REMOVAL_EJECT);
+ if (result)
+ return_VALUE(result);
+ }
+
+ result = dev->driver->ops.remove(dev, ACPI_BUS_REMOVAL_EJECT);
+ if (result) {
+ return_VALUE(result);
+ }
+
+ atomic_dec(&dev->driver->references);
+ dev->driver = NULL;
+ acpi_driver_data(dev) = NULL;
+ }
+
+ if (!rmdevice)
+ return_VALUE(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);
+}
+
+
+int
acpi_bus_add (
struct acpi_device **child,
struct acpi_device *parent,
goto end;
}
+ /*
+ * Wakeup device management
+ *-----------------------
+ */
+ if (device->flags.wake_capable) {
+ result = acpi_bus_get_wakeup_device_flags(device);
+ if (result)
+ goto end;
+ }
+
/*
* Performance Management
* ----------------------
return_VALUE(result);
}
+EXPORT_SYMBOL(acpi_bus_add);
-
-static int acpi_bus_scan (struct acpi_device *start)
+int acpi_bus_scan (struct acpi_device *start)
{
acpi_status status = AE_OK;
struct acpi_device *parent = NULL;
struct acpi_device *child = NULL;
- acpi_handle phandle = 0;
- acpi_handle chandle = 0;
+ acpi_handle phandle = NULL;
+ acpi_handle chandle = NULL;
acpi_object_type type = 0;
u32 level = 1;
if (type == ACPI_TYPE_LOCAL_SCOPE) {
level++;
phandle = chandle;
- chandle = 0;
+ chandle = NULL;
continue;
}
*/
if (child->status.present) {
status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
- 0, NULL);
+ NULL, NULL);
if (ACPI_SUCCESS(status)) {
level++;
phandle = chandle;
- chandle = 0;
+ chandle = NULL;
parent = child;
}
}
return_VALUE(0);
}
+EXPORT_SYMBOL(acpi_bus_scan);
+
+
+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;
+ phandle = start->handle;
+ child = chandle = NULL;
+ while ((level > 0) && parent && (!err)) {
+ status = acpi_get_next_object(ACPI_TYPE_ANY, phandle,
+ chandle, &chandle);
+
+ /*
+ * If this scope is exhausted then move our way back up.
+ */
+ if (ACPI_FAILURE(status)) {
+ level--;
+ chandle = phandle;
+ acpi_get_parent(phandle, &phandle);
+ child = parent;
+ parent = parent->parent;
+
+ if (level == 0)
+ err = acpi_bus_remove(child, rmdevice);
+ else
+ err = acpi_bus_remove(child, 1);
+
+ continue;
+ }
+
+ status = acpi_get_type(chandle, &type);
+ if (ACPI_FAILURE(status)) {
+ continue;
+ }
+ /*
+ * If there is a device corresponding to chandle then
+ * parse it (depth-first).
+ */
+ if (acpi_bus_get_device(chandle, &child) == 0) {
+ level++;
+ phandle = chandle;
+ chandle = NULL;
+ parent = child;
+ }
+ continue;
+ }
+ return err;
+}
static int
acpi_bus_scan_fixed (
struct acpi_device *root)
{
int result = 0;
+ struct acpi_device *device = NULL;
ACPI_FUNCTION_TRACE("acpi_bus_scan_fixed");
- acpi_fixed_pwr_button = NULL;
- acpi_fixed_sleep_button = NULL;
-
-
if (!root)
return_VALUE(-ENODEV);
* Enumerate all fixed-feature devices.
*/
if (acpi_fadt.pwr_button == 0)
- result = acpi_bus_add(&acpi_fixed_pwr_button, acpi_root,
+ result = acpi_bus_add(&device, acpi_root,
NULL, ACPI_BUS_TYPE_POWER_BUTTON);
if (acpi_fadt.sleep_button == 0)
- result = acpi_bus_add(&acpi_fixed_sleep_button, acpi_root,
+ result = acpi_bus_add(&device, acpi_root,
NULL, ACPI_BUS_TYPE_SLEEP_BUTTON);
return_VALUE(result);
git://git.onelab.eu / linux-2.6.git / blobdiff