Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
new file mode 100644
index 0000000..e7ca066
--- /dev/null
+++ b/drivers/acpi/scan.c
@@ -0,0 +1,1379 @@
+/*
+ * scan.c - support for transforming the ACPI namespace into individual objects
+ */
+
+#include <linux/module.h>
+#include <linux/init.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")
+
+#define STRUCT_TO_INT(s) (*((int*)&s))
+
+extern struct acpi_device *acpi_root;
+
+
+#define ACPI_BUS_CLASS "system_bus"
+#define ACPI_BUS_HID "ACPI_BUS"
+#define ACPI_BUS_DRIVER_NAME "ACPI Bus Driver"
+#define ACPI_BUS_DEVICE_NAME "System Bus"
+
+static LIST_HEAD(acpi_device_list);
+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)
+{
+ struct acpi_device * dev = container_of(kobj,struct acpi_device,kobj);
+ if (dev->pnp.cid_list)
+ 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);
+};
+
+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,
+};
+
+static int namespace_hotplug(struct kset *kset, struct kobject *kobj,
+ char **envp, int num_envp, char *buffer,
+ int buffer_size)
+{
+ struct acpi_device *dev = to_acpi_device(kobj);
+ int i = 0;
+ int len = 0;
+
+ if (!dev->driver)
+ return 0;
+
+ if (add_hotplug_env_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 acpi_namespace_kset = {
+ .kobj = {
+ .name = "namespace",
+ },
+ .subsys = &acpi_subsys,
+ .ktype = &ktype_acpi_ns,
+ .hotplug_ops = &namespace_hotplug_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 int
+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);
+ return 0;
+}
+
+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)
+{
+ 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)
+{
+ acpi_status status;
+ acpi_handle temp = NULL;
+
+ /*
+ * If device has _EJ0, 'eject' file is created that is used to trigger
+ * hot-removal function from userland.
+ */
+ status = acpi_get_handle(dev->handle, "_EJ0", &temp);
+ if (ACPI_SUCCESS(status))
+ (*(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;
+}
+
+
+/* --------------------------------------------------------------------------
+ Performance Management
+ -------------------------------------------------------------------------- */
+
+static int
+acpi_bus_get_perf_flags (
+ struct acpi_device *device)
+{
+ device->performance.state = ACPI_STATE_UNKNOWN;
+ return 0;
+}
+
+/* --------------------------------------------------------------------------
+ Driver Management
+ -------------------------------------------------------------------------- */
+
+static LIST_HEAD(acpi_bus_drivers);
+static DECLARE_MUTEX(acpi_bus_drivers_lock);
+
+
+/**
+ * acpi_bus_match
+ * --------------
+ * 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)
+{
+ if (driver && driver->ops.match)
+ return driver->ops.match(device, driver);
+ return acpi_match_ids(device, driver->ids);
+}
+
+
+/**
+ * acpi_bus_driver_init
+ * --------------------
+ * 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)
+{
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_driver_init");
+
+ if (!device || !driver)
+ return_VALUE(-EINVAL);
+
+ if (!driver->ops.add)
+ return_VALUE(-ENOSYS);
+
+ result = driver->ops.add(device);
+ if (result) {
+ device->driver = NULL;
+ acpi_driver_data(device) = NULL;
+ return_VALUE(result);
+ }
+
+ device->driver = driver;
+
+ /*
+ * TBD - Configuration Management: Assign resources to device based
+ * upon possible configuration and currently allocated resources.
+ */
+
+ 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);
+}
+
+static int acpi_driver_attach(struct acpi_driver * drv)
+{
+ struct list_head * node, * next;
+ int count = 0;
+
+ 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);
+
+ if (dev->driver || !dev->status.present)
+ continue;
+ spin_unlock(&acpi_device_lock);
+
+ 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(count);
+}
+
+static int acpi_driver_detach(struct acpi_driver * drv)
+{
+ 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);
+
+ 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);
+ }
+ }
+ spin_unlock(&acpi_device_lock);
+ return_VALUE(0);
+}
+
+/**
+ * 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. 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 count;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_register_driver");
+
+ if (acpi_disabled)
+ return_VALUE(-ENODEV);
+
+ if (!driver)
+ return_VALUE(-EINVAL);
+
+ 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);
+
+
+/**
+ * acpi_bus_unregister_driver
+ * --------------------------
+ * 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)
+{
+ int error = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_unregister_driver");
+
+ if (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);
+}
+EXPORT_SYMBOL(acpi_bus_unregister_driver);
+
+/**
+ * acpi_bus_find_driver
+ * --------------------
+ * 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)
+{
+ 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);
+
+ atomic_inc(&driver->references);
+ spin_unlock(&acpi_device_lock);
+ if (!acpi_bus_match(device, driver)) {
+ result = acpi_bus_driver_init(device, driver);
+ if (!result)
+ goto Done;
+ }
+ atomic_dec(&driver->references);
+ spin_lock(&acpi_device_lock);
+ }
+ spin_unlock(&acpi_device_lock);
+
+ Done:
+ return_VALUE(result);
+}
+
+
+/* --------------------------------------------------------------------------
+ Device Enumeration
+ -------------------------------------------------------------------------- */
+
+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);
+ if (ACPI_SUCCESS(status))
+ device->flags.dynamic_status = 1;
+
+ /* Presence of _CID indicates 'compatible_ids' */
+ status = acpi_get_handle(device->handle, "_CID", &temp);
+ if (ACPI_SUCCESS(status))
+ device->flags.compatible_ids = 1;
+
+ /* Presence of _RMV indicates 'removable' */
+ status = acpi_get_handle(device->handle, "_RMV", &temp);
+ if (ACPI_SUCCESS(status))
+ device->flags.removable = 1;
+
+ /* Presence of _EJD|_EJ0 indicates 'ejectable' */
+ status = acpi_get_handle(device->handle, "_EJD", &temp);
+ if (ACPI_SUCCESS(status))
+ device->flags.ejectable = 1;
+ else {
+ status = acpi_get_handle(device->handle, "_EJ0", &temp);
+ if (ACPI_SUCCESS(status))
+ device->flags.ejectable = 1;
+ }
+
+ /* Presence of _LCK indicates 'lockable' */
+ status = acpi_get_handle(device->handle, "_LCK", &temp);
+ if (ACPI_SUCCESS(status))
+ device->flags.lockable = 1;
+
+ /* Presence of _PS0|_PR0 indicates 'power manageable' */
+ status = acpi_get_handle(device->handle, "_PS0", &temp);
+ if (ACPI_FAILURE(status))
+ status = acpi_get_handle(device->handle, "_PR0", &temp);
+ 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);
+}
+
+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;
+
+ /*
+ * Bus ID
+ * ------
+ * The device's Bus ID is simply the object name.
+ * TBD: Shouldn't this value be unique (within the ACPI namespace)?
+ */
+ switch (type) {
+ case ACPI_BUS_TYPE_SYSTEM:
+ strcpy(device->pnp.bus_id, "ACPI");
+ break;
+ case ACPI_BUS_TYPE_POWER_BUTTON:
+ strcpy(device->pnp.bus_id, "PWRF");
+ break;
+ case ACPI_BUS_TYPE_SLEEP_BUTTON:
+ strcpy(device->pnp.bus_id, "SLPF");
+ break;
+ default:
+ acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
+ /* Clean up trailing underscores (if any) */
+ for (i = 3; i > 1; i--) {
+ if (bus_id[i] == '_')
+ bus_id[i] = '\0';
+ else
+ break;
+ }
+ strcpy(device->pnp.bus_id, bus_id);
+ break;
+ }
+}
+
+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_compatible_id_list *cid_list = NULL;
+ 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__);
+ return;
+ }
+
+ info = buffer.pointer;
+ if (info->valid & ACPI_VALID_HID)
+ hid = info->hardware_id.value;
+ if (info->valid & ACPI_VALID_UID)
+ uid = info->unique_id.value;
+ if (info->valid & ACPI_VALID_CID)
+ cid_list = &info->compatibility_id;
+ if (info->valid & ACPI_VALID_ADR) {
+ device->pnp.bus_address = info->address;
+ device->flags.bus_address = 1;
+ }
+ break;
+ case ACPI_BUS_TYPE_POWER:
+ hid = ACPI_POWER_HID;
+ break;
+ case ACPI_BUS_TYPE_PROCESSOR:
+ hid = ACPI_PROCESSOR_HID;
+ break;
+ case ACPI_BUS_TYPE_SYSTEM:
+ hid = ACPI_SYSTEM_HID;
+ break;
+ case ACPI_BUS_TYPE_THERMAL:
+ hid = ACPI_THERMAL_HID;
+ break;
+ case ACPI_BUS_TYPE_POWER_BUTTON:
+ hid = ACPI_BUTTON_HID_POWERF;
+ break;
+ case ACPI_BUS_TYPE_SLEEP_BUTTON:
+ hid = ACPI_BUTTON_HID_SLEEPF;
+ break;
+ }
+
+ /*
+ * \_SB
+ * ----
+ * Fix for the system root bus device -- the only root-level device.
+ */
+ if ((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);
+ }
+
+ if (hid) {
+ strcpy(device->pnp.hardware_id, hid);
+ device->flags.hardware_id = 1;
+ }
+ if (uid) {
+ strcpy(device->pnp.unique_id, uid);
+ device->flags.unique_id = 1;
+ }
+ if (cid_list) {
+ device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL);
+ if (device->pnp.cid_list)
+ memcpy(device->pnp.cid_list, cid_list, cid_list->size);
+ else
+ printk(KERN_ERR "Memory allocation error\n");
+ }
+
+ acpi_os_free(buffer.pointer);
+}
+
+static int acpi_device_set_context(struct acpi_device * device, int type)
+{
+ acpi_status status = AE_OK;
+ int result = 0;
+ /*
+ * Context
+ * -------
+ * Attach this 'struct acpi_device' to the ACPI object. This makes
+ * resolutions from handle->device very efficient. Note that we need
+ * to be careful with fixed-feature devices as they all attach to the
+ * root object.
+ */
+ if (type != ACPI_BUS_TYPE_POWER_BUTTON &&
+ type != ACPI_BUS_TYPE_SLEEP_BUTTON) {
+ status = acpi_attach_data(device->handle,
+ acpi_bus_data_handler, device);
+
+ if (ACPI_FAILURE(status)) {
+ printk("Error attaching device data\n");
+ result = -ENODEV;
+ }
+ }
+ return result;
+}
+
+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};
+
+ switch (type) {
+ case ACPI_BUS_TYPE_DEVICE:
+ type_string = "Device";
+ acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ break;
+ case ACPI_BUS_TYPE_POWER:
+ type_string = "Power Resource";
+ acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ break;
+ case ACPI_BUS_TYPE_PROCESSOR:
+ type_string = "Processor";
+ acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ break;
+ case ACPI_BUS_TYPE_SYSTEM:
+ type_string = "System";
+ acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ break;
+ case ACPI_BUS_TYPE_THERMAL:
+ type_string = "Thermal Zone";
+ acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ break;
+ case ACPI_BUS_TYPE_POWER_BUTTON:
+ type_string = "Power Button";
+ sprintf(name, "PWRB");
+ break;
+ case ACPI_BUS_TYPE_SLEEP_BUTTON:
+ type_string = "Sleep Button";
+ sprintf(name, "SLPB");
+ break;
+ }
+
+ printk(KERN_DEBUG "Found %s %s [%p]\n", type_string, name, handle);
+#endif /*CONFIG_ACPI_DEBUG_OUTPUT*/
+}
+
+
+static 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,
+ acpi_handle handle,
+ int type)
+{
+ int result = 0;
+ struct acpi_device *device = NULL;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_add");
+
+ if (!child)
+ return_VALUE(-EINVAL);
+
+ device = kmalloc(sizeof(struct acpi_device), GFP_KERNEL);
+ if (!device) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Memory allocation error\n"));
+ return_VALUE(-ENOMEM);
+ }
+ memset(device, 0, sizeof(struct acpi_device));
+
+ device->handle = handle;
+ device->parent = parent;
+
+ acpi_device_get_busid(device,handle,type);
+
+ /*
+ * Flags
+ * -----
+ * Get prior to calling acpi_bus_get_status() so we know whether
+ * or not _STA is present. Note that we only look for object
+ * handles -- cannot evaluate objects until we know the device is
+ * present and properly initialized.
+ */
+ result = acpi_bus_get_flags(device);
+ if (result)
+ goto end;
+
+ /*
+ * 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.
+ */
+ switch (type) {
+ case ACPI_BUS_TYPE_DEVICE:
+ result = acpi_bus_get_status(device);
+ if (ACPI_FAILURE(result) || !device->status.present) {
+ result = -ENOENT;
+ goto end;
+ }
+ break;
+ default:
+ STRUCT_TO_INT(device->status) = 0x0F;
+ break;
+ }
+
+ /*
+ * Initialize Device
+ * -----------------
+ * TBD: Synch with Core's enumeration/initialization process.
+ */
+
+ /*
+ * Hardware ID, Unique ID, & Bus Address
+ * -------------------------------------
+ */
+ acpi_device_set_id(device,parent,handle,type);
+
+ /*
+ * Power Management
+ * ----------------
+ */
+ if (device->flags.power_manageable) {
+ result = acpi_bus_get_power_flags(device);
+ if (result)
+ goto end;
+ }
+
+ /*
+ * Wakeup device management
+ *-----------------------
+ */
+ if (device->flags.wake_capable) {
+ result = acpi_bus_get_wakeup_device_flags(device);
+ if (result)
+ goto end;
+ }
+
+ /*
+ * Performance Management
+ * ----------------------
+ */
+ if (device->flags.performance_manageable) {
+ result = acpi_bus_get_perf_flags(device);
+ if (result)
+ goto end;
+ }
+
+ if ((result = acpi_device_set_context(device,type)))
+ goto end;
+
+ acpi_device_get_debug_info(device,handle,type);
+
+ acpi_device_register(device,parent);
+
+ /*
+ * Bind _ADR-Based Devices
+ * -----------------------
+ * If there's a a bus address (_ADR) then we utilize the parent's
+ * 'bind' function (if exists) to bind the ACPI- and natively-
+ * enumerated device representations.
+ */
+ if (device->flags.bus_address) {
+ if (device->parent && device->parent->ops.bind)
+ device->parent->ops.bind(device);
+ }
+
+ /*
+ * Locate & Attach Driver
+ * ----------------------
+ * If there's a hardware id (_HID) or compatible ids (_CID) we check
+ * to see if there's a driver installed for this kind of device. Note
+ * that drivers can install before or after a device is enumerated.
+ *
+ * TBD: Assumes LDM provides driver hot-plug capability.
+ */
+ acpi_bus_find_driver(device);
+
+end:
+ if (!result)
+ *child = device;
+ else {
+ if (device->pnp.cid_list)
+ kfree(device->pnp.cid_list);
+ kfree(device);
+ }
+
+ return_VALUE(result);
+}
+EXPORT_SYMBOL(acpi_bus_add);
+
+
+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 = NULL;
+ acpi_handle chandle = NULL;
+ acpi_object_type type = 0;
+ u32 level = 1;
+
+ ACPI_FUNCTION_TRACE("acpi_bus_scan");
+
+ if (!start)
+ return_VALUE(-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);
+
+ /*
+ * If this scope is exhausted then move our way back up.
+ */
+ if (ACPI_FAILURE(status)) {
+ level--;
+ chandle = phandle;
+ acpi_get_parent(phandle, &phandle);
+ if (parent->parent)
+ parent = parent->parent;
+ continue;
+ }
+
+ status = acpi_get_type(chandle, &type);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ /*
+ * If this is a scope object then parse it (depth-first).
+ */
+ if (type == ACPI_TYPE_LOCAL_SCOPE) {
+ level++;
+ phandle = chandle;
+ chandle = NULL;
+ continue;
+ }
+
+ /*
+ * We're only interested in objects that we consider 'devices'.
+ */
+ switch (type) {
+ case ACPI_TYPE_DEVICE:
+ type = ACPI_BUS_TYPE_DEVICE;
+ break;
+ case ACPI_TYPE_PROCESSOR:
+ type = ACPI_BUS_TYPE_PROCESSOR;
+ break;
+ case ACPI_TYPE_THERMAL:
+ type = ACPI_BUS_TYPE_THERMAL;
+ break;
+ case ACPI_TYPE_POWER:
+ type = ACPI_BUS_TYPE_POWER;
+ break;
+ default:
+ continue;
+ }
+
+ status = acpi_bus_add(&child, parent, chandle, type);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ /*
+ * If the device is present, enabled, and functioning then
+ * parse its scope (depth-first). Note that we need to
+ * represent absent devices to facilitate PnP notifications
+ * -- but only the subtree head (not all of its children,
+ * which will be enumerated when the parent is inserted).
+ *
+ * TBD: Need notifications and other detection mechanisms
+ * in place before we can fully implement this.
+ */
+ if (child->status.present) {
+ status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
+ NULL, NULL);
+ if (ACPI_SUCCESS(status)) {
+ level++;
+ phandle = chandle;
+ chandle = NULL;
+ parent = child;
+ }
+ }
+ }
+
+ return_VALUE(0);
+}
+EXPORT_SYMBOL(acpi_bus_scan);
+
+
+static 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");
+
+ if (!root)
+ return_VALUE(-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.sleep_button == 0)
+ result = acpi_bus_add(&device, acpi_root,
+ NULL, ACPI_BUS_TYPE_SLEEP_BUTTON);
+
+ return_VALUE(result);
+}
+
+
+static int __init acpi_scan_init(void)
+{
+ int result;
+
+ ACPI_FUNCTION_TRACE("acpi_scan_init");
+
+ if (acpi_disabled)
+ return_VALUE(0);
+
+ kset_register(&acpi_namespace_kset);
+
+ /*
+ * Create the root device in the bus's device tree
+ */
+ result = acpi_bus_add(&acpi_root, NULL, ACPI_ROOT_OBJECT,
+ ACPI_BUS_TYPE_SYSTEM);
+ if (result)
+ goto Done;
+
+ /*
+ * Enumerate devices in the ACPI namespace.
+ */
+ result = acpi_bus_scan_fixed(acpi_root);
+ if (!result)
+ result = acpi_bus_scan(acpi_root);
+
+ if (result)
+ acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
+
+ Done:
+ return_VALUE(result);
+}
+
+subsys_initcall(acpi_scan_init);