#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;
#define ACPI_BUS_CLASS "system_bus"
-#define ACPI_BUS_HID "ACPI_BUS"
-#define ACPI_BUS_DRIVER_NAME "ACPI Bus Driver"
+#define ACPI_BUS_HID "LNXSYBUS"
#define ACPI_BUS_DEVICE_NAME "System Bus"
static LIST_HEAD(acpi_device_list);
+static LIST_HEAD(acpi_bus_id_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);
- 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);
+struct acpi_device_bus_id{
+ char bus_id[15];
+ unsigned int instance_no;
+ struct list_head node;
};
-typedef void acpi_device_sysfs_files(struct kobject *,
- const struct attribute *);
+/*
+ * Creates hid/cid(s) string needed for modalias and uevent
+ * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
+ * char *modalias: "acpi:IBM0001:ACPI0001"
+*/
+int create_modalias(struct acpi_device *acpi_dev, char *modalias, int size){
-static void setup_sys_fs_device_files(struct acpi_device *dev,
- acpi_device_sysfs_files * func);
+ int len;
-#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)
+ if (!acpi_dev->flags.hardware_id)
+ return -ENODEV;
-#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);
+ len = snprintf(modalias, size, "acpi:%s:",
+ acpi_dev->pnp.hardware_id);
+ if (len < 0 || len >= size)
+ return -EINVAL;
+ size -= len;
-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) : -EIO;
-}
-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) : -EIO;
-}
+ if (acpi_dev->flags.compatible_ids) {
+ struct acpi_compatible_id_list *cid_list;
+ int i;
+ int count;
-static struct sysfs_ops acpi_device_sysfs_ops = {
- .show = acpi_device_attr_show,
- .store = acpi_device_attr_store,
-};
+ cid_list = acpi_dev->pnp.cid_list;
+ for (i = 0; i < cid_list->count; i++) {
+ count = snprintf(&modalias[len], size, "%s:",
+ cid_list->id[i].value);
+ if (count < 0 || count >= size) {
+ printk(KERN_ERR "acpi: %s cid[%i] exceeds event buffer size",
+ acpi_dev->pnp.device_name, i);
+ break;
+ }
+ len += count;
+ size -= count;
+ }
+ }
-static struct kobj_type ktype_acpi_ns = {
- .sysfs_ops = &acpi_device_sysfs_ops,
- .release = acpi_device_release,
-};
+ modalias[len] = '\0';
+ return len;
+}
-static int namespace_uevent(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;
+static ssize_t
+acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ int len;
- if (!dev->driver)
+ /* Device has no HID and no CID or string is >1024 */
+ len = create_modalias(acpi_dev, buf, 1024);
+ if (len <= 0)
return 0;
+ buf[len++] = '\n';
+ return len;
+}
+static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
- if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
- "PHYSDEVDRIVER=%s", dev->driver->name))
- return -ENOMEM;
-
- envp[i] = NULL;
+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;
- return 0;
-}
+ /*
+ * TBD: evaluate _PS3?
+ */
-static struct kset_uevent_ops namespace_uevent_ops = {
- .uevent = &namespace_uevent,
-};
+ 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);
+ }
-static struct kset acpi_namespace_kset = {
- .kobj = {
- .name = "namespace",
- },
- .subsys = &acpi_subsys,
- .ktype = &ktype_acpi_ns,
- .uevent_ops = &namespace_uevent_ops,
-};
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = 1;
-static void acpi_device_register(struct acpi_device *device,
- struct acpi_device *parent)
-{
/*
- * Linkage
- * -------
- * Link this device to its parent and siblings.
+ * TBD: _EJD support.
*/
- 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);
+ status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
+ if (ACPI_FAILURE(status)) {
+ return (-ENODEV);
+ }
- 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);
+ return (0);
}
-static int acpi_device_unregister(struct acpi_device *device, int type)
+static ssize_t
+acpi_eject_store(struct device *d, struct device_attribute *attr,
+ const char *buf, size_t count)
{
- spin_lock(&acpi_device_lock);
- if (device->parent) {
- list_del(&device->node);
- list_del(&device->g_list);
- } else
- list_del(&device->g_list);
+ int result;
+ int ret = count;
+ int islockable;
+ acpi_status status;
+ acpi_handle handle;
+ acpi_object_type type = 0;
+ struct acpi_device *acpi_device = to_acpi_device(d);
- list_del(&device->wakeup_list);
+ if ((!count) || (buf[0] != '1')) {
+ return -EINVAL;
+ }
+#ifndef FORCE_EJECT
+ if (acpi_device->driver == NULL) {
+ ret = -ENODEV;
+ goto err;
+ }
+#endif
+ status = acpi_get_type(acpi_device->handle, &type);
+ if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) {
+ ret = -ENODEV;
+ goto err;
+ }
- spin_unlock(&acpi_device_lock);
+ islockable = acpi_device->flags.lockable;
+ handle = acpi_device->handle;
- acpi_detach_data(device->handle, acpi_bus_data_handler);
- remove_sysfs_device_files(device);
- kobject_unregister(&device->kobj);
- return 0;
+ result = acpi_bus_trim(acpi_device, 1);
+
+ if (!result)
+ result = acpi_eject_operation(handle, islockable);
+
+ if (result) {
+ ret = -EBUSY;
+ }
+ err:
+ return ret;
}
-void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context)
-{
- ACPI_FUNCTION_TRACE("acpi_bus_data_handler");
+static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
- /* TBD */
+static ssize_t
+acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) {
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
- return_VOID;
+ return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id);
}
+static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
-static int acpi_bus_get_power_flags(struct acpi_device *device)
-{
- acpi_status status = 0;
- acpi_handle handle = NULL;
- u32 i = 0;
+static ssize_t
+acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) {
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
+ int result;
- ACPI_FUNCTION_TRACE("acpi_bus_get_power_flags");
+ result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path);
+ if(result)
+ goto end;
- /*
- * 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;
+ result = sprintf(buf, "%s\n", (char*)path.pointer);
+ kfree(path.pointer);
+ end:
+ return result;
+}
+static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL);
+
+static int acpi_device_setup_files(struct acpi_device *dev)
+{
+ acpi_status status;
+ acpi_handle temp;
+ int result = 0;
/*
- * Enumerate supported power management states
+ * Devices gotten from FADT don't have a "path" attribute
*/
- 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;
- }
+ if(dev->handle) {
+ result = device_create_file(&dev->dev, &dev_attr_path);
+ if(result)
+ goto end;
+ }
- /* State is valid if we have some power control */
- if (ps->resources.count || ps->flags.explicit_set)
- ps->flags.valid = 1;
+ if(dev->flags.hardware_id) {
+ result = device_create_file(&dev->dev, &dev_attr_hid);
+ if(result)
+ goto end;
+ }
- ps->power = -1; /* Unknown - driver assigned */
- ps->latency = -1; /* Unknown - driver assigned */
+ if (dev->flags.hardware_id || dev->flags.compatible_ids){
+ result = device_create_file(&dev->dev, &dev_attr_modalias);
+ if(result)
+ goto end;
}
- /* 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;
+ /*
+ * 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))
+ result = device_create_file(&dev->dev, &dev_attr_eject);
+ end:
+ return result;
+}
- /* TBD: System wake support and resource requirements. */
+static void acpi_device_remove_files(struct acpi_device *dev)
+{
+ acpi_status status;
+ acpi_handle temp;
- device->power.state = ACPI_STATE_UNKNOWN;
+ /*
+ * 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))
+ device_remove_file(&dev->dev, &dev_attr_eject);
- return_VALUE(0);
+ if (dev->flags.hardware_id || dev->flags.compatible_ids)
+ device_remove_file(&dev->dev, &dev_attr_modalias);
+
+ if(dev->flags.hardware_id)
+ device_remove_file(&dev->dev, &dev_attr_hid);
+ if(dev->handle)
+ device_remove_file(&dev->dev, &dev_attr_path);
}
+/* --------------------------------------------------------------------------
+ ACPI Bus operations
+ -------------------------------------------------------------------------- */
-int acpi_match_ids(struct acpi_device *device, char *ids)
+int acpi_match_device_ids(struct acpi_device *device,
+ const struct acpi_device_id *ids)
{
- int error = 0;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ const struct acpi_device_id *id;
- if (device->flags.hardware_id)
- if (strstr(ids, device->pnp.hardware_id))
- goto Done;
+ if (device->flags.hardware_id) {
+ for (id = ids; id->id[0]; id++) {
+ if (!strcmp((char*)id->id, 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))
- goto Done;
+ for (id = ids; id->id[0]; id++) {
+ /* compare multiple _CID entries against driver ids */
+ for (i = 0; i < cid_list->count; i++) {
+ if (!strcmp((char*)id->id,
+ cid_list->id[i].value))
+ return 0;
+ }
}
}
- error = -ENOENT;
- Done:
- if (buffer.pointer)
- acpi_os_free(buffer.pointer);
- return error;
+ return -ENOENT;
}
+EXPORT_SYMBOL(acpi_match_device_ids);
-static acpi_status
-acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
- union acpi_object *package)
+static void acpi_device_release(struct device *dev)
{
- int i = 0;
- union acpi_object *element = NULL;
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
- if (!device || !package || (package->package.count < 2))
- return AE_BAD_PARAMETER;
+ kfree(acpi_dev->pnp.cid_list);
+ kfree(acpi_dev);
+}
- 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;
+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;
- element = &(package->package.elements[1]);
- if (element->type != ACPI_TYPE_INTEGER) {
- return AE_BAD_DATA;
+ 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)
+{
+ 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;
+}
+
+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);
+
+ return !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
+}
+
+static int acpi_device_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
+{
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+
+ strcpy(buffer, "MODALIAS=");
+ if (create_modalias(acpi_dev, buffer + 9, buffer_size - 9) > 0) {
+ envp[0] = buffer;
+ envp[1] = NULL;
}
- device->wakeup.sleep_state = element->integer.value;
+ return 0;
+}
- if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
- return AE_NO_MEMORY;
+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) {
+ if (acpi_dev->bus_ops.acpi_op_start)
+ 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);
}
- 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;
- }
+ return ret;
+}
- device->wakeup.resources.handles[i] = element->reference.handle;
+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_dev->removal_type);
+ if (acpi_drv->ops.remove)
+ acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type);
}
+ acpi_dev->driver = NULL;
+ acpi_driver_data(dev) = NULL;
- return AE_OK;
+ put_device(dev);
+ return 0;
}
-static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
+static void acpi_device_shutdown(struct device *dev)
{
- acpi_status status = 0;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- union acpi_object *package = NULL;
+ struct acpi_device *acpi_dev = to_acpi_device(dev);
+ struct acpi_driver *acpi_drv = acpi_dev->driver;
- ACPI_FUNCTION_TRACE("acpi_bus_get_wakeup_flags");
+ if (acpi_drv && acpi_drv->ops.shutdown)
+ acpi_drv->ops.shutdown(acpi_dev);
- /* _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;
+ return ;
+}
+
+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 int acpi_device_register(struct acpi_device *device,
+ struct acpi_device *parent)
+{
+ int result;
+ struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id;
+ int found = 0;
+ /*
+ * 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);
+
+ new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
+ if (!new_bus_id) {
+ printk(KERN_ERR PREFIX "Memory allocation error\n");
+ return -ENOMEM;
}
- 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;
+ spin_lock(&acpi_device_lock);
+ /*
+ * Find suitable bus_id and instance number in acpi_bus_id_list
+ * If failed, create one and link it into acpi_bus_id_list
+ */
+ list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) {
+ if(!strcmp(acpi_device_bus_id->bus_id, device->flags.hardware_id? device->pnp.hardware_id : "device")) {
+ acpi_device_bus_id->instance_no ++;
+ found = 1;
+ kfree(new_bus_id);
+ break;
+ }
}
+ if(!found) {
+ acpi_device_bus_id = new_bus_id;
+ strcpy(acpi_device_bus_id->bus_id, device->flags.hardware_id ? device->pnp.hardware_id : "device");
+ acpi_device_bus_id->instance_no = 0;
+ list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list);
+ }
+ sprintf(device->dev.bus_id, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no);
- acpi_os_free(buffer.pointer);
+ 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);
- 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;
+ if (device->parent)
+ device->dev.parent = &parent->dev;
+ device->dev.bus = &acpi_bus_type;
+ device_initialize(&device->dev);
+ device->dev.release = &acpi_device_release;
+ result = device_add(&device->dev);
+ if(result) {
+ printk("Error adding device %s", device->dev.bus_id);
+ goto end;
+ }
- end:
- if (ACPI_FAILURE(status))
- device->flags.wake_capable = 0;
- return_VALUE(0);
+ result = acpi_device_setup_files(device);
+ if(result)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error creating sysfs interface for device %s\n", device->dev.bus_id));
+
+ device->removal_type = ACPI_BUS_REMOVAL_NORMAL;
+ return 0;
+ end:
+ 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);
+ return result;
}
-/* --------------------------------------------------------------------------
- ACPI sysfs device file support
- -------------------------------------------------------------------------- */
-static ssize_t acpi_eject_store(struct acpi_device *device,
- const char *buf, size_t count);
+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);
-#define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \
-static struct acpi_device_attribute acpi_device_attr_##_name = \
- __ATTR(_name, _mode, _show, _store)
+ list_del(&device->wakeup_list);
+ spin_unlock(&acpi_device_lock);
-ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
+ acpi_detach_data(device->handle, acpi_bus_data_handler);
+
+ acpi_device_remove_files(device);
+ device_unregister(&device->dev);
+}
+/* --------------------------------------------------------------------------
+ Driver Management
+ -------------------------------------------------------------------------- */
/**
- * 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
+ * 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() ops.
*/
-static void
-setup_sys_fs_device_files(struct acpi_device *dev,
- acpi_device_sysfs_files * func)
+static int
+acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
{
- acpi_status status;
- acpi_handle temp = NULL;
+ int result = 0;
- /*
- * 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;
+ if (!device || !driver)
+ return -EINVAL;
- /*
- * TBD: evaluate _PS3?
- */
+ if (!driver->ops.add)
+ return -ENOSYS;
- 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);
+ result = driver->ops.add(device);
+ if (result) {
+ device->driver = NULL;
+ acpi_driver_data(device) = NULL;
+ return result;
}
- arg_list.count = 1;
- arg_list.pointer = &arg;
- arg.type = ACPI_TYPE_INTEGER;
- arg.integer.value = 1;
+ device->driver = driver;
/*
- * TBD: _EJD support.
+ * TBD - Configuration Management: Assign resources to device based
+ * upon possible configuration and currently allocated resources.
*/
- status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL);
- if (ACPI_FAILURE(status)) {
- return (-ENODEV);
- }
-
- return (0);
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Driver successfully bound to device\n"));
+ return 0;
}
-static ssize_t
-acpi_eject_store(struct acpi_device *device, const char *buf, size_t count)
+static int acpi_start_single_object(struct acpi_device *device)
{
- int result;
- int ret = count;
- int islockable;
- acpi_status status;
- acpi_handle handle;
- acpi_object_type type = 0;
+ int result = 0;
+ struct acpi_driver *driver;
- 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;
+
+ 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);
}
- islockable = device->flags.lockable;
- handle = device->handle;
+ return result;
+}
- if (type == ACPI_TYPE_PROCESSOR)
- result = acpi_bus_trim(device, 0);
- else
- result = acpi_bus_trim(device, 1);
+/**
+ * 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 zero for
+ * success or a negative error status for failure.
+ */
+int acpi_bus_register_driver(struct acpi_driver *driver)
+{
+ int ret;
- if (!result)
- result = acpi_eject_operation(handle, islockable);
+ if (acpi_disabled)
+ return -ENODEV;
+ driver->drv.name = driver->name;
+ driver->drv.bus = &acpi_bus_type;
+ driver->drv.owner = driver->owner;
- if (result) {
- ret = -EBUSY;
- }
- err:
+ ret = driver_register(&driver->drv);
return ret;
}
-/* --------------------------------------------------------------------------
- Performance Management
- -------------------------------------------------------------------------- */
+EXPORT_SYMBOL(acpi_bus_register_driver);
-static int acpi_bus_get_perf_flags(struct acpi_device *device)
+/**
+ * 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.
+ */
+void acpi_bus_unregister_driver(struct acpi_driver *driver)
{
- device->performance.state = ACPI_STATE_UNKNOWN;
- return 0;
+ driver_unregister(&driver->drv);
}
+EXPORT_SYMBOL(acpi_bus_unregister_driver);
+
/* --------------------------------------------------------------------------
- Driver Management
+ 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;
-static LIST_HEAD(acpi_bus_drivers);
-static DECLARE_MUTEX(acpi_bus_drivers_lock);
+ status = acpi_get_handle(handle, "_EJD", &tmp);
+ if (ACPI_FAILURE(status))
+ return status;
-/**
- * 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)
+ 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)
{
- if (driver && driver->ops.match)
- return driver->ops.match(device, driver);
- return acpi_match_ids(device, driver->ids);
+
+ /* TBD */
+
+ return;
}
-/**
- * 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)
+static int acpi_bus_get_perf_flags(struct acpi_device *device)
{
- int result = 0;
+ device->performance.state = ACPI_STATE_UNKNOWN;
+ return 0;
+}
- ACPI_FUNCTION_TRACE("acpi_bus_driver_init");
+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 || !driver)
- return_VALUE(-EINVAL);
+ if (!device || !package || (package->package.count < 2))
+ return AE_BAD_PARAMETER;
- if (!driver->ops.add)
- return_VALUE(-ENOSYS);
+ 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;
- result = driver->ops.add(device);
- if (result) {
- device->driver = NULL;
- acpi_driver_data(device) = NULL;
- return_VALUE(result);
+ element = &(package->package.elements[1]);
+ if (element->type != ACPI_TYPE_INTEGER) {
+ return AE_BAD_DATA;
}
+ device->wakeup.sleep_state = element->integer.value;
- device->driver = driver;
+ 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;
+ }
- /*
- * TBD - Configuration Management: Assign resources to device based
- * upon possible configuration and currently allocated resources.
- */
+ device->wakeup.resources.handles[i] = element->reference.handle;
+ }
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Driver successfully bound to device\n"));
- return_VALUE(0);
+ return AE_OK;
}
-static int acpi_start_single_object(struct acpi_device *device)
+static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
{
- int result = 0;
- struct acpi_driver *driver;
+ acpi_status status = 0;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *package = NULL;
- ACPI_FUNCTION_TRACE("acpi_start_single_object");
+ struct acpi_device_id button_device_ids[] = {
+ {"PNP0C0D", 0},
+ {"PNP0C0C", 0},
+ {"PNP0C0E", 0},
+ {"", 0},
+ };
- if (!(driver = device->driver))
- return_VALUE(0);
- if (driver->ops.start) {
- result = driver->ops.start(device);
- if (result && driver->ops.remove)
- driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
+ /* _PRW */
+ status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
+ goto end;
}
- return_VALUE(result);
-}
-
-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)) {
- acpi_start_single_object(dev);
- 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);
+ 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;
}
- spin_unlock(&acpi_device_lock);
- return_VALUE(count);
-}
-static int acpi_driver_detach(struct acpi_driver *drv)
-{
- struct list_head *node, *next;
+ kfree(buffer.pointer);
- ACPI_FUNCTION_TRACE("acpi_driver_detach");
+ device->wakeup.flags.valid = 1;
+ /* Power button, Lid switch always enable wakeup */
+ if (!acpi_match_device_ids(device, button_device_ids))
+ device->wakeup.flags.run_wake = 1;
- 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);
+ end:
+ if (ACPI_FAILURE(status))
+ device->flags.wake_capable = 0;
+ return 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)
+static int acpi_bus_get_power_flags(struct acpi_device *device)
{
- 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);
-}
+ acpi_status status = 0;
+ acpi_handle handle = NULL;
+ u32 i = 0;
-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;
+ /*
+ * 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;
- ACPI_FUNCTION_TRACE("acpi_bus_unregister_driver");
+ /*
+ * 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' };
- if (driver) {
- acpi_driver_detach(driver);
+ /* 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;
+ }
- if (!atomic_read(&driver->references)) {
- spin_lock(&acpi_device_lock);
- list_del_init(&driver->node);
- spin_unlock(&acpi_device_lock);
+ /* 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;
}
- } else
- error = -EINVAL;
- return_VALUE(error);
-}
-EXPORT_SYMBOL(acpi_bus_unregister_driver);
+ /* State is valid if we have some power control */
+ if (ps->resources.count || ps->flags.explicit_set)
+ ps->flags.valid = 1;
-/**
- * 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;
+ ps->power = -1; /* Unknown - driver assigned */
+ ps->latency = -1; /* Unknown - driver assigned */
+ }
- ACPI_FUNCTION_TRACE("acpi_bus_find_driver");
+ /* 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;
- 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);
+ /* TBD: System wake support and resource requirements. */
- Done:
- return_VALUE(result);
-}
+ device->power.state = ACPI_STATE_UNKNOWN;
-/* --------------------------------------------------------------------------
- Device Enumeration
- -------------------------------------------------------------------------- */
+ 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,
}
}
+static int
+acpi_video_bus_match(struct acpi_device *device)
+{
+ acpi_handle h_dummy1;
+ acpi_handle h_dummy2;
+ acpi_handle h_dummy3;
+
+
+ if (!device)
+ return -EINVAL;
+
+ /* Since there is no HID, CID for ACPI Video drivers, we have
+ * to check well known required nodes for each feature we support.
+ */
+
+ /* Does this device able to support video switching ? */
+ if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy1)) &&
+ ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy2)))
+ return 0;
+
+ /* Does this device able to retrieve a video ROM ? */
+ if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_ROM", &h_dummy1)))
+ return 0;
+
+ /* Does this device able to configure which video head to be POSTed ? */
+ if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_VPO", &h_dummy1)) &&
+ ACPI_SUCCESS(acpi_get_handle(device->handle, "_GPD", &h_dummy2)) &&
+ ACPI_SUCCESS(acpi_get_handle(device->handle, "_SPD", &h_dummy3)))
+ return 0;
+
+ return -ENODEV;
+}
+
+/*
+ * acpi_bay_match - see if a device is an ejectable driver bay
+ *
+ * If an acpi object is ejectable and has one of the ACPI ATA methods defined,
+ * then we can safely call it an ejectable drive bay
+ */
+static int acpi_bay_match(struct acpi_device *device){
+ acpi_status status;
+ acpi_handle handle;
+ acpi_handle tmp;
+ acpi_handle phandle;
+
+ handle = device->handle;
+
+ status = acpi_get_handle(handle, "_EJ0", &tmp);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp))))
+ return 0;
+
+ if (acpi_get_parent(handle, &phandle))
+ return -ENODEV;
+
+ if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) ||
+ (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp))))
+ return 0;
+
+ return -ENODEV;
+}
+
static void acpi_device_set_id(struct acpi_device *device,
struct acpi_device *parent, acpi_handle handle,
int type)
device->pnp.bus_address = info->address;
device->flags.bus_address = 1;
}
+
+ if(!(info->valid & (ACPI_VALID_HID | ACPI_VALID_CID))){
+ status = acpi_video_bus_match(device);
+ if(ACPI_SUCCESS(status))
+ hid = ACPI_VIDEO_HID;
+
+ status = acpi_bay_match(device);
+ if (ACPI_SUCCESS(status))
+ hid = ACPI_BAY_HID;
+ }
break;
case ACPI_BUS_TYPE_POWER:
hid = ACPI_POWER_HID;
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)
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);
- }
+ return -EINVAL;
- atomic_dec(&dev->driver->references);
- dev->driver = NULL;
- acpi_driver_data(dev) = NULL;
- }
+ dev->removal_type = ACPI_BUS_REMOVAL_EJECT;
+ device_release_driver(&dev->dev);
if (!rmdevice)
- return_VALUE(0);
+ return 0;
+ /*
+ * unbind _ADR-Based Devices when hot removal
+ */
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;
}
static int
acpi_add_single_object(struct acpi_device **child,
- struct acpi_device *parent, acpi_handle handle, int type)
+ struct acpi_device *parent, acpi_handle handle, int type,
+ struct acpi_bus_ops *ops)
{
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);
+ 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;
+ device->bus_ops = *ops; /* workround for not call .start */
+
acpi_device_get_busid(device, handle, type);
}
break;
default:
- STRUCT_TO_INT(device->status) = 0x0F;
+ STRUCT_TO_INT(device->status) =
+ ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
+ ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
break;
}
if ((result = acpi_device_set_context(device, type)))
goto end;
- acpi_device_get_debug_info(device, handle, type);
-
- acpi_device_register(device, parent);
+ result = 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.
+ * Bind _ADR-Based Devices when hot add
*/
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;
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;
if (ops->acpi_op_add)
status = acpi_add_single_object(&child, parent,
- chandle, type);
+ chandle, type, ops);
else
status = acpi_bus_get_device(chandle, &child);
if (ACPI_FAILURE(status))
continue;
- if (ops->acpi_op_start) {
+ if (ops->acpi_op_start && !(ops->acpi_op_add)) {
status = acpi_start_single_object(child);
if (ACPI_FAILURE(status))
continue;
}
}
- return_VALUE(0);
+ return 0;
}
int
int result;
struct acpi_bus_ops ops;
- ACPI_FUNCTION_TRACE("acpi_bus_add");
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_add = 1;
- result = acpi_add_single_object(child, parent, handle, type);
- if (!result) {
- memset(&ops, 0, sizeof(ops));
- ops.acpi_op_add = 1;
+ result = acpi_add_single_object(child, parent, handle, type, &ops);
+ if (!result)
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);
-static int acpi_bus_trim(struct acpi_device *start, int rmdevice)
+int acpi_bus_trim(struct acpi_device *start, int rmdevice)
{
acpi_status status;
struct acpi_device *parent, *child;
}
return err;
}
+EXPORT_SYMBOL_GPL(acpi_bus_trim);
+
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");
+ struct acpi_bus_ops ops;
if (!root)
- return_VALUE(-ENODEV);
+ return -ENODEV;
+
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_add = 1;
+ ops.acpi_op_start = 1;
/*
* Enumerate all fixed-feature devices.
*/
- if (acpi_fadt.pwr_button == 0) {
+ if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) {
result = acpi_add_single_object(&device, acpi_root,
NULL,
- ACPI_BUS_TYPE_POWER_BUTTON);
- if (!result)
- result = acpi_start_single_object(device);
+ ACPI_BUS_TYPE_POWER_BUTTON,
+ &ops);
}
- if (acpi_fadt.sleep_button == 0) {
+ if ((acpi_gbl_FADT.flags & 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);
+ ACPI_BUS_TYPE_SLEEP_BUTTON,
+ &ops);
}
- return_VALUE(result);
+ return result;
}
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);
+ memset(&ops, 0, sizeof(ops));
+ ops.acpi_op_add = 1;
+ ops.acpi_op_start = 1;
+
+ 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_add_single_object(&acpi_root, NULL, ACPI_ROOT_OBJECT,
- ACPI_BUS_TYPE_SYSTEM);
+ ACPI_BUS_TYPE_SYSTEM, &ops);
if (result)
goto Done;
- result = acpi_start_single_object(acpi_root);
-
/*
* Enumerate devices in the ACPI namespace.
*/
result = acpi_bus_scan_fixed(acpi_root);
- if (!result) {
- memset(&ops, 0, sizeof(ops));
- ops.acpi_op_add = 1;
- ops.acpi_op_start = 1;
+ if (!result)
result = acpi_bus_scan(acpi_root, &ops);
- }
if (result)
acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
Done:
- return_VALUE(result);
+ return result;
}
subsys_initcall(acpi_scan_init);