#include <linux/module.h>
#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/signal.h>
#define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent)
+static const char *dummy_hid = "device";
+
static LIST_HEAD(acpi_device_list);
static LIST_HEAD(acpi_bus_id_list);
DEFINE_MUTEX(acpi_device_lock);
int count;
struct acpi_hardware_id *id;
+ if (list_empty(&acpi_dev->pnp.ids))
+ return 0;
+
len = snprintf(modalias, size, "acpi:");
size -= len;
goto end;
}
- result = device_create_file(&dev->dev, &dev_attr_hid);
- if (result)
- goto end;
+ if (!list_empty(&dev->pnp.ids)) {
+ result = device_create_file(&dev->dev, &dev_attr_hid);
+ if (result)
+ goto end;
- result = device_create_file(&dev->dev, &dev_attr_modalias);
- if (result)
- goto end;
+ result = device_create_file(&dev->dev, &dev_attr_modalias);
+ if (result)
+ goto end;
+ }
#ifdef CONFIG_PCI_GUESTDEV
if(dev->pnp.unique_id) {
struct acpi_device *acpi_dev = to_acpi_device(dev);
int len;
+ if (list_empty(&acpi_dev->pnp.ids))
+ return 0;
+
if (add_uevent_var(env, "MODALIAS="))
return -ENOMEM;
len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],
}
static acpi_status
-acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device,
- union acpi_object *package)
+acpi_bus_extract_wakeup_device_power_package(acpi_handle handle,
+ struct acpi_device_wakeup *wakeup)
{
- int i = 0;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *package = NULL;
union acpi_object *element = NULL;
+ acpi_status status;
+ int i = 0;
- if (!device || !package || (package->package.count < 2))
+ if (!wakeup)
return AE_BAD_PARAMETER;
+ /* _PRW */
+ status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
+ return status;
+ }
+
+ package = (union acpi_object *)buffer.pointer;
+
+ if (!package || (package->package.count < 2)) {
+ status = AE_BAD_DATA;
+ goto out;
+ }
+
element = &(package->package.elements[0]);
- if (!element)
- return AE_BAD_PARAMETER;
+ if (!element) {
+ status = AE_BAD_DATA;
+ goto out;
+ }
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[1].type != ACPI_TYPE_INTEGER)) {
+ status = AE_BAD_DATA;
+ goto out;
+ }
+ wakeup->gpe_device =
element->package.elements[0].reference.handle;
- device->wakeup.gpe_number =
+ 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;
+ wakeup->gpe_device = NULL;
+ wakeup->gpe_number = element->integer.value;
+ } else {
+ status = AE_BAD_DATA;
+ goto out;
+ }
element = &(package->package.elements[1]);
if (element->type != ACPI_TYPE_INTEGER) {
- return AE_BAD_DATA;
+ status = AE_BAD_DATA;
+ goto out;
}
- device->wakeup.sleep_state = element->integer.value;
+ wakeup->sleep_state = element->integer.value;
if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
- return AE_NO_MEMORY;
+ status = AE_NO_MEMORY;
+ goto out;
}
- device->wakeup.resources.count = package->package.count - 2;
- for (i = 0; i < device->wakeup.resources.count; i++) {
+ wakeup->resources.count = package->package.count - 2;
+ for (i = 0; i < wakeup->resources.count; i++) {
element = &(package->package.elements[i + 2]);
- if (element->type != ACPI_TYPE_LOCAL_REFERENCE)
- return AE_BAD_DATA;
+ if (element->type != ACPI_TYPE_LOCAL_REFERENCE) {
+ status = AE_BAD_DATA;
+ goto out;
+ }
- device->wakeup.resources.handles[i] = element->reference.handle;
+ wakeup->resources.handles[i] = element->reference.handle;
}
- return AE_OK;
+ acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number);
+
+ out:
+ kfree(buffer.pointer);
+
+ return status;
}
static void acpi_bus_set_run_wake_flags(struct acpi_device *device)
acpi_status status;
acpi_event_status event_status;
- device->wakeup.run_wake_count = 0;
device->wakeup.flags.notifier_present = 0;
/* Power button, Lid switch always enable wakeup */
if (!acpi_match_device_ids(device, button_device_ids)) {
device->wakeup.flags.run_wake = 1;
- device->wakeup.flags.always_enabled = 1;
+ device_set_wakeup_capable(&device->dev, true);
return;
}
- status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number,
- ACPI_NOT_ISR, &event_status);
+ status = acpi_get_gpe_status(device->wakeup.gpe_device,
+ device->wakeup.gpe_number,
+ &event_status);
if (status == AE_OK)
device->wakeup.flags.run_wake =
!!(event_status & ACPI_EVENT_FLAG_HANDLE);
}
-static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
+static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
{
+ acpi_handle temp;
acpi_status status = 0;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- union acpi_object *package = NULL;
int psw_error;
- /* _PRW */
- status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer);
- if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW"));
- goto end;
- }
+ /* Presence of _PRW indicates wake capable */
+ status = acpi_get_handle(device->handle, "_PRW", &temp);
+ if (ACPI_FAILURE(status))
+ return;
- package = (union acpi_object *)buffer.pointer;
- status = acpi_bus_extract_wakeup_device_power_package(device, package);
+ status = acpi_bus_extract_wakeup_device_power_package(device->handle,
+ &device->wakeup);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
- goto end;
+ return;
}
- kfree(buffer.pointer);
-
device->wakeup.flags.valid = 1;
device->wakeup.prepare_count = 0;
acpi_bus_set_run_wake_flags(device);
if (psw_error)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"error in _DSW or _PSW evaluation\n"));
-
-end:
- if (ACPI_FAILURE(status))
- device->flags.wake_capable = 0;
- return 0;
}
+static void acpi_bus_add_power_resource(acpi_handle handle);
+
static int acpi_bus_get_power_flags(struct acpi_device *device)
{
acpi_status status = 0;
/*
* Enumerate supported power management states
*/
- for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) {
+ for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
struct acpi_device_power_state *ps = &device->power.states[i];
char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' };
acpi_evaluate_reference(device->handle, object_name, NULL,
&ps->resources);
if (ps->resources.count) {
+ int j;
+
device->power.flags.power_resources = 1;
- ps->flags.valid = 1;
+ for (j = 0; j < ps->resources.count; j++)
+ acpi_bus_add_power_resource(ps->resources.handles[j]);
}
/* 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)) {
+ 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)
+ /*
+ * State is valid if there are means to put the device into it.
+ * D3hot is only valid if _PR3 present.
+ */
+ if (ps->resources.count ||
+ (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT))
ps->flags.valid = 1;
ps->power = -1; /* Unknown - driver assigned */
device->power.states[ACPI_STATE_D3].flags.valid = 1;
device->power.states[ACPI_STATE_D3].power = 0;
- /* TBD: System wake support and resource requirements. */
+ /* Set D3cold's explicit_set flag if _PS3 exists. */
+ if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set)
+ device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1;
- device->power.state = ACPI_STATE_UNKNOWN;
- acpi_bus_get_power(device->handle, &(device->power.state));
+ acpi_bus_init_power(device);
return 0;
}
if (ACPI_SUCCESS(status))
device->flags.lockable = 1;
+ /* Power resources cannot be power manageable. */
+ if (device->device_type == ACPI_BUS_TYPE_POWER)
+ return 0;
+
/* Presence of _PS0|_PR0 indicates 'power manageable' */
status = acpi_get_handle(device->handle, "_PS0", &temp);
if (ACPI_FAILURE(status))
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: Performance management */
return 0;
return acpi_get_handle(device->handle, "_DCK", &tmp);
}
-char *acpi_device_hid(struct acpi_device *device)
+const char *acpi_device_hid(struct acpi_device *device)
{
struct acpi_hardware_id *hid;
+ if (list_empty(&device->pnp.ids))
+ return dummy_hid;
+
hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list);
return hid->id;
}
if (!id)
return;
- id->id = kmalloc(strlen(dev_id) + 1, GFP_KERNEL);
+ id->id = kstrdup(dev_id, GFP_KERNEL);
if (!id->id) {
kfree(id);
return;
}
- strcpy(id->id, dev_id);
list_add_tail(&id->list, &device->pnp.ids);
}
if (ACPI_IS_ROOT_DEVICE(device)) {
acpi_add_id(device, ACPI_SYSTEM_HID);
break;
- } else if (ACPI_IS_ROOT_DEVICE(device->parent)) {
- /* \_SB_, the only root-level namespace device */
- acpi_add_id(device, ACPI_BUS_HID);
- strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
- strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
- break;
}
status = acpi_get_object_info(device->handle, &info);
acpi_add_id(device, ACPI_DOCK_HID);
else if (!acpi_ibm_smbus_match(device))
acpi_add_id(device, ACPI_SMBUS_IBM_HID);
+ else if (!acpi_device_hid(device) &&
+ ACPI_IS_ROOT_DEVICE(device->parent)) {
+ acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */
+ strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
+ strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
+ }
break;
case ACPI_BUS_TYPE_POWER:
acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF);
break;
}
-
- /*
- * We build acpi_devices for some objects that don't have _HID or _CID,
- * e.g., PCI bridges and slots. Drivers can't bind to these objects,
- * but we do use them indirectly by traversing the acpi_device tree.
- * This generic ID isn't useful for driver binding, but it provides
- * the useful property that "every acpi_device has an ID."
- */
- if (list_empty(&device->pnp.ids))
- acpi_add_id(device, "device");
}
static int acpi_device_set_context(struct acpi_device *device)
* Wakeup device management
*-----------------------
*/
- if (device->flags.wake_capable) {
- result = acpi_bus_get_wakeup_device_flags(device);
- if (result)
- goto end;
- }
+ acpi_bus_get_wakeup_device_flags(device);
/*
* Performance Management
#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
+static void acpi_bus_add_power_resource(acpi_handle handle)
+{
+ struct acpi_bus_ops ops = {
+ .acpi_op_add = 1,
+ .acpi_op_start = 1,
+ };
+ struct acpi_device *device = NULL;
+
+ acpi_bus_get_device(handle, &device);
+ if (!device)
+ acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER,
+ ACPI_STA_DEFAULT, &ops);
+}
+
static int acpi_bus_type_and_status(acpi_handle handle, int *type,
unsigned long long *sta)
{
return AE_OK;
if (!(sta & ACPI_STA_DEVICE_PRESENT) &&
- !(sta & ACPI_STA_DEVICE_FUNCTIONING))
+ !(sta & ACPI_STA_DEVICE_FUNCTIONING)) {
+ struct acpi_device_wakeup wakeup;
+ acpi_handle temp;
+
+ status = acpi_get_handle(handle, "_PRW", &temp);
+ if (ACPI_SUCCESS(status))
+ acpi_bus_extract_wakeup_device_power_package(handle,
+ &wakeup);
return AE_CTRL_DEPTH;
+ }
/*
* We may already have an acpi_device from a previous enumeration. If
int acpi_bus_start(struct acpi_device *device)
{
struct acpi_bus_ops ops;
+ int result;
if (!device)
return -EINVAL;
memset(&ops, 0, sizeof(ops));
ops.acpi_op_start = 1;
- return acpi_bus_scan(device->handle, &ops, NULL);
+ result = acpi_bus_scan(device->handle, &ops, NULL);
+
+ acpi_update_all_gpes();
+
+ return result;
}
EXPORT_SYMBOL(acpi_bus_start);
printk(KERN_ERR PREFIX "Could not register bus type\n");
}
+ acpi_power_init();
+
/*
* Enumerate devices in the ACPI namespace.
*/
if (result)
acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL);
+ else
+ acpi_update_all_gpes();
return result;
}
projects / linux-flexiantxendom0-3.2.10.git / blobdiff