diff options
Diffstat (limited to 'drivers/acpi/bus.c')
| -rw-r--r-- | drivers/acpi/bus.c | 153 |
1 files changed, 81 insertions, 72 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index d68bd61072bb..7ced61f39492 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -52,22 +52,6 @@ EXPORT_SYMBOL(acpi_root_dir); #define STRUCT_TO_INT(s) (*((int*)&s)) -static int set_power_nocheck(const struct dmi_system_id *id) -{ - printk(KERN_NOTICE PREFIX "%s detected - " - "disable power check in power transition\n", id->ident); - acpi_power_nocheck = 1; - return 0; -} -static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { - { - set_power_nocheck, "HP Pavilion 05", { - DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), - DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), - DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, - {}, -}; - #ifdef CONFIG_X86 static int set_copy_dsdt(const struct dmi_system_id *id) @@ -196,33 +180,24 @@ EXPORT_SYMBOL(acpi_bus_get_private_data); Power Management -------------------------------------------------------------------------- */ -int acpi_bus_get_power(acpi_handle handle, int *state) +static int __acpi_bus_get_power(struct acpi_device *device, int *state) { int result = 0; acpi_status status = 0; - struct acpi_device *device = NULL; unsigned long long psc = 0; - - result = acpi_bus_get_device(handle, &device); - if (result) - return result; + if (!device || !state) + return -EINVAL; *state = ACPI_STATE_UNKNOWN; - if (!device->flags.power_manageable) { - /* TBD: Non-recursive algorithm for walking up hierarchy */ - if (device->parent) - *state = device->parent->power.state; - else - *state = ACPI_STATE_D0; - } else { + if (device->flags.power_manageable) { /* * Get the device's power state either directly (via _PSC) or * indirectly (via power resources). */ if (device->power.flags.power_resources) { - result = acpi_power_get_inferred_state(device); + result = acpi_power_get_inferred_state(device, state); if (result) return result; } else if (device->power.flags.explicit_get) { @@ -230,59 +205,33 @@ int acpi_bus_get_power(acpi_handle handle, int *state) NULL, &psc); if (ACPI_FAILURE(status)) return -ENODEV; - device->power.state = (int)psc; + *state = (int)psc; } - - *state = device->power.state; + } else { + /* TBD: Non-recursive algorithm for walking up hierarchy. */ + *state = device->parent ? + device->parent->power.state : ACPI_STATE_D0; } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", - device->pnp.bus_id, device->power.state)); + device->pnp.bus_id, *state)); return 0; } -EXPORT_SYMBOL(acpi_bus_get_power); -int acpi_bus_set_power(acpi_handle handle, int state) +static int __acpi_bus_set_power(struct acpi_device *device, int state) { int result = 0; acpi_status status = AE_OK; - struct acpi_device *device = NULL; char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; - - result = acpi_bus_get_device(handle, &device); - if (result) - return result; - - if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) + if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) return -EINVAL; /* Make sure this is a valid target state */ - if (!device->flags.power_manageable) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", - kobject_name(&device->dev.kobj))); - return -ENODEV; - } - /* - * Get device's current power state - */ - if (!acpi_power_nocheck) { - /* - * Maybe the incorrect power state is returned on the bogus - * bios, which is different with the real power state. - * For example: the bios returns D0 state and the real power - * state is D3. OS expects to set the device to D0 state. In - * such case if OS uses the power state returned by the BIOS, - * the device can't be transisted to the correct power state. - * So if the acpi_power_nocheck is set, it is unnecessary to - * get the power state by calling acpi_bus_get_power. - */ - acpi_bus_get_power(device->handle, &device->power.state); - } - if ((state == device->power.state) && !device->flags.force_power_state) { + if (state == device->power.state) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", state)); return 0; @@ -351,8 +300,75 @@ int acpi_bus_set_power(acpi_handle handle, int state) return result; } + +int acpi_bus_set_power(acpi_handle handle, int state) +{ + struct acpi_device *device; + int result; + + result = acpi_bus_get_device(handle, &device); + if (result) + return result; + + if (!device->flags.power_manageable) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Device [%s] is not power manageable\n", + dev_name(&device->dev))); + return -ENODEV; + } + + return __acpi_bus_set_power(device, state); +} EXPORT_SYMBOL(acpi_bus_set_power); + +int acpi_bus_init_power(struct acpi_device *device) +{ + int state; + int result; + + if (!device) + return -EINVAL; + + device->power.state = ACPI_STATE_UNKNOWN; + + result = __acpi_bus_get_power(device, &state); + if (result) + return result; + + if (device->power.flags.power_resources) + result = acpi_power_on_resources(device, state); + + if (!result) + device->power.state = state; + + return result; +} + + +int acpi_bus_update_power(acpi_handle handle, int *state_p) +{ + struct acpi_device *device; + int state; + int result; + + result = acpi_bus_get_device(handle, &device); + if (result) + return result; + + result = __acpi_bus_get_power(device, &state); + if (result) + return result; + + result = __acpi_bus_set_power(device, state); + if (!result && state_p) + *state_p = state; + + return result; +} +EXPORT_SYMBOL_GPL(acpi_bus_update_power); + + bool acpi_bus_power_manageable(acpi_handle handle) { struct acpi_device *device; @@ -1023,15 +1039,8 @@ static int __init acpi_init(void) if (acpi_disabled) return result; - /* - * If the laptop falls into the DMI check table, the power state check - * will be disabled in the course of device power transition. - */ - dmi_check_system(power_nocheck_dmi_table); - acpi_scan_init(); acpi_ec_init(); - acpi_power_init(); acpi_debugfs_init(); acpi_sleep_proc_init(); acpi_wakeup_device_init(); |