static ssize_t
acpi_system_write_sleep (
struct file *file,
const char __user *buffer,
size_t count,
loff_t *ppos)
{
char str[12];
u32 state = 0;
int error = 0;
if (count > sizeof(str) - 1)
goto Done;
memset(str,0,sizeof(str));
if (copy_from_user(str, buffer, count))
return -EFAULT;
/* Check for S4 bios request */
if (!strcmp(str,"4b")) {
error = acpi_suspend(4);
goto Done;
}
state = simple_strtoul(str, NULL, 0);
#ifdef CONFIG_SOFTWARE_SUSPEND
if (state == 4) {
software_suspend();
goto Done;
}
#endif
error = acpi_suspend(state);
Done:
return error ? error : count;
}
static int
acpi_system_write_sleep (
struct file *file,
const char *buffer,
unsigned long count,
void *data)
{
acpi_status status = AE_OK;
struct acpi_system *system = (struct acpi_system *) data;
char state_string[12] = {'\0'};
u32 state = 0;
ACPI_FUNCTION_TRACE("acpi_system_write_sleep");
if (!system || (count > sizeof(state_string) - 1))
return_VALUE(-EINVAL);
if (copy_from_user(state_string, buffer, count))
return_VALUE(-EFAULT);
state_string[count] = '\0';
state = simple_strtoul(state_string, NULL, 0);
if (!system->states[state])
return_VALUE(-ENODEV);
/*
* If S4 is supported by the OS, then we should assume that
* echo 4b > /proc/acpi/sleep is for s4bios.
* Since we have only s4bios, we assume that acpi_suspend failed
* if no s4bios support.
*/
status = acpi_suspend(state);
if (ACPI_FAILURE(status))
return_VALUE(-ENODEV);
return_VALUE(count);
}
NTSTATUS
Bus_FDO_Power (
PFDO_DEVICE_DATA Data,
PIRP Irp
)
{
NTSTATUS status = STATUS_SUCCESS;
POWER_STATE powerState;
POWER_STATE_TYPE powerType;
PIO_STACK_LOCATION stack;
ULONG AcpiState;
ACPI_STATUS AcpiStatus;
SYSTEM_POWER_STATE oldPowerState;
stack = IoGetCurrentIrpStackLocation (Irp);
powerType = stack->Parameters.Power.Type;
powerState = stack->Parameters.Power.State;
if (stack->MinorFunction == IRP_MN_SET_POWER) {
DPRINT("\tRequest to set %s state to %s\n",
((powerType == SystemPowerState) ? "System" : "Device"),
((powerType == SystemPowerState) ? \
DbgSystemPowerString(powerState.SystemState) :\
DbgDevicePowerString(powerState.DeviceState)));
}
if (powerType == SystemPowerState)
{
switch (powerState.SystemState) {
case PowerSystemSleeping1:
AcpiState = ACPI_STATE_S1;
break;
case PowerSystemSleeping2:
AcpiState = ACPI_STATE_S2;
break;
case PowerSystemSleeping3:
AcpiState = ACPI_STATE_S3;
break;
case PowerSystemHibernate:
AcpiState = ACPI_STATE_S4;
break;
case PowerSystemShutdown:
AcpiState = ACPI_STATE_S5;
break;
default:
AcpiState = ACPI_STATE_UNKNOWN;
ASSERT(FALSE);
break;
}
oldPowerState = Data->Common.SystemPowerState;
Data->Common.SystemPowerState = powerState.SystemState;
AcpiStatus = acpi_suspend(AcpiState);
if (!ACPI_SUCCESS(AcpiStatus)) {
DPRINT1("Failed to enter sleep state %d (Status 0x%X)\n",
AcpiState, AcpiStatus);
Data->Common.SystemPowerState = oldPowerState;
status = STATUS_UNSUCCESSFUL;
}
}
PoStartNextPowerIrp (Irp);
IoSkipCurrentIrpStackLocation(Irp);
status = PoCallDriver (Data->NextLowerDriver, Irp);
return status;
}
