diff options
Diffstat (limited to 'drivers/ide')
| -rw-r--r-- | drivers/ide/ide-acpi.c | 42 | ||||
| -rw-r--r-- | drivers/ide/ide.c | 14 |
2 files changed, 54 insertions, 2 deletions
diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c index 17aea65..6bff81a 100644 --- a/drivers/ide/ide-acpi.c +++ b/drivers/ide/ide-acpi.c @@ -612,6 +612,46 @@ void ide_acpi_push_timing(ide_hwif_t *hwif) EXPORT_SYMBOL_GPL(ide_acpi_push_timing); /** + * ide_acpi_set_state - set the channel power state + * @hwif: target IDE interface + * @on: state, on/off + * + * This function executes the _PS0/_PS3 ACPI method to set the power state. + * ACPI spec requires _PS0 when IDE power on and _PS3 when power off + */ +void ide_acpi_set_state(ide_hwif_t *hwif, int on) +{ + int unit; + + if (ide_noacpi) + return; + + DEBPRINT("ENTER:\n"); + + if (!hwif->acpidata) { + DEBPRINT("no ACPI data for %s\n", hwif->name); + return; + } + /* channel first and then drives for power on and verse versa for power off */ + if (on) + acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; + + if (!drive->acpidata->obj_handle) + drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive); + + if (drive->acpidata->obj_handle && drive->present) { + acpi_bus_set_power(drive->acpidata->obj_handle, + on? ACPI_STATE_D0: ACPI_STATE_D3); + } + } + if (!on) + acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3); +} +EXPORT_SYMBOL_GPL(ide_acpi_set_state); + +/** * ide_acpi_init - initialize the ACPI link for an IDE interface * @hwif: target IDE interface (channel) * @@ -679,6 +719,8 @@ void ide_acpi_init(ide_hwif_t *hwif) return; } + /* ACPI _PS0 before _STM */ + ide_acpi_set_state(hwif, 1); /* * ACPI requires us to call _STM on startup */ diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c index de54306..9fdc1fe 100644 --- a/drivers/ide/ide.c +++ b/drivers/ide/ide.c @@ -915,6 +915,7 @@ static int generic_ide_suspend(struct device *dev, pm_message_t mesg) struct request rq; struct request_pm_state rqpm; ide_task_t args; + int ret; /* Call ACPI _GTM only once */ if (!(drive->dn % 2)) @@ -931,7 +932,14 @@ static int generic_ide_suspend(struct device *dev, pm_message_t mesg) mesg.event = PM_EVENT_FREEZE; rqpm.pm_state = mesg.event; - return ide_do_drive_cmd(drive, &rq, ide_wait); + ret = ide_do_drive_cmd(drive, &rq, ide_wait); + /* only call ACPI _PS3 after both drivers are suspended */ + if (!ret && (((drive->dn % 2) && hwif->drives[0].present + && hwif->drives[1].present) + || !hwif->drives[0].present + || !hwif->drives[1].present)) + ide_acpi_set_state(hwif, 0); + return ret; } static int generic_ide_resume(struct device *dev) @@ -944,8 +952,10 @@ static int generic_ide_resume(struct device *dev) int err; /* Call ACPI _STM only once */ - if (!(drive->dn % 2)) + if (!(drive->dn % 2)) { + ide_acpi_set_state(hwif, 1); ide_acpi_push_timing(hwif); + } ide_acpi_exec_tfs(drive); |