summaryrefslogtreecommitdiff
path: root/drivers/ata/libata-acpi.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ata/libata-acpi.c')
-rw-r--r--drivers/ata/libata-acpi.c76
1 files changed, 53 insertions, 23 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 97094496127e..dfd529a30c20 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -836,9 +836,11 @@ void ata_acpi_on_resume(struct ata_port *ap)
}
}
-static int ata_acpi_choose_suspend_state(struct ata_device *dev)
+static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime)
{
int d_max_in = ACPI_STATE_D3_COLD;
+ if (!runtime)
+ goto out;
/*
* For ATAPI, runtime D3 cold is only allowed
@@ -848,53 +850,81 @@ static int ata_acpi_choose_suspend_state(struct ata_device *dev)
!(zpodd_dev_enabled(dev) && zpodd_zpready(dev)))
d_max_in = ACPI_STATE_D3_HOT;
+out:
return acpi_pm_device_sleep_state(&dev->sdev->sdev_gendev,
NULL, d_max_in);
}
-/**
- * ata_acpi_set_state - set the port power state
- * @ap: target ATA port
- * @state: 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 ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
+static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state)
{
+ bool runtime = PMSG_IS_AUTO(state);
struct ata_device *dev;
acpi_handle handle;
int acpi_state;
- /* channel first and then drives for power on and vica versa
- for power off */
- handle = ata_ap_acpi_handle(ap);
- if (handle && state.event == PM_EVENT_ON)
- acpi_bus_set_power(handle, ACPI_STATE_D0);
-
ata_for_each_dev(dev, &ap->link, ENABLED) {
handle = ata_dev_acpi_handle(dev);
if (!handle)
continue;
- if (state.event != PM_EVENT_ON) {
- acpi_state = ata_acpi_choose_suspend_state(dev);
+ if (!(state.event & PM_EVENT_RESUME)) {
+ acpi_state = ata_acpi_choose_suspend_state(dev, runtime);
if (acpi_state == ACPI_STATE_D0)
continue;
- if (zpodd_dev_enabled(dev) &&
+ if (runtime && zpodd_dev_enabled(dev) &&
acpi_state == ACPI_STATE_D3_COLD)
zpodd_enable_run_wake(dev);
acpi_bus_set_power(handle, acpi_state);
} else {
- if (zpodd_dev_enabled(dev))
+ if (runtime && zpodd_dev_enabled(dev))
zpodd_disable_run_wake(dev);
acpi_bus_set_power(handle, ACPI_STATE_D0);
}
}
+}
+
+/* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */
+static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state)
+{
+ struct ata_device *dev;
+ acpi_handle port_handle;
+
+ port_handle = ata_ap_acpi_handle(ap);
+ if (!port_handle)
+ return;
+
+ /* channel first and then drives for power on and vica versa
+ for power off */
+ if (state.event & PM_EVENT_RESUME)
+ acpi_bus_set_power(port_handle, ACPI_STATE_D0);
+
+ ata_for_each_dev(dev, &ap->link, ENABLED) {
+ acpi_handle dev_handle = ata_dev_acpi_handle(dev);
+ if (!dev_handle)
+ continue;
+
+ acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ?
+ ACPI_STATE_D0 : ACPI_STATE_D3);
+ }
+
+ if (!(state.event & PM_EVENT_RESUME))
+ acpi_bus_set_power(port_handle, ACPI_STATE_D3);
+}
- handle = ata_ap_acpi_handle(ap);
- if (handle && state.event != PM_EVENT_ON)
- acpi_bus_set_power(handle, ACPI_STATE_D3);
+/**
+ * ata_acpi_set_state - set the port power state
+ * @ap: target ATA port
+ * @state: state, on/off
+ *
+ * This function sets a proper ACPI D state for the device on
+ * system and runtime PM operations.
+ */
+void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
+{
+ if (ap->flags & ATA_FLAG_ACPI_SATA)
+ sata_acpi_set_state(ap, state);
+ else
+ pata_acpi_set_state(ap, state);
}
/**