On Fri, 2007-09-21 at 11:20 +0900, Tejun Heo wrote:
> Hello,
>
> Shaohua Li wrote:
> > + /* channel first and then drives for power on and verse versa for power
> > off */
> > + if (state.event == PM_EVENT_ON)
> > + acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
> > +
> > + if (ap->flags & ATA_FLAG_SLAVE_POSS)
> > + max_devices++;
>
> ata_port_max_devices()?
ok, fixed.
>
> > Index: linux/drivers/ata/libata-eh.c
> > ===================================================================
> > --- linux.orig/drivers/ata/libata-eh.c 2007-09-14 10:28:25.000000000
> > +0800
> > +++ linux/drivers/ata/libata-eh.c 2007-09-21 08:56:40.000000000 +0800
> > @@ -2349,6 +2349,7 @@ static void ata_eh_handle_port_suspend(s
> > if (ap->ops->port_suspend)
> > rc = ap->ops->port_suspend(ap, ap->pm_mesg);
> >
> > + ata_acpi_set_state(ap, PMSG_SUSPEND);
> > out:
> > /* report result */
> > spin_lock_irqsave(ap->lock, flags);
> > @@ -2394,6 +2395,8 @@ static void ata_eh_handle_port_resume(st
> >
> > WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED));
> >
> > + ata_acpi_set_state(ap, PMSG_ON);
> > +
> > if (ap->ops->port_resume)
> > rc = ap->ops->port_resume(ap);
>
> Can these be moved into ata_acpi_on_suspend() and ata_acpi_on_resume()?
> Or do they have to be placed on the other side of ->port_suspend/resume
> callbacks?
I suppose _PSx will shutdown ports. So I want to do PS3 as later as
possible in suspend, and vice versa in resume.
Thanks,
Shaohua
---
drivers/ata/libata-acpi.c | 34 ++++++++++++++++++++++++++++++++++
drivers/ata/libata-eh.c | 3 +++
drivers/ata/libata.h | 2 ++
3 files changed, 39 insertions(+)
Index: linux/drivers/ata/libata-acpi.c
===================================================================
--- linux.orig/drivers/ata/libata-acpi.c 2007-09-21 09:23:13.000000000
+0800
+++ linux/drivers/ata/libata-acpi.c 2007-09-21 10:13:32.000000000 +0800
@@ -523,6 +523,39 @@ void ata_acpi_on_resume(struct ata_port
}
/**
+ * 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)
+{
+ int max_devices, i;
+
+ if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA))
+ return;
+
+ /* channel first and then drives for power on and verse versa for power
off */
+ if (state.event == PM_EVENT_ON)
+ acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
+
+ max_devices = ata_port_max_devices(ap);
+
+ for (i = 0; i < max_devices; ++i) {
+ struct ata_device *dev = &ap->device[i];
+
+ if (dev->acpi_handle)
+ acpi_bus_set_power(dev->acpi_handle,
+ state.event == PM_EVENT_ON ?
+ ACPI_STATE_D0: ACPI_STATE_D3);
+ }
+ if (state.event != PM_EVENT_ON)
+ acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3);
+}
+
+/**
* ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
* @dev: target ATA device
*
Index: linux/drivers/ata/libata-eh.c
===================================================================
--- linux.orig/drivers/ata/libata-eh.c 2007-09-21 09:23:13.000000000 +0800
+++ linux/drivers/ata/libata-eh.c 2007-09-21 10:09:10.000000000 +0800
@@ -2349,6 +2349,7 @@ static void ata_eh_handle_port_suspend(s
if (ap->ops->port_suspend)
rc = ap->ops->port_suspend(ap, ap->pm_mesg);
+ ata_acpi_set_state(ap, PMSG_SUSPEND);
out:
/* report result */
spin_lock_irqsave(ap->lock, flags);
@@ -2394,6 +2395,8 @@ static void ata_eh_handle_port_resume(st
WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED));
+ ata_acpi_set_state(ap, PMSG_ON);
+
if (ap->ops->port_resume)
rc = ap->ops->port_resume(ap);
Index: linux/drivers/ata/libata.h
===================================================================
--- linux.orig/drivers/ata/libata.h 2007-09-21 09:23:13.000000000 +0800
+++ linux/drivers/ata/libata.h 2007-09-21 10:09:10.000000000 +0800
@@ -102,11 +102,13 @@ extern void ata_acpi_associate(struct at
extern int ata_acpi_on_suspend(struct ata_port *ap);
extern void ata_acpi_on_resume(struct ata_port *ap);
extern int ata_acpi_on_devcfg(struct ata_device *adev);
+extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);
#else
static inline void ata_acpi_associate(struct ata_host *host) { }
static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
static inline void ata_acpi_on_resume(struct ata_port *ap) { }
static inline int ata_acpi_on_devcfg(struct ata_device *adev) { return 0; }
+static inline void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
{ }
#endif
/* libata-scsi.c */
-
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