Implement link powersave. sata_sil24 is mostly compliant with the
standard and standard methods can do everything other than plugging
PHY RDY changed IRQ.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/scsi/sata_sil24.c | 22 +++++++++++++++++++++-
1 files changed, 21 insertions(+), 1 deletions(-)
600172dbafec31447eaee86ca91a3aa8370fbc47
diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index 2e0f4a4..0b5c3f1 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -230,7 +230,8 @@ enum {
/* host flags */
SIL24_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
- ATA_FLAG_NCQ | ATA_FLAG_SKIP_D2H_BSY,
+ ATA_FLAG_NCQ | ATA_FLAG_SKIP_D2H_BSY |
+ ATA_FLAG_HIPS | ATA_FLAG_DIPS,
SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */
IRQ_STAT_4PORTS = 0xf,
@@ -335,6 +336,7 @@ static void sil24_freeze(struct ata_port
static void sil24_thaw(struct ata_port *ap);
static void sil24_error_handler(struct ata_port *ap);
static void sil24_post_internal_cmd(struct ata_queued_cmd *qc);
+static void sil24_set_powersave(struct ata_port *ap, int ps_state);
static int sil24_port_start(struct ata_port *ap);
static void sil24_port_stop(struct ata_port *ap);
static void sil24_host_stop(struct ata_host_set *host_set);
@@ -405,6 +407,8 @@ static const struct ata_port_operations
.error_handler = sil24_error_handler,
.post_internal_cmd = sil24_post_internal_cmd,
+ .set_powersave = sil24_set_powersave,
+
.port_start = sil24_port_start,
.port_stop = sil24_port_stop,
.host_stop = sil24_host_stop,
@@ -764,6 +768,10 @@ static void sil24_error_intr(struct ata_
irq_stat = readl(port + PORT_IRQ_STAT);
writel(irq_stat, port + PORT_IRQ_STAT);
+ /* ignore PHYRDY_CHG during dynamic powersave */
+ if (ata_ps_dynamic(ap->ps_state))
+ irq_stat &= ~PORT_IRQ_PHYRDY_CHG;
+
/* first, analyze and record host port events */
ata_ehi_clear_desc(ehi);
@@ -928,6 +936,18 @@ static void sil24_post_internal_cmd(stru
sil24_init_port(ap);
}
+static void sil24_set_powersave(struct ata_port *ap, int ps_state)
+{
+ void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
+
+ /* turn off SError.N IRQ if entering dynamic powersave mode */
+ if (ata_ps_dynamic(ps_state))
+ writel(PORT_IRQ_PHYRDY_CHG, port + PORT_IRQ_ENABLE_CLR);
+
+ /* everything else can be done with standard SCR registers */
+ sata_std_set_powersave(ap, ps_state);
+}
+
static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev)
{
const size_t cb_size = sizeof(*pp->cmd_block) * SIL24_MAX_CMDS;
--
1.3.2
-
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