[PATCH] sata_sil: disable hotplug interrupts on two ATI IXPs
Some SATA controllers embedded in ATI IXPs seem to have broken
SATA_IRQ bit in their bmdma2 registers which is always stuck at 1.
This makes the driver believe that there has been a hotplug event and
freeze the port whenever there's an interrupt thus failing all
commands.
This patch disables SATA_IRQ for those controllers.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/scsi/sata_sil.c b/drivers/scsi/sata_sil.c
index 662ad10..51d86d7 100644
--- a/drivers/scsi/sata_sil.c
+++ b/drivers/scsi/sata_sil.c
@@ -52,6 +52,7 @@
/*
* host flags
*/
+ SIL_FLAG_NO_SATA_IRQ = (1 << 28),
SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
SIL_FLAG_MOD15WRITE = (1 << 30),
@@ -62,8 +63,9 @@
* Controller IDs
*/
sil_3112 = 0,
- sil_3512 = 1,
- sil_3114 = 2,
+ sil_3112_no_sata_irq = 1,
+ sil_3512 = 2,
+ sil_3114 = 3,
/*
* Register offsets
@@ -123,8 +125,8 @@
{ 0x1095, 0x3512, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3512 },
{ 0x1095, 0x3114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3114 },
{ 0x1002, 0x436e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
- { 0x1002, 0x4379, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
- { 0x1002, 0x437a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
+ { 0x1002, 0x4379, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112_no_sata_irq },
+ { 0x1002, 0x437a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112_no_sata_irq },
{ } /* terminate list */
};
@@ -217,6 +219,16 @@
.udma_mask = 0x3f, /* udma0-5 */
.port_ops = &sil_ops,
},
+ /* sil_3112_no_sata_irq */
+ {
+ .sht = &sil_sht,
+ .host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_MOD15WRITE |
+ SIL_FLAG_NO_SATA_IRQ,
+ .pio_mask = 0x1f, /* pio0-4 */
+ .mwdma_mask = 0x07, /* mwdma0-2 */
+ .udma_mask = 0x3f, /* udma0-5 */
+ .port_ops = &sil_ops,
+ },
/* sil_3512 */
{
.sht = &sil_sht,
@@ -437,6 +449,10 @@
if (unlikely(!ap || ap->flags & ATA_FLAG_DISABLED))
continue;
+ /* turn off SATA_IRQ if not supported */
+ if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
+ bmdma2 &= ~SIL_DMA_SATA_IRQ;
+
if (bmdma2 == 0xffffffff ||
!(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
continue;
@@ -474,8 +490,9 @@
ata_chk_status(ap);
ata_bmdma_irq_clear(ap);
- /* turn on SATA IRQ */
- writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
+ /* turn on SATA IRQ if supported */
+ if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
+ writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
/* turn on IRQ */
tmp = readl(mmio_base + SIL_SYSCFG);