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authorMark Lord <liml@rtr.ca>2008-05-28 12:01:12 -0400
committerJeff Garzik <jgarzik@redhat.com>2008-05-30 12:37:24 -0400
commitb406c7a6655da7a2fcd9f72e41262f93ff707748 (patch)
treea68f3694ad4faf542c251e1553a045ebb0574b3c /drivers/ata/sata_mv.c
parent5cf73bfb061552aa18d816d2859409be9ace5306 (diff)
sata_mv: workaround for 60x1 errata sata13
The "B2" variant of the 6041/6081 (genII) chips requires that the PHY_MODE3 register be rewritten after any write to PHY_MODE4. This fixes a regression introduced by an earlier patch. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/sata_mv.c')
-rw-r--r--drivers/ata/sata_mv.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 969a7698778..17093e600d8 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -72,7 +72,7 @@
#include <linux/libata.h>
#define DRV_NAME "sata_mv"
-#define DRV_VERSION "1.22"
+#define DRV_VERSION "1.23"
enum {
/* BAR's are enumerated in terms of pci_resource_start() terms */
@@ -2557,7 +2557,6 @@ static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
*/
m3 = readl(port_mmio + PHY_MODE3);
m3 = (m3 & 0x1f) | (0x5555601 << 5);
- writel(m3, port_mmio + PHY_MODE3);
if (fix_phy_mode4) {
u32 m4;
@@ -2573,6 +2572,12 @@ static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
writel(m4, port_mmio + PHY_MODE4);
}
+ /*
+ * Workaround for 60x1-B2 errata SATA#13:
+ * Any write to PHY_MODE4 (above) may corrupt PHY_MODE3,
+ * so we must always rewrite PHY_MODE3 after PHY_MODE4.
+ */
+ writel(m3, port_mmio + PHY_MODE3);
/* Revert values of pre-emphasis and signal amps to the saved ones */
m2 = readl(port_mmio + PHY_MODE2);