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| author | Mark Lord <liml@rtr.ca> | 2008-05-28 12:01:12 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-05-30 12:37:24 -0400 |
| commit | b406c7a6655da7a2fcd9f72e41262f93ff707748 (patch) | |
| tree | a68f3694ad4faf542c251e1553a045ebb0574b3c /drivers/ata | |
| parent | 5cf73bfb061552aa18d816d2859409be9ace5306 (diff) | |
| download | lwn-b406c7a6655da7a2fcd9f72e41262f93ff707748.tar.gz lwn-b406c7a6655da7a2fcd9f72e41262f93ff707748.zip | |
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')
| -rw-r--r-- | drivers/ata/sata_mv.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 969a76987781..17093e600d80 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); |