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sata_mv: PHY_MODEx errata fixes

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Fix and update the errata handling for the PHY_MODEx registers.
This improves receiver noise tolerance, among other things.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mark Lord 2008-05-27 17:56:31 -04:00 committed by Jeff Garzik
parent 1f39847255
commit 8c30a8b9b5
1 changed files with 12 additions and 12 deletions
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24
drivers/ata/sata_mv.c
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@ -2546,7 +2546,7 @@ static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
int fix_phy_mode4 =
hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
u32 m2, tmp;
u32 m2, m3;
if (fix_phy_mode2) {
m2 = readl(port_mmio + PHY_MODE2);
@ -2563,27 +2563,27 @@ static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
udelay(200);
}
/* who knows what this magic does */
tmp = readl(port_mmio + PHY_MODE3);
tmp &= ~0x7F800000;
tmp |= 0x2A800000;
writel(tmp, port_mmio + PHY_MODE3);
/*
* Gen-II/IIe PHY_MODE3 errata RM#2:
* Achieves better receiver noise performance than the h/w default:
*/
m3 = readl(port_mmio + PHY_MODE3);
m3 = (m3 & 0x1f) | (0x5555601 << 5);
writel(m3, port_mmio + PHY_MODE3);
if (fix_phy_mode4) {
u32 m4;
m4 = readl(port_mmio + PHY_MODE4);
if (hp_flags & MV_HP_ERRATA_60X1B2)
tmp = readl(port_mmio + PHY_MODE3);
/* workaround for errata FEr SATA#10 (part 1) */
m4 = (m4 & ~(1 << 1)) | (1 << 0);
writel(m4, port_mmio + PHY_MODE4);
/* enforce bit restrictions on GenIIe devices */
if (IS_GEN_IIE(hpriv))
m4 = (m4 & ~0x5DE3FFFC) | (1 << 2);
if (hp_flags & MV_HP_ERRATA_60X1B2)
writel(tmp, port_mmio + PHY_MODE3);
writel(m4, port_mmio + PHY_MODE4);
}
/* Revert values of pre-emphasis and signal amps to the saved ones */