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sata_mv: PHY_MODEx errata fixes
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>
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1 changed files with 12 additions and 12 deletions
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@ -2546,7 +2546,7 @@ static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
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hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
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int fix_phy_mode4 =
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hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
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u32 m2, tmp;
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u32 m2, m3;
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if (fix_phy_mode2) {
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m2 = readl(port_mmio + PHY_MODE2);
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@ -2563,27 +2563,27 @@ static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
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udelay(200);
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}
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/* who knows what this magic does */
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tmp = readl(port_mmio + PHY_MODE3);
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tmp &= ~0x7F800000;
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tmp |= 0x2A800000;
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writel(tmp, port_mmio + PHY_MODE3);
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/*
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* Gen-II/IIe PHY_MODE3 errata RM#2:
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* Achieves better receiver noise performance than the h/w default:
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*/
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m3 = readl(port_mmio + PHY_MODE3);
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m3 = (m3 & 0x1f) | (0x5555601 << 5);
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writel(m3, port_mmio + PHY_MODE3);
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if (fix_phy_mode4) {
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u32 m4;
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m4 = readl(port_mmio + PHY_MODE4);
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if (hp_flags & MV_HP_ERRATA_60X1B2)
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tmp = readl(port_mmio + PHY_MODE3);
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/* workaround for errata FEr SATA#10 (part 1) */
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m4 = (m4 & ~(1 << 1)) | (1 << 0);
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writel(m4, port_mmio + PHY_MODE4);
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/* enforce bit restrictions on GenIIe devices */
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if (IS_GEN_IIE(hpriv))
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m4 = (m4 & ~0x5DE3FFFC) | (1 << 2);
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if (hp_flags & MV_HP_ERRATA_60X1B2)
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writel(tmp, port_mmio + PHY_MODE3);
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writel(m4, port_mmio + PHY_MODE4);
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}
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/* Revert values of pre-emphasis and signal amps to the saved ones */
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