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sata_mv errata workaround for sata25 part 1

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Part 1 of workaround for errata "sata#25" for the 60x1 series
(the second half of this errata workaround is still in development.

Bit22 of the GPIO port has to be set "on" when in NCQ mode.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Mark Lord 2008-05-02 02:10:56 -04:00 committed by Jeff Garzik
parent 3e4a139107
commit dd2890f60f
1 changed files with 18 additions and 2 deletions
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20
drivers/ata/sata_mv.c
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@ -1151,6 +1151,21 @@ static void mv_config_fbs(void __iomem *port_mmio, int enable_fbs)
writelfl(new_ltmode, port_mmio + LTMODE_OFS);
}
static void mv_60x1_errata_sata25(struct ata_port *ap, int want_ncq)
{
struct mv_host_priv *hpriv = ap->host->private_data;
u32 old, new;
/* workaround for 88SX60x1 FEr SATA#25 (part 1) */
old = readl(hpriv->base + MV_GPIO_PORT_CTL_OFS);
if (want_ncq)
new = old | (1 << 22);
else
new = old & ~(1 << 22);
if (new != old)
writel(new, hpriv->base + MV_GPIO_PORT_CTL_OFS);
}
static void mv_edma_cfg(struct ata_port *ap, int want_ncq)
{
u32 cfg;
@ -1164,10 +1179,11 @@ static void mv_edma_cfg(struct ata_port *ap, int want_ncq)
if (IS_GEN_I(hpriv))
cfg |= (1 << 8); /* enab config burst size mask */
else if (IS_GEN_II(hpriv))
else if (IS_GEN_II(hpriv)) {
cfg |= EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN;
mv_60x1_errata_sata25(ap, want_ncq);
else if (IS_GEN_IIE(hpriv)) {
} else if (IS_GEN_IIE(hpriv)) {
cfg |= (1 << 23); /* do not mask PM field in rx'd FIS */
cfg |= (1 << 22); /* enab 4-entry host queue cache */
if (HAS_PCI(ap->host))