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ahci: handle COMINIT received during spin-up

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Some Intel SSDs can send a COMINIT after the initial COMRESET. This causes
the link to go down and we need to re-initialize the link.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
This commit is contained in:
Rob Herring 2013-08-24 10:10:52 -05:00 committed by Tom Rini
parent 124e9fa132
commit 178210847f
1 changed files with 12 additions and 0 deletions
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12
drivers/block/ahci.c
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@ -243,8 +243,20 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
if (!(tmp & (ATA_STAT_BUSY | ATA_STAT_DRQ)))
break;
udelay(1000);
tmp = readl(port_mmio + PORT_SCR_STAT);
tmp &= PORT_SCR_STAT_DET_MASK;
if (tmp == PORT_SCR_STAT_DET_PHYRDY)
break;
j++;
}
tmp = readl(port_mmio + PORT_SCR_STAT) & PORT_SCR_STAT_DET_MASK;
if (tmp == PORT_SCR_STAT_DET_COMINIT) {
debug("SATA link %d down (COMINIT received), retrying...\n", i);
i--;
continue;
}
printf("Target spinup took %d ms.\n", j);
if (j == WAIT_MS_SPINUP)
debug("timeout.\n");