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ahci: add HFLAG_YES_FBS and apply it to 88SE9128

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88SE9128 can do FBS and sets it in HOST_CAP but forgets to set FBSCP
in PORT_CMD.  Implement AHCI_HFLAG_YES_FBS and apply it to 88SE9128.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Tejun Heo
2010-07-24 16:53:48 +02:00
committed by Jeff Garzik
parent 6d981b9a91
commit 5f173107ec
3 changed files with 26 additions and 2 deletions
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drivers/ata/libahci.c
+14 -2
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@@ -430,6 +430,12 @@ void ahci_save_initial_config(struct device *dev,
cap &= ~HOST_CAP_SNTF;
}
if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) {
dev_printk(KERN_INFO, dev,
"controller can do FBS, turning on CAP_FBS\n");
cap |= HOST_CAP_FBS;
}
if (force_port_map && port_map != force_port_map) {
dev_printk(KERN_INFO, dev, "forcing port_map 0x%x -> 0x%x\n",
port_map, force_port_map);
@@ -2036,9 +2042,15 @@ static int ahci_port_start(struct ata_port *ap)
u32 cmd = readl(port_mmio + PORT_CMD);
if (cmd & PORT_CMD_FBSCP)
pp->fbs_supported = true;
else
else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
dev_printk(KERN_INFO, dev,
"port %d can do FBS, forcing FBSCP\n",
ap->port_no);
pp->fbs_supported = true;
} else
dev_printk(KERN_WARNING, dev,
"The port is not capable of FBS\n");
"port %d is not capable of FBS\n",
ap->port_no);
}
if (pp->fbs_supported) {