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[PATCH] ahci: separate out ahci_stop/start_engine

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Separate out ahci_stop/start_engine().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Tejun Heo 2005-12-19 22:36:34 +09:00 committed by Jeff Garzik
parent 3be680b732
commit 7c76d1e839
1 changed files with 39 additions and 19 deletions
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58
drivers/scsi/ahci.c
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@ -446,6 +446,43 @@ static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
}
static int ahci_stop_engine(struct ata_port *ap)
{
void __iomem *mmio = ap->host_set->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
int work;
u32 tmp;
tmp = readl(port_mmio + PORT_CMD);
tmp &= ~PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
/* wait for engine to stop. TODO: this could be
* as long as 500 msec
*/
work = 1000;
while (work-- > 0) {
tmp = readl(port_mmio + PORT_CMD);
if ((tmp & PORT_CMD_LIST_ON) == 0)
return 0;
udelay(10);
}
return -EIO;
}
static void ahci_start_engine(struct ata_port *ap)
{
void __iomem *mmio = ap->host_set->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
u32 tmp;
tmp = readl(port_mmio + PORT_CMD);
tmp |= PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* flush */
}
static void ahci_phy_reset(struct ata_port *ap)
{
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
@ -572,7 +609,6 @@ static void ahci_restart_port(struct ata_port *ap, u32 irq_stat)
void __iomem *mmio = ap->host_set->mmio_base;
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
u32 tmp;
int work;
if ((ap->device[0].class != ATA_DEV_ATAPI) ||
((irq_stat & PORT_IRQ_TF_ERR) == 0))
@ -588,20 +624,7 @@ static void ahci_restart_port(struct ata_port *ap, u32 irq_stat)
readl(port_mmio + PORT_SCR_ERR));
/* stop DMA */
tmp = readl(port_mmio + PORT_CMD);
tmp &= ~PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
/* wait for engine to stop. TODO: this could be
* as long as 500 msec
*/
work = 1000;
while (work-- > 0) {
tmp = readl(port_mmio + PORT_CMD);
if ((tmp & PORT_CMD_LIST_ON) == 0)
break;
udelay(10);
}
ahci_stop_engine(ap);
/* clear SATA phy error, if any */
tmp = readl(port_mmio + PORT_SCR_ERR);
@ -620,10 +643,7 @@ static void ahci_restart_port(struct ata_port *ap, u32 irq_stat)
}
/* re-start DMA */
tmp = readl(port_mmio + PORT_CMD);
tmp |= PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* flush */
ahci_start_engine(ap);
}
static void ahci_eng_timeout(struct ata_port *ap)