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sata_sil24: separate out sil24_exec_polled_cmd() 

Separate out sil24_exec_polled_cmd() from sil24_softreset().  This
will be used to implement sil24_pmp_read/write().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-07-16 14:29:39 +09:00 committed by Jeff Garzik
parent e59f0dad33
commit 37b99cba8c
1 changed files with 56 additions and 20 deletions
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74
drivers/ata/sata_sil24.c
View File

@ -531,16 +531,60 @@ static int sil24_init_port(struct ata_port *ap)
return 0;
}
static int sil24_softreset(struct ata_port *ap, unsigned int *class,
unsigned long deadline)
static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
const struct ata_taskfile *tf,
int is_cmd, u32 ctrl,
unsigned long timeout_msec)
{
void __iomem *port = ap->ioaddr.cmd_addr;
struct sil24_port_priv *pp = ap->private_data;
struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
dma_addr_t paddr = pp->cmd_block_dma;
u32 irq_enabled, irq_mask, irq_stat;
int rc;
prb->ctrl = cpu_to_le16(ctrl);
ata_tf_to_fis(tf, pmp, is_cmd, prb->fis);
/* temporarily plug completion and error interrupts */
irq_enabled = readl(port + PORT_IRQ_ENABLE_SET);
writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR);
writel((u32)paddr, port + PORT_CMD_ACTIVATE);
writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
irq_stat = ata_wait_register(port + PORT_IRQ_STAT, irq_mask, 0x0,
10, timeout_msec);
writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */
irq_stat >>= PORT_IRQ_RAW_SHIFT;
if (irq_stat & PORT_IRQ_COMPLETE)
rc = 0;
else {
/* force port into known state */
sil24_init_port(ap);
if (irq_stat & PORT_IRQ_ERROR)
rc = -EIO;
else
rc = -EBUSY;
}
/* restore IRQ enabled */
writel(irq_enabled, port + PORT_IRQ_ENABLE_SET);
return rc;
}
static int sil24_softreset(struct ata_port *ap, unsigned int *class,
unsigned long deadline)
{
unsigned long timeout_msec = 0;
struct ata_taskfile tf;
u32 mask, irq_stat;
const char *reason;
int rc;
DPRINTK("ENTER\n");
@ -557,25 +601,17 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
}
/* do SRST */
prb->ctrl = cpu_to_le16(PRB_CTRL_SRST);
prb->fis[1] = 0; /* no PMP yet */
if (time_after(deadline, jiffies))
timeout_msec = jiffies_to_msecs(deadline - jiffies);
writel((u32)paddr, port + PORT_CMD_ACTIVATE);
writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
irq_stat = ata_wait_register(port + PORT_IRQ_STAT, mask, 0x0,
100, jiffies_to_msecs(deadline - jiffies));
writel(irq_stat, port + PORT_IRQ_STAT); /* clear IRQs */
irq_stat >>= PORT_IRQ_RAW_SHIFT;
if (!(irq_stat & PORT_IRQ_COMPLETE)) {
if (irq_stat & PORT_IRQ_ERROR)
reason = "SRST command error";
else
ata_tf_init(ap->device, &tf); /* doesn't really matter */
rc = sil24_exec_polled_cmd(ap, 0, &tf, 0, PRB_CTRL_SRST, timeout_msec);
if (rc == -EBUSY) {
reason = "timeout";
goto err;
} else if (rc) {
reason = "SRST command error";
goto err;
}
sil24_read_tf(ap, 0, &tf);