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[PATCH] sil24: use SRST for phy_reset

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There seems to be no way to obtain device signature from sil24 after
SATA phy reset and SRST is needed anyway for later port multiplier
suppport.  This patch converts sil24_phy_reset to use SRST instaed.

Signed-off-by: Tejun Heo <htejun@gmail.com>

--

Jeff, I didn't remove the 10ms sleep just to be on the safe side.  I
think we can live with 10ms sleep on SRST.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Tejun Heo 2005-11-18 14:14:01 +09:00 committed by Jeff Garzik
parent 7d1ce682d0
commit ca45160db7
1 changed files with 66 additions and 10 deletions
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76
drivers/scsi/sata_sil24.c
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@ -333,7 +333,7 @@ static struct ata_port_info sil24_port_info[] = {
{
.sht = &sil24_sht,
.host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
ATA_FLAG_SRST | ATA_FLAG_MMIO |
ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(4),
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
@ -344,7 +344,7 @@ static struct ata_port_info sil24_port_info[] = {
{
.sht = &sil24_sht,
.host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
ATA_FLAG_SRST | ATA_FLAG_MMIO |
ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(2),
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
@ -355,7 +355,7 @@ static struct ata_port_info sil24_port_info[] = {
{
.sht = &sil24_sht,
.host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
ATA_FLAG_SRST | ATA_FLAG_MMIO |
ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(1),
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
@ -415,16 +415,72 @@ static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
*tf = pp->tf;
}
static int sil24_issue_SRST(struct ata_port *ap)
{
void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
struct sil24_port_priv *pp = ap->private_data;
struct sil24_prb *prb = &pp->cmd_block[0].prb;
dma_addr_t paddr = pp->cmd_block_dma;
u32 irq_enable, irq_stat;
int cnt;
/* temporarily turn off IRQs during SRST */
irq_enable = readl(port + PORT_IRQ_ENABLE_SET);
writel(irq_enable, port + PORT_IRQ_ENABLE_CLR);
/*
* XXX: Not sure whether the following sleep is needed or not.
* The original driver had it. So....
*/
msleep(10);
prb->ctrl = PRB_CTRL_SRST;
prb->fis[1] = 0; /* no PM yet */
writel((u32)paddr, port + PORT_CMD_ACTIVATE);
for (cnt = 0; cnt < 100; cnt++) {
irq_stat = readl(port + PORT_IRQ_STAT);
writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */
irq_stat >>= PORT_IRQ_RAW_SHIFT;
if (irq_stat & (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR))
break;
msleep(1);
}
/* restore IRQs */
writel(irq_enable, port + PORT_IRQ_ENABLE_SET);
if (!(irq_stat & PORT_IRQ_COMPLETE))
return -1;
/* update TF */
sil24_update_tf(ap);
return 0;
}
static void sil24_phy_reset(struct ata_port *ap)
{
struct sil24_port_priv *pp = ap->private_data;
__sata_phy_reset(ap);
/*
* No ATAPI yet. Just unconditionally indicate ATA device.
* If ATAPI device is attached, it will fail ATA_CMD_ID_ATA
* and libata core will ignore the device.
*/
if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
ap->device[0].class = ATA_DEV_ATA;
if (ap->flags & ATA_FLAG_PORT_DISABLED)
return;
if (sil24_issue_SRST(ap) < 0) {
printk(KERN_ERR DRV_NAME
" ata%u: SRST failed, disabling port\n", ap->id);
ap->ops->port_disable(ap);
return;
}
ap->device->class = ata_dev_classify(&pp->tf);
/* No ATAPI yet */
if (ap->device->class == ATA_DEV_ATAPI)
ap->ops->port_disable(ap);
}
static inline void sil24_fill_sg(struct ata_queued_cmd *qc,