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[libata] sata_sx4: fixup interrupt handling 

Issuing ATA_CMD_SET_FEATURES (0xef) times out because
pdc20621_interrupt ignores command completion since
ATA_TFLAG_POLLING flag is set.

This has already been fixed for sata_promise:

commit 51b94d2a5a
Author: Tejun Heo <htejun@gmail.com>
Date:   Fri Jun 8 13:46:55 2007 -0700

    sata_promise: use TF interface for polling NODATA commands

Also, this patch includes Mikael's original patches:

http://marc.info/?l=linux-ide&m=121135828227724&w=2
http://marc.info/?l=linux-ide&m=121144512109826&w=2

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
hifive-unleashed-5.1
David Milburn 2009-05-13 18:02:21 -05:00 committed by Jeff Garzik
parent 67651ee571
commit 19799bfc5d
1 changed files with 9 additions and 13 deletions
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22
drivers/ata/sata_sx4.c
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@ -687,8 +687,11 @@ static void pdc20621_packet_start(struct ata_queued_cmd *qc)
static unsigned int pdc20621_qc_issue(struct ata_queued_cmd *qc)
{
switch (qc->tf.protocol) {
case ATA_PROT_DMA:
case ATA_PROT_NODATA:
if (qc->tf.flags & ATA_TFLAG_POLLING)
break;
/*FALLTHROUGH*/
case ATA_PROT_DMA:
pdc20621_packet_start(qc);
return 0;
@ -787,12 +790,7 @@ static inline unsigned int pdc20621_host_intr(struct ata_port *ap,
static void pdc20621_irq_clear(struct ata_port *ap)
{
struct ata_host *host = ap->host;
void __iomem *mmio = host->iomap[PDC_MMIO_BAR];
mmio += PDC_CHIP0_OFS;
readl(mmio + PDC_20621_SEQMASK);
ioread8(ap->ioaddr.status_addr);
}
static irqreturn_t pdc20621_interrupt(int irq, void *dev_instance)
@ -877,14 +875,12 @@ static void pdc_freeze(struct ata_port *ap)
static void pdc_thaw(struct ata_port *ap)
{
void __iomem *mmio = ap->ioaddr.cmd_addr;
void __iomem *mmio_base;
u32 tmp;
/* FIXME: start HDMA engine, if zero ATA engines running */
/* reading SEQ mask register clears IRQ */
mmio_base = ap->host->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS;
readl(mmio_base + PDC_20621_SEQMASK);
/* clear IRQ */
ioread8(ap->ioaddr.status_addr);
/* turn IRQ back on */
tmp = readl(mmio + PDC_CTLSTAT);
@ -974,7 +970,7 @@ static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
{
WARN_ON(tf->protocol == ATA_PROT_DMA ||
tf->protocol == ATA_PROT_NODATA);
tf->protocol == ATAPI_PROT_DMA);
ata_sff_tf_load(ap, tf);
}
@ -982,7 +978,7 @@ static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
{
WARN_ON(tf->protocol == ATA_PROT_DMA ||
tf->protocol == ATA_PROT_NODATA);
tf->protocol == ATAPI_PROT_DMA);
ata_sff_exec_command(ap, tf);
}