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libata-sff: handle controllers w/o ctl register

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SFF incorrectly assumed that ctl register is available for all
controllers while some old SFF controllers don't have ctl register.
Make SFF handle controllers w/o ctl register by conditionalizing ctl
register access and softreset method.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2008-03-06 13:12:54 +09:00 committed by Jeff Garzik
parent eec59f76e9
commit f659f0e448
1 changed files with 22 additions and 14 deletions
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14
drivers/ata/libata-sff.c
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@ -56,6 +56,7 @@ u8 ata_irq_on(struct ata_port *ap)
ap->ctl &= ~ATA_NIEN;
ap->last_ctl = ap->ctl;
if (ioaddr->ctl_addr)
iowrite8(ap->ctl, ioaddr->ctl_addr);
tmp = ata_wait_idle(ap);
@ -81,12 +82,14 @@ void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
if (tf->ctl != ap->last_ctl) {
if (ioaddr->ctl_addr)
iowrite8(tf->ctl, ioaddr->ctl_addr);
ap->last_ctl = tf->ctl;
ata_wait_idle(ap);
}
if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
WARN_ON(!ioaddr->ctl_addr);
iowrite8(tf->hob_feature, ioaddr->feature_addr);
iowrite8(tf->hob_nsect, ioaddr->nsect_addr);
iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
@ -167,6 +170,7 @@ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
tf->device = ioread8(ioaddr->device_addr);
if (tf->flags & ATA_TFLAG_LBA48) {
if (likely(ioaddr->ctl_addr)) {
iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
tf->hob_feature = ioread8(ioaddr->error_addr);
tf->hob_nsect = ioread8(ioaddr->nsect_addr);
@ -175,6 +179,8 @@ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
tf->hob_lbah = ioread8(ioaddr->lbah_addr);
iowrite8(tf->ctl, ioaddr->ctl_addr);
ap->last_ctl = tf->ctl;
} else
WARN_ON(1);
}
}
@ -352,6 +358,7 @@ void ata_bmdma_freeze(struct ata_port *ap)
ap->ctl |= ATA_NIEN;
ap->last_ctl = ap->ctl;
if (ioaddr->ctl_addr)
iowrite8(ap->ctl, ioaddr->ctl_addr);
/* Under certain circumstances, some controllers raise IRQ on
@ -459,13 +466,14 @@ void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
*/
void ata_bmdma_error_handler(struct ata_port *ap)
{
ata_reset_fn_t hardreset;
ata_reset_fn_t softreset = NULL, hardreset = NULL;
hardreset = NULL;
if (ap->ioaddr.ctl_addr)
softreset = ata_std_softreset;
if (sata_scr_valid(&ap->link))
hardreset = sata_std_hardreset;
ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, hardreset,
ata_bmdma_drive_eh(ap, ata_std_prereset, softreset, hardreset,
ata_std_postreset);
}