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libata: implement ata_timing_cycle2mode() and use it in libata-acpi and pata_acpi

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libata-acpi is using separate timing tables for transfer modes
although libata-core has the complete ata_timing table.  Implement
ata_timing_cycle2mode() to look for matching mode given transfer type
and cycle duration and use it in libata-acpi and pata_acpi to replace
private timing tables.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-12-18 16:33:05 +09:00
committed by Jeff Garzik
parent 5df91a25df
commit a0f79b929a
4 changed files with 75 additions and 57 deletions
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5
include/linux/libata.h
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@@ -941,6 +941,7 @@ extern int ata_timing_compute(struct ata_device *, unsigned short,
extern void ata_timing_merge(const struct ata_timing *,
const struct ata_timing *, struct ata_timing *,
unsigned int);
extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
enum {
ATA_TIMING_SETUP = (1 << 0),
@@ -961,10 +962,6 @@ enum {
/* libata-acpi.c */
#ifdef CONFIG_ATA_ACPI
extern const unsigned int ata_acpi_pio_cycle[7];
extern const unsigned int ata_acpi_mwdma_cycle[5];
extern const unsigned int ata_acpi_udma_cycle[7];
static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
{
if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)