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[PATCH] libata: Add CompactFlash support

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The CFA world has some additional rules and drive modes we need to support for
newer expansion cards and on embedded boxes

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan Cox 2006-08-10 18:52:12 +01:00 • committed by Jeff Garzik
parent cea0d336e7
commit b352e57dc3
3 changed files with 75 additions and 11 deletions
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20
include/linux/ata.h
View file

@ -170,12 +170,16 @@ enum {
XFER_UDMA_2 = 0x42,
XFER_UDMA_1 = 0x41,
XFER_UDMA_0 = 0x40,
XFER_MW_DMA_4 = 0x24, /* CFA only */
XFER_MW_DMA_3 = 0x23, /* CFA only */
XFER_MW_DMA_2 = 0x22,
XFER_MW_DMA_1 = 0x21,
XFER_MW_DMA_0 = 0x20,
XFER_SW_DMA_2 = 0x12,
XFER_SW_DMA_1 = 0x11,
XFER_SW_DMA_0 = 0x10,
XFER_PIO_6 = 0x0E, /* CFA only */
XFER_PIO_5 = 0x0D, /* CFA only */
XFER_PIO_4 = 0x0C,
XFER_PIO_3 = 0x0B,
XFER_PIO_2 = 0x0A,
@ -274,7 +278,6 @@ struct ata_taskfile {
};
#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
#define ata_id_is_cfa(id) ((id)[0] == 0x848A)
#define ata_id_is_sata(id) ((id)[93] == 0)
#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
@ -306,6 +309,9 @@ static inline unsigned int ata_id_major_version(const u16 *id)
{
unsigned int mver;
if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
return 0;
for (mver = 14; mver >= 1; mver--)
if (id[ATA_ID_MAJOR_VER] & (1 << mver))
break;
@ -324,6 +330,18 @@ static inline int ata_id_current_chs_valid(const u16 *id)
id[56]; /* sectors in current translation */
}
static inline int ata_id_is_cfa(const u16 *id)
{
u16 v = id[0];
if (v == 0x848A) /* Standard CF */
return 1;
/* Could be CF hiding as standard ATA */
if (ata_id_major_version(id) >= 3 && id[82] != 0xFFFF &&
(id[82] & ( 1 << 2)))
return 1;
return 0;
}
static inline int atapi_cdb_len(const u16 *dev_id)
{
u16 tmp = dev_id[0] & 0x3;