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[PATCH] libata: add 40pin "short" cable support, honour drive side speed detection

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[deweerdt@free.fr: build fix]
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Frederik Deweerdt <deweerdt@free.fr>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan Cox 2006-10-10 14:28:11 -07:00 • committed by Jeff Garzik
parent 2f27ce0362
commit fc085150b4
4 changed files with 50 additions and 4 deletions
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14
include/linux/ata.h
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@ -200,8 +200,9 @@ enum {
ATA_CBL_NONE = 0,
ATA_CBL_PATA40 = 1,
ATA_CBL_PATA80 = 2,
ATA_CBL_PATA_UNK = 3,
ATA_CBL_SATA = 4,
ATA_CBL_PATA40_SHORT = 3, /* 40 wire cable to high UDMA spec */
ATA_CBL_PATA_UNK = 4,
ATA_CBL_SATA = 5,
/* SATA Status and Control Registers */
SCR_STATUS = 0,
@ -342,6 +343,15 @@ static inline int ata_id_is_cfa(const u16 *id)
return 0;
}
static inline int ata_drive_40wire(const u16 *dev_id)
{
if (ata_id_major_version(dev_id) >= 5 && ata_id_is_sata(dev_id))
return 0; /* SATA */
if (dev_id[93] & 0x4000)
return 0; /* 80 wire */
return 1;
}
static inline int atapi_cdb_len(const u16 *dev_id)
{
u16 tmp = dev_id[0] & 0x3;