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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-07-09 23:17:58 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-07-09 23:17:58 +0200 |
| commit | 49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb (patch) | |
| tree | f61c34da6092f2f1a97a78da567afc59ad40850b /drivers/ide/ide-iops.c | |
| parent | 75b1d97535327d0428c6bffd9d5407e65546fd5d (diff) | |
| download | lwn-49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb.tar.gz lwn-49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb.zip | |
ide: add short cables support
This patch allows users to override both host and device side cable detection
with "ideX=ata66" kernel parameter. Thanks to this it should be now possible
to use UDMA > 2 modes on systems (laptops mainly) which use short 40-pin cable
instead of 80-pin one.
Next patches add automatic detection of some systems using short cables.
Changes:
* Rename hwif->udma_four to hwif->cbl and make it u8.
* Convert all existing users accordingly (use ATA_CBL_* defines while at it).
* Add ATA_CBL_PATA40_SHORT support to ide-iops.c:eighty_ninty_three().
* Use ATA_CBL_PATA40_SHORT for "ideX=ata66" kernel parameter.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Reviewed-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Diffstat (limited to 'drivers/ide/ide-iops.c')
| -rw-r--r-- | drivers/ide/ide-iops.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index f0be5f665a0e..92578b6832e9 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -574,7 +574,10 @@ u8 eighty_ninty_three (ide_drive_t *drive) ide_hwif_t *hwif = drive->hwif; struct hd_driveid *id = drive->id; - if (hwif->udma_four == 0) + if (hwif->cbl == ATA_CBL_PATA40_SHORT) + return 1; + + if (hwif->cbl != ATA_CBL_PATA80) goto no_80w; /* Check for SATA but only if we are ATA5 or higher */ @@ -600,7 +603,8 @@ no_80w: printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " "limiting max speed to UDMA33\n", - drive->name, hwif->udma_four ? "drive" : "host"); + drive->name, + hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); drive->udma33_warned = 1; |