commit 49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb
author Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Mon Jul 09 23:17:58 2007 +0200
committer Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Mon Jul 09 23:17:58 2007 +0200
tree f61c34da6092f2f1a97a78da567afc59ad40850b
parent 75b1d97535327d0428c6bffd9d5407e65546fd5d

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>

drivers/ide/pci/aec62xx.c

diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c
index 794ac40..e5d0936 100644
--- a/drivers/ide/pci/aec62xx.c
+++ b/drivers/ide/pci/aec62xx.c
@@ -234,11 +234,12 @@
 		pci_read_config_byte (dev, 0x54, &reg54);
 		pci_write_config_byte(dev, 0x54, (reg54 & ~mask));
 		spin_unlock_irqrestore(&ide_lock, flags);
-	} else if (!hwif->udma_four) {
+	} else if (hwif->cbl != ATA_CBL_PATA40_SHORT) {
 		u8 ata66 = 0, mask = hwif->channel ? 0x02 : 0x01;
 
 		pci_read_config_byte(hwif->pci_dev, 0x49, &ata66);
-		hwif->udma_four = (ata66 & mask) ? 0 : 1;
+
+		hwif->cbl = (ata66 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
 	}
 
 	if (!noautodma)