aboutsummaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-07-09 23:17:58 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-07-09 23:17:58 +0200
commit7207626f47a3d66ce361bad197eefca4b8a6fa17 (patch)
tree57f386c2e27656dcc13b6f1a4804bf79f141a9fb /drivers
parent49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb (diff)
piix: backport short cables support from ata_piix.c
Backport short cables support from ata_piix.c. This patch should allow UDMA > 2 modes on: - Acer 5602WLMi - Acer 3682WLMi - Asus W5F - Acer Aspire 2023WLMi Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ide/pci/piix.c37
1 files changed, 34 insertions, 3 deletions
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index 1547c37f333..2e0b29ef596 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/ide/pci/piix.c Version 0.47 February 8, 2007
+ * linux/drivers/ide/pci/piix.c Version 0.50 Jun 10, 2007
*
* Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
@@ -394,12 +394,43 @@ static void piix_dma_clear_irq(ide_drive_t *drive)
hwif->OUTB(dma_stat, hwif->dma_status);
}
+struct ich_laptop {
+ u16 device;
+ u16 subvendor;
+ u16 subdevice;
+};
+
+/*
+ * List of laptops that use short cables rather than 80 wire
+ */
+
+static const struct ich_laptop ich_laptop[] = {
+ /* devid, subvendor, subdev */
+ { 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
+ { 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
+ { 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
+ { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on Acer Aspire 2023WLMi */
+ /* end marker */
+ { 0, }
+};
+
static u8 __devinit piix_cable_detect(ide_hwif_t *hwif)
{
- struct pci_dev *dev = hwif->pci_dev;
+ struct pci_dev *pdev = hwif->pci_dev;
+ const struct ich_laptop *lap = &ich_laptop[0];
u8 reg54h = 0, mask = hwif->channel ? 0xc0 : 0x30;
- pci_read_config_byte(dev, 0x54, &reg54h);
+ /* check for specials */
+ while (lap->device) {
+ if (lap->device == pdev->device &&
+ lap->subvendor == pdev->subsystem_vendor &&
+ lap->subdevice == pdev->subsystem_device) {
+ return ATA_CBL_PATA40_SHORT;
+ }
+ lap++;
+ }
+
+ pci_read_config_byte(pdev, 0x54, &reg54h);
return (reg54h & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
}