via82cxxx: backport short cables support from pata_via.c

Backport short cables support from pata_via.c.

This patch should allow UDMA > 2 modes on Acer Ferrari 3400.
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
parent f2befd9e
/*
*
* Version 3.40
* Version 3.45
*
* VIA IDE driver for Linux. Supported southbridges:
*
......@@ -34,6 +34,8 @@
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/ide.h>
#include <linux/dmi.h>
#include <asm/io.h>
#ifdef CONFIG_PPC_CHRP
......@@ -415,6 +417,42 @@ static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const
return 0;
}
/*
* Cable special cases
*/
static struct dmi_system_id cable_dmi_table[] = {
{
.ident = "Acer Ferrari 3400",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
},
},
{ }
};
static int via_cable_override(void)
{
/* Systems by DMI */
if (dmi_check_system(cable_dmi_table))
return 1;
return 0;
}
static u8 __devinit via82cxxx_cable_detect(ide_hwif_t *hwif)
{
struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
if (via_cable_override())
return ATA_CBL_PATA40_SHORT;
if ((vdev->via_80w >> hwif->channel) & 1)
return ATA_CBL_PATA80;
else
return ATA_CBL_PATA40;
}
static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
{
struct via82cxxx_dev *vdev = pci_get_drvdata(hwif->pci_dev);
......@@ -448,12 +486,8 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;
if (hwif->cbl != ATA_CBL_PATA40_SHORT) {
if ((vdev->via_80w >> hwif->channel) & 1)
hwif->cbl = ATA_CBL_PATA80;
else
hwif->cbl = ATA_CBL_PATA40;
}
if (hwif->cbl != ATA_CBL_PATA40_SHORT)
hwif->cbl = via82cxxx_cable_detect(hwif);
hwif->ide_dma_check = &via82cxxx_ide_dma_check;
if (!noautodma)
......
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