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path: root/drivers/ide/pci/sl82c105.c
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Diffstat (limited to 'drivers/ide/pci/sl82c105.c')
-rw-r--r--drivers/ide/pci/sl82c105.c83
1 files changed, 39 insertions, 44 deletions
diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c
index ea0806c..8a5c7b2 100644
--- a/drivers/ide/pci/sl82c105.c
+++ b/drivers/ide/pci/sl82c105.c
@@ -399,34 +399,6 @@ static unsigned int __devinit init_chipset_sl82c105(struct pci_dev *dev, const c
return dev->irq;
}
-static void __devinit init_dma_sl82c105(ide_hwif_t *hwif, unsigned long dma_base)
-{
- unsigned int rev;
- u8 dma_state;
-
- DBG(("init_dma_sl82c105(hwif: ide%d, dma_base: 0x%08x)\n", hwif->index, dma_base));
-
- hwif->autodma = 0;
-
- if (!dma_base)
- return;
-
- dma_state = hwif->INB(dma_base + 2);
- rev = sl82c105_bridge_revision(hwif->pci_dev);
- if (rev <= 5) {
- printk(" %s: Winbond 553 bridge revision %d, BM-DMA disabled\n",
- hwif->name, rev);
- dma_state &= ~0x60;
- } else {
- dma_state |= 0x60;
- if (!noautodma)
- hwif->autodma = 1;
- }
- hwif->OUTB(dma_state, dma_base + 2);
-
- ide_setup_dma(hwif, dma_base, 8);
-}
-
/*
* Initialise the chip
*/
@@ -434,6 +406,8 @@ static void __devinit init_dma_sl82c105(ide_hwif_t *hwif, unsigned long dma_base
static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif)
{
struct pci_dev *dev = hwif->pci_dev;
+ unsigned int rev;
+ u8 dma_state;
u32 val;
DBG(("init_hwif_sl82c105(hwif: ide%d)\n", hwif->index));
@@ -455,33 +429,54 @@ static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif)
pci_read_config_dword(dev, 0x40, &val);
*((u32 *)&hwif->hwif_data) = val;
+ hwif->atapi_dma = 0;
+ hwif->mwdma_mask = 0;
+ hwif->swdma_mask = 0;
+ hwif->autodma = 0;
+
if (!hwif->dma_base)
return;
- hwif->atapi_dma = 1;
- hwif->mwdma_mask = 0x07;
- hwif->swdma_mask = 0x07;
-
+ dma_state = hwif->INB(hwif->dma_base + 2) & ~0x60;
+ rev = sl82c105_bridge_revision(hwif->pci_dev);
+ if (rev <= 5) {
+ /*
+ * Never ever EVER under any circumstances enable
+ * DMA when the bridge is this old.
+ */
+ printk(" %s: Winbond 553 bridge revision %d, BM-DMA disabled\n",
+ hwif->name, rev);
+ } else {
#ifdef CONFIG_BLK_DEV_IDEDMA
- hwif->ide_dma_check = &sl82c105_check_drive;
- hwif->ide_dma_on = &sl82c105_ide_dma_on;
- hwif->ide_dma_off_quietly = &sl82c105_ide_dma_off_quietly;
- hwif->ide_dma_lostirq = &sl82c105_ide_dma_lost_irq;
- hwif->dma_start = &sl82c105_ide_dma_start;
- hwif->ide_dma_timeout = &sl82c105_ide_dma_timeout;
-
- if (!noautodma)
- hwif->autodma = 1;
- hwif->drives[0].autodma = hwif->autodma;
- hwif->drives[1].autodma = hwif->autodma;
+ dma_state |= 0x60;
+
+ hwif->atapi_dma = 1;
+ hwif->mwdma_mask = 0x07;
+ hwif->swdma_mask = 0x07;
+
+ hwif->ide_dma_check = &sl82c105_check_drive;
+ hwif->ide_dma_on = &sl82c105_ide_dma_on;
+ hwif->ide_dma_off_quietly = &sl82c105_ide_dma_off_quietly;
+ hwif->ide_dma_lostirq = &sl82c105_ide_dma_lost_irq;
+ hwif->dma_start = &sl82c105_ide_dma_start;
+ hwif->ide_dma_timeout = &sl82c105_ide_dma_timeout;
+
+ if (!noautodma)
+ hwif->autodma = 1;
+ hwif->drives[0].autodma = hwif->autodma;
+ hwif->drives[1].autodma = hwif->autodma;
+
+ if (hwif->mate)
+ hwif->serialized = hwif->mate->serialized = 1;
#endif /* CONFIG_BLK_DEV_IDEDMA */
+ }
+ hwif->OUTB(dma_state, hwif->dma_base + 2);
}
static ide_pci_device_t sl82c105_chipset __devinitdata = {
.name = "W82C105",
.init_chipset = init_chipset_sl82c105,
.init_hwif = init_hwif_sl82c105,
- .init_dma = init_dma_sl82c105,
.channels = 2,
.autodma = NOAUTODMA,
.enablebits = {{0x40,0x01,0x01}, {0x40,0x10,0x10}},
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