diff options
Diffstat (limited to 'drivers/ide/pci/sl82c105.c')
| -rw-r--r-- | drivers/ide/pci/sl82c105.c | 83 |
1 files changed, 39 insertions, 44 deletions
diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c index ea0806c82be..8a5c7b286b2 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}}, |