diff options
Diffstat (limited to 'arch/sh/drivers/pci/fixups-dreamcast.c')
| -rw-r--r-- | arch/sh/drivers/pci/fixups-dreamcast.c | 78 |
1 files changed, 43 insertions, 35 deletions
diff --git a/arch/sh/drivers/pci/fixups-dreamcast.c b/arch/sh/drivers/pci/fixups-dreamcast.c index cf30e2fa51b..1d1c5a227e5 100644 --- a/arch/sh/drivers/pci/fixups-dreamcast.c +++ b/arch/sh/drivers/pci/fixups-dreamcast.c @@ -1,10 +1,10 @@ /* - * arch/sh/pci/fixups-dreamcast.c + * arch/sh/drivers/pci/fixups-dreamcast.c * * PCI fixups for the Sega Dreamcast * * Copyright (C) 2001, 2002 M. R. Brown - * Copyright (C) 2002, 2003 Paul Mundt + * Copyright (C) 2002, 2003, 2006 Paul Mundt * * This file originally bore the message (with enclosed-$): * Id: pci.c,v 1.3 2003/05/04 19:29:46 lethal Exp @@ -15,7 +15,6 @@ * for more details. */ -#include <linux/config.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/param.h> @@ -23,14 +22,17 @@ #include <linux/init.h> #include <linux/irq.h> #include <linux/pci.h> +#include <linux/dma-mapping.h> #include <asm/io.h> #include <asm/irq.h> -#include <asm/mach/pci.h> +#include <mach/pci.h> -static void __init gapspci_fixup_resources(struct pci_dev *dev) +static void gapspci_fixup_resources(struct pci_dev *dev) { - struct pci_channel *p = board_pci_channels; + struct pci_channel *p = dev->sysdata; + struct resource res; + struct pci_bus_region region; printk(KERN_NOTICE "PCI: Fixing up device %s\n", pci_name(dev)); @@ -39,43 +41,49 @@ static void __init gapspci_fixup_resources(struct pci_dev *dev) /* * We also assume that dev->devfn == 0 */ - dev->resource[1].start = p->io_resource->start + 0x100; + dev->resource[1].start = p->resources[0].start + 0x100; dev->resource[1].end = dev->resource[1].start + 0x200 - 1; + + /* + * This is not a normal BAR, prevent any attempts to move + * the BAR, as this will result in a bus lock. + */ + dev->resource[1].flags |= IORESOURCE_PCI_FIXED; + + /* + * Redirect dma memory allocations to special memory window. + * + * If this GAPSPCI region were mapped by a BAR, the CPU + * phys_addr_t would be pci_resource_start(), and the bus + * address would be pci_bus_address(pci_resource_start()). + * But apparently there's no BAR mapping it, so we just + * "know" its CPU address is GAPSPCI_DMA_BASE. + */ + res.start = GAPSPCI_DMA_BASE; + res.end = GAPSPCI_DMA_BASE + GAPSPCI_DMA_SIZE - 1; + res.flags = IORESOURCE_MEM; + pcibios_resource_to_bus(dev->bus, ®ion, &res); + BUG_ON(!dma_declare_coherent_memory(&dev->dev, + res.start, + region.start, + resource_size(&res), + DMA_MEMORY_MAP | + DMA_MEMORY_EXCLUSIVE)); break; default: printk("PCI: Failed resource fixup\n"); } } - DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, gapspci_fixup_resources); -void __init pcibios_fixup_bus(struct pci_bus *bus) +int __init pcibios_map_platform_irq(const struct pci_dev *dev, u8 slot, u8 pin) { - /* - * We don't have any sub bus to fix up, and this is a rather - * stupid place to put general device fixups. Don't do it. - * Use the pcibios_fixups table or suffer the consequences. + /* + * The interrupt routing semantics here are quite trivial. + * + * We basically only support one interrupt, so we only bother + * updating a device's interrupt line with this single shared + * interrupt. Keeps routing quite simple, doesn't it? */ + return GAPSPCI_IRQ; } - -void __init pcibios_fixup_irqs(void) -{ - struct pci_dev *dev = 0; - - for_each_pci_dev(dev) { - /* - * The interrupt routing semantics here are quite trivial. - * - * We basically only support one interrupt, so we only bother - * updating a device's interrupt line with this single shared - * interrupt. Keeps routing quite simple, doesn't it? - */ - printk(KERN_NOTICE "PCI: Fixing up IRQ routing for device %s\n", - pci_name(dev)); - - dev->irq = GAPSPCI_IRQ; - - pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); - } -} - |