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64 lines
1.4 KiB
64 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/arm/mach-footbridge/cats-pci.c |
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* |
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* PCI bios-type initialisation for PCI machines |
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* |
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* Bits taken from various places. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/pci.h> |
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#include <linux/init.h> |
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#include <asm/irq.h> |
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#include <asm/mach/pci.h> |
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#include <asm/mach-types.h> |
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/* cats host-specific stuff */ |
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static int irqmap_cats[] = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 }; |
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static u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin) |
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{ |
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return 0; |
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} |
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static int cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
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{ |
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if (dev->irq >= 255) |
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return -1; /* not a valid interrupt. */ |
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if (dev->irq >= 128) |
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return dev->irq & 0x1f; |
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if (dev->irq >= 1 && dev->irq <= 4) |
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return irqmap_cats[dev->irq - 1]; |
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if (dev->irq != 0) |
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printk("PCI: device %02x:%02x has unknown irq line %x\n", |
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dev->bus->number, dev->devfn, dev->irq); |
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return -1; |
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} |
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/* |
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* why not the standard PCI swizzle? does this prevent 4-port tulip |
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* cards being used (ie, pci-pci bridge based cards)? |
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*/ |
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static struct hw_pci cats_pci __initdata = { |
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.swizzle = cats_no_swizzle, |
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.map_irq = cats_map_irq, |
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.nr_controllers = 1, |
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.ops = &dc21285_ops, |
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.setup = dc21285_setup, |
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.preinit = dc21285_preinit, |
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.postinit = dc21285_postinit, |
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}; |
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static int __init cats_pci_init(void) |
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{ |
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if (machine_is_cats()) |
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pci_common_init(&cats_pci); |
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return 0; |
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} |
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subsys_initcall(cats_pci_init);
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