personal-pci.c

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/*
 * linux/arch/arm/mach-footbridge/personal-pci.c
 *
 * PCI bios-type initialisation for PCI machines
 *
 * Bits taken from various places.
 */
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>

#include <asm/irq.h>
#include <asm/mach/pci.h>
#include <asm/mach-types.h>

static int irqmap_personal_server[] __initdata = {
    IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
    IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
};

static int __init personal_server_map_irq(const struct pci_dev *dev, u8 slot,
    u8 pin)
{
    unsigned char line;

    pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);

    if (line > 0x40 && line <= 0x5f) {
        /* line corresponds to the bit controlling this interrupt
         * in the footbridge.  Ignore the first 8 interrupt bits,
         * look up the rest in the map.  IN0 is bit number 8
         */
        return irqmap_personal_server[(line & 0x1f) - 8];
    } else if (line == 0) {
        /* no interrupt */
        return 0;
    } else
        return irqmap_personal_server[(line - 1) & 3];
}

static struct hw_pci personal_server_pci __initdata = {
    .map_irq        = personal_server_map_irq,
    .nr_controllers     = 1,
    .ops            = &dc21285_ops,
    .setup          = dc21285_setup,
    .preinit        = dc21285_preinit,
    .postinit       = dc21285_postinit,
};

static int __init personal_pci_init(void)
{
    if (machine_is_personal_server())
        pci_common_init(&personal_server_pci);
    return 0;
}

subsys_initcall(personal_pci_init);