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Sourcecode: linux-2.6 version File versions

personal-pci.c

/*
 * 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(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,
      .setup                  = dc21285_setup,
      .scan             = dc21285_scan_bus,
      .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);

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