Logo Search packages:      
Sourcecode: linux version File versions  Download package

fixup-tx4938.c

/*
 * Toshiba rbtx4938 pci routines
 * Copyright (C) 2000-2001 Toshiba Corporation
 *
 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
 * terms of the GNU General Public License version 2. This program is
 * licensed "as is" without any warranty of any kind, whether express
 * or implied.
 *
 * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
 */
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>

#include <asm/tx4938/rbtx4938.h>

extern struct pci_controller tx4938_pci_controller[];

static int pci_get_irq(const struct pci_dev *dev, int pin)
{
      int irq = pin;
      u8 slot = PCI_SLOT(dev->devfn);
      struct pci_controller *controller = (struct pci_controller *)dev->sysdata;

      if (controller == &tx4938_pci_controller[1]) {
            /* TX4938 PCIC1 */
            switch (slot) {
            case TX4938_PCIC_IDSEL_AD_TO_SLOT(31):
                  if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH0_SEL)
                        return RBTX4938_IRQ_IRC + TX4938_IR_ETH0;
                  break;
            case TX4938_PCIC_IDSEL_AD_TO_SLOT(30):
                  if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH1_SEL)
                        return RBTX4938_IRQ_IRC + TX4938_IR_ETH1;
                  break;
            }
            return 0;
      }

      /* IRQ rotation */
      irq--;      /* 0-3 */
      if (dev->bus->parent == NULL &&
          (slot == TX4938_PCIC_IDSEL_AD_TO_SLOT(23))) {
            /* PCI CardSlot (IDSEL=A23) */
            /* PCIA => PCIA (IDSEL=A23) */
            irq = (irq + 0 + slot) % 4;
      } else {
            /* PCI Backplane */
            irq = (irq + 33 - slot) % 4;
      }
      irq++;      /* 1-4 */

      switch (irq) {
      case 1:
            irq = RBTX4938_IRQ_IOC_PCIA;
            break;
      case 2:
            irq = RBTX4938_IRQ_IOC_PCIB;
            break;
      case 3:
            irq = RBTX4938_IRQ_IOC_PCIC;
            break;
      case 4:
            irq = RBTX4938_IRQ_IOC_PCID;
            break;
      }
      return irq;
}

int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
      unsigned char irq = 0;

      irq = pci_get_irq(dev, pin);

      printk(KERN_INFO "PCI: 0x%02x:0x%02x(0x%02x,0x%02x) IRQ=%d\n",
             dev->bus->number, dev->devfn, PCI_SLOT(dev->devfn),
             PCI_FUNC(dev->devfn), irq);

      return irq;
}

/*
 * Do platform specific device initialization at pci_enable_device() time
 */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
      return 0;
}


Generated by  Doxygen 1.6.0   Back to index