LXR linux/arch/mips/pci/fixup-tx4938.c

   1/*
   2 * Toshiba rbtx4938 pci routines
   3 * Copyright (C) 2000-2001 Toshiba Corporation
   4 *
   5 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
   6 * terms of the GNU General Public License version 2. This program is
   7 * licensed "as is" without any warranty of any kind, whether express
   8 * or implied.
   9 *
  10 * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
  11 */
  12#include <linux/types.h>
  13#include <linux/pci.h>
  14#include <linux/kernel.h>
  15#include <linux/init.h>
  16
  17#include <asm/tx4938/rbtx4938.h>
  18
  19extern struct pci_controller tx4938_pci_controller[];
  20
  21static int pci_get_irq(const struct pci_dev *dev, int pin)
  22{
  23        int irq = pin;
  24        u8 slot = PCI_SLOT(dev->devfn);
  25        struct pci_controller *controller = (struct pci_controller *)dev->sysdata;
  26
  27        if (controller == &tx4938_pci_controller[1]) {
  28                /* TX4938 PCIC1 */
  29                switch (slot) {
  30                case TX4938_PCIC_IDSEL_AD_TO_SLOT(31):
  31                        if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH0_SEL)
  32                                return RBTX4938_IRQ_IRC + TX4938_IR_ETH0;
  33                        break;
  34                case TX4938_PCIC_IDSEL_AD_TO_SLOT(30):
  35                        if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH1_SEL)
  36                                return RBTX4938_IRQ_IRC + TX4938_IR_ETH1;
  37                        break;
  38                }
  39                return 0;
  40        }
  41
  42        /* IRQ rotation */
  43        irq--;  /* 0-3 */
  44        if (dev->bus->parent == NULL &&
  45            (slot == TX4938_PCIC_IDSEL_AD_TO_SLOT(23))) {
  46                /* PCI CardSlot (IDSEL=A23) */
  47                /* PCIA => PCIA (IDSEL=A23) */
  48                irq = (irq + 0 + slot) % 4;
  49        } else {
  50                /* PCI Backplane */
  51                irq = (irq + 33 - slot) % 4;
  52        }
  53        irq++;  /* 1-4 */
  54
  55        switch (irq) {
  56        case 1:
  57                irq = RBTX4938_IRQ_IOC_PCIA;
  58                break;
  59        case 2:
  60                irq = RBTX4938_IRQ_IOC_PCIB;
  61                break;
  62        case 3:
  63                irq = RBTX4938_IRQ_IOC_PCIC;
  64                break;
  65        case 4:
  66                irq = RBTX4938_IRQ_IOC_PCID;
  67                break;
  68        }
  69        return irq;
  70}
  71
  72int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  73{
  74        unsigned char irq = 0;
  75
  76        irq = pci_get_irq(dev, pin);
  77
  78        printk(KERN_INFO "PCI: 0x%02x:0x%02x(0x%02x,0x%02x) IRQ=%d\n",
  79               dev->bus->number, dev->devfn, PCI_SLOT(dev->devfn),
  80               PCI_FUNC(dev->devfn), irq);
  81
  82        return irq;
  83}
  84
  85/*
  86 * Do platform specific device initialization at pci_enable_device() time
  87 */
  88int pcibios_plat_dev_init(struct pci_dev *dev)
  89{
  90        return 0;
  91}
  92
  93