LXR linux/arch/sh/drivers/pci/fixups-landisk.c

   1/*
   2 * arch/sh/drivers/pci/fixups-landisk.c
   3 *
   4 * PCI initialization for the I-O DATA Device, Inc. LANDISK board
   5 *
   6 * Copyright (C) 2006 kogiidena
   7 * Copyright (C) 2010 Nobuhiro Iwamatsu
   8 *
   9 * May be copied or modified under the terms of the GNU General Public
  10 * License.  See linux/COPYING for more information.
  11 */
  12#include <linux/kernel.h>
  13#include <linux/types.h>
  14#include <linux/init.h>
  15#include <linux/delay.h>
  16#include <linux/pci.h>
  17#include <linux/sh_intc.h>
  18#include "pci-sh4.h"
  19
  20#define PCIMCR_MRSET_OFF        0xBFFFFFFF
  21#define PCIMCR_RFSH_OFF         0xFFFFFFFB
  22
  23int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
  24{
  25        /*
  26         * slot0: pin1-4 = irq5,6,7,8
  27         * slot1: pin1-4 = irq6,7,8,5
  28         * slot2: pin1-4 = irq7,8,5,6
  29         * slot3: pin1-4 = irq8,5,6,7
  30         */
  31        int irq = ((slot + pin - 1) & 0x3) + evt2irq(0x2a0);
  32
  33        if ((slot | (pin - 1)) > 0x3) {
  34                printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
  35                       slot, pin - 1 + 'A');
  36                return -1;
  37        }
  38        return irq;
  39}
  40
  41int pci_fixup_pcic(struct pci_channel *chan)
  42{
  43        unsigned long bcr1, mcr;
  44
  45        bcr1 = __raw_readl(SH7751_BCR1);
  46        bcr1 |= 0x40080000;     /* Enable Bit 19 BREQEN, set PCIC to slave */
  47        pci_write_reg(chan, bcr1, SH4_PCIBCR1);
  48
  49        mcr = __raw_readl(SH7751_MCR);
  50        mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
  51        pci_write_reg(chan, mcr, SH4_PCIMCR);
  52
  53        pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
  54        pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
  55        pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
  56        pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
  57
  58        return 0;
  59}
  60