fixups-landisk.c

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/*
 * arch/sh/drivers/pci/fixups-landisk.c
 *
 * PCI initialization for the I-O DATA Device, Inc. LANDISK board
 *
 * Copyright (C) 2006 kogiidena
 * Copyright (C) 2010 Nobuhiro Iwamatsu
 *
 * May be copied or modified under the terms of the GNU General Public
 * License.  See linux/COPYING for more information.
 */
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/sh_intc.h>
#include "pci-sh4.h"

#define PCIMCR_MRSET_OFF    0xBFFFFFFF
#define PCIMCR_RFSH_OFF     0xFFFFFFFB

int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
{
    /*
     * slot0: pin1-4 = irq5,6,7,8
     * slot1: pin1-4 = irq6,7,8,5
     * slot2: pin1-4 = irq7,8,5,6
     * slot3: pin1-4 = irq8,5,6,7
     */
    int irq = ((slot + pin - 1) & 0x3) + evt2irq(0x2a0);

    if ((slot | (pin - 1)) > 0x3) {
        printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
               slot, pin - 1 + 'A');
        return -1;
    }
    return irq;
}

int pci_fixup_pcic(struct pci_channel *chan)
{
    unsigned long bcr1, mcr;

    bcr1 = __raw_readl(SH7751_BCR1);
    bcr1 |= 0x40080000; /* Enable Bit 19 BREQEN, set PCIC to slave */
    pci_write_reg(chan, bcr1, SH4_PCIBCR1);

    mcr = __raw_readl(SH7751_MCR);
    mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
    pci_write_reg(chan, mcr, SH4_PCIMCR);

    pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
    pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
    pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
    pci_write_reg(chan, 0x00000000, SH4_PCILAR1);

    return 0;
}