ops-sh5.c

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/*
 * Support functions for the SH5 PCI hardware.
 *
 * Copyright (C) 2001 David J. Mckay ([email protected])
 * Copyright (C) 2003, 2004 Paul Mundt
 * Copyright (C) 2004 Richard Curnow
 *
 * 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/rwsem.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <asm/pci.h>
#include <asm/io.h>
#include "pci-sh5.h"

static int sh5pci_read(struct pci_bus *bus, unsigned int devfn, int where,
            int size, u32 *val)
{
    SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where));

    switch (size) {
        case 1:
            *val = (u8)SH5PCI_READ_BYTE(PDR + (where & 3));
            break;
        case 2:
            *val = (u16)SH5PCI_READ_SHORT(PDR + (where & 2));
            break;
        case 4:
            *val = SH5PCI_READ(PDR);
            break;
    }

    return PCIBIOS_SUCCESSFUL;
}

static int sh5pci_write(struct pci_bus *bus, unsigned int devfn, int where,
             int size, u32 val)
{
    SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where));

    switch (size) {
        case 1:
            SH5PCI_WRITE_BYTE(PDR + (where & 3), (u8)val);
            break;
        case 2:
            SH5PCI_WRITE_SHORT(PDR + (where & 2), (u16)val);
            break;
        case 4:
            SH5PCI_WRITE(PDR, val);
            break;
    }

    return PCIBIOS_SUCCESSFUL;
}

struct pci_ops sh5_pci_ops = {
    .read       = sh5pci_read,
    .write      = sh5pci_write,
};