LXR linux/arch/sh/drivers/pci/ops-sh5.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Support functions for the SH5 PCI hardware.
   4 *
   5 * Copyright (C) 2001 David J. Mckay (david.mckay@st.com)
   6 * Copyright (C) 2003, 2004 Paul Mundt
   7 * Copyright (C) 2004 Richard Curnow
   8 */
   9#include <linux/kernel.h>
  10#include <linux/rwsem.h>
  11#include <linux/smp.h>
  12#include <linux/interrupt.h>
  13#include <linux/init.h>
  14#include <linux/errno.h>
  15#include <linux/pci.h>
  16#include <linux/delay.h>
  17#include <linux/types.h>
  18#include <linux/irq.h>
  19#include <asm/io.h>
  20#include "pci-sh5.h"
  21
  22static int sh5pci_read(struct pci_bus *bus, unsigned int devfn, int where,
  23                        int size, u32 *val)
  24{
  25        SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where));
  26
  27        switch (size) {
  28                case 1:
  29                        *val = (u8)SH5PCI_READ_BYTE(PDR + (where & 3));
  30                        break;
  31                case 2:
  32                        *val = (u16)SH5PCI_READ_SHORT(PDR + (where & 2));
  33                        break;
  34                case 4:
  35                        *val = SH5PCI_READ(PDR);
  36                        break;
  37        }
  38
  39        return PCIBIOS_SUCCESSFUL;
  40}
  41
  42static int sh5pci_write(struct pci_bus *bus, unsigned int devfn, int where,
  43                         int size, u32 val)
  44{
  45        SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where));
  46
  47        switch (size) {
  48                case 1:
  49                        SH5PCI_WRITE_BYTE(PDR + (where & 3), (u8)val);
  50                        break;
  51                case 2:
  52                        SH5PCI_WRITE_SHORT(PDR + (where & 2), (u16)val);
  53                        break;
  54                case 4:
  55                        SH5PCI_WRITE(PDR, val);
  56                        break;
  57        }
  58
  59        return PCIBIOS_SUCCESSFUL;
  60}
  61
  62struct pci_ops sh5_pci_ops = {
  63        .read           = sh5pci_read,
  64        .write          = sh5pci_write,
  65};
  66