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};