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
sh5pci_read(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 * val)22 static 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
sh5pci_write(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 val)42 static 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
62 struct pci_ops sh5_pci_ops = {
63 .read = sh5pci_read,
64 .write = sh5pci_write,
65 };
66
