1 /*
2 * Support functions for the SH5 PCI hardware.
3 *
4 * Copyright (C) 2001 David J. Mckay (david.mckay@st.com)
5 * Copyright (C) 2003, 2004 Paul Mundt
6 * Copyright (C) 2004 Richard Curnow
7 *
8 * May be copied or modified under the terms of the GNU General Public
9 * License. See linux/COPYING for more information.
10 */
11 #include <linux/kernel.h>
12 #include <linux/rwsem.h>
13 #include <linux/smp.h>
14 #include <linux/interrupt.h>
15 #include <linux/init.h>
16 #include <linux/errno.h>
17 #include <linux/pci.h>
18 #include <linux/delay.h>
19 #include <linux/types.h>
20 #include <linux/irq.h>
21 #include <asm/pci.h>
22 #include <asm/io.h>
23 #include "pci-sh5.h"
24
sh5pci_read(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 * val)25 static int sh5pci_read(struct pci_bus *bus, unsigned int devfn, int where,
26 int size, u32 *val)
27 {
28 SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where));
29
30 switch (size) {
31 case 1:
32 *val = (u8)SH5PCI_READ_BYTE(PDR + (where & 3));
33 break;
34 case 2:
35 *val = (u16)SH5PCI_READ_SHORT(PDR + (where & 2));
36 break;
37 case 4:
38 *val = SH5PCI_READ(PDR);
39 break;
40 }
41
42 return PCIBIOS_SUCCESSFUL;
43 }
44
sh5pci_write(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 val)45 static int sh5pci_write(struct pci_bus *bus, unsigned int devfn, int where,
46 int size, u32 val)
47 {
48 SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where));
49
50 switch (size) {
51 case 1:
52 SH5PCI_WRITE_BYTE(PDR + (where & 3), (u8)val);
53 break;
54 case 2:
55 SH5PCI_WRITE_SHORT(PDR + (where & 2), (u16)val);
56 break;
57 case 4:
58 SH5PCI_WRITE(PDR, val);
59 break;
60 }
61
62 return PCIBIOS_SUCCESSFUL;
63 }
64
65 struct pci_ops sh5_pci_ops = {
66 .read = sh5pci_read,
67 .write = sh5pci_write,
68 };
69