1/*
2 * read/write operation to the PCI config space of CS5536
3 *
4 * Copyright (C) 2007 Lemote, Inc.
5 * Author : jlliu, liujl@lemote.com
6 *
7 * Copyright (C) 2009 Lemote, Inc.
8 * Author: Wu Zhangjin, wuzhangjin@gmail.com
9 *
10 * This program is free software; you can redistribute	it and/or modify it
11 * under  the terms of	the GNU General	 Public License as published by the
12 * Free Software Foundation;  either version 2 of the  License, or (at your
13 * option) any later version.
14 *
15 *	the Virtual Support Module(VSM) for virtulizing the PCI
16 *	configure space are defined in cs5536_modulename.c respectively,
17 *
18 *	after this virtulizing, user can access the PCI configure space
19 *	directly as a normal multi-function PCI device which follows
20 *	the PCI-2.2 spec.
21 */
22
23#include <linux/types.h>
24#include <cs5536/cs5536_pci.h>
25#include <cs5536/cs5536_vsm.h>
26
27enum {
28	CS5536_FUNC_START = -1,
29	CS5536_ISA_FUNC,
30	reserved_func,
31	CS5536_IDE_FUNC,
32	CS5536_ACC_FUNC,
33	CS5536_OHCI_FUNC,
34	CS5536_EHCI_FUNC,
35	CS5536_FUNC_END,
36};
37
38static const cs5536_pci_vsm_write vsm_conf_write[] = {
39	[CS5536_ISA_FUNC]	= pci_isa_write_reg,
40	[reserved_func]		= NULL,
41	[CS5536_IDE_FUNC]	= pci_ide_write_reg,
42	[CS5536_ACC_FUNC]	= pci_acc_write_reg,
43	[CS5536_OHCI_FUNC]	= pci_ohci_write_reg,
44	[CS5536_EHCI_FUNC]	= pci_ehci_write_reg,
45};
46
47static const cs5536_pci_vsm_read vsm_conf_read[] = {
48	[CS5536_ISA_FUNC]	= pci_isa_read_reg,
49	[reserved_func]		= NULL,
50	[CS5536_IDE_FUNC]	= pci_ide_read_reg,
51	[CS5536_ACC_FUNC]	= pci_acc_read_reg,
52	[CS5536_OHCI_FUNC]	= pci_ohci_read_reg,
53	[CS5536_EHCI_FUNC]	= pci_ehci_read_reg,
54};
55
56/*
57 * write to PCI config space and transfer it to MSR write.
58 */
59void cs5536_pci_conf_write4(int function, int reg, u32 value)
60{
61	if ((function <= CS5536_FUNC_START) || (function >= CS5536_FUNC_END))
62		return;
63	if ((reg < 0) || (reg > 0x100) || ((reg & 0x03) != 0))
64		return;
65
66	if (vsm_conf_write[function] != NULL)
67		vsm_conf_write[function](reg, value);
68}
69
70/*
71 * read PCI config space and transfer it to MSR access.
72 */
73u32 cs5536_pci_conf_read4(int function, int reg)
74{
75	u32 data = 0;
76
77	if ((function <= CS5536_FUNC_START) || (function >= CS5536_FUNC_END))
78		return 0;
79	if ((reg < 0) || ((reg & 0x03) != 0))
80		return 0;
81	if (reg > 0x100)
82		return 0xffffffff;
83
84	if (vsm_conf_read[function] != NULL)
85		data = vsm_conf_read[function](reg);
86
87	return data;
88}
89