2 * read/write operation to the PCI config space of CS5536
4 * Copyright (C) 2007 Lemote, Inc.
5 * Author : jlliu, liujl@lemote.com
7 * Copyright (C) 2009 Lemote, Inc.
8 * Author: Wu Zhangjin, wuzj@lemote.com
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.
15 * the Virtual Support Module(VSM) for virtulizing the PCI
16 * configure space are defined in cs5536_modulename.c respectively,
18 * after this virtulizing, user can access the PCI configure space
19 * directly as a normal multi-function PCI device which follows
23 #include <linux/types.h>
24 #include <cs5536/cs5536_vsm.h>
27 CS5536_FUNC_START = -1,
37 static const cs5536_pci_vsm_write vsm_conf_write[] = {
38 [CS5536_ISA_FUNC] pci_isa_write_reg,
40 [CS5536_IDE_FUNC] pci_ide_write_reg,
41 [CS5536_ACC_FUNC] pci_acc_write_reg,
42 [CS5536_OHCI_FUNC] pci_ohci_write_reg,
43 [CS5536_EHCI_FUNC] pci_ehci_write_reg,
46 static const cs5536_pci_vsm_read vsm_conf_read[] = {
47 [CS5536_ISA_FUNC] pci_isa_read_reg,
49 [CS5536_IDE_FUNC] pci_ide_read_reg,
50 [CS5536_ACC_FUNC] pci_acc_read_reg,
51 [CS5536_OHCI_FUNC] pci_ohci_read_reg,
52 [CS5536_EHCI_FUNC] pci_ehci_read_reg,
56 * write to PCI config space and transfer it to MSR write.
58 void cs5536_pci_conf_write4(int function, int reg, u32 value)
60 if ((function <= CS5536_FUNC_START) || (function >= CS5536_FUNC_END))
62 if ((reg < 0) || (reg > 0x100) || ((reg & 0x03) != 0))
65 if (vsm_conf_write[function] != NULL)
66 vsm_conf_write[function](reg, value);
70 * read PCI config space and transfer it to MSR access.
72 u32 cs5536_pci_conf_read4(int function, int reg)
76 if ((function <= CS5536_FUNC_START) || (function >= CS5536_FUNC_END))
78 if ((reg < 0) || ((reg & 0x03) != 0))
83 if (vsm_conf_read[function] != NULL)
84 data = vsm_conf_read[function](reg);