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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* read/write operation to the PCI config space of CS5536
*
* Copyright (C) 2007 Lemote, Inc.
* Author : jlliu, liujl@lemote.com
*
* Copyright (C) 2009 Lemote, Inc.
* Author: Wu Zhangjin, wuzhangjin@gmail.com
*
* the Virtual Support Module(VSM) for virtulizing the PCI
* configure space are defined in cs5536_modulename.c respectively,
*
* after this virtulizing, user can access the PCI configure space
* directly as a normal multi-function PCI device which follows
* the PCI-2.2 spec.
*/
#include <linux/types.h>
#include <cs5536/cs5536_pci.h>
#include <cs5536/cs5536_vsm.h>
enum {
CS5536_FUNC_START = -1,
CS5536_ISA_FUNC,
reserved_func,
CS5536_IDE_FUNC,
CS5536_ACC_FUNC,
CS5536_OHCI_FUNC,
CS5536_EHCI_FUNC,
CS5536_FUNC_END,
};
static const cs5536_pci_vsm_write vsm_conf_write[] = {
[CS5536_ISA_FUNC] = pci_isa_write_reg,
[reserved_func] = NULL,
[CS5536_IDE_FUNC] = pci_ide_write_reg,
[CS5536_ACC_FUNC] = pci_acc_write_reg,
[CS5536_OHCI_FUNC] = pci_ohci_write_reg,
[CS5536_EHCI_FUNC] = pci_ehci_write_reg,
};
static const cs5536_pci_vsm_read vsm_conf_read[] = {
[CS5536_ISA_FUNC] = pci_isa_read_reg,
[reserved_func] = NULL,
[CS5536_IDE_FUNC] = pci_ide_read_reg,
[CS5536_ACC_FUNC] = pci_acc_read_reg,
[CS5536_OHCI_FUNC] = pci_ohci_read_reg,
[CS5536_EHCI_FUNC] = pci_ehci_read_reg,
};
/*
* write to PCI config space and transfer it to MSR write.
*/
void cs5536_pci_conf_write4(int function, int reg, u32 value)
{
if ((function <= CS5536_FUNC_START) || (function >= CS5536_FUNC_END))
return;
if ((reg < 0) || (reg > 0x100) || ((reg & 0x03) != 0))
return;
if (vsm_conf_write[function] != NULL)
vsm_conf_write[function](reg, value);
}
/*
* read PCI config space and transfer it to MSR access.
*/
u32 cs5536_pci_conf_read4(int function, int reg)
{
u32 data = 0;
if ((function <= CS5536_FUNC_START) || (function >= CS5536_FUNC_END))
return 0;
if ((reg < 0) || ((reg & 0x03) != 0))
return 0;
if (reg > 0x100)
return 0xffffffff;
if (vsm_conf_read[function] != NULL)
data = vsm_conf_read[function](reg);
return data;
}
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