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