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84 lines
2.1 KiB
84 lines
2.1 KiB
// 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, [email protected] |
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* |
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* Copyright (C) 2009 Lemote, Inc. |
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* Author: Wu Zhangjin, [email protected] |
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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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