// 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; }