projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 22c21003 WZ |
1 | /* |
| 2 | * read/write operation to the PCI config space of CS5536 | |
| 3 | * | |
| 4 | * Copyright (C) 2007 Lemote, Inc. | |
| 5 | * Author : jlliu, liujl@lemote.com | |
| 6 | * | |
| 7 | * Copyright (C) 2009 Lemote, Inc. | |
| f7a904df | 8 | * Author: Wu Zhangjin, wuzhangjin@gmail.com |
| 22c21003 WZ |
9 | * |
| 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. | |
| 14 | * | |
| 15 | * the Virtual Support Module(VSM) for virtulizing the PCI | |
| 16 | * configure space are defined in cs5536_modulename.c respectively, | |
| 17 | * | |
| 18 | * after this virtulizing, user can access the PCI configure space | |
| 19 | * directly as a normal multi-function PCI device which follows | |
| 20 | * the PCI-2.2 spec. | |
| 21 | */ | |
| 22 | ||
| 23 | #include <linux/types.h> | |
| 24 | #include <cs5536/cs5536_vsm.h> | |
| 25 | ||
| 26 | enum { | |
| 27 | CS5536_FUNC_START = -1, | |
| 28 | CS5536_ISA_FUNC, | |
| 29 | reserved_func, | |
| 30 | CS5536_IDE_FUNC, | |
| 31 | CS5536_ACC_FUNC, | |
| 32 | CS5536_OHCI_FUNC, | |
| 33 | CS5536_EHCI_FUNC, | |
| 34 | CS5536_FUNC_END, | |
| 35 | }; | |
| 36 | ||
| 37 | static const cs5536_pci_vsm_write vsm_conf_write[] = { | |
| 38 | [CS5536_ISA_FUNC] pci_isa_write_reg, | |
| 39 | [reserved_func] NULL, | |
| 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, | |
| 44 | }; | |
| 45 | ||
| 46 | static const cs5536_pci_vsm_read vsm_conf_read[] = { | |
| 47 | [CS5536_ISA_FUNC] pci_isa_read_reg, | |
| 48 | [reserved_func] NULL, | |
| 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, | |
| 53 | }; | |
| 54 | ||
| 55 | /* | |
| 56 | * write to PCI config space and transfer it to MSR write. | |
| 57 | */ | |
| 58 | void cs5536_pci_conf_write4(int function, int reg, u32 value) | |
| 59 | { | |
| 60 | if ((function <= CS5536_FUNC_START) || (function >= CS5536_FUNC_END)) | |
| 61 | return; | |
| 62 | if ((reg < 0) || (reg > 0x100) || ((reg & 0x03) != 0)) | |
| 63 | return; | |
| 64 | ||
| 65 | if (vsm_conf_write[function] != NULL) | |
| 66 | vsm_conf_write[function](reg, value); | |
| 67 | } | |
| 68 | ||
| 69 | /* | |
| 70 | * read PCI config space and transfer it to MSR access. | |
| 71 | */ | |
| 72 | u32 cs5536_pci_conf_read4(int function, int reg) | |
| 73 | { | |
| 74 | u32 data = 0; | |
| 75 | ||
| 76 | if ((function <= CS5536_FUNC_START) || (function >= CS5536_FUNC_END)) | |
| 77 | return 0; | |
| 78 | if ((reg < 0) || ((reg & 0x03) != 0)) | |
| 79 | return 0; | |
| 80 | if (reg > 0x100) | |
| 81 | return 0xffffffff; | |
| 82 | ||
| 83 | if (vsm_conf_read[function] != NULL) | |
| 84 | data = vsm_conf_read[function](reg); | |
| 85 | ||
| 86 | return data; | |
| 87 | } |