1 /* 2 * Support for indirect PCI bridges. 3 * 4 * Copyright (C) 1998 Gabriel Paubert. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <common.h> 13 14 #if (!defined(__I386__) && !defined(CONFIG_IXDP425)) 15 16 #include <asm/processor.h> 17 #include <asm/io.h> 18 #include <pci.h> 19 20 #define cfg_read(val, addr, type, op) *val = op((type)(addr)) 21 #define cfg_write(val, addr, type, op) op((type *)(addr), (val)) 22 23 #ifdef CONFIG_IXP425 24 extern unsigned char in_8 (volatile unsigned *addr); 25 extern unsigned short in_le16 (volatile unsigned *addr); 26 extern unsigned in_le32 (volatile unsigned *addr); 27 extern void out_8 (volatile unsigned *addr, char val); 28 extern void out_le16 (volatile unsigned *addr, unsigned short val); 29 extern void out_le32 (volatile unsigned *addr, unsigned int val); 30 #endif /* CONFIG_IXP425 */ 31 32 #if defined(CONFIG_MPC8260) 33 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \ 34 static int \ 35 indirect_##rw##_config_##size(struct pci_controller *hose, \ 36 pci_dev_t dev, int offset, type val) \ 37 { \ 38 u32 b, d,f; \ 39 b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \ 40 b = b - hose->first_busno; \ 41 dev = PCI_BDF(b, d, f); \ 42 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \ 43 sync(); \ 44 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ 45 return 0; \ 46 } 47 #elif defined(CONFIG_E500) || defined(CONFIG_MPC86xx) 48 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \ 49 static int \ 50 indirect_##rw##_config_##size(struct pci_controller *hose, \ 51 pci_dev_t dev, int offset, type val) \ 52 { \ 53 u32 b, d,f; \ 54 b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \ 55 b = b - hose->first_busno; \ 56 dev = PCI_BDF(b, d, f); \ 57 *(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \ 58 sync(); \ 59 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ 60 return 0; \ 61 } 62 #elif defined(CONFIG_440GX) || defined(CONFIG_440GP) || defined(CONFIG_440SP) || \ 63 defined(CONFIG_440SPE) || defined(CONFIG_460EX) || defined(CONFIG_460GT) 64 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \ 65 static int \ 66 indirect_##rw##_config_##size(struct pci_controller *hose, \ 67 pci_dev_t dev, int offset, type val) \ 68 { \ 69 u32 b, d,f; \ 70 b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \ 71 b = b - hose->first_busno; \ 72 dev = PCI_BDF(b, d, f); \ 73 if (PCI_BUS(dev) > 0) \ 74 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000001); \ 75 else \ 76 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \ 77 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ 78 return 0; \ 79 } 80 #else 81 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \ 82 static int \ 83 indirect_##rw##_config_##size(struct pci_controller *hose, \ 84 pci_dev_t dev, int offset, type val) \ 85 { \ 86 u32 b, d,f; \ 87 b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \ 88 b = b - hose->first_busno; \ 89 dev = PCI_BDF(b, d, f); \ 90 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \ 91 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ 92 return 0; \ 93 } 94 #endif 95 96 #define INDIRECT_PCI_OP_ERRATA6(rw, size, type, op, mask) \ 97 static int \ 98 indirect_##rw##_config_##size(struct pci_controller *hose, \ 99 pci_dev_t dev, int offset, type val) \ 100 { \ 101 unsigned int msr = mfmsr(); \ 102 mtmsr(msr & ~(MSR_EE | MSR_CE)); \ 103 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \ 104 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ 105 out_le32(hose->cfg_addr, 0x00000000); \ 106 mtmsr(msr); \ 107 return 0; \ 108 } 109 110 INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3) 111 INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2) 112 INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0) 113 #ifdef CONFIG_405GP 114 INDIRECT_PCI_OP_ERRATA6(write, byte, u8, out_8, 3) 115 INDIRECT_PCI_OP_ERRATA6(write, word, u16, out_le16, 2) 116 INDIRECT_PCI_OP_ERRATA6(write, dword, u32, out_le32, 0) 117 #else 118 INDIRECT_PCI_OP(write, byte, u8, out_8, 3) 119 INDIRECT_PCI_OP(write, word, u16, out_le16, 2) 120 INDIRECT_PCI_OP(write, dword, u32, out_le32, 0) 121 #endif 122 123 void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data) 124 { 125 pci_set_ops(hose, 126 indirect_read_config_byte, 127 indirect_read_config_word, 128 indirect_read_config_dword, 129 indirect_write_config_byte, 130 indirect_write_config_word, 131 indirect_write_config_dword); 132 133 hose->cfg_addr = (unsigned int *) cfg_addr; 134 hose->cfg_data = (unsigned char *) cfg_data; 135 } 136 137 #endif /* !__I386__ && !CONFIG_IXDP425 */ 138