1 | /* |
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2 | * pci.c : this file contains basic PCI Io functions. |
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3 | * |
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4 | * CopyRight (C) 1999 valette@crf.canon.fr |
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5 | * |
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6 | * This code is heavilly inspired by the public specification of STREAM V2 |
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7 | * that can be found at : |
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8 | * |
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9 | * <http://www.chorus.com/Documentation/index.html> by following |
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10 | * the STREAM API Specification Document link. |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/rtems/license.html. |
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15 | * |
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16 | * pci.c,v 1.2 2002/05/14 17:10:16 joel Exp |
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17 | * |
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18 | * Copyright 2004, Brookhaven National Laboratory and |
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19 | * Shuchen K. Feng, <feng1@bnl.gov>, 2004 |
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20 | * - modified and added support for MVME5500 board |
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21 | * - added 2nd PCI support for the mvme5500/GT64260 PCI bridge |
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22 | * - added bus support for the expansion of PMCSpan, thanks to |
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23 | * Peter Dufault (dufault@hda.com) for inputs. |
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24 | * |
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25 | * $Id$ |
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26 | */ |
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27 | #define PCI_MAIN |
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28 | |
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29 | #include <libcpu/io.h> |
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30 | #include <rtems/bspIo.h> /* printk */ |
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31 | |
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32 | #include <bsp/pci.h> |
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33 | #include <bsp/gtreg.h> |
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34 | #include <bsp/gtpcireg.h> |
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35 | |
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36 | #include <stdio.h> |
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37 | #include <string.h> |
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38 | |
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39 | #define PCI_DEBUG 0 |
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40 | #define PCI_PRINT 0 |
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41 | |
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42 | /* allow for overriding these definitions */ |
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43 | #ifndef PCI_CONFIG_ADDR |
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44 | #define PCI_CONFIG_ADDR 0xcf8 |
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45 | #endif |
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46 | #ifndef PCI_CONFIG_DATA |
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47 | #define PCI_CONFIG_DATA 0xcfc |
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48 | #endif |
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49 | |
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50 | #ifndef PCI1_CONFIG_ADDR |
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51 | #define PCI1_CONFIG_ADDR 0xc78 |
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52 | #endif |
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53 | #ifndef PCI1_CONFIG_DATA |
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54 | #define PCI1_CONFIG_DATA 0xc7c |
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55 | #endif |
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56 | |
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57 | #define PCI_INVALID_VENDORDEVICEID 0xffffffff |
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58 | #define PCI_MULTI_FUNCTION 0x80 |
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59 | #define HOSTBRIDGET_ERROR 0xf0000000 |
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60 | |
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61 | /* define a shortcut */ |
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62 | #define pci BSP_pci_configuration |
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63 | |
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64 | static int numPCIDevs=0; |
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65 | extern void pci_interface(); |
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66 | |
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67 | /* Pack RegNum,FuncNum,DevNum,BusNum,and ConfigEnable for |
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68 | * PCI Configuration Address Register |
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69 | */ |
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70 | #define pciConfigPack(bus,dev,func,offset)\ |
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71 | (((func&7)<<8)|((dev&0x1f )<<11)|(( bus&0xff)<<16)|(offset&0xfc))|0x80000000 |
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72 | |
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73 | /* |
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74 | * Bit encode for PCI_CONFIG_HEADER_TYPE register |
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75 | */ |
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76 | unsigned char ucMaxPCIBus=0; |
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77 | |
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78 | /* Please note that PCI0 and PCI1 does not correlate with the busNum 0 and 1. |
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79 | */ |
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80 | static int direct_pci_read_config_byte(unsigned char bus,unsigned char dev,unsigned char func, |
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81 | unsigned char offset,unsigned char *val) |
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82 | { |
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83 | volatile unsigned char *config_addr, *config_data; |
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84 | |
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85 | if (bus>= BSP_MAX_PCI_BUS_ON_PCI0) { |
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86 | bus-=BSP_MAX_PCI_BUS_ON_PCI0; |
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87 | config_addr = (volatile unsigned char*) PCI1_CONFIG_ADDR; |
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88 | config_data = (volatile unsigned char*) PCI1_CONFIG_DATA; |
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89 | } |
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90 | else { |
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91 | config_addr = pci.pci_config_addr; |
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92 | config_data = pci.pci_config_data; |
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93 | } |
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94 | *val = 0xff; |
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95 | if (offset & ~0xff) return PCIBIOS_BAD_REGISTER_NUMBER; |
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96 | #if 0 |
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97 | printk("addr %x, data %x, pack %x \n", config_addr, |
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98 | config_data,pciConfigPack(bus,dev,func,offset)); |
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99 | #endif |
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100 | outl(pciConfigPack(bus,dev,func,offset),config_addr); |
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101 | *val = inb(config_data + (offset&3)); |
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102 | return PCIBIOS_SUCCESSFUL; |
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103 | } |
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104 | |
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105 | static int direct_pci_read_config_word(unsigned char bus, unsigned char dev, |
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106 | unsigned char func, unsigned char offset, unsigned short *val) |
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107 | { |
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108 | volatile unsigned char *config_addr, *config_data; |
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109 | |
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110 | if (bus>= BSP_MAX_PCI_BUS_ON_PCI0) { |
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111 | bus-=BSP_MAX_PCI_BUS_ON_PCI0; |
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112 | config_addr = (volatile unsigned char*) PCI1_CONFIG_ADDR; |
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113 | config_data = (volatile unsigned char*) PCI1_CONFIG_DATA; |
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114 | } |
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115 | else { |
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116 | config_addr = (volatile unsigned char*) pci.pci_config_addr; |
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117 | config_data = (volatile unsigned char*) pci.pci_config_data; |
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118 | } |
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119 | |
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120 | *val = 0xffff; |
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121 | if ((offset&1)|| (offset & ~0xff)) return PCIBIOS_BAD_REGISTER_NUMBER; |
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122 | #if 0 |
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123 | printk("addr %x, data %x, pack %x \n", config_addr, |
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124 | config_data,pciConfigPack(bus,dev,func,offset)); |
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125 | #endif |
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126 | outl(pciConfigPack(bus,dev,func,offset),config_addr); |
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127 | *val = inw(config_data + (offset&2)); |
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128 | return PCIBIOS_SUCCESSFUL; |
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129 | } |
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130 | |
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131 | static int direct_pci_read_config_dword(unsigned char bus, unsigned char dev, |
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132 | unsigned char func, unsigned char offset, unsigned int *val) |
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133 | { |
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134 | volatile unsigned char *config_addr, *config_data; |
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135 | |
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136 | if (bus>= BSP_MAX_PCI_BUS_ON_PCI0) { |
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137 | bus-=BSP_MAX_PCI_BUS_ON_PCI0; |
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138 | config_addr = (volatile unsigned char*) PCI1_CONFIG_ADDR; |
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139 | config_data = (volatile unsigned char*) PCI1_CONFIG_DATA; |
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140 | } |
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141 | else { |
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142 | config_addr = (volatile unsigned char*) pci.pci_config_addr; |
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143 | config_data = (volatile unsigned char*) pci.pci_config_data; |
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144 | } |
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145 | |
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146 | *val = 0xffffffff; |
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147 | if ((offset&3)|| (offset & ~0xff)) return PCIBIOS_BAD_REGISTER_NUMBER; |
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148 | #if 0 |
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149 | printk("addr %x, data %x, pack %x \n", config_addr, |
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150 | pci.pci_config_data,pciConfigPack(bus,dev,func,offset)); |
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151 | #endif |
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152 | outl(pciConfigPack(bus,dev,func,offset),config_addr); |
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153 | *val = inl(config_data); |
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154 | return PCIBIOS_SUCCESSFUL; |
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155 | } |
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156 | |
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157 | static int direct_pci_write_config_byte(unsigned char bus, unsigned char dev,unsigned char func, unsigned char offset, unsigned char val) |
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158 | { |
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159 | volatile unsigned char *config_addr, *config_data; |
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160 | |
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161 | if (bus>= BSP_MAX_PCI_BUS_ON_PCI0) { |
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162 | bus-=BSP_MAX_PCI_BUS_ON_PCI0; |
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163 | config_addr = (volatile unsigned char*) PCI1_CONFIG_ADDR; |
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164 | config_data = (volatile unsigned char*) PCI1_CONFIG_DATA; |
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165 | } |
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166 | else { |
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167 | config_addr = pci.pci_config_addr; |
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168 | config_data = pci.pci_config_data; |
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169 | } |
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170 | |
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171 | if (offset & ~0xff) return PCIBIOS_BAD_REGISTER_NUMBER; |
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172 | #if 0 |
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173 | printk("addr %x, data %x, pack %x \n", config_addr, |
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174 | config_data,pciConfigPack(bus,dev,func,offset)); |
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175 | #endif |
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176 | |
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177 | outl(pciConfigPack(bus,dev,func,offset), config_addr); |
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178 | outb(val, config_data + (offset&3)); |
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179 | return PCIBIOS_SUCCESSFUL; |
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180 | } |
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181 | |
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182 | static int direct_pci_write_config_word(unsigned char bus, unsigned char dev,unsigned char func, unsigned char offset, unsigned short val) |
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183 | { |
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184 | volatile unsigned char *config_addr, *config_data; |
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185 | |
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186 | if (bus>= BSP_MAX_PCI_BUS_ON_PCI0) { |
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187 | bus-=BSP_MAX_PCI_BUS_ON_PCI0; |
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188 | config_addr = (volatile unsigned char*) PCI1_CONFIG_ADDR; |
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189 | config_data = (volatile unsigned char*) PCI1_CONFIG_DATA; |
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190 | } |
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191 | else { |
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192 | config_addr = (volatile unsigned char*) pci.pci_config_addr; |
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193 | config_data = (volatile unsigned char*) pci.pci_config_data; |
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194 | } |
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195 | |
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196 | if ((offset&1)|| (offset & ~0xff)) return PCIBIOS_BAD_REGISTER_NUMBER; |
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197 | #if 0 |
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198 | printk("addr %x, data %x, pack %x \n", config_addr, |
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199 | config_data,pciConfigPack(bus,dev,func,offset)); |
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200 | #endif |
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201 | outl(pciConfigPack(bus,dev,func,offset),config_addr); |
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202 | outw(val, config_data + (offset&3)); |
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203 | return PCIBIOS_SUCCESSFUL; |
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204 | } |
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205 | |
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206 | static int direct_pci_write_config_dword(unsigned char bus,unsigned char dev,unsigned char func, unsigned char offset, unsigned int val) |
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207 | { |
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208 | volatile unsigned char *config_addr, *config_data; |
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209 | |
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210 | if (bus>= BSP_MAX_PCI_BUS_ON_PCI0) { |
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211 | bus-=BSP_MAX_PCI_BUS_ON_PCI0; |
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212 | config_addr = (volatile unsigned char *) PCI1_CONFIG_ADDR; |
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213 | config_data = (volatile unsigned char *) PCI1_CONFIG_DATA; |
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214 | } |
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215 | else { |
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216 | config_addr = (volatile unsigned char*) pci.pci_config_addr; |
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217 | config_data = (volatile unsigned char*) pci.pci_config_data; |
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218 | } |
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219 | |
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220 | if ((offset&3)|| (offset & ~0xff)) return PCIBIOS_BAD_REGISTER_NUMBER; |
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221 | #if 0 |
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222 | printk("addr %x, data %x, pack %x \n", config_addr, |
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223 | config_data,pciConfigPack(bus,dev,func,offset)); |
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224 | #endif |
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225 | outl(pciConfigPack(bus,dev,func,offset),config_addr); |
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226 | outl(val,config_data); |
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227 | return PCIBIOS_SUCCESSFUL; |
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228 | } |
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229 | |
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230 | const pci_config_access_functions pci_direct_functions = { |
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231 | direct_pci_read_config_byte, |
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232 | direct_pci_read_config_word, |
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233 | direct_pci_read_config_dword, |
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234 | direct_pci_write_config_byte, |
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235 | direct_pci_write_config_word, |
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236 | direct_pci_write_config_dword |
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237 | }; |
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238 | |
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239 | |
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240 | pci_config BSP_pci_configuration = {(volatile unsigned char*) PCI_CONFIG_ADDR, |
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241 | (volatile unsigned char*)PCI_CONFIG_DATA, |
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242 | &pci_direct_functions}; |
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243 | |
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244 | /* |
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245 | * This routine determines the maximum bus number in the system. |
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246 | * The PCI_SUBORDINATE_BUS is not supported in GT6426xAB. Thus, |
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247 | * it's not used. |
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248 | * |
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249 | */ |
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250 | int pci_initialize() |
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251 | { |
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252 | int deviceFound; |
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253 | unsigned char ucBusNumber, ucSlotNumber, ucFnNumber, ucNumFuncs; |
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254 | unsigned int ulHeader; |
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255 | unsigned int pcidata, ulClass, ulDeviceID; |
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256 | |
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257 | pci_interface(); |
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258 | |
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259 | /* |
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260 | * Scan PCI0 and PCI1 buses |
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261 | */ |
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262 | for (ucBusNumber=0; ucBusNumber<BSP_MAX_PCI_BUS; ucBusNumber++) { |
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263 | deviceFound=0; |
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264 | for (ucSlotNumber=0;ucSlotNumber<PCI_MAX_DEVICES;ucSlotNumber++) { |
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265 | ucFnNumber = 0; |
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266 | pci_read_config_dword(ucBusNumber, |
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267 | ucSlotNumber, |
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268 | 0, |
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269 | PCI_VENDOR_ID, |
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270 | &ulDeviceID); |
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271 | |
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272 | if( ulDeviceID==PCI_INVALID_VENDORDEVICEID) { |
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273 | /* This slot is empty */ |
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274 | continue; |
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275 | } |
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276 | |
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277 | if (++numPCIDevs > PCI_MAX_DEVICES) { |
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278 | BSP_panic("Too many PCI devices found; increase PCI_MAX_DEVICES in pci.h\n"); |
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279 | } |
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280 | |
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281 | if (!deviceFound) deviceFound=1; |
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282 | switch(ulDeviceID) { |
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283 | case (PCI_VENDOR_ID_MARVELL+(PCI_DEVICE_ID_MARVELL_GT6426xAB<<16)): |
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284 | #if PCI_PRINT |
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285 | printk("Marvell GT6426xA/B hostbridge detected at bus%d slot%d\n", |
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286 | ucBusNumber,ucSlotNumber); |
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287 | #endif |
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288 | break; |
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289 | case (PCI_VENDOR_ID_PLX2+(PCI_DEVICE_ID_PLX2_PCI6154_HB2<<16)): |
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290 | #if PCI_PRINT |
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291 | printk("PLX PCI6154 PCI-PCI bridge detected at bus%d slot%d\n", |
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292 | ucBusNumber,ucSlotNumber); |
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293 | #endif |
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294 | break; |
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295 | case PCI_VENDOR_ID_TUNDRA: |
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296 | #if PCI_PRINT |
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297 | printk("TUNDRA PCI-VME bridge detected at bus%d slot%d\n", |
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298 | ucBusNumber,ucSlotNumber); |
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299 | #endif |
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300 | break; |
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301 | case (PCI_VENDOR_ID_INTEL+(PCI_DEVICE_INTEL_82544EI_COPPER<<16)): |
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302 | #if PCI_PRINT |
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303 | printk("INTEL 82544EI COPPER network controller detected at bus%d slot%d\n", |
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304 | ucBusNumber,ucSlotNumber); |
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305 | #endif |
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306 | break; |
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307 | case (PCI_VENDOR_ID_DEC+(PCI_DEVICE_ID_DEC_21150<<16)): |
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308 | #if PCI_PRINT |
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309 | printk("DEC21150 PCI-PCI bridge detected at bus%d slot%d\n", |
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310 | ucBusNumber,ucSlotNumber); |
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311 | #endif |
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312 | break; |
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313 | default : |
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314 | printk("BSP unlisted vendor, Bus%d Slot%d DeviceID 0x%x \n", |
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315 | ucBusNumber,ucSlotNumber, ulDeviceID); |
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316 | break; |
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317 | } |
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318 | |
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319 | #if PCI_DEBUG |
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320 | pci_read_config_dword(ucBusNumber, |
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321 | ucSlotNumber, |
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322 | 0, |
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323 | PCI_BASE_ADDRESS_0, |
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324 | &data); |
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325 | printk("Bus%d BASE_ADDRESS_0 0x%x \n",ucBusNumber, data); |
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326 | pci_read_config_dword(ucBusNumber, |
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327 | ucSlotNumber, |
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328 | 0, |
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329 | PCI_BASE_ADDRESS_1, |
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330 | &data); |
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331 | printk("Bus%d BASE_ADDRESS_1 0x%x \n",ucBusNumber, data); |
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332 | pci_read_config_dword(ucBusNumber, |
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333 | ucSlotNumber, |
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334 | 0, |
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335 | PCI_BASE_ADDRESS_2, |
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336 | &data); |
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337 | printk("Bus%d BASE_ADDRESS_2 0x%x \n", ucBusNumber, data); |
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338 | |
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339 | pci_read_config_dword(ucBusNumber, |
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340 | ucSlotNumber, |
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341 | 0, |
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342 | PCI_BASE_ADDRESS_3, |
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343 | &data); |
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344 | printk("Bus%d BASE_ADDRESS_3 0x%x \n", ucBusNumber, data); |
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345 | |
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346 | pci_read_config_word(ucBusNumber, |
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347 | ucSlotNumber, |
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348 | 0, |
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349 | PCI_INTERRUPT_LINE, |
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350 | &sdata); |
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351 | printk("Bus%d INTERRUPT_LINE 0x%x \n", ucBusNumber, sdata); |
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352 | |
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353 | /* We always enable internal memory. */ |
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354 | pci_read_config_dword(ucBusNumber, |
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355 | ucSlotNumber, |
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356 | 0, |
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357 | PCI_MEM_BASE_ADDR, |
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358 | &pcidata); |
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359 | printk("Bus%d MEM_BASE_ADDR 0x%x \n", ucBusNumber,pcidata); |
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360 | |
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361 | /* We always enable internal IO. */ |
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362 | pci_read_config_dword(ucBusNumber, |
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363 | ucSlotNumber, |
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364 | 0, |
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365 | PCI_IO_BASE_ADDR, |
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366 | &pcidata); |
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367 | printk("Bus%d IO_BASE_ADDR 0x%x \n", ucBusNumber,pcidata); |
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368 | #endif |
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369 | |
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370 | pci_read_config_dword(ucBusNumber, |
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371 | ucSlotNumber, |
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372 | 0, |
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373 | PCI_CACHE_LINE_SIZE, |
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374 | &ulHeader); |
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375 | if ((ulHeader>>16)&PCI_MULTI_FUNCTION) |
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376 | ucNumFuncs=PCI_MAX_FUNCTIONS; |
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377 | else |
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378 | ucNumFuncs=1; |
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379 | |
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380 | #if PCI_DEBUG |
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381 | printk("Bus%d Slot 0x%x HEADER/LAT/CACHE 0x%x \n", |
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382 | ucBusNumber, ucSlotNumber, ulHeader); |
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383 | #endif |
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384 | |
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385 | for (ucFnNumber=1;ucFnNumber<ucNumFuncs;ucFnNumber++) { |
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386 | pci_read_config_dword(ucBusNumber, |
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387 | ucSlotNumber, |
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388 | ucFnNumber, |
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389 | PCI_VENDOR_ID, |
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390 | &ulDeviceID); |
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391 | if (ulDeviceID==PCI_INVALID_VENDORDEVICEID) { |
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392 | /* This slot/function is empty */ |
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393 | continue; |
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394 | } |
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395 | |
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396 | /* This slot/function has a device fitted.*/ |
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397 | pci_read_config_dword(ucBusNumber, |
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398 | ucSlotNumber, |
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399 | ucFnNumber, |
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400 | PCI_CLASS_REVISION, |
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401 | &ulClass); |
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402 | #if PCI_DEBUG |
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403 | printk("Bus%d Slot 0x%x Func %d classID 0x%x \n",ucBusNumber,ucSlotNumber, |
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404 | ucFnNumber, ulClass); |
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405 | #endif |
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406 | |
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407 | } |
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408 | |
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409 | pci_read_config_dword(ucBusNumber, |
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410 | ucSlotNumber, |
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411 | 0, |
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412 | PCI_COMMAND, |
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413 | &pcidata); |
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414 | #if PCI_DEBUG |
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415 | printk("MOTLoad command staus 0x%x, ", pcidata); |
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416 | #endif |
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417 | /* Clear the error on the host bridge */ |
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418 | if ( (ucBusNumber==0) && (ucSlotNumber==0)) |
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419 | pcidata |= PCI_STATUS_CLRERR_MASK; |
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420 | /* Enable bus,I/O and memory master access. */ |
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421 | pcidata |= (PCI_COMMAND_MASTER|PCI_COMMAND_IO|PCI_COMMAND_MEMORY); |
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422 | pci_write_config_dword(ucBusNumber, |
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423 | ucSlotNumber, |
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424 | 0, |
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425 | PCI_COMMAND, |
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426 | pcidata); |
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427 | |
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428 | pci_read_config_dword(ucBusNumber, |
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429 | ucSlotNumber, |
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430 | 0, |
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431 | PCI_COMMAND, |
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432 | &pcidata); |
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433 | #if PCI_DEBUG |
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434 | printk("Now command/staus 0x%x\n", pcidata); |
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435 | #endif |
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436 | } |
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437 | if (deviceFound) ucMaxPCIBus++; |
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438 | } /* for (ucBusNumber=0; ucBusNumber<BSP_MAX_PCI_BUS; ... */ |
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439 | #if PCI_DEBUG |
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440 | printk("number of PCI buses: %d, numPCIDevs %d\n", |
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441 | pci_bus_count(), numPCIDevs); |
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442 | #endif |
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443 | return(0); |
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444 | } |
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445 | |
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446 | void FixupPCI( struct _int_map *bspmap, int (*swizzler)(int,int) ) |
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447 | { |
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448 | } |
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449 | |
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450 | /* |
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451 | * Return the number of PCI buses in the system |
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452 | */ |
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453 | unsigned char pci_bus_count() |
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454 | { |
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455 | return(ucMaxPCIBus); |
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456 | } |
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457 | |
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