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444 | serge | 1 | $Revision: 431 $ |
2 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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3 | ;; ;; |
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4 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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5 | ;; Distributed under terms of the GNU General Public License ;; |
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6 | ;; ;; |
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7 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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8 | |||
261 | hidnplayr | 9 | ;*************************************************************************** |
10 | ; |
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11 | ; PCI CODE FOLLOWS |
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12 | ; |
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13 | ; the following functions provide access to the PCI interface. |
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14 | ; These functions are used by scan_bus, and also some ethernet drivers |
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15 | ; |
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16 | ;*************************************************************************** |
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17 | |||
18 | ; PCI Bus defines |
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302 | hidnplayr | 19 | PCI_HEADER_TYPE equ 0x0e ;8 bit |
20 | PCI_BASE_ADDRESS_0 equ 0x10 ;32 bit |
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21 | PCI_BASE_ADDRESS_5 equ 0x24 ;32 bits |
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261 | hidnplayr | 22 | PCI_BASE_ADDRESS_SPACE_IO equ 0x01 |
302 | hidnplayr | 23 | PCI_VENDOR_ID equ 0x00 ;16 bit |
261 | hidnplayr | 24 | PCI_BASE_ADDRESS_IO_MASK equ 0xFFFFFFFC |
25 | |||
26 | ;*************************************************************************** |
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27 | ; Function |
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28 | ; config_cmd |
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29 | ; |
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30 | ; Description |
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31 | ; creates a command dword for use with the PCI bus |
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32 | ; bus # in ebx |
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33 | ; devfn in ecx |
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34 | ; where in edx |
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35 | ; |
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36 | ; command dword returned in eax |
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37 | ; Only eax destroyed |
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38 | ;*************************************************************************** |
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39 | config_cmd: |
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40 | push ecx |
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41 | mov eax, ebx |
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42 | shl eax, 16 |
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302 | hidnplayr | 43 | or eax, 0x80000000 |
261 | hidnplayr | 44 | shl ecx, 8 |
302 | hidnplayr | 45 | or eax, ecx |
261 | hidnplayr | 46 | pop ecx |
302 | hidnplayr | 47 | or eax, edx |
261 | hidnplayr | 48 | and eax, 0xFFFFFFFC |
49 | ret |
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50 | |||
51 | ;*************************************************************************** |
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52 | ; Function |
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53 | ; pcibios_read_config_byte |
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54 | ; |
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55 | ; Description |
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56 | ; reads a byte from the PCI config space |
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57 | ; bus # in ebx |
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58 | ; devfn in ecx |
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59 | ; where in edx ( ls 16 bits significant ) |
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60 | ; |
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61 | ; byte returned in al ( rest of eax zero ) |
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62 | ; Only eax/edx destroyed |
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63 | ;*************************************************************************** |
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64 | pcibios_read_config_byte: |
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65 | call config_cmd |
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66 | push dx |
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67 | mov dx, 0xCF8 |
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68 | out dx, eax |
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69 | pop dx |
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70 | |||
71 | xor eax, eax |
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72 | and dx, 0x03 |
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73 | add dx, 0xCFC |
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74 | ; and dx, 0xFFC |
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302 | hidnplayr | 75 | in al, dx |
261 | hidnplayr | 76 | ret |
77 | |||
78 | ;*************************************************************************** |
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79 | ; Function |
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80 | ; pcibios_read_config_word |
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81 | ; |
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82 | ; Description |
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83 | ; reads a word from the PCI config space |
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84 | ; bus # in ebx |
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85 | ; devfn in ecx |
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86 | ; where in edx ( ls 16 bits significant ) |
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87 | ; |
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88 | ; word returned in ax ( rest of eax zero ) |
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89 | ; Only eax/edx destroyed |
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90 | ;*************************************************************************** |
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91 | pcibios_read_config_word: |
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92 | call config_cmd |
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93 | push dx |
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94 | mov dx, 0xCF8 |
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95 | out dx, eax |
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96 | pop dx |
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97 | |||
98 | xor eax, eax |
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99 | and dx, 0x02 |
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100 | add dx, 0xCFC |
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101 | ; and dx, 0xFFC |
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302 | hidnplayr | 102 | in ax, dx |
261 | hidnplayr | 103 | ret |
104 | |||
105 | ;*************************************************************************** |
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106 | ; Function |
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107 | ; pcibios_read_config_dword |
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108 | ; |
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109 | ; Description |
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110 | ; reads a dword from the PCI config space |
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111 | ; bus # in ebx |
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112 | ; devfn in ecx |
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113 | ; where in edx ( ls 16 bits significant ) |
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114 | ; |
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115 | ; dword returned in eax |
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116 | ; Only eax/edx destroyed |
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117 | ;*************************************************************************** |
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118 | pcibios_read_config_dword: |
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119 | push edx |
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120 | call config_cmd |
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121 | push dx |
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122 | mov dx, 0xCF8 |
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123 | out dx, eax |
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124 | pop dx |
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125 | xor eax, eax |
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126 | mov dx, 0xCFC |
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302 | hidnplayr | 127 | in eax, dx |
261 | hidnplayr | 128 | pop edx |
129 | ret |
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130 | |||
131 | ;*************************************************************************** |
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132 | ; Function |
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133 | ; pcibios_write_config_byte |
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134 | ; |
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135 | ; Description |
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136 | ; write a byte in al to the PCI config space |
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137 | ; bus # in ebx |
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138 | ; devfn in ecx |
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139 | ; where in edx ( ls 16 bits significant ) |
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140 | ; |
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141 | ; Only eax/edx destroyed |
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142 | ;*************************************************************************** |
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143 | pcibios_write_config_byte: |
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144 | push ax |
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145 | call config_cmd |
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146 | push dx |
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147 | mov dx, 0xCF8 |
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148 | out dx, eax |
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149 | pop dx |
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150 | pop ax |
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151 | |||
152 | and dx, 0x03 |
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153 | add dx, 0xCFC |
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154 | out dx, al |
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155 | ret |
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156 | |||
157 | ;*************************************************************************** |
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158 | ; Function |
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159 | ; pcibios_write_config_word |
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160 | ; |
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161 | ; Description |
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162 | ; write a word in ax to the PCI config space |
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163 | ; bus # in ebx |
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164 | ; devfn in ecx |
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165 | ; where in edx ( ls 16 bits significant ) |
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166 | ; |
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167 | ; Only eax/edx destroyed |
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168 | ;*************************************************************************** |
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169 | pcibios_write_config_word: |
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170 | push ax |
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171 | call config_cmd |
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172 | push dx |
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173 | mov dx, 0xCF8 |
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174 | out dx, eax |
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175 | pop dx |
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176 | pop ax |
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177 | |||
178 | and dx, 0x02 |
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179 | add dx, 0xCFC |
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180 | out dx, ax |
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181 | ret |
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182 | |||
183 | ;*************************************************************************** |
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184 | ; Function |
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185 | ; delay_us |
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186 | ; |
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187 | ; Description |
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188 | ; delays for 30 to 60 us |
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189 | ; |
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190 | ; I would prefer this routine to be able to delay for |
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191 | ; a selectable number of microseconds, but this works for now. |
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192 | ; |
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193 | ; If you know a better way to do 2us delay, pleae tell me! |
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194 | ;*************************************************************************** |
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195 | delay_us: |
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196 | push eax |
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197 | push ecx |
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198 | |||
199 | mov ecx,2 |
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200 | |||
302 | hidnplayr | 201 | in al,0x61 |
261 | hidnplayr | 202 | and al,0x10 |
203 | mov ah,al |
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204 | cld |
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205 | |||
206 | dcnt1: |
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302 | hidnplayr | 207 | in al,0x61 |
261 | hidnplayr | 208 | and al,0x10 |
209 | cmp al,ah |
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302 | hidnplayr | 210 | jz dcnt1 |
261 | hidnplayr | 211 | |
212 | mov ah,al |
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213 | loop dcnt1 |
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214 | |||
215 | pop ecx |
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216 | pop eax |
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217 | |||
218 | ret |
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219 | |||
220 | ;*************************************************************************** |
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221 | ; Function |
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222 | ; scan_bus |
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223 | ; |
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224 | ; Description |
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225 | ; Scans the PCI bus for a supported device |
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226 | ; If a supported device is found, the drvr_ variables are initialised |
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227 | ; to that drivers functions ( as defined in the PCICards table) |
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228 | ; |
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229 | ; io_addr holds card I/O space. 32 bit, but only LS 16 bits valid |
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230 | ; pci_data holds the PCI vendor + device code |
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231 | ; pci_dev holds PCI bus dev # |
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232 | ; pci_bus holds PCI bus # |
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233 | ; |
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234 | ; io_addr will be zero if no card found |
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235 | ; |
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236 | ;*************************************************************************** |
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237 | scan_bus: |
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238 | xor eax, eax |
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239 | mov [hdrtype], al |
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240 | mov [pci_data], eax |
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241 | |||
302 | hidnplayr | 242 | xor ebx, ebx ; ebx = bus# 0 .. 255 |
261 | hidnplayr | 243 | |
244 | sb_bus_loop: |
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302 | hidnplayr | 245 | xor ecx, ecx ; ecx = devfn# 0 .. 254 ( not 255? ) |
261 | hidnplayr | 246 | |
247 | sb_devf_loop: |
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248 | mov eax, ecx |
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249 | and eax, 0x07 |
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250 | |||
251 | cmp eax, 0 |
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252 | jne sb_001 |
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253 | |||
254 | mov edx, PCI_HEADER_TYPE |
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255 | call pcibios_read_config_byte |
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256 | mov [hdrtype], al |
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257 | jmp sb_002 |
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258 | |||
259 | sb_001: |
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260 | mov al, [hdrtype] |
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261 | and al, 0x80 |
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262 | cmp al, 0x80 |
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263 | jne sb_inc_devf |
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264 | |||
265 | sb_002: |
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266 | mov edx, PCI_VENDOR_ID |
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267 | call pcibios_read_config_dword |
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268 | mov [vendor_device], eax |
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269 | cmp eax, 0xffffffff |
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302 | hidnplayr | 270 | je sb_empty |
261 | hidnplayr | 271 | cmp eax, 0 |
272 | jne sb_check_vendor |
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273 | |||
274 | sb_empty: |
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275 | mov [hdrtype], byte 0 |
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276 | jmp sb_inc_devf |
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277 | |||
278 | sb_check_vendor: |
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279 | ; iterate though PCICards until end or match found |
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280 | mov esi, PCICards |
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281 | |||
282 | sb_check: |
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283 | cmp [esi], dword 0 |
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302 | hidnplayr | 284 | je sb_inc_devf ; Quit if at last entry |
261 | hidnplayr | 285 | cmp eax, [esi] |
302 | hidnplayr | 286 | je sb_got_card |
261 | hidnplayr | 287 | add esi, PCICARDS_ENTRY_SIZE |
288 | jmp sb_check |
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289 | |||
290 | sb_got_card: |
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291 | ; indicate that we have found the card |
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292 | mov [pci_data], eax |
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293 | mov [pci_dev], ecx |
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294 | mov [pci_bus], ebx |
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295 | |||
296 | ; Define the driver functions |
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297 | push eax |
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298 | mov eax, [esi+4] |
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299 | mov [drvr_probe], eax |
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300 | mov eax, [esi+8] |
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301 | mov [drvr_reset], eax |
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302 | mov eax, [esi+12] |
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303 | mov [drvr_poll], eax |
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304 | mov eax, [esi+16] |
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305 | mov [drvr_transmit], eax |
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302 | hidnplayr | 306 | mov eax, [esi+20] |
307 | mov [drvr_cable], eax |
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261 | hidnplayr | 308 | pop eax |
309 | |||
310 | mov edx, PCI_BASE_ADDRESS_0 |
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311 | |||
312 | sb_reg_check: |
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313 | call pcibios_read_config_dword |
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314 | mov [io_addr], eax |
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315 | and eax, PCI_BASE_ADDRESS_IO_MASK |
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316 | cmp eax, 0 |
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302 | hidnplayr | 317 | je sb_inc_reg |
261 | hidnplayr | 318 | mov eax, [io_addr] |
319 | and eax, PCI_BASE_ADDRESS_SPACE_IO |
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320 | cmp eax, 0 |
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302 | hidnplayr | 321 | je sb_inc_reg |
261 | hidnplayr | 322 | |
323 | mov eax, [io_addr] |
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324 | and eax, PCI_BASE_ADDRESS_IO_MASK |
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325 | mov [io_addr], eax |
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326 | |||
327 | sb_exit1: |
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328 | ret |
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329 | |||
330 | sb_inc_reg: |
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331 | add edx, 4 |
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332 | cmp edx, PCI_BASE_ADDRESS_5 |
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333 | jbe sb_reg_check |
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334 | |||
335 | sb_inc_devf: |
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336 | inc ecx |
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337 | cmp ecx, 255 |
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302 | hidnplayr | 338 | jb sb_devf_loop |
261 | hidnplayr | 339 | inc ebx |
340 | cmp ebx, 256 |
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302 | hidnplayr | 341 | jb sb_bus_loop |
261 | hidnplayr | 342 | |
343 | ; We get here if we didn't find our card |
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344 | ; set io_addr to 0 as an indication |
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345 | xor eax, eax |
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346 | mov [io_addr], eax |
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347 | |||
348 | sb_exit2: |
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349 | ret |