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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
586 | serge | 2 | ;; ;; |
431 | serge | 3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;; ;; |
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586 | serge | 7 | ;; PCI32.INC ;; |
8 | ;; ;; |
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9 | ;; 32 bit PCI driver code ;; |
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10 | ;; ;; |
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11 | ;; Version 0.3 April 9, 2007 ;; |
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12 | ;; Version 0.2 December 21st, 2002 ;; |
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13 | ;; ;; |
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14 | ;; Author: Victor Prodan, victorprodan@yahoo.com ;; |
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15 | ;; Mihailov Ilia, ghost.nsk@gmail.com ;; |
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16 | ;; Credits: ;; |
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17 | ;; Ralf Brown ;; |
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18 | ;; Mike Hibbett, mikeh@oceanfree.net ;; |
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19 | ;; ;; |
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20 | ;; See file COPYING for details ;; |
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21 | ;; ;; |
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431 | serge | 22 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ha | 23 | |
750 | victor | 24 | $Revision: 750 $ |
1 | ha | 25 | |
26 | ;*************************************************************************** |
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27 | ; Function |
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28 | ; pci_api: |
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29 | ; |
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30 | ; Description |
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31 | ; entry point for system PCI calls |
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32 | ;*************************************************************************** |
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33 | |||
34 | align 4 |
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35 | |||
36 | pci_api: |
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37 | |||
38 | cmp [pci_access_enabled],1 |
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39 | jne no_pci_access_for_applications |
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40 | |||
41 | or al,al |
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42 | jnz pci_fn_1 |
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43 | ; PCI function 0: get pci version (AH.AL) |
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465 | serge | 44 | movzx eax,word [BOOT_VAR+0x9022] |
1 | ha | 45 | ret |
46 | |||
47 | pci_fn_1: |
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48 | cmp al,1 |
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49 | jnz pci_fn_2 |
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50 | |||
51 | ; PCI function 1: get last bus in AL |
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465 | serge | 52 | mov al,[BOOT_VAR+0x9021] |
1 | ha | 53 | ret |
54 | |||
55 | pci_fn_2: |
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56 | cmp al,2 |
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57 | jne pci_fn_3 |
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58 | ; PCI function 2: get pci access mechanism |
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465 | serge | 59 | mov al,[BOOT_VAR+0x9020] |
1 | ha | 60 | ret |
61 | pci_fn_3: |
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62 | |||
63 | cmp al,4 |
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64 | jz pci_read_reg ;byte |
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65 | cmp al,5 |
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66 | jz pci_read_reg ;word |
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67 | cmp al,6 |
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68 | jz pci_read_reg ;dword |
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69 | |||
70 | cmp al,8 |
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71 | jz pci_write_reg ;byte |
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72 | cmp al,9 |
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73 | jz pci_write_reg ;word |
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74 | cmp al,10 |
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75 | jz pci_write_reg ;dword |
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76 | |||
77 | no_pci_access_for_applications: |
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78 | |||
79 | mov eax,-1 |
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80 | |||
81 | ret |
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82 | |||
83 | ;*************************************************************************** |
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84 | ; Function |
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85 | ; pci_make_config_cmd |
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86 | ; |
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87 | ; Description |
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88 | ; creates a command dword for use with the PCI bus |
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89 | ; bus # in ah |
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90 | ; device+func in bh (dddddfff) |
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91 | ; register in bl |
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92 | ; |
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93 | ; command dword returned in eax ( 10000000 bbbbbbbb dddddfff rrrrrr00 ) |
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94 | ;*************************************************************************** |
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95 | |||
96 | align 4 |
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97 | |||
98 | pci_make_config_cmd: |
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99 | shl eax,8 ; move bus to bits 16-23 |
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100 | mov ax,bx ; combine all |
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101 | and eax,0xffffff |
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102 | or eax,0x80000000 |
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103 | ret |
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104 | |||
105 | ;*************************************************************************** |
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106 | ; Function |
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107 | ; pci_read_reg: |
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108 | ; |
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109 | ; Description |
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110 | ; read a register from the PCI config space into EAX/AX/AL |
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111 | ; IN: ah=bus,device+func=bh,register address=bl |
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112 | ; number of bytes to read (1,2,4) coded into AL, bits 0-1 |
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586 | serge | 113 | ; (0 - byte, 1 - word, 2 - dword) |
1 | ha | 114 | ;*************************************************************************** |
115 | |||
116 | align 4 |
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117 | |||
118 | pci_read_reg: |
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465 | serge | 119 | cmp byte [BOOT_VAR+0x9020],2 ;what mechanism will we use? |
1 | ha | 120 | je pci_read_reg_2 |
121 | |||
122 | ; mechanism 1 |
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123 | push esi ; save register size into ESI |
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124 | mov esi,eax |
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125 | and esi,3 |
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126 | |||
127 | call pci_make_config_cmd |
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128 | mov ebx,eax |
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129 | ; get current state |
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130 | mov dx,0xcf8 |
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131 | in eax, dx |
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132 | push eax |
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133 | ; set up addressing to config data |
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134 | mov eax,ebx |
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135 | and al,0xfc ; make address dword-aligned |
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136 | out dx,eax |
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137 | ; get requested DWORD of config data |
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138 | mov dl,0xfc |
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139 | and bl,3 |
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140 | or dl,bl ; add to port address first 2 bits of register address |
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141 | |||
142 | or esi,esi |
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143 | jz pci_read_byte1 |
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144 | cmp esi,1 |
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145 | jz pci_read_word1 |
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146 | cmp esi,2 |
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147 | jz pci_read_dword1 |
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148 | jmp pci_fin_read1 |
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149 | |||
150 | pci_read_byte1: |
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151 | in al,dx |
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152 | jmp pci_fin_read1 |
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153 | pci_read_word1: |
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154 | in ax,dx |
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155 | jmp pci_fin_read1 |
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156 | pci_read_dword1: |
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157 | in eax,dx |
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158 | jmp pci_fin_read1 |
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159 | pci_fin_read1: |
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160 | ; restore configuration control |
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161 | xchg eax,[esp] |
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162 | mov dx,0xcf8 |
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163 | out dx,eax |
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164 | |||
165 | pop eax |
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166 | pop esi |
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167 | ret |
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168 | pci_read_reg_2: |
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169 | |||
170 | test bh,128 ;mech#2 only supports 16 devices per bus |
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171 | jnz pci_read_reg_err |
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172 | |||
173 | push esi ; save register size into ESI |
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174 | mov esi,eax |
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175 | and esi,3 |
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176 | |||
177 | push eax |
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178 | ;store current state of config space |
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179 | mov dx,0xcf8 |
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180 | in al,dx |
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181 | mov ah,al |
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182 | mov dl,0xfa |
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183 | in al,dx |
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184 | |||
185 | xchg eax,[esp] |
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186 | ; out 0xcfa,bus |
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187 | mov al,ah |
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188 | out dx,al |
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189 | ; out 0xcf8,0x80 |
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190 | mov dl,0xf8 |
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191 | mov al,0x80 |
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192 | out dx,al |
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193 | ; compute addr |
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194 | shr bh,3 ; func is ignored in mechanism 2 |
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195 | or bh,0xc0 |
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196 | mov dx,bx |
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197 | |||
198 | or esi,esi |
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199 | jz pci_read_byte2 |
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200 | cmp esi,1 |
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201 | jz pci_read_word2 |
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202 | cmp esi,2 |
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203 | jz pci_read_dword2 |
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204 | jmp pci_fin_read2 |
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205 | |||
206 | pci_read_byte2: |
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207 | in al,dx |
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208 | jmp pci_fin_read2 |
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209 | pci_read_word2: |
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210 | in ax,dx |
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211 | jmp pci_fin_read2 |
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212 | pci_read_dword2: |
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213 | in eax,dx |
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214 | ; jmp pci_fin_read2 |
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215 | pci_fin_read2: |
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216 | |||
217 | ; restore configuration space |
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218 | xchg eax,[esp] |
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219 | mov dx,0xcfa |
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220 | out dx,al |
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221 | mov dl,0xf8 |
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222 | mov al,ah |
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223 | out dx,al |
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224 | |||
225 | pop eax |
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226 | pop esi |
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227 | ret |
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228 | |||
229 | pci_read_reg_err: |
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230 | xor eax,eax |
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231 | dec eax |
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232 | ret |
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233 | |||
234 | |||
235 | ;*************************************************************************** |
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236 | ; Function |
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237 | ; pci_write_reg: |
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238 | ; |
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239 | ; Description |
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240 | ; write a register from ECX/CX/CL into the PCI config space |
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241 | ; IN: ah=bus,device+func=bh,register address (dword aligned)=bl, |
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242 | ; value to write in ecx |
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243 | ; number of bytes to write (1,2,4) coded into AL, bits 0-1 |
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586 | serge | 244 | ; (0 - byte, 1 - word, 2 - dword) |
1 | ha | 245 | ;*************************************************************************** |
246 | |||
247 | align 4 |
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248 | |||
249 | pci_write_reg: |
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465 | serge | 250 | cmp byte [BOOT_VAR+0x9020],2 ;what mechanism will we use? |
1 | ha | 251 | je pci_write_reg_2 |
252 | |||
253 | ; mechanism 1 |
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254 | push esi ; save register size into ESI |
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255 | mov esi,eax |
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256 | and esi,3 |
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257 | |||
258 | call pci_make_config_cmd |
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259 | mov ebx,eax |
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260 | ; get current state into ecx |
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261 | mov dx,0xcf8 |
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262 | in eax, dx |
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263 | push eax |
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264 | ; set up addressing to config data |
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265 | mov eax,ebx |
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266 | and al,0xfc ; make address dword-aligned |
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267 | out dx,eax |
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268 | ; write DWORD of config data |
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269 | mov dl,0xfc |
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270 | and bl,3 |
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271 | or dl,bl |
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272 | mov eax,ecx |
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273 | |||
274 | or esi,esi |
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275 | jz pci_write_byte1 |
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276 | cmp esi,1 |
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277 | jz pci_write_word1 |
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278 | cmp esi,2 |
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279 | jz pci_write_dword1 |
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280 | jmp pci_fin_write1 |
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281 | |||
282 | pci_write_byte1: |
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283 | out dx,al |
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284 | jmp pci_fin_write1 |
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285 | pci_write_word1: |
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286 | out dx,ax |
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287 | jmp pci_fin_write1 |
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288 | pci_write_dword1: |
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289 | out dx,eax |
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290 | jmp pci_fin_write1 |
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291 | pci_fin_write1: |
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292 | |||
293 | ; restore configuration control |
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294 | pop eax |
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295 | mov dl,0xf8 |
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296 | out dx,eax |
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297 | |||
298 | xor eax,eax |
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299 | pop esi |
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300 | |||
301 | ret |
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302 | pci_write_reg_2: |
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303 | |||
304 | test bh,128 ;mech#2 only supports 16 devices per bus |
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305 | jnz pci_write_reg_err |
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306 | |||
307 | |||
308 | push esi ; save register size into ESI |
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309 | mov esi,eax |
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310 | and esi,3 |
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311 | |||
312 | push eax |
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313 | ;store current state of config space |
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314 | mov dx,0xcf8 |
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315 | in al,dx |
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316 | mov ah,al |
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317 | mov dl,0xfa |
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318 | in al,dx |
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319 | xchg eax,[esp] |
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320 | ; out 0xcfa,bus |
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321 | mov al,ah |
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322 | out dx,al |
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323 | ; out 0xcf8,0x80 |
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324 | mov dl,0xf8 |
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325 | mov al,0x80 |
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326 | out dx,al |
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327 | ; compute addr |
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328 | shr bh,3 ; func is ignored in mechanism 2 |
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329 | or bh,0xc0 |
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330 | mov dx,bx |
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331 | ; write register |
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332 | mov eax,ecx |
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333 | |||
334 | or esi,esi |
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335 | jz pci_write_byte2 |
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336 | cmp esi,1 |
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337 | jz pci_write_word2 |
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338 | cmp esi,2 |
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339 | jz pci_write_dword2 |
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340 | jmp pci_fin_write2 |
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341 | |||
342 | pci_write_byte2: |
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343 | out dx,al |
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344 | jmp pci_fin_write2 |
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345 | pci_write_word2: |
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346 | out dx,ax |
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347 | jmp pci_fin_write2 |
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348 | pci_write_dword2: |
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349 | out dx,eax |
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350 | jmp pci_fin_write2 |
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351 | pci_fin_write2: |
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352 | ; restore configuration space |
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353 | pop eax |
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354 | mov dx,0xcfa |
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355 | out dx,al |
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356 | mov dl,0xf8 |
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357 | mov al,ah |
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358 | out dx,al |
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359 | |||
360 | xor eax,eax |
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361 | pop esi |
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362 | ret |
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363 | |||
364 | pci_write_reg_err: |
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365 | xor eax,eax |
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366 | dec eax |
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367 | ret |
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586 | serge | 368 | |
369 | ;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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370 | |||
371 | ; VendID (2), DevID (2), Revision = 0 (1), Class Code (3), FNum (1), Bus (1) |
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372 | pci_emu_dat: times 30*10 db 0 |
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373 | |||
374 | ;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
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375 | align 4 |
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376 | sys_pcibios: |
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377 | xchg ebx, eax |
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378 | xchg ecx, eax |
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379 | xchg edx, eax |
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380 | xchg esi, eax |
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594 | diamond | 381 | xchg edi, eax |
382 | cmp [pci_access_enabled], 1 |
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383 | jne .unsupported_func |
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384 | cmp [pci_bios_entry], 0 |
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385 | jz .emulate_bios |
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586 | serge | 386 | |
594 | diamond | 387 | push ds |
388 | mov ax, pci_data_sel |
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389 | mov ds, ax |
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390 | mov eax, ebp |
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391 | mov ah, 0B1h |
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392 | call pword [cs:pci_bios_entry] |
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393 | pop ds |
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586 | serge | 394 | |
395 | jmp .return |
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396 | ;-=-=-=-=-=-=-=-= |
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397 | .emulate_bios: |
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398 | cmp ebp, 1 ; PCI_FUNCTION_ID |
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399 | jnz .not_PCI_BIOS_PRESENT |
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400 | mov edx, 'PCI ' |
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401 | mov al, [OS_BASE+0x2F0000 + 0x9020] |
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402 | mov bx, [OS_BASE+0x2F0000 + 0x9022] |
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403 | mov cl, [OS_BASE+0x2F0000 + 0x9021] |
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594 | diamond | 404 | xor ah, ah |
405 | jmp .return_abcd |
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586 | serge | 406 | |
407 | .not_PCI_BIOS_PRESENT: |
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408 | cmp ebp, 2 ; FIND_PCI_DEVICE |
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409 | jne .not_FIND_PCI_DEVICE |
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594 | diamond | 410 | mov ebx, pci_emu_dat |
411 | ..nxt: cmp [ebx], dx |
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586 | serge | 412 | jne ..no |
594 | diamond | 413 | cmp [ebx + 2], cx |
586 | serge | 414 | jne ..no |
594 | diamond | 415 | dec si |
586 | serge | 416 | jns ..no |
594 | diamond | 417 | mov bx, [ebx + 4] |
418 | xor ah, ah |
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419 | jmp .return_ab |
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420 | ..no: cmp word[ebx], 0 |
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586 | serge | 421 | je ..dev_not_found |
594 | diamond | 422 | add ebx, 10 |
586 | serge | 423 | jmp ..nxt |
424 | ..dev_not_found: |
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425 | mov ah, 0x86 ; DEVICE_NOT_FOUND |
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594 | diamond | 426 | jmp .return_a |
586 | serge | 427 | |
428 | .not_FIND_PCI_DEVICE: |
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429 | cmp ebp, 3 ; FIND_PCI_CLASS_CODE |
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430 | jne .not_FIND_PCI_CLASS_CODE |
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431 | mov esi, pci_emu_dat |
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594 | diamond | 432 | shl ecx, 8 |
433 | ..nxt2: cmp [esi], ecx |
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586 | serge | 434 | jne ..no2 |
435 | mov bx, [esi] |
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594 | diamond | 436 | xor ah, ah |
437 | jmp .return_ab |
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586 | serge | 438 | ..no2: cmp dword[esi], 0 |
594 | diamond | 439 | je ..dev_not_found |
586 | serge | 440 | add esi, 10 |
441 | jmp ..nxt2 |
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442 | |||
443 | .not_FIND_PCI_CLASS_CODE: |
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444 | cmp ebp, 8 ; READ_CONFIG_* |
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445 | jb .not_READ_CONFIG |
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446 | cmp ebp, 0x0A |
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447 | ja .not_READ_CONFIG |
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594 | diamond | 448 | mov eax, ebp |
449 | mov ah, bh |
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450 | mov edx, edi |
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451 | mov bh, bl |
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452 | mov bl, dl |
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586 | serge | 453 | call pci_read_reg |
454 | mov ecx, eax |
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455 | xor ah, ah ; SUCCESSFUL |
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594 | diamond | 456 | jmp .return_abc |
586 | serge | 457 | .not_READ_CONFIG: |
458 | cmp ebp, 0x0B ; WRITE_CONFIG_* |
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459 | jb .not_WRITE_CONFIG |
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460 | cmp ebp, 0x0D |
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461 | ja .not_WRITE_CONFIG |
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594 | diamond | 462 | lea eax, [ebp+1] |
463 | mov ah, bh |
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464 | mov edx, edi |
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465 | mov bh, bl |
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466 | mov bl, dl |
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586 | serge | 467 | call pci_write_reg |
468 | xor ah, ah ; SUCCESSFUL |
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594 | diamond | 469 | jmp .return_abc |
586 | serge | 470 | .not_WRITE_CONFIG: |
471 | .unsupported_func: |
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472 | mov ah, 0x81 ; FUNC_NOT_SUPPORTED |
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473 | .return:mov dword[esp + 8 ], edi |
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474 | mov dword[esp + 12], esi |
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594 | diamond | 475 | .return_abcd: |
586 | serge | 476 | mov dword[esp + 28], edx |
594 | diamond | 477 | .return_abc: |
586 | serge | 478 | mov dword[esp + 32], ecx |
594 | diamond | 479 | .return_ab: |
480 | mov dword[esp + 24], ebx |
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481 | .return_a: |
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586 | serge | 482 | mov dword[esp + 36], eax |
483 | ret |