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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | format MS COFF |
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9 | |||
10 | DEBUG equ 1 |
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11 | |||
12 | include 'proc32.inc' |
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13 | include 'imports.inc' |
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14 | |||
15 | |||
16 | |||
17 | API_VERSION equ 0 |
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18 | UART_VERSION equ API_VERSION |
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19 | |||
20 | PG_SW equ 0x003 |
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21 | page_tabs equ 0xFDC00000 ;hack |
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22 | |||
23 | OS_BASE equ 0x80000000 |
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24 | SLOT_BASE equ (OS_BASE+0x0080000) |
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25 | TASK_COUNT equ (OS_BASE+0x0003004) |
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26 | CURRENT_TASK equ (OS_BASE+0x0003000) |
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27 | |||
28 | |||
29 | struc APPOBJ ;common object header |
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30 | { |
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31 | .magic dd ? ; |
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32 | .destroy dd ? ;internal destructor |
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33 | .fd dd ? ;next object in list |
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34 | .bk dd ? ;prev object in list |
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35 | .pid dd ? ;owner id |
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36 | }; |
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37 | |||
38 | virtual at 0 |
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39 | APPOBJ APPOBJ |
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40 | end virtual |
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41 | |||
42 | struc IOCTL |
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43 | { .handle dd ? |
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44 | .io_code dd ? |
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45 | .input dd ? |
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46 | .inp_size dd ? |
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47 | .output dd ? |
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48 | .out_size dd ? |
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49 | } |
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50 | |||
51 | virtual at 0 |
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52 | IOCTL IOCTL |
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53 | end virtual |
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54 | |||
55 | DEBUG equ 1 |
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56 | |||
57 | DRV_ENTRY equ 1 |
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58 | DRV_EXIT equ -1 |
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59 | |||
60 | THR_REG equ 0; x3f8 ;transtitter/reciever |
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61 | IER_REG equ 1; x3f9 ;interrupt enable |
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62 | IIR_REG equ 2; x3fA ;interrupt info |
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63 | LCR_REG equ 3; x3FB ;line control |
||
64 | MCR_REG equ 4; x3FC ;modem control |
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65 | LSR_REG equ 5; x3FD ;line status |
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66 | MSR_REG equ 6; x3FE ;modem status |
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67 | |||
68 | LCR_5BIT equ 0x00 |
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69 | LCR_6BIT equ 0x01 |
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70 | LCR_7BIT equ 0x02 |
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71 | LCR_8BIT equ 0x03 |
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72 | LCR_STOP_1 equ 0x00 |
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73 | LCR_STOP_2 equ 0x04 |
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74 | LCR_PARITY equ 0x08 |
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75 | LCR_EVEN equ 0x10 |
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76 | LCR_STICK equ 0x20 |
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77 | LCR_BREAK equ 0x40 |
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78 | LCR_DLAB equ 0x80 |
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79 | |||
80 | LSR_DR equ 0x01 ;data ready |
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81 | LSR_OE equ 0x02 ;overrun error |
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82 | LSR_PE equ 0x04 ;parity error |
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83 | LSR_FE equ 0x08 ;framing error |
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84 | LSR_BI equ 0x10 ;break interrupt |
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85 | LSR_THRE equ 0x20 ;transmitter holding empty |
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86 | LSR_TEMT equ 0x40 ;transmitter empty |
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87 | LSR_FER equ 0x80 ;FIFO error |
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88 | |||
89 | FCR_EFIFO equ 0x01 ;enable FIFO |
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90 | FCR_CRB equ 0x02 ;clear reciever FIFO |
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91 | FCR_CXMIT equ 0x04 ;clear transmitter FIFO |
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92 | FCR_RDY equ 0x08 ;set RXRDY and TXRDY pins |
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93 | FCR_FIFO_1 equ 0x00 ;1 byte trigger |
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94 | FCR_FIFO_4 equ 0x40 ;4 bytes trigger |
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95 | FCR_FIFO_8 equ 0x80 ;8 bytes trigger |
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96 | FCR_FIFO_14 equ 0xC0 ;14 bytes trigger |
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97 | |||
98 | IIR_INTR equ 0x01 ;1= no interrupts |
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99 | |||
100 | IER_RDAI equ 0x01 ;reciever data interrupt |
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101 | IER_THRI equ 0x02 ;transmitter empty interrupt |
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102 | IER_LSI equ 0x04 ;line status interrupt |
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103 | IER_MSI equ 0x08 ;modem status interrupt |
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104 | |||
105 | MCR_DTR equ 0x01 ;0-> DTR=1, 1-> DTR=0 |
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106 | MCR_RTS equ 0x02 ;0-> RTS=1, 1-> RTS=0 |
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107 | MCR_OUT_1 equ 0x04 ;0-> OUT1=1, 1-> OUT1=0 |
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108 | MCR_OUT_2 equ 0x08 ;0-> OUT2=1, 1-> OUT2=0; enable intr |
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109 | MCR_LOOP equ 0x10 ;lopback mode |
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110 | |||
111 | MSR_DCTS equ 0x01 ;delta clear to send |
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112 | MSR_DDSR equ 0x02 ;delta data set redy |
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113 | MSR_TERI equ 0x04 ;trailinh edge of ring |
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114 | MSR_DDCD equ 0x08 ;delta carrier detect |
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115 | |||
116 | |||
117 | RATE_50 equ 0 |
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118 | RATE_75 equ 1 |
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119 | RATE_110 equ 2 |
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120 | RATE_134 equ 3 |
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121 | RATE_150 equ 4 |
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122 | RATE_300 equ 5 |
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123 | RATE_600 equ 6 |
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124 | RATE_1200 equ 7 |
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125 | RATE_1800 equ 8 |
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126 | RATE_2000 equ 9 |
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127 | RATE_2400 equ 10 |
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128 | RATE_3600 equ 11 |
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129 | RATE_4800 equ 12 |
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130 | RATE_7200 equ 13 |
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131 | RATE_9600 equ 14 |
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132 | RATE_19200 equ 15 |
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133 | RATE_38400 equ 16 |
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134 | RATE_57600 equ 17 |
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135 | RATE_115200 equ 18 |
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136 | |||
137 | COM_1 equ 1 |
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138 | COM_2 equ 2 |
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139 | COM_3 equ 3 |
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140 | COM_4 equ 4 |
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141 | COM_MAX equ 2 ;only two port supported |
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142 | |||
143 | COM_1_BASE equ 0x3F8 |
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144 | COM_2_BASE equ 0x2F8 |
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145 | |||
146 | COM_1_IRQ equ 4 |
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147 | COM_2_IRQ equ 3 |
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148 | |||
149 | UART_CLOSED equ 0 |
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150 | UART_TRANSMIT equ 1 |
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151 | UART_STOP equ 2 |
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152 | |||
153 | struc UART |
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154 | { |
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155 | .lock dd ? |
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156 | .base dd ? |
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157 | .lcr_reg dd ? |
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158 | .mcr_reg dd ? |
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159 | .rate dd ? |
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160 | .mode dd ? |
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161 | .state dd ? |
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162 | |||
163 | .rcvr_buff dd ? |
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164 | .rcvr_rp dd ? |
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165 | .rcvr_wp dd ? |
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166 | .rcvr_count dd ? |
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167 | .rcvr_top dd ? |
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168 | |||
169 | .xmit_buff dd ? |
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170 | .xmit_rp dd ? |
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171 | .xmit_wp dd ? |
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172 | .xmit_count dd ? |
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173 | .xmit_free dd ? |
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174 | .xmit_top dd ? |
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175 | } |
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176 | virtual at 0 |
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177 | UART UART |
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178 | end virtual |
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179 | |||
180 | UART_SIZE equ 18*4 |
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181 | |||
182 | struc CONNECTION |
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183 | { |
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184 | .magic dd ? ;'CNCT' |
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185 | .destroy dd ? ;internal destructor |
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186 | .fd dd ? ;next object in list |
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187 | .bk dd ? ;prev object in list |
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188 | .pid dd ? ;owner id |
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189 | |||
190 | .id dd ? ;reserved |
||
191 | .uart dd ? ;uart pointer |
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192 | } |
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193 | |||
194 | virtual at 0 |
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195 | CONNECTION CONNECTION |
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196 | end virtual |
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197 | |||
198 | CONNECTION_SIZE equ 7*4 |
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199 | |||
200 | public START |
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201 | public service_proc |
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202 | public version |
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203 | |||
204 | section '.flat' code readable align 16 |
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205 | |||
206 | proc START stdcall, state:dword |
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207 | |||
208 | cmp [state], 1 |
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209 | jne .stop |
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210 | |||
211 | mov eax, UART_SIZE |
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212 | call Kmalloc |
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213 | test eax, eax |
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214 | jz .fail |
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215 | |||
216 | mov [com1], eax |
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217 | mov edi, eax |
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218 | mov ecx, UART_SIZE/4 |
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219 | xor eax, eax |
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220 | cld |
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221 | rep stosd |
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222 | |||
223 | mov eax, [com1] |
||
224 | mov [eax+UART.base], COM_1_BASE |
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225 | |||
226 | stdcall AllocKernelSpace, 32768 |
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227 | |||
228 | mov edi, [com1] |
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229 | mov edx, eax |
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230 | |||
231 | mov [edi+UART.rcvr_buff], eax |
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232 | add eax, 8192 |
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233 | mov [edi+UART.rcvr_top], eax |
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234 | add eax, 8192 |
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235 | mov [edi+UART.xmit_buff], eax |
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236 | add eax, 8192 |
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237 | mov [edi+UART.xmit_top], eax |
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238 | |||
239 | call AllocPage |
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240 | test eax, eax |
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241 | jz .fail |
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242 | |||
243 | shr edx, 12 |
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244 | or eax, PG_SW |
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245 | mov [page_tabs+edx*4], eax |
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246 | mov [page_tabs+edx*4+8], eax |
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247 | |||
248 | call AllocPage |
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249 | test eax, eax |
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250 | jz .fail |
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251 | |||
252 | or eax, PG_SW |
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253 | mov [page_tabs+edx*4+4], eax |
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254 | mov [page_tabs+edx*4+12], eax |
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255 | |||
256 | call AllocPage |
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257 | test eax, eax |
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258 | jz .fail |
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259 | |||
260 | or eax, PG_SW |
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261 | mov [page_tabs+edx*4+16], eax |
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262 | mov [page_tabs+edx*4+24], eax |
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263 | |||
264 | call AllocPage |
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265 | test eax, eax |
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266 | jz .fail |
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267 | |||
268 | or eax, PG_SW |
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269 | mov [page_tabs+edx*4+20], eax |
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270 | mov [page_tabs+edx*4+28], eax |
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271 | |||
272 | mov eax, [edi+UART.rcvr_buff] |
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273 | invlpg [eax] |
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274 | invlpg [eax+0x1000] |
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275 | invlpg [eax+0x2000] |
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276 | invlpg [eax+0x3000] |
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277 | invlpg [eax+0x4000] |
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278 | invlpg [eax+0x5000] |
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279 | invlpg [eax+0x6000] |
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280 | invlpg [eax+0x7000] |
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281 | |||
282 | mov eax, edi |
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283 | call uart_reset.internal ;eax= uart |
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284 | |||
285 | stdcall AttachIntHandler, COM_1_IRQ, com_1_isr, dword 0 |
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286 | stdcall RegService, sz_uart_srv, service_proc |
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287 | ret |
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288 | .fail: |
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289 | .stop: |
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290 | xor eax, eax |
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291 | ret |
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292 | endp |
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293 | |||
294 | |||
295 | handle equ IOCTL.handle |
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296 | io_code equ IOCTL.io_code |
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297 | input equ IOCTL.input |
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298 | inp_size equ IOCTL.inp_size |
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299 | output equ IOCTL.output |
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300 | out_size equ IOCTL.out_size |
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301 | |||
302 | SRV_GETVERSION equ 0 |
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303 | PORT_OPEN equ 1 |
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304 | PORT_CLOSE equ 2 |
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305 | PORT_RESET equ 3 |
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306 | PORT_SETMODE equ 4 |
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307 | PORT_GETMODE equ 5 |
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308 | PORT_SETMCR equ 6 |
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309 | PORT_GETMCR equ 7 |
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310 | PORT_READ equ 8 |
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311 | PORT_WRITE equ 9 |
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312 | |||
313 | align 4 |
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314 | proc service_proc stdcall, ioctl:dword |
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315 | |||
316 | mov ebx, [ioctl] |
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317 | mov eax, [ebx+io_code] |
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318 | cmp eax, PORT_WRITE |
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319 | ja .fail |
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320 | |||
321 | cmp eax, SRV_GETVERSION |
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322 | jne @F |
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323 | |||
324 | mov eax, [ebx+output] |
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325 | cmp [ebx+out_size], 4 |
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326 | jne .fail |
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327 | mov [eax], dword UART_VERSION |
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328 | xor eax, eax |
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329 | ret |
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330 | @@: |
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331 | cmp eax, PORT_OPEN |
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332 | jne @F |
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333 | |||
334 | cmp [ebx+out_size], 4 |
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335 | jne .fail |
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336 | |||
337 | mov ebx, [ebx+input] |
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338 | mov eax, [ebx] |
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339 | call uart_open |
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340 | mov ebx, [ioctl] |
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341 | mov ebx, [ebx+output] |
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342 | mov [ebx], ecx |
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343 | ret |
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344 | @@: |
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345 | mov esi, [ebx+input] ;input buffer |
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346 | mov edi, [ebx+output] |
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347 | call [uart_func+eax*4] |
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348 | ret |
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349 | .fail: |
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350 | or eax, -1 |
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351 | ret |
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352 | |||
353 | endp |
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354 | |||
355 | restore handle |
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356 | restore io_code |
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357 | restore input |
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358 | restore inp_size |
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359 | restore output |
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360 | restore out_size |
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361 | |||
362 | |||
363 | ; param |
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364 | ; esi= input buffer |
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365 | ; +0 connection |
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366 | ; |
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367 | ; retval |
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368 | ; eax= error code |
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369 | |||
370 | align 4 |
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371 | uart_reset: |
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372 | mov eax, [esi] |
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373 | cmp [eax+APPOBJ.magic], 'CNCT' |
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374 | jne .fail |
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375 | |||
376 | cmp [eax+APPOBJ.destroy], uart_close.destroy |
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377 | jne .fail |
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378 | |||
379 | mov eax, [eax+CONNECTION.uart] |
||
380 | test eax, eax |
||
381 | jz .fail |
||
382 | |||
383 | ; set mode 2400 bod 8-bit |
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384 | ; disable DTR & RTS |
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385 | ; clear FIFO |
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386 | ; clear pending interrupts |
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387 | ; |
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388 | ; param |
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389 | ; eax= uart |
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390 | |||
391 | align 4 |
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392 | .internal: |
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393 | mov esi, eax |
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394 | mov [eax+UART.state], UART_CLOSED |
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395 | mov edx, [eax+UART.base] |
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396 | add edx, MCR_REG |
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397 | xor eax, eax |
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398 | out dx, al ;clear DTR & RTS |
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399 | |||
400 | mov eax, esi |
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401 | mov ebx, RATE_2400 |
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402 | mov ecx, LCR_8BIT+LCR_STOP_1 |
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403 | call uart_set_mode.internal |
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404 | |||
405 | mov edx, [esi+UART.base] |
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406 | add edx, IIR_REG |
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407 | mov eax, FCR_EFIFO+FCR_CRB+FCR_CXMIT+FCR_FIFO_14 |
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408 | out dx, al |
||
409 | .clear_RB: |
||
410 | mov edx, [esi+UART.base] |
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411 | add edx, LSR_REG |
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412 | in al, dx |
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413 | test eax, LSR_DR |
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414 | jz @F |
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415 | |||
416 | mov edx, [esi+UART.base] |
||
417 | in al, dx |
||
418 | jmp .clear_RB |
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419 | @@: |
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420 | mov edx, [esi+UART.base] |
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421 | add edx, IER_REG |
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422 | mov eax, IER_RDAI+IER_THRI+IER_LSI |
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423 | out dx, al |
||
424 | .clear_IIR: |
||
425 | mov edx, [esi+UART.base] |
||
426 | add edx, IIR_REG |
||
427 | in al, dx |
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428 | test al, IIR_INTR |
||
429 | jnz .done |
||
430 | |||
431 | shr eax, 1 |
||
432 | and eax, 3 |
||
433 | jnz @F |
||
434 | |||
435 | mov edx, [esi+UART.base] |
||
436 | add edx, MSR_REG |
||
437 | in al, dx |
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438 | jmp .clear_IIR |
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439 | @@: |
||
440 | cmp eax, 1 |
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441 | je .clear_IIR |
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442 | |||
443 | cmp eax, 2 |
||
444 | jne @F |
||
445 | |||
446 | mov edx, [esi+UART.base] |
||
447 | in al, dx |
||
448 | jmp .clear_IIR |
||
449 | @@: |
||
450 | mov edx, [esi+UART.base] |
||
451 | add edx, LSR_REG |
||
452 | in al, dx |
||
453 | jmp .clear_IIR |
||
454 | .done: |
||
455 | mov edi, [esi+UART.rcvr_buff] |
||
456 | mov ecx, 8192/4 |
||
457 | xor eax, eax |
||
458 | |||
459 | mov [esi+UART.rcvr_rp], edi |
||
460 | mov [esi+UART.rcvr_wp], edi |
||
461 | mov [esi+UART.rcvr_count], eax |
||
462 | |||
463 | cld |
||
464 | rep stosd |
||
465 | |||
466 | mov edi, [esi+UART.xmit_buff] |
||
467 | mov ecx, 8192/4 |
||
468 | |||
469 | mov [esi+UART.xmit_rp], edi |
||
470 | mov [esi+UART.xmit_wp], edi |
||
471 | mov [esi+UART.xmit_count], eax |
||
472 | mov [esi+UART.xmit_free], 8192 |
||
473 | |||
474 | rep stosd |
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475 | ret ;eax= 0 |
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476 | .fail: |
||
477 | or eax, -1 |
||
478 | ret |
||
479 | |||
480 | ; param |
||
481 | ; esi= input buffer |
||
482 | ; +0 connection |
||
483 | ; +4 rate |
||
484 | ; +8 mode |
||
485 | ; |
||
486 | ; retval |
||
487 | ; eax= error code |
||
488 | |||
489 | align 4 |
||
490 | uart_set_mode: |
||
491 | mov eax, [esi] |
||
492 | cmp [eax+APPOBJ.magic], 'CNCT' |
||
493 | jne .fail |
||
494 | |||
495 | cmp [eax+APPOBJ.destroy], uart_close.destroy |
||
496 | jne .fail |
||
497 | |||
498 | mov eax, [eax+CONNECTION.uart] |
||
499 | test eax, eax |
||
500 | jz .fail |
||
501 | |||
502 | mov ebx, [esi+4] |
||
503 | mov ecx, [esi+8] |
||
504 | |||
505 | ; param |
||
506 | ; eax= uart |
||
507 | ; ebx= baud rate |
||
508 | ; ecx= mode |
||
509 | |||
510 | align 4 |
||
511 | .internal: |
||
512 | cmp ebx, RATE_115200 |
||
513 | ja .fail |
||
514 | |||
515 | cmp ecx, LCR_BREAK |
||
516 | jae .fail |
||
517 | |||
518 | mov [eax+UART.rate], ebx |
||
519 | mov [eax+UART.mode], ecx |
||
520 | |||
521 | mov esi, eax |
||
522 | mov bx, [divisor+ebx*2] |
||
523 | |||
524 | mov edx, [esi+UART.base] |
||
525 | push edx |
||
526 | add edx, LCR_REG |
||
527 | in al, dx |
||
528 | or al, 0x80 |
||
529 | out dx, al |
||
530 | |||
531 | pop edx |
||
532 | mov al, bl |
||
533 | out dx, al |
||
534 | |||
535 | inc dx |
||
536 | mov al, bh |
||
537 | out dx, al |
||
538 | |||
539 | add edx, LCR_REG-1 |
||
540 | mov eax, ecx |
||
541 | out dx, al |
||
542 | xor eax, eax |
||
543 | ret |
||
544 | .fail: |
||
545 | or eax, -1 |
||
546 | ret |
||
547 | |||
548 | ; param |
||
549 | ; esi= input buffer |
||
550 | ; +0 connection |
||
551 | ; +4 modem control reg valie |
||
552 | ; |
||
553 | ; retval |
||
554 | ; eax= error code |
||
555 | |||
556 | align 4 |
||
557 | uart_set_mcr: |
||
558 | |||
559 | mov eax, [esi] |
||
560 | cmp [eax+APPOBJ.magic], 'CNCT' |
||
561 | jne .fail |
||
562 | |||
563 | cmp [eax+APPOBJ.destroy], uart_close.destroy |
||
564 | jne .fail |
||
565 | |||
566 | mov eax, [eax+CONNECTION.uart] |
||
567 | test eax, eax |
||
568 | jz .fail |
||
569 | |||
570 | mov ebx, [esi+4] |
||
571 | |||
572 | mov [eax+UART.mcr_reg], ebx |
||
573 | mov edx, [eax+UART.base] |
||
574 | add edx, MCR_REG |
||
575 | mov al, bl |
||
576 | out dx, al |
||
577 | xor eax, eax |
||
578 | ret |
||
579 | .fail: |
||
580 | or eax, -1 |
||
581 | ret |
||
582 | |||
583 | ; param |
||
584 | ; eax= port |
||
585 | ; |
||
586 | ; retval |
||
587 | ; ecx= connection |
||
588 | ; eax= error code |
||
589 | |||
590 | align 4 |
||
591 | uart_open: |
||
592 | dec eax |
||
593 | cmp eax, COM_MAX |
||
594 | jae .fail |
||
595 | |||
596 | mov esi, [com1+eax*4] ;uart |
||
597 | push esi |
||
598 | .do_wait: |
||
599 | cmp dword [esi+UART.lock], 0 |
||
600 | je .get_lock |
||
601 | ; call change_task |
||
602 | jmp .do_wait |
||
603 | .get_lock: |
||
604 | mov eax, 1 |
||
605 | xchg eax, [esi+UART.lock] |
||
606 | test eax, eax |
||
607 | jnz .do_wait |
||
608 | |||
609 | mov eax, esi ;uart |
||
610 | call uart_reset.internal |
||
611 | |||
612 | mov ebx, [CURRENT_TASK] |
||
613 | shl ebx, 5 |
||
614 | mov ebx, [CURRENT_TASK+ebx+4] |
||
615 | mov eax, CONNECTION_SIZE |
||
616 | call CreateObject |
||
617 | pop esi ;uart |
||
618 | test eax, eax |
||
619 | jz .fail |
||
620 | |||
621 | mov [eax+APPOBJ.magic], 'CNCT' |
||
622 | mov [eax+APPOBJ.destroy], uart_close.destroy |
||
623 | mov [eax+CONNECTION.uart], esi |
||
624 | mov ecx, eax |
||
625 | xor eax, eax |
||
626 | ret |
||
627 | .fail: |
||
628 | or eax, -1 |
||
629 | ret |
||
630 | restore .uart |
||
631 | |||
632 | ; param |
||
633 | ; esi= input buffer |
||
634 | |||
635 | align 4 |
||
636 | uart_close: |
||
637 | mov eax, [esi] |
||
638 | cmp [eax+APPOBJ.magic], 'CNCT' |
||
639 | jne .fail |
||
640 | |||
641 | cmp [eax+APPOBJ.destroy], uart_close.destroy |
||
642 | jne .fail |
||
643 | .destroy: |
||
644 | push [eax+CONNECTION.uart] |
||
645 | call DestroyObject ;eax= object |
||
646 | pop eax ;eax= uart |
||
647 | test eax, eax |
||
648 | jz .fail |
||
649 | |||
650 | mov [eax+UART.state], UART_CLOSED |
||
651 | mov [eax+UART.lock], 0;release port |
||
652 | xor eax, eax |
||
653 | ret |
||
654 | .fail: |
||
655 | or eax, -1 |
||
656 | ret |
||
657 | |||
658 | |||
659 | ; param |
||
660 | ; eax= uart |
||
661 | ; ebx= baud rate |
||
662 | |||
663 | align 4 |
||
664 | set_rate: |
||
665 | cmp ebx, RATE_115200 |
||
666 | ja .fail |
||
667 | |||
668 | mov [eax+UART.rate], ebx |
||
669 | mov bx, [divisor+ebx*2] |
||
670 | |||
671 | mov edx, [eax+UART.base] |
||
672 | add edx, LCR_REG |
||
673 | in al, dx |
||
674 | push eax |
||
675 | or al, 0x80 |
||
676 | out dx, al |
||
677 | |||
678 | sub edx, LCR_REG |
||
679 | mov al, bl |
||
680 | out dx, al |
||
681 | |||
682 | inc edx |
||
683 | mov al, bh |
||
684 | out dx, al |
||
685 | |||
686 | pop eax |
||
687 | add edx, LCR_REG-1 |
||
688 | out dx, al |
||
689 | .fail: |
||
690 | ret |
||
691 | |||
692 | |||
693 | ; param |
||
694 | ; ebx= uart |
||
695 | |||
696 | align 4 |
||
697 | transmit: |
||
698 | push esi |
||
699 | push edi |
||
700 | |||
701 | mov edx, [ebx+UART.base] |
||
702 | |||
703 | pushfd |
||
704 | cli |
||
705 | |||
706 | mov esi, [ebx+UART.xmit_rp] |
||
707 | mov ecx, [ebx+UART.xmit_count] |
||
708 | test ecx, ecx |
||
709 | je .stop |
||
710 | |||
711 | cmp ecx, 16 |
||
712 | jbe @F |
||
713 | mov ecx, 16 |
||
714 | @@: |
||
715 | sub [ebx+UART.xmit_count], ecx |
||
716 | add [ebx+UART.xmit_free], ecx |
||
717 | cld |
||
718 | @@: |
||
719 | lodsb |
||
720 | out dx, al |
||
721 | dec ecx |
||
722 | jnz @B |
||
723 | |||
724 | cmp esi, [ebx+UART.xmit_top] |
||
725 | jb @F |
||
726 | sub esi, 8192 |
||
727 | @@: |
||
728 | mov [ebx+UART.xmit_rp], esi |
||
729 | |||
730 | cmp [ebx+UART.xmit_count], 0 |
||
731 | je .stop |
||
732 | |||
733 | mov [ebx+UART.state], UART_TRANSMIT |
||
734 | jmp @F |
||
735 | .stop: |
||
736 | mov [ebx+UART.state], UART_STOP |
||
737 | @@: |
||
738 | popfd |
||
739 | pop edi |
||
740 | pop esi |
||
741 | ret |
||
742 | |||
743 | |||
744 | ; param |
||
745 | ; esi= input buffer |
||
746 | ; +0 connection |
||
747 | ; +4 dst buffer |
||
748 | ; +8 dst size |
||
749 | ; edi= output buffer |
||
750 | ; +0 bytes read |
||
751 | |||
752 | ; retval |
||
753 | ; eax= error code |
||
754 | |||
755 | align 4 |
||
756 | uart_read: |
||
757 | mov eax, [esi] |
||
758 | cmp [eax+APPOBJ.magic], 'CNCT' |
||
759 | jne .fail |
||
760 | |||
761 | cmp [eax+APPOBJ.destroy], uart_close.destroy |
||
762 | jne .fail |
||
763 | |||
764 | mov eax, [eax+CONNECTION.uart] |
||
765 | test eax, eax |
||
766 | jz .fail |
||
767 | |||
768 | mov ebx, [esi+8] ;dst size |
||
769 | mov ecx, [eax+UART.rcvr_count] |
||
770 | cmp ecx, ebx |
||
771 | jbe @F |
||
772 | mov ecx, ebx |
||
773 | @@: |
||
774 | mov [edi], ecx ;bytes read |
||
775 | test ecx, ecx |
||
776 | jz .done |
||
777 | |||
778 | push ecx |
||
779 | |||
780 | mov edi, [esi+4] ;dst |
||
781 | mov esi, [eax+UART.rcvr_rp] |
||
782 | cld |
||
783 | rep movsb |
||
784 | pop ecx |
||
785 | |||
786 | cmp esi, [eax+UART.rcvr_top] |
||
787 | jb @F |
||
788 | sub esi, 8192 |
||
789 | @@: |
||
790 | mov [eax+UART.rcvr_rp], esi |
||
791 | sub [eax+UART.rcvr_count], ecx |
||
792 | .done: |
||
793 | xor eax, eax |
||
794 | ret |
||
795 | .fail: |
||
796 | or eax, -1 |
||
797 | ret |
||
798 | |||
799 | ; param |
||
800 | ; esi= input buffer |
||
801 | ; +0 connection |
||
802 | ; +4 src buffer |
||
803 | ; +8 src size |
||
804 | ; |
||
805 | ; retval |
||
806 | ; eax= error code |
||
807 | |||
808 | align 4 |
||
809 | uart_write: |
||
810 | mov eax, [esi] |
||
811 | cmp [eax+APPOBJ.magic], 'CNCT' |
||
812 | jne .fail |
||
813 | |||
814 | cmp [eax+APPOBJ.destroy], uart_close.destroy |
||
815 | jne .fail |
||
816 | |||
817 | mov eax, [eax+CONNECTION.uart] |
||
818 | test eax, eax |
||
819 | jz .fail |
||
820 | |||
821 | mov ebx, [esi+4] |
||
822 | mov edx, [esi+8] |
||
823 | |||
824 | ; param |
||
825 | ; eax= uart |
||
826 | ; ebx= src |
||
827 | ; edx= count |
||
828 | |||
829 | align 4 |
||
830 | .internal: |
||
831 | mov esi, ebx |
||
832 | mov edi, [eax+UART.xmit_wp] |
||
833 | .write: |
||
834 | test edx, edx |
||
835 | jz .fail |
||
836 | .wait: |
||
837 | cmp [eax+UART.xmit_free], 0 |
||
838 | jne .fill |
||
839 | |||
840 | cmp [eax+UART.state], UART_TRANSMIT |
||
841 | je .wait |
||
842 | |||
843 | mov ebx, eax |
||
844 | push edx |
||
845 | call transmit |
||
846 | pop edx |
||
847 | mov eax, ebx |
||
848 | jmp .write |
||
849 | .fill: |
||
850 | mov ecx, [eax+UART.xmit_free] |
||
851 | cmp ecx, edx |
||
852 | jbe @F |
||
853 | mov ecx, edx |
||
854 | @@: |
||
855 | push ecx |
||
856 | cld |
||
857 | rep movsb |
||
858 | pop ecx |
||
859 | sub [eax+UART.xmit_free], ecx |
||
860 | add [eax+UART.xmit_count], ecx |
||
861 | sub edx, ecx |
||
862 | jnz .wait |
||
863 | .done: |
||
864 | cmp edi, [eax+UART.xmit_top] |
||
865 | jb @F |
||
866 | sub edi, 8192 |
||
867 | @@: |
||
868 | mov [eax+UART.xmit_wp], edi |
||
869 | cmp [eax+UART.state], UART_TRANSMIT |
||
870 | je @F |
||
871 | mov ebx, eax |
||
872 | call transmit |
||
873 | @@: |
||
874 | xor eax, eax |
||
875 | ret |
||
876 | .fail: |
||
877 | or eax, -1 |
||
878 | ret |
||
879 | |||
880 | |||
881 | align 4 |
||
882 | com_2_isr: |
||
883 | mov ebx, [com2] |
||
884 | jmp com_1_isr.get_info |
||
885 | align 4 |
||
886 | com_1_isr: |
||
887 | mov ebx, [com1] |
||
888 | .get_info: |
||
889 | mov edx, [ebx+UART.base] |
||
890 | add edx, IIR_REG |
||
891 | in al, dx |
||
892 | |||
893 | test al, IIR_INTR |
||
894 | jnz .done |
||
895 | |||
896 | shr eax, 1 |
||
897 | and eax, 3 |
||
898 | |||
899 | call [isr_action+eax*4] |
||
900 | jmp .get_info |
||
901 | .done: |
||
902 | ret |
||
903 | |||
904 | align 4 |
||
905 | isr_line: |
||
906 | mov edx, [ebx+UART.base] |
||
907 | add edx, LSR_REG |
||
908 | in al, dx |
||
909 | ret |
||
910 | |||
911 | align 4 |
||
912 | isr_recieve: |
||
913 | mov esi, [ebx+UART.base] |
||
914 | add esi, LSR_REG |
||
915 | mov edi, [ebx+UART.rcvr_wp] |
||
916 | xor ecx, ecx |
||
917 | cld |
||
918 | .read: |
||
919 | mov edx, esi |
||
920 | in al, dx |
||
921 | test eax, LSR_DR |
||
922 | jz .done |
||
923 | |||
924 | mov edx, [ebx+UART.base] |
||
925 | in al, dx |
||
926 | stosb |
||
927 | inc ecx |
||
928 | jmp .read |
||
929 | .done: |
||
930 | cmp edi, [ebx+UART.rcvr_top] |
||
931 | jb @F |
||
932 | sub edi, 8192 |
||
933 | @@: |
||
934 | mov [ebx+UART.rcvr_wp], edi |
||
935 | add [ebx+UART.rcvr_count], ecx |
||
936 | ret |
||
937 | |||
938 | align 4 |
||
939 | isr_modem: |
||
940 | mov edx, [ebx+UART.base] |
||
941 | add edx, MSR_REG |
||
942 | in al, dx |
||
943 | ret |
||
944 | |||
945 | |||
946 | align 4 |
||
947 | divisor dw 2304, 1536, 1047, 857, 768, 384 |
||
948 | dw 192, 96, 64, 58, 48, 32 |
||
949 | dw 24, 16, 12, 6, 3, 2, 1 |
||
950 | |||
951 | align 4 |
||
952 | uart_func dd 0 ;SRV_GETVERSION |
||
953 | dd 0 ;PORT_OPEN |
||
954 | dd uart_close ;PORT_CLOSE |
||
955 | dd uart_reset ;PORT_RESET |
||
956 | dd uart_set_mode ;PORT_SETMODE |
||
957 | dd 0 ;PORT_GETMODE |
||
958 | dd uart_set_mcr ;PORT_SETMODEM |
||
959 | dd 0 ;PORT_GETMODEM |
||
960 | dd uart_read ;PORT_READ |
||
961 | dd uart_write ;PORT_WRITE |
||
962 | |||
963 | isr_action dd isr_modem |
||
964 | dd transmit |
||
965 | dd isr_recieve |
||
966 | dd isr_line |
||
967 | |||
968 | version dd (5 shl 16) or (UART_VERSION and 0xFFFF) |
||
969 | |||
970 | sz_uart_srv db 'UART',0 |
||
971 | |||
972 | align 4 |
||
973 | |||
974 | com1 rd 1 |
||
975 | com2 rd 1 |
||
976 |