1 | /** |
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2 | * @file console.c |
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3 | * |
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4 | * This file contains the GBA console I/O package. |
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5 | */ |
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6 | |
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7 | /* |
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8 | * RTEMS GBA BSP |
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9 | * |
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10 | * Copyright (c) 2004 Markku Puro <markku.puro@kopteri.net> |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #include <stdio.h> |
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18 | #include <stdlib.h> |
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19 | #include <unistd.h> |
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20 | |
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21 | #include <bsp.h> |
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22 | #include <rtems/bspIo.h> |
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23 | #include <rtems/libio.h> |
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24 | #include <rtems/termiostypes.h> |
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25 | #include <termios.h> |
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26 | #include <bsp/irq.h> |
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27 | #include <gba.h> |
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28 | #include <conio.h> |
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29 | |
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30 | /** |
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31 | * @brief gba_pollRead function read char |
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32 | * |
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33 | * @param minor unused |
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34 | * @return character code |
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35 | */ |
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36 | static int gba_pollRead(int minor) |
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37 | { |
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38 | return (gba_getch()); |
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39 | } |
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40 | |
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41 | /** |
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42 | * @brief gba_write function writes chars |
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43 | * |
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44 | * Input parameters: minor code, buffer pointer and lenght |
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45 | * @param minor unused |
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46 | * @param *buf buffer pointer |
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47 | * @param len lenght of buffer |
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48 | * @return character code |
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49 | * |
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50 | */ |
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51 | static ssize_t gba_write(int minor, const char *buf, size_t len) |
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52 | { |
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53 | int i; |
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54 | |
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55 | for (i=0;i<len;i++) { |
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56 | gba_putch((unsigned short)buf[i]); |
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57 | } |
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58 | return len; |
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59 | } |
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60 | |
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61 | /** |
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62 | * @brief gba_setAttributes function is empty |
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63 | * |
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64 | * @param minor unused |
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65 | * @param *t unused |
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66 | * @return constant 0 |
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67 | */ |
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68 | static int gba_setAttributes(int minor, const struct termios *t) |
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69 | { |
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70 | return 0; |
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71 | } |
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72 | |
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73 | /** BSP_output_char for printk support */ |
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74 | BSP_output_char_function_type BSP_output_char = (BSP_output_char_function_type) gba_putch; |
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75 | /** BSP_poll_char for printk support */ |
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76 | BSP_polling_getchar_function_type BSP_poll_char = gba_getch; |
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77 | |
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78 | /** |
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79 | * @brief Console device driver INITIALIZE entry point |
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80 | * |
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81 | * Initilizes the I/O console driver. |
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82 | * |
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83 | * @param major diver major number |
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84 | * @param minor driver minor mumber |
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85 | * @param *arg pointer to parameters |
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86 | * @return status code |
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87 | */ |
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88 | rtems_device_driver |
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89 | console_initialize( |
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90 | rtems_device_major_number major, |
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91 | rtems_device_minor_number minor, |
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92 | void *arg |
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93 | ) |
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94 | { |
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95 | rtems_status_code status; |
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96 | |
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97 | /* Set up TERMIOS */ |
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98 | rtems_termios_initialize (); |
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99 | |
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100 | /* Do device-specific initialization */ |
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101 | /* Already done in bspstart.c -> gba_textmode(CO60); */ |
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102 | |
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103 | /* Register the device */ |
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104 | status = rtems_io_register_name ("/dev/console", major, 0); |
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105 | if (status != RTEMS_SUCCESSFUL) { |
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106 | printk("Error registering console device!\n"); |
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107 | rtems_fatal_error_occurred (status); |
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108 | } |
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109 | |
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110 | printk("Initialized GBA console\n\n"); |
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111 | |
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112 | return RTEMS_SUCCESSFUL; |
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113 | } |
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114 | |
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115 | /** |
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116 | * @brief console_first_open function is empty |
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117 | * |
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118 | * @param major diver major number |
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119 | * @param minor driver minor mumber |
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120 | * @param *arg pointer to parameters |
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121 | * @return status code |
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122 | */ |
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123 | static int console_first_open(int major, int minor, void *arg) |
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124 | { |
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125 | return 0; |
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126 | } |
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127 | |
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128 | /** |
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129 | * @brief console_last_close function is empty |
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130 | * |
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131 | * @param major diver major number |
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132 | * @param minor driver minor mumber |
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133 | * @param *arg pointer to parameters |
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134 | * @return status code |
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135 | */ |
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136 | static int console_last_close(int major, int minor, void *arg) |
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137 | { |
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138 | return 0; |
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139 | } |
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140 | |
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141 | /** |
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142 | * @brief Console device driver OPEN entry point |
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143 | * |
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144 | * @param major diver major number |
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145 | * @param minor driver minor mumber |
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146 | * @param *arg pointer to parameters |
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147 | * @return status code |
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148 | */ |
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149 | rtems_device_driver |
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150 | console_open( |
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151 | rtems_device_major_number major, |
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152 | rtems_device_minor_number minor, |
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153 | void *arg |
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154 | ) |
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155 | { |
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156 | rtems_status_code status; |
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157 | static rtems_termios_callbacks cb = |
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158 | { |
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159 | console_first_open, /* firstOpen */ |
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160 | console_last_close, /* lastClose */ |
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161 | gba_pollRead, /* pollRead */ |
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162 | gba_write, /* write */ |
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163 | gba_setAttributes, /* setAttributes */ |
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164 | NULL, /* stopRemoteTx */ |
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165 | NULL, /* startRemoteTx */ |
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166 | TERMIOS_POLLED /* 1 = outputUsesInterrupts */ |
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167 | }; |
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168 | |
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169 | status = rtems_termios_open (major, minor, arg, &cb); |
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170 | |
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171 | if (status != RTEMS_SUCCESSFUL) { |
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172 | printk("Error openning console device\n"); |
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173 | return status; |
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174 | } |
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175 | |
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176 | return RTEMS_SUCCESSFUL; |
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177 | } |
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178 | |
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179 | /** |
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180 | * @brief Console device driver CLOSE entry point |
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181 | * |
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182 | * @param major diver major number |
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183 | * @param minor driver minor mumber |
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184 | * @param *arg pointer to parameters |
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185 | * @return status code |
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186 | */ |
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187 | rtems_device_driver |
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188 | console_close( |
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189 | rtems_device_major_number major, |
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190 | rtems_device_minor_number minor, |
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191 | void *arg |
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192 | ) |
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193 | { |
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194 | rtems_device_driver res = RTEMS_SUCCESSFUL; |
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195 | |
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196 | res = rtems_termios_close (arg); |
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197 | |
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198 | return res; |
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199 | } |
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200 | |
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201 | /** |
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202 | * @brief Console device driver READ entry point. |
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203 | * |
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204 | * Read characters from the I/O console. |
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205 | * |
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206 | * @param major diver major number |
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207 | * @param minor driver minor mumber |
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208 | * @param *arg pointer to parameters |
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209 | * @return status code |
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210 | */ |
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211 | rtems_device_driver |
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212 | console_read( |
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213 | rtems_device_major_number major, |
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214 | rtems_device_minor_number minor, |
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215 | void *arg |
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216 | ) |
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217 | { |
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218 | return rtems_termios_read (arg); |
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219 | } |
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220 | |
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221 | /** |
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222 | * @brief Console device driver WRITE entry point. |
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223 | * |
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224 | * Write characters to the I/O console. |
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225 | * |
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226 | * @param major diver major number |
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227 | * @param minor driver minor mumber |
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228 | * @param *arg pointer to parameters |
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229 | * @return status code |
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230 | */ |
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231 | rtems_device_driver |
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232 | console_write( |
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233 | rtems_device_major_number major, |
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234 | rtems_device_minor_number minor, |
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235 | void *arg |
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236 | ) |
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237 | { |
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238 | return rtems_termios_write (arg); |
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239 | } |
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240 | |
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241 | /** |
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242 | * @brief Handle ioctl request. |
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243 | * |
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244 | * @param major diver major number |
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245 | * @param minor driver minor mumber |
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246 | * @param *arg pointer to parameters |
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247 | * @return status code |
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248 | */ |
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249 | rtems_device_driver |
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250 | console_control( |
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251 | rtems_device_major_number major, |
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252 | rtems_device_minor_number minor, |
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253 | void *arg |
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254 | ) |
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255 | { |
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256 | return rtems_termios_ioctl (arg); |
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257 | } |
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