1 | /* |
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2 | * This file contains the template for a console IO package. |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1997. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may in |
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8 | * the file LICENSE in this distribution or at |
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9 | * http://www.OARcorp.com/rtems/license.html. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #define NO_BSP_INIT |
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15 | |
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16 | |
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17 | /* only one of the following can be defined */ |
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18 | #define SERIAL_INPUT /* use serial input */ |
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19 | |
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20 | #include <bsp.h> |
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21 | #include <rtems/libio.h> |
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22 | #include "concntl.h" |
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23 | /* #include "pcimsgreg.h" XXX JRS */ |
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24 | |
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25 | #ifndef lint |
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26 | static char _sccsid[] = "@(#)console.c 09/12/96 1.13\n"; |
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27 | #endif |
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28 | |
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29 | /* console_initialize |
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30 | * |
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31 | * This routine initializes the console IO driver. |
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32 | * |
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33 | * Input parameters: NONE |
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34 | * |
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35 | * Output parameters: NONE |
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36 | * |
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37 | * Return values: |
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38 | */ |
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39 | |
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40 | rtems_device_driver console_initialize( |
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41 | rtems_device_major_number major, |
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42 | rtems_device_minor_number minor, |
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43 | void *arg |
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44 | ) |
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45 | { |
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46 | rtems_status_code status; |
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47 | |
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48 | if ( console_pmr_init(*(unsigned32*)arg) ) |
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49 | return RTEMS_INVALID_NUMBER; |
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50 | |
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51 | |
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52 | status = rtems_io_register_name( |
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53 | "/dev/console", |
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54 | major, |
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55 | (rtems_device_minor_number) 0 |
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56 | ); |
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57 | |
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58 | if (status != RTEMS_SUCCESSFUL) |
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59 | rtems_fatal_error_occurred(status); |
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60 | |
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61 | return RTEMS_SUCCESSFUL; |
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62 | } |
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63 | |
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64 | |
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65 | /* is_character_ready |
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66 | * |
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67 | * This routine returns TRUE if a character is available. |
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68 | * |
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69 | * Input parameters: NONE |
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70 | * |
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71 | * Output parameters: NONE |
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72 | * |
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73 | * Return values: |
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74 | */ |
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75 | |
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76 | rtems_boolean is_character_ready( |
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77 | char *ch |
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78 | ) |
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79 | { |
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80 | *ch = '\0'; /* return NULL for no particular reason */ |
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81 | return(console_pmr_kbhit()); |
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82 | } |
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83 | |
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84 | /* inbyte |
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85 | * |
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86 | * This routine reads a character from the SOURCE. |
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87 | * |
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88 | * Input parameters: NONE |
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89 | * |
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90 | * Output parameters: NONE |
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91 | * |
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92 | * Return values: |
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93 | * character read from SOURCE |
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94 | */ |
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95 | |
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96 | char inbyte( unsigned int minor ) |
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97 | { |
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98 | /* |
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99 | * If polling, wait until a character is available. |
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100 | */ |
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101 | return console_pmr_getc(); |
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102 | } |
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103 | |
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104 | /* outbyte |
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105 | * |
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106 | * This routine transmits a character out the SOURCE. It may support |
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107 | * XON/XOFF flow control. |
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108 | * |
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109 | * Input parameters: |
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110 | * ch - character to be transmitted |
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111 | * |
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112 | * Output parameters: NONE |
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113 | */ |
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114 | |
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115 | void outbyte( unsigned int minor, |
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116 | char ch |
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117 | ) |
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118 | { |
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119 | console_pmr_putc( ch ); |
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120 | |
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121 | /* |
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122 | * Carriage Return/New line translation. |
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123 | */ |
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124 | |
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125 | if ( ch == '\n' ) |
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126 | outbyte( minor, '\r' ); |
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127 | } |
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128 | |
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129 | |
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130 | /* |
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131 | * Open entry point |
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132 | */ |
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133 | |
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134 | rtems_device_driver console_open( |
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135 | rtems_device_major_number major, |
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136 | rtems_device_minor_number minor, |
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137 | void * arg |
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138 | ) |
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139 | { |
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140 | return RTEMS_SUCCESSFUL; |
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141 | } |
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142 | |
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143 | /* |
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144 | * Close entry point |
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145 | */ |
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146 | |
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147 | rtems_device_driver console_close( |
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148 | rtems_device_major_number major, |
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149 | rtems_device_minor_number minor, |
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150 | void * arg |
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151 | ) |
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152 | { |
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153 | return RTEMS_SUCCESSFUL; |
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154 | } |
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155 | |
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156 | /* |
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157 | * read bytes from the serial port. We only have stdin. |
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158 | */ |
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159 | |
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160 | rtems_device_driver console_read( |
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161 | rtems_device_major_number major, |
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162 | rtems_device_minor_number minor, |
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163 | void * arg |
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164 | ) |
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165 | { |
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166 | rtems_libio_rw_args_t *rw_args; |
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167 | unsigned8 *buffer; |
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168 | unsigned32 maximum; |
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169 | unsigned32 count = 0; |
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170 | |
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171 | rw_args = (rtems_libio_rw_args_t *) arg; |
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172 | |
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173 | buffer = rw_args->buffer; |
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174 | maximum = rw_args->count; |
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175 | |
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176 | for (count = 0; count < maximum; count++) { |
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177 | buffer[ count ] = inbyte(minor); |
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178 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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179 | buffer[ count++ ] = '\n'; |
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180 | buffer[ count ] = 0; |
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181 | outbyte( minor, '\n' ); /* newline */ |
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182 | break; |
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183 | } |
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184 | else if (buffer[ count ] == '\b' && count > 0 ) |
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185 | { |
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186 | outbyte( minor, '\b' ); /* move back one space */ |
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187 | outbyte( minor, ' ' ); /* erase the character */ |
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188 | outbyte( minor, '\b' ); /* move back one space */ |
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189 | count-=2; |
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190 | } |
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191 | else |
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192 | outbyte( minor, buffer[ count ] ); /* echo the character */ |
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193 | } |
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194 | |
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195 | rw_args->bytes_moved = count; |
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196 | return (count > 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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197 | } |
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198 | |
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199 | /* |
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200 | * write bytes to the serial port. Stdout and stderr are the same. |
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201 | */ |
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202 | |
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203 | rtems_device_driver console_write( |
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204 | rtems_device_major_number major, |
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205 | rtems_device_minor_number minor, |
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206 | void * arg |
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207 | ) |
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208 | { |
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209 | int count; |
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210 | int maximum; |
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211 | rtems_libio_rw_args_t *rw_args; |
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212 | unsigned8 *buffer; |
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213 | |
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214 | rw_args = (rtems_libio_rw_args_t *) arg; |
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215 | |
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216 | buffer = rw_args->buffer; |
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217 | maximum = rw_args->count; |
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218 | |
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219 | for (count = 0; count < maximum; count++) { |
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220 | if ( buffer[ count ] == '\n') { |
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221 | outbyte(minor,'\r'); |
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222 | } |
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223 | outbyte( minor,buffer[ count ] ); |
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224 | } |
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225 | |
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226 | rw_args->bytes_moved = maximum; |
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227 | return 0; |
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228 | } |
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229 | |
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230 | /* |
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231 | * IO Control entry point |
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232 | */ |
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233 | |
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234 | rtems_device_driver console_control( |
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235 | rtems_device_major_number major, |
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236 | rtems_device_minor_number minor, |
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237 | void * arg |
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238 | ) |
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239 | { |
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240 | if (!arg) |
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241 | return RTEMS_INVALID_ADDRESS; |
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242 | |
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243 | switch( ((console_ioctl_request_t *)arg)->ioctl_type ) |
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244 | { |
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245 | case CON_KBHIT: |
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246 | /* check if keyboard was hit */ |
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247 | ((console_ioctl_request_t *)arg)->param = console_pmr_kbhit(); |
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248 | break; |
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249 | |
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250 | case CON_GET_RAW_BYTE: |
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251 | ((console_ioctl_request_t *)arg)->param = inbyte(minor); |
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252 | break; |
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253 | |
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254 | case CON_SEND_RAW_BYTE: |
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255 | outbyte(minor, ((console_ioctl_request_t *)arg)->param); |
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256 | break; |
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257 | |
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258 | default: |
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259 | break; |
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260 | } |
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261 | |
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262 | return RTEMS_SUCCESSFUL; |
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263 | } |
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