1 | /* |
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2 | * This file contains the IDT 4650 console IO package. |
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3 | * |
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4 | * Author: Craig Lebakken <craigl@transition.com> |
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5 | * |
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6 | * COPYRIGHT (c) 1996 by Transition Networks Inc. |
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7 | * |
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8 | * To anyone who acknowledges that this file is provided "AS IS" |
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9 | * without any express or implied warranty: |
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10 | * permission to use, copy, modify, and distribute this file |
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11 | * for any purpose is hereby granted without fee, provided that |
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12 | * the above copyright notice and this notice appears in all |
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13 | * copies, and that the name of Transition Networks not be used in |
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14 | * advertising or publicity pertaining to distribution of the |
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15 | * software without specific, written prior permission. |
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16 | * Transition Networks makes no representations about the suitability |
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17 | * of this software for any purpose. |
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18 | * |
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19 | * Derived from c/src/lib/libbsp/no_cpu/no_bsp/console/console.c: |
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20 | * |
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21 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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22 | * On-Line Applications Research Corporation (OAR). |
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23 | * All rights assigned to U.S. Government, 1994. |
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24 | * |
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25 | * This material may be reproduced by or for the U.S. Government pursuant |
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26 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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27 | * notice must appear in all copies of this file and its derivatives. |
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28 | * |
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29 | * $Id$ |
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30 | */ |
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31 | |
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32 | |
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33 | #ifndef lint |
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34 | static char _sccsid[] = "@(#)console.c 08/20/96 1.6\n"; |
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35 | #endif |
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36 | |
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37 | |
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38 | #include <bsp.h> |
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39 | #include <rtems/libio.h> |
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40 | #include <ctype.h> |
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41 | |
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42 | char idtsim_getchar( void ); |
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43 | void idtsim_putchar( char c ); |
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44 | void mips_leddisplay( char a, char b, char c, char d ); |
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45 | |
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46 | |
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47 | /* console_initialize |
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48 | * |
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49 | * This routine initializes the console IO driver. |
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50 | * |
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51 | * Input parameters: NONE |
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52 | * |
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53 | * Output parameters: NONE |
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54 | * |
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55 | * Return values: |
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56 | */ |
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57 | |
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58 | rtems_device_driver console_initialize( |
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59 | rtems_device_major_number major, |
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60 | rtems_device_minor_number minor, |
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61 | void *arg |
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62 | ) |
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63 | { |
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64 | rtems_status_code status; |
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65 | |
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66 | status = rtems_io_register_name( |
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67 | "/dev/console", |
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68 | major, |
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69 | (rtems_device_minor_number) 0 |
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70 | ); |
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71 | |
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72 | if (status != RTEMS_SUCCESSFUL) |
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73 | rtems_fatal_error_occurred(status); |
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74 | |
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75 | return RTEMS_SUCCESSFUL; |
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76 | } |
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77 | |
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78 | |
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79 | /* is_character_ready |
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80 | * |
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81 | * This routine returns TRUE if a character is available. |
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82 | * |
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83 | * Input parameters: NONE |
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84 | * |
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85 | * Output parameters: NONE |
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86 | * |
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87 | * Return values: |
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88 | */ |
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89 | |
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90 | rtems_boolean is_character_ready( |
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91 | char *ch |
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92 | ) |
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93 | { |
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94 | *ch = '\0'; /* return NULL for no particular reason */ |
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95 | return(TRUE); |
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96 | } |
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97 | |
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98 | /* inbyte |
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99 | * |
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100 | * This routine reads a character from the SOURCE. |
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101 | * |
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102 | * Input parameters: NONE |
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103 | * |
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104 | * Output parameters: NONE |
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105 | * |
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106 | * Return values: |
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107 | * character read from SOURCE |
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108 | */ |
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109 | |
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110 | char inbyte( void ) |
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111 | { |
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112 | /* |
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113 | * If polling, wait until a character is available. |
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114 | */ |
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115 | |
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116 | return idtsim_getchar(); |
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117 | } |
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118 | |
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119 | /* outbyte |
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120 | * |
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121 | * This routine transmits a character out the SOURCE. It may support |
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122 | * XON/XOFF flow control. |
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123 | * |
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124 | * Input parameters: |
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125 | * ch - character to be transmitted |
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126 | * |
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127 | * Output parameters: NONE |
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128 | */ |
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129 | |
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130 | void outbyte( |
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131 | char ch |
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132 | ) |
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133 | { |
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134 | #define NUM_LEDS 4 |
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135 | static unsigned int cur_led = 0; |
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136 | static unsigned char led_chars[NUM_LEDS]; |
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137 | |
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138 | /* |
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139 | * If polling, wait for the transmitter to be ready. |
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140 | * Check for flow control requests and process. |
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141 | * Then output the character. |
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142 | */ |
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143 | |
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144 | idtsim_putchar( ch ); |
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145 | |
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146 | /* print out first four alpha numeric characters in a line */ |
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147 | if ( ch == '\n' ) |
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148 | { |
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149 | mips_leddisplay( led_chars[0], led_chars[1], led_chars[2], led_chars[3] ); |
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150 | cur_led = 0; |
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151 | } |
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152 | else if ( isalnum( ch ) && cur_led < NUM_LEDS ) |
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153 | { |
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154 | led_chars[cur_led++] = ch; |
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155 | } |
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156 | |
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157 | } |
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158 | |
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159 | |
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160 | static int console_fd = -1; |
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161 | |
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162 | /* |
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163 | * Open entry point |
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164 | */ |
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165 | |
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166 | rtems_device_driver console_open( |
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167 | rtems_device_major_number major, |
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168 | rtems_device_minor_number minor, |
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169 | void * arg |
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170 | ) |
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171 | { |
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172 | #if 0 |
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173 | int console_fd = open("tty0", 2); /* open for read/write */ |
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174 | #endif |
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175 | return RTEMS_SUCCESSFUL; |
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176 | } |
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177 | |
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178 | /* |
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179 | * Close entry point |
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180 | */ |
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181 | |
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182 | rtems_device_driver console_close( |
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183 | rtems_device_major_number major, |
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184 | rtems_device_minor_number minor, |
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185 | void * arg |
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186 | ) |
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187 | { |
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188 | #if 0 |
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189 | if ( console_fd ) |
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190 | close( console_fd ); |
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191 | #endif |
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192 | return RTEMS_SUCCESSFUL; |
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193 | } |
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194 | |
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195 | /* |
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196 | * read bytes from the serial port. We only have stdin. |
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197 | */ |
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198 | |
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199 | rtems_device_driver console_read( |
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200 | rtems_device_major_number major, |
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201 | rtems_device_minor_number minor, |
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202 | void * arg |
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203 | ) |
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204 | { |
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205 | rtems_libio_rw_args_t *rw_args; |
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206 | char *buffer; |
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207 | int maximum; |
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208 | int count = 0; |
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209 | |
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210 | rw_args = (rtems_libio_rw_args_t *) arg; |
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211 | |
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212 | buffer = rw_args->buffer; |
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213 | maximum = rw_args->count; |
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214 | |
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215 | for (count = 0; count < maximum; count++) { |
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216 | buffer[ count ] = inbyte(); |
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217 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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218 | buffer[ count++ ] = '\n'; |
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219 | buffer[ count ] = 0; |
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220 | break; |
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221 | } |
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222 | } |
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223 | |
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224 | rw_args->bytes_moved = count; |
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225 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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226 | } |
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227 | |
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228 | /* |
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229 | * write bytes to the serial port. Stdout and stderr are the same. |
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230 | */ |
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231 | |
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232 | rtems_device_driver 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 | int count; |
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239 | int maximum; |
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240 | rtems_libio_rw_args_t *rw_args; |
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241 | char *buffer; |
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242 | |
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243 | rw_args = (rtems_libio_rw_args_t *) arg; |
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244 | |
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245 | buffer = rw_args->buffer; |
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246 | maximum = rw_args->count; |
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247 | |
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248 | for (count = 0; count < maximum; count++) { |
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249 | if ( buffer[ count ] == '\n') { |
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250 | outbyte('\r'); |
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251 | } |
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252 | outbyte( buffer[ count ] ); |
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253 | } |
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254 | |
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255 | rw_args->bytes_moved = maximum; |
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256 | return 0; |
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257 | } |
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258 | |
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259 | /* |
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260 | * IO Control entry point |
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261 | */ |
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262 | |
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263 | rtems_device_driver console_control( |
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264 | rtems_device_major_number major, |
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265 | rtems_device_minor_number minor, |
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266 | void * arg |
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267 | ) |
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268 | { |
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269 | return RTEMS_SUCCESSFUL; |
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270 | } |
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