1 | /* |
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2 | * This file contains the hardware independent portion of a polled |
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3 | * console device driver. If a BSP chooses to use this, then it |
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4 | * only has to provide a few board dependent routines. |
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5 | * |
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6 | * COPYRIGHT (c) 1989-1997. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.rtems.org/license/LICENSE. |
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12 | */ |
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13 | |
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14 | #include <bsp.h> |
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15 | #include <rtems/libio.h> |
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16 | #include <stdlib.h> |
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17 | #include <assert.h> |
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18 | |
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19 | /* external prototypes for monitor interface routines */ |
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20 | |
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21 | void console_outbyte_polled( |
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22 | int port, |
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23 | char ch |
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24 | ); |
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25 | |
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26 | int console_inbyte_nonblocking( |
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27 | int port |
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28 | ); |
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29 | |
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30 | void console_initialize_hardware(void); |
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31 | |
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32 | /* |
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33 | * Console Termios Support Entry Points |
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34 | * |
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35 | */ |
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36 | ssize_t console_write_support ( |
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37 | int minor, |
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38 | const char *bufarg, |
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39 | size_t len |
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40 | ) |
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41 | { |
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42 | int nwrite = 0; |
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43 | const char *buf = bufarg; |
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44 | |
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45 | while (nwrite < len) { |
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46 | console_outbyte_polled( minor, *buf++ ); |
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47 | nwrite++; |
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48 | } |
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49 | return nwrite; |
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50 | } |
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51 | |
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52 | /* |
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53 | * Console Device Driver Entry Points |
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54 | * |
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55 | */ |
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56 | |
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57 | rtems_device_driver console_initialize( |
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58 | rtems_device_major_number major, |
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59 | rtems_device_minor_number minor, |
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60 | void *arg |
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61 | ) |
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62 | { |
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63 | rtems_status_code status; |
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64 | |
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65 | /* |
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66 | * Ensure Termios is initialized |
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67 | */ |
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68 | rtems_termios_initialize(); |
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69 | |
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70 | /* |
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71 | * Make sure the hardware is initialized. |
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72 | */ |
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73 | console_initialize_hardware(); |
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74 | |
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75 | /* |
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76 | * Register Device Names |
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77 | */ |
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78 | status = rtems_io_register_name( "/dev/console", major, 0 ); |
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79 | if (status != RTEMS_SUCCESSFUL) |
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80 | rtems_fatal_error_occurred(status); |
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81 | |
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82 | return RTEMS_SUCCESSFUL; |
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83 | } |
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84 | |
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85 | rtems_device_driver console_open( |
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86 | rtems_device_major_number major, |
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87 | rtems_device_minor_number minor, |
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88 | void * arg |
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89 | ) |
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90 | { |
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91 | static const rtems_termios_callbacks pollCallbacks = { |
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92 | NULL, /* firstOpen */ |
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93 | NULL, /* lastClose */ |
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94 | console_inbyte_nonblocking, /* pollRead */ |
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95 | console_write_support, /* write */ |
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96 | NULL, /* setAttributes */ |
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97 | NULL, /* stopRemoteTx */ |
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98 | NULL, /* startRemoteTx */ |
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99 | 0 /* outputUsesInterrupts */ |
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100 | }; |
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101 | |
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102 | assert( minor <= 1 ); |
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103 | if ( minor > 1 ) |
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104 | return RTEMS_INVALID_NUMBER; |
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105 | |
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106 | rtems_termios_open( major, minor, arg, &pollCallbacks ); |
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107 | |
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108 | return RTEMS_SUCCESSFUL; |
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109 | } |
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110 | |
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111 | rtems_device_driver console_close( |
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112 | rtems_device_major_number major, |
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113 | rtems_device_minor_number minor, |
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114 | void * arg |
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115 | ) |
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116 | { |
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117 | return rtems_termios_close( arg ); |
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118 | } |
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119 | |
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120 | rtems_device_driver console_read( |
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121 | rtems_device_major_number major, |
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122 | rtems_device_minor_number minor, |
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123 | void * arg |
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124 | ) |
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125 | { |
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126 | return rtems_termios_read( arg ); |
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127 | } |
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128 | |
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129 | rtems_device_driver console_write( |
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130 | rtems_device_major_number major, |
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131 | rtems_device_minor_number minor, |
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132 | void * arg |
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133 | ) |
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134 | { |
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135 | return rtems_termios_write( arg ); |
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136 | } |
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137 | |
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138 | rtems_device_driver console_control( |
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139 | rtems_device_major_number major, |
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140 | rtems_device_minor_number minor, |
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141 | void * arg |
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142 | ) |
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143 | { |
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144 | return rtems_termios_ioctl( arg ); |
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145 | } |
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