1 | /* |
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2 | * This file contains the TTY driver for the serial ports on the SCORE603e. |
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3 | * |
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4 | * This driver uses the termios pseudo driver. |
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5 | * |
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6 | * Currently only polled mode is supported. |
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7 | * |
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8 | * COPYRIGHT (c) 1989-1997. |
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9 | * On-Line Applications Research Corporation (OAR). |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.rtems.com/license/LICENSE. |
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14 | * |
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15 | * $Id$ |
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16 | */ |
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17 | |
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18 | #include <bsp.h> |
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19 | #include <rtems/libio.h> |
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20 | #include <stdlib.h> |
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21 | #include <assert.h> |
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22 | |
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23 | #include "consolebsp.h" |
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24 | #include <rtems/bspIo.h> |
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25 | |
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26 | #if (1) |
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27 | /* |
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28 | * The Port Used for the Console interface is based upon which |
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29 | * debugger is being used. The SDS debugger uses a binary |
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30 | * interface on port 0 as part of the debugger. Thus port 0 can |
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31 | * not be used as the console port for the SDS debugger. |
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32 | */ |
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33 | |
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34 | #if (SCORE603E_USE_SDS) |
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35 | #define USE_FOR_CONSOLE_DEF 1 |
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36 | |
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37 | #elif (SCORE603E_USE_OPEN_FIRMWARE) |
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38 | #define USE_FOR_CONSOLE_DEF 0 |
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39 | |
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40 | #elif (SCORE603E_USE_NONE) |
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41 | #define USE_FOR_CONSOLE_DEF 0 |
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42 | |
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43 | #elif (SCORE603E_USE_DINK) |
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44 | #define USE_FOR_CONSOLE_DEF 0 |
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45 | |
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46 | #else |
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47 | #error "SCORE603E CONSOLE.C -- what ROM monitor are you using" |
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48 | #endif |
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49 | |
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50 | #endif |
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51 | |
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52 | #if (0) |
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53 | extern int USE_FOR_CONSOLE; |
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54 | #endif |
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55 | |
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56 | int USE_FOR_CONSOLE = USE_FOR_CONSOLE_DEF; |
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57 | |
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58 | /* |
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59 | * |
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60 | * Console Device Driver Entry Points |
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61 | */ |
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62 | |
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63 | /* PAGE |
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64 | * |
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65 | * DEBUG_puts |
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66 | * |
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67 | * This should be safe in the event of an error. It attempts to insure |
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68 | * that no TX empty interrupts occur while it is doing polled IO. Then |
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69 | * it restores the state of that external interrupt. |
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70 | * |
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71 | * Input parameters: |
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72 | * string - pointer to debug output string |
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73 | * |
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74 | * Output parameters: NONE |
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75 | * |
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76 | * Return values: NONE |
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77 | */ |
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78 | |
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79 | void DEBUG_puts( |
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80 | char *string |
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81 | ) |
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82 | { |
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83 | char *s; |
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84 | int console; |
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85 | volatile uint8_t *csr; |
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86 | |
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87 | console = USE_FOR_CONSOLE; |
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88 | |
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89 | csr = Ports_85C30[ console ].ctrl; |
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90 | |
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91 | /* should disable interrupts here */ |
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92 | |
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93 | for ( s = string ; *s ; s++ ) |
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94 | outbyte_polled_85c30( csr, *s ); |
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95 | |
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96 | outbyte_polled_85c30( csr, '\r' ); |
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97 | outbyte_polled_85c30( csr, '\n' ); |
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98 | |
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99 | /* should enable interrupts here */ |
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100 | } |
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101 | |
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102 | /* PAGE |
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103 | * |
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104 | * console_inbyte_nonblocking |
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105 | * |
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106 | * Console Termios polling input entry point. |
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107 | */ |
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108 | |
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109 | int console_inbyte_nonblocking( |
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110 | int minor |
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111 | ) |
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112 | { |
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113 | int port = minor; |
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114 | |
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115 | /* |
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116 | * verify port Number |
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117 | */ |
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118 | assert ( port < NUM_Z85C30_PORTS ); |
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119 | |
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120 | /* |
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121 | * return a character from the 85c30 port. |
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122 | */ |
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123 | return inbyte_nonblocking_85c30( &Ports_85C30[ port ] ); |
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124 | } |
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125 | |
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126 | rtems_device_driver console_close( |
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127 | rtems_device_major_number major, |
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128 | rtems_device_minor_number minor, |
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129 | void * arg |
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130 | ) |
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131 | { |
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132 | return rtems_termios_close (arg); |
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133 | } |
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134 | |
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135 | rtems_device_driver console_read( |
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136 | rtems_device_major_number major, |
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137 | rtems_device_minor_number minor, |
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138 | void * arg |
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139 | ) |
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140 | { |
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141 | return rtems_termios_read (arg); |
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142 | } |
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143 | |
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144 | rtems_device_driver console_write( |
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145 | rtems_device_major_number major, |
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146 | rtems_device_minor_number minor, |
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147 | void * arg |
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148 | ) |
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149 | { |
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150 | return rtems_termios_write (arg); |
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151 | } |
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152 | |
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153 | rtems_device_driver console_control( |
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154 | rtems_device_major_number major, |
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155 | rtems_device_minor_number minor, |
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156 | void * arg |
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157 | ) |
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158 | { |
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159 | return rtems_termios_ioctl (arg); |
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160 | } |
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161 | |
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162 | /* |
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163 | * Interrupt driven console IO |
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164 | */ |
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165 | |
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166 | #if CONSOLE_USE_INTERRUPTS |
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167 | |
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168 | rtems_isr console_isr( |
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169 | rtems_vector_number vector |
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170 | ) |
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171 | { |
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172 | int i; |
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173 | |
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174 | for (i=0; i < NUM_Z85C30_PORTS; i++){ |
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175 | ISR_85c30_Async( &Ports_85C30[i] ); |
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176 | |
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177 | #if (0) /* XXX - TO TEST LOOP BACKS comment this out. */ |
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178 | if ( Ports_85C30[i].Chip->vector == vector ) { |
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179 | ISR_85c30_Async( &Ports_85C30[i] ); |
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180 | } |
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181 | #endif |
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182 | } |
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183 | } |
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184 | |
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185 | void console_exit() |
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186 | { |
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187 | int i; |
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188 | volatile Ring_buffer_t *buffer; |
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189 | uint32_t ch; |
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190 | |
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191 | for ( i=0 ; i < NUM_Z85C30_PORTS ; i++ ) { |
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192 | |
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193 | buffer = &( Ports_85C30[i].Protocol->TX_Buffer); |
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194 | |
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195 | while ( !Ring_buffer_Is_empty( buffer ) ) { |
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196 | Ring_buffer_Remove_character( buffer, ch ); |
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197 | outbyte_polled_85c30( Ports_85C30[i].ctrl, ch ); |
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198 | } |
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199 | } |
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200 | } |
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201 | |
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202 | void console_initialize_interrupts( void ) |
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203 | { |
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204 | volatile Ring_buffer_t *buffer; |
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205 | Console_Protocol *protocol; |
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206 | int i; |
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207 | |
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208 | for ( i=0 ; i < NUM_Z85C30_PORTS ; i++ ) { |
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209 | protocol = Ports_85C30[i].Protocol; |
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210 | |
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211 | /* |
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212 | * Initialize the ring buffer and set to not transmitting. |
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213 | */ |
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214 | buffer = &protocol->TX_Buffer; |
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215 | Ring_buffer_Initialize( buffer ); |
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216 | protocol->Is_TX_active = FALSE; |
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217 | } |
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218 | |
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219 | /* |
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220 | * Connect each vector to the interupt service routine. |
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221 | */ |
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222 | for (i=0; i < NUM_Z85C30_CHIPS; i++) |
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223 | set_vector( console_isr, Chips_85C30[i].vector, 1 ); |
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224 | |
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225 | atexit( console_exit ); |
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226 | |
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227 | } |
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228 | void console_outbyte_interrupts( |
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229 | const Port_85C30_info *Port, |
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230 | char ch |
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231 | ); |
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232 | |
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233 | /* XXXXXX */ |
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234 | #endif |
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235 | |
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236 | /* PAGE |
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237 | * |
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238 | * console_initialize |
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239 | * |
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240 | * Routine called to initialize the console device driver. |
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241 | */ |
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242 | rtems_device_driver console_initialize( |
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243 | rtems_device_major_number major, |
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244 | rtems_device_minor_number minor, |
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245 | void *arg |
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246 | ) |
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247 | { |
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248 | rtems_status_code status; |
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249 | rtems_device_minor_number console; |
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250 | int port, chip, p0,p1; |
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251 | |
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252 | /* |
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253 | * initialize the termio interface. |
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254 | */ |
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255 | rtems_termios_initialize(); |
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256 | |
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257 | /* |
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258 | * Register Device Names |
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259 | */ |
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260 | console = USE_FOR_CONSOLE; |
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261 | status = rtems_io_register_name( "/dev/console", major, console ); |
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262 | if (status != RTEMS_SUCCESSFUL) |
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263 | rtems_fatal_error_occurred(status); |
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264 | |
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265 | /* |
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266 | * Initialize Hardware |
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267 | */ |
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268 | |
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269 | /* |
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270 | * INITIALIZE_COM_PORTS is defined in the linker script. If it is |
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271 | * true all serial chips on the board are to be reset at startup |
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272 | * otherwise the reset is assumed to occur elsewhere (ie. in the |
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273 | * debugger...) |
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274 | */ |
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275 | #if ( INITIALIZE_COM_PORTS ) |
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276 | |
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277 | /* |
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278 | * Force to perform a hardware reset w/o |
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279 | * Master interrupt enable via register 9 |
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280 | */ |
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281 | |
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282 | for (port=0; port<NUM_Z85C30_PORTS; port++){ |
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283 | p0 = port; |
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284 | port++; |
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285 | p1 = port; |
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286 | Reset_85c30_chip( Ports_85C30[p0].ctrl, Ports_85C30[p1].ctrl ); |
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287 | } |
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288 | #else |
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289 | /* TEMP - To see if this makes a diff with the new ports. |
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290 | * Never reset chip 1 when using the chip as a monitor |
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291 | */ |
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292 | for (port=2; port<NUM_Z85C30_PORTS; port++){ |
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293 | p0 = port; |
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294 | port++; |
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295 | p1 = port; |
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296 | Reset_85c30_chip( Ports_85C30[p0].ctrl, Ports_85C30[p1].ctrl ); |
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297 | } |
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298 | #endif |
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299 | |
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300 | /* |
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301 | * Initialize each port. |
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302 | * Note: the ports are numbered such that 0,1 are on the first chip |
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303 | * 2,3 are on the second .... |
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304 | */ |
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305 | |
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306 | for (port=0; port<NUM_Z85C30_PORTS; port++) { |
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307 | chip = port >> 1; |
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308 | initialize_85c30_port( &Ports_85C30[port] ); |
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309 | } |
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310 | |
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311 | #if CONSOLE_USE_INTERRUPTS |
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312 | console_initialize_interrupts(); |
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313 | #endif |
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314 | |
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315 | return RTEMS_SUCCESSFUL; |
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316 | } |
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317 | |
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318 | /* PAGE |
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319 | * |
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320 | * console_write_support |
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321 | * |
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322 | * Console Termios output entry point. |
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323 | * |
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324 | */ |
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325 | int console_write_support( |
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326 | int minor, |
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327 | const char *buf, |
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328 | int len) |
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329 | { |
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330 | int nwrite = 0; |
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331 | volatile uint8_t *csr; |
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332 | int port = minor; |
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333 | |
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334 | /* |
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335 | * verify port Number |
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336 | */ |
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337 | assert ( port < NUM_Z85C30_PORTS ); |
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338 | |
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339 | /* |
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340 | * Set the csr based upon the port number. |
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341 | */ |
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342 | csr = Ports_85C30[ port ].ctrl; |
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343 | |
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344 | /* |
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345 | * poll each byte in the string out of the port. |
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346 | */ |
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347 | while (nwrite < len) { |
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348 | #if (CONSOLE_USE_INTERRUPTS) |
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349 | console_outbyte_interrupts( &Ports_85C30[ port ], *buf++ ); |
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350 | #else |
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351 | outbyte_polled_85c30( csr, *buf++ ); |
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352 | #endif |
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353 | nwrite++; |
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354 | } |
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355 | |
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356 | /* |
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357 | * return the number of bytes written. |
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358 | */ |
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359 | return nwrite; |
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360 | } |
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361 | |
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362 | /* PAGE |
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363 | * |
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364 | * console_open |
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365 | * |
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366 | * open a port as a termios console. |
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367 | * |
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368 | */ |
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369 | rtems_device_driver console_open( |
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370 | rtems_device_major_number major, |
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371 | rtems_device_minor_number minor, |
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372 | void * arg |
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373 | ) |
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374 | { |
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375 | rtems_status_code sc; |
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376 | int port = minor; |
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377 | #if (CONSOLE_USE_INTERRUPTS) |
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378 | rtems_libio_open_close_args_t *args = arg; |
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379 | static const rtems_termios_callbacks intrCallbacks = { |
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380 | NULL, /* firstOpen */ |
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381 | NULL, /* lastClose */ |
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382 | NULL, /* pollRead */ |
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383 | console_write_support, /* write */ |
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384 | NULL, /* setAttributes */ |
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385 | NULL, /* stopRemoteTx */ |
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386 | NULL, /* startRemoteTx */ |
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387 | 1 /* outputUsesInterrupts */ |
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388 | }; |
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389 | #else |
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390 | static const rtems_termios_callbacks pollCallbacks = { |
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391 | NULL, /* firstOpen */ |
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392 | NULL, /* lastClose */ |
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393 | console_inbyte_nonblocking, /* pollRead */ |
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394 | console_write_support, /* write */ |
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395 | NULL, /* setAttributes */ |
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396 | NULL, /* stopRemoteTx */ |
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397 | NULL, /* startRemoteTx */ |
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398 | 0 /* outputUsesInterrupts */ |
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399 | }; |
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400 | #endif |
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401 | |
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402 | /* |
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403 | * Verify the minor number is valid. |
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404 | */ |
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405 | if (minor < 0) |
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406 | return RTEMS_INVALID_NUMBER; |
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407 | |
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408 | if ( port > NUM_Z85C30_PORTS ) |
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409 | return RTEMS_INVALID_NUMBER; |
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410 | |
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411 | /* |
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412 | * open the port as a termios console driver. |
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413 | */ |
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414 | |
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415 | #if (CONSOLE_USE_INTERRUPTS) |
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416 | sc = rtems_termios_open( major, minor, arg, &intrCallbacks ); |
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417 | |
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418 | Ports_85C30[ minor ].Protocol->console_termios_data = args->iop->data1; |
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419 | #else |
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420 | sc = rtems_termios_open( major, minor, arg, &pollCallbacks ); |
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421 | #endif |
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422 | |
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423 | return sc; |
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424 | } |
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425 | |
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426 | #if (CONSOLE_USE_INTERRUPTS) |
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427 | |
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428 | /* |
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429 | * console_outbyte_interrupts |
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430 | * |
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431 | * This routine transmits a character out. |
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432 | * |
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433 | * Input parameters: |
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434 | * port - port to transmit character to |
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435 | * ch - character to be transmitted |
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436 | * |
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437 | * Output parameters: NONE |
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438 | * |
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439 | * Return values: NONE |
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440 | */ |
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441 | void console_outbyte_interrupts( |
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442 | const Port_85C30_info *Port, |
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443 | char ch |
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444 | ) |
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445 | { |
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446 | Console_Protocol *protocol; |
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447 | uint32_t isrlevel; |
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448 | |
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449 | protocol = Port->Protocol; |
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450 | |
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451 | /* |
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452 | * If this is the first character then we need to prime the pump |
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453 | */ |
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454 | |
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455 | if ( protocol->Is_TX_active == FALSE ) { |
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456 | |
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457 | rtems_interrupt_disable( isrlevel ); |
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458 | protocol->Is_TX_active = TRUE; |
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459 | outbyte_polled_85c30( Port->ctrl, ch ); |
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460 | rtems_interrupt_enable( isrlevel ); |
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461 | |
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462 | return; |
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463 | } |
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464 | |
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465 | while ( Ring_buffer_Is_full( &protocol->TX_Buffer ) ); |
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466 | |
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467 | Ring_buffer_Add_character( &protocol->TX_Buffer, ch ); |
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468 | } |
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469 | |
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470 | #endif |
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471 | |
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472 | /* const char arg to be compatible with BSP_output_char decl. */ |
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473 | void |
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474 | debug_putc_onlcr(const char c) |
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475 | { |
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476 | int console; |
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477 | volatile uint8_t *csr; |
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478 | uint32_t isrlevel; |
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479 | |
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480 | console = USE_FOR_CONSOLE; |
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481 | csr = Ports_85C30[ console ].ctrl; |
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482 | |
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483 | rtems_interrupt_disable( isrlevel ); |
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484 | outbyte_polled_85c30( csr, c ); |
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485 | rtems_interrupt_enable( isrlevel ); |
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486 | } |
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487 | |
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488 | BSP_output_char_function_type BSP_output_char = debug_putc_onlcr; |
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489 | /* const char arg to be compatible with BSP_output_char decl. */ |
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490 | |
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