1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup Console |
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5 | * |
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6 | * @brief pc397 console select |
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7 | * |
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8 | * This file contains a routine to select the console based upon a number |
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9 | * of criteria. |
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10 | */ |
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11 | |
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12 | /* |
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13 | * COPYRIGHT (c) 2011-2012, 2016. |
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14 | * On-Line Applications Research Corporation (OAR). |
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15 | * |
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16 | * The license and distribution terms for this file may be |
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17 | * found in the file LICENSE in this distribution or at |
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18 | * http://www.rtems.org/license/LICENSE. |
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19 | */ |
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20 | |
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21 | #include <bsp.h> |
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22 | #include <rtems/libio.h> |
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23 | #include <stdlib.h> |
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24 | #include <assert.h> |
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25 | #include <termios.h> |
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26 | |
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27 | #include <rtems/termiostypes.h> |
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28 | #include <libchip/serial.h> |
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29 | #include "../../../shared/console_private.h" |
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30 | #ifdef RTEMS_RUNTIME_CONSOLE_SELECT |
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31 | #include <crt.h> |
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32 | #endif |
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33 | |
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34 | /* |
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35 | * Method to return true if the device associated with the |
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36 | * minor number probs available. |
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37 | */ |
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38 | static bool bsp_Is_Available( rtems_device_minor_number minor ) |
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39 | { |
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40 | console_tbl *cptr = Console_Port_Tbl[minor]; |
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41 | |
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42 | /* |
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43 | * First perform the configuration dependent probe, then the |
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44 | * device dependent probe |
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45 | */ |
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46 | if ((!cptr->deviceProbe || cptr->deviceProbe(minor)) && |
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47 | cptr->pDeviceFns->deviceProbe(minor)) { |
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48 | return true; |
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49 | } |
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50 | return false; |
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51 | } |
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52 | |
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53 | /* |
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54 | * Method to return the first available device. |
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55 | */ |
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56 | static rtems_device_minor_number bsp_First_Available_Device( void ) |
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57 | { |
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58 | rtems_device_minor_number minor; |
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59 | |
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60 | for (minor=0; minor < Console_Port_Count ; minor++) { |
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61 | console_tbl *cptr = Console_Port_Tbl[minor]; |
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62 | |
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63 | /* |
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64 | * First perform the configuration dependent probe, then the |
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65 | * device dependent probe |
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66 | */ |
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67 | |
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68 | if ((!cptr->deviceProbe || cptr->deviceProbe(minor)) && |
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69 | cptr->pDeviceFns->deviceProbe(minor)) { |
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70 | return minor; |
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71 | } |
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72 | } |
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73 | |
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74 | /* |
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75 | * Error No devices were found. We will want to bail here. |
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76 | */ |
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77 | rtems_fatal_error_occurred(RTEMS_IO_ERROR); |
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78 | } |
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79 | |
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80 | static bool bsp_find_console_entry( |
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81 | const char *match, |
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82 | size_t length, |
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83 | rtems_device_minor_number *match_minor |
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84 | ) |
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85 | { |
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86 | rtems_device_minor_number minor; |
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87 | const char *name; |
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88 | |
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89 | for (minor=0; minor < Console_Port_Count ; minor++) { |
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90 | console_tbl *cptr = Console_Port_Tbl[minor]; |
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91 | |
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92 | /* |
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93 | * Console table entries include /dev/ prefix, device names passed |
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94 | * in on command line do not. |
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95 | */ |
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96 | name = cptr->sDeviceName + sizeof("/dev"); |
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97 | if ( !strncmp( name, match, length ) ) { |
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98 | *match_minor = minor; |
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99 | return true; |
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100 | } |
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101 | } |
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102 | |
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103 | return false; |
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104 | } |
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105 | |
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106 | static bool parse_printk_or_console( |
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107 | const char *param, |
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108 | rtems_device_minor_number *minor_out |
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109 | ) |
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110 | { |
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111 | static const char *opt; |
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112 | char working[64] = ""; |
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113 | char *p; |
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114 | |
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115 | /* |
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116 | * Check the command line for the type of mode the console is. |
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117 | */ |
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118 | opt = bsp_cmdline_arg(param); |
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119 | if ( !opt ) { |
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120 | return false; |
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121 | } |
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122 | |
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123 | /* |
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124 | * bsp_cmdline_arg() returns pointer to a string. It may not be the |
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125 | * last string on the command line. |
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126 | */ |
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127 | strncpy( working, opt, sizeof(working) ); |
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128 | p = strchr( working, ' ' ); |
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129 | if ( p ) { |
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130 | *p = '\0'; |
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131 | } |
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132 | |
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133 | const char *comma; |
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134 | size_t length = NAME_MAX; |
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135 | rtems_device_minor_number minor; |
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136 | char *option = working; |
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137 | |
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138 | /* |
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139 | * Only match up to a comma or NULL |
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140 | */ |
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141 | comma = strchr (option, ','); |
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142 | |
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143 | if ( comma ) { |
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144 | length = comma - option; |
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145 | } |
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146 | |
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147 | option += strnlen(param, 32); |
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148 | |
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149 | if ( !bsp_find_console_entry( option, length, &minor ) ) { |
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150 | return false; |
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151 | } |
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152 | |
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153 | *minor_out = minor; |
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154 | if (comma) { |
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155 | console_tbl *conscfg; |
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156 | |
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157 | comma += 1; |
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158 | conscfg = &Console_Configuration_Ports[minor]; |
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159 | if (strncmp (option, "115200", sizeof ("115200") - 1) == 0) |
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160 | conscfg->pDeviceParams = (void *)115200; |
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161 | else if (strncmp (option, "57600", sizeof ("57600") - 1) == 0) |
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162 | conscfg->pDeviceParams = (void *)57600; |
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163 | else if (strncmp (option, "38400", sizeof ("38400") - 1) == 0) |
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164 | conscfg->pDeviceParams = (void *)38400; |
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165 | else if (strncmp (option, "19200", sizeof ("19200") - 1) == 0) |
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166 | conscfg->pDeviceParams = (void *)19200; |
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167 | else if (strncmp (option, "9600", sizeof ("9600") - 1) == 0) |
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168 | conscfg->pDeviceParams = (void *)9600; |
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169 | else if (strncmp (option, "4800", sizeof ("4800") - 1) == 0) |
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170 | conscfg->pDeviceParams = (void *)4800; |
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171 | } |
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172 | |
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173 | return true; |
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174 | } |
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175 | |
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176 | /* |
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177 | * Helper to retrieve device name |
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178 | */ |
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179 | static inline const char *get_name( |
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180 | rtems_device_minor_number minor |
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181 | ) |
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182 | { |
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183 | return Console_Port_Tbl[minor]->sDeviceName; |
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184 | } |
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185 | |
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186 | /* |
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187 | * Parse the arguments early so the printk and console ports are |
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188 | * set appropriately. |
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189 | */ |
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190 | void pc386_parse_console_arguments(void) |
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191 | { |
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192 | rtems_device_minor_number minor; |
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193 | |
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194 | /* |
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195 | * The console device driver must have its data structures initialized |
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196 | * before we can iterate the table of devices for names. |
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197 | */ |
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198 | console_initialize_data(); |
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199 | |
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200 | /* |
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201 | * Assume that if only --console is specified, that printk() should |
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202 | * follow that selection by default. |
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203 | */ |
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204 | if ( parse_printk_or_console( "--console=", &minor ) ) { |
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205 | Console_Port_Minor = minor; |
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206 | BSPPrintkPort = minor; |
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207 | } |
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208 | |
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209 | /* |
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210 | * But if explicitly specified, attempt to honor it. |
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211 | */ |
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212 | if ( parse_printk_or_console( "--printk=", &minor ) ) { |
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213 | BSPPrintkPort = minor; |
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214 | } |
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215 | |
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216 | #if 0 |
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217 | printk( "Console device: %s\n", get_name(Console_Port_Minor) ); |
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218 | printk( "printk device: %s\n", get_name(BSPPrintkPort) ); |
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219 | #endif |
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220 | } |
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221 | |
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222 | /* |
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223 | * This handles the selection of the console after the devices are |
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224 | * initialized. |
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225 | */ |
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226 | void bsp_console_select(void) |
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227 | { |
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228 | #ifdef RTEMS_RUNTIME_CONSOLE_SELECT |
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229 | if ( BSP_runtime_console_select ) |
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230 | BSP_runtime_console_select(&BSPPrintkPort, &Console_Port_Minor); |
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231 | |
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232 | /* |
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233 | * If no video card, fall back to serial port console |
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234 | */ |
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235 | if((Console_Port_Minor == BSP_CONSOLE_VGA) |
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236 | && (*(unsigned char*) NB_MAX_ROW_ADDR == 0) |
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237 | && (*(unsigned short*)NB_MAX_COL_ADDR == 0)) { |
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238 | Console_Port_Minor = BSP_CONSOLE_COM2; |
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239 | BSPPrintkPort = BSP_CONSOLE_COM1; |
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240 | } |
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241 | #endif |
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242 | |
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243 | /* |
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244 | * If the device that was selected isn't available then |
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245 | * let the user know and select the first available device. |
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246 | */ |
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247 | if ( !bsp_Is_Available( Console_Port_Minor ) ) { |
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248 | printk( |
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249 | "Error finding %s setting console to first available\n", |
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250 | get_name(Console_Port_Minor) |
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251 | ); |
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252 | Console_Port_Minor = bsp_First_Available_Device(); |
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253 | } |
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254 | } |
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