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 Extension of the generic libchip console driver shell |
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7 | */ |
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8 | |
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9 | /* |
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10 | * COPYRIGHT (c) 1989-2011. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.org/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #include <bsp.h> |
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19 | #include <bsp/fatal.h> |
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20 | #include <rtems/libio.h> |
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21 | #include <rtems/console.h> |
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22 | #include <stdlib.h> |
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23 | #include <assert.h> |
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24 | #include <termios.h> |
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25 | |
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26 | #include <rtems/termiostypes.h> |
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27 | #include <libchip/serial.h> |
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28 | #include "console_private.h" |
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29 | |
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30 | unsigned long Console_Port_Count = 0; |
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31 | console_tbl **Console_Port_Tbl = NULL; |
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32 | console_data *Console_Port_Data = NULL; |
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33 | rtems_device_minor_number Console_Port_Minor = 0; |
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34 | static bool console_initialized = false; |
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35 | |
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36 | /* |
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37 | * console_initialize_pointers |
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38 | * |
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39 | * This method is used to initialize the table of pointers to the |
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40 | * serial port configuration structure entries. |
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41 | */ |
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42 | static void console_initialize_pointers(void) |
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43 | { |
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44 | int i; |
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45 | |
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46 | if ( Console_Port_Tbl ) |
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47 | return; |
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48 | |
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49 | Console_Port_Count = Console_Configuration_Count; |
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50 | Console_Port_Tbl = malloc( Console_Port_Count * sizeof( console_tbl * ) ); |
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51 | if (Console_Port_Tbl == NULL) |
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52 | bsp_fatal( BSP_FATAL_CONSOLE_NO_MEMORY_0 ); |
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53 | |
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54 | for (i=0 ; i < Console_Port_Count ; i++) |
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55 | Console_Port_Tbl[i] = &Console_Configuration_Ports[i]; |
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56 | } |
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57 | |
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58 | /* |
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59 | * console_register_devices |
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60 | * |
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61 | * This method is used to add dynamically discovered devices to the |
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62 | * set of serial ports supported. |
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63 | */ |
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64 | void console_register_devices( |
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65 | console_tbl *new_ports, |
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66 | size_t number_of_ports |
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67 | ) |
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68 | { |
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69 | int old_number_of_ports; |
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70 | int i; |
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71 | |
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72 | console_initialize_pointers(); |
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73 | |
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74 | /* |
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75 | * console_initialize has been invoked so it is now too late to |
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76 | * register devices. |
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77 | */ |
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78 | if ( console_initialized ) { |
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79 | bsp_fatal( BSP_FATAL_CONSOLE_MULTI_INIT ); |
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80 | } |
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81 | |
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82 | /* |
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83 | * Allocate memory for the console port extension |
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84 | */ |
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85 | old_number_of_ports = Console_Port_Count; |
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86 | Console_Port_Count += number_of_ports; |
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87 | Console_Port_Tbl = realloc( |
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88 | Console_Port_Tbl, |
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89 | Console_Port_Count * sizeof( console_tbl * ) |
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90 | ); |
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91 | if ( Console_Port_Tbl == NULL ) { |
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92 | bsp_fatal( BSP_FATAL_CONSOLE_NO_MEMORY_1 ); |
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93 | } |
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94 | |
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95 | Console_Port_Data = calloc( Console_Port_Count, sizeof( console_data ) ); |
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96 | if ( Console_Port_Data == NULL ) { |
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97 | bsp_fatal( BSP_FATAL_CONSOLE_NO_MEMORY_2 ); |
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98 | } |
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99 | |
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100 | /* |
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101 | * Now add the new devices at the end. |
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102 | */ |
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103 | |
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104 | for (i=0 ; i < number_of_ports ; i++) { |
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105 | Console_Port_Tbl[old_number_of_ports + i] = &new_ports[i]; |
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106 | } |
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107 | } |
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108 | |
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109 | /* |
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110 | * console_open |
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111 | * |
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112 | * open a port as a termios console. |
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113 | */ |
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114 | rtems_device_driver console_open( |
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115 | rtems_device_major_number major, |
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116 | rtems_device_minor_number minor, |
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117 | void * arg |
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118 | ) |
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119 | { |
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120 | rtems_status_code status; |
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121 | rtems_libio_open_close_args_t *args = arg; |
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122 | rtems_libio_ioctl_args_t IoctlArgs; |
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123 | struct termios Termios; |
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124 | rtems_termios_callbacks Callbacks; |
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125 | console_tbl *cptr; |
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126 | struct rtems_termios_tty *current_tty; |
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127 | |
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128 | /* |
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129 | * Verify the port number is valid. |
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130 | */ |
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131 | if ( minor > Console_Port_Count ) { |
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132 | return RTEMS_INVALID_NUMBER; |
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133 | } |
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134 | |
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135 | /* |
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136 | * Open the port as a termios console driver. |
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137 | */ |
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138 | |
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139 | cptr = Console_Port_Tbl[minor]; |
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140 | Callbacks.firstOpen = cptr->pDeviceFns->deviceFirstOpen; |
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141 | Callbacks.lastClose = cptr->pDeviceFns->deviceLastClose; |
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142 | Callbacks.pollRead = cptr->pDeviceFns->deviceRead; |
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143 | Callbacks.write = cptr->pDeviceFns->deviceWrite; |
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144 | Callbacks.setAttributes = cptr->pDeviceFns->deviceSetAttributes; |
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145 | if (cptr->pDeviceFlow != NULL) { |
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146 | Callbacks.stopRemoteTx = cptr->pDeviceFlow->deviceStopRemoteTx; |
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147 | Callbacks.startRemoteTx = cptr->pDeviceFlow->deviceStartRemoteTx; |
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148 | } else { |
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149 | Callbacks.stopRemoteTx = NULL; |
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150 | Callbacks.startRemoteTx = NULL; |
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151 | } |
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152 | Callbacks.outputUsesInterrupts = cptr->pDeviceFns->deviceOutputUsesInterrupts; |
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153 | |
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154 | /* XXX what about |
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155 | * Console_Port_Tbl[minor].ulMargin, |
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156 | * Console_Port_Tbl[minor].ulHysteresis); |
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157 | */ |
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158 | |
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159 | status = rtems_termios_open( major, minor, arg, &Callbacks ); |
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160 | Console_Port_Data[minor].termios_data = args->iop->data1; |
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161 | |
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162 | /* Get tty pointur from the Console_Port_Data */ |
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163 | current_tty = Console_Port_Data[minor].termios_data; |
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164 | |
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165 | if ( (current_tty->refcount == 1) ) { |
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166 | |
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167 | /* |
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168 | * If this BSP has a preferred default rate, then use that. |
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169 | */ |
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170 | #if defined(BSP_DEFAULT_BAUD_RATE) |
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171 | rtems_termios_set_initial_baud( current_tty, BSP_DEFAULT_BAUD_RATE ); |
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172 | #endif |
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173 | |
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174 | /* |
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175 | * If it's the first open, modified, if need, the port parameters |
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176 | */ |
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177 | if ( minor != Console_Port_Minor ) { |
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178 | /* |
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179 | * If this is not the console we do not want ECHO and so forth |
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180 | */ |
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181 | IoctlArgs.iop = args->iop; |
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182 | IoctlArgs.command = RTEMS_IO_GET_ATTRIBUTES; |
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183 | IoctlArgs.buffer = &Termios; |
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184 | rtems_termios_ioctl( &IoctlArgs ); |
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185 | |
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186 | Termios.c_lflag = ICANON; |
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187 | IoctlArgs.command = RTEMS_IO_SET_ATTRIBUTES; |
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188 | rtems_termios_ioctl( &IoctlArgs ); |
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189 | } |
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190 | } |
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191 | |
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192 | if ( (args->iop->flags&LIBIO_FLAGS_READ) && |
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193 | cptr->pDeviceFlow && |
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194 | cptr->pDeviceFlow->deviceStartRemoteTx) { |
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195 | cptr->pDeviceFlow->deviceStartRemoteTx(minor); |
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196 | } |
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197 | |
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198 | return status; |
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199 | } |
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200 | |
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201 | /* |
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202 | * console_close |
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203 | * |
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204 | * This routine closes a port that has been opened as console. |
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205 | */ |
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206 | rtems_device_driver console_close( |
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207 | rtems_device_major_number major, |
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208 | rtems_device_minor_number minor, |
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209 | void * arg |
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210 | ) |
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211 | { |
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212 | rtems_libio_open_close_args_t *args = arg; |
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213 | struct rtems_termios_tty *current_tty; |
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214 | console_tbl *cptr; |
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215 | |
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216 | cptr = Console_Port_Tbl[minor]; |
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217 | |
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218 | /* Get tty pointer from the Console_Port_Data */ |
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219 | current_tty = Console_Port_Data[minor].termios_data; |
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220 | |
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221 | /* Get the tty refcount to determine if we need to do deviceStopRemoteTx. |
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222 | * Stop only if it's the last one opened. |
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223 | */ |
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224 | if ( (current_tty->refcount == 1) ) { |
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225 | if ( (args->iop->flags&LIBIO_FLAGS_READ) && |
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226 | cptr->pDeviceFlow && |
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227 | cptr->pDeviceFlow->deviceStopRemoteTx) { |
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228 | cptr->pDeviceFlow->deviceStopRemoteTx(minor); |
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229 | } |
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230 | } |
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231 | |
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232 | return rtems_termios_close (arg); |
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233 | } |
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234 | |
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235 | /* |
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236 | * console_initialize |
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237 | * |
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238 | * Routine called to initialize the console device driver. |
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239 | */ |
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240 | rtems_device_driver console_initialize( |
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241 | rtems_device_major_number major, |
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242 | rtems_device_minor_number minor_arg, |
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243 | void *arg |
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244 | ) |
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245 | { |
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246 | rtems_status_code status; |
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247 | rtems_device_minor_number minor; |
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248 | console_tbl *port; |
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249 | |
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250 | /* |
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251 | * If we have no devices which were registered earlier then we |
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252 | * must still initialize pointers and set Console_Port_Data. |
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253 | */ |
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254 | if ( ! Console_Port_Tbl ) { |
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255 | console_initialize_pointers(); |
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256 | Console_Port_Data = calloc( Console_Port_Count, sizeof( console_data ) ); |
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257 | if ( Console_Port_Data == NULL ) { |
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258 | bsp_fatal( BSP_FATAL_CONSOLE_NO_MEMORY_3 ); |
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259 | } |
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260 | } |
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261 | |
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262 | /* |
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263 | * console_initialize has been invoked so it is now too late to |
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264 | * register devices. |
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265 | */ |
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266 | console_initialized = true; |
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267 | |
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268 | /* |
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269 | * Initialize the termio interface, our table of pointers to device |
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270 | * information structures, and determine if the user has explicitly |
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271 | * specified which device is to be used for the console. |
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272 | */ |
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273 | rtems_termios_initialize(); |
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274 | bsp_console_select(); |
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275 | |
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276 | /* |
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277 | * Iterate over all of the console devices we know about |
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278 | * and initialize them. |
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279 | */ |
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280 | for (minor=0 ; minor < Console_Port_Count ; minor++) { |
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281 | /* |
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282 | * First perform the configuration dependent probe, then the |
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283 | * device dependent probe |
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284 | */ |
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285 | port = Console_Port_Tbl[minor]; |
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286 | |
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287 | if ( (!port->deviceProbe || port->deviceProbe(minor)) && |
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288 | port->pDeviceFns->deviceProbe(minor)) { |
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289 | |
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290 | if (port->sDeviceName != NULL) { |
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291 | status = rtems_io_register_name( port->sDeviceName, major, minor ); |
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292 | if (status != RTEMS_SUCCESSFUL) { |
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293 | bsp_fatal( BSP_FATAL_CONSOLE_REGISTER_DEV_0 ); |
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294 | } |
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295 | } |
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296 | |
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297 | if (minor == Console_Port_Minor) { |
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298 | status = rtems_io_register_name( CONSOLE_DEVICE_NAME, major, minor ); |
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299 | if (status != RTEMS_SUCCESSFUL) { |
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300 | bsp_fatal( BSP_FATAL_CONSOLE_REGISTER_DEV_1 ); |
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301 | } |
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302 | } |
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303 | |
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304 | /* |
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305 | * Initialize the hardware device. |
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306 | */ |
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307 | port->pDeviceFns->deviceInitialize(minor); |
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308 | |
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309 | } |
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310 | } |
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311 | |
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312 | return RTEMS_SUCCESSFUL; |
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313 | } |
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