1 | /* |
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2 | * This file contains the generic console driver shell used |
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3 | * by all console drivers using libchip. |
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4 | * |
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5 | * This driver uses the termios pseudo driver. |
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6 | * |
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7 | * COPYRIGHT (c) 1989-1997. |
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8 | * On-Line Applications Research Corporation (OAR). |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #include <bsp.h> |
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18 | #include <rtems/libio.h> |
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19 | #include <stdlib.h> |
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20 | #include <assert.h> |
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21 | #include <termios.h> |
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22 | |
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23 | #include <rtems/termiostypes.h> |
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24 | #include <libchip/serial.h> |
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25 | |
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26 | /* |
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27 | * Configuration Information |
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28 | */ |
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29 | |
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30 | extern console_data Console_Port_Data[]; |
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31 | extern unsigned long Console_Port_Count; |
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32 | extern rtems_device_minor_number Console_Port_Minor; |
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33 | |
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34 | /*PAGE |
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35 | * |
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36 | * console_open |
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37 | * |
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38 | * open a port as a termios console. |
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39 | * |
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40 | */ |
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41 | |
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42 | rtems_device_driver console_open( |
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43 | rtems_device_major_number major, |
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44 | rtems_device_minor_number minor, |
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45 | void * arg |
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46 | ) |
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47 | { |
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48 | rtems_status_code status; |
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49 | rtems_libio_open_close_args_t *args = arg; |
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50 | rtems_libio_ioctl_args_t IoctlArgs; |
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51 | struct termios Termios; |
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52 | rtems_termios_callbacks Callbacks; |
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53 | console_tbl *cptr; |
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54 | struct rtems_termios_tty *current_tty; |
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55 | |
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56 | /* |
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57 | * Verify the port number is valid. |
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58 | */ |
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59 | if ( minor > Console_Port_Count ) { |
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60 | return RTEMS_INVALID_NUMBER; |
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61 | } |
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62 | |
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63 | /* |
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64 | * Open the port as a termios console driver. |
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65 | */ |
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66 | |
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67 | cptr = &Console_Port_Tbl[minor]; |
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68 | Callbacks.firstOpen = cptr->pDeviceFns->deviceFirstOpen; |
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69 | Callbacks.lastClose = cptr->pDeviceFns->deviceLastClose; |
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70 | Callbacks.pollRead = cptr->pDeviceFns->deviceRead; |
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71 | Callbacks.write = cptr->pDeviceFns->deviceWrite; |
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72 | Callbacks.setAttributes = cptr->pDeviceFns->deviceSetAttributes; |
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73 | if (cptr->pDeviceFlow != NULL) { |
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74 | Callbacks.stopRemoteTx = cptr->pDeviceFlow->deviceStopRemoteTx; |
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75 | Callbacks.startRemoteTx = cptr->pDeviceFlow->deviceStartRemoteTx; |
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76 | } else { |
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77 | Callbacks.stopRemoteTx = NULL; |
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78 | Callbacks.startRemoteTx = NULL; |
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79 | } |
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80 | Callbacks.outputUsesInterrupts = cptr->pDeviceFns->deviceOutputUsesInterrupts; |
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81 | |
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82 | /* XXX what about |
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83 | * Console_Port_Tbl[minor].ulMargin, |
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84 | * Console_Port_Tbl[minor].ulHysteresis); |
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85 | */ |
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86 | |
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87 | status = rtems_termios_open ( major, minor, arg, &Callbacks ); |
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88 | Console_Port_Data[minor].termios_data = args->iop->data1; |
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89 | |
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90 | /* Get tty pointur from the Console_Port_Data */ |
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91 | current_tty = Console_Port_Data[minor].termios_data; |
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92 | |
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93 | if ( (current_tty->refcount == 1) ) { |
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94 | |
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95 | /* |
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96 | * If this BSP has a preferred default rate, then use that. |
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97 | */ |
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98 | #if defined(BSP_DEFAULT_BAUD_RATE) |
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99 | rtems_termios_set_initial_baud( current_tty, BSP_DEFAULT_BAUD_RATE ); |
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100 | #endif |
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101 | |
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102 | /* |
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103 | * If it's the first open, modified, if need, the port parameters |
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104 | */ |
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105 | if (minor!=Console_Port_Minor) { |
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106 | /* |
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107 | * If this is not the console we do not want ECHO and |
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108 | * so forth |
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109 | */ |
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110 | IoctlArgs.iop=args->iop; |
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111 | IoctlArgs.command=RTEMS_IO_GET_ATTRIBUTES; |
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112 | IoctlArgs.buffer=&Termios; |
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113 | rtems_termios_ioctl(&IoctlArgs); |
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114 | Termios.c_lflag=ICANON; |
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115 | IoctlArgs.command=RTEMS_IO_SET_ATTRIBUTES; |
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116 | rtems_termios_ioctl(&IoctlArgs); |
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117 | } |
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118 | } |
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119 | |
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120 | if ( (args->iop->flags&LIBIO_FLAGS_READ) && |
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121 | Console_Port_Tbl[minor].pDeviceFlow && |
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122 | Console_Port_Tbl[minor].pDeviceFlow->deviceStartRemoteTx) { |
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123 | Console_Port_Tbl[minor].pDeviceFlow->deviceStartRemoteTx(minor); |
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124 | } |
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125 | |
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126 | return status; |
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127 | } |
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128 | |
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129 | /*PAGE |
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130 | * |
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131 | * console_close |
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132 | * |
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133 | * This routine closes a port that has been opened as console. |
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134 | */ |
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135 | |
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136 | rtems_device_driver console_close( |
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137 | rtems_device_major_number major, |
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138 | rtems_device_minor_number minor, |
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139 | void * arg |
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140 | ) |
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141 | { |
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142 | rtems_libio_open_close_args_t *args = arg; |
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143 | struct rtems_termios_tty *current_tty; |
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144 | |
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145 | /* Get tty pointeur from the Console_Port_Data */ |
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146 | current_tty = Console_Port_Data[minor].termios_data; |
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147 | |
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148 | /* Get the tty refcount to determine if we need to do deviceStopRemoteTx. |
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149 | * Stop only if it's the last one opened. |
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150 | */ |
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151 | if ( (current_tty->refcount == 1) ) { |
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152 | if ( (args->iop->flags&LIBIO_FLAGS_READ) && |
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153 | Console_Port_Tbl[minor].pDeviceFlow && |
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154 | Console_Port_Tbl[minor].pDeviceFlow->deviceStopRemoteTx) { |
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155 | Console_Port_Tbl[minor].pDeviceFlow->deviceStopRemoteTx(minor); |
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156 | } |
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157 | } |
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158 | |
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159 | return rtems_termios_close (arg); |
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160 | } |
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161 | |
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162 | /*PAGE |
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163 | * |
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164 | * console_read |
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165 | * |
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166 | * This routine uses the termios driver to read a character. |
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167 | */ |
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168 | |
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169 | rtems_device_driver console_read( |
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170 | rtems_device_major_number major, |
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171 | rtems_device_minor_number minor, |
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172 | void * arg |
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173 | ) |
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174 | { |
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175 | return rtems_termios_read (arg); |
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176 | } |
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177 | |
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178 | /*PAGE |
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179 | * |
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180 | * console_write |
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181 | * |
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182 | * this routine uses the termios driver to write a character. |
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183 | */ |
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184 | |
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185 | rtems_device_driver console_write( |
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186 | rtems_device_major_number major, |
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187 | rtems_device_minor_number minor, |
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188 | void * arg |
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189 | ) |
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190 | { |
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191 | return rtems_termios_write (arg); |
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192 | } |
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193 | |
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194 | /*PAGE |
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195 | * |
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196 | * console_control |
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197 | * |
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198 | * this routine uses the termios driver to process io |
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199 | */ |
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200 | |
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201 | rtems_device_driver console_control( |
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202 | rtems_device_major_number major, |
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203 | rtems_device_minor_number minor, |
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204 | void * arg |
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205 | ) |
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206 | { |
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207 | return rtems_termios_ioctl (arg); |
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208 | } |
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209 | |
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210 | /*PAGE |
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211 | * |
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212 | * console_initialize |
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213 | * |
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214 | * Routine called to initialize the console device driver. |
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215 | */ |
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216 | |
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217 | rtems_device_driver console_initialize( |
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218 | rtems_device_major_number major, |
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219 | rtems_device_minor_number minor_arg, |
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220 | void *arg |
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221 | ) |
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222 | { |
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223 | rtems_status_code status; |
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224 | rtems_device_minor_number minor; |
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225 | |
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226 | /* |
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227 | * initialize the termio interface. |
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228 | */ |
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229 | |
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230 | rtems_termios_initialize(); |
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231 | |
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232 | for (minor=0; minor < Console_Port_Count ; minor++) { |
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233 | /* |
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234 | * First perform the configuration dependent probe, then the |
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235 | * device dependent probe |
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236 | */ |
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237 | |
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238 | if ((!Console_Port_Tbl[minor].deviceProbe || |
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239 | Console_Port_Tbl[minor].deviceProbe(minor)) && |
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240 | Console_Port_Tbl[minor].pDeviceFns->deviceProbe(minor)) { |
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241 | /* |
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242 | * Use this device for the console |
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243 | */ |
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244 | break; |
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245 | } |
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246 | } |
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247 | if ( minor == Console_Port_Count ) { |
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248 | /* |
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249 | * Failed to find a working device |
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250 | */ |
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251 | rtems_fatal_error_occurred(RTEMS_IO_ERROR); |
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252 | } |
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253 | |
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254 | Console_Port_Minor=minor; |
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255 | |
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256 | /* |
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257 | * Register Device Names |
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258 | */ |
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259 | status = rtems_io_register_name("/dev/console", major, Console_Port_Minor ); |
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260 | if (status != RTEMS_SUCCESSFUL) { |
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261 | rtems_fatal_error_occurred(status); |
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262 | } |
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263 | Console_Port_Tbl[minor].pDeviceFns->deviceInitialize(Console_Port_Minor); |
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264 | |
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265 | for (minor++;minor<Console_Port_Count;minor++) { |
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266 | /* |
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267 | * First perform the configuration dependent probe, then the |
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268 | * device dependent probe |
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269 | */ |
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270 | |
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271 | if ( (!Console_Port_Tbl[minor].deviceProbe || |
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272 | Console_Port_Tbl[minor].deviceProbe(minor)) && |
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273 | Console_Port_Tbl[minor].pDeviceFns->deviceProbe(minor)) { |
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274 | status = rtems_io_register_name( |
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275 | Console_Port_Tbl[minor].sDeviceName, |
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276 | major, |
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277 | minor ); |
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278 | if (status != RTEMS_SUCCESSFUL) { |
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279 | rtems_fatal_error_occurred(status); |
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280 | } |
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281 | |
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282 | /* |
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283 | * Initialize the hardware device. |
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284 | */ |
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285 | |
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286 | Console_Port_Tbl[minor].pDeviceFns->deviceInitialize(minor); |
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287 | |
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288 | } |
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289 | } |
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290 | |
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291 | return RTEMS_SUCCESSFUL; |
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292 | } |
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