1 | /* |
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2 | * This file contains the TTY driver for the serial ports on the LEON. |
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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 | * COPYRIGHT (c) 1989-1998. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * Modified for LEON3 BSP. |
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10 | * COPYRIGHT (c) 2004. |
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11 | * Gaisler Research. |
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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.com/license/LICENSE. |
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16 | * |
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17 | * $Id$ |
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18 | */ |
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19 | |
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20 | #include <bsp.h> |
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21 | #include <rtems/libio.h> |
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22 | #include <stdlib.h> |
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23 | #include <assert.h> |
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24 | #include <rtems/bspIo.h> |
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25 | #include <amba.h> |
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26 | |
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27 | /* |
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28 | * Should we use a polled or interrupt drived console? |
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29 | * |
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30 | * NOTE: This is defined in the custom/leon.cfg file. |
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31 | */ |
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32 | |
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33 | /* |
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34 | * console_outbyte_polled |
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35 | * |
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36 | * This routine transmits a character using polling. |
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37 | */ |
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38 | |
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39 | void console_outbyte_polled( |
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40 | int port, |
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41 | char ch |
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42 | ); |
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43 | |
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44 | /* body is in debugputs.c */ |
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45 | |
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46 | /* |
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47 | * console_inbyte_nonblocking |
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48 | * |
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49 | * This routine polls for a character. |
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50 | */ |
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51 | |
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52 | int console_inbyte_nonblocking( int port ); |
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53 | |
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54 | /* body is in debugputs.c */ |
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55 | |
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56 | |
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57 | /* |
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58 | * Console Termios Support Entry Points |
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59 | * |
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60 | */ |
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61 | |
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62 | int console_write_support (int minor, const char *buf, int len) |
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63 | { |
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64 | int nwrite = 0; |
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65 | |
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66 | while (nwrite < len) { |
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67 | console_outbyte_polled( minor, *buf++ ); |
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68 | nwrite++; |
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69 | } |
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70 | return nwrite; |
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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 | * Console Device Driver Entry Points |
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76 | * |
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77 | */ |
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78 | int uarts = 0; |
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79 | static int isinit = 0; |
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80 | volatile LEON3_UART_Regs_Map *LEON3_Console_Uart[LEON3_APBUARTS]; |
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81 | |
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82 | int scan_uarts(void) { |
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83 | int i; |
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84 | amba_apb_device apbuarts[LEON3_APBUARTS]; |
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85 | |
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86 | if (isinit == 0) { |
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87 | i = 0; |
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88 | uarts = 0; |
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89 | |
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90 | uarts = amba_find_apbslvs( |
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91 | &amba_conf, VENDOR_GAISLER, GAISLER_APBUART, apbuarts, LEON3_APBUARTS); |
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92 | for(i=0; i<uarts; i++) { |
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93 | LEON3_Console_Uart[i] = (volatile LEON3_UART_Regs_Map *)apbuarts[i].start; |
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94 | } |
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95 | isinit = 1; |
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96 | } |
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97 | return uarts; |
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98 | } |
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99 | |
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100 | rtems_device_driver console_initialize( |
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101 | rtems_device_major_number major, |
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102 | rtems_device_minor_number minor, |
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103 | void *arg |
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104 | ) |
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105 | { |
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106 | rtems_status_code status; |
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107 | int i, uart0; |
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108 | char console_name[16]; |
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109 | |
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110 | rtems_termios_initialize(); |
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111 | |
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112 | /* Find UARTs */ |
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113 | scan_uarts(); |
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114 | |
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115 | /* default to zero and override if multiprocessing */ |
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116 | uart0 = 0; |
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117 | #if defined(RTEMS_MULTIPROCESSING) |
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118 | if (rtems_configuration_get_user_multiprocessing_table() != NULL) |
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119 | uart0 = LEON3_Cpu_Index; |
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120 | #endif |
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121 | |
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122 | /* Register Device Names */ |
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123 | |
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124 | if (uarts && (uart0 < uarts)) |
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125 | { |
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126 | status = rtems_io_register_name( "/dev/console", major, 0 ); |
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127 | if (status != RTEMS_SUCCESSFUL) |
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128 | rtems_fatal_error_occurred(status); |
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129 | |
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130 | strcpy(console_name,"/dev/console_a"); |
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131 | for (i = uart0+1; i < uarts; i++) |
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132 | { |
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133 | console_name[13]++; |
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134 | status = rtems_io_register_name( console_name, major, i); |
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135 | } |
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136 | } |
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137 | |
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138 | |
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139 | /* |
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140 | * Initialize Hardware if ONLY CPU or first CPU in MP system |
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141 | */ |
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142 | |
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143 | #if defined(RTEMS_MULTIPROCESSING) |
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144 | if (rtems_configuration_get_user_multiprocessing_table()->node == 1) |
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145 | #endif |
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146 | { |
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147 | for (i = uart0; i < uarts; i++) |
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148 | { |
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149 | LEON3_Console_Uart[i]->ctrl |= |
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150 | LEON_REG_UART_CTRL_RE | LEON_REG_UART_CTRL_TE; |
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151 | LEON3_Console_Uart[i]->status = 0; |
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152 | } |
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153 | } |
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154 | |
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155 | return RTEMS_SUCCESSFUL; |
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156 | } |
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157 | |
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158 | rtems_device_driver console_open( |
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159 | rtems_device_major_number major, |
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160 | rtems_device_minor_number minor, |
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161 | void * arg |
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162 | ) |
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163 | { |
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164 | rtems_status_code sc; |
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165 | |
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166 | static const rtems_termios_callbacks pollCallbacks = { |
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167 | NULL, /* firstOpen */ |
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168 | NULL, /* lastClose */ |
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169 | console_inbyte_nonblocking, /* pollRead */ |
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170 | console_write_support, /* write */ |
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171 | NULL, /* setAttributes */ |
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172 | NULL, /* stopRemoteTx */ |
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173 | NULL, /* startRemoteTx */ |
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174 | 0 /* outputUsesInterrupts */ |
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175 | }; |
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176 | |
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177 | |
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178 | assert( minor <= LEON3_APBUARTS ); |
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179 | if ( minor > LEON3_APBUARTS ) |
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180 | return RTEMS_INVALID_NUMBER; |
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181 | |
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182 | sc = rtems_termios_open (major, minor, arg, &pollCallbacks); |
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183 | |
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184 | |
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185 | return RTEMS_SUCCESSFUL; |
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186 | } |
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187 | |
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188 | rtems_device_driver console_close( |
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189 | rtems_device_major_number major, |
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190 | rtems_device_minor_number minor, |
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191 | void * arg |
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192 | ) |
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193 | { |
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194 | return rtems_termios_close (arg); |
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195 | } |
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196 | |
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197 | rtems_device_driver console_read( |
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198 | rtems_device_major_number major, |
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199 | rtems_device_minor_number minor, |
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200 | void * arg |
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201 | ) |
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202 | { |
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203 | return rtems_termios_read (arg); |
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204 | } |
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205 | |
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206 | rtems_device_driver console_write( |
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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 | return rtems_termios_write (arg); |
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213 | } |
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214 | |
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215 | rtems_device_driver console_control( |
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216 | rtems_device_major_number major, |
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217 | rtems_device_minor_number minor, |
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218 | void * arg |
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219 | ) |
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220 | { |
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221 | return rtems_termios_ioctl (arg); |
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222 | } |
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223 | |
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