1 | /* |
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2 | * Console driver for Milkymist |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.rtems.org/license/LICENSE. |
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7 | * |
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8 | * COPYRIGHT (c) 2010 Sebastien Bourdeauducq |
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9 | */ |
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10 | |
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11 | #include <unistd.h> |
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12 | #include <termios.h> |
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13 | |
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14 | #include <rtems.h> |
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15 | #include <rtems/bspIo.h> |
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16 | #include <rtems/libio.h> |
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17 | #include <rtems/console.h> |
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18 | #include <rtems/termiostypes.h> |
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19 | #include <bsp/irq-generic.h> |
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20 | |
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21 | #include "../include/system_conf.h" |
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22 | #include "uart.h" |
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23 | |
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24 | BSP_output_char_function_type BSP_output_char = BSP_uart_polled_write; |
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25 | BSP_polling_getchar_function_type BSP_poll_char = BSP_uart_polled_read; |
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26 | |
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27 | static struct rtems_termios_tty *tty; |
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28 | |
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29 | static int mmconsole_first_open(int major, int minor, void *arg) |
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30 | { |
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31 | tty = ((rtems_libio_open_close_args_t *) arg)->iop->data1; |
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32 | return rtems_termios_set_initial_baud(tty, UART_BAUD_RATE); |
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33 | } |
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34 | |
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35 | static int mmconsole_last_close(int major, int minor, void *arg) |
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36 | { |
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37 | return 0; |
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38 | } |
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39 | |
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40 | static int mmconsole_set_attributes(int minor, const struct termios *t) |
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41 | { |
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42 | int baud; |
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43 | |
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44 | switch (t->c_ospeed) { |
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45 | case B0: |
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46 | baud = 0; |
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47 | break; |
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48 | case B50: |
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49 | baud = 50; |
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50 | break; |
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51 | case B75: |
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52 | baud = 75; |
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53 | break; |
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54 | case B110: |
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55 | baud = 110; |
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56 | break; |
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57 | case B134: |
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58 | baud = 134; |
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59 | break; |
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60 | case B150: |
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61 | baud = 150; |
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62 | break; |
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63 | case B200: |
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64 | baud = 200; |
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65 | break; |
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66 | case B300: |
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67 | baud = 300; |
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68 | break; |
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69 | case B600: |
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70 | baud = 600; |
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71 | break; |
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72 | case B1200: |
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73 | baud = 1200; |
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74 | break; |
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75 | case B1800: |
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76 | baud = 1800; |
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77 | break; |
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78 | case B2400: |
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79 | baud = 2400; |
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80 | break; |
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81 | case B4800: |
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82 | baud = 4800; |
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83 | break; |
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84 | case B9600: |
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85 | baud = 9600; |
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86 | break; |
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87 | case B19200: |
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88 | baud = 19200; |
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89 | break; |
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90 | case B38400: |
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91 | baud = 38400; |
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92 | break; |
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93 | case B57600: |
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94 | baud = 57600; |
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95 | break; |
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96 | case B115200: |
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97 | baud = 115200; |
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98 | break; |
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99 | case B230400: |
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100 | baud = 230400; |
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101 | break; |
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102 | case B460800: |
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103 | baud = 460800; |
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104 | break; |
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105 | default: |
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106 | baud = -1; |
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107 | break; |
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108 | } |
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109 | |
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110 | if (baud > 0) |
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111 | MM_WRITE(MM_UART_DIV, MM_READ(MM_FREQUENCY)/baud/16); |
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112 | |
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113 | return 0; |
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114 | } |
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115 | |
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116 | static ssize_t mmconsole_write(int minor, const char *buf, size_t n) |
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117 | { |
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118 | if (n > 0) { |
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119 | MM_WRITE(MM_UART_RXTX, *buf); |
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120 | } |
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121 | |
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122 | return 0; |
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123 | } |
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124 | |
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125 | static rtems_isr mmconsole_interrupt(rtems_vector_number n) |
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126 | { |
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127 | char c; |
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128 | while (MM_READ(MM_UART_STAT) & UART_STAT_RX_EVT) { |
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129 | c = MM_READ(MM_UART_RXTX); |
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130 | MM_WRITE(MM_UART_STAT, UART_STAT_RX_EVT); |
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131 | rtems_termios_enqueue_raw_characters(tty, &c, 1); |
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132 | } |
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133 | if (MM_READ(MM_UART_STAT) & UART_STAT_TX_EVT) { |
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134 | MM_WRITE(MM_UART_STAT, UART_STAT_TX_EVT); |
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135 | rtems_termios_dequeue_characters(tty, 1); |
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136 | } |
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137 | lm32_interrupt_ack(1 << MM_IRQ_UART); |
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138 | } |
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139 | |
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140 | static const rtems_termios_callbacks mmconsole_callbacks = { |
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141 | .firstOpen = mmconsole_first_open, |
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142 | .lastClose = mmconsole_last_close, |
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143 | .pollRead = NULL, |
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144 | .write = mmconsole_write, |
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145 | .setAttributes = mmconsole_set_attributes, |
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146 | .stopRemoteTx = NULL, |
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147 | .startRemoteTx = NULL, |
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148 | .outputUsesInterrupts = TERMIOS_IRQ_DRIVEN |
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149 | }; |
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150 | |
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151 | rtems_device_driver console_initialize( |
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152 | rtems_device_major_number major, |
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153 | rtems_device_minor_number minor, |
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154 | void *arg |
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155 | ) |
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156 | { |
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157 | rtems_status_code status; |
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158 | rtems_isr_entry dummy; |
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159 | |
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160 | rtems_termios_initialize(); |
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161 | |
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162 | status = rtems_io_register_name("/dev/console", major, 0); |
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163 | if (status != RTEMS_SUCCESSFUL) |
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164 | rtems_fatal_error_occurred(status); |
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165 | |
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166 | rtems_interrupt_catch(mmconsole_interrupt, MM_IRQ_UART, &dummy); |
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167 | bsp_interrupt_vector_enable(MM_IRQ_UART); |
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168 | MM_WRITE(MM_UART_CTRL, UART_CTRL_RX_INT|UART_CTRL_TX_INT); |
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169 | |
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170 | return RTEMS_SUCCESSFUL; |
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171 | } |
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172 | |
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173 | rtems_device_driver console_open( |
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174 | rtems_device_major_number major, |
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175 | rtems_device_minor_number minor, |
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176 | void *arg |
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177 | ) |
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178 | { |
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179 | return rtems_termios_open(major, minor, arg, &mmconsole_callbacks); |
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180 | } |
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181 | |
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182 | rtems_device_driver console_close( |
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183 | rtems_device_major_number major, |
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184 | rtems_device_minor_number minor, |
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185 | void *arg |
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186 | ) |
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187 | { |
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188 | return rtems_termios_close(arg); |
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189 | } |
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190 | |
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191 | rtems_device_driver console_read( |
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192 | rtems_device_major_number major, |
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193 | rtems_device_minor_number minor, |
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194 | void *arg |
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195 | ) |
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196 | { |
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197 | return rtems_termios_read(arg); |
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198 | } |
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199 | |
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200 | rtems_device_driver console_write( |
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201 | rtems_device_major_number major, |
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202 | rtems_device_minor_number minor, |
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203 | void *arg |
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204 | ) |
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205 | { |
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206 | return rtems_termios_write(arg); |
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207 | } |
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208 | |
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209 | rtems_device_driver console_control( |
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210 | rtems_device_major_number major, |
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211 | rtems_device_minor_number minor, |
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212 | void *arg |
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213 | ) |
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214 | { |
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215 | return rtems_termios_ioctl(arg); |
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216 | } |
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