1 | /*************************************************************************** |
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2 | * |
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3 | * $Header$ |
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4 | * |
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5 | * MODULE DESCRIPTION: |
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6 | * This module implements the RTEMS drivers for the PC serial ports |
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7 | * as /dev/ttyS1 for COM1 and /dev/ttyS2 as COM2. If one of the ports |
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8 | * is used as the console, this driver would fail to initialize. |
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9 | * |
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10 | * This code was based on the console driver. It is based on the |
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11 | * current termios framework. This is just a shell around the |
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12 | * termios support. |
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13 | * |
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14 | * by: Rosimildo da Silva: |
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15 | * rdasilva@connecttel.com |
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16 | * http://www.connecttel.com |
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17 | * |
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18 | * MODIFICATION/HISTORY: |
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19 | * |
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20 | * $Log$ |
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21 | * Revision 1.4 2001/07/03 17:56:32 joel |
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22 | * 2001-07-03 Mike Seirs <mike@poliac.com> |
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23 | * |
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24 | * * comm/tty_drv.c, comm/uart.c, comm/uart.h: Adds the capability |
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25 | * to use task driven serial I/O to ti386 BSPs. This patch leaves thex |
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26 | * default I/O mode to be IRQ. If you want to use task I/O mode, |
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27 | * then the tty_drv.c file needs to be modified. Basically, all |
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28 | * you need to change is the data values of the termios callbacks |
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29 | * structure. This callback structure is used in the tty1_open |
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30 | * and tty2_open functions. The values you need to set are commented |
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31 | * out in the source code. |
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32 | * |
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33 | * Revision 1.3 2000/12/05 16:37:38 joel |
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34 | * 2000-12-01 Joel Sherrill <joel@OARcorp.com> |
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35 | * |
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36 | * * pc386/console/console.c, pc386/console/serial_mouse.c, |
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37 | * pc386/console/vgainit.c, shared/comm/tty_drv.c: Remove warnings. |
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38 | * |
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39 | * Revision 1.2 2000/10/18 16:10:50 joel |
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40 | * 2000-10-18 Charles-Antoine Gauthier <charles.gauthier@nrc.ca> |
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41 | * |
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42 | * * comm/i386-stub-glue.c, comm/tty_drv.c, comm/uart.c, comm/uart.h: |
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43 | * Add the ability to set parity, number of data bits and |
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44 | * number of stop bits to the existing i386 serial drivers. |
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45 | * |
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46 | * Revision 1.1 2000/08/30 08:18:56 joel |
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47 | * 2000-08-26 Rosimildo da Silva <rdasilva@connecttel.com> |
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48 | * |
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49 | * * shared/comm: Added "/dev/ttyS1" & "/dev/ttyS2" support for |
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50 | * the i386 BSPs. |
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51 | * * shared/comm/gdb_glue.c: New file. |
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52 | * * shared/comm/i386_io.c: New file. |
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53 | * * shared/comm/tty_drv.c: New file. |
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54 | * * shared/comm/tty_drv.h: New file. |
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55 | * * shared/comm/Makefile.am: Account for new files. |
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56 | * * shared/comm/uart.c: Adds support for sending characters to |
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57 | * another "line discipline." |
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58 | * |
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59 | ****************************************************************************/ |
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60 | |
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61 | #include <stdio.h> |
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62 | #include <stdlib.h> |
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63 | #include <assert.h> |
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64 | |
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65 | #include <bsp.h> |
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66 | #include <irq.h> |
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67 | #include <rtems/libio.h> |
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68 | #include <rtems/termiostypes.h> |
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69 | #include <termios.h> |
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70 | #include <uart.h> |
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71 | #include <libcpu/cpuModel.h> |
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72 | |
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73 | int BSP_poll_read(int); |
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74 | |
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75 | /* Internal routines */ |
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76 | static int tty1_conSetAttr( int minor, const struct termios *t); |
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77 | static int tty2_conSetAttr( int minor, const struct termios *t); |
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78 | static void isr_on(const rtems_irq_connect_data *); |
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79 | static void isr_off(const rtems_irq_connect_data *); |
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80 | static int isr_is_on(const rtems_irq_connect_data *); |
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81 | |
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82 | |
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83 | extern BSP_polling_getchar_function_type BSP_poll_char; |
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84 | extern int BSPConsolePort; |
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85 | extern void rtems_set_waiting_id_comx( int port, rtems_id id, rtems_event_set event ); |
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86 | |
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87 | |
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88 | /* |
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89 | * Interrupt structure for tty1 |
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90 | */ |
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91 | static rtems_irq_connect_data tty1_isr_data = |
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92 | { |
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93 | BSP_UART_COM1_IRQ, |
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94 | BSP_uart_termios_isr_com1, |
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95 | isr_on, |
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96 | isr_off, |
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97 | isr_is_on}; |
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98 | |
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99 | /* |
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100 | * Interrupt structure for tty2 |
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101 | */ |
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102 | static rtems_irq_connect_data tty2_isr_data = |
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103 | { |
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104 | BSP_UART_COM2_IRQ, |
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105 | BSP_uart_termios_isr_com2, |
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106 | isr_on, |
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107 | isr_off, |
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108 | isr_is_on}; |
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109 | |
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110 | static void |
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111 | isr_on(const rtems_irq_connect_data *unused) |
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112 | { |
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113 | return; |
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114 | } |
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115 | |
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116 | static void |
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117 | isr_off(const rtems_irq_connect_data *unused) |
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118 | { |
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119 | return; |
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120 | } |
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121 | |
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122 | static int |
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123 | isr_is_on(const rtems_irq_connect_data *irq) |
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124 | { |
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125 | return BSP_irq_enabled_at_i8259s(irq->name); |
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126 | } |
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127 | |
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128 | void tty_reserve_resources(rtems_configuration_table *conf) |
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129 | { |
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130 | rtems_termios_reserve_resources(conf, 1); |
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131 | return; |
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132 | } |
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133 | |
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134 | /* |
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135 | * TTYS1 - device driver INITIALIZE entry point. |
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136 | */ |
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137 | rtems_device_driver |
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138 | tty1_initialize(rtems_device_major_number major, |
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139 | rtems_device_minor_number minor, |
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140 | void *arg) |
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141 | { |
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142 | rtems_status_code status; |
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143 | |
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144 | /* Check if this port is not been used as console */ |
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145 | if( BSPConsolePort == BSP_UART_COM1 ) |
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146 | { |
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147 | status = -1; |
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148 | printk("TTYS1: port selected as console.\n"); |
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149 | rtems_fatal_error_occurred( status ); |
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150 | } |
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151 | |
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152 | /* |
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153 | * Set up TERMIOS |
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154 | */ |
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155 | rtems_termios_initialize(); |
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156 | |
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157 | /* |
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158 | * Do device-specific initialization |
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159 | */ |
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160 | /* 9600-8-N-1, without hardware flow control */ |
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161 | BSP_uart_init( BSP_UART_COM1, 9600, CHR_8_BITS, 0, 0, 0 ); |
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162 | status = BSP_install_rtems_irq_handler( &tty1_isr_data ); |
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163 | if( !status ) |
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164 | { |
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165 | printk("Error installing ttyS1 interrupt handler!\n"); |
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166 | rtems_fatal_error_occurred(status); |
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167 | } |
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168 | /* |
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169 | * Register the device |
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170 | */ |
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171 | status = rtems_io_register_name ("/dev/ttyS1", major, 0); |
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172 | if (status != RTEMS_SUCCESSFUL) |
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173 | { |
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174 | printk("Error registering ttyS1 device!\n"); |
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175 | rtems_fatal_error_occurred (status); |
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176 | } |
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177 | printk("Device: /dev/ttyS1 initialized.\n"); |
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178 | return RTEMS_SUCCESSFUL; |
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179 | } /* tty_initialize */ |
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180 | |
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181 | |
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182 | static int tty1_last_close(int major, int minor, void *arg) |
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183 | { |
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184 | BSP_remove_rtems_irq_handler( &tty1_isr_data ); |
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185 | return 0; |
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186 | } |
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187 | |
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188 | /* |
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189 | * TTY1 - device driver OPEN entry point |
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190 | */ |
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191 | rtems_device_driver |
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192 | tty1_open(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 | rtems_status_code status; |
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197 | #ifndef USE_TASK_DRIVEN |
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198 | static rtems_termios_callbacks cb = |
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199 | { |
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200 | NULL, /* firstOpen */ |
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201 | tty1_last_close, /* lastClose */ |
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202 | NULL, /* poll read */ |
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203 | BSP_uart_termios_write_com1, /* write */ |
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204 | tty1_conSetAttr, /* setAttributes */ |
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205 | NULL, /* stopRemoteTx */ |
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206 | NULL, /* startRemoteTx */ |
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207 | TERMIOS_IRQ_DRIVEN /* outputUsesInterrupts */ |
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208 | }; |
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209 | #else |
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210 | static rtems_termios_callbacks cb = |
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211 | { |
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212 | NULL, /* firstOpen */ |
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213 | NULL, /* lastClose */ |
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214 | BSP_uart_termios_read_com1, /* poll read */ |
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215 | BSP_uart_termios_write_com1, /* write */ |
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216 | tty1_conSetAttr, /* setAttributes */ |
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217 | NULL, /* stopRemoteTx */ |
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218 | NULL, /* startRemoteTx */ |
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219 | TERMIOS_TASK_DRIVEN /* outputUsesInterrupts */ |
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220 | }; |
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221 | #endif |
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222 | |
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223 | status = rtems_termios_open( major, minor, arg, &cb ); |
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224 | if(status != RTEMS_SUCCESSFUL) |
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225 | { |
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226 | printk("Error openning tty1 device\n"); |
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227 | return status; |
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228 | } |
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229 | |
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230 | /* |
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231 | * Pass data area info down to driver |
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232 | */ |
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233 | BSP_uart_termios_set( BSP_UART_COM1, |
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234 | ((rtems_libio_open_close_args_t *)arg)->iop->data1 ); |
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235 | /* Enable interrupts on channel */ |
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236 | BSP_uart_intr_ctrl( BSP_UART_COM1, BSP_UART_INTR_CTRL_TERMIOS); |
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237 | return RTEMS_SUCCESSFUL; |
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238 | } |
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239 | |
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240 | /* |
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241 | * TTY - device driver CLOSE entry point |
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242 | */ |
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243 | rtems_device_driver |
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244 | tty_close(rtems_device_major_number major, |
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245 | rtems_device_minor_number minor, |
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246 | void *arg) |
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247 | { |
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248 | |
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249 | return (rtems_termios_close (arg)); |
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250 | |
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251 | } /* tty_close */ |
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252 | |
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253 | |
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254 | /* |
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255 | * TTY device driver READ entry point. |
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256 | * Read characters from the tty device. |
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257 | */ |
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258 | rtems_device_driver |
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259 | tty_read(rtems_device_major_number major, |
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260 | rtems_device_minor_number minor, |
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261 | void *arg) |
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262 | { |
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263 | return rtems_termios_read (arg); |
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264 | } /* tty_read */ |
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265 | |
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266 | |
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267 | /* |
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268 | * TTY device driver WRITE entry point. |
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269 | * Write characters to the tty device. |
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270 | */ |
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271 | rtems_device_driver |
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272 | tty_write(rtems_device_major_number major, |
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273 | rtems_device_minor_number minor, |
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274 | void * arg) |
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275 | { |
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276 | return rtems_termios_write (arg); |
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277 | |
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278 | } /* tty_write */ |
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279 | |
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280 | /* |
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281 | * Handle ioctl request. This is a generic internal |
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282 | * routine to handle both devices. |
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283 | */ |
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284 | static rtems_device_driver tty_control( int port, void *arg ) |
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285 | { |
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286 | rtems_libio_ioctl_args_t *args = arg; |
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287 | switch( args->command ) |
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288 | { |
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289 | default: |
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290 | return rtems_termios_ioctl (arg); |
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291 | break; |
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292 | } |
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293 | args->ioctl_return = 0; |
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294 | return RTEMS_SUCCESSFUL; |
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295 | } |
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296 | |
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297 | |
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298 | |
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299 | /* |
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300 | * Handle ioctl request for ttyS1. |
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301 | */ |
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302 | rtems_device_driver |
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303 | tty1_control(rtems_device_major_number major, |
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304 | rtems_device_minor_number minor, |
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305 | void * arg |
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306 | ) |
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307 | { |
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308 | return tty_control( BSP_UART_COM1, arg ); |
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309 | } |
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310 | |
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311 | |
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312 | static int |
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313 | conSetAttr(int port, int minor, const struct termios *t) |
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314 | { |
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315 | unsigned long baud, databits, parity, stopbits; |
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316 | |
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317 | switch (t->c_cflag & CBAUD) |
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318 | { |
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319 | case B50: |
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320 | baud = 50; |
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321 | break; |
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322 | case B75: |
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323 | baud = 75; |
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324 | break; |
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325 | case B110: |
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326 | baud = 110; |
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327 | break; |
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328 | case B134: |
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329 | baud = 134; |
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330 | break; |
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331 | case B150: |
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332 | baud = 150; |
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333 | break; |
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334 | case B200: |
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335 | baud = 200; |
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336 | break; |
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337 | case B300: |
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338 | baud = 300; |
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339 | break; |
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340 | case B600: |
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341 | baud = 600; |
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342 | break; |
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343 | case B1200: |
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344 | baud = 1200; |
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345 | break; |
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346 | case B1800: |
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347 | baud = 1800; |
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348 | break; |
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349 | case B2400: |
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350 | baud = 2400; |
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351 | break; |
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352 | case B4800: |
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353 | baud = 4800; |
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354 | break; |
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355 | case B9600: |
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356 | baud = 9600; |
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357 | break; |
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358 | case B19200: |
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359 | baud = 19200; |
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360 | break; |
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361 | case B38400: |
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362 | baud = 38400; |
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363 | break; |
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364 | case B57600: |
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365 | baud = 57600; |
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366 | break; |
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367 | case B115200: |
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368 | baud = 115200; |
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369 | break; |
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370 | default: |
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371 | baud = 0; |
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372 | rtems_fatal_error_occurred (RTEMS_INTERNAL_ERROR); |
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373 | return 0; |
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374 | } |
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375 | if (t->c_cflag & PARENB) { |
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376 | /* Parity is enabled */ |
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377 | if (t->c_cflag & PARODD) { |
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378 | /* Parity is odd */ |
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379 | parity = PEN; |
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380 | } |
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381 | else { |
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382 | /* Parity is even */ |
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383 | parity = PEN | EPS; |
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384 | } |
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385 | } |
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386 | else { |
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387 | /* No parity */ |
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388 | parity = 0; |
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389 | } |
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390 | |
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391 | switch (t->c_cflag & CSIZE) { |
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392 | case CS5: databits = CHR_5_BITS; break; |
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393 | case CS6: databits = CHR_6_BITS; break; |
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394 | case CS7: databits = CHR_7_BITS; break; |
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395 | default: /* just to avoid warnings -- all cases are covered */ |
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396 | case CS8: databits = CHR_8_BITS; break; |
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397 | } |
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398 | |
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399 | if (t->c_cflag & CSTOPB) { |
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400 | /* 2 stop bits */ |
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401 | stopbits = STB; |
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402 | } |
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403 | else { |
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404 | /* 1 stop bit */ |
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405 | stopbits = 0; |
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406 | } |
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407 | |
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408 | printk("Setting attributes, port=%X, baud=%d, linemode = 0x%02x\n", port, baud, databits | parity | stopbits ); |
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409 | BSP_uart_set_attributes(port, baud, databits, parity, stopbits); |
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410 | return 0; |
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411 | } |
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412 | |
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413 | /* |
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414 | * Handle ioctl request for ttyS2. |
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415 | */ |
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416 | static int |
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417 | tty1_conSetAttr( int minor, const struct termios *t) |
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418 | { |
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419 | return conSetAttr( BSP_UART_COM1, minor, t ); |
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420 | } |
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421 | |
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422 | |
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423 | |
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424 | /* |
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425 | * TTY2 device driver INITIALIZE entry point. |
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426 | */ |
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427 | rtems_device_driver |
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428 | tty2_initialize(rtems_device_major_number major, |
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429 | rtems_device_minor_number minor, |
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430 | void *arg) |
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431 | { |
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432 | rtems_status_code status; |
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433 | |
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434 | /* Check if this port is not been used as console */ |
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435 | if( BSPConsolePort == BSP_UART_COM2 ) |
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436 | { |
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437 | status = -1; |
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438 | printk("TTY2: port selected as console.\n"); |
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439 | rtems_fatal_error_occurred( status ); |
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440 | } |
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441 | |
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442 | /* |
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443 | * Set up TERMIOS |
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444 | */ |
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445 | rtems_termios_initialize(); |
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446 | |
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447 | /* |
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448 | * Do device-specific initialization |
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449 | */ |
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450 | /* 9600-8-N-1, without hardware flow control */ |
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451 | BSP_uart_init( BSP_UART_COM2, 9600, CHR_8_BITS, 0, 0, 0); |
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452 | status = BSP_install_rtems_irq_handler( &tty2_isr_data ); |
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453 | if( !status ) |
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454 | { |
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455 | printk("Error installing serial console interrupt handler!\n"); |
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456 | rtems_fatal_error_occurred(status); |
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457 | } |
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458 | /* |
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459 | * Register the device |
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460 | */ |
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461 | status = rtems_io_register_name ("/dev/ttyS2", major, 0); |
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462 | if (status != RTEMS_SUCCESSFUL) |
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463 | { |
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464 | printk("Error registering tty2 device!\n"); |
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465 | rtems_fatal_error_occurred (status); |
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466 | } |
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467 | printk("Device: /dev/ttyS2 initialized.\n"); |
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468 | return RTEMS_SUCCESSFUL; |
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469 | } /* tty_initialize */ |
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470 | |
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471 | |
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472 | static int tty2_last_close(int major, int minor, void *arg) |
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473 | { |
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474 | BSP_remove_rtems_irq_handler( &tty2_isr_data ); |
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475 | return 0; |
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476 | } |
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477 | |
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478 | /* |
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479 | * TTY2 device driver OPEN entry point |
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480 | */ |
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481 | rtems_device_driver |
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482 | tty2_open(rtems_device_major_number major, |
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483 | rtems_device_minor_number minor, |
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484 | void *arg) |
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485 | { |
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486 | rtems_status_code status; |
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487 | #ifndef USE_TASK_DRIVEN |
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488 | static rtems_termios_callbacks cb = |
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489 | { |
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490 | NULL, /* firstOpen */ |
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491 | tty2_last_close, /* lastClose */ |
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492 | NULL, /* poll read */ |
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493 | BSP_uart_termios_write_com2, /* write */ |
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494 | tty2_conSetAttr, /* setAttributes */ |
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495 | NULL, /* stopRemoteTx */ |
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496 | NULL, /* startRemoteTx */ |
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497 | TERMIOS_IRQ_DRIVEN /* outputUsesInterrupts */ |
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498 | }; |
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499 | #else |
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500 | static rtems_termios_callbacks cb = |
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501 | { |
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502 | NULL, /* firstOpen */ |
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503 | NULL, /* lastClose */ |
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504 | BSP_uart_termios_read_com2, /* poll read */ |
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505 | BSP_uart_termios_write_com2, /* write */ |
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506 | tty2_conSetAttr, /* setAttributes */ |
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507 | NULL, /* stopRemoteTx */ |
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508 | NULL, /* startRemoteTx */ |
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509 | TERMIOS_TASK_DRIVEN /* outputUsesInterrupts */ |
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510 | }; |
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511 | #endif |
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512 | |
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513 | status = rtems_termios_open (major, minor, arg, &cb); |
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514 | if(status != RTEMS_SUCCESSFUL) |
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515 | { |
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516 | printk("Error openning tty1 device\n"); |
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517 | return status; |
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518 | } |
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519 | |
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520 | /* |
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521 | * Pass data area info down to driver |
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522 | */ |
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523 | BSP_uart_termios_set( BSP_UART_COM2, |
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524 | ((rtems_libio_open_close_args_t *)arg)->iop->data1 ); |
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525 | /* Enable interrupts on channel */ |
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526 | BSP_uart_intr_ctrl( BSP_UART_COM2, BSP_UART_INTR_CTRL_TERMIOS); |
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527 | return RTEMS_SUCCESSFUL; |
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528 | } |
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529 | |
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530 | /* |
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531 | * Handle ioctl request for TTY2 |
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532 | */ |
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533 | rtems_device_driver |
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534 | tty2_control(rtems_device_major_number major, |
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535 | rtems_device_minor_number minor, |
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536 | void * arg |
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537 | ) |
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538 | { |
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539 | return tty_control( BSP_UART_COM2, arg ); |
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540 | } |
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541 | |
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542 | static int |
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543 | tty2_conSetAttr( int minor, const struct termios *t) |
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544 | { |
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545 | return conSetAttr( BSP_UART_COM2, minor, t ); |
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546 | } |
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