1 | /* |
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2 | * RTEMS termios device support internal data structures |
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3 | * |
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4 | * COPYRIGHT (c) 1989-2000. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.OARcorp.com/rtems/license.html. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #ifndef TERMIOSTYPES_H |
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15 | #define TERMIOSTYPES_H |
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16 | |
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17 | #include <rtems.h> |
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18 | #include <rtems/libio.h> |
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19 | |
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20 | #ifdef __cplusplus |
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21 | extern "C" { |
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22 | #endif |
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23 | |
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24 | /* |
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25 | * Wakeup callback data structure |
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26 | */ |
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27 | struct ttywakeup { |
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28 | void (*sw_pfn)__P((struct termios *tty, void *arg)); |
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29 | void *sw_arg; |
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30 | }; |
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31 | |
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32 | /* |
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33 | * Variables associated with the character buffer |
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34 | */ |
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35 | struct rtems_termios_rawbuf { |
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36 | volatile char *theBuf; |
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37 | volatile unsigned int Head; |
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38 | volatile unsigned int Tail; |
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39 | volatile unsigned int Size; |
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40 | rtems_id Semaphore; |
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41 | }; |
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42 | /* |
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43 | * Variables associated with each termios instance. |
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44 | * One structure for each hardware I/O device. |
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45 | */ |
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46 | struct rtems_termios_tty { |
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47 | /* |
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48 | * Linked-list of active TERMIOS devices |
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49 | */ |
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50 | struct rtems_termios_tty *forw; |
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51 | struct rtems_termios_tty *back; |
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52 | |
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53 | /* |
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54 | * How many times has this device been opened |
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55 | */ |
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56 | int refcount; |
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57 | |
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58 | /* |
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59 | * This device |
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60 | */ |
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61 | rtems_device_major_number major; |
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62 | rtems_device_major_number minor; |
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63 | |
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64 | /* |
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65 | * Mutual-exclusion semaphores |
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66 | */ |
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67 | rtems_id isem; |
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68 | rtems_id osem; |
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69 | |
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70 | /* |
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71 | * The canonical (cooked) character buffer |
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72 | */ |
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73 | char *cbuf; |
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74 | int ccount; |
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75 | int cindex; |
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76 | |
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77 | /* |
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78 | * Keep track of cursor (printhead) position |
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79 | */ |
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80 | int column; |
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81 | int read_start_column; |
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82 | |
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83 | /* |
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84 | * The ioctl settings |
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85 | */ |
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86 | struct termios termios; |
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87 | rtems_interval vtimeTicks; |
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88 | |
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89 | /* |
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90 | * Raw input character buffer |
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91 | */ |
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92 | struct rtems_termios_rawbuf rawInBuf; |
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93 | rtems_unsigned32 rawInBufSemaphoreOptions; |
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94 | rtems_interval rawInBufSemaphoreTimeout; |
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95 | rtems_interval rawInBufSemaphoreFirstTimeout; |
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96 | unsigned int rawInBufDropped; /* Statistics */ |
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97 | |
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98 | /* |
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99 | * Raw output character buffer |
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100 | */ |
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101 | struct rtems_termios_rawbuf rawOutBuf; |
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102 | int t_dqlen; /* count of characters dequeued from device */ |
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103 | enum {rob_idle, rob_busy, rob_wait } rawOutBufState; |
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104 | |
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105 | /* |
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106 | * Callbacks to device-specific routines |
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107 | */ |
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108 | rtems_termios_callbacks device; |
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109 | volatile unsigned int flow_ctrl; |
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110 | unsigned int lowwater,highwater; |
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111 | |
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112 | /* |
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113 | * I/O task IDs (for task-driven drivers) |
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114 | */ |
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115 | rtems_id rxTaskId; |
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116 | rtems_id txTaskId; |
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117 | /* |
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118 | * line discipline related stuff |
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119 | */ |
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120 | int t_line; /* id of line discipline */ |
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121 | void *t_sc; /* hook for discipline-specific data structure */ |
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122 | /* |
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123 | * Wakeup callback variables |
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124 | */ |
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125 | struct ttywakeup tty_snd; |
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126 | struct ttywakeup tty_rcv; |
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127 | int tty_rcvwakeup; |
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128 | }; |
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129 | |
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130 | struct linesw { |
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131 | int (*l_open) (struct rtems_termios_tty *tp); |
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132 | int (*l_close)(struct rtems_termios_tty *tp); |
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133 | int (*l_read )(struct rtems_termios_tty *tp,rtems_libio_rw_args_t *args); |
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134 | int (*l_write)(struct rtems_termios_tty *tp,rtems_libio_rw_args_t *args); |
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135 | int (*l_rint )(int c,struct rtems_termios_tty *tp); |
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136 | int (*l_start)(struct rtems_termios_tty *tp); |
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137 | int (*l_ioctl)(struct rtems_termios_tty *tp,rtems_libio_ioctl_args_t *args); |
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138 | int (*l_modem)(struct rtems_termios_tty *tp,int flags); |
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139 | }; |
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140 | |
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141 | /* |
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142 | * FIXME: this should move to libio.h! |
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143 | * values for rtems_termios_callbacks.outputUsesInterrupts |
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144 | */ |
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145 | #define TERMIOS_POLLED 0 |
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146 | #define TERMIOS_IRQ_DRIVEN 1 |
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147 | #define TERMIOS_TASK_DRIVEN 2 |
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148 | |
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149 | |
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150 | /* |
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151 | * FIXME: this should move to termios.h! |
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152 | */ |
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153 | void rtems_termios_rxirq_occured(struct rtems_termios_tty *tty); |
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154 | /* |
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155 | * FIXME: this should move to termios.h! |
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156 | * put a string to output ring buffer |
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157 | */ |
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158 | void rtems_termios_puts (const char *buf, |
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159 | int len, |
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160 | struct rtems_termios_tty *tty); |
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161 | /* |
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162 | * global hooks for line disciplines |
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163 | */ |
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164 | extern struct linesw linesw[]; |
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165 | extern int nlinesw; |
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166 | |
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167 | #define TTYDISC 0 /* termios tty line discipline */ |
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168 | #define TABLDISC 3 /* tablet discipline */ |
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169 | #define SLIPDISC 4 /* serial IP discipline */ |
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170 | #define PPPDISC 5 /* PPP discipline */ |
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171 | #define MAXLDISC 8 |
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172 | |
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173 | #ifdef __cplusplus |
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174 | } |
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175 | #endif |
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176 | |
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177 | #endif /* TERMIOSTYPES_H */ |
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