1 | /* |
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2 | ///////////////////////////////////////////////////////////////////////////// |
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3 | // $Header$ |
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4 | // |
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5 | // Copyright (c) 2000 - Rosimildo da Silva |
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6 | // |
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7 | // MODULE DESCRIPTION: |
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8 | // This module implements the input devices interface used by MicroWindows |
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9 | // in an embedded system environment. |
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10 | // It uses the RTEMS message queue as the repository for the messages posted |
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11 | // by the devices registered. |
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12 | // |
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13 | // MODIFICATION/HISTORY: |
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14 | // |
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15 | // $Log$ |
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16 | // Revision 1.4 2002/01/04 18:32:48 joel |
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17 | // 2002-01-04 Ralf Corsepius <corsepiu@faw.uni-ulm.de> |
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18 | // |
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19 | // * mw-fb/mw_uid.c: Apply rtems_set_errno_and_return_minus_one. |
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20 | // |
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21 | // Revision 1.3 2000/11/30 14:36:46 joel |
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22 | // 2000-11-30 Joel Sherrill <joel@OARcorp.com> |
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23 | // |
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24 | // * mw-fb/mw_uid.c: Removed unnecessary dependency on <bsp.h>. |
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25 | // |
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26 | // Revision 1.2 2000/08/30 17:12:55 joel |
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27 | // 2000-08-30 Joel Sherrill <joel@OARcorp.com> |
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28 | // |
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29 | // * Many files: Moved posix/include/rtems/posix/seterr.h to |
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30 | // score/include/rtems/seterr.h so it would be available within |
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31 | // all APIs. |
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32 | // |
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33 | // Revision 1.1 2000/08/30 08:21:24 joel |
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34 | // 2000-08-26 Rosimildo da Silva <rdasilva@connecttel.com> |
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35 | // |
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36 | // * Added generic Micro FrameBuffer interface for MicroWindows. |
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37 | // This interface allows MicroWindows to under RTEMS. A sample |
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38 | // driver has been developed for the pc386 BSP. See |
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39 | // pc386/fb_vga.c as a sample. |
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40 | // * Added Uniform Input Device interface for MicroWindows. |
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41 | // See PC386 bsp for sample drivers for mouse and keyboard (console). |
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42 | // * mw-bf: New directory. |
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43 | // * Makefile.am, configure.in, wrapup/Makefile.am: Account for mw-fb. |
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44 | // * mw-fb/Makefile.am: New file. |
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45 | // * mw-fb/mw_fb.c: New file. |
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46 | // * mw-fb/mw_fb.h: New file. |
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47 | // * mw-fb/mw_uid.c: New file. |
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48 | // * mw-fb/mw_uid.h: New file. |
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49 | // |
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50 | // |
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51 | ///////////////////////////////////////////////////////////////////////////// |
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52 | */ |
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53 | |
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54 | #ifdef HAVE_CONFIG_H |
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55 | #include "config.h" |
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56 | #endif |
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57 | |
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58 | #include <stdio.h> |
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59 | #include <fcntl.h> |
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60 | #include <sys/ioctl.h> |
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61 | #include <errno.h> |
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62 | #include <rtems.h> |
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63 | |
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64 | #include <rtems/mw_uid.h> |
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65 | #include <rtems/seterr.h> |
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66 | |
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67 | static rtems_id queue_id = 0; |
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68 | static int open_count = 0; |
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69 | |
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70 | /* |
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71 | #define MW_DEBUG_ON 1 |
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72 | */ |
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73 | |
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74 | /* open a message queue with the kernel */ |
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75 | int uid_open_queue( const char *q_name, int flags, size_t max_msgs ) |
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76 | { |
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77 | static rtems_name queue_name; |
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78 | |
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79 | /* |
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80 | * For the first device calling this function we would create the queue. |
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81 | * It is assumed that this call is done at initialization, and no concerns |
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82 | * regarding multi-threading is taken in consideration here. |
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83 | */ |
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84 | if( !open_count ) |
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85 | { |
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86 | rtems_status_code status; |
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87 | queue_name = rtems_build_name( q_name[0], |
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88 | q_name[1], |
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89 | q_name[2], |
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90 | q_name[3] ); |
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91 | status = rtems_message_queue_create( queue_name, |
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92 | max_msgs, |
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93 | sizeof( struct MW_UID_MESSAGE ), |
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94 | RTEMS_FIFO | RTEMS_LOCAL, |
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95 | &queue_id ); |
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96 | if( status != RTEMS_SUCCESSFUL ) |
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97 | { |
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98 | #ifdef MW_DEBUG_ON |
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99 | printk( "UID_Queue: error creating queue: %d\n", status ); |
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100 | #endif |
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101 | return -1; |
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102 | } |
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103 | #ifdef MW_DEBUG_ON |
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104 | printk( "UID_Queue: id=%X\n", queue_id ); |
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105 | #endif |
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106 | } |
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107 | open_count++; |
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108 | return 0; |
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109 | } |
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110 | |
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111 | |
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112 | /* close message queue */ |
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113 | int uid_close_queue( void ) |
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114 | { |
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115 | if( open_count == 1 ) |
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116 | { |
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117 | rtems_message_queue_delete( queue_id ); |
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118 | queue_id = 0; |
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119 | } |
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120 | open_count--; |
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121 | return 0; |
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122 | } |
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123 | |
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124 | /* reads for a message from the device */ |
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125 | int uid_read_message( struct MW_UID_MESSAGE *m, unsigned long timeout ) |
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126 | { |
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127 | rtems_status_code status; |
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128 | rtems_unsigned32 size = 0; |
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129 | unsigned long micro_secs = timeout*1000; |
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130 | int wait = ( timeout != 0 ); |
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131 | |
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132 | status = rtems_message_queue_receive( queue_id, |
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133 | (void*)m, |
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134 | &size, |
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135 | wait ? RTEMS_WAIT : RTEMS_NO_WAIT, |
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136 | TOD_MICROSECONDS_TO_TICKS(micro_secs ) ); |
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137 | |
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138 | if( status == RTEMS_SUCCESSFUL ) |
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139 | { |
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140 | return size; |
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141 | } |
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142 | else if( ( status == RTEMS_UNSATISFIED ) || ( status == RTEMS_TIMEOUT ) ) |
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143 | { |
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144 | /* this macro returns -1 */ |
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145 | rtems_set_errno_and_return_minus_one( ETIMEDOUT ); |
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146 | } |
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147 | /* Here we have one error condition */ |
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148 | #ifdef MW_DEBUG_ON |
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149 | printk( "UID_Queue: error reading queue: %d\n", status ); |
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150 | #endif |
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151 | return -1; |
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152 | } |
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153 | |
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154 | |
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155 | /* |
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156 | * add a message to the queue of events. This method cna be used to |
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157 | * simulate hardware events, and it can be very handy during development |
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158 | * a new interface. |
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159 | */ |
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160 | int uid_send_message( struct MW_UID_MESSAGE *m ) |
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161 | { |
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162 | rtems_status_code status; |
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163 | status = rtems_message_queue_send( queue_id, ( void * )m, |
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164 | sizeof( struct MW_UID_MESSAGE ) ); |
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165 | return status == RTEMS_SUCCESSFUL ? 0 : -1; |
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166 | } |
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167 | |
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168 | /* |
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169 | * register the device to insert events to the message |
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170 | * queue named as the value passed in q_name |
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171 | */ |
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172 | int uid_register_device( int fd, const char *q_name ) |
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173 | { |
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174 | return ioctl( fd, MW_UID_REGISTER_DEVICE, q_name ); |
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175 | } |
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176 | |
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177 | /* tell this device to stop adding events to the queue */ |
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178 | int uid_unregister_device( int fd ) |
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179 | { |
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180 | return ioctl( fd, MW_UID_UNREGISTER_DEVICE, NULL ); |
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181 | } |
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182 | |
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183 | /* set the keyboard */ |
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184 | int uid_set_kbd_mode( int fd, int mode, int *old_mode ) |
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185 | { |
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186 | if (ioctl( fd, MV_KDGKBMODE, old_mode) < 0) |
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187 | { |
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188 | return -1; |
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189 | } |
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190 | if (ioctl(fd, MV_KDSKBMODE, mode ) < 0 ) |
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191 | { |
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192 | return -1; |
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193 | } |
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194 | return 0; |
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195 | } |
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