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  1. /*
  2.  * Copyright (c) 2009 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup genarch
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief Serial line processing.
  35.  */
  36.  
  37. #include <genarch/srln/srln.h>
  38. #include <console/chardev.h>
  39. #include <console/console.h>
  40. #include <proc/thread.h>
  41. #include <arch.h>
  42. #include <string.h>
  43.  
  44. static indev_t srlnout;
  45.  
  46. indev_operations_t srlnout_ops = {
  47.     .poll = NULL
  48. };
  49.  
  50. static void ksrln(void *arg)
  51. {
  52.     indev_t *in = (indev_t *) arg;
  53.     bool cr = false;
  54.     uint32_t escape = 0;
  55.    
  56.     while (true) {
  57.         wchar_t ch = _getc(in);
  58.        
  59.         /* ANSI escape sequence processing */
  60.         if (escape != 0) {
  61.             escape <<= 8;
  62.             escape |= ch & 0xff;
  63.            
  64.             if ((escape == 0x1b4f) || (escape == 0x1b5b) || (escape == 0x1b5b33))
  65.                 continue;
  66.            
  67.             switch (escape) {
  68.             case 0x1b4f46:
  69.             case 0x1b5b46:
  70.                 ch = U_END_ARROW;
  71.                 escape = 0;
  72.                 break;
  73.             case 0x1b4f48:
  74.             case 0x1b5b48:
  75.                 ch = U_HOME_ARROW;
  76.                 escape = 0;
  77.                 break;
  78.             case 0x1b5b41:
  79.                 ch = U_UP_ARROW;
  80.                 escape = 0;
  81.                 break;
  82.             case 0x1b5b42:
  83.                 ch = U_DOWN_ARROW;
  84.                 escape = 0;
  85.                 break;
  86.             case 0x1b5b43:
  87.                 ch = U_RIGHT_ARROW;
  88.                 escape = 0;
  89.                 break;
  90.             case 0x1b5b44:
  91.                 ch = U_LEFT_ARROW;
  92.                 escape = 0;
  93.                 break;
  94.             case 0x1b5b337e:
  95.                 ch = U_DELETE;
  96.                 escape = 0;
  97.                 break;
  98.             default:
  99.                 escape = 0;
  100.             }
  101.         }
  102.        
  103.         if (ch == 0x1b) {
  104.             escape = ch & 0xff;
  105.             continue;
  106.         }
  107.        
  108.         /* Replace carriage return with line feed
  109.            and suppress any following line feed */
  110.         if ((ch == '\n') && (cr)) {
  111.             cr = false;
  112.             continue;
  113.         }
  114.        
  115.         if (ch == '\r') {
  116.             ch = '\n';
  117.             cr = true;
  118.         } else
  119.             cr = false;
  120.        
  121.         /* Backspace */
  122.         if (ch == 0x7f)
  123.             ch = '\b';
  124.        
  125.         indev_push_character(stdin, ch);
  126.     }
  127. }
  128.  
  129. void srln_init(indev_t *devin)
  130. {
  131.     indev_initialize("srln", &srlnout, &srlnout_ops);
  132.     thread_t *thread
  133.         = thread_create(ksrln, devin, TASK, 0, "ksrln", false);
  134.    
  135.     if (thread) {
  136.         stdin = &srlnout;
  137.         thread_ready(thread);
  138.     }
  139. }
  140.  
  141. /** @}
  142.  */
  143.