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  1. /*
  2.  * Copyright (C) 2006 Ondrej Palkovsky
  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. #include <async.h>
  30. #include <ipc/fb.h>
  31. #include <ipc/ipc.h>
  32. #include <libc.h>
  33. #include <errno.h>
  34.  
  35. #include "sysio.h"
  36.  
  37. /* Allow only 1 connection */
  38. static int client_connected = 0;
  39.  
  40. static void sysput(char c)
  41. {
  42.     __SYSCALL3(SYS_IO, 1, (sysarg_t)&c, (sysarg_t) 1);
  43. }
  44.  
  45. static void sysio_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  46. {
  47.     int retval;
  48.     ipc_callid_t callid;
  49.     ipc_call_t call;
  50.     char c;
  51.  
  52.     if (client_connected) {
  53.         ipc_answer_fast(iid, ELIMIT, 0,0);
  54.         return;
  55.     }
  56.     client_connected = 1;
  57.     ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
  58.     while (1) {
  59.         callid = async_get_call(&call);
  60.         switch (IPC_GET_METHOD(call)) {
  61.         case IPC_M_PHONE_HUNGUP:
  62.             client_connected = 0;
  63.             ipc_answer_fast(callid,0,0,0);
  64.             return; /* Exit thread */
  65.         case FB_PUTCHAR:
  66.             c = IPC_GET_ARG1(call);
  67.             sysput(c);
  68.             retval = 0;
  69.             break;
  70.         case FB_GET_CSIZE:
  71.             ipc_answer_fast(callid, 0, 25, 80);
  72.             continue;
  73.         default:
  74.             retval = ENOENT;
  75.         }
  76.         ipc_answer_fast(callid,retval,0,0);
  77.     }
  78. }
  79.  
  80. void sysio_init(void)
  81. {
  82.     async_set_client_connection(sysio_client_connection);
  83. }
  84.