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  1. /*
  2.  * Copyright (C) 2006 Josef Cejka
  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 <ipc.h>
  30. #include <services.h>
  31. #include <stdio.h>
  32. #include <unistd.h>
  33. #include <stdlib.h>
  34. #include <ns.h>
  35. #include <errno.h>
  36. #include <arch/kbd.h>
  37. #include <kbd.h>
  38. #include <key_buffer.h>
  39. #include <fifo.h>
  40.  
  41. #define NAME "KBD"
  42.  
  43. #define KBD_REQUEST_MAX 32 /**< Maximum requests buffered until keypress */
  44.  
  45. int main(int argc, char **argv)
  46. {
  47.     ipc_call_t call;
  48.     ipc_callid_t callid;
  49.     char connected = 0;
  50.     int res;
  51.     int c;
  52.     ipcarg_t phonead;
  53.    
  54.     ipcarg_t retval, arg1, arg2;
  55.    
  56.     fifo_count_t callers_counter = 0;
  57.    
  58.     FIFO_INITIALIZE_STATIC(callers_buffer, ipc_callid_t, KBD_REQUEST_MAX);
  59.  
  60.     printf("Uspace kbd service started.\n");
  61.  
  62.     /* Initialize arch dependent parts */
  63.     if (!(res = kbd_arch_init())) {
  64.             printf("Kbd registration failed with retval %d.\n", res);
  65.             return -1;
  66.             };
  67.    
  68.     /* Initialize key buffer */
  69.     key_buffer_init();
  70.    
  71.     /* Register service at nameserver */
  72.     printf("%s: Registering at naming service.\n", NAME);
  73.  
  74.     if ((res = ipc_connect_to_me(PHONE_NS, SERVICE_KEYBOARD, 0, &phonead)) != 0) {
  75.         printf("%s: Error: Registering at naming service failed.\n", NAME);
  76.         return -1;
  77.     };
  78.    
  79.     while (1) {
  80.         callid = ipc_wait_for_call(&call, 0);
  81.     //  printf("%s:Call phone=%lX..", NAME, call.in_phone_hash);
  82.         switch (IPC_GET_METHOD(call)) {
  83.         case IPC_M_PHONE_HUNGUP:
  84.             if (connected) {
  85.                 if (--connected == 0) {
  86.                     callers_counter = 0;
  87.                     callers_buffer.head = callers_buffer.tail = 0;
  88.                     key_buffer_free(); 
  89.                 }
  90.             }
  91.            
  92.             printf("%s: Phone hung up.\n", NAME);
  93.             retval = 0;
  94.             break;
  95.         case IPC_M_CONNECT_TO_ME:
  96.             printf("%s: Somebody connecting phid=%zd.\n", NAME, IPC_GET_ARG3(call));
  97.             retval = 0;
  98.             break;
  99.         case IPC_M_CONNECT_ME_TO:
  100.         //  printf("%s: Connect me (%P) to: %zd\n",NAME, IPC_GET_ARG3(call), IPC_GET_ARG1(call));
  101.             if (connected) {
  102.                 retval = ELIMIT;
  103.             } else {
  104.                 retval = 0;
  105.                 connected = 1;
  106.             }
  107.             break;
  108.         case IPC_M_INTERRUPT:
  109.             if (connected) {
  110.                 kbd_arch_process(IPC_GET_ARG2(call));
  111.             }
  112.             //printf("%s: GOT INTERRUPT: %c\n", NAME, IPC_GET_ARG2(call));
  113.             if (!callers_counter)
  114.                 break;
  115.             /* Small trick - interrupt does not need answer so we can change callid to caller awaiting key */
  116.             callers_counter--;
  117.             callid = fifo_pop(callers_buffer);
  118.         case KBD_GETCHAR:
  119. //          printf("%s: Getchar: ", NAME);
  120.             retval = 0;
  121.             arg1 = 0;  
  122.             if (!key_buffer_pop((char *)&arg1)) {
  123.                 if (callers_counter < KBD_REQUEST_MAX) {
  124.                     callers_counter++;
  125.                     fifo_push(callers_buffer, callid);
  126.                 } else {
  127.                     retval = ELIMIT;
  128.                 }
  129.                 continue;
  130.             };
  131.             arg2 = 0xbeef;
  132.         //  printf("GetChar return %c\n", arg1);
  133.            
  134.             break;
  135.         default:
  136.             printf("%s: Unknown method: %zd\n", NAME, IPC_GET_METHOD(call));
  137.             retval = ENOENT;
  138.             break;
  139.         }
  140.         if (! (callid & IPC_CALLID_NOTIFICATION)) {
  141.         //  printf("%s: Answering\n", NAME);
  142.             ipc_answer_fast(callid, retval, arg1, arg2);
  143.         }
  144.     }
  145. }
  146.