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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.  
  30. #include <kbd.h>
  31. #include <fb.h>
  32. #include <ipc/ipc.h>
  33. #include <ipc/fb.h>
  34. #include <ipc/services.h>
  35. #include <errno.h>
  36. #include <key_buffer.h>
  37. #include <console.h>
  38. #include <unistd.h>
  39. #include <async.h>
  40. #include <libadt/fifo.h>
  41. #include <screenbuffer.h>
  42.  
  43. #define CONSOLE_COUNT 12
  44. #define MAX_KEYREQUESTS_BUFFERED 32
  45.  
  46. #define NAME "CONSOLE"
  47.  
  48. int active_console = 1;
  49.  
  50. struct {
  51.     int phone;      /**< Framebuffer phone */
  52.     int rows;       /**< Framebuffer rows */
  53.     int cols;       /**< Framebuffer columns */
  54. } fb_info;
  55.  
  56. typedef struct {
  57.     keybuffer_t keybuffer;
  58.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t , MAX_KEYREQUESTS_BUFFERED);
  59.     int keyrequest_counter;
  60.     int client_phone;
  61.     int used;
  62.     screenbuffer_t screenbuffer;
  63. } connection_t;
  64.  
  65. connection_t connections[CONSOLE_COUNT];
  66.  
  67. static int find_free_connection()
  68. {
  69.     int i = 0;
  70.    
  71.     while (i < CONSOLE_COUNT) {
  72.         if (connections[i].used == 0)
  73.             return i;
  74.         ++i;
  75.     }
  76.     return CONSOLE_COUNT;
  77. }
  78.  
  79.  
  80. static int find_connection(int client_phone)
  81. {
  82.     int i = 0;
  83.    
  84.     while (i < CONSOLE_COUNT) {
  85.         if (connections[i].client_phone == client_phone)
  86.             return i;
  87.         ++i;
  88.     }
  89.     return  CONSOLE_COUNT;
  90. }
  91.  
  92. /** Check key and process special keys.
  93.  *
  94.  * */
  95. static void write_char(int console, char key)
  96. {
  97.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  98.    
  99.     switch (key) {
  100.         case '\n':
  101.             scr->position_y += 1;
  102.             scr->position_x =  0;
  103.             break;
  104.         case '\r':
  105.             break;
  106.         case '\t':
  107.             scr->position_x += 8;
  108.             scr->position_x -= scr->position_x % 8;
  109.             break;
  110.         case '\b':
  111.             if (scr->position_x == 0)
  112.                 break;
  113.  
  114.             scr->position_x--;
  115.  
  116.             if (console == active_console) {
  117.                 ipc_call_async_3(fb_info.phone, FB_PUTCHAR, ' ', scr->position_y, scr->position_x, NULL, NULL);
  118.             }
  119.    
  120.             screenbuffer_putchar(scr, ' ');
  121.            
  122.             break;
  123.         default:   
  124.             if (console == active_console) {
  125.                 ipc_call_async_3(fb_info.phone, FB_PUTCHAR, key, scr->position_y, scr->position_x, NULL, NULL);
  126.             }
  127.    
  128.             screenbuffer_putchar(scr, key);
  129.             scr->position_x++;
  130.     }
  131.    
  132.     scr->position_y += (scr->position_x >= scr->size_x);
  133.    
  134.     if (scr->position_y >= scr->size_y) {
  135.         scr->position_y = scr->size_y - 1;
  136.         screenbuffer_clear_line(scr, scr->top_line++);
  137.         ipc_call_async(fb_info.phone, FB_SCROLL, 1, NULL, NULL);
  138.     }
  139.    
  140.     scr->position_x = scr->position_x % scr->size_x;
  141.    
  142.     if (console == active_console) 
  143.         ipc_call_async_2(fb_info.phone, FB_CURSOR_GOTO, scr->position_y, scr->position_x, NULL, NULL);
  144.    
  145. }
  146.  
  147.  
  148. /* Handler for keyboard */
  149. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  150. {
  151.     ipc_callid_t callid;
  152.     ipc_call_t call;
  153.     int retval;
  154.     int i, j;
  155.     char c,d;
  156.     connection_t *conn;
  157.  
  158.     /* Ignore parameters, the connection is alread opened */
  159.     while (1) {
  160.         callid = async_get_call(&call);
  161.         switch (IPC_GET_METHOD(call)) {
  162.         case IPC_M_PHONE_HUNGUP:
  163.             ipc_answer_fast(callid,0,0,0);
  164.             /* TODO: Handle hangup */
  165.             return;
  166.         case KBD_PUSHCHAR:
  167.             /* got key from keyboard driver */
  168.            
  169.             retval = 0;
  170.             c = IPC_GET_ARG1(call);
  171.             /* switch to another virtual console */
  172.            
  173.             conn = &connections[active_console];
  174. //          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
  175.             if ((c >= '1') && (c < '1' + CONSOLE_COUNT)) {
  176.                 /*FIXME: draw another console content from buffer */
  177.                 if (c - '1' == active_console)
  178.                         break;
  179.                 active_console = c - '1';
  180.                 conn = &connections[active_console];
  181.  
  182.                 ipc_call_async(fb_info.phone, FB_CURSOR_VISIBILITY, 0, NULL, NULL);
  183.                 ipc_call_async_2(fb_info.phone, FB_CLEAR, 0, 0, NULL, NULL);
  184.                
  185.                 for (i = 0; i < conn->screenbuffer.size_x; i++)
  186.                     for (j = 0; j < conn->screenbuffer.size_y; j++) {
  187.                         d = get_field_at(&(conn->screenbuffer),i, j)->character;
  188.                         if (d && d != ' ')
  189.                             ipc_call_async_3(fb_info.phone, FB_PUTCHAR, d, j, i, NULL, NULL);
  190.                     }
  191.  
  192.                 ipc_call_async_2(fb_info.phone, FB_CURSOR_GOTO, conn->screenbuffer.position_y, conn->screenbuffer.position_x, NULL, NULL);
  193.                 ipc_call_async(fb_info.phone, FB_CURSOR_VISIBILITY, 1, NULL, NULL);
  194.  
  195.                 break;
  196.             }
  197.            
  198.             /* if client is awaiting key, send it */
  199.             if (conn->keyrequest_counter > 0) {    
  200.                 conn->keyrequest_counter--;
  201.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
  202.                 break;
  203.             }
  204.            
  205.             /*FIXME: else store key to its buffer */
  206.             keybuffer_push(&conn->keybuffer, c);
  207.            
  208.             break;
  209.         default:
  210.             retval = ENOENT;
  211.         }      
  212.         ipc_answer_fast(callid, retval, 0, 0);
  213.     }
  214. }
  215.  
  216. /** Default thread for new connections */
  217. void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  218. {
  219.     ipc_callid_t callid;
  220.     ipc_call_t call;
  221.     int consnum;
  222.     ipcarg_t arg1;
  223.  
  224.     if ((consnum = find_free_connection()) == CONSOLE_COUNT) {
  225.         ipc_answer_fast(iid,ELIMIT,0,0);
  226.         return;
  227.     }
  228.  
  229.     connections[consnum].used = 1;
  230.     connections[consnum].client_phone = IPC_GET_ARG3(call);
  231.     screenbuffer_clear(&(connections[consnum].screenbuffer));
  232.    
  233.     /* Accept the connection */
  234.     ipc_answer_fast(iid,0,0,0);
  235.    
  236.     while (1) {
  237.         callid = async_get_call(&call);
  238.         switch (IPC_GET_METHOD(call)) {
  239.         case IPC_M_PHONE_HUNGUP:
  240.             /* TODO */
  241.             ipc_answer_fast(callid, 0,0,0);
  242.             return;
  243.         case CONSOLE_PUTCHAR:
  244.             write_char(consnum, IPC_GET_ARG1(call));
  245.             break;
  246.         case CONSOLE_CLEAR:
  247.             /* Send message to fb */
  248.             if (consnum == active_console) {
  249.                 ipc_call_async_2(fb_info.phone, FB_CLEAR, 0, 0, NULL, NULL);
  250.             }
  251.            
  252.             screenbuffer_clear(&(connections[consnum].screenbuffer));
  253.            
  254.             break;
  255.         case CONSOLE_GOTO:
  256.            
  257.             screenbuffer_goto(&(connections[consnum].screenbuffer), IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  258.            
  259.             break;
  260.  
  261.         case CONSOLE_GETCHAR:
  262.             if (keybuffer_empty(&(connections[consnum].keybuffer))) {
  263.                 /* buffer is empty -> store request */
  264.                 if (connections[consnum].keyrequest_counter < MAX_KEYREQUESTS_BUFFERED) {      
  265.                     fifo_push(connections[consnum].keyrequests, callid);
  266.                     connections[consnum].keyrequest_counter++;
  267.                 } else {
  268.                     /* no key available and too many requests => fail */
  269.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  270.                 }
  271.                 continue;
  272.             };
  273.             keybuffer_pop(&(connections[consnum].keybuffer), (char *)&arg1);
  274.            
  275.             break;
  276.         }
  277.         ipc_answer_fast(callid, 0, arg1, 0);
  278.     }
  279. }
  280.  
  281. int main(int argc, char *argv[])
  282. {
  283.     ipcarg_t phonehash;
  284.     int kbd_phone, fb_phone;
  285.     ipcarg_t retval, arg1 = 0xdead, arg2 = 0xbeef;
  286.     int i;
  287.  
  288.     async_set_client_connection(client_connection);
  289.    
  290.     /* Connect to keyboard driver */
  291.  
  292.     while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
  293.         usleep(10000);
  294.     };
  295.    
  296.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  297.         return -1;
  298.     };
  299.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  300.  
  301.     /* Connect to framebuffer driver */
  302.    
  303.     while ((fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
  304.         usleep(10000);
  305.     }
  306.    
  307.     ipc_call_sync_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows), &(fb_info.cols));
  308.     ipc_call_sync(fb_info.phone, FB_CURSOR_VISIBILITY, 1, NULL);
  309.    
  310.     /* Init virtual consoles */
  311.     for (i = 0; i < CONSOLE_COUNT; i++) {
  312.         connections[i].used = 0;
  313.         keybuffer_init(&(connections[i].keybuffer));
  314.        
  315.         connections[i].keyrequests.head = connections[i].keyrequests.tail = 0;
  316.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  317.         connections[i].keyrequest_counter = 0;
  318.        
  319.         if (screenbuffer_init(&(connections[i].screenbuffer), fb_info.cols, fb_info.rows ) == NULL) {
  320.             /*FIXME: handle error */
  321.             return -1;
  322.         }
  323.     }
  324.    
  325.     ipc_call_async_2(fb_info.phone, FB_CURSOR_GOTO, 0, 0, NULL, NULL);
  326.  
  327.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  328.         return -1;
  329.     };
  330.    
  331.     async_manager();
  332.  
  333.     return 0;  
  334. }
  335.