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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. #include <sys/mman.h>
  43.  
  44. #define CONSOLE_COUNT 12
  45. #define MAX_KEYREQUESTS_BUFFERED 32
  46.  
  47. #define NAME "CONSOLE"
  48.  
  49. int active_console = 0;
  50.  
  51. struct {
  52.     int phone;      /**< Framebuffer phone */
  53.     ipcarg_t rows;      /**< Framebuffer rows */
  54.     ipcarg_t cols;      /**< Framebuffer columns */
  55. } fb_info;
  56.  
  57. typedef struct {
  58.     keybuffer_t keybuffer;
  59.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t , MAX_KEYREQUESTS_BUFFERED);
  60.     int keyrequest_counter;
  61.     int client_phone;
  62.     int used;
  63.     screenbuffer_t screenbuffer;
  64. } connection_t;
  65.  
  66.  
  67.  
  68. connection_t connections[CONSOLE_COUNT];
  69. keyfield_t *interbuffer = NULL;
  70.    
  71. static int find_free_connection()
  72. {
  73.     int i = 0;
  74.    
  75.     while (i < CONSOLE_COUNT) {
  76.         if (connections[i].used == 0)
  77.             return i;
  78.         ++i;
  79.     }
  80.     return CONSOLE_COUNT;
  81. }
  82.  
  83.  
  84. static int find_connection(int client_phone)
  85. {
  86.     int i = 0;
  87.    
  88.     while (i < CONSOLE_COUNT) {
  89.         if (connections[i].client_phone == client_phone)
  90.             return i;
  91.         ++i;
  92.     }
  93.     return  CONSOLE_COUNT;
  94. }
  95.  
  96. /** Check key and process special keys.
  97.  *
  98.  * */
  99. static void write_char(int console, char key)
  100. {
  101.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  102.    
  103.     switch (key) {
  104.         case '\n':
  105.             scr->position_y += 1;
  106.             scr->position_x =  0;
  107.             break;
  108.         case '\r':
  109.             break;
  110.         case '\t':
  111.             scr->position_x += 8;
  112.             scr->position_x -= scr->position_x % 8;
  113.             break;
  114.         case '\b':
  115.             if (scr->position_x == 0)
  116.                 break;
  117.  
  118.             scr->position_x--;
  119.  
  120.             if (console == active_console) {
  121.                 ipc_call_async_3(fb_info.phone, FB_PUTCHAR, ' ', scr->position_y, scr->position_x, NULL, NULL);
  122.             }
  123.    
  124.             screenbuffer_putchar(scr, ' ');
  125.            
  126.             break;
  127.         default:   
  128.             if (console == active_console) {
  129.                 ipc_call_async_3(fb_info.phone, FB_PUTCHAR, key, scr->position_y, scr->position_x, NULL, NULL);
  130.             }
  131.    
  132.             screenbuffer_putchar(scr, key);
  133.             scr->position_x++;
  134.     }
  135.    
  136.     scr->position_y += (scr->position_x >= scr->size_x);
  137.    
  138.     if (scr->position_y >= scr->size_y) {
  139.         scr->position_y = scr->size_y - 1;
  140.         screenbuffer_clear_line(scr, scr->top_line++);
  141.         ipc_call_async(fb_info.phone, FB_SCROLL, 1, NULL, NULL);
  142.     }
  143.    
  144.     scr->position_x = scr->position_x % scr->size_x;
  145.    
  146.     if (console == active_console) 
  147.         ipc_call_async_2(fb_info.phone, FB_CURSOR_GOTO, scr->position_y, scr->position_x, NULL, NULL);
  148.    
  149. }
  150.  
  151.  
  152. /* Handler for keyboard */
  153. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  154. {
  155.     ipc_callid_t callid;
  156.     ipc_call_t call;
  157.     int retval;
  158.     int i, j;
  159.     char c,d;
  160.     connection_t *conn;
  161.    
  162.     /* Ignore parameters, the connection is alread opened */
  163.     while (1) {
  164.         callid = async_get_call(&call);
  165.         switch (IPC_GET_METHOD(call)) {
  166.         case IPC_M_PHONE_HUNGUP:
  167.             ipc_answer_fast(callid,0,0,0);
  168.             /* TODO: Handle hangup */
  169.             return;
  170.         case KBD_PUSHCHAR:
  171.             /* got key from keyboard driver */
  172.            
  173.             retval = 0;
  174.             c = IPC_GET_ARG1(call);
  175.             /* switch to another virtual console */
  176.            
  177.             conn = &connections[active_console];
  178. //          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
  179.             if ((c >= '1') && (c < '1' + CONSOLE_COUNT)) {
  180.                 /*FIXME: draw another console content from buffer */
  181.                 if (c - '1' == active_console)
  182.                         break;
  183.                 active_console = c - '1';
  184.                 conn = &connections[active_console];
  185.  
  186.                 ipc_call_async(fb_info.phone, FB_CURSOR_VISIBILITY, 0, NULL, NULL);
  187.        
  188.                 if (interbuffer) {
  189.                     for (i = 0; i < fb_info.cols * fb_info.rows; i++)
  190.                         interbuffer[i] = conn->screenbuffer.buffer[i]; 
  191.                     ipc_call_sync(fb_info.phone, FB_DRAW_TEXT_DATA, 0, NULL);      
  192.                 } else {
  193.  
  194.                     ipc_call_async_2(fb_info.phone, FB_CLEAR, 0, 0, NULL, NULL);
  195.                
  196.                    
  197.                     for (i = 0; i < conn->screenbuffer.size_x; i++)
  198.                         for (j = 0; j < conn->screenbuffer.size_y; j++) {
  199.                             d = get_field_at(&(conn->screenbuffer),i, j)->character;
  200.                             if (d && d != ' ')
  201.                                 ipc_call_async_3(fb_info.phone, FB_PUTCHAR, d, j, i, NULL, NULL);
  202.                         }
  203.  
  204.                     ipc_call_async_2(fb_info.phone, FB_CURSOR_GOTO, conn->screenbuffer.position_y, conn->screenbuffer.position_x, NULL, NULL);
  205.                 }
  206.                 ipc_call_async(fb_info.phone, FB_CURSOR_VISIBILITY, 1, NULL, NULL);
  207.  
  208.                 break;
  209.             }
  210.            
  211.             /* if client is awaiting key, send it */
  212.             if (conn->keyrequest_counter > 0) {    
  213.                 conn->keyrequest_counter--;
  214.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
  215.                 break;
  216.             }
  217.            
  218.             /*FIXME: else store key to its buffer */
  219.             keybuffer_push(&conn->keybuffer, c);
  220.            
  221.             break;
  222.         default:
  223.             retval = ENOENT;
  224.         }      
  225.         ipc_answer_fast(callid, retval, 0, 0);
  226.     }
  227. }
  228.  
  229. /** Default thread for new connections */
  230. void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  231. {
  232.     ipc_callid_t callid;
  233.     ipc_call_t call;
  234.     int consnum;
  235.     ipcarg_t arg1;
  236.  
  237.     if ((consnum = find_free_connection()) == CONSOLE_COUNT) {
  238.         ipc_answer_fast(iid,ELIMIT,0,0);
  239.         return;
  240.     }
  241.  
  242.     connections[consnum].used = 1;
  243.     connections[consnum].client_phone = IPC_GET_ARG3(call);
  244.     screenbuffer_clear(&(connections[consnum].screenbuffer));
  245.    
  246.     /* Accept the connection */
  247.     ipc_answer_fast(iid,0,0,0);
  248.    
  249.     while (1) {
  250.         callid = async_get_call(&call);
  251.         switch (IPC_GET_METHOD(call)) {
  252.         case IPC_M_PHONE_HUNGUP:
  253.             /* TODO */
  254.             ipc_answer_fast(callid, 0,0,0);
  255.             return;
  256.         case CONSOLE_PUTCHAR:
  257.             write_char(consnum, IPC_GET_ARG1(call));
  258.             break;
  259.         case CONSOLE_CLEAR:
  260.             /* Send message to fb */
  261.             if (consnum == active_console) {
  262.                 ipc_call_async_2(fb_info.phone, FB_CLEAR, 0, 0, NULL, NULL);
  263.             }
  264.            
  265.             screenbuffer_clear(&(connections[consnum].screenbuffer));
  266.            
  267.             break;
  268.         case CONSOLE_GOTO:
  269.            
  270.             screenbuffer_goto(&(connections[consnum].screenbuffer), IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  271.            
  272.             break;
  273.  
  274.         case CONSOLE_GETCHAR:
  275.             if (keybuffer_empty(&(connections[consnum].keybuffer))) {
  276.                 /* buffer is empty -> store request */
  277.                 if (connections[consnum].keyrequest_counter < MAX_KEYREQUESTS_BUFFERED) {      
  278.                     fifo_push(connections[consnum].keyrequests, callid);
  279.                     connections[consnum].keyrequest_counter++;
  280.                 } else {
  281.                     /* no key available and too many requests => fail */
  282.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  283.                 }
  284.                 continue;
  285.             };
  286.             keybuffer_pop(&(connections[consnum].keybuffer), (char *)&arg1);
  287.            
  288.             break;
  289.         }
  290.         ipc_answer_fast(callid, 0, arg1, 0);
  291.     }
  292. }
  293.  
  294. int main(int argc, char *argv[])
  295. {
  296.     ipcarg_t phonehash;
  297.     int kbd_phone, fb_phone;
  298.     ipcarg_t retval, arg1 = 0xdead, arg2 = 0xbeef;
  299.     int i;
  300.  
  301.     async_set_client_connection(client_connection);
  302.    
  303.     /* Connect to keyboard driver */
  304.  
  305.     while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
  306.         usleep(10000);
  307.     };
  308.    
  309.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  310.         return -1;
  311.     };
  312.  
  313.     /* Connect to framebuffer driver */
  314.    
  315.     while ((fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
  316.         usleep(10000);
  317.     }
  318.    
  319.     ipc_call_sync_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows), &(fb_info.cols));
  320.     ipc_call_async_2(fb_info.phone, FB_SET_STYLE, DEFAULT_FOREGROUND_COLOR, DEFAULT_BACKGROUND_COLOR, NULL, NULL);
  321.     ipc_call_sync(fb_info.phone, FB_CURSOR_VISIBILITY, 1, NULL);
  322.    
  323.     /* Init virtual consoles */
  324.     for (i = 0; i < CONSOLE_COUNT; i++) {
  325.         connections[i].used = 0;
  326.         keybuffer_init(&(connections[i].keybuffer));
  327.        
  328.         connections[i].keyrequests.head = connections[i].keyrequests.tail = 0;
  329.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  330.         connections[i].keyrequest_counter = 0;
  331.        
  332.         if (screenbuffer_init(&(connections[i].screenbuffer), fb_info.cols, fb_info.rows ) == NULL) {
  333.             /*FIXME: handle error */
  334.             return -1;
  335.         }
  336.     }
  337.    
  338.     if ((interbuffer = mmap(NULL, sizeof(keyfield_t) * fb_info.cols * fb_info.rows , PROTO_READ|PROTO_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, 0 ,0 )) != NULL) {
  339.         if (ipc_call_sync_3(fb_info.phone, IPC_M_AS_AREA_SEND, (ipcarg_t)interbuffer, 0, AS_AREA_READ | AS_AREA_CACHEABLE, NULL, NULL, NULL) != 0) {
  340. //          ipc_call_async_3(fb_info.phone, FB_PUTCHAR, '?', 10, 10, NULL, NULL);
  341.             munmap(interbuffer, sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  342.             interbuffer = NULL;
  343.         }
  344. /*  } else {
  345.         ipc_call_async_3(fb_info.phone, FB_PUTCHAR, '!', 10, 10, NULL, NULL);
  346. */
  347.     }
  348.    
  349.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  350.    
  351.     ipc_call_async_2(fb_info.phone, FB_CURSOR_GOTO, 0, 0, NULL, NULL);
  352.  
  353.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  354.         return -1;
  355.     };
  356.    
  357.     async_manager();
  358.  
  359.     return 0;  
  360. }
  361.