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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. #include "gcons.h"
  45.  
  46. #define MAX_KEYREQUESTS_BUFFERED 32
  47.  
  48. #define NAME "CONSOLE"
  49.  
  50. int active_console = 0;
  51.  
  52. struct {
  53.     int phone;      /**< Framebuffer phone */
  54.     ipcarg_t rows;      /**< Framebuffer rows */
  55.     ipcarg_t cols;      /**< Framebuffer columns */
  56. } fb_info;
  57.  
  58. typedef struct {
  59.     keybuffer_t keybuffer;
  60.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t , MAX_KEYREQUESTS_BUFFERED);
  61.     int keyrequest_counter;
  62.     int client_phone;
  63.     int used;
  64.     screenbuffer_t screenbuffer;
  65. } connection_t;
  66.  
  67.  
  68.  
  69. connection_t connections[CONSOLE_COUNT];
  70. keyfield_t *interbuffer = NULL;
  71.    
  72. static int find_free_connection()
  73. {
  74.     int i = 0;
  75.    
  76.     while (i < CONSOLE_COUNT) {
  77.         if (connections[i].used == 0)
  78.             return i;
  79.         ++i;
  80.     }
  81.     return CONSOLE_COUNT;
  82. }
  83.  
  84.  
  85. static int find_connection(int client_phone)
  86. {
  87.     int i = 0;
  88.    
  89.     while (i < CONSOLE_COUNT) {
  90.         if (connections[i].client_phone == client_phone)
  91.             return i;
  92.         ++i;
  93.     }
  94.     return  CONSOLE_COUNT;
  95. }
  96.  
  97. /** Check key and process special keys.
  98.  *
  99.  * */
  100. static void write_char(int console, char key)
  101. {
  102.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  103.    
  104.     switch (key) {
  105.         case '\n':
  106.             scr->position_y += 1;
  107.             scr->position_x =  0;
  108.             break;
  109.         case '\r':
  110.             break;
  111.         case '\t':
  112.             scr->position_x += 8;
  113.             scr->position_x -= scr->position_x % 8;
  114.             break;
  115.         case '\b':
  116.             if (scr->position_x == 0)
  117.                 break;
  118.  
  119.             scr->position_x--;
  120.  
  121.             if (console == active_console) {
  122.                 nsend_call_3(fb_info.phone, FB_PUTCHAR, ' ', scr->position_y, scr->position_x);
  123.             }
  124.    
  125.             screenbuffer_putchar(scr, ' ');
  126.            
  127.             break;
  128.         default:   
  129.             if (console == active_console) {
  130.                 nsend_call_3(fb_info.phone, FB_PUTCHAR, key, scr->position_y, scr->position_x);
  131.             }
  132.    
  133.             screenbuffer_putchar(scr, key);
  134.             scr->position_x++;
  135.     }
  136.    
  137.     scr->position_y += (scr->position_x >= scr->size_x);
  138.    
  139.     if (scr->position_y >= scr->size_y) {
  140.         scr->position_y = scr->size_y - 1;
  141.         screenbuffer_clear_line(scr, scr->top_line++);
  142.         if (console == active_console)
  143.             nsend_call(fb_info.phone, FB_SCROLL, 1);
  144.     }
  145.    
  146.     scr->position_x = scr->position_x % scr->size_x;
  147.    
  148.     if (console == active_console) 
  149.         send_call_2(fb_info.phone, FB_CURSOR_GOTO, scr->position_y, scr->position_x);
  150.    
  151. }
  152.  
  153.  
  154. /* Handler for keyboard */
  155. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  156. {
  157.     ipc_callid_t callid;
  158.     ipc_call_t call;
  159.     int retval;
  160.     int i, j;
  161.     char c,d;
  162.     connection_t *conn;
  163.    
  164.     /* Ignore parameters, the connection is alread opened */
  165.     while (1) {
  166.         callid = async_get_call(&call);
  167.         switch (IPC_GET_METHOD(call)) {
  168.         case IPC_M_PHONE_HUNGUP:
  169.             ipc_answer_fast(callid,0,0,0);
  170.             /* TODO: Handle hangup */
  171.             return;
  172.         case KBD_PUSHCHAR:
  173.             /* got key from keyboard driver */
  174.            
  175.             retval = 0;
  176.             c = IPC_GET_ARG1(call);
  177.             /* switch to another virtual console */
  178.            
  179.             conn = &connections[active_console];
  180. //          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
  181.             if ((c >= '0') && (c < '0' + CONSOLE_COUNT)) {
  182.                 if (c == '0') {
  183.                     /* switch to kernel console*/
  184.                     nsend_call(fb_info.phone, FB_CURSOR_VISIBILITY, 0);
  185.                     nsend_call_2(fb_info.phone, FB_SET_STYLE, DEFAULT_FOREGROUND_COLOR, DEFAULT_BACKGROUND_COLOR);
  186.                     nsend_call(fb_info.phone, FB_CLEAR, 0);
  187.                     /* FIXME: restore kernel console */
  188.                      __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  189.                      break;
  190.                      
  191.                 } else {
  192.                     c = c - '1';
  193.                     if (c == active_console)
  194.                         break;
  195.                     active_console = c;
  196.                     gcons_change_console(c);
  197.                
  198.                 }
  199.                
  200.                 conn = &connections[active_console];
  201.  
  202.                 nsend_call(fb_info.phone, FB_CURSOR_VISIBILITY, 0);
  203.        
  204.                 if (interbuffer) {
  205.                     for (i = 0; i < conn->screenbuffer.size_x; i++)
  206.                         for (j = 0; j < conn->screenbuffer.size_y; j++)
  207.                             interbuffer[i + j*conn->screenbuffer.size_x] = *get_field_at(&(conn->screenbuffer),i, j);
  208.                            
  209.                     sync_send_2(fb_info.phone, FB_DRAW_TEXT_DATA, 0, 0, NULL, NULL);       
  210.                 } else {
  211.                     nsend_call(fb_info.phone, FB_CLEAR, 0);
  212.                
  213.                    
  214.                     for (i = 0; i < conn->screenbuffer.size_x; i++)
  215.                         for (j = 0; j < conn->screenbuffer.size_y; j++) {
  216.                             d = get_field_at(&(conn->screenbuffer),i, j)->character;
  217.                             if (d && d != ' ')
  218.                                 nsend_call_3(fb_info.phone, FB_PUTCHAR, d, j, i);
  219.                         }
  220.  
  221.                 }
  222.                 nsend_call_2(fb_info.phone, FB_CURSOR_GOTO, conn->screenbuffer.position_y, conn->screenbuffer.position_x);
  223.                 nsend_call_2(fb_info.phone, FB_SET_STYLE, conn->screenbuffer.style.fg_color, \
  224.                         conn->screenbuffer.style.bg_color);
  225.                 send_call(fb_info.phone, FB_CURSOR_VISIBILITY, 1);
  226.  
  227.                 break;
  228.             }
  229.            
  230.             /* if client is awaiting key, send it */
  231.             if (conn->keyrequest_counter > 0) {    
  232.                 conn->keyrequest_counter--;
  233.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
  234.                 break;
  235.             }
  236.            
  237.             /*FIXME: else store key to its buffer */
  238.             keybuffer_push(&conn->keybuffer, c);
  239.            
  240.             break;
  241.         default:
  242.             retval = ENOENT;
  243.         }      
  244.         ipc_answer_fast(callid, retval, 0, 0);
  245.     }
  246. }
  247.  
  248. /** Default thread for new connections */
  249. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  250. {
  251.     ipc_callid_t callid;
  252.     ipc_call_t call;
  253.     int consnum;
  254.     ipcarg_t arg1, arg2;
  255.  
  256.     if ((consnum = find_free_connection()) == CONSOLE_COUNT) {
  257.         ipc_answer_fast(iid,ELIMIT,0,0);
  258.         return;
  259.     }
  260.  
  261.     connections[consnum].used = 1;
  262.     connections[consnum].client_phone = IPC_GET_ARG3(call);
  263.     screenbuffer_clear(&(connections[consnum].screenbuffer));
  264.    
  265.     /* Accept the connection */
  266.     ipc_answer_fast(iid,0,0,0);
  267.    
  268.     while (1) {
  269.         callid = async_get_call(&call);
  270.         arg1 = arg2 = 0;
  271.         switch (IPC_GET_METHOD(call)) {
  272.         case IPC_M_PHONE_HUNGUP:
  273.             /* TODO */
  274.             ipc_answer_fast(callid, 0,0,0);
  275.             return;
  276.         case CONSOLE_PUTCHAR:
  277.             write_char(consnum, IPC_GET_ARG1(call));
  278.             break;
  279.         case CONSOLE_CLEAR:
  280.             /* Send message to fb */
  281.             if (consnum == active_console) {
  282.                 send_call(fb_info.phone, FB_CLEAR, 0);
  283.             }
  284.            
  285.             screenbuffer_clear(&(connections[consnum].screenbuffer));
  286.            
  287.             break;
  288.         case CONSOLE_GOTO:
  289.            
  290.             screenbuffer_goto(&(connections[consnum].screenbuffer), IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  291.            
  292.             break;
  293.  
  294.         case CONSOLE_GETSIZE:
  295.             arg1 = fb_info.cols;
  296.             arg2 = fb_info.rows;
  297.             break;
  298.         case CONSOLE_FLUSH:
  299.             sync_send_2(fb_info.phone, FB_FLUSH, 0, 0, NULL, NULL);    
  300.             break;
  301.         case CONSOLE_GETCHAR:
  302.             if (keybuffer_empty(&(connections[consnum].keybuffer))) {
  303.                 /* buffer is empty -> store request */
  304.                 if (connections[consnum].keyrequest_counter < MAX_KEYREQUESTS_BUFFERED) {      
  305.                     fifo_push(connections[consnum].keyrequests, callid);
  306.                     connections[consnum].keyrequest_counter++;
  307.                 } else {
  308.                     /* no key available and too many requests => fail */
  309.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  310.                 }
  311.                 continue;
  312.             };
  313.             keybuffer_pop(&(connections[consnum].keybuffer), (char *)&arg1);
  314.            
  315.             break;
  316.         }
  317.         ipc_answer_fast(callid, 0, arg1, arg2);
  318.     }
  319. }
  320.  
  321. int main(int argc, char *argv[])
  322. {
  323.     ipcarg_t phonehash;
  324.     int kbd_phone, fb_phone;
  325.     ipcarg_t retval, arg1 = 0xdead, arg2 = 0xbeef;
  326.     int i;
  327.  
  328.     async_set_client_connection(client_connection);
  329.    
  330.     /* Connect to keyboard driver */
  331.  
  332.     while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
  333.         usleep(10000);
  334.     };
  335.    
  336.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  337.         return -1;
  338.     };
  339.  
  340.     /* Connect to framebuffer driver */
  341.    
  342.     while ((fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
  343.         usleep(10000);
  344.     }
  345.  
  346.     /* Initialize gcons */
  347.     gcons_init(fb_info.phone);
  348.     /* Synchronize, the gcons can have something in queue */
  349.     sync_send_2(fb_info.phone, FB_GET_CSIZE, 0, 0, NULL, NULL);
  350.  
  351.    
  352.     ipc_call_sync_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows), &(fb_info.cols));
  353.     nsend_call_2(fb_info.phone, FB_SET_STYLE, DEFAULT_FOREGROUND_COLOR, DEFAULT_BACKGROUND_COLOR);
  354.     nsend_call(fb_info.phone, FB_CLEAR, 0);
  355.    
  356.     /* Init virtual consoles */
  357.     for (i = 0; i < CONSOLE_COUNT; i++) {
  358.         connections[i].used = 0;
  359.         keybuffer_init(&(connections[i].keybuffer));
  360.        
  361.         connections[i].keyrequests.head = connections[i].keyrequests.tail = 0;
  362.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  363.         connections[i].keyrequest_counter = 0;
  364.        
  365.         if (screenbuffer_init(&(connections[i].screenbuffer), fb_info.cols, fb_info.rows ) == NULL) {
  366.             /*FIXME: handle error */
  367.             return -1;
  368.         }
  369.     }
  370.    
  371.     if ((interbuffer = mmap(NULL, sizeof(keyfield_t) * fb_info.cols * fb_info.rows , PROTO_READ|PROTO_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, 0 ,0 )) != NULL) {
  372.         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) {
  373.             munmap(interbuffer, sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  374.             interbuffer = NULL;
  375.         }
  376.     }
  377.  
  378.     /* FIXME: save kernel console screen */
  379.    
  380.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  381.    
  382.     sync_send_2(fb_info.phone, FB_CURSOR_GOTO, 0, 0, NULL, NULL);
  383.     nsend_call(fb_info.phone, FB_CURSOR_VISIBILITY, 1);
  384.  
  385.     /* Register at NS */
  386.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  387.         return -1;
  388.     };
  389.    
  390.     async_manager();
  391.  
  392.     return 0;  
  393. }
  394.  
  395.