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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. /** Index of currently used virtual console.
  51.  */
  52. int active_console = 0;
  53.  
  54. /** Information about framebuffer
  55.  */
  56. struct {
  57.     int phone;      /**< Framebuffer phone */
  58.     ipcarg_t rows;      /**< Framebuffer rows */
  59.     ipcarg_t cols;      /**< Framebuffer columns */
  60. } fb_info;
  61.  
  62.  
  63. typedef struct {
  64.     keybuffer_t keybuffer;      /**< Buffer for incoming keys. */
  65.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t , MAX_KEYREQUESTS_BUFFERED);   /**< Buffer for unsatisfied request for keys. */
  66.     int keyrequest_counter;     /**< Number of requests in buffer. */
  67.     int client_phone;       /**< Phone to connected client. */
  68.     int used;           /**< 1 if this virtual console is connected to some client.*/
  69.     screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen contents and related settings. */
  70. } connection_t;
  71.  
  72. static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual consoles */
  73. static keyfield_t *interbuffer = NULL;          /**< Pointer to memory shared with framebufer used for faster virt. console switching */
  74.  
  75. static int kernel_pixmap = -1;      /**< Number of fb pixmap, where kernel console is stored */
  76.  
  77.  
  78. /** Find unused virtual console.
  79.  *
  80.  */
  81. static int find_free_connection()
  82. {
  83.     int i = 0;
  84.    
  85.     while (i < CONSOLE_COUNT) {
  86.         if (connections[i].used == 0)
  87.             return i;
  88.         ++i;
  89.     }
  90.     return CONSOLE_COUNT;
  91. }
  92.  
  93. /** Find index of virtual console used by client with given phone.
  94.  *
  95.  */
  96. static int find_connection(int client_phone)
  97. {
  98.     int i = 0;
  99.    
  100.     while (i < CONSOLE_COUNT) {
  101.         if (connections[i].client_phone == client_phone)
  102.             return i;
  103.         ++i;
  104.     }
  105.     return  CONSOLE_COUNT;
  106. }
  107.  
  108. static void clrscr(void)
  109. {
  110.     nsend_call(fb_info.phone, FB_CLEAR, 0);
  111. }
  112.  
  113. static void curs_visibility(int v)
  114. {
  115.     send_call(fb_info.phone, FB_CURSOR_VISIBILITY, v);
  116. }
  117.  
  118. static void curs_goto(int row, int col)
  119. {
  120.     nsend_call_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  121.    
  122. }
  123.  
  124. static void set_style(style_t *style)
  125. {
  126.     nsend_call_2(fb_info.phone, FB_SET_STYLE, style->fg_color, style->bg_color);
  127. }
  128.  
  129. static void set_style_col(int fgcolor, int bgcolor)
  130. {
  131.     nsend_call_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  132. }
  133.  
  134. static void prtchr(char c, int row, int col)
  135. {
  136.     nsend_call_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  137.    
  138. }
  139.  
  140. /** Check key and process special keys.
  141.  *
  142.  * */
  143. static void write_char(int console, char key)
  144. {
  145.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  146.    
  147.     switch (key) {
  148.         case '\n':
  149.             scr->position_y += 1;
  150.             scr->position_x =  0;
  151.             break;
  152.         case '\r':
  153.             break;
  154.         case '\t':
  155.             scr->position_x += 8;
  156.             scr->position_x -= scr->position_x % 8;
  157.             break;
  158.         case '\b':
  159.             if (scr->position_x == 0)
  160.                 break;
  161.  
  162.             scr->position_x--;
  163.  
  164.             if (console == active_console)
  165.                 prtchr(' ', scr->position_y, scr->position_x);
  166.    
  167.             screenbuffer_putchar(scr, ' ');
  168.            
  169.             break;
  170.         default:   
  171.             if (console == active_console)
  172.                 prtchr(key, scr->position_y, scr->position_x);
  173.    
  174.             screenbuffer_putchar(scr, key);
  175.             scr->position_x++;
  176.     }
  177.    
  178.     scr->position_y += (scr->position_x >= scr->size_x);
  179.    
  180.     if (scr->position_y >= scr->size_y) {
  181.         scr->position_y = scr->size_y - 1;
  182.         screenbuffer_clear_line(scr, scr->top_line++);
  183.         if (console == active_console)
  184.             nsend_call(fb_info.phone, FB_SCROLL, 1);
  185.     }
  186.    
  187.     scr->position_x = scr->position_x % scr->size_x;
  188.    
  189.     if (console == active_console)
  190.         curs_goto(scr->position_y, scr->position_x);
  191.    
  192. }
  193.  
  194. /** Save current screen to pixmap, draw old pixmap
  195.  *
  196.  * @param oldpixmap Old pixmap
  197.  * @return ID of pixmap of current screen
  198.  */
  199. static int switch_screens(int oldpixmap)
  200. {
  201.     int newpmap;
  202.        
  203.     /* Save screen */
  204.     newpmap = sync_send(fb_info.phone, FB_VP2PIXMAP, 0, NULL);
  205.     if (newpmap < 0)
  206.         return -1;
  207.  
  208.     if (oldpixmap != -1) {
  209.         /* Show old screen */
  210.         nsend_call_2(fb_info.phone, FB_VP_DRAW_PIXMAP, 0, oldpixmap);
  211.         /* Drop old pixmap */
  212.         nsend_call(fb_info.phone, FB_DROP_PIXMAP, oldpixmap);
  213.     }
  214.    
  215.     return newpmap;
  216. }
  217.  
  218. /** Switch to new console */
  219. static void change_console(int newcons)
  220. {
  221.     connection_t *conn;
  222.     static int console_pixmap = -1;
  223.     int i, j;
  224.     char c;
  225.  
  226.     if (newcons == active_console)
  227.         return;
  228.  
  229.     if (newcons == KERNEL_CONSOLE) {
  230.         if (active_console == KERNEL_CONSOLE)
  231.             return;
  232.         active_console = KERNEL_CONSOLE;
  233.         curs_visibility(0);
  234.  
  235.         if (kernel_pixmap == -1) {
  236.             /* store/restore unsupported */
  237.             set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  238.             clrscr();
  239.         } else {
  240.             gcons_in_kernel();
  241.             console_pixmap = switch_screens(kernel_pixmap);
  242.             kernel_pixmap = -1;
  243.         }
  244.  
  245.         __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  246.         return;
  247.     }
  248.    
  249.     if (console_pixmap != -1) {
  250.         kernel_pixmap = switch_screens(console_pixmap);
  251.         console_pixmap = -1;
  252.     }
  253.    
  254.     active_console = newcons;
  255.     gcons_change_console(newcons);
  256.     conn = &connections[active_console];
  257.  
  258.     set_style(&conn->screenbuffer.style);
  259.     curs_goto(conn->screenbuffer.position_y, conn->screenbuffer.position_x);
  260.     if (interbuffer) {
  261.         for (i = 0; i < conn->screenbuffer.size_x; i++)
  262.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  263.                 interbuffer[i + j*conn->screenbuffer.size_x] = *get_field_at(&(conn->screenbuffer),i, j);
  264.         /* This call can preempt, but we are already at the end */
  265.         sync_send_2(fb_info.phone, FB_DRAW_TEXT_DATA, 0, 0, NULL, NULL);       
  266.     } else {
  267.         curs_visibility(0);
  268.         clrscr();
  269.        
  270.         for (i = 0; i < conn->screenbuffer.size_x; i++)
  271.             for (j = 0; j < conn->screenbuffer.size_y; j++) {
  272.                 c = get_field_at(&(conn->screenbuffer),i, j)->character;
  273.                 if (c && c != ' ')
  274.                     prtchr(c, j, i);
  275.             }
  276.        
  277.         curs_visibility(1);
  278.     }
  279. }
  280.  
  281. /** Handler for keyboard */
  282. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  283. {
  284.     ipc_callid_t callid;
  285.     ipc_call_t call;
  286.     int retval;
  287.     int c;
  288.     connection_t *conn;
  289.    
  290.     /* Ignore parameters, the connection is alread opened */
  291.     while (1) {
  292.         callid = async_get_call(&call);
  293.         switch (IPC_GET_METHOD(call)) {
  294.         case IPC_M_PHONE_HUNGUP:
  295.             ipc_answer_fast(callid,0,0,0);
  296.             /* TODO: Handle hangup */
  297.             return;
  298.         case KBD_PUSHCHAR:
  299.             /* got key from keyboard driver */
  300.            
  301.             retval = 0;
  302.             c = IPC_GET_ARG1(call);
  303.             /* switch to another virtual console */
  304.            
  305.             conn = &connections[active_console];
  306. //          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
  307.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  308.                 if (c == 0x112)
  309.                     change_console(KERNEL_CONSOLE);
  310.                 else
  311.                     change_console(c - 0x101);
  312.                 break;
  313.             }
  314.            
  315.             /* if client is awaiting key, send it */
  316.             if (conn->keyrequest_counter > 0) {    
  317.                 conn->keyrequest_counter--;
  318.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
  319.                 break;
  320.             }
  321.            
  322.             /*FIXME: else store key to its buffer */
  323.             keybuffer_push(&conn->keybuffer, c);
  324.            
  325.             break;
  326.         default:
  327.             retval = ENOENT;
  328.         }      
  329.         ipc_answer_fast(callid, retval, 0, 0);
  330.     }
  331. }
  332.  
  333. /** Default thread for new connections */
  334. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  335. {
  336.     ipc_callid_t callid;
  337.     ipc_call_t call;
  338.     int consnum;
  339.     ipcarg_t arg1, arg2;
  340.  
  341.     if ((consnum = find_free_connection()) == CONSOLE_COUNT) {
  342.         ipc_answer_fast(iid,ELIMIT,0,0);
  343.         return;
  344.     }
  345.    
  346.     gcons_notify_connect(consnum);
  347.     connections[consnum].used = 1;
  348.     connections[consnum].client_phone = IPC_GET_ARG3(call);
  349.     screenbuffer_clear(&(connections[consnum].screenbuffer));
  350.    
  351.     /* Accept the connection */
  352.     ipc_answer_fast(iid,0,0,0);
  353.    
  354.     while (1) {
  355.         callid = async_get_call(&call);
  356.         arg1 = arg2 = 0;
  357.         switch (IPC_GET_METHOD(call)) {
  358.         case IPC_M_PHONE_HUNGUP:
  359.             /* TODO */
  360.             ipc_answer_fast(callid, 0,0,0);
  361.             return;
  362.         case CONSOLE_PUTCHAR:
  363.             write_char(consnum, IPC_GET_ARG1(call));
  364.             gcons_notify_char(consnum);
  365.             break;
  366.         case CONSOLE_CLEAR:
  367.             /* Send message to fb */
  368.             if (consnum == active_console) {
  369.                 send_call(fb_info.phone, FB_CLEAR, 0);
  370.             }
  371.            
  372.             screenbuffer_clear(&(connections[consnum].screenbuffer));
  373.            
  374.             break;
  375.         case CONSOLE_GOTO:
  376.            
  377.             screenbuffer_goto(&(connections[consnum].screenbuffer), IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  378.             curs_goto(IPC_GET_ARG1(call),IPC_GET_ARG2(call));
  379.            
  380.             break;
  381.  
  382.         case CONSOLE_GETSIZE:
  383.             arg1 = fb_info.rows;
  384.             arg2 = fb_info.cols;
  385.             break;
  386.         case CONSOLE_FLUSH:
  387.             sync_send_2(fb_info.phone, FB_FLUSH, 0, 0, NULL, NULL);    
  388.             break;
  389.         case CONSOLE_SET_STYLE:
  390.            
  391.             arg1 = IPC_GET_ARG1(call);
  392.             arg2 = IPC_GET_ARG2(call);
  393.             screenbuffer_set_style(&(connections[consnum].screenbuffer),arg1, arg2);
  394.             if (consnum == active_console)
  395.                 set_style_col(arg1, arg2);
  396.                
  397.             break;
  398.         case CONSOLE_GETCHAR:
  399.             if (keybuffer_empty(&(connections[consnum].keybuffer))) {
  400.                 /* buffer is empty -> store request */
  401.                 if (connections[consnum].keyrequest_counter < MAX_KEYREQUESTS_BUFFERED) {      
  402.                     fifo_push(connections[consnum].keyrequests, callid);
  403.                     connections[consnum].keyrequest_counter++;
  404.                 } else {
  405.                     /* no key available and too many requests => fail */
  406.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  407.                 }
  408.                 continue;
  409.             };
  410.             keybuffer_pop(&(connections[consnum].keybuffer), (char *)&arg1);
  411.            
  412.             break;
  413.         }
  414.         ipc_answer_fast(callid, 0, arg1, arg2);
  415.     }
  416. }
  417.  
  418. int main(int argc, char *argv[])
  419. {
  420.     ipcarg_t phonehash;
  421.     int kbd_phone, fb_phone;
  422.     ipcarg_t retval, arg1 = 0xdead, arg2 = 0xbeef;
  423.     int i;
  424.  
  425.     async_set_client_connection(client_connection);
  426.    
  427.     /* Connect to keyboard driver */
  428.  
  429.     while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
  430.         usleep(10000);
  431.     };
  432.    
  433.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  434.         return -1;
  435.     };
  436.  
  437.     /* Connect to framebuffer driver */
  438.    
  439.     while ((fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
  440.         usleep(10000);
  441.     }
  442.    
  443.     /* Save old kernel screen */
  444.     kernel_pixmap = switch_screens(-1);
  445.  
  446.     /* Initialize gcons */
  447.     gcons_init(fb_info.phone);
  448.     /* Synchronize, the gcons can have something in queue */
  449.     sync_send_2(fb_info.phone, FB_GET_CSIZE, 0, 0, NULL, NULL);
  450.  
  451.    
  452.     ipc_call_sync_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows), &(fb_info.cols));
  453.     set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  454.     clrscr();
  455.    
  456.     /* Init virtual consoles */
  457.     for (i = 0; i < CONSOLE_COUNT; i++) {
  458.         connections[i].used = 0;
  459.         keybuffer_init(&(connections[i].keybuffer));
  460.        
  461.         connections[i].keyrequests.head = connections[i].keyrequests.tail = 0;
  462.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  463.         connections[i].keyrequest_counter = 0;
  464.        
  465.         if (screenbuffer_init(&(connections[i].screenbuffer), fb_info.cols, fb_info.rows ) == NULL) {
  466.             /*FIXME: handle error */
  467.             return -1;
  468.         }
  469.     }
  470.    
  471.     if ((interbuffer = mmap(NULL, sizeof(keyfield_t) * fb_info.cols * fb_info.rows , PROTO_READ|PROTO_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, 0 ,0 )) != NULL) {
  472.         if (ipc_call_sync_3(fb_info.phone, IPC_M_AS_AREA_SEND, (ipcarg_t)interbuffer, 0, AS_AREA_READ, NULL, NULL, NULL) != 0) {
  473.             munmap(interbuffer, sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  474.             interbuffer = NULL;
  475.         }
  476.     }
  477.  
  478.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  479.    
  480.     sync_send_2(fb_info.phone, FB_CURSOR_GOTO, 0, 0, NULL, NULL);
  481.     nsend_call(fb_info.phone, FB_CURSOR_VISIBILITY, 1);
  482.  
  483.     /* Register at NS */
  484.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  485.         return -1;
  486.     };
  487.    
  488.     async_manager();
  489.  
  490.     return 0;  
  491. }
  492.  
  493.