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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. /** @defgroup console Console
  30.  * @brief   HelenOS console.
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. /* TODO: remove */
  37. #include <stdio.h>
  38.  
  39. #include <fb.h>
  40. #include <ipc/ipc.h>
  41. #include <keys.h>
  42. #include <ipc/fb.h>
  43. #include <ipc/services.h>
  44. #include <errno.h>
  45. #include <key_buffer.h>
  46. #include <console.h>
  47. #include <unistd.h>
  48. #include <async.h>
  49. #include <libadt/fifo.h>
  50. #include <screenbuffer.h>
  51. #include <sys/mman.h>
  52.  
  53. #include "gcons.h"
  54.  
  55. #define MAX_KEYREQUESTS_BUFFERED 32
  56.  
  57. #define NAME "CONSOLE"
  58.  
  59. /** Index of currently used virtual console.
  60.  */
  61. int active_console = 0;
  62.  
  63. /** Information about framebuffer
  64.  */
  65. struct {
  66.     int phone;      /**< Framebuffer phone */
  67.     ipcarg_t rows;      /**< Framebuffer rows */
  68.     ipcarg_t cols;      /**< Framebuffer columns */
  69. } fb_info;
  70.  
  71.  
  72. typedef struct {
  73.     keybuffer_t keybuffer;      /**< Buffer for incoming keys. */
  74.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t , MAX_KEYREQUESTS_BUFFERED);   /**< Buffer for unsatisfied request for keys. */
  75.     int keyrequest_counter;     /**< Number of requests in buffer. */
  76.     int client_phone;       /**< Phone to connected client. */
  77.     int used;           /**< 1 if this virtual console is connected to some client.*/
  78.     screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen contents and related settings. */
  79. } connection_t;
  80.  
  81. static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual consoles */
  82. static keyfield_t *interbuffer = NULL;          /**< Pointer to memory shared with framebufer used for faster virt. console switching */
  83.  
  84. static int kernel_pixmap = -1;      /**< Number of fb pixmap, where kernel console is stored */
  85.  
  86.  
  87. /** Find unused virtual console.
  88.  *
  89.  */
  90. static int find_free_connection(void)
  91. {
  92.     int i = 0;
  93.    
  94.     for (i=0; i < CONSOLE_COUNT; i++) {
  95.         if (!connections[i].used)
  96.             return i;
  97.     }
  98.     return -1;
  99. }
  100.  
  101. static void clrscr(void)
  102. {
  103.     async_msg(fb_info.phone, FB_CLEAR, 0);
  104. }
  105.  
  106. static void curs_visibility(int v)
  107. {
  108.     async_msg(fb_info.phone, FB_CURSOR_VISIBILITY, v);
  109. }
  110.  
  111. static void curs_goto(int row, int col)
  112. {
  113.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  114.    
  115. }
  116.  
  117. static void set_style(style_t *style)
  118. {
  119.     async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color, style->bg_color);
  120. }
  121.  
  122. static void set_style_col(int fgcolor, int bgcolor)
  123. {
  124.     async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  125. }
  126.  
  127. static void prtchr(char c, int row, int col)
  128. {
  129.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  130.    
  131. }
  132.  
  133. /** Check key and process special keys.
  134.  *
  135.  * */
  136. static void write_char(int console, char key)
  137. {
  138.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  139.    
  140.     switch (key) {
  141.         case '\n':
  142.             scr->position_y += 1;
  143.             scr->position_x =  0;
  144.             break;
  145.         case '\r':
  146.             break;
  147.         case '\t':
  148.             scr->position_x += 8;
  149.             scr->position_x -= scr->position_x % 8;
  150.             break;
  151.         case '\b':
  152.             if (scr->position_x == 0)
  153.                 break;
  154.  
  155.             scr->position_x--;
  156.  
  157.             if (console == active_console)
  158.                 prtchr(' ', scr->position_y, scr->position_x);
  159.    
  160.             screenbuffer_putchar(scr, ' ');
  161.            
  162.             break;
  163.         default:   
  164.             if (console == active_console)
  165.                 prtchr(key, scr->position_y, scr->position_x);
  166.    
  167.             screenbuffer_putchar(scr, key);
  168.             scr->position_x++;
  169.     }
  170.    
  171.     scr->position_y += (scr->position_x >= scr->size_x);
  172.    
  173.     if (scr->position_y >= scr->size_y) {
  174.         scr->position_y = scr->size_y - 1;
  175.         screenbuffer_clear_line(scr, scr->top_line);
  176.         scr->top_line = (scr->top_line+1) % scr->size_y;
  177.         if (console == active_console)
  178.             async_msg(fb_info.phone, FB_SCROLL, 1);
  179.     }
  180.    
  181.     scr->position_x = scr->position_x % scr->size_x;
  182.    
  183.     if (console == active_console)
  184.         curs_goto(scr->position_y, scr->position_x);
  185.    
  186. }
  187.  
  188. /** Save current screen to pixmap, draw old pixmap
  189.  *
  190.  * @param oldpixmap Old pixmap
  191.  * @return ID of pixmap of current screen
  192.  */
  193. static int switch_screens(int oldpixmap)
  194. {
  195.     int newpmap;
  196.        
  197.     /* Save screen */
  198.     newpmap = async_req(fb_info.phone, FB_VP2PIXMAP, 0, NULL);
  199.     if (newpmap < 0)
  200.         return -1;
  201.  
  202.     if (oldpixmap != -1) {
  203.         /* Show old screen */
  204.         async_msg_2(fb_info.phone, FB_VP_DRAW_PIXMAP, 0, oldpixmap);
  205.         /* Drop old pixmap */
  206.         async_msg(fb_info.phone, FB_DROP_PIXMAP, oldpixmap);
  207.     }
  208.    
  209.     return newpmap;
  210. }
  211.  
  212. /** Switch to new console */
  213. static void change_console(int newcons)
  214. {
  215.     connection_t *conn;
  216.     static int console_pixmap = -1;
  217.     int i, j, rc;
  218.     keyfield_t *field;
  219.     style_t *style;
  220.  
  221.     if (newcons == active_console)
  222.         return;
  223.  
  224.     if (newcons == KERNEL_CONSOLE) {
  225.         if (active_console == KERNEL_CONSOLE)
  226.             return;
  227.         active_console = KERNEL_CONSOLE;
  228.         curs_visibility(0);
  229.  
  230.         async_serialize_start();
  231.         if (kernel_pixmap == -1) {
  232.             /* store/restore unsupported */
  233.             set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  234.             clrscr();
  235.         } else {
  236.             gcons_in_kernel();
  237.             console_pixmap = switch_screens(kernel_pixmap);
  238.             kernel_pixmap = -1;
  239.         }
  240.         async_serialize_end();
  241.  
  242.         __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  243.         return;
  244.     }
  245.    
  246.     async_serialize_start();
  247.  
  248.     if (console_pixmap != -1) {
  249.         kernel_pixmap = switch_screens(console_pixmap);
  250.         console_pixmap = -1;
  251.     }
  252.     active_console = newcons;
  253.     gcons_change_console(newcons);
  254.     conn = &connections[active_console];
  255.  
  256.     set_style(&conn->screenbuffer.style);
  257.     curs_visibility(0);
  258.     if (interbuffer) {
  259.         for (i = 0; i < conn->screenbuffer.size_x; i++)
  260.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  261.                 interbuffer[i + j*conn->screenbuffer.size_x] = *get_field_at(&(conn->screenbuffer),i, j);
  262.         /* This call can preempt, but we are already at the end */
  263.         rc = async_req_2(fb_info.phone, FB_DRAW_TEXT_DATA, 0, 0, NULL, NULL);      
  264.     };
  265.    
  266.     if ((!interbuffer) || (rc != 0)) {
  267.         set_style(&conn->screenbuffer.style);
  268.         clrscr();
  269.         style = &conn->screenbuffer.style;
  270.  
  271.         for (j = 0; j < conn->screenbuffer.size_y; j++)
  272.             for (i = 0; i < conn->screenbuffer.size_x; i++) {
  273.                 field = get_field_at(&(conn->screenbuffer),i, j);
  274.                 if (!style_same(*style, field->style))
  275.                     set_style(&field->style);
  276.                 style = &field->style;
  277.                 if ((field->character == ' ') && (style_same(field->style, conn->screenbuffer.style)))
  278.                     continue;
  279.  
  280.                 prtchr(field->character, j, i);
  281.             }
  282.     }
  283.    
  284.     curs_goto(conn->screenbuffer.position_y, conn->screenbuffer.position_x);
  285.     curs_visibility(conn->screenbuffer.is_cursor_visible);
  286.  
  287.     async_serialize_end();
  288. }
  289.  
  290. /** Handler for keyboard */
  291. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  292. {
  293.     ipc_callid_t callid;
  294.     ipc_call_t call;
  295.     int retval;
  296.     int c;
  297.     connection_t *conn;
  298.     int newcon;
  299.    
  300.     /* Ignore parameters, the connection is alread opened */
  301.     while (1) {
  302.         callid = async_get_call(&call);
  303.         switch (IPC_GET_METHOD(call)) {
  304.         case IPC_M_PHONE_HUNGUP:
  305.             /* TODO: Handle hangup */
  306.             return;
  307.         case KBD_MS_LEFT:
  308.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  309.             if (newcon != -1)
  310.                 change_console(newcon);
  311.             retval = 0;
  312.             break;
  313.         case KBD_MS_MOVE:
  314.             gcons_mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  315.             retval = 0;
  316.             break;
  317.         case KBD_PUSHCHAR:
  318.             /* got key from keyboard driver */
  319.            
  320.             retval = 0;
  321.             c = IPC_GET_ARG1(call);
  322.             /* switch to another virtual console */
  323.            
  324.             conn = &connections[active_console];
  325. //          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
  326.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  327.                 if (c == 0x112)
  328.                     change_console(KERNEL_CONSOLE);
  329.                 else
  330.                     change_console(c - 0x101);
  331.                 break;
  332.             }
  333.            
  334.             /* if client is awaiting key, send it */
  335.             if (conn->keyrequest_counter > 0) {    
  336.                 conn->keyrequest_counter--;
  337.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
  338.                 break;
  339.             }
  340.            
  341.             keybuffer_push(&conn->keybuffer, c);
  342.             retval = 0;
  343.            
  344.             break;
  345.         default:
  346.             retval = ENOENT;
  347.         }
  348.         ipc_answer_fast(callid, retval, 0, 0);
  349.     }
  350. }
  351.  
  352. /** Default thread for new connections */
  353. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  354. {
  355.     ipc_callid_t callid;
  356.     ipc_call_t call;
  357.     int consnum;
  358.     ipcarg_t arg1, arg2;
  359.     connection_t *conn;
  360.  
  361.     if ((consnum = find_free_connection()) == -1) {
  362.         ipc_answer_fast(iid,ELIMIT,0,0);
  363.         return;
  364.     }
  365.     conn = &connections[consnum];
  366.     conn->used = 1;
  367.    
  368.     async_serialize_start();
  369.     gcons_notify_connect(consnum);
  370.     conn->client_phone = IPC_GET_ARG3(call);
  371.     screenbuffer_clear(&conn->screenbuffer);
  372.    
  373.     /* Accept the connection */
  374.     ipc_answer_fast(iid,0,0,0);
  375.  
  376.     while (1) {
  377.         async_serialize_end();
  378.         callid = async_get_call(&call);
  379.         async_serialize_start();
  380.  
  381.         arg1 = arg2 = 0;
  382.         switch (IPC_GET_METHOD(call)) {
  383.         case IPC_M_PHONE_HUNGUP:
  384.             gcons_notify_disconnect(consnum);
  385.            
  386.             /* Answer all pending requests */
  387.             while (conn->keyrequest_counter > 0) {     
  388.                 conn->keyrequest_counter--;
  389.                 ipc_answer_fast(fifo_pop(conn->keyrequests), ENOENT, 0, 0);
  390.                 break;
  391.             }
  392.             conn->used = 0;
  393.             return;
  394.         case CONSOLE_PUTCHAR:
  395.             write_char(consnum, IPC_GET_ARG1(call));
  396.             gcons_notify_char(consnum);
  397.             break;
  398.         case CONSOLE_CLEAR:
  399.             /* Send message to fb */
  400.             if (consnum == active_console) {
  401.                 async_msg(fb_info.phone, FB_CLEAR, 0);
  402.             }
  403.            
  404.             screenbuffer_clear(&conn->screenbuffer);
  405.            
  406.             break;
  407.         case CONSOLE_GOTO:
  408.            
  409.             screenbuffer_goto(&conn->screenbuffer, IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  410.             if (consnum == active_console)
  411.                 curs_goto(IPC_GET_ARG1(call),IPC_GET_ARG2(call));
  412.            
  413.             break;
  414.  
  415.         case CONSOLE_GETSIZE:
  416.             arg1 = fb_info.rows;
  417.             arg2 = fb_info.cols;
  418.             break;
  419.         case CONSOLE_FLUSH:
  420.             async_req_2(fb_info.phone, FB_FLUSH, 0, 0, NULL, NULL);    
  421.             break;
  422.         case CONSOLE_SET_STYLE:
  423.            
  424.             arg1 = IPC_GET_ARG1(call);
  425.             arg2 = IPC_GET_ARG2(call);
  426.             screenbuffer_set_style(&conn->screenbuffer,arg1, arg2);
  427.             if (consnum == active_console)
  428.                 set_style_col(arg1, arg2);
  429.                
  430.             break;
  431.         case CONSOLE_CURSOR_VISIBILITY:
  432.             arg1 = IPC_GET_ARG1(call);
  433.             conn->screenbuffer.is_cursor_visible = arg1;
  434.             if (consnum == active_console)
  435.                 curs_visibility(arg1);
  436.             break;
  437.         case CONSOLE_GETCHAR:
  438.             if (keybuffer_empty(&conn->keybuffer)) {
  439.                 /* buffer is empty -> store request */
  440.                 if (conn->keyrequest_counter < MAX_KEYREQUESTS_BUFFERED) {     
  441.                     fifo_push(conn->keyrequests, callid);
  442.                     conn->keyrequest_counter++;
  443.                 } else {
  444.                     /* no key available and too many requests => fail */
  445.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  446.                 }
  447.                 continue;
  448.             };
  449.             keybuffer_pop(&conn->keybuffer, (int *)&arg1);
  450.            
  451.             break;
  452.         }
  453.         ipc_answer_fast(callid, 0, arg1, arg2);
  454.     }
  455. }
  456.  
  457. int main(int argc, char *argv[])
  458. {
  459.     ipcarg_t phonehash;
  460.     int kbd_phone;
  461.     int i;
  462.  
  463.     async_set_client_connection(client_connection);
  464.    
  465.     /* Connect to keyboard driver */
  466.  
  467.     while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
  468.         usleep(10000);
  469.     };
  470.    
  471.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  472.         return -1;
  473.     };
  474.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  475.    
  476.     /* Connect to framebuffer driver */
  477.    
  478.     while ((fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
  479.         usleep(10000);
  480.     }
  481.    
  482.     /* Save old kernel screen */
  483.     kernel_pixmap = switch_screens(-1);
  484.  
  485.     /* Initialize gcons */
  486.     gcons_init(fb_info.phone);
  487.     /* Synchronize, the gcons can have something in queue */
  488.     async_req(fb_info.phone, FB_FLUSH, 0, NULL);
  489.     /* Enable double buffering */
  490.     async_msg_2(fb_info.phone, FB_VIEWPORT_DB, (sysarg_t)-1, 1);
  491.    
  492.     async_req_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows), &(fb_info.cols));
  493.     set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  494.     clrscr();
  495.    
  496.     /* Init virtual consoles */
  497.     for (i = 0; i < CONSOLE_COUNT; i++) {
  498.         connections[i].used = 0;
  499.         keybuffer_init(&(connections[i].keybuffer));
  500.        
  501.         connections[i].keyrequests.head = connections[i].keyrequests.tail = 0;
  502.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  503.         connections[i].keyrequest_counter = 0;
  504.        
  505.         if (screenbuffer_init(&(connections[i].screenbuffer), fb_info.cols, fb_info.rows ) == NULL) {
  506.             /*FIXME: handle error */
  507.             return -1;
  508.         }
  509.     }
  510.     connections[KERNEL_CONSOLE].used = 1;
  511.    
  512.     if ((interbuffer = mmap(NULL, sizeof(keyfield_t) * fb_info.cols * fb_info.rows , PROTO_READ|PROTO_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, 0 ,0 )) != NULL) {
  513.         if (async_req_3(fb_info.phone, IPC_M_AS_AREA_SEND, (ipcarg_t)interbuffer, 0, AS_AREA_READ, NULL, NULL, NULL) != 0) {
  514.             munmap(interbuffer, sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  515.             interbuffer = NULL;
  516.         }
  517.     }
  518.  
  519.     curs_goto(0,0);
  520.     curs_visibility(connections[active_console].screenbuffer.is_cursor_visible);
  521.  
  522.     /* Register at NS */
  523.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  524.         return -1;
  525.     };
  526.    
  527.     async_manager();
  528.  
  529.     return 0;  
  530. }
  531.  
  532. /** @}
  533.  */
  534.  
  535.