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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. /** @addtogroup console
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. /* TODO: remove */
  36. #include <stdio.h>
  37.  
  38. #include <fb.h>
  39. #include <ipc/ipc.h>
  40. #include <keys.h>
  41. #include <ipc/fb.h>
  42. #include <ipc/services.h>
  43. #include <errno.h>
  44. #include <key_buffer.h>
  45. #include <console.h>
  46. #include <unistd.h>
  47. #include <async.h>
  48. #include <libadt/fifo.h>
  49. #include <screenbuffer.h>
  50. #include <sys/mman.h>
  51.  
  52. #include "gcons.h"
  53.  
  54. #define MAX_KEYREQUESTS_BUFFERED 32
  55.  
  56. #define NAME "CONSOLE"
  57.  
  58. /** Index of currently used virtual console.
  59.  */
  60. int active_console = 0;
  61.  
  62. /** Information about framebuffer
  63.  */
  64. struct {
  65.     int phone;      /**< Framebuffer phone */
  66.     ipcarg_t rows;      /**< Framebuffer rows */
  67.     ipcarg_t cols;      /**< Framebuffer columns */
  68. } fb_info;
  69.  
  70.  
  71. typedef struct {
  72.     keybuffer_t keybuffer;      /**< Buffer for incoming keys. */
  73.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t , MAX_KEYREQUESTS_BUFFERED);   /**< Buffer for unsatisfied request for keys. */
  74.     int keyrequest_counter;     /**< Number of requests in buffer. */
  75.     int client_phone;       /**< Phone to connected client. */
  76.     int used;           /**< 1 if this virtual console is connected to some client.*/
  77.     screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen contents and related settings. */
  78. } connection_t;
  79.  
  80. static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual consoles */
  81. static keyfield_t *interbuffer = NULL;          /**< Pointer to memory shared with framebufer used for faster virt. console switching */
  82.  
  83. static int kernel_pixmap = -1;      /**< Number of fb pixmap, where kernel console is stored */
  84.  
  85.  
  86. /** Find unused virtual console.
  87.  *
  88.  */
  89. static int find_free_connection(void)
  90. {
  91.     int i = 0;
  92.    
  93.     for (i=0; i < CONSOLE_COUNT; i++) {
  94.         if (!connections[i].used)
  95.             return i;
  96.     }
  97.     return -1;
  98. }
  99.  
  100. static void clrscr(void)
  101. {
  102.     async_msg(fb_info.phone, FB_CLEAR, 0);
  103. }
  104.  
  105. static void curs_visibility(int v)
  106. {
  107.     async_msg(fb_info.phone, FB_CURSOR_VISIBILITY, v);
  108. }
  109.  
  110. static void curs_goto(int row, int col)
  111. {
  112.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  113.    
  114. }
  115.  
  116. static void set_style(style_t *style)
  117. {
  118.     async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color, style->bg_color);
  119. }
  120.  
  121. static void set_style_col(int fgcolor, int bgcolor)
  122. {
  123.     async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  124. }
  125.  
  126. static void prtchr(char c, int row, int col)
  127. {
  128.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  129.    
  130. }
  131.  
  132. /** Check key and process special keys.
  133.  *
  134.  * */
  135. static void write_char(int console, char key)
  136. {
  137.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  138.    
  139.     switch (key) {
  140.         case '\n':
  141.             scr->position_y += 1;
  142.             scr->position_x =  0;
  143.             break;
  144.         case '\r':
  145.             break;
  146.         case '\t':
  147.             scr->position_x += 8;
  148.             scr->position_x -= scr->position_x % 8;
  149.             break;
  150.         case '\b':
  151.             if (scr->position_x == 0)
  152.                 break;
  153.  
  154.             scr->position_x--;
  155.  
  156.             if (console == active_console)
  157.                 prtchr(' ', scr->position_y, scr->position_x);
  158.    
  159.             screenbuffer_putchar(scr, ' ');
  160.            
  161.             break;
  162.         default:   
  163.             if (console == active_console)
  164.                 prtchr(key, scr->position_y, scr->position_x);
  165.    
  166.             screenbuffer_putchar(scr, key);
  167.             scr->position_x++;
  168.     }
  169.    
  170.     scr->position_y += (scr->position_x >= scr->size_x);
  171.    
  172.     if (scr->position_y >= scr->size_y) {
  173.         scr->position_y = scr->size_y - 1;
  174.         screenbuffer_clear_line(scr, scr->top_line);
  175.         scr->top_line = (scr->top_line+1) % scr->size_y;
  176.         if (console == active_console)
  177.             async_msg(fb_info.phone, FB_SCROLL, 1);
  178.     }
  179.    
  180.     scr->position_x = scr->position_x % scr->size_x;
  181.    
  182.     if (console == active_console)
  183.         curs_goto(scr->position_y, scr->position_x);
  184.    
  185. }
  186.  
  187. /** Save current screen to pixmap, draw old pixmap
  188.  *
  189.  * @param oldpixmap Old pixmap
  190.  * @return ID of pixmap of current screen
  191.  */
  192. static int switch_screens(int oldpixmap)
  193. {
  194.     int newpmap;
  195.        
  196.     /* Save screen */
  197.     newpmap = async_req(fb_info.phone, FB_VP2PIXMAP, 0, NULL);
  198.     if (newpmap < 0)
  199.         return -1;
  200.  
  201.     if (oldpixmap != -1) {
  202.         /* Show old screen */
  203.         async_msg_2(fb_info.phone, FB_VP_DRAW_PIXMAP, 0, oldpixmap);
  204.         /* Drop old pixmap */
  205.         async_msg(fb_info.phone, FB_DROP_PIXMAP, oldpixmap);
  206.     }
  207.    
  208.     return newpmap;
  209. }
  210.  
  211. /** Switch to new console */
  212. static void change_console(int newcons)
  213. {
  214.     connection_t *conn;
  215.     static int console_pixmap = -1;
  216.     int i, j, rc;
  217.     keyfield_t *field;
  218.     style_t *style;
  219.  
  220.     if (newcons == active_console)
  221.         return;
  222.  
  223.     if (newcons == KERNEL_CONSOLE) {
  224.         if (active_console == KERNEL_CONSOLE)
  225.             return;
  226.         active_console = KERNEL_CONSOLE;
  227.         curs_visibility(0);
  228.  
  229.         async_serialize_start();
  230.         if (kernel_pixmap == -1) {
  231.             /* store/restore unsupported */
  232.             set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  233.             clrscr();
  234.         } else {
  235.             gcons_in_kernel();
  236.             console_pixmap = switch_screens(kernel_pixmap);
  237.             kernel_pixmap = -1;
  238.         }
  239.         async_serialize_end();
  240.  
  241.         __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  242.         return;
  243.     }
  244.    
  245.     async_serialize_start();
  246.  
  247.     if (console_pixmap != -1) {
  248.         kernel_pixmap = switch_screens(console_pixmap);
  249.         console_pixmap = -1;
  250.     }
  251.     active_console = newcons;
  252.     gcons_change_console(newcons);
  253.     conn = &connections[active_console];
  254.  
  255.     set_style(&conn->screenbuffer.style);
  256.     curs_visibility(0);
  257.     if (interbuffer) {
  258.         for (i = 0; i < conn->screenbuffer.size_x; i++)
  259.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  260.                 interbuffer[i + j*conn->screenbuffer.size_x] = *get_field_at(&(conn->screenbuffer),i, j);
  261.         /* This call can preempt, but we are already at the end */
  262.         rc = async_req_2(fb_info.phone, FB_DRAW_TEXT_DATA, 0, 0, NULL, NULL);      
  263.     };
  264.    
  265.     if ((!interbuffer) || (rc != 0)) {
  266.         set_style(&conn->screenbuffer.style);
  267.         clrscr();
  268.         style = &conn->screenbuffer.style;
  269.  
  270.         for (j = 0; j < conn->screenbuffer.size_y; j++)
  271.             for (i = 0; i < conn->screenbuffer.size_x; i++) {
  272.                 field = get_field_at(&(conn->screenbuffer),i, j);
  273.                 if (!style_same(*style, field->style))
  274.                     set_style(&field->style);
  275.                 style = &field->style;
  276.                 if ((field->character == ' ') && (style_same(field->style, conn->screenbuffer.style)))
  277.                     continue;
  278.  
  279.                 prtchr(field->character, j, i);
  280.             }
  281.     }
  282.    
  283.     curs_goto(conn->screenbuffer.position_y, conn->screenbuffer.position_x);
  284.     curs_visibility(conn->screenbuffer.is_cursor_visible);
  285.  
  286.     async_serialize_end();
  287. }
  288.  
  289. /** Handler for keyboard */
  290. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  291. {
  292.     ipc_callid_t callid;
  293.     ipc_call_t call;
  294.     int retval;
  295.     int c;
  296.     connection_t *conn;
  297.     int newcon;
  298.    
  299.     /* Ignore parameters, the connection is alread opened */
  300.     while (1) {
  301.         callid = async_get_call(&call);
  302.         switch (IPC_GET_METHOD(call)) {
  303.         case IPC_M_PHONE_HUNGUP:
  304.             /* TODO: Handle hangup */
  305.             return;
  306.         case KBD_MS_LEFT:
  307.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  308.             if (newcon != -1)
  309.                 change_console(newcon);
  310.             retval = 0;
  311.             break;
  312.         case KBD_MS_MOVE:
  313.             gcons_mouse_move(IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  314.             retval = 0;
  315.             break;
  316.         case KBD_PUSHCHAR:
  317.             /* got key from keyboard driver */
  318.            
  319.             retval = 0;
  320.             c = IPC_GET_ARG1(call);
  321.             /* switch to another virtual console */
  322.            
  323.             conn = &connections[active_console];
  324. //          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
  325.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  326.                 if (c == 0x112)
  327.                     change_console(KERNEL_CONSOLE);
  328.                 else
  329.                     change_console(c - 0x101);
  330.                 break;
  331.             }
  332.            
  333.             /* if client is awaiting key, send it */
  334.             if (conn->keyrequest_counter > 0) {    
  335.                 conn->keyrequest_counter--;
  336.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
  337.                 break;
  338.             }
  339.            
  340.             keybuffer_push(&conn->keybuffer, c);
  341.             retval = 0;
  342.            
  343.             break;
  344.         default:
  345.             retval = ENOENT;
  346.         }
  347.         ipc_answer_fast(callid, retval, 0, 0);
  348.     }
  349. }
  350.  
  351. /** Default thread for new connections */
  352. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  353. {
  354.     ipc_callid_t callid;
  355.     ipc_call_t call;
  356.     int consnum;
  357.     ipcarg_t arg1, arg2;
  358.     connection_t *conn;
  359.  
  360.     if ((consnum = find_free_connection()) == -1) {
  361.         ipc_answer_fast(iid,ELIMIT,0,0);
  362.         return;
  363.     }
  364.     conn = &connections[consnum];
  365.     conn->used = 1;
  366.    
  367.     async_serialize_start();
  368.     gcons_notify_connect(consnum);
  369.     conn->client_phone = IPC_GET_ARG3(call);
  370.     screenbuffer_clear(&conn->screenbuffer);
  371.    
  372.     /* Accept the connection */
  373.     ipc_answer_fast(iid,0,0,0);
  374.  
  375.     while (1) {
  376.         async_serialize_end();
  377.         callid = async_get_call(&call);
  378.         async_serialize_start();
  379.  
  380.         arg1 = arg2 = 0;
  381.         switch (IPC_GET_METHOD(call)) {
  382.         case IPC_M_PHONE_HUNGUP:
  383.             gcons_notify_disconnect(consnum);
  384.            
  385.             /* Answer all pending requests */
  386.             while (conn->keyrequest_counter > 0) {     
  387.                 conn->keyrequest_counter--;
  388.                 ipc_answer_fast(fifo_pop(conn->keyrequests), ENOENT, 0, 0);
  389.                 break;
  390.             }
  391.             conn->used = 0;
  392.             return;
  393.         case CONSOLE_PUTCHAR:
  394.             write_char(consnum, IPC_GET_ARG1(call));
  395.             gcons_notify_char(consnum);
  396.             break;
  397.         case CONSOLE_CLEAR:
  398.             /* Send message to fb */
  399.             if (consnum == active_console) {
  400.                 async_msg(fb_info.phone, FB_CLEAR, 0);
  401.             }
  402.            
  403.             screenbuffer_clear(&conn->screenbuffer);
  404.            
  405.             break;
  406.         case CONSOLE_GOTO:
  407.            
  408.             screenbuffer_goto(&conn->screenbuffer, IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  409.             if (consnum == active_console)
  410.                 curs_goto(IPC_GET_ARG1(call),IPC_GET_ARG2(call));
  411.            
  412.             break;
  413.  
  414.         case CONSOLE_GETSIZE:
  415.             arg1 = fb_info.rows;
  416.             arg2 = fb_info.cols;
  417.             break;
  418.         case CONSOLE_FLUSH:
  419.             if (consnum == active_console)
  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.