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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.     char c;
  221.  
  222.     if (newcons == active_console)
  223.         return;
  224.  
  225.     if (newcons == KERNEL_CONSOLE) {
  226.         if (active_console == KERNEL_CONSOLE)
  227.             return;
  228.         active_console = KERNEL_CONSOLE;
  229.         curs_visibility(0);
  230.  
  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.  
  241.         __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  242.         return;
  243.     }
  244.    
  245.     if (console_pixmap != -1) {
  246.         kernel_pixmap = switch_screens(console_pixmap);
  247.         console_pixmap = -1;
  248.     }
  249.     active_console = newcons;
  250.     gcons_change_console(newcons);
  251.     conn = &connections[active_console];
  252.  
  253.     set_style(&conn->screenbuffer.style);
  254.     curs_visibility(0);
  255.     if (interbuffer) {
  256.         for (i = 0; i < conn->screenbuffer.size_x; i++)
  257.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  258.                 interbuffer[i + j*conn->screenbuffer.size_x] = *get_field_at(&(conn->screenbuffer),i, j);
  259.         /* This call can preempt, but we are already at the end */
  260.         rc = async_req_2(fb_info.phone, FB_DRAW_TEXT_DATA, 0, 0, NULL, NULL);      
  261.     };
  262.    
  263.     if ((!interbuffer) || (rc != 0)) {
  264.         set_style(&conn->screenbuffer.style);
  265.         clrscr();
  266.         style = &conn->screenbuffer.style;
  267.  
  268.         for (j = 0; j < conn->screenbuffer.size_y; j++)
  269.             for (i = 0; i < conn->screenbuffer.size_x; i++) {
  270.                 field = get_field_at(&(conn->screenbuffer),i, j);
  271.                 if (!style_same(*style, field->style))
  272.                     set_style(&field->style);
  273.                 style = &field->style;
  274.                 if ((field->character == ' ') && (style_same(field->style, conn->screenbuffer.style)))
  275.                     continue;
  276.  
  277.                 prtchr(field->character, j, i);
  278.             }
  279.     }
  280.    
  281.     curs_goto(conn->screenbuffer.position_y, conn->screenbuffer.position_x);
  282.     curs_visibility(conn->screenbuffer.is_cursor_visible);
  283. }
  284.  
  285. /** Handler for keyboard */
  286. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  287. {
  288.     ipc_callid_t callid;
  289.     ipc_call_t call;
  290.     int retval;
  291.     int c;
  292.     connection_t *conn;
  293.    
  294.     /* Ignore parameters, the connection is alread opened */
  295.     while (1) {
  296.         callid = async_get_call(&call);
  297.         switch (IPC_GET_METHOD(call)) {
  298.         case IPC_M_PHONE_HUNGUP:
  299.             /* TODO: Handle hangup */
  300.             return;
  301.         case KBD_PUSHCHAR:
  302.             /* got key from keyboard driver */
  303.            
  304.             retval = 0;
  305.             c = IPC_GET_ARG1(call);
  306.             /* switch to another virtual console */
  307.            
  308.             conn = &connections[active_console];
  309. //          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
  310.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  311.                 async_serialize_start();
  312.                 if (c == 0x112)
  313.                     change_console(KERNEL_CONSOLE);
  314.                 else
  315.                     change_console(c - 0x101);
  316.                 async_serialize_end();
  317.                 break;
  318.             }
  319.            
  320.             /* if client is awaiting key, send it */
  321.             if (conn->keyrequest_counter > 0) {    
  322.                 conn->keyrequest_counter--;
  323.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
  324.                 break;
  325.             }
  326.            
  327.             /*FIXME: else store key to its buffer */
  328.             keybuffer_push(&conn->keybuffer, c);
  329.            
  330.             break;
  331.         default:
  332.             retval = ENOENT;
  333.         }
  334.         ipc_answer_fast(callid, retval, 0, 0);
  335.     }
  336. }
  337.  
  338. /** Default thread for new connections */
  339. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  340. {
  341.     ipc_callid_t callid;
  342.     ipc_call_t call;
  343.     int consnum;
  344.     ipcarg_t arg1, arg2;
  345.     connection_t *conn;
  346.  
  347.     if ((consnum = find_free_connection()) == -1) {
  348.         ipc_answer_fast(iid,ELIMIT,0,0);
  349.         return;
  350.     }
  351.     conn = &connections[consnum];
  352.     conn->used = 1;
  353.    
  354.     async_serialize_start();
  355.     gcons_notify_connect(consnum);
  356.     conn->client_phone = IPC_GET_ARG3(call);
  357.     screenbuffer_clear(&conn->screenbuffer);
  358.    
  359.     /* Accept the connection */
  360.     ipc_answer_fast(iid,0,0,0);
  361.  
  362.     while (1) {
  363.         async_serialize_end();
  364.         callid = async_get_call(&call);
  365.         async_serialize_start();
  366.  
  367.         arg1 = arg2 = 0;
  368.         switch (IPC_GET_METHOD(call)) {
  369.         case IPC_M_PHONE_HUNGUP:
  370.             gcons_notify_disconnect(consnum);
  371.            
  372.             /* Answer all pending requests */
  373.             while (conn->keyrequest_counter > 0) {     
  374.                 conn->keyrequest_counter--;
  375.                 ipc_answer_fast(fifo_pop(conn->keyrequests), ENOENT, 0, 0);
  376.                 break;
  377.             }
  378.             conn->used = 0;
  379.             return;
  380.         case CONSOLE_PUTCHAR:
  381.             write_char(consnum, IPC_GET_ARG1(call));
  382.             gcons_notify_char(consnum);
  383.             break;
  384.         case CONSOLE_CLEAR:
  385.             /* Send message to fb */
  386.             if (consnum == active_console) {
  387.                 async_msg(fb_info.phone, FB_CLEAR, 0);
  388.             }
  389.            
  390.             screenbuffer_clear(&conn->screenbuffer);
  391.            
  392.             break;
  393.         case CONSOLE_GOTO:
  394.            
  395.             screenbuffer_goto(&conn->screenbuffer, IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  396.             if (consnum == active_console)
  397.                 curs_goto(IPC_GET_ARG1(call),IPC_GET_ARG2(call));
  398.            
  399.             break;
  400.  
  401.         case CONSOLE_GETSIZE:
  402.             arg1 = fb_info.rows;
  403.             arg2 = fb_info.cols;
  404.             break;
  405.         case CONSOLE_FLUSH:
  406.             async_req_2(fb_info.phone, FB_FLUSH, 0, 0, NULL, NULL);    
  407.             break;
  408.         case CONSOLE_SET_STYLE:
  409.            
  410.             arg1 = IPC_GET_ARG1(call);
  411.             arg2 = IPC_GET_ARG2(call);
  412.             screenbuffer_set_style(&conn->screenbuffer,arg1, arg2);
  413.             if (consnum == active_console)
  414.                 set_style_col(arg1, arg2);
  415.                
  416.             break;
  417.         case CONSOLE_CURSOR_VISIBILITY:
  418.             arg1 = IPC_GET_ARG1(call);
  419.             conn->screenbuffer.is_cursor_visible = arg1;
  420.             if (consnum == active_console)
  421.                 curs_visibility(arg1);
  422.             break;
  423.         case CONSOLE_GETCHAR:
  424.             if (keybuffer_empty(&conn->keybuffer)) {
  425.                 /* buffer is empty -> store request */
  426.                 if (conn->keyrequest_counter < MAX_KEYREQUESTS_BUFFERED) {     
  427.                     fifo_push(conn->keyrequests, callid);
  428.                     conn->keyrequest_counter++;
  429.                 } else {
  430.                     /* no key available and too many requests => fail */
  431.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  432.                 }
  433.                 continue;
  434.             };
  435.             keybuffer_pop(&conn->keybuffer, (int *)&arg1);
  436.            
  437.             break;
  438.         }
  439.         ipc_answer_fast(callid, 0, arg1, arg2);
  440.     }
  441. }
  442.  
  443. int main(int argc, char *argv[])
  444. {
  445.     ipcarg_t phonehash;
  446.     int kbd_phone, fb_phone;
  447.     ipcarg_t retval, arg1 = 0xdead, arg2 = 0xbeef;
  448.     int i;
  449.  
  450.     async_set_client_connection(client_connection);
  451.    
  452.     /* Connect to keyboard driver */
  453.  
  454.     while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
  455.         usleep(10000);
  456.     };
  457.    
  458.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  459.         return -1;
  460.     };
  461.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  462.    
  463.     /* Connect to framebuffer driver */
  464.    
  465.     while ((fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
  466.         usleep(10000);
  467.     }
  468.    
  469.     /* Save old kernel screen */
  470.     kernel_pixmap = switch_screens(-1);
  471.  
  472.     /* Initialize gcons */
  473.     gcons_init(fb_info.phone);
  474.     /* Synchronize, the gcons can have something in queue */
  475.     async_req(fb_info.phone, FB_FLUSH, 0, NULL);
  476.     /* Enable double buffering */
  477.     async_msg_2(fb_info.phone, FB_VIEWPORT_DB, (sysarg_t)-1, 1);
  478.    
  479.     async_req_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows), &(fb_info.cols));
  480.     set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  481.     clrscr();
  482.    
  483.     /* Init virtual consoles */
  484.     for (i = 0; i < CONSOLE_COUNT; i++) {
  485.         connections[i].used = 0;
  486.         keybuffer_init(&(connections[i].keybuffer));
  487.        
  488.         connections[i].keyrequests.head = connections[i].keyrequests.tail = 0;
  489.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  490.         connections[i].keyrequest_counter = 0;
  491.        
  492.         if (screenbuffer_init(&(connections[i].screenbuffer), fb_info.cols, fb_info.rows ) == NULL) {
  493.             /*FIXME: handle error */
  494.             return -1;
  495.         }
  496.     }
  497.     connections[KERNEL_CONSOLE].used = 1;
  498.    
  499.     if ((interbuffer = mmap(NULL, sizeof(keyfield_t) * fb_info.cols * fb_info.rows , PROTO_READ|PROTO_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, 0 ,0 )) != NULL) {
  500.         if (async_req_3(fb_info.phone, IPC_M_AS_AREA_SEND, (ipcarg_t)interbuffer, 0, AS_AREA_READ, NULL, NULL, NULL) != 0) {
  501.             munmap(interbuffer, sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  502.             interbuffer = NULL;
  503.         }
  504.     }
  505.  
  506.     curs_goto(0,0);
  507.     curs_visibility(connections[active_console].screenbuffer.is_cursor_visible);
  508.  
  509.     /* Register at NS */
  510.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  511.         return -1;
  512.     };
  513.    
  514.     async_manager();
  515.  
  516.     return 0;  
  517. }
  518.  
  519. /** @}
  520.  */
  521.  
  522.