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