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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.     /** Buffer for unsatisfied request for keys. */
  74.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t,
  75.         MAX_KEYREQUESTS_BUFFERED); 
  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
  79.                      * connected to some client.*/
  80.     screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen
  81.                      * contents and related settings. */
  82. } connection_t;
  83.  
  84. static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual
  85.                          * consoles */
  86. static keyfield_t *interbuffer = NULL;      /**< Pointer to memory shared
  87.                          * with framebufer used for
  88.                          * faster virtual console
  89.                          * switching */
  90.  
  91. static int kernel_pixmap = -1;  /**< Number of fb pixmap, where kernel
  92.                  * console is stored */
  93.  
  94.  
  95. /** Find unused virtual console.
  96.  *
  97.  */
  98. static int find_free_connection(void)
  99. {
  100.     int i;
  101.    
  102.     for (i = 0; i < CONSOLE_COUNT; i++) {
  103.         if (!connections[i].used)
  104.             return i;
  105.     }
  106.     return -1;
  107. }
  108.  
  109. static void clrscr(void)
  110. {
  111.     async_msg(fb_info.phone, FB_CLEAR, 0);
  112. }
  113.  
  114. static void curs_visibility(int v)
  115. {
  116.     async_msg(fb_info.phone, FB_CURSOR_VISIBILITY, v);
  117. }
  118.  
  119. static void curs_goto(int row, int col)
  120. {
  121.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  122.    
  123. }
  124.  
  125. static void set_style(style_t *style)
  126. {
  127.     async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color,
  128.         style->bg_color);
  129. }
  130.  
  131. static void set_style_col(int fgcolor, int bgcolor)
  132. {
  133.     async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  134. }
  135.  
  136. static void prtchr(char c, int row, int col)
  137. {
  138.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  139.    
  140. }
  141.  
  142. /** Check key and process special keys.
  143.  *
  144.  * */
  145. static void write_char(int console, char key)
  146. {
  147.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  148.    
  149.     switch (key) {
  150.     case '\n':
  151.         scr->position_y++;
  152.         scr->position_x = 0;
  153.         break;
  154.     case '\r':
  155.         break;
  156.     case '\t':
  157.         scr->position_x += 8;
  158.         scr->position_x -= scr->position_x % 8;
  159.         break;
  160.     case '\b':
  161.         if (scr->position_x == 0)
  162.             break;
  163.         scr->position_x--;
  164.         if (console == active_console)
  165.             prtchr(' ', scr->position_y, scr->position_x);
  166.         screenbuffer_putchar(scr, ' ');
  167.         break;
  168.     default:   
  169.         if (console == active_console)
  170.             prtchr(key, scr->position_y, scr->position_x);
  171.  
  172.         screenbuffer_putchar(scr, key);
  173.         scr->position_x++;
  174.     }
  175.    
  176.     scr->position_y += (scr->position_x >= scr->size_x);
  177.    
  178.     if (scr->position_y >= scr->size_y) {
  179.         scr->position_y = scr->size_y - 1;
  180.         screenbuffer_clear_line(scr, scr->top_line);
  181.         scr->top_line = (scr->top_line + 1) % scr->size_y;
  182.         if (console == active_console)
  183.             async_msg(fb_info.phone, FB_SCROLL, 1);
  184.     }
  185.    
  186.     scr->position_x = scr->position_x % scr->size_x;
  187.    
  188.     if (console == active_console)
  189.         curs_goto(scr->position_y, scr->position_x);
  190.    
  191. }
  192.  
  193. /** Save current screen to pixmap, draw old pixmap
  194.  *
  195.  * @param oldpixmap Old pixmap
  196.  * @return ID of pixmap of current screen
  197.  */
  198. static int switch_screens(int oldpixmap)
  199. {
  200.     int newpmap;
  201.        
  202.     /* Save screen */
  203.     newpmap = async_req(fb_info.phone, FB_VP2PIXMAP, 0, NULL);
  204.     if (newpmap < 0)
  205.         return -1;
  206.  
  207.     if (oldpixmap != -1) {
  208.         /* Show old screen */
  209.         async_msg_2(fb_info.phone, FB_VP_DRAW_PIXMAP, 0, oldpixmap);
  210.         /* Drop old pixmap */
  211.         async_msg(fb_info.phone, FB_DROP_PIXMAP, oldpixmap);
  212.     }
  213.    
  214.     return newpmap;
  215. }
  216.  
  217. /** Switch to new console */
  218. static void change_console(int newcons)
  219. {
  220.     connection_t *conn;
  221.     static int console_pixmap = -1;
  222.     int i, j, rc;
  223.     keyfield_t *field;
  224.     style_t *style;
  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.         async_serialize_start();
  236.         if (kernel_pixmap == -1) {
  237.             /* store/restore unsupported */
  238.             set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  239.             clrscr();
  240.         } else {
  241.             gcons_in_kernel();
  242.             console_pixmap = switch_screens(kernel_pixmap);
  243.             kernel_pixmap = -1;
  244.         }
  245.         async_serialize_end();
  246.  
  247.         __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  248.         return;
  249.     }
  250.    
  251.     async_serialize_start();
  252.  
  253.     if (console_pixmap != -1) {
  254.         kernel_pixmap = switch_screens(console_pixmap);
  255.         console_pixmap = -1;
  256.     }
  257.     active_console = newcons;
  258.     gcons_change_console(newcons);
  259.     conn = &connections[active_console];
  260.  
  261.     set_style(&conn->screenbuffer.style);
  262.     curs_visibility(0);
  263.     if (interbuffer) {
  264.         for (i = 0; i < conn->screenbuffer.size_x; i++)
  265.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  266.                 interbuffer[i + j * conn->screenbuffer.size_x] =
  267.                     *get_field_at(&(conn->screenbuffer),
  268.                     i, j);
  269.         /* This call can preempt, but we are already at the end */
  270.         rc = async_req_2(fb_info.phone, FB_DRAW_TEXT_DATA, 0, 0, NULL,
  271.             NULL);     
  272.     };
  273.    
  274.     if ((!interbuffer) || (rc != 0)) {
  275.         set_style(&conn->screenbuffer.style);
  276.         clrscr();
  277.         style = &conn->screenbuffer.style;
  278.  
  279.         for (j = 0; j < conn->screenbuffer.size_y; j++)
  280.             for (i = 0; i < conn->screenbuffer.size_x; i++) {
  281.                 field = get_field_at(&(conn->screenbuffer), i,
  282.                     j);
  283.                 if (!style_same(*style, field->style))
  284.                     set_style(&field->style);
  285.                 style = &field->style;
  286.                 if ((field->character == ' ') &&
  287.                     (style_same(field->style,
  288.                     conn->screenbuffer.style)))
  289.                     continue;
  290.  
  291.                 prtchr(field->character, j, i);
  292.             }
  293.     }
  294.    
  295.     curs_goto(conn->screenbuffer.position_y,
  296.         conn->screenbuffer.position_x);
  297.     curs_visibility(conn->screenbuffer.is_cursor_visible);
  298.  
  299.     async_serialize_end();
  300. }
  301.  
  302. /** Handler for keyboard */
  303. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  304. {
  305.     ipc_callid_t callid;
  306.     ipc_call_t call;
  307.     int retval;
  308.     int c;
  309.     connection_t *conn;
  310.     int newcon;
  311.    
  312.     /* Ignore parameters, the connection is alread opened */
  313.     while (1) {
  314.         callid = async_get_call(&call);
  315.         switch (IPC_GET_METHOD(call)) {
  316.         case IPC_M_PHONE_HUNGUP:
  317.             /* TODO: Handle hangup */
  318.             return;
  319.         case KBD_MS_LEFT:
  320.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  321.             if (newcon != -1)
  322.                 change_console(newcon);
  323.             retval = 0;
  324.             break;
  325.         case KBD_MS_MOVE:
  326.             gcons_mouse_move(IPC_GET_ARG1(call),
  327.                 IPC_GET_ARG2(call));
  328.             retval = 0;
  329.             break;
  330.         case KBD_PUSHCHAR:
  331.             /* got key from keyboard driver */
  332.            
  333.             retval = 0;
  334.             c = IPC_GET_ARG1(call);
  335.             /* switch to another virtual console */
  336.            
  337.             conn = &connections[active_console];
  338. /*
  339.  *          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 +
  340.  *              CONSOLE_COUNT)) {
  341.  */
  342.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  343.                 if (c == 0x112)
  344.                     change_console(KERNEL_CONSOLE);
  345.                 else
  346.                     change_console(c - 0x101);
  347.                 break;
  348.             }
  349.            
  350.             /* if client is awaiting key, send it */
  351.             if (conn->keyrequest_counter > 0) {    
  352.                 conn->keyrequest_counter--;
  353.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0,
  354.                     c, 0);
  355.                 break;
  356.             }
  357.            
  358.             keybuffer_push(&conn->keybuffer, c);
  359.             retval = 0;
  360.            
  361.             break;
  362.         default:
  363.             retval = ENOENT;
  364.         }
  365.         ipc_answer_fast(callid, retval, 0, 0);
  366.     }
  367. }
  368.  
  369. /** Default thread for new connections */
  370. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  371. {
  372.     ipc_callid_t callid;
  373.     ipc_call_t call;
  374.     int consnum;
  375.     ipcarg_t arg1, arg2;
  376.     connection_t *conn;
  377.  
  378.     if ((consnum = find_free_connection()) == -1) {
  379.         ipc_answer_fast(iid,ELIMIT,0,0);
  380.         return;
  381.     }
  382.     conn = &connections[consnum];
  383.     conn->used = 1;
  384.    
  385.     async_serialize_start();
  386.     gcons_notify_connect(consnum);
  387.     conn->client_phone = IPC_GET_ARG3(call);
  388.     screenbuffer_clear(&conn->screenbuffer);
  389.    
  390.     /* Accept the connection */
  391.     ipc_answer_fast(iid, 0, 0, 0);
  392.  
  393.     while (1) {
  394.         async_serialize_end();
  395.         callid = async_get_call(&call);
  396.         async_serialize_start();
  397.  
  398.         arg1 = arg2 = 0;
  399.         switch (IPC_GET_METHOD(call)) {
  400.         case IPC_M_PHONE_HUNGUP:
  401.             gcons_notify_disconnect(consnum);
  402.            
  403.             /* Answer all pending requests */
  404.             while (conn->keyrequest_counter > 0) {     
  405.                 conn->keyrequest_counter--;
  406.                 ipc_answer_fast(fifo_pop(conn->keyrequests),
  407.                     ENOENT, 0, 0);
  408.                 break;
  409.             }
  410.             conn->used = 0;
  411.             return;
  412.         case CONSOLE_PUTCHAR:
  413.             write_char(consnum, IPC_GET_ARG1(call));
  414.             gcons_notify_char(consnum);
  415.             break;
  416.         case CONSOLE_CLEAR:
  417.             /* Send message to fb */
  418.             if (consnum == active_console) {
  419.                 async_msg(fb_info.phone, FB_CLEAR, 0);
  420.             }
  421.            
  422.             screenbuffer_clear(&conn->screenbuffer);
  423.            
  424.             break;
  425.         case CONSOLE_GOTO:
  426.             screenbuffer_goto(&conn->screenbuffer,
  427.                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  428.             if (consnum == active_console)
  429.                 curs_goto(IPC_GET_ARG1(call),
  430.                     IPC_GET_ARG2(call));
  431.             break;
  432.         case CONSOLE_GETSIZE:
  433.             arg1 = fb_info.rows;
  434.             arg2 = fb_info.cols;
  435.             break;
  436.         case CONSOLE_FLUSH:
  437.             if (consnum == active_console)
  438.                 async_req_2(fb_info.phone, FB_FLUSH, 0, 0,
  439.                     NULL, NULL);       
  440.             break;
  441.         case CONSOLE_SET_STYLE:
  442.             arg1 = IPC_GET_ARG1(call);
  443.             arg2 = IPC_GET_ARG2(call);
  444.             screenbuffer_set_style(&conn->screenbuffer, arg1, arg2);
  445.             if (consnum == active_console)
  446.                 set_style_col(arg1, arg2);
  447.             break;
  448.         case CONSOLE_CURSOR_VISIBILITY:
  449.             arg1 = IPC_GET_ARG1(call);
  450.             conn->screenbuffer.is_cursor_visible = arg1;
  451.             if (consnum == active_console)
  452.                 curs_visibility(arg1);
  453.             break;
  454.         case CONSOLE_GETCHAR:
  455.             if (keybuffer_empty(&conn->keybuffer)) {
  456.                 /* buffer is empty -> store request */
  457.                 if (conn->keyrequest_counter <
  458.                     MAX_KEYREQUESTS_BUFFERED) {
  459.                     fifo_push(conn->keyrequests, callid);
  460.                     conn->keyrequest_counter++;
  461.                 } else {
  462.                     /*
  463.                      * No key available and too many
  464.                      * requests => fail.
  465.                     */
  466.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  467.                 }
  468.                 continue;
  469.             }
  470.             keybuffer_pop(&conn->keybuffer, (int *) &arg1);
  471.             break;
  472.         }
  473.         ipc_answer_fast(callid, 0, arg1, arg2);
  474.     }
  475. }
  476.  
  477. int main(int argc, char *argv[])
  478. {
  479.     ipcarg_t phonehash;
  480.     int kbd_phone;
  481.     int i;
  482.  
  483.     async_set_client_connection(client_connection);
  484.    
  485.     /* Connect to keyboard driver */
  486.  
  487.     kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0);
  488.     while (kbd_phone < 0) {
  489.         usleep(10000);
  490.         kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0);
  491.     }
  492.    
  493.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0)
  494.         return -1;
  495.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  496.    
  497.     /* Connect to framebuffer driver */
  498.    
  499.     fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0);
  500.     while (fb_info.phone < 0) {
  501.         usleep(10000);
  502.         fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0);
  503.     }
  504.    
  505.     /* Save old kernel screen */
  506.     kernel_pixmap = switch_screens(-1);
  507.  
  508.     /* Initialize gcons */
  509.     gcons_init(fb_info.phone);
  510.     /* Synchronize, the gcons can have something in queue */
  511.     async_req(fb_info.phone, FB_FLUSH, 0, NULL);
  512.     /* Enable double buffering */
  513.     async_msg_2(fb_info.phone, FB_VIEWPORT_DB, (sysarg_t) -1, 1);
  514.    
  515.     async_req_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows),
  516.         &(fb_info.cols));
  517.     set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  518.     clrscr();
  519.    
  520.     /* Init virtual consoles */
  521.     for (i = 0; i < CONSOLE_COUNT; i++) {
  522.         connections[i].used = 0;
  523.         keybuffer_init(&(connections[i].keybuffer));
  524.        
  525.         connections[i].keyrequests.head =
  526.             connections[i].keyrequests.tail = 0;
  527.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  528.         connections[i].keyrequest_counter = 0;
  529.        
  530.         if (screenbuffer_init(&(connections[i].screenbuffer),
  531.             fb_info.cols, fb_info.rows) == NULL) {
  532.             /* FIXME: handle error */
  533.             return -1;
  534.         }
  535.     }
  536.     connections[KERNEL_CONSOLE].used = 1;
  537.    
  538.     interbuffer = mmap(NULL,
  539.         sizeof(keyfield_t) * fb_info.cols * fb_info.rows,
  540.         PROTO_READ | PROTO_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
  541.     if (!interbuffer) {
  542.         if (async_req_3(fb_info.phone, IPC_M_AS_AREA_SEND, (ipcarg_t)
  543.             interbuffer, 0, AS_AREA_READ, NULL, NULL, NULL) != 0) {
  544.             munmap(interbuffer, sizeof(keyfield_t) * fb_info.cols
  545.                 * fb_info.rows);
  546.             interbuffer = NULL;
  547.         }
  548.     }
  549.  
  550.     curs_goto(0, 0);
  551.     curs_visibility(connections[active_console].screenbuffer.is_cursor_visible);
  552.  
  553.     /* Register at NS */
  554.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  555.         return -1;
  556.     }
  557.    
  558.     async_manager();
  559.  
  560.     return 0;  
  561. }
  562.  
  563. /** @}
  564.  */
  565.