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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. static void set_style(style_t *style)
  125. {
  126.     async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color,
  127.         style->bg_color);
  128. }
  129.  
  130. static void set_style_col(int fgcolor, int bgcolor)
  131. {
  132.     async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  133. }
  134.  
  135. static void prtchr(char c, int row, int col)
  136. {
  137.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  138. }
  139.  
  140. /** Check key and process special keys.
  141.  *
  142.  * */
  143. static void write_char(int console, char key)
  144. {
  145.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  146.    
  147.     switch (key) {
  148.     case '\n':
  149.         scr->position_y++;
  150.         scr->position_x = 0;
  151.         break;
  152.     case '\r':
  153.         break;
  154.     case '\t':
  155.         scr->position_x += 8;
  156.         scr->position_x -= scr->position_x % 8;
  157.         break;
  158.     case '\b':
  159.         if (scr->position_x == 0)
  160.             break;
  161.         scr->position_x--;
  162.         if (console == active_console)
  163.             prtchr(' ', scr->position_y, scr->position_x);
  164.         screenbuffer_putchar(scr, ' ');
  165.         break;
  166.     default:   
  167.         if (console == active_console)
  168.             prtchr(key, scr->position_y, scr->position_x);
  169.  
  170.         screenbuffer_putchar(scr, key);
  171.         scr->position_x++;
  172.     }
  173.    
  174.     scr->position_y += (scr->position_x >= scr->size_x);
  175.    
  176.     if (scr->position_y >= scr->size_y) {
  177.         scr->position_y = scr->size_y - 1;
  178.         screenbuffer_clear_line(scr, scr->top_line);
  179.         scr->top_line = (scr->top_line + 1) % scr->size_y;
  180.         if (console == active_console)
  181.             async_msg(fb_info.phone, FB_SCROLL, 1);
  182.     }
  183.    
  184.     scr->position_x = scr->position_x % scr->size_x;
  185.    
  186.     if (console == active_console)
  187.         curs_goto(scr->position_y, scr->position_x);
  188.    
  189. }
  190.  
  191. /** Save current screen to pixmap, draw old pixmap
  192.  *
  193.  * @param oldpixmap Old pixmap
  194.  * @return ID of pixmap of current screen
  195.  */
  196. static int switch_screens(int oldpixmap)
  197. {
  198.     int newpmap;
  199.        
  200.     /* Save screen */
  201.     newpmap = async_req(fb_info.phone, FB_VP2PIXMAP, 0, NULL);
  202.     if (newpmap < 0)
  203.         return -1;
  204.  
  205.     if (oldpixmap != -1) {
  206.         /* Show old screen */
  207.         async_msg_2(fb_info.phone, FB_VP_DRAW_PIXMAP, 0, oldpixmap);
  208.         /* Drop old pixmap */
  209.         async_msg(fb_info.phone, FB_DROP_PIXMAP, oldpixmap);
  210.     }
  211.    
  212.     return newpmap;
  213. }
  214.  
  215. /** Switch to new console */
  216. static void change_console(int newcons)
  217. {
  218.     connection_t *conn;
  219.     static int console_pixmap = -1;
  220.     int i, j, rc;
  221.     keyfield_t *field;
  222.     style_t *style;
  223.  
  224.     if (newcons == active_console)
  225.         return;
  226.  
  227.     if (newcons == KERNEL_CONSOLE) {
  228.         if (active_console == KERNEL_CONSOLE)
  229.             return;
  230.         active_console = KERNEL_CONSOLE;
  231.         curs_visibility(0);
  232.  
  233.         async_serialize_start();
  234.         if (kernel_pixmap == -1) {
  235.             /* store/restore unsupported */
  236.             set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  237.             clrscr();
  238.         } else {
  239.             gcons_in_kernel();
  240.             console_pixmap = switch_screens(kernel_pixmap);
  241.             kernel_pixmap = -1;
  242.         }
  243.         async_serialize_end();
  244.  
  245.         __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  246.         return;
  247.     }
  248.    
  249.     async_serialize_start();
  250.  
  251.     if (console_pixmap != -1) {
  252.         kernel_pixmap = switch_screens(console_pixmap);
  253.         console_pixmap = -1;
  254.     }
  255.     active_console = newcons;
  256.     gcons_change_console(newcons);
  257.     conn = &connections[active_console];
  258.  
  259.     set_style(&conn->screenbuffer.style);
  260.     curs_visibility(0);
  261.     if (interbuffer) {
  262.         for (i = 0; i < conn->screenbuffer.size_x; i++)
  263.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  264.                 interbuffer[i + j * conn->screenbuffer.size_x] =
  265.                     *get_field_at(&(conn->screenbuffer),
  266.                     i, j);
  267.         /* This call can preempt, but we are already at the end */
  268.         rc = async_req_2(fb_info.phone, FB_DRAW_TEXT_DATA, 0, 0, NULL,
  269.             NULL);     
  270.     };
  271.    
  272.     if ((!interbuffer) || (rc != 0)) {
  273.         set_style(&conn->screenbuffer.style);
  274.         clrscr();
  275.         style = &conn->screenbuffer.style;
  276.  
  277.         for (j = 0; j < conn->screenbuffer.size_y; j++)
  278.             for (i = 0; i < conn->screenbuffer.size_x; i++) {
  279.                 field = get_field_at(&(conn->screenbuffer), i,
  280.                     j);
  281.                 if (!style_same(*style, field->style))
  282.                     set_style(&field->style);
  283.                 style = &field->style;
  284.                 if ((field->character == ' ') &&
  285.                     (style_same(field->style,
  286.                     conn->screenbuffer.style)))
  287.                     continue;
  288.  
  289.                 prtchr(field->character, j, i);
  290.             }
  291.     }
  292.    
  293.     curs_goto(conn->screenbuffer.position_y,
  294.         conn->screenbuffer.position_x);
  295.     curs_visibility(conn->screenbuffer.is_cursor_visible);
  296.  
  297.     async_serialize_end();
  298. }
  299.  
  300. /** Handler for keyboard */
  301. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  302. {
  303.     ipc_callid_t callid;
  304.     ipc_call_t call;
  305.     int retval;
  306.     int c;
  307.     connection_t *conn;
  308.     int newcon;
  309.    
  310.     /* Ignore parameters, the connection is alread opened */
  311.     while (1) {
  312.         callid = async_get_call(&call);
  313.         switch (IPC_GET_METHOD(call)) {
  314.         case IPC_M_PHONE_HUNGUP:
  315.             /* TODO: Handle hangup */
  316.             return;
  317.         case KBD_MS_LEFT:
  318.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  319.             if (newcon != -1)
  320.                 change_console(newcon);
  321.             retval = 0;
  322.             break;
  323.         case KBD_MS_MOVE:
  324.             gcons_mouse_move(IPC_GET_ARG1(call),
  325.                 IPC_GET_ARG2(call));
  326.             retval = 0;
  327.             break;
  328.         case KBD_PUSHCHAR:
  329.             /* got key from keyboard driver */
  330.            
  331.             retval = 0;
  332.             c = IPC_GET_ARG1(call);
  333.             /* switch to another virtual console */
  334.            
  335.             conn = &connections[active_console];
  336. /*
  337.  *          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 +
  338.  *              CONSOLE_COUNT)) {
  339.  */
  340.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  341.                 if (c == 0x112)
  342.                     change_console(KERNEL_CONSOLE);
  343.                 else
  344.                     change_console(c - 0x101);
  345.                 break;
  346.             }
  347.            
  348.             /* if client is awaiting key, send it */
  349.             if (conn->keyrequest_counter > 0) {    
  350.                 conn->keyrequest_counter--;
  351.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0,
  352.                     c, 0);
  353.                 break;
  354.             }
  355.            
  356.             keybuffer_push(&conn->keybuffer, c);
  357.             retval = 0;
  358.            
  359.             break;
  360.         default:
  361.             retval = ENOENT;
  362.         }
  363.         ipc_answer_fast(callid, retval, 0, 0);
  364.     }
  365. }
  366.  
  367. /** Default thread for new connections */
  368. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  369. {
  370.     ipc_callid_t callid;
  371.     ipc_call_t call;
  372.     int consnum;
  373.     ipcarg_t arg1, arg2;
  374.     connection_t *conn;
  375.  
  376.     if ((consnum = find_free_connection()) == -1) {
  377.         ipc_answer_fast(iid,ELIMIT,0,0);
  378.         return;
  379.     }
  380.     conn = &connections[consnum];
  381.     conn->used = 1;
  382.    
  383.     async_serialize_start();
  384.     gcons_notify_connect(consnum);
  385.     conn->client_phone = IPC_GET_ARG3(call);
  386.     screenbuffer_clear(&conn->screenbuffer);
  387.    
  388.     /* Accept the connection */
  389.     ipc_answer_fast(iid, 0, 0, 0);
  390.  
  391.     while (1) {
  392.         async_serialize_end();
  393.         callid = async_get_call(&call);
  394.         async_serialize_start();
  395.  
  396.         arg1 = arg2 = 0;
  397.         switch (IPC_GET_METHOD(call)) {
  398.         case IPC_M_PHONE_HUNGUP:
  399.             gcons_notify_disconnect(consnum);
  400.            
  401.             /* Answer all pending requests */
  402.             while (conn->keyrequest_counter > 0) {     
  403.                 conn->keyrequest_counter--;
  404.                 ipc_answer_fast(fifo_pop(conn->keyrequests),
  405.                     ENOENT, 0, 0);
  406.                 break;
  407.             }
  408.             conn->used = 0;
  409.             return;
  410.         case CONSOLE_PUTCHAR:
  411.             write_char(consnum, IPC_GET_ARG1(call));
  412.             gcons_notify_char(consnum);
  413.             break;
  414.         case CONSOLE_CLEAR:
  415.             /* Send message to fb */
  416.             if (consnum == active_console) {
  417.                 async_msg(fb_info.phone, FB_CLEAR, 0);
  418.             }
  419.            
  420.             screenbuffer_clear(&conn->screenbuffer);
  421.            
  422.             break;
  423.         case CONSOLE_GOTO:
  424.             screenbuffer_goto(&conn->screenbuffer,
  425.                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  426.             if (consnum == active_console)
  427.                 curs_goto(IPC_GET_ARG1(call),
  428.                     IPC_GET_ARG2(call));
  429.             break;
  430.         case CONSOLE_GETSIZE:
  431.             arg1 = fb_info.rows;
  432.             arg2 = fb_info.cols;
  433.             break;
  434.         case CONSOLE_FLUSH:
  435.             if (consnum == active_console)
  436.                 async_req_2(fb_info.phone, FB_FLUSH, 0, 0,
  437.                     NULL, NULL);       
  438.             break;
  439.         case CONSOLE_SET_STYLE:
  440.             arg1 = IPC_GET_ARG1(call);
  441.             arg2 = IPC_GET_ARG2(call);
  442.             screenbuffer_set_style(&conn->screenbuffer, arg1, arg2);
  443.             if (consnum == active_console)
  444.                 set_style_col(arg1, arg2);
  445.             break;
  446.         case CONSOLE_CURSOR_VISIBILITY:
  447.             arg1 = IPC_GET_ARG1(call);
  448.             conn->screenbuffer.is_cursor_visible = arg1;
  449.             if (consnum == active_console)
  450.                 curs_visibility(arg1);
  451.             break;
  452.         case CONSOLE_GETCHAR:
  453.             if (keybuffer_empty(&conn->keybuffer)) {
  454.                 /* buffer is empty -> store request */
  455.                 if (conn->keyrequest_counter <
  456.                     MAX_KEYREQUESTS_BUFFERED) {
  457.                     fifo_push(conn->keyrequests, callid);
  458.                     conn->keyrequest_counter++;
  459.                 } else {
  460.                     /*
  461.                      * No key available and too many
  462.                      * requests => fail.
  463.                     */
  464.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  465.                 }
  466.                 continue;
  467.             }
  468.             keybuffer_pop(&conn->keybuffer, (int *) &arg1);
  469.             break;
  470.         }
  471.         ipc_answer_fast(callid, 0, arg1, arg2);
  472.     }
  473. }
  474.  
  475. int main(int argc, char *argv[])
  476. {
  477.     ipcarg_t phonehash;
  478.     int kbd_phone;
  479.     int i;
  480.  
  481.     async_set_client_connection(client_connection);
  482.    
  483.     /* Connect to keyboard driver */
  484.  
  485.     kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0);
  486.     while (kbd_phone < 0) {
  487.         usleep(10000);
  488.         kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0);
  489.     }
  490.    
  491.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0)
  492.         return -1;
  493.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  494.    
  495.     /* Connect to framebuffer driver */
  496.    
  497.     fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0);
  498.     while (fb_info.phone < 0) {
  499.         usleep(10000);
  500.         fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0);
  501.     }
  502.    
  503.     /* Save old kernel screen */
  504.     kernel_pixmap = switch_screens(-1);
  505.  
  506.     /* Initialize gcons */
  507.     gcons_init(fb_info.phone);
  508.     /* Synchronize, the gcons can have something in queue */
  509.     async_req(fb_info.phone, FB_FLUSH, 0, NULL);
  510.     /* Enable double buffering */
  511.     async_msg_2(fb_info.phone, FB_VIEWPORT_DB, (sysarg_t) -1, 1);
  512.    
  513.     async_req_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows),
  514.         &(fb_info.cols));
  515.     set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  516.     clrscr();
  517.    
  518.     /* Init virtual consoles */
  519.     for (i = 0; i < CONSOLE_COUNT; i++) {
  520.         connections[i].used = 0;
  521.         keybuffer_init(&(connections[i].keybuffer));
  522.        
  523.         connections[i].keyrequests.head =
  524.             connections[i].keyrequests.tail = 0;
  525.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  526.         connections[i].keyrequest_counter = 0;
  527.        
  528.         if (screenbuffer_init(&(connections[i].screenbuffer),
  529.             fb_info.cols, fb_info.rows) == NULL) {
  530.             /* FIXME: handle error */
  531.             return -1;
  532.         }
  533.     }
  534.     connections[KERNEL_CONSOLE].used = 1;
  535.    
  536.     interbuffer = mmap(NULL,
  537.         sizeof(keyfield_t) * fb_info.cols * fb_info.rows,
  538.         PROTO_READ | PROTO_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
  539.     if (!interbuffer) {
  540.         if (async_req_3(fb_info.phone, IPC_M_AS_AREA_SEND, (ipcarg_t)
  541.             interbuffer, 0, AS_AREA_READ, NULL, NULL, NULL) != 0) {
  542.             munmap(interbuffer, sizeof(keyfield_t) * fb_info.cols
  543.                 * fb_info.rows);
  544.             interbuffer = NULL;
  545.         }
  546.     }
  547.  
  548.     curs_goto(0, 0);
  549.     curs_visibility(connections[active_console].screenbuffer.is_cursor_visible);
  550.  
  551.     /* Register at NS */
  552.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  553.         return -1;
  554.     }
  555.    
  556.     async_manager();
  557.  
  558.     return 0;  
  559. }
  560.  
  561. /** @}
  562.  */
  563.