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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. typedef struct {
  71.     keybuffer_t keybuffer;      /**< Buffer for incoming keys. */
  72.     /** Buffer for unsatisfied request for keys. */
  73.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t,
  74.         MAX_KEYREQUESTS_BUFFERED); 
  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
  78.                      * connected to some client.*/
  79.     screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen
  80.                      * contents and related settings. */
  81. } connection_t;
  82.  
  83. static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual
  84.                          * consoles */
  85. static keyfield_t *interbuffer = NULL;      /**< Pointer to memory shared
  86.                          * with framebufer used for
  87.                          * faster virtual console
  88.                          * switching */
  89.  
  90. static int kernel_pixmap = -1;  /**< Number of fb pixmap, where kernel
  91.                  * console is stored */
  92.  
  93.  
  94. /** Find unused virtual console.
  95.  *
  96.  */
  97. static int find_free_connection(void)
  98. {
  99.     int i;
  100.    
  101.     for (i = 0; i < CONSOLE_COUNT; i++) {
  102.         if (!connections[i].used)
  103.             return i;
  104.     }
  105.     return -1;
  106. }
  107.  
  108. static void clrscr(void)
  109. {
  110.     async_msg(fb_info.phone, FB_CLEAR, 0);
  111. }
  112.  
  113. static void curs_visibility(int v)
  114. {
  115.     async_msg(fb_info.phone, FB_CURSOR_VISIBILITY, v);
  116. }
  117.  
  118. static void curs_goto(int row, int col)
  119. {
  120.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  121. }
  122.  
  123. static void set_style(style_t *style)
  124. {
  125.     async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color,
  126.         style->bg_color);
  127. }
  128.  
  129. static void set_style_col(int fgcolor, int bgcolor)
  130. {
  131.     async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  132. }
  133.  
  134. static void prtchr(char c, int row, int col)
  135. {
  136.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  137. }
  138.  
  139. /** Check key and process special keys.
  140.  *
  141.  * */
  142. static void write_char(int console, char key)
  143. {
  144.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  145.    
  146.     switch (key) {
  147.     case '\n':
  148.         scr->position_y++;
  149.         scr->position_x = 0;
  150.         break;
  151.     case '\r':
  152.         break;
  153.     case '\t':
  154.         scr->position_x += 8;
  155.         scr->position_x -= scr->position_x % 8;
  156.         break;
  157.     case '\b':
  158.         if (scr->position_x == 0)
  159.             break;
  160.         scr->position_x--;
  161.         if (console == active_console)
  162.             prtchr(' ', scr->position_y, scr->position_x);
  163.         screenbuffer_putchar(scr, ' ');
  164.         break;
  165.     default:   
  166.         if (console == active_console)
  167.             prtchr(key, scr->position_y, scr->position_x);
  168.  
  169.         screenbuffer_putchar(scr, key);
  170.         scr->position_x++;
  171.     }
  172.    
  173.     scr->position_y += (scr->position_x >= scr->size_x);
  174.    
  175.     if (scr->position_y >= scr->size_y) {
  176.         scr->position_y = scr->size_y - 1;
  177.         screenbuffer_clear_line(scr, scr->top_line);
  178.         scr->top_line = (scr->top_line + 1) % scr->size_y;
  179.         if (console == active_console)
  180.             async_msg(fb_info.phone, FB_SCROLL, 1);
  181.     }
  182.    
  183.     scr->position_x = scr->position_x % scr->size_x;
  184.    
  185.     if (console == active_console)
  186.         curs_goto(scr->position_y, scr->position_x);
  187.    
  188. }
  189.  
  190. /** Save current screen to pixmap, draw old pixmap
  191.  *
  192.  * @param oldpixmap Old pixmap
  193.  * @return ID of pixmap of current screen
  194.  */
  195. static int switch_screens(int oldpixmap)
  196. {
  197.     int newpmap;
  198.        
  199.     /* Save screen */
  200.     newpmap = async_req(fb_info.phone, FB_VP2PIXMAP, 0, NULL);
  201.     if (newpmap < 0)
  202.         return -1;
  203.  
  204.     if (oldpixmap != -1) {
  205.         /* Show old screen */
  206.         async_msg_2(fb_info.phone, FB_VP_DRAW_PIXMAP, 0, oldpixmap);
  207.         /* Drop old pixmap */
  208.         async_msg(fb_info.phone, FB_DROP_PIXMAP, oldpixmap);
  209.     }
  210.    
  211.     return newpmap;
  212. }
  213.  
  214. /** Switch to new console */
  215. static void change_console(int newcons)
  216. {
  217.     connection_t *conn;
  218.     static int console_pixmap = -1;
  219.     int i, j, rc;
  220.     keyfield_t *field;
  221.     style_t *style;
  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.         async_serialize_start();
  233.         if (kernel_pixmap == -1) {
  234.             /* store/restore unsupported */
  235.             set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  236.             clrscr();
  237.         } else {
  238.             gcons_in_kernel();
  239.             console_pixmap = switch_screens(kernel_pixmap);
  240.             kernel_pixmap = -1;
  241.         }
  242.         async_serialize_end();
  243.  
  244.         __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
  245.         return;
  246.     }
  247.    
  248.     async_serialize_start();
  249.  
  250.     if (console_pixmap != -1) {
  251.         kernel_pixmap = switch_screens(console_pixmap);
  252.         console_pixmap = -1;
  253.     }
  254.     active_console = newcons;
  255.     gcons_change_console(newcons);
  256.     conn = &connections[active_console];
  257.  
  258.     set_style(&conn->screenbuffer.style);
  259.     curs_visibility(0);
  260.     if (interbuffer) {
  261.         for (i = 0; i < conn->screenbuffer.size_x; i++)
  262.             for (j = 0; j < conn->screenbuffer.size_y; j++) {
  263.                 unsigned int size_x;
  264.  
  265.                 size_x = conn->screenbuffer.size_x;
  266.                 interbuffer[i + j * size_x] =
  267.                     *get_field_at(&conn->screenbuffer, i, j);
  268.             }
  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,
  445.                 arg2);
  446.             if (consnum == active_console)
  447.                 set_style_col(arg1, arg2);
  448.             break;
  449.         case CONSOLE_CURSOR_VISIBILITY:
  450.             arg1 = IPC_GET_ARG1(call);
  451.             conn->screenbuffer.is_cursor_visible = arg1;
  452.             if (consnum == active_console)
  453.                 curs_visibility(arg1);
  454.             break;
  455.         case CONSOLE_GETCHAR:
  456.             if (keybuffer_empty(&conn->keybuffer)) {
  457.                 /* buffer is empty -> store request */
  458.                 if (conn->keyrequest_counter <
  459.                     MAX_KEYREQUESTS_BUFFERED) {
  460.                     fifo_push(conn->keyrequests, callid);
  461.                     conn->keyrequest_counter++;
  462.                 } else {
  463.                     /*
  464.                      * No key available and too many
  465.                      * requests => fail.
  466.                     */
  467.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  468.                 }
  469.                 continue;
  470.             }
  471.             keybuffer_pop(&conn->keybuffer, (int *) &arg1);
  472.             break;
  473.         }
  474.         ipc_answer_fast(callid, 0, arg1, arg2);
  475.     }
  476. }
  477.  
  478. int main(int argc, char *argv[])
  479. {
  480.     ipcarg_t phonehash;
  481.     int kbd_phone;
  482.     int i;
  483.  
  484.     async_set_client_connection(client_connection);
  485.    
  486.     /* Connect to keyboard driver */
  487.  
  488.     kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0);
  489.     while (kbd_phone < 0) {
  490.         usleep(10000);
  491.         kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0);
  492.     }
  493.    
  494.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0)
  495.         return -1;
  496.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  497.    
  498.     /* Connect to framebuffer driver */
  499.    
  500.     fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0);
  501.     while (fb_info.phone < 0) {
  502.         usleep(10000);
  503.         fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0);
  504.     }
  505.    
  506.     /* Save old kernel screen */
  507.     kernel_pixmap = switch_screens(-1);
  508.  
  509.     /* Initialize gcons */
  510.     gcons_init(fb_info.phone);
  511.     /* Synchronize, the gcons can have something in queue */
  512.     async_req(fb_info.phone, FB_FLUSH, 0, NULL);
  513.     /* Enable double buffering */
  514.     async_msg_2(fb_info.phone, FB_VIEWPORT_DB, (sysarg_t) -1, 1);
  515.    
  516.     async_req_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &fb_info.rows,
  517.         &fb_info.cols);
  518.     set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  519.     clrscr();
  520.    
  521.     /* Init virtual consoles */
  522.     for (i = 0; i < CONSOLE_COUNT; i++) {
  523.         connections[i].used = 0;
  524.         keybuffer_init(&connections[i].keybuffer);
  525.        
  526.         connections[i].keyrequests.head = 0;
  527.         connections[i].keyrequests.tail = 0;
  528.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  529.         connections[i].keyrequest_counter = 0;
  530.        
  531.         if (screenbuffer_init(&connections[i].screenbuffer,
  532.             fb_info.cols, fb_info.rows) == NULL) {
  533.             /* FIXME: handle error */
  534.             return -1;
  535.         }
  536.     }
  537.     connections[KERNEL_CONSOLE].used = 1;
  538.    
  539.     interbuffer = mmap(NULL,
  540.         sizeof(keyfield_t) * fb_info.cols * fb_info.rows,
  541.         PROTO_READ | PROTO_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
  542.     if (!interbuffer) {
  543.         if (async_req_3(fb_info.phone, IPC_M_AS_AREA_SEND,
  544.             (ipcarg_t) interbuffer, 0, AS_AREA_READ, NULL, NULL,
  545.             NULL) != 0) {
  546.             munmap(interbuffer,
  547.                 sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  548.             interbuffer = NULL;
  549.         }
  550.     }
  551.  
  552.     curs_goto(0, 0);
  553.     curs_visibility(
  554.         connections[active_console].screenbuffer.is_cursor_visible);
  555.  
  556.     /* Register at NS */
  557.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  558.         return -1;
  559.     }
  560.    
  561.     async_manager();
  562.  
  563.     return 0;  
  564. }
  565.  
  566. /** @}
  567.  */
  568.