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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. #include <libc.h>
  36. #include <fb.h>
  37. #include <ipc/ipc.h>
  38. #include <keys.h>
  39. #include <ipc/fb.h>
  40. #include <ipc/services.h>
  41. #include <errno.h>
  42. #include <key_buffer.h>
  43. #include <console.h>
  44. #include <unistd.h>
  45. #include <async.h>
  46. #include <libadt/fifo.h>
  47. #include <screenbuffer.h>
  48. #include <sys/mman.h>
  49. #include <stdio.h>
  50.  
  51. #include "gcons.h"
  52.  
  53. #define MAX_KEYREQUESTS_BUFFERED 32
  54.  
  55. #define NAME "console"
  56.  
  57. /** Index of currently used virtual console.
  58.  */
  59. int active_console = 0;
  60.  
  61. /** Information about framebuffer
  62.  */
  63. struct {
  64.     int phone;      /**< Framebuffer phone */
  65.     ipcarg_t rows;      /**< Framebuffer rows */
  66.     ipcarg_t cols;      /**< Framebuffer columns */
  67. } fb_info;
  68.  
  69. typedef struct {
  70.     keybuffer_t keybuffer;      /**< Buffer for incoming keys. */
  71.     /** Buffer for unsatisfied request for keys. */
  72.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t,
  73.         MAX_KEYREQUESTS_BUFFERED); 
  74.     int keyrequest_counter;     /**< Number of requests in buffer. */
  75.     int client_phone;       /**< Phone to connected client. */
  76.     int used;           /**< 1 if this virtual console is
  77.                      * connected to some client.*/
  78.     screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen
  79.                      * contents and related settings. */
  80. } connection_t;
  81.  
  82. static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual
  83.                          * consoles */
  84. static keyfield_t *interbuffer = NULL;      /**< Pointer to memory shared
  85.                          * with framebufer used for
  86.                          * faster virtual console
  87.                          * switching */
  88.  
  89.  
  90. /** Find unused virtual console.
  91.  *
  92.  */
  93. static int find_free_connection(void)
  94. {
  95.     int i;
  96.    
  97.     for (i = 0; i < CONSOLE_COUNT; i++) {
  98.         if (!connections[i].used)
  99.             return i;
  100.     }
  101.     return -1;
  102. }
  103.  
  104. static void clrscr(void)
  105. {
  106.     async_msg_0(fb_info.phone, FB_CLEAR);
  107. }
  108.  
  109. static void curs_visibility(int v)
  110. {
  111.     async_msg_1(fb_info.phone, FB_CURSOR_VISIBILITY, v);
  112. }
  113.  
  114. static void curs_goto(int row, int col)
  115. {
  116.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  117. }
  118.  
  119. static void set_style(style_t *style)
  120. {
  121.     async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color,
  122.         style->bg_color);
  123. }
  124.  
  125. static void set_style_col(int fgcolor, int bgcolor)
  126. {
  127.     async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  128. }
  129.  
  130. static void prtchr(char c, int row, int col)
  131. {
  132.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  133. }
  134.  
  135. /** Check key and process special keys.
  136.  *
  137.  *
  138.  */
  139. static void write_char(int console, char key)
  140. {
  141.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  142.    
  143.     switch (key) {
  144.     case '\n':
  145.         scr->position_y++;
  146.         scr->position_x = 0;
  147.         break;
  148.     case '\r':
  149.         break;
  150.     case '\t':
  151.         scr->position_x += 8;
  152.         scr->position_x -= scr->position_x % 8;
  153.         break;
  154.     case '\b':
  155.         if (scr->position_x == 0)
  156.             break;
  157.         scr->position_x--;
  158.         if (console == active_console)
  159.             prtchr(' ', scr->position_y, scr->position_x);
  160.         screenbuffer_putchar(scr, ' ');
  161.         break;
  162.     default:   
  163.         if (console == active_console)
  164.             prtchr(key, scr->position_y, scr->position_x);
  165.  
  166.         screenbuffer_putchar(scr, key);
  167.         scr->position_x++;
  168.     }
  169.    
  170.     scr->position_y += (scr->position_x >= scr->size_x);
  171.    
  172.     if (scr->position_y >= scr->size_y) {
  173.         scr->position_y = scr->size_y - 1;
  174.         screenbuffer_clear_line(scr, scr->top_line);
  175.         scr->top_line = (scr->top_line + 1) % scr->size_y;
  176.         if (console == active_console)
  177.             async_msg_1(fb_info.phone, FB_SCROLL, 1);
  178.     }
  179.    
  180.     scr->position_x = scr->position_x % scr->size_x;
  181.    
  182.     if (console == active_console)
  183.         curs_goto(scr->position_y, scr->position_x);
  184.    
  185. }
  186.  
  187. /** Switch to new console */
  188. static void change_console(int newcons)
  189. {
  190.     connection_t *conn;
  191.     int i, j, rc;
  192.     keyfield_t *field;
  193.     style_t *style;
  194.    
  195.     if (newcons == active_console)
  196.         return;
  197.    
  198.     if (newcons == KERNEL_CONSOLE) {
  199.         async_serialize_start();
  200.         curs_visibility(0);
  201.         gcons_in_kernel();
  202.         async_serialize_end();
  203.        
  204.         if (__SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE))
  205.             active_console = KERNEL_CONSOLE;
  206.         else
  207.             newcons == active_console;
  208.     }
  209.    
  210.     if (newcons != KERNEL_CONSOLE) {
  211.         async_serialize_start();
  212.        
  213.         if (active_console == KERNEL_CONSOLE)
  214.             gcons_redraw_console();
  215.        
  216.         active_console = newcons;
  217.         gcons_change_console(newcons);
  218.         conn = &connections[active_console];
  219.        
  220.         set_style(&conn->screenbuffer.style);
  221.         curs_visibility(0);
  222.         if (interbuffer) {
  223.             for (i = 0; i < conn->screenbuffer.size_x; i++)
  224.                 for (j = 0; j < conn->screenbuffer.size_y; j++) {
  225.                     unsigned int size_x;
  226.                    
  227.                     size_x = conn->screenbuffer.size_x;
  228.                     interbuffer[i + j * size_x] =
  229.                         *get_field_at(&conn->screenbuffer, i, j);
  230.                 }
  231.             /* This call can preempt, but we are already at the end */
  232.             rc = async_req_0_0(fb_info.phone, FB_DRAW_TEXT_DATA);      
  233.         }
  234.        
  235.         if ((!interbuffer) || (rc != 0)) {
  236.             set_style(&conn->screenbuffer.style);
  237.             clrscr();
  238.             style = &conn->screenbuffer.style;
  239.            
  240.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  241.                 for (i = 0; i < conn->screenbuffer.size_x; i++) {
  242.                     field = get_field_at(&conn->screenbuffer, i, j);
  243.                     if (!style_same(*style, field->style))
  244.                         set_style(&field->style);
  245.                     style = &field->style;
  246.                     if ((field->character == ' ') &&
  247.                         (style_same(field->style,
  248.                         conn->screenbuffer.style)))
  249.                         continue;
  250.                    
  251.                     prtchr(field->character, j, i);
  252.                 }
  253.         }
  254.        
  255.         curs_goto(conn->screenbuffer.position_y,
  256.             conn->screenbuffer.position_x);
  257.         curs_visibility(conn->screenbuffer.is_cursor_visible);
  258.        
  259.         async_serialize_end();
  260.     }
  261. }
  262.  
  263. /** Handler for keyboard */
  264. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  265. {
  266.     ipc_callid_t callid;
  267.     ipc_call_t call;
  268.     int retval;
  269.     int c;
  270.     connection_t *conn;
  271.     int newcon;
  272.    
  273.     /* Ignore parameters, the connection is alread opened */
  274.     while (1) {
  275.         callid = async_get_call(&call);
  276.         switch (IPC_GET_METHOD(call)) {
  277.         case IPC_M_PHONE_HUNGUP:
  278.             /* TODO: Handle hangup */
  279.             return;
  280.         case KBD_MS_LEFT:
  281.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  282.             if (newcon != -1)
  283.                 change_console(newcon);
  284.             retval = 0;
  285.             break;
  286.         case KBD_MS_MOVE:
  287.             gcons_mouse_move(IPC_GET_ARG1(call),
  288.                 IPC_GET_ARG2(call));
  289.             retval = 0;
  290.             break;
  291.         case KBD_PUSHCHAR:
  292.             /* got key from keyboard driver */
  293.             retval = 0;
  294.             c = IPC_GET_ARG1(call);
  295.             /* switch to another virtual console */
  296.            
  297.             conn = &connections[active_console];
  298. /*
  299.  *          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 +
  300.  *              CONSOLE_COUNT)) {
  301.  */
  302.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  303.                 if (c == 0x112)
  304.                     change_console(KERNEL_CONSOLE);
  305.                 else
  306.                     change_console(c - 0x101);
  307.                 break;
  308.             }
  309.            
  310.             /* if client is awaiting key, send it */
  311.             if (conn->keyrequest_counter > 0) {    
  312.                 conn->keyrequest_counter--;
  313.                 ipc_answer_1(fifo_pop(conn->keyrequests), EOK,
  314.                     c);
  315.                 break;
  316.             }
  317.            
  318.             keybuffer_push(&conn->keybuffer, c);
  319.             retval = 0;
  320.            
  321.             break;
  322.         default:
  323.             retval = ENOENT;
  324.         }
  325.         ipc_answer_0(callid, retval);
  326.     }
  327. }
  328.  
  329. /** Default thread for new connections */
  330. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  331. {
  332.     ipc_callid_t callid;
  333.     ipc_call_t call;
  334.     int consnum;
  335.     ipcarg_t arg1, arg2;
  336.     connection_t *conn;
  337.  
  338.     if ((consnum = find_free_connection()) == -1) {
  339.         ipc_answer_0(iid, ELIMIT);
  340.         return;
  341.     }
  342.     conn = &connections[consnum];
  343.     conn->used = 1;
  344.    
  345.     async_serialize_start();
  346.     gcons_notify_connect(consnum);
  347.     conn->client_phone = IPC_GET_ARG5(*icall);
  348.     screenbuffer_clear(&conn->screenbuffer);
  349.    
  350.     /* Accept the connection */
  351.     ipc_answer_0(iid, EOK);
  352.  
  353.     while (1) {
  354.         async_serialize_end();
  355.         callid = async_get_call(&call);
  356.         async_serialize_start();
  357.  
  358.         arg1 = 0;
  359.         arg2 = 0;
  360.         switch (IPC_GET_METHOD(call)) {
  361.         case IPC_M_PHONE_HUNGUP:
  362.             gcons_notify_disconnect(consnum);
  363.            
  364.             /* Answer all pending requests */
  365.             while (conn->keyrequest_counter > 0) {     
  366.                 conn->keyrequest_counter--;
  367.                 ipc_answer_0(fifo_pop(conn->keyrequests),
  368.                     ENOENT);
  369.                 break;
  370.             }
  371.             conn->used = 0;
  372.             return;
  373.         case CONSOLE_PUTCHAR:
  374.             write_char(consnum, IPC_GET_ARG1(call));
  375.             gcons_notify_char(consnum);
  376.             break;
  377.         case CONSOLE_CLEAR:
  378.             /* Send message to fb */
  379.             if (consnum == active_console) {
  380.                 async_msg_0(fb_info.phone, FB_CLEAR);
  381.             }
  382.            
  383.             screenbuffer_clear(&conn->screenbuffer);
  384.            
  385.             break;
  386.         case CONSOLE_GOTO:
  387.             screenbuffer_goto(&conn->screenbuffer,
  388.                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  389.             if (consnum == active_console)
  390.                 curs_goto(IPC_GET_ARG1(call),
  391.                     IPC_GET_ARG2(call));
  392.             break;
  393.         case CONSOLE_GETSIZE:
  394.             arg1 = fb_info.rows;
  395.             arg2 = fb_info.cols;
  396.             break;
  397.         case CONSOLE_FLUSH:
  398.             if (consnum == active_console)
  399.                 async_req_0_0(fb_info.phone, FB_FLUSH);
  400.             break;
  401.         case CONSOLE_SET_STYLE:
  402.             arg1 = IPC_GET_ARG1(call);
  403.             arg2 = IPC_GET_ARG2(call);
  404.             screenbuffer_set_style(&conn->screenbuffer, arg1,
  405.                 arg2);
  406.             if (consnum == active_console)
  407.                 set_style_col(arg1, arg2);
  408.             break;
  409.         case CONSOLE_CURSOR_VISIBILITY:
  410.             arg1 = IPC_GET_ARG1(call);
  411.             conn->screenbuffer.is_cursor_visible = arg1;
  412.             if (consnum == active_console)
  413.                 curs_visibility(arg1);
  414.             break;
  415.         case CONSOLE_GETCHAR:
  416.             if (keybuffer_empty(&conn->keybuffer)) {
  417.                 /* buffer is empty -> store request */
  418.                 if (conn->keyrequest_counter <
  419.                     MAX_KEYREQUESTS_BUFFERED) {
  420.                     fifo_push(conn->keyrequests, callid);
  421.                     conn->keyrequest_counter++;
  422.                 } else {
  423.                     /*
  424.                      * No key available and too many
  425.                      * requests => fail.
  426.                     */
  427.                     ipc_answer_0(callid, ELIMIT);
  428.                 }
  429.                 continue;
  430.             }
  431.             int ch;
  432.             keybuffer_pop(&conn->keybuffer, &ch);
  433.             arg1 = ch;
  434.             break;
  435.         }
  436.         ipc_answer_2(callid, EOK, arg1, arg2);
  437.     }
  438. }
  439.  
  440. int main(int argc, char *argv[])
  441. {
  442.     printf(NAME ": HelenOS Console service\n");
  443.    
  444.     ipcarg_t phonehash;
  445.     int kbd_phone;
  446.     int i;
  447.  
  448.     async_set_client_connection(client_connection);
  449.    
  450.     /* Connect to keyboard driver */
  451.  
  452.     kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  453.     while (kbd_phone < 0) {
  454.         usleep(10000);
  455.         kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  456.     }
  457.    
  458.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  459.         return -1;
  460.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  461.    
  462.     /* Connect to framebuffer driver */
  463.     fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
  464.     while (fb_info.phone < 0) {
  465.         usleep(10000);
  466.         fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
  467.     }
  468.    
  469.     /* Initialize gcons */
  470.     gcons_init(fb_info.phone);
  471.     /* Synchronize, the gcons can have something in queue */
  472.     async_req_0_0(fb_info.phone, FB_FLUSH);
  473.    
  474.     async_req_0_2(fb_info.phone, FB_GET_CSIZE, &fb_info.rows,
  475.         &fb_info.cols);
  476.     set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  477.     clrscr();
  478.    
  479.     /* Init virtual consoles */
  480.     for (i = 0; i < CONSOLE_COUNT; i++) {
  481.         connections[i].used = 0;
  482.         keybuffer_init(&connections[i].keybuffer);
  483.        
  484.         connections[i].keyrequests.head = 0;
  485.         connections[i].keyrequests.tail = 0;
  486.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  487.         connections[i].keyrequest_counter = 0;
  488.        
  489.         if (screenbuffer_init(&connections[i].screenbuffer,
  490.             fb_info.cols, fb_info.rows) == NULL) {
  491.             /* FIXME: handle error */
  492.             return -1;
  493.         }
  494.     }
  495.     connections[KERNEL_CONSOLE].used = 1;
  496.    
  497.     interbuffer = mmap(NULL,
  498.         sizeof(keyfield_t) * fb_info.cols * fb_info.rows,
  499.         PROTO_READ | PROTO_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
  500.     if (!interbuffer) {
  501.         if (ipc_share_out_start(fb_info.phone, interbuffer,
  502.             AS_AREA_READ) != EOK) {
  503.             munmap(interbuffer,
  504.                 sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  505.             interbuffer = NULL;
  506.         }
  507.     }
  508.  
  509.     curs_goto(0, 0);
  510.     curs_visibility(
  511.         connections[active_console].screenbuffer.is_cursor_visible);
  512.  
  513.     /* Register at NS */
  514.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  515.         return -1;
  516.    
  517.     // FIXME: avoid connectiong to itself, keep using klog
  518.     // printf(NAME ": Accepting connections\n");
  519.     async_manager();
  520.  
  521.     return 0;  
  522. }
  523.  
  524. /** @}
  525.  */
  526.