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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. static int kernel_pixmap = -1;  /**< Number of fb pixmap, where kernel
  90.                  * console is stored */
  91.  
  92.  
  93. /** Find unused virtual console.
  94.  *
  95.  */
  96. static int find_free_connection(void)
  97. {
  98.     int i;
  99.    
  100.     for (i = 0; i < CONSOLE_COUNT; i++) {
  101.         if (!connections[i].used)
  102.             return i;
  103.     }
  104.     return -1;
  105. }
  106.  
  107. static void clrscr(void)
  108. {
  109.     async_msg_0(fb_info.phone, FB_CLEAR);
  110. }
  111.  
  112. static void curs_visibility(int v)
  113. {
  114.     async_msg_1(fb_info.phone, FB_CURSOR_VISIBILITY, v);
  115. }
  116.  
  117. static void curs_goto(int row, int col)
  118. {
  119.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  120. }
  121.  
  122. static void set_style(style_t *style)
  123. {
  124.     async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color,
  125.         style->bg_color);
  126. }
  127.  
  128. static void set_style_col(int fgcolor, int bgcolor)
  129. {
  130.     async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  131. }
  132.  
  133. static void prtchr(char c, int row, int col)
  134. {
  135.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  136. }
  137.  
  138. /** Check key and process special keys.
  139.  *
  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_1(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_0_0(fb_info.phone, FB_VP2PIXMAP);
  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_1(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_0_0(fb_info.phone, FB_DRAW_TEXT_DATA);      
  271.     }
  272.    
  273.     if ((!interbuffer) || (rc != 0)) {
  274.         set_style(&conn->screenbuffer.style);
  275.         clrscr();
  276.         style = &conn->screenbuffer.style;
  277.  
  278.         for (j = 0; j < conn->screenbuffer.size_y; j++)
  279.             for (i = 0; i < conn->screenbuffer.size_x; i++) {
  280.                 field = get_field_at(&conn->screenbuffer, i, 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_1(fifo_pop(conn->keyrequests), EOK,
  352.                     c);
  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_0(callid, retval);
  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_0(iid, ELIMIT);
  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_ARG5(*icall);
  386.     screenbuffer_clear(&conn->screenbuffer);
  387.    
  388.     /* Accept the connection */
  389.     ipc_answer_0(iid, EOK);
  390.  
  391.     while (1) {
  392.         async_serialize_end();
  393.         callid = async_get_call(&call);
  394.         async_serialize_start();
  395.  
  396.         arg1 = 0;
  397.         arg2 = 0;
  398.         switch (IPC_GET_METHOD(call)) {
  399.         case IPC_M_PHONE_HUNGUP:
  400.             gcons_notify_disconnect(consnum);
  401.            
  402.             /* Answer all pending requests */
  403.             while (conn->keyrequest_counter > 0) {     
  404.                 conn->keyrequest_counter--;
  405.                 ipc_answer_0(fifo_pop(conn->keyrequests),
  406.                     ENOENT);
  407.                 break;
  408.             }
  409.             conn->used = 0;
  410.             return;
  411.         case CONSOLE_PUTCHAR:
  412.             write_char(consnum, IPC_GET_ARG1(call));
  413.             gcons_notify_char(consnum);
  414.             break;
  415.         case CONSOLE_CLEAR:
  416.             /* Send message to fb */
  417.             if (consnum == active_console) {
  418.                 async_msg_0(fb_info.phone, FB_CLEAR);
  419.             }
  420.            
  421.             screenbuffer_clear(&conn->screenbuffer);
  422.            
  423.             break;
  424.         case CONSOLE_GOTO:
  425.             screenbuffer_goto(&conn->screenbuffer,
  426.                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  427.             if (consnum == active_console)
  428.                 curs_goto(IPC_GET_ARG1(call),
  429.                     IPC_GET_ARG2(call));
  430.             break;
  431.         case CONSOLE_GETSIZE:
  432.             arg1 = fb_info.rows;
  433.             arg2 = fb_info.cols;
  434.             break;
  435.         case CONSOLE_FLUSH:
  436.             if (consnum == active_console)
  437.                 async_req_0_0(fb_info.phone, FB_FLUSH);
  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,
  443.                 arg2);
  444.             if (consnum == active_console)
  445.                 set_style_col(arg1, arg2);
  446.             break;
  447.         case CONSOLE_CURSOR_VISIBILITY:
  448.             arg1 = IPC_GET_ARG1(call);
  449.             conn->screenbuffer.is_cursor_visible = arg1;
  450.             if (consnum == active_console)
  451.                 curs_visibility(arg1);
  452.             break;
  453.         case CONSOLE_GETCHAR:
  454.             if (keybuffer_empty(&conn->keybuffer)) {
  455.                 /* buffer is empty -> store request */
  456.                 if (conn->keyrequest_counter <
  457.                     MAX_KEYREQUESTS_BUFFERED) {
  458.                     fifo_push(conn->keyrequests, callid);
  459.                     conn->keyrequest_counter++;
  460.                 } else {
  461.                     /*
  462.                      * No key available and too many
  463.                      * requests => fail.
  464.                     */
  465.                     ipc_answer_0(callid, ELIMIT);
  466.                 }
  467.                 continue;
  468.             }
  469.             keybuffer_pop(&conn->keybuffer, (int *) &arg1);
  470.             break;
  471.         }
  472.         ipc_answer_2(callid, EOK, arg1, arg2);
  473.     }
  474. }
  475.  
  476. int main(int argc, char *argv[])
  477. {
  478.     printf(NAME ": HelenOS Console service\n");
  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, 0);
  489.     while (kbd_phone < 0) {
  490.         usleep(10000);
  491.         kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  492.     }
  493.    
  494.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, 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, 0);
  501.     while (fb_info.phone < 0) {
  502.         usleep(10000);
  503.         fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 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_0_0(fb_info.phone, FB_FLUSH);
  513.     /* Enable double buffering */
  514.     async_msg_2(fb_info.phone, FB_VIEWPORT_DB, (sysarg_t) -1, 1);
  515.    
  516.     async_req_0_2(fb_info.phone, FB_GET_CSIZE, &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 (ipc_share_out_start(fb_info.phone, interbuffer,
  544.             AS_AREA_READ) != EOK) {
  545.             munmap(interbuffer,
  546.                 sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  547.             interbuffer = NULL;
  548.         }
  549.     }
  550.  
  551.     curs_goto(0, 0);
  552.     curs_visibility(
  553.         connections[active_console].screenbuffer.is_cursor_visible);
  554.  
  555.     /* Register at NS */
  556.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  557.         return -1;
  558.    
  559.     // FIXME: avoid connectiong to itself, keep using klog
  560.     // printf(NAME ": Accepting connections\n");
  561.     async_manager();
  562.  
  563.     return 0;  
  564. }
  565.  
  566. /** @}
  567.  */
  568.