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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 <ipc/console.h>
  45. #include <unistd.h>
  46. #include <async.h>
  47. #include <libadt/fifo.h>
  48. #include <screenbuffer.h>
  49. #include <sys/mman.h>
  50. #include <stdio.h>
  51. #include <sysinfo.h>
  52.  
  53. #include "gcons.h"
  54.  
  55. #define MAX_KEYREQUESTS_BUFFERED 32
  56.  
  57. #define NAME "console"
  58.  
  59. /** Index of currently used virtual console.
  60.  */
  61. int active_console = 0;
  62. int prev_console = 0;
  63.  
  64. /** Information about framebuffer
  65.  */
  66. struct {
  67.     int phone;      /**< Framebuffer phone */
  68.     ipcarg_t rows;      /**< Framebuffer rows */
  69.     ipcarg_t cols;      /**< Framebuffer columns */
  70. } fb_info;
  71.  
  72. typedef struct {
  73.     keybuffer_t keybuffer;      /**< Buffer for incoming keys. */
  74.     /** Buffer for unsatisfied request for keys. */
  75.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t,
  76.         MAX_KEYREQUESTS_BUFFERED); 
  77.     int keyrequest_counter;     /**< Number of requests in buffer. */
  78.     int client_phone;       /**< Phone to connected client. */
  79.     int used;           /**< 1 if this virtual console is
  80.                      * connected to some client.*/
  81.     screenbuffer_t screenbuffer;    /**< Screenbuffer for saving screen
  82.                      * contents and related settings. */
  83. } connection_t;
  84.  
  85. static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual
  86.                          * consoles */
  87. static keyfield_t *interbuffer = NULL;      /**< Pointer to memory shared
  88.                          * with framebufer used for
  89.                          * faster virtual console
  90.                          * switching */
  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(bool visible)
  113. {
  114.     async_msg_1(fb_info.phone, FB_CURSOR_VISIBILITY, visible);
  115. }
  116.  
  117. static void curs_hide_sync(void)
  118. {
  119.     ipc_call_sync_1_0(fb_info.phone, FB_CURSOR_VISIBILITY, false);
  120. }
  121.  
  122. static void curs_goto(int row, int col)
  123. {
  124.     async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
  125. }
  126.  
  127. static void set_style(style_t *style)
  128. {
  129.     async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color,
  130.         style->bg_color);
  131. }
  132.  
  133. static void set_style_col(int fgcolor, int bgcolor)
  134. {
  135.     async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
  136. }
  137.  
  138. static void prtchr(char c, int row, int col)
  139. {
  140.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  141. }
  142.  
  143. /** Check key and process special keys.
  144.  *
  145.  *
  146.  */
  147. static void write_char(int console, char key)
  148. {
  149.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  150.    
  151.     switch (key) {
  152.     case '\n':
  153.         scr->position_y++;
  154.         scr->position_x = 0;
  155.         break;
  156.     case '\r':
  157.         break;
  158.     case '\t':
  159.         scr->position_x += 8;
  160.         scr->position_x -= scr->position_x % 8;
  161.         break;
  162.     case '\b':
  163.         if (scr->position_x == 0)
  164.             break;
  165.         scr->position_x--;
  166.         if (console == active_console)
  167.             prtchr(' ', scr->position_y, scr->position_x);
  168.         screenbuffer_putchar(scr, ' ');
  169.         break;
  170.     default:   
  171.         if (console == active_console)
  172.             prtchr(key, scr->position_y, scr->position_x);
  173.  
  174.         screenbuffer_putchar(scr, key);
  175.         scr->position_x++;
  176.     }
  177.    
  178.     scr->position_y += (scr->position_x >= scr->size_x);
  179.    
  180.     if (scr->position_y >= scr->size_y) {
  181.         scr->position_y = scr->size_y - 1;
  182.         screenbuffer_clear_line(scr, scr->top_line);
  183.         scr->top_line = (scr->top_line + 1) % scr->size_y;
  184.         if (console == active_console)
  185.             async_msg_1(fb_info.phone, FB_SCROLL, 1);
  186.     }
  187.    
  188.     scr->position_x = scr->position_x % scr->size_x;
  189.    
  190.     if (console == active_console)
  191.         curs_goto(scr->position_y, scr->position_x);
  192.    
  193. }
  194.  
  195. /** Switch to new console */
  196. static void change_console(int newcons)
  197. {
  198.     connection_t *conn;
  199.     int i, j, rc;
  200.     keyfield_t *field;
  201.     style_t *style;
  202.    
  203.     if (newcons == active_console)
  204.         return;
  205.    
  206.     if (newcons == KERNEL_CONSOLE) {
  207.         async_serialize_start();
  208.         curs_hide_sync();
  209.         gcons_in_kernel();
  210.         async_serialize_end();
  211.        
  212.         if (__SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE)) {
  213.             prev_console = active_console;
  214.             active_console = KERNEL_CONSOLE;
  215.         } else
  216.             newcons = active_console;
  217.     }
  218.    
  219.     if (newcons != KERNEL_CONSOLE) {
  220.         async_serialize_start();
  221.        
  222.         if (active_console == KERNEL_CONSOLE)
  223.             gcons_redraw_console();
  224.        
  225.         active_console = newcons;
  226.         gcons_change_console(newcons);
  227.         conn = &connections[active_console];
  228.        
  229.         set_style(&conn->screenbuffer.style);
  230.         curs_visibility(false);
  231.         if (interbuffer) {
  232.             for (i = 0; i < conn->screenbuffer.size_x; i++)
  233.                 for (j = 0; j < conn->screenbuffer.size_y; j++) {
  234.                     unsigned int size_x;
  235.                    
  236.                     size_x = conn->screenbuffer.size_x;
  237.                     interbuffer[i + j * size_x] =
  238.                         *get_field_at(&conn->screenbuffer, i, j);
  239.                 }
  240.             /* This call can preempt, but we are already at the end */
  241.             rc = async_req_0_0(fb_info.phone, FB_DRAW_TEXT_DATA);
  242.         }
  243.        
  244.         if ((!interbuffer) || (rc != 0)) {
  245.             set_style(&conn->screenbuffer.style);
  246.             clrscr();
  247.             style = &conn->screenbuffer.style;
  248.            
  249.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  250.                 for (i = 0; i < conn->screenbuffer.size_x; i++) {
  251.                     field = get_field_at(&conn->screenbuffer, i, j);
  252.                     if (!style_same(*style, field->style))
  253.                         set_style(&field->style);
  254.                     style = &field->style;
  255.                     if ((field->character == ' ') &&
  256.                         (style_same(field->style,
  257.                         conn->screenbuffer.style)))
  258.                         continue;
  259.                    
  260.                     prtchr(field->character, j, i);
  261.                 }
  262.         }
  263.        
  264.         curs_goto(conn->screenbuffer.position_y,
  265.             conn->screenbuffer.position_x);
  266.         curs_visibility(conn->screenbuffer.is_cursor_visible);
  267.        
  268.         async_serialize_end();
  269.     }
  270. }
  271.  
  272. /** Handler for keyboard */
  273. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  274. {
  275.     ipc_callid_t callid;
  276.     ipc_call_t call;
  277.     int retval;
  278.     int c;
  279.     connection_t *conn;
  280.     int newcon;
  281.    
  282.     /* Ignore parameters, the connection is alread opened */
  283.     while (1) {
  284.         callid = async_get_call(&call);
  285.         switch (IPC_GET_METHOD(call)) {
  286.         case IPC_M_PHONE_HUNGUP:
  287.             /* TODO: Handle hangup */
  288.             return;
  289.         case KBD_MS_LEFT:
  290.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  291.             if (newcon != -1)
  292.                 change_console(newcon);
  293.             retval = 0;
  294.             break;
  295.         case KBD_MS_MOVE:
  296.             gcons_mouse_move(IPC_GET_ARG1(call),
  297.                 IPC_GET_ARG2(call));
  298.             retval = 0;
  299.             break;
  300.         case KBD_PUSHCHAR:
  301.             /* got key from keyboard driver */
  302.             retval = 0;
  303.             c = IPC_GET_ARG1(call);
  304.             /* switch to another virtual console */
  305.            
  306.             conn = &connections[active_console];
  307. /*
  308.  *          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 +
  309.  *              CONSOLE_COUNT)) {
  310.  */
  311.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  312.                 if (c == 0x112)
  313.                     change_console(KERNEL_CONSOLE);
  314.                 else
  315.                     change_console(c - 0x101);
  316.                 break;
  317.             }
  318.            
  319.             /* if client is awaiting key, send it */
  320.             if (conn->keyrequest_counter > 0) {    
  321.                 conn->keyrequest_counter--;
  322.                 ipc_answer_1(fifo_pop(conn->keyrequests), EOK,
  323.                     c);
  324.                 break;
  325.             }
  326.            
  327.             keybuffer_push(&conn->keybuffer, c);
  328.             retval = 0;
  329.            
  330.             break;
  331.         default:
  332.             retval = ENOENT;
  333.         }
  334.         ipc_answer_0(callid, retval);
  335.     }
  336. }
  337.  
  338. /** Default thread for new connections */
  339. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  340. {
  341.     ipc_callid_t callid;
  342.     ipc_call_t call;
  343.     int consnum;
  344.     ipcarg_t arg1, arg2;
  345.     connection_t *conn;
  346.    
  347.     if ((consnum = find_free_connection()) == -1) {
  348.         ipc_answer_0(iid, ELIMIT);
  349.         return;
  350.     }
  351.     conn = &connections[consnum];
  352.     conn->used = 1;
  353.    
  354.     async_serialize_start();
  355.     gcons_notify_connect(consnum);
  356.     conn->client_phone = IPC_GET_ARG5(*icall);
  357.     screenbuffer_clear(&conn->screenbuffer);
  358.    
  359.     /* Accept the connection */
  360.     ipc_answer_0(iid, EOK);
  361.    
  362.     while (1) {
  363.         async_serialize_end();
  364.         callid = async_get_call(&call);
  365.         async_serialize_start();
  366.        
  367.         arg1 = 0;
  368.         arg2 = 0;
  369.         switch (IPC_GET_METHOD(call)) {
  370.         case IPC_M_PHONE_HUNGUP:
  371.             gcons_notify_disconnect(consnum);
  372.            
  373.             /* Answer all pending requests */
  374.             while (conn->keyrequest_counter > 0) {
  375.                 conn->keyrequest_counter--;
  376.                 ipc_answer_0(fifo_pop(conn->keyrequests),
  377.                     ENOENT);
  378.                 break;
  379.             }
  380.             conn->used = 0;
  381.             return;
  382.         case CONSOLE_PUTCHAR:
  383.             write_char(consnum, IPC_GET_ARG1(call));
  384.             gcons_notify_char(consnum);
  385.             break;
  386.         case CONSOLE_CLEAR:
  387.             /* Send message to fb */
  388.             if (consnum == active_console) {
  389.                 async_msg_0(fb_info.phone, FB_CLEAR);
  390.             }
  391.            
  392.             screenbuffer_clear(&conn->screenbuffer);
  393.            
  394.             break;
  395.         case CONSOLE_GOTO:
  396.             screenbuffer_goto(&conn->screenbuffer,
  397.                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  398.             if (consnum == active_console)
  399.                 curs_goto(IPC_GET_ARG1(call),
  400.                     IPC_GET_ARG2(call));
  401.             break;
  402.         case CONSOLE_GETSIZE:
  403.             arg1 = fb_info.rows;
  404.             arg2 = fb_info.cols;
  405.             break;
  406.         case CONSOLE_FLUSH:
  407.             if (consnum == active_console)
  408.                 async_req_0_0(fb_info.phone, FB_FLUSH);
  409.             break;
  410.         case CONSOLE_SET_STYLE:
  411.             arg1 = IPC_GET_ARG1(call);
  412.             arg2 = IPC_GET_ARG2(call);
  413.             screenbuffer_set_style(&conn->screenbuffer, arg1,
  414.                 arg2);
  415.             if (consnum == active_console)
  416.                 set_style_col(arg1, arg2);
  417.             break;
  418.         case CONSOLE_CURSOR_VISIBILITY:
  419.             arg1 = IPC_GET_ARG1(call);
  420.             conn->screenbuffer.is_cursor_visible = arg1;
  421.             if (consnum == active_console)
  422.                 curs_visibility(arg1);
  423.             break;
  424.         case CONSOLE_GETCHAR:
  425.             if (keybuffer_empty(&conn->keybuffer)) {
  426.                 /* buffer is empty -> store request */
  427.                 if (conn->keyrequest_counter <
  428.                     MAX_KEYREQUESTS_BUFFERED) {
  429.                     fifo_push(conn->keyrequests, callid);
  430.                     conn->keyrequest_counter++;
  431.                 } else {
  432.                     /*
  433.                      * No key available and too many
  434.                      * requests => fail.
  435.                     */
  436.                     ipc_answer_0(callid, ELIMIT);
  437.                 }
  438.                 continue;
  439.             }
  440.             int ch;
  441.             keybuffer_pop(&conn->keybuffer, &ch);
  442.             arg1 = ch;
  443.             break;
  444.         }
  445.         ipc_answer_2(callid, EOK, arg1, arg2);
  446.     }
  447. }
  448.  
  449. static void interrupt_received(ipc_callid_t callid, ipc_call_t *call)
  450. {
  451.     change_console(prev_console);
  452. }
  453.  
  454. int main(int argc, char *argv[])
  455. {
  456.     printf(NAME ": HelenOS Console service\n");
  457.    
  458.     ipcarg_t phonehash;
  459.     int kbd_phone;
  460.     int i;
  461.    
  462.     async_set_client_connection(client_connection);
  463.    
  464.     /* Connect to keyboard driver */
  465.    
  466.     kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  467.     while (kbd_phone < 0) {
  468.         usleep(10000);
  469.         kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  470.     }
  471.    
  472.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  473.         return -1;
  474.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  475.    
  476.     /* Connect to framebuffer driver */
  477.     fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
  478.     while (fb_info.phone < 0) {
  479.         usleep(10000);
  480.         fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
  481.     }
  482.    
  483.     /* Initialize gcons */
  484.     gcons_init(fb_info.phone);
  485.     /* Synchronize, the gcons can have something in queue */
  486.     async_req_0_0(fb_info.phone, FB_FLUSH);
  487.    
  488.     async_req_0_2(fb_info.phone, FB_GET_CSIZE, &fb_info.rows,
  489.         &fb_info.cols);
  490.     set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  491.     clrscr();
  492.    
  493.     /* Init virtual consoles */
  494.     for (i = 0; i < CONSOLE_COUNT; i++) {
  495.         connections[i].used = 0;
  496.         keybuffer_init(&connections[i].keybuffer);
  497.        
  498.         connections[i].keyrequests.head = 0;
  499.         connections[i].keyrequests.tail = 0;
  500.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  501.         connections[i].keyrequest_counter = 0;
  502.        
  503.         if (screenbuffer_init(&connections[i].screenbuffer,
  504.             fb_info.cols, fb_info.rows) == NULL) {
  505.             /* FIXME: handle error */
  506.             return -1;
  507.         }
  508.     }
  509.     connections[KERNEL_CONSOLE].used = 1;
  510.    
  511.     interbuffer = mmap(NULL,
  512.         sizeof(keyfield_t) * fb_info.cols * fb_info.rows,
  513.         PROTO_READ | PROTO_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
  514.     if (!interbuffer) {
  515.         if (ipc_share_out_start(fb_info.phone, interbuffer,
  516.             AS_AREA_READ) != EOK) {
  517.             munmap(interbuffer,
  518.                 sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
  519.             interbuffer = NULL;
  520.         }
  521.     }
  522.    
  523.     curs_goto(0, 0);
  524.     curs_visibility(
  525.         connections[active_console].screenbuffer.is_cursor_visible);
  526.    
  527.     /* Register at NS */
  528.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  529.         return -1;
  530.    
  531.     /* Receive kernel notifications */
  532.     if (sysinfo_value("kconsole.present")) {
  533.         int devno = sysinfo_value("kconsole.devno");
  534.         int inr = sysinfo_value("kconsole.inr");
  535.         if (ipc_register_irq(inr, devno, 0, NULL) != EOK)
  536.             printf(NAME ": Error registering kconsole notifications\n");
  537.        
  538.         async_set_interrupt_received(interrupt_received);
  539.     }
  540.    
  541.     // FIXME: avoid connectiong to itself, keep using klog
  542.     // printf(NAME ": Accepting connections\n");
  543.     async_manager();
  544.    
  545.     return 0;
  546. }
  547.  
  548. /** @}
  549.  */
  550.