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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 <ipc/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. #include <sysinfo.h>
  51.  
  52. #include "console.h"
  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(int style)
  128. {
  129.     async_msg_1(fb_info.phone, FB_SET_STYLE, style);
  130. }
  131.  
  132. static void set_color(int fgcolor, int bgcolor, int flags)
  133. {
  134.     async_msg_3(fb_info.phone, FB_SET_COLOR, fgcolor, bgcolor, flags);
  135. }
  136.  
  137. static void set_rgb_color(int fgcolor, int bgcolor)
  138. {
  139.     async_msg_2(fb_info.phone, FB_SET_RGB_COLOR, fgcolor, bgcolor);
  140. }
  141.  
  142. static void set_attrs(attrs_t *attrs)
  143. {
  144.     switch (attrs->t) {
  145.     case at_style:
  146.         set_style(attrs->a.s.style);
  147.         break;
  148.  
  149.     case at_idx:
  150.         set_color(attrs->a.i.fg_color, attrs->a.i.bg_color,
  151.             attrs->a.i.flags);
  152.         break;
  153.  
  154.     case at_rgb:
  155.         set_rgb_color(attrs->a.r.fg_color, attrs->a.r.bg_color);
  156.         break;
  157.     }
  158. }
  159.  
  160. static void prtchr(char c, int row, int col)
  161. {
  162.     async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
  163. }
  164.  
  165. /** Check key and process special keys.
  166.  *
  167.  *
  168.  */
  169. static void write_char(int console, char key)
  170. {
  171.     screenbuffer_t *scr = &(connections[console].screenbuffer);
  172.    
  173.     switch (key) {
  174.     case '\n':
  175.         scr->position_y++;
  176.         scr->position_x = 0;
  177.         break;
  178.     case '\r':
  179.         break;
  180.     case '\t':
  181.         scr->position_x += 8;
  182.         scr->position_x -= scr->position_x % 8;
  183.         break;
  184.     case '\b':
  185.         if (scr->position_x == 0)
  186.             break;
  187.         scr->position_x--;
  188.         if (console == active_console)
  189.             prtchr(' ', scr->position_y, scr->position_x);
  190.         screenbuffer_putchar(scr, ' ');
  191.         break;
  192.     default:   
  193.         if (console == active_console)
  194.             prtchr(key, scr->position_y, scr->position_x);
  195.  
  196.         screenbuffer_putchar(scr, key);
  197.         scr->position_x++;
  198.     }
  199.    
  200.     scr->position_y += (scr->position_x >= scr->size_x);
  201.    
  202.     if (scr->position_y >= scr->size_y) {
  203.         scr->position_y = scr->size_y - 1;
  204.         screenbuffer_clear_line(scr, scr->top_line);
  205.         scr->top_line = (scr->top_line + 1) % scr->size_y;
  206.         if (console == active_console)
  207.             async_msg_1(fb_info.phone, FB_SCROLL, 1);
  208.     }
  209.    
  210.     scr->position_x = scr->position_x % scr->size_x;
  211.    
  212.     if (console == active_console)
  213.         curs_goto(scr->position_y, scr->position_x);
  214.    
  215. }
  216.  
  217. /** Switch to new console */
  218. static void change_console(int newcons)
  219. {
  220.     connection_t *conn;
  221.     int i, j, rc;
  222.     keyfield_t *field;
  223.     attrs_t *attrs;
  224.    
  225.     if (newcons == active_console)
  226.         return;
  227.    
  228.     if (newcons == KERNEL_CONSOLE) {
  229.         async_serialize_start();
  230.         curs_hide_sync();
  231.         gcons_in_kernel();
  232.         async_serialize_end();
  233.        
  234.         if (__SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE)) {
  235.             prev_console = active_console;
  236.             active_console = KERNEL_CONSOLE;
  237.         } else
  238.             newcons = active_console;
  239.     }
  240.    
  241.     if (newcons != KERNEL_CONSOLE) {
  242.         async_serialize_start();
  243.        
  244.         if (active_console == KERNEL_CONSOLE)
  245.             gcons_redraw_console();
  246.        
  247.         active_console = newcons;
  248.         gcons_change_console(newcons);
  249.         conn = &connections[active_console];
  250.        
  251.         set_attrs(&conn->screenbuffer.attrs);
  252.         curs_visibility(false);
  253.         if (interbuffer) {
  254.             for (i = 0; i < conn->screenbuffer.size_x; i++)
  255.                 for (j = 0; j < conn->screenbuffer.size_y; j++) {
  256.                     unsigned int size_x;
  257.                    
  258.                     size_x = conn->screenbuffer.size_x;
  259.                     interbuffer[i + j * size_x] =
  260.                         *get_field_at(&conn->screenbuffer, i, j);
  261.                 }
  262.             /* This call can preempt, but we are already at the end */
  263.             rc = async_req_0_0(fb_info.phone, FB_DRAW_TEXT_DATA);
  264.         }
  265.        
  266.         if ((!interbuffer) || (rc != 0)) {
  267.             set_attrs(&conn->screenbuffer.attrs);
  268.             clrscr();
  269.             attrs = &conn->screenbuffer.attrs;
  270.            
  271.             for (j = 0; j < conn->screenbuffer.size_y; j++)
  272.                 for (i = 0; i < conn->screenbuffer.size_x; i++) {
  273.                     field = get_field_at(&conn->screenbuffer, i, j);
  274.                     if (!attrs_same(*attrs, field->attrs))
  275.                         set_attrs(&field->attrs);
  276.                     attrs = &field->attrs;
  277.                     if ((field->character == ' ') &&
  278.                         (attrs_same(field->attrs,
  279.                         conn->screenbuffer.attrs)))
  280.                         continue;
  281.  
  282.                     prtchr(field->character, j, i);
  283.                 }
  284.         }
  285.        
  286.         curs_goto(conn->screenbuffer.position_y,
  287.             conn->screenbuffer.position_x);
  288.         curs_visibility(conn->screenbuffer.is_cursor_visible);
  289.        
  290.         async_serialize_end();
  291.     }
  292. }
  293.  
  294. /** Handler for keyboard */
  295. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  296. {
  297.     ipc_callid_t callid;
  298.     ipc_call_t call;
  299.     int retval;
  300.     int c;
  301.     connection_t *conn;
  302.     int newcon;
  303.    
  304.     /* Ignore parameters, the connection is alread opened */
  305.     while (1) {
  306.         callid = async_get_call(&call);
  307.         switch (IPC_GET_METHOD(call)) {
  308.         case IPC_M_PHONE_HUNGUP:
  309.             /* TODO: Handle hangup */
  310.             return;
  311.         case KBD_MS_LEFT:
  312.             newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
  313.             if (newcon != -1)
  314.                 change_console(newcon);
  315.             retval = 0;
  316.             break;
  317.         case KBD_MS_MOVE:
  318.             gcons_mouse_move(IPC_GET_ARG1(call),
  319.                 IPC_GET_ARG2(call));
  320.             retval = 0;
  321.             break;
  322.         case KBD_PUSHCHAR:
  323.             /* got key from keyboard driver */
  324.             retval = 0;
  325.             c = IPC_GET_ARG1(call);
  326.             /* switch to another virtual console */
  327.            
  328.             conn = &connections[active_console];
  329. /*
  330.  *          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 +
  331.  *              CONSOLE_COUNT)) {
  332.  */
  333.             if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
  334.                 if (c == 0x112)
  335.                     change_console(KERNEL_CONSOLE);
  336.                 else
  337.                     change_console(c - 0x101);
  338.                 break;
  339.             }
  340.            
  341.             /* if client is awaiting key, send it */
  342.             if (conn->keyrequest_counter > 0) {    
  343.                 conn->keyrequest_counter--;
  344.                 ipc_answer_1(fifo_pop(conn->keyrequests), EOK,
  345.                     c);
  346.                 break;
  347.             }
  348.            
  349.             keybuffer_push(&conn->keybuffer, c);
  350.             retval = 0;
  351.            
  352.             break;
  353.         default:
  354.             retval = ENOENT;
  355.         }
  356.         ipc_answer_0(callid, retval);
  357.     }
  358. }
  359.  
  360. /** Default thread for new connections */
  361. static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  362. {
  363.     ipc_callid_t callid;
  364.     ipc_call_t call;
  365.     int consnum;
  366.     ipcarg_t arg1, arg2, arg3;
  367.     connection_t *conn;
  368.    
  369.     if ((consnum = find_free_connection()) == -1) {
  370.         ipc_answer_0(iid, ELIMIT);
  371.         return;
  372.     }
  373.     conn = &connections[consnum];
  374.     conn->used = 1;
  375.    
  376.     async_serialize_start();
  377.     gcons_notify_connect(consnum);
  378.     conn->client_phone = IPC_GET_ARG5(*icall);
  379.     screenbuffer_clear(&conn->screenbuffer);
  380.    
  381.     /* Accept the connection */
  382.     ipc_answer_0(iid, EOK);
  383.    
  384.     while (1) {
  385.         async_serialize_end();
  386.         callid = async_get_call(&call);
  387.         async_serialize_start();
  388.        
  389.         arg1 = 0;
  390.         arg2 = 0;
  391.         switch (IPC_GET_METHOD(call)) {
  392.         case IPC_M_PHONE_HUNGUP:
  393.             gcons_notify_disconnect(consnum);
  394.            
  395.             /* Answer all pending requests */
  396.             while (conn->keyrequest_counter > 0) {
  397.                 conn->keyrequest_counter--;
  398.                 ipc_answer_0(fifo_pop(conn->keyrequests),
  399.                     ENOENT);
  400.                 break;
  401.             }
  402.             conn->used = 0;
  403.             return;
  404.         case CONSOLE_PUTCHAR:
  405.             write_char(consnum, IPC_GET_ARG1(call));
  406.             gcons_notify_char(consnum);
  407.             break;
  408.         case CONSOLE_CLEAR:
  409.             /* Send message to fb */
  410.             if (consnum == active_console) {
  411.                 async_msg_0(fb_info.phone, FB_CLEAR);
  412.             }
  413.            
  414.             screenbuffer_clear(&conn->screenbuffer);
  415.            
  416.             break;
  417.         case CONSOLE_GOTO:
  418.             screenbuffer_goto(&conn->screenbuffer,
  419.                 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
  420.             if (consnum == active_console)
  421.                 curs_goto(IPC_GET_ARG1(call),
  422.                     IPC_GET_ARG2(call));
  423.             break;
  424.         case CONSOLE_GETSIZE:
  425.             arg1 = fb_info.rows;
  426.             arg2 = fb_info.cols;
  427.             break;
  428.         case CONSOLE_FLUSH:
  429.             if (consnum == active_console)
  430.                 async_req_0_0(fb_info.phone, FB_FLUSH);
  431.             break;
  432.         case CONSOLE_SET_STYLE:
  433.             arg1 = IPC_GET_ARG1(call);
  434.             screenbuffer_set_style(&conn->screenbuffer, arg1);
  435.             if (consnum == active_console)
  436.                 set_style(arg1);
  437.             break;
  438.         case CONSOLE_SET_COLOR:
  439.             arg1 = IPC_GET_ARG1(call);
  440.             arg2 = IPC_GET_ARG2(call);
  441.             arg3 = IPC_GET_ARG3(call);
  442.             screenbuffer_set_color(&conn->screenbuffer, arg1,
  443.                 arg2, arg3);
  444.             if (consnum == active_console)
  445.                 set_color(arg1, arg2, arg3);
  446.             break;
  447.         case CONSOLE_SET_RGB_COLOR:
  448.             arg1 = IPC_GET_ARG1(call);
  449.             arg2 = IPC_GET_ARG2(call);
  450.             screenbuffer_set_rgb_color(&conn->screenbuffer, arg1,
  451.                 arg2);
  452.             if (consnum == active_console)
  453.                 set_rgb_color(arg1, arg2);
  454.             break;
  455.         case CONSOLE_CURSOR_VISIBILITY:
  456.             arg1 = IPC_GET_ARG1(call);
  457.             conn->screenbuffer.is_cursor_visible = arg1;
  458.             if (consnum == active_console)
  459.                 curs_visibility(arg1);
  460.             break;
  461.         case CONSOLE_GETCHAR:
  462.             if (keybuffer_empty(&conn->keybuffer)) {
  463.                 /* buffer is empty -> store request */
  464.                 if (conn->keyrequest_counter <
  465.                     MAX_KEYREQUESTS_BUFFERED) {
  466.                     fifo_push(conn->keyrequests, callid);
  467.                     conn->keyrequest_counter++;
  468.                 } else {
  469.                     /*
  470.                      * No key available and too many
  471.                      * requests => fail.
  472.                     */
  473.                     ipc_answer_0(callid, ELIMIT);
  474.                 }
  475.                 continue;
  476.             }
  477.             int ch;
  478.             keybuffer_pop(&conn->keybuffer, &ch);
  479.             arg1 = ch;
  480.             break;
  481.         }
  482.         ipc_answer_2(callid, EOK, arg1, arg2);
  483.     }
  484. }
  485.  
  486. static void interrupt_received(ipc_callid_t callid, ipc_call_t *call)
  487. {
  488.     change_console(prev_console);
  489. }
  490.  
  491. int main(int argc, char *argv[])
  492. {
  493.     printf(NAME ": HelenOS Console service\n");
  494.    
  495.     ipcarg_t phonehash;
  496.     int kbd_phone;
  497.     size_t ib_size;
  498.     int i;
  499.    
  500.     async_set_client_connection(client_connection);
  501.    
  502.     /* Connect to keyboard driver */
  503.    
  504.     kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  505.     while (kbd_phone < 0) {
  506.         usleep(10000);
  507.         kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
  508.     }
  509.    
  510.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  511.         return -1;
  512.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  513.    
  514.     /* Connect to framebuffer driver */
  515.     fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
  516.     while (fb_info.phone < 0) {
  517.         usleep(10000);
  518.         fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
  519.     }
  520.    
  521.     /* Initialize gcons */
  522.     gcons_init(fb_info.phone);
  523.     /* Synchronize, the gcons can have something in queue */
  524.     async_req_0_0(fb_info.phone, FB_FLUSH);
  525.    
  526.     async_req_0_2(fb_info.phone, FB_GET_CSIZE, &fb_info.rows,
  527.         &fb_info.cols);
  528.     set_rgb_color(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
  529.     clrscr();
  530.    
  531.     /* Init virtual consoles */
  532.     for (i = 0; i < CONSOLE_COUNT; i++) {
  533.         connections[i].used = 0;
  534.         keybuffer_init(&connections[i].keybuffer);
  535.        
  536.         connections[i].keyrequests.head = 0;
  537.         connections[i].keyrequests.tail = 0;
  538.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  539.         connections[i].keyrequest_counter = 0;
  540.        
  541.         if (screenbuffer_init(&connections[i].screenbuffer,
  542.             fb_info.cols, fb_info.rows) == NULL) {
  543.             /* FIXME: handle error */
  544.             return -1;
  545.         }
  546.     }
  547.     connections[KERNEL_CONSOLE].used = 1;
  548.  
  549.     /* Set up shared memory buffer. */
  550.     ib_size = sizeof(keyfield_t) * fb_info.cols * fb_info.rows;
  551.     interbuffer = as_get_mappable_page(ib_size);
  552.  
  553.     if (as_area_create(interbuffer, ib_size, AS_AREA_READ |
  554.         AS_AREA_WRITE | AS_AREA_CACHEABLE) != interbuffer) {
  555.         interbuffer = NULL;
  556.     }
  557.  
  558.     if (interbuffer) {
  559.         if (ipc_share_out_start(fb_info.phone, interbuffer,
  560.             AS_AREA_READ) != EOK) {
  561.             as_area_destroy(interbuffer);
  562.             interbuffer = NULL;
  563.         }
  564.     }
  565.    
  566.     curs_goto(0, 0);
  567.     curs_visibility(
  568.         connections[active_console].screenbuffer.is_cursor_visible);
  569.    
  570.     /* Register at NS */
  571.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
  572.         return -1;
  573.    
  574.     /* Receive kernel notifications */
  575.     if (sysinfo_value("kconsole.present")) {
  576.         int devno = sysinfo_value("kconsole.devno");
  577.         int inr = sysinfo_value("kconsole.inr");
  578.         if (ipc_register_irq(inr, devno, 0, NULL) != EOK)
  579.             printf(NAME ": Error registering kconsole notifications\n");
  580.        
  581.         async_set_interrupt_received(interrupt_received);
  582.     }
  583.    
  584.     // FIXME: avoid connectiong to itself, keep using klog
  585.     // printf(NAME ": Accepting connections\n");
  586.     async_manager();
  587.    
  588.     return 0;
  589. }
  590.  
  591. /** @}
  592.  */
  593.