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  1. /*
  2.  * Copyright (C) 2006 Ondrej Palkovsky
  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. #include <align.h>
  30. #include <async.h>
  31. #include <ipc/ipc.h>
  32. #include <errno.h>
  33. #include <stdio.h>
  34. #include <ddi.h>
  35. #include <sysinfo.h>
  36. #include <as.h>
  37. #include <ipc/fb.h>
  38. #include <ipc/ipc.h>
  39. #include <ipc/ns.h>
  40. #include <ipc/services.h>
  41.  
  42. #include "ega.h"
  43. #include "../console/screenbuffer.h"
  44. #include "main.h"
  45.  
  46. /* Allow only 1 connection */
  47. static int client_connected = 0;
  48.  
  49. static unsigned int scr_width;
  50. static unsigned int scr_height;
  51. static char *scr_addr;
  52.  
  53. static unsigned int style = 0x0f;
  54.  
  55. static void clrscr(void)
  56. {
  57.     int i;
  58.    
  59.     for (i=0; i < scr_width*scr_height; i++) {
  60.         scr_addr[i*2] = ' ';
  61.         scr_addr[i*2+1] = style;
  62.     }
  63. }
  64.  
  65. static void printchar(char c, unsigned int row, unsigned int col)
  66. {
  67.     scr_addr[(row*scr_width + col)*2] = c;
  68.     scr_addr[(row*scr_width + col)*2+1] = style;
  69. }
  70.  
  71. static void draw_text_data(keyfield_t *data)
  72. {
  73.     int i;
  74.  
  75.     for (i=0; i < scr_width*scr_height; i++) {
  76.         scr_addr[i*2] = data[i].character;
  77.         if (data[i].style.fg_color > data[i].style.bg_color)
  78.             scr_addr[i*2+1] = 0x0f;
  79.         else
  80.             scr_addr[i*2+1] = 0xf0;
  81.     }
  82. }
  83.  
  84. static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  85. {
  86.     int retval;
  87.     ipc_callid_t callid;
  88.     ipc_call_t call;
  89.     char c;
  90.     unsigned int row, col;
  91.     int bgcolor,fgcolor;
  92.     keyfield_t *interbuf = NULL;
  93.     size_t intersize = 0;
  94.  
  95.     if (client_connected) {
  96.         ipc_answer_fast(iid, ELIMIT, 0,0);
  97.         return;
  98.     }
  99.     client_connected = 1;
  100.     ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
  101.  
  102.     while (1) {
  103.         callid = async_get_call(&call);
  104.         switch (IPC_GET_METHOD(call)) {
  105.         case IPC_M_PHONE_HUNGUP:
  106.             client_connected = 0;
  107.             ipc_answer_fast(callid,0,0,0);
  108.             return; /* Exit thread */
  109.         case IPC_M_AS_AREA_SEND:
  110.             /* We accept one area for data interchange */
  111.             intersize = IPC_GET_ARG2(call);
  112.             if (intersize >= scr_width*scr_height*sizeof(*interbuf)) {
  113.                 receive_comm_area(callid,&call,(void **)&interbuf);
  114.                 continue;
  115.             }
  116.             retval = EINVAL;
  117.             break;
  118.         case FB_DRAW_TEXT_DATA:
  119.             if (!interbuf) {
  120.                 retval = EINVAL;
  121.                 break;
  122.             }
  123.             draw_text_data(interbuf);
  124.             retval = 0;
  125.             break;
  126.         case FB_GET_CSIZE:
  127.             ipc_answer_fast(callid, 0, scr_height, scr_width);
  128.             continue;
  129.         case FB_CLEAR:
  130.             clrscr();
  131.             retval = 0;
  132.             break;
  133.         case FB_PUTCHAR:
  134.             c = IPC_GET_ARG1(call);
  135.             row = IPC_GET_ARG2(call);
  136.             col = IPC_GET_ARG3(call);
  137.             if (col >= scr_width || row >= scr_height) {
  138.                 retval = EINVAL;
  139.                 break;
  140.             }
  141.             printchar(c,row,col);
  142.             retval = 0;
  143.             break;
  144.         case FB_SET_STYLE:
  145.             fgcolor = IPC_GET_ARG1(call);
  146.             bgcolor = IPC_GET_ARG2(call);
  147.             if (fgcolor > bgcolor)
  148.                 style = 0x0f;
  149.             else
  150.                 style = 0xf0;
  151.         default:
  152.             retval = ENOENT;
  153.         }
  154.         ipc_answer_fast(callid,retval,0,0);
  155.     }
  156. }
  157.  
  158. int ega_init(void)
  159. {
  160.     void *ega_ph_addr;
  161.     size_t sz;
  162.  
  163.  
  164.     ega_ph_addr=(void *)sysinfo_value("fb.address.physical");
  165.     scr_width=sysinfo_value("fb.width");
  166.     scr_height=sysinfo_value("fb.height");
  167.  
  168.     sz = scr_width*scr_height*2;
  169.     scr_addr = as_get_mappable_page(sz);
  170.  
  171.     map_physmem(ega_ph_addr, scr_addr, ALIGN_UP(sz,PAGE_SIZE)>>PAGE_WIDTH,
  172.             AS_AREA_READ | AS_AREA_WRITE);
  173.  
  174.     async_set_client_connection(ega_client_connection);
  175.  
  176.     clrscr();
  177.  
  178.     return 0;
  179. }
  180.