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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. /** @defgroup egafb EGA framebuffer
  30.  * @brief   HelenOS EGA framebuffer.
  31.  * @ingroup fbs
  32.  * @{
  33.  */
  34. /** @file
  35.  */
  36.  
  37.  
  38. #include <stdlib.h>
  39. #include <unistd.h>
  40. #include <align.h>
  41. #include <async.h>
  42. #include <ipc/ipc.h>
  43. #include <errno.h>
  44. #include <stdio.h>
  45. #include <ddi.h>
  46. #include <sysinfo.h>
  47. #include <as.h>
  48. #include <ipc/fb.h>
  49. #include <ipc/ipc.h>
  50. #include <ipc/ns.h>
  51. #include <ipc/services.h>
  52. #include <libarch/ddi.h>
  53.  
  54. #include "ega.h"
  55. #include "../console/screenbuffer.h"
  56. #include "main.h"
  57.  
  58. #define MAX_SAVED_SCREENS 256
  59. typedef struct saved_screen {
  60.     short *data;
  61. } saved_screen;
  62.  
  63. saved_screen saved_screens[MAX_SAVED_SCREENS];
  64.  
  65.  
  66. #define EGA_IO_ADDRESS 0x3d4
  67. #define EGA_IO_SIZE 2
  68.  
  69. #define NORMAL_COLOR       0x0f
  70. #define INVERTED_COLOR     0xf0
  71.  
  72. #define EGA_STYLE(fg,bg) ((fg) > (bg) ? NORMAL_COLOR : INVERTED_COLOR)
  73.  
  74. /* Allow only 1 connection */
  75. static int client_connected = 0;
  76.  
  77. static unsigned int scr_width;
  78. static unsigned int scr_height;
  79. static char *scr_addr;
  80.  
  81. static unsigned int style = NORMAL_COLOR;
  82.  
  83. static void clrscr(void)
  84. {
  85.     int i;
  86.    
  87.     for (i=0; i < scr_width*scr_height; i++) {
  88.         scr_addr[i*2] = ' ';
  89.         scr_addr[i*2+1] = style;
  90.     }
  91. }
  92.  
  93. static void cursor_goto(unsigned int row, unsigned int col)
  94. {
  95.     int ega_cursor;
  96.  
  97.     ega_cursor=col+scr_width*row;
  98.    
  99.     outb(EGA_IO_ADDRESS    , 0xe);
  100.     outb(EGA_IO_ADDRESS + 1, (ega_cursor >>8) & 0xff);
  101.     outb(EGA_IO_ADDRESS    , 0xf);
  102.     outb(EGA_IO_ADDRESS + 1, ega_cursor & 0xff);
  103. }
  104.  
  105. static void cursor_disable(void)
  106. {
  107.     uint8_t stat;
  108.  
  109.     outb(EGA_IO_ADDRESS , 0xa);
  110.     stat=inb(EGA_IO_ADDRESS + 1);
  111.     outb(EGA_IO_ADDRESS , 0xa);
  112.     outb(EGA_IO_ADDRESS +1 ,stat | (1<<5) );
  113. }
  114.  
  115. static void cursor_enable(void)
  116. {
  117.     uint8_t stat;
  118.  
  119.     outb(EGA_IO_ADDRESS , 0xa);
  120.     stat=inb(EGA_IO_ADDRESS + 1);
  121.     outb(EGA_IO_ADDRESS , 0xa);
  122.     outb(EGA_IO_ADDRESS +1 ,stat & (~(1<<5)) );
  123. }
  124.  
  125. static void scroll(int rows)
  126. {
  127.     int i;
  128.     if (rows > 0) {
  129.         memcpy (scr_addr,((char *)scr_addr) + rows * scr_width * 2, scr_width * scr_height * 2 - rows * scr_width * 2);
  130.         for (i = 0; i < rows * scr_width ; i ++)
  131.             (((short *)scr_addr) + scr_width * scr_height - rows * scr_width) [i] = ((style << 8) + ' ');
  132.     } else if (rows < 0) {
  133.  
  134.         memcpy (((char *)scr_addr) - rows * scr_width * 2 ,scr_addr ,scr_width * scr_height * 2 + rows * scr_width * 2);
  135.         for (i = 0; i < - rows * scr_width ; i++)
  136.             ((short *)scr_addr) [i] = ((style << 8 ) + ' ');
  137.     }
  138. }
  139.  
  140. static void printchar(char c, unsigned int row, unsigned int col)
  141. {
  142.     scr_addr[(row*scr_width + col)*2] = c;
  143.     scr_addr[(row*scr_width + col)*2+1] = style;
  144.    
  145.     cursor_goto(row,col+1);
  146. }
  147.  
  148. static void draw_text_data(keyfield_t *data)
  149. {
  150.     int i;
  151.  
  152.     for (i=0; i < scr_width*scr_height; i++) {
  153.         scr_addr[i*2] = data[i].character;
  154.         scr_addr[i*2+1] = EGA_STYLE(data[i].style.fg_color, data[i].style.bg_color);
  155.     }
  156. }
  157.  
  158. static int save_screen(void)
  159. {
  160.     int i;
  161.  
  162.     for (i=0; ( i < MAX_SAVED_SCREENS ) && (saved_screens[i].data); i++)
  163.         ;
  164.     if (i == MAX_SAVED_SCREENS)
  165.         return EINVAL;
  166.     if (!(saved_screens[i].data=malloc( 2 * scr_width*scr_height )))
  167.         return ENOMEM;
  168.     memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
  169.  
  170.     return i;
  171. }
  172.  
  173. static int print_screen(int i)
  174. {
  175.     if (saved_screens[i].data)
  176.         memcpy(scr_addr, saved_screens[i].data, 2 * scr_width * scr_height);
  177.     else return EINVAL;
  178.     return i;
  179. }
  180.  
  181.  
  182. static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
  183. {
  184.     int retval;
  185.     ipc_callid_t callid;
  186.     ipc_call_t call;
  187.     char c;
  188.     unsigned int row, col;
  189.     int bgcolor,fgcolor;
  190.     keyfield_t *interbuf = NULL;
  191.     size_t intersize = 0;
  192.     int i;
  193.  
  194.     if (client_connected) {
  195.         ipc_answer_fast(iid, ELIMIT, 0,0);
  196.         return;
  197.     }
  198.     client_connected = 1;
  199.     ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
  200.  
  201.     while (1) {
  202.         callid = async_get_call(&call);
  203.         switch (IPC_GET_METHOD(call)) {
  204.         case IPC_M_PHONE_HUNGUP:
  205.             client_connected = 0;
  206.             ipc_answer_fast(callid,0,0,0);
  207.             return; /* Exit thread */
  208.         case IPC_M_AS_AREA_SEND:
  209.             /* We accept one area for data interchange */
  210.             intersize = IPC_GET_ARG2(call);
  211.             if (intersize >= scr_width*scr_height*sizeof(*interbuf)) {
  212.                 receive_comm_area(callid,&call,(void *)&interbuf);
  213.                 continue;
  214.             }
  215.             retval = EINVAL;
  216.             break;
  217.         case FB_DRAW_TEXT_DATA:
  218.             if (!interbuf) {
  219.                 retval = EINVAL;
  220.                 break;
  221.             }
  222.             draw_text_data(interbuf);
  223.             retval = 0;
  224.             break;
  225.         case FB_GET_CSIZE:
  226.             ipc_answer_fast(callid, 0, scr_height, scr_width);
  227.             continue;
  228.         case FB_CLEAR:
  229.             clrscr();
  230.             retval = 0;
  231.             break;
  232.         case FB_PUTCHAR:
  233.             c = IPC_GET_ARG1(call);
  234.             row = IPC_GET_ARG2(call);
  235.             col = IPC_GET_ARG3(call);
  236.             if (col >= scr_width || row >= scr_height) {
  237.                 retval = EINVAL;
  238.                 break;
  239.             }
  240.             printchar(c,row,col);
  241.             retval = 0;
  242.             break;
  243.         case FB_CURSOR_GOTO:
  244.             row = IPC_GET_ARG1(call);
  245.             col = IPC_GET_ARG2(call);
  246.             if (row >= scr_height || col >= scr_width) {
  247.                 retval = EINVAL;
  248.                 break;
  249.             }
  250.             cursor_goto(row,col);
  251.             retval = 0;
  252.             break;
  253.         case FB_SCROLL:
  254.             i = IPC_GET_ARG1(call);
  255.             if (i > scr_height || i < (- (int)scr_height)) {
  256.                 retval = EINVAL;
  257.                 break;
  258.             }
  259.             scroll(i);
  260.             retval = 0;
  261.             break;
  262.         case FB_CURSOR_VISIBILITY:
  263.             if(IPC_GET_ARG1(call))
  264.                 cursor_enable();
  265.             else
  266.                 cursor_disable();
  267.             retval = 0;
  268.             break;
  269.         case FB_SET_STYLE:
  270.             fgcolor = IPC_GET_ARG1(call);
  271.             bgcolor = IPC_GET_ARG2(call);
  272.             style = EGA_STYLE(fgcolor, bgcolor);
  273.             retval = 0;
  274.             break;
  275.         case FB_VP_DRAW_PIXMAP:
  276.             i = IPC_GET_ARG2(call);
  277.             retval = print_screen(i);
  278.             break;
  279.         case FB_VP2PIXMAP:
  280.             retval = save_screen();
  281.             break;
  282.         case FB_DROP_PIXMAP:
  283.             i = IPC_GET_ARG1(call);
  284.             if (i >= MAX_SAVED_SCREENS) {
  285.                 retval = EINVAL;
  286.                 break;
  287.             }
  288.             if (saved_screens[i].data) {
  289.                 free(saved_screens[i].data);
  290.                 saved_screens[i].data = NULL;
  291.             }
  292.             retval = 0;
  293.             break;
  294.  
  295.         default:
  296.             retval = ENOENT;
  297.         }
  298.         ipc_answer_fast(callid,retval,0,0);
  299.     }
  300. }
  301.  
  302. int ega_init(void)
  303. {
  304.     void *ega_ph_addr;
  305.     size_t sz;
  306.  
  307.  
  308.     ega_ph_addr=(void *)sysinfo_value("fb.address.physical");
  309.     scr_width=sysinfo_value("fb.width");
  310.     scr_height=sysinfo_value("fb.height");
  311.     iospace_enable(task_get_id(),(void *)EGA_IO_ADDRESS,2);
  312.  
  313.     sz = scr_width*scr_height*2;
  314.     scr_addr = as_get_mappable_page(sz);
  315.  
  316.     map_physmem(ega_ph_addr, scr_addr, ALIGN_UP(sz,PAGE_SIZE)>>PAGE_WIDTH,
  317.             AS_AREA_READ | AS_AREA_WRITE);
  318.  
  319.     async_set_client_connection(ega_client_connection);
  320.  
  321.     return 0;
  322. }
  323.  
  324.  
  325. /**
  326.  * @}
  327.  */
  328.