| 1 | /*
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| 2 | * Copyright (C) 2006 Ondrej Palkovsky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @defgroup egafb EGA framebuffer
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| 30 | * @brief HelenOS EGA framebuffer.
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| 31 | * @ingroup fbs
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| 32 | * @{
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| 33 | */
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| 34 | /** @file
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| 35 | */
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| 36 |
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| 37 |
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| 38 | #include <stdlib.h>
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| 39 | #include <unistd.h>
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| 40 | #include <align.h>
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| 41 | #include <async.h>
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| 42 | #include <ipc/ipc.h>
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| 43 | #include <errno.h>
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| 44 | #include <stdio.h>
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| 45 | #include <ddi.h>
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| 46 | #include <sysinfo.h>
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| 47 | #include <as.h>
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| 48 | #include <ipc/fb.h>
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| 49 | #include <ipc/ipc.h>
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| 50 | #include <ipc/ns.h>
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| 51 | #include <ipc/services.h>
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| 52 | #include <libarch/ddi.h>
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| 53 |
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| 54 | #include "ega.h"
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| 55 | #include "../console/screenbuffer.h"
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| 56 | #include "main.h"
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| 57 |
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| 58 | #define MAX_SAVED_SCREENS 256
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| 59 | typedef struct saved_screen {
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| 60 | short *data;
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| 61 | } saved_screen;
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| 62 |
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| 63 | saved_screen saved_screens[MAX_SAVED_SCREENS];
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| 64 |
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| 65 |
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| 66 | #define EGA_IO_ADDRESS 0x3d4
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| 67 | #define EGA_IO_SIZE 2
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| 68 |
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| 69 | #define NORMAL_COLOR 0x0f
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| 70 | #define INVERTED_COLOR 0xf0
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| 71 |
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| 72 | #define EGA_STYLE(fg,bg) ((fg) > (bg) ? NORMAL_COLOR : INVERTED_COLOR)
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| 73 |
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| 74 | /* Allow only 1 connection */
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| 75 | static int client_connected = 0;
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| 76 |
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| 77 | static unsigned int scr_width;
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| 78 | static unsigned int scr_height;
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| 79 | static char *scr_addr;
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| 80 |
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| 81 | static unsigned int style = NORMAL_COLOR;
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| 82 |
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| 83 | static void clrscr(void)
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| 84 | {
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| 85 | int i;
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| 86 |
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| 87 | for (i=0; i < scr_width*scr_height; i++) {
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| 88 | scr_addr[i*2] = ' ';
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| 89 | scr_addr[i*2+1] = style;
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| 90 | }
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| 91 | }
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| 92 |
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| 93 | static void cursor_goto(unsigned int row, unsigned int col)
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| 94 | {
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| 95 | int ega_cursor;
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| 96 |
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| 97 | ega_cursor=col+scr_width*row;
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| 98 |
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| 99 | outb(EGA_IO_ADDRESS , 0xe);
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| 100 | outb(EGA_IO_ADDRESS + 1, (ega_cursor >>8) & 0xff);
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| 101 | outb(EGA_IO_ADDRESS , 0xf);
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| 102 | outb(EGA_IO_ADDRESS + 1, ega_cursor & 0xff);
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| 103 | }
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| 104 |
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| 105 | static void cursor_disable(void)
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| 106 | {
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| 107 | uint8_t stat;
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| 108 |
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| 109 | outb(EGA_IO_ADDRESS , 0xa);
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| 110 | stat=inb(EGA_IO_ADDRESS + 1);
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| 111 | outb(EGA_IO_ADDRESS , 0xa);
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| 112 | outb(EGA_IO_ADDRESS +1 ,stat | (1<<5) );
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| 113 | }
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| 114 |
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| 115 | static void cursor_enable(void)
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| 116 | {
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| 117 | uint8_t stat;
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| 118 |
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| 119 | outb(EGA_IO_ADDRESS , 0xa);
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| 120 | stat=inb(EGA_IO_ADDRESS + 1);
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| 121 | outb(EGA_IO_ADDRESS , 0xa);
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| 122 | outb(EGA_IO_ADDRESS +1 ,stat & (~(1<<5)) );
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| 123 | }
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| 124 |
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| 125 | static void scroll(int rows)
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| 126 | {
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| 127 | int i;
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| 128 | if (rows > 0) {
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| 129 | memcpy (scr_addr,((char *)scr_addr) + rows * scr_width * 2, scr_width * scr_height * 2 - rows * scr_width * 2);
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| 130 | for (i = 0; i < rows * scr_width ; i ++)
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| 131 | (((short *)scr_addr) + scr_width * scr_height - rows * scr_width) [i] = ((style << 8) + ' ');
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| 132 | } else if (rows < 0) {
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| 133 |
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| 134 | memcpy (((char *)scr_addr) - rows * scr_width * 2 ,scr_addr ,scr_width * scr_height * 2 + rows * scr_width * 2);
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| 135 | for (i = 0; i < - rows * scr_width ; i++)
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| 136 | ((short *)scr_addr) [i] = ((style << 8 ) + ' ');
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| 137 | }
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| 138 | }
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| 139 |
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| 140 | static void printchar(char c, unsigned int row, unsigned int col)
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| 141 | {
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| 142 | scr_addr[(row*scr_width + col)*2] = c;
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| 143 | scr_addr[(row*scr_width + col)*2+1] = style;
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| 144 |
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| 145 | cursor_goto(row,col+1);
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| 146 | }
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| 147 |
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| 148 | static void draw_text_data(keyfield_t *data)
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| 149 | {
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| 150 | int i;
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| 151 |
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| 152 | for (i=0; i < scr_width*scr_height; i++) {
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| 153 | scr_addr[i*2] = data[i].character;
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| 154 | scr_addr[i*2+1] = EGA_STYLE(data[i].style.fg_color, data[i].style.bg_color);
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| 155 | }
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| 156 | }
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| 157 |
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| 158 | static int save_screen(void)
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| 159 | {
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| 160 | int i;
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| 161 |
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| 162 | for (i=0; ( i < MAX_SAVED_SCREENS ) && (saved_screens[i].data); i++)
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| 163 | ;
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| 164 | if (i == MAX_SAVED_SCREENS)
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| 165 | return EINVAL;
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| 166 | if (!(saved_screens[i].data=malloc( 2 * scr_width*scr_height )))
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| 167 | return ENOMEM;
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| 168 | memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
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| 169 |
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| 170 | return i;
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| 171 | }
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| 172 |
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| 173 | static int print_screen(int i)
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| 174 | {
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| 175 | if (saved_screens[i].data)
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| 176 | memcpy(scr_addr, saved_screens[i].data, 2 * scr_width * scr_height);
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| 177 | else return EINVAL;
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| 178 | return i;
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| 179 | }
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| 180 |
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| 181 |
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| 182 | static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
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| 183 | {
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| 184 | int retval;
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| 185 | ipc_callid_t callid;
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| 186 | ipc_call_t call;
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| 187 | char c;
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| 188 | unsigned int row, col;
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| 189 | int bgcolor,fgcolor;
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| 190 | keyfield_t *interbuf = NULL;
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| 191 | size_t intersize = 0;
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| 192 | int i;
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| 193 |
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| 194 | if (client_connected) {
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| 195 | ipc_answer_fast(iid, ELIMIT, 0,0);
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| 196 | return;
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| 197 | }
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| 198 | client_connected = 1;
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| 199 | ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
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| 200 |
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| 201 | while (1) {
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| 202 | callid = async_get_call(&call);
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| 203 | switch (IPC_GET_METHOD(call)) {
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| 204 | case IPC_M_PHONE_HUNGUP:
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| 205 | client_connected = 0;
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| 206 | ipc_answer_fast(callid,0,0,0);
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| 207 | return; /* Exit thread */
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| 208 | case IPC_M_AS_AREA_SEND:
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| 209 | /* We accept one area for data interchange */
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| 210 | intersize = IPC_GET_ARG2(call);
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| 211 | if (intersize >= scr_width*scr_height*sizeof(*interbuf)) {
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| 212 | receive_comm_area(callid,&call,(void *)&interbuf);
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| 213 | continue;
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| 214 | }
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| 215 | retval = EINVAL;
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| 216 | break;
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| 217 | case FB_DRAW_TEXT_DATA:
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| 218 | if (!interbuf) {
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| 219 | retval = EINVAL;
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| 220 | break;
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| 221 | }
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| 222 | draw_text_data(interbuf);
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| 223 | retval = 0;
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| 224 | break;
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| 225 | case FB_GET_CSIZE:
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| 226 | ipc_answer_fast(callid, 0, scr_height, scr_width);
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| 227 | continue;
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| 228 | case FB_CLEAR:
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| 229 | clrscr();
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| 230 | retval = 0;
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| 231 | break;
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| 232 | case FB_PUTCHAR:
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| 233 | c = IPC_GET_ARG1(call);
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| 234 | row = IPC_GET_ARG2(call);
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| 235 | col = IPC_GET_ARG3(call);
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| 236 | if (col >= scr_width || row >= scr_height) {
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| 237 | retval = EINVAL;
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| 238 | break;
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| 239 | }
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| 240 | printchar(c,row,col);
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| 241 | retval = 0;
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| 242 | break;
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| 243 | case FB_CURSOR_GOTO:
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| 244 | row = IPC_GET_ARG1(call);
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| 245 | col = IPC_GET_ARG2(call);
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| 246 | if (row >= scr_height || col >= scr_width) {
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| 247 | retval = EINVAL;
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| 248 | break;
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| 249 | }
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| 250 | cursor_goto(row,col);
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| 251 | retval = 0;
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| 252 | break;
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| 253 | case FB_SCROLL:
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| 254 | i = IPC_GET_ARG1(call);
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| 255 | if (i > scr_height || i < (- (int)scr_height)) {
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| 256 | retval = EINVAL;
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| 257 | break;
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| 258 | }
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| 259 | scroll(i);
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| 260 | retval = 0;
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| 261 | break;
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| 262 | case FB_CURSOR_VISIBILITY:
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| 263 | if(IPC_GET_ARG1(call))
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| 264 | cursor_enable();
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| 265 | else
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| 266 | cursor_disable();
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| 267 | retval = 0;
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| 268 | break;
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| 269 | case FB_SET_STYLE:
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| 270 | fgcolor = IPC_GET_ARG1(call);
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| 271 | bgcolor = IPC_GET_ARG2(call);
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| 272 | style = EGA_STYLE(fgcolor, bgcolor);
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| 273 | retval = 0;
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| 274 | break;
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| 275 | case FB_VP_DRAW_PIXMAP:
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| 276 | i = IPC_GET_ARG2(call);
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| 277 | retval = print_screen(i);
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| 278 | break;
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| 279 | case FB_VP2PIXMAP:
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| 280 | retval = save_screen();
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| 281 | break;
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| 282 | case FB_DROP_PIXMAP:
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| 283 | i = IPC_GET_ARG1(call);
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| 284 | if (i >= MAX_SAVED_SCREENS) {
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| 285 | retval = EINVAL;
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| 286 | break;
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| 287 | }
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| 288 | if (saved_screens[i].data) {
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| 289 | free(saved_screens[i].data);
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| 290 | saved_screens[i].data = NULL;
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| 291 | }
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| 292 | retval = 0;
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| 293 | break;
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| 294 |
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| 295 | default:
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| 296 | retval = ENOENT;
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| 297 | }
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| 298 | ipc_answer_fast(callid,retval,0,0);
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| 299 | }
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| 300 | }
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| 301 |
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| 302 | int ega_init(void)
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| 303 | {
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| 304 | void *ega_ph_addr;
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| 305 | size_t sz;
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| 306 |
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| 307 |
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| 308 | ega_ph_addr=(void *)sysinfo_value("fb.address.physical");
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| 309 | scr_width=sysinfo_value("fb.width");
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| 310 | scr_height=sysinfo_value("fb.height");
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| 311 | iospace_enable(task_get_id(),(void *)EGA_IO_ADDRESS,2);
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| 312 |
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| 313 | sz = scr_width*scr_height*2;
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| 314 | scr_addr = as_get_mappable_page(sz);
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| 315 |
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| 316 | map_physmem(ega_ph_addr, scr_addr, ALIGN_UP(sz,PAGE_SIZE)>>PAGE_WIDTH,
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| 317 | AS_AREA_READ | AS_AREA_WRITE);
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| 318 |
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| 319 | async_set_client_connection(ega_client_connection);
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| 320 |
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| 321 | return 0;
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| 322 | }
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| 323 |
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| 324 |
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| 325 | /**
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| 326 | * @}
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| 327 | */
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