| 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 | #include <stdlib.h>
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| 38 | #include <unistd.h>
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| 39 | #include <align.h>
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| 40 | #include <async.h>
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| 41 | #include <ipc/ipc.h>
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| 42 | #include <errno.h>
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| 43 | #include <stdio.h>
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| 44 | #include <ddi.h>
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| 45 | #include <sysinfo.h>
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| 46 | #include <as.h>
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| 47 | #include <ipc/fb.h>
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| 48 | #include <ipc/ipc.h>
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| 49 | #include <ipc/ns.h>
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| 50 | #include <ipc/services.h>
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| 51 | #include <libarch/ddi.h>
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| 52 |
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| 53 | #include "ega.h"
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| 54 | #include "../console/screenbuffer.h"
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| 55 | #include "main.h"
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| 56 |
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| 57 | #define MAX_SAVED_SCREENS 256
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| 58 | typedef struct saved_screen {
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| 59 | short *data;
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| 60 | } saved_screen;
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| 61 |
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| 62 | saved_screen saved_screens[MAX_SAVED_SCREENS];
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| 63 |
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| 64 | #define EGA_IO_ADDRESS 0x3d4
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| 65 | #define EGA_IO_SIZE 2
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| 66 |
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| 67 | int ega_normal_color=0x0f;
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| 68 | int ega_inverted_color=0xf0;
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| 69 |
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| 70 | #define NORMAL_COLOR ega_normal_color
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| 71 | #define INVERTED_COLOR ega_inverted_color
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| 72 |
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| 73 | #define EGA_STYLE(fg,bg) ((fg) > (bg) ? NORMAL_COLOR : INVERTED_COLOR)
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| 74 |
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| 75 | /* Allow only 1 connection */
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| 76 | static int client_connected = 0;
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| 77 |
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| 78 | static unsigned int scr_width;
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| 79 | static unsigned int scr_height;
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| 80 | static char *scr_addr;
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| 81 |
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| 82 | static unsigned int style;
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| 83 |
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| 84 | static void clrscr(void)
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| 85 | {
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| 86 | int i;
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| 87 |
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| 88 | for (i = 0; i < scr_width * scr_height; i++) {
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| 89 | scr_addr[i * 2] = ' ';
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| 90 | scr_addr[i * 2 + 1] = style;
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| 91 | }
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| 92 | }
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| 93 |
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| 94 | static void cursor_goto(unsigned int row, unsigned int col)
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| 95 | {
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| 96 | int ega_cursor;
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| 97 |
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| 98 | ega_cursor = col + scr_width * row;
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| 99 |
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| 100 | outb(EGA_IO_ADDRESS, 0xe);
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| 101 | outb(EGA_IO_ADDRESS + 1, (ega_cursor >> 8) & 0xff);
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| 102 | outb(EGA_IO_ADDRESS, 0xf);
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| 103 | outb(EGA_IO_ADDRESS + 1, ega_cursor & 0xff);
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| 104 | }
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| 105 |
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| 106 | static void cursor_disable(void)
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| 107 | {
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| 108 | uint8_t stat;
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| 109 |
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| 110 | outb(EGA_IO_ADDRESS, 0xa);
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| 111 | stat=inb(EGA_IO_ADDRESS + 1);
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| 112 | outb(EGA_IO_ADDRESS, 0xa);
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| 113 | outb(EGA_IO_ADDRESS + 1, stat | (1 << 5));
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| 114 | }
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| 115 |
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| 116 | static void cursor_enable(void)
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| 117 | {
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| 118 | uint8_t stat;
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| 119 |
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| 120 | outb(EGA_IO_ADDRESS, 0xa);
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| 121 | stat=inb(EGA_IO_ADDRESS + 1);
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| 122 | outb(EGA_IO_ADDRESS, 0xa);
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| 123 | outb(EGA_IO_ADDRESS + 1, stat & (~(1 << 5)));
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| 124 | }
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| 125 |
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| 126 | static void scroll(int rows)
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| 127 | {
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| 128 | int i;
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| 129 | if (rows > 0) {
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| 130 | memcpy(scr_addr, ((char *) scr_addr) + rows * scr_width * 2,
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| 131 | scr_width * scr_height * 2 - rows * scr_width * 2);
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| 132 | for (i = 0; i < rows * scr_width; i++)
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| 133 | (((short *) scr_addr) + scr_width * scr_height - rows *
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| 134 | scr_width)[i] = ((style << 8) + ' ');
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| 135 | } else if (rows < 0) {
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| 136 | memcpy(((char *)scr_addr) - rows * scr_width * 2, scr_addr,
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| 137 | scr_width * scr_height * 2 + rows * scr_width * 2);
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| 138 | for (i = 0; i < -rows * scr_width; i++)
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| 139 | ((short *)scr_addr)[i] = ((style << 8 ) + ' ');
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| 140 | }
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| 141 | }
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| 142 |
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| 143 | static void printchar(char c, unsigned int row, unsigned int col)
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| 144 | {
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| 145 | scr_addr[(row * scr_width + col) * 2] = c;
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| 146 | scr_addr[(row * scr_width + col) * 2 + 1] = style;
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| 147 |
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| 148 | cursor_goto(row, col + 1);
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| 149 | }
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| 150 |
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| 151 | static void draw_text_data(keyfield_t *data)
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| 152 | {
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| 153 | int i;
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| 154 |
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| 155 | for (i = 0; i < scr_width * scr_height; i++) {
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| 156 | scr_addr[i * 2] = data[i].character;
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| 157 | scr_addr[i * 2 + 1] = EGA_STYLE(data[i].style.fg_color,
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| 158 | data[i].style.bg_color);
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| 159 | }
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| 160 | }
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| 161 |
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| 162 | static int save_screen(void)
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| 163 | {
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| 164 | int i;
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| 165 |
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| 166 | for (i = 0; (i < MAX_SAVED_SCREENS) && (saved_screens[i].data); i++)
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| 167 | ;
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| 168 | if (i == MAX_SAVED_SCREENS)
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| 169 | return EINVAL;
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| 170 | if (!(saved_screens[i].data = malloc(2 * scr_width * scr_height)))
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| 171 | return ENOMEM;
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| 172 | memcpy(saved_screens[i].data, scr_addr, 2 * scr_width * scr_height);
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| 173 |
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| 174 | return i;
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| 175 | }
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| 176 |
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| 177 | static int print_screen(int i)
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| 178 | {
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| 179 | if (saved_screens[i].data)
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| 180 | memcpy(scr_addr, saved_screens[i].data, 2 * scr_width *
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| 181 | scr_height);
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| 182 | else
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| 183 | return EINVAL;
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| 184 | return i;
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| 185 | }
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| 186 |
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| 187 |
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| 188 | static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
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| 189 | {
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| 190 | int retval;
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| 191 | ipc_callid_t callid;
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| 192 | ipc_call_t call;
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| 193 | char c;
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| 194 | unsigned int row, col;
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| 195 | int bgcolor,fgcolor;
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| 196 | keyfield_t *interbuf = NULL;
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| 197 | size_t intersize = 0;
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| 198 | int i;
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| 199 |
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| 200 | if (client_connected) {
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| 201 | ipc_answer_0(iid, ELIMIT);
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| 202 | return;
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| 203 | }
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| 204 | client_connected = 1;
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| 205 | ipc_answer_0(iid, EOK); /* Accept connection */
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| 206 |
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| 207 | while (1) {
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| 208 | callid = async_get_call(&call);
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| 209 | switch (IPC_GET_METHOD(call)) {
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| 210 | case IPC_M_PHONE_HUNGUP:
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| 211 | client_connected = 0;
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| 212 | ipc_answer_0(callid, EOK);
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| 213 | return; /* Exit thread */
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| 214 | case IPC_M_SHARE_OUT:
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| 215 | /* We accept one area for data interchange */
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| 216 | intersize = IPC_GET_ARG2(call);
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| 217 | if (intersize >= scr_width * scr_height *
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| 218 | sizeof(*interbuf)) {
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| 219 | receive_comm_area(callid, &call,
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| 220 | (void *) &interbuf);
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| 221 | continue;
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| 222 | }
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| 223 | retval = EINVAL;
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| 224 | break;
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| 225 | case FB_DRAW_TEXT_DATA:
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| 226 | if (!interbuf) {
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| 227 | retval = EINVAL;
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| 228 | break;
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| 229 | }
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| 230 | draw_text_data(interbuf);
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| 231 | retval = 0;
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| 232 | break;
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| 233 | case FB_GET_CSIZE:
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| 234 | ipc_answer_2(callid, EOK, scr_height, scr_width);
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| 235 | continue;
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| 236 | case FB_CLEAR:
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| 237 | clrscr();
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| 238 | retval = 0;
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| 239 | break;
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| 240 | case FB_PUTCHAR:
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| 241 | c = IPC_GET_ARG1(call);
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| 242 | row = IPC_GET_ARG2(call);
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| 243 | col = IPC_GET_ARG3(call);
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| 244 | if (col >= scr_width || row >= scr_height) {
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| 245 | retval = EINVAL;
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| 246 | break;
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| 247 | }
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| 248 | printchar(c, row, col);
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| 249 | retval = 0;
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| 250 | break;
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| 251 | case FB_CURSOR_GOTO:
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| 252 | row = IPC_GET_ARG1(call);
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| 253 | col = IPC_GET_ARG2(call);
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| 254 | if (row >= scr_height || col >= scr_width) {
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| 255 | retval = EINVAL;
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| 256 | break;
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| 257 | }
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| 258 | cursor_goto(row, col);
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| 259 | retval = 0;
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| 260 | break;
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| 261 | case FB_SCROLL:
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| 262 | i = IPC_GET_ARG1(call);
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| 263 | if (i > scr_height || i < -((int) scr_height)) {
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| 264 | retval = EINVAL;
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| 265 | break;
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| 266 | }
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| 267 | scroll(i);
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| 268 | retval = 0;
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| 269 | break;
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| 270 | case FB_CURSOR_VISIBILITY:
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| 271 | if(IPC_GET_ARG1(call))
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| 272 | cursor_enable();
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| 273 | else
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| 274 | cursor_disable();
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| 275 | retval = 0;
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| 276 | break;
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| 277 | case FB_SET_STYLE:
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| 278 | fgcolor = IPC_GET_ARG1(call);
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| 279 | bgcolor = IPC_GET_ARG2(call);
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| 280 | style = EGA_STYLE(fgcolor, bgcolor);
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| 281 | retval = 0;
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| 282 | break;
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| 283 | case FB_VP_DRAW_PIXMAP:
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| 284 | i = IPC_GET_ARG2(call);
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| 285 | retval = print_screen(i);
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| 286 | break;
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| 287 | case FB_VP2PIXMAP:
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| 288 | retval = save_screen();
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| 289 | break;
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| 290 | case FB_DROP_PIXMAP:
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| 291 | i = IPC_GET_ARG1(call);
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| 292 | if (i >= MAX_SAVED_SCREENS) {
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| 293 | retval = EINVAL;
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| 294 | break;
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| 295 | }
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| 296 | if (saved_screens[i].data) {
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| 297 | free(saved_screens[i].data);
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| 298 | saved_screens[i].data = NULL;
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| 299 | }
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| 300 | retval = 0;
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| 301 | break;
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| 302 |
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| 303 | default:
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| 304 | retval = ENOENT;
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| 305 | }
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| 306 | ipc_answer_0(callid, retval);
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| 307 | }
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| 308 | }
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| 309 |
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| 310 | int ega_init(void)
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| 311 | {
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| 312 | void *ega_ph_addr;
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| 313 | size_t sz;
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| 314 |
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| 315 | ega_ph_addr = (void *) sysinfo_value("fb.address.physical");
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| 316 | scr_width = sysinfo_value("fb.width");
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| 317 | scr_height = sysinfo_value("fb.height");
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| 318 | if(sysinfo_value("fb.blinking"))
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| 319 | {
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| 320 | ega_normal_color&=0x77;
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| 321 | ega_inverted_color&=0x77;
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| 322 | }
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| 323 | style = NORMAL_COLOR;
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| 324 |
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| 325 | iospace_enable(task_get_id(), (void *) EGA_IO_ADDRESS, 2);
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| 326 |
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| 327 | sz = scr_width * scr_height * 2;
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| 328 | scr_addr = as_get_mappable_page(sz);
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| 329 |
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| 330 | physmem_map(ega_ph_addr, scr_addr, ALIGN_UP(sz, PAGE_SIZE) >>
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| 331 | PAGE_WIDTH, AS_AREA_READ | AS_AREA_WRITE);
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| 332 |
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| 333 | async_set_client_connection(ega_client_connection);
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| 334 |
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| 335 | return 0;
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| 336 | }
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| 337 |
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| 338 |
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| 339 | /**
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| 340 | * @}
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| 341 | */
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