/*
* Copyright (c) 2001-2004 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup genarch_drivers
* @{
*/
/**
* @file
* @brief EGA driver.
*/
#include <genarch/drivers/ega/ega.h>
#include <putchar.h>
#include <mm/page.h>
#include <mm/as.h>
#include <mm/slab.h>
#include <arch/mm/page.h>
#include <synch/spinlock.h>
#include <arch/types.h>
#include <arch/asm.h>
#include <memstr.h>
#include <console/chardev.h>
#include <console/console.h>
#include <sysinfo/sysinfo.h>
#include <ddi/ddi.h>
/*
* The EGA driver.
* Simple and short. Function for displaying characters and "scrolling".
*/
SPINLOCK_INITIALIZE(egalock);
static uint32_t ega_cursor;
static uint8_t *videoram;
static uint8_t *backbuf;
static ioport8_t *ega_base;
#define SPACE 0x20
#define STYLE 0x1e
#define INVAL 0x17
#define EMPTY_CHAR ((STYLE << 8) | SPACE)
static uint16_t ega_oem_glyph(const wchar_t ch)
{
if ((ch >= 0x0000) && (ch <= 0x007f))
return ch;
if (ch == 0x00a0)
return 255;
if (ch == 0x00a1)
return 173;
if ((ch >= 0x00a2) && (ch <= 0x00a3))
return (ch - 7);
if (ch == 0x00a5)
return 157;
if (ch == 0x00aa)
return 166;
if (ch == 0x00ab)
return 174;
if (ch == 0x00ac)
return 170;
if (ch == 0x00b0)
return 248;
if (ch == 0x00b1)
return 241;
if (ch == 0x00b2)
return 253;
if (ch == 0x00b5)
return 230;
if (ch == 0x00b7)
return 250;
if (ch == 0x00ba)
return 167;
if (ch == 0x00bb)
return 175;
if (ch == 0x00bc)
return 172;
if (ch == 0x00bd)
return 171;
if (ch == 0x00bf)
return 168;
if ((ch >= 0x00c4) && (ch <= 0x00c5))
return (ch - 54);
if (ch == 0x00c6)
return 146;
if (ch == 0x00c7)
return 128;
if (ch == 0x00c9)
return 144;
if (ch == 0x00d1)
return 165;
if (ch == 0x00d6)
return 153;
if (ch == 0x00dc)
return 154;
if (ch == 0x00df)
return 225;
if (ch == 0x00e0)
return 133;
if (ch == 0x00e1)
return 160;
if (ch == 0x00e2)
return 131;
if (ch == 0x00e4)
return 132;
if (ch == 0x00e5)
return 134;
if (ch == 0x00e6)
return 145;
if (ch == 0x00e7)
return 135;
if (ch == 0x00e8)
return 138;
if (ch == 0x00e9)
return 130;
if ((ch >= 0x00ea) && (ch <= 0x00eb))
return (ch - 98);
if (ch == 0x00ec)
return 141;
if (ch == 0x00ed)
return 161;
if (ch == 0x00ee)
return 140;
if (ch == 0x00ef)
return 139;
if (ch == 0x00f1)
return 164;
if (ch == 0x00f2)
return 149;
if (ch == 0x00f3)
return 162;
if (ch == 0x00f4)
return 147;
if (ch == 0x00f6)
return 148;
if (ch == 0x00f7)
return 246;
if (ch == 0x00f9)
return 151;
if (ch == 0x00fa)
return 163;
if (ch == 0x00fb)
return 150;
if (ch == 0x00fc)
return 129;
if (ch == 0x00ff)
return 152;
if (ch == 0x0192)
return 159;
if (ch == 0x0393)
return 226;
if (ch == 0x0398)
return 233;
if (ch == 0x03a3)
return 228;
if (ch == 0x03a6)
return 232;
if (ch == 0x03a9)
return 234;
if (ch == 0x03b1)
return 224;
if (ch == 0x03b4)
return 235;
if (ch == 0x03b5)
return 238;
if (ch == 0x03c0)
return 227;
if (ch == 0x03c3)
return 229;
if (ch == 0x03c4)
return 231;
if (ch == 0x03c6)
return 237;
if (ch == 0x207f)
return 252;
if (ch == 0x20a7)
return 158;
if (ch == 0x2219)
return 249;
if (ch == 0x221a)
return 251;
if (ch == 0x221e)
return 236;
if (ch == 0x2229)
return 239;
if (ch == 0x2248)
return 247;
if (ch == 0x2261)
return 240;
if (ch == 0x2264)
return 243;
if (ch == 0x2265)
return 242;
if (ch == 0x2310)
return 169;
if ((ch >= 0x2320) && (ch <= 0x2321))
return (ch - 8748);
if (ch == 0x2500)
return 196;
if (ch == 0x2502)
return 179;
if (ch == 0x250c)
return 218;
if (ch == 0x2510)
return 191;
if (ch == 0x2514)
return 192;
if (ch == 0x2518)
return 217;
if (ch == 0x251c)
return 195;
if (ch == 0x2524)
return 180;
if (ch == 0x252c)
return 194;
if (ch == 0x2534)
return 193;
if (ch == 0x253c)
return 197;
if (ch == 0x2550)
return 205;
if (ch == 0x2551)
return 186;
if ((ch >= 0x2552) && (ch <= 0x2553))
return (ch - 9341);
if (ch == 0x2554)
return 201;
if (ch == 0x2555)
return 184;
if (ch == 0x2556)
return 183;
if (ch == 0x2557)
return 187;
if (ch == 0x2558)
return 212;
if (ch == 0x2559)
return 211;
if (ch == 0x255a)
return 200;
if (ch == 0x255b)
return 190;
if (ch == 0x255c)
return 189;
if (ch == 0x255d)
return 188;
if ((ch >= 0x255e) && (ch <= 0x255f))
return (ch - 9368);
if (ch == 0x2560)
return 204;
if ((ch >= 0x2561) && (ch <= 0x2562))
return (ch - 9388);
if (ch == 0x2563)
return 185;
if ((ch >= 0x2564) && (ch <= 0x2565))
return (ch - 9363);
if (ch == 0x2566)
return 203;
if ((ch >= 0x2567) && (ch <= 0x2568))
return (ch - 9368);
if (ch == 0x2569)
return 202;
if (ch == 0x256a)
return 216;
if (ch == 0x256b)
return 215;
if (ch == 0x256c)
return 206;
if (ch == 0x2580)
return 223;
if (ch == 0x2584)
return 220;
if (ch == 0x2588)
return 219;
if (ch == 0x258c)
return 221;
if (ch == 0x2590)
return 222;
if ((ch >= 0x2591) && (ch <= 0x2593))
return (ch - 9441);
return 256;
}
/*
* This function takes care of scrolling.
*/
static void ega_check_cursor(void)
{
if (ega_cursor < EGA_SCREEN)
return;
memmove((void *) videoram
, (void *) (videoram
+ EGA_COLS
* 2),
(EGA_SCREEN - EGA_COLS) * 2);
memmove((void *) backbuf
, (void *) (backbuf
+ EGA_COLS
* 2),
(EGA_SCREEN - EGA_COLS) * 2);
memsetw(videoram + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
memsetw(backbuf + (EGA_SCREEN - EGA_COLS) * 2, EGA_COLS, EMPTY_CHAR);
ega_cursor = ega_cursor - EGA_COLS;
}
static void ega_show_cursor(void)
{
pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);
uint8_t stat = pio_read_8(ega_base + EGA_DATA_REG);
pio_write_8(ega_base + EGA_INDEX_REG, 0x0a);
pio_write_8(ega_base + EGA_DATA_REG, stat & (~(1 << 5)));
}
static void ega_move_cursor(void)
{
pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);
pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff));
pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
pio_write_8(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff));
}
static void ega_sync_cursor(void)
{
pio_write_8(ega_base + EGA_INDEX_REG, 0x0e);
uint8_t hi = pio_read_8(ega_base + EGA_DATA_REG);
pio_write_8(ega_base + EGA_INDEX_REG, 0x0f);
uint8_t lo = pio_read_8(ega_base + EGA_DATA_REG);
ega_cursor = (hi << 8) | lo;
if (ega_cursor >= EGA_SCREEN)
ega_cursor = 0;
if ((ega_cursor % EGA_COLS) != 0)
ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
memsetw(videoram + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
memsetw(backbuf + ega_cursor * 2, EGA_SCREEN - ega_cursor, EMPTY_CHAR);
ega_check_cursor();
ega_move_cursor();
ega_show_cursor();
}
static void ega_display_char(wchar_t ch, bool silent)
{
uint16_t index = ega_oem_glyph(ch);
uint8_t glyph;
uint8_t style;
if ((index >> 8)) {
glyph = '?';
style = INVAL;
} else {
glyph = index & 0xff;
style = STYLE;
}
backbuf[ega_cursor * 2] = glyph;
backbuf[ega_cursor * 2 + 1] = style;
if (!silent) {
videoram[ega_cursor * 2] = glyph;
videoram[ega_cursor * 2 + 1] = style;
}
}
static void ega_putchar(outdev_t *dev __attribute__((unused)), wchar_t ch, bool silent)
{
ipl_t ipl;
ipl = interrupts_disable();
spinlock_lock(&egalock);
switch (ch) {
case '\n':
ega_cursor = (ega_cursor + EGA_COLS) - ega_cursor % EGA_COLS;
break;
case '\t':
ega_cursor = (ega_cursor + 8) - ega_cursor % 8;
break;
case '\b':
if (ega_cursor % EGA_COLS)
ega_cursor--;
break;
default:
ega_display_char(ch, silent);
ega_cursor++;
break;
}
ega_check_cursor();
if (!silent)
ega_move_cursor();
spinlock_unlock(&egalock);
interrupts_restore(ipl);
}
static outdev_t ega_console;
static outdev_operations_t ega_ops = {
.write = ega_putchar
};
void ega_init(ioport8_t *base, uintptr_t videoram_phys)
{
/* Initialize the software structure. */
ega_base = base;
backbuf
= (uint8_t *) malloc(EGA_VRAM_SIZE
, 0);
if (!backbuf)
panic("Unable to allocate backbuffer.");
videoram = (uint8_t *) hw_map(videoram_phys, EGA_VRAM_SIZE);
/* Synchronize the back buffer and cursor position. */
memcpy(backbuf
, videoram
, EGA_VRAM_SIZE
);
ega_sync_cursor();
outdev_initialize("ega", &ega_console, &ega_ops);
stdout = &ega_console;
sysinfo_set_item_val("fb", NULL, true);
sysinfo_set_item_val("fb.kind", NULL, 2);
sysinfo_set_item_val("fb.width", NULL, EGA_COLS);
sysinfo_set_item_val("fb.height", NULL, EGA_ROWS);
sysinfo_set_item_val("fb.blinking", NULL, true);
sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys);
}
void ega_redraw(void)
{
memcpy(videoram
, backbuf
, EGA_VRAM_SIZE
);
ega_move_cursor();
ega_show_cursor();
}
/** @}
*/