* Copyright (c) 1999-2001

/* $NetBSD: bicons.c,v 1.14 2011/07/17 20:54:51 joerg Exp $ */

/*-
* Copyright (c) 1999-2001
* Shin Takemura and PocketBSD Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the PocketBSD project
* and its contributors.
* 4. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bicons.c,v 1.14 2011/07/17 20:54:51 joerg Exp $");

#define HALF_FONT

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <dev/cons.h>

#include <machine/bootinfo.h>
#include <sys/bus.h>
#include <machine/platid.h>

#include <dev/hpc/biconsvar.h>
#include <dev/hpc/bicons.h>
extern u_int8_t font_clR8x8_data[];
#define FONT_HEIGHT 8
#define FONT_WIDTH 1

static void put_oxel_D2_M2L_3(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D2_M2L_3x2(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D2_M2L_0(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D2_M2L_0x2(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D4_M2L_F(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D4_M2L_Fx2(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D4_M2L_0(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D4_M2L_0x2(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D8_00(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D8_FF(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D16_0000(u_int8_t *, u_int8_t, u_int8_t);
static void put_oxel_D16_FFFF(u_int8_t *, u_int8_t, u_int8_t);

static const struct {
int type;
const char *name;
void (*func)(u_int8_t *, u_int8_t, u_int8_t);
u_int8_t clear_byte;
int16_t oxel_bytes;
} fb_table[] = {
{ BIFB_D2_M2L_3, BIFBN_D2_M2L_3,
put_oxel_D2_M2L_3, 0, 2 },
{ BIFB_D2_M2L_3x2, BIFBN_D2_M2L_3x2,
put_oxel_D2_M2L_3x2, 0, 1 },
{ BIFB_D2_M2L_0, BIFBN_D2_M2L_0,
put_oxel_D2_M2L_0, 0xff, 2 },
{ BIFB_D2_M2L_0x2, BIFBN_D2_M2L_0x2,
put_oxel_D2_M2L_0x2, 0xff, 1 },
{ BIFB_D4_M2L_F, BIFBN_D4_M2L_F,
put_oxel_D4_M2L_F, 0x00, 4 },
{ BIFB_D4_M2L_Fx2, BIFBN_D4_M2L_Fx2,
put_oxel_D4_M2L_Fx2, 0x00, 2 },
{ BIFB_D4_M2L_0, BIFBN_D4_M2L_0,
put_oxel_D4_M2L_0, 0xff, 4 },
{ BIFB_D4_M2L_0x2, BIFBN_D4_M2L_0x2,
put_oxel_D4_M2L_0x2, 0xff, 2 },
{ BIFB_D8_00, BIFBN_D8_00,
put_oxel_D8_00, 0xff, 8 },
{ BIFB_D8_FF, BIFBN_D8_FF,
put_oxel_D8_FF, 0x00, 8 },
{ BIFB_D16_0000, BIFBN_D16_0000,
put_oxel_D16_0000, 0xff, 16 },
{ BIFB_D16_FFFF, BIFBN_D16_FFFF,
put_oxel_D16_FFFF, 0x00, 16 },
};
#define FB_TABLE_SIZE (sizeof(fb_table) / sizeof(*fb_table))

static u_int8_t *fb_vram;
static int16_t fb_line_bytes;
static u_int8_t fb_clear_byte;
int16_t bicons_ypixel;
int16_t bicons_xpixel;
#ifdef HALF_FONT
static int16_t fb_oxel_bytes = 1;
int16_t bicons_width = 80;
void (*fb_put_oxel)(u_int8_t *, u_int8_t, u_int8_t) = put_oxel_D2_M2L_3x2;
#else /* HALF_FONT */
static int16_t fb_oxel_bytes = 2;
int16_t bicons_width = 40;
void (*fb_put_oxel)(u_int8_t *, u_int8_t, u_int8_t) = put_oxel_D2_M2L_3;
#endif /* HALF_FONT */
int16_t bicons_height;
static int16_t curs_x;
static int16_t curs_y;

static int bicons_priority;
int biconscninit(struct consdev *);
void biconscnprobe(struct consdev *);
void biconscnputc(dev_t, int);
int biconscngetc(dev_t); /* harmless place holder */

static void draw_char(int, int, int);
static void clear(int, int);
static void scroll(int, int, int);
static void bicons_puts(const char *);
static void bicons_printf(const char *, ...) __unused;

int
bicons_init(struct consdev *cndev)
{

if (biconscninit(cndev) != 0)
return (1);

biconscnprobe(cndev);

return (0); /* success */
}

int
biconscninit(struct consdev *cndev)
{
int fb_index = -1;

if (bootinfo->fb_addr == 0) {
/* Bootinfo don't have frame buffer address */
return (1);
}

for (fb_index = 0; fb_index < FB_TABLE_SIZE; fb_index++)
if (fb_table[fb_index].type == bootinfo->fb_type)
break;

if (FB_TABLE_SIZE <= fb_index || fb_index == -1) {
/* Unknown frame buffer type, don't enable bicons. */
return (1);
}

fb_vram = (u_int8_t *)bootinfo->fb_addr;
fb_line_bytes = bootinfo->fb_line_bytes;
bicons_xpixel = bootinfo->fb_width;
bicons_ypixel = bootinfo->fb_height;

fb_put_oxel = fb_table[fb_index].func;
fb_clear_byte = fb_table[fb_index].clear_byte;
fb_oxel_bytes = fb_table[fb_index].oxel_bytes;

bicons_width = bicons_xpixel / (8 * FONT_WIDTH);
bicons_height = bicons_ypixel / FONT_HEIGHT;
clear(0, bicons_ypixel);

curs_x = 0;
curs_y = 0;

bicons_puts("builtin console type = ");
bicons_puts(fb_table[fb_index].name);
bicons_puts("\n");

return (0);
}

void
biconscnprobe(struct consdev *cndev)
{
extern const struct cdevsw biconsdev_cdevsw;
int maj;

/* locate the major number */
maj = cdevsw_lookup_major(&biconsdev_cdevsw);

cndev->cn_dev = makedev(maj, 0);
cndev->cn_pri = bicons_priority;
}

void
bicons_set_priority(int priority)
{
bicons_priority = priority;
}

int
biconscngetc(dev_t dev)
{
printf("no input method. reboot me.\n");
while (1)
;
/* NOTREACHED */
return 0;
}

void
biconscnputc(dev_t dev, int c)
{
int line_feed = 0;

switch (c) {
case 0x08: /* back space */
if (--curs_x < 0) {
curs_x = 0;
}
/* erase character ar cursor position */
draw_char(curs_x, curs_y, ' ');
break;
case '\r':
curs_x = 0;
break;
case '\n':
curs_x = 0;
line_feed = 1;
break;
default:
draw_char(curs_x, curs_y, c);
if (bicons_width <= ++curs_x) {
curs_x = 0;
line_feed = 1;
}
}

if (line_feed) {
if (bicons_height <= ++curs_y) {
/* scroll up */
scroll(FONT_HEIGHT, (bicons_height - 1) * FONT_HEIGHT,
- FONT_HEIGHT);
clear((bicons_height - 1) * FONT_HEIGHT, FONT_HEIGHT);
curs_y--;
}
}
}

void
bicons_puts(const char *s)
{
while (*s)
biconscnputc(0, *s++);
}

void
bicons_putn(const char *s, int n)
{
while (0 < n--)
biconscnputc(0, *s++);
}

void
#ifdef __STDC__
bicons_printf(const char *fmt, ...)
#else
bicons_printf(fmt, va_alist)
char *fmt;
va_dcl
#endif
{
va_list ap;
char buf[0x100];

va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
bicons_puts(buf);
}

static void
draw_char(int x, int y, int c)
{
int i;
u_int8_t *p;

if (!fb_vram)
return;

p = &fb_vram[(y * FONT_HEIGHT * fb_line_bytes) +
x * FONT_WIDTH * fb_oxel_bytes];
for (i = 0; i < FONT_HEIGHT; i++) {
(*fb_put_oxel)(p, font_clR8x8_data
[FONT_WIDTH * (FONT_HEIGHT * c + i)], 0xff);
p += (fb_line_bytes);
}
}

static void
clear(int y, int height)
{
u_int8_t *p;

if (!fb_vram)
return;

p = &fb_vram[y * fb_line_bytes];

while (0 < height--) {
memset(p, fb_clear_byte,
bicons_width * fb_oxel_bytes * FONT_WIDTH);
p += fb_line_bytes;
}
}

static void
scroll(int y, int height, int d)
{
u_int8_t *from, *to;

if (!fb_vram)
return;

if (d < 0) {
from = &fb_vram[y * fb_line_bytes];
to = from + d * fb_line_bytes;
while (0 < height--) {
memcpy(to, from, bicons_width * fb_oxel_bytes);
from += fb_line_bytes;
to += fb_line_bytes;
}
} else {
from = &fb_vram[(y + height - 1) * fb_line_bytes];
to = from + d * fb_line_bytes;
while (0 < height--) {
memcpy(to, from, bicons_xpixel * fb_oxel_bytes / 8);
from -= fb_line_bytes;
to -= fb_line_bytes;
}
}
}

/*=============================================================================
*
* D2_M2L_3
*
*/
static void
put_oxel_D2_M2L_3(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
#if 1
u_int16_t *addr = (u_int16_t *)xaddr;
static u_int16_t map0[] = {
0x0000, 0x0300, 0x0c00, 0x0f00, 0x3000, 0x3300, 0x3c00, 0x3f00,
0xc000, 0xc300, 0xcc00, 0xcf00, 0xf000, 0xf300, 0xfc00, 0xff00,
};
static u_int16_t map1[] = {
0x0000, 0x0003, 0x000c, 0x000f, 0x0030, 0x0033, 0x003c, 0x003f,
0x00c0, 0x00c3, 0x00cc, 0x00cf, 0x00f0, 0x00f3, 0x00fc, 0x00ff,
};
*addr = (map1[data >> 4] | map0[data & 0x0f]);
#else
static u_int8_t map[] = {
0x00, 0x03, 0x0c, 0x0f, 0x30, 0x33, 0x3c, 0x3f,
0xc0, 0xc3, 0xcc, 0xcf, 0xf0, 0xf3, 0xfc, 0xff,
};
u_int8_t *addr = xaddr;

*addr++ = (map[(data >> 4) & 0x0f] & map[(mask >> 4) & 0x0f]) |
(*addr & ~map[(mask >> 4) & 0x0f]);
*addr = (map[(data >> 0) & 0x0f] & map[(mask >> 0) & 0x0f]) |
(*addr & ~map[(mask >> 0) & 0x0f]);
#endif
}

/*=============================================================================
*
* D2_M2L_3x2
*
*/
static void
put_oxel_D2_M2L_3x2(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
register u_int8_t odd = (data & 0xaa);
register u_int8_t even = (data & 0x55);

*xaddr = (odd | (even << 1)) | ((odd >> 1) & even);
}

/*=============================================================================
*
* D2_M2L_0
*
*/
static void
put_oxel_D2_M2L_0(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
#if 1
u_int16_t *addr = (u_int16_t *)xaddr;
static u_int16_t map0[] = {
0xff00, 0xfc00, 0xf300, 0xf000, 0xcf00, 0xcc00, 0xc300, 0xc000,
0x3f00, 0x3c00, 0x3300, 0x3000, 0x0f00, 0x0c00, 0x0300, 0x0000,
};
static u_int16_t map1[] = {
0x00ff, 0x00fc, 0x00f3, 0x00f0, 0x00cf, 0x00cc, 0x00c3, 0x00c0,
0x003f, 0x003c, 0x0033, 0x0030, 0x000f, 0x000c, 0x0003, 0x0000,
};
*addr = (map1[data >> 4] | map0[data & 0x0f]);
#else
static u_int8_t map[] = {
0x00, 0x03, 0x0c, 0x0f, 0x30, 0x33, 0x3c, 0x3f,
0xc0, 0xc3, 0xcc, 0xcf, 0xf0, 0xf3, 0xfc, 0xff,
};
u_int8_t *addr = xaddr;

*addr++ = (~(map[(data >> 4) & 0x0f] & map[(mask >> 4) & 0x0f])) |
(*addr & ~map[(mask >> 4) & 0x0f]);
*addr = (~(map[(data >> 0) & 0x0f] & map[(mask >> 0) & 0x0f])) |
(*addr & ~map[(mask >> 0) & 0x0f]);
#endif
}

/*=============================================================================
*
* D2_M2L_0x2
*
*/
static void
put_oxel_D2_M2L_0x2(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
register u_int8_t odd = (data & 0xaa);
register u_int8_t even = (data & 0x55);

*xaddr = ~((odd | (even << 1)) | ((odd >> 1) & even));
}

/*=============================================================================
*
* D4_M2L_F
*
*/
static void
put_oxel_D4_M2L_F(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
u_int32_t *addr = (u_int32_t *)xaddr;
static u_int32_t map[] = {
0x0000, 0x0f00, 0xf000, 0xff00, 0x000f, 0x0f0f, 0xf00f, 0xff0f,
0x00f0, 0x0ff0, 0xf0f0, 0xfff0, 0x00ff, 0x0fff, 0xf0ff, 0xffff,
};
*addr = (map[data >> 4] | (map[data & 0x0f] << 16));
}

/*=============================================================================
*
* D4_M2L_Fx2
*
*/
static void
put_oxel_D4_M2L_Fx2(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
u_int16_t *addr = (u_int16_t *)xaddr;
static u_int16_t map[] = {
0x00, 0x08, 0x08, 0x0f, 0x80, 0x88, 0x88, 0x8f,
0x80, 0x88, 0x88, 0x8f, 0xf0, 0xf8, 0xf8, 0xff,
};

*addr = (map[data >> 4] | (map[data & 0x0f] << 8));
}

/*=============================================================================
*
* D4_M2L_0
*
*/
static void
put_oxel_D4_M2L_0(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
u_int32_t *addr = (u_int32_t *)xaddr;
static u_int32_t map[] = {
0xffff, 0xf0ff, 0x0fff, 0x00ff, 0xfff0, 0xf0f0, 0x0ff0, 0x00f0,
0xff0f, 0xf00f, 0x0f0f, 0x000f, 0xff00, 0xf000, 0x0f00, 0x0000,
};
*addr = (map[data >> 4] | (map[data & 0x0f] << 16));
}

/*=============================================================================
*
* D4_M2L_0x2
*
*/
static void
put_oxel_D4_M2L_0x2(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
u_int16_t *addr = (u_int16_t *)xaddr;
static u_int16_t map[] = {
0xff, 0xf8, 0xf8, 0xf0, 0x8f, 0x88, 0x88, 0x80,
0x8f, 0x88, 0x88, 0x80, 0x0f, 0x08, 0x08, 0x00,
};

*addr = (map[data >> 4] | (map[data & 0x0f] << 8));
}

/*=============================================================================
*
* D8_00
*
*/
static void
put_oxel_D8_00(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
int i;
u_int8_t *addr = xaddr;

for (i = 0; i < 8; i++) {
if (mask & 0x80) {
*addr = (data & 0x80) ? 0x00 : 0xFF;
}
addr++;
data <<= 1;
mask <<= 1;
}
}

/*=============================================================================
*
* D8_FF
*
*/
static void
put_oxel_D8_FF(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
int i;
u_int8_t *addr = xaddr;

for (i = 0; i < 8; i++) {
if (mask & 0x80) {
*addr = (data & 0x80) ? 0xFF : 0x00;
}
addr++;
data <<= 1;
mask <<= 1;
}
}

/*=============================================================================
*
* D16_0000
*
*/
static void
put_oxel_D16_0000(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
int i;
u_int16_t *addr = (u_int16_t *)xaddr;

for (i = 0; i < 8; i++) {
if (mask & 0x80) {
*addr = (data & 0x80) ? 0x0000 : 0xFFFF;
}
addr++;
data <<= 1;
mask <<= 1;
}
}

/*=============================================================================
*
* D16_FFFF
*
*/
static void
put_oxel_D16_FFFF(u_int8_t *xaddr, u_int8_t data, u_int8_t mask)
{
int i;
u_int16_t *addr = (u_int16_t *)xaddr;

for (i = 0; i < 8; i++) {
if (mask & 0x80) {
*addr = (data & 0x80) ? 0xFFFF : 0x0000;
}
addr++;
data <<= 1;
mask <<= 1;
}
}