* Copyright (c) 2006 Michael Lorenz

/* $NetBSD: ct65550.c,v 1.15 2021/08/07 16:19:12 thorpej Exp $ */

/*
* Copyright (c) 2006 Michael Lorenz
* 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.
*
* 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.
*/

/*
* A console driver for Chips & Technologies 65550 graphics controllers
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ct65550.c,v 1.15 2021/08/07 16:19:12 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/kauth.h>
#include <sys/bus.h>
#include <dev/videomode/videomode.h>

#include <dev/ic/ct65550reg.h>
#include <dev/ic/ct65550var.h>

#include "opt_wsemul.h"
#include "opt_chipsfb.h"

static struct vcons_screen chipsfb_console_screen;

extern const u_char rasops_cmap[768];

static void chipsfb_init(struct chipsfb_softc *);

static void chipsfb_cursor(void *, int, int, int);
static void chipsfb_copycols(void *, int, int, int, int);
static void chipsfb_erasecols(void *, int, int, int, long);
static void chipsfb_copyrows(void *, int, int, int);
static void chipsfb_eraserows(void *, int, int, long);

#if 0
static int chipsfb_allocattr(void *, int, int, int, long *);
static void chipsfb_scroll(void *, void *, int);
static int chipsfb_load_font(void *, void *, struct wsdisplay_font *);
#endif

static int chipsfb_putcmap(struct chipsfb_softc *,
struct wsdisplay_cmap *);
static int chipsfb_getcmap(struct chipsfb_softc *,
struct wsdisplay_cmap *);
static int chipsfb_putpalreg(struct chipsfb_softc *, uint8_t, uint8_t,
uint8_t, uint8_t);

static void chipsfb_bitblt(void *, int, int, int, int,
int, int, int);
static void chipsfb_rectfill(struct chipsfb_softc *, int, int, int, int,
int);
static void chipsfb_putchar(void *, int, int, u_int, long);
static void chipsfb_putchar_aa(void *, int, int, u_int, long);
static void chipsfb_setup_mono(struct chipsfb_softc *, int, int, int,
int, uint32_t, uint32_t);
static void chipsfb_feed(struct chipsfb_softc *, int, uint8_t *);

#if 0
static void chipsfb_showpal(struct chipsfb_softc *);
#endif
static void chipsfb_restore_palette(struct chipsfb_softc *);

static void chipsfb_wait_idle(struct chipsfb_softc *);

struct wsscreen_descr chipsfb_defaultscreen = {
"default", /* name */
0, 0, /* ncols, nrows */
NULL, /* textops */
8, 16, /* fontwidth, fontheight */
WSSCREEN_WSCOLORS | WSSCREEN_HILIT, /* capabilities */
NULL, /* modecookie */
};

const struct wsscreen_descr *_chipsfb_scrlist[] = {
&chipsfb_defaultscreen,
/* XXX other formats, graphics screen? */
};

struct wsscreen_list chipsfb_screenlist = {
sizeof(_chipsfb_scrlist) / sizeof(struct wsscreen_descr *), _chipsfb_scrlist
};

static int chipsfb_ioctl(void *, void *, u_long, void *, int,
struct lwp *);
static paddr_t chipsfb_mmap(void *, void *, off_t, int);
static void chipsfb_clearscreen(struct chipsfb_softc *);
static void chipsfb_init_screen(void *, struct vcons_screen *, int,
long *);

struct wsdisplay_accessops chipsfb_accessops = {
chipsfb_ioctl,
chipsfb_mmap,
NULL, /* vcons_alloc_screen */
NULL, /* vcons_free_screen */
NULL, /* vcons_show_screen */
NULL, /* load_font */
NULL, /* polls */
NULL, /* scroll */
};

/*
* Inline functions for getting access to register aperture.
*/
static inline void
chipsfb_write32(struct chipsfb_softc *sc, uint32_t reg, uint32_t val)
{
bus_space_write_4(sc->sc_memt, sc->sc_mmregh, reg, val);
}

static inline uint32_t
chipsfb_read32(struct chipsfb_softc *sc, uint32_t reg)
{
return bus_space_read_4(sc->sc_memt, sc->sc_mmregh, reg);
}

static inline void
chipsfb_write_vga(struct chipsfb_softc *sc, uint32_t reg, uint8_t val)
{
bus_space_write_1(sc->sc_iot, sc->sc_ioregh, reg, val);
}

static inline uint8_t
chipsfb_read_vga(struct chipsfb_softc *sc, uint32_t reg)
{
return bus_space_read_1(sc->sc_iot, sc->sc_ioregh, reg);
}

static inline uint8_t
chipsfb_read_indexed(struct chipsfb_softc *sc, uint32_t reg, uint8_t index)
{

chipsfb_write_vga(sc, reg & 0xfffe, index);
return chipsfb_read_vga(sc, reg | 0x0001);
}

static inline void
chipsfb_write_indexed(struct chipsfb_softc *sc, uint32_t reg, uint8_t index,
uint8_t val)
{

chipsfb_write_vga(sc, reg & 0xfffe, index);
chipsfb_write_vga(sc, reg | 0x0001, val);
}

static void
chipsfb_wait_idle(struct chipsfb_softc *sc)
{

#ifdef CHIPSFB_DEBUG
chipsfb_write32(sc, CT_OFF_FB + (800 * 598) - 4, 0);
#endif

/* spin until the blitter is idle */
while ((chipsfb_read32(sc, CT_BLT_CONTROL) & BLT_IS_BUSY) != 0) {
}

#ifdef CHIPSFB_DEBUG
chipsfb_write32(sc, CT_OFF_FB + (800 * 598) - 4, 0xffffffff);
#endif
}

void
chipsfb_do_attach(struct chipsfb_softc *sc)
{
struct wsemuldisplaydev_attach_args aa;
struct rasops_info *ri;
prop_dictionary_t dict;
ulong defattr;
bool console = false;
int width, height, i, j;
uint32_t bg, fg, ul;
uint8_t cmap[768];

dict = device_properties(sc->sc_dev);
sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
sc->sc_dacw = -1;

#ifdef CHIPSFB_DEBUG
printf(prop_dictionary_externalize(dict));
#endif
chipsfb_init(sc);

width = height = -1;

/* detect panel size */
width = chipsfb_read_indexed(sc, CT_FP_INDEX, FP_HSIZE_LSB);
width |= (chipsfb_read_indexed(sc, CT_FP_INDEX, FP_HORZ_OVERFLOW_1)
& 0x0f) << 8;
width = (width + 1) * 8;
height = chipsfb_read_indexed(sc, CT_FP_INDEX, FP_VSIZE_LSB);
height |= (chipsfb_read_indexed(sc, CT_FP_INDEX, FP_VERT_OVERFLOW_1)
& 0x0f) << 8;
height++;
if ((width < 640) || ( width > 1280) || (height < 480) ||
(height > 1024)) {
/* no sane values in the panel registers */
width = height = -1;
} else
aprint_verbose("Panel size: %d x %d\n", width, height);

if (!prop_dictionary_get_uint32(dict, "width", &sc->sc_width))
sc->sc_width = width;
if (!prop_dictionary_get_uint32(dict, "height", &sc->sc_height))
sc->sc_height = height;
if (!prop_dictionary_get_uint32(dict, "depth", &sc->sc_bits_per_pixel))
sc->sc_bits_per_pixel = 8;
if (!prop_dictionary_get_uint32(dict, "linebytes", &sc->sc_linebytes))
sc->sc_linebytes = (sc->sc_width * sc->sc_bits_per_pixel) >> 3;

prop_dictionary_get_bool(dict, "is_console", &console);

#ifdef notyet
/* XXX this should at least be configurable via kernel config */
chipsfb_set_videomode(sc, &videomode_list[16]);
#endif

vcons_init(&sc->vd, sc, &chipsfb_defaultscreen, &chipsfb_accessops);
sc->vd.init_screen = chipsfb_init_screen;

sc->sc_gc.gc_bitblt = chipsfb_bitblt;
sc->sc_gc.gc_blitcookie = sc;
sc->sc_gc.gc_rop = ROP_COPY;

ri = &chipsfb_console_screen.scr_ri;
if (console) {
vcons_init_screen(&sc->vd, &chipsfb_console_screen, 1,
&defattr);
chipsfb_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;

chipsfb_defaultscreen.textops = &ri->ri_ops;
chipsfb_defaultscreen.capabilities = ri->ri_caps;
chipsfb_defaultscreen.nrows = ri->ri_rows;
chipsfb_defaultscreen.ncols = ri->ri_cols;
glyphcache_init(&sc->sc_gc, sc->sc_height + 1,
(sc->sc_fbsize / sc->sc_linebytes) - sc->sc_height - 1,
sc->sc_width,
ri->ri_font->fontwidth,
ri->ri_font->fontheight,
defattr);
wsdisplay_cnattach(&chipsfb_defaultscreen, ri, 0, 0, defattr);
} else {
if (chipsfb_console_screen.scr_ri.ri_rows == 0) {
/* do some minimal setup to avoid weirdnesses later */
vcons_init_screen(&sc->vd, &chipsfb_console_screen, 1,
&defattr);
} else
(*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);

glyphcache_init(&sc->sc_gc, sc->sc_height + 1,
(sc->sc_fbsize / sc->sc_linebytes) - sc->sc_height - 1,
sc->sc_width,
ri->ri_font->fontwidth,
ri->ri_font->fontheight,
defattr);
}

rasops_unpack_attr(defattr, &fg, &bg, &ul);
sc->sc_bg = ri->ri_devcmap[bg];
chipsfb_clearscreen(sc);

if (console)
vcons_replay_msgbuf(&chipsfb_console_screen);

aprint_normal_dev(sc->sc_dev, "%d MB aperture, %d MB VRAM at 0x%08x\n",
(u_int)(sc->sc_fbsize >> 20),
(int)sc->memsize >> 20, (u_int)sc->sc_fb);
#ifdef CHIPSFB_DEBUG
aprint_debug("fb: %08lx\n", (ulong)ri->ri_bits);
#endif

j = 0;
rasops_get_cmap(ri, cmap, sizeof(cmap));
for (i = 0; i < 256; i++) {
chipsfb_putpalreg(sc, i, cmap[j], cmap[j + 1], cmap[j + 2]);
j += 3;
}

aa.console = console;
aa.scrdata = &chipsfb_screenlist;
aa.accessops = &chipsfb_accessops;
aa.accesscookie = &sc->vd;

config_found(sc->sc_dev, &aa, wsemuldisplaydevprint, CFARGS_NONE);
}

static int
chipsfb_putpalreg(struct chipsfb_softc *sc, uint8_t index, uint8_t r,
uint8_t g, uint8_t b)
{

sc->sc_cmap_red[index] = r;
sc->sc_cmap_green[index] = g;
sc->sc_cmap_blue[index] = b;

chipsfb_write_vga(sc, CT_DACMASK, 0xff);
chipsfb_write_vga(sc, CT_WRITEINDEX, index);
chipsfb_write_vga(sc, CT_DACDATA, r);
chipsfb_write_vga(sc, CT_DACDATA, g);
chipsfb_write_vga(sc, CT_DACDATA, b);

return 0;
}

static int
chipsfb_putcmap(struct chipsfb_softc *sc, struct wsdisplay_cmap *cm)
{
u_char *r, *g, *b;
u_int index = cm->index;
u_int count = cm->count;
int i, error;
u_char rbuf[256], gbuf[256], bbuf[256];

#ifdef CHIPSFB_DEBUG
aprint_debug("putcmap: %d %d\n",index, count);
#endif
if (cm->index >= 256 || cm->count > 256 ||
(cm->index + cm->count) > 256)
return EINVAL;
error = copyin(cm->red, &rbuf[index], count);
if (error)
return error;
error = copyin(cm->green, &gbuf[index], count);
if (error)
return error;
error = copyin(cm->blue, &bbuf[index], count);
if (error)
return error;

memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);

r = &sc->sc_cmap_red[index];
g = &sc->sc_cmap_green[index];
b = &sc->sc_cmap_blue[index];

for (i = 0; i < count; i++) {
chipsfb_putpalreg(sc, index, *r, *g, *b);
index++;
r++, g++, b++;
}
return 0;
}

static int
chipsfb_getcmap(struct chipsfb_softc *sc, struct wsdisplay_cmap *cm)
{
u_int index = cm->index;
u_int count = cm->count;
int error;

if (index >= 255 || count > 256 || index + count > 256)
return EINVAL;

error = copyout(&sc->sc_cmap_red[index], cm->red, count);
if (error)
return error;
error = copyout(&sc->sc_cmap_green[index], cm->green, count);
if (error)
return error;
error = copyout(&sc->sc_cmap_blue[index], cm->blue, count);
if (error)
return error;

return 0;
}

static void
chipsfb_clearscreen(struct chipsfb_softc *sc)
{
chipsfb_rectfill(sc, 0, 0, sc->sc_width, sc->sc_height, sc->sc_bg);
}

/*
* wsdisplay_emulops
*/

static void
chipsfb_cursor(void *cookie, int on, int row, int col)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct chipsfb_softc *sc = scr->scr_cookie;
int x, y, wi, he;

wi = ri->ri_font->fontwidth;
he = ri->ri_font->fontheight;

if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
x = ri->ri_ccol * wi + ri->ri_xorigin;
y = ri->ri_crow * he + ri->ri_yorigin;
if (ri->ri_flg & RI_CURSOR) {
chipsfb_bitblt(sc, x, y, x, y, wi, he, ROP_NOT_DST);
ri->ri_flg &= ~RI_CURSOR;
}
ri->ri_crow = row;
ri->ri_ccol = col;
if (on) {
x = ri->ri_ccol * wi + ri->ri_xorigin;
y = ri->ri_crow * he + ri->ri_yorigin;
chipsfb_bitblt(sc, x, y, x, y, wi, he, ROP_NOT_DST);
ri->ri_flg |= RI_CURSOR;
}
} else {
ri->ri_flg &= ~RI_CURSOR;
ri->ri_crow = row;
ri->ri_ccol = col;
}
}

#if 0
int
chipsfb_mapchar(void *cookie, int uni, u_int *index)
{
return 0;
}
#endif

static void
chipsfb_copycols(void *cookie, int row, int srccol, int dstcol, int ncols)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct chipsfb_softc *sc = scr->scr_cookie;
int32_t xs, xd, y, width, height;

if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
xs = ri->ri_xorigin + ri->ri_font->fontwidth * srccol;
xd = ri->ri_xorigin + ri->ri_font->fontwidth * dstcol;
y = ri->ri_yorigin + ri->ri_font->fontheight * row;
width = ri->ri_font->fontwidth * ncols;
height = ri->ri_font->fontheight;
chipsfb_bitblt(sc, xs, y, xd, y, width, height, ROP_COPY);
}
}

static void
chipsfb_erasecols(void *cookie, int row, int startcol, int ncols,
long fillattr)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct chipsfb_softc *sc = scr->scr_cookie;
int32_t x, y, width, height, fg, bg, ul;

if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
x = ri->ri_xorigin + ri->ri_font->fontwidth * startcol;
y = ri->ri_yorigin + ri->ri_font->fontheight * row;
width = ri->ri_font->fontwidth * ncols;
height = ri->ri_font->fontheight;
rasops_unpack_attr(fillattr, &fg, &bg, &ul);

chipsfb_rectfill(sc, x, y, width, height, ri->ri_devcmap[bg]);
}
}

static void
chipsfb_copyrows(void *cookie, int srcrow, int dstrow, int nrows)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct chipsfb_softc *sc = scr->scr_cookie;
int32_t x, ys, yd, width, height;

if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
x = ri->ri_xorigin;
ys = ri->ri_yorigin + ri->ri_font->fontheight * srcrow;
yd = ri->ri_yorigin + ri->ri_font->fontheight * dstrow;
width = ri->ri_emuwidth;
height = ri->ri_font->fontheight * nrows;
chipsfb_bitblt(sc, x, ys, x, yd, width, height, ROP_COPY);
}
}

static void
chipsfb_eraserows(void *cookie, int row, int nrows, long fillattr)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct chipsfb_softc *sc = scr->scr_cookie;
int32_t x, y, width, height, fg, bg, ul;

if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
rasops_unpack_attr(fillattr, &fg, &bg, &ul);
if ((row == 0) && (nrows == ri->ri_rows)) {
/* clear the whole screen */
chipsfb_rectfill(sc, 0, 0, ri->ri_width,
ri->ri_height, ri->ri_devcmap[bg]);
} else {
x = ri->ri_xorigin;
y = ri->ri_yorigin + ri->ri_font->fontheight * row;
width = ri->ri_emuwidth;
height = ri->ri_font->fontheight * nrows;
chipsfb_rectfill(sc, x, y, width, height,
ri->ri_devcmap[bg]);
}
}
}

static void
chipsfb_bitblt(void *cookie, int xs, int ys, int xd, int yd,
int width, int height, int rop)
{
struct chipsfb_softc *sc = cookie;
uint32_t src, dst, cmd = rop, stride, size;

cmd |= BLT_PAT_IS_SOLID;

/* we assume 8 bit for now */
src = xs + ys * sc->sc_linebytes;
dst = xd + yd * sc->sc_linebytes;

if (xs < xd) {
/* right-to-left operation */
cmd |= BLT_START_RIGHT;
src += width - 1;
dst += width - 1;
}

if (ys < yd) {
/* bottom-to-top operation */
cmd |= BLT_START_BOTTOM;
src += (height - 1) * sc->sc_linebytes;
dst += (height - 1) * sc->sc_linebytes;
}

stride = (sc->sc_linebytes << 16) | sc->sc_linebytes;
size = (height << 16) | width;

chipsfb_wait_idle(sc);
chipsfb_write32(sc, CT_BLT_STRIDE, stride);
chipsfb_write32(sc, CT_BLT_SRCADDR, src);
chipsfb_write32(sc, CT_BLT_DSTADDR, dst);
chipsfb_write32(sc, CT_BLT_CONTROL, cmd);
chipsfb_write32(sc, CT_BLT_SIZE, size);
#ifdef CHIPSFB_WAIT
chipsfb_wait_idle(sc);
#endif
}

static void
chipsfb_rectfill(struct chipsfb_softc *sc, int x, int y, int width,
int height, int colour)
{
uint32_t dst, cmd, stride, size;

cmd = BLT_PAT_IS_SOLID | BLT_PAT_IS_MONO | ROP_PAT;

/* we assume 8 bit for now */
dst = x + y * sc->sc_linebytes;

stride = (sc->sc_linebytes << 16) | sc->sc_linebytes;
size = (height << 16) | width;

chipsfb_wait_idle(sc);
chipsfb_write32(sc, CT_BLT_STRIDE, stride);
chipsfb_write32(sc, CT_BLT_SRCADDR, dst);
chipsfb_write32(sc, CT_BLT_DSTADDR, dst);
chipsfb_write32(sc, CT_BLT_CONTROL, cmd);
chipsfb_write32(sc, CT_BLT_BG, colour);
chipsfb_write32(sc, CT_BLT_FG, colour);
chipsfb_write32(sc, CT_BLT_SIZE, size);
#ifdef CHIPSFB_WAIT
chipsfb_wait_idle(sc);
#endif
}

static void
chipsfb_putchar_aa(void *cookie, int row, int col, u_int c, long attr)
{
struct rasops_info *ri = cookie;
struct wsdisplay_font *font = PICK_FONT(ri, c);
struct vcons_screen *scr = ri->ri_hw;
struct chipsfb_softc *sc = scr->scr_cookie;
uint32_t bg, latch = 0, bg8, fg8, pixel, dst, stride, size;
int i, l, x, y, wi, he, r, g, b, aval;
int r1, g1, b1, r0, g0, b0, fgo, bgo, off, pad;
uint8_t *data8;
int rv;

if (__predict_false((unsigned int)row > ri->ri_rows ||
(unsigned int)col > ri->ri_cols))
return;

if (__predict_false((sc->sc_mode != WSDISPLAYIO_MODE_EMUL)))
return;

if (__predict_false((!CHAR_IN_FONT(c, font))))
return;

wi = font->fontwidth;
he = font->fontheight;

bg = ri->ri_devcmap[(attr >> 16) & 0xf];
x = ri->ri_xorigin + col * wi;
y = ri->ri_yorigin + row * he;

if (c == 0x20) {
chipsfb_rectfill(sc, x, y, wi, he, bg);
return;
}

rv = glyphcache_try(&sc->sc_gc, c, x, y, attr);
if (rv == GC_OK)
return;

data8 = WSFONT_GLYPH(c, font);

/* we assume 8 bit for now */
dst = x + y * sc->sc_linebytes;

stride = sc->sc_linebytes << 16;
size = (he << 16) | wi;

/* set up for host blit */
chipsfb_wait_idle(sc);
chipsfb_write32(sc, CT_BLT_STRIDE, stride);
chipsfb_write32(sc, CT_BLT_DSTADDR, dst);
chipsfb_write32(sc, CT_BLT_SRCADDR, 0);
chipsfb_write32(sc, CT_BLT_CONTROL,
BLT_PAT_IS_SOLID | BLT_SRC_IS_CPU | ROP_COPY);
chipsfb_write32(sc, CT_BLT_SIZE, size);

/*
* we need the RGB colours here, so get offsets into rasops_cmap
*/
fgo = ((attr >> 24) & 0xf) * 3;
bgo = ((attr >> 16) & 0xf) * 3;

r0 = rasops_cmap[bgo];
r1 = rasops_cmap[fgo];
g0 = rasops_cmap[bgo + 1];
g1 = rasops_cmap[fgo + 1];
b0 = rasops_cmap[bgo + 2];
b1 = rasops_cmap[fgo + 2];
#define R3G3B2(r, g, b) ((r & 0xe0) | ((g >> 3) & 0x1c) | (b >> 6))
bg8 = R3G3B2(r0, g0, b0);
fg8 = R3G3B2(r1, g1, b1);

/* see if we need to pad lines to 64bit */
pad = (wi + 3) & 4;
for (l = 0; l < he; l++) {
off = 0;
latch = 0;
for (i = 0; i < wi; i++) {
aval = *data8;
if (aval == 0) {
pixel = bg8;
} else if (aval == 255) {
pixel = fg8;
} else {
r = aval * r1 + (255 - aval) * r0;
g = aval * g1 + (255 - aval) * g0;
b = aval * b1 + (255 - aval) * b0;
pixel = ((r & 0xe000) >> 8) |
((g & 0xe000) >> 11) |
((b & 0xc000) >> 14);
}
latch |= pixel << off;
off += 8;
/* write in 32bit chunks */
if ((i & 3) == 3) {
chipsfb_write32(sc,
CT_OFF_DATA - CT_OFF_BITBLT, latch);
latch = 0;
off = 0;
}
data8++;
}
/* if we have pixels left in latch write them out */
if ((i & 3) != 0) {
chipsfb_write32(sc, CT_OFF_DATA - CT_OFF_BITBLT, latch);
}
/* this chip needs scanlines 64bit aligned */
if (pad) chipsfb_write32(sc, CT_OFF_DATA - CT_OFF_BITBLT, 0);
}

if (rv == GC_ADD) {
glyphcache_add(&sc->sc_gc, c, x, y);
}
}

static void
chipsfb_putchar(void *cookie, int row, int col, u_int c, long attr)
{
struct rasops_info *ri = cookie;
struct wsdisplay_font *font = PICK_FONT(ri, c);
struct vcons_screen *scr = ri->ri_hw;
struct chipsfb_softc *sc = scr->scr_cookie;

if (__predict_false((unsigned int)row > ri->ri_rows ||
(unsigned int)col > ri->ri_cols))
return;

if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL) {
uint8_t *data;
int fg, bg, uc;
int x, y, wi, he;

wi = font->fontwidth;
he = font->fontheight;

if (!CHAR_IN_FONT(c, font))
return;
bg = (u_char)ri->ri_devcmap[(attr >> 16) & 0xf];
fg = (u_char)ri->ri_devcmap[(attr >> 24) & 0xf];
x = ri->ri_xorigin + col * wi;
y = ri->ri_yorigin + row * he;
if (c == 0x20) {
chipsfb_rectfill(sc, x, y, wi, he, bg);
} else {
uc = c - font->firstchar;
data = (uint8_t *)font->data + uc *
ri->ri_fontscale;
chipsfb_setup_mono(sc, x, y, wi, he, fg, bg);
chipsfb_feed(sc, font->stride * he, data);
}
}
}

static void
chipsfb_setup_mono(struct chipsfb_softc *sc, int xd, int yd, int width,
int height, uint32_t fg, uint32_t bg)
{
uint32_t dst, cmd, stride, size;

cmd = BLT_PAT_IS_SOLID | BLT_SRC_IS_CPU | BLT_SRC_IS_MONO | ROP_COPY;

/* we assume 8 bit for now */
dst = xd + yd * sc->sc_linebytes;

stride = (sc->sc_linebytes << 16);
size = (height << 16) | width;

chipsfb_wait_idle(sc);
chipsfb_write32(sc, CT_BLT_STRIDE, stride);
chipsfb_write32(sc, CT_BLT_DSTADDR, dst);
chipsfb_write32(sc, CT_BLT_SRCADDR, 0);
chipsfb_write32(sc, CT_BLT_CONTROL, cmd);
chipsfb_write32(sc, CT_BLT_BG, bg);
chipsfb_write32(sc, CT_BLT_FG, fg);
chipsfb_write32(sc, CT_BLT_SIZE, size);
}

static void
chipsfb_feed(struct chipsfb_softc *sc, int count, uint8_t *data)
{
int i;
uint32_t latch = 0, bork;
int shift = 0;

for (i = 0; i < count; i++) {
bork = data[i];
latch |= (bork << shift);
if (shift == 24) {
chipsfb_write32(sc, CT_OFF_DATA - CT_OFF_BITBLT, latch);
latch = 0;
shift = 0;
} else
shift += 8;
}

if (shift != 0) {
chipsfb_write32(sc, CT_OFF_DATA - CT_OFF_BITBLT, latch);
}

/* apparently the chip wants 64bit-aligned data or it won't go idle */
if ((count + 3) & 0x04) {
chipsfb_write32(sc, CT_OFF_DATA - CT_OFF_BITBLT, 0);
}
#ifdef CHIPSFB_WAIT
chipsfb_wait_idle(sc);
#endif
}

#if 0
static void
chipsfb_showpal(struct chipsfb_softc *sc)
{
int i, x = 0;

for (i = 0; i < 16; i++) {
chipsfb_rectfill(sc, x, 0, 64, 64, i);
x += 64;
}
}
#endif

#if 0
static int
chipsfb_allocattr(void *cookie, int fg, int bg, int flags, long *attrp)
{

return 0;
}
#endif

static void
chipsfb_restore_palette(struct chipsfb_softc *sc)
{
int i;

for (i = 0; i < 256; i++) {
chipsfb_putpalreg(sc,
i,
sc->sc_cmap_red[i],
sc->sc_cmap_green[i],
sc->sc_cmap_blue[i]);
}
}

/*
* wsdisplay_accessops
*/

static int
chipsfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
struct lwp *l)
{
struct vcons_data *vd = v;
struct chipsfb_softc *sc = vd->cookie;
struct wsdisplay_fbinfo *wdf;
struct vcons_screen *ms = vd->active;

switch (cmd) {
case WSDISPLAYIO_GTYPE:
*(u_int *)data = WSDISPLAY_TYPE_PCIMISC;
return 0;

case WSDISPLAYIO_GINFO:
wdf = (void *)data;
wdf->height = ms->scr_ri.ri_height;
wdf->width = ms->scr_ri.ri_width;
wdf->depth = ms->scr_ri.ri_depth;
wdf->cmsize = 256;
return 0;

case WSDISPLAYIO_GETCMAP:
return chipsfb_getcmap(sc,
(struct wsdisplay_cmap *)data);

case WSDISPLAYIO_PUTCMAP:
return chipsfb_putcmap(sc,
(struct wsdisplay_cmap *)data);

case WSDISPLAYIO_SMODE: {
int new_mode = *(int*)data;
if (new_mode != sc->sc_mode) {
sc->sc_mode = new_mode;
if(new_mode == WSDISPLAYIO_MODE_EMUL) {
chipsfb_init(sc);
chipsfb_restore_palette(sc);
glyphcache_wipe(&sc->sc_gc);
vcons_redraw_screen(ms);
}
}
}
return 0;

case WSDISPLAYIO_GET_FBINFO: {
struct wsdisplayio_fbinfo *fbi = data;
return wsdisplayio_get_fbinfo(&ms->scr_ri, fbi);
}

default:
if (sc->sc_ioctl != NULL)
return sc->sc_ioctl(v, vs, cmd, data, flag, l);
}
return EPASSTHROUGH;
}

static paddr_t
chipsfb_mmap(void *v, void *vs, off_t offset, int prot)
{
struct vcons_data *vd = v;
struct chipsfb_softc *sc = vd->cookie;
paddr_t pa;

if (sc->sc_mmap != NULL) {
pa = sc->sc_mmap(v, vs, offset, prot);
if (pa != -1) return pa;
}

/* 'regular' framebuffer mmap()ing */
if (offset < sc->memsize) {
pa = bus_space_mmap(sc->sc_memt, sc->sc_fb, offset, prot,
BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE);
return pa;
}

/*
* restrict all other mappings to processes with superuser privileges
* or the kernel itself
*/
if (kauth_authorize_machdep(kauth_cred_get(), KAUTH_MACHDEP_UNMANAGEDMEM,
NULL, NULL, NULL, NULL) != 0) {
aprint_normal_dev(sc->sc_dev, "mmap() rejected.\n");
return -1;
}

if ((offset >= sc->sc_fb) && (offset < (sc->sc_fb + sc->sc_fbsize))) {
pa = bus_space_mmap(sc->sc_memt, offset, 0, prot,
BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE);
return pa;
}

#ifdef PCI_MAGIC_IO_RANGE
/* allow mapping of IO space */
if ((offset >= PCI_MAGIC_IO_RANGE) &&
(offset < PCI_MAGIC_IO_RANGE + 0x10000)) {
pa = bus_space_mmap(sc->sc_iot, offset - PCI_MAGIC_IO_RANGE,
0, prot, BUS_SPACE_MAP_LINEAR);
return pa;
}
#endif

return -1;
}

static void
chipsfb_init_screen(void *cookie, struct vcons_screen *scr,
int existing, long *defattr)
{
struct chipsfb_softc *sc = cookie;
struct rasops_info *ri = &scr->scr_ri;

ri->ri_depth = sc->sc_bits_per_pixel;
ri->ri_width = sc->sc_width;
ri->ri_height = sc->sc_height;
ri->ri_stride = sc->sc_width;
ri->ri_flg = RI_CENTER | RI_FULLCLEAR |
RI_8BIT_IS_RGB | RI_ENABLE_ALPHA;

ri->ri_bits = bus_space_vaddr(sc->sc_memt, sc->sc_fbh);

#ifdef CHIPSFB_DEBUG
aprint_debug("addr: %08lx\n", (ulong)ri->ri_bits);
#endif
if (existing) {
ri->ri_flg |= RI_CLEAR;
}

rasops_init(ri, 0, 0);
ri->ri_caps = WSSCREEN_WSCOLORS;

rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
sc->sc_width / ri->ri_font->fontwidth);

ri->ri_hw = scr;
ri->ri_ops.copyrows = chipsfb_copyrows;
ri->ri_ops.copycols = chipsfb_copycols;
ri->ri_ops.eraserows = chipsfb_eraserows;
ri->ri_ops.erasecols = chipsfb_erasecols;
ri->ri_ops.cursor = chipsfb_cursor;
if (FONT_IS_ALPHA(ri->ri_font)) {
ri->ri_ops.putchar = chipsfb_putchar_aa;
} else
ri->ri_ops.putchar = chipsfb_putchar;
}

#if 0
int
chipsfb_load_font(void *v, void *cookie, struct wsdisplay_font *data)
{

return 0;
}
#endif

static void
chipsfb_init(struct chipsfb_softc *sc)
{
uint8_t reg;

chipsfb_wait_idle(sc);

/* setup the blitter */
chipsfb_write32(sc, CT_BLT_EXPCTL, MONO_SRC_ALIGN_BYTE);

/* put DAC into 8bit mode */
reg = chipsfb_read_indexed(sc, CT_CONF_INDEX, XR_PIXEL_PIPELINE_CTL_0);
reg |= ENABLE_8BIT_DAC;
chipsfb_write_indexed(sc, CT_CONF_INDEX, XR_PIXEL_PIPELINE_CTL_0, reg);
}

uint32_t
chipsfb_probe_vram(struct chipsfb_softc *sc)
{
uint32_t ofs = 0x00080000; /* 512kB */

/*
* advance in 0.5MB steps, see if we can read back what we wrote and
* if what we wrote to 0 is left untouched. Max. fb size is 4MB so
* we voluntarily stop there.
*/
bus_space_write_4(sc->sc_memt, sc->sc_fbh, 0, 0xf0f0f0f0);
bus_space_write_4(sc->sc_memt, sc->sc_fbh, ofs, 0x0f0f0f0f);
while ((bus_space_read_4(sc->sc_memt, sc->sc_fbh, 0) == 0xf0f0f0f0) &&
(bus_space_read_4(sc->sc_memt, sc->sc_fbh, ofs) == 0x0f0f0f0f) &&
(ofs < 0x00400000)) {

ofs += 0x00080000;
bus_space_write_4(sc->sc_memt, sc->sc_fbh, ofs, 0x0f0f0f0f);
}

return ofs;
}