* Copyright (c) 2007 Michael Lorenz

/* $NetBSD: agten.c,v 1.34 2021/08/07 16:19:15 thorpej Exp $ */

/*-
* Copyright (c) 2007 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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: agten.c,v 1.34 2021/08/07 16:19:15 thorpej Exp $");

/*
* a driver for the Fujitsu AG-10e SBus framebuffer
*
* this thing is Frankenstein's Monster among graphics boards.
* it contains three graphics chips:
* a GLint 300SX - 24bit stuff, double-buffered
* an Imagine 128 which provides an 8bit overlay
* a Weitek P9100 which provides WIDs
* so here we need to mess only with the P9100 and the I128 - for X we just
* hide the overlay and let the Xserver mess with the GLint
*/

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/mutex.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/conf.h>

#include <dev/sun/fbio.h>
#include <dev/sun/fbvar.h>
#include <dev/sun/btreg.h>
#include <dev/sun/btvar.h>

#include <sys/bus.h>
#include <machine/autoconf.h>

#include <dev/sbus/sbusvar.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/rasops/rasops.h>
#include <dev/wsfont/wsfont.h>

#include <dev/wscons/wsdisplay_vconsvar.h>
#include <dev/wscons/wsdisplay_glyphcachevar.h>

#include <dev/sbus/p9100reg.h>
#include <dev/ic/ibm561reg.h>
#include <dev/ic/i128reg.h>
#include <dev/ic/i128var.h>

#include "opt_agten.h"
#include "ioconf.h"

static int agten_match(device_t, cfdata_t, void *);
static void agten_attach(device_t, device_t, void *);

static int agten_ioctl(void *, void *, u_long, void *, int, struct lwp *);
static paddr_t agten_mmap(void *, void *, off_t, int);
static void agten_init_screen(void *, struct vcons_screen *, int, long *);

struct agten_softc {
device_t sc_dev; /* base device */
struct fbdevice sc_fb; /* frame buffer device */

struct vcons_screen sc_console_screen;
struct wsscreen_descr sc_defaultscreen_descr;
const struct wsscreen_descr *sc_screens[1];
struct wsscreen_list sc_screenlist;

bus_space_tag_t sc_bustag;

bus_space_handle_t sc_i128_fbh;
bus_size_t sc_i128_fbsz;
bus_space_handle_t sc_i128_regh;
bus_space_handle_t sc_p9100_regh;
bus_addr_t sc_glint_fb;
bus_addr_t sc_glint_regs;
uint32_t sc_glint_fbsz;

uint32_t sc_width;
uint32_t sc_height; /* panel width / height */
uint32_t sc_stride;
uint32_t sc_depth;

int sc_cursor_x;
int sc_cursor_y;
int sc_video; /* video output enabled */

/* some /dev/fb* stuff */
int sc_fb_is_open;

union bt_cmap sc_cmap; /* Brooktree color map */

int sc_mode;
uint32_t sc_bg;

void (*sc_putchar)(void *, int, int, u_int, long);

struct vcons_data vd;
glyphcache sc_gc;
};

CFATTACH_DECL_NEW(agten, sizeof(struct agten_softc),
agten_match, agten_attach, NULL, NULL);

static int agten_putcmap(struct agten_softc *, struct wsdisplay_cmap *);
static int agten_getcmap(struct agten_softc *, struct wsdisplay_cmap *);
static int agten_putpalreg(struct agten_softc *, uint8_t, uint8_t,
uint8_t, uint8_t);
static void agten_init(struct agten_softc *);
static void agten_init_cmap(struct agten_softc *, struct rasops_info *);
static void agten_gfx(struct agten_softc *);
static void agten_set_video(struct agten_softc *, int);
static int agten_get_video(struct agten_softc *);

static void agten_bitblt(void *, int, int, int, int, int, int, int);
static void agten_rectfill(void *, int, int, int, int, long);

static void agten_putchar(void *, int, int, u_int, long);
static void agten_cursor(void *, int, int, int);
static void agten_copycols(void *, int, int, int, int);
static void agten_erasecols(void *, int, int, int, long);
static void agten_copyrows(void *, int, int, int);
static void agten_eraserows(void *, int, int, long);

static void agten_move_cursor(struct agten_softc *, int, int);
static int agten_do_cursor(struct agten_softc *sc,
struct wsdisplay_cursor *);
static int agten_do_sun_cursor(struct agten_softc *sc,
struct fbcursor *);

static uint16_t util_interleave(uint8_t, uint8_t);
static uint16_t util_interleave_lin(uint8_t, uint8_t);

extern const u_char rasops_cmap[768];

struct wsdisplay_accessops agten_accessops = {
agten_ioctl,
agten_mmap,
NULL, /* alloc_screen */
NULL, /* free_screen */
NULL, /* show_screen */
NULL, /* load_font */
NULL, /* pollc */
NULL /* scroll */
};

/* /dev/fb* stuff */

static int agten_fb_open(dev_t, int, int, struct lwp *);
static int agten_fb_close(dev_t, int, int, struct lwp *);
static int agten_fb_ioctl(dev_t, u_long, void *, int, struct lwp *);
static paddr_t agten_fb_mmap(dev_t, off_t, int);
static void agten_fb_unblank(device_t);

static struct fbdriver agtenfbdriver = {
agten_fb_unblank, agten_fb_open, agten_fb_close, agten_fb_ioctl,
nopoll, agten_fb_mmap, nokqfilter
};

static inline void
agten_write_dac(struct agten_softc *sc, int reg, uint8_t val)
{
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh,
0x200 + (reg << 2), (uint32_t)val << 16);
}

static inline void
agten_write_idx(struct agten_softc *sc, int offset)
{
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh,
0x200 + (IBM561_ADDR_LOW << 2), (offset & 0xff) << 16);
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh,
0x200 + (IBM561_ADDR_HIGH << 2), ((offset >> 8) & 0xff) << 16);
}

static inline void
agten_write_dac_10(struct agten_softc *sc, int reg, uint16_t val)
{
agten_write_dac(sc, reg, (val >> 2) & 0xff);
agten_write_dac(sc, reg, (val & 0x3) << 6);
}

static int
agten_match(device_t dev, cfdata_t cf, void *aux)
{
struct sbus_attach_args *sa = aux;

if (strcmp("PFU,aga", sa->sa_name) == 0)
return 100;
return 0;
}

static void
agten_attach(device_t parent, device_t dev, void *aux)
{
struct agten_softc *sc = device_private(dev);
struct sbus_attach_args *sa = aux;
struct fbdevice *fb = &sc->sc_fb;
struct wsemuldisplaydev_attach_args aa;
struct rasops_info *ri;
long defattr;
uint32_t reg;
int node = sa->sa_node;
int console;

sc->sc_dev = dev;
sc->sc_defaultscreen_descr = (struct wsscreen_descr){
"default",
0, 0,
NULL,
8, 16,
WSSCREEN_WSCOLORS | WSSCREEN_HILIT,
NULL
};
sc->sc_screens[0] = &sc->sc_defaultscreen_descr;
sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens};
sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
sc->sc_fb_is_open = 0;
sc->sc_video = -1;
sc->sc_bustag = sa->sa_bustag;
sc->sc_putchar = NULL;

sc->sc_width = prom_getpropint(node, "ffb_width", 1152);
sc->sc_height = prom_getpropint(node, "ffb_height", 900);
sc->sc_depth = prom_getpropint(node, "ffb_depth", 8);
sc->sc_stride = sc->sc_width * (sc->sc_depth >> 3);

reg = prom_getpropint(node, "i128_fb_physaddr", -1);
sc->sc_i128_fbsz = prom_getpropint(node, "i128_fb_size", -1);
if (sbus_bus_map(sc->sc_bustag,
sa->sa_reg[0].oa_space, sa->sa_reg[0].oa_base + reg,
round_page(sc->sc_stride * sc->sc_height),
BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_LARGE,
&sc->sc_i128_fbh) != 0) {

aprint_error_dev(dev, "unable to map the framebuffer\n");
return;
}
fb->fb_pixels = bus_space_vaddr(sc->sc_bustag, sc->sc_i128_fbh);

reg = prom_getpropint(node, "i128_reg_physaddr", -1);
if (sbus_bus_map(sc->sc_bustag,
sa->sa_reg[0].oa_space, sa->sa_reg[0].oa_base + reg,
0x10000, 0, &sc->sc_i128_regh) != 0) {

aprint_error_dev(dev, "unable to map I128 registers\n");
return;
}

reg = prom_getpropint(node, "p9100_reg_physaddr", -1);
if (sbus_bus_map(sc->sc_bustag,
sa->sa_reg[0].oa_space, sa->sa_reg[0].oa_base + reg,
0x8000, 0, &sc->sc_p9100_regh) != 0) {

aprint_error_dev(dev, "unable to map P9100 registers\n");
return;
}

reg = prom_getpropint(node, "glint_fb0_physaddr", -1);
sc->sc_glint_fb = sbus_bus_addr(sc->sc_bustag,
sa->sa_reg[0].oa_space, sa->sa_reg[0].oa_base + reg);
sc->sc_glint_fbsz = prom_getpropint(node, "glint_lb_size", -1);
reg = prom_getpropint(node, "glint_reg_physaddr", -1);
sc->sc_glint_regs = sbus_bus_addr(sc->sc_bustag,
sa->sa_reg[0].oa_space, sa->sa_reg[0].oa_base + reg);

#if 0
bus_intr_establish(sc->sc_bustag, sa->sa_pri, IPL_BIO,
agten_intr, sc);
#endif

printf(": %dx%d\n", sc->sc_width, sc->sc_height);
agten_init(sc);

console = fb_is_console(node);

vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr,
&agten_accessops);
sc->vd.init_screen = agten_init_screen;

ri = &sc->sc_console_screen.scr_ri;

sc->sc_gc.gc_bitblt = agten_bitblt;
sc->sc_gc.gc_rectfill = agten_rectfill;
sc->sc_gc.gc_blitcookie = sc;
sc->sc_gc.gc_rop = CR_COPY;

#if defined(AGTEN_DEBUG)
sc->sc_height -= 200;
#endif

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

sc->sc_defaultscreen_descr.textops = &ri->ri_ops;
sc->sc_defaultscreen_descr.capabilities = ri->ri_caps;
sc->sc_defaultscreen_descr.nrows = ri->ri_rows;
sc->sc_defaultscreen_descr.ncols = ri->ri_cols;
glyphcache_init(&sc->sc_gc,
sc->sc_height + 5,
(0x400000 / sc->sc_stride) - sc->sc_height - 5,
sc->sc_width,
ri->ri_font->fontwidth,
ri->ri_font->fontheight,
defattr);

wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, 0,
defattr);
i128_rectfill(sc->sc_bustag, sc->sc_i128_regh, 0, 0,
sc->sc_width, sc->sc_height,
ri->ri_devcmap[(defattr >> 16) & 0xff]);
vcons_replay_msgbuf(&sc->sc_console_screen);
} else {
/*
* since we're not the console we can postpone the rest
* until someone actually allocates a screen for us
*/
if (sc->sc_console_screen.scr_ri.ri_rows == 0) {
/* do some minimal setup to avoid weirdnesses later */
vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1,
&defattr);
} else
(*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);

glyphcache_init(&sc->sc_gc,
sc->sc_height + 5,
(0x400000 / sc->sc_stride) - sc->sc_height - 5,
sc->sc_width,
ri->ri_font->fontwidth,
ri->ri_font->fontheight,
defattr);
}

/* Initialize the default color map. */
agten_init_cmap(sc, ri);

aa.console = console;
aa.scrdata = &sc->sc_screenlist;
aa.accessops = &agten_accessops;
aa.accesscookie = &sc->vd;

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

fb->fb_driver = &agtenfbdriver;
fb->fb_device = sc->sc_dev;
fb->fb_flags = device_cfdata(sc->sc_dev)->cf_flags & FB_USERMASK;
fb->fb_type.fb_type = FBTYPE_AG10E;
fb->fb_type.fb_cmsize = 256; /* doesn't matter, we're always 24bit */
fb->fb_type.fb_size = sc->sc_glint_fbsz;
fb->fb_type.fb_width = sc->sc_width;
fb->fb_type.fb_height = sc->sc_height;
fb->fb_type.fb_depth = 32;
fb->fb_linebytes = sc->sc_stride << 2;
fb_attach(fb, console);
agten_set_video(sc, 1); /* make sure video's on */
}

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

switch (cmd) {

case WSDISPLAYIO_GTYPE:
*(u_int *)data = WSDISPLAY_TYPE_AG10;
return 0;

case WSDISPLAYIO_GINFO:
if (ms == NULL)
return ENODEV;
wdf = (void *)data;
wdf->height = ms->scr_ri.ri_height;
wdf->width = ms->scr_ri.ri_width;
wdf->depth = 32;
wdf->cmsize = 256;
return 0;

case WSDISPLAYIO_GVIDEO:
*(int *)data = sc->sc_video;
return 0;

case WSDISPLAYIO_SVIDEO:
agten_set_video(sc, *(int *)data);
return 0;

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

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

case WSDISPLAYIO_LINEBYTES:
*(u_int *)data = sc->sc_stride << 2;
return 0;

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) {
agten_init(sc);
agten_init_cmap(sc,
&ms->scr_ri);
vcons_redraw_screen(ms);
} else {
agten_gfx(sc);
}
}
}
return 0;

case WSDISPLAYIO_GCURPOS:
{
struct wsdisplay_curpos *cp = (void *)data;

cp->x = sc->sc_cursor_x;
cp->y = sc->sc_cursor_y;
}
return 0;

case WSDISPLAYIO_SCURPOS:
{
struct wsdisplay_curpos *cp = (void *)data;

agten_move_cursor(sc, cp->x, cp->y);
}
return 0;

case WSDISPLAYIO_GCURMAX:
{
struct wsdisplay_curpos *cp = (void *)data;

cp->x = 64;
cp->y = 64;
}
return 0;

case WSDISPLAYIO_SCURSOR:
{
struct wsdisplay_cursor *cursor = (void *)data;

return agten_do_cursor(sc, cursor);
}
}
return EPASSTHROUGH;
}

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

if (offset < sc->sc_glint_fbsz)
return bus_space_mmap(sc->sc_bustag, sc->sc_glint_fb, offset,
prot, BUS_SPACE_MAP_LINEAR);
return -1;
}

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

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

ri->ri_bits = (char *)sc->sc_fb.fb_pixels;

if (existing) {
ri->ri_flg |= RI_CLEAR;
}

rasops_init(ri, 0, 0);
sc->sc_putchar = ri->ri_ops.putchar;

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.putchar = agten_putchar;
ri->ri_ops.cursor = agten_cursor;
ri->ri_ops.copyrows = agten_copyrows;
ri->ri_ops.eraserows = agten_eraserows;
ri->ri_ops.copycols = agten_copycols;
ri->ri_ops.erasecols = agten_erasecols;

}

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

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;

r = &rbuf[index];
g = &gbuf[index];
b = &bbuf[index];

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

static int
agten_getcmap(struct agten_softc *sc, struct wsdisplay_cmap *cm)
{
u_int index = cm->index;
u_int count = cm->count;
int error, i;
uint8_t red[256], green[256], blue[256];

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

i = index;
while (i < (index + count)) {
red[i] = sc->sc_cmap.cm_map[i][0];
green[i] = sc->sc_cmap.cm_map[i][1];
blue[i] = sc->sc_cmap.cm_map[i][2];
i++;
}
error = copyout(&red[index], cm->red, count);
if (error)
return error;
error = copyout(&green[index], cm->green, count);
if (error)
return error;
error = copyout(&blue[index], cm->blue, count);
if (error)
return error;

return 0;
}

static int
agten_putpalreg(struct agten_softc *sc, uint8_t idx, uint8_t r, uint8_t g,
uint8_t b)
{

sc->sc_cmap.cm_map[idx][0] = r;
sc->sc_cmap.cm_map[idx][1] = g;
sc->sc_cmap.cm_map[idx][2] = b;
agten_write_idx(sc, IBM561_CMAP_TABLE + idx);
agten_write_dac(sc, IBM561_CMD_CMAP, r);
agten_write_dac(sc, IBM561_CMD_CMAP, g);
agten_write_dac(sc, IBM561_CMD_CMAP, b);
return 0;
}

static void
agten_init(struct agten_softc *sc)
{
int i;
uint32_t src, srcw;

/* then we set up a linear LUT for 24bit colour */
agten_write_idx(sc, IBM561_CMAP_TABLE + 256);
for (i = 0; i < 256; i++) {
agten_write_dac(sc, IBM561_CMD_CMAP, i);
agten_write_dac(sc, IBM561_CMD_CMAP, i);
agten_write_dac(sc, IBM561_CMD_CMAP, i);
}

/* and the linear gamma maps */
agten_write_idx(sc, IBM561_RED_GAMMA_TABLE);
for (i = 0; i < 0x3ff; i+= 4)
agten_write_dac_10(sc, IBM561_CMD_GAMMA, i);
agten_write_idx(sc, IBM561_GREEN_GAMMA_TABLE);
for (i = 0; i < 0x3ff; i+= 4)
agten_write_dac_10(sc, IBM561_CMD_GAMMA, i);
agten_write_idx(sc, IBM561_BLUE_GAMMA_TABLE);
for (i = 0; i < 0x3ff; i+= 4)
agten_write_dac_10(sc, IBM561_CMD_GAMMA, i);

/* enable outputs, RGB mode */
agten_write_idx(sc, IBM561_CONFIG_REG3);
agten_write_dac(sc, IBM561_CMD, CR3_SERIAL_CLK_CTRL | CR3_RGB);

/* MUX 4:1 basic, 8bit overlay, 8bit WIDs */
agten_write_idx(sc, IBM561_CONFIG_REG1);
agten_write_dac(sc, IBM561_CMD, CR1_MODE_4_1_BASIC | CR1_OVL_8BPP |
CR1_WID_8);

/* use external clock, enable video output */
agten_write_idx(sc, IBM561_CONFIG_REG2);
agten_write_dac(sc, IBM561_CMD, CR2_ENABLE_CLC | CR2_PLL_REF_SELECT |
CR2_PIXEL_CLOCK_SELECT | CR2_ENABLE_RGB_OUTPUT);

/* now set up some window attributes */

/*
* direct colour, 24 bit, transparency off, LUT from 0x100
* we need to use direct colour and a linear LUT because for some
* reason true color mode gives messed up colours
*/
agten_write_idx(sc, IBM561_FB_WINTYPE);
agten_write_dac_10(sc, IBM561_CMD_FB_WAT, 0x100 | FB_PIXEL_24BIT |
FB_MODE_DIRECT);

/* use gamma LUTs, no crosshair, 0 is transparent */
agten_write_idx(sc, IBM561_AUXFB_WINTYPE);
agten_write_dac(sc, IBM561_CMD_FB_WAT, 0x0);

/* overlay is 8 bit, opaque */
agten_write_idx(sc, IBM561_OL_WINTYPE);
agten_write_dac_10(sc, IBM561_CMD_FB_WAT, 0x00);

/* now we fill the WID fb with zeroes */
src = 0;
srcw = sc->sc_width << 16 | sc->sc_height;
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh, FOREGROUND_COLOR,
0x0);
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh, BACKGROUND_COLOR,
0x0);
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh, RASTER_OP, ROP_PAT);
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh, COORD_INDEX, 0);
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh, RECT_RTW_XY, src);
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh, RECT_RTW_XY, srcw);
(void)bus_space_read_4(sc->sc_bustag, sc->sc_p9100_regh, COMMAND_QUAD);

/* initialize the cursor registers */

/* initialize the Imagine 128 */
i128_init(sc->sc_bustag, sc->sc_i128_regh, sc->sc_stride, 8);
}

static void
agten_init_cmap(struct agten_softc *sc, struct rasops_info *ri)
{
int i, j;
uint8_t cmap[768];

rasops_get_cmap(ri, cmap, 768);
j = 0;
for (i = 0; i < 256; i++) {

agten_putpalreg(sc, i, cmap[j], cmap[j + 1], cmap[j + 2]);
j += 3;
}
}

static void
agten_gfx(struct agten_softc *sc)
{
/* enable overlay transparency on colour 0x00 */
agten_write_idx(sc, IBM561_OL_WINTYPE);
agten_write_dac_10(sc, IBM561_CMD_FB_WAT, OL_MODE_TRANSP_ENABLE);

/* then blit the overlay full of 0x00 */
i128_rectfill(sc->sc_bustag, sc->sc_i128_regh, 0, 0, sc->sc_width,
sc->sc_height, 0);

/* ... so we can see the 24bit framebuffer */
}

static void
agten_set_video(struct agten_softc *sc, int flag)
{
uint8_t reg =
CR2_ENABLE_CLC | CR2_PLL_REF_SELECT | CR2_PIXEL_CLOCK_SELECT;

if (flag == sc->sc_video)
return;

agten_write_idx(sc, IBM561_CONFIG_REG2);
agten_write_dac(sc, IBM561_CMD, flag ? reg | CR2_ENABLE_RGB_OUTPUT :
reg);

sc->sc_video = flag;
}

static int
agten_get_video(struct agten_softc *sc)
{

return sc->sc_video;
}

static void
agten_bitblt(void *cookie, int xs, int ys, int xd, int yd, int wi, int he,
int rop)
{
struct agten_softc *sc = cookie;

i128_bitblt(sc->sc_bustag, sc->sc_i128_regh,
xs, ys, xd, yd, wi, he, rop);
}

static void
agten_rectfill(void *cookie, int x, int y, int wi, int he, long fg)
{
struct agten_softc *sc = cookie;
struct vcons_screen *scr = sc->vd.active;
uint32_t col;

if (scr == NULL)
return;
col = scr->scr_ri.ri_devcmap[fg];
i128_rectfill(sc->sc_bustag, sc->sc_i128_regh, x, y, wi, he, col);
}

static void
agten_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 agten_softc *sc = scr->scr_cookie;
uint32_t fg, bg;
int x, y, wi, he, rv;

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

bg = ri->ri_devcmap[(attr >> 16) & 0xf];
fg = ri->ri_devcmap[(attr >> 24) & 0xf];

x = ri->ri_xorigin + col * wi;
y = ri->ri_yorigin + row * he;

if (c == 0x20) {
i128_rectfill(sc->sc_bustag, sc->sc_i128_regh, x, y, wi, he,
bg);
if (attr & 1)
i128_rectfill(sc->sc_bustag, sc->sc_i128_regh, x,
y + he - 2, wi, 1, fg);
return;
}
rv = glyphcache_try(&sc->sc_gc, c, x, y, attr);
if (rv == GC_OK)
return;
i128_sync(sc->sc_bustag, sc->sc_i128_regh);
sc->sc_putchar(cookie, row, col, c, attr & ~1);

if (rv == GC_ADD) {
glyphcache_add(&sc->sc_gc, c, x, y);
} else {
if (attr & 1)
i128_rectfill(sc->sc_bustag, sc->sc_i128_regh, x,
y + he - 2, wi, 1, fg);
}
}

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

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

if (ri->ri_flg & RI_CURSOR) {
x = ri->ri_ccol * wi + ri->ri_xorigin;
y = ri->ri_crow * he + ri->ri_yorigin;
i128_bitblt(sc->sc_bustag, sc->sc_i128_regh, x, y, x, y, wi, he,
CR_COPY_INV);
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;
i128_bitblt(sc->sc_bustag, sc->sc_i128_regh, x, y, x, y, wi, he,
CR_COPY_INV);
ri->ri_flg |= RI_CURSOR;
}
}

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

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;
i128_bitblt(sc->sc_bustag, sc->sc_i128_regh, xs, y, xd, y, width,
height, CR_COPY);
}

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

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;
bg = (uint32_t)ri->ri_devcmap[(fillattr >> 16) & 0xff];
i128_rectfill(sc->sc_bustag, sc->sc_i128_regh, x, y, width, height, bg);
}

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

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;
i128_bitblt(sc->sc_bustag, sc->sc_i128_regh, x, ys, x, yd, width,
height, CR_COPY);
}

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

if ((row == 0) && (nrows == ri->ri_rows)) {
x = y = 0;
width = ri->ri_width;
height = ri->ri_height;
} else {
x = ri->ri_xorigin;
y = ri->ri_yorigin + ri->ri_font->fontheight * row;
width = ri->ri_emuwidth;
height = ri->ri_font->fontheight * nrows;
}
bg = (uint32_t)ri->ri_devcmap[(fillattr >> 16) & 0xff];
i128_rectfill(sc->sc_bustag, sc->sc_i128_regh, x, y, width, height, bg);
}

static void
agten_move_cursor(struct agten_softc *sc, int x, int y)
{

sc->sc_cursor_x = x;
sc->sc_cursor_y = y;
agten_write_idx(sc, IBM561_CURSOR_X_REG);
agten_write_dac(sc, IBM561_CMD, x & 0xff);
agten_write_dac(sc, IBM561_CMD, (x >> 8) & 0xff);
agten_write_dac(sc, IBM561_CMD, y & 0xff);
agten_write_dac(sc, IBM561_CMD, (y >> 8) & 0xff);
}

static int
agten_do_cursor(struct agten_softc *sc, struct wsdisplay_cursor *cur)
{
if (cur->which & WSDISPLAY_CURSOR_DOCUR) {

agten_write_idx(sc, IBM561_CURS_CNTL_REG);
agten_write_dac(sc, IBM561_CMD, cur->enable ?
CURS_ENABLE : 0);
}
if (cur->which & WSDISPLAY_CURSOR_DOHOT) {

agten_write_idx(sc, IBM561_HOTSPOT_X_REG);
agten_write_dac(sc, IBM561_CMD, cur->hot.x);
agten_write_dac(sc, IBM561_CMD, cur->hot.y);
}
if (cur->which & WSDISPLAY_CURSOR_DOPOS) {

agten_move_cursor(sc, cur->pos.x, cur->pos.y);
}
if (cur->which & WSDISPLAY_CURSOR_DOCMAP) {
int i;

agten_write_idx(sc, IBM561_CURSOR_LUT + cur->cmap.index + 2);
for (i = 0; i < cur->cmap.count; i++) {
agten_write_dac(sc, IBM561_CMD_CMAP, cur->cmap.red[i]);
agten_write_dac(sc, IBM561_CMD_CMAP,
cur->cmap.green[i]);
agten_write_dac(sc, IBM561_CMD_CMAP, cur->cmap.blue[i]);
}
}
if (cur->which & WSDISPLAY_CURSOR_DOSHAPE) {
int i;
uint16_t tmp;

agten_write_idx(sc, IBM561_CURSOR_BITMAP);
for (i = 0; i < 512; i++) {
tmp = util_interleave(cur->mask[i], cur->image[i]);
agten_write_dac(sc, IBM561_CMD, (tmp >> 8) & 0xff);
agten_write_dac(sc, IBM561_CMD, tmp & 0xff);
}
}
return 0;
}

static int
agten_do_sun_cursor(struct agten_softc *sc, struct fbcursor *cur)
{
if (cur->set & FB_CUR_SETCUR) {

agten_write_idx(sc, IBM561_CURS_CNTL_REG);
agten_write_dac(sc, IBM561_CMD, cur->enable ?
CURS_ENABLE : 0);
}
if (cur->set & FB_CUR_SETHOT) {

agten_write_idx(sc, IBM561_HOTSPOT_X_REG);
agten_write_dac(sc, IBM561_CMD, cur->hot.x);
agten_write_dac(sc, IBM561_CMD, cur->hot.y);
}
if (cur->set & FB_CUR_SETPOS) {

agten_move_cursor(sc, cur->pos.x, cur->pos.y);
}
if (cur->set & FB_CUR_SETCMAP) {
int i;

agten_write_idx(sc, IBM561_CURSOR_LUT + cur->cmap.index + 2);
for (i = 0; i < cur->cmap.count; i++) {
agten_write_dac(sc, IBM561_CMD_CMAP, cur->cmap.red[i]);
agten_write_dac(sc, IBM561_CMD_CMAP,
cur->cmap.green[i]);
agten_write_dac(sc, IBM561_CMD_CMAP, cur->cmap.blue[i]);
}
}
if (cur->set & FB_CUR_SETSHAPE) {
int i;
uint16_t tmp;

agten_write_idx(sc, IBM561_CURSOR_BITMAP);
for (i = 0; i < 512; i++) {
tmp = util_interleave_lin(cur->mask[i], cur->image[i]);
agten_write_dac(sc, IBM561_CMD, (tmp >> 8) & 0xff);
agten_write_dac(sc, IBM561_CMD, tmp & 0xff);
}
}
return 0;
}

uint16_t
util_interleave(uint8_t b1, uint8_t b2)
{
int i;
uint16_t ret = 0;
uint16_t mask = 0x8000;
uint8_t mask8 = 0x01;

for (i = 0; i < 8; i++) {
if (b1 & mask8)
ret |= mask;
mask = mask >> 1;
if (b2 & mask8)
ret |= mask;
mask = mask >> 1;
mask8 = mask8 << 1;
}
return ret;
}

uint16_t
util_interleave_lin(uint8_t b1, uint8_t b2)
{
int i;
uint16_t ret = 0;
uint16_t mask = 0x8000;
uint8_t mask8 = 0x80;

for (i = 0; i < 8; i++) {
if (b1 & mask8)
ret |= mask;
mask = mask >> 1;
if (b2 & mask8)
ret |= mask;
mask = mask >> 1;
mask8 = mask8 >> 1;
}
return ret;
}

/* and now the /dev/fb* stuff */
static void
agten_fb_unblank(device_t dev)
{
struct agten_softc *sc = device_private(dev);

agten_init(sc);
agten_set_video(sc, 1);
}

static int
agten_fb_open(dev_t dev, int flags, int mode, struct lwp *l)
{
struct agten_softc *sc;

sc = device_lookup_private(&agten_cd, minor(dev));
if (sc == NULL)
return (ENXIO);
if (sc->sc_fb_is_open)
return 0;

sc->sc_fb_is_open++;
agten_gfx(sc);

return (0);
}

static int
agten_fb_close(dev_t dev, int flags, int mode, struct lwp *l)
{
struct agten_softc *sc;

sc = device_lookup_private(&agten_cd, minor(dev));

sc->sc_fb_is_open--;
if (sc->sc_fb_is_open < 0)
sc->sc_fb_is_open = 0;

if (sc->sc_fb_is_open == 0) {
agten_init(sc);
vcons_redraw_screen(sc->vd.active);
}

return (0);
}

static int
agten_fb_ioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
{
struct agten_softc *sc = device_lookup_private(&agten_cd, minor(dev));
struct fbgattr *fba;
int error;

switch (cmd) {

case FBIOGTYPE:
*(struct fbtype *)data = sc->sc_fb.fb_type;
break;

case FBIOGATTR:
fba = (struct fbgattr *)data;
fba->real_type = sc->sc_fb.fb_type.fb_type;
fba->owner = 0; /* XXX ??? */
fba->fbtype = sc->sc_fb.fb_type;
fba->sattr.flags = 0;
fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
fba->sattr.dev_specific[0] = -1;
fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
fba->emu_types[1] = -1;
break;

case FBIOGETCMAP:
#define p ((struct fbcmap *)data)
return (bt_getcmap(p, &sc->sc_cmap, 256, 1));

case FBIOPUTCMAP:
/* copy to software map */
error = bt_putcmap(p, &sc->sc_cmap, 256, 1);
if (error)
return (error);
/* now blast them into the chip */
/* don't bother - we're 24bit */
#undef p
break;

case FBIOGVIDEO:
*(int *)data = agten_get_video(sc);
break;

case FBIOSVIDEO:
agten_set_video(sc, *(int *)data);
break;

/* these are for both FBIOSCURSOR and FBIOGCURSOR */
#define p ((struct fbcursor *)data)
#define pc (&sc->sc_cursor)

case FBIOGCURSOR:
/* does anyone use this ioctl?! */
p->set = FB_CUR_SETALL; /* close enough, anyway */
p->enable = 1;
p->pos.x = sc->sc_cursor_x;
p->pos.y = sc->sc_cursor_y;
p->size.x = 64;
p->size.y = 64;
break;

case FBIOSCURSOR:
agten_do_sun_cursor(sc, p);
break;

#undef p
#undef cc

case FBIOGCURPOS:
{
struct fbcurpos *cp = (struct fbcurpos *)data;
cp->x = sc->sc_cursor_x;
cp->y = sc->sc_cursor_y;
}
break;

case FBIOSCURPOS:
{
struct fbcurpos *cp = (struct fbcurpos *)data;
agten_move_cursor(sc, cp->x, cp->y);
}
break;

case FBIOGCURMAX:
/* max cursor size is 64x64 */
((struct fbcurpos *)data)->x = 64;
((struct fbcurpos *)data)->y = 64;
break;

default:
return (ENOTTY);
}
return (0);
}

static paddr_t
agten_fb_mmap(dev_t dev, off_t off, int prot)
{
struct agten_softc *sc = device_lookup_private(&agten_cd, minor(dev));

/*
* mappings are subject to change
* for now we put the framebuffer at offset 0 and the GLint registers
* right after that. We may want to expose more register ranges and
* probably will want to map the 2nd framebuffer as well
*/

if (off < 0)
return EINVAL;

if (off >= sc->sc_glint_fbsz + 0x10000)
return EINVAL;

if (off < sc->sc_glint_fbsz) {
return (bus_space_mmap(sc->sc_bustag,
sc->sc_glint_fb,
off,
prot,
BUS_SPACE_MAP_LINEAR));
}

off -= sc->sc_glint_fbsz;
if (off < 0x10000) {
return (bus_space_mmap(sc->sc_bustag,
sc->sc_glint_regs,
off,
prot,
BUS_SPACE_MAP_LINEAR));
}
return EINVAL;
}