* Copyright (c) 1999, 2000, 2001 The NetBSD Foundation, Inc.

/* $NetBSD: sfbplus.c,v 1.42 2021/12/06 17:43:50 abs Exp $ */

/*-
* Copyright (c) 1999, 2000, 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tohru Nishimura.
*
* 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: sfbplus.c,v 1.42 2021/12/06 17:43:50 abs Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/ioctl.h>

#include <sys/bus.h>
#include <sys/intr.h>

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

#include <dev/rasops/rasops.h>
#include <dev/wsfont/wsfont.h>

#include <dev/tc/tcvar.h>
#include <dev/ic/bt459reg.h>
#include <dev/ic/bt463reg.h>
#include <dev/tc/sfbreg.h>
#include <dev/pci/tgareg.h>

#if defined(pmax)
#define machine_btop(x) mips_btop(MIPS_KSEG1_TO_PHYS(x))
#endif

#if defined(alpha)
#define machine_btop(x) alpha_btop(ALPHA_K0SEG_TO_PHYS(x))
#endif

/* Bt459/Bt463 hardware registers */
#define bt_lo 0
#define bt_hi 1
#define bt_reg 2
#define bt_cmap 3

#define REG(base, index) *((uint32_t *)(base) + (index))
#define SELECT(vdac, regno) do { \
REG(vdac, bt_lo) = ((regno) & 0x00ff); \
REG(vdac, bt_hi) = ((regno) & 0x0f00) >> 8; \
tc_wmb(); \
} while (0)

struct hwcmap256 {
#define CMAP_SIZE 256 /* 256 R/G/B entries */
uint8_t r[CMAP_SIZE];
uint8_t g[CMAP_SIZE];
uint8_t b[CMAP_SIZE];
};

struct hwcursor64 {
struct wsdisplay_curpos cc_pos;
struct wsdisplay_curpos cc_hot;
struct wsdisplay_curpos cc_size;
struct wsdisplay_curpos cc_magic;
#define CURSOR_MAX_SIZE 64
uint8_t cc_color[6];
uint64_t cc_image[CURSOR_MAX_SIZE];
uint64_t cc_mask[CURSOR_MAX_SIZE];
};

struct hwops {
void (*setlut)(void *, struct hwcmap256 *);
void (*getlut)(void *, struct hwcmap256 *);
void (*visible)(void *, int);
void (*locate)(void *, struct hwcursor64 *);
void (*shape)(void *, struct wsdisplay_curpos *, uint64_t *);
void (*color)(void *, uint8_t *);
};

struct sfbp_softc {
vaddr_t sc_vaddr;
size_t sc_size;
struct rasops_info *sc_ri;
struct hwcmap256 sc_cmap; /* software copy of colormap */
struct hwcursor64 sc_cursor; /* software copy of cursor */
int sc_blanked;
int sc_curenb; /* cursor sprite enabled */
int sc_changed; /* need update of hardware */
#define WSDISPLAY_CMAP_DOLUT 0x20
int nscreens;
struct hwops sc_hwops;
};

#define HX_MAGIC_X 368
#define HX_MAGIC_Y 38

static int sfbpmatch(device_t, cfdata_t, void *);
static void sfbpattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(sfbp, sizeof(struct sfbp_softc),
sfbpmatch, sfbpattach, NULL, NULL);

static void sfbp_common_init(struct rasops_info *);
static struct rasops_info sfbp_console_ri;
static tc_addr_t sfbp_consaddr;

static struct wsscreen_descr sfbp_stdscreen = {
"std", 0, 0,
NULL, /* textops */
0, 0,
WSSCREEN_REVERSE
};

static const struct wsscreen_descr *_sfb_scrlist[] = {
&sfbp_stdscreen,
};

static const struct wsscreen_list sfb_screenlist = {
sizeof(_sfb_scrlist) / sizeof(struct wsscreen_descr *), _sfb_scrlist
};

static int sfbioctl(void *, void *, u_long, void *, int, struct lwp *);
static paddr_t sfbmmap(void *, void *, off_t, int);

static int sfb_alloc_screen(void *, const struct wsscreen_descr *,
void **, int *, int *, long *);
static void sfb_free_screen(void *, void *);
static int sfb_show_screen(void *, void *, int,
void (*) (void *, int, int), void *);
static void sfbp_putchar(void *, int, int, u_int, long);
static void sfbp_erasecols(void *, int, int, int, long);
static void sfbp_eraserows(void *, int, int, long);
static void sfbp_copyrows(void *, int, int, int);

static const struct wsdisplay_accessops sfb_accessops = {
sfbioctl,
sfbmmap,
sfb_alloc_screen,
sfb_free_screen,
sfb_show_screen,
0 /* load_font */
};

static void bt459init(void *);
static void bt459visible(void *, int);
static void bt459locate(void *, struct hwcursor64 *);
static void bt459shape(void *, struct wsdisplay_curpos *, uint64_t *);
static void bt459color(void *, uint8_t *);
static void bt459setlut(void *, struct hwcmap256 *);

static void sfbpvisible(void *, int);
static void sfbplocate(void *, struct hwcursor64 *);
static void sfbpshape(void *, struct wsdisplay_curpos *, uint64_t *);
static void bt463init(void *);
static void bt463color(void *, uint8_t *);
static void noplut(void *, struct hwcmap256 *);

/* EXPORT */ int sfbp_cnattach(tc_addr_t);
static int sfbpintr(void *);
static void sfbp_cmap_init(struct sfbp_softc *);

static int get_cmap(struct sfbp_softc *, struct wsdisplay_cmap *);
static int set_cmap(struct sfbp_softc *, struct wsdisplay_cmap *);
static int set_cursor(struct sfbp_softc *, struct wsdisplay_cursor *);
static int get_cursor(struct sfbp_softc *, struct wsdisplay_cursor *);
static void set_curpos(struct sfbp_softc *, struct wsdisplay_curpos *);

/*
* Compose 2 bit/pixel cursor image. Bit order will be reversed.
* M M M M I I I I M I M I M I M I
* [ before ] [ after ]
* 3 2 1 0 3 2 1 0 0 0 1 1 2 2 3 3
* 7 6 5 4 7 6 5 4 4 4 5 5 6 6 7 7
*/
static const uint8_t shuffle[256] = {
0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55,
0x80, 0xc0, 0x90, 0xd0, 0x84, 0xc4, 0x94, 0xd4,
0x81, 0xc1, 0x91, 0xd1, 0x85, 0xc5, 0x95, 0xd5,
0x20, 0x60, 0x30, 0x70, 0x24, 0x64, 0x34, 0x74,
0x21, 0x61, 0x31, 0x71, 0x25, 0x65, 0x35, 0x75,
0xa0, 0xe0, 0xb0, 0xf0, 0xa4, 0xe4, 0xb4, 0xf4,
0xa1, 0xe1, 0xb1, 0xf1, 0xa5, 0xe5, 0xb5, 0xf5,
0x08, 0x48, 0x18, 0x58, 0x0c, 0x4c, 0x1c, 0x5c,
0x09, 0x49, 0x19, 0x59, 0x0d, 0x4d, 0x1d, 0x5d,
0x88, 0xc8, 0x98, 0xd8, 0x8c, 0xcc, 0x9c, 0xdc,
0x89, 0xc9, 0x99, 0xd9, 0x8d, 0xcd, 0x9d, 0xdd,
0x28, 0x68, 0x38, 0x78, 0x2c, 0x6c, 0x3c, 0x7c,
0x29, 0x69, 0x39, 0x79, 0x2d, 0x6d, 0x3d, 0x7d,
0xa8, 0xe8, 0xb8, 0xf8, 0xac, 0xec, 0xbc, 0xfc,
0xa9, 0xe9, 0xb9, 0xf9, 0xad, 0xed, 0xbd, 0xfd,
0x02, 0x42, 0x12, 0x52, 0x06, 0x46, 0x16, 0x56,
0x03, 0x43, 0x13, 0x53, 0x07, 0x47, 0x17, 0x57,
0x82, 0xc2, 0x92, 0xd2, 0x86, 0xc6, 0x96, 0xd6,
0x83, 0xc3, 0x93, 0xd3, 0x87, 0xc7, 0x97, 0xd7,
0x22, 0x62, 0x32, 0x72, 0x26, 0x66, 0x36, 0x76,
0x23, 0x63, 0x33, 0x73, 0x27, 0x67, 0x37, 0x77,
0xa2, 0xe2, 0xb2, 0xf2, 0xa6, 0xe6, 0xb6, 0xf6,
0xa3, 0xe3, 0xb3, 0xf3, 0xa7, 0xe7, 0xb7, 0xf7,
0x0a, 0x4a, 0x1a, 0x5a, 0x0e, 0x4e, 0x1e, 0x5e,
0x0b, 0x4b, 0x1b, 0x5b, 0x0f, 0x4f, 0x1f, 0x5f,
0x8a, 0xca, 0x9a, 0xda, 0x8e, 0xce, 0x9e, 0xde,
0x8b, 0xcb, 0x9b, 0xdb, 0x8f, 0xcf, 0x9f, 0xdf,
0x2a, 0x6a, 0x3a, 0x7a, 0x2e, 0x6e, 0x3e, 0x7e,
0x2b, 0x6b, 0x3b, 0x7b, 0x2f, 0x6f, 0x3f, 0x7f,
0xaa, 0xea, 0xba, 0xfa, 0xae, 0xee, 0xbe, 0xfe,
0xab, 0xeb, 0xbb, 0xfb, 0xaf, 0xef, 0xbf, 0xff,
};

static int
sfbpmatch(device_t parent, cfdata_t match, void *aux)
{
struct tc_attach_args *ta = aux;

if (strncmp("PMAGD ", ta->ta_modname, TC_ROM_LLEN) != 0)
return (0);

return (1);
}

static void
sfbpattach(device_t parent, device_t self, void *aux)
{
struct sfbp_softc *sc = device_private(self);
struct tc_attach_args *ta = aux;
struct rasops_info *ri;
struct wsemuldisplaydev_attach_args waa;
char *asic;
int console;

console = (ta->ta_addr == sfbp_consaddr);
if (console) {
sc->sc_ri = ri = &sfbp_console_ri;
ri->ri_flg &= ~RI_NO_AUTO;
sc->nscreens = 1;
}
else {
ri = malloc(sizeof(struct rasops_info), M_DEVBUF, M_WAITOK | M_ZERO);
ri->ri_hw = (void *)ta->ta_addr;
sfbp_common_init(ri);
sc->sc_ri = ri;
}
printf(": %dx%d, %dbpp\n", ri->ri_width, ri->ri_height,
(ri->ri_depth != 32) ? 8 : 24);

sc->sc_vaddr = ta->ta_addr;
sc->sc_cursor.cc_magic.x = HX_MAGIC_X;
sc->sc_cursor.cc_magic.y = HX_MAGIC_Y;
sc->sc_blanked = sc->sc_curenb = 0;

if (ri->ri_depth == 8) {
sc->sc_hwops.visible = bt459visible;
sc->sc_hwops.locate = bt459locate;
sc->sc_hwops.shape = bt459shape;
sc->sc_hwops.color = bt459color;
sc->sc_hwops.setlut = bt459setlut;
sc->sc_hwops.getlut = noplut;
} else {
sc->sc_hwops.visible = sfbpvisible;
sc->sc_hwops.locate = sfbplocate;
sc->sc_hwops.shape = sfbpshape;
sc->sc_hwops.color = bt463color;
sc->sc_hwops.setlut = noplut;
sc->sc_hwops.getlut = noplut;
}
sfbp_cmap_init(sc);

tc_intr_establish(parent, ta->ta_cookie, IPL_TTY, sfbpintr, sc);

asic = (char *)ri->ri_hw + SFB_ASIC_OFFSET;
*(uint32_t *)(asic + SFB_ASIC_CLEAR_INTR) = 0;
*(uint32_t *)(asic + SFB_ASIC_ENABLE_INTR) = 1;

waa.console = console;
waa.scrdata = &sfb_screenlist;
waa.accessops = &sfb_accessops;
waa.accesscookie = sc;

config_found(self, &waa, wsemuldisplaydevprint, CFARGS_NONE);
}

static void
sfbp_cmap_init(struct sfbp_softc *sc)
{
struct hwcmap256 *cm;
const uint8_t *p;
int index;

if (sc->sc_ri->ri_depth != 8)
return;

cm = &sc->sc_cmap;
p = rasops_cmap;
for (index = 0; index < CMAP_SIZE; index++, p += 3) {
cm->r[index] = p[0];
cm->g[index] = p[1];
cm->b[index] = p[2];
}
}

static void
sfbp_common_init(struct rasops_info *ri)
{
char *base, *asic;
int i, depth, hsetup, vsetup, vbase, cookie;

base = ri->ri_hw;
asic = base + SFB_ASIC_OFFSET;
hsetup = *(uint32_t *)(asic + SFB_ASIC_VIDEO_HSETUP);
vsetup = *(uint32_t *)(asic + SFB_ASIC_VIDEO_VSETUP);
i = *(uint32_t *)(asic + SFB_ASIC_DEEP);
depth = (i & 01) ? 32 : 8;

/*
* - neglect 0,1 cases of hsetup register.
* - observed 804x600?, 644x480? values.
*/

*(uint32_t *)(asic + SFB_ASIC_VIDEO_BASE) = vbase = 1;
vbase *= (i & 0x20) ? 2048 : 4096; /* VRAM chip size */
if (i & 1) vbase *= 4; /* bytes per pixel */

*(uint32_t *)(asic + SFB_ASIC_PLANEMASK) = ~0;
*(uint32_t *)(asic + SFB_ASIC_PIXELMASK) = ~0;
*(uint32_t *)(asic + SFB_ASIC_MODE) = 0; /* MODE_SIMPLE */
*(uint32_t *)(asic + SFB_ASIC_ROP) = 3; /* ROP_COPY */

/* initialize colormap and cursor hardware */
if (depth != 32) {
*(uint32_t *)(asic + 0x180000) = 0; /* Bt459 reset */
bt459init(base + SFB_RAMDAC_OFFSET);
}
else {
bt463init(base + SFB_RAMDAC_OFFSET);
}

ri->ri_flg = RI_CENTER;
if (ri == &sfbp_console_ri)
ri->ri_flg |= RI_NO_AUTO;
ri->ri_flg = 0; /* XXX 32bpp RI_CENTER fails XXX */
ri->ri_depth = depth;
ri->ri_width = (hsetup & 0x1ff) << 2;
ri->ri_height = (vsetup & 0x7ff);
ri->ri_stride = ri->ri_width * (ri->ri_depth / 8);
ri->ri_bits = base + 0x800000 + vbase;

if (depth == 32) {
ri->ri_rnum = 8;
ri->ri_gnum = 8;
ri->ri_bnum = 8;
ri->ri_rpos = 16;
ri->ri_gpos = 8;
ri->ri_bpos = 0;
}

/* clear the screen */
memset(ri->ri_bits, 0, ri->ri_stride * ri->ri_height);

wsfont_init();
/* prefer 12 pixel wide font */
cookie = wsfont_find(NULL, 12, 0, 0, WSDISPLAY_FONTORDER_R2L,
WSDISPLAY_FONTORDER_L2R, WSFONT_FIND_BITMAP);
if (cookie <= 0)
cookie = wsfont_find(NULL, 0, 0, 0, WSDISPLAY_FONTORDER_R2L,
WSDISPLAY_FONTORDER_L2R, WSFONT_FIND_BITMAP);
if (cookie <= 0) {
printf("sfbp: font table is empty\n");
return;
}

/* the accelerated sfbp_putchar() needs LSbit left */
if (wsfont_lock(cookie, &ri->ri_font)) {
printf("sfb: couldn't lock font\n");
return;
}
ri->ri_wsfcookie = cookie;

rasops_init(ri, 34, 80);

/* add our accelerated functions */
ri->ri_ops.putchar = sfbp_putchar;
ri->ri_ops.erasecols = sfbp_erasecols;
ri->ri_ops.copyrows = sfbp_copyrows;
ri->ri_ops.eraserows = sfbp_eraserows;

/* XXX shouldn't be global */
sfbp_stdscreen.nrows = ri->ri_rows;
sfbp_stdscreen.ncols = ri->ri_cols;
sfbp_stdscreen.textops = &ri->ri_ops;
sfbp_stdscreen.capabilities = ri->ri_caps;
/* our accelerated putchar can't underline */
sfbp_stdscreen.capabilities &= ~WSSCREEN_UNDERLINE;
}

static int
sfbioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
{
struct sfbp_softc *sc = v;
struct rasops_info *ri = sc->sc_ri;
int turnoff, s;

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

case WSDISPLAYIO_GET_FBINFO: {
struct wsdisplayio_fbinfo *fbi = data;
return wsdisplayio_get_fbinfo(sc->sc_ri, fbi);
}

case WSDISPLAYIO_GINFO:
#define wsd_fbip ((struct wsdisplay_fbinfo *)data)
wsd_fbip->height = ri->ri_height;
wsd_fbip->width = ri->ri_width;
wsd_fbip->depth = ri->ri_depth;
wsd_fbip->cmsize = CMAP_SIZE; /* XXX */
#undef fbt
return (0);

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

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

case WSDISPLAYIO_SVIDEO:
turnoff = *(int *)data == WSDISPLAYIO_VIDEO_OFF;
if ((sc->sc_blanked == 0) ^ turnoff) {
sc->sc_blanked = turnoff;
#if 0 /* XXX later XXX */
Low order 3bit control visibilities of screen and builtin cursor.
#endif /* XXX XXX XXX */
}
return (0);

case WSDISPLAYIO_GVIDEO:
*(u_int *)data = sc->sc_blanked ?
WSDISPLAYIO_VIDEO_OFF : WSDISPLAYIO_VIDEO_ON;
return (0);

case WSDISPLAYIO_GCURPOS:
*(struct wsdisplay_curpos *)data = sc->sc_cursor.cc_pos;
return (0);

case WSDISPLAYIO_SCURPOS:
s = spltty();
set_curpos(sc, (struct wsdisplay_curpos *)data);
sc->sc_changed |= WSDISPLAY_CURSOR_DOPOS;
splx(s);
return (0);

case WSDISPLAYIO_GCURMAX:
((struct wsdisplay_curpos *)data)->x =
((struct wsdisplay_curpos *)data)->y = CURSOR_MAX_SIZE;
return (0);

case WSDISPLAYIO_GCURSOR:
return get_cursor(sc, (struct wsdisplay_cursor *)data);

case WSDISPLAYIO_SCURSOR:
return set_cursor(sc, (struct wsdisplay_cursor *)data);

case WSDISPLAYIO_SMODE:
if (*(int *)data == WSDISPLAYIO_MODE_EMUL) {
s = spltty();
sfbp_cmap_init(sc);
sc->sc_curenb = 0;
sc->sc_changed |= (WSDISPLAY_CURSOR_DOCUR |
WSDISPLAY_CMAP_DOLUT);
splx(s);
}
return (0);
}
return (EPASSTHROUGH);
}

paddr_t
sfbmmap(void *v, void *vs, off_t offset, int prot)
{
struct sfbp_softc *sc = v;

if (offset >= 0x1000000 || offset < 0) /* XXX 16MB XXX */
return (-1);
return machine_btop(sc->sc_vaddr + offset);
}

static int
sfb_alloc_screen(void *v, const struct wsscreen_descr *type, void **cookiep,
int *curxp, int *curyp, long *attrp)
{
struct sfbp_softc *sc = v;
struct rasops_info *ri = sc->sc_ri;
long defattr;

if (sc->nscreens > 0)
return (ENOMEM);

*cookiep = ri; /* one and only for now */
*curxp = 0;
*curyp = 0;
(*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);
*attrp = defattr;
sc->nscreens++;
return (0);
}

void
sfb_free_screen(void *v, void *cookie)
{
struct sfbp_softc *sc = v;

if (sc->sc_ri == &sfbp_console_ri)
panic("sfb_free_screen: console");

sc->nscreens--;
}

static int
sfb_show_screen(void *v, void *cookie, int waitok,
void (*cb)(void *, int, int), void *cbarg)
{

return (0);
}

int
sfbp_cnattach(tc_addr_t addr)
{
struct rasops_info *ri;
long defattr;

ri = &sfbp_console_ri;
ri->ri_hw = (void *)addr;
sfbp_common_init(ri);
(*ri->ri_ops.allocattr)(&ri, 0, 0, 0, &defattr);
wsdisplay_cnattach(&sfbp_stdscreen, ri, 0, 0, defattr);
sfbp_consaddr = addr;
return (0);
}

static int
sfbpintr(void *arg)
{
#define cc (&sc->sc_cursor)
struct sfbp_softc *sc = arg;
char *base, *asic;
uint32_t sisr;
int v;

base = sc->sc_ri->ri_hw;
asic = base + SFB_ASIC_OFFSET;
sisr = *((uint32_t *)asic + TGA_REG_SISR);
*(uint32_t *)(asic + SFB_ASIC_CLEAR_INTR) = 0;

if (sc->sc_changed == 0)
goto done;

v = sc->sc_changed;
if (v & WSDISPLAY_CURSOR_DOCUR)
(*sc->sc_hwops.visible)(base, sc->sc_curenb);
if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOHOT))
(*sc->sc_hwops.locate)(base, cc);
if (v & WSDISPLAY_CURSOR_DOCMAP)
(*sc->sc_hwops.color)(base, cc->cc_color);
if (v & WSDISPLAY_CURSOR_DOSHAPE)
(*sc->sc_hwops.shape)(base, &cc->cc_size, cc->cc_image);
if (v & WSDISPLAY_CMAP_DOLUT)
(*sc->sc_hwops.setlut)(base, &sc->sc_cmap);
sc->sc_changed = 0;
done:
*((uint32_t *)asic + TGA_REG_SISR) = sisr = 0x00000001; tc_wmb();
return (1);
#undef cc
}

static void
bt459init(void *vdac)
{
const uint8_t *p;
int i;

SELECT(vdac, BT459_IREG_COMMAND_0);
REG(vdac, bt_reg) = 0x40; /* CMD0 */ tc_wmb();
REG(vdac, bt_reg) = 0x0; /* CMD1 */ tc_wmb();
REG(vdac, bt_reg) = 0xc0; /* CMD2 */ tc_wmb();
REG(vdac, bt_reg) = 0xff; /* PRM */ tc_wmb();
REG(vdac, bt_reg) = 0; /* 205 */ tc_wmb();
REG(vdac, bt_reg) = 0x0; /* PBM */ tc_wmb();
REG(vdac, bt_reg) = 0; /* 207 */ tc_wmb();
REG(vdac, bt_reg) = 0x0; /* ORM */ tc_wmb();
REG(vdac, bt_reg) = 0x0; /* OBM */ tc_wmb();
REG(vdac, bt_reg) = 0x0; /* ILV */ tc_wmb();
REG(vdac, bt_reg) = 0x0; /* TEST */ tc_wmb();

SELECT(vdac, BT459_IREG_CCR);
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();
REG(vdac, bt_reg) = 0x0; tc_wmb();

/* build sane colormap */
SELECT(vdac, 0);
p = rasops_cmap;
for (i = 0; i < CMAP_SIZE; i++, p += 3) {
REG(vdac, bt_cmap) = p[0]; tc_wmb();
REG(vdac, bt_cmap) = p[1]; tc_wmb();
REG(vdac, bt_cmap) = p[2]; tc_wmb();
}

/* clear out cursor image */
SELECT(vdac, BT459_IREG_CRAM_BASE);
for (i = 0; i < 1024; i++)
REG(vdac, bt_reg) = 0xff; tc_wmb();

/*
* 2 bit/pixel cursor. Assign MSB for cursor mask and LSB for
* cursor image. CCOLOR_2 for mask color, while CCOLOR_3 for
* image color. CCOLOR_1 will be never used.
*/
SELECT(vdac, BT459_IREG_CCOLOR_1);
REG(vdac, bt_reg) = 0xff; tc_wmb();
REG(vdac, bt_reg) = 0xff; tc_wmb();
REG(vdac, bt_reg) = 0xff; tc_wmb();

REG(vdac, bt_reg) = 0; tc_wmb();
REG(vdac, bt_reg) = 0; tc_wmb();
REG(vdac, bt_reg) = 0; tc_wmb();

REG(vdac, bt_reg) = 0xff; tc_wmb();
REG(vdac, bt_reg) = 0xff; tc_wmb();
REG(vdac, bt_reg) = 0xff; tc_wmb();
}

static void
bt463init(void *vdac)
{
int i;

SELECT(vdac, BT463_IREG_COMMAND_0);
REG(vdac, bt_reg) = 0x40; tc_wmb(); /* CMD 0 */
REG(vdac, bt_reg) = 0x48; tc_wmb(); /* CMD 1 */
REG(vdac, bt_reg) = 0xc0; tc_wmb(); /* CMD 2 */
REG(vdac, bt_reg) = 0; tc_wmb(); /* !? 204 !? */
REG(vdac, bt_reg) = 0xff; tc_wmb(); /* plane 0:7 */
REG(vdac, bt_reg) = 0xff; tc_wmb(); /* plane 8:15 */
REG(vdac, bt_reg) = 0xff; tc_wmb(); /* plane 16:23 */
REG(vdac, bt_reg) = 0xff; tc_wmb(); /* plane 24:27 */
REG(vdac, bt_reg) = 0x00; tc_wmb(); /* blink 0:7 */
REG(vdac, bt_reg) = 0x00; tc_wmb(); /* blink 8:15 */
REG(vdac, bt_reg) = 0x00; tc_wmb(); /* blink 16:23 */
REG(vdac, bt_reg) = 0x00; tc_wmb(); /* blink 24:27 */
REG(vdac, bt_reg) = 0x00; tc_wmb();

SELECT(vdac, BT463_IREG_WINDOW_TYPE_TABLE);
for (i = 0; i < BT463_NWTYPE_ENTRIES; i++) {
REG(vdac, bt_reg) = 0x00; /* 0:7 */
REG(vdac, bt_reg) = 0xe1; /* 8:15 */
REG(vdac, bt_reg) = 0x81; /* 16:23 */
}
}

static int
get_cmap(struct sfbp_softc *sc, struct wsdisplay_cmap *p)
{
u_int index = p->index, count = p->count;
int error;

if (index >= CMAP_SIZE || count > CMAP_SIZE - index)
return (EINVAL);

error = copyout(&sc->sc_cmap.r[index], p->red, count);
if (error)
return error;
error = copyout(&sc->sc_cmap.g[index], p->green, count);
if (error)
return error;
error = copyout(&sc->sc_cmap.b[index], p->blue, count);
return error;
}

static int
set_cmap(struct sfbp_softc *sc, struct wsdisplay_cmap *p)
{
struct hwcmap256 cmap;
u_int index = p->index, count = p->count;
int error, s;

if (index >= CMAP_SIZE || count > CMAP_SIZE - index)
return (EINVAL);

error = copyin(p->red, &cmap.r[index], count);
if (error)
return error;
error = copyin(p->green, &cmap.g[index], count);
if (error)
return error;
error = copyin(p->blue, &cmap.b[index], count);
if (error)
return error;

s = spltty();
memcpy(&sc->sc_cmap.r[index], &cmap.r[index], count);
memcpy(&sc->sc_cmap.g[index], &cmap.g[index], count);
memcpy(&sc->sc_cmap.b[index], &cmap.b[index], count);
sc->sc_changed |= WSDISPLAY_CMAP_DOLUT;
splx(s);
return (0);
}

static int
set_cursor(struct sfbp_softc *sc, struct wsdisplay_cursor *p)
{
#define cc (&sc->sc_cursor)
u_int v, index = 0, count = 0, icount = 0;
uint8_t r[2], g[2], b[2], image[512], mask[512];
int error, s;

v = p->which;
if (v & WSDISPLAY_CURSOR_DOCMAP) {
index = p->cmap.index;
count = p->cmap.count;
if (index >= 2 || count > 2 - index)
return (EINVAL);
error = copyin(p->cmap.red, &r[index], count);
if (error)
return error;
error = copyin(p->cmap.green, &g[index], count);
if (error)
return error;
error = copyin(p->cmap.blue, &b[index], count);
if (error)
return error;
}
if (v & WSDISPLAY_CURSOR_DOSHAPE) {
if (p->size.x > CURSOR_MAX_SIZE || p->size.y > CURSOR_MAX_SIZE)
return (EINVAL);
icount = ((p->size.x < 33) ? 4 : 8) * p->size.y;
error = copyin(p->image, image, icount);
if (error)
return error;
error = copyin(p->mask, mask, icount);
if (error)
return error;
}

s = spltty();
if (v & WSDISPLAY_CURSOR_DOCUR)
sc->sc_curenb = p->enable;
if (v & WSDISPLAY_CURSOR_DOPOS)
set_curpos(sc, &p->pos);
if (v & WSDISPLAY_CURSOR_DOHOT)
cc->cc_hot = p->hot;
if (v & WSDISPLAY_CURSOR_DOCMAP) {
memcpy(&cc->cc_color[index], &r[index], count);
memcpy(&cc->cc_color[index + 2], &g[index], count);
memcpy(&cc->cc_color[index + 4], &b[index], count);
}
if (v & WSDISPLAY_CURSOR_DOSHAPE) {
cc->cc_size = p->size;
memset(cc->cc_image, 0, sizeof cc->cc_image);
memcpy(cc->cc_image, image, icount);
memset(cc->cc_mask, 0, sizeof cc->cc_mask);
memcpy(cc->cc_mask, mask, icount);
}
sc->sc_changed |= v;
splx(s);

return (0);
#undef cc
}

static int
get_cursor(struct sfbp_softc *sc, struct wsdisplay_cursor *p)
{
return (EPASSTHROUGH); /* XXX */
}

static void
set_curpos(struct sfbp_softc *sc, struct wsdisplay_curpos *curpos)
{
struct rasops_info *ri = sc->sc_ri;
int x = curpos->x, y = curpos->y;

if (y < 0)
y = 0;
else if (y > ri->ri_height)
y = ri->ri_height;
if (x < 0)
x = 0;
else if (x > ri->ri_width)
x = ri->ri_width;
sc->sc_cursor.cc_pos.x = x;
sc->sc_cursor.cc_pos.y = y;
}

static void
bt459visible(void *hw, int on)
{
hw = (char *)hw + SFB_RAMDAC_OFFSET;
SELECT(hw, BT459_IREG_CCR);
REG(hw, bt_reg) = (on) ? 0xc0 : 0x00;
tc_wmb();
}

static void
sfbpvisible(void *hw, int on)
{
/* XXX use SFBplus ASIC XX */
}

static void
bt459locate(void *hw, struct hwcursor64 *cc)
{
int x, y, s;

x = cc->cc_pos.x - cc->cc_hot.x;
y = cc->cc_pos.y - cc->cc_hot.y;
x += cc->cc_magic.x;
y += cc->cc_magic.y;

hw = (char *)hw + SFB_RAMDAC_OFFSET;

s = spltty();
SELECT(hw, BT459_IREG_CURSOR_X_LOW);
REG(hw, bt_reg) = x; tc_wmb();
REG(hw, bt_reg) = x >> 8; tc_wmb();
REG(hw, bt_reg) = y; tc_wmb();
REG(hw, bt_reg) = y >> 8; tc_wmb();
splx(s);
}

static void
sfbplocate(void *hw, struct hwcursor64 *cc)
{
int x, y;

x = cc->cc_pos.x - cc->cc_hot.x;
y = cc->cc_pos.y - cc->cc_hot.y;

hw = (char *)hw + SFB_ASIC_OFFSET;
*((uint32_t *)hw + TGA_REG_CXYR) = ((y & 0xfff) << 12) | (x & 0xfff);
tc_wmb();
}

static void
bt459color(void *hw, uint8_t *cp)
{

hw = (char *)hw + SFB_RAMDAC_OFFSET;

SELECT(hw, BT459_IREG_CCOLOR_2);
REG(hw, bt_reg) = cp[1]; tc_wmb();
REG(hw, bt_reg) = cp[3]; tc_wmb();
REG(hw, bt_reg) = cp[5]; tc_wmb();

REG(hw, bt_reg) = cp[0]; tc_wmb();
REG(hw, bt_reg) = cp[2]; tc_wmb();
REG(hw, bt_reg) = cp[4]; tc_wmb();
}

static void
bt463color(void *hw, uint8_t *cp)
{
}

static void
bt459shape(void *hw, struct wsdisplay_curpos *size, uint64_t *image)
{
uint8_t *ip, *mp, img, msk;
uint8_t u;
int bcnt;

hw = (char *)hw + SFB_RAMDAC_OFFSET;
ip = (uint8_t *)image;
mp = (uint8_t *)(image + CURSOR_MAX_SIZE);

bcnt = 0;
SELECT(hw, BT459_IREG_CRAM_BASE+0);
/* 64 pixel scan line is consisted with 16 byte cursor ram */
while (bcnt < size->y * 16) {
/* pad right half 32 pixel when smaller than 33 */
if ((bcnt & 0x8) && size->x < 33) {
REG(hw, bt_reg) = 0; tc_wmb();
REG(hw, bt_reg) = 0; tc_wmb();
}
else {
img = *ip++;
msk = *mp++;
img &= msk; /* cookie off image */
u = (msk & 0x0f) << 4 | (img & 0x0f);
REG(hw, bt_reg) = shuffle[u]; tc_wmb();
u = (msk & 0xf0) | (img & 0xf0) >> 4;
REG(hw, bt_reg) = shuffle[u]; tc_wmb();
}
bcnt += 2;
}
/* pad unoccupied scan lines */
while (bcnt < CURSOR_MAX_SIZE * 16) {
REG(hw, bt_reg) = 0; tc_wmb();
REG(hw, bt_reg) = 0; tc_wmb();
bcnt += 2;
}
}

static void
sfbpshape(void *hw, struct wsdisplay_curpos *size, uint64_t *image)
{
/* XXX use SFBplus ASIC XXX */
}

static void
bt459setlut(void *hw, struct hwcmap256 *cm)
{
int index;

hw = (char *)hw + SFB_RAMDAC_OFFSET;
SELECT(hw, 0);
for (index = 0; index < CMAP_SIZE; index++) {
REG(hw, bt_cmap) = cm->r[index]; tc_wmb();
REG(hw, bt_cmap) = cm->g[index]; tc_wmb();
REG(hw, bt_cmap) = cm->b[index]; tc_wmb();
}
}

static void
noplut(void *hw, struct hwcmap256 *cm)
{
}

#define SFBBPP 32

#define MODE_SIMPLE 0
#define MODE_OPAQUESTIPPLE 1
#define MODE_OPAQUELINE 2
#define MODE_TRANSPARENTSTIPPLE 5
#define MODE_TRANSPARENTLINE 6
#define MODE_COPY 7

#if SFBBPP == 8
/* parameters for 8bpp configuration */
#define SFBALIGNMASK 0x7
#define SFBPIXELBYTES 1
#define SFBSTIPPLEALL1 0xffffffff
#define SFBSTIPPLEBITS 32
#define SFBSTIPPLEBITMASK 0x1f
#define SFBSTIPPLEBYTESDONE 32
#define SFBCOPYALL1 0xffffffff
#define SFBCOPYBITS 32
#define SFBCOPYBITMASK 0x1f
#define SFBCOPYBYTESDONE 32

#elif SFBBPP == 32
/* parameters for 32bpp configuration */
#define SFBALIGNMASK 0x7
#define SFBPIXELBYTES 4
#define SFBSTIPPLEALL1 0x0000ffff
#define SFBSTIPPLEBITS 16
#define SFBSTIPPLEBITMASK 0xf
#define SFBSTIPPLEBYTESDONE 32
#define SFBCOPYALL1 0x000000ff
#define SFBCOPYBITS 8
#define SFBCOPYBITMASK 0x3
#define SFBCOPYBYTESDONE 32
#endif

#ifdef pmax
#define WRITE_MB()
#define BUMP(p) (p)
#endif

#ifdef alpha
#define WRITE_MB() tc_wmb()
/* registers is replicated in 1KB stride; rap round 4th iteration */
#define BUMP(p) ((p) = (void *)(((long)(p) + 0x400) & ~0x1000))
#endif

#define SFBMODE(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_MODE) = (v))
#define SFBROP(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_ROP) = (v))
#define SFBPLANEMASK(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_PLANEMASK) = (v))
#define SFBPIXELMASK(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_PIXELMASK) = (v))
#define SFBADDRESS(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_ADDRESS) = (v))
#define SFBSTART(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_START) = (v))
#define SFBPIXELSHIFT(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_PIXELSHIFT) = (v))
#define SFBFG(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_FG) = (v))
#define SFBBG(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_BG) = (v))
#define SFBBCONT(p, v) \
(*(uint32_t *)(BUMP(p) + SFB_ASIC_BCONT) = (v))

#define SFBDATA(p, v) \
(*((uint32_t *)BUMP(p) + TGA_REG_GDAR) = (v))

#define SFBCOPY64BYTESDONE 8
#define SFBCOPY64BITS 64
#define SFBCOPY64SRC(p, v) \
(*((uint32_t *)BUMP(p) + TGA_REG_GCSR) = (long)(v))
#define SFBCOPY64DST(p, v) \
(*((uint32_t *)BUMP(p) + TGA_REG_GCDR) = (long)(v))

/*
* Actually write a string to the frame buffer.
*/
static void
sfbp_putchar(void *id, int row, int col, u_int uc, long attr)
{
struct rasops_info *ri = id;
char *sfb, *p;
int scanspan, height, width, align, x, y;
uint32_t lmask, rmask, glyph;
uint8_t *g;

x = col * ri->ri_font->fontwidth;
y = row * ri->ri_font->fontheight;
scanspan = ri->ri_stride;
height = ri->ri_font->fontheight;
uc -= ri->ri_font->firstchar;
g = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;

p = ri->ri_bits + y * scanspan + x * SFBPIXELBYTES;
align = (long)p & SFBALIGNMASK;
p -= align;
align /= SFBPIXELBYTES;
width = ri->ri_font->fontwidth + align;
lmask = SFBSTIPPLEALL1 << align;
rmask = SFBSTIPPLEALL1 >> (-width & SFBSTIPPLEBITMASK);
sfb = (char *)ri->ri_hw + SFB_ASIC_OFFSET;

SFBMODE(sfb, MODE_OPAQUESTIPPLE);
SFBPLANEMASK(sfb, ~0);
SFBFG(sfb, ri->ri_devcmap[(attr >> 24) & 15]);
SFBBG(sfb, ri->ri_devcmap[(attr >> 16) & 15]);
SFBROP(sfb, (3 << 8) | 3); /* ROP_COPY24 */
*((uint32_t *)sfb + TGA_REG_GPXR_P) = lmask & rmask;

/* XXX 2B stride fonts only XXX */
while (height > 0) {
glyph = *(uint16_t *)g; /* XXX */
*(uint32_t *)p = glyph << align;
p += scanspan;
g += 2; /* XXX */
height--;
}
SFBMODE(sfb, MODE_SIMPLE);
*((uint32_t *)sfb + TGA_REG_GPXR_P) = ~0;
}

#undef SFBSTIPPLEALL1
#undef SFBSTIPPLEBITS
#undef SFBSTIPPLEBITMASK
#define SFBSTIPPLEALL1 SFBCOPYALL1
#define SFBSTIPPLEBITS SFBCOPYBITS
#define SFBSTIPPLEBITMASK SFBCOPYBITMASK

/*
* Clear characters in a line.
*/
static void
sfbp_erasecols(void *id, int row, int startcol, int ncols, long attr)
{
struct rasops_info *ri = id;
char *sfb, *p;
int scanspan, startx, height, width, align, w, y;
uint32_t lmask, rmask;

scanspan = ri->ri_stride;
y = row * ri->ri_font->fontheight;
startx = startcol * ri->ri_font->fontwidth;
height = ri->ri_font->fontheight;
w = ri->ri_font->fontwidth * ncols;

p = ri->ri_bits + y * scanspan + startx * SFBPIXELBYTES;
align = (long)p & SFBALIGNMASK;
align /= SFBPIXELBYTES;
p -= align;
width = w + align;
lmask = SFBSTIPPLEALL1 << align;
rmask = SFBSTIPPLEALL1 >> (-width & SFBSTIPPLEBITMASK);
sfb = (char *)ri->ri_hw + SFB_ASIC_OFFSET;

SFBMODE(sfb, MODE_TRANSPARENTSTIPPLE);
SFBPLANEMASK(sfb, ~0);
SFBFG(sfb, ri->ri_devcmap[(attr >> 16) & 15]); /* fill with bg */
if (width <= SFBSTIPPLEBITS) {
lmask = lmask & rmask;
while (height > 0) {
*(uint32_t *)p = lmask;
p += scanspan;
height--;
}
}
else {
char *q = p;
while (height > 0) {
*(uint32_t *)p = lmask;
WRITE_MB();
width -= 2 * SFBSTIPPLEBITS;
while (width > 0) {
p += SFBSTIPPLEBYTESDONE;
*(uint32_t *)p = SFBSTIPPLEALL1;
WRITE_MB();
width -= SFBSTIPPLEBITS;
}
p += SFBSTIPPLEBYTESDONE;
*(uint32_t *)p = rmask;
WRITE_MB();

p = (q += scanspan);
width = w + align;
height--;
}
}
SFBMODE(sfb, MODE_SIMPLE);
}

#if 1
/*
* Copy lines.
*/
static void
sfbp_copyrows(void *id, int srcrow, int dstrow, int nrows)
{
struct rasops_info *ri = id;
char *sfb, *p;
int scanspan, offset, srcy, height, width, align, w;
uint32_t lmask, rmask;

scanspan = ri->ri_stride;
height = ri->ri_font->fontheight * nrows;
offset = (dstrow - srcrow) * ri->ri_yscale;
srcy = ri->ri_font->fontheight * srcrow;
if (srcrow < dstrow && srcrow + nrows > dstrow) {
scanspan = -scanspan;
srcy += height;
}

p = ri->ri_bits + srcy * ri->ri_stride;
align = (long)p & SFBALIGNMASK;
p -= align;
align /= SFBPIXELBYTES;
w = ri->ri_emuwidth;
width = w + align;
lmask = SFBCOPYALL1 << align;
rmask = SFBCOPYALL1 >> (-width & SFBCOPYBITMASK);
sfb = (char *)ri->ri_hw + SFB_ASIC_OFFSET;

SFBMODE(sfb, MODE_COPY);
SFBPLANEMASK(sfb, ~0);
SFBPIXELSHIFT(sfb, 0);
if (width <= SFBCOPYBITS) {
/* never happens */;
}
else {
char *q = p;
while (height > 0) {
*(uint32_t *)p = lmask;
*(uint32_t *)(p + offset) = lmask;
width -= 2 * SFBCOPYBITS;
while (width > 0) {
p += SFBCOPYBYTESDONE;
*(uint32_t *)p = SFBCOPYALL1;
*(uint32_t *)(p + offset) = SFBCOPYALL1;
width -= SFBCOPYBITS;
}
p += SFBCOPYBYTESDONE;
*(uint32_t *)p = rmask;
*(uint32_t *)(p + offset) = rmask;

p = (q += scanspan);
width = w + align;
height--;
}
}
SFBMODE(sfb, MODE_SIMPLE);
}

#else

static void
sfbp_copyrows(void *id, int srcrow, int dstrow, int nrows)
{
struct rasops_info *ri = id;
void *sfb, *p, *q;
int scanspan, offset, srcy, height, width, w, align;
uint32_t rmask, lmask;

scanspan = ri->ri_stride;
height = ri->ri_font->fontheight * nrows;
offset = (dstrow - srcrow) * ri->ri_yscale;
srcy = ri->ri_font->fontheight * srcrow;
if (srcrow < dstrow && srcrow + nrows > dstrow) {
scanspan = -scanspan;
srcy += height;
}

p = ri->ri_bits + srcy * ri->ri_stride;
align = (long)p & SFBALIGNMASK;
w = ri->ri_emuwidth;
width = w + align;
lmask = SFBCOPYALL1 << align;
rmask = SFBCOPYALL1 >> (-width & SFBCOPYBITMASK);
sfb = (void *)ri->ri_hw + SFB_ASIC_OFFSET;
q = p;

SFBMODE(sfb, MODE_COPY);
SFBPLANEMASK(sfb, ~0);
SFBPIXELSHIFT(sfb, 0);

if (width <= SFBCOPYBITS)
; /* never happens */
else if (width < SFBCOPY64BITS) {
; /* unlikely happens */

}
else {
while (height > 0) {
while (width >= SFBCOPY64BITS) {
SFBCOPY64SRC(sfb, *p);
SFBCOPY64DST(sfb, *p + offset);
p += SFBCOPY64BYTESDONE;
width -= SFBCOPY64BITS;
}
if (width >= SFBCOPYBITS) {
*(uint32_t *)p = SFBCOPYALL1;
*(uint32_t *)(p + offset) = SFBCOPYALL1;
p += SFBCOPYBYTESDONE;
width -= SFBCOPYBITS;
}
if (width > 0) {
*(uint32_t *)p = rmask;
*(uint32_t *)(p + offset) = rmask;
}

p = (q += scanspan);
width = w;
height--;
}
}
SFBMODE(sfb, MODE_SIMPLE);
}
#endif

/*
* Erase lines.
*/
static void
sfbp_eraserows(void *id, int startrow, int nrows, long attr)
{
struct rasops_info *ri = id;
char *sfb, *p;
int scanspan, starty, height, width, align, w;
uint32_t lmask, rmask;

scanspan = ri->ri_stride;
starty = ri->ri_font->fontheight * startrow;
height = ri->ri_font->fontheight * nrows;

p = ri->ri_bits + starty * scanspan;
align = (long)p & SFBALIGNMASK;
p -= align;
align /= SFBPIXELBYTES;
w = ri->ri_emuwidth * SFBPIXELBYTES;
width = w + align;
lmask = SFBSTIPPLEALL1 << align;
rmask = SFBSTIPPLEALL1 >> (-width & SFBSTIPPLEBITMASK);
sfb = (char *)ri->ri_hw + SFB_ASIC_OFFSET;

SFBMODE(sfb, MODE_TRANSPARENTSTIPPLE);
SFBPLANEMASK(sfb, ~0);
SFBFG(sfb, ri->ri_devcmap[(attr >> 16) & 15]);
if (width <= SFBSTIPPLEBITS) {
/* never happens */;
}
else {
char *q = p;
while (height > 0) {
*(uint32_t *)p = lmask;
WRITE_MB();
width -= 2 * SFBSTIPPLEBITS;
while (width > 0) {
p += SFBSTIPPLEBYTESDONE;
*(uint32_t *)p = SFBSTIPPLEALL1;
WRITE_MB();
width -= SFBSTIPPLEBITS;
}
p += SFBSTIPPLEBYTESDONE;
*(uint32_t *)p = rmask;
WRITE_MB();

p = (q += scanspan);
width = w + align;
height--;
}
}
SFBMODE(sfb, MODE_SIMPLE);
}