* Copyright (c) 2014 Michael Lorenz

/* $NetBSD: mgx.c,v 1.24 2023/07/19 10:22:15 macallan Exp $ */

/*-
* Copyright (c) 2014 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.
*/

/* a console driver for the SSB 4096V-MGX graphics card */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mgx.c,v 1.24 2023/07/19 10:22:15 macallan Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/kmem.h>
#include <sys/kauth.h>
#include <sys/atomic.h>

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

#include <dev/sbus/sbusvar.h>
#include <dev/sun/fbio.h>
#include <dev/sun/fbvar.h>

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

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

#include <dev/ic/vgareg.h>
#include <dev/sbus/mgxreg.h>

#include "ioconf.h"

#include "opt_wsemul.h"
#include "opt_mgx.h"

struct mgx_softc {
device_t sc_dev;
struct fbdevice sc_fb; /* frame buffer device */
bus_space_tag_t sc_tag;
bus_space_handle_t sc_blith;
bus_space_handle_t sc_vgah;
bus_addr_t sc_paddr, sc_rpaddr;
void *sc_fbaddr;
uint8_t *sc_cursor;
int sc_width;
int sc_height;
int sc_stride;
int sc_depth;
int sc_fbsize;
int sc_mode;
char sc_name[8];
uint32_t sc_dec, sc_r_dec, sc_r_fg;
u_char sc_cmap_red[256];
u_char sc_cmap_green[256];
u_char sc_cmap_blue[256];
int sc_cursor_x, sc_cursor_y;
int sc_hotspot_x, sc_hotspot_y;
int sc_video, sc_buf;
void (*sc_putchar)(void *, int, int, u_int, long);
struct vcons_screen sc_console_screen;
struct wsscreen_descr sc_defaultscreen_descr;
const struct wsscreen_descr *sc_screens[1];
struct wsscreen_list sc_screenlist;
struct vcons_data vd;
glyphcache sc_gc;
uint8_t sc_in[256];
};

static int mgx_match(device_t, cfdata_t, void *);
static void mgx_attach(device_t, device_t, void *);
static int mgx_ioctl(void *, void *, u_long, void *, int,
struct lwp*);
static paddr_t mgx_mmap(void *, void *, off_t, int);
static void mgx_init_screen(void *, struct vcons_screen *, int,
long *);
static void mgx_write_dac(struct mgx_softc *, int, int, int, int);
static void mgx_setup(struct mgx_softc *, int);
static void mgx_init_palette(struct mgx_softc *);
static int mgx_putcmap(struct mgx_softc *, struct wsdisplay_cmap *);
static int mgx_getcmap(struct mgx_softc *, struct wsdisplay_cmap *);
static int mgx_wait_engine(struct mgx_softc *);
__unused static int mgx_wait_host(struct mgx_softc *);
/*static*/ int mgx_wait_fifo(struct mgx_softc *, unsigned int);

static void mgx_bitblt(void *, int, int, int, int, int, int, int);
static void mgx_rectfill(void *, int, int, int, int, long);

static void mgx_putchar_aa(void *, int, int, u_int, long);
static void mgx_putchar_mono(void *, int, int, u_int, long);
static void mgx_cursor(void *, int, int, int);
static void mgx_copycols(void *, int, int, int, int);
static void mgx_erasecols(void *, int, int, int, long);
static void mgx_copyrows(void *, int, int, int);
static void mgx_eraserows(void *, int, int, long);
static void mgx_adapt(struct vcons_screen *, void *);

static int mgx_do_cursor(struct mgx_softc *, struct wsdisplay_cursor *);
static void mgx_set_cursor(struct mgx_softc *);
static void mgx_set_video(struct mgx_softc *, int);

CFATTACH_DECL_NEW(mgx, sizeof(struct mgx_softc),
mgx_match, mgx_attach, NULL, NULL);

struct wsdisplay_accessops mgx_accessops = {
mgx_ioctl,
mgx_mmap,
NULL, /* vcons_alloc_screen */
NULL, /* vcons_free_screen */
NULL, /* vcons_show_screen */
NULL, /* load_font */
NULL, /* polls */
NULL, /* scroll */
};

static void mgx_unblank(device_t);

dev_type_open(mgxopen);
dev_type_close(mgxclose);
dev_type_ioctl(mgxioctl);
dev_type_mmap(mgxmmap);

const struct cdevsw mgx_cdevsw = {
.d_open = mgxopen,
.d_close = mgxclose,
.d_read = noread,
.d_write = nowrite,
.d_ioctl = mgxioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = nopoll,
.d_mmap = mgxmmap,
.d_kqfilter = nokqfilter,
.d_discard = nodiscard,
.d_flag = D_OTHER
};

/* frame buffer generic driver */
static struct fbdriver mgx_fbdriver = {
mgx_unblank, mgxopen, mgxclose, mgxioctl, nopoll, mgxmmap,
nokqfilter
};

static inline void
mgx_write_vga(struct mgx_softc *sc, uint32_t reg, uint8_t val)
{
bus_space_write_1(sc->sc_tag, sc->sc_vgah, reg ^ 3, val);
}

static inline uint8_t
mgx_read_vga(struct mgx_softc *sc, uint32_t reg)
{
return bus_space_read_1(sc->sc_tag, sc->sc_vgah, reg ^ 3);
}

static inline void
mgx_write_1(struct mgx_softc *sc, uint32_t reg, uint8_t val)
{
bus_space_write_1(sc->sc_tag, sc->sc_blith, reg ^ 3, val);
}

static inline uint8_t
mgx_read_1(struct mgx_softc *sc, uint32_t reg)
{
return bus_space_read_1(sc->sc_tag, sc->sc_blith, reg ^ 3);
}

#if 0
static inline uint32_t
mgx_read_4(struct mgx_softc *sc, uint32_t reg)
{
return bus_space_read_4(sc->sc_tag, sc->sc_blith, reg);
}
#endif

static inline void
mgx_write_2(struct mgx_softc *sc, uint32_t reg, uint16_t val)
{
bus_space_write_2(sc->sc_tag, sc->sc_blith, reg ^ 2, val);
}

static inline void
mgx_write_4(struct mgx_softc *sc, uint32_t reg, uint32_t val)
{
bus_space_write_4(sc->sc_tag, sc->sc_blith, reg, val);
}

static inline void
mgx_set_dec(struct mgx_softc *sc, uint32_t dec)
{
if (dec == sc->sc_r_dec) return;
sc->sc_r_dec = dec;
mgx_wait_engine(sc);
mgx_write_4(sc, ATR_DEC, dec);
}

static inline void
mgx_set_fg(struct mgx_softc *sc, uint32_t fg)
{
if (fg == sc->sc_r_fg) return;
sc->sc_r_fg = fg;
mgx_wait_fifo(sc, 1);
mgx_write_4(sc, ATR_FG, fg);
}

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

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

/*
* Attach a display. We need to notice if it is the console, too.
*/
static void
mgx_attach(device_t parent, device_t self, void *args)
{
struct mgx_softc *sc = device_private(self);
struct sbus_attach_args *sa = args;
struct wsemuldisplaydev_attach_args aa;
struct fbdevice *fb = &sc->sc_fb;
struct rasops_info *ri;
unsigned long defattr;
bus_space_handle_t bh;
int node = sa->sa_node, bsize;
int isconsole;

aprint_normal("\n");
sc->sc_dev = self;
sc->sc_tag = sa->sa_bustag;

sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot,
sa->sa_reg[8].oa_base);
sc->sc_rpaddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot,
sa->sa_reg[5].oa_base + MGX_REG_ATREG_OFFSET);

/* read geometry information from the device tree */
sc->sc_width = prom_getpropint(sa->sa_node, "width", 1152);
sc->sc_height = prom_getpropint(sa->sa_node, "height", 900);
sc->sc_stride = prom_getpropint(sa->sa_node, "linebytes", 1152);
sc->sc_fbsize = prom_getpropint(sa->sa_node, "fb_size", 0x00400000);
sc->sc_fbaddr = NULL;
if (sc->sc_fbaddr == NULL) {
if (sbus_bus_map(sa->sa_bustag,
sa->sa_slot,
sa->sa_reg[8].oa_base,
sc->sc_fbsize,
BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_LARGE,
&bh) != 0) {
aprint_error_dev(self, "couldn't map framebuffer\n");
return;
}
sc->sc_fbaddr = bus_space_vaddr(sa->sa_bustag, bh);
}

if (sbus_bus_map(sa->sa_bustag,
sa->sa_slot,
sa->sa_reg[4].oa_base, 0x1000, 0,
&sc->sc_vgah) != 0) {
aprint_error("%s: couldn't map VGA registers\n",
device_xname(sc->sc_dev));
return;
}

if (sbus_bus_map(sa->sa_bustag,
sa->sa_slot,
sa->sa_reg[5].oa_base + MGX_REG_ATREG_OFFSET, 0x1000,
0, &sc->sc_blith) != 0) {
aprint_error("%s: couldn't map blitter registers\n",
device_xname(sc->sc_dev));
return;
}

mgx_setup(sc, MGX_DEPTH);

aprint_normal_dev(self, "[%s] %d MB framebuffer, %d x %d\n",
sc->sc_name, sc->sc_fbsize >> 20, sc->sc_width, sc->sc_height);

sc->sc_defaultscreen_descr = (struct wsscreen_descr) {
"default",
0, 0,
NULL,
8, 16,
WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_UNDERLINE |
WSSCREEN_RESIZE,
NULL
};

sc->sc_cursor_x = 0;
sc->sc_cursor_y = 0;
sc->sc_hotspot_x = 0;
sc->sc_hotspot_y = 0;
sc->sc_video = WSDISPLAYIO_VIDEO_ON;

sc->sc_screens[0] = &sc->sc_defaultscreen_descr;
sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens};

isconsole = fb_is_console(node);

sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
wsfont_init();

vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr, &mgx_accessops);
sc->vd.init_screen = mgx_init_screen;
sc->vd.show_screen_cookie = sc;
sc->vd.show_screen_cb = mgx_adapt;

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

ri = &sc->sc_console_screen.scr_ri;

sc->sc_defaultscreen_descr.nrows = ri->ri_rows;
sc->sc_defaultscreen_descr.ncols = ri->ri_cols;
sc->sc_defaultscreen_descr.textops = &ri->ri_ops;
sc->sc_defaultscreen_descr.capabilities = ri->ri_caps;

sc->sc_gc.gc_bitblt = mgx_bitblt;
sc->sc_gc.gc_rectfill = mgx_rectfill;
sc->sc_gc.gc_blitcookie = sc;
sc->sc_gc.gc_rop = ROP_SRC;

/*
* leave some room between visible screen and glyph cache for upload
* buffers used by putchar_mono()
*/
bsize = (32 * 1024 + sc->sc_stride - 1) / sc->sc_stride;
glyphcache_init(&sc->sc_gc,
sc->sc_height + bsize,
(0x400000 / sc->sc_stride) - (sc->sc_height + bsize),
sc->sc_width,
ri->ri_font->fontwidth,
ri->ri_font->fontheight,
defattr);

mgx_init_palette(sc);

if(isconsole) {
wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, 0,
defattr);
vcons_replay_msgbuf(&sc->sc_console_screen);
}

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

config_found(self, &aa, wsemuldisplaydevprint, CFARGS_NONE);

/* now the Sun fb goop */
fb->fb_driver = &mgx_fbdriver;
fb->fb_device = sc->sc_dev;
fb->fb_flags = device_cfdata(sc->sc_dev)->cf_flags & FB_USERMASK;
fb->fb_type.fb_type = FBTYPE_MGX;
fb->fb_pixels = NULL;

fb->fb_type.fb_depth = 32;
fb->fb_type.fb_width = sc->sc_width;
fb->fb_type.fb_height = sc->sc_height;
fb->fb_linebytes = sc->sc_stride * 4;

fb->fb_type.fb_cmsize = 256;
fb->fb_type.fb_size = sc->sc_fbsize;
fb_attach(&sc->sc_fb, isconsole);
}

static void
mgx_write_dac(struct mgx_softc *sc, int idx, int r, int g, int b)
{
mgx_write_vga(sc, VGA_BASE + VGA_DAC_ADDRW, idx);
mgx_write_vga(sc, VGA_BASE + VGA_DAC_PALETTE, r);
mgx_write_vga(sc, VGA_BASE + VGA_DAC_PALETTE, g);
mgx_write_vga(sc, VGA_BASE + VGA_DAC_PALETTE, b);
}

static void
mgx_init_palette(struct mgx_softc *sc)
{
struct rasops_info *ri = &sc->sc_console_screen.scr_ri;
int i, j = 0;
uint8_t cmap[768];

if (sc->sc_depth == 8) {
rasops_get_cmap(ri, cmap, sizeof(cmap));
for (i = 0; i < 256; i++) {
sc->sc_cmap_red[i] = cmap[j];
sc->sc_cmap_green[i] = cmap[j + 1];
sc->sc_cmap_blue[i] = cmap[j + 2];
mgx_write_dac(sc, i, cmap[j], cmap[j + 1], cmap[j + 2]);
j += 3;
}
} else {
/* linear ramp for true colour modes */
for (i = 0; i < 256; i++) {
mgx_write_dac(sc, i, i, i, i);
}
}
}

static int
mgx_putcmap(struct mgx_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];

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++) {
mgx_write_dac(sc, index, *r, *g, *b);
index++;
r++, g++, b++;
}
return 0;
}

static int
mgx_getcmap(struct mgx_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 int
mgx_wait_engine(struct mgx_softc *sc)
{
unsigned int i;
uint8_t stat;

for (i = 100000; i != 0; i--) {
stat = mgx_read_1(sc, ATR_BLT_STATUS);
if ((stat & (BLT_HOST_BUSY | BLT_ENGINE_BUSY)) == 0)
break;
}

return i;
}

static inline int
mgx_wait_host(struct mgx_softc *sc)
{
unsigned int i;
uint8_t stat;

for (i = 10000; i != 0; i--) {
stat = mgx_read_1(sc, ATR_BLT_STATUS);
if ((stat & BLT_HOST_BUSY) == 0)
break;
}

return i;
}

/*static inline*/ int
mgx_wait_fifo(struct mgx_softc *sc, unsigned int nfifo)
{
unsigned int i;
uint8_t stat;

for (i = 100000; i != 0; i--) {
stat = mgx_read_1(sc, ATR_FIFO_STATUS);
stat = (stat & FIFO_MASK) >> FIFO_SHIFT;
if (stat >= nfifo)
break;
mgx_write_1(sc, ATR_FIFO_STATUS, 0);
}

return i;
}

static void
mgx_setup(struct mgx_softc *sc, int depth)
{
uint32_t stride;
int i;
uint8_t reg;

sc->sc_r_dec = 0xffffffff;
sc->sc_r_fg = 0x12345678;
/* wait for everything to go idle */
if (mgx_wait_engine(sc) == 0)
return;
if (mgx_wait_fifo(sc, FIFO_AT24) == 0)
return;

sc->sc_buf = 0;
/* read name from sequencer */
for (i = 0; i < 8; i++) {
mgx_write_vga(sc, SEQ_INDEX, i + 0x11);
sc->sc_name[i] = mgx_read_vga(sc, SEQ_DATA);
}
sc->sc_name[7] = 0;

reg = mgx_read_1(sc, ATR_PIXEL);
reg &= ~PIXEL_DEPTH_MASK;

switch (depth) {
case 8:
sc->sc_dec = DEC_DEPTH_8 << DEC_DEPTH_SHIFT;
reg |= PIXEL_8;
break;
case 15:
sc->sc_dec = DEC_DEPTH_16 << DEC_DEPTH_SHIFT;
reg |= PIXEL_15;
break;
case 16:
sc->sc_dec = DEC_DEPTH_16 << DEC_DEPTH_SHIFT;
reg |= PIXEL_16;
break;
case 32:
sc->sc_dec = DEC_DEPTH_32 << DEC_DEPTH_SHIFT;
reg |= PIXEL_32;
break;
default:
return; /* not supported */
}

/* the chip wants stride in units of 8 bytes */
sc->sc_stride = sc->sc_width * (depth >> 3);
stride = sc->sc_stride >> 3;
#ifdef MGX_DEBUG
sc->sc_height -= 150;
#endif

sc->sc_depth = depth;

switch (sc->sc_width) {
case 640:
sc->sc_dec |= DEC_WIDTH_640 << DEC_WIDTH_SHIFT;
break;
case 800:
sc->sc_dec |= DEC_WIDTH_800 << DEC_WIDTH_SHIFT;
break;
case 1024:
sc->sc_dec |= DEC_WIDTH_1024 << DEC_WIDTH_SHIFT;
break;
case 1152:
sc->sc_dec |= DEC_WIDTH_1152 << DEC_WIDTH_SHIFT;
break;
case 1280:
sc->sc_dec |= DEC_WIDTH_1280 << DEC_WIDTH_SHIFT;
break;
case 1600:
sc->sc_dec |= DEC_WIDTH_1600 << DEC_WIDTH_SHIFT;
break;
default:
return; /* not supported */
}
mgx_wait_fifo(sc, 4);
mgx_write_1(sc, ATR_CLIP_CONTROL, 0);
mgx_write_1(sc, ATR_BYTEMASK, 0xff);
mgx_write_1(sc, ATR_PIXEL, reg);
mgx_write_4(sc, ATR_OFFSET, 0);
mgx_wait_fifo(sc, 4);
mgx_write_vga(sc, CRTC_INDEX, 0x13);
mgx_write_vga(sc, CRTC_DATA, stride & 0xff);
mgx_write_vga(sc, CRTC_INDEX, 0x1c);
mgx_write_vga(sc, CRTC_DATA, (stride & 0xf00) >> 4);

/* clean up the screen if we're switching to != 8bit */
if (depth != MGX_DEPTH)
mgx_rectfill(sc, 0, 0, sc->sc_width, sc->sc_height, 0);

mgx_wait_fifo(sc, 4);
/* initialize hardware cursor stuff */
mgx_write_2(sc, ATR_CURSOR_ADDRESS, (sc->sc_fbsize - 1024) >> 10);
mgx_write_1(sc, ATR_CURSOR_ENABLE, 0);
sc->sc_cursor = (uint8_t *)sc->sc_fbaddr + sc->sc_fbsize - 1024;
memset(sc->sc_cursor, 0xf0, 1024);
memset(sc->sc_in, 0, sizeof(sc->sc_in));
}

static void
mgx_bitblt(void *cookie, int xs, int ys, int xd, int yd, int wi, int he,
int rop)
{
struct mgx_softc *sc = cookie;
uint32_t dec = sc->sc_dec;

dec |= (DEC_COMMAND_BLT << DEC_COMMAND_SHIFT) |
(DEC_START_DIMX << DEC_START_SHIFT);
if (xs < xd) {
xs += wi - 1;
xd += wi - 1;
dec |= DEC_DIR_X_REVERSE;
}
if (ys < yd) {
ys += he - 1;
yd += he - 1;
dec |= DEC_DIR_Y_REVERSE;
}
mgx_set_dec(sc, dec);
mgx_wait_fifo(sc, 4);
mgx_write_1(sc, ATR_ROP, rop);
mgx_write_4(sc, ATR_SRC_XY, (ys << 16) | xs);
mgx_write_4(sc, ATR_DST_XY, (yd << 16) | xd);
mgx_write_4(sc, ATR_WH, (he << 16) | wi);
}

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

if (scr == NULL)
return;
col = scr->scr_ri.ri_devcmap[fg];

dec = sc->sc_dec;
dec |= (DEC_COMMAND_RECT << DEC_COMMAND_SHIFT) |
(DEC_START_DIMX << DEC_START_SHIFT);
mgx_set_dec(sc, dec);
mgx_set_fg(sc, col);
mgx_wait_fifo(sc, 3);
mgx_write_1(sc, ATR_ROP, ROP_SRC);
mgx_write_4(sc, ATR_DST_XY, (y << 16) | x);
mgx_write_4(sc, ATR_WH, (he << 16) | wi);
}

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

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

bg = (attr >> 16) & 0xf;
fg = (attr >> 24) & 0xf;

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

if (c == 0x20) {
mgx_rectfill(sc, x, y, wi, he, bg);
if (attr & 1)
mgx_rectfill(sc, x, y + he - 2, wi, 1, fg);
return;
}

rv = glyphcache_try(&sc->sc_gc, c, x, y, attr);
if (rv != GC_OK) {
volatile uint32_t junk;

mgx_wait_engine(sc);
sc->sc_putchar(cookie, row, col, c, attr & ~1);
if (rv == GC_ADD) {
/*
* try to make sure the glyph made it all the way to
* video memory before trying to blit it into the cache
*/
junk = *(uint32_t *)sc->sc_fbaddr;
__USE(junk);
glyphcache_add(&sc->sc_gc, c, x, y);
}
}
if (attr & 1)
mgx_rectfill(sc, x, y + he - 2, wi, 1, fg);
}

static void
mgx_putchar_mono(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 mgx_softc *sc = scr->scr_cookie;
uint8_t *s, *d;
uint32_t fg, bg, scratch = ((sc->sc_stride * sc->sc_height) + 7) & ~7;
int x, y, wi, he, len, i;

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

bg = (attr >> 16) & 0xf;
fg = (attr >> 24) & 0xf;

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

if (!CHAR_IN_FONT(c, font)) {
c = 0x20;
#ifdef MGX_DEBUG
bg = WSCOL_LIGHT_BLUE;
#endif
}
if (c == 0x20) {
mgx_rectfill(sc, x, y, wi, he, bg);
if (attr & 1)
mgx_rectfill(sc, x, y + he - 2, wi, 1, fg);
return;
}

mgx_set_fg(sc, ri->ri_devcmap[fg]);
mgx_wait_fifo(sc, 2);
mgx_write_4(sc, ATR_BG, ri->ri_devcmap[bg]);
mgx_write_1(sc, ATR_ROP, ROP_SRC);

/*
* do hardware colour expansion
* there has to be an upload port somewhere, since there are host blit
* commands, but it's not used or mentioned in the xf86-video-apm driver
* so for now we use the vram-to-vram blits to draw characters.
* stash most of the font in vram for speed, also:
* - the sbus-pci bridge doesn't seem to support 64bit accesses,
* they will cause occasional data corruption and all sorts of weird
* side effects, so copy font bitmaps byte-wise
* - at least it doesn't seem to need any kind of buffer flushing
* - still use rotation buffers for characters that don't fall into the
* 8 bit range
*/

len = (ri->ri_fontscale + 7) & ~7;
s = WSFONT_GLYPH(c, font);
if ((c > 32) && (c < 256)) {
scratch += len * c;
if (sc->sc_in[c] == 0) {
d = (uint8_t *)sc->sc_fbaddr + scratch;
for (i = 0; i < ri->ri_fontscale; i++)
d[i] = s[i];
sc->sc_in[c] = 1;
}
} else {
sc->sc_buf = (sc->sc_buf + 1) & 7; /* rotate through 8 buffers */
scratch += sc->sc_buf * len;
d = (uint8_t *)sc->sc_fbaddr + scratch;
for (i = 0; i < ri->ri_fontscale; i++)
d[i] = s[i];
}
mgx_set_dec(sc, sc->sc_dec | (DEC_COMMAND_BLT << DEC_COMMAND_SHIFT) |
(DEC_START_DIMX << DEC_START_SHIFT) |
DEC_SRC_LINEAR | DEC_SRC_CONTIGUOUS | DEC_MONOCHROME);
mgx_wait_fifo(sc, 3);
mgx_write_4(sc, ATR_SRC_XY, ((scratch & 0xfff000) << 4) | (scratch & 0xfff));
mgx_write_4(sc, ATR_DST_XY, (y << 16) | x);
mgx_write_4(sc, ATR_WH, (he << 16) | wi);

if (attr & 1)
mgx_rectfill(sc, x, y + he - 2, wi, 1, fg);
}

static void
mgx_cursor(void *cookie, int on, int row, int col)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct mgx_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;
mgx_bitblt(sc, x, y, x, y, wi, he, ROP_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;
mgx_bitblt(sc, x, y, x, y, wi, he, ROP_INV);
ri->ri_flg |= RI_CURSOR;
}
}

static void
mgx_copycols(void *cookie, int row, int srccol, int dstcol, int ncols)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct mgx_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;
mgx_bitblt(sc, xs, y, xd, y, width, height, ROP_SRC);
}

static void
mgx_erasecols(void *cookie, int row, int startcol, int ncols, long fillattr)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct mgx_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 = (fillattr >> 16) & 0xff;
mgx_rectfill(sc, x, y, width, height, bg);
}

static void
mgx_copyrows(void *cookie, int srcrow, int dstrow, int nrows)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct mgx_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;
mgx_bitblt(sc, x, ys, x, yd, width, height, ROP_SRC);
}

static void
mgx_eraserows(void *cookie, int row, int nrows, long fillattr)
{
struct rasops_info *ri = cookie;
struct vcons_screen *scr = ri->ri_hw;
struct mgx_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 = (fillattr >> 16) & 0xff;
mgx_rectfill(sc, x, y, width, height, bg);
}

static void
mgx_adapt(struct vcons_screen *scr, void *cookie)
{
struct mgx_softc *sc = cookie;
memset(sc->sc_in, 0, sizeof(sc->sc_in));
glyphcache_adapt(scr, &sc->sc_gc);
}

static void
mgx_init_screen(void *cookie, struct vcons_screen *scr,
int existing, long *defattr)
{
struct mgx_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_ENABLE_ALPHA;

if (ri->ri_depth == 8)
ri->ri_flg |= RI_8BIT_IS_RGB;

#ifdef MGX_NOACCEL
scr->scr_flags |= VCONS_DONT_READ;
#endif
scr->scr_flags |= VCONS_LOADFONT;

ri->ri_rnum = 8;
ri->ri_rpos = 0;
ri->ri_gnum = 8;
ri->ri_gpos = 8;
ri->ri_bnum = 8;
ri->ri_bpos = 16;

ri->ri_bits = sc->sc_fbaddr;

rasops_init(ri, 0, 0);

ri->ri_caps = WSSCREEN_REVERSE | WSSCREEN_WSCOLORS |
WSSCREEN_UNDERLINE | WSSCREEN_RESIZE;

rasops_reconfig(ri, ri->ri_height / ri->ri_font->fontheight,
ri->ri_width / ri->ri_font->fontwidth);

ri->ri_hw = scr;

#ifdef MGX_NOACCEL
if (0)
#endif
{
if (FONT_IS_ALPHA(ri->ri_font)) {
sc->sc_putchar = ri->ri_ops.putchar;
ri->ri_ops.putchar = mgx_putchar_aa;
} else {
ri->ri_ops.putchar = mgx_putchar_mono;
}
ri->ri_ops.cursor = mgx_cursor;
ri->ri_ops.copyrows = mgx_copyrows;
ri->ri_ops.eraserows = mgx_eraserows;
ri->ri_ops.copycols = mgx_copycols;
ri->ri_ops.erasecols = mgx_erasecols;
}
}

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

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

case WSDISPLAYIO_GINFO:
wdf = (void *)data;
wdf->height = sc->sc_height;
wdf->width = sc->sc_width;
wdf->depth = 8;
wdf->cmsize = 256;
return 0;

case FBIOGTYPE:
*(struct fbtype *)data = sc->sc_fb.fb_type;
return 0;

case FBIOGATTR:
#define 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;
#undef fba
return 0;
case FBIOGVIDEO:
case WSDISPLAYIO_GVIDEO:
*(int *)data = sc->sc_video;
return 0;

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

case WSDISPLAYIO_LINEBYTES:
{
int *ret = (int *)data;
*ret = sc->sc_stride;
}
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)
{
mgx_setup(sc, MGX_DEPTH);
glyphcache_wipe(&sc->sc_gc);
mgx_init_palette(sc);
vcons_redraw_screen(ms);
} else {
mgx_setup(sc, MGX_X_DEPTH);
mgx_init_palette(sc);
}
}
}
return 0;

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

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

case FBIOGETCMAP:
#define p ((struct fbcmap *)data)
{
struct wsdisplay_cmap c = {
.index = p->index,
.count = p->count,
.red = p->red,
.green = p->green,
.blue = p->blue
};
return mgx_getcmap(sc, &c);
}
break;
case FBIOPUTCMAP:
{
struct wsdisplay_cmap c = {
.index = p->index,
.count = p->count,
.red = p->red,
.green = p->green,
.blue = p->blue
};
return mgx_putcmap(sc, &c);
}
break;
#undef p
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;

sc->sc_cursor_x = cp->x;
sc->sc_cursor_y = cp->y;
mgx_set_cursor(sc);
}
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 mgx_do_cursor(sc, cursor);
}

case WSDISPLAYIO_GET_FBINFO:
{
struct wsdisplayio_fbinfo *fbi = data;

fbi->fbi_fbsize = sc->sc_fbsize - 1024;
fbi->fbi_width = sc->sc_width;
fbi->fbi_height = sc->sc_height;
fbi->fbi_bitsperpixel = sc->sc_depth;
fbi->fbi_stride = sc->sc_stride;
fbi->fbi_pixeltype = WSFB_RGB;
fbi->fbi_subtype.fbi_rgbmasks.red_offset = 8;
fbi->fbi_subtype.fbi_rgbmasks.red_size = 8;
fbi->fbi_subtype.fbi_rgbmasks.green_offset = 16;
fbi->fbi_subtype.fbi_rgbmasks.green_size = 8;
fbi->fbi_subtype.fbi_rgbmasks.blue_offset = 24;
fbi->fbi_subtype.fbi_rgbmasks.blue_size = 8;
fbi->fbi_subtype.fbi_rgbmasks.alpha_offset = 0;
fbi->fbi_subtype.fbi_rgbmasks.alpha_size = 8;
return 0;
}
}
return EPASSTHROUGH;
}

static paddr_t
mgx_mmap(void *v, void *vs, off_t offset, int prot)
{
struct vcons_data *vd = v;
struct mgx_softc *sc = vd->cookie;
uint32_t flags = BUS_SPACE_MAP_LINEAR;

#ifdef BUS_SPACE_MAP_LITTLE
if (offset & MGX_FLIPOFFSET) {
offset &= ~MGX_FLIPOFFSET;
flags |= BUS_SPACE_MAP_LITTLE;
}
#endif

/* regular fb mapping at 0 */
if ((offset >= 0) && (offset < sc->sc_fbsize)) {
return bus_space_mmap(sc->sc_tag, sc->sc_paddr,
offset, prot, flags);
}

/*
* Blitter registers at 0x00800000, only in mapped mode.
* Restrict to root, even though I'm fairly sure the DMA engine lives
* elsewhere ( and isn't documented anyway )
*/
if (kauth_authorize_machdep(kauth_cred_get(),
KAUTH_MACHDEP_UNMANAGEDMEM,
NULL, NULL, NULL, NULL) != 0) {
aprint_normal("%s: mmap() rejected.\n",
device_xname(sc->sc_dev));
return -1;
}
if ((sc->sc_mode == WSDISPLAYIO_MODE_MAPPED) &&
(offset >= MGX_BLTOFFSET) && (offset < MGX_BLTOFFSET + 0x1000)) {
return bus_space_mmap(sc->sc_tag, sc->sc_rpaddr,
offset - MGX_BLTOFFSET, prot, BUS_SPACE_MAP_LINEAR);
}
return -1;
}

static int
mgx_do_cursor(struct mgx_softc *sc, struct wsdisplay_cursor *cur)
{
int i;
if (cur->which & WSDISPLAY_CURSOR_DOCUR) {

if (cur->enable) {
mgx_set_cursor(sc);
mgx_write_1(sc, ATR_CURSOR_ENABLE, 1);
} else {
mgx_write_1(sc, ATR_CURSOR_ENABLE, 0);
}
}
if (cur->which & WSDISPLAY_CURSOR_DOHOT) {

sc->sc_hotspot_x = cur->hot.x;
sc->sc_hotspot_y = cur->hot.y;
mgx_set_cursor(sc);
}
if (cur->which & WSDISPLAY_CURSOR_DOPOS) {

sc->sc_cursor_x = cur->pos.x;
sc->sc_cursor_y = cur->pos.y;
mgx_set_cursor(sc);
}
if (cur->which & WSDISPLAY_CURSOR_DOCMAP) {
int cnt = uimin(2, cur->cmap.count);
uint8_t c;
uint8_t r[2], g[2], b[2];

copyin(cur->cmap.red, r, cnt);
copyin(cur->cmap.green, g, cnt);
copyin(cur->cmap.blue, b, cnt);

for (i = 0; i < cnt; i++) {
c = r[i] & 0xe0;
c |= (g[i] & 0xe0) >> 3;
c |= (b[i] & 0xc0) >> 6;
mgx_write_1(sc, ATR_CURSOR_FG + i, c);
}
}
if (cur->which & WSDISPLAY_CURSOR_DOSHAPE) {
int j;
uint8_t *fb = sc->sc_cursor;
uint8_t temp;
uint8_t im, ma, px;

for (i = 0; i < 512; i++) {
temp = 0;
copyin(&cur->image[i], &im, 1);
copyin(&cur->mask[i], &ma, 1);
for (j = 0; j < 4; j++) {
temp >>= 2;
px = (ma & 1) ? 0 : 0x80;
if (px == 0)
px |= (im & 1) ? 0 : 0x40;
temp |= px;
im >>= 1;
ma >>= 1;
}
*fb = temp;
fb++;
temp = 0;
for (j = 0; j < 4; j++) {
temp >>= 2;
px = (ma & 1) ? 0 : 0x80;
if (px == 0)
px |= (im & 1) ? 0 : 0x40;
temp |= px;
im >>= 1;
ma >>= 1;
}
*fb = temp;
fb++;
}
}
return 0;
}

static void
mgx_set_cursor(struct mgx_softc *sc)
{
uint32_t reg;
uint16_t hot;

reg = (sc->sc_cursor_y << 16) | (sc->sc_cursor_x & 0xffff);
mgx_write_4(sc, ATR_CURSOR_POSITION, reg);
hot = (sc->sc_hotspot_y << 8) | (sc->sc_hotspot_x & 0xff);
mgx_write_2(sc, ATR_CURSOR_HOTSPOT, hot);
}

static void
mgx_set_video(struct mgx_softc *sc, int v)
{
uint8_t reg;

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

sc->sc_video = v;
reg = mgx_read_1(sc, ATR_DPMS);

if (v == WSDISPLAYIO_VIDEO_ON) {
reg &= ~DPMS_SYNC_DISABLE_ALL;
} else {
reg |= DPMS_SYNC_DISABLE_ALL;
}
mgx_write_1(sc, ATR_DPMS, reg);
}

/* Sun fb dev goop */
static void
mgx_unblank(device_t dev)
{
struct mgx_softc *sc = device_private(dev);

mgx_set_video(sc, WSDISPLAYIO_VIDEO_ON);
}

paddr_t
mgxmmap(dev_t dev, off_t offset, int prot)
{
struct mgx_softc *sc = device_lookup_private(&mgx_cd, minor(dev));
uint32_t flags = BUS_SPACE_MAP_LINEAR;

#ifdef BUS_SPACE_MAP_LITTLE
if (offset & MGX_FLIPOFFSET) {
offset &= ~MGX_FLIPOFFSET;
flags |= BUS_SPACE_MAP_LITTLE;
}
#endif

/* regular fb mapping at 0 */
if ((offset >= 0) && (offset < sc->sc_fbsize)) {
return bus_space_mmap(sc->sc_tag, sc->sc_paddr,
offset, prot, flags);
}

/*
* Blitter registers at 0x00800000, only in mapped mode.
* Restrict to root, even though I'm fairly sure the DMA engine lives
* elsewhere ( and isn't documented anyway )
*/
if (kauth_authorize_machdep(kauth_cred_get(),
KAUTH_MACHDEP_UNMANAGEDMEM,
NULL, NULL, NULL, NULL) != 0) {
aprint_normal("%s: mmap() rejected.\n",
device_xname(sc->sc_dev));
return -1;
}
if ((sc->sc_mode == WSDISPLAYIO_MODE_MAPPED) &&
(offset >= MGX_BLTOFFSET) && (offset < MGX_BLTOFFSET + 0x1000)) {
return bus_space_mmap(sc->sc_tag, sc->sc_rpaddr,
offset - MGX_BLTOFFSET, prot, BUS_SPACE_MAP_LINEAR);
}
return -1;
}

int
mgxopen(dev_t dev, int flags, int mode, struct lwp *l)
{
device_t dv = device_lookup(&mgx_cd, minor(dev));
struct mgx_softc *sc = device_private(dv);

if (dv == NULL)
return ENXIO;
if (sc->sc_mode == WSDISPLAYIO_MODE_MAPPED)
return 0;
sc->sc_mode = WSDISPLAYIO_MODE_MAPPED;
mgx_setup(sc, MGX_X_DEPTH);
mgx_init_palette(sc);
return 0;
}

int
mgxclose(dev_t dev, int flags, int mode, struct lwp *l)
{
device_t dv = device_lookup(&mgx_cd, minor(dev));
struct mgx_softc *sc = device_private(dv);
struct vcons_screen *ms = sc->vd.active;

if (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)
return 0;

sc->sc_mode = WSDISPLAYIO_MODE_EMUL;

mgx_setup(sc, MGX_DEPTH);
glyphcache_wipe(&sc->sc_gc);
mgx_init_palette(sc);
if (ms != NULL) {
vcons_redraw_screen(ms);
}
return 0;
}

int
mgxioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l)
{
struct mgx_softc *sc = device_lookup_private(&mgx_cd, minor(dev));

return mgx_ioctl(&sc->vd, NULL, cmd, data, flags, l);
}