xref: /src/sys/arch/hppa/dev/gftfb.c

/*	$NetBSD: gftfb.c,v 1.3 2024/02/20 11:37:43 macallan Exp $	*/

/*	$OpenBSD: sti_pci.c,v 1.7 2009/02/06 22:51:04 miod Exp $	*/

/*
 * Copyright (c) 2006, 2007 Miodrag Vallat.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice, this permission notice, and the disclaimer below
 * appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kmem.h>
#include <sys/device.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciio.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/pci/wsdisplay_pci.h>
#include <dev/wscons/wsdisplay_glyphcachevar.h>

#include <dev/ic/stireg.h>
#include <dev/ic/stivar.h>

#ifdef STIDEBUG
#define	DPRINTF(s)	do {	\
	if (stidebug)		\
		printf s;	\
} while(0)

extern int stidebug;
#else
#define	DPRINTF(s)	/* */
#endif

int	gftfb_match(device_t, cfdata_t, void *);
void	gftfb_attach(device_t, device_t, void *);

struct	gftfb_softc {
	device_t		sc_dev;
	pci_chipset_tag_t	sc_pc;
	pcitag_t		sc_tag;

	/* stuff we need in order to use the STI ROM */
	struct sti_softc	sc_base;
	struct sti_screen 	sc_scr;
	bus_space_handle_t	sc_romh;

	int sc_width, sc_height;
	int sc_locked;
	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;
	int sc_mode;
	void (*sc_putchar)(void *, int, int, u_int, long);
	u_char sc_cmap_red[256];
	u_char sc_cmap_green[256];
	u_char sc_cmap_blue[256];
	uint32_t sc_reg10;
	glyphcache sc_gc;
};

CFATTACH_DECL_NEW(gftfb, sizeof(struct gftfb_softc),
    gftfb_match, gftfb_attach, NULL, NULL);

int	gftfb_readbar(struct sti_softc *, struct pci_attach_args *, u_int, int);
int	gftfb_check_rom(struct gftfb_softc *, struct pci_attach_args *);
void	gftfb_enable_rom(struct sti_softc *);
void	gftfb_disable_rom(struct sti_softc *);
void	gftfb_enable_rom_internal(struct gftfb_softc *);
void	gftfb_disable_rom_internal(struct gftfb_softc *);

void 	gftfb_setup(struct gftfb_softc *);

#define	ngle_bt458_write(memt, memh, r, v) \
	bus_space_write_stream_4(memt, memh, NGLE_REG_RAMDAC + ((r) << 2), (v) << 24)


/* XXX these really need to go into their own header */
int	sti_pci_is_console(struct pci_attach_args *, bus_addr_t *);
int	sti_rom_setup(struct sti_rom *, bus_space_tag_t, bus_space_tag_t,
	    bus_space_handle_t, bus_addr_t *, u_int);
int	sti_screen_setup(struct sti_screen *, int);
void	sti_describe_screen(struct sti_softc *, struct sti_screen *);

#define PCI_ROM_SIZE(mr)                                                \
            (PCI_MAPREG_ROM_ADDR(mr) & -PCI_MAPREG_ROM_ADDR(mr))

/* wsdisplay stuff */
static int	gftfb_ioctl(void *, void *, u_long, void *, int,
			     struct lwp *);
static paddr_t	gftfb_mmap(void *, void *, off_t, int);
static void	gftfb_init_screen(void *, struct vcons_screen *, int, long *);

static int	gftfb_putcmap(struct gftfb_softc *, struct wsdisplay_cmap *);
static int 	gftfb_getcmap(struct gftfb_softc *, struct wsdisplay_cmap *);
static void	gftfb_restore_palette(struct gftfb_softc *);
static int 	gftfb_putpalreg(struct gftfb_softc *, uint8_t, uint8_t,
			    uint8_t, uint8_t);

static void	gftfb_rectfill(struct gftfb_softc *, int, int, int, int,
			    uint32_t);
static void	gftfb_bitblt(void *, int, int, int, int, int,
			    int, int);

static void	gftfb_cursor(void *, int, int, int);
static void	gftfb_putchar(void *, int, int, u_int, long);
static void	gftfb_copycols(void *, int, int, int, int);
static void	gftfb_erasecols(void *, int, int, int, long);
static void	gftfb_copyrows(void *, int, int, int);
static void	gftfb_eraserows(void *, int, int, long);

struct wsdisplay_accessops gftfb_accessops = {
	gftfb_ioctl,
	gftfb_mmap,
	NULL,	/* alloc_screen */
	NULL,	/* free_screen */
	NULL,	/* show_screen */
	NULL, 	/* load_font */
	NULL,	/* pollc */
	NULL	/* scroll */
};

#define BA(F,C,S,A,J,B,I)						\
	(((F)<<31)|((C)<<27)|((S)<<24)|((A)<<21)|((J)<<16)|((B)<<12)|(I))

#define IBOvals(R,M,X,S,D,L,B,F)					\
	(((R)<<8)|((M)<<16)|((X)<<24)|((S)<<29)|((D)<<28)|((L)<<31)|((B)<<1)|(F))

#define	    IndexedDcd	0	/* Pixel data is indexed (pseudo) color */
#define	    Otc04	2	/* Pixels in each longword transfer (4) */
#define	    Otc32	5	/* Pixels in each longword transfer (32) */
#define	    Ots08	3	/* Each pixel is size (8)d transfer (1) */
#define	    OtsIndirect	6	/* Each bit goes through FG/BG color(8) */
#define	    AddrLong	5	/* FB address is Long aligned (pixel) */
#define	    BINovly	0x2	/* 8 bit overlay */
#define	    BINapp0I	0x0	/* Application Buffer 0, Indexed */
#define	    BINapp1I	0x1	/* Application Buffer 1, Indexed */
#define	    BINapp0F8	0xa	/* Application Buffer 0, Fractional 8-8-8 */
#define	    BINattr	0xd	/* Attribute Bitmap */
#define	    RopSrc 	0x3
#define	    RopInv 	0xc
#define	    BitmapExtent08  3	/* Each write hits ( 8) bits in depth */
#define	    BitmapExtent32  5	/* Each write hits (32) bits in depth */
#define	    DataDynamic	    0	/* Data register reloaded by direct access */
#define	    MaskDynamic	    1	/* Mask register reloaded by direct access */
#define	    MaskOtc	    0	/* Mask contains Object Count valid bits */

int
gftfb_match(device_t parent, cfdata_t cf, void *aux)
{
	struct pci_attach_args *paa = aux;

	if (PCI_VENDOR(paa->pa_id) != PCI_VENDOR_HP)
		return 0;

	if (PCI_PRODUCT(paa->pa_id) == PCI_PRODUCT_HP_VISUALIZE_EG)
		return 10;	/* beat out sti at pci */

	return 0;
}

void
gftfb_attach(device_t parent, device_t self, void *aux)
{
	struct gftfb_softc *sc = device_private(self);
	struct pci_attach_args *paa = aux;
	struct sti_rom *rom;
	struct rasops_info *ri;
	struct wsemuldisplaydev_attach_args aa;
	unsigned long defattr = 0;
	int ret, is_console = 0, i, j;
	uint8_t cmap[768];

	sc->sc_dev = self;

	sc->sc_pc = paa->pa_pc;
	sc->sc_tag = paa->pa_tag;
	sc->sc_base.sc_dev = self;
	sc->sc_base.sc_enable_rom = gftfb_enable_rom;
	sc->sc_base.sc_disable_rom = gftfb_disable_rom;

	aprint_normal("\n");

	if (gftfb_check_rom(sc, paa) != 0)
		return;

	ret = sti_pci_is_console(paa, sc->sc_base. bases);
	if (ret != 0) {
		sc->sc_base.sc_flags |= STI_CONSOLE;
		is_console = 1;
	}
	rom = (struct sti_rom *)kmem_zalloc(sizeof(*rom), KM_SLEEP);
	rom->rom_softc = &sc->sc_base;
	ret = sti_rom_setup(rom, paa->pa_iot, paa->pa_memt, sc->sc_romh, sc->sc_base.bases, STI_CODEBASE_MAIN);
	if (ret != 0) {
		kmem_free(rom, sizeof(*rom));
		return;
	}

	sc->sc_base.sc_rom = rom;

	sc->sc_scr.scr_rom = sc->sc_base.sc_rom;
	ret = sti_screen_setup(&sc->sc_scr, STI_FBMODE);

	sc->sc_width = sc->sc_scr.scr_cfg.scr_width;
	sc->sc_height = sc->sc_scr.scr_cfg.scr_height;

	aprint_normal_dev(sc->sc_dev, "%s at %dx%d\n", sc->sc_scr.name,
	    sc->sc_width, sc->sc_height);
	gftfb_setup(sc);

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

	vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr,
	    &gftfb_accessops);
	sc->vd.init_screen = gftfb_init_screen;
	sc->vd.show_screen_cookie = &sc->sc_gc;
	sc->vd.show_screen_cb = glyphcache_adapt;

	ri = &sc->sc_console_screen.scr_ri;

	sc->sc_gc.gc_bitblt = gftfb_bitblt;
	sc->sc_gc.gc_blitcookie = sc;
	sc->sc_gc.gc_rop = RopSrc;

	if (is_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,
				sc->sc_scr.fbheight - 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);

		gftfb_rectfill(sc, 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,
				sc->sc_scr.fbheight - sc->sc_height - 5,
				sc->sc_width,
				ri->ri_font->fontwidth,
				ri->ri_font->fontheight,
				defattr);
	}

	j = 0;
	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];
		gftfb_putpalreg(sc, i, cmap[j], cmap[j + 1], cmap[j + 2]);
		j += 3;
	}

	/* no suspend/resume support yet */
	if (!pmf_device_register(sc->sc_dev, NULL, NULL))
		aprint_error_dev(sc->sc_dev,
		    "couldn't establish power handler\n");

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

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

/*
 * Grovel the STI ROM image.
 */
int
gftfb_check_rom(struct gftfb_softc *spc, struct pci_attach_args *pa)
{
	struct sti_softc *sc = &spc->sc_base;
	pcireg_t address, mask;
	bus_space_handle_t romh;
	bus_size_t romsize, subsize, stiromsize;
	bus_addr_t selected, offs, suboffs;
	uint32_t tmp;
	int i;
	int rc;

	/* sort of inline sti_pci_enable_rom(sc) */
	address = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_MAPREG_ROM);
	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_MAPREG_ROM,
	    ~PCI_MAPREG_ROM_ENABLE);
	mask = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_MAPREG_ROM);
	address |= PCI_MAPREG_ROM_ENABLE;
	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_MAPREG_ROM, address);
	sc->sc_flags |= STI_ROM_ENABLED;
	/*
	 * Map the complete ROM for now.
	 */

	romsize = PCI_ROM_SIZE(mask);
	DPRINTF(("%s: mapping rom @ %lx for %lx\n", __func__,
	    (long)PCI_MAPREG_ROM_ADDR(address), (long)romsize));

	rc = bus_space_map(pa->pa_memt, PCI_MAPREG_ROM_ADDR(address), romsize,
	    0, &romh);
	if (rc != 0) {
		aprint_error_dev(sc->sc_dev, "can't map PCI ROM (%d)\n", rc);
		goto fail2;
	}

	gftfb_disable_rom_internal(spc);
	/*
	 * Iterate over the ROM images, pick the best candidate.
	 */

	selected = (bus_addr_t)-1;
	for (offs = 0; offs < romsize; offs += subsize) {
		gftfb_enable_rom_internal(spc);
		/*
		 * Check for a valid ROM header.
		 */
		tmp = bus_space_read_4(pa->pa_memt, romh, offs + 0);
		tmp = le32toh(tmp);
		if (tmp != 0x55aa0000) {
			gftfb_disable_rom_internal(spc);
			if (offs == 0) {
				aprint_error_dev(sc->sc_dev,
				    "invalid PCI ROM header signature (%08x)\n",
				     tmp);
				rc = EINVAL;
			}
			break;
		}

		/*
		 * Check ROM type.
		 */
		tmp = bus_space_read_4(pa->pa_memt, romh, offs + 4);
		tmp = le32toh(tmp);
		if (tmp != 0x00000001) {	/* 1 == STI ROM */
			gftfb_disable_rom_internal(spc);
			if (offs == 0) {
				aprint_error_dev(sc->sc_dev,
				    "invalid PCI ROM type (%08x)\n", tmp);
				rc = EINVAL;
			}
			break;
		}

		subsize = (bus_addr_t)bus_space_read_2(pa->pa_memt, romh,
		    offs + 0x0c);
		subsize <<= 9;

#ifdef STIDEBUG
		gftfb_disable_rom_internal(spc);
		DPRINTF(("ROM offset %08x size %08x type %08x",
		    (u_int)offs, (u_int)subsize, tmp));
		gftfb_enable_rom_internal(spc);
#endif

		/*
		 * Check for a valid ROM data structure.
		 * We do not need it except to know what architecture the ROM
		 * code is for.
		 */

		suboffs = offs +(bus_addr_t)bus_space_read_2(pa->pa_memt, romh,
		    offs + 0x18);
		tmp = bus_space_read_4(pa->pa_memt, romh, suboffs + 0);
		tmp = le32toh(tmp);
		if (tmp != 0x50434952) {	/* PCIR */
			gftfb_disable_rom_internal(spc);
			if (offs == 0) {
				aprint_error_dev(sc->sc_dev, "invalid PCI data"
				    " signature (%08x)\n", tmp);
				rc = EINVAL;
			} else {
				DPRINTF((" invalid PCI data signature %08x\n",
				    tmp));
				continue;
			}
		}

		tmp = bus_space_read_1(pa->pa_memt, romh, suboffs + 0x14);
		gftfb_disable_rom_internal(spc);
		DPRINTF((" code %02x", tmp));

		switch (tmp) {
#ifdef __hppa__
		case 0x10:
			if (selected == (bus_addr_t)-1)
				selected = offs;
			break;
#endif
#ifdef __i386__
		case 0x00:
			if (selected == (bus_addr_t)-1)
				selected = offs;
			break;
#endif
		default:
#ifdef STIDEBUG
			DPRINTF((" (wrong architecture)"));
#endif
			break;
		}
		DPRINTF(("%s\n", selected == offs ? " -> SELECTED" : ""));
	}

	if (selected == (bus_addr_t)-1) {
		if (rc == 0) {
			aprint_error_dev(sc->sc_dev, "found no ROM with "
			    "correct microcode architecture\n");
			rc = ENOEXEC;
		}
		goto fail;
	}

	/*
	 * Read the STI region BAR assignments.
	 */

	gftfb_enable_rom_internal(spc);
	offs = selected +
	    (bus_addr_t)bus_space_read_2(pa->pa_memt, romh, selected + 0x0e);
	for (i = 0; i < STI_REGION_MAX; i++) {
		rc = gftfb_readbar(sc, pa, i,
		    bus_space_read_1(pa->pa_memt, romh, offs + i));
		if (rc != 0)
			goto fail;
	}

	/*
	 * Find out where the STI ROM itself lies, and its size.
	 */

	offs = selected +
	    (bus_addr_t)bus_space_read_4(pa->pa_memt, romh, selected + 0x08);
	stiromsize = (bus_addr_t)bus_space_read_4(pa->pa_memt, romh,
	    offs + 0x18);
	stiromsize = le32toh(stiromsize);
	gftfb_disable_rom_internal(spc);

	/*
	 * Replace our mapping with a smaller mapping of only the area
	 * we are interested in.
	 */

	DPRINTF(("remapping rom @ %lx for %lx\n",
	    (long)(PCI_MAPREG_ROM_ADDR(address) + offs), (long)stiromsize));
	bus_space_unmap(pa->pa_memt, romh, romsize);
	rc = bus_space_map(pa->pa_memt, PCI_MAPREG_ROM_ADDR(address) + offs,
	    stiromsize, 0, &spc->sc_romh);
	if (rc != 0) {
		aprint_error_dev(sc->sc_dev, "can't map STI ROM (%d)\n",
		    rc);
		goto fail2;
	}
 	gftfb_disable_rom_internal(spc);
	sc->sc_flags &= ~STI_ROM_ENABLED;

	return 0;

fail:
	bus_space_unmap(pa->pa_memt, romh, romsize);
fail2:
	gftfb_disable_rom_internal(spc);

	return rc;
}

/*
 * Decode a BAR register.
 */
int
gftfb_readbar(struct sti_softc *sc, struct pci_attach_args *pa, u_int region,
    int bar)
{
	bus_addr_t addr;
	bus_size_t size;
	uint32_t cf;
	int rc;

	if (bar == 0) {
		sc->bases[region] = 0;
		return (0);
	}

#ifdef DIAGNOSTIC
	if (bar < PCI_MAPREG_START || bar > PCI_MAPREG_PPB_END) {
		gftfb_disable_rom(sc);
		printf("%s: unexpected bar %02x for region %d\n",
		    device_xname(sc->sc_dev), bar, region);
		gftfb_enable_rom(sc);
	}
#endif

	cf = pci_conf_read(pa->pa_pc, pa->pa_tag, bar);

	rc = pci_mapreg_info(pa->pa_pc, pa->pa_tag, bar, PCI_MAPREG_TYPE(cf),
	    &addr, &size, NULL);

	if (rc != 0) {
		gftfb_disable_rom(sc);
		aprint_error_dev(sc->sc_dev, "invalid bar %02x for region %d\n",
		    bar, region);
		gftfb_enable_rom(sc);
		return (rc);
	}

	sc->bases[region] = addr;
	return (0);
}

/*
 * Enable PCI ROM.
 */
void
gftfb_enable_rom_internal(struct gftfb_softc *spc)
{
	pcireg_t address;

	KASSERT(spc != NULL);

	address = pci_conf_read(spc->sc_pc, spc->sc_tag, PCI_MAPREG_ROM);
	address |= PCI_MAPREG_ROM_ENABLE;
	pci_conf_write(spc->sc_pc, spc->sc_tag, PCI_MAPREG_ROM, address);
}

void
gftfb_enable_rom(struct sti_softc *sc)
{
	struct gftfb_softc *spc = device_private(sc->sc_dev);

	if (!ISSET(sc->sc_flags, STI_ROM_ENABLED)) {
		gftfb_enable_rom_internal(spc);
	}
	SET(sc->sc_flags, STI_ROM_ENABLED);
}

/*
 * Disable PCI ROM.
 */
void
gftfb_disable_rom_internal(struct gftfb_softc *spc)
{
	pcireg_t address;

	KASSERT(spc != NULL);

	address = pci_conf_read(spc->sc_pc, spc->sc_tag, PCI_MAPREG_ROM);
	address &= ~PCI_MAPREG_ROM_ENABLE;
	pci_conf_write(spc->sc_pc, spc->sc_tag, PCI_MAPREG_ROM, address);
}

void
gftfb_disable_rom(struct sti_softc *sc)
{
	struct gftfb_softc *spc = device_private(sc->sc_dev);

	if (ISSET(sc->sc_flags, STI_ROM_ENABLED)) {
		gftfb_disable_rom_internal(spc);
	}
	CLR(sc->sc_flags, STI_ROM_ENABLED);
}

static inline void
gftfb_wait(struct gftfb_softc *sc)
{
	struct sti_rom *rom = sc->sc_base.sc_rom;
	bus_space_tag_t memt = rom->memt;
	bus_space_handle_t memh = rom->regh[2];
	uint8_t stat;

	do {
		stat = bus_space_read_1(memt, memh, NGLE_REG_15b0);
		if (stat == 0)
			stat = bus_space_read_1(memt, memh, NGLE_REG_15b0);
	} while (stat != 0);
}

static inline void
gftfb_setup_fb(struct gftfb_softc *sc)
{
	struct sti_rom *rom = sc->sc_base.sc_rom;
	bus_space_tag_t memt = rom->memt;
	bus_space_handle_t memh = rom->regh[2];

	gftfb_wait(sc);
	bus_space_write_stream_4(memt, memh, NGLE_REG_10, 0x13601000);
	bus_space_write_stream_4(memt, memh, NGLE_REG_14, 0x83000300);
	gftfb_wait(sc);
	bus_space_write_1(memt, memh, NGLE_REG_16b1, 1);
}

void
gftfb_setup(struct gftfb_softc *sc)
{
	struct sti_rom *rom = sc->sc_base.sc_rom;
	bus_space_tag_t memt = rom->memt;
	bus_space_handle_t memh = rom->regh[2];

	sc->sc_reg10 = 0;

	/* set Bt458 read mask register to all planes */
	gftfb_wait(sc);
	ngle_bt458_write(memt, memh, 0x08, 0x04);
	ngle_bt458_write(memt, memh, 0x0a, 0xff);

	gftfb_setup_fb(sc);

	/* attr. planes */
	gftfb_wait(sc);
	bus_space_write_stream_4(memt, memh, NGLE_REG_11, 0x2ea0d000);
	bus_space_write_stream_4(memt, memh, NGLE_REG_14, 0x23000302);
	bus_space_write_stream_4(memt, memh, NGLE_REG_12, NGLE_ARTIST_CMAP0);
	bus_space_write_stream_4(memt, memh, NGLE_REG_8, 0xffffffff);

	gftfb_wait(sc);
	bus_space_write_stream_4(memt, memh, NGLE_REG_6, 0x00000000);
	bus_space_write_stream_4(memt, memh, NGLE_REG_9,
	    (sc->sc_scr.scr_cfg.scr_width << 16) | sc->sc_scr.scr_cfg.scr_height);
	bus_space_write_stream_4(memt, memh, NGLE_REG_6, 0x05000000);
	bus_space_write_stream_4(memt, memh, NGLE_REG_9, 0x00040001);

	gftfb_wait(sc);
	bus_space_write_stream_4(memt, memh, NGLE_REG_12, 0x00000000);

	gftfb_setup_fb(sc);

	gftfb_wait(sc);
	bus_space_write_stream_4(memt, memh, NGLE_REG_21,
	    bus_space_read_stream_4(memt, memh, NGLE_REG_21) | 0x0a000000);
	bus_space_write_stream_4(memt, memh, NGLE_REG_27,
	    bus_space_read_stream_4(memt, memh, NGLE_REG_27) | 0x00800000);
}

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

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

	/* PCI config read/write passthrough. */
	case PCI_IOC_CFGREAD:
	case PCI_IOC_CFGWRITE:
		return pci_devioctl(sc->sc_pc, sc->sc_tag,
		    cmd, data, flag, l);

	case WSDISPLAYIO_GET_BUSID:
		return wsdisplayio_busid_pci(sc->sc_dev, sc->sc_pc,
		    sc->sc_tag, data);

	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 = ms->scr_ri.ri_depth;
		wdf->cmsize = 256;
		return 0;

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

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

	case WSDISPLAYIO_LINEBYTES:
		*(u_int *)data = 2048;
		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) {
				gftfb_setup(sc);
				if (0) gftfb_restore_palette(sc);
				glyphcache_wipe(&sc->sc_gc);
				gftfb_rectfill(sc, 0, 0, sc->sc_width,
				    sc->sc_height, ms->scr_ri.ri_devcmap[
				    (ms->scr_defattr >> 16) & 0xff]);
				vcons_redraw_screen(ms);
			}
		}
		}
		return 0;

	case WSDISPLAYIO_GET_FBINFO:
	{
			struct wsdisplayio_fbinfo *fbi = data;

		return wsdisplayio_get_fbinfo(&ms->scr_ri, fbi);
	}
	}
	return EPASSTHROUGH;
}

static paddr_t
gftfb_mmap(void *v, void *vs, off_t offset, int prot)
{
	struct vcons_data *vd = v;
	struct gftfb_softc *sc = vd->cookie;
	struct sti_rom *rom = sc->sc_base.sc_rom;
	paddr_t pa;

	if (offset < 0 || offset >= sc->sc_scr.fblen)
		return -1;

	if (sc->sc_mode != WSDISPLAYIO_MODE_DUMBFB)
		return -1;

	pa = bus_space_mmap(rom->memt, sc->sc_scr.fbaddr, offset, prot,
	    BUS_SPACE_MAP_LINEAR);
	return pa;
}

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

	ri->ri_depth = 8;
	ri->ri_width = sc->sc_width;
	ri->ri_height = sc->sc_height;
	ri->ri_stride = 2048;
	ri->ri_flg = RI_CENTER | RI_8BIT_IS_RGB |
		     RI_ENABLE_ALPHA | RI_PREFER_ALPHA;

	ri->ri_bits = (void *)sc->sc_scr.fbaddr;
	rasops_init(ri, 0, 0);
	ri->ri_caps = WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_UNDERLINE |
		      WSSCREEN_RESIZE;
	scr->scr_flags |= VCONS_LOADFONT;

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

	ri->ri_hw = scr;
	sc->sc_putchar = ri->ri_ops.putchar;
	ri->ri_ops.copyrows = gftfb_copyrows;
	ri->ri_ops.copycols = gftfb_copycols;
	ri->ri_ops.eraserows = gftfb_eraserows;
	ri->ri_ops.erasecols = gftfb_erasecols;
	ri->ri_ops.cursor = gftfb_cursor;
	ri->ri_ops.putchar = gftfb_putchar;
}

static int
gftfb_putcmap(struct gftfb_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++) {
		gftfb_putpalreg(sc, index, *r, *g, *b);
		index++;
		r++, g++, b++;
	}
	return 0;
}

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

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

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

	return 0;
}

static void
gftfb_restore_palette(struct gftfb_softc *sc)
{
	int i;

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

static int
gftfb_putpalreg(struct gftfb_softc *sc, uint8_t idx, uint8_t r, uint8_t g,
    uint8_t b)
{
	struct sti_rom *rom = sc->sc_base.sc_rom;
	bus_space_tag_t memt = rom->memt;
	bus_space_handle_t memh = rom->regh[2];

	gftfb_wait(sc);
	bus_space_write_stream_4(memt, memh, NGLE_REG_10, 0xbbe0f000);
	bus_space_write_stream_4(memt, memh, NGLE_REG_14, 0x03000300);
	bus_space_write_stream_4(memt, memh, NGLE_REG_13, 0xffffffff);

	gftfb_wait(sc);
	bus_space_write_stream_4(memt, memh, NGLE_REG_3,
	    0x400 | (idx << 2));
	bus_space_write_stream_4(memt, memh, NGLE_REG_4,
	    (r << 16) | (g << 8) | b);

	bus_space_write_stream_4(memt, memh, NGLE_REG_2, 0x400);
	bus_space_write_stream_4(memt, memh, NGLE_REG_26, 0x80000100);
	gftfb_setup_fb(sc);
	return 0;
}

static inline void
gftfb_wait_fifo(struct gftfb_softc *sc, uint32_t slots)
{
	struct sti_rom *rom = sc->sc_base.sc_rom;
	bus_space_tag_t memt = rom->memt;
	bus_space_handle_t memh = rom->regh[2];
	uint32_t reg;

	do {
		reg = bus_space_read_stream_4(memt, memh, NGLE_REG_34);
	} while (reg < slots);
}

static void
gftfb_rectfill(struct gftfb_softc *sc, int x, int y, int wi, int he,
		      uint32_t bg)
{
	struct sti_rom *rom = sc->sc_base.sc_rom;
	bus_space_tag_t memt = rom->memt;
	bus_space_handle_t memh = rom->regh[2];

	gftfb_wait_fifo(sc, 5);
	/* transfer data */
	bus_space_write_stream_4(memt, memh, NGLE_REG_8, 0xffffffff);
	bus_space_write_stream_4(memt, memh, NGLE_REG_35, bg);
	/* plane mask */
	bus_space_write_stream_4(memt, memh, NGLE_REG_13, 0xff);
	/* bitmap op */
	bus_space_write_stream_4(memt, memh, NGLE_REG_14,
	    IBOvals(RopSrc, 0, BitmapExtent08, 0, DataDynamic, MaskOtc, 0, 0));
	/* dst bitmap access */
	bus_space_write_stream_4(memt, memh, NGLE_REG_11,
	    BA(IndexedDcd, Otc32, OtsIndirect, AddrLong, 0, BINapp0I, 0));
	gftfb_wait_fifo(sc, 2);
	/* dst XY */
	bus_space_write_stream_4(memt, memh, NGLE_REG_6, (x << 16) | y);
	/* len XY start */
	bus_space_write_stream_4(memt, memh, NGLE_REG_9, (wi << 16) | he);

}


static void
gftfb_bitblt(void *cookie, int xs, int ys, int xd, int yd, int wi,
			    int he, int rop)
{
	struct gftfb_softc *sc = cookie;
	struct sti_rom *rom = sc->sc_base.sc_rom;
	bus_space_tag_t memt = rom->memt;
	bus_space_handle_t memh = rom->regh[2];

	gftfb_wait(sc);
	bus_space_write_stream_4(memt, memh, NGLE_REG_10, 0x13a01000);
	gftfb_wait_fifo(sc, 5);
	bus_space_write_stream_4(memt, memh, NGLE_REG_14, ((rop << 8) & 0xf00) | 0x23000000);
	bus_space_write_stream_4(memt, memh, NGLE_REG_13, 0xff);
	bus_space_write_stream_4(memt, memh, NGLE_REG_24, (xs << 16) | ys);
	bus_space_write_stream_4(memt, memh, NGLE_REG_7, (wi << 16) | he);
	bus_space_write_stream_4(memt, memh, NGLE_REG_25, (xd << 16) | yd);
}

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

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

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

}

static void
gftfb_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 gftfb_softc *sc = scr->scr_cookie;
	int x, y, wi, he, rv = GC_NOPE;
#if 0
	uint32_t bg;
#endif
	if (sc->sc_mode != WSDISPLAYIO_MODE_EMUL)
		return;

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

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

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

	/* XXX
	 * rectfill currently draws rectangles less than 32 pixels wide as
	 * 32 pixels wide, no idea why. So until I figure that one out we
	 * draw blanks by software
	 * bitblt doesn't seem to have this problem
	 */
	if (c == 0x20) {
		gftfb_rectfill(sc, x, y, wi, he, bg);
		return;
	}
#endif
	rv = glyphcache_try(&sc->sc_gc, c, x, y, attr);
	if (rv == GC_OK)
		return;

	gftfb_setup_fb(sc);
	sc->sc_putchar(cookie, row, col, c, attr);

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

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

	if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
		xs = ri->ri_xorigin + ri->ri_font->fontwidth * srccol;
		xd = ri->ri_xorigin + ri->ri_font->fontwidth * dstcol;
		y = ri->ri_yorigin + ri->ri_font->fontheight * row;
		width = ri->ri_font->fontwidth * ncols;
		height = ri->ri_font->fontheight;
		gftfb_bitblt(sc, xs, y, xd, y, width, height, RopSrc);
	}
}

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

	if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
		x = ri->ri_xorigin + ri->ri_font->fontwidth * startcol;
		y = ri->ri_yorigin + ri->ri_font->fontheight * row;
		width = ri->ri_font->fontwidth * ncols;
		height = ri->ri_font->fontheight;
		rasops_unpack_attr(fillattr, &fg, &bg, &ul);

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

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

	if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
		x = ri->ri_xorigin;
		ys = ri->ri_yorigin + ri->ri_font->fontheight * srcrow;
		yd = ri->ri_yorigin + ri->ri_font->fontheight * dstrow;
		width = ri->ri_emuwidth;
		height = ri->ri_font->fontheight * nrows;
		gftfb_bitblt(sc, x, ys, x, yd, width, height, RopSrc);
	}
}

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

	if ((sc->sc_locked == 0) && (sc->sc_mode == WSDISPLAYIO_MODE_EMUL)) {
		x = ri->ri_xorigin;
		y = ri->ri_yorigin + ri->ri_font->fontheight * row;
		width = ri->ri_emuwidth;
		height = ri->ri_font->fontheight * nrows;
		rasops_unpack_attr(fillattr, &fg, &bg, &ul);

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