/*      $NetBSD: sti.c,v 1.47 2025/05/30 19:42:28 tsutsui Exp $ */

/*      $OpenBSD: sti.c,v 1.61 2009/09/05 14:09:35 miod Exp $   */

/*
 * Copyright (c) 2000-2003 Michael Shalayeff
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES 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 MIND, 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.
 */
/*
 * TODO:
 *      call sti procs asynchronously;
 *      implement console scroll-back;
 *      X11 support on more models.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sti.c,v 1.47 2025/05/30 19:42:28 tsutsui Exp $");

#include "wsdisplay.h"

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

#include <uvm/uvm_extern.h>

#include <sys/bus.h>

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

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

#ifdef STIDEBUG

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

int stidebug = 1;
#else
#define DPRINTF(s)      /* */
#endif

void sti_cursor(void *, int, int, int);
int  sti_mapchar(void *, int, u_int *);
void sti_putchar(void *, int, int, u_int, long);
void sti_copycols(void *, int, int, int, int);
void sti_erasecols(void *, int, int, int, long);
void sti_copyrows(void *, int, int, int);
void sti_eraserows(void *, int, int, long);
int  sti_alloc_attr(void *, int, int, int, long *);

/* pseudo attribute ops for sti ROM putchar function */
#define WSATTR_FG_SHIFT 24
#define WSATTR_BG_SHIFT 16
#define WSATTR_UNPACK_FG(attr)  (((attr) >> WSATTR_FG_SHIFT) & 0xff)
#define WSATTR_UNPACK_BG(attr)  (((attr) >> WSATTR_BG_SHIFT) & 0xff)
#define WSATTR_UNPACK_FLAG(attr) ((attr) & WSATTR_USERMASK)
#define WSATTR_PACK_FG(fg)      ((fg) << WSATTR_FG_SHIFT)
#define WSATTR_PACK_BG(bg)      ((bg) << WSATTR_BG_SHIFT)
#define WSATTR_PACK_FLAG(flag)  ((flag))
#define WSATTR_PACK(fg, bg, flag)       \
    (WSATTR_PACK_FG(fg) | WSATTR_PACK_BG(bg) | WSATTR_PACK_FLAG(flag))

struct wsdisplay_emulops sti_emulops = {
        .cursor = sti_cursor,
        .mapchar = sti_mapchar,
        .putchar = sti_putchar,
        .copycols = sti_copycols,
        .erasecols = sti_erasecols,
        .copyrows = sti_copyrows,
        .eraserows = sti_eraserows,
        .allocattr = sti_alloc_attr
};

const struct wsdisplay_accessops sti_accessops = {
        .ioctl = sti_ioctl,
        .mmap = sti_mmap,
        .alloc_screen = sti_alloc_screen,
        .free_screen = sti_free_screen,
        .show_screen = sti_show_screen,
        .load_font = sti_load_font
};

enum sti_bmove_funcs {
        bmf_clear, bmf_copy, bmf_invert, bmf_underline
};

void    sti_bmove(struct sti_screen *, int, int, int, int, int, int,
            enum sti_bmove_funcs);
int     sti_inqcfg(struct sti_screen *, struct sti_inqconfout *);
int     sti_setcment(struct sti_screen *, u_int, u_char, u_char, u_char);

struct sti_screen *sti_attach_screen(struct sti_softc *, int);
void    sti_describe_screen(struct sti_softc *, struct sti_screen *);

int     sti_fetchfonts(struct sti_screen *, struct sti_inqconfout *, uint32_t,
            u_int);
void    sti_region_setup(struct sti_screen *);
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);

int     ngle_default_putcmap(struct sti_screen *, u_int, u_int);

#ifndef SMALL_KERNEL
void    ngle_artist_setupfb(struct sti_screen *);
void    ngle_elk_setupfb(struct sti_screen *);
void    ngle_timber_setupfb(struct sti_screen *);
void    summit_setupfb(struct sti_screen *);
int     ngle_putcmap(struct sti_screen *, u_int, u_int);
int     ngle_hcrx_putcmap(struct sti_screen *, u_int, u_int);
int     summit_putcmap(struct sti_screen *, u_int, u_int);
#endif

#define STI_ENABLE_ROM(sc) \
do { \
        if ((sc) != NULL && (sc)->sc_enable_rom != NULL) \
                (*(sc)->sc_enable_rom)(sc); \
} while (0)
#define STI_DISABLE_ROM(sc) \
do { \
        if ((sc) != NULL && (sc)->sc_disable_rom != NULL) \
                (*(sc)->sc_disable_rom)(sc); \
} while (0)

/* Macros to read larger than 8 bit values from byte roms */
#define parseshort(o) \
        ((bus_space_read_1(memt, romh, (o) + 3) <<  8) | \
         (bus_space_read_1(memt, romh, (o) + 7)))
#define parseword(o) \
        ((bus_space_read_1(memt, romh, (o) +  3) << 24) | \
         (bus_space_read_1(memt, romh, (o) +  7) << 16) | \
         (bus_space_read_1(memt, romh, (o) + 11) <<  8) | \
         (bus_space_read_1(memt, romh, (o) + 15)))

int
sti_attach_common(struct sti_softc *sc, bus_space_tag_t iot,
    bus_space_tag_t memt, bus_space_handle_t romh, u_int codebase)
{
        struct sti_rom *rom;
        int rc;

        rom = (struct sti_rom *)malloc(sizeof(*rom), M_DEVBUF,
            M_WAITOK | M_ZERO);
        rom->rom_softc = sc;
        rc = sti_rom_setup(rom, iot, memt, romh, sc->bases, codebase);
        if (rc != 0) {
                free(rom, M_DEVBUF);
                return rc;
        }

        sc->sc_rom = rom;

        sti_describe(sc);

        sc->sc_scr = sti_attach_screen(sc,
            sc->sc_flags & STI_CONSOLE ? 0 : STI_CLEARSCR);
        if (sc->sc_scr == NULL)
                rc = ENOMEM;

        return rc;
}

struct sti_screen *
sti_attach_screen(struct sti_softc *sc, int flags)
{
        struct sti_screen *scr;
        int rc;

        scr = (struct sti_screen *)malloc(sizeof(*scr), M_DEVBUF,
            M_WAITOK | M_ZERO);
        scr->scr_rom = sc->sc_rom;
        rc = sti_screen_setup(scr, flags);
        if (rc != 0) {
                free(scr, M_DEVBUF);
                return NULL;
        }

        sti_describe_screen(sc, scr);

        return scr;
}

int
sti_rom_setup(struct sti_rom *rom, bus_space_tag_t iot, bus_space_tag_t memt,
    bus_space_handle_t romh, bus_addr_t *bases, u_int codebase)
{
        struct sti_dd *dd;
        int error, size, i;

        KASSERT(rom != NULL);
        STI_ENABLE_ROM(rom->rom_softc);

        rom->iot = iot;
        rom->memt = memt;
        rom->romh = romh;
        rom->bases = bases;

        /*
         * Get ROM header and code function pointers.
         */

        dd = &rom->rom_dd;
        rom->rom_devtype = bus_space_read_1(memt, romh, 3);
        if (rom->rom_devtype == STI_DEVTYPE1) {
                dd->dd_type      = bus_space_read_1(memt, romh, 0x03);
                dd->dd_nmon      = bus_space_read_1(memt, romh, 0x07);
                dd->dd_grrev     = bus_space_read_1(memt, romh, 0x0b);
                dd->dd_lrrev     = bus_space_read_1(memt, romh, 0x0f);
                dd->dd_grid[0]   = parseword(0x10);
                dd->dd_grid[1]   = parseword(0x20);
                dd->dd_fntaddr   = parseword(0x30) & ~3;
                dd->dd_maxst     = parseword(0x40);
                dd->dd_romend    = parseword(0x50) & ~3;
                dd->dd_reglst    = parseword(0x60) & ~3;
                dd->dd_maxreent  = parseshort(0x70);
                dd->dd_maxtimo   = parseshort(0x78);
                dd->dd_montbl    = parseword(0x80) & ~3;
                dd->dd_udaddr    = parseword(0x90) & ~3;
                dd->dd_stimemreq = parseword(0xa0);
                dd->dd_udsize    = parseword(0xb0);
                dd->dd_pwruse    = parseshort(0xc0);
                dd->dd_bussup    = bus_space_read_1(memt, romh, 0xcb);
                dd->dd_ebussup   = bus_space_read_1(memt, romh, 0xcf);
                dd->dd_altcodet  = bus_space_read_1(memt, romh, 0xd3);
                dd->dd_eddst[0]  = bus_space_read_1(memt, romh, 0xd7);
                dd->dd_eddst[1]  = bus_space_read_1(memt, romh, 0xdb);
                dd->dd_eddst[2]  = bus_space_read_1(memt, romh, 0xdf);
                dd->dd_cfbaddr   = parseword(0xe0) & ~3;

                codebase <<= 2;
                dd->dd_pacode[0x0] = parseword(codebase + 0x000) & ~3;
                dd->dd_pacode[0x1] = parseword(codebase + 0x010) & ~3;
                dd->dd_pacode[0x2] = parseword(codebase + 0x020) & ~3;
                dd->dd_pacode[0x3] = parseword(codebase + 0x030) & ~3;
                dd->dd_pacode[0x4] = parseword(codebase + 0x040) & ~3;
                dd->dd_pacode[0x5] = parseword(codebase + 0x050) & ~3;
                dd->dd_pacode[0x6] = parseword(codebase + 0x060) & ~3;
                dd->dd_pacode[0x7] = parseword(codebase + 0x070) & ~3;
                dd->dd_pacode[0x8] = parseword(codebase + 0x080) & ~3;
                dd->dd_pacode[0x9] = parseword(codebase + 0x090) & ~3;
                dd->dd_pacode[0xa] = parseword(codebase + 0x0a0) & ~3;
                dd->dd_pacode[0xb] = parseword(codebase + 0x0b0) & ~3;
                dd->dd_pacode[0xc] = parseword(codebase + 0x0c0) & ~3;
                dd->dd_pacode[0xd] = parseword(codebase + 0x0d0) & ~3;
                dd->dd_pacode[0xe] = parseword(codebase + 0x0e0) & ~3;
                dd->dd_pacode[0xf] = parseword(codebase + 0x0f0) & ~3;
        } else {        /* STI_DEVTYPE4 */
                bus_space_read_region_stream_4(memt, romh, 0, (uint32_t *)dd,
                    sizeof(*dd) / 4);
                /* fix pacode... */
                bus_space_read_region_stream_4(memt, romh, codebase,
                    (uint32_t *)dd->dd_pacode, sizeof(dd->dd_pacode) / 4);
        }

        STI_DISABLE_ROM(rom->rom_softc);

        DPRINTF(("dd:\n"
            "devtype=%x, rev=%x;%d, altt=%x, gid=%08x%08x, font=%x, mss=%x\n"
            "end=%x, regions=%x, msto=%x, timo=%d, mont=%x, user=%x[%x]\n"
            "memrq=%x, pwr=%d, bus=%x, ebus=%x, cfb=%x\n"
            "code=",
            dd->dd_type & 0xff, dd->dd_grrev, dd->dd_lrrev, dd->dd_altcodet,
            dd->dd_grid[0], dd->dd_grid[1], dd->dd_fntaddr, dd->dd_maxst,
            dd->dd_romend, dd->dd_reglst, dd->dd_maxreent, dd->dd_maxtimo,
            dd->dd_montbl, dd->dd_udaddr, dd->dd_udsize, dd->dd_stimemreq,
            dd->dd_pwruse, dd->dd_bussup, dd->dd_ebussup, dd->dd_cfbaddr));
        DPRINTF(("%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x,%x\n",
            dd->dd_pacode[0x0], dd->dd_pacode[0x1], dd->dd_pacode[0x2],
            dd->dd_pacode[0x3], dd->dd_pacode[0x4], dd->dd_pacode[0x5],
            dd->dd_pacode[0x6], dd->dd_pacode[0x7], dd->dd_pacode[0x8],
            dd->dd_pacode[0x9], dd->dd_pacode[0xa], dd->dd_pacode[0xb],
            dd->dd_pacode[0xc], dd->dd_pacode[0xd], dd->dd_pacode[0xe],
            dd->dd_pacode[0xf]));

        /*
         * Figure out how many bytes we need for the STI code.
         * Note there could be fewer than STI_END pointer entries
         * populated, especially on older devices.
         */
        for (i = STI_END; dd->dd_pacode[i] == 0; i--)
                ;

        size = dd->dd_pacode[i] - dd->dd_pacode[STI_BEGIN];

        if (rom->rom_devtype == STI_DEVTYPE1)
                size = (size + 3) / 4;
        if (size == 0) {
                aprint_error(": no code for the requested platform\n");
                return EINVAL;
        }

        if (!(rom->rom_code = uvm_km_alloc(kernel_map, round_page(size), 0,
            UVM_KMF_WIRED))) {
                aprint_error(": cannot allocate %u bytes for code\n", size);
                return ENOMEM;
        }
        DPRINTF(("code=0x%lx[%x]\n", rom->rom_code, size));

        /*
         * Copy code into memory and make it executable.
         */

        STI_ENABLE_ROM(rom->rom_softc);

        if (rom->rom_devtype == STI_DEVTYPE1) {
                uint8_t *p;
                uint32_t addr, eaddr;

                p = (uint8_t *)rom->rom_code;

                for (addr = dd->dd_pacode[STI_BEGIN], eaddr = addr + size * 4;
                    addr < eaddr; addr += 4 ) {
                        *p++ = bus_space_read_4(memt, romh, addr) & 0xff;
                }
        } else {        /* STI_DEVTYPE4 */
                bus_space_read_region_stream_4(memt, romh,
                    dd->dd_pacode[STI_BEGIN], (uint32_t *)rom->rom_code,
                    size / 4);
        }

        STI_DISABLE_ROM(rom->rom_softc);

        if ((error = uvm_map_protect(kernel_map, rom->rom_code,
            rom->rom_code + round_page(size), UVM_PROT_RX, FALSE))) {
                aprint_error(": uvm_map_protect failed (%d)\n", error);
                uvm_km_free(kernel_map, rom->rom_code, round_page(size),
                    UVM_KMF_WIRED);
                return error;
        }

        /*
         * Setup code function pointers.
         */

#define O(i) \
        (dd->dd_pacode[(i)] == 0 ? 0 : \
            (rom->rom_code + (dd->dd_pacode[(i)] - dd->dd_pacode[0]) /  \
            (rom->rom_devtype == STI_DEVTYPE1 ? 4 : 1)))

        rom->init       = (sti_init_t)O(STI_INIT_GRAPH);
        rom->mgmt       = (sti_mgmt_t)O(STI_STATE_MGMT);
        rom->unpmv      = (sti_unpmv_t)O(STI_FONT_UNPMV);
        rom->blkmv      = (sti_blkmv_t)O(STI_BLOCK_MOVE);
        rom->test       = (sti_test_t)O(STI_SELF_TEST);
        rom->exhdl      = (sti_exhdl_t)O(STI_EXCEP_HDLR);
        rom->inqconf    = (sti_inqconf_t)O(STI_INQ_CONF);
        rom->scment     = (sti_scment_t)O(STI_SCM_ENT);
        rom->dmac       = (sti_dmac_t)O(STI_DMA_CTRL);
        rom->flowc      = (sti_flowc_t)O(STI_FLOW_CTRL);
        rom->utiming    = (sti_utiming_t)O(STI_UTIMING);
        rom->pmgr       = (sti_pmgr_t)O(STI_PROC_MGR);
        rom->util       = (sti_util_t)O(STI_UTIL);

#undef O

        /*
         * Set colormap entry is not implemented until 8.04, so force
         * a NULL pointer here.
         */
        if (dd->dd_grrev < STI_REVISION(8, 4)) {
                rom->scment = NULL;
        }

        return 0;
}

/*
 * Map all regions.
 */
void
sti_region_setup(struct sti_screen *scr)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t romh = rom->romh;
        bus_addr_t *bases = rom->bases;
        struct sti_dd *dd = &rom->rom_dd;
        struct sti_cfg *cc = &scr->scr_cfg;
        struct sti_region regions[STI_REGION_MAX], *r;
        u_int regno, regcnt;
        bus_addr_t addr;

        DPRINTF(("stiregions @ %x:\n", dd->dd_reglst));

        /*
         * Read the region information.
         */

        STI_ENABLE_ROM(rom->rom_softc);

        if (rom->rom_devtype == STI_DEVTYPE1) {
                for (regno = 0; regno < STI_REGION_MAX; regno++)
                        *(u_int *)(regions + regno) =
                            parseword(dd->dd_reglst + regno * 0x10);
        } else {
                bus_space_read_region_stream_4(memt, romh, dd->dd_reglst,
                    (uint32_t *)regions, sizeof(regions) / 4);
        }

        STI_DISABLE_ROM(rom->rom_softc);

        /*
         * Count them.
         */

        for (regcnt = 0, r = regions; regcnt < STI_REGION_MAX; regcnt++, r++)
                if (r->last)
                        break;
        regcnt++;

        /*
         * Map them.
         */

        for (regno = 0, r = regions; regno < regcnt; regno++, r++) {
                if (r->length == 0)
                        continue;

                /*
                 * Assume an existing mapping exists.
                 */
                addr = bases[regno] + (r->offset << STI_PGSHIFT);
                DPRINTF(("%08x @ 0x%08x%s%s%s%s",
                    r->length << STI_PGSHIFT, (int)addr,
                    r->sys_only ? " sys" : "",
                    r->cache ? " cache" : "", r->btlb ? " btlb" : "",
                    r->last ? " last" : ""));

                /*
                 * Region #0 is always the rom, and it should have been
                 * mapped already.
                 * XXX This expects a 1:1 mapping...
                 */
                if (regno == 0 && romh == bases[0]) {
                        cc->regions[0] = addr;
                        DPRINTF(("\n"));
                        continue;
                }

                if (bus_space_map(memt, addr, r->length << STI_PGSHIFT,
                    BUS_SPACE_MAP_LINEAR | (r->cache ?
                    BUS_SPACE_MAP_CACHEABLE : 0), &rom->regh[regno]) != 0) {
                        rom->regh[regno] = romh;        /* XXX */
                        DPRINTF((" - already mapped region\n"));
                } else {
                        addr = (bus_addr_t)
                            bus_space_vaddr(memt, rom->regh[regno]);
                        if (regno == 1) {
                                DPRINTF((" - fb"));
                                scr->fbaddr = addr;
                                scr->fblen = r->length << STI_PGSHIFT;
                        }
                        DPRINTF(("\n"));
                }

                cc->regions[regno] = addr;
        }

#ifdef STIDEBUG
        /*
         * Make sure we'll trap accessing unmapped regions
         */
        for (regno = 0; regno < STI_REGION_MAX; regno++)
                if (cc->regions[regno] == 0)
                        cc->regions[regno] = 0x81234567;
#endif
}

int
sti_screen_setup(struct sti_screen *scr, int flags)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t romh = rom->romh;
        struct sti_dd *dd = &rom->rom_dd;
        struct sti_cfg *cc = &scr->scr_cfg;
        struct sti_inqconfout cfg;
        struct sti_einqconfout ecfg;
#ifdef STIDEBUG
        char buf[256];
#endif
        int error, i;
        int geometry_kluge = 0;
        u_int fontindex = 0;

        KASSERT(scr != NULL);
        memset(cc, 0, sizeof(*cc));
        cc->ext_cfg = &scr->scr_ecfg;
        memset(cc->ext_cfg, 0, sizeof(*cc->ext_cfg));

        if (dd->dd_stimemreq) {
                scr->scr_ecfg.addr =
                    malloc(dd->dd_stimemreq, M_DEVBUF, M_WAITOK);
        }

        sti_region_setup(scr);

        if ((error = sti_init(scr, 0))) {
                aprint_error(": cannot initialize (%d)\n", error);
                goto fail;
        }

        memset(&cfg, 0, sizeof(cfg));
        memset(&ecfg, 0, sizeof(ecfg));
        cfg.ext = &ecfg;
        if ((error = sti_inqcfg(scr, &cfg))) {
                aprint_error(": error %d inquiring config\n", error);
                goto fail;
        }

        /*
         * Older (rev 8.02) boards report wrong offset values,
         * similar to the displayable area size, at least in m68k mode.
         * Attempt to detect this and adjust here.
         */
        if (cfg.owidth == cfg.width &&
            cfg.oheight == cfg.height)
                geometry_kluge = 1;

        if (geometry_kluge) {
                scr->scr_cfg.oscr_width = cfg.owidth =
                    cfg.fbwidth - cfg.width;
                scr->scr_cfg.oscr_height = cfg.oheight =
                    cfg.fbheight - cfg.height;
        }

        /*
         * Save a few fields for sti_describe_screen() later
         */
        scr->fbheight = cfg.fbheight;
        scr->fbwidth = cfg.fbwidth;
        scr->oheight = cfg.oheight;
        scr->owidth = cfg.owidth;
        memcpy(scr->name, cfg.name, sizeof(scr->name));

        if (flags & STI_FBMODE) {
                /* we're done here */
                sti_init(scr, STI_FBMODE);
                return 0;
        }

        if ((error = sti_init(scr, STI_TEXTMODE | flags))) {
                aprint_error(": cannot initialize (%d)\n", error);
                goto fail;
        }
#ifdef STIDEBUG
        snprintb(buf, sizeof(buf), STI_INQCONF_BITS, cfg.attributes);
        DPRINTF(("conf: bpp=%d planes=%d attr=%s\n"
            "crt=0x%x:0x%x:0x%x hw=0x%x:0x%x:0x%x\n", cfg.bpp,
            cfg.planes, buf,
            ecfg.crt_config[0], ecfg.crt_config[1], ecfg.crt_config[2],
            ecfg.crt_hw[0], ecfg.crt_hw[1], ecfg.crt_hw[2]));
#endif
        scr->scr_bpp = cfg.bppu;

        /*
         * Although scr->scr_ecfg.current_monitor is not filled by
         * sti_init() as expected, we can nevertheless walk the monitor
         * list, if there is any, and if we find a mode matching our
         * resolution, pick its font index.
         */
        if (dd->dd_montbl != 0) {
                STI_ENABLE_ROM(rom->rom_softc);

                for (i = 0; i < dd->dd_nmon; i++) {
                        u_int offs = dd->dd_montbl + 8 * i;
                        uint32_t m[2];
                        sti_mon_t mon = (void *)m;
                        if (rom->rom_devtype == STI_DEVTYPE1) {
                                m[0] = parseword(4 * offs);
                                m[1] = parseword(4 * (offs + 4));
                        } else {
                                bus_space_read_region_stream_4(memt, romh, offs,
                                    (uint32_t *)mon, sizeof(*mon) / 4);
                        }

                        if (mon->width == scr->scr_cfg.scr_width &&
                            mon->height == scr->scr_cfg.scr_height) {
                                fontindex = mon->font;
                                break;
                        }
                }

                STI_DISABLE_ROM(rom->rom_softc);

                DPRINTF(("font index: %d\n", fontindex));
        }

        if ((error = sti_fetchfonts(scr, &cfg, dd->dd_fntaddr, fontindex))) {
                aprint_error(": cannot fetch fonts (%d)\n", error);
                goto fail;
        }

        /*
         * setup screen descriptions:
         *      figure number of fonts supported;
         *      allocate wscons structures;
         *      calculate dimensions.
         */

        scr->scr_wsd.name = "std";
        scr->scr_wsd.ncols = cfg.width / scr->scr_curfont.width;
        scr->scr_wsd.nrows = cfg.height / scr->scr_curfont.height;
        scr->scr_wsd.textops = &sti_emulops;
        scr->scr_wsd.fontwidth = scr->scr_curfont.width;
        scr->scr_wsd.fontheight = scr->scr_curfont.height;
        scr->scr_wsd.capabilities = WSSCREEN_REVERSE;

        scr->scr_scrlist[0] = &scr->scr_wsd;
        scr->scr_screenlist.nscreens = 1;
        scr->scr_screenlist.screens = scr->scr_scrlist;

#ifndef SMALL_KERNEL
        /*
         * Decide which board-specific routines to use.
         */

        switch (dd->dd_grid[0]) {
        case STI_DD_CRX:
                scr->setupfb = ngle_elk_setupfb;
                scr->putcmap = ngle_putcmap;

                scr->reg10_value = 0x13601000;
                if (scr->scr_bpp > 8)
                        scr->reg12_value = NGLE_BUFF1_CMAP3;
                else
                        scr->reg12_value = NGLE_BUFF1_CMAP0;
                scr->cmap_finish_register = NGLE_REG_1;
                break;

        case STI_DD_TIMBER:
                scr->setupfb = ngle_timber_setupfb;
                scr->putcmap = ngle_putcmap;

                scr->reg10_value = 0x13602000;
                scr->reg12_value = NGLE_BUFF1_CMAP0;
                scr->cmap_finish_register = NGLE_REG_1;
                break;

        case STI_DD_ARTIST:
                scr->setupfb = ngle_artist_setupfb;
                scr->putcmap = ngle_putcmap;

                scr->reg10_value = 0x13601000;
                scr->reg12_value = NGLE_ARTIST_CMAP0;
                scr->cmap_finish_register = NGLE_REG_26;
                break;

        case STI_DD_EG:
                scr->setupfb = ngle_artist_setupfb;
                scr->putcmap = ngle_putcmap;

                scr->reg10_value = 0x13601000;
                if (scr->scr_bpp > 8) {
                        scr->reg12_value = NGLE_BUFF1_CMAP3;
                        scr->cmap_finish_register = NGLE_REG_1;
                } else {
                        scr->reg12_value = NGLE_ARTIST_CMAP0;
                        scr->cmap_finish_register = NGLE_REG_26;
                }
                break;

        case STI_DD_HCRX:
                scr->setupfb = ngle_elk_setupfb;
                scr->putcmap = ngle_hcrx_putcmap;

                if (scr->scr_bpp > 8) {
                        scr->reg12_value = NGLE_BUFF1_CMAP3;
                        scr->reg10_value = 0xBBA0A000;
                } else {
                        scr->reg12_value = NGLE_BUFF1_CMAP0;
                        scr->reg10_value = 0x13602000;
                }
                scr->cmap_finish_register = NGLE_REG_38;
                break;

        case STI_DD_SUMMIT:
        case STI_DD_LEGO:
                scr->setupfb = summit_setupfb;
                scr->putcmap = summit_putcmap;
                scr->scr_bpp = 8;       /* for now */
                break;

        case STI_DD_EVRX:
        case STI_DD_382C:
        case STI_DD_3X2V:
                /*
                 * EVRX, 382C, and 3X2V are available only on hp300 models
                 * and board specific routines are handled by MD
                 * sti_machdep_attach() in arch/hp300/dev/sti_machdep.c.
                 */
                break;

        case STI_DD_GRX:
        case STI_DD_CRX24:
        case STI_DD_DUAL_CRX:
        case STI_DD_PINNACLE:
        default:
                scr->setupfb = NULL;
                scr->putcmap =
                    rom->scment == NULL ? NULL : ngle_default_putcmap;
                break;
        }
#endif

        return 0;

fail:
        /* XXX free resources */
        if (scr->scr_ecfg.addr != NULL) {
                free(scr->scr_ecfg.addr, M_DEVBUF);
                scr->scr_ecfg.addr = NULL;
        }

        return ENXIO;
}

void
sti_describe_screen(struct sti_softc *sc, struct sti_screen *scr)
{
        struct sti_font *fp = &scr->scr_curfont;

        aprint_normal("%s: %s, %dx%d frame buffer, %dx%dx%d display\n",
            device_xname(sc->sc_dev), scr->name, scr->fbwidth, scr->fbheight,
            scr->scr_cfg.scr_width, scr->scr_cfg.scr_height, scr->scr_bpp);

        aprint_normal("%s: %dx%d font type %d, %d bpc, charset %d-%d\n",
            device_xname(sc->sc_dev), fp->width, fp->height,
            fp->type, fp->bpc, fp->first, fp->last);
}

void
sti_describe(struct sti_softc *sc)
{
        struct sti_rom *rom = sc->sc_rom;
        struct sti_dd *dd = &rom->rom_dd;

        aprint_normal(": rev %d.%02d;%d, ID 0x%08X%08X\n",
            dd->dd_grrev >> 4, dd->dd_grrev & 0xf,
            dd->dd_lrrev, dd->dd_grid[0], dd->dd_grid[1]);

        if (sc->sc_scr != NULL)
                sti_describe_screen(sc, sc->sc_scr);
}

/*
 * Final part of attachment. On hppa where we use the PDC console
 * during autoconf, this has to be postponed until autoconf has
 * completed.
 */
void
sti_end_attach(struct sti_softc *sc)
{
        struct sti_screen *scr = sc->sc_scr;

        if (scr == NULL)
                return;
#if NWSDISPLAY > 0
        else {
                struct wsemuldisplaydev_attach_args waa;
                scr->scr_wsmode = WSDISPLAYIO_MODE_EMUL;

                waa.console = sc->sc_flags & STI_CONSOLE ? 1 : 0;
                waa.scrdata = &scr->scr_screenlist;
                waa.accessops = &sti_accessops;
                waa.accesscookie = scr;

                /* attach as console if required */
                if (waa.console && !ISSET(sc->sc_flags, STI_ATTACHED)) {
                        long defattr;

                        sti_alloc_attr(scr, 0, 0, 0, &defattr);
                        wsdisplay_cnattach(&scr->scr_wsd, scr,
                            0, scr->scr_wsd.nrows - 1, defattr);
                        sc->sc_flags |= STI_ATTACHED;
                }

                config_found(sc->sc_dev, &waa, wsemuldisplaydevprint,
                    CFARGS_NONE);
        }
#endif
}

u_int
sti_rom_size(bus_space_tag_t memt, bus_space_handle_t romh)
{
        int devtype;
        u_int romend;

        devtype = bus_space_read_1(memt, romh, 3);
        if (devtype == STI_DEVTYPE4) {
                bus_space_read_region_stream_4(memt, romh, STI_DEV4_DD_ROMEND,
                    (uint32_t *)&romend, 1);
        } else {
                romend = parseword(STI_DEV1_DD_ROMEND);
        }

        DPRINTF(("%s: %08x (%08x)\n", __func__, romend, round_page(romend)));

        return round_page(romend);
}

int
sti_fetchfonts(struct sti_screen *scr, struct sti_inqconfout *cfg,
    uint32_t baseaddr, u_int fontindex)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t romh = rom->romh;
        struct sti_font *fp = &scr->scr_curfont;
        uint32_t addr;
        int size;
#ifdef notyet
        int uc;
        struct {
                struct sti_unpmvflags flags;
                struct sti_unpmvin in;
                struct sti_unpmvout out;
        } a;
#endif

        /*
         * Get the first PROM font in memory
         */

        STI_ENABLE_ROM(rom->rom_softc);

rescan:
        addr = baseaddr;
        do {
                if (rom->rom_devtype == STI_DEVTYPE1) {
                        fp->first  = parseshort(addr + 0x00);
                        fp->last   = parseshort(addr + 0x08);
                        fp->width  = bus_space_read_1(memt, romh, addr + 0x13);
                        fp->height = bus_space_read_1(memt, romh, addr + 0x17);
                        fp->type   = bus_space_read_1(memt, romh, addr + 0x1b);
                        fp->bpc    = bus_space_read_1(memt, romh, addr + 0x1f);
                        fp->next   = parseword(addr + 0x20);
                        fp->uheight= bus_space_read_1(memt, romh, addr + 0x33);
                        fp->uoffset= bus_space_read_1(memt, romh, addr + 0x37);
                } else {        /* STI_DEVTYPE4 */
                        bus_space_read_region_stream_4(memt, romh, addr,
                            (uint32_t *)fp, sizeof(struct sti_font) / 4);
                }

#ifdef STIDEBUG
                STI_DISABLE_ROM(rom->rom_softc);
                DPRINTF(("%s: %dx%d font type %d, %d bpc, charset %d-%d\n",
                    scr->scr_rom->rom_softc == NULL ? __func__ :
                    device_xname(scr->scr_rom->rom_softc->sc_dev), fp->width,
                    fp->height, fp->type, fp->bpc, fp->first, fp->last));
                STI_ENABLE_ROM(rom->rom_softc);
#endif

                if (fontindex == 0) {
                        size = sizeof(struct sti_font) +
                            (fp->last - fp->first + 1) * fp->bpc;
                        if (rom->rom_devtype == STI_DEVTYPE1)
                                size *= 4;
                        scr->scr_romfont = malloc(size, M_DEVBUF, M_WAITOK);

                        bus_space_read_region_stream_4(memt, romh, addr,
                            (uint32_t *)scr->scr_romfont, size / 4);
                        break;
                }

                addr = baseaddr + fp->next;
                fontindex--;
        } while (fp->next != 0);

        /*
         * If our font index was bogus, we did not find the expected font.
         * In this case, pick the first one and be done with it.
         */
        if (fp->next == 0 && scr->scr_romfont == NULL) {
                fontindex = 0;
                goto rescan;
        }

        STI_DISABLE_ROM(rom->rom_softc);

#ifdef notyet
        /*
         * If there is enough room in the off-screen framebuffer memory,
         * display all the characters there in order to display them
         * faster with blkmv operations rather than unpmv later on.
         */
        if (size <= cfg->fbheight *
            (cfg->fbwidth - cfg->width - cfg->owidth)) {
                memset(&a, 0, sizeof(a));
                a.flags.flags = STI_UNPMVF_WAIT;
                a.in.fg_colour = STI_COLOUR_WHITE;
                a.in.bg_colour = STI_COLOUR_BLACK;
                a.in.font_addr = scr->scr_romfont;

                scr->scr_fontmaxcol = cfg->fbheight / fp->height;
                scr->scr_fontbase = cfg->width + cfg->owidth;
                for (uc = fp->first; uc <= fp->last; uc++) {
                        a.in.x = ((uc - fp->first) / scr->scr_fontmaxcol) *
                            fp->width + scr->scr_fontbase;
                        a.in.y = ((uc - fp->first) % scr->scr_fontmaxcol) *
                            fp->height;
                        a.in.index = uc;

                        (*scr->unpmv)(&a.flags, &a.in, &a.out, &scr->scr_cfg);
                        if (a.out.errno) {
                                aprint_error_dev(sc->sc_dev, "unpmv %d "
                                    "returned %d\n", uc, a.out.errno);
                                return 0;
                        }
                }

                free(scr->scr_romfont, M_DEVBUF);
                scr->scr_romfont = NULL;
        }
#endif

        return 0;
}

/*
 * Wrappers around STI code pointers
 */

int
sti_init(struct sti_screen *scr, int mode)
{
        struct sti_rom *rom = scr->scr_rom;
        struct {
                struct sti_initflags flags;
                struct sti_initin in;
                struct sti_einitin ein;
                struct sti_initout out;
        } a;

        KASSERT(rom != NULL);
        memset(&a, 0, sizeof(a));

        a.flags.flags = STI_INITF_WAIT | STI_INITF_PBET | STI_INITF_PBETI;
        if ((mode & STI_TEXTMODE) != 0) {
                a.flags.flags |= STI_INITF_TEXT | STI_INITF_CMB |
                    STI_INITF_PBET | STI_INITF_PBETI | STI_INITF_ICMT;
                a.in.text_planes = 1;
        } else {
                a.flags.flags |= STI_INITF_TEXT | STI_INITF_NTEXT;
                /*
                 * Request as many text planes as STI will allow.
                 * The reason to do this - when switching to framebuffer mode
                 * for X we need access to all planes. In theory STI should do
                 * just that when we request access to both text and non-text
                 * planes as above.
                 * In reality though, at least on my PCI Visualize EG, some
                 * planes and/or colour registers remain inaccessible if we
                 * request only one text plane.
                 * Clearly we're missing a register write or two here, but so
                 * far I haven't found it.
                 */
                a.in.text_planes = 3;
        }
        if ((mode & STI_CLEARSCR) != 0)
                a.flags.flags |= STI_INITF_CLEAR;

        a.in.ext_in = &a.ein;

        DPRINTF(("%s: init,%p(%x, %p, %p, %p)\n",
            rom->rom_softc == NULL ? __func__ :
            device_xname(rom->rom_softc->sc_dev), rom->init, a.flags.flags,
            &a.in, &a.out, &scr->scr_cfg));

        (*rom->init)(&a.flags, &a.in, &a.out, &scr->scr_cfg);

        if (a.out.text_planes != a.in.text_planes)
                return -1;      /* not colliding with sti errno values */
        return a.out.errno;
}

int
sti_inqcfg(struct sti_screen *scr, struct sti_inqconfout *out)
{
        struct sti_rom *rom = scr->scr_rom;
        struct {
                struct sti_inqconfflags flags;
                struct sti_inqconfin in;
        } a;

        memset(&a, 0, sizeof(a));

        a.flags.flags = STI_INQCONFF_WAIT;
        (*rom->inqconf)(&a.flags, &a.in, out, &scr->scr_cfg);

        return out->errno;
}

void
sti_bmove(struct sti_screen *scr, int x1, int y1, int x2, int y2, int h, int w,
    enum sti_bmove_funcs f)
{
        struct sti_rom *rom = scr->scr_rom;
        struct {
                struct sti_blkmvflags flags;
                struct sti_blkmvin in;
                struct sti_blkmvout out;
        } a;

        memset(&a, 0, sizeof(a));

        a.flags.flags = STI_BLKMVF_WAIT;
        switch (f) {
        case bmf_clear:
                a.flags.flags |= STI_BLKMVF_CLR;
                a.in.bg_colour = STI_COLOUR_BLACK;
                break;
        case bmf_underline:
        case bmf_copy:
                a.in.fg_colour = STI_COLOUR_WHITE;
                a.in.bg_colour = STI_COLOUR_BLACK;
                break;
        case bmf_invert:
                a.flags.flags |= STI_BLKMVF_COLR;
                a.in.fg_colour = STI_COLOUR_BLACK;
                a.in.bg_colour = STI_COLOUR_WHITE;
                break;
        }
        a.in.srcx = x1;
        a.in.srcy = y1;
        a.in.dstx = x2;
        a.in.dsty = y2;
        a.in.height = h;
        a.in.width = w;

        (*rom->blkmv)(&a.flags, &a.in, &a.out, &scr->scr_cfg);
#ifdef STIDEBUG
        if (a.out.errno)
                printf("%s: blkmv returned %d\n",
                    rom->rom_softc == NULL ? __func__ :
                    device_xname(rom->rom_softc->sc_dev), a.out.errno);
#endif
}

int
sti_setcment(struct sti_screen *scr, u_int i, u_char r, u_char g, u_char b)
{
        struct sti_rom *rom = scr->scr_rom;
        struct {
                struct sti_scmentflags flags;
                struct sti_scmentin in;
                struct sti_scmentout out;
        } a;

        memset(&a, 0, sizeof(a));

        a.flags.flags = STI_SCMENTF_WAIT;
        a.in.entry = i;
        a.in.value = (r << 16) | (g << 8) | b;

        (*rom->scment)(&a.flags, &a.in, &a.out, &scr->scr_cfg);

        return a.out.errno;
}

/*
 * wsdisplay accessops
 */
int
sti_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_rom *rom = scr->scr_rom;
        struct wsdisplay_fbinfo *wdf;
        struct wsdisplay_cmap *cmapp;
        u_int mode, idx, count;
        int ret;

        ret = 0;
        switch (cmd) {
        case GCID:
                *(u_int *)data = rom->rom_dd.dd_grid[0];
                break;

        case WSDISPLAYIO_GMODE:
                *(u_int *)data = scr->scr_wsmode;
                break;

        case WSDISPLAYIO_SMODE:
                mode = *(u_int *)data;
                switch (mode) {
                case WSDISPLAYIO_MODE_EMUL:
                        if (scr->scr_wsmode != WSDISPLAYIO_MODE_EMUL)
                                ret = sti_init(scr, STI_TEXTMODE);
                        break;
                case WSDISPLAYIO_MODE_DUMBFB:
                        if (scr->scr_wsmode != WSDISPLAYIO_MODE_DUMBFB) {
                                ret = sti_init(scr, 0);
                                if (scr->setupfb != NULL)
                                        scr->setupfb(scr);
                                else
#if 0
                                        ret = sti_init(scr, STI_FBMODE);
#else
                                        ret = EINVAL;
#endif
                        }
                        break;
                case WSDISPLAYIO_MODE_MAPPED:
                default:
                        ret = EINVAL;
                        break;
                }
                if (ret == 0)
                        scr->scr_wsmode = mode;
                break;

        case WSDISPLAYIO_GTYPE:
                *(u_int *)data = WSDISPLAY_TYPE_STI;
                break;

        case WSDISPLAYIO_GINFO:
                wdf = (struct wsdisplay_fbinfo *)data;
                wdf->height = scr->scr_cfg.scr_height;
                wdf->width  = scr->scr_cfg.scr_width;
                wdf->depth  = scr->scr_bpp;
                if (scr->putcmap == NULL || scr->scr_bpp > 8)
                        wdf->cmsize = 0;
                else
                        wdf->cmsize = STI_NCMAP;
                break;

        case WSDISPLAYIO_LINEBYTES:
                if (scr->scr_bpp > 8)
                        *(u_int *)data = scr->scr_cfg.fb_width * 4;
                else
                        *(u_int *)data = scr->scr_cfg.fb_width;
                break;

        case WSDISPLAYIO_GETCMAP:
                if (scr->putcmap == NULL || scr->scr_bpp > 8)
                        return ENODEV;
                cmapp = (struct wsdisplay_cmap *)data;
                idx = cmapp->index;
                count = cmapp->count;
                if (idx >= STI_NCMAP || count > STI_NCMAP - idx)
                        return EINVAL;
                if ((ret = copyout(&scr->scr_rcmap[idx], cmapp->red, count)))
                        break;
                if ((ret = copyout(&scr->scr_gcmap[idx], cmapp->green, count)))
                        break;
                if ((ret = copyout(&scr->scr_bcmap[idx], cmapp->blue, count)))
                        break;
                break;

        case WSDISPLAYIO_PUTCMAP:
                if (scr->putcmap == NULL || scr->scr_bpp > 8)
                        return ENODEV;
                if (scr->scr_wsmode == WSDISPLAYIO_MODE_EMUL) {
                        /*
                         * The hardware palette settings are handled by
                         * the STI ROM in STI_TEXTMODE and changing cmap
                         * could cause mangled text colors at least on CRX.
                         * Updating CMAP in EMUL mode isn't expected anyway
                         * so just ignore it.
                         */
                        return 0;
                }
                cmapp = (struct wsdisplay_cmap *)data;
                idx = cmapp->index;
                count = cmapp->count;
                if (idx >= STI_NCMAP || count > STI_NCMAP - idx)
                        return EINVAL;
                if ((ret = copyin(cmapp->red, &scr->scr_rcmap[idx], count)))
                        break;
                if ((ret = copyin(cmapp->green, &scr->scr_gcmap[idx], count)))
                        break;
                if ((ret = copyin(cmapp->blue, &scr->scr_bcmap[idx], count)))
                        break;
                ret = scr->putcmap(scr, idx, count);
                break;

        case WSDISPLAYIO_SVIDEO:
        case WSDISPLAYIO_GVIDEO:
        case WSDISPLAYIO_GCURPOS:
        case WSDISPLAYIO_SCURPOS:
        case WSDISPLAYIO_GCURMAX:
        case WSDISPLAYIO_GCURSOR:
        case WSDISPLAYIO_SCURSOR:
        default:
                return ENOTTY;  /* not supported yet */
        }

        return ret;
}

paddr_t
sti_mmap(void *v, void *vs, off_t offset, int prot)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_rom *rom = scr->scr_rom;
        paddr_t pa;

        if ((offset & PAGE_MASK) != 0)
                return -1;

        if (offset < 0 || offset >= scr->fblen)
                return -1;

        if (scr->scr_wsmode != WSDISPLAYIO_MODE_DUMBFB)
                return -1;

        pa = bus_space_mmap(rom->memt, scr->fbaddr, offset, prot,
            BUS_SPACE_MAP_LINEAR);

        if (pa == -1)
                pa = scr->fbaddr + offset;

        return pa;
}

int
sti_alloc_screen(void *v, const struct wsscreen_descr *type, void **cookiep,
    int *cxp, int *cyp, long *defattr)
{
        struct sti_screen *scr = (struct sti_screen *)v;

        if (scr->scr_nscreens > 0)
                return ENOMEM;

        *cookiep = scr;
        *cxp = 0;
        *cyp = 0;
        sti_alloc_attr(scr, 0, 0, 0, defattr);
        scr->scr_nscreens++;
        return 0;
}

void
sti_free_screen(void *v, void *cookie)
{
        struct sti_screen *scr = (struct sti_screen *)v;

        scr->scr_nscreens--;
}

int
sti_show_screen(void *v, void *cookie, int waitok, void (*cb)(void *, int, int),
    void *cbarg)
{
#if 0
        struct sti_screen *scr = (struct sti_screen *)v;
#endif

        return 0;
}

int
sti_load_font(void *v, void *cookie, struct wsdisplay_font *font)
{
#if 0
        struct sti_screen *scr = (struct sti_screen *)v;
#endif

        return -1;
}

/*
 * wsdisplay emulops
 */
void
sti_cursor(void *v, int on, int row, int col)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_font *fp = &scr->scr_curfont;

        sti_bmove(scr,
            col * fp->width, row * fp->height,
            col * fp->width, row * fp->height,
            fp->height, fp->width, bmf_invert);
}

/*
 * ISO 8859-1 part of Unicode to HP Roman font index conversion array.
 */
const uint8_t
sti_unitoroman[0x100 - 0xa0] = {
        0xa0, 0xb8, 0xbf, 0xbb, 0xba, 0xbc,    0, 0xbd,
        0xab,    0, 0xf9, 0xfb,    0, 0xf6,    0, 0xb0,

        0xb3, 0xfe,    0,    0, 0xa8, 0xf3, 0xf4, 0xf2,
           0,    0, 0xfa, 0xfd, 0xf7, 0xf8,    0, 0xb9,

        0xa1, 0xe0, 0xa2, 0xe1, 0xd8, 0xd0, 0xd3, 0xb4,
        0xa3, 0xdc, 0xa4, 0xa5, 0xe6, 0xe5, 0xa6, 0xa7,

        0xe3, 0xb6, 0xe8, 0xe7, 0xdf, 0xe9, 0xda,    0,
        0xd2, 0xad, 0xed, 0xae, 0xdb, 0xb1, 0xf0, 0xde,

        0xc8, 0xc4, 0xc0, 0xe2, 0xcc, 0xd4, 0xd7, 0xb5,
        0xc9, 0xc5, 0xc1, 0xcd, 0xd9, 0xd5, 0xd1, 0xdd,

        0xe4, 0xb7, 0xca, 0xc6, 0xc2, 0xea, 0xce,    0,
        0xd6, 0xcb, 0xc7, 0xc3, 0xcf, 0xb2, 0xf1, 0xef
};

int
sti_mapchar(void *v, int uni, u_int *index)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_font *fp = &scr->scr_curfont;
        int c;

        switch (fp->type) {
        case STI_FONT_HPROMAN8:
                if (uni >= 0x80 && uni < 0xa0)
                        c = -1;
                else if (uni >= 0xa0 && uni < 0x100) {
                        c = (int)sti_unitoroman[uni - 0xa0];
                        if (c == 0)
                                c = -1;
                } else
                        c = uni;
                break;
        default:
                c = uni;
                break;
        }

        if (c == -1 || c < fp->first || c > fp->last) {
                *index = ' ';
                return 0;
        }

        *index = c;
        return 5;
}

void
sti_putchar(void *v, int row, int col, u_int uc, long attr)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_rom *rom = scr->scr_rom;
        struct sti_font *fp = &scr->scr_curfont;
        int bg, fg;

        fg = WSATTR_UNPACK_FG(attr);
        bg = WSATTR_UNPACK_BG(attr);

        if (scr->scr_romfont != NULL) {
                /*
                 * Font is in memory, use unpmv
                 */
                struct {
                        struct sti_unpmvflags flags;
                        struct sti_unpmvin in;
                        struct sti_unpmvout out;
                } a;

                memset(&a, 0, sizeof(a));

                a.flags.flags = STI_UNPMVF_WAIT;
                a.in.fg_colour = fg;
                a.in.bg_colour = bg;
                a.in.x = col * fp->width;
                a.in.y = row * fp->height;
                a.in.font_addr = scr->scr_romfont;
                a.in.index = uc;

                (*rom->unpmv)(&a.flags, &a.in, &a.out, &scr->scr_cfg);
        } else {
                /*
                 * Font is in frame buffer, use blkmv
                 */
                struct {
                        struct sti_blkmvflags flags;
                        struct sti_blkmvin in;
                        struct sti_blkmvout out;
                } a;

                memset(&a, 0, sizeof(a));

                a.flags.flags = STI_BLKMVF_WAIT;
                a.in.fg_colour = fg;
                a.in.bg_colour = bg;

                a.in.srcx = ((uc - fp->first) / scr->scr_fontmaxcol) *
                    fp->width + scr->scr_fontbase;
                a.in.srcy = ((uc - fp->first) % scr->scr_fontmaxcol) *
                    fp->height;
                a.in.dstx = col * fp->width;
                a.in.dsty = row * fp->height;
                a.in.height = fp->height;
                a.in.width = fp->width;

                (*rom->blkmv)(&a.flags, &a.in, &a.out, &scr->scr_cfg);
        }
}

void
sti_copycols(void *v, int row, int srccol, int dstcol, int ncols)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_font *fp = &scr->scr_curfont;

        sti_bmove(scr,
            srccol * fp->width, row * fp->height,
            dstcol * fp->width, row * fp->height,
            fp->height, ncols * fp->width, bmf_copy);
}

void
sti_erasecols(void *v, int row, int startcol, int ncols, long attr)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_font *fp = &scr->scr_curfont;

        sti_bmove(scr,
            startcol * fp->width, row * fp->height,
            startcol * fp->width, row * fp->height,
            fp->height, ncols * fp->width, bmf_clear);
}

void
sti_copyrows(void *v, int srcrow, int dstrow, int nrows)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_font *fp = &scr->scr_curfont;

        sti_bmove(scr, 0, srcrow * fp->height, 0, dstrow * fp->height,
            nrows * fp->height, scr->scr_cfg.scr_width, bmf_copy);
}

void
sti_eraserows(void *v, int srcrow, int nrows, long attr)
{
        struct sti_screen *scr = (struct sti_screen *)v;
        struct sti_font *fp = &scr->scr_curfont;

        sti_bmove(scr, 0, srcrow * fp->height, 0, srcrow * fp->height,
            nrows * fp->height, scr->scr_cfg.scr_width, bmf_clear);
}

int
sti_alloc_attr(void *v, int fg, int bg, int flags, long *pattr)
{
#if 0
        struct sti_screen *scr = (struct sti_screen *)v;
#endif

        if ((flags & (WSATTR_HILIT | WSATTR_BLINK |
            WSATTR_UNDERLINE | WSATTR_WSCOLORS)) != 0)
                return EINVAL;
        if ((flags & WSATTR_REVERSE) != 0) {
                fg = STI_COLOUR_BLACK;
                bg = STI_COLOUR_WHITE;
        } else {
                fg = STI_COLOUR_WHITE;
                bg = STI_COLOUR_BLACK;
        }

        *pattr = WSATTR_PACK(fg, bg, flags);
        return 0;
}

/*
 * Early console support.  Only used on hp300, currently
 */
int
sti_cnattach(struct sti_rom *rom, struct sti_screen *scr, bus_space_tag_t memt,
    bus_addr_t *bases, u_int codebase)
{
        bus_space_handle_t romh;
        u_int romend;
        int error;
        long defattr;

        if ((error = bus_space_map(memt, bases[0], PAGE_SIZE, 0, &romh)) != 0)
                return error;

        /*
         * Compute real PROM size
         */
        romend = sti_rom_size(memt, romh);

        bus_space_unmap(memt, romh, PAGE_SIZE);

        if ((error = bus_space_map(memt, bases[0], romend, 0, &romh)) != 0)
                return error;

        bases[0] = romh;
        if (sti_rom_setup(rom, memt, memt, romh, bases, codebase) != 0)
                return -1;
        scr->scr_rom = rom;
        if (sti_screen_setup(scr, STI_CLEARSCR) != 0)
                return -1;

        sti_alloc_attr(scr, 0, 0, 0, &defattr);
        wsdisplay_cnattach(&scr->scr_wsd, scr, 0, 0, defattr);

        return 0;
}

int
ngle_default_putcmap(struct sti_screen *scr, u_int idx, u_int count)
{
        int i, ret;

        for (i = idx + count - 1; i >= (int)idx; i--)
                if ((ret = sti_setcment(scr, i, scr->scr_rcmap[i],
                    scr->scr_gcmap[i], scr->scr_bcmap[i])))
                        return EINVAL;

        return 0;
}

#ifndef SMALL_KERNEL

void    ngle_setup_hw(bus_space_tag_t, bus_space_handle_t);
void    ngle_setup_fb(bus_space_tag_t, bus_space_handle_t, uint32_t);
void    ngle_setup_attr_planes(struct sti_screen *scr);
void    ngle_setup_bt458(struct sti_screen *scr);

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

void
ngle_artist_setupfb(struct sti_screen *scr)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[2];

        ngle_setup_bt458(scr);

        ngle_setup_hw(memt, memh);
        ngle_setup_fb(memt, memh, scr->reg10_value);

        ngle_setup_attr_planes(scr);

        ngle_setup_hw(memt, memh);
        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);
}

void
ngle_elk_setupfb(struct sti_screen *scr)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[2];

        ngle_setup_bt458(scr);

        ngle_setup_hw(memt, memh);
        ngle_setup_fb(memt, memh, scr->reg10_value);

        ngle_setup_attr_planes(scr);

        ngle_setup_hw(memt, memh);
        /* enable overlay planes in Bt458 command register */
        ngle_bt458_write(memt, memh, 0x0c, 0x06);
        ngle_bt458_write(memt, memh, 0x0e, 0x43);
}

void
ngle_timber_setupfb(struct sti_screen *scr)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[2];

        ngle_setup_bt458(scr);

        ngle_setup_hw(memt, memh);
        /* enable overlay planes in Bt458 command register */
        ngle_bt458_write(memt, memh, 0x0c, 0x06);
        ngle_bt458_write(memt, memh, 0x0e, 0x43);
}

static void
summit_wait(struct sti_screen *scr)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[0];

        while (bus_space_read_stream_4(memt, memh, VISFX_STATUS) != 0)
                continue;
}

void
summit_setupfb(struct sti_screen *scr)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[0];

        summit_wait(scr);
        bus_space_write_stream_4(memt, memh, 0xb08044, 0x1b);
        bus_space_write_stream_4(memt, memh, 0xb08048, 0x1b);
        bus_space_write_stream_4(memt, memh, 0x920860, 0xe4);
        bus_space_write_stream_4(memt, memh, 0xa00818, 0);
        bus_space_write_stream_4(memt, memh, 0xa00404, 0);
        bus_space_write_stream_4(memt, memh, 0x921110, 0);
        bus_space_write_stream_4(memt, memh, 0x9211d8, 0);
        bus_space_write_stream_4(memt, memh, 0xa0086c, 0);
        bus_space_write_stream_4(memt, memh, 0x921114, 0);
        bus_space_write_stream_4(memt, memh, 0xac1050, 0);

        bus_space_write_stream_4(memt, memh, VISFX_APERTURE_ACCESS,
            VISFX_DEPTH_8);

        bus_space_write_stream_4(memt, memh, VISFX_PIXEL_MASK, 0xffffffff);
        bus_space_write_stream_4(memt, memh, VISFX_PLANE_MASK, 0xffffffff);
        bus_space_write_stream_4(memt, memh, VISFX_VRAM_WRITE_MODE,
            VISFX_WRITE_MODE_PLAIN);
        bus_space_write_stream_4(memt, memh, VISFX_VRAM_READ_MODE,
            VISFX_READ_MODE_COPY);
}

void
ngle_setup_bt458(struct sti_screen *scr)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[2];

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

void
ngle_setup_attr_planes(struct sti_screen *scr)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[2];

        ngle_setup_hw(memt, memh);
        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, scr->reg12_value);
        bus_space_write_stream_4(memt, memh, NGLE_REG_8, 0xffffffff);

        bus_space_write_stream_4(memt, memh, NGLE_REG_6, 0x00000000);
        bus_space_write_stream_4(memt, memh, NGLE_REG_9,
            (scr->scr_cfg.scr_width << 16) | 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);

        ngle_setup_hw(memt, memh);
        bus_space_write_stream_4(memt, memh, NGLE_REG_12, 0x00000000);

        ngle_setup_fb(memt, memh, scr->reg10_value);
}

int
ngle_putcmap(struct sti_screen *scr, u_int idx, u_int count)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[2];
        uint8_t *r, *g, *b;
        uint32_t cmap_finish;

        if (scr->scr_bpp > 8)
                cmap_finish = 0x83000100;
        else
                cmap_finish = 0x80000100;

        r = scr->scr_rcmap + idx;
        g = scr->scr_gcmap + idx;
        b = scr->scr_bcmap + idx;

        ngle_setup_hw(memt, memh);
        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);

        while (count-- != 0) {
                ngle_setup_hw(memt, memh);
                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);

                idx++;
                r++, g++, b++;
        }


        bus_space_write_stream_4(memt, memh, NGLE_REG_2, 0x400);
        bus_space_write_stream_4(memt, memh, scr->cmap_finish_register,
            cmap_finish);
        ngle_setup_fb(memt, memh, scr->reg10_value);


        return 0;
}

int
ngle_hcrx_putcmap(struct sti_screen *scr, u_int idx, u_int count)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[2];
        uint8_t *r, *g, *b;
        uint32_t cmap_finish;

        if (scr->scr_bpp > 8)
                cmap_finish = 0x80000100;
        else
                cmap_finish = 0x82000100;

        r = scr->scr_rcmap + idx;
        g = scr->scr_gcmap + idx;
        b = scr->scr_bcmap + idx;

        ngle_setup_hw(memt, memh);
        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);

        while (count-- != 0) {
                ngle_setup_hw(memt, memh);
                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);

                idx++;
                r++, g++, b++;
        }


        bus_space_write_stream_4(memt, memh, NGLE_REG_2, 0x400);
        bus_space_write_stream_4(memt, memh, NGLE_REG_38, cmap_finish);
        ngle_setup_fb(memt, memh, scr->reg10_value);


        return 0;
}

int
summit_putcmap(struct sti_screen *scr, u_int idx, u_int count)
{
        struct sti_rom *rom = scr->scr_rom;
        bus_space_tag_t memt = rom->memt;
        bus_space_handle_t memh = rom->regh[0];
        uint8_t *r, *g, *b;

        r = scr->scr_rcmap + idx;
        g = scr->scr_gcmap + idx;
        b = scr->scr_bcmap + idx;

        if (rom->rom_dd.dd_grid[0] == STI_DD_LEGO) {
                bus_space_write_stream_4(memt, memh, VISFX_COLOR_INDEX, idx);
        } else
                bus_space_write_stream_4(memt, memh, VISFX_COLOR_INDEX,
                     0xc0005100 + idx);

        while (count-- != 0) {
                bus_space_write_stream_4(memt, memh,
                     VISFX_COLOR_VALUE, (*r << 16) | (*g << 8) | *b);
                r++, g++, b++;
        }
        bus_space_write_stream_4(memt, memh, VISFX_COLOR_MASK, 0xff);
        bus_space_write_stream_4(memt, memh, 0x80004c, 0xc);
        bus_space_write_stream_4(memt, memh, 0x800000, 0);

        return 0;
}

void
ngle_setup_hw(bus_space_tag_t memt, bus_space_handle_t memh)
{
        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);
}

void
ngle_setup_fb(bus_space_tag_t memt, bus_space_handle_t memh, uint32_t reg10)
{

        ngle_setup_hw(memt, memh);
        bus_space_write_stream_4(memt, memh, NGLE_REG_10, reg10);
        bus_space_write_stream_4(memt, memh, NGLE_REG_14, 0x83000300);
        ngle_setup_hw(memt, memh);
        bus_space_write_1(memt, memh, NGLE_REG_16b1, 1);
}
#endif  /* SMALL_KERNEL */