root/sys/arch/hpcmips/dev/ite8181.c 
/*      $NetBSD: ite8181.c,v 1.31 2022/05/28 10:36:22 andvar Exp $      */

/*-
 * Copyright (c) 2000,2001 SATO Kazumi
 * 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 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 AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ite8181.c,v 1.31 2022/05/28 10:36:22 andvar Exp $");

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/boot_flag.h>
#include <sys/buf.h>

#include <uvm/uvm_extern.h>

#include <dev/wscons/wsconsio.h>

#include <machine/bootinfo.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/config_hook.h>
#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <hpcmips/dev/ite8181reg.h>
#include <hpcmips/dev/ite8181var.h>
#include "bivideo.h"
#if NBIVIDEO > 0
#include <dev/hpc/bivideovar.h>
#endif
#include <dev/hpc/hpccmapvar.h>

#define ITE8181DEBUG
#ifdef ITE8181DEBUG
#ifndef ITE8181DEBUG_CONF
#define ITE8181DEBUG_CONF 0
#endif
int     ite8181_debug = ITE8181DEBUG_CONF;
#define DPRINTF(arg)     if (ite8181_debug) printf arg
#define DPRINTFN(n, arg) if (ite8181_debug > (n)) printf arg
#define VPRINTF(arg)     if (bootverbose || ite8181_debug) printf arg
#define VPRINTFN(n, arg) if (bootverbose || ite8181_debug > (n)) printf arg
#else
#define DPRINTF(arg)
#define DPRINTFN(n, arg)
#define VPRINTF(arg)     if (bootverbose) printf arg
#define VPRINTFN(n, arg) if (bootverbose) printf arg
#endif

#ifndef ITE8181_LCD_CONTROL_ENABLE
int ite8181_lcd_control_disable = 1;
#else /* ITE8181_LCD_CONTROL_ENABLE */
int ite8181_lcd_control_disable = 0;
#endif /* ITE8181_LCD_CONTROL_ENABLE */

#define ITE8181_WINCE_CMAP

/*
 * XXX:
 * IBM WorkPad z50 power unit has too weak power.
 * So we must wait too many times to access some device
 * after LCD panel and BackLight on.
 * Currently delay is not enough ??? FIXME
 */
#ifndef ITE8181_LCD_ON_SELF_DELAY
#define ITE8181_LCD_ON_SELF_DELAY 1000
#endif /* ITE8181_LCD_ON__SELF_DELAY */
#ifndef ITE8181_LCD_ON_DELAY
#define ITE8181_LCD_ON_DELAY 2000
#endif /* ITE8181_LCD_ON_DELAY */
int ite8181_lcd_on_self_delay = ITE8181_LCD_ON_SELF_DELAY; /* msec */
int ite8181_lcd_on_delay = ITE8181_LCD_ON_DELAY; /* msec */

#define MSEC    1000
/*
 * function prototypes
 */
static void     ite8181_config_write_4(bus_space_tag_t, bus_space_handle_t,
                    int, int);
static int      ite8181_config_read_4(bus_space_tag_t, bus_space_handle_t,
                    int);
static void     ite8181_gui_write_4(struct ite8181_softc *, int, int);
static int      ite8181_gui_read_4(struct ite8181_softc *, int);

static void     ite8181_gui_write_1(struct ite8181_softc *, int, int);
static int      ite8181_gui_read_1(struct ite8181_softc *, int);

static void     ite8181_graphics_write_1(struct ite8181_softc *, int, int);
static int      ite8181_graphics_read_1(struct ite8181_softc *, int);

static void     ite8181_ema_write_1(struct ite8181_softc *, int, int);
static int      ite8181_ema_read_1(struct ite8181_softc *, int);

static void     ite8181_power(int, void *);
static int      ite8181_hardpower(void *, int, long, void *);
static int      ite8181_fbinit(struct hpcfb_fbconf *);
static int      ite8181_ioctl(void *, u_long, void *, int, struct lwp *);
static paddr_t  ite8181_mmap(void *, off_t offset, int);
static void     ite8181_erase_cursor(struct ite8181_softc *);
static int      ite8181_lcd_power(struct ite8181_softc *, int);

static void     ite8181_update_powerstate(struct ite8181_softc *, int);
void    ite8181_init_backlight(struct ite8181_softc *, int);
void    ite8181_init_brightness(struct ite8181_softc *, int);
void    ite8181_init_contrast(struct ite8181_softc *, int);
void    ite8181_set_brightness(struct ite8181_softc *, int);
void    ite8181_set_contrast(struct ite8181_softc *, int);

/*
 * static variables
 */
struct hpcfb_accessops ite8181_ha = {
        ite8181_ioctl, ite8181_mmap
};

inline int
ite8181_config_read_4(bus_space_tag_t iot, bus_space_handle_t ioh,
    int byteoffset)
{

        return (bus_space_read_4(iot, ioh, ITE8181_CONF_OFFSET + byteoffset));
}

inline void
ite8181_config_write_4(bus_space_tag_t iot, bus_space_handle_t ioh,
    int byteoffset, int data)
{

        bus_space_write_4(iot, ioh, ITE8181_CONF_OFFSET + byteoffset, data);
}

inline int
ite8181_gui_read_4(struct ite8181_softc *sc, int byteoffset)
{

        return (bus_space_read_4(sc->sc_iot, sc->sc_ioh,
            sc->sc_gba + byteoffset));
}

inline void
ite8181_gui_write_4(struct ite8181_softc *sc, int byteoffset, int data)
{

        bus_space_write_4(sc->sc_iot, sc->sc_ioh, sc->sc_gba + byteoffset,
            data);
}

inline int
ite8181_gui_read_1(struct ite8181_softc *sc, int byteoffset)
{

        return (bus_space_read_1(sc->sc_iot, sc->sc_ioh,
            sc->sc_gba + byteoffset));
}

inline void
ite8181_gui_write_1(struct ite8181_softc *sc, int byteoffset, int data)
{

        bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->sc_gba + byteoffset,
            data);
}

inline int
ite8181_graphics_read_1(struct ite8181_softc *sc, int byteoffset)
{

        return (bus_space_read_1(sc->sc_iot, sc->sc_ioh,
            sc->sc_sba + byteoffset));
}

inline void
ite8181_graphics_write_1(struct ite8181_softc *sc, int byteoffset, int data)
{

        bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->sc_sba + byteoffset,
            data);
}

inline int
ite8181_ema_read_1(struct ite8181_softc *sc, int byteoffset)
{

        ite8181_graphics_write_1(sc, ITE8181_EMA_EXAX, byteoffset);
        return (ite8181_graphics_read_1(sc, ITE8181_EMA_EXADATA));
}

inline void
ite8181_ema_write_1(struct ite8181_softc *sc, int byteoffset, int data)
{

        ite8181_graphics_write_1(sc, ITE8181_EMA_EXAX, byteoffset);
        ite8181_graphics_write_1(sc, ITE8181_EMA_EXADATA, data);
}

int
ite8181_probe(bus_space_tag_t iot, bus_space_handle_t ioh)
{
        unsigned long regval;

#if NBIVIDEO > 0
        if (bivideo_dont_attach)  /* some video driver already attached */
                return (0);
#endif /* NBIVIDEO > 0 */

        regval = ite8181_config_read_4(iot, ioh, ITE8181_ID);
        VPRINTF(("ite8181_probe: vendor id=%04lx product id=%04lx\n",
            regval & 0xffff, (regval >> 16) & 0xffff));
        if (regval != ((ITE8181_PRODUCT_ID << 16) | ITE8181_VENDER_ID))
                return (0);

        return (1);
}

void
ite8181_attach(struct ite8181_softc *sc)
{
        unsigned long regval;
        struct hpcfb_attach_args ha;
        int console = (bootinfo->bi_cnuse & BI_CNUSE_SERIAL) ? 0 : 1;

        printf(": ");
        if (ite8181_fbinit(&sc->sc_fbconf) != 0) {
                /* just return so that hpcfb will not be attached */
                return;
        }

        regval = ite8181_config_read_4(sc->sc_iot, sc->sc_ioh, ITE8181_CLASS);
        printf("ITE8181 Rev.%02lx", regval & ITE8181_REV_MASK);
        if (console) {
                printf(", console");
        }
        printf("\n");
        printf("%s: framebuffer address: 0x%08lx\n",
            device_xname(sc->sc_dev), (u_long)bootinfo->fb_addr);
        if (ite8181_lcd_control_disable)
                printf("%s: ite8181 lcd control is DISABLED.\n",
                    device_xname(sc->sc_dev));

        /* set base offsets */
        sc->sc_mba = ite8181_config_read_4(sc->sc_iot, sc->sc_ioh, ITE8181_MBA);
        DPRINTFN(1, ("ite8181: Memory base offset %08x\n", sc->sc_mba));
        sc->sc_gba = ite8181_config_read_4(sc->sc_iot, sc->sc_ioh, ITE8181_GBA);
        DPRINTFN(1, ("ite8181: GUI base offset %08x\n", sc->sc_gba));
        sc->sc_sba = ite8181_config_read_4(sc->sc_iot, sc->sc_ioh, ITE8181_SBA);
        DPRINTFN(1, ("ite8181: Graphics base offset %08x\n", sc->sc_sba));

        /* assume lcd is on */
        sc->sc_lcd = 1;
        /* erase wince cursor */
        ite8181_erase_cursor(sc);

        /* Add a power hook to power saving */
        sc->sc_powerhook = powerhook_establish(device_xname(sc->sc_dev),
            ite8181_power, sc);
        if (sc->sc_powerhook == NULL)
                printf("%s: WARNING: unable to establish power hook\n",
                    device_xname(sc->sc_dev));

        /* Add a hard power hook to power saving */
        sc->sc_hardpowerhook = config_hook(CONFIG_HOOK_PMEVENT,
            CONFIG_HOOK_PMEVENT_HARDPOWER,
            CONFIG_HOOK_SHARE,
            ite8181_hardpower, sc);
        if (sc->sc_hardpowerhook == NULL)
                printf("%s: WARNING: unable to establish hard power hook\n",
                    device_xname(sc->sc_dev));

        /* initialize backlight brightness and lcd contrast */
        sc->sc_lcd_inited = 0;
        ite8181_init_brightness(sc, 1);
        ite8181_init_contrast(sc, 1);
        ite8181_init_backlight(sc, 1);

        if (console && hpcfb_cnattach(&sc->sc_fbconf) != 0) {
                panic("ite8181_attach: can't init fb console");
        }

        ha.ha_console = console;
        ha.ha_accessops = &ite8181_ha;
        ha.ha_accessctx = sc;
        ha.ha_curfbconf = 0;
        ha.ha_nfbconf = 1;
        ha.ha_fbconflist = &sc->sc_fbconf;
        ha.ha_curdspconf = 0;
        ha.ha_ndspconf = 1;
        ha.ha_dspconflist = &sc->sc_dspconf;

        config_found(sc->sc_dev, &ha, hpcfbprint, CFARGS_NONE);

#if NBIVIDEO > 0
        /*
         * bivideo is no longer need
         */
        bivideo_dont_attach = 1;
#endif /* NBIVIDEO > 0 */
}

int
ite8181_lcd_power(struct ite8181_softc *sc, int on)
{
        int lcd_p;
        int lcd_s;
        int lcd_seq;
        int loop = 10;

        if (ite8181_lcd_control_disable) {
                VPRINTF(("ite8171_lcd_control_disable!: %s\n", on?"on":"off"));
                return 0;
        }

        if (sc->sc_lcd != on) {
                ite8181_ema_write_1(sc, ITE8181_EMA_ENABLEEMA,
                    ITE8181_EMA_ENABLEPASS);
                lcd_p = ite8181_ema_read_1(sc, ITE8181_EMA_LCDPOWER);
                lcd_s = ite8181_ema_read_1(sc, ITE8181_EMA_LCDPOWERSTAT);
                lcd_seq = ite8181_ema_read_1(sc, ITE8181_EMA_LCDPOWERSEQ);
                DPRINTFN(1,("ite8181_lcd_power(%d)< p=%x, s=%x, seq=%x\n",
                    on,
                    lcd_p, lcd_s, lcd_seq));
                if (on) {
                        sc->sc_lcd = 1;
                        lcd_seq |= (ITE8181_PUP0|ITE8181_PUP1|ITE8181_PUP2);
                        ite8181_ema_write_1(sc, ITE8181_EMA_LCDPOWERSEQ,
                            lcd_seq);
                        lcd_p &= ~ITE8181_LCDSTANDBY;
                        ite8181_ema_write_1(sc, ITE8181_EMA_LCDPOWER, lcd_p);
                        /*
                         * XXX:
                         * IBM WorkPad z50 power unit has too weak power.
                         * So we must wait too many times to access self device
                         * after LCD panel and BackLight on.
                         * Currently delay is not enough ??? FIXME
                         */
                        delay(ite8181_lcd_on_self_delay*MSEC);
                        while (loop--) {
                                lcd_p = ite8181_ema_read_1(sc,
                                    ITE8181_EMA_LCDPOWER);
                                lcd_s = ite8181_ema_read_1(sc,
                                    ITE8181_EMA_LCDPOWERSTAT);
                                lcd_seq = ite8181_ema_read_1(sc,
                                    ITE8181_EMA_LCDPOWERSEQ);
                                DPRINTFN(1,("ite8181_lcd_power(%d)%d| p=%x,"
                                    " s=%x, seq=%x\n", on, loop, lcd_p, lcd_s,
                                    lcd_seq));
                                /*
                                 *  XXX the states which are not described
                                 *  XXX in manual.
                                 */
                                if (!(lcd_s&ITE8181_LCDPSTANDBY) &&
                                    !(lcd_s&ITE8181_LCDPUP) &&
                                    (lcd_s&ITE8181_LCDPON))
                                        break;
                                delay(100);
                        }
                        lcd_s |= ITE8181_PPTOBEON;
                        ite8181_ema_write_1(sc, ITE8181_EMA_LCDPOWERSTAT,
                            lcd_s);
                } else {
                        sc->sc_lcd = 0;
                        lcd_p |= ITE8181_LCDSTANDBY;
                        ite8181_ema_write_1(sc, ITE8181_EMA_LCDPOWER, lcd_p);
                        while (loop--) {
                                lcd_p = ite8181_ema_read_1(sc,
                                    ITE8181_EMA_LCDPOWER);
                                lcd_s = ite8181_ema_read_1(sc,
                                    ITE8181_EMA_LCDPOWERSTAT);
                                lcd_seq = ite8181_ema_read_1(sc,
                                    ITE8181_EMA_LCDPOWERSEQ);
                                DPRINTFN(1,("ite8181_lcd_power(%d)%d| p=%x,"
                                    " s=%x, seq=%x\n", on, loop, lcd_p, lcd_s,
                                    lcd_seq));
                                /*
                                 * XXX the states which are not described
                                 * XXX in manual.
                                 */
                                if ((lcd_s&ITE8181_LCDPSTANDBY) &&
                                    !(lcd_s&ITE8181_LCDPDOWN) &&
                                    !(lcd_s&ITE8181_LCDPON))
                                        break;
                                delay(100);
                        }
                        lcd_s &= ~ITE8181_PPTOBEON;
                        ite8181_ema_write_1(sc, ITE8181_EMA_LCDPOWERSTAT,
                            lcd_s);
                }
                DPRINTFN(1,("ite8181_lcd_power(%d)> p=%x, s=%x, seq=%x\n",
                    on,
                    ite8181_ema_read_1(sc, ITE8181_EMA_LCDPOWER),
                    ite8181_ema_read_1(sc, ITE8181_EMA_LCDPOWERSTAT),
                    ite8181_ema_read_1(sc, ITE8181_EMA_LCDPOWERSEQ)));
                ite8181_ema_write_1(sc, ITE8181_EMA_ENABLEEMA,
                    ITE8181_EMA_DISABLEPASS);
        }
        return 0;
}

static void
ite8181_erase_cursor(struct ite8181_softc *sc)
{
        ite8181_gui_write_1(sc, ITE8181_GUI_C1C, 0); /* Cursor 1 Control Reg. */
        /* other ? */
}

static void
ite8181_update_powerstate(struct ite8181_softc *sc, int updates)
{
        if (updates & PWRSTAT_LCD)
                config_hook_call(CONFIG_HOOK_POWERCONTROL,
                    CONFIG_HOOK_POWERCONTROL_LCD,
                    (void*)!(sc->sc_powerstate &
                        (PWRSTAT_VIDEOOFF|PWRSTAT_SUSPEND)));

        if (updates & PWRSTAT_BACKLIGHT)
                config_hook_call(CONFIG_HOOK_POWERCONTROL,
                    CONFIG_HOOK_POWERCONTROL_LCDLIGHT,
                    (void*)(!(sc->sc_powerstate &
                        (PWRSTAT_VIDEOOFF|PWRSTAT_SUSPEND)) &&
                        (sc->sc_powerstate & PWRSTAT_BACKLIGHT)));
}

static void
ite8181_power(int why, void *arg)
{
        struct ite8181_softc *sc = arg;

        switch (why) {
        case PWR_STANDBY:
                sc->sc_powerstate |= PWRSTAT_SUSPEND;
                ite8181_update_powerstate(sc, PWRSTAT_ALL);
                break;
        case PWR_SUSPEND:
                sc->sc_powerstate |= PWRSTAT_SUSPEND;
                ite8181_update_powerstate(sc, PWRSTAT_ALL);
                break;
        case PWR_RESUME:
                sc->sc_powerstate &= ~PWRSTAT_SUSPEND;
                ite8181_update_powerstate(sc, PWRSTAT_ALL);
                break;
        }
}

static int
ite8181_hardpower(void *ctx, int type, long id, void *msg)
{
        struct ite8181_softc *sc = ctx;
        int why = (int)msg;

        switch (why) {
        case PWR_STANDBY:
                /* ite8181_lcd_power(sc, 0); */
                delay(MSEC);
                break;
        case PWR_SUSPEND:
                ite8181_lcd_power(sc, 0);
                delay(MSEC);
                break;
        case PWR_RESUME:
                delay(MSEC);
                ite8181_lcd_power(sc, 1);
                /*
                 * XXX:
                 * IBM WorkPad z50 power unit has too weak power.
                 * So we must wait too many times to access other devices
                 * after LCD panel and BackLight on.
                 */
                delay(ite8181_lcd_on_delay*MSEC);
                break;
        }

        /*
         * you should wait until the
         * power state transit sequence will end.
         */

        return (0);
}

static int
ite8181_fbinit(struct hpcfb_fbconf *fb)
{

        /*
         * get fb settings from bootinfo
         */
        if (bootinfo == NULL ||
            bootinfo->fb_addr == 0 ||
            bootinfo->fb_line_bytes == 0 ||
            bootinfo->fb_width == 0 ||
            bootinfo->fb_height == 0) {
                printf("no frame buffer information.\n");
                return (-1);
        }

        /* zero fill */
        memset(fb, 0, sizeof(*fb));

        fb->hf_conf_index       = 0;    /* configuration index          */
        fb->hf_nconfs           = 1;    /* how many configurations      */
        strcpy(fb->hf_name, "built-in video");
                                        /* frame buffer name            */
        strcpy(fb->hf_conf_name, "default");
                                        /* configuration name           */
        fb->hf_height           = bootinfo->fb_height;
        fb->hf_width            = bootinfo->fb_width;
        fb->hf_baseaddr         = (u_long)bootinfo->fb_addr;
        fb->hf_offset           = (u_long)bootinfo->fb_addr -
            mips_ptob(mips_btop(bootinfo->fb_addr));
                                        /* frame buffer start offset    */
        fb->hf_bytes_per_line   = bootinfo->fb_line_bytes;
        fb->hf_nplanes          = 1;
        fb->hf_bytes_per_plane  = bootinfo->fb_height *
            bootinfo->fb_line_bytes;

        fb->hf_access_flags |= HPCFB_ACCESS_BYTE;
        fb->hf_access_flags |= HPCFB_ACCESS_WORD;
        fb->hf_access_flags |= HPCFB_ACCESS_DWORD;

        switch (bootinfo->fb_type) {
                /*
                 * gray scale
                 */
        case BIFB_D2_M2L_3:
        case BIFB_D2_M2L_3x2:
                fb->hf_access_flags |= HPCFB_ACCESS_REVERSE;
                /* fall through */
        case BIFB_D2_M2L_0:
        case BIFB_D2_M2L_0x2:
                fb->hf_class = HPCFB_CLASS_GRAYSCALE;
                fb->hf_access_flags |= HPCFB_ACCESS_STATIC;
                fb->hf_pack_width = 8;
                fb->hf_pixels_per_pack = 4;
                fb->hf_pixel_width = 2;
                fb->hf_class_data_length = sizeof(struct hf_gray_tag);
                fb->hf_u.hf_gray.hf_flags = 0;  /* reserved for future use */
                break;

        case BIFB_D4_M2L_F:
        case BIFB_D4_M2L_Fx2:
                fb->hf_access_flags |= HPCFB_ACCESS_REVERSE;
                /* fall through */
        case BIFB_D4_M2L_0:
        case BIFB_D4_M2L_0x2:
                fb->hf_class = HPCFB_CLASS_GRAYSCALE;
                fb->hf_access_flags |= HPCFB_ACCESS_STATIC;
                fb->hf_pack_width = 8;
                fb->hf_pixels_per_pack = 2;
                fb->hf_pixel_width = 4;
                fb->hf_class_data_length = sizeof(struct hf_gray_tag);
                fb->hf_u.hf_gray.hf_flags = 0;  /* reserved for future use */
                break;

                /*
                 * indexed color
                 */
        case BIFB_D8_FF:
                fb->hf_access_flags |= HPCFB_ACCESS_REVERSE;
                /* fall through */
        case BIFB_D8_00:
                fb->hf_class = HPCFB_CLASS_INDEXCOLOR;
                fb->hf_access_flags |= HPCFB_ACCESS_STATIC;
                fb->hf_pack_width = 8;
                fb->hf_pixels_per_pack = 1;
                fb->hf_pixel_width = 8;
                fb->hf_class_data_length = sizeof(struct hf_indexed_tag);
                fb->hf_u.hf_indexed.hf_flags = 0; /* reserved for future use */
                break;

                /*
                 * RGB color
                 */
        case BIFB_D16_FFFF:
                fb->hf_access_flags |= HPCFB_ACCESS_REVERSE;
                /* fall through */
        case BIFB_D16_0000:
                fb->hf_class = HPCFB_CLASS_RGBCOLOR;
                fb->hf_access_flags |= HPCFB_ACCESS_STATIC;
                fb->hf_order_flags = HPCFB_REVORDER_BYTE;
                fb->hf_pack_width = 16;
                fb->hf_pixels_per_pack = 1;
                fb->hf_pixel_width = 16;

                fb->hf_class_data_length = sizeof(struct hf_rgb_tag);
                fb->hf_u.hf_rgb.hf_flags = 0;   /* reserved for future use */

                fb->hf_u.hf_rgb.hf_red_width = 5;
                fb->hf_u.hf_rgb.hf_red_shift = 11;
                fb->hf_u.hf_rgb.hf_green_width = 6;
                fb->hf_u.hf_rgb.hf_green_shift = 5;
                fb->hf_u.hf_rgb.hf_blue_width = 5;
                fb->hf_u.hf_rgb.hf_blue_shift = 0;
                fb->hf_u.hf_rgb.hf_alpha_width = 0;
                fb->hf_u.hf_rgb.hf_alpha_shift = 0;
                break;

        default:
                printf("unknown type (=%d).\n", bootinfo->fb_type);
                return (-1);
                break;
        }

        return (0); /* no error */
}

int
ite8181_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{
        struct ite8181_softc *sc = (struct ite8181_softc *)v;
        struct hpcfb_fbconf *fbconf;
        struct hpcfb_dspconf *dspconf;
        struct wsdisplay_cmap *cmap;
        struct wsdisplay_param *dispparam;
        int error;

        switch (cmd) {
        case WSDISPLAYIO_GETCMAP:
                cmap = (struct wsdisplay_cmap *)data;

                if (sc->sc_fbconf.hf_class != HPCFB_CLASS_INDEXCOLOR ||
                    sc->sc_fbconf.hf_pack_width != 8 ||
                    256 <= cmap->index ||
                    256 - cmap->index < cmap->count)
                        return (EINVAL);

#ifdef ITE8181_WINCE_CMAP
                error = copyout(&bivideo_cmap_r[cmap->index], cmap->red,
                                cmap->count);
                if (error)
                        return error;
                error = copyout(&bivideo_cmap_g[cmap->index], cmap->green,
                                cmap->count);
                if (error)
                        return error;
                error = copyout(&bivideo_cmap_b[cmap->index], cmap->blue,
                                cmap->count);
                return error;
#else /* ITE8181_WINCE_CMAP */
                return EINVAL;
#endif /* ITE8181_WINCE_CMAP */

        case WSDISPLAYIO_PUTCMAP:
                /*
                 * This driver can't set color map.
                 */
                return (EINVAL);

        case WSDISPLAYIO_SVIDEO:
                if (*(int *)data == WSDISPLAYIO_VIDEO_OFF)
                        sc->sc_powerstate |= PWRSTAT_VIDEOOFF;
                else
                        sc->sc_powerstate &= ~PWRSTAT_VIDEOOFF;
                ite8181_update_powerstate(sc, PWRSTAT_ALL);
                return 0;

        case WSDISPLAYIO_GVIDEO:
                *(int *)data = (sc->sc_powerstate&PWRSTAT_VIDEOOFF) ?
                    WSDISPLAYIO_VIDEO_OFF:WSDISPLAYIO_VIDEO_ON;
                return 0;


        case WSDISPLAYIO_GETPARAM:
                dispparam = (struct wsdisplay_param*)data;
                switch (dispparam->param) {
                case WSDISPLAYIO_PARAM_BACKLIGHT:
                        VPRINTF(("ite8181_ioctl: GET:BACKLIGHT\n"));
                        ite8181_init_brightness(sc, 0);
                        ite8181_init_backlight(sc, 0);
                        VPRINTF(("ite8181_ioctl: GET:(real)BACKLIGHT %d\n",
                            (sc->sc_powerstate&PWRSTAT_BACKLIGHT)? 1: 0));
                        dispparam->min = 0;
                        dispparam->max = 1;
                        if (sc->sc_max_brightness > 0)
                                dispparam->curval =
                                    sc->sc_brightness > 0 ? 1: 0;
                        else
                                dispparam->curval =
                                    (sc->sc_powerstate & PWRSTAT_BACKLIGHT)
                                    ? 1: 0;
                        VPRINTF(("ite8181_ioctl: GET:BACKLIGHT:%d(%s)\n",
                            dispparam->curval,
                            sc->sc_max_brightness > 0? "brightness": "light"));
                        return 0;
                        break;
                case WSDISPLAYIO_PARAM_CONTRAST:
                        VPRINTF(("ite8181_ioctl: GET:CONTRAST\n"));
                        ite8181_init_contrast(sc, 0);
                        if (sc->sc_max_contrast > 0) {
                                dispparam->min = 0;
                                dispparam->max = sc->sc_max_contrast;
                                dispparam->curval = sc->sc_contrast;
                                VPRINTF(("ite8181_ioctl: GET:CONTRAST max=%d,"
                                    " current=%d\n", sc->sc_max_contrast,
                                    sc->sc_contrast));
                                return 0;
                        } else {
                                VPRINTF(("ite8181_ioctl: "
                                    "GET:CONTRAST EINVAL\n"));
                                return (EINVAL);
                        }
                        break;
                case WSDISPLAYIO_PARAM_BRIGHTNESS:
                        VPRINTF(("ite8181_ioctl: GET:BRIGHTNESS\n"));
                        ite8181_init_brightness(sc, 0);
                        if (sc->sc_max_brightness > 0) {
                                dispparam->min = 0;
                                dispparam->max = sc->sc_max_brightness;
                                dispparam->curval = sc->sc_brightness;
                                VPRINTF(("ite8181_ioctl: GET:BRIGHTNESS"
                                    " max=%d, current=%d\n",
                                    sc->sc_max_brightness, sc->sc_brightness));
                                return 0;
                        } else {
                                VPRINTF(("ite8181_ioctl: GET:BRIGHTNESS"
                                    " EINVAL\n"));
                                return (EINVAL);
                        }
                        return (EINVAL);
                default:
                        return (EINVAL);
                }
                return (0);

        case WSDISPLAYIO_SETPARAM:
                dispparam = (struct wsdisplay_param*)data;
                switch (dispparam->param) {
                case WSDISPLAYIO_PARAM_BACKLIGHT:
                        VPRINTF(("ite8181_ioctl: SET:BACKLIGHT\n"));
                        if (dispparam->curval < 0 ||
                            1 < dispparam->curval)
                                return (EINVAL);
                        ite8181_init_brightness(sc, 0);
                        VPRINTF(("ite8181_ioctl: SET:max brightness=%d\n",
                            sc->sc_max_brightness));
                        if (sc->sc_max_brightness > 0) { /* dimmer */
                                if (dispparam->curval == 0){
                                        sc->sc_brightness_save =
                                            sc->sc_brightness;
                                        ite8181_set_brightness(sc, 0);/* min */
                                } else {
                                        if (sc->sc_brightness_save == 0)
                                                sc->sc_brightness_save =
                                                    sc->sc_max_brightness;
                                        ite8181_set_brightness(sc,
                                            sc->sc_brightness_save);
                                }
                                VPRINTF(("ite8181_ioctl: SET:BACKLIGHT:"
                                    "brightness=%d\n", sc->sc_brightness));
                        } else { /* off */
                                if (dispparam->curval == 0)
                                        sc->sc_powerstate &= ~PWRSTAT_BACKLIGHT;
                                else
                                        sc->sc_powerstate |= PWRSTAT_BACKLIGHT;
                                VPRINTF(("ite8181_ioctl: SET:BACKLIGHT:"
                                    "powerstate %d\n",
                                    (sc->sc_powerstate & PWRSTAT_BACKLIGHT)
                                    ? 1 : 0));
                                ite8181_update_powerstate(sc,
                                    PWRSTAT_BACKLIGHT);
                                VPRINTF(("ite8181_ioctl: SET:BACKLIGHT:%d\n",
                                    (sc->sc_powerstate & PWRSTAT_BACKLIGHT)
                                    ? 1 : 0));
                        }
                        return 0;
                        break;
                case WSDISPLAYIO_PARAM_CONTRAST:
                        VPRINTF(("ite8181_ioctl: SET:CONTRAST\n"));
                        ite8181_init_contrast(sc, 0);
                        if (dispparam->curval < 0 ||
                            sc->sc_max_contrast < dispparam->curval)
                                return (EINVAL);
                        if (sc->sc_max_contrast > 0) {
                                int org = sc->sc_contrast;
                                ite8181_set_contrast(sc, dispparam->curval);
                                VPRINTF(("ite8181_ioctl: SET:CONTRAST"
                                    " org=%d, current=%d\n", org,
                                    sc->sc_contrast));
                                return 0;
                        } else {
                                VPRINTF(("ite8181_ioctl: SET:CONTRAST"
                                    " EINVAL\n"));
                                return (EINVAL);
                        }
                        break;
                case WSDISPLAYIO_PARAM_BRIGHTNESS:
                        VPRINTF(("ite8181_ioctl: SET:BRIGHTNESS\n"));
                        ite8181_init_brightness(sc, 0);
                        if (dispparam->curval < 0 ||
                            sc->sc_max_brightness < dispparam->curval)
                                return (EINVAL);
                        if (sc->sc_max_brightness > 0) {
                                int org = sc->sc_brightness;
                                ite8181_set_brightness(sc, dispparam->curval);
                                VPRINTF(("ite8181_ioctl: SET:BRIGHTNESS"
                                    " org=%d, current=%d\n", org,
                                    sc->sc_brightness));
                                return 0;
                        } else {
                                VPRINTF(("ite8181_ioctl: SET:BRIGHTNESS"
                                    " EINVAL\n"));
                                return (EINVAL);
                        }
                        break;
                default:
                        return (EINVAL);
                }
                return (0);

        case HPCFBIO_GCONF:
                fbconf = (struct hpcfb_fbconf *)data;
                if (fbconf->hf_conf_index != 0 &&
                    fbconf->hf_conf_index != HPCFB_CURRENT_CONFIG) {
                        return (EINVAL);
                }
                *fbconf = sc->sc_fbconf;        /* structure assignment */
                return (0);
        case HPCFBIO_SCONF:
                fbconf = (struct hpcfb_fbconf *)data;
                if (fbconf->hf_conf_index != 0 &&
                    fbconf->hf_conf_index != HPCFB_CURRENT_CONFIG) {
                        return (EINVAL);
                }
                /*
                 * nothing to do because we have only one configuration
                 */
                return (0);
        case HPCFBIO_GDSPCONF:
                dspconf = (struct hpcfb_dspconf *)data;
                if ((dspconf->hd_unit_index != 0 &&
                    dspconf->hd_unit_index != HPCFB_CURRENT_UNIT) ||
                    (dspconf->hd_conf_index != 0 &&
                        dspconf->hd_conf_index != HPCFB_CURRENT_CONFIG)) {
                        return (EINVAL);
                }
                *dspconf = sc->sc_dspconf;      /* structure assignment */
                return (0);
        case HPCFBIO_SDSPCONF:
                dspconf = (struct hpcfb_dspconf *)data;
                if ((dspconf->hd_unit_index != 0 &&
                    dspconf->hd_unit_index != HPCFB_CURRENT_UNIT) ||
                    (dspconf->hd_conf_index != 0 &&
                        dspconf->hd_conf_index != HPCFB_CURRENT_CONFIG)) {
                        return (EINVAL);
                }
                /*
                 * nothing to do
                 * because we have only one unit and one configuration
                 */
                return (0);
        case HPCFBIO_GOP:
        case HPCFBIO_SOP:
                /*
                 * currently not implemented...
                 */
                return (EINVAL);
        }

        return (EPASSTHROUGH);
}

paddr_t
ite8181_mmap(void *ctx, off_t offset, int prot)
{
        struct ite8181_softc *sc = (struct ite8181_softc *)ctx;

        if (offset < 0 ||
            (sc->sc_fbconf.hf_bytes_per_plane +
                sc->sc_fbconf.hf_offset) <  offset)
                return -1;

        return mips_btop((u_long)bootinfo->fb_addr + offset);
}


void
ite8181_init_backlight(struct ite8181_softc *sc, int inattach)
{
        int val = -1;

        if (sc->sc_lcd_inited&BACKLIGHT_INITED)
                return;

        if (config_hook_call(CONFIG_HOOK_GET,
            CONFIG_HOOK_POWER_LCDLIGHT, &val) != -1) {
                /* we can get real light state */
                VPRINTF(("ite8181_init_backlight: real backlight=%d\n", val));
                if (val == 0)
                        sc->sc_powerstate &= ~PWRSTAT_BACKLIGHT;
                else
                        sc->sc_powerstate |= PWRSTAT_BACKLIGHT;
                sc->sc_lcd_inited |= BACKLIGHT_INITED;
        } else if (inattach) {
                /*
                   we cannot get real light state in attach time
                   because light device not yet attached.
                   we will retry in !inattach.
                   temporary assume light is on.
                */
                sc->sc_powerstate |= PWRSTAT_BACKLIGHT;
        } else {
                /* we cannot get real light state, so work by myself state */
                sc->sc_lcd_inited |= BACKLIGHT_INITED;
        }
}

void
ite8181_init_brightness(struct ite8181_softc *sc, int inattach)
{
        int val = -1;

        if (sc->sc_lcd_inited&BRIGHTNESS_INITED)
                return;

        VPRINTF(("ite8181_init_brightness\n"));
        if (config_hook_call(CONFIG_HOOK_GET,
            CONFIG_HOOK_BRIGHTNESS_MAX, &val) != -1) {
                /* we can get real brightness max */
                VPRINTF(("ite8181_init_brightness: real brightness max=%d\n",
                    val));
                sc->sc_max_brightness = val;
                val = -1;
                if (config_hook_call(CONFIG_HOOK_GET,
                    CONFIG_HOOK_BRIGHTNESS, &val) != -1) {
                        /* we can get real brightness */
                        VPRINTF(("ite8181_init_brightness:"
                            " real brightness=%d\n", val));
                        sc->sc_brightness_save = sc->sc_brightness = val;
                } else {
                        sc->sc_brightness_save =
                            sc->sc_brightness = sc->sc_max_brightness;
                }
                sc->sc_lcd_inited |= BRIGHTNESS_INITED;
        } else if (inattach) {
                /*
                   we cannot get real brightness in attach time
                   because brightness device not yet attached.
                   we will retry in !inattach.
                */
                sc->sc_max_brightness = -1;
                sc->sc_brightness = -1;
                sc->sc_brightness_save = -1;
        } else {
                /* we cannot get real brightness */
                sc->sc_lcd_inited |= BRIGHTNESS_INITED;
        }

        return;
}

void
ite8181_init_contrast(struct ite8181_softc *sc, int inattach)
{
        int val = -1;

        if (sc->sc_lcd_inited&CONTRAST_INITED)
                return;

        VPRINTF(("ite8181_init_contrast\n"));
        if (config_hook_call(CONFIG_HOOK_GET,
            CONFIG_HOOK_CONTRAST_MAX, &val) != -1) {
                /* we can get real contrast max */
                VPRINTF(("ite8181_init_contrast: real contrast max=%d\n", val));
                sc->sc_max_contrast = val;
                val = -1;
                if (config_hook_call(CONFIG_HOOK_GET,
                    CONFIG_HOOK_CONTRAST, &val) != -1) {
                        /* we can get real contrast */
                        VPRINTF(("ite8181_init_contrast: real contrast=%d\n",
                            val));
                        sc->sc_contrast = val;
                } else {
                        sc->sc_contrast = sc->sc_max_contrast;
                }
                sc->sc_lcd_inited |= CONTRAST_INITED;
        } else if (inattach) {
                /*
                   we cannot get real contrast in attach time
                   because contrast device not yet attached.
                   we will retry in !inattach.
                */
                sc->sc_max_contrast = -1;
                sc->sc_contrast = -1;
        } else {
                /* we cannot get real contrast */
                sc->sc_lcd_inited |= CONTRAST_INITED;
        }

        return;
}


void
ite8181_set_brightness(struct ite8181_softc *sc, int val)
{

        sc->sc_brightness = val;

        config_hook_call(CONFIG_HOOK_SET, CONFIG_HOOK_BRIGHTNESS, &val);
        if (config_hook_call(CONFIG_HOOK_GET,
            CONFIG_HOOK_BRIGHTNESS, &val) != -1) {
                sc->sc_brightness = val;
        }
}

void
ite8181_set_contrast(struct ite8181_softc *sc, int val)
{

        sc->sc_contrast = val;

        config_hook_call(CONFIG_HOOK_SET, CONFIG_HOOK_CONTRAST, &val);
        if (config_hook_call(CONFIG_HOOK_GET,
            CONFIG_HOOK_CONTRAST, &val) != -1) {
                sc->sc_contrast = val;
        }
}