/*      $NetBSD: sed_saip.c,v 1.29 2022/05/28 10:36:22 andvar Exp $     */

/*-
 * Copyright (c) 1999-2001
 *         Shin Takemura and PocketBSD Project. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the PocketBSD project
 *      and its contributors.
 * 4. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * 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: sed_saip.c,v 1.29 2022/05/28 10:36:22 andvar Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/reboot.h>
#include <sys/bus.h>

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

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

#include <dev/rasops/rasops.h>

#include <dev/hpc/hpcfbvar.h>
#include <dev/hpc/hpcfbio.h>
#include <dev/hpc/hpccmapvar.h>

#include <hpcarm/dev/sed1356var.h>

#ifdef SED_DEBUG
#define VPRINTF(arg)    do { if (bootverbose) aprint_normal arg; } while (0)
#else
#define VPRINTF(arg)    /* nothing */
#endif

/*
 * Function prototypes.
 */
static int      sed1356_match(device_t, cfdata_t, void *);
static void     sed1356_attach(device_t, device_t, void *);
static int      sed1356_ioctl(void *, u_long, void *, int, struct lwp *);
static paddr_t  sed1356_mmap(void *, off_t, int);

static int      sed1356_init(struct hpcfb_fbconf *);
static void     sed1356_power(int, void *);
static void     sed1356_update_powerstate(struct sed1356_softc *, int);
static void     sed1356_init_backlight(struct sed1356_softc *, int);
static void     sed1356_set_brightness(struct sed1356_softc *, int);
static void     sed1356_set_contrast(struct sed1356_softc *, int);

#if defined __mips__ || defined __sh__ || defined __arm__
#define __BTOP(x)               ((paddr_t)(x) >> PGSHIFT)
#define __PTOB(x)               ((paddr_t)(x) << PGSHIFT)
#else
#error "define btop, ptob."
#endif

/*
 * External functions/variables.
 */
extern struct cfdriver sed_cd;
extern struct bus_space sa11x0_bs_tag;
extern int j720lcd_power(void *, int, long, void *);   /* XXX */

/*
 * Static variables.
 */
CFATTACH_DECL_NEW(sed, sizeof(struct sed1356_softc),
    sed1356_match, sed1356_attach, NULL, NULL);
struct hpcfb_accessops sed1356_ha = {
        sed1356_ioctl, sed1356_mmap
};

static int attach_flag = 0;

/*
 * Function bodies.
 */
static int
sed1356_match(device_t parent, cfdata_t match, void *aux)
{

        /* XXX check version register */
        return 1;
}

static void
sed1356_attach(device_t parent, device_t self, void *aux)
{
        struct sed1356_softc *sc = device_private(self);
        struct hpcfb_attach_args ha;
        int console = (bootinfo->bi_cnuse & BI_CNUSE_SERIAL) ? 0 : 1;

        if (attach_flag) {
                panic("%s(%d): sed1356 attached twice", __FILE__, __LINE__);
        }
        attach_flag = 1;

        if (sed1356_init(&sc->sc_fbconf) != 0) {
                /* just return so that hpcfb will not be attached */
                return;
        }
        aprint_normal("\n");

        sc->sc_dev = self;
        sc->sc_iot = &sa11x0_bs_tag;
        sc->sc_parent = device_private(parent);
        if (bus_space_map(sc->sc_iot, (bus_addr_t)bootinfo->fb_addr & ~0x3fffff,
            0x200, 0, &sc->sc_regh)) {
                aprint_normal_dev(self, "unable to map register\n");
                return;
        }

        aprint_normal_dev(self, "Epson SED1356");
        if (console) {
                aprint_normal(", console");
        }
        aprint_normal("\n");
        aprint_normal_dev(self, "framebuffer address: 0x%08lx\n",
                          (u_long)bootinfo->fb_addr);

        /* Add a suspend hook to power saving */
        sc->sc_powerstate = 0;
        sc->sc_powerhook = powerhook_establish(device_xname(self),
            sed1356_power, sc);
        if (sc->sc_powerhook == NULL)
                aprint_normal_dev(self, "WARNING: unable to establish power hook\n");

        /* Initialize backlight brightness and lcd contrast */
        sc->sc_lcd_inited = 0;
        sed1356_init_brightness(sc, 1);
        sed1356_init_contrast(sc, 1);
        sed1356_init_backlight(sc, 1);

        if (console && hpcfb_cnattach(&sc->sc_fbconf) != 0)
                panic("sed1356_attach: cannot init fb console");

        ha.ha_console = console;
        ha.ha_accessops = &sed1356_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;

        /* XXX */
        if (platid_match(&platid, &platid_mask_MACH_HP_JORNADA_7XX)) {
                config_hook(CONFIG_HOOK_POWERCONTROL,
                            CONFIG_HOOK_POWERCONTROL_LCDLIGHT,
                            CONFIG_HOOK_SHARE, j720lcd_power, sc);
        }

        config_found(self, &ha, hpcfbprint, CFARGS_NONE);
}

static int
sed1356_init(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) {
                aprint_normal("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;

        if (bus_space_map(&sa11x0_bs_tag, (bus_addr_t)bootinfo->fb_addr,
                           bootinfo->fb_height * bootinfo->fb_line_bytes,
                           0, &fb->hf_baseaddr)) {
                aprint_normal("unable to map framebuffer\n");
                return -1;
        }
        fb->hf_offset           = (u_long)bootinfo->fb_addr -
                                      __PTOB(__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_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:
                aprint_normal("unsupported type %d.\n", bootinfo->fb_type);
                return -1;
        }

        return 0; /* no error */
}

static void
sed1356_power(int why, void *arg)
{
        struct sed1356_softc *sc = arg;

        switch (why) {
        case PWR_SUSPEND:
        case PWR_STANDBY:
                sc->sc_powerstate |= PWRSTAT_SUSPEND;
                sed1356_update_powerstate(sc, PWRSTAT_ALL);
                break;
        case PWR_RESUME:
                sc->sc_powerstate &= ~PWRSTAT_SUSPEND;
                sed1356_update_powerstate(sc, PWRSTAT_ALL);
                break;
        }
}

static void
sed1356_update_powerstate(struct sed1356_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 int
sed1356_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{
        struct sed1356_softc *sc = (struct sed1356_softc *)v;
        struct hpcfb_fbconf *fbconf;
        struct hpcfb_dspconf *dspconf;
        struct wsdisplay_param *dispparam;

        switch (cmd) {
        case WSDISPLAYIO_GETCMAP:
        case WSDISPLAYIO_PUTCMAP:
                /*
                 * XXX should be able to handle color map in 4/8 bpp mode.
                 */
                return EINVAL;

        case WSDISPLAYIO_SVIDEO:
                if (*(int *)data == WSDISPLAYIO_VIDEO_OFF)
                        sc->sc_powerstate |= PWRSTAT_VIDEOOFF;
                else
                        sc->sc_powerstate &= ~PWRSTAT_VIDEOOFF;
                sed1356_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(("sed1356_ioctl: GET:BACKLIGHT\n"));
                        sed1356_init_brightness(sc, 0);
                        sed1356_init_backlight(sc, 0);
                        VPRINTF(("sed1356_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(("sed1356_ioctl: GET:BACKLIGHT:%d(%s)\n",
                            dispparam->curval, (sc->sc_max_brightness > 0) ?
                            "brightness": "light"));
                        return 0;

                case WSDISPLAYIO_PARAM_CONTRAST:
                        VPRINTF(("sed1356_ioctl: GET:CONTRAST\n"));
                        sed1356_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(("sed1356_ioctl: GET:CONTRAST max=%d,"
                                    " current=%d\n", sc->sc_max_contrast,
                                    sc->sc_contrast));
                                return 0;
                        }
                        VPRINTF(("sed1356_ioctl: GET:CONTRAST EINVAL\n"));
                        return EINVAL;

                case WSDISPLAYIO_PARAM_BRIGHTNESS:
                        VPRINTF(("sed1356_ioctl: GET:BRIGHTNESS\n"));
                        sed1356_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(("sed1356_ioctl: GET:BRIGHTNESS max=%d,"
                                    " current=%d\n", sc->sc_max_brightness,
                                    sc->sc_brightness));
                                return 0;
                        }
                        VPRINTF(("sed1356_ioctl: GET:BRIGHTNESS EINVAL\n"));
                        return EINVAL;

                default:
                        return EINVAL;
                }
                break;

        case WSDISPLAYIO_SETPARAM:
                dispparam = (struct wsdisplay_param*)data;
                switch (dispparam->param) {
                case WSDISPLAYIO_PARAM_BACKLIGHT:
                        VPRINTF(("sed1356_ioctl: SET:BACKLIGHT\n"));
                        if (dispparam->curval < 0 || 1 < dispparam->curval)
                                return EINVAL;
                        sed1356_init_brightness(sc, 0);
                        VPRINTF(("sed1356_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;
                                        sed1356_set_brightness(sc, 0); /* min */
                                } else {
                                        if (sc->sc_brightness_save == 0)
                                                sc->sc_brightness_save =
                                                    sc->sc_max_brightness;
                                        sed1356_set_brightness(sc,
                                            sc->sc_brightness_save);
                                }
                                VPRINTF(("sed1356_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(("sed1356_ioctl: SET:BACKLIGHT:"
                                    "powerstate %d\n", (sc->sc_powerstate &
                                    PWRSTAT_BACKLIGHT) ? 1 : 0));
                                sed1356_update_powerstate(sc, PWRSTAT_BACKLIGHT);
                                VPRINTF(("sed1356_ioctl: SET:BACKLIGHT:%d\n",
                                    (sc->sc_powerstate & PWRSTAT_BACKLIGHT) ?
                                    1 : 0));
                        }
                        return 0;

                case WSDISPLAYIO_PARAM_CONTRAST:
                        VPRINTF(("sed1356_ioctl: SET:CONTRAST\n"));
                        sed1356_init_contrast(sc, 0);
                        if (dispparam->curval < 0 ||
                            sc->sc_max_contrast < dispparam->curval)
                                return EINVAL;
                        if (sc->sc_max_contrast > 0) {
                                VPRINTF(("sed1356_ioctl: SET:CONTRAST org=%d",
                                    sc->sc_contrast));
                                sed1356_set_contrast(sc, dispparam->curval);
                                VPRINTF((", current=%d\n", sc->sc_contrast));
                                return 0;
                        }
                        VPRINTF(("sed1356_ioctl: SET:CONTRAST EINVAL\n"));
                        return EINVAL;

                case WSDISPLAYIO_PARAM_BRIGHTNESS:
                        VPRINTF(("sed1356_ioctl: SET:BRIGHTNESS\n"));
                        sed1356_init_brightness(sc, 0);
                        if (dispparam->curval < 0 ||
                            sc->sc_max_brightness < dispparam->curval)
                                return EINVAL;
                        if (sc->sc_max_brightness > 0) {
                                VPRINTF(("sed1356_ioctl: SET:BRIGHTNESS org=%d",
                                    sc->sc_brightness));
                                sed1356_set_brightness(sc, dispparam->curval);
                                VPRINTF((", current=%d\n", sc->sc_brightness));
                                return 0;
                        }
                        VPRINTF(("sed1356_ioctl: SET:BRIGHTNESS EINVAL\n"));
                        return EINVAL;

                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;
}

static paddr_t
sed1356_mmap(void *ctx, off_t offset, int prot)
{
        struct sed1356_softc *sc = (struct sed1356_softc *)ctx;

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

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

static void
sed1356_init_backlight(struct sed1356_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(("sed1356_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
sed1356_init_brightness(struct sed1356_softc *sc, int inattach)
{
        int val = -1;

        if (sc->sc_lcd_inited & BRIGHTNESS_INITED)
                return;

        VPRINTF(("sed1356_init_brightness\n"));
        if (config_hook_call(CONFIG_HOOK_GET,
            CONFIG_HOOK_BRIGHTNESS_MAX, &val) != -1) {
                /* we can get real brightness max */
                VPRINTF(("sed1356_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(("sed1356_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;
        }
}

void
sed1356_init_contrast(struct sed1356_softc *sc, int inattach)
{
        int val = -1;

        if (sc->sc_lcd_inited & CONTRAST_INITED)
                return;

        VPRINTF(("sed1356_init_contrast\n"));
        if (config_hook_call(CONFIG_HOOK_GET,
            CONFIG_HOOK_CONTRAST_MAX, &val) != -1) {
                /* we can get real contrast max */
                VPRINTF(("sed1356_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(("sed1356_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;
        }
}

static void
sed1356_set_brightness(struct sed1356_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;
        }
}

static void
sed1356_set_contrast(struct sed1356_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;
        }
}

void
sed1356_toggle_lcdlight(void)
{
        struct sed1356_softc *sc = device_lookup_private(&sed_cd, 0);

        if (sc->sc_powerstate & PWRSTAT_VIDEOOFF)
                sc->sc_powerstate &= ~PWRSTAT_VIDEOOFF;
        else
                sc->sc_powerstate |= PWRSTAT_VIDEOOFF;

        sed1356_update_powerstate(sc, PWRSTAT_ALL);
}