/* $NetBSD: wsfontdev.c,v 1.20 2022/05/12 23:17:42 uwe Exp $ */

/*
 * Copyright (c) 2001
 *      Matthias Drochner.  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: wsfontdev.c,v 1.20 2022/05/12 23:17:42 uwe Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/event.h>

#include <dev/wsfont/wsfont.h>
#include <dev/wscons/wsconsio.h> /* XXX */

#include "ioconf.h"

#ifdef WSFONT_DEBUG
#define DPRINTF printf
#else
#define DPRINTF while (0) printf
#endif
static int wsfont_isopen;


void
wsfontattach(int n)
{

        wsfont_init();
}

static int
wsfontopen(dev_t dev, int flag, int mode,
    struct lwp *l)
{

        if (wsfont_isopen)
                return (EBUSY);
        wsfont_isopen = 1;
        return (0);
}

static int
wsfontclose(dev_t dev, int flag, int mode,
    struct lwp *l)
{

        wsfont_isopen = 0;
        return (0);
}

static void
fontmatchfunc(struct wsdisplay_font *f, void *cookie, int fontcookie)
{
        struct wsdisplayio_fontinfo *fi = cookie;
        struct wsdisplayio_fontdesc fd;
        int offset;

        DPRINTF("%s %dx%d\n", f->name, f->fontwidth, f->fontheight);
        if (fi->fi_fonts != NULL && fi->fi_buffersize > 0) {
                memset(&fd, 0, sizeof(fd));
                strncpy(fd.fd_name, f->name, sizeof(fd.fd_name) - 1);
                fd.fd_width = f->fontwidth;
                fd.fd_height = f->fontheight;
                offset = sizeof(struct wsdisplayio_fontdesc) * (fi->fi_numentries + 1);
                if (offset > fi->fi_buffersize) {
                        fi->fi_fonts = NULL;
                } else
                        copyout(&fd, &fi->fi_fonts[fi->fi_numentries],
                            sizeof(struct wsdisplayio_fontdesc));
        }
        fi->fi_numentries++;
}

static int
wsdisplayio_listfonts(struct wsdisplayio_fontinfo *f)
{
        void *addr = f->fi_fonts;
        DPRINTF("%s: %d %d\n", __func__, f->fi_buffersize, f->fi_numentries);
        f->fi_numentries = 0;
        wsfont_walk(fontmatchfunc, f);
        /* check if we ran out of buffer space */
        if (f->fi_fonts == NULL && addr != NULL) return ENOMEM;
        return 0;
}

static int
wsfontioctl(dev_t dev, u_long cmd, void *data, int flag,
    struct lwp *l)
{
        char nbuf[64];
        void *buf;
        int res;

        switch (cmd) {
        case WSDISPLAYIO_LDFONT:
#define d ((struct wsdisplay_font *)data)
                if ((flag & FWRITE) == 0)
                        return EPERM;

                if (d->name) {
                        res = copyinstr(d->name, nbuf, sizeof(nbuf), 0);
                        if (res)
                                return (res);
                        d->name = nbuf;
                } else
                        d->name = "loaded"; /* ??? */
                buf = malloc(d->fontheight * d->stride * d->numchars,
                             M_DEVBUF, M_WAITOK);
                res = copyin(d->data, buf,
                             d->fontheight * d->stride * d->numchars);
                if (res) {
                        free(buf, M_DEVBUF);
                        return (res);
                }
                d->data = buf;
                res = wsfont_add(d, 1);
                free(buf, M_DEVBUF);
#undef d
                return (res);
        case WSDISPLAYIO_LISTFONTS:
                return wsdisplayio_listfonts(data);
        default:
                return (EINVAL);
        }
}

const struct cdevsw wsfont_cdevsw = {
        .d_open = wsfontopen,
        .d_close = wsfontclose,
        .d_read = noread,
        .d_write = nowrite,
        .d_ioctl = wsfontioctl,
        .d_stop = nostop,
        .d_tty = notty,
        .d_poll = nopoll,
        .d_mmap = nommap,
        .d_kqfilter = nokqfilter,
        .d_discard = nodiscard,
        .d_flag = D_OTHER
};