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      1 /* $NetBSD: wsfontdev.c,v 1.20 2022/05/12 23:17:42 uwe Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2001
      5  * 	Matthias Drochner.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions, and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: wsfontdev.c,v 1.20 2022/05/12 23:17:42 uwe Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/conf.h>
     35 #include <sys/fcntl.h>
     36 #include <sys/ioctl.h>
     37 #include <sys/malloc.h>
     38 #include <sys/event.h>
     39 
     40 #include <dev/wsfont/wsfont.h>
     41 #include <dev/wscons/wsconsio.h> /* XXX */
     42 
     43 #include "ioconf.h"
     44 
     45 #ifdef WSFONT_DEBUG
     46 #define DPRINTF printf
     47 #else
     48 #define DPRINTF while (0) printf
     49 #endif
     50 static int wsfont_isopen;
     51 
     52 
     53 void
     54 wsfontattach(int n)
     55 {
     56 
     57 	wsfont_init();
     58 }
     59 
     60 static int
     61 wsfontopen(dev_t dev, int flag, int mode,
     62     struct lwp *l)
     63 {
     64 
     65 	if (wsfont_isopen)
     66 		return (EBUSY);
     67 	wsfont_isopen = 1;
     68 	return (0);
     69 }
     70 
     71 static int
     72 wsfontclose(dev_t dev, int flag, int mode,
     73     struct lwp *l)
     74 {
     75 
     76 	wsfont_isopen = 0;
     77 	return (0);
     78 }
     79 
     80 static void
     81 fontmatchfunc(struct wsdisplay_font *f, void *cookie, int fontcookie)
     82 {
     83 	struct wsdisplayio_fontinfo *fi = cookie;
     84 	struct wsdisplayio_fontdesc fd;
     85 	int offset;
     86 
     87 	DPRINTF("%s %dx%d\n", f->name, f->fontwidth, f->fontheight);
     88 	if (fi->fi_fonts != NULL && fi->fi_buffersize > 0) {
     89 		memset(&fd, 0, sizeof(fd));
     90 		strncpy(fd.fd_name, f->name, sizeof(fd.fd_name) - 1);
     91 		fd.fd_width = f->fontwidth;
     92 		fd.fd_height = f->fontheight;
     93 		offset = sizeof(struct wsdisplayio_fontdesc) * (fi->fi_numentries + 1);
     94 		if (offset > fi->fi_buffersize) {
     95 			fi->fi_fonts = NULL;
     96 		} else
     97 			copyout(&fd, &fi->fi_fonts[fi->fi_numentries],
     98 			    sizeof(struct wsdisplayio_fontdesc));
     99 	}
    100 	fi->fi_numentries++;
    101 }
    102 
    103 static int
    104 wsdisplayio_listfonts(struct wsdisplayio_fontinfo *f)
    105 {
    106 	void *addr = f->fi_fonts;
    107 	DPRINTF("%s: %d %d\n", __func__, f->fi_buffersize, f->fi_numentries);
    108 	f->fi_numentries = 0;
    109 	wsfont_walk(fontmatchfunc, f);
    110 	/* check if we ran out of buffer space */
    111 	if (f->fi_fonts == NULL && addr != NULL) return ENOMEM;
    112 	return 0;
    113 }
    114 
    115 static int
    116 wsfontioctl(dev_t dev, u_long cmd, void *data, int flag,
    117     struct lwp *l)
    118 {
    119 	char nbuf[64];
    120 	void *buf;
    121 	int res;
    122 
    123 	switch (cmd) {
    124 	case WSDISPLAYIO_LDFONT:
    125 #define d ((struct wsdisplay_font *)data)
    126 		if ((flag & FWRITE) == 0)
    127 			return EPERM;
    128 
    129 		if (d->name) {
    130 			res = copyinstr(d->name, nbuf, sizeof(nbuf), 0);
    131 			if (res)
    132 				return (res);
    133 			d->name = nbuf;
    134 		} else
    135 			d->name = "loaded"; /* ??? */
    136 		buf = malloc(d->fontheight * d->stride * d->numchars,
    137 			     M_DEVBUF, M_WAITOK);
    138 		res = copyin(d->data, buf,
    139 			     d->fontheight * d->stride * d->numchars);
    140 		if (res) {
    141 			free(buf, M_DEVBUF);
    142 			return (res);
    143 		}
    144 		d->data = buf;
    145 		res = wsfont_add(d, 1);
    146 		free(buf, M_DEVBUF);
    147 #undef d
    148 		return (res);
    149 	case WSDISPLAYIO_LISTFONTS:
    150 		return wsdisplayio_listfonts(data);
    151 	default:
    152 		return (EINVAL);
    153 	}
    154 }
    155 
    156 const struct cdevsw wsfont_cdevsw = {
    157 	.d_open = wsfontopen,
    158 	.d_close = wsfontclose,
    159 	.d_read = noread,
    160 	.d_write = nowrite,
    161 	.d_ioctl = wsfontioctl,
    162 	.d_stop = nostop,
    163 	.d_tty = notty,
    164 	.d_poll = nopoll,
    165 	.d_mmap = nommap,
    166 	.d_kqfilter = nokqfilter,
    167 	.d_discard = nodiscard,
    168 	.d_flag = D_OTHER
    169 };
    170