[mirror_qemu.git] / chardev / char-mux.c

/*
 * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "chardev/char.h"
#include "sysemu/block-backend.h"
#include "chardev/char-mux.h"

/* MUX driver for serial I/O splitting */

/* Called with chr_write_lock held.  */
static int mux_chr_write(Chardev *chr, const uint8_t *buf, int len)
{
    MuxChardev *d = MUX_CHARDEV(chr);
    int ret;
    if (!d->timestamps) {
        ret = qemu_chr_fe_write(&d->chr, buf, len);
    } else {
        int i;

        ret = 0;
        for (i = 0; i < len; i++) {
            if (d->linestart) {
                char buf1[64];
                int64_t ti;
                int secs;

                ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
                if (d->timestamps_start == -1) {
                    d->timestamps_start = ti;
                }
                ti -= d->timestamps_start;
                secs = ti / 1000;
                snprintf(buf1, sizeof(buf1),
                         "[%02d:%02d:%02d.%03d] ",
                         secs / 3600,
                         (secs / 60) % 60,
                         secs % 60,
                         (int)(ti % 1000));
                /* XXX this blocks entire thread. Rewrite to use
                 * qemu_chr_fe_write and background I/O callbacks */
                qemu_chr_fe_write_all(&d->chr,
                                      (uint8_t *)buf1, strlen(buf1));
                d->linestart = 0;
            }
            ret += qemu_chr_fe_write(&d->chr, buf + i, 1);
            if (buf[i] == '\n') {
                d->linestart = 1;
            }
        }
    }
    return ret;
}

static const char * const mux_help[] = {
    "% h    print this help\n\r",
    "% x    exit emulator\n\r",
    "% s    save disk data back to file (if -snapshot)\n\r",
    "% t    toggle console timestamps\n\r",
    "% b    send break (magic sysrq)\n\r",
    "% c    switch between console and monitor\n\r",
    "% %  sends %\n\r",
    NULL
};

int term_escape_char = 0x01; /* ctrl-a is used for escape */
static void mux_print_help(Chardev *chr)
{
    int i, j;
    char ebuf[15] = "Escape-Char";
    char cbuf[50] = "\n\r";

    if (term_escape_char > 0 && term_escape_char < 26) {
        snprintf(cbuf, sizeof(cbuf), "\n\r");
        snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
    } else {
        snprintf(cbuf, sizeof(cbuf),
                 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
                 term_escape_char);
    }
    /* XXX this blocks entire thread. Rewrite to use
     * qemu_chr_fe_write and background I/O callbacks */
    qemu_chr_write_all(chr, (uint8_t *)cbuf, strlen(cbuf));
    for (i = 0; mux_help[i] != NULL; i++) {
        for (j = 0; mux_help[i][j] != '\0'; j++) {
            if (mux_help[i][j] == '%') {
                qemu_chr_write_all(chr, (uint8_t *)ebuf, strlen(ebuf));
            } else {
                qemu_chr_write_all(chr, (uint8_t *)&mux_help[i][j], 1);
            }
        }
    }
}

static void mux_chr_send_event(MuxChardev *d, int mux_nr, int event)
{
    CharBackend *be = d->backends[mux_nr];

    if (be && be->chr_event) {
        be->chr_event(be->opaque, event);
    }
}

static int mux_proc_byte(Chardev *chr, MuxChardev *d, int ch)
{
    if (d->term_got_escape) {
        d->term_got_escape = 0;
        if (ch == term_escape_char) {
            goto send_char;
        }
        switch (ch) {
        case '?':
        case 'h':
            mux_print_help(chr);
            break;
        case 'x':
            {
                 const char *term =  "QEMU: Terminated\n\r";
                 qemu_chr_write_all(chr, (uint8_t *)term, strlen(term));
                 exit(0);
                 break;
            }
        case 's':
            blk_commit_all();
            break;
        case 'b':
            qemu_chr_be_event(chr, CHR_EVENT_BREAK);
            break;
        case 'c':
            assert(d->mux_cnt > 0); /* handler registered with first fe */
            /* Switch to the next registered device */
            mux_set_focus(chr, (d->focus + 1) % d->mux_cnt);
            break;
        case 't':
            d->timestamps = !d->timestamps;
            d->timestamps_start = -1;
            d->linestart = 0;
            break;
        }
    } else if (ch == term_escape_char) {
        d->term_got_escape = 1;
    } else {
    send_char:
        return 1;
    }
    return 0;
}

static void mux_chr_accept_input(Chardev *chr)
{
    MuxChardev *d = MUX_CHARDEV(chr);
    int m = d->focus;
    CharBackend *be = d->backends[m];

    while (be && d->prod[m] != d->cons[m] &&
           be->chr_can_read && be->chr_can_read(be->opaque)) {
        be->chr_read(be->opaque,
                     &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
    }
}

static int mux_chr_can_read(void *opaque)
{
    MuxChardev *d = MUX_CHARDEV(opaque);
    int m = d->focus;
    CharBackend *be = d->backends[m];

    if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) {
        return 1;
    }

    if (be && be->chr_can_read) {
        return be->chr_can_read(be->opaque);
    }

    return 0;
}

static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
{
    Chardev *chr = CHARDEV(opaque);
    MuxChardev *d = MUX_CHARDEV(opaque);
    int m = d->focus;
    CharBackend *be = d->backends[m];
    int i;

    mux_chr_accept_input(opaque);

    for (i = 0; i < size; i++)
        if (mux_proc_byte(chr, d, buf[i])) {
            if (d->prod[m] == d->cons[m] &&
                be && be->chr_can_read &&
                be->chr_can_read(be->opaque)) {
                be->chr_read(be->opaque, &buf[i], 1);
            } else {
                d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
            }
        }
}

bool muxes_realized;

void mux_chr_send_all_event(Chardev *chr, int event)
{
    MuxChardev *d = MUX_CHARDEV(chr);
    int i;

    if (!muxes_realized) {
        return;
    }

    /* Send the event to all registered listeners */
    for (i = 0; i < d->mux_cnt; i++) {
        mux_chr_send_event(d, i, event);
    }
}

static void mux_chr_event(void *opaque, int event)
{
    mux_chr_send_all_event(CHARDEV(opaque), event);
}

static GSource *mux_chr_add_watch(Chardev *s, GIOCondition cond)
{
    MuxChardev *d = MUX_CHARDEV(s);
    Chardev *chr = qemu_chr_fe_get_driver(&d->chr);
    ChardevClass *cc = CHARDEV_GET_CLASS(chr);

    if (!cc->chr_add_watch) {
        return NULL;
    }

    return cc->chr_add_watch(chr, cond);
}

static void char_mux_finalize(Object *obj)
{
    MuxChardev *d = MUX_CHARDEV(obj);
    int i;

    for (i = 0; i < d->mux_cnt; i++) {
        CharBackend *be = d->backends[i];
        if (be) {
            be->chr = NULL;
        }
    }
    qemu_chr_fe_deinit(&d->chr, false);
}

void mux_chr_set_handlers(Chardev *chr, GMainContext *context)
{
    MuxChardev *d = MUX_CHARDEV(chr);

    /* Fix up the real driver with mux routines */
    qemu_chr_fe_set_handlers(&d->chr,
                             mux_chr_can_read,
                             mux_chr_read,
                             mux_chr_event,
                             chr,
                             context, true);
}

void mux_set_focus(Chardev *chr, int focus)
{
    MuxChardev *d = MUX_CHARDEV(chr);

    assert(focus >= 0);
    assert(focus < d->mux_cnt);

    if (d->focus != -1) {
        mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
    }

    d->focus = focus;
    mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
}

static void qemu_chr_open_mux(Chardev *chr,
                              ChardevBackend *backend,
                              bool *be_opened,
                              Error **errp)
{
    ChardevMux *mux = backend->u.mux.data;
    Chardev *drv;
    MuxChardev *d = MUX_CHARDEV(chr);

    drv = qemu_chr_find(mux->chardev);
    if (drv == NULL) {
        error_setg(errp, "mux: base chardev %s not found", mux->chardev);
        return;
    }

    d->focus = -1;
    /* only default to opened state if we've realized the initial
     * set of muxes
     */
    *be_opened = muxes_realized;
    qemu_chr_fe_init(&d->chr, drv, errp);
}

static void qemu_chr_parse_mux(QemuOpts *opts, ChardevBackend *backend,
                               Error **errp)
{
    const char *chardev = qemu_opt_get(opts, "chardev");
    ChardevMux *mux;

    if (chardev == NULL) {
        error_setg(errp, "chardev: mux: no chardev given");
        return;
    }
    backend->type = CHARDEV_BACKEND_KIND_MUX;
    mux = backend->u.mux.data = g_new0(ChardevMux, 1);
    qemu_chr_parse_common(opts, qapi_ChardevMux_base(mux));
    mux->chardev = g_strdup(chardev);
}

static void char_mux_class_init(ObjectClass *oc, void *data)
{
    ChardevClass *cc = CHARDEV_CLASS(oc);

    cc->parse = qemu_chr_parse_mux;
    cc->open = qemu_chr_open_mux;
    cc->chr_write = mux_chr_write;
    cc->chr_accept_input = mux_chr_accept_input;
    cc->chr_add_watch = mux_chr_add_watch;
}

static const TypeInfo char_mux_type_info = {
    .name = TYPE_CHARDEV_MUX,
    .parent = TYPE_CHARDEV,
    .class_init = char_mux_class_init,
    .instance_size = sizeof(MuxChardev),
    .instance_finalize = char_mux_finalize,
};

static void register_types(void)
{
    type_register_static(&char_mux_type_info);
}

type_init(register_types);
Commit	Line	Data
df85a78b MAL	1	/*
	2	* QEMU System Emulator
	3	*
	4	* Copyright (c) 2003-2008 Fabrice Bellard
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24	#include "qemu/osdep.h"
	25	#include "qapi/error.h"
	26	#include "qemu-common.h"
8228e353	27	#include "chardev/char.h"
df85a78b	28	#include "sysemu/block-backend.h"
8228e353	29	#include "chardev/char-mux.h"
df85a78b MAL	30
	31	/* MUX driver for serial I/O splitting */
	32
	33	/* Called with chr_write_lock held. */
	34	static int mux_chr_write(Chardev chr, const uint8_t buf, int len)
	35	{
	36	MuxChardev *d = MUX_CHARDEV(chr);
	37	int ret;
	38	if (!d->timestamps) {
	39	ret = qemu_chr_fe_write(&d->chr, buf, len);
	40	} else {
	41	int i;
	42
	43	ret = 0;
	44	for (i = 0; i < len; i++) {
	45	if (d->linestart) {
	46	char buf1[64];
	47	int64_t ti;
	48	int secs;
	49
	50	ti = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
	51	if (d->timestamps_start == -1) {
	52	d->timestamps_start = ti;
	53	}
	54	ti -= d->timestamps_start;
	55	secs = ti / 1000;
	56	snprintf(buf1, sizeof(buf1),
	57	"[%02d:%02d:%02d.%03d] ",
	58	secs / 3600,
	59	(secs / 60) % 60,
	60	secs % 60,
	61	(int)(ti % 1000));
	62	/* XXX this blocks entire thread. Rewrite to use
	63	* qemu_chr_fe_write and background I/O callbacks */
	64	qemu_chr_fe_write_all(&d->chr,
	65	(uint8_t *)buf1, strlen(buf1));
	66	d->linestart = 0;
	67	}
	68	ret += qemu_chr_fe_write(&d->chr, buf + i, 1);
	69	if (buf[i] == '\n') {
	70	d->linestart = 1;
	71	}
	72	}
	73	}
	74	return ret;
	75	}
	76
	77	static const char * const mux_help[] = {
	78	"% h print this help\n\r",
	79	"% x exit emulator\n\r",
	80	"% s save disk data back to file (if -snapshot)\n\r",
	81	"% t toggle console timestamps\n\r",
	82	"% b send break (magic sysrq)\n\r",
	83	"% c switch between console and monitor\n\r",
	84	"% % sends %\n\r",
	85	NULL
	86	};
	87
	88	int term_escape_char = 0x01; /* ctrl-a is used for escape */
	89	static void mux_print_help(Chardev *chr)
	90	{
	91	int i, j;
	92	char ebuf[15] = "Escape-Char";
	93	char cbuf[50] = "\n\r";
94
95	if (term_escape_char > 0 && term_escape_char < 26) {
96	snprintf(cbuf, sizeof(cbuf), "\n\r");
97	snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
98	} else {
99	snprintf(cbuf, sizeof(cbuf),
100	"\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
101	term_escape_char);
102	}
103	/* XXX this blocks entire thread. Rewrite to use
104	* qemu_chr_fe_write and background I/O callbacks */
105	qemu_chr_write_all(chr, (uint8_t *)cbuf, strlen(cbuf));
106	for (i = 0; mux_help[i] != NULL; i++) {
107	for (j = 0; mux_help[i][j] != '\0'; j++) {
108	if (mux_help[i][j] == '%') {
109	qemu_chr_write_all(chr, (uint8_t *)ebuf, strlen(ebuf));
110	} else {
111	qemu_chr_write_all(chr, (uint8_t *)&mux_help[i][j], 1);
112	}
113	}
114	}
115	}
116
bed3bb9b	117	static void mux_chr_send_event(MuxChardev *d, int mux_nr, int event)
df85a78b MAL	118	{
	119	CharBackend *be = d->backends[mux_nr];
	120
	121	if (be && be->chr_event) {
	122	be->chr_event(be->opaque, event);
	123	}
	124	}
	125
	126	static int mux_proc_byte(Chardev chr, MuxChardev d, int ch)
	127	{
	128	if (d->term_got_escape) {
	129	d->term_got_escape = 0;
	130	if (ch == term_escape_char) {
	131	goto send_char;
	132	}
	133	switch (ch) {
	134	case '?':
	135	case 'h':
	136	mux_print_help(chr);
	137	break;
	138	case 'x':
	139	{
	140	const char *term = "QEMU: Terminated\n\r";
	141	qemu_chr_write_all(chr, (uint8_t *)term, strlen(term));
	142	exit(0);
	143	break;
	144	}
	145	case 's':
	146	blk_commit_all();
	147	break;
	148	case 'b':
	149	qemu_chr_be_event(chr, CHR_EVENT_BREAK);
	150	break;
	151	case 'c':
	152	assert(d->mux_cnt > 0); /* handler registered with first fe */
	153	/* Switch to the next registered device */
	154	mux_set_focus(chr, (d->focus + 1) % d->mux_cnt);
	155	break;
	156	case 't':
	157	d->timestamps = !d->timestamps;
	158	d->timestamps_start = -1;
	159	d->linestart = 0;
	160	break;
	161	}
	162	} else if (ch == term_escape_char) {
	163	d->term_got_escape = 1;
	164	} else {
	165	send_char:
	166	return 1;
	167	}
	168	return 0;
	169	}
	170
	171	static void mux_chr_accept_input(Chardev *chr)
	172	{
	173	MuxChardev *d = MUX_CHARDEV(chr);
	174	int m = d->focus;
	175	CharBackend *be = d->backends[m];
	176
	177	while (be && d->prod[m] != d->cons[m] &&
	178	be->chr_can_read && be->chr_can_read(be->opaque)) {
	179	be->chr_read(be->opaque,
	180	&d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
	181	}
182	}
183
184	static int mux_chr_can_read(void *opaque)
185	{
186	MuxChardev *d = MUX_CHARDEV(opaque);
187	int m = d->focus;
188	CharBackend *be = d->backends[m];
189
190	if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE) {
191	return 1;
192	}
193
194	if (be && be->chr_can_read) {
195	return be->chr_can_read(be->opaque);
196	}
197
198	return 0;
199	}
200
201	static void mux_chr_read(void opaque, const uint8_t buf, int size)
202	{
203	Chardev *chr = CHARDEV(opaque);
204	MuxChardev *d = MUX_CHARDEV(opaque);
205	int m = d->focus;
206	CharBackend *be = d->backends[m];
207	int i;
208
209	mux_chr_accept_input(opaque);
210
211	for (i = 0; i < size; i++)
212	if (mux_proc_byte(chr, d, buf[i])) {
213	if (d->prod[m] == d->cons[m] &&
214	be && be->chr_can_read &&
215	be->chr_can_read(be->opaque)) {
216	be->chr_read(be->opaque, &buf[i], 1);
217	} else {
218	d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
219	}
220	}
221	}
222
223	bool muxes_realized;
224
bed3bb9b	225	void mux_chr_send_all_event(Chardev *chr, int event)
df85a78b	226	{
bed3bb9b	227	MuxChardev *d = MUX_CHARDEV(chr);
df85a78b MAL	228	int i;
	229
	230	if (!muxes_realized) {
	231	return;
	232	}
	233
	234	/* Send the event to all registered listeners */
	235	for (i = 0; i < d->mux_cnt; i++) {
	236	mux_chr_send_event(d, i, event);
	237	}
	238	}
	239
bed3bb9b MAL	240	static void mux_chr_event(void *opaque, int event)
	241	{
	242	mux_chr_send_all_event(CHARDEV(opaque), event);
	243	}
	244
df85a78b MAL	245	static GSource mux_chr_add_watch(Chardev s, GIOCondition cond)
	246	{
	247	MuxChardev *d = MUX_CHARDEV(s);
	248	Chardev *chr = qemu_chr_fe_get_driver(&d->chr);
	249	ChardevClass *cc = CHARDEV_GET_CLASS(chr);
	250
	251	if (!cc->chr_add_watch) {
	252	return NULL;
	253	}
	254
	255	return cc->chr_add_watch(chr, cond);
	256	}
	257
	258	static void char_mux_finalize(Object *obj)
	259	{
	260	MuxChardev *d = MUX_CHARDEV(obj);
	261	int i;
	262
	263	for (i = 0; i < d->mux_cnt; i++) {
	264	CharBackend *be = d->backends[i];
	265	if (be) {
	266	be->chr = NULL;
	267	}
	268	}
1ce2610c	269	qemu_chr_fe_deinit(&d->chr, false);
df85a78b MAL	270	}
	271
	272	void mux_chr_set_handlers(Chardev chr, GMainContext context)
	273	{
	274	MuxChardev *d = MUX_CHARDEV(chr);
	275
	276	/* Fix up the real driver with mux routines */
	277	qemu_chr_fe_set_handlers(&d->chr,
	278	mux_chr_can_read,
	279	mux_chr_read,
	280	mux_chr_event,
	281	chr,
	282	context, true);
	283	}
	284
	285	void mux_set_focus(Chardev *chr, int focus)
	286	{
	287	MuxChardev *d = MUX_CHARDEV(chr);
	288
	289	assert(focus >= 0);
	290	assert(focus < d->mux_cnt);
	291
	292	if (d->focus != -1) {
	293	mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
	294	}
	295
	296	d->focus = focus;
	297	mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
	298	}
	299
	300	static void qemu_chr_open_mux(Chardev *chr,
	301	ChardevBackend *backend,
	302	bool *be_opened,
	303	Error **errp)
	304	{
	305	ChardevMux *mux = backend->u.mux.data;
	306	Chardev *drv;
	307	MuxChardev *d = MUX_CHARDEV(chr);
	308
	309	drv = qemu_chr_find(mux->chardev);
	310	if (drv == NULL) {
	311	error_setg(errp, "mux: base chardev %s not found", mux->chardev);
	312	return;
	313	}
	314
	315	d->focus = -1;
	316	/* only default to opened state if we've realized the initial
	317	* set of muxes
	318	*/
	319	*be_opened = muxes_realized;
	320	qemu_chr_fe_init(&d->chr, drv, errp);
	321	}
	322
	323	static void qemu_chr_parse_mux(QemuOpts opts, ChardevBackend backend,
	324	Error **errp)
	325	{
	326	const char *chardev = qemu_opt_get(opts, "chardev");
	327	ChardevMux *mux;
	328
	329	if (chardev == NULL) {
	330	error_setg(errp, "chardev: mux: no chardev given");
	331	return;
	332	}
	333	backend->type = CHARDEV_BACKEND_KIND_MUX;
334	mux = backend->u.mux.data = g_new0(ChardevMux, 1);
335	qemu_chr_parse_common(opts, qapi_ChardevMux_base(mux));
336	mux->chardev = g_strdup(chardev);
337	}
338
339	static void char_mux_class_init(ObjectClass oc, void data)
340	{
341	ChardevClass *cc = CHARDEV_CLASS(oc);
342
343	cc->parse = qemu_chr_parse_mux;
344	cc->open = qemu_chr_open_mux;
345	cc->chr_write = mux_chr_write;
346	cc->chr_accept_input = mux_chr_accept_input;
347	cc->chr_add_watch = mux_chr_add_watch;
348	}
349
350	static const TypeInfo char_mux_type_info = {
351	.name = TYPE_CHARDEV_MUX,
352	.parent = TYPE_CHARDEV,
353	.class_init = char_mux_class_init,
354	.instance_size = sizeof(MuxChardev),
355	.instance_finalize = char_mux_finalize,
356	};
357
358	static void register_types(void)
359	{
360	type_register_static(&char_mux_type_info);
361	}
362
363	type_init(register_types);