summaryrefslogtreecommitdiff
path: root/sys/dev/usb/ubsa.c
blob: 5e067a3844562b0772ead09977ecfa943b6c9892 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
/*	$OpenBSD: ubsa.c,v 1.9 2005/01/16 04:53:00 dlg Exp $ 	*/
/*	$NetBSD: ubsa.c,v 1.5 2002/11/25 00:51:33 fvdl Exp $	*/
/*-
 * Copyright (c) 2002, Alexander Kabaev <kan.FreeBSD.org>.
 * 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.
 */
/*
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Ichiro FUKUHARA (ichiro@ichiro.org).
 *
 * 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 NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#if defined(__OpenBSD__)
#include <sys/device.h>
#elif defined(__FreeBSD__)
#include <sys/bus.h>
#endif
#include <sys/ioccom.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/file.h>
#if __FreeBSD_version >= 500014
#include <sys/selinfo.h>
#else
#include <sys/select.h>
#endif
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/poll.h>
#include <sys/sysctl.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbcdc.h>

#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/usb_quirks.h>

#include <dev/usb/ucomvar.h>

#ifdef USB_DEBUG
#define UBSA_DEBUG
#endif

#ifdef UBSA_DEBUG
Static int	ubsadebug = 0;
#ifdef __FreeBSD__
SYSCTL_NODE(_hw_usb, OID_AUTO, ubsa, CTLFLAG_RW, 0, "USB ubsa");
SYSCTL_INT(_hw_usb_ubsa, OID_AUTO, debug, CTLFLAG_RW,
	   &ubsadebug, 0, "ubsa debug level");
#endif

#define	DPRINTFN(n, x)	do { if (ubsadebug > (n)) logprintf x; } while (0)
#else
#define	DPRINTFN(n, x)
#endif
#define	DPRINTF(x) DPRINTFN(0, x)

#define	UBSA_MODVER		1	/* module version */

#define	UBSA_CONFIG_INDEX	1
#define	UBSA_IFACE_INDEX	0

#define	UBSA_INTR_INTERVAL	100	/* ms */

#define	UBSA_SET_BAUDRATE  	0x00
#define	UBSA_SET_STOP_BITS	0x01
#define	UBSA_SET_DATA_BITS	0x02
#define	UBSA_SET_PARITY		0x03
#define	UBSA_SET_DTR		0x0A
#define	UBSA_SET_RTS		0x0B
#define	UBSA_SET_BREAK		0x0C
#define	UBSA_SET_FLOW_CTRL	0x10

#define	UBSA_PARITY_NONE	0x00
#define	UBSA_PARITY_EVEN	0x01
#define	UBSA_PARITY_ODD		0x02
#define	UBSA_PARITY_MARK	0x03
#define	UBSA_PARITY_SPACE	0x04

#define	UBSA_FLOW_NONE		0x0000
#define	UBSA_FLOW_OCTS		0x0001
#define	UBSA_FLOW_ODSR		0x0002
#define	UBSA_FLOW_IDSR		0x0004
#define	UBSA_FLOW_IDTR		0x0008
#define	UBSA_FLOW_IRTS		0x0010
#define	UBSA_FLOW_ORTS		0x0020
#define	UBSA_FLOW_UNKNOWN	0x0040
#define	UBSA_FLOW_OXON		0x0080
#define	UBSA_FLOW_IXON		0x0100

/* line status register */
#define	UBSA_LSR_TSRE		0x40	/* Transmitter empty: byte sent */
#define	UBSA_LSR_TXRDY		0x20	/* Transmitter buffer empty */
#define	UBSA_LSR_BI		0x10	/* Break detected */
#define	UBSA_LSR_FE		0x08	/* Framing error: bad stop bit */
#define	UBSA_LSR_PE		0x04	/* Parity error */
#define	UBSA_LSR_OE		0x02	/* Overrun, lost incoming byte */
#define	UBSA_LSR_RXRDY		0x01	/* Byte ready in Receive Buffer */
#define	UBSA_LSR_RCV_MASK	0x1f	/* Mask for incoming data or error */

/* modem status register */
/* All deltas are from the last read of the MSR. */
#define	UBSA_MSR_DCD		0x80	/* Current Data Carrier Detect */
#define	UBSA_MSR_RI		0x40	/* Current Ring Indicator */
#define	UBSA_MSR_DSR		0x20	/* Current Data Set Ready */
#define	UBSA_MSR_CTS		0x10	/* Current Clear to Send */
#define	UBSA_MSR_DDCD		0x08	/* DCD has changed state */
#define	UBSA_MSR_TERI		0x04	/* RI has toggled low to high */
#define	UBSA_MSR_DDSR		0x02	/* DSR has changed state */
#define	UBSA_MSR_DCTS		0x01	/* CTS has changed state */

struct	ubsa_softc {
	USBBASEDEVICE		sc_dev;		/* base device */
	usbd_device_handle	sc_udev;	/* USB device */
	usbd_interface_handle	sc_iface;	/* interface */

	int			sc_iface_number;	/* interface number */

	usbd_interface_handle	sc_intr_iface;	/* interrupt interface */
	int			sc_intr_number;	/* interrupt number */
	usbd_pipe_handle	sc_intr_pipe;	/* interrupt pipe */
	u_char			*sc_intr_buf;	/* interrupt buffer */
	int			sc_isize;

	u_char			sc_dtr;		/* current DTR state */
	u_char			sc_rts;		/* current RTS state */

	u_char			sc_lsr;		/* Local status register */
	u_char			sc_msr;		/* ubsa status register */

	device_ptr_t		sc_subdev;	/* ucom device */

	u_char			sc_dying;	/* disconnecting */

};

Static	void ubsa_intr(usbd_xfer_handle, usbd_private_handle, usbd_status);

Static	void ubsa_get_status(void *, int, u_char *, u_char *);
Static	void ubsa_set(void *, int, int, int);
Static	int  ubsa_param(void *, int, struct termios *);
Static	int  ubsa_open(void *, int);
Static	void ubsa_close(void *, int);

Static  void ubsa_break(struct ubsa_softc *sc, int onoff);
Static	int  ubsa_request(struct ubsa_softc *, u_int8_t, u_int16_t);
Static	void ubsa_dtr(struct ubsa_softc *, int);
Static	void ubsa_rts(struct ubsa_softc *, int);
Static	void ubsa_baudrate(struct ubsa_softc *, speed_t);
Static	void ubsa_parity(struct ubsa_softc *, tcflag_t);
Static	void ubsa_databits(struct ubsa_softc *, tcflag_t);
Static	void ubsa_stopbits(struct ubsa_softc *, tcflag_t);
Static	void ubsa_flow(struct ubsa_softc *, tcflag_t, tcflag_t);

struct	ucom_methods ubsa_methods = {
	ubsa_get_status,
	ubsa_set,
	ubsa_param,
	NULL,
	ubsa_open,
	ubsa_close,
	NULL,
	NULL
};

Static const struct usb_devno ubsa_devs[] = {
	/* BELKIN F5U103 */
	{ USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U103 },
	/* BELKIN F5U120 */
	{ USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U120 },
	/* GoHubs GO-COM232 */
	{ USB_VENDOR_ETEK, USB_PRODUCT_ETEK_1COM },
	/* GoHubs GO-COM232 */
	{ USB_VENDOR_GOHUBS, USB_PRODUCT_GOHUBS_GOCOM232 },
	/* Peracom */
	{ USB_VENDOR_PERACOM, USB_PRODUCT_PERACOM_SERIAL1 },
	/* Vodafone */
	{ USB_VENDOR_VODAFONE, USB_PRODUCT_VODAFONE_MOBILE_3G }
};
#define ubsa_lookup(v, p) usb_lookup(ubsa_devs, v, p)

USB_DECLARE_DRIVER(ubsa);

USB_MATCH(ubsa)
{
	USB_MATCH_START(ubsa, uaa);

	if (uaa->iface != NULL)
		return (UMATCH_NONE);

	return (ubsa_lookup(uaa->vendor, uaa->product) != NULL ?
		UMATCH_VENDOR_PRODUCT : UMATCH_NONE);
}

USB_ATTACH(ubsa)
{
	USB_ATTACH_START(ubsa, sc, uaa);
	usbd_device_handle dev = uaa->device;
	usb_config_descriptor_t *cdesc;
	usb_interface_descriptor_t *id;
	usb_endpoint_descriptor_t *ed;
	char devinfo[1024];
	const char *devname = USBDEVNAME(sc->sc_dev);
	usbd_status err;
	struct ucom_attach_args uca;
	int i;

        usbd_devinfo(dev, 0, devinfo, sizeof devinfo);
        USB_ATTACH_SETUP;
        printf("%s: %s\n", devname, devinfo);

        sc->sc_udev = dev;

	/*
	 * initialize rts, dtr variables to something
	 * different from boolean 0, 1
	 */
	sc->sc_dtr = -1;
	sc->sc_rts = -1;

	DPRINTF(("ubsa attach: sc = %p\n", sc));

	/* initialize endpoints */
	uca.bulkin = uca.bulkout = -1;
	sc->sc_intr_number = -1;
	sc->sc_intr_pipe = NULL;

	/* Move the device into the configured state. */
	err = usbd_set_config_index(dev, UBSA_CONFIG_INDEX, 1);
	if (err) {
		printf("%s: failed to set configuration: %s\n",
		    devname, usbd_errstr(err));
		sc->sc_dying = 1;
		goto error;
	}

	/* get the config descriptor */
	cdesc = usbd_get_config_descriptor(sc->sc_udev);

	if (cdesc == NULL) {
		printf("%s: failed to get configuration descriptor\n",
		    devname);
		sc->sc_dying = 1;
		goto error;
	}

	/* get the first interface */
	err = usbd_device2interface_handle(dev, UBSA_IFACE_INDEX,
	    &sc->sc_iface);
	if (err) {
		printf("%s: failed to get interface: %s\n",
			devname, usbd_errstr(err));
		sc->sc_dying = 1;
		goto error;
	}

	/* Find the endpoints */

	id = usbd_get_interface_descriptor(sc->sc_iface);
	sc->sc_iface_number = id->bInterfaceNumber;

	for (i = 0; i < id->bNumEndpoints; i++) {
		ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
		if (ed == NULL) {
			printf("%s: no endpoint descriptor for %d\n",
			    USBDEVNAME(sc->sc_dev), i);
			sc->sc_dying = 1;
			goto error;
		}

		if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
			sc->sc_intr_number = ed->bEndpointAddress;
			sc->sc_isize = UGETW(ed->wMaxPacketSize);
		} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
			uca.bulkin = ed->bEndpointAddress;
			uca.ibufsize = UGETW(ed->wMaxPacketSize);
		} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
			uca.bulkout = ed->bEndpointAddress;
			uca.obufsize = UGETW(ed->wMaxPacketSize);
		}
	}

	if (sc->sc_intr_number == -1) {
		printf("%s: Could not find interrupt in\n", devname);
		sc->sc_dying = 1;
		goto error;
	}

	/* keep interface for interrupt */
	sc->sc_intr_iface = sc->sc_iface;

	if (uca.bulkin == -1) {
		printf("%s: Could not find data bulk in\n", devname);
		sc->sc_dying = 1;
		goto error;
	}

	if (uca.bulkout == -1) {
		printf("%s: Could not find data bulk out\n", devname);
		sc->sc_dying = 1;
		goto error;
	}

	uca.portno = UCOM_UNK_PORTNO;
	/* bulkin, bulkout set above */
	uca.ibufsizepad = uca.ibufsize;
	uca.opkthdrlen = 0;
	uca.device = dev;
	uca.iface = sc->sc_iface;
	uca.methods = &ubsa_methods;
	uca.arg = sc;
	uca.info = NULL;

	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
			   USBDEV(sc->sc_dev));

	DPRINTF(("ubsa: in = 0x%x, out = 0x%x, intr = 0x%x\n",
	    uca.bulkin, uca.bulkout, sc->sc_intr_number));

	sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch);

	USB_ATTACH_SUCCESS_RETURN;

error:
	USB_ATTACH_ERROR_RETURN;
}

USB_DETACH(ubsa)
{
	USB_DETACH_START(ubsa, sc);
	int rv = 0;


	DPRINTF(("ubsa_detach: sc = %p\n", sc));

	if (sc->sc_intr_pipe != NULL) {
		usbd_abort_pipe(sc->sc_intr_pipe);
		usbd_close_pipe(sc->sc_intr_pipe);
		free(sc->sc_intr_buf, M_USBDEV);
		sc->sc_intr_pipe = NULL;
	}

	sc->sc_dying = 1;
	if (sc->sc_subdev != NULL) {
		rv = config_detach(sc->sc_subdev, flags);
		sc->sc_subdev = NULL;
	}

	usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
			   USBDEV(sc->sc_dev));

	return (rv);
}

int
ubsa_activate(device_ptr_t self, enum devact act)
{
	struct ubsa_softc *sc = (struct ubsa_softc *)self;
	int rv = 0;

	switch (act) {
	case DVACT_ACTIVATE:
		return (EOPNOTSUPP);

	case DVACT_DEACTIVATE:
		if (sc->sc_subdev != NULL)
			rv = config_deactivate(sc->sc_subdev);
		sc->sc_dying = 1;
		break;
	}
	return (rv);
}

Static int
ubsa_request(struct ubsa_softc *sc, u_int8_t request, u_int16_t value)
{
	usb_device_request_t req;
	usbd_status err;

	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = request;
	USETW(req.wValue, value);
	USETW(req.wIndex, sc->sc_iface_number);
	USETW(req.wLength, 0);

	err = usbd_do_request(sc->sc_udev, &req, 0);
	if (err)
		printf("%s: ubsa_request: %s\n",
		    USBDEVNAME(sc->sc_dev), usbd_errstr(err));
	return (err);
}

Static void
ubsa_dtr(struct ubsa_softc *sc, int onoff)
{

	DPRINTF(("ubsa_dtr: onoff = %d\n", onoff));

	if (sc->sc_dtr == onoff)
		return;
	sc->sc_dtr = onoff;

	ubsa_request(sc, UBSA_SET_DTR, onoff ? 1 : 0);
}

Static void
ubsa_rts(struct ubsa_softc *sc, int onoff)
{

	DPRINTF(("ubsa_rts: onoff = %d\n", onoff));

	if (sc->sc_rts == onoff)
		return;
	sc->sc_rts = onoff;

	ubsa_request(sc, UBSA_SET_RTS, onoff ? 1 : 0);
}

Static void
ubsa_break(struct ubsa_softc *sc, int onoff)
{

	DPRINTF(("ubsa_rts: onoff = %d\n", onoff));

	ubsa_request(sc, UBSA_SET_BREAK, onoff ? 1 : 0);
}

Static void
ubsa_set(void *addr, int portno, int reg, int onoff)
{
	struct ubsa_softc *sc;

	sc = addr;
	switch (reg) {
	case UCOM_SET_DTR:
		ubsa_dtr(sc, onoff);
		break;
	case UCOM_SET_RTS:
		ubsa_rts(sc, onoff);
		break;
	case UCOM_SET_BREAK:
		ubsa_break(sc, onoff);
		break;
	default:
		break;
	}
}

Static void
ubsa_baudrate(struct ubsa_softc *sc, speed_t speed)
{
	u_int16_t value = 0;

	DPRINTF(("ubsa_baudrate: speed = %d\n", speed));

	switch(speed) {
	case B0:
		break;
	case B300:
	case B600:
	case B1200:
	case B2400:
	case B4800:
	case B9600:
	case B19200:
	case B38400:
	case B57600:
	case B115200:
	case B230400:
		value = B230400 / speed;
		break;
	default:
		printf("%s: ubsa_param: unsupported baudrate, "
		    "forcing default of 9600\n",
		    USBDEVNAME(sc->sc_dev));
		value = B230400 / B9600;
		break;
	};

	if (speed == B0) {
		ubsa_flow(sc, 0, 0);
		ubsa_dtr(sc, 0);
		ubsa_rts(sc, 0);
	} else
		ubsa_request(sc, UBSA_SET_BAUDRATE, value);
}

Static void
ubsa_parity(struct ubsa_softc *sc, tcflag_t cflag)
{
	int value;

	DPRINTF(("ubsa_parity: cflag = 0x%x\n", cflag));

	if (cflag & PARENB)
		value = (cflag & PARODD) ? UBSA_PARITY_ODD : UBSA_PARITY_EVEN;
	else
		value = UBSA_PARITY_NONE;

	ubsa_request(sc, UBSA_SET_PARITY, value);
}

Static void
ubsa_databits(struct ubsa_softc *sc, tcflag_t cflag)
{
	int value;

	DPRINTF(("ubsa_databits: cflag = 0x%x\n", cflag));

	switch (cflag & CSIZE) {
	case CS5: value = 0; break;
	case CS6: value = 1; break;
	case CS7: value = 2; break;
	case CS8: value = 3; break;
	default:
		printf("%s: ubsa_param: unsupported databits requested, "
		    "forcing default of 8\n",
		    USBDEVNAME(sc->sc_dev));
		value = 3;
	}

	ubsa_request(sc, UBSA_SET_DATA_BITS, value);
}

Static void
ubsa_stopbits(struct ubsa_softc *sc, tcflag_t cflag)
{
	int value;

	DPRINTF(("ubsa_stopbits: cflag = 0x%x\n", cflag));

	value = (cflag & CSTOPB) ? 1 : 0;

	ubsa_request(sc, UBSA_SET_STOP_BITS, value);
}

Static void
ubsa_flow(struct ubsa_softc *sc, tcflag_t cflag, tcflag_t iflag)
{
	int value;

	DPRINTF(("ubsa_flow: cflag = 0x%x, iflag = 0x%x\n", cflag, iflag));

	value = 0;
	if (cflag & CRTSCTS)
		value |= UBSA_FLOW_OCTS | UBSA_FLOW_IRTS;
	if (iflag & (IXON|IXOFF))
		value |= UBSA_FLOW_OXON | UBSA_FLOW_IXON;

	ubsa_request(sc, UBSA_SET_FLOW_CTRL, value);
}

Static int
ubsa_param(void *addr, int portno, struct termios *ti)
{
	struct ubsa_softc *sc = addr;

	DPRINTF(("ubsa_param: sc = %p\n", sc));

	ubsa_baudrate(sc, ti->c_ospeed);
	ubsa_parity(sc, ti->c_cflag);
	ubsa_databits(sc, ti->c_cflag);
	ubsa_stopbits(sc, ti->c_cflag);
	ubsa_flow(sc, ti->c_cflag, ti->c_iflag);

	return (0);
}

Static int
ubsa_open(void *addr, int portno)
{
	struct ubsa_softc *sc = addr;
	int err;

	if (sc->sc_dying)
		return (ENXIO);

	DPRINTF(("ubsa_open: sc = %p\n", sc));

	if (sc->sc_intr_number != -1 && sc->sc_intr_pipe == NULL) {
		sc->sc_intr_buf = malloc(sc->sc_isize, M_USBDEV, M_WAITOK);
		err = usbd_open_pipe_intr(sc->sc_intr_iface,
		    sc->sc_intr_number,
		    USBD_SHORT_XFER_OK,
		    &sc->sc_intr_pipe,
		    sc,
		    sc->sc_intr_buf,
		    sc->sc_isize,
		    ubsa_intr,
		    UBSA_INTR_INTERVAL);
		if (err) {
			printf("%s: cannot open interrupt pipe (addr %d)\n",
			    USBDEVNAME(sc->sc_dev),
			    sc->sc_intr_number);
			return (EIO);
		}
	}

	return (0);
}

Static void
ubsa_close(void *addr, int portno)
{
	struct ubsa_softc *sc = addr;
	int err;

	if (sc->sc_dying)
		return;

	DPRINTF(("ubsa_close: close\n"));

	if (sc->sc_intr_pipe != NULL) {
		err = usbd_abort_pipe(sc->sc_intr_pipe);
		if (err)
			printf("%s: abort interrupt pipe failed: %s\n",
			    USBDEVNAME(sc->sc_dev),
			    usbd_errstr(err));
		err = usbd_close_pipe(sc->sc_intr_pipe);
		if (err)
			printf("%s: close interrupt pipe failed: %s\n",
			    USBDEVNAME(sc->sc_dev),
			    usbd_errstr(err));
		free(sc->sc_intr_buf, M_USBDEV);
		sc->sc_intr_pipe = NULL;
	}
}

Static void
ubsa_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
	struct ubsa_softc *sc = priv;
	u_char *buf;

	buf = sc->sc_intr_buf;
	if (sc->sc_dying)
		return;

	if (status != USBD_NORMAL_COMPLETION) {
		if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
			return;

		DPRINTF(("%s: ubsa_intr: abnormal status: %s\n",
		    USBDEVNAME(sc->sc_dev), usbd_errstr(status)));
		usbd_clear_endpoint_stall_async(sc->sc_intr_pipe);
		return;
	}

	/* incidentally, Belkin adapter status bits match UART 16550 bits */
	sc->sc_lsr = buf[2];
	sc->sc_msr = buf[3];

	DPRINTF(("%s: ubsa lsr = 0x%02x, msr = 0x%02x\n",
	    USBDEVNAME(sc->sc_dev), sc->sc_lsr, sc->sc_msr));

	ucom_status_change((struct ucom_softc *)sc->sc_subdev);
}

Static void
ubsa_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
{
	struct ubsa_softc *sc = addr;

	DPRINTF(("ubsa_get_status\n"));

	if (lsr != NULL)
		*lsr = sc->sc_lsr;
	if (msr != NULL)
		*msr = sc->sc_msr;
}