summaryrefslogtreecommitdiff
path: root/sys/dev/usb/uticom.c
blob: b0858bbaf3044579e01cc315fc970303091fd212 (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
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
/*	$OpenBSD: uticom.c,v 1.28 2015/12/11 16:07:02 mpi Exp $	*/
/*
 * Copyright (c) 2005 Dmitry Komissaroff <dxi@mail.ru>.
 *
 * 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/tty.h>

#include <machine/bus.h>

#include <dev/usb/usb.h>

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

#include <dev/usb/ucomvar.h>

#ifdef UTICOM_DEBUG
static int uticomdebug = 0;
#define DPRINTFN(n, x)	do { if (uticomdebug > (n)) printf x; } while (0)
#else
#define DPRINTFN(n, x)
#endif

#define DPRINTF(x) DPRINTFN(0, x)

#define	UTICOM_CONFIG_INDEX	1
#define	UTICOM_ACTIVE_INDEX	2

#define	UTICOM_IFACE_INDEX	0

/*
 * These are the maximum number of bytes transferred per frame.
 * The output buffer size cannot be increased due to the size encoding.
 */
#define UTICOM_IBUFSZ		64
#define UTICOM_OBUFSZ		64

#define UTICOM_FW_BUFSZ		16284

#define UTICOM_INTR_INTERVAL	100	/* ms */

#define UTICOM_RQ_LINE		0
/* Used to sync data0/1-toggle on reopen bulk pipe. */
#define UTICOM_RQ_SOF		1
#define UTICOM_RQ_SON		2

#define UTICOM_RQ_BAUD		3
#define UTICOM_RQ_LCR		4
#define UTICOM_RQ_FCR		5
#define UTICOM_RQ_RTS		6
#define UTICOM_RQ_DTR		7
#define UTICOM_RQ_BREAK		8
#define UTICOM_RQ_CRTSCTS	9

#define UTICOM_BRATE_REF	923077

#define UTICOM_SET_DATA_BITS(x)	(x - 5)

#define UTICOM_STOP_BITS_1	0x00
#define UTICOM_STOP_BITS_2	0x40

#define UTICOM_PARITY_NONE	0x00
#define UTICOM_PARITY_ODD	0x08
#define UTICOM_PARITY_EVEN	0x18

#define UTICOM_LCR_OVR		0x1
#define UTICOM_LCR_PTE		0x2
#define UTICOM_LCR_FRE		0x4
#define UTICOM_LCR_BRK		0x8

#define UTICOM_MCR_CTS		0x1
#define UTICOM_MCR_DSR		0x2
#define UTICOM_MCR_CD		0x4
#define UTICOM_MCR_RI		0x8

/* Structures */
struct uticom_fw_header {
	uint16_t	length;
	uint8_t		checkSum;
} __packed;

struct uticom_buf {
	unsigned int		buf_size;
	char			*buf_buf;
	char			*buf_get;
	char			*buf_put;
};

struct	uticom_softc {
	struct device		 sc_dev;	/* base device */
	struct usbd_device	*sc_udev;	/* device */
	struct usbd_interface	*sc_iface;	/* interface */

	int			sc_iface_number; /* interface number */

	struct usbd_interface	*sc_intr_iface;	/* interrupt interface */
	int			sc_intr_number;	/* interrupt number */
	struct usbd_pipe	*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_status;

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

	struct device		*sc_subdev;
};

static	usbd_status uticom_reset(struct uticom_softc *);
static	usbd_status uticom_set_crtscts(struct uticom_softc *);
static	void uticom_intr(struct usbd_xfer *, void *, usbd_status);

static	void uticom_set(void *, int, int, int);
static	void uticom_dtr(struct uticom_softc *, int);
static	void uticom_rts(struct uticom_softc *, int);
static	void uticom_break(struct uticom_softc *, int);
static	void uticom_get_status(void *, int, u_char *, u_char *);
#if 0 /* TODO */
static	int  uticom_ioctl(void *, int, u_long, caddr_t, int, usb_proc_ptr);
#endif
static	int  uticom_param(void *, int, struct termios *);
static	int  uticom_open(void *, int);
static	void uticom_close(void *, int);

void uticom_attach_hook(struct device *);

static int uticom_download_fw(struct uticom_softc *sc, int pipeno,
    struct usbd_device *dev);

struct ucom_methods uticom_methods = {
	uticom_get_status,
	uticom_set,
	uticom_param,
	NULL, /* uticom_ioctl, TODO */
	uticom_open,
	uticom_close,
	NULL,
	NULL
};

int	uticom_match(struct device *, void *, void *);
void	uticom_attach(struct device *, struct device *, void *);
int	uticom_detach(struct device *, int);

struct cfdriver uticom_cd = {
	NULL, "uticom", DV_DULL
};

const struct cfattach uticom_ca = {
	sizeof(struct uticom_softc), uticom_match, uticom_attach, uticom_detach
};

static const struct usb_devno uticom_devs[] = {
	{ USB_VENDOR_TI, USB_PRODUCT_TI_TUSB3410 },
	{ USB_VENDOR_TI, USB_PRODUCT_TI_MSP430_JTAG },
	{ USB_VENDOR_STARTECH, USB_PRODUCT_STARTECH_ICUSB232X },
	{ USB_VENDOR_MOXA, USB_PRODUCT_MOXA_UPORT1110 },
	{ USB_VENDOR_ABBOTT, USB_PRODUCT_ABBOTT_STEREO_PLUG }
};

int
uticom_match(struct device *parent, void *match, void *aux)
{
	struct usb_attach_arg *uaa = aux;

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

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

void
uticom_attach(struct device *parent, struct device *self, void *aux)
{
	struct uticom_softc	*sc = (struct uticom_softc *)self;
	struct usb_attach_arg	*uaa = aux;
	struct usbd_device	*dev = uaa->device;

	sc->sc_udev = dev;
	sc->sc_iface = uaa->iface;

	config_mountroot(self, uticom_attach_hook);
}

void
uticom_attach_hook(struct device *self)
{
	struct uticom_softc		*sc = (struct uticom_softc *)self;
	usb_config_descriptor_t		*cdesc;
	usb_interface_descriptor_t	*id;
	usb_endpoint_descriptor_t	*ed;
	usbd_status			 err;
	int				 status, i;
	usb_device_descriptor_t		*dd;
	struct ucom_attach_args		 uca;

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

	dd = usbd_get_device_descriptor(sc->sc_udev);
	DPRINTF(("%s: uticom_attach: num of configurations %d\n",
	    sc->sc_dev.dv_xname, dd->bNumConfigurations));

	/* The device without firmware has single configuration with single
	 * bulk out interface. */
	if (dd->bNumConfigurations > 1)
		goto fwload_done;

	/* Loading firmware. */
	DPRINTF(("%s: uticom_attach: starting loading firmware\n",
	    sc->sc_dev.dv_xname));

	err = usbd_set_config_index(sc->sc_udev, UTICOM_CONFIG_INDEX, 1);
	if (err) {
		printf("%s: failed to set configuration: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		usbd_deactivate(sc->sc_udev);
		return;
	}

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

	if (cdesc == NULL) {
		printf("%s: failed to get configuration descriptor\n",
		    sc->sc_dev.dv_xname);
		usbd_deactivate(sc->sc_udev);
		return;
	}

	err = usbd_device2interface_handle(sc->sc_udev, UTICOM_IFACE_INDEX,
	    &sc->sc_iface);
	if (err) {
		printf("%s: failed to get interface: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		usbd_deactivate(sc->sc_udev);
		return;
	}

	/* Find the bulk out interface used to upload firmware. */
	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",
			    sc->sc_dev.dv_xname, i);
			usbd_deactivate(sc->sc_udev);
			return;
		}

		if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
			uca.bulkout = ed->bEndpointAddress;
			DPRINTF(("%s: uticom_attach: data bulk out num: %d\n",
			    sc->sc_dev.dv_xname, ed->bEndpointAddress));
		}

		if (uca.bulkout == -1) {
			printf("%s: could not find data bulk out\n",
			    sc->sc_dev.dv_xname);
			usbd_deactivate(sc->sc_udev);
			return;
		}
	}

	status = uticom_download_fw(sc, uca.bulkout, sc->sc_udev);

	if (status) {
		printf("%s: firmware download failed\n",
		    sc->sc_dev.dv_xname);
		usbd_deactivate(sc->sc_udev);
		return;
	} else {
		DPRINTF(("%s: firmware download succeeded\n",
		    sc->sc_dev.dv_xname));
	}

	status = usbd_reload_device_desc(sc->sc_udev);
	if (status) {
		printf("%s: error reloading device descriptor\n",
		    sc->sc_dev.dv_xname);
		usbd_deactivate(sc->sc_udev);
		return;
	}

fwload_done:
	dd = usbd_get_device_descriptor(sc->sc_udev);
	DPRINTF(("%s: uticom_attach: num of configurations %d\n",
	    sc->sc_dev.dv_xname, dd->bNumConfigurations));

	err = usbd_set_config_index(sc->sc_udev, UTICOM_ACTIVE_INDEX, 1);
	if (err) {
		printf("%s: failed to set configuration: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		usbd_deactivate(sc->sc_udev);
		return;
	}

	/* Get the config descriptor. */
	cdesc = usbd_get_config_descriptor(sc->sc_udev);
	if (cdesc == NULL) {
		printf("%s: failed to get configuration descriptor\n",
		    sc->sc_dev.dv_xname);
		usbd_deactivate(sc->sc_udev);
		return;
	}

	/* Get the interface (XXX: multiport chips are not supported yet). */
	err = usbd_device2interface_handle(sc->sc_udev, UTICOM_IFACE_INDEX,
	    &sc->sc_iface);
	if (err) {
		printf("%s: failed to get interface: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		usbd_deactivate(sc->sc_udev);
		return;
	}

	/* Find the interrupt 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",
			    sc->sc_dev.dv_xname, i);
			usbd_deactivate(sc->sc_udev);
			return;
		}

		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);

		}
	}

	if (sc->sc_intr_number == -1) {
		printf("%s: could not find interrupt in\n",
		    sc->sc_dev.dv_xname);
		usbd_deactivate(sc->sc_udev);
		return;
	}

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

	/* Find the bulk{in,out} 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",
			    sc->sc_dev.dv_xname, i);
			usbd_deactivate(sc->sc_udev);
			return;
		}

		if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
			uca.bulkin = ed->bEndpointAddress;
		} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
			uca.bulkout = ed->bEndpointAddress;
		}
	}

	if (uca.bulkin == -1) {
		printf("%s: could not find data bulk in\n",
		    sc->sc_dev.dv_xname);
		usbd_deactivate(sc->sc_udev);
		return;
	}

	if (uca.bulkout == -1) {
		printf("%s: could not find data bulk out\n",
		    sc->sc_dev.dv_xname);
		usbd_deactivate(sc->sc_udev);
		return;
	}

	sc->sc_dtr = sc->sc_rts = -1;

	uca.portno = UCOM_UNK_PORTNO;
	uca.ibufsize = UTICOM_IBUFSZ;
	uca.obufsize = UTICOM_OBUFSZ;
	uca.ibufsizepad = UTICOM_IBUFSZ;
	uca.device = sc->sc_udev;
	uca.iface = sc->sc_iface;
	uca.opkthdrlen = 0;
	uca.methods = &uticom_methods;
	uca.arg = sc;
	uca.info = NULL;

	err = uticom_reset(sc);
	if (err) {
		printf("%s: reset failed: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		usbd_deactivate(sc->sc_udev);
		return;
	}

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

	sc->sc_subdev = config_found_sm((struct device *)sc, &uca, ucomprint, ucomsubmatch);
}

int
uticom_detach(struct device *self, int flags)
{
	struct uticom_softc *sc = (struct uticom_softc *)self;

	DPRINTF(("%s: uticom_detach: sc = %p\n",
	    sc->sc_dev.dv_xname, sc));

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

	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, 0);
		sc->sc_intr_pipe = NULL;
	}

	return (0);
}

static usbd_status
uticom_reset(struct uticom_softc *sc)
{
	usb_device_request_t req;
	usbd_status err;

	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = UTICOM_RQ_SON;
	USETW(req.wValue, 0);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);

	err = usbd_do_request(sc->sc_udev, &req, NULL);
	if (err){
		printf("%s: uticom_reset: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		return (EIO);
	}

	DPRINTF(("%s: uticom_reset: done\n", sc->sc_dev.dv_xname));
	return (0);
}

static void
uticom_set(void *addr, int portno, int reg, int onoff)
{
	struct uticom_softc *sc = addr;

	switch (reg) {
	case UCOM_SET_DTR:
		uticom_dtr(sc, onoff);
		break;
	case UCOM_SET_RTS:
		uticom_rts(sc, onoff);
		break;
	case UCOM_SET_BREAK:
		uticom_break(sc, onoff);
		break;
	default:
		break;
	}
}

static void
uticom_dtr(struct uticom_softc *sc, int onoff)
{
	usb_device_request_t req;
	usbd_status err;

	DPRINTF(("%s: uticom_dtr: onoff = %d\n", sc->sc_dev.dv_xname,
	    onoff));

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

	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = UTICOM_RQ_DTR;
	USETW(req.wValue, sc->sc_dtr ? UCDC_LINE_DTR : 0);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);

	err = usbd_do_request(sc->sc_udev, &req, NULL);
	if (err)
		printf("%s: uticom_dtr: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
}

static void
uticom_rts(struct uticom_softc *sc, int onoff)
{
	usb_device_request_t req;
	usbd_status err;

	DPRINTF(("%s: uticom_rts: onoff = %d\n", sc->sc_dev.dv_xname,
	    onoff));

	if (sc->sc_rts == onoff)
		return;
	sc->sc_rts = onoff;
	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = UTICOM_RQ_RTS;
	USETW(req.wValue, sc->sc_rts ? UCDC_LINE_RTS : 0);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);

	err = usbd_do_request(sc->sc_udev, &req, NULL);
	if (err)
		printf("%s: uticom_rts: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
}

static void
uticom_break(struct uticom_softc *sc, int onoff)
{
	usb_device_request_t req;
	usbd_status err;

	DPRINTF(("%s: uticom_break: onoff = %d\n", sc->sc_dev.dv_xname,
	    onoff));

	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = UTICOM_RQ_BREAK;
	USETW(req.wValue, onoff ? 1 : 0);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);

	err = usbd_do_request(sc->sc_udev, &req, NULL);
	if (err)
		printf("%s: uticom_break: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
}

static usbd_status
uticom_set_crtscts(struct uticom_softc *sc)
{
	usb_device_request_t req;
	usbd_status err;

	DPRINTF(("%s: uticom_set_crtscts: on\n", sc->sc_dev.dv_xname));

	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = UTICOM_RQ_CRTSCTS;
	USETW(req.wValue, 1);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);

	err = usbd_do_request(sc->sc_udev, &req, NULL);
	if (err) {
		printf("%s: uticom_set_crtscts: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		return (err);
	}

	return (USBD_NORMAL_COMPLETION);
}

static int
uticom_param(void *vsc, int portno, struct termios *t)
{
	struct uticom_softc *sc = (struct uticom_softc *)vsc;
	usb_device_request_t req;
	usbd_status err;
	uint8_t data;

	DPRINTF(("%s: uticom_param\n", sc->sc_dev.dv_xname));

	switch (t->c_ospeed) {
	case 1200:
	case 2400:
	case 4800:
	case 7200:
	case 9600:
	case 14400:
	case 19200:
	case 38400:
	case 57600:
	case 115200:
	case 230400:
	case 460800:
	case 921600:
		req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
		req.bRequest = UTICOM_RQ_BAUD;
		USETW(req.wValue, (UTICOM_BRATE_REF / t->c_ospeed));
		USETW(req.wIndex, 0);
		USETW(req.wLength, 0);

		err = usbd_do_request(sc->sc_udev, &req, 0);
		if (err) {
			printf("%s: uticom_param: %s\n",
			    sc->sc_dev.dv_xname, usbd_errstr(err));
			return (EIO);
		}
		break;
	default:
		printf("%s: uticom_param: unsupported baud rate %d\n",
		    sc->sc_dev.dv_xname, t->c_ospeed);
		return (EINVAL);
	}

	switch (ISSET(t->c_cflag, CSIZE)) {
	case CS5:
		data = UTICOM_SET_DATA_BITS(5);
		break;
	case CS6:
		data = UTICOM_SET_DATA_BITS(6);
		break;
	case CS7:
		data = UTICOM_SET_DATA_BITS(7);
		break;
	case CS8:
		data = UTICOM_SET_DATA_BITS(8);
		break;
	default:
		return (EIO);
	}

	if (ISSET(t->c_cflag, CSTOPB))
		data |= UTICOM_STOP_BITS_2;
	else
		data |= UTICOM_STOP_BITS_1;

	if (ISSET(t->c_cflag, PARENB)) {
		if (ISSET(t->c_cflag, PARODD))
			data |= UTICOM_PARITY_ODD;
		else
			data |= UTICOM_PARITY_EVEN;
	} else
		data |= UTICOM_PARITY_NONE;

	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = UTICOM_RQ_LCR;
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);
	USETW(req.wValue, data);

	err = usbd_do_request(sc->sc_udev, &req, NULL);
	if (err) {
		printf("%s: uticom_param: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		return (err);
	}

	if (ISSET(t->c_cflag, CRTSCTS)) {
		err = uticom_set_crtscts(sc);
		if (err)
			return (EIO);
	}

	return (0);
}

static int
uticom_open(void *addr, int portno)
{
	struct uticom_softc *sc = addr;
	usbd_status err;

	if (usbd_is_dying(sc->sc_udev))
		return (ENXIO);

	DPRINTF(("%s: uticom_open\n", sc->sc_dev.dv_xname));

	sc->sc_status = 0; /* clear status bit */

	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, uticom_intr, UTICOM_INTR_INTERVAL);
		if (err) {
			printf("%s: cannot open interrupt pipe (addr %d)\n",
			    sc->sc_dev.dv_xname, sc->sc_intr_number);
			return (EIO);
		}
	}

	DPRINTF(("%s: uticom_open: port opened\n", sc->sc_dev.dv_xname));
	return (0);
}

static void
uticom_close(void *addr, int portno)
{
	struct uticom_softc *sc = addr;
	usb_device_request_t req;
	usbd_status err;

	if (usbd_is_dying(sc->sc_udev))
		return;

	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
	req.bRequest = UTICOM_RQ_SON;
	USETW(req.wValue, 0);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);

	/* Try to reset UART part of chip. */
	err = usbd_do_request(sc->sc_udev, &req, NULL);
	if (err) {
		printf("%s: uticom_close: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));
		return;
	}

	DPRINTF(("%s: uticom_close: close\n", sc->sc_dev.dv_xname));

	if (sc->sc_intr_pipe != NULL) {
		usbd_abort_pipe(sc->sc_intr_pipe);
		err = usbd_close_pipe(sc->sc_intr_pipe);
		if (err)
			printf("%s: close interrupt pipe failed: %s\n",
			    sc->sc_dev.dv_xname, usbd_errstr(err));
		free(sc->sc_intr_buf, M_USBDEV, 0);
		sc->sc_intr_pipe = NULL;
	}
}

static void
uticom_intr(struct usbd_xfer *xfer, void *priv, usbd_status status)
{
	struct uticom_softc *sc = priv;
	u_char *buf = sc->sc_intr_buf;

	if (usbd_is_dying(sc->sc_udev))
		return;

	if (status != USBD_NORMAL_COMPLETION) {
		if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
			DPRINTF(("%s: uticom_intr: int status: %s\n",
			    sc->sc_dev.dv_xname, usbd_errstr(status)));
			return;
		}

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

	if (!xfer->actlen)
		return;

	DPRINTF(("%s: xfer_length = %d\n", sc->sc_dev.dv_xname,
	    xfer->actlen));

	sc->sc_lsr = sc->sc_msr = 0;

	if (buf[0] == 0) {
		/* msr registers */
		if (buf[1] & UTICOM_MCR_CTS)
			sc->sc_msr |= UMSR_CTS;
		if (buf[1] & UTICOM_MCR_DSR)
			sc->sc_msr |= UMSR_DSR;
		if (buf[1] & UTICOM_MCR_CD)
			sc->sc_msr |= UMSR_DCD;
		if (buf[1] & UTICOM_MCR_RI)
			sc->sc_msr |= UMSR_RI;
	} else {
		/* lsr registers */
		if (buf[0] & UTICOM_LCR_OVR)
			sc->sc_lsr |= ULSR_OE;
		if (buf[0] & UTICOM_LCR_PTE)
			sc->sc_lsr |= ULSR_PE;
		if (buf[0] & UTICOM_LCR_FRE)
			sc->sc_lsr |= ULSR_FE;
		if (buf[0] & UTICOM_LCR_BRK)
			sc->sc_lsr |= ULSR_BI;
	}

//	if (uticomstickdsr)
//		sc->sc_msr |= UMSR_DSR;

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

static void
uticom_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
{
#if 0 /* TODO */
	struct uticom_softc *sc = addr;

	DPRINTF(("uticom_get_status:\n"));

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

#if 0 /* TODO */
static int
uticom_ioctl(void *addr, int portno, u_long cmd, caddr_t data, int flag,
    usb_proc_ptr p)
{
	struct uticom_softc *sc = addr;
	int error = 0;

	if (usbd_is_dying(sc->sc_udev))
		return (EIO);

	DPRINTF(("uticom_ioctl: cmd = 0x%08lx\n", cmd));

	switch (cmd) {
	case TIOCNOTTY:
	case TIOCMGET:
	case TIOCMSET:
	case USB_GET_CM_OVER_DATA:
	case USB_SET_CM_OVER_DATA:
		break;

	default:
		DPRINTF(("uticom_ioctl: unknown\n"));
		error = ENOTTY;
		break;
	}

	return (error);
}
#endif

static int
uticom_download_fw(struct uticom_softc *sc, int pipeno,
    struct usbd_device *dev)
{
	u_char *obuf, *firmware;
	size_t firmware_size;
	int buffer_size, pos;
	uint8_t cs = 0, *buffer;
	usbd_status err;
	struct uticom_fw_header *header;
	struct usbd_xfer *oxfer = 0;
	usbd_status error = 0;
	struct usbd_pipe *pipe;

	error = loadfirmware("tusb3410", &firmware, &firmware_size);
	if (error)
		return (error);

	buffer_size = UTICOM_FW_BUFSZ + sizeof(struct uticom_fw_header);
	buffer = malloc(buffer_size, M_USBDEV, M_WAITOK | M_CANFAIL);

	if (!buffer) {
		printf("%s: uticom_download_fw: out of memory\n",
		    sc->sc_dev.dv_xname);
		free(firmware, M_DEVBUF, 0);
		return ENOMEM;
	}

	memcpy(buffer, firmware, firmware_size);
	memset(buffer + firmware_size, 0xff, buffer_size - firmware_size);

	for (pos = sizeof(struct uticom_fw_header); pos < buffer_size; pos++)
		cs = (uint8_t)(cs + buffer[pos]);

	header = (struct uticom_fw_header*)buffer;
	header->length = (uint16_t)(buffer_size -
	    sizeof(struct uticom_fw_header));
	header->checkSum = cs;

	DPRINTF(("%s: downloading firmware ...\n",
	    sc->sc_dev.dv_xname));

	err = usbd_open_pipe(sc->sc_iface, pipeno, USBD_EXCLUSIVE_USE,
	    &pipe);
	if (err) {
		printf("%s: open bulk out error (addr %d): %s\n",
		    sc->sc_dev.dv_xname, pipeno, usbd_errstr(err));
		error = EIO;
		goto finish;
	}

	oxfer = usbd_alloc_xfer(dev);
	if (oxfer == NULL) {
		error = ENOMEM;
		goto finish;
	}

	obuf = usbd_alloc_buffer(oxfer, buffer_size);
	if (obuf == NULL) {
		error = ENOMEM;
		goto finish;
	}

	memcpy(obuf, buffer, buffer_size);

	usbd_setup_xfer(oxfer, pipe, (void *)sc, obuf, buffer_size,
	    USBD_NO_COPY | USBD_SYNCHRONOUS, USBD_NO_TIMEOUT, 0);
	err = usbd_transfer(oxfer);

	if (err != USBD_NORMAL_COMPLETION)
		printf("%s: uticom_download_fw: error: %s\n",
		    sc->sc_dev.dv_xname, usbd_errstr(err));

finish:
	free(firmware, M_DEVBUF, 0);
	usbd_free_buffer(oxfer);
	usbd_free_xfer(oxfer);
	oxfer = NULL;
	usbd_abort_pipe(pipe);
	usbd_close_pipe(pipe);
	free(buffer, M_USBDEV, 0);
	return err;
}