u3g.c revision 192984 
1/*
2 * Copyright (c) 2008 AnyWi Technologies
3 * Author: Andrea Guzzo <aguzzo@anywi.com>
4 * * based on uark.c 1.1 2006/08/14 08:30:22 jsg *
5 * * parts from ubsa.c 183348 2008-09-25 12:00:56Z phk *
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 *
19 * $FreeBSD: head/sys/dev/usb/serial/u3g.c 192984 2009-05-28 17:36:36Z thompsa $
20 */
21
22/*
23 * NOTE:
24 *
25 * - The detour through the tty layer is ridiculously expensive wrt
26 *   buffering due to the high speeds.
27 *
28 *   We should consider adding a simple r/w device which allows
29 *   attaching of PPP in a more efficient way.
30 *
31 */
32
33#include "usbdevs.h"
34#include <dev/usb/usb.h>
35#include <dev/usb/usb_mfunc.h>
36#include <dev/usb/usb_error.h>
37
38#define	USB_DEBUG_VAR u3g_debug
39
40#include <dev/usb/usb_core.h>
41#include <dev/usb/usb_debug.h>
42#include <dev/usb/usb_process.h>
43#include <dev/usb/usb_request.h>
44#include <dev/usb/usb_lookup.h>
45#include <dev/usb/usb_util.h>
46#include <dev/usb/usb_busdma.h>
47#include <dev/usb/usb_msctest.h>
48#include <dev/usb/usb_dynamic.h>
49#include <dev/usb/usb_device.h>
50
51#include <dev/usb/serial/usb_serial.h>
52
53#if USB_DEBUG
54static int u3g_debug = 0;
55
56SYSCTL_NODE(_hw_usb, OID_AUTO, u3g, CTLFLAG_RW, 0, "USB 3g");
57SYSCTL_INT(_hw_usb_u3g, OID_AUTO, debug, CTLFLAG_RW,
58    &u3g_debug, 0, "Debug level");
59#endif
60
61#define	U3G_MAXPORTS		8
62#define	U3G_CONFIG_INDEX	0
63#define	U3G_BSIZE		2048
64
65#define	U3GSP_GPRS		0
66#define	U3GSP_EDGE		1
67#define	U3GSP_CDMA		2
68#define	U3GSP_UMTS		3
69#define	U3GSP_HSDPA		4
70#define	U3GSP_HSUPA		5
71#define	U3GSP_HSPA		6
72#define	U3GSP_MAX		7
73
74#define	U3GFL_HUAWEI_INIT	0x0001	/* Init command required */
75#define	U3GFL_SCSI_EJECT	0x0002	/* SCSI eject command required */
76#define	U3GFL_SIERRA_INIT	0x0004	/* Init command required */
77#define	U3GFL_SAEL_M460_INIT	0x0008	/* Init device */
78
79enum {
80	U3G_BULK_WR,
81	U3G_BULK_RD,
82	U3G_N_TRANSFER,
83};
84
85struct u3g_softc {
86	struct ucom_super_softc sc_super_ucom;
87	struct ucom_softc sc_ucom[U3G_MAXPORTS];
88
89	struct usb_xfer *sc_xfer[U3G_MAXPORTS][U3G_N_TRANSFER];
90	struct usb_device *sc_udev;
91	struct mtx sc_mtx;
92
93	uint8_t	sc_lsr;			/* local status register */
94	uint8_t	sc_msr;			/* U3G status register */
95	uint8_t	sc_numports;
96};
97
98static device_probe_t u3g_probe;
99static device_attach_t u3g_attach;
100static device_detach_t u3g_detach;
101
102static usb2_callback_t u3g_write_callback;
103static usb2_callback_t u3g_read_callback;
104
105static void u3g_start_read(struct ucom_softc *ucom);
106static void u3g_stop_read(struct ucom_softc *ucom);
107static void u3g_start_write(struct ucom_softc *ucom);
108static void u3g_stop_write(struct ucom_softc *ucom);
109
110static int u3g_driver_loaded(struct module *mod, int what, void *arg);
111
112static const struct usb_config u3g_config[U3G_N_TRANSFER] = {
113
114	[U3G_BULK_WR] = {
115		.type = UE_BULK,
116		.endpoint = UE_ADDR_ANY,
117		.direction = UE_DIR_OUT,
118		.bufsize = U3G_BSIZE,/* bytes */
119		.flags = {.pipe_bof = 1,.force_short_xfer = 1,},
120		.callback = &u3g_write_callback,
121	},
122
123	[U3G_BULK_RD] = {
124		.type = UE_BULK,
125		.endpoint = UE_ADDR_ANY,
126		.direction = UE_DIR_IN,
127		.bufsize = U3G_BSIZE,/* bytes */
128		.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
129		.callback = &u3g_read_callback,
130	},
131};
132
133static const struct ucom_callback u3g_callback = {
134	.usb2_com_start_read = &u3g_start_read,
135	.usb2_com_stop_read = &u3g_stop_read,
136	.usb2_com_start_write = &u3g_start_write,
137	.usb2_com_stop_write = &u3g_stop_write,
138};
139
140static device_method_t u3g_methods[] = {
141	DEVMETHOD(device_probe, u3g_probe),
142	DEVMETHOD(device_attach, u3g_attach),
143	DEVMETHOD(device_detach, u3g_detach),
144	{0, 0}
145};
146
147static devclass_t u3g_devclass;
148
149static driver_t u3g_driver = {
150	.name = "u3g",
151	.methods = u3g_methods,
152	.size = sizeof(struct u3g_softc),
153};
154
155DRIVER_MODULE(u3g, uhub, u3g_driver, u3g_devclass, u3g_driver_loaded, 0);
156MODULE_DEPEND(u3g, ucom, 1, 1, 1);
157MODULE_DEPEND(u3g, usb, 1, 1, 1);
158
159static const struct usb_device_id u3g_devs[] = {
160#define	U3G_DEV(v,p,i) { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, i) }
161	/* OEM: Option */
162	U3G_DEV(OPTION, GT3G, 0),
163	U3G_DEV(OPTION, GT3GQUAD, 0),
164	U3G_DEV(OPTION, GT3GPLUS, 0),
165	U3G_DEV(OPTION, GTMAX36, 0),
166	U3G_DEV(OPTION, GTHSDPA, 0),
167	U3G_DEV(OPTION, GTMAXHSUPA, 0),
168	U3G_DEV(OPTION, VODAFONEMC3G, 0),
169	/* OEM: Qualcomm, Inc. */
170	U3G_DEV(QUALCOMMINC, ZTE_STOR, U3GFL_SCSI_EJECT),
171	U3G_DEV(QUALCOMMINC, CDMA_MSM, U3GFL_SCSI_EJECT),
172	/* OEM: Huawei */
173	U3G_DEV(HUAWEI, MOBILE, U3GFL_HUAWEI_INIT),
174	U3G_DEV(HUAWEI, E220, U3GFL_HUAWEI_INIT),
175	/* OEM: Novatel */
176	U3G_DEV(NOVATEL, CDMA_MODEM, 0),
177	U3G_DEV(NOVATEL, ES620, 0),
178	U3G_DEV(NOVATEL, MC950D, 0),
179	U3G_DEV(NOVATEL, U720, 0),
180	U3G_DEV(NOVATEL, U727, 0),
181	U3G_DEV(NOVATEL, U740, 0),
182	U3G_DEV(NOVATEL, U740_2, 0),
183	U3G_DEV(NOVATEL, U870, 0),
184	U3G_DEV(NOVATEL, V620, 0),
185	U3G_DEV(NOVATEL, V640, 0),
186	U3G_DEV(NOVATEL, V720, 0),
187	U3G_DEV(NOVATEL, V740, 0),
188	U3G_DEV(NOVATEL, X950D, 0),
189	U3G_DEV(NOVATEL, XU870, 0),
190	U3G_DEV(NOVATEL, ZEROCD, U3GFL_SCSI_EJECT),
191	U3G_DEV(DELL, U740, 0),
192	/* OEM: Merlin */
193	U3G_DEV(MERLIN, V620, 0),
194	/* OEM: Sierra Wireless: */
195	U3G_DEV(SIERRA, AIRCARD580, 0),
196	U3G_DEV(SIERRA, AIRCARD595, 0),
197	U3G_DEV(SIERRA, AC595U, 0),
198	U3G_DEV(SIERRA, AC597E, 0),
199	U3G_DEV(SIERRA, C597, 0),
200	U3G_DEV(SIERRA, AC880, 0),
201	U3G_DEV(SIERRA, AC880E, 0),
202	U3G_DEV(SIERRA, AC880U, 0),
203	U3G_DEV(SIERRA, AC881, 0),
204	U3G_DEV(SIERRA, AC881E, 0),
205	U3G_DEV(SIERRA, AC881U, 0),
206	U3G_DEV(SIERRA, AC885U, 0),
207	U3G_DEV(SIERRA, EM5625, 0),
208	U3G_DEV(SIERRA, MC5720, 0),
209	U3G_DEV(SIERRA, MC5720_2, 0),
210	U3G_DEV(SIERRA, MC5725, 0),
211	U3G_DEV(SIERRA, MINI5725, 0),
212	U3G_DEV(SIERRA, AIRCARD875, 0),
213	U3G_DEV(SIERRA, MC8755, 0),
214	U3G_DEV(SIERRA, MC8755_2, 0),
215	U3G_DEV(SIERRA, MC8755_3, 0),
216	U3G_DEV(SIERRA, MC8765, 0),
217	U3G_DEV(SIERRA, AC875U, 0),
218	U3G_DEV(SIERRA, MC8775_2, 0),
219	U3G_DEV(SIERRA, MC8780, 0),
220	U3G_DEV(SIERRA, MC8781, 0),
221	U3G_DEV(HP, HS2300, 0),
222	/* Sierra TruInstaller device ID */
223	U3G_DEV(SIERRA, TRUINSTALL, U3GFL_SIERRA_INIT),
224	/* PRUEBA SILABS */
225	U3G_DEV(SILABS, SAEL, U3GFL_SAEL_M460_INIT),
226};
227
228static void
229u3g_sierra_init(struct usb_device *udev)
230{
231	struct usb_device_request req;
232
233	DPRINTFN(0, "\n");
234
235	req.bmRequestType = UT_VENDOR;
236	req.bRequest = UR_SET_INTERFACE;
237	USETW(req.wValue, UF_DEVICE_REMOTE_WAKEUP);
238	USETW(req.wIndex, UHF_PORT_CONNECTION);
239	USETW(req.wLength, 0);
240
241	if (usb2_do_request_flags(udev, NULL, &req,
242	    NULL, 0, NULL, USB_MS_HZ)) {
243		/* ignore any errors */
244	}
245	return;
246}
247
248static void
249u3g_huawei_init(struct usb_device *udev)
250{
251	struct usb_device_request req;
252
253	DPRINTFN(0, "\n");
254
255	req.bmRequestType = UT_WRITE_DEVICE;
256	req.bRequest = UR_SET_FEATURE;
257	USETW(req.wValue, UF_DEVICE_REMOTE_WAKEUP);
258	USETW(req.wIndex, UHF_PORT_SUSPEND);
259	USETW(req.wLength, 0);
260
261	if (usb2_do_request_flags(udev, NULL, &req,
262	    NULL, 0, NULL, USB_MS_HZ)) {
263		/* ignore any errors */
264	}
265	return;
266}
267
268static void
269u3g_sael_m460_init(struct usb_device *udev)
270{
271	static const uint8_t setup[][24] = {
272	     { 0x41, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
273	     { 0x41, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 },
274	     { 0x41, 0x13, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
275	       0x01, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
276	       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
277	     { 0xc1, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x40, 0x02 },
278	     { 0xc1, 0x08, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00 },
279	     { 0x41, 0x07, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00 },
280	     { 0xc1, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 },
281	     { 0x41, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00 },
282	     { 0x41, 0x07, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00 },
283	     { 0x41, 0x03, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00 },
284	     { 0x41, 0x19, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
285	       0x00, 0x00, 0x00, 0x00, 0x11, 0x13 },
286	     { 0x41, 0x13, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
287	       0x09, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
288	       0x0a, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00 },
289	     { 0x41, 0x12, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00 },
290	     { 0x41, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00 },
291	     { 0x41, 0x07, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00 },
292	     { 0x41, 0x03, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00 },
293	     { 0x41, 0x19, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
294	       0x00, 0x00, 0x00, 0x00, 0x11, 0x13 },
295	     { 0x41, 0x13, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
296	       0x09, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
297	       0x0a, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00 },
298	     { 0x41, 0x07, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00 },
299	};
300
301	struct usb_device_request req;
302	usb2_error_t err;
303	uint16_t len;
304	uint8_t buf[0x300];
305	uint8_t n;
306
307	DPRINTFN(1, "\n");
308
309	if (usb2_req_set_alt_interface_no(udev, NULL, 0, 0)) {
310		DPRINTFN(0, "Alt setting 0 failed\n");
311		return;
312	}
313
314	for (n = 0; n != (sizeof(setup)/sizeof(setup[0])); n++) {
315
316		memcpy(&req, setup[n], sizeof(req));
317
318		len = UGETW(req.wLength);
319		if (req.bmRequestType & UE_DIR_IN) {
320			if (len > sizeof(buf)) {
321				DPRINTFN(0, "too small buffer\n");
322				continue;
323			}
324			err = usb2_do_request(udev, NULL, &req, buf);
325		} else {
326			if (len > (sizeof(setup[0]) - 8)) {
327				DPRINTFN(0, "too small buffer\n");
328				continue;
329			}
330			err = usb2_do_request(udev, NULL, &req,
331			    __DECONST(uint8_t *, &setup[n][8]));
332		}
333		if (err) {
334			DPRINTFN(1, "request %u failed\n",
335			    (unsigned int)n);
336			/*
337			 * Some of the requests will fail. Stop doing
338			 * requests when we are getting timeouts so
339			 * that we don't block the explore/attach
340			 * thread forever.
341			 */
342			if (err == USB_ERR_TIMEOUT)
343				break;
344		}
345	}
346}
347
348static int
349u3g_lookup_huawei(struct usb_attach_arg *uaa)
350{
351	/* Calling the lookup function will also set the driver info! */
352	return (usb2_lookup_id_by_uaa(u3g_devs, sizeof(u3g_devs), uaa));
353}
354
355/*
356 * The following function handles 3G modem devices (E220, Mobile,
357 * etc.) with auto-install flash disks for Windows/MacOSX on the first
358 * interface.  After some command or some delay they change appearance
359 * to a modem.
360 */
361static usb2_error_t
362u3g_test_huawei_autoinst(struct usb_device *udev,
363    struct usb_attach_arg *uaa)
364{
365	struct usb_interface *iface;
366	struct usb_interface_descriptor *id;
367	uint32_t flags;
368
369	if (udev == NULL) {
370		return (USB_ERR_INVAL);
371	}
372	iface = usb2_get_iface(udev, 0);
373	if (iface == NULL) {
374		return (USB_ERR_INVAL);
375	}
376	id = iface->idesc;
377	if (id == NULL) {
378		return (USB_ERR_INVAL);
379	}
380	if (id->bInterfaceClass != UICLASS_MASS) {
381		return (USB_ERR_INVAL);
382	}
383	if (u3g_lookup_huawei(uaa)) {
384		/* no device match */
385		return (USB_ERR_INVAL);
386	}
387	flags = USB_GET_DRIVER_INFO(uaa);
388
389	if (flags & U3GFL_HUAWEI_INIT) {
390		u3g_huawei_init(udev);
391	} else if (flags & U3GFL_SCSI_EJECT) {
392		return (usb2_test_autoinstall(udev, 0, 1));
393	} else if (flags & U3GFL_SIERRA_INIT) {
394		u3g_sierra_init(udev);
395	} else {
396		/* no quirks */
397		return (USB_ERR_INVAL);
398	}
399	return (0);			/* success */
400}
401
402static int
403u3g_driver_loaded(struct module *mod, int what, void *arg)
404{
405	switch (what) {
406	case MOD_LOAD:
407		/* register our autoinstall handler */
408		usb2_test_huawei_autoinst_p = &u3g_test_huawei_autoinst;
409		break;
410	case MOD_UNLOAD:
411		usb2_test_huawei_unload(NULL);
412		break;
413	default:
414		return (EOPNOTSUPP);
415	}
416 	return (0);
417}
418
419static int
420u3g_probe(device_t self)
421{
422	struct usb_attach_arg *uaa = device_get_ivars(self);
423
424	if (uaa->usb_mode != USB_MODE_HOST) {
425		return (ENXIO);
426	}
427	if (uaa->info.bConfigIndex != U3G_CONFIG_INDEX) {
428		return (ENXIO);
429	}
430	if (uaa->info.bInterfaceClass != UICLASS_VENDOR) {
431		return (ENXIO);
432	}
433	return (u3g_lookup_huawei(uaa));
434}
435
436static int
437u3g_attach(device_t dev)
438{
439	struct usb_config u3g_config_tmp[U3G_N_TRANSFER];
440	struct usb_attach_arg *uaa = device_get_ivars(dev);
441	struct u3g_softc *sc = device_get_softc(dev);
442	struct usb_interface *iface;
443	struct usb_interface_descriptor *id;
444	uint32_t iface_valid;
445	int error, flags, nports;
446	int ep, n;
447	uint8_t i;
448
449	DPRINTF("sc=%p\n", sc);
450
451	flags = USB_GET_DRIVER_INFO(uaa);
452
453	if (flags & U3GFL_SAEL_M460_INIT)
454		u3g_sael_m460_init(uaa->device);
455
456	/* copy in USB config */
457	for (n = 0; n != U3G_N_TRANSFER; n++)
458		u3g_config_tmp[n] = u3g_config[n];
459
460	device_set_usb2_desc(dev);
461	mtx_init(&sc->sc_mtx, "u3g", NULL, MTX_DEF);
462
463	sc->sc_udev = uaa->device;
464
465	/* Claim all interfaces on the device */
466	iface_valid = 0;
467	for (i = uaa->info.bIfaceIndex; i < USB_IFACE_MAX; i++) {
468		iface = usb2_get_iface(uaa->device, i);
469		if (iface == NULL)
470			break;
471		id = usb2_get_interface_descriptor(iface);
472		if (id == NULL || id->bInterfaceClass != UICLASS_VENDOR)
473			continue;
474		usb2_set_parent_iface(uaa->device, i, uaa->info.bIfaceIndex);
475		iface_valid |= (1<<i);
476	}
477
478	i = 0;		/* interface index */
479	ep = 0;		/* endpoint index */
480	nports = 0;	/* number of ports */
481	while (i < USB_IFACE_MAX) {
482		if ((iface_valid & (1<<i)) == 0) {
483			i++;
484			continue;
485		}
486
487		/* update BULK endpoint index */
488		for (n = 0; n < U3G_N_TRANSFER; n++)
489			u3g_config_tmp[n].ep_index = ep;
490
491		/* try to allocate a set of BULK endpoints */
492		error = usb2_transfer_setup(uaa->device, &i,
493		    sc->sc_xfer[nports], u3g_config_tmp, U3G_N_TRANSFER,
494		    &sc->sc_ucom[nports], &sc->sc_mtx);
495		if (error) {
496			/* next interface */
497			i++;
498			ep = 0;
499			continue;
500		}
501
502		/* set stall by default */
503		mtx_lock(&sc->sc_mtx);
504		usb2_transfer_set_stall(sc->sc_xfer[nports][U3G_BULK_WR]);
505		usb2_transfer_set_stall(sc->sc_xfer[nports][U3G_BULK_RD]);
506		mtx_unlock(&sc->sc_mtx);
507
508		nports++;	/* found one port */
509		ep++;
510		if (nports == U3G_MAXPORTS)
511			break;
512	}
513	if (nports == 0) {
514		device_printf(dev, "no ports found\n");
515		goto detach;
516	}
517	sc->sc_numports = nports;
518
519	error = usb2_com_attach(&sc->sc_super_ucom, sc->sc_ucom,
520	    sc->sc_numports, sc, &u3g_callback, &sc->sc_mtx);
521	if (error) {
522		DPRINTF("usb2_com_attach failed\n");
523		goto detach;
524	}
525	if (sc->sc_numports > 1)
526		device_printf(dev, "Found %u ports.\n", sc->sc_numports);
527	return (0);
528
529detach:
530	u3g_detach(dev);
531	return (ENXIO);
532}
533
534static int
535u3g_detach(device_t dev)
536{
537	struct u3g_softc *sc = device_get_softc(dev);
538	uint8_t m;
539
540	DPRINTF("sc=%p\n", sc);
541
542	/* NOTE: It is not dangerous to detach more ports than attached! */
543	usb2_com_detach(&sc->sc_super_ucom, sc->sc_ucom, U3G_MAXPORTS);
544
545	for (m = 0; m != U3G_MAXPORTS; m++)
546		usb2_transfer_unsetup(sc->sc_xfer[m], U3G_N_TRANSFER);
547	mtx_destroy(&sc->sc_mtx);
548
549	return (0);
550}
551
552static void
553u3g_start_read(struct ucom_softc *ucom)
554{
555	struct u3g_softc *sc = ucom->sc_parent;
556
557	/* start read endpoint */
558	usb2_transfer_start(sc->sc_xfer[ucom->sc_local_unit][U3G_BULK_RD]);
559	return;
560}
561
562static void
563u3g_stop_read(struct ucom_softc *ucom)
564{
565	struct u3g_softc *sc = ucom->sc_parent;
566
567	/* stop read endpoint */
568	usb2_transfer_stop(sc->sc_xfer[ucom->sc_local_unit][U3G_BULK_RD]);
569	return;
570}
571
572static void
573u3g_start_write(struct ucom_softc *ucom)
574{
575	struct u3g_softc *sc = ucom->sc_parent;
576
577	usb2_transfer_start(sc->sc_xfer[ucom->sc_local_unit][U3G_BULK_WR]);
578	return;
579}
580
581static void
582u3g_stop_write(struct ucom_softc *ucom)
583{
584	struct u3g_softc *sc = ucom->sc_parent;
585
586	usb2_transfer_stop(sc->sc_xfer[ucom->sc_local_unit][U3G_BULK_WR]);
587	return;
588}
589
590static void
591u3g_write_callback(struct usb_xfer *xfer)
592{
593	struct ucom_softc *ucom = xfer->priv_sc;
594	uint32_t actlen;
595
596	switch (USB_GET_STATE(xfer)) {
597	case USB_ST_TRANSFERRED:
598	case USB_ST_SETUP:
599tr_setup:
600		if (usb2_com_get_data(ucom, xfer->frbuffers, 0,
601		    U3G_BSIZE, &actlen)) {
602			xfer->frlengths[0] = actlen;
603			usb2_start_hardware(xfer);
604		}
605		break;
606
607	default:			/* Error */
608		if (xfer->error != USB_ERR_CANCELLED) {
609			/* do a builtin clear-stall */
610			xfer->flags.stall_pipe = 1;
611			goto tr_setup;
612		}
613		break;
614	}
615	return;
616}
617
618static void
619u3g_read_callback(struct usb_xfer *xfer)
620{
621	struct ucom_softc *ucom = xfer->priv_sc;
622
623	switch (USB_GET_STATE(xfer)) {
624	case USB_ST_TRANSFERRED:
625		usb2_com_put_data(ucom, xfer->frbuffers, 0, xfer->actlen);
626
627	case USB_ST_SETUP:
628tr_setup:
629		xfer->frlengths[0] = xfer->max_data_length;
630		usb2_start_hardware(xfer);
631		break;
632
633	default:			/* Error */
634		if (xfer->error != USB_ERR_CANCELLED) {
635			/* do a builtin clear-stall */
636			xfer->flags.stall_pipe = 1;
637			goto tr_setup;
638		}
639		break;
640	}
641	return;
642}
643