u3g.c revision 196219 
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 196219 2009-08-14 20:03:53Z jhb $
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
34#include <sys/stdint.h>
35#include <sys/stddef.h>
36#include <sys/param.h>
37#include <sys/queue.h>
38#include <sys/types.h>
39#include <sys/systm.h>
40#include <sys/kernel.h>
41#include <sys/bus.h>
42#include <sys/linker_set.h>
43#include <sys/module.h>
44#include <sys/lock.h>
45#include <sys/mutex.h>
46#include <sys/condvar.h>
47#include <sys/sysctl.h>
48#include <sys/sx.h>
49#include <sys/unistd.h>
50#include <sys/callout.h>
51#include <sys/malloc.h>
52#include <sys/priv.h>
53
54#include <dev/usb/usb.h>
55#include <dev/usb/usbdi.h>
56#include <dev/usb/usbdi_util.h>
57#include "usbdevs.h"
58
59#define	USB_DEBUG_VAR u3g_debug
60#include <dev/usb/usb_debug.h>
61#include <dev/usb/usb_process.h>
62#include <dev/usb/usb_dynamic.h>
63#include <dev/usb/usb_msctest.h>
64#include <dev/usb/usb_device.h>
65
66#include <dev/usb/serial/usb_serial.h>
67
68#if USB_DEBUG
69static int u3g_debug = 0;
70
71SYSCTL_NODE(_hw_usb, OID_AUTO, u3g, CTLFLAG_RW, 0, "USB 3g");
72SYSCTL_INT(_hw_usb_u3g, OID_AUTO, debug, CTLFLAG_RW,
73    &u3g_debug, 0, "Debug level");
74#endif
75
76#define	U3G_MAXPORTS		8
77#define	U3G_CONFIG_INDEX	0
78#define	U3G_BSIZE		2048
79
80#define	U3GSP_GPRS		0
81#define	U3GSP_EDGE		1
82#define	U3GSP_CDMA		2
83#define	U3GSP_UMTS		3
84#define	U3GSP_HSDPA		4
85#define	U3GSP_HSUPA		5
86#define	U3GSP_HSPA		6
87#define	U3GSP_MAX		7
88
89#define	U3GFL_HUAWEI_INIT	0x0001	/* Init command required */
90#define	U3GFL_SCSI_EJECT	0x0002	/* SCSI eject command required */
91#define	U3GFL_SIERRA_INIT	0x0004	/* Init command required */
92#define	U3GFL_SAEL_M460_INIT	0x0008	/* Init device */
93
94enum {
95	U3G_BULK_WR,
96	U3G_BULK_RD,
97	U3G_N_TRANSFER,
98};
99
100struct u3g_softc {
101	struct ucom_super_softc sc_super_ucom;
102	struct ucom_softc sc_ucom[U3G_MAXPORTS];
103
104	struct usb_xfer *sc_xfer[U3G_MAXPORTS][U3G_N_TRANSFER];
105	struct usb_device *sc_udev;
106	struct mtx sc_mtx;
107
108	uint8_t	sc_lsr;			/* local status register */
109	uint8_t	sc_msr;			/* U3G status register */
110	uint8_t	sc_numports;
111};
112
113static device_probe_t u3g_probe;
114static device_attach_t u3g_attach;
115static device_detach_t u3g_detach;
116
117static usb_callback_t u3g_write_callback;
118static usb_callback_t u3g_read_callback;
119
120static void u3g_start_read(struct ucom_softc *ucom);
121static void u3g_stop_read(struct ucom_softc *ucom);
122static void u3g_start_write(struct ucom_softc *ucom);
123static void u3g_stop_write(struct ucom_softc *ucom);
124
125static int u3g_driver_loaded(struct module *mod, int what, void *arg);
126
127static const struct usb_config u3g_config[U3G_N_TRANSFER] = {
128
129	[U3G_BULK_WR] = {
130		.type = UE_BULK,
131		.endpoint = UE_ADDR_ANY,
132		.direction = UE_DIR_OUT,
133		.bufsize = U3G_BSIZE,/* bytes */
134		.flags = {.pipe_bof = 1,.force_short_xfer = 1,},
135		.callback = &u3g_write_callback,
136	},
137
138	[U3G_BULK_RD] = {
139		.type = UE_BULK,
140		.endpoint = UE_ADDR_ANY,
141		.direction = UE_DIR_IN,
142		.bufsize = U3G_BSIZE,/* bytes */
143		.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
144		.callback = &u3g_read_callback,
145	},
146};
147
148static const struct ucom_callback u3g_callback = {
149	.ucom_start_read = &u3g_start_read,
150	.ucom_stop_read = &u3g_stop_read,
151	.ucom_start_write = &u3g_start_write,
152	.ucom_stop_write = &u3g_stop_write,
153};
154
155static device_method_t u3g_methods[] = {
156	DEVMETHOD(device_probe, u3g_probe),
157	DEVMETHOD(device_attach, u3g_attach),
158	DEVMETHOD(device_detach, u3g_detach),
159	{0, 0}
160};
161
162static devclass_t u3g_devclass;
163
164static driver_t u3g_driver = {
165	.name = "u3g",
166	.methods = u3g_methods,
167	.size = sizeof(struct u3g_softc),
168};
169
170DRIVER_MODULE(u3g, uhub, u3g_driver, u3g_devclass, u3g_driver_loaded, 0);
171MODULE_DEPEND(u3g, ucom, 1, 1, 1);
172MODULE_DEPEND(u3g, usb, 1, 1, 1);
173
174static const struct usb_device_id u3g_devs[] = {
175#define	U3G_DEV(v,p,i) { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, i) }
176	/* OEM: Option */
177	U3G_DEV(OPTION, GT3G, 0),
178	U3G_DEV(OPTION, GT3GQUAD, 0),
179	U3G_DEV(OPTION, GT3GPLUS, 0),
180	U3G_DEV(OPTION, GTMAX36, 0),
181	U3G_DEV(OPTION, GTHSDPA, 0),
182	U3G_DEV(OPTION, GTMAXHSUPA, 0),
183	U3G_DEV(OPTION, VODAFONEMC3G, 0),
184	/* OEM: Qualcomm, Inc. */
185	U3G_DEV(QUALCOMMINC, ZTE_STOR, U3GFL_SCSI_EJECT),
186	U3G_DEV(QUALCOMMINC, CDMA_MSM, U3GFL_SCSI_EJECT),
187	/* OEM: Huawei */
188	U3G_DEV(HUAWEI, MOBILE, U3GFL_HUAWEI_INIT),
189	U3G_DEV(HUAWEI, E180V, U3GFL_HUAWEI_INIT),
190	U3G_DEV(HUAWEI, E220, U3GFL_HUAWEI_INIT),
191	/* OEM: Novatel */
192	U3G_DEV(NOVATEL, CDMA_MODEM, 0),
193	U3G_DEV(NOVATEL, ES620, 0),
194	U3G_DEV(NOVATEL, MC950D, 0),
195	U3G_DEV(NOVATEL, U720, 0),
196	U3G_DEV(NOVATEL, U727, 0),
197	U3G_DEV(NOVATEL, U740, 0),
198	U3G_DEV(NOVATEL, U740_2, 0),
199	U3G_DEV(NOVATEL, U870, 0),
200	U3G_DEV(NOVATEL, V620, 0),
201	U3G_DEV(NOVATEL, V640, 0),
202	U3G_DEV(NOVATEL, V720, 0),
203	U3G_DEV(NOVATEL, V740, 0),
204	U3G_DEV(NOVATEL, X950D, 0),
205	U3G_DEV(NOVATEL, XU870, 0),
206	U3G_DEV(NOVATEL, ZEROCD, U3GFL_SCSI_EJECT),
207	U3G_DEV(DELL, U740, 0),
208	/* OEM: Merlin */
209	U3G_DEV(MERLIN, V620, 0),
210	/* OEM: Sierra Wireless: */
211	U3G_DEV(SIERRA, AIRCARD580, 0),
212	U3G_DEV(SIERRA, AIRCARD595, 0),
213	U3G_DEV(SIERRA, AC595U, 0),
214	U3G_DEV(SIERRA, AC597E, 0),
215	U3G_DEV(SIERRA, C597, 0),
216	U3G_DEV(SIERRA, AC880, 0),
217	U3G_DEV(SIERRA, AC880E, 0),
218	U3G_DEV(SIERRA, AC880U, 0),
219	U3G_DEV(SIERRA, AC881, 0),
220	U3G_DEV(SIERRA, AC881E, 0),
221	U3G_DEV(SIERRA, AC881U, 0),
222	U3G_DEV(SIERRA, AC885U, 0),
223	U3G_DEV(SIERRA, EM5625, 0),
224	U3G_DEV(SIERRA, MC5720, 0),
225	U3G_DEV(SIERRA, MC5720_2, 0),
226	U3G_DEV(SIERRA, MC5725, 0),
227	U3G_DEV(SIERRA, MINI5725, 0),
228	U3G_DEV(SIERRA, AIRCARD875, 0),
229	U3G_DEV(SIERRA, MC8755, 0),
230	U3G_DEV(SIERRA, MC8755_2, 0),
231	U3G_DEV(SIERRA, MC8755_3, 0),
232	U3G_DEV(SIERRA, MC8765, 0),
233	U3G_DEV(SIERRA, AC875U, 0),
234	U3G_DEV(SIERRA, MC8775_2, 0),
235	U3G_DEV(SIERRA, MC8780, 0),
236	U3G_DEV(SIERRA, MC8781, 0),
237	U3G_DEV(HP, HS2300, 0),
238	/* Sierra TruInstaller device ID */
239	U3G_DEV(SIERRA, TRUINSTALL, U3GFL_SIERRA_INIT),
240	/* PRUEBA SILABS */
241	U3G_DEV(SILABS, SAEL, U3GFL_SAEL_M460_INIT),
242};
243
244static void
245u3g_sierra_init(struct usb_device *udev)
246{
247	struct usb_device_request req;
248
249	DPRINTFN(0, "\n");
250
251	req.bmRequestType = UT_VENDOR;
252	req.bRequest = UR_SET_INTERFACE;
253	USETW(req.wValue, UF_DEVICE_REMOTE_WAKEUP);
254	USETW(req.wIndex, UHF_PORT_CONNECTION);
255	USETW(req.wLength, 0);
256
257	if (usbd_do_request_flags(udev, NULL, &req,
258	    NULL, 0, NULL, USB_MS_HZ)) {
259		/* ignore any errors */
260	}
261	return;
262}
263
264static void
265u3g_huawei_init(struct usb_device *udev)
266{
267	struct usb_device_request req;
268
269	DPRINTFN(0, "\n");
270
271	req.bmRequestType = UT_WRITE_DEVICE;
272	req.bRequest = UR_SET_FEATURE;
273	USETW(req.wValue, UF_DEVICE_REMOTE_WAKEUP);
274	USETW(req.wIndex, UHF_PORT_SUSPEND);
275	USETW(req.wLength, 0);
276
277	if (usbd_do_request_flags(udev, NULL, &req,
278	    NULL, 0, NULL, USB_MS_HZ)) {
279		/* ignore any errors */
280	}
281	return;
282}
283
284static void
285u3g_sael_m460_init(struct usb_device *udev)
286{
287	static const uint8_t setup[][24] = {
288	     { 0x41, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
289	     { 0x41, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 },
290	     { 0x41, 0x13, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
291	       0x01, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
292	       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
293	     { 0xc1, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x40, 0x02 },
294	     { 0xc1, 0x08, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00 },
295	     { 0x41, 0x07, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00 },
296	     { 0xc1, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02 },
297	     { 0x41, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00 },
298	     { 0x41, 0x07, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00 },
299	     { 0x41, 0x03, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00 },
300	     { 0x41, 0x19, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
301	       0x00, 0x00, 0x00, 0x00, 0x11, 0x13 },
302	     { 0x41, 0x13, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
303	       0x09, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
304	       0x0a, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00 },
305	     { 0x41, 0x12, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00 },
306	     { 0x41, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00 },
307	     { 0x41, 0x07, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00 },
308	     { 0x41, 0x03, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00 },
309	     { 0x41, 0x19, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
310	       0x00, 0x00, 0x00, 0x00, 0x11, 0x13 },
311	     { 0x41, 0x13, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
312	       0x09, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
313	       0x0a, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x00 },
314	     { 0x41, 0x07, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00 },
315	};
316
317	struct usb_device_request req;
318	usb_error_t err;
319	uint16_t len;
320	uint8_t buf[0x300];
321	uint8_t n;
322
323	DPRINTFN(1, "\n");
324
325	if (usbd_req_set_alt_interface_no(udev, NULL, 0, 0)) {
326		DPRINTFN(0, "Alt setting 0 failed\n");
327		return;
328	}
329
330	for (n = 0; n != (sizeof(setup)/sizeof(setup[0])); n++) {
331
332		memcpy(&req, setup[n], sizeof(req));
333
334		len = UGETW(req.wLength);
335		if (req.bmRequestType & UE_DIR_IN) {
336			if (len > sizeof(buf)) {
337				DPRINTFN(0, "too small buffer\n");
338				continue;
339			}
340			err = usbd_do_request(udev, NULL, &req, buf);
341		} else {
342			if (len > (sizeof(setup[0]) - 8)) {
343				DPRINTFN(0, "too small buffer\n");
344				continue;
345			}
346			err = usbd_do_request(udev, NULL, &req,
347			    __DECONST(uint8_t *, &setup[n][8]));
348		}
349		if (err) {
350			DPRINTFN(1, "request %u failed\n",
351			    (unsigned int)n);
352			/*
353			 * Some of the requests will fail. Stop doing
354			 * requests when we are getting timeouts so
355			 * that we don't block the explore/attach
356			 * thread forever.
357			 */
358			if (err == USB_ERR_TIMEOUT)
359				break;
360		}
361	}
362}
363
364static int
365u3g_lookup_huawei(struct usb_attach_arg *uaa)
366{
367	/* Calling the lookup function will also set the driver info! */
368	return (usbd_lookup_id_by_uaa(u3g_devs, sizeof(u3g_devs), uaa));
369}
370
371/*
372 * The following function handles 3G modem devices (E220, Mobile,
373 * etc.) with auto-install flash disks for Windows/MacOSX on the first
374 * interface.  After some command or some delay they change appearance
375 * to a modem.
376 */
377static usb_error_t
378u3g_test_huawei_autoinst(struct usb_device *udev,
379    struct usb_attach_arg *uaa)
380{
381	struct usb_interface *iface;
382	struct usb_interface_descriptor *id;
383	uint32_t flags;
384
385	if (udev == NULL) {
386		return (USB_ERR_INVAL);
387	}
388	iface = usbd_get_iface(udev, 0);
389	if (iface == NULL) {
390		return (USB_ERR_INVAL);
391	}
392	id = iface->idesc;
393	if (id == NULL) {
394		return (USB_ERR_INVAL);
395	}
396	if (id->bInterfaceClass != UICLASS_MASS) {
397		return (USB_ERR_INVAL);
398	}
399	if (u3g_lookup_huawei(uaa)) {
400		/* no device match */
401		return (USB_ERR_INVAL);
402	}
403	flags = USB_GET_DRIVER_INFO(uaa);
404
405	if (flags & U3GFL_HUAWEI_INIT) {
406		u3g_huawei_init(udev);
407	} else if (flags & U3GFL_SCSI_EJECT) {
408		return (usb_test_autoinstall(udev, 0, 1));
409	} else if (flags & U3GFL_SIERRA_INIT) {
410		u3g_sierra_init(udev);
411	} else {
412		/* no quirks */
413		return (USB_ERR_INVAL);
414	}
415	return (0);			/* success */
416}
417
418static int
419u3g_driver_loaded(struct module *mod, int what, void *arg)
420{
421	switch (what) {
422	case MOD_LOAD:
423		/* register our autoinstall handler */
424		usb_test_huawei_autoinst_p = &u3g_test_huawei_autoinst;
425		break;
426	case MOD_UNLOAD:
427		usb_test_huawei_unload(NULL);
428		break;
429	default:
430		return (EOPNOTSUPP);
431	}
432 	return (0);
433}
434
435static int
436u3g_probe(device_t self)
437{
438	struct usb_attach_arg *uaa = device_get_ivars(self);
439
440	if (uaa->usb_mode != USB_MODE_HOST) {
441		return (ENXIO);
442	}
443	if (uaa->info.bConfigIndex != U3G_CONFIG_INDEX) {
444		return (ENXIO);
445	}
446	if (uaa->info.bInterfaceClass != UICLASS_VENDOR) {
447		return (ENXIO);
448	}
449	return (u3g_lookup_huawei(uaa));
450}
451
452static int
453u3g_attach(device_t dev)
454{
455	struct usb_config u3g_config_tmp[U3G_N_TRANSFER];
456	struct usb_attach_arg *uaa = device_get_ivars(dev);
457	struct u3g_softc *sc = device_get_softc(dev);
458	struct usb_interface *iface;
459	struct usb_interface_descriptor *id;
460	uint32_t iface_valid;
461	int error, flags, nports;
462	int ep, n;
463	uint8_t i;
464
465	DPRINTF("sc=%p\n", sc);
466
467	flags = USB_GET_DRIVER_INFO(uaa);
468
469	if (flags & U3GFL_SAEL_M460_INIT)
470		u3g_sael_m460_init(uaa->device);
471
472	/* copy in USB config */
473	for (n = 0; n != U3G_N_TRANSFER; n++)
474		u3g_config_tmp[n] = u3g_config[n];
475
476	device_set_usb_desc(dev);
477	mtx_init(&sc->sc_mtx, "u3g", NULL, MTX_DEF);
478
479	sc->sc_udev = uaa->device;
480
481	/* Claim all interfaces on the device */
482	iface_valid = 0;
483	for (i = uaa->info.bIfaceIndex; i < USB_IFACE_MAX; i++) {
484		iface = usbd_get_iface(uaa->device, i);
485		if (iface == NULL)
486			break;
487		id = usbd_get_interface_descriptor(iface);
488		if (id == NULL || id->bInterfaceClass != UICLASS_VENDOR)
489			continue;
490		usbd_set_parent_iface(uaa->device, i, uaa->info.bIfaceIndex);
491		iface_valid |= (1<<i);
492	}
493
494	i = 0;		/* interface index */
495	ep = 0;		/* endpoint index */
496	nports = 0;	/* number of ports */
497	while (i < USB_IFACE_MAX) {
498		if ((iface_valid & (1<<i)) == 0) {
499			i++;
500			continue;
501		}
502
503		/* update BULK endpoint index */
504		for (n = 0; n < U3G_N_TRANSFER; n++)
505			u3g_config_tmp[n].ep_index = ep;
506
507		/* try to allocate a set of BULK endpoints */
508		error = usbd_transfer_setup(uaa->device, &i,
509		    sc->sc_xfer[nports], u3g_config_tmp, U3G_N_TRANSFER,
510		    &sc->sc_ucom[nports], &sc->sc_mtx);
511		if (error) {
512			/* next interface */
513			i++;
514			ep = 0;
515			continue;
516		}
517
518		/* set stall by default */
519		mtx_lock(&sc->sc_mtx);
520		usbd_xfer_set_stall(sc->sc_xfer[nports][U3G_BULK_WR]);
521		usbd_xfer_set_stall(sc->sc_xfer[nports][U3G_BULK_RD]);
522		mtx_unlock(&sc->sc_mtx);
523
524		nports++;	/* found one port */
525		ep++;
526		if (nports == U3G_MAXPORTS)
527			break;
528	}
529	if (nports == 0) {
530		device_printf(dev, "no ports found\n");
531		goto detach;
532	}
533	sc->sc_numports = nports;
534
535	error = ucom_attach(&sc->sc_super_ucom, sc->sc_ucom,
536	    sc->sc_numports, sc, &u3g_callback, &sc->sc_mtx);
537	if (error) {
538		DPRINTF("ucom_attach failed\n");
539		goto detach;
540	}
541	if (sc->sc_numports > 1)
542		device_printf(dev, "Found %u ports.\n", sc->sc_numports);
543	return (0);
544
545detach:
546	u3g_detach(dev);
547	return (ENXIO);
548}
549
550static int
551u3g_detach(device_t dev)
552{
553	struct u3g_softc *sc = device_get_softc(dev);
554	uint8_t m;
555
556	DPRINTF("sc=%p\n", sc);
557
558	/* NOTE: It is not dangerous to detach more ports than attached! */
559	ucom_detach(&sc->sc_super_ucom, sc->sc_ucom, U3G_MAXPORTS);
560
561	for (m = 0; m != U3G_MAXPORTS; m++)
562		usbd_transfer_unsetup(sc->sc_xfer[m], U3G_N_TRANSFER);
563	mtx_destroy(&sc->sc_mtx);
564
565	return (0);
566}
567
568static void
569u3g_start_read(struct ucom_softc *ucom)
570{
571	struct u3g_softc *sc = ucom->sc_parent;
572
573	/* start read endpoint */
574	usbd_transfer_start(sc->sc_xfer[ucom->sc_local_unit][U3G_BULK_RD]);
575	return;
576}
577
578static void
579u3g_stop_read(struct ucom_softc *ucom)
580{
581	struct u3g_softc *sc = ucom->sc_parent;
582
583	/* stop read endpoint */
584	usbd_transfer_stop(sc->sc_xfer[ucom->sc_local_unit][U3G_BULK_RD]);
585	return;
586}
587
588static void
589u3g_start_write(struct ucom_softc *ucom)
590{
591	struct u3g_softc *sc = ucom->sc_parent;
592
593	usbd_transfer_start(sc->sc_xfer[ucom->sc_local_unit][U3G_BULK_WR]);
594	return;
595}
596
597static void
598u3g_stop_write(struct ucom_softc *ucom)
599{
600	struct u3g_softc *sc = ucom->sc_parent;
601
602	usbd_transfer_stop(sc->sc_xfer[ucom->sc_local_unit][U3G_BULK_WR]);
603	return;
604}
605
606static void
607u3g_write_callback(struct usb_xfer *xfer, usb_error_t error)
608{
609	struct ucom_softc *ucom = usbd_xfer_softc(xfer);
610	struct usb_page_cache *pc;
611	uint32_t actlen;
612
613	switch (USB_GET_STATE(xfer)) {
614	case USB_ST_TRANSFERRED:
615	case USB_ST_SETUP:
616tr_setup:
617		pc = usbd_xfer_get_frame(xfer, 0);
618		if (ucom_get_data(ucom, pc, 0, U3G_BSIZE, &actlen)) {
619			usbd_xfer_set_frame_len(xfer, 0, actlen);
620			usbd_transfer_submit(xfer);
621		}
622		break;
623
624	default:			/* Error */
625		if (error != USB_ERR_CANCELLED) {
626			/* do a builtin clear-stall */
627			usbd_xfer_set_stall(xfer);
628			goto tr_setup;
629		}
630		break;
631	}
632	return;
633}
634
635static void
636u3g_read_callback(struct usb_xfer *xfer, usb_error_t error)
637{
638	struct ucom_softc *ucom = usbd_xfer_softc(xfer);
639	struct usb_page_cache *pc;
640	int actlen;
641
642	usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
643
644	switch (USB_GET_STATE(xfer)) {
645	case USB_ST_TRANSFERRED:
646		pc = usbd_xfer_get_frame(xfer, 0);
647		ucom_put_data(ucom, pc, 0, actlen);
648
649	case USB_ST_SETUP:
650tr_setup:
651		usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
652		usbd_transfer_submit(xfer);
653		break;
654
655	default:			/* Error */
656		if (error != USB_ERR_CANCELLED) {
657			/* do a builtin clear-stall */
658			usbd_xfer_set_stall(xfer);
659			goto tr_setup;
660		}
661		break;
662	}
663	return;
664}
665