2 * Copyright (c) 1996-2000 Whistle Communications, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of author nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY NICK HIBMA AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 /* Driver for arbitrary double bulk pipe devices.
35 * The driver assumes that there will be the same driver on the other side.
37 * XXX Some more information on what the framing of the IP packets looks like.
39 * To take full advantage of bulk transmission, packets should be chosen
40 * between 1k and 5k in size (1k to make sure the sending side starts
41 * streaming, and <5k to avoid overflowing the system with small TDs).
45 /* probe/attach/detach:
46 * Connect the driver to the hardware and netgraph
48 * The reason we submit a bulk in transfer is that USB does not know about
49 * interrupts. The bulk transfer continuously polls the device for data.
50 * While the device has no data available, the device NAKs the TDs. As soon
51 * as there is data, the transfer happens and the data comes flowing in.
53 * In case you were wondering, interrupt transfers happen exactly that way.
54 * It therefore doesn't make sense to use the interrupt pipe to signal
55 * 'data ready' and then schedule a bulk transfer to fetch it. That would
56 * incur a 2ms delay at least, without reducing bandwidth requirements.
60 #include <sys/stdint.h>
61 #include <sys/stddef.h>
62 #include <sys/param.h>
63 #include <sys/queue.h>
64 #include <sys/types.h>
65 #include <sys/systm.h>
66 #include <sys/kernel.h>
68 #include <sys/linker_set.h>
69 #include <sys/module.h>
71 #include <sys/mutex.h>
72 #include <sys/condvar.h>
73 #include <sys/sysctl.h>
75 #include <sys/unistd.h>
76 #include <sys/callout.h>
77 #include <sys/malloc.h>
80 #include <dev/usb/usb.h>
81 #include <dev/usb/usbdi.h>
82 #include <dev/usb/usbdi_util.h>
85 #define USB_DEBUG_VAR udbp_debug
86 #include <dev/usb/usb_debug.h>
90 #include <netgraph/ng_message.h>
91 #include <netgraph/netgraph.h>
92 #include <netgraph/ng_parse.h>
93 #include <netgraph/bluetooth/include/ng_bluetooth.h>
95 #include <dev/usb/misc/udbp.h>
98 static int udbp_debug = 0;
100 SYSCTL_NODE(_hw_usb, OID_AUTO, udbp, CTLFLAG_RW, 0, "USB udbp");
101 SYSCTL_INT(_hw_usb_udbp, OID_AUTO, debug, CTLFLAG_RW,
102 &udbp_debug, 0, "udbp debug level");
105 #define UDBP_TIMEOUT 2000 /* timeout on outbound transfers, in
107 #define UDBP_BUFFERSIZE MCLBYTES /* maximum number of bytes in one
111 #define UDBP_T_WR_CS 2
112 #define UDBP_T_RD_CS 3
114 #define UDBP_Q_MAXLEN 50
119 struct ng_bt_mbufq sc_xmitq_hipri; /* hi-priority transmit queue */
120 struct ng_bt_mbufq sc_xmitq; /* low-priority transmit queue */
122 struct usb_xfer *sc_xfer[UDBP_T_MAX];
123 node_p sc_node; /* back pointer to node */
124 hook_p sc_hook; /* pointer to the hook */
125 struct mbuf *sc_bulk_in_buffer;
127 uint32_t sc_packets_in; /* packets in from downstream */
128 uint32_t sc_packets_out; /* packets out towards downstream */
131 #define UDBP_FLAG_READ_STALL 0x01 /* read transfer stalled */
132 #define UDBP_FLAG_WRITE_STALL 0x02 /* write transfer stalled */
139 static int udbp_modload(module_t mod, int event, void *data);
141 static device_probe_t udbp_probe;
142 static device_attach_t udbp_attach;
143 static device_detach_t udbp_detach;
145 static usb_callback_t udbp_bulk_read_callback;
146 static usb_callback_t udbp_bulk_read_clear_stall_callback;
147 static usb_callback_t udbp_bulk_write_callback;
148 static usb_callback_t udbp_bulk_write_clear_stall_callback;
150 static void udbp_bulk_read_complete(node_p, hook_p, void *, int);
152 static ng_constructor_t ng_udbp_constructor;
153 static ng_rcvmsg_t ng_udbp_rcvmsg;
154 static ng_shutdown_t ng_udbp_rmnode;
155 static ng_newhook_t ng_udbp_newhook;
156 static ng_connect_t ng_udbp_connect;
157 static ng_rcvdata_t ng_udbp_rcvdata;
158 static ng_disconnect_t ng_udbp_disconnect;
160 /* Parse type for struct ngudbpstat */
161 static const struct ng_parse_struct_field
162 ng_udbp_stat_type_fields[] = NG_UDBP_STATS_TYPE_INFO;
164 static const struct ng_parse_type ng_udbp_stat_type = {
165 &ng_parse_struct_type,
166 &ng_udbp_stat_type_fields
169 /* List of commands and how to convert arguments to/from ASCII */
170 static const struct ng_cmdlist ng_udbp_cmdlist[] = {
182 &ng_parse_int32_type,
188 /* Netgraph node type descriptor */
189 static struct ng_type ng_udbp_typestruct = {
190 .version = NG_ABI_VERSION,
191 .name = NG_UDBP_NODE_TYPE,
192 .constructor = ng_udbp_constructor,
193 .rcvmsg = ng_udbp_rcvmsg,
194 .shutdown = ng_udbp_rmnode,
195 .newhook = ng_udbp_newhook,
196 .connect = ng_udbp_connect,
197 .rcvdata = ng_udbp_rcvdata,
198 .disconnect = ng_udbp_disconnect,
199 .cmdlist = ng_udbp_cmdlist,
203 static const struct usb_config udbp_config[UDBP_T_MAX] = {
207 .endpoint = UE_ADDR_ANY,
208 .direction = UE_DIR_OUT,
209 .bufsize = UDBP_BUFFERSIZE,
210 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
211 .callback = &udbp_bulk_write_callback,
212 .timeout = UDBP_TIMEOUT,
217 .endpoint = UE_ADDR_ANY,
218 .direction = UE_DIR_IN,
219 .bufsize = UDBP_BUFFERSIZE,
220 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
221 .callback = &udbp_bulk_read_callback,
226 .endpoint = 0x00, /* Control pipe */
227 .direction = UE_DIR_ANY,
228 .bufsize = sizeof(struct usb_device_request),
229 .callback = &udbp_bulk_write_clear_stall_callback,
230 .timeout = 1000, /* 1 second */
231 .interval = 50, /* 50ms */
236 .endpoint = 0x00, /* Control pipe */
237 .direction = UE_DIR_ANY,
238 .bufsize = sizeof(struct usb_device_request),
239 .callback = &udbp_bulk_read_clear_stall_callback,
240 .timeout = 1000, /* 1 second */
241 .interval = 50, /* 50ms */
245 static devclass_t udbp_devclass;
247 static device_method_t udbp_methods[] = {
248 /* Device interface */
249 DEVMETHOD(device_probe, udbp_probe),
250 DEVMETHOD(device_attach, udbp_attach),
251 DEVMETHOD(device_detach, udbp_detach),
255 static driver_t udbp_driver = {
257 .methods = udbp_methods,
258 .size = sizeof(struct udbp_softc),
261 DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, udbp_modload, 0);
262 MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
263 MODULE_DEPEND(udbp, usb, 1, 1, 1);
266 udbp_modload(module_t mod, int event, void *data)
272 error = ng_newtype(&ng_udbp_typestruct);
274 printf("%s: Could not register "
275 "Netgraph node type, error=%d\n",
276 NG_UDBP_NODE_TYPE, error);
281 error = ng_rmtype(&ng_udbp_typestruct);
292 udbp_probe(device_t dev)
294 struct usb_attach_arg *uaa = device_get_ivars(dev);
296 if (uaa->usb_mode != USB_MODE_HOST) {
300 * XXX Julian, add the id of the device if you have one to test
301 * things with. run 'usbdevs -v' and note the 3 ID's that appear.
302 * The Vendor Id and Product Id are in hex and the Revision Id is in
303 * bcd. But as usual if the revision is 0x101 then you should
304 * compare the revision id in the device descriptor with 0x101 Or go
305 * search the file usbdevs.h. Maybe the device is already in there.
307 if (((uaa->info.idVendor == USB_VENDOR_NETCHIP) &&
308 (uaa->info.idProduct == USB_PRODUCT_NETCHIP_TURBOCONNECT)))
311 if (((uaa->info.idVendor == USB_VENDOR_PROLIFIC) &&
312 ((uaa->info.idProduct == USB_PRODUCT_PROLIFIC_PL2301) ||
313 (uaa->info.idProduct == USB_PRODUCT_PROLIFIC_PL2302))))
316 if ((uaa->info.idVendor == USB_VENDOR_ANCHOR) &&
317 (uaa->info.idProduct == USB_PRODUCT_ANCHOR_EZLINK))
320 if ((uaa->info.idVendor == USB_VENDOR_GENESYS) &&
321 (uaa->info.idProduct == USB_PRODUCT_GENESYS_GL620USB))
328 udbp_attach(device_t dev)
330 struct usb_attach_arg *uaa = device_get_ivars(dev);
331 struct udbp_softc *sc = device_get_softc(dev);
334 device_set_usb_desc(dev);
336 snprintf(sc->sc_name, sizeof(sc->sc_name),
337 "%s", device_get_nameunit(dev));
339 mtx_init(&sc->sc_mtx, "udbp lock", NULL, MTX_DEF | MTX_RECURSE);
341 error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex,
342 sc->sc_xfer, udbp_config, UDBP_T_MAX, sc, &sc->sc_mtx);
344 DPRINTF("error=%s\n", usbd_errstr(error));
347 NG_BT_MBUFQ_INIT(&sc->sc_xmitq, UDBP_Q_MAXLEN);
349 NG_BT_MBUFQ_INIT(&sc->sc_xmitq_hipri, UDBP_Q_MAXLEN);
351 /* create Netgraph node */
353 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) {
354 printf("%s: Could not create Netgraph node\n",
361 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) {
362 printf("%s: Could not name node\n",
364 NG_NODE_UNREF(sc->sc_node);
368 NG_NODE_SET_PRIVATE(sc->sc_node, sc);
370 /* the device is now operational */
372 return (0); /* success */
376 return (ENOMEM); /* failure */
380 udbp_detach(device_t dev)
382 struct udbp_softc *sc = device_get_softc(dev);
384 /* destroy Netgraph node */
386 if (sc->sc_node != NULL) {
387 NG_NODE_SET_PRIVATE(sc->sc_node, NULL);
388 ng_rmnode_self(sc->sc_node);
391 /* free USB transfers, if any */
393 usbd_transfer_unsetup(sc->sc_xfer, UDBP_T_MAX);
395 mtx_destroy(&sc->sc_mtx);
399 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq);
400 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq_hipri);
404 if (sc->sc_bulk_in_buffer) {
405 m_freem(sc->sc_bulk_in_buffer);
406 sc->sc_bulk_in_buffer = NULL;
408 return (0); /* success */
412 udbp_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
414 struct udbp_softc *sc = usbd_xfer_softc(xfer);
415 struct usb_page_cache *pc;
419 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
421 switch (USB_GET_STATE(xfer)) {
422 case USB_ST_TRANSFERRED:
424 /* allocate new mbuf */
426 MGETHDR(m, M_DONTWAIT, MT_DATA);
431 MCLGET(m, M_DONTWAIT);
433 if (!(m->m_flags & M_EXT)) {
437 m->m_pkthdr.len = m->m_len = actlen;
439 pc = usbd_xfer_get_frame(xfer, 0);
440 usbd_copy_out(pc, 0, m->m_data, actlen);
442 sc->sc_bulk_in_buffer = m;
444 DPRINTF("received package %d bytes\n", actlen);
448 if (sc->sc_bulk_in_buffer) {
449 ng_send_fn(sc->sc_node, NULL, &udbp_bulk_read_complete, NULL, 0);
452 if (sc->sc_flags & UDBP_FLAG_READ_STALL) {
453 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]);
456 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
457 usbd_transfer_submit(xfer);
461 if (error != USB_ERR_CANCELLED) {
462 /* try to clear stall first */
463 sc->sc_flags |= UDBP_FLAG_READ_STALL;
464 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]);
472 udbp_bulk_read_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
474 struct udbp_softc *sc = usbd_xfer_softc(xfer);
475 struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_RD];
477 if (usbd_clear_stall_callback(xfer, xfer_other)) {
478 DPRINTF("stall cleared\n");
479 sc->sc_flags &= ~UDBP_FLAG_READ_STALL;
480 usbd_transfer_start(xfer_other);
485 udbp_bulk_read_complete(node_p node, hook_p hook, void *arg1, int arg2)
487 struct udbp_softc *sc = NG_NODE_PRIVATE(node);
494 mtx_lock(&sc->sc_mtx);
496 m = sc->sc_bulk_in_buffer;
500 sc->sc_bulk_in_buffer = NULL;
502 if ((sc->sc_hook == NULL) ||
503 NG_HOOK_NOT_VALID(sc->sc_hook)) {
504 DPRINTF("No upstream hook\n");
509 NG_SEND_DATA_ONLY(error, sc->sc_hook, m);
517 /* start USB bulk-in transfer, if not already started */
519 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]);
521 mtx_unlock(&sc->sc_mtx);
525 udbp_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
527 struct udbp_softc *sc = usbd_xfer_softc(xfer);
528 struct usb_page_cache *pc;
531 switch (USB_GET_STATE(xfer)) {
532 case USB_ST_TRANSFERRED:
534 sc->sc_packets_out++;
537 if (sc->sc_flags & UDBP_FLAG_WRITE_STALL) {
538 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]);
541 /* get next mbuf, if any */
543 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq_hipri, m);
545 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq, m);
547 DPRINTF("Data queue is empty\n");
551 if (m->m_pkthdr.len > MCLBYTES) {
552 DPRINTF("truncating large packet "
553 "from %d to %d bytes\n", m->m_pkthdr.len,
555 m->m_pkthdr.len = MCLBYTES;
557 pc = usbd_xfer_get_frame(xfer, 0);
558 usbd_m_copy_in(pc, 0, m, 0, m->m_pkthdr.len);
560 usbd_xfer_set_frame_len(xfer, 0, m->m_pkthdr.len);
562 DPRINTF("packet out: %d bytes\n", m->m_pkthdr.len);
566 usbd_transfer_submit(xfer);
570 if (error != USB_ERR_CANCELLED) {
571 /* try to clear stall first */
572 sc->sc_flags |= UDBP_FLAG_WRITE_STALL;
573 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]);
581 udbp_bulk_write_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
583 struct udbp_softc *sc = usbd_xfer_softc(xfer);
584 struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_WR];
586 if (usbd_clear_stall_callback(xfer, xfer_other)) {
587 DPRINTF("stall cleared\n");
588 sc->sc_flags &= ~UDBP_FLAG_WRITE_STALL;
589 usbd_transfer_start(xfer_other);
593 /***********************************************************************
594 * Start of Netgraph methods
595 **********************************************************************/
598 * If this is a device node so this work is done in the attach()
599 * routine and the constructor will return EINVAL as you should not be able
600 * to create nodes that depend on hardware (unless you can add the hardware :)
603 ng_udbp_constructor(node_p node)
609 * Give our ok for a hook to be added...
610 * If we are not running this might kick a device into life.
611 * Possibly decode information out of the hook name.
612 * Add the hook's private info to the hook structure.
613 * (if we had some). In this example, we assume that there is a
614 * an array of structs, called 'channel' in the private info,
615 * one for each active channel. The private
616 * pointer of each hook points to the appropriate UDBP_hookinfo struct
617 * so that the source of an input packet is easily identified.
620 ng_udbp_newhook(node_p node, hook_p hook, const char *name)
622 struct udbp_softc *sc = NG_NODE_PRIVATE(node);
625 if (strcmp(name, NG_UDBP_HOOK_NAME)) {
628 mtx_lock(&sc->sc_mtx);
630 if (sc->sc_hook != NULL) {
634 NG_HOOK_SET_PRIVATE(hook, NULL);
637 mtx_unlock(&sc->sc_mtx);
643 * Get a netgraph control message.
644 * Check it is one we understand. If needed, send a response.
645 * We could save the address for an async action later, but don't here.
646 * Always free the message.
647 * The response should be in a malloc'd region that the caller can 'free'.
648 * A response is not required.
649 * Theoretically you could respond defferently to old message types if
650 * the cookie in the header didn't match what we consider to be current
651 * (so that old userland programs could continue to work).
654 ng_udbp_rcvmsg(node_p node, item_p item, hook_p lasthook)
656 struct udbp_softc *sc = NG_NODE_PRIVATE(node);
657 struct ng_mesg *resp = NULL;
661 NGI_GET_MSG(item, msg);
662 /* Deal with message according to cookie and command */
663 switch (msg->header.typecookie) {
664 case NGM_UDBP_COOKIE:
665 switch (msg->header.cmd) {
666 case NGM_UDBP_GET_STATUS:
668 struct ngudbpstat *stats;
670 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT);
675 stats = (struct ngudbpstat *)resp->data;
676 mtx_lock(&sc->sc_mtx);
677 stats->packets_in = sc->sc_packets_in;
678 stats->packets_out = sc->sc_packets_out;
679 mtx_unlock(&sc->sc_mtx);
682 case NGM_UDBP_SET_FLAG:
683 if (msg->header.arglen != sizeof(uint32_t)) {
687 DPRINTF("flags = 0x%08x\n",
688 *((uint32_t *)msg->data));
691 error = EINVAL; /* unknown command */
696 error = EINVAL; /* unknown cookie type */
700 /* Take care of synchronous response, if any */
701 NG_RESPOND_MSG(error, node, item, resp);
707 * Accept data from the hook and queue it for output.
710 ng_udbp_rcvdata(hook_p hook, item_p item)
712 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
713 struct ng_bt_mbufq *queue_ptr;
715 struct ng_tag_prio *ptag;
726 * Now queue the data for when it can be sent
728 ptag = (void *)m_tag_locate(m, NGM_GENERIC_COOKIE,
731 if (ptag && (ptag->priority > NG_PRIO_CUTOFF))
732 queue_ptr = &sc->sc_xmitq_hipri;
734 queue_ptr = &sc->sc_xmitq;
736 mtx_lock(&sc->sc_mtx);
738 if (NG_BT_MBUFQ_FULL(queue_ptr)) {
739 NG_BT_MBUFQ_DROP(queue_ptr);
743 NG_BT_MBUFQ_ENQUEUE(queue_ptr, m);
745 * start bulk-out transfer, if not already started:
747 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]);
751 mtx_unlock(&sc->sc_mtx);
757 * Do local shutdown processing..
758 * We are a persistant device, we refuse to go away, and
759 * only remove our links and reset ourself.
762 ng_udbp_rmnode(node_p node)
764 struct udbp_softc *sc = NG_NODE_PRIVATE(node);
766 /* Let old node go */
767 NG_NODE_SET_PRIVATE(node, NULL);
768 NG_NODE_UNREF(node); /* forget it ever existed */
773 /* Create Netgraph node */
774 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) {
775 printf("%s: Could not create Netgraph node\n",
781 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) {
782 printf("%s: Could not name Netgraph node\n",
784 NG_NODE_UNREF(sc->sc_node);
788 NG_NODE_SET_PRIVATE(sc->sc_node, sc);
792 mtx_unlock(&sc->sc_mtx);
798 * This is called once we've already connected a new hook to the other node.
799 * It gives us a chance to balk at the last minute.
802 ng_udbp_connect(hook_p hook)
804 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
806 /* probably not at splnet, force outward queueing */
807 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
809 mtx_lock(&sc->sc_mtx);
811 sc->sc_flags |= (UDBP_FLAG_READ_STALL |
812 UDBP_FLAG_WRITE_STALL);
814 /* start bulk-in transfer */
815 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]);
817 /* start bulk-out transfer */
818 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]);
820 mtx_unlock(&sc->sc_mtx);
828 * For this type, removal of the last link destroys the node
831 ng_udbp_disconnect(hook_p hook)
833 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
838 mtx_lock(&sc->sc_mtx);
840 if (hook != sc->sc_hook) {
844 /* stop bulk-in transfer */
845 usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD_CS]);
846 usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD]);
848 /* stop bulk-out transfer */
849 usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR_CS]);
850 usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR]);
853 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq);
854 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq_hipri);
856 if (sc->sc_bulk_in_buffer) {
857 m_freem(sc->sc_bulk_in_buffer);
858 sc->sc_bulk_in_buffer = NULL;
863 mtx_unlock(&sc->sc_mtx);
865 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
866 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
867 ng_rmnode_self(NG_HOOK_NODE(hook));