2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (C) 2012 Ben Gray <bgray@freebsd.org>.
5 * Copyright (C) 2018 The FreeBSD Foundation.
6 * Copyright (c) 2019 Edward Tomasz Napierala <trasz@FreeBSD.org>
8 * This software was developed by Arshan Khanifar <arshankhanifar@gmail.com>
9 * under sponsorship from the FreeBSD Foundation.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Universal Serial Bus Communications Class Subclass Specification
35 * for Ethernet Emulation Model Devices:
37 * https://usb.org/sites/default/files/CDC_EEM10.pdf
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
43 #include <sys/gsb_crc32.h>
44 #include <sys/eventhandler.h>
45 #include <sys/stdint.h>
46 #include <sys/stddef.h>
47 #include <sys/queue.h>
48 #include <sys/systm.h>
49 #include <sys/socket.h>
50 #include <sys/kernel.h>
52 #include <sys/module.h>
54 #include <sys/mutex.h>
55 #include <sys/condvar.h>
56 #include <sys/sysctl.h>
58 #include <sys/unistd.h>
59 #include <sys/callout.h>
60 #include <sys/malloc.h>
64 #include <net/if_var.h>
66 #include <dev/usb/usb.h>
67 #include <dev/usb/usbdi.h>
68 #include <dev/usb/usbdi_util.h>
69 #include <dev/usb/usb_cdc.h>
72 #define USB_DEBUG_VAR cdceem_debug
73 #include <dev/usb/usb_debug.h>
74 #include <dev/usb/usb_process.h>
75 #include <dev/usb/usb_msctest.h>
78 #include <dev/usb/net/usb_ethernet.h>
80 #define CDCEEM_FRAMES_MAX 1
81 #define CDCEEM_ECHO_MAX 1024
83 #define CDCEEM_ECHO_PAYLOAD \
84 "ICH DALEKOPIS FALSZUJE GDY PROBY XQV NIE WYTRZYMUJE 1234567890"
93 struct usb_ether sc_ue;
96 struct usb_xfer *sc_xfer[CDCEEM_N_TRANSFER];
98 char sc_echo_buffer[CDCEEM_ECHO_MAX];
101 #define CDCEEM_SC_FLAGS_ECHO_RESPONSE_PENDING 0x1
102 #define CDCEEM_SC_FLAGS_ECHO_PENDING 0x2
104 static SYSCTL_NODE(_hw_usb, OID_AUTO, cdceem, CTLFLAG_RW, 0, "USB CDC EEM");
105 static int cdceem_debug = 1;
106 SYSCTL_INT(_hw_usb_cdceem, OID_AUTO, debug, CTLFLAG_RWTUN,
107 &cdceem_debug, 0, "Debug level");
108 static int cdceem_send_echoes = 0;
109 SYSCTL_INT(_hw_usb_cdceem, OID_AUTO, send_echoes, CTLFLAG_RWTUN,
110 &cdceem_send_echoes, 0, "Send an Echo command");
111 static int cdceem_send_fake_crc = 0;
112 SYSCTL_INT(_hw_usb_cdceem, OID_AUTO, send_fake_crc, CTLFLAG_RWTUN,
113 &cdceem_send_fake_crc, 0, "Use 0xdeadbeef instead of CRC");
115 #define CDCEEM_DEBUG(S, X, ...) \
117 if (cdceem_debug > 1) { \
118 device_printf(S->sc_ue.ue_dev, "%s: " X "\n", \
119 __func__, ## __VA_ARGS__); \
123 #define CDCEEM_WARN(S, X, ...) \
125 if (cdceem_debug > 0) { \
126 device_printf(S->sc_ue.ue_dev, \
127 "WARNING: %s: " X "\n", \
128 __func__, ## __VA_ARGS__); \
132 #define CDCEEM_LOCK(X) mtx_lock(&(X)->sc_mtx)
133 #define CDCEEM_UNLOCK(X) mtx_unlock(&(X)->sc_mtx)
135 #define CDCEEM_TYPE_CMD (0x1 << 15)
137 #define CDCEEM_CMD_MASK (0x7 << 11)
139 #define CDCEEM_CMD_ECHO (0x0 << 11)
140 #define CDCEEM_CMD_ECHO_RESPONSE (0x1 << 11)
141 #define CDCEEM_CMD_SUSPEND_HINT (0x2 << 11)
142 #define CDCEEM_CMD_RESPONSE_HINT (0x3 << 11)
143 #define CDCEEM_CMD_RESPONSE_COMPLETE_HINT (0x4 << 11)
144 #define CDCEEM_CMD_TICKLE (0x5 << 11)
146 #define CDCEEM_CMD_RESERVED (0x1 << 14)
148 #define CDCEEM_ECHO_LEN_MASK 0x3ff
150 #define CDCEEM_DATA_CRC (0x1 << 14)
151 #define CDCEEM_DATA_LEN_MASK 0x3fff
153 static device_probe_t cdceem_probe;
154 static device_attach_t cdceem_attach;
155 static device_detach_t cdceem_detach;
156 static device_suspend_t cdceem_suspend;
157 static device_resume_t cdceem_resume;
159 static usb_callback_t cdceem_bulk_write_callback;
160 static usb_callback_t cdceem_bulk_read_callback;
162 static uether_fn_t cdceem_attach_post;
163 static uether_fn_t cdceem_init;
164 static uether_fn_t cdceem_stop;
165 static uether_fn_t cdceem_start;
166 static uether_fn_t cdceem_setmulti;
167 static uether_fn_t cdceem_setpromisc;
169 static uint32_t cdceem_m_crc32(struct mbuf *, uint32_t, uint32_t);
171 static const struct usb_config cdceem_config[CDCEEM_N_TRANSFER] = {
174 .endpoint = UE_ADDR_ANY,
175 .direction = UE_DIR_TX,
176 .bufsize = 16 * (MCLBYTES + 16),
177 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
178 .callback = cdceem_bulk_write_callback,
179 .timeout = 10000, /* 10 seconds */
180 .usb_mode = USB_MODE_DUAL,
185 .endpoint = UE_ADDR_ANY,
186 .direction = UE_DIR_RX,
187 .bufsize = 20480, /* bytes */
188 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
189 .callback = cdceem_bulk_read_callback,
190 .timeout = 0, /* no timeout */
191 .usb_mode = USB_MODE_DUAL,
195 static device_method_t cdceem_methods[] = {
196 /* Device interface */
197 DEVMETHOD(device_probe, cdceem_probe),
198 DEVMETHOD(device_attach, cdceem_attach),
199 DEVMETHOD(device_detach, cdceem_detach),
200 DEVMETHOD(device_suspend, cdceem_suspend),
201 DEVMETHOD(device_resume, cdceem_resume),
206 static driver_t cdceem_driver = {
208 .methods = cdceem_methods,
209 .size = sizeof(struct cdceem_softc),
212 static devclass_t cdceem_devclass;
214 static const STRUCT_USB_DUAL_ID cdceem_dual_devs[] = {
215 {USB_IFACE_CLASS(UICLASS_CDC),
216 USB_IFACE_SUBCLASS(UISUBCLASS_ETHERNET_EMULATION_MODEL),
220 DRIVER_MODULE(cdceem, uhub, cdceem_driver, cdceem_devclass, NULL, NULL);
221 MODULE_VERSION(cdceem, 1);
222 MODULE_DEPEND(cdceem, uether, 1, 1, 1);
223 MODULE_DEPEND(cdceem, usb, 1, 1, 1);
224 MODULE_DEPEND(cdceem, ether, 1, 1, 1);
225 USB_PNP_DUAL_INFO(cdceem_dual_devs);
227 static const struct usb_ether_methods cdceem_ue_methods = {
228 .ue_attach_post = cdceem_attach_post,
229 .ue_start = cdceem_start,
230 .ue_init = cdceem_init,
231 .ue_stop = cdceem_stop,
232 .ue_setmulti = cdceem_setmulti,
233 .ue_setpromisc = cdceem_setpromisc,
237 cdceem_probe(device_t dev)
239 struct usb_attach_arg *uaa;
242 uaa = device_get_ivars(dev);
243 error = usbd_lookup_id_by_uaa(cdceem_dual_devs,
244 sizeof(cdceem_dual_devs), uaa);
250 cdceem_attach_post(struct usb_ether *ue)
257 cdceem_attach(device_t dev)
259 struct cdceem_softc *sc;
260 struct usb_ether *ue;
261 struct usb_attach_arg *uaa;
265 sc = device_get_softc(dev);
267 uaa = device_get_ivars(dev);
269 device_set_usb_desc(dev);
271 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF);
273 /* Setup the endpoints. */
275 error = usbd_transfer_setup(uaa->device, &iface_index, sc->sc_xfer,
276 cdceem_config, CDCEEM_N_TRANSFER, sc, &sc->sc_mtx);
279 "allocating USB transfers failed, error %d", error);
280 mtx_destroy(&sc->sc_mtx);
284 /* Random MAC address. */
285 arc4rand(ue->ue_eaddr, ETHER_ADDR_LEN, 0);
286 ue->ue_eaddr[0] &= ~0x01; /* unicast */
287 ue->ue_eaddr[0] |= 0x02; /* locally administered */
291 ue->ue_udev = uaa->device;
292 ue->ue_mtx = &sc->sc_mtx;
293 ue->ue_methods = &cdceem_ue_methods;
295 error = uether_ifattach(ue);
297 CDCEEM_WARN(sc, "could not attach interface, error %d", error);
298 usbd_transfer_unsetup(sc->sc_xfer, CDCEEM_N_TRANSFER);
299 mtx_destroy(&sc->sc_mtx);
307 cdceem_detach(device_t dev)
309 struct cdceem_softc *sc = device_get_softc(dev);
310 struct usb_ether *ue = &sc->sc_ue;
312 /* Stop all USB transfers first. */
313 usbd_transfer_unsetup(sc->sc_xfer, CDCEEM_N_TRANSFER);
315 mtx_destroy(&sc->sc_mtx);
321 cdceem_handle_cmd(struct usb_xfer *xfer, uint16_t hdr, int *offp)
323 struct cdceem_softc *sc;
324 struct usb_page_cache *pc;
329 sc = usbd_xfer_softc(xfer);
330 pc = usbd_xfer_get_frame(xfer, 0);
331 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
333 if (hdr & CDCEEM_CMD_RESERVED) {
334 CDCEEM_WARN(sc, "received command header %#x "
335 "with Reserved bit set; ignoring", hdr);
339 switch (hdr & CDCEEM_CMD_MASK) {
340 case CDCEEM_CMD_ECHO:
341 pktlen = hdr & CDCEEM_ECHO_LEN_MASK;
342 CDCEEM_DEBUG(sc, "received Echo, length %d", pktlen);
344 if (pktlen > (actlen - off)) {
346 "bad Echo length %d, should be at most %d",
347 pktlen, actlen - off);
351 if (pktlen > sizeof(sc->sc_echo_buffer)) {
353 "Echo length %u too big, must be less than %zd",
354 pktlen, sizeof(sc->sc_echo_buffer));
358 sc->sc_flags |= CDCEEM_SC_FLAGS_ECHO_RESPONSE_PENDING;
359 sc->sc_echo_len = pktlen;
360 usbd_copy_out(pc, off, sc->sc_echo_buffer, pktlen);
364 case CDCEEM_CMD_ECHO_RESPONSE:
365 pktlen = hdr & CDCEEM_ECHO_LEN_MASK;
366 CDCEEM_DEBUG(sc, "received Echo Response, length %d", pktlen);
368 if (pktlen > (actlen - off)) {
370 "bad Echo Response length %d, "
371 "should be at most %d",
372 pktlen, actlen - off);
376 if (pktlen != sizeof(CDCEEM_ECHO_PAYLOAD)) {
377 CDCEEM_WARN(sc, "received Echo Response with bad "
378 "length %hu, should be %zd",
379 pktlen, sizeof(CDCEEM_ECHO_PAYLOAD));
383 usbd_copy_out(pc, off, sc->sc_echo_buffer, pktlen);
386 if (memcmp(sc->sc_echo_buffer, CDCEEM_ECHO_PAYLOAD,
387 sizeof(CDCEEM_ECHO_PAYLOAD)) != 0) {
389 "received Echo Response payload does not match");
391 CDCEEM_DEBUG(sc, "received Echo Response is valid");
395 case CDCEEM_CMD_SUSPEND_HINT:
396 CDCEEM_DEBUG(sc, "received SuspendHint; ignoring");
399 case CDCEEM_CMD_RESPONSE_HINT:
400 CDCEEM_DEBUG(sc, "received ResponseHint; ignoring");
403 case CDCEEM_CMD_RESPONSE_COMPLETE_HINT:
404 CDCEEM_DEBUG(sc, "received ResponseCompleteHint; ignoring");
407 case CDCEEM_CMD_TICKLE:
408 CDCEEM_DEBUG(sc, "received Tickle; ignoring");
413 "received unknown command %u, header %#x; ignoring",
414 (hdr & CDCEEM_CMD_MASK >> 11), hdr);
422 cdceem_handle_data(struct usb_xfer *xfer, uint16_t hdr, int *offp)
424 struct cdceem_softc *sc;
425 struct usb_page_cache *pc;
426 struct usb_ether *ue;
430 uint32_t computed_crc, received_crc;
434 sc = usbd_xfer_softc(xfer);
435 pc = usbd_xfer_get_frame(xfer, 0);
437 ifp = uether_getifp(ue);
438 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
440 pktlen = hdr & CDCEEM_DATA_LEN_MASK;
441 CDCEEM_DEBUG(sc, "received Data, CRC %s, length %d",
442 (hdr & CDCEEM_DATA_CRC) ? "valid" : "absent",
445 if (pktlen < ETHER_HDR_LEN) {
447 "bad ethernet frame length %d, should be at least %d",
448 pktlen, ETHER_HDR_LEN);
449 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
453 if (pktlen > (actlen - off)) {
455 "bad ethernet frame length %d, should be at most %d",
456 pktlen, actlen - off);
457 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
463 CDCEEM_WARN(sc, "uether_newbuf() failed");
464 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
468 pktlen -= 4; /* Subtract the CRC. */
469 usbd_copy_out(pc, off, mtod(m, uint8_t *), pktlen);
472 usbd_copy_out(pc, off, &received_crc, sizeof(received_crc));
473 off += sizeof(received_crc);
475 if (hdr & CDCEEM_DATA_CRC) {
476 computed_crc = cdceem_m_crc32(m, 0, pktlen);
478 computed_crc = be32toh(0xdeadbeef);
481 if (received_crc != computed_crc) {
483 "received Data packet with wrong CRC %#x, expected %#x",
484 received_crc, computed_crc);
485 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
489 CDCEEM_DEBUG(sc, "received correct CRC %#x", received_crc);
492 uether_rxmbuf(ue, m, pktlen);
497 cdceem_bulk_read_callback(struct usb_xfer *xfer, usb_error_t usb_error)
499 struct cdceem_softc *sc;
500 struct usb_page_cache *pc;
501 int actlen, aframes, off;
504 sc = usbd_xfer_softc(xfer);
505 usbd_xfer_status(xfer, &actlen, NULL, &aframes, NULL);
507 switch (USB_GET_STATE(xfer)) {
508 case USB_ST_TRANSFERRED:
510 "received %u bytes in %u frames", actlen, aframes);
512 pc = usbd_xfer_get_frame(xfer, 0);
515 while (off < actlen) {
516 usbd_copy_out(pc, off, &hdr, sizeof(hdr));
517 CDCEEM_DEBUG(sc, "hdr = %#x", hdr);
521 CDCEEM_DEBUG(sc, "received Zero Length EEM");
527 if ((hdr & CDCEEM_TYPE_CMD) != 0) {
528 cdceem_handle_cmd(xfer, hdr, &off);
530 cdceem_handle_data(xfer, hdr, &off);
533 KASSERT(off <= actlen,
534 ("%s: went past the buffer, off %d, actlen %d",
535 __func__, off, actlen));
540 CDCEEM_DEBUG(sc, "setup");
542 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
543 usbd_transfer_submit(xfer);
544 uether_rxflush(&sc->sc_ue);
548 CDCEEM_WARN(sc, "USB_ST_ERROR: %s", usbd_errstr(usb_error));
550 if (usb_error != USB_ERR_CANCELLED) {
551 /* try to clear stall first */
552 usbd_xfer_set_stall(xfer);
560 cdceem_send_echo(struct usb_xfer *xfer, int *offp)
562 struct cdceem_softc *sc;
563 struct usb_page_cache *pc;
568 sc = usbd_xfer_softc(xfer);
569 pc = usbd_xfer_get_frame(xfer, 0);
570 maxlen = usbd_xfer_max_len(xfer);
572 CDCEEM_DEBUG(sc, "sending Echo, length %zd",
573 sizeof(CDCEEM_ECHO_PAYLOAD));
575 KASSERT(off + sizeof(hdr) + sizeof(CDCEEM_ECHO_PAYLOAD) < maxlen,
576 ("%s: out of space; have %d, need %zd", __func__, maxlen,
577 off + sizeof(hdr) + sizeof(CDCEEM_ECHO_PAYLOAD)));
580 hdr |= CDCEEM_TYPE_CMD;
581 hdr |= CDCEEM_CMD_ECHO;
582 hdr |= sizeof(CDCEEM_ECHO_PAYLOAD);
583 CDCEEM_DEBUG(sc, "hdr = %#x", hdr);
586 usbd_copy_in(pc, off, &hdr, sizeof(hdr));
589 usbd_copy_in(pc, off, CDCEEM_ECHO_PAYLOAD,
590 sizeof(CDCEEM_ECHO_PAYLOAD));
591 off += sizeof(CDCEEM_ECHO_PAYLOAD);
593 sc->sc_flags &= ~CDCEEM_SC_FLAGS_ECHO_PENDING;
599 cdceem_send_echo_response(struct usb_xfer *xfer, int *offp)
601 struct cdceem_softc *sc;
602 struct usb_page_cache *pc;
607 sc = usbd_xfer_softc(xfer);
608 pc = usbd_xfer_get_frame(xfer, 0);
609 maxlen = usbd_xfer_max_len(xfer);
611 KASSERT(off + sizeof(hdr) + sc->sc_echo_len < maxlen,
612 ("%s: out of space; have %d, need %zd", __func__, maxlen,
613 off + sizeof(hdr) + sc->sc_echo_len));
615 CDCEEM_DEBUG(sc, "sending Echo Response, length %zd", sc->sc_echo_len);
618 hdr |= CDCEEM_TYPE_CMD;
619 hdr |= CDCEEM_CMD_ECHO_RESPONSE;
620 hdr |= sc->sc_echo_len;
621 CDCEEM_DEBUG(sc, "hdr = %#x", hdr);
624 usbd_copy_in(pc, off, &hdr, sizeof(hdr));
627 usbd_copy_in(pc, off, sc->sc_echo_buffer, sc->sc_echo_len);
628 off += sc->sc_echo_len;
630 sc->sc_flags &= ~CDCEEM_SC_FLAGS_ECHO_RESPONSE_PENDING;
637 cdceem_send_data(struct usb_xfer *xfer, int *offp)
639 struct cdceem_softc *sc;
640 struct usb_page_cache *pc;
648 sc = usbd_xfer_softc(xfer);
649 pc = usbd_xfer_get_frame(xfer, 0);
650 ifp = uether_getifp(&sc->sc_ue);
651 maxlen = usbd_xfer_max_len(xfer);
653 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
655 CDCEEM_DEBUG(sc, "no Data packets to send");
659 KASSERT((m->m_pkthdr.len & CDCEEM_DATA_LEN_MASK) == m->m_pkthdr.len,
660 ("%s: packet too long: %d, should be %d\n", __func__,
661 m->m_pkthdr.len, m->m_pkthdr.len & CDCEEM_DATA_LEN_MASK));
662 KASSERT(off + sizeof(hdr) + m->m_pkthdr.len + 4 < maxlen,
663 ("%s: out of space; have %d, need %zd", __func__, maxlen,
664 off + sizeof(hdr) + m->m_pkthdr.len + 4));
666 CDCEEM_DEBUG(sc, "sending Data, length %d + 4", m->m_pkthdr.len);
669 if (!cdceem_send_fake_crc)
670 hdr |= CDCEEM_DATA_CRC;
671 hdr |= (m->m_pkthdr.len + 4); /* +4 for CRC */
672 CDCEEM_DEBUG(sc, "hdr = %#x", hdr);
675 usbd_copy_in(pc, off, &hdr, sizeof(hdr));
678 usbd_m_copy_in(pc, off, m, 0, m->m_pkthdr.len);
679 off += m->m_pkthdr.len;
681 if (cdceem_send_fake_crc) {
682 crc = htobe32(0xdeadbeef);
684 crc = cdceem_m_crc32(m, 0, m->m_pkthdr.len);
686 CDCEEM_DEBUG(sc, "CRC = %#x", crc);
688 usbd_copy_in(pc, off, &crc, sizeof(crc));
691 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
694 * If there's a BPF listener, bounce a copy of this frame to it.
703 cdceem_bulk_write_callback(struct usb_xfer *xfer, usb_error_t usb_error)
705 struct cdceem_softc *sc;
707 int actlen, aframes, maxlen, off;
709 sc = usbd_xfer_softc(xfer);
710 maxlen = usbd_xfer_max_len(xfer);
712 switch (USB_GET_STATE(xfer)) {
713 case USB_ST_TRANSFERRED:
714 usbd_xfer_status(xfer, &actlen, NULL, &aframes, NULL);
715 CDCEEM_DEBUG(sc, "transferred %u bytes in %u frames",
720 CDCEEM_DEBUG(sc, "setup");
724 usbd_xfer_set_frame_offset(xfer, 0, 0);
726 if (sc->sc_flags & CDCEEM_SC_FLAGS_ECHO_PENDING) {
727 cdceem_send_echo(xfer, &off);
728 } else if (sc->sc_flags & CDCEEM_SC_FLAGS_ECHO_RESPONSE_PENDING) {
729 cdceem_send_echo_response(xfer, &off);
731 cdceem_send_data(xfer, &off);
734 KASSERT(off <= maxlen,
735 ("%s: went past the buffer, off %d, maxlen %d",
736 __func__, off, maxlen));
739 CDCEEM_DEBUG(sc, "starting transfer, length %d", off);
740 usbd_xfer_set_frame_len(xfer, 0, off);
741 usbd_transfer_submit(xfer);
743 CDCEEM_DEBUG(sc, "nothing to transfer");
749 CDCEEM_WARN(sc, "USB_ST_ERROR: %s", usbd_errstr(usb_error));
751 ifp = uether_getifp(&sc->sc_ue);
752 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
754 if (usb_error != USB_ERR_CANCELLED) {
755 /* try to clear stall first */
756 usbd_xfer_set_stall(xfer);
764 cdceem_m_crc32_cb(void *arg, void *src, uint32_t count)
766 uint32_t *p_crc = arg;
768 *p_crc = crc32_raw(src, count, *p_crc);
773 cdceem_m_crc32(struct mbuf *m, uint32_t src_offset, uint32_t src_len)
775 uint32_t crc = 0xFFFFFFFF;
778 error = m_apply(m, src_offset, src_len, cdceem_m_crc32_cb, &crc);
779 return (crc ^ 0xFFFFFFFF);
783 cdceem_start(struct usb_ether *ue)
785 struct cdceem_softc *sc;
787 sc = uether_getsc(ue);
790 * Start the USB transfers, if not already started.
792 usbd_transfer_start(sc->sc_xfer[CDCEEM_BULK_RX]);
793 usbd_transfer_start(sc->sc_xfer[CDCEEM_BULK_TX]);
797 cdceem_init(struct usb_ether *ue)
799 struct cdceem_softc *sc;
802 sc = uether_getsc(ue);
803 ifp = uether_getifp(ue);
805 ifp->if_drv_flags |= IFF_DRV_RUNNING;
807 if (cdceem_send_echoes)
808 sc->sc_flags = CDCEEM_SC_FLAGS_ECHO_PENDING;
813 * Stall data write direction, which depends on USB mode.
815 * Some USB host stacks (e.g. Mac OS X) don't clears stall
816 * bit as it should, so set it in our host mode only.
818 if (usbd_get_mode(sc->sc_ue.ue_udev) == USB_MODE_HOST)
819 usbd_xfer_set_stall(sc->sc_xfer[CDCEEM_BULK_TX]);
825 cdceem_stop(struct usb_ether *ue)
827 struct cdceem_softc *sc;
830 sc = uether_getsc(ue);
831 ifp = uether_getifp(ue);
833 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
835 usbd_transfer_stop(sc->sc_xfer[CDCEEM_BULK_RX]);
836 usbd_transfer_stop(sc->sc_xfer[CDCEEM_BULK_TX]);
840 cdceem_setmulti(struct usb_ether *ue)
847 cdceem_setpromisc(struct usb_ether *ue)
854 cdceem_suspend(device_t dev)
856 struct cdceem_softc *sc = device_get_softc(dev);
858 CDCEEM_DEBUG(sc, "go");
863 cdceem_resume(device_t dev)
865 struct cdceem_softc *sc = device_get_softc(dev);
867 CDCEEM_DEBUG(sc, "go");