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/drivers/net/usb/rndis_host.c

http://github.com/mirrors/linux
C | 646 lines | 465 code | 67 blank | 114 comment | 64 complexity | f834256de39b8a53c77d0ca548a7a9c3 MD5 | raw file
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Host Side support for RNDIS Networking Links
  4 * Copyright (C) 2005 by David Brownell
  5 */
  6#include <linux/module.h>
  7#include <linux/netdevice.h>
  8#include <linux/etherdevice.h>
  9#include <linux/ethtool.h>
 10#include <linux/workqueue.h>
 11#include <linux/slab.h>
 12#include <linux/mii.h>
 13#include <linux/usb.h>
 14#include <linux/usb/cdc.h>
 15#include <linux/usb/usbnet.h>
 16#include <linux/usb/rndis_host.h>
 17
 18
 19/*
 20 * RNDIS is NDIS remoted over USB.  It's a MSFT variant of CDC ACM ... of
 21 * course ACM was intended for modems, not Ethernet links!  USB's standard
 22 * for Ethernet links is "CDC Ethernet", which is significantly simpler.
 23 *
 24 * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete.  Issues
 25 * include:
 26 *    - Power management in particular relies on information that's scattered
 27 *	through other documentation, and which is incomplete or incorrect even
 28 *	there.
 29 *    - There are various undocumented protocol requirements, such as the
 30 *	need to send unused garbage in control-OUT messages.
 31 *    - In some cases, MS-Windows will emit undocumented requests; this
 32 *	matters more to peripheral implementations than host ones.
 33 *
 34 * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync".
 35 *
 36 * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in
 37 * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and
 38 * currently rare) "Ethernet Emulation Model" (EEM).
 39 */
 40
 41/*
 42 * RNDIS notifications from device: command completion; "reverse"
 43 * keepalives; etc
 44 */
 45void rndis_status(struct usbnet *dev, struct urb *urb)
 46{
 47	netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n",
 48		   urb->actual_length, urb->status);
 49	// FIXME for keepalives, respond immediately (asynchronously)
 50	// if not an RNDIS status, do like cdc_status(dev,urb) does
 51}
 52EXPORT_SYMBOL_GPL(rndis_status);
 53
 54/*
 55 * RNDIS indicate messages.
 56 */
 57static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg,
 58				int buflen)
 59{
 60	struct cdc_state *info = (void *)&dev->data;
 61	struct device *udev = &info->control->dev;
 62
 63	if (dev->driver_info->indication) {
 64		dev->driver_info->indication(dev, msg, buflen);
 65	} else {
 66		u32 status = le32_to_cpu(msg->status);
 67
 68		switch (status) {
 69		case RNDIS_STATUS_MEDIA_CONNECT:
 70			dev_info(udev, "rndis media connect\n");
 71			break;
 72		case RNDIS_STATUS_MEDIA_DISCONNECT:
 73			dev_info(udev, "rndis media disconnect\n");
 74			break;
 75		default:
 76			dev_info(udev, "rndis indication: 0x%08x\n", status);
 77		}
 78	}
 79}
 80
 81/*
 82 * RPC done RNDIS-style.  Caller guarantees:
 83 * - message is properly byteswapped
 84 * - there's no other request pending
 85 * - buf can hold up to 1KB response (required by RNDIS spec)
 86 * On return, the first few entries are already byteswapped.
 87 *
 88 * Call context is likely probe(), before interface name is known,
 89 * which is why we won't try to use it in the diagnostics.
 90 */
 91int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen)
 92{
 93	struct cdc_state	*info = (void *) &dev->data;
 94	struct usb_cdc_notification notification;
 95	int			master_ifnum;
 96	int			retval;
 97	int			partial;
 98	unsigned		count;
 99	u32			xid = 0, msg_len, request_id, msg_type, rsp,
100				status;
101
102	/* REVISIT when this gets called from contexts other than probe() or
103	 * disconnect(): either serialize, or dispatch responses on xid
104	 */
105
106	msg_type = le32_to_cpu(buf->msg_type);
107
108	/* Issue the request; xid is unique, don't bother byteswapping it */
109	if (likely(msg_type != RNDIS_MSG_HALT && msg_type != RNDIS_MSG_RESET)) {
110		xid = dev->xid++;
111		if (!xid)
112			xid = dev->xid++;
113		buf->request_id = (__force __le32) xid;
114	}
115	master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber;
116	retval = usb_control_msg(dev->udev,
117		usb_sndctrlpipe(dev->udev, 0),
118		USB_CDC_SEND_ENCAPSULATED_COMMAND,
119		USB_TYPE_CLASS | USB_RECIP_INTERFACE,
120		0, master_ifnum,
121		buf, le32_to_cpu(buf->msg_len),
122		RNDIS_CONTROL_TIMEOUT_MS);
123	if (unlikely(retval < 0 || xid == 0))
124		return retval;
125
126	/* Some devices don't respond on the control channel until
127	 * polled on the status channel, so do that first. */
128	if (dev->driver_info->data & RNDIS_DRIVER_DATA_POLL_STATUS) {
129		retval = usb_interrupt_msg(
130			dev->udev,
131			usb_rcvintpipe(dev->udev,
132				       dev->status->desc.bEndpointAddress),
133			&notification, sizeof(notification), &partial,
134			RNDIS_CONTROL_TIMEOUT_MS);
135		if (unlikely(retval < 0))
136			return retval;
137	}
138
139	/* Poll the control channel; the request probably completed immediately */
140	rsp = le32_to_cpu(buf->msg_type) | RNDIS_MSG_COMPLETION;
141	for (count = 0; count < 10; count++) {
142		memset(buf, 0, CONTROL_BUFFER_SIZE);
143		retval = usb_control_msg(dev->udev,
144			usb_rcvctrlpipe(dev->udev, 0),
145			USB_CDC_GET_ENCAPSULATED_RESPONSE,
146			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
147			0, master_ifnum,
148			buf, buflen,
149			RNDIS_CONTROL_TIMEOUT_MS);
150		if (likely(retval >= 8)) {
151			msg_type = le32_to_cpu(buf->msg_type);
152			msg_len = le32_to_cpu(buf->msg_len);
153			status = le32_to_cpu(buf->status);
154			request_id = (__force u32) buf->request_id;
155			if (likely(msg_type == rsp)) {
156				if (likely(request_id == xid)) {
157					if (unlikely(rsp == RNDIS_MSG_RESET_C))
158						return 0;
159					if (likely(RNDIS_STATUS_SUCCESS ==
160							status))
161						return 0;
162					dev_dbg(&info->control->dev,
163						"rndis reply status %08x\n",
164						status);
165					return -EL3RST;
166				}
167				dev_dbg(&info->control->dev,
168					"rndis reply id %d expected %d\n",
169					request_id, xid);
170				/* then likely retry */
171			} else switch (msg_type) {
172			case RNDIS_MSG_INDICATE: /* fault/event */
173				rndis_msg_indicate(dev, (void *)buf, buflen);
174				break;
175			case RNDIS_MSG_KEEPALIVE: { /* ping */
176				struct rndis_keepalive_c *msg = (void *)buf;
177
178				msg->msg_type = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
179				msg->msg_len = cpu_to_le32(sizeof *msg);
180				msg->status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
181				retval = usb_control_msg(dev->udev,
182					usb_sndctrlpipe(dev->udev, 0),
183					USB_CDC_SEND_ENCAPSULATED_COMMAND,
184					USB_TYPE_CLASS | USB_RECIP_INTERFACE,
185					0, master_ifnum,
186					msg, sizeof *msg,
187					RNDIS_CONTROL_TIMEOUT_MS);
188				if (unlikely(retval < 0))
189					dev_dbg(&info->control->dev,
190						"rndis keepalive err %d\n",
191						retval);
192				}
193				break;
194			default:
195				dev_dbg(&info->control->dev,
196					"unexpected rndis msg %08x len %d\n",
197					le32_to_cpu(buf->msg_type), msg_len);
198			}
199		} else {
200			/* device probably issued a protocol stall; ignore */
201			dev_dbg(&info->control->dev,
202				"rndis response error, code %d\n", retval);
203		}
204		msleep(20);
205	}
206	dev_dbg(&info->control->dev, "rndis response timeout\n");
207	return -ETIMEDOUT;
208}
209EXPORT_SYMBOL_GPL(rndis_command);
210
211/*
212 * rndis_query:
213 *
214 * Performs a query for @oid along with 0 or more bytes of payload as
215 * specified by @in_len. If @reply_len is not set to -1 then the reply
216 * length is checked against this value, resulting in an error if it
217 * doesn't match.
218 *
219 * NOTE: Adding a payload exactly or greater than the size of the expected
220 * response payload is an evident requirement MSFT added for ActiveSync.
221 *
222 * The only exception is for OIDs that return a variably sized response,
223 * in which case no payload should be added.  This undocumented (and
224 * nonsensical!) issue was found by sniffing protocol requests from the
225 * ActiveSync 4.1 Windows driver.
226 */
227static int rndis_query(struct usbnet *dev, struct usb_interface *intf,
228		void *buf, u32 oid, u32 in_len,
229		void **reply, int *reply_len)
230{
231	int retval;
232	union {
233		void			*buf;
234		struct rndis_msg_hdr	*header;
235		struct rndis_query	*get;
236		struct rndis_query_c	*get_c;
237	} u;
238	u32 off, len;
239
240	u.buf = buf;
241
242	memset(u.get, 0, sizeof *u.get + in_len);
243	u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY);
244	u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len);
245	u.get->oid = cpu_to_le32(oid);
246	u.get->len = cpu_to_le32(in_len);
247	u.get->offset = cpu_to_le32(20);
248
249	retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
250	if (unlikely(retval < 0)) {
251		dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n",
252				oid, retval);
253		return retval;
254	}
255
256	off = le32_to_cpu(u.get_c->offset);
257	len = le32_to_cpu(u.get_c->len);
258	if (unlikely((8 + off + len) > CONTROL_BUFFER_SIZE))
259		goto response_error;
260
261	if (*reply_len != -1 && len != *reply_len)
262		goto response_error;
263
264	*reply = (unsigned char *) &u.get_c->request_id + off;
265	*reply_len = len;
266
267	return retval;
268
269response_error:
270	dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) "
271			"invalid response - off %d len %d\n",
272		oid, off, len);
273	return -EDOM;
274}
275
276/* same as usbnet_netdev_ops but MTU change not allowed */
277static const struct net_device_ops rndis_netdev_ops = {
278	.ndo_open		= usbnet_open,
279	.ndo_stop		= usbnet_stop,
280	.ndo_start_xmit		= usbnet_start_xmit,
281	.ndo_tx_timeout		= usbnet_tx_timeout,
282	.ndo_get_stats64	= usbnet_get_stats64,
283	.ndo_set_mac_address 	= eth_mac_addr,
284	.ndo_validate_addr	= eth_validate_addr,
285};
286
287int
288generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
289{
290	int			retval;
291	struct net_device	*net = dev->net;
292	struct cdc_state	*info = (void *) &dev->data;
293	union {
294		void			*buf;
295		struct rndis_msg_hdr	*header;
296		struct rndis_init	*init;
297		struct rndis_init_c	*init_c;
298		struct rndis_query	*get;
299		struct rndis_query_c	*get_c;
300		struct rndis_set	*set;
301		struct rndis_set_c	*set_c;
302		struct rndis_halt	*halt;
303	} u;
304	u32			tmp;
305	__le32			phym_unspec, *phym;
306	int			reply_len;
307	unsigned char		*bp;
308
309	/* we can't rely on i/o from stack working, or stack allocation */
310	u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
311	if (!u.buf)
312		return -ENOMEM;
313	retval = usbnet_generic_cdc_bind(dev, intf);
314	if (retval < 0)
315		goto fail;
316
317	u.init->msg_type = cpu_to_le32(RNDIS_MSG_INIT);
318	u.init->msg_len = cpu_to_le32(sizeof *u.init);
319	u.init->major_version = cpu_to_le32(1);
320	u.init->minor_version = cpu_to_le32(0);
321
322	/* max transfer (in spec) is 0x4000 at full speed, but for
323	 * TX we'll stick to one Ethernet packet plus RNDIS framing.
324	 * For RX we handle drivers that zero-pad to end-of-packet.
325	 * Don't let userspace change these settings.
326	 *
327	 * NOTE: there still seems to be wierdness here, as if we need
328	 * to do some more things to make sure WinCE targets accept this.
329	 * They default to jumbograms of 8KB or 16KB, which is absurd
330	 * for such low data rates and which is also more than Linux
331	 * can usually expect to allocate for SKB data...
332	 */
333	net->hard_header_len += sizeof (struct rndis_data_hdr);
334	dev->hard_mtu = net->mtu + net->hard_header_len;
335
336	dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
337	if (dev->maxpacket == 0) {
338		netif_dbg(dev, probe, dev->net,
339			  "dev->maxpacket can't be 0\n");
340		retval = -EINVAL;
341		goto fail_and_release;
342	}
343
344	dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1);
345	dev->rx_urb_size &= ~(dev->maxpacket - 1);
346	u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size);
347
348	net->netdev_ops = &rndis_netdev_ops;
349
350	retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
351	if (unlikely(retval < 0)) {
352		/* it might not even be an RNDIS device!! */
353		dev_err(&intf->dev, "RNDIS init failed, %d\n", retval);
354		goto fail_and_release;
355	}
356	tmp = le32_to_cpu(u.init_c->max_transfer_size);
357	if (tmp < dev->hard_mtu) {
358		if (tmp <= net->hard_header_len) {
359			dev_err(&intf->dev,
360				"dev can't take %u byte packets (max %u)\n",
361				dev->hard_mtu, tmp);
362			retval = -EINVAL;
363			goto halt_fail_and_release;
364		}
365		dev_warn(&intf->dev,
366			 "dev can't take %u byte packets (max %u), "
367			 "adjusting MTU to %u\n",
368			 dev->hard_mtu, tmp, tmp - net->hard_header_len);
369		dev->hard_mtu = tmp;
370		net->mtu = dev->hard_mtu - net->hard_header_len;
371	}
372
373	/* REVISIT:  peripheral "alignment" request is ignored ... */
374	dev_dbg(&intf->dev,
375		"hard mtu %u (%u from dev), rx buflen %zu, align %d\n",
376		dev->hard_mtu, tmp, dev->rx_urb_size,
377		1 << le32_to_cpu(u.init_c->packet_alignment));
378
379	/* module has some device initialization code needs to be done right
380	 * after RNDIS_INIT */
381	if (dev->driver_info->early_init &&
382			dev->driver_info->early_init(dev) != 0)
383		goto halt_fail_and_release;
384
385	/* Check physical medium */
386	phym = NULL;
387	reply_len = sizeof *phym;
388	retval = rndis_query(dev, intf, u.buf,
389			     RNDIS_OID_GEN_PHYSICAL_MEDIUM,
390			     0, (void **) &phym, &reply_len);
391	if (retval != 0 || !phym) {
392		/* OID is optional so don't fail here. */
393		phym_unspec = cpu_to_le32(RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED);
394		phym = &phym_unspec;
395	}
396	if ((flags & FLAG_RNDIS_PHYM_WIRELESS) &&
397	    le32_to_cpup(phym) != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
398		netif_dbg(dev, probe, dev->net,
399			  "driver requires wireless physical medium, but device is not\n");
400		retval = -ENODEV;
401		goto halt_fail_and_release;
402	}
403	if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) &&
404	    le32_to_cpup(phym) == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
405		netif_dbg(dev, probe, dev->net,
406			  "driver requires non-wireless physical medium, but device is wireless.\n");
407		retval = -ENODEV;
408		goto halt_fail_and_release;
409	}
410
411	/* Get designated host ethernet address */
412	reply_len = ETH_ALEN;
413	retval = rndis_query(dev, intf, u.buf,
414			     RNDIS_OID_802_3_PERMANENT_ADDRESS,
415			     48, (void **) &bp, &reply_len);
416	if (unlikely(retval< 0)) {
417		dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
418		goto halt_fail_and_release;
419	}
420
421	if (bp[0] & 0x02)
422		eth_hw_addr_random(net);
423	else
424		ether_addr_copy(net->dev_addr, bp);
425
426	/* set a nonzero filter to enable data transfers */
427	memset(u.set, 0, sizeof *u.set);
428	u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET);
429	u.set->msg_len = cpu_to_le32(4 + sizeof *u.set);
430	u.set->oid = cpu_to_le32(RNDIS_OID_GEN_CURRENT_PACKET_FILTER);
431	u.set->len = cpu_to_le32(4);
432	u.set->offset = cpu_to_le32((sizeof *u.set) - 8);
433	*(__le32 *)(u.buf + sizeof *u.set) = cpu_to_le32(RNDIS_DEFAULT_FILTER);
434
435	retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
436	if (unlikely(retval < 0)) {
437		dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
438		goto halt_fail_and_release;
439	}
440
441	retval = 0;
442
443	kfree(u.buf);
444	return retval;
445
446halt_fail_and_release:
447	memset(u.halt, 0, sizeof *u.halt);
448	u.halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT);
449	u.halt->msg_len = cpu_to_le32(sizeof *u.halt);
450	(void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE);
451fail_and_release:
452	usb_set_intfdata(info->data, NULL);
453	usb_driver_release_interface(driver_of(intf), info->data);
454	info->data = NULL;
455fail:
456	kfree(u.buf);
457	return retval;
458}
459EXPORT_SYMBOL_GPL(generic_rndis_bind);
460
461static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
462{
463	return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS);
464}
465
466void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
467{
468	struct rndis_halt	*halt;
469
470	/* try to clear any rndis state/activity (no i/o from stack!) */
471	halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
472	if (halt) {
473		halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT);
474		halt->msg_len = cpu_to_le32(sizeof *halt);
475		(void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE);
476		kfree(halt);
477	}
478
479	usbnet_cdc_unbind(dev, intf);
480}
481EXPORT_SYMBOL_GPL(rndis_unbind);
482
483/*
484 * DATA -- host must not write zlps
485 */
486int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
487{
488	/* This check is no longer done by usbnet */
489	if (skb->len < dev->net->hard_header_len)
490		return 0;
491
492	/* peripheral may have batched packets to us... */
493	while (likely(skb->len)) {
494		struct rndis_data_hdr	*hdr = (void *)skb->data;
495		struct sk_buff		*skb2;
496		u32			msg_type, msg_len, data_offset, data_len;
497
498		msg_type = le32_to_cpu(hdr->msg_type);
499		msg_len = le32_to_cpu(hdr->msg_len);
500		data_offset = le32_to_cpu(hdr->data_offset);
501		data_len = le32_to_cpu(hdr->data_len);
502
503		/* don't choke if we see oob, per-packet data, etc */
504		if (unlikely(msg_type != RNDIS_MSG_PACKET || skb->len < msg_len
505				|| (data_offset + data_len + 8) > msg_len)) {
506			dev->net->stats.rx_frame_errors++;
507			netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n",
508				   le32_to_cpu(hdr->msg_type),
509				   msg_len, data_offset, data_len, skb->len);
510			return 0;
511		}
512		skb_pull(skb, 8 + data_offset);
513
514		/* at most one packet left? */
515		if (likely((data_len - skb->len) <= sizeof *hdr)) {
516			skb_trim(skb, data_len);
517			break;
518		}
519
520		/* try to return all the packets in the batch */
521		skb2 = skb_clone(skb, GFP_ATOMIC);
522		if (unlikely(!skb2))
523			break;
524		skb_pull(skb, msg_len - sizeof *hdr);
525		skb_trim(skb2, data_len);
526		usbnet_skb_return(dev, skb2);
527	}
528
529	/* caller will usbnet_skb_return the remaining packet */
530	return 1;
531}
532EXPORT_SYMBOL_GPL(rndis_rx_fixup);
533
534struct sk_buff *
535rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
536{
537	struct rndis_data_hdr	*hdr;
538	struct sk_buff		*skb2;
539	unsigned		len = skb->len;
540
541	if (likely(!skb_cloned(skb))) {
542		int	room = skb_headroom(skb);
543
544		/* enough head room as-is? */
545		if (unlikely((sizeof *hdr) <= room))
546			goto fill;
547
548		/* enough room, but needs to be readjusted? */
549		room += skb_tailroom(skb);
550		if (likely((sizeof *hdr) <= room)) {
551			skb->data = memmove(skb->head + sizeof *hdr,
552					    skb->data, len);
553			skb_set_tail_pointer(skb, len);
554			goto fill;
555		}
556	}
557
558	/* create a new skb, with the correct size (and tailpad) */
559	skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags);
560	dev_kfree_skb_any(skb);
561	if (unlikely(!skb2))
562		return skb2;
563	skb = skb2;
564
565	/* fill out the RNDIS header.  we won't bother trying to batch
566	 * packets; Linux minimizes wasted bandwidth through tx queues.
567	 */
568fill:
569	hdr = __skb_push(skb, sizeof *hdr);
570	memset(hdr, 0, sizeof *hdr);
571	hdr->msg_type = cpu_to_le32(RNDIS_MSG_PACKET);
572	hdr->msg_len = cpu_to_le32(skb->len);
573	hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8);
574	hdr->data_len = cpu_to_le32(len);
575
576	/* FIXME make the last packet always be short ... */
577	return skb;
578}
579EXPORT_SYMBOL_GPL(rndis_tx_fixup);
580
581
582static const struct driver_info	rndis_info = {
583	.description =	"RNDIS device",
584	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
585	.bind =		rndis_bind,
586	.unbind =	rndis_unbind,
587	.status =	rndis_status,
588	.rx_fixup =	rndis_rx_fixup,
589	.tx_fixup =	rndis_tx_fixup,
590};
591
592static const struct driver_info	rndis_poll_status_info = {
593	.description =	"RNDIS device (poll status before control)",
594	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
595	.data =		RNDIS_DRIVER_DATA_POLL_STATUS,
596	.bind =		rndis_bind,
597	.unbind =	rndis_unbind,
598	.status =	rndis_status,
599	.rx_fixup =	rndis_rx_fixup,
600	.tx_fixup =	rndis_tx_fixup,
601};
602
603/*-------------------------------------------------------------------------*/
604
605static const struct usb_device_id	products [] = {
606{
607	/* 2Wire HomePortal 1000SW */
608	USB_DEVICE_AND_INTERFACE_INFO(0x1630, 0x0042,
609				      USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
610	.driver_info = (unsigned long) &rndis_poll_status_info,
611}, {
612	/* RNDIS is MSFT's un-official variant of CDC ACM */
613	USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
614	.driver_info = (unsigned long) &rndis_info,
615}, {
616	/* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */
617	USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1),
618	.driver_info = (unsigned long) &rndis_poll_status_info,
619}, {
620	/* RNDIS for tethering */
621	USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3),
622	.driver_info = (unsigned long) &rndis_info,
623}, {
624	/* Novatel Verizon USB730L */
625	USB_INTERFACE_INFO(USB_CLASS_MISC, 4, 1),
626	.driver_info = (unsigned long) &rndis_info,
627},
628	{ },		// END
629};
630MODULE_DEVICE_TABLE(usb, products);
631
632static struct usb_driver rndis_driver = {
633	.name =		"rndis_host",
634	.id_table =	products,
635	.probe =	usbnet_probe,
636	.disconnect =	usbnet_disconnect,
637	.suspend =	usbnet_suspend,
638	.resume =	usbnet_resume,
639	.disable_hub_initiated_lpm = 1,
640};
641
642module_usb_driver(rndis_driver);
643
644MODULE_AUTHOR("David Brownell");
645MODULE_DESCRIPTION("USB Host side RNDIS driver");
646MODULE_LICENSE("GPL");