1/*
2 * Host Side support for RNDIS Networking Links
3 * Copyright (C) 2005 by David Brownell
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18#include <linux/module.h>
19#include <linux/netdevice.h>
20#include <linux/etherdevice.h>
21#include <linux/ethtool.h>
22#include <linux/workqueue.h>
23#include <linux/slab.h>
24#include <linux/mii.h>
25#include <linux/usb.h>
26#include <linux/usb/cdc.h>
27#include <linux/usb/usbnet.h>
28#include <linux/usb/rndis_host.h>
29
30
31/*
32 * RNDIS is NDIS remoted over USB.  It's a MSFT variant of CDC ACM ... of
33 * course ACM was intended for modems, not Ethernet links!  USB's standard
34 * for Ethernet links is "CDC Ethernet", which is significantly simpler.
35 *
36 * NOTE that Microsoft's "RNDIS 1.0" specification is incomplete.  Issues
37 * include:
38 *    - Power management in particular relies on information that's scattered
39 *	through other documentation, and which is incomplete or incorrect even
40 *	there.
41 *    - There are various undocumented protocol requirements, such as the
42 *	need to send unused garbage in control-OUT messages.
43 *    - In some cases, MS-Windows will emit undocumented requests; this
44 *	matters more to peripheral implementations than host ones.
45 *
46 * Moreover there's a no-open-specs variant of RNDIS called "ActiveSync".
47 *
48 * For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in
49 * favor of such non-proprietary alternatives as CDC Ethernet or the newer (and
50 * currently rare) "Ethernet Emulation Model" (EEM).
51 */
52
53/*
54 * RNDIS notifications from device: command completion; "reverse"
55 * keepalives; etc
56 */
57void rndis_status(struct usbnet *dev, struct urb *urb)
58{
59	netdev_dbg(dev->net, "rndis status urb, len %d stat %d\n",
60		   urb->actual_length, urb->status);
61	// FIXME for keepalives, respond immediately (asynchronously)
62	// if not an RNDIS status, do like cdc_status(dev,urb) does
63}
64EXPORT_SYMBOL_GPL(rndis_status);
65
66/*
67 * RNDIS indicate messages.
68 */
69static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg,
70				int buflen)
71{
72	struct cdc_state *info = (void *)&dev->data;
73	struct device *udev = &info->control->dev;
74
75	if (dev->driver_info->indication) {
76		dev->driver_info->indication(dev, msg, buflen);
77	} else {
78		u32 status = le32_to_cpu(msg->status);
79
80		switch (status) {
81		case RNDIS_STATUS_MEDIA_CONNECT:
82			dev_info(udev, "rndis media connect\n");
83			break;
84		case RNDIS_STATUS_MEDIA_DISCONNECT:
85			dev_info(udev, "rndis media disconnect\n");
86			break;
87		default:
88			dev_info(udev, "rndis indication: 0x%08x\n", status);
89		}
90	}
91}
92
93/*
94 * RPC done RNDIS-style.  Caller guarantees:
95 * - message is properly byteswapped
96 * - there's no other request pending
97 * - buf can hold up to 1KB response (required by RNDIS spec)
98 * On return, the first few entries are already byteswapped.
99 *
100 * Call context is likely probe(), before interface name is known,
101 * which is why we won't try to use it in the diagnostics.
102 */
103int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen)
104{
105	struct cdc_state	*info = (void *) &dev->data;
106	struct usb_cdc_notification notification;
107	int			master_ifnum;
108	int			retval;
109	int			partial;
110	unsigned		count;
111	u32			xid = 0, msg_len, request_id, msg_type, rsp,
112				status;
113
114	/* REVISIT when this gets called from contexts other than probe() or
115	 * disconnect(): either serialize, or dispatch responses on xid
116	 */
117
118	msg_type = le32_to_cpu(buf->msg_type);
119
120	/* Issue the request; xid is unique, don't bother byteswapping it */
121	if (likely(msg_type != RNDIS_MSG_HALT && msg_type != RNDIS_MSG_RESET)) {
122		xid = dev->xid++;
123		if (!xid)
124			xid = dev->xid++;
125		buf->request_id = (__force __le32) xid;
126	}
127	master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber;
128	retval = usb_control_msg(dev->udev,
129		usb_sndctrlpipe(dev->udev, 0),
130		USB_CDC_SEND_ENCAPSULATED_COMMAND,
131		USB_TYPE_CLASS | USB_RECIP_INTERFACE,
132		0, master_ifnum,
133		buf, le32_to_cpu(buf->msg_len),
134		RNDIS_CONTROL_TIMEOUT_MS);
135	if (unlikely(retval < 0 || xid == 0))
136		return retval;
137
138	/* Some devices don't respond on the control channel until
139	 * polled on the status channel, so do that first. */
140	if (dev->driver_info->data & RNDIS_DRIVER_DATA_POLL_STATUS) {
141		retval = usb_interrupt_msg(
142			dev->udev,
143			usb_rcvintpipe(dev->udev,
144				       dev->status->desc.bEndpointAddress),
145			&notification, sizeof(notification), &partial,
146			RNDIS_CONTROL_TIMEOUT_MS);
147		if (unlikely(retval < 0))
148			return retval;
149	}
150
151	/* Poll the control channel; the request probably completed immediately */
152	rsp = le32_to_cpu(buf->msg_type) | RNDIS_MSG_COMPLETION;
153	for (count = 0; count < 10; count++) {
154		memset(buf, 0, CONTROL_BUFFER_SIZE);
155		retval = usb_control_msg(dev->udev,
156			usb_rcvctrlpipe(dev->udev, 0),
157			USB_CDC_GET_ENCAPSULATED_RESPONSE,
158			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
159			0, master_ifnum,
160			buf, buflen,
161			RNDIS_CONTROL_TIMEOUT_MS);
162		if (likely(retval >= 8)) {
163			msg_type = le32_to_cpu(buf->msg_type);
164			msg_len = le32_to_cpu(buf->msg_len);
165			status = le32_to_cpu(buf->status);
166			request_id = (__force u32) buf->request_id;
167			if (likely(msg_type == rsp)) {
168				if (likely(request_id == xid)) {
169					if (unlikely(rsp == RNDIS_MSG_RESET_C))
170						return 0;
171					if (likely(RNDIS_STATUS_SUCCESS ==
172							status))
173						return 0;
174					dev_dbg(&info->control->dev,
175						"rndis reply status %08x\n",
176						status);
177					return -EL3RST;
178				}
179				dev_dbg(&info->control->dev,
180					"rndis reply id %d expected %d\n",
181					request_id, xid);
182				/* then likely retry */
183			} else switch (msg_type) {
184			case RNDIS_MSG_INDICATE: /* fault/event */
185				rndis_msg_indicate(dev, (void *)buf, buflen);
186				break;
187			case RNDIS_MSG_KEEPALIVE: { /* ping */
188				struct rndis_keepalive_c *msg = (void *)buf;
189
190				msg->msg_type = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
191				msg->msg_len = cpu_to_le32(sizeof *msg);
192				msg->status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
193				retval = usb_control_msg(dev->udev,
194					usb_sndctrlpipe(dev->udev, 0),
195					USB_CDC_SEND_ENCAPSULATED_COMMAND,
196					USB_TYPE_CLASS | USB_RECIP_INTERFACE,
197					0, master_ifnum,
198					msg, sizeof *msg,
199					RNDIS_CONTROL_TIMEOUT_MS);
200				if (unlikely(retval < 0))
201					dev_dbg(&info->control->dev,
202						"rndis keepalive err %d\n",
203						retval);
204				}
205				break;
206			default:
207				dev_dbg(&info->control->dev,
208					"unexpected rndis msg %08x len %d\n",
209					le32_to_cpu(buf->msg_type), msg_len);
210			}
211		} else {
212			/* device probably issued a protocol stall; ignore */
213			dev_dbg(&info->control->dev,
214				"rndis response error, code %d\n", retval);
215		}
216		msleep(20);
217	}
218	dev_dbg(&info->control->dev, "rndis response timeout\n");
219	return -ETIMEDOUT;
220}
221EXPORT_SYMBOL_GPL(rndis_command);
222
223/*
224 * rndis_query:
225 *
226 * Performs a query for @oid along with 0 or more bytes of payload as
227 * specified by @in_len. If @reply_len is not set to -1 then the reply
228 * length is checked against this value, resulting in an error if it
229 * doesn't match.
230 *
231 * NOTE: Adding a payload exactly or greater than the size of the expected
232 * response payload is an evident requirement MSFT added for ActiveSync.
233 *
234 * The only exception is for OIDs that return a variably sized response,
235 * in which case no payload should be added.  This undocumented (and
236 * nonsensical!) issue was found by sniffing protocol requests from the
237 * ActiveSync 4.1 Windows driver.
238 */
239static int rndis_query(struct usbnet *dev, struct usb_interface *intf,
240		void *buf, u32 oid, u32 in_len,
241		void **reply, int *reply_len)
242{
243	int retval;
244	union {
245		void			*buf;
246		struct rndis_msg_hdr	*header;
247		struct rndis_query	*get;
248		struct rndis_query_c	*get_c;
249	} u;
250	u32 off, len;
251
252	u.buf = buf;
253
254	memset(u.get, 0, sizeof *u.get + in_len);
255	u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY);
256	u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len);
257	u.get->oid = cpu_to_le32(oid);
258	u.get->len = cpu_to_le32(in_len);
259	u.get->offset = cpu_to_le32(20);
260
261	retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
262	if (unlikely(retval < 0)) {
263		dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n",
264				oid, retval);
265		return retval;
266	}
267
268	off = le32_to_cpu(u.get_c->offset);
269	len = le32_to_cpu(u.get_c->len);
270	if (unlikely((8 + off + len) > CONTROL_BUFFER_SIZE))
271		goto response_error;
272
273	if (*reply_len != -1 && len != *reply_len)
274		goto response_error;
275
276	*reply = (unsigned char *) &u.get_c->request_id + off;
277	*reply_len = len;
278
279	return retval;
280
281response_error:
282	dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) "
283			"invalid response - off %d len %d\n",
284		oid, off, len);
285	return -EDOM;
286}
287
288/* same as usbnet_netdev_ops but MTU change not allowed */
289static const struct net_device_ops rndis_netdev_ops = {
290	.ndo_open		= usbnet_open,
291	.ndo_stop		= usbnet_stop,
292	.ndo_start_xmit		= usbnet_start_xmit,
293	.ndo_tx_timeout		= usbnet_tx_timeout,
294	.ndo_set_mac_address 	= eth_mac_addr,
295	.ndo_validate_addr	= eth_validate_addr,
296};
297
298int
299generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags)
300{
301	int			retval;
302	struct net_device	*net = dev->net;
303	struct cdc_state	*info = (void *) &dev->data;
304	union {
305		void			*buf;
306		struct rndis_msg_hdr	*header;
307		struct rndis_init	*init;
308		struct rndis_init_c	*init_c;
309		struct rndis_query	*get;
310		struct rndis_query_c	*get_c;
311		struct rndis_set	*set;
312		struct rndis_set_c	*set_c;
313		struct rndis_halt	*halt;
314	} u;
315	u32			tmp;
316	__le32			phym_unspec, *phym;
317	int			reply_len;
318	unsigned char		*bp;
319
320	/* we can't rely on i/o from stack working, or stack allocation */
321	u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
322	if (!u.buf)
323		return -ENOMEM;
324	retval = usbnet_generic_cdc_bind(dev, intf);
325	if (retval < 0)
326		goto fail;
327
328	u.init->msg_type = cpu_to_le32(RNDIS_MSG_INIT);
329	u.init->msg_len = cpu_to_le32(sizeof *u.init);
330	u.init->major_version = cpu_to_le32(1);
331	u.init->minor_version = cpu_to_le32(0);
332
333	/* max transfer (in spec) is 0x4000 at full speed, but for
334	 * TX we'll stick to one Ethernet packet plus RNDIS framing.
335	 * For RX we handle drivers that zero-pad to end-of-packet.
336	 * Don't let userspace change these settings.
337	 *
338	 * NOTE: there still seems to be wierdness here, as if we need
339	 * to do some more things to make sure WinCE targets accept this.
340	 * They default to jumbograms of 8KB or 16KB, which is absurd
341	 * for such low data rates and which is also more than Linux
342	 * can usually expect to allocate for SKB data...
343	 */
344	net->hard_header_len += sizeof (struct rndis_data_hdr);
345	dev->hard_mtu = net->mtu + net->hard_header_len;
346
347	dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
348	if (dev->maxpacket == 0) {
349		netif_dbg(dev, probe, dev->net,
350			  "dev->maxpacket can't be 0\n");
351		retval = -EINVAL;
352		goto fail_and_release;
353	}
354
355	dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1);
356	dev->rx_urb_size &= ~(dev->maxpacket - 1);
357	u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size);
358
359	net->netdev_ops = &rndis_netdev_ops;
360
361	retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
362	if (unlikely(retval < 0)) {
363		/* it might not even be an RNDIS device!! */
364		dev_err(&intf->dev, "RNDIS init failed, %d\n", retval);
365		goto fail_and_release;
366	}
367	tmp = le32_to_cpu(u.init_c->max_transfer_size);
368	if (tmp < dev->hard_mtu) {
369		if (tmp <= net->hard_header_len) {
370			dev_err(&intf->dev,
371				"dev can't take %u byte packets (max %u)\n",
372				dev->hard_mtu, tmp);
373			retval = -EINVAL;
374			goto halt_fail_and_release;
375		}
376		dev_warn(&intf->dev,
377			 "dev can't take %u byte packets (max %u), "
378			 "adjusting MTU to %u\n",
379			 dev->hard_mtu, tmp, tmp - net->hard_header_len);
380		dev->hard_mtu = tmp;
381		net->mtu = dev->hard_mtu - net->hard_header_len;
382	}
383
384	/* REVISIT:  peripheral "alignment" request is ignored ... */
385	dev_dbg(&intf->dev,
386		"hard mtu %u (%u from dev), rx buflen %Zu, align %d\n",
387		dev->hard_mtu, tmp, dev->rx_urb_size,
388		1 << le32_to_cpu(u.init_c->packet_alignment));
389
390	/* module has some device initialization code needs to be done right
391	 * after RNDIS_INIT */
392	if (dev->driver_info->early_init &&
393			dev->driver_info->early_init(dev) != 0)
394		goto halt_fail_and_release;
395
396	/* Check physical medium */
397	phym = NULL;
398	reply_len = sizeof *phym;
399	retval = rndis_query(dev, intf, u.buf,
400			     RNDIS_OID_GEN_PHYSICAL_MEDIUM,
401			     0, (void **) &phym, &reply_len);
402	if (retval != 0 || !phym) {
403		/* OID is optional so don't fail here. */
404		phym_unspec = cpu_to_le32(RNDIS_PHYSICAL_MEDIUM_UNSPECIFIED);
405		phym = &phym_unspec;
406	}
407	if ((flags & FLAG_RNDIS_PHYM_WIRELESS) &&
408	    le32_to_cpup(phym) != RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
409		netif_dbg(dev, probe, dev->net,
410			  "driver requires wireless physical medium, but device is not\n");
411		retval = -ENODEV;
412		goto halt_fail_and_release;
413	}
414	if ((flags & FLAG_RNDIS_PHYM_NOT_WIRELESS) &&
415	    le32_to_cpup(phym) == RNDIS_PHYSICAL_MEDIUM_WIRELESS_LAN) {
416		netif_dbg(dev, probe, dev->net,
417			  "driver requires non-wireless physical medium, but device is wireless.\n");
418		retval = -ENODEV;
419		goto halt_fail_and_release;
420	}
421
422	/* Get designated host ethernet address */
423	reply_len = ETH_ALEN;
424	retval = rndis_query(dev, intf, u.buf,
425			     RNDIS_OID_802_3_PERMANENT_ADDRESS,
426			     48, (void **) &bp, &reply_len);
427	if (unlikely(retval< 0)) {
428		dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
429		goto halt_fail_and_release;
430	}
431	memcpy(net->dev_addr, bp, ETH_ALEN);
432
433	/* set a nonzero filter to enable data transfers */
434	memset(u.set, 0, sizeof *u.set);
435	u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET);
436	u.set->msg_len = cpu_to_le32(4 + sizeof *u.set);
437	u.set->oid = cpu_to_le32(RNDIS_OID_GEN_CURRENT_PACKET_FILTER);
438	u.set->len = cpu_to_le32(4);
439	u.set->offset = cpu_to_le32((sizeof *u.set) - 8);
440	*(__le32 *)(u.buf + sizeof *u.set) = cpu_to_le32(RNDIS_DEFAULT_FILTER);
441
442	retval = rndis_command(dev, u.header, CONTROL_BUFFER_SIZE);
443	if (unlikely(retval < 0)) {
444		dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
445		goto halt_fail_and_release;
446	}
447
448	retval = 0;
449
450	kfree(u.buf);
451	return retval;
452
453halt_fail_and_release:
454	memset(u.halt, 0, sizeof *u.halt);
455	u.halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT);
456	u.halt->msg_len = cpu_to_le32(sizeof *u.halt);
457	(void) rndis_command(dev, (void *)u.halt, CONTROL_BUFFER_SIZE);
458fail_and_release:
459	usb_set_intfdata(info->data, NULL);
460	usb_driver_release_interface(driver_of(intf), info->data);
461	info->data = NULL;
462fail:
463	kfree(u.buf);
464	return retval;
465}
466EXPORT_SYMBOL_GPL(generic_rndis_bind);
467
468static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
469{
470	return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS);
471}
472
473void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
474{
475	struct rndis_halt	*halt;
476
477	/* try to clear any rndis state/activity (no i/o from stack!) */
478	halt = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
479	if (halt) {
480		halt->msg_type = cpu_to_le32(RNDIS_MSG_HALT);
481		halt->msg_len = cpu_to_le32(sizeof *halt);
482		(void) rndis_command(dev, (void *)halt, CONTROL_BUFFER_SIZE);
483		kfree(halt);
484	}
485
486	usbnet_cdc_unbind(dev, intf);
487}
488EXPORT_SYMBOL_GPL(rndis_unbind);
489
490/*
491 * DATA -- host must not write zlps
492 */
493int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
494{
495	/* This check is no longer done by usbnet */
496	if (skb->len < dev->net->hard_header_len)
497		return 0;
498
499	/* peripheral may have batched packets to us... */
500	while (likely(skb->len)) {
501		struct rndis_data_hdr	*hdr = (void *)skb->data;
502		struct sk_buff		*skb2;
503		u32			msg_type, msg_len, data_offset, data_len;
504
505		msg_type = le32_to_cpu(hdr->msg_type);
506		msg_len = le32_to_cpu(hdr->msg_len);
507		data_offset = le32_to_cpu(hdr->data_offset);
508		data_len = le32_to_cpu(hdr->data_len);
509
510		/* don't choke if we see oob, per-packet data, etc */
511		if (unlikely(msg_type != RNDIS_MSG_PACKET || skb->len < msg_len
512				|| (data_offset + data_len + 8) > msg_len)) {
513			dev->net->stats.rx_frame_errors++;
514			netdev_dbg(dev->net, "bad rndis message %d/%d/%d/%d, len %d\n",
515				   le32_to_cpu(hdr->msg_type),
516				   msg_len, data_offset, data_len, skb->len);
517			return 0;
518		}
519		skb_pull(skb, 8 + data_offset);
520
521		/* at most one packet left? */
522		if (likely((data_len - skb->len) <= sizeof *hdr)) {
523			skb_trim(skb, data_len);
524			break;
525		}
526
527		/* try to return all the packets in the batch */
528		skb2 = skb_clone(skb, GFP_ATOMIC);
529		if (unlikely(!skb2))
530			break;
531		skb_pull(skb, msg_len - sizeof *hdr);
532		skb_trim(skb2, data_len);
533		usbnet_skb_return(dev, skb2);
534	}
535
536	/* caller will usbnet_skb_return the remaining packet */
537	return 1;
538}
539EXPORT_SYMBOL_GPL(rndis_rx_fixup);
540
541struct sk_buff *
542rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
543{
544	struct rndis_data_hdr	*hdr;
545	struct sk_buff		*skb2;
546	unsigned		len = skb->len;
547
548	if (likely(!skb_cloned(skb))) {
549		int	room = skb_headroom(skb);
550
551		/* enough head room as-is? */
552		if (unlikely((sizeof *hdr) <= room))
553			goto fill;
554
555		/* enough room, but needs to be readjusted? */
556		room += skb_tailroom(skb);
557		if (likely((sizeof *hdr) <= room)) {
558			skb->data = memmove(skb->head + sizeof *hdr,
559					    skb->data, len);
560			skb_set_tail_pointer(skb, len);
561			goto fill;
562		}
563	}
564
565	/* create a new skb, with the correct size (and tailpad) */
566	skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags);
567	dev_kfree_skb_any(skb);
568	if (unlikely(!skb2))
569		return skb2;
570	skb = skb2;
571
572	/* fill out the RNDIS header.  we won't bother trying to batch
573	 * packets; Linux minimizes wasted bandwidth through tx queues.
574	 */
575fill:
576	hdr = (void *) __skb_push(skb, sizeof *hdr);
577	memset(hdr, 0, sizeof *hdr);
578	hdr->msg_type = cpu_to_le32(RNDIS_MSG_PACKET);
579	hdr->msg_len = cpu_to_le32(skb->len);
580	hdr->data_offset = cpu_to_le32(sizeof(*hdr) - 8);
581	hdr->data_len = cpu_to_le32(len);
582
583	/* FIXME make the last packet always be short ... */
584	return skb;
585}
586EXPORT_SYMBOL_GPL(rndis_tx_fixup);
587
588
589static const struct driver_info	rndis_info = {
590	.description =	"RNDIS device",
591	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
592	.bind =		rndis_bind,
593	.unbind =	rndis_unbind,
594	.status =	rndis_status,
595	.rx_fixup =	rndis_rx_fixup,
596	.tx_fixup =	rndis_tx_fixup,
597};
598
599static const struct driver_info	rndis_poll_status_info = {
600	.description =	"RNDIS device (poll status before control)",
601	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
602	.data =		RNDIS_DRIVER_DATA_POLL_STATUS,
603	.bind =		rndis_bind,
604	.unbind =	rndis_unbind,
605	.status =	rndis_status,
606	.rx_fixup =	rndis_rx_fixup,
607	.tx_fixup =	rndis_tx_fixup,
608};
609
610/*-------------------------------------------------------------------------*/
611
612static const struct usb_device_id	products [] = {
613{
614	/* 2Wire HomePortal 1000SW */
615	USB_DEVICE_AND_INTERFACE_INFO(0x1630, 0x0042,
616				      USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
617	.driver_info = (unsigned long) &rndis_poll_status_info,
618}, {
619	/* RNDIS is MSFT's un-official variant of CDC ACM */
620	USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
621	.driver_info = (unsigned long) &rndis_info,
622}, {
623	/* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */
624	USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1),
625	.driver_info = (unsigned long) &rndis_poll_status_info,
626}, {
627	/* RNDIS for tethering */
628	USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3),
629	.driver_info = (unsigned long) &rndis_info,
630},
631	{ },		// END
632};
633MODULE_DEVICE_TABLE(usb, products);
634
635static struct usb_driver rndis_driver = {
636	.name =		"rndis_host",
637	.id_table =	products,
638	.probe =	usbnet_probe,
639	.disconnect =	usbnet_disconnect,
640	.suspend =	usbnet_suspend,
641	.resume =	usbnet_resume,
642	.disable_hub_initiated_lpm = 1,
643};
644
645module_usb_driver(rndis_driver);
646
647MODULE_AUTHOR("David Brownell");
648MODULE_DESCRIPTION("USB Host side RNDIS driver");
649MODULE_LICENSE("GPL");
650