xref: /linux/drivers/net/usb/qmi_wwan.c (revision 8795a739e5c72abeec51caf36b6df2b37e5720c5)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2012  Bjørn Mork <bjorn@mork.no>
4  *
5  * The probing code is heavily inspired by cdc_ether, which is:
6  * Copyright (C) 2003-2005 by David Brownell
7  * Copyright (C) 2006 by Ole Andre Vadla Ravnas (ActiveSync)
8  */
9 
10 #include <linux/module.h>
11 #include <linux/sched/signal.h>
12 #include <linux/netdevice.h>
13 #include <linux/ethtool.h>
14 #include <linux/etherdevice.h>
15 #include <linux/if_arp.h>
16 #include <linux/mii.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/usb.h>
19 #include <linux/usb/cdc.h>
20 #include <linux/usb/usbnet.h>
21 #include <linux/usb/cdc-wdm.h>
22 #include <linux/u64_stats_sync.h>
23 
24 /* This driver supports wwan (3G/LTE/?) devices using a vendor
25  * specific management protocol called Qualcomm MSM Interface (QMI) -
26  * in addition to the more common AT commands over serial interface
27  * management
28  *
29  * QMI is wrapped in CDC, using CDC encapsulated commands on the
30  * control ("master") interface of a two-interface CDC Union
31  * resembling standard CDC ECM.  The devices do not use the control
32  * interface for any other CDC messages.  Most likely because the
33  * management protocol is used in place of the standard CDC
34  * notifications NOTIFY_NETWORK_CONNECTION and NOTIFY_SPEED_CHANGE
35  *
36  * Alternatively, control and data functions can be combined in a
37  * single USB interface.
38  *
39  * Handling a protocol like QMI is out of the scope for any driver.
40  * It is exported as a character device using the cdc-wdm driver as
41  * a subdriver, enabling userspace applications ("modem managers") to
42  * handle it.
43  *
44  * These devices may alternatively/additionally be configured using AT
45  * commands on a serial interface
46  */
47 
48 /* driver specific data */
49 struct qmi_wwan_state {
50 	struct usb_driver *subdriver;
51 	atomic_t pmcount;
52 	unsigned long flags;
53 	struct usb_interface *control;
54 	struct usb_interface *data;
55 };
56 
57 enum qmi_wwan_flags {
58 	QMI_WWAN_FLAG_RAWIP = 1 << 0,
59 	QMI_WWAN_FLAG_MUX = 1 << 1,
60 };
61 
62 enum qmi_wwan_quirks {
63 	QMI_WWAN_QUIRK_DTR = 1 << 0,	/* needs "set DTR" request */
64 	QMI_WWAN_QUIRK_QUECTEL_DYNCFG = 1 << 1,	/* check num. endpoints */
65 };
66 
67 struct qmimux_hdr {
68 	u8 pad;
69 	u8 mux_id;
70 	__be16 pkt_len;
71 };
72 
73 struct qmimux_priv {
74 	struct net_device *real_dev;
75 	u8 mux_id;
76 	struct pcpu_sw_netstats __percpu *stats64;
77 };
78 
79 static int qmimux_open(struct net_device *dev)
80 {
81 	struct qmimux_priv *priv = netdev_priv(dev);
82 	struct net_device *real_dev = priv->real_dev;
83 
84 	if (!(priv->real_dev->flags & IFF_UP))
85 		return -ENETDOWN;
86 
87 	if (netif_carrier_ok(real_dev))
88 		netif_carrier_on(dev);
89 	return 0;
90 }
91 
92 static int qmimux_stop(struct net_device *dev)
93 {
94 	netif_carrier_off(dev);
95 	return 0;
96 }
97 
98 static netdev_tx_t qmimux_start_xmit(struct sk_buff *skb, struct net_device *dev)
99 {
100 	struct qmimux_priv *priv = netdev_priv(dev);
101 	unsigned int len = skb->len;
102 	struct qmimux_hdr *hdr;
103 	netdev_tx_t ret;
104 
105 	hdr = skb_push(skb, sizeof(struct qmimux_hdr));
106 	hdr->pad = 0;
107 	hdr->mux_id = priv->mux_id;
108 	hdr->pkt_len = cpu_to_be16(len);
109 	skb->dev = priv->real_dev;
110 	ret = dev_queue_xmit(skb);
111 
112 	if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
113 		struct pcpu_sw_netstats *stats64 = this_cpu_ptr(priv->stats64);
114 
115 		u64_stats_update_begin(&stats64->syncp);
116 		stats64->tx_packets++;
117 		stats64->tx_bytes += len;
118 		u64_stats_update_end(&stats64->syncp);
119 	} else {
120 		dev->stats.tx_dropped++;
121 	}
122 
123 	return ret;
124 }
125 
126 static void qmimux_get_stats64(struct net_device *net,
127 			       struct rtnl_link_stats64 *stats)
128 {
129 	struct qmimux_priv *priv = netdev_priv(net);
130 	unsigned int start;
131 	int cpu;
132 
133 	netdev_stats_to_stats64(stats, &net->stats);
134 
135 	for_each_possible_cpu(cpu) {
136 		struct pcpu_sw_netstats *stats64;
137 		u64 rx_packets, rx_bytes;
138 		u64 tx_packets, tx_bytes;
139 
140 		stats64 = per_cpu_ptr(priv->stats64, cpu);
141 
142 		do {
143 			start = u64_stats_fetch_begin_irq(&stats64->syncp);
144 			rx_packets = stats64->rx_packets;
145 			rx_bytes = stats64->rx_bytes;
146 			tx_packets = stats64->tx_packets;
147 			tx_bytes = stats64->tx_bytes;
148 		} while (u64_stats_fetch_retry_irq(&stats64->syncp, start));
149 
150 		stats->rx_packets += rx_packets;
151 		stats->rx_bytes += rx_bytes;
152 		stats->tx_packets += tx_packets;
153 		stats->tx_bytes += tx_bytes;
154 	}
155 }
156 
157 static const struct net_device_ops qmimux_netdev_ops = {
158 	.ndo_open        = qmimux_open,
159 	.ndo_stop        = qmimux_stop,
160 	.ndo_start_xmit  = qmimux_start_xmit,
161 	.ndo_get_stats64 = qmimux_get_stats64,
162 };
163 
164 static void qmimux_setup(struct net_device *dev)
165 {
166 	dev->header_ops      = NULL;  /* No header */
167 	dev->type            = ARPHRD_NONE;
168 	dev->hard_header_len = 0;
169 	dev->addr_len        = 0;
170 	dev->flags           = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
171 	dev->netdev_ops      = &qmimux_netdev_ops;
172 	dev->mtu             = 1500;
173 	dev->needs_free_netdev = true;
174 }
175 
176 static struct net_device *qmimux_find_dev(struct usbnet *dev, u8 mux_id)
177 {
178 	struct qmimux_priv *priv;
179 	struct list_head *iter;
180 	struct net_device *ldev;
181 
182 	rcu_read_lock();
183 	netdev_for_each_upper_dev_rcu(dev->net, ldev, iter) {
184 		priv = netdev_priv(ldev);
185 		if (priv->mux_id == mux_id) {
186 			rcu_read_unlock();
187 			return ldev;
188 		}
189 	}
190 	rcu_read_unlock();
191 	return NULL;
192 }
193 
194 static bool qmimux_has_slaves(struct usbnet *dev)
195 {
196 	return !list_empty(&dev->net->adj_list.upper);
197 }
198 
199 static int qmimux_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
200 {
201 	unsigned int len, offset = 0, pad_len, pkt_len;
202 	struct qmimux_hdr *hdr;
203 	struct net_device *net;
204 	struct sk_buff *skbn;
205 	u8 qmimux_hdr_sz = sizeof(*hdr);
206 
207 	while (offset + qmimux_hdr_sz < skb->len) {
208 		hdr = (struct qmimux_hdr *)(skb->data + offset);
209 		len = be16_to_cpu(hdr->pkt_len);
210 
211 		/* drop the packet, bogus length */
212 		if (offset + len + qmimux_hdr_sz > skb->len)
213 			return 0;
214 
215 		/* control packet, we do not know what to do */
216 		if (hdr->pad & 0x80)
217 			goto skip;
218 
219 		/* extract padding length and check for valid length info */
220 		pad_len = hdr->pad & 0x3f;
221 		if (len == 0 || pad_len >= len)
222 			goto skip;
223 		pkt_len = len - pad_len;
224 
225 		net = qmimux_find_dev(dev, hdr->mux_id);
226 		if (!net)
227 			goto skip;
228 		skbn = netdev_alloc_skb(net, pkt_len);
229 		if (!skbn)
230 			return 0;
231 		skbn->dev = net;
232 
233 		switch (skb->data[offset + qmimux_hdr_sz] & 0xf0) {
234 		case 0x40:
235 			skbn->protocol = htons(ETH_P_IP);
236 			break;
237 		case 0x60:
238 			skbn->protocol = htons(ETH_P_IPV6);
239 			break;
240 		default:
241 			/* not ip - do not know what to do */
242 			goto skip;
243 		}
244 
245 		skb_put_data(skbn, skb->data + offset + qmimux_hdr_sz, pkt_len);
246 		if (netif_rx(skbn) != NET_RX_SUCCESS) {
247 			net->stats.rx_errors++;
248 			return 0;
249 		} else {
250 			struct pcpu_sw_netstats *stats64;
251 			struct qmimux_priv *priv = netdev_priv(net);
252 
253 			stats64 = this_cpu_ptr(priv->stats64);
254 			u64_stats_update_begin(&stats64->syncp);
255 			stats64->rx_packets++;
256 			stats64->rx_bytes += pkt_len;
257 			u64_stats_update_end(&stats64->syncp);
258 		}
259 
260 skip:
261 		offset += len + qmimux_hdr_sz;
262 	}
263 	return 1;
264 }
265 
266 static int qmimux_register_device(struct net_device *real_dev, u8 mux_id)
267 {
268 	struct net_device *new_dev;
269 	struct qmimux_priv *priv;
270 	int err;
271 
272 	new_dev = alloc_netdev(sizeof(struct qmimux_priv),
273 			       "qmimux%d", NET_NAME_UNKNOWN, qmimux_setup);
274 	if (!new_dev)
275 		return -ENOBUFS;
276 
277 	dev_net_set(new_dev, dev_net(real_dev));
278 	priv = netdev_priv(new_dev);
279 	priv->mux_id = mux_id;
280 	priv->real_dev = real_dev;
281 
282 	priv->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
283 	if (!priv->stats64) {
284 		err = -ENOBUFS;
285 		goto out_free_newdev;
286 	}
287 
288 	err = register_netdevice(new_dev);
289 	if (err < 0)
290 		goto out_free_newdev;
291 
292 	/* Account for reference in struct qmimux_priv_priv */
293 	dev_hold(real_dev);
294 
295 	err = netdev_upper_dev_link(real_dev, new_dev, NULL);
296 	if (err)
297 		goto out_unregister_netdev;
298 
299 	netif_stacked_transfer_operstate(real_dev, new_dev);
300 
301 	return 0;
302 
303 out_unregister_netdev:
304 	unregister_netdevice(new_dev);
305 	dev_put(real_dev);
306 
307 out_free_newdev:
308 	free_netdev(new_dev);
309 	return err;
310 }
311 
312 static void qmimux_unregister_device(struct net_device *dev,
313 				     struct list_head *head)
314 {
315 	struct qmimux_priv *priv = netdev_priv(dev);
316 	struct net_device *real_dev = priv->real_dev;
317 
318 	free_percpu(priv->stats64);
319 	netdev_upper_dev_unlink(real_dev, dev);
320 	unregister_netdevice_queue(dev, head);
321 
322 	/* Get rid of the reference to real_dev */
323 	dev_put(real_dev);
324 }
325 
326 static void qmi_wwan_netdev_setup(struct net_device *net)
327 {
328 	struct usbnet *dev = netdev_priv(net);
329 	struct qmi_wwan_state *info = (void *)&dev->data;
330 
331 	if (info->flags & QMI_WWAN_FLAG_RAWIP) {
332 		net->header_ops      = NULL;  /* No header */
333 		net->type            = ARPHRD_NONE;
334 		net->hard_header_len = 0;
335 		net->addr_len        = 0;
336 		net->flags           = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
337 		set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
338 		netdev_dbg(net, "mode: raw IP\n");
339 	} else if (!net->header_ops) { /* don't bother if already set */
340 		ether_setup(net);
341 		clear_bit(EVENT_NO_IP_ALIGN, &dev->flags);
342 		netdev_dbg(net, "mode: Ethernet\n");
343 	}
344 
345 	/* recalculate buffers after changing hard_header_len */
346 	usbnet_change_mtu(net, net->mtu);
347 }
348 
349 static ssize_t raw_ip_show(struct device *d, struct device_attribute *attr, char *buf)
350 {
351 	struct usbnet *dev = netdev_priv(to_net_dev(d));
352 	struct qmi_wwan_state *info = (void *)&dev->data;
353 
354 	return sprintf(buf, "%c\n", info->flags & QMI_WWAN_FLAG_RAWIP ? 'Y' : 'N');
355 }
356 
357 static ssize_t raw_ip_store(struct device *d,  struct device_attribute *attr, const char *buf, size_t len)
358 {
359 	struct usbnet *dev = netdev_priv(to_net_dev(d));
360 	struct qmi_wwan_state *info = (void *)&dev->data;
361 	bool enable;
362 	int ret;
363 
364 	if (strtobool(buf, &enable))
365 		return -EINVAL;
366 
367 	/* no change? */
368 	if (enable == (info->flags & QMI_WWAN_FLAG_RAWIP))
369 		return len;
370 
371 	if (!rtnl_trylock())
372 		return restart_syscall();
373 
374 	/* we don't want to modify a running netdev */
375 	if (netif_running(dev->net)) {
376 		netdev_err(dev->net, "Cannot change a running device\n");
377 		ret = -EBUSY;
378 		goto err;
379 	}
380 
381 	/* let other drivers deny the change */
382 	ret = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev->net);
383 	ret = notifier_to_errno(ret);
384 	if (ret) {
385 		netdev_err(dev->net, "Type change was refused\n");
386 		goto err;
387 	}
388 
389 	if (enable)
390 		info->flags |= QMI_WWAN_FLAG_RAWIP;
391 	else
392 		info->flags &= ~QMI_WWAN_FLAG_RAWIP;
393 	qmi_wwan_netdev_setup(dev->net);
394 	call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev->net);
395 	ret = len;
396 err:
397 	rtnl_unlock();
398 	return ret;
399 }
400 
401 static ssize_t add_mux_show(struct device *d, struct device_attribute *attr, char *buf)
402 {
403 	struct net_device *dev = to_net_dev(d);
404 	struct qmimux_priv *priv;
405 	struct list_head *iter;
406 	struct net_device *ldev;
407 	ssize_t count = 0;
408 
409 	rcu_read_lock();
410 	netdev_for_each_upper_dev_rcu(dev, ldev, iter) {
411 		priv = netdev_priv(ldev);
412 		count += scnprintf(&buf[count], PAGE_SIZE - count,
413 				   "0x%02x\n", priv->mux_id);
414 	}
415 	rcu_read_unlock();
416 	return count;
417 }
418 
419 static ssize_t add_mux_store(struct device *d,  struct device_attribute *attr, const char *buf, size_t len)
420 {
421 	struct usbnet *dev = netdev_priv(to_net_dev(d));
422 	struct qmi_wwan_state *info = (void *)&dev->data;
423 	u8 mux_id;
424 	int ret;
425 
426 	if (kstrtou8(buf, 0, &mux_id))
427 		return -EINVAL;
428 
429 	/* mux_id [1 - 254] for compatibility with ip(8) and the rmnet driver */
430 	if (mux_id < 1 || mux_id > 254)
431 		return -EINVAL;
432 
433 	if (!rtnl_trylock())
434 		return restart_syscall();
435 
436 	if (qmimux_find_dev(dev, mux_id)) {
437 		netdev_err(dev->net, "mux_id already present\n");
438 		ret = -EINVAL;
439 		goto err;
440 	}
441 
442 	/* we don't want to modify a running netdev */
443 	if (netif_running(dev->net)) {
444 		netdev_err(dev->net, "Cannot change a running device\n");
445 		ret = -EBUSY;
446 		goto err;
447 	}
448 
449 	ret = qmimux_register_device(dev->net, mux_id);
450 	if (!ret) {
451 		info->flags |= QMI_WWAN_FLAG_MUX;
452 		ret = len;
453 	}
454 err:
455 	rtnl_unlock();
456 	return ret;
457 }
458 
459 static ssize_t del_mux_show(struct device *d, struct device_attribute *attr, char *buf)
460 {
461 	return add_mux_show(d, attr, buf);
462 }
463 
464 static ssize_t del_mux_store(struct device *d,  struct device_attribute *attr, const char *buf, size_t len)
465 {
466 	struct usbnet *dev = netdev_priv(to_net_dev(d));
467 	struct qmi_wwan_state *info = (void *)&dev->data;
468 	struct net_device *del_dev;
469 	u8 mux_id;
470 	int ret = 0;
471 
472 	if (kstrtou8(buf, 0, &mux_id))
473 		return -EINVAL;
474 
475 	if (!rtnl_trylock())
476 		return restart_syscall();
477 
478 	/* we don't want to modify a running netdev */
479 	if (netif_running(dev->net)) {
480 		netdev_err(dev->net, "Cannot change a running device\n");
481 		ret = -EBUSY;
482 		goto err;
483 	}
484 
485 	del_dev = qmimux_find_dev(dev, mux_id);
486 	if (!del_dev) {
487 		netdev_err(dev->net, "mux_id not present\n");
488 		ret = -EINVAL;
489 		goto err;
490 	}
491 	qmimux_unregister_device(del_dev, NULL);
492 
493 	if (!qmimux_has_slaves(dev))
494 		info->flags &= ~QMI_WWAN_FLAG_MUX;
495 	ret = len;
496 err:
497 	rtnl_unlock();
498 	return ret;
499 }
500 
501 static DEVICE_ATTR_RW(raw_ip);
502 static DEVICE_ATTR_RW(add_mux);
503 static DEVICE_ATTR_RW(del_mux);
504 
505 static struct attribute *qmi_wwan_sysfs_attrs[] = {
506 	&dev_attr_raw_ip.attr,
507 	&dev_attr_add_mux.attr,
508 	&dev_attr_del_mux.attr,
509 	NULL,
510 };
511 
512 static struct attribute_group qmi_wwan_sysfs_attr_group = {
513 	.name = "qmi",
514 	.attrs = qmi_wwan_sysfs_attrs,
515 };
516 
517 /* default ethernet address used by the modem */
518 static const u8 default_modem_addr[ETH_ALEN] = {0x02, 0x50, 0xf3};
519 
520 static const u8 buggy_fw_addr[ETH_ALEN] = {0x00, 0xa0, 0xc6, 0x00, 0x00, 0x00};
521 
522 /* Make up an ethernet header if the packet doesn't have one.
523  *
524  * A firmware bug common among several devices cause them to send raw
525  * IP packets under some circumstances.  There is no way for the
526  * driver/host to know when this will happen.  And even when the bug
527  * hits, some packets will still arrive with an intact header.
528  *
529  * The supported devices are only capably of sending IPv4, IPv6 and
530  * ARP packets on a point-to-point link. Any packet with an ethernet
531  * header will have either our address or a broadcast/multicast
532  * address as destination.  ARP packets will always have a header.
533  *
534  * This means that this function will reliably add the appropriate
535  * header iff necessary, provided our hardware address does not start
536  * with 4 or 6.
537  *
538  * Another common firmware bug results in all packets being addressed
539  * to 00:a0:c6:00:00:00 despite the host address being different.
540  * This function will also fixup such packets.
541  */
542 static int qmi_wwan_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
543 {
544 	struct qmi_wwan_state *info = (void *)&dev->data;
545 	bool rawip = info->flags & QMI_WWAN_FLAG_RAWIP;
546 	__be16 proto;
547 
548 	/* This check is no longer done by usbnet */
549 	if (skb->len < dev->net->hard_header_len)
550 		return 0;
551 
552 	if (info->flags & QMI_WWAN_FLAG_MUX)
553 		return qmimux_rx_fixup(dev, skb);
554 
555 	switch (skb->data[0] & 0xf0) {
556 	case 0x40:
557 		proto = htons(ETH_P_IP);
558 		break;
559 	case 0x60:
560 		proto = htons(ETH_P_IPV6);
561 		break;
562 	case 0x00:
563 		if (rawip)
564 			return 0;
565 		if (is_multicast_ether_addr(skb->data))
566 			return 1;
567 		/* possibly bogus destination - rewrite just in case */
568 		skb_reset_mac_header(skb);
569 		goto fix_dest;
570 	default:
571 		if (rawip)
572 			return 0;
573 		/* pass along other packets without modifications */
574 		return 1;
575 	}
576 	if (rawip) {
577 		skb_reset_mac_header(skb);
578 		skb->dev = dev->net; /* normally set by eth_type_trans */
579 		skb->protocol = proto;
580 		return 1;
581 	}
582 
583 	if (skb_headroom(skb) < ETH_HLEN)
584 		return 0;
585 	skb_push(skb, ETH_HLEN);
586 	skb_reset_mac_header(skb);
587 	eth_hdr(skb)->h_proto = proto;
588 	eth_zero_addr(eth_hdr(skb)->h_source);
589 fix_dest:
590 	memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
591 	return 1;
592 }
593 
594 /* very simplistic detection of IPv4 or IPv6 headers */
595 static bool possibly_iphdr(const char *data)
596 {
597 	return (data[0] & 0xd0) == 0x40;
598 }
599 
600 /* disallow addresses which may be confused with IP headers */
601 static int qmi_wwan_mac_addr(struct net_device *dev, void *p)
602 {
603 	int ret;
604 	struct sockaddr *addr = p;
605 
606 	ret = eth_prepare_mac_addr_change(dev, p);
607 	if (ret < 0)
608 		return ret;
609 	if (possibly_iphdr(addr->sa_data))
610 		return -EADDRNOTAVAIL;
611 	eth_commit_mac_addr_change(dev, p);
612 	return 0;
613 }
614 
615 static const struct net_device_ops qmi_wwan_netdev_ops = {
616 	.ndo_open		= usbnet_open,
617 	.ndo_stop		= usbnet_stop,
618 	.ndo_start_xmit		= usbnet_start_xmit,
619 	.ndo_tx_timeout		= usbnet_tx_timeout,
620 	.ndo_change_mtu		= usbnet_change_mtu,
621 	.ndo_get_stats64	= usbnet_get_stats64,
622 	.ndo_set_mac_address	= qmi_wwan_mac_addr,
623 	.ndo_validate_addr	= eth_validate_addr,
624 };
625 
626 /* using a counter to merge subdriver requests with our own into a
627  * combined state
628  */
629 static int qmi_wwan_manage_power(struct usbnet *dev, int on)
630 {
631 	struct qmi_wwan_state *info = (void *)&dev->data;
632 	int rv;
633 
634 	dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d\n", __func__,
635 		atomic_read(&info->pmcount), on);
636 
637 	if ((on && atomic_add_return(1, &info->pmcount) == 1) ||
638 	    (!on && atomic_dec_and_test(&info->pmcount))) {
639 		/* need autopm_get/put here to ensure the usbcore sees
640 		 * the new value
641 		 */
642 		rv = usb_autopm_get_interface(dev->intf);
643 		dev->intf->needs_remote_wakeup = on;
644 		if (!rv)
645 			usb_autopm_put_interface(dev->intf);
646 	}
647 	return 0;
648 }
649 
650 static int qmi_wwan_cdc_wdm_manage_power(struct usb_interface *intf, int on)
651 {
652 	struct usbnet *dev = usb_get_intfdata(intf);
653 
654 	/* can be called while disconnecting */
655 	if (!dev)
656 		return 0;
657 	return qmi_wwan_manage_power(dev, on);
658 }
659 
660 /* collect all three endpoints and register subdriver */
661 static int qmi_wwan_register_subdriver(struct usbnet *dev)
662 {
663 	int rv;
664 	struct usb_driver *subdriver = NULL;
665 	struct qmi_wwan_state *info = (void *)&dev->data;
666 
667 	/* collect bulk endpoints */
668 	rv = usbnet_get_endpoints(dev, info->data);
669 	if (rv < 0)
670 		goto err;
671 
672 	/* update status endpoint if separate control interface */
673 	if (info->control != info->data)
674 		dev->status = &info->control->cur_altsetting->endpoint[0];
675 
676 	/* require interrupt endpoint for subdriver */
677 	if (!dev->status) {
678 		rv = -EINVAL;
679 		goto err;
680 	}
681 
682 	/* for subdriver power management */
683 	atomic_set(&info->pmcount, 0);
684 
685 	/* register subdriver */
686 	subdriver = usb_cdc_wdm_register(info->control, &dev->status->desc,
687 					 4096, &qmi_wwan_cdc_wdm_manage_power);
688 	if (IS_ERR(subdriver)) {
689 		dev_err(&info->control->dev, "subdriver registration failed\n");
690 		rv = PTR_ERR(subdriver);
691 		goto err;
692 	}
693 
694 	/* prevent usbnet from using status endpoint */
695 	dev->status = NULL;
696 
697 	/* save subdriver struct for suspend/resume wrappers */
698 	info->subdriver = subdriver;
699 
700 err:
701 	return rv;
702 }
703 
704 /* Send CDC SetControlLineState request, setting or clearing the DTR.
705  * "Required for Autoconnect and 9x30 to wake up" according to the
706  * GobiNet driver. The requirement has been verified on an MDM9230
707  * based Sierra Wireless MC7455
708  */
709 static int qmi_wwan_change_dtr(struct usbnet *dev, bool on)
710 {
711 	u8 intf = dev->intf->cur_altsetting->desc.bInterfaceNumber;
712 
713 	return usbnet_write_cmd(dev, USB_CDC_REQ_SET_CONTROL_LINE_STATE,
714 				USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
715 				on ? 0x01 : 0x00, intf, NULL, 0);
716 }
717 
718 static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf)
719 {
720 	int status = -1;
721 	u8 *buf = intf->cur_altsetting->extra;
722 	int len = intf->cur_altsetting->extralen;
723 	struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
724 	struct usb_cdc_union_desc *cdc_union;
725 	struct usb_cdc_ether_desc *cdc_ether;
726 	struct usb_driver *driver = driver_of(intf);
727 	struct qmi_wwan_state *info = (void *)&dev->data;
728 	struct usb_cdc_parsed_header hdr;
729 
730 	BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data) <
731 		      sizeof(struct qmi_wwan_state)));
732 
733 	/* set up initial state */
734 	info->control = intf;
735 	info->data = intf;
736 
737 	/* and a number of CDC descriptors */
738 	cdc_parse_cdc_header(&hdr, intf, buf, len);
739 	cdc_union = hdr.usb_cdc_union_desc;
740 	cdc_ether = hdr.usb_cdc_ether_desc;
741 
742 	/* Use separate control and data interfaces if we found a CDC Union */
743 	if (cdc_union) {
744 		info->data = usb_ifnum_to_if(dev->udev,
745 					     cdc_union->bSlaveInterface0);
746 		if (desc->bInterfaceNumber != cdc_union->bMasterInterface0 ||
747 		    !info->data) {
748 			dev_err(&intf->dev,
749 				"bogus CDC Union: master=%u, slave=%u\n",
750 				cdc_union->bMasterInterface0,
751 				cdc_union->bSlaveInterface0);
752 
753 			/* ignore and continue... */
754 			cdc_union = NULL;
755 			info->data = intf;
756 		}
757 	}
758 
759 	/* errors aren't fatal - we can live with the dynamic address */
760 	if (cdc_ether && cdc_ether->wMaxSegmentSize) {
761 		dev->hard_mtu = le16_to_cpu(cdc_ether->wMaxSegmentSize);
762 		usbnet_get_ethernet_addr(dev, cdc_ether->iMACAddress);
763 	}
764 
765 	/* claim data interface and set it up */
766 	if (info->control != info->data) {
767 		status = usb_driver_claim_interface(driver, info->data, dev);
768 		if (status < 0)
769 			goto err;
770 	}
771 
772 	status = qmi_wwan_register_subdriver(dev);
773 	if (status < 0 && info->control != info->data) {
774 		usb_set_intfdata(info->data, NULL);
775 		usb_driver_release_interface(driver, info->data);
776 	}
777 
778 	/* disabling remote wakeup on MDM9x30 devices has the same
779 	 * effect as clearing DTR. The device will not respond to QMI
780 	 * requests until we set DTR again.  This is similar to a
781 	 * QMI_CTL SYNC request, clearing a lot of firmware state
782 	 * including the client ID allocations.
783 	 *
784 	 * Our usage model allows a session to span multiple
785 	 * open/close events, so we must prevent the firmware from
786 	 * clearing out state the clients might need.
787 	 *
788 	 * MDM9x30 is the first QMI chipset with USB3 support. Abuse
789 	 * this fact to enable the quirk for all USB3 devices.
790 	 *
791 	 * There are also chipsets with the same "set DTR" requirement
792 	 * but without USB3 support.  Devices based on these chips
793 	 * need a quirk flag in the device ID table.
794 	 */
795 	if (dev->driver_info->data & QMI_WWAN_QUIRK_DTR ||
796 	    le16_to_cpu(dev->udev->descriptor.bcdUSB) >= 0x0201) {
797 		qmi_wwan_manage_power(dev, 1);
798 		qmi_wwan_change_dtr(dev, true);
799 	}
800 
801 	/* Never use the same address on both ends of the link, even if the
802 	 * buggy firmware told us to. Or, if device is assigned the well-known
803 	 * buggy firmware MAC address, replace it with a random address,
804 	 */
805 	if (ether_addr_equal(dev->net->dev_addr, default_modem_addr) ||
806 	    ether_addr_equal(dev->net->dev_addr, buggy_fw_addr))
807 		eth_hw_addr_random(dev->net);
808 
809 	/* make MAC addr easily distinguishable from an IP header */
810 	if (possibly_iphdr(dev->net->dev_addr)) {
811 		dev->net->dev_addr[0] |= 0x02;	/* set local assignment bit */
812 		dev->net->dev_addr[0] &= 0xbf;	/* clear "IP" bit */
813 	}
814 	dev->net->netdev_ops = &qmi_wwan_netdev_ops;
815 	dev->net->sysfs_groups[0] = &qmi_wwan_sysfs_attr_group;
816 err:
817 	return status;
818 }
819 
820 static void qmi_wwan_unbind(struct usbnet *dev, struct usb_interface *intf)
821 {
822 	struct qmi_wwan_state *info = (void *)&dev->data;
823 	struct usb_driver *driver = driver_of(intf);
824 	struct usb_interface *other;
825 
826 	if (info->subdriver && info->subdriver->disconnect)
827 		info->subdriver->disconnect(info->control);
828 
829 	/* disable MDM9x30 quirk */
830 	if (le16_to_cpu(dev->udev->descriptor.bcdUSB) >= 0x0201) {
831 		qmi_wwan_change_dtr(dev, false);
832 		qmi_wwan_manage_power(dev, 0);
833 	}
834 
835 	/* allow user to unbind using either control or data */
836 	if (intf == info->control)
837 		other = info->data;
838 	else
839 		other = info->control;
840 
841 	/* only if not shared */
842 	if (other && intf != other) {
843 		usb_set_intfdata(other, NULL);
844 		usb_driver_release_interface(driver, other);
845 	}
846 
847 	info->subdriver = NULL;
848 	info->data = NULL;
849 	info->control = NULL;
850 }
851 
852 /* suspend/resume wrappers calling both usbnet and the cdc-wdm
853  * subdriver if present.
854  *
855  * NOTE: cdc-wdm also supports pre/post_reset, but we cannot provide
856  * wrappers for those without adding usbnet reset support first.
857  */
858 static int qmi_wwan_suspend(struct usb_interface *intf, pm_message_t message)
859 {
860 	struct usbnet *dev = usb_get_intfdata(intf);
861 	struct qmi_wwan_state *info = (void *)&dev->data;
862 	int ret;
863 
864 	/* Both usbnet_suspend() and subdriver->suspend() MUST return 0
865 	 * in system sleep context, otherwise, the resume callback has
866 	 * to recover device from previous suspend failure.
867 	 */
868 	ret = usbnet_suspend(intf, message);
869 	if (ret < 0)
870 		goto err;
871 
872 	if (intf == info->control && info->subdriver &&
873 	    info->subdriver->suspend)
874 		ret = info->subdriver->suspend(intf, message);
875 	if (ret < 0)
876 		usbnet_resume(intf);
877 err:
878 	return ret;
879 }
880 
881 static int qmi_wwan_resume(struct usb_interface *intf)
882 {
883 	struct usbnet *dev = usb_get_intfdata(intf);
884 	struct qmi_wwan_state *info = (void *)&dev->data;
885 	int ret = 0;
886 	bool callsub = (intf == info->control && info->subdriver &&
887 			info->subdriver->resume);
888 
889 	if (callsub)
890 		ret = info->subdriver->resume(intf);
891 	if (ret < 0)
892 		goto err;
893 	ret = usbnet_resume(intf);
894 	if (ret < 0 && callsub)
895 		info->subdriver->suspend(intf, PMSG_SUSPEND);
896 err:
897 	return ret;
898 }
899 
900 static const struct driver_info	qmi_wwan_info = {
901 	.description	= "WWAN/QMI device",
902 	.flags		= FLAG_WWAN | FLAG_SEND_ZLP,
903 	.bind		= qmi_wwan_bind,
904 	.unbind		= qmi_wwan_unbind,
905 	.manage_power	= qmi_wwan_manage_power,
906 	.rx_fixup       = qmi_wwan_rx_fixup,
907 };
908 
909 static const struct driver_info	qmi_wwan_info_quirk_dtr = {
910 	.description	= "WWAN/QMI device",
911 	.flags		= FLAG_WWAN | FLAG_SEND_ZLP,
912 	.bind		= qmi_wwan_bind,
913 	.unbind		= qmi_wwan_unbind,
914 	.manage_power	= qmi_wwan_manage_power,
915 	.rx_fixup       = qmi_wwan_rx_fixup,
916 	.data           = QMI_WWAN_QUIRK_DTR,
917 };
918 
919 static const struct driver_info	qmi_wwan_info_quirk_quectel_dyncfg = {
920 	.description	= "WWAN/QMI device",
921 	.flags		= FLAG_WWAN | FLAG_SEND_ZLP,
922 	.bind		= qmi_wwan_bind,
923 	.unbind		= qmi_wwan_unbind,
924 	.manage_power	= qmi_wwan_manage_power,
925 	.rx_fixup       = qmi_wwan_rx_fixup,
926 	.data           = QMI_WWAN_QUIRK_DTR | QMI_WWAN_QUIRK_QUECTEL_DYNCFG,
927 };
928 
929 #define HUAWEI_VENDOR_ID	0x12D1
930 
931 /* map QMI/wwan function by a fixed interface number */
932 #define QMI_FIXED_INTF(vend, prod, num) \
933 	USB_DEVICE_INTERFACE_NUMBER(vend, prod, num), \
934 	.driver_info = (unsigned long)&qmi_wwan_info
935 
936 /* devices requiring "set DTR" quirk */
937 #define QMI_QUIRK_SET_DTR(vend, prod, num) \
938 	USB_DEVICE_INTERFACE_NUMBER(vend, prod, num), \
939 	.driver_info = (unsigned long)&qmi_wwan_info_quirk_dtr
940 
941 /* Gobi 1000 QMI/wwan interface number is 3 according to qcserial */
942 #define QMI_GOBI1K_DEVICE(vend, prod) \
943 	QMI_FIXED_INTF(vend, prod, 3)
944 
945 /* Gobi 2000/3000 QMI/wwan interface number is 0 according to qcserial */
946 #define QMI_GOBI_DEVICE(vend, prod) \
947 	QMI_FIXED_INTF(vend, prod, 0)
948 
949 /* Quectel does not use fixed interface numbers on at least some of their
950  * devices. We need to check the number of endpoints to ensure that we bind to
951  * the correct interface.
952  */
953 #define QMI_QUIRK_QUECTEL_DYNCFG(vend, prod) \
954 	USB_DEVICE_AND_INTERFACE_INFO(vend, prod, USB_CLASS_VENDOR_SPEC, \
955 				      USB_SUBCLASS_VENDOR_SPEC, 0xff), \
956 	.driver_info = (unsigned long)&qmi_wwan_info_quirk_quectel_dyncfg
957 
958 static const struct usb_device_id products[] = {
959 	/* 1. CDC ECM like devices match on the control interface */
960 	{	/* Huawei E392, E398 and possibly others sharing both device id and more... */
961 		USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 9),
962 		.driver_info        = (unsigned long)&qmi_wwan_info,
963 	},
964 	{	/* Vodafone/Huawei K5005 (12d1:14c8) and similar modems */
965 		USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 57),
966 		.driver_info        = (unsigned long)&qmi_wwan_info,
967 	},
968 	{	/* HUAWEI_INTERFACE_NDIS_CONTROL_QUALCOMM */
969 		USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 0x01, 0x69),
970 		.driver_info        = (unsigned long)&qmi_wwan_info,
971 	},
972 	{	/* Motorola Mapphone devices with MDM6600 */
973 		USB_VENDOR_AND_INTERFACE_INFO(0x22b8, USB_CLASS_VENDOR_SPEC, 0xfb, 0xff),
974 		.driver_info        = (unsigned long)&qmi_wwan_info,
975 	},
976 
977 	/* 2. Combined interface devices matching on class+protocol */
978 	{	/* Huawei E367 and possibly others in "Windows mode" */
979 		USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 7),
980 		.driver_info        = (unsigned long)&qmi_wwan_info,
981 	},
982 	{	/* Huawei E392, E398 and possibly others in "Windows mode" */
983 		USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 1, 17),
984 		.driver_info        = (unsigned long)&qmi_wwan_info,
985 	},
986 	{	/* HUAWEI_NDIS_SINGLE_INTERFACE_VDF */
987 		USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 0x01, 0x37),
988 		.driver_info        = (unsigned long)&qmi_wwan_info,
989 	},
990 	{	/* HUAWEI_INTERFACE_NDIS_HW_QUALCOMM */
991 		USB_VENDOR_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, USB_CLASS_VENDOR_SPEC, 0x01, 0x67),
992 		.driver_info        = (unsigned long)&qmi_wwan_info,
993 	},
994 	{	/* Pantech UML290, P4200 and more */
995 		USB_VENDOR_AND_INTERFACE_INFO(0x106c, USB_CLASS_VENDOR_SPEC, 0xf0, 0xff),
996 		.driver_info        = (unsigned long)&qmi_wwan_info,
997 	},
998 	{	/* Pantech UML290 - newer firmware */
999 		USB_VENDOR_AND_INTERFACE_INFO(0x106c, USB_CLASS_VENDOR_SPEC, 0xf1, 0xff),
1000 		.driver_info        = (unsigned long)&qmi_wwan_info,
1001 	},
1002 	{	/* Novatel USB551L and MC551 */
1003 		USB_DEVICE_AND_INTERFACE_INFO(0x1410, 0xb001,
1004 		                              USB_CLASS_COMM,
1005 		                              USB_CDC_SUBCLASS_ETHERNET,
1006 		                              USB_CDC_PROTO_NONE),
1007 		.driver_info        = (unsigned long)&qmi_wwan_info,
1008 	},
1009 	{	/* Novatel E362 */
1010 		USB_DEVICE_AND_INTERFACE_INFO(0x1410, 0x9010,
1011 		                              USB_CLASS_COMM,
1012 		                              USB_CDC_SUBCLASS_ETHERNET,
1013 		                              USB_CDC_PROTO_NONE),
1014 		.driver_info        = (unsigned long)&qmi_wwan_info,
1015 	},
1016 	{	/* Novatel Expedite E371 */
1017 		USB_DEVICE_AND_INTERFACE_INFO(0x1410, 0x9011,
1018 		                              USB_CLASS_COMM,
1019 		                              USB_CDC_SUBCLASS_ETHERNET,
1020 		                              USB_CDC_PROTO_NONE),
1021 		.driver_info        = (unsigned long)&qmi_wwan_info,
1022 	},
1023 	{	/* Dell Wireless 5800 (Novatel E362) */
1024 		USB_DEVICE_AND_INTERFACE_INFO(0x413C, 0x8195,
1025 					      USB_CLASS_COMM,
1026 					      USB_CDC_SUBCLASS_ETHERNET,
1027 					      USB_CDC_PROTO_NONE),
1028 		.driver_info        = (unsigned long)&qmi_wwan_info,
1029 	},
1030 	{	/* Dell Wireless 5800 V2 (Novatel E362) */
1031 		USB_DEVICE_AND_INTERFACE_INFO(0x413C, 0x8196,
1032 					      USB_CLASS_COMM,
1033 					      USB_CDC_SUBCLASS_ETHERNET,
1034 					      USB_CDC_PROTO_NONE),
1035 		.driver_info        = (unsigned long)&qmi_wwan_info,
1036 	},
1037 	{	/* Dell Wireless 5804 (Novatel E371) */
1038 		USB_DEVICE_AND_INTERFACE_INFO(0x413C, 0x819b,
1039 					      USB_CLASS_COMM,
1040 					      USB_CDC_SUBCLASS_ETHERNET,
1041 					      USB_CDC_PROTO_NONE),
1042 		.driver_info        = (unsigned long)&qmi_wwan_info,
1043 	},
1044 	{	/* ADU960S */
1045 		USB_DEVICE_AND_INTERFACE_INFO(0x16d5, 0x650a,
1046 					      USB_CLASS_COMM,
1047 					      USB_CDC_SUBCLASS_ETHERNET,
1048 					      USB_CDC_PROTO_NONE),
1049 		.driver_info        = (unsigned long)&qmi_wwan_info,
1050 	},
1051 	{	/* HP lt2523 (Novatel E371) */
1052 		USB_DEVICE_AND_INTERFACE_INFO(0x03f0, 0x421d,
1053 					      USB_CLASS_COMM,
1054 					      USB_CDC_SUBCLASS_ETHERNET,
1055 					      USB_CDC_PROTO_NONE),
1056 		.driver_info        = (unsigned long)&qmi_wwan_info,
1057 	},
1058 	{	/* HP lt4112 LTE/HSPA+ Gobi 4G Module (Huawei me906e) */
1059 		USB_DEVICE_AND_INTERFACE_INFO(0x03f0, 0x581d, USB_CLASS_VENDOR_SPEC, 1, 7),
1060 		.driver_info = (unsigned long)&qmi_wwan_info,
1061 	},
1062 	{QMI_QUIRK_QUECTEL_DYNCFG(0x2c7c, 0x0125)},	/* Quectel EC25, EC20 R2.0  Mini PCIe */
1063 	{QMI_QUIRK_QUECTEL_DYNCFG(0x2c7c, 0x0306)},	/* Quectel EP06/EG06/EM06 */
1064 	{QMI_QUIRK_QUECTEL_DYNCFG(0x2c7c, 0x0512)},	/* Quectel EG12/EM12 */
1065 
1066 	/* 3. Combined interface devices matching on interface number */
1067 	{QMI_FIXED_INTF(0x0408, 0xea42, 4)},	/* Yota / Megafon M100-1 */
1068 	{QMI_FIXED_INTF(0x05c6, 0x6001, 3)},	/* 4G LTE usb-modem U901 */
1069 	{QMI_FIXED_INTF(0x05c6, 0x7000, 0)},
1070 	{QMI_FIXED_INTF(0x05c6, 0x7001, 1)},
1071 	{QMI_FIXED_INTF(0x05c6, 0x7002, 1)},
1072 	{QMI_FIXED_INTF(0x05c6, 0x7101, 1)},
1073 	{QMI_FIXED_INTF(0x05c6, 0x7101, 2)},
1074 	{QMI_FIXED_INTF(0x05c6, 0x7101, 3)},
1075 	{QMI_FIXED_INTF(0x05c6, 0x7102, 1)},
1076 	{QMI_FIXED_INTF(0x05c6, 0x7102, 2)},
1077 	{QMI_FIXED_INTF(0x05c6, 0x7102, 3)},
1078 	{QMI_FIXED_INTF(0x05c6, 0x8000, 7)},
1079 	{QMI_FIXED_INTF(0x05c6, 0x8001, 6)},
1080 	{QMI_FIXED_INTF(0x05c6, 0x9000, 4)},
1081 	{QMI_FIXED_INTF(0x05c6, 0x9003, 4)},
1082 	{QMI_FIXED_INTF(0x05c6, 0x9005, 2)},
1083 	{QMI_FIXED_INTF(0x05c6, 0x900a, 4)},
1084 	{QMI_FIXED_INTF(0x05c6, 0x900b, 2)},
1085 	{QMI_FIXED_INTF(0x05c6, 0x900c, 4)},
1086 	{QMI_FIXED_INTF(0x05c6, 0x900c, 5)},
1087 	{QMI_FIXED_INTF(0x05c6, 0x900c, 6)},
1088 	{QMI_FIXED_INTF(0x05c6, 0x900d, 5)},
1089 	{QMI_FIXED_INTF(0x05c6, 0x900f, 3)},
1090 	{QMI_FIXED_INTF(0x05c6, 0x900f, 4)},
1091 	{QMI_FIXED_INTF(0x05c6, 0x900f, 5)},
1092 	{QMI_FIXED_INTF(0x05c6, 0x9010, 4)},
1093 	{QMI_FIXED_INTF(0x05c6, 0x9010, 5)},
1094 	{QMI_FIXED_INTF(0x05c6, 0x9011, 3)},
1095 	{QMI_FIXED_INTF(0x05c6, 0x9011, 4)},
1096 	{QMI_FIXED_INTF(0x05c6, 0x9021, 1)},
1097 	{QMI_FIXED_INTF(0x05c6, 0x9022, 2)},
1098 	{QMI_FIXED_INTF(0x05c6, 0x9025, 4)},	/* Alcatel-sbell ASB TL131 TDD LTE  (China Mobile) */
1099 	{QMI_FIXED_INTF(0x05c6, 0x9026, 3)},
1100 	{QMI_FIXED_INTF(0x05c6, 0x902e, 5)},
1101 	{QMI_FIXED_INTF(0x05c6, 0x9031, 5)},
1102 	{QMI_FIXED_INTF(0x05c6, 0x9032, 4)},
1103 	{QMI_FIXED_INTF(0x05c6, 0x9033, 3)},
1104 	{QMI_FIXED_INTF(0x05c6, 0x9033, 4)},
1105 	{QMI_FIXED_INTF(0x05c6, 0x9033, 5)},
1106 	{QMI_FIXED_INTF(0x05c6, 0x9033, 6)},
1107 	{QMI_FIXED_INTF(0x05c6, 0x9034, 3)},
1108 	{QMI_FIXED_INTF(0x05c6, 0x9034, 4)},
1109 	{QMI_FIXED_INTF(0x05c6, 0x9034, 5)},
1110 	{QMI_FIXED_INTF(0x05c6, 0x9034, 6)},
1111 	{QMI_FIXED_INTF(0x05c6, 0x9034, 7)},
1112 	{QMI_FIXED_INTF(0x05c6, 0x9035, 4)},
1113 	{QMI_FIXED_INTF(0x05c6, 0x9036, 3)},
1114 	{QMI_FIXED_INTF(0x05c6, 0x9037, 5)},
1115 	{QMI_FIXED_INTF(0x05c6, 0x9038, 4)},
1116 	{QMI_FIXED_INTF(0x05c6, 0x903b, 7)},
1117 	{QMI_FIXED_INTF(0x05c6, 0x903c, 6)},
1118 	{QMI_FIXED_INTF(0x05c6, 0x903d, 6)},
1119 	{QMI_FIXED_INTF(0x05c6, 0x903e, 5)},
1120 	{QMI_FIXED_INTF(0x05c6, 0x9043, 3)},
1121 	{QMI_FIXED_INTF(0x05c6, 0x9046, 3)},
1122 	{QMI_FIXED_INTF(0x05c6, 0x9046, 4)},
1123 	{QMI_FIXED_INTF(0x05c6, 0x9046, 5)},
1124 	{QMI_FIXED_INTF(0x05c6, 0x9047, 2)},
1125 	{QMI_FIXED_INTF(0x05c6, 0x9047, 3)},
1126 	{QMI_FIXED_INTF(0x05c6, 0x9047, 4)},
1127 	{QMI_FIXED_INTF(0x05c6, 0x9048, 4)},
1128 	{QMI_FIXED_INTF(0x05c6, 0x9048, 5)},
1129 	{QMI_FIXED_INTF(0x05c6, 0x9048, 6)},
1130 	{QMI_FIXED_INTF(0x05c6, 0x9048, 7)},
1131 	{QMI_FIXED_INTF(0x05c6, 0x9048, 8)},
1132 	{QMI_FIXED_INTF(0x05c6, 0x904c, 5)},
1133 	{QMI_FIXED_INTF(0x05c6, 0x904c, 6)},
1134 	{QMI_FIXED_INTF(0x05c6, 0x904c, 7)},
1135 	{QMI_FIXED_INTF(0x05c6, 0x904c, 8)},
1136 	{QMI_FIXED_INTF(0x05c6, 0x9050, 3)},
1137 	{QMI_FIXED_INTF(0x05c6, 0x9052, 4)},
1138 	{QMI_FIXED_INTF(0x05c6, 0x9053, 6)},
1139 	{QMI_FIXED_INTF(0x05c6, 0x9053, 7)},
1140 	{QMI_FIXED_INTF(0x05c6, 0x9054, 5)},
1141 	{QMI_FIXED_INTF(0x05c6, 0x9054, 6)},
1142 	{QMI_FIXED_INTF(0x05c6, 0x9055, 3)},
1143 	{QMI_FIXED_INTF(0x05c6, 0x9055, 4)},
1144 	{QMI_FIXED_INTF(0x05c6, 0x9055, 5)},
1145 	{QMI_FIXED_INTF(0x05c6, 0x9055, 6)},
1146 	{QMI_FIXED_INTF(0x05c6, 0x9055, 7)},
1147 	{QMI_FIXED_INTF(0x05c6, 0x9056, 3)},
1148 	{QMI_FIXED_INTF(0x05c6, 0x9062, 2)},
1149 	{QMI_FIXED_INTF(0x05c6, 0x9062, 3)},
1150 	{QMI_FIXED_INTF(0x05c6, 0x9062, 4)},
1151 	{QMI_FIXED_INTF(0x05c6, 0x9062, 5)},
1152 	{QMI_FIXED_INTF(0x05c6, 0x9062, 6)},
1153 	{QMI_FIXED_INTF(0x05c6, 0x9062, 7)},
1154 	{QMI_FIXED_INTF(0x05c6, 0x9062, 8)},
1155 	{QMI_FIXED_INTF(0x05c6, 0x9062, 9)},
1156 	{QMI_FIXED_INTF(0x05c6, 0x9064, 3)},
1157 	{QMI_FIXED_INTF(0x05c6, 0x9065, 6)},
1158 	{QMI_FIXED_INTF(0x05c6, 0x9065, 7)},
1159 	{QMI_FIXED_INTF(0x05c6, 0x9066, 5)},
1160 	{QMI_FIXED_INTF(0x05c6, 0x9066, 6)},
1161 	{QMI_FIXED_INTF(0x05c6, 0x9067, 1)},
1162 	{QMI_FIXED_INTF(0x05c6, 0x9068, 2)},
1163 	{QMI_FIXED_INTF(0x05c6, 0x9068, 3)},
1164 	{QMI_FIXED_INTF(0x05c6, 0x9068, 4)},
1165 	{QMI_FIXED_INTF(0x05c6, 0x9068, 5)},
1166 	{QMI_FIXED_INTF(0x05c6, 0x9068, 6)},
1167 	{QMI_FIXED_INTF(0x05c6, 0x9068, 7)},
1168 	{QMI_FIXED_INTF(0x05c6, 0x9069, 5)},
1169 	{QMI_FIXED_INTF(0x05c6, 0x9069, 6)},
1170 	{QMI_FIXED_INTF(0x05c6, 0x9069, 7)},
1171 	{QMI_FIXED_INTF(0x05c6, 0x9069, 8)},
1172 	{QMI_FIXED_INTF(0x05c6, 0x9070, 4)},
1173 	{QMI_FIXED_INTF(0x05c6, 0x9070, 5)},
1174 	{QMI_FIXED_INTF(0x05c6, 0x9075, 5)},
1175 	{QMI_FIXED_INTF(0x05c6, 0x9076, 4)},
1176 	{QMI_FIXED_INTF(0x05c6, 0x9076, 5)},
1177 	{QMI_FIXED_INTF(0x05c6, 0x9076, 6)},
1178 	{QMI_FIXED_INTF(0x05c6, 0x9076, 7)},
1179 	{QMI_FIXED_INTF(0x05c6, 0x9076, 8)},
1180 	{QMI_FIXED_INTF(0x05c6, 0x9077, 3)},
1181 	{QMI_FIXED_INTF(0x05c6, 0x9077, 4)},
1182 	{QMI_FIXED_INTF(0x05c6, 0x9077, 5)},
1183 	{QMI_FIXED_INTF(0x05c6, 0x9077, 6)},
1184 	{QMI_FIXED_INTF(0x05c6, 0x9078, 3)},
1185 	{QMI_FIXED_INTF(0x05c6, 0x9079, 4)},
1186 	{QMI_FIXED_INTF(0x05c6, 0x9079, 5)},
1187 	{QMI_FIXED_INTF(0x05c6, 0x9079, 6)},
1188 	{QMI_FIXED_INTF(0x05c6, 0x9079, 7)},
1189 	{QMI_FIXED_INTF(0x05c6, 0x9079, 8)},
1190 	{QMI_FIXED_INTF(0x05c6, 0x9080, 5)},
1191 	{QMI_FIXED_INTF(0x05c6, 0x9080, 6)},
1192 	{QMI_FIXED_INTF(0x05c6, 0x9080, 7)},
1193 	{QMI_FIXED_INTF(0x05c6, 0x9080, 8)},
1194 	{QMI_FIXED_INTF(0x05c6, 0x9083, 3)},
1195 	{QMI_FIXED_INTF(0x05c6, 0x9084, 4)},
1196 	{QMI_FIXED_INTF(0x05c6, 0x90b2, 3)},    /* ublox R410M */
1197 	{QMI_FIXED_INTF(0x05c6, 0x920d, 0)},
1198 	{QMI_FIXED_INTF(0x05c6, 0x920d, 5)},
1199 	{QMI_QUIRK_SET_DTR(0x05c6, 0x9625, 4)},	/* YUGA CLM920-NC5 */
1200 	{QMI_FIXED_INTF(0x0846, 0x68a2, 8)},
1201 	{QMI_FIXED_INTF(0x0846, 0x68d3, 8)},	/* Netgear Aircard 779S */
1202 	{QMI_FIXED_INTF(0x12d1, 0x140c, 1)},	/* Huawei E173 */
1203 	{QMI_FIXED_INTF(0x12d1, 0x14ac, 1)},	/* Huawei E1820 */
1204 	{QMI_FIXED_INTF(0x1435, 0x0918, 3)},	/* Wistron NeWeb D16Q1 */
1205 	{QMI_FIXED_INTF(0x1435, 0x0918, 4)},	/* Wistron NeWeb D16Q1 */
1206 	{QMI_FIXED_INTF(0x1435, 0x0918, 5)},	/* Wistron NeWeb D16Q1 */
1207 	{QMI_FIXED_INTF(0x1435, 0x3185, 4)},	/* Wistron NeWeb M18Q5 */
1208 	{QMI_FIXED_INTF(0x1435, 0xd111, 4)},	/* M9615A DM11-1 D51QC */
1209 	{QMI_FIXED_INTF(0x1435, 0xd181, 3)},	/* Wistron NeWeb D18Q1 */
1210 	{QMI_FIXED_INTF(0x1435, 0xd181, 4)},	/* Wistron NeWeb D18Q1 */
1211 	{QMI_FIXED_INTF(0x1435, 0xd181, 5)},	/* Wistron NeWeb D18Q1 */
1212 	{QMI_FIXED_INTF(0x1435, 0xd182, 4)},	/* Wistron NeWeb D18 */
1213 	{QMI_FIXED_INTF(0x1435, 0xd182, 5)},	/* Wistron NeWeb D18 */
1214 	{QMI_FIXED_INTF(0x1435, 0xd191, 4)},	/* Wistron NeWeb D19Q1 */
1215 	{QMI_QUIRK_SET_DTR(0x1508, 0x1001, 4)},	/* Fibocom NL668 series */
1216 	{QMI_FIXED_INTF(0x16d8, 0x6003, 0)},	/* CMOTech 6003 */
1217 	{QMI_FIXED_INTF(0x16d8, 0x6007, 0)},	/* CMOTech CHE-628S */
1218 	{QMI_FIXED_INTF(0x16d8, 0x6008, 0)},	/* CMOTech CMU-301 */
1219 	{QMI_FIXED_INTF(0x16d8, 0x6280, 0)},	/* CMOTech CHU-628 */
1220 	{QMI_FIXED_INTF(0x16d8, 0x7001, 0)},	/* CMOTech CHU-720S */
1221 	{QMI_FIXED_INTF(0x16d8, 0x7002, 0)},	/* CMOTech 7002 */
1222 	{QMI_FIXED_INTF(0x16d8, 0x7003, 4)},	/* CMOTech CHU-629K */
1223 	{QMI_FIXED_INTF(0x16d8, 0x7004, 3)},	/* CMOTech 7004 */
1224 	{QMI_FIXED_INTF(0x16d8, 0x7006, 5)},	/* CMOTech CGU-629 */
1225 	{QMI_FIXED_INTF(0x16d8, 0x700a, 4)},	/* CMOTech CHU-629S */
1226 	{QMI_FIXED_INTF(0x16d8, 0x7211, 0)},	/* CMOTech CHU-720I */
1227 	{QMI_FIXED_INTF(0x16d8, 0x7212, 0)},	/* CMOTech 7212 */
1228 	{QMI_FIXED_INTF(0x16d8, 0x7213, 0)},	/* CMOTech 7213 */
1229 	{QMI_FIXED_INTF(0x16d8, 0x7251, 1)},	/* CMOTech 7251 */
1230 	{QMI_FIXED_INTF(0x16d8, 0x7252, 1)},	/* CMOTech 7252 */
1231 	{QMI_FIXED_INTF(0x16d8, 0x7253, 1)},	/* CMOTech 7253 */
1232 	{QMI_FIXED_INTF(0x19d2, 0x0002, 1)},
1233 	{QMI_FIXED_INTF(0x19d2, 0x0012, 1)},
1234 	{QMI_FIXED_INTF(0x19d2, 0x0017, 3)},
1235 	{QMI_FIXED_INTF(0x19d2, 0x0019, 3)},	/* ONDA MT689DC */
1236 	{QMI_FIXED_INTF(0x19d2, 0x0021, 4)},
1237 	{QMI_FIXED_INTF(0x19d2, 0x0025, 1)},
1238 	{QMI_FIXED_INTF(0x19d2, 0x0031, 4)},
1239 	{QMI_FIXED_INTF(0x19d2, 0x0042, 4)},
1240 	{QMI_FIXED_INTF(0x19d2, 0x0049, 5)},
1241 	{QMI_FIXED_INTF(0x19d2, 0x0052, 4)},
1242 	{QMI_FIXED_INTF(0x19d2, 0x0055, 1)},	/* ZTE (Vodafone) K3520-Z */
1243 	{QMI_FIXED_INTF(0x19d2, 0x0058, 4)},
1244 	{QMI_FIXED_INTF(0x19d2, 0x0063, 4)},	/* ZTE (Vodafone) K3565-Z */
1245 	{QMI_FIXED_INTF(0x19d2, 0x0104, 4)},	/* ZTE (Vodafone) K4505-Z */
1246 	{QMI_FIXED_INTF(0x19d2, 0x0113, 5)},
1247 	{QMI_FIXED_INTF(0x19d2, 0x0118, 5)},
1248 	{QMI_FIXED_INTF(0x19d2, 0x0121, 5)},
1249 	{QMI_FIXED_INTF(0x19d2, 0x0123, 4)},
1250 	{QMI_FIXED_INTF(0x19d2, 0x0124, 5)},
1251 	{QMI_FIXED_INTF(0x19d2, 0x0125, 6)},
1252 	{QMI_FIXED_INTF(0x19d2, 0x0126, 5)},
1253 	{QMI_FIXED_INTF(0x19d2, 0x0130, 1)},
1254 	{QMI_FIXED_INTF(0x19d2, 0x0133, 3)},
1255 	{QMI_FIXED_INTF(0x19d2, 0x0141, 5)},
1256 	{QMI_FIXED_INTF(0x19d2, 0x0157, 5)},	/* ZTE MF683 */
1257 	{QMI_FIXED_INTF(0x19d2, 0x0158, 3)},
1258 	{QMI_FIXED_INTF(0x19d2, 0x0167, 4)},	/* ZTE MF820D */
1259 	{QMI_FIXED_INTF(0x19d2, 0x0168, 4)},
1260 	{QMI_FIXED_INTF(0x19d2, 0x0176, 3)},
1261 	{QMI_FIXED_INTF(0x19d2, 0x0178, 3)},
1262 	{QMI_FIXED_INTF(0x19d2, 0x0191, 4)},	/* ZTE EuFi890 */
1263 	{QMI_FIXED_INTF(0x19d2, 0x0199, 1)},	/* ZTE MF820S */
1264 	{QMI_FIXED_INTF(0x19d2, 0x0200, 1)},
1265 	{QMI_FIXED_INTF(0x19d2, 0x0257, 3)},	/* ZTE MF821 */
1266 	{QMI_FIXED_INTF(0x19d2, 0x0265, 4)},	/* ONDA MT8205 4G LTE */
1267 	{QMI_FIXED_INTF(0x19d2, 0x0284, 4)},	/* ZTE MF880 */
1268 	{QMI_FIXED_INTF(0x19d2, 0x0326, 4)},	/* ZTE MF821D */
1269 	{QMI_FIXED_INTF(0x19d2, 0x0396, 3)},	/* ZTE ZM8620 */
1270 	{QMI_FIXED_INTF(0x19d2, 0x0412, 4)},	/* Telewell TW-LTE 4G */
1271 	{QMI_FIXED_INTF(0x19d2, 0x1008, 4)},	/* ZTE (Vodafone) K3570-Z */
1272 	{QMI_FIXED_INTF(0x19d2, 0x1010, 4)},	/* ZTE (Vodafone) K3571-Z */
1273 	{QMI_FIXED_INTF(0x19d2, 0x1012, 4)},
1274 	{QMI_FIXED_INTF(0x19d2, 0x1018, 3)},	/* ZTE (Vodafone) K5006-Z */
1275 	{QMI_FIXED_INTF(0x19d2, 0x1021, 2)},
1276 	{QMI_FIXED_INTF(0x19d2, 0x1245, 4)},
1277 	{QMI_FIXED_INTF(0x19d2, 0x1247, 4)},
1278 	{QMI_FIXED_INTF(0x19d2, 0x1252, 4)},
1279 	{QMI_FIXED_INTF(0x19d2, 0x1254, 4)},
1280 	{QMI_FIXED_INTF(0x19d2, 0x1255, 3)},
1281 	{QMI_FIXED_INTF(0x19d2, 0x1255, 4)},
1282 	{QMI_FIXED_INTF(0x19d2, 0x1256, 4)},
1283 	{QMI_FIXED_INTF(0x19d2, 0x1270, 5)},	/* ZTE MF667 */
1284 	{QMI_FIXED_INTF(0x19d2, 0x1401, 2)},
1285 	{QMI_FIXED_INTF(0x19d2, 0x1402, 2)},	/* ZTE MF60 */
1286 	{QMI_FIXED_INTF(0x19d2, 0x1424, 2)},
1287 	{QMI_FIXED_INTF(0x19d2, 0x1425, 2)},
1288 	{QMI_FIXED_INTF(0x19d2, 0x1426, 2)},	/* ZTE MF91 */
1289 	{QMI_FIXED_INTF(0x19d2, 0x1428, 2)},	/* Telewell TW-LTE 4G v2 */
1290 	{QMI_FIXED_INTF(0x19d2, 0x1432, 3)},	/* ZTE ME3620 */
1291 	{QMI_FIXED_INTF(0x19d2, 0x2002, 4)},	/* ZTE (Vodafone) K3765-Z */
1292 	{QMI_FIXED_INTF(0x2001, 0x7e16, 3)},	/* D-Link DWM-221 */
1293 	{QMI_FIXED_INTF(0x2001, 0x7e19, 4)},	/* D-Link DWM-221 B1 */
1294 	{QMI_FIXED_INTF(0x2001, 0x7e35, 4)},	/* D-Link DWM-222 */
1295 	{QMI_FIXED_INTF(0x2001, 0x7e3d, 4)},	/* D-Link DWM-222 A2 */
1296 	{QMI_FIXED_INTF(0x2020, 0x2031, 4)},	/* Olicard 600 */
1297 	{QMI_FIXED_INTF(0x2020, 0x2033, 4)},	/* BroadMobi BM806U */
1298 	{QMI_FIXED_INTF(0x2020, 0x2060, 4)},	/* BroadMobi BM818 */
1299 	{QMI_FIXED_INTF(0x0f3d, 0x68a2, 8)},    /* Sierra Wireless MC7700 */
1300 	{QMI_FIXED_INTF(0x114f, 0x68a2, 8)},    /* Sierra Wireless MC7750 */
1301 	{QMI_FIXED_INTF(0x1199, 0x68a2, 8)},	/* Sierra Wireless MC7710 in QMI mode */
1302 	{QMI_FIXED_INTF(0x1199, 0x68a2, 19)},	/* Sierra Wireless MC7710 in QMI mode */
1303 	{QMI_QUIRK_SET_DTR(0x1199, 0x68c0, 8)},	/* Sierra Wireless MC7304/MC7354, WP76xx */
1304 	{QMI_QUIRK_SET_DTR(0x1199, 0x68c0, 10)},/* Sierra Wireless MC7304/MC7354 */
1305 	{QMI_FIXED_INTF(0x1199, 0x901c, 8)},    /* Sierra Wireless EM7700 */
1306 	{QMI_FIXED_INTF(0x1199, 0x901f, 8)},    /* Sierra Wireless EM7355 */
1307 	{QMI_FIXED_INTF(0x1199, 0x9041, 8)},	/* Sierra Wireless MC7305/MC7355 */
1308 	{QMI_FIXED_INTF(0x1199, 0x9041, 10)},	/* Sierra Wireless MC7305/MC7355 */
1309 	{QMI_FIXED_INTF(0x1199, 0x9051, 8)},	/* Netgear AirCard 340U */
1310 	{QMI_FIXED_INTF(0x1199, 0x9053, 8)},	/* Sierra Wireless Modem */
1311 	{QMI_FIXED_INTF(0x1199, 0x9054, 8)},	/* Sierra Wireless Modem */
1312 	{QMI_FIXED_INTF(0x1199, 0x9055, 8)},	/* Netgear AirCard 341U */
1313 	{QMI_FIXED_INTF(0x1199, 0x9056, 8)},	/* Sierra Wireless Modem */
1314 	{QMI_FIXED_INTF(0x1199, 0x9057, 8)},
1315 	{QMI_FIXED_INTF(0x1199, 0x9061, 8)},	/* Sierra Wireless Modem */
1316 	{QMI_FIXED_INTF(0x1199, 0x9063, 8)},	/* Sierra Wireless EM7305 */
1317 	{QMI_FIXED_INTF(0x1199, 0x9063, 10)},	/* Sierra Wireless EM7305 */
1318 	{QMI_QUIRK_SET_DTR(0x1199, 0x9071, 8)},	/* Sierra Wireless MC74xx */
1319 	{QMI_QUIRK_SET_DTR(0x1199, 0x9071, 10)},/* Sierra Wireless MC74xx */
1320 	{QMI_QUIRK_SET_DTR(0x1199, 0x9079, 8)},	/* Sierra Wireless EM74xx */
1321 	{QMI_QUIRK_SET_DTR(0x1199, 0x9079, 10)},/* Sierra Wireless EM74xx */
1322 	{QMI_QUIRK_SET_DTR(0x1199, 0x907b, 8)},	/* Sierra Wireless EM74xx */
1323 	{QMI_QUIRK_SET_DTR(0x1199, 0x907b, 10)},/* Sierra Wireless EM74xx */
1324 	{QMI_QUIRK_SET_DTR(0x1199, 0x9091, 8)},	/* Sierra Wireless EM7565 */
1325 	{QMI_FIXED_INTF(0x1bbb, 0x011e, 4)},	/* Telekom Speedstick LTE II (Alcatel One Touch L100V LTE) */
1326 	{QMI_FIXED_INTF(0x1bbb, 0x0203, 2)},	/* Alcatel L800MA */
1327 	{QMI_FIXED_INTF(0x2357, 0x0201, 4)},	/* TP-LINK HSUPA Modem MA180 */
1328 	{QMI_FIXED_INTF(0x2357, 0x9000, 4)},	/* TP-LINK MA260 */
1329 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1040, 2)},	/* Telit LE922A */
1330 	{QMI_FIXED_INTF(0x1bc7, 0x1100, 3)},	/* Telit ME910 */
1331 	{QMI_FIXED_INTF(0x1bc7, 0x1101, 3)},	/* Telit ME910 dual modem */
1332 	{QMI_FIXED_INTF(0x1bc7, 0x1200, 5)},	/* Telit LE920 */
1333 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1201, 2)},	/* Telit LE920, LE920A4 */
1334 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1260, 2)},	/* Telit LE910Cx */
1335 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1261, 2)},	/* Telit LE910Cx */
1336 	{QMI_QUIRK_SET_DTR(0x1bc7, 0x1900, 1)},	/* Telit LN940 series */
1337 	{QMI_FIXED_INTF(0x1c9e, 0x9801, 3)},	/* Telewell TW-3G HSPA+ */
1338 	{QMI_FIXED_INTF(0x1c9e, 0x9803, 4)},	/* Telewell TW-3G HSPA+ */
1339 	{QMI_FIXED_INTF(0x1c9e, 0x9b01, 3)},	/* XS Stick W100-2 from 4G Systems */
1340 	{QMI_FIXED_INTF(0x0b3c, 0xc000, 4)},	/* Olivetti Olicard 100 */
1341 	{QMI_FIXED_INTF(0x0b3c, 0xc001, 4)},	/* Olivetti Olicard 120 */
1342 	{QMI_FIXED_INTF(0x0b3c, 0xc002, 4)},	/* Olivetti Olicard 140 */
1343 	{QMI_FIXED_INTF(0x0b3c, 0xc004, 6)},	/* Olivetti Olicard 155 */
1344 	{QMI_FIXED_INTF(0x0b3c, 0xc005, 6)},	/* Olivetti Olicard 200 */
1345 	{QMI_FIXED_INTF(0x0b3c, 0xc00a, 6)},	/* Olivetti Olicard 160 */
1346 	{QMI_FIXED_INTF(0x0b3c, 0xc00b, 4)},	/* Olivetti Olicard 500 */
1347 	{QMI_FIXED_INTF(0x1e2d, 0x0060, 4)},	/* Cinterion PLxx */
1348 	{QMI_FIXED_INTF(0x1e2d, 0x0053, 4)},	/* Cinterion PHxx,PXxx */
1349 	{QMI_FIXED_INTF(0x1e2d, 0x0063, 10)},	/* Cinterion ALASxx (1 RmNet) */
1350 	{QMI_FIXED_INTF(0x1e2d, 0x0082, 4)},	/* Cinterion PHxx,PXxx (2 RmNet) */
1351 	{QMI_FIXED_INTF(0x1e2d, 0x0082, 5)},	/* Cinterion PHxx,PXxx (2 RmNet) */
1352 	{QMI_FIXED_INTF(0x1e2d, 0x0083, 4)},	/* Cinterion PHxx,PXxx (1 RmNet + USB Audio)*/
1353 	{QMI_QUIRK_SET_DTR(0x1e2d, 0x00b0, 4)},	/* Cinterion CLS8 */
1354 	{QMI_FIXED_INTF(0x413c, 0x81a2, 8)},	/* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
1355 	{QMI_FIXED_INTF(0x413c, 0x81a3, 8)},	/* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
1356 	{QMI_FIXED_INTF(0x413c, 0x81a4, 8)},	/* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
1357 	{QMI_FIXED_INTF(0x413c, 0x81a8, 8)},	/* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
1358 	{QMI_FIXED_INTF(0x413c, 0x81a9, 8)},	/* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
1359 	{QMI_FIXED_INTF(0x413c, 0x81b1, 8)},	/* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card */
1360 	{QMI_FIXED_INTF(0x413c, 0x81b3, 8)},	/* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card (rev3) */
1361 	{QMI_FIXED_INTF(0x413c, 0x81b6, 8)},	/* Dell Wireless 5811e */
1362 	{QMI_FIXED_INTF(0x413c, 0x81b6, 10)},	/* Dell Wireless 5811e */
1363 	{QMI_FIXED_INTF(0x413c, 0x81d7, 0)},	/* Dell Wireless 5821e */
1364 	{QMI_FIXED_INTF(0x03f0, 0x4e1d, 8)},	/* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */
1365 	{QMI_FIXED_INTF(0x03f0, 0x9d1d, 1)},	/* HP lt4120 Snapdragon X5 LTE */
1366 	{QMI_FIXED_INTF(0x22de, 0x9061, 3)},	/* WeTelecom WPD-600N */
1367 	{QMI_QUIRK_SET_DTR(0x1e0e, 0x9001, 5)},	/* SIMCom 7100E, 7230E, 7600E ++ */
1368 	{QMI_QUIRK_SET_DTR(0x2c7c, 0x0121, 4)},	/* Quectel EC21 Mini PCIe */
1369 	{QMI_QUIRK_SET_DTR(0x2c7c, 0x0191, 4)},	/* Quectel EG91 */
1370 	{QMI_FIXED_INTF(0x2c7c, 0x0296, 4)},	/* Quectel BG96 */
1371 	{QMI_QUIRK_SET_DTR(0x2cb7, 0x0104, 4)},	/* Fibocom NL678 series */
1372 
1373 	/* 4. Gobi 1000 devices */
1374 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9212)},	/* Acer Gobi Modem Device */
1375 	{QMI_GOBI1K_DEVICE(0x03f0, 0x1f1d)},	/* HP un2400 Gobi Modem Device */
1376 	{QMI_GOBI1K_DEVICE(0x04da, 0x250d)},	/* Panasonic Gobi Modem device */
1377 	{QMI_GOBI1K_DEVICE(0x413c, 0x8172)},	/* Dell Gobi Modem device */
1378 	{QMI_GOBI1K_DEVICE(0x1410, 0xa001)},	/* Novatel/Verizon USB-1000 */
1379 	{QMI_GOBI1K_DEVICE(0x1410, 0xa002)},	/* Novatel Gobi Modem device */
1380 	{QMI_GOBI1K_DEVICE(0x1410, 0xa003)},	/* Novatel Gobi Modem device */
1381 	{QMI_GOBI1K_DEVICE(0x1410, 0xa004)},	/* Novatel Gobi Modem device */
1382 	{QMI_GOBI1K_DEVICE(0x1410, 0xa005)},	/* Novatel Gobi Modem device */
1383 	{QMI_GOBI1K_DEVICE(0x1410, 0xa006)},	/* Novatel Gobi Modem device */
1384 	{QMI_GOBI1K_DEVICE(0x1410, 0xa007)},	/* Novatel Gobi Modem device */
1385 	{QMI_GOBI1K_DEVICE(0x0b05, 0x1776)},	/* Asus Gobi Modem device */
1386 	{QMI_GOBI1K_DEVICE(0x19d2, 0xfff3)},	/* ONDA Gobi Modem device */
1387 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9001)},	/* Generic Gobi Modem device */
1388 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9002)},	/* Generic Gobi Modem device */
1389 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9202)},	/* Generic Gobi Modem device */
1390 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9203)},	/* Generic Gobi Modem device */
1391 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9222)},	/* Generic Gobi Modem device */
1392 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9009)},	/* Generic Gobi Modem device */
1393 
1394 	/* 5. Gobi 2000 and 3000 devices */
1395 	{QMI_GOBI_DEVICE(0x413c, 0x8186)},	/* Dell Gobi 2000 Modem device (N0218, VU936) */
1396 	{QMI_GOBI_DEVICE(0x413c, 0x8194)},	/* Dell Gobi 3000 Composite */
1397 	{QMI_GOBI_DEVICE(0x05c6, 0x920b)},	/* Generic Gobi 2000 Modem device */
1398 	{QMI_GOBI_DEVICE(0x05c6, 0x9225)},	/* Sony Gobi 2000 Modem device (N0279, VU730) */
1399 	{QMI_GOBI_DEVICE(0x05c6, 0x9245)},	/* Samsung Gobi 2000 Modem device (VL176) */
1400 	{QMI_GOBI_DEVICE(0x03f0, 0x251d)},	/* HP Gobi 2000 Modem device (VP412) */
1401 	{QMI_GOBI_DEVICE(0x05c6, 0x9215)},	/* Acer Gobi 2000 Modem device (VP413) */
1402 	{QMI_FIXED_INTF(0x05c6, 0x9215, 4)},	/* Quectel EC20 Mini PCIe */
1403 	{QMI_GOBI_DEVICE(0x05c6, 0x9265)},	/* Asus Gobi 2000 Modem device (VR305) */
1404 	{QMI_GOBI_DEVICE(0x05c6, 0x9235)},	/* Top Global Gobi 2000 Modem device (VR306) */
1405 	{QMI_GOBI_DEVICE(0x05c6, 0x9275)},	/* iRex Technologies Gobi 2000 Modem device (VR307) */
1406 	{QMI_GOBI_DEVICE(0x0af0, 0x8120)},	/* Option GTM681W */
1407 	{QMI_GOBI_DEVICE(0x1199, 0x68a5)},	/* Sierra Wireless Modem */
1408 	{QMI_GOBI_DEVICE(0x1199, 0x68a9)},	/* Sierra Wireless Modem */
1409 	{QMI_GOBI_DEVICE(0x1199, 0x9001)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1410 	{QMI_GOBI_DEVICE(0x1199, 0x9002)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1411 	{QMI_GOBI_DEVICE(0x1199, 0x9003)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1412 	{QMI_GOBI_DEVICE(0x1199, 0x9004)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1413 	{QMI_GOBI_DEVICE(0x1199, 0x9005)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1414 	{QMI_GOBI_DEVICE(0x1199, 0x9006)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1415 	{QMI_GOBI_DEVICE(0x1199, 0x9007)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1416 	{QMI_GOBI_DEVICE(0x1199, 0x9008)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1417 	{QMI_GOBI_DEVICE(0x1199, 0x9009)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1418 	{QMI_GOBI_DEVICE(0x1199, 0x900a)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
1419 	{QMI_GOBI_DEVICE(0x1199, 0x9011)},	/* Sierra Wireless Gobi 2000 Modem device (MC8305) */
1420 	{QMI_GOBI_DEVICE(0x16d8, 0x8002)},	/* CMDTech Gobi 2000 Modem device (VU922) */
1421 	{QMI_GOBI_DEVICE(0x05c6, 0x9205)},	/* Gobi 2000 Modem device */
1422 	{QMI_GOBI_DEVICE(0x1199, 0x9013)},	/* Sierra Wireless Gobi 3000 Modem device (MC8355) */
1423 	{QMI_GOBI_DEVICE(0x03f0, 0x371d)},	/* HP un2430 Mobile Broadband Module */
1424 	{QMI_GOBI_DEVICE(0x1199, 0x9015)},	/* Sierra Wireless Gobi 3000 Modem device */
1425 	{QMI_GOBI_DEVICE(0x1199, 0x9019)},	/* Sierra Wireless Gobi 3000 Modem device */
1426 	{QMI_GOBI_DEVICE(0x1199, 0x901b)},	/* Sierra Wireless MC7770 */
1427 	{QMI_GOBI_DEVICE(0x12d1, 0x14f1)},	/* Sony Gobi 3000 Composite */
1428 	{QMI_GOBI_DEVICE(0x1410, 0xa021)},	/* Foxconn Gobi 3000 Modem device (Novatel E396) */
1429 
1430 	{ }					/* END */
1431 };
1432 MODULE_DEVICE_TABLE(usb, products);
1433 
1434 static bool quectel_ec20_detected(struct usb_interface *intf)
1435 {
1436 	struct usb_device *dev = interface_to_usbdev(intf);
1437 
1438 	if (dev->actconfig &&
1439 	    le16_to_cpu(dev->descriptor.idVendor) == 0x05c6 &&
1440 	    le16_to_cpu(dev->descriptor.idProduct) == 0x9215 &&
1441 	    dev->actconfig->desc.bNumInterfaces == 5)
1442 		return true;
1443 
1444 	return false;
1445 }
1446 
1447 static int qmi_wwan_probe(struct usb_interface *intf,
1448 			  const struct usb_device_id *prod)
1449 {
1450 	struct usb_device_id *id = (struct usb_device_id *)prod;
1451 	struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
1452 	const struct driver_info *info;
1453 
1454 	/* Workaround to enable dynamic IDs.  This disables usbnet
1455 	 * blacklisting functionality.  Which, if required, can be
1456 	 * reimplemented here by using a magic "blacklist" value
1457 	 * instead of 0 in the static device id table
1458 	 */
1459 	if (!id->driver_info) {
1460 		dev_dbg(&intf->dev, "setting defaults for dynamic device id\n");
1461 		id->driver_info = (unsigned long)&qmi_wwan_info;
1462 	}
1463 
1464 	/* There are devices where the same interface number can be
1465 	 * configured as different functions. We should only bind to
1466 	 * vendor specific functions when matching on interface number
1467 	 */
1468 	if (id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER &&
1469 	    desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) {
1470 		dev_dbg(&intf->dev,
1471 			"Rejecting interface number match for class %02x\n",
1472 			desc->bInterfaceClass);
1473 		return -ENODEV;
1474 	}
1475 
1476 	/* Quectel EC20 quirk where we've QMI on interface 4 instead of 0 */
1477 	if (quectel_ec20_detected(intf) && desc->bInterfaceNumber == 0) {
1478 		dev_dbg(&intf->dev, "Quectel EC20 quirk, skipping interface 0\n");
1479 		return -ENODEV;
1480 	}
1481 
1482 	/* Several Quectel modems supports dynamic interface configuration, so
1483 	 * we need to match on class/subclass/protocol. These values are
1484 	 * identical for the diagnostic- and QMI-interface, but bNumEndpoints is
1485 	 * different. Ignore the current interface if the number of endpoints
1486 	 * equals the number for the diag interface (two).
1487 	 */
1488 	info = (void *)id->driver_info;
1489 
1490 	if (info->data & QMI_WWAN_QUIRK_QUECTEL_DYNCFG) {
1491 		if (desc->bNumEndpoints == 2)
1492 			return -ENODEV;
1493 	}
1494 
1495 	return usbnet_probe(intf, id);
1496 }
1497 
1498 static void qmi_wwan_disconnect(struct usb_interface *intf)
1499 {
1500 	struct usbnet *dev = usb_get_intfdata(intf);
1501 	struct qmi_wwan_state *info;
1502 	struct list_head *iter;
1503 	struct net_device *ldev;
1504 	LIST_HEAD(list);
1505 
1506 	/* called twice if separate control and data intf */
1507 	if (!dev)
1508 		return;
1509 	info = (void *)&dev->data;
1510 	if (info->flags & QMI_WWAN_FLAG_MUX) {
1511 		if (!rtnl_trylock()) {
1512 			restart_syscall();
1513 			return;
1514 		}
1515 		rcu_read_lock();
1516 		netdev_for_each_upper_dev_rcu(dev->net, ldev, iter)
1517 			qmimux_unregister_device(ldev, &list);
1518 		rcu_read_unlock();
1519 		unregister_netdevice_many(&list);
1520 		rtnl_unlock();
1521 		info->flags &= ~QMI_WWAN_FLAG_MUX;
1522 	}
1523 	usbnet_disconnect(intf);
1524 }
1525 
1526 static struct usb_driver qmi_wwan_driver = {
1527 	.name		      = "qmi_wwan",
1528 	.id_table	      = products,
1529 	.probe		      = qmi_wwan_probe,
1530 	.disconnect	      = qmi_wwan_disconnect,
1531 	.suspend	      = qmi_wwan_suspend,
1532 	.resume		      =	qmi_wwan_resume,
1533 	.reset_resume         = qmi_wwan_resume,
1534 	.supports_autosuspend = 1,
1535 	.disable_hub_initiated_lpm = 1,
1536 };
1537 
1538 module_usb_driver(qmi_wwan_driver);
1539 
1540 MODULE_AUTHOR("Bjørn Mork <bjorn@mork.no>");
1541 MODULE_DESCRIPTION("Qualcomm MSM Interface (QMI) WWAN driver");
1542 MODULE_LICENSE("GPL");
1543