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28#define DRIVER_VERSION "v.2.0"
29#define DRIVER_AUTHOR "Paxton Smith, Matthew Safar, Rory Filer"
30#define DRIVER_DESC "USB-to-WWAN Driver for Sierra Wireless modems"
31static const char driver_name[] = "sierra_net";
32
33
34
35
36#include <linux/module.h>
37#include <linux/etherdevice.h>
38#include <linux/ethtool.h>
39#include <linux/mii.h>
40#include <linux/sched.h>
41#include <linux/timer.h>
42#include <linux/usb.h>
43#include <linux/usb/cdc.h>
44#include <net/ip.h>
45#include <net/udp.h>
46#include <asm/unaligned.h>
47#include <linux/usb/usbnet.h>
48
49#define SWI_USB_REQUEST_GET_FW_ATTR 0x06
50#define SWI_GET_FW_ATTR_MASK 0x08
51
52
53
54
55static atomic_t iface_counter = ATOMIC_INIT(0);
56
57
58
59
60#define SIERRA_NET_SYNCDELAY (2*HZ)
61
62
63#define SIERRA_NET_MAX_SUPPORTED_MTU 1500
64
65
66
67
68
69#define SIERRA_NET_USBCTL_BUF_LEN 1024
70
71
72#define SIERRA_NET_RX_URB_SIZE (8 * 1024)
73
74
75struct sierra_net_data {
76
77 u8 ethr_hdr_tmpl[ETH_HLEN];
78
79 u16 link_up;
80 u8 tx_hdr_template[4];
81
82 u8 sync_msg[4];
83 u8 shdwn_msg[4];
84
85
86 struct usbnet *usbnet;
87
88 u8 ifnum;
89
90
91#define SIERRA_NET_EVENT_RESP_AVAIL 0x01
92#define SIERRA_NET_TIMER_EXPIRY 0x02
93 unsigned long kevent_flags;
94 struct work_struct sierra_net_kevent;
95 struct timer_list sync_timer;
96};
97
98struct param {
99 int is_present;
100 union {
101 void *ptr;
102 u32 dword;
103 u16 word;
104 u8 byte;
105 };
106};
107
108
109#define SIERRA_NET_HIP_EXTENDEDID 0x7F
110#define SIERRA_NET_HIP_HSYNC_ID 0x60
111#define SIERRA_NET_HIP_RESTART_ID 0x62
112#define SIERRA_NET_HIP_MSYNC_ID 0x20
113#define SIERRA_NET_HIP_SHUTD_ID 0x26
114
115#define SIERRA_NET_HIP_EXT_IP_IN_ID 0x0202
116#define SIERRA_NET_HIP_EXT_IP_OUT_ID 0x0002
117
118
119#define SIERRA_NET_HIP_LSI_UMTSID 0x78
120
121
122#define SIERRA_NET_HIP_RCGI 0x64
123
124
125#define SIERRA_NET_PROTOCOL_UMTS 0x01
126
127#define SIERRA_NET_COVERAGE_NONE 0x00
128#define SIERRA_NET_COVERAGE_NOPACKET 0x01
129
130
131#define SIERRA_NET_SESSION_IDLE 0x00
132
133#define SIERRA_NET_AS_LINK_TYPE_IPv4 0x00
134
135struct lsi_umts {
136 u8 protocol;
137 u8 unused1;
138 __be16 length;
139
140 u8 coverage;
141 u8 unused2[41];
142 u8 session_state;
143 u8 unused3[33];
144 u8 link_type;
145 u8 pdp_addr_len;
146 u8 pdp_addr[16];
147 u8 unused4[23];
148 u8 dns1_addr_len;
149 u8 dns1_addr[16];
150 u8 dns2_addr_len;
151 u8 dns2_addr[16];
152 u8 wins1_addr_len;
153 u8 wins1_addr[16];
154 u8 wins2_addr_len;
155 u8 wins2_addr[16];
156 u8 unused5[4];
157 u8 gw_addr_len;
158 u8 gw_addr[16];
159 u8 reserved[8];
160} __packed;
161
162#define SIERRA_NET_LSI_COMMON_LEN 4
163#define SIERRA_NET_LSI_UMTS_LEN (sizeof(struct lsi_umts))
164#define SIERRA_NET_LSI_UMTS_STATUS_LEN \
165 (SIERRA_NET_LSI_UMTS_LEN - SIERRA_NET_LSI_COMMON_LEN)
166
167
168static void sierra_sync_timer(unsigned long syncdata);
169static int sierra_net_change_mtu(struct net_device *net, int new_mtu);
170
171
172static const struct net_device_ops sierra_net_device_ops = {
173 .ndo_open = usbnet_open,
174 .ndo_stop = usbnet_stop,
175 .ndo_start_xmit = usbnet_start_xmit,
176 .ndo_tx_timeout = usbnet_tx_timeout,
177 .ndo_change_mtu = sierra_net_change_mtu,
178 .ndo_set_mac_address = eth_mac_addr,
179 .ndo_validate_addr = eth_validate_addr,
180};
181
182
183static inline struct sierra_net_data *sierra_net_get_private(struct usbnet *dev)
184{
185 return (struct sierra_net_data *)dev->data[0];
186}
187
188
189static inline void sierra_net_set_private(struct usbnet *dev,
190 struct sierra_net_data *priv)
191{
192 dev->data[0] = (unsigned long)priv;
193}
194
195
196static inline int is_ip(struct sk_buff *skb)
197{
198 return skb->protocol == cpu_to_be16(ETH_P_IP);
199}
200
201
202
203
204
205
206static int check_ethip_packet(struct sk_buff *skb, struct usbnet *dev)
207{
208 skb_reset_mac_header(skb);
209
210 if (skb_is_nonlinear(skb)) {
211 netdev_err(dev->net, "Non linear buffer-dropping\n");
212 return 0;
213 }
214
215 if (!pskb_may_pull(skb, ETH_HLEN))
216 return 0;
217 skb->protocol = eth_hdr(skb)->h_proto;
218
219 return 1;
220}
221
222static const u8 *save16bit(struct param *p, const u8 *datap)
223{
224 p->is_present = 1;
225 p->word = get_unaligned_be16(datap);
226 return datap + sizeof(p->word);
227}
228
229static const u8 *save8bit(struct param *p, const u8 *datap)
230{
231 p->is_present = 1;
232 p->byte = *datap;
233 return datap + sizeof(p->byte);
234}
235
236
237
238
239
240#define SIERRA_NET_HIP_HDR_LEN 4
241
242#define SIERRA_NET_HIP_EXT_HDR_LEN 6
243
244struct hip_hdr {
245 int hdrlen;
246 struct param payload_len;
247 struct param msgid;
248 struct param msgspecific;
249 struct param extmsgid;
250};
251
252static int parse_hip(const u8 *buf, const u32 buflen, struct hip_hdr *hh)
253{
254 const u8 *curp = buf;
255 int padded;
256
257 if (buflen < SIERRA_NET_HIP_HDR_LEN)
258 return -EPROTO;
259
260 curp = save16bit(&hh->payload_len, curp);
261 curp = save8bit(&hh->msgid, curp);
262 curp = save8bit(&hh->msgspecific, curp);
263
264 padded = hh->msgid.byte & 0x80;
265 hh->msgid.byte &= 0x7F;
266
267 hh->extmsgid.is_present = (hh->msgid.byte == SIERRA_NET_HIP_EXTENDEDID);
268 if (hh->extmsgid.is_present) {
269 if (buflen < SIERRA_NET_HIP_EXT_HDR_LEN)
270 return -EPROTO;
271
272 hh->payload_len.word &= 0x3FFF;
273
274 curp = save16bit(&hh->extmsgid, curp);
275 hh->extmsgid.word &= 0x03FF;
276
277 hh->hdrlen = SIERRA_NET_HIP_EXT_HDR_LEN;
278 } else {
279 hh->payload_len.word &= 0x07FF;
280 hh->hdrlen = SIERRA_NET_HIP_HDR_LEN;
281 }
282
283 if (padded) {
284 hh->hdrlen++;
285 hh->payload_len.word--;
286 }
287
288
289 if (buflen < (hh->hdrlen + hh->payload_len.word))
290 return -EINVAL;
291
292 return 0;
293}
294
295static void build_hip(u8 *buf, const u16 payloadlen,
296 struct sierra_net_data *priv)
297{
298
299
300
301 put_unaligned_be16(payloadlen, buf);
302 memcpy(buf+2, priv->tx_hdr_template, sizeof(priv->tx_hdr_template));
303}
304
305
306
307
308static int sierra_net_send_cmd(struct usbnet *dev,
309 u8 *cmd, int cmdlen, const char * cmd_name)
310{
311 struct sierra_net_data *priv = sierra_net_get_private(dev);
312 int status;
313
314 status = usbnet_write_cmd(dev, USB_CDC_SEND_ENCAPSULATED_COMMAND,
315 USB_DIR_OUT|USB_TYPE_CLASS|USB_RECIP_INTERFACE,
316 0, priv->ifnum, cmd, cmdlen);
317
318 if (status != cmdlen && status != -ENODEV)
319 netdev_err(dev->net, "Submit %s failed %d\n", cmd_name, status);
320
321 return status;
322}
323
324static int sierra_net_send_sync(struct usbnet *dev)
325{
326 int status;
327 struct sierra_net_data *priv = sierra_net_get_private(dev);
328
329 dev_dbg(&dev->udev->dev, "%s", __func__);
330
331 status = sierra_net_send_cmd(dev, priv->sync_msg,
332 sizeof(priv->sync_msg), "SYNC");
333
334 return status;
335}
336
337static void sierra_net_set_ctx_index(struct sierra_net_data *priv, u8 ctx_ix)
338{
339 dev_dbg(&(priv->usbnet->udev->dev), "%s %d", __func__, ctx_ix);
340 priv->tx_hdr_template[0] = 0x3F;
341 priv->tx_hdr_template[1] = ctx_ix;
342 *((__be16 *)&priv->tx_hdr_template[2]) =
343 cpu_to_be16(SIERRA_NET_HIP_EXT_IP_OUT_ID);
344}
345
346static inline int sierra_net_is_valid_addrlen(u8 len)
347{
348 return len == sizeof(struct in_addr);
349}
350
351static int sierra_net_parse_lsi(struct usbnet *dev, char *data, int datalen)
352{
353 struct lsi_umts *lsi = (struct lsi_umts *)data;
354
355 if (datalen < sizeof(struct lsi_umts)) {
356 netdev_err(dev->net, "%s: Data length %d, exp %Zu\n",
357 __func__, datalen,
358 sizeof(struct lsi_umts));
359 return -1;
360 }
361
362 if (lsi->length != cpu_to_be16(SIERRA_NET_LSI_UMTS_STATUS_LEN)) {
363 netdev_err(dev->net, "%s: LSI_UMTS_STATUS_LEN %d, exp %u\n",
364 __func__, be16_to_cpu(lsi->length),
365 (u32)SIERRA_NET_LSI_UMTS_STATUS_LEN);
366 return -1;
367 }
368
369
370 if (lsi->protocol != SIERRA_NET_PROTOCOL_UMTS) {
371 netdev_err(dev->net, "Protocol unsupported, 0x%02x\n",
372 lsi->protocol);
373 return -1;
374 }
375
376
377 if (lsi->link_type != SIERRA_NET_AS_LINK_TYPE_IPv4) {
378 netdev_err(dev->net, "Link type unsupported: 0x%02x\n",
379 lsi->link_type);
380 return -1;
381 }
382
383
384 if (lsi->coverage == SIERRA_NET_COVERAGE_NONE
385 || lsi->coverage == SIERRA_NET_COVERAGE_NOPACKET) {
386 netdev_err(dev->net, "No coverage, 0x%02x\n", lsi->coverage);
387 return 0;
388 }
389
390
391 if (lsi->session_state == SIERRA_NET_SESSION_IDLE) {
392 netdev_err(dev->net, "Session idle, 0x%02x\n",
393 lsi->session_state);
394 return 0;
395 }
396
397
398 return 1;
399}
400
401static void sierra_net_handle_lsi(struct usbnet *dev, char *data,
402 struct hip_hdr *hh)
403{
404 struct sierra_net_data *priv = sierra_net_get_private(dev);
405 int link_up;
406
407 link_up = sierra_net_parse_lsi(dev, data + hh->hdrlen,
408 hh->payload_len.word);
409 if (link_up < 0) {
410 netdev_err(dev->net, "Invalid LSI\n");
411 return;
412 }
413 if (link_up) {
414 sierra_net_set_ctx_index(priv, hh->msgspecific.byte);
415 priv->link_up = 1;
416 } else {
417 priv->link_up = 0;
418 }
419 usbnet_link_change(dev, link_up, 0);
420}
421
422static void sierra_net_dosync(struct usbnet *dev)
423{
424 int status;
425 struct sierra_net_data *priv = sierra_net_get_private(dev);
426
427 dev_dbg(&dev->udev->dev, "%s", __func__);
428
429
430
431
432
433
434
435
436
437 status = sierra_net_send_sync(dev);
438 if (status < 0)
439 netdev_err(dev->net,
440 "Send SYNC failed, status %d\n", status);
441 status = sierra_net_send_sync(dev);
442 if (status < 0)
443 netdev_err(dev->net,
444 "Send SYNC failed, status %d\n", status);
445
446
447 priv->sync_timer.function = sierra_sync_timer;
448 priv->sync_timer.data = (unsigned long) dev;
449 priv->sync_timer.expires = jiffies + SIERRA_NET_SYNCDELAY;
450 add_timer(&priv->sync_timer);
451}
452
453static void sierra_net_kevent(struct work_struct *work)
454{
455 struct sierra_net_data *priv =
456 container_of(work, struct sierra_net_data, sierra_net_kevent);
457 struct usbnet *dev = priv->usbnet;
458 int len;
459 int err;
460 u8 *buf;
461 u8 ifnum;
462
463 if (test_bit(SIERRA_NET_EVENT_RESP_AVAIL, &priv->kevent_flags)) {
464 clear_bit(SIERRA_NET_EVENT_RESP_AVAIL, &priv->kevent_flags);
465
466
467 buf = kzalloc(SIERRA_NET_USBCTL_BUF_LEN, GFP_KERNEL);
468 if (!buf)
469 return;
470
471 ifnum = priv->ifnum;
472 len = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
473 USB_CDC_GET_ENCAPSULATED_RESPONSE,
474 USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE,
475 0, ifnum, buf, SIERRA_NET_USBCTL_BUF_LEN,
476 USB_CTRL_SET_TIMEOUT);
477
478 if (len < 0) {
479 netdev_err(dev->net,
480 "usb_control_msg failed, status %d\n", len);
481 } else {
482 struct hip_hdr hh;
483
484 dev_dbg(&dev->udev->dev, "%s: Received status message,"
485 " %04x bytes", __func__, len);
486
487 err = parse_hip(buf, len, &hh);
488 if (err) {
489 netdev_err(dev->net, "%s: Bad packet,"
490 " parse result %d\n", __func__, err);
491 kfree(buf);
492 return;
493 }
494
495
496 if (len != hh.hdrlen + hh.payload_len.word) {
497 netdev_err(dev->net, "%s: Bad packet, received"
498 " %d, expected %d\n", __func__, len,
499 hh.hdrlen + hh.payload_len.word);
500 kfree(buf);
501 return;
502 }
503
504
505 switch (hh.msgid.byte) {
506 case SIERRA_NET_HIP_LSI_UMTSID:
507 dev_dbg(&dev->udev->dev, "LSI for ctx:%d",
508 hh.msgspecific.byte);
509 sierra_net_handle_lsi(dev, buf, &hh);
510 break;
511 case SIERRA_NET_HIP_RESTART_ID:
512 dev_dbg(&dev->udev->dev, "Restart reported: %d,"
513 " stopping sync timer",
514 hh.msgspecific.byte);
515
516 del_timer_sync(&priv->sync_timer);
517 clear_bit(SIERRA_NET_TIMER_EXPIRY,
518 &priv->kevent_flags);
519 break;
520 case SIERRA_NET_HIP_HSYNC_ID:
521 dev_dbg(&dev->udev->dev, "SYNC received");
522 err = sierra_net_send_sync(dev);
523 if (err < 0)
524 netdev_err(dev->net,
525 "Send SYNC failed %d\n", err);
526 break;
527 case SIERRA_NET_HIP_EXTENDEDID:
528 netdev_err(dev->net, "Unrecognized HIP msg, "
529 "extmsgid 0x%04x\n", hh.extmsgid.word);
530 break;
531 case SIERRA_NET_HIP_RCGI:
532
533 break;
534 default:
535 netdev_err(dev->net, "Unrecognized HIP msg, "
536 "msgid 0x%02x\n", hh.msgid.byte);
537 break;
538 }
539 }
540 kfree(buf);
541 }
542
543 if (test_bit(SIERRA_NET_TIMER_EXPIRY, &priv->kevent_flags)) {
544 clear_bit(SIERRA_NET_TIMER_EXPIRY, &priv->kevent_flags);
545 dev_dbg(&dev->udev->dev, "Deferred sync timer expiry");
546 sierra_net_dosync(priv->usbnet);
547 }
548
549 if (priv->kevent_flags)
550 dev_dbg(&dev->udev->dev, "sierra_net_kevent done, "
551 "kevent_flags = 0x%lx", priv->kevent_flags);
552}
553
554static void sierra_net_defer_kevent(struct usbnet *dev, int work)
555{
556 struct sierra_net_data *priv = sierra_net_get_private(dev);
557
558 set_bit(work, &priv->kevent_flags);
559 schedule_work(&priv->sierra_net_kevent);
560}
561
562
563
564
565static void sierra_sync_timer(unsigned long syncdata)
566{
567 struct usbnet *dev = (struct usbnet *)syncdata;
568
569 dev_dbg(&dev->udev->dev, "%s", __func__);
570
571 sierra_net_defer_kevent(dev, SIERRA_NET_TIMER_EXPIRY);
572}
573
574static void sierra_net_status(struct usbnet *dev, struct urb *urb)
575{
576 struct usb_cdc_notification *event;
577
578 dev_dbg(&dev->udev->dev, "%s", __func__);
579
580 if (urb->actual_length < sizeof *event)
581 return;
582
583
584 event = urb->transfer_buffer;
585 switch (event->bNotificationType) {
586 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
587 case USB_CDC_NOTIFY_SPEED_CHANGE:
588
589 break;
590 case USB_CDC_NOTIFY_RESPONSE_AVAILABLE:
591 sierra_net_defer_kevent(dev, SIERRA_NET_EVENT_RESP_AVAIL);
592 break;
593 default:
594 netdev_err(dev->net, ": unexpected notification %02x!\n",
595 event->bNotificationType);
596 break;
597 }
598}
599
600static void sierra_net_get_drvinfo(struct net_device *net,
601 struct ethtool_drvinfo *info)
602{
603
604 usbnet_get_drvinfo(net, info);
605 strlcpy(info->driver, driver_name, sizeof(info->driver));
606 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
607}
608
609static u32 sierra_net_get_link(struct net_device *net)
610{
611 struct usbnet *dev = netdev_priv(net);
612
613 return sierra_net_get_private(dev)->link_up && netif_running(net);
614}
615
616static const struct ethtool_ops sierra_net_ethtool_ops = {
617 .get_drvinfo = sierra_net_get_drvinfo,
618 .get_link = sierra_net_get_link,
619 .get_msglevel = usbnet_get_msglevel,
620 .set_msglevel = usbnet_set_msglevel,
621 .get_settings = usbnet_get_settings,
622 .set_settings = usbnet_set_settings,
623 .nway_reset = usbnet_nway_reset,
624};
625
626
627static int sierra_net_change_mtu(struct net_device *net, int new_mtu)
628{
629 if (new_mtu > SIERRA_NET_MAX_SUPPORTED_MTU)
630 return -EINVAL;
631
632 return usbnet_change_mtu(net, new_mtu);
633}
634
635static int sierra_net_get_fw_attr(struct usbnet *dev, u16 *datap)
636{
637 int result = 0;
638 __le16 attrdata;
639
640 result = usbnet_read_cmd(dev,
641
642 SWI_USB_REQUEST_GET_FW_ATTR,
643 USB_DIR_IN | USB_TYPE_VENDOR,
644 0x0000,
645 0x0000,
646 &attrdata,
647 sizeof(attrdata)
648 );
649
650 if (result < 0)
651 return -EIO;
652
653 *datap = le16_to_cpu(attrdata);
654 return result;
655}
656
657
658
659
660static int sierra_net_bind(struct usbnet *dev, struct usb_interface *intf)
661{
662 u8 ifacenum;
663 u8 numendpoints;
664 u16 fwattr = 0;
665 int status;
666 struct ethhdr *eth;
667 struct sierra_net_data *priv;
668 static const u8 sync_tmplate[sizeof(priv->sync_msg)] = {
669 0x00, 0x00, SIERRA_NET_HIP_MSYNC_ID, 0x00};
670 static const u8 shdwn_tmplate[sizeof(priv->shdwn_msg)] = {
671 0x00, 0x00, SIERRA_NET_HIP_SHUTD_ID, 0x00};
672
673 dev_dbg(&dev->udev->dev, "%s", __func__);
674
675 ifacenum = intf->cur_altsetting->desc.bInterfaceNumber;
676 numendpoints = intf->cur_altsetting->desc.bNumEndpoints;
677
678 if (numendpoints != 3) {
679 dev_err(&dev->udev->dev, "Expected 3 endpoints, found: %d",
680 numendpoints);
681 return -ENODEV;
682 }
683
684 dev->status = NULL;
685 status = usbnet_get_endpoints(dev, intf);
686 if (status < 0) {
687 dev_err(&dev->udev->dev, "Error in usbnet_get_endpoints (%d)",
688 status);
689 return -ENODEV;
690 }
691
692 priv = kzalloc(sizeof *priv, GFP_KERNEL);
693 if (!priv)
694 return -ENOMEM;
695
696 priv->usbnet = dev;
697 priv->ifnum = ifacenum;
698 dev->net->netdev_ops = &sierra_net_device_ops;
699
700
701 dev->net->dev_addr[ETH_ALEN-2] = atomic_inc_return(&iface_counter);
702 dev->net->dev_addr[ETH_ALEN-1] = ifacenum;
703
704
705 eth = (struct ethhdr *)priv->ethr_hdr_tmpl;
706 memcpy(ð->h_dest, dev->net->dev_addr, ETH_ALEN);
707 eth->h_proto = cpu_to_be16(ETH_P_IP);
708
709
710 memcpy(priv->shdwn_msg, shdwn_tmplate, sizeof(priv->shdwn_msg));
711
712 sierra_net_set_ctx_index(priv, 0);
713
714
715 memcpy(priv->sync_msg, sync_tmplate, sizeof(priv->sync_msg));
716
717
718 dev->rx_urb_size = SIERRA_NET_RX_URB_SIZE;
719 if (dev->udev->speed != USB_SPEED_HIGH)
720 dev->rx_urb_size = min_t(size_t, 4096, SIERRA_NET_RX_URB_SIZE);
721
722 dev->net->hard_header_len += SIERRA_NET_HIP_EXT_HDR_LEN;
723 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
724
725
726 dev->net->flags |= IFF_NOARP;
727 dev->net->ethtool_ops = &sierra_net_ethtool_ops;
728 netif_carrier_off(dev->net);
729
730 sierra_net_set_private(dev, priv);
731
732 priv->kevent_flags = 0;
733
734
735 INIT_WORK(&priv->sierra_net_kevent, sierra_net_kevent);
736
737
738 init_timer(&priv->sync_timer);
739
740
741 status = sierra_net_get_fw_attr(dev, &fwattr);
742 dev_dbg(&dev->udev->dev, "Fw attr: %x\n", fwattr);
743
744
745 if (!(status == sizeof(fwattr) && (fwattr & SWI_GET_FW_ATTR_MASK))) {
746
747 dev_err(&dev->udev->dev, "Incompatible driver and firmware"
748 " versions\n");
749 kfree(priv);
750 return -ENODEV;
751 }
752
753 return 0;
754}
755
756static void sierra_net_unbind(struct usbnet *dev, struct usb_interface *intf)
757{
758 int status;
759 struct sierra_net_data *priv = sierra_net_get_private(dev);
760
761 dev_dbg(&dev->udev->dev, "%s", __func__);
762
763
764 del_timer_sync(&priv->sync_timer);
765 cancel_work_sync(&priv->sierra_net_kevent);
766
767
768 status = sierra_net_send_cmd(dev, priv->shdwn_msg,
769 sizeof(priv->shdwn_msg), "Shutdown");
770 if (status < 0)
771 netdev_err(dev->net,
772 "usb_control_msg failed, status %d\n", status);
773
774 usbnet_status_stop(dev);
775
776 sierra_net_set_private(dev, NULL);
777 kfree(priv);
778}
779
780static struct sk_buff *sierra_net_skb_clone(struct usbnet *dev,
781 struct sk_buff *skb, int len)
782{
783 struct sk_buff *new_skb;
784
785
786 new_skb = skb_clone(skb, GFP_ATOMIC);
787
788
789 skb_pull(skb, len);
790
791
792 if (new_skb) {
793 skb_trim(new_skb, len);
794 } else {
795 if (netif_msg_rx_err(dev))
796 netdev_err(dev->net, "failed to get skb\n");
797 dev->net->stats.rx_dropped++;
798 }
799
800 return new_skb;
801}
802
803
804static int sierra_net_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
805{
806 int err;
807 struct hip_hdr hh;
808 struct sk_buff *new_skb;
809
810 dev_dbg(&dev->udev->dev, "%s", __func__);
811
812
813 while (likely(skb->len)) {
814 err = parse_hip(skb->data, skb->len, &hh);
815 if (err) {
816 if (netif_msg_rx_err(dev))
817 netdev_err(dev->net, "Invalid HIP header %d\n",
818 err);
819
820 dev->net->stats.rx_length_errors++;
821 return 0;
822 }
823
824
825 if (!hh.extmsgid.is_present
826 || hh.extmsgid.word != SIERRA_NET_HIP_EXT_IP_IN_ID) {
827 if (netif_msg_rx_err(dev))
828 netdev_err(dev->net, "HIP/ETH: Invalid pkt\n");
829
830 dev->net->stats.rx_frame_errors++;
831
832 return 0;
833 }
834
835 skb_pull(skb, hh.hdrlen);
836
837
838 memcpy(skb->data, sierra_net_get_private(dev)->ethr_hdr_tmpl,
839 ETH_HLEN);
840
841
842 if (hh.payload_len.word == skb->len)
843 return 1;
844
845 new_skb = sierra_net_skb_clone(dev, skb, hh.payload_len.word);
846 if (new_skb)
847 usbnet_skb_return(dev, new_skb);
848
849 }
850
851 return 0;
852}
853
854
855static struct sk_buff *sierra_net_tx_fixup(struct usbnet *dev,
856 struct sk_buff *skb, gfp_t flags)
857{
858 struct sierra_net_data *priv = sierra_net_get_private(dev);
859 u16 len;
860 bool need_tail;
861
862 BUILD_BUG_ON(FIELD_SIZEOF(struct usbnet, data)
863 < sizeof(struct cdc_state));
864
865 dev_dbg(&dev->udev->dev, "%s", __func__);
866 if (priv->link_up && check_ethip_packet(skb, dev) && is_ip(skb)) {
867
868 if (SIERRA_NET_HIP_EXT_HDR_LEN <= skb_headroom(skb)) {
869
870 len = skb->len;
871 skb_push(skb, SIERRA_NET_HIP_EXT_HDR_LEN);
872
873 need_tail = ((len + SIERRA_NET_HIP_EXT_HDR_LEN)
874 % dev->maxpacket == 0);
875 if (need_tail) {
876 if (unlikely(skb_tailroom(skb) == 0)) {
877 netdev_err(dev->net, "tx_fixup:"
878 "no room for packet\n");
879 dev_kfree_skb_any(skb);
880 return NULL;
881 } else {
882 skb->data[skb->len] = 0;
883 __skb_put(skb, 1);
884 len = len + 1;
885 }
886 }
887 build_hip(skb->data, len, priv);
888 return skb;
889 } else {
890
891
892
893 netdev_err(dev->net, "tx_fixup: no room for HIP\n");
894 }
895 }
896
897 if (!priv->link_up)
898 dev->net->stats.tx_carrier_errors++;
899
900
901
902
903 dev_kfree_skb_any(skb);
904 return NULL;
905}
906
907static const struct driver_info sierra_net_info_direct_ip = {
908 .description = "Sierra Wireless USB-to-WWAN Modem",
909 .flags = FLAG_WWAN | FLAG_SEND_ZLP,
910 .bind = sierra_net_bind,
911 .unbind = sierra_net_unbind,
912 .status = sierra_net_status,
913 .rx_fixup = sierra_net_rx_fixup,
914 .tx_fixup = sierra_net_tx_fixup,
915};
916
917static int
918sierra_net_probe(struct usb_interface *udev, const struct usb_device_id *prod)
919{
920 int ret;
921
922 ret = usbnet_probe(udev, prod);
923 if (ret == 0) {
924 struct usbnet *dev = usb_get_intfdata(udev);
925
926 ret = usbnet_status_start(dev, GFP_KERNEL);
927 if (ret == 0) {
928
929 sierra_net_dosync(dev);
930 }
931 }
932 return ret;
933}
934
935#define DIRECT_IP_DEVICE(vend, prod) \
936 {USB_DEVICE_INTERFACE_NUMBER(vend, prod, 7), \
937 .driver_info = (unsigned long)&sierra_net_info_direct_ip}, \
938 {USB_DEVICE_INTERFACE_NUMBER(vend, prod, 10), \
939 .driver_info = (unsigned long)&sierra_net_info_direct_ip}, \
940 {USB_DEVICE_INTERFACE_NUMBER(vend, prod, 11), \
941 .driver_info = (unsigned long)&sierra_net_info_direct_ip}
942
943static const struct usb_device_id products[] = {
944 DIRECT_IP_DEVICE(0x1199, 0x68A3),
945 DIRECT_IP_DEVICE(0x0F3D, 0x68A3),
946 DIRECT_IP_DEVICE(0x1199, 0x68AA),
947 DIRECT_IP_DEVICE(0x0F3D, 0x68AA),
948
949 {},
950};
951MODULE_DEVICE_TABLE(usb, products);
952
953
954static struct usb_driver sierra_net_driver = {
955 .name = "sierra_net",
956 .id_table = products,
957 .probe = sierra_net_probe,
958 .disconnect = usbnet_disconnect,
959 .suspend = usbnet_suspend,
960 .resume = usbnet_resume,
961 .no_dynamic_id = 1,
962 .disable_hub_initiated_lpm = 1,
963};
964
965module_usb_driver(sierra_net_driver);
966
967MODULE_AUTHOR(DRIVER_AUTHOR);
968MODULE_DESCRIPTION(DRIVER_DESC);
969MODULE_VERSION(DRIVER_VERSION);
970MODULE_LICENSE("GPL");
971