4 * Copyright (C) ST-Ericsson 2010-2012
5 * Contact: Alexey Orishko <alexey.orishko@stericsson.com>
6 * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com>
8 * USB Host Driver for Network Control Model (NCM)
9 * http://www.usb.org/developers/devclass_docs/NCM10.zip
11 * The NCM encoding, decoding and initialization logic
12 * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h
14 * This software is available to you under a choice of one of two
15 * licenses. You may choose this file to be licensed under the terms
16 * of the GNU General Public License (GPL) Version 2 or the 2-clause
17 * BSD license listed below:
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 #include <linux/module.h>
42 #include <linux/netdevice.h>
43 #include <linux/ctype.h>
44 #include <linux/ethtool.h>
45 #include <linux/workqueue.h>
46 #include <linux/mii.h>
47 #include <linux/crc32.h>
48 #include <linux/usb.h>
49 #include <linux/hrtimer.h>
50 #include <linux/atomic.h>
51 #include <linux/usb/usbnet.h>
52 #include <linux/usb/cdc.h>
53 #include <linux/usb/cdc_ncm.h>
55 #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
56 static bool prefer_mbim = true;
58 static bool prefer_mbim;
60 module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR);
61 MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
63 static void cdc_ncm_txpath_bh(unsigned long param);
64 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx);
65 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer);
66 static struct usb_driver cdc_ncm_driver;
68 static int cdc_ncm_get_coalesce(struct net_device *netdev,
69 struct ethtool_coalesce *ec)
71 struct usbnet *dev = netdev_priv(netdev);
72 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
74 /* assuming maximum sized dgrams and ignoring NDPs */
75 ec->rx_max_coalesced_frames = ctx->rx_max / ctx->max_datagram_size;
76 ec->tx_max_coalesced_frames = ctx->tx_max / ctx->max_datagram_size;
78 /* the timer will fire CDC_NCM_TIMER_PENDING_CNT times in a row */
79 ec->tx_coalesce_usecs = (ctx->timer_interval * CDC_NCM_TIMER_PENDING_CNT) / NSEC_PER_USEC;
83 static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx);
85 static int cdc_ncm_set_coalesce(struct net_device *netdev,
86 struct ethtool_coalesce *ec)
88 struct usbnet *dev = netdev_priv(netdev);
89 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
90 u32 new_rx_max = ctx->rx_max;
91 u32 new_tx_max = ctx->tx_max;
93 /* assuming maximum sized dgrams and a single NDP */
94 if (ec->rx_max_coalesced_frames)
95 new_rx_max = ec->rx_max_coalesced_frames * ctx->max_datagram_size;
96 if (ec->tx_max_coalesced_frames)
97 new_tx_max = ec->tx_max_coalesced_frames * ctx->max_datagram_size;
99 if (ec->tx_coalesce_usecs &&
100 (ec->tx_coalesce_usecs < CDC_NCM_TIMER_INTERVAL_MIN * CDC_NCM_TIMER_PENDING_CNT ||
101 ec->tx_coalesce_usecs > CDC_NCM_TIMER_INTERVAL_MAX * CDC_NCM_TIMER_PENDING_CNT))
104 spin_lock_bh(&ctx->mtx);
105 ctx->timer_interval = ec->tx_coalesce_usecs * NSEC_PER_USEC / CDC_NCM_TIMER_PENDING_CNT;
106 if (!ctx->timer_interval)
107 ctx->tx_timer_pending = 0;
108 spin_unlock_bh(&ctx->mtx);
110 /* inform device of new values */
111 if (new_rx_max != ctx->rx_max || new_tx_max != ctx->tx_max)
112 cdc_ncm_update_rxtx_max(dev, new_rx_max, new_tx_max);
116 static const struct ethtool_ops cdc_ncm_ethtool_ops = {
117 .get_settings = usbnet_get_settings,
118 .set_settings = usbnet_set_settings,
119 .get_link = usbnet_get_link,
120 .nway_reset = usbnet_nway_reset,
121 .get_drvinfo = usbnet_get_drvinfo,
122 .get_msglevel = usbnet_get_msglevel,
123 .set_msglevel = usbnet_set_msglevel,
124 .get_ts_info = ethtool_op_get_ts_info,
125 .get_coalesce = cdc_ncm_get_coalesce,
126 .set_coalesce = cdc_ncm_set_coalesce,
129 /* handle rx_max and tx_max changes */
130 static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx)
132 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
133 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
136 /* clamp new_rx to sane values */
137 min = USB_CDC_NCM_NTB_MIN_IN_SIZE;
138 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
140 /* dwNtbInMaxSize spec violation? Use MIN size for both limits */
142 dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n",
143 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min);
147 val = clamp_t(u32, new_rx, min, max);
149 dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range. Using %u\n",
153 /* usbnet use these values for sizing rx queues */
154 dev->rx_urb_size = val;
156 /* inform device about NTB input size changes */
157 if (val != ctx->rx_max) {
158 __le32 dwNtbInMaxSize = cpu_to_le32(val);
160 dev_info(&dev->intf->dev, "setting rx_max = %u\n", val);
162 /* need to unlink rx urbs before increasing buffer size */
163 if (netif_running(dev->net) && dev->rx_urb_size > ctx->rx_max)
164 usbnet_unlink_rx_urbs(dev);
166 /* tell device to use new size */
167 if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
168 USB_TYPE_CLASS | USB_DIR_OUT
169 | USB_RECIP_INTERFACE,
170 0, iface_no, &dwNtbInMaxSize, 4) < 0)
171 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n");
176 /* clamp new_tx to sane values */
177 min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16);
178 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
180 /* some devices set dwNtbOutMaxSize too low for the above default */
183 val = clamp_t(u32, new_tx, min, max);
185 dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range. Using %u\n",
188 if (val != ctx->tx_max)
189 dev_info(&dev->intf->dev, "setting tx_max = %u\n", val);
191 /* Adding a pad byte here if necessary simplifies the handling
192 * in cdc_ncm_fill_tx_frame, making tx_max always represent
193 * the real skb max size.
195 * We cannot use dev->maxpacket here because this is called from
196 * .bind which is called before usbnet sets up dev->maxpacket
198 if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) &&
199 val % usb_maxpacket(dev->udev, dev->out, 1) == 0)
202 /* we might need to flush any pending tx buffers if running */
203 if (netif_running(dev->net) && val > ctx->tx_max) {
204 netif_tx_lock_bh(dev->net);
205 usbnet_start_xmit(NULL, dev->net);
207 netif_tx_unlock_bh(dev->net);
212 dev->hard_mtu = ctx->tx_max;
214 /* max qlen depend on hard_mtu and rx_urb_size */
215 usbnet_update_max_qlen(dev);
218 /* helpers for NCM and MBIM differences */
219 static u8 cdc_ncm_flags(struct usbnet *dev)
221 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
223 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
224 return ctx->mbim_desc->bmNetworkCapabilities;
226 return ctx->func_desc->bmNetworkCapabilities;
230 static int cdc_ncm_eth_hlen(struct usbnet *dev)
232 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
237 static u32 cdc_ncm_min_dgram_size(struct usbnet *dev)
239 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
240 return CDC_MBIM_MIN_DATAGRAM_SIZE;
241 return CDC_NCM_MIN_DATAGRAM_SIZE;
244 static u32 cdc_ncm_max_dgram_size(struct usbnet *dev)
246 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
248 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
249 return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
251 return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
252 return CDC_NCM_MAX_DATAGRAM_SIZE;
255 /* initial one-time device setup. MUST be called with the data interface
258 static int cdc_ncm_init(struct usbnet *dev)
260 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
261 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
264 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
265 USB_TYPE_CLASS | USB_DIR_IN
266 |USB_RECIP_INTERFACE,
267 0, iface_no, &ctx->ncm_parm,
268 sizeof(ctx->ncm_parm));
270 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
271 return err; /* GET_NTB_PARAMETERS is required */
275 if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) {
276 dev_dbg(&dev->intf->dev, "Setting CRC mode off\n");
277 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
278 USB_TYPE_CLASS | USB_DIR_OUT
279 | USB_RECIP_INTERFACE,
280 USB_CDC_NCM_CRC_NOT_APPENDED,
283 dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n");
286 /* set NTB format, if both formats are supported.
288 * "The host shall only send this command while the NCM Data
289 * Interface is in alternate setting 0."
291 if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & USB_CDC_NCM_NTH32_SIGN) {
292 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n");
293 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
294 USB_TYPE_CLASS | USB_DIR_OUT
295 | USB_RECIP_INTERFACE,
296 USB_CDC_NCM_NTB16_FORMAT,
299 dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n");
302 /* set initial device values */
303 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
304 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
305 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
306 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
307 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment);
308 /* devices prior to NCM Errata shall set this field to zero */
309 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
311 dev_dbg(&dev->intf->dev,
312 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
313 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
314 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev));
316 /* max count of tx datagrams */
317 if ((ctx->tx_max_datagrams == 0) ||
318 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
319 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
321 /* set up maximum NDP size */
322 ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16);
324 /* initial coalescing timer interval */
325 ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC;
330 /* set a new max datagram size */
331 static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size)
333 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
334 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
335 __le16 max_datagram_size;
339 /* set default based on descriptors */
340 ctx->max_datagram_size = clamp_t(u32, new_size,
341 cdc_ncm_min_dgram_size(dev),
342 CDC_NCM_MAX_DATAGRAM_SIZE);
344 /* inform the device about the selected Max Datagram Size? */
345 if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE))
348 /* read current mtu value from device */
349 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
350 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
351 0, iface_no, &max_datagram_size, 2);
353 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n");
357 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size)
360 max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
361 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE,
362 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE,
363 0, iface_no, &max_datagram_size, 2);
365 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n");
368 /* set MTU to max supported by the device if necessary */
369 dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev));
371 /* do not exceed operater preferred MTU */
372 if (ctx->mbim_extended_desc) {
373 mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU);
374 if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu)
375 dev->net->mtu = mbim_mtu;
379 static void cdc_ncm_fix_modulus(struct usbnet *dev)
381 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
385 * verify that the structure alignment is:
387 * - not greater than the maximum transmit length
388 * - not less than four bytes
390 val = ctx->tx_ndp_modulus;
392 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
393 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
394 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n");
395 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
399 * verify that the payload alignment is:
401 * - not greater than the maximum transmit length
402 * - not less than four bytes
404 val = ctx->tx_modulus;
406 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
407 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
408 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n");
409 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
412 /* verify the payload remainder */
413 if (ctx->tx_remainder >= ctx->tx_modulus) {
414 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n");
415 ctx->tx_remainder = 0;
418 /* adjust TX-remainder according to NCM specification. */
419 ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) &
420 (ctx->tx_modulus - 1));
423 static int cdc_ncm_setup(struct usbnet *dev)
425 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
427 /* clamp rx_max and tx_max and inform device */
428 cdc_ncm_update_rxtx_max(dev, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize),
429 le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
431 /* sanitize the modulus and remainder values */
432 cdc_ncm_fix_modulus(dev);
434 /* set max datagram size */
435 cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev));
440 cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
442 struct usb_host_endpoint *e, *in = NULL, *out = NULL;
445 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
447 e = intf->cur_altsetting->endpoint + ep;
448 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
449 case USB_ENDPOINT_XFER_INT:
450 if (usb_endpoint_dir_in(&e->desc)) {
456 case USB_ENDPOINT_XFER_BULK:
457 if (usb_endpoint_dir_in(&e->desc)) {
471 dev->in = usb_rcvbulkpipe(dev->udev,
472 in->desc.bEndpointAddress &
473 USB_ENDPOINT_NUMBER_MASK);
474 if (out && !dev->out)
475 dev->out = usb_sndbulkpipe(dev->udev,
476 out->desc.bEndpointAddress &
477 USB_ENDPOINT_NUMBER_MASK);
480 static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
485 if (ctx->tx_rem_skb != NULL) {
486 dev_kfree_skb_any(ctx->tx_rem_skb);
487 ctx->tx_rem_skb = NULL;
490 if (ctx->tx_curr_skb != NULL) {
491 dev_kfree_skb_any(ctx->tx_curr_skb);
492 ctx->tx_curr_skb = NULL;
498 int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
500 const struct usb_cdc_union_desc *union_desc = NULL;
501 struct cdc_ncm_ctx *ctx;
502 struct usb_driver *driver;
508 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
512 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
513 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
514 ctx->bh.data = (unsigned long)dev;
515 ctx->bh.func = cdc_ncm_txpath_bh;
516 atomic_set(&ctx->stop, 0);
517 spin_lock_init(&ctx->mtx);
519 /* store ctx pointer in device data field */
520 dev->data[0] = (unsigned long)ctx;
522 /* only the control interface can be successfully probed */
525 /* get some pointers */
526 driver = driver_of(intf);
527 buf = intf->cur_altsetting->extra;
528 len = intf->cur_altsetting->extralen;
530 /* parse through descriptors associated with control interface */
531 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
533 if (buf[1] != USB_DT_CS_INTERFACE)
537 case USB_CDC_UNION_TYPE:
538 if (buf[0] < sizeof(*union_desc))
541 union_desc = (const struct usb_cdc_union_desc *)buf;
542 /* the master must be the interface we are probing */
543 if (intf->cur_altsetting->desc.bInterfaceNumber !=
544 union_desc->bMasterInterface0) {
545 dev_dbg(&intf->dev, "bogus CDC Union\n");
548 ctx->data = usb_ifnum_to_if(dev->udev,
549 union_desc->bSlaveInterface0);
552 case USB_CDC_ETHERNET_TYPE:
553 if (buf[0] < sizeof(*(ctx->ether_desc)))
557 (const struct usb_cdc_ether_desc *)buf;
560 case USB_CDC_NCM_TYPE:
561 if (buf[0] < sizeof(*(ctx->func_desc)))
564 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
567 case USB_CDC_MBIM_TYPE:
568 if (buf[0] < sizeof(*(ctx->mbim_desc)))
571 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
574 case USB_CDC_MBIM_EXTENDED_TYPE:
575 if (buf[0] < sizeof(*(ctx->mbim_extended_desc)))
578 ctx->mbim_extended_desc =
579 (const struct usb_cdc_mbim_extended_desc *)buf;
586 /* advance to next descriptor */
592 /* some buggy devices have an IAD but no CDC Union */
593 if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
594 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
595 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
598 /* check if we got everything */
600 dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n");
603 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) {
604 if (!ctx->mbim_desc) {
605 dev_dbg(&intf->dev, "MBIM functional descriptor missing\n");
609 if (!ctx->ether_desc || !ctx->func_desc) {
610 dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n");
615 /* claim data interface, if different from control */
616 if (ctx->data != ctx->control) {
617 temp = usb_driver_claim_interface(driver, ctx->data, dev);
619 dev_dbg(&intf->dev, "failed to claim data intf\n");
624 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
626 /* reset data interface */
627 temp = usb_set_interface(dev->udev, iface_no, 0);
629 dev_dbg(&intf->dev, "set interface failed\n");
633 /* initialize basic device settings */
634 if (cdc_ncm_init(dev))
637 /* configure data interface */
638 temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
640 dev_dbg(&intf->dev, "set interface failed\n");
644 cdc_ncm_find_endpoints(dev, ctx->data);
645 cdc_ncm_find_endpoints(dev, ctx->control);
646 if (!dev->in || !dev->out || !dev->status) {
647 dev_dbg(&intf->dev, "failed to collect endpoints\n");
651 usb_set_intfdata(ctx->data, dev);
652 usb_set_intfdata(ctx->control, dev);
654 if (ctx->ether_desc) {
655 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
657 dev_dbg(&intf->dev, "failed to get mac address\n");
660 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
663 /* finish setting up the device specific data */
666 /* override ethtool_ops */
667 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
672 usb_set_intfdata(ctx->control, NULL);
673 usb_set_intfdata(ctx->data, NULL);
674 if (ctx->data != ctx->control)
675 usb_driver_release_interface(driver, ctx->data);
677 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
679 dev_info(&intf->dev, "bind() failure\n");
682 EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
684 void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
686 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
687 struct usb_driver *driver = driver_of(intf);
690 return; /* no setup */
692 atomic_set(&ctx->stop, 1);
694 if (hrtimer_active(&ctx->tx_timer))
695 hrtimer_cancel(&ctx->tx_timer);
697 tasklet_kill(&ctx->bh);
699 /* handle devices with combined control and data interface */
700 if (ctx->control == ctx->data)
703 /* disconnect master --> disconnect slave */
704 if (intf == ctx->control && ctx->data) {
705 usb_set_intfdata(ctx->data, NULL);
706 usb_driver_release_interface(driver, ctx->data);
709 } else if (intf == ctx->data && ctx->control) {
710 usb_set_intfdata(ctx->control, NULL);
711 usb_driver_release_interface(driver, ctx->control);
715 usb_set_intfdata(intf, NULL);
718 EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
720 /* Return the number of the MBIM control interface altsetting iff it
721 * is preferred and available,
723 u8 cdc_ncm_select_altsetting(struct usb_interface *intf)
725 struct usb_host_interface *alt;
727 /* The MBIM spec defines a NCM compatible default altsetting,
728 * which we may have matched:
730 * "Functions that implement both NCM 1.0 and MBIM (an
731 * “NCM/MBIM function”) according to this recommendation
732 * shall provide two alternate settings for the
733 * Communication Interface. Alternate setting 0, and the
734 * associated class and endpoint descriptors, shall be
735 * constructed according to the rules given for the
736 * Communication Interface in section 5 of [USBNCM10].
737 * Alternate setting 1, and the associated class and
738 * endpoint descriptors, shall be constructed according to
739 * the rules given in section 6 (USB Device Model) of this
742 if (intf->num_altsetting < 2)
743 return intf->cur_altsetting->desc.bAlternateSetting;
746 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
747 if (alt && cdc_ncm_comm_intf_is_mbim(alt))
748 return CDC_NCM_COMM_ALTSETTING_MBIM;
750 return CDC_NCM_COMM_ALTSETTING_NCM;
752 EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
754 static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
758 /* MBIM backwards compatible function? */
759 if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM)
762 /* The NCM data altsetting is fixed */
763 ret = cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM);
766 * We should get an event when network connection is "connected" or
767 * "disconnected". Set network connection in "disconnected" state
768 * (carrier is OFF) during attach, so the IP network stack does not
769 * start IPv6 negotiation and more.
771 usbnet_link_change(dev, 0, 0);
775 static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
777 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
779 if (skb->len + align > max)
780 align = max - skb->len;
781 if (align && skb_tailroom(skb) >= align)
782 memset(skb_put(skb, align), 0, align);
785 /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
786 * allocating a new one within skb
788 static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
790 struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
791 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
792 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
794 /* follow the chain of NDPs, looking for a match */
796 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
797 if (ndp16->dwSignature == sign)
799 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
803 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max);
805 /* verify that there is room for the NDP and the datagram (reserve) */
806 if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size)
811 ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
813 nth16->wNdpIndex = cpu_to_le16(skb->len);
815 /* push a new empty NDP */
816 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size);
817 ndp16->dwSignature = sign;
818 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
823 cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
825 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
826 struct usb_cdc_ncm_nth16 *nth16;
827 struct usb_cdc_ncm_ndp16 *ndp16;
828 struct sk_buff *skb_out;
829 u16 n = 0, index, ndplen;
832 /* if there is a remaining skb, it gets priority */
834 swap(skb, ctx->tx_rem_skb);
835 swap(sign, ctx->tx_rem_sign);
840 /* check if we are resuming an OUT skb */
841 skb_out = ctx->tx_curr_skb;
843 /* allocate a new OUT skb */
845 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC);
846 if (skb_out == NULL) {
848 dev_kfree_skb_any(skb);
849 dev->net->stats.tx_dropped++;
853 /* fill out the initial 16-bit NTB header */
854 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16));
855 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
856 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
857 nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
859 /* count total number of frames in this NTB */
860 ctx->tx_curr_frame_num = 0;
863 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
864 /* send any remaining skb first */
866 skb = ctx->tx_rem_skb;
867 sign = ctx->tx_rem_sign;
868 ctx->tx_rem_skb = NULL;
870 /* check for end of skb */
875 /* get the appropriate NDP for this skb */
876 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
878 /* align beginning of next frame */
879 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max);
881 /* check if we had enough room left for both NDP and frame */
882 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) {
884 /* won't fit, MTU problem? */
885 dev_kfree_skb_any(skb);
887 dev->net->stats.tx_dropped++;
889 /* no room for skb - store for later */
890 if (ctx->tx_rem_skb != NULL) {
891 dev_kfree_skb_any(ctx->tx_rem_skb);
892 dev->net->stats.tx_dropped++;
894 ctx->tx_rem_skb = skb;
895 ctx->tx_rem_sign = sign;
902 /* calculate frame number withing this NDP */
903 ndplen = le16_to_cpu(ndp16->wLength);
904 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
906 /* OK, add this skb */
907 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
908 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
909 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
910 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len);
911 dev_kfree_skb_any(skb);
914 /* send now if this NDP is full */
915 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
921 /* free up any dangling skb */
923 dev_kfree_skb_any(skb);
925 dev->net->stats.tx_dropped++;
928 ctx->tx_curr_frame_num = n;
931 /* wait for more frames */
933 ctx->tx_curr_skb = skb_out;
936 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) {
937 /* wait for more frames */
939 ctx->tx_curr_skb = skb_out;
940 /* set the pending count */
941 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
942 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
947 /* variables will be reset at next call */
950 /* If collected data size is less or equal CDC_NCM_MIN_TX_PKT
951 * bytes, we send buffers as it is. If we get more data, it
952 * would be more efficient for USB HS mobile device with DMA
953 * engine to receive a full size NTB, than canceling DMA
954 * transfer and receiving a short packet.
956 * This optimization support is pointless if we end up sending
957 * a ZLP after full sized NTBs.
959 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) &&
960 skb_out->len > CDC_NCM_MIN_TX_PKT)
961 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0,
962 ctx->tx_max - skb_out->len);
963 else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0)
964 *skb_put(skb_out, 1) = 0; /* force short packet */
966 /* set final frame length */
967 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
968 nth16->wBlockLength = cpu_to_le16(skb_out->len);
971 ctx->tx_curr_skb = NULL;
972 dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
976 /* Start timer, if there is a remaining skb */
977 if (ctx->tx_curr_skb != NULL)
978 cdc_ncm_tx_timeout_start(ctx);
981 EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
983 static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
985 /* start timer, if not already started */
986 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
987 hrtimer_start(&ctx->tx_timer,
988 ktime_set(0, ctx->timer_interval),
992 static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
994 struct cdc_ncm_ctx *ctx =
995 container_of(timer, struct cdc_ncm_ctx, tx_timer);
997 if (!atomic_read(&ctx->stop))
998 tasklet_schedule(&ctx->bh);
999 return HRTIMER_NORESTART;
1002 static void cdc_ncm_txpath_bh(unsigned long param)
1004 struct usbnet *dev = (struct usbnet *)param;
1005 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1007 spin_lock_bh(&ctx->mtx);
1008 if (ctx->tx_timer_pending != 0) {
1009 ctx->tx_timer_pending--;
1010 cdc_ncm_tx_timeout_start(ctx);
1011 spin_unlock_bh(&ctx->mtx);
1012 } else if (dev->net != NULL) {
1013 spin_unlock_bh(&ctx->mtx);
1014 netif_tx_lock_bh(dev->net);
1015 usbnet_start_xmit(NULL, dev->net);
1016 netif_tx_unlock_bh(dev->net);
1018 spin_unlock_bh(&ctx->mtx);
1023 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
1025 struct sk_buff *skb_out;
1026 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1029 * The Ethernet API we are using does not support transmitting
1030 * multiple Ethernet frames in a single call. This driver will
1031 * accumulate multiple Ethernet frames and send out a larger
1032 * USB frame when the USB buffer is full or when a single jiffies
1038 spin_lock_bh(&ctx->mtx);
1039 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
1040 spin_unlock_bh(&ctx->mtx);
1045 dev_kfree_skb_any(skb);
1049 EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup);
1051 /* verify NTB header and return offset of first NDP, or negative error */
1052 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
1054 struct usbnet *dev = netdev_priv(skb_in->dev);
1055 struct usb_cdc_ncm_nth16 *nth16;
1062 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
1063 sizeof(struct usb_cdc_ncm_ndp16))) {
1064 netif_dbg(dev, rx_err, dev->net, "frame too short\n");
1068 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
1070 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
1071 netif_dbg(dev, rx_err, dev->net,
1072 "invalid NTH16 signature <%#010x>\n",
1073 le32_to_cpu(nth16->dwSignature));
1077 len = le16_to_cpu(nth16->wBlockLength);
1078 if (len > ctx->rx_max) {
1079 netif_dbg(dev, rx_err, dev->net,
1080 "unsupported NTB block length %u/%u\n", len,
1085 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
1086 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
1087 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
1088 netif_dbg(dev, rx_err, dev->net,
1089 "sequence number glitch prev=%d curr=%d\n",
1090 ctx->rx_seq, le16_to_cpu(nth16->wSequence));
1092 ctx->rx_seq = le16_to_cpu(nth16->wSequence);
1094 ret = le16_to_cpu(nth16->wNdpIndex);
1098 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
1100 /* verify NDP header and return number of datagrams, or negative error */
1101 int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
1103 struct usbnet *dev = netdev_priv(skb_in->dev);
1104 struct usb_cdc_ncm_ndp16 *ndp16;
1107 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
1108 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
1112 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
1114 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
1115 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n",
1116 le16_to_cpu(ndp16->wLength));
1120 ret = ((le16_to_cpu(ndp16->wLength) -
1121 sizeof(struct usb_cdc_ncm_ndp16)) /
1122 sizeof(struct usb_cdc_ncm_dpe16));
1123 ret--; /* we process NDP entries except for the last one */
1125 if ((sizeof(struct usb_cdc_ncm_ndp16) +
1126 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) {
1127 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
1134 EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
1136 int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
1138 struct sk_buff *skb;
1139 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1144 struct usb_cdc_ncm_ndp16 *ndp16;
1145 struct usb_cdc_ncm_dpe16 *dpe16;
1147 int loopcount = 50; /* arbitrary max preventing infinite loop */
1149 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
1154 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
1158 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
1160 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) {
1161 netif_dbg(dev, rx_err, dev->net,
1162 "invalid DPT16 signature <%#010x>\n",
1163 le32_to_cpu(ndp16->dwSignature));
1166 dpe16 = ndp16->dpe16;
1168 for (x = 0; x < nframes; x++, dpe16++) {
1169 offset = le16_to_cpu(dpe16->wDatagramIndex);
1170 len = le16_to_cpu(dpe16->wDatagramLength);
1174 * All entries after first NULL entry are to be ignored
1176 if ((offset == 0) || (len == 0)) {
1178 goto err_ndp; /* empty NTB */
1182 /* sanity checking */
1183 if (((offset + len) > skb_in->len) ||
1184 (len > ctx->rx_max) || (len < ETH_HLEN)) {
1185 netif_dbg(dev, rx_err, dev->net,
1186 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
1187 x, offset, len, skb_in);
1193 skb = skb_clone(skb_in, GFP_ATOMIC);
1197 skb->data = ((u8 *)skb_in->data) + offset;
1198 skb_set_tail_pointer(skb, len);
1199 usbnet_skb_return(dev, skb);
1203 /* are there more NDPs to process? */
1204 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
1205 if (ndpoffset && loopcount--)
1212 EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup);
1215 cdc_ncm_speed_change(struct usbnet *dev,
1216 struct usb_cdc_speed_change *data)
1218 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1219 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
1222 * Currently the USB-NET API does not support reporting the actual
1223 * device speed. Do print it instead.
1225 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
1226 netif_info(dev, link, dev->net,
1227 "%u mbit/s downlink %u mbit/s uplink\n",
1228 (unsigned int)(rx_speed / 1000000U),
1229 (unsigned int)(tx_speed / 1000000U));
1231 netif_info(dev, link, dev->net,
1232 "%u kbit/s downlink %u kbit/s uplink\n",
1233 (unsigned int)(rx_speed / 1000U),
1234 (unsigned int)(tx_speed / 1000U));
1238 static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1240 struct cdc_ncm_ctx *ctx;
1241 struct usb_cdc_notification *event;
1243 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1245 if (urb->actual_length < sizeof(*event))
1248 /* test for split data in 8-byte chunks */
1249 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
1250 cdc_ncm_speed_change(dev,
1251 (struct usb_cdc_speed_change *)urb->transfer_buffer);
1255 event = urb->transfer_buffer;
1257 switch (event->bNotificationType) {
1258 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1260 * According to the CDC NCM specification ch.7.1
1261 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1262 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1264 ctx->connected = le16_to_cpu(event->wValue);
1265 netif_info(dev, link, dev->net,
1266 "network connection: %sconnected\n",
1267 ctx->connected ? "" : "dis");
1268 usbnet_link_change(dev, ctx->connected, 0);
1271 case USB_CDC_NOTIFY_SPEED_CHANGE:
1272 if (urb->actual_length < (sizeof(*event) +
1273 sizeof(struct usb_cdc_speed_change)))
1274 set_bit(EVENT_STS_SPLIT, &dev->flags);
1276 cdc_ncm_speed_change(dev,
1277 (struct usb_cdc_speed_change *)&event[1]);
1281 dev_dbg(&dev->udev->dev,
1282 "NCM: unexpected notification 0x%02x!\n",
1283 event->bNotificationType);
1288 static int cdc_ncm_check_connect(struct usbnet *dev)
1290 struct cdc_ncm_ctx *ctx;
1292 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1294 return 1; /* disconnected */
1296 return !ctx->connected;
1299 static const struct driver_info cdc_ncm_info = {
1300 .description = "CDC NCM",
1301 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
1302 .bind = cdc_ncm_bind,
1303 .unbind = cdc_ncm_unbind,
1304 .check_connect = cdc_ncm_check_connect,
1305 .manage_power = usbnet_manage_power,
1306 .status = cdc_ncm_status,
1307 .rx_fixup = cdc_ncm_rx_fixup,
1308 .tx_fixup = cdc_ncm_tx_fixup,
1311 /* Same as cdc_ncm_info, but with FLAG_WWAN */
1312 static const struct driver_info wwan_info = {
1313 .description = "Mobile Broadband Network Device",
1314 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1316 .bind = cdc_ncm_bind,
1317 .unbind = cdc_ncm_unbind,
1318 .check_connect = cdc_ncm_check_connect,
1319 .manage_power = usbnet_manage_power,
1320 .status = cdc_ncm_status,
1321 .rx_fixup = cdc_ncm_rx_fixup,
1322 .tx_fixup = cdc_ncm_tx_fixup,
1325 /* Same as wwan_info, but with FLAG_NOARP */
1326 static const struct driver_info wwan_noarp_info = {
1327 .description = "Mobile Broadband Network Device (NO ARP)",
1328 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1329 | FLAG_WWAN | FLAG_NOARP,
1330 .bind = cdc_ncm_bind,
1331 .unbind = cdc_ncm_unbind,
1332 .check_connect = cdc_ncm_check_connect,
1333 .manage_power = usbnet_manage_power,
1334 .status = cdc_ncm_status,
1335 .rx_fixup = cdc_ncm_rx_fixup,
1336 .tx_fixup = cdc_ncm_tx_fixup,
1339 static const struct usb_device_id cdc_devs[] = {
1340 /* Ericsson MBM devices like F5521gw */
1341 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1342 | USB_DEVICE_ID_MATCH_VENDOR,
1344 .bInterfaceClass = USB_CLASS_COMM,
1345 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1346 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1347 .driver_info = (unsigned long) &wwan_info,
1350 /* Dell branded MBM devices like DW5550 */
1351 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1352 | USB_DEVICE_ID_MATCH_VENDOR,
1354 .bInterfaceClass = USB_CLASS_COMM,
1355 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1356 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1357 .driver_info = (unsigned long) &wwan_info,
1360 /* Toshiba branded MBM devices */
1361 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1362 | USB_DEVICE_ID_MATCH_VENDOR,
1364 .bInterfaceClass = USB_CLASS_COMM,
1365 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1366 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1367 .driver_info = (unsigned long) &wwan_info,
1370 /* tag Huawei devices as wwan */
1371 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
1373 USB_CDC_SUBCLASS_NCM,
1374 USB_CDC_PROTO_NONE),
1375 .driver_info = (unsigned long)&wwan_info,
1378 /* Infineon(now Intel) HSPA Modem platform */
1379 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
1381 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1382 .driver_info = (unsigned long)&wwan_noarp_info,
1385 /* Generic CDC-NCM devices */
1386 { USB_INTERFACE_INFO(USB_CLASS_COMM,
1387 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1388 .driver_info = (unsigned long)&cdc_ncm_info,
1393 MODULE_DEVICE_TABLE(usb, cdc_devs);
1395 static struct usb_driver cdc_ncm_driver = {
1397 .id_table = cdc_devs,
1398 .probe = usbnet_probe,
1399 .disconnect = usbnet_disconnect,
1400 .suspend = usbnet_suspend,
1401 .resume = usbnet_resume,
1402 .reset_resume = usbnet_resume,
1403 .supports_autosuspend = 1,
1404 .disable_hub_initiated_lpm = 1,
1407 module_usb_driver(cdc_ncm_driver);
1409 MODULE_AUTHOR("Hans Petter Selasky");
1410 MODULE_DESCRIPTION("USB CDC NCM host driver");
1411 MODULE_LICENSE("Dual BSD/GPL");