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  1. /*
  2. * Copyright (c) 2012 Smith Micro Software, Inc.
  3. * Copyright (c) 2012 Bjørn Mork <bjorn@mork.no>
  4. *
  5. * This driver is based on and reuse most of cdc_ncm, which is
  6. * Copyright (C) ST-Ericsson 2010-2012
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License
  10. * version 2 as published by the Free Software Foundation.
  11. */
  12.  
  13. #include <linux/module.h>
  14. #include <linux/netdevice.h>
  15. #include <linux/ethtool.h>
  16. #include <linux/if_vlan.h>
  17. #include <linux/ip.h>
  18. #include <linux/mii.h>
  19. #include <linux/usb.h>
  20. #include <linux/usb/cdc.h>
  21. #include <linux/usb/usbnet.h>
  22. #include <linux/usb/cdc-wdm.h>
  23. #include <linux/usb/cdc_ncm.h>
  24. #include <net/ipv6.h>
  25. #include <net/addrconf.h>
  26.  
  27. /* alternative VLAN for IP session 0 if not untagged */
  28. #define MBIM_IPS0_VID 4094
  29.  
  30. /* driver specific data - must match cdc_ncm usage */
  31. struct cdc_mbim_state {
  32. struct cdc_ncm_ctx *ctx;
  33. atomic_t pmcount;
  34. struct usb_driver *subdriver;
  35. unsigned long _unused;
  36. unsigned long flags;
  37. };
  38.  
  39. /* flags for the cdc_mbim_state.flags field */
  40. enum cdc_mbim_flags {
  41. FLAG_IPS0_VLAN = 1 << 0, /* IP session 0 is tagged */
  42. };
  43.  
  44. /* using a counter to merge subdriver requests with our own into a combined state */
  45. static int cdc_mbim_manage_power(struct usbnet *dev, int on)
  46. {
  47. struct cdc_mbim_state *info = (void *)&dev->data;
  48. int rv = 0;
  49.  
  50. dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d\n", __func__, atomic_read(&info->pmcount), on);
  51.  
  52. if ((on && atomic_add_return(1, &info->pmcount) == 1) || (!on && atomic_dec_and_test(&info->pmcount))) {
  53. /* need autopm_get/put here to ensure the usbcore sees the new value */
  54. rv = usb_autopm_get_interface(dev->intf);
  55. dev->intf->needs_remote_wakeup = on;
  56. if (!rv)
  57. usb_autopm_put_interface(dev->intf);
  58. }
  59. return 0;
  60. }
  61.  
  62. static int cdc_mbim_wdm_manage_power(struct usb_interface *intf, int status)
  63. {
  64. struct usbnet *dev = usb_get_intfdata(intf);
  65.  
  66. /* can be called while disconnecting */
  67. if (!dev)
  68. return 0;
  69.  
  70. return cdc_mbim_manage_power(dev, status);
  71. }
  72.  
  73. static int cdc_mbim_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
  74. {
  75. struct usbnet *dev = netdev_priv(netdev);
  76. struct cdc_mbim_state *info = (void *)&dev->data;
  77.  
  78. /* creation of this VLAN is a request to tag IP session 0 */
  79. if (vid == MBIM_IPS0_VID)
  80. info->flags |= FLAG_IPS0_VLAN;
  81. else
  82. if (vid >= 512) /* we don't map these to MBIM session */
  83. return -EINVAL;
  84. return 0;
  85. }
  86.  
  87. static int cdc_mbim_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
  88. {
  89. struct usbnet *dev = netdev_priv(netdev);
  90. struct cdc_mbim_state *info = (void *)&dev->data;
  91.  
  92. /* this is a request for an untagged IP session 0 */
  93. if (vid == MBIM_IPS0_VID)
  94. info->flags &= ~FLAG_IPS0_VLAN;
  95. return 0;
  96. }
  97.  
  98. static const struct net_device_ops cdc_mbim_netdev_ops = {
  99. .ndo_open = usbnet_open,
  100. .ndo_stop = usbnet_stop,
  101. .ndo_start_xmit = usbnet_start_xmit,
  102. .ndo_tx_timeout = usbnet_tx_timeout,
  103. .ndo_change_mtu = cdc_ncm_change_mtu,
  104. .ndo_set_mac_address = eth_mac_addr,
  105. .ndo_validate_addr = eth_validate_addr,
  106. .ndo_vlan_rx_add_vid = cdc_mbim_rx_add_vid,
  107. .ndo_vlan_rx_kill_vid = cdc_mbim_rx_kill_vid,
  108. };
  109.  
  110. /* Change the control interface altsetting and update the .driver_info
  111. * pointer if the matching entry after changing class codes points to
  112. * a different struct
  113. */
  114. static int cdc_mbim_set_ctrlalt(struct usbnet *dev, struct usb_interface *intf, u8 alt)
  115. {
  116. struct usb_driver *driver = to_usb_driver(intf->dev.driver);
  117. const struct usb_device_id *id;
  118. struct driver_info *info;
  119. int ret;
  120.  
  121. ret = usb_set_interface(dev->udev,
  122. intf->cur_altsetting->desc.bInterfaceNumber,
  123. alt);
  124. if (ret)
  125. return ret;
  126.  
  127. id = usb_match_id(intf, driver->id_table);
  128. if (!id)
  129. return -ENODEV;
  130.  
  131. info = (struct driver_info *)id->driver_info;
  132. if (info != dev->driver_info) {
  133. dev_dbg(&intf->dev, "driver_info updated to '%s'\n",
  134. info->description);
  135. dev->driver_info = info;
  136. }
  137. return 0;
  138. }
  139.  
  140. static int cdc_mbim_bind(struct usbnet *dev, struct usb_interface *intf)
  141. {
  142. struct cdc_ncm_ctx *ctx;
  143. struct usb_driver *subdriver = ERR_PTR(-ENODEV);
  144. int ret = -ENODEV;
  145. u8 data_altsetting = 1;
  146. struct cdc_mbim_state *info = (void *)&dev->data;
  147.  
  148. /* should we change control altsetting on a NCM/MBIM function? */
  149. if (cdc_ncm_select_altsetting(intf) == CDC_NCM_COMM_ALTSETTING_MBIM) {
  150. data_altsetting = CDC_NCM_DATA_ALTSETTING_MBIM;
  151. ret = cdc_mbim_set_ctrlalt(dev, intf, CDC_NCM_COMM_ALTSETTING_MBIM);
  152. if (ret)
  153. goto err;
  154. ret = -ENODEV;
  155. }
  156.  
  157. /* we will hit this for NCM/MBIM functions if prefer_mbim is false */
  158. if (!cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting))
  159. goto err;
  160.  
  161. ret = cdc_ncm_bind_common(dev, intf, data_altsetting, dev->driver_info->data);
  162. if (ret)
  163. goto err;
  164.  
  165. ctx = info->ctx;
  166.  
  167. /* The MBIM descriptor and the status endpoint are required */
  168. if (ctx->mbim_desc && dev->status)
  169. subdriver = usb_cdc_wdm_register(ctx->control,
  170. &dev->status->desc,
  171. le16_to_cpu(ctx->mbim_desc->wMaxControlMessage),
  172. cdc_mbim_wdm_manage_power);
  173. if (IS_ERR(subdriver)) {
  174. ret = PTR_ERR(subdriver);
  175. cdc_ncm_unbind(dev, intf);
  176. goto err;
  177. }
  178.  
  179. /* can't let usbnet use the interrupt endpoint */
  180. dev->status = NULL;
  181. info->subdriver = subdriver;
  182.  
  183. /* MBIM cannot do ARP */
  184. dev->net->flags |= IFF_NOARP;
  185.  
  186. /* no need to put the VLAN tci in the packet headers */
  187. dev->net->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_FILTER;
  188.  
  189. /* monitor VLAN additions and removals */
  190. dev->net->netdev_ops = &cdc_mbim_netdev_ops;
  191. err:
  192. return ret;
  193. }
  194.  
  195. static void cdc_mbim_unbind(struct usbnet *dev, struct usb_interface *intf)
  196. {
  197. struct cdc_mbim_state *info = (void *)&dev->data;
  198. struct cdc_ncm_ctx *ctx = info->ctx;
  199.  
  200. /* disconnect subdriver from control interface */
  201. if (info->subdriver && info->subdriver->disconnect)
  202. info->subdriver->disconnect(ctx->control);
  203. info->subdriver = NULL;
  204.  
  205. /* let NCM unbind clean up both control and data interface */
  206. cdc_ncm_unbind(dev, intf);
  207. }
  208.  
  209. /* verify that the ethernet protocol is IPv4 or IPv6 */
  210. static bool is_ip_proto(__be16 proto)
  211. {
  212. switch (proto) {
  213. case htons(ETH_P_IP):
  214. case htons(ETH_P_IPV6):
  215. return true;
  216. }
  217. return false;
  218. }
  219.  
  220. static struct sk_buff *cdc_mbim_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
  221. {
  222. struct sk_buff *skb_out;
  223. struct cdc_mbim_state *info = (void *)&dev->data;
  224. struct cdc_ncm_ctx *ctx = info->ctx;
  225. __le32 sign = cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN);
  226. u16 tci = 0;
  227. bool is_ip;
  228. u8 *c;
  229.  
  230. if (!ctx)
  231. goto error;
  232.  
  233. if (skb) {
  234. if (skb->len <= ETH_HLEN)
  235. goto error;
  236.  
  237. /* Some applications using e.g. packet sockets will
  238. * bypass the VLAN acceleration and create tagged
  239. * ethernet frames directly. We primarily look for
  240. * the accelerated out-of-band tag, but fall back if
  241. * required
  242. */
  243. skb_reset_mac_header(skb);
  244. if (vlan_get_tag(skb, &tci) < 0 && skb->len > VLAN_ETH_HLEN &&
  245. __vlan_get_tag(skb, &tci) == 0) {
  246. is_ip = is_ip_proto(vlan_eth_hdr(skb)->h_vlan_encapsulated_proto);
  247. skb_pull(skb, VLAN_ETH_HLEN);
  248. } else {
  249. is_ip = is_ip_proto(eth_hdr(skb)->h_proto);
  250. skb_pull(skb, ETH_HLEN);
  251. }
  252.  
  253. /* Is IP session <0> tagged too? */
  254. if (info->flags & FLAG_IPS0_VLAN) {
  255. /* drop all untagged packets */
  256. if (!tci)
  257. goto error;
  258. /* map MBIM_IPS0_VID to IPS<0> */
  259. if (tci == MBIM_IPS0_VID)
  260. tci = 0;
  261. }
  262.  
  263. /* mapping VLANs to MBIM sessions:
  264. * no tag => IPS session <0> if !FLAG_IPS0_VLAN
  265. * 1 - 255 => IPS session <vlanid>
  266. * 256 - 511 => DSS session <vlanid - 256>
  267. * 512 - 4093 => unsupported, drop
  268. * 4094 => IPS session <0> if FLAG_IPS0_VLAN
  269. */
  270.  
  271. switch (tci & 0x0f00) {
  272. case 0x0000: /* VLAN ID 0 - 255 */
  273. if (!is_ip)
  274. goto error;
  275. c = (u8 *)&sign;
  276. c[3] = tci;
  277. break;
  278. case 0x0100: /* VLAN ID 256 - 511 */
  279. if (is_ip)
  280. goto error;
  281. sign = cpu_to_le32(USB_CDC_MBIM_NDP16_DSS_SIGN);
  282. c = (u8 *)&sign;
  283. c[3] = tci;
  284. break;
  285. default:
  286. netif_err(dev, tx_err, dev->net,
  287. "unsupported tci=0x%04x\n", tci);
  288. goto error;
  289. }
  290. }
  291.  
  292. spin_lock_bh(&ctx->mtx);
  293. skb_out = cdc_ncm_fill_tx_frame(dev, skb, sign);
  294. spin_unlock_bh(&ctx->mtx);
  295. return skb_out;
  296.  
  297. error:
  298. if (skb)
  299. dev_kfree_skb_any(skb);
  300.  
  301. return NULL;
  302. }
  303.  
  304. /* Some devices are known to send Neigbor Solicitation messages and
  305. * require Neigbor Advertisement replies. The IPv6 core will not
  306. * respond since IFF_NOARP is set, so we must handle them ourselves.
  307. */
  308. static void do_neigh_solicit(struct usbnet *dev, u8 *buf, u16 tci)
  309. {
  310. struct ipv6hdr *iph = (void *)buf;
  311. struct nd_msg *msg = (void *)(iph + 1);
  312. struct net_device *netdev;
  313. struct inet6_dev *in6_dev;
  314. bool is_router;
  315.  
  316. /* we'll only respond to requests from unicast addresses to
  317. * our solicited node addresses.
  318. */
  319. if (!ipv6_addr_is_solict_mult(&iph->daddr) ||
  320. !(ipv6_addr_type(&iph->saddr) & IPV6_ADDR_UNICAST))
  321. return;
  322.  
  323. /* need to send the NA on the VLAN dev, if any */
  324. rcu_read_lock();
  325. if (tci) {
  326. netdev = __vlan_find_dev_deep_rcu(dev->net, htons(ETH_P_8021Q),
  327. tci);
  328. if (!netdev) {
  329. rcu_read_unlock();
  330. return;
  331. }
  332. } else {
  333. netdev = dev->net;
  334. }
  335. dev_hold(netdev);
  336. rcu_read_unlock();
  337.  
  338. in6_dev = in6_dev_get(netdev);
  339. if (!in6_dev)
  340. goto out;
  341. is_router = !!in6_dev->cnf.forwarding;
  342. in6_dev_put(in6_dev);
  343.  
  344. /* ipv6_stub != NULL if in6_dev_get returned an inet6_dev */
  345. ipv6_stub->ndisc_send_na(netdev, &iph->saddr, &msg->target,
  346. is_router /* router */,
  347. true /* solicited */,
  348. false /* override */,
  349. true /* inc_opt */);
  350. out:
  351. dev_put(netdev);
  352. }
  353.  
  354. static bool is_neigh_solicit(u8 *buf, size_t len)
  355. {
  356. struct ipv6hdr *iph = (void *)buf;
  357. struct nd_msg *msg = (void *)(iph + 1);
  358.  
  359. return (len >= sizeof(struct ipv6hdr) + sizeof(struct nd_msg) &&
  360. iph->nexthdr == IPPROTO_ICMPV6 &&
  361. msg->icmph.icmp6_code == 0 &&
  362. msg->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION);
  363. }
  364.  
  365.  
  366. static struct sk_buff *cdc_mbim_process_dgram(struct usbnet *dev, u8 *buf, size_t len, u16 tci)
  367. {
  368. __be16 proto = htons(ETH_P_802_3);
  369. struct sk_buff *skb = NULL;
  370.  
  371. if (tci < 256 || tci == MBIM_IPS0_VID) { /* IPS session? */
  372. if (len < sizeof(struct iphdr))
  373. goto err;
  374.  
  375. switch (*buf & 0xf0) {
  376. case 0x40:
  377. proto = htons(ETH_P_IP);
  378. break;
  379. case 0x60:
  380. if (is_neigh_solicit(buf, len))
  381. do_neigh_solicit(dev, buf, tci);
  382. proto = htons(ETH_P_IPV6);
  383. break;
  384. default:
  385. goto err;
  386. }
  387. }
  388.  
  389. skb = netdev_alloc_skb_ip_align(dev->net, len + ETH_HLEN);
  390. if (!skb)
  391. goto err;
  392.  
  393. /* add an ethernet header */
  394. skb_put(skb, ETH_HLEN);
  395. skb_reset_mac_header(skb);
  396. eth_hdr(skb)->h_proto = proto;
  397. eth_zero_addr(eth_hdr(skb)->h_source);
  398. memcpy(eth_hdr(skb)->h_dest, dev->net->dev_addr, ETH_ALEN);
  399.  
  400. /* add datagram */
  401. memcpy(skb_put(skb, len), buf, len);
  402.  
  403. /* map MBIM session to VLAN */
  404. if (tci)
  405. __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tci);
  406. err:
  407. return skb;
  408. }
  409.  
  410. static int cdc_mbim_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
  411. {
  412. struct sk_buff *skb;
  413. struct cdc_mbim_state *info = (void *)&dev->data;
  414. struct cdc_ncm_ctx *ctx = info->ctx;
  415. int len;
  416. int nframes;
  417. int x;
  418. int offset;
  419. struct usb_cdc_ncm_ndp16 *ndp16;
  420. struct usb_cdc_ncm_dpe16 *dpe16;
  421. int ndpoffset;
  422. int loopcount = 50; /* arbitrary max preventing infinite loop */
  423. u32 payload = 0;
  424. u8 *c;
  425. u16 tci;
  426.  
  427. ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
  428. if (ndpoffset < 0)
  429. goto error;
  430.  
  431. next_ndp:
  432. nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
  433. if (nframes < 0)
  434. goto error;
  435.  
  436. ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
  437.  
  438. switch (ndp16->dwSignature & cpu_to_le32(0x00ffffff)) {
  439. case cpu_to_le32(USB_CDC_MBIM_NDP16_IPS_SIGN):
  440. c = (u8 *)&ndp16->dwSignature;
  441. tci = c[3];
  442. /* tag IPS<0> packets too if MBIM_IPS0_VID exists */
  443. if (!tci && info->flags & FLAG_IPS0_VLAN)
  444. tci = MBIM_IPS0_VID;
  445. break;
  446. case cpu_to_le32(USB_CDC_MBIM_NDP16_DSS_SIGN):
  447. c = (u8 *)&ndp16->dwSignature;
  448. tci = c[3] + 256;
  449. break;
  450. default:
  451. netif_dbg(dev, rx_err, dev->net,
  452. "unsupported NDP signature <0x%08x>\n",
  453. le32_to_cpu(ndp16->dwSignature));
  454. goto err_ndp;
  455.  
  456. }
  457.  
  458. dpe16 = ndp16->dpe16;
  459. for (x = 0; x < nframes; x++, dpe16++) {
  460. offset = le16_to_cpu(dpe16->wDatagramIndex);
  461. len = le16_to_cpu(dpe16->wDatagramLength);
  462.  
  463. /*
  464. * CDC NCM ch. 3.7
  465. * All entries after first NULL entry are to be ignored
  466. */
  467. if ((offset == 0) || (len == 0)) {
  468. if (!x)
  469. goto err_ndp; /* empty NTB */
  470. break;
  471. }
  472.  
  473. /* sanity checking */
  474. if (((offset + len) > skb_in->len) || (len > ctx->rx_max)) {
  475. netif_dbg(dev, rx_err, dev->net,
  476. "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
  477. x, offset, len, skb_in);
  478. if (!x)
  479. goto err_ndp;
  480. break;
  481. } else {
  482. skb = cdc_mbim_process_dgram(dev, skb_in->data + offset, len, tci);
  483. if (!skb)
  484. goto error;
  485. usbnet_skb_return(dev, skb);
  486. payload += len; /* count payload bytes in this NTB */
  487. }
  488. }
  489. err_ndp:
  490. /* are there more NDPs to process? */
  491. ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
  492. if (ndpoffset && loopcount--)
  493. goto next_ndp;
  494.  
  495. /* update stats */
  496. ctx->rx_overhead += skb_in->len - payload;
  497. ctx->rx_ntbs++;
  498.  
  499. return 1;
  500. error:
  501. return 0;
  502. }
  503.  
  504. static int cdc_mbim_suspend(struct usb_interface *intf, pm_message_t message)
  505. {
  506. int ret = -ENODEV;
  507. struct usbnet *dev = usb_get_intfdata(intf);
  508. struct cdc_mbim_state *info = (void *)&dev->data;
  509. struct cdc_ncm_ctx *ctx = info->ctx;
  510.  
  511. if (!ctx)
  512. goto error;
  513.  
  514. /*
  515. * Both usbnet_suspend() and subdriver->suspend() MUST return 0
  516. * in system sleep context, otherwise, the resume callback has
  517. * to recover device from previous suspend failure.
  518. */
  519. ret = usbnet_suspend(intf, message);
  520. if (ret < 0)
  521. goto error;
  522.  
  523. if (intf == ctx->control && info->subdriver && info->subdriver->suspend)
  524. ret = info->subdriver->suspend(intf, message);
  525. if (ret < 0)
  526. usbnet_resume(intf);
  527.  
  528. error:
  529. return ret;
  530. }
  531.  
  532. static int cdc_mbim_resume(struct usb_interface *intf)
  533. {
  534. int ret = 0;
  535. struct usbnet *dev = usb_get_intfdata(intf);
  536. struct cdc_mbim_state *info = (void *)&dev->data;
  537. struct cdc_ncm_ctx *ctx = info->ctx;
  538. bool callsub = (intf == ctx->control && info->subdriver && info->subdriver->resume);
  539.  
  540. if (callsub)
  541. ret = info->subdriver->resume(intf);
  542. if (ret < 0)
  543. goto err;
  544. ret = usbnet_resume(intf);
  545. if (ret < 0 && callsub)
  546. info->subdriver->suspend(intf, PMSG_SUSPEND);
  547. err:
  548. return ret;
  549. }
  550.  
  551. static const struct driver_info cdc_mbim_info = {
  552. .description = "CDC MBIM",
  553. .flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN,
  554. .bind = cdc_mbim_bind,
  555. .unbind = cdc_mbim_unbind,
  556. .manage_power = cdc_mbim_manage_power,
  557. .rx_fixup = cdc_mbim_rx_fixup,
  558. .tx_fixup = cdc_mbim_tx_fixup,
  559. };
  560.  
  561. /* MBIM and NCM devices should not need a ZLP after NTBs with
  562. * dwNtbOutMaxSize length. Nevertheless, a number of devices from
  563. * different vendor IDs will fail unless we send ZLPs, forcing us
  564. * to make this the default.
  565. *
  566. * This default may cause a performance penalty for spec conforming
  567. * devices wanting to take advantage of optimizations possible without
  568. * ZLPs. A whitelist is added in an attempt to avoid this for devices
  569. * known to conform to the MBIM specification.
  570. *
  571. * All known devices supporting NCM compatibility mode are also
  572. * conforming to the NCM and MBIM specifications. For this reason, the
  573. * NCM subclass entry is also in the ZLP whitelist.
  574. */
  575. static const struct driver_info cdc_mbim_info_zlp = {
  576. .description = "CDC MBIM",
  577. .flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN | FLAG_SEND_ZLP,
  578. .bind = cdc_mbim_bind,
  579. .unbind = cdc_mbim_unbind,
  580. .manage_power = cdc_mbim_manage_power,
  581. .rx_fixup = cdc_mbim_rx_fixup,
  582. .tx_fixup = cdc_mbim_tx_fixup,
  583. };
  584.  
  585. /* The spefication explicitly allows NDPs to be placed anywhere in the
  586. * frame, but some devices fail unless the NDP is placed after the IP
  587. * packets. Using the CDC_NCM_FLAG_NDP_TO_END flags to force this
  588. * behaviour.
  589. *
  590. * Note: The current implementation of this feature restricts each NTB
  591. * to a single NDP, implying that multiplexed sessions cannot share an
  592. * NTB. This might affect performace for multiplexed sessions.
  593. */
  594. static const struct driver_info cdc_mbim_info_ndp_to_end = {
  595. .description = "CDC MBIM",
  596. .flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN,
  597. .bind = cdc_mbim_bind,
  598. .unbind = cdc_mbim_unbind,
  599. .manage_power = cdc_mbim_manage_power,
  600. .rx_fixup = cdc_mbim_rx_fixup,
  601. .tx_fixup = cdc_mbim_tx_fixup,
  602. .data = CDC_NCM_FLAG_NDP_TO_END,
  603. };
  604.  
  605. static const struct usb_device_id mbim_devs[] = {
  606. /* This duplicate NCM entry is intentional. MBIM devices can
  607. * be disguised as NCM by default, and this is necessary to
  608. * allow us to bind the correct driver_info to such devices.
  609. *
  610. * bind() will sort out this for us, selecting the correct
  611. * entry and reject the other
  612. */
  613. { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
  614. .driver_info = (unsigned long)&cdc_mbim_info,
  615. },
  616. /* ZLP conformance whitelist: All Ericsson MBIM devices */
  617. { USB_VENDOR_AND_INTERFACE_INFO(0x0bdb, USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
  618. .driver_info = (unsigned long)&cdc_mbim_info,
  619. },
  620. /* Huawei E3372 fails unless NDP comes after the IP packets */
  621. { USB_DEVICE_AND_INTERFACE_INFO(0x12d1, 0x157d, USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
  622. .driver_info = (unsigned long)&cdc_mbim_info_ndp_to_end,
  623. },
  624. /* Huawei KKKKK fails unless NDP comes after the IP packets */
  625. { USB_DEVICE_AND_INTERFACE_INFO(0x12d1, 0x1f1e, USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
  626. .driver_info = (unsigned long)&cdc_mbim_info_ndp_to_end,
  627. },
  628. /* default entry */
  629. { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_MBIM, USB_CDC_PROTO_NONE),
  630. .driver_info = (unsigned long)&cdc_mbim_info_zlp,
  631. },
  632. {
  633. },
  634. };
  635. MODULE_DEVICE_TABLE(usb, mbim_devs);
  636.  
  637. static struct usb_driver cdc_mbim_driver = {
  638. .name = "cdc_mbim",
  639. .id_table = mbim_devs,
  640. .probe = usbnet_probe,
  641. .disconnect = usbnet_disconnect,
  642. .suspend = cdc_mbim_suspend,
  643. .resume = cdc_mbim_resume,
  644. .reset_resume = cdc_mbim_resume,
  645. .supports_autosuspend = 1,
  646. .disable_hub_initiated_lpm = 1,
  647. };
  648. module_usb_driver(cdc_mbim_driver);
  649.  
  650. MODULE_AUTHOR("Greg Suarez <gsuarez@smithmicro.com>");
  651. MODULE_AUTHOR("Bjørn Mork <bjorn@mork.no>");
  652. MODULE_DESCRIPTION("USB CDC MBIM host driver");
  653. MODULE_LICENSE("GPL");
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