blob: c3e4da9e79ca071a06082e965a3aec5bb206a77e [file] [log] [blame]
Alexey Orishko900d4952010-11-29 23:23:28 +00001/*
2 * cdc_ncm.c
3 *
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00004 * Copyright (C) ST-Ericsson 2010-2012
Alexey Orishko900d4952010-11-29 23:23:28 +00005 * Contact: Alexey Orishko <alexey.orishko@stericsson.com>
6 * Original author: Hans Petter Selasky <hans.petter.selasky@stericsson.com>
7 *
8 * USB Host Driver for Network Control Model (NCM)
9 * http://www.usb.org/developers/devclass_docs/NCM10.zip
10 *
11 * The NCM encoding, decoding and initialization logic
12 * derives from FreeBSD 8.x. if_cdce.c and if_cdcereg.h
13 *
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:
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
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.
27 *
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
38 * SUCH DAMAGE.
39 */
40
41#include <linux/module.h>
Alexey Orishko900d4952010-11-29 23:23:28 +000042#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>
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +000049#include <linux/hrtimer.h>
Alexey Orishko900d4952010-11-29 23:23:28 +000050#include <linux/atomic.h>
51#include <linux/usb/usbnet.h>
52#include <linux/usb/cdc.h>
Bjørn Morkc91ce3b2012-10-22 10:56:35 +000053#include <linux/usb/cdc_ncm.h>
Alexey Orishko900d4952010-11-29 23:23:28 +000054
Bjørn Mork1e8bbe62013-03-14 01:05:13 +000055#if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM)
56static bool prefer_mbim = true;
57#else
58static bool prefer_mbim;
59#endif
60module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR);
61MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions");
62
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +000063static void cdc_ncm_txpath_bh(unsigned long param);
64static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx);
65static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer);
Alexey Orishko900d4952010-11-29 23:23:28 +000066static struct usb_driver cdc_ncm_driver;
Alexey Orishko900d4952010-11-29 23:23:28 +000067
Bjørn Morkbeeecd42014-05-16 21:48:25 +020068struct cdc_ncm_stats {
69 char stat_string[ETH_GSTRING_LEN];
70 int sizeof_stat;
71 int stat_offset;
72};
73
74#define CDC_NCM_STAT(str, m) { \
75 .stat_string = str, \
76 .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \
77 .stat_offset = offsetof(struct cdc_ncm_ctx, m) }
78#define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m)
79
80static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = {
81 CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full),
82 CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full),
83 CDC_NCM_SIMPLE_STAT(tx_reason_timeout),
84 CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram),
85 CDC_NCM_SIMPLE_STAT(tx_overhead),
86 CDC_NCM_SIMPLE_STAT(tx_ntbs),
87 CDC_NCM_SIMPLE_STAT(rx_overhead),
88 CDC_NCM_SIMPLE_STAT(rx_ntbs),
89};
90
91static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset)
92{
93 switch (sset) {
94 case ETH_SS_STATS:
95 return ARRAY_SIZE(cdc_ncm_gstrings_stats);
96 default:
97 return -EOPNOTSUPP;
98 }
99}
100
101static void cdc_ncm_get_ethtool_stats(struct net_device *netdev,
102 struct ethtool_stats __always_unused *stats,
103 u64 *data)
104{
105 struct usbnet *dev = netdev_priv(netdev);
106 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
107 int i;
108 char *p = NULL;
109
110 for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) {
111 p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset;
112 data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
113 }
114}
115
116static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data)
117{
118 u8 *p = data;
119 int i;
120
121 switch (stringset) {
122 case ETH_SS_STATS:
123 for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) {
124 memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN);
125 p += ETH_GSTRING_LEN;
126 }
127 }
128}
129
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200130static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx);
131
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200132static const struct ethtool_ops cdc_ncm_ethtool_ops = {
133 .get_settings = usbnet_get_settings,
134 .set_settings = usbnet_set_settings,
135 .get_link = usbnet_get_link,
136 .nway_reset = usbnet_nway_reset,
137 .get_drvinfo = usbnet_get_drvinfo,
138 .get_msglevel = usbnet_get_msglevel,
139 .set_msglevel = usbnet_set_msglevel,
140 .get_ts_info = ethtool_op_get_ts_info,
Bjørn Morkbeeecd42014-05-16 21:48:25 +0200141 .get_sset_count = cdc_ncm_get_sset_count,
142 .get_strings = cdc_ncm_get_strings,
143 .get_ethtool_stats = cdc_ncm_get_ethtool_stats,
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200144};
145
Bjørn Mork289507d2014-05-30 09:31:06 +0200146static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx)
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200147{
148 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200149 u32 val, max, min;
150
151 /* clamp new_rx to sane values */
152 min = USB_CDC_NCM_NTB_MIN_IN_SIZE;
153 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
154
155 /* dwNtbInMaxSize spec violation? Use MIN size for both limits */
156 if (max < min) {
157 dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n",
158 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min);
159 max = min;
160 }
161
162 val = clamp_t(u32, new_rx, min, max);
Bjørn Mork289507d2014-05-30 09:31:06 +0200163 if (val != new_rx)
164 dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max);
165
166 return val;
167}
168
169static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx)
170{
171 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
172 u32 val, max, min;
173
174 /* clamp new_tx to sane values */
175 min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16);
176 max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
177
178 /* some devices set dwNtbOutMaxSize too low for the above default */
179 min = min(min, max);
180
181 val = clamp_t(u32, new_tx, min, max);
182 if (val != new_tx)
183 dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max);
184
185 return val;
186}
187
Bjørn Mork39eb7e02014-05-30 09:31:09 +0200188static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf)
189{
190 struct usbnet *dev = netdev_priv(to_net_dev(d));
191 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
192
193 return sprintf(buf, "%u\n", ctx->min_tx_pkt);
194}
195
Bjørn Mork289507d2014-05-30 09:31:06 +0200196static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf)
197{
198 struct usbnet *dev = netdev_priv(to_net_dev(d));
199 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
200
201 return sprintf(buf, "%u\n", ctx->rx_max);
202}
203
204static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf)
205{
206 struct usbnet *dev = netdev_priv(to_net_dev(d));
207 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
208
209 return sprintf(buf, "%u\n", ctx->tx_max);
210}
211
212static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf)
213{
214 struct usbnet *dev = netdev_priv(to_net_dev(d));
215 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
216
217 return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC);
218}
219
Bjørn Mork39eb7e02014-05-30 09:31:09 +0200220static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
221{
222 struct usbnet *dev = netdev_priv(to_net_dev(d));
223 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
224 unsigned long val;
225
226 /* no need to restrict values - anything from 0 to infinity is OK */
227 if (kstrtoul(buf, 0, &val))
228 return -EINVAL;
229
230 ctx->min_tx_pkt = val;
231 return len;
232}
233
Bjørn Mork289507d2014-05-30 09:31:06 +0200234static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
235{
236 struct usbnet *dev = netdev_priv(to_net_dev(d));
237 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
238 unsigned long val;
239
240 if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val)
241 return -EINVAL;
242
243 cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max);
244 return len;
245}
246
247static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
248{
249 struct usbnet *dev = netdev_priv(to_net_dev(d));
250 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
251 unsigned long val;
252
253 if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val)
254 return -EINVAL;
255
256 cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val);
257 return len;
258}
259
260static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len)
261{
262 struct usbnet *dev = netdev_priv(to_net_dev(d));
263 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
264 ssize_t ret;
265 unsigned long val;
266
267 ret = kstrtoul(buf, 0, &val);
268 if (ret)
269 return ret;
270 if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX))
271 return -EINVAL;
272
273 spin_lock_bh(&ctx->mtx);
274 ctx->timer_interval = val * NSEC_PER_USEC;
275 if (!ctx->timer_interval)
276 ctx->tx_timer_pending = 0;
277 spin_unlock_bh(&ctx->mtx);
278 return len;
279}
280
Bjørn Mork39eb7e02014-05-30 09:31:09 +0200281static DEVICE_ATTR(min_tx_pkt, S_IRUGO | S_IWUSR, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt);
Bjørn Mork289507d2014-05-30 09:31:06 +0200282static DEVICE_ATTR(rx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max);
283static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max);
284static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs);
285
Bjørn Mork871578c2014-05-30 09:31:08 +0200286#define NCM_PARM_ATTR(name, format, tocpu) \
287static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \
288{ \
289 struct usbnet *dev = netdev_priv(to_net_dev(d)); \
290 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \
291 return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \
292} \
293static DEVICE_ATTR(name, S_IRUGO, cdc_ncm_show_##name, NULL)
294
295NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu);
296NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu);
297NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu);
298NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu);
299NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu);
300NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu);
301NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu);
302NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu);
303NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu);
304NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu);
305
Bjørn Mork289507d2014-05-30 09:31:06 +0200306static struct attribute *cdc_ncm_sysfs_attrs[] = {
Bjørn Mork39eb7e02014-05-30 09:31:09 +0200307 &dev_attr_min_tx_pkt.attr,
Bjørn Mork289507d2014-05-30 09:31:06 +0200308 &dev_attr_rx_max.attr,
309 &dev_attr_tx_max.attr,
310 &dev_attr_tx_timer_usecs.attr,
Bjørn Mork871578c2014-05-30 09:31:08 +0200311 &dev_attr_bmNtbFormatsSupported.attr,
312 &dev_attr_dwNtbInMaxSize.attr,
313 &dev_attr_wNdpInDivisor.attr,
314 &dev_attr_wNdpInPayloadRemainder.attr,
315 &dev_attr_wNdpInAlignment.attr,
316 &dev_attr_dwNtbOutMaxSize.attr,
317 &dev_attr_wNdpOutDivisor.attr,
318 &dev_attr_wNdpOutPayloadRemainder.attr,
319 &dev_attr_wNdpOutAlignment.attr,
320 &dev_attr_wNtbOutMaxDatagrams.attr,
Bjørn Mork289507d2014-05-30 09:31:06 +0200321 NULL,
322};
323
324static struct attribute_group cdc_ncm_sysfs_attr_group = {
325 .name = "cdc_ncm",
326 .attrs = cdc_ncm_sysfs_attrs,
327};
328
329/* handle rx_max and tx_max changes */
330static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx)
331{
332 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
333 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
334 u32 val;
335
336 val = cdc_ncm_check_rx_max(dev, new_rx);
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200337
338 /* inform device about NTB input size changes */
339 if (val != ctx->rx_max) {
340 __le32 dwNtbInMaxSize = cpu_to_le32(val);
341
342 dev_info(&dev->intf->dev, "setting rx_max = %u\n", val);
Bjørn Mork68864ab2014-05-16 21:48:21 +0200343
Bjørn Mork68864ab2014-05-16 21:48:21 +0200344 /* tell device to use new size */
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200345 if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE,
346 USB_TYPE_CLASS | USB_DIR_OUT
347 | USB_RECIP_INTERFACE,
348 0, iface_no, &dwNtbInMaxSize, 4) < 0)
349 dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n");
350 else
351 ctx->rx_max = val;
352 }
353
Bjørn Morkf42763d2014-05-30 09:31:05 +0200354 /* usbnet use these values for sizing rx queues */
355 if (dev->rx_urb_size != ctx->rx_max) {
356 dev->rx_urb_size = ctx->rx_max;
357 if (netif_running(dev->net))
358 usbnet_unlink_rx_urbs(dev);
359 }
360
Bjørn Mork289507d2014-05-30 09:31:06 +0200361 val = cdc_ncm_check_tx_max(dev, new_tx);
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200362 if (val != ctx->tx_max)
363 dev_info(&dev->intf->dev, "setting tx_max = %u\n", val);
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200364
365 /* Adding a pad byte here if necessary simplifies the handling
366 * in cdc_ncm_fill_tx_frame, making tx_max always represent
367 * the real skb max size.
368 *
369 * We cannot use dev->maxpacket here because this is called from
370 * .bind which is called before usbnet sets up dev->maxpacket
371 */
Bjørn Mork68864ab2014-05-16 21:48:21 +0200372 if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) &&
373 val % usb_maxpacket(dev->udev, dev->out, 1) == 0)
374 val++;
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200375
Bjørn Mork68864ab2014-05-16 21:48:21 +0200376 /* we might need to flush any pending tx buffers if running */
377 if (netif_running(dev->net) && val > ctx->tx_max) {
378 netif_tx_lock_bh(dev->net);
379 usbnet_start_xmit(NULL, dev->net);
Bjørn Mork1ba5d0f2014-05-30 09:31:04 +0200380 /* make sure tx_curr_skb is reallocated if it was empty */
381 if (ctx->tx_curr_skb) {
382 dev_kfree_skb_any(ctx->tx_curr_skb);
383 ctx->tx_curr_skb = NULL;
384 }
Bjørn Mork68864ab2014-05-16 21:48:21 +0200385 ctx->tx_max = val;
386 netif_tx_unlock_bh(dev->net);
387 } else {
388 ctx->tx_max = val;
389 }
390
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200391 dev->hard_mtu = ctx->tx_max;
Bjørn Mork68864ab2014-05-16 21:48:21 +0200392
393 /* max qlen depend on hard_mtu and rx_urb_size */
394 usbnet_update_max_qlen(dev);
Bjørn Mork43e4c6d2014-05-16 21:48:24 +0200395
396 /* never pad more than 3 full USB packets per transfer */
397 ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1),
398 CDC_NCM_MIN_TX_PKT, ctx->tx_max);
Bjørn Mork5aa73d52014-05-16 21:48:18 +0200399}
400
Bjørn Morkf8afb732014-05-16 21:48:19 +0200401/* helpers for NCM and MBIM differences */
402static u8 cdc_ncm_flags(struct usbnet *dev)
Alexey Orishko900d4952010-11-29 23:23:28 +0000403{
Bjørn Morkbed6f762013-11-01 11:16:42 +0100404 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexey Orishko900d4952010-11-29 23:23:28 +0000405
Bjørn Morkf8afb732014-05-16 21:48:19 +0200406 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
407 return ctx->mbim_desc->bmNetworkCapabilities;
408 if (ctx->func_desc)
409 return ctx->func_desc->bmNetworkCapabilities;
410 return 0;
411}
412
413static int cdc_ncm_eth_hlen(struct usbnet *dev)
414{
415 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
416 return 0;
417 return ETH_HLEN;
418}
419
420static u32 cdc_ncm_min_dgram_size(struct usbnet *dev)
421{
422 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting))
423 return CDC_MBIM_MIN_DATAGRAM_SIZE;
424 return CDC_NCM_MIN_DATAGRAM_SIZE;
425}
426
427static u32 cdc_ncm_max_dgram_size(struct usbnet *dev)
428{
429 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
430
431 if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc)
432 return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize);
433 if (ctx->ether_desc)
434 return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize);
435 return CDC_NCM_MAX_DATAGRAM_SIZE;
436}
437
438/* initial one-time device setup. MUST be called with the data interface
439 * in altsetting 0
440 */
441static int cdc_ncm_init(struct usbnet *dev)
442{
443 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
444 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
445 int err;
Alexey Orishko900d4952010-11-29 23:23:28 +0000446
Ming Lei90b8b032012-10-24 19:46:56 +0000447 err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS,
448 USB_TYPE_CLASS | USB_DIR_IN
449 |USB_RECIP_INTERFACE,
Bjørn Morkff0992e92014-03-17 16:25:18 +0100450 0, iface_no, &ctx->ncm_parm,
451 sizeof(ctx->ncm_parm));
Giuseppe Scrivano36c35412011-08-03 22:10:29 +0000452 if (err < 0) {
Bjørn Mork59ede312013-11-01 11:16:59 +0100453 dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n");
454 return err; /* GET_NTB_PARAMETERS is required */
Alexey Orishko900d4952010-11-29 23:23:28 +0000455 }
456
Bjørn Morkf8afb732014-05-16 21:48:19 +0200457 /* set CRC Mode */
458 if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) {
459 dev_dbg(&dev->intf->dev, "Setting CRC mode off\n");
460 err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE,
461 USB_TYPE_CLASS | USB_DIR_OUT
462 | USB_RECIP_INTERFACE,
463 USB_CDC_NCM_CRC_NOT_APPENDED,
464 iface_no, NULL, 0);
465 if (err < 0)
466 dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n");
467 }
468
469 /* set NTB format, if both formats are supported.
470 *
471 * "The host shall only send this command while the NCM Data
472 * Interface is in alternate setting 0."
473 */
Dan Carpenterd22adbf2014-05-22 10:52:29 +0300474 if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) &
475 USB_CDC_NCM_NTB32_SUPPORTED) {
Bjørn Morkf8afb732014-05-16 21:48:19 +0200476 dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n");
477 err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
478 USB_TYPE_CLASS | USB_DIR_OUT
479 | USB_RECIP_INTERFACE,
480 USB_CDC_NCM_NTB16_FORMAT,
481 iface_no, NULL, 0);
482 if (err < 0)
483 dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n");
484 }
485
486 /* set initial device values */
Bjørn Morkff0992e92014-03-17 16:25:18 +0100487 ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
488 ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize);
489 ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder);
490 ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor);
491 ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment);
Alexey Orishko84e77a82011-02-07 09:45:10 +0000492 /* devices prior to NCM Errata shall set this field to zero */
Bjørn Morkff0992e92014-03-17 16:25:18 +0100493 ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams);
Bjørn Mork47175e52013-11-01 11:16:58 +0100494
Bjørn Morkae223cd2013-11-01 11:16:54 +0100495 dev_dbg(&dev->intf->dev,
496 "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n",
497 ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus,
Bjørn Morkf8afb732014-05-16 21:48:19 +0200498 ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev));
Alexey Orishko900d4952010-11-29 23:23:28 +0000499
Alexey Orishko84e77a82011-02-07 09:45:10 +0000500 /* max count of tx datagrams */
501 if ((ctx->tx_max_datagrams == 0) ||
502 (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX))
503 ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX;
Alexey Orishko900d4952010-11-29 23:23:28 +0000504
Bjørn Mork70559b82014-05-16 21:48:23 +0200505 /* set up maximum NDP size */
506 ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16);
507
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200508 /* initial coalescing timer interval */
509 ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC;
510
Bjørn Morkf8afb732014-05-16 21:48:19 +0200511 return 0;
512}
513
514/* set a new max datagram size */
515static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size)
516{
517 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
518 u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber;
519 __le16 max_datagram_size;
520 u16 mbim_mtu;
521 int err;
522
523 /* set default based on descriptors */
524 ctx->max_datagram_size = clamp_t(u32, new_size,
525 cdc_ncm_min_dgram_size(dev),
526 CDC_NCM_MAX_DATAGRAM_SIZE);
527
528 /* inform the device about the selected Max Datagram Size? */
529 if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE))
530 goto out;
531
532 /* read current mtu value from device */
533 err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE,
534 USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
535 0, iface_no, &max_datagram_size, 2);
536 if (err < 0) {
537 dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n");
538 goto out;
539 }
540
541 if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size)
542 goto out;
543
544 max_datagram_size = cpu_to_le16(ctx->max_datagram_size);
545 err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE,
546 USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE,
547 0, iface_no, &max_datagram_size, 2);
548 if (err < 0)
549 dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n");
550
551out:
552 /* set MTU to max supported by the device if necessary */
553 dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev));
554
555 /* do not exceed operater preferred MTU */
556 if (ctx->mbim_extended_desc) {
557 mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU);
558 if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu)
559 dev->net->mtu = mbim_mtu;
560 }
561}
562
563static void cdc_ncm_fix_modulus(struct usbnet *dev)
564{
565 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
566 u32 val;
Alexey Orishko900d4952010-11-29 23:23:28 +0000567
568 /*
569 * verify that the structure alignment is:
570 * - power of two
571 * - not greater than the maximum transmit length
572 * - not less than four bytes
573 */
574 val = ctx->tx_ndp_modulus;
575
576 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
577 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
Bjørn Morkae223cd2013-11-01 11:16:54 +0100578 dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000579 ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
580 }
581
582 /*
583 * verify that the payload alignment is:
584 * - power of two
585 * - not greater than the maximum transmit length
586 * - not less than four bytes
587 */
588 val = ctx->tx_modulus;
589
590 if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) ||
591 (val != ((-val) & val)) || (val >= ctx->tx_max)) {
Bjørn Morkae223cd2013-11-01 11:16:54 +0100592 dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000593 ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE;
594 }
595
596 /* verify the payload remainder */
597 if (ctx->tx_remainder >= ctx->tx_modulus) {
Bjørn Morkae223cd2013-11-01 11:16:54 +0100598 dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000599 ctx->tx_remainder = 0;
600 }
601
602 /* adjust TX-remainder according to NCM specification. */
Bjørn Morkf8afb732014-05-16 21:48:19 +0200603 ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) &
Greg Suarez2d1c4312012-10-22 10:56:30 +0000604 (ctx->tx_modulus - 1));
Bjørn Morkf8afb732014-05-16 21:48:19 +0200605}
Alexey Orishko900d4952010-11-29 23:23:28 +0000606
Bjørn Morkf8afb732014-05-16 21:48:19 +0200607static int cdc_ncm_setup(struct usbnet *dev)
608{
609 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Bjørn Mork50f1cb12014-05-16 21:48:26 +0200610 u32 def_rx, def_tx;
611
612 /* be conservative when selecting intial buffer size to
613 * increase the number of hosts this will work for
614 */
615 def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX,
616 le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize));
617 def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX,
618 le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
Alexey Orishko900d4952010-11-29 23:23:28 +0000619
Bjørn Morkf8afb732014-05-16 21:48:19 +0200620 /* clamp rx_max and tx_max and inform device */
Bjørn Mork50f1cb12014-05-16 21:48:26 +0200621 cdc_ncm_update_rxtx_max(dev, def_rx, def_tx);
Alexey Orishko84e77a82011-02-07 09:45:10 +0000622
Bjørn Morkf8afb732014-05-16 21:48:19 +0200623 /* sanitize the modulus and remainder values */
624 cdc_ncm_fix_modulus(dev);
Alexey Orishko900d4952010-11-29 23:23:28 +0000625
Bjørn Morkf8afb732014-05-16 21:48:19 +0200626 /* set max datagram size */
627 cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev));
Alexey Orishko900d4952010-11-29 23:23:28 +0000628 return 0;
629}
630
631static void
Bjørn Morkff1632a2013-11-01 11:16:41 +0100632cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf)
Alexey Orishko900d4952010-11-29 23:23:28 +0000633{
Bjørn Morkff1632a2013-11-01 11:16:41 +0100634 struct usb_host_endpoint *e, *in = NULL, *out = NULL;
Alexey Orishko900d4952010-11-29 23:23:28 +0000635 u8 ep;
636
637 for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) {
638
639 e = intf->cur_altsetting->endpoint + ep;
640 switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
641 case USB_ENDPOINT_XFER_INT:
642 if (usb_endpoint_dir_in(&e->desc)) {
Bjørn Morkff1632a2013-11-01 11:16:41 +0100643 if (!dev->status)
644 dev->status = e;
Alexey Orishko900d4952010-11-29 23:23:28 +0000645 }
646 break;
647
648 case USB_ENDPOINT_XFER_BULK:
649 if (usb_endpoint_dir_in(&e->desc)) {
Bjørn Morkff1632a2013-11-01 11:16:41 +0100650 if (!in)
651 in = e;
Alexey Orishko900d4952010-11-29 23:23:28 +0000652 } else {
Bjørn Morkff1632a2013-11-01 11:16:41 +0100653 if (!out)
654 out = e;
Alexey Orishko900d4952010-11-29 23:23:28 +0000655 }
656 break;
657
658 default:
659 break;
660 }
661 }
Bjørn Morkff1632a2013-11-01 11:16:41 +0100662 if (in && !dev->in)
663 dev->in = usb_rcvbulkpipe(dev->udev,
664 in->desc.bEndpointAddress &
665 USB_ENDPOINT_NUMBER_MASK);
666 if (out && !dev->out)
667 dev->out = usb_sndbulkpipe(dev->udev,
668 out->desc.bEndpointAddress &
669 USB_ENDPOINT_NUMBER_MASK);
Alexey Orishko900d4952010-11-29 23:23:28 +0000670}
671
672static void cdc_ncm_free(struct cdc_ncm_ctx *ctx)
673{
674 if (ctx == NULL)
675 return;
676
Alexey Orishko900d4952010-11-29 23:23:28 +0000677 if (ctx->tx_rem_skb != NULL) {
678 dev_kfree_skb_any(ctx->tx_rem_skb);
679 ctx->tx_rem_skb = NULL;
680 }
681
682 if (ctx->tx_curr_skb != NULL) {
683 dev_kfree_skb_any(ctx->tx_curr_skb);
684 ctx->tx_curr_skb = NULL;
685 }
686
687 kfree(ctx);
688}
689
Bjørn Morkc91ce3b2012-10-22 10:56:35 +0000690int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting)
Alexey Orishko900d4952010-11-29 23:23:28 +0000691{
Bjørn Mork83292232013-11-01 11:16:47 +0100692 const struct usb_cdc_union_desc *union_desc = NULL;
Alexey Orishko900d4952010-11-29 23:23:28 +0000693 struct cdc_ncm_ctx *ctx;
694 struct usb_driver *driver;
695 u8 *buf;
696 int len;
697 int temp;
698 u8 iface_no;
699
Thomas Meyerc7969842011-11-17 12:43:40 +0000700 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
Devendra Naga8f0923c2013-03-29 23:03:22 +0000701 if (!ctx)
702 return -ENOMEM;
Alexey Orishko900d4952010-11-29 23:23:28 +0000703
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +0000704 hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
705 ctx->tx_timer.function = &cdc_ncm_tx_timer_cb;
Bjørn Morkbed6f762013-11-01 11:16:42 +0100706 ctx->bh.data = (unsigned long)dev;
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +0000707 ctx->bh.func = cdc_ncm_txpath_bh;
708 atomic_set(&ctx->stop, 0);
Alexey Orishko900d4952010-11-29 23:23:28 +0000709 spin_lock_init(&ctx->mtx);
Alexey Orishko900d4952010-11-29 23:23:28 +0000710
711 /* store ctx pointer in device data field */
712 dev->data[0] = (unsigned long)ctx;
713
Bjørn Mork9fe02342013-11-01 11:16:48 +0100714 /* only the control interface can be successfully probed */
715 ctx->control = intf;
716
Alexey Orishko900d4952010-11-29 23:23:28 +0000717 /* get some pointers */
718 driver = driver_of(intf);
719 buf = intf->cur_altsetting->extra;
720 len = intf->cur_altsetting->extralen;
721
Alexey Orishko900d4952010-11-29 23:23:28 +0000722 /* parse through descriptors associated with control interface */
723 while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) {
724
725 if (buf[1] != USB_DT_CS_INTERFACE)
726 goto advance;
727
728 switch (buf[2]) {
729 case USB_CDC_UNION_TYPE:
Bjørn Mork83292232013-11-01 11:16:47 +0100730 if (buf[0] < sizeof(*union_desc))
Alexey Orishko900d4952010-11-29 23:23:28 +0000731 break;
732
Bjørn Mork83292232013-11-01 11:16:47 +0100733 union_desc = (const struct usb_cdc_union_desc *)buf;
Bjørn Mork9fe02342013-11-01 11:16:48 +0100734 /* the master must be the interface we are probing */
735 if (intf->cur_altsetting->desc.bInterfaceNumber !=
Bjørn Mork296e81f2013-11-01 11:17:00 +0100736 union_desc->bMasterInterface0) {
737 dev_dbg(&intf->dev, "bogus CDC Union\n");
Bjørn Mork9fe02342013-11-01 11:16:48 +0100738 goto error;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100739 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000740 ctx->data = usb_ifnum_to_if(dev->udev,
Bjørn Mork83292232013-11-01 11:16:47 +0100741 union_desc->bSlaveInterface0);
Alexey Orishko900d4952010-11-29 23:23:28 +0000742 break;
743
744 case USB_CDC_ETHERNET_TYPE:
745 if (buf[0] < sizeof(*(ctx->ether_desc)))
746 break;
747
748 ctx->ether_desc =
749 (const struct usb_cdc_ether_desc *)buf;
Alexey Orishko900d4952010-11-29 23:23:28 +0000750 break;
751
752 case USB_CDC_NCM_TYPE:
753 if (buf[0] < sizeof(*(ctx->func_desc)))
754 break;
755
756 ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf;
757 break;
758
Greg Suarez38396e42012-10-22 10:56:31 +0000759 case USB_CDC_MBIM_TYPE:
760 if (buf[0] < sizeof(*(ctx->mbim_desc)))
761 break;
762
763 ctx->mbim_desc = (const struct usb_cdc_mbim_desc *)buf;
764 break;
765
Ben Chan259fef02014-03-19 14:00:06 -0700766 case USB_CDC_MBIM_EXTENDED_TYPE:
767 if (buf[0] < sizeof(*(ctx->mbim_extended_desc)))
768 break;
769
770 ctx->mbim_extended_desc =
771 (const struct usb_cdc_mbim_extended_desc *)buf;
772 break;
773
Alexey Orishko900d4952010-11-29 23:23:28 +0000774 default:
775 break;
776 }
777advance:
778 /* advance to next descriptor */
779 temp = buf[0];
780 buf += temp;
781 len -= temp;
782 }
783
Bjørn Mork9992c2e2013-01-21 05:50:38 +0000784 /* some buggy devices have an IAD but no CDC Union */
Bjørn Mork83292232013-11-01 11:16:47 +0100785 if (!union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) {
Bjørn Mork56a666d2013-01-25 23:36:59 +0000786 ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1);
787 dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n");
Bjørn Mork9992c2e2013-01-21 05:50:38 +0000788 }
789
Alexey Orishko900d4952010-11-29 23:23:28 +0000790 /* check if we got everything */
Bjørn Morkf8afb732014-05-16 21:48:19 +0200791 if (!ctx->data) {
792 dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000793 goto error;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100794 }
Bjørn Morkf8afb732014-05-16 21:48:19 +0200795 if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) {
796 if (!ctx->mbim_desc) {
797 dev_dbg(&intf->dev, "MBIM functional descriptor missing\n");
798 goto error;
799 }
800 } else {
801 if (!ctx->ether_desc || !ctx->func_desc) {
802 dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n");
803 goto error;
804 }
805 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000806
Bjørn Morkbbc8d922012-11-13 03:19:43 +0000807 /* claim data interface, if different from control */
808 if (ctx->data != ctx->control) {
809 temp = usb_driver_claim_interface(driver, ctx->data, dev);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100810 if (temp) {
811 dev_dbg(&intf->dev, "failed to claim data intf\n");
Bjørn Morkbbc8d922012-11-13 03:19:43 +0000812 goto error;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100813 }
Bjørn Morkbbc8d922012-11-13 03:19:43 +0000814 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000815
816 iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber;
817
818 /* reset data interface */
819 temp = usb_set_interface(dev->udev, iface_no, 0);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100820 if (temp) {
821 dev_dbg(&intf->dev, "set interface failed\n");
Alexey Orishko19694ac2011-05-24 05:26:13 +0000822 goto error2;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100823 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000824
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200825 /* initialize basic device settings */
826 if (cdc_ncm_init(dev))
Bjørn Morkff0992e92014-03-17 16:25:18 +0100827 goto error2;
828
Alexey Orishko900d4952010-11-29 23:23:28 +0000829 /* configure data interface */
Greg Suarez38396e42012-10-22 10:56:31 +0000830 temp = usb_set_interface(dev->udev, iface_no, data_altsetting);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100831 if (temp) {
832 dev_dbg(&intf->dev, "set interface failed\n");
Alexey Orishko19694ac2011-05-24 05:26:13 +0000833 goto error2;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100834 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000835
Bjørn Morkff1632a2013-11-01 11:16:41 +0100836 cdc_ncm_find_endpoints(dev, ctx->data);
837 cdc_ncm_find_endpoints(dev, ctx->control);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100838 if (!dev->in || !dev->out || !dev->status) {
839 dev_dbg(&intf->dev, "failed to collect endpoints\n");
Alexey Orishko19694ac2011-05-24 05:26:13 +0000840 goto error2;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100841 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000842
Alexey Orishko900d4952010-11-29 23:23:28 +0000843 usb_set_intfdata(ctx->data, dev);
844 usb_set_intfdata(ctx->control, dev);
Alexey Orishko900d4952010-11-29 23:23:28 +0000845
Greg Suarez38396e42012-10-22 10:56:31 +0000846 if (ctx->ether_desc) {
847 temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress);
Bjørn Mork296e81f2013-11-01 11:17:00 +0100848 if (temp) {
849 dev_dbg(&intf->dev, "failed to get mac address\n");
Greg Suarez38396e42012-10-22 10:56:31 +0000850 goto error2;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100851 }
852 dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr);
Greg Suarez38396e42012-10-22 10:56:31 +0000853 }
Alexey Orishko900d4952010-11-29 23:23:28 +0000854
Bjørn Mork08c74fc2014-05-16 21:48:20 +0200855 /* finish setting up the device specific data */
856 cdc_ncm_setup(dev);
Bjørn Morkff0992e92014-03-17 16:25:18 +0100857
Bjørn Mork6c4e5482014-05-16 21:48:22 +0200858 /* override ethtool_ops */
859 dev->net->ethtool_ops = &cdc_ncm_ethtool_ops;
860
Bjørn Mork289507d2014-05-30 09:31:06 +0200861 /* add our sysfs attrs */
862 dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group;
863
Alexey Orishko900d4952010-11-29 23:23:28 +0000864 return 0;
865
Alexey Orishko19694ac2011-05-24 05:26:13 +0000866error2:
867 usb_set_intfdata(ctx->control, NULL);
868 usb_set_intfdata(ctx->data, NULL);
Bjørn Mork6b4ef602013-01-21 05:50:40 +0000869 if (ctx->data != ctx->control)
870 usb_driver_release_interface(driver, ctx->data);
Alexey Orishko900d4952010-11-29 23:23:28 +0000871error:
872 cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]);
873 dev->data[0] = 0;
Bjørn Mork296e81f2013-11-01 11:17:00 +0100874 dev_info(&intf->dev, "bind() failure\n");
Alexey Orishko900d4952010-11-29 23:23:28 +0000875 return -ENODEV;
876}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +0000877EXPORT_SYMBOL_GPL(cdc_ncm_bind_common);
Alexey Orishko900d4952010-11-29 23:23:28 +0000878
Bjørn Morkc91ce3b2012-10-22 10:56:35 +0000879void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf)
Alexey Orishko900d4952010-11-29 23:23:28 +0000880{
881 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexey Orishko19694ac2011-05-24 05:26:13 +0000882 struct usb_driver *driver = driver_of(intf);
Alexey Orishko900d4952010-11-29 23:23:28 +0000883
884 if (ctx == NULL)
885 return; /* no setup */
886
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +0000887 atomic_set(&ctx->stop, 1);
888
889 if (hrtimer_active(&ctx->tx_timer))
890 hrtimer_cancel(&ctx->tx_timer);
891
892 tasklet_kill(&ctx->bh);
893
Bjørn Morkbbc8d922012-11-13 03:19:43 +0000894 /* handle devices with combined control and data interface */
895 if (ctx->control == ctx->data)
896 ctx->data = NULL;
897
Alexey Orishko19694ac2011-05-24 05:26:13 +0000898 /* disconnect master --> disconnect slave */
899 if (intf == ctx->control && ctx->data) {
900 usb_set_intfdata(ctx->data, NULL);
Alexey Orishko900d4952010-11-29 23:23:28 +0000901 usb_driver_release_interface(driver, ctx->data);
Alexey Orishko19694ac2011-05-24 05:26:13 +0000902 ctx->data = NULL;
Alexey Orishko900d4952010-11-29 23:23:28 +0000903
Alexey Orishko19694ac2011-05-24 05:26:13 +0000904 } else if (intf == ctx->data && ctx->control) {
905 usb_set_intfdata(ctx->control, NULL);
Alexey Orishko900d4952010-11-29 23:23:28 +0000906 usb_driver_release_interface(driver, ctx->control);
Alexey Orishko19694ac2011-05-24 05:26:13 +0000907 ctx->control = NULL;
Alexey Orishko900d4952010-11-29 23:23:28 +0000908 }
909
Bjørn Mork3e515662013-11-01 11:16:40 +0100910 usb_set_intfdata(intf, NULL);
Alexey Orishko900d4952010-11-29 23:23:28 +0000911 cdc_ncm_free(ctx);
912}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +0000913EXPORT_SYMBOL_GPL(cdc_ncm_unbind);
Alexey Orishko900d4952010-11-29 23:23:28 +0000914
Bjørn Mork50a0ffa2014-05-11 10:47:15 +0200915/* Return the number of the MBIM control interface altsetting iff it
916 * is preferred and available,
Bjørn Mork1e8bbe62013-03-14 01:05:13 +0000917 */
Bjørn Mork50a0ffa2014-05-11 10:47:15 +0200918u8 cdc_ncm_select_altsetting(struct usb_interface *intf)
Greg Suarez38396e42012-10-22 10:56:31 +0000919{
Bjørn Mork1e8bbe62013-03-14 01:05:13 +0000920 struct usb_host_interface *alt;
Greg Suarez38396e42012-10-22 10:56:31 +0000921
Bjørn Morkbd329e12012-10-22 10:56:38 +0000922 /* The MBIM spec defines a NCM compatible default altsetting,
923 * which we may have matched:
924 *
925 * "Functions that implement both NCM 1.0 and MBIM (an
926 * “NCM/MBIM function”) according to this recommendation
927 * shall provide two alternate settings for the
928 * Communication Interface. Alternate setting 0, and the
929 * associated class and endpoint descriptors, shall be
930 * constructed according to the rules given for the
931 * Communication Interface in section 5 of [USBNCM10].
932 * Alternate setting 1, and the associated class and
933 * endpoint descriptors, shall be constructed according to
934 * the rules given in section 6 (USB Device Model) of this
935 * specification."
Bjørn Morkbd329e12012-10-22 10:56:38 +0000936 */
Bjørn Mork50a0ffa2014-05-11 10:47:15 +0200937 if (intf->num_altsetting < 2)
938 return intf->cur_altsetting->desc.bAlternateSetting;
939
940 if (prefer_mbim) {
Bjørn Mork1e8bbe62013-03-14 01:05:13 +0000941 alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM);
Bjørn Mork50a0ffa2014-05-11 10:47:15 +0200942 if (alt && cdc_ncm_comm_intf_is_mbim(alt))
943 return CDC_NCM_COMM_ALTSETTING_MBIM;
Bjørn Morkf350ca02013-02-13 12:09:52 +0000944 }
Bjørn Mork50a0ffa2014-05-11 10:47:15 +0200945 return CDC_NCM_COMM_ALTSETTING_NCM;
Bjørn Mork1e8bbe62013-03-14 01:05:13 +0000946}
947EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting);
948
949static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf)
950{
951 int ret;
952
953 /* MBIM backwards compatible function? */
Bjørn Mork50a0ffa2014-05-11 10:47:15 +0200954 if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM)
Bjørn Mork1e8bbe62013-03-14 01:05:13 +0000955 return -ENODEV;
Bjørn Morkbd329e12012-10-22 10:56:38 +0000956
Bjørn Mork50a0ffa2014-05-11 10:47:15 +0200957 /* The NCM data altsetting is fixed */
958 ret = cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM);
Greg Suarez38396e42012-10-22 10:56:31 +0000959
960 /*
961 * We should get an event when network connection is "connected" or
962 * "disconnected". Set network connection in "disconnected" state
963 * (carrier is OFF) during attach, so the IP network stack does not
964 * start IPv6 negotiation and more.
965 */
Ming Lei8a34b0a2013-04-11 04:40:33 +0000966 usbnet_link_change(dev, 0, 0);
Greg Suarez38396e42012-10-22 10:56:31 +0000967 return ret;
968}
969
Bjørn Morkc78b7c52012-10-22 10:56:34 +0000970static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max)
Alexey Orishko900d4952010-11-29 23:23:28 +0000971{
Bjørn Morkc78b7c52012-10-22 10:56:34 +0000972 size_t align = ALIGN(skb->len, modulus) - skb->len + remainder;
973
974 if (skb->len + align > max)
975 align = max - skb->len;
976 if (align && skb_tailroom(skb) >= align)
977 memset(skb_put(skb, align), 0, align);
978}
979
980/* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly
981 * allocating a new one within skb
982 */
983static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve)
984{
985 struct usb_cdc_ncm_ndp16 *ndp16 = NULL;
986 struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data;
987 size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex);
988
989 /* follow the chain of NDPs, looking for a match */
990 while (ndpoffset) {
991 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset);
992 if (ndp16->dwSignature == sign)
993 return ndp16;
994 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
995 }
996
997 /* align new NDP */
998 cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max);
999
1000 /* verify that there is room for the NDP and the datagram (reserve) */
Bjørn Mork70559b82014-05-16 21:48:23 +02001001 if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size)
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001002 return NULL;
1003
1004 /* link to it */
1005 if (ndp16)
1006 ndp16->wNextNdpIndex = cpu_to_le16(skb->len);
1007 else
1008 nth16->wNdpIndex = cpu_to_le16(skb->len);
1009
1010 /* push a new empty NDP */
Bjørn Mork70559b82014-05-16 21:48:23 +02001011 ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size);
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001012 ndp16->dwSignature = sign;
1013 ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16));
1014 return ndp16;
Alexey Orishko900d4952010-11-29 23:23:28 +00001015}
1016
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001017struct sk_buff *
Bjørn Morkbed6f762013-11-01 11:16:42 +01001018cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
Alexey Orishko900d4952010-11-29 23:23:28 +00001019{
Bjørn Morkbed6f762013-11-01 11:16:42 +01001020 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001021 struct usb_cdc_ncm_nth16 *nth16;
1022 struct usb_cdc_ncm_ndp16 *ndp16;
Alexey Orishko900d4952010-11-29 23:23:28 +00001023 struct sk_buff *skb_out;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001024 u16 n = 0, index, ndplen;
Alexey Orishko84e77a82011-02-07 09:45:10 +00001025 u8 ready2send = 0;
Alexey Orishko900d4952010-11-29 23:23:28 +00001026
1027 /* if there is a remaining skb, it gets priority */
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001028 if (skb != NULL) {
Alexey Orishko900d4952010-11-29 23:23:28 +00001029 swap(skb, ctx->tx_rem_skb);
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001030 swap(sign, ctx->tx_rem_sign);
1031 } else {
Alexey Orishko84e77a82011-02-07 09:45:10 +00001032 ready2send = 1;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001033 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001034
1035 /* check if we are resuming an OUT skb */
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001036 skb_out = ctx->tx_curr_skb;
Alexey Orishko900d4952010-11-29 23:23:28 +00001037
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001038 /* allocate a new OUT skb */
1039 if (!skb_out) {
Bjørn Mork20572222013-11-01 11:16:38 +01001040 skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC);
Alexey Orishko900d4952010-11-29 23:23:28 +00001041 if (skb_out == NULL) {
1042 if (skb != NULL) {
1043 dev_kfree_skb_any(skb);
Bjørn Morkbed6f762013-11-01 11:16:42 +01001044 dev->net->stats.tx_dropped++;
Alexey Orishko900d4952010-11-29 23:23:28 +00001045 }
1046 goto exit_no_skb;
1047 }
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001048 /* fill out the initial 16-bit NTB header */
1049 nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16));
1050 nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN);
1051 nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16));
1052 nth16->wSequence = cpu_to_le16(ctx->tx_seq++);
Alexey Orishko900d4952010-11-29 23:23:28 +00001053
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001054 /* count total number of frames in this NTB */
Alexey Orishko900d4952010-11-29 23:23:28 +00001055 ctx->tx_curr_frame_num = 0;
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001056
1057 /* recent payload counter for this skb_out */
1058 ctx->tx_curr_frame_payload = 0;
Alexey Orishko900d4952010-11-29 23:23:28 +00001059 }
1060
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001061 for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) {
1062 /* send any remaining skb first */
Alexey Orishko900d4952010-11-29 23:23:28 +00001063 if (skb == NULL) {
1064 skb = ctx->tx_rem_skb;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001065 sign = ctx->tx_rem_sign;
Alexey Orishko900d4952010-11-29 23:23:28 +00001066 ctx->tx_rem_skb = NULL;
1067
1068 /* check for end of skb */
1069 if (skb == NULL)
1070 break;
1071 }
1072
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001073 /* get the appropriate NDP for this skb */
1074 ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder);
1075
1076 /* align beginning of next frame */
1077 cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max);
1078
1079 /* check if we had enough room left for both NDP and frame */
1080 if (!ndp16 || skb_out->len + skb->len > ctx->tx_max) {
Alexey Orishko900d4952010-11-29 23:23:28 +00001081 if (n == 0) {
1082 /* won't fit, MTU problem? */
1083 dev_kfree_skb_any(skb);
1084 skb = NULL;
Bjørn Morkbed6f762013-11-01 11:16:42 +01001085 dev->net->stats.tx_dropped++;
Alexey Orishko900d4952010-11-29 23:23:28 +00001086 } else {
1087 /* no room for skb - store for later */
1088 if (ctx->tx_rem_skb != NULL) {
1089 dev_kfree_skb_any(ctx->tx_rem_skb);
Bjørn Morkbed6f762013-11-01 11:16:42 +01001090 dev->net->stats.tx_dropped++;
Alexey Orishko900d4952010-11-29 23:23:28 +00001091 }
1092 ctx->tx_rem_skb = skb;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001093 ctx->tx_rem_sign = sign;
Alexey Orishko900d4952010-11-29 23:23:28 +00001094 skb = NULL;
Alexey Orishko84e77a82011-02-07 09:45:10 +00001095 ready2send = 1;
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001096 ctx->tx_reason_ntb_full++; /* count reason for transmitting */
Alexey Orishko900d4952010-11-29 23:23:28 +00001097 }
1098 break;
1099 }
1100
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001101 /* calculate frame number withing this NDP */
1102 ndplen = le16_to_cpu(ndp16->wLength);
1103 index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1;
Alexey Orishko900d4952010-11-29 23:23:28 +00001104
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001105 /* OK, add this skb */
1106 ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len);
1107 ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len);
1108 ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16));
1109 memcpy(skb_put(skb_out, skb->len), skb->data, skb->len);
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001110 ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */
Alexey Orishko900d4952010-11-29 23:23:28 +00001111 dev_kfree_skb_any(skb);
1112 skb = NULL;
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001113
1114 /* send now if this NDP is full */
1115 if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) {
1116 ready2send = 1;
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001117 ctx->tx_reason_ndp_full++; /* count reason for transmitting */
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001118 break;
1119 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001120 }
1121
1122 /* free up any dangling skb */
1123 if (skb != NULL) {
1124 dev_kfree_skb_any(skb);
1125 skb = NULL;
Bjørn Morkbed6f762013-11-01 11:16:42 +01001126 dev->net->stats.tx_dropped++;
Alexey Orishko900d4952010-11-29 23:23:28 +00001127 }
1128
1129 ctx->tx_curr_frame_num = n;
1130
1131 if (n == 0) {
1132 /* wait for more frames */
1133 /* push variables */
1134 ctx->tx_curr_skb = skb_out;
Alexey Orishko900d4952010-11-29 23:23:28 +00001135 goto exit_no_skb;
1136
Bjørn Mork6c4e5482014-05-16 21:48:22 +02001137 } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) {
Alexey Orishko900d4952010-11-29 23:23:28 +00001138 /* wait for more frames */
1139 /* push variables */
1140 ctx->tx_curr_skb = skb_out;
Alexey Orishko900d4952010-11-29 23:23:28 +00001141 /* set the pending count */
1142 if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT)
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001143 ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT;
Alexey Orishko900d4952010-11-29 23:23:28 +00001144 goto exit_no_skb;
1145
1146 } else {
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001147 if (n == ctx->tx_max_datagrams)
1148 ctx->tx_reason_max_datagram++; /* count reason for transmitting */
Alexey Orishko900d4952010-11-29 23:23:28 +00001149 /* frame goes out */
1150 /* variables will be reset at next call */
1151 }
1152
Bjørn Mork43e4c6d2014-05-16 21:48:24 +02001153 /* If collected data size is less or equal ctx->min_tx_pkt
Bjørn Mork20572222013-11-01 11:16:38 +01001154 * bytes, we send buffers as it is. If we get more data, it
1155 * would be more efficient for USB HS mobile device with DMA
1156 * engine to receive a full size NTB, than canceling DMA
1157 * transfer and receiving a short packet.
Bjørn Mork4d619f62013-11-01 11:16:49 +01001158 *
1159 * This optimization support is pointless if we end up sending
1160 * a ZLP after full sized NTBs.
Alexey Orishko900d4952010-11-29 23:23:28 +00001161 */
Bjørn Mork4d619f62013-11-01 11:16:49 +01001162 if (!(dev->driver_info->flags & FLAG_SEND_ZLP) &&
Bjørn Mork43e4c6d2014-05-16 21:48:24 +02001163 skb_out->len > ctx->min_tx_pkt)
Bjørn Mork20572222013-11-01 11:16:38 +01001164 memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0,
1165 ctx->tx_max - skb_out->len);
Bjørn Mork9becd702014-05-02 23:27:00 +02001166 else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0)
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001167 *skb_put(skb_out, 1) = 0; /* force short packet */
Alexey Orishko900d4952010-11-29 23:23:28 +00001168
Bjørn Morkc78b7c52012-10-22 10:56:34 +00001169 /* set final frame length */
1170 nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data;
1171 nth16->wBlockLength = cpu_to_le16(skb_out->len);
Alexey Orishko900d4952010-11-29 23:23:28 +00001172
1173 /* return skb */
1174 ctx->tx_curr_skb = NULL;
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001175
1176 /* keep private stats: framing overhead and number of NTBs */
1177 ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload;
1178 ctx->tx_ntbs++;
1179
Ben Hutchings7a1e8902015-03-25 21:41:33 +01001180 /* usbnet will count all the framing overhead by default.
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001181 * Adjust the stats so that the tx_bytes counter show real
1182 * payload data instead.
1183 */
Ben Hutchings7a1e8902015-03-25 21:41:33 +01001184 usbnet_set_skb_tx_stats(skb_out, n,
1185 ctx->tx_curr_frame_payload - skb_out->len);
Ben Hutchings1e9e39f2015-02-26 19:34:37 +00001186
Alexey Orishko900d4952010-11-29 23:23:28 +00001187 return skb_out;
1188
1189exit_no_skb:
Bjørn Mork046c6592014-05-16 21:48:29 +02001190 /* Start timer, if there is a remaining non-empty skb */
1191 if (ctx->tx_curr_skb != NULL && n > 0)
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001192 cdc_ncm_tx_timeout_start(ctx);
Alexey Orishko900d4952010-11-29 23:23:28 +00001193 return NULL;
1194}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001195EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame);
Alexey Orishko900d4952010-11-29 23:23:28 +00001196
1197static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx)
1198{
1199 /* start timer, if not already started */
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001200 if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop)))
1201 hrtimer_start(&ctx->tx_timer,
Bjørn Mork6c4e5482014-05-16 21:48:22 +02001202 ktime_set(0, ctx->timer_interval),
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001203 HRTIMER_MODE_REL);
Alexey Orishko900d4952010-11-29 23:23:28 +00001204}
1205
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001206static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer)
Alexey Orishko900d4952010-11-29 23:23:28 +00001207{
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001208 struct cdc_ncm_ctx *ctx =
1209 container_of(timer, struct cdc_ncm_ctx, tx_timer);
Alexey Orishko900d4952010-11-29 23:23:28 +00001210
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001211 if (!atomic_read(&ctx->stop))
1212 tasklet_schedule(&ctx->bh);
1213 return HRTIMER_NORESTART;
1214}
1215
1216static void cdc_ncm_txpath_bh(unsigned long param)
1217{
Bjørn Morkbed6f762013-11-01 11:16:42 +01001218 struct usbnet *dev = (struct usbnet *)param;
1219 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001220
1221 spin_lock_bh(&ctx->mtx);
Alexey Orishko900d4952010-11-29 23:23:28 +00001222 if (ctx->tx_timer_pending != 0) {
1223 ctx->tx_timer_pending--;
Alexey Orishko900d4952010-11-29 23:23:28 +00001224 cdc_ncm_tx_timeout_start(ctx);
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001225 spin_unlock_bh(&ctx->mtx);
Bjørn Morkbed6f762013-11-01 11:16:42 +01001226 } else if (dev->net != NULL) {
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001227 ctx->tx_reason_timeout++; /* count reason for transmitting */
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001228 spin_unlock_bh(&ctx->mtx);
Bjørn Morkbed6f762013-11-01 11:16:42 +01001229 netif_tx_lock_bh(dev->net);
1230 usbnet_start_xmit(NULL, dev->net);
1231 netif_tx_unlock_bh(dev->net);
Bjørn Mork7b1e0cb2012-10-25 21:44:09 +00001232 } else {
1233 spin_unlock_bh(&ctx->mtx);
Alexey Orishkof742aa82011-01-17 07:07:25 +00001234 }
Alexey Orishko900d4952010-11-29 23:23:28 +00001235}
1236
Enrico Mioso2f69702c2013-11-04 09:50:47 +01001237struct sk_buff *
Alexey Orishko900d4952010-11-29 23:23:28 +00001238cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
1239{
1240 struct sk_buff *skb_out;
1241 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
Alexey Orishko900d4952010-11-29 23:23:28 +00001242
1243 /*
1244 * The Ethernet API we are using does not support transmitting
1245 * multiple Ethernet frames in a single call. This driver will
1246 * accumulate multiple Ethernet frames and send out a larger
1247 * USB frame when the USB buffer is full or when a single jiffies
1248 * timeout happens.
1249 */
1250 if (ctx == NULL)
1251 goto error;
1252
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001253 spin_lock_bh(&ctx->mtx);
Bjørn Morkbed6f762013-11-01 11:16:42 +01001254 skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN));
Alexey Orishkoc84ff1d2012-03-14 11:26:10 +00001255 spin_unlock_bh(&ctx->mtx);
Alexey Orishko900d4952010-11-29 23:23:28 +00001256 return skb_out;
1257
1258error:
1259 if (skb != NULL)
1260 dev_kfree_skb_any(skb);
1261
1262 return NULL;
1263}
Enrico Mioso2f69702c2013-11-04 09:50:47 +01001264EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup);
Alexey Orishko900d4952010-11-29 23:23:28 +00001265
Bjørn Morkff06ab12012-10-22 10:56:33 +00001266/* verify NTB header and return offset of first NDP, or negative error */
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001267int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
Alexey Orishko900d4952010-11-29 23:23:28 +00001268{
Bjørn Morkae223cd2013-11-01 11:16:54 +01001269 struct usbnet *dev = netdev_priv(skb_in->dev);
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001270 struct usb_cdc_ncm_nth16 *nth16;
Bjørn Morkff06ab12012-10-22 10:56:33 +00001271 int len;
1272 int ret = -EINVAL;
Alexey Orishko900d4952010-11-29 23:23:28 +00001273
Alexey Orishko900d4952010-11-29 23:23:28 +00001274 if (ctx == NULL)
1275 goto error;
1276
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001277 if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) +
1278 sizeof(struct usb_cdc_ncm_ndp16))) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001279 netif_dbg(dev, rx_err, dev->net, "frame too short\n");
Alexey Orishko900d4952010-11-29 23:23:28 +00001280 goto error;
1281 }
1282
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001283 nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data;
Alexey Orishko900d4952010-11-29 23:23:28 +00001284
Bjørn Mork986e10d2013-11-01 11:16:56 +01001285 if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) {
Bjørn Mork5448d752013-11-01 11:16:55 +01001286 netif_dbg(dev, rx_err, dev->net,
1287 "invalid NTH16 signature <%#010x>\n",
1288 le32_to_cpu(nth16->dwSignature));
Alexey Orishko900d4952010-11-29 23:23:28 +00001289 goto error;
1290 }
1291
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001292 len = le16_to_cpu(nth16->wBlockLength);
1293 if (len > ctx->rx_max) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001294 netif_dbg(dev, rx_err, dev->net,
1295 "unsupported NTB block length %u/%u\n", len,
1296 ctx->rx_max);
Alexey Orishko900d4952010-11-29 23:23:28 +00001297 goto error;
1298 }
1299
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001300 if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) &&
Bjørn Morkae223cd2013-11-01 11:16:54 +01001301 (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) &&
1302 !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) {
1303 netif_dbg(dev, rx_err, dev->net,
1304 "sequence number glitch prev=%d curr=%d\n",
1305 ctx->rx_seq, le16_to_cpu(nth16->wSequence));
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001306 }
1307 ctx->rx_seq = le16_to_cpu(nth16->wSequence);
1308
Bjørn Morkff06ab12012-10-22 10:56:33 +00001309 ret = le16_to_cpu(nth16->wNdpIndex);
1310error:
1311 return ret;
1312}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001313EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001314
1315/* verify NDP header and return number of datagrams, or negative error */
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001316int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset)
Bjørn Morkff06ab12012-10-22 10:56:33 +00001317{
Bjørn Morkae223cd2013-11-01 11:16:54 +01001318 struct usbnet *dev = netdev_priv(skb_in->dev);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001319 struct usb_cdc_ncm_ndp16 *ndp16;
1320 int ret = -EINVAL;
1321
Bjørn Mork75d67d32012-10-22 10:56:32 +00001322 if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001323 netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n",
1324 ndpoffset);
Alexey Orishko900d4952010-11-29 23:23:28 +00001325 goto error;
1326 }
Bjørn Mork75d67d32012-10-22 10:56:32 +00001327 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
Alexey Orishko900d4952010-11-29 23:23:28 +00001328
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001329 if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001330 netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n",
1331 le16_to_cpu(ndp16->wLength));
Bjørn Morkff06ab12012-10-22 10:56:33 +00001332 goto error;
Alexey Orishko900d4952010-11-29 23:23:28 +00001333 }
1334
Bjørn Morkff06ab12012-10-22 10:56:33 +00001335 ret = ((le16_to_cpu(ndp16->wLength) -
Alexey Orishko900d4952010-11-29 23:23:28 +00001336 sizeof(struct usb_cdc_ncm_ndp16)) /
1337 sizeof(struct usb_cdc_ncm_dpe16));
Bjørn Morkff06ab12012-10-22 10:56:33 +00001338 ret--; /* we process NDP entries except for the last one */
Alexey Orishko900d4952010-11-29 23:23:28 +00001339
Bjørn Morkae223cd2013-11-01 11:16:54 +01001340 if ((sizeof(struct usb_cdc_ncm_ndp16) +
1341 ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) {
1342 netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001343 ret = -EINVAL;
Alexey Orishko900d4952010-11-29 23:23:28 +00001344 }
1345
Bjørn Morkff06ab12012-10-22 10:56:33 +00001346error:
1347 return ret;
1348}
Bjørn Morkc91ce3b2012-10-22 10:56:35 +00001349EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16);
Bjørn Morkff06ab12012-10-22 10:56:33 +00001350
Enrico Mioso2f69702c2013-11-04 09:50:47 +01001351int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
Bjørn Morkff06ab12012-10-22 10:56:33 +00001352{
1353 struct sk_buff *skb;
1354 struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
1355 int len;
1356 int nframes;
1357 int x;
1358 int offset;
1359 struct usb_cdc_ncm_ndp16 *ndp16;
1360 struct usb_cdc_ncm_dpe16 *dpe16;
1361 int ndpoffset;
1362 int loopcount = 50; /* arbitrary max preventing infinite loop */
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001363 u32 payload = 0;
Bjørn Morkff06ab12012-10-22 10:56:33 +00001364
1365 ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in);
1366 if (ndpoffset < 0)
1367 goto error;
1368
1369next_ndp:
1370 nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset);
1371 if (nframes < 0)
1372 goto error;
1373
1374 ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset);
1375
Bjørn Mork986e10d2013-11-01 11:16:56 +01001376 if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) {
Bjørn Mork5448d752013-11-01 11:16:55 +01001377 netif_dbg(dev, rx_err, dev->net,
1378 "invalid DPT16 signature <%#010x>\n",
1379 le32_to_cpu(ndp16->dwSignature));
Bjørn Morkff06ab12012-10-22 10:56:33 +00001380 goto err_ndp;
1381 }
1382 dpe16 = ndp16->dpe16;
Alexey Orishko900d4952010-11-29 23:23:28 +00001383
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001384 for (x = 0; x < nframes; x++, dpe16++) {
1385 offset = le16_to_cpu(dpe16->wDatagramIndex);
1386 len = le16_to_cpu(dpe16->wDatagramLength);
Alexey Orishko900d4952010-11-29 23:23:28 +00001387
1388 /*
1389 * CDC NCM ch. 3.7
1390 * All entries after first NULL entry are to be ignored
1391 */
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001392 if ((offset == 0) || (len == 0)) {
Alexey Orishko900d4952010-11-29 23:23:28 +00001393 if (!x)
Bjørn Mork75d67d32012-10-22 10:56:32 +00001394 goto err_ndp; /* empty NTB */
Alexey Orishko900d4952010-11-29 23:23:28 +00001395 break;
1396 }
1397
1398 /* sanity checking */
Alexey Orishkod5ddb4a2012-03-14 11:26:12 +00001399 if (((offset + len) > skb_in->len) ||
1400 (len > ctx->rx_max) || (len < ETH_HLEN)) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001401 netif_dbg(dev, rx_err, dev->net,
1402 "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n",
1403 x, offset, len, skb_in);
Alexey Orishko900d4952010-11-29 23:23:28 +00001404 if (!x)
Bjørn Mork75d67d32012-10-22 10:56:32 +00001405 goto err_ndp;
Alexey Orishko900d4952010-11-29 23:23:28 +00001406 break;
1407
1408 } else {
Bjørn Mork1e2c6112014-05-30 09:31:03 +02001409 /* create a fresh copy to reduce truesize */
1410 skb = netdev_alloc_skb_ip_align(dev->net, len);
Jesper Juhl9e567902011-01-13 11:40:11 +00001411 if (!skb)
1412 goto error;
Bjørn Mork1e2c6112014-05-30 09:31:03 +02001413 memcpy(skb_put(skb, len), skb_in->data + offset, len);
Alexey Orishko900d4952010-11-29 23:23:28 +00001414 usbnet_skb_return(dev, skb);
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001415 payload += len; /* count payload bytes in this NTB */
Alexey Orishko900d4952010-11-29 23:23:28 +00001416 }
1417 }
Bjørn Mork75d67d32012-10-22 10:56:32 +00001418err_ndp:
1419 /* are there more NDPs to process? */
1420 ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex);
1421 if (ndpoffset && loopcount--)
1422 goto next_ndp;
1423
Bjørn Morkbeeecd42014-05-16 21:48:25 +02001424 /* update stats */
1425 ctx->rx_overhead += skb_in->len - payload;
1426 ctx->rx_ntbs++;
1427
Alexey Orishko900d4952010-11-29 23:23:28 +00001428 return 1;
1429error:
1430 return 0;
1431}
Enrico Mioso2f69702c2013-11-04 09:50:47 +01001432EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup);
Alexey Orishko900d4952010-11-29 23:23:28 +00001433
1434static void
Bjørn Morkbed6f762013-11-01 11:16:42 +01001435cdc_ncm_speed_change(struct usbnet *dev,
Alexey Orishko84e77a82011-02-07 09:45:10 +00001436 struct usb_cdc_speed_change *data)
Alexey Orishko900d4952010-11-29 23:23:28 +00001437{
Alexey Orishko84e77a82011-02-07 09:45:10 +00001438 uint32_t rx_speed = le32_to_cpu(data->DLBitRRate);
1439 uint32_t tx_speed = le32_to_cpu(data->ULBitRate);
Alexey Orishko900d4952010-11-29 23:23:28 +00001440
1441 /*
1442 * Currently the USB-NET API does not support reporting the actual
1443 * device speed. Do print it instead.
1444 */
Bjørn Morkf3028c52013-11-01 11:16:44 +01001445 if ((tx_speed > 1000000) && (rx_speed > 1000000)) {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001446 netif_info(dev, link, dev->net,
Bjørn Mork916f7642014-05-16 21:48:27 +02001447 "%u mbit/s downlink %u mbit/s uplink\n",
1448 (unsigned int)(rx_speed / 1000000U),
1449 (unsigned int)(tx_speed / 1000000U));
Bjørn Morkf3028c52013-11-01 11:16:44 +01001450 } else {
Bjørn Morkae223cd2013-11-01 11:16:54 +01001451 netif_info(dev, link, dev->net,
Bjørn Mork916f7642014-05-16 21:48:27 +02001452 "%u kbit/s downlink %u kbit/s uplink\n",
1453 (unsigned int)(rx_speed / 1000U),
1454 (unsigned int)(tx_speed / 1000U));
Alexey Orishko900d4952010-11-29 23:23:28 +00001455 }
1456}
1457
1458static void cdc_ncm_status(struct usbnet *dev, struct urb *urb)
1459{
1460 struct cdc_ncm_ctx *ctx;
1461 struct usb_cdc_notification *event;
1462
1463 ctx = (struct cdc_ncm_ctx *)dev->data[0];
1464
1465 if (urb->actual_length < sizeof(*event))
1466 return;
1467
1468 /* test for split data in 8-byte chunks */
1469 if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) {
Bjørn Morkbed6f762013-11-01 11:16:42 +01001470 cdc_ncm_speed_change(dev,
Alexey Orishko84e77a82011-02-07 09:45:10 +00001471 (struct usb_cdc_speed_change *)urb->transfer_buffer);
Alexey Orishko900d4952010-11-29 23:23:28 +00001472 return;
1473 }
1474
1475 event = urb->transfer_buffer;
1476
1477 switch (event->bNotificationType) {
1478 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
1479 /*
1480 * According to the CDC NCM specification ch.7.1
1481 * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be
1482 * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE.
1483 */
Bjørn Morkae223cd2013-11-01 11:16:54 +01001484 netif_info(dev, link, dev->net,
1485 "network connection: %sconnected\n",
Bjørn Morkfa83dbe2014-05-16 21:48:28 +02001486 !!event->wValue ? "" : "dis");
1487 usbnet_link_change(dev, !!event->wValue, 0);
Alexey Orishko900d4952010-11-29 23:23:28 +00001488 break;
1489
1490 case USB_CDC_NOTIFY_SPEED_CHANGE:
Alexey Orishko84e77a82011-02-07 09:45:10 +00001491 if (urb->actual_length < (sizeof(*event) +
1492 sizeof(struct usb_cdc_speed_change)))
Alexey Orishko900d4952010-11-29 23:23:28 +00001493 set_bit(EVENT_STS_SPLIT, &dev->flags);
1494 else
Bjørn Morkbed6f762013-11-01 11:16:42 +01001495 cdc_ncm_speed_change(dev,
1496 (struct usb_cdc_speed_change *)&event[1]);
Alexey Orishko900d4952010-11-29 23:23:28 +00001497 break;
1498
1499 default:
Bjørn Mork67a36602013-04-08 08:26:23 +00001500 dev_dbg(&dev->udev->dev,
1501 "NCM: unexpected notification 0x%02x!\n",
1502 event->bNotificationType);
Alexey Orishko900d4952010-11-29 23:23:28 +00001503 break;
1504 }
1505}
1506
Alexey Orishko900d4952010-11-29 23:23:28 +00001507static const struct driver_info cdc_ncm_info = {
1508 .description = "CDC NCM",
Arnd Bergmannc2613442011-04-01 20:12:02 -07001509 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET,
Alexey Orishko900d4952010-11-29 23:23:28 +00001510 .bind = cdc_ncm_bind,
1511 .unbind = cdc_ncm_unbind,
Oliver Neukuma5e40702012-12-18 04:46:12 +00001512 .manage_power = usbnet_manage_power,
Alexey Orishko900d4952010-11-29 23:23:28 +00001513 .status = cdc_ncm_status,
1514 .rx_fixup = cdc_ncm_rx_fixup,
1515 .tx_fixup = cdc_ncm_tx_fixup,
1516};
1517
Dan Williamsf94898e2012-07-24 08:43:22 +00001518/* Same as cdc_ncm_info, but with FLAG_WWAN */
1519static const struct driver_info wwan_info = {
1520 .description = "Mobile Broadband Network Device",
1521 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1522 | FLAG_WWAN,
1523 .bind = cdc_ncm_bind,
1524 .unbind = cdc_ncm_unbind,
Oliver Neukuma5e40702012-12-18 04:46:12 +00001525 .manage_power = usbnet_manage_power,
Dan Williamsf94898e2012-07-24 08:43:22 +00001526 .status = cdc_ncm_status,
1527 .rx_fixup = cdc_ncm_rx_fixup,
1528 .tx_fixup = cdc_ncm_tx_fixup,
1529};
1530
Wei Shuai2f62d5a2013-01-21 06:00:32 +00001531/* Same as wwan_info, but with FLAG_NOARP */
1532static const struct driver_info wwan_noarp_info = {
1533 .description = "Mobile Broadband Network Device (NO ARP)",
1534 .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
1535 | FLAG_WWAN | FLAG_NOARP,
1536 .bind = cdc_ncm_bind,
1537 .unbind = cdc_ncm_unbind,
Wei Shuai2f62d5a2013-01-21 06:00:32 +00001538 .manage_power = usbnet_manage_power,
1539 .status = cdc_ncm_status,
1540 .rx_fixup = cdc_ncm_rx_fixup,
1541 .tx_fixup = cdc_ncm_tx_fixup,
1542};
1543
Dan Williamsf94898e2012-07-24 08:43:22 +00001544static const struct usb_device_id cdc_devs[] = {
1545 /* Ericsson MBM devices like F5521gw */
1546 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1547 | USB_DEVICE_ID_MATCH_VENDOR,
1548 .idVendor = 0x0bdb,
1549 .bInterfaceClass = USB_CLASS_COMM,
1550 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1551 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1552 .driver_info = (unsigned long) &wwan_info,
1553 },
1554
Peter Meiserf3a1ef92012-08-02 02:30:20 +00001555 /* Dell branded MBM devices like DW5550 */
1556 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1557 | USB_DEVICE_ID_MATCH_VENDOR,
1558 .idVendor = 0x413c,
1559 .bInterfaceClass = USB_CLASS_COMM,
1560 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1561 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1562 .driver_info = (unsigned long) &wwan_info,
1563 },
1564
1565 /* Toshiba branded MBM devices */
1566 { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
1567 | USB_DEVICE_ID_MATCH_VENDOR,
1568 .idVendor = 0x0930,
1569 .bInterfaceClass = USB_CLASS_COMM,
1570 .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM,
1571 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
1572 .driver_info = (unsigned long) &wwan_info,
1573 },
1574
Bjørn Mork1f84eab2013-02-27 03:08:58 +00001575 /* tag Huawei devices as wwan */
1576 { USB_VENDOR_AND_INTERFACE_INFO(0x12d1,
1577 USB_CLASS_COMM,
1578 USB_CDC_SUBCLASS_NCM,
1579 USB_CDC_PROTO_NONE),
1580 .driver_info = (unsigned long)&wwan_info,
1581 },
1582
Wei Shuai2f62d5a2013-01-21 06:00:32 +00001583 /* Infineon(now Intel) HSPA Modem platform */
1584 { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
1585 USB_CLASS_COMM,
1586 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1587 .driver_info = (unsigned long)&wwan_noarp_info,
1588 },
1589
Dan Williamsf94898e2012-07-24 08:43:22 +00001590 /* Generic CDC-NCM devices */
1591 { USB_INTERFACE_INFO(USB_CLASS_COMM,
1592 USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
1593 .driver_info = (unsigned long)&cdc_ncm_info,
1594 },
1595 {
1596 },
1597};
1598MODULE_DEVICE_TABLE(usb, cdc_devs);
1599
Alexey Orishko900d4952010-11-29 23:23:28 +00001600static struct usb_driver cdc_ncm_driver = {
1601 .name = "cdc_ncm",
1602 .id_table = cdc_devs,
Bjørn Mork085e50e2013-11-01 11:16:50 +01001603 .probe = usbnet_probe,
1604 .disconnect = usbnet_disconnect,
Alexey Orishko900d4952010-11-29 23:23:28 +00001605 .suspend = usbnet_suspend,
1606 .resume = usbnet_resume,
Stefan Metzmacher85e3c652011-06-01 02:01:41 +00001607 .reset_resume = usbnet_resume,
Alexey Orishko900d4952010-11-29 23:23:28 +00001608 .supports_autosuspend = 1,
Sarah Sharpe1f12eb2012-04-23 10:08:51 -07001609 .disable_hub_initiated_lpm = 1,
Alexey Orishko900d4952010-11-29 23:23:28 +00001610};
1611
Greg Kroah-Hartmand632eb12011-11-18 09:44:20 -08001612module_usb_driver(cdc_ncm_driver);
Alexey Orishko900d4952010-11-29 23:23:28 +00001613
1614MODULE_AUTHOR("Hans Petter Selasky");
1615MODULE_DESCRIPTION("USB CDC NCM host driver");
1616MODULE_LICENSE("Dual BSD/GPL");