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900d495a AO |
1 | /* |
2 | * cdc_ncm.c | |
3 | * | |
c84ff1d6 | 4 | * Copyright (C) ST-Ericsson 2010-2012 |
900d495a AO |
5 | * 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) | |
22401ff1 | 9 | * http://www.usb.org/developers/docs/devclass_docs/NCM10_012011.zip |
900d495a AO |
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> | |
900d495a AO |
42 | #include <linux/netdevice.h> |
43 | #include <linux/ctype.h> | |
1dfddff5 | 44 | #include <linux/etherdevice.h> |
900d495a AO |
45 | #include <linux/ethtool.h> |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/mii.h> | |
48 | #include <linux/crc32.h> | |
49 | #include <linux/usb.h> | |
c84ff1d6 | 50 | #include <linux/hrtimer.h> |
900d495a AO |
51 | #include <linux/atomic.h> |
52 | #include <linux/usb/usbnet.h> | |
53 | #include <linux/usb/cdc.h> | |
c91ce3b6 | 54 | #include <linux/usb/cdc_ncm.h> |
900d495a | 55 | |
1e8bbe6c BM |
56 | #if IS_ENABLED(CONFIG_USB_NET_CDC_MBIM) |
57 | static bool prefer_mbim = true; | |
58 | #else | |
59 | static bool prefer_mbim; | |
60 | #endif | |
61 | module_param(prefer_mbim, bool, S_IRUGO | S_IWUSR); | |
62 | MODULE_PARM_DESC(prefer_mbim, "Prefer MBIM setting on dual NCM/MBIM functions"); | |
63 | ||
c84ff1d6 AO |
64 | static void cdc_ncm_txpath_bh(unsigned long param); |
65 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx); | |
66 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *hr_timer); | |
900d495a | 67 | static struct usb_driver cdc_ncm_driver; |
900d495a | 68 | |
beeecd42 BM |
69 | struct cdc_ncm_stats { |
70 | char stat_string[ETH_GSTRING_LEN]; | |
71 | int sizeof_stat; | |
72 | int stat_offset; | |
73 | }; | |
74 | ||
75 | #define CDC_NCM_STAT(str, m) { \ | |
76 | .stat_string = str, \ | |
77 | .sizeof_stat = sizeof(((struct cdc_ncm_ctx *)0)->m), \ | |
78 | .stat_offset = offsetof(struct cdc_ncm_ctx, m) } | |
79 | #define CDC_NCM_SIMPLE_STAT(m) CDC_NCM_STAT(__stringify(m), m) | |
80 | ||
81 | static const struct cdc_ncm_stats cdc_ncm_gstrings_stats[] = { | |
82 | CDC_NCM_SIMPLE_STAT(tx_reason_ntb_full), | |
83 | CDC_NCM_SIMPLE_STAT(tx_reason_ndp_full), | |
84 | CDC_NCM_SIMPLE_STAT(tx_reason_timeout), | |
85 | CDC_NCM_SIMPLE_STAT(tx_reason_max_datagram), | |
86 | CDC_NCM_SIMPLE_STAT(tx_overhead), | |
87 | CDC_NCM_SIMPLE_STAT(tx_ntbs), | |
88 | CDC_NCM_SIMPLE_STAT(rx_overhead), | |
89 | CDC_NCM_SIMPLE_STAT(rx_ntbs), | |
90 | }; | |
91 | ||
92 | static int cdc_ncm_get_sset_count(struct net_device __always_unused *netdev, int sset) | |
93 | { | |
94 | switch (sset) { | |
95 | case ETH_SS_STATS: | |
96 | return ARRAY_SIZE(cdc_ncm_gstrings_stats); | |
97 | default: | |
98 | return -EOPNOTSUPP; | |
99 | } | |
100 | } | |
101 | ||
102 | static void cdc_ncm_get_ethtool_stats(struct net_device *netdev, | |
103 | struct ethtool_stats __always_unused *stats, | |
104 | u64 *data) | |
105 | { | |
106 | struct usbnet *dev = netdev_priv(netdev); | |
107 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
108 | int i; | |
109 | char *p = NULL; | |
110 | ||
111 | for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { | |
112 | p = (char *)ctx + cdc_ncm_gstrings_stats[i].stat_offset; | |
113 | data[i] = (cdc_ncm_gstrings_stats[i].sizeof_stat == sizeof(u64)) ? *(u64 *)p : *(u32 *)p; | |
114 | } | |
115 | } | |
116 | ||
117 | static void cdc_ncm_get_strings(struct net_device __always_unused *netdev, u32 stringset, u8 *data) | |
118 | { | |
119 | u8 *p = data; | |
120 | int i; | |
121 | ||
122 | switch (stringset) { | |
123 | case ETH_SS_STATS: | |
124 | for (i = 0; i < ARRAY_SIZE(cdc_ncm_gstrings_stats); i++) { | |
125 | memcpy(p, cdc_ncm_gstrings_stats[i].stat_string, ETH_GSTRING_LEN); | |
126 | p += ETH_GSTRING_LEN; | |
127 | } | |
128 | } | |
129 | } | |
130 | ||
6c4e548f BM |
131 | static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx); |
132 | ||
6c4e548f BM |
133 | static const struct ethtool_ops cdc_ncm_ethtool_ops = { |
134 | .get_settings = usbnet_get_settings, | |
135 | .set_settings = usbnet_set_settings, | |
136 | .get_link = usbnet_get_link, | |
137 | .nway_reset = usbnet_nway_reset, | |
138 | .get_drvinfo = usbnet_get_drvinfo, | |
139 | .get_msglevel = usbnet_get_msglevel, | |
140 | .set_msglevel = usbnet_set_msglevel, | |
141 | .get_ts_info = ethtool_op_get_ts_info, | |
beeecd42 BM |
142 | .get_sset_count = cdc_ncm_get_sset_count, |
143 | .get_strings = cdc_ncm_get_strings, | |
144 | .get_ethtool_stats = cdc_ncm_get_ethtool_stats, | |
6c4e548f BM |
145 | }; |
146 | ||
289507d3 | 147 | static u32 cdc_ncm_check_rx_max(struct usbnet *dev, u32 new_rx) |
5aa73d5d BM |
148 | { |
149 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
5aa73d5d BM |
150 | u32 val, max, min; |
151 | ||
152 | /* clamp new_rx to sane values */ | |
153 | min = USB_CDC_NCM_NTB_MIN_IN_SIZE; | |
154 | max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_RX, le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); | |
155 | ||
156 | /* dwNtbInMaxSize spec violation? Use MIN size for both limits */ | |
157 | if (max < min) { | |
158 | dev_warn(&dev->intf->dev, "dwNtbInMaxSize=%u is too small. Using %u\n", | |
159 | le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize), min); | |
160 | max = min; | |
161 | } | |
162 | ||
163 | val = clamp_t(u32, new_rx, min, max); | |
289507d3 BM |
164 | if (val != new_rx) |
165 | dev_dbg(&dev->intf->dev, "rx_max must be in the [%u, %u] range\n", min, max); | |
166 | ||
167 | return val; | |
168 | } | |
169 | ||
170 | static u32 cdc_ncm_check_tx_max(struct usbnet *dev, u32 new_tx) | |
171 | { | |
172 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
173 | u32 val, max, min; | |
174 | ||
175 | /* clamp new_tx to sane values */ | |
176 | min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16); | |
177 | max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); | |
178 | ||
179 | /* some devices set dwNtbOutMaxSize too low for the above default */ | |
180 | min = min(min, max); | |
181 | ||
182 | val = clamp_t(u32, new_tx, min, max); | |
183 | if (val != new_tx) | |
184 | dev_dbg(&dev->intf->dev, "tx_max must be in the [%u, %u] range\n", min, max); | |
185 | ||
186 | return val; | |
187 | } | |
188 | ||
39eb7e0e BM |
189 | static ssize_t cdc_ncm_show_min_tx_pkt(struct device *d, struct device_attribute *attr, char *buf) |
190 | { | |
191 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
192 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
193 | ||
194 | return sprintf(buf, "%u\n", ctx->min_tx_pkt); | |
195 | } | |
196 | ||
289507d3 BM |
197 | static ssize_t cdc_ncm_show_rx_max(struct device *d, struct device_attribute *attr, char *buf) |
198 | { | |
199 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
200 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
201 | ||
202 | return sprintf(buf, "%u\n", ctx->rx_max); | |
203 | } | |
204 | ||
205 | static ssize_t cdc_ncm_show_tx_max(struct device *d, struct device_attribute *attr, char *buf) | |
206 | { | |
207 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
208 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
209 | ||
210 | return sprintf(buf, "%u\n", ctx->tx_max); | |
211 | } | |
212 | ||
213 | static ssize_t cdc_ncm_show_tx_timer_usecs(struct device *d, struct device_attribute *attr, char *buf) | |
214 | { | |
215 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
216 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
217 | ||
218 | return sprintf(buf, "%u\n", ctx->timer_interval / (u32)NSEC_PER_USEC); | |
219 | } | |
220 | ||
39eb7e0e BM |
221 | static ssize_t cdc_ncm_store_min_tx_pkt(struct device *d, struct device_attribute *attr, const char *buf, size_t len) |
222 | { | |
223 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
224 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
225 | unsigned long val; | |
226 | ||
227 | /* no need to restrict values - anything from 0 to infinity is OK */ | |
228 | if (kstrtoul(buf, 0, &val)) | |
229 | return -EINVAL; | |
230 | ||
231 | ctx->min_tx_pkt = val; | |
232 | return len; | |
233 | } | |
234 | ||
289507d3 BM |
235 | static ssize_t cdc_ncm_store_rx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) |
236 | { | |
237 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
238 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
239 | unsigned long val; | |
240 | ||
241 | if (kstrtoul(buf, 0, &val) || cdc_ncm_check_rx_max(dev, val) != val) | |
242 | return -EINVAL; | |
243 | ||
244 | cdc_ncm_update_rxtx_max(dev, val, ctx->tx_max); | |
245 | return len; | |
246 | } | |
247 | ||
248 | static ssize_t cdc_ncm_store_tx_max(struct device *d, struct device_attribute *attr, const char *buf, size_t len) | |
249 | { | |
250 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
251 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
252 | unsigned long val; | |
253 | ||
254 | if (kstrtoul(buf, 0, &val) || cdc_ncm_check_tx_max(dev, val) != val) | |
255 | return -EINVAL; | |
256 | ||
257 | cdc_ncm_update_rxtx_max(dev, ctx->rx_max, val); | |
258 | return len; | |
259 | } | |
260 | ||
261 | static ssize_t cdc_ncm_store_tx_timer_usecs(struct device *d, struct device_attribute *attr, const char *buf, size_t len) | |
262 | { | |
263 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
264 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
265 | ssize_t ret; | |
266 | unsigned long val; | |
267 | ||
268 | ret = kstrtoul(buf, 0, &val); | |
269 | if (ret) | |
270 | return ret; | |
271 | if (val && (val < CDC_NCM_TIMER_INTERVAL_MIN || val > CDC_NCM_TIMER_INTERVAL_MAX)) | |
272 | return -EINVAL; | |
273 | ||
274 | spin_lock_bh(&ctx->mtx); | |
275 | ctx->timer_interval = val * NSEC_PER_USEC; | |
276 | if (!ctx->timer_interval) | |
277 | ctx->tx_timer_pending = 0; | |
278 | spin_unlock_bh(&ctx->mtx); | |
279 | return len; | |
280 | } | |
281 | ||
39eb7e0e | 282 | static DEVICE_ATTR(min_tx_pkt, S_IRUGO | S_IWUSR, cdc_ncm_show_min_tx_pkt, cdc_ncm_store_min_tx_pkt); |
289507d3 BM |
283 | static DEVICE_ATTR(rx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_rx_max, cdc_ncm_store_rx_max); |
284 | static DEVICE_ATTR(tx_max, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_max, cdc_ncm_store_tx_max); | |
285 | static DEVICE_ATTR(tx_timer_usecs, S_IRUGO | S_IWUSR, cdc_ncm_show_tx_timer_usecs, cdc_ncm_store_tx_timer_usecs); | |
286 | ||
404814af BM |
287 | static ssize_t ndp_to_end_show(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 | ||
292 | return sprintf(buf, "%c\n", ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END ? 'Y' : 'N'); | |
293 | } | |
294 | ||
295 | static ssize_t ndp_to_end_store(struct device *d, struct device_attribute *attr, const char *buf, size_t len) | |
296 | { | |
297 | struct usbnet *dev = netdev_priv(to_net_dev(d)); | |
298 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
299 | bool enable; | |
300 | ||
301 | if (strtobool(buf, &enable)) | |
302 | return -EINVAL; | |
303 | ||
304 | /* no change? */ | |
305 | if (enable == (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) | |
306 | return len; | |
307 | ||
308 | if (enable && !ctx->delayed_ndp16) { | |
309 | ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
310 | if (!ctx->delayed_ndp16) | |
311 | return -ENOMEM; | |
312 | } | |
313 | ||
314 | /* flush pending data before changing flag */ | |
315 | netif_tx_lock_bh(dev->net); | |
316 | usbnet_start_xmit(NULL, dev->net); | |
317 | spin_lock_bh(&ctx->mtx); | |
318 | if (enable) | |
319 | ctx->drvflags |= CDC_NCM_FLAG_NDP_TO_END; | |
320 | else | |
321 | ctx->drvflags &= ~CDC_NCM_FLAG_NDP_TO_END; | |
322 | spin_unlock_bh(&ctx->mtx); | |
323 | netif_tx_unlock_bh(dev->net); | |
324 | ||
325 | return len; | |
326 | } | |
327 | static DEVICE_ATTR_RW(ndp_to_end); | |
328 | ||
871578c9 BM |
329 | #define NCM_PARM_ATTR(name, format, tocpu) \ |
330 | static ssize_t cdc_ncm_show_##name(struct device *d, struct device_attribute *attr, char *buf) \ | |
331 | { \ | |
332 | struct usbnet *dev = netdev_priv(to_net_dev(d)); \ | |
333 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; \ | |
334 | return sprintf(buf, format "\n", tocpu(ctx->ncm_parm.name)); \ | |
335 | } \ | |
336 | static DEVICE_ATTR(name, S_IRUGO, cdc_ncm_show_##name, NULL) | |
337 | ||
338 | NCM_PARM_ATTR(bmNtbFormatsSupported, "0x%04x", le16_to_cpu); | |
339 | NCM_PARM_ATTR(dwNtbInMaxSize, "%u", le32_to_cpu); | |
340 | NCM_PARM_ATTR(wNdpInDivisor, "%u", le16_to_cpu); | |
341 | NCM_PARM_ATTR(wNdpInPayloadRemainder, "%u", le16_to_cpu); | |
342 | NCM_PARM_ATTR(wNdpInAlignment, "%u", le16_to_cpu); | |
343 | NCM_PARM_ATTR(dwNtbOutMaxSize, "%u", le32_to_cpu); | |
344 | NCM_PARM_ATTR(wNdpOutDivisor, "%u", le16_to_cpu); | |
345 | NCM_PARM_ATTR(wNdpOutPayloadRemainder, "%u", le16_to_cpu); | |
346 | NCM_PARM_ATTR(wNdpOutAlignment, "%u", le16_to_cpu); | |
347 | NCM_PARM_ATTR(wNtbOutMaxDatagrams, "%u", le16_to_cpu); | |
348 | ||
289507d3 | 349 | static struct attribute *cdc_ncm_sysfs_attrs[] = { |
39eb7e0e | 350 | &dev_attr_min_tx_pkt.attr, |
404814af | 351 | &dev_attr_ndp_to_end.attr, |
289507d3 BM |
352 | &dev_attr_rx_max.attr, |
353 | &dev_attr_tx_max.attr, | |
354 | &dev_attr_tx_timer_usecs.attr, | |
871578c9 BM |
355 | &dev_attr_bmNtbFormatsSupported.attr, |
356 | &dev_attr_dwNtbInMaxSize.attr, | |
357 | &dev_attr_wNdpInDivisor.attr, | |
358 | &dev_attr_wNdpInPayloadRemainder.attr, | |
359 | &dev_attr_wNdpInAlignment.attr, | |
360 | &dev_attr_dwNtbOutMaxSize.attr, | |
361 | &dev_attr_wNdpOutDivisor.attr, | |
362 | &dev_attr_wNdpOutPayloadRemainder.attr, | |
363 | &dev_attr_wNdpOutAlignment.attr, | |
364 | &dev_attr_wNtbOutMaxDatagrams.attr, | |
289507d3 BM |
365 | NULL, |
366 | }; | |
367 | ||
368 | static struct attribute_group cdc_ncm_sysfs_attr_group = { | |
369 | .name = "cdc_ncm", | |
370 | .attrs = cdc_ncm_sysfs_attrs, | |
371 | }; | |
372 | ||
373 | /* handle rx_max and tx_max changes */ | |
374 | static void cdc_ncm_update_rxtx_max(struct usbnet *dev, u32 new_rx, u32 new_tx) | |
375 | { | |
376 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
377 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
378 | u32 val; | |
379 | ||
380 | val = cdc_ncm_check_rx_max(dev, new_rx); | |
5aa73d5d BM |
381 | |
382 | /* inform device about NTB input size changes */ | |
383 | if (val != ctx->rx_max) { | |
384 | __le32 dwNtbInMaxSize = cpu_to_le32(val); | |
385 | ||
386 | dev_info(&dev->intf->dev, "setting rx_max = %u\n", val); | |
68864abf | 387 | |
68864abf | 388 | /* tell device to use new size */ |
5aa73d5d BM |
389 | if (usbnet_write_cmd(dev, USB_CDC_SET_NTB_INPUT_SIZE, |
390 | USB_TYPE_CLASS | USB_DIR_OUT | |
391 | | USB_RECIP_INTERFACE, | |
392 | 0, iface_no, &dwNtbInMaxSize, 4) < 0) | |
393 | dev_dbg(&dev->intf->dev, "Setting NTB Input Size failed\n"); | |
394 | else | |
395 | ctx->rx_max = val; | |
396 | } | |
397 | ||
f42763db BM |
398 | /* usbnet use these values for sizing rx queues */ |
399 | if (dev->rx_urb_size != ctx->rx_max) { | |
400 | dev->rx_urb_size = ctx->rx_max; | |
401 | if (netif_running(dev->net)) | |
402 | usbnet_unlink_rx_urbs(dev); | |
403 | } | |
404 | ||
289507d3 | 405 | val = cdc_ncm_check_tx_max(dev, new_tx); |
5aa73d5d BM |
406 | if (val != ctx->tx_max) |
407 | dev_info(&dev->intf->dev, "setting tx_max = %u\n", val); | |
08c74fc9 BM |
408 | |
409 | /* Adding a pad byte here if necessary simplifies the handling | |
410 | * in cdc_ncm_fill_tx_frame, making tx_max always represent | |
411 | * the real skb max size. | |
412 | * | |
413 | * We cannot use dev->maxpacket here because this is called from | |
414 | * .bind which is called before usbnet sets up dev->maxpacket | |
415 | */ | |
68864abf BM |
416 | if (val != le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize) && |
417 | val % usb_maxpacket(dev->udev, dev->out, 1) == 0) | |
418 | val++; | |
419 | ||
420 | /* we might need to flush any pending tx buffers if running */ | |
421 | if (netif_running(dev->net) && val > ctx->tx_max) { | |
422 | netif_tx_lock_bh(dev->net); | |
423 | usbnet_start_xmit(NULL, dev->net); | |
1ba5d0ff BM |
424 | /* make sure tx_curr_skb is reallocated if it was empty */ |
425 | if (ctx->tx_curr_skb) { | |
426 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
427 | ctx->tx_curr_skb = NULL; | |
428 | } | |
68864abf BM |
429 | ctx->tx_max = val; |
430 | netif_tx_unlock_bh(dev->net); | |
431 | } else { | |
432 | ctx->tx_max = val; | |
433 | } | |
08c74fc9 | 434 | |
08c74fc9 | 435 | dev->hard_mtu = ctx->tx_max; |
68864abf BM |
436 | |
437 | /* max qlen depend on hard_mtu and rx_urb_size */ | |
438 | usbnet_update_max_qlen(dev); | |
43e4c6df BM |
439 | |
440 | /* never pad more than 3 full USB packets per transfer */ | |
441 | ctx->min_tx_pkt = clamp_t(u16, ctx->tx_max - 3 * usb_maxpacket(dev->udev, dev->out, 1), | |
442 | CDC_NCM_MIN_TX_PKT, ctx->tx_max); | |
5aa73d5d BM |
443 | } |
444 | ||
f8afb73d BM |
445 | /* helpers for NCM and MBIM differences */ |
446 | static u8 cdc_ncm_flags(struct usbnet *dev) | |
900d495a | 447 | { |
bed6f762 | 448 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
900d495a | 449 | |
f8afb73d BM |
450 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) |
451 | return ctx->mbim_desc->bmNetworkCapabilities; | |
452 | if (ctx->func_desc) | |
453 | return ctx->func_desc->bmNetworkCapabilities; | |
454 | return 0; | |
455 | } | |
456 | ||
457 | static int cdc_ncm_eth_hlen(struct usbnet *dev) | |
458 | { | |
459 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
460 | return 0; | |
461 | return ETH_HLEN; | |
462 | } | |
463 | ||
464 | static u32 cdc_ncm_min_dgram_size(struct usbnet *dev) | |
465 | { | |
466 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting)) | |
467 | return CDC_MBIM_MIN_DATAGRAM_SIZE; | |
468 | return CDC_NCM_MIN_DATAGRAM_SIZE; | |
469 | } | |
470 | ||
471 | static u32 cdc_ncm_max_dgram_size(struct usbnet *dev) | |
472 | { | |
473 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
474 | ||
475 | if (cdc_ncm_comm_intf_is_mbim(dev->intf->cur_altsetting) && ctx->mbim_desc) | |
476 | return le16_to_cpu(ctx->mbim_desc->wMaxSegmentSize); | |
477 | if (ctx->ether_desc) | |
478 | return le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
479 | return CDC_NCM_MAX_DATAGRAM_SIZE; | |
480 | } | |
481 | ||
482 | /* initial one-time device setup. MUST be called with the data interface | |
483 | * in altsetting 0 | |
484 | */ | |
485 | static int cdc_ncm_init(struct usbnet *dev) | |
486 | { | |
487 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
488 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
489 | int err; | |
900d495a | 490 | |
90b8b037 ML |
491 | err = usbnet_read_cmd(dev, USB_CDC_GET_NTB_PARAMETERS, |
492 | USB_TYPE_CLASS | USB_DIR_IN | |
493 | |USB_RECIP_INTERFACE, | |
ff0992e9 BM |
494 | 0, iface_no, &ctx->ncm_parm, |
495 | sizeof(ctx->ncm_parm)); | |
36c35416 | 496 | if (err < 0) { |
59ede316 BM |
497 | dev_err(&dev->intf->dev, "failed GET_NTB_PARAMETERS\n"); |
498 | return err; /* GET_NTB_PARAMETERS is required */ | |
900d495a AO |
499 | } |
500 | ||
f8afb73d BM |
501 | /* set CRC Mode */ |
502 | if (cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_CRC_MODE) { | |
503 | dev_dbg(&dev->intf->dev, "Setting CRC mode off\n"); | |
504 | err = usbnet_write_cmd(dev, USB_CDC_SET_CRC_MODE, | |
505 | USB_TYPE_CLASS | USB_DIR_OUT | |
506 | | USB_RECIP_INTERFACE, | |
507 | USB_CDC_NCM_CRC_NOT_APPENDED, | |
508 | iface_no, NULL, 0); | |
509 | if (err < 0) | |
510 | dev_err(&dev->intf->dev, "SET_CRC_MODE failed\n"); | |
511 | } | |
512 | ||
513 | /* set NTB format, if both formats are supported. | |
514 | * | |
515 | * "The host shall only send this command while the NCM Data | |
516 | * Interface is in alternate setting 0." | |
517 | */ | |
d22adbfb DC |
518 | if (le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported) & |
519 | USB_CDC_NCM_NTB32_SUPPORTED) { | |
f8afb73d BM |
520 | dev_dbg(&dev->intf->dev, "Setting NTB format to 16-bit\n"); |
521 | err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT, | |
522 | USB_TYPE_CLASS | USB_DIR_OUT | |
523 | | USB_RECIP_INTERFACE, | |
524 | USB_CDC_NCM_NTB16_FORMAT, | |
525 | iface_no, NULL, 0); | |
526 | if (err < 0) | |
527 | dev_err(&dev->intf->dev, "SET_NTB_FORMAT failed\n"); | |
528 | } | |
529 | ||
530 | /* set initial device values */ | |
ff0992e9 BM |
531 | ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); |
532 | ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); | |
533 | ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); | |
534 | ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); | |
535 | ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); | |
84e77a8b | 536 | /* devices prior to NCM Errata shall set this field to zero */ |
ff0992e9 | 537 | ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); |
47175e5f | 538 | |
ae223cd4 BM |
539 | dev_dbg(&dev->intf->dev, |
540 | "dwNtbInMaxSize=%u dwNtbOutMaxSize=%u wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", | |
541 | ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, | |
f8afb73d | 542 | ctx->tx_ndp_modulus, ctx->tx_max_datagrams, cdc_ncm_flags(dev)); |
900d495a | 543 | |
84e77a8b AO |
544 | /* max count of tx datagrams */ |
545 | if ((ctx->tx_max_datagrams == 0) || | |
546 | (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) | |
547 | ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; | |
900d495a | 548 | |
70559b89 BM |
549 | /* set up maximum NDP size */ |
550 | ctx->max_ndp_size = sizeof(struct usb_cdc_ncm_ndp16) + (ctx->tx_max_datagrams + 1) * sizeof(struct usb_cdc_ncm_dpe16); | |
551 | ||
6c4e548f BM |
552 | /* initial coalescing timer interval */ |
553 | ctx->timer_interval = CDC_NCM_TIMER_INTERVAL_USEC * NSEC_PER_USEC; | |
554 | ||
f8afb73d BM |
555 | return 0; |
556 | } | |
557 | ||
558 | /* set a new max datagram size */ | |
559 | static void cdc_ncm_set_dgram_size(struct usbnet *dev, int new_size) | |
560 | { | |
561 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
562 | u8 iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
563 | __le16 max_datagram_size; | |
564 | u16 mbim_mtu; | |
565 | int err; | |
566 | ||
567 | /* set default based on descriptors */ | |
568 | ctx->max_datagram_size = clamp_t(u32, new_size, | |
569 | cdc_ncm_min_dgram_size(dev), | |
570 | CDC_NCM_MAX_DATAGRAM_SIZE); | |
571 | ||
572 | /* inform the device about the selected Max Datagram Size? */ | |
573 | if (!(cdc_ncm_flags(dev) & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE)) | |
574 | goto out; | |
575 | ||
576 | /* read current mtu value from device */ | |
577 | err = usbnet_read_cmd(dev, USB_CDC_GET_MAX_DATAGRAM_SIZE, | |
578 | USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE, | |
579 | 0, iface_no, &max_datagram_size, 2); | |
580 | if (err < 0) { | |
581 | dev_dbg(&dev->intf->dev, "GET_MAX_DATAGRAM_SIZE failed\n"); | |
582 | goto out; | |
583 | } | |
584 | ||
585 | if (le16_to_cpu(max_datagram_size) == ctx->max_datagram_size) | |
586 | goto out; | |
587 | ||
588 | max_datagram_size = cpu_to_le16(ctx->max_datagram_size); | |
589 | err = usbnet_write_cmd(dev, USB_CDC_SET_MAX_DATAGRAM_SIZE, | |
590 | USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
591 | 0, iface_no, &max_datagram_size, 2); | |
592 | if (err < 0) | |
593 | dev_dbg(&dev->intf->dev, "SET_MAX_DATAGRAM_SIZE failed\n"); | |
594 | ||
595 | out: | |
596 | /* set MTU to max supported by the device if necessary */ | |
597 | dev->net->mtu = min_t(int, dev->net->mtu, ctx->max_datagram_size - cdc_ncm_eth_hlen(dev)); | |
598 | ||
599 | /* do not exceed operater preferred MTU */ | |
600 | if (ctx->mbim_extended_desc) { | |
601 | mbim_mtu = le16_to_cpu(ctx->mbim_extended_desc->wMTU); | |
602 | if (mbim_mtu != 0 && mbim_mtu < dev->net->mtu) | |
603 | dev->net->mtu = mbim_mtu; | |
604 | } | |
605 | } | |
606 | ||
607 | static void cdc_ncm_fix_modulus(struct usbnet *dev) | |
608 | { | |
609 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
610 | u32 val; | |
900d495a AO |
611 | |
612 | /* | |
613 | * verify that the structure alignment is: | |
614 | * - power of two | |
615 | * - not greater than the maximum transmit length | |
616 | * - not less than four bytes | |
617 | */ | |
618 | val = ctx->tx_ndp_modulus; | |
619 | ||
620 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
621 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 622 | dev_dbg(&dev->intf->dev, "Using default alignment: 4 bytes\n"); |
900d495a AO |
623 | ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
624 | } | |
625 | ||
626 | /* | |
627 | * verify that the payload alignment is: | |
628 | * - power of two | |
629 | * - not greater than the maximum transmit length | |
630 | * - not less than four bytes | |
631 | */ | |
632 | val = ctx->tx_modulus; | |
633 | ||
634 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
635 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
ae223cd4 | 636 | dev_dbg(&dev->intf->dev, "Using default transmit modulus: 4 bytes\n"); |
900d495a AO |
637 | ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; |
638 | } | |
639 | ||
640 | /* verify the payload remainder */ | |
641 | if (ctx->tx_remainder >= ctx->tx_modulus) { | |
ae223cd4 | 642 | dev_dbg(&dev->intf->dev, "Using default transmit remainder: 0 bytes\n"); |
900d495a AO |
643 | ctx->tx_remainder = 0; |
644 | } | |
645 | ||
646 | /* adjust TX-remainder according to NCM specification. */ | |
f8afb73d | 647 | ctx->tx_remainder = ((ctx->tx_remainder - cdc_ncm_eth_hlen(dev)) & |
2d1c4310 | 648 | (ctx->tx_modulus - 1)); |
f8afb73d | 649 | } |
900d495a | 650 | |
f8afb73d BM |
651 | static int cdc_ncm_setup(struct usbnet *dev) |
652 | { | |
653 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
50f1cb1c BM |
654 | u32 def_rx, def_tx; |
655 | ||
656 | /* be conservative when selecting intial buffer size to | |
657 | * increase the number of hosts this will work for | |
658 | */ | |
659 | def_rx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_RX, | |
660 | le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)); | |
661 | def_tx = min_t(u32, CDC_NCM_NTB_DEF_SIZE_TX, | |
662 | le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)); | |
900d495a | 663 | |
f8afb73d | 664 | /* clamp rx_max and tx_max and inform device */ |
50f1cb1c | 665 | cdc_ncm_update_rxtx_max(dev, def_rx, def_tx); |
259fef03 | 666 | |
f8afb73d BM |
667 | /* sanitize the modulus and remainder values */ |
668 | cdc_ncm_fix_modulus(dev); | |
259fef03 | 669 | |
f8afb73d BM |
670 | /* set max datagram size */ |
671 | cdc_ncm_set_dgram_size(dev, cdc_ncm_max_dgram_size(dev)); | |
900d495a AO |
672 | return 0; |
673 | } | |
674 | ||
675 | static void | |
ff1632aa | 676 | cdc_ncm_find_endpoints(struct usbnet *dev, struct usb_interface *intf) |
900d495a | 677 | { |
ff1632aa | 678 | struct usb_host_endpoint *e, *in = NULL, *out = NULL; |
900d495a AO |
679 | u8 ep; |
680 | ||
681 | for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { | |
682 | ||
683 | e = intf->cur_altsetting->endpoint + ep; | |
684 | switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
685 | case USB_ENDPOINT_XFER_INT: | |
686 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
687 | if (!dev->status) |
688 | dev->status = e; | |
900d495a AO |
689 | } |
690 | break; | |
691 | ||
692 | case USB_ENDPOINT_XFER_BULK: | |
693 | if (usb_endpoint_dir_in(&e->desc)) { | |
ff1632aa BM |
694 | if (!in) |
695 | in = e; | |
900d495a | 696 | } else { |
ff1632aa BM |
697 | if (!out) |
698 | out = e; | |
900d495a AO |
699 | } |
700 | break; | |
701 | ||
702 | default: | |
703 | break; | |
704 | } | |
705 | } | |
ff1632aa BM |
706 | if (in && !dev->in) |
707 | dev->in = usb_rcvbulkpipe(dev->udev, | |
708 | in->desc.bEndpointAddress & | |
709 | USB_ENDPOINT_NUMBER_MASK); | |
710 | if (out && !dev->out) | |
711 | dev->out = usb_sndbulkpipe(dev->udev, | |
712 | out->desc.bEndpointAddress & | |
713 | USB_ENDPOINT_NUMBER_MASK); | |
900d495a AO |
714 | } |
715 | ||
716 | static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) | |
717 | { | |
718 | if (ctx == NULL) | |
719 | return; | |
720 | ||
900d495a AO |
721 | if (ctx->tx_rem_skb != NULL) { |
722 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
723 | ctx->tx_rem_skb = NULL; | |
724 | } | |
725 | ||
726 | if (ctx->tx_curr_skb != NULL) { | |
727 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
728 | ctx->tx_curr_skb = NULL; | |
729 | } | |
730 | ||
4a0e3e98 EM |
731 | kfree(ctx->delayed_ndp16); |
732 | ||
900d495a AO |
733 | kfree(ctx); |
734 | } | |
735 | ||
1dfddff5 BM |
736 | /* we need to override the usbnet change_mtu ndo for two reasons: |
737 | * - respect the negotiated maximum datagram size | |
738 | * - avoid unwanted changes to rx and tx buffers | |
739 | */ | |
740 | int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) | |
741 | { | |
742 | struct usbnet *dev = netdev_priv(net); | |
05a56487 | 743 | int maxmtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); |
1dfddff5 BM |
744 | |
745 | if (new_mtu <= 0 || new_mtu > maxmtu) | |
746 | return -EINVAL; | |
05a56487 | 747 | |
1dfddff5 | 748 | net->mtu = new_mtu; |
05a56487 RR |
749 | cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); |
750 | ||
1dfddff5 BM |
751 | return 0; |
752 | } | |
753 | EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); | |
754 | ||
755 | static const struct net_device_ops cdc_ncm_netdev_ops = { | |
756 | .ndo_open = usbnet_open, | |
757 | .ndo_stop = usbnet_stop, | |
758 | .ndo_start_xmit = usbnet_start_xmit, | |
759 | .ndo_tx_timeout = usbnet_tx_timeout, | |
760 | .ndo_change_mtu = cdc_ncm_change_mtu, | |
761 | .ndo_set_mac_address = eth_mac_addr, | |
762 | .ndo_validate_addr = eth_validate_addr, | |
763 | }; | |
764 | ||
4a0e3e98 | 765 | int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) |
900d495a AO |
766 | { |
767 | struct cdc_ncm_ctx *ctx; | |
768 | struct usb_driver *driver; | |
769 | u8 *buf; | |
770 | int len; | |
771 | int temp; | |
772 | u8 iface_no; | |
77b0a099 | 773 | struct usb_cdc_parsed_header hdr; |
900d495a | 774 | |
c796984f | 775 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); |
8f0923c1 DN |
776 | if (!ctx) |
777 | return -ENOMEM; | |
900d495a | 778 | |
c84ff1d6 AO |
779 | hrtimer_init(&ctx->tx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
780 | ctx->tx_timer.function = &cdc_ncm_tx_timer_cb; | |
bed6f762 | 781 | ctx->bh.data = (unsigned long)dev; |
c84ff1d6 AO |
782 | ctx->bh.func = cdc_ncm_txpath_bh; |
783 | atomic_set(&ctx->stop, 0); | |
900d495a | 784 | spin_lock_init(&ctx->mtx); |
900d495a AO |
785 | |
786 | /* store ctx pointer in device data field */ | |
787 | dev->data[0] = (unsigned long)ctx; | |
788 | ||
9fe0234c BM |
789 | /* only the control interface can be successfully probed */ |
790 | ctx->control = intf; | |
791 | ||
900d495a AO |
792 | /* get some pointers */ |
793 | driver = driver_of(intf); | |
794 | buf = intf->cur_altsetting->extra; | |
795 | len = intf->cur_altsetting->extralen; | |
796 | ||
900d495a | 797 | /* parse through descriptors associated with control interface */ |
77b0a099 ON |
798 | cdc_parse_cdc_header(&hdr, intf, buf, len); |
799 | ||
6527f833 BM |
800 | if (hdr.usb_cdc_union_desc) |
801 | ctx->data = usb_ifnum_to_if(dev->udev, | |
802 | hdr.usb_cdc_union_desc->bSlaveInterface0); | |
77b0a099 ON |
803 | ctx->ether_desc = hdr.usb_cdc_ether_desc; |
804 | ctx->func_desc = hdr.usb_cdc_ncm_desc; | |
805 | ctx->mbim_desc = hdr.usb_cdc_mbim_desc; | |
806 | ctx->mbim_extended_desc = hdr.usb_cdc_mbim_extended_desc; | |
900d495a | 807 | |
9992c2e2 | 808 | /* some buggy devices have an IAD but no CDC Union */ |
6527f833 | 809 | if (!hdr.usb_cdc_union_desc && intf->intf_assoc && intf->intf_assoc->bInterfaceCount == 2) { |
56a666dc BM |
810 | ctx->data = usb_ifnum_to_if(dev->udev, intf->cur_altsetting->desc.bInterfaceNumber + 1); |
811 | dev_dbg(&intf->dev, "CDC Union missing - got slave from IAD\n"); | |
9992c2e2 BM |
812 | } |
813 | ||
900d495a | 814 | /* check if we got everything */ |
f8afb73d BM |
815 | if (!ctx->data) { |
816 | dev_dbg(&intf->dev, "CDC Union missing and no IAD found\n"); | |
900d495a | 817 | goto error; |
296e81f8 | 818 | } |
f8afb73d BM |
819 | if (cdc_ncm_comm_intf_is_mbim(intf->cur_altsetting)) { |
820 | if (!ctx->mbim_desc) { | |
821 | dev_dbg(&intf->dev, "MBIM functional descriptor missing\n"); | |
822 | goto error; | |
823 | } | |
824 | } else { | |
825 | if (!ctx->ether_desc || !ctx->func_desc) { | |
826 | dev_dbg(&intf->dev, "NCM or ECM functional descriptors missing\n"); | |
827 | goto error; | |
828 | } | |
829 | } | |
900d495a | 830 | |
bbc8d922 BM |
831 | /* claim data interface, if different from control */ |
832 | if (ctx->data != ctx->control) { | |
833 | temp = usb_driver_claim_interface(driver, ctx->data, dev); | |
296e81f8 BM |
834 | if (temp) { |
835 | dev_dbg(&intf->dev, "failed to claim data intf\n"); | |
bbc8d922 | 836 | goto error; |
296e81f8 | 837 | } |
bbc8d922 | 838 | } |
900d495a AO |
839 | |
840 | iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; | |
841 | ||
48906f62 BM |
842 | /* Reset data interface. Some devices will not reset properly |
843 | * unless they are configured first. Toggle the altsetting to | |
844 | * force a reset | |
845 | */ | |
846 | usb_set_interface(dev->udev, iface_no, data_altsetting); | |
900d495a | 847 | temp = usb_set_interface(dev->udev, iface_no, 0); |
296e81f8 BM |
848 | if (temp) { |
849 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 850 | goto error2; |
296e81f8 | 851 | } |
900d495a | 852 | |
08c74fc9 BM |
853 | /* initialize basic device settings */ |
854 | if (cdc_ncm_init(dev)) | |
ff0992e9 BM |
855 | goto error2; |
856 | ||
c086e709 BM |
857 | /* Some firmwares need a pause here or they will silently fail |
858 | * to set up the interface properly. This value was decided | |
859 | * empirically on a Sierra Wireless MC7455 running 02.08.02.00 | |
860 | * firmware. | |
861 | */ | |
862 | usleep_range(10000, 20000); | |
863 | ||
900d495a | 864 | /* configure data interface */ |
38396e4c | 865 | temp = usb_set_interface(dev->udev, iface_no, data_altsetting); |
296e81f8 BM |
866 | if (temp) { |
867 | dev_dbg(&intf->dev, "set interface failed\n"); | |
19694ac8 | 868 | goto error2; |
296e81f8 | 869 | } |
900d495a | 870 | |
ff1632aa BM |
871 | cdc_ncm_find_endpoints(dev, ctx->data); |
872 | cdc_ncm_find_endpoints(dev, ctx->control); | |
296e81f8 BM |
873 | if (!dev->in || !dev->out || !dev->status) { |
874 | dev_dbg(&intf->dev, "failed to collect endpoints\n"); | |
19694ac8 | 875 | goto error2; |
296e81f8 | 876 | } |
900d495a | 877 | |
900d495a AO |
878 | usb_set_intfdata(ctx->data, dev); |
879 | usb_set_intfdata(ctx->control, dev); | |
900d495a | 880 | |
38396e4c GS |
881 | if (ctx->ether_desc) { |
882 | temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); | |
296e81f8 BM |
883 | if (temp) { |
884 | dev_dbg(&intf->dev, "failed to get mac address\n"); | |
38396e4c | 885 | goto error2; |
296e81f8 BM |
886 | } |
887 | dev_info(&intf->dev, "MAC-Address: %pM\n", dev->net->dev_addr); | |
38396e4c | 888 | } |
900d495a | 889 | |
08c74fc9 BM |
890 | /* finish setting up the device specific data */ |
891 | cdc_ncm_setup(dev); | |
ff0992e9 | 892 | |
4a0e3e98 EM |
893 | /* Device-specific flags */ |
894 | ctx->drvflags = drvflags; | |
895 | ||
896 | /* Allocate the delayed NDP if needed. */ | |
897 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
898 | ctx->delayed_ndp16 = kzalloc(ctx->max_ndp_size, GFP_KERNEL); | |
899 | if (!ctx->delayed_ndp16) | |
900 | goto error2; | |
901 | dev_info(&intf->dev, "NDP will be placed at end of frame for this device."); | |
902 | } | |
903 | ||
6c4e548f BM |
904 | /* override ethtool_ops */ |
905 | dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; | |
906 | ||
289507d3 BM |
907 | /* add our sysfs attrs */ |
908 | dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; | |
909 | ||
1dfddff5 BM |
910 | /* must handle MTU changes */ |
911 | dev->net->netdev_ops = &cdc_ncm_netdev_ops; | |
912 | ||
900d495a AO |
913 | return 0; |
914 | ||
19694ac8 AO |
915 | error2: |
916 | usb_set_intfdata(ctx->control, NULL); | |
917 | usb_set_intfdata(ctx->data, NULL); | |
6b4ef602 BM |
918 | if (ctx->data != ctx->control) |
919 | usb_driver_release_interface(driver, ctx->data); | |
900d495a AO |
920 | error: |
921 | cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); | |
922 | dev->data[0] = 0; | |
296e81f8 | 923 | dev_info(&intf->dev, "bind() failure\n"); |
900d495a AO |
924 | return -ENODEV; |
925 | } | |
c91ce3b6 | 926 | EXPORT_SYMBOL_GPL(cdc_ncm_bind_common); |
900d495a | 927 | |
c91ce3b6 | 928 | void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) |
900d495a AO |
929 | { |
930 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
19694ac8 | 931 | struct usb_driver *driver = driver_of(intf); |
900d495a AO |
932 | |
933 | if (ctx == NULL) | |
934 | return; /* no setup */ | |
935 | ||
c84ff1d6 AO |
936 | atomic_set(&ctx->stop, 1); |
937 | ||
938 | if (hrtimer_active(&ctx->tx_timer)) | |
939 | hrtimer_cancel(&ctx->tx_timer); | |
940 | ||
941 | tasklet_kill(&ctx->bh); | |
942 | ||
bbc8d922 BM |
943 | /* handle devices with combined control and data interface */ |
944 | if (ctx->control == ctx->data) | |
945 | ctx->data = NULL; | |
946 | ||
19694ac8 AO |
947 | /* disconnect master --> disconnect slave */ |
948 | if (intf == ctx->control && ctx->data) { | |
949 | usb_set_intfdata(ctx->data, NULL); | |
900d495a | 950 | usb_driver_release_interface(driver, ctx->data); |
19694ac8 | 951 | ctx->data = NULL; |
900d495a | 952 | |
19694ac8 AO |
953 | } else if (intf == ctx->data && ctx->control) { |
954 | usb_set_intfdata(ctx->control, NULL); | |
900d495a | 955 | usb_driver_release_interface(driver, ctx->control); |
19694ac8 | 956 | ctx->control = NULL; |
900d495a AO |
957 | } |
958 | ||
3e515665 | 959 | usb_set_intfdata(intf, NULL); |
900d495a AO |
960 | cdc_ncm_free(ctx); |
961 | } | |
c91ce3b6 | 962 | EXPORT_SYMBOL_GPL(cdc_ncm_unbind); |
900d495a | 963 | |
50a0ffaf BM |
964 | /* Return the number of the MBIM control interface altsetting iff it |
965 | * is preferred and available, | |
1e8bbe6c | 966 | */ |
50a0ffaf | 967 | u8 cdc_ncm_select_altsetting(struct usb_interface *intf) |
38396e4c | 968 | { |
1e8bbe6c | 969 | struct usb_host_interface *alt; |
38396e4c | 970 | |
bd329e12 BM |
971 | /* The MBIM spec defines a NCM compatible default altsetting, |
972 | * which we may have matched: | |
973 | * | |
974 | * "Functions that implement both NCM 1.0 and MBIM (an | |
975 | * “NCM/MBIM function”) according to this recommendation | |
976 | * shall provide two alternate settings for the | |
977 | * Communication Interface. Alternate setting 0, and the | |
978 | * associated class and endpoint descriptors, shall be | |
979 | * constructed according to the rules given for the | |
980 | * Communication Interface in section 5 of [USBNCM10]. | |
981 | * Alternate setting 1, and the associated class and | |
982 | * endpoint descriptors, shall be constructed according to | |
983 | * the rules given in section 6 (USB Device Model) of this | |
984 | * specification." | |
bd329e12 | 985 | */ |
50a0ffaf BM |
986 | if (intf->num_altsetting < 2) |
987 | return intf->cur_altsetting->desc.bAlternateSetting; | |
988 | ||
989 | if (prefer_mbim) { | |
1e8bbe6c | 990 | alt = usb_altnum_to_altsetting(intf, CDC_NCM_COMM_ALTSETTING_MBIM); |
50a0ffaf BM |
991 | if (alt && cdc_ncm_comm_intf_is_mbim(alt)) |
992 | return CDC_NCM_COMM_ALTSETTING_MBIM; | |
f350ca03 | 993 | } |
50a0ffaf | 994 | return CDC_NCM_COMM_ALTSETTING_NCM; |
1e8bbe6c BM |
995 | } |
996 | EXPORT_SYMBOL_GPL(cdc_ncm_select_altsetting); | |
997 | ||
998 | static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) | |
999 | { | |
1e8bbe6c | 1000 | /* MBIM backwards compatible function? */ |
50a0ffaf | 1001 | if (cdc_ncm_select_altsetting(intf) != CDC_NCM_COMM_ALTSETTING_NCM) |
1e8bbe6c | 1002 | return -ENODEV; |
bd329e12 | 1003 | |
4a0e3e98 EM |
1004 | /* The NCM data altsetting is fixed, so we hard-coded it. |
1005 | * Additionally, generic NCM devices are assumed to accept arbitrarily | |
1006 | * placed NDP. | |
1007 | */ | |
4d06dd53 | 1008 | return cdc_ncm_bind_common(dev, intf, CDC_NCM_DATA_ALTSETTING_NCM, 0); |
38396e4c GS |
1009 | } |
1010 | ||
c78b7c58 | 1011 | static void cdc_ncm_align_tail(struct sk_buff *skb, size_t modulus, size_t remainder, size_t max) |
900d495a | 1012 | { |
c78b7c58 BM |
1013 | size_t align = ALIGN(skb->len, modulus) - skb->len + remainder; |
1014 | ||
1015 | if (skb->len + align > max) | |
1016 | align = max - skb->len; | |
1017 | if (align && skb_tailroom(skb) >= align) | |
1018 | memset(skb_put(skb, align), 0, align); | |
1019 | } | |
1020 | ||
1021 | /* return a pointer to a valid struct usb_cdc_ncm_ndp16 of type sign, possibly | |
1022 | * allocating a new one within skb | |
1023 | */ | |
1024 | static struct usb_cdc_ncm_ndp16 *cdc_ncm_ndp(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign, size_t reserve) | |
1025 | { | |
1026 | struct usb_cdc_ncm_ndp16 *ndp16 = NULL; | |
1027 | struct usb_cdc_ncm_nth16 *nth16 = (void *)skb->data; | |
1028 | size_t ndpoffset = le16_to_cpu(nth16->wNdpIndex); | |
1029 | ||
4a0e3e98 EM |
1030 | /* If NDP should be moved to the end of the NCM package, we can't follow the |
1031 | * NTH16 header as we would normally do. NDP isn't written to the SKB yet, and | |
1032 | * the wNdpIndex field in the header is actually not consistent with reality. It will be later. | |
1033 | */ | |
f8c0cfa5 | 1034 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { |
4a0e3e98 EM |
1035 | if (ctx->delayed_ndp16->dwSignature == sign) |
1036 | return ctx->delayed_ndp16; | |
1037 | ||
f8c0cfa5 BM |
1038 | /* We can only push a single NDP to the end. Return |
1039 | * NULL to send what we've already got and queue this | |
1040 | * skb for later. | |
1041 | */ | |
1042 | else if (ctx->delayed_ndp16->dwSignature) | |
1043 | return NULL; | |
1044 | } | |
1045 | ||
c78b7c58 BM |
1046 | /* follow the chain of NDPs, looking for a match */ |
1047 | while (ndpoffset) { | |
1048 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb->data + ndpoffset); | |
1049 | if (ndp16->dwSignature == sign) | |
1050 | return ndp16; | |
1051 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1052 | } | |
1053 | ||
1054 | /* align new NDP */ | |
4a0e3e98 EM |
1055 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) |
1056 | cdc_ncm_align_tail(skb, ctx->tx_ndp_modulus, 0, ctx->tx_max); | |
c78b7c58 BM |
1057 | |
1058 | /* verify that there is room for the NDP and the datagram (reserve) */ | |
70559b89 | 1059 | if ((ctx->tx_max - skb->len - reserve) < ctx->max_ndp_size) |
c78b7c58 BM |
1060 | return NULL; |
1061 | ||
1062 | /* link to it */ | |
1063 | if (ndp16) | |
1064 | ndp16->wNextNdpIndex = cpu_to_le16(skb->len); | |
1065 | else | |
1066 | nth16->wNdpIndex = cpu_to_le16(skb->len); | |
1067 | ||
1068 | /* push a new empty NDP */ | |
4a0e3e98 EM |
1069 | if (!(ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END)) |
1070 | ndp16 = (struct usb_cdc_ncm_ndp16 *)memset(skb_put(skb, ctx->max_ndp_size), 0, ctx->max_ndp_size); | |
1071 | else | |
1072 | ndp16 = ctx->delayed_ndp16; | |
1073 | ||
c78b7c58 BM |
1074 | ndp16->dwSignature = sign; |
1075 | ndp16->wLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_ndp16) + sizeof(struct usb_cdc_ncm_dpe16)); | |
1076 | return ndp16; | |
900d495a AO |
1077 | } |
1078 | ||
c91ce3b6 | 1079 | struct sk_buff * |
bed6f762 | 1080 | cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) |
900d495a | 1081 | { |
bed6f762 | 1082 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; |
c78b7c58 BM |
1083 | struct usb_cdc_ncm_nth16 *nth16; |
1084 | struct usb_cdc_ncm_ndp16 *ndp16; | |
900d495a | 1085 | struct sk_buff *skb_out; |
c78b7c58 | 1086 | u16 n = 0, index, ndplen; |
84e77a8b | 1087 | u8 ready2send = 0; |
4a0e3e98 EM |
1088 | u32 delayed_ndp_size; |
1089 | ||
1090 | /* When our NDP gets written in cdc_ncm_ndp(), then skb_out->len gets updated | |
1091 | * accordingly. Otherwise, we should check here. | |
1092 | */ | |
1093 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) | |
1094 | delayed_ndp_size = ctx->max_ndp_size; | |
1095 | else | |
1096 | delayed_ndp_size = 0; | |
900d495a AO |
1097 | |
1098 | /* if there is a remaining skb, it gets priority */ | |
c78b7c58 | 1099 | if (skb != NULL) { |
900d495a | 1100 | swap(skb, ctx->tx_rem_skb); |
c78b7c58 BM |
1101 | swap(sign, ctx->tx_rem_sign); |
1102 | } else { | |
84e77a8b | 1103 | ready2send = 1; |
c78b7c58 | 1104 | } |
900d495a AO |
1105 | |
1106 | /* check if we are resuming an OUT skb */ | |
c78b7c58 | 1107 | skb_out = ctx->tx_curr_skb; |
900d495a | 1108 | |
c78b7c58 BM |
1109 | /* allocate a new OUT skb */ |
1110 | if (!skb_out) { | |
20572226 | 1111 | skb_out = alloc_skb(ctx->tx_max, GFP_ATOMIC); |
900d495a AO |
1112 | if (skb_out == NULL) { |
1113 | if (skb != NULL) { | |
1114 | dev_kfree_skb_any(skb); | |
bed6f762 | 1115 | dev->net->stats.tx_dropped++; |
900d495a AO |
1116 | } |
1117 | goto exit_no_skb; | |
1118 | } | |
c78b7c58 BM |
1119 | /* fill out the initial 16-bit NTB header */ |
1120 | nth16 = (struct usb_cdc_ncm_nth16 *)memset(skb_put(skb_out, sizeof(struct usb_cdc_ncm_nth16)), 0, sizeof(struct usb_cdc_ncm_nth16)); | |
1121 | nth16->dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); | |
1122 | nth16->wHeaderLength = cpu_to_le16(sizeof(struct usb_cdc_ncm_nth16)); | |
1123 | nth16->wSequence = cpu_to_le16(ctx->tx_seq++); | |
900d495a | 1124 | |
c78b7c58 | 1125 | /* count total number of frames in this NTB */ |
900d495a | 1126 | ctx->tx_curr_frame_num = 0; |
beeecd42 BM |
1127 | |
1128 | /* recent payload counter for this skb_out */ | |
1129 | ctx->tx_curr_frame_payload = 0; | |
900d495a AO |
1130 | } |
1131 | ||
c78b7c58 BM |
1132 | for (n = ctx->tx_curr_frame_num; n < ctx->tx_max_datagrams; n++) { |
1133 | /* send any remaining skb first */ | |
900d495a AO |
1134 | if (skb == NULL) { |
1135 | skb = ctx->tx_rem_skb; | |
c78b7c58 | 1136 | sign = ctx->tx_rem_sign; |
900d495a AO |
1137 | ctx->tx_rem_skb = NULL; |
1138 | ||
1139 | /* check for end of skb */ | |
1140 | if (skb == NULL) | |
1141 | break; | |
1142 | } | |
1143 | ||
c78b7c58 BM |
1144 | /* get the appropriate NDP for this skb */ |
1145 | ndp16 = cdc_ncm_ndp(ctx, skb_out, sign, skb->len + ctx->tx_modulus + ctx->tx_remainder); | |
1146 | ||
1147 | /* align beginning of next frame */ | |
1148 | cdc_ncm_align_tail(skb_out, ctx->tx_modulus, ctx->tx_remainder, ctx->tx_max); | |
1149 | ||
1150 | /* check if we had enough room left for both NDP and frame */ | |
4a0e3e98 | 1151 | if (!ndp16 || skb_out->len + skb->len + delayed_ndp_size > ctx->tx_max) { |
900d495a AO |
1152 | if (n == 0) { |
1153 | /* won't fit, MTU problem? */ | |
1154 | dev_kfree_skb_any(skb); | |
1155 | skb = NULL; | |
bed6f762 | 1156 | dev->net->stats.tx_dropped++; |
900d495a AO |
1157 | } else { |
1158 | /* no room for skb - store for later */ | |
1159 | if (ctx->tx_rem_skb != NULL) { | |
1160 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
bed6f762 | 1161 | dev->net->stats.tx_dropped++; |
900d495a AO |
1162 | } |
1163 | ctx->tx_rem_skb = skb; | |
c78b7c58 | 1164 | ctx->tx_rem_sign = sign; |
900d495a | 1165 | skb = NULL; |
84e77a8b | 1166 | ready2send = 1; |
beeecd42 | 1167 | ctx->tx_reason_ntb_full++; /* count reason for transmitting */ |
900d495a AO |
1168 | } |
1169 | break; | |
1170 | } | |
1171 | ||
c78b7c58 BM |
1172 | /* calculate frame number withing this NDP */ |
1173 | ndplen = le16_to_cpu(ndp16->wLength); | |
1174 | index = (ndplen - sizeof(struct usb_cdc_ncm_ndp16)) / sizeof(struct usb_cdc_ncm_dpe16) - 1; | |
900d495a | 1175 | |
c78b7c58 BM |
1176 | /* OK, add this skb */ |
1177 | ndp16->dpe16[index].wDatagramLength = cpu_to_le16(skb->len); | |
1178 | ndp16->dpe16[index].wDatagramIndex = cpu_to_le16(skb_out->len); | |
1179 | ndp16->wLength = cpu_to_le16(ndplen + sizeof(struct usb_cdc_ncm_dpe16)); | |
1180 | memcpy(skb_put(skb_out, skb->len), skb->data, skb->len); | |
beeecd42 | 1181 | ctx->tx_curr_frame_payload += skb->len; /* count real tx payload data */ |
900d495a AO |
1182 | dev_kfree_skb_any(skb); |
1183 | skb = NULL; | |
c78b7c58 BM |
1184 | |
1185 | /* send now if this NDP is full */ | |
1186 | if (index >= CDC_NCM_DPT_DATAGRAMS_MAX) { | |
1187 | ready2send = 1; | |
beeecd42 | 1188 | ctx->tx_reason_ndp_full++; /* count reason for transmitting */ |
c78b7c58 BM |
1189 | break; |
1190 | } | |
900d495a AO |
1191 | } |
1192 | ||
1193 | /* free up any dangling skb */ | |
1194 | if (skb != NULL) { | |
1195 | dev_kfree_skb_any(skb); | |
1196 | skb = NULL; | |
bed6f762 | 1197 | dev->net->stats.tx_dropped++; |
900d495a AO |
1198 | } |
1199 | ||
1200 | ctx->tx_curr_frame_num = n; | |
1201 | ||
1202 | if (n == 0) { | |
1203 | /* wait for more frames */ | |
1204 | /* push variables */ | |
1205 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
1206 | goto exit_no_skb; |
1207 | ||
6c4e548f | 1208 | } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0) && (ctx->timer_interval > 0)) { |
900d495a AO |
1209 | /* wait for more frames */ |
1210 | /* push variables */ | |
1211 | ctx->tx_curr_skb = skb_out; | |
900d495a AO |
1212 | /* set the pending count */ |
1213 | if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) | |
c84ff1d6 | 1214 | ctx->tx_timer_pending = CDC_NCM_TIMER_PENDING_CNT; |
900d495a AO |
1215 | goto exit_no_skb; |
1216 | ||
1217 | } else { | |
beeecd42 BM |
1218 | if (n == ctx->tx_max_datagrams) |
1219 | ctx->tx_reason_max_datagram++; /* count reason for transmitting */ | |
900d495a AO |
1220 | /* frame goes out */ |
1221 | /* variables will be reset at next call */ | |
1222 | } | |
1223 | ||
4a0e3e98 EM |
1224 | /* If requested, put NDP at end of frame. */ |
1225 | if (ctx->drvflags & CDC_NCM_FLAG_NDP_TO_END) { | |
1226 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
1227 | cdc_ncm_align_tail(skb_out, ctx->tx_ndp_modulus, 0, ctx->tx_max); | |
1228 | nth16->wNdpIndex = cpu_to_le16(skb_out->len); | |
1229 | memcpy(skb_put(skb_out, ctx->max_ndp_size), ctx->delayed_ndp16, ctx->max_ndp_size); | |
1230 | ||
1231 | /* Zero out delayed NDP - signature checking will naturally fail. */ | |
1232 | ndp16 = memset(ctx->delayed_ndp16, 0, ctx->max_ndp_size); | |
1233 | } | |
1234 | ||
43e4c6df | 1235 | /* If collected data size is less or equal ctx->min_tx_pkt |
20572226 BM |
1236 | * bytes, we send buffers as it is. If we get more data, it |
1237 | * would be more efficient for USB HS mobile device with DMA | |
1238 | * engine to receive a full size NTB, than canceling DMA | |
1239 | * transfer and receiving a short packet. | |
4d619f62 BM |
1240 | * |
1241 | * This optimization support is pointless if we end up sending | |
1242 | * a ZLP after full sized NTBs. | |
900d495a | 1243 | */ |
4d619f62 | 1244 | if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && |
43e4c6df | 1245 | skb_out->len > ctx->min_tx_pkt) |
20572226 BM |
1246 | memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, |
1247 | ctx->tx_max - skb_out->len); | |
9becd707 | 1248 | else if (skb_out->len < ctx->tx_max && (skb_out->len % dev->maxpacket) == 0) |
c78b7c58 | 1249 | *skb_put(skb_out, 1) = 0; /* force short packet */ |
900d495a | 1250 | |
c78b7c58 BM |
1251 | /* set final frame length */ |
1252 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_out->data; | |
1253 | nth16->wBlockLength = cpu_to_le16(skb_out->len); | |
900d495a AO |
1254 | |
1255 | /* return skb */ | |
1256 | ctx->tx_curr_skb = NULL; | |
beeecd42 BM |
1257 | |
1258 | /* keep private stats: framing overhead and number of NTBs */ | |
1259 | ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload; | |
1260 | ctx->tx_ntbs++; | |
1261 | ||
7a1e890e | 1262 | /* usbnet will count all the framing overhead by default. |
beeecd42 BM |
1263 | * Adjust the stats so that the tx_bytes counter show real |
1264 | * payload data instead. | |
1265 | */ | |
7a1e890e | 1266 | usbnet_set_skb_tx_stats(skb_out, n, |
44f6731d | 1267 | (long)ctx->tx_curr_frame_payload - skb_out->len); |
1e9e39f4 | 1268 | |
900d495a AO |
1269 | return skb_out; |
1270 | ||
1271 | exit_no_skb: | |
046c6594 BM |
1272 | /* Start timer, if there is a remaining non-empty skb */ |
1273 | if (ctx->tx_curr_skb != NULL && n > 0) | |
c84ff1d6 | 1274 | cdc_ncm_tx_timeout_start(ctx); |
900d495a AO |
1275 | return NULL; |
1276 | } | |
c91ce3b6 | 1277 | EXPORT_SYMBOL_GPL(cdc_ncm_fill_tx_frame); |
900d495a AO |
1278 | |
1279 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) | |
1280 | { | |
1281 | /* start timer, if not already started */ | |
c84ff1d6 AO |
1282 | if (!(hrtimer_active(&ctx->tx_timer) || atomic_read(&ctx->stop))) |
1283 | hrtimer_start(&ctx->tx_timer, | |
6c4e548f | 1284 | ktime_set(0, ctx->timer_interval), |
c84ff1d6 | 1285 | HRTIMER_MODE_REL); |
900d495a AO |
1286 | } |
1287 | ||
c84ff1d6 | 1288 | static enum hrtimer_restart cdc_ncm_tx_timer_cb(struct hrtimer *timer) |
900d495a | 1289 | { |
c84ff1d6 AO |
1290 | struct cdc_ncm_ctx *ctx = |
1291 | container_of(timer, struct cdc_ncm_ctx, tx_timer); | |
900d495a | 1292 | |
c84ff1d6 AO |
1293 | if (!atomic_read(&ctx->stop)) |
1294 | tasklet_schedule(&ctx->bh); | |
1295 | return HRTIMER_NORESTART; | |
1296 | } | |
900d495a | 1297 | |
c84ff1d6 AO |
1298 | static void cdc_ncm_txpath_bh(unsigned long param) |
1299 | { | |
bed6f762 BM |
1300 | struct usbnet *dev = (struct usbnet *)param; |
1301 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a | 1302 | |
c84ff1d6 AO |
1303 | spin_lock_bh(&ctx->mtx); |
1304 | if (ctx->tx_timer_pending != 0) { | |
1305 | ctx->tx_timer_pending--; | |
900d495a | 1306 | cdc_ncm_tx_timeout_start(ctx); |
c84ff1d6 | 1307 | spin_unlock_bh(&ctx->mtx); |
bed6f762 | 1308 | } else if (dev->net != NULL) { |
beeecd42 | 1309 | ctx->tx_reason_timeout++; /* count reason for transmitting */ |
c84ff1d6 | 1310 | spin_unlock_bh(&ctx->mtx); |
bed6f762 BM |
1311 | netif_tx_lock_bh(dev->net); |
1312 | usbnet_start_xmit(NULL, dev->net); | |
1313 | netif_tx_unlock_bh(dev->net); | |
7b1e0cba BM |
1314 | } else { |
1315 | spin_unlock_bh(&ctx->mtx); | |
f742aa8a | 1316 | } |
900d495a AO |
1317 | } |
1318 | ||
2f69702c | 1319 | struct sk_buff * |
900d495a AO |
1320 | cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) |
1321 | { | |
1322 | struct sk_buff *skb_out; | |
1323 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
900d495a AO |
1324 | |
1325 | /* | |
1326 | * The Ethernet API we are using does not support transmitting | |
1327 | * multiple Ethernet frames in a single call. This driver will | |
1328 | * accumulate multiple Ethernet frames and send out a larger | |
1329 | * USB frame when the USB buffer is full or when a single jiffies | |
1330 | * timeout happens. | |
1331 | */ | |
1332 | if (ctx == NULL) | |
1333 | goto error; | |
1334 | ||
c84ff1d6 | 1335 | spin_lock_bh(&ctx->mtx); |
bed6f762 | 1336 | skb_out = cdc_ncm_fill_tx_frame(dev, skb, cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)); |
c84ff1d6 | 1337 | spin_unlock_bh(&ctx->mtx); |
900d495a AO |
1338 | return skb_out; |
1339 | ||
1340 | error: | |
1341 | if (skb != NULL) | |
1342 | dev_kfree_skb_any(skb); | |
1343 | ||
1344 | return NULL; | |
1345 | } | |
2f69702c | 1346 | EXPORT_SYMBOL_GPL(cdc_ncm_tx_fixup); |
900d495a | 1347 | |
ff06ab13 | 1348 | /* verify NTB header and return offset of first NDP, or negative error */ |
c91ce3b6 | 1349 | int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in) |
900d495a | 1350 | { |
ae223cd4 | 1351 | struct usbnet *dev = netdev_priv(skb_in->dev); |
d5ddb4a5 | 1352 | struct usb_cdc_ncm_nth16 *nth16; |
ff06ab13 BM |
1353 | int len; |
1354 | int ret = -EINVAL; | |
900d495a | 1355 | |
900d495a AO |
1356 | if (ctx == NULL) |
1357 | goto error; | |
1358 | ||
d5ddb4a5 AO |
1359 | if (skb_in->len < (sizeof(struct usb_cdc_ncm_nth16) + |
1360 | sizeof(struct usb_cdc_ncm_ndp16))) { | |
ae223cd4 | 1361 | netif_dbg(dev, rx_err, dev->net, "frame too short\n"); |
900d495a AO |
1362 | goto error; |
1363 | } | |
1364 | ||
d5ddb4a5 | 1365 | nth16 = (struct usb_cdc_ncm_nth16 *)skb_in->data; |
900d495a | 1366 | |
986e10d6 | 1367 | if (nth16->dwSignature != cpu_to_le32(USB_CDC_NCM_NTH16_SIGN)) { |
5448d75f BM |
1368 | netif_dbg(dev, rx_err, dev->net, |
1369 | "invalid NTH16 signature <%#010x>\n", | |
1370 | le32_to_cpu(nth16->dwSignature)); | |
900d495a AO |
1371 | goto error; |
1372 | } | |
1373 | ||
d5ddb4a5 AO |
1374 | len = le16_to_cpu(nth16->wBlockLength); |
1375 | if (len > ctx->rx_max) { | |
ae223cd4 BM |
1376 | netif_dbg(dev, rx_err, dev->net, |
1377 | "unsupported NTB block length %u/%u\n", len, | |
1378 | ctx->rx_max); | |
900d495a AO |
1379 | goto error; |
1380 | } | |
1381 | ||
d5ddb4a5 | 1382 | if ((ctx->rx_seq + 1) != le16_to_cpu(nth16->wSequence) && |
ae223cd4 BM |
1383 | (ctx->rx_seq || le16_to_cpu(nth16->wSequence)) && |
1384 | !((ctx->rx_seq == 0xffff) && !le16_to_cpu(nth16->wSequence))) { | |
1385 | netif_dbg(dev, rx_err, dev->net, | |
1386 | "sequence number glitch prev=%d curr=%d\n", | |
1387 | ctx->rx_seq, le16_to_cpu(nth16->wSequence)); | |
d5ddb4a5 AO |
1388 | } |
1389 | ctx->rx_seq = le16_to_cpu(nth16->wSequence); | |
1390 | ||
ff06ab13 BM |
1391 | ret = le16_to_cpu(nth16->wNdpIndex); |
1392 | error: | |
1393 | return ret; | |
1394 | } | |
c91ce3b6 | 1395 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_nth16); |
ff06ab13 BM |
1396 | |
1397 | /* verify NDP header and return number of datagrams, or negative error */ | |
c91ce3b6 | 1398 | int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset) |
ff06ab13 | 1399 | { |
ae223cd4 | 1400 | struct usbnet *dev = netdev_priv(skb_in->dev); |
ff06ab13 BM |
1401 | struct usb_cdc_ncm_ndp16 *ndp16; |
1402 | int ret = -EINVAL; | |
1403 | ||
75d67d35 | 1404 | if ((ndpoffset + sizeof(struct usb_cdc_ncm_ndp16)) > skb_in->len) { |
ae223cd4 BM |
1405 | netif_dbg(dev, rx_err, dev->net, "invalid NDP offset <%u>\n", |
1406 | ndpoffset); | |
900d495a AO |
1407 | goto error; |
1408 | } | |
75d67d35 | 1409 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); |
900d495a | 1410 | |
d5ddb4a5 | 1411 | if (le16_to_cpu(ndp16->wLength) < USB_CDC_NCM_NDP16_LENGTH_MIN) { |
ae223cd4 BM |
1412 | netif_dbg(dev, rx_err, dev->net, "invalid DPT16 length <%u>\n", |
1413 | le16_to_cpu(ndp16->wLength)); | |
ff06ab13 | 1414 | goto error; |
900d495a AO |
1415 | } |
1416 | ||
ff06ab13 | 1417 | ret = ((le16_to_cpu(ndp16->wLength) - |
900d495a AO |
1418 | sizeof(struct usb_cdc_ncm_ndp16)) / |
1419 | sizeof(struct usb_cdc_ncm_dpe16)); | |
ff06ab13 | 1420 | ret--; /* we process NDP entries except for the last one */ |
900d495a | 1421 | |
ae223cd4 BM |
1422 | if ((sizeof(struct usb_cdc_ncm_ndp16) + |
1423 | ret * (sizeof(struct usb_cdc_ncm_dpe16))) > skb_in->len) { | |
1424 | netif_dbg(dev, rx_err, dev->net, "Invalid nframes = %d\n", ret); | |
ff06ab13 | 1425 | ret = -EINVAL; |
900d495a AO |
1426 | } |
1427 | ||
ff06ab13 BM |
1428 | error: |
1429 | return ret; | |
1430 | } | |
c91ce3b6 | 1431 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_verify_ndp16); |
ff06ab13 | 1432 | |
2f69702c | 1433 | int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) |
ff06ab13 BM |
1434 | { |
1435 | struct sk_buff *skb; | |
1436 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1437 | int len; | |
1438 | int nframes; | |
1439 | int x; | |
1440 | int offset; | |
1441 | struct usb_cdc_ncm_ndp16 *ndp16; | |
1442 | struct usb_cdc_ncm_dpe16 *dpe16; | |
1443 | int ndpoffset; | |
1444 | int loopcount = 50; /* arbitrary max preventing infinite loop */ | |
beeecd42 | 1445 | u32 payload = 0; |
ff06ab13 BM |
1446 | |
1447 | ndpoffset = cdc_ncm_rx_verify_nth16(ctx, skb_in); | |
1448 | if (ndpoffset < 0) | |
1449 | goto error; | |
1450 | ||
1451 | next_ndp: | |
1452 | nframes = cdc_ncm_rx_verify_ndp16(skb_in, ndpoffset); | |
1453 | if (nframes < 0) | |
1454 | goto error; | |
1455 | ||
1456 | ndp16 = (struct usb_cdc_ncm_ndp16 *)(skb_in->data + ndpoffset); | |
1457 | ||
986e10d6 | 1458 | if (ndp16->dwSignature != cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN)) { |
5448d75f BM |
1459 | netif_dbg(dev, rx_err, dev->net, |
1460 | "invalid DPT16 signature <%#010x>\n", | |
1461 | le32_to_cpu(ndp16->dwSignature)); | |
ff06ab13 BM |
1462 | goto err_ndp; |
1463 | } | |
1464 | dpe16 = ndp16->dpe16; | |
900d495a | 1465 | |
d5ddb4a5 AO |
1466 | for (x = 0; x < nframes; x++, dpe16++) { |
1467 | offset = le16_to_cpu(dpe16->wDatagramIndex); | |
1468 | len = le16_to_cpu(dpe16->wDatagramLength); | |
900d495a AO |
1469 | |
1470 | /* | |
1471 | * CDC NCM ch. 3.7 | |
1472 | * All entries after first NULL entry are to be ignored | |
1473 | */ | |
d5ddb4a5 | 1474 | if ((offset == 0) || (len == 0)) { |
900d495a | 1475 | if (!x) |
75d67d35 | 1476 | goto err_ndp; /* empty NTB */ |
900d495a AO |
1477 | break; |
1478 | } | |
1479 | ||
1480 | /* sanity checking */ | |
d5ddb4a5 AO |
1481 | if (((offset + len) > skb_in->len) || |
1482 | (len > ctx->rx_max) || (len < ETH_HLEN)) { | |
ae223cd4 BM |
1483 | netif_dbg(dev, rx_err, dev->net, |
1484 | "invalid frame detected (ignored) offset[%u]=%u, length=%u, skb=%p\n", | |
1485 | x, offset, len, skb_in); | |
900d495a | 1486 | if (!x) |
75d67d35 | 1487 | goto err_ndp; |
900d495a AO |
1488 | break; |
1489 | ||
1490 | } else { | |
1e2c6117 BM |
1491 | /* create a fresh copy to reduce truesize */ |
1492 | skb = netdev_alloc_skb_ip_align(dev->net, len); | |
9e56790a JJ |
1493 | if (!skb) |
1494 | goto error; | |
1e2c6117 | 1495 | memcpy(skb_put(skb, len), skb_in->data + offset, len); |
900d495a | 1496 | usbnet_skb_return(dev, skb); |
beeecd42 | 1497 | payload += len; /* count payload bytes in this NTB */ |
900d495a AO |
1498 | } |
1499 | } | |
75d67d35 BM |
1500 | err_ndp: |
1501 | /* are there more NDPs to process? */ | |
1502 | ndpoffset = le16_to_cpu(ndp16->wNextNdpIndex); | |
1503 | if (ndpoffset && loopcount--) | |
1504 | goto next_ndp; | |
1505 | ||
beeecd42 BM |
1506 | /* update stats */ |
1507 | ctx->rx_overhead += skb_in->len - payload; | |
1508 | ctx->rx_ntbs++; | |
1509 | ||
900d495a AO |
1510 | return 1; |
1511 | error: | |
1512 | return 0; | |
1513 | } | |
2f69702c | 1514 | EXPORT_SYMBOL_GPL(cdc_ncm_rx_fixup); |
900d495a AO |
1515 | |
1516 | static void | |
bed6f762 | 1517 | cdc_ncm_speed_change(struct usbnet *dev, |
84e77a8b | 1518 | struct usb_cdc_speed_change *data) |
900d495a | 1519 | { |
84e77a8b AO |
1520 | uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); |
1521 | uint32_t tx_speed = le32_to_cpu(data->ULBitRate); | |
900d495a AO |
1522 | |
1523 | /* | |
1524 | * Currently the USB-NET API does not support reporting the actual | |
1525 | * device speed. Do print it instead. | |
1526 | */ | |
f3028c52 | 1527 | if ((tx_speed > 1000000) && (rx_speed > 1000000)) { |
ae223cd4 | 1528 | netif_info(dev, link, dev->net, |
916f7640 BM |
1529 | "%u mbit/s downlink %u mbit/s uplink\n", |
1530 | (unsigned int)(rx_speed / 1000000U), | |
1531 | (unsigned int)(tx_speed / 1000000U)); | |
f3028c52 | 1532 | } else { |
ae223cd4 | 1533 | netif_info(dev, link, dev->net, |
916f7640 BM |
1534 | "%u kbit/s downlink %u kbit/s uplink\n", |
1535 | (unsigned int)(rx_speed / 1000U), | |
1536 | (unsigned int)(tx_speed / 1000U)); | |
900d495a AO |
1537 | } |
1538 | } | |
1539 | ||
1540 | static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) | |
1541 | { | |
1542 | struct cdc_ncm_ctx *ctx; | |
1543 | struct usb_cdc_notification *event; | |
1544 | ||
1545 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1546 | ||
1547 | if (urb->actual_length < sizeof(*event)) | |
1548 | return; | |
1549 | ||
1550 | /* test for split data in 8-byte chunks */ | |
1551 | if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { | |
bed6f762 | 1552 | cdc_ncm_speed_change(dev, |
84e77a8b | 1553 | (struct usb_cdc_speed_change *)urb->transfer_buffer); |
900d495a AO |
1554 | return; |
1555 | } | |
1556 | ||
1557 | event = urb->transfer_buffer; | |
1558 | ||
1559 | switch (event->bNotificationType) { | |
1560 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
1561 | /* | |
1562 | * According to the CDC NCM specification ch.7.1 | |
1563 | * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be | |
1564 | * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. | |
1565 | */ | |
ae223cd4 BM |
1566 | netif_info(dev, link, dev->net, |
1567 | "network connection: %sconnected\n", | |
fa83dbee BM |
1568 | !!event->wValue ? "" : "dis"); |
1569 | usbnet_link_change(dev, !!event->wValue, 0); | |
900d495a AO |
1570 | break; |
1571 | ||
1572 | case USB_CDC_NOTIFY_SPEED_CHANGE: | |
84e77a8b AO |
1573 | if (urb->actual_length < (sizeof(*event) + |
1574 | sizeof(struct usb_cdc_speed_change))) | |
900d495a AO |
1575 | set_bit(EVENT_STS_SPLIT, &dev->flags); |
1576 | else | |
bed6f762 BM |
1577 | cdc_ncm_speed_change(dev, |
1578 | (struct usb_cdc_speed_change *)&event[1]); | |
900d495a AO |
1579 | break; |
1580 | ||
1581 | default: | |
67a36606 BM |
1582 | dev_dbg(&dev->udev->dev, |
1583 | "NCM: unexpected notification 0x%02x!\n", | |
1584 | event->bNotificationType); | |
900d495a AO |
1585 | break; |
1586 | } | |
1587 | } | |
1588 | ||
900d495a AO |
1589 | static const struct driver_info cdc_ncm_info = { |
1590 | .description = "CDC NCM", | |
4d06dd53 BM |
1591 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET |
1592 | | FLAG_LINK_INTR, | |
900d495a AO |
1593 | .bind = cdc_ncm_bind, |
1594 | .unbind = cdc_ncm_unbind, | |
a5e40708 | 1595 | .manage_power = usbnet_manage_power, |
900d495a AO |
1596 | .status = cdc_ncm_status, |
1597 | .rx_fixup = cdc_ncm_rx_fixup, | |
1598 | .tx_fixup = cdc_ncm_tx_fixup, | |
1599 | }; | |
1600 | ||
f94898ea DW |
1601 | /* Same as cdc_ncm_info, but with FLAG_WWAN */ |
1602 | static const struct driver_info wwan_info = { | |
1603 | .description = "Mobile Broadband Network Device", | |
1604 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
4d06dd53 | 1605 | | FLAG_LINK_INTR | FLAG_WWAN, |
f94898ea DW |
1606 | .bind = cdc_ncm_bind, |
1607 | .unbind = cdc_ncm_unbind, | |
a5e40708 | 1608 | .manage_power = usbnet_manage_power, |
f94898ea DW |
1609 | .status = cdc_ncm_status, |
1610 | .rx_fixup = cdc_ncm_rx_fixup, | |
1611 | .tx_fixup = cdc_ncm_tx_fixup, | |
1612 | }; | |
1613 | ||
2f62d5aa WS |
1614 | /* Same as wwan_info, but with FLAG_NOARP */ |
1615 | static const struct driver_info wwan_noarp_info = { | |
1616 | .description = "Mobile Broadband Network Device (NO ARP)", | |
1617 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET | |
4d06dd53 | 1618 | | FLAG_LINK_INTR | FLAG_WWAN | FLAG_NOARP, |
2f62d5aa WS |
1619 | .bind = cdc_ncm_bind, |
1620 | .unbind = cdc_ncm_unbind, | |
2f62d5aa WS |
1621 | .manage_power = usbnet_manage_power, |
1622 | .status = cdc_ncm_status, | |
1623 | .rx_fixup = cdc_ncm_rx_fixup, | |
1624 | .tx_fixup = cdc_ncm_tx_fixup, | |
1625 | }; | |
1626 | ||
f94898ea DW |
1627 | static const struct usb_device_id cdc_devs[] = { |
1628 | /* Ericsson MBM devices like F5521gw */ | |
1629 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1630 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1631 | .idVendor = 0x0bdb, | |
1632 | .bInterfaceClass = USB_CLASS_COMM, | |
1633 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1634 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1635 | .driver_info = (unsigned long) &wwan_info, | |
1636 | }, | |
1637 | ||
79f42232 DP |
1638 | /* Telit LE910 V2 */ |
1639 | { USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x0036, | |
1640 | USB_CLASS_COMM, | |
1641 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1642 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1643 | }, | |
1644 | ||
670c0d62 DP |
1645 | /* DW5812 LTE Verizon Mobile Broadband Card |
1646 | * Unlike DW5550 this device requires FLAG_NOARP | |
1647 | */ | |
1648 | { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bb, | |
1649 | USB_CLASS_COMM, | |
1650 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1651 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1652 | }, | |
1653 | ||
fb83d5f2 DP |
1654 | /* DW5813 LTE AT&T Mobile Broadband Card |
1655 | * Unlike DW5550 this device requires FLAG_NOARP | |
1656 | */ | |
1657 | { USB_DEVICE_AND_INTERFACE_INFO(0x413c, 0x81bc, | |
1658 | USB_CLASS_COMM, | |
1659 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1660 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1661 | }, | |
1662 | ||
f3a1ef9c PM |
1663 | /* Dell branded MBM devices like DW5550 */ |
1664 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1665 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1666 | .idVendor = 0x413c, | |
1667 | .bInterfaceClass = USB_CLASS_COMM, | |
1668 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1669 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1670 | .driver_info = (unsigned long) &wwan_info, | |
1671 | }, | |
1672 | ||
1673 | /* Toshiba branded MBM devices */ | |
1674 | { .match_flags = USB_DEVICE_ID_MATCH_INT_INFO | |
1675 | | USB_DEVICE_ID_MATCH_VENDOR, | |
1676 | .idVendor = 0x0930, | |
1677 | .bInterfaceClass = USB_CLASS_COMM, | |
1678 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, | |
1679 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, | |
1680 | .driver_info = (unsigned long) &wwan_info, | |
1681 | }, | |
1682 | ||
1f84eab4 BM |
1683 | /* tag Huawei devices as wwan */ |
1684 | { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, | |
1685 | USB_CLASS_COMM, | |
1686 | USB_CDC_SUBCLASS_NCM, | |
1687 | USB_CDC_PROTO_NONE), | |
1688 | .driver_info = (unsigned long)&wwan_info, | |
1689 | }, | |
1690 | ||
2f62d5aa WS |
1691 | /* Infineon(now Intel) HSPA Modem platform */ |
1692 | { USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443, | |
1693 | USB_CLASS_COMM, | |
1694 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1695 | .driver_info = (unsigned long)&wwan_noarp_info, | |
1696 | }, | |
1697 | ||
f94898ea DW |
1698 | /* Generic CDC-NCM devices */ |
1699 | { USB_INTERFACE_INFO(USB_CLASS_COMM, | |
1700 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
1701 | .driver_info = (unsigned long)&cdc_ncm_info, | |
1702 | }, | |
1703 | { | |
1704 | }, | |
1705 | }; | |
1706 | MODULE_DEVICE_TABLE(usb, cdc_devs); | |
1707 | ||
900d495a AO |
1708 | static struct usb_driver cdc_ncm_driver = { |
1709 | .name = "cdc_ncm", | |
1710 | .id_table = cdc_devs, | |
085e50e1 BM |
1711 | .probe = usbnet_probe, |
1712 | .disconnect = usbnet_disconnect, | |
900d495a AO |
1713 | .suspend = usbnet_suspend, |
1714 | .resume = usbnet_resume, | |
85e3c65f | 1715 | .reset_resume = usbnet_resume, |
900d495a | 1716 | .supports_autosuspend = 1, |
e1f12eb6 | 1717 | .disable_hub_initiated_lpm = 1, |
900d495a AO |
1718 | }; |
1719 | ||
d632eb1b | 1720 | module_usb_driver(cdc_ncm_driver); |
900d495a AO |
1721 | |
1722 | MODULE_AUTHOR("Hans Petter Selasky"); | |
1723 | MODULE_DESCRIPTION("USB CDC NCM host driver"); | |
1724 | MODULE_LICENSE("Dual BSD/GPL"); |