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900d495a AO |
1 | /* |
2 | * cdc_ncm.c | |
3 | * | |
84e77a8b | 4 | * Copyright (C) ST-Ericsson 2010-2011 |
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) | |
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> | |
42 | #include <linux/init.h> | |
43 | #include <linux/netdevice.h> | |
44 | #include <linux/ctype.h> | |
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> | |
900d495a AO |
50 | #include <linux/timer.h> |
51 | #include <linux/spinlock.h> | |
52 | #include <linux/atomic.h> | |
53 | #include <linux/usb/usbnet.h> | |
54 | #include <linux/usb/cdc.h> | |
55 | ||
36c35416 | 56 | #define DRIVER_VERSION "04-Aug-2011" |
900d495a AO |
57 | |
58 | /* CDC NCM subclass 3.2.1 */ | |
59 | #define USB_CDC_NCM_NDP16_LENGTH_MIN 0x10 | |
60 | ||
61 | /* Maximum NTB length */ | |
6c60408e | 62 | #define CDC_NCM_NTB_MAX_SIZE_TX 16384 /* bytes */ |
900d495a AO |
63 | #define CDC_NCM_NTB_MAX_SIZE_RX 16384 /* bytes */ |
64 | ||
65 | /* Minimum value for MaxDatagramSize, ch. 6.2.9 */ | |
66 | #define CDC_NCM_MIN_DATAGRAM_SIZE 1514 /* bytes */ | |
67 | ||
68 | #define CDC_NCM_MIN_TX_PKT 512 /* bytes */ | |
69 | ||
70 | /* Default value for MaxDatagramSize */ | |
71 | #define CDC_NCM_MAX_DATAGRAM_SIZE 2048 /* bytes */ | |
72 | ||
73 | /* | |
74 | * Maximum amount of datagrams in NCM Datagram Pointer Table, not counting | |
75 | * the last NULL entry. Any additional datagrams in NTB would be discarded. | |
76 | */ | |
77 | #define CDC_NCM_DPT_DATAGRAMS_MAX 32 | |
78 | ||
84e77a8b AO |
79 | /* Maximum amount of IN datagrams in NTB */ |
80 | #define CDC_NCM_DPT_DATAGRAMS_IN_MAX 0 /* unlimited */ | |
81 | ||
900d495a AO |
82 | /* Restart the timer, if amount of datagrams is less than given value */ |
83 | #define CDC_NCM_RESTART_TIMER_DATAGRAM_CNT 3 | |
84 | ||
85 | /* The following macro defines the minimum header space */ | |
86 | #define CDC_NCM_MIN_HDR_SIZE \ | |
87 | (sizeof(struct usb_cdc_ncm_nth16) + sizeof(struct usb_cdc_ncm_ndp16) + \ | |
88 | (CDC_NCM_DPT_DATAGRAMS_MAX + 1) * sizeof(struct usb_cdc_ncm_dpe16)) | |
89 | ||
900d495a AO |
90 | struct cdc_ncm_data { |
91 | struct usb_cdc_ncm_nth16 nth16; | |
92 | struct usb_cdc_ncm_ndp16 ndp16; | |
93 | struct usb_cdc_ncm_dpe16 dpe16[CDC_NCM_DPT_DATAGRAMS_MAX + 1]; | |
94 | }; | |
95 | ||
96 | struct cdc_ncm_ctx { | |
97 | struct cdc_ncm_data rx_ncm; | |
98 | struct cdc_ncm_data tx_ncm; | |
99 | struct usb_cdc_ncm_ntb_parameters ncm_parm; | |
100 | struct timer_list tx_timer; | |
101 | ||
102 | const struct usb_cdc_ncm_desc *func_desc; | |
103 | const struct usb_cdc_header_desc *header_desc; | |
104 | const struct usb_cdc_union_desc *union_desc; | |
105 | const struct usb_cdc_ether_desc *ether_desc; | |
106 | ||
107 | struct net_device *netdev; | |
108 | struct usb_device *udev; | |
109 | struct usb_host_endpoint *in_ep; | |
110 | struct usb_host_endpoint *out_ep; | |
111 | struct usb_host_endpoint *status_ep; | |
112 | struct usb_interface *intf; | |
113 | struct usb_interface *control; | |
114 | struct usb_interface *data; | |
115 | ||
116 | struct sk_buff *tx_curr_skb; | |
117 | struct sk_buff *tx_rem_skb; | |
118 | ||
119 | spinlock_t mtx; | |
120 | ||
121 | u32 tx_timer_pending; | |
122 | u32 tx_curr_offset; | |
123 | u32 tx_curr_last_offset; | |
124 | u32 tx_curr_frame_num; | |
125 | u32 rx_speed; | |
126 | u32 tx_speed; | |
127 | u32 rx_max; | |
128 | u32 tx_max; | |
129 | u32 max_datagram_size; | |
130 | u16 tx_max_datagrams; | |
131 | u16 tx_remainder; | |
132 | u16 tx_modulus; | |
133 | u16 tx_ndp_modulus; | |
134 | u16 tx_seq; | |
135 | u16 connected; | |
900d495a AO |
136 | }; |
137 | ||
138 | static void cdc_ncm_tx_timeout(unsigned long arg); | |
139 | static const struct driver_info cdc_ncm_info; | |
140 | static struct usb_driver cdc_ncm_driver; | |
141 | static struct ethtool_ops cdc_ncm_ethtool_ops; | |
142 | ||
143 | static const struct usb_device_id cdc_devs[] = { | |
144 | { USB_INTERFACE_INFO(USB_CLASS_COMM, | |
145 | USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE), | |
146 | .driver_info = (unsigned long)&cdc_ncm_info, | |
147 | }, | |
148 | { | |
149 | }, | |
150 | }; | |
151 | ||
152 | MODULE_DEVICE_TABLE(usb, cdc_devs); | |
153 | ||
154 | static void | |
155 | cdc_ncm_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) | |
156 | { | |
157 | struct usbnet *dev = netdev_priv(net); | |
158 | ||
159 | strncpy(info->driver, dev->driver_name, sizeof(info->driver)); | |
160 | strncpy(info->version, DRIVER_VERSION, sizeof(info->version)); | |
161 | strncpy(info->fw_version, dev->driver_info->description, | |
162 | sizeof(info->fw_version)); | |
163 | usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); | |
164 | } | |
165 | ||
900d495a AO |
166 | static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx) |
167 | { | |
900d495a | 168 | u32 val; |
900d495a AO |
169 | u8 flags; |
170 | u8 iface_no; | |
171 | int err; | |
84e77a8b | 172 | u16 ntb_fmt_supported; |
900d495a AO |
173 | |
174 | iface_no = ctx->control->cur_altsetting->desc.bInterfaceNumber; | |
175 | ||
36c35416 GS |
176 | err = usb_control_msg(ctx->udev, |
177 | usb_rcvctrlpipe(ctx->udev, 0), | |
178 | USB_CDC_GET_NTB_PARAMETERS, | |
179 | USB_TYPE_CLASS | USB_DIR_IN | |
180 | | USB_RECIP_INTERFACE, | |
181 | 0, iface_no, &ctx->ncm_parm, | |
182 | sizeof(ctx->ncm_parm), 10000); | |
183 | if (err < 0) { | |
900d495a AO |
184 | pr_debug("failed GET_NTB_PARAMETERS\n"); |
185 | return 1; | |
186 | } | |
187 | ||
188 | /* read correct set of parameters according to device mode */ | |
189 | ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize); | |
190 | ctx->tx_max = le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize); | |
191 | ctx->tx_remainder = le16_to_cpu(ctx->ncm_parm.wNdpOutPayloadRemainder); | |
192 | ctx->tx_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutDivisor); | |
193 | ctx->tx_ndp_modulus = le16_to_cpu(ctx->ncm_parm.wNdpOutAlignment); | |
84e77a8b AO |
194 | /* devices prior to NCM Errata shall set this field to zero */ |
195 | ctx->tx_max_datagrams = le16_to_cpu(ctx->ncm_parm.wNtbOutMaxDatagrams); | |
196 | ntb_fmt_supported = le16_to_cpu(ctx->ncm_parm.bmNtbFormatsSupported); | |
900d495a AO |
197 | |
198 | if (ctx->func_desc != NULL) | |
199 | flags = ctx->func_desc->bmNetworkCapabilities; | |
200 | else | |
201 | flags = 0; | |
202 | ||
203 | pr_debug("dwNtbInMaxSize=%u dwNtbOutMaxSize=%u " | |
204 | "wNdpOutPayloadRemainder=%u wNdpOutDivisor=%u " | |
84e77a8b | 205 | "wNdpOutAlignment=%u wNtbOutMaxDatagrams=%u flags=0x%x\n", |
900d495a | 206 | ctx->rx_max, ctx->tx_max, ctx->tx_remainder, ctx->tx_modulus, |
84e77a8b | 207 | ctx->tx_ndp_modulus, ctx->tx_max_datagrams, flags); |
900d495a | 208 | |
84e77a8b AO |
209 | /* max count of tx datagrams */ |
210 | if ((ctx->tx_max_datagrams == 0) || | |
211 | (ctx->tx_max_datagrams > CDC_NCM_DPT_DATAGRAMS_MAX)) | |
212 | ctx->tx_max_datagrams = CDC_NCM_DPT_DATAGRAMS_MAX; | |
900d495a AO |
213 | |
214 | /* verify maximum size of received NTB in bytes */ | |
84e77a8b AO |
215 | if (ctx->rx_max < USB_CDC_NCM_NTB_MIN_IN_SIZE) { |
216 | pr_debug("Using min receive length=%d\n", | |
217 | USB_CDC_NCM_NTB_MIN_IN_SIZE); | |
218 | ctx->rx_max = USB_CDC_NCM_NTB_MIN_IN_SIZE; | |
219 | } | |
220 | ||
221 | if (ctx->rx_max > CDC_NCM_NTB_MAX_SIZE_RX) { | |
900d495a AO |
222 | pr_debug("Using default maximum receive length=%d\n", |
223 | CDC_NCM_NTB_MAX_SIZE_RX); | |
224 | ctx->rx_max = CDC_NCM_NTB_MAX_SIZE_RX; | |
225 | } | |
226 | ||
84e77a8b AO |
227 | /* inform device about NTB input size changes */ |
228 | if (ctx->rx_max != le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize)) { | |
84e77a8b AO |
229 | |
230 | if (flags & USB_CDC_NCM_NCAP_NTB_INPUT_SIZE) { | |
231 | struct usb_cdc_ncm_ndp_input_size ndp_in_sz; | |
36c35416 GS |
232 | err = usb_control_msg(ctx->udev, |
233 | usb_sndctrlpipe(ctx->udev, 0), | |
234 | USB_CDC_SET_NTB_INPUT_SIZE, | |
235 | USB_TYPE_CLASS | USB_DIR_OUT | |
236 | | USB_RECIP_INTERFACE, | |
237 | 0, iface_no, &ndp_in_sz, 8, 1000); | |
84e77a8b AO |
238 | } else { |
239 | __le32 dwNtbInMaxSize = cpu_to_le32(ctx->rx_max); | |
36c35416 GS |
240 | err = usb_control_msg(ctx->udev, |
241 | usb_sndctrlpipe(ctx->udev, 0), | |
242 | USB_CDC_SET_NTB_INPUT_SIZE, | |
243 | USB_TYPE_CLASS | USB_DIR_OUT | |
244 | | USB_RECIP_INTERFACE, | |
245 | 0, iface_no, &dwNtbInMaxSize, 4, 1000); | |
84e77a8b AO |
246 | } |
247 | ||
36c35416 | 248 | if (err < 0) |
84e77a8b AO |
249 | pr_debug("Setting NTB Input Size failed\n"); |
250 | } | |
251 | ||
900d495a AO |
252 | /* verify maximum size of transmitted NTB in bytes */ |
253 | if ((ctx->tx_max < | |
254 | (CDC_NCM_MIN_HDR_SIZE + CDC_NCM_MIN_DATAGRAM_SIZE)) || | |
255 | (ctx->tx_max > CDC_NCM_NTB_MAX_SIZE_TX)) { | |
256 | pr_debug("Using default maximum transmit length=%d\n", | |
257 | CDC_NCM_NTB_MAX_SIZE_TX); | |
258 | ctx->tx_max = CDC_NCM_NTB_MAX_SIZE_TX; | |
259 | } | |
260 | ||
261 | /* | |
262 | * verify that the structure alignment is: | |
263 | * - power of two | |
264 | * - not greater than the maximum transmit length | |
265 | * - not less than four bytes | |
266 | */ | |
267 | val = ctx->tx_ndp_modulus; | |
268 | ||
269 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
270 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
271 | pr_debug("Using default alignment: 4 bytes\n"); | |
272 | ctx->tx_ndp_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; | |
273 | } | |
274 | ||
275 | /* | |
276 | * verify that the payload alignment is: | |
277 | * - power of two | |
278 | * - not greater than the maximum transmit length | |
279 | * - not less than four bytes | |
280 | */ | |
281 | val = ctx->tx_modulus; | |
282 | ||
283 | if ((val < USB_CDC_NCM_NDP_ALIGN_MIN_SIZE) || | |
284 | (val != ((-val) & val)) || (val >= ctx->tx_max)) { | |
285 | pr_debug("Using default transmit modulus: 4 bytes\n"); | |
286 | ctx->tx_modulus = USB_CDC_NCM_NDP_ALIGN_MIN_SIZE; | |
287 | } | |
288 | ||
289 | /* verify the payload remainder */ | |
290 | if (ctx->tx_remainder >= ctx->tx_modulus) { | |
291 | pr_debug("Using default transmit remainder: 0 bytes\n"); | |
292 | ctx->tx_remainder = 0; | |
293 | } | |
294 | ||
295 | /* adjust TX-remainder according to NCM specification. */ | |
296 | ctx->tx_remainder = ((ctx->tx_remainder - ETH_HLEN) & | |
297 | (ctx->tx_modulus - 1)); | |
298 | ||
299 | /* additional configuration */ | |
300 | ||
301 | /* set CRC Mode */ | |
84e77a8b | 302 | if (flags & USB_CDC_NCM_NCAP_CRC_MODE) { |
36c35416 GS |
303 | err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0), |
304 | USB_CDC_SET_CRC_MODE, | |
305 | USB_TYPE_CLASS | USB_DIR_OUT | |
306 | | USB_RECIP_INTERFACE, | |
307 | USB_CDC_NCM_CRC_NOT_APPENDED, | |
308 | iface_no, NULL, 0, 1000); | |
309 | if (err < 0) | |
84e77a8b AO |
310 | pr_debug("Setting CRC mode off failed\n"); |
311 | } | |
900d495a | 312 | |
84e77a8b AO |
313 | /* set NTB format, if both formats are supported */ |
314 | if (ntb_fmt_supported & USB_CDC_NCM_NTH32_SIGN) { | |
36c35416 GS |
315 | err = usb_control_msg(ctx->udev, usb_sndctrlpipe(ctx->udev, 0), |
316 | USB_CDC_SET_NTB_FORMAT, USB_TYPE_CLASS | |
317 | | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
318 | USB_CDC_NCM_NTB16_FORMAT, | |
319 | iface_no, NULL, 0, 1000); | |
320 | if (err < 0) | |
84e77a8b AO |
321 | pr_debug("Setting NTB format to 16-bit failed\n"); |
322 | } | |
900d495a | 323 | |
84e77a8b | 324 | ctx->max_datagram_size = CDC_NCM_MIN_DATAGRAM_SIZE; |
900d495a AO |
325 | |
326 | /* set Max Datagram Size (MTU) */ | |
84e77a8b AO |
327 | if (flags & USB_CDC_NCM_NCAP_MAX_DATAGRAM_SIZE) { |
328 | __le16 max_datagram_size; | |
329 | u16 eth_max_sz = le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
36c35416 GS |
330 | err = usb_control_msg(ctx->udev, usb_rcvctrlpipe(ctx->udev, 0), |
331 | USB_CDC_GET_MAX_DATAGRAM_SIZE, | |
332 | USB_TYPE_CLASS | USB_DIR_IN | |
333 | | USB_RECIP_INTERFACE, | |
334 | 0, iface_no, &max_datagram_size, | |
335 | 2, 1000); | |
336 | if (err < 0) { | |
84e77a8b AO |
337 | pr_debug("GET_MAX_DATAGRAM_SIZE failed, use size=%u\n", |
338 | CDC_NCM_MIN_DATAGRAM_SIZE); | |
339 | } else { | |
340 | ctx->max_datagram_size = le16_to_cpu(max_datagram_size); | |
341 | /* Check Eth descriptor value */ | |
342 | if (eth_max_sz < CDC_NCM_MAX_DATAGRAM_SIZE) { | |
343 | if (ctx->max_datagram_size > eth_max_sz) | |
344 | ctx->max_datagram_size = eth_max_sz; | |
345 | } else { | |
346 | if (ctx->max_datagram_size > | |
347 | CDC_NCM_MAX_DATAGRAM_SIZE) | |
348 | ctx->max_datagram_size = | |
349 | CDC_NCM_MAX_DATAGRAM_SIZE; | |
350 | } | |
900d495a | 351 | |
84e77a8b AO |
352 | if (ctx->max_datagram_size < CDC_NCM_MIN_DATAGRAM_SIZE) |
353 | ctx->max_datagram_size = | |
354 | CDC_NCM_MIN_DATAGRAM_SIZE; | |
355 | ||
356 | /* if value changed, update device */ | |
36c35416 GS |
357 | err = usb_control_msg(ctx->udev, |
358 | usb_sndctrlpipe(ctx->udev, 0), | |
359 | USB_CDC_SET_MAX_DATAGRAM_SIZE, | |
360 | USB_TYPE_CLASS | USB_DIR_OUT | |
361 | | USB_RECIP_INTERFACE, | |
362 | 0, | |
363 | iface_no, &max_datagram_size, | |
364 | 2, 1000); | |
365 | if (err < 0) | |
84e77a8b AO |
366 | pr_debug("SET_MAX_DATAGRAM_SIZE failed\n"); |
367 | } | |
900d495a | 368 | |
900d495a AO |
369 | } |
370 | ||
371 | if (ctx->netdev->mtu != (ctx->max_datagram_size - ETH_HLEN)) | |
372 | ctx->netdev->mtu = ctx->max_datagram_size - ETH_HLEN; | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | static void | |
378 | cdc_ncm_find_endpoints(struct cdc_ncm_ctx *ctx, struct usb_interface *intf) | |
379 | { | |
380 | struct usb_host_endpoint *e; | |
381 | u8 ep; | |
382 | ||
383 | for (ep = 0; ep < intf->cur_altsetting->desc.bNumEndpoints; ep++) { | |
384 | ||
385 | e = intf->cur_altsetting->endpoint + ep; | |
386 | switch (e->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
387 | case USB_ENDPOINT_XFER_INT: | |
388 | if (usb_endpoint_dir_in(&e->desc)) { | |
389 | if (ctx->status_ep == NULL) | |
390 | ctx->status_ep = e; | |
391 | } | |
392 | break; | |
393 | ||
394 | case USB_ENDPOINT_XFER_BULK: | |
395 | if (usb_endpoint_dir_in(&e->desc)) { | |
396 | if (ctx->in_ep == NULL) | |
397 | ctx->in_ep = e; | |
398 | } else { | |
399 | if (ctx->out_ep == NULL) | |
400 | ctx->out_ep = e; | |
401 | } | |
402 | break; | |
403 | ||
404 | default: | |
405 | break; | |
406 | } | |
407 | } | |
408 | } | |
409 | ||
410 | static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) | |
411 | { | |
412 | if (ctx == NULL) | |
413 | return; | |
414 | ||
415 | del_timer_sync(&ctx->tx_timer); | |
416 | ||
900d495a AO |
417 | if (ctx->tx_rem_skb != NULL) { |
418 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
419 | ctx->tx_rem_skb = NULL; | |
420 | } | |
421 | ||
422 | if (ctx->tx_curr_skb != NULL) { | |
423 | dev_kfree_skb_any(ctx->tx_curr_skb); | |
424 | ctx->tx_curr_skb = NULL; | |
425 | } | |
426 | ||
427 | kfree(ctx); | |
428 | } | |
429 | ||
430 | static int cdc_ncm_bind(struct usbnet *dev, struct usb_interface *intf) | |
431 | { | |
432 | struct cdc_ncm_ctx *ctx; | |
433 | struct usb_driver *driver; | |
434 | u8 *buf; | |
435 | int len; | |
436 | int temp; | |
437 | u8 iface_no; | |
438 | ||
439 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); | |
440 | if (ctx == NULL) | |
19694ac8 | 441 | return -ENODEV; |
900d495a AO |
442 | |
443 | memset(ctx, 0, sizeof(*ctx)); | |
444 | ||
445 | init_timer(&ctx->tx_timer); | |
446 | spin_lock_init(&ctx->mtx); | |
447 | ctx->netdev = dev->net; | |
448 | ||
449 | /* store ctx pointer in device data field */ | |
450 | dev->data[0] = (unsigned long)ctx; | |
451 | ||
452 | /* get some pointers */ | |
453 | driver = driver_of(intf); | |
454 | buf = intf->cur_altsetting->extra; | |
455 | len = intf->cur_altsetting->extralen; | |
456 | ||
457 | ctx->udev = dev->udev; | |
458 | ctx->intf = intf; | |
459 | ||
460 | /* parse through descriptors associated with control interface */ | |
461 | while ((len > 0) && (buf[0] > 2) && (buf[0] <= len)) { | |
462 | ||
463 | if (buf[1] != USB_DT_CS_INTERFACE) | |
464 | goto advance; | |
465 | ||
466 | switch (buf[2]) { | |
467 | case USB_CDC_UNION_TYPE: | |
468 | if (buf[0] < sizeof(*(ctx->union_desc))) | |
469 | break; | |
470 | ||
471 | ctx->union_desc = | |
472 | (const struct usb_cdc_union_desc *)buf; | |
473 | ||
474 | ctx->control = usb_ifnum_to_if(dev->udev, | |
475 | ctx->union_desc->bMasterInterface0); | |
476 | ctx->data = usb_ifnum_to_if(dev->udev, | |
477 | ctx->union_desc->bSlaveInterface0); | |
478 | break; | |
479 | ||
480 | case USB_CDC_ETHERNET_TYPE: | |
481 | if (buf[0] < sizeof(*(ctx->ether_desc))) | |
482 | break; | |
483 | ||
484 | ctx->ether_desc = | |
485 | (const struct usb_cdc_ether_desc *)buf; | |
900d495a AO |
486 | dev->hard_mtu = |
487 | le16_to_cpu(ctx->ether_desc->wMaxSegmentSize); | |
488 | ||
84e77a8b AO |
489 | if (dev->hard_mtu < CDC_NCM_MIN_DATAGRAM_SIZE) |
490 | dev->hard_mtu = CDC_NCM_MIN_DATAGRAM_SIZE; | |
491 | else if (dev->hard_mtu > CDC_NCM_MAX_DATAGRAM_SIZE) | |
492 | dev->hard_mtu = CDC_NCM_MAX_DATAGRAM_SIZE; | |
900d495a AO |
493 | break; |
494 | ||
495 | case USB_CDC_NCM_TYPE: | |
496 | if (buf[0] < sizeof(*(ctx->func_desc))) | |
497 | break; | |
498 | ||
499 | ctx->func_desc = (const struct usb_cdc_ncm_desc *)buf; | |
500 | break; | |
501 | ||
502 | default: | |
503 | break; | |
504 | } | |
505 | advance: | |
506 | /* advance to next descriptor */ | |
507 | temp = buf[0]; | |
508 | buf += temp; | |
509 | len -= temp; | |
510 | } | |
511 | ||
512 | /* check if we got everything */ | |
513 | if ((ctx->control == NULL) || (ctx->data == NULL) || | |
19694ac8 | 514 | (ctx->ether_desc == NULL) || (ctx->control != intf)) |
900d495a AO |
515 | goto error; |
516 | ||
517 | /* claim interfaces, if any */ | |
19694ac8 AO |
518 | temp = usb_driver_claim_interface(driver, ctx->data, dev); |
519 | if (temp) | |
520 | goto error; | |
900d495a AO |
521 | |
522 | iface_no = ctx->data->cur_altsetting->desc.bInterfaceNumber; | |
523 | ||
524 | /* reset data interface */ | |
525 | temp = usb_set_interface(dev->udev, iface_no, 0); | |
526 | if (temp) | |
19694ac8 | 527 | goto error2; |
900d495a AO |
528 | |
529 | /* initialize data interface */ | |
530 | if (cdc_ncm_setup(ctx)) | |
19694ac8 | 531 | goto error2; |
900d495a AO |
532 | |
533 | /* configure data interface */ | |
534 | temp = usb_set_interface(dev->udev, iface_no, 1); | |
535 | if (temp) | |
19694ac8 | 536 | goto error2; |
900d495a AO |
537 | |
538 | cdc_ncm_find_endpoints(ctx, ctx->data); | |
539 | cdc_ncm_find_endpoints(ctx, ctx->control); | |
540 | ||
541 | if ((ctx->in_ep == NULL) || (ctx->out_ep == NULL) || | |
542 | (ctx->status_ep == NULL)) | |
19694ac8 | 543 | goto error2; |
900d495a AO |
544 | |
545 | dev->net->ethtool_ops = &cdc_ncm_ethtool_ops; | |
546 | ||
547 | usb_set_intfdata(ctx->data, dev); | |
548 | usb_set_intfdata(ctx->control, dev); | |
549 | usb_set_intfdata(ctx->intf, dev); | |
550 | ||
551 | temp = usbnet_get_ethernet_addr(dev, ctx->ether_desc->iMACAddress); | |
552 | if (temp) | |
19694ac8 | 553 | goto error2; |
900d495a AO |
554 | |
555 | dev_info(&dev->udev->dev, "MAC-Address: " | |
556 | "0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n", | |
557 | dev->net->dev_addr[0], dev->net->dev_addr[1], | |
558 | dev->net->dev_addr[2], dev->net->dev_addr[3], | |
559 | dev->net->dev_addr[4], dev->net->dev_addr[5]); | |
560 | ||
561 | dev->in = usb_rcvbulkpipe(dev->udev, | |
562 | ctx->in_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
563 | dev->out = usb_sndbulkpipe(dev->udev, | |
564 | ctx->out_ep->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); | |
565 | dev->status = ctx->status_ep; | |
566 | dev->rx_urb_size = ctx->rx_max; | |
567 | ||
568 | /* | |
569 | * We should get an event when network connection is "connected" or | |
570 | * "disconnected". Set network connection in "disconnected" state | |
571 | * (carrier is OFF) during attach, so the IP network stack does not | |
572 | * start IPv6 negotiation and more. | |
573 | */ | |
574 | netif_carrier_off(dev->net); | |
575 | ctx->tx_speed = ctx->rx_speed = 0; | |
576 | return 0; | |
577 | ||
19694ac8 AO |
578 | error2: |
579 | usb_set_intfdata(ctx->control, NULL); | |
580 | usb_set_intfdata(ctx->data, NULL); | |
581 | usb_driver_release_interface(driver, ctx->data); | |
900d495a AO |
582 | error: |
583 | cdc_ncm_free((struct cdc_ncm_ctx *)dev->data[0]); | |
584 | dev->data[0] = 0; | |
19694ac8 | 585 | dev_info(&dev->udev->dev, "bind() failure\n"); |
900d495a AO |
586 | return -ENODEV; |
587 | } | |
588 | ||
589 | static void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf) | |
590 | { | |
591 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
19694ac8 | 592 | struct usb_driver *driver = driver_of(intf); |
900d495a AO |
593 | |
594 | if (ctx == NULL) | |
595 | return; /* no setup */ | |
596 | ||
19694ac8 AO |
597 | /* disconnect master --> disconnect slave */ |
598 | if (intf == ctx->control && ctx->data) { | |
599 | usb_set_intfdata(ctx->data, NULL); | |
900d495a | 600 | usb_driver_release_interface(driver, ctx->data); |
19694ac8 | 601 | ctx->data = NULL; |
900d495a | 602 | |
19694ac8 AO |
603 | } else if (intf == ctx->data && ctx->control) { |
604 | usb_set_intfdata(ctx->control, NULL); | |
900d495a | 605 | usb_driver_release_interface(driver, ctx->control); |
19694ac8 | 606 | ctx->control = NULL; |
900d495a AO |
607 | } |
608 | ||
19694ac8 | 609 | usb_set_intfdata(ctx->intf, NULL); |
900d495a AO |
610 | cdc_ncm_free(ctx); |
611 | } | |
612 | ||
613 | static void cdc_ncm_zero_fill(u8 *ptr, u32 first, u32 end, u32 max) | |
614 | { | |
615 | if (first >= max) | |
616 | return; | |
617 | if (first >= end) | |
618 | return; | |
619 | if (end > max) | |
620 | end = max; | |
621 | memset(ptr + first, 0, end - first); | |
622 | } | |
623 | ||
624 | static struct sk_buff * | |
625 | cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb) | |
626 | { | |
627 | struct sk_buff *skb_out; | |
628 | u32 rem; | |
629 | u32 offset; | |
630 | u32 last_offset; | |
36c35416 | 631 | u16 n = 0, index; |
84e77a8b | 632 | u8 ready2send = 0; |
900d495a AO |
633 | |
634 | /* if there is a remaining skb, it gets priority */ | |
635 | if (skb != NULL) | |
636 | swap(skb, ctx->tx_rem_skb); | |
637 | else | |
84e77a8b | 638 | ready2send = 1; |
900d495a AO |
639 | |
640 | /* | |
641 | * +----------------+ | |
642 | * | skb_out | | |
643 | * +----------------+ | |
644 | * ^ offset | |
645 | * ^ last_offset | |
646 | */ | |
647 | ||
648 | /* check if we are resuming an OUT skb */ | |
649 | if (ctx->tx_curr_skb != NULL) { | |
650 | /* pop variables */ | |
651 | skb_out = ctx->tx_curr_skb; | |
652 | offset = ctx->tx_curr_offset; | |
653 | last_offset = ctx->tx_curr_last_offset; | |
654 | n = ctx->tx_curr_frame_num; | |
655 | ||
656 | } else { | |
657 | /* reset variables */ | |
6c60408e | 658 | skb_out = alloc_skb((ctx->tx_max + 1), GFP_ATOMIC); |
900d495a AO |
659 | if (skb_out == NULL) { |
660 | if (skb != NULL) { | |
661 | dev_kfree_skb_any(skb); | |
662 | ctx->netdev->stats.tx_dropped++; | |
663 | } | |
664 | goto exit_no_skb; | |
665 | } | |
666 | ||
667 | /* make room for NTH and NDP */ | |
668 | offset = ALIGN(sizeof(struct usb_cdc_ncm_nth16), | |
669 | ctx->tx_ndp_modulus) + | |
670 | sizeof(struct usb_cdc_ncm_ndp16) + | |
671 | (ctx->tx_max_datagrams + 1) * | |
672 | sizeof(struct usb_cdc_ncm_dpe16); | |
673 | ||
674 | /* store last valid offset before alignment */ | |
675 | last_offset = offset; | |
676 | /* align first Datagram offset correctly */ | |
677 | offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder; | |
678 | /* zero buffer till the first IP datagram */ | |
679 | cdc_ncm_zero_fill(skb_out->data, 0, offset, offset); | |
680 | n = 0; | |
681 | ctx->tx_curr_frame_num = 0; | |
682 | } | |
683 | ||
684 | for (; n < ctx->tx_max_datagrams; n++) { | |
685 | /* check if end of transmit buffer is reached */ | |
84e77a8b AO |
686 | if (offset >= ctx->tx_max) { |
687 | ready2send = 1; | |
900d495a | 688 | break; |
84e77a8b | 689 | } |
900d495a AO |
690 | /* compute maximum buffer size */ |
691 | rem = ctx->tx_max - offset; | |
692 | ||
693 | if (skb == NULL) { | |
694 | skb = ctx->tx_rem_skb; | |
695 | ctx->tx_rem_skb = NULL; | |
696 | ||
697 | /* check for end of skb */ | |
698 | if (skb == NULL) | |
699 | break; | |
700 | } | |
701 | ||
702 | if (skb->len > rem) { | |
703 | if (n == 0) { | |
704 | /* won't fit, MTU problem? */ | |
705 | dev_kfree_skb_any(skb); | |
706 | skb = NULL; | |
707 | ctx->netdev->stats.tx_dropped++; | |
708 | } else { | |
709 | /* no room for skb - store for later */ | |
710 | if (ctx->tx_rem_skb != NULL) { | |
711 | dev_kfree_skb_any(ctx->tx_rem_skb); | |
712 | ctx->netdev->stats.tx_dropped++; | |
713 | } | |
714 | ctx->tx_rem_skb = skb; | |
715 | skb = NULL; | |
84e77a8b | 716 | ready2send = 1; |
900d495a AO |
717 | } |
718 | break; | |
719 | } | |
720 | ||
721 | memcpy(((u8 *)skb_out->data) + offset, skb->data, skb->len); | |
722 | ||
723 | ctx->tx_ncm.dpe16[n].wDatagramLength = cpu_to_le16(skb->len); | |
724 | ctx->tx_ncm.dpe16[n].wDatagramIndex = cpu_to_le16(offset); | |
725 | ||
726 | /* update offset */ | |
727 | offset += skb->len; | |
728 | ||
729 | /* store last valid offset before alignment */ | |
730 | last_offset = offset; | |
731 | ||
732 | /* align offset correctly */ | |
733 | offset = ALIGN(offset, ctx->tx_modulus) + ctx->tx_remainder; | |
734 | ||
735 | /* zero padding */ | |
736 | cdc_ncm_zero_fill(skb_out->data, last_offset, offset, | |
737 | ctx->tx_max); | |
738 | dev_kfree_skb_any(skb); | |
739 | skb = NULL; | |
740 | } | |
741 | ||
742 | /* free up any dangling skb */ | |
743 | if (skb != NULL) { | |
744 | dev_kfree_skb_any(skb); | |
745 | skb = NULL; | |
746 | ctx->netdev->stats.tx_dropped++; | |
747 | } | |
748 | ||
749 | ctx->tx_curr_frame_num = n; | |
750 | ||
751 | if (n == 0) { | |
752 | /* wait for more frames */ | |
753 | /* push variables */ | |
754 | ctx->tx_curr_skb = skb_out; | |
755 | ctx->tx_curr_offset = offset; | |
756 | ctx->tx_curr_last_offset = last_offset; | |
757 | goto exit_no_skb; | |
758 | ||
84e77a8b | 759 | } else if ((n < ctx->tx_max_datagrams) && (ready2send == 0)) { |
900d495a AO |
760 | /* wait for more frames */ |
761 | /* push variables */ | |
762 | ctx->tx_curr_skb = skb_out; | |
763 | ctx->tx_curr_offset = offset; | |
764 | ctx->tx_curr_last_offset = last_offset; | |
765 | /* set the pending count */ | |
766 | if (n < CDC_NCM_RESTART_TIMER_DATAGRAM_CNT) | |
767 | ctx->tx_timer_pending = 2; | |
768 | goto exit_no_skb; | |
769 | ||
770 | } else { | |
771 | /* frame goes out */ | |
772 | /* variables will be reset at next call */ | |
773 | } | |
774 | ||
775 | /* check for overflow */ | |
776 | if (last_offset > ctx->tx_max) | |
777 | last_offset = ctx->tx_max; | |
778 | ||
779 | /* revert offset */ | |
780 | offset = last_offset; | |
781 | ||
782 | /* | |
783 | * If collected data size is less or equal CDC_NCM_MIN_TX_PKT bytes, | |
784 | * we send buffers as it is. If we get more data, it would be more | |
785 | * efficient for USB HS mobile device with DMA engine to receive a full | |
786 | * size NTB, than canceling DMA transfer and receiving a short packet. | |
787 | */ | |
788 | if (offset > CDC_NCM_MIN_TX_PKT) | |
789 | offset = ctx->tx_max; | |
790 | ||
791 | /* final zero padding */ | |
792 | cdc_ncm_zero_fill(skb_out->data, last_offset, offset, ctx->tx_max); | |
793 | ||
794 | /* store last offset */ | |
795 | last_offset = offset; | |
796 | ||
6c60408e AO |
797 | if (((last_offset < ctx->tx_max) && ((last_offset % |
798 | le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) || | |
799 | (((last_offset == ctx->tx_max) && ((ctx->tx_max % | |
800 | le16_to_cpu(ctx->out_ep->desc.wMaxPacketSize)) == 0)) && | |
801 | (ctx->tx_max < le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize)))) { | |
900d495a AO |
802 | /* force short packet */ |
803 | *(((u8 *)skb_out->data) + last_offset) = 0; | |
804 | last_offset++; | |
805 | } | |
806 | ||
807 | /* zero the rest of the DPEs plus the last NULL entry */ | |
808 | for (; n <= CDC_NCM_DPT_DATAGRAMS_MAX; n++) { | |
809 | ctx->tx_ncm.dpe16[n].wDatagramLength = 0; | |
810 | ctx->tx_ncm.dpe16[n].wDatagramIndex = 0; | |
811 | } | |
812 | ||
813 | /* fill out 16-bit NTB header */ | |
814 | ctx->tx_ncm.nth16.dwSignature = cpu_to_le32(USB_CDC_NCM_NTH16_SIGN); | |
815 | ctx->tx_ncm.nth16.wHeaderLength = | |
816 | cpu_to_le16(sizeof(ctx->tx_ncm.nth16)); | |
817 | ctx->tx_ncm.nth16.wSequence = cpu_to_le16(ctx->tx_seq); | |
818 | ctx->tx_ncm.nth16.wBlockLength = cpu_to_le16(last_offset); | |
36c35416 GS |
819 | index = ALIGN(sizeof(struct usb_cdc_ncm_nth16), ctx->tx_ndp_modulus); |
820 | ctx->tx_ncm.nth16.wNdpIndex = cpu_to_le16(index); | |
900d495a AO |
821 | |
822 | memcpy(skb_out->data, &(ctx->tx_ncm.nth16), sizeof(ctx->tx_ncm.nth16)); | |
823 | ctx->tx_seq++; | |
824 | ||
825 | /* fill out 16-bit NDP table */ | |
826 | ctx->tx_ncm.ndp16.dwSignature = | |
827 | cpu_to_le32(USB_CDC_NCM_NDP16_NOCRC_SIGN); | |
828 | rem = sizeof(ctx->tx_ncm.ndp16) + ((ctx->tx_curr_frame_num + 1) * | |
829 | sizeof(struct usb_cdc_ncm_dpe16)); | |
830 | ctx->tx_ncm.ndp16.wLength = cpu_to_le16(rem); | |
84e77a8b | 831 | ctx->tx_ncm.ndp16.wNextNdpIndex = 0; /* reserved */ |
900d495a | 832 | |
36c35416 | 833 | memcpy(((u8 *)skb_out->data) + index, |
900d495a AO |
834 | &(ctx->tx_ncm.ndp16), |
835 | sizeof(ctx->tx_ncm.ndp16)); | |
836 | ||
36c35416 | 837 | memcpy(((u8 *)skb_out->data) + index + sizeof(ctx->tx_ncm.ndp16), |
900d495a AO |
838 | &(ctx->tx_ncm.dpe16), |
839 | (ctx->tx_curr_frame_num + 1) * | |
840 | sizeof(struct usb_cdc_ncm_dpe16)); | |
841 | ||
842 | /* set frame length */ | |
843 | skb_put(skb_out, last_offset); | |
844 | ||
845 | /* return skb */ | |
846 | ctx->tx_curr_skb = NULL; | |
847 | return skb_out; | |
848 | ||
849 | exit_no_skb: | |
850 | return NULL; | |
851 | } | |
852 | ||
853 | static void cdc_ncm_tx_timeout_start(struct cdc_ncm_ctx *ctx) | |
854 | { | |
855 | /* start timer, if not already started */ | |
856 | if (timer_pending(&ctx->tx_timer) == 0) { | |
857 | ctx->tx_timer.function = &cdc_ncm_tx_timeout; | |
858 | ctx->tx_timer.data = (unsigned long)ctx; | |
859 | ctx->tx_timer.expires = jiffies + ((HZ + 999) / 1000); | |
860 | add_timer(&ctx->tx_timer); | |
861 | } | |
862 | } | |
863 | ||
864 | static void cdc_ncm_tx_timeout(unsigned long arg) | |
865 | { | |
866 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)arg; | |
867 | u8 restart; | |
868 | ||
869 | spin_lock(&ctx->mtx); | |
870 | if (ctx->tx_timer_pending != 0) { | |
871 | ctx->tx_timer_pending--; | |
872 | restart = 1; | |
f742aa8a | 873 | } else { |
900d495a | 874 | restart = 0; |
f742aa8a | 875 | } |
900d495a AO |
876 | |
877 | spin_unlock(&ctx->mtx); | |
878 | ||
f742aa8a AO |
879 | if (restart) { |
880 | spin_lock(&ctx->mtx); | |
900d495a | 881 | cdc_ncm_tx_timeout_start(ctx); |
f742aa8a AO |
882 | spin_unlock(&ctx->mtx); |
883 | } else if (ctx->netdev != NULL) { | |
900d495a | 884 | usbnet_start_xmit(NULL, ctx->netdev); |
f742aa8a | 885 | } |
900d495a AO |
886 | } |
887 | ||
888 | static struct sk_buff * | |
889 | cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags) | |
890 | { | |
891 | struct sk_buff *skb_out; | |
892 | struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
893 | u8 need_timer = 0; | |
894 | ||
895 | /* | |
896 | * The Ethernet API we are using does not support transmitting | |
897 | * multiple Ethernet frames in a single call. This driver will | |
898 | * accumulate multiple Ethernet frames and send out a larger | |
899 | * USB frame when the USB buffer is full or when a single jiffies | |
900 | * timeout happens. | |
901 | */ | |
902 | if (ctx == NULL) | |
903 | goto error; | |
904 | ||
905 | spin_lock(&ctx->mtx); | |
906 | skb_out = cdc_ncm_fill_tx_frame(ctx, skb); | |
907 | if (ctx->tx_curr_skb != NULL) | |
908 | need_timer = 1; | |
900d495a AO |
909 | |
910 | /* Start timer, if there is a remaining skb */ | |
911 | if (need_timer) | |
912 | cdc_ncm_tx_timeout_start(ctx); | |
913 | ||
914 | if (skb_out) | |
915 | dev->net->stats.tx_packets += ctx->tx_curr_frame_num; | |
f742aa8a AO |
916 | |
917 | spin_unlock(&ctx->mtx); | |
900d495a AO |
918 | return skb_out; |
919 | ||
920 | error: | |
921 | if (skb != NULL) | |
922 | dev_kfree_skb_any(skb); | |
923 | ||
924 | return NULL; | |
925 | } | |
926 | ||
927 | static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in) | |
928 | { | |
929 | struct sk_buff *skb; | |
930 | struct cdc_ncm_ctx *ctx; | |
931 | int sumlen; | |
932 | int actlen; | |
933 | int temp; | |
934 | int nframes; | |
935 | int x; | |
936 | int offset; | |
937 | ||
938 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
939 | if (ctx == NULL) | |
940 | goto error; | |
941 | ||
942 | actlen = skb_in->len; | |
943 | sumlen = CDC_NCM_NTB_MAX_SIZE_RX; | |
944 | ||
945 | if (actlen < (sizeof(ctx->rx_ncm.nth16) + sizeof(ctx->rx_ncm.ndp16))) { | |
946 | pr_debug("frame too short\n"); | |
947 | goto error; | |
948 | } | |
949 | ||
950 | memcpy(&(ctx->rx_ncm.nth16), ((u8 *)skb_in->data), | |
951 | sizeof(ctx->rx_ncm.nth16)); | |
952 | ||
953 | if (le32_to_cpu(ctx->rx_ncm.nth16.dwSignature) != | |
954 | USB_CDC_NCM_NTH16_SIGN) { | |
955 | pr_debug("invalid NTH16 signature <%u>\n", | |
956 | le32_to_cpu(ctx->rx_ncm.nth16.dwSignature)); | |
957 | goto error; | |
958 | } | |
959 | ||
960 | temp = le16_to_cpu(ctx->rx_ncm.nth16.wBlockLength); | |
961 | if (temp > sumlen) { | |
962 | pr_debug("unsupported NTB block length %u/%u\n", temp, sumlen); | |
963 | goto error; | |
964 | } | |
965 | ||
84e77a8b | 966 | temp = le16_to_cpu(ctx->rx_ncm.nth16.wNdpIndex); |
900d495a AO |
967 | if ((temp + sizeof(ctx->rx_ncm.ndp16)) > actlen) { |
968 | pr_debug("invalid DPT16 index\n"); | |
969 | goto error; | |
970 | } | |
971 | ||
972 | memcpy(&(ctx->rx_ncm.ndp16), ((u8 *)skb_in->data) + temp, | |
973 | sizeof(ctx->rx_ncm.ndp16)); | |
974 | ||
975 | if (le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature) != | |
976 | USB_CDC_NCM_NDP16_NOCRC_SIGN) { | |
977 | pr_debug("invalid DPT16 signature <%u>\n", | |
978 | le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature)); | |
979 | goto error; | |
980 | } | |
981 | ||
982 | if (le16_to_cpu(ctx->rx_ncm.ndp16.wLength) < | |
983 | USB_CDC_NCM_NDP16_LENGTH_MIN) { | |
984 | pr_debug("invalid DPT16 length <%u>\n", | |
985 | le32_to_cpu(ctx->rx_ncm.ndp16.dwSignature)); | |
986 | goto error; | |
987 | } | |
988 | ||
989 | nframes = ((le16_to_cpu(ctx->rx_ncm.ndp16.wLength) - | |
990 | sizeof(struct usb_cdc_ncm_ndp16)) / | |
991 | sizeof(struct usb_cdc_ncm_dpe16)); | |
992 | nframes--; /* we process NDP entries except for the last one */ | |
993 | ||
994 | pr_debug("nframes = %u\n", nframes); | |
995 | ||
996 | temp += sizeof(ctx->rx_ncm.ndp16); | |
997 | ||
998 | if ((temp + nframes * (sizeof(struct usb_cdc_ncm_dpe16))) > actlen) { | |
999 | pr_debug("Invalid nframes = %d\n", nframes); | |
1000 | goto error; | |
1001 | } | |
1002 | ||
1003 | if (nframes > CDC_NCM_DPT_DATAGRAMS_MAX) { | |
1004 | pr_debug("Truncating number of frames from %u to %u\n", | |
1005 | nframes, CDC_NCM_DPT_DATAGRAMS_MAX); | |
1006 | nframes = CDC_NCM_DPT_DATAGRAMS_MAX; | |
1007 | } | |
1008 | ||
1009 | memcpy(&(ctx->rx_ncm.dpe16), ((u8 *)skb_in->data) + temp, | |
1010 | nframes * (sizeof(struct usb_cdc_ncm_dpe16))); | |
1011 | ||
1012 | for (x = 0; x < nframes; x++) { | |
1013 | offset = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramIndex); | |
1014 | temp = le16_to_cpu(ctx->rx_ncm.dpe16[x].wDatagramLength); | |
1015 | ||
1016 | /* | |
1017 | * CDC NCM ch. 3.7 | |
1018 | * All entries after first NULL entry are to be ignored | |
1019 | */ | |
1020 | if ((offset == 0) || (temp == 0)) { | |
1021 | if (!x) | |
1022 | goto error; /* empty NTB */ | |
1023 | break; | |
1024 | } | |
1025 | ||
1026 | /* sanity checking */ | |
1027 | if (((offset + temp) > actlen) || | |
1028 | (temp > CDC_NCM_MAX_DATAGRAM_SIZE) || (temp < ETH_HLEN)) { | |
1029 | pr_debug("invalid frame detected (ignored)" | |
f742aa8a AO |
1030 | "offset[%u]=%u, length=%u, skb=%p\n", |
1031 | x, offset, temp, skb_in); | |
900d495a AO |
1032 | if (!x) |
1033 | goto error; | |
1034 | break; | |
1035 | ||
1036 | } else { | |
1037 | skb = skb_clone(skb_in, GFP_ATOMIC); | |
9e56790a JJ |
1038 | if (!skb) |
1039 | goto error; | |
900d495a AO |
1040 | skb->len = temp; |
1041 | skb->data = ((u8 *)skb_in->data) + offset; | |
1042 | skb_set_tail_pointer(skb, temp); | |
1043 | usbnet_skb_return(dev, skb); | |
1044 | } | |
1045 | } | |
1046 | return 1; | |
1047 | error: | |
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static void | |
1052 | cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx, | |
84e77a8b | 1053 | struct usb_cdc_speed_change *data) |
900d495a | 1054 | { |
84e77a8b AO |
1055 | uint32_t rx_speed = le32_to_cpu(data->DLBitRRate); |
1056 | uint32_t tx_speed = le32_to_cpu(data->ULBitRate); | |
900d495a AO |
1057 | |
1058 | /* | |
1059 | * Currently the USB-NET API does not support reporting the actual | |
1060 | * device speed. Do print it instead. | |
1061 | */ | |
1062 | if ((tx_speed != ctx->tx_speed) || (rx_speed != ctx->rx_speed)) { | |
1063 | ctx->tx_speed = tx_speed; | |
1064 | ctx->rx_speed = rx_speed; | |
1065 | ||
1066 | if ((tx_speed > 1000000) && (rx_speed > 1000000)) { | |
1067 | printk(KERN_INFO KBUILD_MODNAME | |
1068 | ": %s: %u mbit/s downlink " | |
1069 | "%u mbit/s uplink\n", | |
1070 | ctx->netdev->name, | |
1071 | (unsigned int)(rx_speed / 1000000U), | |
1072 | (unsigned int)(tx_speed / 1000000U)); | |
1073 | } else { | |
1074 | printk(KERN_INFO KBUILD_MODNAME | |
1075 | ": %s: %u kbit/s downlink " | |
1076 | "%u kbit/s uplink\n", | |
1077 | ctx->netdev->name, | |
1078 | (unsigned int)(rx_speed / 1000U), | |
1079 | (unsigned int)(tx_speed / 1000U)); | |
1080 | } | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | static void cdc_ncm_status(struct usbnet *dev, struct urb *urb) | |
1085 | { | |
1086 | struct cdc_ncm_ctx *ctx; | |
1087 | struct usb_cdc_notification *event; | |
1088 | ||
1089 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1090 | ||
1091 | if (urb->actual_length < sizeof(*event)) | |
1092 | return; | |
1093 | ||
1094 | /* test for split data in 8-byte chunks */ | |
1095 | if (test_and_clear_bit(EVENT_STS_SPLIT, &dev->flags)) { | |
1096 | cdc_ncm_speed_change(ctx, | |
84e77a8b | 1097 | (struct usb_cdc_speed_change *)urb->transfer_buffer); |
900d495a AO |
1098 | return; |
1099 | } | |
1100 | ||
1101 | event = urb->transfer_buffer; | |
1102 | ||
1103 | switch (event->bNotificationType) { | |
1104 | case USB_CDC_NOTIFY_NETWORK_CONNECTION: | |
1105 | /* | |
1106 | * According to the CDC NCM specification ch.7.1 | |
1107 | * USB_CDC_NOTIFY_NETWORK_CONNECTION notification shall be | |
1108 | * sent by device after USB_CDC_NOTIFY_SPEED_CHANGE. | |
1109 | */ | |
1110 | ctx->connected = event->wValue; | |
1111 | ||
1112 | printk(KERN_INFO KBUILD_MODNAME ": %s: network connection:" | |
1113 | " %sconnected\n", | |
1114 | ctx->netdev->name, ctx->connected ? "" : "dis"); | |
1115 | ||
1116 | if (ctx->connected) | |
1117 | netif_carrier_on(dev->net); | |
1118 | else { | |
1119 | netif_carrier_off(dev->net); | |
1120 | ctx->tx_speed = ctx->rx_speed = 0; | |
1121 | } | |
1122 | break; | |
1123 | ||
1124 | case USB_CDC_NOTIFY_SPEED_CHANGE: | |
84e77a8b AO |
1125 | if (urb->actual_length < (sizeof(*event) + |
1126 | sizeof(struct usb_cdc_speed_change))) | |
900d495a AO |
1127 | set_bit(EVENT_STS_SPLIT, &dev->flags); |
1128 | else | |
1129 | cdc_ncm_speed_change(ctx, | |
84e77a8b | 1130 | (struct usb_cdc_speed_change *) &event[1]); |
900d495a AO |
1131 | break; |
1132 | ||
1133 | default: | |
1134 | dev_err(&dev->udev->dev, "NCM: unexpected " | |
1135 | "notification 0x%02x!\n", event->bNotificationType); | |
1136 | break; | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | static int cdc_ncm_check_connect(struct usbnet *dev) | |
1141 | { | |
1142 | struct cdc_ncm_ctx *ctx; | |
1143 | ||
1144 | ctx = (struct cdc_ncm_ctx *)dev->data[0]; | |
1145 | if (ctx == NULL) | |
1146 | return 1; /* disconnected */ | |
1147 | ||
1148 | return !ctx->connected; | |
1149 | } | |
1150 | ||
1151 | static int | |
1152 | cdc_ncm_probe(struct usb_interface *udev, const struct usb_device_id *prod) | |
1153 | { | |
1154 | return usbnet_probe(udev, prod); | |
1155 | } | |
1156 | ||
1157 | static void cdc_ncm_disconnect(struct usb_interface *intf) | |
1158 | { | |
1159 | struct usbnet *dev = usb_get_intfdata(intf); | |
1160 | ||
1161 | if (dev == NULL) | |
1162 | return; /* already disconnected */ | |
1163 | ||
1164 | usbnet_disconnect(intf); | |
1165 | } | |
1166 | ||
1167 | static int cdc_ncm_manage_power(struct usbnet *dev, int status) | |
1168 | { | |
1169 | dev->intf->needs_remote_wakeup = status; | |
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | static const struct driver_info cdc_ncm_info = { | |
1174 | .description = "CDC NCM", | |
c261344d | 1175 | .flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET, |
900d495a AO |
1176 | .bind = cdc_ncm_bind, |
1177 | .unbind = cdc_ncm_unbind, | |
1178 | .check_connect = cdc_ncm_check_connect, | |
1179 | .manage_power = cdc_ncm_manage_power, | |
1180 | .status = cdc_ncm_status, | |
1181 | .rx_fixup = cdc_ncm_rx_fixup, | |
1182 | .tx_fixup = cdc_ncm_tx_fixup, | |
1183 | }; | |
1184 | ||
1185 | static struct usb_driver cdc_ncm_driver = { | |
1186 | .name = "cdc_ncm", | |
1187 | .id_table = cdc_devs, | |
1188 | .probe = cdc_ncm_probe, | |
1189 | .disconnect = cdc_ncm_disconnect, | |
1190 | .suspend = usbnet_suspend, | |
1191 | .resume = usbnet_resume, | |
85e3c65f | 1192 | .reset_resume = usbnet_resume, |
900d495a AO |
1193 | .supports_autosuspend = 1, |
1194 | }; | |
1195 | ||
1196 | static struct ethtool_ops cdc_ncm_ethtool_ops = { | |
1197 | .get_drvinfo = cdc_ncm_get_drvinfo, | |
1198 | .get_link = usbnet_get_link, | |
1199 | .get_msglevel = usbnet_get_msglevel, | |
1200 | .set_msglevel = usbnet_set_msglevel, | |
1201 | .get_settings = usbnet_get_settings, | |
1202 | .set_settings = usbnet_set_settings, | |
1203 | .nway_reset = usbnet_nway_reset, | |
1204 | }; | |
1205 | ||
1206 | static int __init cdc_ncm_init(void) | |
1207 | { | |
1208 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION "\n"); | |
1209 | return usb_register(&cdc_ncm_driver); | |
1210 | } | |
1211 | ||
1212 | module_init(cdc_ncm_init); | |
1213 | ||
1214 | static void __exit cdc_ncm_exit(void) | |
1215 | { | |
1216 | usb_deregister(&cdc_ncm_driver); | |
1217 | } | |
1218 | ||
1219 | module_exit(cdc_ncm_exit); | |
1220 | ||
1221 | MODULE_AUTHOR("Hans Petter Selasky"); | |
1222 | MODULE_DESCRIPTION("USB CDC NCM host driver"); | |
1223 | MODULE_LICENSE("Dual BSD/GPL"); |