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Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 12 years 9 months ago. By Lars-Peter Clausen, jz4740: Fix compile error | |
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1 | /* |
2 | * f_ncm.c -- USB CDC Network (NCM) link function driver |
3 | * |
4 | * Copyright (C) 2010 Nokia Corporation |
5 | * Contact: Yauheni Kaliuta <yauheni.kaliuta@nokia.com> |
6 | * |
7 | * The driver borrows from f_ecm.c which is: |
8 | * |
9 | * Copyright (C) 2003-2005,2008 David Brownell |
10 | * Copyright (C) 2008 Nokia Corporation |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU General Public License as published by |
14 | * the Free Software Foundation; either version 2 of the License, or |
15 | * (at your option) any later version. |
16 | * |
17 | * This program is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU General Public License for more details. |
21 | * |
22 | * You should have received a copy of the GNU General Public License |
23 | * along with this program; if not, write to the Free Software |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
25 | */ |
26 | |
27 | #include <linux/kernel.h> |
28 | #include <linux/device.h> |
29 | #include <linux/etherdevice.h> |
30 | #include <linux/crc32.h> |
31 | |
32 | #include <linux/usb/cdc.h> |
33 | |
34 | #include "u_ether.h" |
35 | |
36 | /* |
37 | * This function is a "CDC Network Control Model" (CDC NCM) Ethernet link. |
38 | * NCM is intended to be used with high-speed network attachments. |
39 | * |
40 | * Note that NCM requires the use of "alternate settings" for its data |
41 | * interface. This means that the set_alt() method has real work to do, |
42 | * and also means that a get_alt() method is required. |
43 | */ |
44 | |
45 | /* to trigger crc/non-crc ndp signature */ |
46 | |
47 | #define NCM_NDP_HDR_CRC_MASK 0x01000000 |
48 | #define NCM_NDP_HDR_CRC 0x01000000 |
49 | #define NCM_NDP_HDR_NOCRC 0x00000000 |
50 | |
51 | struct ncm_ep_descs { |
52 | struct usb_endpoint_descriptor *in; |
53 | struct usb_endpoint_descriptor *out; |
54 | struct usb_endpoint_descriptor *notify; |
55 | }; |
56 | |
57 | enum ncm_notify_state { |
58 | NCM_NOTIFY_NONE, /* don't notify */ |
59 | NCM_NOTIFY_CONNECT, /* issue CONNECT next */ |
60 | NCM_NOTIFY_SPEED, /* issue SPEED_CHANGE next */ |
61 | }; |
62 | |
63 | struct f_ncm { |
64 | struct gether port; |
65 | u8 ctrl_id, data_id; |
66 | |
67 | char ethaddr[14]; |
68 | |
69 | struct ncm_ep_descs fs; |
70 | struct ncm_ep_descs hs; |
71 | |
72 | struct usb_ep *notify; |
73 | struct usb_endpoint_descriptor *notify_desc; |
74 | struct usb_request *notify_req; |
75 | u8 notify_state; |
76 | bool is_open; |
77 | |
78 | struct ndp_parser_opts *parser_opts; |
79 | bool is_crc; |
80 | |
81 | /* |
82 | * for notification, it is accessed from both |
83 | * callback and ethernet open/close |
84 | */ |
85 | spinlock_t lock; |
86 | }; |
87 | |
88 | static inline struct f_ncm *func_to_ncm(struct usb_function *f) |
89 | { |
90 | return container_of(f, struct f_ncm, port.func); |
91 | } |
92 | |
93 | /* peak (theoretical) bulk transfer rate in bits-per-second */ |
94 | static inline unsigned ncm_bitrate(struct usb_gadget *g) |
95 | { |
96 | if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) |
97 | return 13 * 512 * 8 * 1000 * 8; |
98 | else |
99 | return 19 * 64 * 1 * 1000 * 8; |
100 | } |
101 | |
102 | /*-------------------------------------------------------------------------*/ |
103 | |
104 | /* |
105 | * We cannot group frames so use just the minimal size which ok to put |
106 | * one max-size ethernet frame. |
107 | * If the host can group frames, allow it to do that, 16K is selected, |
108 | * because it's used by default by the current linux host driver |
109 | */ |
110 | #define NTB_DEFAULT_IN_SIZE USB_CDC_NCM_NTB_MIN_IN_SIZE |
111 | #define NTB_OUT_SIZE 16384 |
112 | |
113 | /* |
114 | * skbs of size less than that will not be aligned |
115 | * to NCM's dwNtbInMaxSize to save bus bandwidth |
116 | */ |
117 | |
118 | #define MAX_TX_NONFIXED (512 * 3) |
119 | |
120 | #define FORMATS_SUPPORTED (USB_CDC_NCM_NTB16_SUPPORTED | \ |
121 | USB_CDC_NCM_NTB32_SUPPORTED) |
122 | |
123 | static struct usb_cdc_ncm_ntb_parameters ntb_parameters = { |
124 | .wLength = sizeof ntb_parameters, |
125 | .bmNtbFormatsSupported = cpu_to_le16(FORMATS_SUPPORTED), |
126 | .dwNtbInMaxSize = cpu_to_le32(NTB_DEFAULT_IN_SIZE), |
127 | .wNdpInDivisor = cpu_to_le16(4), |
128 | .wNdpInPayloadRemainder = cpu_to_le16(0), |
129 | .wNdpInAlignment = cpu_to_le16(4), |
130 | |
131 | .dwNtbOutMaxSize = cpu_to_le32(NTB_OUT_SIZE), |
132 | .wNdpOutDivisor = cpu_to_le16(4), |
133 | .wNdpOutPayloadRemainder = cpu_to_le16(0), |
134 | .wNdpOutAlignment = cpu_to_le16(4), |
135 | }; |
136 | |
137 | /* |
138 | * Use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one |
139 | * packet, to simplify cancellation; and a big transfer interval, to |
140 | * waste less bandwidth. |
141 | */ |
142 | |
143 | #define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */ |
144 | #define NCM_STATUS_BYTECOUNT 16 /* 8 byte header + data */ |
145 | |
146 | static struct usb_interface_assoc_descriptor ncm_iad_desc __initdata = { |
147 | .bLength = sizeof ncm_iad_desc, |
148 | .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, |
149 | |
150 | /* .bFirstInterface = DYNAMIC, */ |
151 | .bInterfaceCount = 2, /* control + data */ |
152 | .bFunctionClass = USB_CLASS_COMM, |
153 | .bFunctionSubClass = USB_CDC_SUBCLASS_NCM, |
154 | .bFunctionProtocol = USB_CDC_PROTO_NONE, |
155 | /* .iFunction = DYNAMIC */ |
156 | }; |
157 | |
158 | /* interface descriptor: */ |
159 | |
160 | static struct usb_interface_descriptor ncm_control_intf __initdata = { |
161 | .bLength = sizeof ncm_control_intf, |
162 | .bDescriptorType = USB_DT_INTERFACE, |
163 | |
164 | /* .bInterfaceNumber = DYNAMIC */ |
165 | .bNumEndpoints = 1, |
166 | .bInterfaceClass = USB_CLASS_COMM, |
167 | .bInterfaceSubClass = USB_CDC_SUBCLASS_NCM, |
168 | .bInterfaceProtocol = USB_CDC_PROTO_NONE, |
169 | /* .iInterface = DYNAMIC */ |
170 | }; |
171 | |
172 | static struct usb_cdc_header_desc ncm_header_desc __initdata = { |
173 | .bLength = sizeof ncm_header_desc, |
174 | .bDescriptorType = USB_DT_CS_INTERFACE, |
175 | .bDescriptorSubType = USB_CDC_HEADER_TYPE, |
176 | |
177 | .bcdCDC = cpu_to_le16(0x0110), |
178 | }; |
179 | |
180 | static struct usb_cdc_union_desc ncm_union_desc __initdata = { |
181 | .bLength = sizeof(ncm_union_desc), |
182 | .bDescriptorType = USB_DT_CS_INTERFACE, |
183 | .bDescriptorSubType = USB_CDC_UNION_TYPE, |
184 | /* .bMasterInterface0 = DYNAMIC */ |
185 | /* .bSlaveInterface0 = DYNAMIC */ |
186 | }; |
187 | |
188 | static struct usb_cdc_ether_desc ecm_desc __initdata = { |
189 | .bLength = sizeof ecm_desc, |
190 | .bDescriptorType = USB_DT_CS_INTERFACE, |
191 | .bDescriptorSubType = USB_CDC_ETHERNET_TYPE, |
192 | |
193 | /* this descriptor actually adds value, surprise! */ |
194 | /* .iMACAddress = DYNAMIC */ |
195 | .bmEthernetStatistics = cpu_to_le32(0), /* no statistics */ |
196 | .wMaxSegmentSize = cpu_to_le16(ETH_FRAME_LEN), |
197 | .wNumberMCFilters = cpu_to_le16(0), |
198 | .bNumberPowerFilters = 0, |
199 | }; |
200 | |
201 | #define NCAPS (USB_CDC_NCM_NCAP_ETH_FILTER | USB_CDC_NCM_NCAP_CRC_MODE) |
202 | |
203 | static struct usb_cdc_ncm_desc ncm_desc __initdata = { |
204 | .bLength = sizeof ncm_desc, |
205 | .bDescriptorType = USB_DT_CS_INTERFACE, |
206 | .bDescriptorSubType = USB_CDC_NCM_TYPE, |
207 | |
208 | .bcdNcmVersion = cpu_to_le16(0x0100), |
209 | /* can process SetEthernetPacketFilter */ |
210 | .bmNetworkCapabilities = NCAPS, |
211 | }; |
212 | |
213 | /* the default data interface has no endpoints ... */ |
214 | |
215 | static struct usb_interface_descriptor ncm_data_nop_intf __initdata = { |
216 | .bLength = sizeof ncm_data_nop_intf, |
217 | .bDescriptorType = USB_DT_INTERFACE, |
218 | |
219 | .bInterfaceNumber = 1, |
220 | .bAlternateSetting = 0, |
221 | .bNumEndpoints = 0, |
222 | .bInterfaceClass = USB_CLASS_CDC_DATA, |
223 | .bInterfaceSubClass = 0, |
224 | .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB, |
225 | /* .iInterface = DYNAMIC */ |
226 | }; |
227 | |
228 | /* ... but the "real" data interface has two bulk endpoints */ |
229 | |
230 | static struct usb_interface_descriptor ncm_data_intf __initdata = { |
231 | .bLength = sizeof ncm_data_intf, |
232 | .bDescriptorType = USB_DT_INTERFACE, |
233 | |
234 | .bInterfaceNumber = 1, |
235 | .bAlternateSetting = 1, |
236 | .bNumEndpoints = 2, |
237 | .bInterfaceClass = USB_CLASS_CDC_DATA, |
238 | .bInterfaceSubClass = 0, |
239 | .bInterfaceProtocol = USB_CDC_NCM_PROTO_NTB, |
240 | /* .iInterface = DYNAMIC */ |
241 | }; |
242 | |
243 | /* full speed support: */ |
244 | |
245 | static struct usb_endpoint_descriptor fs_ncm_notify_desc __initdata = { |
246 | .bLength = USB_DT_ENDPOINT_SIZE, |
247 | .bDescriptorType = USB_DT_ENDPOINT, |
248 | |
249 | .bEndpointAddress = USB_DIR_IN, |
250 | .bmAttributes = USB_ENDPOINT_XFER_INT, |
251 | .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT), |
252 | .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC, |
253 | }; |
254 | |
255 | static struct usb_endpoint_descriptor fs_ncm_in_desc __initdata = { |
256 | .bLength = USB_DT_ENDPOINT_SIZE, |
257 | .bDescriptorType = USB_DT_ENDPOINT, |
258 | |
259 | .bEndpointAddress = USB_DIR_IN, |
260 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
261 | }; |
262 | |
263 | static struct usb_endpoint_descriptor fs_ncm_out_desc __initdata = { |
264 | .bLength = USB_DT_ENDPOINT_SIZE, |
265 | .bDescriptorType = USB_DT_ENDPOINT, |
266 | |
267 | .bEndpointAddress = USB_DIR_OUT, |
268 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
269 | }; |
270 | |
271 | static struct usb_descriptor_header *ncm_fs_function[] __initdata = { |
272 | (struct usb_descriptor_header *) &ncm_iad_desc, |
273 | /* CDC NCM control descriptors */ |
274 | (struct usb_descriptor_header *) &ncm_control_intf, |
275 | (struct usb_descriptor_header *) &ncm_header_desc, |
276 | (struct usb_descriptor_header *) &ncm_union_desc, |
277 | (struct usb_descriptor_header *) &ecm_desc, |
278 | (struct usb_descriptor_header *) &ncm_desc, |
279 | (struct usb_descriptor_header *) &fs_ncm_notify_desc, |
280 | /* data interface, altsettings 0 and 1 */ |
281 | (struct usb_descriptor_header *) &ncm_data_nop_intf, |
282 | (struct usb_descriptor_header *) &ncm_data_intf, |
283 | (struct usb_descriptor_header *) &fs_ncm_in_desc, |
284 | (struct usb_descriptor_header *) &fs_ncm_out_desc, |
285 | NULL, |
286 | }; |
287 | |
288 | /* high speed support: */ |
289 | |
290 | static struct usb_endpoint_descriptor hs_ncm_notify_desc __initdata = { |
291 | .bLength = USB_DT_ENDPOINT_SIZE, |
292 | .bDescriptorType = USB_DT_ENDPOINT, |
293 | |
294 | .bEndpointAddress = USB_DIR_IN, |
295 | .bmAttributes = USB_ENDPOINT_XFER_INT, |
296 | .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT), |
297 | .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, |
298 | }; |
299 | static struct usb_endpoint_descriptor hs_ncm_in_desc __initdata = { |
300 | .bLength = USB_DT_ENDPOINT_SIZE, |
301 | .bDescriptorType = USB_DT_ENDPOINT, |
302 | |
303 | .bEndpointAddress = USB_DIR_IN, |
304 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
305 | .wMaxPacketSize = cpu_to_le16(512), |
306 | }; |
307 | |
308 | static struct usb_endpoint_descriptor hs_ncm_out_desc __initdata = { |
309 | .bLength = USB_DT_ENDPOINT_SIZE, |
310 | .bDescriptorType = USB_DT_ENDPOINT, |
311 | |
312 | .bEndpointAddress = USB_DIR_OUT, |
313 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
314 | .wMaxPacketSize = cpu_to_le16(512), |
315 | }; |
316 | |
317 | static struct usb_descriptor_header *ncm_hs_function[] __initdata = { |
318 | (struct usb_descriptor_header *) &ncm_iad_desc, |
319 | /* CDC NCM control descriptors */ |
320 | (struct usb_descriptor_header *) &ncm_control_intf, |
321 | (struct usb_descriptor_header *) &ncm_header_desc, |
322 | (struct usb_descriptor_header *) &ncm_union_desc, |
323 | (struct usb_descriptor_header *) &ecm_desc, |
324 | (struct usb_descriptor_header *) &ncm_desc, |
325 | (struct usb_descriptor_header *) &hs_ncm_notify_desc, |
326 | /* data interface, altsettings 0 and 1 */ |
327 | (struct usb_descriptor_header *) &ncm_data_nop_intf, |
328 | (struct usb_descriptor_header *) &ncm_data_intf, |
329 | (struct usb_descriptor_header *) &hs_ncm_in_desc, |
330 | (struct usb_descriptor_header *) &hs_ncm_out_desc, |
331 | NULL, |
332 | }; |
333 | |
334 | /* string descriptors: */ |
335 | |
336 | #define STRING_CTRL_IDX 0 |
337 | #define STRING_MAC_IDX 1 |
338 | #define STRING_DATA_IDX 2 |
339 | #define STRING_IAD_IDX 3 |
340 | |
341 | static struct usb_string ncm_string_defs[] = { |
342 | [STRING_CTRL_IDX].s = "CDC Network Control Model (NCM)", |
343 | [STRING_MAC_IDX].s = NULL /* DYNAMIC */, |
344 | [STRING_DATA_IDX].s = "CDC Network Data", |
345 | [STRING_IAD_IDX].s = "CDC NCM", |
346 | { } /* end of list */ |
347 | }; |
348 | |
349 | static struct usb_gadget_strings ncm_string_table = { |
350 | .language = 0x0409, /* en-us */ |
351 | .strings = ncm_string_defs, |
352 | }; |
353 | |
354 | static struct usb_gadget_strings *ncm_strings[] = { |
355 | &ncm_string_table, |
356 | NULL, |
357 | }; |
358 | |
359 | /* |
360 | * Here are options for NCM Datagram Pointer table (NDP) parser. |
361 | * There are 2 different formats: NDP16 and NDP32 in the spec (ch. 3), |
362 | * in NDP16 offsets and sizes fields are 1 16bit word wide, |
363 | * in NDP32 -- 2 16bit words wide. Also signatures are different. |
364 | * To make the parser code the same, put the differences in the structure, |
365 | * and switch pointers to the structures when the format is changed. |
366 | */ |
367 | |
368 | struct ndp_parser_opts { |
369 | u32 nth_sign; |
370 | u32 ndp_sign; |
371 | unsigned nth_size; |
372 | unsigned ndp_size; |
373 | unsigned ndplen_align; |
374 | /* sizes in u16 units */ |
375 | unsigned dgram_item_len; /* index or length */ |
376 | unsigned block_length; |
377 | unsigned fp_index; |
378 | unsigned reserved1; |
379 | unsigned reserved2; |
380 | unsigned next_fp_index; |
381 | }; |
382 | |
383 | #define INIT_NDP16_OPTS { \ |
384 | .nth_sign = USB_CDC_NCM_NTH16_SIGN, \ |
385 | .ndp_sign = USB_CDC_NCM_NDP16_NOCRC_SIGN, \ |
386 | .nth_size = sizeof(struct usb_cdc_ncm_nth16), \ |
387 | .ndp_size = sizeof(struct usb_cdc_ncm_ndp16), \ |
388 | .ndplen_align = 4, \ |
389 | .dgram_item_len = 1, \ |
390 | .block_length = 1, \ |
391 | .fp_index = 1, \ |
392 | .reserved1 = 0, \ |
393 | .reserved2 = 0, \ |
394 | .next_fp_index = 1, \ |
395 | } |
396 | |
397 | |
398 | #define INIT_NDP32_OPTS { \ |
399 | .nth_sign = USB_CDC_NCM_NTH32_SIGN, \ |
400 | .ndp_sign = USB_CDC_NCM_NDP32_NOCRC_SIGN, \ |
401 | .nth_size = sizeof(struct usb_cdc_ncm_nth32), \ |
402 | .ndp_size = sizeof(struct usb_cdc_ncm_ndp32), \ |
403 | .ndplen_align = 8, \ |
404 | .dgram_item_len = 2, \ |
405 | .block_length = 2, \ |
406 | .fp_index = 2, \ |
407 | .reserved1 = 1, \ |
408 | .reserved2 = 2, \ |
409 | .next_fp_index = 2, \ |
410 | } |
411 | |
412 | static struct ndp_parser_opts ndp16_opts = INIT_NDP16_OPTS; |
413 | static struct ndp_parser_opts ndp32_opts = INIT_NDP32_OPTS; |
414 | |
415 | static inline void put_ncm(__le16 **p, unsigned size, unsigned val) |
416 | { |
417 | switch (size) { |
418 | case 1: |
419 | put_unaligned_le16((u16)val, *p); |
420 | break; |
421 | case 2: |
422 | put_unaligned_le32((u32)val, *p); |
423 | |
424 | break; |
425 | default: |
426 | BUG(); |
427 | } |
428 | |
429 | *p += size; |
430 | } |
431 | |
432 | static inline unsigned get_ncm(__le16 **p, unsigned size) |
433 | { |
434 | unsigned tmp; |
435 | |
436 | switch (size) { |
437 | case 1: |
438 | tmp = get_unaligned_le16(*p); |
439 | break; |
440 | case 2: |
441 | tmp = get_unaligned_le32(*p); |
442 | break; |
443 | default: |
444 | BUG(); |
445 | } |
446 | |
447 | *p += size; |
448 | return tmp; |
449 | } |
450 | |
451 | /*-------------------------------------------------------------------------*/ |
452 | |
453 | static inline void ncm_reset_values(struct f_ncm *ncm) |
454 | { |
455 | ncm->parser_opts = &ndp16_opts; |
456 | ncm->is_crc = false; |
457 | ncm->port.cdc_filter = DEFAULT_FILTER; |
458 | |
459 | /* doesn't make sense for ncm, fixed size used */ |
460 | ncm->port.header_len = 0; |
461 | |
462 | ncm->port.fixed_out_len = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize); |
463 | ncm->port.fixed_in_len = NTB_DEFAULT_IN_SIZE; |
464 | } |
465 | |
466 | /* |
467 | * Context: ncm->lock held |
468 | */ |
469 | static void ncm_do_notify(struct f_ncm *ncm) |
470 | { |
471 | struct usb_request *req = ncm->notify_req; |
472 | struct usb_cdc_notification *event; |
473 | struct usb_composite_dev *cdev = ncm->port.func.config->cdev; |
474 | __le32 *data; |
475 | int status; |
476 | |
477 | /* notification already in flight? */ |
478 | if (!req) |
479 | return; |
480 | |
481 | event = req->buf; |
482 | switch (ncm->notify_state) { |
483 | case NCM_NOTIFY_NONE: |
484 | return; |
485 | |
486 | case NCM_NOTIFY_CONNECT: |
487 | event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION; |
488 | if (ncm->is_open) |
489 | event->wValue = cpu_to_le16(1); |
490 | else |
491 | event->wValue = cpu_to_le16(0); |
492 | event->wLength = 0; |
493 | req->length = sizeof *event; |
494 | |
495 | DBG(cdev, "notify connect %s\n", |
496 | ncm->is_open ? "true" : "false"); |
497 | ncm->notify_state = NCM_NOTIFY_NONE; |
498 | break; |
499 | |
500 | case NCM_NOTIFY_SPEED: |
501 | event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE; |
502 | event->wValue = cpu_to_le16(0); |
503 | event->wLength = cpu_to_le16(8); |
504 | req->length = NCM_STATUS_BYTECOUNT; |
505 | |
506 | /* SPEED_CHANGE data is up/down speeds in bits/sec */ |
507 | data = req->buf + sizeof *event; |
508 | data[0] = cpu_to_le32(ncm_bitrate(cdev->gadget)); |
509 | data[1] = data[0]; |
510 | |
511 | DBG(cdev, "notify speed %d\n", ncm_bitrate(cdev->gadget)); |
512 | ncm->notify_state = NCM_NOTIFY_CONNECT; |
513 | break; |
514 | } |
515 | event->bmRequestType = 0xA1; |
516 | event->wIndex = cpu_to_le16(ncm->ctrl_id); |
517 | |
518 | ncm->notify_req = NULL; |
519 | /* |
520 | * In double buffering if there is a space in FIFO, |
521 | * completion callback can be called right after the call, |
522 | * so unlocking |
523 | */ |
524 | spin_unlock(&ncm->lock); |
525 | status = usb_ep_queue(ncm->notify, req, GFP_ATOMIC); |
526 | spin_lock(&ncm->lock); |
527 | if (status < 0) { |
528 | ncm->notify_req = req; |
529 | DBG(cdev, "notify --> %d\n", status); |
530 | } |
531 | } |
532 | |
533 | /* |
534 | * Context: ncm->lock held |
535 | */ |
536 | static void ncm_notify(struct f_ncm *ncm) |
537 | { |
538 | /* |
539 | * NOTE on most versions of Linux, host side cdc-ethernet |
540 | * won't listen for notifications until its netdevice opens. |
541 | * The first notification then sits in the FIFO for a long |
542 | * time, and the second one is queued. |
543 | * |
544 | * If ncm_notify() is called before the second (CONNECT) |
545 | * notification is sent, then it will reset to send the SPEED |
546 | * notificaion again (and again, and again), but it's not a problem |
547 | */ |
548 | ncm->notify_state = NCM_NOTIFY_SPEED; |
549 | ncm_do_notify(ncm); |
550 | } |
551 | |
552 | static void ncm_notify_complete(struct usb_ep *ep, struct usb_request *req) |
553 | { |
554 | struct f_ncm *ncm = req->context; |
555 | struct usb_composite_dev *cdev = ncm->port.func.config->cdev; |
556 | struct usb_cdc_notification *event = req->buf; |
557 | |
558 | spin_lock(&ncm->lock); |
559 | switch (req->status) { |
560 | case 0: |
561 | VDBG(cdev, "Notification %02x sent\n", |
562 | event->bNotificationType); |
563 | break; |
564 | case -ECONNRESET: |
565 | case -ESHUTDOWN: |
566 | ncm->notify_state = NCM_NOTIFY_NONE; |
567 | break; |
568 | default: |
569 | DBG(cdev, "event %02x --> %d\n", |
570 | event->bNotificationType, req->status); |
571 | break; |
572 | } |
573 | ncm->notify_req = req; |
574 | ncm_do_notify(ncm); |
575 | spin_unlock(&ncm->lock); |
576 | } |
577 | |
578 | static void ncm_ep0out_complete(struct usb_ep *ep, struct usb_request *req) |
579 | { |
580 | /* now for SET_NTB_INPUT_SIZE only */ |
581 | unsigned in_size; |
582 | struct usb_function *f = req->context; |
583 | struct f_ncm *ncm = func_to_ncm(f); |
584 | struct usb_composite_dev *cdev = ep->driver_data; |
585 | |
586 | req->context = NULL; |
587 | if (req->status || req->actual != req->length) { |
588 | DBG(cdev, "Bad control-OUT transfer\n"); |
589 | goto invalid; |
590 | } |
591 | |
592 | in_size = get_unaligned_le32(req->buf); |
593 | if (in_size < USB_CDC_NCM_NTB_MIN_IN_SIZE || |
594 | in_size > le32_to_cpu(ntb_parameters.dwNtbInMaxSize)) { |
595 | DBG(cdev, "Got wrong INPUT SIZE (%d) from host\n", in_size); |
596 | goto invalid; |
597 | } |
598 | |
599 | ncm->port.fixed_in_len = in_size; |
600 | VDBG(cdev, "Set NTB INPUT SIZE %d\n", in_size); |
601 | return; |
602 | |
603 | invalid: |
604 | usb_ep_set_halt(ep); |
605 | return; |
606 | } |
607 | |
608 | static int ncm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) |
609 | { |
610 | struct f_ncm *ncm = func_to_ncm(f); |
611 | struct usb_composite_dev *cdev = f->config->cdev; |
612 | struct usb_request *req = cdev->req; |
613 | int value = -EOPNOTSUPP; |
614 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
615 | u16 w_value = le16_to_cpu(ctrl->wValue); |
616 | u16 w_length = le16_to_cpu(ctrl->wLength); |
617 | |
618 | /* |
619 | * composite driver infrastructure handles everything except |
620 | * CDC class messages; interface activation uses set_alt(). |
621 | */ |
622 | switch ((ctrl->bRequestType << 8) | ctrl->bRequest) { |
623 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) |
624 | | USB_CDC_SET_ETHERNET_PACKET_FILTER: |
625 | /* |
626 | * see 6.2.30: no data, wIndex = interface, |
627 | * wValue = packet filter bitmap |
628 | */ |
629 | if (w_length != 0 || w_index != ncm->ctrl_id) |
630 | goto invalid; |
631 | DBG(cdev, "packet filter %02x\n", w_value); |
632 | /* |
633 | * REVISIT locking of cdc_filter. This assumes the UDC |
634 | * driver won't have a concurrent packet TX irq running on |
635 | * another CPU; or that if it does, this write is atomic... |
636 | */ |
637 | ncm->port.cdc_filter = w_value; |
638 | value = 0; |
639 | break; |
640 | /* |
641 | * and optionally: |
642 | * case USB_CDC_SEND_ENCAPSULATED_COMMAND: |
643 | * case USB_CDC_GET_ENCAPSULATED_RESPONSE: |
644 | * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS: |
645 | * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER: |
646 | * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER: |
647 | * case USB_CDC_GET_ETHERNET_STATISTIC: |
648 | */ |
649 | |
650 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) |
651 | | USB_CDC_GET_NTB_PARAMETERS: |
652 | |
653 | if (w_length == 0 || w_value != 0 || w_index != ncm->ctrl_id) |
654 | goto invalid; |
655 | value = w_length > sizeof ntb_parameters ? |
656 | sizeof ntb_parameters : w_length; |
657 | memcpy(req->buf, &ntb_parameters, value); |
658 | VDBG(cdev, "Host asked NTB parameters\n"); |
659 | break; |
660 | |
661 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) |
662 | | USB_CDC_GET_NTB_INPUT_SIZE: |
663 | |
664 | if (w_length < 4 || w_value != 0 || w_index != ncm->ctrl_id) |
665 | goto invalid; |
666 | put_unaligned_le32(ncm->port.fixed_in_len, req->buf); |
667 | value = 4; |
668 | VDBG(cdev, "Host asked INPUT SIZE, sending %d\n", |
669 | ncm->port.fixed_in_len); |
670 | break; |
671 | |
672 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) |
673 | | USB_CDC_SET_NTB_INPUT_SIZE: |
674 | { |
675 | if (w_length != 4 || w_value != 0 || w_index != ncm->ctrl_id) |
676 | goto invalid; |
677 | req->complete = ncm_ep0out_complete; |
678 | req->length = w_length; |
679 | req->context = f; |
680 | |
681 | value = req->length; |
682 | break; |
683 | } |
684 | |
685 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) |
686 | | USB_CDC_GET_NTB_FORMAT: |
687 | { |
688 | uint16_t format; |
689 | |
690 | if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id) |
691 | goto invalid; |
692 | format = (ncm->parser_opts == &ndp16_opts) ? 0x0000 : 0x0001; |
693 | put_unaligned_le16(format, req->buf); |
694 | value = 2; |
695 | VDBG(cdev, "Host asked NTB FORMAT, sending %d\n", format); |
696 | break; |
697 | } |
698 | |
699 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) |
700 | | USB_CDC_SET_NTB_FORMAT: |
701 | { |
702 | if (w_length != 0 || w_index != ncm->ctrl_id) |
703 | goto invalid; |
704 | switch (w_value) { |
705 | case 0x0000: |
706 | ncm->parser_opts = &ndp16_opts; |
707 | DBG(cdev, "NCM16 selected\n"); |
708 | break; |
709 | case 0x0001: |
710 | ncm->parser_opts = &ndp32_opts; |
711 | DBG(cdev, "NCM32 selected\n"); |
712 | break; |
713 | default: |
714 | goto invalid; |
715 | } |
716 | value = 0; |
717 | break; |
718 | } |
719 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) |
720 | | USB_CDC_GET_CRC_MODE: |
721 | { |
722 | uint16_t is_crc; |
723 | |
724 | if (w_length < 2 || w_value != 0 || w_index != ncm->ctrl_id) |
725 | goto invalid; |
726 | is_crc = ncm->is_crc ? 0x0001 : 0x0000; |
727 | put_unaligned_le16(is_crc, req->buf); |
728 | value = 2; |
729 | VDBG(cdev, "Host asked CRC MODE, sending %d\n", is_crc); |
730 | break; |
731 | } |
732 | |
733 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) |
734 | | USB_CDC_SET_CRC_MODE: |
735 | { |
736 | int ndp_hdr_crc = 0; |
737 | |
738 | if (w_length != 0 || w_index != ncm->ctrl_id) |
739 | goto invalid; |
740 | switch (w_value) { |
741 | case 0x0000: |
742 | ncm->is_crc = false; |
743 | ndp_hdr_crc = NCM_NDP_HDR_NOCRC; |
744 | DBG(cdev, "non-CRC mode selected\n"); |
745 | break; |
746 | case 0x0001: |
747 | ncm->is_crc = true; |
748 | ndp_hdr_crc = NCM_NDP_HDR_CRC; |
749 | DBG(cdev, "CRC mode selected\n"); |
750 | break; |
751 | default: |
752 | goto invalid; |
753 | } |
754 | ncm->parser_opts->ndp_sign &= ~NCM_NDP_HDR_CRC_MASK; |
755 | ncm->parser_opts->ndp_sign |= ndp_hdr_crc; |
756 | value = 0; |
757 | break; |
758 | } |
759 | |
760 | /* and disabled in ncm descriptor: */ |
761 | /* case USB_CDC_GET_NET_ADDRESS: */ |
762 | /* case USB_CDC_SET_NET_ADDRESS: */ |
763 | /* case USB_CDC_GET_MAX_DATAGRAM_SIZE: */ |
764 | /* case USB_CDC_SET_MAX_DATAGRAM_SIZE: */ |
765 | |
766 | default: |
767 | invalid: |
768 | DBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", |
769 | ctrl->bRequestType, ctrl->bRequest, |
770 | w_value, w_index, w_length); |
771 | } |
772 | |
773 | /* respond with data transfer or status phase? */ |
774 | if (value >= 0) { |
775 | DBG(cdev, "ncm req%02x.%02x v%04x i%04x l%d\n", |
776 | ctrl->bRequestType, ctrl->bRequest, |
777 | w_value, w_index, w_length); |
778 | req->zero = 0; |
779 | req->length = value; |
780 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); |
781 | if (value < 0) |
782 | ERROR(cdev, "ncm req %02x.%02x response err %d\n", |
783 | ctrl->bRequestType, ctrl->bRequest, |
784 | value); |
785 | } |
786 | |
787 | /* device either stalls (value < 0) or reports success */ |
788 | return value; |
789 | } |
790 | |
791 | |
792 | static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt) |
793 | { |
794 | struct f_ncm *ncm = func_to_ncm(f); |
795 | struct usb_composite_dev *cdev = f->config->cdev; |
796 | |
797 | /* Control interface has only altsetting 0 */ |
798 | if (intf == ncm->ctrl_id) { |
799 | if (alt != 0) |
800 | goto fail; |
801 | |
802 | if (ncm->notify->driver_data) { |
803 | DBG(cdev, "reset ncm control %d\n", intf); |
804 | usb_ep_disable(ncm->notify); |
805 | } else { |
806 | DBG(cdev, "init ncm ctrl %d\n", intf); |
807 | ncm->notify_desc = ep_choose(cdev->gadget, |
808 | ncm->hs.notify, |
809 | ncm->fs.notify); |
810 | } |
811 | usb_ep_enable(ncm->notify, ncm->notify_desc); |
812 | ncm->notify->driver_data = ncm; |
813 | |
814 | /* Data interface has two altsettings, 0 and 1 */ |
815 | } else if (intf == ncm->data_id) { |
816 | if (alt > 1) |
817 | goto fail; |
818 | |
819 | if (ncm->port.in_ep->driver_data) { |
820 | DBG(cdev, "reset ncm\n"); |
821 | gether_disconnect(&ncm->port); |
822 | ncm_reset_values(ncm); |
823 | } |
824 | |
825 | /* |
826 | * CDC Network only sends data in non-default altsettings. |
827 | * Changing altsettings resets filters, statistics, etc. |
828 | */ |
829 | if (alt == 1) { |
830 | struct net_device *net; |
831 | |
832 | if (!ncm->port.in) { |
833 | DBG(cdev, "init ncm\n"); |
834 | ncm->port.in = ep_choose(cdev->gadget, |
835 | ncm->hs.in, |
836 | ncm->fs.in); |
837 | ncm->port.out = ep_choose(cdev->gadget, |
838 | ncm->hs.out, |
839 | ncm->fs.out); |
840 | } |
841 | |
842 | /* TODO */ |
843 | /* Enable zlps by default for NCM conformance; |
844 | * override for musb_hdrc (avoids txdma ovhead) |
845 | */ |
846 | ncm->port.is_zlp_ok = !( |
847 | gadget_is_musbhdrc(cdev->gadget) |
848 | ); |
849 | ncm->port.cdc_filter = DEFAULT_FILTER; |
850 | DBG(cdev, "activate ncm\n"); |
851 | net = gether_connect(&ncm->port); |
852 | if (IS_ERR(net)) |
853 | return PTR_ERR(net); |
854 | } |
855 | |
856 | spin_lock(&ncm->lock); |
857 | ncm_notify(ncm); |
858 | spin_unlock(&ncm->lock); |
859 | } else |
860 | goto fail; |
861 | |
862 | return 0; |
863 | fail: |
864 | return -EINVAL; |
865 | } |
866 | |
867 | /* |
868 | * Because the data interface supports multiple altsettings, |
869 | * this NCM function *MUST* implement a get_alt() method. |
870 | */ |
871 | static int ncm_get_alt(struct usb_function *f, unsigned intf) |
872 | { |
873 | struct f_ncm *ncm = func_to_ncm(f); |
874 | |
875 | if (intf == ncm->ctrl_id) |
876 | return 0; |
877 | return ncm->port.in_ep->driver_data ? 1 : 0; |
878 | } |
879 | |
880 | static struct sk_buff *ncm_wrap_ntb(struct gether *port, |
881 | struct sk_buff *skb) |
882 | { |
883 | struct f_ncm *ncm = func_to_ncm(&port->func); |
884 | struct sk_buff *skb2; |
885 | int ncb_len = 0; |
886 | __le16 *tmp; |
887 | int div = ntb_parameters.wNdpInDivisor; |
888 | int rem = ntb_parameters.wNdpInPayloadRemainder; |
889 | int pad; |
890 | int ndp_align = ntb_parameters.wNdpInAlignment; |
891 | int ndp_pad; |
892 | unsigned max_size = ncm->port.fixed_in_len; |
893 | struct ndp_parser_opts *opts = ncm->parser_opts; |
894 | unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0; |
895 | |
896 | ncb_len += opts->nth_size; |
897 | ndp_pad = ALIGN(ncb_len, ndp_align) - ncb_len; |
898 | ncb_len += ndp_pad; |
899 | ncb_len += opts->ndp_size; |
900 | ncb_len += 2 * 2 * opts->dgram_item_len; /* Datagram entry */ |
901 | ncb_len += 2 * 2 * opts->dgram_item_len; /* Zero datagram entry */ |
902 | pad = ALIGN(ncb_len, div) + rem - ncb_len; |
903 | ncb_len += pad; |
904 | |
905 | if (ncb_len + skb->len + crc_len > max_size) { |
906 | dev_kfree_skb_any(skb); |
907 | return NULL; |
908 | } |
909 | |
910 | skb2 = skb_copy_expand(skb, ncb_len, |
911 | max_size - skb->len - ncb_len - crc_len, |
912 | GFP_ATOMIC); |
913 | dev_kfree_skb_any(skb); |
914 | if (!skb2) |
915 | return NULL; |
916 | |
917 | skb = skb2; |
918 | |
919 | tmp = (void *) skb_push(skb, ncb_len); |
920 | memset(tmp, 0, ncb_len); |
921 | |
922 | put_unaligned_le32(opts->nth_sign, tmp); /* dwSignature */ |
923 | tmp += 2; |
924 | /* wHeaderLength */ |
925 | put_unaligned_le16(opts->nth_size, tmp++); |
926 | tmp++; /* skip wSequence */ |
927 | put_ncm(&tmp, opts->block_length, skb->len); /* (d)wBlockLength */ |
928 | /* (d)wFpIndex */ |
929 | /* the first pointer is right after the NTH + align */ |
930 | put_ncm(&tmp, opts->fp_index, opts->nth_size + ndp_pad); |
931 | |
932 | tmp = (void *)tmp + ndp_pad; |
933 | |
934 | /* NDP */ |
935 | put_unaligned_le32(opts->ndp_sign, tmp); /* dwSignature */ |
936 | tmp += 2; |
937 | /* wLength */ |
938 | put_unaligned_le16(ncb_len - opts->nth_size - pad, tmp++); |
939 | |
940 | tmp += opts->reserved1; |
941 | tmp += opts->next_fp_index; /* skip reserved (d)wNextFpIndex */ |
942 | tmp += opts->reserved2; |
943 | |
944 | if (ncm->is_crc) { |
945 | uint32_t crc; |
946 | |
947 | crc = ~crc32_le(~0, |
948 | skb->data + ncb_len, |
949 | skb->len - ncb_len); |
950 | put_unaligned_le32(crc, skb->data + skb->len); |
951 | skb_put(skb, crc_len); |
952 | } |
953 | |
954 | /* (d)wDatagramIndex[0] */ |
955 | put_ncm(&tmp, opts->dgram_item_len, ncb_len); |
956 | /* (d)wDatagramLength[0] */ |
957 | put_ncm(&tmp, opts->dgram_item_len, skb->len - ncb_len); |
958 | /* (d)wDatagramIndex[1] and (d)wDatagramLength[1] already zeroed */ |
959 | |
960 | if (skb->len > MAX_TX_NONFIXED) |
961 | memset(skb_put(skb, max_size - skb->len), |
962 | 0, max_size - skb->len); |
963 | |
964 | return skb; |
965 | } |
966 | |
967 | static int ncm_unwrap_ntb(struct gether *port, |
968 | struct sk_buff *skb, |
969 | struct sk_buff_head *list) |
970 | { |
971 | struct f_ncm *ncm = func_to_ncm(&port->func); |
972 | __le16 *tmp = (void *) skb->data; |
973 | unsigned index, index2; |
974 | unsigned dg_len, dg_len2; |
975 | unsigned ndp_len; |
976 | struct sk_buff *skb2; |
977 | int ret = -EINVAL; |
978 | unsigned max_size = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize); |
979 | struct ndp_parser_opts *opts = ncm->parser_opts; |
980 | unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0; |
981 | int dgram_counter; |
982 | |
983 | /* dwSignature */ |
984 | if (get_unaligned_le32(tmp) != opts->nth_sign) { |
985 | INFO(port->func.config->cdev, "Wrong NTH SIGN, skblen %d\n", |
986 | skb->len); |
987 | print_hex_dump(KERN_INFO, "HEAD:", DUMP_PREFIX_ADDRESS, 32, 1, |
988 | skb->data, 32, false); |
989 | |
990 | goto err; |
991 | } |
992 | tmp += 2; |
993 | /* wHeaderLength */ |
994 | if (get_unaligned_le16(tmp++) != opts->nth_size) { |
995 | INFO(port->func.config->cdev, "Wrong NTB headersize\n"); |
996 | goto err; |
997 | } |
998 | tmp++; /* skip wSequence */ |
999 | |
1000 | /* (d)wBlockLength */ |
1001 | if (get_ncm(&tmp, opts->block_length) > max_size) { |
1002 | INFO(port->func.config->cdev, "OUT size exceeded\n"); |
1003 | goto err; |
1004 | } |
1005 | |
1006 | index = get_ncm(&tmp, opts->fp_index); |
1007 | /* NCM 3.2 */ |
1008 | if (((index % 4) != 0) && (index < opts->nth_size)) { |
1009 | INFO(port->func.config->cdev, "Bad index: %x\n", |
1010 | index); |
1011 | goto err; |
1012 | } |
1013 | |
1014 | /* walk through NDP */ |
1015 | tmp = ((void *)skb->data) + index; |
1016 | if (get_unaligned_le32(tmp) != opts->ndp_sign) { |
1017 | INFO(port->func.config->cdev, "Wrong NDP SIGN\n"); |
1018 | goto err; |
1019 | } |
1020 | tmp += 2; |
1021 | |
1022 | ndp_len = get_unaligned_le16(tmp++); |
1023 | /* |
1024 | * NCM 3.3.1 |
1025 | * entry is 2 items |
1026 | * item size is 16/32 bits, opts->dgram_item_len * 2 bytes |
1027 | * minimal: struct usb_cdc_ncm_ndpX + normal entry + zero entry |
1028 | */ |
1029 | if ((ndp_len < opts->ndp_size + 2 * 2 * (opts->dgram_item_len * 2)) |
1030 | || (ndp_len % opts->ndplen_align != 0)) { |
1031 | INFO(port->func.config->cdev, "Bad NDP length: %x\n", ndp_len); |
1032 | goto err; |
1033 | } |
1034 | tmp += opts->reserved1; |
1035 | tmp += opts->next_fp_index; /* skip reserved (d)wNextFpIndex */ |
1036 | tmp += opts->reserved2; |
1037 | |
1038 | ndp_len -= opts->ndp_size; |
1039 | index2 = get_ncm(&tmp, opts->dgram_item_len); |
1040 | dg_len2 = get_ncm(&tmp, opts->dgram_item_len); |
1041 | dgram_counter = 0; |
1042 | |
1043 | do { |
1044 | index = index2; |
1045 | dg_len = dg_len2; |
1046 | if (dg_len < 14 + crc_len) { /* ethernet header + crc */ |
1047 | INFO(port->func.config->cdev, "Bad dgram length: %x\n", |
1048 | dg_len); |
1049 | goto err; |
1050 | } |
1051 | if (ncm->is_crc) { |
1052 | uint32_t crc, crc2; |
1053 | |
1054 | crc = get_unaligned_le32(skb->data + |
1055 | index + dg_len - crc_len); |
1056 | crc2 = ~crc32_le(~0, |
1057 | skb->data + index, |
1058 | dg_len - crc_len); |
1059 | if (crc != crc2) { |
1060 | INFO(port->func.config->cdev, "Bad CRC\n"); |
1061 | goto err; |
1062 | } |
1063 | } |
1064 | |
1065 | index2 = get_ncm(&tmp, opts->dgram_item_len); |
1066 | dg_len2 = get_ncm(&tmp, opts->dgram_item_len); |
1067 | |
1068 | if (index2 == 0 || dg_len2 == 0) { |
1069 | skb2 = skb; |
1070 | } else { |
1071 | skb2 = skb_clone(skb, GFP_ATOMIC); |
1072 | if (skb2 == NULL) |
1073 | goto err; |
1074 | } |
1075 | |
1076 | if (!skb_pull(skb2, index)) { |
1077 | ret = -EOVERFLOW; |
1078 | goto err; |
1079 | } |
1080 | |
1081 | skb_trim(skb2, dg_len - crc_len); |
1082 | skb_queue_tail(list, skb2); |
1083 | |
1084 | ndp_len -= 2 * (opts->dgram_item_len * 2); |
1085 | |
1086 | dgram_counter++; |
1087 | |
1088 | if (index2 == 0 || dg_len2 == 0) |
1089 | break; |
1090 | } while (ndp_len > 2 * (opts->dgram_item_len * 2)); /* zero entry */ |
1091 | |
1092 | VDBG(port->func.config->cdev, |
1093 | "Parsed NTB with %d frames\n", dgram_counter); |
1094 | return 0; |
1095 | err: |
1096 | skb_queue_purge(list); |
1097 | dev_kfree_skb_any(skb); |
1098 | return ret; |
1099 | } |
1100 | |
1101 | static void ncm_disable(struct usb_function *f) |
1102 | { |
1103 | struct f_ncm *ncm = func_to_ncm(f); |
1104 | struct usb_composite_dev *cdev = f->config->cdev; |
1105 | |
1106 | DBG(cdev, "ncm deactivated\n"); |
1107 | |
1108 | if (ncm->port.in_ep->driver_data) |
1109 | gether_disconnect(&ncm->port); |
1110 | |
1111 | if (ncm->notify->driver_data) { |
1112 | usb_ep_disable(ncm->notify); |
1113 | ncm->notify->driver_data = NULL; |
1114 | ncm->notify_desc = NULL; |
1115 | } |
1116 | } |
1117 | |
1118 | /*-------------------------------------------------------------------------*/ |
1119 | |
1120 | /* |
1121 | * Callbacks let us notify the host about connect/disconnect when the |
1122 | * net device is opened or closed. |
1123 | * |
1124 | * For testing, note that link states on this side include both opened |
1125 | * and closed variants of: |
1126 | * |
1127 | * - disconnected/unconfigured |
1128 | * - configured but inactive (data alt 0) |
1129 | * - configured and active (data alt 1) |
1130 | * |
1131 | * Each needs to be tested with unplug, rmmod, SET_CONFIGURATION, and |
1132 | * SET_INTERFACE (altsetting). Remember also that "configured" doesn't |
1133 | * imply the host is actually polling the notification endpoint, and |
1134 | * likewise that "active" doesn't imply it's actually using the data |
1135 | * endpoints for traffic. |
1136 | */ |
1137 | |
1138 | static void ncm_open(struct gether *geth) |
1139 | { |
1140 | struct f_ncm *ncm = func_to_ncm(&geth->func); |
1141 | |
1142 | DBG(ncm->port.func.config->cdev, "%s\n", __func__); |
1143 | |
1144 | spin_lock(&ncm->lock); |
1145 | ncm->is_open = true; |
1146 | ncm_notify(ncm); |
1147 | spin_unlock(&ncm->lock); |
1148 | } |
1149 | |
1150 | static void ncm_close(struct gether *geth) |
1151 | { |
1152 | struct f_ncm *ncm = func_to_ncm(&geth->func); |
1153 | |
1154 | DBG(ncm->port.func.config->cdev, "%s\n", __func__); |
1155 | |
1156 | spin_lock(&ncm->lock); |
1157 | ncm->is_open = false; |
1158 | ncm_notify(ncm); |
1159 | spin_unlock(&ncm->lock); |
1160 | } |
1161 | |
1162 | /*-------------------------------------------------------------------------*/ |
1163 | |
1164 | /* ethernet function driver setup/binding */ |
1165 | |
1166 | static int __init |
1167 | ncm_bind(struct usb_configuration *c, struct usb_function *f) |
1168 | { |
1169 | struct usb_composite_dev *cdev = c->cdev; |
1170 | struct f_ncm *ncm = func_to_ncm(f); |
1171 | int status; |
1172 | struct usb_ep *ep; |
1173 | |
1174 | /* allocate instance-specific interface IDs */ |
1175 | status = usb_interface_id(c, f); |
1176 | if (status < 0) |
1177 | goto fail; |
1178 | ncm->ctrl_id = status; |
1179 | ncm_iad_desc.bFirstInterface = status; |
1180 | |
1181 | ncm_control_intf.bInterfaceNumber = status; |
1182 | ncm_union_desc.bMasterInterface0 = status; |
1183 | |
1184 | status = usb_interface_id(c, f); |
1185 | if (status < 0) |
1186 | goto fail; |
1187 | ncm->data_id = status; |
1188 | |
1189 | ncm_data_nop_intf.bInterfaceNumber = status; |
1190 | ncm_data_intf.bInterfaceNumber = status; |
1191 | ncm_union_desc.bSlaveInterface0 = status; |
1192 | |
1193 | status = -ENODEV; |
1194 | |
1195 | /* allocate instance-specific endpoints */ |
1196 | ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_in_desc); |
1197 | if (!ep) |
1198 | goto fail; |
1199 | ncm->port.in_ep = ep; |
1200 | ep->driver_data = cdev; /* claim */ |
1201 | |
1202 | ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_out_desc); |
1203 | if (!ep) |
1204 | goto fail; |
1205 | ncm->port.out_ep = ep; |
1206 | ep->driver_data = cdev; /* claim */ |
1207 | |
1208 | ep = usb_ep_autoconfig(cdev->gadget, &fs_ncm_notify_desc); |
1209 | if (!ep) |
1210 | goto fail; |
1211 | ncm->notify = ep; |
1212 | ep->driver_data = cdev; /* claim */ |
1213 | |
1214 | status = -ENOMEM; |
1215 | |
1216 | /* allocate notification request and buffer */ |
1217 | ncm->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL); |
1218 | if (!ncm->notify_req) |
1219 | goto fail; |
1220 | ncm->notify_req->buf = kmalloc(NCM_STATUS_BYTECOUNT, GFP_KERNEL); |
1221 | if (!ncm->notify_req->buf) |
1222 | goto fail; |
1223 | ncm->notify_req->context = ncm; |
1224 | ncm->notify_req->complete = ncm_notify_complete; |
1225 | |
1226 | /* copy descriptors, and track endpoint copies */ |
1227 | f->descriptors = usb_copy_descriptors(ncm_fs_function); |
1228 | if (!f->descriptors) |
1229 | goto fail; |
1230 | |
1231 | ncm->fs.in = usb_find_endpoint(ncm_fs_function, |
1232 | f->descriptors, &fs_ncm_in_desc); |
1233 | ncm->fs.out = usb_find_endpoint(ncm_fs_function, |
1234 | f->descriptors, &fs_ncm_out_desc); |
1235 | ncm->fs.notify = usb_find_endpoint(ncm_fs_function, |
1236 | f->descriptors, &fs_ncm_notify_desc); |
1237 | |
1238 | /* |
1239 | * support all relevant hardware speeds... we expect that when |
1240 | * hardware is dual speed, all bulk-capable endpoints work at |
1241 | * both speeds |
1242 | */ |
1243 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
1244 | hs_ncm_in_desc.bEndpointAddress = |
1245 | fs_ncm_in_desc.bEndpointAddress; |
1246 | hs_ncm_out_desc.bEndpointAddress = |
1247 | fs_ncm_out_desc.bEndpointAddress; |
1248 | hs_ncm_notify_desc.bEndpointAddress = |
1249 | fs_ncm_notify_desc.bEndpointAddress; |
1250 | |
1251 | /* copy descriptors, and track endpoint copies */ |
1252 | f->hs_descriptors = usb_copy_descriptors(ncm_hs_function); |
1253 | if (!f->hs_descriptors) |
1254 | goto fail; |
1255 | |
1256 | ncm->hs.in = usb_find_endpoint(ncm_hs_function, |
1257 | f->hs_descriptors, &hs_ncm_in_desc); |
1258 | ncm->hs.out = usb_find_endpoint(ncm_hs_function, |
1259 | f->hs_descriptors, &hs_ncm_out_desc); |
1260 | ncm->hs.notify = usb_find_endpoint(ncm_hs_function, |
1261 | f->hs_descriptors, &hs_ncm_notify_desc); |
1262 | } |
1263 | |
1264 | /* |
1265 | * NOTE: all that is done without knowing or caring about |
1266 | * the network link ... which is unavailable to this code |
1267 | * until we're activated via set_alt(). |
1268 | */ |
1269 | |
1270 | ncm->port.open = ncm_open; |
1271 | ncm->port.close = ncm_close; |
1272 | |
1273 | DBG(cdev, "CDC Network: %s speed IN/%s OUT/%s NOTIFY/%s\n", |
1274 | gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full", |
1275 | ncm->port.in_ep->name, ncm->port.out_ep->name, |
1276 | ncm->notify->name); |
1277 | return 0; |
1278 | |
1279 | fail: |
1280 | if (f->descriptors) |
1281 | usb_free_descriptors(f->descriptors); |
1282 | |
1283 | if (ncm->notify_req) { |
1284 | kfree(ncm->notify_req->buf); |
1285 | usb_ep_free_request(ncm->notify, ncm->notify_req); |
1286 | } |
1287 | |
1288 | /* we might as well release our claims on endpoints */ |
1289 | if (ncm->notify) |
1290 | ncm->notify->driver_data = NULL; |
1291 | if (ncm->port.out) |
1292 | ncm->port.out_ep->driver_data = NULL; |
1293 | if (ncm->port.in) |
1294 | ncm->port.in_ep->driver_data = NULL; |
1295 | |
1296 | ERROR(cdev, "%s: can't bind, err %d\n", f->name, status); |
1297 | |
1298 | return status; |
1299 | } |
1300 | |
1301 | static void |
1302 | ncm_unbind(struct usb_configuration *c, struct usb_function *f) |
1303 | { |
1304 | struct f_ncm *ncm = func_to_ncm(f); |
1305 | |
1306 | DBG(c->cdev, "ncm unbind\n"); |
1307 | |
1308 | if (gadget_is_dualspeed(c->cdev->gadget)) |
1309 | usb_free_descriptors(f->hs_descriptors); |
1310 | usb_free_descriptors(f->descriptors); |
1311 | |
1312 | kfree(ncm->notify_req->buf); |
1313 | usb_ep_free_request(ncm->notify, ncm->notify_req); |
1314 | |
1315 | ncm_string_defs[1].s = NULL; |
1316 | kfree(ncm); |
1317 | } |
1318 | |
1319 | /** |
1320 | * ncm_bind_config - add CDC Network link to a configuration |
1321 | * @c: the configuration to support the network link |
1322 | * @ethaddr: a buffer in which the ethernet address of the host side |
1323 | * side of the link was recorded |
1324 | * Context: single threaded during gadget setup |
1325 | * |
1326 | * Returns zero on success, else negative errno. |
1327 | * |
1328 | * Caller must have called @gether_setup(). Caller is also responsible |
1329 | * for calling @gether_cleanup() before module unload. |
1330 | */ |
1331 | int __init ncm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]) |
1332 | { |
1333 | struct f_ncm *ncm; |
1334 | int status; |
1335 | |
1336 | if (!can_support_ecm(c->cdev->gadget) || !ethaddr) |
1337 | return -EINVAL; |
1338 | |
1339 | /* maybe allocate device-global string IDs */ |
1340 | if (ncm_string_defs[0].id == 0) { |
1341 | |
1342 | /* control interface label */ |
1343 | status = usb_string_id(c->cdev); |
1344 | if (status < 0) |
1345 | return status; |
1346 | ncm_string_defs[STRING_CTRL_IDX].id = status; |
1347 | ncm_control_intf.iInterface = status; |
1348 | |
1349 | /* data interface label */ |
1350 | status = usb_string_id(c->cdev); |
1351 | if (status < 0) |
1352 | return status; |
1353 | ncm_string_defs[STRING_DATA_IDX].id = status; |
1354 | ncm_data_nop_intf.iInterface = status; |
1355 | ncm_data_intf.iInterface = status; |
1356 | |
1357 | /* MAC address */ |
1358 | status = usb_string_id(c->cdev); |
1359 | if (status < 0) |
1360 | return status; |
1361 | ncm_string_defs[STRING_MAC_IDX].id = status; |
1362 | ecm_desc.iMACAddress = status; |
1363 | |
1364 | /* IAD */ |
1365 | status = usb_string_id(c->cdev); |
1366 | if (status < 0) |
1367 | return status; |
1368 | ncm_string_defs[STRING_IAD_IDX].id = status; |
1369 | ncm_iad_desc.iFunction = status; |
1370 | } |
1371 | |
1372 | /* allocate and initialize one new instance */ |
1373 | ncm = kzalloc(sizeof *ncm, GFP_KERNEL); |
1374 | if (!ncm) |
1375 | return -ENOMEM; |
1376 | |
1377 | /* export host's Ethernet address in CDC format */ |
1378 | snprintf(ncm->ethaddr, sizeof ncm->ethaddr, |
1379 | "%02X%02X%02X%02X%02X%02X", |
1380 | ethaddr[0], ethaddr[1], ethaddr[2], |
1381 | ethaddr[3], ethaddr[4], ethaddr[5]); |
1382 | ncm_string_defs[1].s = ncm->ethaddr; |
1383 | |
1384 | spin_lock_init(&ncm->lock); |
1385 | ncm_reset_values(ncm); |
1386 | ncm->port.is_fixed = true; |
1387 | |
1388 | ncm->port.func.name = "cdc_network"; |
1389 | ncm->port.func.strings = ncm_strings; |
1390 | /* descriptors are per-instance copies */ |
1391 | ncm->port.func.bind = ncm_bind; |
1392 | ncm->port.func.unbind = ncm_unbind; |
1393 | ncm->port.func.set_alt = ncm_set_alt; |
1394 | ncm->port.func.get_alt = ncm_get_alt; |
1395 | ncm->port.func.setup = ncm_setup; |
1396 | ncm->port.func.disable = ncm_disable; |
1397 | |
1398 | ncm->port.wrap = ncm_wrap_ntb; |
1399 | ncm->port.unwrap = ncm_unwrap_ntb; |
1400 | |
1401 | status = usb_add_function(c, &ncm->port.func); |
1402 | if (status) { |
1403 | ncm_string_defs[1].s = NULL; |
1404 | kfree(ncm); |
1405 | } |
1406 | return status; |
1407 | } |
1408 |
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