Commit | Line | Data |
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45fe3b8e DB |
1 | /* |
2 | * f_rndis.c -- RNDIS link function driver | |
3 | * | |
4 | * Copyright (C) 2003-2005,2008 David Brownell | |
5 | * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger | |
6 | * Copyright (C) 2008 Nokia Corporation | |
b97503ff | 7 | * Copyright (C) 2009 Samsung Electronics |
54b8360f | 8 | * Author: Michal Nazarewicz (mina86@mina86.com) |
45fe3b8e DB |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
45fe3b8e DB |
14 | */ |
15 | ||
16 | /* #define VERBOSE_DEBUG */ | |
17 | ||
5a0e3ad6 | 18 | #include <linux/slab.h> |
45fe3b8e | 19 | #include <linux/kernel.h> |
f466c635 | 20 | #include <linux/module.h> |
45fe3b8e DB |
21 | #include <linux/device.h> |
22 | #include <linux/etherdevice.h> | |
23 | ||
60063497 | 24 | #include <linux/atomic.h> |
45fe3b8e DB |
25 | |
26 | #include "u_ether.h" | |
f466c635 | 27 | #include "u_rndis.h" |
45fe3b8e DB |
28 | #include "rndis.h" |
29 | ||
45fe3b8e DB |
30 | /* |
31 | * This function is an RNDIS Ethernet port -- a Microsoft protocol that's | |
32 | * been promoted instead of the standard CDC Ethernet. The published RNDIS | |
33 | * spec is ambiguous, incomplete, and needlessly complex. Variants such as | |
34 | * ActiveSync have even worse status in terms of specification. | |
35 | * | |
36 | * In short: it's a protocol controlled by (and for) Microsoft, not for an | |
37 | * Open ecosystem or markets. Linux supports it *only* because Microsoft | |
38 | * doesn't support the CDC Ethernet standard. | |
39 | * | |
40 | * The RNDIS data transfer model is complex, with multiple Ethernet packets | |
41 | * per USB message, and out of band data. The control model is built around | |
42 | * what's essentially an "RNDIS RPC" protocol. It's all wrapped in a CDC ACM | |
43 | * (modem, not Ethernet) veneer, with those ACM descriptors being entirely | |
44 | * useless (they're ignored). RNDIS expects to be the only function in its | |
45 | * configuration, so it's no real help if you need composite devices; and | |
46 | * it expects to be the first configuration too. | |
47 | * | |
48 | * There is a single technical advantage of RNDIS over CDC Ethernet, if you | |
49 | * discount the fluff that its RPC can be made to deliver: it doesn't need | |
50 | * a NOP altsetting for the data interface. That lets it work on some of the | |
51 | * "so smart it's stupid" hardware which takes over configuration changes | |
52 | * from the software, and adds restrictions like "no altsettings". | |
53 | * | |
54 | * Unfortunately MSFT's RNDIS drivers are buggy. They hang or oops, and | |
55 | * have all sorts of contrary-to-specification oddities that can prevent | |
56 | * them from working sanely. Since bugfixes (or accurate specs, letting | |
57 | * Linux work around those bugs) are unlikely to ever come from MSFT, you | |
58 | * may want to avoid using RNDIS on purely operational grounds. | |
59 | * | |
60 | * Omissions from the RNDIS 1.0 specification include: | |
61 | * | |
62 | * - Power management ... references data that's scattered around lots | |
63 | * of other documentation, which is incorrect/incomplete there too. | |
64 | * | |
65 | * - There are various undocumented protocol requirements, like the need | |
66 | * to send garbage in some control-OUT messages. | |
67 | * | |
68 | * - MS-Windows drivers sometimes emit undocumented requests. | |
69 | */ | |
70 | ||
45fe3b8e DB |
71 | struct f_rndis { |
72 | struct gether port; | |
73 | u8 ctrl_id, data_id; | |
74 | u8 ethaddr[ETH_ALEN]; | |
1fbfeff9 BG |
75 | u32 vendorID; |
76 | const char *manufacturer; | |
45fe3b8e DB |
77 | int config; |
78 | ||
45fe3b8e | 79 | struct usb_ep *notify; |
45fe3b8e DB |
80 | struct usb_request *notify_req; |
81 | atomic_t notify_count; | |
82 | }; | |
83 | ||
84 | static inline struct f_rndis *func_to_rndis(struct usb_function *f) | |
85 | { | |
86 | return container_of(f, struct f_rndis, port.func); | |
87 | } | |
88 | ||
89 | /* peak (theoretical) bulk transfer rate in bits-per-second */ | |
90 | static unsigned int bitrate(struct usb_gadget *g) | |
91 | { | |
04617db7 PZ |
92 | if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER) |
93 | return 13 * 1024 * 8 * 1000 * 8; | |
94 | else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) | |
45fe3b8e DB |
95 | return 13 * 512 * 8 * 1000 * 8; |
96 | else | |
04617db7 | 97 | return 19 * 64 * 1 * 1000 * 8; |
45fe3b8e DB |
98 | } |
99 | ||
100 | /*-------------------------------------------------------------------------*/ | |
101 | ||
102 | /* | |
103 | */ | |
104 | ||
bcb2f99c | 105 | #define RNDIS_STATUS_INTERVAL_MS 32 |
45fe3b8e DB |
106 | #define STATUS_BYTECOUNT 8 /* 8 bytes data */ |
107 | ||
108 | ||
109 | /* interface descriptor: */ | |
110 | ||
28824b18 | 111 | static struct usb_interface_descriptor rndis_control_intf = { |
45fe3b8e DB |
112 | .bLength = sizeof rndis_control_intf, |
113 | .bDescriptorType = USB_DT_INTERFACE, | |
114 | ||
115 | /* .bInterfaceNumber = DYNAMIC */ | |
116 | /* status endpoint is optional; this could be patched later */ | |
117 | .bNumEndpoints = 1, | |
118 | .bInterfaceClass = USB_CLASS_COMM, | |
119 | .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, | |
120 | .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR, | |
121 | /* .iInterface = DYNAMIC */ | |
122 | }; | |
123 | ||
28824b18 | 124 | static struct usb_cdc_header_desc header_desc = { |
45fe3b8e DB |
125 | .bLength = sizeof header_desc, |
126 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
127 | .bDescriptorSubType = USB_CDC_HEADER_TYPE, | |
128 | ||
551509d2 | 129 | .bcdCDC = cpu_to_le16(0x0110), |
45fe3b8e DB |
130 | }; |
131 | ||
28824b18 | 132 | static struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = { |
45fe3b8e DB |
133 | .bLength = sizeof call_mgmt_descriptor, |
134 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
135 | .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE, | |
136 | ||
137 | .bmCapabilities = 0x00, | |
138 | .bDataInterface = 0x01, | |
139 | }; | |
140 | ||
28824b18 | 141 | static struct usb_cdc_acm_descriptor rndis_acm_descriptor = { |
b97503ff | 142 | .bLength = sizeof rndis_acm_descriptor, |
45fe3b8e DB |
143 | .bDescriptorType = USB_DT_CS_INTERFACE, |
144 | .bDescriptorSubType = USB_CDC_ACM_TYPE, | |
145 | ||
146 | .bmCapabilities = 0x00, | |
147 | }; | |
148 | ||
28824b18 | 149 | static struct usb_cdc_union_desc rndis_union_desc = { |
45fe3b8e DB |
150 | .bLength = sizeof(rndis_union_desc), |
151 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
152 | .bDescriptorSubType = USB_CDC_UNION_TYPE, | |
153 | /* .bMasterInterface0 = DYNAMIC */ | |
154 | /* .bSlaveInterface0 = DYNAMIC */ | |
155 | }; | |
156 | ||
157 | /* the data interface has two bulk endpoints */ | |
158 | ||
28824b18 | 159 | static struct usb_interface_descriptor rndis_data_intf = { |
45fe3b8e DB |
160 | .bLength = sizeof rndis_data_intf, |
161 | .bDescriptorType = USB_DT_INTERFACE, | |
162 | ||
163 | /* .bInterfaceNumber = DYNAMIC */ | |
45fe3b8e DB |
164 | .bNumEndpoints = 2, |
165 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
166 | .bInterfaceSubClass = 0, | |
167 | .bInterfaceProtocol = 0, | |
168 | /* .iInterface = DYNAMIC */ | |
169 | }; | |
170 | ||
b97503ff MN |
171 | |
172 | static struct usb_interface_assoc_descriptor | |
173 | rndis_iad_descriptor = { | |
174 | .bLength = sizeof rndis_iad_descriptor, | |
175 | .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, | |
176 | ||
177 | .bFirstInterface = 0, /* XXX, hardcoded */ | |
178 | .bInterfaceCount = 2, // control + data | |
179 | .bFunctionClass = USB_CLASS_COMM, | |
180 | .bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET, | |
181 | .bFunctionProtocol = USB_CDC_PROTO_NONE, | |
182 | /* .iFunction = DYNAMIC */ | |
183 | }; | |
184 | ||
45fe3b8e DB |
185 | /* full speed support: */ |
186 | ||
28824b18 | 187 | static struct usb_endpoint_descriptor fs_notify_desc = { |
45fe3b8e DB |
188 | .bLength = USB_DT_ENDPOINT_SIZE, |
189 | .bDescriptorType = USB_DT_ENDPOINT, | |
190 | ||
191 | .bEndpointAddress = USB_DIR_IN, | |
192 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
551509d2 | 193 | .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), |
bcb2f99c | 194 | .bInterval = RNDIS_STATUS_INTERVAL_MS, |
45fe3b8e DB |
195 | }; |
196 | ||
28824b18 | 197 | static struct usb_endpoint_descriptor fs_in_desc = { |
45fe3b8e DB |
198 | .bLength = USB_DT_ENDPOINT_SIZE, |
199 | .bDescriptorType = USB_DT_ENDPOINT, | |
200 | ||
201 | .bEndpointAddress = USB_DIR_IN, | |
202 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
203 | }; | |
204 | ||
28824b18 | 205 | static struct usb_endpoint_descriptor fs_out_desc = { |
45fe3b8e DB |
206 | .bLength = USB_DT_ENDPOINT_SIZE, |
207 | .bDescriptorType = USB_DT_ENDPOINT, | |
208 | ||
209 | .bEndpointAddress = USB_DIR_OUT, | |
210 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
211 | }; | |
212 | ||
28824b18 | 213 | static struct usb_descriptor_header *eth_fs_function[] = { |
b97503ff | 214 | (struct usb_descriptor_header *) &rndis_iad_descriptor, |
04617db7 | 215 | |
45fe3b8e DB |
216 | /* control interface matches ACM, not Ethernet */ |
217 | (struct usb_descriptor_header *) &rndis_control_intf, | |
218 | (struct usb_descriptor_header *) &header_desc, | |
219 | (struct usb_descriptor_header *) &call_mgmt_descriptor, | |
b97503ff | 220 | (struct usb_descriptor_header *) &rndis_acm_descriptor, |
45fe3b8e DB |
221 | (struct usb_descriptor_header *) &rndis_union_desc, |
222 | (struct usb_descriptor_header *) &fs_notify_desc, | |
04617db7 | 223 | |
45fe3b8e DB |
224 | /* data interface has no altsetting */ |
225 | (struct usb_descriptor_header *) &rndis_data_intf, | |
226 | (struct usb_descriptor_header *) &fs_in_desc, | |
227 | (struct usb_descriptor_header *) &fs_out_desc, | |
228 | NULL, | |
229 | }; | |
230 | ||
231 | /* high speed support: */ | |
232 | ||
28824b18 | 233 | static struct usb_endpoint_descriptor hs_notify_desc = { |
45fe3b8e DB |
234 | .bLength = USB_DT_ENDPOINT_SIZE, |
235 | .bDescriptorType = USB_DT_ENDPOINT, | |
236 | ||
237 | .bEndpointAddress = USB_DIR_IN, | |
238 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
551509d2 | 239 | .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), |
bcb2f99c | 240 | .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS) |
45fe3b8e | 241 | }; |
04617db7 | 242 | |
28824b18 | 243 | static struct usb_endpoint_descriptor hs_in_desc = { |
45fe3b8e DB |
244 | .bLength = USB_DT_ENDPOINT_SIZE, |
245 | .bDescriptorType = USB_DT_ENDPOINT, | |
246 | ||
247 | .bEndpointAddress = USB_DIR_IN, | |
248 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 249 | .wMaxPacketSize = cpu_to_le16(512), |
45fe3b8e DB |
250 | }; |
251 | ||
28824b18 | 252 | static struct usb_endpoint_descriptor hs_out_desc = { |
45fe3b8e DB |
253 | .bLength = USB_DT_ENDPOINT_SIZE, |
254 | .bDescriptorType = USB_DT_ENDPOINT, | |
255 | ||
256 | .bEndpointAddress = USB_DIR_OUT, | |
257 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 258 | .wMaxPacketSize = cpu_to_le16(512), |
45fe3b8e DB |
259 | }; |
260 | ||
28824b18 | 261 | static struct usb_descriptor_header *eth_hs_function[] = { |
b97503ff | 262 | (struct usb_descriptor_header *) &rndis_iad_descriptor, |
04617db7 | 263 | |
45fe3b8e DB |
264 | /* control interface matches ACM, not Ethernet */ |
265 | (struct usb_descriptor_header *) &rndis_control_intf, | |
266 | (struct usb_descriptor_header *) &header_desc, | |
267 | (struct usb_descriptor_header *) &call_mgmt_descriptor, | |
b97503ff | 268 | (struct usb_descriptor_header *) &rndis_acm_descriptor, |
45fe3b8e DB |
269 | (struct usb_descriptor_header *) &rndis_union_desc, |
270 | (struct usb_descriptor_header *) &hs_notify_desc, | |
04617db7 | 271 | |
45fe3b8e DB |
272 | /* data interface has no altsetting */ |
273 | (struct usb_descriptor_header *) &rndis_data_intf, | |
274 | (struct usb_descriptor_header *) &hs_in_desc, | |
275 | (struct usb_descriptor_header *) &hs_out_desc, | |
276 | NULL, | |
277 | }; | |
278 | ||
04617db7 PZ |
279 | /* super speed support: */ |
280 | ||
281 | static struct usb_endpoint_descriptor ss_notify_desc = { | |
282 | .bLength = USB_DT_ENDPOINT_SIZE, | |
283 | .bDescriptorType = USB_DT_ENDPOINT, | |
284 | ||
285 | .bEndpointAddress = USB_DIR_IN, | |
286 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
287 | .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), | |
bcb2f99c | 288 | .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS) |
04617db7 PZ |
289 | }; |
290 | ||
291 | static struct usb_ss_ep_comp_descriptor ss_intr_comp_desc = { | |
292 | .bLength = sizeof ss_intr_comp_desc, | |
293 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
294 | ||
295 | /* the following 3 values can be tweaked if necessary */ | |
296 | /* .bMaxBurst = 0, */ | |
297 | /* .bmAttributes = 0, */ | |
298 | .wBytesPerInterval = cpu_to_le16(STATUS_BYTECOUNT), | |
299 | }; | |
300 | ||
301 | static struct usb_endpoint_descriptor ss_in_desc = { | |
302 | .bLength = USB_DT_ENDPOINT_SIZE, | |
303 | .bDescriptorType = USB_DT_ENDPOINT, | |
304 | ||
305 | .bEndpointAddress = USB_DIR_IN, | |
306 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
307 | .wMaxPacketSize = cpu_to_le16(1024), | |
308 | }; | |
309 | ||
310 | static struct usb_endpoint_descriptor ss_out_desc = { | |
311 | .bLength = USB_DT_ENDPOINT_SIZE, | |
312 | .bDescriptorType = USB_DT_ENDPOINT, | |
313 | ||
314 | .bEndpointAddress = USB_DIR_OUT, | |
315 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
316 | .wMaxPacketSize = cpu_to_le16(1024), | |
317 | }; | |
318 | ||
319 | static struct usb_ss_ep_comp_descriptor ss_bulk_comp_desc = { | |
320 | .bLength = sizeof ss_bulk_comp_desc, | |
321 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
322 | ||
323 | /* the following 2 values can be tweaked if necessary */ | |
324 | /* .bMaxBurst = 0, */ | |
325 | /* .bmAttributes = 0, */ | |
326 | }; | |
327 | ||
328 | static struct usb_descriptor_header *eth_ss_function[] = { | |
329 | (struct usb_descriptor_header *) &rndis_iad_descriptor, | |
330 | ||
331 | /* control interface matches ACM, not Ethernet */ | |
332 | (struct usb_descriptor_header *) &rndis_control_intf, | |
333 | (struct usb_descriptor_header *) &header_desc, | |
334 | (struct usb_descriptor_header *) &call_mgmt_descriptor, | |
335 | (struct usb_descriptor_header *) &rndis_acm_descriptor, | |
336 | (struct usb_descriptor_header *) &rndis_union_desc, | |
337 | (struct usb_descriptor_header *) &ss_notify_desc, | |
338 | (struct usb_descriptor_header *) &ss_intr_comp_desc, | |
339 | ||
340 | /* data interface has no altsetting */ | |
341 | (struct usb_descriptor_header *) &rndis_data_intf, | |
342 | (struct usb_descriptor_header *) &ss_in_desc, | |
343 | (struct usb_descriptor_header *) &ss_bulk_comp_desc, | |
344 | (struct usb_descriptor_header *) &ss_out_desc, | |
345 | (struct usb_descriptor_header *) &ss_bulk_comp_desc, | |
346 | NULL, | |
347 | }; | |
348 | ||
45fe3b8e DB |
349 | /* string descriptors: */ |
350 | ||
351 | static struct usb_string rndis_string_defs[] = { | |
352 | [0].s = "RNDIS Communications Control", | |
353 | [1].s = "RNDIS Ethernet Data", | |
b97503ff | 354 | [2].s = "RNDIS", |
45fe3b8e DB |
355 | { } /* end of list */ |
356 | }; | |
357 | ||
358 | static struct usb_gadget_strings rndis_string_table = { | |
359 | .language = 0x0409, /* en-us */ | |
360 | .strings = rndis_string_defs, | |
361 | }; | |
362 | ||
363 | static struct usb_gadget_strings *rndis_strings[] = { | |
364 | &rndis_string_table, | |
365 | NULL, | |
366 | }; | |
367 | ||
368 | /*-------------------------------------------------------------------------*/ | |
369 | ||
9b39e9dd BN |
370 | static struct sk_buff *rndis_add_header(struct gether *port, |
371 | struct sk_buff *skb) | |
45fe3b8e | 372 | { |
9b39e9dd BN |
373 | struct sk_buff *skb2; |
374 | ||
375 | skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type)); | |
376 | if (skb2) | |
377 | rndis_add_hdr(skb2); | |
378 | ||
379 | dev_kfree_skb_any(skb); | |
380 | return skb2; | |
45fe3b8e DB |
381 | } |
382 | ||
383 | static void rndis_response_available(void *_rndis) | |
384 | { | |
385 | struct f_rndis *rndis = _rndis; | |
386 | struct usb_request *req = rndis->notify_req; | |
387 | struct usb_composite_dev *cdev = rndis->port.func.config->cdev; | |
388 | __le32 *data = req->buf; | |
389 | int status; | |
390 | ||
ff349505 | 391 | if (atomic_inc_return(&rndis->notify_count) != 1) |
45fe3b8e DB |
392 | return; |
393 | ||
394 | /* Send RNDIS RESPONSE_AVAILABLE notification; a | |
395 | * USB_CDC_NOTIFY_RESPONSE_AVAILABLE "should" work too | |
396 | * | |
397 | * This is the only notification defined by RNDIS. | |
398 | */ | |
399 | data[0] = cpu_to_le32(1); | |
400 | data[1] = cpu_to_le32(0); | |
401 | ||
402 | status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC); | |
403 | if (status) { | |
404 | atomic_dec(&rndis->notify_count); | |
405 | DBG(cdev, "notify/0 --> %d\n", status); | |
406 | } | |
407 | } | |
408 | ||
409 | static void rndis_response_complete(struct usb_ep *ep, struct usb_request *req) | |
410 | { | |
411 | struct f_rndis *rndis = req->context; | |
412 | struct usb_composite_dev *cdev = rndis->port.func.config->cdev; | |
413 | int status = req->status; | |
414 | ||
415 | /* after TX: | |
416 | * - USB_CDC_GET_ENCAPSULATED_RESPONSE (ep0/control) | |
417 | * - RNDIS_RESPONSE_AVAILABLE (status/irq) | |
418 | */ | |
419 | switch (status) { | |
420 | case -ECONNRESET: | |
421 | case -ESHUTDOWN: | |
422 | /* connection gone */ | |
423 | atomic_set(&rndis->notify_count, 0); | |
424 | break; | |
425 | default: | |
426 | DBG(cdev, "RNDIS %s response error %d, %d/%d\n", | |
427 | ep->name, status, | |
428 | req->actual, req->length); | |
429 | /* FALLTHROUGH */ | |
430 | case 0: | |
431 | if (ep != rndis->notify) | |
432 | break; | |
433 | ||
434 | /* handle multiple pending RNDIS_RESPONSE_AVAILABLE | |
435 | * notifications by resending until we're done | |
436 | */ | |
437 | if (atomic_dec_and_test(&rndis->notify_count)) | |
438 | break; | |
439 | status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC); | |
440 | if (status) { | |
441 | atomic_dec(&rndis->notify_count); | |
442 | DBG(cdev, "notify/1 --> %d\n", status); | |
443 | } | |
444 | break; | |
445 | } | |
446 | } | |
447 | ||
448 | static void rndis_command_complete(struct usb_ep *ep, struct usb_request *req) | |
449 | { | |
450 | struct f_rndis *rndis = req->context; | |
45fe3b8e DB |
451 | int status; |
452 | ||
453 | /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */ | |
454 | // spin_lock(&dev->lock); | |
455 | status = rndis_msg_parser(rndis->config, (u8 *) req->buf); | |
456 | if (status < 0) | |
967baed4 | 457 | pr_err("RNDIS command error %d, %d/%d\n", |
45fe3b8e DB |
458 | status, req->actual, req->length); |
459 | // spin_unlock(&dev->lock); | |
460 | } | |
461 | ||
462 | static int | |
463 | rndis_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) | |
464 | { | |
465 | struct f_rndis *rndis = func_to_rndis(f); | |
466 | struct usb_composite_dev *cdev = f->config->cdev; | |
467 | struct usb_request *req = cdev->req; | |
468 | int value = -EOPNOTSUPP; | |
469 | u16 w_index = le16_to_cpu(ctrl->wIndex); | |
470 | u16 w_value = le16_to_cpu(ctrl->wValue); | |
471 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
472 | ||
473 | /* composite driver infrastructure handles everything except | |
474 | * CDC class messages; interface activation uses set_alt(). | |
475 | */ | |
476 | switch ((ctrl->bRequestType << 8) | ctrl->bRequest) { | |
477 | ||
478 | /* RNDIS uses the CDC command encapsulation mechanism to implement | |
479 | * an RPC scheme, with much getting/setting of attributes by OID. | |
480 | */ | |
481 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
482 | | USB_CDC_SEND_ENCAPSULATED_COMMAND: | |
472b9127 | 483 | if (w_value || w_index != rndis->ctrl_id) |
45fe3b8e DB |
484 | goto invalid; |
485 | /* read the request; process it later */ | |
486 | value = w_length; | |
487 | req->complete = rndis_command_complete; | |
488 | req->context = rndis; | |
489 | /* later, rndis_response_available() sends a notification */ | |
490 | break; | |
491 | ||
492 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8) | |
493 | | USB_CDC_GET_ENCAPSULATED_RESPONSE: | |
494 | if (w_value || w_index != rndis->ctrl_id) | |
495 | goto invalid; | |
496 | else { | |
497 | u8 *buf; | |
498 | u32 n; | |
499 | ||
500 | /* return the result */ | |
501 | buf = rndis_get_next_response(rndis->config, &n); | |
502 | if (buf) { | |
503 | memcpy(req->buf, buf, n); | |
504 | req->complete = rndis_response_complete; | |
f1356172 | 505 | req->context = rndis; |
45fe3b8e DB |
506 | rndis_free_response(rndis->config, buf); |
507 | value = n; | |
508 | } | |
509 | /* else stalls ... spec says to avoid that */ | |
510 | } | |
511 | break; | |
512 | ||
513 | default: | |
514 | invalid: | |
515 | VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", | |
516 | ctrl->bRequestType, ctrl->bRequest, | |
517 | w_value, w_index, w_length); | |
518 | } | |
519 | ||
520 | /* respond with data transfer or status phase? */ | |
521 | if (value >= 0) { | |
522 | DBG(cdev, "rndis req%02x.%02x v%04x i%04x l%d\n", | |
523 | ctrl->bRequestType, ctrl->bRequest, | |
524 | w_value, w_index, w_length); | |
090b9011 | 525 | req->zero = (value < w_length); |
45fe3b8e DB |
526 | req->length = value; |
527 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); | |
528 | if (value < 0) | |
529 | ERROR(cdev, "rndis response on err %d\n", value); | |
530 | } | |
531 | ||
532 | /* device either stalls (value < 0) or reports success */ | |
533 | return value; | |
534 | } | |
535 | ||
536 | ||
537 | static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
538 | { | |
539 | struct f_rndis *rndis = func_to_rndis(f); | |
540 | struct usb_composite_dev *cdev = f->config->cdev; | |
541 | ||
542 | /* we know alt == 0 */ | |
543 | ||
544 | if (intf == rndis->ctrl_id) { | |
545 | if (rndis->notify->driver_data) { | |
546 | VDBG(cdev, "reset rndis control %d\n", intf); | |
547 | usb_ep_disable(rndis->notify); | |
ea2a1df7 TB |
548 | } |
549 | if (!rndis->notify->desc) { | |
45fe3b8e | 550 | VDBG(cdev, "init rndis ctrl %d\n", intf); |
ea2a1df7 TB |
551 | if (config_ep_by_speed(cdev->gadget, f, rndis->notify)) |
552 | goto fail; | |
45fe3b8e | 553 | } |
72c973dd | 554 | usb_ep_enable(rndis->notify); |
45fe3b8e DB |
555 | rndis->notify->driver_data = rndis; |
556 | ||
557 | } else if (intf == rndis->data_id) { | |
558 | struct net_device *net; | |
559 | ||
560 | if (rndis->port.in_ep->driver_data) { | |
561 | DBG(cdev, "reset rndis\n"); | |
562 | gether_disconnect(&rndis->port); | |
830d1b18 MM |
563 | } |
564 | ||
ea2a1df7 | 565 | if (!rndis->port.in_ep->desc || !rndis->port.out_ep->desc) { |
45fe3b8e | 566 | DBG(cdev, "init rndis\n"); |
ea2a1df7 TB |
567 | if (config_ep_by_speed(cdev->gadget, f, |
568 | rndis->port.in_ep) || | |
569 | config_ep_by_speed(cdev->gadget, f, | |
570 | rndis->port.out_ep)) { | |
571 | rndis->port.in_ep->desc = NULL; | |
572 | rndis->port.out_ep->desc = NULL; | |
573 | goto fail; | |
574 | } | |
45fe3b8e DB |
575 | } |
576 | ||
577 | /* Avoid ZLPs; they can be troublesome. */ | |
578 | rndis->port.is_zlp_ok = false; | |
579 | ||
580 | /* RNDIS should be in the "RNDIS uninitialized" state, | |
581 | * either never activated or after rndis_uninit(). | |
582 | * | |
583 | * We don't want data to flow here until a nonzero packet | |
584 | * filter is set, at which point it enters "RNDIS data | |
585 | * initialized" state ... but we do want the endpoints | |
586 | * to be activated. It's a strange little state. | |
587 | * | |
588 | * REVISIT the RNDIS gadget code has done this wrong for a | |
589 | * very long time. We need another call to the link layer | |
590 | * code -- gether_updown(...bool) maybe -- to do it right. | |
591 | */ | |
592 | rndis->port.cdc_filter = 0; | |
593 | ||
594 | DBG(cdev, "RNDIS RX/TX early activation ... \n"); | |
595 | net = gether_connect(&rndis->port); | |
596 | if (IS_ERR(net)) | |
597 | return PTR_ERR(net); | |
598 | ||
599 | rndis_set_param_dev(rndis->config, net, | |
600 | &rndis->port.cdc_filter); | |
601 | } else | |
602 | goto fail; | |
603 | ||
604 | return 0; | |
605 | fail: | |
606 | return -EINVAL; | |
607 | } | |
608 | ||
609 | static void rndis_disable(struct usb_function *f) | |
610 | { | |
611 | struct f_rndis *rndis = func_to_rndis(f); | |
612 | struct usb_composite_dev *cdev = f->config->cdev; | |
613 | ||
614 | if (!rndis->notify->driver_data) | |
615 | return; | |
616 | ||
617 | DBG(cdev, "rndis deactivated\n"); | |
618 | ||
619 | rndis_uninit(rndis->config); | |
620 | gether_disconnect(&rndis->port); | |
621 | ||
622 | usb_ep_disable(rndis->notify); | |
623 | rndis->notify->driver_data = NULL; | |
624 | } | |
625 | ||
626 | /*-------------------------------------------------------------------------*/ | |
627 | ||
628 | /* | |
629 | * This isn't quite the same mechanism as CDC Ethernet, since the | |
630 | * notification scheme passes less data, but the same set of link | |
631 | * states must be tested. A key difference is that altsettings are | |
632 | * not used to tell whether the link should send packets or not. | |
633 | */ | |
634 | ||
635 | static void rndis_open(struct gether *geth) | |
636 | { | |
637 | struct f_rndis *rndis = func_to_rndis(&geth->func); | |
638 | struct usb_composite_dev *cdev = geth->func.config->cdev; | |
639 | ||
640 | DBG(cdev, "%s\n", __func__); | |
641 | ||
17c51b6c | 642 | rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, |
45fe3b8e DB |
643 | bitrate(cdev->gadget) / 100); |
644 | rndis_signal_connect(rndis->config); | |
645 | } | |
646 | ||
647 | static void rndis_close(struct gether *geth) | |
648 | { | |
649 | struct f_rndis *rndis = func_to_rndis(&geth->func); | |
650 | ||
651 | DBG(geth->func.config->cdev, "%s\n", __func__); | |
652 | ||
17c51b6c | 653 | rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0); |
45fe3b8e DB |
654 | rndis_signal_disconnect(rndis->config); |
655 | } | |
656 | ||
657 | /*-------------------------------------------------------------------------*/ | |
658 | ||
f466c635 AP |
659 | /* Some controllers can't support RNDIS ... */ |
660 | static inline bool can_support_rndis(struct usb_configuration *c) | |
661 | { | |
662 | /* everything else is *presumably* fine */ | |
663 | return true; | |
664 | } | |
665 | ||
45fe3b8e DB |
666 | /* ethernet function driver setup/binding */ |
667 | ||
28824b18 | 668 | static int |
45fe3b8e DB |
669 | rndis_bind(struct usb_configuration *c, struct usb_function *f) |
670 | { | |
671 | struct usb_composite_dev *cdev = c->cdev; | |
672 | struct f_rndis *rndis = func_to_rndis(f); | |
4e75e727 | 673 | struct usb_string *us; |
45fe3b8e DB |
674 | int status; |
675 | struct usb_ep *ep; | |
676 | ||
f466c635 AP |
677 | #ifndef USB_FRNDIS_INCLUDED |
678 | struct f_rndis_opts *rndis_opts; | |
679 | ||
680 | if (!can_support_rndis(c)) | |
681 | return -EINVAL; | |
682 | ||
683 | rndis_opts = container_of(f->fi, struct f_rndis_opts, func_inst); | |
684 | ||
685 | /* | |
686 | * in drivers/usb/gadget/configfs.c:configfs_composite_bind() | |
687 | * configurations are bound in sequence with list_for_each_entry, | |
688 | * in each configuration its functions are bound in sequence | |
689 | * with list_for_each_entry, so we assume no race condition | |
690 | * with regard to rndis_opts->bound access | |
691 | */ | |
692 | if (!rndis_opts->bound) { | |
693 | gether_set_gadget(rndis_opts->net, cdev->gadget); | |
694 | status = gether_register_netdev(rndis_opts->net); | |
695 | if (status) | |
696 | return status; | |
697 | rndis_opts->bound = true; | |
698 | } | |
699 | #endif | |
4e75e727 AP |
700 | us = usb_gstrings_attach(cdev, rndis_strings, |
701 | ARRAY_SIZE(rndis_string_defs)); | |
702 | if (IS_ERR(us)) | |
703 | return PTR_ERR(us); | |
704 | rndis_control_intf.iInterface = us[0].id; | |
705 | rndis_data_intf.iInterface = us[1].id; | |
706 | rndis_iad_descriptor.iFunction = us[2].id; | |
f466c635 | 707 | |
45fe3b8e DB |
708 | /* allocate instance-specific interface IDs */ |
709 | status = usb_interface_id(c, f); | |
710 | if (status < 0) | |
711 | goto fail; | |
712 | rndis->ctrl_id = status; | |
b97503ff | 713 | rndis_iad_descriptor.bFirstInterface = status; |
45fe3b8e DB |
714 | |
715 | rndis_control_intf.bInterfaceNumber = status; | |
716 | rndis_union_desc.bMasterInterface0 = status; | |
717 | ||
718 | status = usb_interface_id(c, f); | |
719 | if (status < 0) | |
720 | goto fail; | |
721 | rndis->data_id = status; | |
722 | ||
723 | rndis_data_intf.bInterfaceNumber = status; | |
724 | rndis_union_desc.bSlaveInterface0 = status; | |
725 | ||
726 | status = -ENODEV; | |
727 | ||
728 | /* allocate instance-specific endpoints */ | |
729 | ep = usb_ep_autoconfig(cdev->gadget, &fs_in_desc); | |
730 | if (!ep) | |
731 | goto fail; | |
732 | rndis->port.in_ep = ep; | |
733 | ep->driver_data = cdev; /* claim */ | |
734 | ||
735 | ep = usb_ep_autoconfig(cdev->gadget, &fs_out_desc); | |
736 | if (!ep) | |
737 | goto fail; | |
738 | rndis->port.out_ep = ep; | |
739 | ep->driver_data = cdev; /* claim */ | |
740 | ||
741 | /* NOTE: a status/notification endpoint is, strictly speaking, | |
742 | * optional. We don't treat it that way though! It's simpler, | |
743 | * and some newer profiles don't treat it as optional. | |
744 | */ | |
745 | ep = usb_ep_autoconfig(cdev->gadget, &fs_notify_desc); | |
746 | if (!ep) | |
747 | goto fail; | |
748 | rndis->notify = ep; | |
749 | ep->driver_data = cdev; /* claim */ | |
750 | ||
751 | status = -ENOMEM; | |
752 | ||
753 | /* allocate notification request and buffer */ | |
754 | rndis->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL); | |
755 | if (!rndis->notify_req) | |
756 | goto fail; | |
757 | rndis->notify_req->buf = kmalloc(STATUS_BYTECOUNT, GFP_KERNEL); | |
758 | if (!rndis->notify_req->buf) | |
759 | goto fail; | |
760 | rndis->notify_req->length = STATUS_BYTECOUNT; | |
761 | rndis->notify_req->context = rndis; | |
762 | rndis->notify_req->complete = rndis_response_complete; | |
763 | ||
45fe3b8e DB |
764 | /* support all relevant hardware speeds... we expect that when |
765 | * hardware is dual speed, all bulk-capable endpoints work at | |
766 | * both speeds | |
767 | */ | |
10287bae SAS |
768 | hs_in_desc.bEndpointAddress = fs_in_desc.bEndpointAddress; |
769 | hs_out_desc.bEndpointAddress = fs_out_desc.bEndpointAddress; | |
770 | hs_notify_desc.bEndpointAddress = fs_notify_desc.bEndpointAddress; | |
45fe3b8e | 771 | |
10287bae SAS |
772 | ss_in_desc.bEndpointAddress = fs_in_desc.bEndpointAddress; |
773 | ss_out_desc.bEndpointAddress = fs_out_desc.bEndpointAddress; | |
774 | ss_notify_desc.bEndpointAddress = fs_notify_desc.bEndpointAddress; | |
775 | ||
776 | status = usb_assign_descriptors(f, eth_fs_function, eth_hs_function, | |
777 | eth_ss_function); | |
778 | if (status) | |
779 | goto fail; | |
04617db7 | 780 | |
45fe3b8e DB |
781 | rndis->port.open = rndis_open; |
782 | rndis->port.close = rndis_close; | |
783 | ||
f466c635 | 784 | #ifdef USB_FRNDIS_INCLUDED |
45fe3b8e DB |
785 | status = rndis_register(rndis_response_available, rndis); |
786 | if (status < 0) | |
787 | goto fail; | |
788 | rndis->config = status; | |
f466c635 | 789 | #endif |
45fe3b8e | 790 | |
17c51b6c | 791 | rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0); |
45fe3b8e DB |
792 | rndis_set_host_mac(rndis->config, rndis->ethaddr); |
793 | ||
1fbfeff9 BG |
794 | if (rndis->manufacturer && rndis->vendorID && |
795 | rndis_set_param_vendor(rndis->config, rndis->vendorID, | |
796 | rndis->manufacturer)) | |
797 | goto fail; | |
45fe3b8e DB |
798 | |
799 | /* NOTE: all that is done without knowing or caring about | |
800 | * the network link ... which is unavailable to this code | |
801 | * until we're activated via set_alt(). | |
802 | */ | |
803 | ||
804 | DBG(cdev, "RNDIS: %s speed IN/%s OUT/%s NOTIFY/%s\n", | |
04617db7 | 805 | gadget_is_superspeed(c->cdev->gadget) ? "super" : |
45fe3b8e DB |
806 | gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full", |
807 | rndis->port.in_ep->name, rndis->port.out_ep->name, | |
808 | rndis->notify->name); | |
809 | return 0; | |
810 | ||
811 | fail: | |
10287bae | 812 | usb_free_all_descriptors(f); |
45fe3b8e DB |
813 | |
814 | if (rndis->notify_req) { | |
815 | kfree(rndis->notify_req->buf); | |
816 | usb_ep_free_request(rndis->notify, rndis->notify_req); | |
817 | } | |
818 | ||
819 | /* we might as well release our claims on endpoints */ | |
820 | if (rndis->notify) | |
821 | rndis->notify->driver_data = NULL; | |
e79cc615 | 822 | if (rndis->port.out_ep) |
45fe3b8e | 823 | rndis->port.out_ep->driver_data = NULL; |
e79cc615 | 824 | if (rndis->port.in_ep) |
45fe3b8e DB |
825 | rndis->port.in_ep->driver_data = NULL; |
826 | ||
827 | ERROR(cdev, "%s: can't bind, err %d\n", f->name, status); | |
828 | ||
829 | return status; | |
830 | } | |
831 | ||
f466c635 AP |
832 | #ifdef USB_FRNDIS_INCLUDED |
833 | ||
45fe3b8e | 834 | static void |
f466c635 | 835 | rndis_old_unbind(struct usb_configuration *c, struct usb_function *f) |
45fe3b8e DB |
836 | { |
837 | struct f_rndis *rndis = func_to_rndis(f); | |
838 | ||
839 | rndis_deregister(rndis->config); | |
45fe3b8e | 840 | |
10287bae | 841 | usb_free_all_descriptors(f); |
45fe3b8e DB |
842 | |
843 | kfree(rndis->notify_req->buf); | |
844 | usb_ep_free_request(rndis->notify, rndis->notify_req); | |
845 | ||
846 | kfree(rndis); | |
847 | } | |
848 | ||
28824b18 | 849 | int |
1fbfeff9 | 850 | rndis_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN], |
d6a01439 | 851 | u32 vendorID, const char *manufacturer, struct eth_dev *dev) |
45fe3b8e DB |
852 | { |
853 | struct f_rndis *rndis; | |
854 | int status; | |
855 | ||
45fe3b8e DB |
856 | /* allocate and initialize one new instance */ |
857 | status = -ENOMEM; | |
858 | rndis = kzalloc(sizeof *rndis, GFP_KERNEL); | |
859 | if (!rndis) | |
860 | goto fail; | |
861 | ||
862 | memcpy(rndis->ethaddr, ethaddr, ETH_ALEN); | |
1fbfeff9 BG |
863 | rndis->vendorID = vendorID; |
864 | rndis->manufacturer = manufacturer; | |
45fe3b8e | 865 | |
d6a01439 | 866 | rndis->port.ioport = dev; |
45fe3b8e DB |
867 | /* RNDIS activates when the host changes this filter */ |
868 | rndis->port.cdc_filter = 0; | |
869 | ||
870 | /* RNDIS has special (and complex) framing */ | |
871 | rndis->port.header_len = sizeof(struct rndis_packet_msg_type); | |
872 | rndis->port.wrap = rndis_add_header; | |
873 | rndis->port.unwrap = rndis_rm_hdr; | |
874 | ||
875 | rndis->port.func.name = "rndis"; | |
45fe3b8e DB |
876 | /* descriptors are per-instance copies */ |
877 | rndis->port.func.bind = rndis_bind; | |
f466c635 | 878 | rndis->port.func.unbind = rndis_old_unbind; |
45fe3b8e DB |
879 | rndis->port.func.set_alt = rndis_set_alt; |
880 | rndis->port.func.setup = rndis_setup; | |
881 | rndis->port.func.disable = rndis_disable; | |
882 | ||
883 | status = usb_add_function(c, &rndis->port.func); | |
76da66d1 | 884 | if (status) |
45fe3b8e DB |
885 | kfree(rndis); |
886 | fail: | |
45fe3b8e DB |
887 | return status; |
888 | } | |
f466c635 AP |
889 | |
890 | #else | |
891 | ||
892 | void rndis_borrow_net(struct usb_function_instance *f, struct net_device *net) | |
893 | { | |
894 | struct f_rndis_opts *opts; | |
895 | ||
896 | opts = container_of(f, struct f_rndis_opts, func_inst); | |
897 | if (opts->bound) | |
898 | gether_cleanup(netdev_priv(opts->net)); | |
899 | else | |
900 | free_netdev(opts->net); | |
901 | opts->borrowed_net = opts->bound = true; | |
902 | opts->net = net; | |
903 | } | |
904 | EXPORT_SYMBOL(rndis_borrow_net); | |
905 | ||
906 | static void rndis_free_inst(struct usb_function_instance *f) | |
907 | { | |
908 | struct f_rndis_opts *opts; | |
909 | ||
910 | opts = container_of(f, struct f_rndis_opts, func_inst); | |
911 | if (!opts->borrowed_net) { | |
912 | if (opts->bound) | |
913 | gether_cleanup(netdev_priv(opts->net)); | |
914 | else | |
915 | free_netdev(opts->net); | |
916 | } | |
917 | kfree(opts); | |
918 | } | |
919 | ||
920 | static struct usb_function_instance *rndis_alloc_inst(void) | |
921 | { | |
922 | struct f_rndis_opts *opts; | |
923 | ||
924 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
925 | if (!opts) | |
926 | return ERR_PTR(-ENOMEM); | |
927 | ||
928 | opts->func_inst.free_func_inst = rndis_free_inst; | |
929 | opts->net = gether_setup_default(); | |
930 | if (IS_ERR(opts->net)) | |
931 | return ERR_CAST(opts->net); | |
932 | ||
933 | return &opts->func_inst; | |
934 | } | |
935 | ||
936 | static void rndis_free(struct usb_function *f) | |
937 | { | |
938 | struct f_rndis *rndis; | |
939 | ||
940 | rndis = func_to_rndis(f); | |
941 | rndis_deregister(rndis->config); | |
942 | kfree(rndis); | |
943 | } | |
944 | ||
945 | static void rndis_unbind(struct usb_configuration *c, struct usb_function *f) | |
946 | { | |
947 | struct f_rndis *rndis = func_to_rndis(f); | |
948 | ||
f466c635 AP |
949 | usb_free_all_descriptors(f); |
950 | ||
951 | kfree(rndis->notify_req->buf); | |
952 | usb_ep_free_request(rndis->notify, rndis->notify_req); | |
953 | } | |
954 | ||
955 | static struct usb_function *rndis_alloc(struct usb_function_instance *fi) | |
956 | { | |
957 | struct f_rndis *rndis; | |
958 | struct f_rndis_opts *opts; | |
959 | int status; | |
960 | ||
961 | /* allocate and initialize one new instance */ | |
962 | rndis = kzalloc(sizeof(*rndis), GFP_KERNEL); | |
76da66d1 | 963 | if (!rndis) |
f466c635 | 964 | return ERR_PTR(-ENOMEM); |
f466c635 AP |
965 | |
966 | opts = container_of(fi, struct f_rndis_opts, func_inst); | |
967 | ||
968 | gether_get_host_addr_u8(opts->net, rndis->ethaddr); | |
969 | rndis->vendorID = opts->vendor_id; | |
970 | rndis->manufacturer = opts->manufacturer; | |
971 | ||
972 | rndis->port.ioport = netdev_priv(opts->net); | |
973 | /* RNDIS activates when the host changes this filter */ | |
974 | rndis->port.cdc_filter = 0; | |
975 | ||
976 | /* RNDIS has special (and complex) framing */ | |
977 | rndis->port.header_len = sizeof(struct rndis_packet_msg_type); | |
978 | rndis->port.wrap = rndis_add_header; | |
979 | rndis->port.unwrap = rndis_rm_hdr; | |
980 | ||
981 | rndis->port.func.name = "rndis"; | |
f466c635 AP |
982 | /* descriptors are per-instance copies */ |
983 | rndis->port.func.bind = rndis_bind; | |
984 | rndis->port.func.unbind = rndis_unbind; | |
985 | rndis->port.func.set_alt = rndis_set_alt; | |
986 | rndis->port.func.setup = rndis_setup; | |
987 | rndis->port.func.disable = rndis_disable; | |
988 | rndis->port.func.free_func = rndis_free; | |
989 | ||
990 | status = rndis_register(rndis_response_available, rndis); | |
991 | if (status < 0) { | |
992 | kfree(rndis); | |
993 | return ERR_PTR(status); | |
994 | } | |
995 | rndis->config = status; | |
996 | ||
997 | return &rndis->port.func; | |
998 | } | |
999 | ||
1000 | DECLARE_USB_FUNCTION_INIT(rndis, rndis_alloc_inst, rndis_alloc); | |
1001 | MODULE_LICENSE("GPL"); | |
1002 | MODULE_AUTHOR("David Brownell"); | |
1003 | ||
1004 | #endif |