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9732d523 RDC |
1 | /* |
2 | * f_phonet.c -- USB CDC Phonet function | |
3 | * | |
4 | * Copyright (C) 2007-2008 Nokia Corporation. All rights reserved. | |
5 | * | |
6 | * Author: Rémi Denis-Courmont | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/device.h> | |
25 | ||
26 | #include <linux/netdevice.h> | |
27 | #include <linux/if_ether.h> | |
28 | #include <linux/if_phonet.h> | |
29 | #include <linux/if_arp.h> | |
30 | ||
31 | #include <linux/usb/ch9.h> | |
32 | #include <linux/usb/cdc.h> | |
33 | #include <linux/usb/composite.h> | |
34 | ||
35 | #include "u_phonet.h" | |
36 | ||
37 | #define PN_MEDIA_USB 0x1B | |
38 | ||
39 | /*-------------------------------------------------------------------------*/ | |
40 | ||
41 | struct phonet_port { | |
42 | struct f_phonet *usb; | |
43 | spinlock_t lock; | |
44 | }; | |
45 | ||
46 | struct f_phonet { | |
47 | struct usb_function function; | |
48 | struct net_device *dev; | |
49 | struct usb_ep *in_ep, *out_ep; | |
50 | ||
51 | struct usb_request *in_req; | |
52 | struct usb_request *out_reqv[0]; | |
53 | }; | |
54 | ||
55 | static int phonet_rxq_size = 2; | |
56 | ||
57 | static inline struct f_phonet *func_to_pn(struct usb_function *f) | |
58 | { | |
59 | return container_of(f, struct f_phonet, function); | |
60 | } | |
61 | ||
62 | /*-------------------------------------------------------------------------*/ | |
63 | ||
64 | #define USB_CDC_SUBCLASS_PHONET 0xfe | |
65 | #define USB_CDC_PHONET_TYPE 0xab | |
66 | ||
67 | static struct usb_interface_descriptor | |
68 | pn_control_intf_desc = { | |
69 | .bLength = sizeof pn_control_intf_desc, | |
70 | .bDescriptorType = USB_DT_INTERFACE, | |
71 | ||
72 | /* .bInterfaceNumber = DYNAMIC, */ | |
73 | .bInterfaceClass = USB_CLASS_COMM, | |
74 | .bInterfaceSubClass = USB_CDC_SUBCLASS_PHONET, | |
75 | }; | |
76 | ||
77 | static const struct usb_cdc_header_desc | |
78 | pn_header_desc = { | |
79 | .bLength = sizeof pn_header_desc, | |
80 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
81 | .bDescriptorSubType = USB_CDC_HEADER_TYPE, | |
551509d2 | 82 | .bcdCDC = cpu_to_le16(0x0110), |
9732d523 RDC |
83 | }; |
84 | ||
85 | static const struct usb_cdc_header_desc | |
86 | pn_phonet_desc = { | |
87 | .bLength = sizeof pn_phonet_desc, | |
88 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
89 | .bDescriptorSubType = USB_CDC_PHONET_TYPE, | |
551509d2 | 90 | .bcdCDC = cpu_to_le16(0x1505), /* ??? */ |
9732d523 RDC |
91 | }; |
92 | ||
93 | static struct usb_cdc_union_desc | |
94 | pn_union_desc = { | |
95 | .bLength = sizeof pn_union_desc, | |
96 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
97 | .bDescriptorSubType = USB_CDC_UNION_TYPE, | |
98 | ||
99 | /* .bMasterInterface0 = DYNAMIC, */ | |
100 | /* .bSlaveInterface0 = DYNAMIC, */ | |
101 | }; | |
102 | ||
103 | static struct usb_interface_descriptor | |
104 | pn_data_nop_intf_desc = { | |
105 | .bLength = sizeof pn_data_nop_intf_desc, | |
106 | .bDescriptorType = USB_DT_INTERFACE, | |
107 | ||
108 | /* .bInterfaceNumber = DYNAMIC, */ | |
109 | .bAlternateSetting = 0, | |
110 | .bNumEndpoints = 0, | |
111 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
112 | }; | |
113 | ||
114 | static struct usb_interface_descriptor | |
115 | pn_data_intf_desc = { | |
116 | .bLength = sizeof pn_data_intf_desc, | |
117 | .bDescriptorType = USB_DT_INTERFACE, | |
118 | ||
119 | /* .bInterfaceNumber = DYNAMIC, */ | |
120 | .bAlternateSetting = 1, | |
121 | .bNumEndpoints = 2, | |
122 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
123 | }; | |
124 | ||
125 | static struct usb_endpoint_descriptor | |
126 | pn_fs_sink_desc = { | |
127 | .bLength = USB_DT_ENDPOINT_SIZE, | |
128 | .bDescriptorType = USB_DT_ENDPOINT, | |
129 | ||
130 | .bEndpointAddress = USB_DIR_OUT, | |
131 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
132 | }; | |
133 | ||
134 | static struct usb_endpoint_descriptor | |
135 | pn_hs_sink_desc = { | |
136 | .bLength = USB_DT_ENDPOINT_SIZE, | |
137 | .bDescriptorType = USB_DT_ENDPOINT, | |
138 | ||
139 | .bEndpointAddress = USB_DIR_OUT, | |
140 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 141 | .wMaxPacketSize = cpu_to_le16(512), |
9732d523 RDC |
142 | }; |
143 | ||
144 | static struct usb_endpoint_descriptor | |
145 | pn_fs_source_desc = { | |
146 | .bLength = USB_DT_ENDPOINT_SIZE, | |
147 | .bDescriptorType = USB_DT_ENDPOINT, | |
148 | ||
149 | .bEndpointAddress = USB_DIR_IN, | |
150 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
151 | }; | |
152 | ||
153 | static struct usb_endpoint_descriptor | |
154 | pn_hs_source_desc = { | |
155 | .bLength = USB_DT_ENDPOINT_SIZE, | |
156 | .bDescriptorType = USB_DT_ENDPOINT, | |
157 | ||
158 | .bEndpointAddress = USB_DIR_IN, | |
159 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 160 | .wMaxPacketSize = cpu_to_le16(512), |
9732d523 RDC |
161 | }; |
162 | ||
163 | static struct usb_descriptor_header *fs_pn_function[] = { | |
164 | (struct usb_descriptor_header *) &pn_control_intf_desc, | |
165 | (struct usb_descriptor_header *) &pn_header_desc, | |
166 | (struct usb_descriptor_header *) &pn_phonet_desc, | |
167 | (struct usb_descriptor_header *) &pn_union_desc, | |
168 | (struct usb_descriptor_header *) &pn_data_nop_intf_desc, | |
169 | (struct usb_descriptor_header *) &pn_data_intf_desc, | |
170 | (struct usb_descriptor_header *) &pn_fs_sink_desc, | |
171 | (struct usb_descriptor_header *) &pn_fs_source_desc, | |
172 | NULL, | |
173 | }; | |
174 | ||
175 | static struct usb_descriptor_header *hs_pn_function[] = { | |
176 | (struct usb_descriptor_header *) &pn_control_intf_desc, | |
177 | (struct usb_descriptor_header *) &pn_header_desc, | |
178 | (struct usb_descriptor_header *) &pn_phonet_desc, | |
179 | (struct usb_descriptor_header *) &pn_union_desc, | |
180 | (struct usb_descriptor_header *) &pn_data_nop_intf_desc, | |
181 | (struct usb_descriptor_header *) &pn_data_intf_desc, | |
182 | (struct usb_descriptor_header *) &pn_hs_sink_desc, | |
183 | (struct usb_descriptor_header *) &pn_hs_source_desc, | |
184 | NULL, | |
185 | }; | |
186 | ||
187 | /*-------------------------------------------------------------------------*/ | |
188 | ||
189 | static int pn_net_open(struct net_device *dev) | |
190 | { | |
191 | if (netif_carrier_ok(dev)) | |
192 | netif_wake_queue(dev); | |
193 | return 0; | |
194 | } | |
195 | ||
196 | static int pn_net_close(struct net_device *dev) | |
197 | { | |
198 | netif_stop_queue(dev); | |
199 | return 0; | |
200 | } | |
201 | ||
202 | static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req) | |
203 | { | |
204 | struct f_phonet *fp = ep->driver_data; | |
205 | struct net_device *dev = fp->dev; | |
206 | struct sk_buff *skb = req->context; | |
207 | ||
208 | switch (req->status) { | |
209 | case 0: | |
210 | dev->stats.tx_packets++; | |
211 | dev->stats.tx_bytes += skb->len; | |
212 | break; | |
213 | ||
214 | case -ESHUTDOWN: /* disconnected */ | |
215 | case -ECONNRESET: /* disabled */ | |
216 | dev->stats.tx_aborted_errors++; | |
217 | default: | |
218 | dev->stats.tx_errors++; | |
219 | } | |
220 | ||
221 | dev_kfree_skb_any(skb); | |
222 | if (netif_carrier_ok(dev)) | |
223 | netif_wake_queue(dev); | |
224 | } | |
225 | ||
226 | static int pn_net_xmit(struct sk_buff *skb, struct net_device *dev) | |
227 | { | |
228 | struct phonet_port *port = netdev_priv(dev); | |
229 | struct f_phonet *fp; | |
230 | struct usb_request *req; | |
231 | unsigned long flags; | |
232 | ||
233 | if (skb->protocol != htons(ETH_P_PHONET)) | |
234 | goto out; | |
235 | ||
236 | spin_lock_irqsave(&port->lock, flags); | |
237 | fp = port->usb; | |
238 | if (unlikely(!fp)) /* race with carrier loss */ | |
239 | goto out_unlock; | |
240 | ||
241 | req = fp->in_req; | |
242 | req->buf = skb->data; | |
243 | req->length = skb->len; | |
244 | req->complete = pn_tx_complete; | |
245 | req->zero = 1; | |
246 | req->context = skb; | |
247 | ||
248 | if (unlikely(usb_ep_queue(fp->in_ep, req, GFP_ATOMIC))) | |
249 | goto out_unlock; | |
250 | ||
251 | netif_stop_queue(dev); | |
252 | skb = NULL; | |
253 | ||
254 | out_unlock: | |
255 | spin_unlock_irqrestore(&port->lock, flags); | |
256 | out: | |
257 | if (unlikely(skb)) { | |
258 | dev_kfree_skb_any(skb); | |
259 | dev->stats.tx_dropped++; | |
260 | } | |
261 | return 0; | |
262 | } | |
263 | ||
264 | static int pn_net_mtu(struct net_device *dev, int new_mtu) | |
265 | { | |
266 | struct phonet_port *port = netdev_priv(dev); | |
267 | unsigned long flags; | |
268 | int err = -EBUSY; | |
269 | ||
270 | if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU)) | |
271 | return -EINVAL; | |
272 | ||
273 | spin_lock_irqsave(&port->lock, flags); | |
274 | if (!netif_carrier_ok(dev)) { | |
275 | dev->mtu = new_mtu; | |
276 | err = 0; | |
277 | } | |
278 | spin_unlock_irqrestore(&port->lock, flags); | |
279 | return err; | |
280 | } | |
281 | ||
ab638e69 SH |
282 | static const struct net_device_ops pn_netdev_ops = { |
283 | .ndo_open = pn_net_open, | |
284 | .ndo_stop = pn_net_close, | |
285 | .ndo_start_xmit = pn_net_xmit, | |
286 | .ndo_change_mtu = pn_net_mtu, | |
287 | }; | |
288 | ||
9732d523 RDC |
289 | static void pn_net_setup(struct net_device *dev) |
290 | { | |
291 | dev->features = 0; | |
292 | dev->type = ARPHRD_PHONET; | |
293 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
294 | dev->mtu = PHONET_DEV_MTU; | |
295 | dev->hard_header_len = 1; | |
296 | dev->dev_addr[0] = PN_MEDIA_USB; | |
297 | dev->addr_len = 1; | |
298 | dev->tx_queue_len = 1; | |
299 | ||
ab638e69 | 300 | dev->netdev_ops = &pn_netdev_ops; |
9732d523 RDC |
301 | dev->destructor = free_netdev; |
302 | dev->header_ops = &phonet_header_ops; | |
9732d523 RDC |
303 | } |
304 | ||
305 | /*-------------------------------------------------------------------------*/ | |
306 | ||
307 | /* | |
308 | * Queue buffer for data from the host | |
309 | */ | |
310 | static int | |
311 | pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags) | |
312 | { | |
313 | struct sk_buff *skb; | |
314 | const size_t size = fp->dev->mtu; | |
315 | int err; | |
316 | ||
317 | skb = alloc_skb(size, gfp_flags); | |
318 | if (!skb) | |
319 | return -ENOMEM; | |
320 | ||
321 | req->buf = skb->data; | |
322 | req->length = size; | |
323 | req->context = skb; | |
324 | ||
325 | err = usb_ep_queue(fp->out_ep, req, gfp_flags); | |
326 | if (unlikely(err)) | |
327 | dev_kfree_skb_any(skb); | |
328 | return err; | |
329 | } | |
330 | ||
331 | static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req) | |
332 | { | |
333 | struct f_phonet *fp = ep->driver_data; | |
334 | struct net_device *dev = fp->dev; | |
335 | struct sk_buff *skb = req->context; | |
336 | int status = req->status; | |
337 | ||
338 | switch (status) { | |
339 | case 0: | |
340 | if (unlikely(!netif_running(dev))) | |
341 | break; | |
342 | if (unlikely(req->actual < 1)) | |
343 | break; | |
344 | skb_put(skb, req->actual); | |
345 | skb->protocol = htons(ETH_P_PHONET); | |
346 | skb_reset_mac_header(skb); | |
347 | __skb_pull(skb, 1); | |
348 | skb->dev = dev; | |
349 | dev->stats.rx_packets++; | |
350 | dev->stats.rx_bytes += skb->len; | |
351 | ||
352 | netif_rx(skb); | |
353 | skb = NULL; | |
354 | break; | |
355 | ||
356 | /* Do not resubmit in these cases: */ | |
357 | case -ESHUTDOWN: /* disconnect */ | |
358 | case -ECONNABORTED: /* hw reset */ | |
359 | case -ECONNRESET: /* dequeued (unlink or netif down) */ | |
360 | req = NULL; | |
361 | break; | |
362 | ||
363 | /* Do resubmit in these cases: */ | |
364 | case -EOVERFLOW: /* request buffer overflow */ | |
365 | dev->stats.rx_over_errors++; | |
366 | default: | |
367 | dev->stats.rx_errors++; | |
368 | break; | |
369 | } | |
370 | ||
371 | if (skb) | |
372 | dev_kfree_skb_any(skb); | |
373 | if (req) | |
374 | pn_rx_submit(fp, req, GFP_ATOMIC); | |
375 | } | |
376 | ||
377 | /*-------------------------------------------------------------------------*/ | |
378 | ||
379 | static void __pn_reset(struct usb_function *f) | |
380 | { | |
381 | struct f_phonet *fp = func_to_pn(f); | |
382 | struct net_device *dev = fp->dev; | |
383 | struct phonet_port *port = netdev_priv(dev); | |
384 | ||
385 | netif_carrier_off(dev); | |
386 | netif_stop_queue(dev); | |
387 | port->usb = NULL; | |
388 | ||
389 | usb_ep_disable(fp->out_ep); | |
390 | usb_ep_disable(fp->in_ep); | |
391 | } | |
392 | ||
393 | static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
394 | { | |
395 | struct f_phonet *fp = func_to_pn(f); | |
396 | struct usb_gadget *gadget = fp->function.config->cdev->gadget; | |
397 | ||
398 | if (intf == pn_control_intf_desc.bInterfaceNumber) | |
399 | /* control interface, no altsetting */ | |
400 | return (alt > 0) ? -EINVAL : 0; | |
401 | ||
402 | if (intf == pn_data_intf_desc.bInterfaceNumber) { | |
403 | struct net_device *dev = fp->dev; | |
404 | struct phonet_port *port = netdev_priv(dev); | |
405 | ||
406 | /* data intf (0: inactive, 1: active) */ | |
407 | if (alt > 1) | |
408 | return -EINVAL; | |
409 | ||
410 | spin_lock(&port->lock); | |
411 | __pn_reset(f); | |
412 | if (alt == 1) { | |
413 | struct usb_endpoint_descriptor *out, *in; | |
414 | int i; | |
415 | ||
416 | out = ep_choose(gadget, | |
417 | &pn_hs_sink_desc, | |
418 | &pn_fs_sink_desc); | |
419 | in = ep_choose(gadget, | |
420 | &pn_hs_source_desc, | |
421 | &pn_fs_source_desc); | |
422 | usb_ep_enable(fp->out_ep, out); | |
423 | usb_ep_enable(fp->in_ep, in); | |
424 | ||
425 | port->usb = fp; | |
426 | fp->out_ep->driver_data = fp; | |
427 | fp->in_ep->driver_data = fp; | |
428 | ||
429 | netif_carrier_on(dev); | |
430 | if (netif_running(dev)) | |
431 | netif_wake_queue(dev); | |
432 | for (i = 0; i < phonet_rxq_size; i++) | |
433 | pn_rx_submit(fp, fp->out_reqv[i], GFP_ATOMIC); | |
434 | } | |
435 | spin_unlock(&port->lock); | |
436 | return 0; | |
437 | } | |
438 | ||
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | static int pn_get_alt(struct usb_function *f, unsigned intf) | |
443 | { | |
444 | struct f_phonet *fp = func_to_pn(f); | |
445 | ||
446 | if (intf == pn_control_intf_desc.bInterfaceNumber) | |
447 | return 0; | |
448 | ||
449 | if (intf == pn_data_intf_desc.bInterfaceNumber) { | |
450 | struct phonet_port *port = netdev_priv(fp->dev); | |
451 | u8 alt; | |
452 | ||
453 | spin_lock(&port->lock); | |
454 | alt = port->usb != NULL; | |
455 | spin_unlock(&port->lock); | |
456 | return alt; | |
457 | } | |
458 | ||
459 | return -EINVAL; | |
460 | } | |
461 | ||
462 | static void pn_disconnect(struct usb_function *f) | |
463 | { | |
464 | struct f_phonet *fp = func_to_pn(f); | |
465 | struct phonet_port *port = netdev_priv(fp->dev); | |
466 | unsigned long flags; | |
467 | ||
468 | /* remain disabled until set_alt */ | |
469 | spin_lock_irqsave(&port->lock, flags); | |
470 | __pn_reset(f); | |
471 | spin_unlock_irqrestore(&port->lock, flags); | |
472 | } | |
473 | ||
474 | /*-------------------------------------------------------------------------*/ | |
475 | ||
476 | static __init | |
477 | int pn_bind(struct usb_configuration *c, struct usb_function *f) | |
478 | { | |
479 | struct usb_composite_dev *cdev = c->cdev; | |
480 | struct usb_gadget *gadget = cdev->gadget; | |
481 | struct f_phonet *fp = func_to_pn(f); | |
482 | struct usb_ep *ep; | |
483 | int status, i; | |
484 | ||
485 | /* Reserve interface IDs */ | |
486 | status = usb_interface_id(c, f); | |
487 | if (status < 0) | |
488 | goto err; | |
489 | pn_control_intf_desc.bInterfaceNumber = status; | |
490 | pn_union_desc.bMasterInterface0 = status; | |
491 | ||
492 | status = usb_interface_id(c, f); | |
493 | if (status < 0) | |
494 | goto err; | |
495 | pn_data_nop_intf_desc.bInterfaceNumber = status; | |
496 | pn_data_intf_desc.bInterfaceNumber = status; | |
497 | pn_union_desc.bSlaveInterface0 = status; | |
498 | ||
499 | /* Reserve endpoints */ | |
500 | status = -ENODEV; | |
501 | ep = usb_ep_autoconfig(gadget, &pn_fs_sink_desc); | |
502 | if (!ep) | |
503 | goto err; | |
504 | fp->out_ep = ep; | |
505 | ep->driver_data = fp; /* Claim */ | |
506 | ||
507 | ep = usb_ep_autoconfig(gadget, &pn_fs_source_desc); | |
508 | if (!ep) | |
509 | goto err; | |
510 | fp->in_ep = ep; | |
511 | ep->driver_data = fp; /* Claim */ | |
512 | ||
513 | pn_hs_sink_desc.bEndpointAddress = | |
514 | pn_fs_sink_desc.bEndpointAddress; | |
515 | pn_hs_source_desc.bEndpointAddress = | |
516 | pn_fs_source_desc.bEndpointAddress; | |
517 | ||
518 | /* Do not try to bind Phonet twice... */ | |
519 | fp->function.descriptors = fs_pn_function; | |
520 | fp->function.hs_descriptors = hs_pn_function; | |
521 | ||
522 | /* Incoming USB requests */ | |
523 | status = -ENOMEM; | |
524 | for (i = 0; i < phonet_rxq_size; i++) { | |
525 | struct usb_request *req; | |
526 | ||
527 | req = usb_ep_alloc_request(fp->out_ep, GFP_KERNEL); | |
528 | if (!req) | |
529 | goto err; | |
530 | ||
531 | req->complete = pn_rx_complete; | |
532 | fp->out_reqv[i] = req; | |
533 | } | |
534 | ||
535 | /* Outgoing USB requests */ | |
536 | fp->in_req = usb_ep_alloc_request(fp->in_ep, GFP_KERNEL); | |
537 | if (!fp->in_req) | |
538 | goto err; | |
539 | ||
540 | INFO(cdev, "USB CDC Phonet function\n"); | |
541 | INFO(cdev, "using %s, OUT %s, IN %s\n", cdev->gadget->name, | |
542 | fp->out_ep->name, fp->in_ep->name); | |
543 | return 0; | |
544 | ||
545 | err: | |
546 | if (fp->out_ep) | |
547 | fp->out_ep->driver_data = NULL; | |
548 | if (fp->in_ep) | |
549 | fp->in_ep->driver_data = NULL; | |
550 | ERROR(cdev, "USB CDC Phonet: cannot autoconfigure\n"); | |
551 | return status; | |
552 | } | |
553 | ||
554 | static void | |
555 | pn_unbind(struct usb_configuration *c, struct usb_function *f) | |
556 | { | |
557 | struct f_phonet *fp = func_to_pn(f); | |
558 | int i; | |
559 | ||
560 | /* We are already disconnected */ | |
561 | if (fp->in_req) | |
562 | usb_ep_free_request(fp->in_ep, fp->in_req); | |
563 | for (i = 0; i < phonet_rxq_size; i++) | |
564 | if (fp->out_reqv[i]) | |
565 | usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); | |
566 | ||
567 | kfree(fp); | |
568 | } | |
569 | ||
570 | /*-------------------------------------------------------------------------*/ | |
571 | ||
572 | static struct net_device *dev; | |
573 | ||
574 | int __init phonet_bind_config(struct usb_configuration *c) | |
575 | { | |
576 | struct f_phonet *fp; | |
577 | int err; | |
578 | ||
579 | fp = kzalloc(sizeof(*fp), GFP_KERNEL); | |
580 | if (!fp) | |
581 | return -ENOMEM; | |
582 | ||
583 | fp->dev = dev; | |
584 | fp->function.name = "phonet"; | |
585 | fp->function.bind = pn_bind; | |
586 | fp->function.unbind = pn_unbind; | |
587 | fp->function.set_alt = pn_set_alt; | |
588 | fp->function.get_alt = pn_get_alt; | |
589 | fp->function.disable = pn_disconnect; | |
590 | ||
591 | err = usb_add_function(c, &fp->function); | |
592 | if (err) | |
593 | kfree(fp); | |
594 | return err; | |
595 | } | |
596 | ||
597 | int __init gphonet_setup(struct usb_gadget *gadget) | |
598 | { | |
599 | struct phonet_port *port; | |
600 | int err; | |
601 | ||
602 | /* Create net device */ | |
603 | BUG_ON(dev); | |
604 | dev = alloc_netdev(sizeof(*port) | |
605 | + (phonet_rxq_size * sizeof(struct usb_request *)), | |
606 | "upnlink%d", pn_net_setup); | |
607 | if (!dev) | |
608 | return -ENOMEM; | |
609 | ||
610 | port = netdev_priv(dev); | |
611 | spin_lock_init(&port->lock); | |
612 | netif_carrier_off(dev); | |
613 | netif_stop_queue(dev); | |
614 | SET_NETDEV_DEV(dev, &gadget->dev); | |
615 | ||
616 | err = register_netdev(dev); | |
617 | if (err) | |
618 | free_netdev(dev); | |
619 | return err; | |
620 | } | |
621 | ||
622 | void gphonet_cleanup(void) | |
623 | { | |
624 | unregister_netdev(dev); | |
625 | } |