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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 | ||
5a0e3ad6 | 23 | #include <linux/slab.h> |
9732d523 RDC |
24 | #include <linux/kernel.h> |
25 | #include <linux/device.h> | |
26 | ||
27 | #include <linux/netdevice.h> | |
28 | #include <linux/if_ether.h> | |
29 | #include <linux/if_phonet.h> | |
30 | #include <linux/if_arp.h> | |
31 | ||
32 | #include <linux/usb/ch9.h> | |
33 | #include <linux/usb/cdc.h> | |
34 | #include <linux/usb/composite.h> | |
35 | ||
36 | #include "u_phonet.h" | |
37 | ||
38 | #define PN_MEDIA_USB 0x1B | |
b91cd144 RDC |
39 | #define MAXPACKET 512 |
40 | #if (PAGE_SIZE % MAXPACKET) | |
41 | #error MAXPACKET must divide PAGE_SIZE! | |
42 | #endif | |
9732d523 RDC |
43 | |
44 | /*-------------------------------------------------------------------------*/ | |
45 | ||
46 | struct phonet_port { | |
47 | struct f_phonet *usb; | |
48 | spinlock_t lock; | |
49 | }; | |
50 | ||
51 | struct f_phonet { | |
52 | struct usb_function function; | |
b91cd144 RDC |
53 | struct { |
54 | struct sk_buff *skb; | |
55 | spinlock_t lock; | |
56 | } rx; | |
9732d523 RDC |
57 | struct net_device *dev; |
58 | struct usb_ep *in_ep, *out_ep; | |
59 | ||
60 | struct usb_request *in_req; | |
61 | struct usb_request *out_reqv[0]; | |
62 | }; | |
63 | ||
b91cd144 | 64 | static int phonet_rxq_size = 17; |
9732d523 RDC |
65 | |
66 | static inline struct f_phonet *func_to_pn(struct usb_function *f) | |
67 | { | |
68 | return container_of(f, struct f_phonet, function); | |
69 | } | |
70 | ||
71 | /*-------------------------------------------------------------------------*/ | |
72 | ||
73 | #define USB_CDC_SUBCLASS_PHONET 0xfe | |
74 | #define USB_CDC_PHONET_TYPE 0xab | |
75 | ||
76 | static struct usb_interface_descriptor | |
77 | pn_control_intf_desc = { | |
78 | .bLength = sizeof pn_control_intf_desc, | |
79 | .bDescriptorType = USB_DT_INTERFACE, | |
80 | ||
81 | /* .bInterfaceNumber = DYNAMIC, */ | |
82 | .bInterfaceClass = USB_CLASS_COMM, | |
83 | .bInterfaceSubClass = USB_CDC_SUBCLASS_PHONET, | |
84 | }; | |
85 | ||
86 | static const struct usb_cdc_header_desc | |
87 | pn_header_desc = { | |
88 | .bLength = sizeof pn_header_desc, | |
89 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
90 | .bDescriptorSubType = USB_CDC_HEADER_TYPE, | |
551509d2 | 91 | .bcdCDC = cpu_to_le16(0x0110), |
9732d523 RDC |
92 | }; |
93 | ||
94 | static const struct usb_cdc_header_desc | |
95 | pn_phonet_desc = { | |
96 | .bLength = sizeof pn_phonet_desc, | |
97 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
98 | .bDescriptorSubType = USB_CDC_PHONET_TYPE, | |
551509d2 | 99 | .bcdCDC = cpu_to_le16(0x1505), /* ??? */ |
9732d523 RDC |
100 | }; |
101 | ||
102 | static struct usb_cdc_union_desc | |
103 | pn_union_desc = { | |
104 | .bLength = sizeof pn_union_desc, | |
105 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
106 | .bDescriptorSubType = USB_CDC_UNION_TYPE, | |
107 | ||
108 | /* .bMasterInterface0 = DYNAMIC, */ | |
109 | /* .bSlaveInterface0 = DYNAMIC, */ | |
110 | }; | |
111 | ||
112 | static struct usb_interface_descriptor | |
113 | pn_data_nop_intf_desc = { | |
114 | .bLength = sizeof pn_data_nop_intf_desc, | |
115 | .bDescriptorType = USB_DT_INTERFACE, | |
116 | ||
117 | /* .bInterfaceNumber = DYNAMIC, */ | |
118 | .bAlternateSetting = 0, | |
119 | .bNumEndpoints = 0, | |
120 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
121 | }; | |
122 | ||
123 | static struct usb_interface_descriptor | |
124 | pn_data_intf_desc = { | |
125 | .bLength = sizeof pn_data_intf_desc, | |
126 | .bDescriptorType = USB_DT_INTERFACE, | |
127 | ||
128 | /* .bInterfaceNumber = DYNAMIC, */ | |
129 | .bAlternateSetting = 1, | |
130 | .bNumEndpoints = 2, | |
131 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
132 | }; | |
133 | ||
134 | static struct usb_endpoint_descriptor | |
135 | pn_fs_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, | |
141 | }; | |
142 | ||
143 | static struct usb_endpoint_descriptor | |
144 | pn_hs_sink_desc = { | |
145 | .bLength = USB_DT_ENDPOINT_SIZE, | |
146 | .bDescriptorType = USB_DT_ENDPOINT, | |
147 | ||
148 | .bEndpointAddress = USB_DIR_OUT, | |
149 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
b91cd144 | 150 | .wMaxPacketSize = cpu_to_le16(MAXPACKET), |
9732d523 RDC |
151 | }; |
152 | ||
153 | static struct usb_endpoint_descriptor | |
154 | pn_fs_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, | |
160 | }; | |
161 | ||
162 | static struct usb_endpoint_descriptor | |
163 | pn_hs_source_desc = { | |
164 | .bLength = USB_DT_ENDPOINT_SIZE, | |
165 | .bDescriptorType = USB_DT_ENDPOINT, | |
166 | ||
167 | .bEndpointAddress = USB_DIR_IN, | |
168 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 169 | .wMaxPacketSize = cpu_to_le16(512), |
9732d523 RDC |
170 | }; |
171 | ||
172 | static struct usb_descriptor_header *fs_pn_function[] = { | |
173 | (struct usb_descriptor_header *) &pn_control_intf_desc, | |
174 | (struct usb_descriptor_header *) &pn_header_desc, | |
175 | (struct usb_descriptor_header *) &pn_phonet_desc, | |
176 | (struct usb_descriptor_header *) &pn_union_desc, | |
177 | (struct usb_descriptor_header *) &pn_data_nop_intf_desc, | |
178 | (struct usb_descriptor_header *) &pn_data_intf_desc, | |
179 | (struct usb_descriptor_header *) &pn_fs_sink_desc, | |
180 | (struct usb_descriptor_header *) &pn_fs_source_desc, | |
181 | NULL, | |
182 | }; | |
183 | ||
184 | static struct usb_descriptor_header *hs_pn_function[] = { | |
185 | (struct usb_descriptor_header *) &pn_control_intf_desc, | |
186 | (struct usb_descriptor_header *) &pn_header_desc, | |
187 | (struct usb_descriptor_header *) &pn_phonet_desc, | |
188 | (struct usb_descriptor_header *) &pn_union_desc, | |
189 | (struct usb_descriptor_header *) &pn_data_nop_intf_desc, | |
190 | (struct usb_descriptor_header *) &pn_data_intf_desc, | |
191 | (struct usb_descriptor_header *) &pn_hs_sink_desc, | |
192 | (struct usb_descriptor_header *) &pn_hs_source_desc, | |
193 | NULL, | |
194 | }; | |
195 | ||
196 | /*-------------------------------------------------------------------------*/ | |
197 | ||
198 | static int pn_net_open(struct net_device *dev) | |
199 | { | |
c69367fd | 200 | netif_wake_queue(dev); |
9732d523 RDC |
201 | return 0; |
202 | } | |
203 | ||
204 | static int pn_net_close(struct net_device *dev) | |
205 | { | |
206 | netif_stop_queue(dev); | |
207 | return 0; | |
208 | } | |
209 | ||
210 | static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req) | |
211 | { | |
212 | struct f_phonet *fp = ep->driver_data; | |
213 | struct net_device *dev = fp->dev; | |
214 | struct sk_buff *skb = req->context; | |
215 | ||
216 | switch (req->status) { | |
217 | case 0: | |
218 | dev->stats.tx_packets++; | |
219 | dev->stats.tx_bytes += skb->len; | |
220 | break; | |
221 | ||
222 | case -ESHUTDOWN: /* disconnected */ | |
223 | case -ECONNRESET: /* disabled */ | |
224 | dev->stats.tx_aborted_errors++; | |
225 | default: | |
226 | dev->stats.tx_errors++; | |
227 | } | |
228 | ||
229 | dev_kfree_skb_any(skb); | |
c69367fd | 230 | netif_wake_queue(dev); |
9732d523 RDC |
231 | } |
232 | ||
233 | static int pn_net_xmit(struct sk_buff *skb, struct net_device *dev) | |
234 | { | |
235 | struct phonet_port *port = netdev_priv(dev); | |
236 | struct f_phonet *fp; | |
237 | struct usb_request *req; | |
238 | unsigned long flags; | |
239 | ||
240 | if (skb->protocol != htons(ETH_P_PHONET)) | |
241 | goto out; | |
242 | ||
243 | spin_lock_irqsave(&port->lock, flags); | |
244 | fp = port->usb; | |
245 | if (unlikely(!fp)) /* race with carrier loss */ | |
246 | goto out_unlock; | |
247 | ||
248 | req = fp->in_req; | |
249 | req->buf = skb->data; | |
250 | req->length = skb->len; | |
251 | req->complete = pn_tx_complete; | |
252 | req->zero = 1; | |
253 | req->context = skb; | |
254 | ||
255 | if (unlikely(usb_ep_queue(fp->in_ep, req, GFP_ATOMIC))) | |
256 | goto out_unlock; | |
257 | ||
258 | netif_stop_queue(dev); | |
259 | skb = NULL; | |
260 | ||
261 | out_unlock: | |
262 | spin_unlock_irqrestore(&port->lock, flags); | |
263 | out: | |
264 | if (unlikely(skb)) { | |
fa202592 | 265 | dev_kfree_skb(skb); |
9732d523 RDC |
266 | dev->stats.tx_dropped++; |
267 | } | |
6ed10654 | 268 | return NETDEV_TX_OK; |
9732d523 RDC |
269 | } |
270 | ||
271 | static int pn_net_mtu(struct net_device *dev, int new_mtu) | |
272 | { | |
9732d523 RDC |
273 | if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU)) |
274 | return -EINVAL; | |
5da63cc4 RDC |
275 | dev->mtu = new_mtu; |
276 | return 0; | |
9732d523 RDC |
277 | } |
278 | ||
ab638e69 SH |
279 | static const struct net_device_ops pn_netdev_ops = { |
280 | .ndo_open = pn_net_open, | |
281 | .ndo_stop = pn_net_close, | |
282 | .ndo_start_xmit = pn_net_xmit, | |
283 | .ndo_change_mtu = pn_net_mtu, | |
284 | }; | |
285 | ||
9732d523 RDC |
286 | static void pn_net_setup(struct net_device *dev) |
287 | { | |
288 | dev->features = 0; | |
289 | dev->type = ARPHRD_PHONET; | |
290 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
291 | dev->mtu = PHONET_DEV_MTU; | |
292 | dev->hard_header_len = 1; | |
293 | dev->dev_addr[0] = PN_MEDIA_USB; | |
294 | dev->addr_len = 1; | |
295 | dev->tx_queue_len = 1; | |
296 | ||
ab638e69 | 297 | dev->netdev_ops = &pn_netdev_ops; |
9732d523 RDC |
298 | dev->destructor = free_netdev; |
299 | dev->header_ops = &phonet_header_ops; | |
9732d523 RDC |
300 | } |
301 | ||
302 | /*-------------------------------------------------------------------------*/ | |
303 | ||
304 | /* | |
305 | * Queue buffer for data from the host | |
306 | */ | |
307 | static int | |
308 | pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags) | |
309 | { | |
b91cd144 RDC |
310 | struct net_device *dev = fp->dev; |
311 | struct page *page; | |
9732d523 RDC |
312 | int err; |
313 | ||
b91cd144 RDC |
314 | page = __netdev_alloc_page(dev, gfp_flags); |
315 | if (!page) | |
9732d523 RDC |
316 | return -ENOMEM; |
317 | ||
b91cd144 RDC |
318 | req->buf = page_address(page); |
319 | req->length = PAGE_SIZE; | |
320 | req->context = page; | |
9732d523 RDC |
321 | |
322 | err = usb_ep_queue(fp->out_ep, req, gfp_flags); | |
323 | if (unlikely(err)) | |
b91cd144 | 324 | netdev_free_page(dev, page); |
9732d523 RDC |
325 | return err; |
326 | } | |
327 | ||
328 | static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req) | |
329 | { | |
330 | struct f_phonet *fp = ep->driver_data; | |
331 | struct net_device *dev = fp->dev; | |
b91cd144 RDC |
332 | struct page *page = req->context; |
333 | struct sk_buff *skb; | |
334 | unsigned long flags; | |
9732d523 RDC |
335 | int status = req->status; |
336 | ||
337 | switch (status) { | |
338 | case 0: | |
b91cd144 RDC |
339 | spin_lock_irqsave(&fp->rx.lock, flags); |
340 | skb = fp->rx.skb; | |
341 | if (!skb) | |
342 | skb = fp->rx.skb = netdev_alloc_skb(dev, 12); | |
343 | if (req->actual < req->length) /* Last fragment */ | |
344 | fp->rx.skb = NULL; | |
345 | spin_unlock_irqrestore(&fp->rx.lock, flags); | |
346 | ||
347 | if (unlikely(!skb)) | |
9732d523 | 348 | break; |
b91cd144 RDC |
349 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, 0, |
350 | req->actual); | |
351 | page = NULL; | |
352 | ||
353 | if (req->actual < req->length) { /* Last fragment */ | |
354 | skb->protocol = htons(ETH_P_PHONET); | |
355 | skb_reset_mac_header(skb); | |
356 | pskb_pull(skb, 1); | |
357 | skb->dev = dev; | |
358 | dev->stats.rx_packets++; | |
359 | dev->stats.rx_bytes += skb->len; | |
360 | ||
361 | netif_rx(skb); | |
362 | } | |
9732d523 RDC |
363 | break; |
364 | ||
365 | /* Do not resubmit in these cases: */ | |
366 | case -ESHUTDOWN: /* disconnect */ | |
367 | case -ECONNABORTED: /* hw reset */ | |
368 | case -ECONNRESET: /* dequeued (unlink or netif down) */ | |
369 | req = NULL; | |
370 | break; | |
371 | ||
372 | /* Do resubmit in these cases: */ | |
373 | case -EOVERFLOW: /* request buffer overflow */ | |
374 | dev->stats.rx_over_errors++; | |
375 | default: | |
376 | dev->stats.rx_errors++; | |
377 | break; | |
378 | } | |
379 | ||
b91cd144 RDC |
380 | if (page) |
381 | netdev_free_page(dev, page); | |
9732d523 RDC |
382 | if (req) |
383 | pn_rx_submit(fp, req, GFP_ATOMIC); | |
384 | } | |
385 | ||
386 | /*-------------------------------------------------------------------------*/ | |
387 | ||
388 | static void __pn_reset(struct usb_function *f) | |
389 | { | |
390 | struct f_phonet *fp = func_to_pn(f); | |
391 | struct net_device *dev = fp->dev; | |
392 | struct phonet_port *port = netdev_priv(dev); | |
393 | ||
394 | netif_carrier_off(dev); | |
9732d523 RDC |
395 | port->usb = NULL; |
396 | ||
397 | usb_ep_disable(fp->out_ep); | |
398 | usb_ep_disable(fp->in_ep); | |
b91cd144 RDC |
399 | if (fp->rx.skb) { |
400 | dev_kfree_skb_irq(fp->rx.skb); | |
401 | fp->rx.skb = NULL; | |
402 | } | |
9732d523 RDC |
403 | } |
404 | ||
405 | static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
406 | { | |
407 | struct f_phonet *fp = func_to_pn(f); | |
408 | struct usb_gadget *gadget = fp->function.config->cdev->gadget; | |
409 | ||
410 | if (intf == pn_control_intf_desc.bInterfaceNumber) | |
411 | /* control interface, no altsetting */ | |
412 | return (alt > 0) ? -EINVAL : 0; | |
413 | ||
414 | if (intf == pn_data_intf_desc.bInterfaceNumber) { | |
415 | struct net_device *dev = fp->dev; | |
416 | struct phonet_port *port = netdev_priv(dev); | |
417 | ||
418 | /* data intf (0: inactive, 1: active) */ | |
419 | if (alt > 1) | |
420 | return -EINVAL; | |
421 | ||
422 | spin_lock(&port->lock); | |
423 | __pn_reset(f); | |
424 | if (alt == 1) { | |
425 | struct usb_endpoint_descriptor *out, *in; | |
426 | int i; | |
427 | ||
428 | out = ep_choose(gadget, | |
429 | &pn_hs_sink_desc, | |
430 | &pn_fs_sink_desc); | |
431 | in = ep_choose(gadget, | |
432 | &pn_hs_source_desc, | |
433 | &pn_fs_source_desc); | |
434 | usb_ep_enable(fp->out_ep, out); | |
435 | usb_ep_enable(fp->in_ep, in); | |
436 | ||
437 | port->usb = fp; | |
438 | fp->out_ep->driver_data = fp; | |
439 | fp->in_ep->driver_data = fp; | |
440 | ||
441 | netif_carrier_on(dev); | |
9732d523 RDC |
442 | for (i = 0; i < phonet_rxq_size; i++) |
443 | pn_rx_submit(fp, fp->out_reqv[i], GFP_ATOMIC); | |
444 | } | |
445 | spin_unlock(&port->lock); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | return -EINVAL; | |
450 | } | |
451 | ||
452 | static int pn_get_alt(struct usb_function *f, unsigned intf) | |
453 | { | |
454 | struct f_phonet *fp = func_to_pn(f); | |
455 | ||
456 | if (intf == pn_control_intf_desc.bInterfaceNumber) | |
457 | return 0; | |
458 | ||
459 | if (intf == pn_data_intf_desc.bInterfaceNumber) { | |
460 | struct phonet_port *port = netdev_priv(fp->dev); | |
461 | u8 alt; | |
462 | ||
463 | spin_lock(&port->lock); | |
464 | alt = port->usb != NULL; | |
465 | spin_unlock(&port->lock); | |
466 | return alt; | |
467 | } | |
468 | ||
469 | return -EINVAL; | |
470 | } | |
471 | ||
472 | static void pn_disconnect(struct usb_function *f) | |
473 | { | |
474 | struct f_phonet *fp = func_to_pn(f); | |
475 | struct phonet_port *port = netdev_priv(fp->dev); | |
476 | unsigned long flags; | |
477 | ||
478 | /* remain disabled until set_alt */ | |
479 | spin_lock_irqsave(&port->lock, flags); | |
480 | __pn_reset(f); | |
481 | spin_unlock_irqrestore(&port->lock, flags); | |
482 | } | |
483 | ||
484 | /*-------------------------------------------------------------------------*/ | |
485 | ||
486 | static __init | |
487 | int pn_bind(struct usb_configuration *c, struct usb_function *f) | |
488 | { | |
489 | struct usb_composite_dev *cdev = c->cdev; | |
490 | struct usb_gadget *gadget = cdev->gadget; | |
491 | struct f_phonet *fp = func_to_pn(f); | |
492 | struct usb_ep *ep; | |
493 | int status, i; | |
494 | ||
495 | /* Reserve interface IDs */ | |
496 | status = usb_interface_id(c, f); | |
497 | if (status < 0) | |
498 | goto err; | |
499 | pn_control_intf_desc.bInterfaceNumber = status; | |
500 | pn_union_desc.bMasterInterface0 = status; | |
501 | ||
502 | status = usb_interface_id(c, f); | |
503 | if (status < 0) | |
504 | goto err; | |
505 | pn_data_nop_intf_desc.bInterfaceNumber = status; | |
506 | pn_data_intf_desc.bInterfaceNumber = status; | |
507 | pn_union_desc.bSlaveInterface0 = status; | |
508 | ||
509 | /* Reserve endpoints */ | |
510 | status = -ENODEV; | |
511 | ep = usb_ep_autoconfig(gadget, &pn_fs_sink_desc); | |
512 | if (!ep) | |
513 | goto err; | |
514 | fp->out_ep = ep; | |
515 | ep->driver_data = fp; /* Claim */ | |
516 | ||
517 | ep = usb_ep_autoconfig(gadget, &pn_fs_source_desc); | |
518 | if (!ep) | |
519 | goto err; | |
520 | fp->in_ep = ep; | |
521 | ep->driver_data = fp; /* Claim */ | |
522 | ||
523 | pn_hs_sink_desc.bEndpointAddress = | |
524 | pn_fs_sink_desc.bEndpointAddress; | |
525 | pn_hs_source_desc.bEndpointAddress = | |
526 | pn_fs_source_desc.bEndpointAddress; | |
527 | ||
528 | /* Do not try to bind Phonet twice... */ | |
529 | fp->function.descriptors = fs_pn_function; | |
530 | fp->function.hs_descriptors = hs_pn_function; | |
531 | ||
532 | /* Incoming USB requests */ | |
533 | status = -ENOMEM; | |
534 | for (i = 0; i < phonet_rxq_size; i++) { | |
535 | struct usb_request *req; | |
536 | ||
537 | req = usb_ep_alloc_request(fp->out_ep, GFP_KERNEL); | |
538 | if (!req) | |
539 | goto err; | |
540 | ||
541 | req->complete = pn_rx_complete; | |
542 | fp->out_reqv[i] = req; | |
543 | } | |
544 | ||
545 | /* Outgoing USB requests */ | |
546 | fp->in_req = usb_ep_alloc_request(fp->in_ep, GFP_KERNEL); | |
547 | if (!fp->in_req) | |
548 | goto err; | |
549 | ||
550 | INFO(cdev, "USB CDC Phonet function\n"); | |
551 | INFO(cdev, "using %s, OUT %s, IN %s\n", cdev->gadget->name, | |
552 | fp->out_ep->name, fp->in_ep->name); | |
553 | return 0; | |
554 | ||
555 | err: | |
556 | if (fp->out_ep) | |
557 | fp->out_ep->driver_data = NULL; | |
558 | if (fp->in_ep) | |
559 | fp->in_ep->driver_data = NULL; | |
560 | ERROR(cdev, "USB CDC Phonet: cannot autoconfigure\n"); | |
561 | return status; | |
562 | } | |
563 | ||
564 | static void | |
565 | pn_unbind(struct usb_configuration *c, struct usb_function *f) | |
566 | { | |
567 | struct f_phonet *fp = func_to_pn(f); | |
568 | int i; | |
569 | ||
570 | /* We are already disconnected */ | |
571 | if (fp->in_req) | |
572 | usb_ep_free_request(fp->in_ep, fp->in_req); | |
573 | for (i = 0; i < phonet_rxq_size; i++) | |
574 | if (fp->out_reqv[i]) | |
575 | usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); | |
576 | ||
577 | kfree(fp); | |
578 | } | |
579 | ||
580 | /*-------------------------------------------------------------------------*/ | |
581 | ||
582 | static struct net_device *dev; | |
583 | ||
584 | int __init phonet_bind_config(struct usb_configuration *c) | |
585 | { | |
586 | struct f_phonet *fp; | |
b61b8af0 | 587 | int err, size; |
9732d523 | 588 | |
b61b8af0 RDC |
589 | size = sizeof(*fp) + (phonet_rxq_size * sizeof(struct usb_request *)); |
590 | fp = kzalloc(size, GFP_KERNEL); | |
9732d523 RDC |
591 | if (!fp) |
592 | return -ENOMEM; | |
593 | ||
594 | fp->dev = dev; | |
595 | fp->function.name = "phonet"; | |
596 | fp->function.bind = pn_bind; | |
597 | fp->function.unbind = pn_unbind; | |
598 | fp->function.set_alt = pn_set_alt; | |
599 | fp->function.get_alt = pn_get_alt; | |
600 | fp->function.disable = pn_disconnect; | |
b91cd144 | 601 | spin_lock_init(&fp->rx.lock); |
9732d523 RDC |
602 | |
603 | err = usb_add_function(c, &fp->function); | |
604 | if (err) | |
605 | kfree(fp); | |
606 | return err; | |
607 | } | |
608 | ||
609 | int __init gphonet_setup(struct usb_gadget *gadget) | |
610 | { | |
611 | struct phonet_port *port; | |
612 | int err; | |
613 | ||
614 | /* Create net device */ | |
615 | BUG_ON(dev); | |
b61b8af0 | 616 | dev = alloc_netdev(sizeof(*port), "upnlink%d", pn_net_setup); |
9732d523 RDC |
617 | if (!dev) |
618 | return -ENOMEM; | |
619 | ||
620 | port = netdev_priv(dev); | |
621 | spin_lock_init(&port->lock); | |
622 | netif_carrier_off(dev); | |
9732d523 RDC |
623 | SET_NETDEV_DEV(dev, &gadget->dev); |
624 | ||
625 | err = register_netdev(dev); | |
626 | if (err) | |
627 | free_netdev(dev); | |
628 | return err; | |
629 | } | |
630 | ||
631 | void gphonet_cleanup(void) | |
632 | { | |
633 | unregister_netdev(dev); | |
634 | } |