Commit | Line | Data |
---|---|---|
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. | |
9732d523 RDC |
11 | */ |
12 | ||
b7f080cf | 13 | #include <linux/mm.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
9732d523 RDC |
15 | #include <linux/kernel.h> |
16 | #include <linux/device.h> | |
17 | ||
18 | #include <linux/netdevice.h> | |
19 | #include <linux/if_ether.h> | |
20 | #include <linux/if_phonet.h> | |
21 | #include <linux/if_arp.h> | |
22 | ||
23 | #include <linux/usb/ch9.h> | |
24 | #include <linux/usb/cdc.h> | |
25 | #include <linux/usb/composite.h> | |
26 | ||
27 | #include "u_phonet.h" | |
28 | ||
29 | #define PN_MEDIA_USB 0x1B | |
b91cd144 RDC |
30 | #define MAXPACKET 512 |
31 | #if (PAGE_SIZE % MAXPACKET) | |
32 | #error MAXPACKET must divide PAGE_SIZE! | |
33 | #endif | |
9732d523 RDC |
34 | |
35 | /*-------------------------------------------------------------------------*/ | |
36 | ||
37 | struct phonet_port { | |
38 | struct f_phonet *usb; | |
39 | spinlock_t lock; | |
40 | }; | |
41 | ||
42 | struct f_phonet { | |
43 | struct usb_function function; | |
b91cd144 RDC |
44 | struct { |
45 | struct sk_buff *skb; | |
46 | spinlock_t lock; | |
47 | } rx; | |
9732d523 RDC |
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 | ||
b91cd144 | 55 | static int phonet_rxq_size = 17; |
9732d523 RDC |
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, | |
b91cd144 | 141 | .wMaxPacketSize = cpu_to_le16(MAXPACKET), |
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 | { | |
c69367fd | 191 | netif_wake_queue(dev); |
9732d523 RDC |
192 | return 0; |
193 | } | |
194 | ||
195 | static int pn_net_close(struct net_device *dev) | |
196 | { | |
197 | netif_stop_queue(dev); | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req) | |
202 | { | |
203 | struct f_phonet *fp = ep->driver_data; | |
204 | struct net_device *dev = fp->dev; | |
205 | struct sk_buff *skb = req->context; | |
206 | ||
207 | switch (req->status) { | |
208 | case 0: | |
209 | dev->stats.tx_packets++; | |
210 | dev->stats.tx_bytes += skb->len; | |
211 | break; | |
212 | ||
213 | case -ESHUTDOWN: /* disconnected */ | |
214 | case -ECONNRESET: /* disabled */ | |
215 | dev->stats.tx_aborted_errors++; | |
216 | default: | |
217 | dev->stats.tx_errors++; | |
218 | } | |
219 | ||
220 | dev_kfree_skb_any(skb); | |
c69367fd | 221 | netif_wake_queue(dev); |
9732d523 RDC |
222 | } |
223 | ||
224 | static int pn_net_xmit(struct sk_buff *skb, struct net_device *dev) | |
225 | { | |
226 | struct phonet_port *port = netdev_priv(dev); | |
227 | struct f_phonet *fp; | |
228 | struct usb_request *req; | |
229 | unsigned long flags; | |
230 | ||
231 | if (skb->protocol != htons(ETH_P_PHONET)) | |
232 | goto out; | |
233 | ||
234 | spin_lock_irqsave(&port->lock, flags); | |
235 | fp = port->usb; | |
236 | if (unlikely(!fp)) /* race with carrier loss */ | |
237 | goto out_unlock; | |
238 | ||
239 | req = fp->in_req; | |
240 | req->buf = skb->data; | |
241 | req->length = skb->len; | |
242 | req->complete = pn_tx_complete; | |
243 | req->zero = 1; | |
244 | req->context = skb; | |
245 | ||
246 | if (unlikely(usb_ep_queue(fp->in_ep, req, GFP_ATOMIC))) | |
247 | goto out_unlock; | |
248 | ||
249 | netif_stop_queue(dev); | |
250 | skb = NULL; | |
251 | ||
252 | out_unlock: | |
253 | spin_unlock_irqrestore(&port->lock, flags); | |
254 | out: | |
255 | if (unlikely(skb)) { | |
fa202592 | 256 | dev_kfree_skb(skb); |
9732d523 RDC |
257 | dev->stats.tx_dropped++; |
258 | } | |
6ed10654 | 259 | return NETDEV_TX_OK; |
9732d523 RDC |
260 | } |
261 | ||
262 | static int pn_net_mtu(struct net_device *dev, int new_mtu) | |
263 | { | |
9732d523 RDC |
264 | if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU)) |
265 | return -EINVAL; | |
5da63cc4 RDC |
266 | dev->mtu = new_mtu; |
267 | return 0; | |
9732d523 RDC |
268 | } |
269 | ||
ab638e69 SH |
270 | static const struct net_device_ops pn_netdev_ops = { |
271 | .ndo_open = pn_net_open, | |
272 | .ndo_stop = pn_net_close, | |
273 | .ndo_start_xmit = pn_net_xmit, | |
274 | .ndo_change_mtu = pn_net_mtu, | |
275 | }; | |
276 | ||
9732d523 RDC |
277 | static void pn_net_setup(struct net_device *dev) |
278 | { | |
279 | dev->features = 0; | |
280 | dev->type = ARPHRD_PHONET; | |
281 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
282 | dev->mtu = PHONET_DEV_MTU; | |
283 | dev->hard_header_len = 1; | |
284 | dev->dev_addr[0] = PN_MEDIA_USB; | |
285 | dev->addr_len = 1; | |
286 | dev->tx_queue_len = 1; | |
287 | ||
ab638e69 | 288 | dev->netdev_ops = &pn_netdev_ops; |
9732d523 RDC |
289 | dev->destructor = free_netdev; |
290 | dev->header_ops = &phonet_header_ops; | |
9732d523 RDC |
291 | } |
292 | ||
293 | /*-------------------------------------------------------------------------*/ | |
294 | ||
295 | /* | |
296 | * Queue buffer for data from the host | |
297 | */ | |
298 | static int | |
299 | pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags) | |
300 | { | |
b91cd144 | 301 | struct page *page; |
9732d523 RDC |
302 | int err; |
303 | ||
0614002b | 304 | page = __skb_alloc_page(gfp_flags | __GFP_NOMEMALLOC, NULL); |
b91cd144 | 305 | if (!page) |
9732d523 RDC |
306 | return -ENOMEM; |
307 | ||
b91cd144 RDC |
308 | req->buf = page_address(page); |
309 | req->length = PAGE_SIZE; | |
310 | req->context = page; | |
9732d523 RDC |
311 | |
312 | err = usb_ep_queue(fp->out_ep, req, gfp_flags); | |
313 | if (unlikely(err)) | |
1f2149c1 | 314 | put_page(page); |
9732d523 RDC |
315 | return err; |
316 | } | |
317 | ||
318 | static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req) | |
319 | { | |
320 | struct f_phonet *fp = ep->driver_data; | |
321 | struct net_device *dev = fp->dev; | |
b91cd144 RDC |
322 | struct page *page = req->context; |
323 | struct sk_buff *skb; | |
324 | unsigned long flags; | |
9732d523 RDC |
325 | int status = req->status; |
326 | ||
327 | switch (status) { | |
328 | case 0: | |
b91cd144 RDC |
329 | spin_lock_irqsave(&fp->rx.lock, flags); |
330 | skb = fp->rx.skb; | |
331 | if (!skb) | |
332 | skb = fp->rx.skb = netdev_alloc_skb(dev, 12); | |
333 | if (req->actual < req->length) /* Last fragment */ | |
334 | fp->rx.skb = NULL; | |
335 | spin_unlock_irqrestore(&fp->rx.lock, flags); | |
336 | ||
337 | if (unlikely(!skb)) | |
9732d523 | 338 | break; |
b91cd144 | 339 | |
f5a45325 | 340 | if (skb->len == 0) { /* First fragment */ |
b91cd144 RDC |
341 | skb->protocol = htons(ETH_P_PHONET); |
342 | skb_reset_mac_header(skb); | |
f5a45325 RDC |
343 | /* Can't use pskb_pull() on page in IRQ */ |
344 | memcpy(skb_put(skb, 1), page_address(page), 1); | |
345 | } | |
346 | ||
347 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, | |
21dcda60 | 348 | skb->len <= 1, req->actual, PAGE_SIZE); |
f5a45325 RDC |
349 | page = NULL; |
350 | ||
351 | if (req->actual < req->length) { /* Last fragment */ | |
b91cd144 RDC |
352 | skb->dev = dev; |
353 | dev->stats.rx_packets++; | |
354 | dev->stats.rx_bytes += skb->len; | |
355 | ||
356 | netif_rx(skb); | |
357 | } | |
9732d523 RDC |
358 | break; |
359 | ||
360 | /* Do not resubmit in these cases: */ | |
361 | case -ESHUTDOWN: /* disconnect */ | |
362 | case -ECONNABORTED: /* hw reset */ | |
363 | case -ECONNRESET: /* dequeued (unlink or netif down) */ | |
364 | req = NULL; | |
365 | break; | |
366 | ||
367 | /* Do resubmit in these cases: */ | |
368 | case -EOVERFLOW: /* request buffer overflow */ | |
369 | dev->stats.rx_over_errors++; | |
370 | default: | |
371 | dev->stats.rx_errors++; | |
372 | break; | |
373 | } | |
374 | ||
b91cd144 | 375 | if (page) |
1f2149c1 | 376 | put_page(page); |
9732d523 | 377 | if (req) |
1f2149c1 | 378 | pn_rx_submit(fp, req, GFP_ATOMIC | __GFP_COLD); |
9732d523 RDC |
379 | } |
380 | ||
381 | /*-------------------------------------------------------------------------*/ | |
382 | ||
383 | static void __pn_reset(struct usb_function *f) | |
384 | { | |
385 | struct f_phonet *fp = func_to_pn(f); | |
386 | struct net_device *dev = fp->dev; | |
387 | struct phonet_port *port = netdev_priv(dev); | |
388 | ||
389 | netif_carrier_off(dev); | |
9732d523 RDC |
390 | port->usb = NULL; |
391 | ||
392 | usb_ep_disable(fp->out_ep); | |
393 | usb_ep_disable(fp->in_ep); | |
b91cd144 RDC |
394 | if (fp->rx.skb) { |
395 | dev_kfree_skb_irq(fp->rx.skb); | |
396 | fp->rx.skb = NULL; | |
397 | } | |
9732d523 RDC |
398 | } |
399 | ||
400 | static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
401 | { | |
402 | struct f_phonet *fp = func_to_pn(f); | |
403 | struct usb_gadget *gadget = fp->function.config->cdev->gadget; | |
404 | ||
405 | if (intf == pn_control_intf_desc.bInterfaceNumber) | |
406 | /* control interface, no altsetting */ | |
407 | return (alt > 0) ? -EINVAL : 0; | |
408 | ||
409 | if (intf == pn_data_intf_desc.bInterfaceNumber) { | |
410 | struct net_device *dev = fp->dev; | |
411 | struct phonet_port *port = netdev_priv(dev); | |
412 | ||
413 | /* data intf (0: inactive, 1: active) */ | |
414 | if (alt > 1) | |
415 | return -EINVAL; | |
416 | ||
417 | spin_lock(&port->lock); | |
418 | __pn_reset(f); | |
419 | if (alt == 1) { | |
9732d523 RDC |
420 | int i; |
421 | ||
ea2a1df7 TB |
422 | if (config_ep_by_speed(gadget, f, fp->in_ep) || |
423 | config_ep_by_speed(gadget, f, fp->out_ep)) { | |
424 | fp->in_ep->desc = NULL; | |
425 | fp->out_ep->desc = NULL; | |
bb8070c2 | 426 | spin_unlock(&port->lock); |
ea2a1df7 TB |
427 | return -EINVAL; |
428 | } | |
72c973dd TB |
429 | usb_ep_enable(fp->out_ep); |
430 | usb_ep_enable(fp->in_ep); | |
9732d523 RDC |
431 | |
432 | port->usb = fp; | |
433 | fp->out_ep->driver_data = fp; | |
434 | fp->in_ep->driver_data = fp; | |
435 | ||
436 | netif_carrier_on(dev); | |
9732d523 | 437 | for (i = 0; i < phonet_rxq_size; i++) |
1f2149c1 | 438 | pn_rx_submit(fp, fp->out_reqv[i], GFP_ATOMIC | __GFP_COLD); |
9732d523 RDC |
439 | } |
440 | spin_unlock(&port->lock); | |
441 | return 0; | |
442 | } | |
443 | ||
444 | return -EINVAL; | |
445 | } | |
446 | ||
447 | static int pn_get_alt(struct usb_function *f, unsigned intf) | |
448 | { | |
449 | struct f_phonet *fp = func_to_pn(f); | |
450 | ||
451 | if (intf == pn_control_intf_desc.bInterfaceNumber) | |
452 | return 0; | |
453 | ||
454 | if (intf == pn_data_intf_desc.bInterfaceNumber) { | |
455 | struct phonet_port *port = netdev_priv(fp->dev); | |
456 | u8 alt; | |
457 | ||
458 | spin_lock(&port->lock); | |
459 | alt = port->usb != NULL; | |
460 | spin_unlock(&port->lock); | |
461 | return alt; | |
462 | } | |
463 | ||
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | static void pn_disconnect(struct usb_function *f) | |
468 | { | |
469 | struct f_phonet *fp = func_to_pn(f); | |
470 | struct phonet_port *port = netdev_priv(fp->dev); | |
471 | unsigned long flags; | |
472 | ||
473 | /* remain disabled until set_alt */ | |
474 | spin_lock_irqsave(&port->lock, flags); | |
475 | __pn_reset(f); | |
476 | spin_unlock_irqrestore(&port->lock, flags); | |
477 | } | |
478 | ||
479 | /*-------------------------------------------------------------------------*/ | |
480 | ||
481 | static __init | |
482 | int pn_bind(struct usb_configuration *c, struct usb_function *f) | |
483 | { | |
484 | struct usb_composite_dev *cdev = c->cdev; | |
485 | struct usb_gadget *gadget = cdev->gadget; | |
486 | struct f_phonet *fp = func_to_pn(f); | |
487 | struct usb_ep *ep; | |
488 | int status, i; | |
489 | ||
490 | /* Reserve interface IDs */ | |
491 | status = usb_interface_id(c, f); | |
492 | if (status < 0) | |
493 | goto err; | |
494 | pn_control_intf_desc.bInterfaceNumber = status; | |
495 | pn_union_desc.bMasterInterface0 = status; | |
496 | ||
497 | status = usb_interface_id(c, f); | |
498 | if (status < 0) | |
499 | goto err; | |
500 | pn_data_nop_intf_desc.bInterfaceNumber = status; | |
501 | pn_data_intf_desc.bInterfaceNumber = status; | |
502 | pn_union_desc.bSlaveInterface0 = status; | |
503 | ||
504 | /* Reserve endpoints */ | |
505 | status = -ENODEV; | |
506 | ep = usb_ep_autoconfig(gadget, &pn_fs_sink_desc); | |
507 | if (!ep) | |
508 | goto err; | |
509 | fp->out_ep = ep; | |
510 | ep->driver_data = fp; /* Claim */ | |
511 | ||
512 | ep = usb_ep_autoconfig(gadget, &pn_fs_source_desc); | |
513 | if (!ep) | |
514 | goto err; | |
515 | fp->in_ep = ep; | |
516 | ep->driver_data = fp; /* Claim */ | |
517 | ||
10287bae SAS |
518 | pn_hs_sink_desc.bEndpointAddress = pn_fs_sink_desc.bEndpointAddress; |
519 | pn_hs_source_desc.bEndpointAddress = pn_fs_source_desc.bEndpointAddress; | |
9732d523 RDC |
520 | |
521 | /* Do not try to bind Phonet twice... */ | |
10287bae SAS |
522 | status = usb_assign_descriptors(f, fs_pn_function, hs_pn_function, |
523 | NULL); | |
524 | if (status) | |
525 | goto err; | |
9732d523 RDC |
526 | |
527 | /* Incoming USB requests */ | |
528 | status = -ENOMEM; | |
529 | for (i = 0; i < phonet_rxq_size; i++) { | |
530 | struct usb_request *req; | |
531 | ||
532 | req = usb_ep_alloc_request(fp->out_ep, GFP_KERNEL); | |
533 | if (!req) | |
d0eca719 | 534 | goto err_req; |
9732d523 RDC |
535 | |
536 | req->complete = pn_rx_complete; | |
537 | fp->out_reqv[i] = req; | |
538 | } | |
539 | ||
540 | /* Outgoing USB requests */ | |
541 | fp->in_req = usb_ep_alloc_request(fp->in_ep, GFP_KERNEL); | |
542 | if (!fp->in_req) | |
d0eca719 | 543 | goto err_req; |
9732d523 RDC |
544 | |
545 | INFO(cdev, "USB CDC Phonet function\n"); | |
546 | INFO(cdev, "using %s, OUT %s, IN %s\n", cdev->gadget->name, | |
547 | fp->out_ep->name, fp->in_ep->name); | |
548 | return 0; | |
549 | ||
d0eca719 SAS |
550 | err_req: |
551 | for (i = 0; i < phonet_rxq_size && fp->out_reqv[i]; i++) | |
552 | usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); | |
9732d523 | 553 | err: |
10287bae | 554 | usb_free_all_descriptors(f); |
9732d523 RDC |
555 | if (fp->out_ep) |
556 | fp->out_ep->driver_data = NULL; | |
557 | if (fp->in_ep) | |
558 | fp->in_ep->driver_data = NULL; | |
559 | ERROR(cdev, "USB CDC Phonet: cannot autoconfigure\n"); | |
560 | return status; | |
561 | } | |
562 | ||
563 | static void | |
564 | pn_unbind(struct usb_configuration *c, struct usb_function *f) | |
565 | { | |
566 | struct f_phonet *fp = func_to_pn(f); | |
567 | int i; | |
568 | ||
569 | /* We are already disconnected */ | |
570 | if (fp->in_req) | |
571 | usb_ep_free_request(fp->in_ep, fp->in_req); | |
572 | for (i = 0; i < phonet_rxq_size; i++) | |
573 | if (fp->out_reqv[i]) | |
574 | usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); | |
575 | ||
10287bae | 576 | usb_free_all_descriptors(f); |
9732d523 RDC |
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 | } |