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 | 15 | #include <linux/kernel.h> |
fcbdf12e | 16 | #include <linux/module.h> |
9732d523 RDC |
17 | #include <linux/device.h> |
18 | ||
19 | #include <linux/netdevice.h> | |
20 | #include <linux/if_ether.h> | |
21 | #include <linux/if_phonet.h> | |
22 | #include <linux/if_arp.h> | |
23 | ||
24 | #include <linux/usb/ch9.h> | |
25 | #include <linux/usb/cdc.h> | |
26 | #include <linux/usb/composite.h> | |
27 | ||
28 | #include "u_phonet.h" | |
83408745 | 29 | #include "u_ether.h" |
9732d523 RDC |
30 | |
31 | #define PN_MEDIA_USB 0x1B | |
b91cd144 RDC |
32 | #define MAXPACKET 512 |
33 | #if (PAGE_SIZE % MAXPACKET) | |
34 | #error MAXPACKET must divide PAGE_SIZE! | |
35 | #endif | |
9732d523 RDC |
36 | |
37 | /*-------------------------------------------------------------------------*/ | |
38 | ||
39 | struct phonet_port { | |
40 | struct f_phonet *usb; | |
41 | spinlock_t lock; | |
42 | }; | |
43 | ||
44 | struct f_phonet { | |
45 | struct usb_function function; | |
b91cd144 RDC |
46 | struct { |
47 | struct sk_buff *skb; | |
48 | spinlock_t lock; | |
49 | } rx; | |
9732d523 RDC |
50 | struct net_device *dev; |
51 | struct usb_ep *in_ep, *out_ep; | |
52 | ||
53 | struct usb_request *in_req; | |
54 | struct usb_request *out_reqv[0]; | |
55 | }; | |
56 | ||
b91cd144 | 57 | static int phonet_rxq_size = 17; |
9732d523 RDC |
58 | |
59 | static inline struct f_phonet *func_to_pn(struct usb_function *f) | |
60 | { | |
61 | return container_of(f, struct f_phonet, function); | |
62 | } | |
63 | ||
64 | /*-------------------------------------------------------------------------*/ | |
65 | ||
66 | #define USB_CDC_SUBCLASS_PHONET 0xfe | |
67 | #define USB_CDC_PHONET_TYPE 0xab | |
68 | ||
69 | static struct usb_interface_descriptor | |
70 | pn_control_intf_desc = { | |
71 | .bLength = sizeof pn_control_intf_desc, | |
72 | .bDescriptorType = USB_DT_INTERFACE, | |
73 | ||
74 | /* .bInterfaceNumber = DYNAMIC, */ | |
75 | .bInterfaceClass = USB_CLASS_COMM, | |
76 | .bInterfaceSubClass = USB_CDC_SUBCLASS_PHONET, | |
77 | }; | |
78 | ||
79 | static const struct usb_cdc_header_desc | |
80 | pn_header_desc = { | |
81 | .bLength = sizeof pn_header_desc, | |
82 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
83 | .bDescriptorSubType = USB_CDC_HEADER_TYPE, | |
551509d2 | 84 | .bcdCDC = cpu_to_le16(0x0110), |
9732d523 RDC |
85 | }; |
86 | ||
87 | static const struct usb_cdc_header_desc | |
88 | pn_phonet_desc = { | |
89 | .bLength = sizeof pn_phonet_desc, | |
90 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
91 | .bDescriptorSubType = USB_CDC_PHONET_TYPE, | |
551509d2 | 92 | .bcdCDC = cpu_to_le16(0x1505), /* ??? */ |
9732d523 RDC |
93 | }; |
94 | ||
95 | static struct usb_cdc_union_desc | |
96 | pn_union_desc = { | |
97 | .bLength = sizeof pn_union_desc, | |
98 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
99 | .bDescriptorSubType = USB_CDC_UNION_TYPE, | |
100 | ||
101 | /* .bMasterInterface0 = DYNAMIC, */ | |
102 | /* .bSlaveInterface0 = DYNAMIC, */ | |
103 | }; | |
104 | ||
105 | static struct usb_interface_descriptor | |
106 | pn_data_nop_intf_desc = { | |
107 | .bLength = sizeof pn_data_nop_intf_desc, | |
108 | .bDescriptorType = USB_DT_INTERFACE, | |
109 | ||
110 | /* .bInterfaceNumber = DYNAMIC, */ | |
111 | .bAlternateSetting = 0, | |
112 | .bNumEndpoints = 0, | |
113 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
114 | }; | |
115 | ||
116 | static struct usb_interface_descriptor | |
117 | pn_data_intf_desc = { | |
118 | .bLength = sizeof pn_data_intf_desc, | |
119 | .bDescriptorType = USB_DT_INTERFACE, | |
120 | ||
121 | /* .bInterfaceNumber = DYNAMIC, */ | |
122 | .bAlternateSetting = 1, | |
123 | .bNumEndpoints = 2, | |
124 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
125 | }; | |
126 | ||
127 | static struct usb_endpoint_descriptor | |
128 | pn_fs_sink_desc = { | |
129 | .bLength = USB_DT_ENDPOINT_SIZE, | |
130 | .bDescriptorType = USB_DT_ENDPOINT, | |
131 | ||
132 | .bEndpointAddress = USB_DIR_OUT, | |
133 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
134 | }; | |
135 | ||
136 | static struct usb_endpoint_descriptor | |
137 | pn_hs_sink_desc = { | |
138 | .bLength = USB_DT_ENDPOINT_SIZE, | |
139 | .bDescriptorType = USB_DT_ENDPOINT, | |
140 | ||
141 | .bEndpointAddress = USB_DIR_OUT, | |
142 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
b91cd144 | 143 | .wMaxPacketSize = cpu_to_le16(MAXPACKET), |
9732d523 RDC |
144 | }; |
145 | ||
146 | static struct usb_endpoint_descriptor | |
147 | pn_fs_source_desc = { | |
148 | .bLength = USB_DT_ENDPOINT_SIZE, | |
149 | .bDescriptorType = USB_DT_ENDPOINT, | |
150 | ||
151 | .bEndpointAddress = USB_DIR_IN, | |
152 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
153 | }; | |
154 | ||
155 | static struct usb_endpoint_descriptor | |
156 | pn_hs_source_desc = { | |
157 | .bLength = USB_DT_ENDPOINT_SIZE, | |
158 | .bDescriptorType = USB_DT_ENDPOINT, | |
159 | ||
160 | .bEndpointAddress = USB_DIR_IN, | |
161 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 162 | .wMaxPacketSize = cpu_to_le16(512), |
9732d523 RDC |
163 | }; |
164 | ||
165 | static struct usb_descriptor_header *fs_pn_function[] = { | |
166 | (struct usb_descriptor_header *) &pn_control_intf_desc, | |
167 | (struct usb_descriptor_header *) &pn_header_desc, | |
168 | (struct usb_descriptor_header *) &pn_phonet_desc, | |
169 | (struct usb_descriptor_header *) &pn_union_desc, | |
170 | (struct usb_descriptor_header *) &pn_data_nop_intf_desc, | |
171 | (struct usb_descriptor_header *) &pn_data_intf_desc, | |
172 | (struct usb_descriptor_header *) &pn_fs_sink_desc, | |
173 | (struct usb_descriptor_header *) &pn_fs_source_desc, | |
174 | NULL, | |
175 | }; | |
176 | ||
177 | static struct usb_descriptor_header *hs_pn_function[] = { | |
178 | (struct usb_descriptor_header *) &pn_control_intf_desc, | |
179 | (struct usb_descriptor_header *) &pn_header_desc, | |
180 | (struct usb_descriptor_header *) &pn_phonet_desc, | |
181 | (struct usb_descriptor_header *) &pn_union_desc, | |
182 | (struct usb_descriptor_header *) &pn_data_nop_intf_desc, | |
183 | (struct usb_descriptor_header *) &pn_data_intf_desc, | |
184 | (struct usb_descriptor_header *) &pn_hs_sink_desc, | |
185 | (struct usb_descriptor_header *) &pn_hs_source_desc, | |
186 | NULL, | |
187 | }; | |
188 | ||
189 | /*-------------------------------------------------------------------------*/ | |
190 | ||
191 | static int pn_net_open(struct net_device *dev) | |
192 | { | |
c69367fd | 193 | netif_wake_queue(dev); |
9732d523 RDC |
194 | return 0; |
195 | } | |
196 | ||
197 | static int pn_net_close(struct net_device *dev) | |
198 | { | |
199 | netif_stop_queue(dev); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req) | |
204 | { | |
205 | struct f_phonet *fp = ep->driver_data; | |
206 | struct net_device *dev = fp->dev; | |
207 | struct sk_buff *skb = req->context; | |
208 | ||
209 | switch (req->status) { | |
210 | case 0: | |
211 | dev->stats.tx_packets++; | |
212 | dev->stats.tx_bytes += skb->len; | |
213 | break; | |
214 | ||
215 | case -ESHUTDOWN: /* disconnected */ | |
216 | case -ECONNRESET: /* disabled */ | |
217 | dev->stats.tx_aborted_errors++; | |
218 | default: | |
219 | dev->stats.tx_errors++; | |
220 | } | |
221 | ||
222 | dev_kfree_skb_any(skb); | |
c69367fd | 223 | netif_wake_queue(dev); |
9732d523 RDC |
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)) { | |
fa202592 | 258 | dev_kfree_skb(skb); |
9732d523 RDC |
259 | dev->stats.tx_dropped++; |
260 | } | |
6ed10654 | 261 | return NETDEV_TX_OK; |
9732d523 RDC |
262 | } |
263 | ||
264 | static int pn_net_mtu(struct net_device *dev, int new_mtu) | |
265 | { | |
9732d523 RDC |
266 | if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU)) |
267 | return -EINVAL; | |
5da63cc4 RDC |
268 | dev->mtu = new_mtu; |
269 | return 0; | |
9732d523 RDC |
270 | } |
271 | ||
ab638e69 SH |
272 | static const struct net_device_ops pn_netdev_ops = { |
273 | .ndo_open = pn_net_open, | |
274 | .ndo_stop = pn_net_close, | |
275 | .ndo_start_xmit = pn_net_xmit, | |
276 | .ndo_change_mtu = pn_net_mtu, | |
277 | }; | |
278 | ||
9732d523 RDC |
279 | static void pn_net_setup(struct net_device *dev) |
280 | { | |
281 | dev->features = 0; | |
282 | dev->type = ARPHRD_PHONET; | |
283 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
284 | dev->mtu = PHONET_DEV_MTU; | |
285 | dev->hard_header_len = 1; | |
286 | dev->dev_addr[0] = PN_MEDIA_USB; | |
287 | dev->addr_len = 1; | |
288 | dev->tx_queue_len = 1; | |
289 | ||
ab638e69 | 290 | dev->netdev_ops = &pn_netdev_ops; |
9732d523 RDC |
291 | dev->destructor = free_netdev; |
292 | dev->header_ops = &phonet_header_ops; | |
9732d523 RDC |
293 | } |
294 | ||
295 | /*-------------------------------------------------------------------------*/ | |
296 | ||
297 | /* | |
298 | * Queue buffer for data from the host | |
299 | */ | |
300 | static int | |
301 | pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags) | |
302 | { | |
b91cd144 | 303 | struct page *page; |
9732d523 RDC |
304 | int err; |
305 | ||
0614002b | 306 | page = __skb_alloc_page(gfp_flags | __GFP_NOMEMALLOC, NULL); |
b91cd144 | 307 | if (!page) |
9732d523 RDC |
308 | return -ENOMEM; |
309 | ||
b91cd144 RDC |
310 | req->buf = page_address(page); |
311 | req->length = PAGE_SIZE; | |
312 | req->context = page; | |
9732d523 RDC |
313 | |
314 | err = usb_ep_queue(fp->out_ep, req, gfp_flags); | |
315 | if (unlikely(err)) | |
1f2149c1 | 316 | put_page(page); |
9732d523 RDC |
317 | return err; |
318 | } | |
319 | ||
320 | static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req) | |
321 | { | |
322 | struct f_phonet *fp = ep->driver_data; | |
323 | struct net_device *dev = fp->dev; | |
b91cd144 RDC |
324 | struct page *page = req->context; |
325 | struct sk_buff *skb; | |
326 | unsigned long flags; | |
9732d523 RDC |
327 | int status = req->status; |
328 | ||
329 | switch (status) { | |
330 | case 0: | |
b91cd144 RDC |
331 | spin_lock_irqsave(&fp->rx.lock, flags); |
332 | skb = fp->rx.skb; | |
333 | if (!skb) | |
334 | skb = fp->rx.skb = netdev_alloc_skb(dev, 12); | |
335 | if (req->actual < req->length) /* Last fragment */ | |
336 | fp->rx.skb = NULL; | |
337 | spin_unlock_irqrestore(&fp->rx.lock, flags); | |
338 | ||
339 | if (unlikely(!skb)) | |
9732d523 | 340 | break; |
b91cd144 | 341 | |
f5a45325 | 342 | if (skb->len == 0) { /* First fragment */ |
b91cd144 RDC |
343 | skb->protocol = htons(ETH_P_PHONET); |
344 | skb_reset_mac_header(skb); | |
f5a45325 RDC |
345 | /* Can't use pskb_pull() on page in IRQ */ |
346 | memcpy(skb_put(skb, 1), page_address(page), 1); | |
347 | } | |
348 | ||
349 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, | |
21dcda60 | 350 | skb->len <= 1, req->actual, PAGE_SIZE); |
f5a45325 RDC |
351 | page = NULL; |
352 | ||
353 | if (req->actual < req->length) { /* Last fragment */ | |
b91cd144 RDC |
354 | skb->dev = dev; |
355 | dev->stats.rx_packets++; | |
356 | dev->stats.rx_bytes += skb->len; | |
357 | ||
358 | netif_rx(skb); | |
359 | } | |
9732d523 RDC |
360 | break; |
361 | ||
362 | /* Do not resubmit in these cases: */ | |
363 | case -ESHUTDOWN: /* disconnect */ | |
364 | case -ECONNABORTED: /* hw reset */ | |
365 | case -ECONNRESET: /* dequeued (unlink or netif down) */ | |
366 | req = NULL; | |
367 | break; | |
368 | ||
369 | /* Do resubmit in these cases: */ | |
370 | case -EOVERFLOW: /* request buffer overflow */ | |
371 | dev->stats.rx_over_errors++; | |
372 | default: | |
373 | dev->stats.rx_errors++; | |
374 | break; | |
375 | } | |
376 | ||
b91cd144 | 377 | if (page) |
1f2149c1 | 378 | put_page(page); |
9732d523 | 379 | if (req) |
1f2149c1 | 380 | pn_rx_submit(fp, req, GFP_ATOMIC | __GFP_COLD); |
9732d523 RDC |
381 | } |
382 | ||
383 | /*-------------------------------------------------------------------------*/ | |
384 | ||
385 | static void __pn_reset(struct usb_function *f) | |
386 | { | |
387 | struct f_phonet *fp = func_to_pn(f); | |
388 | struct net_device *dev = fp->dev; | |
389 | struct phonet_port *port = netdev_priv(dev); | |
390 | ||
391 | netif_carrier_off(dev); | |
9732d523 RDC |
392 | port->usb = NULL; |
393 | ||
394 | usb_ep_disable(fp->out_ep); | |
395 | usb_ep_disable(fp->in_ep); | |
b91cd144 RDC |
396 | if (fp->rx.skb) { |
397 | dev_kfree_skb_irq(fp->rx.skb); | |
398 | fp->rx.skb = NULL; | |
399 | } | |
9732d523 RDC |
400 | } |
401 | ||
402 | static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
403 | { | |
404 | struct f_phonet *fp = func_to_pn(f); | |
405 | struct usb_gadget *gadget = fp->function.config->cdev->gadget; | |
406 | ||
407 | if (intf == pn_control_intf_desc.bInterfaceNumber) | |
408 | /* control interface, no altsetting */ | |
409 | return (alt > 0) ? -EINVAL : 0; | |
410 | ||
411 | if (intf == pn_data_intf_desc.bInterfaceNumber) { | |
412 | struct net_device *dev = fp->dev; | |
413 | struct phonet_port *port = netdev_priv(dev); | |
414 | ||
415 | /* data intf (0: inactive, 1: active) */ | |
416 | if (alt > 1) | |
417 | return -EINVAL; | |
418 | ||
419 | spin_lock(&port->lock); | |
420 | __pn_reset(f); | |
421 | if (alt == 1) { | |
9732d523 RDC |
422 | int i; |
423 | ||
ea2a1df7 TB |
424 | if (config_ep_by_speed(gadget, f, fp->in_ep) || |
425 | config_ep_by_speed(gadget, f, fp->out_ep)) { | |
426 | fp->in_ep->desc = NULL; | |
427 | fp->out_ep->desc = NULL; | |
bb8070c2 | 428 | spin_unlock(&port->lock); |
ea2a1df7 TB |
429 | return -EINVAL; |
430 | } | |
72c973dd TB |
431 | usb_ep_enable(fp->out_ep); |
432 | usb_ep_enable(fp->in_ep); | |
9732d523 RDC |
433 | |
434 | port->usb = fp; | |
435 | fp->out_ep->driver_data = fp; | |
436 | fp->in_ep->driver_data = fp; | |
437 | ||
438 | netif_carrier_on(dev); | |
9732d523 | 439 | for (i = 0; i < phonet_rxq_size; i++) |
1f2149c1 | 440 | pn_rx_submit(fp, fp->out_reqv[i], GFP_ATOMIC | __GFP_COLD); |
9732d523 RDC |
441 | } |
442 | spin_unlock(&port->lock); | |
443 | return 0; | |
444 | } | |
445 | ||
446 | return -EINVAL; | |
447 | } | |
448 | ||
449 | static int pn_get_alt(struct usb_function *f, unsigned intf) | |
450 | { | |
451 | struct f_phonet *fp = func_to_pn(f); | |
452 | ||
453 | if (intf == pn_control_intf_desc.bInterfaceNumber) | |
454 | return 0; | |
455 | ||
456 | if (intf == pn_data_intf_desc.bInterfaceNumber) { | |
457 | struct phonet_port *port = netdev_priv(fp->dev); | |
458 | u8 alt; | |
459 | ||
460 | spin_lock(&port->lock); | |
461 | alt = port->usb != NULL; | |
462 | spin_unlock(&port->lock); | |
463 | return alt; | |
464 | } | |
465 | ||
466 | return -EINVAL; | |
467 | } | |
468 | ||
469 | static void pn_disconnect(struct usb_function *f) | |
470 | { | |
471 | struct f_phonet *fp = func_to_pn(f); | |
472 | struct phonet_port *port = netdev_priv(fp->dev); | |
473 | unsigned long flags; | |
474 | ||
475 | /* remain disabled until set_alt */ | |
476 | spin_lock_irqsave(&port->lock, flags); | |
477 | __pn_reset(f); | |
478 | spin_unlock_irqrestore(&port->lock, flags); | |
479 | } | |
480 | ||
481 | /*-------------------------------------------------------------------------*/ | |
482 | ||
fcbdf12e | 483 | static int pn_bind(struct usb_configuration *c, struct usb_function *f) |
9732d523 RDC |
484 | { |
485 | struct usb_composite_dev *cdev = c->cdev; | |
486 | struct usb_gadget *gadget = cdev->gadget; | |
487 | struct f_phonet *fp = func_to_pn(f); | |
488 | struct usb_ep *ep; | |
489 | int status, i; | |
490 | ||
fcbdf12e AP |
491 | struct f_phonet_opts *phonet_opts; |
492 | ||
493 | phonet_opts = container_of(f->fi, struct f_phonet_opts, func_inst); | |
494 | ||
495 | /* | |
496 | * in drivers/usb/gadget/configfs.c:configfs_composite_bind() | |
497 | * configurations are bound in sequence with list_for_each_entry, | |
498 | * in each configuration its functions are bound in sequence | |
499 | * with list_for_each_entry, so we assume no race condition | |
500 | * with regard to phonet_opts->bound access | |
501 | */ | |
502 | if (!phonet_opts->bound) { | |
503 | gphonet_set_gadget(phonet_opts->net, gadget); | |
504 | status = gphonet_register_netdev(phonet_opts->net); | |
505 | if (status) | |
506 | return status; | |
507 | phonet_opts->bound = true; | |
508 | } | |
fcbdf12e | 509 | |
9732d523 RDC |
510 | /* Reserve interface IDs */ |
511 | status = usb_interface_id(c, f); | |
512 | if (status < 0) | |
513 | goto err; | |
514 | pn_control_intf_desc.bInterfaceNumber = status; | |
515 | pn_union_desc.bMasterInterface0 = status; | |
516 | ||
517 | status = usb_interface_id(c, f); | |
518 | if (status < 0) | |
519 | goto err; | |
520 | pn_data_nop_intf_desc.bInterfaceNumber = status; | |
521 | pn_data_intf_desc.bInterfaceNumber = status; | |
522 | pn_union_desc.bSlaveInterface0 = status; | |
523 | ||
524 | /* Reserve endpoints */ | |
525 | status = -ENODEV; | |
526 | ep = usb_ep_autoconfig(gadget, &pn_fs_sink_desc); | |
527 | if (!ep) | |
528 | goto err; | |
529 | fp->out_ep = ep; | |
530 | ep->driver_data = fp; /* Claim */ | |
531 | ||
532 | ep = usb_ep_autoconfig(gadget, &pn_fs_source_desc); | |
533 | if (!ep) | |
534 | goto err; | |
535 | fp->in_ep = ep; | |
536 | ep->driver_data = fp; /* Claim */ | |
537 | ||
10287bae SAS |
538 | pn_hs_sink_desc.bEndpointAddress = pn_fs_sink_desc.bEndpointAddress; |
539 | pn_hs_source_desc.bEndpointAddress = pn_fs_source_desc.bEndpointAddress; | |
9732d523 RDC |
540 | |
541 | /* Do not try to bind Phonet twice... */ | |
10287bae SAS |
542 | status = usb_assign_descriptors(f, fs_pn_function, hs_pn_function, |
543 | NULL); | |
544 | if (status) | |
545 | goto err; | |
9732d523 RDC |
546 | |
547 | /* Incoming USB requests */ | |
548 | status = -ENOMEM; | |
549 | for (i = 0; i < phonet_rxq_size; i++) { | |
550 | struct usb_request *req; | |
551 | ||
552 | req = usb_ep_alloc_request(fp->out_ep, GFP_KERNEL); | |
553 | if (!req) | |
d0eca719 | 554 | goto err_req; |
9732d523 RDC |
555 | |
556 | req->complete = pn_rx_complete; | |
557 | fp->out_reqv[i] = req; | |
558 | } | |
559 | ||
560 | /* Outgoing USB requests */ | |
561 | fp->in_req = usb_ep_alloc_request(fp->in_ep, GFP_KERNEL); | |
562 | if (!fp->in_req) | |
d0eca719 | 563 | goto err_req; |
9732d523 RDC |
564 | |
565 | INFO(cdev, "USB CDC Phonet function\n"); | |
566 | INFO(cdev, "using %s, OUT %s, IN %s\n", cdev->gadget->name, | |
567 | fp->out_ep->name, fp->in_ep->name); | |
568 | return 0; | |
569 | ||
d0eca719 SAS |
570 | err_req: |
571 | for (i = 0; i < phonet_rxq_size && fp->out_reqv[i]; i++) | |
572 | usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); | |
9732d523 | 573 | err: |
10287bae | 574 | usb_free_all_descriptors(f); |
9732d523 RDC |
575 | if (fp->out_ep) |
576 | fp->out_ep->driver_data = NULL; | |
577 | if (fp->in_ep) | |
578 | fp->in_ep->driver_data = NULL; | |
579 | ERROR(cdev, "USB CDC Phonet: cannot autoconfigure\n"); | |
580 | return status; | |
581 | } | |
582 | ||
83408745 AP |
583 | static inline struct f_phonet_opts *to_f_phonet_opts(struct config_item *item) |
584 | { | |
585 | return container_of(to_config_group(item), struct f_phonet_opts, | |
586 | func_inst.group); | |
587 | } | |
588 | ||
589 | CONFIGFS_ATTR_STRUCT(f_phonet_opts); | |
590 | static ssize_t f_phonet_attr_show(struct config_item *item, | |
591 | struct configfs_attribute *attr, | |
592 | char *page) | |
593 | { | |
594 | struct f_phonet_opts *opts = to_f_phonet_opts(item); | |
595 | struct f_phonet_opts_attribute *f_phonet_opts_attr = | |
596 | container_of(attr, struct f_phonet_opts_attribute, attr); | |
597 | ssize_t ret = 0; | |
598 | ||
599 | if (f_phonet_opts_attr->show) | |
600 | ret = f_phonet_opts_attr->show(opts, page); | |
601 | return ret; | |
602 | } | |
603 | ||
604 | static void phonet_attr_release(struct config_item *item) | |
605 | { | |
606 | struct f_phonet_opts *opts = to_f_phonet_opts(item); | |
607 | ||
608 | usb_put_function_instance(&opts->func_inst); | |
609 | } | |
610 | ||
611 | static struct configfs_item_operations phonet_item_ops = { | |
612 | .release = phonet_attr_release, | |
613 | .show_attribute = f_phonet_attr_show, | |
614 | }; | |
615 | ||
616 | static ssize_t f_phonet_ifname_show(struct f_phonet_opts *opts, char *page) | |
617 | { | |
618 | return gether_get_ifname(opts->net, page, PAGE_SIZE); | |
619 | } | |
620 | ||
621 | static struct f_phonet_opts_attribute f_phonet_ifname = | |
622 | __CONFIGFS_ATTR_RO(ifname, f_phonet_ifname_show); | |
623 | ||
624 | static struct configfs_attribute *phonet_attrs[] = { | |
625 | &f_phonet_ifname.attr, | |
626 | NULL, | |
627 | }; | |
628 | ||
629 | static struct config_item_type phonet_func_type = { | |
630 | .ct_item_ops = &phonet_item_ops, | |
631 | .ct_attrs = phonet_attrs, | |
632 | .ct_owner = THIS_MODULE, | |
633 | }; | |
634 | ||
fcbdf12e AP |
635 | static void phonet_free_inst(struct usb_function_instance *f) |
636 | { | |
637 | struct f_phonet_opts *opts; | |
638 | ||
639 | opts = container_of(f, struct f_phonet_opts, func_inst); | |
640 | if (opts->bound) | |
641 | gphonet_cleanup(opts->net); | |
642 | else | |
643 | free_netdev(opts->net); | |
644 | kfree(opts); | |
645 | } | |
646 | ||
647 | static struct usb_function_instance *phonet_alloc_inst(void) | |
648 | { | |
649 | struct f_phonet_opts *opts; | |
650 | ||
651 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
652 | if (!opts) | |
653 | return ERR_PTR(-ENOMEM); | |
654 | ||
655 | opts->func_inst.free_func_inst = phonet_free_inst; | |
656 | opts->net = gphonet_setup_default(); | |
3b45b2a2 AP |
657 | if (IS_ERR(opts->net)) { |
658 | struct net_device *net = opts->net; | |
659 | kfree(opts); | |
660 | return ERR_CAST(net); | |
661 | } | |
fcbdf12e | 662 | |
83408745 AP |
663 | config_group_init_type_name(&opts->func_inst.group, "", |
664 | &phonet_func_type); | |
665 | ||
fcbdf12e AP |
666 | return &opts->func_inst; |
667 | } | |
668 | ||
669 | static void phonet_free(struct usb_function *f) | |
670 | { | |
671 | struct f_phonet *phonet; | |
672 | ||
673 | phonet = func_to_pn(f); | |
674 | kfree(phonet); | |
675 | } | |
676 | ||
677 | static void pn_unbind(struct usb_configuration *c, struct usb_function *f) | |
678 | { | |
679 | struct f_phonet *fp = func_to_pn(f); | |
680 | int i; | |
681 | ||
682 | /* We are already disconnected */ | |
683 | if (fp->in_req) | |
684 | usb_ep_free_request(fp->in_ep, fp->in_req); | |
685 | for (i = 0; i < phonet_rxq_size; i++) | |
686 | if (fp->out_reqv[i]) | |
687 | usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); | |
688 | ||
689 | usb_free_all_descriptors(f); | |
690 | } | |
691 | ||
c3af8223 | 692 | static struct usb_function *phonet_alloc(struct usb_function_instance *fi) |
fcbdf12e AP |
693 | { |
694 | struct f_phonet *fp; | |
695 | struct f_phonet_opts *opts; | |
696 | int size; | |
697 | ||
698 | size = sizeof(*fp) + (phonet_rxq_size * sizeof(struct usb_request *)); | |
699 | fp = kzalloc(size, GFP_KERNEL); | |
700 | if (!fp) | |
701 | return ERR_PTR(-ENOMEM); | |
702 | ||
703 | opts = container_of(fi, struct f_phonet_opts, func_inst); | |
704 | ||
705 | fp->dev = opts->net; | |
706 | fp->function.name = "phonet"; | |
707 | fp->function.bind = pn_bind; | |
708 | fp->function.unbind = pn_unbind; | |
709 | fp->function.set_alt = pn_set_alt; | |
710 | fp->function.get_alt = pn_get_alt; | |
711 | fp->function.disable = pn_disconnect; | |
712 | fp->function.free_func = phonet_free; | |
713 | spin_lock_init(&fp->rx.lock); | |
714 | ||
715 | return &fp->function; | |
716 | } | |
717 | ||
718 | struct net_device *gphonet_setup_default(void) | |
719 | { | |
720 | struct net_device *dev; | |
721 | struct phonet_port *port; | |
722 | ||
723 | /* Create net device */ | |
724 | dev = alloc_netdev(sizeof(*port), "upnlink%d", pn_net_setup); | |
725 | if (!dev) | |
726 | return ERR_PTR(-ENOMEM); | |
727 | ||
728 | port = netdev_priv(dev); | |
729 | spin_lock_init(&port->lock); | |
730 | netif_carrier_off(dev); | |
731 | ||
732 | return dev; | |
733 | } | |
734 | ||
735 | void gphonet_set_gadget(struct net_device *net, struct usb_gadget *g) | |
736 | { | |
737 | SET_NETDEV_DEV(net, &g->dev); | |
738 | } | |
739 | ||
740 | int gphonet_register_netdev(struct net_device *net) | |
741 | { | |
742 | int status; | |
743 | ||
744 | status = register_netdev(net); | |
745 | if (status) | |
746 | free_netdev(net); | |
747 | ||
748 | return status; | |
749 | } | |
750 | ||
0189e63a | 751 | void gphonet_cleanup(struct net_device *dev) |
9732d523 RDC |
752 | { |
753 | unregister_netdev(dev); | |
754 | } | |
0383070e AP |
755 | |
756 | DECLARE_USB_FUNCTION_INIT(phonet, phonet_alloc_inst, phonet_alloc); | |
757 | MODULE_AUTHOR("Rémi Denis-Courmont"); | |
758 | MODULE_LICENSE("GPL"); |