blob: 3490770333383d3d63c08977901b9311ff7cef15 [file] [log] [blame]
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -08001/*
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.
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -080011 */
12
Alexey Dobriyanb7f080c2011-06-16 11:01:34 +000013#include <linux/mm.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -080015#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
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +000030#define MAXPACKET 512
31#if (PAGE_SIZE % MAXPACKET)
32#error MAXPACKET must divide PAGE_SIZE!
33#endif
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -080034
35/*-------------------------------------------------------------------------*/
36
37struct phonet_port {
38 struct f_phonet *usb;
39 spinlock_t lock;
40};
41
42struct f_phonet {
43 struct usb_function function;
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +000044 struct {
45 struct sk_buff *skb;
46 spinlock_t lock;
47 } rx;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -080048 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
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +000055static int phonet_rxq_size = 17;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -080056
57static 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
67static struct usb_interface_descriptor
68pn_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
77static const struct usb_cdc_header_desc
78pn_header_desc = {
79 .bLength = sizeof pn_header_desc,
80 .bDescriptorType = USB_DT_CS_INTERFACE,
81 .bDescriptorSubType = USB_CDC_HEADER_TYPE,
Harvey Harrison551509d2009-02-11 14:11:36 -080082 .bcdCDC = cpu_to_le16(0x0110),
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -080083};
84
85static const struct usb_cdc_header_desc
86pn_phonet_desc = {
87 .bLength = sizeof pn_phonet_desc,
88 .bDescriptorType = USB_DT_CS_INTERFACE,
89 .bDescriptorSubType = USB_CDC_PHONET_TYPE,
Harvey Harrison551509d2009-02-11 14:11:36 -080090 .bcdCDC = cpu_to_le16(0x1505), /* ??? */
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -080091};
92
93static struct usb_cdc_union_desc
94pn_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
103static struct usb_interface_descriptor
104pn_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
114static struct usb_interface_descriptor
115pn_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
125static struct usb_endpoint_descriptor
126pn_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
134static struct usb_endpoint_descriptor
135pn_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,
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000141 .wMaxPacketSize = cpu_to_le16(MAXPACKET),
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800142};
143
144static struct usb_endpoint_descriptor
145pn_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
153static struct usb_endpoint_descriptor
154pn_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,
Harvey Harrison551509d2009-02-11 14:11:36 -0800160 .wMaxPacketSize = cpu_to_le16(512),
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800161};
162
163static 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
175static 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
189static int pn_net_open(struct net_device *dev)
190{
Rémi Denis-Courmontc69367f2009-06-01 01:18:56 +0000191 netif_wake_queue(dev);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800192 return 0;
193}
194
195static int pn_net_close(struct net_device *dev)
196{
197 netif_stop_queue(dev);
198 return 0;
199}
200
201static 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);
Rémi Denis-Courmontc69367f2009-06-01 01:18:56 +0000221 netif_wake_queue(dev);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800222}
223
224static 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
252out_unlock:
253 spin_unlock_irqrestore(&port->lock, flags);
254out:
255 if (unlikely(skb)) {
Rémi Denis-Courmontfa202592009-06-01 01:18:55 +0000256 dev_kfree_skb(skb);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800257 dev->stats.tx_dropped++;
258 }
Patrick McHardy6ed10652009-06-23 06:03:08 +0000259 return NETDEV_TX_OK;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800260}
261
262static int pn_net_mtu(struct net_device *dev, int new_mtu)
263{
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800264 if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU))
265 return -EINVAL;
Rémi Denis-Courmont5da63cc2009-08-06 21:56:43 +0000266 dev->mtu = new_mtu;
267 return 0;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800268}
269
Stephen Hemmingerab638e62009-01-07 17:24:34 -0800270static 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
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800277static 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
Stephen Hemmingerab638e62009-01-07 17:24:34 -0800288 dev->netdev_ops = &pn_netdev_ops;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800289 dev->destructor = free_netdev;
290 dev->header_ops = &phonet_header_ops;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800291}
292
293/*-------------------------------------------------------------------------*/
294
295/*
296 * Queue buffer for data from the host
297 */
298static int
299pn_rx_submit(struct f_phonet *fp, struct usb_request *req, gfp_t gfp_flags)
300{
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000301 struct net_device *dev = fp->dev;
302 struct page *page;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800303 int err;
304
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000305 page = __netdev_alloc_page(dev, gfp_flags);
306 if (!page)
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800307 return -ENOMEM;
308
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000309 req->buf = page_address(page);
310 req->length = PAGE_SIZE;
311 req->context = page;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800312
313 err = usb_ep_queue(fp->out_ep, req, gfp_flags);
314 if (unlikely(err))
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000315 netdev_free_page(dev, page);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800316 return err;
317}
318
319static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req)
320{
321 struct f_phonet *fp = ep->driver_data;
322 struct net_device *dev = fp->dev;
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000323 struct page *page = req->context;
324 struct sk_buff *skb;
325 unsigned long flags;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800326 int status = req->status;
327
328 switch (status) {
329 case 0:
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000330 spin_lock_irqsave(&fp->rx.lock, flags);
331 skb = fp->rx.skb;
332 if (!skb)
333 skb = fp->rx.skb = netdev_alloc_skb(dev, 12);
334 if (req->actual < req->length) /* Last fragment */
335 fp->rx.skb = NULL;
336 spin_unlock_irqrestore(&fp->rx.lock, flags);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800337
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000338 if (unlikely(!skb))
339 break;
Rémi Denis-Courmontf5a45322011-02-23 02:51:33 +0000340
341 if (skb->len == 0) { /* First fragment */
342 skb->protocol = htons(ETH_P_PHONET);
343 skb_reset_mac_header(skb);
344 /* Can't use pskb_pull() on page in IRQ */
345 memcpy(skb_put(skb, 1), page_address(page), 1);
346 }
347
348 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
349 skb->len == 0, req->actual);
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000350 page = NULL;
351
352 if (req->actual < req->length) { /* Last fragment */
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000353 skb->dev = dev;
354 dev->stats.rx_packets++;
355 dev->stats.rx_bytes += skb->len;
356
357 netif_rx(skb);
358 }
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800359 break;
360
361 /* Do not resubmit in these cases: */
362 case -ESHUTDOWN: /* disconnect */
363 case -ECONNABORTED: /* hw reset */
364 case -ECONNRESET: /* dequeued (unlink or netif down) */
365 req = NULL;
366 break;
367
368 /* Do resubmit in these cases: */
369 case -EOVERFLOW: /* request buffer overflow */
370 dev->stats.rx_over_errors++;
371 default:
372 dev->stats.rx_errors++;
373 break;
374 }
375
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000376 if (page)
377 netdev_free_page(dev, page);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800378 if (req)
379 pn_rx_submit(fp, req, GFP_ATOMIC);
380}
381
382/*-------------------------------------------------------------------------*/
383
384static void __pn_reset(struct usb_function *f)
385{
386 struct f_phonet *fp = func_to_pn(f);
387 struct net_device *dev = fp->dev;
388 struct phonet_port *port = netdev_priv(dev);
389
390 netif_carrier_off(dev);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800391 port->usb = NULL;
392
393 usb_ep_disable(fp->out_ep);
394 usb_ep_disable(fp->in_ep);
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000395 if (fp->rx.skb) {
396 dev_kfree_skb_irq(fp->rx.skb);
397 fp->rx.skb = NULL;
398 }
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800399}
400
401static int pn_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
402{
403 struct f_phonet *fp = func_to_pn(f);
404 struct usb_gadget *gadget = fp->function.config->cdev->gadget;
405
406 if (intf == pn_control_intf_desc.bInterfaceNumber)
407 /* control interface, no altsetting */
408 return (alt > 0) ? -EINVAL : 0;
409
410 if (intf == pn_data_intf_desc.bInterfaceNumber) {
411 struct net_device *dev = fp->dev;
412 struct phonet_port *port = netdev_priv(dev);
413
414 /* data intf (0: inactive, 1: active) */
415 if (alt > 1)
416 return -EINVAL;
417
418 spin_lock(&port->lock);
419 __pn_reset(f);
420 if (alt == 1) {
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800421 int i;
422
Tatyana Brokhmanea2a1df2011-06-28 16:33:50 +0300423 if (config_ep_by_speed(gadget, f, fp->in_ep) ||
424 config_ep_by_speed(gadget, f, fp->out_ep)) {
425 fp->in_ep->desc = NULL;
426 fp->out_ep->desc = NULL;
Sebastian Andrzej Siewiorbb8070c2011-08-05 22:14:46 +0200427 spin_unlock(&port->lock);
Tatyana Brokhmanea2a1df2011-06-28 16:33:50 +0300428 return -EINVAL;
429 }
Tatyana Brokhman72c973d2011-06-28 16:33:48 +0300430 usb_ep_enable(fp->out_ep);
431 usb_ep_enable(fp->in_ep);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800432
433 port->usb = fp;
434 fp->out_ep->driver_data = fp;
435 fp->in_ep->driver_data = fp;
436
437 netif_carrier_on(dev);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800438 for (i = 0; i < phonet_rxq_size; i++)
439 pn_rx_submit(fp, fp->out_reqv[i], GFP_ATOMIC);
440 }
441 spin_unlock(&port->lock);
442 return 0;
443 }
444
445 return -EINVAL;
446}
447
448static int pn_get_alt(struct usb_function *f, unsigned intf)
449{
450 struct f_phonet *fp = func_to_pn(f);
451
452 if (intf == pn_control_intf_desc.bInterfaceNumber)
453 return 0;
454
455 if (intf == pn_data_intf_desc.bInterfaceNumber) {
456 struct phonet_port *port = netdev_priv(fp->dev);
457 u8 alt;
458
459 spin_lock(&port->lock);
460 alt = port->usb != NULL;
461 spin_unlock(&port->lock);
462 return alt;
463 }
464
465 return -EINVAL;
466}
467
468static void pn_disconnect(struct usb_function *f)
469{
470 struct f_phonet *fp = func_to_pn(f);
471 struct phonet_port *port = netdev_priv(fp->dev);
472 unsigned long flags;
473
474 /* remain disabled until set_alt */
475 spin_lock_irqsave(&port->lock, flags);
476 __pn_reset(f);
477 spin_unlock_irqrestore(&port->lock, flags);
478}
479
480/*-------------------------------------------------------------------------*/
481
482static __init
483int pn_bind(struct usb_configuration *c, struct usb_function *f)
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
491 /* Reserve interface IDs */
492 status = usb_interface_id(c, f);
493 if (status < 0)
494 goto err;
495 pn_control_intf_desc.bInterfaceNumber = status;
496 pn_union_desc.bMasterInterface0 = status;
497
498 status = usb_interface_id(c, f);
499 if (status < 0)
500 goto err;
501 pn_data_nop_intf_desc.bInterfaceNumber = status;
502 pn_data_intf_desc.bInterfaceNumber = status;
503 pn_union_desc.bSlaveInterface0 = status;
504
505 /* Reserve endpoints */
506 status = -ENODEV;
507 ep = usb_ep_autoconfig(gadget, &pn_fs_sink_desc);
508 if (!ep)
509 goto err;
510 fp->out_ep = ep;
511 ep->driver_data = fp; /* Claim */
512
513 ep = usb_ep_autoconfig(gadget, &pn_fs_source_desc);
514 if (!ep)
515 goto err;
516 fp->in_ep = ep;
517 ep->driver_data = fp; /* Claim */
518
519 pn_hs_sink_desc.bEndpointAddress =
520 pn_fs_sink_desc.bEndpointAddress;
521 pn_hs_source_desc.bEndpointAddress =
522 pn_fs_source_desc.bEndpointAddress;
523
524 /* Do not try to bind Phonet twice... */
525 fp->function.descriptors = fs_pn_function;
526 fp->function.hs_descriptors = hs_pn_function;
527
528 /* Incoming USB requests */
529 status = -ENOMEM;
530 for (i = 0; i < phonet_rxq_size; i++) {
531 struct usb_request *req;
532
533 req = usb_ep_alloc_request(fp->out_ep, GFP_KERNEL);
534 if (!req)
535 goto err;
536
537 req->complete = pn_rx_complete;
538 fp->out_reqv[i] = req;
539 }
540
541 /* Outgoing USB requests */
542 fp->in_req = usb_ep_alloc_request(fp->in_ep, GFP_KERNEL);
543 if (!fp->in_req)
544 goto err;
545
546 INFO(cdev, "USB CDC Phonet function\n");
547 INFO(cdev, "using %s, OUT %s, IN %s\n", cdev->gadget->name,
548 fp->out_ep->name, fp->in_ep->name);
549 return 0;
550
551err:
552 if (fp->out_ep)
553 fp->out_ep->driver_data = NULL;
554 if (fp->in_ep)
555 fp->in_ep->driver_data = NULL;
556 ERROR(cdev, "USB CDC Phonet: cannot autoconfigure\n");
557 return status;
558}
559
560static void
561pn_unbind(struct usb_configuration *c, struct usb_function *f)
562{
563 struct f_phonet *fp = func_to_pn(f);
564 int i;
565
566 /* We are already disconnected */
567 if (fp->in_req)
568 usb_ep_free_request(fp->in_ep, fp->in_req);
569 for (i = 0; i < phonet_rxq_size; i++)
570 if (fp->out_reqv[i])
571 usb_ep_free_request(fp->out_ep, fp->out_reqv[i]);
572
573 kfree(fp);
574}
575
576/*-------------------------------------------------------------------------*/
577
578static struct net_device *dev;
579
580int __init phonet_bind_config(struct usb_configuration *c)
581{
582 struct f_phonet *fp;
Rémi Denis-Courmontb61b8af2009-06-01 01:18:57 +0000583 int err, size;
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800584
Rémi Denis-Courmontb61b8af2009-06-01 01:18:57 +0000585 size = sizeof(*fp) + (phonet_rxq_size * sizeof(struct usb_request *));
586 fp = kzalloc(size, GFP_KERNEL);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800587 if (!fp)
588 return -ENOMEM;
589
590 fp->dev = dev;
591 fp->function.name = "phonet";
592 fp->function.bind = pn_bind;
593 fp->function.unbind = pn_unbind;
594 fp->function.set_alt = pn_set_alt;
595 fp->function.get_alt = pn_get_alt;
596 fp->function.disable = pn_disconnect;
Rémi Denis-Courmontb91cd142009-08-06 21:56:44 +0000597 spin_lock_init(&fp->rx.lock);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800598
599 err = usb_add_function(c, &fp->function);
600 if (err)
601 kfree(fp);
602 return err;
603}
604
605int __init gphonet_setup(struct usb_gadget *gadget)
606{
607 struct phonet_port *port;
608 int err;
609
610 /* Create net device */
611 BUG_ON(dev);
Rémi Denis-Courmontb61b8af2009-06-01 01:18:57 +0000612 dev = alloc_netdev(sizeof(*port), "upnlink%d", pn_net_setup);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800613 if (!dev)
614 return -ENOMEM;
615
616 port = netdev_priv(dev);
617 spin_lock_init(&port->lock);
618 netif_carrier_off(dev);
Rémi Denis-Courmont9732d522008-12-17 15:49:09 -0800619 SET_NETDEV_DEV(dev, &gadget->dev);
620
621 err = register_netdev(dev);
622 if (err)
623 free_netdev(dev);
624 return err;
625}
626
627void gphonet_cleanup(void)
628{
629 unregister_netdev(dev);
630}