blob: 32519e5a7b97157a347365dcdcac1c29505bb42b [file] [log] [blame]
Diego Giagioa19259c2010-04-18 08:35:16 +00001/*
2 * ipheth.c - Apple iPhone USB Ethernet driver
3 *
4 * Copyright (c) 2009 Diego Giagio <diego@giagio.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of GIAGIO.COM nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * Alternatively, provided that this notice is retained in full, this
20 * software may be distributed under the terms of the GNU General
21 * Public License ("GPL") version 2, in which case the provisions of the
22 * GPL apply INSTEAD OF those given above.
23 *
24 * The provided data structures and external interfaces from this code
25 * are not restricted to be used by modules with a GPL compatible license.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
38 * DAMAGE.
39 *
40 *
41 * Attention: iPhone device must be paired, otherwise it won't respond to our
42 * driver. For more info: http://giagio.com/wiki/moin.cgi/iPhoneEthernetDriver
43 *
44 */
45
46#include <linux/kernel.h>
47#include <linux/errno.h>
48#include <linux/init.h>
49#include <linux/slab.h>
50#include <linux/module.h>
51#include <linux/netdevice.h>
52#include <linux/etherdevice.h>
53#include <linux/ethtool.h>
54#include <linux/usb.h>
55#include <linux/workqueue.h>
56
57#define USB_VENDOR_APPLE 0x05ac
58#define USB_PRODUCT_IPHONE 0x1290
59#define USB_PRODUCT_IPHONE_3G 0x1292
60#define USB_PRODUCT_IPHONE_3GS 0x1294
Jens Axboef95d76a2010-08-23 12:39:29 +020061#define USB_PRODUCT_IPHONE_4 0x1297
Kavan Smith02009af2011-08-31 05:12:05 +000062#define USB_PRODUCT_IPHONE_4_VZW 0x129c
Tim Gardner72ba0092012-02-15 07:50:15 +000063#define USB_PRODUCT_IPHONE_4S 0x12a0
Diego Giagioa19259c2010-04-18 08:35:16 +000064
65#define IPHETH_USBINTF_CLASS 255
66#define IPHETH_USBINTF_SUBCLASS 253
67#define IPHETH_USBINTF_PROTO 1
68
69#define IPHETH_BUF_SIZE 1516
Ben Hutchings9c412942011-05-03 07:49:25 +000070#define IPHETH_IP_ALIGN 2 /* padding at front of URB */
Diego Giagioa19259c2010-04-18 08:35:16 +000071#define IPHETH_TX_TIMEOUT (5 * HZ)
72
73#define IPHETH_INTFNUM 2
74#define IPHETH_ALT_INTFNUM 1
75
76#define IPHETH_CTRL_ENDP 0x00
77#define IPHETH_CTRL_BUF_SIZE 0x40
78#define IPHETH_CTRL_TIMEOUT (5 * HZ)
79
80#define IPHETH_CMD_GET_MACADDR 0x00
81#define IPHETH_CMD_CARRIER_CHECK 0x45
82
83#define IPHETH_CARRIER_CHECK_TIMEOUT round_jiffies_relative(1 * HZ)
84#define IPHETH_CARRIER_ON 0x04
85
86static struct usb_device_id ipheth_table[] = {
87 { USB_DEVICE_AND_INTERFACE_INFO(
88 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE,
89 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
90 IPHETH_USBINTF_PROTO) },
91 { USB_DEVICE_AND_INTERFACE_INFO(
92 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_3G,
93 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
94 IPHETH_USBINTF_PROTO) },
95 { USB_DEVICE_AND_INTERFACE_INFO(
96 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_3GS,
97 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
98 IPHETH_USBINTF_PROTO) },
Jens Axboef95d76a2010-08-23 12:39:29 +020099 { USB_DEVICE_AND_INTERFACE_INFO(
100 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_4,
101 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
102 IPHETH_USBINTF_PROTO) },
Kavan Smith02009af2011-08-31 05:12:05 +0000103 { USB_DEVICE_AND_INTERFACE_INFO(
104 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_4_VZW,
105 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
106 IPHETH_USBINTF_PROTO) },
Tim Gardner72ba0092012-02-15 07:50:15 +0000107 { USB_DEVICE_AND_INTERFACE_INFO(
108 USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_4S,
109 IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
110 IPHETH_USBINTF_PROTO) },
Diego Giagioa19259c2010-04-18 08:35:16 +0000111 { }
112};
113MODULE_DEVICE_TABLE(usb, ipheth_table);
114
115struct ipheth_device {
116 struct usb_device *udev;
117 struct usb_interface *intf;
118 struct net_device *net;
119 struct sk_buff *tx_skb;
120 struct urb *tx_urb;
121 struct urb *rx_urb;
122 unsigned char *tx_buf;
123 unsigned char *rx_buf;
124 unsigned char *ctrl_buf;
125 u8 bulk_in;
126 u8 bulk_out;
127 struct delayed_work carrier_work;
128};
129
130static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags);
131
132static int ipheth_alloc_urbs(struct ipheth_device *iphone)
133{
134 struct urb *tx_urb = NULL;
135 struct urb *rx_urb = NULL;
136 u8 *tx_buf = NULL;
137 u8 *rx_buf = NULL;
138
139 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
140 if (tx_urb == NULL)
Dan Carpenterd87ff582010-04-26 23:20:12 +0000141 goto error_nomem;
Diego Giagioa19259c2010-04-18 08:35:16 +0000142
143 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
144 if (rx_urb == NULL)
Dan Carpenterd87ff582010-04-26 23:20:12 +0000145 goto free_tx_urb;
Diego Giagioa19259c2010-04-18 08:35:16 +0000146
Daniel Mack997ea582010-04-12 13:17:25 +0200147 tx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE,
148 GFP_KERNEL, &tx_urb->transfer_dma);
Diego Giagioa19259c2010-04-18 08:35:16 +0000149 if (tx_buf == NULL)
Dan Carpenterd87ff582010-04-26 23:20:12 +0000150 goto free_rx_urb;
Diego Giagioa19259c2010-04-18 08:35:16 +0000151
Daniel Mack997ea582010-04-12 13:17:25 +0200152 rx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE,
153 GFP_KERNEL, &rx_urb->transfer_dma);
Diego Giagioa19259c2010-04-18 08:35:16 +0000154 if (rx_buf == NULL)
Dan Carpenterd87ff582010-04-26 23:20:12 +0000155 goto free_tx_buf;
Diego Giagioa19259c2010-04-18 08:35:16 +0000156
157
158 iphone->tx_urb = tx_urb;
159 iphone->rx_urb = rx_urb;
160 iphone->tx_buf = tx_buf;
161 iphone->rx_buf = rx_buf;
162 return 0;
163
Dan Carpenterd87ff582010-04-26 23:20:12 +0000164free_tx_buf:
Daniel Mack997ea582010-04-12 13:17:25 +0200165 usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, tx_buf,
166 tx_urb->transfer_dma);
Dan Carpenterd87ff582010-04-26 23:20:12 +0000167free_rx_urb:
Diego Giagioa19259c2010-04-18 08:35:16 +0000168 usb_free_urb(rx_urb);
Dan Carpenterd87ff582010-04-26 23:20:12 +0000169free_tx_urb:
Diego Giagioa19259c2010-04-18 08:35:16 +0000170 usb_free_urb(tx_urb);
Dan Carpenterd87ff582010-04-26 23:20:12 +0000171error_nomem:
Diego Giagioa19259c2010-04-18 08:35:16 +0000172 return -ENOMEM;
173}
174
175static void ipheth_free_urbs(struct ipheth_device *iphone)
176{
Daniel Mack997ea582010-04-12 13:17:25 +0200177 usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, iphone->rx_buf,
178 iphone->rx_urb->transfer_dma);
179 usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, iphone->tx_buf,
180 iphone->tx_urb->transfer_dma);
Diego Giagioa19259c2010-04-18 08:35:16 +0000181 usb_free_urb(iphone->rx_urb);
182 usb_free_urb(iphone->tx_urb);
183}
184
185static void ipheth_kill_urbs(struct ipheth_device *dev)
186{
187 usb_kill_urb(dev->tx_urb);
188 usb_kill_urb(dev->rx_urb);
189}
190
191static void ipheth_rcvbulk_callback(struct urb *urb)
192{
193 struct ipheth_device *dev;
194 struct sk_buff *skb;
195 int status;
196 char *buf;
197 int len;
198
199 dev = urb->context;
200 if (dev == NULL)
201 return;
202
203 status = urb->status;
204 switch (status) {
205 case -ENOENT:
206 case -ECONNRESET:
207 case -ESHUTDOWN:
208 return;
209 case 0:
210 break;
211 default:
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700212 dev_err(&dev->intf->dev, "%s: urb status: %d\n",
213 __func__, status);
Diego Giagioa19259c2010-04-18 08:35:16 +0000214 return;
215 }
216
Ben Hutchings9c412942011-05-03 07:49:25 +0000217 if (urb->actual_length <= IPHETH_IP_ALIGN) {
218 dev->net->stats.rx_length_errors++;
219 return;
220 }
221 len = urb->actual_length - IPHETH_IP_ALIGN;
222 buf = urb->transfer_buffer + IPHETH_IP_ALIGN;
Diego Giagioa19259c2010-04-18 08:35:16 +0000223
Ben Hutchings9c412942011-05-03 07:49:25 +0000224 skb = dev_alloc_skb(len);
Diego Giagioa19259c2010-04-18 08:35:16 +0000225 if (!skb) {
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700226 dev_err(&dev->intf->dev, "%s: dev_alloc_skb: -ENOMEM\n",
227 __func__);
Diego Giagioa19259c2010-04-18 08:35:16 +0000228 dev->net->stats.rx_dropped++;
229 return;
230 }
231
Ben Hutchings9c412942011-05-03 07:49:25 +0000232 memcpy(skb_put(skb, len), buf, len);
Diego Giagioa19259c2010-04-18 08:35:16 +0000233 skb->dev = dev->net;
234 skb->protocol = eth_type_trans(skb, dev->net);
235
236 dev->net->stats.rx_packets++;
237 dev->net->stats.rx_bytes += len;
238
239 netif_rx(skb);
240 ipheth_rx_submit(dev, GFP_ATOMIC);
241}
242
243static void ipheth_sndbulk_callback(struct urb *urb)
244{
245 struct ipheth_device *dev;
Oliver Neukumc31fd6c2010-07-02 15:51:55 +0200246 int status = urb->status;
Diego Giagioa19259c2010-04-18 08:35:16 +0000247
248 dev = urb->context;
249 if (dev == NULL)
250 return;
251
Oliver Neukumc31fd6c2010-07-02 15:51:55 +0200252 if (status != 0 &&
253 status != -ENOENT &&
254 status != -ECONNRESET &&
255 status != -ESHUTDOWN)
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700256 dev_err(&dev->intf->dev, "%s: urb status: %d\n",
257 __func__, status);
Diego Giagioa19259c2010-04-18 08:35:16 +0000258
259 dev_kfree_skb_irq(dev->tx_skb);
260 netif_wake_queue(dev->net);
261}
262
263static int ipheth_carrier_set(struct ipheth_device *dev)
264{
265 struct usb_device *udev = dev->udev;
266 int retval;
267
268 retval = usb_control_msg(udev,
269 usb_rcvctrlpipe(udev, IPHETH_CTRL_ENDP),
270 IPHETH_CMD_CARRIER_CHECK, /* request */
271 0xc0, /* request type */
272 0x00, /* value */
273 0x02, /* index */
274 dev->ctrl_buf, IPHETH_CTRL_BUF_SIZE,
275 IPHETH_CTRL_TIMEOUT);
276 if (retval < 0) {
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700277 dev_err(&dev->intf->dev, "%s: usb_control_msg: %d\n",
278 __func__, retval);
Diego Giagioa19259c2010-04-18 08:35:16 +0000279 return retval;
280 }
281
282 if (dev->ctrl_buf[0] == IPHETH_CARRIER_ON)
283 netif_carrier_on(dev->net);
284 else
285 netif_carrier_off(dev->net);
286
287 return 0;
288}
289
290static void ipheth_carrier_check_work(struct work_struct *work)
291{
292 struct ipheth_device *dev = container_of(work, struct ipheth_device,
293 carrier_work.work);
294
295 ipheth_carrier_set(dev);
296 schedule_delayed_work(&dev->carrier_work, IPHETH_CARRIER_CHECK_TIMEOUT);
297}
298
299static int ipheth_get_macaddr(struct ipheth_device *dev)
300{
301 struct usb_device *udev = dev->udev;
302 struct net_device *net = dev->net;
303 int retval;
304
305 retval = usb_control_msg(udev,
306 usb_rcvctrlpipe(udev, IPHETH_CTRL_ENDP),
307 IPHETH_CMD_GET_MACADDR, /* request */
308 0xc0, /* request type */
309 0x00, /* value */
310 0x02, /* index */
311 dev->ctrl_buf,
312 IPHETH_CTRL_BUF_SIZE,
313 IPHETH_CTRL_TIMEOUT);
314 if (retval < 0) {
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700315 dev_err(&dev->intf->dev, "%s: usb_control_msg: %d\n",
316 __func__, retval);
Diego Giagioa19259c2010-04-18 08:35:16 +0000317 } else if (retval < ETH_ALEN) {
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700318 dev_err(&dev->intf->dev,
319 "%s: usb_control_msg: short packet: %d bytes\n",
Diego Giagioa19259c2010-04-18 08:35:16 +0000320 __func__, retval);
321 retval = -EINVAL;
322 } else {
323 memcpy(net->dev_addr, dev->ctrl_buf, ETH_ALEN);
324 retval = 0;
325 }
326
327 return retval;
328}
329
330static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags)
331{
332 struct usb_device *udev = dev->udev;
333 int retval;
334
335 usb_fill_bulk_urb(dev->rx_urb, udev,
336 usb_rcvbulkpipe(udev, dev->bulk_in),
337 dev->rx_buf, IPHETH_BUF_SIZE,
338 ipheth_rcvbulk_callback,
339 dev);
340 dev->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
341
342 retval = usb_submit_urb(dev->rx_urb, mem_flags);
343 if (retval)
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700344 dev_err(&dev->intf->dev, "%s: usb_submit_urb: %d\n",
345 __func__, retval);
Diego Giagioa19259c2010-04-18 08:35:16 +0000346 return retval;
347}
348
349static int ipheth_open(struct net_device *net)
350{
351 struct ipheth_device *dev = netdev_priv(net);
352 struct usb_device *udev = dev->udev;
353 int retval = 0;
354
355 usb_set_interface(udev, IPHETH_INTFNUM, IPHETH_ALT_INTFNUM);
356
357 retval = ipheth_carrier_set(dev);
358 if (retval)
359 return retval;
360
361 retval = ipheth_rx_submit(dev, GFP_KERNEL);
362 if (retval)
363 return retval;
364
365 schedule_delayed_work(&dev->carrier_work, IPHETH_CARRIER_CHECK_TIMEOUT);
366 netif_start_queue(net);
367 return retval;
368}
369
370static int ipheth_close(struct net_device *net)
371{
372 struct ipheth_device *dev = netdev_priv(net);
373
374 cancel_delayed_work_sync(&dev->carrier_work);
375 netif_stop_queue(net);
376 return 0;
377}
378
379static int ipheth_tx(struct sk_buff *skb, struct net_device *net)
380{
381 struct ipheth_device *dev = netdev_priv(net);
382 struct usb_device *udev = dev->udev;
383 int retval;
384
385 /* Paranoid */
386 if (skb->len > IPHETH_BUF_SIZE) {
Joe Perches9c413ed2010-10-30 11:08:34 +0000387 WARN(1, "%s: skb too large: %d bytes\n", __func__, skb->len);
Diego Giagioa19259c2010-04-18 08:35:16 +0000388 dev->net->stats.tx_dropped++;
389 dev_kfree_skb_irq(skb);
390 return NETDEV_TX_OK;
391 }
392
393 memcpy(dev->tx_buf, skb->data, skb->len);
394 if (skb->len < IPHETH_BUF_SIZE)
395 memset(dev->tx_buf + skb->len, 0, IPHETH_BUF_SIZE - skb->len);
396
397 usb_fill_bulk_urb(dev->tx_urb, udev,
398 usb_sndbulkpipe(udev, dev->bulk_out),
399 dev->tx_buf, IPHETH_BUF_SIZE,
400 ipheth_sndbulk_callback,
401 dev);
402 dev->tx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
403
404 retval = usb_submit_urb(dev->tx_urb, GFP_ATOMIC);
405 if (retval) {
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700406 dev_err(&dev->intf->dev, "%s: usb_submit_urb: %d\n",
407 __func__, retval);
Diego Giagioa19259c2010-04-18 08:35:16 +0000408 dev->net->stats.tx_errors++;
409 dev_kfree_skb_irq(skb);
410 } else {
411 dev->tx_skb = skb;
412
413 dev->net->stats.tx_packets++;
414 dev->net->stats.tx_bytes += skb->len;
415 netif_stop_queue(net);
416 }
417
418 return NETDEV_TX_OK;
419}
420
421static void ipheth_tx_timeout(struct net_device *net)
422{
423 struct ipheth_device *dev = netdev_priv(net);
424
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700425 dev_err(&dev->intf->dev, "%s: TX timeout\n", __func__);
Diego Giagioa19259c2010-04-18 08:35:16 +0000426 dev->net->stats.tx_errors++;
427 usb_unlink_urb(dev->tx_urb);
428}
429
Diego Giagioa19259c2010-04-18 08:35:16 +0000430static u32 ipheth_ethtool_op_get_link(struct net_device *net)
431{
432 struct ipheth_device *dev = netdev_priv(net);
433 return netif_carrier_ok(dev->net);
434}
435
stephen hemmingerbc689c92012-01-05 19:10:23 +0000436static const struct ethtool_ops ops = {
Diego Giagioa19259c2010-04-18 08:35:16 +0000437 .get_link = ipheth_ethtool_op_get_link
438};
439
440static const struct net_device_ops ipheth_netdev_ops = {
stephen hemminger8ef207d2011-06-08 08:09:13 +0000441 .ndo_open = ipheth_open,
442 .ndo_stop = ipheth_close,
443 .ndo_start_xmit = ipheth_tx,
444 .ndo_tx_timeout = ipheth_tx_timeout,
Diego Giagioa19259c2010-04-18 08:35:16 +0000445};
446
Diego Giagioa19259c2010-04-18 08:35:16 +0000447static int ipheth_probe(struct usb_interface *intf,
448 const struct usb_device_id *id)
449{
450 struct usb_device *udev = interface_to_usbdev(intf);
451 struct usb_host_interface *hintf;
452 struct usb_endpoint_descriptor *endp;
453 struct ipheth_device *dev;
454 struct net_device *netdev;
455 int i;
456 int retval;
457
458 netdev = alloc_etherdev(sizeof(struct ipheth_device));
459 if (!netdev)
460 return -ENOMEM;
461
462 netdev->netdev_ops = &ipheth_netdev_ops;
463 netdev->watchdog_timeo = IPHETH_TX_TIMEOUT;
Dan Williamsc9cedbb2010-09-08 07:50:47 +0000464 strcpy(netdev->name, "eth%d");
Diego Giagioa19259c2010-04-18 08:35:16 +0000465
466 dev = netdev_priv(netdev);
467 dev->udev = udev;
468 dev->net = netdev;
469 dev->intf = intf;
470
471 /* Set up endpoints */
472 hintf = usb_altnum_to_altsetting(intf, IPHETH_ALT_INTFNUM);
473 if (hintf == NULL) {
474 retval = -ENODEV;
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700475 dev_err(&intf->dev, "Unable to find alternate settings interface\n");
Diego Giagioa19259c2010-04-18 08:35:16 +0000476 goto err_endpoints;
477 }
478
479 for (i = 0; i < hintf->desc.bNumEndpoints; i++) {
480 endp = &hintf->endpoint[i].desc;
481 if (usb_endpoint_is_bulk_in(endp))
482 dev->bulk_in = endp->bEndpointAddress;
483 else if (usb_endpoint_is_bulk_out(endp))
484 dev->bulk_out = endp->bEndpointAddress;
485 }
486 if (!(dev->bulk_in && dev->bulk_out)) {
487 retval = -ENODEV;
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700488 dev_err(&intf->dev, "Unable to find endpoints\n");
Diego Giagioa19259c2010-04-18 08:35:16 +0000489 goto err_endpoints;
490 }
491
492 dev->ctrl_buf = kmalloc(IPHETH_CTRL_BUF_SIZE, GFP_KERNEL);
493 if (dev->ctrl_buf == NULL) {
494 retval = -ENOMEM;
495 goto err_alloc_ctrl_buf;
496 }
497
498 retval = ipheth_get_macaddr(dev);
499 if (retval)
500 goto err_get_macaddr;
501
502 INIT_DELAYED_WORK(&dev->carrier_work, ipheth_carrier_check_work);
503
504 retval = ipheth_alloc_urbs(dev);
505 if (retval) {
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700506 dev_err(&intf->dev, "error allocating urbs: %d\n", retval);
Diego Giagioa19259c2010-04-18 08:35:16 +0000507 goto err_alloc_urbs;
508 }
509
510 usb_set_intfdata(intf, dev);
511
512 SET_NETDEV_DEV(netdev, &intf->dev);
513 SET_ETHTOOL_OPS(netdev, &ops);
Diego Giagioa19259c2010-04-18 08:35:16 +0000514
515 retval = register_netdev(netdev);
516 if (retval) {
Greg Kroah-Hartman495f71e2012-04-25 12:37:48 -0700517 dev_err(&intf->dev, "error registering netdev: %d\n", retval);
Diego Giagioa19259c2010-04-18 08:35:16 +0000518 retval = -EIO;
519 goto err_register_netdev;
520 }
521
522 dev_info(&intf->dev, "Apple iPhone USB Ethernet device attached\n");
523 return 0;
524
525err_register_netdev:
526 ipheth_free_urbs(dev);
527err_alloc_urbs:
528err_get_macaddr:
529err_alloc_ctrl_buf:
530 kfree(dev->ctrl_buf);
531err_endpoints:
532 free_netdev(netdev);
533 return retval;
534}
535
536static void ipheth_disconnect(struct usb_interface *intf)
537{
538 struct ipheth_device *dev;
539
540 dev = usb_get_intfdata(intf);
541 if (dev != NULL) {
542 unregister_netdev(dev->net);
543 ipheth_kill_urbs(dev);
544 ipheth_free_urbs(dev);
545 kfree(dev->ctrl_buf);
546 free_netdev(dev->net);
547 }
548 usb_set_intfdata(intf, NULL);
549 dev_info(&intf->dev, "Apple iPhone USB Ethernet now disconnected\n");
550}
551
552static struct usb_driver ipheth_driver = {
553 .name = "ipheth",
554 .probe = ipheth_probe,
555 .disconnect = ipheth_disconnect,
556 .id_table = ipheth_table,
557};
558
Greg Kroah-Hartmand632eb12011-11-18 09:44:20 -0800559module_usb_driver(ipheth_driver);
Diego Giagioa19259c2010-04-18 08:35:16 +0000560
561MODULE_AUTHOR("Diego Giagio <diego@giagio.com>");
562MODULE_DESCRIPTION("Apple iPhone USB Ethernet driver");
563MODULE_LICENSE("Dual BSD/GPL");