Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 1 | /* |
| 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 Axboe | f95d76a | 2010-08-23 12:39:29 +0200 | [diff] [blame] | 61 | #define USB_PRODUCT_IPHONE_4 0x1297 |
Kavan Smith | 02009af | 2011-08-31 05:12:05 +0000 | [diff] [blame] | 62 | #define USB_PRODUCT_IPHONE_4_VZW 0x129c |
Tim Gardner | 72ba009 | 2012-02-15 07:50:15 +0000 | [diff] [blame] | 63 | #define USB_PRODUCT_IPHONE_4S 0x12a0 |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 64 | |
| 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 Hutchings | 9c41294 | 2011-05-03 07:49:25 +0000 | [diff] [blame] | 70 | #define IPHETH_IP_ALIGN 2 /* padding at front of URB */ |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 71 | #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 | |
| 86 | static 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 Axboe | f95d76a | 2010-08-23 12:39:29 +0200 | [diff] [blame] | 99 | { 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 Smith | 02009af | 2011-08-31 05:12:05 +0000 | [diff] [blame] | 103 | { 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 Gardner | 72ba009 | 2012-02-15 07:50:15 +0000 | [diff] [blame] | 107 | { 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 Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 111 | { } |
| 112 | }; |
| 113 | MODULE_DEVICE_TABLE(usb, ipheth_table); |
| 114 | |
| 115 | struct 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 | |
| 130 | static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags); |
| 131 | |
| 132 | static 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 Carpenter | d87ff58 | 2010-04-26 23:20:12 +0000 | [diff] [blame] | 141 | goto error_nomem; |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 142 | |
| 143 | rx_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 144 | if (rx_urb == NULL) |
Dan Carpenter | d87ff58 | 2010-04-26 23:20:12 +0000 | [diff] [blame] | 145 | goto free_tx_urb; |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 146 | |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 147 | tx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE, |
| 148 | GFP_KERNEL, &tx_urb->transfer_dma); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 149 | if (tx_buf == NULL) |
Dan Carpenter | d87ff58 | 2010-04-26 23:20:12 +0000 | [diff] [blame] | 150 | goto free_rx_urb; |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 151 | |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 152 | rx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE, |
| 153 | GFP_KERNEL, &rx_urb->transfer_dma); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 154 | if (rx_buf == NULL) |
Dan Carpenter | d87ff58 | 2010-04-26 23:20:12 +0000 | [diff] [blame] | 155 | goto free_tx_buf; |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 156 | |
| 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 Carpenter | d87ff58 | 2010-04-26 23:20:12 +0000 | [diff] [blame] | 164 | free_tx_buf: |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 165 | usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, tx_buf, |
| 166 | tx_urb->transfer_dma); |
Dan Carpenter | d87ff58 | 2010-04-26 23:20:12 +0000 | [diff] [blame] | 167 | free_rx_urb: |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 168 | usb_free_urb(rx_urb); |
Dan Carpenter | d87ff58 | 2010-04-26 23:20:12 +0000 | [diff] [blame] | 169 | free_tx_urb: |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 170 | usb_free_urb(tx_urb); |
Dan Carpenter | d87ff58 | 2010-04-26 23:20:12 +0000 | [diff] [blame] | 171 | error_nomem: |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 172 | return -ENOMEM; |
| 173 | } |
| 174 | |
| 175 | static void ipheth_free_urbs(struct ipheth_device *iphone) |
| 176 | { |
Daniel Mack | 997ea58 | 2010-04-12 13:17:25 +0200 | [diff] [blame] | 177 | 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 Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 181 | usb_free_urb(iphone->rx_urb); |
| 182 | usb_free_urb(iphone->tx_urb); |
| 183 | } |
| 184 | |
| 185 | static 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 | |
| 191 | static 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-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 212 | dev_err(&dev->intf->dev, "%s: urb status: %d\n", |
| 213 | __func__, status); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 214 | return; |
| 215 | } |
| 216 | |
Ben Hutchings | 9c41294 | 2011-05-03 07:49:25 +0000 | [diff] [blame] | 217 | 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 Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 223 | |
Ben Hutchings | 9c41294 | 2011-05-03 07:49:25 +0000 | [diff] [blame] | 224 | skb = dev_alloc_skb(len); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 225 | if (!skb) { |
Greg Kroah-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 226 | dev_err(&dev->intf->dev, "%s: dev_alloc_skb: -ENOMEM\n", |
| 227 | __func__); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 228 | dev->net->stats.rx_dropped++; |
| 229 | return; |
| 230 | } |
| 231 | |
Ben Hutchings | 9c41294 | 2011-05-03 07:49:25 +0000 | [diff] [blame] | 232 | memcpy(skb_put(skb, len), buf, len); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 233 | 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 | |
| 243 | static void ipheth_sndbulk_callback(struct urb *urb) |
| 244 | { |
| 245 | struct ipheth_device *dev; |
Oliver Neukum | c31fd6c | 2010-07-02 15:51:55 +0200 | [diff] [blame] | 246 | int status = urb->status; |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 247 | |
| 248 | dev = urb->context; |
| 249 | if (dev == NULL) |
| 250 | return; |
| 251 | |
Oliver Neukum | c31fd6c | 2010-07-02 15:51:55 +0200 | [diff] [blame] | 252 | if (status != 0 && |
| 253 | status != -ENOENT && |
| 254 | status != -ECONNRESET && |
| 255 | status != -ESHUTDOWN) |
Greg Kroah-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 256 | dev_err(&dev->intf->dev, "%s: urb status: %d\n", |
| 257 | __func__, status); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 258 | |
| 259 | dev_kfree_skb_irq(dev->tx_skb); |
| 260 | netif_wake_queue(dev->net); |
| 261 | } |
| 262 | |
| 263 | static 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-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 277 | dev_err(&dev->intf->dev, "%s: usb_control_msg: %d\n", |
| 278 | __func__, retval); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 279 | 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 | |
| 290 | static 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 | |
| 299 | static 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-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 315 | dev_err(&dev->intf->dev, "%s: usb_control_msg: %d\n", |
| 316 | __func__, retval); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 317 | } else if (retval < ETH_ALEN) { |
Greg Kroah-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 318 | dev_err(&dev->intf->dev, |
| 319 | "%s: usb_control_msg: short packet: %d bytes\n", |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 320 | __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 | |
| 330 | static 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-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 344 | dev_err(&dev->intf->dev, "%s: usb_submit_urb: %d\n", |
| 345 | __func__, retval); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 346 | return retval; |
| 347 | } |
| 348 | |
| 349 | static 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 | |
| 370 | static 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 | |
| 379 | static 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 Perches | 9c413ed | 2010-10-30 11:08:34 +0000 | [diff] [blame] | 387 | WARN(1, "%s: skb too large: %d bytes\n", __func__, skb->len); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 388 | 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-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 406 | dev_err(&dev->intf->dev, "%s: usb_submit_urb: %d\n", |
| 407 | __func__, retval); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 408 | 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 | |
| 421 | static void ipheth_tx_timeout(struct net_device *net) |
| 422 | { |
| 423 | struct ipheth_device *dev = netdev_priv(net); |
| 424 | |
Greg Kroah-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 425 | dev_err(&dev->intf->dev, "%s: TX timeout\n", __func__); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 426 | dev->net->stats.tx_errors++; |
| 427 | usb_unlink_urb(dev->tx_urb); |
| 428 | } |
| 429 | |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 430 | static 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 hemminger | bc689c9 | 2012-01-05 19:10:23 +0000 | [diff] [blame] | 436 | static const struct ethtool_ops ops = { |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 437 | .get_link = ipheth_ethtool_op_get_link |
| 438 | }; |
| 439 | |
| 440 | static const struct net_device_ops ipheth_netdev_ops = { |
stephen hemminger | 8ef207d | 2011-06-08 08:09:13 +0000 | [diff] [blame] | 441 | .ndo_open = ipheth_open, |
| 442 | .ndo_stop = ipheth_close, |
| 443 | .ndo_start_xmit = ipheth_tx, |
| 444 | .ndo_tx_timeout = ipheth_tx_timeout, |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 445 | }; |
| 446 | |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 447 | static 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 Williams | c9cedbb | 2010-09-08 07:50:47 +0000 | [diff] [blame] | 464 | strcpy(netdev->name, "eth%d"); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 465 | |
| 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-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 475 | dev_err(&intf->dev, "Unable to find alternate settings interface\n"); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 476 | 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-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 488 | dev_err(&intf->dev, "Unable to find endpoints\n"); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 489 | 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-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 506 | dev_err(&intf->dev, "error allocating urbs: %d\n", retval); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 507 | 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 Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 514 | |
| 515 | retval = register_netdev(netdev); |
| 516 | if (retval) { |
Greg Kroah-Hartman | 495f71e | 2012-04-25 12:37:48 -0700 | [diff] [blame] | 517 | dev_err(&intf->dev, "error registering netdev: %d\n", retval); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 518 | 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 | |
| 525 | err_register_netdev: |
| 526 | ipheth_free_urbs(dev); |
| 527 | err_alloc_urbs: |
| 528 | err_get_macaddr: |
| 529 | err_alloc_ctrl_buf: |
| 530 | kfree(dev->ctrl_buf); |
| 531 | err_endpoints: |
| 532 | free_netdev(netdev); |
| 533 | return retval; |
| 534 | } |
| 535 | |
| 536 | static 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 | |
| 552 | static struct usb_driver ipheth_driver = { |
| 553 | .name = "ipheth", |
| 554 | .probe = ipheth_probe, |
| 555 | .disconnect = ipheth_disconnect, |
| 556 | .id_table = ipheth_table, |
Sarah Sharp | e1f12eb | 2012-04-23 10:08:51 -0700 | [diff] [blame] | 557 | .disable_hub_initiated_lpm = 1, |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 558 | }; |
| 559 | |
Greg Kroah-Hartman | d632eb1 | 2011-11-18 09:44:20 -0800 | [diff] [blame] | 560 | module_usb_driver(ipheth_driver); |
Diego Giagio | a19259c | 2010-04-18 08:35:16 +0000 | [diff] [blame] | 561 | |
| 562 | MODULE_AUTHOR("Diego Giagio <diego@giagio.com>"); |
| 563 | MODULE_DESCRIPTION("Apple iPhone USB Ethernet driver"); |
| 564 | MODULE_LICENSE("Dual BSD/GPL"); |