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|
/*
* ipheth.c - Apple iPhone USB Ethernet driver
*
* Copyright (c) 2009 Diego Giagio <diego@giagio.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of GIAGIO.COM nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* Alternatively, provided that this notice is retained in full, this
* software may be distributed under the terms of the GNU General
* Public License ("GPL") version 2, in which case the provisions of the
* GPL apply INSTEAD OF those given above.
*
* The provided data structures and external interfaces from this code
* are not restricted to be used by modules with a GPL compatible license.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*
* Attention: iPhone device must be paired, otherwise it won't respond to our
* driver. For more info: http://giagio.com/wiki/moin.cgi/iPhoneEthernetDriver
*
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/usb.h>
#include <linux/workqueue.h>
#define USB_VENDOR_APPLE 0x05ac
#define USB_PRODUCT_IPHONE 0x1290
#define USB_PRODUCT_IPHONE_3G 0x1292
#define USB_PRODUCT_IPHONE_3GS 0x1294
#define USB_PRODUCT_IPHONE_4 0x1297
#define IPHETH_USBINTF_CLASS 255
#define IPHETH_USBINTF_SUBCLASS 253
#define IPHETH_USBINTF_PROTO 1
#define IPHETH_BUF_SIZE 1516
#define IPHETH_TX_TIMEOUT (5 * HZ)
#define IPHETH_INTFNUM 2
#define IPHETH_ALT_INTFNUM 1
#define IPHETH_CTRL_ENDP 0x00
#define IPHETH_CTRL_BUF_SIZE 0x40
#define IPHETH_CTRL_TIMEOUT (5 * HZ)
#define IPHETH_CMD_GET_MACADDR 0x00
#define IPHETH_CMD_CARRIER_CHECK 0x45
#define IPHETH_CARRIER_CHECK_TIMEOUT round_jiffies_relative(1 * HZ)
#define IPHETH_CARRIER_ON 0x04
static struct usb_device_id ipheth_table[] = {
{ USB_DEVICE_AND_INTERFACE_INFO(
USB_VENDOR_APPLE, USB_PRODUCT_IPHONE,
IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
IPHETH_USBINTF_PROTO) },
{ USB_DEVICE_AND_INTERFACE_INFO(
USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_3G,
IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
IPHETH_USBINTF_PROTO) },
{ USB_DEVICE_AND_INTERFACE_INFO(
USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_3GS,
IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
IPHETH_USBINTF_PROTO) },
{ USB_DEVICE_AND_INTERFACE_INFO(
USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_4,
IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
IPHETH_USBINTF_PROTO) },
{ }
};
MODULE_DEVICE_TABLE(usb, ipheth_table);
struct ipheth_device {
struct usb_device *udev;
struct usb_interface *intf;
struct net_device *net;
struct sk_buff *tx_skb;
struct urb *tx_urb;
struct urb *rx_urb;
unsigned char *tx_buf;
unsigned char *rx_buf;
unsigned char *ctrl_buf;
u8 bulk_in;
u8 bulk_out;
struct delayed_work carrier_work;
};
static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags);
static int ipheth_alloc_urbs(struct ipheth_device *iphone)
{
struct urb *tx_urb = NULL;
struct urb *rx_urb = NULL;
u8 *tx_buf = NULL;
u8 *rx_buf = NULL;
tx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (tx_urb == NULL)
goto error_nomem;
rx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (rx_urb == NULL)
goto free_tx_urb;
tx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE,
GFP_KERNEL, &tx_urb->transfer_dma);
if (tx_buf == NULL)
goto free_rx_urb;
rx_buf = usb_alloc_coherent(iphone->udev, IPHETH_BUF_SIZE,
GFP_KERNEL, &rx_urb->transfer_dma);
if (rx_buf == NULL)
goto free_tx_buf;
iphone->tx_urb = tx_urb;
iphone->rx_urb = rx_urb;
iphone->tx_buf = tx_buf;
iphone->rx_buf = rx_buf;
return 0;
free_tx_buf:
usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, tx_buf,
tx_urb->transfer_dma);
free_rx_urb:
usb_free_urb(rx_urb);
free_tx_urb:
usb_free_urb(tx_urb);
error_nomem:
return -ENOMEM;
}
static void ipheth_free_urbs(struct ipheth_device *iphone)
{
usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, iphone->rx_buf,
iphone->rx_urb->transfer_dma);
usb_free_coherent(iphone->udev, IPHETH_BUF_SIZE, iphone->tx_buf,
iphone->tx_urb->transfer_dma);
usb_free_urb(iphone->rx_urb);
usb_free_urb(iphone->tx_urb);
}
static void ipheth_kill_urbs(struct ipheth_device *dev)
{
usb_kill_urb(dev->tx_urb);
usb_kill_urb(dev->rx_urb);
}
static void ipheth_rcvbulk_callback(struct urb *urb)
{
struct ipheth_device *dev;
struct sk_buff *skb;
int status;
char *buf;
int len;
dev = urb->context;
if (dev == NULL)
return;
status = urb->status;
switch (status) {
case -ENOENT:
case -ECONNRESET:
case -ESHUTDOWN:
return;
case 0:
break;
default:
err("%s: urb status: %d", __func__, status);
return;
}
len = urb->actual_length;
buf = urb->transfer_buffer;
skb = dev_alloc_skb(NET_IP_ALIGN + len);
if (!skb) {
err("%s: dev_alloc_skb: -ENOMEM", __func__);
dev->net->stats.rx_dropped++;
return;
}
skb_reserve(skb, NET_IP_ALIGN);
memcpy(skb_put(skb, len), buf + NET_IP_ALIGN, len - NET_IP_ALIGN);
skb->dev = dev->net;
skb->protocol = eth_type_trans(skb, dev->net);
dev->net->stats.rx_packets++;
dev->net->stats.rx_bytes += len;
netif_rx(skb);
ipheth_rx_submit(dev, GFP_ATOMIC);
}
static void ipheth_sndbulk_callback(struct urb *urb)
{
struct ipheth_device *dev;
int status = urb->status;
dev = urb->context;
if (dev == NULL)
return;
if (status != 0 &&
status != -ENOENT &&
status != -ECONNRESET &&
status != -ESHUTDOWN)
err("%s: urb status: %d", __func__, status);
dev_kfree_skb_irq(dev->tx_skb);
netif_wake_queue(dev->net);
}
static int ipheth_carrier_set(struct ipheth_device *dev)
{
struct usb_device *udev = dev->udev;
int retval;
retval = usb_control_msg(udev,
usb_rcvctrlpipe(udev, IPHETH_CTRL_ENDP),
IPHETH_CMD_CARRIER_CHECK, /* request */
0xc0, /* request type */
0x00, /* value */
0x02, /* index */
dev->ctrl_buf, IPHETH_CTRL_BUF_SIZE,
IPHETH_CTRL_TIMEOUT);
if (retval < 0) {
err("%s: usb_control_msg: %d", __func__, retval);
return retval;
}
if (dev->ctrl_buf[0] == IPHETH_CARRIER_ON)
netif_carrier_on(dev->net);
else
netif_carrier_off(dev->net);
return 0;
}
static void ipheth_carrier_check_work(struct work_struct *work)
{
struct ipheth_device *dev = container_of(work, st
|