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@@ -0,0 +1,568 @@
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+/*
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+ * ipheth.c - Apple iPhone USB Ethernet driver
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+ *
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+ * Copyright (c) 2009 Diego Giagio <diego@giagio.com>
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+ * All rights reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions
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+ * are met:
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+ * 1. Redistributions of source code must retain the above copyright
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+ * notice, this list of conditions and the following disclaimer.
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+ * 2. Redistributions in binary form must reproduce the above copyright
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+ * notice, this list of conditions and the following disclaimer in the
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+ * documentation and/or other materials provided with the distribution.
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+ * 3. Neither the name of GIAGIO.COM nor the names of its contributors
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+ * may be used to endorse or promote products derived from this software
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+ * without specific prior written permission.
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+ *
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+ * Alternatively, provided that this notice is retained in full, this
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+ * software may be distributed under the terms of the GNU General
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+ * Public License ("GPL") version 2, in which case the provisions of the
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+ * GPL apply INSTEAD OF those given above.
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+ *
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+ * The provided data structures and external interfaces from this code
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+ * are not restricted to be used by modules with a GPL compatible license.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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+ * DAMAGE.
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+ *
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+ *
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+ * Attention: iPhone device must be paired, otherwise it won't respond to our
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+ * driver. For more info: http://giagio.com/wiki/moin.cgi/iPhoneEthernetDriver
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+ *
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/errno.h>
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+#include <linux/init.h>
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+#include <linux/slab.h>
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+#include <linux/module.h>
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+#include <linux/netdevice.h>
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+#include <linux/etherdevice.h>
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+#include <linux/ethtool.h>
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+#include <linux/usb.h>
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+#include <linux/workqueue.h>
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+
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+#define USB_VENDOR_APPLE 0x05ac
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+#define USB_PRODUCT_IPHONE 0x1290
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+#define USB_PRODUCT_IPHONE_3G 0x1292
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+#define USB_PRODUCT_IPHONE_3GS 0x1294
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+
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+#define IPHETH_USBINTF_CLASS 255
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+#define IPHETH_USBINTF_SUBCLASS 253
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+#define IPHETH_USBINTF_PROTO 1
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+
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+#define IPHETH_BUF_SIZE 1516
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+#define IPHETH_TX_TIMEOUT (5 * HZ)
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+
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+#define IPHETH_INTFNUM 2
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+#define IPHETH_ALT_INTFNUM 1
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+
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+#define IPHETH_CTRL_ENDP 0x00
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+#define IPHETH_CTRL_BUF_SIZE 0x40
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+#define IPHETH_CTRL_TIMEOUT (5 * HZ)
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+
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+#define IPHETH_CMD_GET_MACADDR 0x00
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+#define IPHETH_CMD_CARRIER_CHECK 0x45
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+
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+#define IPHETH_CARRIER_CHECK_TIMEOUT round_jiffies_relative(1 * HZ)
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+#define IPHETH_CARRIER_ON 0x04
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+
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+static struct usb_device_id ipheth_table[] = {
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+ { USB_DEVICE_AND_INTERFACE_INFO(
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+ USB_VENDOR_APPLE, USB_PRODUCT_IPHONE,
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+ IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
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+ IPHETH_USBINTF_PROTO) },
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+ { USB_DEVICE_AND_INTERFACE_INFO(
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+ USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_3G,
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+ IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
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+ IPHETH_USBINTF_PROTO) },
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+ { USB_DEVICE_AND_INTERFACE_INFO(
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+ USB_VENDOR_APPLE, USB_PRODUCT_IPHONE_3GS,
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+ IPHETH_USBINTF_CLASS, IPHETH_USBINTF_SUBCLASS,
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+ IPHETH_USBINTF_PROTO) },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(usb, ipheth_table);
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+
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+struct ipheth_device {
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+ struct usb_device *udev;
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+ struct usb_interface *intf;
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+ struct net_device *net;
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+ struct sk_buff *tx_skb;
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+ struct urb *tx_urb;
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+ struct urb *rx_urb;
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+ unsigned char *tx_buf;
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+ unsigned char *rx_buf;
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+ unsigned char *ctrl_buf;
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+ u8 bulk_in;
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+ u8 bulk_out;
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+ struct delayed_work carrier_work;
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+};
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+
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+static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags);
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+
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+static int ipheth_alloc_urbs(struct ipheth_device *iphone)
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+{
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+ struct urb *tx_urb = NULL;
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+ struct urb *rx_urb = NULL;
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+ u8 *tx_buf = NULL;
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+ u8 *rx_buf = NULL;
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+
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+ tx_urb = usb_alloc_urb(0, GFP_KERNEL);
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+ if (tx_urb == NULL)
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+ goto error;
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+
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+ rx_urb = usb_alloc_urb(0, GFP_KERNEL);
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+ if (rx_urb == NULL)
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+ goto error;
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+
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+ tx_buf = usb_buffer_alloc(iphone->udev,
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+ IPHETH_BUF_SIZE,
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+ GFP_KERNEL,
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+ &tx_urb->transfer_dma);
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+ if (tx_buf == NULL)
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+ goto error;
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+
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+ rx_buf = usb_buffer_alloc(iphone->udev,
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+ IPHETH_BUF_SIZE,
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+ GFP_KERNEL,
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+ &rx_urb->transfer_dma);
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+ if (rx_buf == NULL)
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+ goto error;
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+
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+
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+ iphone->tx_urb = tx_urb;
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+ iphone->rx_urb = rx_urb;
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+ iphone->tx_buf = tx_buf;
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+ iphone->rx_buf = rx_buf;
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+ return 0;
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+
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+error:
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+ usb_buffer_free(iphone->udev, IPHETH_BUF_SIZE, rx_buf,
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+ rx_urb->transfer_dma);
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+ usb_buffer_free(iphone->udev, IPHETH_BUF_SIZE, tx_buf,
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+ tx_urb->transfer_dma);
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+ usb_free_urb(rx_urb);
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+ usb_free_urb(tx_urb);
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+ return -ENOMEM;
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+}
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+
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+static void ipheth_free_urbs(struct ipheth_device *iphone)
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+{
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+ usb_buffer_free(iphone->udev, IPHETH_BUF_SIZE, iphone->rx_buf,
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+ iphone->rx_urb->transfer_dma);
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+ usb_buffer_free(iphone->udev, IPHETH_BUF_SIZE, iphone->tx_buf,
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+ iphone->tx_urb->transfer_dma);
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+ usb_free_urb(iphone->rx_urb);
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+ usb_free_urb(iphone->tx_urb);
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+}
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+
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+static void ipheth_kill_urbs(struct ipheth_device *dev)
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+{
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+ usb_kill_urb(dev->tx_urb);
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+ usb_kill_urb(dev->rx_urb);
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+}
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+
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+static void ipheth_rcvbulk_callback(struct urb *urb)
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+{
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+ struct ipheth_device *dev;
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+ struct sk_buff *skb;
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+ int status;
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+ char *buf;
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+ int len;
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+
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+ dev = urb->context;
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+ if (dev == NULL)
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+ return;
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+
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+ status = urb->status;
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+ switch (status) {
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+ case -ENOENT:
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+ case -ECONNRESET:
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+ case -ESHUTDOWN:
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+ return;
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+ case 0:
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+ break;
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+ default:
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+ err("%s: urb status: %d", __func__, urb->status);
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+ return;
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+ }
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+
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+ len = urb->actual_length;
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+ buf = urb->transfer_buffer;
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+
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+ skb = dev_alloc_skb(NET_IP_ALIGN + len);
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+ if (!skb) {
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+ err("%s: dev_alloc_skb: -ENOMEM", __func__);
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+ dev->net->stats.rx_dropped++;
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+ return;
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+ }
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+
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+ skb_reserve(skb, NET_IP_ALIGN);
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+ memcpy(skb_put(skb, len), buf + NET_IP_ALIGN, len - NET_IP_ALIGN);
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+ skb->dev = dev->net;
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+ skb->protocol = eth_type_trans(skb, dev->net);
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+
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+ dev->net->stats.rx_packets++;
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+ dev->net->stats.rx_bytes += len;
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+
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+ netif_rx(skb);
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+ ipheth_rx_submit(dev, GFP_ATOMIC);
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+}
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+
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+static void ipheth_sndbulk_callback(struct urb *urb)
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+{
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+ struct ipheth_device *dev;
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+
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+ dev = urb->context;
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+ if (dev == NULL)
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+ return;
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+
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+ if (urb->status != 0 &&
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+ urb->status != -ENOENT &&
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+ urb->status != -ECONNRESET &&
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+ urb->status != -ESHUTDOWN)
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+ err("%s: urb status: %d", __func__, urb->status);
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+
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+ dev_kfree_skb_irq(dev->tx_skb);
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+ netif_wake_queue(dev->net);
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+}
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+
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+static int ipheth_carrier_set(struct ipheth_device *dev)
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+{
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+ struct usb_device *udev = dev->udev;
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+ int retval;
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+
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+ retval = usb_control_msg(udev,
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+ usb_rcvctrlpipe(udev, IPHETH_CTRL_ENDP),
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+ IPHETH_CMD_CARRIER_CHECK, /* request */
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+ 0xc0, /* request type */
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+ 0x00, /* value */
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+ 0x02, /* index */
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+ dev->ctrl_buf, IPHETH_CTRL_BUF_SIZE,
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+ IPHETH_CTRL_TIMEOUT);
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+ if (retval < 0) {
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+ err("%s: usb_control_msg: %d", __func__, retval);
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+ return retval;
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+ }
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+
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+ if (dev->ctrl_buf[0] == IPHETH_CARRIER_ON)
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+ netif_carrier_on(dev->net);
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+ else
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+ netif_carrier_off(dev->net);
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+
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+ return 0;
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+}
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+
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+static void ipheth_carrier_check_work(struct work_struct *work)
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+{
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+ struct ipheth_device *dev = container_of(work, struct ipheth_device,
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+ carrier_work.work);
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+
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+ ipheth_carrier_set(dev);
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+ schedule_delayed_work(&dev->carrier_work, IPHETH_CARRIER_CHECK_TIMEOUT);
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+}
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+
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+static int ipheth_get_macaddr(struct ipheth_device *dev)
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+{
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+ struct usb_device *udev = dev->udev;
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+ struct net_device *net = dev->net;
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+ int retval;
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+
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+ retval = usb_control_msg(udev,
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+ usb_rcvctrlpipe(udev, IPHETH_CTRL_ENDP),
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+ IPHETH_CMD_GET_MACADDR, /* request */
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+ 0xc0, /* request type */
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+ 0x00, /* value */
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+ 0x02, /* index */
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+ dev->ctrl_buf,
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+ IPHETH_CTRL_BUF_SIZE,
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+ IPHETH_CTRL_TIMEOUT);
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+ if (retval < 0) {
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+ err("%s: usb_control_msg: %d", __func__, retval);
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+ } else if (retval < ETH_ALEN) {
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+ err("%s: usb_control_msg: short packet: %d bytes",
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+ __func__, retval);
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+ retval = -EINVAL;
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+ } else {
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+ memcpy(net->dev_addr, dev->ctrl_buf, ETH_ALEN);
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+ retval = 0;
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+ }
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+
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+ return retval;
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+}
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+
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+static int ipheth_rx_submit(struct ipheth_device *dev, gfp_t mem_flags)
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+{
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+ struct usb_device *udev = dev->udev;
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+ int retval;
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+
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+ usb_fill_bulk_urb(dev->rx_urb, udev,
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+ usb_rcvbulkpipe(udev, dev->bulk_in),
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+ dev->rx_buf, IPHETH_BUF_SIZE,
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+ ipheth_rcvbulk_callback,
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+ dev);
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+ dev->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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+
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+ retval = usb_submit_urb(dev->rx_urb, mem_flags);
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+ if (retval)
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+ err("%s: usb_submit_urb: %d", __func__, retval);
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+ return retval;
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+}
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+
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+static int ipheth_open(struct net_device *net)
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+{
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+ struct ipheth_device *dev = netdev_priv(net);
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+ struct usb_device *udev = dev->udev;
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+ int retval = 0;
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+
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+ usb_set_interface(udev, IPHETH_INTFNUM, IPHETH_ALT_INTFNUM);
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+
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+ retval = ipheth_carrier_set(dev);
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+ if (retval)
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+ return retval;
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+
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+ retval = ipheth_rx_submit(dev, GFP_KERNEL);
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+ if (retval)
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+ return retval;
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+
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+ schedule_delayed_work(&dev->carrier_work, IPHETH_CARRIER_CHECK_TIMEOUT);
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+ netif_start_queue(net);
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+ return retval;
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+}
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+
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+static int ipheth_close(struct net_device *net)
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+{
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+ struct ipheth_device *dev = netdev_priv(net);
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+
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+ cancel_delayed_work_sync(&dev->carrier_work);
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+ netif_stop_queue(net);
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+ return 0;
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+}
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+
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+static int ipheth_tx(struct sk_buff *skb, struct net_device *net)
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+{
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+ struct ipheth_device *dev = netdev_priv(net);
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+ struct usb_device *udev = dev->udev;
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+ int retval;
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+
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+ /* Paranoid */
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+ if (skb->len > IPHETH_BUF_SIZE) {
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+ WARN(1, "%s: skb too large: %d bytes", __func__, skb->len);
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+ dev->net->stats.tx_dropped++;
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+ dev_kfree_skb_irq(skb);
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+ return NETDEV_TX_OK;
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+ }
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+
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+ memcpy(dev->tx_buf, skb->data, skb->len);
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+ if (skb->len < IPHETH_BUF_SIZE)
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+ memset(dev->tx_buf + skb->len, 0, IPHETH_BUF_SIZE - skb->len);
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+
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+ usb_fill_bulk_urb(dev->tx_urb, udev,
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+ usb_sndbulkpipe(udev, dev->bulk_out),
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+ dev->tx_buf, IPHETH_BUF_SIZE,
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+ ipheth_sndbulk_callback,
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+ dev);
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+ dev->tx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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+
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+ retval = usb_submit_urb(dev->tx_urb, GFP_ATOMIC);
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+ if (retval) {
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+ err("%s: usb_submit_urb: %d", __func__, retval);
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+ dev->net->stats.tx_errors++;
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+ dev_kfree_skb_irq(skb);
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+ } else {
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+ dev->tx_skb = skb;
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+
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+ dev->net->stats.tx_packets++;
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+ dev->net->stats.tx_bytes += skb->len;
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+ netif_stop_queue(net);
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+ }
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+
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|
|
+ return NETDEV_TX_OK;
|
|
|
+}
|
|
|
+
|
|
|
+static void ipheth_tx_timeout(struct net_device *net)
|
|
|
+{
|
|
|
+ struct ipheth_device *dev = netdev_priv(net);
|
|
|
+
|
|
|
+ err("%s: TX timeout", __func__);
|
|
|
+ dev->net->stats.tx_errors++;
|
|
|
+ usb_unlink_urb(dev->tx_urb);
|
|
|
+}
|
|
|
+
|
|
|
+static struct net_device_stats *ipheth_stats(struct net_device *net)
|
|
|
+{
|
|
|
+ struct ipheth_device *dev = netdev_priv(net);
|
|
|
+ return &dev->net->stats;
|
|
|
+}
|
|
|
+
|
|
|
+static u32 ipheth_ethtool_op_get_link(struct net_device *net)
|
|
|
+{
|
|
|
+ struct ipheth_device *dev = netdev_priv(net);
|
|
|
+ return netif_carrier_ok(dev->net);
|
|
|
+}
|
|
|
+
|
|
|
+static struct ethtool_ops ops = {
|
|
|
+ .get_link = ipheth_ethtool_op_get_link
|
|
|
+};
|
|
|
+
|
|
|
+static const struct net_device_ops ipheth_netdev_ops = {
|
|
|
+ .ndo_open = &ipheth_open,
|
|
|
+ .ndo_stop = &ipheth_close,
|
|
|
+ .ndo_start_xmit = &ipheth_tx,
|
|
|
+ .ndo_tx_timeout = &ipheth_tx_timeout,
|
|
|
+ .ndo_get_stats = &ipheth_stats,
|
|
|
+};
|
|
|
+
|
|
|
+static struct device_type ipheth_type = {
|
|
|
+ .name = "wwan",
|
|
|
+};
|
|
|
+
|
|
|
+static int ipheth_probe(struct usb_interface *intf,
|
|
|
+ const struct usb_device_id *id)
|
|
|
+{
|
|
|
+ struct usb_device *udev = interface_to_usbdev(intf);
|
|
|
+ struct usb_host_interface *hintf;
|
|
|
+ struct usb_endpoint_descriptor *endp;
|
|
|
+ struct ipheth_device *dev;
|
|
|
+ struct net_device *netdev;
|
|
|
+ int i;
|
|
|
+ int retval;
|
|
|
+
|
|
|
+ netdev = alloc_etherdev(sizeof(struct ipheth_device));
|
|
|
+ if (!netdev)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ netdev->netdev_ops = &ipheth_netdev_ops;
|
|
|
+ netdev->watchdog_timeo = IPHETH_TX_TIMEOUT;
|
|
|
+ strcpy(netdev->name, "wwan%d");
|
|
|
+
|
|
|
+ dev = netdev_priv(netdev);
|
|
|
+ dev->udev = udev;
|
|
|
+ dev->net = netdev;
|
|
|
+ dev->intf = intf;
|
|
|
+
|
|
|
+ /* Set up endpoints */
|
|
|
+ hintf = usb_altnum_to_altsetting(intf, IPHETH_ALT_INTFNUM);
|
|
|
+ if (hintf == NULL) {
|
|
|
+ retval = -ENODEV;
|
|
|
+ err("Unable to find alternate settings interface");
|
|
|
+ goto err_endpoints;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < hintf->desc.bNumEndpoints; i++) {
|
|
|
+ endp = &hintf->endpoint[i].desc;
|
|
|
+ if (usb_endpoint_is_bulk_in(endp))
|
|
|
+ dev->bulk_in = endp->bEndpointAddress;
|
|
|
+ else if (usb_endpoint_is_bulk_out(endp))
|
|
|
+ dev->bulk_out = endp->bEndpointAddress;
|
|
|
+ }
|
|
|
+ if (!(dev->bulk_in && dev->bulk_out)) {
|
|
|
+ retval = -ENODEV;
|
|
|
+ err("Unable to find endpoints");
|
|
|
+ goto err_endpoints;
|
|
|
+ }
|
|
|
+
|
|
|
+ dev->ctrl_buf = kmalloc(IPHETH_CTRL_BUF_SIZE, GFP_KERNEL);
|
|
|
+ if (dev->ctrl_buf == NULL) {
|
|
|
+ retval = -ENOMEM;
|
|
|
+ goto err_alloc_ctrl_buf;
|
|
|
+ }
|
|
|
+
|
|
|
+ retval = ipheth_get_macaddr(dev);
|
|
|
+ if (retval)
|
|
|
+ goto err_get_macaddr;
|
|
|
+
|
|
|
+ INIT_DELAYED_WORK(&dev->carrier_work, ipheth_carrier_check_work);
|
|
|
+
|
|
|
+ retval = ipheth_alloc_urbs(dev);
|
|
|
+ if (retval) {
|
|
|
+ err("error allocating urbs: %d", retval);
|
|
|
+ goto err_alloc_urbs;
|
|
|
+ }
|
|
|
+
|
|
|
+ usb_set_intfdata(intf, dev);
|
|
|
+
|
|
|
+ SET_NETDEV_DEV(netdev, &intf->dev);
|
|
|
+ SET_ETHTOOL_OPS(netdev, &ops);
|
|
|
+ SET_NETDEV_DEVTYPE(netdev, &ipheth_type);
|
|
|
+
|
|
|
+ retval = register_netdev(netdev);
|
|
|
+ if (retval) {
|
|
|
+ err("error registering netdev: %d", retval);
|
|
|
+ retval = -EIO;
|
|
|
+ goto err_register_netdev;
|
|
|
+ }
|
|
|
+
|
|
|
+ dev_info(&intf->dev, "Apple iPhone USB Ethernet device attached\n");
|
|
|
+ return 0;
|
|
|
+
|
|
|
+err_register_netdev:
|
|
|
+ ipheth_free_urbs(dev);
|
|
|
+err_alloc_urbs:
|
|
|
+err_get_macaddr:
|
|
|
+err_alloc_ctrl_buf:
|
|
|
+ kfree(dev->ctrl_buf);
|
|
|
+err_endpoints:
|
|
|
+ free_netdev(netdev);
|
|
|
+ return retval;
|
|
|
+}
|
|
|
+
|
|
|
+static void ipheth_disconnect(struct usb_interface *intf)
|
|
|
+{
|
|
|
+ struct ipheth_device *dev;
|
|
|
+
|
|
|
+ dev = usb_get_intfdata(intf);
|
|
|
+ if (dev != NULL) {
|
|
|
+ unregister_netdev(dev->net);
|
|
|
+ ipheth_kill_urbs(dev);
|
|
|
+ ipheth_free_urbs(dev);
|
|
|
+ kfree(dev->ctrl_buf);
|
|
|
+ free_netdev(dev->net);
|
|
|
+ }
|
|
|
+ usb_set_intfdata(intf, NULL);
|
|
|
+ dev_info(&intf->dev, "Apple iPhone USB Ethernet now disconnected\n");
|
|
|
+}
|
|
|
+
|
|
|
+static struct usb_driver ipheth_driver = {
|
|
|
+ .name = "ipheth",
|
|
|
+ .probe = ipheth_probe,
|
|
|
+ .disconnect = ipheth_disconnect,
|
|
|
+ .id_table = ipheth_table,
|
|
|
+};
|
|
|
+
|
|
|
+static int __init ipheth_init(void)
|
|
|
+{
|
|
|
+ int retval;
|
|
|
+
|
|
|
+ retval = usb_register(&ipheth_driver);
|
|
|
+ if (retval) {
|
|
|
+ err("usb_register failed: %d", retval);
|
|
|
+ return retval;
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void __exit ipheth_exit(void)
|
|
|
+{
|
|
|
+ usb_deregister(&ipheth_driver);
|
|
|
+}
|
|
|
+
|
|
|
+module_init(ipheth_init);
|
|
|
+module_exit(ipheth_exit);
|
|
|
+
|
|
|
+MODULE_AUTHOR("Diego Giagio <diego@giagio.com>");
|
|
|
+MODULE_DESCRIPTION("Apple iPhone USB Ethernet driver");
|
|
|
+MODULE_LICENSE("Dual BSD/GPL");
|
Linus Torvalds