drivers/net/usb/ch9200.c - kernel/msm-4.9 - Gitiles

 /*
  * USB 10M/100M ethernet adapter
  *
  * This file is licensed under the terms of the GNU General Public License
  * version 2. This program is licensed "as is" without any warranty of any
  * kind, whether express or implied
  *
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/stddef.h>
 #include <linux/init.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/mii.h>
 #include <linux/usb.h>
 #include <linux/crc32.h>
 #include <linux/usb/usbnet.h>
 #include <linux/slab.h>

 #define CH9200_VID		0x1A86
 #define CH9200_PID_E092		0xE092

 #define CTRL_TIMEOUT_MS		1000

 #define CONTROL_TIMEOUT_MS 1000

 #define REQUEST_READ	0x0E
 #define REQUEST_WRITE	0x0F

 /* Address space:
  * 00-63 : MII
  * 64-128: MAC
  *
  * Note: all accesses must be 16-bit
  */

 #define MAC_REG_CTRL 64
 #define MAC_REG_STATUS 66
 #define MAC_REG_INTERRUPT_MASK 68
 #define MAC_REG_PHY_COMMAND 70
 #define MAC_REG_PHY_DATA 72
 #define MAC_REG_STATION_L 74
 #define MAC_REG_STATION_M 76
 #define MAC_REG_STATION_H 78
 #define MAC_REG_HASH_L 80
 #define MAC_REG_HASH_M1 82
 #define MAC_REG_HASH_M2 84
 #define MAC_REG_HASH_H 86
 #define MAC_REG_THRESHOLD 88
 #define MAC_REG_FIFO_DEPTH 90
 #define MAC_REG_PAUSE 92
 #define MAC_REG_FLOW_CONTROL 94

 /* Control register bits
  *
  * Note: bits 13 and 15 are reserved
  */
 #define LOOPBACK		(0x01 << 14)
 #define BASE100X		(0x01 << 12)
 #define MBPS_10			(0x01 << 11)
 #define DUPLEX_MODE		(0x01 << 10)
 #define PAUSE_FRAME		(0x01 << 9)
 #define PROMISCUOUS		(0x01 << 8)
 #define MULTICAST		(0x01 << 7)
 #define BROADCAST		(0x01 << 6)
 #define HASH			(0x01 << 5)
 #define APPEND_PAD		(0x01 << 4)
 #define APPEND_CRC		(0x01 << 3)
 #define TRANSMITTER_ACTION	(0x01 << 2)
 #define RECEIVER_ACTION		(0x01 << 1)
 #define DMA_ACTION		(0x01 << 0)

 /* Status register bits
  *
  * Note: bits 7-15 are reserved
  */
 #define ALIGNMENT		(0x01 << 6)
 #define FIFO_OVER_RUN		(0x01 << 5)
 #define FIFO_UNDER_RUN		(0x01 << 4)
 #define RX_ERROR		(0x01 << 3)
 #define RX_COMPLETE		(0x01 << 2)
 #define TX_ERROR		(0x01 << 1)
 #define TX_COMPLETE		(0x01 << 0)

 /* FIFO depth register bits
  *
  * Note: bits 6 and 14 are reserved
  */

 #define ETH_TXBD		(0x01 << 15)
 #define ETN_TX_FIFO_DEPTH	(0x01 << 8)
 #define ETH_RXBD		(0x01 << 7)
 #define ETH_RX_FIFO_DEPTH	(0x01 << 0)

 static int control_read(struct usbnet *dev,
 			unsigned char request, unsigned short value,
 			unsigned short index, void *data, unsigned short size,
 			int timeout)
 {
 	unsigned char *buf = NULL;
 	unsigned char request_type;
 	int err = 0;

 	if (request == REQUEST_READ)
 		request_type = (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER);
 	else
 		request_type = (USB_DIR_IN | USB_TYPE_VENDOR |
 				USB_RECIP_DEVICE);

 	netdev_dbg(dev->net, "Control_read() index=0x%02x size=%d\n",
 		   index, size);

 	buf = kmalloc(size, GFP_KERNEL);
 	if (!buf) {
 		err = -ENOMEM;
 		goto err_out;
 	}

 	err = usb_control_msg(dev->udev,
 			      usb_rcvctrlpipe(dev->udev, 0),
 			      request, request_type, value, index, buf, size,
 			      timeout);
 	if (err == size)
 		memcpy(data, buf, size);
 	else if (err >= 0)
 		err = -EINVAL;
 	kfree(buf);

 	return err;

 err_out:
 	return err;
 }

 static int control_write(struct usbnet *dev, unsigned char request,
 			 unsigned short value, unsigned short index,
 			 void *data, unsigned short size, int timeout)
 {
 	unsigned char *buf = NULL;
 	unsigned char request_type;
 	int err = 0;

 	if (request == REQUEST_WRITE)
 		request_type = (USB_DIR_OUT | USB_TYPE_VENDOR |
 				USB_RECIP_OTHER);
 	else
 		request_type = (USB_DIR_OUT | USB_TYPE_VENDOR |
 				USB_RECIP_DEVICE);

 	netdev_dbg(dev->net, "Control_write() index=0x%02x size=%d\n",
 		   index, size);

 	if (data) {
 		buf = kmemdup(data, size, GFP_KERNEL);
 		if (!buf) {
 			err = -ENOMEM;
 			goto err_out;
 		}
 	}

 	err = usb_control_msg(dev->udev,
 			      usb_sndctrlpipe(dev->udev, 0),
 			      request, request_type, value, index, buf, size,
 			      timeout);
 	if (err >= 0 && err < size)
 		err = -EINVAL;
 	kfree(buf);

 	return 0;

 err_out:
 	return err;
 }

 static int ch9200_mdio_read(struct net_device *netdev, int phy_id, int loc)
 {
 	struct usbnet *dev = netdev_priv(netdev);
 	unsigned char buff[2];

 	netdev_dbg(netdev, "ch9200_mdio_read phy_id:%02x loc:%02x\n",
 		   phy_id, loc);

 	if (phy_id != 0)
 		return -ENODEV;

 	control_read(dev, REQUEST_READ, 0, loc * 2, buff, 0x02,
 		     CONTROL_TIMEOUT_MS);

 	return (buff[0] | buff[1] << 8);
 }

 static void ch9200_mdio_write(struct net_device *netdev,
 			      int phy_id, int loc, int val)
 {
 	struct usbnet *dev = netdev_priv(netdev);
 	unsigned char buff[2];

 	netdev_dbg(netdev, "ch9200_mdio_write() phy_id=%02x loc:%02x\n",
 		   phy_id, loc);

 	if (phy_id != 0)
 		return;

 	buff[0] = (unsigned char)val;
 	buff[1] = (unsigned char)(val >> 8);

 	control_write(dev, REQUEST_WRITE, 0, loc * 2, buff, 0x02,
 		      CONTROL_TIMEOUT_MS);
 }

 static int ch9200_link_reset(struct usbnet *dev)
 {
 	struct ethtool_cmd ecmd;

 	mii_check_media(&dev->mii, 1, 1);
 	mii_ethtool_gset(&dev->mii, &ecmd);

 	netdev_dbg(dev->net, "link_reset() speed:%d duplex:%d\n",
 		   ecmd.speed, ecmd.duplex);

 	return 0;
 }

 static void ch9200_status(struct usbnet *dev, struct urb *urb)
 {
 	int link;
 	unsigned char *buf;

 	if (urb->actual_length < 16)
 		return;

 	buf = urb->transfer_buffer;
 	link = !!(buf[0] & 0x01);

 	if (link) {
 		netif_carrier_on(dev->net);
 		usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 	} else {
 		netif_carrier_off(dev->net);
 	}
 }

 static struct sk_buff *ch9200_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 				       gfp_t flags)
 {
 	int i = 0;
 	int len = 0;
 	int tx_overhead = 0;

 	tx_overhead = 0x40;

 	len = skb->len;
 	if (skb_cow_head(skb, tx_overhead)) {
 		dev_kfree_skb_any(skb);
 		return NULL;
 	}

 	__skb_push(skb, tx_overhead);
 	/* usbnet adds padding if length is a multiple of packet size
 	 * if so, adjust length value in header
 	 */
 	if ((skb->len % dev->maxpacket) == 0)
 		len++;

 	skb->data[0] = len;
 	skb->data[1] = len >> 8;
 	skb->data[2] = 0x00;
 	skb->data[3] = 0x80;

 	for (i = 4; i < 48; i++)
 		skb->data[i] = 0x00;

 	skb->data[48] = len;
 	skb->data[49] = len >> 8;
 	skb->data[50] = 0x00;
 	skb->data[51] = 0x80;

 	for (i = 52; i < 64; i++)
 		skb->data[i] = 0x00;

 	return skb;
 }

 static int ch9200_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 {
 	int len = 0;
 	int rx_overhead = 0;

 	rx_overhead = 64;

 	if (unlikely(skb->len < rx_overhead)) {
 		dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
 		return 0;
 	}

 	len = (skb->data[skb->len - 16] | skb->data[skb->len - 15] << 8);
 	skb_trim(skb, len);

 	return 1;
 }

 static int get_mac_address(struct usbnet *dev, unsigned char *data)
 {
 	int err = 0;
 	unsigned char mac_addr[0x06];
 	int rd_mac_len = 0;

 	netdev_dbg(dev->net, "get_mac_address:\n\tusbnet VID:%0x PID:%0x\n",
 		   dev->udev->descriptor.idVendor,
 		   dev->udev->descriptor.idProduct);

 	memset(mac_addr, 0, sizeof(mac_addr));
 	rd_mac_len = control_read(dev, REQUEST_READ, 0,
 				  MAC_REG_STATION_L, mac_addr, 0x02,
 				  CONTROL_TIMEOUT_MS);
 	rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_M,
 				   mac_addr + 2, 0x02, CONTROL_TIMEOUT_MS);
 	rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_H,
 				   mac_addr + 4, 0x02, CONTROL_TIMEOUT_MS);
 	if (rd_mac_len != ETH_ALEN)
 		err = -EINVAL;

 	data[0] = mac_addr[5];
 	data[1] = mac_addr[4];
 	data[2] = mac_addr[3];
 	data[3] = mac_addr[2];
 	data[4] = mac_addr[1];
 	data[5] = mac_addr[0];

 	return err;
 }

 static int ch9200_bind(struct usbnet *dev, struct usb_interface *intf)
 {
 	int retval = 0;
 	unsigned char data[2];

 	retval = usbnet_get_endpoints(dev, intf);
 	if (retval)
 		return retval;

 	dev->mii.dev = dev->net;
 	dev->mii.mdio_read = ch9200_mdio_read;
 	dev->mii.mdio_write = ch9200_mdio_write;
 	dev->mii.reg_num_mask = 0x1f;

 	dev->mii.phy_id_mask = 0x1f;

 	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
 	dev->rx_urb_size = 24 * 64 + 16;
 	mii_nway_restart(&dev->mii);

 	data[0] = 0x01;
 	data[1] = 0x0F;
 	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_THRESHOLD, data,
 			       0x02, CONTROL_TIMEOUT_MS);

 	data[0] = 0xA0;
 	data[1] = 0x90;
 	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FIFO_DEPTH, data,
 			       0x02, CONTROL_TIMEOUT_MS);

 	data[0] = 0x30;
 	data[1] = 0x00;
 	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_PAUSE, data,
 			       0x02, CONTROL_TIMEOUT_MS);

 	data[0] = 0x17;
 	data[1] = 0xD8;
 	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FLOW_CONTROL,
 			       data, 0x02, CONTROL_TIMEOUT_MS);

 	/* Undocumented register */
 	data[0] = 0x01;
 	data[1] = 0x00;
 	retval = control_write(dev, REQUEST_WRITE, 0, 254, data, 0x02,
 			       CONTROL_TIMEOUT_MS);

 	data[0] = 0x5F;
 	data[1] = 0x0D;
 	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_CTRL, data, 0x02,
 			       CONTROL_TIMEOUT_MS);

 	retval = get_mac_address(dev, dev->net->dev_addr);

 	return retval;
 }

 static const struct driver_info ch9200_info = {
 	.description = "CH9200 USB to Network Adaptor",
 	.flags = FLAG_ETHER,
 	.bind = ch9200_bind,
 	.rx_fixup = ch9200_rx_fixup,
 	.tx_fixup = ch9200_tx_fixup,
 	.status = ch9200_status,
 	.link_reset = ch9200_link_reset,
 	.reset = ch9200_link_reset,
 };

 static const struct usb_device_id ch9200_products[] = {
 	{
 	 USB_DEVICE(0x1A86, 0xE092),
 	 .driver_info = (unsigned long)&ch9200_info,
 	 },
 	{},
 };

 MODULE_DEVICE_TABLE(usb, ch9200_products);

 static struct usb_driver ch9200_driver = {
 	.name = "ch9200",
 	.id_table = ch9200_products,
 	.probe = usbnet_probe,
 	.disconnect = usbnet_disconnect,
 	.suspend = usbnet_suspend,
 	.resume = usbnet_resume,
 };

 module_usb_driver(ch9200_driver);

 MODULE_DESCRIPTION("QinHeng CH9200 USB Network device");
 MODULE_LICENSE("GPL");
	/*
	* USB 10M/100M ethernet adapter
	*
	* This file is licensed under the terms of the GNU General Public License
	* version 2. This program is licensed "as is" without any warranty of any
	* kind, whether express or implied
	*
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/sched.h>
	#include <linux/stddef.h>
	#include <linux/init.h>
	#include <linux/netdevice.h>
	#include <linux/etherdevice.h>
	#include <linux/ethtool.h>
	#include <linux/mii.h>
	#include <linux/usb.h>
	#include <linux/crc32.h>
	#include <linux/usb/usbnet.h>
	#include <linux/slab.h>

	#define CH9200_VID 0x1A86
	#define CH9200_PID_E092 0xE092

	#define CTRL_TIMEOUT_MS 1000

	#define CONTROL_TIMEOUT_MS 1000

	#define REQUEST_READ 0x0E
	#define REQUEST_WRITE 0x0F

	/* Address space:
	* 00-63 : MII
	* 64-128: MAC
	*
	* Note: all accesses must be 16-bit
	*/

	#define MAC_REG_CTRL 64
	#define MAC_REG_STATUS 66
	#define MAC_REG_INTERRUPT_MASK 68
	#define MAC_REG_PHY_COMMAND 70
	#define MAC_REG_PHY_DATA 72
	#define MAC_REG_STATION_L 74
	#define MAC_REG_STATION_M 76
	#define MAC_REG_STATION_H 78
	#define MAC_REG_HASH_L 80
	#define MAC_REG_HASH_M1 82
	#define MAC_REG_HASH_M2 84
	#define MAC_REG_HASH_H 86
	#define MAC_REG_THRESHOLD 88
	#define MAC_REG_FIFO_DEPTH 90
	#define MAC_REG_PAUSE 92
	#define MAC_REG_FLOW_CONTROL 94

	/* Control register bits
	*
	* Note: bits 13 and 15 are reserved
	*/
	#define LOOPBACK (0x01 << 14)
	#define BASE100X (0x01 << 12)
	#define MBPS_10 (0x01 << 11)
	#define DUPLEX_MODE (0x01 << 10)
	#define PAUSE_FRAME (0x01 << 9)
	#define PROMISCUOUS (0x01 << 8)
	#define MULTICAST (0x01 << 7)
	#define BROADCAST (0x01 << 6)
	#define HASH (0x01 << 5)
	#define APPEND_PAD (0x01 << 4)
	#define APPEND_CRC (0x01 << 3)
	#define TRANSMITTER_ACTION (0x01 << 2)
	#define RECEIVER_ACTION (0x01 << 1)
	#define DMA_ACTION (0x01 << 0)

	/* Status register bits
	*
	* Note: bits 7-15 are reserved
	*/
	#define ALIGNMENT (0x01 << 6)
	#define FIFO_OVER_RUN (0x01 << 5)
	#define FIFO_UNDER_RUN (0x01 << 4)
	#define RX_ERROR (0x01 << 3)
	#define RX_COMPLETE (0x01 << 2)
	#define TX_ERROR (0x01 << 1)
	#define TX_COMPLETE (0x01 << 0)

	/* FIFO depth register bits
	*
	* Note: bits 6 and 14 are reserved
	*/

	#define ETH_TXBD (0x01 << 15)
	#define ETN_TX_FIFO_DEPTH (0x01 << 8)
	#define ETH_RXBD (0x01 << 7)
	#define ETH_RX_FIFO_DEPTH (0x01 << 0)

	static int control_read(struct usbnet *dev,
	unsigned char request, unsigned short value,
	unsigned short index, void *data, unsigned short size,
	int timeout)
	{
	unsigned char *buf = NULL;
	unsigned char request_type;
	int err = 0;

	if (request == REQUEST_READ)
	request_type = (USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_OTHER);
	else
	request_type = (USB_DIR_IN \| USB_TYPE_VENDOR \|
	USB_RECIP_DEVICE);

	netdev_dbg(dev->net, "Control_read() index=0x%02x size=%d\n",
	index, size);

	buf = kmalloc(size, GFP_KERNEL);
	if (!buf) {
	err = -ENOMEM;
	goto err_out;
	}

	err = usb_control_msg(dev->udev,
	usb_rcvctrlpipe(dev->udev, 0),
	request, request_type, value, index, buf, size,
	timeout);
	if (err == size)
	memcpy(data, buf, size);
	else if (err >= 0)
	err = -EINVAL;
	kfree(buf);

	return err;

	err_out:
	return err;
	}

	static int control_write(struct usbnet *dev, unsigned char request,
	unsigned short value, unsigned short index,
	void *data, unsigned short size, int timeout)
	{
	unsigned char *buf = NULL;
	unsigned char request_type;
	int err = 0;

	if (request == REQUEST_WRITE)
	request_type = (USB_DIR_OUT \| USB_TYPE_VENDOR \|
	USB_RECIP_OTHER);
	else
	request_type = (USB_DIR_OUT \| USB_TYPE_VENDOR \|
	USB_RECIP_DEVICE);

	netdev_dbg(dev->net, "Control_write() index=0x%02x size=%d\n",
	index, size);

	if (data) {
	buf = kmemdup(data, size, GFP_KERNEL);
	if (!buf) {
	err = -ENOMEM;
	goto err_out;
	}
	}

	err = usb_control_msg(dev->udev,
	usb_sndctrlpipe(dev->udev, 0),
	request, request_type, value, index, buf, size,
	timeout);
	if (err >= 0 && err < size)
	err = -EINVAL;
	kfree(buf);

	return 0;

	err_out:
	return err;
	}

	static int ch9200_mdio_read(struct net_device *netdev, int phy_id, int loc)
	{
	struct usbnet *dev = netdev_priv(netdev);
	unsigned char buff[2];

	netdev_dbg(netdev, "ch9200_mdio_read phy_id:%02x loc:%02x\n",
	phy_id, loc);

	if (phy_id != 0)
	return -ENODEV;

	control_read(dev, REQUEST_READ, 0, loc * 2, buff, 0x02,
	CONTROL_TIMEOUT_MS);

	return (buff[0] \| buff[1] << 8);
	}

	static void ch9200_mdio_write(struct net_device *netdev,
	int phy_id, int loc, int val)
	{
	struct usbnet *dev = netdev_priv(netdev);
	unsigned char buff[2];

	netdev_dbg(netdev, "ch9200_mdio_write() phy_id=%02x loc:%02x\n",
	phy_id, loc);

	if (phy_id != 0)
	return;

	buff[0] = (unsigned char)val;
	buff[1] = (unsigned char)(val >> 8);

	control_write(dev, REQUEST_WRITE, 0, loc * 2, buff, 0x02,
	CONTROL_TIMEOUT_MS);
	}

	static int ch9200_link_reset(struct usbnet *dev)
	{
	struct ethtool_cmd ecmd;

	mii_check_media(&dev->mii, 1, 1);
	mii_ethtool_gset(&dev->mii, &ecmd);

	netdev_dbg(dev->net, "link_reset() speed:%d duplex:%d\n",
	ecmd.speed, ecmd.duplex);

	return 0;
	}

	static void ch9200_status(struct usbnet dev, struct urb urb)
	{
	int link;
	unsigned char *buf;

	if (urb->actual_length < 16)
	return;

	buf = urb->transfer_buffer;
	link = !!(buf[0] & 0x01);

	if (link) {
	netif_carrier_on(dev->net);
	usbnet_defer_kevent(dev, EVENT_LINK_RESET);
	} else {
	netif_carrier_off(dev->net);
	}
	}

	static struct sk_buff ch9200_tx_fixup(struct usbnet dev, struct sk_buff *skb,
	gfp_t flags)
	{
	int i = 0;
	int len = 0;
	int tx_overhead = 0;

	tx_overhead = 0x40;

	len = skb->len;
	if (skb_cow_head(skb, tx_overhead)) {
	dev_kfree_skb_any(skb);
	return NULL;
	}

	__skb_push(skb, tx_overhead);
	/* usbnet adds padding if length is a multiple of packet size
	* if so, adjust length value in header
	*/
	if ((skb->len % dev->maxpacket) == 0)
	len++;

	skb->data[0] = len;
	skb->data[1] = len >> 8;
	skb->data[2] = 0x00;
	skb->data[3] = 0x80;

	for (i = 4; i < 48; i++)
	skb->data[i] = 0x00;

	skb->data[48] = len;
	skb->data[49] = len >> 8;
	skb->data[50] = 0x00;
	skb->data[51] = 0x80;

	for (i = 52; i < 64; i++)
	skb->data[i] = 0x00;

	return skb;
	}

	static int ch9200_rx_fixup(struct usbnet dev, struct sk_buff skb)
	{
	int len = 0;
	int rx_overhead = 0;

	rx_overhead = 64;

	if (unlikely(skb->len < rx_overhead)) {
	dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
	return 0;
	}

	len = (skb->data[skb->len - 16] \| skb->data[skb->len - 15] << 8);
	skb_trim(skb, len);

	return 1;
	}

	static int get_mac_address(struct usbnet dev, unsigned char data)
	{
	int err = 0;
	unsigned char mac_addr[0x06];
	int rd_mac_len = 0;

	netdev_dbg(dev->net, "get_mac_address:\n\tusbnet VID:%0x PID:%0x\n",
	dev->udev->descriptor.idVendor,
	dev->udev->descriptor.idProduct);

	memset(mac_addr, 0, sizeof(mac_addr));
	rd_mac_len = control_read(dev, REQUEST_READ, 0,
	MAC_REG_STATION_L, mac_addr, 0x02,
	CONTROL_TIMEOUT_MS);
	rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_M,
	mac_addr + 2, 0x02, CONTROL_TIMEOUT_MS);
	rd_mac_len += control_read(dev, REQUEST_READ, 0, MAC_REG_STATION_H,
	mac_addr + 4, 0x02, CONTROL_TIMEOUT_MS);
	if (rd_mac_len != ETH_ALEN)
	err = -EINVAL;

	data[0] = mac_addr[5];
	data[1] = mac_addr[4];
	data[2] = mac_addr[3];
	data[3] = mac_addr[2];
	data[4] = mac_addr[1];
	data[5] = mac_addr[0];

	return err;
	}

	static int ch9200_bind(struct usbnet dev, struct usb_interface intf)
	{
	int retval = 0;
	unsigned char data[2];

	retval = usbnet_get_endpoints(dev, intf);
	if (retval)
	return retval;

	dev->mii.dev = dev->net;
	dev->mii.mdio_read = ch9200_mdio_read;
	dev->mii.mdio_write = ch9200_mdio_write;
	dev->mii.reg_num_mask = 0x1f;

	dev->mii.phy_id_mask = 0x1f;

	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
	dev->rx_urb_size = 24 * 64 + 16;
	mii_nway_restart(&dev->mii);

	data[0] = 0x01;
	data[1] = 0x0F;
	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_THRESHOLD, data,
	0x02, CONTROL_TIMEOUT_MS);

	data[0] = 0xA0;
	data[1] = 0x90;
	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FIFO_DEPTH, data,
	0x02, CONTROL_TIMEOUT_MS);

	data[0] = 0x30;
	data[1] = 0x00;
	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_PAUSE, data,
	0x02, CONTROL_TIMEOUT_MS);

	data[0] = 0x17;
	data[1] = 0xD8;
	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_FLOW_CONTROL,
	data, 0x02, CONTROL_TIMEOUT_MS);

	/* Undocumented register */
	data[0] = 0x01;
	data[1] = 0x00;
	retval = control_write(dev, REQUEST_WRITE, 0, 254, data, 0x02,
	CONTROL_TIMEOUT_MS);

	data[0] = 0x5F;
	data[1] = 0x0D;
	retval = control_write(dev, REQUEST_WRITE, 0, MAC_REG_CTRL, data, 0x02,
	CONTROL_TIMEOUT_MS);

	retval = get_mac_address(dev, dev->net->dev_addr);

	return retval;
	}

	static const struct driver_info ch9200_info = {
	.description = "CH9200 USB to Network Adaptor",
	.flags = FLAG_ETHER,
	.bind = ch9200_bind,
	.rx_fixup = ch9200_rx_fixup,
	.tx_fixup = ch9200_tx_fixup,
	.status = ch9200_status,
	.link_reset = ch9200_link_reset,
	.reset = ch9200_link_reset,
	};

	static const struct usb_device_id ch9200_products[] = {
	{
	USB_DEVICE(0x1A86, 0xE092),
	.driver_info = (unsigned long)&ch9200_info,
	},
	{},
	};

	MODULE_DEVICE_TABLE(usb, ch9200_products);

	static struct usb_driver ch9200_driver = {
	.name = "ch9200",
	.id_table = ch9200_products,
	.probe = usbnet_probe,
	.disconnect = usbnet_disconnect,
	.suspend = usbnet_suspend,
	.resume = usbnet_resume,
	};

	module_usb_driver(ch9200_driver);

	MODULE_DESCRIPTION("QinHeng CH9200 USB Network device");
	MODULE_LICENSE("GPL");