Release 4.7 drivers/net/usb/dm9601.c

/*
 * Davicom DM96xx USB 10/100Mbps ethernet devices
 *
 * Peter Korsgaard <jacmet@sunsite.dk>
 *
 * 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.
 */

//#define DEBUG

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/stddef.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>

/* datasheet:
 http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf
*/

/* control requests */

#define DM_READ_REGS	0x00

#define DM_WRITE_REGS	0x01

#define DM_READ_MEMS	0x02

#define DM_WRITE_REG	0x03

#define DM_WRITE_MEMS	0x05

#define DM_WRITE_MEM	0x07

/* registers */

#define DM_NET_CTRL	0x00

#define DM_RX_CTRL	0x05

#define DM_SHARED_CTRL	0x0b

#define DM_SHARED_ADDR	0x0c

#define DM_SHARED_DATA	0x0d	
/* low + high */

#define DM_PHY_ADDR	0x10	
/* 6 bytes */

#define DM_MCAST_ADDR	0x16	
/* 8 bytes */

#define DM_GPR_CTRL	0x1e

#define DM_GPR_DATA	0x1f

#define DM_CHIP_ID	0x2c

#define DM_MODE_CTRL	0x91	
/* only on dm9620 */

/* chip id values */

#define ID_DM9601	0

#define ID_DM9620	1


#define DM_MAX_MCAST	64

#define DM_MCAST_SIZE	8

#define DM_EEPROM_LEN	256

#define DM_TX_OVERHEAD	2	
/* 2 byte header */

#define DM_RX_OVERHEAD	7	
/* 3 byte header + 4 byte crc tail */

#define DM_TIMEOUT	1000



static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
{
	int err;
	err = usbnet_read_cmd(dev, DM_READ_REGS,
			       USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			       0, reg, data, length);
	if(err != length && err >= 0)
		err = -EINVAL;
	return err;
}

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static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
{
	return dm_read(dev, reg, 1, value);
}

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static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data)
{
	int err;
	err = usbnet_write_cmd(dev, DM_WRITE_REGS,
				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				0, reg, data, length);

	if (err >= 0 && err < length)
		err = -EINVAL;
	return err;
}

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static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value)
{
	return usbnet_write_cmd(dev, DM_WRITE_REG,
				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				value, reg, NULL, 0);
}

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static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data)
{
	usbnet_write_cmd_async(dev, DM_WRITE_REGS,
			       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			       0, reg, data, length);
}

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static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
{
	usbnet_write_cmd_async(dev, DM_WRITE_REG,
			       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			       value, reg, NULL, 0);
}

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static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value)
{
	int ret, i;

	mutex_lock(&dev->phy_mutex);

	dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
	dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);

	for (i = 0; i < DM_TIMEOUT; i++) {
		u8 tmp = 0;

		udelay(1);
		ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
		if (ret < 0)
			goto out;

		/* ready */
		if ((tmp & 1) == 0)
			break;
	}

	if (i == DM_TIMEOUT) {
		netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom");
		ret = -EIO;
		goto out;
	}

	dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
	ret = dm_read(dev, DM_SHARED_DATA, 2, value);

	netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n",
		   phy, reg, *value, ret);

 out:
	mutex_unlock(&dev->phy_mutex);
	return ret;
}

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static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
{
	int ret, i;

	mutex_lock(&dev->phy_mutex);

	ret = dm_write(dev, DM_SHARED_DATA, 2, &value);
	if (ret < 0)
		goto out;

	dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
	dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);

	for (i = 0; i < DM_TIMEOUT; i++) {
		u8 tmp = 0;

		udelay(1);
		ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
		if (ret < 0)
			goto out;

		/* ready */
		if ((tmp & 1) == 0)
			break;
	}

	if (i == DM_TIMEOUT) {
		netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom");
		ret = -EIO;
		goto out;
	}

	dm_write_reg(dev, DM_SHARED_CTRL, 0x0);

out:
	mutex_unlock(&dev->phy_mutex);
	return ret;
}

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2.03%
1
20.00%
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simon que
2
1.02%
1
20.00%
al viro
al viro
1
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static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
{
	return dm_read_shared_word(dev, 0, offset, value);
}



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static int dm9601_get_eeprom_len(struct net_device *dev)
{
	return DM_EEPROM_LEN;
}

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static int dm9601_get_eeprom(struct net_device *net,
			     struct ethtool_eeprom *eeprom, u8 * data)
{
	struct usbnet *dev = netdev_priv(net);
	__le16 *ebuf = (__le16 *) data;
	int i;

	/* access is 16bit */
	if ((eeprom->offset % 2) || (eeprom->len % 2))
		return -EINVAL;

	for (i = 0; i < eeprom->len / 2; i++) {
		if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i,
					&ebuf[i]) < 0)
			return -EINVAL;
	}
	return 0;
}

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static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc)
{
	struct usbnet *dev = netdev_priv(netdev);

	__le16 res;

	if (phy_id) {
		netdev_dbg(dev->net, "Only internal phy supported\n");
		return 0;
	}

	dm_read_shared_word(dev, 1, loc, &res);

	netdev_dbg(dev->net,
		   "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
		   phy_id, loc, le16_to_cpu(res));

	return le16_to_cpu(res);
}

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static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
			      int val)
{
	struct usbnet *dev = netdev_priv(netdev);
	__le16 res = cpu_to_le16(val);

	if (phy_id) {
		netdev_dbg(dev->net, "Only internal phy supported\n");
		return;
	}

	netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
		   phy_id, loc, val);

	dm_write_shared_word(dev, 1, loc, res);
}

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static void dm9601_get_drvinfo(struct net_device *net,
			       struct ethtool_drvinfo *info)
{
	/* Inherit standard device info */
	usbnet_get_drvinfo(net, info);
}

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static u32 dm9601_get_link(struct net_device *net)
{
	struct usbnet *dev = netdev_priv(net);

	return mii_link_ok(&dev->mii);
}

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static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
{
	struct usbnet *dev = netdev_priv(net);

	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
}

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static const struct ethtool_ops dm9601_ethtool_ops = {
	.get_drvinfo	= dm9601_get_drvinfo,
	.get_link	= dm9601_get_link,
	.get_msglevel	= usbnet_get_msglevel,
	.set_msglevel	= usbnet_set_msglevel,
	.get_eeprom_len	= dm9601_get_eeprom_len,
	.get_eeprom	= dm9601_get_eeprom,
	.get_settings	= usbnet_get_settings,
	.set_settings	= usbnet_set_settings,
	.nway_reset	= usbnet_nway_reset,
};



static void dm9601_set_multicast(struct net_device *net)
{
	struct usbnet *dev = netdev_priv(net);
	/* We use the 20 byte dev->data for our 8 byte filter buffer
         * to avoid allocating memory that is tricky to free later */
	u8 *hashes = (u8 *) & dev->data;
	u8 rx_ctl = 0x31;

	memset(hashes, 0x00, DM_MCAST_SIZE);
	hashes[DM_MCAST_SIZE - 1] |= 0x80;	/* broadcast address */

	if (net->flags & IFF_PROMISC) {
		rx_ctl |= 0x02;
	} else if (net->flags & IFF_ALLMULTI ||
		   netdev_mc_count(net) > DM_MAX_MCAST) {
		rx_ctl |= 0x08;
	} else if (!netdev_mc_empty(net)) {
		struct netdev_hw_addr *ha;

		netdev_for_each_mc_addr(ha, net) {
			u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
			hashes[crc >> 3] |= 1 << (crc & 0x7);
		}
	}

	dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes);
	dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
}

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static void __dm9601_set_mac_address(struct usbnet *dev)
{
	dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
}

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static int dm9601_set_mac_address(struct net_device *net, void *p)
{
	struct sockaddr *addr = p;
	struct usbnet *dev = netdev_priv(net);

	if (!is_valid_ether_addr(addr->sa_data)) {
		dev_err(&net->dev, "not setting invalid mac address %pM\n",
								addr->sa_data);
		return -EINVAL;
	}

	memcpy(net->dev_addr, addr->sa_data, net->addr_len);
	__dm9601_set_mac_address(dev);

	return 0;
}

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static const struct net_device_ops dm9601_netdev_ops = {
	.ndo_open		= usbnet_open,
	.ndo_stop		= usbnet_stop,
	.ndo_start_xmit		= usbnet_start_xmit,
	.ndo_tx_timeout		= usbnet_tx_timeout,
	.ndo_change_mtu		= usbnet_change_mtu,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_do_ioctl 		= dm9601_ioctl,
	.ndo_set_rx_mode	= dm9601_set_multicast,
	.ndo_set_mac_address	= dm9601_set_mac_address,
};



static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
{
	int ret;
	u8 mac[ETH_ALEN], id;

	ret = usbnet_get_endpoints(dev, intf);
	if (ret)
		goto out;

	dev->net->netdev_ops = &dm9601_netdev_ops;
	dev->net->ethtool_ops = &dm9601_ethtool_ops;
	dev->net->hard_header_len += DM_TX_OVERHEAD;
	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;

	/* dm9620/21a require room for 4 byte padding, even in dm9601
         * mode, so we need +1 to be able to receive full size
         * ethernet frames.
         */
	dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1;

	dev->mii.dev = dev->net;
	dev->mii.mdio_read = dm9601_mdio_read;
	dev->mii.mdio_write = dm9601_mdio_write;
	dev->mii.phy_id_mask = 0x1f;
	dev->mii.reg_num_mask = 0x1f;

	/* reset */
	dm_write_reg(dev, DM_NET_CTRL, 1);
	udelay(20);

	/* read MAC */
	if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) {
		printk(KERN_ERR "Error reading MAC address\n");
		ret = -ENODEV;
		goto out;
	}

	/*
         * Overwrite the auto-generated address only with good ones.
         */
	if (is_valid_ether_addr(mac))
		memcpy(dev->net->dev_addr, mac, ETH_ALEN);
	else {
		printk(KERN_WARNING
			"dm9601: No valid MAC address in EEPROM, using %pM\n",
			dev->net->dev_addr);
		__dm9601_set_mac_address(dev);
	}

	if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) {
		netdev_err(dev->net, "Error reading chip ID\n");
		ret = -ENODEV;
		goto out;
	}

	/* put dm9620 devices in dm9601 mode */
	if (id == ID_DM9620) {
		u8 mode;

		if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) {
			netdev_err(dev->net, "Error reading MODE_CTRL\n");
			ret = -ENODEV;
			goto out;
		}
		dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
	}

	/* power up phy */
	dm_write_reg(dev, DM_GPR_CTRL, 1);
	dm_write_reg(dev, DM_GPR_DATA, 0);

	/* receive broadcast packets */
	dm9601_set_multicast(dev->net);

	dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
	dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
			  ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
	mii_nway_restart(&dev->mii);

out:
	return ret;
}

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10.53%
2
20.00%
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6
1.50%
1
10.00%
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3
0.75%
1
10.00%
Total
399
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10
100.00%



static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
	u8 status;
	int len;

	/* format:
           b1: rx status
           b2: packet length (incl crc) low
           b3: packet length (incl crc) high
           b4..n-4: packet data
           bn-3..bn: ethernet crc
         */

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

	status = skb->data[0];
	len = (skb->data[1] | (skb->data[2] << 8)) - 4;

	if (unlikely(status & 0xbf)) {
		if (status & 0x01) dev->net->stats.rx_fifo_errors++;
		if (status & 0x02) dev->net->stats.rx_crc_errors++;
		if (status & 0x04) dev->net->stats.rx_frame_errors++;
		if (status & 0x20) dev->net->stats.rx_missed_errors++;
		if (status & 0x90) dev->net->stats.rx_length_errors++;
		return 0;
	}

	skb_pull(skb, 3);
	skb_trim(skb, len);

	return 1;
}

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static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
				       gfp_t flags)
{
	int len, pad;

	/* format:
           b1: packet length low
           b2: packet length high
           b3..n: packet data
        */

	len = skb->len + DM_TX_OVERHEAD;

	/* workaround for dm962x errata with tx fifo getting out of
         * sync if a USB bulk transfer retry happens right after a
         * packet with odd / maxpacket length by adding up to 3 bytes
         * padding.
         */
	while ((len & 1) || !(len % dev->maxpacket))
		len++;

	len -= DM_TX_OVERHEAD; /* hw header doesn't count as part of length */
	pad = len - skb->len;

	if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) {
		struct sk_buff *skb2;

		skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags);
		dev_kfree_skb_any(skb);
		skb = skb2;
		if (!skb)
			return NULL;
	}

	__skb_push(skb, DM_TX_OVERHEAD);

	if (pad) {
		memset(skb->data + skb->len, 0, pad);
		__skb_put(skb, pad);
	}

	skb->data[0] = len;
	skb->data[1] = len >> 8;

	return skb;
}

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Prop
Commits
CommitProp
peter korsgaard
peter korsgaard
180
100.00%
4
100.00%
Total
180
100.00%
4
100.00%



static void dm9601_status(struct usbnet *dev, struct urb *urb)
{
	int link;
	u8 *buf;

	/* format:
           b0: net status
           b1: tx status 1
           b2: tx status 2
           b3: rx status
           b4: rx overflow
           b5: rx count
           b6: tx count
           b7: gpr
        */

	if (urb->actual_length < 8)
		return;

	buf = urb->transfer_buffer;

	link = !!(buf[0] & 0x40);
	if (netif_carrier_ok(dev->net) != link) {
		usbnet_link_change(dev, link, 1);
		netdev_dbg(dev->net, "Link Status is: %d\n", link);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
peter korsgaard
peter korsgaard
77
90.59%
1
33.33%
ming lei
ming lei
4
4.71%
1
33.33%
joe perches
joe perches
4
4.71%
1
33.33%
Total
85
100.00%
3
100.00%



static int dm9601_link_reset(struct usbnet *dev)
{
	struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };

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

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

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
peter korsgaard
peter korsgaard
52
77.61%
1
33.33%
david decotigny
david decotigny
12
17.91%
1
33.33%
joe perches
joe perches
3
4.48%
1
33.33%
Total
67
100.00%
3
100.00%


static const struct driver_info dm9601_info = {
	.description	= "Davicom DM96xx USB 10/100 Ethernet",
	.flags		= FLAG_ETHER | FLAG_LINK_INTR,
	.bind		= dm9601_bind,
	.rx_fixup	= dm9601_rx_fixup,
	.tx_fixup	= dm9601_tx_fixup,
	.status		= dm9601_status,
	.link_reset	= dm9601_link_reset,
	.reset		= dm9601_link_reset,
};


static const struct usb_device_id products[] = {
	{
	 USB_DEVICE(0x07aa, 0x9601),	/* Corega FEther USB-TXC */
	 .driver_info = (unsigned long)&dm9601_info,
         },
	{
	 USB_DEVICE(0x0a46, 0x9601),	/* Davicom USB-100 */
	 .driver_info = (unsigned long)&dm9601_info,
         },
	{
	 USB_DEVICE(0x0a46, 0x6688),	/* ZT6688 USB NIC */
	 .driver_info = (unsigned long)&dm9601_info,
         },
	{
	 USB_DEVICE(0x0a46, 0x0268),	/* ShanTou ST268 USB NIC */
	 .driver_info = (unsigned long)&dm9601_info,
         },
	{
	 USB_DEVICE(0x0a46, 0x8515),	/* ADMtek ADM8515 USB NIC */
	 .driver_info = (unsigned long)&dm9601_info,
         },
	{
	USB_DEVICE(0x0a47, 0x9601),	/* Hirose USB-100 */
	.driver_info = (unsigned long)&dm9601_info,
         },
	{
	USB_DEVICE(0x0fe6, 0x8101),	/* DM9601 USB to Fast Ethernet Adapter */
	.driver_info = (unsigned long)&dm9601_info,
         },
	{
	 USB_DEVICE(0x0fe6, 0x9700),	/* DM9601 USB to Fast Ethernet Adapter */
	 .driver_info = (unsigned long)&dm9601_info,
         },
	{
	 USB_DEVICE(0x0a46, 0x9000),	/* DM9000E */
	 .driver_info = (unsigned long)&dm9601_info,
         },
	{
	 USB_DEVICE(0x0a46, 0x9620),	/* DM9620 USB to Fast Ethernet Adapter */
	 .driver_info = (unsigned long)&dm9601_info,
         },
	{
	 USB_DEVICE(0x0a46, 0x9621),	/* DM9621A USB to Fast Ethernet Adapter */
	 .driver_info = (unsigned long)&dm9601_info,
        },
	{
	 USB_DEVICE(0x0a46, 0x9622),	/* DM9622 USB to Fast Ethernet Adapter */
	 .driver_info = (unsigned long)&dm9601_info,
        },
	{
	 USB_DEVICE(0x0a46, 0x0269),	/* DM962OA USB to Fast Ethernet Adapter */
	 .driver_info = (unsigned long)&dm9601_info,
        },
	{
	 USB_DEVICE(0x0a46, 0x1269),	/* DM9621A USB to Fast Ethernet Adapter */
	 .driver_info = (unsigned long)&dm9601_info,
        },
	{},			// END
};

MODULE_DEVICE_TABLE(usb, products);


static struct usb_driver dm9601_driver = {
	.name = "dm9601",
	.id_table = products,
	.probe = usbnet_probe,
	.disconnect = usbnet_disconnect,
	.suspend = usbnet_suspend,
	.resume = usbnet_resume,
	.disable_hub_initiated_lpm = 1,
};


module_usb_driver(dm9601_driver);

MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices");
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
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CommitProp
peter korsgaard
peter korsgaard
2594
87.37%
20
42.55%
fengguang wu
fengguang wu
59
1.99%
3
6.38%
stephen hemminger
stephen hemminger
56
1.89%
2
4.26%
jon dowland
jon dowland
40
1.35%
1
2.13%
joe perches
joe perches
35
1.18%
1
2.13%
wu fengguang
wu fengguang
33
1.11%
1
2.13%
janusz krzysztofik
janusz krzysztofik
20
0.67%
1
2.13%
hideaki yoshifuji
hideaki yoshifuji
20
0.67%
1
2.13%
shahar havivi
shahar havivi
20
0.67%
1
2.13%
jiri pirko
jiri pirko
18
0.61%
3
6.38%
ming lei
ming lei
14
0.47%
2
4.26%
david decotigny
david decotigny
12
0.40%
1
2.13%
tushar behera
tushar behera
11
0.37%
1
2.13%
herbert xu
herbert xu
10
0.34%
1
2.13%
al viro
al viro
6
0.20%
1
2.13%
sarah sharp
sarah sharp
5
0.17%
1
2.13%
simon que
simon que
4
0.13%
1
2.13%
randy dunlap
randy dunlap
4
0.13%
1
2.13%
tejun heo
tejun heo
3
0.10%
1
2.13%
ben hutchings
ben hutchings
2
0.07%
1
2.13%
greg kroah-hartman
greg kroah-hartman
2
0.07%
1
2.13%
jussi kivilinna
jussi kivilinna
1
0.03%
1
2.13%
Total
2969
100.00%
47
100.00%
  
Directory: drivers/net/usb

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