Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 652 insertions, 0 deletions

diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c
new file mode 100644
index 000000000..48d7d2786
--- /dev/null
+++ b/drivers/net/usb/dm9601.c
@@ -0,0 +1,652 @@
+/*
+ * 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;
+}
+
+static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
+{
+	return dm_read(dev, reg, 1, value);
+}
+
+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;
+}
+
+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);
+}
+
+static void dm_write_async(struct usbnet *dev, u8 reg, u16 length,
+			   const void *data)
+{
+	usbnet_write_cmd_async(dev, DM_WRITE_REGS,
+			       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			       0, reg, data, length);
+}
+
+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);
+}
+
+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;
+}
+
+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;
+}
+
+static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
+{
+	return dm_read_shared_word(dev, 0, offset, value);
+}
+
+
+
+static int dm9601_get_eeprom_len(struct net_device *dev)
+{
+	return DM_EEPROM_LEN;
+}
+
+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;
+}
+
+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);
+}
+
+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);
+}
+
+static void dm9601_get_drvinfo(struct net_device *net,
+			       struct ethtool_drvinfo *info)
+{
+	/* Inherit standard device info */
+	usbnet_get_drvinfo(net, info);
+}
+
+static u32 dm9601_get_link(struct net_device *net)
+{
+	struct usbnet *dev = netdev_priv(net);
+
+	return mii_link_ok(&dev->mii);
+}
+
+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);
+}
+
+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,
+	.nway_reset	= usbnet_nway_reset,
+	.get_link_ksettings	= usbnet_get_link_ksettings_mii,
+	.set_link_ksettings	= usbnet_set_link_ksettings_mii,
+};
+
+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);
+}
+
+static void __dm9601_set_mac_address(struct usbnet *dev)
+{
+	dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
+}
+
+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;
+	}
+
+	eth_hw_addr_set(net, addr->sa_data);
+	__dm9601_set_mac_address(dev);
+
+	return 0;
+}
+
+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_get_stats64	= dev_get_tstats64,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_eth_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))
+		eth_hw_addr_set(dev->net, mac);
+	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;
+}
+
+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;
+}
+
+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;
+}
+
+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);
+	}
+}
+
+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;
+}
+
+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,
+	},
+	{
+	 USB_DEVICE(0x0586, 0x3427),	/* ZyXEL Keenetic Plus DSL xDSL modem */
+	 .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");