drivers/ieee802154/fakehard.c - kernel/prism - Git at Google

 /*
  * Sample driver for HardMAC IEEE 802.15.4 devices
  *
  * Copyright (C) 2009 Siemens AG
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2
  * as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Written by:
  * Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
  */
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>
 #include <linux/if_arp.h>

 #include <net/af_ieee802154.h>
 #include <net/ieee802154_netdev.h>
 #include <net/ieee802154.h>
 #include <net/nl802154.h>
 #include <net/wpan-phy.h>

 struct wpan_phy *net_to_phy(struct net_device *dev)
 {
 	return container_of(dev->dev.parent, struct wpan_phy, dev);
 }

 /**
  * fake_get_pan_id - Retrieve the PAN ID of the device.
  * @dev: The network device to retrieve the PAN of.
  *
  * Return the ID of the PAN from the PIB.
  */
 static u16 fake_get_pan_id(struct net_device *dev)
 {
 	BUG_ON(dev->type != ARPHRD_IEEE802154);

 	return 0xeba1;
 }

 /**
  * fake_get_short_addr - Retrieve the short address of the device.
  * @dev: The network device to retrieve the short address of.
  *
  * Returns the IEEE 802.15.4 short-form address cached for this
  * device. If the device has not yet had a short address assigned
  * then this should return 0xFFFF to indicate a lack of association.
  */
 static u16 fake_get_short_addr(struct net_device *dev)
 {
 	BUG_ON(dev->type != ARPHRD_IEEE802154);

 	return 0x1;
 }

 /**
  * fake_get_dsn - Retrieve the DSN of the device.
  * @dev: The network device to retrieve the DSN for.
  *
  * Returns the IEEE 802.15.4 DSN for the network device.
  * The DSN is the sequence number which will be added to each
  * packet or MAC command frame by the MAC during transmission.
  *
  * DSN means 'Data Sequence Number'.
  *
  * Note: This is in section 7.2.1.2 of the IEEE 802.15.4-2006
  *       document.
  */
 static u8 fake_get_dsn(struct net_device *dev)
 {
 	BUG_ON(dev->type != ARPHRD_IEEE802154);

 	return 0x00; /* DSN are implemented in HW, so return just 0 */
 }

 /**
  * fake_get_bsn - Retrieve the BSN of the device.
  * @dev: The network device to retrieve the BSN for.
  *
  * Returns the IEEE 802.15.4 BSN for the network device.
  * The BSN is the sequence number which will be added to each
  * beacon frame sent by the MAC.
  *
  * BSN means 'Beacon Sequence Number'.
  *
  * Note: This is in section 7.2.1.2 of the IEEE 802.15.4-2006
  *       document.
  */
 static u8 fake_get_bsn(struct net_device *dev)
 {
 	BUG_ON(dev->type != ARPHRD_IEEE802154);

 	return 0x00; /* BSN are implemented in HW, so return just 0 */
 }

 /**
  * fake_assoc_req - Make an association request to the HW.
  * @dev: The network device which we are associating to a network.
  * @addr: The coordinator with which we wish to associate.
  * @channel: The channel on which to associate.
  * @cap: The capability information field to use in the association.
  *
  * Start an association with a coordinator. The coordinator's address
  * and PAN ID can be found in @addr.
  *
  * Note: This is in section 7.3.1 and 7.5.3.1 of the IEEE
  *       802.15.4-2006 document.
  */
 static int fake_assoc_req(struct net_device *dev,
 		struct ieee802154_addr *addr, u8 channel, u8 page, u8 cap)
 {
 	struct wpan_phy *phy = net_to_phy(dev);

 	mutex_lock(&phy->pib_lock);
 	phy->current_channel = channel;
 	phy->current_page = page;
 	mutex_unlock(&phy->pib_lock);

 	/* We simply emulate it here */
 	return ieee802154_nl_assoc_confirm(dev, fake_get_short_addr(dev),
 			IEEE802154_SUCCESS);
 }

 /**
  * fake_assoc_resp - Send an association response to a device.
  * @dev: The network device on which to send the response.
  * @addr: The address of the device to respond to.
  * @short_addr: The assigned short address for the device (if any).
  * @status: The result of the association request.
  *
  * Queue the association response of the coordinator to another
  * device's attempt to associate with the network which we
  * coordinate. This is then added to the indirect-send queue to be
  * transmitted to the end device when it polls for data.
  *
  * Note: This is in section 7.3.2 and 7.5.3.1 of the IEEE
  *       802.15.4-2006 document.
  */
 static int fake_assoc_resp(struct net_device *dev,
 		struct ieee802154_addr *addr, u16 short_addr, u8 status)
 {
 	return 0;
 }

 /**
  * fake_disassoc_req - Disassociate a device from a network.
  * @dev: The network device on which we're disassociating a device.
  * @addr: The device to disassociate from the network.
  * @reason: The reason to give to the device for being disassociated.
  *
  * This sends a disassociation notification to the device being
  * disassociated from the network.
  *
  * Note: This is in section 7.5.3.2 of the IEEE 802.15.4-2006
  *       document, with the reason described in 7.3.3.2.
  */
 static int fake_disassoc_req(struct net_device *dev,
 		struct ieee802154_addr *addr, u8 reason)
 {
 	return ieee802154_nl_disassoc_confirm(dev, IEEE802154_SUCCESS);
 }

 /**
  * fake_start_req - Start an IEEE 802.15.4 PAN.
  * @dev: The network device on which to start the PAN.
  * @addr: The coordinator address to use when starting the PAN.
  * @channel: The channel on which to start the PAN.
  * @bcn_ord: Beacon order.
  * @sf_ord: Superframe order.
  * @pan_coord: Whether or not we are the PAN coordinator or just
  *             requesting a realignment perhaps?
  * @blx: Battery Life Extension feature bitfield.
  * @coord_realign: Something to realign something else.
  *
  * If pan_coord is non-zero then this starts a network with the
  * provided parameters, otherwise it attempts a coordinator
  * realignment of the stated network instead.
  *
  * Note: This is in section 7.5.2.3 of the IEEE 802.15.4-2006
  * document, with 7.3.8 describing coordinator realignment.
  */
 static int fake_start_req(struct net_device *dev, struct ieee802154_addr *addr,
 				u8 channel, u8 page,
 				u8 bcn_ord, u8 sf_ord, u8 pan_coord, u8 blx,
 				u8 coord_realign)
 {
 	struct wpan_phy *phy = net_to_phy(dev);

 	mutex_lock(&phy->pib_lock);
 	phy->current_channel = channel;
 	phy->current_page = page;
 	mutex_unlock(&phy->pib_lock);

 	/* We don't emulate beacons here at all, so START should fail */
 	ieee802154_nl_start_confirm(dev, IEEE802154_INVALID_PARAMETER);
 	return 0;
 }

 /**
  * fake_scan_req - Start a channel scan.
  * @dev: The network device on which to perform a channel scan.
  * @type: The type of scan to perform.
  * @channels: The channel bitmask to scan.
  * @duration: How long to spend on each channel.
  *
  * This starts either a passive (energy) scan or an active (PAN) scan
  * on the channels indicated in the @channels bitmask. The duration of
  * the scan is measured in terms of superframe duration. Specifically,
  * the scan will spend aBaseSuperFrameDuration * ((2^n) + 1) on each
  * channel.
  *
  * Note: This is in section 7.5.2.1 of the IEEE 802.15.4-2006 document.
  */
 static int fake_scan_req(struct net_device *dev, u8 type, u32 channels,
 		u8 page, u8 duration)
 {
 	u8 edl[27] = {};
 	return ieee802154_nl_scan_confirm(dev, IEEE802154_SUCCESS, type,
 			channels, page,
 			type == IEEE802154_MAC_SCAN_ED ? edl : NULL);
 }

 static struct ieee802154_mlme_ops fake_mlme = {
 	.assoc_req = fake_assoc_req,
 	.assoc_resp = fake_assoc_resp,
 	.disassoc_req = fake_disassoc_req,
 	.start_req = fake_start_req,
 	.scan_req = fake_scan_req,

 	.get_pan_id = fake_get_pan_id,
 	.get_short_addr = fake_get_short_addr,
 	.get_dsn = fake_get_dsn,
 	.get_bsn = fake_get_bsn,
 };

 static int ieee802154_fake_open(struct net_device *dev)
 {
 	netif_start_queue(dev);
 	return 0;
 }

 static int ieee802154_fake_close(struct net_device *dev)
 {
 	netif_stop_queue(dev);
 	return 0;
 }

 static netdev_tx_t ieee802154_fake_xmit(struct sk_buff *skb,
 					      struct net_device *dev)
 {
 	dev->stats.tx_packets++;
 	dev->stats.tx_bytes += skb->len;

 	/* FIXME: do hardware work here ... */

 	dev_kfree_skb(skb);
 	return NETDEV_TX_OK;
 }


 static int ieee802154_fake_ioctl(struct net_device *dev, struct ifreq *ifr,
 		int cmd)
 {
 	struct sockaddr_ieee802154 *sa =
 		(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
 	u16 pan_id, short_addr;

 	switch (cmd) {
 	case SIOCGIFADDR:
 		/* FIXME: fixed here, get from device IRL */
 		pan_id = fake_get_pan_id(dev);
 		short_addr = fake_get_short_addr(dev);
 		if (pan_id == IEEE802154_PANID_BROADCAST ||
 		    short_addr == IEEE802154_ADDR_BROADCAST)
 			return -EADDRNOTAVAIL;

 		sa->family = AF_IEEE802154;
 		sa->addr.addr_type = IEEE802154_ADDR_SHORT;
 		sa->addr.pan_id = pan_id;
 		sa->addr.short_addr = short_addr;
 		return 0;
 	}
 	return -ENOIOCTLCMD;
 }

 static int ieee802154_fake_mac_addr(struct net_device *dev, void *p)
 {
 	return -EBUSY; /* HW address is built into the device */
 }

 static const struct net_device_ops fake_ops = {
 	.ndo_open		= ieee802154_fake_open,
 	.ndo_stop		= ieee802154_fake_close,
 	.ndo_start_xmit		= ieee802154_fake_xmit,
 	.ndo_do_ioctl		= ieee802154_fake_ioctl,
 	.ndo_set_mac_address	= ieee802154_fake_mac_addr,
 };

 static void ieee802154_fake_destruct(struct net_device *dev)
 {
 	struct wpan_phy *phy = net_to_phy(dev);

 	wpan_phy_unregister(phy);
 	free_netdev(dev);
 	wpan_phy_free(phy);
 }

 static void ieee802154_fake_setup(struct net_device *dev)
 {
 	dev->addr_len		= IEEE802154_ADDR_LEN;
 	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
 	dev->features		= NETIF_F_NO_CSUM;
 	dev->needed_tailroom	= 2; /* FCS */
 	dev->mtu		= 127;
 	dev->tx_queue_len	= 10;
 	dev->type		= ARPHRD_IEEE802154;
 	dev->flags		= IFF_NOARP | IFF_BROADCAST;
 	dev->watchdog_timeo	= 0;
 	dev->destructor		= ieee802154_fake_destruct;
 }


 static int __devinit ieee802154fake_probe(struct platform_device *pdev)
 {
 	struct net_device *dev;
 	struct wpan_phy *phy = wpan_phy_alloc(0);
 	int err;

 	if (!phy)
 		return -ENOMEM;

 	dev = alloc_netdev(0, "hardwpan%d", ieee802154_fake_setup);
 	if (!dev) {
 		wpan_phy_free(phy);
 		return -ENOMEM;
 	}

 	phy->dev.platform_data = dev;

 	memcpy(dev->dev_addr, "\xba\xbe\xca\xfe\xde\xad\xbe\xef",
 			dev->addr_len);
 	memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);

 	phy->channels_supported = (1 << 27) - 1;
 	phy->transmit_power = 0xbf;

 	dev->netdev_ops = &fake_ops;
 	dev->ml_priv = &fake_mlme;

 	/*
 	 * If the name is a format string the caller wants us to do a
 	 * name allocation.
 	 */
 	if (strchr(dev->name, '%')) {
 		err = dev_alloc_name(dev, dev->name);
 		if (err < 0)
 			goto out;
 	}

 	SET_NETDEV_DEV(dev, &phy->dev);

 	platform_set_drvdata(pdev, dev);

 	err = wpan_phy_register(&pdev->dev, phy);
 	if (err)
 		goto out;

 	err = register_netdev(dev);
 	if (err < 0)
 		goto out;

 	dev_info(&pdev->dev, "Added ieee802154 HardMAC hardware\n");
 	return 0;

 out:
 	unregister_netdev(dev);
 	return err;
 }

 static int __devexit ieee802154fake_remove(struct platform_device *pdev)
 {
 	struct net_device *dev = platform_get_drvdata(pdev);
 	unregister_netdev(dev);
 	return 0;
 }

 static struct platform_device *ieee802154fake_dev;

 static struct platform_driver ieee802154fake_driver = {
 	.probe = ieee802154fake_probe,
 	.remove = __devexit_p(ieee802154fake_remove),
 	.driver = {
 			.name = "ieee802154hardmac",
 			.owner = THIS_MODULE,
 	},
 };

 static __init int fake_init(void)
 {
 	ieee802154fake_dev = platform_device_register_simple(
 			"ieee802154hardmac", -1, NULL, 0);
 	return platform_driver_register(&ieee802154fake_driver);
 }

 static __exit void fake_exit(void)
 {
 	platform_driver_unregister(&ieee802154fake_driver);
 	platform_device_unregister(ieee802154fake_dev);
 }

 module_init(fake_init);
 module_exit(fake_exit);
 MODULE_LICENSE("GPL");
	/*
	* Sample driver for HardMAC IEEE 802.15.4 devices
	*
	* Copyright (C) 2009 Siemens AG
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2
	* as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Written by:
	* Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
	*/
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/netdevice.h>
	#include <linux/skbuff.h>
	#include <linux/if_arp.h>

	#include <net/af_ieee802154.h>
	#include <net/ieee802154_netdev.h>
	#include <net/ieee802154.h>
	#include <net/nl802154.h>
	#include <net/wpan-phy.h>

	struct wpan_phy net_to_phy(struct net_device dev)
	{
	return container_of(dev->dev.parent, struct wpan_phy, dev);
	}

	/**
	* fake_get_pan_id - Retrieve the PAN ID of the device.
	* @dev: The network device to retrieve the PAN of.
	*
	* Return the ID of the PAN from the PIB.
	*/
	static u16 fake_get_pan_id(struct net_device *dev)
	{
	BUG_ON(dev->type != ARPHRD_IEEE802154);

	return 0xeba1;
	}

	/**
	* fake_get_short_addr - Retrieve the short address of the device.
	* @dev: The network device to retrieve the short address of.
	*
	* Returns the IEEE 802.15.4 short-form address cached for this
	* device. If the device has not yet had a short address assigned
	* then this should return 0xFFFF to indicate a lack of association.
	*/
	static u16 fake_get_short_addr(struct net_device *dev)
	{
	BUG_ON(dev->type != ARPHRD_IEEE802154);

	return 0x1;
	}

	/**
	* fake_get_dsn - Retrieve the DSN of the device.
	* @dev: The network device to retrieve the DSN for.
	*
	* Returns the IEEE 802.15.4 DSN for the network device.
	* The DSN is the sequence number which will be added to each
	* packet or MAC command frame by the MAC during transmission.
	*
	* DSN means 'Data Sequence Number'.
	*
	* Note: This is in section 7.2.1.2 of the IEEE 802.15.4-2006
	* document.
	*/
	static u8 fake_get_dsn(struct net_device *dev)
	{
	BUG_ON(dev->type != ARPHRD_IEEE802154);

	return 0x00; /* DSN are implemented in HW, so return just 0 */
	}

	/**
	* fake_get_bsn - Retrieve the BSN of the device.
	* @dev: The network device to retrieve the BSN for.
	*
	* Returns the IEEE 802.15.4 BSN for the network device.
	* The BSN is the sequence number which will be added to each
	* beacon frame sent by the MAC.
	*
	* BSN means 'Beacon Sequence Number'.
	*
	* Note: This is in section 7.2.1.2 of the IEEE 802.15.4-2006
	* document.
	*/
	static u8 fake_get_bsn(struct net_device *dev)
	{
	BUG_ON(dev->type != ARPHRD_IEEE802154);

	return 0x00; /* BSN are implemented in HW, so return just 0 */
	}

	/**
	* fake_assoc_req - Make an association request to the HW.
	* @dev: The network device which we are associating to a network.
	* @addr: The coordinator with which we wish to associate.
	* @channel: The channel on which to associate.
	* @cap: The capability information field to use in the association.
	*
	* Start an association with a coordinator. The coordinator's address
	* and PAN ID can be found in @addr.
	*
	* Note: This is in section 7.3.1 and 7.5.3.1 of the IEEE
	* 802.15.4-2006 document.
	*/
	static int fake_assoc_req(struct net_device *dev,
	struct ieee802154_addr *addr, u8 channel, u8 page, u8 cap)
	{
	struct wpan_phy *phy = net_to_phy(dev);

	mutex_lock(&phy->pib_lock);
	phy->current_channel = channel;
	phy->current_page = page;
	mutex_unlock(&phy->pib_lock);

	/* We simply emulate it here */
	return ieee802154_nl_assoc_confirm(dev, fake_get_short_addr(dev),
	IEEE802154_SUCCESS);
	}

	/**
	* fake_assoc_resp - Send an association response to a device.
	* @dev: The network device on which to send the response.
	* @addr: The address of the device to respond to.
	* @short_addr: The assigned short address for the device (if any).
	* @status: The result of the association request.
	*
	* Queue the association response of the coordinator to another
	* device's attempt to associate with the network which we
	* coordinate. This is then added to the indirect-send queue to be
	* transmitted to the end device when it polls for data.
	*
	* Note: This is in section 7.3.2 and 7.5.3.1 of the IEEE
	* 802.15.4-2006 document.
	*/
	static int fake_assoc_resp(struct net_device *dev,
	struct ieee802154_addr *addr, u16 short_addr, u8 status)
	{
	return 0;
	}

	/**
	* fake_disassoc_req - Disassociate a device from a network.
	* @dev: The network device on which we're disassociating a device.
	* @addr: The device to disassociate from the network.
	* @reason: The reason to give to the device for being disassociated.
	*
	* This sends a disassociation notification to the device being
	* disassociated from the network.
	*
	* Note: This is in section 7.5.3.2 of the IEEE 802.15.4-2006
	* document, with the reason described in 7.3.3.2.
	*/
	static int fake_disassoc_req(struct net_device *dev,
	struct ieee802154_addr *addr, u8 reason)
	{
	return ieee802154_nl_disassoc_confirm(dev, IEEE802154_SUCCESS);
	}

	/**
	* fake_start_req - Start an IEEE 802.15.4 PAN.
	* @dev: The network device on which to start the PAN.
	* @addr: The coordinator address to use when starting the PAN.
	* @channel: The channel on which to start the PAN.
	* @bcn_ord: Beacon order.
	* @sf_ord: Superframe order.
	* @pan_coord: Whether or not we are the PAN coordinator or just
	* requesting a realignment perhaps?
	* @blx: Battery Life Extension feature bitfield.
	* @coord_realign: Something to realign something else.
	*
	* If pan_coord is non-zero then this starts a network with the
	* provided parameters, otherwise it attempts a coordinator
	* realignment of the stated network instead.
	*
	* Note: This is in section 7.5.2.3 of the IEEE 802.15.4-2006
	* document, with 7.3.8 describing coordinator realignment.
	*/
	static int fake_start_req(struct net_device dev, struct ieee802154_addr addr,
	u8 channel, u8 page,
	u8 bcn_ord, u8 sf_ord, u8 pan_coord, u8 blx,
	u8 coord_realign)
	{
	struct wpan_phy *phy = net_to_phy(dev);

	mutex_lock(&phy->pib_lock);
	phy->current_channel = channel;
	phy->current_page = page;
	mutex_unlock(&phy->pib_lock);

	/* We don't emulate beacons here at all, so START should fail */
	ieee802154_nl_start_confirm(dev, IEEE802154_INVALID_PARAMETER);
	return 0;
	}

	/**
	* fake_scan_req - Start a channel scan.
	* @dev: The network device on which to perform a channel scan.
	* @type: The type of scan to perform.
	* @channels: The channel bitmask to scan.
	* @duration: How long to spend on each channel.
	*
	* This starts either a passive (energy) scan or an active (PAN) scan
	* on the channels indicated in the @channels bitmask. The duration of
	* the scan is measured in terms of superframe duration. Specifically,
	* the scan will spend aBaseSuperFrameDuration * ((2^n) + 1) on each
	* channel.
	*
	* Note: This is in section 7.5.2.1 of the IEEE 802.15.4-2006 document.
	*/
	static int fake_scan_req(struct net_device *dev, u8 type, u32 channels,
	u8 page, u8 duration)
	{
	u8 edl[27] = {};
	return ieee802154_nl_scan_confirm(dev, IEEE802154_SUCCESS, type,
	channels, page,
	type == IEEE802154_MAC_SCAN_ED ? edl : NULL);
	}

	static struct ieee802154_mlme_ops fake_mlme = {
	.assoc_req = fake_assoc_req,
	.assoc_resp = fake_assoc_resp,
	.disassoc_req = fake_disassoc_req,
	.start_req = fake_start_req,
	.scan_req = fake_scan_req,

	.get_pan_id = fake_get_pan_id,
	.get_short_addr = fake_get_short_addr,
	.get_dsn = fake_get_dsn,
	.get_bsn = fake_get_bsn,
	};

	static int ieee802154_fake_open(struct net_device *dev)
	{
	netif_start_queue(dev);
	return 0;
	}

	static int ieee802154_fake_close(struct net_device *dev)
	{
	netif_stop_queue(dev);
	return 0;
	}

	static netdev_tx_t ieee802154_fake_xmit(struct sk_buff *skb,
	struct net_device *dev)
	{
	dev->stats.tx_packets++;
	dev->stats.tx_bytes += skb->len;

	/* FIXME: do hardware work here ... */

	dev_kfree_skb(skb);
	return NETDEV_TX_OK;
	}


	static int ieee802154_fake_ioctl(struct net_device dev, struct ifreq ifr,
	int cmd)
	{
	struct sockaddr_ieee802154 *sa =
	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	u16 pan_id, short_addr;

	switch (cmd) {
	case SIOCGIFADDR:
	/* FIXME: fixed here, get from device IRL */
	pan_id = fake_get_pan_id(dev);
	short_addr = fake_get_short_addr(dev);
	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
	short_addr == IEEE802154_ADDR_BROADCAST)
	return -EADDRNOTAVAIL;

	sa->family = AF_IEEE802154;
	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
	sa->addr.pan_id = pan_id;
	sa->addr.short_addr = short_addr;
	return 0;
	}
	return -ENOIOCTLCMD;
	}

	static int ieee802154_fake_mac_addr(struct net_device dev, void p)
	{
	return -EBUSY; /* HW address is built into the device */
	}

	static const struct net_device_ops fake_ops = {
	.ndo_open = ieee802154_fake_open,
	.ndo_stop = ieee802154_fake_close,
	.ndo_start_xmit = ieee802154_fake_xmit,
	.ndo_do_ioctl = ieee802154_fake_ioctl,
	.ndo_set_mac_address = ieee802154_fake_mac_addr,
	};

	static void ieee802154_fake_destruct(struct net_device *dev)
	{
	struct wpan_phy *phy = net_to_phy(dev);

	wpan_phy_unregister(phy);
	free_netdev(dev);
	wpan_phy_free(phy);
	}

	static void ieee802154_fake_setup(struct net_device *dev)
	{
	dev->addr_len = IEEE802154_ADDR_LEN;
	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
	dev->features = NETIF_F_NO_CSUM;
	dev->needed_tailroom = 2; /* FCS */
	dev->mtu = 127;
	dev->tx_queue_len = 10;
	dev->type = ARPHRD_IEEE802154;
	dev->flags = IFF_NOARP \| IFF_BROADCAST;
	dev->watchdog_timeo = 0;
	dev->destructor = ieee802154_fake_destruct;
	}


	static int __devinit ieee802154fake_probe(struct platform_device *pdev)
	{
	struct net_device *dev;
	struct wpan_phy *phy = wpan_phy_alloc(0);
	int err;

	if (!phy)
	return -ENOMEM;

	dev = alloc_netdev(0, "hardwpan%d", ieee802154_fake_setup);
	if (!dev) {
	wpan_phy_free(phy);
	return -ENOMEM;
	}

	phy->dev.platform_data = dev;

	memcpy(dev->dev_addr, "\xba\xbe\xca\xfe\xde\xad\xbe\xef",
	dev->addr_len);
	memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);

	phy->channels_supported = (1 << 27) - 1;
	phy->transmit_power = 0xbf;

	dev->netdev_ops = &fake_ops;
	dev->ml_priv = &fake_mlme;

	/*
	* If the name is a format string the caller wants us to do a
	* name allocation.
	*/
	if (strchr(dev->name, '%')) {
	err = dev_alloc_name(dev, dev->name);
	if (err < 0)
	goto out;
	}

	SET_NETDEV_DEV(dev, &phy->dev);

	platform_set_drvdata(pdev, dev);

	err = wpan_phy_register(&pdev->dev, phy);
	if (err)
	goto out;

	err = register_netdev(dev);
	if (err < 0)
	goto out;

	dev_info(&pdev->dev, "Added ieee802154 HardMAC hardware\n");
	return 0;

	out:
	unregister_netdev(dev);
	return err;
	}

	static int __devexit ieee802154fake_remove(struct platform_device *pdev)
	{
	struct net_device *dev = platform_get_drvdata(pdev);
	unregister_netdev(dev);
	return 0;
	}

	static struct platform_device *ieee802154fake_dev;

	static struct platform_driver ieee802154fake_driver = {
	.probe = ieee802154fake_probe,
	.remove = __devexit_p(ieee802154fake_remove),
	.driver = {
	.name = "ieee802154hardmac",
	.owner = THIS_MODULE,
	},
	};

	static __init int fake_init(void)
	{
	ieee802154fake_dev = platform_device_register_simple(
	"ieee802154hardmac", -1, NULL, 0);
	return platform_driver_register(&ieee802154fake_driver);
	}

	static __exit void fake_exit(void)
	{
	platform_driver_unregister(&ieee802154fake_driver);
	platform_device_unregister(ieee802154fake_dev);
	}

	module_init(fake_init);
	module_exit(fake_exit);
	MODULE_LICENSE("GPL");