1 files changed, 448 insertions, 0 deletions
diff --git a/drivers/net/ieee802154/fakehard.c b/drivers/net/ieee802154/fakehard.c
new file mode 100644
index 000000000000..7d39add7d467
--- /dev/null
+++ b/drivers/net/ieee802154/fakehard.c
@@ -0,0 +1,448 @@
+/*
+ * 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 fakehard_priv {
+	struct wpan_phy *phy;
+};
+
+static struct wpan_phy *fake_to_phy(const struct net_device *dev)
+{
+	struct fakehard_priv *priv = netdev_priv(dev);
+	return priv->phy;
+}
+
+/**
+ * fake_get_phy - Return a phy corresponding to this device.
+ * @dev: The network device for which to return the wan-phy object
+ *
+ * This function returns a wpan-phy object corresponding to the passed
+ * network device. Reference counter for wpan-phy object is incremented,
+ * so when the wpan-phy isn't necessary, you should drop the reference
+ * via @wpan_phy_put() call.
+ */
+static struct wpan_phy *fake_get_phy(const struct net_device *dev)
+{
+	struct wpan_phy *phy = fake_to_phy(dev);
+	return to_phy(get_device(&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(const 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(const 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(const 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(const 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 = fake_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 = fake_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_phy = fake_get_phy,
+
+	.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 = fake_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_HW_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 fakehard_priv *priv;
+	struct wpan_phy *phy = wpan_phy_alloc(0);
+	int err;
+
+	if (!phy)
+		return -ENOMEM;
+
+	dev = alloc_netdev(sizeof(struct fakehard_priv), "hardwpan%d", ieee802154_fake_setup);
+	if (!dev) {
+		wpan_phy_free(phy);
+		return -ENOMEM;
+	}
+
+	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);
+
+	/*
+	 * For now we'd like to emulate 2.4 GHz-only device,
+	 * both O-QPSK and CSS
+	 */
+	/* 2.4 GHz O-QPSK 802.15.4-2003 */
+	phy->channels_supported[0] |= 0x7FFF800;
+	/* 2.4 GHz CSS 802.15.4a-2007 */
+	phy->channels_supported[3] |= 0x3fff;
+
+	phy->transmit_power = 0xbf;
+
+	dev->netdev_ops = &fake_ops;
+	dev->ml_priv = &fake_mlme;
+
+	priv = netdev_priv(dev);
+	priv->phy = phy;
+
+	wpan_phy_set_dev(phy, &pdev->dev);
+	SET_NETDEV_DEV(dev, &phy->dev);
+
+	platform_set_drvdata(pdev, dev);
+
+	err = wpan_phy_register(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");