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drivers/ieee802154: IEEE 802.15.4 loopback driver
Add support for IEEE 802.15.4 loopback driver - useful development and debugging tool. Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
alex.bluesman.smirnov@gmail.com
David S. Miller
parent
0606069d9e
commit
e1e49b6413
@ -19,4 +19,12 @@ config IEEE802154_FAKEHARD
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This driver can also be built as a module. To do so say M here.
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The module will be called 'fakehard'.
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config IEEE802154_FAKELB
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depends on IEEE802154_DRIVERS && MAC802154
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tristate "IEEE 802.15.4 loopback driver"
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---help---
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Say Y here to enable the fake driver that can emulate a net
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of several interconnected radio devices.
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This driver can also be built as a module. To do so say M here.
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The module will be called 'fakelb'.
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@ -1 +1,2 @@
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obj-$(CONFIG_IEEE802154_FAKEHARD) += fakehard.o
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obj-$(CONFIG_IEEE802154_FAKELB) += fakelb.o
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294
drivers/ieee802154/fakelb.c
Normal file
294
drivers/ieee802154/fakelb.c
Normal file
@ -0,0 +1,294 @@
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/*
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* Loopback IEEE 802.15.4 interface
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*
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* Copyright 2007-2012 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Written by:
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* Sergey Lapin <slapin@ossfans.org>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/platform_device.h>
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#include <linux/netdevice.h>
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#include <linux/spinlock.h>
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#include <net/mac802154.h>
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#include <net/wpan-phy.h>
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static int numlbs = 1;
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struct fakelb_dev_priv {
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struct ieee802154_dev *dev;
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struct list_head list;
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struct fakelb_priv *fake;
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spinlock_t lock;
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bool working;
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};
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struct fakelb_priv {
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struct list_head list;
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rwlock_t lock;
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};
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static int
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fakelb_hw_ed(struct ieee802154_dev *dev, u8 *level)
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{
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might_sleep();
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BUG_ON(!level);
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*level = 0xbe;
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return 0;
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}
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static int
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fakelb_hw_channel(struct ieee802154_dev *dev, int page, int channel)
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{
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pr_debug("set channel to %d\n", channel);
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might_sleep();
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dev->phy->current_page = page;
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dev->phy->current_channel = channel;
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return 0;
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}
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static void
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fakelb_hw_deliver(struct fakelb_dev_priv *priv, struct sk_buff *skb)
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{
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struct sk_buff *newskb;
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spin_lock(&priv->lock);
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if (priv->working) {
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newskb = pskb_copy(skb, GFP_ATOMIC);
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ieee802154_rx_irqsafe(priv->dev, newskb, 0xcc);
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}
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spin_unlock(&priv->lock);
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}
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static int
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fakelb_hw_xmit(struct ieee802154_dev *dev, struct sk_buff *skb)
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{
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struct fakelb_dev_priv *priv = dev->priv;
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struct fakelb_priv *fake = priv->fake;
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might_sleep();
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read_lock_bh(&fake->lock);
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if (priv->list.next == priv->list.prev) {
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/* we are the only one device */
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fakelb_hw_deliver(priv, skb);
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} else {
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struct fakelb_dev_priv *dp;
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list_for_each_entry(dp, &priv->fake->list, list) {
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if (dp != priv &&
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(dp->dev->phy->current_channel ==
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priv->dev->phy->current_channel))
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fakelb_hw_deliver(dp, skb);
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}
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}
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read_unlock_bh(&fake->lock);
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return 0;
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}
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static int
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fakelb_hw_start(struct ieee802154_dev *dev) {
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struct fakelb_dev_priv *priv = dev->priv;
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int ret = 0;
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spin_lock(&priv->lock);
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if (priv->working)
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ret = -EBUSY;
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else
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priv->working = 1;
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spin_unlock(&priv->lock);
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return ret;
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}
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static void
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fakelb_hw_stop(struct ieee802154_dev *dev) {
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struct fakelb_dev_priv *priv = dev->priv;
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spin_lock(&priv->lock);
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priv->working = 0;
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spin_unlock(&priv->lock);
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}
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static struct ieee802154_ops fakelb_ops = {
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.owner = THIS_MODULE,
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.xmit = fakelb_hw_xmit,
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.ed = fakelb_hw_ed,
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.set_channel = fakelb_hw_channel,
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.start = fakelb_hw_start,
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.stop = fakelb_hw_stop,
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};
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/* Number of dummy devices to be set up by this module. */
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module_param(numlbs, int, 0);
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MODULE_PARM_DESC(numlbs, " number of pseudo devices");
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static int fakelb_add_one(struct device *dev, struct fakelb_priv *fake)
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{
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struct fakelb_dev_priv *priv;
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int err;
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struct ieee802154_dev *ieee;
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ieee = ieee802154_alloc_device(sizeof(*priv), &fakelb_ops);
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if (!ieee)
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return -ENOMEM;
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priv = ieee->priv;
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priv->dev = ieee;
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/* 868 MHz BPSK 802.15.4-2003 */
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ieee->phy->channels_supported[0] |= 1;
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/* 915 MHz BPSK 802.15.4-2003 */
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ieee->phy->channels_supported[0] |= 0x7fe;
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/* 2.4 GHz O-QPSK 802.15.4-2003 */
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ieee->phy->channels_supported[0] |= 0x7FFF800;
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/* 868 MHz ASK 802.15.4-2006 */
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ieee->phy->channels_supported[1] |= 1;
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/* 915 MHz ASK 802.15.4-2006 */
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ieee->phy->channels_supported[1] |= 0x7fe;
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/* 868 MHz O-QPSK 802.15.4-2006 */
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ieee->phy->channels_supported[2] |= 1;
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/* 915 MHz O-QPSK 802.15.4-2006 */
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ieee->phy->channels_supported[2] |= 0x7fe;
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/* 2.4 GHz CSS 802.15.4a-2007 */
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ieee->phy->channels_supported[3] |= 0x3fff;
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/* UWB Sub-gigahertz 802.15.4a-2007 */
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ieee->phy->channels_supported[4] |= 1;
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/* UWB Low band 802.15.4a-2007 */
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ieee->phy->channels_supported[4] |= 0x1e;
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/* UWB High band 802.15.4a-2007 */
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ieee->phy->channels_supported[4] |= 0xffe0;
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/* 750 MHz O-QPSK 802.15.4c-2009 */
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ieee->phy->channels_supported[5] |= 0xf;
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/* 750 MHz MPSK 802.15.4c-2009 */
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ieee->phy->channels_supported[5] |= 0xf0;
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/* 950 MHz BPSK 802.15.4d-2009 */
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ieee->phy->channels_supported[6] |= 0x3ff;
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/* 950 MHz GFSK 802.15.4d-2009 */
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ieee->phy->channels_supported[6] |= 0x3ffc00;
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INIT_LIST_HEAD(&priv->list);
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priv->fake = fake;
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spin_lock_init(&priv->lock);
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ieee->parent = dev;
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err = ieee802154_register_device(ieee);
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if (err)
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goto err_reg;
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write_lock_bh(&fake->lock);
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list_add_tail(&priv->list, &fake->list);
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write_unlock_bh(&fake->lock);
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return 0;
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err_reg:
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ieee802154_free_device(priv->dev);
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return err;
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}
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static void fakelb_del(struct fakelb_dev_priv *priv)
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{
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write_lock_bh(&priv->fake->lock);
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list_del(&priv->list);
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write_unlock_bh(&priv->fake->lock);
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ieee802154_unregister_device(priv->dev);
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ieee802154_free_device(priv->dev);
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}
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static int __devinit fakelb_probe(struct platform_device *pdev)
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{
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struct fakelb_priv *priv;
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struct fakelb_dev_priv *dp;
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int err = -ENOMEM;
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int i;
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priv = kzalloc(sizeof(struct fakelb_priv), GFP_KERNEL);
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if (!priv)
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goto err_alloc;
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INIT_LIST_HEAD(&priv->list);
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rwlock_init(&priv->lock);
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for (i = 0; i < numlbs; i++) {
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err = fakelb_add_one(&pdev->dev, priv);
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if (err < 0)
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goto err_slave;
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}
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platform_set_drvdata(pdev, priv);
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dev_info(&pdev->dev, "added ieee802154 hardware\n");
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return 0;
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err_slave:
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list_for_each_entry(dp, &priv->list, list)
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fakelb_del(dp);
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kfree(priv);
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err_alloc:
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return err;
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}
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static int __devexit fakelb_remove(struct platform_device *pdev)
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{
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struct fakelb_priv *priv = platform_get_drvdata(pdev);
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struct fakelb_dev_priv *dp, *temp;
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list_for_each_entry_safe(dp, temp, &priv->list, list)
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fakelb_del(dp);
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kfree(priv);
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return 0;
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}
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static struct platform_device *ieee802154fake_dev;
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static struct platform_driver ieee802154fake_driver = {
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.probe = fakelb_probe,
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.remove = __devexit_p(fakelb_remove),
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.driver = {
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.name = "ieee802154fakelb",
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.owner = THIS_MODULE,
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},
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};
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static __init int fakelb_init_module(void)
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{
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ieee802154fake_dev = platform_device_register_simple(
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"ieee802154fakelb", -1, NULL, 0);
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return platform_driver_register(&ieee802154fake_driver);
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}
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static __exit void fake_remove_module(void)
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{
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platform_driver_unregister(&ieee802154fake_driver);
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platform_device_unregister(ieee802154fake_dev);
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}
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module_init(fakelb_init_module);
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module_exit(fake_remove_module);
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MODULE_LICENSE("GPL");
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