/* * Loopback IEEE 802.15.4 interface * * Copyright 2007-2012 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: * Sergey Lapin * Dmitry Eremin-Solenikov * Alexander Smirnov */ #include #include #include #include #include #include #include static int numlbs = 1; struct fakelb_dev_priv { struct ieee802154_dev *dev; struct list_head list; struct fakelb_priv *fake; spinlock_t lock; bool working; }; struct fakelb_priv { struct list_head list; rwlock_t lock; }; static int fakelb_hw_ed(struct ieee802154_dev *dev, u8 *level) { might_sleep(); BUG_ON(!level); *level = 0xbe; return 0; } static int fakelb_hw_channel(struct ieee802154_dev *dev, int page, int channel) { pr_debug("set channel to %d\n", channel); might_sleep(); dev->phy->current_page = page; dev->phy->current_channel = channel; return 0; } static void fakelb_hw_deliver(struct fakelb_dev_priv *priv, struct sk_buff *skb) { struct sk_buff *newskb; spin_lock(&priv->lock); if (priv->working) { newskb = pskb_copy(skb, GFP_ATOMIC); ieee802154_rx_irqsafe(priv->dev, newskb, 0xcc); } spin_unlock(&priv->lock); } static int fakelb_hw_xmit(struct ieee802154_dev *dev, struct sk_buff *skb) { struct fakelb_dev_priv *priv = dev->priv; struct fakelb_priv *fake = priv->fake; might_sleep(); read_lock_bh(&fake->lock); if (priv->list.next == priv->list.prev) { /* we are the only one device */ fakelb_hw_deliver(priv, skb); } else { struct fakelb_dev_priv *dp; list_for_each_entry(dp, &priv->fake->list, list) { if (dp != priv && (dp->dev->phy->current_channel == priv->dev->phy->current_channel)) fakelb_hw_deliver(dp, skb); } } read_unlock_bh(&fake->lock); return 0; } static int fakelb_hw_start(struct ieee802154_dev *dev) { struct fakelb_dev_priv *priv = dev->priv; int ret = 0; spin_lock(&priv->lock); if (priv->working) ret = -EBUSY; else priv->working = 1; spin_unlock(&priv->lock); return ret; } static void fakelb_hw_stop(struct ieee802154_dev *dev) { struct fakelb_dev_priv *priv = dev->priv; spin_lock(&priv->lock); priv->working = 0; spin_unlock(&priv->lock); } static struct ieee802154_ops fakelb_ops = { .owner = THIS_MODULE, .xmit = fakelb_hw_xmit, .ed = fakelb_hw_ed, .set_channel = fakelb_hw_channel, .start = fakelb_hw_start, .stop = fakelb_hw_stop, }; /* Number of dummy devices to be set up by this module. */ module_param(numlbs, int, 0); MODULE_PARM_DESC(numlbs, " number of pseudo devices"); static int fakelb_add_one(struct device *dev, struct fakelb_priv *fake) { struct fakelb_dev_priv *priv; int err; struct ieee802154_dev *ieee; ieee = ieee802154_alloc_device(sizeof(*priv), &fakelb_ops); if (!ieee) return -ENOMEM; priv = ieee->priv; priv->dev = ieee; /* 868 MHz BPSK 802.15.4-2003 */ ieee->phy->channels_supported[0] |= 1; /* 915 MHz BPSK 802.15.4-2003 */ ieee->phy->channels_supported[0] |= 0x7fe; /* 2.4 GHz O-QPSK 802.15.4-2003 */ ieee->phy->channels_supported[0] |= 0x7FFF800; /* 868 MHz ASK 802.15.4-2006 */ ieee->phy->channels_supported[1] |= 1; /* 915 MHz ASK 802.15.4-2006 */ ieee->phy->channels_supported[1] |= 0x7fe; /* 868 MHz O-QPSK 802.15.4-2006 */ ieee->phy->channels_supported[2] |= 1; /* 915 MHz O-QPSK 802.15.4-2006 */ ieee->phy->channels_supported[2] |= 0x7fe; /* 2.4 GHz CSS 802.15.4a-2007 */ ieee->phy->channels_supported[3] |= 0x3fff; /* UWB Sub-gigahertz 802.15.4a-2007 */ ieee->phy->channels_supported[4] |= 1; /* UWB Low band 802.15.4a-2007 */ ieee->phy->channels_supported[4] |= 0x1e; /* UWB High band 802.15.4a-2007 */ ieee->phy->channels_supported[4] |= 0xffe0; /* 750 MHz O-QPSK 802.15.4c-2009 */ ieee->phy->channels_supported[5] |= 0xf; /* 750 MHz MPSK 802.15.4c-2009 */ ieee->phy->channels_supported[5] |= 0xf0; /* 950 MHz BPSK 802.15.4d-2009 */ ieee->phy->channels_supported[6] |= 0x3ff; /* 950 MHz GFSK 802.15.4d-2009 */ ieee->phy->channels_supported[6] |= 0x3ffc00; INIT_LIST_HEAD(&priv->list); priv->fake = fake; spin_lock_init(&priv->lock); ieee->parent = dev; err = ieee802154_register_device(ieee); if (err) goto err_reg; write_lock_bh(&fake->lock); list_add_tail(&priv->list, &fake->list); write_unlock_bh(&fake->lock); return 0; err_reg: ieee802154_free_device(priv->dev); return err; } static void fakelb_del(struct fakelb_dev_priv *priv) { write_lock_bh(&priv->fake->lock); list_del(&priv->list); write_unlock_bh(&priv->fake->lock); ieee802154_unregister_device(priv->dev); ieee802154_free_device(priv->dev); } static int __devinit fakelb_probe(struct platform_device *pdev) { struct fakelb_priv *priv; struct fakelb_dev_priv *dp; int err = -ENOMEM; int i; priv = kzalloc(sizeof(struct fakelb_priv), GFP_KERNEL); if (!priv) goto err_alloc; INIT_LIST_HEAD(&priv->list); rwlock_init(&priv->lock); for (i = 0; i < numlbs; i++) { err = fakelb_add_one(&pdev->dev, priv); if (err < 0) goto err_slave; } platform_set_drvdata(pdev, priv); dev_info(&pdev->dev, "added ieee802154 hardware\n"); return 0; err_slave: list_for_each_entry(dp, &priv->list, list) fakelb_del(dp); kfree(priv); err_alloc: return err; } static int __devexit fakelb_remove(struct platform_device *pdev) { struct fakelb_priv *priv = platform_get_drvdata(pdev); struct fakelb_dev_priv *dp, *temp; list_for_each_entry_safe(dp, temp, &priv->list, list) fakelb_del(dp); kfree(priv); return 0; } static struct platform_device *ieee802154fake_dev; static struct platform_driver ieee802154fake_driver = { .probe = fakelb_probe, .remove = __devexit_p(fakelb_remove), .driver = { .name = "ieee802154fakelb", .owner = THIS_MODULE, }, }; static __init int fakelb_init_module(void) { ieee802154fake_dev = platform_device_register_simple( "ieee802154fakelb", -1, NULL, 0); return platform_driver_register(&ieee802154fake_driver); } static __exit void fake_remove_module(void) { platform_driver_unregister(&ieee802154fake_driver); platform_device_unregister(ieee802154fake_dev); } module_init(fakelb_init_module); module_exit(fake_remove_module); MODULE_LICENSE("GPL");