File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/net/ieee802154/fakelb.c b/drivers/net/ieee802154/fakelb.c
new file mode 100644
index 0000000..43617de
--- /dev/null
+++ b/drivers/net/ieee802154/fakelb.c
@@ -0,0 +1,260 @@
+/*
+ * 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.
+ *
+ * Written by:
+ * Sergey Lapin <slapin@ossfans.org>
+ * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+ * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/platform_device.h>
+#include <linux/netdevice.h>
+#include <linux/device.h>
+#include <linux/spinlock.h>
+#include <net/mac802154.h>
+#include <net/cfg802154.h>
+
+static int numlbs = 2;
+
+static LIST_HEAD(fakelb_phys);
+static DEFINE_MUTEX(fakelb_phys_lock);
+
+static LIST_HEAD(fakelb_ifup_phys);
+static DEFINE_RWLOCK(fakelb_ifup_phys_lock);
+
+struct fakelb_phy {
+ struct ieee802154_hw *hw;
+
+ u8 page;
+ u8 channel;
+
+ bool suspended;
+
+ struct list_head list;
+ struct list_head list_ifup;
+};
+
+static int fakelb_hw_ed(struct ieee802154_hw *hw, u8 *level)
+{
+ BUG_ON(!level);
+ *level = 0xbe;
+
+ return 0;
+}
+
+static int fakelb_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
+{
+ struct fakelb_phy *phy = hw->priv;
+
+ write_lock_bh(&fakelb_ifup_phys_lock);
+ phy->page = page;
+ phy->channel = channel;
+ write_unlock_bh(&fakelb_ifup_phys_lock);
+ return 0;
+}
+
+static int fakelb_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
+{
+ struct fakelb_phy *current_phy = hw->priv, *phy;
+
+ read_lock_bh(&fakelb_ifup_phys_lock);
+ WARN_ON(current_phy->suspended);
+ list_for_each_entry(phy, &fakelb_ifup_phys, list_ifup) {
+ if (current_phy == phy)
+ continue;
+
+ if (current_phy->page == phy->page &&
+ current_phy->channel == phy->channel) {
+ struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC);
+
+ if (newskb)
+ ieee802154_rx_irqsafe(phy->hw, newskb, 0xcc);
+ }
+ }
+ read_unlock_bh(&fakelb_ifup_phys_lock);
+
+ ieee802154_xmit_complete(hw, skb, false);
+ return 0;
+}
+
+static int fakelb_hw_start(struct ieee802154_hw *hw)
+{
+ struct fakelb_phy *phy = hw->priv;
+
+ write_lock_bh(&fakelb_ifup_phys_lock);
+ phy->suspended = false;
+ list_add(&phy->list_ifup, &fakelb_ifup_phys);
+ write_unlock_bh(&fakelb_ifup_phys_lock);
+
+ return 0;
+}
+
+static void fakelb_hw_stop(struct ieee802154_hw *hw)
+{
+ struct fakelb_phy *phy = hw->priv;
+
+ write_lock_bh(&fakelb_ifup_phys_lock);
+ phy->suspended = true;
+ list_del(&phy->list_ifup);
+ write_unlock_bh(&fakelb_ifup_phys_lock);
+}
+
+static const struct ieee802154_ops fakelb_ops = {
+ .owner = THIS_MODULE,
+ .xmit_async = 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 ieee802154_hw *hw;
+ struct fakelb_phy *phy;
+ int err;
+
+ hw = ieee802154_alloc_hw(sizeof(*phy), &fakelb_ops);
+ if (!hw)
+ return -ENOMEM;
+
+ phy = hw->priv;
+ phy->hw = hw;
+
+ /* 868 MHz BPSK 802.15.4-2003 */
+ hw->phy->supported.channels[0] |= 1;
+ /* 915 MHz BPSK 802.15.4-2003 */
+ hw->phy->supported.channels[0] |= 0x7fe;
+ /* 2.4 GHz O-QPSK 802.15.4-2003 */
+ hw->phy->supported.channels[0] |= 0x7FFF800;
+ /* 868 MHz ASK 802.15.4-2006 */
+ hw->phy->supported.channels[1] |= 1;
+ /* 915 MHz ASK 802.15.4-2006 */
+ hw->phy->supported.channels[1] |= 0x7fe;
+ /* 868 MHz O-QPSK 802.15.4-2006 */
+ hw->phy->supported.channels[2] |= 1;
+ /* 915 MHz O-QPSK 802.15.4-2006 */
+ hw->phy->supported.channels[2] |= 0x7fe;
+ /* 2.4 GHz CSS 802.15.4a-2007 */
+ hw->phy->supported.channels[3] |= 0x3fff;
+ /* UWB Sub-gigahertz 802.15.4a-2007 */
+ hw->phy->supported.channels[4] |= 1;
+ /* UWB Low band 802.15.4a-2007 */
+ hw->phy->supported.channels[4] |= 0x1e;
+ /* UWB High band 802.15.4a-2007 */
+ hw->phy->supported.channels[4] |= 0xffe0;
+ /* 750 MHz O-QPSK 802.15.4c-2009 */
+ hw->phy->supported.channels[5] |= 0xf;
+ /* 750 MHz MPSK 802.15.4c-2009 */
+ hw->phy->supported.channels[5] |= 0xf0;
+ /* 950 MHz BPSK 802.15.4d-2009 */
+ hw->phy->supported.channels[6] |= 0x3ff;
+ /* 950 MHz GFSK 802.15.4d-2009 */
+ hw->phy->supported.channels[6] |= 0x3ffc00;
+
+ ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
+ /* fake phy channel 13 as default */
+ hw->phy->current_channel = 13;
+ phy->channel = hw->phy->current_channel;
+
+ hw->parent = dev;
+
+ err = ieee802154_register_hw(hw);
+ if (err)
+ goto err_reg;
+
+ mutex_lock(&fakelb_phys_lock);
+ list_add_tail(&phy->list, &fakelb_phys);
+ mutex_unlock(&fakelb_phys_lock);
+
+ return 0;
+
+err_reg:
+ ieee802154_free_hw(phy->hw);
+ return err;
+}
+
+static void fakelb_del(struct fakelb_phy *phy)
+{
+ list_del(&phy->list);
+
+ ieee802154_unregister_hw(phy->hw);
+ ieee802154_free_hw(phy->hw);
+}
+
+static int fakelb_probe(struct platform_device *pdev)
+{
+ struct fakelb_phy *phy, *tmp;
+ int err, i;
+
+ for (i = 0; i < numlbs; i++) {
+ err = fakelb_add_one(&pdev->dev);
+ if (err < 0)
+ goto err_slave;
+ }
+
+ dev_info(&pdev->dev, "added ieee802154 hardware\n");
+ return 0;
+
+err_slave:
+ mutex_lock(&fakelb_phys_lock);
+ list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
+ fakelb_del(phy);
+ mutex_unlock(&fakelb_phys_lock);
+ return err;
+}
+
+static int fakelb_remove(struct platform_device *pdev)
+{
+ struct fakelb_phy *phy, *tmp;
+
+ mutex_lock(&fakelb_phys_lock);
+ list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
+ fakelb_del(phy);
+ mutex_unlock(&fakelb_phys_lock);
+ return 0;
+}
+
+static struct platform_device *ieee802154fake_dev;
+
+static struct platform_driver ieee802154fake_driver = {
+ .probe = fakelb_probe,
+ .remove = fakelb_remove,
+ .driver = {
+ .name = "ieee802154fakelb",
+ },
+};
+
+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");