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    Subject[PATCH 05/10] ieee802154: add simple HardMAC driver sample
    Date
    fakehard is a really simple driver implementing only necessary
    callbacks and serves the role of an example of driver for HardMAC
    IEEE 802.15.4 device.

    Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
    Signed-off-by: Sergey Lapin <slapin@ossfans.org>
    ---
    drivers/Makefile | 1 +
    drivers/ieee802154/Kconfig | 23 ++++
    drivers/ieee802154/Makefile | 3 +
    drivers/ieee802154/fakehard.c | 253 +++++++++++++++++++++++++++++++++++++++++
    drivers/net/Kconfig | 2 +
    5 files changed, 282 insertions(+), 0 deletions(-)
    create mode 100644 drivers/ieee802154/Kconfig
    create mode 100644 drivers/ieee802154/Makefile
    create mode 100644 drivers/ieee802154/fakehard.c

    diff --git a/drivers/Makefile b/drivers/Makefile
    index 1266ead..9e7d4e5 100644
    --- a/drivers/Makefile
    +++ b/drivers/Makefile
    @@ -107,3 +107,4 @@ obj-$(CONFIG_SSB) += ssb/
    obj-$(CONFIG_VIRTIO) += virtio/
    obj-$(CONFIG_STAGING) += staging/
    obj-y += platform/
    +obj-y += ieee802154/
    diff --git a/drivers/ieee802154/Kconfig b/drivers/ieee802154/Kconfig
    new file mode 100644
    index 0000000..8610620
    --- /dev/null
    +++ b/drivers/ieee802154/Kconfig
    @@ -0,0 +1,23 @@
    +menuconfig IEEE802154_DRIVERS
    + bool "IEEE 802.15.4 drivers"
    + depends on NETDEVICES && IEEE802154
    + default y
    + ---help---
    + Say Y here to get to see options for IEEE 802.15.4 Low-Rate
    + Wireless Personal Area Network device drivers. This option alone
    + does not add any kernel code.
    +
    + If you say N, all options in this submenu will be skipped and disabled.
    +
    +config IEEE802154_FAKEHARD
    + tristate "Fake LR-WPAN driver with several interconnected devices"
    + depends on IEEE802154_DRIVERS
    + ---help---
    + Say Y here to enable the fake driver that serves as an example
    + of HardMAC device driver.
    +
    + This driver can also be built as a module. To do so say M here.
    + The module will be called 'fakehard'.
    +
    +endif
    +
    diff --git a/drivers/ieee802154/Makefile b/drivers/ieee802154/Makefile
    new file mode 100644
    index 0000000..e0e8e1a
    --- /dev/null
    +++ b/drivers/ieee802154/Makefile
    @@ -0,0 +1,3 @@
    +obj-$(CONFIG_IEEE802154_FAKEHARD) += fakehard.o
    +
    +EXTRA_CFLAGS += -DDEBUG -DCONFIG_FFD
    diff --git a/drivers/ieee802154/fakehard.c b/drivers/ieee802154/fakehard.c
    new file mode 100644
    index 0000000..e4c08ea
    --- /dev/null
    +++ b/drivers/ieee802154/fakehard.c
    @@ -0,0 +1,253 @@
    +/*
    + * 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/ieee802154/af_ieee802154.h>
    +#include <net/ieee802154/netdevice.h>
    +
    +static u16 fake_get_pan_id(struct net_device *dev)
    +{
    + BUG_ON(dev->type != ARPHRD_IEEE802154);
    +
    + return 0xeba1;
    +}
    +
    +static u16 fake_get_short_addr(struct net_device *dev)
    +{
    + BUG_ON(dev->type != ARPHRD_IEEE802154);
    +
    + return 0x1;
    +}
    +
    +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 */
    +}
    +
    +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 */
    +}
    +
    +static int fake_assoc_req(struct net_device *dev, struct ieee802154_addr *addr, u8 channel, u8 cap)
    +{
    + return 0;
    +}
    +
    +static int fake_assoc_resp(struct net_device *dev, struct ieee802154_addr *addr, u16 short_addr, u8 status)
    +{
    + return 0;
    +}
    +
    +static int fake_disassoc_req(struct net_device *dev, struct ieee802154_addr *addr, u8 reason)
    +{
    + return 0;
    +}
    +
    +static int fake_start_req(struct net_device *dev, struct ieee802154_addr *addr,
    + u8 channel,
    + u8 bcn_ord, u8 sf_ord, u8 pan_coord, u8 blx,
    + u8 coord_realign)
    +{
    + return 0;
    +}
    +
    +static int fake_scan_req(struct net_device *dev, u8 type, u32 channels, u8 duration)
    +{
    + return 0;
    +}
    +
    +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 int ieee802154_fake_xmit(struct sk_buff *skb, struct net_device *dev)
    +{
    + skb->iif = dev->ifindex;
    + skb->dev = dev;
    + dev->stats.tx_packets++;
    + dev->stats.tx_bytes += skb->len;
    +
    + dev->trans_start = jiffies;
    +
    + /* FIXME: do hardware work here ... */
    +
    + return 0;
    +}
    +
    +
    +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_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;
    +}
    +
    +
    +static int __devinit ieee802154fake_probe(struct platform_device *pdev)
    +{
    + struct net_device *dev = alloc_netdev(0, "hardwpan%d", ieee802154_fake_setup);
    + int err;
    +
    + if (!dev)
    + 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);
    +
    + 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, &pdev->dev);
    +
    + platform_set_drvdata(pdev, dev);
    +
    + err = register_netdevice(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);
    + free_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");
    +
    diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
    index 214a92d..ec8cf21 100644
    --- a/drivers/net/Kconfig
    +++ b/drivers/net/Kconfig
    @@ -2704,6 +2704,8 @@ source "drivers/net/wan/Kconfig"

    source "drivers/atm/Kconfig"

    +source "drivers/ieee802154/Kconfig"
    +
    source "drivers/s390/net/Kconfig"

    config XEN_NETDEV_FRONTEND
    --
    1.6.2.4


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