mirror of https://gitee.com/openkylin/linux.git
427 lines
12 KiB
C
427 lines
12 KiB
C
/*
|
|
* 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 wpan_phy *net_to_phy(struct net_device *dev)
|
|
{
|
|
return container_of(dev->dev.parent, struct wpan_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(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(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(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(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 = net_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 = net_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_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 = net_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_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;
|
|
dev->destructor = ieee802154_fake_destruct;
|
|
}
|
|
|
|
|
|
static int __devinit ieee802154fake_probe(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev;
|
|
struct wpan_phy *phy = wpan_phy_alloc(0);
|
|
int err;
|
|
|
|
if (!phy)
|
|
return -ENOMEM;
|
|
|
|
dev = alloc_netdev(0, "hardwpan%d", ieee802154_fake_setup);
|
|
if (!dev) {
|
|
wpan_phy_free(phy);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
phy->dev.platform_data = dev;
|
|
|
|
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);
|
|
|
|
phy->channels_supported = (1 << 27) - 1;
|
|
phy->transmit_power = 0xbf;
|
|
|
|
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, &phy->dev);
|
|
|
|
platform_set_drvdata(pdev, dev);
|
|
|
|
err = wpan_phy_register(&pdev->dev, 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");
|
|
|