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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 | /* * 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 fakehard_priv { struct wpan_phy *phy; }; static struct wpan_phy *fake_to_phy(const struct net_device *dev) { struct fakehard_priv *priv = netdev_priv(dev); return priv->phy; } /** * fake_get_phy - Return a phy corresponding to this device. * @dev: The network device for which to return the wan-phy object * * This function returns a wpan-phy object corresponding to the passed * network device. Reference counter for wpan-phy object is incremented, * so when the wpan-phy isn't necessary, you should drop the reference * via @wpan_phy_put() call. */ static struct wpan_phy *fake_get_phy(const struct net_device *dev) { struct wpan_phy *phy = fake_to_phy(dev); return to_phy(get_device(&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(const 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(const 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(const struct net_device *dev) { BUG_ON(dev->type != ARPHRD_IEEE802154); return 0x00; /* DSN 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 = fake_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 = fake_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_phy = fake_get_phy, .get_pan_id = fake_get_pan_id, .get_short_addr = fake_get_short_addr, .get_dsn = fake_get_dsn, }; 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 = fake_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_HW_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 ieee802154fake_probe(struct platform_device *pdev) { struct net_device *dev; struct fakehard_priv *priv; struct wpan_phy *phy = wpan_phy_alloc(0); int err; if (!phy) return -ENOMEM; dev = alloc_netdev(sizeof(struct fakehard_priv), "hardwpan%d", ieee802154_fake_setup); if (!dev) { wpan_phy_free(phy); return -ENOMEM; } memcpy(dev->dev_addr, "\xba\xbe\xca\xfe\xde\xad\xbe\xef", dev->addr_len); /* * For now we'd like to emulate 2.4 GHz-only device, * both O-QPSK and CSS */ /* 2.4 GHz O-QPSK 802.15.4-2003 */ phy->channels_supported[0] |= 0x7FFF800; /* 2.4 GHz CSS 802.15.4a-2007 */ phy->channels_supported[3] |= 0x3fff; phy->transmit_power = 0xbf; dev->netdev_ops = &fake_ops; dev->ml_priv = &fake_mlme; priv = netdev_priv(dev); priv->phy = phy; wpan_phy_set_dev(phy, &pdev->dev); SET_NETDEV_DEV(dev, &phy->dev); platform_set_drvdata(pdev, dev); err = wpan_phy_register(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 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 = 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"); |