LXR linux/drivers/net/usb/asix

   1/*
   2 * ASIX AX8817X based USB 2.0 Ethernet Devices
   3 * Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
   4 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
   5 * Copyright (C) 2006 James Painter <jamie.painter@iname.com>
   6 * Copyright (c) 2002-2003 TiVo Inc.
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21 */
  22
  23#include "asix.h"
  24
  25int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  26                  u16 size, void *data)
  27{
  28        void *buf;
  29        int err = -ENOMEM;
  30
  31        netdev_dbg(dev->net, "asix_read_cmd() cmd=0x%02x value=0x%04x index=0x%04x size=%d\n",
  32                   cmd, value, index, size);
  33
  34        buf = kmalloc(size, GFP_KERNEL);
  35        if (!buf)
  36                goto out;
  37
  38        err = usb_control_msg(
  39                dev->udev,
  40                usb_rcvctrlpipe(dev->udev, 0),
  41                cmd,
  42                USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  43                value,
  44                index,
  45                buf,
  46                size,
  47                USB_CTRL_GET_TIMEOUT);
  48        if (err == size)
  49                memcpy(data, buf, size);
  50        else if (err >= 0)
  51                err = -EINVAL;
  52        kfree(buf);
  53
  54out:
  55        return err;
  56}
  57
  58int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  59                   u16 size, void *data)
  60{
  61        void *buf = NULL;
  62        int err = -ENOMEM;
  63
  64        netdev_dbg(dev->net, "asix_write_cmd() cmd=0x%02x value=0x%04x index=0x%04x size=%d\n",
  65                   cmd, value, index, size);
  66
  67        if (data) {
  68                buf = kmemdup(data, size, GFP_KERNEL);
  69                if (!buf)
  70                        goto out;
  71        }
  72
  73        err = usb_control_msg(
  74                dev->udev,
  75                usb_sndctrlpipe(dev->udev, 0),
  76                cmd,
  77                USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  78                value,
  79                index,
  80                buf,
  81                size,
  82                USB_CTRL_SET_TIMEOUT);
  83        kfree(buf);
  84
  85out:
  86        return err;
  87}
  88
  89static void asix_async_cmd_callback(struct urb *urb)
  90{
  91        struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
  92        int status = urb->status;
  93
  94        if (status < 0)
  95                printk(KERN_DEBUG "asix_async_cmd_callback() failed with %d",
  96                        status);
  97
  98        kfree(req);
  99        usb_free_urb(urb);
 100}
 101
 102void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
 103                          u16 size, void *data)
 104{
 105        struct usb_ctrlrequest *req;
 106        int status;
 107        struct urb *urb;
 108
 109        netdev_dbg(dev->net, "asix_write_cmd_async() cmd=0x%02x value=0x%04x index=0x%04x size=%d\n",
 110                   cmd, value, index, size);
 111
 112        urb = usb_alloc_urb(0, GFP_ATOMIC);
 113        if (!urb) {
 114                netdev_err(dev->net, "Error allocating URB in write_cmd_async!\n");
 115                return;
 116        }
 117
 118        req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
 119        if (!req) {
 120                netdev_err(dev->net, "Failed to allocate memory for control request\n");
 121                usb_free_urb(urb);
 122                return;
 123        }
 124
 125        req->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
 126        req->bRequest = cmd;
 127        req->wValue = cpu_to_le16(value);
 128        req->wIndex = cpu_to_le16(index);
 129        req->wLength = cpu_to_le16(size);
 130
 131        usb_fill_control_urb(urb, dev->udev,
 132                             usb_sndctrlpipe(dev->udev, 0),
 133                             (void *)req, data, size,
 134                             asix_async_cmd_callback, req);
 135
 136        status = usb_submit_urb(urb, GFP_ATOMIC);
 137        if (status < 0) {
 138                netdev_err(dev->net, "Error submitting the control message: status=%d\n",
 139                           status);
 140                kfree(req);
 141                usb_free_urb(urb);
 142        }
 143}
 144
 145int asix_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 146{
 147        int offset = 0;
 148
 149        while (offset + sizeof(u32) < skb->len) {
 150                struct sk_buff *ax_skb;
 151                u16 size;
 152                u32 header = get_unaligned_le32(skb->data + offset);
 153
 154                offset += sizeof(u32);
 155
 156                /* get the packet length */
 157                size = (u16) (header & 0x7ff);
 158                if (size != ((~header >> 16) & 0x07ff)) {
 159                        netdev_err(dev->net, "asix_rx_fixup() Bad Header Length\n");
 160                        return 0;
 161                }
 162
 163                if ((size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) ||
 164                    (size + offset > skb->len)) {
 165                        netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
 166                                   size);
 167                        return 0;
 168                }
 169                ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
 170                if (!ax_skb)
 171                        return 0;
 172
 173                skb_put(ax_skb, size);
 174                memcpy(ax_skb->data, skb->data + offset, size);
 175                usbnet_skb_return(dev, ax_skb);
 176
 177                offset += (size + 1) & 0xfffe;
 178        }
 179
 180        if (skb->len != offset) {
 181                netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d\n",
 182                           skb->len);
 183                return 0;
 184        }
 185        return 1;
 186}
 187
 188struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 189                              gfp_t flags)
 190{
 191        int padlen;
 192        int headroom = skb_headroom(skb);
 193        int tailroom = skb_tailroom(skb);
 194        u32 packet_len;
 195        u32 padbytes = 0xffff0000;
 196
 197        padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4;
 198
 199        /* We need to push 4 bytes in front of frame (packet_len)
 200         * and maybe add 4 bytes after the end (if padlen is 4)
 201         *
 202         * Avoid skb_copy_expand() expensive call, using following rules :
 203         * - We are allowed to push 4 bytes in headroom if skb_header_cloned()
 204         *   is false (and if we have 4 bytes of headroom)
 205         * - We are allowed to put 4 bytes at tail if skb_cloned()
 206         *   is false (and if we have 4 bytes of tailroom)
 207         *
 208         * TCP packets for example are cloned, but skb_header_release()
 209         * was called in tcp stack, allowing us to use headroom for our needs.
 210         */
 211        if (!skb_header_cloned(skb) &&
 212            !(padlen && skb_cloned(skb)) &&
 213            headroom + tailroom >= 4 + padlen) {
 214                /* following should not happen, but better be safe */
 215                if (headroom < 4 ||
 216                    tailroom < padlen) {
 217                        skb->data = memmove(skb->head + 4, skb->data, skb->len);
 218                        skb_set_tail_pointer(skb, skb->len);
 219                }
 220        } else {
 221                struct sk_buff *skb2;
 222
 223                skb2 = skb_copy_expand(skb, 4, padlen, flags);
 224                dev_kfree_skb_any(skb);
 225                skb = skb2;
 226                if (!skb)
 227                        return NULL;
 228        }
 229
 230        packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
 231        skb_push(skb, 4);
 232        cpu_to_le32s(&packet_len);
 233        skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
 234
 235        if (padlen) {
 236                cpu_to_le32s(&padbytes);
 237                memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
 238                skb_put(skb, sizeof(padbytes));
 239        }
 240        return skb;
 241}
 242
 243int asix_set_sw_mii(struct usbnet *dev)
 244{
 245        int ret;
 246        ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
 247        if (ret < 0)
 248                netdev_err(dev->net, "Failed to enable software MII access\n");
 249        return ret;
 250}
 251
 252int asix_set_hw_mii(struct usbnet *dev)
 253{
 254        int ret;
 255        ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
 256        if (ret < 0)
 257                netdev_err(dev->net, "Failed to enable hardware MII access\n");
 258        return ret;
 259}
 260
 261int asix_read_phy_addr(struct usbnet *dev, int internal)
 262{
 263        int offset = (internal ? 1 : 0);
 264        u8 buf[2];
 265        int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
 266
 267        netdev_dbg(dev->net, "asix_get_phy_addr()\n");
 268
 269        if (ret < 0) {
 270                netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
 271                goto out;
 272        }
 273        netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
 274                   *((__le16 *)buf));
 275        ret = buf[offset];
 276
 277out:
 278        return ret;
 279}
 280
 281int asix_get_phy_addr(struct usbnet *dev)
 282{
 283        /* return the address of the internal phy */
 284        return asix_read_phy_addr(dev, 1);
 285}
 286
 287
 288int asix_sw_reset(struct usbnet *dev, u8 flags)
 289{
 290        int ret;
 291
 292        ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL);
 293        if (ret < 0)
 294                netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);
 295
 296        return ret;
 297}
 298
 299u16 asix_read_rx_ctl(struct usbnet *dev)
 300{
 301        __le16 v;
 302        int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v);
 303
 304        if (ret < 0) {
 305                netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
 306                goto out;
 307        }
 308        ret = le16_to_cpu(v);
 309out:
 310        return ret;
 311}
 312
 313int asix_write_rx_ctl(struct usbnet *dev, u16 mode)
 314{
 315        int ret;
 316
 317        netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
 318        ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
 319        if (ret < 0)
 320                netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
 321                           mode, ret);
 322
 323        return ret;
 324}
 325
 326u16 asix_read_medium_status(struct usbnet *dev)
 327{
 328        __le16 v;
 329        int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
 330
 331        if (ret < 0) {
 332                netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
 333                           ret);
 334                return ret;     /* TODO: callers not checking for error ret */
 335        }
 336
 337        return le16_to_cpu(v);
 338
 339}
 340
 341int asix_write_medium_mode(struct usbnet *dev, u16 mode)
 342{
 343        int ret;
 344
 345        netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
 346        ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
 347        if (ret < 0)
 348                netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
 349                           mode, ret);
 350
 351        return ret;
 352}
 353
 354int asix_write_gpio(struct usbnet *dev, u16 value, int sleep)
 355{
 356        int ret;
 357
 358        netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
 359        ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL);
 360        if (ret < 0)
 361                netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
 362                           value, ret);
 363
 364        if (sleep)
 365                msleep(sleep);
 366
 367        return ret;
 368}
 369
 370/*
 371 * AX88772 & AX88178 have a 16-bit RX_CTL value
 372 */
 373void asix_set_multicast(struct net_device *net)
 374{
 375        struct usbnet *dev = netdev_priv(net);
 376        struct asix_data *data = (struct asix_data *)&dev->data;
 377        u16 rx_ctl = AX_DEFAULT_RX_CTL;
 378
 379        if (net->flags & IFF_PROMISC) {
 380                rx_ctl |= AX_RX_CTL_PRO;
 381        } else if (net->flags & IFF_ALLMULTI ||
 382                   netdev_mc_count(net) > AX_MAX_MCAST) {
 383                rx_ctl |= AX_RX_CTL_AMALL;
 384        } else if (netdev_mc_empty(net)) {
 385                /* just broadcast and directed */
 386        } else {
 387                /* We use the 20 byte dev->data
 388                 * for our 8 byte filter buffer
 389                 * to avoid allocating memory that
 390                 * is tricky to free later */
 391                struct netdev_hw_addr *ha;
 392                u32 crc_bits;
 393
 394                memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
 395
 396                /* Build the multicast hash filter. */
 397                netdev_for_each_mc_addr(ha, net) {
 398                        crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
 399                        data->multi_filter[crc_bits >> 3] |=
 400                            1 << (crc_bits & 7);
 401                }
 402
 403                asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
 404                                   AX_MCAST_FILTER_SIZE, data->multi_filter);
 405
 406                rx_ctl |= AX_RX_CTL_AM;
 407        }
 408
 409        asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
 410}
 411
 412int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
 413{
 414        struct usbnet *dev = netdev_priv(netdev);
 415        __le16 res;
 416
 417        mutex_lock(&dev->phy_mutex);
 418        asix_set_sw_mii(dev);
 419        asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
 420                                (__u16)loc, 2, &res);
 421        asix_set_hw_mii(dev);
 422        mutex_unlock(&dev->phy_mutex);
 423
 424        netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
 425                   phy_id, loc, le16_to_cpu(res));
 426
 427        return le16_to_cpu(res);
 428}
 429
 430void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
 431{
 432        struct usbnet *dev = netdev_priv(netdev);
 433        __le16 res = cpu_to_le16(val);
 434
 435        netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
 436                   phy_id, loc, val);
 437        mutex_lock(&dev->phy_mutex);
 438        asix_set_sw_mii(dev);
 439        asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
 440        asix_set_hw_mii(dev);
 441        mutex_unlock(&dev->phy_mutex);
 442}
 443
 444void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 445{
 446        struct usbnet *dev = netdev_priv(net);
 447        u8 opt;
 448
 449        if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
 450                wolinfo->supported = 0;
 451                wolinfo->wolopts = 0;
 452                return;
 453        }
 454        wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
 455        wolinfo->wolopts = 0;
 456        if (opt & AX_MONITOR_LINK)
 457                wolinfo->wolopts |= WAKE_PHY;
 458        if (opt & AX_MONITOR_MAGIC)
 459                wolinfo->wolopts |= WAKE_MAGIC;
 460}
 461
 462int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 463{
 464        struct usbnet *dev = netdev_priv(net);
 465        u8 opt = 0;
 466
 467        if (wolinfo->wolopts & WAKE_PHY)
 468                opt |= AX_MONITOR_LINK;
 469        if (wolinfo->wolopts & WAKE_MAGIC)
 470                opt |= AX_MONITOR_MAGIC;
 471
 472        if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
 473                              opt, 0, 0, NULL) < 0)
 474                return -EINVAL;
 475
 476        return 0;
 477}
 478
 479int asix_get_eeprom_len(struct net_device *net)
 480{
 481        return AX_EEPROM_LEN;
 482}
 483
 484int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
 485                    u8 *data)
 486{
 487        struct usbnet *dev = netdev_priv(net);
 488        u16 *eeprom_buff;
 489        int first_word, last_word;
 490        int i;
 491
 492        if (eeprom->len == 0)
 493                return -EINVAL;
 494
 495        eeprom->magic = AX_EEPROM_MAGIC;
 496
 497        first_word = eeprom->offset >> 1;
 498        last_word = (eeprom->offset + eeprom->len - 1) >> 1;
 499
 500        eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
 501                              GFP_KERNEL);
 502        if (!eeprom_buff)
 503                return -ENOMEM;
 504
 505        /* ax8817x returns 2 bytes from eeprom on read */
 506        for (i = first_word; i <= last_word; i++) {
 507                if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
 508                                  &(eeprom_buff[i - first_word])) < 0) {
 509                        kfree(eeprom_buff);
 510                        return -EIO;
 511                }
 512        }
 513
 514        memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
 515        kfree(eeprom_buff);
 516        return 0;
 517}
 518
 519int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
 520                    u8 *data)
 521{
 522        struct usbnet *dev = netdev_priv(net);
 523        u16 *eeprom_buff;
 524        int first_word, last_word;
 525        int i;
 526        int ret;
 527
 528        netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
 529                   eeprom->len, eeprom->offset, eeprom->magic);
 530
 531        if (eeprom->len == 0)
 532                return -EINVAL;
 533
 534        if (eeprom->magic != AX_EEPROM_MAGIC)
 535                return -EINVAL;
 536
 537        first_word = eeprom->offset >> 1;
 538        last_word = (eeprom->offset + eeprom->len - 1) >> 1;
 539
 540        eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
 541                              GFP_KERNEL);
 542        if (!eeprom_buff)
 543                return -ENOMEM;
 544
 545        /* align data to 16 bit boundaries, read the missing data from
 546           the EEPROM */
 547        if (eeprom->offset & 1) {
 548                ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
 549                                    &(eeprom_buff[0]));
 550                if (ret < 0) {
 551                        netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
 552                        goto free;
 553                }
 554        }
 555
 556        if ((eeprom->offset + eeprom->len) & 1) {
 557                ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
 558                                    &(eeprom_buff[last_word - first_word]));
 559                if (ret < 0) {
 560                        netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
 561                        goto free;
 562                }
 563        }
 564
 565        memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);
 566
 567        /* write data to EEPROM */
 568        ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL);
 569        if (ret < 0) {
 570                netdev_err(net, "Failed to enable EEPROM write\n");
 571                goto free;
 572        }
 573        msleep(20);
 574
 575        for (i = first_word; i <= last_word; i++) {
 576                netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
 577                           i, eeprom_buff[i - first_word]);
 578                ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
 579                                     eeprom_buff[i - first_word], 0, NULL);
 580                if (ret < 0) {
 581                        netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
 582                                   i);
 583                        goto free;
 584                }
 585                msleep(20);
 586        }
 587
 588        ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL);
 589        if (ret < 0) {
 590                netdev_err(net, "Failed to disable EEPROM write\n");
 591                goto free;
 592        }
 593
 594        ret = 0;
 595free:
 596        kfree(eeprom_buff);
 597        return ret;
 598}
 599
 600void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 601{
 602        /* Inherit standard device info */
 603        usbnet_get_drvinfo(net, info);
 604        strncpy (info->driver, DRIVER_NAME, sizeof info->driver);
 605        strncpy (info->version, DRIVER_VERSION, sizeof info->version);
 606        info->eedump_len = AX_EEPROM_LEN;
 607}
 608
 609int asix_set_mac_address(struct net_device *net, void *p)
 610{
 611        struct usbnet *dev = netdev_priv(net);
 612        struct asix_data *data = (struct asix_data *)&dev->data;
 613        struct sockaddr *addr = p;
 614
 615        if (netif_running(net))
 616                return -EBUSY;
 617        if (!is_valid_ether_addr(addr->sa_data))
 618                return -EADDRNOTAVAIL;
 619
 620        memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
 621
 622        /* We use the 20 byte dev->data
 623         * for our 6 byte mac buffer
 624         * to avoid allocating memory that
 625         * is tricky to free later */
 626        memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
 627        asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
 628                                                        data->mac_addr);
 629
 630        return 0;
 631}
 632