drivers/net/usb/asix_common.c

   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, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "asix.h"
  23
  24 int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  25                   u16 size, void *data)
  26 {
  27         int ret;
  28         ret = usbnet_read_cmd(dev, cmd,
  29                                USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  30                                value, index, data, size);
  31
  32         if (ret != size && ret >= 0)
  33                 return -EINVAL;
  34         return ret;
  35 }
  36
  37 int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  38                    u16 size, void *data)
  39 {
  40         return usbnet_write_cmd(dev, cmd,
  41                                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  42                                 value, index, data, size);
  43 }
  44
  45 void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  46                           u16 size, void *data)
  47 {
  48         usbnet_write_cmd_async(dev, cmd,
  49                                USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  50                                value, index, data, size);
  51 }
  52
  53 int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb,
  54                            struct asix_rx_fixup_info *rx)
  55 {
  56         int offset = 0;
  57         u16 size;
  58
  59         /* When an Ethernet frame spans multiple URB socket buffers,
  60          * do a sanity test for the Data header synchronisation.
  61          * Attempt to detect the situation of the previous socket buffer having
  62          * been truncated or a socket buffer was missing. These situations
  63          * cause a discontinuity in the data stream and therefore need to avoid
  64          * appending bad data to the end of the current netdev socket buffer.
  65          * Also avoid unnecessarily discarding a good current netdev socket
  66          * buffer.
  67          */
  68         if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) {
  69                 offset = ((rx->remaining + 1) & 0xfffe);
  70                 rx->header = get_unaligned_le32(skb->data + offset);
  71                 offset = 0;
  72
  73                 size = (u16)(rx->header & 0x7ff);
  74                 if (size != ((~rx->header >> 16) & 0x7ff)) {
  75                         netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n",
  76                                    rx->remaining);
  77                         if (rx->ax_skb) {
  78                                 kfree_skb(rx->ax_skb);
  79                                 rx->ax_skb = NULL;
  80                                 /* Discard the incomplete netdev Ethernet frame
  81                                  * and assume the Data header is at the start of
  82                                  * the current URB socket buffer.
  83                                  */
  84                         }
  85                         rx->remaining = 0;
  86                 }
  87         }
  88
  89         while (offset + sizeof(u16) <= skb->len) {
  90                 u16 copy_length;
  91                 unsigned char *data;
  92
  93                 if (!rx->remaining) {
  94                         if (skb->len - offset == sizeof(u16)) {
  95                                 rx->header = get_unaligned_le16(
  96                                                 skb->data + offset);
  97                                 rx->split_head = true;
  98                                 offset += sizeof(u16);
  99                                 break;
 100                         }
 101
 102                         if (rx->split_head == true) {
 103                                 rx->header |= (get_unaligned_le16(
 104                                                 skb->data + offset) << 16);
 105                                 rx->split_head = false;
 106                                 offset += sizeof(u16);
 107                         } else {
 108                                 rx->header = get_unaligned_le32(skb->data +
 109                                                                 offset);
 110                                 offset += sizeof(u32);
 111                         }
 112
 113                         /* take frame length from Data header 32-bit word */
 114                         size = (u16)(rx->header & 0x7ff);
 115                         if (size != ((~rx->header >> 16) & 0x7ff)) {
 116                                 netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
 117                                            rx->header, offset);
 118                                 return 0;
 119                         }
 120                         if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
 121                                 netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
 122                                            size);
 123                                 return 0;
 124                         }
 125
 126                         /* Sometimes may fail to get a netdev socket buffer but
 127                          * continue to process the URB socket buffer so that
 128                          * synchronisation of the Ethernet frame Data header
 129                          * word is maintained.
 130                          */
 131                         rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
 132
 133                         rx->remaining = size;
 134                 }
 135
 136                 if (rx->remaining > skb->len - offset) {
 137                         copy_length = skb->len - offset;
 138                         rx->remaining -= copy_length;
 139                 } else {
 140                         copy_length = rx->remaining;
 141                         rx->remaining = 0;
 142                 }
 143
 144                 if (rx->ax_skb) {
 145                         data = skb_put(rx->ax_skb, copy_length);
 146                         memcpy(data, skb->data + offset, copy_length);
 147                         if (!rx->remaining)
 148                                 usbnet_skb_return(dev, rx->ax_skb);
 149                 }
 150
 151                 offset += (copy_length + 1) & 0xfffe;
 152         }
 153
 154         if (skb->len != offset) {
 155                 netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n",
 156                            skb->len, offset);
 157                 return 0;
 158         }
 159
 160         return 1;
 161 }
 162
 163 int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb)
 164 {
 165         struct asix_common_private *dp = dev->driver_priv;
 166         struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
 167
 168         return asix_rx_fixup_internal(dev, skb, rx);
 169 }
 170
 171 struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 172                               gfp_t flags)
 173 {
 174         int padlen;
 175         int headroom = skb_headroom(skb);
 176         int tailroom = skb_tailroom(skb);
 177         u32 packet_len;
 178         u32 padbytes = 0xffff0000;
 179
 180         padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4;
 181
 182         /* We need to push 4 bytes in front of frame (packet_len)
 183          * and maybe add 4 bytes after the end (if padlen is 4)
 184          *
 185          * Avoid skb_copy_expand() expensive call, using following rules :
 186          * - We are allowed to push 4 bytes in headroom if skb_header_cloned()
 187          *   is false (and if we have 4 bytes of headroom)
 188          * - We are allowed to put 4 bytes at tail if skb_cloned()
 189          *   is false (and if we have 4 bytes of tailroom)
 190          *
 191          * TCP packets for example are cloned, but skb_header_release()
 192          * was called in tcp stack, allowing us to use headroom for our needs.
 193          */
 194         if (!skb_header_cloned(skb) &&
 195             !(padlen && skb_cloned(skb)) &&
 196             headroom + tailroom >= 4 + padlen) {
 197                 /* following should not happen, but better be safe */
 198                 if (headroom < 4 ||
 199                     tailroom < padlen) {
 200                         skb->data = memmove(skb->head + 4, skb->data, skb->len);
 201                         skb_set_tail_pointer(skb, skb->len);
 202                 }
 203         } else {
 204                 struct sk_buff *skb2;
 205
 206                 skb2 = skb_copy_expand(skb, 4, padlen, flags);
 207                 dev_kfree_skb_any(skb);
 208                 skb = skb2;
 209                 if (!skb)
 210                         return NULL;
 211         }
 212
 213         packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
 214         skb_push(skb, 4);
 215         cpu_to_le32s(&packet_len);
 216         skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
 217
 218         if (padlen) {
 219                 cpu_to_le32s(&padbytes);
 220                 memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
 221                 skb_put(skb, sizeof(padbytes));
 222         }
 223
 224         usbnet_set_skb_tx_stats(skb, 1, 0);
 225         return skb;
 226 }
 227
 228 int asix_set_sw_mii(struct usbnet *dev)
 229 {
 230         int ret;
 231         ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
 232         if (ret < 0)
 233                 netdev_err(dev->net, "Failed to enable software MII access\n");
 234         return ret;
 235 }
 236
 237 int asix_set_hw_mii(struct usbnet *dev)
 238 {
 239         int ret;
 240         ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
 241         if (ret < 0)
 242                 netdev_err(dev->net, "Failed to enable hardware MII access\n");
 243         return ret;
 244 }
 245
 246 int asix_read_phy_addr(struct usbnet *dev, int internal)
 247 {
 248         int offset = (internal ? 1 : 0);
 249         u8 buf[2];
 250         int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
 251
 252         netdev_dbg(dev->net, "asix_get_phy_addr()\n");
 253
 254         if (ret < 0) {
 255                 netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
 256                 goto out;
 257         }
 258         netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
 259                    *((__le16 *)buf));
 260         ret = buf[offset];
 261
 262 out:
 263         return ret;
 264 }
 265
 266 int asix_get_phy_addr(struct usbnet *dev)
 267 {
 268         /* return the address of the internal phy */
 269         return asix_read_phy_addr(dev, 1);
 270 }
 271
 272
 273 int asix_sw_reset(struct usbnet *dev, u8 flags)
 274 {
 275         int ret;
 276
 277         ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL);
 278         if (ret < 0)
 279                 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);
 280
 281         return ret;
 282 }
 283
 284 u16 asix_read_rx_ctl(struct usbnet *dev)
 285 {
 286         __le16 v;
 287         int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v);
 288
 289         if (ret < 0) {
 290                 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
 291                 goto out;
 292         }
 293         ret = le16_to_cpu(v);
 294 out:
 295         return ret;
 296 }
 297
 298 int asix_write_rx_ctl(struct usbnet *dev, u16 mode)
 299 {
 300         int ret;
 301
 302         netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
 303         ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
 304         if (ret < 0)
 305                 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
 306                            mode, ret);
 307
 308         return ret;
 309 }
 310
 311 u16 asix_read_medium_status(struct usbnet *dev)
 312 {
 313         __le16 v;
 314         int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
 315
 316         if (ret < 0) {
 317                 netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
 318                            ret);
 319                 return ret;     /* TODO: callers not checking for error ret */
 320         }
 321
 322         return le16_to_cpu(v);
 323
 324 }
 325
 326 int asix_write_medium_mode(struct usbnet *dev, u16 mode)
 327 {
 328         int ret;
 329
 330         netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
 331         ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
 332         if (ret < 0)
 333                 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
 334                            mode, ret);
 335
 336         return ret;
 337 }
 338
 339 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep)
 340 {
 341         int ret;
 342
 343         netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
 344         ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL);
 345         if (ret < 0)
 346                 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
 347                            value, ret);
 348
 349         if (sleep)
 350                 msleep(sleep);
 351
 352         return ret;
 353 }
 354
 355 /*
 356  * AX88772 & AX88178 have a 16-bit RX_CTL value
 357  */
 358 void asix_set_multicast(struct net_device *net)
 359 {
 360         struct usbnet *dev = netdev_priv(net);
 361         struct asix_data *data = (struct asix_data *)&dev->data;
 362         u16 rx_ctl = AX_DEFAULT_RX_CTL;
 363
 364         if (net->flags & IFF_PROMISC) {
 365                 rx_ctl |= AX_RX_CTL_PRO;
 366         } else if (net->flags & IFF_ALLMULTI ||
 367                    netdev_mc_count(net) > AX_MAX_MCAST) {
 368                 rx_ctl |= AX_RX_CTL_AMALL;
 369         } else if (netdev_mc_empty(net)) {
 370                 /* just broadcast and directed */
 371         } else {
 372                 /* We use the 20 byte dev->data
 373                  * for our 8 byte filter buffer
 374                  * to avoid allocating memory that
 375                  * is tricky to free later */
 376                 struct netdev_hw_addr *ha;
 377                 u32 crc_bits;
 378
 379                 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
 380
 381                 /* Build the multicast hash filter. */
 382                 netdev_for_each_mc_addr(ha, net) {
 383                         crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
 384                         data->multi_filter[crc_bits >> 3] |=
 385                             1 << (crc_bits & 7);
 386                 }
 387
 388                 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
 389                                    AX_MCAST_FILTER_SIZE, data->multi_filter);
 390
 391                 rx_ctl |= AX_RX_CTL_AM;
 392         }
 393
 394         asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
 395 }
 396
 397 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
 398 {
 399         struct usbnet *dev = netdev_priv(netdev);
 400         __le16 res;
 401
 402         mutex_lock(&dev->phy_mutex);
 403         asix_set_sw_mii(dev);
 404         asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
 405                                 (__u16)loc, 2, &res);
 406         asix_set_hw_mii(dev);
 407         mutex_unlock(&dev->phy_mutex);
 408
 409         netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
 410                    phy_id, loc, le16_to_cpu(res));
 411
 412         return le16_to_cpu(res);
 413 }
 414
 415 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
 416 {
 417         struct usbnet *dev = netdev_priv(netdev);
 418         __le16 res = cpu_to_le16(val);
 419
 420         netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
 421                    phy_id, loc, val);
 422         mutex_lock(&dev->phy_mutex);
 423         asix_set_sw_mii(dev);
 424         asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
 425         asix_set_hw_mii(dev);
 426         mutex_unlock(&dev->phy_mutex);
 427 }
 428
 429 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 430 {
 431         struct usbnet *dev = netdev_priv(net);
 432         u8 opt;
 433
 434         if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
 435                 wolinfo->supported = 0;
 436                 wolinfo->wolopts = 0;
 437                 return;
 438         }
 439         wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
 440         wolinfo->wolopts = 0;
 441         if (opt & AX_MONITOR_LINK)
 442                 wolinfo->wolopts |= WAKE_PHY;
 443         if (opt & AX_MONITOR_MAGIC)
 444                 wolinfo->wolopts |= WAKE_MAGIC;
 445 }
 446
 447 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 448 {
 449         struct usbnet *dev = netdev_priv(net);
 450         u8 opt = 0;
 451
 452         if (wolinfo->wolopts & WAKE_PHY)
 453                 opt |= AX_MONITOR_LINK;
 454         if (wolinfo->wolopts & WAKE_MAGIC)
 455                 opt |= AX_MONITOR_MAGIC;
 456
 457         if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
 458                               opt, 0, 0, NULL) < 0)
 459                 return -EINVAL;
 460
 461         return 0;
 462 }
 463
 464 int asix_get_eeprom_len(struct net_device *net)
 465 {
 466         return AX_EEPROM_LEN;
 467 }
 468
 469 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
 470                     u8 *data)
 471 {
 472         struct usbnet *dev = netdev_priv(net);
 473         u16 *eeprom_buff;
 474         int first_word, last_word;
 475         int i;
 476
 477         if (eeprom->len == 0)
 478                 return -EINVAL;
 479
 480         eeprom->magic = AX_EEPROM_MAGIC;
 481
 482         first_word = eeprom->offset >> 1;
 483         last_word = (eeprom->offset + eeprom->len - 1) >> 1;
 484
 485         eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
 486                               GFP_KERNEL);
 487         if (!eeprom_buff)
 488                 return -ENOMEM;
 489
 490         /* ax8817x returns 2 bytes from eeprom on read */
 491         for (i = first_word; i <= last_word; i++) {
 492                 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
 493                                   &(eeprom_buff[i - first_word])) < 0) {
 494                         kfree(eeprom_buff);
 495                         return -EIO;
 496                 }
 497         }
 498
 499         memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
 500         kfree(eeprom_buff);
 501         return 0;
 502 }
 503
 504 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
 505                     u8 *data)
 506 {
 507         struct usbnet *dev = netdev_priv(net);
 508         u16 *eeprom_buff;
 509         int first_word, last_word;
 510         int i;
 511         int ret;
 512
 513         netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
 514                    eeprom->len, eeprom->offset, eeprom->magic);
 515
 516         if (eeprom->len == 0)
 517                 return -EINVAL;
 518
 519         if (eeprom->magic != AX_EEPROM_MAGIC)
 520                 return -EINVAL;
 521
 522         first_word = eeprom->offset >> 1;
 523         last_word = (eeprom->offset + eeprom->len - 1) >> 1;
 524
 525         eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
 526                               GFP_KERNEL);
 527         if (!eeprom_buff)
 528                 return -ENOMEM;
 529
 530         /* align data to 16 bit boundaries, read the missing data from
 531            the EEPROM */
 532         if (eeprom->offset & 1) {
 533                 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
 534                                     &(eeprom_buff[0]));
 535                 if (ret < 0) {
 536                         netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
 537                         goto free;
 538                 }
 539         }
 540
 541         if ((eeprom->offset + eeprom->len) & 1) {
 542                 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
 543                                     &(eeprom_buff[last_word - first_word]));
 544                 if (ret < 0) {
 545                         netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
 546                         goto free;
 547                 }
 548         }
 549
 550         memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);
 551
 552         /* write data to EEPROM */
 553         ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL);
 554         if (ret < 0) {
 555                 netdev_err(net, "Failed to enable EEPROM write\n");
 556                 goto free;
 557         }
 558         msleep(20);
 559
 560         for (i = first_word; i <= last_word; i++) {
 561                 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
 562                            i, eeprom_buff[i - first_word]);
 563                 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
 564                                      eeprom_buff[i - first_word], 0, NULL);
 565                 if (ret < 0) {
 566                         netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
 567                                    i);
 568                         goto free;
 569                 }
 570                 msleep(20);
 571         }
 572
 573         ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL);
 574         if (ret < 0) {
 575                 netdev_err(net, "Failed to disable EEPROM write\n");
 576                 goto free;
 577         }
 578
 579         ret = 0;
 580 free:
 581         kfree(eeprom_buff);
 582         return ret;
 583 }
 584
 585 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 586 {
 587         /* Inherit standard device info */
 588         usbnet_get_drvinfo(net, info);
 589         strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
 590         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 591 }
 592
 593 int asix_set_mac_address(struct net_device *net, void *p)
 594 {
 595         struct usbnet *dev = netdev_priv(net);
 596         struct asix_data *data = (struct asix_data *)&dev->data;
 597         struct sockaddr *addr = p;
 598
 599         if (netif_running(net))
 600                 return -EBUSY;
 601         if (!is_valid_ether_addr(addr->sa_data))
 602                 return -EADDRNOTAVAIL;
 603
 604         memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
 605
 606         /* We use the 20 byte dev->data
 607          * for our 6 byte mac buffer
 608          * to avoid allocating memory that
 609          * is tricky to free later */
 610         memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
 611         asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
 612                                                         data->mac_addr);
 613
 614         return 0;
 615 }