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, 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
  25 int 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
  54 out:
  55         return err;
  56 }
  57
  58 int 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
  85 out:
  86         return err;
  87 }
  88
  89 static 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
 102 void 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
 145 int 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
 188 struct 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
 243 int 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
 252 int 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
 261 int 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
 277 out:
 278         return ret;
 279 }
 280
 281 int 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
 288 int 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
 299 u16 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);
 309 out:
 310         return ret;
 311 }
 312
 313 int 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
 326 u16 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
 341 int 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
 354 int 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  */
 373 void 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
 412 int 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
 430 void 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
 444 void 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
 462 int 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
 479 int asix_get_eeprom_len(struct net_device *net)
 480 {
 481         return AX_EEPROM_LEN;
 482 }
 483
 484 int 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
 519 int 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;
 595 free:
 596         kfree(eeprom_buff);
 597         return ret;
 598 }
 599
 600 void 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
 609 int 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 }