drivers/net/usb/asix_common.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * ASIX AX8817X based USB 2.0 Ethernet Devices
   4  * Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
   5  * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
   6  * Copyright (C) 2006 James Painter <jamie.painter@iname.com>
   7  * Copyright (c) 2002-2003 TiVo Inc.
   8  */
   9
  10 #include "asix.h"
  11
  12 int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  13                   u16 size, void *data, int in_pm)
  14 {
  15         int ret;
  16         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  17
  18         BUG_ON(!dev);
  19
  20         if (!in_pm)
  21                 fn = usbnet_read_cmd;
  22         else
  23                 fn = usbnet_read_cmd_nopm;
  24
  25         ret = fn(dev, cmd, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  26                  value, index, data, size);
  27
  28         if (unlikely(ret < 0))
  29                 netdev_warn(dev->net, "Failed to read reg index 0x%04x: %d\n",
  30                             index, ret);
  31
  32         return ret;
  33 }
  34
  35 int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  36                    u16 size, void *data, int in_pm)
  37 {
  38         int ret;
  39         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
  40
  41         BUG_ON(!dev);
  42
  43         if (!in_pm)
  44                 fn = usbnet_write_cmd;
  45         else
  46                 fn = usbnet_write_cmd_nopm;
  47
  48         ret = fn(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  49                  value, index, data, size);
  50
  51         if (unlikely(ret < 0))
  52                 netdev_warn(dev->net, "Failed to write reg index 0x%04x: %d\n",
  53                             index, ret);
  54
  55         return ret;
  56 }
  57
  58 void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
  59                           u16 size, void *data)
  60 {
  61         usbnet_write_cmd_async(dev, cmd,
  62                                USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  63                                value, index, data, size);
  64 }
  65
  66 static void reset_asix_rx_fixup_info(struct asix_rx_fixup_info *rx)
  67 {
  68         /* Reset the variables that have a lifetime outside of
  69          * asix_rx_fixup_internal() so that future processing starts from a
  70          * known set of initial conditions.
  71          */
  72
  73         if (rx->ax_skb) {
  74                 /* Discard any incomplete Ethernet frame in the netdev buffer */
  75                 kfree_skb(rx->ax_skb);
  76                 rx->ax_skb = NULL;
  77         }
  78
  79         /* Assume the Data header 32-bit word is at the start of the current
  80          * or next URB socket buffer so reset all the state variables.
  81          */
  82         rx->remaining = 0;
  83         rx->split_head = false;
  84         rx->header = 0;
  85 }
  86
  87 int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb,
  88                            struct asix_rx_fixup_info *rx)
  89 {
  90         int offset = 0;
  91         u16 size;
  92
  93         /* When an Ethernet frame spans multiple URB socket buffers,
  94          * do a sanity test for the Data header synchronisation.
  95          * Attempt to detect the situation of the previous socket buffer having
  96          * been truncated or a socket buffer was missing. These situations
  97          * cause a discontinuity in the data stream and therefore need to avoid
  98          * appending bad data to the end of the current netdev socket buffer.
  99          * Also avoid unnecessarily discarding a good current netdev socket
 100          * buffer.
 101          */
 102         if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) {
 103                 offset = ((rx->remaining + 1) & 0xfffe);
 104                 rx->header = get_unaligned_le32(skb->data + offset);
 105                 offset = 0;
 106
 107                 size = (u16)(rx->header & 0x7ff);
 108                 if (size != ((~rx->header >> 16) & 0x7ff)) {
 109                         netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n",
 110                                    rx->remaining);
 111                         reset_asix_rx_fixup_info(rx);
 112                 }
 113         }
 114
 115         while (offset + sizeof(u16) <= skb->len) {
 116                 u16 copy_length;
 117
 118                 if (!rx->remaining) {
 119                         if (skb->len - offset == sizeof(u16)) {
 120                                 rx->header = get_unaligned_le16(
 121                                                 skb->data + offset);
 122                                 rx->split_head = true;
 123                                 offset += sizeof(u16);
 124                                 break;
 125                         }
 126
 127                         if (rx->split_head == true) {
 128                                 rx->header |= (get_unaligned_le16(
 129                                                 skb->data + offset) << 16);
 130                                 rx->split_head = false;
 131                                 offset += sizeof(u16);
 132                         } else {
 133                                 rx->header = get_unaligned_le32(skb->data +
 134                                                                 offset);
 135                                 offset += sizeof(u32);
 136                         }
 137
 138                         /* take frame length from Data header 32-bit word */
 139                         size = (u16)(rx->header & 0x7ff);
 140                         if (size != ((~rx->header >> 16) & 0x7ff)) {
 141                                 netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
 142                                            rx->header, offset);
 143                                 reset_asix_rx_fixup_info(rx);
 144                                 return 0;
 145                         }
 146                         if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
 147                                 netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
 148                                            size);
 149                                 reset_asix_rx_fixup_info(rx);
 150                                 return 0;
 151                         }
 152
 153                         /* Sometimes may fail to get a netdev socket buffer but
 154                          * continue to process the URB socket buffer so that
 155                          * synchronisation of the Ethernet frame Data header
 156                          * word is maintained.
 157                          */
 158                         rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
 159
 160                         rx->remaining = size;
 161                 }
 162
 163                 if (rx->remaining > skb->len - offset) {
 164                         copy_length = skb->len - offset;
 165                         rx->remaining -= copy_length;
 166                 } else {
 167                         copy_length = rx->remaining;
 168                         rx->remaining = 0;
 169                 }
 170
 171                 if (rx->ax_skb) {
 172                         skb_put_data(rx->ax_skb, skb->data + offset,
 173                                      copy_length);
 174                         if (!rx->remaining) {
 175                                 usbnet_skb_return(dev, rx->ax_skb);
 176                                 rx->ax_skb = NULL;
 177                         }
 178                 }
 179
 180                 offset += (copy_length + 1) & 0xfffe;
 181         }
 182
 183         if (skb->len != offset) {
 184                 netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n",
 185                            skb->len, offset);
 186                 reset_asix_rx_fixup_info(rx);
 187                 return 0;
 188         }
 189
 190         return 1;
 191 }
 192
 193 int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb)
 194 {
 195         struct asix_common_private *dp = dev->driver_priv;
 196         struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
 197
 198         return asix_rx_fixup_internal(dev, skb, rx);
 199 }
 200
 201 void asix_rx_fixup_common_free(struct asix_common_private *dp)
 202 {
 203         struct asix_rx_fixup_info *rx;
 204
 205         if (!dp)
 206                 return;
 207
 208         rx = &dp->rx_fixup_info;
 209
 210         if (rx->ax_skb) {
 211                 kfree_skb(rx->ax_skb);
 212                 rx->ax_skb = NULL;
 213         }
 214 }
 215
 216 struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 217                               gfp_t flags)
 218 {
 219         int padlen;
 220         int headroom = skb_headroom(skb);
 221         int tailroom = skb_tailroom(skb);
 222         u32 packet_len;
 223         u32 padbytes = 0xffff0000;
 224         void *ptr;
 225
 226         padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4;
 227
 228         /* We need to push 4 bytes in front of frame (packet_len)
 229          * and maybe add 4 bytes after the end (if padlen is 4)
 230          *
 231          * Avoid skb_copy_expand() expensive call, using following rules :
 232          * - We are allowed to push 4 bytes in headroom if skb_header_cloned()
 233          *   is false (and if we have 4 bytes of headroom)
 234          * - We are allowed to put 4 bytes at tail if skb_cloned()
 235          *   is false (and if we have 4 bytes of tailroom)
 236          *
 237          * TCP packets for example are cloned, but __skb_header_release()
 238          * was called in tcp stack, allowing us to use headroom for our needs.
 239          */
 240         if (!skb_header_cloned(skb) &&
 241             !(padlen && skb_cloned(skb)) &&
 242             headroom + tailroom >= 4 + padlen) {
 243                 /* following should not happen, but better be safe */
 244                 if (headroom < 4 ||
 245                     tailroom < padlen) {
 246                         skb->data = memmove(skb->head + 4, skb->data, skb->len);
 247                         skb_set_tail_pointer(skb, skb->len);
 248                 }
 249         } else {
 250                 struct sk_buff *skb2;
 251
 252                 skb2 = skb_copy_expand(skb, 4, padlen, flags);
 253                 dev_kfree_skb_any(skb);
 254                 skb = skb2;
 255                 if (!skb)
 256                         return NULL;
 257         }
 258
 259         packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
 260         ptr = skb_push(skb, 4);
 261         put_unaligned_le32(packet_len, ptr);
 262
 263         if (padlen) {
 264                 put_unaligned_le32(padbytes, skb_tail_pointer(skb));
 265                 skb_put(skb, sizeof(padbytes));
 266         }
 267
 268         usbnet_set_skb_tx_stats(skb, 1, 0);
 269         return skb;
 270 }
 271
 272 int asix_set_sw_mii(struct usbnet *dev, int in_pm)
 273 {
 274         int ret;
 275         ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL, in_pm);
 276
 277         if (ret < 0)
 278                 netdev_err(dev->net, "Failed to enable software MII access\n");
 279         return ret;
 280 }
 281
 282 int asix_set_hw_mii(struct usbnet *dev, int in_pm)
 283 {
 284         int ret;
 285         ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL, in_pm);
 286         if (ret < 0)
 287                 netdev_err(dev->net, "Failed to enable hardware MII access\n");
 288         return ret;
 289 }
 290
 291 int asix_read_phy_addr(struct usbnet *dev, int internal)
 292 {
 293         int offset = (internal ? 1 : 0);
 294         u8 buf[2];
 295         int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf, 0);
 296
 297         netdev_dbg(dev->net, "asix_get_phy_addr()\n");
 298
 299         if (ret < 0) {
 300                 netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
 301                 goto out;
 302         }
 303         netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
 304                    *((__le16 *)buf));
 305         ret = buf[offset];
 306
 307 out:
 308         return ret;
 309 }
 310
 311 int asix_get_phy_addr(struct usbnet *dev)
 312 {
 313         /* return the address of the internal phy */
 314         return asix_read_phy_addr(dev, 1);
 315 }
 316
 317
 318 int asix_sw_reset(struct usbnet *dev, u8 flags, int in_pm)
 319 {
 320         int ret;
 321
 322         ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL, in_pm);
 323         if (ret < 0)
 324                 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);
 325
 326         return ret;
 327 }
 328
 329 u16 asix_read_rx_ctl(struct usbnet *dev, int in_pm)
 330 {
 331         __le16 v;
 332         int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v, in_pm);
 333
 334         if (ret < 0) {
 335                 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
 336                 goto out;
 337         }
 338         ret = le16_to_cpu(v);
 339 out:
 340         return ret;
 341 }
 342
 343 int asix_write_rx_ctl(struct usbnet *dev, u16 mode, int in_pm)
 344 {
 345         int ret;
 346
 347         netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
 348         ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL, in_pm);
 349         if (ret < 0)
 350                 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
 351                            mode, ret);
 352
 353         return ret;
 354 }
 355
 356 u16 asix_read_medium_status(struct usbnet *dev, int in_pm)
 357 {
 358         __le16 v;
 359         int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS,
 360                                 0, 0, 2, &v, in_pm);
 361
 362         if (ret < 0) {
 363                 netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
 364                            ret);
 365                 return ret;     /* TODO: callers not checking for error ret */
 366         }
 367
 368         return le16_to_cpu(v);
 369
 370 }
 371
 372 int asix_write_medium_mode(struct usbnet *dev, u16 mode, int in_pm)
 373 {
 374         int ret;
 375
 376         netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
 377         ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE,
 378                              mode, 0, 0, NULL, in_pm);
 379         if (ret < 0)
 380                 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
 381                            mode, ret);
 382
 383         return ret;
 384 }
 385
 386 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm)
 387 {
 388         int ret;
 389
 390         netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
 391         ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL, in_pm);
 392         if (ret < 0)
 393                 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
 394                            value, ret);
 395
 396         if (sleep)
 397                 msleep(sleep);
 398
 399         return ret;
 400 }
 401
 402 /*
 403  * AX88772 & AX88178 have a 16-bit RX_CTL value
 404  */
 405 void asix_set_multicast(struct net_device *net)
 406 {
 407         struct usbnet *dev = netdev_priv(net);
 408         struct asix_data *data = (struct asix_data *)&dev->data;
 409         u16 rx_ctl = AX_DEFAULT_RX_CTL;
 410
 411         if (net->flags & IFF_PROMISC) {
 412                 rx_ctl |= AX_RX_CTL_PRO;
 413         } else if (net->flags & IFF_ALLMULTI ||
 414                    netdev_mc_count(net) > AX_MAX_MCAST) {
 415                 rx_ctl |= AX_RX_CTL_AMALL;
 416         } else if (netdev_mc_empty(net)) {
 417                 /* just broadcast and directed */
 418         } else {
 419                 /* We use the 20 byte dev->data
 420                  * for our 8 byte filter buffer
 421                  * to avoid allocating memory that
 422                  * is tricky to free later */
 423                 struct netdev_hw_addr *ha;
 424                 u32 crc_bits;
 425
 426                 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
 427
 428                 /* Build the multicast hash filter. */
 429                 netdev_for_each_mc_addr(ha, net) {
 430                         crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
 431                         data->multi_filter[crc_bits >> 3] |=
 432                             1 << (crc_bits & 7);
 433                 }
 434
 435                 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
 436                                    AX_MCAST_FILTER_SIZE, data->multi_filter);
 437
 438                 rx_ctl |= AX_RX_CTL_AM;
 439         }
 440
 441         asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
 442 }
 443
 444 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
 445 {
 446         struct usbnet *dev = netdev_priv(netdev);
 447         __le16 res;
 448         u8 smsr;
 449         int i = 0;
 450         int ret;
 451
 452         mutex_lock(&dev->phy_mutex);
 453         do {
 454                 ret = asix_set_sw_mii(dev, 0);
 455                 if (ret == -ENODEV || ret == -ETIMEDOUT)
 456                         break;
 457                 usleep_range(1000, 1100);
 458                 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
 459                                     0, 0, 1, &smsr, 0);
 460         } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV));
 461         if (ret == -ENODEV || ret == -ETIMEDOUT) {
 462                 mutex_unlock(&dev->phy_mutex);
 463                 return ret;
 464         }
 465
 466         asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
 467                                 (__u16)loc, 2, &res, 0);
 468         asix_set_hw_mii(dev, 0);
 469         mutex_unlock(&dev->phy_mutex);
 470
 471         netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
 472                         phy_id, loc, le16_to_cpu(res));
 473
 474         return le16_to_cpu(res);
 475 }
 476
 477 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
 478 {
 479         struct usbnet *dev = netdev_priv(netdev);
 480         __le16 res = cpu_to_le16(val);
 481         u8 smsr;
 482         int i = 0;
 483         int ret;
 484
 485         netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
 486                         phy_id, loc, val);
 487
 488         mutex_lock(&dev->phy_mutex);
 489         do {
 490                 ret = asix_set_sw_mii(dev, 0);
 491                 if (ret == -ENODEV)
 492                         break;
 493                 usleep_range(1000, 1100);
 494                 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
 495                                     0, 0, 1, &smsr, 0);
 496         } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV));
 497         if (ret == -ENODEV) {
 498                 mutex_unlock(&dev->phy_mutex);
 499                 return;
 500         }
 501
 502         asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id,
 503                        (__u16)loc, 2, &res, 0);
 504         asix_set_hw_mii(dev, 0);
 505         mutex_unlock(&dev->phy_mutex);
 506 }
 507
 508 int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc)
 509 {
 510         struct usbnet *dev = netdev_priv(netdev);
 511         __le16 res;
 512         u8 smsr;
 513         int i = 0;
 514         int ret;
 515
 516         mutex_lock(&dev->phy_mutex);
 517         do {
 518                 ret = asix_set_sw_mii(dev, 1);
 519                 if (ret == -ENODEV || ret == -ETIMEDOUT)
 520                         break;
 521                 usleep_range(1000, 1100);
 522                 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
 523                                     0, 0, 1, &smsr, 1);
 524         } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV));
 525         if (ret == -ENODEV || ret == -ETIMEDOUT) {
 526                 mutex_unlock(&dev->phy_mutex);
 527                 return ret;
 528         }
 529
 530         asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
 531                       (__u16)loc, 2, &res, 1);
 532         asix_set_hw_mii(dev, 1);
 533         mutex_unlock(&dev->phy_mutex);
 534
 535         netdev_dbg(dev->net, "asix_mdio_read_nopm() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
 536                         phy_id, loc, le16_to_cpu(res));
 537
 538         return le16_to_cpu(res);
 539 }
 540
 541 void
 542 asix_mdio_write_nopm(struct net_device *netdev, int phy_id, int loc, int val)
 543 {
 544         struct usbnet *dev = netdev_priv(netdev);
 545         __le16 res = cpu_to_le16(val);
 546         u8 smsr;
 547         int i = 0;
 548         int ret;
 549
 550         netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
 551                         phy_id, loc, val);
 552
 553         mutex_lock(&dev->phy_mutex);
 554         do {
 555                 ret = asix_set_sw_mii(dev, 1);
 556                 if (ret == -ENODEV)
 557                         break;
 558                 usleep_range(1000, 1100);
 559                 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
 560                                     0, 0, 1, &smsr, 1);
 561         } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV));
 562         if (ret == -ENODEV) {
 563                 mutex_unlock(&dev->phy_mutex);
 564                 return;
 565         }
 566
 567         asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id,
 568                        (__u16)loc, 2, &res, 1);
 569         asix_set_hw_mii(dev, 1);
 570         mutex_unlock(&dev->phy_mutex);
 571 }
 572
 573 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 574 {
 575         struct usbnet *dev = netdev_priv(net);
 576         u8 opt;
 577
 578         if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE,
 579                           0, 0, 1, &opt, 0) < 0) {
 580                 wolinfo->supported = 0;
 581                 wolinfo->wolopts = 0;
 582                 return;
 583         }
 584         wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
 585         wolinfo->wolopts = 0;
 586         if (opt & AX_MONITOR_LINK)
 587                 wolinfo->wolopts |= WAKE_PHY;
 588         if (opt & AX_MONITOR_MAGIC)
 589                 wolinfo->wolopts |= WAKE_MAGIC;
 590 }
 591
 592 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
 593 {
 594         struct usbnet *dev = netdev_priv(net);
 595         u8 opt = 0;
 596
 597         if (wolinfo->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
 598                 return -EINVAL;
 599
 600         if (wolinfo->wolopts & WAKE_PHY)
 601                 opt |= AX_MONITOR_LINK;
 602         if (wolinfo->wolopts & WAKE_MAGIC)
 603                 opt |= AX_MONITOR_MAGIC;
 604
 605         if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
 606                               opt, 0, 0, NULL, 0) < 0)
 607                 return -EINVAL;
 608
 609         return 0;
 610 }
 611
 612 int asix_get_eeprom_len(struct net_device *net)
 613 {
 614         return AX_EEPROM_LEN;
 615 }
 616
 617 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
 618                     u8 *data)
 619 {
 620         struct usbnet *dev = netdev_priv(net);
 621         u16 *eeprom_buff;
 622         int first_word, last_word;
 623         int i;
 624
 625         if (eeprom->len == 0)
 626                 return -EINVAL;
 627
 628         eeprom->magic = AX_EEPROM_MAGIC;
 629
 630         first_word = eeprom->offset >> 1;
 631         last_word = (eeprom->offset + eeprom->len - 1) >> 1;
 632
 633         eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16),
 634                                     GFP_KERNEL);
 635         if (!eeprom_buff)
 636                 return -ENOMEM;
 637
 638         /* ax8817x returns 2 bytes from eeprom on read */
 639         for (i = first_word; i <= last_word; i++) {
 640                 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
 641                                   &eeprom_buff[i - first_word], 0) < 0) {
 642                         kfree(eeprom_buff);
 643                         return -EIO;
 644                 }
 645         }
 646
 647         memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
 648         kfree(eeprom_buff);
 649         return 0;
 650 }
 651
 652 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
 653                     u8 *data)
 654 {
 655         struct usbnet *dev = netdev_priv(net);
 656         u16 *eeprom_buff;
 657         int first_word, last_word;
 658         int i;
 659         int ret;
 660
 661         netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
 662                    eeprom->len, eeprom->offset, eeprom->magic);
 663
 664         if (eeprom->len == 0)
 665                 return -EINVAL;
 666
 667         if (eeprom->magic != AX_EEPROM_MAGIC)
 668                 return -EINVAL;
 669
 670         first_word = eeprom->offset >> 1;
 671         last_word = (eeprom->offset + eeprom->len - 1) >> 1;
 672
 673         eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16),
 674                                     GFP_KERNEL);
 675         if (!eeprom_buff)
 676                 return -ENOMEM;
 677
 678         /* align data to 16 bit boundaries, read the missing data from
 679            the EEPROM */
 680         if (eeprom->offset & 1) {
 681                 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
 682                                     &eeprom_buff[0], 0);
 683                 if (ret < 0) {
 684                         netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
 685                         goto free;
 686                 }
 687         }
 688
 689         if ((eeprom->offset + eeprom->len) & 1) {
 690                 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
 691                                     &eeprom_buff[last_word - first_word], 0);
 692                 if (ret < 0) {
 693                         netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
 694                         goto free;
 695                 }
 696         }
 697
 698         memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);
 699
 700         /* write data to EEPROM */
 701         ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL, 0);
 702         if (ret < 0) {
 703                 netdev_err(net, "Failed to enable EEPROM write\n");
 704                 goto free;
 705         }
 706         msleep(20);
 707
 708         for (i = first_word; i <= last_word; i++) {
 709                 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
 710                            i, eeprom_buff[i - first_word]);
 711                 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
 712                                      eeprom_buff[i - first_word], 0, NULL, 0);
 713                 if (ret < 0) {
 714                         netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
 715                                    i);
 716                         goto free;
 717                 }
 718                 msleep(20);
 719         }
 720
 721         ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL, 0);
 722         if (ret < 0) {
 723                 netdev_err(net, "Failed to disable EEPROM write\n");
 724                 goto free;
 725         }
 726
 727         ret = 0;
 728 free:
 729         kfree(eeprom_buff);
 730         return ret;
 731 }
 732
 733 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 734 {
 735         /* Inherit standard device info */
 736         usbnet_get_drvinfo(net, info);
 737         strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
 738         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 739 }
 740
 741 int asix_set_mac_address(struct net_device *net, void *p)
 742 {
 743         struct usbnet *dev = netdev_priv(net);
 744         struct asix_data *data = (struct asix_data *)&dev->data;
 745         struct sockaddr *addr = p;
 746
 747         if (netif_running(net))
 748                 return -EBUSY;
 749         if (!is_valid_ether_addr(addr->sa_data))
 750                 return -EADDRNOTAVAIL;
 751
 752         memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
 753
 754         /* We use the 20 byte dev->data
 755          * for our 6 byte mac buffer
 756          * to avoid allocating memory that
 757          * is tricky to free later */
 758         memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
 759         asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
 760                                                         data->mac_addr);
 761
 762         return 0;
 763 }