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 #define AX_HOST_EN_RETRIES 30 13 14 int __must_check asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, 15 u16 size, void *data, int in_pm) 16 { 17 int ret; 18 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 19 20 BUG_ON(!dev); 21 22 if (!in_pm) 23 fn = usbnet_read_cmd; 24 else 25 fn = usbnet_read_cmd_nopm; 26 27 ret = fn(dev, cmd, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 28 value, index, data, size); 29 30 if (unlikely(ret < size)) { 31 ret = ret < 0 ? ret : -ENODATA; 32 33 netdev_warn(dev->net, "Failed to read reg index 0x%04x: %d\n", 34 index, ret); 35 } 36 37 return ret; 38 } 39 40 int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, 41 u16 size, void *data, int in_pm) 42 { 43 int ret; 44 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 45 46 BUG_ON(!dev); 47 48 if (!in_pm) 49 fn = usbnet_write_cmd; 50 else 51 fn = usbnet_write_cmd_nopm; 52 53 ret = fn(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 54 value, index, data, size); 55 56 if (unlikely(ret < 0)) 57 netdev_warn(dev->net, "Failed to write reg index 0x%04x: %d\n", 58 index, ret); 59 60 return ret; 61 } 62 63 void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index, 64 u16 size, void *data) 65 { 66 usbnet_write_cmd_async(dev, cmd, 67 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 68 value, index, data, size); 69 } 70 71 static int asix_set_sw_mii(struct usbnet *dev, int in_pm) 72 { 73 int ret; 74 75 ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL, in_pm); 76 77 if (ret < 0) 78 netdev_err(dev->net, "Failed to enable software MII access\n"); 79 return ret; 80 } 81 82 static int asix_set_hw_mii(struct usbnet *dev, int in_pm) 83 { 84 int ret; 85 86 ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL, in_pm); 87 if (ret < 0) 88 netdev_err(dev->net, "Failed to enable hardware MII access\n"); 89 return ret; 90 } 91 92 static int asix_check_host_enable(struct usbnet *dev, int in_pm) 93 { 94 int i, ret; 95 u8 smsr; 96 97 for (i = 0; i < AX_HOST_EN_RETRIES; ++i) { 98 ret = asix_set_sw_mii(dev, in_pm); 99 if (ret == -ENODEV || ret == -ETIMEDOUT) 100 break; 101 usleep_range(1000, 1100); 102 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 103 0, 0, 1, &smsr, in_pm); 104 if (ret == -ENODEV) 105 break; 106 else if (ret < 0) 107 continue; 108 else if (smsr & AX_HOST_EN) 109 break; 110 } 111 112 return i >= AX_HOST_EN_RETRIES ? -ETIMEDOUT : ret; 113 } 114 115 static void reset_asix_rx_fixup_info(struct asix_rx_fixup_info *rx) 116 { 117 /* Reset the variables that have a lifetime outside of 118 * asix_rx_fixup_internal() so that future processing starts from a 119 * known set of initial conditions. 120 */ 121 122 if (rx->ax_skb) { 123 /* Discard any incomplete Ethernet frame in the netdev buffer */ 124 kfree_skb(rx->ax_skb); 125 rx->ax_skb = NULL; 126 } 127 128 /* Assume the Data header 32-bit word is at the start of the current 129 * or next URB socket buffer so reset all the state variables. 130 */ 131 rx->remaining = 0; 132 rx->split_head = false; 133 rx->header = 0; 134 } 135 136 int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb, 137 struct asix_rx_fixup_info *rx) 138 { 139 int offset = 0; 140 u16 size; 141 142 /* When an Ethernet frame spans multiple URB socket buffers, 143 * do a sanity test for the Data header synchronisation. 144 * Attempt to detect the situation of the previous socket buffer having 145 * been truncated or a socket buffer was missing. These situations 146 * cause a discontinuity in the data stream and therefore need to avoid 147 * appending bad data to the end of the current netdev socket buffer. 148 * Also avoid unnecessarily discarding a good current netdev socket 149 * buffer. 150 */ 151 if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) { 152 offset = ((rx->remaining + 1) & 0xfffe); 153 rx->header = get_unaligned_le32(skb->data + offset); 154 offset = 0; 155 156 size = (u16)(rx->header & 0x7ff); 157 if (size != ((~rx->header >> 16) & 0x7ff)) { 158 netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n", 159 rx->remaining); 160 reset_asix_rx_fixup_info(rx); 161 } 162 } 163 164 while (offset + sizeof(u16) <= skb->len) { 165 u16 copy_length; 166 167 if (!rx->remaining) { 168 if (skb->len - offset == sizeof(u16)) { 169 rx->header = get_unaligned_le16( 170 skb->data + offset); 171 rx->split_head = true; 172 offset += sizeof(u16); 173 break; 174 } 175 176 if (rx->split_head == true) { 177 rx->header |= (get_unaligned_le16( 178 skb->data + offset) << 16); 179 rx->split_head = false; 180 offset += sizeof(u16); 181 } else { 182 rx->header = get_unaligned_le32(skb->data + 183 offset); 184 offset += sizeof(u32); 185 } 186 187 /* take frame length from Data header 32-bit word */ 188 size = (u16)(rx->header & 0x7ff); 189 if (size != ((~rx->header >> 16) & 0x7ff)) { 190 netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n", 191 rx->header, offset); 192 reset_asix_rx_fixup_info(rx); 193 return 0; 194 } 195 if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) { 196 netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n", 197 size); 198 reset_asix_rx_fixup_info(rx); 199 return 0; 200 } 201 202 /* Sometimes may fail to get a netdev socket buffer but 203 * continue to process the URB socket buffer so that 204 * synchronisation of the Ethernet frame Data header 205 * word is maintained. 206 */ 207 rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size); 208 209 rx->remaining = size; 210 } 211 212 if (rx->remaining > skb->len - offset) { 213 copy_length = skb->len - offset; 214 rx->remaining -= copy_length; 215 } else { 216 copy_length = rx->remaining; 217 rx->remaining = 0; 218 } 219 220 if (rx->ax_skb) { 221 skb_put_data(rx->ax_skb, skb->data + offset, 222 copy_length); 223 if (!rx->remaining) { 224 usbnet_skb_return(dev, rx->ax_skb); 225 rx->ax_skb = NULL; 226 } 227 } 228 229 offset += (copy_length + 1) & 0xfffe; 230 } 231 232 if (skb->len != offset) { 233 netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n", 234 skb->len, offset); 235 reset_asix_rx_fixup_info(rx); 236 return 0; 237 } 238 239 return 1; 240 } 241 242 int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb) 243 { 244 struct asix_common_private *dp = dev->driver_priv; 245 struct asix_rx_fixup_info *rx = &dp->rx_fixup_info; 246 247 return asix_rx_fixup_internal(dev, skb, rx); 248 } 249 250 void asix_rx_fixup_common_free(struct asix_common_private *dp) 251 { 252 struct asix_rx_fixup_info *rx; 253 254 if (!dp) 255 return; 256 257 rx = &dp->rx_fixup_info; 258 259 if (rx->ax_skb) { 260 kfree_skb(rx->ax_skb); 261 rx->ax_skb = NULL; 262 } 263 } 264 265 struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb, 266 gfp_t flags) 267 { 268 int padlen; 269 int headroom = skb_headroom(skb); 270 int tailroom = skb_tailroom(skb); 271 u32 packet_len; 272 u32 padbytes = 0xffff0000; 273 void *ptr; 274 275 padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4; 276 277 /* We need to push 4 bytes in front of frame (packet_len) 278 * and maybe add 4 bytes after the end (if padlen is 4) 279 * 280 * Avoid skb_copy_expand() expensive call, using following rules : 281 * - We are allowed to push 4 bytes in headroom if skb_header_cloned() 282 * is false (and if we have 4 bytes of headroom) 283 * - We are allowed to put 4 bytes at tail if skb_cloned() 284 * is false (and if we have 4 bytes of tailroom) 285 * 286 * TCP packets for example are cloned, but __skb_header_release() 287 * was called in tcp stack, allowing us to use headroom for our needs. 288 */ 289 if (!skb_header_cloned(skb) && 290 !(padlen && skb_cloned(skb)) && 291 headroom + tailroom >= 4 + padlen) { 292 /* following should not happen, but better be safe */ 293 if (headroom < 4 || 294 tailroom < padlen) { 295 skb->data = memmove(skb->head + 4, skb->data, skb->len); 296 skb_set_tail_pointer(skb, skb->len); 297 } 298 } else { 299 struct sk_buff *skb2; 300 301 skb2 = skb_copy_expand(skb, 4, padlen, flags); 302 dev_kfree_skb_any(skb); 303 skb = skb2; 304 if (!skb) 305 return NULL; 306 } 307 308 packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len; 309 ptr = skb_push(skb, 4); 310 put_unaligned_le32(packet_len, ptr); 311 312 if (padlen) { 313 put_unaligned_le32(padbytes, skb_tail_pointer(skb)); 314 skb_put(skb, sizeof(padbytes)); 315 } 316 317 usbnet_set_skb_tx_stats(skb, 1, 0); 318 return skb; 319 } 320 321 int asix_read_phy_addr(struct usbnet *dev, bool internal) 322 { 323 int ret, offset; 324 u8 buf[2]; 325 326 ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf, 0); 327 if (ret < 0) 328 goto error; 329 330 if (ret < 2) { 331 ret = -EIO; 332 goto error; 333 } 334 335 offset = (internal ? 1 : 0); 336 ret = buf[offset]; 337 338 netdev_dbg(dev->net, "%s PHY address 0x%x\n", 339 internal ? "internal" : "external", ret); 340 341 return ret; 342 343 error: 344 netdev_err(dev->net, "Error reading PHY_ID register: %02x\n", ret); 345 346 return ret; 347 } 348 349 int asix_sw_reset(struct usbnet *dev, u8 flags, int in_pm) 350 { 351 int ret; 352 353 ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL, in_pm); 354 if (ret < 0) 355 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret); 356 357 return ret; 358 } 359 360 u16 asix_read_rx_ctl(struct usbnet *dev, int in_pm) 361 { 362 __le16 v; 363 int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v, in_pm); 364 365 if (ret < 0) { 366 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret); 367 goto out; 368 } 369 ret = le16_to_cpu(v); 370 out: 371 return ret; 372 } 373 374 int asix_write_rx_ctl(struct usbnet *dev, u16 mode, int in_pm) 375 { 376 int ret; 377 378 netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode); 379 ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL, in_pm); 380 if (ret < 0) 381 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n", 382 mode, ret); 383 384 return ret; 385 } 386 387 u16 asix_read_medium_status(struct usbnet *dev, int in_pm) 388 { 389 __le16 v; 390 int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 391 0, 0, 2, &v, in_pm); 392 393 if (ret < 0) { 394 netdev_err(dev->net, "Error reading Medium Status register: %02x\n", 395 ret); 396 return ret; /* TODO: callers not checking for error ret */ 397 } 398 399 return le16_to_cpu(v); 400 401 } 402 403 int asix_write_medium_mode(struct usbnet *dev, u16 mode, int in_pm) 404 { 405 int ret; 406 407 netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode); 408 ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, 409 mode, 0, 0, NULL, in_pm); 410 if (ret < 0) 411 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n", 412 mode, ret); 413 414 return ret; 415 } 416 417 /* set MAC link settings according to information from phylib */ 418 void asix_adjust_link(struct net_device *netdev) 419 { 420 struct phy_device *phydev = netdev->phydev; 421 struct usbnet *dev = netdev_priv(netdev); 422 u16 mode = 0; 423 424 if (phydev->link) { 425 mode = AX88772_MEDIUM_DEFAULT; 426 427 if (phydev->duplex == DUPLEX_HALF) 428 mode &= ~AX_MEDIUM_FD; 429 430 if (phydev->speed != SPEED_100) 431 mode &= ~AX_MEDIUM_PS; 432 } 433 434 asix_write_medium_mode(dev, mode, 0); 435 phy_print_status(phydev); 436 usbnet_link_change(dev, phydev->link, 0); 437 } 438 439 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm) 440 { 441 int ret; 442 443 netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value); 444 ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL, in_pm); 445 if (ret < 0) 446 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n", 447 value, ret); 448 449 if (sleep) 450 msleep(sleep); 451 452 return ret; 453 } 454 455 /* 456 * AX88772 & AX88178 have a 16-bit RX_CTL value 457 */ 458 void asix_set_multicast(struct net_device *net) 459 { 460 struct usbnet *dev = netdev_priv(net); 461 struct asix_data *data = (struct asix_data *)&dev->data; 462 u16 rx_ctl = AX_DEFAULT_RX_CTL; 463 464 if (net->flags & IFF_PROMISC) { 465 rx_ctl |= AX_RX_CTL_PRO; 466 } else if (net->flags & IFF_ALLMULTI || 467 netdev_mc_count(net) > AX_MAX_MCAST) { 468 rx_ctl |= AX_RX_CTL_AMALL; 469 } else if (netdev_mc_empty(net)) { 470 /* just broadcast and directed */ 471 } else { 472 /* We use the 20 byte dev->data 473 * for our 8 byte filter buffer 474 * to avoid allocating memory that 475 * is tricky to free later */ 476 struct netdev_hw_addr *ha; 477 u32 crc_bits; 478 479 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE); 480 481 /* Build the multicast hash filter. */ 482 netdev_for_each_mc_addr(ha, net) { 483 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26; 484 data->multi_filter[crc_bits >> 3] |= 485 1 << (crc_bits & 7); 486 } 487 488 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0, 489 AX_MCAST_FILTER_SIZE, data->multi_filter); 490 491 rx_ctl |= AX_RX_CTL_AM; 492 } 493 494 asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL); 495 } 496 497 static int __asix_mdio_read(struct net_device *netdev, int phy_id, int loc, 498 bool in_pm) 499 { 500 struct usbnet *dev = netdev_priv(netdev); 501 __le16 res; 502 int ret; 503 504 mutex_lock(&dev->phy_mutex); 505 506 ret = asix_check_host_enable(dev, in_pm); 507 if (ret == -ENODEV || ret == -ETIMEDOUT) { 508 mutex_unlock(&dev->phy_mutex); 509 return ret; 510 } 511 512 ret = asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, 513 &res, in_pm); 514 if (ret < 0) 515 goto out; 516 517 ret = asix_set_hw_mii(dev, in_pm); 518 out: 519 mutex_unlock(&dev->phy_mutex); 520 521 netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 522 phy_id, loc, le16_to_cpu(res)); 523 524 return ret < 0 ? ret : le16_to_cpu(res); 525 } 526 527 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc) 528 { 529 return __asix_mdio_read(netdev, phy_id, loc, false); 530 } 531 532 static int __asix_mdio_write(struct net_device *netdev, int phy_id, int loc, 533 int val, bool in_pm) 534 { 535 struct usbnet *dev = netdev_priv(netdev); 536 __le16 res = cpu_to_le16(val); 537 int ret; 538 539 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 540 phy_id, loc, val); 541 542 mutex_lock(&dev->phy_mutex); 543 544 ret = asix_check_host_enable(dev, in_pm); 545 if (ret == -ENODEV) 546 goto out; 547 548 ret = asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, 549 &res, in_pm); 550 if (ret < 0) 551 goto out; 552 553 ret = asix_set_hw_mii(dev, in_pm); 554 out: 555 mutex_unlock(&dev->phy_mutex); 556 557 return ret < 0 ? ret : 0; 558 } 559 560 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val) 561 { 562 __asix_mdio_write(netdev, phy_id, loc, val, false); 563 } 564 565 /* MDIO read and write wrappers for phylib */ 566 int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum) 567 { 568 struct usbnet *priv = bus->priv; 569 570 return __asix_mdio_read(priv->net, phy_id, regnum, false); 571 } 572 573 int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val) 574 { 575 struct usbnet *priv = bus->priv; 576 577 return __asix_mdio_write(priv->net, phy_id, regnum, val, false); 578 } 579 580 int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc) 581 { 582 return __asix_mdio_read(netdev, phy_id, loc, true); 583 } 584 585 void 586 asix_mdio_write_nopm(struct net_device *netdev, int phy_id, int loc, int val) 587 { 588 __asix_mdio_write(netdev, phy_id, loc, val, true); 589 } 590 591 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 592 { 593 struct usbnet *dev = netdev_priv(net); 594 u8 opt; 595 596 if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 597 0, 0, 1, &opt, 0) < 0) { 598 wolinfo->supported = 0; 599 wolinfo->wolopts = 0; 600 return; 601 } 602 wolinfo->supported = WAKE_PHY | WAKE_MAGIC; 603 wolinfo->wolopts = 0; 604 if (opt & AX_MONITOR_LINK) 605 wolinfo->wolopts |= WAKE_PHY; 606 if (opt & AX_MONITOR_MAGIC) 607 wolinfo->wolopts |= WAKE_MAGIC; 608 } 609 610 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 611 { 612 struct usbnet *dev = netdev_priv(net); 613 u8 opt = 0; 614 615 if (wolinfo->wolopts & ~(WAKE_PHY | WAKE_MAGIC)) 616 return -EINVAL; 617 618 if (wolinfo->wolopts & WAKE_PHY) 619 opt |= AX_MONITOR_LINK; 620 if (wolinfo->wolopts & WAKE_MAGIC) 621 opt |= AX_MONITOR_MAGIC; 622 623 if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE, 624 opt, 0, 0, NULL, 0) < 0) 625 return -EINVAL; 626 627 return 0; 628 } 629 630 int asix_get_eeprom_len(struct net_device *net) 631 { 632 return AX_EEPROM_LEN; 633 } 634 635 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 636 u8 *data) 637 { 638 struct usbnet *dev = netdev_priv(net); 639 u16 *eeprom_buff; 640 int first_word, last_word; 641 int i; 642 643 if (eeprom->len == 0) 644 return -EINVAL; 645 646 eeprom->magic = AX_EEPROM_MAGIC; 647 648 first_word = eeprom->offset >> 1; 649 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 650 651 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 652 GFP_KERNEL); 653 if (!eeprom_buff) 654 return -ENOMEM; 655 656 /* ax8817x returns 2 bytes from eeprom on read */ 657 for (i = first_word; i <= last_word; i++) { 658 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2, 659 &eeprom_buff[i - first_word], 0) < 0) { 660 kfree(eeprom_buff); 661 return -EIO; 662 } 663 } 664 665 memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len); 666 kfree(eeprom_buff); 667 return 0; 668 } 669 670 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 671 u8 *data) 672 { 673 struct usbnet *dev = netdev_priv(net); 674 u16 *eeprom_buff; 675 int first_word, last_word; 676 int i; 677 int ret; 678 679 netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n", 680 eeprom->len, eeprom->offset, eeprom->magic); 681 682 if (eeprom->len == 0) 683 return -EINVAL; 684 685 if (eeprom->magic != AX_EEPROM_MAGIC) 686 return -EINVAL; 687 688 first_word = eeprom->offset >> 1; 689 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 690 691 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 692 GFP_KERNEL); 693 if (!eeprom_buff) 694 return -ENOMEM; 695 696 /* align data to 16 bit boundaries, read the missing data from 697 the EEPROM */ 698 if (eeprom->offset & 1) { 699 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2, 700 &eeprom_buff[0], 0); 701 if (ret < 0) { 702 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word); 703 goto free; 704 } 705 } 706 707 if ((eeprom->offset + eeprom->len) & 1) { 708 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2, 709 &eeprom_buff[last_word - first_word], 0); 710 if (ret < 0) { 711 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word); 712 goto free; 713 } 714 } 715 716 memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len); 717 718 /* write data to EEPROM */ 719 ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL, 0); 720 if (ret < 0) { 721 netdev_err(net, "Failed to enable EEPROM write\n"); 722 goto free; 723 } 724 msleep(20); 725 726 for (i = first_word; i <= last_word; i++) { 727 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n", 728 i, eeprom_buff[i - first_word]); 729 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i, 730 eeprom_buff[i - first_word], 0, NULL, 0); 731 if (ret < 0) { 732 netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n", 733 i); 734 goto free; 735 } 736 msleep(20); 737 } 738 739 ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL, 0); 740 if (ret < 0) { 741 netdev_err(net, "Failed to disable EEPROM write\n"); 742 goto free; 743 } 744 745 ret = 0; 746 free: 747 kfree(eeprom_buff); 748 return ret; 749 } 750 751 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 752 { 753 /* Inherit standard device info */ 754 usbnet_get_drvinfo(net, info); 755 strscpy(info->driver, DRIVER_NAME, sizeof(info->driver)); 756 strscpy(info->version, DRIVER_VERSION, sizeof(info->version)); 757 } 758 759 int asix_set_mac_address(struct net_device *net, void *p) 760 { 761 struct usbnet *dev = netdev_priv(net); 762 struct asix_data *data = (struct asix_data *)&dev->data; 763 struct sockaddr *addr = p; 764 765 if (netif_running(net)) 766 return -EBUSY; 767 if (!is_valid_ether_addr(addr->sa_data)) 768 return -EADDRNOTAVAIL; 769 770 eth_hw_addr_set(net, addr->sa_data); 771 772 /* We use the 20 byte dev->data 773 * for our 6 byte mac buffer 774 * to avoid allocating memory that 775 * is tricky to free later */ 776 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN); 777 asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN, 778 data->mac_addr); 779 780 return 0; 781 } 782