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 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 < 0)) 31 netdev_warn(dev->net, "Failed to read reg index 0x%04x: %d\n", 32 index, ret); 33 34 return ret; 35 } 36 37 int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, 38 u16 size, void *data, int in_pm) 39 { 40 int ret; 41 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 42 43 BUG_ON(!dev); 44 45 if (!in_pm) 46 fn = usbnet_write_cmd; 47 else 48 fn = usbnet_write_cmd_nopm; 49 50 ret = fn(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 51 value, index, data, size); 52 53 if (unlikely(ret < 0)) 54 netdev_warn(dev->net, "Failed to write reg index 0x%04x: %d\n", 55 index, ret); 56 57 return ret; 58 } 59 60 void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index, 61 u16 size, void *data) 62 { 63 usbnet_write_cmd_async(dev, cmd, 64 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 65 value, index, data, size); 66 } 67 68 static int asix_check_host_enable(struct usbnet *dev, int in_pm) 69 { 70 int i, ret; 71 u8 smsr; 72 73 for (i = 0; i < AX_HOST_EN_RETRIES; ++i) { 74 ret = asix_set_sw_mii(dev, in_pm); 75 if (ret == -ENODEV || ret == -ETIMEDOUT) 76 break; 77 usleep_range(1000, 1100); 78 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 79 0, 0, 1, &smsr, in_pm); 80 if (ret == -ENODEV) 81 break; 82 else if (ret < sizeof(smsr)) 83 continue; 84 else if (smsr & AX_HOST_EN) 85 break; 86 } 87 88 return i >= AX_HOST_EN_RETRIES ? -ETIMEDOUT : ret; 89 } 90 91 static void reset_asix_rx_fixup_info(struct asix_rx_fixup_info *rx) 92 { 93 /* Reset the variables that have a lifetime outside of 94 * asix_rx_fixup_internal() so that future processing starts from a 95 * known set of initial conditions. 96 */ 97 98 if (rx->ax_skb) { 99 /* Discard any incomplete Ethernet frame in the netdev buffer */ 100 kfree_skb(rx->ax_skb); 101 rx->ax_skb = NULL; 102 } 103 104 /* Assume the Data header 32-bit word is at the start of the current 105 * or next URB socket buffer so reset all the state variables. 106 */ 107 rx->remaining = 0; 108 rx->split_head = false; 109 rx->header = 0; 110 } 111 112 int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb, 113 struct asix_rx_fixup_info *rx) 114 { 115 int offset = 0; 116 u16 size; 117 118 /* When an Ethernet frame spans multiple URB socket buffers, 119 * do a sanity test for the Data header synchronisation. 120 * Attempt to detect the situation of the previous socket buffer having 121 * been truncated or a socket buffer was missing. These situations 122 * cause a discontinuity in the data stream and therefore need to avoid 123 * appending bad data to the end of the current netdev socket buffer. 124 * Also avoid unnecessarily discarding a good current netdev socket 125 * buffer. 126 */ 127 if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) { 128 offset = ((rx->remaining + 1) & 0xfffe); 129 rx->header = get_unaligned_le32(skb->data + offset); 130 offset = 0; 131 132 size = (u16)(rx->header & 0x7ff); 133 if (size != ((~rx->header >> 16) & 0x7ff)) { 134 netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n", 135 rx->remaining); 136 reset_asix_rx_fixup_info(rx); 137 } 138 } 139 140 while (offset + sizeof(u16) <= skb->len) { 141 u16 copy_length; 142 143 if (!rx->remaining) { 144 if (skb->len - offset == sizeof(u16)) { 145 rx->header = get_unaligned_le16( 146 skb->data + offset); 147 rx->split_head = true; 148 offset += sizeof(u16); 149 break; 150 } 151 152 if (rx->split_head == true) { 153 rx->header |= (get_unaligned_le16( 154 skb->data + offset) << 16); 155 rx->split_head = false; 156 offset += sizeof(u16); 157 } else { 158 rx->header = get_unaligned_le32(skb->data + 159 offset); 160 offset += sizeof(u32); 161 } 162 163 /* take frame length from Data header 32-bit word */ 164 size = (u16)(rx->header & 0x7ff); 165 if (size != ((~rx->header >> 16) & 0x7ff)) { 166 netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n", 167 rx->header, offset); 168 reset_asix_rx_fixup_info(rx); 169 return 0; 170 } 171 if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) { 172 netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n", 173 size); 174 reset_asix_rx_fixup_info(rx); 175 return 0; 176 } 177 178 /* Sometimes may fail to get a netdev socket buffer but 179 * continue to process the URB socket buffer so that 180 * synchronisation of the Ethernet frame Data header 181 * word is maintained. 182 */ 183 rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size); 184 185 rx->remaining = size; 186 } 187 188 if (rx->remaining > skb->len - offset) { 189 copy_length = skb->len - offset; 190 rx->remaining -= copy_length; 191 } else { 192 copy_length = rx->remaining; 193 rx->remaining = 0; 194 } 195 196 if (rx->ax_skb) { 197 skb_put_data(rx->ax_skb, skb->data + offset, 198 copy_length); 199 if (!rx->remaining) { 200 usbnet_skb_return(dev, rx->ax_skb); 201 rx->ax_skb = NULL; 202 } 203 } 204 205 offset += (copy_length + 1) & 0xfffe; 206 } 207 208 if (skb->len != offset) { 209 netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n", 210 skb->len, offset); 211 reset_asix_rx_fixup_info(rx); 212 return 0; 213 } 214 215 return 1; 216 } 217 218 int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb) 219 { 220 struct asix_common_private *dp = dev->driver_priv; 221 struct asix_rx_fixup_info *rx = &dp->rx_fixup_info; 222 223 return asix_rx_fixup_internal(dev, skb, rx); 224 } 225 226 void asix_rx_fixup_common_free(struct asix_common_private *dp) 227 { 228 struct asix_rx_fixup_info *rx; 229 230 if (!dp) 231 return; 232 233 rx = &dp->rx_fixup_info; 234 235 if (rx->ax_skb) { 236 kfree_skb(rx->ax_skb); 237 rx->ax_skb = NULL; 238 } 239 } 240 241 struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb, 242 gfp_t flags) 243 { 244 int padlen; 245 int headroom = skb_headroom(skb); 246 int tailroom = skb_tailroom(skb); 247 u32 packet_len; 248 u32 padbytes = 0xffff0000; 249 void *ptr; 250 251 padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4; 252 253 /* We need to push 4 bytes in front of frame (packet_len) 254 * and maybe add 4 bytes after the end (if padlen is 4) 255 * 256 * Avoid skb_copy_expand() expensive call, using following rules : 257 * - We are allowed to push 4 bytes in headroom if skb_header_cloned() 258 * is false (and if we have 4 bytes of headroom) 259 * - We are allowed to put 4 bytes at tail if skb_cloned() 260 * is false (and if we have 4 bytes of tailroom) 261 * 262 * TCP packets for example are cloned, but __skb_header_release() 263 * was called in tcp stack, allowing us to use headroom for our needs. 264 */ 265 if (!skb_header_cloned(skb) && 266 !(padlen && skb_cloned(skb)) && 267 headroom + tailroom >= 4 + padlen) { 268 /* following should not happen, but better be safe */ 269 if (headroom < 4 || 270 tailroom < padlen) { 271 skb->data = memmove(skb->head + 4, skb->data, skb->len); 272 skb_set_tail_pointer(skb, skb->len); 273 } 274 } else { 275 struct sk_buff *skb2; 276 277 skb2 = skb_copy_expand(skb, 4, padlen, flags); 278 dev_kfree_skb_any(skb); 279 skb = skb2; 280 if (!skb) 281 return NULL; 282 } 283 284 packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len; 285 ptr = skb_push(skb, 4); 286 put_unaligned_le32(packet_len, ptr); 287 288 if (padlen) { 289 put_unaligned_le32(padbytes, skb_tail_pointer(skb)); 290 skb_put(skb, sizeof(padbytes)); 291 } 292 293 usbnet_set_skb_tx_stats(skb, 1, 0); 294 return skb; 295 } 296 297 int asix_set_sw_mii(struct usbnet *dev, int in_pm) 298 { 299 int ret; 300 ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL, in_pm); 301 302 if (ret < 0) 303 netdev_err(dev->net, "Failed to enable software MII access\n"); 304 return ret; 305 } 306 307 int asix_set_hw_mii(struct usbnet *dev, int in_pm) 308 { 309 int ret; 310 ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL, in_pm); 311 if (ret < 0) 312 netdev_err(dev->net, "Failed to enable hardware MII access\n"); 313 return ret; 314 } 315 316 int asix_read_phy_addr(struct usbnet *dev, bool internal) 317 { 318 int ret, offset; 319 u8 buf[2]; 320 321 ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf, 0); 322 if (ret < 0) 323 goto error; 324 325 if (ret < 2) { 326 ret = -EIO; 327 goto error; 328 } 329 330 offset = (internal ? 1 : 0); 331 ret = buf[offset]; 332 333 netdev_dbg(dev->net, "%s PHY address 0x%x\n", 334 internal ? "internal" : "external", ret); 335 336 return ret; 337 338 error: 339 netdev_err(dev->net, "Error reading PHY_ID register: %02x\n", ret); 340 341 return ret; 342 } 343 344 int asix_sw_reset(struct usbnet *dev, u8 flags, int in_pm) 345 { 346 int ret; 347 348 ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL, in_pm); 349 if (ret < 0) 350 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret); 351 352 return ret; 353 } 354 355 u16 asix_read_rx_ctl(struct usbnet *dev, int in_pm) 356 { 357 __le16 v; 358 int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v, in_pm); 359 360 if (ret < 0) { 361 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret); 362 goto out; 363 } 364 ret = le16_to_cpu(v); 365 out: 366 return ret; 367 } 368 369 int asix_write_rx_ctl(struct usbnet *dev, u16 mode, int in_pm) 370 { 371 int ret; 372 373 netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode); 374 ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL, in_pm); 375 if (ret < 0) 376 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n", 377 mode, ret); 378 379 return ret; 380 } 381 382 u16 asix_read_medium_status(struct usbnet *dev, int in_pm) 383 { 384 __le16 v; 385 int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 386 0, 0, 2, &v, in_pm); 387 388 if (ret < 0) { 389 netdev_err(dev->net, "Error reading Medium Status register: %02x\n", 390 ret); 391 return ret; /* TODO: callers not checking for error ret */ 392 } 393 394 return le16_to_cpu(v); 395 396 } 397 398 int asix_write_medium_mode(struct usbnet *dev, u16 mode, int in_pm) 399 { 400 int ret; 401 402 netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode); 403 ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, 404 mode, 0, 0, NULL, in_pm); 405 if (ret < 0) 406 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n", 407 mode, ret); 408 409 return ret; 410 } 411 412 /* set MAC link settings according to information from phylib */ 413 void asix_adjust_link(struct net_device *netdev) 414 { 415 struct phy_device *phydev = netdev->phydev; 416 struct usbnet *dev = netdev_priv(netdev); 417 u16 mode = 0; 418 419 if (phydev->link) { 420 mode = AX88772_MEDIUM_DEFAULT; 421 422 if (phydev->duplex == DUPLEX_HALF) 423 mode &= ~AX_MEDIUM_FD; 424 425 if (phydev->speed != SPEED_100) 426 mode &= ~AX_MEDIUM_PS; 427 } 428 429 asix_write_medium_mode(dev, mode, 0); 430 phy_print_status(phydev); 431 } 432 433 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm) 434 { 435 int ret; 436 437 netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value); 438 ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL, in_pm); 439 if (ret < 0) 440 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n", 441 value, ret); 442 443 if (sleep) 444 msleep(sleep); 445 446 return ret; 447 } 448 449 /* 450 * AX88772 & AX88178 have a 16-bit RX_CTL value 451 */ 452 void asix_set_multicast(struct net_device *net) 453 { 454 struct usbnet *dev = netdev_priv(net); 455 struct asix_data *data = (struct asix_data *)&dev->data; 456 u16 rx_ctl = AX_DEFAULT_RX_CTL; 457 458 if (net->flags & IFF_PROMISC) { 459 rx_ctl |= AX_RX_CTL_PRO; 460 } else if (net->flags & IFF_ALLMULTI || 461 netdev_mc_count(net) > AX_MAX_MCAST) { 462 rx_ctl |= AX_RX_CTL_AMALL; 463 } else if (netdev_mc_empty(net)) { 464 /* just broadcast and directed */ 465 } else { 466 /* We use the 20 byte dev->data 467 * for our 8 byte filter buffer 468 * to avoid allocating memory that 469 * is tricky to free later */ 470 struct netdev_hw_addr *ha; 471 u32 crc_bits; 472 473 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE); 474 475 /* Build the multicast hash filter. */ 476 netdev_for_each_mc_addr(ha, net) { 477 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26; 478 data->multi_filter[crc_bits >> 3] |= 479 1 << (crc_bits & 7); 480 } 481 482 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0, 483 AX_MCAST_FILTER_SIZE, data->multi_filter); 484 485 rx_ctl |= AX_RX_CTL_AM; 486 } 487 488 asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL); 489 } 490 491 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc) 492 { 493 struct usbnet *dev = netdev_priv(netdev); 494 __le16 res; 495 int ret; 496 497 mutex_lock(&dev->phy_mutex); 498 499 ret = asix_check_host_enable(dev, 0); 500 if (ret == -ENODEV || ret == -ETIMEDOUT) { 501 mutex_unlock(&dev->phy_mutex); 502 return ret; 503 } 504 505 ret = asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, 506 &res, 0); 507 if (ret < 0) 508 goto out; 509 510 ret = asix_set_hw_mii(dev, 0); 511 out: 512 mutex_unlock(&dev->phy_mutex); 513 514 netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 515 phy_id, loc, le16_to_cpu(res)); 516 517 return ret < 0 ? ret : le16_to_cpu(res); 518 } 519 520 static int __asix_mdio_write(struct net_device *netdev, int phy_id, int loc, 521 int val) 522 { 523 struct usbnet *dev = netdev_priv(netdev); 524 __le16 res = cpu_to_le16(val); 525 int ret; 526 527 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 528 phy_id, loc, val); 529 530 mutex_lock(&dev->phy_mutex); 531 532 ret = asix_check_host_enable(dev, 0); 533 if (ret == -ENODEV) 534 goto out; 535 536 ret = asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, 537 &res, 0); 538 if (ret < 0) 539 goto out; 540 541 ret = asix_set_hw_mii(dev, 0); 542 out: 543 mutex_unlock(&dev->phy_mutex); 544 545 return ret < 0 ? ret : 0; 546 } 547 548 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val) 549 { 550 __asix_mdio_write(netdev, phy_id, loc, val); 551 } 552 553 /* MDIO read and write wrappers for phylib */ 554 int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum) 555 { 556 struct usbnet *priv = bus->priv; 557 558 return asix_mdio_read(priv->net, phy_id, regnum); 559 } 560 561 int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val) 562 { 563 struct usbnet *priv = bus->priv; 564 565 return __asix_mdio_write(priv->net, phy_id, regnum, val); 566 } 567 568 int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc) 569 { 570 struct usbnet *dev = netdev_priv(netdev); 571 __le16 res; 572 int ret; 573 574 mutex_lock(&dev->phy_mutex); 575 576 ret = asix_check_host_enable(dev, 1); 577 if (ret == -ENODEV || ret == -ETIMEDOUT) { 578 mutex_unlock(&dev->phy_mutex); 579 return ret; 580 } 581 582 asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, 583 (__u16)loc, 2, &res, 1); 584 asix_set_hw_mii(dev, 1); 585 mutex_unlock(&dev->phy_mutex); 586 587 netdev_dbg(dev->net, "asix_mdio_read_nopm() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 588 phy_id, loc, le16_to_cpu(res)); 589 590 return le16_to_cpu(res); 591 } 592 593 void 594 asix_mdio_write_nopm(struct net_device *netdev, int phy_id, int loc, int val) 595 { 596 struct usbnet *dev = netdev_priv(netdev); 597 __le16 res = cpu_to_le16(val); 598 int ret; 599 600 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 601 phy_id, loc, val); 602 603 mutex_lock(&dev->phy_mutex); 604 605 ret = asix_check_host_enable(dev, 1); 606 if (ret == -ENODEV) { 607 mutex_unlock(&dev->phy_mutex); 608 return; 609 } 610 611 asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, 612 (__u16)loc, 2, &res, 1); 613 asix_set_hw_mii(dev, 1); 614 mutex_unlock(&dev->phy_mutex); 615 } 616 617 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 618 { 619 struct usbnet *dev = netdev_priv(net); 620 u8 opt; 621 622 if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 623 0, 0, 1, &opt, 0) < 0) { 624 wolinfo->supported = 0; 625 wolinfo->wolopts = 0; 626 return; 627 } 628 wolinfo->supported = WAKE_PHY | WAKE_MAGIC; 629 wolinfo->wolopts = 0; 630 if (opt & AX_MONITOR_LINK) 631 wolinfo->wolopts |= WAKE_PHY; 632 if (opt & AX_MONITOR_MAGIC) 633 wolinfo->wolopts |= WAKE_MAGIC; 634 } 635 636 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 637 { 638 struct usbnet *dev = netdev_priv(net); 639 u8 opt = 0; 640 641 if (wolinfo->wolopts & ~(WAKE_PHY | WAKE_MAGIC)) 642 return -EINVAL; 643 644 if (wolinfo->wolopts & WAKE_PHY) 645 opt |= AX_MONITOR_LINK; 646 if (wolinfo->wolopts & WAKE_MAGIC) 647 opt |= AX_MONITOR_MAGIC; 648 649 if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE, 650 opt, 0, 0, NULL, 0) < 0) 651 return -EINVAL; 652 653 return 0; 654 } 655 656 int asix_get_eeprom_len(struct net_device *net) 657 { 658 return AX_EEPROM_LEN; 659 } 660 661 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 662 u8 *data) 663 { 664 struct usbnet *dev = netdev_priv(net); 665 u16 *eeprom_buff; 666 int first_word, last_word; 667 int i; 668 669 if (eeprom->len == 0) 670 return -EINVAL; 671 672 eeprom->magic = AX_EEPROM_MAGIC; 673 674 first_word = eeprom->offset >> 1; 675 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 676 677 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 678 GFP_KERNEL); 679 if (!eeprom_buff) 680 return -ENOMEM; 681 682 /* ax8817x returns 2 bytes from eeprom on read */ 683 for (i = first_word; i <= last_word; i++) { 684 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2, 685 &eeprom_buff[i - first_word], 0) < 0) { 686 kfree(eeprom_buff); 687 return -EIO; 688 } 689 } 690 691 memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len); 692 kfree(eeprom_buff); 693 return 0; 694 } 695 696 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 697 u8 *data) 698 { 699 struct usbnet *dev = netdev_priv(net); 700 u16 *eeprom_buff; 701 int first_word, last_word; 702 int i; 703 int ret; 704 705 netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n", 706 eeprom->len, eeprom->offset, eeprom->magic); 707 708 if (eeprom->len == 0) 709 return -EINVAL; 710 711 if (eeprom->magic != AX_EEPROM_MAGIC) 712 return -EINVAL; 713 714 first_word = eeprom->offset >> 1; 715 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 716 717 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 718 GFP_KERNEL); 719 if (!eeprom_buff) 720 return -ENOMEM; 721 722 /* align data to 16 bit boundaries, read the missing data from 723 the EEPROM */ 724 if (eeprom->offset & 1) { 725 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2, 726 &eeprom_buff[0], 0); 727 if (ret < 0) { 728 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word); 729 goto free; 730 } 731 } 732 733 if ((eeprom->offset + eeprom->len) & 1) { 734 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2, 735 &eeprom_buff[last_word - first_word], 0); 736 if (ret < 0) { 737 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word); 738 goto free; 739 } 740 } 741 742 memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len); 743 744 /* write data to EEPROM */ 745 ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL, 0); 746 if (ret < 0) { 747 netdev_err(net, "Failed to enable EEPROM write\n"); 748 goto free; 749 } 750 msleep(20); 751 752 for (i = first_word; i <= last_word; i++) { 753 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n", 754 i, eeprom_buff[i - first_word]); 755 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i, 756 eeprom_buff[i - first_word], 0, NULL, 0); 757 if (ret < 0) { 758 netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n", 759 i); 760 goto free; 761 } 762 msleep(20); 763 } 764 765 ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL, 0); 766 if (ret < 0) { 767 netdev_err(net, "Failed to disable EEPROM write\n"); 768 goto free; 769 } 770 771 ret = 0; 772 free: 773 kfree(eeprom_buff); 774 return ret; 775 } 776 777 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 778 { 779 /* Inherit standard device info */ 780 usbnet_get_drvinfo(net, info); 781 strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver)); 782 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 783 } 784 785 int asix_set_mac_address(struct net_device *net, void *p) 786 { 787 struct usbnet *dev = netdev_priv(net); 788 struct asix_data *data = (struct asix_data *)&dev->data; 789 struct sockaddr *addr = p; 790 791 if (netif_running(net)) 792 return -EBUSY; 793 if (!is_valid_ether_addr(addr->sa_data)) 794 return -EADDRNOTAVAIL; 795 796 eth_hw_addr_set(net, addr->sa_data); 797 798 /* We use the 20 byte dev->data 799 * for our 6 byte mac buffer 800 * to avoid allocating memory that 801 * is tricky to free later */ 802 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN); 803 asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN, 804 data->mac_addr); 805 806 return 0; 807 } 808