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 int asix_check_host_enable(struct usbnet *dev, int in_pm) 67 { 68 int i, ret; 69 u8 smsr; 70 71 for (i = 0; i < 30; ++i) { 72 ret = asix_set_sw_mii(dev, in_pm); 73 if (ret == -ENODEV || ret == -ETIMEDOUT) 74 break; 75 usleep_range(1000, 1100); 76 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 77 0, 0, 1, &smsr, in_pm); 78 if (ret == -ENODEV) 79 break; 80 else if (ret < 0) 81 continue; 82 else if (smsr & AX_HOST_EN) 83 break; 84 } 85 86 return ret; 87 } 88 89 static void reset_asix_rx_fixup_info(struct asix_rx_fixup_info *rx) 90 { 91 /* Reset the variables that have a lifetime outside of 92 * asix_rx_fixup_internal() so that future processing starts from a 93 * known set of initial conditions. 94 */ 95 96 if (rx->ax_skb) { 97 /* Discard any incomplete Ethernet frame in the netdev buffer */ 98 kfree_skb(rx->ax_skb); 99 rx->ax_skb = NULL; 100 } 101 102 /* Assume the Data header 32-bit word is at the start of the current 103 * or next URB socket buffer so reset all the state variables. 104 */ 105 rx->remaining = 0; 106 rx->split_head = false; 107 rx->header = 0; 108 } 109 110 int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb, 111 struct asix_rx_fixup_info *rx) 112 { 113 int offset = 0; 114 u16 size; 115 116 /* When an Ethernet frame spans multiple URB socket buffers, 117 * do a sanity test for the Data header synchronisation. 118 * Attempt to detect the situation of the previous socket buffer having 119 * been truncated or a socket buffer was missing. These situations 120 * cause a discontinuity in the data stream and therefore need to avoid 121 * appending bad data to the end of the current netdev socket buffer. 122 * Also avoid unnecessarily discarding a good current netdev socket 123 * buffer. 124 */ 125 if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) { 126 offset = ((rx->remaining + 1) & 0xfffe); 127 rx->header = get_unaligned_le32(skb->data + offset); 128 offset = 0; 129 130 size = (u16)(rx->header & 0x7ff); 131 if (size != ((~rx->header >> 16) & 0x7ff)) { 132 netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n", 133 rx->remaining); 134 reset_asix_rx_fixup_info(rx); 135 } 136 } 137 138 while (offset + sizeof(u16) <= skb->len) { 139 u16 copy_length; 140 141 if (!rx->remaining) { 142 if (skb->len - offset == sizeof(u16)) { 143 rx->header = get_unaligned_le16( 144 skb->data + offset); 145 rx->split_head = true; 146 offset += sizeof(u16); 147 break; 148 } 149 150 if (rx->split_head == true) { 151 rx->header |= (get_unaligned_le16( 152 skb->data + offset) << 16); 153 rx->split_head = false; 154 offset += sizeof(u16); 155 } else { 156 rx->header = get_unaligned_le32(skb->data + 157 offset); 158 offset += sizeof(u32); 159 } 160 161 /* take frame length from Data header 32-bit word */ 162 size = (u16)(rx->header & 0x7ff); 163 if (size != ((~rx->header >> 16) & 0x7ff)) { 164 netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n", 165 rx->header, offset); 166 reset_asix_rx_fixup_info(rx); 167 return 0; 168 } 169 if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) { 170 netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n", 171 size); 172 reset_asix_rx_fixup_info(rx); 173 return 0; 174 } 175 176 /* Sometimes may fail to get a netdev socket buffer but 177 * continue to process the URB socket buffer so that 178 * synchronisation of the Ethernet frame Data header 179 * word is maintained. 180 */ 181 rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size); 182 183 rx->remaining = size; 184 } 185 186 if (rx->remaining > skb->len - offset) { 187 copy_length = skb->len - offset; 188 rx->remaining -= copy_length; 189 } else { 190 copy_length = rx->remaining; 191 rx->remaining = 0; 192 } 193 194 if (rx->ax_skb) { 195 skb_put_data(rx->ax_skb, skb->data + offset, 196 copy_length); 197 if (!rx->remaining) { 198 usbnet_skb_return(dev, rx->ax_skb); 199 rx->ax_skb = NULL; 200 } 201 } 202 203 offset += (copy_length + 1) & 0xfffe; 204 } 205 206 if (skb->len != offset) { 207 netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n", 208 skb->len, offset); 209 reset_asix_rx_fixup_info(rx); 210 return 0; 211 } 212 213 return 1; 214 } 215 216 int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb) 217 { 218 struct asix_common_private *dp = dev->driver_priv; 219 struct asix_rx_fixup_info *rx = &dp->rx_fixup_info; 220 221 return asix_rx_fixup_internal(dev, skb, rx); 222 } 223 224 void asix_rx_fixup_common_free(struct asix_common_private *dp) 225 { 226 struct asix_rx_fixup_info *rx; 227 228 if (!dp) 229 return; 230 231 rx = &dp->rx_fixup_info; 232 233 if (rx->ax_skb) { 234 kfree_skb(rx->ax_skb); 235 rx->ax_skb = NULL; 236 } 237 } 238 239 struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb, 240 gfp_t flags) 241 { 242 int padlen; 243 int headroom = skb_headroom(skb); 244 int tailroom = skb_tailroom(skb); 245 u32 packet_len; 246 u32 padbytes = 0xffff0000; 247 void *ptr; 248 249 padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4; 250 251 /* We need to push 4 bytes in front of frame (packet_len) 252 * and maybe add 4 bytes after the end (if padlen is 4) 253 * 254 * Avoid skb_copy_expand() expensive call, using following rules : 255 * - We are allowed to push 4 bytes in headroom if skb_header_cloned() 256 * is false (and if we have 4 bytes of headroom) 257 * - We are allowed to put 4 bytes at tail if skb_cloned() 258 * is false (and if we have 4 bytes of tailroom) 259 * 260 * TCP packets for example are cloned, but __skb_header_release() 261 * was called in tcp stack, allowing us to use headroom for our needs. 262 */ 263 if (!skb_header_cloned(skb) && 264 !(padlen && skb_cloned(skb)) && 265 headroom + tailroom >= 4 + padlen) { 266 /* following should not happen, but better be safe */ 267 if (headroom < 4 || 268 tailroom < padlen) { 269 skb->data = memmove(skb->head + 4, skb->data, skb->len); 270 skb_set_tail_pointer(skb, skb->len); 271 } 272 } else { 273 struct sk_buff *skb2; 274 275 skb2 = skb_copy_expand(skb, 4, padlen, flags); 276 dev_kfree_skb_any(skb); 277 skb = skb2; 278 if (!skb) 279 return NULL; 280 } 281 282 packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len; 283 ptr = skb_push(skb, 4); 284 put_unaligned_le32(packet_len, ptr); 285 286 if (padlen) { 287 put_unaligned_le32(padbytes, skb_tail_pointer(skb)); 288 skb_put(skb, sizeof(padbytes)); 289 } 290 291 usbnet_set_skb_tx_stats(skb, 1, 0); 292 return skb; 293 } 294 295 int asix_set_sw_mii(struct usbnet *dev, int in_pm) 296 { 297 int ret; 298 ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL, in_pm); 299 300 if (ret < 0) 301 netdev_err(dev->net, "Failed to enable software MII access\n"); 302 return ret; 303 } 304 305 int asix_set_hw_mii(struct usbnet *dev, int in_pm) 306 { 307 int ret; 308 ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL, in_pm); 309 if (ret < 0) 310 netdev_err(dev->net, "Failed to enable hardware MII access\n"); 311 return ret; 312 } 313 314 int asix_read_phy_addr(struct usbnet *dev, bool internal) 315 { 316 int ret, offset; 317 u8 buf[2]; 318 319 ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf, 0); 320 if (ret < 0) 321 goto error; 322 323 if (ret < 2) { 324 ret = -EIO; 325 goto error; 326 } 327 328 offset = (internal ? 1 : 0); 329 ret = buf[offset]; 330 331 netdev_dbg(dev->net, "%s PHY address 0x%x\n", 332 internal ? "internal" : "external", ret); 333 334 return ret; 335 336 error: 337 netdev_err(dev->net, "Error reading PHY_ID register: %02x\n", ret); 338 339 return ret; 340 } 341 342 int asix_sw_reset(struct usbnet *dev, u8 flags, int in_pm) 343 { 344 int ret; 345 346 ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL, in_pm); 347 if (ret < 0) 348 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret); 349 350 return ret; 351 } 352 353 u16 asix_read_rx_ctl(struct usbnet *dev, int in_pm) 354 { 355 __le16 v; 356 int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v, in_pm); 357 358 if (ret < 0) { 359 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret); 360 goto out; 361 } 362 ret = le16_to_cpu(v); 363 out: 364 return ret; 365 } 366 367 int asix_write_rx_ctl(struct usbnet *dev, u16 mode, int in_pm) 368 { 369 int ret; 370 371 netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode); 372 ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL, in_pm); 373 if (ret < 0) 374 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n", 375 mode, ret); 376 377 return ret; 378 } 379 380 u16 asix_read_medium_status(struct usbnet *dev, int in_pm) 381 { 382 __le16 v; 383 int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 384 0, 0, 2, &v, in_pm); 385 386 if (ret < 0) { 387 netdev_err(dev->net, "Error reading Medium Status register: %02x\n", 388 ret); 389 return ret; /* TODO: callers not checking for error ret */ 390 } 391 392 return le16_to_cpu(v); 393 394 } 395 396 int asix_write_medium_mode(struct usbnet *dev, u16 mode, int in_pm) 397 { 398 int ret; 399 400 netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode); 401 ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, 402 mode, 0, 0, NULL, in_pm); 403 if (ret < 0) 404 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n", 405 mode, ret); 406 407 return ret; 408 } 409 410 /* set MAC link settings according to information from phylib */ 411 void asix_adjust_link(struct net_device *netdev) 412 { 413 struct phy_device *phydev = netdev->phydev; 414 struct usbnet *dev = netdev_priv(netdev); 415 u16 mode = 0; 416 417 if (phydev->link) { 418 mode = AX88772_MEDIUM_DEFAULT; 419 420 if (phydev->duplex == DUPLEX_HALF) 421 mode &= ~AX_MEDIUM_FD; 422 423 if (phydev->speed != SPEED_100) 424 mode &= ~AX_MEDIUM_PS; 425 } 426 427 asix_write_medium_mode(dev, mode, 0); 428 phy_print_status(phydev); 429 } 430 431 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm) 432 { 433 int ret; 434 435 netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value); 436 ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL, in_pm); 437 if (ret < 0) 438 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n", 439 value, ret); 440 441 if (sleep) 442 msleep(sleep); 443 444 return ret; 445 } 446 447 /* 448 * AX88772 & AX88178 have a 16-bit RX_CTL value 449 */ 450 void asix_set_multicast(struct net_device *net) 451 { 452 struct usbnet *dev = netdev_priv(net); 453 struct asix_data *data = (struct asix_data *)&dev->data; 454 u16 rx_ctl = AX_DEFAULT_RX_CTL; 455 456 if (net->flags & IFF_PROMISC) { 457 rx_ctl |= AX_RX_CTL_PRO; 458 } else if (net->flags & IFF_ALLMULTI || 459 netdev_mc_count(net) > AX_MAX_MCAST) { 460 rx_ctl |= AX_RX_CTL_AMALL; 461 } else if (netdev_mc_empty(net)) { 462 /* just broadcast and directed */ 463 } else { 464 /* We use the 20 byte dev->data 465 * for our 8 byte filter buffer 466 * to avoid allocating memory that 467 * is tricky to free later */ 468 struct netdev_hw_addr *ha; 469 u32 crc_bits; 470 471 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE); 472 473 /* Build the multicast hash filter. */ 474 netdev_for_each_mc_addr(ha, net) { 475 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26; 476 data->multi_filter[crc_bits >> 3] |= 477 1 << (crc_bits & 7); 478 } 479 480 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0, 481 AX_MCAST_FILTER_SIZE, data->multi_filter); 482 483 rx_ctl |= AX_RX_CTL_AM; 484 } 485 486 asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL); 487 } 488 489 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc) 490 { 491 struct usbnet *dev = netdev_priv(netdev); 492 __le16 res; 493 int ret; 494 495 mutex_lock(&dev->phy_mutex); 496 497 ret = asix_check_host_enable(dev, 0); 498 if (ret == -ENODEV || ret == -ETIMEDOUT) { 499 mutex_unlock(&dev->phy_mutex); 500 return ret; 501 } 502 503 ret = asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, 504 &res, 0); 505 if (ret < 0) 506 goto out; 507 508 ret = asix_set_hw_mii(dev, 0); 509 out: 510 mutex_unlock(&dev->phy_mutex); 511 512 netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 513 phy_id, loc, le16_to_cpu(res)); 514 515 return ret < 0 ? ret : le16_to_cpu(res); 516 } 517 518 static int __asix_mdio_write(struct net_device *netdev, int phy_id, int loc, 519 int val) 520 { 521 struct usbnet *dev = netdev_priv(netdev); 522 __le16 res = cpu_to_le16(val); 523 int ret; 524 525 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 526 phy_id, loc, val); 527 528 mutex_lock(&dev->phy_mutex); 529 530 ret = asix_check_host_enable(dev, 0); 531 if (ret == -ENODEV) 532 goto out; 533 534 ret = asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, 535 &res, 0); 536 if (ret < 0) 537 goto out; 538 539 ret = asix_set_hw_mii(dev, 0); 540 out: 541 mutex_unlock(&dev->phy_mutex); 542 543 return ret < 0 ? ret : 0; 544 } 545 546 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val) 547 { 548 __asix_mdio_write(netdev, phy_id, loc, val); 549 } 550 551 /* MDIO read and write wrappers for phylib */ 552 int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum) 553 { 554 struct usbnet *priv = bus->priv; 555 556 return asix_mdio_read(priv->net, phy_id, regnum); 557 } 558 559 int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val) 560 { 561 struct usbnet *priv = bus->priv; 562 563 return __asix_mdio_write(priv->net, phy_id, regnum, val); 564 } 565 566 int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc) 567 { 568 struct usbnet *dev = netdev_priv(netdev); 569 __le16 res; 570 int ret; 571 572 mutex_lock(&dev->phy_mutex); 573 574 ret = asix_check_host_enable(dev, 1); 575 if (ret == -ENODEV || ret == -ETIMEDOUT) { 576 mutex_unlock(&dev->phy_mutex); 577 return ret; 578 } 579 580 asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, 581 (__u16)loc, 2, &res, 1); 582 asix_set_hw_mii(dev, 1); 583 mutex_unlock(&dev->phy_mutex); 584 585 netdev_dbg(dev->net, "asix_mdio_read_nopm() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 586 phy_id, loc, le16_to_cpu(res)); 587 588 return le16_to_cpu(res); 589 } 590 591 void 592 asix_mdio_write_nopm(struct net_device *netdev, int phy_id, int loc, int val) 593 { 594 struct usbnet *dev = netdev_priv(netdev); 595 __le16 res = cpu_to_le16(val); 596 int ret; 597 598 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 599 phy_id, loc, val); 600 601 mutex_lock(&dev->phy_mutex); 602 603 ret = asix_check_host_enable(dev, 1); 604 if (ret == -ENODEV) { 605 mutex_unlock(&dev->phy_mutex); 606 return; 607 } 608 609 asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, 610 (__u16)loc, 2, &res, 1); 611 asix_set_hw_mii(dev, 1); 612 mutex_unlock(&dev->phy_mutex); 613 } 614 615 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 616 { 617 struct usbnet *dev = netdev_priv(net); 618 u8 opt; 619 620 if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 621 0, 0, 1, &opt, 0) < 0) { 622 wolinfo->supported = 0; 623 wolinfo->wolopts = 0; 624 return; 625 } 626 wolinfo->supported = WAKE_PHY | WAKE_MAGIC; 627 wolinfo->wolopts = 0; 628 if (opt & AX_MONITOR_LINK) 629 wolinfo->wolopts |= WAKE_PHY; 630 if (opt & AX_MONITOR_MAGIC) 631 wolinfo->wolopts |= WAKE_MAGIC; 632 } 633 634 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 635 { 636 struct usbnet *dev = netdev_priv(net); 637 u8 opt = 0; 638 639 if (wolinfo->wolopts & ~(WAKE_PHY | WAKE_MAGIC)) 640 return -EINVAL; 641 642 if (wolinfo->wolopts & WAKE_PHY) 643 opt |= AX_MONITOR_LINK; 644 if (wolinfo->wolopts & WAKE_MAGIC) 645 opt |= AX_MONITOR_MAGIC; 646 647 if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE, 648 opt, 0, 0, NULL, 0) < 0) 649 return -EINVAL; 650 651 return 0; 652 } 653 654 int asix_get_eeprom_len(struct net_device *net) 655 { 656 return AX_EEPROM_LEN; 657 } 658 659 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 660 u8 *data) 661 { 662 struct usbnet *dev = netdev_priv(net); 663 u16 *eeprom_buff; 664 int first_word, last_word; 665 int i; 666 667 if (eeprom->len == 0) 668 return -EINVAL; 669 670 eeprom->magic = AX_EEPROM_MAGIC; 671 672 first_word = eeprom->offset >> 1; 673 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 674 675 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 676 GFP_KERNEL); 677 if (!eeprom_buff) 678 return -ENOMEM; 679 680 /* ax8817x returns 2 bytes from eeprom on read */ 681 for (i = first_word; i <= last_word; i++) { 682 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2, 683 &eeprom_buff[i - first_word], 0) < 0) { 684 kfree(eeprom_buff); 685 return -EIO; 686 } 687 } 688 689 memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len); 690 kfree(eeprom_buff); 691 return 0; 692 } 693 694 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 695 u8 *data) 696 { 697 struct usbnet *dev = netdev_priv(net); 698 u16 *eeprom_buff; 699 int first_word, last_word; 700 int i; 701 int ret; 702 703 netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n", 704 eeprom->len, eeprom->offset, eeprom->magic); 705 706 if (eeprom->len == 0) 707 return -EINVAL; 708 709 if (eeprom->magic != AX_EEPROM_MAGIC) 710 return -EINVAL; 711 712 first_word = eeprom->offset >> 1; 713 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 714 715 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 716 GFP_KERNEL); 717 if (!eeprom_buff) 718 return -ENOMEM; 719 720 /* align data to 16 bit boundaries, read the missing data from 721 the EEPROM */ 722 if (eeprom->offset & 1) { 723 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2, 724 &eeprom_buff[0], 0); 725 if (ret < 0) { 726 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word); 727 goto free; 728 } 729 } 730 731 if ((eeprom->offset + eeprom->len) & 1) { 732 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2, 733 &eeprom_buff[last_word - first_word], 0); 734 if (ret < 0) { 735 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word); 736 goto free; 737 } 738 } 739 740 memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len); 741 742 /* write data to EEPROM */ 743 ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL, 0); 744 if (ret < 0) { 745 netdev_err(net, "Failed to enable EEPROM write\n"); 746 goto free; 747 } 748 msleep(20); 749 750 for (i = first_word; i <= last_word; i++) { 751 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n", 752 i, eeprom_buff[i - first_word]); 753 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i, 754 eeprom_buff[i - first_word], 0, NULL, 0); 755 if (ret < 0) { 756 netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n", 757 i); 758 goto free; 759 } 760 msleep(20); 761 } 762 763 ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL, 0); 764 if (ret < 0) { 765 netdev_err(net, "Failed to disable EEPROM write\n"); 766 goto free; 767 } 768 769 ret = 0; 770 free: 771 kfree(eeprom_buff); 772 return ret; 773 } 774 775 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 776 { 777 /* Inherit standard device info */ 778 usbnet_get_drvinfo(net, info); 779 strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver)); 780 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 781 } 782 783 int asix_set_mac_address(struct net_device *net, void *p) 784 { 785 struct usbnet *dev = netdev_priv(net); 786 struct asix_data *data = (struct asix_data *)&dev->data; 787 struct sockaddr *addr = p; 788 789 if (netif_running(net)) 790 return -EBUSY; 791 if (!is_valid_ether_addr(addr->sa_data)) 792 return -EADDRNOTAVAIL; 793 794 memcpy(net->dev_addr, addr->sa_data, ETH_ALEN); 795 796 /* We use the 20 byte dev->data 797 * for our 6 byte mac buffer 798 * to avoid allocating memory that 799 * is tricky to free later */ 800 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN); 801 asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN, 802 data->mac_addr); 803 804 return 0; 805 } 806