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, bool internal) 292 { 293 int ret, offset; 294 u8 buf[2]; 295 296 ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf, 0); 297 if (ret < 0) 298 goto error; 299 300 if (ret < 2) { 301 ret = -EIO; 302 goto error; 303 } 304 305 offset = (internal ? 1 : 0); 306 ret = buf[offset]; 307 308 netdev_dbg(dev->net, "%s PHY address 0x%x\n", 309 internal ? "internal" : "external", ret); 310 311 return ret; 312 313 error: 314 netdev_err(dev->net, "Error reading PHY_ID register: %02x\n", ret); 315 316 return ret; 317 } 318 319 int asix_sw_reset(struct usbnet *dev, u8 flags, int in_pm) 320 { 321 int ret; 322 323 ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL, in_pm); 324 if (ret < 0) 325 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret); 326 327 return ret; 328 } 329 330 u16 asix_read_rx_ctl(struct usbnet *dev, int in_pm) 331 { 332 __le16 v; 333 int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v, in_pm); 334 335 if (ret < 0) { 336 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret); 337 goto out; 338 } 339 ret = le16_to_cpu(v); 340 out: 341 return ret; 342 } 343 344 int asix_write_rx_ctl(struct usbnet *dev, u16 mode, int in_pm) 345 { 346 int ret; 347 348 netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode); 349 ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL, in_pm); 350 if (ret < 0) 351 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n", 352 mode, ret); 353 354 return ret; 355 } 356 357 u16 asix_read_medium_status(struct usbnet *dev, int in_pm) 358 { 359 __le16 v; 360 int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 361 0, 0, 2, &v, in_pm); 362 363 if (ret < 0) { 364 netdev_err(dev->net, "Error reading Medium Status register: %02x\n", 365 ret); 366 return ret; /* TODO: callers not checking for error ret */ 367 } 368 369 return le16_to_cpu(v); 370 371 } 372 373 int asix_write_medium_mode(struct usbnet *dev, u16 mode, int in_pm) 374 { 375 int ret; 376 377 netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode); 378 ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, 379 mode, 0, 0, NULL, in_pm); 380 if (ret < 0) 381 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n", 382 mode, ret); 383 384 return ret; 385 } 386 387 /* set MAC link settings according to information from phylib */ 388 void asix_adjust_link(struct net_device *netdev) 389 { 390 struct phy_device *phydev = netdev->phydev; 391 struct usbnet *dev = netdev_priv(netdev); 392 u16 mode = 0; 393 394 if (phydev->link) { 395 mode = AX88772_MEDIUM_DEFAULT; 396 397 if (phydev->duplex == DUPLEX_HALF) 398 mode &= ~AX_MEDIUM_FD; 399 400 if (phydev->speed != SPEED_100) 401 mode &= ~AX_MEDIUM_PS; 402 } 403 404 asix_write_medium_mode(dev, mode, 0); 405 phy_print_status(phydev); 406 } 407 408 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm) 409 { 410 int ret; 411 412 netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value); 413 ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL, in_pm); 414 if (ret < 0) 415 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n", 416 value, ret); 417 418 if (sleep) 419 msleep(sleep); 420 421 return ret; 422 } 423 424 /* 425 * AX88772 & AX88178 have a 16-bit RX_CTL value 426 */ 427 void asix_set_multicast(struct net_device *net) 428 { 429 struct usbnet *dev = netdev_priv(net); 430 struct asix_data *data = (struct asix_data *)&dev->data; 431 u16 rx_ctl = AX_DEFAULT_RX_CTL; 432 433 if (net->flags & IFF_PROMISC) { 434 rx_ctl |= AX_RX_CTL_PRO; 435 } else if (net->flags & IFF_ALLMULTI || 436 netdev_mc_count(net) > AX_MAX_MCAST) { 437 rx_ctl |= AX_RX_CTL_AMALL; 438 } else if (netdev_mc_empty(net)) { 439 /* just broadcast and directed */ 440 } else { 441 /* We use the 20 byte dev->data 442 * for our 8 byte filter buffer 443 * to avoid allocating memory that 444 * is tricky to free later */ 445 struct netdev_hw_addr *ha; 446 u32 crc_bits; 447 448 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE); 449 450 /* Build the multicast hash filter. */ 451 netdev_for_each_mc_addr(ha, net) { 452 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26; 453 data->multi_filter[crc_bits >> 3] |= 454 1 << (crc_bits & 7); 455 } 456 457 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0, 458 AX_MCAST_FILTER_SIZE, data->multi_filter); 459 460 rx_ctl |= AX_RX_CTL_AM; 461 } 462 463 asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL); 464 } 465 466 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc) 467 { 468 struct usbnet *dev = netdev_priv(netdev); 469 __le16 res; 470 u8 smsr; 471 int i = 0; 472 int ret; 473 474 mutex_lock(&dev->phy_mutex); 475 do { 476 ret = asix_set_sw_mii(dev, 0); 477 if (ret == -ENODEV || ret == -ETIMEDOUT) 478 break; 479 usleep_range(1000, 1100); 480 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 481 0, 0, 1, &smsr, 0); 482 } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV)); 483 if (ret == -ENODEV || ret == -ETIMEDOUT) { 484 mutex_unlock(&dev->phy_mutex); 485 return ret; 486 } 487 488 ret = asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, 489 &res, 0); 490 if (ret < 0) 491 goto out; 492 493 ret = asix_set_hw_mii(dev, 0); 494 out: 495 mutex_unlock(&dev->phy_mutex); 496 497 netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 498 phy_id, loc, le16_to_cpu(res)); 499 500 return ret < 0 ? ret : le16_to_cpu(res); 501 } 502 503 static int __asix_mdio_write(struct net_device *netdev, int phy_id, int loc, 504 int val) 505 { 506 struct usbnet *dev = netdev_priv(netdev); 507 __le16 res = cpu_to_le16(val); 508 u8 smsr; 509 int i = 0; 510 int ret; 511 512 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 513 phy_id, loc, val); 514 515 mutex_lock(&dev->phy_mutex); 516 do { 517 ret = asix_set_sw_mii(dev, 0); 518 if (ret == -ENODEV) 519 break; 520 usleep_range(1000, 1100); 521 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 522 0, 0, 1, &smsr, 0); 523 } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV)); 524 525 if (ret == -ENODEV) 526 goto out; 527 528 ret = asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, 529 &res, 0); 530 if (ret < 0) 531 goto out; 532 533 ret = asix_set_hw_mii(dev, 0); 534 out: 535 mutex_unlock(&dev->phy_mutex); 536 537 return ret < 0 ? ret : 0; 538 } 539 540 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val) 541 { 542 __asix_mdio_write(netdev, phy_id, loc, val); 543 } 544 545 /* MDIO read and write wrappers for phylib */ 546 int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum) 547 { 548 struct usbnet *priv = bus->priv; 549 550 return asix_mdio_read(priv->net, phy_id, regnum); 551 } 552 553 int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val) 554 { 555 struct usbnet *priv = bus->priv; 556 557 return __asix_mdio_write(priv->net, phy_id, regnum, val); 558 } 559 560 int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc) 561 { 562 struct usbnet *dev = netdev_priv(netdev); 563 __le16 res; 564 u8 smsr; 565 int i = 0; 566 int ret; 567 568 mutex_lock(&dev->phy_mutex); 569 do { 570 ret = asix_set_sw_mii(dev, 1); 571 if (ret == -ENODEV || ret == -ETIMEDOUT) 572 break; 573 usleep_range(1000, 1100); 574 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 575 0, 0, 1, &smsr, 1); 576 } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV)); 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 u8 smsr; 599 int i = 0; 600 int ret; 601 602 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 603 phy_id, loc, val); 604 605 mutex_lock(&dev->phy_mutex); 606 do { 607 ret = asix_set_sw_mii(dev, 1); 608 if (ret == -ENODEV) 609 break; 610 usleep_range(1000, 1100); 611 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 612 0, 0, 1, &smsr, 1); 613 } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV)); 614 if (ret == -ENODEV) { 615 mutex_unlock(&dev->phy_mutex); 616 return; 617 } 618 619 asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, 620 (__u16)loc, 2, &res, 1); 621 asix_set_hw_mii(dev, 1); 622 mutex_unlock(&dev->phy_mutex); 623 } 624 625 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 626 { 627 struct usbnet *dev = netdev_priv(net); 628 u8 opt; 629 630 if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 631 0, 0, 1, &opt, 0) < 0) { 632 wolinfo->supported = 0; 633 wolinfo->wolopts = 0; 634 return; 635 } 636 wolinfo->supported = WAKE_PHY | WAKE_MAGIC; 637 wolinfo->wolopts = 0; 638 if (opt & AX_MONITOR_LINK) 639 wolinfo->wolopts |= WAKE_PHY; 640 if (opt & AX_MONITOR_MAGIC) 641 wolinfo->wolopts |= WAKE_MAGIC; 642 } 643 644 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 645 { 646 struct usbnet *dev = netdev_priv(net); 647 u8 opt = 0; 648 649 if (wolinfo->wolopts & ~(WAKE_PHY | WAKE_MAGIC)) 650 return -EINVAL; 651 652 if (wolinfo->wolopts & WAKE_PHY) 653 opt |= AX_MONITOR_LINK; 654 if (wolinfo->wolopts & WAKE_MAGIC) 655 opt |= AX_MONITOR_MAGIC; 656 657 if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE, 658 opt, 0, 0, NULL, 0) < 0) 659 return -EINVAL; 660 661 return 0; 662 } 663 664 int asix_get_eeprom_len(struct net_device *net) 665 { 666 return AX_EEPROM_LEN; 667 } 668 669 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 670 u8 *data) 671 { 672 struct usbnet *dev = netdev_priv(net); 673 u16 *eeprom_buff; 674 int first_word, last_word; 675 int i; 676 677 if (eeprom->len == 0) 678 return -EINVAL; 679 680 eeprom->magic = AX_EEPROM_MAGIC; 681 682 first_word = eeprom->offset >> 1; 683 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 684 685 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 686 GFP_KERNEL); 687 if (!eeprom_buff) 688 return -ENOMEM; 689 690 /* ax8817x returns 2 bytes from eeprom on read */ 691 for (i = first_word; i <= last_word; i++) { 692 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2, 693 &eeprom_buff[i - first_word], 0) < 0) { 694 kfree(eeprom_buff); 695 return -EIO; 696 } 697 } 698 699 memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len); 700 kfree(eeprom_buff); 701 return 0; 702 } 703 704 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 705 u8 *data) 706 { 707 struct usbnet *dev = netdev_priv(net); 708 u16 *eeprom_buff; 709 int first_word, last_word; 710 int i; 711 int ret; 712 713 netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n", 714 eeprom->len, eeprom->offset, eeprom->magic); 715 716 if (eeprom->len == 0) 717 return -EINVAL; 718 719 if (eeprom->magic != AX_EEPROM_MAGIC) 720 return -EINVAL; 721 722 first_word = eeprom->offset >> 1; 723 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 724 725 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 726 GFP_KERNEL); 727 if (!eeprom_buff) 728 return -ENOMEM; 729 730 /* align data to 16 bit boundaries, read the missing data from 731 the EEPROM */ 732 if (eeprom->offset & 1) { 733 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2, 734 &eeprom_buff[0], 0); 735 if (ret < 0) { 736 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word); 737 goto free; 738 } 739 } 740 741 if ((eeprom->offset + eeprom->len) & 1) { 742 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2, 743 &eeprom_buff[last_word - first_word], 0); 744 if (ret < 0) { 745 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word); 746 goto free; 747 } 748 } 749 750 memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len); 751 752 /* write data to EEPROM */ 753 ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL, 0); 754 if (ret < 0) { 755 netdev_err(net, "Failed to enable EEPROM write\n"); 756 goto free; 757 } 758 msleep(20); 759 760 for (i = first_word; i <= last_word; i++) { 761 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n", 762 i, eeprom_buff[i - first_word]); 763 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i, 764 eeprom_buff[i - first_word], 0, NULL, 0); 765 if (ret < 0) { 766 netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n", 767 i); 768 goto free; 769 } 770 msleep(20); 771 } 772 773 ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL, 0); 774 if (ret < 0) { 775 netdev_err(net, "Failed to disable EEPROM write\n"); 776 goto free; 777 } 778 779 ret = 0; 780 free: 781 kfree(eeprom_buff); 782 return ret; 783 } 784 785 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 786 { 787 /* Inherit standard device info */ 788 usbnet_get_drvinfo(net, info); 789 strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver)); 790 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 791 } 792 793 int asix_set_mac_address(struct net_device *net, void *p) 794 { 795 struct usbnet *dev = netdev_priv(net); 796 struct asix_data *data = (struct asix_data *)&dev->data; 797 struct sockaddr *addr = p; 798 799 if (netif_running(net)) 800 return -EBUSY; 801 if (!is_valid_ether_addr(addr->sa_data)) 802 return -EADDRNOTAVAIL; 803 804 memcpy(net->dev_addr, addr->sa_data, ETH_ALEN); 805 806 /* We use the 20 byte dev->data 807 * for our 6 byte mac buffer 808 * to avoid allocating memory that 809 * is tricky to free later */ 810 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN); 811 asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN, 812 data->mac_addr); 813 814 return 0; 815 } 816