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 < 2) { 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 } 764