1 /* 2 * ASIX AX8817X based USB 2.0 Ethernet Devices 3 * Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com> 4 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net> 5 * Copyright (C) 2006 James Painter <jamie.painter@iname.com> 6 * Copyright (c) 2002-2003 TiVo Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, see <http://www.gnu.org/licenses/>. 20 */ 21 22 #include "asix.h" 23 24 int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, 25 u16 size, void *data, int in_pm) 26 { 27 int ret; 28 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 29 30 BUG_ON(!dev); 31 32 if (!in_pm) 33 fn = usbnet_read_cmd; 34 else 35 fn = usbnet_read_cmd_nopm; 36 37 ret = fn(dev, cmd, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 38 value, index, data, size); 39 40 if (unlikely(ret < 0)) 41 netdev_warn(dev->net, "Failed to read reg index 0x%04x: %d\n", 42 index, ret); 43 44 return ret; 45 } 46 47 int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, 48 u16 size, void *data, int in_pm) 49 { 50 int ret; 51 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 52 53 BUG_ON(!dev); 54 55 if (!in_pm) 56 fn = usbnet_write_cmd; 57 else 58 fn = usbnet_write_cmd_nopm; 59 60 ret = fn(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 61 value, index, data, size); 62 63 if (unlikely(ret < 0)) 64 netdev_warn(dev->net, "Failed to write reg index 0x%04x: %d\n", 65 index, ret); 66 67 return ret; 68 } 69 70 void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index, 71 u16 size, void *data) 72 { 73 usbnet_write_cmd_async(dev, cmd, 74 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 75 value, index, data, size); 76 } 77 78 static void reset_asix_rx_fixup_info(struct asix_rx_fixup_info *rx) 79 { 80 /* Reset the variables that have a lifetime outside of 81 * asix_rx_fixup_internal() so that future processing starts from a 82 * known set of initial conditions. 83 */ 84 85 if (rx->ax_skb) { 86 /* Discard any incomplete Ethernet frame in the netdev buffer */ 87 kfree_skb(rx->ax_skb); 88 rx->ax_skb = NULL; 89 } 90 91 /* Assume the Data header 32-bit word is at the start of the current 92 * or next URB socket buffer so reset all the state variables. 93 */ 94 rx->remaining = 0; 95 rx->split_head = false; 96 rx->header = 0; 97 } 98 99 int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb, 100 struct asix_rx_fixup_info *rx) 101 { 102 int offset = 0; 103 u16 size; 104 105 /* When an Ethernet frame spans multiple URB socket buffers, 106 * do a sanity test for the Data header synchronisation. 107 * Attempt to detect the situation of the previous socket buffer having 108 * been truncated or a socket buffer was missing. These situations 109 * cause a discontinuity in the data stream and therefore need to avoid 110 * appending bad data to the end of the current netdev socket buffer. 111 * Also avoid unnecessarily discarding a good current netdev socket 112 * buffer. 113 */ 114 if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) { 115 offset = ((rx->remaining + 1) & 0xfffe); 116 rx->header = get_unaligned_le32(skb->data + offset); 117 offset = 0; 118 119 size = (u16)(rx->header & 0x7ff); 120 if (size != ((~rx->header >> 16) & 0x7ff)) { 121 netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n", 122 rx->remaining); 123 reset_asix_rx_fixup_info(rx); 124 } 125 } 126 127 while (offset + sizeof(u16) <= skb->len) { 128 u16 copy_length; 129 130 if (!rx->remaining) { 131 if (skb->len - offset == sizeof(u16)) { 132 rx->header = get_unaligned_le16( 133 skb->data + offset); 134 rx->split_head = true; 135 offset += sizeof(u16); 136 break; 137 } 138 139 if (rx->split_head == true) { 140 rx->header |= (get_unaligned_le16( 141 skb->data + offset) << 16); 142 rx->split_head = false; 143 offset += sizeof(u16); 144 } else { 145 rx->header = get_unaligned_le32(skb->data + 146 offset); 147 offset += sizeof(u32); 148 } 149 150 /* take frame length from Data header 32-bit word */ 151 size = (u16)(rx->header & 0x7ff); 152 if (size != ((~rx->header >> 16) & 0x7ff)) { 153 netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n", 154 rx->header, offset); 155 reset_asix_rx_fixup_info(rx); 156 return 0; 157 } 158 if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) { 159 netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n", 160 size); 161 reset_asix_rx_fixup_info(rx); 162 return 0; 163 } 164 165 /* Sometimes may fail to get a netdev socket buffer but 166 * continue to process the URB socket buffer so that 167 * synchronisation of the Ethernet frame Data header 168 * word is maintained. 169 */ 170 rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size); 171 172 rx->remaining = size; 173 } 174 175 if (rx->remaining > skb->len - offset) { 176 copy_length = skb->len - offset; 177 rx->remaining -= copy_length; 178 } else { 179 copy_length = rx->remaining; 180 rx->remaining = 0; 181 } 182 183 if (rx->ax_skb) { 184 skb_put_data(rx->ax_skb, skb->data + offset, 185 copy_length); 186 if (!rx->remaining) { 187 usbnet_skb_return(dev, rx->ax_skb); 188 rx->ax_skb = NULL; 189 } 190 } 191 192 offset += (copy_length + 1) & 0xfffe; 193 } 194 195 if (skb->len != offset) { 196 netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n", 197 skb->len, offset); 198 reset_asix_rx_fixup_info(rx); 199 return 0; 200 } 201 202 return 1; 203 } 204 205 int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb) 206 { 207 struct asix_common_private *dp = dev->driver_priv; 208 struct asix_rx_fixup_info *rx = &dp->rx_fixup_info; 209 210 return asix_rx_fixup_internal(dev, skb, rx); 211 } 212 213 void asix_rx_fixup_common_free(struct asix_common_private *dp) 214 { 215 struct asix_rx_fixup_info *rx; 216 217 if (!dp) 218 return; 219 220 rx = &dp->rx_fixup_info; 221 222 if (rx->ax_skb) { 223 kfree_skb(rx->ax_skb); 224 rx->ax_skb = NULL; 225 } 226 } 227 228 struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb, 229 gfp_t flags) 230 { 231 int padlen; 232 int headroom = skb_headroom(skb); 233 int tailroom = skb_tailroom(skb); 234 u32 packet_len; 235 u32 padbytes = 0xffff0000; 236 237 padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4; 238 239 /* We need to push 4 bytes in front of frame (packet_len) 240 * and maybe add 4 bytes after the end (if padlen is 4) 241 * 242 * Avoid skb_copy_expand() expensive call, using following rules : 243 * - We are allowed to push 4 bytes in headroom if skb_header_cloned() 244 * is false (and if we have 4 bytes of headroom) 245 * - We are allowed to put 4 bytes at tail if skb_cloned() 246 * is false (and if we have 4 bytes of tailroom) 247 * 248 * TCP packets for example are cloned, but __skb_header_release() 249 * was called in tcp stack, allowing us to use headroom for our needs. 250 */ 251 if (!skb_header_cloned(skb) && 252 !(padlen && skb_cloned(skb)) && 253 headroom + tailroom >= 4 + padlen) { 254 /* following should not happen, but better be safe */ 255 if (headroom < 4 || 256 tailroom < padlen) { 257 skb->data = memmove(skb->head + 4, skb->data, skb->len); 258 skb_set_tail_pointer(skb, skb->len); 259 } 260 } else { 261 struct sk_buff *skb2; 262 263 skb2 = skb_copy_expand(skb, 4, padlen, flags); 264 dev_kfree_skb_any(skb); 265 skb = skb2; 266 if (!skb) 267 return NULL; 268 } 269 270 packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len; 271 skb_push(skb, 4); 272 cpu_to_le32s(&packet_len); 273 skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len)); 274 275 if (padlen) { 276 cpu_to_le32s(&padbytes); 277 memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes)); 278 skb_put(skb, sizeof(padbytes)); 279 } 280 281 usbnet_set_skb_tx_stats(skb, 1, 0); 282 return skb; 283 } 284 285 int asix_set_sw_mii(struct usbnet *dev, int in_pm) 286 { 287 int ret; 288 ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL, in_pm); 289 290 if (ret < 0) 291 netdev_err(dev->net, "Failed to enable software MII access\n"); 292 return ret; 293 } 294 295 int asix_set_hw_mii(struct usbnet *dev, int in_pm) 296 { 297 int ret; 298 ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL, in_pm); 299 if (ret < 0) 300 netdev_err(dev->net, "Failed to enable hardware MII access\n"); 301 return ret; 302 } 303 304 int asix_read_phy_addr(struct usbnet *dev, int internal) 305 { 306 int offset = (internal ? 1 : 0); 307 u8 buf[2]; 308 int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf, 0); 309 310 netdev_dbg(dev->net, "asix_get_phy_addr()\n"); 311 312 if (ret < 0) { 313 netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret); 314 goto out; 315 } 316 netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n", 317 *((__le16 *)buf)); 318 ret = buf[offset]; 319 320 out: 321 return ret; 322 } 323 324 int asix_get_phy_addr(struct usbnet *dev) 325 { 326 /* return the address of the internal phy */ 327 return asix_read_phy_addr(dev, 1); 328 } 329 330 331 int asix_sw_reset(struct usbnet *dev, u8 flags, int in_pm) 332 { 333 int ret; 334 335 ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL, in_pm); 336 if (ret < 0) 337 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret); 338 339 return ret; 340 } 341 342 u16 asix_read_rx_ctl(struct usbnet *dev, int in_pm) 343 { 344 __le16 v; 345 int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v, in_pm); 346 347 if (ret < 0) { 348 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret); 349 goto out; 350 } 351 ret = le16_to_cpu(v); 352 out: 353 return ret; 354 } 355 356 int asix_write_rx_ctl(struct usbnet *dev, u16 mode, int in_pm) 357 { 358 int ret; 359 360 netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode); 361 ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL, in_pm); 362 if (ret < 0) 363 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n", 364 mode, ret); 365 366 return ret; 367 } 368 369 u16 asix_read_medium_status(struct usbnet *dev, int in_pm) 370 { 371 __le16 v; 372 int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 373 0, 0, 2, &v, in_pm); 374 375 if (ret < 0) { 376 netdev_err(dev->net, "Error reading Medium Status register: %02x\n", 377 ret); 378 return ret; /* TODO: callers not checking for error ret */ 379 } 380 381 return le16_to_cpu(v); 382 383 } 384 385 int asix_write_medium_mode(struct usbnet *dev, u16 mode, int in_pm) 386 { 387 int ret; 388 389 netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode); 390 ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, 391 mode, 0, 0, NULL, in_pm); 392 if (ret < 0) 393 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n", 394 mode, ret); 395 396 return ret; 397 } 398 399 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm) 400 { 401 int ret; 402 403 netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value); 404 ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL, in_pm); 405 if (ret < 0) 406 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n", 407 value, ret); 408 409 if (sleep) 410 msleep(sleep); 411 412 return ret; 413 } 414 415 /* 416 * AX88772 & AX88178 have a 16-bit RX_CTL value 417 */ 418 void asix_set_multicast(struct net_device *net) 419 { 420 struct usbnet *dev = netdev_priv(net); 421 struct asix_data *data = (struct asix_data *)&dev->data; 422 u16 rx_ctl = AX_DEFAULT_RX_CTL; 423 424 if (net->flags & IFF_PROMISC) { 425 rx_ctl |= AX_RX_CTL_PRO; 426 } else if (net->flags & IFF_ALLMULTI || 427 netdev_mc_count(net) > AX_MAX_MCAST) { 428 rx_ctl |= AX_RX_CTL_AMALL; 429 } else if (netdev_mc_empty(net)) { 430 /* just broadcast and directed */ 431 } else { 432 /* We use the 20 byte dev->data 433 * for our 8 byte filter buffer 434 * to avoid allocating memory that 435 * is tricky to free later */ 436 struct netdev_hw_addr *ha; 437 u32 crc_bits; 438 439 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE); 440 441 /* Build the multicast hash filter. */ 442 netdev_for_each_mc_addr(ha, net) { 443 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26; 444 data->multi_filter[crc_bits >> 3] |= 445 1 << (crc_bits & 7); 446 } 447 448 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0, 449 AX_MCAST_FILTER_SIZE, data->multi_filter); 450 451 rx_ctl |= AX_RX_CTL_AM; 452 } 453 454 asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL); 455 } 456 457 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc) 458 { 459 struct usbnet *dev = netdev_priv(netdev); 460 __le16 res; 461 u8 smsr; 462 int i = 0; 463 int ret; 464 465 mutex_lock(&dev->phy_mutex); 466 do { 467 ret = asix_set_sw_mii(dev, 0); 468 if (ret == -ENODEV || ret == -ETIMEDOUT) 469 break; 470 usleep_range(1000, 1100); 471 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 472 0, 0, 1, &smsr, 0); 473 } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV)); 474 if (ret == -ENODEV || ret == -ETIMEDOUT) { 475 mutex_unlock(&dev->phy_mutex); 476 return ret; 477 } 478 479 asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, 480 (__u16)loc, 2, &res, 0); 481 asix_set_hw_mii(dev, 0); 482 mutex_unlock(&dev->phy_mutex); 483 484 netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 485 phy_id, loc, le16_to_cpu(res)); 486 487 return le16_to_cpu(res); 488 } 489 490 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val) 491 { 492 struct usbnet *dev = netdev_priv(netdev); 493 __le16 res = cpu_to_le16(val); 494 u8 smsr; 495 int i = 0; 496 int ret; 497 498 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 499 phy_id, loc, val); 500 501 mutex_lock(&dev->phy_mutex); 502 do { 503 ret = asix_set_sw_mii(dev, 0); 504 if (ret == -ENODEV) 505 break; 506 usleep_range(1000, 1100); 507 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 508 0, 0, 1, &smsr, 0); 509 } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV)); 510 if (ret == -ENODEV) { 511 mutex_unlock(&dev->phy_mutex); 512 return; 513 } 514 515 asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, 516 (__u16)loc, 2, &res, 0); 517 asix_set_hw_mii(dev, 0); 518 mutex_unlock(&dev->phy_mutex); 519 } 520 521 int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc) 522 { 523 struct usbnet *dev = netdev_priv(netdev); 524 __le16 res; 525 u8 smsr; 526 int i = 0; 527 int ret; 528 529 mutex_lock(&dev->phy_mutex); 530 do { 531 ret = asix_set_sw_mii(dev, 1); 532 if (ret == -ENODEV || ret == -ETIMEDOUT) 533 break; 534 usleep_range(1000, 1100); 535 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 536 0, 0, 1, &smsr, 1); 537 } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV)); 538 if (ret == -ENODEV || ret == -ETIMEDOUT) { 539 mutex_unlock(&dev->phy_mutex); 540 return ret; 541 } 542 543 asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, 544 (__u16)loc, 2, &res, 1); 545 asix_set_hw_mii(dev, 1); 546 mutex_unlock(&dev->phy_mutex); 547 548 netdev_dbg(dev->net, "asix_mdio_read_nopm() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", 549 phy_id, loc, le16_to_cpu(res)); 550 551 return le16_to_cpu(res); 552 } 553 554 void 555 asix_mdio_write_nopm(struct net_device *netdev, int phy_id, int loc, int val) 556 { 557 struct usbnet *dev = netdev_priv(netdev); 558 __le16 res = cpu_to_le16(val); 559 u8 smsr; 560 int i = 0; 561 int ret; 562 563 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", 564 phy_id, loc, val); 565 566 mutex_lock(&dev->phy_mutex); 567 do { 568 ret = asix_set_sw_mii(dev, 1); 569 if (ret == -ENODEV) 570 break; 571 usleep_range(1000, 1100); 572 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 573 0, 0, 1, &smsr, 1); 574 } while (!(smsr & AX_HOST_EN) && (i++ < 30) && (ret != -ENODEV)); 575 if (ret == -ENODEV) { 576 mutex_unlock(&dev->phy_mutex); 577 return; 578 } 579 580 asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, 581 (__u16)loc, 2, &res, 1); 582 asix_set_hw_mii(dev, 1); 583 mutex_unlock(&dev->phy_mutex); 584 } 585 586 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 587 { 588 struct usbnet *dev = netdev_priv(net); 589 u8 opt; 590 591 if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 592 0, 0, 1, &opt, 0) < 0) { 593 wolinfo->supported = 0; 594 wolinfo->wolopts = 0; 595 return; 596 } 597 wolinfo->supported = WAKE_PHY | WAKE_MAGIC; 598 wolinfo->wolopts = 0; 599 if (opt & AX_MONITOR_LINK) 600 wolinfo->wolopts |= WAKE_PHY; 601 if (opt & AX_MONITOR_MAGIC) 602 wolinfo->wolopts |= WAKE_MAGIC; 603 } 604 605 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo) 606 { 607 struct usbnet *dev = netdev_priv(net); 608 u8 opt = 0; 609 610 if (wolinfo->wolopts & WAKE_PHY) 611 opt |= AX_MONITOR_LINK; 612 if (wolinfo->wolopts & WAKE_MAGIC) 613 opt |= AX_MONITOR_MAGIC; 614 615 if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE, 616 opt, 0, 0, NULL, 0) < 0) 617 return -EINVAL; 618 619 return 0; 620 } 621 622 int asix_get_eeprom_len(struct net_device *net) 623 { 624 return AX_EEPROM_LEN; 625 } 626 627 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 628 u8 *data) 629 { 630 struct usbnet *dev = netdev_priv(net); 631 u16 *eeprom_buff; 632 int first_word, last_word; 633 int i; 634 635 if (eeprom->len == 0) 636 return -EINVAL; 637 638 eeprom->magic = AX_EEPROM_MAGIC; 639 640 first_word = eeprom->offset >> 1; 641 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 642 643 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 644 GFP_KERNEL); 645 if (!eeprom_buff) 646 return -ENOMEM; 647 648 /* ax8817x returns 2 bytes from eeprom on read */ 649 for (i = first_word; i <= last_word; i++) { 650 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2, 651 &eeprom_buff[i - first_word], 0) < 0) { 652 kfree(eeprom_buff); 653 return -EIO; 654 } 655 } 656 657 memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len); 658 kfree(eeprom_buff); 659 return 0; 660 } 661 662 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, 663 u8 *data) 664 { 665 struct usbnet *dev = netdev_priv(net); 666 u16 *eeprom_buff; 667 int first_word, last_word; 668 int i; 669 int ret; 670 671 netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n", 672 eeprom->len, eeprom->offset, eeprom->magic); 673 674 if (eeprom->len == 0) 675 return -EINVAL; 676 677 if (eeprom->magic != AX_EEPROM_MAGIC) 678 return -EINVAL; 679 680 first_word = eeprom->offset >> 1; 681 last_word = (eeprom->offset + eeprom->len - 1) >> 1; 682 683 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16), 684 GFP_KERNEL); 685 if (!eeprom_buff) 686 return -ENOMEM; 687 688 /* align data to 16 bit boundaries, read the missing data from 689 the EEPROM */ 690 if (eeprom->offset & 1) { 691 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2, 692 &eeprom_buff[0], 0); 693 if (ret < 0) { 694 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word); 695 goto free; 696 } 697 } 698 699 if ((eeprom->offset + eeprom->len) & 1) { 700 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2, 701 &eeprom_buff[last_word - first_word], 0); 702 if (ret < 0) { 703 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word); 704 goto free; 705 } 706 } 707 708 memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len); 709 710 /* write data to EEPROM */ 711 ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL, 0); 712 if (ret < 0) { 713 netdev_err(net, "Failed to enable EEPROM write\n"); 714 goto free; 715 } 716 msleep(20); 717 718 for (i = first_word; i <= last_word; i++) { 719 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n", 720 i, eeprom_buff[i - first_word]); 721 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i, 722 eeprom_buff[i - first_word], 0, NULL, 0); 723 if (ret < 0) { 724 netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n", 725 i); 726 goto free; 727 } 728 msleep(20); 729 } 730 731 ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL, 0); 732 if (ret < 0) { 733 netdev_err(net, "Failed to disable EEPROM write\n"); 734 goto free; 735 } 736 737 ret = 0; 738 free: 739 kfree(eeprom_buff); 740 return ret; 741 } 742 743 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) 744 { 745 /* Inherit standard device info */ 746 usbnet_get_drvinfo(net, info); 747 strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver)); 748 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 749 } 750 751 int asix_set_mac_address(struct net_device *net, void *p) 752 { 753 struct usbnet *dev = netdev_priv(net); 754 struct asix_data *data = (struct asix_data *)&dev->data; 755 struct sockaddr *addr = p; 756 757 if (netif_running(net)) 758 return -EBUSY; 759 if (!is_valid_ether_addr(addr->sa_data)) 760 return -EADDRNOTAVAIL; 761 762 memcpy(net->dev_addr, addr->sa_data, ETH_ALEN); 763 764 /* We use the 20 byte dev->data 765 * for our 6 byte mac buffer 766 * to avoid allocating memory that 767 * is tricky to free later */ 768 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN); 769 asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN, 770 data->mac_addr); 771 772 return 0; 773 } 774