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