1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /*************************************************************************** 3 * 4 * Copyright (C) 2007-2008 SMSC 5 * 6 *****************************************************************************/ 7 8 #include <linux/module.h> 9 #include <linux/kmod.h> 10 #include <linux/netdevice.h> 11 #include <linux/etherdevice.h> 12 #include <linux/ethtool.h> 13 #include <linux/mii.h> 14 #include <linux/usb.h> 15 #include <linux/bitrev.h> 16 #include <linux/crc16.h> 17 #include <linux/crc32.h> 18 #include <linux/usb/usbnet.h> 19 #include <linux/slab.h> 20 #include <linux/of_net.h> 21 #include <linux/mdio.h> 22 #include <linux/phy.h> 23 #include "smsc95xx.h" 24 25 #define SMSC_CHIPNAME "smsc95xx" 26 #define SMSC_DRIVER_VERSION "2.0.0" 27 #define HS_USB_PKT_SIZE (512) 28 #define FS_USB_PKT_SIZE (64) 29 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) 30 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) 31 #define DEFAULT_BULK_IN_DELAY (0x00002000) 32 #define MAX_SINGLE_PACKET_SIZE (2048) 33 #define LAN95XX_EEPROM_MAGIC (0x9500) 34 #define EEPROM_MAC_OFFSET (0x01) 35 #define DEFAULT_TX_CSUM_ENABLE (true) 36 #define DEFAULT_RX_CSUM_ENABLE (true) 37 #define SMSC95XX_INTERNAL_PHY_ID (1) 38 #define SMSC95XX_TX_OVERHEAD (8) 39 #define SMSC95XX_TX_OVERHEAD_CSUM (12) 40 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ 41 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) 42 43 #define FEATURE_8_WAKEUP_FILTERS (0x01) 44 #define FEATURE_PHY_NLP_CROSSOVER (0x02) 45 #define FEATURE_REMOTE_WAKEUP (0x04) 46 47 #define SUSPEND_SUSPEND0 (0x01) 48 #define SUSPEND_SUSPEND1 (0x02) 49 #define SUSPEND_SUSPEND2 (0x04) 50 #define SUSPEND_SUSPEND3 (0x08) 51 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ 52 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) 53 54 struct smsc95xx_priv { 55 u32 mac_cr; 56 u32 hash_hi; 57 u32 hash_lo; 58 u32 wolopts; 59 spinlock_t mac_cr_lock; 60 u8 features; 61 u8 suspend_flags; 62 struct mii_bus *mdiobus; 63 struct phy_device *phydev; 64 }; 65 66 static bool turbo_mode = true; 67 module_param(turbo_mode, bool, 0644); 68 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 69 70 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index, 71 u32 *data, int in_pm) 72 { 73 u32 buf; 74 int ret; 75 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 76 77 BUG_ON(!dev); 78 79 if (!in_pm) 80 fn = usbnet_read_cmd; 81 else 82 fn = usbnet_read_cmd_nopm; 83 84 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 85 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 86 0, index, &buf, 4); 87 if (unlikely(ret < 0)) { 88 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 89 index, ret); 90 return ret; 91 } 92 93 le32_to_cpus(&buf); 94 *data = buf; 95 96 return ret; 97 } 98 99 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index, 100 u32 data, int in_pm) 101 { 102 u32 buf; 103 int ret; 104 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 105 106 BUG_ON(!dev); 107 108 if (!in_pm) 109 fn = usbnet_write_cmd; 110 else 111 fn = usbnet_write_cmd_nopm; 112 113 buf = data; 114 cpu_to_le32s(&buf); 115 116 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 117 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 118 0, index, &buf, 4); 119 if (unlikely(ret < 0)) 120 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 121 index, ret); 122 123 return ret; 124 } 125 126 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index, 127 u32 *data) 128 { 129 return __smsc95xx_read_reg(dev, index, data, 1); 130 } 131 132 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index, 133 u32 data) 134 { 135 return __smsc95xx_write_reg(dev, index, data, 1); 136 } 137 138 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 139 u32 *data) 140 { 141 return __smsc95xx_read_reg(dev, index, data, 0); 142 } 143 144 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 145 u32 data) 146 { 147 return __smsc95xx_write_reg(dev, index, data, 0); 148 } 149 150 /* Loop until the read is completed with timeout 151 * called with phy_mutex held */ 152 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev, 153 int in_pm) 154 { 155 unsigned long start_time = jiffies; 156 u32 val; 157 int ret; 158 159 do { 160 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm); 161 if (ret < 0) { 162 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 163 return ret; 164 } 165 166 if (!(val & MII_BUSY_)) 167 return 0; 168 } while (!time_after(jiffies, start_time + HZ)); 169 170 return -EIO; 171 } 172 173 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 174 { 175 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 176 } 177 178 static int __smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx, 179 int in_pm) 180 { 181 u32 val, addr; 182 int ret; 183 184 mutex_lock(&dev->phy_mutex); 185 186 /* confirm MII not busy */ 187 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 188 if (ret < 0) { 189 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 190 goto done; 191 } 192 193 /* set the address, index & direction (read from PHY) */ 194 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 195 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 196 if (ret < 0) { 197 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 198 goto done; 199 } 200 201 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 202 if (ret < 0) { 203 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 204 goto done; 205 } 206 207 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm); 208 if (ret < 0) { 209 netdev_warn(dev->net, "Error reading MII_DATA\n"); 210 goto done; 211 } 212 213 ret = (u16)(val & 0xFFFF); 214 215 done: 216 mutex_unlock(&dev->phy_mutex); 217 return ret; 218 } 219 220 static void __smsc95xx_mdio_write(struct usbnet *dev, int phy_id, 221 int idx, int regval, int in_pm) 222 { 223 u32 val, addr; 224 int ret; 225 226 mutex_lock(&dev->phy_mutex); 227 228 /* confirm MII not busy */ 229 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 230 if (ret < 0) { 231 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 232 goto done; 233 } 234 235 val = regval; 236 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm); 237 if (ret < 0) { 238 netdev_warn(dev->net, "Error writing MII_DATA\n"); 239 goto done; 240 } 241 242 /* set the address, index & direction (write to PHY) */ 243 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 244 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 245 if (ret < 0) { 246 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 247 goto done; 248 } 249 250 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 251 if (ret < 0) { 252 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 253 goto done; 254 } 255 256 done: 257 mutex_unlock(&dev->phy_mutex); 258 } 259 260 static int smsc95xx_mdio_read_nopm(struct usbnet *dev, int idx) 261 { 262 struct smsc95xx_priv *pdata = dev->driver_priv; 263 264 return __smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, idx, 1); 265 } 266 267 static void smsc95xx_mdio_write_nopm(struct usbnet *dev, int idx, int regval) 268 { 269 struct smsc95xx_priv *pdata = dev->driver_priv; 270 271 __smsc95xx_mdio_write(dev, pdata->phydev->mdio.addr, idx, regval, 1); 272 } 273 274 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 275 { 276 struct usbnet *dev = bus->priv; 277 278 return __smsc95xx_mdio_read(dev, phy_id, idx, 0); 279 } 280 281 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 282 u16 regval) 283 { 284 struct usbnet *dev = bus->priv; 285 286 __smsc95xx_mdio_write(dev, phy_id, idx, regval, 0); 287 return 0; 288 } 289 290 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 291 { 292 unsigned long start_time = jiffies; 293 u32 val; 294 int ret; 295 296 do { 297 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 298 if (ret < 0) { 299 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 300 return ret; 301 } 302 303 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 304 break; 305 udelay(40); 306 } while (!time_after(jiffies, start_time + HZ)); 307 308 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 309 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 310 return -EIO; 311 } 312 313 return 0; 314 } 315 316 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 317 { 318 unsigned long start_time = jiffies; 319 u32 val; 320 int ret; 321 322 do { 323 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 324 if (ret < 0) { 325 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 326 return ret; 327 } 328 329 if (!(val & E2P_CMD_BUSY_)) 330 return 0; 331 332 udelay(40); 333 } while (!time_after(jiffies, start_time + HZ)); 334 335 netdev_warn(dev->net, "EEPROM is busy\n"); 336 return -EIO; 337 } 338 339 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 340 u8 *data) 341 { 342 u32 val; 343 int i, ret; 344 345 BUG_ON(!dev); 346 BUG_ON(!data); 347 348 ret = smsc95xx_eeprom_confirm_not_busy(dev); 349 if (ret) 350 return ret; 351 352 for (i = 0; i < length; i++) { 353 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 354 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 355 if (ret < 0) { 356 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 357 return ret; 358 } 359 360 ret = smsc95xx_wait_eeprom(dev); 361 if (ret < 0) 362 return ret; 363 364 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 365 if (ret < 0) { 366 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 367 return ret; 368 } 369 370 data[i] = val & 0xFF; 371 offset++; 372 } 373 374 return 0; 375 } 376 377 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 378 u8 *data) 379 { 380 u32 val; 381 int i, ret; 382 383 BUG_ON(!dev); 384 BUG_ON(!data); 385 386 ret = smsc95xx_eeprom_confirm_not_busy(dev); 387 if (ret) 388 return ret; 389 390 /* Issue write/erase enable command */ 391 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 392 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 393 if (ret < 0) { 394 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 395 return ret; 396 } 397 398 ret = smsc95xx_wait_eeprom(dev); 399 if (ret < 0) 400 return ret; 401 402 for (i = 0; i < length; i++) { 403 404 /* Fill data register */ 405 val = data[i]; 406 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 407 if (ret < 0) { 408 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 409 return ret; 410 } 411 412 /* Send "write" command */ 413 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 414 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 415 if (ret < 0) { 416 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 417 return ret; 418 } 419 420 ret = smsc95xx_wait_eeprom(dev); 421 if (ret < 0) 422 return ret; 423 424 offset++; 425 } 426 427 return 0; 428 } 429 430 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 431 u32 data) 432 { 433 const u16 size = 4; 434 u32 buf; 435 int ret; 436 437 buf = data; 438 cpu_to_le32s(&buf); 439 440 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 441 USB_DIR_OUT | USB_TYPE_VENDOR | 442 USB_RECIP_DEVICE, 443 0, index, &buf, size); 444 if (ret < 0) 445 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 446 ret); 447 return ret; 448 } 449 450 /* returns hash bit number for given MAC address 451 * example: 452 * 01 00 5E 00 00 01 -> returns bit number 31 */ 453 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 454 { 455 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 456 } 457 458 static void smsc95xx_set_multicast(struct net_device *netdev) 459 { 460 struct usbnet *dev = netdev_priv(netdev); 461 struct smsc95xx_priv *pdata = dev->driver_priv; 462 unsigned long flags; 463 int ret; 464 465 pdata->hash_hi = 0; 466 pdata->hash_lo = 0; 467 468 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 469 470 if (dev->net->flags & IFF_PROMISC) { 471 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 472 pdata->mac_cr |= MAC_CR_PRMS_; 473 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 474 } else if (dev->net->flags & IFF_ALLMULTI) { 475 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 476 pdata->mac_cr |= MAC_CR_MCPAS_; 477 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 478 } else if (!netdev_mc_empty(dev->net)) { 479 struct netdev_hw_addr *ha; 480 481 pdata->mac_cr |= MAC_CR_HPFILT_; 482 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 483 484 netdev_for_each_mc_addr(ha, netdev) { 485 u32 bitnum = smsc95xx_hash(ha->addr); 486 u32 mask = 0x01 << (bitnum & 0x1F); 487 if (bitnum & 0x20) 488 pdata->hash_hi |= mask; 489 else 490 pdata->hash_lo |= mask; 491 } 492 493 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 494 pdata->hash_hi, pdata->hash_lo); 495 } else { 496 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 497 pdata->mac_cr &= 498 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 499 } 500 501 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 502 503 /* Initiate async writes, as we can't wait for completion here */ 504 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 505 if (ret < 0) 506 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 507 508 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 509 if (ret < 0) 510 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 511 512 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 513 if (ret < 0) 514 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 515 } 516 517 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 518 { 519 u32 flow = 0, afc_cfg; 520 struct smsc95xx_priv *pdata = dev->driver_priv; 521 bool tx_pause, rx_pause; 522 523 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 524 if (ret < 0) 525 return ret; 526 527 if (pdata->phydev->duplex == DUPLEX_FULL) { 528 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 529 530 if (rx_pause) 531 flow = 0xFFFF0002; 532 533 if (tx_pause) { 534 afc_cfg |= 0xF; 535 flow |= 0xFFFF0000; 536 } else { 537 afc_cfg &= ~0xF; 538 } 539 540 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 541 rx_pause ? "enabled" : "disabled", 542 tx_pause ? "enabled" : "disabled"); 543 } else { 544 netif_dbg(dev, link, dev->net, "half duplex\n"); 545 afc_cfg |= 0xF; 546 } 547 548 ret = smsc95xx_write_reg(dev, FLOW, flow); 549 if (ret < 0) 550 return ret; 551 552 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 553 } 554 555 static int smsc95xx_link_reset(struct usbnet *dev) 556 { 557 struct smsc95xx_priv *pdata = dev->driver_priv; 558 unsigned long flags; 559 int ret; 560 561 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 562 if (ret < 0) 563 return ret; 564 565 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 566 if (pdata->phydev->duplex != DUPLEX_FULL) { 567 pdata->mac_cr &= ~MAC_CR_FDPX_; 568 pdata->mac_cr |= MAC_CR_RCVOWN_; 569 } else { 570 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 571 pdata->mac_cr |= MAC_CR_FDPX_; 572 } 573 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 574 575 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 576 if (ret < 0) 577 return ret; 578 579 ret = smsc95xx_phy_update_flowcontrol(dev); 580 if (ret < 0) 581 netdev_warn(dev->net, "Error updating PHY flow control\n"); 582 583 return ret; 584 } 585 586 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 587 { 588 u32 intdata; 589 590 if (urb->actual_length != 4) { 591 netdev_warn(dev->net, "unexpected urb length %d\n", 592 urb->actual_length); 593 return; 594 } 595 596 intdata = get_unaligned_le32(urb->transfer_buffer); 597 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 598 599 if (intdata & INT_ENP_PHY_INT_) 600 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 601 else 602 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 603 intdata); 604 } 605 606 /* Enable or disable Tx & Rx checksum offload engines */ 607 static int smsc95xx_set_features(struct net_device *netdev, 608 netdev_features_t features) 609 { 610 struct usbnet *dev = netdev_priv(netdev); 611 u32 read_buf; 612 int ret; 613 614 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 615 if (ret < 0) 616 return ret; 617 618 if (features & NETIF_F_IP_CSUM) 619 read_buf |= Tx_COE_EN_; 620 else 621 read_buf &= ~Tx_COE_EN_; 622 623 if (features & NETIF_F_RXCSUM) 624 read_buf |= Rx_COE_EN_; 625 else 626 read_buf &= ~Rx_COE_EN_; 627 628 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 629 if (ret < 0) 630 return ret; 631 632 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 633 return 0; 634 } 635 636 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 637 { 638 return MAX_EEPROM_SIZE; 639 } 640 641 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 642 struct ethtool_eeprom *ee, u8 *data) 643 { 644 struct usbnet *dev = netdev_priv(netdev); 645 646 ee->magic = LAN95XX_EEPROM_MAGIC; 647 648 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 649 } 650 651 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 652 struct ethtool_eeprom *ee, u8 *data) 653 { 654 struct usbnet *dev = netdev_priv(netdev); 655 656 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 657 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 658 ee->magic); 659 return -EINVAL; 660 } 661 662 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 663 } 664 665 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 666 { 667 /* all smsc95xx registers */ 668 return COE_CR - ID_REV + sizeof(u32); 669 } 670 671 static void 672 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 673 void *buf) 674 { 675 struct usbnet *dev = netdev_priv(netdev); 676 unsigned int i, j; 677 int retval; 678 u32 *data = buf; 679 680 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 681 if (retval < 0) { 682 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 683 return; 684 } 685 686 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 687 retval = smsc95xx_read_reg(dev, i, &data[j]); 688 if (retval < 0) { 689 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 690 return; 691 } 692 } 693 } 694 695 static void smsc95xx_ethtool_get_wol(struct net_device *net, 696 struct ethtool_wolinfo *wolinfo) 697 { 698 struct usbnet *dev = netdev_priv(net); 699 struct smsc95xx_priv *pdata = dev->driver_priv; 700 701 wolinfo->supported = SUPPORTED_WAKE; 702 wolinfo->wolopts = pdata->wolopts; 703 } 704 705 static int smsc95xx_ethtool_set_wol(struct net_device *net, 706 struct ethtool_wolinfo *wolinfo) 707 { 708 struct usbnet *dev = netdev_priv(net); 709 struct smsc95xx_priv *pdata = dev->driver_priv; 710 int ret; 711 712 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 713 return -EINVAL; 714 715 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 716 717 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 718 if (ret < 0) 719 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 720 721 return ret; 722 } 723 724 static u32 smsc95xx_get_link(struct net_device *net) 725 { 726 phy_read_status(net->phydev); 727 return net->phydev->link; 728 } 729 730 static const struct ethtool_ops smsc95xx_ethtool_ops = { 731 .get_link = smsc95xx_get_link, 732 .nway_reset = phy_ethtool_nway_reset, 733 .get_drvinfo = usbnet_get_drvinfo, 734 .get_msglevel = usbnet_get_msglevel, 735 .set_msglevel = usbnet_set_msglevel, 736 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 737 .get_eeprom = smsc95xx_ethtool_get_eeprom, 738 .set_eeprom = smsc95xx_ethtool_set_eeprom, 739 .get_regs_len = smsc95xx_ethtool_getregslen, 740 .get_regs = smsc95xx_ethtool_getregs, 741 .get_wol = smsc95xx_ethtool_get_wol, 742 .set_wol = smsc95xx_ethtool_set_wol, 743 .get_link_ksettings = phy_ethtool_get_link_ksettings, 744 .set_link_ksettings = phy_ethtool_set_link_ksettings, 745 .get_ts_info = ethtool_op_get_ts_info, 746 }; 747 748 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 749 { 750 if (!netif_running(netdev)) 751 return -EINVAL; 752 753 return phy_mii_ioctl(netdev->phydev, rq, cmd); 754 } 755 756 static void smsc95xx_init_mac_address(struct usbnet *dev) 757 { 758 /* maybe the boot loader passed the MAC address in devicetree */ 759 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 760 if (is_valid_ether_addr(dev->net->dev_addr)) { 761 /* device tree values are valid so use them */ 762 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 763 return; 764 } 765 } 766 767 /* try reading mac address from EEPROM */ 768 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 769 dev->net->dev_addr) == 0) { 770 if (is_valid_ether_addr(dev->net->dev_addr)) { 771 /* eeprom values are valid so use them */ 772 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 773 return; 774 } 775 } 776 777 /* no useful static MAC address found. generate a random one */ 778 eth_hw_addr_random(dev->net); 779 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 780 } 781 782 static int smsc95xx_set_mac_address(struct usbnet *dev) 783 { 784 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 785 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 786 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 787 int ret; 788 789 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 790 if (ret < 0) 791 return ret; 792 793 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 794 } 795 796 /* starts the TX path */ 797 static int smsc95xx_start_tx_path(struct usbnet *dev) 798 { 799 struct smsc95xx_priv *pdata = dev->driver_priv; 800 unsigned long flags; 801 int ret; 802 803 /* Enable Tx at MAC */ 804 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 805 pdata->mac_cr |= MAC_CR_TXEN_; 806 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 807 808 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 809 if (ret < 0) 810 return ret; 811 812 /* Enable Tx at SCSRs */ 813 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 814 } 815 816 /* Starts the Receive path */ 817 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 818 { 819 struct smsc95xx_priv *pdata = dev->driver_priv; 820 unsigned long flags; 821 822 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 823 pdata->mac_cr |= MAC_CR_RXEN_; 824 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 825 826 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 827 } 828 829 static int smsc95xx_reset(struct usbnet *dev) 830 { 831 struct smsc95xx_priv *pdata = dev->driver_priv; 832 u32 read_buf, write_buf, burst_cap; 833 int ret = 0, timeout; 834 835 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 836 837 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 838 if (ret < 0) 839 return ret; 840 841 timeout = 0; 842 do { 843 msleep(10); 844 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 845 if (ret < 0) 846 return ret; 847 timeout++; 848 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 849 850 if (timeout >= 100) { 851 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 852 return ret; 853 } 854 855 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 856 if (ret < 0) 857 return ret; 858 859 timeout = 0; 860 do { 861 msleep(10); 862 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 863 if (ret < 0) 864 return ret; 865 timeout++; 866 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 867 868 if (timeout >= 100) { 869 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 870 return ret; 871 } 872 873 ret = smsc95xx_set_mac_address(dev); 874 if (ret < 0) 875 return ret; 876 877 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 878 dev->net->dev_addr); 879 880 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 881 if (ret < 0) 882 return ret; 883 884 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 885 read_buf); 886 887 read_buf |= HW_CFG_BIR_; 888 889 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 890 if (ret < 0) 891 return ret; 892 893 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 894 if (ret < 0) 895 return ret; 896 897 netif_dbg(dev, ifup, dev->net, 898 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 899 read_buf); 900 901 if (!turbo_mode) { 902 burst_cap = 0; 903 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 904 } else if (dev->udev->speed == USB_SPEED_HIGH) { 905 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 906 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 907 } else { 908 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 909 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 910 } 911 912 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 913 (ulong)dev->rx_urb_size); 914 915 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 916 if (ret < 0) 917 return ret; 918 919 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 920 if (ret < 0) 921 return ret; 922 923 netif_dbg(dev, ifup, dev->net, 924 "Read Value from BURST_CAP after writing: 0x%08x\n", 925 read_buf); 926 927 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 928 if (ret < 0) 929 return ret; 930 931 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 932 if (ret < 0) 933 return ret; 934 935 netif_dbg(dev, ifup, dev->net, 936 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 937 read_buf); 938 939 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 940 if (ret < 0) 941 return ret; 942 943 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 944 read_buf); 945 946 if (turbo_mode) 947 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 948 949 read_buf &= ~HW_CFG_RXDOFF_; 950 951 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 952 read_buf |= NET_IP_ALIGN << 9; 953 954 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 955 if (ret < 0) 956 return ret; 957 958 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 959 if (ret < 0) 960 return ret; 961 962 netif_dbg(dev, ifup, dev->net, 963 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 964 965 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 966 if (ret < 0) 967 return ret; 968 969 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 970 if (ret < 0) 971 return ret; 972 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 973 974 /* Configure GPIO pins as LED outputs */ 975 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 976 LED_GPIO_CFG_FDX_LED; 977 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 978 if (ret < 0) 979 return ret; 980 981 /* Init Tx */ 982 ret = smsc95xx_write_reg(dev, FLOW, 0); 983 if (ret < 0) 984 return ret; 985 986 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 987 if (ret < 0) 988 return ret; 989 990 /* Don't need mac_cr_lock during initialisation */ 991 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 992 if (ret < 0) 993 return ret; 994 995 /* Init Rx */ 996 /* Set Vlan */ 997 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 998 if (ret < 0) 999 return ret; 1000 1001 /* Enable or disable checksum offload engines */ 1002 ret = smsc95xx_set_features(dev->net, dev->net->features); 1003 if (ret < 0) { 1004 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1005 return ret; 1006 } 1007 1008 smsc95xx_set_multicast(dev->net); 1009 1010 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1011 if (ret < 0) 1012 return ret; 1013 1014 /* enable PHY interrupts */ 1015 read_buf |= INT_EP_CTL_PHY_INT_; 1016 1017 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1018 if (ret < 0) 1019 return ret; 1020 1021 ret = smsc95xx_start_tx_path(dev); 1022 if (ret < 0) { 1023 netdev_warn(dev->net, "Failed to start TX path\n"); 1024 return ret; 1025 } 1026 1027 ret = smsc95xx_start_rx_path(dev, 0); 1028 if (ret < 0) { 1029 netdev_warn(dev->net, "Failed to start RX path\n"); 1030 return ret; 1031 } 1032 1033 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1034 return 0; 1035 } 1036 1037 static const struct net_device_ops smsc95xx_netdev_ops = { 1038 .ndo_open = usbnet_open, 1039 .ndo_stop = usbnet_stop, 1040 .ndo_start_xmit = usbnet_start_xmit, 1041 .ndo_tx_timeout = usbnet_tx_timeout, 1042 .ndo_change_mtu = usbnet_change_mtu, 1043 .ndo_get_stats64 = dev_get_tstats64, 1044 .ndo_set_mac_address = eth_mac_addr, 1045 .ndo_validate_addr = eth_validate_addr, 1046 .ndo_eth_ioctl = smsc95xx_ioctl, 1047 .ndo_set_rx_mode = smsc95xx_set_multicast, 1048 .ndo_set_features = smsc95xx_set_features, 1049 }; 1050 1051 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1052 { 1053 struct smsc95xx_priv *pdata; 1054 bool is_internal_phy; 1055 u32 val; 1056 int ret; 1057 1058 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1059 1060 ret = usbnet_get_endpoints(dev, intf); 1061 if (ret < 0) { 1062 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1063 return ret; 1064 } 1065 1066 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1067 if (!pdata) 1068 return -ENOMEM; 1069 1070 dev->driver_priv = pdata; 1071 1072 spin_lock_init(&pdata->mac_cr_lock); 1073 1074 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1075 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1076 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1077 * it is transmitted as all ones. The zero transmitted checksum means 1078 * transmitter generated no checksum. Hence, enable csum offload only 1079 * for ipv4 packets. 1080 */ 1081 if (DEFAULT_TX_CSUM_ENABLE) 1082 dev->net->features |= NETIF_F_IP_CSUM; 1083 if (DEFAULT_RX_CSUM_ENABLE) 1084 dev->net->features |= NETIF_F_RXCSUM; 1085 1086 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1087 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1088 1089 smsc95xx_init_mac_address(dev); 1090 1091 /* Init all registers */ 1092 ret = smsc95xx_reset(dev); 1093 if (ret) 1094 goto free_pdata; 1095 1096 pdata->mdiobus = mdiobus_alloc(); 1097 if (!pdata->mdiobus) { 1098 ret = -ENOMEM; 1099 goto free_pdata; 1100 } 1101 1102 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1103 if (ret < 0) 1104 goto free_mdio; 1105 1106 is_internal_phy = !(val & HW_CFG_PSEL_); 1107 if (is_internal_phy) 1108 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1109 1110 pdata->mdiobus->priv = dev; 1111 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1112 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1113 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1114 pdata->mdiobus->parent = &dev->udev->dev; 1115 1116 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1117 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1118 1119 ret = mdiobus_register(pdata->mdiobus); 1120 if (ret) { 1121 netdev_err(dev->net, "Could not register MDIO bus\n"); 1122 goto free_mdio; 1123 } 1124 1125 pdata->phydev = phy_find_first(pdata->mdiobus); 1126 if (!pdata->phydev) { 1127 netdev_err(dev->net, "no PHY found\n"); 1128 ret = -ENODEV; 1129 goto unregister_mdio; 1130 } 1131 1132 pdata->phydev->is_internal = is_internal_phy; 1133 1134 /* detect device revision as different features may be available */ 1135 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1136 if (ret < 0) 1137 goto unregister_mdio; 1138 1139 val >>= 16; 1140 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1141 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1142 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1143 FEATURE_PHY_NLP_CROSSOVER | 1144 FEATURE_REMOTE_WAKEUP); 1145 else if (val == ID_REV_CHIP_ID_9512_) 1146 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1147 1148 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1149 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1150 dev->net->flags |= IFF_MULTICAST; 1151 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1152 dev->net->min_mtu = ETH_MIN_MTU; 1153 dev->net->max_mtu = ETH_DATA_LEN; 1154 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1155 return 0; 1156 1157 unregister_mdio: 1158 mdiobus_unregister(pdata->mdiobus); 1159 1160 free_mdio: 1161 mdiobus_free(pdata->mdiobus); 1162 1163 free_pdata: 1164 kfree(pdata); 1165 return ret; 1166 } 1167 1168 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1169 { 1170 struct smsc95xx_priv *pdata = dev->driver_priv; 1171 1172 mdiobus_unregister(pdata->mdiobus); 1173 mdiobus_free(pdata->mdiobus); 1174 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1175 kfree(pdata); 1176 } 1177 1178 static void smsc95xx_handle_link_change(struct net_device *net) 1179 { 1180 struct usbnet *dev = netdev_priv(net); 1181 1182 phy_print_status(net->phydev); 1183 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1184 } 1185 1186 static int smsc95xx_start_phy(struct usbnet *dev) 1187 { 1188 struct smsc95xx_priv *pdata = dev->driver_priv; 1189 struct net_device *net = dev->net; 1190 int ret; 1191 1192 ret = smsc95xx_reset(dev); 1193 if (ret < 0) 1194 return ret; 1195 1196 ret = phy_connect_direct(net, pdata->phydev, 1197 &smsc95xx_handle_link_change, 1198 PHY_INTERFACE_MODE_MII); 1199 if (ret) { 1200 netdev_err(net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1201 return ret; 1202 } 1203 1204 phy_attached_info(net->phydev); 1205 phy_start(net->phydev); 1206 return 0; 1207 } 1208 1209 static int smsc95xx_disconnect_phy(struct usbnet *dev) 1210 { 1211 phy_stop(dev->net->phydev); 1212 phy_disconnect(dev->net->phydev); 1213 return 0; 1214 } 1215 1216 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1217 { 1218 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1219 return crc << ((filter % 2) * 16); 1220 } 1221 1222 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1223 { 1224 int ret; 1225 1226 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1227 1228 /* read to clear */ 1229 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_SRC); 1230 if (ret < 0) 1231 return ret; 1232 1233 /* enable interrupt source */ 1234 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_MASK); 1235 if (ret < 0) 1236 return ret; 1237 1238 ret |= mask; 1239 1240 smsc95xx_mdio_write_nopm(dev, PHY_INT_MASK, ret); 1241 1242 return 0; 1243 } 1244 1245 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1246 { 1247 int ret; 1248 1249 /* first, a dummy read, needed to latch some MII phys */ 1250 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1251 if (ret < 0) 1252 return ret; 1253 1254 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1255 if (ret < 0) 1256 return ret; 1257 1258 return !!(ret & BMSR_LSTATUS); 1259 } 1260 1261 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1262 { 1263 struct smsc95xx_priv *pdata = dev->driver_priv; 1264 u32 val; 1265 int ret; 1266 1267 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1268 if (ret < 0) 1269 return ret; 1270 1271 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1272 val |= PM_CTL_SUS_MODE_0; 1273 1274 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1275 if (ret < 0) 1276 return ret; 1277 1278 /* clear wol status */ 1279 val &= ~PM_CTL_WUPS_; 1280 val |= PM_CTL_WUPS_WOL_; 1281 1282 /* enable energy detection */ 1283 if (pdata->wolopts & WAKE_PHY) 1284 val |= PM_CTL_WUPS_ED_; 1285 1286 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1287 if (ret < 0) 1288 return ret; 1289 1290 /* read back PM_CTRL */ 1291 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1292 if (ret < 0) 1293 return ret; 1294 1295 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1296 1297 return 0; 1298 } 1299 1300 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1301 { 1302 struct smsc95xx_priv *pdata = dev->driver_priv; 1303 u32 val; 1304 int ret; 1305 1306 /* reconfigure link pulse detection timing for 1307 * compatibility with non-standard link partners 1308 */ 1309 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1310 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG, 1311 PHY_EDPD_CONFIG_DEFAULT); 1312 1313 /* enable energy detect power-down mode */ 1314 ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS); 1315 if (ret < 0) 1316 return ret; 1317 1318 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1319 1320 smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret); 1321 1322 /* enter SUSPEND1 mode */ 1323 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1324 if (ret < 0) 1325 return ret; 1326 1327 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1328 val |= PM_CTL_SUS_MODE_1; 1329 1330 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1331 if (ret < 0) 1332 return ret; 1333 1334 /* clear wol status, enable energy detection */ 1335 val &= ~PM_CTL_WUPS_; 1336 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1337 1338 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1339 if (ret < 0) 1340 return ret; 1341 1342 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1343 1344 return 0; 1345 } 1346 1347 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1348 { 1349 struct smsc95xx_priv *pdata = dev->driver_priv; 1350 u32 val; 1351 int ret; 1352 1353 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1354 if (ret < 0) 1355 return ret; 1356 1357 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1358 val |= PM_CTL_SUS_MODE_2; 1359 1360 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1361 if (ret < 0) 1362 return ret; 1363 1364 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1365 1366 return 0; 1367 } 1368 1369 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1370 { 1371 struct smsc95xx_priv *pdata = dev->driver_priv; 1372 u32 val; 1373 int ret; 1374 1375 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1376 if (ret < 0) 1377 return ret; 1378 1379 if (val & RX_FIFO_INF_USED_) { 1380 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1381 return -EBUSY; 1382 } 1383 1384 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1385 if (ret < 0) 1386 return ret; 1387 1388 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1389 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1390 1391 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1392 if (ret < 0) 1393 return ret; 1394 1395 /* clear wol status */ 1396 val &= ~PM_CTL_WUPS_; 1397 val |= PM_CTL_WUPS_WOL_; 1398 1399 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1400 if (ret < 0) 1401 return ret; 1402 1403 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1404 1405 return 0; 1406 } 1407 1408 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1409 { 1410 struct smsc95xx_priv *pdata = dev->driver_priv; 1411 int ret; 1412 1413 if (!netif_running(dev->net)) { 1414 /* interface is ifconfig down so fully power down hw */ 1415 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1416 return smsc95xx_enter_suspend2(dev); 1417 } 1418 1419 if (!link_up) { 1420 /* link is down so enter EDPD mode, but only if device can 1421 * reliably resume from it. This check should be redundant 1422 * as current FEATURE_REMOTE_WAKEUP parts also support 1423 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1424 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1425 netdev_warn(dev->net, "EDPD not supported\n"); 1426 return -EBUSY; 1427 } 1428 1429 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1430 1431 /* enable PHY wakeup events for if cable is attached */ 1432 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1433 PHY_INT_MASK_ANEG_COMP_); 1434 if (ret < 0) { 1435 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1436 return ret; 1437 } 1438 1439 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1440 return smsc95xx_enter_suspend1(dev); 1441 } 1442 1443 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1444 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1445 PHY_INT_MASK_LINK_DOWN_); 1446 if (ret < 0) { 1447 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1448 return ret; 1449 } 1450 1451 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1452 return smsc95xx_enter_suspend3(dev); 1453 } 1454 1455 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1456 { 1457 struct usbnet *dev = usb_get_intfdata(intf); 1458 struct smsc95xx_priv *pdata = dev->driver_priv; 1459 u32 val, link_up; 1460 int ret; 1461 1462 ret = usbnet_suspend(intf, message); 1463 if (ret < 0) { 1464 netdev_warn(dev->net, "usbnet_suspend error\n"); 1465 return ret; 1466 } 1467 1468 if (pdata->suspend_flags) { 1469 netdev_warn(dev->net, "error during last resume\n"); 1470 pdata->suspend_flags = 0; 1471 } 1472 1473 /* determine if link is up using only _nopm functions */ 1474 link_up = smsc95xx_link_ok_nopm(dev); 1475 1476 if (message.event == PM_EVENT_AUTO_SUSPEND && 1477 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1478 ret = smsc95xx_autosuspend(dev, link_up); 1479 goto done; 1480 } 1481 1482 /* if we get this far we're not autosuspending */ 1483 /* if no wol options set, or if link is down and we're not waking on 1484 * PHY activity, enter lowest power SUSPEND2 mode 1485 */ 1486 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1487 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1488 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1489 1490 /* disable energy detect (link up) & wake up events */ 1491 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1492 if (ret < 0) 1493 goto done; 1494 1495 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1496 1497 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1498 if (ret < 0) 1499 goto done; 1500 1501 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1502 if (ret < 0) 1503 goto done; 1504 1505 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1506 1507 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1508 if (ret < 0) 1509 goto done; 1510 1511 ret = smsc95xx_enter_suspend2(dev); 1512 goto done; 1513 } 1514 1515 if (pdata->wolopts & WAKE_PHY) { 1516 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1517 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1518 if (ret < 0) { 1519 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1520 goto done; 1521 } 1522 1523 /* if link is down then configure EDPD and enter SUSPEND1, 1524 * otherwise enter SUSPEND0 below 1525 */ 1526 if (!link_up) { 1527 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1528 ret = smsc95xx_enter_suspend1(dev); 1529 goto done; 1530 } 1531 } 1532 1533 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1534 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1535 u32 command[2]; 1536 u32 offset[2]; 1537 u32 crc[4]; 1538 int wuff_filter_count = 1539 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1540 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1541 int i, filter = 0; 1542 1543 if (!filter_mask) { 1544 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1545 ret = -ENOMEM; 1546 goto done; 1547 } 1548 1549 memset(command, 0, sizeof(command)); 1550 memset(offset, 0, sizeof(offset)); 1551 memset(crc, 0, sizeof(crc)); 1552 1553 if (pdata->wolopts & WAKE_BCAST) { 1554 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1555 netdev_info(dev->net, "enabling broadcast detection\n"); 1556 filter_mask[filter * 4] = 0x003F; 1557 filter_mask[filter * 4 + 1] = 0x00; 1558 filter_mask[filter * 4 + 2] = 0x00; 1559 filter_mask[filter * 4 + 3] = 0x00; 1560 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1561 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1562 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1563 filter++; 1564 } 1565 1566 if (pdata->wolopts & WAKE_MCAST) { 1567 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1568 netdev_info(dev->net, "enabling multicast detection\n"); 1569 filter_mask[filter * 4] = 0x0007; 1570 filter_mask[filter * 4 + 1] = 0x00; 1571 filter_mask[filter * 4 + 2] = 0x00; 1572 filter_mask[filter * 4 + 3] = 0x00; 1573 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1574 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1575 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1576 filter++; 1577 } 1578 1579 if (pdata->wolopts & WAKE_ARP) { 1580 const u8 arp[] = {0x08, 0x06}; 1581 netdev_info(dev->net, "enabling ARP detection\n"); 1582 filter_mask[filter * 4] = 0x0003; 1583 filter_mask[filter * 4 + 1] = 0x00; 1584 filter_mask[filter * 4 + 2] = 0x00; 1585 filter_mask[filter * 4 + 3] = 0x00; 1586 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1587 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1588 crc[filter/2] |= smsc_crc(arp, 2, filter); 1589 filter++; 1590 } 1591 1592 if (pdata->wolopts & WAKE_UCAST) { 1593 netdev_info(dev->net, "enabling unicast detection\n"); 1594 filter_mask[filter * 4] = 0x003F; 1595 filter_mask[filter * 4 + 1] = 0x00; 1596 filter_mask[filter * 4 + 2] = 0x00; 1597 filter_mask[filter * 4 + 3] = 0x00; 1598 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1599 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1600 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1601 filter++; 1602 } 1603 1604 for (i = 0; i < (wuff_filter_count * 4); i++) { 1605 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1606 if (ret < 0) { 1607 kfree(filter_mask); 1608 goto done; 1609 } 1610 } 1611 kfree(filter_mask); 1612 1613 for (i = 0; i < (wuff_filter_count / 4); i++) { 1614 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1615 if (ret < 0) 1616 goto done; 1617 } 1618 1619 for (i = 0; i < (wuff_filter_count / 4); i++) { 1620 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1621 if (ret < 0) 1622 goto done; 1623 } 1624 1625 for (i = 0; i < (wuff_filter_count / 2); i++) { 1626 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1627 if (ret < 0) 1628 goto done; 1629 } 1630 1631 /* clear any pending pattern match packet status */ 1632 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1633 if (ret < 0) 1634 goto done; 1635 1636 val |= WUCSR_WUFR_; 1637 1638 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1639 if (ret < 0) 1640 goto done; 1641 } 1642 1643 if (pdata->wolopts & WAKE_MAGIC) { 1644 /* clear any pending magic packet status */ 1645 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1646 if (ret < 0) 1647 goto done; 1648 1649 val |= WUCSR_MPR_; 1650 1651 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1652 if (ret < 0) 1653 goto done; 1654 } 1655 1656 /* enable/disable wakeup sources */ 1657 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1658 if (ret < 0) 1659 goto done; 1660 1661 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1662 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1663 val |= WUCSR_WAKE_EN_; 1664 } else { 1665 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1666 val &= ~WUCSR_WAKE_EN_; 1667 } 1668 1669 if (pdata->wolopts & WAKE_MAGIC) { 1670 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1671 val |= WUCSR_MPEN_; 1672 } else { 1673 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1674 val &= ~WUCSR_MPEN_; 1675 } 1676 1677 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1678 if (ret < 0) 1679 goto done; 1680 1681 /* enable wol wakeup source */ 1682 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1683 if (ret < 0) 1684 goto done; 1685 1686 val |= PM_CTL_WOL_EN_; 1687 1688 /* phy energy detect wakeup source */ 1689 if (pdata->wolopts & WAKE_PHY) 1690 val |= PM_CTL_ED_EN_; 1691 1692 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1693 if (ret < 0) 1694 goto done; 1695 1696 /* enable receiver to enable frame reception */ 1697 smsc95xx_start_rx_path(dev, 1); 1698 1699 /* some wol options are enabled, so enter SUSPEND0 */ 1700 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1701 ret = smsc95xx_enter_suspend0(dev); 1702 1703 done: 1704 /* 1705 * TODO: resume() might need to handle the suspend failure 1706 * in system sleep 1707 */ 1708 if (ret && PMSG_IS_AUTO(message)) 1709 usbnet_resume(intf); 1710 1711 return ret; 1712 } 1713 1714 static int smsc95xx_resume(struct usb_interface *intf) 1715 { 1716 struct usbnet *dev = usb_get_intfdata(intf); 1717 struct smsc95xx_priv *pdata; 1718 u8 suspend_flags; 1719 int ret; 1720 u32 val; 1721 1722 BUG_ON(!dev); 1723 pdata = dev->driver_priv; 1724 suspend_flags = pdata->suspend_flags; 1725 1726 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1727 1728 /* do this first to ensure it's cleared even in error case */ 1729 pdata->suspend_flags = 0; 1730 1731 if (suspend_flags & SUSPEND_ALLMODES) { 1732 /* clear wake-up sources */ 1733 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1734 if (ret < 0) 1735 return ret; 1736 1737 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1738 1739 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1740 if (ret < 0) 1741 return ret; 1742 1743 /* clear wake-up status */ 1744 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1745 if (ret < 0) 1746 return ret; 1747 1748 val &= ~PM_CTL_WOL_EN_; 1749 val |= PM_CTL_WUPS_; 1750 1751 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1752 if (ret < 0) 1753 return ret; 1754 } 1755 1756 ret = usbnet_resume(intf); 1757 if (ret < 0) 1758 netdev_warn(dev->net, "usbnet_resume error\n"); 1759 1760 phy_init_hw(pdata->phydev); 1761 return ret; 1762 } 1763 1764 static int smsc95xx_reset_resume(struct usb_interface *intf) 1765 { 1766 struct usbnet *dev = usb_get_intfdata(intf); 1767 int ret; 1768 1769 ret = smsc95xx_reset(dev); 1770 if (ret < 0) 1771 return ret; 1772 1773 return smsc95xx_resume(intf); 1774 } 1775 1776 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1777 { 1778 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1779 skb->ip_summed = CHECKSUM_COMPLETE; 1780 skb_trim(skb, skb->len - 2); 1781 } 1782 1783 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1784 { 1785 /* This check is no longer done by usbnet */ 1786 if (skb->len < dev->net->hard_header_len) 1787 return 0; 1788 1789 while (skb->len > 0) { 1790 u32 header, align_count; 1791 struct sk_buff *ax_skb; 1792 unsigned char *packet; 1793 u16 size; 1794 1795 header = get_unaligned_le32(skb->data); 1796 skb_pull(skb, 4 + NET_IP_ALIGN); 1797 packet = skb->data; 1798 1799 /* get the packet length */ 1800 size = (u16)((header & RX_STS_FL_) >> 16); 1801 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1802 1803 if (unlikely(header & RX_STS_ES_)) { 1804 netif_dbg(dev, rx_err, dev->net, 1805 "Error header=0x%08x\n", header); 1806 dev->net->stats.rx_errors++; 1807 dev->net->stats.rx_dropped++; 1808 1809 if (header & RX_STS_CRC_) { 1810 dev->net->stats.rx_crc_errors++; 1811 } else { 1812 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1813 dev->net->stats.rx_frame_errors++; 1814 1815 if ((header & RX_STS_LE_) && 1816 (!(header & RX_STS_FT_))) 1817 dev->net->stats.rx_length_errors++; 1818 } 1819 } else { 1820 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1821 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1822 netif_dbg(dev, rx_err, dev->net, 1823 "size err header=0x%08x\n", header); 1824 return 0; 1825 } 1826 1827 /* last frame in this batch */ 1828 if (skb->len == size) { 1829 if (dev->net->features & NETIF_F_RXCSUM) 1830 smsc95xx_rx_csum_offload(skb); 1831 skb_trim(skb, skb->len - 4); /* remove fcs */ 1832 skb->truesize = size + sizeof(struct sk_buff); 1833 1834 return 1; 1835 } 1836 1837 ax_skb = skb_clone(skb, GFP_ATOMIC); 1838 if (unlikely(!ax_skb)) { 1839 netdev_warn(dev->net, "Error allocating skb\n"); 1840 return 0; 1841 } 1842 1843 ax_skb->len = size; 1844 ax_skb->data = packet; 1845 skb_set_tail_pointer(ax_skb, size); 1846 1847 if (dev->net->features & NETIF_F_RXCSUM) 1848 smsc95xx_rx_csum_offload(ax_skb); 1849 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1850 ax_skb->truesize = size + sizeof(struct sk_buff); 1851 1852 usbnet_skb_return(dev, ax_skb); 1853 } 1854 1855 skb_pull(skb, size); 1856 1857 /* padding bytes before the next frame starts */ 1858 if (skb->len) 1859 skb_pull(skb, align_count); 1860 } 1861 1862 return 1; 1863 } 1864 1865 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1866 { 1867 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1868 u16 high_16 = low_16 + skb->csum_offset; 1869 return (high_16 << 16) | low_16; 1870 } 1871 1872 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1873 * transmission. This is fairly unlikely, only seems to trigger with some 1874 * short TCP ACK packets sent. 1875 * 1876 * Note, this calculation should probably check for the alignment of the 1877 * data as well, but a straight check for csum being in the last four bytes 1878 * of the packet should be ok for now. 1879 */ 1880 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1881 { 1882 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1883 1884 if (skb->len <= 45) 1885 return false; 1886 return skb->csum_offset < (len - (4 + 1)); 1887 } 1888 1889 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1890 struct sk_buff *skb, gfp_t flags) 1891 { 1892 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1893 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1894 u32 tx_cmd_a, tx_cmd_b; 1895 void *ptr; 1896 1897 /* We do not advertise SG, so skbs should be already linearized */ 1898 BUG_ON(skb_shinfo(skb)->nr_frags); 1899 1900 /* Make writable and expand header space by overhead if required */ 1901 if (skb_cow_head(skb, overhead)) { 1902 /* Must deallocate here as returning NULL to indicate error 1903 * means the skb won't be deallocated in the caller. 1904 */ 1905 dev_kfree_skb_any(skb); 1906 return NULL; 1907 } 1908 1909 tx_cmd_b = (u32)skb->len; 1910 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1911 1912 if (csum) { 1913 if (!smsc95xx_can_tx_checksum(skb)) { 1914 /* workaround - hardware tx checksum does not work 1915 * properly with extremely small packets */ 1916 long csstart = skb_checksum_start_offset(skb); 1917 __wsum calc = csum_partial(skb->data + csstart, 1918 skb->len - csstart, 0); 1919 *((__sum16 *)(skb->data + csstart 1920 + skb->csum_offset)) = csum_fold(calc); 1921 1922 csum = false; 1923 } else { 1924 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1925 ptr = skb_push(skb, 4); 1926 put_unaligned_le32(csum_preamble, ptr); 1927 1928 tx_cmd_a += 4; 1929 tx_cmd_b += 4; 1930 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1931 } 1932 } 1933 1934 ptr = skb_push(skb, 8); 1935 put_unaligned_le32(tx_cmd_a, ptr); 1936 put_unaligned_le32(tx_cmd_b, ptr+4); 1937 1938 return skb; 1939 } 1940 1941 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1942 { 1943 struct smsc95xx_priv *pdata = dev->driver_priv; 1944 1945 dev->intf->needs_remote_wakeup = on; 1946 1947 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1948 return 0; 1949 1950 /* this chip revision isn't capable of remote wakeup */ 1951 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1952 1953 if (on) 1954 usb_autopm_get_interface_no_resume(dev->intf); 1955 else 1956 usb_autopm_put_interface(dev->intf); 1957 1958 return 0; 1959 } 1960 1961 static const struct driver_info smsc95xx_info = { 1962 .description = "smsc95xx USB 2.0 Ethernet", 1963 .bind = smsc95xx_bind, 1964 .unbind = smsc95xx_unbind, 1965 .link_reset = smsc95xx_link_reset, 1966 .reset = smsc95xx_start_phy, 1967 .stop = smsc95xx_disconnect_phy, 1968 .rx_fixup = smsc95xx_rx_fixup, 1969 .tx_fixup = smsc95xx_tx_fixup, 1970 .status = smsc95xx_status, 1971 .manage_power = smsc95xx_manage_power, 1972 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 1973 }; 1974 1975 static const struct usb_device_id products[] = { 1976 { 1977 /* SMSC9500 USB Ethernet Device */ 1978 USB_DEVICE(0x0424, 0x9500), 1979 .driver_info = (unsigned long) &smsc95xx_info, 1980 }, 1981 { 1982 /* SMSC9505 USB Ethernet Device */ 1983 USB_DEVICE(0x0424, 0x9505), 1984 .driver_info = (unsigned long) &smsc95xx_info, 1985 }, 1986 { 1987 /* SMSC9500A USB Ethernet Device */ 1988 USB_DEVICE(0x0424, 0x9E00), 1989 .driver_info = (unsigned long) &smsc95xx_info, 1990 }, 1991 { 1992 /* SMSC9505A USB Ethernet Device */ 1993 USB_DEVICE(0x0424, 0x9E01), 1994 .driver_info = (unsigned long) &smsc95xx_info, 1995 }, 1996 { 1997 /* SMSC9512/9514 USB Hub & Ethernet Device */ 1998 USB_DEVICE(0x0424, 0xec00), 1999 .driver_info = (unsigned long) &smsc95xx_info, 2000 }, 2001 { 2002 /* SMSC9500 USB Ethernet Device (SAL10) */ 2003 USB_DEVICE(0x0424, 0x9900), 2004 .driver_info = (unsigned long) &smsc95xx_info, 2005 }, 2006 { 2007 /* SMSC9505 USB Ethernet Device (SAL10) */ 2008 USB_DEVICE(0x0424, 0x9901), 2009 .driver_info = (unsigned long) &smsc95xx_info, 2010 }, 2011 { 2012 /* SMSC9500A USB Ethernet Device (SAL10) */ 2013 USB_DEVICE(0x0424, 0x9902), 2014 .driver_info = (unsigned long) &smsc95xx_info, 2015 }, 2016 { 2017 /* SMSC9505A USB Ethernet Device (SAL10) */ 2018 USB_DEVICE(0x0424, 0x9903), 2019 .driver_info = (unsigned long) &smsc95xx_info, 2020 }, 2021 { 2022 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2023 USB_DEVICE(0x0424, 0x9904), 2024 .driver_info = (unsigned long) &smsc95xx_info, 2025 }, 2026 { 2027 /* SMSC9500A USB Ethernet Device (HAL) */ 2028 USB_DEVICE(0x0424, 0x9905), 2029 .driver_info = (unsigned long) &smsc95xx_info, 2030 }, 2031 { 2032 /* SMSC9505A USB Ethernet Device (HAL) */ 2033 USB_DEVICE(0x0424, 0x9906), 2034 .driver_info = (unsigned long) &smsc95xx_info, 2035 }, 2036 { 2037 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2038 USB_DEVICE(0x0424, 0x9907), 2039 .driver_info = (unsigned long) &smsc95xx_info, 2040 }, 2041 { 2042 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2043 USB_DEVICE(0x0424, 0x9908), 2044 .driver_info = (unsigned long) &smsc95xx_info, 2045 }, 2046 { 2047 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2048 USB_DEVICE(0x0424, 0x9909), 2049 .driver_info = (unsigned long) &smsc95xx_info, 2050 }, 2051 { 2052 /* SMSC LAN9530 USB Ethernet Device */ 2053 USB_DEVICE(0x0424, 0x9530), 2054 .driver_info = (unsigned long) &smsc95xx_info, 2055 }, 2056 { 2057 /* SMSC LAN9730 USB Ethernet Device */ 2058 USB_DEVICE(0x0424, 0x9730), 2059 .driver_info = (unsigned long) &smsc95xx_info, 2060 }, 2061 { 2062 /* SMSC LAN89530 USB Ethernet Device */ 2063 USB_DEVICE(0x0424, 0x9E08), 2064 .driver_info = (unsigned long) &smsc95xx_info, 2065 }, 2066 { }, /* END */ 2067 }; 2068 MODULE_DEVICE_TABLE(usb, products); 2069 2070 static struct usb_driver smsc95xx_driver = { 2071 .name = "smsc95xx", 2072 .id_table = products, 2073 .probe = usbnet_probe, 2074 .suspend = smsc95xx_suspend, 2075 .resume = smsc95xx_resume, 2076 .reset_resume = smsc95xx_reset_resume, 2077 .disconnect = usbnet_disconnect, 2078 .disable_hub_initiated_lpm = 1, 2079 .supports_autosuspend = 1, 2080 }; 2081 2082 module_usb_driver(smsc95xx_driver); 2083 2084 MODULE_AUTHOR("Nancy Lin"); 2085 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2086 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2087 MODULE_LICENSE("GPL"); 2088