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 54struct 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 struct task_struct *pm_task; 65}; 66 67static bool turbo_mode = true; 68module_param(turbo_mode, bool, 0644); 69MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 70 71static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index, 72 u32 *data, int in_pm) 73{ 74 struct smsc95xx_priv *pdata = dev->driver_priv; 75 u32 buf; 76 int ret; 77 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 78 79 BUG_ON(!dev); 80 81 if (current != pdata->pm_task) 82 fn = usbnet_read_cmd; 83 else 84 fn = usbnet_read_cmd_nopm; 85 86 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 87 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 88 0, index, &buf, 4); 89 if (ret < 4) { 90 ret = ret < 0 ? ret : -ENODATA; 91 92 if (ret != -ENODEV) 93 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 94 index, ret); 95 return ret; 96 } 97 98 le32_to_cpus(&buf); 99 *data = buf; 100 101 return ret; 102} 103 104static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index, 105 u32 data, int in_pm) 106{ 107 struct smsc95xx_priv *pdata = dev->driver_priv; 108 u32 buf; 109 int ret; 110 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 111 112 BUG_ON(!dev); 113 114 if (current != pdata->pm_task) 115 fn = usbnet_write_cmd; 116 else 117 fn = usbnet_write_cmd_nopm; 118 119 buf = data; 120 cpu_to_le32s(&buf); 121 122 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 123 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 124 0, index, &buf, 4); 125 if (ret < 0 && ret != -ENODEV) 126 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 127 index, ret); 128 129 return ret; 130} 131 132static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index, 133 u32 *data) 134{ 135 return __smsc95xx_read_reg(dev, index, data, 1); 136} 137 138static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index, 139 u32 data) 140{ 141 return __smsc95xx_write_reg(dev, index, data, 1); 142} 143 144static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 145 u32 *data) 146{ 147 return __smsc95xx_read_reg(dev, index, data, 0); 148} 149 150static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 151 u32 data) 152{ 153 return __smsc95xx_write_reg(dev, index, data, 0); 154} 155 156/* Loop until the read is completed with timeout 157 * called with phy_mutex held */ 158static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev, 159 int in_pm) 160{ 161 unsigned long start_time = jiffies; 162 u32 val; 163 int ret; 164 165 do { 166 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm); 167 if (ret < 0) { 168 /* Ignore -ENODEV error during disconnect() */ 169 if (ret == -ENODEV) 170 return 0; 171 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 172 return ret; 173 } 174 175 if (!(val & MII_BUSY_)) 176 return 0; 177 } while (!time_after(jiffies, start_time + HZ)); 178 179 return -EIO; 180} 181 182static u32 mii_address_cmd(int phy_id, int idx, u16 op) 183{ 184 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 185} 186 187static int __smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx, 188 int in_pm) 189{ 190 u32 val, addr; 191 int ret; 192 193 mutex_lock(&dev->phy_mutex); 194 195 /* confirm MII not busy */ 196 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 197 if (ret < 0) { 198 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 199 goto done; 200 } 201 202 /* set the address, index & direction (read from PHY) */ 203 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 204 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 205 if (ret < 0) { 206 if (ret != -ENODEV) 207 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 208 goto done; 209 } 210 211 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 212 if (ret < 0) { 213 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 214 goto done; 215 } 216 217 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm); 218 if (ret < 0) { 219 if (ret != -ENODEV) 220 netdev_warn(dev->net, "Error reading MII_DATA\n"); 221 goto done; 222 } 223 224 ret = (u16)(val & 0xFFFF); 225 226done: 227 mutex_unlock(&dev->phy_mutex); 228 229 /* Ignore -ENODEV error during disconnect() */ 230 if (ret == -ENODEV) 231 return 0; 232 return ret; 233} 234 235static void __smsc95xx_mdio_write(struct usbnet *dev, int phy_id, 236 int idx, int regval, int in_pm) 237{ 238 u32 val, addr; 239 int ret; 240 241 mutex_lock(&dev->phy_mutex); 242 243 /* confirm MII not busy */ 244 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 245 if (ret < 0) { 246 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 247 goto done; 248 } 249 250 val = regval; 251 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm); 252 if (ret < 0) { 253 if (ret != -ENODEV) 254 netdev_warn(dev->net, "Error writing MII_DATA\n"); 255 goto done; 256 } 257 258 /* set the address, index & direction (write to PHY) */ 259 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 260 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 261 if (ret < 0) { 262 if (ret != -ENODEV) 263 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 264 goto done; 265 } 266 267 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 268 if (ret < 0) { 269 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 270 goto done; 271 } 272 273done: 274 mutex_unlock(&dev->phy_mutex); 275} 276 277static int smsc95xx_mdio_read_nopm(struct usbnet *dev, int idx) 278{ 279 struct smsc95xx_priv *pdata = dev->driver_priv; 280 281 return __smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, idx, 1); 282} 283 284static void smsc95xx_mdio_write_nopm(struct usbnet *dev, int idx, int regval) 285{ 286 struct smsc95xx_priv *pdata = dev->driver_priv; 287 288 __smsc95xx_mdio_write(dev, pdata->phydev->mdio.addr, idx, regval, 1); 289} 290 291static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 292{ 293 struct usbnet *dev = bus->priv; 294 295 return __smsc95xx_mdio_read(dev, phy_id, idx, 0); 296} 297 298static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 299 u16 regval) 300{ 301 struct usbnet *dev = bus->priv; 302 303 __smsc95xx_mdio_write(dev, phy_id, idx, regval, 0); 304 return 0; 305} 306 307static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 308{ 309 unsigned long start_time = jiffies; 310 u32 val; 311 int ret; 312 313 do { 314 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 315 if (ret < 0) { 316 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 317 return ret; 318 } 319 320 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 321 break; 322 udelay(40); 323 } while (!time_after(jiffies, start_time + HZ)); 324 325 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 326 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 327 return -EIO; 328 } 329 330 return 0; 331} 332 333static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 334{ 335 unsigned long start_time = jiffies; 336 u32 val; 337 int ret; 338 339 do { 340 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 341 if (ret < 0) { 342 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 343 return ret; 344 } 345 346 if (!(val & E2P_CMD_BUSY_)) 347 return 0; 348 349 udelay(40); 350 } while (!time_after(jiffies, start_time + HZ)); 351 352 netdev_warn(dev->net, "EEPROM is busy\n"); 353 return -EIO; 354} 355 356static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 357 u8 *data) 358{ 359 u32 val; 360 int i, ret; 361 362 BUG_ON(!dev); 363 BUG_ON(!data); 364 365 ret = smsc95xx_eeprom_confirm_not_busy(dev); 366 if (ret) 367 return ret; 368 369 for (i = 0; i < length; i++) { 370 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 371 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 372 if (ret < 0) { 373 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 374 return ret; 375 } 376 377 ret = smsc95xx_wait_eeprom(dev); 378 if (ret < 0) 379 return ret; 380 381 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 382 if (ret < 0) { 383 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 384 return ret; 385 } 386 387 data[i] = val & 0xFF; 388 offset++; 389 } 390 391 return 0; 392} 393 394static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 395 u8 *data) 396{ 397 u32 val; 398 int i, ret; 399 400 BUG_ON(!dev); 401 BUG_ON(!data); 402 403 ret = smsc95xx_eeprom_confirm_not_busy(dev); 404 if (ret) 405 return ret; 406 407 /* Issue write/erase enable command */ 408 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 409 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 410 if (ret < 0) { 411 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 412 return ret; 413 } 414 415 ret = smsc95xx_wait_eeprom(dev); 416 if (ret < 0) 417 return ret; 418 419 for (i = 0; i < length; i++) { 420 421 /* Fill data register */ 422 val = data[i]; 423 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 424 if (ret < 0) { 425 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 426 return ret; 427 } 428 429 /* Send "write" command */ 430 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 431 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 432 if (ret < 0) { 433 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 434 return ret; 435 } 436 437 ret = smsc95xx_wait_eeprom(dev); 438 if (ret < 0) 439 return ret; 440 441 offset++; 442 } 443 444 return 0; 445} 446 447static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 448 u32 data) 449{ 450 const u16 size = 4; 451 u32 buf; 452 int ret; 453 454 buf = data; 455 cpu_to_le32s(&buf); 456 457 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 458 USB_DIR_OUT | USB_TYPE_VENDOR | 459 USB_RECIP_DEVICE, 460 0, index, &buf, size); 461 if (ret < 0) 462 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 463 ret); 464 return ret; 465} 466 467/* returns hash bit number for given MAC address 468 * example: 469 * 01 00 5E 00 00 01 -> returns bit number 31 */ 470static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 471{ 472 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 473} 474 475static void smsc95xx_set_multicast(struct net_device *netdev) 476{ 477 struct usbnet *dev = netdev_priv(netdev); 478 struct smsc95xx_priv *pdata = dev->driver_priv; 479 unsigned long flags; 480 int ret; 481 482 pdata->hash_hi = 0; 483 pdata->hash_lo = 0; 484 485 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 486 487 if (dev->net->flags & IFF_PROMISC) { 488 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 489 pdata->mac_cr |= MAC_CR_PRMS_; 490 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 491 } else if (dev->net->flags & IFF_ALLMULTI) { 492 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 493 pdata->mac_cr |= MAC_CR_MCPAS_; 494 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 495 } else if (!netdev_mc_empty(dev->net)) { 496 struct netdev_hw_addr *ha; 497 498 pdata->mac_cr |= MAC_CR_HPFILT_; 499 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 500 501 netdev_for_each_mc_addr(ha, netdev) { 502 u32 bitnum = smsc95xx_hash(ha->addr); 503 u32 mask = 0x01 << (bitnum & 0x1F); 504 if (bitnum & 0x20) 505 pdata->hash_hi |= mask; 506 else 507 pdata->hash_lo |= mask; 508 } 509 510 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 511 pdata->hash_hi, pdata->hash_lo); 512 } else { 513 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 514 pdata->mac_cr &= 515 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 516 } 517 518 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 519 520 /* Initiate async writes, as we can't wait for completion here */ 521 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 522 if (ret < 0) 523 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 524 525 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 526 if (ret < 0) 527 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 528 529 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 530 if (ret < 0) 531 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 532} 533 534static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 535{ 536 u32 flow = 0, afc_cfg; 537 struct smsc95xx_priv *pdata = dev->driver_priv; 538 bool tx_pause, rx_pause; 539 540 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 541 if (ret < 0) 542 return ret; 543 544 if (pdata->phydev->duplex == DUPLEX_FULL) { 545 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 546 547 if (rx_pause) 548 flow = 0xFFFF0002; 549 550 if (tx_pause) { 551 afc_cfg |= 0xF; 552 flow |= 0xFFFF0000; 553 } else { 554 afc_cfg &= ~0xF; 555 } 556 557 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 558 rx_pause ? "enabled" : "disabled", 559 tx_pause ? "enabled" : "disabled"); 560 } else { 561 netif_dbg(dev, link, dev->net, "half duplex\n"); 562 afc_cfg |= 0xF; 563 } 564 565 ret = smsc95xx_write_reg(dev, FLOW, flow); 566 if (ret < 0) 567 return ret; 568 569 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 570} 571 572static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) 573{ 574 struct smsc95xx_priv *pdata = dev->driver_priv; 575 unsigned long flags; 576 int ret; 577 578 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 579 if (pdata->phydev->duplex != DUPLEX_FULL) { 580 pdata->mac_cr &= ~MAC_CR_FDPX_; 581 pdata->mac_cr |= MAC_CR_RCVOWN_; 582 } else { 583 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 584 pdata->mac_cr |= MAC_CR_FDPX_; 585 } 586 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 587 588 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 589 if (ret < 0) { 590 if (ret != -ENODEV) 591 netdev_warn(dev->net, 592 "Error updating MAC full duplex mode\n"); 593 return; 594 } 595 596 ret = smsc95xx_phy_update_flowcontrol(dev); 597 if (ret < 0) 598 netdev_warn(dev->net, "Error updating PHY flow control\n"); 599} 600 601static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 602{ 603 u32 intdata; 604 605 if (urb->actual_length != 4) { 606 netdev_warn(dev->net, "unexpected urb length %d\n", 607 urb->actual_length); 608 return; 609 } 610 611 intdata = get_unaligned_le32(urb->transfer_buffer); 612 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 613 614 if (intdata & INT_ENP_PHY_INT_) 615 ; 616 else 617 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 618 intdata); 619} 620 621/* Enable or disable Tx & Rx checksum offload engines */ 622static int smsc95xx_set_features(struct net_device *netdev, 623 netdev_features_t features) 624{ 625 struct usbnet *dev = netdev_priv(netdev); 626 u32 read_buf; 627 int ret; 628 629 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 630 if (ret < 0) 631 return ret; 632 633 if (features & NETIF_F_IP_CSUM) 634 read_buf |= Tx_COE_EN_; 635 else 636 read_buf &= ~Tx_COE_EN_; 637 638 if (features & NETIF_F_RXCSUM) 639 read_buf |= Rx_COE_EN_; 640 else 641 read_buf &= ~Rx_COE_EN_; 642 643 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 644 if (ret < 0) 645 return ret; 646 647 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 648 return 0; 649} 650 651static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 652{ 653 return MAX_EEPROM_SIZE; 654} 655 656static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 657 struct ethtool_eeprom *ee, u8 *data) 658{ 659 struct usbnet *dev = netdev_priv(netdev); 660 661 ee->magic = LAN95XX_EEPROM_MAGIC; 662 663 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 664} 665 666static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 667 struct ethtool_eeprom *ee, u8 *data) 668{ 669 struct usbnet *dev = netdev_priv(netdev); 670 671 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 672 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 673 ee->magic); 674 return -EINVAL; 675 } 676 677 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 678} 679 680static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 681{ 682 /* all smsc95xx registers */ 683 return COE_CR - ID_REV + sizeof(u32); 684} 685 686static void 687smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 688 void *buf) 689{ 690 struct usbnet *dev = netdev_priv(netdev); 691 unsigned int i, j; 692 int retval; 693 u32 *data = buf; 694 695 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 696 if (retval < 0) { 697 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 698 return; 699 } 700 701 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 702 retval = smsc95xx_read_reg(dev, i, &data[j]); 703 if (retval < 0) { 704 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 705 return; 706 } 707 } 708} 709 710static void smsc95xx_ethtool_get_wol(struct net_device *net, 711 struct ethtool_wolinfo *wolinfo) 712{ 713 struct usbnet *dev = netdev_priv(net); 714 struct smsc95xx_priv *pdata = dev->driver_priv; 715 716 wolinfo->supported = SUPPORTED_WAKE; 717 wolinfo->wolopts = pdata->wolopts; 718} 719 720static int smsc95xx_ethtool_set_wol(struct net_device *net, 721 struct ethtool_wolinfo *wolinfo) 722{ 723 struct usbnet *dev = netdev_priv(net); 724 struct smsc95xx_priv *pdata = dev->driver_priv; 725 int ret; 726 727 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 728 return -EINVAL; 729 730 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 731 732 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 733 if (ret < 0) 734 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 735 736 return ret; 737} 738 739static u32 smsc95xx_get_link(struct net_device *net) 740{ 741 phy_read_status(net->phydev); 742 return net->phydev->link; 743} 744 745static const struct ethtool_ops smsc95xx_ethtool_ops = { 746 .get_link = smsc95xx_get_link, 747 .nway_reset = phy_ethtool_nway_reset, 748 .get_drvinfo = usbnet_get_drvinfo, 749 .get_msglevel = usbnet_get_msglevel, 750 .set_msglevel = usbnet_set_msglevel, 751 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 752 .get_eeprom = smsc95xx_ethtool_get_eeprom, 753 .set_eeprom = smsc95xx_ethtool_set_eeprom, 754 .get_regs_len = smsc95xx_ethtool_getregslen, 755 .get_regs = smsc95xx_ethtool_getregs, 756 .get_wol = smsc95xx_ethtool_get_wol, 757 .set_wol = smsc95xx_ethtool_set_wol, 758 .get_link_ksettings = phy_ethtool_get_link_ksettings, 759 .set_link_ksettings = phy_ethtool_set_link_ksettings, 760 .get_ts_info = ethtool_op_get_ts_info, 761}; 762 763static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 764{ 765 if (!netif_running(netdev)) 766 return -EINVAL; 767 768 return phy_mii_ioctl(netdev->phydev, rq, cmd); 769} 770 771static void smsc95xx_init_mac_address(struct usbnet *dev) 772{ 773 /* maybe the boot loader passed the MAC address in devicetree */ 774 if (!eth_platform_get_mac_address(&dev->udev->dev, 775 dev->net->dev_addr)) { 776 if (is_valid_ether_addr(dev->net->dev_addr)) { 777 /* device tree values are valid so use them */ 778 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 779 return; 780 } 781 } 782 783 /* try reading mac address from EEPROM */ 784 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 785 dev->net->dev_addr) == 0) { 786 if (is_valid_ether_addr(dev->net->dev_addr)) { 787 /* eeprom values are valid so use them */ 788 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 789 return; 790 } 791 } 792 793 /* no useful static MAC address found. generate a random one */ 794 eth_hw_addr_random(dev->net); 795 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 796} 797 798static int smsc95xx_set_mac_address(struct usbnet *dev) 799{ 800 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 801 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 802 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 803 int ret; 804 805 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 806 if (ret < 0) 807 return ret; 808 809 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 810} 811 812/* starts the TX path */ 813static int smsc95xx_start_tx_path(struct usbnet *dev) 814{ 815 struct smsc95xx_priv *pdata = dev->driver_priv; 816 unsigned long flags; 817 int ret; 818 819 /* Enable Tx at MAC */ 820 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 821 pdata->mac_cr |= MAC_CR_TXEN_; 822 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 823 824 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 825 if (ret < 0) 826 return ret; 827 828 /* Enable Tx at SCSRs */ 829 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 830} 831 832/* Starts the Receive path */ 833static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 834{ 835 struct smsc95xx_priv *pdata = dev->driver_priv; 836 unsigned long flags; 837 838 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 839 pdata->mac_cr |= MAC_CR_RXEN_; 840 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 841 842 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 843} 844 845static int smsc95xx_reset(struct usbnet *dev) 846{ 847 struct smsc95xx_priv *pdata = dev->driver_priv; 848 u32 read_buf, write_buf, burst_cap; 849 int ret = 0, timeout; 850 851 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 852 853 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 854 if (ret < 0) 855 return ret; 856 857 timeout = 0; 858 do { 859 msleep(10); 860 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 861 if (ret < 0) 862 return ret; 863 timeout++; 864 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 865 866 if (timeout >= 100) { 867 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 868 return -ETIMEDOUT; 869 } 870 871 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 872 if (ret < 0) 873 return ret; 874 875 timeout = 0; 876 do { 877 msleep(10); 878 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 879 if (ret < 0) 880 return ret; 881 timeout++; 882 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 883 884 if (timeout >= 100) { 885 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 886 return ret; 887 } 888 889 ret = smsc95xx_set_mac_address(dev); 890 if (ret < 0) 891 return ret; 892 893 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 894 dev->net->dev_addr); 895 896 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 897 if (ret < 0) 898 return ret; 899 900 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 901 read_buf); 902 903 read_buf |= HW_CFG_BIR_; 904 905 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 906 if (ret < 0) 907 return ret; 908 909 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 910 if (ret < 0) 911 return ret; 912 913 netif_dbg(dev, ifup, dev->net, 914 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 915 read_buf); 916 917 if (!turbo_mode) { 918 burst_cap = 0; 919 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 920 } else if (dev->udev->speed == USB_SPEED_HIGH) { 921 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 922 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 923 } else { 924 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 925 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 926 } 927 928 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 929 (ulong)dev->rx_urb_size); 930 931 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 932 if (ret < 0) 933 return ret; 934 935 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 936 if (ret < 0) 937 return ret; 938 939 netif_dbg(dev, ifup, dev->net, 940 "Read Value from BURST_CAP after writing: 0x%08x\n", 941 read_buf); 942 943 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 944 if (ret < 0) 945 return ret; 946 947 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 948 if (ret < 0) 949 return ret; 950 951 netif_dbg(dev, ifup, dev->net, 952 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 953 read_buf); 954 955 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 956 if (ret < 0) 957 return ret; 958 959 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 960 read_buf); 961 962 if (turbo_mode) 963 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 964 965 read_buf &= ~HW_CFG_RXDOFF_; 966 967 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 968 read_buf |= NET_IP_ALIGN << 9; 969 970 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 971 if (ret < 0) 972 return ret; 973 974 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 975 if (ret < 0) 976 return ret; 977 978 netif_dbg(dev, ifup, dev->net, 979 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 980 981 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 982 if (ret < 0) 983 return ret; 984 985 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 986 if (ret < 0) 987 return ret; 988 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 989 990 /* Configure GPIO pins as LED outputs */ 991 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 992 LED_GPIO_CFG_FDX_LED; 993 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 994 if (ret < 0) 995 return ret; 996 997 /* Init Tx */ 998 ret = smsc95xx_write_reg(dev, FLOW, 0); 999 if (ret < 0) 1000 return ret; 1001 1002 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1003 if (ret < 0) 1004 return ret; 1005 1006 /* Don't need mac_cr_lock during initialisation */ 1007 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1008 if (ret < 0) 1009 return ret; 1010 1011 /* Init Rx */ 1012 /* Set Vlan */ 1013 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1014 if (ret < 0) 1015 return ret; 1016 1017 /* Enable or disable checksum offload engines */ 1018 ret = smsc95xx_set_features(dev->net, dev->net->features); 1019 if (ret < 0) { 1020 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1021 return ret; 1022 } 1023 1024 smsc95xx_set_multicast(dev->net); 1025 1026 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1027 if (ret < 0) 1028 return ret; 1029 1030 /* enable PHY interrupts */ 1031 read_buf |= INT_EP_CTL_PHY_INT_; 1032 1033 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1034 if (ret < 0) 1035 return ret; 1036 1037 ret = smsc95xx_start_tx_path(dev); 1038 if (ret < 0) { 1039 netdev_warn(dev->net, "Failed to start TX path\n"); 1040 return ret; 1041 } 1042 1043 ret = smsc95xx_start_rx_path(dev, 0); 1044 if (ret < 0) { 1045 netdev_warn(dev->net, "Failed to start RX path\n"); 1046 return ret; 1047 } 1048 1049 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1050 return 0; 1051} 1052 1053static const struct net_device_ops smsc95xx_netdev_ops = { 1054 .ndo_open = usbnet_open, 1055 .ndo_stop = usbnet_stop, 1056 .ndo_start_xmit = usbnet_start_xmit, 1057 .ndo_tx_timeout = usbnet_tx_timeout, 1058 .ndo_change_mtu = usbnet_change_mtu, 1059 .ndo_get_stats64 = usbnet_get_stats64, 1060 .ndo_set_mac_address = eth_mac_addr, 1061 .ndo_validate_addr = eth_validate_addr, 1062 .ndo_do_ioctl = smsc95xx_ioctl, 1063 .ndo_set_rx_mode = smsc95xx_set_multicast, 1064 .ndo_set_features = smsc95xx_set_features, 1065}; 1066 1067static void smsc95xx_handle_link_change(struct net_device *net) 1068{ 1069 struct usbnet *dev = netdev_priv(net); 1070 1071 phy_print_status(net->phydev); 1072 smsc95xx_mac_update_fullduplex(dev); 1073 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1074} 1075 1076static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1077{ 1078 struct smsc95xx_priv *pdata; 1079 bool is_internal_phy; 1080 u32 val; 1081 int ret; 1082 1083 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1084 1085 ret = usbnet_get_endpoints(dev, intf); 1086 if (ret < 0) { 1087 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1088 return ret; 1089 } 1090 1091 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1092 if (!pdata) 1093 return -ENOMEM; 1094 1095 dev->driver_priv = pdata; 1096 1097 spin_lock_init(&pdata->mac_cr_lock); 1098 1099 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1100 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1101 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1102 * it is transmitted as all ones. The zero transmitted checksum means 1103 * transmitter generated no checksum. Hence, enable csum offload only 1104 * for ipv4 packets. 1105 */ 1106 if (DEFAULT_TX_CSUM_ENABLE) 1107 dev->net->features |= NETIF_F_IP_CSUM; 1108 if (DEFAULT_RX_CSUM_ENABLE) 1109 dev->net->features |= NETIF_F_RXCSUM; 1110 1111 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1112 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1113 1114 smsc95xx_init_mac_address(dev); 1115 1116 /* Init all registers */ 1117 ret = smsc95xx_reset(dev); 1118 if (ret) 1119 goto free_pdata; 1120 1121 pdata->mdiobus = mdiobus_alloc(); 1122 if (!pdata->mdiobus) { 1123 ret = -ENOMEM; 1124 goto free_pdata; 1125 } 1126 1127 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1128 if (ret < 0) 1129 goto free_mdio; 1130 1131 is_internal_phy = !(val & HW_CFG_PSEL_); 1132 if (is_internal_phy) 1133 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1134 1135 pdata->mdiobus->priv = dev; 1136 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1137 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1138 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1139 pdata->mdiobus->parent = &dev->udev->dev; 1140 1141 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1142 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1143 1144 ret = mdiobus_register(pdata->mdiobus); 1145 if (ret) { 1146 netdev_err(dev->net, "Could not register MDIO bus\n"); 1147 goto free_mdio; 1148 } 1149 1150 pdata->phydev = phy_find_first(pdata->mdiobus); 1151 if (!pdata->phydev) { 1152 netdev_err(dev->net, "no PHY found\n"); 1153 ret = -ENODEV; 1154 goto unregister_mdio; 1155 } 1156 1157 pdata->phydev->is_internal = is_internal_phy; 1158 1159 /* detect device revision as different features may be available */ 1160 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1161 if (ret < 0) 1162 goto unregister_mdio; 1163 1164 val >>= 16; 1165 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1166 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1167 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1168 FEATURE_PHY_NLP_CROSSOVER | 1169 FEATURE_REMOTE_WAKEUP); 1170 else if (val == ID_REV_CHIP_ID_9512_) 1171 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1172 1173 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1174 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1175 dev->net->flags |= IFF_MULTICAST; 1176 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1177 dev->net->min_mtu = ETH_MIN_MTU; 1178 dev->net->max_mtu = ETH_DATA_LEN; 1179 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1180 1181 ret = phy_connect_direct(dev->net, pdata->phydev, 1182 &smsc95xx_handle_link_change, 1183 PHY_INTERFACE_MODE_MII); 1184 if (ret) { 1185 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1186 goto unregister_mdio; 1187 } 1188 1189 phy_attached_info(dev->net->phydev); 1190 1191 return 0; 1192 1193unregister_mdio: 1194 mdiobus_unregister(pdata->mdiobus); 1195 1196free_mdio: 1197 mdiobus_free(pdata->mdiobus); 1198 1199free_pdata: 1200 kfree(pdata); 1201 return ret; 1202} 1203 1204static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1205{ 1206 struct smsc95xx_priv *pdata = dev->driver_priv; 1207 1208 phy_disconnect(dev->net->phydev); 1209 mdiobus_unregister(pdata->mdiobus); 1210 mdiobus_free(pdata->mdiobus); 1211 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1212 kfree(pdata); 1213} 1214 1215static int smsc95xx_start_phy(struct usbnet *dev) 1216{ 1217 phy_start(dev->net->phydev); 1218 1219 return 0; 1220} 1221 1222static int smsc95xx_stop(struct usbnet *dev) 1223{ 1224 if (dev->net->phydev) 1225 phy_stop(dev->net->phydev); 1226 1227 return 0; 1228} 1229 1230static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1231{ 1232 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1233 return crc << ((filter % 2) * 16); 1234} 1235 1236static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1237{ 1238 int ret; 1239 1240 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1241 1242 /* read to clear */ 1243 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_SRC); 1244 if (ret < 0) 1245 return ret; 1246 1247 /* enable interrupt source */ 1248 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_MASK); 1249 if (ret < 0) 1250 return ret; 1251 1252 ret |= mask; 1253 1254 smsc95xx_mdio_write_nopm(dev, PHY_INT_MASK, ret); 1255 1256 return 0; 1257} 1258 1259static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1260{ 1261 int ret; 1262 1263 /* first, a dummy read, needed to latch some MII phys */ 1264 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1265 if (ret < 0) 1266 return ret; 1267 1268 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1269 if (ret < 0) 1270 return ret; 1271 1272 return !!(ret & BMSR_LSTATUS); 1273} 1274 1275static int smsc95xx_enter_suspend0(struct usbnet *dev) 1276{ 1277 struct smsc95xx_priv *pdata = dev->driver_priv; 1278 u32 val; 1279 int ret; 1280 1281 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1282 if (ret < 0) 1283 return ret; 1284 1285 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1286 val |= PM_CTL_SUS_MODE_0; 1287 1288 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1289 if (ret < 0) 1290 return ret; 1291 1292 /* clear wol status */ 1293 val &= ~PM_CTL_WUPS_; 1294 val |= PM_CTL_WUPS_WOL_; 1295 1296 /* enable energy detection */ 1297 if (pdata->wolopts & WAKE_PHY) 1298 val |= PM_CTL_WUPS_ED_; 1299 1300 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1301 if (ret < 0) 1302 return ret; 1303 1304 /* read back PM_CTRL */ 1305 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1306 if (ret < 0) 1307 return ret; 1308 1309 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1310 1311 return 0; 1312} 1313 1314static int smsc95xx_enter_suspend1(struct usbnet *dev) 1315{ 1316 struct smsc95xx_priv *pdata = dev->driver_priv; 1317 u32 val; 1318 int ret; 1319 1320 /* reconfigure link pulse detection timing for 1321 * compatibility with non-standard link partners 1322 */ 1323 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1324 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG, 1325 PHY_EDPD_CONFIG_DEFAULT); 1326 1327 /* enable energy detect power-down mode */ 1328 ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS); 1329 if (ret < 0) 1330 return ret; 1331 1332 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1333 1334 smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret); 1335 1336 /* enter SUSPEND1 mode */ 1337 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1338 if (ret < 0) 1339 return ret; 1340 1341 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1342 val |= PM_CTL_SUS_MODE_1; 1343 1344 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1345 if (ret < 0) 1346 return ret; 1347 1348 /* clear wol status, enable energy detection */ 1349 val &= ~PM_CTL_WUPS_; 1350 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1351 1352 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1353 if (ret < 0) 1354 return ret; 1355 1356 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1357 1358 return 0; 1359} 1360 1361static int smsc95xx_enter_suspend2(struct usbnet *dev) 1362{ 1363 struct smsc95xx_priv *pdata = dev->driver_priv; 1364 u32 val; 1365 int ret; 1366 1367 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1368 if (ret < 0) 1369 return ret; 1370 1371 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1372 val |= PM_CTL_SUS_MODE_2; 1373 1374 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1375 if (ret < 0) 1376 return ret; 1377 1378 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1379 1380 return 0; 1381} 1382 1383static int smsc95xx_enter_suspend3(struct usbnet *dev) 1384{ 1385 struct smsc95xx_priv *pdata = dev->driver_priv; 1386 u32 val; 1387 int ret; 1388 1389 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1390 if (ret < 0) 1391 return ret; 1392 1393 if (val & RX_FIFO_INF_USED_) { 1394 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1395 return -EBUSY; 1396 } 1397 1398 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1399 if (ret < 0) 1400 return ret; 1401 1402 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1403 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1404 1405 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1406 if (ret < 0) 1407 return ret; 1408 1409 /* clear wol status */ 1410 val &= ~PM_CTL_WUPS_; 1411 val |= PM_CTL_WUPS_WOL_; 1412 1413 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1414 if (ret < 0) 1415 return ret; 1416 1417 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1418 1419 return 0; 1420} 1421 1422static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1423{ 1424 struct smsc95xx_priv *pdata = dev->driver_priv; 1425 int ret; 1426 1427 if (!netif_running(dev->net)) { 1428 /* interface is ifconfig down so fully power down hw */ 1429 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1430 return smsc95xx_enter_suspend2(dev); 1431 } 1432 1433 if (!link_up) { 1434 /* link is down so enter EDPD mode, but only if device can 1435 * reliably resume from it. This check should be redundant 1436 * as current FEATURE_REMOTE_WAKEUP parts also support 1437 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1438 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1439 netdev_warn(dev->net, "EDPD not supported\n"); 1440 return -EBUSY; 1441 } 1442 1443 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1444 1445 /* enable PHY wakeup events for if cable is attached */ 1446 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1447 PHY_INT_MASK_ANEG_COMP_); 1448 if (ret < 0) { 1449 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1450 return ret; 1451 } 1452 1453 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1454 return smsc95xx_enter_suspend1(dev); 1455 } 1456 1457 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1458 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1459 PHY_INT_MASK_LINK_DOWN_); 1460 if (ret < 0) { 1461 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1462 return ret; 1463 } 1464 1465 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1466 return smsc95xx_enter_suspend3(dev); 1467} 1468 1469static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1470{ 1471 struct usbnet *dev = usb_get_intfdata(intf); 1472 struct smsc95xx_priv *pdata = dev->driver_priv; 1473 u32 val, link_up; 1474 int ret; 1475 1476 pdata->pm_task = current; 1477 1478 ret = usbnet_suspend(intf, message); 1479 if (ret < 0) { 1480 netdev_warn(dev->net, "usbnet_suspend error\n"); 1481 pdata->pm_task = NULL; 1482 return ret; 1483 } 1484 1485 if (pdata->suspend_flags) { 1486 netdev_warn(dev->net, "error during last resume\n"); 1487 pdata->suspend_flags = 0; 1488 } 1489 1490 /* determine if link is up using only _nopm functions */ 1491 link_up = smsc95xx_link_ok_nopm(dev); 1492 1493 if (message.event == PM_EVENT_AUTO_SUSPEND && 1494 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1495 ret = smsc95xx_autosuspend(dev, link_up); 1496 goto done; 1497 } 1498 1499 /* if we get this far we're not autosuspending */ 1500 /* if no wol options set, or if link is down and we're not waking on 1501 * PHY activity, enter lowest power SUSPEND2 mode 1502 */ 1503 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1504 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1505 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1506 1507 /* disable energy detect (link up) & wake up events */ 1508 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1509 if (ret < 0) 1510 goto done; 1511 1512 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1513 1514 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1515 if (ret < 0) 1516 goto done; 1517 1518 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1519 if (ret < 0) 1520 goto done; 1521 1522 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1523 1524 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1525 if (ret < 0) 1526 goto done; 1527 1528 ret = smsc95xx_enter_suspend2(dev); 1529 goto done; 1530 } 1531 1532 if (pdata->wolopts & WAKE_PHY) { 1533 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1534 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1535 if (ret < 0) { 1536 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1537 goto done; 1538 } 1539 1540 /* if link is down then configure EDPD and enter SUSPEND1, 1541 * otherwise enter SUSPEND0 below 1542 */ 1543 if (!link_up) { 1544 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1545 ret = smsc95xx_enter_suspend1(dev); 1546 goto done; 1547 } 1548 } 1549 1550 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1551 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1552 u32 command[2]; 1553 u32 offset[2]; 1554 u32 crc[4]; 1555 int wuff_filter_count = 1556 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1557 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1558 int i, filter = 0; 1559 1560 if (!filter_mask) { 1561 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1562 ret = -ENOMEM; 1563 goto done; 1564 } 1565 1566 memset(command, 0, sizeof(command)); 1567 memset(offset, 0, sizeof(offset)); 1568 memset(crc, 0, sizeof(crc)); 1569 1570 if (pdata->wolopts & WAKE_BCAST) { 1571 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1572 netdev_info(dev->net, "enabling broadcast detection\n"); 1573 filter_mask[filter * 4] = 0x003F; 1574 filter_mask[filter * 4 + 1] = 0x00; 1575 filter_mask[filter * 4 + 2] = 0x00; 1576 filter_mask[filter * 4 + 3] = 0x00; 1577 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1578 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1579 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1580 filter++; 1581 } 1582 1583 if (pdata->wolopts & WAKE_MCAST) { 1584 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1585 netdev_info(dev->net, "enabling multicast detection\n"); 1586 filter_mask[filter * 4] = 0x0007; 1587 filter_mask[filter * 4 + 1] = 0x00; 1588 filter_mask[filter * 4 + 2] = 0x00; 1589 filter_mask[filter * 4 + 3] = 0x00; 1590 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1591 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1592 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1593 filter++; 1594 } 1595 1596 if (pdata->wolopts & WAKE_ARP) { 1597 const u8 arp[] = {0x08, 0x06}; 1598 netdev_info(dev->net, "enabling ARP detection\n"); 1599 filter_mask[filter * 4] = 0x0003; 1600 filter_mask[filter * 4 + 1] = 0x00; 1601 filter_mask[filter * 4 + 2] = 0x00; 1602 filter_mask[filter * 4 + 3] = 0x00; 1603 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1604 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1605 crc[filter/2] |= smsc_crc(arp, 2, filter); 1606 filter++; 1607 } 1608 1609 if (pdata->wolopts & WAKE_UCAST) { 1610 netdev_info(dev->net, "enabling unicast detection\n"); 1611 filter_mask[filter * 4] = 0x003F; 1612 filter_mask[filter * 4 + 1] = 0x00; 1613 filter_mask[filter * 4 + 2] = 0x00; 1614 filter_mask[filter * 4 + 3] = 0x00; 1615 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1616 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1617 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1618 filter++; 1619 } 1620 1621 for (i = 0; i < (wuff_filter_count * 4); i++) { 1622 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1623 if (ret < 0) { 1624 kfree(filter_mask); 1625 goto done; 1626 } 1627 } 1628 kfree(filter_mask); 1629 1630 for (i = 0; i < (wuff_filter_count / 4); i++) { 1631 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1632 if (ret < 0) 1633 goto done; 1634 } 1635 1636 for (i = 0; i < (wuff_filter_count / 4); i++) { 1637 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1638 if (ret < 0) 1639 goto done; 1640 } 1641 1642 for (i = 0; i < (wuff_filter_count / 2); i++) { 1643 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1644 if (ret < 0) 1645 goto done; 1646 } 1647 1648 /* clear any pending pattern match packet status */ 1649 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1650 if (ret < 0) 1651 goto done; 1652 1653 val |= WUCSR_WUFR_; 1654 1655 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1656 if (ret < 0) 1657 goto done; 1658 } 1659 1660 if (pdata->wolopts & WAKE_MAGIC) { 1661 /* clear any pending magic packet status */ 1662 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1663 if (ret < 0) 1664 goto done; 1665 1666 val |= WUCSR_MPR_; 1667 1668 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1669 if (ret < 0) 1670 goto done; 1671 } 1672 1673 /* enable/disable wakeup sources */ 1674 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1675 if (ret < 0) 1676 goto done; 1677 1678 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1679 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1680 val |= WUCSR_WAKE_EN_; 1681 } else { 1682 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1683 val &= ~WUCSR_WAKE_EN_; 1684 } 1685 1686 if (pdata->wolopts & WAKE_MAGIC) { 1687 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1688 val |= WUCSR_MPEN_; 1689 } else { 1690 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1691 val &= ~WUCSR_MPEN_; 1692 } 1693 1694 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1695 if (ret < 0) 1696 goto done; 1697 1698 /* enable wol wakeup source */ 1699 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1700 if (ret < 0) 1701 goto done; 1702 1703 val |= PM_CTL_WOL_EN_; 1704 1705 /* phy energy detect wakeup source */ 1706 if (pdata->wolopts & WAKE_PHY) 1707 val |= PM_CTL_ED_EN_; 1708 1709 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1710 if (ret < 0) 1711 goto done; 1712 1713 /* enable receiver to enable frame reception */ 1714 smsc95xx_start_rx_path(dev, 1); 1715 1716 /* some wol options are enabled, so enter SUSPEND0 */ 1717 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1718 ret = smsc95xx_enter_suspend0(dev); 1719 1720done: 1721 /* 1722 * TODO: resume() might need to handle the suspend failure 1723 * in system sleep 1724 */ 1725 if (ret && PMSG_IS_AUTO(message)) 1726 usbnet_resume(intf); 1727 1728 pdata->pm_task = NULL; 1729 return ret; 1730} 1731 1732static int smsc95xx_resume(struct usb_interface *intf) 1733{ 1734 struct usbnet *dev = usb_get_intfdata(intf); 1735 struct smsc95xx_priv *pdata; 1736 u8 suspend_flags; 1737 int ret; 1738 u32 val; 1739 1740 BUG_ON(!dev); 1741 pdata = dev->driver_priv; 1742 suspend_flags = pdata->suspend_flags; 1743 1744 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1745 1746 /* do this first to ensure it's cleared even in error case */ 1747 pdata->suspend_flags = 0; 1748 1749 pdata->pm_task = current; 1750 1751 if (suspend_flags & SUSPEND_ALLMODES) { 1752 /* clear wake-up sources */ 1753 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1754 if (ret < 0) 1755 goto done; 1756 1757 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1758 1759 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1760 if (ret < 0) 1761 goto done; 1762 1763 /* clear wake-up status */ 1764 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1765 if (ret < 0) 1766 goto done; 1767 1768 val &= ~PM_CTL_WOL_EN_; 1769 val |= PM_CTL_WUPS_; 1770 1771 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1772 if (ret < 0) 1773 goto done; 1774 } 1775 1776 ret = usbnet_resume(intf); 1777 if (ret < 0) 1778 netdev_warn(dev->net, "usbnet_resume error\n"); 1779 1780 phy_init_hw(pdata->phydev); 1781 1782done: 1783 pdata->pm_task = NULL; 1784 return ret; 1785} 1786 1787static int smsc95xx_reset_resume(struct usb_interface *intf) 1788{ 1789 struct usbnet *dev = usb_get_intfdata(intf); 1790 struct smsc95xx_priv *pdata = dev->driver_priv; 1791 int ret; 1792 1793 pdata->pm_task = current; 1794 ret = smsc95xx_reset(dev); 1795 pdata->pm_task = NULL; 1796 if (ret < 0) 1797 return ret; 1798 1799 return smsc95xx_resume(intf); 1800} 1801 1802static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1803{ 1804 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1805 skb->ip_summed = CHECKSUM_COMPLETE; 1806 skb_trim(skb, skb->len - 2); 1807} 1808 1809static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1810{ 1811 /* This check is no longer done by usbnet */ 1812 if (skb->len < dev->net->hard_header_len) 1813 return 0; 1814 1815 while (skb->len > 0) { 1816 u32 header, align_count; 1817 struct sk_buff *ax_skb; 1818 unsigned char *packet; 1819 u16 size; 1820 1821 header = get_unaligned_le32(skb->data); 1822 skb_pull(skb, 4 + NET_IP_ALIGN); 1823 packet = skb->data; 1824 1825 /* get the packet length */ 1826 size = (u16)((header & RX_STS_FL_) >> 16); 1827 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1828 1829 if (unlikely(size > skb->len)) { 1830 netif_dbg(dev, rx_err, dev->net, 1831 "size err header=0x%08x\n", header); 1832 return 0; 1833 } 1834 1835 if (unlikely(header & RX_STS_ES_)) { 1836 netif_dbg(dev, rx_err, dev->net, 1837 "Error header=0x%08x\n", header); 1838 dev->net->stats.rx_errors++; 1839 dev->net->stats.rx_dropped++; 1840 1841 if (header & RX_STS_CRC_) { 1842 dev->net->stats.rx_crc_errors++; 1843 } else { 1844 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1845 dev->net->stats.rx_frame_errors++; 1846 1847 if ((header & RX_STS_LE_) && 1848 (!(header & RX_STS_FT_))) 1849 dev->net->stats.rx_length_errors++; 1850 } 1851 } else { 1852 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1853 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1854 netif_dbg(dev, rx_err, dev->net, 1855 "size err header=0x%08x\n", header); 1856 return 0; 1857 } 1858 1859 /* last frame in this batch */ 1860 if (skb->len == size) { 1861 if (dev->net->features & NETIF_F_RXCSUM) 1862 smsc95xx_rx_csum_offload(skb); 1863 skb_trim(skb, skb->len - 4); /* remove fcs */ 1864 skb->truesize = size + sizeof(struct sk_buff); 1865 1866 return 1; 1867 } 1868 1869 ax_skb = skb_clone(skb, GFP_ATOMIC); 1870 if (unlikely(!ax_skb)) { 1871 netdev_warn(dev->net, "Error allocating skb\n"); 1872 return 0; 1873 } 1874 1875 ax_skb->len = size; 1876 ax_skb->data = packet; 1877 skb_set_tail_pointer(ax_skb, size); 1878 1879 if (dev->net->features & NETIF_F_RXCSUM) 1880 smsc95xx_rx_csum_offload(ax_skb); 1881 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1882 ax_skb->truesize = size + sizeof(struct sk_buff); 1883 1884 usbnet_skb_return(dev, ax_skb); 1885 } 1886 1887 skb_pull(skb, size); 1888 1889 /* padding bytes before the next frame starts */ 1890 if (skb->len) 1891 skb_pull(skb, align_count); 1892 } 1893 1894 return 1; 1895} 1896 1897static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1898{ 1899 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1900 u16 high_16 = low_16 + skb->csum_offset; 1901 return (high_16 << 16) | low_16; 1902} 1903 1904/* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1905 * transmission. This is fairly unlikely, only seems to trigger with some 1906 * short TCP ACK packets sent. 1907 * 1908 * Note, this calculation should probably check for the alignment of the 1909 * data as well, but a straight check for csum being in the last four bytes 1910 * of the packet should be ok for now. 1911 */ 1912static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1913{ 1914 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1915 1916 if (skb->len <= 45) 1917 return false; 1918 return skb->csum_offset < (len - (4 + 1)); 1919} 1920 1921static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1922 struct sk_buff *skb, gfp_t flags) 1923{ 1924 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1925 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1926 u32 tx_cmd_a, tx_cmd_b; 1927 void *ptr; 1928 1929 /* We do not advertise SG, so skbs should be already linearized */ 1930 BUG_ON(skb_shinfo(skb)->nr_frags); 1931 1932 /* Make writable and expand header space by overhead if required */ 1933 if (skb_cow_head(skb, overhead)) { 1934 /* Must deallocate here as returning NULL to indicate error 1935 * means the skb won't be deallocated in the caller. 1936 */ 1937 dev_kfree_skb_any(skb); 1938 return NULL; 1939 } 1940 1941 tx_cmd_b = (u32)skb->len; 1942 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1943 1944 if (csum) { 1945 if (!smsc95xx_can_tx_checksum(skb)) { 1946 /* workaround - hardware tx checksum does not work 1947 * properly with extremely small packets */ 1948 long csstart = skb_checksum_start_offset(skb); 1949 __wsum calc = csum_partial(skb->data + csstart, 1950 skb->len - csstart, 0); 1951 *((__sum16 *)(skb->data + csstart 1952 + skb->csum_offset)) = csum_fold(calc); 1953 1954 csum = false; 1955 } else { 1956 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1957 ptr = skb_push(skb, 4); 1958 put_unaligned_le32(csum_preamble, ptr); 1959 1960 tx_cmd_a += 4; 1961 tx_cmd_b += 4; 1962 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1963 } 1964 } 1965 1966 ptr = skb_push(skb, 8); 1967 put_unaligned_le32(tx_cmd_a, ptr); 1968 put_unaligned_le32(tx_cmd_b, ptr+4); 1969 1970 return skb; 1971} 1972 1973static int smsc95xx_manage_power(struct usbnet *dev, int on) 1974{ 1975 struct smsc95xx_priv *pdata = dev->driver_priv; 1976 1977 dev->intf->needs_remote_wakeup = on; 1978 1979 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1980 return 0; 1981 1982 /* this chip revision isn't capable of remote wakeup */ 1983 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1984 1985 if (on) 1986 usb_autopm_get_interface_no_resume(dev->intf); 1987 else 1988 usb_autopm_put_interface(dev->intf); 1989 1990 return 0; 1991} 1992 1993static const struct driver_info smsc95xx_info = { 1994 .description = "smsc95xx USB 2.0 Ethernet", 1995 .bind = smsc95xx_bind, 1996 .unbind = smsc95xx_unbind, 1997 .reset = smsc95xx_reset, 1998 .check_connect = smsc95xx_start_phy, 1999 .stop = smsc95xx_stop, 2000 .rx_fixup = smsc95xx_rx_fixup, 2001 .tx_fixup = smsc95xx_tx_fixup, 2002 .status = smsc95xx_status, 2003 .manage_power = smsc95xx_manage_power, 2004 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2005}; 2006 2007static const struct usb_device_id products[] = { 2008 { 2009 /* SMSC9500 USB Ethernet Device */ 2010 USB_DEVICE(0x0424, 0x9500), 2011 .driver_info = (unsigned long) &smsc95xx_info, 2012 }, 2013 { 2014 /* SMSC9505 USB Ethernet Device */ 2015 USB_DEVICE(0x0424, 0x9505), 2016 .driver_info = (unsigned long) &smsc95xx_info, 2017 }, 2018 { 2019 /* SMSC9500A USB Ethernet Device */ 2020 USB_DEVICE(0x0424, 0x9E00), 2021 .driver_info = (unsigned long) &smsc95xx_info, 2022 }, 2023 { 2024 /* SMSC9505A USB Ethernet Device */ 2025 USB_DEVICE(0x0424, 0x9E01), 2026 .driver_info = (unsigned long) &smsc95xx_info, 2027 }, 2028 { 2029 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2030 USB_DEVICE(0x0424, 0xec00), 2031 .driver_info = (unsigned long) &smsc95xx_info, 2032 }, 2033 { 2034 /* SMSC9500 USB Ethernet Device (SAL10) */ 2035 USB_DEVICE(0x0424, 0x9900), 2036 .driver_info = (unsigned long) &smsc95xx_info, 2037 }, 2038 { 2039 /* SMSC9505 USB Ethernet Device (SAL10) */ 2040 USB_DEVICE(0x0424, 0x9901), 2041 .driver_info = (unsigned long) &smsc95xx_info, 2042 }, 2043 { 2044 /* SMSC9500A USB Ethernet Device (SAL10) */ 2045 USB_DEVICE(0x0424, 0x9902), 2046 .driver_info = (unsigned long) &smsc95xx_info, 2047 }, 2048 { 2049 /* SMSC9505A USB Ethernet Device (SAL10) */ 2050 USB_DEVICE(0x0424, 0x9903), 2051 .driver_info = (unsigned long) &smsc95xx_info, 2052 }, 2053 { 2054 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2055 USB_DEVICE(0x0424, 0x9904), 2056 .driver_info = (unsigned long) &smsc95xx_info, 2057 }, 2058 { 2059 /* SMSC9500A USB Ethernet Device (HAL) */ 2060 USB_DEVICE(0x0424, 0x9905), 2061 .driver_info = (unsigned long) &smsc95xx_info, 2062 }, 2063 { 2064 /* SMSC9505A USB Ethernet Device (HAL) */ 2065 USB_DEVICE(0x0424, 0x9906), 2066 .driver_info = (unsigned long) &smsc95xx_info, 2067 }, 2068 { 2069 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2070 USB_DEVICE(0x0424, 0x9907), 2071 .driver_info = (unsigned long) &smsc95xx_info, 2072 }, 2073 { 2074 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2075 USB_DEVICE(0x0424, 0x9908), 2076 .driver_info = (unsigned long) &smsc95xx_info, 2077 }, 2078 { 2079 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2080 USB_DEVICE(0x0424, 0x9909), 2081 .driver_info = (unsigned long) &smsc95xx_info, 2082 }, 2083 { 2084 /* SMSC LAN9530 USB Ethernet Device */ 2085 USB_DEVICE(0x0424, 0x9530), 2086 .driver_info = (unsigned long) &smsc95xx_info, 2087 }, 2088 { 2089 /* SMSC LAN9730 USB Ethernet Device */ 2090 USB_DEVICE(0x0424, 0x9730), 2091 .driver_info = (unsigned long) &smsc95xx_info, 2092 }, 2093 { 2094 /* SMSC LAN89530 USB Ethernet Device */ 2095 USB_DEVICE(0x0424, 0x9E08), 2096 .driver_info = (unsigned long) &smsc95xx_info, 2097 }, 2098 { }, /* END */ 2099}; 2100MODULE_DEVICE_TABLE(usb, products); 2101 2102static struct usb_driver smsc95xx_driver = { 2103 .name = "smsc95xx", 2104 .id_table = products, 2105 .probe = usbnet_probe, 2106 .suspend = smsc95xx_suspend, 2107 .resume = smsc95xx_resume, 2108 .reset_resume = smsc95xx_reset_resume, 2109 .disconnect = usbnet_disconnect, 2110 .disable_hub_initiated_lpm = 1, 2111 .supports_autosuspend = 1, 2112}; 2113 2114module_usb_driver(smsc95xx_driver); 2115 2116MODULE_AUTHOR("Nancy Lin"); 2117MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2118MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2119MODULE_LICENSE("GPL"); 2120