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 (!eth_platform_get_mac_address(&dev->udev->dev, 760 dev->net->dev_addr)) { 761 if (is_valid_ether_addr(dev->net->dev_addr)) { 762 /* device tree values are valid so use them */ 763 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 764 return; 765 } 766 } 767 768 /* try reading mac address from EEPROM */ 769 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 770 dev->net->dev_addr) == 0) { 771 if (is_valid_ether_addr(dev->net->dev_addr)) { 772 /* eeprom values are valid so use them */ 773 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 774 return; 775 } 776 } 777 778 /* no useful static MAC address found. generate a random one */ 779 eth_hw_addr_random(dev->net); 780 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 781 } 782 783 static int smsc95xx_set_mac_address(struct usbnet *dev) 784 { 785 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 786 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 787 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 788 int ret; 789 790 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 791 if (ret < 0) 792 return ret; 793 794 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 795 } 796 797 /* starts the TX path */ 798 static int smsc95xx_start_tx_path(struct usbnet *dev) 799 { 800 struct smsc95xx_priv *pdata = dev->driver_priv; 801 unsigned long flags; 802 int ret; 803 804 /* Enable Tx at MAC */ 805 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 806 pdata->mac_cr |= MAC_CR_TXEN_; 807 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 808 809 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 810 if (ret < 0) 811 return ret; 812 813 /* Enable Tx at SCSRs */ 814 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 815 } 816 817 /* Starts the Receive path */ 818 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 819 { 820 struct smsc95xx_priv *pdata = dev->driver_priv; 821 unsigned long flags; 822 823 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 824 pdata->mac_cr |= MAC_CR_RXEN_; 825 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 826 827 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 828 } 829 830 static int smsc95xx_reset(struct usbnet *dev) 831 { 832 struct smsc95xx_priv *pdata = dev->driver_priv; 833 u32 read_buf, write_buf, burst_cap; 834 int ret = 0, timeout; 835 836 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 837 838 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 839 if (ret < 0) 840 return ret; 841 842 timeout = 0; 843 do { 844 msleep(10); 845 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 846 if (ret < 0) 847 return ret; 848 timeout++; 849 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 850 851 if (timeout >= 100) { 852 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 853 return ret; 854 } 855 856 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 857 if (ret < 0) 858 return ret; 859 860 timeout = 0; 861 do { 862 msleep(10); 863 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 864 if (ret < 0) 865 return ret; 866 timeout++; 867 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 868 869 if (timeout >= 100) { 870 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 871 return ret; 872 } 873 874 ret = smsc95xx_set_mac_address(dev); 875 if (ret < 0) 876 return ret; 877 878 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 879 dev->net->dev_addr); 880 881 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 882 if (ret < 0) 883 return ret; 884 885 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 886 read_buf); 887 888 read_buf |= HW_CFG_BIR_; 889 890 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 891 if (ret < 0) 892 return ret; 893 894 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 895 if (ret < 0) 896 return ret; 897 898 netif_dbg(dev, ifup, dev->net, 899 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 900 read_buf); 901 902 if (!turbo_mode) { 903 burst_cap = 0; 904 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 905 } else if (dev->udev->speed == USB_SPEED_HIGH) { 906 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 907 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 908 } else { 909 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 910 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 911 } 912 913 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 914 (ulong)dev->rx_urb_size); 915 916 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 917 if (ret < 0) 918 return ret; 919 920 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 921 if (ret < 0) 922 return ret; 923 924 netif_dbg(dev, ifup, dev->net, 925 "Read Value from BURST_CAP after writing: 0x%08x\n", 926 read_buf); 927 928 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 929 if (ret < 0) 930 return ret; 931 932 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 933 if (ret < 0) 934 return ret; 935 936 netif_dbg(dev, ifup, dev->net, 937 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 938 read_buf); 939 940 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 941 if (ret < 0) 942 return ret; 943 944 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 945 read_buf); 946 947 if (turbo_mode) 948 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 949 950 read_buf &= ~HW_CFG_RXDOFF_; 951 952 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 953 read_buf |= NET_IP_ALIGN << 9; 954 955 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 956 if (ret < 0) 957 return ret; 958 959 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 960 if (ret < 0) 961 return ret; 962 963 netif_dbg(dev, ifup, dev->net, 964 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 965 966 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 967 if (ret < 0) 968 return ret; 969 970 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 971 if (ret < 0) 972 return ret; 973 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 974 975 /* Configure GPIO pins as LED outputs */ 976 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 977 LED_GPIO_CFG_FDX_LED; 978 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 979 if (ret < 0) 980 return ret; 981 982 /* Init Tx */ 983 ret = smsc95xx_write_reg(dev, FLOW, 0); 984 if (ret < 0) 985 return ret; 986 987 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 988 if (ret < 0) 989 return ret; 990 991 /* Don't need mac_cr_lock during initialisation */ 992 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 993 if (ret < 0) 994 return ret; 995 996 /* Init Rx */ 997 /* Set Vlan */ 998 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 999 if (ret < 0) 1000 return ret; 1001 1002 /* Enable or disable checksum offload engines */ 1003 ret = smsc95xx_set_features(dev->net, dev->net->features); 1004 if (ret < 0) { 1005 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1006 return ret; 1007 } 1008 1009 smsc95xx_set_multicast(dev->net); 1010 1011 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1012 if (ret < 0) 1013 return ret; 1014 1015 /* enable PHY interrupts */ 1016 read_buf |= INT_EP_CTL_PHY_INT_; 1017 1018 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1019 if (ret < 0) 1020 return ret; 1021 1022 ret = smsc95xx_start_tx_path(dev); 1023 if (ret < 0) { 1024 netdev_warn(dev->net, "Failed to start TX path\n"); 1025 return ret; 1026 } 1027 1028 ret = smsc95xx_start_rx_path(dev, 0); 1029 if (ret < 0) { 1030 netdev_warn(dev->net, "Failed to start RX path\n"); 1031 return ret; 1032 } 1033 1034 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1035 return 0; 1036 } 1037 1038 static const struct net_device_ops smsc95xx_netdev_ops = { 1039 .ndo_open = usbnet_open, 1040 .ndo_stop = usbnet_stop, 1041 .ndo_start_xmit = usbnet_start_xmit, 1042 .ndo_tx_timeout = usbnet_tx_timeout, 1043 .ndo_change_mtu = usbnet_change_mtu, 1044 .ndo_get_stats64 = dev_get_tstats64, 1045 .ndo_set_mac_address = eth_mac_addr, 1046 .ndo_validate_addr = eth_validate_addr, 1047 .ndo_do_ioctl = smsc95xx_ioctl, 1048 .ndo_set_rx_mode = smsc95xx_set_multicast, 1049 .ndo_set_features = smsc95xx_set_features, 1050 }; 1051 1052 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1053 { 1054 struct smsc95xx_priv *pdata; 1055 bool is_internal_phy; 1056 u32 val; 1057 int ret; 1058 1059 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1060 1061 ret = usbnet_get_endpoints(dev, intf); 1062 if (ret < 0) { 1063 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1064 return ret; 1065 } 1066 1067 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1068 if (!pdata) 1069 return -ENOMEM; 1070 1071 dev->driver_priv = pdata; 1072 1073 spin_lock_init(&pdata->mac_cr_lock); 1074 1075 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1076 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1077 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1078 * it is transmitted as all ones. The zero transmitted checksum means 1079 * transmitter generated no checksum. Hence, enable csum offload only 1080 * for ipv4 packets. 1081 */ 1082 if (DEFAULT_TX_CSUM_ENABLE) 1083 dev->net->features |= NETIF_F_IP_CSUM; 1084 if (DEFAULT_RX_CSUM_ENABLE) 1085 dev->net->features |= NETIF_F_RXCSUM; 1086 1087 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1088 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1089 1090 smsc95xx_init_mac_address(dev); 1091 1092 /* Init all registers */ 1093 ret = smsc95xx_reset(dev); 1094 if (ret) 1095 goto free_pdata; 1096 1097 pdata->mdiobus = mdiobus_alloc(); 1098 if (!pdata->mdiobus) { 1099 ret = -ENOMEM; 1100 goto free_pdata; 1101 } 1102 1103 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1104 if (ret < 0) 1105 goto free_mdio; 1106 1107 is_internal_phy = !(val & HW_CFG_PSEL_); 1108 if (is_internal_phy) 1109 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1110 1111 pdata->mdiobus->priv = dev; 1112 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1113 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1114 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1115 pdata->mdiobus->parent = &dev->udev->dev; 1116 1117 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1118 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1119 1120 ret = mdiobus_register(pdata->mdiobus); 1121 if (ret) { 1122 netdev_err(dev->net, "Could not register MDIO bus\n"); 1123 goto free_mdio; 1124 } 1125 1126 pdata->phydev = phy_find_first(pdata->mdiobus); 1127 if (!pdata->phydev) { 1128 netdev_err(dev->net, "no PHY found\n"); 1129 ret = -ENODEV; 1130 goto unregister_mdio; 1131 } 1132 1133 pdata->phydev->is_internal = is_internal_phy; 1134 1135 /* detect device revision as different features may be available */ 1136 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1137 if (ret < 0) 1138 goto unregister_mdio; 1139 1140 val >>= 16; 1141 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1142 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1143 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1144 FEATURE_PHY_NLP_CROSSOVER | 1145 FEATURE_REMOTE_WAKEUP); 1146 else if (val == ID_REV_CHIP_ID_9512_) 1147 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1148 1149 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1150 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1151 dev->net->flags |= IFF_MULTICAST; 1152 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1153 dev->net->min_mtu = ETH_MIN_MTU; 1154 dev->net->max_mtu = ETH_DATA_LEN; 1155 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1156 return 0; 1157 1158 unregister_mdio: 1159 mdiobus_unregister(pdata->mdiobus); 1160 1161 free_mdio: 1162 mdiobus_free(pdata->mdiobus); 1163 1164 free_pdata: 1165 kfree(pdata); 1166 return ret; 1167 } 1168 1169 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1170 { 1171 struct smsc95xx_priv *pdata = dev->driver_priv; 1172 1173 mdiobus_unregister(pdata->mdiobus); 1174 mdiobus_free(pdata->mdiobus); 1175 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1176 kfree(pdata); 1177 } 1178 1179 static void smsc95xx_handle_link_change(struct net_device *net) 1180 { 1181 phy_print_status(net->phydev); 1182 } 1183 1184 static int smsc95xx_start_phy(struct usbnet *dev) 1185 { 1186 struct smsc95xx_priv *pdata = dev->driver_priv; 1187 struct net_device *net = dev->net; 1188 int ret; 1189 1190 ret = smsc95xx_reset(dev); 1191 if (ret < 0) 1192 return ret; 1193 1194 ret = phy_connect_direct(net, pdata->phydev, 1195 &smsc95xx_handle_link_change, 1196 PHY_INTERFACE_MODE_MII); 1197 if (ret) { 1198 netdev_err(net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1199 return ret; 1200 } 1201 1202 phy_attached_info(net->phydev); 1203 phy_start(net->phydev); 1204 return 0; 1205 } 1206 1207 static int smsc95xx_disconnect_phy(struct usbnet *dev) 1208 { 1209 phy_stop(dev->net->phydev); 1210 phy_disconnect(dev->net->phydev); 1211 return 0; 1212 } 1213 1214 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1215 { 1216 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1217 return crc << ((filter % 2) * 16); 1218 } 1219 1220 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1221 { 1222 int ret; 1223 1224 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1225 1226 /* read to clear */ 1227 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_SRC); 1228 if (ret < 0) 1229 return ret; 1230 1231 /* enable interrupt source */ 1232 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_MASK); 1233 if (ret < 0) 1234 return ret; 1235 1236 ret |= mask; 1237 1238 smsc95xx_mdio_write_nopm(dev, PHY_INT_MASK, ret); 1239 1240 return 0; 1241 } 1242 1243 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1244 { 1245 int ret; 1246 1247 /* first, a dummy read, needed to latch some MII phys */ 1248 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1249 if (ret < 0) 1250 return ret; 1251 1252 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1253 if (ret < 0) 1254 return ret; 1255 1256 return !!(ret & BMSR_LSTATUS); 1257 } 1258 1259 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1260 { 1261 struct smsc95xx_priv *pdata = dev->driver_priv; 1262 u32 val; 1263 int ret; 1264 1265 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1266 if (ret < 0) 1267 return ret; 1268 1269 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1270 val |= PM_CTL_SUS_MODE_0; 1271 1272 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1273 if (ret < 0) 1274 return ret; 1275 1276 /* clear wol status */ 1277 val &= ~PM_CTL_WUPS_; 1278 val |= PM_CTL_WUPS_WOL_; 1279 1280 /* enable energy detection */ 1281 if (pdata->wolopts & WAKE_PHY) 1282 val |= PM_CTL_WUPS_ED_; 1283 1284 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1285 if (ret < 0) 1286 return ret; 1287 1288 /* read back PM_CTRL */ 1289 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1290 if (ret < 0) 1291 return ret; 1292 1293 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1294 1295 return 0; 1296 } 1297 1298 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1299 { 1300 struct smsc95xx_priv *pdata = dev->driver_priv; 1301 u32 val; 1302 int ret; 1303 1304 /* reconfigure link pulse detection timing for 1305 * compatibility with non-standard link partners 1306 */ 1307 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1308 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG, 1309 PHY_EDPD_CONFIG_DEFAULT); 1310 1311 /* enable energy detect power-down mode */ 1312 ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS); 1313 if (ret < 0) 1314 return ret; 1315 1316 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1317 1318 smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret); 1319 1320 /* enter SUSPEND1 mode */ 1321 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1322 if (ret < 0) 1323 return ret; 1324 1325 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1326 val |= PM_CTL_SUS_MODE_1; 1327 1328 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1329 if (ret < 0) 1330 return ret; 1331 1332 /* clear wol status, enable energy detection */ 1333 val &= ~PM_CTL_WUPS_; 1334 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1335 1336 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1337 if (ret < 0) 1338 return ret; 1339 1340 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1341 1342 return 0; 1343 } 1344 1345 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1346 { 1347 struct smsc95xx_priv *pdata = dev->driver_priv; 1348 u32 val; 1349 int ret; 1350 1351 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1352 if (ret < 0) 1353 return ret; 1354 1355 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1356 val |= PM_CTL_SUS_MODE_2; 1357 1358 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1359 if (ret < 0) 1360 return ret; 1361 1362 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1363 1364 return 0; 1365 } 1366 1367 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1368 { 1369 struct smsc95xx_priv *pdata = dev->driver_priv; 1370 u32 val; 1371 int ret; 1372 1373 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1374 if (ret < 0) 1375 return ret; 1376 1377 if (val & RX_FIFO_INF_USED_) { 1378 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1379 return -EBUSY; 1380 } 1381 1382 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1383 if (ret < 0) 1384 return ret; 1385 1386 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1387 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1388 1389 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1390 if (ret < 0) 1391 return ret; 1392 1393 /* clear wol status */ 1394 val &= ~PM_CTL_WUPS_; 1395 val |= PM_CTL_WUPS_WOL_; 1396 1397 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1398 if (ret < 0) 1399 return ret; 1400 1401 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1402 1403 return 0; 1404 } 1405 1406 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1407 { 1408 struct smsc95xx_priv *pdata = dev->driver_priv; 1409 int ret; 1410 1411 if (!netif_running(dev->net)) { 1412 /* interface is ifconfig down so fully power down hw */ 1413 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1414 return smsc95xx_enter_suspend2(dev); 1415 } 1416 1417 if (!link_up) { 1418 /* link is down so enter EDPD mode, but only if device can 1419 * reliably resume from it. This check should be redundant 1420 * as current FEATURE_REMOTE_WAKEUP parts also support 1421 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1422 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1423 netdev_warn(dev->net, "EDPD not supported\n"); 1424 return -EBUSY; 1425 } 1426 1427 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1428 1429 /* enable PHY wakeup events for if cable is attached */ 1430 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1431 PHY_INT_MASK_ANEG_COMP_); 1432 if (ret < 0) { 1433 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1434 return ret; 1435 } 1436 1437 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1438 return smsc95xx_enter_suspend1(dev); 1439 } 1440 1441 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1442 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1443 PHY_INT_MASK_LINK_DOWN_); 1444 if (ret < 0) { 1445 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1446 return ret; 1447 } 1448 1449 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1450 return smsc95xx_enter_suspend3(dev); 1451 } 1452 1453 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1454 { 1455 struct usbnet *dev = usb_get_intfdata(intf); 1456 struct smsc95xx_priv *pdata = dev->driver_priv; 1457 u32 val, link_up; 1458 int ret; 1459 1460 ret = usbnet_suspend(intf, message); 1461 if (ret < 0) { 1462 netdev_warn(dev->net, "usbnet_suspend error\n"); 1463 return ret; 1464 } 1465 1466 if (pdata->suspend_flags) { 1467 netdev_warn(dev->net, "error during last resume\n"); 1468 pdata->suspend_flags = 0; 1469 } 1470 1471 /* determine if link is up using only _nopm functions */ 1472 link_up = smsc95xx_link_ok_nopm(dev); 1473 1474 if (message.event == PM_EVENT_AUTO_SUSPEND && 1475 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1476 ret = smsc95xx_autosuspend(dev, link_up); 1477 goto done; 1478 } 1479 1480 /* if we get this far we're not autosuspending */ 1481 /* if no wol options set, or if link is down and we're not waking on 1482 * PHY activity, enter lowest power SUSPEND2 mode 1483 */ 1484 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1485 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1486 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1487 1488 /* disable energy detect (link up) & wake up events */ 1489 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1490 if (ret < 0) 1491 goto done; 1492 1493 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1494 1495 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1496 if (ret < 0) 1497 goto done; 1498 1499 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1500 if (ret < 0) 1501 goto done; 1502 1503 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1504 1505 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1506 if (ret < 0) 1507 goto done; 1508 1509 ret = smsc95xx_enter_suspend2(dev); 1510 goto done; 1511 } 1512 1513 if (pdata->wolopts & WAKE_PHY) { 1514 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1515 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1516 if (ret < 0) { 1517 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1518 goto done; 1519 } 1520 1521 /* if link is down then configure EDPD and enter SUSPEND1, 1522 * otherwise enter SUSPEND0 below 1523 */ 1524 if (!link_up) { 1525 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1526 ret = smsc95xx_enter_suspend1(dev); 1527 goto done; 1528 } 1529 } 1530 1531 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1532 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1533 u32 command[2]; 1534 u32 offset[2]; 1535 u32 crc[4]; 1536 int wuff_filter_count = 1537 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1538 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1539 int i, filter = 0; 1540 1541 if (!filter_mask) { 1542 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1543 ret = -ENOMEM; 1544 goto done; 1545 } 1546 1547 memset(command, 0, sizeof(command)); 1548 memset(offset, 0, sizeof(offset)); 1549 memset(crc, 0, sizeof(crc)); 1550 1551 if (pdata->wolopts & WAKE_BCAST) { 1552 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1553 netdev_info(dev->net, "enabling broadcast detection\n"); 1554 filter_mask[filter * 4] = 0x003F; 1555 filter_mask[filter * 4 + 1] = 0x00; 1556 filter_mask[filter * 4 + 2] = 0x00; 1557 filter_mask[filter * 4 + 3] = 0x00; 1558 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1559 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1560 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1561 filter++; 1562 } 1563 1564 if (pdata->wolopts & WAKE_MCAST) { 1565 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1566 netdev_info(dev->net, "enabling multicast detection\n"); 1567 filter_mask[filter * 4] = 0x0007; 1568 filter_mask[filter * 4 + 1] = 0x00; 1569 filter_mask[filter * 4 + 2] = 0x00; 1570 filter_mask[filter * 4 + 3] = 0x00; 1571 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1572 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1573 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1574 filter++; 1575 } 1576 1577 if (pdata->wolopts & WAKE_ARP) { 1578 const u8 arp[] = {0x08, 0x06}; 1579 netdev_info(dev->net, "enabling ARP detection\n"); 1580 filter_mask[filter * 4] = 0x0003; 1581 filter_mask[filter * 4 + 1] = 0x00; 1582 filter_mask[filter * 4 + 2] = 0x00; 1583 filter_mask[filter * 4 + 3] = 0x00; 1584 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1585 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1586 crc[filter/2] |= smsc_crc(arp, 2, filter); 1587 filter++; 1588 } 1589 1590 if (pdata->wolopts & WAKE_UCAST) { 1591 netdev_info(dev->net, "enabling unicast detection\n"); 1592 filter_mask[filter * 4] = 0x003F; 1593 filter_mask[filter * 4 + 1] = 0x00; 1594 filter_mask[filter * 4 + 2] = 0x00; 1595 filter_mask[filter * 4 + 3] = 0x00; 1596 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1597 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1598 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1599 filter++; 1600 } 1601 1602 for (i = 0; i < (wuff_filter_count * 4); i++) { 1603 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1604 if (ret < 0) { 1605 kfree(filter_mask); 1606 goto done; 1607 } 1608 } 1609 kfree(filter_mask); 1610 1611 for (i = 0; i < (wuff_filter_count / 4); i++) { 1612 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1613 if (ret < 0) 1614 goto done; 1615 } 1616 1617 for (i = 0; i < (wuff_filter_count / 4); i++) { 1618 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1619 if (ret < 0) 1620 goto done; 1621 } 1622 1623 for (i = 0; i < (wuff_filter_count / 2); i++) { 1624 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1625 if (ret < 0) 1626 goto done; 1627 } 1628 1629 /* clear any pending pattern match packet status */ 1630 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1631 if (ret < 0) 1632 goto done; 1633 1634 val |= WUCSR_WUFR_; 1635 1636 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1637 if (ret < 0) 1638 goto done; 1639 } 1640 1641 if (pdata->wolopts & WAKE_MAGIC) { 1642 /* clear any pending magic packet status */ 1643 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1644 if (ret < 0) 1645 goto done; 1646 1647 val |= WUCSR_MPR_; 1648 1649 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1650 if (ret < 0) 1651 goto done; 1652 } 1653 1654 /* enable/disable wakeup sources */ 1655 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1656 if (ret < 0) 1657 goto done; 1658 1659 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1660 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1661 val |= WUCSR_WAKE_EN_; 1662 } else { 1663 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1664 val &= ~WUCSR_WAKE_EN_; 1665 } 1666 1667 if (pdata->wolopts & WAKE_MAGIC) { 1668 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1669 val |= WUCSR_MPEN_; 1670 } else { 1671 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1672 val &= ~WUCSR_MPEN_; 1673 } 1674 1675 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1676 if (ret < 0) 1677 goto done; 1678 1679 /* enable wol wakeup source */ 1680 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1681 if (ret < 0) 1682 goto done; 1683 1684 val |= PM_CTL_WOL_EN_; 1685 1686 /* phy energy detect wakeup source */ 1687 if (pdata->wolopts & WAKE_PHY) 1688 val |= PM_CTL_ED_EN_; 1689 1690 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1691 if (ret < 0) 1692 goto done; 1693 1694 /* enable receiver to enable frame reception */ 1695 smsc95xx_start_rx_path(dev, 1); 1696 1697 /* some wol options are enabled, so enter SUSPEND0 */ 1698 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1699 ret = smsc95xx_enter_suspend0(dev); 1700 1701 done: 1702 /* 1703 * TODO: resume() might need to handle the suspend failure 1704 * in system sleep 1705 */ 1706 if (ret && PMSG_IS_AUTO(message)) 1707 usbnet_resume(intf); 1708 1709 return ret; 1710 } 1711 1712 static int smsc95xx_resume(struct usb_interface *intf) 1713 { 1714 struct usbnet *dev = usb_get_intfdata(intf); 1715 struct smsc95xx_priv *pdata; 1716 u8 suspend_flags; 1717 int ret; 1718 u32 val; 1719 1720 BUG_ON(!dev); 1721 pdata = dev->driver_priv; 1722 suspend_flags = pdata->suspend_flags; 1723 1724 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1725 1726 /* do this first to ensure it's cleared even in error case */ 1727 pdata->suspend_flags = 0; 1728 1729 if (suspend_flags & SUSPEND_ALLMODES) { 1730 /* clear wake-up sources */ 1731 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1732 if (ret < 0) 1733 return ret; 1734 1735 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1736 1737 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1738 if (ret < 0) 1739 return ret; 1740 1741 /* clear wake-up status */ 1742 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1743 if (ret < 0) 1744 return ret; 1745 1746 val &= ~PM_CTL_WOL_EN_; 1747 val |= PM_CTL_WUPS_; 1748 1749 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1750 if (ret < 0) 1751 return ret; 1752 } 1753 1754 ret = usbnet_resume(intf); 1755 if (ret < 0) 1756 netdev_warn(dev->net, "usbnet_resume error\n"); 1757 1758 phy_init_hw(pdata->phydev); 1759 return ret; 1760 } 1761 1762 static int smsc95xx_reset_resume(struct usb_interface *intf) 1763 { 1764 struct usbnet *dev = usb_get_intfdata(intf); 1765 int ret; 1766 1767 ret = smsc95xx_reset(dev); 1768 if (ret < 0) 1769 return ret; 1770 1771 return smsc95xx_resume(intf); 1772 } 1773 1774 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1775 { 1776 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1777 skb->ip_summed = CHECKSUM_COMPLETE; 1778 skb_trim(skb, skb->len - 2); 1779 } 1780 1781 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1782 { 1783 /* This check is no longer done by usbnet */ 1784 if (skb->len < dev->net->hard_header_len) 1785 return 0; 1786 1787 while (skb->len > 0) { 1788 u32 header, align_count; 1789 struct sk_buff *ax_skb; 1790 unsigned char *packet; 1791 u16 size; 1792 1793 header = get_unaligned_le32(skb->data); 1794 skb_pull(skb, 4 + NET_IP_ALIGN); 1795 packet = skb->data; 1796 1797 /* get the packet length */ 1798 size = (u16)((header & RX_STS_FL_) >> 16); 1799 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1800 1801 if (unlikely(header & RX_STS_ES_)) { 1802 netif_dbg(dev, rx_err, dev->net, 1803 "Error header=0x%08x\n", header); 1804 dev->net->stats.rx_errors++; 1805 dev->net->stats.rx_dropped++; 1806 1807 if (header & RX_STS_CRC_) { 1808 dev->net->stats.rx_crc_errors++; 1809 } else { 1810 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1811 dev->net->stats.rx_frame_errors++; 1812 1813 if ((header & RX_STS_LE_) && 1814 (!(header & RX_STS_FT_))) 1815 dev->net->stats.rx_length_errors++; 1816 } 1817 } else { 1818 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1819 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1820 netif_dbg(dev, rx_err, dev->net, 1821 "size err header=0x%08x\n", header); 1822 return 0; 1823 } 1824 1825 /* last frame in this batch */ 1826 if (skb->len == size) { 1827 if (dev->net->features & NETIF_F_RXCSUM) 1828 smsc95xx_rx_csum_offload(skb); 1829 skb_trim(skb, skb->len - 4); /* remove fcs */ 1830 skb->truesize = size + sizeof(struct sk_buff); 1831 1832 return 1; 1833 } 1834 1835 ax_skb = skb_clone(skb, GFP_ATOMIC); 1836 if (unlikely(!ax_skb)) { 1837 netdev_warn(dev->net, "Error allocating skb\n"); 1838 return 0; 1839 } 1840 1841 ax_skb->len = size; 1842 ax_skb->data = packet; 1843 skb_set_tail_pointer(ax_skb, size); 1844 1845 if (dev->net->features & NETIF_F_RXCSUM) 1846 smsc95xx_rx_csum_offload(ax_skb); 1847 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1848 ax_skb->truesize = size + sizeof(struct sk_buff); 1849 1850 usbnet_skb_return(dev, ax_skb); 1851 } 1852 1853 skb_pull(skb, size); 1854 1855 /* padding bytes before the next frame starts */ 1856 if (skb->len) 1857 skb_pull(skb, align_count); 1858 } 1859 1860 return 1; 1861 } 1862 1863 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1864 { 1865 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1866 u16 high_16 = low_16 + skb->csum_offset; 1867 return (high_16 << 16) | low_16; 1868 } 1869 1870 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1871 * transmission. This is fairly unlikely, only seems to trigger with some 1872 * short TCP ACK packets sent. 1873 * 1874 * Note, this calculation should probably check for the alignment of the 1875 * data as well, but a straight check for csum being in the last four bytes 1876 * of the packet should be ok for now. 1877 */ 1878 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1879 { 1880 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1881 1882 if (skb->len <= 45) 1883 return false; 1884 return skb->csum_offset < (len - (4 + 1)); 1885 } 1886 1887 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1888 struct sk_buff *skb, gfp_t flags) 1889 { 1890 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1891 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1892 u32 tx_cmd_a, tx_cmd_b; 1893 void *ptr; 1894 1895 /* We do not advertise SG, so skbs should be already linearized */ 1896 BUG_ON(skb_shinfo(skb)->nr_frags); 1897 1898 /* Make writable and expand header space by overhead if required */ 1899 if (skb_cow_head(skb, overhead)) { 1900 /* Must deallocate here as returning NULL to indicate error 1901 * means the skb won't be deallocated in the caller. 1902 */ 1903 dev_kfree_skb_any(skb); 1904 return NULL; 1905 } 1906 1907 tx_cmd_b = (u32)skb->len; 1908 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1909 1910 if (csum) { 1911 if (!smsc95xx_can_tx_checksum(skb)) { 1912 /* workaround - hardware tx checksum does not work 1913 * properly with extremely small packets */ 1914 long csstart = skb_checksum_start_offset(skb); 1915 __wsum calc = csum_partial(skb->data + csstart, 1916 skb->len - csstart, 0); 1917 *((__sum16 *)(skb->data + csstart 1918 + skb->csum_offset)) = csum_fold(calc); 1919 1920 csum = false; 1921 } else { 1922 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1923 ptr = skb_push(skb, 4); 1924 put_unaligned_le32(csum_preamble, ptr); 1925 1926 tx_cmd_a += 4; 1927 tx_cmd_b += 4; 1928 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1929 } 1930 } 1931 1932 ptr = skb_push(skb, 8); 1933 put_unaligned_le32(tx_cmd_a, ptr); 1934 put_unaligned_le32(tx_cmd_b, ptr+4); 1935 1936 return skb; 1937 } 1938 1939 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1940 { 1941 struct smsc95xx_priv *pdata = dev->driver_priv; 1942 1943 dev->intf->needs_remote_wakeup = on; 1944 1945 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1946 return 0; 1947 1948 /* this chip revision isn't capable of remote wakeup */ 1949 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1950 1951 if (on) 1952 usb_autopm_get_interface_no_resume(dev->intf); 1953 else 1954 usb_autopm_put_interface(dev->intf); 1955 1956 return 0; 1957 } 1958 1959 static const struct driver_info smsc95xx_info = { 1960 .description = "smsc95xx USB 2.0 Ethernet", 1961 .bind = smsc95xx_bind, 1962 .unbind = smsc95xx_unbind, 1963 .link_reset = smsc95xx_link_reset, 1964 .reset = smsc95xx_start_phy, 1965 .stop = smsc95xx_disconnect_phy, 1966 .rx_fixup = smsc95xx_rx_fixup, 1967 .tx_fixup = smsc95xx_tx_fixup, 1968 .status = smsc95xx_status, 1969 .manage_power = smsc95xx_manage_power, 1970 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 1971 }; 1972 1973 static const struct usb_device_id products[] = { 1974 { 1975 /* SMSC9500 USB Ethernet Device */ 1976 USB_DEVICE(0x0424, 0x9500), 1977 .driver_info = (unsigned long) &smsc95xx_info, 1978 }, 1979 { 1980 /* SMSC9505 USB Ethernet Device */ 1981 USB_DEVICE(0x0424, 0x9505), 1982 .driver_info = (unsigned long) &smsc95xx_info, 1983 }, 1984 { 1985 /* SMSC9500A USB Ethernet Device */ 1986 USB_DEVICE(0x0424, 0x9E00), 1987 .driver_info = (unsigned long) &smsc95xx_info, 1988 }, 1989 { 1990 /* SMSC9505A USB Ethernet Device */ 1991 USB_DEVICE(0x0424, 0x9E01), 1992 .driver_info = (unsigned long) &smsc95xx_info, 1993 }, 1994 { 1995 /* SMSC9512/9514 USB Hub & Ethernet Device */ 1996 USB_DEVICE(0x0424, 0xec00), 1997 .driver_info = (unsigned long) &smsc95xx_info, 1998 }, 1999 { 2000 /* SMSC9500 USB Ethernet Device (SAL10) */ 2001 USB_DEVICE(0x0424, 0x9900), 2002 .driver_info = (unsigned long) &smsc95xx_info, 2003 }, 2004 { 2005 /* SMSC9505 USB Ethernet Device (SAL10) */ 2006 USB_DEVICE(0x0424, 0x9901), 2007 .driver_info = (unsigned long) &smsc95xx_info, 2008 }, 2009 { 2010 /* SMSC9500A USB Ethernet Device (SAL10) */ 2011 USB_DEVICE(0x0424, 0x9902), 2012 .driver_info = (unsigned long) &smsc95xx_info, 2013 }, 2014 { 2015 /* SMSC9505A USB Ethernet Device (SAL10) */ 2016 USB_DEVICE(0x0424, 0x9903), 2017 .driver_info = (unsigned long) &smsc95xx_info, 2018 }, 2019 { 2020 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2021 USB_DEVICE(0x0424, 0x9904), 2022 .driver_info = (unsigned long) &smsc95xx_info, 2023 }, 2024 { 2025 /* SMSC9500A USB Ethernet Device (HAL) */ 2026 USB_DEVICE(0x0424, 0x9905), 2027 .driver_info = (unsigned long) &smsc95xx_info, 2028 }, 2029 { 2030 /* SMSC9505A USB Ethernet Device (HAL) */ 2031 USB_DEVICE(0x0424, 0x9906), 2032 .driver_info = (unsigned long) &smsc95xx_info, 2033 }, 2034 { 2035 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2036 USB_DEVICE(0x0424, 0x9907), 2037 .driver_info = (unsigned long) &smsc95xx_info, 2038 }, 2039 { 2040 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2041 USB_DEVICE(0x0424, 0x9908), 2042 .driver_info = (unsigned long) &smsc95xx_info, 2043 }, 2044 { 2045 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2046 USB_DEVICE(0x0424, 0x9909), 2047 .driver_info = (unsigned long) &smsc95xx_info, 2048 }, 2049 { 2050 /* SMSC LAN9530 USB Ethernet Device */ 2051 USB_DEVICE(0x0424, 0x9530), 2052 .driver_info = (unsigned long) &smsc95xx_info, 2053 }, 2054 { 2055 /* SMSC LAN9730 USB Ethernet Device */ 2056 USB_DEVICE(0x0424, 0x9730), 2057 .driver_info = (unsigned long) &smsc95xx_info, 2058 }, 2059 { 2060 /* SMSC LAN89530 USB Ethernet Device */ 2061 USB_DEVICE(0x0424, 0x9E08), 2062 .driver_info = (unsigned long) &smsc95xx_info, 2063 }, 2064 { }, /* END */ 2065 }; 2066 MODULE_DEVICE_TABLE(usb, products); 2067 2068 static struct usb_driver smsc95xx_driver = { 2069 .name = "smsc95xx", 2070 .id_table = products, 2071 .probe = usbnet_probe, 2072 .suspend = smsc95xx_suspend, 2073 .resume = smsc95xx_resume, 2074 .reset_resume = smsc95xx_reset_resume, 2075 .disconnect = usbnet_disconnect, 2076 .disable_hub_initiated_lpm = 1, 2077 .supports_autosuspend = 1, 2078 }; 2079 2080 module_usb_driver(smsc95xx_driver); 2081 2082 MODULE_AUTHOR("Nancy Lin"); 2083 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2084 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2085 MODULE_LICENSE("GPL"); 2086