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 u8 addr[ETH_ALEN]; 759 760 /* maybe the boot loader passed the MAC address in devicetree */ 761 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 762 if (is_valid_ether_addr(dev->net->dev_addr)) { 763 /* device tree values are valid so use them */ 764 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 765 return; 766 } 767 } 768 769 /* try reading mac address from EEPROM */ 770 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 771 eth_hw_addr_set(dev->net, addr); 772 if (is_valid_ether_addr(dev->net->dev_addr)) { 773 /* eeprom values are valid so use them */ 774 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 775 return; 776 } 777 } 778 779 /* no useful static MAC address found. generate a random one */ 780 eth_hw_addr_random(dev->net); 781 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 782 } 783 784 static int smsc95xx_set_mac_address(struct usbnet *dev) 785 { 786 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 787 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 788 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 789 int ret; 790 791 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 792 if (ret < 0) 793 return ret; 794 795 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 796 } 797 798 /* starts the TX path */ 799 static int smsc95xx_start_tx_path(struct usbnet *dev) 800 { 801 struct smsc95xx_priv *pdata = dev->driver_priv; 802 unsigned long flags; 803 int ret; 804 805 /* Enable Tx at MAC */ 806 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 807 pdata->mac_cr |= MAC_CR_TXEN_; 808 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 809 810 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 811 if (ret < 0) 812 return ret; 813 814 /* Enable Tx at SCSRs */ 815 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 816 } 817 818 /* Starts the Receive path */ 819 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 820 { 821 struct smsc95xx_priv *pdata = dev->driver_priv; 822 unsigned long flags; 823 824 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 825 pdata->mac_cr |= MAC_CR_RXEN_; 826 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 827 828 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 829 } 830 831 static int smsc95xx_reset(struct usbnet *dev) 832 { 833 struct smsc95xx_priv *pdata = dev->driver_priv; 834 u32 read_buf, write_buf, burst_cap; 835 int ret = 0, timeout; 836 837 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 838 839 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 840 if (ret < 0) 841 return ret; 842 843 timeout = 0; 844 do { 845 msleep(10); 846 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 847 if (ret < 0) 848 return ret; 849 timeout++; 850 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 851 852 if (timeout >= 100) { 853 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 854 return ret; 855 } 856 857 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 858 if (ret < 0) 859 return ret; 860 861 timeout = 0; 862 do { 863 msleep(10); 864 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 865 if (ret < 0) 866 return ret; 867 timeout++; 868 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 869 870 if (timeout >= 100) { 871 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 872 return ret; 873 } 874 875 ret = smsc95xx_set_mac_address(dev); 876 if (ret < 0) 877 return ret; 878 879 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 880 dev->net->dev_addr); 881 882 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 883 if (ret < 0) 884 return ret; 885 886 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 887 read_buf); 888 889 read_buf |= HW_CFG_BIR_; 890 891 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 892 if (ret < 0) 893 return ret; 894 895 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 896 if (ret < 0) 897 return ret; 898 899 netif_dbg(dev, ifup, dev->net, 900 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 901 read_buf); 902 903 if (!turbo_mode) { 904 burst_cap = 0; 905 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 906 } else if (dev->udev->speed == USB_SPEED_HIGH) { 907 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 908 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 909 } else { 910 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 911 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 912 } 913 914 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 915 (ulong)dev->rx_urb_size); 916 917 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 918 if (ret < 0) 919 return ret; 920 921 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 922 if (ret < 0) 923 return ret; 924 925 netif_dbg(dev, ifup, dev->net, 926 "Read Value from BURST_CAP after writing: 0x%08x\n", 927 read_buf); 928 929 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 930 if (ret < 0) 931 return ret; 932 933 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 934 if (ret < 0) 935 return ret; 936 937 netif_dbg(dev, ifup, dev->net, 938 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 939 read_buf); 940 941 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 942 if (ret < 0) 943 return ret; 944 945 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 946 read_buf); 947 948 if (turbo_mode) 949 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 950 951 read_buf &= ~HW_CFG_RXDOFF_; 952 953 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 954 read_buf |= NET_IP_ALIGN << 9; 955 956 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 957 if (ret < 0) 958 return ret; 959 960 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 961 if (ret < 0) 962 return ret; 963 964 netif_dbg(dev, ifup, dev->net, 965 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 966 967 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 968 if (ret < 0) 969 return ret; 970 971 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 972 if (ret < 0) 973 return ret; 974 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 975 976 /* Configure GPIO pins as LED outputs */ 977 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 978 LED_GPIO_CFG_FDX_LED; 979 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 980 if (ret < 0) 981 return ret; 982 983 /* Init Tx */ 984 ret = smsc95xx_write_reg(dev, FLOW, 0); 985 if (ret < 0) 986 return ret; 987 988 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 989 if (ret < 0) 990 return ret; 991 992 /* Don't need mac_cr_lock during initialisation */ 993 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 994 if (ret < 0) 995 return ret; 996 997 /* Init Rx */ 998 /* Set Vlan */ 999 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1000 if (ret < 0) 1001 return ret; 1002 1003 /* Enable or disable checksum offload engines */ 1004 ret = smsc95xx_set_features(dev->net, dev->net->features); 1005 if (ret < 0) { 1006 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1007 return ret; 1008 } 1009 1010 smsc95xx_set_multicast(dev->net); 1011 1012 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1013 if (ret < 0) 1014 return ret; 1015 1016 /* enable PHY interrupts */ 1017 read_buf |= INT_EP_CTL_PHY_INT_; 1018 1019 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1020 if (ret < 0) 1021 return ret; 1022 1023 ret = smsc95xx_start_tx_path(dev); 1024 if (ret < 0) { 1025 netdev_warn(dev->net, "Failed to start TX path\n"); 1026 return ret; 1027 } 1028 1029 ret = smsc95xx_start_rx_path(dev, 0); 1030 if (ret < 0) { 1031 netdev_warn(dev->net, "Failed to start RX path\n"); 1032 return ret; 1033 } 1034 1035 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1036 return 0; 1037 } 1038 1039 static const struct net_device_ops smsc95xx_netdev_ops = { 1040 .ndo_open = usbnet_open, 1041 .ndo_stop = usbnet_stop, 1042 .ndo_start_xmit = usbnet_start_xmit, 1043 .ndo_tx_timeout = usbnet_tx_timeout, 1044 .ndo_change_mtu = usbnet_change_mtu, 1045 .ndo_get_stats64 = dev_get_tstats64, 1046 .ndo_set_mac_address = eth_mac_addr, 1047 .ndo_validate_addr = eth_validate_addr, 1048 .ndo_eth_ioctl = smsc95xx_ioctl, 1049 .ndo_set_rx_mode = smsc95xx_set_multicast, 1050 .ndo_set_features = smsc95xx_set_features, 1051 }; 1052 1053 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1054 { 1055 struct smsc95xx_priv *pdata; 1056 bool is_internal_phy; 1057 u32 val; 1058 int ret; 1059 1060 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1061 1062 ret = usbnet_get_endpoints(dev, intf); 1063 if (ret < 0) { 1064 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1065 return ret; 1066 } 1067 1068 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1069 if (!pdata) 1070 return -ENOMEM; 1071 1072 dev->driver_priv = pdata; 1073 1074 spin_lock_init(&pdata->mac_cr_lock); 1075 1076 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1077 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1078 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1079 * it is transmitted as all ones. The zero transmitted checksum means 1080 * transmitter generated no checksum. Hence, enable csum offload only 1081 * for ipv4 packets. 1082 */ 1083 if (DEFAULT_TX_CSUM_ENABLE) 1084 dev->net->features |= NETIF_F_IP_CSUM; 1085 if (DEFAULT_RX_CSUM_ENABLE) 1086 dev->net->features |= NETIF_F_RXCSUM; 1087 1088 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1089 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1090 1091 smsc95xx_init_mac_address(dev); 1092 1093 /* Init all registers */ 1094 ret = smsc95xx_reset(dev); 1095 if (ret) 1096 goto free_pdata; 1097 1098 pdata->mdiobus = mdiobus_alloc(); 1099 if (!pdata->mdiobus) { 1100 ret = -ENOMEM; 1101 goto free_pdata; 1102 } 1103 1104 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1105 if (ret < 0) 1106 goto free_mdio; 1107 1108 is_internal_phy = !(val & HW_CFG_PSEL_); 1109 if (is_internal_phy) 1110 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1111 1112 pdata->mdiobus->priv = dev; 1113 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1114 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1115 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1116 pdata->mdiobus->parent = &dev->udev->dev; 1117 1118 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1119 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1120 1121 ret = mdiobus_register(pdata->mdiobus); 1122 if (ret) { 1123 netdev_err(dev->net, "Could not register MDIO bus\n"); 1124 goto free_mdio; 1125 } 1126 1127 pdata->phydev = phy_find_first(pdata->mdiobus); 1128 if (!pdata->phydev) { 1129 netdev_err(dev->net, "no PHY found\n"); 1130 ret = -ENODEV; 1131 goto unregister_mdio; 1132 } 1133 1134 pdata->phydev->is_internal = is_internal_phy; 1135 1136 /* detect device revision as different features may be available */ 1137 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1138 if (ret < 0) 1139 goto unregister_mdio; 1140 1141 val >>= 16; 1142 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1143 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1144 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1145 FEATURE_PHY_NLP_CROSSOVER | 1146 FEATURE_REMOTE_WAKEUP); 1147 else if (val == ID_REV_CHIP_ID_9512_) 1148 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1149 1150 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1151 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1152 dev->net->flags |= IFF_MULTICAST; 1153 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1154 dev->net->min_mtu = ETH_MIN_MTU; 1155 dev->net->max_mtu = ETH_DATA_LEN; 1156 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1157 return 0; 1158 1159 unregister_mdio: 1160 mdiobus_unregister(pdata->mdiobus); 1161 1162 free_mdio: 1163 mdiobus_free(pdata->mdiobus); 1164 1165 free_pdata: 1166 kfree(pdata); 1167 return ret; 1168 } 1169 1170 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1171 { 1172 struct smsc95xx_priv *pdata = dev->driver_priv; 1173 1174 mdiobus_unregister(pdata->mdiobus); 1175 mdiobus_free(pdata->mdiobus); 1176 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1177 kfree(pdata); 1178 } 1179 1180 static void smsc95xx_handle_link_change(struct net_device *net) 1181 { 1182 struct usbnet *dev = netdev_priv(net); 1183 1184 phy_print_status(net->phydev); 1185 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1186 } 1187 1188 static int smsc95xx_start_phy(struct usbnet *dev) 1189 { 1190 struct smsc95xx_priv *pdata = dev->driver_priv; 1191 struct net_device *net = dev->net; 1192 int ret; 1193 1194 ret = smsc95xx_reset(dev); 1195 if (ret < 0) 1196 return ret; 1197 1198 ret = phy_connect_direct(net, pdata->phydev, 1199 &smsc95xx_handle_link_change, 1200 PHY_INTERFACE_MODE_MII); 1201 if (ret) { 1202 netdev_err(net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1203 return ret; 1204 } 1205 1206 phy_attached_info(net->phydev); 1207 phy_start(net->phydev); 1208 return 0; 1209 } 1210 1211 static int smsc95xx_disconnect_phy(struct usbnet *dev) 1212 { 1213 phy_stop(dev->net->phydev); 1214 phy_disconnect(dev->net->phydev); 1215 return 0; 1216 } 1217 1218 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1219 { 1220 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1221 return crc << ((filter % 2) * 16); 1222 } 1223 1224 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1225 { 1226 int ret; 1227 1228 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1229 1230 /* read to clear */ 1231 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_SRC); 1232 if (ret < 0) 1233 return ret; 1234 1235 /* enable interrupt source */ 1236 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_MASK); 1237 if (ret < 0) 1238 return ret; 1239 1240 ret |= mask; 1241 1242 smsc95xx_mdio_write_nopm(dev, PHY_INT_MASK, ret); 1243 1244 return 0; 1245 } 1246 1247 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1248 { 1249 int ret; 1250 1251 /* first, a dummy read, needed to latch some MII phys */ 1252 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1253 if (ret < 0) 1254 return ret; 1255 1256 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1257 if (ret < 0) 1258 return ret; 1259 1260 return !!(ret & BMSR_LSTATUS); 1261 } 1262 1263 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1264 { 1265 struct smsc95xx_priv *pdata = dev->driver_priv; 1266 u32 val; 1267 int ret; 1268 1269 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1270 if (ret < 0) 1271 return ret; 1272 1273 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1274 val |= PM_CTL_SUS_MODE_0; 1275 1276 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1277 if (ret < 0) 1278 return ret; 1279 1280 /* clear wol status */ 1281 val &= ~PM_CTL_WUPS_; 1282 val |= PM_CTL_WUPS_WOL_; 1283 1284 /* enable energy detection */ 1285 if (pdata->wolopts & WAKE_PHY) 1286 val |= PM_CTL_WUPS_ED_; 1287 1288 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1289 if (ret < 0) 1290 return ret; 1291 1292 /* read back PM_CTRL */ 1293 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1294 if (ret < 0) 1295 return ret; 1296 1297 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1298 1299 return 0; 1300 } 1301 1302 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1303 { 1304 struct smsc95xx_priv *pdata = dev->driver_priv; 1305 u32 val; 1306 int ret; 1307 1308 /* reconfigure link pulse detection timing for 1309 * compatibility with non-standard link partners 1310 */ 1311 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1312 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG, 1313 PHY_EDPD_CONFIG_DEFAULT); 1314 1315 /* enable energy detect power-down mode */ 1316 ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS); 1317 if (ret < 0) 1318 return ret; 1319 1320 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1321 1322 smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret); 1323 1324 /* enter SUSPEND1 mode */ 1325 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1326 if (ret < 0) 1327 return ret; 1328 1329 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1330 val |= PM_CTL_SUS_MODE_1; 1331 1332 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1333 if (ret < 0) 1334 return ret; 1335 1336 /* clear wol status, enable energy detection */ 1337 val &= ~PM_CTL_WUPS_; 1338 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1339 1340 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1341 if (ret < 0) 1342 return ret; 1343 1344 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1345 1346 return 0; 1347 } 1348 1349 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1350 { 1351 struct smsc95xx_priv *pdata = dev->driver_priv; 1352 u32 val; 1353 int ret; 1354 1355 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1356 if (ret < 0) 1357 return ret; 1358 1359 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1360 val |= PM_CTL_SUS_MODE_2; 1361 1362 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1363 if (ret < 0) 1364 return ret; 1365 1366 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1367 1368 return 0; 1369 } 1370 1371 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1372 { 1373 struct smsc95xx_priv *pdata = dev->driver_priv; 1374 u32 val; 1375 int ret; 1376 1377 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1378 if (ret < 0) 1379 return ret; 1380 1381 if (val & RX_FIFO_INF_USED_) { 1382 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1383 return -EBUSY; 1384 } 1385 1386 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1387 if (ret < 0) 1388 return ret; 1389 1390 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1391 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1392 1393 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1394 if (ret < 0) 1395 return ret; 1396 1397 /* clear wol status */ 1398 val &= ~PM_CTL_WUPS_; 1399 val |= PM_CTL_WUPS_WOL_; 1400 1401 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1402 if (ret < 0) 1403 return ret; 1404 1405 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1406 1407 return 0; 1408 } 1409 1410 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1411 { 1412 struct smsc95xx_priv *pdata = dev->driver_priv; 1413 int ret; 1414 1415 if (!netif_running(dev->net)) { 1416 /* interface is ifconfig down so fully power down hw */ 1417 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1418 return smsc95xx_enter_suspend2(dev); 1419 } 1420 1421 if (!link_up) { 1422 /* link is down so enter EDPD mode, but only if device can 1423 * reliably resume from it. This check should be redundant 1424 * as current FEATURE_REMOTE_WAKEUP parts also support 1425 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1426 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1427 netdev_warn(dev->net, "EDPD not supported\n"); 1428 return -EBUSY; 1429 } 1430 1431 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1432 1433 /* enable PHY wakeup events for if cable is attached */ 1434 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1435 PHY_INT_MASK_ANEG_COMP_); 1436 if (ret < 0) { 1437 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1438 return ret; 1439 } 1440 1441 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1442 return smsc95xx_enter_suspend1(dev); 1443 } 1444 1445 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1446 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1447 PHY_INT_MASK_LINK_DOWN_); 1448 if (ret < 0) { 1449 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1450 return ret; 1451 } 1452 1453 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1454 return smsc95xx_enter_suspend3(dev); 1455 } 1456 1457 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1458 { 1459 struct usbnet *dev = usb_get_intfdata(intf); 1460 struct smsc95xx_priv *pdata = dev->driver_priv; 1461 u32 val, link_up; 1462 int ret; 1463 1464 ret = usbnet_suspend(intf, message); 1465 if (ret < 0) { 1466 netdev_warn(dev->net, "usbnet_suspend error\n"); 1467 return ret; 1468 } 1469 1470 if (pdata->suspend_flags) { 1471 netdev_warn(dev->net, "error during last resume\n"); 1472 pdata->suspend_flags = 0; 1473 } 1474 1475 /* determine if link is up using only _nopm functions */ 1476 link_up = smsc95xx_link_ok_nopm(dev); 1477 1478 if (message.event == PM_EVENT_AUTO_SUSPEND && 1479 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1480 ret = smsc95xx_autosuspend(dev, link_up); 1481 goto done; 1482 } 1483 1484 /* if we get this far we're not autosuspending */ 1485 /* if no wol options set, or if link is down and we're not waking on 1486 * PHY activity, enter lowest power SUSPEND2 mode 1487 */ 1488 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1489 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1490 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1491 1492 /* disable energy detect (link up) & wake up events */ 1493 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1494 if (ret < 0) 1495 goto done; 1496 1497 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1498 1499 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1500 if (ret < 0) 1501 goto done; 1502 1503 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1504 if (ret < 0) 1505 goto done; 1506 1507 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1508 1509 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1510 if (ret < 0) 1511 goto done; 1512 1513 ret = smsc95xx_enter_suspend2(dev); 1514 goto done; 1515 } 1516 1517 if (pdata->wolopts & WAKE_PHY) { 1518 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1519 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1520 if (ret < 0) { 1521 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1522 goto done; 1523 } 1524 1525 /* if link is down then configure EDPD and enter SUSPEND1, 1526 * otherwise enter SUSPEND0 below 1527 */ 1528 if (!link_up) { 1529 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1530 ret = smsc95xx_enter_suspend1(dev); 1531 goto done; 1532 } 1533 } 1534 1535 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1536 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1537 u32 command[2]; 1538 u32 offset[2]; 1539 u32 crc[4]; 1540 int wuff_filter_count = 1541 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1542 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1543 int i, filter = 0; 1544 1545 if (!filter_mask) { 1546 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1547 ret = -ENOMEM; 1548 goto done; 1549 } 1550 1551 memset(command, 0, sizeof(command)); 1552 memset(offset, 0, sizeof(offset)); 1553 memset(crc, 0, sizeof(crc)); 1554 1555 if (pdata->wolopts & WAKE_BCAST) { 1556 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1557 netdev_info(dev->net, "enabling broadcast detection\n"); 1558 filter_mask[filter * 4] = 0x003F; 1559 filter_mask[filter * 4 + 1] = 0x00; 1560 filter_mask[filter * 4 + 2] = 0x00; 1561 filter_mask[filter * 4 + 3] = 0x00; 1562 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1563 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1564 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1565 filter++; 1566 } 1567 1568 if (pdata->wolopts & WAKE_MCAST) { 1569 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1570 netdev_info(dev->net, "enabling multicast detection\n"); 1571 filter_mask[filter * 4] = 0x0007; 1572 filter_mask[filter * 4 + 1] = 0x00; 1573 filter_mask[filter * 4 + 2] = 0x00; 1574 filter_mask[filter * 4 + 3] = 0x00; 1575 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1576 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1577 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1578 filter++; 1579 } 1580 1581 if (pdata->wolopts & WAKE_ARP) { 1582 const u8 arp[] = {0x08, 0x06}; 1583 netdev_info(dev->net, "enabling ARP detection\n"); 1584 filter_mask[filter * 4] = 0x0003; 1585 filter_mask[filter * 4 + 1] = 0x00; 1586 filter_mask[filter * 4 + 2] = 0x00; 1587 filter_mask[filter * 4 + 3] = 0x00; 1588 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1589 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1590 crc[filter/2] |= smsc_crc(arp, 2, filter); 1591 filter++; 1592 } 1593 1594 if (pdata->wolopts & WAKE_UCAST) { 1595 netdev_info(dev->net, "enabling unicast detection\n"); 1596 filter_mask[filter * 4] = 0x003F; 1597 filter_mask[filter * 4 + 1] = 0x00; 1598 filter_mask[filter * 4 + 2] = 0x00; 1599 filter_mask[filter * 4 + 3] = 0x00; 1600 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1601 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1602 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1603 filter++; 1604 } 1605 1606 for (i = 0; i < (wuff_filter_count * 4); i++) { 1607 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1608 if (ret < 0) { 1609 kfree(filter_mask); 1610 goto done; 1611 } 1612 } 1613 kfree(filter_mask); 1614 1615 for (i = 0; i < (wuff_filter_count / 4); i++) { 1616 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1617 if (ret < 0) 1618 goto done; 1619 } 1620 1621 for (i = 0; i < (wuff_filter_count / 4); i++) { 1622 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1623 if (ret < 0) 1624 goto done; 1625 } 1626 1627 for (i = 0; i < (wuff_filter_count / 2); i++) { 1628 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1629 if (ret < 0) 1630 goto done; 1631 } 1632 1633 /* clear any pending pattern match packet status */ 1634 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1635 if (ret < 0) 1636 goto done; 1637 1638 val |= WUCSR_WUFR_; 1639 1640 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1641 if (ret < 0) 1642 goto done; 1643 } 1644 1645 if (pdata->wolopts & WAKE_MAGIC) { 1646 /* clear any pending magic packet status */ 1647 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1648 if (ret < 0) 1649 goto done; 1650 1651 val |= WUCSR_MPR_; 1652 1653 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1654 if (ret < 0) 1655 goto done; 1656 } 1657 1658 /* enable/disable wakeup sources */ 1659 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1660 if (ret < 0) 1661 goto done; 1662 1663 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1664 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1665 val |= WUCSR_WAKE_EN_; 1666 } else { 1667 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1668 val &= ~WUCSR_WAKE_EN_; 1669 } 1670 1671 if (pdata->wolopts & WAKE_MAGIC) { 1672 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1673 val |= WUCSR_MPEN_; 1674 } else { 1675 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1676 val &= ~WUCSR_MPEN_; 1677 } 1678 1679 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1680 if (ret < 0) 1681 goto done; 1682 1683 /* enable wol wakeup source */ 1684 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1685 if (ret < 0) 1686 goto done; 1687 1688 val |= PM_CTL_WOL_EN_; 1689 1690 /* phy energy detect wakeup source */ 1691 if (pdata->wolopts & WAKE_PHY) 1692 val |= PM_CTL_ED_EN_; 1693 1694 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1695 if (ret < 0) 1696 goto done; 1697 1698 /* enable receiver to enable frame reception */ 1699 smsc95xx_start_rx_path(dev, 1); 1700 1701 /* some wol options are enabled, so enter SUSPEND0 */ 1702 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1703 ret = smsc95xx_enter_suspend0(dev); 1704 1705 done: 1706 /* 1707 * TODO: resume() might need to handle the suspend failure 1708 * in system sleep 1709 */ 1710 if (ret && PMSG_IS_AUTO(message)) 1711 usbnet_resume(intf); 1712 1713 return ret; 1714 } 1715 1716 static int smsc95xx_resume(struct usb_interface *intf) 1717 { 1718 struct usbnet *dev = usb_get_intfdata(intf); 1719 struct smsc95xx_priv *pdata; 1720 u8 suspend_flags; 1721 int ret; 1722 u32 val; 1723 1724 BUG_ON(!dev); 1725 pdata = dev->driver_priv; 1726 suspend_flags = pdata->suspend_flags; 1727 1728 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1729 1730 /* do this first to ensure it's cleared even in error case */ 1731 pdata->suspend_flags = 0; 1732 1733 if (suspend_flags & SUSPEND_ALLMODES) { 1734 /* clear wake-up sources */ 1735 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1736 if (ret < 0) 1737 return ret; 1738 1739 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1740 1741 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1742 if (ret < 0) 1743 return ret; 1744 1745 /* clear wake-up status */ 1746 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1747 if (ret < 0) 1748 return ret; 1749 1750 val &= ~PM_CTL_WOL_EN_; 1751 val |= PM_CTL_WUPS_; 1752 1753 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1754 if (ret < 0) 1755 return ret; 1756 } 1757 1758 ret = usbnet_resume(intf); 1759 if (ret < 0) 1760 netdev_warn(dev->net, "usbnet_resume error\n"); 1761 1762 phy_init_hw(pdata->phydev); 1763 return ret; 1764 } 1765 1766 static int smsc95xx_reset_resume(struct usb_interface *intf) 1767 { 1768 struct usbnet *dev = usb_get_intfdata(intf); 1769 int ret; 1770 1771 ret = smsc95xx_reset(dev); 1772 if (ret < 0) 1773 return ret; 1774 1775 return smsc95xx_resume(intf); 1776 } 1777 1778 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1779 { 1780 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1781 skb->ip_summed = CHECKSUM_COMPLETE; 1782 skb_trim(skb, skb->len - 2); 1783 } 1784 1785 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1786 { 1787 /* This check is no longer done by usbnet */ 1788 if (skb->len < dev->net->hard_header_len) 1789 return 0; 1790 1791 while (skb->len > 0) { 1792 u32 header, align_count; 1793 struct sk_buff *ax_skb; 1794 unsigned char *packet; 1795 u16 size; 1796 1797 header = get_unaligned_le32(skb->data); 1798 skb_pull(skb, 4 + NET_IP_ALIGN); 1799 packet = skb->data; 1800 1801 /* get the packet length */ 1802 size = (u16)((header & RX_STS_FL_) >> 16); 1803 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1804 1805 if (unlikely(header & RX_STS_ES_)) { 1806 netif_dbg(dev, rx_err, dev->net, 1807 "Error header=0x%08x\n", header); 1808 dev->net->stats.rx_errors++; 1809 dev->net->stats.rx_dropped++; 1810 1811 if (header & RX_STS_CRC_) { 1812 dev->net->stats.rx_crc_errors++; 1813 } else { 1814 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1815 dev->net->stats.rx_frame_errors++; 1816 1817 if ((header & RX_STS_LE_) && 1818 (!(header & RX_STS_FT_))) 1819 dev->net->stats.rx_length_errors++; 1820 } 1821 } else { 1822 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1823 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1824 netif_dbg(dev, rx_err, dev->net, 1825 "size err header=0x%08x\n", header); 1826 return 0; 1827 } 1828 1829 /* last frame in this batch */ 1830 if (skb->len == size) { 1831 if (dev->net->features & NETIF_F_RXCSUM) 1832 smsc95xx_rx_csum_offload(skb); 1833 skb_trim(skb, skb->len - 4); /* remove fcs */ 1834 skb->truesize = size + sizeof(struct sk_buff); 1835 1836 return 1; 1837 } 1838 1839 ax_skb = skb_clone(skb, GFP_ATOMIC); 1840 if (unlikely(!ax_skb)) { 1841 netdev_warn(dev->net, "Error allocating skb\n"); 1842 return 0; 1843 } 1844 1845 ax_skb->len = size; 1846 ax_skb->data = packet; 1847 skb_set_tail_pointer(ax_skb, size); 1848 1849 if (dev->net->features & NETIF_F_RXCSUM) 1850 smsc95xx_rx_csum_offload(ax_skb); 1851 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1852 ax_skb->truesize = size + sizeof(struct sk_buff); 1853 1854 usbnet_skb_return(dev, ax_skb); 1855 } 1856 1857 skb_pull(skb, size); 1858 1859 /* padding bytes before the next frame starts */ 1860 if (skb->len) 1861 skb_pull(skb, align_count); 1862 } 1863 1864 return 1; 1865 } 1866 1867 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1868 { 1869 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1870 u16 high_16 = low_16 + skb->csum_offset; 1871 return (high_16 << 16) | low_16; 1872 } 1873 1874 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1875 * transmission. This is fairly unlikely, only seems to trigger with some 1876 * short TCP ACK packets sent. 1877 * 1878 * Note, this calculation should probably check for the alignment of the 1879 * data as well, but a straight check for csum being in the last four bytes 1880 * of the packet should be ok for now. 1881 */ 1882 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1883 { 1884 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1885 1886 if (skb->len <= 45) 1887 return false; 1888 return skb->csum_offset < (len - (4 + 1)); 1889 } 1890 1891 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1892 struct sk_buff *skb, gfp_t flags) 1893 { 1894 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1895 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1896 u32 tx_cmd_a, tx_cmd_b; 1897 void *ptr; 1898 1899 /* We do not advertise SG, so skbs should be already linearized */ 1900 BUG_ON(skb_shinfo(skb)->nr_frags); 1901 1902 /* Make writable and expand header space by overhead if required */ 1903 if (skb_cow_head(skb, overhead)) { 1904 /* Must deallocate here as returning NULL to indicate error 1905 * means the skb won't be deallocated in the caller. 1906 */ 1907 dev_kfree_skb_any(skb); 1908 return NULL; 1909 } 1910 1911 tx_cmd_b = (u32)skb->len; 1912 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1913 1914 if (csum) { 1915 if (!smsc95xx_can_tx_checksum(skb)) { 1916 /* workaround - hardware tx checksum does not work 1917 * properly with extremely small packets */ 1918 long csstart = skb_checksum_start_offset(skb); 1919 __wsum calc = csum_partial(skb->data + csstart, 1920 skb->len - csstart, 0); 1921 *((__sum16 *)(skb->data + csstart 1922 + skb->csum_offset)) = csum_fold(calc); 1923 1924 csum = false; 1925 } else { 1926 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1927 ptr = skb_push(skb, 4); 1928 put_unaligned_le32(csum_preamble, ptr); 1929 1930 tx_cmd_a += 4; 1931 tx_cmd_b += 4; 1932 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1933 } 1934 } 1935 1936 ptr = skb_push(skb, 8); 1937 put_unaligned_le32(tx_cmd_a, ptr); 1938 put_unaligned_le32(tx_cmd_b, ptr+4); 1939 1940 return skb; 1941 } 1942 1943 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1944 { 1945 struct smsc95xx_priv *pdata = dev->driver_priv; 1946 1947 dev->intf->needs_remote_wakeup = on; 1948 1949 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1950 return 0; 1951 1952 /* this chip revision isn't capable of remote wakeup */ 1953 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1954 1955 if (on) 1956 usb_autopm_get_interface_no_resume(dev->intf); 1957 else 1958 usb_autopm_put_interface(dev->intf); 1959 1960 return 0; 1961 } 1962 1963 static const struct driver_info smsc95xx_info = { 1964 .description = "smsc95xx USB 2.0 Ethernet", 1965 .bind = smsc95xx_bind, 1966 .unbind = smsc95xx_unbind, 1967 .link_reset = smsc95xx_link_reset, 1968 .reset = smsc95xx_start_phy, 1969 .stop = smsc95xx_disconnect_phy, 1970 .rx_fixup = smsc95xx_rx_fixup, 1971 .tx_fixup = smsc95xx_tx_fixup, 1972 .status = smsc95xx_status, 1973 .manage_power = smsc95xx_manage_power, 1974 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 1975 }; 1976 1977 static const struct usb_device_id products[] = { 1978 { 1979 /* SMSC9500 USB Ethernet Device */ 1980 USB_DEVICE(0x0424, 0x9500), 1981 .driver_info = (unsigned long) &smsc95xx_info, 1982 }, 1983 { 1984 /* SMSC9505 USB Ethernet Device */ 1985 USB_DEVICE(0x0424, 0x9505), 1986 .driver_info = (unsigned long) &smsc95xx_info, 1987 }, 1988 { 1989 /* SMSC9500A USB Ethernet Device */ 1990 USB_DEVICE(0x0424, 0x9E00), 1991 .driver_info = (unsigned long) &smsc95xx_info, 1992 }, 1993 { 1994 /* SMSC9505A USB Ethernet Device */ 1995 USB_DEVICE(0x0424, 0x9E01), 1996 .driver_info = (unsigned long) &smsc95xx_info, 1997 }, 1998 { 1999 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2000 USB_DEVICE(0x0424, 0xec00), 2001 .driver_info = (unsigned long) &smsc95xx_info, 2002 }, 2003 { 2004 /* SMSC9500 USB Ethernet Device (SAL10) */ 2005 USB_DEVICE(0x0424, 0x9900), 2006 .driver_info = (unsigned long) &smsc95xx_info, 2007 }, 2008 { 2009 /* SMSC9505 USB Ethernet Device (SAL10) */ 2010 USB_DEVICE(0x0424, 0x9901), 2011 .driver_info = (unsigned long) &smsc95xx_info, 2012 }, 2013 { 2014 /* SMSC9500A USB Ethernet Device (SAL10) */ 2015 USB_DEVICE(0x0424, 0x9902), 2016 .driver_info = (unsigned long) &smsc95xx_info, 2017 }, 2018 { 2019 /* SMSC9505A USB Ethernet Device (SAL10) */ 2020 USB_DEVICE(0x0424, 0x9903), 2021 .driver_info = (unsigned long) &smsc95xx_info, 2022 }, 2023 { 2024 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2025 USB_DEVICE(0x0424, 0x9904), 2026 .driver_info = (unsigned long) &smsc95xx_info, 2027 }, 2028 { 2029 /* SMSC9500A USB Ethernet Device (HAL) */ 2030 USB_DEVICE(0x0424, 0x9905), 2031 .driver_info = (unsigned long) &smsc95xx_info, 2032 }, 2033 { 2034 /* SMSC9505A USB Ethernet Device (HAL) */ 2035 USB_DEVICE(0x0424, 0x9906), 2036 .driver_info = (unsigned long) &smsc95xx_info, 2037 }, 2038 { 2039 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2040 USB_DEVICE(0x0424, 0x9907), 2041 .driver_info = (unsigned long) &smsc95xx_info, 2042 }, 2043 { 2044 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2045 USB_DEVICE(0x0424, 0x9908), 2046 .driver_info = (unsigned long) &smsc95xx_info, 2047 }, 2048 { 2049 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2050 USB_DEVICE(0x0424, 0x9909), 2051 .driver_info = (unsigned long) &smsc95xx_info, 2052 }, 2053 { 2054 /* SMSC LAN9530 USB Ethernet Device */ 2055 USB_DEVICE(0x0424, 0x9530), 2056 .driver_info = (unsigned long) &smsc95xx_info, 2057 }, 2058 { 2059 /* SMSC LAN9730 USB Ethernet Device */ 2060 USB_DEVICE(0x0424, 0x9730), 2061 .driver_info = (unsigned long) &smsc95xx_info, 2062 }, 2063 { 2064 /* SMSC LAN89530 USB Ethernet Device */ 2065 USB_DEVICE(0x0424, 0x9E08), 2066 .driver_info = (unsigned long) &smsc95xx_info, 2067 }, 2068 { }, /* END */ 2069 }; 2070 MODULE_DEVICE_TABLE(usb, products); 2071 2072 static struct usb_driver smsc95xx_driver = { 2073 .name = "smsc95xx", 2074 .id_table = products, 2075 .probe = usbnet_probe, 2076 .suspend = smsc95xx_suspend, 2077 .resume = smsc95xx_resume, 2078 .reset_resume = smsc95xx_reset_resume, 2079 .disconnect = usbnet_disconnect, 2080 .disable_hub_initiated_lpm = 1, 2081 .supports_autosuspend = 1, 2082 }; 2083 2084 module_usb_driver(smsc95xx_driver); 2085 2086 MODULE_AUTHOR("Nancy Lin"); 2087 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2088 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2089 MODULE_LICENSE("GPL"); 2090