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 (ret < 0) { 88 if (ret != -ENODEV) 89 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 90 index, ret); 91 return ret; 92 } 93 94 le32_to_cpus(&buf); 95 *data = buf; 96 97 return ret; 98 } 99 100 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index, 101 u32 data, int in_pm) 102 { 103 u32 buf; 104 int ret; 105 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 106 107 BUG_ON(!dev); 108 109 if (!in_pm) 110 fn = usbnet_write_cmd; 111 else 112 fn = usbnet_write_cmd_nopm; 113 114 buf = data; 115 cpu_to_le32s(&buf); 116 117 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 118 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 119 0, index, &buf, 4); 120 if (ret < 0 && ret != -ENODEV) 121 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 122 index, ret); 123 124 return ret; 125 } 126 127 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index, 128 u32 *data) 129 { 130 return __smsc95xx_read_reg(dev, index, data, 1); 131 } 132 133 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index, 134 u32 data) 135 { 136 return __smsc95xx_write_reg(dev, index, data, 1); 137 } 138 139 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 140 u32 *data) 141 { 142 return __smsc95xx_read_reg(dev, index, data, 0); 143 } 144 145 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 146 u32 data) 147 { 148 return __smsc95xx_write_reg(dev, index, data, 0); 149 } 150 151 /* Loop until the read is completed with timeout 152 * called with phy_mutex held */ 153 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev, 154 int in_pm) 155 { 156 unsigned long start_time = jiffies; 157 u32 val; 158 int ret; 159 160 do { 161 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm); 162 if (ret < 0) { 163 /* Ignore -ENODEV error during disconnect() */ 164 if (ret == -ENODEV) 165 return 0; 166 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 167 return ret; 168 } 169 170 if (!(val & MII_BUSY_)) 171 return 0; 172 } while (!time_after(jiffies, start_time + HZ)); 173 174 return -EIO; 175 } 176 177 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 178 { 179 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 180 } 181 182 static int __smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx, 183 int in_pm) 184 { 185 u32 val, addr; 186 int ret; 187 188 mutex_lock(&dev->phy_mutex); 189 190 /* confirm MII not busy */ 191 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 192 if (ret < 0) { 193 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 194 goto done; 195 } 196 197 /* set the address, index & direction (read from PHY) */ 198 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 199 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 200 if (ret < 0) { 201 if (ret != -ENODEV) 202 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 203 goto done; 204 } 205 206 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 207 if (ret < 0) { 208 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 209 goto done; 210 } 211 212 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm); 213 if (ret < 0) { 214 if (ret != -ENODEV) 215 netdev_warn(dev->net, "Error reading MII_DATA\n"); 216 goto done; 217 } 218 219 ret = (u16)(val & 0xFFFF); 220 221 done: 222 mutex_unlock(&dev->phy_mutex); 223 224 /* Ignore -ENODEV error during disconnect() */ 225 if (ret == -ENODEV) 226 return 0; 227 return ret; 228 } 229 230 static void __smsc95xx_mdio_write(struct usbnet *dev, int phy_id, 231 int idx, int regval, int in_pm) 232 { 233 u32 val, addr; 234 int ret; 235 236 mutex_lock(&dev->phy_mutex); 237 238 /* confirm MII not busy */ 239 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 240 if (ret < 0) { 241 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 242 goto done; 243 } 244 245 val = regval; 246 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm); 247 if (ret < 0) { 248 if (ret != -ENODEV) 249 netdev_warn(dev->net, "Error writing MII_DATA\n"); 250 goto done; 251 } 252 253 /* set the address, index & direction (write to PHY) */ 254 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 255 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 256 if (ret < 0) { 257 if (ret != -ENODEV) 258 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 259 goto done; 260 } 261 262 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 263 if (ret < 0) { 264 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 265 goto done; 266 } 267 268 done: 269 mutex_unlock(&dev->phy_mutex); 270 } 271 272 static int smsc95xx_mdio_read_nopm(struct usbnet *dev, int idx) 273 { 274 struct smsc95xx_priv *pdata = dev->driver_priv; 275 276 return __smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, idx, 1); 277 } 278 279 static void smsc95xx_mdio_write_nopm(struct usbnet *dev, int idx, int regval) 280 { 281 struct smsc95xx_priv *pdata = dev->driver_priv; 282 283 __smsc95xx_mdio_write(dev, pdata->phydev->mdio.addr, idx, regval, 1); 284 } 285 286 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 287 { 288 struct usbnet *dev = bus->priv; 289 290 return __smsc95xx_mdio_read(dev, phy_id, idx, 0); 291 } 292 293 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 294 u16 regval) 295 { 296 struct usbnet *dev = bus->priv; 297 298 __smsc95xx_mdio_write(dev, phy_id, idx, regval, 0); 299 return 0; 300 } 301 302 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 303 { 304 unsigned long start_time = jiffies; 305 u32 val; 306 int ret; 307 308 do { 309 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 310 if (ret < 0) { 311 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 312 return ret; 313 } 314 315 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 316 break; 317 udelay(40); 318 } while (!time_after(jiffies, start_time + HZ)); 319 320 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 321 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 322 return -EIO; 323 } 324 325 return 0; 326 } 327 328 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 329 { 330 unsigned long start_time = jiffies; 331 u32 val; 332 int ret; 333 334 do { 335 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 336 if (ret < 0) { 337 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 338 return ret; 339 } 340 341 if (!(val & E2P_CMD_BUSY_)) 342 return 0; 343 344 udelay(40); 345 } while (!time_after(jiffies, start_time + HZ)); 346 347 netdev_warn(dev->net, "EEPROM is busy\n"); 348 return -EIO; 349 } 350 351 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 352 u8 *data) 353 { 354 u32 val; 355 int i, ret; 356 357 BUG_ON(!dev); 358 BUG_ON(!data); 359 360 ret = smsc95xx_eeprom_confirm_not_busy(dev); 361 if (ret) 362 return ret; 363 364 for (i = 0; i < length; i++) { 365 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 366 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 367 if (ret < 0) { 368 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 369 return ret; 370 } 371 372 ret = smsc95xx_wait_eeprom(dev); 373 if (ret < 0) 374 return ret; 375 376 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 377 if (ret < 0) { 378 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 379 return ret; 380 } 381 382 data[i] = val & 0xFF; 383 offset++; 384 } 385 386 return 0; 387 } 388 389 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 390 u8 *data) 391 { 392 u32 val; 393 int i, ret; 394 395 BUG_ON(!dev); 396 BUG_ON(!data); 397 398 ret = smsc95xx_eeprom_confirm_not_busy(dev); 399 if (ret) 400 return ret; 401 402 /* Issue write/erase enable command */ 403 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 404 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 405 if (ret < 0) { 406 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 407 return ret; 408 } 409 410 ret = smsc95xx_wait_eeprom(dev); 411 if (ret < 0) 412 return ret; 413 414 for (i = 0; i < length; i++) { 415 416 /* Fill data register */ 417 val = data[i]; 418 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 419 if (ret < 0) { 420 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 421 return ret; 422 } 423 424 /* Send "write" command */ 425 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 426 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 427 if (ret < 0) { 428 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 429 return ret; 430 } 431 432 ret = smsc95xx_wait_eeprom(dev); 433 if (ret < 0) 434 return ret; 435 436 offset++; 437 } 438 439 return 0; 440 } 441 442 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 443 u32 data) 444 { 445 const u16 size = 4; 446 u32 buf; 447 int ret; 448 449 buf = data; 450 cpu_to_le32s(&buf); 451 452 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 453 USB_DIR_OUT | USB_TYPE_VENDOR | 454 USB_RECIP_DEVICE, 455 0, index, &buf, size); 456 if (ret < 0) 457 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 458 ret); 459 return ret; 460 } 461 462 /* returns hash bit number for given MAC address 463 * example: 464 * 01 00 5E 00 00 01 -> returns bit number 31 */ 465 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 466 { 467 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 468 } 469 470 static void smsc95xx_set_multicast(struct net_device *netdev) 471 { 472 struct usbnet *dev = netdev_priv(netdev); 473 struct smsc95xx_priv *pdata = dev->driver_priv; 474 unsigned long flags; 475 int ret; 476 477 pdata->hash_hi = 0; 478 pdata->hash_lo = 0; 479 480 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 481 482 if (dev->net->flags & IFF_PROMISC) { 483 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 484 pdata->mac_cr |= MAC_CR_PRMS_; 485 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 486 } else if (dev->net->flags & IFF_ALLMULTI) { 487 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 488 pdata->mac_cr |= MAC_CR_MCPAS_; 489 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 490 } else if (!netdev_mc_empty(dev->net)) { 491 struct netdev_hw_addr *ha; 492 493 pdata->mac_cr |= MAC_CR_HPFILT_; 494 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 495 496 netdev_for_each_mc_addr(ha, netdev) { 497 u32 bitnum = smsc95xx_hash(ha->addr); 498 u32 mask = 0x01 << (bitnum & 0x1F); 499 if (bitnum & 0x20) 500 pdata->hash_hi |= mask; 501 else 502 pdata->hash_lo |= mask; 503 } 504 505 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 506 pdata->hash_hi, pdata->hash_lo); 507 } else { 508 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 509 pdata->mac_cr &= 510 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 511 } 512 513 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 514 515 /* Initiate async writes, as we can't wait for completion here */ 516 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 517 if (ret < 0) 518 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 519 520 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 521 if (ret < 0) 522 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 523 524 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 525 if (ret < 0) 526 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 527 } 528 529 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 530 { 531 u32 flow = 0, afc_cfg; 532 struct smsc95xx_priv *pdata = dev->driver_priv; 533 bool tx_pause, rx_pause; 534 535 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 536 if (ret < 0) 537 return ret; 538 539 if (pdata->phydev->duplex == DUPLEX_FULL) { 540 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 541 542 if (rx_pause) 543 flow = 0xFFFF0002; 544 545 if (tx_pause) { 546 afc_cfg |= 0xF; 547 flow |= 0xFFFF0000; 548 } else { 549 afc_cfg &= ~0xF; 550 } 551 552 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 553 rx_pause ? "enabled" : "disabled", 554 tx_pause ? "enabled" : "disabled"); 555 } else { 556 netif_dbg(dev, link, dev->net, "half duplex\n"); 557 afc_cfg |= 0xF; 558 } 559 560 ret = smsc95xx_write_reg(dev, FLOW, flow); 561 if (ret < 0) 562 return ret; 563 564 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 565 } 566 567 static int smsc95xx_link_reset(struct usbnet *dev) 568 { 569 struct smsc95xx_priv *pdata = dev->driver_priv; 570 unsigned long flags; 571 int ret; 572 573 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 574 if (ret < 0) 575 return ret; 576 577 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 578 if (pdata->phydev->duplex != DUPLEX_FULL) { 579 pdata->mac_cr &= ~MAC_CR_FDPX_; 580 pdata->mac_cr |= MAC_CR_RCVOWN_; 581 } else { 582 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 583 pdata->mac_cr |= MAC_CR_FDPX_; 584 } 585 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 586 587 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 588 if (ret < 0) 589 return ret; 590 591 ret = smsc95xx_phy_update_flowcontrol(dev); 592 if (ret < 0) 593 netdev_warn(dev->net, "Error updating PHY flow control\n"); 594 595 return ret; 596 } 597 598 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 599 { 600 u32 intdata; 601 602 if (urb->actual_length != 4) { 603 netdev_warn(dev->net, "unexpected urb length %d\n", 604 urb->actual_length); 605 return; 606 } 607 608 intdata = get_unaligned_le32(urb->transfer_buffer); 609 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 610 611 if (intdata & INT_ENP_PHY_INT_) 612 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 613 else 614 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 615 intdata); 616 } 617 618 /* Enable or disable Tx & Rx checksum offload engines */ 619 static int smsc95xx_set_features(struct net_device *netdev, 620 netdev_features_t features) 621 { 622 struct usbnet *dev = netdev_priv(netdev); 623 u32 read_buf; 624 int ret; 625 626 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 627 if (ret < 0) 628 return ret; 629 630 if (features & NETIF_F_IP_CSUM) 631 read_buf |= Tx_COE_EN_; 632 else 633 read_buf &= ~Tx_COE_EN_; 634 635 if (features & NETIF_F_RXCSUM) 636 read_buf |= Rx_COE_EN_; 637 else 638 read_buf &= ~Rx_COE_EN_; 639 640 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 641 if (ret < 0) 642 return ret; 643 644 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 645 return 0; 646 } 647 648 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 649 { 650 return MAX_EEPROM_SIZE; 651 } 652 653 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 654 struct ethtool_eeprom *ee, u8 *data) 655 { 656 struct usbnet *dev = netdev_priv(netdev); 657 658 ee->magic = LAN95XX_EEPROM_MAGIC; 659 660 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 661 } 662 663 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 664 struct ethtool_eeprom *ee, u8 *data) 665 { 666 struct usbnet *dev = netdev_priv(netdev); 667 668 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 669 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 670 ee->magic); 671 return -EINVAL; 672 } 673 674 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 675 } 676 677 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 678 { 679 /* all smsc95xx registers */ 680 return COE_CR - ID_REV + sizeof(u32); 681 } 682 683 static void 684 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 685 void *buf) 686 { 687 struct usbnet *dev = netdev_priv(netdev); 688 unsigned int i, j; 689 int retval; 690 u32 *data = buf; 691 692 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 693 if (retval < 0) { 694 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 695 return; 696 } 697 698 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 699 retval = smsc95xx_read_reg(dev, i, &data[j]); 700 if (retval < 0) { 701 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 702 return; 703 } 704 } 705 } 706 707 static void smsc95xx_ethtool_get_wol(struct net_device *net, 708 struct ethtool_wolinfo *wolinfo) 709 { 710 struct usbnet *dev = netdev_priv(net); 711 struct smsc95xx_priv *pdata = dev->driver_priv; 712 713 wolinfo->supported = SUPPORTED_WAKE; 714 wolinfo->wolopts = pdata->wolopts; 715 } 716 717 static int smsc95xx_ethtool_set_wol(struct net_device *net, 718 struct ethtool_wolinfo *wolinfo) 719 { 720 struct usbnet *dev = netdev_priv(net); 721 struct smsc95xx_priv *pdata = dev->driver_priv; 722 int ret; 723 724 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 725 return -EINVAL; 726 727 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 728 729 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 730 if (ret < 0) 731 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 732 733 return ret; 734 } 735 736 static u32 smsc95xx_get_link(struct net_device *net) 737 { 738 phy_read_status(net->phydev); 739 return net->phydev->link; 740 } 741 742 static const struct ethtool_ops smsc95xx_ethtool_ops = { 743 .get_link = smsc95xx_get_link, 744 .nway_reset = phy_ethtool_nway_reset, 745 .get_drvinfo = usbnet_get_drvinfo, 746 .get_msglevel = usbnet_get_msglevel, 747 .set_msglevel = usbnet_set_msglevel, 748 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 749 .get_eeprom = smsc95xx_ethtool_get_eeprom, 750 .set_eeprom = smsc95xx_ethtool_set_eeprom, 751 .get_regs_len = smsc95xx_ethtool_getregslen, 752 .get_regs = smsc95xx_ethtool_getregs, 753 .get_wol = smsc95xx_ethtool_get_wol, 754 .set_wol = smsc95xx_ethtool_set_wol, 755 .get_link_ksettings = phy_ethtool_get_link_ksettings, 756 .set_link_ksettings = phy_ethtool_set_link_ksettings, 757 .get_ts_info = ethtool_op_get_ts_info, 758 }; 759 760 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 761 { 762 if (!netif_running(netdev)) 763 return -EINVAL; 764 765 return phy_mii_ioctl(netdev->phydev, rq, cmd); 766 } 767 768 static void smsc95xx_init_mac_address(struct usbnet *dev) 769 { 770 u8 addr[ETH_ALEN]; 771 772 /* maybe the boot loader passed the MAC address in devicetree */ 773 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 774 if (is_valid_ether_addr(dev->net->dev_addr)) { 775 /* device tree values are valid so use them */ 776 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 777 return; 778 } 779 } 780 781 /* try reading mac address from EEPROM */ 782 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 783 eth_hw_addr_set(dev->net, addr); 784 if (is_valid_ether_addr(dev->net->dev_addr)) { 785 /* eeprom values are valid so use them */ 786 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 787 return; 788 } 789 } 790 791 /* no useful static MAC address found. generate a random one */ 792 eth_hw_addr_random(dev->net); 793 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 794 } 795 796 static int smsc95xx_set_mac_address(struct usbnet *dev) 797 { 798 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 799 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 800 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 801 int ret; 802 803 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 804 if (ret < 0) 805 return ret; 806 807 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 808 } 809 810 /* starts the TX path */ 811 static int smsc95xx_start_tx_path(struct usbnet *dev) 812 { 813 struct smsc95xx_priv *pdata = dev->driver_priv; 814 unsigned long flags; 815 int ret; 816 817 /* Enable Tx at MAC */ 818 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 819 pdata->mac_cr |= MAC_CR_TXEN_; 820 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 821 822 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 823 if (ret < 0) 824 return ret; 825 826 /* Enable Tx at SCSRs */ 827 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 828 } 829 830 /* Starts the Receive path */ 831 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 832 { 833 struct smsc95xx_priv *pdata = dev->driver_priv; 834 unsigned long flags; 835 836 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 837 pdata->mac_cr |= MAC_CR_RXEN_; 838 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 839 840 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 841 } 842 843 static int smsc95xx_reset(struct usbnet *dev) 844 { 845 struct smsc95xx_priv *pdata = dev->driver_priv; 846 u32 read_buf, write_buf, burst_cap; 847 int ret = 0, timeout; 848 849 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 850 851 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 852 if (ret < 0) 853 return ret; 854 855 timeout = 0; 856 do { 857 msleep(10); 858 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 859 if (ret < 0) 860 return ret; 861 timeout++; 862 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 863 864 if (timeout >= 100) { 865 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 866 return ret; 867 } 868 869 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 870 if (ret < 0) 871 return ret; 872 873 timeout = 0; 874 do { 875 msleep(10); 876 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 877 if (ret < 0) 878 return ret; 879 timeout++; 880 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 881 882 if (timeout >= 100) { 883 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 884 return ret; 885 } 886 887 ret = smsc95xx_set_mac_address(dev); 888 if (ret < 0) 889 return ret; 890 891 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 892 dev->net->dev_addr); 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, "Read Value from HW_CFG : 0x%08x\n", 899 read_buf); 900 901 read_buf |= HW_CFG_BIR_; 902 903 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 904 if (ret < 0) 905 return ret; 906 907 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 908 if (ret < 0) 909 return ret; 910 911 netif_dbg(dev, ifup, dev->net, 912 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 913 read_buf); 914 915 if (!turbo_mode) { 916 burst_cap = 0; 917 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 918 } else if (dev->udev->speed == USB_SPEED_HIGH) { 919 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 920 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 921 } else { 922 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 923 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 924 } 925 926 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 927 (ulong)dev->rx_urb_size); 928 929 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 930 if (ret < 0) 931 return ret; 932 933 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 934 if (ret < 0) 935 return ret; 936 937 netif_dbg(dev, ifup, dev->net, 938 "Read Value from BURST_CAP after writing: 0x%08x\n", 939 read_buf); 940 941 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 942 if (ret < 0) 943 return ret; 944 945 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 946 if (ret < 0) 947 return ret; 948 949 netif_dbg(dev, ifup, dev->net, 950 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 951 read_buf); 952 953 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 954 if (ret < 0) 955 return ret; 956 957 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 958 read_buf); 959 960 if (turbo_mode) 961 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 962 963 read_buf &= ~HW_CFG_RXDOFF_; 964 965 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 966 read_buf |= NET_IP_ALIGN << 9; 967 968 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 969 if (ret < 0) 970 return ret; 971 972 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 973 if (ret < 0) 974 return ret; 975 976 netif_dbg(dev, ifup, dev->net, 977 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 978 979 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 980 if (ret < 0) 981 return ret; 982 983 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 984 if (ret < 0) 985 return ret; 986 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 987 988 /* Configure GPIO pins as LED outputs */ 989 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 990 LED_GPIO_CFG_FDX_LED; 991 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 992 if (ret < 0) 993 return ret; 994 995 /* Init Tx */ 996 ret = smsc95xx_write_reg(dev, FLOW, 0); 997 if (ret < 0) 998 return ret; 999 1000 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1001 if (ret < 0) 1002 return ret; 1003 1004 /* Don't need mac_cr_lock during initialisation */ 1005 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1006 if (ret < 0) 1007 return ret; 1008 1009 /* Init Rx */ 1010 /* Set Vlan */ 1011 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1012 if (ret < 0) 1013 return ret; 1014 1015 /* Enable or disable checksum offload engines */ 1016 ret = smsc95xx_set_features(dev->net, dev->net->features); 1017 if (ret < 0) { 1018 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1019 return ret; 1020 } 1021 1022 smsc95xx_set_multicast(dev->net); 1023 1024 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1025 if (ret < 0) 1026 return ret; 1027 1028 /* enable PHY interrupts */ 1029 read_buf |= INT_EP_CTL_PHY_INT_; 1030 1031 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1032 if (ret < 0) 1033 return ret; 1034 1035 ret = smsc95xx_start_tx_path(dev); 1036 if (ret < 0) { 1037 netdev_warn(dev->net, "Failed to start TX path\n"); 1038 return ret; 1039 } 1040 1041 ret = smsc95xx_start_rx_path(dev, 0); 1042 if (ret < 0) { 1043 netdev_warn(dev->net, "Failed to start RX path\n"); 1044 return ret; 1045 } 1046 1047 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1048 return 0; 1049 } 1050 1051 static const struct net_device_ops smsc95xx_netdev_ops = { 1052 .ndo_open = usbnet_open, 1053 .ndo_stop = usbnet_stop, 1054 .ndo_start_xmit = usbnet_start_xmit, 1055 .ndo_tx_timeout = usbnet_tx_timeout, 1056 .ndo_change_mtu = usbnet_change_mtu, 1057 .ndo_get_stats64 = dev_get_tstats64, 1058 .ndo_set_mac_address = eth_mac_addr, 1059 .ndo_validate_addr = eth_validate_addr, 1060 .ndo_eth_ioctl = smsc95xx_ioctl, 1061 .ndo_set_rx_mode = smsc95xx_set_multicast, 1062 .ndo_set_features = smsc95xx_set_features, 1063 }; 1064 1065 static void smsc95xx_handle_link_change(struct net_device *net) 1066 { 1067 struct usbnet *dev = netdev_priv(net); 1068 1069 phy_print_status(net->phydev); 1070 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1071 } 1072 1073 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1074 { 1075 struct smsc95xx_priv *pdata; 1076 bool is_internal_phy; 1077 u32 val; 1078 int ret; 1079 1080 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1081 1082 ret = usbnet_get_endpoints(dev, intf); 1083 if (ret < 0) { 1084 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1085 return ret; 1086 } 1087 1088 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1089 if (!pdata) 1090 return -ENOMEM; 1091 1092 dev->driver_priv = pdata; 1093 1094 spin_lock_init(&pdata->mac_cr_lock); 1095 1096 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1097 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1098 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1099 * it is transmitted as all ones. The zero transmitted checksum means 1100 * transmitter generated no checksum. Hence, enable csum offload only 1101 * for ipv4 packets. 1102 */ 1103 if (DEFAULT_TX_CSUM_ENABLE) 1104 dev->net->features |= NETIF_F_IP_CSUM; 1105 if (DEFAULT_RX_CSUM_ENABLE) 1106 dev->net->features |= NETIF_F_RXCSUM; 1107 1108 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1109 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1110 1111 smsc95xx_init_mac_address(dev); 1112 1113 /* Init all registers */ 1114 ret = smsc95xx_reset(dev); 1115 if (ret) 1116 goto free_pdata; 1117 1118 pdata->mdiobus = mdiobus_alloc(); 1119 if (!pdata->mdiobus) { 1120 ret = -ENOMEM; 1121 goto free_pdata; 1122 } 1123 1124 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1125 if (ret < 0) 1126 goto free_mdio; 1127 1128 is_internal_phy = !(val & HW_CFG_PSEL_); 1129 if (is_internal_phy) 1130 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1131 1132 pdata->mdiobus->priv = dev; 1133 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1134 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1135 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1136 pdata->mdiobus->parent = &dev->udev->dev; 1137 1138 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1139 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1140 1141 ret = mdiobus_register(pdata->mdiobus); 1142 if (ret) { 1143 netdev_err(dev->net, "Could not register MDIO bus\n"); 1144 goto free_mdio; 1145 } 1146 1147 pdata->phydev = phy_find_first(pdata->mdiobus); 1148 if (!pdata->phydev) { 1149 netdev_err(dev->net, "no PHY found\n"); 1150 ret = -ENODEV; 1151 goto unregister_mdio; 1152 } 1153 1154 pdata->phydev->is_internal = is_internal_phy; 1155 1156 /* detect device revision as different features may be available */ 1157 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1158 if (ret < 0) 1159 goto unregister_mdio; 1160 1161 val >>= 16; 1162 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1163 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1164 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1165 FEATURE_PHY_NLP_CROSSOVER | 1166 FEATURE_REMOTE_WAKEUP); 1167 else if (val == ID_REV_CHIP_ID_9512_) 1168 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1169 1170 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1171 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1172 dev->net->flags |= IFF_MULTICAST; 1173 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1174 dev->net->min_mtu = ETH_MIN_MTU; 1175 dev->net->max_mtu = ETH_DATA_LEN; 1176 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1177 1178 ret = phy_connect_direct(dev->net, pdata->phydev, 1179 &smsc95xx_handle_link_change, 1180 PHY_INTERFACE_MODE_MII); 1181 if (ret) { 1182 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1183 goto unregister_mdio; 1184 } 1185 1186 phy_attached_info(dev->net->phydev); 1187 1188 return 0; 1189 1190 unregister_mdio: 1191 mdiobus_unregister(pdata->mdiobus); 1192 1193 free_mdio: 1194 mdiobus_free(pdata->mdiobus); 1195 1196 free_pdata: 1197 kfree(pdata); 1198 return ret; 1199 } 1200 1201 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1202 { 1203 struct smsc95xx_priv *pdata = dev->driver_priv; 1204 1205 phy_disconnect(dev->net->phydev); 1206 mdiobus_unregister(pdata->mdiobus); 1207 mdiobus_free(pdata->mdiobus); 1208 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1209 kfree(pdata); 1210 } 1211 1212 static int smsc95xx_start_phy(struct usbnet *dev) 1213 { 1214 phy_start(dev->net->phydev); 1215 1216 return 0; 1217 } 1218 1219 static int smsc95xx_stop(struct usbnet *dev) 1220 { 1221 if (dev->net->phydev) 1222 phy_stop(dev->net->phydev); 1223 1224 return 0; 1225 } 1226 1227 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1228 { 1229 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1230 return crc << ((filter % 2) * 16); 1231 } 1232 1233 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1234 { 1235 int ret; 1236 1237 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1238 1239 /* read to clear */ 1240 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_SRC); 1241 if (ret < 0) 1242 return ret; 1243 1244 /* enable interrupt source */ 1245 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_MASK); 1246 if (ret < 0) 1247 return ret; 1248 1249 ret |= mask; 1250 1251 smsc95xx_mdio_write_nopm(dev, PHY_INT_MASK, ret); 1252 1253 return 0; 1254 } 1255 1256 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1257 { 1258 int ret; 1259 1260 /* first, a dummy read, needed to latch some MII phys */ 1261 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1262 if (ret < 0) 1263 return ret; 1264 1265 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1266 if (ret < 0) 1267 return ret; 1268 1269 return !!(ret & BMSR_LSTATUS); 1270 } 1271 1272 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1273 { 1274 struct smsc95xx_priv *pdata = dev->driver_priv; 1275 u32 val; 1276 int ret; 1277 1278 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1279 if (ret < 0) 1280 return ret; 1281 1282 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1283 val |= PM_CTL_SUS_MODE_0; 1284 1285 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1286 if (ret < 0) 1287 return ret; 1288 1289 /* clear wol status */ 1290 val &= ~PM_CTL_WUPS_; 1291 val |= PM_CTL_WUPS_WOL_; 1292 1293 /* enable energy detection */ 1294 if (pdata->wolopts & WAKE_PHY) 1295 val |= PM_CTL_WUPS_ED_; 1296 1297 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1298 if (ret < 0) 1299 return ret; 1300 1301 /* read back PM_CTRL */ 1302 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1303 if (ret < 0) 1304 return ret; 1305 1306 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1307 1308 return 0; 1309 } 1310 1311 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1312 { 1313 struct smsc95xx_priv *pdata = dev->driver_priv; 1314 u32 val; 1315 int ret; 1316 1317 /* reconfigure link pulse detection timing for 1318 * compatibility with non-standard link partners 1319 */ 1320 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1321 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG, 1322 PHY_EDPD_CONFIG_DEFAULT); 1323 1324 /* enable energy detect power-down mode */ 1325 ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS); 1326 if (ret < 0) 1327 return ret; 1328 1329 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1330 1331 smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret); 1332 1333 /* enter SUSPEND1 mode */ 1334 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1335 if (ret < 0) 1336 return ret; 1337 1338 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1339 val |= PM_CTL_SUS_MODE_1; 1340 1341 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1342 if (ret < 0) 1343 return ret; 1344 1345 /* clear wol status, enable energy detection */ 1346 val &= ~PM_CTL_WUPS_; 1347 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1348 1349 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1350 if (ret < 0) 1351 return ret; 1352 1353 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1354 1355 return 0; 1356 } 1357 1358 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1359 { 1360 struct smsc95xx_priv *pdata = dev->driver_priv; 1361 u32 val; 1362 int ret; 1363 1364 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1365 if (ret < 0) 1366 return ret; 1367 1368 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1369 val |= PM_CTL_SUS_MODE_2; 1370 1371 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1372 if (ret < 0) 1373 return ret; 1374 1375 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1376 1377 return 0; 1378 } 1379 1380 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1381 { 1382 struct smsc95xx_priv *pdata = dev->driver_priv; 1383 u32 val; 1384 int ret; 1385 1386 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1387 if (ret < 0) 1388 return ret; 1389 1390 if (val & RX_FIFO_INF_USED_) { 1391 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1392 return -EBUSY; 1393 } 1394 1395 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1396 if (ret < 0) 1397 return ret; 1398 1399 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1400 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1401 1402 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1403 if (ret < 0) 1404 return ret; 1405 1406 /* clear wol status */ 1407 val &= ~PM_CTL_WUPS_; 1408 val |= PM_CTL_WUPS_WOL_; 1409 1410 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1411 if (ret < 0) 1412 return ret; 1413 1414 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1415 1416 return 0; 1417 } 1418 1419 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1420 { 1421 struct smsc95xx_priv *pdata = dev->driver_priv; 1422 int ret; 1423 1424 if (!netif_running(dev->net)) { 1425 /* interface is ifconfig down so fully power down hw */ 1426 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1427 return smsc95xx_enter_suspend2(dev); 1428 } 1429 1430 if (!link_up) { 1431 /* link is down so enter EDPD mode, but only if device can 1432 * reliably resume from it. This check should be redundant 1433 * as current FEATURE_REMOTE_WAKEUP parts also support 1434 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1435 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1436 netdev_warn(dev->net, "EDPD not supported\n"); 1437 return -EBUSY; 1438 } 1439 1440 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1441 1442 /* enable PHY wakeup events for if cable is attached */ 1443 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1444 PHY_INT_MASK_ANEG_COMP_); 1445 if (ret < 0) { 1446 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1447 return ret; 1448 } 1449 1450 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1451 return smsc95xx_enter_suspend1(dev); 1452 } 1453 1454 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1455 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1456 PHY_INT_MASK_LINK_DOWN_); 1457 if (ret < 0) { 1458 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1459 return ret; 1460 } 1461 1462 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1463 return smsc95xx_enter_suspend3(dev); 1464 } 1465 1466 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1467 { 1468 struct usbnet *dev = usb_get_intfdata(intf); 1469 struct smsc95xx_priv *pdata = dev->driver_priv; 1470 u32 val, link_up; 1471 int ret; 1472 1473 ret = usbnet_suspend(intf, message); 1474 if (ret < 0) { 1475 netdev_warn(dev->net, "usbnet_suspend error\n"); 1476 return ret; 1477 } 1478 1479 if (pdata->suspend_flags) { 1480 netdev_warn(dev->net, "error during last resume\n"); 1481 pdata->suspend_flags = 0; 1482 } 1483 1484 /* determine if link is up using only _nopm functions */ 1485 link_up = smsc95xx_link_ok_nopm(dev); 1486 1487 if (message.event == PM_EVENT_AUTO_SUSPEND && 1488 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1489 ret = smsc95xx_autosuspend(dev, link_up); 1490 goto done; 1491 } 1492 1493 /* if we get this far we're not autosuspending */ 1494 /* if no wol options set, or if link is down and we're not waking on 1495 * PHY activity, enter lowest power SUSPEND2 mode 1496 */ 1497 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1498 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1499 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1500 1501 /* disable energy detect (link up) & wake up events */ 1502 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1503 if (ret < 0) 1504 goto done; 1505 1506 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1507 1508 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1509 if (ret < 0) 1510 goto done; 1511 1512 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1513 if (ret < 0) 1514 goto done; 1515 1516 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1517 1518 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1519 if (ret < 0) 1520 goto done; 1521 1522 ret = smsc95xx_enter_suspend2(dev); 1523 goto done; 1524 } 1525 1526 if (pdata->wolopts & WAKE_PHY) { 1527 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1528 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1529 if (ret < 0) { 1530 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1531 goto done; 1532 } 1533 1534 /* if link is down then configure EDPD and enter SUSPEND1, 1535 * otherwise enter SUSPEND0 below 1536 */ 1537 if (!link_up) { 1538 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1539 ret = smsc95xx_enter_suspend1(dev); 1540 goto done; 1541 } 1542 } 1543 1544 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1545 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1546 u32 command[2]; 1547 u32 offset[2]; 1548 u32 crc[4]; 1549 int wuff_filter_count = 1550 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1551 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1552 int i, filter = 0; 1553 1554 if (!filter_mask) { 1555 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1556 ret = -ENOMEM; 1557 goto done; 1558 } 1559 1560 memset(command, 0, sizeof(command)); 1561 memset(offset, 0, sizeof(offset)); 1562 memset(crc, 0, sizeof(crc)); 1563 1564 if (pdata->wolopts & WAKE_BCAST) { 1565 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1566 netdev_info(dev->net, "enabling broadcast detection\n"); 1567 filter_mask[filter * 4] = 0x003F; 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] |= 0x05UL << ((filter % 4) * 8); 1572 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1573 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1574 filter++; 1575 } 1576 1577 if (pdata->wolopts & WAKE_MCAST) { 1578 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1579 netdev_info(dev->net, "enabling multicast detection\n"); 1580 filter_mask[filter * 4] = 0x0007; 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] |= 0x09UL << ((filter % 4) * 8); 1585 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1586 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1587 filter++; 1588 } 1589 1590 if (pdata->wolopts & WAKE_ARP) { 1591 const u8 arp[] = {0x08, 0x06}; 1592 netdev_info(dev->net, "enabling ARP detection\n"); 1593 filter_mask[filter * 4] = 0x0003; 1594 filter_mask[filter * 4 + 1] = 0x00; 1595 filter_mask[filter * 4 + 2] = 0x00; 1596 filter_mask[filter * 4 + 3] = 0x00; 1597 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1598 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1599 crc[filter/2] |= smsc_crc(arp, 2, filter); 1600 filter++; 1601 } 1602 1603 if (pdata->wolopts & WAKE_UCAST) { 1604 netdev_info(dev->net, "enabling unicast detection\n"); 1605 filter_mask[filter * 4] = 0x003F; 1606 filter_mask[filter * 4 + 1] = 0x00; 1607 filter_mask[filter * 4 + 2] = 0x00; 1608 filter_mask[filter * 4 + 3] = 0x00; 1609 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1610 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1611 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1612 filter++; 1613 } 1614 1615 for (i = 0; i < (wuff_filter_count * 4); i++) { 1616 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1617 if (ret < 0) { 1618 kfree(filter_mask); 1619 goto done; 1620 } 1621 } 1622 kfree(filter_mask); 1623 1624 for (i = 0; i < (wuff_filter_count / 4); i++) { 1625 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1626 if (ret < 0) 1627 goto done; 1628 } 1629 1630 for (i = 0; i < (wuff_filter_count / 4); i++) { 1631 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1632 if (ret < 0) 1633 goto done; 1634 } 1635 1636 for (i = 0; i < (wuff_filter_count / 2); i++) { 1637 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1638 if (ret < 0) 1639 goto done; 1640 } 1641 1642 /* clear any pending pattern match packet status */ 1643 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1644 if (ret < 0) 1645 goto done; 1646 1647 val |= WUCSR_WUFR_; 1648 1649 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1650 if (ret < 0) 1651 goto done; 1652 } 1653 1654 if (pdata->wolopts & WAKE_MAGIC) { 1655 /* clear any pending magic packet status */ 1656 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1657 if (ret < 0) 1658 goto done; 1659 1660 val |= WUCSR_MPR_; 1661 1662 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1663 if (ret < 0) 1664 goto done; 1665 } 1666 1667 /* enable/disable wakeup sources */ 1668 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1669 if (ret < 0) 1670 goto done; 1671 1672 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1673 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1674 val |= WUCSR_WAKE_EN_; 1675 } else { 1676 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1677 val &= ~WUCSR_WAKE_EN_; 1678 } 1679 1680 if (pdata->wolopts & WAKE_MAGIC) { 1681 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1682 val |= WUCSR_MPEN_; 1683 } else { 1684 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1685 val &= ~WUCSR_MPEN_; 1686 } 1687 1688 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1689 if (ret < 0) 1690 goto done; 1691 1692 /* enable wol wakeup source */ 1693 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1694 if (ret < 0) 1695 goto done; 1696 1697 val |= PM_CTL_WOL_EN_; 1698 1699 /* phy energy detect wakeup source */ 1700 if (pdata->wolopts & WAKE_PHY) 1701 val |= PM_CTL_ED_EN_; 1702 1703 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1704 if (ret < 0) 1705 goto done; 1706 1707 /* enable receiver to enable frame reception */ 1708 smsc95xx_start_rx_path(dev, 1); 1709 1710 /* some wol options are enabled, so enter SUSPEND0 */ 1711 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1712 ret = smsc95xx_enter_suspend0(dev); 1713 1714 done: 1715 /* 1716 * TODO: resume() might need to handle the suspend failure 1717 * in system sleep 1718 */ 1719 if (ret && PMSG_IS_AUTO(message)) 1720 usbnet_resume(intf); 1721 1722 return ret; 1723 } 1724 1725 static int smsc95xx_resume(struct usb_interface *intf) 1726 { 1727 struct usbnet *dev = usb_get_intfdata(intf); 1728 struct smsc95xx_priv *pdata; 1729 u8 suspend_flags; 1730 int ret; 1731 u32 val; 1732 1733 BUG_ON(!dev); 1734 pdata = dev->driver_priv; 1735 suspend_flags = pdata->suspend_flags; 1736 1737 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1738 1739 /* do this first to ensure it's cleared even in error case */ 1740 pdata->suspend_flags = 0; 1741 1742 if (suspend_flags & SUSPEND_ALLMODES) { 1743 /* clear wake-up sources */ 1744 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1745 if (ret < 0) 1746 return ret; 1747 1748 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1749 1750 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1751 if (ret < 0) 1752 return ret; 1753 1754 /* clear wake-up status */ 1755 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1756 if (ret < 0) 1757 return ret; 1758 1759 val &= ~PM_CTL_WOL_EN_; 1760 val |= PM_CTL_WUPS_; 1761 1762 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1763 if (ret < 0) 1764 return ret; 1765 } 1766 1767 ret = usbnet_resume(intf); 1768 if (ret < 0) 1769 netdev_warn(dev->net, "usbnet_resume error\n"); 1770 1771 phy_init_hw(pdata->phydev); 1772 return ret; 1773 } 1774 1775 static int smsc95xx_reset_resume(struct usb_interface *intf) 1776 { 1777 struct usbnet *dev = usb_get_intfdata(intf); 1778 int ret; 1779 1780 ret = smsc95xx_reset(dev); 1781 if (ret < 0) 1782 return ret; 1783 1784 return smsc95xx_resume(intf); 1785 } 1786 1787 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1788 { 1789 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1790 skb->ip_summed = CHECKSUM_COMPLETE; 1791 skb_trim(skb, skb->len - 2); 1792 } 1793 1794 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1795 { 1796 /* This check is no longer done by usbnet */ 1797 if (skb->len < dev->net->hard_header_len) 1798 return 0; 1799 1800 while (skb->len > 0) { 1801 u32 header, align_count; 1802 struct sk_buff *ax_skb; 1803 unsigned char *packet; 1804 u16 size; 1805 1806 header = get_unaligned_le32(skb->data); 1807 skb_pull(skb, 4 + NET_IP_ALIGN); 1808 packet = skb->data; 1809 1810 /* get the packet length */ 1811 size = (u16)((header & RX_STS_FL_) >> 16); 1812 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1813 1814 if (unlikely(header & RX_STS_ES_)) { 1815 netif_dbg(dev, rx_err, dev->net, 1816 "Error header=0x%08x\n", header); 1817 dev->net->stats.rx_errors++; 1818 dev->net->stats.rx_dropped++; 1819 1820 if (header & RX_STS_CRC_) { 1821 dev->net->stats.rx_crc_errors++; 1822 } else { 1823 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1824 dev->net->stats.rx_frame_errors++; 1825 1826 if ((header & RX_STS_LE_) && 1827 (!(header & RX_STS_FT_))) 1828 dev->net->stats.rx_length_errors++; 1829 } 1830 } else { 1831 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1832 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1833 netif_dbg(dev, rx_err, dev->net, 1834 "size err header=0x%08x\n", header); 1835 return 0; 1836 } 1837 1838 /* last frame in this batch */ 1839 if (skb->len == size) { 1840 if (dev->net->features & NETIF_F_RXCSUM) 1841 smsc95xx_rx_csum_offload(skb); 1842 skb_trim(skb, skb->len - 4); /* remove fcs */ 1843 skb->truesize = size + sizeof(struct sk_buff); 1844 1845 return 1; 1846 } 1847 1848 ax_skb = skb_clone(skb, GFP_ATOMIC); 1849 if (unlikely(!ax_skb)) { 1850 netdev_warn(dev->net, "Error allocating skb\n"); 1851 return 0; 1852 } 1853 1854 ax_skb->len = size; 1855 ax_skb->data = packet; 1856 skb_set_tail_pointer(ax_skb, size); 1857 1858 if (dev->net->features & NETIF_F_RXCSUM) 1859 smsc95xx_rx_csum_offload(ax_skb); 1860 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1861 ax_skb->truesize = size + sizeof(struct sk_buff); 1862 1863 usbnet_skb_return(dev, ax_skb); 1864 } 1865 1866 skb_pull(skb, size); 1867 1868 /* padding bytes before the next frame starts */ 1869 if (skb->len) 1870 skb_pull(skb, align_count); 1871 } 1872 1873 return 1; 1874 } 1875 1876 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1877 { 1878 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1879 u16 high_16 = low_16 + skb->csum_offset; 1880 return (high_16 << 16) | low_16; 1881 } 1882 1883 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1884 * transmission. This is fairly unlikely, only seems to trigger with some 1885 * short TCP ACK packets sent. 1886 * 1887 * Note, this calculation should probably check for the alignment of the 1888 * data as well, but a straight check for csum being in the last four bytes 1889 * of the packet should be ok for now. 1890 */ 1891 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1892 { 1893 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1894 1895 if (skb->len <= 45) 1896 return false; 1897 return skb->csum_offset < (len - (4 + 1)); 1898 } 1899 1900 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1901 struct sk_buff *skb, gfp_t flags) 1902 { 1903 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1904 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1905 u32 tx_cmd_a, tx_cmd_b; 1906 void *ptr; 1907 1908 /* We do not advertise SG, so skbs should be already linearized */ 1909 BUG_ON(skb_shinfo(skb)->nr_frags); 1910 1911 /* Make writable and expand header space by overhead if required */ 1912 if (skb_cow_head(skb, overhead)) { 1913 /* Must deallocate here as returning NULL to indicate error 1914 * means the skb won't be deallocated in the caller. 1915 */ 1916 dev_kfree_skb_any(skb); 1917 return NULL; 1918 } 1919 1920 tx_cmd_b = (u32)skb->len; 1921 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1922 1923 if (csum) { 1924 if (!smsc95xx_can_tx_checksum(skb)) { 1925 /* workaround - hardware tx checksum does not work 1926 * properly with extremely small packets */ 1927 long csstart = skb_checksum_start_offset(skb); 1928 __wsum calc = csum_partial(skb->data + csstart, 1929 skb->len - csstart, 0); 1930 *((__sum16 *)(skb->data + csstart 1931 + skb->csum_offset)) = csum_fold(calc); 1932 1933 csum = false; 1934 } else { 1935 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1936 ptr = skb_push(skb, 4); 1937 put_unaligned_le32(csum_preamble, ptr); 1938 1939 tx_cmd_a += 4; 1940 tx_cmd_b += 4; 1941 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1942 } 1943 } 1944 1945 ptr = skb_push(skb, 8); 1946 put_unaligned_le32(tx_cmd_a, ptr); 1947 put_unaligned_le32(tx_cmd_b, ptr+4); 1948 1949 return skb; 1950 } 1951 1952 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1953 { 1954 struct smsc95xx_priv *pdata = dev->driver_priv; 1955 1956 dev->intf->needs_remote_wakeup = on; 1957 1958 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1959 return 0; 1960 1961 /* this chip revision isn't capable of remote wakeup */ 1962 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1963 1964 if (on) 1965 usb_autopm_get_interface_no_resume(dev->intf); 1966 else 1967 usb_autopm_put_interface(dev->intf); 1968 1969 return 0; 1970 } 1971 1972 static const struct driver_info smsc95xx_info = { 1973 .description = "smsc95xx USB 2.0 Ethernet", 1974 .bind = smsc95xx_bind, 1975 .unbind = smsc95xx_unbind, 1976 .link_reset = smsc95xx_link_reset, 1977 .reset = smsc95xx_reset, 1978 .check_connect = smsc95xx_start_phy, 1979 .stop = smsc95xx_stop, 1980 .rx_fixup = smsc95xx_rx_fixup, 1981 .tx_fixup = smsc95xx_tx_fixup, 1982 .status = smsc95xx_status, 1983 .manage_power = smsc95xx_manage_power, 1984 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 1985 }; 1986 1987 static const struct usb_device_id products[] = { 1988 { 1989 /* SMSC9500 USB Ethernet Device */ 1990 USB_DEVICE(0x0424, 0x9500), 1991 .driver_info = (unsigned long) &smsc95xx_info, 1992 }, 1993 { 1994 /* SMSC9505 USB Ethernet Device */ 1995 USB_DEVICE(0x0424, 0x9505), 1996 .driver_info = (unsigned long) &smsc95xx_info, 1997 }, 1998 { 1999 /* SMSC9500A USB Ethernet Device */ 2000 USB_DEVICE(0x0424, 0x9E00), 2001 .driver_info = (unsigned long) &smsc95xx_info, 2002 }, 2003 { 2004 /* SMSC9505A USB Ethernet Device */ 2005 USB_DEVICE(0x0424, 0x9E01), 2006 .driver_info = (unsigned long) &smsc95xx_info, 2007 }, 2008 { 2009 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2010 USB_DEVICE(0x0424, 0xec00), 2011 .driver_info = (unsigned long) &smsc95xx_info, 2012 }, 2013 { 2014 /* SMSC9500 USB Ethernet Device (SAL10) */ 2015 USB_DEVICE(0x0424, 0x9900), 2016 .driver_info = (unsigned long) &smsc95xx_info, 2017 }, 2018 { 2019 /* SMSC9505 USB Ethernet Device (SAL10) */ 2020 USB_DEVICE(0x0424, 0x9901), 2021 .driver_info = (unsigned long) &smsc95xx_info, 2022 }, 2023 { 2024 /* SMSC9500A USB Ethernet Device (SAL10) */ 2025 USB_DEVICE(0x0424, 0x9902), 2026 .driver_info = (unsigned long) &smsc95xx_info, 2027 }, 2028 { 2029 /* SMSC9505A USB Ethernet Device (SAL10) */ 2030 USB_DEVICE(0x0424, 0x9903), 2031 .driver_info = (unsigned long) &smsc95xx_info, 2032 }, 2033 { 2034 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2035 USB_DEVICE(0x0424, 0x9904), 2036 .driver_info = (unsigned long) &smsc95xx_info, 2037 }, 2038 { 2039 /* SMSC9500A USB Ethernet Device (HAL) */ 2040 USB_DEVICE(0x0424, 0x9905), 2041 .driver_info = (unsigned long) &smsc95xx_info, 2042 }, 2043 { 2044 /* SMSC9505A USB Ethernet Device (HAL) */ 2045 USB_DEVICE(0x0424, 0x9906), 2046 .driver_info = (unsigned long) &smsc95xx_info, 2047 }, 2048 { 2049 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2050 USB_DEVICE(0x0424, 0x9907), 2051 .driver_info = (unsigned long) &smsc95xx_info, 2052 }, 2053 { 2054 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2055 USB_DEVICE(0x0424, 0x9908), 2056 .driver_info = (unsigned long) &smsc95xx_info, 2057 }, 2058 { 2059 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2060 USB_DEVICE(0x0424, 0x9909), 2061 .driver_info = (unsigned long) &smsc95xx_info, 2062 }, 2063 { 2064 /* SMSC LAN9530 USB Ethernet Device */ 2065 USB_DEVICE(0x0424, 0x9530), 2066 .driver_info = (unsigned long) &smsc95xx_info, 2067 }, 2068 { 2069 /* SMSC LAN9730 USB Ethernet Device */ 2070 USB_DEVICE(0x0424, 0x9730), 2071 .driver_info = (unsigned long) &smsc95xx_info, 2072 }, 2073 { 2074 /* SMSC LAN89530 USB Ethernet Device */ 2075 USB_DEVICE(0x0424, 0x9E08), 2076 .driver_info = (unsigned long) &smsc95xx_info, 2077 }, 2078 { }, /* END */ 2079 }; 2080 MODULE_DEVICE_TABLE(usb, products); 2081 2082 static struct usb_driver smsc95xx_driver = { 2083 .name = "smsc95xx", 2084 .id_table = products, 2085 .probe = usbnet_probe, 2086 .suspend = smsc95xx_suspend, 2087 .resume = smsc95xx_resume, 2088 .reset_resume = smsc95xx_reset_resume, 2089 .disconnect = usbnet_disconnect, 2090 .disable_hub_initiated_lpm = 1, 2091 .supports_autosuspend = 1, 2092 }; 2093 2094 module_usb_driver(smsc95xx_driver); 2095 2096 MODULE_AUTHOR("Nancy Lin"); 2097 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2098 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2099 MODULE_LICENSE("GPL"); 2100