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 <net/selftests.h> 24 25 #include "smsc95xx.h" 26 27 #define SMSC_CHIPNAME "smsc95xx" 28 #define SMSC_DRIVER_VERSION "2.0.0" 29 #define HS_USB_PKT_SIZE (512) 30 #define FS_USB_PKT_SIZE (64) 31 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) 32 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) 33 #define DEFAULT_BULK_IN_DELAY (0x00002000) 34 #define MAX_SINGLE_PACKET_SIZE (2048) 35 #define LAN95XX_EEPROM_MAGIC (0x9500) 36 #define EEPROM_MAC_OFFSET (0x01) 37 #define DEFAULT_TX_CSUM_ENABLE (true) 38 #define DEFAULT_RX_CSUM_ENABLE (true) 39 #define SMSC95XX_INTERNAL_PHY_ID (1) 40 #define SMSC95XX_TX_OVERHEAD (8) 41 #define SMSC95XX_TX_OVERHEAD_CSUM (12) 42 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ 43 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) 44 45 #define FEATURE_8_WAKEUP_FILTERS (0x01) 46 #define FEATURE_PHY_NLP_CROSSOVER (0x02) 47 #define FEATURE_REMOTE_WAKEUP (0x04) 48 49 #define SUSPEND_SUSPEND0 (0x01) 50 #define SUSPEND_SUSPEND1 (0x02) 51 #define SUSPEND_SUSPEND2 (0x04) 52 #define SUSPEND_SUSPEND3 (0x08) 53 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ 54 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) 55 56 struct smsc95xx_priv { 57 u32 mac_cr; 58 u32 hash_hi; 59 u32 hash_lo; 60 u32 wolopts; 61 spinlock_t mac_cr_lock; 62 u8 features; 63 u8 suspend_flags; 64 struct mii_bus *mdiobus; 65 struct phy_device *phydev; 66 }; 67 68 static bool turbo_mode = true; 69 module_param(turbo_mode, bool, 0644); 70 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 71 72 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index, 73 u32 *data, int in_pm) 74 { 75 u32 buf; 76 int ret; 77 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 78 79 BUG_ON(!dev); 80 81 if (!in_pm) 82 fn = usbnet_read_cmd; 83 else 84 fn = usbnet_read_cmd_nopm; 85 86 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 87 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 88 0, index, &buf, 4); 89 if (ret < 0) { 90 if (ret != -ENODEV) 91 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 92 index, ret); 93 return ret; 94 } 95 96 le32_to_cpus(&buf); 97 *data = buf; 98 99 return ret; 100 } 101 102 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index, 103 u32 data, int in_pm) 104 { 105 u32 buf; 106 int ret; 107 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 108 109 BUG_ON(!dev); 110 111 if (!in_pm) 112 fn = usbnet_write_cmd; 113 else 114 fn = usbnet_write_cmd_nopm; 115 116 buf = data; 117 cpu_to_le32s(&buf); 118 119 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 120 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 121 0, index, &buf, 4); 122 if (ret < 0 && ret != -ENODEV) 123 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 124 index, ret); 125 126 return ret; 127 } 128 129 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index, 130 u32 *data) 131 { 132 return __smsc95xx_read_reg(dev, index, data, 1); 133 } 134 135 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index, 136 u32 data) 137 { 138 return __smsc95xx_write_reg(dev, index, data, 1); 139 } 140 141 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 142 u32 *data) 143 { 144 return __smsc95xx_read_reg(dev, index, data, 0); 145 } 146 147 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 148 u32 data) 149 { 150 return __smsc95xx_write_reg(dev, index, data, 0); 151 } 152 153 /* Loop until the read is completed with timeout 154 * called with phy_mutex held */ 155 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev, 156 int in_pm) 157 { 158 unsigned long start_time = jiffies; 159 u32 val; 160 int ret; 161 162 do { 163 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm); 164 if (ret < 0) { 165 /* Ignore -ENODEV error during disconnect() */ 166 if (ret == -ENODEV) 167 return 0; 168 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 169 return ret; 170 } 171 172 if (!(val & MII_BUSY_)) 173 return 0; 174 } while (!time_after(jiffies, start_time + HZ)); 175 176 return -EIO; 177 } 178 179 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 180 { 181 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 182 } 183 184 static int __smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx, 185 int in_pm) 186 { 187 u32 val, addr; 188 int ret; 189 190 mutex_lock(&dev->phy_mutex); 191 192 /* confirm MII not busy */ 193 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 194 if (ret < 0) { 195 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 196 goto done; 197 } 198 199 /* set the address, index & direction (read from PHY) */ 200 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 201 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 202 if (ret < 0) { 203 if (ret != -ENODEV) 204 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 205 goto done; 206 } 207 208 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 209 if (ret < 0) { 210 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 211 goto done; 212 } 213 214 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm); 215 if (ret < 0) { 216 if (ret != -ENODEV) 217 netdev_warn(dev->net, "Error reading MII_DATA\n"); 218 goto done; 219 } 220 221 ret = (u16)(val & 0xFFFF); 222 223 done: 224 mutex_unlock(&dev->phy_mutex); 225 226 /* Ignore -ENODEV error during disconnect() */ 227 if (ret == -ENODEV) 228 return 0; 229 return ret; 230 } 231 232 static void __smsc95xx_mdio_write(struct usbnet *dev, int phy_id, 233 int idx, int regval, int in_pm) 234 { 235 u32 val, addr; 236 int ret; 237 238 mutex_lock(&dev->phy_mutex); 239 240 /* confirm MII not busy */ 241 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 242 if (ret < 0) { 243 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 244 goto done; 245 } 246 247 val = regval; 248 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm); 249 if (ret < 0) { 250 if (ret != -ENODEV) 251 netdev_warn(dev->net, "Error writing MII_DATA\n"); 252 goto done; 253 } 254 255 /* set the address, index & direction (write to PHY) */ 256 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 257 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 258 if (ret < 0) { 259 if (ret != -ENODEV) 260 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 261 goto done; 262 } 263 264 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 265 if (ret < 0) { 266 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 267 goto done; 268 } 269 270 done: 271 mutex_unlock(&dev->phy_mutex); 272 } 273 274 static int smsc95xx_mdio_read_nopm(struct usbnet *dev, int idx) 275 { 276 struct smsc95xx_priv *pdata = dev->driver_priv; 277 278 return __smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, idx, 1); 279 } 280 281 static void smsc95xx_mdio_write_nopm(struct usbnet *dev, int idx, int regval) 282 { 283 struct smsc95xx_priv *pdata = dev->driver_priv; 284 285 __smsc95xx_mdio_write(dev, pdata->phydev->mdio.addr, idx, regval, 1); 286 } 287 288 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 289 { 290 struct usbnet *dev = bus->priv; 291 292 return __smsc95xx_mdio_read(dev, phy_id, idx, 0); 293 } 294 295 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 296 u16 regval) 297 { 298 struct usbnet *dev = bus->priv; 299 300 __smsc95xx_mdio_write(dev, phy_id, idx, regval, 0); 301 return 0; 302 } 303 304 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 305 { 306 unsigned long start_time = jiffies; 307 u32 val; 308 int ret; 309 310 do { 311 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 312 if (ret < 0) { 313 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 314 return ret; 315 } 316 317 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 318 break; 319 udelay(40); 320 } while (!time_after(jiffies, start_time + HZ)); 321 322 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 323 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 324 return -EIO; 325 } 326 327 return 0; 328 } 329 330 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 331 { 332 unsigned long start_time = jiffies; 333 u32 val; 334 int ret; 335 336 do { 337 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 338 if (ret < 0) { 339 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 340 return ret; 341 } 342 343 if (!(val & E2P_CMD_BUSY_)) 344 return 0; 345 346 udelay(40); 347 } while (!time_after(jiffies, start_time + HZ)); 348 349 netdev_warn(dev->net, "EEPROM is busy\n"); 350 return -EIO; 351 } 352 353 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 354 u8 *data) 355 { 356 u32 val; 357 int i, ret; 358 359 BUG_ON(!dev); 360 BUG_ON(!data); 361 362 ret = smsc95xx_eeprom_confirm_not_busy(dev); 363 if (ret) 364 return ret; 365 366 for (i = 0; i < length; i++) { 367 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 368 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 369 if (ret < 0) { 370 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 371 return ret; 372 } 373 374 ret = smsc95xx_wait_eeprom(dev); 375 if (ret < 0) 376 return ret; 377 378 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 379 if (ret < 0) { 380 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 381 return ret; 382 } 383 384 data[i] = val & 0xFF; 385 offset++; 386 } 387 388 return 0; 389 } 390 391 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 392 u8 *data) 393 { 394 u32 val; 395 int i, ret; 396 397 BUG_ON(!dev); 398 BUG_ON(!data); 399 400 ret = smsc95xx_eeprom_confirm_not_busy(dev); 401 if (ret) 402 return ret; 403 404 /* Issue write/erase enable command */ 405 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 406 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 407 if (ret < 0) { 408 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 409 return ret; 410 } 411 412 ret = smsc95xx_wait_eeprom(dev); 413 if (ret < 0) 414 return ret; 415 416 for (i = 0; i < length; i++) { 417 418 /* Fill data register */ 419 val = data[i]; 420 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 421 if (ret < 0) { 422 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 423 return ret; 424 } 425 426 /* Send "write" command */ 427 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 428 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 429 if (ret < 0) { 430 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 431 return ret; 432 } 433 434 ret = smsc95xx_wait_eeprom(dev); 435 if (ret < 0) 436 return ret; 437 438 offset++; 439 } 440 441 return 0; 442 } 443 444 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 445 u32 data) 446 { 447 const u16 size = 4; 448 u32 buf; 449 int ret; 450 451 buf = data; 452 cpu_to_le32s(&buf); 453 454 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 455 USB_DIR_OUT | USB_TYPE_VENDOR | 456 USB_RECIP_DEVICE, 457 0, index, &buf, size); 458 if (ret < 0) 459 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 460 ret); 461 return ret; 462 } 463 464 /* returns hash bit number for given MAC address 465 * example: 466 * 01 00 5E 00 00 01 -> returns bit number 31 */ 467 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 468 { 469 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 470 } 471 472 static void smsc95xx_set_multicast(struct net_device *netdev) 473 { 474 struct usbnet *dev = netdev_priv(netdev); 475 struct smsc95xx_priv *pdata = dev->driver_priv; 476 unsigned long flags; 477 int ret; 478 479 pdata->hash_hi = 0; 480 pdata->hash_lo = 0; 481 482 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 483 484 if (dev->net->flags & IFF_PROMISC) { 485 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 486 pdata->mac_cr |= MAC_CR_PRMS_; 487 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 488 } else if (dev->net->flags & IFF_ALLMULTI) { 489 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 490 pdata->mac_cr |= MAC_CR_MCPAS_; 491 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 492 } else if (!netdev_mc_empty(dev->net)) { 493 struct netdev_hw_addr *ha; 494 495 pdata->mac_cr |= MAC_CR_HPFILT_; 496 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 497 498 netdev_for_each_mc_addr(ha, netdev) { 499 u32 bitnum = smsc95xx_hash(ha->addr); 500 u32 mask = 0x01 << (bitnum & 0x1F); 501 if (bitnum & 0x20) 502 pdata->hash_hi |= mask; 503 else 504 pdata->hash_lo |= mask; 505 } 506 507 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 508 pdata->hash_hi, pdata->hash_lo); 509 } else { 510 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 511 pdata->mac_cr &= 512 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 513 } 514 515 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 516 517 /* Initiate async writes, as we can't wait for completion here */ 518 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 519 if (ret < 0) 520 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 521 522 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 523 if (ret < 0) 524 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 525 526 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 527 if (ret < 0) 528 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 529 } 530 531 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 532 { 533 u32 flow = 0, afc_cfg; 534 struct smsc95xx_priv *pdata = dev->driver_priv; 535 bool tx_pause, rx_pause; 536 537 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 538 if (ret < 0) 539 return ret; 540 541 if (pdata->phydev->duplex == DUPLEX_FULL) { 542 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 543 544 if (rx_pause) 545 flow = 0xFFFF0002; 546 547 if (tx_pause) { 548 afc_cfg |= 0xF; 549 flow |= 0xFFFF0000; 550 } else { 551 afc_cfg &= ~0xF; 552 } 553 554 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 555 rx_pause ? "enabled" : "disabled", 556 tx_pause ? "enabled" : "disabled"); 557 } else { 558 netif_dbg(dev, link, dev->net, "half duplex\n"); 559 afc_cfg |= 0xF; 560 } 561 562 ret = smsc95xx_write_reg(dev, FLOW, flow); 563 if (ret < 0) 564 return ret; 565 566 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 567 } 568 569 static int smsc95xx_link_reset(struct usbnet *dev) 570 { 571 struct smsc95xx_priv *pdata = dev->driver_priv; 572 unsigned long flags; 573 int ret; 574 575 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 576 if (ret < 0) 577 return ret; 578 579 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 580 if (pdata->phydev->duplex != DUPLEX_FULL) { 581 pdata->mac_cr &= ~MAC_CR_FDPX_; 582 pdata->mac_cr |= MAC_CR_RCVOWN_; 583 } else { 584 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 585 pdata->mac_cr |= MAC_CR_FDPX_; 586 } 587 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 588 589 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 590 if (ret < 0) 591 return ret; 592 593 ret = smsc95xx_phy_update_flowcontrol(dev); 594 if (ret < 0) 595 netdev_warn(dev->net, "Error updating PHY flow control\n"); 596 597 return ret; 598 } 599 600 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 601 { 602 u32 intdata; 603 604 if (urb->actual_length != 4) { 605 netdev_warn(dev->net, "unexpected urb length %d\n", 606 urb->actual_length); 607 return; 608 } 609 610 intdata = get_unaligned_le32(urb->transfer_buffer); 611 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 612 613 if (intdata & INT_ENP_PHY_INT_) 614 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 615 else 616 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 617 intdata); 618 } 619 620 /* Enable or disable Tx & Rx checksum offload engines */ 621 static int smsc95xx_set_features(struct net_device *netdev, 622 netdev_features_t features) 623 { 624 struct usbnet *dev = netdev_priv(netdev); 625 u32 read_buf; 626 int ret; 627 628 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 629 if (ret < 0) 630 return ret; 631 632 if (features & NETIF_F_IP_CSUM) 633 read_buf |= Tx_COE_EN_; 634 else 635 read_buf &= ~Tx_COE_EN_; 636 637 if (features & NETIF_F_RXCSUM) 638 read_buf |= Rx_COE_EN_; 639 else 640 read_buf &= ~Rx_COE_EN_; 641 642 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 643 if (ret < 0) 644 return ret; 645 646 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 647 return 0; 648 } 649 650 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 651 { 652 return MAX_EEPROM_SIZE; 653 } 654 655 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 656 struct ethtool_eeprom *ee, u8 *data) 657 { 658 struct usbnet *dev = netdev_priv(netdev); 659 660 ee->magic = LAN95XX_EEPROM_MAGIC; 661 662 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 663 } 664 665 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 666 struct ethtool_eeprom *ee, u8 *data) 667 { 668 struct usbnet *dev = netdev_priv(netdev); 669 670 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 671 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 672 ee->magic); 673 return -EINVAL; 674 } 675 676 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 677 } 678 679 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 680 { 681 /* all smsc95xx registers */ 682 return COE_CR - ID_REV + sizeof(u32); 683 } 684 685 static void 686 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 687 void *buf) 688 { 689 struct usbnet *dev = netdev_priv(netdev); 690 unsigned int i, j; 691 int retval; 692 u32 *data = buf; 693 694 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 695 if (retval < 0) { 696 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 697 return; 698 } 699 700 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 701 retval = smsc95xx_read_reg(dev, i, &data[j]); 702 if (retval < 0) { 703 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 704 return; 705 } 706 } 707 } 708 709 static void smsc95xx_ethtool_get_wol(struct net_device *net, 710 struct ethtool_wolinfo *wolinfo) 711 { 712 struct usbnet *dev = netdev_priv(net); 713 struct smsc95xx_priv *pdata = dev->driver_priv; 714 715 wolinfo->supported = SUPPORTED_WAKE; 716 wolinfo->wolopts = pdata->wolopts; 717 } 718 719 static int smsc95xx_ethtool_set_wol(struct net_device *net, 720 struct ethtool_wolinfo *wolinfo) 721 { 722 struct usbnet *dev = netdev_priv(net); 723 struct smsc95xx_priv *pdata = dev->driver_priv; 724 int ret; 725 726 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 727 return -EINVAL; 728 729 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 730 731 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 732 if (ret < 0) 733 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 734 735 return ret; 736 } 737 738 static u32 smsc95xx_get_link(struct net_device *net) 739 { 740 phy_read_status(net->phydev); 741 return net->phydev->link; 742 } 743 744 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, 745 u8 *data) 746 { 747 switch (sset) { 748 case ETH_SS_TEST: 749 net_selftest_get_strings(data); 750 break; 751 } 752 } 753 754 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) 755 { 756 switch (sset) { 757 case ETH_SS_TEST: 758 return net_selftest_get_count(); 759 default: 760 return -EOPNOTSUPP; 761 } 762 } 763 764 static const struct ethtool_ops smsc95xx_ethtool_ops = { 765 .get_link = smsc95xx_get_link, 766 .nway_reset = phy_ethtool_nway_reset, 767 .get_drvinfo = usbnet_get_drvinfo, 768 .get_msglevel = usbnet_get_msglevel, 769 .set_msglevel = usbnet_set_msglevel, 770 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 771 .get_eeprom = smsc95xx_ethtool_get_eeprom, 772 .set_eeprom = smsc95xx_ethtool_set_eeprom, 773 .get_regs_len = smsc95xx_ethtool_getregslen, 774 .get_regs = smsc95xx_ethtool_getregs, 775 .get_wol = smsc95xx_ethtool_get_wol, 776 .set_wol = smsc95xx_ethtool_set_wol, 777 .get_link_ksettings = phy_ethtool_get_link_ksettings, 778 .set_link_ksettings = phy_ethtool_set_link_ksettings, 779 .get_ts_info = ethtool_op_get_ts_info, 780 .self_test = net_selftest, 781 .get_strings = smsc95xx_ethtool_get_strings, 782 .get_sset_count = smsc95xx_ethtool_get_sset_count, 783 }; 784 785 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 786 { 787 if (!netif_running(netdev)) 788 return -EINVAL; 789 790 return phy_mii_ioctl(netdev->phydev, rq, cmd); 791 } 792 793 static void smsc95xx_init_mac_address(struct usbnet *dev) 794 { 795 u8 addr[ETH_ALEN]; 796 797 /* maybe the boot loader passed the MAC address in devicetree */ 798 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 799 if (is_valid_ether_addr(dev->net->dev_addr)) { 800 /* device tree values are valid so use them */ 801 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 802 return; 803 } 804 } 805 806 /* try reading mac address from EEPROM */ 807 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 808 eth_hw_addr_set(dev->net, addr); 809 if (is_valid_ether_addr(dev->net->dev_addr)) { 810 /* eeprom values are valid so use them */ 811 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 812 return; 813 } 814 } 815 816 /* no useful static MAC address found. generate a random one */ 817 eth_hw_addr_random(dev->net); 818 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 819 } 820 821 static int smsc95xx_set_mac_address(struct usbnet *dev) 822 { 823 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 824 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 825 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 826 int ret; 827 828 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 829 if (ret < 0) 830 return ret; 831 832 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 833 } 834 835 /* starts the TX path */ 836 static int smsc95xx_start_tx_path(struct usbnet *dev) 837 { 838 struct smsc95xx_priv *pdata = dev->driver_priv; 839 unsigned long flags; 840 int ret; 841 842 /* Enable Tx at MAC */ 843 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 844 pdata->mac_cr |= MAC_CR_TXEN_; 845 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 846 847 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 848 if (ret < 0) 849 return ret; 850 851 /* Enable Tx at SCSRs */ 852 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 853 } 854 855 /* Starts the Receive path */ 856 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 857 { 858 struct smsc95xx_priv *pdata = dev->driver_priv; 859 unsigned long flags; 860 861 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 862 pdata->mac_cr |= MAC_CR_RXEN_; 863 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 864 865 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 866 } 867 868 static int smsc95xx_reset(struct usbnet *dev) 869 { 870 struct smsc95xx_priv *pdata = dev->driver_priv; 871 u32 read_buf, write_buf, burst_cap; 872 int ret = 0, timeout; 873 874 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 875 876 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 877 if (ret < 0) 878 return ret; 879 880 timeout = 0; 881 do { 882 msleep(10); 883 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 884 if (ret < 0) 885 return ret; 886 timeout++; 887 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 888 889 if (timeout >= 100) { 890 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 891 return ret; 892 } 893 894 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 895 if (ret < 0) 896 return ret; 897 898 timeout = 0; 899 do { 900 msleep(10); 901 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 902 if (ret < 0) 903 return ret; 904 timeout++; 905 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 906 907 if (timeout >= 100) { 908 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 909 return ret; 910 } 911 912 ret = smsc95xx_set_mac_address(dev); 913 if (ret < 0) 914 return ret; 915 916 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 917 dev->net->dev_addr); 918 919 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 920 if (ret < 0) 921 return ret; 922 923 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 924 read_buf); 925 926 read_buf |= HW_CFG_BIR_; 927 928 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 929 if (ret < 0) 930 return ret; 931 932 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 933 if (ret < 0) 934 return ret; 935 936 netif_dbg(dev, ifup, dev->net, 937 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 938 read_buf); 939 940 if (!turbo_mode) { 941 burst_cap = 0; 942 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 943 } else if (dev->udev->speed == USB_SPEED_HIGH) { 944 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 945 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 946 } else { 947 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 948 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 949 } 950 951 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 952 (ulong)dev->rx_urb_size); 953 954 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 955 if (ret < 0) 956 return ret; 957 958 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 959 if (ret < 0) 960 return ret; 961 962 netif_dbg(dev, ifup, dev->net, 963 "Read Value from BURST_CAP after writing: 0x%08x\n", 964 read_buf); 965 966 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 967 if (ret < 0) 968 return ret; 969 970 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 971 if (ret < 0) 972 return ret; 973 974 netif_dbg(dev, ifup, dev->net, 975 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 976 read_buf); 977 978 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 979 if (ret < 0) 980 return ret; 981 982 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 983 read_buf); 984 985 if (turbo_mode) 986 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 987 988 read_buf &= ~HW_CFG_RXDOFF_; 989 990 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 991 read_buf |= NET_IP_ALIGN << 9; 992 993 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 994 if (ret < 0) 995 return ret; 996 997 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 998 if (ret < 0) 999 return ret; 1000 1001 netif_dbg(dev, ifup, dev->net, 1002 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 1003 1004 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 1005 if (ret < 0) 1006 return ret; 1007 1008 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1009 if (ret < 0) 1010 return ret; 1011 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1012 1013 /* Configure GPIO pins as LED outputs */ 1014 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1015 LED_GPIO_CFG_FDX_LED; 1016 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 1017 if (ret < 0) 1018 return ret; 1019 1020 /* Init Tx */ 1021 ret = smsc95xx_write_reg(dev, FLOW, 0); 1022 if (ret < 0) 1023 return ret; 1024 1025 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1026 if (ret < 0) 1027 return ret; 1028 1029 /* Don't need mac_cr_lock during initialisation */ 1030 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1031 if (ret < 0) 1032 return ret; 1033 1034 /* Init Rx */ 1035 /* Set Vlan */ 1036 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1037 if (ret < 0) 1038 return ret; 1039 1040 /* Enable or disable checksum offload engines */ 1041 ret = smsc95xx_set_features(dev->net, dev->net->features); 1042 if (ret < 0) { 1043 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1044 return ret; 1045 } 1046 1047 smsc95xx_set_multicast(dev->net); 1048 1049 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1050 if (ret < 0) 1051 return ret; 1052 1053 /* enable PHY interrupts */ 1054 read_buf |= INT_EP_CTL_PHY_INT_; 1055 1056 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1057 if (ret < 0) 1058 return ret; 1059 1060 ret = smsc95xx_start_tx_path(dev); 1061 if (ret < 0) { 1062 netdev_warn(dev->net, "Failed to start TX path\n"); 1063 return ret; 1064 } 1065 1066 ret = smsc95xx_start_rx_path(dev, 0); 1067 if (ret < 0) { 1068 netdev_warn(dev->net, "Failed to start RX path\n"); 1069 return ret; 1070 } 1071 1072 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1073 return 0; 1074 } 1075 1076 static const struct net_device_ops smsc95xx_netdev_ops = { 1077 .ndo_open = usbnet_open, 1078 .ndo_stop = usbnet_stop, 1079 .ndo_start_xmit = usbnet_start_xmit, 1080 .ndo_tx_timeout = usbnet_tx_timeout, 1081 .ndo_change_mtu = usbnet_change_mtu, 1082 .ndo_get_stats64 = dev_get_tstats64, 1083 .ndo_set_mac_address = eth_mac_addr, 1084 .ndo_validate_addr = eth_validate_addr, 1085 .ndo_eth_ioctl = smsc95xx_ioctl, 1086 .ndo_set_rx_mode = smsc95xx_set_multicast, 1087 .ndo_set_features = smsc95xx_set_features, 1088 }; 1089 1090 static void smsc95xx_handle_link_change(struct net_device *net) 1091 { 1092 struct usbnet *dev = netdev_priv(net); 1093 1094 phy_print_status(net->phydev); 1095 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1096 } 1097 1098 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1099 { 1100 struct smsc95xx_priv *pdata; 1101 bool is_internal_phy; 1102 u32 val; 1103 int ret; 1104 1105 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1106 1107 ret = usbnet_get_endpoints(dev, intf); 1108 if (ret < 0) { 1109 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1110 return ret; 1111 } 1112 1113 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1114 if (!pdata) 1115 return -ENOMEM; 1116 1117 dev->driver_priv = pdata; 1118 1119 spin_lock_init(&pdata->mac_cr_lock); 1120 1121 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1122 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1123 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1124 * it is transmitted as all ones. The zero transmitted checksum means 1125 * transmitter generated no checksum. Hence, enable csum offload only 1126 * for ipv4 packets. 1127 */ 1128 if (DEFAULT_TX_CSUM_ENABLE) 1129 dev->net->features |= NETIF_F_IP_CSUM; 1130 if (DEFAULT_RX_CSUM_ENABLE) 1131 dev->net->features |= NETIF_F_RXCSUM; 1132 1133 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1134 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1135 1136 smsc95xx_init_mac_address(dev); 1137 1138 /* Init all registers */ 1139 ret = smsc95xx_reset(dev); 1140 if (ret) 1141 goto free_pdata; 1142 1143 pdata->mdiobus = mdiobus_alloc(); 1144 if (!pdata->mdiobus) { 1145 ret = -ENOMEM; 1146 goto free_pdata; 1147 } 1148 1149 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1150 if (ret < 0) 1151 goto free_mdio; 1152 1153 is_internal_phy = !(val & HW_CFG_PSEL_); 1154 if (is_internal_phy) 1155 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1156 1157 pdata->mdiobus->priv = dev; 1158 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1159 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1160 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1161 pdata->mdiobus->parent = &dev->udev->dev; 1162 1163 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1164 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1165 1166 ret = mdiobus_register(pdata->mdiobus); 1167 if (ret) { 1168 netdev_err(dev->net, "Could not register MDIO bus\n"); 1169 goto free_mdio; 1170 } 1171 1172 pdata->phydev = phy_find_first(pdata->mdiobus); 1173 if (!pdata->phydev) { 1174 netdev_err(dev->net, "no PHY found\n"); 1175 ret = -ENODEV; 1176 goto unregister_mdio; 1177 } 1178 1179 pdata->phydev->is_internal = is_internal_phy; 1180 1181 /* detect device revision as different features may be available */ 1182 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1183 if (ret < 0) 1184 goto unregister_mdio; 1185 1186 val >>= 16; 1187 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1188 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1189 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1190 FEATURE_PHY_NLP_CROSSOVER | 1191 FEATURE_REMOTE_WAKEUP); 1192 else if (val == ID_REV_CHIP_ID_9512_) 1193 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1194 1195 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1196 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1197 dev->net->flags |= IFF_MULTICAST; 1198 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1199 dev->net->min_mtu = ETH_MIN_MTU; 1200 dev->net->max_mtu = ETH_DATA_LEN; 1201 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1202 1203 ret = phy_connect_direct(dev->net, pdata->phydev, 1204 &smsc95xx_handle_link_change, 1205 PHY_INTERFACE_MODE_MII); 1206 if (ret) { 1207 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1208 goto unregister_mdio; 1209 } 1210 1211 phy_attached_info(dev->net->phydev); 1212 1213 return 0; 1214 1215 unregister_mdio: 1216 mdiobus_unregister(pdata->mdiobus); 1217 1218 free_mdio: 1219 mdiobus_free(pdata->mdiobus); 1220 1221 free_pdata: 1222 kfree(pdata); 1223 return ret; 1224 } 1225 1226 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1227 { 1228 struct smsc95xx_priv *pdata = dev->driver_priv; 1229 1230 phy_disconnect(dev->net->phydev); 1231 mdiobus_unregister(pdata->mdiobus); 1232 mdiobus_free(pdata->mdiobus); 1233 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1234 kfree(pdata); 1235 } 1236 1237 static int smsc95xx_start_phy(struct usbnet *dev) 1238 { 1239 phy_start(dev->net->phydev); 1240 1241 return 0; 1242 } 1243 1244 static int smsc95xx_stop(struct usbnet *dev) 1245 { 1246 if (dev->net->phydev) 1247 phy_stop(dev->net->phydev); 1248 1249 return 0; 1250 } 1251 1252 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1253 { 1254 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1255 return crc << ((filter % 2) * 16); 1256 } 1257 1258 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1259 { 1260 int ret; 1261 1262 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1263 1264 /* read to clear */ 1265 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_SRC); 1266 if (ret < 0) 1267 return ret; 1268 1269 /* enable interrupt source */ 1270 ret = smsc95xx_mdio_read_nopm(dev, PHY_INT_MASK); 1271 if (ret < 0) 1272 return ret; 1273 1274 ret |= mask; 1275 1276 smsc95xx_mdio_write_nopm(dev, PHY_INT_MASK, ret); 1277 1278 return 0; 1279 } 1280 1281 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1282 { 1283 int ret; 1284 1285 /* first, a dummy read, needed to latch some MII phys */ 1286 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1287 if (ret < 0) 1288 return ret; 1289 1290 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1291 if (ret < 0) 1292 return ret; 1293 1294 return !!(ret & BMSR_LSTATUS); 1295 } 1296 1297 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1298 { 1299 struct smsc95xx_priv *pdata = dev->driver_priv; 1300 u32 val; 1301 int ret; 1302 1303 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1304 if (ret < 0) 1305 return ret; 1306 1307 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1308 val |= PM_CTL_SUS_MODE_0; 1309 1310 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1311 if (ret < 0) 1312 return ret; 1313 1314 /* clear wol status */ 1315 val &= ~PM_CTL_WUPS_; 1316 val |= PM_CTL_WUPS_WOL_; 1317 1318 /* enable energy detection */ 1319 if (pdata->wolopts & WAKE_PHY) 1320 val |= PM_CTL_WUPS_ED_; 1321 1322 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1323 if (ret < 0) 1324 return ret; 1325 1326 /* read back PM_CTRL */ 1327 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1328 if (ret < 0) 1329 return ret; 1330 1331 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1332 1333 return 0; 1334 } 1335 1336 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1337 { 1338 struct smsc95xx_priv *pdata = dev->driver_priv; 1339 u32 val; 1340 int ret; 1341 1342 /* reconfigure link pulse detection timing for 1343 * compatibility with non-standard link partners 1344 */ 1345 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1346 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG, 1347 PHY_EDPD_CONFIG_DEFAULT); 1348 1349 /* enable energy detect power-down mode */ 1350 ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS); 1351 if (ret < 0) 1352 return ret; 1353 1354 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1355 1356 smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret); 1357 1358 /* enter SUSPEND1 mode */ 1359 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1360 if (ret < 0) 1361 return ret; 1362 1363 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1364 val |= PM_CTL_SUS_MODE_1; 1365 1366 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1367 if (ret < 0) 1368 return ret; 1369 1370 /* clear wol status, enable energy detection */ 1371 val &= ~PM_CTL_WUPS_; 1372 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1373 1374 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1375 if (ret < 0) 1376 return ret; 1377 1378 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1379 1380 return 0; 1381 } 1382 1383 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1384 { 1385 struct smsc95xx_priv *pdata = dev->driver_priv; 1386 u32 val; 1387 int ret; 1388 1389 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1390 if (ret < 0) 1391 return ret; 1392 1393 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1394 val |= PM_CTL_SUS_MODE_2; 1395 1396 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1397 if (ret < 0) 1398 return ret; 1399 1400 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1401 1402 return 0; 1403 } 1404 1405 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1406 { 1407 struct smsc95xx_priv *pdata = dev->driver_priv; 1408 u32 val; 1409 int ret; 1410 1411 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1412 if (ret < 0) 1413 return ret; 1414 1415 if (val & RX_FIFO_INF_USED_) { 1416 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1417 return -EBUSY; 1418 } 1419 1420 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1421 if (ret < 0) 1422 return ret; 1423 1424 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1425 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1426 1427 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1428 if (ret < 0) 1429 return ret; 1430 1431 /* clear wol status */ 1432 val &= ~PM_CTL_WUPS_; 1433 val |= PM_CTL_WUPS_WOL_; 1434 1435 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1436 if (ret < 0) 1437 return ret; 1438 1439 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1440 1441 return 0; 1442 } 1443 1444 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1445 { 1446 struct smsc95xx_priv *pdata = dev->driver_priv; 1447 int ret; 1448 1449 if (!netif_running(dev->net)) { 1450 /* interface is ifconfig down so fully power down hw */ 1451 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1452 return smsc95xx_enter_suspend2(dev); 1453 } 1454 1455 if (!link_up) { 1456 /* link is down so enter EDPD mode, but only if device can 1457 * reliably resume from it. This check should be redundant 1458 * as current FEATURE_REMOTE_WAKEUP parts also support 1459 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1460 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1461 netdev_warn(dev->net, "EDPD not supported\n"); 1462 return -EBUSY; 1463 } 1464 1465 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1466 1467 /* enable PHY wakeup events for if cable is attached */ 1468 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1469 PHY_INT_MASK_ANEG_COMP_); 1470 if (ret < 0) { 1471 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1472 return ret; 1473 } 1474 1475 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1476 return smsc95xx_enter_suspend1(dev); 1477 } 1478 1479 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1480 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1481 PHY_INT_MASK_LINK_DOWN_); 1482 if (ret < 0) { 1483 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1484 return ret; 1485 } 1486 1487 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1488 return smsc95xx_enter_suspend3(dev); 1489 } 1490 1491 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1492 { 1493 struct usbnet *dev = usb_get_intfdata(intf); 1494 struct smsc95xx_priv *pdata = dev->driver_priv; 1495 u32 val, link_up; 1496 int ret; 1497 1498 ret = usbnet_suspend(intf, message); 1499 if (ret < 0) { 1500 netdev_warn(dev->net, "usbnet_suspend error\n"); 1501 return ret; 1502 } 1503 1504 if (pdata->suspend_flags) { 1505 netdev_warn(dev->net, "error during last resume\n"); 1506 pdata->suspend_flags = 0; 1507 } 1508 1509 /* determine if link is up using only _nopm functions */ 1510 link_up = smsc95xx_link_ok_nopm(dev); 1511 1512 if (message.event == PM_EVENT_AUTO_SUSPEND && 1513 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1514 ret = smsc95xx_autosuspend(dev, link_up); 1515 goto done; 1516 } 1517 1518 /* if we get this far we're not autosuspending */ 1519 /* if no wol options set, or if link is down and we're not waking on 1520 * PHY activity, enter lowest power SUSPEND2 mode 1521 */ 1522 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1523 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1524 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1525 1526 /* disable energy detect (link up) & wake up events */ 1527 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1528 if (ret < 0) 1529 goto done; 1530 1531 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1532 1533 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1534 if (ret < 0) 1535 goto done; 1536 1537 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1538 if (ret < 0) 1539 goto done; 1540 1541 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1542 1543 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1544 if (ret < 0) 1545 goto done; 1546 1547 ret = smsc95xx_enter_suspend2(dev); 1548 goto done; 1549 } 1550 1551 if (pdata->wolopts & WAKE_PHY) { 1552 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1553 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1554 if (ret < 0) { 1555 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1556 goto done; 1557 } 1558 1559 /* if link is down then configure EDPD and enter SUSPEND1, 1560 * otherwise enter SUSPEND0 below 1561 */ 1562 if (!link_up) { 1563 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1564 ret = smsc95xx_enter_suspend1(dev); 1565 goto done; 1566 } 1567 } 1568 1569 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1570 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1571 u32 command[2]; 1572 u32 offset[2]; 1573 u32 crc[4]; 1574 int wuff_filter_count = 1575 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1576 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1577 int i, filter = 0; 1578 1579 if (!filter_mask) { 1580 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1581 ret = -ENOMEM; 1582 goto done; 1583 } 1584 1585 memset(command, 0, sizeof(command)); 1586 memset(offset, 0, sizeof(offset)); 1587 memset(crc, 0, sizeof(crc)); 1588 1589 if (pdata->wolopts & WAKE_BCAST) { 1590 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1591 netdev_info(dev->net, "enabling broadcast detection\n"); 1592 filter_mask[filter * 4] = 0x003F; 1593 filter_mask[filter * 4 + 1] = 0x00; 1594 filter_mask[filter * 4 + 2] = 0x00; 1595 filter_mask[filter * 4 + 3] = 0x00; 1596 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1597 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1598 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1599 filter++; 1600 } 1601 1602 if (pdata->wolopts & WAKE_MCAST) { 1603 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1604 netdev_info(dev->net, "enabling multicast detection\n"); 1605 filter_mask[filter * 4] = 0x0007; 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] |= 0x09UL << ((filter % 4) * 8); 1610 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1611 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1612 filter++; 1613 } 1614 1615 if (pdata->wolopts & WAKE_ARP) { 1616 const u8 arp[] = {0x08, 0x06}; 1617 netdev_info(dev->net, "enabling ARP detection\n"); 1618 filter_mask[filter * 4] = 0x0003; 1619 filter_mask[filter * 4 + 1] = 0x00; 1620 filter_mask[filter * 4 + 2] = 0x00; 1621 filter_mask[filter * 4 + 3] = 0x00; 1622 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1623 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1624 crc[filter/2] |= smsc_crc(arp, 2, filter); 1625 filter++; 1626 } 1627 1628 if (pdata->wolopts & WAKE_UCAST) { 1629 netdev_info(dev->net, "enabling unicast detection\n"); 1630 filter_mask[filter * 4] = 0x003F; 1631 filter_mask[filter * 4 + 1] = 0x00; 1632 filter_mask[filter * 4 + 2] = 0x00; 1633 filter_mask[filter * 4 + 3] = 0x00; 1634 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1635 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1636 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1637 filter++; 1638 } 1639 1640 for (i = 0; i < (wuff_filter_count * 4); i++) { 1641 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1642 if (ret < 0) { 1643 kfree(filter_mask); 1644 goto done; 1645 } 1646 } 1647 kfree(filter_mask); 1648 1649 for (i = 0; i < (wuff_filter_count / 4); i++) { 1650 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1651 if (ret < 0) 1652 goto done; 1653 } 1654 1655 for (i = 0; i < (wuff_filter_count / 4); i++) { 1656 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1657 if (ret < 0) 1658 goto done; 1659 } 1660 1661 for (i = 0; i < (wuff_filter_count / 2); i++) { 1662 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1663 if (ret < 0) 1664 goto done; 1665 } 1666 1667 /* clear any pending pattern match packet status */ 1668 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1669 if (ret < 0) 1670 goto done; 1671 1672 val |= WUCSR_WUFR_; 1673 1674 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1675 if (ret < 0) 1676 goto done; 1677 } 1678 1679 if (pdata->wolopts & WAKE_MAGIC) { 1680 /* clear any pending magic packet status */ 1681 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1682 if (ret < 0) 1683 goto done; 1684 1685 val |= WUCSR_MPR_; 1686 1687 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1688 if (ret < 0) 1689 goto done; 1690 } 1691 1692 /* enable/disable wakeup sources */ 1693 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1694 if (ret < 0) 1695 goto done; 1696 1697 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1698 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1699 val |= WUCSR_WAKE_EN_; 1700 } else { 1701 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1702 val &= ~WUCSR_WAKE_EN_; 1703 } 1704 1705 if (pdata->wolopts & WAKE_MAGIC) { 1706 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1707 val |= WUCSR_MPEN_; 1708 } else { 1709 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1710 val &= ~WUCSR_MPEN_; 1711 } 1712 1713 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1714 if (ret < 0) 1715 goto done; 1716 1717 /* enable wol wakeup source */ 1718 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1719 if (ret < 0) 1720 goto done; 1721 1722 val |= PM_CTL_WOL_EN_; 1723 1724 /* phy energy detect wakeup source */ 1725 if (pdata->wolopts & WAKE_PHY) 1726 val |= PM_CTL_ED_EN_; 1727 1728 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1729 if (ret < 0) 1730 goto done; 1731 1732 /* enable receiver to enable frame reception */ 1733 smsc95xx_start_rx_path(dev, 1); 1734 1735 /* some wol options are enabled, so enter SUSPEND0 */ 1736 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1737 ret = smsc95xx_enter_suspend0(dev); 1738 1739 done: 1740 /* 1741 * TODO: resume() might need to handle the suspend failure 1742 * in system sleep 1743 */ 1744 if (ret && PMSG_IS_AUTO(message)) 1745 usbnet_resume(intf); 1746 1747 return ret; 1748 } 1749 1750 static int smsc95xx_resume(struct usb_interface *intf) 1751 { 1752 struct usbnet *dev = usb_get_intfdata(intf); 1753 struct smsc95xx_priv *pdata; 1754 u8 suspend_flags; 1755 int ret; 1756 u32 val; 1757 1758 BUG_ON(!dev); 1759 pdata = dev->driver_priv; 1760 suspend_flags = pdata->suspend_flags; 1761 1762 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1763 1764 /* do this first to ensure it's cleared even in error case */ 1765 pdata->suspend_flags = 0; 1766 1767 if (suspend_flags & SUSPEND_ALLMODES) { 1768 /* clear wake-up sources */ 1769 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1770 if (ret < 0) 1771 return ret; 1772 1773 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1774 1775 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1776 if (ret < 0) 1777 return ret; 1778 1779 /* clear wake-up status */ 1780 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1781 if (ret < 0) 1782 return ret; 1783 1784 val &= ~PM_CTL_WOL_EN_; 1785 val |= PM_CTL_WUPS_; 1786 1787 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1788 if (ret < 0) 1789 return ret; 1790 } 1791 1792 ret = usbnet_resume(intf); 1793 if (ret < 0) 1794 netdev_warn(dev->net, "usbnet_resume error\n"); 1795 1796 phy_init_hw(pdata->phydev); 1797 return ret; 1798 } 1799 1800 static int smsc95xx_reset_resume(struct usb_interface *intf) 1801 { 1802 struct usbnet *dev = usb_get_intfdata(intf); 1803 int ret; 1804 1805 ret = smsc95xx_reset(dev); 1806 if (ret < 0) 1807 return ret; 1808 1809 return smsc95xx_resume(intf); 1810 } 1811 1812 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1813 { 1814 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1815 skb->ip_summed = CHECKSUM_COMPLETE; 1816 skb_trim(skb, skb->len - 2); 1817 } 1818 1819 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1820 { 1821 /* This check is no longer done by usbnet */ 1822 if (skb->len < dev->net->hard_header_len) 1823 return 0; 1824 1825 while (skb->len > 0) { 1826 u32 header, align_count; 1827 struct sk_buff *ax_skb; 1828 unsigned char *packet; 1829 u16 size; 1830 1831 header = get_unaligned_le32(skb->data); 1832 skb_pull(skb, 4 + NET_IP_ALIGN); 1833 packet = skb->data; 1834 1835 /* get the packet length */ 1836 size = (u16)((header & RX_STS_FL_) >> 16); 1837 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1838 1839 if (unlikely(header & RX_STS_ES_)) { 1840 netif_dbg(dev, rx_err, dev->net, 1841 "Error header=0x%08x\n", header); 1842 dev->net->stats.rx_errors++; 1843 dev->net->stats.rx_dropped++; 1844 1845 if (header & RX_STS_CRC_) { 1846 dev->net->stats.rx_crc_errors++; 1847 } else { 1848 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1849 dev->net->stats.rx_frame_errors++; 1850 1851 if ((header & RX_STS_LE_) && 1852 (!(header & RX_STS_FT_))) 1853 dev->net->stats.rx_length_errors++; 1854 } 1855 } else { 1856 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1857 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1858 netif_dbg(dev, rx_err, dev->net, 1859 "size err header=0x%08x\n", header); 1860 return 0; 1861 } 1862 1863 /* last frame in this batch */ 1864 if (skb->len == size) { 1865 if (dev->net->features & NETIF_F_RXCSUM) 1866 smsc95xx_rx_csum_offload(skb); 1867 skb_trim(skb, skb->len - 4); /* remove fcs */ 1868 skb->truesize = size + sizeof(struct sk_buff); 1869 1870 return 1; 1871 } 1872 1873 ax_skb = skb_clone(skb, GFP_ATOMIC); 1874 if (unlikely(!ax_skb)) { 1875 netdev_warn(dev->net, "Error allocating skb\n"); 1876 return 0; 1877 } 1878 1879 ax_skb->len = size; 1880 ax_skb->data = packet; 1881 skb_set_tail_pointer(ax_skb, size); 1882 1883 if (dev->net->features & NETIF_F_RXCSUM) 1884 smsc95xx_rx_csum_offload(ax_skb); 1885 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1886 ax_skb->truesize = size + sizeof(struct sk_buff); 1887 1888 usbnet_skb_return(dev, ax_skb); 1889 } 1890 1891 skb_pull(skb, size); 1892 1893 /* padding bytes before the next frame starts */ 1894 if (skb->len) 1895 skb_pull(skb, align_count); 1896 } 1897 1898 return 1; 1899 } 1900 1901 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1902 { 1903 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1904 u16 high_16 = low_16 + skb->csum_offset; 1905 return (high_16 << 16) | low_16; 1906 } 1907 1908 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1909 * transmission. This is fairly unlikely, only seems to trigger with some 1910 * short TCP ACK packets sent. 1911 * 1912 * Note, this calculation should probably check for the alignment of the 1913 * data as well, but a straight check for csum being in the last four bytes 1914 * of the packet should be ok for now. 1915 */ 1916 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1917 { 1918 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1919 1920 if (skb->len <= 45) 1921 return false; 1922 return skb->csum_offset < (len - (4 + 1)); 1923 } 1924 1925 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1926 struct sk_buff *skb, gfp_t flags) 1927 { 1928 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1929 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1930 u32 tx_cmd_a, tx_cmd_b; 1931 void *ptr; 1932 1933 /* We do not advertise SG, so skbs should be already linearized */ 1934 BUG_ON(skb_shinfo(skb)->nr_frags); 1935 1936 /* Make writable and expand header space by overhead if required */ 1937 if (skb_cow_head(skb, overhead)) { 1938 /* Must deallocate here as returning NULL to indicate error 1939 * means the skb won't be deallocated in the caller. 1940 */ 1941 dev_kfree_skb_any(skb); 1942 return NULL; 1943 } 1944 1945 tx_cmd_b = (u32)skb->len; 1946 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1947 1948 if (csum) { 1949 if (!smsc95xx_can_tx_checksum(skb)) { 1950 /* workaround - hardware tx checksum does not work 1951 * properly with extremely small packets */ 1952 long csstart = skb_checksum_start_offset(skb); 1953 __wsum calc = csum_partial(skb->data + csstart, 1954 skb->len - csstart, 0); 1955 *((__sum16 *)(skb->data + csstart 1956 + skb->csum_offset)) = csum_fold(calc); 1957 1958 csum = false; 1959 } else { 1960 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1961 ptr = skb_push(skb, 4); 1962 put_unaligned_le32(csum_preamble, ptr); 1963 1964 tx_cmd_a += 4; 1965 tx_cmd_b += 4; 1966 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1967 } 1968 } 1969 1970 ptr = skb_push(skb, 8); 1971 put_unaligned_le32(tx_cmd_a, ptr); 1972 put_unaligned_le32(tx_cmd_b, ptr+4); 1973 1974 return skb; 1975 } 1976 1977 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1978 { 1979 struct smsc95xx_priv *pdata = dev->driver_priv; 1980 1981 dev->intf->needs_remote_wakeup = on; 1982 1983 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1984 return 0; 1985 1986 /* this chip revision isn't capable of remote wakeup */ 1987 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1988 1989 if (on) 1990 usb_autopm_get_interface_no_resume(dev->intf); 1991 else 1992 usb_autopm_put_interface(dev->intf); 1993 1994 return 0; 1995 } 1996 1997 static const struct driver_info smsc95xx_info = { 1998 .description = "smsc95xx USB 2.0 Ethernet", 1999 .bind = smsc95xx_bind, 2000 .unbind = smsc95xx_unbind, 2001 .link_reset = smsc95xx_link_reset, 2002 .reset = smsc95xx_reset, 2003 .check_connect = smsc95xx_start_phy, 2004 .stop = smsc95xx_stop, 2005 .rx_fixup = smsc95xx_rx_fixup, 2006 .tx_fixup = smsc95xx_tx_fixup, 2007 .status = smsc95xx_status, 2008 .manage_power = smsc95xx_manage_power, 2009 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2010 }; 2011 2012 static const struct usb_device_id products[] = { 2013 { 2014 /* SMSC9500 USB Ethernet Device */ 2015 USB_DEVICE(0x0424, 0x9500), 2016 .driver_info = (unsigned long) &smsc95xx_info, 2017 }, 2018 { 2019 /* SMSC9505 USB Ethernet Device */ 2020 USB_DEVICE(0x0424, 0x9505), 2021 .driver_info = (unsigned long) &smsc95xx_info, 2022 }, 2023 { 2024 /* SMSC9500A USB Ethernet Device */ 2025 USB_DEVICE(0x0424, 0x9E00), 2026 .driver_info = (unsigned long) &smsc95xx_info, 2027 }, 2028 { 2029 /* SMSC9505A USB Ethernet Device */ 2030 USB_DEVICE(0x0424, 0x9E01), 2031 .driver_info = (unsigned long) &smsc95xx_info, 2032 }, 2033 { 2034 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2035 USB_DEVICE(0x0424, 0xec00), 2036 .driver_info = (unsigned long) &smsc95xx_info, 2037 }, 2038 { 2039 /* SMSC9500 USB Ethernet Device (SAL10) */ 2040 USB_DEVICE(0x0424, 0x9900), 2041 .driver_info = (unsigned long) &smsc95xx_info, 2042 }, 2043 { 2044 /* SMSC9505 USB Ethernet Device (SAL10) */ 2045 USB_DEVICE(0x0424, 0x9901), 2046 .driver_info = (unsigned long) &smsc95xx_info, 2047 }, 2048 { 2049 /* SMSC9500A USB Ethernet Device (SAL10) */ 2050 USB_DEVICE(0x0424, 0x9902), 2051 .driver_info = (unsigned long) &smsc95xx_info, 2052 }, 2053 { 2054 /* SMSC9505A USB Ethernet Device (SAL10) */ 2055 USB_DEVICE(0x0424, 0x9903), 2056 .driver_info = (unsigned long) &smsc95xx_info, 2057 }, 2058 { 2059 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2060 USB_DEVICE(0x0424, 0x9904), 2061 .driver_info = (unsigned long) &smsc95xx_info, 2062 }, 2063 { 2064 /* SMSC9500A USB Ethernet Device (HAL) */ 2065 USB_DEVICE(0x0424, 0x9905), 2066 .driver_info = (unsigned long) &smsc95xx_info, 2067 }, 2068 { 2069 /* SMSC9505A USB Ethernet Device (HAL) */ 2070 USB_DEVICE(0x0424, 0x9906), 2071 .driver_info = (unsigned long) &smsc95xx_info, 2072 }, 2073 { 2074 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2075 USB_DEVICE(0x0424, 0x9907), 2076 .driver_info = (unsigned long) &smsc95xx_info, 2077 }, 2078 { 2079 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2080 USB_DEVICE(0x0424, 0x9908), 2081 .driver_info = (unsigned long) &smsc95xx_info, 2082 }, 2083 { 2084 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2085 USB_DEVICE(0x0424, 0x9909), 2086 .driver_info = (unsigned long) &smsc95xx_info, 2087 }, 2088 { 2089 /* SMSC LAN9530 USB Ethernet Device */ 2090 USB_DEVICE(0x0424, 0x9530), 2091 .driver_info = (unsigned long) &smsc95xx_info, 2092 }, 2093 { 2094 /* SMSC LAN9730 USB Ethernet Device */ 2095 USB_DEVICE(0x0424, 0x9730), 2096 .driver_info = (unsigned long) &smsc95xx_info, 2097 }, 2098 { 2099 /* SMSC LAN89530 USB Ethernet Device */ 2100 USB_DEVICE(0x0424, 0x9E08), 2101 .driver_info = (unsigned long) &smsc95xx_info, 2102 }, 2103 { }, /* END */ 2104 }; 2105 MODULE_DEVICE_TABLE(usb, products); 2106 2107 static struct usb_driver smsc95xx_driver = { 2108 .name = "smsc95xx", 2109 .id_table = products, 2110 .probe = usbnet_probe, 2111 .suspend = smsc95xx_suspend, 2112 .resume = smsc95xx_resume, 2113 .reset_resume = smsc95xx_reset_resume, 2114 .disconnect = usbnet_disconnect, 2115 .disable_hub_initiated_lpm = 1, 2116 .supports_autosuspend = 1, 2117 }; 2118 2119 module_usb_driver(smsc95xx_driver); 2120 2121 MODULE_AUTHOR("Nancy Lin"); 2122 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2123 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2124 MODULE_LICENSE("GPL"); 2125