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/irq.h> 22 #include <linux/irqdomain.h> 23 #include <linux/mdio.h> 24 #include <linux/phy.h> 25 #include <net/selftests.h> 26 27 #include "smsc95xx.h" 28 29 #define SMSC_CHIPNAME "smsc95xx" 30 #define SMSC_DRIVER_VERSION "2.0.0" 31 #define HS_USB_PKT_SIZE (512) 32 #define FS_USB_PKT_SIZE (64) 33 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) 34 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) 35 #define DEFAULT_BULK_IN_DELAY (0x00002000) 36 #define MAX_SINGLE_PACKET_SIZE (2048) 37 #define LAN95XX_EEPROM_MAGIC (0x9500) 38 #define EEPROM_MAC_OFFSET (0x01) 39 #define DEFAULT_TX_CSUM_ENABLE (true) 40 #define DEFAULT_RX_CSUM_ENABLE (true) 41 #define SMSC95XX_INTERNAL_PHY_ID (1) 42 #define SMSC95XX_TX_OVERHEAD (8) 43 #define SMSC95XX_TX_OVERHEAD_CSUM (12) 44 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ 45 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) 46 47 #define FEATURE_8_WAKEUP_FILTERS (0x01) 48 #define FEATURE_PHY_NLP_CROSSOVER (0x02) 49 #define FEATURE_REMOTE_WAKEUP (0x04) 50 51 #define SUSPEND_SUSPEND0 (0x01) 52 #define SUSPEND_SUSPEND1 (0x02) 53 #define SUSPEND_SUSPEND2 (0x04) 54 #define SUSPEND_SUSPEND3 (0x08) 55 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ 56 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) 57 58 #define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */ 59 #define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1) 60 61 struct smsc95xx_priv { 62 u32 mac_cr; 63 u32 hash_hi; 64 u32 hash_lo; 65 u32 wolopts; 66 spinlock_t mac_cr_lock; 67 u8 features; 68 u8 suspend_flags; 69 struct irq_chip irqchip; 70 struct irq_domain *irqdomain; 71 struct fwnode_handle *irqfwnode; 72 struct mii_bus *mdiobus; 73 struct phy_device *phydev; 74 struct task_struct *pm_task; 75 }; 76 77 static bool turbo_mode = true; 78 module_param(turbo_mode, bool, 0644); 79 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 80 81 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 82 u32 *data) 83 { 84 struct smsc95xx_priv *pdata = dev->driver_priv; 85 u32 buf; 86 int ret; 87 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 88 89 BUG_ON(!dev); 90 91 if (current != pdata->pm_task) 92 fn = usbnet_read_cmd; 93 else 94 fn = usbnet_read_cmd_nopm; 95 96 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 97 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 98 0, index, &buf, 4); 99 if (ret < 0) { 100 if (ret != -ENODEV) 101 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 102 index, ret); 103 return ret; 104 } 105 106 le32_to_cpus(&buf); 107 *data = buf; 108 109 return ret; 110 } 111 112 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 113 u32 data) 114 { 115 struct smsc95xx_priv *pdata = dev->driver_priv; 116 u32 buf; 117 int ret; 118 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 119 120 BUG_ON(!dev); 121 122 if (current != pdata->pm_task) 123 fn = usbnet_write_cmd; 124 else 125 fn = usbnet_write_cmd_nopm; 126 127 buf = data; 128 cpu_to_le32s(&buf); 129 130 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 131 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 132 0, index, &buf, 4); 133 if (ret < 0 && ret != -ENODEV) 134 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 135 index, ret); 136 137 return ret; 138 } 139 140 /* Loop until the read is completed with timeout 141 * called with phy_mutex held */ 142 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) 143 { 144 unsigned long start_time = jiffies; 145 u32 val; 146 int ret; 147 148 do { 149 ret = smsc95xx_read_reg(dev, MII_ADDR, &val); 150 if (ret < 0) { 151 /* Ignore -ENODEV error during disconnect() */ 152 if (ret == -ENODEV) 153 return 0; 154 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 155 return ret; 156 } 157 158 if (!(val & MII_BUSY_)) 159 return 0; 160 } while (!time_after(jiffies, start_time + HZ)); 161 162 return -EIO; 163 } 164 165 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 166 { 167 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 168 } 169 170 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx) 171 { 172 u32 val, addr; 173 int ret; 174 175 mutex_lock(&dev->phy_mutex); 176 177 /* confirm MII not busy */ 178 ret = smsc95xx_phy_wait_not_busy(dev); 179 if (ret < 0) { 180 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 181 goto done; 182 } 183 184 /* set the address, index & direction (read from PHY) */ 185 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 186 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 187 if (ret < 0) { 188 if (ret != -ENODEV) 189 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 190 goto done; 191 } 192 193 ret = smsc95xx_phy_wait_not_busy(dev); 194 if (ret < 0) { 195 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 196 goto done; 197 } 198 199 ret = smsc95xx_read_reg(dev, MII_DATA, &val); 200 if (ret < 0) { 201 if (ret != -ENODEV) 202 netdev_warn(dev->net, "Error reading MII_DATA\n"); 203 goto done; 204 } 205 206 ret = (u16)(val & 0xFFFF); 207 208 done: 209 mutex_unlock(&dev->phy_mutex); 210 211 /* Ignore -ENODEV error during disconnect() */ 212 if (ret == -ENODEV) 213 return 0; 214 return ret; 215 } 216 217 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx, 218 int regval) 219 { 220 u32 val, addr; 221 int ret; 222 223 mutex_lock(&dev->phy_mutex); 224 225 /* confirm MII not busy */ 226 ret = smsc95xx_phy_wait_not_busy(dev); 227 if (ret < 0) { 228 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 229 goto done; 230 } 231 232 val = regval; 233 ret = smsc95xx_write_reg(dev, MII_DATA, val); 234 if (ret < 0) { 235 if (ret != -ENODEV) 236 netdev_warn(dev->net, "Error writing MII_DATA\n"); 237 goto done; 238 } 239 240 /* set the address, index & direction (write to PHY) */ 241 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 242 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 243 if (ret < 0) { 244 if (ret != -ENODEV) 245 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 246 goto done; 247 } 248 249 ret = smsc95xx_phy_wait_not_busy(dev); 250 if (ret < 0) { 251 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 252 goto done; 253 } 254 255 done: 256 mutex_unlock(&dev->phy_mutex); 257 } 258 259 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 260 { 261 struct usbnet *dev = bus->priv; 262 263 return smsc95xx_mdio_read(dev, phy_id, idx); 264 } 265 266 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 267 u16 regval) 268 { 269 struct usbnet *dev = bus->priv; 270 271 smsc95xx_mdio_write(dev, phy_id, idx, regval); 272 return 0; 273 } 274 275 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 276 { 277 unsigned long start_time = jiffies; 278 u32 val; 279 int ret; 280 281 do { 282 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 283 if (ret < 0) { 284 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 285 return ret; 286 } 287 288 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 289 break; 290 udelay(40); 291 } while (!time_after(jiffies, start_time + HZ)); 292 293 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 294 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 295 return -EIO; 296 } 297 298 return 0; 299 } 300 301 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 302 { 303 unsigned long start_time = jiffies; 304 u32 val; 305 int ret; 306 307 do { 308 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 309 if (ret < 0) { 310 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 311 return ret; 312 } 313 314 if (!(val & E2P_CMD_BUSY_)) 315 return 0; 316 317 udelay(40); 318 } while (!time_after(jiffies, start_time + HZ)); 319 320 netdev_warn(dev->net, "EEPROM is busy\n"); 321 return -EIO; 322 } 323 324 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 325 u8 *data) 326 { 327 u32 val; 328 int i, ret; 329 330 BUG_ON(!dev); 331 BUG_ON(!data); 332 333 ret = smsc95xx_eeprom_confirm_not_busy(dev); 334 if (ret) 335 return ret; 336 337 for (i = 0; i < length; i++) { 338 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 339 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 340 if (ret < 0) { 341 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 342 return ret; 343 } 344 345 ret = smsc95xx_wait_eeprom(dev); 346 if (ret < 0) 347 return ret; 348 349 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 350 if (ret < 0) { 351 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 352 return ret; 353 } 354 355 data[i] = val & 0xFF; 356 offset++; 357 } 358 359 return 0; 360 } 361 362 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 363 u8 *data) 364 { 365 u32 val; 366 int i, ret; 367 368 BUG_ON(!dev); 369 BUG_ON(!data); 370 371 ret = smsc95xx_eeprom_confirm_not_busy(dev); 372 if (ret) 373 return ret; 374 375 /* Issue write/erase enable command */ 376 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 377 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 378 if (ret < 0) { 379 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 380 return ret; 381 } 382 383 ret = smsc95xx_wait_eeprom(dev); 384 if (ret < 0) 385 return ret; 386 387 for (i = 0; i < length; i++) { 388 389 /* Fill data register */ 390 val = data[i]; 391 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 392 if (ret < 0) { 393 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 394 return ret; 395 } 396 397 /* Send "write" command */ 398 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 399 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 400 if (ret < 0) { 401 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 402 return ret; 403 } 404 405 ret = smsc95xx_wait_eeprom(dev); 406 if (ret < 0) 407 return ret; 408 409 offset++; 410 } 411 412 return 0; 413 } 414 415 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 416 u32 data) 417 { 418 const u16 size = 4; 419 u32 buf; 420 int ret; 421 422 buf = data; 423 cpu_to_le32s(&buf); 424 425 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 426 USB_DIR_OUT | USB_TYPE_VENDOR | 427 USB_RECIP_DEVICE, 428 0, index, &buf, size); 429 if (ret < 0) 430 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 431 ret); 432 return ret; 433 } 434 435 /* returns hash bit number for given MAC address 436 * example: 437 * 01 00 5E 00 00 01 -> returns bit number 31 */ 438 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 439 { 440 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 441 } 442 443 static void smsc95xx_set_multicast(struct net_device *netdev) 444 { 445 struct usbnet *dev = netdev_priv(netdev); 446 struct smsc95xx_priv *pdata = dev->driver_priv; 447 unsigned long flags; 448 int ret; 449 450 pdata->hash_hi = 0; 451 pdata->hash_lo = 0; 452 453 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 454 455 if (dev->net->flags & IFF_PROMISC) { 456 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 457 pdata->mac_cr |= MAC_CR_PRMS_; 458 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 459 } else if (dev->net->flags & IFF_ALLMULTI) { 460 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 461 pdata->mac_cr |= MAC_CR_MCPAS_; 462 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 463 } else if (!netdev_mc_empty(dev->net)) { 464 struct netdev_hw_addr *ha; 465 466 pdata->mac_cr |= MAC_CR_HPFILT_; 467 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 468 469 netdev_for_each_mc_addr(ha, netdev) { 470 u32 bitnum = smsc95xx_hash(ha->addr); 471 u32 mask = 0x01 << (bitnum & 0x1F); 472 if (bitnum & 0x20) 473 pdata->hash_hi |= mask; 474 else 475 pdata->hash_lo |= mask; 476 } 477 478 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 479 pdata->hash_hi, pdata->hash_lo); 480 } else { 481 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 482 pdata->mac_cr &= 483 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 484 } 485 486 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 487 488 /* Initiate async writes, as we can't wait for completion here */ 489 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 490 if (ret < 0) 491 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 492 493 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 494 if (ret < 0) 495 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 496 497 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 498 if (ret < 0) 499 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 500 } 501 502 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 503 { 504 u32 flow = 0, afc_cfg; 505 struct smsc95xx_priv *pdata = dev->driver_priv; 506 bool tx_pause, rx_pause; 507 508 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 509 if (ret < 0) 510 return ret; 511 512 if (pdata->phydev->duplex == DUPLEX_FULL) { 513 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 514 515 if (rx_pause) 516 flow = 0xFFFF0002; 517 518 if (tx_pause) { 519 afc_cfg |= 0xF; 520 flow |= 0xFFFF0000; 521 } else { 522 afc_cfg &= ~0xF; 523 } 524 525 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 526 rx_pause ? "enabled" : "disabled", 527 tx_pause ? "enabled" : "disabled"); 528 } else { 529 netif_dbg(dev, link, dev->net, "half duplex\n"); 530 afc_cfg |= 0xF; 531 } 532 533 ret = smsc95xx_write_reg(dev, FLOW, flow); 534 if (ret < 0) 535 return ret; 536 537 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 538 } 539 540 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) 541 { 542 struct smsc95xx_priv *pdata = dev->driver_priv; 543 unsigned long flags; 544 int ret; 545 546 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 547 if (pdata->phydev->duplex != DUPLEX_FULL) { 548 pdata->mac_cr &= ~MAC_CR_FDPX_; 549 pdata->mac_cr |= MAC_CR_RCVOWN_; 550 } else { 551 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 552 pdata->mac_cr |= MAC_CR_FDPX_; 553 } 554 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 555 556 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 557 if (ret < 0) { 558 if (ret != -ENODEV) 559 netdev_warn(dev->net, 560 "Error updating MAC full duplex mode\n"); 561 return; 562 } 563 564 ret = smsc95xx_phy_update_flowcontrol(dev); 565 if (ret < 0) 566 netdev_warn(dev->net, "Error updating PHY flow control\n"); 567 } 568 569 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 570 { 571 struct smsc95xx_priv *pdata = dev->driver_priv; 572 unsigned long flags; 573 u32 intdata; 574 575 if (urb->actual_length != 4) { 576 netdev_warn(dev->net, "unexpected urb length %d\n", 577 urb->actual_length); 578 return; 579 } 580 581 intdata = get_unaligned_le32(urb->transfer_buffer); 582 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 583 584 local_irq_save(flags); 585 586 if (intdata & INT_ENP_PHY_INT_) 587 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ); 588 else 589 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 590 intdata); 591 592 local_irq_restore(flags); 593 } 594 595 /* Enable or disable Tx & Rx checksum offload engines */ 596 static int smsc95xx_set_features(struct net_device *netdev, 597 netdev_features_t features) 598 { 599 struct usbnet *dev = netdev_priv(netdev); 600 u32 read_buf; 601 int ret; 602 603 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 604 if (ret < 0) 605 return ret; 606 607 if (features & NETIF_F_IP_CSUM) 608 read_buf |= Tx_COE_EN_; 609 else 610 read_buf &= ~Tx_COE_EN_; 611 612 if (features & NETIF_F_RXCSUM) 613 read_buf |= Rx_COE_EN_; 614 else 615 read_buf &= ~Rx_COE_EN_; 616 617 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 618 if (ret < 0) 619 return ret; 620 621 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 622 return 0; 623 } 624 625 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 626 { 627 return MAX_EEPROM_SIZE; 628 } 629 630 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 631 struct ethtool_eeprom *ee, u8 *data) 632 { 633 struct usbnet *dev = netdev_priv(netdev); 634 635 ee->magic = LAN95XX_EEPROM_MAGIC; 636 637 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 638 } 639 640 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 641 struct ethtool_eeprom *ee, u8 *data) 642 { 643 struct usbnet *dev = netdev_priv(netdev); 644 645 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 646 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 647 ee->magic); 648 return -EINVAL; 649 } 650 651 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 652 } 653 654 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 655 { 656 /* all smsc95xx registers */ 657 return COE_CR - ID_REV + sizeof(u32); 658 } 659 660 static void 661 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 662 void *buf) 663 { 664 struct usbnet *dev = netdev_priv(netdev); 665 unsigned int i, j; 666 int retval; 667 u32 *data = buf; 668 669 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 670 if (retval < 0) { 671 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 672 return; 673 } 674 675 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 676 retval = smsc95xx_read_reg(dev, i, &data[j]); 677 if (retval < 0) { 678 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 679 return; 680 } 681 } 682 } 683 684 static void smsc95xx_ethtool_get_wol(struct net_device *net, 685 struct ethtool_wolinfo *wolinfo) 686 { 687 struct usbnet *dev = netdev_priv(net); 688 struct smsc95xx_priv *pdata = dev->driver_priv; 689 690 wolinfo->supported = SUPPORTED_WAKE; 691 wolinfo->wolopts = pdata->wolopts; 692 } 693 694 static int smsc95xx_ethtool_set_wol(struct net_device *net, 695 struct ethtool_wolinfo *wolinfo) 696 { 697 struct usbnet *dev = netdev_priv(net); 698 struct smsc95xx_priv *pdata = dev->driver_priv; 699 int ret; 700 701 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 702 return -EINVAL; 703 704 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 705 706 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 707 if (ret < 0) 708 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 709 710 return ret; 711 } 712 713 static u32 smsc95xx_get_link(struct net_device *net) 714 { 715 phy_read_status(net->phydev); 716 return net->phydev->link; 717 } 718 719 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, 720 u8 *data) 721 { 722 switch (sset) { 723 case ETH_SS_TEST: 724 net_selftest_get_strings(data); 725 break; 726 } 727 } 728 729 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) 730 { 731 switch (sset) { 732 case ETH_SS_TEST: 733 return net_selftest_get_count(); 734 default: 735 return -EOPNOTSUPP; 736 } 737 } 738 739 static const struct ethtool_ops smsc95xx_ethtool_ops = { 740 .get_link = smsc95xx_get_link, 741 .nway_reset = phy_ethtool_nway_reset, 742 .get_drvinfo = usbnet_get_drvinfo, 743 .get_msglevel = usbnet_get_msglevel, 744 .set_msglevel = usbnet_set_msglevel, 745 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 746 .get_eeprom = smsc95xx_ethtool_get_eeprom, 747 .set_eeprom = smsc95xx_ethtool_set_eeprom, 748 .get_regs_len = smsc95xx_ethtool_getregslen, 749 .get_regs = smsc95xx_ethtool_getregs, 750 .get_wol = smsc95xx_ethtool_get_wol, 751 .set_wol = smsc95xx_ethtool_set_wol, 752 .get_link_ksettings = phy_ethtool_get_link_ksettings, 753 .set_link_ksettings = phy_ethtool_set_link_ksettings, 754 .get_ts_info = ethtool_op_get_ts_info, 755 .self_test = net_selftest, 756 .get_strings = smsc95xx_ethtool_get_strings, 757 .get_sset_count = smsc95xx_ethtool_get_sset_count, 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) 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); 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_set_mac_address(dev); 870 if (ret < 0) 871 return ret; 872 873 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 874 dev->net->dev_addr); 875 876 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 877 if (ret < 0) 878 return ret; 879 880 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 881 read_buf); 882 883 read_buf |= HW_CFG_BIR_; 884 885 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 886 if (ret < 0) 887 return ret; 888 889 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 890 if (ret < 0) 891 return ret; 892 893 netif_dbg(dev, ifup, dev->net, 894 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 895 read_buf); 896 897 if (!turbo_mode) { 898 burst_cap = 0; 899 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 900 } else if (dev->udev->speed == USB_SPEED_HIGH) { 901 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 902 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 903 } else { 904 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 905 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 906 } 907 908 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 909 (ulong)dev->rx_urb_size); 910 911 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 912 if (ret < 0) 913 return ret; 914 915 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 916 if (ret < 0) 917 return ret; 918 919 netif_dbg(dev, ifup, dev->net, 920 "Read Value from BURST_CAP after writing: 0x%08x\n", 921 read_buf); 922 923 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 924 if (ret < 0) 925 return ret; 926 927 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 928 if (ret < 0) 929 return ret; 930 931 netif_dbg(dev, ifup, dev->net, 932 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 933 read_buf); 934 935 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 936 if (ret < 0) 937 return ret; 938 939 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 940 read_buf); 941 942 if (turbo_mode) 943 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 944 945 read_buf &= ~HW_CFG_RXDOFF_; 946 947 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 948 read_buf |= NET_IP_ALIGN << 9; 949 950 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 951 if (ret < 0) 952 return ret; 953 954 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 955 if (ret < 0) 956 return ret; 957 958 netif_dbg(dev, ifup, dev->net, 959 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 960 961 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 962 if (ret < 0) 963 return ret; 964 965 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 966 if (ret < 0) 967 return ret; 968 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 969 970 /* Configure GPIO pins as LED outputs */ 971 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 972 LED_GPIO_CFG_FDX_LED; 973 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 974 if (ret < 0) 975 return ret; 976 977 /* Init Tx */ 978 ret = smsc95xx_write_reg(dev, FLOW, 0); 979 if (ret < 0) 980 return ret; 981 982 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 983 if (ret < 0) 984 return ret; 985 986 /* Don't need mac_cr_lock during initialisation */ 987 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 988 if (ret < 0) 989 return ret; 990 991 /* Init Rx */ 992 /* Set Vlan */ 993 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 994 if (ret < 0) 995 return ret; 996 997 /* Enable or disable checksum offload engines */ 998 ret = smsc95xx_set_features(dev->net, dev->net->features); 999 if (ret < 0) { 1000 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1001 return ret; 1002 } 1003 1004 smsc95xx_set_multicast(dev->net); 1005 1006 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1007 if (ret < 0) 1008 return ret; 1009 1010 /* enable PHY interrupts */ 1011 read_buf |= INT_EP_CTL_PHY_INT_; 1012 1013 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1014 if (ret < 0) 1015 return ret; 1016 1017 ret = smsc95xx_start_tx_path(dev); 1018 if (ret < 0) { 1019 netdev_warn(dev->net, "Failed to start TX path\n"); 1020 return ret; 1021 } 1022 1023 ret = smsc95xx_start_rx_path(dev); 1024 if (ret < 0) { 1025 netdev_warn(dev->net, "Failed to start RX path\n"); 1026 return ret; 1027 } 1028 1029 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1030 return 0; 1031 } 1032 1033 static const struct net_device_ops smsc95xx_netdev_ops = { 1034 .ndo_open = usbnet_open, 1035 .ndo_stop = usbnet_stop, 1036 .ndo_start_xmit = usbnet_start_xmit, 1037 .ndo_tx_timeout = usbnet_tx_timeout, 1038 .ndo_change_mtu = usbnet_change_mtu, 1039 .ndo_get_stats64 = dev_get_tstats64, 1040 .ndo_set_mac_address = eth_mac_addr, 1041 .ndo_validate_addr = eth_validate_addr, 1042 .ndo_eth_ioctl = smsc95xx_ioctl, 1043 .ndo_set_rx_mode = smsc95xx_set_multicast, 1044 .ndo_set_features = smsc95xx_set_features, 1045 }; 1046 1047 static void smsc95xx_handle_link_change(struct net_device *net) 1048 { 1049 struct usbnet *dev = netdev_priv(net); 1050 1051 phy_print_status(net->phydev); 1052 smsc95xx_mac_update_fullduplex(dev); 1053 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1054 } 1055 1056 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1057 { 1058 struct smsc95xx_priv *pdata; 1059 bool is_internal_phy; 1060 char usb_path[64]; 1061 int ret, phy_irq; 1062 u32 val; 1063 1064 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1065 1066 ret = usbnet_get_endpoints(dev, intf); 1067 if (ret < 0) { 1068 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1069 return ret; 1070 } 1071 1072 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1073 if (!pdata) 1074 return -ENOMEM; 1075 1076 dev->driver_priv = pdata; 1077 1078 spin_lock_init(&pdata->mac_cr_lock); 1079 1080 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1081 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1082 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1083 * it is transmitted as all ones. The zero transmitted checksum means 1084 * transmitter generated no checksum. Hence, enable csum offload only 1085 * for ipv4 packets. 1086 */ 1087 if (DEFAULT_TX_CSUM_ENABLE) 1088 dev->net->features |= NETIF_F_IP_CSUM; 1089 if (DEFAULT_RX_CSUM_ENABLE) 1090 dev->net->features |= NETIF_F_RXCSUM; 1091 1092 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1093 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1094 1095 smsc95xx_init_mac_address(dev); 1096 1097 /* Init all registers */ 1098 ret = smsc95xx_reset(dev); 1099 if (ret) 1100 goto free_pdata; 1101 1102 /* create irq domain for use by PHY driver and GPIO consumers */ 1103 usb_make_path(dev->udev, usb_path, sizeof(usb_path)); 1104 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path); 1105 if (!pdata->irqfwnode) { 1106 ret = -ENOMEM; 1107 goto free_pdata; 1108 } 1109 1110 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode, 1111 SMSC95XX_NR_IRQS, 1112 &irq_domain_simple_ops, 1113 pdata); 1114 if (!pdata->irqdomain) { 1115 ret = -ENOMEM; 1116 goto free_irqfwnode; 1117 } 1118 1119 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ); 1120 if (!phy_irq) { 1121 ret = -ENOENT; 1122 goto remove_irqdomain; 1123 } 1124 1125 pdata->irqchip = dummy_irq_chip; 1126 pdata->irqchip.name = SMSC_CHIPNAME; 1127 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip, 1128 handle_simple_irq, "phy"); 1129 1130 pdata->mdiobus = mdiobus_alloc(); 1131 if (!pdata->mdiobus) { 1132 ret = -ENOMEM; 1133 goto dispose_irq; 1134 } 1135 1136 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1137 if (ret < 0) 1138 goto free_mdio; 1139 1140 is_internal_phy = !(val & HW_CFG_PSEL_); 1141 if (is_internal_phy) 1142 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1143 1144 pdata->mdiobus->priv = dev; 1145 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1146 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1147 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1148 pdata->mdiobus->parent = &dev->udev->dev; 1149 1150 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1151 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1152 1153 ret = mdiobus_register(pdata->mdiobus); 1154 if (ret) { 1155 netdev_err(dev->net, "Could not register MDIO bus\n"); 1156 goto free_mdio; 1157 } 1158 1159 pdata->phydev = phy_find_first(pdata->mdiobus); 1160 if (!pdata->phydev) { 1161 netdev_err(dev->net, "no PHY found\n"); 1162 ret = -ENODEV; 1163 goto unregister_mdio; 1164 } 1165 1166 pdata->phydev->irq = phy_irq; 1167 pdata->phydev->is_internal = is_internal_phy; 1168 1169 /* detect device revision as different features may be available */ 1170 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1171 if (ret < 0) 1172 goto unregister_mdio; 1173 1174 val >>= 16; 1175 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1176 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1177 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1178 FEATURE_PHY_NLP_CROSSOVER | 1179 FEATURE_REMOTE_WAKEUP); 1180 else if (val == ID_REV_CHIP_ID_9512_) 1181 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1182 1183 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1184 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1185 dev->net->flags |= IFF_MULTICAST; 1186 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1187 dev->net->min_mtu = ETH_MIN_MTU; 1188 dev->net->max_mtu = ETH_DATA_LEN; 1189 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1190 1191 ret = phy_connect_direct(dev->net, pdata->phydev, 1192 &smsc95xx_handle_link_change, 1193 PHY_INTERFACE_MODE_MII); 1194 if (ret) { 1195 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1196 goto unregister_mdio; 1197 } 1198 1199 phy_attached_info(dev->net->phydev); 1200 1201 return 0; 1202 1203 unregister_mdio: 1204 mdiobus_unregister(pdata->mdiobus); 1205 1206 free_mdio: 1207 mdiobus_free(pdata->mdiobus); 1208 1209 dispose_irq: 1210 irq_dispose_mapping(phy_irq); 1211 1212 remove_irqdomain: 1213 irq_domain_remove(pdata->irqdomain); 1214 1215 free_irqfwnode: 1216 irq_domain_free_fwnode(pdata->irqfwnode); 1217 1218 free_pdata: 1219 kfree(pdata); 1220 return ret; 1221 } 1222 1223 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1224 { 1225 struct smsc95xx_priv *pdata = dev->driver_priv; 1226 1227 phy_disconnect(dev->net->phydev); 1228 mdiobus_unregister(pdata->mdiobus); 1229 mdiobus_free(pdata->mdiobus); 1230 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); 1231 irq_domain_remove(pdata->irqdomain); 1232 irq_domain_free_fwnode(pdata->irqfwnode); 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 phy_stop(dev->net->phydev); 1247 1248 return 0; 1249 } 1250 1251 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1252 { 1253 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1254 return crc << ((filter % 2) * 16); 1255 } 1256 1257 static int smsc95xx_link_ok(struct usbnet *dev) 1258 { 1259 struct smsc95xx_priv *pdata = dev->driver_priv; 1260 int ret; 1261 1262 /* first, a dummy read, needed to latch some MII phys */ 1263 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1264 if (ret < 0) 1265 return ret; 1266 1267 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1268 if (ret < 0) 1269 return ret; 1270 1271 return !!(ret & BMSR_LSTATUS); 1272 } 1273 1274 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1275 { 1276 struct smsc95xx_priv *pdata = dev->driver_priv; 1277 u32 val; 1278 int ret; 1279 1280 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1281 if (ret < 0) 1282 return ret; 1283 1284 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1285 val |= PM_CTL_SUS_MODE_0; 1286 1287 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1288 if (ret < 0) 1289 return ret; 1290 1291 /* clear wol status */ 1292 val &= ~PM_CTL_WUPS_; 1293 val |= PM_CTL_WUPS_WOL_; 1294 1295 /* enable energy detection */ 1296 if (pdata->wolopts & WAKE_PHY) 1297 val |= PM_CTL_WUPS_ED_; 1298 1299 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1300 if (ret < 0) 1301 return ret; 1302 1303 /* read back PM_CTRL */ 1304 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1305 if (ret < 0) 1306 return ret; 1307 1308 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1309 1310 return 0; 1311 } 1312 1313 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1314 { 1315 struct smsc95xx_priv *pdata = dev->driver_priv; 1316 int ret, phy_id = pdata->phydev->mdio.addr; 1317 u32 val; 1318 1319 /* reconfigure link pulse detection timing for 1320 * compatibility with non-standard link partners 1321 */ 1322 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1323 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, 1324 PHY_EDPD_CONFIG_DEFAULT); 1325 1326 /* enable energy detect power-down mode */ 1327 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); 1328 if (ret < 0) 1329 return ret; 1330 1331 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1332 1333 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret); 1334 1335 /* enter SUSPEND1 mode */ 1336 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1337 if (ret < 0) 1338 return ret; 1339 1340 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1341 val |= PM_CTL_SUS_MODE_1; 1342 1343 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1344 if (ret < 0) 1345 return ret; 1346 1347 /* clear wol status, enable energy detection */ 1348 val &= ~PM_CTL_WUPS_; 1349 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1350 1351 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1352 if (ret < 0) 1353 return ret; 1354 1355 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1356 1357 return 0; 1358 } 1359 1360 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1361 { 1362 struct smsc95xx_priv *pdata = dev->driver_priv; 1363 u32 val; 1364 int ret; 1365 1366 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1367 if (ret < 0) 1368 return ret; 1369 1370 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1371 val |= PM_CTL_SUS_MODE_2; 1372 1373 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1374 if (ret < 0) 1375 return ret; 1376 1377 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1378 1379 return 0; 1380 } 1381 1382 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1383 { 1384 struct smsc95xx_priv *pdata = dev->driver_priv; 1385 u32 val; 1386 int ret; 1387 1388 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val); 1389 if (ret < 0) 1390 return ret; 1391 1392 if (val & RX_FIFO_INF_USED_) { 1393 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1394 return -EBUSY; 1395 } 1396 1397 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1398 if (ret < 0) 1399 return ret; 1400 1401 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1402 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1403 1404 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1405 if (ret < 0) 1406 return ret; 1407 1408 /* clear wol status */ 1409 val &= ~PM_CTL_WUPS_; 1410 val |= PM_CTL_WUPS_WOL_; 1411 1412 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1413 if (ret < 0) 1414 return ret; 1415 1416 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1417 1418 return 0; 1419 } 1420 1421 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1422 { 1423 struct smsc95xx_priv *pdata = dev->driver_priv; 1424 1425 if (!netif_running(dev->net)) { 1426 /* interface is ifconfig down so fully power down hw */ 1427 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1428 return smsc95xx_enter_suspend2(dev); 1429 } 1430 1431 if (!link_up) { 1432 /* link is down so enter EDPD mode, but only if device can 1433 * reliably resume from it. This check should be redundant 1434 * as current FEATURE_REMOTE_WAKEUP parts also support 1435 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1436 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1437 netdev_warn(dev->net, "EDPD not supported\n"); 1438 return -EBUSY; 1439 } 1440 1441 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1442 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1443 return smsc95xx_enter_suspend1(dev); 1444 } 1445 1446 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1447 return smsc95xx_enter_suspend3(dev); 1448 } 1449 1450 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1451 { 1452 struct usbnet *dev = usb_get_intfdata(intf); 1453 struct smsc95xx_priv *pdata = dev->driver_priv; 1454 u32 val, link_up; 1455 int ret; 1456 1457 pdata->pm_task = current; 1458 1459 ret = usbnet_suspend(intf, message); 1460 if (ret < 0) { 1461 netdev_warn(dev->net, "usbnet_suspend error\n"); 1462 pdata->pm_task = NULL; 1463 return ret; 1464 } 1465 1466 if (pdata->suspend_flags) { 1467 netdev_warn(dev->net, "error during last resume\n"); 1468 pdata->suspend_flags = 0; 1469 } 1470 1471 link_up = smsc95xx_link_ok(dev); 1472 1473 if (message.event == PM_EVENT_AUTO_SUSPEND && 1474 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1475 ret = smsc95xx_autosuspend(dev, link_up); 1476 goto done; 1477 } 1478 1479 /* if we get this far we're not autosuspending */ 1480 /* if no wol options set, or if link is down and we're not waking on 1481 * PHY activity, enter lowest power SUSPEND2 mode 1482 */ 1483 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1484 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1485 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1486 1487 /* disable energy detect (link up) & wake up events */ 1488 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1489 if (ret < 0) 1490 goto done; 1491 1492 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1493 1494 ret = smsc95xx_write_reg(dev, WUCSR, val); 1495 if (ret < 0) 1496 goto done; 1497 1498 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1499 if (ret < 0) 1500 goto done; 1501 1502 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1503 1504 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1505 if (ret < 0) 1506 goto done; 1507 1508 ret = smsc95xx_enter_suspend2(dev); 1509 goto done; 1510 } 1511 1512 if (pdata->wolopts & WAKE_PHY) { 1513 /* if link is down then configure EDPD and enter SUSPEND1, 1514 * otherwise enter SUSPEND0 below 1515 */ 1516 if (!link_up) { 1517 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1518 ret = smsc95xx_enter_suspend1(dev); 1519 goto done; 1520 } 1521 } 1522 1523 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1524 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1525 u32 command[2]; 1526 u32 offset[2]; 1527 u32 crc[4]; 1528 int wuff_filter_count = 1529 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1530 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1531 int i, filter = 0; 1532 1533 if (!filter_mask) { 1534 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1535 ret = -ENOMEM; 1536 goto done; 1537 } 1538 1539 memset(command, 0, sizeof(command)); 1540 memset(offset, 0, sizeof(offset)); 1541 memset(crc, 0, sizeof(crc)); 1542 1543 if (pdata->wolopts & WAKE_BCAST) { 1544 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1545 netdev_info(dev->net, "enabling broadcast detection\n"); 1546 filter_mask[filter * 4] = 0x003F; 1547 filter_mask[filter * 4 + 1] = 0x00; 1548 filter_mask[filter * 4 + 2] = 0x00; 1549 filter_mask[filter * 4 + 3] = 0x00; 1550 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1551 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1552 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1553 filter++; 1554 } 1555 1556 if (pdata->wolopts & WAKE_MCAST) { 1557 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1558 netdev_info(dev->net, "enabling multicast detection\n"); 1559 filter_mask[filter * 4] = 0x0007; 1560 filter_mask[filter * 4 + 1] = 0x00; 1561 filter_mask[filter * 4 + 2] = 0x00; 1562 filter_mask[filter * 4 + 3] = 0x00; 1563 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1564 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1565 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1566 filter++; 1567 } 1568 1569 if (pdata->wolopts & WAKE_ARP) { 1570 const u8 arp[] = {0x08, 0x06}; 1571 netdev_info(dev->net, "enabling ARP detection\n"); 1572 filter_mask[filter * 4] = 0x0003; 1573 filter_mask[filter * 4 + 1] = 0x00; 1574 filter_mask[filter * 4 + 2] = 0x00; 1575 filter_mask[filter * 4 + 3] = 0x00; 1576 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1577 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1578 crc[filter/2] |= smsc_crc(arp, 2, filter); 1579 filter++; 1580 } 1581 1582 if (pdata->wolopts & WAKE_UCAST) { 1583 netdev_info(dev->net, "enabling unicast detection\n"); 1584 filter_mask[filter * 4] = 0x003F; 1585 filter_mask[filter * 4 + 1] = 0x00; 1586 filter_mask[filter * 4 + 2] = 0x00; 1587 filter_mask[filter * 4 + 3] = 0x00; 1588 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1589 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1590 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1591 filter++; 1592 } 1593 1594 for (i = 0; i < (wuff_filter_count * 4); i++) { 1595 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]); 1596 if (ret < 0) { 1597 kfree(filter_mask); 1598 goto done; 1599 } 1600 } 1601 kfree(filter_mask); 1602 1603 for (i = 0; i < (wuff_filter_count / 4); i++) { 1604 ret = smsc95xx_write_reg(dev, WUFF, command[i]); 1605 if (ret < 0) 1606 goto done; 1607 } 1608 1609 for (i = 0; i < (wuff_filter_count / 4); i++) { 1610 ret = smsc95xx_write_reg(dev, WUFF, offset[i]); 1611 if (ret < 0) 1612 goto done; 1613 } 1614 1615 for (i = 0; i < (wuff_filter_count / 2); i++) { 1616 ret = smsc95xx_write_reg(dev, WUFF, crc[i]); 1617 if (ret < 0) 1618 goto done; 1619 } 1620 1621 /* clear any pending pattern match packet status */ 1622 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1623 if (ret < 0) 1624 goto done; 1625 1626 val |= WUCSR_WUFR_; 1627 1628 ret = smsc95xx_write_reg(dev, WUCSR, val); 1629 if (ret < 0) 1630 goto done; 1631 } 1632 1633 if (pdata->wolopts & WAKE_MAGIC) { 1634 /* clear any pending magic packet status */ 1635 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1636 if (ret < 0) 1637 goto done; 1638 1639 val |= WUCSR_MPR_; 1640 1641 ret = smsc95xx_write_reg(dev, WUCSR, val); 1642 if (ret < 0) 1643 goto done; 1644 } 1645 1646 /* enable/disable wakeup sources */ 1647 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1648 if (ret < 0) 1649 goto done; 1650 1651 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1652 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1653 val |= WUCSR_WAKE_EN_; 1654 } else { 1655 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1656 val &= ~WUCSR_WAKE_EN_; 1657 } 1658 1659 if (pdata->wolopts & WAKE_MAGIC) { 1660 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1661 val |= WUCSR_MPEN_; 1662 } else { 1663 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1664 val &= ~WUCSR_MPEN_; 1665 } 1666 1667 ret = smsc95xx_write_reg(dev, WUCSR, val); 1668 if (ret < 0) 1669 goto done; 1670 1671 /* enable wol wakeup source */ 1672 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1673 if (ret < 0) 1674 goto done; 1675 1676 val |= PM_CTL_WOL_EN_; 1677 1678 /* phy energy detect wakeup source */ 1679 if (pdata->wolopts & WAKE_PHY) 1680 val |= PM_CTL_ED_EN_; 1681 1682 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1683 if (ret < 0) 1684 goto done; 1685 1686 /* enable receiver to enable frame reception */ 1687 smsc95xx_start_rx_path(dev); 1688 1689 /* some wol options are enabled, so enter SUSPEND0 */ 1690 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1691 ret = smsc95xx_enter_suspend0(dev); 1692 1693 done: 1694 /* 1695 * TODO: resume() might need to handle the suspend failure 1696 * in system sleep 1697 */ 1698 if (ret && PMSG_IS_AUTO(message)) 1699 usbnet_resume(intf); 1700 1701 pdata->pm_task = NULL; 1702 return ret; 1703 } 1704 1705 static int smsc95xx_resume(struct usb_interface *intf) 1706 { 1707 struct usbnet *dev = usb_get_intfdata(intf); 1708 struct smsc95xx_priv *pdata; 1709 u8 suspend_flags; 1710 int ret; 1711 u32 val; 1712 1713 BUG_ON(!dev); 1714 pdata = dev->driver_priv; 1715 suspend_flags = pdata->suspend_flags; 1716 1717 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1718 1719 /* do this first to ensure it's cleared even in error case */ 1720 pdata->suspend_flags = 0; 1721 1722 pdata->pm_task = current; 1723 1724 if (suspend_flags & SUSPEND_ALLMODES) { 1725 /* clear wake-up sources */ 1726 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1727 if (ret < 0) 1728 goto done; 1729 1730 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1731 1732 ret = smsc95xx_write_reg(dev, WUCSR, val); 1733 if (ret < 0) 1734 goto done; 1735 1736 /* clear wake-up status */ 1737 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1738 if (ret < 0) 1739 goto done; 1740 1741 val &= ~PM_CTL_WOL_EN_; 1742 val |= PM_CTL_WUPS_; 1743 1744 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1745 if (ret < 0) 1746 goto done; 1747 } 1748 1749 phy_init_hw(pdata->phydev); 1750 1751 ret = usbnet_resume(intf); 1752 if (ret < 0) 1753 netdev_warn(dev->net, "usbnet_resume error\n"); 1754 1755 done: 1756 pdata->pm_task = NULL; 1757 return ret; 1758 } 1759 1760 static int smsc95xx_reset_resume(struct usb_interface *intf) 1761 { 1762 struct usbnet *dev = usb_get_intfdata(intf); 1763 struct smsc95xx_priv *pdata = dev->driver_priv; 1764 int ret; 1765 1766 pdata->pm_task = current; 1767 ret = smsc95xx_reset(dev); 1768 pdata->pm_task = NULL; 1769 if (ret < 0) 1770 return ret; 1771 1772 return smsc95xx_resume(intf); 1773 } 1774 1775 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1776 { 1777 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1778 skb->ip_summed = CHECKSUM_COMPLETE; 1779 skb_trim(skb, skb->len - 2); 1780 } 1781 1782 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1783 { 1784 /* This check is no longer done by usbnet */ 1785 if (skb->len < dev->net->hard_header_len) 1786 return 0; 1787 1788 while (skb->len > 0) { 1789 u32 header, align_count; 1790 struct sk_buff *ax_skb; 1791 unsigned char *packet; 1792 u16 size; 1793 1794 header = get_unaligned_le32(skb->data); 1795 skb_pull(skb, 4 + NET_IP_ALIGN); 1796 packet = skb->data; 1797 1798 /* get the packet length */ 1799 size = (u16)((header & RX_STS_FL_) >> 16); 1800 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1801 1802 if (unlikely(header & RX_STS_ES_)) { 1803 netif_dbg(dev, rx_err, dev->net, 1804 "Error header=0x%08x\n", header); 1805 dev->net->stats.rx_errors++; 1806 dev->net->stats.rx_dropped++; 1807 1808 if (header & RX_STS_CRC_) { 1809 dev->net->stats.rx_crc_errors++; 1810 } else { 1811 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1812 dev->net->stats.rx_frame_errors++; 1813 1814 if ((header & RX_STS_LE_) && 1815 (!(header & RX_STS_FT_))) 1816 dev->net->stats.rx_length_errors++; 1817 } 1818 } else { 1819 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1820 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1821 netif_dbg(dev, rx_err, dev->net, 1822 "size err header=0x%08x\n", header); 1823 return 0; 1824 } 1825 1826 /* last frame in this batch */ 1827 if (skb->len == size) { 1828 if (dev->net->features & NETIF_F_RXCSUM) 1829 smsc95xx_rx_csum_offload(skb); 1830 skb_trim(skb, skb->len - 4); /* remove fcs */ 1831 skb->truesize = size + sizeof(struct sk_buff); 1832 1833 return 1; 1834 } 1835 1836 ax_skb = skb_clone(skb, GFP_ATOMIC); 1837 if (unlikely(!ax_skb)) { 1838 netdev_warn(dev->net, "Error allocating skb\n"); 1839 return 0; 1840 } 1841 1842 ax_skb->len = size; 1843 ax_skb->data = packet; 1844 skb_set_tail_pointer(ax_skb, size); 1845 1846 if (dev->net->features & NETIF_F_RXCSUM) 1847 smsc95xx_rx_csum_offload(ax_skb); 1848 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1849 ax_skb->truesize = size + sizeof(struct sk_buff); 1850 1851 usbnet_skb_return(dev, ax_skb); 1852 } 1853 1854 skb_pull(skb, size); 1855 1856 /* padding bytes before the next frame starts */ 1857 if (skb->len) 1858 skb_pull(skb, align_count); 1859 } 1860 1861 return 1; 1862 } 1863 1864 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1865 { 1866 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1867 u16 high_16 = low_16 + skb->csum_offset; 1868 return (high_16 << 16) | low_16; 1869 } 1870 1871 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1872 * transmission. This is fairly unlikely, only seems to trigger with some 1873 * short TCP ACK packets sent. 1874 * 1875 * Note, this calculation should probably check for the alignment of the 1876 * data as well, but a straight check for csum being in the last four bytes 1877 * of the packet should be ok for now. 1878 */ 1879 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1880 { 1881 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1882 1883 if (skb->len <= 45) 1884 return false; 1885 return skb->csum_offset < (len - (4 + 1)); 1886 } 1887 1888 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1889 struct sk_buff *skb, gfp_t flags) 1890 { 1891 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1892 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1893 u32 tx_cmd_a, tx_cmd_b; 1894 void *ptr; 1895 1896 /* We do not advertise SG, so skbs should be already linearized */ 1897 BUG_ON(skb_shinfo(skb)->nr_frags); 1898 1899 /* Make writable and expand header space by overhead if required */ 1900 if (skb_cow_head(skb, overhead)) { 1901 /* Must deallocate here as returning NULL to indicate error 1902 * means the skb won't be deallocated in the caller. 1903 */ 1904 dev_kfree_skb_any(skb); 1905 return NULL; 1906 } 1907 1908 tx_cmd_b = (u32)skb->len; 1909 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1910 1911 if (csum) { 1912 if (!smsc95xx_can_tx_checksum(skb)) { 1913 /* workaround - hardware tx checksum does not work 1914 * properly with extremely small packets */ 1915 long csstart = skb_checksum_start_offset(skb); 1916 __wsum calc = csum_partial(skb->data + csstart, 1917 skb->len - csstart, 0); 1918 *((__sum16 *)(skb->data + csstart 1919 + skb->csum_offset)) = csum_fold(calc); 1920 1921 csum = false; 1922 } else { 1923 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1924 ptr = skb_push(skb, 4); 1925 put_unaligned_le32(csum_preamble, ptr); 1926 1927 tx_cmd_a += 4; 1928 tx_cmd_b += 4; 1929 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1930 } 1931 } 1932 1933 ptr = skb_push(skb, 8); 1934 put_unaligned_le32(tx_cmd_a, ptr); 1935 put_unaligned_le32(tx_cmd_b, ptr+4); 1936 1937 return skb; 1938 } 1939 1940 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1941 { 1942 struct smsc95xx_priv *pdata = dev->driver_priv; 1943 1944 dev->intf->needs_remote_wakeup = on; 1945 1946 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1947 return 0; 1948 1949 /* this chip revision isn't capable of remote wakeup */ 1950 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1951 1952 if (on) 1953 usb_autopm_get_interface_no_resume(dev->intf); 1954 else 1955 usb_autopm_put_interface(dev->intf); 1956 1957 return 0; 1958 } 1959 1960 static const struct driver_info smsc95xx_info = { 1961 .description = "smsc95xx USB 2.0 Ethernet", 1962 .bind = smsc95xx_bind, 1963 .unbind = smsc95xx_unbind, 1964 .reset = smsc95xx_reset, 1965 .check_connect = smsc95xx_start_phy, 1966 .stop = smsc95xx_stop, 1967 .rx_fixup = smsc95xx_rx_fixup, 1968 .tx_fixup = smsc95xx_tx_fixup, 1969 .status = smsc95xx_status, 1970 .manage_power = smsc95xx_manage_power, 1971 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 1972 }; 1973 1974 static const struct usb_device_id products[] = { 1975 { 1976 /* SMSC9500 USB Ethernet Device */ 1977 USB_DEVICE(0x0424, 0x9500), 1978 .driver_info = (unsigned long) &smsc95xx_info, 1979 }, 1980 { 1981 /* SMSC9505 USB Ethernet Device */ 1982 USB_DEVICE(0x0424, 0x9505), 1983 .driver_info = (unsigned long) &smsc95xx_info, 1984 }, 1985 { 1986 /* SMSC9500A USB Ethernet Device */ 1987 USB_DEVICE(0x0424, 0x9E00), 1988 .driver_info = (unsigned long) &smsc95xx_info, 1989 }, 1990 { 1991 /* SMSC9505A USB Ethernet Device */ 1992 USB_DEVICE(0x0424, 0x9E01), 1993 .driver_info = (unsigned long) &smsc95xx_info, 1994 }, 1995 { 1996 /* SMSC9512/9514 USB Hub & Ethernet Device */ 1997 USB_DEVICE(0x0424, 0xec00), 1998 .driver_info = (unsigned long) &smsc95xx_info, 1999 }, 2000 { 2001 /* SMSC9500 USB Ethernet Device (SAL10) */ 2002 USB_DEVICE(0x0424, 0x9900), 2003 .driver_info = (unsigned long) &smsc95xx_info, 2004 }, 2005 { 2006 /* SMSC9505 USB Ethernet Device (SAL10) */ 2007 USB_DEVICE(0x0424, 0x9901), 2008 .driver_info = (unsigned long) &smsc95xx_info, 2009 }, 2010 { 2011 /* SMSC9500A USB Ethernet Device (SAL10) */ 2012 USB_DEVICE(0x0424, 0x9902), 2013 .driver_info = (unsigned long) &smsc95xx_info, 2014 }, 2015 { 2016 /* SMSC9505A USB Ethernet Device (SAL10) */ 2017 USB_DEVICE(0x0424, 0x9903), 2018 .driver_info = (unsigned long) &smsc95xx_info, 2019 }, 2020 { 2021 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2022 USB_DEVICE(0x0424, 0x9904), 2023 .driver_info = (unsigned long) &smsc95xx_info, 2024 }, 2025 { 2026 /* SMSC9500A USB Ethernet Device (HAL) */ 2027 USB_DEVICE(0x0424, 0x9905), 2028 .driver_info = (unsigned long) &smsc95xx_info, 2029 }, 2030 { 2031 /* SMSC9505A USB Ethernet Device (HAL) */ 2032 USB_DEVICE(0x0424, 0x9906), 2033 .driver_info = (unsigned long) &smsc95xx_info, 2034 }, 2035 { 2036 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2037 USB_DEVICE(0x0424, 0x9907), 2038 .driver_info = (unsigned long) &smsc95xx_info, 2039 }, 2040 { 2041 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2042 USB_DEVICE(0x0424, 0x9908), 2043 .driver_info = (unsigned long) &smsc95xx_info, 2044 }, 2045 { 2046 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2047 USB_DEVICE(0x0424, 0x9909), 2048 .driver_info = (unsigned long) &smsc95xx_info, 2049 }, 2050 { 2051 /* SMSC LAN9530 USB Ethernet Device */ 2052 USB_DEVICE(0x0424, 0x9530), 2053 .driver_info = (unsigned long) &smsc95xx_info, 2054 }, 2055 { 2056 /* SMSC LAN9730 USB Ethernet Device */ 2057 USB_DEVICE(0x0424, 0x9730), 2058 .driver_info = (unsigned long) &smsc95xx_info, 2059 }, 2060 { 2061 /* SMSC LAN89530 USB Ethernet Device */ 2062 USB_DEVICE(0x0424, 0x9E08), 2063 .driver_info = (unsigned long) &smsc95xx_info, 2064 }, 2065 { 2066 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ 2067 USB_DEVICE(0x184F, 0x0051), 2068 .driver_info = (unsigned long)&smsc95xx_info, 2069 }, 2070 { }, /* END */ 2071 }; 2072 MODULE_DEVICE_TABLE(usb, products); 2073 2074 static struct usb_driver smsc95xx_driver = { 2075 .name = "smsc95xx", 2076 .id_table = products, 2077 .probe = usbnet_probe, 2078 .suspend = smsc95xx_suspend, 2079 .resume = smsc95xx_resume, 2080 .reset_resume = smsc95xx_reset_resume, 2081 .disconnect = usbnet_disconnect, 2082 .disable_hub_initiated_lpm = 1, 2083 .supports_autosuspend = 1, 2084 }; 2085 2086 module_usb_driver(smsc95xx_driver); 2087 2088 MODULE_AUTHOR("Nancy Lin"); 2089 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2090 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2091 MODULE_LICENSE("GPL"); 2092