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 if (current != pdata->pm_task) 90 fn = usbnet_read_cmd; 91 else 92 fn = usbnet_read_cmd_nopm; 93 94 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 95 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 96 0, index, &buf, 4); 97 if (ret < 0) { 98 if (ret != -ENODEV) 99 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 100 index, ret); 101 return ret; 102 } 103 104 le32_to_cpus(&buf); 105 *data = buf; 106 107 return ret; 108 } 109 110 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 111 u32 data) 112 { 113 struct smsc95xx_priv *pdata = dev->driver_priv; 114 u32 buf; 115 int ret; 116 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 117 118 if (current != pdata->pm_task) 119 fn = usbnet_write_cmd; 120 else 121 fn = usbnet_write_cmd_nopm; 122 123 buf = data; 124 cpu_to_le32s(&buf); 125 126 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 127 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 128 0, index, &buf, 4); 129 if (ret < 0 && ret != -ENODEV) 130 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 131 index, ret); 132 133 return ret; 134 } 135 136 /* Loop until the read is completed with timeout 137 * called with phy_mutex held */ 138 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) 139 { 140 unsigned long start_time = jiffies; 141 u32 val; 142 int ret; 143 144 do { 145 ret = smsc95xx_read_reg(dev, MII_ADDR, &val); 146 if (ret < 0) { 147 /* Ignore -ENODEV error during disconnect() */ 148 if (ret == -ENODEV) 149 return 0; 150 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 151 return ret; 152 } 153 154 if (!(val & MII_BUSY_)) 155 return 0; 156 } while (!time_after(jiffies, start_time + HZ)); 157 158 return -EIO; 159 } 160 161 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 162 { 163 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 164 } 165 166 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx) 167 { 168 u32 val, addr; 169 int ret; 170 171 mutex_lock(&dev->phy_mutex); 172 173 /* confirm MII not busy */ 174 ret = smsc95xx_phy_wait_not_busy(dev); 175 if (ret < 0) { 176 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 177 goto done; 178 } 179 180 /* set the address, index & direction (read from PHY) */ 181 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 182 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 183 if (ret < 0) { 184 if (ret != -ENODEV) 185 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 186 goto done; 187 } 188 189 ret = smsc95xx_phy_wait_not_busy(dev); 190 if (ret < 0) { 191 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 192 goto done; 193 } 194 195 ret = smsc95xx_read_reg(dev, MII_DATA, &val); 196 if (ret < 0) { 197 if (ret != -ENODEV) 198 netdev_warn(dev->net, "Error reading MII_DATA\n"); 199 goto done; 200 } 201 202 ret = (u16)(val & 0xFFFF); 203 204 done: 205 mutex_unlock(&dev->phy_mutex); 206 207 /* Ignore -ENODEV error during disconnect() */ 208 if (ret == -ENODEV) 209 return 0; 210 return ret; 211 } 212 213 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx, 214 int regval) 215 { 216 u32 val, addr; 217 int ret; 218 219 mutex_lock(&dev->phy_mutex); 220 221 /* confirm MII not busy */ 222 ret = smsc95xx_phy_wait_not_busy(dev); 223 if (ret < 0) { 224 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 225 goto done; 226 } 227 228 val = regval; 229 ret = smsc95xx_write_reg(dev, MII_DATA, val); 230 if (ret < 0) { 231 if (ret != -ENODEV) 232 netdev_warn(dev->net, "Error writing MII_DATA\n"); 233 goto done; 234 } 235 236 /* set the address, index & direction (write to PHY) */ 237 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 238 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 239 if (ret < 0) { 240 if (ret != -ENODEV) 241 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 242 goto done; 243 } 244 245 ret = smsc95xx_phy_wait_not_busy(dev); 246 if (ret < 0) { 247 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 248 goto done; 249 } 250 251 done: 252 mutex_unlock(&dev->phy_mutex); 253 } 254 255 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 256 { 257 struct usbnet *dev = bus->priv; 258 259 return smsc95xx_mdio_read(dev, phy_id, idx); 260 } 261 262 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 263 u16 regval) 264 { 265 struct usbnet *dev = bus->priv; 266 267 smsc95xx_mdio_write(dev, phy_id, idx, regval); 268 return 0; 269 } 270 271 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 272 { 273 unsigned long start_time = jiffies; 274 u32 val; 275 int ret; 276 277 do { 278 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 279 if (ret < 0) { 280 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 281 return ret; 282 } 283 284 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 285 break; 286 udelay(40); 287 } while (!time_after(jiffies, start_time + HZ)); 288 289 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 290 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 291 return -EIO; 292 } 293 294 return 0; 295 } 296 297 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 298 { 299 unsigned long start_time = jiffies; 300 u32 val; 301 int ret; 302 303 do { 304 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 305 if (ret < 0) { 306 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 307 return ret; 308 } 309 310 if (!(val & E2P_CMD_BUSY_)) 311 return 0; 312 313 udelay(40); 314 } while (!time_after(jiffies, start_time + HZ)); 315 316 netdev_warn(dev->net, "EEPROM is busy\n"); 317 return -EIO; 318 } 319 320 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 321 u8 *data) 322 { 323 u32 val; 324 int i, ret; 325 326 BUG_ON(!dev); 327 BUG_ON(!data); 328 329 ret = smsc95xx_eeprom_confirm_not_busy(dev); 330 if (ret) 331 return ret; 332 333 for (i = 0; i < length; i++) { 334 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 335 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 336 if (ret < 0) { 337 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 338 return ret; 339 } 340 341 ret = smsc95xx_wait_eeprom(dev); 342 if (ret < 0) 343 return ret; 344 345 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 346 if (ret < 0) { 347 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 348 return ret; 349 } 350 351 data[i] = val & 0xFF; 352 offset++; 353 } 354 355 return 0; 356 } 357 358 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 359 u8 *data) 360 { 361 u32 val; 362 int i, ret; 363 364 BUG_ON(!dev); 365 BUG_ON(!data); 366 367 ret = smsc95xx_eeprom_confirm_not_busy(dev); 368 if (ret) 369 return ret; 370 371 /* Issue write/erase enable command */ 372 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 373 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 374 if (ret < 0) { 375 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 376 return ret; 377 } 378 379 ret = smsc95xx_wait_eeprom(dev); 380 if (ret < 0) 381 return ret; 382 383 for (i = 0; i < length; i++) { 384 385 /* Fill data register */ 386 val = data[i]; 387 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 388 if (ret < 0) { 389 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 390 return ret; 391 } 392 393 /* Send "write" command */ 394 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 395 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 396 if (ret < 0) { 397 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 398 return ret; 399 } 400 401 ret = smsc95xx_wait_eeprom(dev); 402 if (ret < 0) 403 return ret; 404 405 offset++; 406 } 407 408 return 0; 409 } 410 411 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 412 u32 data) 413 { 414 const u16 size = 4; 415 u32 buf; 416 int ret; 417 418 buf = data; 419 cpu_to_le32s(&buf); 420 421 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 422 USB_DIR_OUT | USB_TYPE_VENDOR | 423 USB_RECIP_DEVICE, 424 0, index, &buf, size); 425 if (ret < 0) 426 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 427 ret); 428 return ret; 429 } 430 431 /* returns hash bit number for given MAC address 432 * example: 433 * 01 00 5E 00 00 01 -> returns bit number 31 */ 434 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 435 { 436 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 437 } 438 439 static void smsc95xx_set_multicast(struct net_device *netdev) 440 { 441 struct usbnet *dev = netdev_priv(netdev); 442 struct smsc95xx_priv *pdata = dev->driver_priv; 443 unsigned long flags; 444 int ret; 445 446 pdata->hash_hi = 0; 447 pdata->hash_lo = 0; 448 449 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 450 451 if (dev->net->flags & IFF_PROMISC) { 452 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 453 pdata->mac_cr |= MAC_CR_PRMS_; 454 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 455 } else if (dev->net->flags & IFF_ALLMULTI) { 456 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 457 pdata->mac_cr |= MAC_CR_MCPAS_; 458 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 459 } else if (!netdev_mc_empty(dev->net)) { 460 struct netdev_hw_addr *ha; 461 462 pdata->mac_cr |= MAC_CR_HPFILT_; 463 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 464 465 netdev_for_each_mc_addr(ha, netdev) { 466 u32 bitnum = smsc95xx_hash(ha->addr); 467 u32 mask = 0x01 << (bitnum & 0x1F); 468 if (bitnum & 0x20) 469 pdata->hash_hi |= mask; 470 else 471 pdata->hash_lo |= mask; 472 } 473 474 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 475 pdata->hash_hi, pdata->hash_lo); 476 } else { 477 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 478 pdata->mac_cr &= 479 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 480 } 481 482 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 483 484 /* Initiate async writes, as we can't wait for completion here */ 485 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 486 if (ret < 0) 487 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 488 489 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 490 if (ret < 0) 491 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 492 493 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 494 if (ret < 0) 495 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 496 } 497 498 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 499 { 500 u32 flow = 0, afc_cfg; 501 struct smsc95xx_priv *pdata = dev->driver_priv; 502 bool tx_pause, rx_pause; 503 504 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 505 if (ret < 0) 506 return ret; 507 508 if (pdata->phydev->duplex == DUPLEX_FULL) { 509 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 510 511 if (rx_pause) 512 flow = 0xFFFF0002; 513 514 if (tx_pause) { 515 afc_cfg |= 0xF; 516 flow |= 0xFFFF0000; 517 } else { 518 afc_cfg &= ~0xF; 519 } 520 521 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 522 rx_pause ? "enabled" : "disabled", 523 tx_pause ? "enabled" : "disabled"); 524 } else { 525 netif_dbg(dev, link, dev->net, "half duplex\n"); 526 afc_cfg |= 0xF; 527 } 528 529 ret = smsc95xx_write_reg(dev, FLOW, flow); 530 if (ret < 0) 531 return ret; 532 533 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 534 } 535 536 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) 537 { 538 struct smsc95xx_priv *pdata = dev->driver_priv; 539 unsigned long flags; 540 int ret; 541 542 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 543 if (pdata->phydev->duplex != DUPLEX_FULL) { 544 pdata->mac_cr &= ~MAC_CR_FDPX_; 545 pdata->mac_cr |= MAC_CR_RCVOWN_; 546 } else { 547 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 548 pdata->mac_cr |= MAC_CR_FDPX_; 549 } 550 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 551 552 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 553 if (ret < 0) { 554 if (ret != -ENODEV) 555 netdev_warn(dev->net, 556 "Error updating MAC full duplex mode\n"); 557 return; 558 } 559 560 ret = smsc95xx_phy_update_flowcontrol(dev); 561 if (ret < 0) 562 netdev_warn(dev->net, "Error updating PHY flow control\n"); 563 } 564 565 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 566 { 567 struct smsc95xx_priv *pdata = dev->driver_priv; 568 unsigned long flags; 569 u32 intdata; 570 571 if (urb->actual_length != 4) { 572 netdev_warn(dev->net, "unexpected urb length %d\n", 573 urb->actual_length); 574 return; 575 } 576 577 intdata = get_unaligned_le32(urb->transfer_buffer); 578 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 579 580 local_irq_save(flags); 581 582 if (intdata & INT_ENP_PHY_INT_) 583 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ); 584 else 585 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 586 intdata); 587 588 local_irq_restore(flags); 589 } 590 591 /* Enable or disable Tx & Rx checksum offload engines */ 592 static int smsc95xx_set_features(struct net_device *netdev, 593 netdev_features_t features) 594 { 595 struct usbnet *dev = netdev_priv(netdev); 596 u32 read_buf; 597 int ret; 598 599 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 600 if (ret < 0) 601 return ret; 602 603 if (features & NETIF_F_IP_CSUM) 604 read_buf |= Tx_COE_EN_; 605 else 606 read_buf &= ~Tx_COE_EN_; 607 608 if (features & NETIF_F_RXCSUM) 609 read_buf |= Rx_COE_EN_; 610 else 611 read_buf &= ~Rx_COE_EN_; 612 613 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 614 if (ret < 0) 615 return ret; 616 617 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 618 return 0; 619 } 620 621 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 622 { 623 return MAX_EEPROM_SIZE; 624 } 625 626 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 627 struct ethtool_eeprom *ee, u8 *data) 628 { 629 struct usbnet *dev = netdev_priv(netdev); 630 631 ee->magic = LAN95XX_EEPROM_MAGIC; 632 633 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 634 } 635 636 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 637 struct ethtool_eeprom *ee, u8 *data) 638 { 639 struct usbnet *dev = netdev_priv(netdev); 640 641 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 642 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 643 ee->magic); 644 return -EINVAL; 645 } 646 647 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 648 } 649 650 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 651 { 652 /* all smsc95xx registers */ 653 return COE_CR - ID_REV + sizeof(u32); 654 } 655 656 static void 657 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 658 void *buf) 659 { 660 struct usbnet *dev = netdev_priv(netdev); 661 unsigned int i, j; 662 int retval; 663 u32 *data = buf; 664 665 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 666 if (retval < 0) { 667 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 668 return; 669 } 670 671 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 672 retval = smsc95xx_read_reg(dev, i, &data[j]); 673 if (retval < 0) { 674 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 675 return; 676 } 677 } 678 } 679 680 static void smsc95xx_ethtool_get_wol(struct net_device *net, 681 struct ethtool_wolinfo *wolinfo) 682 { 683 struct usbnet *dev = netdev_priv(net); 684 struct smsc95xx_priv *pdata = dev->driver_priv; 685 686 wolinfo->supported = SUPPORTED_WAKE; 687 wolinfo->wolopts = pdata->wolopts; 688 } 689 690 static int smsc95xx_ethtool_set_wol(struct net_device *net, 691 struct ethtool_wolinfo *wolinfo) 692 { 693 struct usbnet *dev = netdev_priv(net); 694 struct smsc95xx_priv *pdata = dev->driver_priv; 695 int ret; 696 697 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 698 return -EINVAL; 699 700 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 701 702 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 703 if (ret < 0) 704 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 705 706 return ret; 707 } 708 709 static u32 smsc95xx_get_link(struct net_device *net) 710 { 711 phy_read_status(net->phydev); 712 return net->phydev->link; 713 } 714 715 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, 716 u8 *data) 717 { 718 switch (sset) { 719 case ETH_SS_TEST: 720 net_selftest_get_strings(data); 721 break; 722 } 723 } 724 725 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) 726 { 727 switch (sset) { 728 case ETH_SS_TEST: 729 return net_selftest_get_count(); 730 default: 731 return -EOPNOTSUPP; 732 } 733 } 734 735 static const struct ethtool_ops smsc95xx_ethtool_ops = { 736 .get_link = smsc95xx_get_link, 737 .nway_reset = phy_ethtool_nway_reset, 738 .get_drvinfo = usbnet_get_drvinfo, 739 .get_msglevel = usbnet_get_msglevel, 740 .set_msglevel = usbnet_set_msglevel, 741 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 742 .get_eeprom = smsc95xx_ethtool_get_eeprom, 743 .set_eeprom = smsc95xx_ethtool_set_eeprom, 744 .get_regs_len = smsc95xx_ethtool_getregslen, 745 .get_regs = smsc95xx_ethtool_getregs, 746 .get_wol = smsc95xx_ethtool_get_wol, 747 .set_wol = smsc95xx_ethtool_set_wol, 748 .get_link_ksettings = phy_ethtool_get_link_ksettings, 749 .set_link_ksettings = phy_ethtool_set_link_ksettings, 750 .get_ts_info = ethtool_op_get_ts_info, 751 .self_test = net_selftest, 752 .get_strings = smsc95xx_ethtool_get_strings, 753 .get_sset_count = smsc95xx_ethtool_get_sset_count, 754 }; 755 756 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 757 { 758 if (!netif_running(netdev)) 759 return -EINVAL; 760 761 return phy_mii_ioctl(netdev->phydev, rq, cmd); 762 } 763 764 static void smsc95xx_init_mac_address(struct usbnet *dev) 765 { 766 u8 addr[ETH_ALEN]; 767 768 /* maybe the boot loader passed the MAC address in devicetree */ 769 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 770 if (is_valid_ether_addr(dev->net->dev_addr)) { 771 /* device tree values are valid so use them */ 772 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 773 return; 774 } 775 } 776 777 /* try reading mac address from EEPROM */ 778 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 779 eth_hw_addr_set(dev->net, addr); 780 if (is_valid_ether_addr(dev->net->dev_addr)) { 781 /* eeprom values are valid so use them */ 782 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 783 return; 784 } 785 } 786 787 /* no useful static MAC address found. generate a random one */ 788 eth_hw_addr_random(dev->net); 789 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 790 } 791 792 static int smsc95xx_set_mac_address(struct usbnet *dev) 793 { 794 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 795 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 796 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 797 int ret; 798 799 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 800 if (ret < 0) 801 return ret; 802 803 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 804 } 805 806 /* starts the TX path */ 807 static int smsc95xx_start_tx_path(struct usbnet *dev) 808 { 809 struct smsc95xx_priv *pdata = dev->driver_priv; 810 unsigned long flags; 811 int ret; 812 813 /* Enable Tx at MAC */ 814 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 815 pdata->mac_cr |= MAC_CR_TXEN_; 816 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 817 818 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 819 if (ret < 0) 820 return ret; 821 822 /* Enable Tx at SCSRs */ 823 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 824 } 825 826 /* Starts the Receive path */ 827 static int smsc95xx_start_rx_path(struct usbnet *dev) 828 { 829 struct smsc95xx_priv *pdata = dev->driver_priv; 830 unsigned long flags; 831 832 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 833 pdata->mac_cr |= MAC_CR_RXEN_; 834 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 835 836 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 837 } 838 839 static int smsc95xx_reset(struct usbnet *dev) 840 { 841 struct smsc95xx_priv *pdata = dev->driver_priv; 842 u32 read_buf, write_buf, burst_cap; 843 int ret = 0, timeout; 844 845 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 846 847 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 848 if (ret < 0) 849 return ret; 850 851 timeout = 0; 852 do { 853 msleep(10); 854 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 855 if (ret < 0) 856 return ret; 857 timeout++; 858 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 859 860 if (timeout >= 100) { 861 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 862 return ret; 863 } 864 865 ret = smsc95xx_set_mac_address(dev); 866 if (ret < 0) 867 return ret; 868 869 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 870 dev->net->dev_addr); 871 872 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 873 if (ret < 0) 874 return ret; 875 876 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 877 read_buf); 878 879 read_buf |= HW_CFG_BIR_; 880 881 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 882 if (ret < 0) 883 return ret; 884 885 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 886 if (ret < 0) 887 return ret; 888 889 netif_dbg(dev, ifup, dev->net, 890 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 891 read_buf); 892 893 if (!turbo_mode) { 894 burst_cap = 0; 895 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 896 } else if (dev->udev->speed == USB_SPEED_HIGH) { 897 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 898 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 899 } else { 900 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 901 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 902 } 903 904 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 905 (ulong)dev->rx_urb_size); 906 907 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 908 if (ret < 0) 909 return ret; 910 911 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 912 if (ret < 0) 913 return ret; 914 915 netif_dbg(dev, ifup, dev->net, 916 "Read Value from BURST_CAP after writing: 0x%08x\n", 917 read_buf); 918 919 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 920 if (ret < 0) 921 return ret; 922 923 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 924 if (ret < 0) 925 return ret; 926 927 netif_dbg(dev, ifup, dev->net, 928 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 929 read_buf); 930 931 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 932 if (ret < 0) 933 return ret; 934 935 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 936 read_buf); 937 938 if (turbo_mode) 939 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 940 941 read_buf &= ~HW_CFG_RXDOFF_; 942 943 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 944 read_buf |= NET_IP_ALIGN << 9; 945 946 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 947 if (ret < 0) 948 return ret; 949 950 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 951 if (ret < 0) 952 return ret; 953 954 netif_dbg(dev, ifup, dev->net, 955 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 956 957 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 958 if (ret < 0) 959 return ret; 960 961 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 962 if (ret < 0) 963 return ret; 964 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 965 966 /* Configure GPIO pins as LED outputs */ 967 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 968 LED_GPIO_CFG_FDX_LED; 969 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 970 if (ret < 0) 971 return ret; 972 973 /* Init Tx */ 974 ret = smsc95xx_write_reg(dev, FLOW, 0); 975 if (ret < 0) 976 return ret; 977 978 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 979 if (ret < 0) 980 return ret; 981 982 /* Don't need mac_cr_lock during initialisation */ 983 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 984 if (ret < 0) 985 return ret; 986 987 /* Init Rx */ 988 /* Set Vlan */ 989 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 990 if (ret < 0) 991 return ret; 992 993 /* Enable or disable checksum offload engines */ 994 ret = smsc95xx_set_features(dev->net, dev->net->features); 995 if (ret < 0) { 996 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 997 return ret; 998 } 999 1000 smsc95xx_set_multicast(dev->net); 1001 1002 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1003 if (ret < 0) 1004 return ret; 1005 1006 /* enable PHY interrupts */ 1007 read_buf |= INT_EP_CTL_PHY_INT_; 1008 1009 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1010 if (ret < 0) 1011 return ret; 1012 1013 ret = smsc95xx_start_tx_path(dev); 1014 if (ret < 0) { 1015 netdev_warn(dev->net, "Failed to start TX path\n"); 1016 return ret; 1017 } 1018 1019 ret = smsc95xx_start_rx_path(dev); 1020 if (ret < 0) { 1021 netdev_warn(dev->net, "Failed to start RX path\n"); 1022 return ret; 1023 } 1024 1025 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1026 return 0; 1027 } 1028 1029 static const struct net_device_ops smsc95xx_netdev_ops = { 1030 .ndo_open = usbnet_open, 1031 .ndo_stop = usbnet_stop, 1032 .ndo_start_xmit = usbnet_start_xmit, 1033 .ndo_tx_timeout = usbnet_tx_timeout, 1034 .ndo_change_mtu = usbnet_change_mtu, 1035 .ndo_get_stats64 = dev_get_tstats64, 1036 .ndo_set_mac_address = eth_mac_addr, 1037 .ndo_validate_addr = eth_validate_addr, 1038 .ndo_eth_ioctl = smsc95xx_ioctl, 1039 .ndo_set_rx_mode = smsc95xx_set_multicast, 1040 .ndo_set_features = smsc95xx_set_features, 1041 }; 1042 1043 static void smsc95xx_handle_link_change(struct net_device *net) 1044 { 1045 struct usbnet *dev = netdev_priv(net); 1046 1047 phy_print_status(net->phydev); 1048 smsc95xx_mac_update_fullduplex(dev); 1049 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1050 } 1051 1052 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1053 { 1054 struct smsc95xx_priv *pdata; 1055 bool is_internal_phy; 1056 char usb_path[64]; 1057 int ret, phy_irq; 1058 u32 val; 1059 1060 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1061 1062 ret = usbnet_get_endpoints(dev, intf); 1063 if (ret < 0) { 1064 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1065 return ret; 1066 } 1067 1068 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1069 if (!pdata) 1070 return -ENOMEM; 1071 1072 dev->driver_priv = pdata; 1073 1074 spin_lock_init(&pdata->mac_cr_lock); 1075 1076 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1077 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1078 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1079 * it is transmitted as all ones. The zero transmitted checksum means 1080 * transmitter generated no checksum. Hence, enable csum offload only 1081 * for ipv4 packets. 1082 */ 1083 if (DEFAULT_TX_CSUM_ENABLE) 1084 dev->net->features |= NETIF_F_IP_CSUM; 1085 if (DEFAULT_RX_CSUM_ENABLE) 1086 dev->net->features |= NETIF_F_RXCSUM; 1087 1088 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1089 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1090 1091 smsc95xx_init_mac_address(dev); 1092 1093 /* Init all registers */ 1094 ret = smsc95xx_reset(dev); 1095 if (ret) 1096 goto free_pdata; 1097 1098 /* create irq domain for use by PHY driver and GPIO consumers */ 1099 usb_make_path(dev->udev, usb_path, sizeof(usb_path)); 1100 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path); 1101 if (!pdata->irqfwnode) { 1102 ret = -ENOMEM; 1103 goto free_pdata; 1104 } 1105 1106 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode, 1107 SMSC95XX_NR_IRQS, 1108 &irq_domain_simple_ops, 1109 pdata); 1110 if (!pdata->irqdomain) { 1111 ret = -ENOMEM; 1112 goto free_irqfwnode; 1113 } 1114 1115 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ); 1116 if (!phy_irq) { 1117 ret = -ENOENT; 1118 goto remove_irqdomain; 1119 } 1120 1121 pdata->irqchip = dummy_irq_chip; 1122 pdata->irqchip.name = SMSC_CHIPNAME; 1123 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip, 1124 handle_simple_irq, "phy"); 1125 1126 pdata->mdiobus = mdiobus_alloc(); 1127 if (!pdata->mdiobus) { 1128 ret = -ENOMEM; 1129 goto dispose_irq; 1130 } 1131 1132 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1133 if (ret < 0) 1134 goto free_mdio; 1135 1136 is_internal_phy = !(val & HW_CFG_PSEL_); 1137 if (is_internal_phy) 1138 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1139 1140 pdata->mdiobus->priv = dev; 1141 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1142 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1143 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1144 pdata->mdiobus->parent = &dev->udev->dev; 1145 1146 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1147 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1148 1149 ret = mdiobus_register(pdata->mdiobus); 1150 if (ret) { 1151 netdev_err(dev->net, "Could not register MDIO bus\n"); 1152 goto free_mdio; 1153 } 1154 1155 pdata->phydev = phy_find_first(pdata->mdiobus); 1156 if (!pdata->phydev) { 1157 netdev_err(dev->net, "no PHY found\n"); 1158 ret = -ENODEV; 1159 goto unregister_mdio; 1160 } 1161 1162 pdata->phydev->irq = phy_irq; 1163 pdata->phydev->is_internal = is_internal_phy; 1164 1165 /* detect device revision as different features may be available */ 1166 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1167 if (ret < 0) 1168 goto unregister_mdio; 1169 1170 val >>= 16; 1171 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1172 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1173 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1174 FEATURE_PHY_NLP_CROSSOVER | 1175 FEATURE_REMOTE_WAKEUP); 1176 else if (val == ID_REV_CHIP_ID_9512_) 1177 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1178 1179 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1180 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1181 dev->net->flags |= IFF_MULTICAST; 1182 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1183 dev->net->min_mtu = ETH_MIN_MTU; 1184 dev->net->max_mtu = ETH_DATA_LEN; 1185 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1186 1187 ret = phy_connect_direct(dev->net, pdata->phydev, 1188 &smsc95xx_handle_link_change, 1189 PHY_INTERFACE_MODE_MII); 1190 if (ret) { 1191 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1192 goto unregister_mdio; 1193 } 1194 1195 phy_attached_info(dev->net->phydev); 1196 1197 return 0; 1198 1199 unregister_mdio: 1200 mdiobus_unregister(pdata->mdiobus); 1201 1202 free_mdio: 1203 mdiobus_free(pdata->mdiobus); 1204 1205 dispose_irq: 1206 irq_dispose_mapping(phy_irq); 1207 1208 remove_irqdomain: 1209 irq_domain_remove(pdata->irqdomain); 1210 1211 free_irqfwnode: 1212 irq_domain_free_fwnode(pdata->irqfwnode); 1213 1214 free_pdata: 1215 kfree(pdata); 1216 return ret; 1217 } 1218 1219 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1220 { 1221 struct smsc95xx_priv *pdata = dev->driver_priv; 1222 1223 phy_disconnect(dev->net->phydev); 1224 mdiobus_unregister(pdata->mdiobus); 1225 mdiobus_free(pdata->mdiobus); 1226 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); 1227 irq_domain_remove(pdata->irqdomain); 1228 irq_domain_free_fwnode(pdata->irqfwnode); 1229 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1230 kfree(pdata); 1231 } 1232 1233 static int smsc95xx_start_phy(struct usbnet *dev) 1234 { 1235 phy_start(dev->net->phydev); 1236 1237 return 0; 1238 } 1239 1240 static int smsc95xx_stop(struct usbnet *dev) 1241 { 1242 phy_stop(dev->net->phydev); 1243 1244 return 0; 1245 } 1246 1247 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1248 { 1249 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1250 return crc << ((filter % 2) * 16); 1251 } 1252 1253 static int smsc95xx_link_ok(struct usbnet *dev) 1254 { 1255 struct smsc95xx_priv *pdata = dev->driver_priv; 1256 int ret; 1257 1258 /* first, a dummy read, needed to latch some MII phys */ 1259 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1260 if (ret < 0) 1261 return ret; 1262 1263 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1264 if (ret < 0) 1265 return ret; 1266 1267 return !!(ret & BMSR_LSTATUS); 1268 } 1269 1270 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1271 { 1272 struct smsc95xx_priv *pdata = dev->driver_priv; 1273 u32 val; 1274 int ret; 1275 1276 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1277 if (ret < 0) 1278 return ret; 1279 1280 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1281 val |= PM_CTL_SUS_MODE_0; 1282 1283 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1284 if (ret < 0) 1285 return ret; 1286 1287 /* clear wol status */ 1288 val &= ~PM_CTL_WUPS_; 1289 val |= PM_CTL_WUPS_WOL_; 1290 1291 /* enable energy detection */ 1292 if (pdata->wolopts & WAKE_PHY) 1293 val |= PM_CTL_WUPS_ED_; 1294 1295 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1296 if (ret < 0) 1297 return ret; 1298 1299 /* read back PM_CTRL */ 1300 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1301 if (ret < 0) 1302 return ret; 1303 1304 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1305 1306 return 0; 1307 } 1308 1309 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1310 { 1311 struct smsc95xx_priv *pdata = dev->driver_priv; 1312 int ret, phy_id = pdata->phydev->mdio.addr; 1313 u32 val; 1314 1315 /* reconfigure link pulse detection timing for 1316 * compatibility with non-standard link partners 1317 */ 1318 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1319 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, 1320 PHY_EDPD_CONFIG_DEFAULT); 1321 1322 /* enable energy detect power-down mode */ 1323 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); 1324 if (ret < 0) 1325 return ret; 1326 1327 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1328 1329 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret); 1330 1331 /* enter SUSPEND1 mode */ 1332 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1333 if (ret < 0) 1334 return ret; 1335 1336 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1337 val |= PM_CTL_SUS_MODE_1; 1338 1339 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1340 if (ret < 0) 1341 return ret; 1342 1343 /* clear wol status, enable energy detection */ 1344 val &= ~PM_CTL_WUPS_; 1345 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1346 1347 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1348 if (ret < 0) 1349 return ret; 1350 1351 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1352 1353 return 0; 1354 } 1355 1356 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1357 { 1358 struct smsc95xx_priv *pdata = dev->driver_priv; 1359 u32 val; 1360 int ret; 1361 1362 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1363 if (ret < 0) 1364 return ret; 1365 1366 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1367 val |= PM_CTL_SUS_MODE_2; 1368 1369 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1370 if (ret < 0) 1371 return ret; 1372 1373 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1374 1375 return 0; 1376 } 1377 1378 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1379 { 1380 struct smsc95xx_priv *pdata = dev->driver_priv; 1381 u32 val; 1382 int ret; 1383 1384 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val); 1385 if (ret < 0) 1386 return ret; 1387 1388 if (val & RX_FIFO_INF_USED_) { 1389 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1390 return -EBUSY; 1391 } 1392 1393 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1394 if (ret < 0) 1395 return ret; 1396 1397 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1398 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1399 1400 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1401 if (ret < 0) 1402 return ret; 1403 1404 /* clear wol status */ 1405 val &= ~PM_CTL_WUPS_; 1406 val |= PM_CTL_WUPS_WOL_; 1407 1408 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1409 if (ret < 0) 1410 return ret; 1411 1412 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1413 1414 return 0; 1415 } 1416 1417 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1418 { 1419 struct smsc95xx_priv *pdata = dev->driver_priv; 1420 1421 if (!netif_running(dev->net)) { 1422 /* interface is ifconfig down so fully power down hw */ 1423 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1424 return smsc95xx_enter_suspend2(dev); 1425 } 1426 1427 if (!link_up) { 1428 /* link is down so enter EDPD mode, but only if device can 1429 * reliably resume from it. This check should be redundant 1430 * as current FEATURE_REMOTE_WAKEUP parts also support 1431 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1432 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1433 netdev_warn(dev->net, "EDPD not supported\n"); 1434 return -EBUSY; 1435 } 1436 1437 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1438 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1439 return smsc95xx_enter_suspend1(dev); 1440 } 1441 1442 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1443 return smsc95xx_enter_suspend3(dev); 1444 } 1445 1446 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1447 { 1448 struct usbnet *dev = usb_get_intfdata(intf); 1449 struct smsc95xx_priv *pdata = dev->driver_priv; 1450 u32 val, link_up; 1451 int ret; 1452 1453 pdata->pm_task = current; 1454 1455 ret = usbnet_suspend(intf, message); 1456 if (ret < 0) { 1457 netdev_warn(dev->net, "usbnet_suspend error\n"); 1458 pdata->pm_task = NULL; 1459 return ret; 1460 } 1461 1462 if (pdata->suspend_flags) { 1463 netdev_warn(dev->net, "error during last resume\n"); 1464 pdata->suspend_flags = 0; 1465 } 1466 1467 link_up = smsc95xx_link_ok(dev); 1468 1469 if (message.event == PM_EVENT_AUTO_SUSPEND && 1470 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1471 ret = smsc95xx_autosuspend(dev, link_up); 1472 goto done; 1473 } 1474 1475 /* if we get this far we're not autosuspending */ 1476 /* if no wol options set, or if link is down and we're not waking on 1477 * PHY activity, enter lowest power SUSPEND2 mode 1478 */ 1479 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1480 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1481 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1482 1483 /* disable energy detect (link up) & wake up events */ 1484 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1485 if (ret < 0) 1486 goto done; 1487 1488 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1489 1490 ret = smsc95xx_write_reg(dev, WUCSR, val); 1491 if (ret < 0) 1492 goto done; 1493 1494 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1495 if (ret < 0) 1496 goto done; 1497 1498 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1499 1500 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1501 if (ret < 0) 1502 goto done; 1503 1504 ret = smsc95xx_enter_suspend2(dev); 1505 goto done; 1506 } 1507 1508 if (pdata->wolopts & WAKE_PHY) { 1509 /* if link is down then configure EDPD and enter SUSPEND1, 1510 * otherwise enter SUSPEND0 below 1511 */ 1512 if (!link_up) { 1513 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1514 ret = smsc95xx_enter_suspend1(dev); 1515 goto done; 1516 } 1517 } 1518 1519 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1520 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1521 u32 command[2]; 1522 u32 offset[2]; 1523 u32 crc[4]; 1524 int wuff_filter_count = 1525 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1526 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1527 int i, filter = 0; 1528 1529 if (!filter_mask) { 1530 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1531 ret = -ENOMEM; 1532 goto done; 1533 } 1534 1535 memset(command, 0, sizeof(command)); 1536 memset(offset, 0, sizeof(offset)); 1537 memset(crc, 0, sizeof(crc)); 1538 1539 if (pdata->wolopts & WAKE_BCAST) { 1540 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1541 netdev_info(dev->net, "enabling broadcast detection\n"); 1542 filter_mask[filter * 4] = 0x003F; 1543 filter_mask[filter * 4 + 1] = 0x00; 1544 filter_mask[filter * 4 + 2] = 0x00; 1545 filter_mask[filter * 4 + 3] = 0x00; 1546 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1547 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1548 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1549 filter++; 1550 } 1551 1552 if (pdata->wolopts & WAKE_MCAST) { 1553 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1554 netdev_info(dev->net, "enabling multicast detection\n"); 1555 filter_mask[filter * 4] = 0x0007; 1556 filter_mask[filter * 4 + 1] = 0x00; 1557 filter_mask[filter * 4 + 2] = 0x00; 1558 filter_mask[filter * 4 + 3] = 0x00; 1559 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1560 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1561 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1562 filter++; 1563 } 1564 1565 if (pdata->wolopts & WAKE_ARP) { 1566 const u8 arp[] = {0x08, 0x06}; 1567 netdev_info(dev->net, "enabling ARP detection\n"); 1568 filter_mask[filter * 4] = 0x0003; 1569 filter_mask[filter * 4 + 1] = 0x00; 1570 filter_mask[filter * 4 + 2] = 0x00; 1571 filter_mask[filter * 4 + 3] = 0x00; 1572 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1573 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1574 crc[filter/2] |= smsc_crc(arp, 2, filter); 1575 filter++; 1576 } 1577 1578 if (pdata->wolopts & WAKE_UCAST) { 1579 netdev_info(dev->net, "enabling unicast detection\n"); 1580 filter_mask[filter * 4] = 0x003F; 1581 filter_mask[filter * 4 + 1] = 0x00; 1582 filter_mask[filter * 4 + 2] = 0x00; 1583 filter_mask[filter * 4 + 3] = 0x00; 1584 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1585 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1586 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1587 filter++; 1588 } 1589 1590 for (i = 0; i < (wuff_filter_count * 4); i++) { 1591 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]); 1592 if (ret < 0) { 1593 kfree(filter_mask); 1594 goto done; 1595 } 1596 } 1597 kfree(filter_mask); 1598 1599 for (i = 0; i < (wuff_filter_count / 4); i++) { 1600 ret = smsc95xx_write_reg(dev, WUFF, command[i]); 1601 if (ret < 0) 1602 goto done; 1603 } 1604 1605 for (i = 0; i < (wuff_filter_count / 4); i++) { 1606 ret = smsc95xx_write_reg(dev, WUFF, offset[i]); 1607 if (ret < 0) 1608 goto done; 1609 } 1610 1611 for (i = 0; i < (wuff_filter_count / 2); i++) { 1612 ret = smsc95xx_write_reg(dev, WUFF, crc[i]); 1613 if (ret < 0) 1614 goto done; 1615 } 1616 1617 /* clear any pending pattern match packet status */ 1618 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1619 if (ret < 0) 1620 goto done; 1621 1622 val |= WUCSR_WUFR_; 1623 1624 ret = smsc95xx_write_reg(dev, WUCSR, val); 1625 if (ret < 0) 1626 goto done; 1627 } 1628 1629 if (pdata->wolopts & WAKE_MAGIC) { 1630 /* clear any pending magic packet status */ 1631 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1632 if (ret < 0) 1633 goto done; 1634 1635 val |= WUCSR_MPR_; 1636 1637 ret = smsc95xx_write_reg(dev, WUCSR, val); 1638 if (ret < 0) 1639 goto done; 1640 } 1641 1642 /* enable/disable wakeup sources */ 1643 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1644 if (ret < 0) 1645 goto done; 1646 1647 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1648 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1649 val |= WUCSR_WAKE_EN_; 1650 } else { 1651 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1652 val &= ~WUCSR_WAKE_EN_; 1653 } 1654 1655 if (pdata->wolopts & WAKE_MAGIC) { 1656 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1657 val |= WUCSR_MPEN_; 1658 } else { 1659 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1660 val &= ~WUCSR_MPEN_; 1661 } 1662 1663 ret = smsc95xx_write_reg(dev, WUCSR, val); 1664 if (ret < 0) 1665 goto done; 1666 1667 /* enable wol wakeup source */ 1668 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1669 if (ret < 0) 1670 goto done; 1671 1672 val |= PM_CTL_WOL_EN_; 1673 1674 /* phy energy detect wakeup source */ 1675 if (pdata->wolopts & WAKE_PHY) 1676 val |= PM_CTL_ED_EN_; 1677 1678 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1679 if (ret < 0) 1680 goto done; 1681 1682 /* enable receiver to enable frame reception */ 1683 smsc95xx_start_rx_path(dev); 1684 1685 /* some wol options are enabled, so enter SUSPEND0 */ 1686 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1687 ret = smsc95xx_enter_suspend0(dev); 1688 1689 done: 1690 /* 1691 * TODO: resume() might need to handle the suspend failure 1692 * in system sleep 1693 */ 1694 if (ret && PMSG_IS_AUTO(message)) 1695 usbnet_resume(intf); 1696 1697 pdata->pm_task = NULL; 1698 return ret; 1699 } 1700 1701 static int smsc95xx_resume(struct usb_interface *intf) 1702 { 1703 struct usbnet *dev = usb_get_intfdata(intf); 1704 struct smsc95xx_priv *pdata; 1705 u8 suspend_flags; 1706 int ret; 1707 u32 val; 1708 1709 BUG_ON(!dev); 1710 pdata = dev->driver_priv; 1711 suspend_flags = pdata->suspend_flags; 1712 1713 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1714 1715 /* do this first to ensure it's cleared even in error case */ 1716 pdata->suspend_flags = 0; 1717 1718 pdata->pm_task = current; 1719 1720 if (suspend_flags & SUSPEND_ALLMODES) { 1721 /* clear wake-up sources */ 1722 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1723 if (ret < 0) 1724 goto done; 1725 1726 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1727 1728 ret = smsc95xx_write_reg(dev, WUCSR, val); 1729 if (ret < 0) 1730 goto done; 1731 1732 /* clear wake-up status */ 1733 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1734 if (ret < 0) 1735 goto done; 1736 1737 val &= ~PM_CTL_WOL_EN_; 1738 val |= PM_CTL_WUPS_; 1739 1740 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1741 if (ret < 0) 1742 goto done; 1743 } 1744 1745 phy_init_hw(pdata->phydev); 1746 1747 ret = usbnet_resume(intf); 1748 if (ret < 0) 1749 netdev_warn(dev->net, "usbnet_resume error\n"); 1750 1751 done: 1752 pdata->pm_task = NULL; 1753 return ret; 1754 } 1755 1756 static int smsc95xx_reset_resume(struct usb_interface *intf) 1757 { 1758 struct usbnet *dev = usb_get_intfdata(intf); 1759 struct smsc95xx_priv *pdata = dev->driver_priv; 1760 int ret; 1761 1762 pdata->pm_task = current; 1763 ret = smsc95xx_reset(dev); 1764 pdata->pm_task = NULL; 1765 if (ret < 0) 1766 return ret; 1767 1768 return smsc95xx_resume(intf); 1769 } 1770 1771 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1772 { 1773 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1774 skb->ip_summed = CHECKSUM_COMPLETE; 1775 skb_trim(skb, skb->len - 2); 1776 } 1777 1778 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1779 { 1780 /* This check is no longer done by usbnet */ 1781 if (skb->len < dev->net->hard_header_len) 1782 return 0; 1783 1784 while (skb->len > 0) { 1785 u32 header, align_count; 1786 struct sk_buff *ax_skb; 1787 unsigned char *packet; 1788 u16 size; 1789 1790 header = get_unaligned_le32(skb->data); 1791 skb_pull(skb, 4 + NET_IP_ALIGN); 1792 packet = skb->data; 1793 1794 /* get the packet length */ 1795 size = (u16)((header & RX_STS_FL_) >> 16); 1796 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1797 1798 if (unlikely(header & RX_STS_ES_)) { 1799 netif_dbg(dev, rx_err, dev->net, 1800 "Error header=0x%08x\n", header); 1801 dev->net->stats.rx_errors++; 1802 dev->net->stats.rx_dropped++; 1803 1804 if (header & RX_STS_CRC_) { 1805 dev->net->stats.rx_crc_errors++; 1806 } else { 1807 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1808 dev->net->stats.rx_frame_errors++; 1809 1810 if ((header & RX_STS_LE_) && 1811 (!(header & RX_STS_FT_))) 1812 dev->net->stats.rx_length_errors++; 1813 } 1814 } else { 1815 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1816 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1817 netif_dbg(dev, rx_err, dev->net, 1818 "size err header=0x%08x\n", header); 1819 return 0; 1820 } 1821 1822 /* last frame in this batch */ 1823 if (skb->len == size) { 1824 if (dev->net->features & NETIF_F_RXCSUM) 1825 smsc95xx_rx_csum_offload(skb); 1826 skb_trim(skb, skb->len - 4); /* remove fcs */ 1827 skb->truesize = size + sizeof(struct sk_buff); 1828 1829 return 1; 1830 } 1831 1832 ax_skb = skb_clone(skb, GFP_ATOMIC); 1833 if (unlikely(!ax_skb)) { 1834 netdev_warn(dev->net, "Error allocating skb\n"); 1835 return 0; 1836 } 1837 1838 ax_skb->len = size; 1839 ax_skb->data = packet; 1840 skb_set_tail_pointer(ax_skb, size); 1841 1842 if (dev->net->features & NETIF_F_RXCSUM) 1843 smsc95xx_rx_csum_offload(ax_skb); 1844 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1845 ax_skb->truesize = size + sizeof(struct sk_buff); 1846 1847 usbnet_skb_return(dev, ax_skb); 1848 } 1849 1850 skb_pull(skb, size); 1851 1852 /* padding bytes before the next frame starts */ 1853 if (skb->len) 1854 skb_pull(skb, align_count); 1855 } 1856 1857 return 1; 1858 } 1859 1860 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1861 { 1862 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1863 u16 high_16 = low_16 + skb->csum_offset; 1864 return (high_16 << 16) | low_16; 1865 } 1866 1867 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1868 * transmission. This is fairly unlikely, only seems to trigger with some 1869 * short TCP ACK packets sent. 1870 * 1871 * Note, this calculation should probably check for the alignment of the 1872 * data as well, but a straight check for csum being in the last four bytes 1873 * of the packet should be ok for now. 1874 */ 1875 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1876 { 1877 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1878 1879 if (skb->len <= 45) 1880 return false; 1881 return skb->csum_offset < (len - (4 + 1)); 1882 } 1883 1884 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1885 struct sk_buff *skb, gfp_t flags) 1886 { 1887 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1888 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1889 u32 tx_cmd_a, tx_cmd_b; 1890 void *ptr; 1891 1892 /* We do not advertise SG, so skbs should be already linearized */ 1893 BUG_ON(skb_shinfo(skb)->nr_frags); 1894 1895 /* Make writable and expand header space by overhead if required */ 1896 if (skb_cow_head(skb, overhead)) { 1897 /* Must deallocate here as returning NULL to indicate error 1898 * means the skb won't be deallocated in the caller. 1899 */ 1900 dev_kfree_skb_any(skb); 1901 return NULL; 1902 } 1903 1904 tx_cmd_b = (u32)skb->len; 1905 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1906 1907 if (csum) { 1908 if (!smsc95xx_can_tx_checksum(skb)) { 1909 /* workaround - hardware tx checksum does not work 1910 * properly with extremely small packets */ 1911 long csstart = skb_checksum_start_offset(skb); 1912 __wsum calc = csum_partial(skb->data + csstart, 1913 skb->len - csstart, 0); 1914 *((__sum16 *)(skb->data + csstart 1915 + skb->csum_offset)) = csum_fold(calc); 1916 1917 csum = false; 1918 } else { 1919 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1920 ptr = skb_push(skb, 4); 1921 put_unaligned_le32(csum_preamble, ptr); 1922 1923 tx_cmd_a += 4; 1924 tx_cmd_b += 4; 1925 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1926 } 1927 } 1928 1929 ptr = skb_push(skb, 8); 1930 put_unaligned_le32(tx_cmd_a, ptr); 1931 put_unaligned_le32(tx_cmd_b, ptr+4); 1932 1933 return skb; 1934 } 1935 1936 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1937 { 1938 struct smsc95xx_priv *pdata = dev->driver_priv; 1939 1940 dev->intf->needs_remote_wakeup = on; 1941 1942 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1943 return 0; 1944 1945 /* this chip revision isn't capable of remote wakeup */ 1946 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1947 1948 if (on) 1949 usb_autopm_get_interface_no_resume(dev->intf); 1950 else 1951 usb_autopm_put_interface(dev->intf); 1952 1953 return 0; 1954 } 1955 1956 static const struct driver_info smsc95xx_info = { 1957 .description = "smsc95xx USB 2.0 Ethernet", 1958 .bind = smsc95xx_bind, 1959 .unbind = smsc95xx_unbind, 1960 .reset = smsc95xx_reset, 1961 .check_connect = smsc95xx_start_phy, 1962 .stop = smsc95xx_stop, 1963 .rx_fixup = smsc95xx_rx_fixup, 1964 .tx_fixup = smsc95xx_tx_fixup, 1965 .status = smsc95xx_status, 1966 .manage_power = smsc95xx_manage_power, 1967 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 1968 }; 1969 1970 static const struct usb_device_id products[] = { 1971 { 1972 /* SMSC9500 USB Ethernet Device */ 1973 USB_DEVICE(0x0424, 0x9500), 1974 .driver_info = (unsigned long) &smsc95xx_info, 1975 }, 1976 { 1977 /* SMSC9505 USB Ethernet Device */ 1978 USB_DEVICE(0x0424, 0x9505), 1979 .driver_info = (unsigned long) &smsc95xx_info, 1980 }, 1981 { 1982 /* SMSC9500A USB Ethernet Device */ 1983 USB_DEVICE(0x0424, 0x9E00), 1984 .driver_info = (unsigned long) &smsc95xx_info, 1985 }, 1986 { 1987 /* SMSC9505A USB Ethernet Device */ 1988 USB_DEVICE(0x0424, 0x9E01), 1989 .driver_info = (unsigned long) &smsc95xx_info, 1990 }, 1991 { 1992 /* SMSC9512/9514 USB Hub & Ethernet Device */ 1993 USB_DEVICE(0x0424, 0xec00), 1994 .driver_info = (unsigned long) &smsc95xx_info, 1995 }, 1996 { 1997 /* SMSC9500 USB Ethernet Device (SAL10) */ 1998 USB_DEVICE(0x0424, 0x9900), 1999 .driver_info = (unsigned long) &smsc95xx_info, 2000 }, 2001 { 2002 /* SMSC9505 USB Ethernet Device (SAL10) */ 2003 USB_DEVICE(0x0424, 0x9901), 2004 .driver_info = (unsigned long) &smsc95xx_info, 2005 }, 2006 { 2007 /* SMSC9500A USB Ethernet Device (SAL10) */ 2008 USB_DEVICE(0x0424, 0x9902), 2009 .driver_info = (unsigned long) &smsc95xx_info, 2010 }, 2011 { 2012 /* SMSC9505A USB Ethernet Device (SAL10) */ 2013 USB_DEVICE(0x0424, 0x9903), 2014 .driver_info = (unsigned long) &smsc95xx_info, 2015 }, 2016 { 2017 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2018 USB_DEVICE(0x0424, 0x9904), 2019 .driver_info = (unsigned long) &smsc95xx_info, 2020 }, 2021 { 2022 /* SMSC9500A USB Ethernet Device (HAL) */ 2023 USB_DEVICE(0x0424, 0x9905), 2024 .driver_info = (unsigned long) &smsc95xx_info, 2025 }, 2026 { 2027 /* SMSC9505A USB Ethernet Device (HAL) */ 2028 USB_DEVICE(0x0424, 0x9906), 2029 .driver_info = (unsigned long) &smsc95xx_info, 2030 }, 2031 { 2032 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2033 USB_DEVICE(0x0424, 0x9907), 2034 .driver_info = (unsigned long) &smsc95xx_info, 2035 }, 2036 { 2037 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2038 USB_DEVICE(0x0424, 0x9908), 2039 .driver_info = (unsigned long) &smsc95xx_info, 2040 }, 2041 { 2042 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2043 USB_DEVICE(0x0424, 0x9909), 2044 .driver_info = (unsigned long) &smsc95xx_info, 2045 }, 2046 { 2047 /* SMSC LAN9530 USB Ethernet Device */ 2048 USB_DEVICE(0x0424, 0x9530), 2049 .driver_info = (unsigned long) &smsc95xx_info, 2050 }, 2051 { 2052 /* SMSC LAN9730 USB Ethernet Device */ 2053 USB_DEVICE(0x0424, 0x9730), 2054 .driver_info = (unsigned long) &smsc95xx_info, 2055 }, 2056 { 2057 /* SMSC LAN89530 USB Ethernet Device */ 2058 USB_DEVICE(0x0424, 0x9E08), 2059 .driver_info = (unsigned long) &smsc95xx_info, 2060 }, 2061 { 2062 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ 2063 USB_DEVICE(0x184F, 0x0051), 2064 .driver_info = (unsigned long)&smsc95xx_info, 2065 }, 2066 { }, /* END */ 2067 }; 2068 MODULE_DEVICE_TABLE(usb, products); 2069 2070 static struct usb_driver smsc95xx_driver = { 2071 .name = "smsc95xx", 2072 .id_table = products, 2073 .probe = usbnet_probe, 2074 .suspend = smsc95xx_suspend, 2075 .resume = smsc95xx_resume, 2076 .reset_resume = smsc95xx_reset_resume, 2077 .disconnect = usbnet_disconnect, 2078 .disable_hub_initiated_lpm = 1, 2079 .supports_autosuspend = 1, 2080 }; 2081 2082 module_usb_driver(smsc95xx_driver); 2083 2084 MODULE_AUTHOR("Nancy Lin"); 2085 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2086 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2087 MODULE_LICENSE("GPL"); 2088