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 61struct 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 bool is_internal_phy; 70 struct irq_chip irqchip; 71 struct irq_domain *irqdomain; 72 struct fwnode_handle *irqfwnode; 73 struct mii_bus *mdiobus; 74 struct phy_device *phydev; 75 struct task_struct *pm_task; 76}; 77 78static bool turbo_mode = true; 79module_param(turbo_mode, bool, 0644); 80MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 81 82static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 83 u32 *data) 84{ 85 struct smsc95xx_priv *pdata = dev->driver_priv; 86 u32 buf; 87 int ret; 88 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 89 90 if (current != pdata->pm_task) 91 fn = usbnet_read_cmd; 92 else 93 fn = usbnet_read_cmd_nopm; 94 95 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 96 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 97 0, index, &buf, 4); 98 if (ret < 4) { 99 ret = ret < 0 ? ret : -ENODATA; 100 101 if (ret != -ENODEV) 102 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 103 index, ret); 104 return ret; 105 } 106 107 le32_to_cpus(&buf); 108 *data = buf; 109 110 return ret; 111} 112 113static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 114 u32 data) 115{ 116 struct smsc95xx_priv *pdata = dev->driver_priv; 117 u32 buf; 118 int ret; 119 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 120 121 if (current != pdata->pm_task) 122 fn = usbnet_write_cmd; 123 else 124 fn = usbnet_write_cmd_nopm; 125 126 buf = data; 127 cpu_to_le32s(&buf); 128 129 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 130 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 131 0, index, &buf, 4); 132 if (ret < 0 && ret != -ENODEV) 133 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 134 index, ret); 135 136 return ret; 137} 138 139/* Loop until the read is completed with timeout 140 * called with phy_mutex held */ 141static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) 142{ 143 unsigned long start_time = jiffies; 144 u32 val; 145 int ret; 146 147 do { 148 ret = smsc95xx_read_reg(dev, MII_ADDR, &val); 149 if (ret < 0) { 150 /* Ignore -ENODEV error during disconnect() */ 151 if (ret == -ENODEV) 152 return 0; 153 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 154 return ret; 155 } 156 157 if (!(val & MII_BUSY_)) 158 return 0; 159 } while (!time_after(jiffies, start_time + HZ)); 160 161 return -EIO; 162} 163 164static u32 mii_address_cmd(int phy_id, int idx, u16 op) 165{ 166 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 167} 168 169static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx) 170{ 171 u32 val, addr; 172 int ret; 173 174 mutex_lock(&dev->phy_mutex); 175 176 /* confirm MII not busy */ 177 ret = smsc95xx_phy_wait_not_busy(dev); 178 if (ret < 0) { 179 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 180 goto done; 181 } 182 183 /* set the address, index & direction (read from PHY) */ 184 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 185 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 186 if (ret < 0) { 187 if (ret != -ENODEV) 188 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 189 goto done; 190 } 191 192 ret = smsc95xx_phy_wait_not_busy(dev); 193 if (ret < 0) { 194 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 195 goto done; 196 } 197 198 ret = smsc95xx_read_reg(dev, MII_DATA, &val); 199 if (ret < 0) { 200 if (ret != -ENODEV) 201 netdev_warn(dev->net, "Error reading MII_DATA\n"); 202 goto done; 203 } 204 205 ret = (u16)(val & 0xFFFF); 206 207done: 208 mutex_unlock(&dev->phy_mutex); 209 210 /* Ignore -ENODEV error during disconnect() */ 211 if (ret == -ENODEV) 212 return 0; 213 return ret; 214} 215 216static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx, 217 int regval) 218{ 219 u32 val, addr; 220 int ret; 221 222 mutex_lock(&dev->phy_mutex); 223 224 /* confirm MII not busy */ 225 ret = smsc95xx_phy_wait_not_busy(dev); 226 if (ret < 0) { 227 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 228 goto done; 229 } 230 231 val = regval; 232 ret = smsc95xx_write_reg(dev, MII_DATA, val); 233 if (ret < 0) { 234 if (ret != -ENODEV) 235 netdev_warn(dev->net, "Error writing MII_DATA\n"); 236 goto done; 237 } 238 239 /* set the address, index & direction (write to PHY) */ 240 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 241 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 242 if (ret < 0) { 243 if (ret != -ENODEV) 244 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 245 goto done; 246 } 247 248 ret = smsc95xx_phy_wait_not_busy(dev); 249 if (ret < 0) { 250 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 251 goto done; 252 } 253 254done: 255 mutex_unlock(&dev->phy_mutex); 256} 257 258static int smsc95xx_mdiobus_reset(struct mii_bus *bus) 259{ 260 struct smsc95xx_priv *pdata; 261 struct usbnet *dev; 262 u32 val; 263 int ret; 264 265 dev = bus->priv; 266 pdata = dev->driver_priv; 267 268 if (pdata->is_internal_phy) 269 return 0; 270 271 mutex_lock(&dev->phy_mutex); 272 273 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 274 if (ret < 0) 275 goto reset_out; 276 277 val |= PM_CTL_PHY_RST_; 278 279 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 280 if (ret < 0) 281 goto reset_out; 282 283 /* Driver has no knowledge at this point about the external PHY. 284 * The 802.3 specifies that the reset process shall 285 * be completed within 0.5 s. 286 */ 287 fsleep(500000); 288 289reset_out: 290 mutex_unlock(&dev->phy_mutex); 291 292 return 0; 293} 294 295static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 296{ 297 struct usbnet *dev = bus->priv; 298 299 return smsc95xx_mdio_read(dev, phy_id, idx); 300} 301 302static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 303 u16 regval) 304{ 305 struct usbnet *dev = bus->priv; 306 307 smsc95xx_mdio_write(dev, phy_id, idx, regval); 308 return 0; 309} 310 311static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 312{ 313 unsigned long start_time = jiffies; 314 u32 val; 315 int ret; 316 317 do { 318 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 319 if (ret < 0) { 320 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 321 return ret; 322 } 323 324 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 325 break; 326 udelay(40); 327 } while (!time_after(jiffies, start_time + HZ)); 328 329 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 330 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 331 return -EIO; 332 } 333 334 return 0; 335} 336 337static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 338{ 339 unsigned long start_time = jiffies; 340 u32 val; 341 int ret; 342 343 do { 344 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 345 if (ret < 0) { 346 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 347 return ret; 348 } 349 350 if (!(val & E2P_CMD_BUSY_)) 351 return 0; 352 353 udelay(40); 354 } while (!time_after(jiffies, start_time + HZ)); 355 356 netdev_warn(dev->net, "EEPROM is busy\n"); 357 return -EIO; 358} 359 360static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 361 u8 *data) 362{ 363 u32 val; 364 int i, ret; 365 366 BUG_ON(!dev); 367 BUG_ON(!data); 368 369 ret = smsc95xx_eeprom_confirm_not_busy(dev); 370 if (ret) 371 return ret; 372 373 for (i = 0; i < length; i++) { 374 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 375 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 376 if (ret < 0) { 377 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 378 return ret; 379 } 380 381 ret = smsc95xx_wait_eeprom(dev); 382 if (ret < 0) 383 return ret; 384 385 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 386 if (ret < 0) { 387 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 388 return ret; 389 } 390 391 data[i] = val & 0xFF; 392 offset++; 393 } 394 395 return 0; 396} 397 398static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 399 u8 *data) 400{ 401 u32 val; 402 int i, ret; 403 404 BUG_ON(!dev); 405 BUG_ON(!data); 406 407 ret = smsc95xx_eeprom_confirm_not_busy(dev); 408 if (ret) 409 return ret; 410 411 /* Issue write/erase enable command */ 412 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 413 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 414 if (ret < 0) { 415 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 416 return ret; 417 } 418 419 ret = smsc95xx_wait_eeprom(dev); 420 if (ret < 0) 421 return ret; 422 423 for (i = 0; i < length; i++) { 424 425 /* Fill data register */ 426 val = data[i]; 427 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 428 if (ret < 0) { 429 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 430 return ret; 431 } 432 433 /* Send "write" command */ 434 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 435 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 436 if (ret < 0) { 437 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 438 return ret; 439 } 440 441 ret = smsc95xx_wait_eeprom(dev); 442 if (ret < 0) 443 return ret; 444 445 offset++; 446 } 447 448 return 0; 449} 450 451static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 452 u32 data) 453{ 454 const u16 size = 4; 455 u32 buf; 456 int ret; 457 458 buf = data; 459 cpu_to_le32s(&buf); 460 461 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 462 USB_DIR_OUT | USB_TYPE_VENDOR | 463 USB_RECIP_DEVICE, 464 0, index, &buf, size); 465 if (ret < 0) 466 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 467 ret); 468 return ret; 469} 470 471/* returns hash bit number for given MAC address 472 * example: 473 * 01 00 5E 00 00 01 -> returns bit number 31 */ 474static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 475{ 476 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 477} 478 479static void smsc95xx_set_multicast(struct net_device *netdev) 480{ 481 struct usbnet *dev = netdev_priv(netdev); 482 struct smsc95xx_priv *pdata = dev->driver_priv; 483 unsigned long flags; 484 int ret; 485 486 pdata->hash_hi = 0; 487 pdata->hash_lo = 0; 488 489 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 490 491 if (dev->net->flags & IFF_PROMISC) { 492 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 493 pdata->mac_cr |= MAC_CR_PRMS_; 494 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 495 } else if (dev->net->flags & IFF_ALLMULTI) { 496 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 497 pdata->mac_cr |= MAC_CR_MCPAS_; 498 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 499 } else if (!netdev_mc_empty(dev->net)) { 500 struct netdev_hw_addr *ha; 501 502 pdata->mac_cr |= MAC_CR_HPFILT_; 503 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 504 505 netdev_for_each_mc_addr(ha, netdev) { 506 u32 bitnum = smsc95xx_hash(ha->addr); 507 u32 mask = 0x01 << (bitnum & 0x1F); 508 if (bitnum & 0x20) 509 pdata->hash_hi |= mask; 510 else 511 pdata->hash_lo |= mask; 512 } 513 514 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 515 pdata->hash_hi, pdata->hash_lo); 516 } else { 517 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 518 pdata->mac_cr &= 519 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 520 } 521 522 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 523 524 /* Initiate async writes, as we can't wait for completion here */ 525 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 526 if (ret < 0) 527 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 528 529 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 530 if (ret < 0) 531 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 532 533 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 534 if (ret < 0) 535 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 536} 537 538static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 539{ 540 u32 flow = 0, afc_cfg; 541 struct smsc95xx_priv *pdata = dev->driver_priv; 542 bool tx_pause, rx_pause; 543 544 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 545 if (ret < 0) 546 return ret; 547 548 if (pdata->phydev->duplex == DUPLEX_FULL) { 549 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 550 551 if (rx_pause) 552 flow = 0xFFFF0002; 553 554 if (tx_pause) { 555 afc_cfg |= 0xF; 556 flow |= 0xFFFF0000; 557 } else { 558 afc_cfg &= ~0xF; 559 } 560 561 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 562 rx_pause ? "enabled" : "disabled", 563 tx_pause ? "enabled" : "disabled"); 564 } else { 565 netif_dbg(dev, link, dev->net, "half duplex\n"); 566 afc_cfg |= 0xF; 567 } 568 569 ret = smsc95xx_write_reg(dev, FLOW, flow); 570 if (ret < 0) 571 return ret; 572 573 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 574} 575 576static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) 577{ 578 struct smsc95xx_priv *pdata = dev->driver_priv; 579 unsigned long flags; 580 int ret; 581 582 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 583 if (pdata->phydev->duplex != DUPLEX_FULL) { 584 pdata->mac_cr &= ~MAC_CR_FDPX_; 585 pdata->mac_cr |= MAC_CR_RCVOWN_; 586 } else { 587 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 588 pdata->mac_cr |= MAC_CR_FDPX_; 589 } 590 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 591 592 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 593 if (ret < 0) { 594 if (ret != -ENODEV) 595 netdev_warn(dev->net, 596 "Error updating MAC full duplex mode\n"); 597 return; 598 } 599 600 ret = smsc95xx_phy_update_flowcontrol(dev); 601 if (ret < 0) 602 netdev_warn(dev->net, "Error updating PHY flow control\n"); 603} 604 605static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 606{ 607 struct smsc95xx_priv *pdata = dev->driver_priv; 608 unsigned long flags; 609 u32 intdata; 610 611 if (urb->actual_length != 4) { 612 netdev_warn(dev->net, "unexpected urb length %d\n", 613 urb->actual_length); 614 return; 615 } 616 617 intdata = get_unaligned_le32(urb->transfer_buffer); 618 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 619 620 local_irq_save(flags); 621 622 if (intdata & INT_ENP_PHY_INT_) 623 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ); 624 else 625 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 626 intdata); 627 628 local_irq_restore(flags); 629} 630 631/* Enable or disable Tx & Rx checksum offload engines */ 632static int smsc95xx_set_features(struct net_device *netdev, 633 netdev_features_t features) 634{ 635 struct usbnet *dev = netdev_priv(netdev); 636 u32 read_buf; 637 int ret; 638 639 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 640 if (ret < 0) 641 return ret; 642 643 if (features & NETIF_F_IP_CSUM) 644 read_buf |= Tx_COE_EN_; 645 else 646 read_buf &= ~Tx_COE_EN_; 647 648 if (features & NETIF_F_RXCSUM) 649 read_buf |= Rx_COE_EN_; 650 else 651 read_buf &= ~Rx_COE_EN_; 652 653 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 654 if (ret < 0) 655 return ret; 656 657 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 658 return 0; 659} 660 661static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 662{ 663 return MAX_EEPROM_SIZE; 664} 665 666static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 667 struct ethtool_eeprom *ee, u8 *data) 668{ 669 struct usbnet *dev = netdev_priv(netdev); 670 671 ee->magic = LAN95XX_EEPROM_MAGIC; 672 673 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 674} 675 676static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 677 struct ethtool_eeprom *ee, u8 *data) 678{ 679 struct usbnet *dev = netdev_priv(netdev); 680 681 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 682 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 683 ee->magic); 684 return -EINVAL; 685 } 686 687 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 688} 689 690static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 691{ 692 /* all smsc95xx registers */ 693 return COE_CR - ID_REV + sizeof(u32); 694} 695 696static void 697smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 698 void *buf) 699{ 700 struct usbnet *dev = netdev_priv(netdev); 701 unsigned int i, j; 702 int retval; 703 u32 *data = buf; 704 705 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 706 if (retval < 0) { 707 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 708 return; 709 } 710 711 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 712 retval = smsc95xx_read_reg(dev, i, &data[j]); 713 if (retval < 0) { 714 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 715 return; 716 } 717 } 718} 719 720static void smsc95xx_ethtool_get_wol(struct net_device *net, 721 struct ethtool_wolinfo *wolinfo) 722{ 723 struct usbnet *dev = netdev_priv(net); 724 struct smsc95xx_priv *pdata = dev->driver_priv; 725 726 wolinfo->supported = SUPPORTED_WAKE; 727 wolinfo->wolopts = pdata->wolopts; 728} 729 730static int smsc95xx_ethtool_set_wol(struct net_device *net, 731 struct ethtool_wolinfo *wolinfo) 732{ 733 struct usbnet *dev = netdev_priv(net); 734 struct smsc95xx_priv *pdata = dev->driver_priv; 735 int ret; 736 737 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 738 return -EINVAL; 739 740 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 741 742 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 743 if (ret < 0) 744 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 745 746 return ret; 747} 748 749static u32 smsc95xx_get_link(struct net_device *net) 750{ 751 phy_read_status(net->phydev); 752 return net->phydev->link; 753} 754 755static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, 756 u8 *data) 757{ 758 switch (sset) { 759 case ETH_SS_TEST: 760 net_selftest_get_strings(data); 761 break; 762 } 763} 764 765static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) 766{ 767 switch (sset) { 768 case ETH_SS_TEST: 769 return net_selftest_get_count(); 770 default: 771 return -EOPNOTSUPP; 772 } 773} 774 775static const struct ethtool_ops smsc95xx_ethtool_ops = { 776 .get_link = smsc95xx_get_link, 777 .nway_reset = phy_ethtool_nway_reset, 778 .get_drvinfo = usbnet_get_drvinfo, 779 .get_msglevel = usbnet_get_msglevel, 780 .set_msglevel = usbnet_set_msglevel, 781 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 782 .get_eeprom = smsc95xx_ethtool_get_eeprom, 783 .set_eeprom = smsc95xx_ethtool_set_eeprom, 784 .get_regs_len = smsc95xx_ethtool_getregslen, 785 .get_regs = smsc95xx_ethtool_getregs, 786 .get_wol = smsc95xx_ethtool_get_wol, 787 .set_wol = smsc95xx_ethtool_set_wol, 788 .get_link_ksettings = phy_ethtool_get_link_ksettings, 789 .set_link_ksettings = phy_ethtool_set_link_ksettings, 790 .get_ts_info = ethtool_op_get_ts_info, 791 .self_test = net_selftest, 792 .get_strings = smsc95xx_ethtool_get_strings, 793 .get_sset_count = smsc95xx_ethtool_get_sset_count, 794}; 795 796static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 797{ 798 if (!netif_running(netdev)) 799 return -EINVAL; 800 801 return phy_mii_ioctl(netdev->phydev, rq, cmd); 802} 803 804static void smsc95xx_init_mac_address(struct usbnet *dev) 805{ 806 u8 addr[ETH_ALEN]; 807 808 /* maybe the boot loader passed the MAC address in devicetree */ 809 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 810 if (is_valid_ether_addr(dev->net->dev_addr)) { 811 /* device tree values are valid so use them */ 812 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 813 return; 814 } 815 } 816 817 /* try reading mac address from EEPROM */ 818 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 819 eth_hw_addr_set(dev->net, addr); 820 if (is_valid_ether_addr(dev->net->dev_addr)) { 821 /* eeprom values are valid so use them */ 822 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 823 return; 824 } 825 } 826 827 /* no useful static MAC address found. generate a random one */ 828 eth_hw_addr_random(dev->net); 829 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 830} 831 832static int smsc95xx_set_mac_address(struct usbnet *dev) 833{ 834 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 835 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 836 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 837 int ret; 838 839 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 840 if (ret < 0) 841 return ret; 842 843 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 844} 845 846/* starts the TX path */ 847static int smsc95xx_start_tx_path(struct usbnet *dev) 848{ 849 struct smsc95xx_priv *pdata = dev->driver_priv; 850 unsigned long flags; 851 int ret; 852 853 /* Enable Tx at MAC */ 854 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 855 pdata->mac_cr |= MAC_CR_TXEN_; 856 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 857 858 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 859 if (ret < 0) 860 return ret; 861 862 /* Enable Tx at SCSRs */ 863 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 864} 865 866/* Starts the Receive path */ 867static int smsc95xx_start_rx_path(struct usbnet *dev) 868{ 869 struct smsc95xx_priv *pdata = dev->driver_priv; 870 unsigned long flags; 871 872 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 873 pdata->mac_cr |= MAC_CR_RXEN_; 874 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 875 876 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 877} 878 879static int smsc95xx_reset(struct usbnet *dev) 880{ 881 struct smsc95xx_priv *pdata = dev->driver_priv; 882 u32 read_buf, write_buf, burst_cap; 883 int ret = 0, timeout; 884 885 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 886 887 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 888 if (ret < 0) 889 return ret; 890 891 timeout = 0; 892 do { 893 msleep(10); 894 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 895 if (ret < 0) 896 return ret; 897 timeout++; 898 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 899 900 if (timeout >= 100) { 901 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 902 return -ETIMEDOUT; 903 } 904 905 ret = smsc95xx_set_mac_address(dev); 906 if (ret < 0) 907 return ret; 908 909 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 910 dev->net->dev_addr); 911 912 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 913 if (ret < 0) 914 return ret; 915 916 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 917 read_buf); 918 919 read_buf |= HW_CFG_BIR_; 920 921 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 922 if (ret < 0) 923 return ret; 924 925 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 926 if (ret < 0) 927 return ret; 928 929 netif_dbg(dev, ifup, dev->net, 930 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 931 read_buf); 932 933 if (!turbo_mode) { 934 burst_cap = 0; 935 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 936 } else if (dev->udev->speed == USB_SPEED_HIGH) { 937 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 938 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 939 } else { 940 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 941 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 942 } 943 944 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 945 (ulong)dev->rx_urb_size); 946 947 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 948 if (ret < 0) 949 return ret; 950 951 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 952 if (ret < 0) 953 return ret; 954 955 netif_dbg(dev, ifup, dev->net, 956 "Read Value from BURST_CAP after writing: 0x%08x\n", 957 read_buf); 958 959 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 960 if (ret < 0) 961 return ret; 962 963 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 964 if (ret < 0) 965 return ret; 966 967 netif_dbg(dev, ifup, dev->net, 968 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 969 read_buf); 970 971 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 972 if (ret < 0) 973 return ret; 974 975 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 976 read_buf); 977 978 if (turbo_mode) 979 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 980 981 read_buf &= ~HW_CFG_RXDOFF_; 982 983 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 984 read_buf |= NET_IP_ALIGN << 9; 985 986 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 987 if (ret < 0) 988 return ret; 989 990 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 991 if (ret < 0) 992 return ret; 993 994 netif_dbg(dev, ifup, dev->net, 995 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 996 997 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 998 if (ret < 0) 999 return ret; 1000 1001 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1002 if (ret < 0) 1003 return ret; 1004 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1005 1006 /* Configure GPIO pins as LED outputs */ 1007 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1008 LED_GPIO_CFG_FDX_LED; 1009 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 1010 if (ret < 0) 1011 return ret; 1012 1013 /* Init Tx */ 1014 ret = smsc95xx_write_reg(dev, FLOW, 0); 1015 if (ret < 0) 1016 return ret; 1017 1018 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1019 if (ret < 0) 1020 return ret; 1021 1022 /* Don't need mac_cr_lock during initialisation */ 1023 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1024 if (ret < 0) 1025 return ret; 1026 1027 /* Init Rx */ 1028 /* Set Vlan */ 1029 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1030 if (ret < 0) 1031 return ret; 1032 1033 /* Enable or disable checksum offload engines */ 1034 ret = smsc95xx_set_features(dev->net, dev->net->features); 1035 if (ret < 0) { 1036 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1037 return ret; 1038 } 1039 1040 smsc95xx_set_multicast(dev->net); 1041 1042 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1043 if (ret < 0) 1044 return ret; 1045 1046 /* enable PHY interrupts */ 1047 read_buf |= INT_EP_CTL_PHY_INT_; 1048 1049 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1050 if (ret < 0) 1051 return ret; 1052 1053 ret = smsc95xx_start_tx_path(dev); 1054 if (ret < 0) { 1055 netdev_warn(dev->net, "Failed to start TX path\n"); 1056 return ret; 1057 } 1058 1059 ret = smsc95xx_start_rx_path(dev); 1060 if (ret < 0) { 1061 netdev_warn(dev->net, "Failed to start RX path\n"); 1062 return ret; 1063 } 1064 1065 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1066 return 0; 1067} 1068 1069static const struct net_device_ops smsc95xx_netdev_ops = { 1070 .ndo_open = usbnet_open, 1071 .ndo_stop = usbnet_stop, 1072 .ndo_start_xmit = usbnet_start_xmit, 1073 .ndo_tx_timeout = usbnet_tx_timeout, 1074 .ndo_change_mtu = usbnet_change_mtu, 1075 .ndo_get_stats64 = dev_get_tstats64, 1076 .ndo_set_mac_address = eth_mac_addr, 1077 .ndo_validate_addr = eth_validate_addr, 1078 .ndo_eth_ioctl = smsc95xx_ioctl, 1079 .ndo_set_rx_mode = smsc95xx_set_multicast, 1080 .ndo_set_features = smsc95xx_set_features, 1081}; 1082 1083static void smsc95xx_handle_link_change(struct net_device *net) 1084{ 1085 struct usbnet *dev = netdev_priv(net); 1086 1087 phy_print_status(net->phydev); 1088 smsc95xx_mac_update_fullduplex(dev); 1089 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1090} 1091 1092static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1093{ 1094 struct smsc95xx_priv *pdata; 1095 char usb_path[64]; 1096 int ret, phy_irq; 1097 u32 val; 1098 1099 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1100 1101 ret = usbnet_get_endpoints(dev, intf); 1102 if (ret < 0) { 1103 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1104 return ret; 1105 } 1106 1107 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1108 if (!pdata) 1109 return -ENOMEM; 1110 1111 dev->driver_priv = pdata; 1112 1113 spin_lock_init(&pdata->mac_cr_lock); 1114 1115 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1116 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1117 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1118 * it is transmitted as all ones. The zero transmitted checksum means 1119 * transmitter generated no checksum. Hence, enable csum offload only 1120 * for ipv4 packets. 1121 */ 1122 if (DEFAULT_TX_CSUM_ENABLE) 1123 dev->net->features |= NETIF_F_IP_CSUM; 1124 if (DEFAULT_RX_CSUM_ENABLE) 1125 dev->net->features |= NETIF_F_RXCSUM; 1126 1127 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1128 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1129 1130 smsc95xx_init_mac_address(dev); 1131 1132 /* Init all registers */ 1133 ret = smsc95xx_reset(dev); 1134 if (ret) 1135 goto free_pdata; 1136 1137 /* create irq domain for use by PHY driver and GPIO consumers */ 1138 usb_make_path(dev->udev, usb_path, sizeof(usb_path)); 1139 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path); 1140 if (!pdata->irqfwnode) { 1141 ret = -ENOMEM; 1142 goto free_pdata; 1143 } 1144 1145 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode, 1146 SMSC95XX_NR_IRQS, 1147 &irq_domain_simple_ops, 1148 pdata); 1149 if (!pdata->irqdomain) { 1150 ret = -ENOMEM; 1151 goto free_irqfwnode; 1152 } 1153 1154 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ); 1155 if (!phy_irq) { 1156 ret = -ENOENT; 1157 goto remove_irqdomain; 1158 } 1159 1160 pdata->irqchip = dummy_irq_chip; 1161 pdata->irqchip.name = SMSC_CHIPNAME; 1162 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip, 1163 handle_simple_irq, "phy"); 1164 1165 pdata->mdiobus = mdiobus_alloc(); 1166 if (!pdata->mdiobus) { 1167 ret = -ENOMEM; 1168 goto dispose_irq; 1169 } 1170 1171 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1172 if (ret < 0) 1173 goto free_mdio; 1174 1175 pdata->is_internal_phy = !(val & HW_CFG_PSEL_); 1176 if (pdata->is_internal_phy) 1177 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1178 1179 pdata->mdiobus->priv = dev; 1180 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1181 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1182 pdata->mdiobus->reset = smsc95xx_mdiobus_reset; 1183 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1184 pdata->mdiobus->parent = &dev->udev->dev; 1185 1186 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1187 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1188 1189 ret = mdiobus_register(pdata->mdiobus); 1190 if (ret) { 1191 netdev_err(dev->net, "Could not register MDIO bus\n"); 1192 goto free_mdio; 1193 } 1194 1195 pdata->phydev = phy_find_first(pdata->mdiobus); 1196 if (!pdata->phydev) { 1197 netdev_err(dev->net, "no PHY found\n"); 1198 ret = -ENODEV; 1199 goto unregister_mdio; 1200 } 1201 1202 pdata->phydev->irq = phy_irq; 1203 pdata->phydev->is_internal = pdata->is_internal_phy; 1204 1205 /* detect device revision as different features may be available */ 1206 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1207 if (ret < 0) 1208 goto unregister_mdio; 1209 1210 val >>= 16; 1211 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1212 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1213 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1214 FEATURE_PHY_NLP_CROSSOVER | 1215 FEATURE_REMOTE_WAKEUP); 1216 else if (val == ID_REV_CHIP_ID_9512_) 1217 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1218 1219 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1220 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1221 dev->net->flags |= IFF_MULTICAST; 1222 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1223 dev->net->min_mtu = ETH_MIN_MTU; 1224 dev->net->max_mtu = ETH_DATA_LEN; 1225 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1226 1227 ret = phy_connect_direct(dev->net, pdata->phydev, 1228 &smsc95xx_handle_link_change, 1229 PHY_INTERFACE_MODE_MII); 1230 if (ret) { 1231 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1232 goto unregister_mdio; 1233 } 1234 1235 phy_attached_info(dev->net->phydev); 1236 1237 return 0; 1238 1239unregister_mdio: 1240 mdiobus_unregister(pdata->mdiobus); 1241 1242free_mdio: 1243 mdiobus_free(pdata->mdiobus); 1244 1245dispose_irq: 1246 irq_dispose_mapping(phy_irq); 1247 1248remove_irqdomain: 1249 irq_domain_remove(pdata->irqdomain); 1250 1251free_irqfwnode: 1252 irq_domain_free_fwnode(pdata->irqfwnode); 1253 1254free_pdata: 1255 kfree(pdata); 1256 return ret; 1257} 1258 1259static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1260{ 1261 struct smsc95xx_priv *pdata = dev->driver_priv; 1262 1263 phy_disconnect(dev->net->phydev); 1264 mdiobus_unregister(pdata->mdiobus); 1265 mdiobus_free(pdata->mdiobus); 1266 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); 1267 irq_domain_remove(pdata->irqdomain); 1268 irq_domain_free_fwnode(pdata->irqfwnode); 1269 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1270 kfree(pdata); 1271} 1272 1273static int smsc95xx_start_phy(struct usbnet *dev) 1274{ 1275 phy_start(dev->net->phydev); 1276 1277 return 0; 1278} 1279 1280static int smsc95xx_stop(struct usbnet *dev) 1281{ 1282 phy_stop(dev->net->phydev); 1283 1284 return 0; 1285} 1286 1287static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1288{ 1289 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1290 return crc << ((filter % 2) * 16); 1291} 1292 1293static int smsc95xx_link_ok(struct usbnet *dev) 1294{ 1295 struct smsc95xx_priv *pdata = dev->driver_priv; 1296 int ret; 1297 1298 /* first, a dummy read, needed to latch some MII phys */ 1299 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1300 if (ret < 0) 1301 return ret; 1302 1303 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1304 if (ret < 0) 1305 return ret; 1306 1307 return !!(ret & BMSR_LSTATUS); 1308} 1309 1310static int smsc95xx_enter_suspend0(struct usbnet *dev) 1311{ 1312 struct smsc95xx_priv *pdata = dev->driver_priv; 1313 u32 val; 1314 int ret; 1315 1316 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1317 if (ret < 0) 1318 return ret; 1319 1320 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1321 val |= PM_CTL_SUS_MODE_0; 1322 1323 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1324 if (ret < 0) 1325 return ret; 1326 1327 /* clear wol status */ 1328 val &= ~PM_CTL_WUPS_; 1329 val |= PM_CTL_WUPS_WOL_; 1330 1331 /* enable energy detection */ 1332 if (pdata->wolopts & WAKE_PHY) 1333 val |= PM_CTL_WUPS_ED_; 1334 1335 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1336 if (ret < 0) 1337 return ret; 1338 1339 /* read back PM_CTRL */ 1340 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1341 if (ret < 0) 1342 return ret; 1343 1344 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1345 1346 return 0; 1347} 1348 1349static int smsc95xx_enter_suspend1(struct usbnet *dev) 1350{ 1351 struct smsc95xx_priv *pdata = dev->driver_priv; 1352 int ret, phy_id = pdata->phydev->mdio.addr; 1353 u32 val; 1354 1355 /* reconfigure link pulse detection timing for 1356 * compatibility with non-standard link partners 1357 */ 1358 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1359 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, 1360 PHY_EDPD_CONFIG_DEFAULT); 1361 1362 /* enable energy detect power-down mode */ 1363 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); 1364 if (ret < 0) 1365 return ret; 1366 1367 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1368 1369 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret); 1370 1371 /* enter SUSPEND1 mode */ 1372 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1373 if (ret < 0) 1374 return ret; 1375 1376 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1377 val |= PM_CTL_SUS_MODE_1; 1378 1379 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1380 if (ret < 0) 1381 return ret; 1382 1383 /* clear wol status, enable energy detection */ 1384 val &= ~PM_CTL_WUPS_; 1385 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1386 1387 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1388 if (ret < 0) 1389 return ret; 1390 1391 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1392 1393 return 0; 1394} 1395 1396static int smsc95xx_enter_suspend2(struct usbnet *dev) 1397{ 1398 struct smsc95xx_priv *pdata = dev->driver_priv; 1399 u32 val; 1400 int ret; 1401 1402 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1403 if (ret < 0) 1404 return ret; 1405 1406 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1407 val |= PM_CTL_SUS_MODE_2; 1408 1409 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1410 if (ret < 0) 1411 return ret; 1412 1413 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1414 1415 return 0; 1416} 1417 1418static int smsc95xx_enter_suspend3(struct usbnet *dev) 1419{ 1420 struct smsc95xx_priv *pdata = dev->driver_priv; 1421 u32 val; 1422 int ret; 1423 1424 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val); 1425 if (ret < 0) 1426 return ret; 1427 1428 if (val & RX_FIFO_INF_USED_) { 1429 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1430 return -EBUSY; 1431 } 1432 1433 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1434 if (ret < 0) 1435 return ret; 1436 1437 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1438 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1439 1440 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1441 if (ret < 0) 1442 return ret; 1443 1444 /* clear wol status */ 1445 val &= ~PM_CTL_WUPS_; 1446 val |= PM_CTL_WUPS_WOL_; 1447 1448 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1449 if (ret < 0) 1450 return ret; 1451 1452 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1453 1454 return 0; 1455} 1456 1457static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1458{ 1459 struct smsc95xx_priv *pdata = dev->driver_priv; 1460 1461 if (!netif_running(dev->net)) { 1462 /* interface is ifconfig down so fully power down hw */ 1463 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1464 return smsc95xx_enter_suspend2(dev); 1465 } 1466 1467 if (!link_up) { 1468 /* link is down so enter EDPD mode, but only if device can 1469 * reliably resume from it. This check should be redundant 1470 * as current FEATURE_REMOTE_WAKEUP parts also support 1471 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1472 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1473 netdev_warn(dev->net, "EDPD not supported\n"); 1474 return -EBUSY; 1475 } 1476 1477 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1478 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1479 return smsc95xx_enter_suspend1(dev); 1480 } 1481 1482 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1483 return smsc95xx_enter_suspend3(dev); 1484} 1485 1486static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1487{ 1488 struct usbnet *dev = usb_get_intfdata(intf); 1489 struct smsc95xx_priv *pdata = dev->driver_priv; 1490 u32 val, link_up; 1491 int ret; 1492 1493 pdata->pm_task = current; 1494 1495 ret = usbnet_suspend(intf, message); 1496 if (ret < 0) { 1497 netdev_warn(dev->net, "usbnet_suspend error\n"); 1498 pdata->pm_task = NULL; 1499 return ret; 1500 } 1501 1502 if (pdata->suspend_flags) { 1503 netdev_warn(dev->net, "error during last resume\n"); 1504 pdata->suspend_flags = 0; 1505 } 1506 1507 link_up = smsc95xx_link_ok(dev); 1508 1509 if (message.event == PM_EVENT_AUTO_SUSPEND && 1510 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1511 ret = smsc95xx_autosuspend(dev, link_up); 1512 goto done; 1513 } 1514 1515 /* if we get this far we're not autosuspending */ 1516 /* if no wol options set, or if link is down and we're not waking on 1517 * PHY activity, enter lowest power SUSPEND2 mode 1518 */ 1519 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1520 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1521 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1522 1523 /* disable energy detect (link up) & wake up events */ 1524 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1525 if (ret < 0) 1526 goto done; 1527 1528 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1529 1530 ret = smsc95xx_write_reg(dev, WUCSR, val); 1531 if (ret < 0) 1532 goto done; 1533 1534 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1535 if (ret < 0) 1536 goto done; 1537 1538 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1539 1540 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1541 if (ret < 0) 1542 goto done; 1543 1544 ret = smsc95xx_enter_suspend2(dev); 1545 goto done; 1546 } 1547 1548 if (pdata->wolopts & WAKE_PHY) { 1549 /* if link is down then configure EDPD and enter SUSPEND1, 1550 * otherwise enter SUSPEND0 below 1551 */ 1552 if (!link_up) { 1553 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1554 ret = smsc95xx_enter_suspend1(dev); 1555 goto done; 1556 } 1557 } 1558 1559 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1560 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1561 u32 command[2]; 1562 u32 offset[2]; 1563 u32 crc[4]; 1564 int wuff_filter_count = 1565 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1566 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1567 int i, filter = 0; 1568 1569 if (!filter_mask) { 1570 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1571 ret = -ENOMEM; 1572 goto done; 1573 } 1574 1575 memset(command, 0, sizeof(command)); 1576 memset(offset, 0, sizeof(offset)); 1577 memset(crc, 0, sizeof(crc)); 1578 1579 if (pdata->wolopts & WAKE_BCAST) { 1580 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1581 netdev_info(dev->net, "enabling broadcast detection\n"); 1582 filter_mask[filter * 4] = 0x003F; 1583 filter_mask[filter * 4 + 1] = 0x00; 1584 filter_mask[filter * 4 + 2] = 0x00; 1585 filter_mask[filter * 4 + 3] = 0x00; 1586 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1587 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1588 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1589 filter++; 1590 } 1591 1592 if (pdata->wolopts & WAKE_MCAST) { 1593 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1594 netdev_info(dev->net, "enabling multicast detection\n"); 1595 filter_mask[filter * 4] = 0x0007; 1596 filter_mask[filter * 4 + 1] = 0x00; 1597 filter_mask[filter * 4 + 2] = 0x00; 1598 filter_mask[filter * 4 + 3] = 0x00; 1599 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1600 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1601 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1602 filter++; 1603 } 1604 1605 if (pdata->wolopts & WAKE_ARP) { 1606 const u8 arp[] = {0x08, 0x06}; 1607 netdev_info(dev->net, "enabling ARP detection\n"); 1608 filter_mask[filter * 4] = 0x0003; 1609 filter_mask[filter * 4 + 1] = 0x00; 1610 filter_mask[filter * 4 + 2] = 0x00; 1611 filter_mask[filter * 4 + 3] = 0x00; 1612 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1613 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1614 crc[filter/2] |= smsc_crc(arp, 2, filter); 1615 filter++; 1616 } 1617 1618 if (pdata->wolopts & WAKE_UCAST) { 1619 netdev_info(dev->net, "enabling unicast detection\n"); 1620 filter_mask[filter * 4] = 0x003F; 1621 filter_mask[filter * 4 + 1] = 0x00; 1622 filter_mask[filter * 4 + 2] = 0x00; 1623 filter_mask[filter * 4 + 3] = 0x00; 1624 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1625 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1626 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1627 filter++; 1628 } 1629 1630 for (i = 0; i < (wuff_filter_count * 4); i++) { 1631 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]); 1632 if (ret < 0) { 1633 kfree(filter_mask); 1634 goto done; 1635 } 1636 } 1637 kfree(filter_mask); 1638 1639 for (i = 0; i < (wuff_filter_count / 4); i++) { 1640 ret = smsc95xx_write_reg(dev, WUFF, command[i]); 1641 if (ret < 0) 1642 goto done; 1643 } 1644 1645 for (i = 0; i < (wuff_filter_count / 4); i++) { 1646 ret = smsc95xx_write_reg(dev, WUFF, offset[i]); 1647 if (ret < 0) 1648 goto done; 1649 } 1650 1651 for (i = 0; i < (wuff_filter_count / 2); i++) { 1652 ret = smsc95xx_write_reg(dev, WUFF, crc[i]); 1653 if (ret < 0) 1654 goto done; 1655 } 1656 1657 /* clear any pending pattern match packet status */ 1658 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1659 if (ret < 0) 1660 goto done; 1661 1662 val |= WUCSR_WUFR_; 1663 1664 ret = smsc95xx_write_reg(dev, WUCSR, val); 1665 if (ret < 0) 1666 goto done; 1667 } 1668 1669 if (pdata->wolopts & WAKE_MAGIC) { 1670 /* clear any pending magic packet status */ 1671 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1672 if (ret < 0) 1673 goto done; 1674 1675 val |= WUCSR_MPR_; 1676 1677 ret = smsc95xx_write_reg(dev, WUCSR, val); 1678 if (ret < 0) 1679 goto done; 1680 } 1681 1682 /* enable/disable wakeup sources */ 1683 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1684 if (ret < 0) 1685 goto done; 1686 1687 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1688 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1689 val |= WUCSR_WAKE_EN_; 1690 } else { 1691 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1692 val &= ~WUCSR_WAKE_EN_; 1693 } 1694 1695 if (pdata->wolopts & WAKE_MAGIC) { 1696 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1697 val |= WUCSR_MPEN_; 1698 } else { 1699 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1700 val &= ~WUCSR_MPEN_; 1701 } 1702 1703 ret = smsc95xx_write_reg(dev, WUCSR, val); 1704 if (ret < 0) 1705 goto done; 1706 1707 /* enable wol wakeup source */ 1708 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1709 if (ret < 0) 1710 goto done; 1711 1712 val |= PM_CTL_WOL_EN_; 1713 1714 /* phy energy detect wakeup source */ 1715 if (pdata->wolopts & WAKE_PHY) 1716 val |= PM_CTL_ED_EN_; 1717 1718 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1719 if (ret < 0) 1720 goto done; 1721 1722 /* enable receiver to enable frame reception */ 1723 smsc95xx_start_rx_path(dev); 1724 1725 /* some wol options are enabled, so enter SUSPEND0 */ 1726 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1727 ret = smsc95xx_enter_suspend0(dev); 1728 1729done: 1730 /* 1731 * TODO: resume() might need to handle the suspend failure 1732 * in system sleep 1733 */ 1734 if (ret && PMSG_IS_AUTO(message)) 1735 usbnet_resume(intf); 1736 1737 pdata->pm_task = NULL; 1738 return ret; 1739} 1740 1741static int smsc95xx_resume(struct usb_interface *intf) 1742{ 1743 struct usbnet *dev = usb_get_intfdata(intf); 1744 struct smsc95xx_priv *pdata; 1745 u8 suspend_flags; 1746 int ret; 1747 u32 val; 1748 1749 BUG_ON(!dev); 1750 pdata = dev->driver_priv; 1751 suspend_flags = pdata->suspend_flags; 1752 1753 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1754 1755 /* do this first to ensure it's cleared even in error case */ 1756 pdata->suspend_flags = 0; 1757 1758 pdata->pm_task = current; 1759 1760 if (suspend_flags & SUSPEND_ALLMODES) { 1761 /* clear wake-up sources */ 1762 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1763 if (ret < 0) 1764 goto done; 1765 1766 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1767 1768 ret = smsc95xx_write_reg(dev, WUCSR, val); 1769 if (ret < 0) 1770 goto done; 1771 1772 /* clear wake-up status */ 1773 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1774 if (ret < 0) 1775 goto done; 1776 1777 val &= ~PM_CTL_WOL_EN_; 1778 val |= PM_CTL_WUPS_; 1779 1780 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1781 if (ret < 0) 1782 goto done; 1783 } 1784 1785 phy_init_hw(pdata->phydev); 1786 1787 ret = usbnet_resume(intf); 1788 if (ret < 0) 1789 netdev_warn(dev->net, "usbnet_resume error\n"); 1790 1791done: 1792 pdata->pm_task = NULL; 1793 return ret; 1794} 1795 1796static int smsc95xx_reset_resume(struct usb_interface *intf) 1797{ 1798 struct usbnet *dev = usb_get_intfdata(intf); 1799 struct smsc95xx_priv *pdata = dev->driver_priv; 1800 int ret; 1801 1802 pdata->pm_task = current; 1803 ret = smsc95xx_reset(dev); 1804 pdata->pm_task = NULL; 1805 if (ret < 0) 1806 return ret; 1807 1808 return smsc95xx_resume(intf); 1809} 1810 1811static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1812{ 1813 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1814 skb->ip_summed = CHECKSUM_COMPLETE; 1815 skb_trim(skb, skb->len - 2); 1816} 1817 1818static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1819{ 1820 /* This check is no longer done by usbnet */ 1821 if (skb->len < dev->net->hard_header_len) 1822 return 0; 1823 1824 while (skb->len > 0) { 1825 u32 header, align_count; 1826 struct sk_buff *ax_skb; 1827 unsigned char *packet; 1828 u16 size; 1829 1830 header = get_unaligned_le32(skb->data); 1831 skb_pull(skb, 4 + NET_IP_ALIGN); 1832 packet = skb->data; 1833 1834 /* get the packet length */ 1835 size = (u16)((header & RX_STS_FL_) >> 16); 1836 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1837 1838 if (unlikely(size > skb->len)) { 1839 netif_dbg(dev, rx_err, dev->net, 1840 "size err header=0x%08x\n", header); 1841 return 0; 1842 } 1843 1844 if (unlikely(header & RX_STS_ES_)) { 1845 netif_dbg(dev, rx_err, dev->net, 1846 "Error header=0x%08x\n", header); 1847 dev->net->stats.rx_errors++; 1848 dev->net->stats.rx_dropped++; 1849 1850 if (header & RX_STS_CRC_) { 1851 dev->net->stats.rx_crc_errors++; 1852 } else { 1853 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1854 dev->net->stats.rx_frame_errors++; 1855 1856 if ((header & RX_STS_LE_) && 1857 (!(header & RX_STS_FT_))) 1858 dev->net->stats.rx_length_errors++; 1859 } 1860 } else { 1861 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1862 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1863 netif_dbg(dev, rx_err, dev->net, 1864 "size err header=0x%08x\n", header); 1865 return 0; 1866 } 1867 1868 /* last frame in this batch */ 1869 if (skb->len == size) { 1870 if (dev->net->features & NETIF_F_RXCSUM) 1871 smsc95xx_rx_csum_offload(skb); 1872 skb_trim(skb, skb->len - 4); /* remove fcs */ 1873 skb->truesize = size + sizeof(struct sk_buff); 1874 1875 return 1; 1876 } 1877 1878 ax_skb = skb_clone(skb, GFP_ATOMIC); 1879 if (unlikely(!ax_skb)) { 1880 netdev_warn(dev->net, "Error allocating skb\n"); 1881 return 0; 1882 } 1883 1884 ax_skb->len = size; 1885 ax_skb->data = packet; 1886 skb_set_tail_pointer(ax_skb, size); 1887 1888 if (dev->net->features & NETIF_F_RXCSUM) 1889 smsc95xx_rx_csum_offload(ax_skb); 1890 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1891 ax_skb->truesize = size + sizeof(struct sk_buff); 1892 1893 usbnet_skb_return(dev, ax_skb); 1894 } 1895 1896 skb_pull(skb, size); 1897 1898 /* padding bytes before the next frame starts */ 1899 if (skb->len) 1900 skb_pull(skb, align_count); 1901 } 1902 1903 return 1; 1904} 1905 1906static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1907{ 1908 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1909 u16 high_16 = low_16 + skb->csum_offset; 1910 return (high_16 << 16) | low_16; 1911} 1912 1913/* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1914 * transmission. This is fairly unlikely, only seems to trigger with some 1915 * short TCP ACK packets sent. 1916 * 1917 * Note, this calculation should probably check for the alignment of the 1918 * data as well, but a straight check for csum being in the last four bytes 1919 * of the packet should be ok for now. 1920 */ 1921static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1922{ 1923 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1924 1925 if (skb->len <= 45) 1926 return false; 1927 return skb->csum_offset < (len - (4 + 1)); 1928} 1929 1930static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1931 struct sk_buff *skb, gfp_t flags) 1932{ 1933 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1934 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1935 u32 tx_cmd_a, tx_cmd_b; 1936 void *ptr; 1937 1938 /* We do not advertise SG, so skbs should be already linearized */ 1939 BUG_ON(skb_shinfo(skb)->nr_frags); 1940 1941 /* Make writable and expand header space by overhead if required */ 1942 if (skb_cow_head(skb, overhead)) { 1943 /* Must deallocate here as returning NULL to indicate error 1944 * means the skb won't be deallocated in the caller. 1945 */ 1946 dev_kfree_skb_any(skb); 1947 return NULL; 1948 } 1949 1950 tx_cmd_b = (u32)skb->len; 1951 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1952 1953 if (csum) { 1954 if (!smsc95xx_can_tx_checksum(skb)) { 1955 /* workaround - hardware tx checksum does not work 1956 * properly with extremely small packets */ 1957 long csstart = skb_checksum_start_offset(skb); 1958 __wsum calc = csum_partial(skb->data + csstart, 1959 skb->len - csstart, 0); 1960 *((__sum16 *)(skb->data + csstart 1961 + skb->csum_offset)) = csum_fold(calc); 1962 1963 csum = false; 1964 } else { 1965 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1966 ptr = skb_push(skb, 4); 1967 put_unaligned_le32(csum_preamble, ptr); 1968 1969 tx_cmd_a += 4; 1970 tx_cmd_b += 4; 1971 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1972 } 1973 } 1974 1975 ptr = skb_push(skb, 8); 1976 put_unaligned_le32(tx_cmd_a, ptr); 1977 put_unaligned_le32(tx_cmd_b, ptr+4); 1978 1979 return skb; 1980} 1981 1982static int smsc95xx_manage_power(struct usbnet *dev, int on) 1983{ 1984 struct smsc95xx_priv *pdata = dev->driver_priv; 1985 1986 dev->intf->needs_remote_wakeup = on; 1987 1988 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1989 return 0; 1990 1991 /* this chip revision isn't capable of remote wakeup */ 1992 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1993 1994 if (on) 1995 usb_autopm_get_interface_no_resume(dev->intf); 1996 else 1997 usb_autopm_put_interface(dev->intf); 1998 1999 return 0; 2000} 2001 2002static const struct driver_info smsc95xx_info = { 2003 .description = "smsc95xx USB 2.0 Ethernet", 2004 .bind = smsc95xx_bind, 2005 .unbind = smsc95xx_unbind, 2006 .reset = smsc95xx_reset, 2007 .check_connect = smsc95xx_start_phy, 2008 .stop = smsc95xx_stop, 2009 .rx_fixup = smsc95xx_rx_fixup, 2010 .tx_fixup = smsc95xx_tx_fixup, 2011 .status = smsc95xx_status, 2012 .manage_power = smsc95xx_manage_power, 2013 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2014}; 2015 2016static const struct usb_device_id products[] = { 2017 { 2018 /* SMSC9500 USB Ethernet Device */ 2019 USB_DEVICE(0x0424, 0x9500), 2020 .driver_info = (unsigned long) &smsc95xx_info, 2021 }, 2022 { 2023 /* SMSC9505 USB Ethernet Device */ 2024 USB_DEVICE(0x0424, 0x9505), 2025 .driver_info = (unsigned long) &smsc95xx_info, 2026 }, 2027 { 2028 /* SMSC9500A USB Ethernet Device */ 2029 USB_DEVICE(0x0424, 0x9E00), 2030 .driver_info = (unsigned long) &smsc95xx_info, 2031 }, 2032 { 2033 /* SMSC9505A USB Ethernet Device */ 2034 USB_DEVICE(0x0424, 0x9E01), 2035 .driver_info = (unsigned long) &smsc95xx_info, 2036 }, 2037 { 2038 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2039 USB_DEVICE(0x0424, 0xec00), 2040 .driver_info = (unsigned long) &smsc95xx_info, 2041 }, 2042 { 2043 /* SMSC9500 USB Ethernet Device (SAL10) */ 2044 USB_DEVICE(0x0424, 0x9900), 2045 .driver_info = (unsigned long) &smsc95xx_info, 2046 }, 2047 { 2048 /* SMSC9505 USB Ethernet Device (SAL10) */ 2049 USB_DEVICE(0x0424, 0x9901), 2050 .driver_info = (unsigned long) &smsc95xx_info, 2051 }, 2052 { 2053 /* SMSC9500A USB Ethernet Device (SAL10) */ 2054 USB_DEVICE(0x0424, 0x9902), 2055 .driver_info = (unsigned long) &smsc95xx_info, 2056 }, 2057 { 2058 /* SMSC9505A USB Ethernet Device (SAL10) */ 2059 USB_DEVICE(0x0424, 0x9903), 2060 .driver_info = (unsigned long) &smsc95xx_info, 2061 }, 2062 { 2063 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2064 USB_DEVICE(0x0424, 0x9904), 2065 .driver_info = (unsigned long) &smsc95xx_info, 2066 }, 2067 { 2068 /* SMSC9500A USB Ethernet Device (HAL) */ 2069 USB_DEVICE(0x0424, 0x9905), 2070 .driver_info = (unsigned long) &smsc95xx_info, 2071 }, 2072 { 2073 /* SMSC9505A USB Ethernet Device (HAL) */ 2074 USB_DEVICE(0x0424, 0x9906), 2075 .driver_info = (unsigned long) &smsc95xx_info, 2076 }, 2077 { 2078 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2079 USB_DEVICE(0x0424, 0x9907), 2080 .driver_info = (unsigned long) &smsc95xx_info, 2081 }, 2082 { 2083 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2084 USB_DEVICE(0x0424, 0x9908), 2085 .driver_info = (unsigned long) &smsc95xx_info, 2086 }, 2087 { 2088 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2089 USB_DEVICE(0x0424, 0x9909), 2090 .driver_info = (unsigned long) &smsc95xx_info, 2091 }, 2092 { 2093 /* SMSC LAN9530 USB Ethernet Device */ 2094 USB_DEVICE(0x0424, 0x9530), 2095 .driver_info = (unsigned long) &smsc95xx_info, 2096 }, 2097 { 2098 /* SMSC LAN9730 USB Ethernet Device */ 2099 USB_DEVICE(0x0424, 0x9730), 2100 .driver_info = (unsigned long) &smsc95xx_info, 2101 }, 2102 { 2103 /* SMSC LAN89530 USB Ethernet Device */ 2104 USB_DEVICE(0x0424, 0x9E08), 2105 .driver_info = (unsigned long) &smsc95xx_info, 2106 }, 2107 { 2108 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */ 2109 USB_DEVICE(0x0878, 0x1400), 2110 .driver_info = (unsigned long)&smsc95xx_info, 2111 }, 2112 { 2113 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ 2114 USB_DEVICE(0x184F, 0x0051), 2115 .driver_info = (unsigned long)&smsc95xx_info, 2116 }, 2117 { }, /* END */ 2118}; 2119MODULE_DEVICE_TABLE(usb, products); 2120 2121static struct usb_driver smsc95xx_driver = { 2122 .name = "smsc95xx", 2123 .id_table = products, 2124 .probe = usbnet_probe, 2125 .suspend = smsc95xx_suspend, 2126 .resume = smsc95xx_resume, 2127 .reset_resume = smsc95xx_reset_resume, 2128 .disconnect = usbnet_disconnect, 2129 .disable_hub_initiated_lpm = 1, 2130 .supports_autosuspend = 1, 2131}; 2132 2133module_usb_driver(smsc95xx_driver); 2134 2135MODULE_AUTHOR("Nancy Lin"); 2136MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2137MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2138MODULE_LICENSE("GPL"); 2139