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 bool pause_rx; 67 bool pause_tx; 68 bool pause_autoneg; 69 spinlock_t mac_cr_lock; 70 u8 features; 71 u8 suspend_flags; 72 bool is_internal_phy; 73 struct irq_chip irqchip; 74 struct irq_domain *irqdomain; 75 struct fwnode_handle *irqfwnode; 76 struct mii_bus *mdiobus; 77 struct phy_device *phydev; 78 struct task_struct *pm_task; 79 }; 80 81 static bool turbo_mode = true; 82 module_param(turbo_mode, bool, 0644); 83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 84 85 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 86 u32 *data) 87 { 88 struct smsc95xx_priv *pdata = dev->driver_priv; 89 u32 buf; 90 int ret; 91 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 92 93 if (current != pdata->pm_task) 94 fn = usbnet_read_cmd; 95 else 96 fn = usbnet_read_cmd_nopm; 97 98 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 99 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 100 0, index, &buf, 4); 101 if (ret < 4) { 102 ret = ret < 0 ? ret : -ENODATA; 103 104 if (ret != -ENODEV) 105 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 106 index, ret); 107 return ret; 108 } 109 110 le32_to_cpus(&buf); 111 *data = buf; 112 113 return ret; 114 } 115 116 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 117 u32 data) 118 { 119 struct smsc95xx_priv *pdata = dev->driver_priv; 120 u32 buf; 121 int ret; 122 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 123 124 if (current != pdata->pm_task) 125 fn = usbnet_write_cmd; 126 else 127 fn = usbnet_write_cmd_nopm; 128 129 buf = data; 130 cpu_to_le32s(&buf); 131 132 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 133 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 134 0, index, &buf, 4); 135 if (ret < 0 && ret != -ENODEV) 136 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 137 index, ret); 138 139 return ret; 140 } 141 142 /* Loop until the read is completed with timeout 143 * called with phy_mutex held */ 144 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) 145 { 146 unsigned long start_time = jiffies; 147 u32 val; 148 int ret; 149 150 do { 151 ret = smsc95xx_read_reg(dev, MII_ADDR, &val); 152 if (ret < 0) { 153 /* Ignore -ENODEV error during disconnect() */ 154 if (ret == -ENODEV) 155 return 0; 156 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 157 return ret; 158 } 159 160 if (!(val & MII_BUSY_)) 161 return 0; 162 } while (!time_after(jiffies, start_time + HZ)); 163 164 return -EIO; 165 } 166 167 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 168 { 169 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 170 } 171 172 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx) 173 { 174 u32 val, addr; 175 int ret; 176 177 mutex_lock(&dev->phy_mutex); 178 179 /* confirm MII not busy */ 180 ret = smsc95xx_phy_wait_not_busy(dev); 181 if (ret < 0) { 182 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 183 goto done; 184 } 185 186 /* set the address, index & direction (read from PHY) */ 187 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 188 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 189 if (ret < 0) { 190 if (ret != -ENODEV) 191 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 192 goto done; 193 } 194 195 ret = smsc95xx_phy_wait_not_busy(dev); 196 if (ret < 0) { 197 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 198 goto done; 199 } 200 201 ret = smsc95xx_read_reg(dev, MII_DATA, &val); 202 if (ret < 0) { 203 if (ret != -ENODEV) 204 netdev_warn(dev->net, "Error reading MII_DATA\n"); 205 goto done; 206 } 207 208 ret = (u16)(val & 0xFFFF); 209 210 done: 211 mutex_unlock(&dev->phy_mutex); 212 213 /* Ignore -ENODEV error during disconnect() */ 214 if (ret == -ENODEV) 215 return 0; 216 return ret; 217 } 218 219 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx, 220 int regval) 221 { 222 u32 val, addr; 223 int ret; 224 225 mutex_lock(&dev->phy_mutex); 226 227 /* confirm MII not busy */ 228 ret = smsc95xx_phy_wait_not_busy(dev); 229 if (ret < 0) { 230 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 231 goto done; 232 } 233 234 val = regval; 235 ret = smsc95xx_write_reg(dev, MII_DATA, val); 236 if (ret < 0) { 237 if (ret != -ENODEV) 238 netdev_warn(dev->net, "Error writing MII_DATA\n"); 239 goto done; 240 } 241 242 /* set the address, index & direction (write to PHY) */ 243 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 244 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 245 if (ret < 0) { 246 if (ret != -ENODEV) 247 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 248 goto done; 249 } 250 251 ret = smsc95xx_phy_wait_not_busy(dev); 252 if (ret < 0) { 253 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 254 goto done; 255 } 256 257 done: 258 mutex_unlock(&dev->phy_mutex); 259 } 260 261 static int smsc95xx_mdiobus_reset(struct mii_bus *bus) 262 { 263 struct smsc95xx_priv *pdata; 264 struct usbnet *dev; 265 u32 val; 266 int ret; 267 268 dev = bus->priv; 269 pdata = dev->driver_priv; 270 271 if (pdata->is_internal_phy) 272 return 0; 273 274 mutex_lock(&dev->phy_mutex); 275 276 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 277 if (ret < 0) 278 goto reset_out; 279 280 val |= PM_CTL_PHY_RST_; 281 282 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 283 if (ret < 0) 284 goto reset_out; 285 286 /* Driver has no knowledge at this point about the external PHY. 287 * The 802.3 specifies that the reset process shall 288 * be completed within 0.5 s. 289 */ 290 fsleep(500000); 291 292 reset_out: 293 mutex_unlock(&dev->phy_mutex); 294 295 return 0; 296 } 297 298 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 299 { 300 struct usbnet *dev = bus->priv; 301 302 return smsc95xx_mdio_read(dev, phy_id, idx); 303 } 304 305 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 306 u16 regval) 307 { 308 struct usbnet *dev = bus->priv; 309 310 smsc95xx_mdio_write(dev, phy_id, idx, regval); 311 return 0; 312 } 313 314 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 315 { 316 unsigned long start_time = jiffies; 317 u32 val; 318 int ret; 319 320 do { 321 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 322 if (ret < 0) { 323 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 324 return ret; 325 } 326 327 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 328 break; 329 udelay(40); 330 } while (!time_after(jiffies, start_time + HZ)); 331 332 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 333 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 334 return -EIO; 335 } 336 337 return 0; 338 } 339 340 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 341 { 342 unsigned long start_time = jiffies; 343 u32 val; 344 int ret; 345 346 do { 347 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 348 if (ret < 0) { 349 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 350 return ret; 351 } 352 353 if (!(val & E2P_CMD_BUSY_)) 354 return 0; 355 356 udelay(40); 357 } while (!time_after(jiffies, start_time + HZ)); 358 359 netdev_warn(dev->net, "EEPROM is busy\n"); 360 return -EIO; 361 } 362 363 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 364 u8 *data) 365 { 366 u32 val; 367 int i, ret; 368 369 BUG_ON(!dev); 370 BUG_ON(!data); 371 372 ret = smsc95xx_eeprom_confirm_not_busy(dev); 373 if (ret) 374 return ret; 375 376 for (i = 0; i < length; i++) { 377 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 378 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 379 if (ret < 0) { 380 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 381 return ret; 382 } 383 384 ret = smsc95xx_wait_eeprom(dev); 385 if (ret < 0) 386 return ret; 387 388 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 389 if (ret < 0) { 390 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 391 return ret; 392 } 393 394 data[i] = val & 0xFF; 395 offset++; 396 } 397 398 return 0; 399 } 400 401 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 402 u8 *data) 403 { 404 u32 val; 405 int i, ret; 406 407 BUG_ON(!dev); 408 BUG_ON(!data); 409 410 ret = smsc95xx_eeprom_confirm_not_busy(dev); 411 if (ret) 412 return ret; 413 414 /* Issue write/erase enable command */ 415 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 416 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 417 if (ret < 0) { 418 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 419 return ret; 420 } 421 422 ret = smsc95xx_wait_eeprom(dev); 423 if (ret < 0) 424 return ret; 425 426 for (i = 0; i < length; i++) { 427 428 /* Fill data register */ 429 val = data[i]; 430 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 431 if (ret < 0) { 432 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 433 return ret; 434 } 435 436 /* Send "write" command */ 437 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 438 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 439 if (ret < 0) { 440 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 441 return ret; 442 } 443 444 ret = smsc95xx_wait_eeprom(dev); 445 if (ret < 0) 446 return ret; 447 448 offset++; 449 } 450 451 return 0; 452 } 453 454 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 455 u32 data) 456 { 457 const u16 size = 4; 458 u32 buf; 459 int ret; 460 461 buf = data; 462 cpu_to_le32s(&buf); 463 464 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 465 USB_DIR_OUT | USB_TYPE_VENDOR | 466 USB_RECIP_DEVICE, 467 0, index, &buf, size); 468 if (ret < 0) 469 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 470 ret); 471 return ret; 472 } 473 474 /* returns hash bit number for given MAC address 475 * example: 476 * 01 00 5E 00 00 01 -> returns bit number 31 */ 477 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 478 { 479 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 480 } 481 482 static void smsc95xx_set_multicast(struct net_device *netdev) 483 { 484 struct usbnet *dev = netdev_priv(netdev); 485 struct smsc95xx_priv *pdata = dev->driver_priv; 486 unsigned long flags; 487 int ret; 488 489 pdata->hash_hi = 0; 490 pdata->hash_lo = 0; 491 492 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 493 494 if (dev->net->flags & IFF_PROMISC) { 495 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 496 pdata->mac_cr |= MAC_CR_PRMS_; 497 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 498 } else if (dev->net->flags & IFF_ALLMULTI) { 499 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 500 pdata->mac_cr |= MAC_CR_MCPAS_; 501 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 502 } else if (!netdev_mc_empty(dev->net)) { 503 struct netdev_hw_addr *ha; 504 505 pdata->mac_cr |= MAC_CR_HPFILT_; 506 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 507 508 netdev_for_each_mc_addr(ha, netdev) { 509 u32 bitnum = smsc95xx_hash(ha->addr); 510 u32 mask = 0x01 << (bitnum & 0x1F); 511 if (bitnum & 0x20) 512 pdata->hash_hi |= mask; 513 else 514 pdata->hash_lo |= mask; 515 } 516 517 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 518 pdata->hash_hi, pdata->hash_lo); 519 } else { 520 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 521 pdata->mac_cr &= 522 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 523 } 524 525 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 526 527 /* Initiate async writes, as we can't wait for completion here */ 528 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 529 if (ret < 0) 530 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 531 532 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 533 if (ret < 0) 534 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 535 536 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 537 if (ret < 0) 538 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 539 } 540 541 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 542 { 543 struct smsc95xx_priv *pdata = dev->driver_priv; 544 u32 flow = 0, afc_cfg; 545 546 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 547 if (ret < 0) 548 return ret; 549 550 if (pdata->phydev->duplex == DUPLEX_FULL) { 551 bool tx_pause, rx_pause; 552 553 if (pdata->phydev->autoneg == AUTONEG_ENABLE && 554 pdata->pause_autoneg) { 555 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 556 } else { 557 tx_pause = pdata->pause_tx; 558 rx_pause = pdata->pause_rx; 559 } 560 561 if (rx_pause) 562 flow = 0xFFFF0002; 563 564 if (tx_pause) { 565 afc_cfg |= 0xF; 566 flow |= 0xFFFF0000; 567 } else { 568 afc_cfg &= ~0xF; 569 } 570 571 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 572 rx_pause ? "enabled" : "disabled", 573 tx_pause ? "enabled" : "disabled"); 574 } else { 575 netif_dbg(dev, link, dev->net, "half duplex\n"); 576 afc_cfg |= 0xF; 577 } 578 579 ret = smsc95xx_write_reg(dev, FLOW, flow); 580 if (ret < 0) 581 return ret; 582 583 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 584 } 585 586 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) 587 { 588 struct smsc95xx_priv *pdata = dev->driver_priv; 589 unsigned long flags; 590 int ret; 591 592 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 593 if (pdata->phydev->duplex != DUPLEX_FULL) { 594 pdata->mac_cr &= ~MAC_CR_FDPX_; 595 pdata->mac_cr |= MAC_CR_RCVOWN_; 596 } else { 597 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 598 pdata->mac_cr |= MAC_CR_FDPX_; 599 } 600 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 601 602 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 603 if (ret < 0) { 604 if (ret != -ENODEV) 605 netdev_warn(dev->net, 606 "Error updating MAC full duplex mode\n"); 607 return; 608 } 609 610 ret = smsc95xx_phy_update_flowcontrol(dev); 611 if (ret < 0) 612 netdev_warn(dev->net, "Error updating PHY flow control\n"); 613 } 614 615 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 616 { 617 struct smsc95xx_priv *pdata = dev->driver_priv; 618 unsigned long flags; 619 u32 intdata; 620 621 if (urb->actual_length != 4) { 622 netdev_warn(dev->net, "unexpected urb length %d\n", 623 urb->actual_length); 624 return; 625 } 626 627 intdata = get_unaligned_le32(urb->transfer_buffer); 628 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 629 630 local_irq_save(flags); 631 632 if (intdata & INT_ENP_PHY_INT_) 633 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ); 634 else 635 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 636 intdata); 637 638 local_irq_restore(flags); 639 } 640 641 /* Enable or disable Tx & Rx checksum offload engines */ 642 static int smsc95xx_set_features(struct net_device *netdev, 643 netdev_features_t features) 644 { 645 struct usbnet *dev = netdev_priv(netdev); 646 u32 read_buf; 647 int ret; 648 649 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 650 if (ret < 0) 651 return ret; 652 653 if (features & NETIF_F_IP_CSUM) 654 read_buf |= Tx_COE_EN_; 655 else 656 read_buf &= ~Tx_COE_EN_; 657 658 if (features & NETIF_F_RXCSUM) 659 read_buf |= Rx_COE_EN_; 660 else 661 read_buf &= ~Rx_COE_EN_; 662 663 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 664 if (ret < 0) 665 return ret; 666 667 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 668 return 0; 669 } 670 671 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 672 { 673 return MAX_EEPROM_SIZE; 674 } 675 676 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 677 struct ethtool_eeprom *ee, u8 *data) 678 { 679 struct usbnet *dev = netdev_priv(netdev); 680 681 ee->magic = LAN95XX_EEPROM_MAGIC; 682 683 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 684 } 685 686 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 687 struct ethtool_eeprom *ee, u8 *data) 688 { 689 struct usbnet *dev = netdev_priv(netdev); 690 691 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 692 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 693 ee->magic); 694 return -EINVAL; 695 } 696 697 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 698 } 699 700 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 701 { 702 /* all smsc95xx registers */ 703 return COE_CR - ID_REV + sizeof(u32); 704 } 705 706 static void 707 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 708 void *buf) 709 { 710 struct usbnet *dev = netdev_priv(netdev); 711 unsigned int i, j; 712 int retval; 713 u32 *data = buf; 714 715 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 716 if (retval < 0) { 717 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 718 return; 719 } 720 721 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 722 retval = smsc95xx_read_reg(dev, i, &data[j]); 723 if (retval < 0) { 724 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 725 return; 726 } 727 } 728 } 729 730 static void smsc95xx_ethtool_get_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; 735 736 wolinfo->supported = SUPPORTED_WAKE; 737 wolinfo->wolopts = pdata->wolopts; 738 } 739 740 static int smsc95xx_ethtool_set_wol(struct net_device *net, 741 struct ethtool_wolinfo *wolinfo) 742 { 743 struct usbnet *dev = netdev_priv(net); 744 struct smsc95xx_priv *pdata = dev->driver_priv; 745 int ret; 746 747 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 748 return -EINVAL; 749 750 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 751 752 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 753 if (ret < 0) 754 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 755 756 return ret; 757 } 758 759 static u32 smsc95xx_get_link(struct net_device *net) 760 { 761 phy_read_status(net->phydev); 762 return net->phydev->link; 763 } 764 765 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, 766 u8 *data) 767 { 768 switch (sset) { 769 case ETH_SS_TEST: 770 net_selftest_get_strings(data); 771 break; 772 } 773 } 774 775 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) 776 { 777 switch (sset) { 778 case ETH_SS_TEST: 779 return net_selftest_get_count(); 780 default: 781 return -EOPNOTSUPP; 782 } 783 } 784 785 static void smsc95xx_get_pauseparam(struct net_device *ndev, 786 struct ethtool_pauseparam *pause) 787 { 788 struct smsc95xx_priv *pdata; 789 struct usbnet *dev; 790 791 dev = netdev_priv(ndev); 792 pdata = dev->driver_priv; 793 794 pause->autoneg = pdata->pause_autoneg; 795 pause->rx_pause = pdata->pause_rx; 796 pause->tx_pause = pdata->pause_tx; 797 } 798 799 static int smsc95xx_set_pauseparam(struct net_device *ndev, 800 struct ethtool_pauseparam *pause) 801 { 802 bool pause_autoneg_rx, pause_autoneg_tx; 803 struct smsc95xx_priv *pdata; 804 struct phy_device *phydev; 805 struct usbnet *dev; 806 807 dev = netdev_priv(ndev); 808 pdata = dev->driver_priv; 809 phydev = ndev->phydev; 810 811 if (!phydev) 812 return -ENODEV; 813 814 pdata->pause_rx = pause->rx_pause; 815 pdata->pause_tx = pause->tx_pause; 816 pdata->pause_autoneg = pause->autoneg; 817 818 if (pause->autoneg) { 819 pause_autoneg_rx = pause->rx_pause; 820 pause_autoneg_tx = pause->tx_pause; 821 } else { 822 pause_autoneg_rx = false; 823 pause_autoneg_tx = false; 824 } 825 826 phy_set_asym_pause(ndev->phydev, pause_autoneg_rx, pause_autoneg_tx); 827 if (phydev->link && (!pause->autoneg || 828 phydev->autoneg == AUTONEG_DISABLE)) 829 smsc95xx_mac_update_fullduplex(dev); 830 831 return 0; 832 } 833 834 static const struct ethtool_ops smsc95xx_ethtool_ops = { 835 .get_link = smsc95xx_get_link, 836 .nway_reset = phy_ethtool_nway_reset, 837 .get_drvinfo = usbnet_get_drvinfo, 838 .get_msglevel = usbnet_get_msglevel, 839 .set_msglevel = usbnet_set_msglevel, 840 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 841 .get_eeprom = smsc95xx_ethtool_get_eeprom, 842 .set_eeprom = smsc95xx_ethtool_set_eeprom, 843 .get_regs_len = smsc95xx_ethtool_getregslen, 844 .get_regs = smsc95xx_ethtool_getregs, 845 .get_wol = smsc95xx_ethtool_get_wol, 846 .set_wol = smsc95xx_ethtool_set_wol, 847 .get_link_ksettings = phy_ethtool_get_link_ksettings, 848 .set_link_ksettings = phy_ethtool_set_link_ksettings, 849 .get_ts_info = ethtool_op_get_ts_info, 850 .self_test = net_selftest, 851 .get_strings = smsc95xx_ethtool_get_strings, 852 .get_sset_count = smsc95xx_ethtool_get_sset_count, 853 .get_pauseparam = smsc95xx_get_pauseparam, 854 .set_pauseparam = smsc95xx_set_pauseparam, 855 }; 856 857 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 858 { 859 if (!netif_running(netdev)) 860 return -EINVAL; 861 862 return phy_mii_ioctl(netdev->phydev, rq, cmd); 863 } 864 865 static void smsc95xx_init_mac_address(struct usbnet *dev) 866 { 867 u8 addr[ETH_ALEN]; 868 869 /* maybe the boot loader passed the MAC address in devicetree */ 870 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 871 if (is_valid_ether_addr(dev->net->dev_addr)) { 872 /* device tree values are valid so use them */ 873 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 874 return; 875 } 876 } 877 878 /* try reading mac address from EEPROM */ 879 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 880 eth_hw_addr_set(dev->net, addr); 881 if (is_valid_ether_addr(dev->net->dev_addr)) { 882 /* eeprom values are valid so use them */ 883 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 884 return; 885 } 886 } 887 888 /* no useful static MAC address found. generate a random one */ 889 eth_hw_addr_random(dev->net); 890 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 891 } 892 893 static int smsc95xx_set_mac_address(struct usbnet *dev) 894 { 895 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 896 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 897 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 898 int ret; 899 900 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 901 if (ret < 0) 902 return ret; 903 904 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 905 } 906 907 /* starts the TX path */ 908 static int smsc95xx_start_tx_path(struct usbnet *dev) 909 { 910 struct smsc95xx_priv *pdata = dev->driver_priv; 911 unsigned long flags; 912 int ret; 913 914 /* Enable Tx at MAC */ 915 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 916 pdata->mac_cr |= MAC_CR_TXEN_; 917 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 918 919 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 920 if (ret < 0) 921 return ret; 922 923 /* Enable Tx at SCSRs */ 924 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 925 } 926 927 /* Starts the Receive path */ 928 static int smsc95xx_start_rx_path(struct usbnet *dev) 929 { 930 struct smsc95xx_priv *pdata = dev->driver_priv; 931 unsigned long flags; 932 933 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 934 pdata->mac_cr |= MAC_CR_RXEN_; 935 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 936 937 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 938 } 939 940 static int smsc95xx_reset(struct usbnet *dev) 941 { 942 struct smsc95xx_priv *pdata = dev->driver_priv; 943 u32 read_buf, burst_cap; 944 int ret = 0, timeout; 945 946 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 947 948 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 949 if (ret < 0) 950 return ret; 951 952 timeout = 0; 953 do { 954 msleep(10); 955 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 956 if (ret < 0) 957 return ret; 958 timeout++; 959 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 960 961 if (timeout >= 100) { 962 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 963 return -ETIMEDOUT; 964 } 965 966 ret = smsc95xx_set_mac_address(dev); 967 if (ret < 0) 968 return ret; 969 970 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 971 dev->net->dev_addr); 972 973 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 974 if (ret < 0) 975 return ret; 976 977 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 978 read_buf); 979 980 read_buf |= HW_CFG_BIR_; 981 982 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 983 if (ret < 0) 984 return ret; 985 986 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 987 if (ret < 0) 988 return ret; 989 990 netif_dbg(dev, ifup, dev->net, 991 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 992 read_buf); 993 994 if (!turbo_mode) { 995 burst_cap = 0; 996 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 997 } else if (dev->udev->speed == USB_SPEED_HIGH) { 998 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 999 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 1000 } else { 1001 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 1002 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 1003 } 1004 1005 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 1006 (ulong)dev->rx_urb_size); 1007 1008 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 1009 if (ret < 0) 1010 return ret; 1011 1012 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 1013 if (ret < 0) 1014 return ret; 1015 1016 netif_dbg(dev, ifup, dev->net, 1017 "Read Value from BURST_CAP after writing: 0x%08x\n", 1018 read_buf); 1019 1020 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1021 if (ret < 0) 1022 return ret; 1023 1024 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 1025 if (ret < 0) 1026 return ret; 1027 1028 netif_dbg(dev, ifup, dev->net, 1029 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 1030 read_buf); 1031 1032 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1033 if (ret < 0) 1034 return ret; 1035 1036 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 1037 read_buf); 1038 1039 if (turbo_mode) 1040 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 1041 1042 read_buf &= ~HW_CFG_RXDOFF_; 1043 1044 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 1045 read_buf |= NET_IP_ALIGN << 9; 1046 1047 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1048 if (ret < 0) 1049 return ret; 1050 1051 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1052 if (ret < 0) 1053 return ret; 1054 1055 netif_dbg(dev, ifup, dev->net, 1056 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 1057 1058 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 1059 if (ret < 0) 1060 return ret; 1061 1062 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1063 if (ret < 0) 1064 return ret; 1065 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1066 1067 ret = smsc95xx_read_reg(dev, LED_GPIO_CFG, &read_buf); 1068 if (ret < 0) 1069 return ret; 1070 /* Configure GPIO pins as LED outputs */ 1071 read_buf |= LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1072 LED_GPIO_CFG_FDX_LED; 1073 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, read_buf); 1074 if (ret < 0) 1075 return ret; 1076 1077 /* Init Tx */ 1078 ret = smsc95xx_write_reg(dev, FLOW, 0); 1079 if (ret < 0) 1080 return ret; 1081 1082 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1083 if (ret < 0) 1084 return ret; 1085 1086 /* Don't need mac_cr_lock during initialisation */ 1087 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1088 if (ret < 0) 1089 return ret; 1090 1091 /* Init Rx */ 1092 /* Set Vlan */ 1093 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1094 if (ret < 0) 1095 return ret; 1096 1097 /* Enable or disable checksum offload engines */ 1098 ret = smsc95xx_set_features(dev->net, dev->net->features); 1099 if (ret < 0) { 1100 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1101 return ret; 1102 } 1103 1104 smsc95xx_set_multicast(dev->net); 1105 1106 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1107 if (ret < 0) 1108 return ret; 1109 1110 /* enable PHY interrupts */ 1111 read_buf |= INT_EP_CTL_PHY_INT_; 1112 1113 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1114 if (ret < 0) 1115 return ret; 1116 1117 ret = smsc95xx_start_tx_path(dev); 1118 if (ret < 0) { 1119 netdev_warn(dev->net, "Failed to start TX path\n"); 1120 return ret; 1121 } 1122 1123 ret = smsc95xx_start_rx_path(dev); 1124 if (ret < 0) { 1125 netdev_warn(dev->net, "Failed to start RX path\n"); 1126 return ret; 1127 } 1128 1129 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1130 return 0; 1131 } 1132 1133 static const struct net_device_ops smsc95xx_netdev_ops = { 1134 .ndo_open = usbnet_open, 1135 .ndo_stop = usbnet_stop, 1136 .ndo_start_xmit = usbnet_start_xmit, 1137 .ndo_tx_timeout = usbnet_tx_timeout, 1138 .ndo_change_mtu = usbnet_change_mtu, 1139 .ndo_get_stats64 = dev_get_tstats64, 1140 .ndo_set_mac_address = eth_mac_addr, 1141 .ndo_validate_addr = eth_validate_addr, 1142 .ndo_eth_ioctl = smsc95xx_ioctl, 1143 .ndo_set_rx_mode = smsc95xx_set_multicast, 1144 .ndo_set_features = smsc95xx_set_features, 1145 }; 1146 1147 static void smsc95xx_handle_link_change(struct net_device *net) 1148 { 1149 struct usbnet *dev = netdev_priv(net); 1150 1151 phy_print_status(net->phydev); 1152 smsc95xx_mac_update_fullduplex(dev); 1153 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1154 } 1155 1156 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1157 { 1158 struct smsc95xx_priv *pdata; 1159 char usb_path[64]; 1160 int ret, phy_irq; 1161 u32 val; 1162 1163 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1164 1165 ret = usbnet_get_endpoints(dev, intf); 1166 if (ret < 0) { 1167 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1168 return ret; 1169 } 1170 1171 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1172 if (!pdata) 1173 return -ENOMEM; 1174 1175 dev->driver_priv = pdata; 1176 1177 spin_lock_init(&pdata->mac_cr_lock); 1178 1179 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1180 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1181 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1182 * it is transmitted as all ones. The zero transmitted checksum means 1183 * transmitter generated no checksum. Hence, enable csum offload only 1184 * for ipv4 packets. 1185 */ 1186 if (DEFAULT_TX_CSUM_ENABLE) 1187 dev->net->features |= NETIF_F_IP_CSUM; 1188 if (DEFAULT_RX_CSUM_ENABLE) 1189 dev->net->features |= NETIF_F_RXCSUM; 1190 1191 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1192 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1193 1194 smsc95xx_init_mac_address(dev); 1195 1196 /* Init all registers */ 1197 ret = smsc95xx_reset(dev); 1198 if (ret) 1199 goto free_pdata; 1200 1201 /* create irq domain for use by PHY driver and GPIO consumers */ 1202 usb_make_path(dev->udev, usb_path, sizeof(usb_path)); 1203 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path); 1204 if (!pdata->irqfwnode) { 1205 ret = -ENOMEM; 1206 goto free_pdata; 1207 } 1208 1209 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode, 1210 SMSC95XX_NR_IRQS, 1211 &irq_domain_simple_ops, 1212 pdata); 1213 if (!pdata->irqdomain) { 1214 ret = -ENOMEM; 1215 goto free_irqfwnode; 1216 } 1217 1218 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ); 1219 if (!phy_irq) { 1220 ret = -ENOENT; 1221 goto remove_irqdomain; 1222 } 1223 1224 pdata->irqchip = dummy_irq_chip; 1225 pdata->irqchip.name = SMSC_CHIPNAME; 1226 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip, 1227 handle_simple_irq, "phy"); 1228 1229 pdata->mdiobus = mdiobus_alloc(); 1230 if (!pdata->mdiobus) { 1231 ret = -ENOMEM; 1232 goto dispose_irq; 1233 } 1234 1235 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1236 if (ret < 0) 1237 goto free_mdio; 1238 1239 pdata->is_internal_phy = !(val & HW_CFG_PSEL_); 1240 if (pdata->is_internal_phy) 1241 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1242 1243 pdata->mdiobus->priv = dev; 1244 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1245 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1246 pdata->mdiobus->reset = smsc95xx_mdiobus_reset; 1247 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1248 pdata->mdiobus->parent = &dev->udev->dev; 1249 1250 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1251 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1252 1253 ret = mdiobus_register(pdata->mdiobus); 1254 if (ret) { 1255 netdev_err(dev->net, "Could not register MDIO bus\n"); 1256 goto free_mdio; 1257 } 1258 1259 pdata->phydev = phy_find_first(pdata->mdiobus); 1260 if (!pdata->phydev) { 1261 netdev_err(dev->net, "no PHY found\n"); 1262 ret = -ENODEV; 1263 goto unregister_mdio; 1264 } 1265 1266 pdata->phydev->irq = phy_irq; 1267 pdata->phydev->is_internal = pdata->is_internal_phy; 1268 1269 /* detect device revision as different features may be available */ 1270 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1271 if (ret < 0) 1272 goto unregister_mdio; 1273 1274 val >>= 16; 1275 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1276 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1277 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1278 FEATURE_PHY_NLP_CROSSOVER | 1279 FEATURE_REMOTE_WAKEUP); 1280 else if (val == ID_REV_CHIP_ID_9512_) 1281 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1282 1283 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1284 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1285 dev->net->flags |= IFF_MULTICAST; 1286 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1287 dev->net->min_mtu = ETH_MIN_MTU; 1288 dev->net->max_mtu = ETH_DATA_LEN; 1289 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1290 1291 pdata->pause_tx = true; 1292 pdata->pause_rx = true; 1293 pdata->pause_autoneg = true; 1294 phy_support_asym_pause(pdata->phydev); 1295 1296 ret = phy_connect_direct(dev->net, pdata->phydev, 1297 &smsc95xx_handle_link_change, 1298 PHY_INTERFACE_MODE_MII); 1299 if (ret) { 1300 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1301 goto unregister_mdio; 1302 } 1303 1304 phy_attached_info(dev->net->phydev); 1305 1306 return 0; 1307 1308 unregister_mdio: 1309 mdiobus_unregister(pdata->mdiobus); 1310 1311 free_mdio: 1312 mdiobus_free(pdata->mdiobus); 1313 1314 dispose_irq: 1315 irq_dispose_mapping(phy_irq); 1316 1317 remove_irqdomain: 1318 irq_domain_remove(pdata->irqdomain); 1319 1320 free_irqfwnode: 1321 irq_domain_free_fwnode(pdata->irqfwnode); 1322 1323 free_pdata: 1324 kfree(pdata); 1325 return ret; 1326 } 1327 1328 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1329 { 1330 struct smsc95xx_priv *pdata = dev->driver_priv; 1331 1332 phy_disconnect(dev->net->phydev); 1333 mdiobus_unregister(pdata->mdiobus); 1334 mdiobus_free(pdata->mdiobus); 1335 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); 1336 irq_domain_remove(pdata->irqdomain); 1337 irq_domain_free_fwnode(pdata->irqfwnode); 1338 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1339 kfree(pdata); 1340 } 1341 1342 static int smsc95xx_start_phy(struct usbnet *dev) 1343 { 1344 phy_start(dev->net->phydev); 1345 1346 return 0; 1347 } 1348 1349 static int smsc95xx_stop(struct usbnet *dev) 1350 { 1351 phy_stop(dev->net->phydev); 1352 1353 return 0; 1354 } 1355 1356 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1357 { 1358 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1359 return crc << ((filter % 2) * 16); 1360 } 1361 1362 static int smsc95xx_link_ok(struct usbnet *dev) 1363 { 1364 struct smsc95xx_priv *pdata = dev->driver_priv; 1365 int ret; 1366 1367 /* first, a dummy read, needed to latch some MII phys */ 1368 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1369 if (ret < 0) 1370 return ret; 1371 1372 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1373 if (ret < 0) 1374 return ret; 1375 1376 return !!(ret & BMSR_LSTATUS); 1377 } 1378 1379 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1380 { 1381 struct smsc95xx_priv *pdata = dev->driver_priv; 1382 u32 val; 1383 int ret; 1384 1385 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1386 if (ret < 0) 1387 return ret; 1388 1389 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1390 val |= PM_CTL_SUS_MODE_0; 1391 1392 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1393 if (ret < 0) 1394 return ret; 1395 1396 /* clear wol status */ 1397 val &= ~PM_CTL_WUPS_; 1398 val |= PM_CTL_WUPS_WOL_; 1399 1400 /* enable energy detection */ 1401 if (pdata->wolopts & WAKE_PHY) 1402 val |= PM_CTL_WUPS_ED_; 1403 1404 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1405 if (ret < 0) 1406 return ret; 1407 1408 /* read back PM_CTRL */ 1409 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1410 if (ret < 0) 1411 return ret; 1412 1413 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1414 1415 return 0; 1416 } 1417 1418 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1419 { 1420 struct smsc95xx_priv *pdata = dev->driver_priv; 1421 int ret, phy_id = pdata->phydev->mdio.addr; 1422 u32 val; 1423 1424 /* reconfigure link pulse detection timing for 1425 * compatibility with non-standard link partners 1426 */ 1427 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1428 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, 1429 PHY_EDPD_CONFIG_DEFAULT); 1430 1431 /* enable energy detect power-down mode */ 1432 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); 1433 if (ret < 0) 1434 return ret; 1435 1436 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1437 1438 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret); 1439 1440 /* enter SUSPEND1 mode */ 1441 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1442 if (ret < 0) 1443 return ret; 1444 1445 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1446 val |= PM_CTL_SUS_MODE_1; 1447 1448 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1449 if (ret < 0) 1450 return ret; 1451 1452 /* clear wol status, enable energy detection */ 1453 val &= ~PM_CTL_WUPS_; 1454 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1455 1456 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1457 if (ret < 0) 1458 return ret; 1459 1460 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1461 1462 return 0; 1463 } 1464 1465 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1466 { 1467 struct smsc95xx_priv *pdata = dev->driver_priv; 1468 u32 val; 1469 int ret; 1470 1471 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1472 if (ret < 0) 1473 return ret; 1474 1475 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1476 val |= PM_CTL_SUS_MODE_2; 1477 1478 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1479 if (ret < 0) 1480 return ret; 1481 1482 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1483 1484 return 0; 1485 } 1486 1487 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1488 { 1489 struct smsc95xx_priv *pdata = dev->driver_priv; 1490 u32 val; 1491 int ret; 1492 1493 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val); 1494 if (ret < 0) 1495 return ret; 1496 1497 if (val & RX_FIFO_INF_USED_) { 1498 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1499 return -EBUSY; 1500 } 1501 1502 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1503 if (ret < 0) 1504 return ret; 1505 1506 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1507 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1508 1509 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1510 if (ret < 0) 1511 return ret; 1512 1513 /* clear wol status */ 1514 val &= ~PM_CTL_WUPS_; 1515 val |= PM_CTL_WUPS_WOL_; 1516 1517 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1518 if (ret < 0) 1519 return ret; 1520 1521 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1522 1523 return 0; 1524 } 1525 1526 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1527 { 1528 struct smsc95xx_priv *pdata = dev->driver_priv; 1529 1530 if (!netif_running(dev->net)) { 1531 /* interface is ifconfig down so fully power down hw */ 1532 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1533 return smsc95xx_enter_suspend2(dev); 1534 } 1535 1536 if (!link_up) { 1537 /* link is down so enter EDPD mode, but only if device can 1538 * reliably resume from it. This check should be redundant 1539 * as current FEATURE_REMOTE_WAKEUP parts also support 1540 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1541 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1542 netdev_warn(dev->net, "EDPD not supported\n"); 1543 return -EBUSY; 1544 } 1545 1546 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1547 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1548 return smsc95xx_enter_suspend1(dev); 1549 } 1550 1551 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1552 return smsc95xx_enter_suspend3(dev); 1553 } 1554 1555 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1556 { 1557 struct usbnet *dev = usb_get_intfdata(intf); 1558 struct smsc95xx_priv *pdata = dev->driver_priv; 1559 u32 val, link_up; 1560 int ret; 1561 1562 pdata->pm_task = current; 1563 1564 ret = usbnet_suspend(intf, message); 1565 if (ret < 0) { 1566 netdev_warn(dev->net, "usbnet_suspend error\n"); 1567 pdata->pm_task = NULL; 1568 return ret; 1569 } 1570 1571 if (pdata->suspend_flags) { 1572 netdev_warn(dev->net, "error during last resume\n"); 1573 pdata->suspend_flags = 0; 1574 } 1575 1576 link_up = smsc95xx_link_ok(dev); 1577 1578 if (message.event == PM_EVENT_AUTO_SUSPEND && 1579 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1580 ret = smsc95xx_autosuspend(dev, link_up); 1581 goto done; 1582 } 1583 1584 /* if we get this far we're not autosuspending */ 1585 /* if no wol options set, or if link is down and we're not waking on 1586 * PHY activity, enter lowest power SUSPEND2 mode 1587 */ 1588 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1589 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1590 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1591 1592 /* disable energy detect (link up) & wake up events */ 1593 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1594 if (ret < 0) 1595 goto done; 1596 1597 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1598 1599 ret = smsc95xx_write_reg(dev, WUCSR, val); 1600 if (ret < 0) 1601 goto done; 1602 1603 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1604 if (ret < 0) 1605 goto done; 1606 1607 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1608 1609 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1610 if (ret < 0) 1611 goto done; 1612 1613 ret = smsc95xx_enter_suspend2(dev); 1614 goto done; 1615 } 1616 1617 if (pdata->wolopts & WAKE_PHY) { 1618 /* if link is down then configure EDPD and enter SUSPEND1, 1619 * otherwise enter SUSPEND0 below 1620 */ 1621 if (!link_up) { 1622 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1623 ret = smsc95xx_enter_suspend1(dev); 1624 goto done; 1625 } 1626 } 1627 1628 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1629 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1630 u32 command[2]; 1631 u32 offset[2]; 1632 u32 crc[4]; 1633 int wuff_filter_count = 1634 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1635 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1636 int i, filter = 0; 1637 1638 if (!filter_mask) { 1639 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1640 ret = -ENOMEM; 1641 goto done; 1642 } 1643 1644 memset(command, 0, sizeof(command)); 1645 memset(offset, 0, sizeof(offset)); 1646 memset(crc, 0, sizeof(crc)); 1647 1648 if (pdata->wolopts & WAKE_BCAST) { 1649 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1650 netdev_info(dev->net, "enabling broadcast detection\n"); 1651 filter_mask[filter * 4] = 0x003F; 1652 filter_mask[filter * 4 + 1] = 0x00; 1653 filter_mask[filter * 4 + 2] = 0x00; 1654 filter_mask[filter * 4 + 3] = 0x00; 1655 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1656 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1657 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1658 filter++; 1659 } 1660 1661 if (pdata->wolopts & WAKE_MCAST) { 1662 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1663 netdev_info(dev->net, "enabling multicast detection\n"); 1664 filter_mask[filter * 4] = 0x0007; 1665 filter_mask[filter * 4 + 1] = 0x00; 1666 filter_mask[filter * 4 + 2] = 0x00; 1667 filter_mask[filter * 4 + 3] = 0x00; 1668 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1669 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1670 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1671 filter++; 1672 } 1673 1674 if (pdata->wolopts & WAKE_ARP) { 1675 const u8 arp[] = {0x08, 0x06}; 1676 netdev_info(dev->net, "enabling ARP detection\n"); 1677 filter_mask[filter * 4] = 0x0003; 1678 filter_mask[filter * 4 + 1] = 0x00; 1679 filter_mask[filter * 4 + 2] = 0x00; 1680 filter_mask[filter * 4 + 3] = 0x00; 1681 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1682 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1683 crc[filter/2] |= smsc_crc(arp, 2, filter); 1684 filter++; 1685 } 1686 1687 if (pdata->wolopts & WAKE_UCAST) { 1688 netdev_info(dev->net, "enabling unicast detection\n"); 1689 filter_mask[filter * 4] = 0x003F; 1690 filter_mask[filter * 4 + 1] = 0x00; 1691 filter_mask[filter * 4 + 2] = 0x00; 1692 filter_mask[filter * 4 + 3] = 0x00; 1693 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1694 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1695 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1696 filter++; 1697 } 1698 1699 for (i = 0; i < (wuff_filter_count * 4); i++) { 1700 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]); 1701 if (ret < 0) { 1702 kfree(filter_mask); 1703 goto done; 1704 } 1705 } 1706 kfree(filter_mask); 1707 1708 for (i = 0; i < (wuff_filter_count / 4); i++) { 1709 ret = smsc95xx_write_reg(dev, WUFF, command[i]); 1710 if (ret < 0) 1711 goto done; 1712 } 1713 1714 for (i = 0; i < (wuff_filter_count / 4); i++) { 1715 ret = smsc95xx_write_reg(dev, WUFF, offset[i]); 1716 if (ret < 0) 1717 goto done; 1718 } 1719 1720 for (i = 0; i < (wuff_filter_count / 2); i++) { 1721 ret = smsc95xx_write_reg(dev, WUFF, crc[i]); 1722 if (ret < 0) 1723 goto done; 1724 } 1725 1726 /* clear any pending pattern match packet status */ 1727 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1728 if (ret < 0) 1729 goto done; 1730 1731 val |= WUCSR_WUFR_; 1732 1733 ret = smsc95xx_write_reg(dev, WUCSR, val); 1734 if (ret < 0) 1735 goto done; 1736 } 1737 1738 if (pdata->wolopts & WAKE_MAGIC) { 1739 /* clear any pending magic packet status */ 1740 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1741 if (ret < 0) 1742 goto done; 1743 1744 val |= WUCSR_MPR_; 1745 1746 ret = smsc95xx_write_reg(dev, WUCSR, val); 1747 if (ret < 0) 1748 goto done; 1749 } 1750 1751 /* enable/disable wakeup sources */ 1752 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1753 if (ret < 0) 1754 goto done; 1755 1756 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1757 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1758 val |= WUCSR_WAKE_EN_; 1759 } else { 1760 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1761 val &= ~WUCSR_WAKE_EN_; 1762 } 1763 1764 if (pdata->wolopts & WAKE_MAGIC) { 1765 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1766 val |= WUCSR_MPEN_; 1767 } else { 1768 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1769 val &= ~WUCSR_MPEN_; 1770 } 1771 1772 ret = smsc95xx_write_reg(dev, WUCSR, val); 1773 if (ret < 0) 1774 goto done; 1775 1776 /* enable wol wakeup source */ 1777 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1778 if (ret < 0) 1779 goto done; 1780 1781 val |= PM_CTL_WOL_EN_; 1782 1783 /* phy energy detect wakeup source */ 1784 if (pdata->wolopts & WAKE_PHY) 1785 val |= PM_CTL_ED_EN_; 1786 1787 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1788 if (ret < 0) 1789 goto done; 1790 1791 /* enable receiver to enable frame reception */ 1792 smsc95xx_start_rx_path(dev); 1793 1794 /* some wol options are enabled, so enter SUSPEND0 */ 1795 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1796 ret = smsc95xx_enter_suspend0(dev); 1797 1798 done: 1799 /* 1800 * TODO: resume() might need to handle the suspend failure 1801 * in system sleep 1802 */ 1803 if (ret && PMSG_IS_AUTO(message)) 1804 usbnet_resume(intf); 1805 1806 pdata->pm_task = NULL; 1807 return ret; 1808 } 1809 1810 static int smsc95xx_resume(struct usb_interface *intf) 1811 { 1812 struct usbnet *dev = usb_get_intfdata(intf); 1813 struct smsc95xx_priv *pdata; 1814 u8 suspend_flags; 1815 int ret; 1816 u32 val; 1817 1818 BUG_ON(!dev); 1819 pdata = dev->driver_priv; 1820 suspend_flags = pdata->suspend_flags; 1821 1822 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1823 1824 /* do this first to ensure it's cleared even in error case */ 1825 pdata->suspend_flags = 0; 1826 1827 pdata->pm_task = current; 1828 1829 if (suspend_flags & SUSPEND_ALLMODES) { 1830 /* clear wake-up sources */ 1831 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1832 if (ret < 0) 1833 goto done; 1834 1835 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1836 1837 ret = smsc95xx_write_reg(dev, WUCSR, val); 1838 if (ret < 0) 1839 goto done; 1840 1841 /* clear wake-up status */ 1842 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1843 if (ret < 0) 1844 goto done; 1845 1846 val &= ~PM_CTL_WOL_EN_; 1847 val |= PM_CTL_WUPS_; 1848 1849 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1850 if (ret < 0) 1851 goto done; 1852 } 1853 1854 phy_init_hw(pdata->phydev); 1855 1856 ret = usbnet_resume(intf); 1857 if (ret < 0) 1858 netdev_warn(dev->net, "usbnet_resume error\n"); 1859 1860 done: 1861 pdata->pm_task = NULL; 1862 return ret; 1863 } 1864 1865 static int smsc95xx_reset_resume(struct usb_interface *intf) 1866 { 1867 struct usbnet *dev = usb_get_intfdata(intf); 1868 struct smsc95xx_priv *pdata = dev->driver_priv; 1869 int ret; 1870 1871 pdata->pm_task = current; 1872 ret = smsc95xx_reset(dev); 1873 pdata->pm_task = NULL; 1874 if (ret < 0) 1875 return ret; 1876 1877 return smsc95xx_resume(intf); 1878 } 1879 1880 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1881 { 1882 u16 *csum_ptr = (u16 *)(skb_tail_pointer(skb) - 2); 1883 1884 skb->csum = (__force __wsum)get_unaligned(csum_ptr); 1885 skb->ip_summed = CHECKSUM_COMPLETE; 1886 skb_trim(skb, skb->len - 2); /* remove csum */ 1887 } 1888 1889 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1890 { 1891 /* This check is no longer done by usbnet */ 1892 if (skb->len < dev->net->hard_header_len) 1893 return 0; 1894 1895 while (skb->len > 0) { 1896 u32 header, align_count; 1897 struct sk_buff *ax_skb; 1898 unsigned char *packet; 1899 u16 size; 1900 1901 header = get_unaligned_le32(skb->data); 1902 skb_pull(skb, 4 + NET_IP_ALIGN); 1903 packet = skb->data; 1904 1905 /* get the packet length */ 1906 size = (u16)((header & RX_STS_FL_) >> 16); 1907 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1908 1909 if (unlikely(size > skb->len)) { 1910 netif_dbg(dev, rx_err, dev->net, 1911 "size err header=0x%08x\n", header); 1912 return 0; 1913 } 1914 1915 if (unlikely(header & RX_STS_ES_)) { 1916 netif_dbg(dev, rx_err, dev->net, 1917 "Error header=0x%08x\n", header); 1918 dev->net->stats.rx_errors++; 1919 dev->net->stats.rx_dropped++; 1920 1921 if (header & RX_STS_CRC_) { 1922 dev->net->stats.rx_crc_errors++; 1923 } else { 1924 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1925 dev->net->stats.rx_frame_errors++; 1926 1927 if ((header & RX_STS_LE_) && 1928 (!(header & RX_STS_FT_))) 1929 dev->net->stats.rx_length_errors++; 1930 } 1931 } else { 1932 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1933 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1934 netif_dbg(dev, rx_err, dev->net, 1935 "size err header=0x%08x\n", header); 1936 return 0; 1937 } 1938 1939 /* last frame in this batch */ 1940 if (skb->len == size) { 1941 if (dev->net->features & NETIF_F_RXCSUM) 1942 smsc95xx_rx_csum_offload(skb); 1943 skb_trim(skb, skb->len - 4); /* remove fcs */ 1944 1945 return 1; 1946 } 1947 1948 ax_skb = netdev_alloc_skb_ip_align(dev->net, size); 1949 if (unlikely(!ax_skb)) { 1950 netdev_warn(dev->net, "Error allocating skb\n"); 1951 return 0; 1952 } 1953 1954 skb_put(ax_skb, size); 1955 memcpy(ax_skb->data, packet, size); 1956 1957 if (dev->net->features & NETIF_F_RXCSUM) 1958 smsc95xx_rx_csum_offload(ax_skb); 1959 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1960 1961 usbnet_skb_return(dev, ax_skb); 1962 } 1963 1964 skb_pull(skb, size); 1965 1966 /* padding bytes before the next frame starts */ 1967 if (skb->len) 1968 skb_pull(skb, align_count); 1969 } 1970 1971 return 1; 1972 } 1973 1974 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1975 { 1976 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1977 u16 high_16 = low_16 + skb->csum_offset; 1978 return (high_16 << 16) | low_16; 1979 } 1980 1981 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1982 * transmission. This is fairly unlikely, only seems to trigger with some 1983 * short TCP ACK packets sent. 1984 * 1985 * Note, this calculation should probably check for the alignment of the 1986 * data as well, but a straight check for csum being in the last four bytes 1987 * of the packet should be ok for now. 1988 */ 1989 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1990 { 1991 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1992 1993 if (skb->len <= 45) 1994 return false; 1995 return skb->csum_offset < (len - (4 + 1)); 1996 } 1997 1998 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1999 struct sk_buff *skb, gfp_t flags) 2000 { 2001 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 2002 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 2003 u32 tx_cmd_a, tx_cmd_b; 2004 void *ptr; 2005 2006 /* We do not advertise SG, so skbs should be already linearized */ 2007 BUG_ON(skb_shinfo(skb)->nr_frags); 2008 2009 /* Make writable and expand header space by overhead if required */ 2010 if (skb_cow_head(skb, overhead)) { 2011 /* Must deallocate here as returning NULL to indicate error 2012 * means the skb won't be deallocated in the caller. 2013 */ 2014 dev_kfree_skb_any(skb); 2015 return NULL; 2016 } 2017 2018 tx_cmd_b = (u32)skb->len; 2019 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 2020 2021 if (csum) { 2022 if (!smsc95xx_can_tx_checksum(skb)) { 2023 /* workaround - hardware tx checksum does not work 2024 * properly with extremely small packets */ 2025 long csstart = skb_checksum_start_offset(skb); 2026 __wsum calc = csum_partial(skb->data + csstart, 2027 skb->len - csstart, 0); 2028 *((__sum16 *)(skb->data + csstart 2029 + skb->csum_offset)) = csum_fold(calc); 2030 2031 csum = false; 2032 } else { 2033 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 2034 ptr = skb_push(skb, 4); 2035 put_unaligned_le32(csum_preamble, ptr); 2036 2037 tx_cmd_a += 4; 2038 tx_cmd_b += 4; 2039 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 2040 } 2041 } 2042 2043 ptr = skb_push(skb, 8); 2044 put_unaligned_le32(tx_cmd_a, ptr); 2045 put_unaligned_le32(tx_cmd_b, ptr+4); 2046 2047 return skb; 2048 } 2049 2050 static int smsc95xx_manage_power(struct usbnet *dev, int on) 2051 { 2052 struct smsc95xx_priv *pdata = dev->driver_priv; 2053 2054 dev->intf->needs_remote_wakeup = on; 2055 2056 if (pdata->features & FEATURE_REMOTE_WAKEUP) 2057 return 0; 2058 2059 /* this chip revision isn't capable of remote wakeup */ 2060 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 2061 2062 if (on) 2063 usb_autopm_get_interface_no_resume(dev->intf); 2064 else 2065 usb_autopm_put_interface(dev->intf); 2066 2067 return 0; 2068 } 2069 2070 static const struct driver_info smsc95xx_info = { 2071 .description = "smsc95xx USB 2.0 Ethernet", 2072 .bind = smsc95xx_bind, 2073 .unbind = smsc95xx_unbind, 2074 .reset = smsc95xx_reset, 2075 .check_connect = smsc95xx_start_phy, 2076 .stop = smsc95xx_stop, 2077 .rx_fixup = smsc95xx_rx_fixup, 2078 .tx_fixup = smsc95xx_tx_fixup, 2079 .status = smsc95xx_status, 2080 .manage_power = smsc95xx_manage_power, 2081 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2082 }; 2083 2084 static const struct usb_device_id products[] = { 2085 { 2086 /* SMSC9500 USB Ethernet Device */ 2087 USB_DEVICE(0x0424, 0x9500), 2088 .driver_info = (unsigned long) &smsc95xx_info, 2089 }, 2090 { 2091 /* SMSC9505 USB Ethernet Device */ 2092 USB_DEVICE(0x0424, 0x9505), 2093 .driver_info = (unsigned long) &smsc95xx_info, 2094 }, 2095 { 2096 /* SMSC9500A USB Ethernet Device */ 2097 USB_DEVICE(0x0424, 0x9E00), 2098 .driver_info = (unsigned long) &smsc95xx_info, 2099 }, 2100 { 2101 /* SMSC9505A USB Ethernet Device */ 2102 USB_DEVICE(0x0424, 0x9E01), 2103 .driver_info = (unsigned long) &smsc95xx_info, 2104 }, 2105 { 2106 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2107 USB_DEVICE(0x0424, 0xec00), 2108 .driver_info = (unsigned long) &smsc95xx_info, 2109 }, 2110 { 2111 /* SMSC9500 USB Ethernet Device (SAL10) */ 2112 USB_DEVICE(0x0424, 0x9900), 2113 .driver_info = (unsigned long) &smsc95xx_info, 2114 }, 2115 { 2116 /* SMSC9505 USB Ethernet Device (SAL10) */ 2117 USB_DEVICE(0x0424, 0x9901), 2118 .driver_info = (unsigned long) &smsc95xx_info, 2119 }, 2120 { 2121 /* SMSC9500A USB Ethernet Device (SAL10) */ 2122 USB_DEVICE(0x0424, 0x9902), 2123 .driver_info = (unsigned long) &smsc95xx_info, 2124 }, 2125 { 2126 /* SMSC9505A USB Ethernet Device (SAL10) */ 2127 USB_DEVICE(0x0424, 0x9903), 2128 .driver_info = (unsigned long) &smsc95xx_info, 2129 }, 2130 { 2131 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2132 USB_DEVICE(0x0424, 0x9904), 2133 .driver_info = (unsigned long) &smsc95xx_info, 2134 }, 2135 { 2136 /* SMSC9500A USB Ethernet Device (HAL) */ 2137 USB_DEVICE(0x0424, 0x9905), 2138 .driver_info = (unsigned long) &smsc95xx_info, 2139 }, 2140 { 2141 /* SMSC9505A USB Ethernet Device (HAL) */ 2142 USB_DEVICE(0x0424, 0x9906), 2143 .driver_info = (unsigned long) &smsc95xx_info, 2144 }, 2145 { 2146 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2147 USB_DEVICE(0x0424, 0x9907), 2148 .driver_info = (unsigned long) &smsc95xx_info, 2149 }, 2150 { 2151 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2152 USB_DEVICE(0x0424, 0x9908), 2153 .driver_info = (unsigned long) &smsc95xx_info, 2154 }, 2155 { 2156 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2157 USB_DEVICE(0x0424, 0x9909), 2158 .driver_info = (unsigned long) &smsc95xx_info, 2159 }, 2160 { 2161 /* SMSC LAN9530 USB Ethernet Device */ 2162 USB_DEVICE(0x0424, 0x9530), 2163 .driver_info = (unsigned long) &smsc95xx_info, 2164 }, 2165 { 2166 /* SMSC LAN9730 USB Ethernet Device */ 2167 USB_DEVICE(0x0424, 0x9730), 2168 .driver_info = (unsigned long) &smsc95xx_info, 2169 }, 2170 { 2171 /* SMSC LAN89530 USB Ethernet Device */ 2172 USB_DEVICE(0x0424, 0x9E08), 2173 .driver_info = (unsigned long) &smsc95xx_info, 2174 }, 2175 { 2176 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */ 2177 USB_DEVICE(0x0878, 0x1400), 2178 .driver_info = (unsigned long)&smsc95xx_info, 2179 }, 2180 { 2181 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ 2182 USB_DEVICE(0x184F, 0x0051), 2183 .driver_info = (unsigned long)&smsc95xx_info, 2184 }, 2185 { }, /* END */ 2186 }; 2187 MODULE_DEVICE_TABLE(usb, products); 2188 2189 static struct usb_driver smsc95xx_driver = { 2190 .name = "smsc95xx", 2191 .id_table = products, 2192 .probe = usbnet_probe, 2193 .suspend = smsc95xx_suspend, 2194 .resume = smsc95xx_resume, 2195 .reset_resume = smsc95xx_reset_resume, 2196 .disconnect = usbnet_disconnect, 2197 .disable_hub_initiated_lpm = 1, 2198 .supports_autosuspend = 1, 2199 }; 2200 2201 module_usb_driver(smsc95xx_driver); 2202 2203 MODULE_AUTHOR("Nancy Lin"); 2204 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2205 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2206 MODULE_LICENSE("GPL"); 2207