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 HS_USB_PKT_SIZE (512) 31 #define FS_USB_PKT_SIZE (64) 32 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) 33 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) 34 #define DEFAULT_BULK_IN_DELAY (0x00002000) 35 #define MAX_SINGLE_PACKET_SIZE (2048) 36 #define LAN95XX_EEPROM_MAGIC (0x9500) 37 #define EEPROM_MAC_OFFSET (0x01) 38 #define DEFAULT_TX_CSUM_ENABLE (true) 39 #define DEFAULT_RX_CSUM_ENABLE (true) 40 #define SMSC95XX_INTERNAL_PHY_ID (1) 41 #define SMSC95XX_TX_OVERHEAD (8) 42 #define SMSC95XX_TX_OVERHEAD_CSUM (12) 43 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ 44 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) 45 46 #define FEATURE_8_WAKEUP_FILTERS (0x01) 47 #define FEATURE_PHY_NLP_CROSSOVER (0x02) 48 #define FEATURE_REMOTE_WAKEUP (0x04) 49 50 #define SUSPEND_SUSPEND0 (0x01) 51 #define SUSPEND_SUSPEND1 (0x02) 52 #define SUSPEND_SUSPEND2 (0x04) 53 #define SUSPEND_SUSPEND3 (0x08) 54 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ 55 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) 56 57 #define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */ 58 #define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1) 59 60 struct smsc95xx_priv { 61 u32 mac_cr; 62 u32 hash_hi; 63 u32 hash_lo; 64 u32 wolopts; 65 bool pause_rx; 66 bool pause_tx; 67 bool pause_autoneg; 68 spinlock_t mac_cr_lock; 69 u8 features; 70 u8 suspend_flags; 71 bool is_internal_phy; 72 struct irq_chip irqchip; 73 struct irq_domain *irqdomain; 74 struct fwnode_handle *irqfwnode; 75 struct mii_bus *mdiobus; 76 struct phy_device *phydev; 77 struct task_struct *pm_task; 78 }; 79 80 static bool turbo_mode = true; 81 module_param(turbo_mode, bool, 0644); 82 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 83 84 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 85 u32 *data) 86 { 87 struct smsc95xx_priv *pdata = dev->driver_priv; 88 u32 buf; 89 int ret; 90 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 91 92 if (current != pdata->pm_task) 93 fn = usbnet_read_cmd; 94 else 95 fn = usbnet_read_cmd_nopm; 96 97 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 98 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 99 0, index, &buf, 4); 100 if (ret < 4) { 101 ret = ret < 0 ? ret : -ENODATA; 102 103 if (ret != -ENODEV) 104 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 105 index, ret); 106 return ret; 107 } 108 109 le32_to_cpus(&buf); 110 *data = buf; 111 112 return ret; 113 } 114 115 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 116 u32 data) 117 { 118 struct smsc95xx_priv *pdata = dev->driver_priv; 119 u32 buf; 120 int ret; 121 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 122 123 if (current != pdata->pm_task) 124 fn = usbnet_write_cmd; 125 else 126 fn = usbnet_write_cmd_nopm; 127 128 buf = data; 129 cpu_to_le32s(&buf); 130 131 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 132 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 133 0, index, &buf, 4); 134 if (ret < 0 && ret != -ENODEV) 135 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 136 index, ret); 137 138 return ret; 139 } 140 141 /* Loop until the read is completed with timeout 142 * called with phy_mutex held */ 143 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) 144 { 145 unsigned long start_time = jiffies; 146 u32 val; 147 int ret; 148 149 do { 150 ret = smsc95xx_read_reg(dev, MII_ADDR, &val); 151 if (ret < 0) { 152 /* Ignore -ENODEV error during disconnect() */ 153 if (ret == -ENODEV) 154 return 0; 155 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 156 return ret; 157 } 158 159 if (!(val & MII_BUSY_)) 160 return 0; 161 } while (!time_after(jiffies, start_time + HZ)); 162 163 return -EIO; 164 } 165 166 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 167 { 168 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 169 } 170 171 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx) 172 { 173 u32 val, addr; 174 int ret; 175 176 mutex_lock(&dev->phy_mutex); 177 178 /* confirm MII not busy */ 179 ret = smsc95xx_phy_wait_not_busy(dev); 180 if (ret < 0) { 181 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 182 goto done; 183 } 184 185 /* set the address, index & direction (read from PHY) */ 186 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 187 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 188 if (ret < 0) { 189 if (ret != -ENODEV) 190 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 191 goto done; 192 } 193 194 ret = smsc95xx_phy_wait_not_busy(dev); 195 if (ret < 0) { 196 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 197 goto done; 198 } 199 200 ret = smsc95xx_read_reg(dev, MII_DATA, &val); 201 if (ret < 0) { 202 if (ret != -ENODEV) 203 netdev_warn(dev->net, "Error reading MII_DATA\n"); 204 goto done; 205 } 206 207 ret = (u16)(val & 0xFFFF); 208 209 done: 210 mutex_unlock(&dev->phy_mutex); 211 212 /* Ignore -ENODEV error during disconnect() */ 213 if (ret == -ENODEV) 214 return 0; 215 return ret; 216 } 217 218 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx, 219 int regval) 220 { 221 u32 val, addr; 222 int ret; 223 224 mutex_lock(&dev->phy_mutex); 225 226 /* confirm MII not busy */ 227 ret = smsc95xx_phy_wait_not_busy(dev); 228 if (ret < 0) { 229 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 230 goto done; 231 } 232 233 val = regval; 234 ret = smsc95xx_write_reg(dev, MII_DATA, val); 235 if (ret < 0) { 236 if (ret != -ENODEV) 237 netdev_warn(dev->net, "Error writing MII_DATA\n"); 238 goto done; 239 } 240 241 /* set the address, index & direction (write to PHY) */ 242 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 243 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 244 if (ret < 0) { 245 if (ret != -ENODEV) 246 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 247 goto done; 248 } 249 250 ret = smsc95xx_phy_wait_not_busy(dev); 251 if (ret < 0) { 252 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 253 goto done; 254 } 255 256 done: 257 mutex_unlock(&dev->phy_mutex); 258 } 259 260 static int smsc95xx_mdiobus_reset(struct mii_bus *bus) 261 { 262 struct smsc95xx_priv *pdata; 263 struct usbnet *dev; 264 u32 val; 265 int ret; 266 267 dev = bus->priv; 268 pdata = dev->driver_priv; 269 270 if (pdata->is_internal_phy) 271 return 0; 272 273 mutex_lock(&dev->phy_mutex); 274 275 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 276 if (ret < 0) 277 goto reset_out; 278 279 val |= PM_CTL_PHY_RST_; 280 281 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 282 if (ret < 0) 283 goto reset_out; 284 285 /* Driver has no knowledge at this point about the external PHY. 286 * The 802.3 specifies that the reset process shall 287 * be completed within 0.5 s. 288 */ 289 fsleep(500000); 290 291 reset_out: 292 mutex_unlock(&dev->phy_mutex); 293 294 return 0; 295 } 296 297 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 298 { 299 struct usbnet *dev = bus->priv; 300 301 return smsc95xx_mdio_read(dev, phy_id, idx); 302 } 303 304 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 305 u16 regval) 306 { 307 struct usbnet *dev = bus->priv; 308 309 smsc95xx_mdio_write(dev, phy_id, idx, regval); 310 return 0; 311 } 312 313 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 314 { 315 unsigned long start_time = jiffies; 316 u32 val; 317 int ret; 318 319 do { 320 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 321 if (ret < 0) { 322 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 323 return ret; 324 } 325 326 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 327 break; 328 udelay(40); 329 } while (!time_after(jiffies, start_time + HZ)); 330 331 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 332 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 333 return -EIO; 334 } 335 336 return 0; 337 } 338 339 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 340 { 341 unsigned long start_time = jiffies; 342 u32 val; 343 int ret; 344 345 do { 346 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 347 if (ret < 0) { 348 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 349 return ret; 350 } 351 352 if (!(val & E2P_CMD_BUSY_)) 353 return 0; 354 355 udelay(40); 356 } while (!time_after(jiffies, start_time + HZ)); 357 358 netdev_warn(dev->net, "EEPROM is busy\n"); 359 return -EIO; 360 } 361 362 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 363 u8 *data) 364 { 365 u32 val; 366 int i, ret; 367 368 BUG_ON(!dev); 369 BUG_ON(!data); 370 371 ret = smsc95xx_eeprom_confirm_not_busy(dev); 372 if (ret) 373 return ret; 374 375 for (i = 0; i < length; i++) { 376 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 377 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 378 if (ret < 0) { 379 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 380 return ret; 381 } 382 383 ret = smsc95xx_wait_eeprom(dev); 384 if (ret < 0) 385 return ret; 386 387 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 388 if (ret < 0) { 389 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 390 return ret; 391 } 392 393 data[i] = val & 0xFF; 394 offset++; 395 } 396 397 return 0; 398 } 399 400 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 401 u8 *data) 402 { 403 u32 val; 404 int i, ret; 405 406 BUG_ON(!dev); 407 BUG_ON(!data); 408 409 ret = smsc95xx_eeprom_confirm_not_busy(dev); 410 if (ret) 411 return ret; 412 413 /* Issue write/erase enable command */ 414 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 415 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 416 if (ret < 0) { 417 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 418 return ret; 419 } 420 421 ret = smsc95xx_wait_eeprom(dev); 422 if (ret < 0) 423 return ret; 424 425 for (i = 0; i < length; i++) { 426 427 /* Fill data register */ 428 val = data[i]; 429 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 430 if (ret < 0) { 431 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 432 return ret; 433 } 434 435 /* Send "write" command */ 436 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 437 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 438 if (ret < 0) { 439 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 440 return ret; 441 } 442 443 ret = smsc95xx_wait_eeprom(dev); 444 if (ret < 0) 445 return ret; 446 447 offset++; 448 } 449 450 return 0; 451 } 452 453 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 454 u32 data) 455 { 456 const u16 size = 4; 457 u32 buf; 458 int ret; 459 460 buf = data; 461 cpu_to_le32s(&buf); 462 463 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 464 USB_DIR_OUT | USB_TYPE_VENDOR | 465 USB_RECIP_DEVICE, 466 0, index, &buf, size); 467 if (ret < 0) 468 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 469 ret); 470 return ret; 471 } 472 473 /* returns hash bit number for given MAC address 474 * example: 475 * 01 00 5E 00 00 01 -> returns bit number 31 */ 476 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 477 { 478 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 479 } 480 481 static void smsc95xx_set_multicast(struct net_device *netdev) 482 { 483 struct usbnet *dev = netdev_priv(netdev); 484 struct smsc95xx_priv *pdata = dev->driver_priv; 485 unsigned long flags; 486 int ret; 487 488 pdata->hash_hi = 0; 489 pdata->hash_lo = 0; 490 491 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 492 493 if (dev->net->flags & IFF_PROMISC) { 494 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 495 pdata->mac_cr |= MAC_CR_PRMS_; 496 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 497 } else if (dev->net->flags & IFF_ALLMULTI) { 498 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 499 pdata->mac_cr |= MAC_CR_MCPAS_; 500 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 501 } else if (!netdev_mc_empty(dev->net)) { 502 struct netdev_hw_addr *ha; 503 504 pdata->mac_cr |= MAC_CR_HPFILT_; 505 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 506 507 netdev_for_each_mc_addr(ha, netdev) { 508 u32 bitnum = smsc95xx_hash(ha->addr); 509 u32 mask = 0x01 << (bitnum & 0x1F); 510 if (bitnum & 0x20) 511 pdata->hash_hi |= mask; 512 else 513 pdata->hash_lo |= mask; 514 } 515 516 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 517 pdata->hash_hi, pdata->hash_lo); 518 } else { 519 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 520 pdata->mac_cr &= 521 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 522 } 523 524 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 525 526 /* Initiate async writes, as we can't wait for completion here */ 527 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 528 if (ret < 0) 529 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 530 531 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 532 if (ret < 0) 533 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 534 535 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 536 if (ret < 0) 537 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 538 } 539 540 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 541 { 542 struct smsc95xx_priv *pdata = dev->driver_priv; 543 u32 flow = 0, afc_cfg; 544 545 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 546 if (ret < 0) 547 return ret; 548 549 if (pdata->phydev->duplex == DUPLEX_FULL) { 550 bool tx_pause, rx_pause; 551 552 if (pdata->phydev->autoneg == AUTONEG_ENABLE && 553 pdata->pause_autoneg) { 554 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 555 } else { 556 tx_pause = pdata->pause_tx; 557 rx_pause = pdata->pause_rx; 558 } 559 560 if (rx_pause) 561 flow = 0xFFFF0002; 562 563 if (tx_pause) { 564 afc_cfg |= 0xF; 565 flow |= 0xFFFF0000; 566 } else { 567 afc_cfg &= ~0xF; 568 } 569 570 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 571 rx_pause ? "enabled" : "disabled", 572 tx_pause ? "enabled" : "disabled"); 573 } else { 574 netif_dbg(dev, link, dev->net, "half duplex\n"); 575 afc_cfg |= 0xF; 576 } 577 578 ret = smsc95xx_write_reg(dev, FLOW, flow); 579 if (ret < 0) 580 return ret; 581 582 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 583 } 584 585 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) 586 { 587 struct smsc95xx_priv *pdata = dev->driver_priv; 588 unsigned long flags; 589 int ret; 590 591 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 592 if (pdata->phydev->duplex != DUPLEX_FULL) { 593 pdata->mac_cr &= ~MAC_CR_FDPX_; 594 pdata->mac_cr |= MAC_CR_RCVOWN_; 595 } else { 596 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 597 pdata->mac_cr |= MAC_CR_FDPX_; 598 } 599 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 600 601 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 602 if (ret < 0) { 603 if (ret != -ENODEV) 604 netdev_warn(dev->net, 605 "Error updating MAC full duplex mode\n"); 606 return; 607 } 608 609 ret = smsc95xx_phy_update_flowcontrol(dev); 610 if (ret < 0) 611 netdev_warn(dev->net, "Error updating PHY flow control\n"); 612 } 613 614 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 615 { 616 struct smsc95xx_priv *pdata = dev->driver_priv; 617 unsigned long flags; 618 u32 intdata; 619 620 if (urb->actual_length != 4) { 621 netdev_warn(dev->net, "unexpected urb length %d\n", 622 urb->actual_length); 623 return; 624 } 625 626 intdata = get_unaligned_le32(urb->transfer_buffer); 627 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 628 629 local_irq_save(flags); 630 631 if (intdata & INT_ENP_PHY_INT_) 632 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ); 633 else 634 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 635 intdata); 636 637 local_irq_restore(flags); 638 } 639 640 /* Enable or disable Tx & Rx checksum offload engines */ 641 static int smsc95xx_set_features(struct net_device *netdev, 642 netdev_features_t features) 643 { 644 struct usbnet *dev = netdev_priv(netdev); 645 u32 read_buf; 646 int ret; 647 648 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 649 if (ret < 0) 650 return ret; 651 652 if (features & NETIF_F_IP_CSUM) 653 read_buf |= Tx_COE_EN_; 654 else 655 read_buf &= ~Tx_COE_EN_; 656 657 if (features & NETIF_F_RXCSUM) 658 read_buf |= Rx_COE_EN_; 659 else 660 read_buf &= ~Rx_COE_EN_; 661 662 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 663 if (ret < 0) 664 return ret; 665 666 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 667 return 0; 668 } 669 670 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 671 { 672 return MAX_EEPROM_SIZE; 673 } 674 675 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 676 struct ethtool_eeprom *ee, u8 *data) 677 { 678 struct usbnet *dev = netdev_priv(netdev); 679 680 ee->magic = LAN95XX_EEPROM_MAGIC; 681 682 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 683 } 684 685 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 686 struct ethtool_eeprom *ee, u8 *data) 687 { 688 struct usbnet *dev = netdev_priv(netdev); 689 690 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 691 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 692 ee->magic); 693 return -EINVAL; 694 } 695 696 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 697 } 698 699 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 700 { 701 /* all smsc95xx registers */ 702 return COE_CR - ID_REV + sizeof(u32); 703 } 704 705 static void 706 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 707 void *buf) 708 { 709 struct usbnet *dev = netdev_priv(netdev); 710 unsigned int i, j; 711 int retval; 712 u32 *data = buf; 713 714 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 715 if (retval < 0) { 716 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 717 return; 718 } 719 720 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 721 retval = smsc95xx_read_reg(dev, i, &data[j]); 722 if (retval < 0) { 723 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 724 return; 725 } 726 } 727 } 728 729 static void smsc95xx_ethtool_get_wol(struct net_device *net, 730 struct ethtool_wolinfo *wolinfo) 731 { 732 struct usbnet *dev = netdev_priv(net); 733 struct smsc95xx_priv *pdata = dev->driver_priv; 734 735 wolinfo->supported = SUPPORTED_WAKE; 736 wolinfo->wolopts = pdata->wolopts; 737 } 738 739 static int smsc95xx_ethtool_set_wol(struct net_device *net, 740 struct ethtool_wolinfo *wolinfo) 741 { 742 struct usbnet *dev = netdev_priv(net); 743 struct smsc95xx_priv *pdata = dev->driver_priv; 744 int ret; 745 746 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 747 return -EINVAL; 748 749 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 750 751 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 752 if (ret < 0) 753 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 754 755 return ret; 756 } 757 758 static u32 smsc95xx_get_link(struct net_device *net) 759 { 760 phy_read_status(net->phydev); 761 return net->phydev->link; 762 } 763 764 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, 765 u8 *data) 766 { 767 switch (sset) { 768 case ETH_SS_TEST: 769 net_selftest_get_strings(data); 770 break; 771 } 772 } 773 774 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) 775 { 776 switch (sset) { 777 case ETH_SS_TEST: 778 return net_selftest_get_count(); 779 default: 780 return -EOPNOTSUPP; 781 } 782 } 783 784 static void smsc95xx_get_pauseparam(struct net_device *ndev, 785 struct ethtool_pauseparam *pause) 786 { 787 struct smsc95xx_priv *pdata; 788 struct usbnet *dev; 789 790 dev = netdev_priv(ndev); 791 pdata = dev->driver_priv; 792 793 pause->autoneg = pdata->pause_autoneg; 794 pause->rx_pause = pdata->pause_rx; 795 pause->tx_pause = pdata->pause_tx; 796 } 797 798 static int smsc95xx_set_pauseparam(struct net_device *ndev, 799 struct ethtool_pauseparam *pause) 800 { 801 bool pause_autoneg_rx, pause_autoneg_tx; 802 struct smsc95xx_priv *pdata; 803 struct phy_device *phydev; 804 struct usbnet *dev; 805 806 dev = netdev_priv(ndev); 807 pdata = dev->driver_priv; 808 phydev = ndev->phydev; 809 810 if (!phydev) 811 return -ENODEV; 812 813 pdata->pause_rx = pause->rx_pause; 814 pdata->pause_tx = pause->tx_pause; 815 pdata->pause_autoneg = pause->autoneg; 816 817 if (pause->autoneg) { 818 pause_autoneg_rx = pause->rx_pause; 819 pause_autoneg_tx = pause->tx_pause; 820 } else { 821 pause_autoneg_rx = false; 822 pause_autoneg_tx = false; 823 } 824 825 phy_set_asym_pause(ndev->phydev, pause_autoneg_rx, pause_autoneg_tx); 826 if (phydev->link && (!pause->autoneg || 827 phydev->autoneg == AUTONEG_DISABLE)) 828 smsc95xx_mac_update_fullduplex(dev); 829 830 return 0; 831 } 832 833 static const struct ethtool_ops smsc95xx_ethtool_ops = { 834 .get_link = smsc95xx_get_link, 835 .nway_reset = phy_ethtool_nway_reset, 836 .get_drvinfo = usbnet_get_drvinfo, 837 .get_msglevel = usbnet_get_msglevel, 838 .set_msglevel = usbnet_set_msglevel, 839 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 840 .get_eeprom = smsc95xx_ethtool_get_eeprom, 841 .set_eeprom = smsc95xx_ethtool_set_eeprom, 842 .get_regs_len = smsc95xx_ethtool_getregslen, 843 .get_regs = smsc95xx_ethtool_getregs, 844 .get_wol = smsc95xx_ethtool_get_wol, 845 .set_wol = smsc95xx_ethtool_set_wol, 846 .get_link_ksettings = phy_ethtool_get_link_ksettings, 847 .set_link_ksettings = phy_ethtool_set_link_ksettings, 848 .get_ts_info = ethtool_op_get_ts_info, 849 .self_test = net_selftest, 850 .get_strings = smsc95xx_ethtool_get_strings, 851 .get_sset_count = smsc95xx_ethtool_get_sset_count, 852 .get_pauseparam = smsc95xx_get_pauseparam, 853 .set_pauseparam = smsc95xx_set_pauseparam, 854 }; 855 856 static void smsc95xx_init_mac_address(struct usbnet *dev) 857 { 858 u8 addr[ETH_ALEN]; 859 860 /* maybe the boot loader passed the MAC address in devicetree */ 861 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 862 if (is_valid_ether_addr(dev->net->dev_addr)) { 863 /* device tree values are valid so use them */ 864 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 865 return; 866 } 867 } 868 869 /* try reading mac address from EEPROM */ 870 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 871 eth_hw_addr_set(dev->net, addr); 872 if (is_valid_ether_addr(dev->net->dev_addr)) { 873 /* eeprom values are valid so use them */ 874 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 875 return; 876 } 877 } 878 879 /* no useful static MAC address found. generate a random one */ 880 eth_hw_addr_random(dev->net); 881 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 882 } 883 884 static int smsc95xx_set_mac_address(struct usbnet *dev) 885 { 886 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 887 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 888 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 889 int ret; 890 891 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 892 if (ret < 0) 893 return ret; 894 895 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 896 } 897 898 /* starts the TX path */ 899 static int smsc95xx_start_tx_path(struct usbnet *dev) 900 { 901 struct smsc95xx_priv *pdata = dev->driver_priv; 902 unsigned long flags; 903 int ret; 904 905 /* Enable Tx at MAC */ 906 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 907 pdata->mac_cr |= MAC_CR_TXEN_; 908 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 909 910 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 911 if (ret < 0) 912 return ret; 913 914 /* Enable Tx at SCSRs */ 915 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 916 } 917 918 /* Starts the Receive path */ 919 static int smsc95xx_start_rx_path(struct usbnet *dev) 920 { 921 struct smsc95xx_priv *pdata = dev->driver_priv; 922 unsigned long flags; 923 924 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 925 pdata->mac_cr |= MAC_CR_RXEN_; 926 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 927 928 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 929 } 930 931 static int smsc95xx_reset(struct usbnet *dev) 932 { 933 struct smsc95xx_priv *pdata = dev->driver_priv; 934 u32 read_buf, burst_cap; 935 int ret = 0, timeout; 936 937 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 938 939 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 940 if (ret < 0) 941 return ret; 942 943 timeout = 0; 944 do { 945 msleep(10); 946 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 947 if (ret < 0) 948 return ret; 949 timeout++; 950 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 951 952 if (timeout >= 100) { 953 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 954 return -ETIMEDOUT; 955 } 956 957 ret = smsc95xx_set_mac_address(dev); 958 if (ret < 0) 959 return ret; 960 961 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 962 dev->net->dev_addr); 963 964 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 965 if (ret < 0) 966 return ret; 967 968 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 969 read_buf); 970 971 read_buf |= HW_CFG_BIR_; 972 973 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 974 if (ret < 0) 975 return ret; 976 977 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 978 if (ret < 0) 979 return ret; 980 981 netif_dbg(dev, ifup, dev->net, 982 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 983 read_buf); 984 985 if (!turbo_mode) { 986 burst_cap = 0; 987 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 988 } else if (dev->udev->speed == USB_SPEED_HIGH) { 989 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 990 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 991 } else { 992 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 993 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 994 } 995 996 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 997 (ulong)dev->rx_urb_size); 998 999 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 1000 if (ret < 0) 1001 return ret; 1002 1003 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 1004 if (ret < 0) 1005 return ret; 1006 1007 netif_dbg(dev, ifup, dev->net, 1008 "Read Value from BURST_CAP after writing: 0x%08x\n", 1009 read_buf); 1010 1011 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1012 if (ret < 0) 1013 return ret; 1014 1015 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 1016 if (ret < 0) 1017 return ret; 1018 1019 netif_dbg(dev, ifup, dev->net, 1020 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 1021 read_buf); 1022 1023 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1024 if (ret < 0) 1025 return ret; 1026 1027 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 1028 read_buf); 1029 1030 if (turbo_mode) 1031 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 1032 1033 read_buf &= ~HW_CFG_RXDOFF_; 1034 1035 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 1036 read_buf |= NET_IP_ALIGN << 9; 1037 1038 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1039 if (ret < 0) 1040 return ret; 1041 1042 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1043 if (ret < 0) 1044 return ret; 1045 1046 netif_dbg(dev, ifup, dev->net, 1047 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 1048 1049 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 1050 if (ret < 0) 1051 return ret; 1052 1053 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1054 if (ret < 0) 1055 return ret; 1056 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1057 1058 ret = smsc95xx_read_reg(dev, LED_GPIO_CFG, &read_buf); 1059 if (ret < 0) 1060 return ret; 1061 /* Configure GPIO pins as LED outputs */ 1062 read_buf |= LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1063 LED_GPIO_CFG_FDX_LED; 1064 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, read_buf); 1065 if (ret < 0) 1066 return ret; 1067 1068 /* Init Tx */ 1069 ret = smsc95xx_write_reg(dev, FLOW, 0); 1070 if (ret < 0) 1071 return ret; 1072 1073 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1074 if (ret < 0) 1075 return ret; 1076 1077 /* Don't need mac_cr_lock during initialisation */ 1078 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1079 if (ret < 0) 1080 return ret; 1081 1082 /* Init Rx */ 1083 /* Set Vlan */ 1084 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1085 if (ret < 0) 1086 return ret; 1087 1088 /* Enable or disable checksum offload engines */ 1089 ret = smsc95xx_set_features(dev->net, dev->net->features); 1090 if (ret < 0) { 1091 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1092 return ret; 1093 } 1094 1095 smsc95xx_set_multicast(dev->net); 1096 1097 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1098 if (ret < 0) 1099 return ret; 1100 1101 /* enable PHY interrupts */ 1102 read_buf |= INT_EP_CTL_PHY_INT_; 1103 1104 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1105 if (ret < 0) 1106 return ret; 1107 1108 ret = smsc95xx_start_tx_path(dev); 1109 if (ret < 0) { 1110 netdev_warn(dev->net, "Failed to start TX path\n"); 1111 return ret; 1112 } 1113 1114 ret = smsc95xx_start_rx_path(dev); 1115 if (ret < 0) { 1116 netdev_warn(dev->net, "Failed to start RX path\n"); 1117 return ret; 1118 } 1119 1120 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1121 return 0; 1122 } 1123 1124 static const struct net_device_ops smsc95xx_netdev_ops = { 1125 .ndo_open = usbnet_open, 1126 .ndo_stop = usbnet_stop, 1127 .ndo_start_xmit = usbnet_start_xmit, 1128 .ndo_tx_timeout = usbnet_tx_timeout, 1129 .ndo_change_mtu = usbnet_change_mtu, 1130 .ndo_get_stats64 = dev_get_tstats64, 1131 .ndo_set_mac_address = eth_mac_addr, 1132 .ndo_validate_addr = eth_validate_addr, 1133 .ndo_eth_ioctl = phy_do_ioctl_running, 1134 .ndo_set_rx_mode = smsc95xx_set_multicast, 1135 .ndo_set_features = smsc95xx_set_features, 1136 }; 1137 1138 static void smsc95xx_handle_link_change(struct net_device *net) 1139 { 1140 struct usbnet *dev = netdev_priv(net); 1141 1142 phy_print_status(net->phydev); 1143 smsc95xx_mac_update_fullduplex(dev); 1144 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1145 } 1146 1147 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1148 { 1149 struct smsc95xx_priv *pdata; 1150 char usb_path[64]; 1151 int ret, phy_irq; 1152 u32 val; 1153 1154 ret = usbnet_get_endpoints(dev, intf); 1155 if (ret < 0) { 1156 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1157 return ret; 1158 } 1159 1160 pdata = kzalloc_obj(*pdata); 1161 if (!pdata) 1162 return -ENOMEM; 1163 1164 dev->driver_priv = pdata; 1165 1166 spin_lock_init(&pdata->mac_cr_lock); 1167 1168 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1169 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1170 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1171 * it is transmitted as all ones. The zero transmitted checksum means 1172 * transmitter generated no checksum. Hence, enable csum offload only 1173 * for ipv4 packets. 1174 */ 1175 if (DEFAULT_TX_CSUM_ENABLE) 1176 dev->net->features |= NETIF_F_IP_CSUM; 1177 if (DEFAULT_RX_CSUM_ENABLE) 1178 dev->net->features |= NETIF_F_RXCSUM; 1179 1180 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1181 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1182 1183 smsc95xx_init_mac_address(dev); 1184 1185 /* Init all registers */ 1186 ret = smsc95xx_reset(dev); 1187 if (ret) 1188 goto free_pdata; 1189 1190 /* create irq domain for use by PHY driver and GPIO consumers */ 1191 usb_make_path(dev->udev, usb_path, sizeof(usb_path)); 1192 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path); 1193 if (!pdata->irqfwnode) { 1194 ret = -ENOMEM; 1195 goto free_pdata; 1196 } 1197 1198 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode, 1199 SMSC95XX_NR_IRQS, 1200 &irq_domain_simple_ops, 1201 pdata); 1202 if (!pdata->irqdomain) { 1203 ret = -ENOMEM; 1204 goto free_irqfwnode; 1205 } 1206 1207 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ); 1208 if (!phy_irq) { 1209 ret = -ENOENT; 1210 goto remove_irqdomain; 1211 } 1212 1213 pdata->irqchip = dummy_irq_chip; 1214 pdata->irqchip.name = SMSC_CHIPNAME; 1215 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip, 1216 handle_simple_irq, "phy"); 1217 1218 pdata->mdiobus = mdiobus_alloc(); 1219 if (!pdata->mdiobus) { 1220 ret = -ENOMEM; 1221 goto dispose_irq; 1222 } 1223 1224 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1225 if (ret < 0) 1226 goto free_mdio; 1227 1228 pdata->is_internal_phy = !(val & HW_CFG_PSEL_); 1229 if (pdata->is_internal_phy) 1230 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1231 1232 pdata->mdiobus->priv = dev; 1233 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1234 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1235 pdata->mdiobus->reset = smsc95xx_mdiobus_reset; 1236 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1237 pdata->mdiobus->parent = &dev->udev->dev; 1238 1239 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1240 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1241 1242 ret = mdiobus_register(pdata->mdiobus); 1243 if (ret) { 1244 netdev_err(dev->net, "Could not register MDIO bus\n"); 1245 goto free_mdio; 1246 } 1247 1248 pdata->phydev = phy_find_first(pdata->mdiobus); 1249 if (!pdata->phydev) { 1250 netdev_err(dev->net, "no PHY found\n"); 1251 ret = -ENODEV; 1252 goto unregister_mdio; 1253 } 1254 1255 pdata->mdiobus->irq[pdata->phydev->mdio.addr] = phy_irq; 1256 pdata->phydev->irq = phy_irq; 1257 pdata->phydev->is_internal = pdata->is_internal_phy; 1258 1259 /* detect device revision as different features may be available */ 1260 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1261 if (ret < 0) 1262 goto unregister_mdio; 1263 1264 val >>= 16; 1265 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1266 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1267 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1268 FEATURE_PHY_NLP_CROSSOVER | 1269 FEATURE_REMOTE_WAKEUP); 1270 else if (val == ID_REV_CHIP_ID_9512_) 1271 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1272 1273 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1274 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1275 dev->net->flags |= IFF_MULTICAST; 1276 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1277 dev->net->min_mtu = ETH_MIN_MTU; 1278 dev->net->max_mtu = ETH_DATA_LEN; 1279 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1280 1281 pdata->pause_tx = true; 1282 pdata->pause_rx = true; 1283 pdata->pause_autoneg = true; 1284 phy_support_asym_pause(pdata->phydev); 1285 1286 ret = phy_connect_direct(dev->net, pdata->phydev, 1287 &smsc95xx_handle_link_change, 1288 PHY_INTERFACE_MODE_MII); 1289 if (ret) { 1290 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1291 goto unregister_mdio; 1292 } 1293 1294 phy_attached_info(dev->net->phydev); 1295 1296 return 0; 1297 1298 unregister_mdio: 1299 mdiobus_unregister(pdata->mdiobus); 1300 1301 free_mdio: 1302 mdiobus_free(pdata->mdiobus); 1303 1304 dispose_irq: 1305 irq_dispose_mapping(phy_irq); 1306 1307 remove_irqdomain: 1308 irq_domain_remove(pdata->irqdomain); 1309 1310 free_irqfwnode: 1311 irq_domain_free_fwnode(pdata->irqfwnode); 1312 1313 free_pdata: 1314 kfree(pdata); 1315 return ret; 1316 } 1317 1318 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1319 { 1320 struct smsc95xx_priv *pdata = dev->driver_priv; 1321 1322 phy_disconnect(dev->net->phydev); 1323 mdiobus_unregister(pdata->mdiobus); 1324 mdiobus_free(pdata->mdiobus); 1325 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); 1326 irq_domain_remove(pdata->irqdomain); 1327 irq_domain_free_fwnode(pdata->irqfwnode); 1328 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1329 kfree(pdata); 1330 } 1331 1332 static int smsc95xx_start_phy(struct usbnet *dev) 1333 { 1334 phy_start(dev->net->phydev); 1335 1336 return 0; 1337 } 1338 1339 static int smsc95xx_stop(struct usbnet *dev) 1340 { 1341 phy_stop(dev->net->phydev); 1342 1343 return 0; 1344 } 1345 1346 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1347 { 1348 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1349 return crc << ((filter % 2) * 16); 1350 } 1351 1352 static int smsc95xx_link_ok(struct usbnet *dev) 1353 { 1354 struct smsc95xx_priv *pdata = dev->driver_priv; 1355 int ret; 1356 1357 /* first, a dummy read, needed to latch some MII phys */ 1358 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1359 if (ret < 0) 1360 return ret; 1361 1362 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1363 if (ret < 0) 1364 return ret; 1365 1366 return !!(ret & BMSR_LSTATUS); 1367 } 1368 1369 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1370 { 1371 struct smsc95xx_priv *pdata = dev->driver_priv; 1372 u32 val; 1373 int ret; 1374 1375 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1376 if (ret < 0) 1377 return ret; 1378 1379 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1380 val |= PM_CTL_SUS_MODE_0; 1381 1382 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1383 if (ret < 0) 1384 return ret; 1385 1386 /* clear wol status */ 1387 val &= ~PM_CTL_WUPS_; 1388 val |= PM_CTL_WUPS_WOL_; 1389 1390 /* enable energy detection */ 1391 if (pdata->wolopts & WAKE_PHY) 1392 val |= PM_CTL_WUPS_ED_; 1393 1394 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1395 if (ret < 0) 1396 return ret; 1397 1398 /* read back PM_CTRL */ 1399 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1400 if (ret < 0) 1401 return ret; 1402 1403 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1404 1405 return 0; 1406 } 1407 1408 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1409 { 1410 struct smsc95xx_priv *pdata = dev->driver_priv; 1411 int ret, phy_id = pdata->phydev->mdio.addr; 1412 u32 val; 1413 1414 /* reconfigure link pulse detection timing for 1415 * compatibility with non-standard link partners 1416 */ 1417 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1418 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, 1419 PHY_EDPD_CONFIG_DEFAULT); 1420 1421 /* enable energy detect power-down mode */ 1422 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); 1423 if (ret < 0) 1424 return ret; 1425 1426 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1427 1428 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret); 1429 1430 /* enter SUSPEND1 mode */ 1431 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1432 if (ret < 0) 1433 return ret; 1434 1435 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1436 val |= PM_CTL_SUS_MODE_1; 1437 1438 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1439 if (ret < 0) 1440 return ret; 1441 1442 /* clear wol status, enable energy detection */ 1443 val &= ~PM_CTL_WUPS_; 1444 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1445 1446 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1447 if (ret < 0) 1448 return ret; 1449 1450 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1451 1452 return 0; 1453 } 1454 1455 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1456 { 1457 struct smsc95xx_priv *pdata = dev->driver_priv; 1458 u32 val; 1459 int ret; 1460 1461 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1462 if (ret < 0) 1463 return ret; 1464 1465 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1466 val |= PM_CTL_SUS_MODE_2; 1467 1468 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1469 if (ret < 0) 1470 return ret; 1471 1472 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1473 1474 return 0; 1475 } 1476 1477 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1478 { 1479 struct smsc95xx_priv *pdata = dev->driver_priv; 1480 u32 val; 1481 int ret; 1482 1483 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val); 1484 if (ret < 0) 1485 return ret; 1486 1487 if (val & RX_FIFO_INF_USED_) { 1488 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1489 return -EBUSY; 1490 } 1491 1492 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1493 if (ret < 0) 1494 return ret; 1495 1496 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1497 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1498 1499 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1500 if (ret < 0) 1501 return ret; 1502 1503 /* clear wol status */ 1504 val &= ~PM_CTL_WUPS_; 1505 val |= PM_CTL_WUPS_WOL_; 1506 1507 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1508 if (ret < 0) 1509 return ret; 1510 1511 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1512 1513 return 0; 1514 } 1515 1516 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1517 { 1518 struct smsc95xx_priv *pdata = dev->driver_priv; 1519 1520 if (!netif_running(dev->net)) { 1521 /* interface is ifconfig down so fully power down hw */ 1522 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1523 return smsc95xx_enter_suspend2(dev); 1524 } 1525 1526 if (!link_up) { 1527 /* link is down so enter EDPD mode, but only if device can 1528 * reliably resume from it. This check should be redundant 1529 * as current FEATURE_REMOTE_WAKEUP parts also support 1530 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1531 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1532 netdev_warn(dev->net, "EDPD not supported\n"); 1533 return -EBUSY; 1534 } 1535 1536 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1537 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1538 return smsc95xx_enter_suspend1(dev); 1539 } 1540 1541 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1542 return smsc95xx_enter_suspend3(dev); 1543 } 1544 1545 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1546 { 1547 struct usbnet *dev = usb_get_intfdata(intf); 1548 struct smsc95xx_priv *pdata = dev->driver_priv; 1549 u32 val, link_up; 1550 int ret; 1551 1552 pdata->pm_task = current; 1553 1554 ret = usbnet_suspend(intf, message); 1555 if (ret < 0) { 1556 netdev_warn(dev->net, "usbnet_suspend error\n"); 1557 pdata->pm_task = NULL; 1558 return ret; 1559 } 1560 1561 if (pdata->suspend_flags) { 1562 netdev_warn(dev->net, "error during last resume\n"); 1563 pdata->suspend_flags = 0; 1564 } 1565 1566 link_up = smsc95xx_link_ok(dev); 1567 1568 if (message.event == PM_EVENT_AUTO_SUSPEND && 1569 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1570 ret = smsc95xx_autosuspend(dev, link_up); 1571 goto done; 1572 } 1573 1574 /* if we get this far we're not autosuspending */ 1575 /* if no wol options set, or if link is down and we're not waking on 1576 * PHY activity, enter lowest power SUSPEND2 mode 1577 */ 1578 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1579 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1580 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1581 1582 /* disable energy detect (link up) & wake up events */ 1583 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1584 if (ret < 0) 1585 goto done; 1586 1587 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1588 1589 ret = smsc95xx_write_reg(dev, WUCSR, val); 1590 if (ret < 0) 1591 goto done; 1592 1593 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1594 if (ret < 0) 1595 goto done; 1596 1597 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1598 1599 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1600 if (ret < 0) 1601 goto done; 1602 1603 ret = smsc95xx_enter_suspend2(dev); 1604 goto done; 1605 } 1606 1607 if (pdata->wolopts & WAKE_PHY) { 1608 /* if link is down then configure EDPD and enter SUSPEND1, 1609 * otherwise enter SUSPEND0 below 1610 */ 1611 if (!link_up) { 1612 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1613 ret = smsc95xx_enter_suspend1(dev); 1614 goto done; 1615 } 1616 } 1617 1618 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1619 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1620 u32 command[2]; 1621 u32 offset[2]; 1622 u32 crc[4]; 1623 int wuff_filter_count = 1624 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1625 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1626 int i, filter = 0; 1627 1628 if (!filter_mask) { 1629 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1630 ret = -ENOMEM; 1631 goto done; 1632 } 1633 1634 memset(command, 0, sizeof(command)); 1635 memset(offset, 0, sizeof(offset)); 1636 memset(crc, 0, sizeof(crc)); 1637 1638 if (pdata->wolopts & WAKE_BCAST) { 1639 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1640 netdev_info(dev->net, "enabling broadcast detection\n"); 1641 filter_mask[filter * 4] = 0x003F; 1642 filter_mask[filter * 4 + 1] = 0x00; 1643 filter_mask[filter * 4 + 2] = 0x00; 1644 filter_mask[filter * 4 + 3] = 0x00; 1645 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1646 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1647 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1648 filter++; 1649 } 1650 1651 if (pdata->wolopts & WAKE_MCAST) { 1652 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1653 netdev_info(dev->net, "enabling multicast detection\n"); 1654 filter_mask[filter * 4] = 0x0007; 1655 filter_mask[filter * 4 + 1] = 0x00; 1656 filter_mask[filter * 4 + 2] = 0x00; 1657 filter_mask[filter * 4 + 3] = 0x00; 1658 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1659 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1660 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1661 filter++; 1662 } 1663 1664 if (pdata->wolopts & WAKE_ARP) { 1665 const u8 arp[] = {0x08, 0x06}; 1666 netdev_info(dev->net, "enabling ARP detection\n"); 1667 filter_mask[filter * 4] = 0x0003; 1668 filter_mask[filter * 4 + 1] = 0x00; 1669 filter_mask[filter * 4 + 2] = 0x00; 1670 filter_mask[filter * 4 + 3] = 0x00; 1671 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1672 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1673 crc[filter/2] |= smsc_crc(arp, 2, filter); 1674 filter++; 1675 } 1676 1677 if (pdata->wolopts & WAKE_UCAST) { 1678 netdev_info(dev->net, "enabling unicast detection\n"); 1679 filter_mask[filter * 4] = 0x003F; 1680 filter_mask[filter * 4 + 1] = 0x00; 1681 filter_mask[filter * 4 + 2] = 0x00; 1682 filter_mask[filter * 4 + 3] = 0x00; 1683 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1684 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1685 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1686 filter++; 1687 } 1688 1689 for (i = 0; i < (wuff_filter_count * 4); i++) { 1690 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]); 1691 if (ret < 0) { 1692 kfree(filter_mask); 1693 goto done; 1694 } 1695 } 1696 kfree(filter_mask); 1697 1698 for (i = 0; i < (wuff_filter_count / 4); i++) { 1699 ret = smsc95xx_write_reg(dev, WUFF, command[i]); 1700 if (ret < 0) 1701 goto done; 1702 } 1703 1704 for (i = 0; i < (wuff_filter_count / 4); i++) { 1705 ret = smsc95xx_write_reg(dev, WUFF, offset[i]); 1706 if (ret < 0) 1707 goto done; 1708 } 1709 1710 for (i = 0; i < (wuff_filter_count / 2); i++) { 1711 ret = smsc95xx_write_reg(dev, WUFF, crc[i]); 1712 if (ret < 0) 1713 goto done; 1714 } 1715 1716 /* clear any pending pattern match packet status */ 1717 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1718 if (ret < 0) 1719 goto done; 1720 1721 val |= WUCSR_WUFR_; 1722 1723 ret = smsc95xx_write_reg(dev, WUCSR, val); 1724 if (ret < 0) 1725 goto done; 1726 } 1727 1728 if (pdata->wolopts & WAKE_MAGIC) { 1729 /* clear any pending magic packet status */ 1730 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1731 if (ret < 0) 1732 goto done; 1733 1734 val |= WUCSR_MPR_; 1735 1736 ret = smsc95xx_write_reg(dev, WUCSR, val); 1737 if (ret < 0) 1738 goto done; 1739 } 1740 1741 /* enable/disable wakeup sources */ 1742 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1743 if (ret < 0) 1744 goto done; 1745 1746 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1747 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1748 val |= WUCSR_WAKE_EN_; 1749 } else { 1750 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1751 val &= ~WUCSR_WAKE_EN_; 1752 } 1753 1754 if (pdata->wolopts & WAKE_MAGIC) { 1755 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1756 val |= WUCSR_MPEN_; 1757 } else { 1758 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1759 val &= ~WUCSR_MPEN_; 1760 } 1761 1762 ret = smsc95xx_write_reg(dev, WUCSR, val); 1763 if (ret < 0) 1764 goto done; 1765 1766 /* enable wol wakeup source */ 1767 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1768 if (ret < 0) 1769 goto done; 1770 1771 val |= PM_CTL_WOL_EN_; 1772 1773 /* phy energy detect wakeup source */ 1774 if (pdata->wolopts & WAKE_PHY) 1775 val |= PM_CTL_ED_EN_; 1776 1777 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1778 if (ret < 0) 1779 goto done; 1780 1781 /* enable receiver to enable frame reception */ 1782 smsc95xx_start_rx_path(dev); 1783 1784 /* some wol options are enabled, so enter SUSPEND0 */ 1785 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1786 ret = smsc95xx_enter_suspend0(dev); 1787 1788 done: 1789 /* 1790 * TODO: resume() might need to handle the suspend failure 1791 * in system sleep 1792 */ 1793 if (ret && PMSG_IS_AUTO(message)) 1794 usbnet_resume(intf); 1795 1796 pdata->pm_task = NULL; 1797 return ret; 1798 } 1799 1800 static int smsc95xx_resume(struct usb_interface *intf) 1801 { 1802 struct usbnet *dev = usb_get_intfdata(intf); 1803 struct smsc95xx_priv *pdata; 1804 u8 suspend_flags; 1805 int ret; 1806 u32 val; 1807 1808 BUG_ON(!dev); 1809 pdata = dev->driver_priv; 1810 suspend_flags = pdata->suspend_flags; 1811 1812 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1813 1814 /* do this first to ensure it's cleared even in error case */ 1815 pdata->suspend_flags = 0; 1816 1817 pdata->pm_task = current; 1818 1819 if (suspend_flags & SUSPEND_ALLMODES) { 1820 /* clear wake-up sources */ 1821 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1822 if (ret < 0) 1823 goto done; 1824 1825 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1826 1827 ret = smsc95xx_write_reg(dev, WUCSR, val); 1828 if (ret < 0) 1829 goto done; 1830 1831 /* clear wake-up status */ 1832 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1833 if (ret < 0) 1834 goto done; 1835 1836 val &= ~PM_CTL_WOL_EN_; 1837 val |= PM_CTL_WUPS_; 1838 1839 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1840 if (ret < 0) 1841 goto done; 1842 } 1843 1844 phy_init_hw(pdata->phydev); 1845 1846 ret = usbnet_resume(intf); 1847 if (ret < 0) 1848 netdev_warn(dev->net, "usbnet_resume error\n"); 1849 1850 done: 1851 pdata->pm_task = NULL; 1852 return ret; 1853 } 1854 1855 static int smsc95xx_reset_resume(struct usb_interface *intf) 1856 { 1857 struct usbnet *dev = usb_get_intfdata(intf); 1858 struct smsc95xx_priv *pdata = dev->driver_priv; 1859 int ret; 1860 1861 pdata->pm_task = current; 1862 ret = smsc95xx_reset(dev); 1863 pdata->pm_task = NULL; 1864 if (ret < 0) 1865 return ret; 1866 1867 return smsc95xx_resume(intf); 1868 } 1869 1870 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1871 { 1872 u16 *csum_ptr = (u16 *)(skb_tail_pointer(skb) - 2); 1873 1874 skb->csum = (__force __wsum)get_unaligned(csum_ptr); 1875 skb->ip_summed = CHECKSUM_COMPLETE; 1876 skb_trim(skb, skb->len - 2); /* remove csum */ 1877 } 1878 1879 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1880 { 1881 /* This check is no longer done by usbnet */ 1882 if (skb->len < dev->net->hard_header_len) 1883 return 0; 1884 1885 while (skb->len > 0) { 1886 u32 header, align_count; 1887 struct sk_buff *ax_skb; 1888 unsigned char *packet; 1889 u16 size; 1890 1891 header = get_unaligned_le32(skb->data); 1892 skb_pull(skb, 4 + NET_IP_ALIGN); 1893 packet = skb->data; 1894 1895 /* get the packet length */ 1896 size = (u16)((header & RX_STS_FL_) >> 16); 1897 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1898 1899 if (unlikely(size > skb->len)) { 1900 netif_dbg(dev, rx_err, dev->net, 1901 "size err header=0x%08x\n", header); 1902 return 0; 1903 } 1904 1905 if (unlikely(header & RX_STS_ES_)) { 1906 netif_dbg(dev, rx_err, dev->net, 1907 "Error header=0x%08x\n", header); 1908 dev->net->stats.rx_errors++; 1909 dev->net->stats.rx_dropped++; 1910 1911 if (header & RX_STS_CRC_) { 1912 dev->net->stats.rx_crc_errors++; 1913 } else { 1914 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1915 dev->net->stats.rx_frame_errors++; 1916 1917 if ((header & RX_STS_LE_) && 1918 (!(header & RX_STS_FT_))) 1919 dev->net->stats.rx_length_errors++; 1920 } 1921 } else { 1922 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1923 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1924 netif_dbg(dev, rx_err, dev->net, 1925 "size err header=0x%08x\n", header); 1926 return 0; 1927 } 1928 1929 /* last frame in this batch */ 1930 if (skb->len == size) { 1931 if (dev->net->features & NETIF_F_RXCSUM) 1932 smsc95xx_rx_csum_offload(skb); 1933 skb_trim(skb, skb->len - 4); /* remove fcs */ 1934 1935 return 1; 1936 } 1937 1938 ax_skb = netdev_alloc_skb_ip_align(dev->net, size); 1939 if (unlikely(!ax_skb)) { 1940 netdev_warn(dev->net, "Error allocating skb\n"); 1941 return 0; 1942 } 1943 1944 skb_put(ax_skb, size); 1945 memcpy(ax_skb->data, packet, size); 1946 1947 if (dev->net->features & NETIF_F_RXCSUM) 1948 smsc95xx_rx_csum_offload(ax_skb); 1949 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1950 1951 usbnet_skb_return(dev, ax_skb); 1952 } 1953 1954 skb_pull(skb, size); 1955 1956 /* padding bytes before the next frame starts */ 1957 if (skb->len) 1958 skb_pull(skb, align_count); 1959 } 1960 1961 return 1; 1962 } 1963 1964 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1965 { 1966 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1967 u16 high_16 = low_16 + skb->csum_offset; 1968 return (high_16 << 16) | low_16; 1969 } 1970 1971 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1972 * transmission. This is fairly unlikely, only seems to trigger with some 1973 * short TCP ACK packets sent. 1974 * 1975 * Note, this calculation should probably check for the alignment of the 1976 * data as well, but a straight check for csum being in the last four bytes 1977 * of the packet should be ok for now. 1978 */ 1979 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1980 { 1981 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1982 1983 if (skb->len <= 45) 1984 return false; 1985 return skb->csum_offset < (len - (4 + 1)); 1986 } 1987 1988 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1989 struct sk_buff *skb, gfp_t flags) 1990 { 1991 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1992 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1993 u32 tx_cmd_a, tx_cmd_b; 1994 void *ptr; 1995 1996 /* We do not advertise SG, so skbs should be already linearized */ 1997 BUG_ON(skb_shinfo(skb)->nr_frags); 1998 1999 /* Make writable and expand header space by overhead if required */ 2000 if (skb_cow_head(skb, overhead)) { 2001 /* Must deallocate here as returning NULL to indicate error 2002 * means the skb won't be deallocated in the caller. 2003 */ 2004 dev_kfree_skb_any(skb); 2005 return NULL; 2006 } 2007 2008 tx_cmd_b = (u32)skb->len; 2009 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 2010 2011 if (csum) { 2012 if (!smsc95xx_can_tx_checksum(skb)) { 2013 /* workaround - hardware tx checksum does not work 2014 * properly with extremely small packets */ 2015 long csstart = skb_checksum_start_offset(skb); 2016 __wsum calc = csum_partial(skb->data + csstart, 2017 skb->len - csstart, 0); 2018 *((__sum16 *)(skb->data + csstart 2019 + skb->csum_offset)) = csum_fold(calc); 2020 2021 csum = false; 2022 } else { 2023 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 2024 ptr = skb_push(skb, 4); 2025 put_unaligned_le32(csum_preamble, ptr); 2026 2027 tx_cmd_a += 4; 2028 tx_cmd_b += 4; 2029 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 2030 } 2031 } 2032 2033 ptr = skb_push(skb, 8); 2034 put_unaligned_le32(tx_cmd_a, ptr); 2035 put_unaligned_le32(tx_cmd_b, ptr+4); 2036 2037 return skb; 2038 } 2039 2040 static int smsc95xx_manage_power(struct usbnet *dev, int on) 2041 { 2042 struct smsc95xx_priv *pdata = dev->driver_priv; 2043 2044 dev->intf->needs_remote_wakeup = on; 2045 2046 if (pdata->features & FEATURE_REMOTE_WAKEUP) 2047 return 0; 2048 2049 /* this chip revision isn't capable of remote wakeup */ 2050 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 2051 2052 if (on) 2053 usb_autopm_get_interface_no_resume(dev->intf); 2054 else 2055 usb_autopm_put_interface(dev->intf); 2056 2057 return 0; 2058 } 2059 2060 static const struct driver_info smsc95xx_info = { 2061 .description = "smsc95xx USB 2.0 Ethernet", 2062 .bind = smsc95xx_bind, 2063 .unbind = smsc95xx_unbind, 2064 .reset = smsc95xx_reset, 2065 .check_connect = smsc95xx_start_phy, 2066 .stop = smsc95xx_stop, 2067 .rx_fixup = smsc95xx_rx_fixup, 2068 .tx_fixup = smsc95xx_tx_fixup, 2069 .status = smsc95xx_status, 2070 .manage_power = smsc95xx_manage_power, 2071 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2072 }; 2073 2074 static const struct usb_device_id products[] = { 2075 { 2076 /* SMSC9500 USB Ethernet Device */ 2077 USB_DEVICE(0x0424, 0x9500), 2078 .driver_info = (unsigned long) &smsc95xx_info, 2079 }, 2080 { 2081 /* SMSC9505 USB Ethernet Device */ 2082 USB_DEVICE(0x0424, 0x9505), 2083 .driver_info = (unsigned long) &smsc95xx_info, 2084 }, 2085 { 2086 /* SMSC9500A USB Ethernet Device */ 2087 USB_DEVICE(0x0424, 0x9E00), 2088 .driver_info = (unsigned long) &smsc95xx_info, 2089 }, 2090 { 2091 /* SMSC9505A USB Ethernet Device */ 2092 USB_DEVICE(0x0424, 0x9E01), 2093 .driver_info = (unsigned long) &smsc95xx_info, 2094 }, 2095 { 2096 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2097 USB_DEVICE(0x0424, 0xec00), 2098 .driver_info = (unsigned long) &smsc95xx_info, 2099 }, 2100 { 2101 /* SMSC9500 USB Ethernet Device (SAL10) */ 2102 USB_DEVICE(0x0424, 0x9900), 2103 .driver_info = (unsigned long) &smsc95xx_info, 2104 }, 2105 { 2106 /* SMSC9505 USB Ethernet Device (SAL10) */ 2107 USB_DEVICE(0x0424, 0x9901), 2108 .driver_info = (unsigned long) &smsc95xx_info, 2109 }, 2110 { 2111 /* SMSC9500A USB Ethernet Device (SAL10) */ 2112 USB_DEVICE(0x0424, 0x9902), 2113 .driver_info = (unsigned long) &smsc95xx_info, 2114 }, 2115 { 2116 /* SMSC9505A USB Ethernet Device (SAL10) */ 2117 USB_DEVICE(0x0424, 0x9903), 2118 .driver_info = (unsigned long) &smsc95xx_info, 2119 }, 2120 { 2121 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2122 USB_DEVICE(0x0424, 0x9904), 2123 .driver_info = (unsigned long) &smsc95xx_info, 2124 }, 2125 { 2126 /* SMSC9500A USB Ethernet Device (HAL) */ 2127 USB_DEVICE(0x0424, 0x9905), 2128 .driver_info = (unsigned long) &smsc95xx_info, 2129 }, 2130 { 2131 /* SMSC9505A USB Ethernet Device (HAL) */ 2132 USB_DEVICE(0x0424, 0x9906), 2133 .driver_info = (unsigned long) &smsc95xx_info, 2134 }, 2135 { 2136 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2137 USB_DEVICE(0x0424, 0x9907), 2138 .driver_info = (unsigned long) &smsc95xx_info, 2139 }, 2140 { 2141 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2142 USB_DEVICE(0x0424, 0x9908), 2143 .driver_info = (unsigned long) &smsc95xx_info, 2144 }, 2145 { 2146 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2147 USB_DEVICE(0x0424, 0x9909), 2148 .driver_info = (unsigned long) &smsc95xx_info, 2149 }, 2150 { 2151 /* SMSC LAN9530 USB Ethernet Device */ 2152 USB_DEVICE(0x0424, 0x9530), 2153 .driver_info = (unsigned long) &smsc95xx_info, 2154 }, 2155 { 2156 /* SMSC LAN9730 USB Ethernet Device */ 2157 USB_DEVICE(0x0424, 0x9730), 2158 .driver_info = (unsigned long) &smsc95xx_info, 2159 }, 2160 { 2161 /* SMSC LAN89530 USB Ethernet Device */ 2162 USB_DEVICE(0x0424, 0x9E08), 2163 .driver_info = (unsigned long) &smsc95xx_info, 2164 }, 2165 { 2166 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */ 2167 USB_DEVICE(0x0878, 0x1400), 2168 .driver_info = (unsigned long)&smsc95xx_info, 2169 }, 2170 { 2171 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ 2172 USB_DEVICE(0x184F, 0x0051), 2173 .driver_info = (unsigned long)&smsc95xx_info, 2174 }, 2175 { }, /* END */ 2176 }; 2177 MODULE_DEVICE_TABLE(usb, products); 2178 2179 static struct usb_driver smsc95xx_driver = { 2180 .name = "smsc95xx", 2181 .id_table = products, 2182 .probe = usbnet_probe, 2183 .suspend = smsc95xx_suspend, 2184 .resume = smsc95xx_resume, 2185 .reset_resume = smsc95xx_reset_resume, 2186 .disconnect = usbnet_disconnect, 2187 .disable_hub_initiated_lpm = 1, 2188 .supports_autosuspend = 1, 2189 }; 2190 2191 module_usb_driver(smsc95xx_driver); 2192 2193 MODULE_AUTHOR("Nancy Lin"); 2194 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2195 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2196 MODULE_LICENSE("GPL"); 2197