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->phydev->irq = phy_irq; 1256 pdata->phydev->is_internal = pdata->is_internal_phy; 1257 1258 /* detect device revision as different features may be available */ 1259 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1260 if (ret < 0) 1261 goto unregister_mdio; 1262 1263 val >>= 16; 1264 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1265 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1266 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1267 FEATURE_PHY_NLP_CROSSOVER | 1268 FEATURE_REMOTE_WAKEUP); 1269 else if (val == ID_REV_CHIP_ID_9512_) 1270 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1271 1272 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1273 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1274 dev->net->flags |= IFF_MULTICAST; 1275 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1276 dev->net->min_mtu = ETH_MIN_MTU; 1277 dev->net->max_mtu = ETH_DATA_LEN; 1278 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1279 1280 pdata->pause_tx = true; 1281 pdata->pause_rx = true; 1282 pdata->pause_autoneg = true; 1283 phy_support_asym_pause(pdata->phydev); 1284 1285 ret = phy_connect_direct(dev->net, pdata->phydev, 1286 &smsc95xx_handle_link_change, 1287 PHY_INTERFACE_MODE_MII); 1288 if (ret) { 1289 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1290 goto unregister_mdio; 1291 } 1292 1293 phy_attached_info(dev->net->phydev); 1294 1295 return 0; 1296 1297 unregister_mdio: 1298 mdiobus_unregister(pdata->mdiobus); 1299 1300 free_mdio: 1301 mdiobus_free(pdata->mdiobus); 1302 1303 dispose_irq: 1304 irq_dispose_mapping(phy_irq); 1305 1306 remove_irqdomain: 1307 irq_domain_remove(pdata->irqdomain); 1308 1309 free_irqfwnode: 1310 irq_domain_free_fwnode(pdata->irqfwnode); 1311 1312 free_pdata: 1313 kfree(pdata); 1314 return ret; 1315 } 1316 1317 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1318 { 1319 struct smsc95xx_priv *pdata = dev->driver_priv; 1320 1321 phy_disconnect(dev->net->phydev); 1322 mdiobus_unregister(pdata->mdiobus); 1323 mdiobus_free(pdata->mdiobus); 1324 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); 1325 irq_domain_remove(pdata->irqdomain); 1326 irq_domain_free_fwnode(pdata->irqfwnode); 1327 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1328 kfree(pdata); 1329 } 1330 1331 static int smsc95xx_start_phy(struct usbnet *dev) 1332 { 1333 phy_start(dev->net->phydev); 1334 1335 return 0; 1336 } 1337 1338 static int smsc95xx_stop(struct usbnet *dev) 1339 { 1340 phy_stop(dev->net->phydev); 1341 1342 return 0; 1343 } 1344 1345 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1346 { 1347 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1348 return crc << ((filter % 2) * 16); 1349 } 1350 1351 static int smsc95xx_link_ok(struct usbnet *dev) 1352 { 1353 struct smsc95xx_priv *pdata = dev->driver_priv; 1354 int ret; 1355 1356 /* first, a dummy read, needed to latch some MII phys */ 1357 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1358 if (ret < 0) 1359 return ret; 1360 1361 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1362 if (ret < 0) 1363 return ret; 1364 1365 return !!(ret & BMSR_LSTATUS); 1366 } 1367 1368 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1369 { 1370 struct smsc95xx_priv *pdata = dev->driver_priv; 1371 u32 val; 1372 int ret; 1373 1374 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1375 if (ret < 0) 1376 return ret; 1377 1378 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1379 val |= PM_CTL_SUS_MODE_0; 1380 1381 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1382 if (ret < 0) 1383 return ret; 1384 1385 /* clear wol status */ 1386 val &= ~PM_CTL_WUPS_; 1387 val |= PM_CTL_WUPS_WOL_; 1388 1389 /* enable energy detection */ 1390 if (pdata->wolopts & WAKE_PHY) 1391 val |= PM_CTL_WUPS_ED_; 1392 1393 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1394 if (ret < 0) 1395 return ret; 1396 1397 /* read back PM_CTRL */ 1398 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1399 if (ret < 0) 1400 return ret; 1401 1402 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1403 1404 return 0; 1405 } 1406 1407 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1408 { 1409 struct smsc95xx_priv *pdata = dev->driver_priv; 1410 int ret, phy_id = pdata->phydev->mdio.addr; 1411 u32 val; 1412 1413 /* reconfigure link pulse detection timing for 1414 * compatibility with non-standard link partners 1415 */ 1416 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1417 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, 1418 PHY_EDPD_CONFIG_DEFAULT); 1419 1420 /* enable energy detect power-down mode */ 1421 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); 1422 if (ret < 0) 1423 return ret; 1424 1425 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1426 1427 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret); 1428 1429 /* enter SUSPEND1 mode */ 1430 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1431 if (ret < 0) 1432 return ret; 1433 1434 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1435 val |= PM_CTL_SUS_MODE_1; 1436 1437 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1438 if (ret < 0) 1439 return ret; 1440 1441 /* clear wol status, enable energy detection */ 1442 val &= ~PM_CTL_WUPS_; 1443 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1444 1445 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1446 if (ret < 0) 1447 return ret; 1448 1449 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1450 1451 return 0; 1452 } 1453 1454 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1455 { 1456 struct smsc95xx_priv *pdata = dev->driver_priv; 1457 u32 val; 1458 int ret; 1459 1460 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1461 if (ret < 0) 1462 return ret; 1463 1464 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1465 val |= PM_CTL_SUS_MODE_2; 1466 1467 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1468 if (ret < 0) 1469 return ret; 1470 1471 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1472 1473 return 0; 1474 } 1475 1476 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1477 { 1478 struct smsc95xx_priv *pdata = dev->driver_priv; 1479 u32 val; 1480 int ret; 1481 1482 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val); 1483 if (ret < 0) 1484 return ret; 1485 1486 if (val & RX_FIFO_INF_USED_) { 1487 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1488 return -EBUSY; 1489 } 1490 1491 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1492 if (ret < 0) 1493 return ret; 1494 1495 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1496 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1497 1498 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1499 if (ret < 0) 1500 return ret; 1501 1502 /* clear wol status */ 1503 val &= ~PM_CTL_WUPS_; 1504 val |= PM_CTL_WUPS_WOL_; 1505 1506 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1507 if (ret < 0) 1508 return ret; 1509 1510 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1511 1512 return 0; 1513 } 1514 1515 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1516 { 1517 struct smsc95xx_priv *pdata = dev->driver_priv; 1518 1519 if (!netif_running(dev->net)) { 1520 /* interface is ifconfig down so fully power down hw */ 1521 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1522 return smsc95xx_enter_suspend2(dev); 1523 } 1524 1525 if (!link_up) { 1526 /* link is down so enter EDPD mode, but only if device can 1527 * reliably resume from it. This check should be redundant 1528 * as current FEATURE_REMOTE_WAKEUP parts also support 1529 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1530 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1531 netdev_warn(dev->net, "EDPD not supported\n"); 1532 return -EBUSY; 1533 } 1534 1535 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1536 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1537 return smsc95xx_enter_suspend1(dev); 1538 } 1539 1540 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1541 return smsc95xx_enter_suspend3(dev); 1542 } 1543 1544 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1545 { 1546 struct usbnet *dev = usb_get_intfdata(intf); 1547 struct smsc95xx_priv *pdata = dev->driver_priv; 1548 u32 val, link_up; 1549 int ret; 1550 1551 pdata->pm_task = current; 1552 1553 ret = usbnet_suspend(intf, message); 1554 if (ret < 0) { 1555 netdev_warn(dev->net, "usbnet_suspend error\n"); 1556 pdata->pm_task = NULL; 1557 return ret; 1558 } 1559 1560 if (pdata->suspend_flags) { 1561 netdev_warn(dev->net, "error during last resume\n"); 1562 pdata->suspend_flags = 0; 1563 } 1564 1565 link_up = smsc95xx_link_ok(dev); 1566 1567 if (message.event == PM_EVENT_AUTO_SUSPEND && 1568 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1569 ret = smsc95xx_autosuspend(dev, link_up); 1570 goto done; 1571 } 1572 1573 /* if we get this far we're not autosuspending */ 1574 /* if no wol options set, or if link is down and we're not waking on 1575 * PHY activity, enter lowest power SUSPEND2 mode 1576 */ 1577 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1578 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1579 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1580 1581 /* disable energy detect (link up) & wake up events */ 1582 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1583 if (ret < 0) 1584 goto done; 1585 1586 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1587 1588 ret = smsc95xx_write_reg(dev, WUCSR, val); 1589 if (ret < 0) 1590 goto done; 1591 1592 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1593 if (ret < 0) 1594 goto done; 1595 1596 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1597 1598 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1599 if (ret < 0) 1600 goto done; 1601 1602 ret = smsc95xx_enter_suspend2(dev); 1603 goto done; 1604 } 1605 1606 if (pdata->wolopts & WAKE_PHY) { 1607 /* if link is down then configure EDPD and enter SUSPEND1, 1608 * otherwise enter SUSPEND0 below 1609 */ 1610 if (!link_up) { 1611 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1612 ret = smsc95xx_enter_suspend1(dev); 1613 goto done; 1614 } 1615 } 1616 1617 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1618 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1619 u32 command[2]; 1620 u32 offset[2]; 1621 u32 crc[4]; 1622 int wuff_filter_count = 1623 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1624 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1625 int i, filter = 0; 1626 1627 if (!filter_mask) { 1628 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1629 ret = -ENOMEM; 1630 goto done; 1631 } 1632 1633 memset(command, 0, sizeof(command)); 1634 memset(offset, 0, sizeof(offset)); 1635 memset(crc, 0, sizeof(crc)); 1636 1637 if (pdata->wolopts & WAKE_BCAST) { 1638 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1639 netdev_info(dev->net, "enabling broadcast detection\n"); 1640 filter_mask[filter * 4] = 0x003F; 1641 filter_mask[filter * 4 + 1] = 0x00; 1642 filter_mask[filter * 4 + 2] = 0x00; 1643 filter_mask[filter * 4 + 3] = 0x00; 1644 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1645 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1646 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1647 filter++; 1648 } 1649 1650 if (pdata->wolopts & WAKE_MCAST) { 1651 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1652 netdev_info(dev->net, "enabling multicast detection\n"); 1653 filter_mask[filter * 4] = 0x0007; 1654 filter_mask[filter * 4 + 1] = 0x00; 1655 filter_mask[filter * 4 + 2] = 0x00; 1656 filter_mask[filter * 4 + 3] = 0x00; 1657 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1658 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1659 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1660 filter++; 1661 } 1662 1663 if (pdata->wolopts & WAKE_ARP) { 1664 const u8 arp[] = {0x08, 0x06}; 1665 netdev_info(dev->net, "enabling ARP detection\n"); 1666 filter_mask[filter * 4] = 0x0003; 1667 filter_mask[filter * 4 + 1] = 0x00; 1668 filter_mask[filter * 4 + 2] = 0x00; 1669 filter_mask[filter * 4 + 3] = 0x00; 1670 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1671 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1672 crc[filter/2] |= smsc_crc(arp, 2, filter); 1673 filter++; 1674 } 1675 1676 if (pdata->wolopts & WAKE_UCAST) { 1677 netdev_info(dev->net, "enabling unicast detection\n"); 1678 filter_mask[filter * 4] = 0x003F; 1679 filter_mask[filter * 4 + 1] = 0x00; 1680 filter_mask[filter * 4 + 2] = 0x00; 1681 filter_mask[filter * 4 + 3] = 0x00; 1682 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1683 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1684 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1685 filter++; 1686 } 1687 1688 for (i = 0; i < (wuff_filter_count * 4); i++) { 1689 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]); 1690 if (ret < 0) { 1691 kfree(filter_mask); 1692 goto done; 1693 } 1694 } 1695 kfree(filter_mask); 1696 1697 for (i = 0; i < (wuff_filter_count / 4); i++) { 1698 ret = smsc95xx_write_reg(dev, WUFF, command[i]); 1699 if (ret < 0) 1700 goto done; 1701 } 1702 1703 for (i = 0; i < (wuff_filter_count / 4); i++) { 1704 ret = smsc95xx_write_reg(dev, WUFF, offset[i]); 1705 if (ret < 0) 1706 goto done; 1707 } 1708 1709 for (i = 0; i < (wuff_filter_count / 2); i++) { 1710 ret = smsc95xx_write_reg(dev, WUFF, crc[i]); 1711 if (ret < 0) 1712 goto done; 1713 } 1714 1715 /* clear any pending pattern match packet status */ 1716 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1717 if (ret < 0) 1718 goto done; 1719 1720 val |= WUCSR_WUFR_; 1721 1722 ret = smsc95xx_write_reg(dev, WUCSR, val); 1723 if (ret < 0) 1724 goto done; 1725 } 1726 1727 if (pdata->wolopts & WAKE_MAGIC) { 1728 /* clear any pending magic packet status */ 1729 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1730 if (ret < 0) 1731 goto done; 1732 1733 val |= WUCSR_MPR_; 1734 1735 ret = smsc95xx_write_reg(dev, WUCSR, val); 1736 if (ret < 0) 1737 goto done; 1738 } 1739 1740 /* enable/disable wakeup sources */ 1741 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1742 if (ret < 0) 1743 goto done; 1744 1745 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1746 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1747 val |= WUCSR_WAKE_EN_; 1748 } else { 1749 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1750 val &= ~WUCSR_WAKE_EN_; 1751 } 1752 1753 if (pdata->wolopts & WAKE_MAGIC) { 1754 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1755 val |= WUCSR_MPEN_; 1756 } else { 1757 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1758 val &= ~WUCSR_MPEN_; 1759 } 1760 1761 ret = smsc95xx_write_reg(dev, WUCSR, val); 1762 if (ret < 0) 1763 goto done; 1764 1765 /* enable wol wakeup source */ 1766 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1767 if (ret < 0) 1768 goto done; 1769 1770 val |= PM_CTL_WOL_EN_; 1771 1772 /* phy energy detect wakeup source */ 1773 if (pdata->wolopts & WAKE_PHY) 1774 val |= PM_CTL_ED_EN_; 1775 1776 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1777 if (ret < 0) 1778 goto done; 1779 1780 /* enable receiver to enable frame reception */ 1781 smsc95xx_start_rx_path(dev); 1782 1783 /* some wol options are enabled, so enter SUSPEND0 */ 1784 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1785 ret = smsc95xx_enter_suspend0(dev); 1786 1787 done: 1788 /* 1789 * TODO: resume() might need to handle the suspend failure 1790 * in system sleep 1791 */ 1792 if (ret && PMSG_IS_AUTO(message)) 1793 usbnet_resume(intf); 1794 1795 pdata->pm_task = NULL; 1796 return ret; 1797 } 1798 1799 static int smsc95xx_resume(struct usb_interface *intf) 1800 { 1801 struct usbnet *dev = usb_get_intfdata(intf); 1802 struct smsc95xx_priv *pdata; 1803 u8 suspend_flags; 1804 int ret; 1805 u32 val; 1806 1807 BUG_ON(!dev); 1808 pdata = dev->driver_priv; 1809 suspend_flags = pdata->suspend_flags; 1810 1811 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1812 1813 /* do this first to ensure it's cleared even in error case */ 1814 pdata->suspend_flags = 0; 1815 1816 pdata->pm_task = current; 1817 1818 if (suspend_flags & SUSPEND_ALLMODES) { 1819 /* clear wake-up sources */ 1820 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1821 if (ret < 0) 1822 goto done; 1823 1824 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1825 1826 ret = smsc95xx_write_reg(dev, WUCSR, val); 1827 if (ret < 0) 1828 goto done; 1829 1830 /* clear wake-up status */ 1831 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1832 if (ret < 0) 1833 goto done; 1834 1835 val &= ~PM_CTL_WOL_EN_; 1836 val |= PM_CTL_WUPS_; 1837 1838 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1839 if (ret < 0) 1840 goto done; 1841 } 1842 1843 phy_init_hw(pdata->phydev); 1844 1845 ret = usbnet_resume(intf); 1846 if (ret < 0) 1847 netdev_warn(dev->net, "usbnet_resume error\n"); 1848 1849 done: 1850 pdata->pm_task = NULL; 1851 return ret; 1852 } 1853 1854 static int smsc95xx_reset_resume(struct usb_interface *intf) 1855 { 1856 struct usbnet *dev = usb_get_intfdata(intf); 1857 struct smsc95xx_priv *pdata = dev->driver_priv; 1858 int ret; 1859 1860 pdata->pm_task = current; 1861 ret = smsc95xx_reset(dev); 1862 pdata->pm_task = NULL; 1863 if (ret < 0) 1864 return ret; 1865 1866 return smsc95xx_resume(intf); 1867 } 1868 1869 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1870 { 1871 u16 *csum_ptr = (u16 *)(skb_tail_pointer(skb) - 2); 1872 1873 skb->csum = (__force __wsum)get_unaligned(csum_ptr); 1874 skb->ip_summed = CHECKSUM_COMPLETE; 1875 skb_trim(skb, skb->len - 2); /* remove csum */ 1876 } 1877 1878 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1879 { 1880 /* This check is no longer done by usbnet */ 1881 if (skb->len < dev->net->hard_header_len) 1882 return 0; 1883 1884 while (skb->len > 0) { 1885 u32 header, align_count; 1886 struct sk_buff *ax_skb; 1887 unsigned char *packet; 1888 u16 size; 1889 1890 header = get_unaligned_le32(skb->data); 1891 skb_pull(skb, 4 + NET_IP_ALIGN); 1892 packet = skb->data; 1893 1894 /* get the packet length */ 1895 size = (u16)((header & RX_STS_FL_) >> 16); 1896 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1897 1898 if (unlikely(size > skb->len)) { 1899 netif_dbg(dev, rx_err, dev->net, 1900 "size err header=0x%08x\n", header); 1901 return 0; 1902 } 1903 1904 if (unlikely(header & RX_STS_ES_)) { 1905 netif_dbg(dev, rx_err, dev->net, 1906 "Error header=0x%08x\n", header); 1907 dev->net->stats.rx_errors++; 1908 dev->net->stats.rx_dropped++; 1909 1910 if (header & RX_STS_CRC_) { 1911 dev->net->stats.rx_crc_errors++; 1912 } else { 1913 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1914 dev->net->stats.rx_frame_errors++; 1915 1916 if ((header & RX_STS_LE_) && 1917 (!(header & RX_STS_FT_))) 1918 dev->net->stats.rx_length_errors++; 1919 } 1920 } else { 1921 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1922 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1923 netif_dbg(dev, rx_err, dev->net, 1924 "size err header=0x%08x\n", header); 1925 return 0; 1926 } 1927 1928 /* last frame in this batch */ 1929 if (skb->len == size) { 1930 if (dev->net->features & NETIF_F_RXCSUM) 1931 smsc95xx_rx_csum_offload(skb); 1932 skb_trim(skb, skb->len - 4); /* remove fcs */ 1933 1934 return 1; 1935 } 1936 1937 ax_skb = netdev_alloc_skb_ip_align(dev->net, size); 1938 if (unlikely(!ax_skb)) { 1939 netdev_warn(dev->net, "Error allocating skb\n"); 1940 return 0; 1941 } 1942 1943 skb_put(ax_skb, size); 1944 memcpy(ax_skb->data, packet, size); 1945 1946 if (dev->net->features & NETIF_F_RXCSUM) 1947 smsc95xx_rx_csum_offload(ax_skb); 1948 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1949 1950 usbnet_skb_return(dev, ax_skb); 1951 } 1952 1953 skb_pull(skb, size); 1954 1955 /* padding bytes before the next frame starts */ 1956 if (skb->len) 1957 skb_pull(skb, align_count); 1958 } 1959 1960 return 1; 1961 } 1962 1963 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1964 { 1965 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1966 u16 high_16 = low_16 + skb->csum_offset; 1967 return (high_16 << 16) | low_16; 1968 } 1969 1970 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1971 * transmission. This is fairly unlikely, only seems to trigger with some 1972 * short TCP ACK packets sent. 1973 * 1974 * Note, this calculation should probably check for the alignment of the 1975 * data as well, but a straight check for csum being in the last four bytes 1976 * of the packet should be ok for now. 1977 */ 1978 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1979 { 1980 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1981 1982 if (skb->len <= 45) 1983 return false; 1984 return skb->csum_offset < (len - (4 + 1)); 1985 } 1986 1987 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1988 struct sk_buff *skb, gfp_t flags) 1989 { 1990 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1991 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1992 u32 tx_cmd_a, tx_cmd_b; 1993 void *ptr; 1994 1995 /* We do not advertise SG, so skbs should be already linearized */ 1996 BUG_ON(skb_shinfo(skb)->nr_frags); 1997 1998 /* Make writable and expand header space by overhead if required */ 1999 if (skb_cow_head(skb, overhead)) { 2000 /* Must deallocate here as returning NULL to indicate error 2001 * means the skb won't be deallocated in the caller. 2002 */ 2003 dev_kfree_skb_any(skb); 2004 return NULL; 2005 } 2006 2007 tx_cmd_b = (u32)skb->len; 2008 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 2009 2010 if (csum) { 2011 if (!smsc95xx_can_tx_checksum(skb)) { 2012 /* workaround - hardware tx checksum does not work 2013 * properly with extremely small packets */ 2014 long csstart = skb_checksum_start_offset(skb); 2015 __wsum calc = csum_partial(skb->data + csstart, 2016 skb->len - csstart, 0); 2017 *((__sum16 *)(skb->data + csstart 2018 + skb->csum_offset)) = csum_fold(calc); 2019 2020 csum = false; 2021 } else { 2022 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 2023 ptr = skb_push(skb, 4); 2024 put_unaligned_le32(csum_preamble, ptr); 2025 2026 tx_cmd_a += 4; 2027 tx_cmd_b += 4; 2028 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 2029 } 2030 } 2031 2032 ptr = skb_push(skb, 8); 2033 put_unaligned_le32(tx_cmd_a, ptr); 2034 put_unaligned_le32(tx_cmd_b, ptr+4); 2035 2036 return skb; 2037 } 2038 2039 static int smsc95xx_manage_power(struct usbnet *dev, int on) 2040 { 2041 struct smsc95xx_priv *pdata = dev->driver_priv; 2042 2043 dev->intf->needs_remote_wakeup = on; 2044 2045 if (pdata->features & FEATURE_REMOTE_WAKEUP) 2046 return 0; 2047 2048 /* this chip revision isn't capable of remote wakeup */ 2049 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 2050 2051 if (on) 2052 usb_autopm_get_interface_no_resume(dev->intf); 2053 else 2054 usb_autopm_put_interface(dev->intf); 2055 2056 return 0; 2057 } 2058 2059 static const struct driver_info smsc95xx_info = { 2060 .description = "smsc95xx USB 2.0 Ethernet", 2061 .bind = smsc95xx_bind, 2062 .unbind = smsc95xx_unbind, 2063 .reset = smsc95xx_reset, 2064 .check_connect = smsc95xx_start_phy, 2065 .stop = smsc95xx_stop, 2066 .rx_fixup = smsc95xx_rx_fixup, 2067 .tx_fixup = smsc95xx_tx_fixup, 2068 .status = smsc95xx_status, 2069 .manage_power = smsc95xx_manage_power, 2070 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2071 }; 2072 2073 static const struct usb_device_id products[] = { 2074 { 2075 /* SMSC9500 USB Ethernet Device */ 2076 USB_DEVICE(0x0424, 0x9500), 2077 .driver_info = (unsigned long) &smsc95xx_info, 2078 }, 2079 { 2080 /* SMSC9505 USB Ethernet Device */ 2081 USB_DEVICE(0x0424, 0x9505), 2082 .driver_info = (unsigned long) &smsc95xx_info, 2083 }, 2084 { 2085 /* SMSC9500A USB Ethernet Device */ 2086 USB_DEVICE(0x0424, 0x9E00), 2087 .driver_info = (unsigned long) &smsc95xx_info, 2088 }, 2089 { 2090 /* SMSC9505A USB Ethernet Device */ 2091 USB_DEVICE(0x0424, 0x9E01), 2092 .driver_info = (unsigned long) &smsc95xx_info, 2093 }, 2094 { 2095 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2096 USB_DEVICE(0x0424, 0xec00), 2097 .driver_info = (unsigned long) &smsc95xx_info, 2098 }, 2099 { 2100 /* SMSC9500 USB Ethernet Device (SAL10) */ 2101 USB_DEVICE(0x0424, 0x9900), 2102 .driver_info = (unsigned long) &smsc95xx_info, 2103 }, 2104 { 2105 /* SMSC9505 USB Ethernet Device (SAL10) */ 2106 USB_DEVICE(0x0424, 0x9901), 2107 .driver_info = (unsigned long) &smsc95xx_info, 2108 }, 2109 { 2110 /* SMSC9500A USB Ethernet Device (SAL10) */ 2111 USB_DEVICE(0x0424, 0x9902), 2112 .driver_info = (unsigned long) &smsc95xx_info, 2113 }, 2114 { 2115 /* SMSC9505A USB Ethernet Device (SAL10) */ 2116 USB_DEVICE(0x0424, 0x9903), 2117 .driver_info = (unsigned long) &smsc95xx_info, 2118 }, 2119 { 2120 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2121 USB_DEVICE(0x0424, 0x9904), 2122 .driver_info = (unsigned long) &smsc95xx_info, 2123 }, 2124 { 2125 /* SMSC9500A USB Ethernet Device (HAL) */ 2126 USB_DEVICE(0x0424, 0x9905), 2127 .driver_info = (unsigned long) &smsc95xx_info, 2128 }, 2129 { 2130 /* SMSC9505A USB Ethernet Device (HAL) */ 2131 USB_DEVICE(0x0424, 0x9906), 2132 .driver_info = (unsigned long) &smsc95xx_info, 2133 }, 2134 { 2135 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2136 USB_DEVICE(0x0424, 0x9907), 2137 .driver_info = (unsigned long) &smsc95xx_info, 2138 }, 2139 { 2140 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2141 USB_DEVICE(0x0424, 0x9908), 2142 .driver_info = (unsigned long) &smsc95xx_info, 2143 }, 2144 { 2145 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2146 USB_DEVICE(0x0424, 0x9909), 2147 .driver_info = (unsigned long) &smsc95xx_info, 2148 }, 2149 { 2150 /* SMSC LAN9530 USB Ethernet Device */ 2151 USB_DEVICE(0x0424, 0x9530), 2152 .driver_info = (unsigned long) &smsc95xx_info, 2153 }, 2154 { 2155 /* SMSC LAN9730 USB Ethernet Device */ 2156 USB_DEVICE(0x0424, 0x9730), 2157 .driver_info = (unsigned long) &smsc95xx_info, 2158 }, 2159 { 2160 /* SMSC LAN89530 USB Ethernet Device */ 2161 USB_DEVICE(0x0424, 0x9E08), 2162 .driver_info = (unsigned long) &smsc95xx_info, 2163 }, 2164 { 2165 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */ 2166 USB_DEVICE(0x0878, 0x1400), 2167 .driver_info = (unsigned long)&smsc95xx_info, 2168 }, 2169 { 2170 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ 2171 USB_DEVICE(0x184F, 0x0051), 2172 .driver_info = (unsigned long)&smsc95xx_info, 2173 }, 2174 { }, /* END */ 2175 }; 2176 MODULE_DEVICE_TABLE(usb, products); 2177 2178 static struct usb_driver smsc95xx_driver = { 2179 .name = "smsc95xx", 2180 .id_table = products, 2181 .probe = usbnet_probe, 2182 .suspend = smsc95xx_suspend, 2183 .resume = smsc95xx_resume, 2184 .reset_resume = smsc95xx_reset_resume, 2185 .disconnect = usbnet_disconnect, 2186 .disable_hub_initiated_lpm = 1, 2187 .supports_autosuspend = 1, 2188 }; 2189 2190 module_usb_driver(smsc95xx_driver); 2191 2192 MODULE_AUTHOR("Nancy Lin"); 2193 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2194 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2195 MODULE_LICENSE("GPL"); 2196