1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /*************************************************************************** 3 * 4 * Copyright (C) 2007-2008 SMSC 5 * 6 *****************************************************************************/ 7 8 #include <linux/module.h> 9 #include <linux/kmod.h> 10 #include <linux/netdevice.h> 11 #include <linux/etherdevice.h> 12 #include <linux/ethtool.h> 13 #include <linux/mii.h> 14 #include <linux/usb.h> 15 #include <linux/bitrev.h> 16 #include <linux/crc16.h> 17 #include <linux/crc32.h> 18 #include <linux/usb/usbnet.h> 19 #include <linux/slab.h> 20 #include <linux/of_net.h> 21 #include <linux/irq.h> 22 #include <linux/irqdomain.h> 23 #include <linux/mdio.h> 24 #include <linux/phy.h> 25 #include <net/selftests.h> 26 27 #include "smsc95xx.h" 28 29 #define SMSC_CHIPNAME "smsc95xx" 30 #define SMSC_DRIVER_VERSION "2.0.0" 31 #define HS_USB_PKT_SIZE (512) 32 #define FS_USB_PKT_SIZE (64) 33 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) 34 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) 35 #define DEFAULT_BULK_IN_DELAY (0x00002000) 36 #define MAX_SINGLE_PACKET_SIZE (2048) 37 #define LAN95XX_EEPROM_MAGIC (0x9500) 38 #define EEPROM_MAC_OFFSET (0x01) 39 #define DEFAULT_TX_CSUM_ENABLE (true) 40 #define DEFAULT_RX_CSUM_ENABLE (true) 41 #define SMSC95XX_INTERNAL_PHY_ID (1) 42 #define SMSC95XX_TX_OVERHEAD (8) 43 #define SMSC95XX_TX_OVERHEAD_CSUM (12) 44 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ 45 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) 46 47 #define FEATURE_8_WAKEUP_FILTERS (0x01) 48 #define FEATURE_PHY_NLP_CROSSOVER (0x02) 49 #define FEATURE_REMOTE_WAKEUP (0x04) 50 51 #define SUSPEND_SUSPEND0 (0x01) 52 #define SUSPEND_SUSPEND1 (0x02) 53 #define SUSPEND_SUSPEND2 (0x04) 54 #define SUSPEND_SUSPEND3 (0x08) 55 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ 56 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) 57 58 #define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */ 59 #define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1) 60 61 struct smsc95xx_priv { 62 u32 mac_cr; 63 u32 hash_hi; 64 u32 hash_lo; 65 u32 wolopts; 66 spinlock_t mac_cr_lock; 67 u8 features; 68 u8 suspend_flags; 69 bool is_internal_phy; 70 struct irq_chip irqchip; 71 struct irq_domain *irqdomain; 72 struct fwnode_handle *irqfwnode; 73 struct mii_bus *mdiobus; 74 struct phy_device *phydev; 75 struct task_struct *pm_task; 76 }; 77 78 static bool turbo_mode = true; 79 module_param(turbo_mode, bool, 0644); 80 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 81 82 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 83 u32 *data) 84 { 85 struct smsc95xx_priv *pdata = dev->driver_priv; 86 u32 buf; 87 int ret; 88 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 89 90 if (current != pdata->pm_task) 91 fn = usbnet_read_cmd; 92 else 93 fn = usbnet_read_cmd_nopm; 94 95 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 96 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 97 0, index, &buf, 4); 98 if (ret < 4) { 99 ret = ret < 0 ? ret : -ENODATA; 100 101 if (ret != -ENODEV) 102 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 103 index, ret); 104 return ret; 105 } 106 107 le32_to_cpus(&buf); 108 *data = buf; 109 110 return ret; 111 } 112 113 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 114 u32 data) 115 { 116 struct smsc95xx_priv *pdata = dev->driver_priv; 117 u32 buf; 118 int ret; 119 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 120 121 if (current != pdata->pm_task) 122 fn = usbnet_write_cmd; 123 else 124 fn = usbnet_write_cmd_nopm; 125 126 buf = data; 127 cpu_to_le32s(&buf); 128 129 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 130 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 131 0, index, &buf, 4); 132 if (ret < 0 && ret != -ENODEV) 133 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 134 index, ret); 135 136 return ret; 137 } 138 139 /* Loop until the read is completed with timeout 140 * called with phy_mutex held */ 141 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) 142 { 143 unsigned long start_time = jiffies; 144 u32 val; 145 int ret; 146 147 do { 148 ret = smsc95xx_read_reg(dev, MII_ADDR, &val); 149 if (ret < 0) { 150 /* Ignore -ENODEV error during disconnect() */ 151 if (ret == -ENODEV) 152 return 0; 153 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 154 return ret; 155 } 156 157 if (!(val & MII_BUSY_)) 158 return 0; 159 } while (!time_after(jiffies, start_time + HZ)); 160 161 return -EIO; 162 } 163 164 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 165 { 166 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 167 } 168 169 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx) 170 { 171 u32 val, addr; 172 int ret; 173 174 mutex_lock(&dev->phy_mutex); 175 176 /* confirm MII not busy */ 177 ret = smsc95xx_phy_wait_not_busy(dev); 178 if (ret < 0) { 179 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 180 goto done; 181 } 182 183 /* set the address, index & direction (read from PHY) */ 184 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 185 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 186 if (ret < 0) { 187 if (ret != -ENODEV) 188 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 189 goto done; 190 } 191 192 ret = smsc95xx_phy_wait_not_busy(dev); 193 if (ret < 0) { 194 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 195 goto done; 196 } 197 198 ret = smsc95xx_read_reg(dev, MII_DATA, &val); 199 if (ret < 0) { 200 if (ret != -ENODEV) 201 netdev_warn(dev->net, "Error reading MII_DATA\n"); 202 goto done; 203 } 204 205 ret = (u16)(val & 0xFFFF); 206 207 done: 208 mutex_unlock(&dev->phy_mutex); 209 210 /* Ignore -ENODEV error during disconnect() */ 211 if (ret == -ENODEV) 212 return 0; 213 return ret; 214 } 215 216 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx, 217 int regval) 218 { 219 u32 val, addr; 220 int ret; 221 222 mutex_lock(&dev->phy_mutex); 223 224 /* confirm MII not busy */ 225 ret = smsc95xx_phy_wait_not_busy(dev); 226 if (ret < 0) { 227 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 228 goto done; 229 } 230 231 val = regval; 232 ret = smsc95xx_write_reg(dev, MII_DATA, val); 233 if (ret < 0) { 234 if (ret != -ENODEV) 235 netdev_warn(dev->net, "Error writing MII_DATA\n"); 236 goto done; 237 } 238 239 /* set the address, index & direction (write to PHY) */ 240 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 241 ret = smsc95xx_write_reg(dev, MII_ADDR, addr); 242 if (ret < 0) { 243 if (ret != -ENODEV) 244 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 245 goto done; 246 } 247 248 ret = smsc95xx_phy_wait_not_busy(dev); 249 if (ret < 0) { 250 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 251 goto done; 252 } 253 254 done: 255 mutex_unlock(&dev->phy_mutex); 256 } 257 258 static int smsc95xx_mdiobus_reset(struct mii_bus *bus) 259 { 260 struct smsc95xx_priv *pdata; 261 struct usbnet *dev; 262 u32 val; 263 int ret; 264 265 dev = bus->priv; 266 pdata = dev->driver_priv; 267 268 if (pdata->is_internal_phy) 269 return 0; 270 271 mutex_lock(&dev->phy_mutex); 272 273 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 274 if (ret < 0) 275 goto reset_out; 276 277 val |= PM_CTL_PHY_RST_; 278 279 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 280 if (ret < 0) 281 goto reset_out; 282 283 /* Driver has no knowledge at this point about the external PHY. 284 * The 802.3 specifies that the reset process shall 285 * be completed within 0.5 s. 286 */ 287 fsleep(500000); 288 289 reset_out: 290 mutex_unlock(&dev->phy_mutex); 291 292 return 0; 293 } 294 295 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 296 { 297 struct usbnet *dev = bus->priv; 298 299 return smsc95xx_mdio_read(dev, phy_id, idx); 300 } 301 302 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 303 u16 regval) 304 { 305 struct usbnet *dev = bus->priv; 306 307 smsc95xx_mdio_write(dev, phy_id, idx, regval); 308 return 0; 309 } 310 311 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 312 { 313 unsigned long start_time = jiffies; 314 u32 val; 315 int ret; 316 317 do { 318 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 319 if (ret < 0) { 320 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 321 return ret; 322 } 323 324 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 325 break; 326 udelay(40); 327 } while (!time_after(jiffies, start_time + HZ)); 328 329 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 330 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 331 return -EIO; 332 } 333 334 return 0; 335 } 336 337 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 338 { 339 unsigned long start_time = jiffies; 340 u32 val; 341 int ret; 342 343 do { 344 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 345 if (ret < 0) { 346 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 347 return ret; 348 } 349 350 if (!(val & E2P_CMD_BUSY_)) 351 return 0; 352 353 udelay(40); 354 } while (!time_after(jiffies, start_time + HZ)); 355 356 netdev_warn(dev->net, "EEPROM is busy\n"); 357 return -EIO; 358 } 359 360 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 361 u8 *data) 362 { 363 u32 val; 364 int i, ret; 365 366 BUG_ON(!dev); 367 BUG_ON(!data); 368 369 ret = smsc95xx_eeprom_confirm_not_busy(dev); 370 if (ret) 371 return ret; 372 373 for (i = 0; i < length; i++) { 374 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 375 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 376 if (ret < 0) { 377 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 378 return ret; 379 } 380 381 ret = smsc95xx_wait_eeprom(dev); 382 if (ret < 0) 383 return ret; 384 385 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 386 if (ret < 0) { 387 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 388 return ret; 389 } 390 391 data[i] = val & 0xFF; 392 offset++; 393 } 394 395 return 0; 396 } 397 398 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 399 u8 *data) 400 { 401 u32 val; 402 int i, ret; 403 404 BUG_ON(!dev); 405 BUG_ON(!data); 406 407 ret = smsc95xx_eeprom_confirm_not_busy(dev); 408 if (ret) 409 return ret; 410 411 /* Issue write/erase enable command */ 412 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 413 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 414 if (ret < 0) { 415 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 416 return ret; 417 } 418 419 ret = smsc95xx_wait_eeprom(dev); 420 if (ret < 0) 421 return ret; 422 423 for (i = 0; i < length; i++) { 424 425 /* Fill data register */ 426 val = data[i]; 427 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 428 if (ret < 0) { 429 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 430 return ret; 431 } 432 433 /* Send "write" command */ 434 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 435 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 436 if (ret < 0) { 437 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 438 return ret; 439 } 440 441 ret = smsc95xx_wait_eeprom(dev); 442 if (ret < 0) 443 return ret; 444 445 offset++; 446 } 447 448 return 0; 449 } 450 451 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 452 u32 data) 453 { 454 const u16 size = 4; 455 u32 buf; 456 int ret; 457 458 buf = data; 459 cpu_to_le32s(&buf); 460 461 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 462 USB_DIR_OUT | USB_TYPE_VENDOR | 463 USB_RECIP_DEVICE, 464 0, index, &buf, size); 465 if (ret < 0) 466 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 467 ret); 468 return ret; 469 } 470 471 /* returns hash bit number for given MAC address 472 * example: 473 * 01 00 5E 00 00 01 -> returns bit number 31 */ 474 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 475 { 476 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 477 } 478 479 static void smsc95xx_set_multicast(struct net_device *netdev) 480 { 481 struct usbnet *dev = netdev_priv(netdev); 482 struct smsc95xx_priv *pdata = dev->driver_priv; 483 unsigned long flags; 484 int ret; 485 486 pdata->hash_hi = 0; 487 pdata->hash_lo = 0; 488 489 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 490 491 if (dev->net->flags & IFF_PROMISC) { 492 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 493 pdata->mac_cr |= MAC_CR_PRMS_; 494 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 495 } else if (dev->net->flags & IFF_ALLMULTI) { 496 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 497 pdata->mac_cr |= MAC_CR_MCPAS_; 498 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 499 } else if (!netdev_mc_empty(dev->net)) { 500 struct netdev_hw_addr *ha; 501 502 pdata->mac_cr |= MAC_CR_HPFILT_; 503 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 504 505 netdev_for_each_mc_addr(ha, netdev) { 506 u32 bitnum = smsc95xx_hash(ha->addr); 507 u32 mask = 0x01 << (bitnum & 0x1F); 508 if (bitnum & 0x20) 509 pdata->hash_hi |= mask; 510 else 511 pdata->hash_lo |= mask; 512 } 513 514 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 515 pdata->hash_hi, pdata->hash_lo); 516 } else { 517 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 518 pdata->mac_cr &= 519 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 520 } 521 522 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 523 524 /* Initiate async writes, as we can't wait for completion here */ 525 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 526 if (ret < 0) 527 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 528 529 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 530 if (ret < 0) 531 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 532 533 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 534 if (ret < 0) 535 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 536 } 537 538 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 539 { 540 u32 flow = 0, afc_cfg; 541 struct smsc95xx_priv *pdata = dev->driver_priv; 542 bool tx_pause, rx_pause; 543 544 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 545 if (ret < 0) 546 return ret; 547 548 if (pdata->phydev->duplex == DUPLEX_FULL) { 549 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 550 551 if (rx_pause) 552 flow = 0xFFFF0002; 553 554 if (tx_pause) { 555 afc_cfg |= 0xF; 556 flow |= 0xFFFF0000; 557 } else { 558 afc_cfg &= ~0xF; 559 } 560 561 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 562 rx_pause ? "enabled" : "disabled", 563 tx_pause ? "enabled" : "disabled"); 564 } else { 565 netif_dbg(dev, link, dev->net, "half duplex\n"); 566 afc_cfg |= 0xF; 567 } 568 569 ret = smsc95xx_write_reg(dev, FLOW, flow); 570 if (ret < 0) 571 return ret; 572 573 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 574 } 575 576 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) 577 { 578 struct smsc95xx_priv *pdata = dev->driver_priv; 579 unsigned long flags; 580 int ret; 581 582 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 583 if (pdata->phydev->duplex != DUPLEX_FULL) { 584 pdata->mac_cr &= ~MAC_CR_FDPX_; 585 pdata->mac_cr |= MAC_CR_RCVOWN_; 586 } else { 587 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 588 pdata->mac_cr |= MAC_CR_FDPX_; 589 } 590 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 591 592 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 593 if (ret < 0) { 594 if (ret != -ENODEV) 595 netdev_warn(dev->net, 596 "Error updating MAC full duplex mode\n"); 597 return; 598 } 599 600 ret = smsc95xx_phy_update_flowcontrol(dev); 601 if (ret < 0) 602 netdev_warn(dev->net, "Error updating PHY flow control\n"); 603 } 604 605 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 606 { 607 struct smsc95xx_priv *pdata = dev->driver_priv; 608 unsigned long flags; 609 u32 intdata; 610 611 if (urb->actual_length != 4) { 612 netdev_warn(dev->net, "unexpected urb length %d\n", 613 urb->actual_length); 614 return; 615 } 616 617 intdata = get_unaligned_le32(urb->transfer_buffer); 618 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 619 620 local_irq_save(flags); 621 622 if (intdata & INT_ENP_PHY_INT_) 623 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ); 624 else 625 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 626 intdata); 627 628 local_irq_restore(flags); 629 } 630 631 /* Enable or disable Tx & Rx checksum offload engines */ 632 static int smsc95xx_set_features(struct net_device *netdev, 633 netdev_features_t features) 634 { 635 struct usbnet *dev = netdev_priv(netdev); 636 u32 read_buf; 637 int ret; 638 639 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 640 if (ret < 0) 641 return ret; 642 643 if (features & NETIF_F_IP_CSUM) 644 read_buf |= Tx_COE_EN_; 645 else 646 read_buf &= ~Tx_COE_EN_; 647 648 if (features & NETIF_F_RXCSUM) 649 read_buf |= Rx_COE_EN_; 650 else 651 read_buf &= ~Rx_COE_EN_; 652 653 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 654 if (ret < 0) 655 return ret; 656 657 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 658 return 0; 659 } 660 661 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 662 { 663 return MAX_EEPROM_SIZE; 664 } 665 666 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 667 struct ethtool_eeprom *ee, u8 *data) 668 { 669 struct usbnet *dev = netdev_priv(netdev); 670 671 ee->magic = LAN95XX_EEPROM_MAGIC; 672 673 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 674 } 675 676 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 677 struct ethtool_eeprom *ee, u8 *data) 678 { 679 struct usbnet *dev = netdev_priv(netdev); 680 681 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 682 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 683 ee->magic); 684 return -EINVAL; 685 } 686 687 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 688 } 689 690 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 691 { 692 /* all smsc95xx registers */ 693 return COE_CR - ID_REV + sizeof(u32); 694 } 695 696 static void 697 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 698 void *buf) 699 { 700 struct usbnet *dev = netdev_priv(netdev); 701 unsigned int i, j; 702 int retval; 703 u32 *data = buf; 704 705 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 706 if (retval < 0) { 707 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 708 return; 709 } 710 711 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 712 retval = smsc95xx_read_reg(dev, i, &data[j]); 713 if (retval < 0) { 714 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 715 return; 716 } 717 } 718 } 719 720 static void smsc95xx_ethtool_get_wol(struct net_device *net, 721 struct ethtool_wolinfo *wolinfo) 722 { 723 struct usbnet *dev = netdev_priv(net); 724 struct smsc95xx_priv *pdata = dev->driver_priv; 725 726 wolinfo->supported = SUPPORTED_WAKE; 727 wolinfo->wolopts = pdata->wolopts; 728 } 729 730 static int smsc95xx_ethtool_set_wol(struct net_device *net, 731 struct ethtool_wolinfo *wolinfo) 732 { 733 struct usbnet *dev = netdev_priv(net); 734 struct smsc95xx_priv *pdata = dev->driver_priv; 735 int ret; 736 737 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 738 return -EINVAL; 739 740 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 741 742 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 743 if (ret < 0) 744 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 745 746 return ret; 747 } 748 749 static u32 smsc95xx_get_link(struct net_device *net) 750 { 751 phy_read_status(net->phydev); 752 return net->phydev->link; 753 } 754 755 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, 756 u8 *data) 757 { 758 switch (sset) { 759 case ETH_SS_TEST: 760 net_selftest_get_strings(data); 761 break; 762 } 763 } 764 765 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) 766 { 767 switch (sset) { 768 case ETH_SS_TEST: 769 return net_selftest_get_count(); 770 default: 771 return -EOPNOTSUPP; 772 } 773 } 774 775 static const struct ethtool_ops smsc95xx_ethtool_ops = { 776 .get_link = smsc95xx_get_link, 777 .nway_reset = phy_ethtool_nway_reset, 778 .get_drvinfo = usbnet_get_drvinfo, 779 .get_msglevel = usbnet_get_msglevel, 780 .set_msglevel = usbnet_set_msglevel, 781 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 782 .get_eeprom = smsc95xx_ethtool_get_eeprom, 783 .set_eeprom = smsc95xx_ethtool_set_eeprom, 784 .get_regs_len = smsc95xx_ethtool_getregslen, 785 .get_regs = smsc95xx_ethtool_getregs, 786 .get_wol = smsc95xx_ethtool_get_wol, 787 .set_wol = smsc95xx_ethtool_set_wol, 788 .get_link_ksettings = phy_ethtool_get_link_ksettings, 789 .set_link_ksettings = phy_ethtool_set_link_ksettings, 790 .get_ts_info = ethtool_op_get_ts_info, 791 .self_test = net_selftest, 792 .get_strings = smsc95xx_ethtool_get_strings, 793 .get_sset_count = smsc95xx_ethtool_get_sset_count, 794 }; 795 796 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 797 { 798 if (!netif_running(netdev)) 799 return -EINVAL; 800 801 return phy_mii_ioctl(netdev->phydev, rq, cmd); 802 } 803 804 static void smsc95xx_init_mac_address(struct usbnet *dev) 805 { 806 u8 addr[ETH_ALEN]; 807 808 /* maybe the boot loader passed the MAC address in devicetree */ 809 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 810 if (is_valid_ether_addr(dev->net->dev_addr)) { 811 /* device tree values are valid so use them */ 812 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 813 return; 814 } 815 } 816 817 /* try reading mac address from EEPROM */ 818 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 819 eth_hw_addr_set(dev->net, addr); 820 if (is_valid_ether_addr(dev->net->dev_addr)) { 821 /* eeprom values are valid so use them */ 822 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 823 return; 824 } 825 } 826 827 /* no useful static MAC address found. generate a random one */ 828 eth_hw_addr_random(dev->net); 829 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 830 } 831 832 static int smsc95xx_set_mac_address(struct usbnet *dev) 833 { 834 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 835 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 836 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 837 int ret; 838 839 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 840 if (ret < 0) 841 return ret; 842 843 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 844 } 845 846 /* starts the TX path */ 847 static int smsc95xx_start_tx_path(struct usbnet *dev) 848 { 849 struct smsc95xx_priv *pdata = dev->driver_priv; 850 unsigned long flags; 851 int ret; 852 853 /* Enable Tx at MAC */ 854 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 855 pdata->mac_cr |= MAC_CR_TXEN_; 856 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 857 858 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 859 if (ret < 0) 860 return ret; 861 862 /* Enable Tx at SCSRs */ 863 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 864 } 865 866 /* Starts the Receive path */ 867 static int smsc95xx_start_rx_path(struct usbnet *dev) 868 { 869 struct smsc95xx_priv *pdata = dev->driver_priv; 870 unsigned long flags; 871 872 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 873 pdata->mac_cr |= MAC_CR_RXEN_; 874 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 875 876 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 877 } 878 879 static int smsc95xx_reset(struct usbnet *dev) 880 { 881 struct smsc95xx_priv *pdata = dev->driver_priv; 882 u32 read_buf, burst_cap; 883 int ret = 0, timeout; 884 885 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 886 887 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 888 if (ret < 0) 889 return ret; 890 891 timeout = 0; 892 do { 893 msleep(10); 894 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 895 if (ret < 0) 896 return ret; 897 timeout++; 898 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 899 900 if (timeout >= 100) { 901 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 902 return -ETIMEDOUT; 903 } 904 905 ret = smsc95xx_set_mac_address(dev); 906 if (ret < 0) 907 return ret; 908 909 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 910 dev->net->dev_addr); 911 912 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 913 if (ret < 0) 914 return ret; 915 916 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 917 read_buf); 918 919 read_buf |= HW_CFG_BIR_; 920 921 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 922 if (ret < 0) 923 return ret; 924 925 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 926 if (ret < 0) 927 return ret; 928 929 netif_dbg(dev, ifup, dev->net, 930 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 931 read_buf); 932 933 if (!turbo_mode) { 934 burst_cap = 0; 935 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 936 } else if (dev->udev->speed == USB_SPEED_HIGH) { 937 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 938 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 939 } else { 940 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 941 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 942 } 943 944 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 945 (ulong)dev->rx_urb_size); 946 947 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 948 if (ret < 0) 949 return ret; 950 951 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 952 if (ret < 0) 953 return ret; 954 955 netif_dbg(dev, ifup, dev->net, 956 "Read Value from BURST_CAP after writing: 0x%08x\n", 957 read_buf); 958 959 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 960 if (ret < 0) 961 return ret; 962 963 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 964 if (ret < 0) 965 return ret; 966 967 netif_dbg(dev, ifup, dev->net, 968 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 969 read_buf); 970 971 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 972 if (ret < 0) 973 return ret; 974 975 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 976 read_buf); 977 978 if (turbo_mode) 979 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 980 981 read_buf &= ~HW_CFG_RXDOFF_; 982 983 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 984 read_buf |= NET_IP_ALIGN << 9; 985 986 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 987 if (ret < 0) 988 return ret; 989 990 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 991 if (ret < 0) 992 return ret; 993 994 netif_dbg(dev, ifup, dev->net, 995 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 996 997 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 998 if (ret < 0) 999 return ret; 1000 1001 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1002 if (ret < 0) 1003 return ret; 1004 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1005 1006 ret = smsc95xx_read_reg(dev, LED_GPIO_CFG, &read_buf); 1007 if (ret < 0) 1008 return ret; 1009 /* Configure GPIO pins as LED outputs */ 1010 read_buf |= LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1011 LED_GPIO_CFG_FDX_LED; 1012 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, read_buf); 1013 if (ret < 0) 1014 return ret; 1015 1016 /* Init Tx */ 1017 ret = smsc95xx_write_reg(dev, FLOW, 0); 1018 if (ret < 0) 1019 return ret; 1020 1021 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1022 if (ret < 0) 1023 return ret; 1024 1025 /* Don't need mac_cr_lock during initialisation */ 1026 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1027 if (ret < 0) 1028 return ret; 1029 1030 /* Init Rx */ 1031 /* Set Vlan */ 1032 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1033 if (ret < 0) 1034 return ret; 1035 1036 /* Enable or disable checksum offload engines */ 1037 ret = smsc95xx_set_features(dev->net, dev->net->features); 1038 if (ret < 0) { 1039 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1040 return ret; 1041 } 1042 1043 smsc95xx_set_multicast(dev->net); 1044 1045 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1046 if (ret < 0) 1047 return ret; 1048 1049 /* enable PHY interrupts */ 1050 read_buf |= INT_EP_CTL_PHY_INT_; 1051 1052 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1053 if (ret < 0) 1054 return ret; 1055 1056 ret = smsc95xx_start_tx_path(dev); 1057 if (ret < 0) { 1058 netdev_warn(dev->net, "Failed to start TX path\n"); 1059 return ret; 1060 } 1061 1062 ret = smsc95xx_start_rx_path(dev); 1063 if (ret < 0) { 1064 netdev_warn(dev->net, "Failed to start RX path\n"); 1065 return ret; 1066 } 1067 1068 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1069 return 0; 1070 } 1071 1072 static const struct net_device_ops smsc95xx_netdev_ops = { 1073 .ndo_open = usbnet_open, 1074 .ndo_stop = usbnet_stop, 1075 .ndo_start_xmit = usbnet_start_xmit, 1076 .ndo_tx_timeout = usbnet_tx_timeout, 1077 .ndo_change_mtu = usbnet_change_mtu, 1078 .ndo_get_stats64 = dev_get_tstats64, 1079 .ndo_set_mac_address = eth_mac_addr, 1080 .ndo_validate_addr = eth_validate_addr, 1081 .ndo_eth_ioctl = smsc95xx_ioctl, 1082 .ndo_set_rx_mode = smsc95xx_set_multicast, 1083 .ndo_set_features = smsc95xx_set_features, 1084 }; 1085 1086 static void smsc95xx_handle_link_change(struct net_device *net) 1087 { 1088 struct usbnet *dev = netdev_priv(net); 1089 1090 phy_print_status(net->phydev); 1091 smsc95xx_mac_update_fullduplex(dev); 1092 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1093 } 1094 1095 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1096 { 1097 struct smsc95xx_priv *pdata; 1098 char usb_path[64]; 1099 int ret, phy_irq; 1100 u32 val; 1101 1102 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1103 1104 ret = usbnet_get_endpoints(dev, intf); 1105 if (ret < 0) { 1106 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1107 return ret; 1108 } 1109 1110 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1111 if (!pdata) 1112 return -ENOMEM; 1113 1114 dev->driver_priv = pdata; 1115 1116 spin_lock_init(&pdata->mac_cr_lock); 1117 1118 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1119 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1120 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1121 * it is transmitted as all ones. The zero transmitted checksum means 1122 * transmitter generated no checksum. Hence, enable csum offload only 1123 * for ipv4 packets. 1124 */ 1125 if (DEFAULT_TX_CSUM_ENABLE) 1126 dev->net->features |= NETIF_F_IP_CSUM; 1127 if (DEFAULT_RX_CSUM_ENABLE) 1128 dev->net->features |= NETIF_F_RXCSUM; 1129 1130 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1131 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1132 1133 smsc95xx_init_mac_address(dev); 1134 1135 /* Init all registers */ 1136 ret = smsc95xx_reset(dev); 1137 if (ret) 1138 goto free_pdata; 1139 1140 /* create irq domain for use by PHY driver and GPIO consumers */ 1141 usb_make_path(dev->udev, usb_path, sizeof(usb_path)); 1142 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path); 1143 if (!pdata->irqfwnode) { 1144 ret = -ENOMEM; 1145 goto free_pdata; 1146 } 1147 1148 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode, 1149 SMSC95XX_NR_IRQS, 1150 &irq_domain_simple_ops, 1151 pdata); 1152 if (!pdata->irqdomain) { 1153 ret = -ENOMEM; 1154 goto free_irqfwnode; 1155 } 1156 1157 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ); 1158 if (!phy_irq) { 1159 ret = -ENOENT; 1160 goto remove_irqdomain; 1161 } 1162 1163 pdata->irqchip = dummy_irq_chip; 1164 pdata->irqchip.name = SMSC_CHIPNAME; 1165 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip, 1166 handle_simple_irq, "phy"); 1167 1168 pdata->mdiobus = mdiobus_alloc(); 1169 if (!pdata->mdiobus) { 1170 ret = -ENOMEM; 1171 goto dispose_irq; 1172 } 1173 1174 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1175 if (ret < 0) 1176 goto free_mdio; 1177 1178 pdata->is_internal_phy = !(val & HW_CFG_PSEL_); 1179 if (pdata->is_internal_phy) 1180 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1181 1182 pdata->mdiobus->priv = dev; 1183 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1184 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1185 pdata->mdiobus->reset = smsc95xx_mdiobus_reset; 1186 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1187 pdata->mdiobus->parent = &dev->udev->dev; 1188 1189 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1190 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1191 1192 ret = mdiobus_register(pdata->mdiobus); 1193 if (ret) { 1194 netdev_err(dev->net, "Could not register MDIO bus\n"); 1195 goto free_mdio; 1196 } 1197 1198 pdata->phydev = phy_find_first(pdata->mdiobus); 1199 if (!pdata->phydev) { 1200 netdev_err(dev->net, "no PHY found\n"); 1201 ret = -ENODEV; 1202 goto unregister_mdio; 1203 } 1204 1205 pdata->phydev->irq = phy_irq; 1206 pdata->phydev->is_internal = pdata->is_internal_phy; 1207 1208 /* detect device revision as different features may be available */ 1209 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1210 if (ret < 0) 1211 goto unregister_mdio; 1212 1213 val >>= 16; 1214 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1215 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1216 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1217 FEATURE_PHY_NLP_CROSSOVER | 1218 FEATURE_REMOTE_WAKEUP); 1219 else if (val == ID_REV_CHIP_ID_9512_) 1220 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1221 1222 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1223 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1224 dev->net->flags |= IFF_MULTICAST; 1225 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1226 dev->net->min_mtu = ETH_MIN_MTU; 1227 dev->net->max_mtu = ETH_DATA_LEN; 1228 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1229 1230 ret = phy_connect_direct(dev->net, pdata->phydev, 1231 &smsc95xx_handle_link_change, 1232 PHY_INTERFACE_MODE_MII); 1233 if (ret) { 1234 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1235 goto unregister_mdio; 1236 } 1237 1238 phy_attached_info(dev->net->phydev); 1239 1240 return 0; 1241 1242 unregister_mdio: 1243 mdiobus_unregister(pdata->mdiobus); 1244 1245 free_mdio: 1246 mdiobus_free(pdata->mdiobus); 1247 1248 dispose_irq: 1249 irq_dispose_mapping(phy_irq); 1250 1251 remove_irqdomain: 1252 irq_domain_remove(pdata->irqdomain); 1253 1254 free_irqfwnode: 1255 irq_domain_free_fwnode(pdata->irqfwnode); 1256 1257 free_pdata: 1258 kfree(pdata); 1259 return ret; 1260 } 1261 1262 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1263 { 1264 struct smsc95xx_priv *pdata = dev->driver_priv; 1265 1266 phy_disconnect(dev->net->phydev); 1267 mdiobus_unregister(pdata->mdiobus); 1268 mdiobus_free(pdata->mdiobus); 1269 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); 1270 irq_domain_remove(pdata->irqdomain); 1271 irq_domain_free_fwnode(pdata->irqfwnode); 1272 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1273 kfree(pdata); 1274 } 1275 1276 static int smsc95xx_start_phy(struct usbnet *dev) 1277 { 1278 phy_start(dev->net->phydev); 1279 1280 return 0; 1281 } 1282 1283 static int smsc95xx_stop(struct usbnet *dev) 1284 { 1285 phy_stop(dev->net->phydev); 1286 1287 return 0; 1288 } 1289 1290 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1291 { 1292 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1293 return crc << ((filter % 2) * 16); 1294 } 1295 1296 static int smsc95xx_link_ok(struct usbnet *dev) 1297 { 1298 struct smsc95xx_priv *pdata = dev->driver_priv; 1299 int ret; 1300 1301 /* first, a dummy read, needed to latch some MII phys */ 1302 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1303 if (ret < 0) 1304 return ret; 1305 1306 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); 1307 if (ret < 0) 1308 return ret; 1309 1310 return !!(ret & BMSR_LSTATUS); 1311 } 1312 1313 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1314 { 1315 struct smsc95xx_priv *pdata = dev->driver_priv; 1316 u32 val; 1317 int ret; 1318 1319 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1320 if (ret < 0) 1321 return ret; 1322 1323 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1324 val |= PM_CTL_SUS_MODE_0; 1325 1326 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1327 if (ret < 0) 1328 return ret; 1329 1330 /* clear wol status */ 1331 val &= ~PM_CTL_WUPS_; 1332 val |= PM_CTL_WUPS_WOL_; 1333 1334 /* enable energy detection */ 1335 if (pdata->wolopts & WAKE_PHY) 1336 val |= PM_CTL_WUPS_ED_; 1337 1338 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1339 if (ret < 0) 1340 return ret; 1341 1342 /* read back PM_CTRL */ 1343 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1344 if (ret < 0) 1345 return ret; 1346 1347 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1348 1349 return 0; 1350 } 1351 1352 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1353 { 1354 struct smsc95xx_priv *pdata = dev->driver_priv; 1355 int ret, phy_id = pdata->phydev->mdio.addr; 1356 u32 val; 1357 1358 /* reconfigure link pulse detection timing for 1359 * compatibility with non-standard link partners 1360 */ 1361 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1362 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, 1363 PHY_EDPD_CONFIG_DEFAULT); 1364 1365 /* enable energy detect power-down mode */ 1366 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); 1367 if (ret < 0) 1368 return ret; 1369 1370 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1371 1372 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret); 1373 1374 /* enter SUSPEND1 mode */ 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_1; 1381 1382 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1383 if (ret < 0) 1384 return ret; 1385 1386 /* clear wol status, enable energy detection */ 1387 val &= ~PM_CTL_WUPS_; 1388 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1389 1390 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1391 if (ret < 0) 1392 return ret; 1393 1394 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1395 1396 return 0; 1397 } 1398 1399 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1400 { 1401 struct smsc95xx_priv *pdata = dev->driver_priv; 1402 u32 val; 1403 int ret; 1404 1405 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1406 if (ret < 0) 1407 return ret; 1408 1409 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1410 val |= PM_CTL_SUS_MODE_2; 1411 1412 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1413 if (ret < 0) 1414 return ret; 1415 1416 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1417 1418 return 0; 1419 } 1420 1421 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1422 { 1423 struct smsc95xx_priv *pdata = dev->driver_priv; 1424 u32 val; 1425 int ret; 1426 1427 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val); 1428 if (ret < 0) 1429 return ret; 1430 1431 if (val & RX_FIFO_INF_USED_) { 1432 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1433 return -EBUSY; 1434 } 1435 1436 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1437 if (ret < 0) 1438 return ret; 1439 1440 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1441 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1442 1443 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1444 if (ret < 0) 1445 return ret; 1446 1447 /* clear wol status */ 1448 val &= ~PM_CTL_WUPS_; 1449 val |= PM_CTL_WUPS_WOL_; 1450 1451 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1452 if (ret < 0) 1453 return ret; 1454 1455 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1456 1457 return 0; 1458 } 1459 1460 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1461 { 1462 struct smsc95xx_priv *pdata = dev->driver_priv; 1463 1464 if (!netif_running(dev->net)) { 1465 /* interface is ifconfig down so fully power down hw */ 1466 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1467 return smsc95xx_enter_suspend2(dev); 1468 } 1469 1470 if (!link_up) { 1471 /* link is down so enter EDPD mode, but only if device can 1472 * reliably resume from it. This check should be redundant 1473 * as current FEATURE_REMOTE_WAKEUP parts also support 1474 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1475 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1476 netdev_warn(dev->net, "EDPD not supported\n"); 1477 return -EBUSY; 1478 } 1479 1480 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1481 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1482 return smsc95xx_enter_suspend1(dev); 1483 } 1484 1485 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1486 return smsc95xx_enter_suspend3(dev); 1487 } 1488 1489 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1490 { 1491 struct usbnet *dev = usb_get_intfdata(intf); 1492 struct smsc95xx_priv *pdata = dev->driver_priv; 1493 u32 val, link_up; 1494 int ret; 1495 1496 pdata->pm_task = current; 1497 1498 ret = usbnet_suspend(intf, message); 1499 if (ret < 0) { 1500 netdev_warn(dev->net, "usbnet_suspend error\n"); 1501 pdata->pm_task = NULL; 1502 return ret; 1503 } 1504 1505 if (pdata->suspend_flags) { 1506 netdev_warn(dev->net, "error during last resume\n"); 1507 pdata->suspend_flags = 0; 1508 } 1509 1510 link_up = smsc95xx_link_ok(dev); 1511 1512 if (message.event == PM_EVENT_AUTO_SUSPEND && 1513 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1514 ret = smsc95xx_autosuspend(dev, link_up); 1515 goto done; 1516 } 1517 1518 /* if we get this far we're not autosuspending */ 1519 /* if no wol options set, or if link is down and we're not waking on 1520 * PHY activity, enter lowest power SUSPEND2 mode 1521 */ 1522 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1523 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1524 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1525 1526 /* disable energy detect (link up) & wake up events */ 1527 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1528 if (ret < 0) 1529 goto done; 1530 1531 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1532 1533 ret = smsc95xx_write_reg(dev, WUCSR, val); 1534 if (ret < 0) 1535 goto done; 1536 1537 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1538 if (ret < 0) 1539 goto done; 1540 1541 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1542 1543 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1544 if (ret < 0) 1545 goto done; 1546 1547 ret = smsc95xx_enter_suspend2(dev); 1548 goto done; 1549 } 1550 1551 if (pdata->wolopts & WAKE_PHY) { 1552 /* if link is down then configure EDPD and enter SUSPEND1, 1553 * otherwise enter SUSPEND0 below 1554 */ 1555 if (!link_up) { 1556 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1557 ret = smsc95xx_enter_suspend1(dev); 1558 goto done; 1559 } 1560 } 1561 1562 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1563 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1564 u32 command[2]; 1565 u32 offset[2]; 1566 u32 crc[4]; 1567 int wuff_filter_count = 1568 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1569 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1570 int i, filter = 0; 1571 1572 if (!filter_mask) { 1573 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1574 ret = -ENOMEM; 1575 goto done; 1576 } 1577 1578 memset(command, 0, sizeof(command)); 1579 memset(offset, 0, sizeof(offset)); 1580 memset(crc, 0, sizeof(crc)); 1581 1582 if (pdata->wolopts & WAKE_BCAST) { 1583 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1584 netdev_info(dev->net, "enabling broadcast detection\n"); 1585 filter_mask[filter * 4] = 0x003F; 1586 filter_mask[filter * 4 + 1] = 0x00; 1587 filter_mask[filter * 4 + 2] = 0x00; 1588 filter_mask[filter * 4 + 3] = 0x00; 1589 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1590 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1591 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1592 filter++; 1593 } 1594 1595 if (pdata->wolopts & WAKE_MCAST) { 1596 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1597 netdev_info(dev->net, "enabling multicast detection\n"); 1598 filter_mask[filter * 4] = 0x0007; 1599 filter_mask[filter * 4 + 1] = 0x00; 1600 filter_mask[filter * 4 + 2] = 0x00; 1601 filter_mask[filter * 4 + 3] = 0x00; 1602 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1603 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1604 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1605 filter++; 1606 } 1607 1608 if (pdata->wolopts & WAKE_ARP) { 1609 const u8 arp[] = {0x08, 0x06}; 1610 netdev_info(dev->net, "enabling ARP detection\n"); 1611 filter_mask[filter * 4] = 0x0003; 1612 filter_mask[filter * 4 + 1] = 0x00; 1613 filter_mask[filter * 4 + 2] = 0x00; 1614 filter_mask[filter * 4 + 3] = 0x00; 1615 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1616 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1617 crc[filter/2] |= smsc_crc(arp, 2, filter); 1618 filter++; 1619 } 1620 1621 if (pdata->wolopts & WAKE_UCAST) { 1622 netdev_info(dev->net, "enabling unicast detection\n"); 1623 filter_mask[filter * 4] = 0x003F; 1624 filter_mask[filter * 4 + 1] = 0x00; 1625 filter_mask[filter * 4 + 2] = 0x00; 1626 filter_mask[filter * 4 + 3] = 0x00; 1627 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1628 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1629 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1630 filter++; 1631 } 1632 1633 for (i = 0; i < (wuff_filter_count * 4); i++) { 1634 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]); 1635 if (ret < 0) { 1636 kfree(filter_mask); 1637 goto done; 1638 } 1639 } 1640 kfree(filter_mask); 1641 1642 for (i = 0; i < (wuff_filter_count / 4); i++) { 1643 ret = smsc95xx_write_reg(dev, WUFF, command[i]); 1644 if (ret < 0) 1645 goto done; 1646 } 1647 1648 for (i = 0; i < (wuff_filter_count / 4); i++) { 1649 ret = smsc95xx_write_reg(dev, WUFF, offset[i]); 1650 if (ret < 0) 1651 goto done; 1652 } 1653 1654 for (i = 0; i < (wuff_filter_count / 2); i++) { 1655 ret = smsc95xx_write_reg(dev, WUFF, crc[i]); 1656 if (ret < 0) 1657 goto done; 1658 } 1659 1660 /* clear any pending pattern match packet status */ 1661 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1662 if (ret < 0) 1663 goto done; 1664 1665 val |= WUCSR_WUFR_; 1666 1667 ret = smsc95xx_write_reg(dev, WUCSR, val); 1668 if (ret < 0) 1669 goto done; 1670 } 1671 1672 if (pdata->wolopts & WAKE_MAGIC) { 1673 /* clear any pending magic packet status */ 1674 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1675 if (ret < 0) 1676 goto done; 1677 1678 val |= WUCSR_MPR_; 1679 1680 ret = smsc95xx_write_reg(dev, WUCSR, val); 1681 if (ret < 0) 1682 goto done; 1683 } 1684 1685 /* enable/disable wakeup sources */ 1686 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1687 if (ret < 0) 1688 goto done; 1689 1690 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1691 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1692 val |= WUCSR_WAKE_EN_; 1693 } else { 1694 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1695 val &= ~WUCSR_WAKE_EN_; 1696 } 1697 1698 if (pdata->wolopts & WAKE_MAGIC) { 1699 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1700 val |= WUCSR_MPEN_; 1701 } else { 1702 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1703 val &= ~WUCSR_MPEN_; 1704 } 1705 1706 ret = smsc95xx_write_reg(dev, WUCSR, val); 1707 if (ret < 0) 1708 goto done; 1709 1710 /* enable wol wakeup source */ 1711 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1712 if (ret < 0) 1713 goto done; 1714 1715 val |= PM_CTL_WOL_EN_; 1716 1717 /* phy energy detect wakeup source */ 1718 if (pdata->wolopts & WAKE_PHY) 1719 val |= PM_CTL_ED_EN_; 1720 1721 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1722 if (ret < 0) 1723 goto done; 1724 1725 /* enable receiver to enable frame reception */ 1726 smsc95xx_start_rx_path(dev); 1727 1728 /* some wol options are enabled, so enter SUSPEND0 */ 1729 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1730 ret = smsc95xx_enter_suspend0(dev); 1731 1732 done: 1733 /* 1734 * TODO: resume() might need to handle the suspend failure 1735 * in system sleep 1736 */ 1737 if (ret && PMSG_IS_AUTO(message)) 1738 usbnet_resume(intf); 1739 1740 pdata->pm_task = NULL; 1741 return ret; 1742 } 1743 1744 static int smsc95xx_resume(struct usb_interface *intf) 1745 { 1746 struct usbnet *dev = usb_get_intfdata(intf); 1747 struct smsc95xx_priv *pdata; 1748 u8 suspend_flags; 1749 int ret; 1750 u32 val; 1751 1752 BUG_ON(!dev); 1753 pdata = dev->driver_priv; 1754 suspend_flags = pdata->suspend_flags; 1755 1756 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1757 1758 /* do this first to ensure it's cleared even in error case */ 1759 pdata->suspend_flags = 0; 1760 1761 pdata->pm_task = current; 1762 1763 if (suspend_flags & SUSPEND_ALLMODES) { 1764 /* clear wake-up sources */ 1765 ret = smsc95xx_read_reg(dev, WUCSR, &val); 1766 if (ret < 0) 1767 goto done; 1768 1769 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1770 1771 ret = smsc95xx_write_reg(dev, WUCSR, val); 1772 if (ret < 0) 1773 goto done; 1774 1775 /* clear wake-up status */ 1776 ret = smsc95xx_read_reg(dev, PM_CTRL, &val); 1777 if (ret < 0) 1778 goto done; 1779 1780 val &= ~PM_CTL_WOL_EN_; 1781 val |= PM_CTL_WUPS_; 1782 1783 ret = smsc95xx_write_reg(dev, PM_CTRL, val); 1784 if (ret < 0) 1785 goto done; 1786 } 1787 1788 phy_init_hw(pdata->phydev); 1789 1790 ret = usbnet_resume(intf); 1791 if (ret < 0) 1792 netdev_warn(dev->net, "usbnet_resume error\n"); 1793 1794 done: 1795 pdata->pm_task = NULL; 1796 return ret; 1797 } 1798 1799 static int smsc95xx_reset_resume(struct usb_interface *intf) 1800 { 1801 struct usbnet *dev = usb_get_intfdata(intf); 1802 struct smsc95xx_priv *pdata = dev->driver_priv; 1803 int ret; 1804 1805 pdata->pm_task = current; 1806 ret = smsc95xx_reset(dev); 1807 pdata->pm_task = NULL; 1808 if (ret < 0) 1809 return ret; 1810 1811 return smsc95xx_resume(intf); 1812 } 1813 1814 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1815 { 1816 u16 *csum_ptr = (u16 *)(skb_tail_pointer(skb) - 2); 1817 1818 skb->csum = (__force __wsum)get_unaligned(csum_ptr); 1819 skb->ip_summed = CHECKSUM_COMPLETE; 1820 skb_trim(skb, skb->len - 2); /* remove csum */ 1821 } 1822 1823 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1824 { 1825 /* This check is no longer done by usbnet */ 1826 if (skb->len < dev->net->hard_header_len) 1827 return 0; 1828 1829 while (skb->len > 0) { 1830 u32 header, align_count; 1831 struct sk_buff *ax_skb; 1832 unsigned char *packet; 1833 u16 size; 1834 1835 header = get_unaligned_le32(skb->data); 1836 skb_pull(skb, 4 + NET_IP_ALIGN); 1837 packet = skb->data; 1838 1839 /* get the packet length */ 1840 size = (u16)((header & RX_STS_FL_) >> 16); 1841 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1842 1843 if (unlikely(size > skb->len)) { 1844 netif_dbg(dev, rx_err, dev->net, 1845 "size err header=0x%08x\n", header); 1846 return 0; 1847 } 1848 1849 if (unlikely(header & RX_STS_ES_)) { 1850 netif_dbg(dev, rx_err, dev->net, 1851 "Error header=0x%08x\n", header); 1852 dev->net->stats.rx_errors++; 1853 dev->net->stats.rx_dropped++; 1854 1855 if (header & RX_STS_CRC_) { 1856 dev->net->stats.rx_crc_errors++; 1857 } else { 1858 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1859 dev->net->stats.rx_frame_errors++; 1860 1861 if ((header & RX_STS_LE_) && 1862 (!(header & RX_STS_FT_))) 1863 dev->net->stats.rx_length_errors++; 1864 } 1865 } else { 1866 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1867 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1868 netif_dbg(dev, rx_err, dev->net, 1869 "size err header=0x%08x\n", header); 1870 return 0; 1871 } 1872 1873 /* last frame in this batch */ 1874 if (skb->len == size) { 1875 if (dev->net->features & NETIF_F_RXCSUM) 1876 smsc95xx_rx_csum_offload(skb); 1877 skb_trim(skb, skb->len - 4); /* remove fcs */ 1878 1879 return 1; 1880 } 1881 1882 ax_skb = netdev_alloc_skb_ip_align(dev->net, size); 1883 if (unlikely(!ax_skb)) { 1884 netdev_warn(dev->net, "Error allocating skb\n"); 1885 return 0; 1886 } 1887 1888 skb_put(ax_skb, size); 1889 memcpy(ax_skb->data, packet, size); 1890 1891 if (dev->net->features & NETIF_F_RXCSUM) 1892 smsc95xx_rx_csum_offload(ax_skb); 1893 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1894 1895 usbnet_skb_return(dev, ax_skb); 1896 } 1897 1898 skb_pull(skb, size); 1899 1900 /* padding bytes before the next frame starts */ 1901 if (skb->len) 1902 skb_pull(skb, align_count); 1903 } 1904 1905 return 1; 1906 } 1907 1908 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1909 { 1910 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1911 u16 high_16 = low_16 + skb->csum_offset; 1912 return (high_16 << 16) | low_16; 1913 } 1914 1915 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1916 * transmission. This is fairly unlikely, only seems to trigger with some 1917 * short TCP ACK packets sent. 1918 * 1919 * Note, this calculation should probably check for the alignment of the 1920 * data as well, but a straight check for csum being in the last four bytes 1921 * of the packet should be ok for now. 1922 */ 1923 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1924 { 1925 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1926 1927 if (skb->len <= 45) 1928 return false; 1929 return skb->csum_offset < (len - (4 + 1)); 1930 } 1931 1932 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1933 struct sk_buff *skb, gfp_t flags) 1934 { 1935 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1936 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1937 u32 tx_cmd_a, tx_cmd_b; 1938 void *ptr; 1939 1940 /* We do not advertise SG, so skbs should be already linearized */ 1941 BUG_ON(skb_shinfo(skb)->nr_frags); 1942 1943 /* Make writable and expand header space by overhead if required */ 1944 if (skb_cow_head(skb, overhead)) { 1945 /* Must deallocate here as returning NULL to indicate error 1946 * means the skb won't be deallocated in the caller. 1947 */ 1948 dev_kfree_skb_any(skb); 1949 return NULL; 1950 } 1951 1952 tx_cmd_b = (u32)skb->len; 1953 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1954 1955 if (csum) { 1956 if (!smsc95xx_can_tx_checksum(skb)) { 1957 /* workaround - hardware tx checksum does not work 1958 * properly with extremely small packets */ 1959 long csstart = skb_checksum_start_offset(skb); 1960 __wsum calc = csum_partial(skb->data + csstart, 1961 skb->len - csstart, 0); 1962 *((__sum16 *)(skb->data + csstart 1963 + skb->csum_offset)) = csum_fold(calc); 1964 1965 csum = false; 1966 } else { 1967 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1968 ptr = skb_push(skb, 4); 1969 put_unaligned_le32(csum_preamble, ptr); 1970 1971 tx_cmd_a += 4; 1972 tx_cmd_b += 4; 1973 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1974 } 1975 } 1976 1977 ptr = skb_push(skb, 8); 1978 put_unaligned_le32(tx_cmd_a, ptr); 1979 put_unaligned_le32(tx_cmd_b, ptr+4); 1980 1981 return skb; 1982 } 1983 1984 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1985 { 1986 struct smsc95xx_priv *pdata = dev->driver_priv; 1987 1988 dev->intf->needs_remote_wakeup = on; 1989 1990 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1991 return 0; 1992 1993 /* this chip revision isn't capable of remote wakeup */ 1994 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1995 1996 if (on) 1997 usb_autopm_get_interface_no_resume(dev->intf); 1998 else 1999 usb_autopm_put_interface(dev->intf); 2000 2001 return 0; 2002 } 2003 2004 static const struct driver_info smsc95xx_info = { 2005 .description = "smsc95xx USB 2.0 Ethernet", 2006 .bind = smsc95xx_bind, 2007 .unbind = smsc95xx_unbind, 2008 .reset = smsc95xx_reset, 2009 .check_connect = smsc95xx_start_phy, 2010 .stop = smsc95xx_stop, 2011 .rx_fixup = smsc95xx_rx_fixup, 2012 .tx_fixup = smsc95xx_tx_fixup, 2013 .status = smsc95xx_status, 2014 .manage_power = smsc95xx_manage_power, 2015 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2016 }; 2017 2018 static const struct usb_device_id products[] = { 2019 { 2020 /* SMSC9500 USB Ethernet Device */ 2021 USB_DEVICE(0x0424, 0x9500), 2022 .driver_info = (unsigned long) &smsc95xx_info, 2023 }, 2024 { 2025 /* SMSC9505 USB Ethernet Device */ 2026 USB_DEVICE(0x0424, 0x9505), 2027 .driver_info = (unsigned long) &smsc95xx_info, 2028 }, 2029 { 2030 /* SMSC9500A USB Ethernet Device */ 2031 USB_DEVICE(0x0424, 0x9E00), 2032 .driver_info = (unsigned long) &smsc95xx_info, 2033 }, 2034 { 2035 /* SMSC9505A USB Ethernet Device */ 2036 USB_DEVICE(0x0424, 0x9E01), 2037 .driver_info = (unsigned long) &smsc95xx_info, 2038 }, 2039 { 2040 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2041 USB_DEVICE(0x0424, 0xec00), 2042 .driver_info = (unsigned long) &smsc95xx_info, 2043 }, 2044 { 2045 /* SMSC9500 USB Ethernet Device (SAL10) */ 2046 USB_DEVICE(0x0424, 0x9900), 2047 .driver_info = (unsigned long) &smsc95xx_info, 2048 }, 2049 { 2050 /* SMSC9505 USB Ethernet Device (SAL10) */ 2051 USB_DEVICE(0x0424, 0x9901), 2052 .driver_info = (unsigned long) &smsc95xx_info, 2053 }, 2054 { 2055 /* SMSC9500A USB Ethernet Device (SAL10) */ 2056 USB_DEVICE(0x0424, 0x9902), 2057 .driver_info = (unsigned long) &smsc95xx_info, 2058 }, 2059 { 2060 /* SMSC9505A USB Ethernet Device (SAL10) */ 2061 USB_DEVICE(0x0424, 0x9903), 2062 .driver_info = (unsigned long) &smsc95xx_info, 2063 }, 2064 { 2065 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2066 USB_DEVICE(0x0424, 0x9904), 2067 .driver_info = (unsigned long) &smsc95xx_info, 2068 }, 2069 { 2070 /* SMSC9500A USB Ethernet Device (HAL) */ 2071 USB_DEVICE(0x0424, 0x9905), 2072 .driver_info = (unsigned long) &smsc95xx_info, 2073 }, 2074 { 2075 /* SMSC9505A USB Ethernet Device (HAL) */ 2076 USB_DEVICE(0x0424, 0x9906), 2077 .driver_info = (unsigned long) &smsc95xx_info, 2078 }, 2079 { 2080 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2081 USB_DEVICE(0x0424, 0x9907), 2082 .driver_info = (unsigned long) &smsc95xx_info, 2083 }, 2084 { 2085 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2086 USB_DEVICE(0x0424, 0x9908), 2087 .driver_info = (unsigned long) &smsc95xx_info, 2088 }, 2089 { 2090 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2091 USB_DEVICE(0x0424, 0x9909), 2092 .driver_info = (unsigned long) &smsc95xx_info, 2093 }, 2094 { 2095 /* SMSC LAN9530 USB Ethernet Device */ 2096 USB_DEVICE(0x0424, 0x9530), 2097 .driver_info = (unsigned long) &smsc95xx_info, 2098 }, 2099 { 2100 /* SMSC LAN9730 USB Ethernet Device */ 2101 USB_DEVICE(0x0424, 0x9730), 2102 .driver_info = (unsigned long) &smsc95xx_info, 2103 }, 2104 { 2105 /* SMSC LAN89530 USB Ethernet Device */ 2106 USB_DEVICE(0x0424, 0x9E08), 2107 .driver_info = (unsigned long) &smsc95xx_info, 2108 }, 2109 { 2110 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */ 2111 USB_DEVICE(0x0878, 0x1400), 2112 .driver_info = (unsigned long)&smsc95xx_info, 2113 }, 2114 { 2115 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ 2116 USB_DEVICE(0x184F, 0x0051), 2117 .driver_info = (unsigned long)&smsc95xx_info, 2118 }, 2119 { }, /* END */ 2120 }; 2121 MODULE_DEVICE_TABLE(usb, products); 2122 2123 static struct usb_driver smsc95xx_driver = { 2124 .name = "smsc95xx", 2125 .id_table = products, 2126 .probe = usbnet_probe, 2127 .suspend = smsc95xx_suspend, 2128 .resume = smsc95xx_resume, 2129 .reset_resume = smsc95xx_reset_resume, 2130 .disconnect = usbnet_disconnect, 2131 .disable_hub_initiated_lpm = 1, 2132 .supports_autosuspend = 1, 2133 }; 2134 2135 module_usb_driver(smsc95xx_driver); 2136 2137 MODULE_AUTHOR("Nancy Lin"); 2138 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2139 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2140 MODULE_LICENSE("GPL"); 2141