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