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 struct irq_chip irqchip; 70 struct irq_domain *irqdomain; 71 struct fwnode_handle *irqfwnode; 72 struct mii_bus *mdiobus; 73 struct phy_device *phydev; 74 }; 75 76 static bool turbo_mode = true; 77 module_param(turbo_mode, bool, 0644); 78 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 79 80 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index, 81 u32 *data, int in_pm) 82 { 83 u32 buf; 84 int ret; 85 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 86 87 BUG_ON(!dev); 88 89 if (!in_pm) 90 fn = usbnet_read_cmd; 91 else 92 fn = usbnet_read_cmd_nopm; 93 94 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 95 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 96 0, index, &buf, 4); 97 if (ret < 0) { 98 if (ret != -ENODEV) 99 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 100 index, ret); 101 return ret; 102 } 103 104 le32_to_cpus(&buf); 105 *data = buf; 106 107 return ret; 108 } 109 110 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index, 111 u32 data, int in_pm) 112 { 113 u32 buf; 114 int ret; 115 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 116 117 BUG_ON(!dev); 118 119 if (!in_pm) 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 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index, 138 u32 *data) 139 { 140 return __smsc95xx_read_reg(dev, index, data, 1); 141 } 142 143 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index, 144 u32 data) 145 { 146 return __smsc95xx_write_reg(dev, index, data, 1); 147 } 148 149 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 150 u32 *data) 151 { 152 return __smsc95xx_read_reg(dev, index, data, 0); 153 } 154 155 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 156 u32 data) 157 { 158 return __smsc95xx_write_reg(dev, index, data, 0); 159 } 160 161 /* Loop until the read is completed with timeout 162 * called with phy_mutex held */ 163 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev, 164 int in_pm) 165 { 166 unsigned long start_time = jiffies; 167 u32 val; 168 int ret; 169 170 do { 171 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm); 172 if (ret < 0) { 173 /* Ignore -ENODEV error during disconnect() */ 174 if (ret == -ENODEV) 175 return 0; 176 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 177 return ret; 178 } 179 180 if (!(val & MII_BUSY_)) 181 return 0; 182 } while (!time_after(jiffies, start_time + HZ)); 183 184 return -EIO; 185 } 186 187 static u32 mii_address_cmd(int phy_id, int idx, u16 op) 188 { 189 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; 190 } 191 192 static int __smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx, 193 int in_pm) 194 { 195 u32 val, addr; 196 int ret; 197 198 mutex_lock(&dev->phy_mutex); 199 200 /* confirm MII not busy */ 201 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 202 if (ret < 0) { 203 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 204 goto done; 205 } 206 207 /* set the address, index & direction (read from PHY) */ 208 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); 209 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 210 if (ret < 0) { 211 if (ret != -ENODEV) 212 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 213 goto done; 214 } 215 216 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 217 if (ret < 0) { 218 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 219 goto done; 220 } 221 222 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm); 223 if (ret < 0) { 224 if (ret != -ENODEV) 225 netdev_warn(dev->net, "Error reading MII_DATA\n"); 226 goto done; 227 } 228 229 ret = (u16)(val & 0xFFFF); 230 231 done: 232 mutex_unlock(&dev->phy_mutex); 233 234 /* Ignore -ENODEV error during disconnect() */ 235 if (ret == -ENODEV) 236 return 0; 237 return ret; 238 } 239 240 static void __smsc95xx_mdio_write(struct usbnet *dev, int phy_id, 241 int idx, int regval, int in_pm) 242 { 243 u32 val, addr; 244 int ret; 245 246 mutex_lock(&dev->phy_mutex); 247 248 /* confirm MII not busy */ 249 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 250 if (ret < 0) { 251 netdev_warn(dev->net, "%s: MII is busy\n", __func__); 252 goto done; 253 } 254 255 val = regval; 256 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm); 257 if (ret < 0) { 258 if (ret != -ENODEV) 259 netdev_warn(dev->net, "Error writing MII_DATA\n"); 260 goto done; 261 } 262 263 /* set the address, index & direction (write to PHY) */ 264 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); 265 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 266 if (ret < 0) { 267 if (ret != -ENODEV) 268 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 269 goto done; 270 } 271 272 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 273 if (ret < 0) { 274 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 275 goto done; 276 } 277 278 done: 279 mutex_unlock(&dev->phy_mutex); 280 } 281 282 static int smsc95xx_mdio_read_nopm(struct usbnet *dev, int idx) 283 { 284 struct smsc95xx_priv *pdata = dev->driver_priv; 285 286 return __smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, idx, 1); 287 } 288 289 static void smsc95xx_mdio_write_nopm(struct usbnet *dev, int idx, int regval) 290 { 291 struct smsc95xx_priv *pdata = dev->driver_priv; 292 293 __smsc95xx_mdio_write(dev, pdata->phydev->mdio.addr, idx, regval, 1); 294 } 295 296 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 297 { 298 struct usbnet *dev = bus->priv; 299 300 return __smsc95xx_mdio_read(dev, phy_id, idx, 0); 301 } 302 303 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 304 u16 regval) 305 { 306 struct usbnet *dev = bus->priv; 307 308 __smsc95xx_mdio_write(dev, phy_id, idx, regval, 0); 309 return 0; 310 } 311 312 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 313 { 314 unsigned long start_time = jiffies; 315 u32 val; 316 int ret; 317 318 do { 319 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 320 if (ret < 0) { 321 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 322 return ret; 323 } 324 325 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 326 break; 327 udelay(40); 328 } while (!time_after(jiffies, start_time + HZ)); 329 330 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 331 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 332 return -EIO; 333 } 334 335 return 0; 336 } 337 338 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 339 { 340 unsigned long start_time = jiffies; 341 u32 val; 342 int ret; 343 344 do { 345 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 346 if (ret < 0) { 347 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 348 return ret; 349 } 350 351 if (!(val & E2P_CMD_BUSY_)) 352 return 0; 353 354 udelay(40); 355 } while (!time_after(jiffies, start_time + HZ)); 356 357 netdev_warn(dev->net, "EEPROM is busy\n"); 358 return -EIO; 359 } 360 361 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 362 u8 *data) 363 { 364 u32 val; 365 int i, ret; 366 367 BUG_ON(!dev); 368 BUG_ON(!data); 369 370 ret = smsc95xx_eeprom_confirm_not_busy(dev); 371 if (ret) 372 return ret; 373 374 for (i = 0; i < length; i++) { 375 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 376 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 377 if (ret < 0) { 378 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 379 return ret; 380 } 381 382 ret = smsc95xx_wait_eeprom(dev); 383 if (ret < 0) 384 return ret; 385 386 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 387 if (ret < 0) { 388 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 389 return ret; 390 } 391 392 data[i] = val & 0xFF; 393 offset++; 394 } 395 396 return 0; 397 } 398 399 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 400 u8 *data) 401 { 402 u32 val; 403 int i, ret; 404 405 BUG_ON(!dev); 406 BUG_ON(!data); 407 408 ret = smsc95xx_eeprom_confirm_not_busy(dev); 409 if (ret) 410 return ret; 411 412 /* Issue write/erase enable command */ 413 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 414 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 415 if (ret < 0) { 416 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 417 return ret; 418 } 419 420 ret = smsc95xx_wait_eeprom(dev); 421 if (ret < 0) 422 return ret; 423 424 for (i = 0; i < length; i++) { 425 426 /* Fill data register */ 427 val = data[i]; 428 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 429 if (ret < 0) { 430 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 431 return ret; 432 } 433 434 /* Send "write" command */ 435 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 436 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 437 if (ret < 0) { 438 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 439 return ret; 440 } 441 442 ret = smsc95xx_wait_eeprom(dev); 443 if (ret < 0) 444 return ret; 445 446 offset++; 447 } 448 449 return 0; 450 } 451 452 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 453 u32 data) 454 { 455 const u16 size = 4; 456 u32 buf; 457 int ret; 458 459 buf = data; 460 cpu_to_le32s(&buf); 461 462 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 463 USB_DIR_OUT | USB_TYPE_VENDOR | 464 USB_RECIP_DEVICE, 465 0, index, &buf, size); 466 if (ret < 0) 467 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 468 ret); 469 return ret; 470 } 471 472 /* returns hash bit number for given MAC address 473 * example: 474 * 01 00 5E 00 00 01 -> returns bit number 31 */ 475 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 476 { 477 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 478 } 479 480 static void smsc95xx_set_multicast(struct net_device *netdev) 481 { 482 struct usbnet *dev = netdev_priv(netdev); 483 struct smsc95xx_priv *pdata = dev->driver_priv; 484 unsigned long flags; 485 int ret; 486 487 pdata->hash_hi = 0; 488 pdata->hash_lo = 0; 489 490 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 491 492 if (dev->net->flags & IFF_PROMISC) { 493 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 494 pdata->mac_cr |= MAC_CR_PRMS_; 495 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 496 } else if (dev->net->flags & IFF_ALLMULTI) { 497 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 498 pdata->mac_cr |= MAC_CR_MCPAS_; 499 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 500 } else if (!netdev_mc_empty(dev->net)) { 501 struct netdev_hw_addr *ha; 502 503 pdata->mac_cr |= MAC_CR_HPFILT_; 504 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 505 506 netdev_for_each_mc_addr(ha, netdev) { 507 u32 bitnum = smsc95xx_hash(ha->addr); 508 u32 mask = 0x01 << (bitnum & 0x1F); 509 if (bitnum & 0x20) 510 pdata->hash_hi |= mask; 511 else 512 pdata->hash_lo |= mask; 513 } 514 515 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 516 pdata->hash_hi, pdata->hash_lo); 517 } else { 518 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 519 pdata->mac_cr &= 520 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 521 } 522 523 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 524 525 /* Initiate async writes, as we can't wait for completion here */ 526 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 527 if (ret < 0) 528 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 529 530 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 531 if (ret < 0) 532 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 533 534 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 535 if (ret < 0) 536 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 537 } 538 539 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) 540 { 541 u32 flow = 0, afc_cfg; 542 struct smsc95xx_priv *pdata = dev->driver_priv; 543 bool tx_pause, rx_pause; 544 545 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 546 if (ret < 0) 547 return ret; 548 549 if (pdata->phydev->duplex == DUPLEX_FULL) { 550 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); 551 552 if (rx_pause) 553 flow = 0xFFFF0002; 554 555 if (tx_pause) { 556 afc_cfg |= 0xF; 557 flow |= 0xFFFF0000; 558 } else { 559 afc_cfg &= ~0xF; 560 } 561 562 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 563 rx_pause ? "enabled" : "disabled", 564 tx_pause ? "enabled" : "disabled"); 565 } else { 566 netif_dbg(dev, link, dev->net, "half duplex\n"); 567 afc_cfg |= 0xF; 568 } 569 570 ret = smsc95xx_write_reg(dev, FLOW, flow); 571 if (ret < 0) 572 return ret; 573 574 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 575 } 576 577 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) 578 { 579 struct smsc95xx_priv *pdata = dev->driver_priv; 580 unsigned long flags; 581 int ret; 582 583 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 584 if (pdata->phydev->duplex != DUPLEX_FULL) { 585 pdata->mac_cr &= ~MAC_CR_FDPX_; 586 pdata->mac_cr |= MAC_CR_RCVOWN_; 587 } else { 588 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 589 pdata->mac_cr |= MAC_CR_FDPX_; 590 } 591 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 592 593 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 594 if (ret < 0) { 595 if (ret != -ENODEV) 596 netdev_warn(dev->net, 597 "Error updating MAC full duplex mode\n"); 598 return; 599 } 600 601 ret = smsc95xx_phy_update_flowcontrol(dev); 602 if (ret < 0) 603 netdev_warn(dev->net, "Error updating PHY flow control\n"); 604 } 605 606 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 607 { 608 struct smsc95xx_priv *pdata = dev->driver_priv; 609 unsigned long flags; 610 u32 intdata; 611 612 if (urb->actual_length != 4) { 613 netdev_warn(dev->net, "unexpected urb length %d\n", 614 urb->actual_length); 615 return; 616 } 617 618 intdata = get_unaligned_le32(urb->transfer_buffer); 619 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 620 621 local_irq_save(flags); 622 623 if (intdata & INT_ENP_PHY_INT_) 624 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ); 625 else 626 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 627 intdata); 628 629 local_irq_restore(flags); 630 } 631 632 /* Enable or disable Tx & Rx checksum offload engines */ 633 static int smsc95xx_set_features(struct net_device *netdev, 634 netdev_features_t features) 635 { 636 struct usbnet *dev = netdev_priv(netdev); 637 u32 read_buf; 638 int ret; 639 640 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 641 if (ret < 0) 642 return ret; 643 644 if (features & NETIF_F_IP_CSUM) 645 read_buf |= Tx_COE_EN_; 646 else 647 read_buf &= ~Tx_COE_EN_; 648 649 if (features & NETIF_F_RXCSUM) 650 read_buf |= Rx_COE_EN_; 651 else 652 read_buf &= ~Rx_COE_EN_; 653 654 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 655 if (ret < 0) 656 return ret; 657 658 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 659 return 0; 660 } 661 662 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 663 { 664 return MAX_EEPROM_SIZE; 665 } 666 667 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 668 struct ethtool_eeprom *ee, u8 *data) 669 { 670 struct usbnet *dev = netdev_priv(netdev); 671 672 ee->magic = LAN95XX_EEPROM_MAGIC; 673 674 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 675 } 676 677 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 678 struct ethtool_eeprom *ee, u8 *data) 679 { 680 struct usbnet *dev = netdev_priv(netdev); 681 682 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 683 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 684 ee->magic); 685 return -EINVAL; 686 } 687 688 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 689 } 690 691 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 692 { 693 /* all smsc95xx registers */ 694 return COE_CR - ID_REV + sizeof(u32); 695 } 696 697 static void 698 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 699 void *buf) 700 { 701 struct usbnet *dev = netdev_priv(netdev); 702 unsigned int i, j; 703 int retval; 704 u32 *data = buf; 705 706 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 707 if (retval < 0) { 708 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 709 return; 710 } 711 712 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 713 retval = smsc95xx_read_reg(dev, i, &data[j]); 714 if (retval < 0) { 715 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 716 return; 717 } 718 } 719 } 720 721 static void smsc95xx_ethtool_get_wol(struct net_device *net, 722 struct ethtool_wolinfo *wolinfo) 723 { 724 struct usbnet *dev = netdev_priv(net); 725 struct smsc95xx_priv *pdata = dev->driver_priv; 726 727 wolinfo->supported = SUPPORTED_WAKE; 728 wolinfo->wolopts = pdata->wolopts; 729 } 730 731 static int smsc95xx_ethtool_set_wol(struct net_device *net, 732 struct ethtool_wolinfo *wolinfo) 733 { 734 struct usbnet *dev = netdev_priv(net); 735 struct smsc95xx_priv *pdata = dev->driver_priv; 736 int ret; 737 738 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 739 return -EINVAL; 740 741 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 742 743 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 744 if (ret < 0) 745 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 746 747 return ret; 748 } 749 750 static u32 smsc95xx_get_link(struct net_device *net) 751 { 752 phy_read_status(net->phydev); 753 return net->phydev->link; 754 } 755 756 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, 757 u8 *data) 758 { 759 switch (sset) { 760 case ETH_SS_TEST: 761 net_selftest_get_strings(data); 762 break; 763 } 764 } 765 766 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) 767 { 768 switch (sset) { 769 case ETH_SS_TEST: 770 return net_selftest_get_count(); 771 default: 772 return -EOPNOTSUPP; 773 } 774 } 775 776 static const struct ethtool_ops smsc95xx_ethtool_ops = { 777 .get_link = smsc95xx_get_link, 778 .nway_reset = phy_ethtool_nway_reset, 779 .get_drvinfo = usbnet_get_drvinfo, 780 .get_msglevel = usbnet_get_msglevel, 781 .set_msglevel = usbnet_set_msglevel, 782 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 783 .get_eeprom = smsc95xx_ethtool_get_eeprom, 784 .set_eeprom = smsc95xx_ethtool_set_eeprom, 785 .get_regs_len = smsc95xx_ethtool_getregslen, 786 .get_regs = smsc95xx_ethtool_getregs, 787 .get_wol = smsc95xx_ethtool_get_wol, 788 .set_wol = smsc95xx_ethtool_set_wol, 789 .get_link_ksettings = phy_ethtool_get_link_ksettings, 790 .set_link_ksettings = phy_ethtool_set_link_ksettings, 791 .get_ts_info = ethtool_op_get_ts_info, 792 .self_test = net_selftest, 793 .get_strings = smsc95xx_ethtool_get_strings, 794 .get_sset_count = smsc95xx_ethtool_get_sset_count, 795 }; 796 797 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 798 { 799 if (!netif_running(netdev)) 800 return -EINVAL; 801 802 return phy_mii_ioctl(netdev->phydev, rq, cmd); 803 } 804 805 static void smsc95xx_init_mac_address(struct usbnet *dev) 806 { 807 u8 addr[ETH_ALEN]; 808 809 /* maybe the boot loader passed the MAC address in devicetree */ 810 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 811 if (is_valid_ether_addr(dev->net->dev_addr)) { 812 /* device tree values are valid so use them */ 813 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 814 return; 815 } 816 } 817 818 /* try reading mac address from EEPROM */ 819 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 820 eth_hw_addr_set(dev->net, addr); 821 if (is_valid_ether_addr(dev->net->dev_addr)) { 822 /* eeprom values are valid so use them */ 823 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 824 return; 825 } 826 } 827 828 /* no useful static MAC address found. generate a random one */ 829 eth_hw_addr_random(dev->net); 830 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 831 } 832 833 static int smsc95xx_set_mac_address(struct usbnet *dev) 834 { 835 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 836 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 837 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 838 int ret; 839 840 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 841 if (ret < 0) 842 return ret; 843 844 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 845 } 846 847 /* starts the TX path */ 848 static int smsc95xx_start_tx_path(struct usbnet *dev) 849 { 850 struct smsc95xx_priv *pdata = dev->driver_priv; 851 unsigned long flags; 852 int ret; 853 854 /* Enable Tx at MAC */ 855 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 856 pdata->mac_cr |= MAC_CR_TXEN_; 857 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 858 859 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 860 if (ret < 0) 861 return ret; 862 863 /* Enable Tx at SCSRs */ 864 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 865 } 866 867 /* Starts the Receive path */ 868 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 869 { 870 struct smsc95xx_priv *pdata = dev->driver_priv; 871 unsigned long flags; 872 873 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 874 pdata->mac_cr |= MAC_CR_RXEN_; 875 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 876 877 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 878 } 879 880 static int smsc95xx_reset(struct usbnet *dev) 881 { 882 struct smsc95xx_priv *pdata = dev->driver_priv; 883 u32 read_buf, write_buf, burst_cap; 884 int ret = 0, timeout; 885 886 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 887 888 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 889 if (ret < 0) 890 return ret; 891 892 timeout = 0; 893 do { 894 msleep(10); 895 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 896 if (ret < 0) 897 return ret; 898 timeout++; 899 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 900 901 if (timeout >= 100) { 902 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 903 return ret; 904 } 905 906 ret = smsc95xx_set_mac_address(dev); 907 if (ret < 0) 908 return ret; 909 910 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 911 dev->net->dev_addr); 912 913 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 914 if (ret < 0) 915 return ret; 916 917 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 918 read_buf); 919 920 read_buf |= HW_CFG_BIR_; 921 922 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 923 if (ret < 0) 924 return ret; 925 926 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 927 if (ret < 0) 928 return ret; 929 930 netif_dbg(dev, ifup, dev->net, 931 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 932 read_buf); 933 934 if (!turbo_mode) { 935 burst_cap = 0; 936 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 937 } else if (dev->udev->speed == USB_SPEED_HIGH) { 938 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 939 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 940 } else { 941 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 942 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 943 } 944 945 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 946 (ulong)dev->rx_urb_size); 947 948 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 949 if (ret < 0) 950 return ret; 951 952 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 953 if (ret < 0) 954 return ret; 955 956 netif_dbg(dev, ifup, dev->net, 957 "Read Value from BURST_CAP after writing: 0x%08x\n", 958 read_buf); 959 960 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 961 if (ret < 0) 962 return ret; 963 964 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 965 if (ret < 0) 966 return ret; 967 968 netif_dbg(dev, ifup, dev->net, 969 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 970 read_buf); 971 972 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 973 if (ret < 0) 974 return ret; 975 976 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 977 read_buf); 978 979 if (turbo_mode) 980 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 981 982 read_buf &= ~HW_CFG_RXDOFF_; 983 984 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 985 read_buf |= NET_IP_ALIGN << 9; 986 987 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 988 if (ret < 0) 989 return ret; 990 991 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 992 if (ret < 0) 993 return ret; 994 995 netif_dbg(dev, ifup, dev->net, 996 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 997 998 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 999 if (ret < 0) 1000 return ret; 1001 1002 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1003 if (ret < 0) 1004 return ret; 1005 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1006 1007 /* Configure GPIO pins as LED outputs */ 1008 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1009 LED_GPIO_CFG_FDX_LED; 1010 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 1011 if (ret < 0) 1012 return ret; 1013 1014 /* Init Tx */ 1015 ret = smsc95xx_write_reg(dev, FLOW, 0); 1016 if (ret < 0) 1017 return ret; 1018 1019 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1020 if (ret < 0) 1021 return ret; 1022 1023 /* Don't need mac_cr_lock during initialisation */ 1024 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1025 if (ret < 0) 1026 return ret; 1027 1028 /* Init Rx */ 1029 /* Set Vlan */ 1030 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1031 if (ret < 0) 1032 return ret; 1033 1034 /* Enable or disable checksum offload engines */ 1035 ret = smsc95xx_set_features(dev->net, dev->net->features); 1036 if (ret < 0) { 1037 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1038 return ret; 1039 } 1040 1041 smsc95xx_set_multicast(dev->net); 1042 1043 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1044 if (ret < 0) 1045 return ret; 1046 1047 /* enable PHY interrupts */ 1048 read_buf |= INT_EP_CTL_PHY_INT_; 1049 1050 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1051 if (ret < 0) 1052 return ret; 1053 1054 ret = smsc95xx_start_tx_path(dev); 1055 if (ret < 0) { 1056 netdev_warn(dev->net, "Failed to start TX path\n"); 1057 return ret; 1058 } 1059 1060 ret = smsc95xx_start_rx_path(dev, 0); 1061 if (ret < 0) { 1062 netdev_warn(dev->net, "Failed to start RX path\n"); 1063 return ret; 1064 } 1065 1066 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1067 return 0; 1068 } 1069 1070 static const struct net_device_ops smsc95xx_netdev_ops = { 1071 .ndo_open = usbnet_open, 1072 .ndo_stop = usbnet_stop, 1073 .ndo_start_xmit = usbnet_start_xmit, 1074 .ndo_tx_timeout = usbnet_tx_timeout, 1075 .ndo_change_mtu = usbnet_change_mtu, 1076 .ndo_get_stats64 = dev_get_tstats64, 1077 .ndo_set_mac_address = eth_mac_addr, 1078 .ndo_validate_addr = eth_validate_addr, 1079 .ndo_eth_ioctl = smsc95xx_ioctl, 1080 .ndo_set_rx_mode = smsc95xx_set_multicast, 1081 .ndo_set_features = smsc95xx_set_features, 1082 }; 1083 1084 static void smsc95xx_handle_link_change(struct net_device *net) 1085 { 1086 struct usbnet *dev = netdev_priv(net); 1087 1088 phy_print_status(net->phydev); 1089 smsc95xx_mac_update_fullduplex(dev); 1090 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); 1091 } 1092 1093 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1094 { 1095 struct smsc95xx_priv *pdata; 1096 bool is_internal_phy; 1097 char usb_path[64]; 1098 int ret, phy_irq; 1099 u32 val; 1100 1101 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1102 1103 ret = usbnet_get_endpoints(dev, intf); 1104 if (ret < 0) { 1105 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1106 return ret; 1107 } 1108 1109 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 1110 if (!pdata) 1111 return -ENOMEM; 1112 1113 dev->driver_priv = pdata; 1114 1115 spin_lock_init(&pdata->mac_cr_lock); 1116 1117 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1118 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1119 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1120 * it is transmitted as all ones. The zero transmitted checksum means 1121 * transmitter generated no checksum. Hence, enable csum offload only 1122 * for ipv4 packets. 1123 */ 1124 if (DEFAULT_TX_CSUM_ENABLE) 1125 dev->net->features |= NETIF_F_IP_CSUM; 1126 if (DEFAULT_RX_CSUM_ENABLE) 1127 dev->net->features |= NETIF_F_RXCSUM; 1128 1129 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1130 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1131 1132 smsc95xx_init_mac_address(dev); 1133 1134 /* Init all registers */ 1135 ret = smsc95xx_reset(dev); 1136 if (ret) 1137 goto free_pdata; 1138 1139 /* create irq domain for use by PHY driver and GPIO consumers */ 1140 usb_make_path(dev->udev, usb_path, sizeof(usb_path)); 1141 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path); 1142 if (!pdata->irqfwnode) { 1143 ret = -ENOMEM; 1144 goto free_pdata; 1145 } 1146 1147 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode, 1148 SMSC95XX_NR_IRQS, 1149 &irq_domain_simple_ops, 1150 pdata); 1151 if (!pdata->irqdomain) { 1152 ret = -ENOMEM; 1153 goto free_irqfwnode; 1154 } 1155 1156 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ); 1157 if (!phy_irq) { 1158 ret = -ENOENT; 1159 goto remove_irqdomain; 1160 } 1161 1162 pdata->irqchip = dummy_irq_chip; 1163 pdata->irqchip.name = SMSC_CHIPNAME; 1164 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip, 1165 handle_simple_irq, "phy"); 1166 1167 pdata->mdiobus = mdiobus_alloc(); 1168 if (!pdata->mdiobus) { 1169 ret = -ENOMEM; 1170 goto dispose_irq; 1171 } 1172 1173 ret = smsc95xx_read_reg(dev, HW_CFG, &val); 1174 if (ret < 0) 1175 goto free_mdio; 1176 1177 is_internal_phy = !(val & HW_CFG_PSEL_); 1178 if (is_internal_phy) 1179 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); 1180 1181 pdata->mdiobus->priv = dev; 1182 pdata->mdiobus->read = smsc95xx_mdiobus_read; 1183 pdata->mdiobus->write = smsc95xx_mdiobus_write; 1184 pdata->mdiobus->name = "smsc95xx-mdiobus"; 1185 pdata->mdiobus->parent = &dev->udev->dev; 1186 1187 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), 1188 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); 1189 1190 ret = mdiobus_register(pdata->mdiobus); 1191 if (ret) { 1192 netdev_err(dev->net, "Could not register MDIO bus\n"); 1193 goto free_mdio; 1194 } 1195 1196 pdata->phydev = phy_find_first(pdata->mdiobus); 1197 if (!pdata->phydev) { 1198 netdev_err(dev->net, "no PHY found\n"); 1199 ret = -ENODEV; 1200 goto unregister_mdio; 1201 } 1202 1203 pdata->phydev->irq = phy_irq; 1204 pdata->phydev->is_internal = is_internal_phy; 1205 1206 /* detect device revision as different features may be available */ 1207 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1208 if (ret < 0) 1209 goto unregister_mdio; 1210 1211 val >>= 16; 1212 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1213 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1214 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1215 FEATURE_PHY_NLP_CROSSOVER | 1216 FEATURE_REMOTE_WAKEUP); 1217 else if (val == ID_REV_CHIP_ID_9512_) 1218 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1219 1220 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1221 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1222 dev->net->flags |= IFF_MULTICAST; 1223 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1224 dev->net->min_mtu = ETH_MIN_MTU; 1225 dev->net->max_mtu = ETH_DATA_LEN; 1226 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1227 1228 ret = phy_connect_direct(dev->net, pdata->phydev, 1229 &smsc95xx_handle_link_change, 1230 PHY_INTERFACE_MODE_MII); 1231 if (ret) { 1232 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); 1233 goto unregister_mdio; 1234 } 1235 1236 phy_attached_info(dev->net->phydev); 1237 1238 return 0; 1239 1240 unregister_mdio: 1241 mdiobus_unregister(pdata->mdiobus); 1242 1243 free_mdio: 1244 mdiobus_free(pdata->mdiobus); 1245 1246 dispose_irq: 1247 irq_dispose_mapping(phy_irq); 1248 1249 remove_irqdomain: 1250 irq_domain_remove(pdata->irqdomain); 1251 1252 free_irqfwnode: 1253 irq_domain_free_fwnode(pdata->irqfwnode); 1254 1255 free_pdata: 1256 kfree(pdata); 1257 return ret; 1258 } 1259 1260 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1261 { 1262 struct smsc95xx_priv *pdata = dev->driver_priv; 1263 1264 phy_disconnect(dev->net->phydev); 1265 mdiobus_unregister(pdata->mdiobus); 1266 mdiobus_free(pdata->mdiobus); 1267 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); 1268 irq_domain_remove(pdata->irqdomain); 1269 irq_domain_free_fwnode(pdata->irqfwnode); 1270 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1271 kfree(pdata); 1272 } 1273 1274 static int smsc95xx_start_phy(struct usbnet *dev) 1275 { 1276 phy_start(dev->net->phydev); 1277 1278 return 0; 1279 } 1280 1281 static int smsc95xx_stop(struct usbnet *dev) 1282 { 1283 phy_stop(dev->net->phydev); 1284 1285 return 0; 1286 } 1287 1288 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1289 { 1290 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1291 return crc << ((filter % 2) * 16); 1292 } 1293 1294 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1295 { 1296 int ret; 1297 1298 /* first, a dummy read, needed to latch some MII phys */ 1299 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1300 if (ret < 0) 1301 return ret; 1302 1303 ret = smsc95xx_mdio_read_nopm(dev, MII_BMSR); 1304 if (ret < 0) 1305 return ret; 1306 1307 return !!(ret & BMSR_LSTATUS); 1308 } 1309 1310 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1311 { 1312 struct smsc95xx_priv *pdata = dev->driver_priv; 1313 u32 val; 1314 int ret; 1315 1316 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1317 if (ret < 0) 1318 return ret; 1319 1320 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1321 val |= PM_CTL_SUS_MODE_0; 1322 1323 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1324 if (ret < 0) 1325 return ret; 1326 1327 /* clear wol status */ 1328 val &= ~PM_CTL_WUPS_; 1329 val |= PM_CTL_WUPS_WOL_; 1330 1331 /* enable energy detection */ 1332 if (pdata->wolopts & WAKE_PHY) 1333 val |= PM_CTL_WUPS_ED_; 1334 1335 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1336 if (ret < 0) 1337 return ret; 1338 1339 /* read back PM_CTRL */ 1340 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1341 if (ret < 0) 1342 return ret; 1343 1344 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1345 1346 return 0; 1347 } 1348 1349 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1350 { 1351 struct smsc95xx_priv *pdata = dev->driver_priv; 1352 u32 val; 1353 int ret; 1354 1355 /* reconfigure link pulse detection timing for 1356 * compatibility with non-standard link partners 1357 */ 1358 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1359 smsc95xx_mdio_write_nopm(dev, PHY_EDPD_CONFIG, 1360 PHY_EDPD_CONFIG_DEFAULT); 1361 1362 /* enable energy detect power-down mode */ 1363 ret = smsc95xx_mdio_read_nopm(dev, PHY_MODE_CTRL_STS); 1364 if (ret < 0) 1365 return ret; 1366 1367 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1368 1369 smsc95xx_mdio_write_nopm(dev, PHY_MODE_CTRL_STS, ret); 1370 1371 /* enter SUSPEND1 mode */ 1372 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1373 if (ret < 0) 1374 return ret; 1375 1376 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1377 val |= PM_CTL_SUS_MODE_1; 1378 1379 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1380 if (ret < 0) 1381 return ret; 1382 1383 /* clear wol status, enable energy detection */ 1384 val &= ~PM_CTL_WUPS_; 1385 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1386 1387 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1388 if (ret < 0) 1389 return ret; 1390 1391 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1392 1393 return 0; 1394 } 1395 1396 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1397 { 1398 struct smsc95xx_priv *pdata = dev->driver_priv; 1399 u32 val; 1400 int ret; 1401 1402 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1403 if (ret < 0) 1404 return ret; 1405 1406 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1407 val |= PM_CTL_SUS_MODE_2; 1408 1409 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1410 if (ret < 0) 1411 return ret; 1412 1413 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1414 1415 return 0; 1416 } 1417 1418 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1419 { 1420 struct smsc95xx_priv *pdata = dev->driver_priv; 1421 u32 val; 1422 int ret; 1423 1424 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1425 if (ret < 0) 1426 return ret; 1427 1428 if (val & RX_FIFO_INF_USED_) { 1429 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1430 return -EBUSY; 1431 } 1432 1433 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1434 if (ret < 0) 1435 return ret; 1436 1437 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1438 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1439 1440 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1441 if (ret < 0) 1442 return ret; 1443 1444 /* clear wol status */ 1445 val &= ~PM_CTL_WUPS_; 1446 val |= PM_CTL_WUPS_WOL_; 1447 1448 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1449 if (ret < 0) 1450 return ret; 1451 1452 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1453 1454 return 0; 1455 } 1456 1457 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1458 { 1459 struct smsc95xx_priv *pdata = dev->driver_priv; 1460 1461 if (!netif_running(dev->net)) { 1462 /* interface is ifconfig down so fully power down hw */ 1463 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1464 return smsc95xx_enter_suspend2(dev); 1465 } 1466 1467 if (!link_up) { 1468 /* link is down so enter EDPD mode, but only if device can 1469 * reliably resume from it. This check should be redundant 1470 * as current FEATURE_REMOTE_WAKEUP parts also support 1471 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1472 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1473 netdev_warn(dev->net, "EDPD not supported\n"); 1474 return -EBUSY; 1475 } 1476 1477 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1478 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1479 return smsc95xx_enter_suspend1(dev); 1480 } 1481 1482 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1483 return smsc95xx_enter_suspend3(dev); 1484 } 1485 1486 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1487 { 1488 struct usbnet *dev = usb_get_intfdata(intf); 1489 struct smsc95xx_priv *pdata = dev->driver_priv; 1490 u32 val, link_up; 1491 int ret; 1492 1493 ret = usbnet_suspend(intf, message); 1494 if (ret < 0) { 1495 netdev_warn(dev->net, "usbnet_suspend error\n"); 1496 return ret; 1497 } 1498 1499 if (pdata->suspend_flags) { 1500 netdev_warn(dev->net, "error during last resume\n"); 1501 pdata->suspend_flags = 0; 1502 } 1503 1504 /* determine if link is up using only _nopm functions */ 1505 link_up = smsc95xx_link_ok_nopm(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_nopm(dev, WUCSR, &val); 1523 if (ret < 0) 1524 goto done; 1525 1526 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1527 1528 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1529 if (ret < 0) 1530 goto done; 1531 1532 ret = smsc95xx_read_reg_nopm(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_nopm(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_nopm(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_nopm(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_nopm(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_nopm(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_nopm(dev, WUCSR, &val); 1657 if (ret < 0) 1658 goto done; 1659 1660 val |= WUCSR_WUFR_; 1661 1662 ret = smsc95xx_write_reg_nopm(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_nopm(dev, WUCSR, &val); 1670 if (ret < 0) 1671 goto done; 1672 1673 val |= WUCSR_MPR_; 1674 1675 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1676 if (ret < 0) 1677 goto done; 1678 } 1679 1680 /* enable/disable wakeup sources */ 1681 ret = smsc95xx_read_reg_nopm(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_nopm(dev, WUCSR, val); 1702 if (ret < 0) 1703 goto done; 1704 1705 /* enable wol wakeup source */ 1706 ret = smsc95xx_read_reg_nopm(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_nopm(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, 1); 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 return ret; 1736 } 1737 1738 static int smsc95xx_resume(struct usb_interface *intf) 1739 { 1740 struct usbnet *dev = usb_get_intfdata(intf); 1741 struct smsc95xx_priv *pdata; 1742 u8 suspend_flags; 1743 int ret; 1744 u32 val; 1745 1746 BUG_ON(!dev); 1747 pdata = dev->driver_priv; 1748 suspend_flags = pdata->suspend_flags; 1749 1750 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1751 1752 /* do this first to ensure it's cleared even in error case */ 1753 pdata->suspend_flags = 0; 1754 1755 if (suspend_flags & SUSPEND_ALLMODES) { 1756 /* clear wake-up sources */ 1757 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1758 if (ret < 0) 1759 return ret; 1760 1761 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1762 1763 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1764 if (ret < 0) 1765 return ret; 1766 1767 /* clear wake-up status */ 1768 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1769 if (ret < 0) 1770 return ret; 1771 1772 val &= ~PM_CTL_WOL_EN_; 1773 val |= PM_CTL_WUPS_; 1774 1775 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1776 if (ret < 0) 1777 return ret; 1778 } 1779 1780 phy_init_hw(pdata->phydev); 1781 1782 ret = usbnet_resume(intf); 1783 if (ret < 0) 1784 netdev_warn(dev->net, "usbnet_resume error\n"); 1785 1786 return ret; 1787 } 1788 1789 static int smsc95xx_reset_resume(struct usb_interface *intf) 1790 { 1791 struct usbnet *dev = usb_get_intfdata(intf); 1792 int ret; 1793 1794 ret = smsc95xx_reset(dev); 1795 if (ret < 0) 1796 return ret; 1797 1798 return smsc95xx_resume(intf); 1799 } 1800 1801 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1802 { 1803 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1804 skb->ip_summed = CHECKSUM_COMPLETE; 1805 skb_trim(skb, skb->len - 2); 1806 } 1807 1808 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1809 { 1810 /* This check is no longer done by usbnet */ 1811 if (skb->len < dev->net->hard_header_len) 1812 return 0; 1813 1814 while (skb->len > 0) { 1815 u32 header, align_count; 1816 struct sk_buff *ax_skb; 1817 unsigned char *packet; 1818 u16 size; 1819 1820 header = get_unaligned_le32(skb->data); 1821 skb_pull(skb, 4 + NET_IP_ALIGN); 1822 packet = skb->data; 1823 1824 /* get the packet length */ 1825 size = (u16)((header & RX_STS_FL_) >> 16); 1826 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1827 1828 if (unlikely(header & RX_STS_ES_)) { 1829 netif_dbg(dev, rx_err, dev->net, 1830 "Error header=0x%08x\n", header); 1831 dev->net->stats.rx_errors++; 1832 dev->net->stats.rx_dropped++; 1833 1834 if (header & RX_STS_CRC_) { 1835 dev->net->stats.rx_crc_errors++; 1836 } else { 1837 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1838 dev->net->stats.rx_frame_errors++; 1839 1840 if ((header & RX_STS_LE_) && 1841 (!(header & RX_STS_FT_))) 1842 dev->net->stats.rx_length_errors++; 1843 } 1844 } else { 1845 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1846 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1847 netif_dbg(dev, rx_err, dev->net, 1848 "size err header=0x%08x\n", header); 1849 return 0; 1850 } 1851 1852 /* last frame in this batch */ 1853 if (skb->len == size) { 1854 if (dev->net->features & NETIF_F_RXCSUM) 1855 smsc95xx_rx_csum_offload(skb); 1856 skb_trim(skb, skb->len - 4); /* remove fcs */ 1857 skb->truesize = size + sizeof(struct sk_buff); 1858 1859 return 1; 1860 } 1861 1862 ax_skb = skb_clone(skb, GFP_ATOMIC); 1863 if (unlikely(!ax_skb)) { 1864 netdev_warn(dev->net, "Error allocating skb\n"); 1865 return 0; 1866 } 1867 1868 ax_skb->len = size; 1869 ax_skb->data = packet; 1870 skb_set_tail_pointer(ax_skb, size); 1871 1872 if (dev->net->features & NETIF_F_RXCSUM) 1873 smsc95xx_rx_csum_offload(ax_skb); 1874 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1875 ax_skb->truesize = size + sizeof(struct sk_buff); 1876 1877 usbnet_skb_return(dev, ax_skb); 1878 } 1879 1880 skb_pull(skb, size); 1881 1882 /* padding bytes before the next frame starts */ 1883 if (skb->len) 1884 skb_pull(skb, align_count); 1885 } 1886 1887 return 1; 1888 } 1889 1890 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1891 { 1892 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1893 u16 high_16 = low_16 + skb->csum_offset; 1894 return (high_16 << 16) | low_16; 1895 } 1896 1897 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 1898 * transmission. This is fairly unlikely, only seems to trigger with some 1899 * short TCP ACK packets sent. 1900 * 1901 * Note, this calculation should probably check for the alignment of the 1902 * data as well, but a straight check for csum being in the last four bytes 1903 * of the packet should be ok for now. 1904 */ 1905 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 1906 { 1907 unsigned int len = skb->len - skb_checksum_start_offset(skb); 1908 1909 if (skb->len <= 45) 1910 return false; 1911 return skb->csum_offset < (len - (4 + 1)); 1912 } 1913 1914 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1915 struct sk_buff *skb, gfp_t flags) 1916 { 1917 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1918 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1919 u32 tx_cmd_a, tx_cmd_b; 1920 void *ptr; 1921 1922 /* We do not advertise SG, so skbs should be already linearized */ 1923 BUG_ON(skb_shinfo(skb)->nr_frags); 1924 1925 /* Make writable and expand header space by overhead if required */ 1926 if (skb_cow_head(skb, overhead)) { 1927 /* Must deallocate here as returning NULL to indicate error 1928 * means the skb won't be deallocated in the caller. 1929 */ 1930 dev_kfree_skb_any(skb); 1931 return NULL; 1932 } 1933 1934 tx_cmd_b = (u32)skb->len; 1935 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 1936 1937 if (csum) { 1938 if (!smsc95xx_can_tx_checksum(skb)) { 1939 /* workaround - hardware tx checksum does not work 1940 * properly with extremely small packets */ 1941 long csstart = skb_checksum_start_offset(skb); 1942 __wsum calc = csum_partial(skb->data + csstart, 1943 skb->len - csstart, 0); 1944 *((__sum16 *)(skb->data + csstart 1945 + skb->csum_offset)) = csum_fold(calc); 1946 1947 csum = false; 1948 } else { 1949 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1950 ptr = skb_push(skb, 4); 1951 put_unaligned_le32(csum_preamble, ptr); 1952 1953 tx_cmd_a += 4; 1954 tx_cmd_b += 4; 1955 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1956 } 1957 } 1958 1959 ptr = skb_push(skb, 8); 1960 put_unaligned_le32(tx_cmd_a, ptr); 1961 put_unaligned_le32(tx_cmd_b, ptr+4); 1962 1963 return skb; 1964 } 1965 1966 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1967 { 1968 struct smsc95xx_priv *pdata = dev->driver_priv; 1969 1970 dev->intf->needs_remote_wakeup = on; 1971 1972 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1973 return 0; 1974 1975 /* this chip revision isn't capable of remote wakeup */ 1976 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1977 1978 if (on) 1979 usb_autopm_get_interface_no_resume(dev->intf); 1980 else 1981 usb_autopm_put_interface(dev->intf); 1982 1983 return 0; 1984 } 1985 1986 static const struct driver_info smsc95xx_info = { 1987 .description = "smsc95xx USB 2.0 Ethernet", 1988 .bind = smsc95xx_bind, 1989 .unbind = smsc95xx_unbind, 1990 .reset = smsc95xx_reset, 1991 .check_connect = smsc95xx_start_phy, 1992 .stop = smsc95xx_stop, 1993 .rx_fixup = smsc95xx_rx_fixup, 1994 .tx_fixup = smsc95xx_tx_fixup, 1995 .status = smsc95xx_status, 1996 .manage_power = smsc95xx_manage_power, 1997 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 1998 }; 1999 2000 static const struct usb_device_id products[] = { 2001 { 2002 /* SMSC9500 USB Ethernet Device */ 2003 USB_DEVICE(0x0424, 0x9500), 2004 .driver_info = (unsigned long) &smsc95xx_info, 2005 }, 2006 { 2007 /* SMSC9505 USB Ethernet Device */ 2008 USB_DEVICE(0x0424, 0x9505), 2009 .driver_info = (unsigned long) &smsc95xx_info, 2010 }, 2011 { 2012 /* SMSC9500A USB Ethernet Device */ 2013 USB_DEVICE(0x0424, 0x9E00), 2014 .driver_info = (unsigned long) &smsc95xx_info, 2015 }, 2016 { 2017 /* SMSC9505A USB Ethernet Device */ 2018 USB_DEVICE(0x0424, 0x9E01), 2019 .driver_info = (unsigned long) &smsc95xx_info, 2020 }, 2021 { 2022 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2023 USB_DEVICE(0x0424, 0xec00), 2024 .driver_info = (unsigned long) &smsc95xx_info, 2025 }, 2026 { 2027 /* SMSC9500 USB Ethernet Device (SAL10) */ 2028 USB_DEVICE(0x0424, 0x9900), 2029 .driver_info = (unsigned long) &smsc95xx_info, 2030 }, 2031 { 2032 /* SMSC9505 USB Ethernet Device (SAL10) */ 2033 USB_DEVICE(0x0424, 0x9901), 2034 .driver_info = (unsigned long) &smsc95xx_info, 2035 }, 2036 { 2037 /* SMSC9500A USB Ethernet Device (SAL10) */ 2038 USB_DEVICE(0x0424, 0x9902), 2039 .driver_info = (unsigned long) &smsc95xx_info, 2040 }, 2041 { 2042 /* SMSC9505A USB Ethernet Device (SAL10) */ 2043 USB_DEVICE(0x0424, 0x9903), 2044 .driver_info = (unsigned long) &smsc95xx_info, 2045 }, 2046 { 2047 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2048 USB_DEVICE(0x0424, 0x9904), 2049 .driver_info = (unsigned long) &smsc95xx_info, 2050 }, 2051 { 2052 /* SMSC9500A USB Ethernet Device (HAL) */ 2053 USB_DEVICE(0x0424, 0x9905), 2054 .driver_info = (unsigned long) &smsc95xx_info, 2055 }, 2056 { 2057 /* SMSC9505A USB Ethernet Device (HAL) */ 2058 USB_DEVICE(0x0424, 0x9906), 2059 .driver_info = (unsigned long) &smsc95xx_info, 2060 }, 2061 { 2062 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2063 USB_DEVICE(0x0424, 0x9907), 2064 .driver_info = (unsigned long) &smsc95xx_info, 2065 }, 2066 { 2067 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2068 USB_DEVICE(0x0424, 0x9908), 2069 .driver_info = (unsigned long) &smsc95xx_info, 2070 }, 2071 { 2072 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2073 USB_DEVICE(0x0424, 0x9909), 2074 .driver_info = (unsigned long) &smsc95xx_info, 2075 }, 2076 { 2077 /* SMSC LAN9530 USB Ethernet Device */ 2078 USB_DEVICE(0x0424, 0x9530), 2079 .driver_info = (unsigned long) &smsc95xx_info, 2080 }, 2081 { 2082 /* SMSC LAN9730 USB Ethernet Device */ 2083 USB_DEVICE(0x0424, 0x9730), 2084 .driver_info = (unsigned long) &smsc95xx_info, 2085 }, 2086 { 2087 /* SMSC LAN89530 USB Ethernet Device */ 2088 USB_DEVICE(0x0424, 0x9E08), 2089 .driver_info = (unsigned long) &smsc95xx_info, 2090 }, 2091 { }, /* END */ 2092 }; 2093 MODULE_DEVICE_TABLE(usb, products); 2094 2095 static struct usb_driver smsc95xx_driver = { 2096 .name = "smsc95xx", 2097 .id_table = products, 2098 .probe = usbnet_probe, 2099 .suspend = smsc95xx_suspend, 2100 .resume = smsc95xx_resume, 2101 .reset_resume = smsc95xx_reset_resume, 2102 .disconnect = usbnet_disconnect, 2103 .disable_hub_initiated_lpm = 1, 2104 .supports_autosuspend = 1, 2105 }; 2106 2107 module_usb_driver(smsc95xx_driver); 2108 2109 MODULE_AUTHOR("Nancy Lin"); 2110 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2111 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2112 MODULE_LICENSE("GPL"); 2113