1 /*************************************************************************** 2 * 3 * Copyright (C) 2007-2008 SMSC 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License 7 * as published by the Free Software Foundation; either version 2 8 * of the License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, see <http://www.gnu.org/licenses/>. 17 * 18 *****************************************************************************/ 19 20 #include <linux/module.h> 21 #include <linux/kmod.h> 22 #include <linux/netdevice.h> 23 #include <linux/etherdevice.h> 24 #include <linux/ethtool.h> 25 #include <linux/mii.h> 26 #include <linux/usb.h> 27 #include <linux/bitrev.h> 28 #include <linux/crc16.h> 29 #include <linux/crc32.h> 30 #include <linux/usb/usbnet.h> 31 #include <linux/slab.h> 32 #include <linux/of_net.h> 33 #include "smsc95xx.h" 34 35 #define SMSC_CHIPNAME "smsc95xx" 36 #define SMSC_DRIVER_VERSION "1.0.4" 37 #define HS_USB_PKT_SIZE (512) 38 #define FS_USB_PKT_SIZE (64) 39 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) 40 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) 41 #define DEFAULT_BULK_IN_DELAY (0x00002000) 42 #define MAX_SINGLE_PACKET_SIZE (2048) 43 #define LAN95XX_EEPROM_MAGIC (0x9500) 44 #define EEPROM_MAC_OFFSET (0x01) 45 #define DEFAULT_TX_CSUM_ENABLE (true) 46 #define DEFAULT_RX_CSUM_ENABLE (true) 47 #define SMSC95XX_INTERNAL_PHY_ID (1) 48 #define SMSC95XX_TX_OVERHEAD (8) 49 #define SMSC95XX_TX_OVERHEAD_CSUM (12) 50 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ 51 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) 52 53 #define FEATURE_8_WAKEUP_FILTERS (0x01) 54 #define FEATURE_PHY_NLP_CROSSOVER (0x02) 55 #define FEATURE_REMOTE_WAKEUP (0x04) 56 57 #define SUSPEND_SUSPEND0 (0x01) 58 #define SUSPEND_SUSPEND1 (0x02) 59 #define SUSPEND_SUSPEND2 (0x04) 60 #define SUSPEND_SUSPEND3 (0x08) 61 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ 62 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) 63 64 #define CARRIER_CHECK_DELAY (2 * HZ) 65 66 struct smsc95xx_priv { 67 u32 mac_cr; 68 u32 hash_hi; 69 u32 hash_lo; 70 u32 wolopts; 71 spinlock_t mac_cr_lock; 72 u8 features; 73 u8 suspend_flags; 74 bool link_ok; 75 struct delayed_work carrier_check; 76 struct usbnet *dev; 77 }; 78 79 static bool turbo_mode = true; 80 module_param(turbo_mode, bool, 0644); 81 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 82 83 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index, 84 u32 *data, int in_pm) 85 { 86 u32 buf; 87 int ret; 88 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 89 90 BUG_ON(!dev); 91 92 if (!in_pm) 93 fn = usbnet_read_cmd; 94 else 95 fn = usbnet_read_cmd_nopm; 96 97 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 98 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 99 0, index, &buf, 4); 100 if (unlikely(ret < 0)) { 101 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 102 index, ret); 103 return ret; 104 } 105 106 le32_to_cpus(&buf); 107 *data = buf; 108 109 return ret; 110 } 111 112 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index, 113 u32 data, int in_pm) 114 { 115 u32 buf; 116 int ret; 117 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 118 119 BUG_ON(!dev); 120 121 if (!in_pm) 122 fn = usbnet_write_cmd; 123 else 124 fn = usbnet_write_cmd_nopm; 125 126 buf = data; 127 cpu_to_le32s(&buf); 128 129 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 130 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 131 0, index, &buf, 4); 132 if (unlikely(ret < 0)) 133 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 134 index, ret); 135 136 return ret; 137 } 138 139 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index, 140 u32 *data) 141 { 142 return __smsc95xx_read_reg(dev, index, data, 1); 143 } 144 145 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index, 146 u32 data) 147 { 148 return __smsc95xx_write_reg(dev, index, data, 1); 149 } 150 151 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 152 u32 *data) 153 { 154 return __smsc95xx_read_reg(dev, index, data, 0); 155 } 156 157 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 158 u32 data) 159 { 160 return __smsc95xx_write_reg(dev, index, data, 0); 161 } 162 163 /* Loop until the read is completed with timeout 164 * called with phy_mutex held */ 165 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev, 166 int in_pm) 167 { 168 unsigned long start_time = jiffies; 169 u32 val; 170 int ret; 171 172 do { 173 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm); 174 if (ret < 0) { 175 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 176 return ret; 177 } 178 179 if (!(val & MII_BUSY_)) 180 return 0; 181 } while (!time_after(jiffies, start_time + HZ)); 182 183 return -EIO; 184 } 185 186 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx, 187 int in_pm) 188 { 189 struct usbnet *dev = netdev_priv(netdev); 190 u32 val, addr; 191 int ret; 192 193 mutex_lock(&dev->phy_mutex); 194 195 /* confirm MII not busy */ 196 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 197 if (ret < 0) { 198 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n"); 199 goto done; 200 } 201 202 /* set the address, index & direction (read from PHY) */ 203 phy_id &= dev->mii.phy_id_mask; 204 idx &= dev->mii.reg_num_mask; 205 addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_; 206 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 207 if (ret < 0) { 208 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 209 goto done; 210 } 211 212 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 213 if (ret < 0) { 214 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 215 goto done; 216 } 217 218 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm); 219 if (ret < 0) { 220 netdev_warn(dev->net, "Error reading MII_DATA\n"); 221 goto done; 222 } 223 224 ret = (u16)(val & 0xFFFF); 225 226 done: 227 mutex_unlock(&dev->phy_mutex); 228 return ret; 229 } 230 231 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id, 232 int idx, int regval, int in_pm) 233 { 234 struct usbnet *dev = netdev_priv(netdev); 235 u32 val, addr; 236 int ret; 237 238 mutex_lock(&dev->phy_mutex); 239 240 /* confirm MII not busy */ 241 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 242 if (ret < 0) { 243 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n"); 244 goto done; 245 } 246 247 val = regval; 248 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm); 249 if (ret < 0) { 250 netdev_warn(dev->net, "Error writing MII_DATA\n"); 251 goto done; 252 } 253 254 /* set the address, index & direction (write to PHY) */ 255 phy_id &= dev->mii.phy_id_mask; 256 idx &= dev->mii.reg_num_mask; 257 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_; 258 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 259 if (ret < 0) { 260 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 261 goto done; 262 } 263 264 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 265 if (ret < 0) { 266 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 267 goto done; 268 } 269 270 done: 271 mutex_unlock(&dev->phy_mutex); 272 } 273 274 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id, 275 int idx) 276 { 277 return __smsc95xx_mdio_read(netdev, phy_id, idx, 1); 278 } 279 280 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id, 281 int idx, int regval) 282 { 283 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1); 284 } 285 286 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx) 287 { 288 return __smsc95xx_mdio_read(netdev, phy_id, idx, 0); 289 } 290 291 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx, 292 int regval) 293 { 294 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0); 295 } 296 297 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 298 { 299 unsigned long start_time = jiffies; 300 u32 val; 301 int ret; 302 303 do { 304 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 305 if (ret < 0) { 306 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 307 return ret; 308 } 309 310 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 311 break; 312 udelay(40); 313 } while (!time_after(jiffies, start_time + HZ)); 314 315 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 316 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 317 return -EIO; 318 } 319 320 return 0; 321 } 322 323 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 324 { 325 unsigned long start_time = jiffies; 326 u32 val; 327 int ret; 328 329 do { 330 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 331 if (ret < 0) { 332 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 333 return ret; 334 } 335 336 if (!(val & E2P_CMD_BUSY_)) 337 return 0; 338 339 udelay(40); 340 } while (!time_after(jiffies, start_time + HZ)); 341 342 netdev_warn(dev->net, "EEPROM is busy\n"); 343 return -EIO; 344 } 345 346 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 347 u8 *data) 348 { 349 u32 val; 350 int i, ret; 351 352 BUG_ON(!dev); 353 BUG_ON(!data); 354 355 ret = smsc95xx_eeprom_confirm_not_busy(dev); 356 if (ret) 357 return ret; 358 359 for (i = 0; i < length; i++) { 360 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 361 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 362 if (ret < 0) { 363 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 364 return ret; 365 } 366 367 ret = smsc95xx_wait_eeprom(dev); 368 if (ret < 0) 369 return ret; 370 371 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 372 if (ret < 0) { 373 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 374 return ret; 375 } 376 377 data[i] = val & 0xFF; 378 offset++; 379 } 380 381 return 0; 382 } 383 384 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 385 u8 *data) 386 { 387 u32 val; 388 int i, ret; 389 390 BUG_ON(!dev); 391 BUG_ON(!data); 392 393 ret = smsc95xx_eeprom_confirm_not_busy(dev); 394 if (ret) 395 return ret; 396 397 /* Issue write/erase enable command */ 398 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 399 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 400 if (ret < 0) { 401 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 402 return ret; 403 } 404 405 ret = smsc95xx_wait_eeprom(dev); 406 if (ret < 0) 407 return ret; 408 409 for (i = 0; i < length; i++) { 410 411 /* Fill data register */ 412 val = data[i]; 413 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 414 if (ret < 0) { 415 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 416 return ret; 417 } 418 419 /* Send "write" command */ 420 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 421 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 422 if (ret < 0) { 423 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 424 return ret; 425 } 426 427 ret = smsc95xx_wait_eeprom(dev); 428 if (ret < 0) 429 return ret; 430 431 offset++; 432 } 433 434 return 0; 435 } 436 437 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 438 u32 data) 439 { 440 const u16 size = 4; 441 u32 buf; 442 int ret; 443 444 buf = data; 445 cpu_to_le32s(&buf); 446 447 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 448 USB_DIR_OUT | USB_TYPE_VENDOR | 449 USB_RECIP_DEVICE, 450 0, index, &buf, size); 451 if (ret < 0) 452 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 453 ret); 454 return ret; 455 } 456 457 /* returns hash bit number for given MAC address 458 * example: 459 * 01 00 5E 00 00 01 -> returns bit number 31 */ 460 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 461 { 462 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 463 } 464 465 static void smsc95xx_set_multicast(struct net_device *netdev) 466 { 467 struct usbnet *dev = netdev_priv(netdev); 468 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 469 unsigned long flags; 470 int ret; 471 472 pdata->hash_hi = 0; 473 pdata->hash_lo = 0; 474 475 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 476 477 if (dev->net->flags & IFF_PROMISC) { 478 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 479 pdata->mac_cr |= MAC_CR_PRMS_; 480 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 481 } else if (dev->net->flags & IFF_ALLMULTI) { 482 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 483 pdata->mac_cr |= MAC_CR_MCPAS_; 484 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 485 } else if (!netdev_mc_empty(dev->net)) { 486 struct netdev_hw_addr *ha; 487 488 pdata->mac_cr |= MAC_CR_HPFILT_; 489 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 490 491 netdev_for_each_mc_addr(ha, netdev) { 492 u32 bitnum = smsc95xx_hash(ha->addr); 493 u32 mask = 0x01 << (bitnum & 0x1F); 494 if (bitnum & 0x20) 495 pdata->hash_hi |= mask; 496 else 497 pdata->hash_lo |= mask; 498 } 499 500 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 501 pdata->hash_hi, pdata->hash_lo); 502 } else { 503 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 504 pdata->mac_cr &= 505 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 506 } 507 508 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 509 510 /* Initiate async writes, as we can't wait for completion here */ 511 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 512 if (ret < 0) 513 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 514 515 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 516 if (ret < 0) 517 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 518 519 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 520 if (ret < 0) 521 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 522 } 523 524 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex, 525 u16 lcladv, u16 rmtadv) 526 { 527 u32 flow, afc_cfg = 0; 528 529 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 530 if (ret < 0) 531 return ret; 532 533 if (duplex == DUPLEX_FULL) { 534 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 535 536 if (cap & FLOW_CTRL_RX) 537 flow = 0xFFFF0002; 538 else 539 flow = 0; 540 541 if (cap & FLOW_CTRL_TX) 542 afc_cfg |= 0xF; 543 else 544 afc_cfg &= ~0xF; 545 546 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 547 cap & FLOW_CTRL_RX ? "enabled" : "disabled", 548 cap & FLOW_CTRL_TX ? "enabled" : "disabled"); 549 } else { 550 netif_dbg(dev, link, dev->net, "half duplex\n"); 551 flow = 0; 552 afc_cfg |= 0xF; 553 } 554 555 ret = smsc95xx_write_reg(dev, FLOW, flow); 556 if (ret < 0) 557 return ret; 558 559 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 560 } 561 562 static int smsc95xx_link_reset(struct usbnet *dev) 563 { 564 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 565 struct mii_if_info *mii = &dev->mii; 566 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; 567 unsigned long flags; 568 u16 lcladv, rmtadv; 569 int ret; 570 571 /* clear interrupt status */ 572 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC); 573 if (ret < 0) 574 return ret; 575 576 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 577 if (ret < 0) 578 return ret; 579 580 mii_check_media(mii, 1, 1); 581 mii_ethtool_gset(&dev->mii, &ecmd); 582 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE); 583 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA); 584 585 netif_dbg(dev, link, dev->net, 586 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n", 587 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv); 588 589 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 590 if (ecmd.duplex != DUPLEX_FULL) { 591 pdata->mac_cr &= ~MAC_CR_FDPX_; 592 pdata->mac_cr |= MAC_CR_RCVOWN_; 593 } else { 594 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 595 pdata->mac_cr |= MAC_CR_FDPX_; 596 } 597 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 598 599 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 600 if (ret < 0) 601 return ret; 602 603 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv); 604 if (ret < 0) 605 netdev_warn(dev->net, "Error updating PHY flow control\n"); 606 607 return ret; 608 } 609 610 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 611 { 612 u32 intdata; 613 614 if (urb->actual_length != 4) { 615 netdev_warn(dev->net, "unexpected urb length %d\n", 616 urb->actual_length); 617 return; 618 } 619 620 memcpy(&intdata, urb->transfer_buffer, 4); 621 le32_to_cpus(&intdata); 622 623 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 624 625 if (intdata & INT_ENP_PHY_INT_) 626 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 627 else 628 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 629 intdata); 630 } 631 632 static void set_carrier(struct usbnet *dev, bool link) 633 { 634 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 635 636 if (pdata->link_ok == link) 637 return; 638 639 pdata->link_ok = link; 640 641 if (link) 642 usbnet_link_change(dev, 1, 0); 643 else 644 usbnet_link_change(dev, 0, 0); 645 } 646 647 static void check_carrier(struct work_struct *work) 648 { 649 struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv, 650 carrier_check.work); 651 struct usbnet *dev = pdata->dev; 652 int ret; 653 654 if (pdata->suspend_flags != 0) 655 return; 656 657 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR); 658 if (ret < 0) { 659 netdev_warn(dev->net, "Failed to read MII_BMSR\n"); 660 return; 661 } 662 if (ret & BMSR_LSTATUS) 663 set_carrier(dev, 1); 664 else 665 set_carrier(dev, 0); 666 667 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 668 } 669 670 /* Enable or disable Tx & Rx checksum offload engines */ 671 static int smsc95xx_set_features(struct net_device *netdev, 672 netdev_features_t features) 673 { 674 struct usbnet *dev = netdev_priv(netdev); 675 u32 read_buf; 676 int ret; 677 678 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 679 if (ret < 0) 680 return ret; 681 682 if (features & NETIF_F_HW_CSUM) 683 read_buf |= Tx_COE_EN_; 684 else 685 read_buf &= ~Tx_COE_EN_; 686 687 if (features & NETIF_F_RXCSUM) 688 read_buf |= Rx_COE_EN_; 689 else 690 read_buf &= ~Rx_COE_EN_; 691 692 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 693 if (ret < 0) 694 return ret; 695 696 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 697 return 0; 698 } 699 700 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 701 { 702 return MAX_EEPROM_SIZE; 703 } 704 705 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 706 struct ethtool_eeprom *ee, u8 *data) 707 { 708 struct usbnet *dev = netdev_priv(netdev); 709 710 ee->magic = LAN95XX_EEPROM_MAGIC; 711 712 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 713 } 714 715 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 716 struct ethtool_eeprom *ee, u8 *data) 717 { 718 struct usbnet *dev = netdev_priv(netdev); 719 720 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 721 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 722 ee->magic); 723 return -EINVAL; 724 } 725 726 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 727 } 728 729 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 730 { 731 /* all smsc95xx registers */ 732 return COE_CR - ID_REV + sizeof(u32); 733 } 734 735 static void 736 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 737 void *buf) 738 { 739 struct usbnet *dev = netdev_priv(netdev); 740 unsigned int i, j; 741 int retval; 742 u32 *data = buf; 743 744 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 745 if (retval < 0) { 746 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 747 return; 748 } 749 750 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 751 retval = smsc95xx_read_reg(dev, i, &data[j]); 752 if (retval < 0) { 753 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 754 return; 755 } 756 } 757 } 758 759 static void smsc95xx_ethtool_get_wol(struct net_device *net, 760 struct ethtool_wolinfo *wolinfo) 761 { 762 struct usbnet *dev = netdev_priv(net); 763 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 764 765 wolinfo->supported = SUPPORTED_WAKE; 766 wolinfo->wolopts = pdata->wolopts; 767 } 768 769 static int smsc95xx_ethtool_set_wol(struct net_device *net, 770 struct ethtool_wolinfo *wolinfo) 771 { 772 struct usbnet *dev = netdev_priv(net); 773 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 774 int ret; 775 776 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 777 778 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 779 if (ret < 0) 780 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 781 782 return ret; 783 } 784 785 static const struct ethtool_ops smsc95xx_ethtool_ops = { 786 .get_link = usbnet_get_link, 787 .nway_reset = usbnet_nway_reset, 788 .get_drvinfo = usbnet_get_drvinfo, 789 .get_msglevel = usbnet_get_msglevel, 790 .set_msglevel = usbnet_set_msglevel, 791 .get_settings = usbnet_get_settings, 792 .set_settings = usbnet_set_settings, 793 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 794 .get_eeprom = smsc95xx_ethtool_get_eeprom, 795 .set_eeprom = smsc95xx_ethtool_set_eeprom, 796 .get_regs_len = smsc95xx_ethtool_getregslen, 797 .get_regs = smsc95xx_ethtool_getregs, 798 .get_wol = smsc95xx_ethtool_get_wol, 799 .set_wol = smsc95xx_ethtool_set_wol, 800 }; 801 802 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 803 { 804 struct usbnet *dev = netdev_priv(netdev); 805 806 if (!netif_running(netdev)) 807 return -EINVAL; 808 809 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 810 } 811 812 static void smsc95xx_init_mac_address(struct usbnet *dev) 813 { 814 const u8 *mac_addr; 815 816 /* maybe the boot loader passed the MAC address in devicetree */ 817 mac_addr = of_get_mac_address(dev->udev->dev.of_node); 818 if (mac_addr) { 819 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN); 820 return; 821 } 822 823 /* try reading mac address from EEPROM */ 824 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 825 dev->net->dev_addr) == 0) { 826 if (is_valid_ether_addr(dev->net->dev_addr)) { 827 /* eeprom values are valid so use them */ 828 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 829 return; 830 } 831 } 832 833 /* no useful static MAC address found. generate a random one */ 834 eth_hw_addr_random(dev->net); 835 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 836 } 837 838 static int smsc95xx_set_mac_address(struct usbnet *dev) 839 { 840 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 841 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 842 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 843 int ret; 844 845 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 846 if (ret < 0) 847 return ret; 848 849 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 850 } 851 852 /* starts the TX path */ 853 static int smsc95xx_start_tx_path(struct usbnet *dev) 854 { 855 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 856 unsigned long flags; 857 int ret; 858 859 /* Enable Tx at MAC */ 860 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 861 pdata->mac_cr |= MAC_CR_TXEN_; 862 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 863 864 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 865 if (ret < 0) 866 return ret; 867 868 /* Enable Tx at SCSRs */ 869 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 870 } 871 872 /* Starts the Receive path */ 873 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 874 { 875 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 876 unsigned long flags; 877 878 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 879 pdata->mac_cr |= MAC_CR_RXEN_; 880 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 881 882 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 883 } 884 885 static int smsc95xx_phy_initialize(struct usbnet *dev) 886 { 887 int bmcr, ret, timeout = 0; 888 889 /* Initialize MII structure */ 890 dev->mii.dev = dev->net; 891 dev->mii.mdio_read = smsc95xx_mdio_read; 892 dev->mii.mdio_write = smsc95xx_mdio_write; 893 dev->mii.phy_id_mask = 0x1f; 894 dev->mii.reg_num_mask = 0x1f; 895 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID; 896 897 /* reset phy and wait for reset to complete */ 898 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 899 900 do { 901 msleep(10); 902 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR); 903 timeout++; 904 } while ((bmcr & BMCR_RESET) && (timeout < 100)); 905 906 if (timeout >= 100) { 907 netdev_warn(dev->net, "timeout on PHY Reset"); 908 return -EIO; 909 } 910 911 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 912 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | 913 ADVERTISE_PAUSE_ASYM); 914 915 /* read to clear */ 916 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); 917 if (ret < 0) { 918 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n"); 919 return ret; 920 } 921 922 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, 923 PHY_INT_MASK_DEFAULT_); 924 mii_nway_restart(&dev->mii); 925 926 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n"); 927 return 0; 928 } 929 930 static int smsc95xx_reset(struct usbnet *dev) 931 { 932 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 933 u32 read_buf, write_buf, burst_cap; 934 int ret = 0, timeout; 935 936 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 937 938 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 939 if (ret < 0) 940 return ret; 941 942 timeout = 0; 943 do { 944 msleep(10); 945 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 946 if (ret < 0) 947 return ret; 948 timeout++; 949 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 950 951 if (timeout >= 100) { 952 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 953 return ret; 954 } 955 956 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 957 if (ret < 0) 958 return ret; 959 960 timeout = 0; 961 do { 962 msleep(10); 963 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 964 if (ret < 0) 965 return ret; 966 timeout++; 967 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 968 969 if (timeout >= 100) { 970 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 971 return ret; 972 } 973 974 ret = smsc95xx_set_mac_address(dev); 975 if (ret < 0) 976 return ret; 977 978 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 979 dev->net->dev_addr); 980 981 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 982 if (ret < 0) 983 return ret; 984 985 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 986 read_buf); 987 988 read_buf |= HW_CFG_BIR_; 989 990 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 991 if (ret < 0) 992 return ret; 993 994 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 995 if (ret < 0) 996 return ret; 997 998 netif_dbg(dev, ifup, dev->net, 999 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 1000 read_buf); 1001 1002 if (!turbo_mode) { 1003 burst_cap = 0; 1004 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 1005 } else if (dev->udev->speed == USB_SPEED_HIGH) { 1006 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 1007 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 1008 } else { 1009 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 1010 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 1011 } 1012 1013 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 1014 (ulong)dev->rx_urb_size); 1015 1016 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 1017 if (ret < 0) 1018 return ret; 1019 1020 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 1021 if (ret < 0) 1022 return ret; 1023 1024 netif_dbg(dev, ifup, dev->net, 1025 "Read Value from BURST_CAP after writing: 0x%08x\n", 1026 read_buf); 1027 1028 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1029 if (ret < 0) 1030 return ret; 1031 1032 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 1033 if (ret < 0) 1034 return ret; 1035 1036 netif_dbg(dev, ifup, dev->net, 1037 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 1038 read_buf); 1039 1040 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1041 if (ret < 0) 1042 return ret; 1043 1044 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 1045 read_buf); 1046 1047 if (turbo_mode) 1048 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 1049 1050 read_buf &= ~HW_CFG_RXDOFF_; 1051 1052 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 1053 read_buf |= NET_IP_ALIGN << 9; 1054 1055 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1056 if (ret < 0) 1057 return ret; 1058 1059 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1060 if (ret < 0) 1061 return ret; 1062 1063 netif_dbg(dev, ifup, dev->net, 1064 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 1065 1066 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 1067 if (ret < 0) 1068 return ret; 1069 1070 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1071 if (ret < 0) 1072 return ret; 1073 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1074 1075 /* Configure GPIO pins as LED outputs */ 1076 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1077 LED_GPIO_CFG_FDX_LED; 1078 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 1079 if (ret < 0) 1080 return ret; 1081 1082 /* Init Tx */ 1083 ret = smsc95xx_write_reg(dev, FLOW, 0); 1084 if (ret < 0) 1085 return ret; 1086 1087 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1088 if (ret < 0) 1089 return ret; 1090 1091 /* Don't need mac_cr_lock during initialisation */ 1092 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1093 if (ret < 0) 1094 return ret; 1095 1096 /* Init Rx */ 1097 /* Set Vlan */ 1098 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1099 if (ret < 0) 1100 return ret; 1101 1102 /* Enable or disable checksum offload engines */ 1103 ret = smsc95xx_set_features(dev->net, dev->net->features); 1104 if (ret < 0) { 1105 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1106 return ret; 1107 } 1108 1109 smsc95xx_set_multicast(dev->net); 1110 1111 ret = smsc95xx_phy_initialize(dev); 1112 if (ret < 0) { 1113 netdev_warn(dev->net, "Failed to init PHY\n"); 1114 return ret; 1115 } 1116 1117 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1118 if (ret < 0) 1119 return ret; 1120 1121 /* enable PHY interrupts */ 1122 read_buf |= INT_EP_CTL_PHY_INT_; 1123 1124 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1125 if (ret < 0) 1126 return ret; 1127 1128 ret = smsc95xx_start_tx_path(dev); 1129 if (ret < 0) { 1130 netdev_warn(dev->net, "Failed to start TX path\n"); 1131 return ret; 1132 } 1133 1134 ret = smsc95xx_start_rx_path(dev, 0); 1135 if (ret < 0) { 1136 netdev_warn(dev->net, "Failed to start RX path\n"); 1137 return ret; 1138 } 1139 1140 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1141 return 0; 1142 } 1143 1144 static const struct net_device_ops smsc95xx_netdev_ops = { 1145 .ndo_open = usbnet_open, 1146 .ndo_stop = usbnet_stop, 1147 .ndo_start_xmit = usbnet_start_xmit, 1148 .ndo_tx_timeout = usbnet_tx_timeout, 1149 .ndo_change_mtu = usbnet_change_mtu, 1150 .ndo_set_mac_address = eth_mac_addr, 1151 .ndo_validate_addr = eth_validate_addr, 1152 .ndo_do_ioctl = smsc95xx_ioctl, 1153 .ndo_set_rx_mode = smsc95xx_set_multicast, 1154 .ndo_set_features = smsc95xx_set_features, 1155 }; 1156 1157 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1158 { 1159 struct smsc95xx_priv *pdata = NULL; 1160 u32 val; 1161 int ret; 1162 1163 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1164 1165 ret = usbnet_get_endpoints(dev, intf); 1166 if (ret < 0) { 1167 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1168 return ret; 1169 } 1170 1171 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv), 1172 GFP_KERNEL); 1173 1174 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1175 if (!pdata) 1176 return -ENOMEM; 1177 1178 spin_lock_init(&pdata->mac_cr_lock); 1179 1180 if (DEFAULT_TX_CSUM_ENABLE) 1181 dev->net->features |= NETIF_F_HW_CSUM; 1182 if (DEFAULT_RX_CSUM_ENABLE) 1183 dev->net->features |= NETIF_F_RXCSUM; 1184 1185 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM; 1186 1187 smsc95xx_init_mac_address(dev); 1188 1189 /* Init all registers */ 1190 ret = smsc95xx_reset(dev); 1191 1192 /* detect device revision as different features may be available */ 1193 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1194 if (ret < 0) 1195 return ret; 1196 val >>= 16; 1197 1198 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1199 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1200 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1201 FEATURE_PHY_NLP_CROSSOVER | 1202 FEATURE_REMOTE_WAKEUP); 1203 else if (val == ID_REV_CHIP_ID_9512_) 1204 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1205 1206 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1207 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1208 dev->net->flags |= IFF_MULTICAST; 1209 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1210 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1211 1212 pdata->dev = dev; 1213 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier); 1214 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1215 1216 return 0; 1217 } 1218 1219 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1220 { 1221 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1222 1223 if (pdata) { 1224 cancel_delayed_work(&pdata->carrier_check); 1225 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1226 kfree(pdata); 1227 pdata = NULL; 1228 dev->data[0] = 0; 1229 } 1230 } 1231 1232 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1233 { 1234 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1235 return crc << ((filter % 2) * 16); 1236 } 1237 1238 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1239 { 1240 struct mii_if_info *mii = &dev->mii; 1241 int ret; 1242 1243 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1244 1245 /* read to clear */ 1246 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC); 1247 if (ret < 0) 1248 return ret; 1249 1250 /* enable interrupt source */ 1251 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK); 1252 if (ret < 0) 1253 return ret; 1254 1255 ret |= mask; 1256 1257 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret); 1258 1259 return 0; 1260 } 1261 1262 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1263 { 1264 struct mii_if_info *mii = &dev->mii; 1265 int ret; 1266 1267 /* first, a dummy read, needed to latch some MII phys */ 1268 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1269 if (ret < 0) 1270 return ret; 1271 1272 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1273 if (ret < 0) 1274 return ret; 1275 1276 return !!(ret & BMSR_LSTATUS); 1277 } 1278 1279 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1280 { 1281 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1282 u32 val; 1283 int ret; 1284 1285 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1286 if (ret < 0) 1287 return ret; 1288 1289 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1290 val |= PM_CTL_SUS_MODE_0; 1291 1292 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1293 if (ret < 0) 1294 return ret; 1295 1296 /* clear wol status */ 1297 val &= ~PM_CTL_WUPS_; 1298 val |= PM_CTL_WUPS_WOL_; 1299 1300 /* enable energy detection */ 1301 if (pdata->wolopts & WAKE_PHY) 1302 val |= PM_CTL_WUPS_ED_; 1303 1304 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1305 if (ret < 0) 1306 return ret; 1307 1308 /* read back PM_CTRL */ 1309 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1310 if (ret < 0) 1311 return ret; 1312 1313 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1314 1315 return 0; 1316 } 1317 1318 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1319 { 1320 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1321 struct mii_if_info *mii = &dev->mii; 1322 u32 val; 1323 int ret; 1324 1325 /* reconfigure link pulse detection timing for 1326 * compatibility with non-standard link partners 1327 */ 1328 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1329 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG, 1330 PHY_EDPD_CONFIG_DEFAULT); 1331 1332 /* enable energy detect power-down mode */ 1333 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS); 1334 if (ret < 0) 1335 return ret; 1336 1337 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1338 1339 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret); 1340 1341 /* enter SUSPEND1 mode */ 1342 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1343 if (ret < 0) 1344 return ret; 1345 1346 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1347 val |= PM_CTL_SUS_MODE_1; 1348 1349 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1350 if (ret < 0) 1351 return ret; 1352 1353 /* clear wol status, enable energy detection */ 1354 val &= ~PM_CTL_WUPS_; 1355 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1356 1357 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1358 if (ret < 0) 1359 return ret; 1360 1361 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1362 1363 return 0; 1364 } 1365 1366 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1367 { 1368 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1369 u32 val; 1370 int ret; 1371 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_2; 1378 1379 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1380 if (ret < 0) 1381 return ret; 1382 1383 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1384 1385 return 0; 1386 } 1387 1388 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1389 { 1390 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1391 u32 val; 1392 int ret; 1393 1394 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1395 if (ret < 0) 1396 return ret; 1397 1398 if (val & 0xFFFF) { 1399 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1400 return -EBUSY; 1401 } 1402 1403 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1404 if (ret < 0) 1405 return ret; 1406 1407 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1408 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1409 1410 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1411 if (ret < 0) 1412 return ret; 1413 1414 /* clear wol status */ 1415 val &= ~PM_CTL_WUPS_; 1416 val |= PM_CTL_WUPS_WOL_; 1417 1418 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1419 if (ret < 0) 1420 return ret; 1421 1422 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1423 1424 return 0; 1425 } 1426 1427 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1428 { 1429 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1430 int ret; 1431 1432 if (!netif_running(dev->net)) { 1433 /* interface is ifconfig down so fully power down hw */ 1434 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1435 return smsc95xx_enter_suspend2(dev); 1436 } 1437 1438 if (!link_up) { 1439 /* link is down so enter EDPD mode, but only if device can 1440 * reliably resume from it. This check should be redundant 1441 * as current FEATURE_REMOTE_WAKEUP parts also support 1442 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1443 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1444 netdev_warn(dev->net, "EDPD not supported\n"); 1445 return -EBUSY; 1446 } 1447 1448 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1449 1450 /* enable PHY wakeup events for if cable is attached */ 1451 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1452 PHY_INT_MASK_ANEG_COMP_); 1453 if (ret < 0) { 1454 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1455 return ret; 1456 } 1457 1458 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1459 return smsc95xx_enter_suspend1(dev); 1460 } 1461 1462 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1463 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1464 PHY_INT_MASK_LINK_DOWN_); 1465 if (ret < 0) { 1466 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1467 return ret; 1468 } 1469 1470 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1471 return smsc95xx_enter_suspend3(dev); 1472 } 1473 1474 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1475 { 1476 struct usbnet *dev = usb_get_intfdata(intf); 1477 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1478 u32 val, link_up; 1479 int ret; 1480 1481 ret = usbnet_suspend(intf, message); 1482 if (ret < 0) { 1483 netdev_warn(dev->net, "usbnet_suspend error\n"); 1484 return ret; 1485 } 1486 1487 if (pdata->suspend_flags) { 1488 netdev_warn(dev->net, "error during last resume\n"); 1489 pdata->suspend_flags = 0; 1490 } 1491 1492 /* determine if link is up using only _nopm functions */ 1493 link_up = smsc95xx_link_ok_nopm(dev); 1494 1495 if (message.event == PM_EVENT_AUTO_SUSPEND && 1496 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1497 ret = smsc95xx_autosuspend(dev, link_up); 1498 goto done; 1499 } 1500 1501 /* if we get this far we're not autosuspending */ 1502 /* if no wol options set, or if link is down and we're not waking on 1503 * PHY activity, enter lowest power SUSPEND2 mode 1504 */ 1505 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1506 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1507 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1508 1509 /* disable energy detect (link up) & wake up events */ 1510 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1511 if (ret < 0) 1512 goto done; 1513 1514 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1515 1516 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1517 if (ret < 0) 1518 goto done; 1519 1520 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1521 if (ret < 0) 1522 goto done; 1523 1524 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1525 1526 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1527 if (ret < 0) 1528 goto done; 1529 1530 ret = smsc95xx_enter_suspend2(dev); 1531 goto done; 1532 } 1533 1534 if (pdata->wolopts & WAKE_PHY) { 1535 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1536 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1537 if (ret < 0) { 1538 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1539 goto done; 1540 } 1541 1542 /* if link is down then configure EDPD and enter SUSPEND1, 1543 * otherwise enter SUSPEND0 below 1544 */ 1545 if (!link_up) { 1546 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1547 ret = smsc95xx_enter_suspend1(dev); 1548 goto done; 1549 } 1550 } 1551 1552 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1553 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL); 1554 u32 command[2]; 1555 u32 offset[2]; 1556 u32 crc[4]; 1557 int wuff_filter_count = 1558 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1559 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1560 int i, filter = 0; 1561 1562 if (!filter_mask) { 1563 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1564 ret = -ENOMEM; 1565 goto done; 1566 } 1567 1568 memset(command, 0, sizeof(command)); 1569 memset(offset, 0, sizeof(offset)); 1570 memset(crc, 0, sizeof(crc)); 1571 1572 if (pdata->wolopts & WAKE_BCAST) { 1573 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1574 netdev_info(dev->net, "enabling broadcast detection\n"); 1575 filter_mask[filter * 4] = 0x003F; 1576 filter_mask[filter * 4 + 1] = 0x00; 1577 filter_mask[filter * 4 + 2] = 0x00; 1578 filter_mask[filter * 4 + 3] = 0x00; 1579 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1580 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1581 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1582 filter++; 1583 } 1584 1585 if (pdata->wolopts & WAKE_MCAST) { 1586 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1587 netdev_info(dev->net, "enabling multicast detection\n"); 1588 filter_mask[filter * 4] = 0x0007; 1589 filter_mask[filter * 4 + 1] = 0x00; 1590 filter_mask[filter * 4 + 2] = 0x00; 1591 filter_mask[filter * 4 + 3] = 0x00; 1592 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1593 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1594 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1595 filter++; 1596 } 1597 1598 if (pdata->wolopts & WAKE_ARP) { 1599 const u8 arp[] = {0x08, 0x06}; 1600 netdev_info(dev->net, "enabling ARP detection\n"); 1601 filter_mask[filter * 4] = 0x0003; 1602 filter_mask[filter * 4 + 1] = 0x00; 1603 filter_mask[filter * 4 + 2] = 0x00; 1604 filter_mask[filter * 4 + 3] = 0x00; 1605 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1606 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1607 crc[filter/2] |= smsc_crc(arp, 2, filter); 1608 filter++; 1609 } 1610 1611 if (pdata->wolopts & WAKE_UCAST) { 1612 netdev_info(dev->net, "enabling unicast detection\n"); 1613 filter_mask[filter * 4] = 0x003F; 1614 filter_mask[filter * 4 + 1] = 0x00; 1615 filter_mask[filter * 4 + 2] = 0x00; 1616 filter_mask[filter * 4 + 3] = 0x00; 1617 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1618 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1619 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1620 filter++; 1621 } 1622 1623 for (i = 0; i < (wuff_filter_count * 4); i++) { 1624 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1625 if (ret < 0) { 1626 kfree(filter_mask); 1627 goto done; 1628 } 1629 } 1630 kfree(filter_mask); 1631 1632 for (i = 0; i < (wuff_filter_count / 4); i++) { 1633 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1634 if (ret < 0) 1635 goto done; 1636 } 1637 1638 for (i = 0; i < (wuff_filter_count / 4); i++) { 1639 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1640 if (ret < 0) 1641 goto done; 1642 } 1643 1644 for (i = 0; i < (wuff_filter_count / 2); i++) { 1645 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1646 if (ret < 0) 1647 goto done; 1648 } 1649 1650 /* clear any pending pattern match packet status */ 1651 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1652 if (ret < 0) 1653 goto done; 1654 1655 val |= WUCSR_WUFR_; 1656 1657 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1658 if (ret < 0) 1659 goto done; 1660 } 1661 1662 if (pdata->wolopts & WAKE_MAGIC) { 1663 /* clear any pending magic packet status */ 1664 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1665 if (ret < 0) 1666 goto done; 1667 1668 val |= WUCSR_MPR_; 1669 1670 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1671 if (ret < 0) 1672 goto done; 1673 } 1674 1675 /* enable/disable wakeup sources */ 1676 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1677 if (ret < 0) 1678 goto done; 1679 1680 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1681 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1682 val |= WUCSR_WAKE_EN_; 1683 } else { 1684 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1685 val &= ~WUCSR_WAKE_EN_; 1686 } 1687 1688 if (pdata->wolopts & WAKE_MAGIC) { 1689 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1690 val |= WUCSR_MPEN_; 1691 } else { 1692 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1693 val &= ~WUCSR_MPEN_; 1694 } 1695 1696 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1697 if (ret < 0) 1698 goto done; 1699 1700 /* enable wol wakeup source */ 1701 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1702 if (ret < 0) 1703 goto done; 1704 1705 val |= PM_CTL_WOL_EN_; 1706 1707 /* phy energy detect wakeup source */ 1708 if (pdata->wolopts & WAKE_PHY) 1709 val |= PM_CTL_ED_EN_; 1710 1711 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1712 if (ret < 0) 1713 goto done; 1714 1715 /* enable receiver to enable frame reception */ 1716 smsc95xx_start_rx_path(dev, 1); 1717 1718 /* some wol options are enabled, so enter SUSPEND0 */ 1719 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1720 ret = smsc95xx_enter_suspend0(dev); 1721 1722 done: 1723 /* 1724 * TODO: resume() might need to handle the suspend failure 1725 * in system sleep 1726 */ 1727 if (ret && PMSG_IS_AUTO(message)) 1728 usbnet_resume(intf); 1729 return ret; 1730 } 1731 1732 static int smsc95xx_resume(struct usb_interface *intf) 1733 { 1734 struct usbnet *dev = usb_get_intfdata(intf); 1735 struct smsc95xx_priv *pdata; 1736 u8 suspend_flags; 1737 int ret; 1738 u32 val; 1739 1740 BUG_ON(!dev); 1741 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1742 suspend_flags = pdata->suspend_flags; 1743 1744 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1745 1746 /* do this first to ensure it's cleared even in error case */ 1747 pdata->suspend_flags = 0; 1748 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1749 1750 if (suspend_flags & SUSPEND_ALLMODES) { 1751 /* clear wake-up sources */ 1752 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1753 if (ret < 0) 1754 return ret; 1755 1756 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1757 1758 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1759 if (ret < 0) 1760 return ret; 1761 1762 /* clear wake-up status */ 1763 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1764 if (ret < 0) 1765 return ret; 1766 1767 val &= ~PM_CTL_WOL_EN_; 1768 val |= PM_CTL_WUPS_; 1769 1770 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1771 if (ret < 0) 1772 return ret; 1773 } 1774 1775 ret = usbnet_resume(intf); 1776 if (ret < 0) 1777 netdev_warn(dev->net, "usbnet_resume error\n"); 1778 1779 return ret; 1780 } 1781 1782 static int smsc95xx_reset_resume(struct usb_interface *intf) 1783 { 1784 struct usbnet *dev = usb_get_intfdata(intf); 1785 int ret; 1786 1787 ret = smsc95xx_reset(dev); 1788 if (ret < 0) 1789 return ret; 1790 1791 return smsc95xx_resume(intf); 1792 } 1793 1794 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1795 { 1796 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1797 skb->ip_summed = CHECKSUM_COMPLETE; 1798 skb_trim(skb, skb->len - 2); 1799 } 1800 1801 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1802 { 1803 /* This check is no longer done by usbnet */ 1804 if (skb->len < dev->net->hard_header_len) 1805 return 0; 1806 1807 while (skb->len > 0) { 1808 u32 header, align_count; 1809 struct sk_buff *ax_skb; 1810 unsigned char *packet; 1811 u16 size; 1812 1813 memcpy(&header, skb->data, sizeof(header)); 1814 le32_to_cpus(&header); 1815 skb_pull(skb, 4 + NET_IP_ALIGN); 1816 packet = skb->data; 1817 1818 /* get the packet length */ 1819 size = (u16)((header & RX_STS_FL_) >> 16); 1820 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1821 1822 if (unlikely(header & RX_STS_ES_)) { 1823 netif_dbg(dev, rx_err, dev->net, 1824 "Error header=0x%08x\n", header); 1825 dev->net->stats.rx_errors++; 1826 dev->net->stats.rx_dropped++; 1827 1828 if (header & RX_STS_CRC_) { 1829 dev->net->stats.rx_crc_errors++; 1830 } else { 1831 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1832 dev->net->stats.rx_frame_errors++; 1833 1834 if ((header & RX_STS_LE_) && 1835 (!(header & RX_STS_FT_))) 1836 dev->net->stats.rx_length_errors++; 1837 } 1838 } else { 1839 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1840 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1841 netif_dbg(dev, rx_err, dev->net, 1842 "size err header=0x%08x\n", header); 1843 return 0; 1844 } 1845 1846 /* last frame in this batch */ 1847 if (skb->len == size) { 1848 if (dev->net->features & NETIF_F_RXCSUM) 1849 smsc95xx_rx_csum_offload(skb); 1850 skb_trim(skb, skb->len - 4); /* remove fcs */ 1851 skb->truesize = size + sizeof(struct sk_buff); 1852 1853 return 1; 1854 } 1855 1856 ax_skb = skb_clone(skb, GFP_ATOMIC); 1857 if (unlikely(!ax_skb)) { 1858 netdev_warn(dev->net, "Error allocating skb\n"); 1859 return 0; 1860 } 1861 1862 ax_skb->len = size; 1863 ax_skb->data = packet; 1864 skb_set_tail_pointer(ax_skb, size); 1865 1866 if (dev->net->features & NETIF_F_RXCSUM) 1867 smsc95xx_rx_csum_offload(ax_skb); 1868 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1869 ax_skb->truesize = size + sizeof(struct sk_buff); 1870 1871 usbnet_skb_return(dev, ax_skb); 1872 } 1873 1874 skb_pull(skb, size); 1875 1876 /* padding bytes before the next frame starts */ 1877 if (skb->len) 1878 skb_pull(skb, align_count); 1879 } 1880 1881 return 1; 1882 } 1883 1884 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1885 { 1886 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1887 u16 high_16 = low_16 + skb->csum_offset; 1888 return (high_16 << 16) | low_16; 1889 } 1890 1891 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1892 struct sk_buff *skb, gfp_t flags) 1893 { 1894 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1895 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1896 u32 tx_cmd_a, tx_cmd_b; 1897 1898 /* We do not advertise SG, so skbs should be already linearized */ 1899 BUG_ON(skb_shinfo(skb)->nr_frags); 1900 1901 if (skb_headroom(skb) < overhead) { 1902 struct sk_buff *skb2 = skb_copy_expand(skb, 1903 overhead, 0, flags); 1904 dev_kfree_skb_any(skb); 1905 skb = skb2; 1906 if (!skb) 1907 return NULL; 1908 } 1909 1910 if (csum) { 1911 if (skb->len <= 45) { 1912 /* workaround - hardware tx checksum does not work 1913 * properly with extremely small packets */ 1914 long csstart = skb_checksum_start_offset(skb); 1915 __wsum calc = csum_partial(skb->data + csstart, 1916 skb->len - csstart, 0); 1917 *((__sum16 *)(skb->data + csstart 1918 + skb->csum_offset)) = csum_fold(calc); 1919 1920 csum = false; 1921 } else { 1922 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 1923 skb_push(skb, 4); 1924 cpu_to_le32s(&csum_preamble); 1925 memcpy(skb->data, &csum_preamble, 4); 1926 } 1927 } 1928 1929 skb_push(skb, 4); 1930 tx_cmd_b = (u32)(skb->len - 4); 1931 if (csum) 1932 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 1933 cpu_to_le32s(&tx_cmd_b); 1934 memcpy(skb->data, &tx_cmd_b, 4); 1935 1936 skb_push(skb, 4); 1937 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ | 1938 TX_CMD_A_LAST_SEG_; 1939 cpu_to_le32s(&tx_cmd_a); 1940 memcpy(skb->data, &tx_cmd_a, 4); 1941 1942 return skb; 1943 } 1944 1945 static int smsc95xx_manage_power(struct usbnet *dev, int on) 1946 { 1947 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1948 1949 dev->intf->needs_remote_wakeup = on; 1950 1951 if (pdata->features & FEATURE_REMOTE_WAKEUP) 1952 return 0; 1953 1954 /* this chip revision isn't capable of remote wakeup */ 1955 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 1956 1957 if (on) 1958 usb_autopm_get_interface_no_resume(dev->intf); 1959 else 1960 usb_autopm_put_interface(dev->intf); 1961 1962 return 0; 1963 } 1964 1965 static const struct driver_info smsc95xx_info = { 1966 .description = "smsc95xx USB 2.0 Ethernet", 1967 .bind = smsc95xx_bind, 1968 .unbind = smsc95xx_unbind, 1969 .link_reset = smsc95xx_link_reset, 1970 .reset = smsc95xx_reset, 1971 .rx_fixup = smsc95xx_rx_fixup, 1972 .tx_fixup = smsc95xx_tx_fixup, 1973 .status = smsc95xx_status, 1974 .manage_power = smsc95xx_manage_power, 1975 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 1976 }; 1977 1978 static const struct usb_device_id products[] = { 1979 { 1980 /* SMSC9500 USB Ethernet Device */ 1981 USB_DEVICE(0x0424, 0x9500), 1982 .driver_info = (unsigned long) &smsc95xx_info, 1983 }, 1984 { 1985 /* SMSC9505 USB Ethernet Device */ 1986 USB_DEVICE(0x0424, 0x9505), 1987 .driver_info = (unsigned long) &smsc95xx_info, 1988 }, 1989 { 1990 /* SMSC9500A USB Ethernet Device */ 1991 USB_DEVICE(0x0424, 0x9E00), 1992 .driver_info = (unsigned long) &smsc95xx_info, 1993 }, 1994 { 1995 /* SMSC9505A USB Ethernet Device */ 1996 USB_DEVICE(0x0424, 0x9E01), 1997 .driver_info = (unsigned long) &smsc95xx_info, 1998 }, 1999 { 2000 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2001 USB_DEVICE(0x0424, 0xec00), 2002 .driver_info = (unsigned long) &smsc95xx_info, 2003 }, 2004 { 2005 /* SMSC9500 USB Ethernet Device (SAL10) */ 2006 USB_DEVICE(0x0424, 0x9900), 2007 .driver_info = (unsigned long) &smsc95xx_info, 2008 }, 2009 { 2010 /* SMSC9505 USB Ethernet Device (SAL10) */ 2011 USB_DEVICE(0x0424, 0x9901), 2012 .driver_info = (unsigned long) &smsc95xx_info, 2013 }, 2014 { 2015 /* SMSC9500A USB Ethernet Device (SAL10) */ 2016 USB_DEVICE(0x0424, 0x9902), 2017 .driver_info = (unsigned long) &smsc95xx_info, 2018 }, 2019 { 2020 /* SMSC9505A USB Ethernet Device (SAL10) */ 2021 USB_DEVICE(0x0424, 0x9903), 2022 .driver_info = (unsigned long) &smsc95xx_info, 2023 }, 2024 { 2025 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2026 USB_DEVICE(0x0424, 0x9904), 2027 .driver_info = (unsigned long) &smsc95xx_info, 2028 }, 2029 { 2030 /* SMSC9500A USB Ethernet Device (HAL) */ 2031 USB_DEVICE(0x0424, 0x9905), 2032 .driver_info = (unsigned long) &smsc95xx_info, 2033 }, 2034 { 2035 /* SMSC9505A USB Ethernet Device (HAL) */ 2036 USB_DEVICE(0x0424, 0x9906), 2037 .driver_info = (unsigned long) &smsc95xx_info, 2038 }, 2039 { 2040 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2041 USB_DEVICE(0x0424, 0x9907), 2042 .driver_info = (unsigned long) &smsc95xx_info, 2043 }, 2044 { 2045 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2046 USB_DEVICE(0x0424, 0x9908), 2047 .driver_info = (unsigned long) &smsc95xx_info, 2048 }, 2049 { 2050 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2051 USB_DEVICE(0x0424, 0x9909), 2052 .driver_info = (unsigned long) &smsc95xx_info, 2053 }, 2054 { 2055 /* SMSC LAN9530 USB Ethernet Device */ 2056 USB_DEVICE(0x0424, 0x9530), 2057 .driver_info = (unsigned long) &smsc95xx_info, 2058 }, 2059 { 2060 /* SMSC LAN9730 USB Ethernet Device */ 2061 USB_DEVICE(0x0424, 0x9730), 2062 .driver_info = (unsigned long) &smsc95xx_info, 2063 }, 2064 { 2065 /* SMSC LAN89530 USB Ethernet Device */ 2066 USB_DEVICE(0x0424, 0x9E08), 2067 .driver_info = (unsigned long) &smsc95xx_info, 2068 }, 2069 { }, /* END */ 2070 }; 2071 MODULE_DEVICE_TABLE(usb, products); 2072 2073 static struct usb_driver smsc95xx_driver = { 2074 .name = "smsc95xx", 2075 .id_table = products, 2076 .probe = usbnet_probe, 2077 .suspend = smsc95xx_suspend, 2078 .resume = smsc95xx_resume, 2079 .reset_resume = smsc95xx_reset_resume, 2080 .disconnect = usbnet_disconnect, 2081 .disable_hub_initiated_lpm = 1, 2082 .supports_autosuspend = 1, 2083 }; 2084 2085 module_usb_driver(smsc95xx_driver); 2086 2087 MODULE_AUTHOR("Nancy Lin"); 2088 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2089 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2090 MODULE_LICENSE("GPL"); 2091