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 "1.0.6" 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 chip_id; 68 u32 mac_cr; 69 u32 hash_hi; 70 u32 hash_lo; 71 u32 wolopts; 72 spinlock_t mac_cr_lock; 73 u8 features; 74 u8 suspend_flags; 75 u8 mdix_ctrl; 76 bool link_ok; 77 struct delayed_work carrier_check; 78 struct usbnet *dev; 79 }; 80 81 static bool turbo_mode = true; 82 module_param(turbo_mode, bool, 0644); 83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 84 85 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index, 86 u32 *data, int in_pm) 87 { 88 u32 buf; 89 int ret; 90 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 91 92 BUG_ON(!dev); 93 94 if (!in_pm) 95 fn = usbnet_read_cmd; 96 else 97 fn = usbnet_read_cmd_nopm; 98 99 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 100 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 101 0, index, &buf, 4); 102 if (unlikely(ret < 0)) { 103 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 104 index, ret); 105 return ret; 106 } 107 108 le32_to_cpus(&buf); 109 *data = buf; 110 111 return ret; 112 } 113 114 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index, 115 u32 data, int in_pm) 116 { 117 u32 buf; 118 int ret; 119 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 120 121 BUG_ON(!dev); 122 123 if (!in_pm) 124 fn = usbnet_write_cmd; 125 else 126 fn = usbnet_write_cmd_nopm; 127 128 buf = data; 129 cpu_to_le32s(&buf); 130 131 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 132 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 133 0, index, &buf, 4); 134 if (unlikely(ret < 0)) 135 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 136 index, ret); 137 138 return ret; 139 } 140 141 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index, 142 u32 *data) 143 { 144 return __smsc95xx_read_reg(dev, index, data, 1); 145 } 146 147 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index, 148 u32 data) 149 { 150 return __smsc95xx_write_reg(dev, index, data, 1); 151 } 152 153 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, 154 u32 *data) 155 { 156 return __smsc95xx_read_reg(dev, index, data, 0); 157 } 158 159 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, 160 u32 data) 161 { 162 return __smsc95xx_write_reg(dev, index, data, 0); 163 } 164 165 /* Loop until the read is completed with timeout 166 * called with phy_mutex held */ 167 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev, 168 int in_pm) 169 { 170 unsigned long start_time = jiffies; 171 u32 val; 172 int ret; 173 174 do { 175 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm); 176 if (ret < 0) { 177 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 178 return ret; 179 } 180 181 if (!(val & MII_BUSY_)) 182 return 0; 183 } while (!time_after(jiffies, start_time + HZ)); 184 185 return -EIO; 186 } 187 188 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx, 189 int in_pm) 190 { 191 struct usbnet *dev = netdev_priv(netdev); 192 u32 val, addr; 193 int ret; 194 195 mutex_lock(&dev->phy_mutex); 196 197 /* confirm MII not busy */ 198 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 199 if (ret < 0) { 200 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n"); 201 goto done; 202 } 203 204 /* set the address, index & direction (read from PHY) */ 205 phy_id &= dev->mii.phy_id_mask; 206 idx &= dev->mii.reg_num_mask; 207 addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_; 208 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 209 if (ret < 0) { 210 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 211 goto done; 212 } 213 214 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 215 if (ret < 0) { 216 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 217 goto done; 218 } 219 220 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm); 221 if (ret < 0) { 222 netdev_warn(dev->net, "Error reading MII_DATA\n"); 223 goto done; 224 } 225 226 ret = (u16)(val & 0xFFFF); 227 228 done: 229 mutex_unlock(&dev->phy_mutex); 230 return ret; 231 } 232 233 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id, 234 int idx, int regval, int in_pm) 235 { 236 struct usbnet *dev = netdev_priv(netdev); 237 u32 val, addr; 238 int ret; 239 240 mutex_lock(&dev->phy_mutex); 241 242 /* confirm MII not busy */ 243 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 244 if (ret < 0) { 245 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n"); 246 goto done; 247 } 248 249 val = regval; 250 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm); 251 if (ret < 0) { 252 netdev_warn(dev->net, "Error writing MII_DATA\n"); 253 goto done; 254 } 255 256 /* set the address, index & direction (write to PHY) */ 257 phy_id &= dev->mii.phy_id_mask; 258 idx &= dev->mii.reg_num_mask; 259 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_; 260 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm); 261 if (ret < 0) { 262 netdev_warn(dev->net, "Error writing MII_ADDR\n"); 263 goto done; 264 } 265 266 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm); 267 if (ret < 0) { 268 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 269 goto done; 270 } 271 272 done: 273 mutex_unlock(&dev->phy_mutex); 274 } 275 276 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id, 277 int idx) 278 { 279 return __smsc95xx_mdio_read(netdev, phy_id, idx, 1); 280 } 281 282 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id, 283 int idx, int regval) 284 { 285 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1); 286 } 287 288 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx) 289 { 290 return __smsc95xx_mdio_read(netdev, phy_id, idx, 0); 291 } 292 293 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx, 294 int regval) 295 { 296 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0); 297 } 298 299 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) 300 { 301 unsigned long start_time = jiffies; 302 u32 val; 303 int ret; 304 305 do { 306 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 307 if (ret < 0) { 308 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 309 return ret; 310 } 311 312 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) 313 break; 314 udelay(40); 315 } while (!time_after(jiffies, start_time + HZ)); 316 317 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { 318 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 319 return -EIO; 320 } 321 322 return 0; 323 } 324 325 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) 326 { 327 unsigned long start_time = jiffies; 328 u32 val; 329 int ret; 330 331 do { 332 ret = smsc95xx_read_reg(dev, E2P_CMD, &val); 333 if (ret < 0) { 334 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 335 return ret; 336 } 337 338 if (!(val & E2P_CMD_BUSY_)) 339 return 0; 340 341 udelay(40); 342 } while (!time_after(jiffies, start_time + HZ)); 343 344 netdev_warn(dev->net, "EEPROM is busy\n"); 345 return -EIO; 346 } 347 348 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 349 u8 *data) 350 { 351 u32 val; 352 int i, ret; 353 354 BUG_ON(!dev); 355 BUG_ON(!data); 356 357 ret = smsc95xx_eeprom_confirm_not_busy(dev); 358 if (ret) 359 return ret; 360 361 for (i = 0; i < length; i++) { 362 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); 363 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 364 if (ret < 0) { 365 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 366 return ret; 367 } 368 369 ret = smsc95xx_wait_eeprom(dev); 370 if (ret < 0) 371 return ret; 372 373 ret = smsc95xx_read_reg(dev, E2P_DATA, &val); 374 if (ret < 0) { 375 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 376 return ret; 377 } 378 379 data[i] = val & 0xFF; 380 offset++; 381 } 382 383 return 0; 384 } 385 386 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 387 u8 *data) 388 { 389 u32 val; 390 int i, ret; 391 392 BUG_ON(!dev); 393 BUG_ON(!data); 394 395 ret = smsc95xx_eeprom_confirm_not_busy(dev); 396 if (ret) 397 return ret; 398 399 /* Issue write/erase enable command */ 400 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; 401 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 402 if (ret < 0) { 403 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 404 return ret; 405 } 406 407 ret = smsc95xx_wait_eeprom(dev); 408 if (ret < 0) 409 return ret; 410 411 for (i = 0; i < length; i++) { 412 413 /* Fill data register */ 414 val = data[i]; 415 ret = smsc95xx_write_reg(dev, E2P_DATA, val); 416 if (ret < 0) { 417 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 418 return ret; 419 } 420 421 /* Send "write" command */ 422 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); 423 ret = smsc95xx_write_reg(dev, E2P_CMD, val); 424 if (ret < 0) { 425 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 426 return ret; 427 } 428 429 ret = smsc95xx_wait_eeprom(dev); 430 if (ret < 0) 431 return ret; 432 433 offset++; 434 } 435 436 return 0; 437 } 438 439 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, 440 u32 data) 441 { 442 const u16 size = 4; 443 u32 buf; 444 int ret; 445 446 buf = data; 447 cpu_to_le32s(&buf); 448 449 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, 450 USB_DIR_OUT | USB_TYPE_VENDOR | 451 USB_RECIP_DEVICE, 452 0, index, &buf, size); 453 if (ret < 0) 454 netdev_warn(dev->net, "Error write async cmd, sts=%d\n", 455 ret); 456 return ret; 457 } 458 459 /* returns hash bit number for given MAC address 460 * example: 461 * 01 00 5E 00 00 01 -> returns bit number 31 */ 462 static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) 463 { 464 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; 465 } 466 467 static void smsc95xx_set_multicast(struct net_device *netdev) 468 { 469 struct usbnet *dev = netdev_priv(netdev); 470 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 471 unsigned long flags; 472 int ret; 473 474 pdata->hash_hi = 0; 475 pdata->hash_lo = 0; 476 477 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 478 479 if (dev->net->flags & IFF_PROMISC) { 480 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 481 pdata->mac_cr |= MAC_CR_PRMS_; 482 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 483 } else if (dev->net->flags & IFF_ALLMULTI) { 484 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 485 pdata->mac_cr |= MAC_CR_MCPAS_; 486 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); 487 } else if (!netdev_mc_empty(dev->net)) { 488 struct netdev_hw_addr *ha; 489 490 pdata->mac_cr |= MAC_CR_HPFILT_; 491 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); 492 493 netdev_for_each_mc_addr(ha, netdev) { 494 u32 bitnum = smsc95xx_hash(ha->addr); 495 u32 mask = 0x01 << (bitnum & 0x1F); 496 if (bitnum & 0x20) 497 pdata->hash_hi |= mask; 498 else 499 pdata->hash_lo |= mask; 500 } 501 502 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", 503 pdata->hash_hi, pdata->hash_lo); 504 } else { 505 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 506 pdata->mac_cr &= 507 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); 508 } 509 510 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 511 512 /* Initiate async writes, as we can't wait for completion here */ 513 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); 514 if (ret < 0) 515 netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); 516 517 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); 518 if (ret < 0) 519 netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); 520 521 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); 522 if (ret < 0) 523 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); 524 } 525 526 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex, 527 u16 lcladv, u16 rmtadv) 528 { 529 u32 flow = 0, afc_cfg; 530 531 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); 532 if (ret < 0) 533 return ret; 534 535 if (duplex == DUPLEX_FULL) { 536 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 537 538 if (cap & FLOW_CTRL_RX) 539 flow = 0xFFFF0002; 540 541 if (cap & FLOW_CTRL_TX) { 542 afc_cfg |= 0xF; 543 flow |= 0xFFFF0000; 544 } else { 545 afc_cfg &= ~0xF; 546 } 547 548 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 549 cap & FLOW_CTRL_RX ? "enabled" : "disabled", 550 cap & FLOW_CTRL_TX ? "enabled" : "disabled"); 551 } else { 552 netif_dbg(dev, link, dev->net, "half duplex\n"); 553 afc_cfg |= 0xF; 554 } 555 556 ret = smsc95xx_write_reg(dev, FLOW, flow); 557 if (ret < 0) 558 return ret; 559 560 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 561 } 562 563 static int smsc95xx_link_reset(struct usbnet *dev) 564 { 565 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 566 struct mii_if_info *mii = &dev->mii; 567 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; 568 unsigned long flags; 569 u16 lcladv, rmtadv; 570 int ret; 571 572 /* clear interrupt status */ 573 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC); 574 if (ret < 0) 575 return ret; 576 577 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 578 if (ret < 0) 579 return ret; 580 581 mii_check_media(mii, 1, 1); 582 mii_ethtool_gset(&dev->mii, &ecmd); 583 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE); 584 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA); 585 586 netif_dbg(dev, link, dev->net, 587 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n", 588 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv); 589 590 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 591 if (ecmd.duplex != DUPLEX_FULL) { 592 pdata->mac_cr &= ~MAC_CR_FDPX_; 593 pdata->mac_cr |= MAC_CR_RCVOWN_; 594 } else { 595 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 596 pdata->mac_cr |= MAC_CR_FDPX_; 597 } 598 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 599 600 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 601 if (ret < 0) 602 return ret; 603 604 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv); 605 if (ret < 0) 606 netdev_warn(dev->net, "Error updating PHY flow control\n"); 607 608 return ret; 609 } 610 611 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 612 { 613 u32 intdata; 614 615 if (urb->actual_length != 4) { 616 netdev_warn(dev->net, "unexpected urb length %d\n", 617 urb->actual_length); 618 return; 619 } 620 621 memcpy(&intdata, urb->transfer_buffer, 4); 622 le32_to_cpus(&intdata); 623 624 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 625 626 if (intdata & INT_ENP_PHY_INT_) 627 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 628 else 629 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 630 intdata); 631 } 632 633 static void set_carrier(struct usbnet *dev, bool link) 634 { 635 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 636 637 if (pdata->link_ok == link) 638 return; 639 640 pdata->link_ok = link; 641 642 if (link) 643 usbnet_link_change(dev, 1, 0); 644 else 645 usbnet_link_change(dev, 0, 0); 646 } 647 648 static void check_carrier(struct work_struct *work) 649 { 650 struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv, 651 carrier_check.work); 652 struct usbnet *dev = pdata->dev; 653 int ret; 654 655 if (pdata->suspend_flags != 0) 656 return; 657 658 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR); 659 if (ret < 0) { 660 netdev_warn(dev->net, "Failed to read MII_BMSR\n"); 661 return; 662 } 663 if (ret & BMSR_LSTATUS) 664 set_carrier(dev, 1); 665 else 666 set_carrier(dev, 0); 667 668 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 669 } 670 671 /* Enable or disable Tx & Rx checksum offload engines */ 672 static int smsc95xx_set_features(struct net_device *netdev, 673 netdev_features_t features) 674 { 675 struct usbnet *dev = netdev_priv(netdev); 676 u32 read_buf; 677 int ret; 678 679 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 680 if (ret < 0) 681 return ret; 682 683 if (features & NETIF_F_IP_CSUM) 684 read_buf |= Tx_COE_EN_; 685 else 686 read_buf &= ~Tx_COE_EN_; 687 688 if (features & NETIF_F_RXCSUM) 689 read_buf |= Rx_COE_EN_; 690 else 691 read_buf &= ~Rx_COE_EN_; 692 693 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 694 if (ret < 0) 695 return ret; 696 697 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 698 return 0; 699 } 700 701 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 702 { 703 return MAX_EEPROM_SIZE; 704 } 705 706 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 707 struct ethtool_eeprom *ee, u8 *data) 708 { 709 struct usbnet *dev = netdev_priv(netdev); 710 711 ee->magic = LAN95XX_EEPROM_MAGIC; 712 713 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 714 } 715 716 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 717 struct ethtool_eeprom *ee, u8 *data) 718 { 719 struct usbnet *dev = netdev_priv(netdev); 720 721 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 722 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 723 ee->magic); 724 return -EINVAL; 725 } 726 727 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 728 } 729 730 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 731 { 732 /* all smsc95xx registers */ 733 return COE_CR - ID_REV + sizeof(u32); 734 } 735 736 static void 737 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 738 void *buf) 739 { 740 struct usbnet *dev = netdev_priv(netdev); 741 unsigned int i, j; 742 int retval; 743 u32 *data = buf; 744 745 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 746 if (retval < 0) { 747 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 748 return; 749 } 750 751 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 752 retval = smsc95xx_read_reg(dev, i, &data[j]); 753 if (retval < 0) { 754 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 755 return; 756 } 757 } 758 } 759 760 static void smsc95xx_ethtool_get_wol(struct net_device *net, 761 struct ethtool_wolinfo *wolinfo) 762 { 763 struct usbnet *dev = netdev_priv(net); 764 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 765 766 wolinfo->supported = SUPPORTED_WAKE; 767 wolinfo->wolopts = pdata->wolopts; 768 } 769 770 static int smsc95xx_ethtool_set_wol(struct net_device *net, 771 struct ethtool_wolinfo *wolinfo) 772 { 773 struct usbnet *dev = netdev_priv(net); 774 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 775 int ret; 776 777 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 778 779 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 780 if (ret < 0) 781 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 782 783 return ret; 784 } 785 786 static int get_mdix_status(struct net_device *net) 787 { 788 struct usbnet *dev = netdev_priv(net); 789 u32 val; 790 int buf; 791 792 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS); 793 if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) { 794 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_) 795 return ETH_TP_MDI_AUTO; 796 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_) 797 return ETH_TP_MDI_X; 798 } else { 799 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val); 800 if (val & STRAP_STATUS_AMDIX_EN_) 801 return ETH_TP_MDI_AUTO; 802 } 803 804 return ETH_TP_MDI; 805 } 806 807 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl) 808 { 809 struct usbnet *dev = netdev_priv(net); 810 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 811 int buf; 812 813 if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) || 814 (pdata->chip_id == ID_REV_CHIP_ID_9530_) || 815 (pdata->chip_id == ID_REV_CHIP_ID_89530_) || 816 (pdata->chip_id == ID_REV_CHIP_ID_9730_)) { 817 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */ 818 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 819 PHY_EDPD_CONFIG); 820 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_; 821 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 822 PHY_EDPD_CONFIG, buf); 823 } 824 825 if (mdix_ctrl == ETH_TP_MDI) { 826 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 827 SPECIAL_CTRL_STS); 828 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_; 829 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 830 SPECIAL_CTRL_STS_AMDIX_STATE_); 831 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 832 SPECIAL_CTRL_STS, buf); 833 } else if (mdix_ctrl == ETH_TP_MDI_X) { 834 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 835 SPECIAL_CTRL_STS); 836 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_; 837 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 838 SPECIAL_CTRL_STS_AMDIX_STATE_); 839 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_; 840 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 841 SPECIAL_CTRL_STS, buf); 842 } else if (mdix_ctrl == ETH_TP_MDI_AUTO) { 843 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 844 SPECIAL_CTRL_STS); 845 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_; 846 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 847 SPECIAL_CTRL_STS_AMDIX_STATE_); 848 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_; 849 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 850 SPECIAL_CTRL_STS, buf); 851 } 852 pdata->mdix_ctrl = mdix_ctrl; 853 } 854 855 static int smsc95xx_get_link_ksettings(struct net_device *net, 856 struct ethtool_link_ksettings *cmd) 857 { 858 struct usbnet *dev = netdev_priv(net); 859 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 860 int retval; 861 862 retval = usbnet_get_link_ksettings(net, cmd); 863 864 cmd->base.eth_tp_mdix = pdata->mdix_ctrl; 865 cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl; 866 867 return retval; 868 } 869 870 static int smsc95xx_set_link_ksettings(struct net_device *net, 871 const struct ethtool_link_ksettings *cmd) 872 { 873 struct usbnet *dev = netdev_priv(net); 874 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 875 int retval; 876 877 if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl) 878 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl); 879 880 retval = usbnet_set_link_ksettings(net, cmd); 881 882 return retval; 883 } 884 885 static const struct ethtool_ops smsc95xx_ethtool_ops = { 886 .get_link = usbnet_get_link, 887 .nway_reset = usbnet_nway_reset, 888 .get_drvinfo = usbnet_get_drvinfo, 889 .get_msglevel = usbnet_get_msglevel, 890 .set_msglevel = usbnet_set_msglevel, 891 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 892 .get_eeprom = smsc95xx_ethtool_get_eeprom, 893 .set_eeprom = smsc95xx_ethtool_set_eeprom, 894 .get_regs_len = smsc95xx_ethtool_getregslen, 895 .get_regs = smsc95xx_ethtool_getregs, 896 .get_wol = smsc95xx_ethtool_get_wol, 897 .set_wol = smsc95xx_ethtool_set_wol, 898 .get_link_ksettings = smsc95xx_get_link_ksettings, 899 .set_link_ksettings = smsc95xx_set_link_ksettings, 900 .get_ts_info = ethtool_op_get_ts_info, 901 }; 902 903 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 904 { 905 struct usbnet *dev = netdev_priv(netdev); 906 907 if (!netif_running(netdev)) 908 return -EINVAL; 909 910 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 911 } 912 913 static void smsc95xx_init_mac_address(struct usbnet *dev) 914 { 915 const u8 *mac_addr; 916 917 /* maybe the boot loader passed the MAC address in devicetree */ 918 mac_addr = of_get_mac_address(dev->udev->dev.of_node); 919 if (mac_addr) { 920 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN); 921 return; 922 } 923 924 /* try reading mac address from EEPROM */ 925 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 926 dev->net->dev_addr) == 0) { 927 if (is_valid_ether_addr(dev->net->dev_addr)) { 928 /* eeprom values are valid so use them */ 929 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 930 return; 931 } 932 } 933 934 /* no useful static MAC address found. generate a random one */ 935 eth_hw_addr_random(dev->net); 936 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 937 } 938 939 static int smsc95xx_set_mac_address(struct usbnet *dev) 940 { 941 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 942 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 943 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 944 int ret; 945 946 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 947 if (ret < 0) 948 return ret; 949 950 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 951 } 952 953 /* starts the TX path */ 954 static int smsc95xx_start_tx_path(struct usbnet *dev) 955 { 956 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 957 unsigned long flags; 958 int ret; 959 960 /* Enable Tx at MAC */ 961 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 962 pdata->mac_cr |= MAC_CR_TXEN_; 963 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 964 965 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 966 if (ret < 0) 967 return ret; 968 969 /* Enable Tx at SCSRs */ 970 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 971 } 972 973 /* Starts the Receive path */ 974 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 975 { 976 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 977 unsigned long flags; 978 979 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 980 pdata->mac_cr |= MAC_CR_RXEN_; 981 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 982 983 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 984 } 985 986 static int smsc95xx_phy_initialize(struct usbnet *dev) 987 { 988 int bmcr, ret, timeout = 0; 989 990 /* Initialize MII structure */ 991 dev->mii.dev = dev->net; 992 dev->mii.mdio_read = smsc95xx_mdio_read; 993 dev->mii.mdio_write = smsc95xx_mdio_write; 994 dev->mii.phy_id_mask = 0x1f; 995 dev->mii.reg_num_mask = 0x1f; 996 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID; 997 998 /* reset phy and wait for reset to complete */ 999 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 1000 1001 do { 1002 msleep(10); 1003 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR); 1004 timeout++; 1005 } while ((bmcr & BMCR_RESET) && (timeout < 100)); 1006 1007 if (timeout >= 100) { 1008 netdev_warn(dev->net, "timeout on PHY Reset"); 1009 return -EIO; 1010 } 1011 1012 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 1013 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | 1014 ADVERTISE_PAUSE_ASYM); 1015 1016 /* read to clear */ 1017 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); 1018 if (ret < 0) { 1019 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n"); 1020 return ret; 1021 } 1022 1023 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, 1024 PHY_INT_MASK_DEFAULT_); 1025 mii_nway_restart(&dev->mii); 1026 1027 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n"); 1028 return 0; 1029 } 1030 1031 static int smsc95xx_reset(struct usbnet *dev) 1032 { 1033 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1034 u32 read_buf, write_buf, burst_cap; 1035 int ret = 0, timeout; 1036 1037 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 1038 1039 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 1040 if (ret < 0) 1041 return ret; 1042 1043 timeout = 0; 1044 do { 1045 msleep(10); 1046 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1047 if (ret < 0) 1048 return ret; 1049 timeout++; 1050 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 1051 1052 if (timeout >= 100) { 1053 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 1054 return ret; 1055 } 1056 1057 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 1058 if (ret < 0) 1059 return ret; 1060 1061 timeout = 0; 1062 do { 1063 msleep(10); 1064 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 1065 if (ret < 0) 1066 return ret; 1067 timeout++; 1068 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 1069 1070 if (timeout >= 100) { 1071 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1072 return ret; 1073 } 1074 1075 ret = smsc95xx_set_mac_address(dev); 1076 if (ret < 0) 1077 return ret; 1078 1079 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 1080 dev->net->dev_addr); 1081 1082 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1083 if (ret < 0) 1084 return ret; 1085 1086 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 1087 read_buf); 1088 1089 read_buf |= HW_CFG_BIR_; 1090 1091 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1092 if (ret < 0) 1093 return ret; 1094 1095 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1096 if (ret < 0) 1097 return ret; 1098 1099 netif_dbg(dev, ifup, dev->net, 1100 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 1101 read_buf); 1102 1103 if (!turbo_mode) { 1104 burst_cap = 0; 1105 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 1106 } else if (dev->udev->speed == USB_SPEED_HIGH) { 1107 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 1108 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 1109 } else { 1110 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 1111 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 1112 } 1113 1114 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 1115 (ulong)dev->rx_urb_size); 1116 1117 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 1118 if (ret < 0) 1119 return ret; 1120 1121 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 1122 if (ret < 0) 1123 return ret; 1124 1125 netif_dbg(dev, ifup, dev->net, 1126 "Read Value from BURST_CAP after writing: 0x%08x\n", 1127 read_buf); 1128 1129 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1130 if (ret < 0) 1131 return ret; 1132 1133 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 1134 if (ret < 0) 1135 return ret; 1136 1137 netif_dbg(dev, ifup, dev->net, 1138 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 1139 read_buf); 1140 1141 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1142 if (ret < 0) 1143 return ret; 1144 1145 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 1146 read_buf); 1147 1148 if (turbo_mode) 1149 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 1150 1151 read_buf &= ~HW_CFG_RXDOFF_; 1152 1153 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 1154 read_buf |= NET_IP_ALIGN << 9; 1155 1156 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1157 if (ret < 0) 1158 return ret; 1159 1160 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1161 if (ret < 0) 1162 return ret; 1163 1164 netif_dbg(dev, ifup, dev->net, 1165 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 1166 1167 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 1168 if (ret < 0) 1169 return ret; 1170 1171 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1172 if (ret < 0) 1173 return ret; 1174 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1175 1176 /* Configure GPIO pins as LED outputs */ 1177 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1178 LED_GPIO_CFG_FDX_LED; 1179 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 1180 if (ret < 0) 1181 return ret; 1182 1183 /* Init Tx */ 1184 ret = smsc95xx_write_reg(dev, FLOW, 0); 1185 if (ret < 0) 1186 return ret; 1187 1188 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1189 if (ret < 0) 1190 return ret; 1191 1192 /* Don't need mac_cr_lock during initialisation */ 1193 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1194 if (ret < 0) 1195 return ret; 1196 1197 /* Init Rx */ 1198 /* Set Vlan */ 1199 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1200 if (ret < 0) 1201 return ret; 1202 1203 /* Enable or disable checksum offload engines */ 1204 ret = smsc95xx_set_features(dev->net, dev->net->features); 1205 if (ret < 0) { 1206 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1207 return ret; 1208 } 1209 1210 smsc95xx_set_multicast(dev->net); 1211 1212 ret = smsc95xx_phy_initialize(dev); 1213 if (ret < 0) { 1214 netdev_warn(dev->net, "Failed to init PHY\n"); 1215 return ret; 1216 } 1217 1218 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1219 if (ret < 0) 1220 return ret; 1221 1222 /* enable PHY interrupts */ 1223 read_buf |= INT_EP_CTL_PHY_INT_; 1224 1225 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1226 if (ret < 0) 1227 return ret; 1228 1229 ret = smsc95xx_start_tx_path(dev); 1230 if (ret < 0) { 1231 netdev_warn(dev->net, "Failed to start TX path\n"); 1232 return ret; 1233 } 1234 1235 ret = smsc95xx_start_rx_path(dev, 0); 1236 if (ret < 0) { 1237 netdev_warn(dev->net, "Failed to start RX path\n"); 1238 return ret; 1239 } 1240 1241 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1242 return 0; 1243 } 1244 1245 static const struct net_device_ops smsc95xx_netdev_ops = { 1246 .ndo_open = usbnet_open, 1247 .ndo_stop = usbnet_stop, 1248 .ndo_start_xmit = usbnet_start_xmit, 1249 .ndo_tx_timeout = usbnet_tx_timeout, 1250 .ndo_change_mtu = usbnet_change_mtu, 1251 .ndo_get_stats64 = usbnet_get_stats64, 1252 .ndo_set_mac_address = eth_mac_addr, 1253 .ndo_validate_addr = eth_validate_addr, 1254 .ndo_do_ioctl = smsc95xx_ioctl, 1255 .ndo_set_rx_mode = smsc95xx_set_multicast, 1256 .ndo_set_features = smsc95xx_set_features, 1257 }; 1258 1259 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1260 { 1261 struct smsc95xx_priv *pdata = NULL; 1262 u32 val; 1263 int ret; 1264 1265 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1266 1267 ret = usbnet_get_endpoints(dev, intf); 1268 if (ret < 0) { 1269 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1270 return ret; 1271 } 1272 1273 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv), 1274 GFP_KERNEL); 1275 1276 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1277 if (!pdata) 1278 return -ENOMEM; 1279 1280 spin_lock_init(&pdata->mac_cr_lock); 1281 1282 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1283 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1284 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1285 * it is transmitted as all ones. The zero transmitted checksum means 1286 * transmitter generated no checksum. Hence, enable csum offload only 1287 * for ipv4 packets. 1288 */ 1289 if (DEFAULT_TX_CSUM_ENABLE) 1290 dev->net->features |= NETIF_F_IP_CSUM; 1291 if (DEFAULT_RX_CSUM_ENABLE) 1292 dev->net->features |= NETIF_F_RXCSUM; 1293 1294 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1295 1296 smsc95xx_init_mac_address(dev); 1297 1298 /* Init all registers */ 1299 ret = smsc95xx_reset(dev); 1300 1301 /* detect device revision as different features may be available */ 1302 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1303 if (ret < 0) 1304 return ret; 1305 val >>= 16; 1306 pdata->chip_id = val; 1307 pdata->mdix_ctrl = get_mdix_status(dev->net); 1308 1309 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1310 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1311 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1312 FEATURE_PHY_NLP_CROSSOVER | 1313 FEATURE_REMOTE_WAKEUP); 1314 else if (val == ID_REV_CHIP_ID_9512_) 1315 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1316 1317 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1318 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1319 dev->net->flags |= IFF_MULTICAST; 1320 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1321 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1322 1323 pdata->dev = dev; 1324 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier); 1325 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1326 1327 return 0; 1328 } 1329 1330 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1331 { 1332 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1333 1334 if (pdata) { 1335 cancel_delayed_work(&pdata->carrier_check); 1336 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1337 kfree(pdata); 1338 pdata = NULL; 1339 dev->data[0] = 0; 1340 } 1341 } 1342 1343 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1344 { 1345 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1346 return crc << ((filter % 2) * 16); 1347 } 1348 1349 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1350 { 1351 struct mii_if_info *mii = &dev->mii; 1352 int ret; 1353 1354 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1355 1356 /* read to clear */ 1357 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC); 1358 if (ret < 0) 1359 return ret; 1360 1361 /* enable interrupt source */ 1362 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK); 1363 if (ret < 0) 1364 return ret; 1365 1366 ret |= mask; 1367 1368 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret); 1369 1370 return 0; 1371 } 1372 1373 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1374 { 1375 struct mii_if_info *mii = &dev->mii; 1376 int ret; 1377 1378 /* first, a dummy read, needed to latch some MII phys */ 1379 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1380 if (ret < 0) 1381 return ret; 1382 1383 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1384 if (ret < 0) 1385 return ret; 1386 1387 return !!(ret & BMSR_LSTATUS); 1388 } 1389 1390 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1391 { 1392 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1393 u32 val; 1394 int ret; 1395 1396 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1397 if (ret < 0) 1398 return ret; 1399 1400 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1401 val |= PM_CTL_SUS_MODE_0; 1402 1403 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1404 if (ret < 0) 1405 return ret; 1406 1407 /* clear wol status */ 1408 val &= ~PM_CTL_WUPS_; 1409 val |= PM_CTL_WUPS_WOL_; 1410 1411 /* enable energy detection */ 1412 if (pdata->wolopts & WAKE_PHY) 1413 val |= PM_CTL_WUPS_ED_; 1414 1415 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1416 if (ret < 0) 1417 return ret; 1418 1419 /* read back PM_CTRL */ 1420 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1421 if (ret < 0) 1422 return ret; 1423 1424 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1425 1426 return 0; 1427 } 1428 1429 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1430 { 1431 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1432 struct mii_if_info *mii = &dev->mii; 1433 u32 val; 1434 int ret; 1435 1436 /* reconfigure link pulse detection timing for 1437 * compatibility with non-standard link partners 1438 */ 1439 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1440 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG, 1441 PHY_EDPD_CONFIG_DEFAULT); 1442 1443 /* enable energy detect power-down mode */ 1444 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS); 1445 if (ret < 0) 1446 return ret; 1447 1448 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1449 1450 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret); 1451 1452 /* enter SUSPEND1 mode */ 1453 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1454 if (ret < 0) 1455 return ret; 1456 1457 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1458 val |= PM_CTL_SUS_MODE_1; 1459 1460 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1461 if (ret < 0) 1462 return ret; 1463 1464 /* clear wol status, enable energy detection */ 1465 val &= ~PM_CTL_WUPS_; 1466 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1467 1468 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1469 if (ret < 0) 1470 return ret; 1471 1472 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1473 1474 return 0; 1475 } 1476 1477 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1478 { 1479 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1480 u32 val; 1481 int ret; 1482 1483 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1484 if (ret < 0) 1485 return ret; 1486 1487 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1488 val |= PM_CTL_SUS_MODE_2; 1489 1490 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1491 if (ret < 0) 1492 return ret; 1493 1494 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1495 1496 return 0; 1497 } 1498 1499 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1500 { 1501 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1502 u32 val; 1503 int ret; 1504 1505 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1506 if (ret < 0) 1507 return ret; 1508 1509 if (val & RX_FIFO_INF_USED_) { 1510 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1511 return -EBUSY; 1512 } 1513 1514 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1515 if (ret < 0) 1516 return ret; 1517 1518 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1519 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1520 1521 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1522 if (ret < 0) 1523 return ret; 1524 1525 /* clear wol status */ 1526 val &= ~PM_CTL_WUPS_; 1527 val |= PM_CTL_WUPS_WOL_; 1528 1529 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1530 if (ret < 0) 1531 return ret; 1532 1533 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1534 1535 return 0; 1536 } 1537 1538 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1539 { 1540 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1541 int ret; 1542 1543 if (!netif_running(dev->net)) { 1544 /* interface is ifconfig down so fully power down hw */ 1545 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1546 return smsc95xx_enter_suspend2(dev); 1547 } 1548 1549 if (!link_up) { 1550 /* link is down so enter EDPD mode, but only if device can 1551 * reliably resume from it. This check should be redundant 1552 * as current FEATURE_REMOTE_WAKEUP parts also support 1553 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1554 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1555 netdev_warn(dev->net, "EDPD not supported\n"); 1556 return -EBUSY; 1557 } 1558 1559 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1560 1561 /* enable PHY wakeup events for if cable is attached */ 1562 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1563 PHY_INT_MASK_ANEG_COMP_); 1564 if (ret < 0) { 1565 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1566 return ret; 1567 } 1568 1569 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1570 return smsc95xx_enter_suspend1(dev); 1571 } 1572 1573 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1574 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1575 PHY_INT_MASK_LINK_DOWN_); 1576 if (ret < 0) { 1577 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1578 return ret; 1579 } 1580 1581 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1582 return smsc95xx_enter_suspend3(dev); 1583 } 1584 1585 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1586 { 1587 struct usbnet *dev = usb_get_intfdata(intf); 1588 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1589 u32 val, link_up; 1590 int ret; 1591 1592 ret = usbnet_suspend(intf, message); 1593 if (ret < 0) { 1594 netdev_warn(dev->net, "usbnet_suspend error\n"); 1595 return ret; 1596 } 1597 1598 if (pdata->suspend_flags) { 1599 netdev_warn(dev->net, "error during last resume\n"); 1600 pdata->suspend_flags = 0; 1601 } 1602 1603 /* determine if link is up using only _nopm functions */ 1604 link_up = smsc95xx_link_ok_nopm(dev); 1605 1606 if (message.event == PM_EVENT_AUTO_SUSPEND && 1607 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1608 ret = smsc95xx_autosuspend(dev, link_up); 1609 goto done; 1610 } 1611 1612 /* if we get this far we're not autosuspending */ 1613 /* if no wol options set, or if link is down and we're not waking on 1614 * PHY activity, enter lowest power SUSPEND2 mode 1615 */ 1616 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1617 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1618 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1619 1620 /* disable energy detect (link up) & wake up events */ 1621 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1622 if (ret < 0) 1623 goto done; 1624 1625 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1626 1627 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1628 if (ret < 0) 1629 goto done; 1630 1631 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1632 if (ret < 0) 1633 goto done; 1634 1635 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1636 1637 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1638 if (ret < 0) 1639 goto done; 1640 1641 ret = smsc95xx_enter_suspend2(dev); 1642 goto done; 1643 } 1644 1645 if (pdata->wolopts & WAKE_PHY) { 1646 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1647 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1648 if (ret < 0) { 1649 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1650 goto done; 1651 } 1652 1653 /* if link is down then configure EDPD and enter SUSPEND1, 1654 * otherwise enter SUSPEND0 below 1655 */ 1656 if (!link_up) { 1657 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1658 ret = smsc95xx_enter_suspend1(dev); 1659 goto done; 1660 } 1661 } 1662 1663 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1664 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL); 1665 u32 command[2]; 1666 u32 offset[2]; 1667 u32 crc[4]; 1668 int wuff_filter_count = 1669 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1670 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1671 int i, filter = 0; 1672 1673 if (!filter_mask) { 1674 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1675 ret = -ENOMEM; 1676 goto done; 1677 } 1678 1679 memset(command, 0, sizeof(command)); 1680 memset(offset, 0, sizeof(offset)); 1681 memset(crc, 0, sizeof(crc)); 1682 1683 if (pdata->wolopts & WAKE_BCAST) { 1684 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1685 netdev_info(dev->net, "enabling broadcast detection\n"); 1686 filter_mask[filter * 4] = 0x003F; 1687 filter_mask[filter * 4 + 1] = 0x00; 1688 filter_mask[filter * 4 + 2] = 0x00; 1689 filter_mask[filter * 4 + 3] = 0x00; 1690 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1691 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1692 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1693 filter++; 1694 } 1695 1696 if (pdata->wolopts & WAKE_MCAST) { 1697 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1698 netdev_info(dev->net, "enabling multicast detection\n"); 1699 filter_mask[filter * 4] = 0x0007; 1700 filter_mask[filter * 4 + 1] = 0x00; 1701 filter_mask[filter * 4 + 2] = 0x00; 1702 filter_mask[filter * 4 + 3] = 0x00; 1703 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1704 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1705 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1706 filter++; 1707 } 1708 1709 if (pdata->wolopts & WAKE_ARP) { 1710 const u8 arp[] = {0x08, 0x06}; 1711 netdev_info(dev->net, "enabling ARP detection\n"); 1712 filter_mask[filter * 4] = 0x0003; 1713 filter_mask[filter * 4 + 1] = 0x00; 1714 filter_mask[filter * 4 + 2] = 0x00; 1715 filter_mask[filter * 4 + 3] = 0x00; 1716 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1717 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1718 crc[filter/2] |= smsc_crc(arp, 2, filter); 1719 filter++; 1720 } 1721 1722 if (pdata->wolopts & WAKE_UCAST) { 1723 netdev_info(dev->net, "enabling unicast detection\n"); 1724 filter_mask[filter * 4] = 0x003F; 1725 filter_mask[filter * 4 + 1] = 0x00; 1726 filter_mask[filter * 4 + 2] = 0x00; 1727 filter_mask[filter * 4 + 3] = 0x00; 1728 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1729 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1730 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1731 filter++; 1732 } 1733 1734 for (i = 0; i < (wuff_filter_count * 4); i++) { 1735 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1736 if (ret < 0) { 1737 kfree(filter_mask); 1738 goto done; 1739 } 1740 } 1741 kfree(filter_mask); 1742 1743 for (i = 0; i < (wuff_filter_count / 4); i++) { 1744 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1745 if (ret < 0) 1746 goto done; 1747 } 1748 1749 for (i = 0; i < (wuff_filter_count / 4); i++) { 1750 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1751 if (ret < 0) 1752 goto done; 1753 } 1754 1755 for (i = 0; i < (wuff_filter_count / 2); i++) { 1756 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1757 if (ret < 0) 1758 goto done; 1759 } 1760 1761 /* clear any pending pattern match packet status */ 1762 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1763 if (ret < 0) 1764 goto done; 1765 1766 val |= WUCSR_WUFR_; 1767 1768 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1769 if (ret < 0) 1770 goto done; 1771 } 1772 1773 if (pdata->wolopts & WAKE_MAGIC) { 1774 /* clear any pending magic packet status */ 1775 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1776 if (ret < 0) 1777 goto done; 1778 1779 val |= WUCSR_MPR_; 1780 1781 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1782 if (ret < 0) 1783 goto done; 1784 } 1785 1786 /* enable/disable wakeup sources */ 1787 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1788 if (ret < 0) 1789 goto done; 1790 1791 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1792 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1793 val |= WUCSR_WAKE_EN_; 1794 } else { 1795 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1796 val &= ~WUCSR_WAKE_EN_; 1797 } 1798 1799 if (pdata->wolopts & WAKE_MAGIC) { 1800 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1801 val |= WUCSR_MPEN_; 1802 } else { 1803 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1804 val &= ~WUCSR_MPEN_; 1805 } 1806 1807 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1808 if (ret < 0) 1809 goto done; 1810 1811 /* enable wol wakeup source */ 1812 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1813 if (ret < 0) 1814 goto done; 1815 1816 val |= PM_CTL_WOL_EN_; 1817 1818 /* phy energy detect wakeup source */ 1819 if (pdata->wolopts & WAKE_PHY) 1820 val |= PM_CTL_ED_EN_; 1821 1822 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1823 if (ret < 0) 1824 goto done; 1825 1826 /* enable receiver to enable frame reception */ 1827 smsc95xx_start_rx_path(dev, 1); 1828 1829 /* some wol options are enabled, so enter SUSPEND0 */ 1830 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1831 ret = smsc95xx_enter_suspend0(dev); 1832 1833 done: 1834 /* 1835 * TODO: resume() might need to handle the suspend failure 1836 * in system sleep 1837 */ 1838 if (ret && PMSG_IS_AUTO(message)) 1839 usbnet_resume(intf); 1840 return ret; 1841 } 1842 1843 static int smsc95xx_resume(struct usb_interface *intf) 1844 { 1845 struct usbnet *dev = usb_get_intfdata(intf); 1846 struct smsc95xx_priv *pdata; 1847 u8 suspend_flags; 1848 int ret; 1849 u32 val; 1850 1851 BUG_ON(!dev); 1852 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1853 suspend_flags = pdata->suspend_flags; 1854 1855 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1856 1857 /* do this first to ensure it's cleared even in error case */ 1858 pdata->suspend_flags = 0; 1859 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1860 1861 if (suspend_flags & SUSPEND_ALLMODES) { 1862 /* clear wake-up sources */ 1863 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1864 if (ret < 0) 1865 return ret; 1866 1867 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1868 1869 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1870 if (ret < 0) 1871 return ret; 1872 1873 /* clear wake-up status */ 1874 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1875 if (ret < 0) 1876 return ret; 1877 1878 val &= ~PM_CTL_WOL_EN_; 1879 val |= PM_CTL_WUPS_; 1880 1881 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1882 if (ret < 0) 1883 return ret; 1884 } 1885 1886 ret = usbnet_resume(intf); 1887 if (ret < 0) 1888 netdev_warn(dev->net, "usbnet_resume error\n"); 1889 1890 return ret; 1891 } 1892 1893 static int smsc95xx_reset_resume(struct usb_interface *intf) 1894 { 1895 struct usbnet *dev = usb_get_intfdata(intf); 1896 int ret; 1897 1898 ret = smsc95xx_reset(dev); 1899 if (ret < 0) 1900 return ret; 1901 1902 return smsc95xx_resume(intf); 1903 } 1904 1905 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1906 { 1907 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1908 skb->ip_summed = CHECKSUM_COMPLETE; 1909 skb_trim(skb, skb->len - 2); 1910 } 1911 1912 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1913 { 1914 /* This check is no longer done by usbnet */ 1915 if (skb->len < dev->net->hard_header_len) 1916 return 0; 1917 1918 while (skb->len > 0) { 1919 u32 header, align_count; 1920 struct sk_buff *ax_skb; 1921 unsigned char *packet; 1922 u16 size; 1923 1924 memcpy(&header, skb->data, sizeof(header)); 1925 le32_to_cpus(&header); 1926 skb_pull(skb, 4 + NET_IP_ALIGN); 1927 packet = skb->data; 1928 1929 /* get the packet length */ 1930 size = (u16)((header & RX_STS_FL_) >> 16); 1931 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1932 1933 if (unlikely(header & RX_STS_ES_)) { 1934 netif_dbg(dev, rx_err, dev->net, 1935 "Error header=0x%08x\n", header); 1936 dev->net->stats.rx_errors++; 1937 dev->net->stats.rx_dropped++; 1938 1939 if (header & RX_STS_CRC_) { 1940 dev->net->stats.rx_crc_errors++; 1941 } else { 1942 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1943 dev->net->stats.rx_frame_errors++; 1944 1945 if ((header & RX_STS_LE_) && 1946 (!(header & RX_STS_FT_))) 1947 dev->net->stats.rx_length_errors++; 1948 } 1949 } else { 1950 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1951 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1952 netif_dbg(dev, rx_err, dev->net, 1953 "size err header=0x%08x\n", header); 1954 return 0; 1955 } 1956 1957 /* last frame in this batch */ 1958 if (skb->len == size) { 1959 if (dev->net->features & NETIF_F_RXCSUM) 1960 smsc95xx_rx_csum_offload(skb); 1961 skb_trim(skb, skb->len - 4); /* remove fcs */ 1962 skb->truesize = size + sizeof(struct sk_buff); 1963 1964 return 1; 1965 } 1966 1967 ax_skb = skb_clone(skb, GFP_ATOMIC); 1968 if (unlikely(!ax_skb)) { 1969 netdev_warn(dev->net, "Error allocating skb\n"); 1970 return 0; 1971 } 1972 1973 ax_skb->len = size; 1974 ax_skb->data = packet; 1975 skb_set_tail_pointer(ax_skb, size); 1976 1977 if (dev->net->features & NETIF_F_RXCSUM) 1978 smsc95xx_rx_csum_offload(ax_skb); 1979 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1980 ax_skb->truesize = size + sizeof(struct sk_buff); 1981 1982 usbnet_skb_return(dev, ax_skb); 1983 } 1984 1985 skb_pull(skb, size); 1986 1987 /* padding bytes before the next frame starts */ 1988 if (skb->len) 1989 skb_pull(skb, align_count); 1990 } 1991 1992 return 1; 1993 } 1994 1995 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1996 { 1997 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1998 u16 high_16 = low_16 + skb->csum_offset; 1999 return (high_16 << 16) | low_16; 2000 } 2001 2002 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 2003 struct sk_buff *skb, gfp_t flags) 2004 { 2005 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 2006 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 2007 u32 tx_cmd_a, tx_cmd_b; 2008 2009 /* We do not advertise SG, so skbs should be already linearized */ 2010 BUG_ON(skb_shinfo(skb)->nr_frags); 2011 2012 /* Make writable and expand header space by overhead if required */ 2013 if (skb_cow_head(skb, overhead)) { 2014 /* Must deallocate here as returning NULL to indicate error 2015 * means the skb won't be deallocated in the caller. 2016 */ 2017 dev_kfree_skb_any(skb); 2018 return NULL; 2019 } 2020 2021 if (csum) { 2022 if (skb->len <= 45) { 2023 /* workaround - hardware tx checksum does not work 2024 * properly with extremely small packets */ 2025 long csstart = skb_checksum_start_offset(skb); 2026 __wsum calc = csum_partial(skb->data + csstart, 2027 skb->len - csstart, 0); 2028 *((__sum16 *)(skb->data + csstart 2029 + skb->csum_offset)) = csum_fold(calc); 2030 2031 csum = false; 2032 } else { 2033 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 2034 skb_push(skb, 4); 2035 cpu_to_le32s(&csum_preamble); 2036 memcpy(skb->data, &csum_preamble, 4); 2037 } 2038 } 2039 2040 skb_push(skb, 4); 2041 tx_cmd_b = (u32)(skb->len - 4); 2042 if (csum) 2043 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 2044 cpu_to_le32s(&tx_cmd_b); 2045 memcpy(skb->data, &tx_cmd_b, 4); 2046 2047 skb_push(skb, 4); 2048 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ | 2049 TX_CMD_A_LAST_SEG_; 2050 cpu_to_le32s(&tx_cmd_a); 2051 memcpy(skb->data, &tx_cmd_a, 4); 2052 2053 return skb; 2054 } 2055 2056 static int smsc95xx_manage_power(struct usbnet *dev, int on) 2057 { 2058 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 2059 2060 dev->intf->needs_remote_wakeup = on; 2061 2062 if (pdata->features & FEATURE_REMOTE_WAKEUP) 2063 return 0; 2064 2065 /* this chip revision isn't capable of remote wakeup */ 2066 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 2067 2068 if (on) 2069 usb_autopm_get_interface_no_resume(dev->intf); 2070 else 2071 usb_autopm_put_interface(dev->intf); 2072 2073 return 0; 2074 } 2075 2076 static const struct driver_info smsc95xx_info = { 2077 .description = "smsc95xx USB 2.0 Ethernet", 2078 .bind = smsc95xx_bind, 2079 .unbind = smsc95xx_unbind, 2080 .link_reset = smsc95xx_link_reset, 2081 .reset = smsc95xx_reset, 2082 .rx_fixup = smsc95xx_rx_fixup, 2083 .tx_fixup = smsc95xx_tx_fixup, 2084 .status = smsc95xx_status, 2085 .manage_power = smsc95xx_manage_power, 2086 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2087 }; 2088 2089 static const struct usb_device_id products[] = { 2090 { 2091 /* SMSC9500 USB Ethernet Device */ 2092 USB_DEVICE(0x0424, 0x9500), 2093 .driver_info = (unsigned long) &smsc95xx_info, 2094 }, 2095 { 2096 /* SMSC9505 USB Ethernet Device */ 2097 USB_DEVICE(0x0424, 0x9505), 2098 .driver_info = (unsigned long) &smsc95xx_info, 2099 }, 2100 { 2101 /* SMSC9500A USB Ethernet Device */ 2102 USB_DEVICE(0x0424, 0x9E00), 2103 .driver_info = (unsigned long) &smsc95xx_info, 2104 }, 2105 { 2106 /* SMSC9505A USB Ethernet Device */ 2107 USB_DEVICE(0x0424, 0x9E01), 2108 .driver_info = (unsigned long) &smsc95xx_info, 2109 }, 2110 { 2111 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2112 USB_DEVICE(0x0424, 0xec00), 2113 .driver_info = (unsigned long) &smsc95xx_info, 2114 }, 2115 { 2116 /* SMSC9500 USB Ethernet Device (SAL10) */ 2117 USB_DEVICE(0x0424, 0x9900), 2118 .driver_info = (unsigned long) &smsc95xx_info, 2119 }, 2120 { 2121 /* SMSC9505 USB Ethernet Device (SAL10) */ 2122 USB_DEVICE(0x0424, 0x9901), 2123 .driver_info = (unsigned long) &smsc95xx_info, 2124 }, 2125 { 2126 /* SMSC9500A USB Ethernet Device (SAL10) */ 2127 USB_DEVICE(0x0424, 0x9902), 2128 .driver_info = (unsigned long) &smsc95xx_info, 2129 }, 2130 { 2131 /* SMSC9505A USB Ethernet Device (SAL10) */ 2132 USB_DEVICE(0x0424, 0x9903), 2133 .driver_info = (unsigned long) &smsc95xx_info, 2134 }, 2135 { 2136 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2137 USB_DEVICE(0x0424, 0x9904), 2138 .driver_info = (unsigned long) &smsc95xx_info, 2139 }, 2140 { 2141 /* SMSC9500A USB Ethernet Device (HAL) */ 2142 USB_DEVICE(0x0424, 0x9905), 2143 .driver_info = (unsigned long) &smsc95xx_info, 2144 }, 2145 { 2146 /* SMSC9505A USB Ethernet Device (HAL) */ 2147 USB_DEVICE(0x0424, 0x9906), 2148 .driver_info = (unsigned long) &smsc95xx_info, 2149 }, 2150 { 2151 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2152 USB_DEVICE(0x0424, 0x9907), 2153 .driver_info = (unsigned long) &smsc95xx_info, 2154 }, 2155 { 2156 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2157 USB_DEVICE(0x0424, 0x9908), 2158 .driver_info = (unsigned long) &smsc95xx_info, 2159 }, 2160 { 2161 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2162 USB_DEVICE(0x0424, 0x9909), 2163 .driver_info = (unsigned long) &smsc95xx_info, 2164 }, 2165 { 2166 /* SMSC LAN9530 USB Ethernet Device */ 2167 USB_DEVICE(0x0424, 0x9530), 2168 .driver_info = (unsigned long) &smsc95xx_info, 2169 }, 2170 { 2171 /* SMSC LAN9730 USB Ethernet Device */ 2172 USB_DEVICE(0x0424, 0x9730), 2173 .driver_info = (unsigned long) &smsc95xx_info, 2174 }, 2175 { 2176 /* SMSC LAN89530 USB Ethernet Device */ 2177 USB_DEVICE(0x0424, 0x9E08), 2178 .driver_info = (unsigned long) &smsc95xx_info, 2179 }, 2180 { }, /* END */ 2181 }; 2182 MODULE_DEVICE_TABLE(usb, products); 2183 2184 static struct usb_driver smsc95xx_driver = { 2185 .name = "smsc95xx", 2186 .id_table = products, 2187 .probe = usbnet_probe, 2188 .suspend = smsc95xx_suspend, 2189 .resume = smsc95xx_resume, 2190 .reset_resume = smsc95xx_reset_resume, 2191 .disconnect = usbnet_disconnect, 2192 .disable_hub_initiated_lpm = 1, 2193 .supports_autosuspend = 1, 2194 }; 2195 2196 module_usb_driver(smsc95xx_driver); 2197 2198 MODULE_AUTHOR("Nancy Lin"); 2199 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2200 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2201 MODULE_LICENSE("GPL"); 2202