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 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 778 return -EINVAL; 779 780 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 781 782 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 783 if (ret < 0) 784 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 785 786 return ret; 787 } 788 789 static int get_mdix_status(struct net_device *net) 790 { 791 struct usbnet *dev = netdev_priv(net); 792 u32 val; 793 int buf; 794 795 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS); 796 if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) { 797 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_) 798 return ETH_TP_MDI_AUTO; 799 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_) 800 return ETH_TP_MDI_X; 801 } else { 802 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val); 803 if (val & STRAP_STATUS_AMDIX_EN_) 804 return ETH_TP_MDI_AUTO; 805 } 806 807 return ETH_TP_MDI; 808 } 809 810 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl) 811 { 812 struct usbnet *dev = netdev_priv(net); 813 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 814 int buf; 815 816 if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) || 817 (pdata->chip_id == ID_REV_CHIP_ID_9530_) || 818 (pdata->chip_id == ID_REV_CHIP_ID_89530_) || 819 (pdata->chip_id == ID_REV_CHIP_ID_9730_)) { 820 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */ 821 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 822 PHY_EDPD_CONFIG); 823 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_; 824 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 825 PHY_EDPD_CONFIG, buf); 826 } 827 828 if (mdix_ctrl == ETH_TP_MDI) { 829 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 830 SPECIAL_CTRL_STS); 831 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_; 832 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 833 SPECIAL_CTRL_STS_AMDIX_STATE_); 834 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 835 SPECIAL_CTRL_STS, buf); 836 } else if (mdix_ctrl == ETH_TP_MDI_X) { 837 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 838 SPECIAL_CTRL_STS); 839 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_; 840 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 841 SPECIAL_CTRL_STS_AMDIX_STATE_); 842 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_; 843 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 844 SPECIAL_CTRL_STS, buf); 845 } else if (mdix_ctrl == ETH_TP_MDI_AUTO) { 846 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 847 SPECIAL_CTRL_STS); 848 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_; 849 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 850 SPECIAL_CTRL_STS_AMDIX_STATE_); 851 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_; 852 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 853 SPECIAL_CTRL_STS, buf); 854 } 855 pdata->mdix_ctrl = mdix_ctrl; 856 } 857 858 static int smsc95xx_get_link_ksettings(struct net_device *net, 859 struct ethtool_link_ksettings *cmd) 860 { 861 struct usbnet *dev = netdev_priv(net); 862 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 863 int retval; 864 865 retval = usbnet_get_link_ksettings(net, cmd); 866 867 cmd->base.eth_tp_mdix = pdata->mdix_ctrl; 868 cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl; 869 870 return retval; 871 } 872 873 static int smsc95xx_set_link_ksettings(struct net_device *net, 874 const struct ethtool_link_ksettings *cmd) 875 { 876 struct usbnet *dev = netdev_priv(net); 877 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 878 int retval; 879 880 if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl) 881 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl); 882 883 retval = usbnet_set_link_ksettings(net, cmd); 884 885 return retval; 886 } 887 888 static const struct ethtool_ops smsc95xx_ethtool_ops = { 889 .get_link = usbnet_get_link, 890 .nway_reset = usbnet_nway_reset, 891 .get_drvinfo = usbnet_get_drvinfo, 892 .get_msglevel = usbnet_get_msglevel, 893 .set_msglevel = usbnet_set_msglevel, 894 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 895 .get_eeprom = smsc95xx_ethtool_get_eeprom, 896 .set_eeprom = smsc95xx_ethtool_set_eeprom, 897 .get_regs_len = smsc95xx_ethtool_getregslen, 898 .get_regs = smsc95xx_ethtool_getregs, 899 .get_wol = smsc95xx_ethtool_get_wol, 900 .set_wol = smsc95xx_ethtool_set_wol, 901 .get_link_ksettings = smsc95xx_get_link_ksettings, 902 .set_link_ksettings = smsc95xx_set_link_ksettings, 903 .get_ts_info = ethtool_op_get_ts_info, 904 }; 905 906 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 907 { 908 struct usbnet *dev = netdev_priv(netdev); 909 910 if (!netif_running(netdev)) 911 return -EINVAL; 912 913 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 914 } 915 916 static void smsc95xx_init_mac_address(struct usbnet *dev) 917 { 918 const u8 *mac_addr; 919 920 /* maybe the boot loader passed the MAC address in devicetree */ 921 mac_addr = of_get_mac_address(dev->udev->dev.of_node); 922 if (mac_addr) { 923 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN); 924 return; 925 } 926 927 /* try reading mac address from EEPROM */ 928 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 929 dev->net->dev_addr) == 0) { 930 if (is_valid_ether_addr(dev->net->dev_addr)) { 931 /* eeprom values are valid so use them */ 932 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 933 return; 934 } 935 } 936 937 /* no useful static MAC address found. generate a random one */ 938 eth_hw_addr_random(dev->net); 939 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 940 } 941 942 static int smsc95xx_set_mac_address(struct usbnet *dev) 943 { 944 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 945 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 946 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 947 int ret; 948 949 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 950 if (ret < 0) 951 return ret; 952 953 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 954 } 955 956 /* starts the TX path */ 957 static int smsc95xx_start_tx_path(struct usbnet *dev) 958 { 959 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 960 unsigned long flags; 961 int ret; 962 963 /* Enable Tx at MAC */ 964 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 965 pdata->mac_cr |= MAC_CR_TXEN_; 966 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 967 968 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 969 if (ret < 0) 970 return ret; 971 972 /* Enable Tx at SCSRs */ 973 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 974 } 975 976 /* Starts the Receive path */ 977 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 978 { 979 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 980 unsigned long flags; 981 982 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 983 pdata->mac_cr |= MAC_CR_RXEN_; 984 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 985 986 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 987 } 988 989 static int smsc95xx_phy_initialize(struct usbnet *dev) 990 { 991 int bmcr, ret, timeout = 0; 992 993 /* Initialize MII structure */ 994 dev->mii.dev = dev->net; 995 dev->mii.mdio_read = smsc95xx_mdio_read; 996 dev->mii.mdio_write = smsc95xx_mdio_write; 997 dev->mii.phy_id_mask = 0x1f; 998 dev->mii.reg_num_mask = 0x1f; 999 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID; 1000 1001 /* reset phy and wait for reset to complete */ 1002 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 1003 1004 do { 1005 msleep(10); 1006 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR); 1007 timeout++; 1008 } while ((bmcr & BMCR_RESET) && (timeout < 100)); 1009 1010 if (timeout >= 100) { 1011 netdev_warn(dev->net, "timeout on PHY Reset"); 1012 return -EIO; 1013 } 1014 1015 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 1016 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | 1017 ADVERTISE_PAUSE_ASYM); 1018 1019 /* read to clear */ 1020 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); 1021 if (ret < 0) { 1022 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n"); 1023 return ret; 1024 } 1025 1026 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, 1027 PHY_INT_MASK_DEFAULT_); 1028 mii_nway_restart(&dev->mii); 1029 1030 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n"); 1031 return 0; 1032 } 1033 1034 static int smsc95xx_reset(struct usbnet *dev) 1035 { 1036 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1037 u32 read_buf, write_buf, burst_cap; 1038 int ret = 0, timeout; 1039 1040 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 1041 1042 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 1043 if (ret < 0) 1044 return ret; 1045 1046 timeout = 0; 1047 do { 1048 msleep(10); 1049 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1050 if (ret < 0) 1051 return ret; 1052 timeout++; 1053 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 1054 1055 if (timeout >= 100) { 1056 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 1057 return ret; 1058 } 1059 1060 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 1061 if (ret < 0) 1062 return ret; 1063 1064 timeout = 0; 1065 do { 1066 msleep(10); 1067 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 1068 if (ret < 0) 1069 return ret; 1070 timeout++; 1071 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 1072 1073 if (timeout >= 100) { 1074 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1075 return ret; 1076 } 1077 1078 ret = smsc95xx_set_mac_address(dev); 1079 if (ret < 0) 1080 return ret; 1081 1082 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 1083 dev->net->dev_addr); 1084 1085 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1086 if (ret < 0) 1087 return ret; 1088 1089 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 1090 read_buf); 1091 1092 read_buf |= HW_CFG_BIR_; 1093 1094 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1095 if (ret < 0) 1096 return ret; 1097 1098 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1099 if (ret < 0) 1100 return ret; 1101 1102 netif_dbg(dev, ifup, dev->net, 1103 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 1104 read_buf); 1105 1106 if (!turbo_mode) { 1107 burst_cap = 0; 1108 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 1109 } else if (dev->udev->speed == USB_SPEED_HIGH) { 1110 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 1111 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 1112 } else { 1113 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 1114 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 1115 } 1116 1117 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 1118 (ulong)dev->rx_urb_size); 1119 1120 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 1121 if (ret < 0) 1122 return ret; 1123 1124 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 1125 if (ret < 0) 1126 return ret; 1127 1128 netif_dbg(dev, ifup, dev->net, 1129 "Read Value from BURST_CAP after writing: 0x%08x\n", 1130 read_buf); 1131 1132 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1133 if (ret < 0) 1134 return ret; 1135 1136 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 1137 if (ret < 0) 1138 return ret; 1139 1140 netif_dbg(dev, ifup, dev->net, 1141 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 1142 read_buf); 1143 1144 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1145 if (ret < 0) 1146 return ret; 1147 1148 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 1149 read_buf); 1150 1151 if (turbo_mode) 1152 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 1153 1154 read_buf &= ~HW_CFG_RXDOFF_; 1155 1156 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 1157 read_buf |= NET_IP_ALIGN << 9; 1158 1159 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1160 if (ret < 0) 1161 return ret; 1162 1163 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1164 if (ret < 0) 1165 return ret; 1166 1167 netif_dbg(dev, ifup, dev->net, 1168 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 1169 1170 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 1171 if (ret < 0) 1172 return ret; 1173 1174 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1175 if (ret < 0) 1176 return ret; 1177 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1178 1179 /* Configure GPIO pins as LED outputs */ 1180 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1181 LED_GPIO_CFG_FDX_LED; 1182 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 1183 if (ret < 0) 1184 return ret; 1185 1186 /* Init Tx */ 1187 ret = smsc95xx_write_reg(dev, FLOW, 0); 1188 if (ret < 0) 1189 return ret; 1190 1191 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1192 if (ret < 0) 1193 return ret; 1194 1195 /* Don't need mac_cr_lock during initialisation */ 1196 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1197 if (ret < 0) 1198 return ret; 1199 1200 /* Init Rx */ 1201 /* Set Vlan */ 1202 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1203 if (ret < 0) 1204 return ret; 1205 1206 /* Enable or disable checksum offload engines */ 1207 ret = smsc95xx_set_features(dev->net, dev->net->features); 1208 if (ret < 0) { 1209 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1210 return ret; 1211 } 1212 1213 smsc95xx_set_multicast(dev->net); 1214 1215 ret = smsc95xx_phy_initialize(dev); 1216 if (ret < 0) { 1217 netdev_warn(dev->net, "Failed to init PHY\n"); 1218 return ret; 1219 } 1220 1221 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1222 if (ret < 0) 1223 return ret; 1224 1225 /* enable PHY interrupts */ 1226 read_buf |= INT_EP_CTL_PHY_INT_; 1227 1228 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1229 if (ret < 0) 1230 return ret; 1231 1232 ret = smsc95xx_start_tx_path(dev); 1233 if (ret < 0) { 1234 netdev_warn(dev->net, "Failed to start TX path\n"); 1235 return ret; 1236 } 1237 1238 ret = smsc95xx_start_rx_path(dev, 0); 1239 if (ret < 0) { 1240 netdev_warn(dev->net, "Failed to start RX path\n"); 1241 return ret; 1242 } 1243 1244 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1245 return 0; 1246 } 1247 1248 static const struct net_device_ops smsc95xx_netdev_ops = { 1249 .ndo_open = usbnet_open, 1250 .ndo_stop = usbnet_stop, 1251 .ndo_start_xmit = usbnet_start_xmit, 1252 .ndo_tx_timeout = usbnet_tx_timeout, 1253 .ndo_change_mtu = usbnet_change_mtu, 1254 .ndo_get_stats64 = usbnet_get_stats64, 1255 .ndo_set_mac_address = eth_mac_addr, 1256 .ndo_validate_addr = eth_validate_addr, 1257 .ndo_do_ioctl = smsc95xx_ioctl, 1258 .ndo_set_rx_mode = smsc95xx_set_multicast, 1259 .ndo_set_features = smsc95xx_set_features, 1260 }; 1261 1262 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1263 { 1264 struct smsc95xx_priv *pdata = NULL; 1265 u32 val; 1266 int ret; 1267 1268 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1269 1270 ret = usbnet_get_endpoints(dev, intf); 1271 if (ret < 0) { 1272 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1273 return ret; 1274 } 1275 1276 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv), 1277 GFP_KERNEL); 1278 1279 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1280 if (!pdata) 1281 return -ENOMEM; 1282 1283 spin_lock_init(&pdata->mac_cr_lock); 1284 1285 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1286 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1287 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1288 * it is transmitted as all ones. The zero transmitted checksum means 1289 * transmitter generated no checksum. Hence, enable csum offload only 1290 * for ipv4 packets. 1291 */ 1292 if (DEFAULT_TX_CSUM_ENABLE) 1293 dev->net->features |= NETIF_F_IP_CSUM; 1294 if (DEFAULT_RX_CSUM_ENABLE) 1295 dev->net->features |= NETIF_F_RXCSUM; 1296 1297 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1298 1299 smsc95xx_init_mac_address(dev); 1300 1301 /* Init all registers */ 1302 ret = smsc95xx_reset(dev); 1303 1304 /* detect device revision as different features may be available */ 1305 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1306 if (ret < 0) 1307 return ret; 1308 val >>= 16; 1309 pdata->chip_id = val; 1310 pdata->mdix_ctrl = get_mdix_status(dev->net); 1311 1312 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1313 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1314 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1315 FEATURE_PHY_NLP_CROSSOVER | 1316 FEATURE_REMOTE_WAKEUP); 1317 else if (val == ID_REV_CHIP_ID_9512_) 1318 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1319 1320 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1321 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1322 dev->net->flags |= IFF_MULTICAST; 1323 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1324 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1325 1326 pdata->dev = dev; 1327 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier); 1328 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1329 1330 return 0; 1331 } 1332 1333 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1334 { 1335 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1336 1337 if (pdata) { 1338 cancel_delayed_work(&pdata->carrier_check); 1339 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1340 kfree(pdata); 1341 pdata = NULL; 1342 dev->data[0] = 0; 1343 } 1344 } 1345 1346 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1347 { 1348 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1349 return crc << ((filter % 2) * 16); 1350 } 1351 1352 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1353 { 1354 struct mii_if_info *mii = &dev->mii; 1355 int ret; 1356 1357 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1358 1359 /* read to clear */ 1360 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC); 1361 if (ret < 0) 1362 return ret; 1363 1364 /* enable interrupt source */ 1365 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK); 1366 if (ret < 0) 1367 return ret; 1368 1369 ret |= mask; 1370 1371 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret); 1372 1373 return 0; 1374 } 1375 1376 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1377 { 1378 struct mii_if_info *mii = &dev->mii; 1379 int ret; 1380 1381 /* first, a dummy read, needed to latch some MII phys */ 1382 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1383 if (ret < 0) 1384 return ret; 1385 1386 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1387 if (ret < 0) 1388 return ret; 1389 1390 return !!(ret & BMSR_LSTATUS); 1391 } 1392 1393 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1394 { 1395 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1396 u32 val; 1397 int ret; 1398 1399 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1400 if (ret < 0) 1401 return ret; 1402 1403 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1404 val |= PM_CTL_SUS_MODE_0; 1405 1406 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1407 if (ret < 0) 1408 return ret; 1409 1410 /* clear wol status */ 1411 val &= ~PM_CTL_WUPS_; 1412 val |= PM_CTL_WUPS_WOL_; 1413 1414 /* enable energy detection */ 1415 if (pdata->wolopts & WAKE_PHY) 1416 val |= PM_CTL_WUPS_ED_; 1417 1418 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1419 if (ret < 0) 1420 return ret; 1421 1422 /* read back PM_CTRL */ 1423 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1424 if (ret < 0) 1425 return ret; 1426 1427 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1428 1429 return 0; 1430 } 1431 1432 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1433 { 1434 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1435 struct mii_if_info *mii = &dev->mii; 1436 u32 val; 1437 int ret; 1438 1439 /* reconfigure link pulse detection timing for 1440 * compatibility with non-standard link partners 1441 */ 1442 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1443 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG, 1444 PHY_EDPD_CONFIG_DEFAULT); 1445 1446 /* enable energy detect power-down mode */ 1447 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS); 1448 if (ret < 0) 1449 return ret; 1450 1451 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1452 1453 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret); 1454 1455 /* enter SUSPEND1 mode */ 1456 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1457 if (ret < 0) 1458 return ret; 1459 1460 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1461 val |= PM_CTL_SUS_MODE_1; 1462 1463 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1464 if (ret < 0) 1465 return ret; 1466 1467 /* clear wol status, enable energy detection */ 1468 val &= ~PM_CTL_WUPS_; 1469 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1470 1471 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1472 if (ret < 0) 1473 return ret; 1474 1475 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1476 1477 return 0; 1478 } 1479 1480 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1481 { 1482 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1483 u32 val; 1484 int ret; 1485 1486 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1487 if (ret < 0) 1488 return ret; 1489 1490 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1491 val |= PM_CTL_SUS_MODE_2; 1492 1493 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1494 if (ret < 0) 1495 return ret; 1496 1497 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1498 1499 return 0; 1500 } 1501 1502 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1503 { 1504 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1505 u32 val; 1506 int ret; 1507 1508 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1509 if (ret < 0) 1510 return ret; 1511 1512 if (val & RX_FIFO_INF_USED_) { 1513 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1514 return -EBUSY; 1515 } 1516 1517 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1518 if (ret < 0) 1519 return ret; 1520 1521 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1522 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1523 1524 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1525 if (ret < 0) 1526 return ret; 1527 1528 /* clear wol status */ 1529 val &= ~PM_CTL_WUPS_; 1530 val |= PM_CTL_WUPS_WOL_; 1531 1532 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1533 if (ret < 0) 1534 return ret; 1535 1536 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1537 1538 return 0; 1539 } 1540 1541 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1542 { 1543 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1544 int ret; 1545 1546 if (!netif_running(dev->net)) { 1547 /* interface is ifconfig down so fully power down hw */ 1548 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1549 return smsc95xx_enter_suspend2(dev); 1550 } 1551 1552 if (!link_up) { 1553 /* link is down so enter EDPD mode, but only if device can 1554 * reliably resume from it. This check should be redundant 1555 * as current FEATURE_REMOTE_WAKEUP parts also support 1556 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1557 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1558 netdev_warn(dev->net, "EDPD not supported\n"); 1559 return -EBUSY; 1560 } 1561 1562 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1563 1564 /* enable PHY wakeup events for if cable is attached */ 1565 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1566 PHY_INT_MASK_ANEG_COMP_); 1567 if (ret < 0) { 1568 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1569 return ret; 1570 } 1571 1572 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1573 return smsc95xx_enter_suspend1(dev); 1574 } 1575 1576 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1577 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1578 PHY_INT_MASK_LINK_DOWN_); 1579 if (ret < 0) { 1580 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1581 return ret; 1582 } 1583 1584 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1585 return smsc95xx_enter_suspend3(dev); 1586 } 1587 1588 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1589 { 1590 struct usbnet *dev = usb_get_intfdata(intf); 1591 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1592 u32 val, link_up; 1593 int ret; 1594 1595 ret = usbnet_suspend(intf, message); 1596 if (ret < 0) { 1597 netdev_warn(dev->net, "usbnet_suspend error\n"); 1598 return ret; 1599 } 1600 1601 if (pdata->suspend_flags) { 1602 netdev_warn(dev->net, "error during last resume\n"); 1603 pdata->suspend_flags = 0; 1604 } 1605 1606 /* determine if link is up using only _nopm functions */ 1607 link_up = smsc95xx_link_ok_nopm(dev); 1608 1609 if (message.event == PM_EVENT_AUTO_SUSPEND && 1610 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1611 ret = smsc95xx_autosuspend(dev, link_up); 1612 goto done; 1613 } 1614 1615 /* if we get this far we're not autosuspending */ 1616 /* if no wol options set, or if link is down and we're not waking on 1617 * PHY activity, enter lowest power SUSPEND2 mode 1618 */ 1619 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1620 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1621 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1622 1623 /* disable energy detect (link up) & wake up events */ 1624 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1625 if (ret < 0) 1626 goto done; 1627 1628 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1629 1630 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1631 if (ret < 0) 1632 goto done; 1633 1634 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1635 if (ret < 0) 1636 goto done; 1637 1638 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1639 1640 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1641 if (ret < 0) 1642 goto done; 1643 1644 ret = smsc95xx_enter_suspend2(dev); 1645 goto done; 1646 } 1647 1648 if (pdata->wolopts & WAKE_PHY) { 1649 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1650 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1651 if (ret < 0) { 1652 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1653 goto done; 1654 } 1655 1656 /* if link is down then configure EDPD and enter SUSPEND1, 1657 * otherwise enter SUSPEND0 below 1658 */ 1659 if (!link_up) { 1660 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1661 ret = smsc95xx_enter_suspend1(dev); 1662 goto done; 1663 } 1664 } 1665 1666 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1667 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1668 u32 command[2]; 1669 u32 offset[2]; 1670 u32 crc[4]; 1671 int wuff_filter_count = 1672 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1673 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1674 int i, filter = 0; 1675 1676 if (!filter_mask) { 1677 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1678 ret = -ENOMEM; 1679 goto done; 1680 } 1681 1682 memset(command, 0, sizeof(command)); 1683 memset(offset, 0, sizeof(offset)); 1684 memset(crc, 0, sizeof(crc)); 1685 1686 if (pdata->wolopts & WAKE_BCAST) { 1687 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1688 netdev_info(dev->net, "enabling broadcast detection\n"); 1689 filter_mask[filter * 4] = 0x003F; 1690 filter_mask[filter * 4 + 1] = 0x00; 1691 filter_mask[filter * 4 + 2] = 0x00; 1692 filter_mask[filter * 4 + 3] = 0x00; 1693 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1694 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1695 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1696 filter++; 1697 } 1698 1699 if (pdata->wolopts & WAKE_MCAST) { 1700 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1701 netdev_info(dev->net, "enabling multicast detection\n"); 1702 filter_mask[filter * 4] = 0x0007; 1703 filter_mask[filter * 4 + 1] = 0x00; 1704 filter_mask[filter * 4 + 2] = 0x00; 1705 filter_mask[filter * 4 + 3] = 0x00; 1706 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1707 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1708 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1709 filter++; 1710 } 1711 1712 if (pdata->wolopts & WAKE_ARP) { 1713 const u8 arp[] = {0x08, 0x06}; 1714 netdev_info(dev->net, "enabling ARP detection\n"); 1715 filter_mask[filter * 4] = 0x0003; 1716 filter_mask[filter * 4 + 1] = 0x00; 1717 filter_mask[filter * 4 + 2] = 0x00; 1718 filter_mask[filter * 4 + 3] = 0x00; 1719 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1720 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1721 crc[filter/2] |= smsc_crc(arp, 2, filter); 1722 filter++; 1723 } 1724 1725 if (pdata->wolopts & WAKE_UCAST) { 1726 netdev_info(dev->net, "enabling unicast detection\n"); 1727 filter_mask[filter * 4] = 0x003F; 1728 filter_mask[filter * 4 + 1] = 0x00; 1729 filter_mask[filter * 4 + 2] = 0x00; 1730 filter_mask[filter * 4 + 3] = 0x00; 1731 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1732 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1733 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1734 filter++; 1735 } 1736 1737 for (i = 0; i < (wuff_filter_count * 4); i++) { 1738 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1739 if (ret < 0) { 1740 kfree(filter_mask); 1741 goto done; 1742 } 1743 } 1744 kfree(filter_mask); 1745 1746 for (i = 0; i < (wuff_filter_count / 4); i++) { 1747 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1748 if (ret < 0) 1749 goto done; 1750 } 1751 1752 for (i = 0; i < (wuff_filter_count / 4); i++) { 1753 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1754 if (ret < 0) 1755 goto done; 1756 } 1757 1758 for (i = 0; i < (wuff_filter_count / 2); i++) { 1759 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1760 if (ret < 0) 1761 goto done; 1762 } 1763 1764 /* clear any pending pattern match packet status */ 1765 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1766 if (ret < 0) 1767 goto done; 1768 1769 val |= WUCSR_WUFR_; 1770 1771 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1772 if (ret < 0) 1773 goto done; 1774 } 1775 1776 if (pdata->wolopts & WAKE_MAGIC) { 1777 /* clear any pending magic packet status */ 1778 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1779 if (ret < 0) 1780 goto done; 1781 1782 val |= WUCSR_MPR_; 1783 1784 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1785 if (ret < 0) 1786 goto done; 1787 } 1788 1789 /* enable/disable wakeup sources */ 1790 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1791 if (ret < 0) 1792 goto done; 1793 1794 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1795 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1796 val |= WUCSR_WAKE_EN_; 1797 } else { 1798 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1799 val &= ~WUCSR_WAKE_EN_; 1800 } 1801 1802 if (pdata->wolopts & WAKE_MAGIC) { 1803 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1804 val |= WUCSR_MPEN_; 1805 } else { 1806 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1807 val &= ~WUCSR_MPEN_; 1808 } 1809 1810 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1811 if (ret < 0) 1812 goto done; 1813 1814 /* enable wol wakeup source */ 1815 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1816 if (ret < 0) 1817 goto done; 1818 1819 val |= PM_CTL_WOL_EN_; 1820 1821 /* phy energy detect wakeup source */ 1822 if (pdata->wolopts & WAKE_PHY) 1823 val |= PM_CTL_ED_EN_; 1824 1825 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1826 if (ret < 0) 1827 goto done; 1828 1829 /* enable receiver to enable frame reception */ 1830 smsc95xx_start_rx_path(dev, 1); 1831 1832 /* some wol options are enabled, so enter SUSPEND0 */ 1833 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1834 ret = smsc95xx_enter_suspend0(dev); 1835 1836 done: 1837 /* 1838 * TODO: resume() might need to handle the suspend failure 1839 * in system sleep 1840 */ 1841 if (ret && PMSG_IS_AUTO(message)) 1842 usbnet_resume(intf); 1843 return ret; 1844 } 1845 1846 static int smsc95xx_resume(struct usb_interface *intf) 1847 { 1848 struct usbnet *dev = usb_get_intfdata(intf); 1849 struct smsc95xx_priv *pdata; 1850 u8 suspend_flags; 1851 int ret; 1852 u32 val; 1853 1854 BUG_ON(!dev); 1855 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1856 suspend_flags = pdata->suspend_flags; 1857 1858 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1859 1860 /* do this first to ensure it's cleared even in error case */ 1861 pdata->suspend_flags = 0; 1862 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1863 1864 if (suspend_flags & SUSPEND_ALLMODES) { 1865 /* clear wake-up sources */ 1866 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1867 if (ret < 0) 1868 return ret; 1869 1870 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1871 1872 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1873 if (ret < 0) 1874 return ret; 1875 1876 /* clear wake-up status */ 1877 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1878 if (ret < 0) 1879 return ret; 1880 1881 val &= ~PM_CTL_WOL_EN_; 1882 val |= PM_CTL_WUPS_; 1883 1884 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1885 if (ret < 0) 1886 return ret; 1887 } 1888 1889 ret = usbnet_resume(intf); 1890 if (ret < 0) 1891 netdev_warn(dev->net, "usbnet_resume error\n"); 1892 1893 return ret; 1894 } 1895 1896 static int smsc95xx_reset_resume(struct usb_interface *intf) 1897 { 1898 struct usbnet *dev = usb_get_intfdata(intf); 1899 int ret; 1900 1901 ret = smsc95xx_reset(dev); 1902 if (ret < 0) 1903 return ret; 1904 1905 return smsc95xx_resume(intf); 1906 } 1907 1908 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1909 { 1910 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1911 skb->ip_summed = CHECKSUM_COMPLETE; 1912 skb_trim(skb, skb->len - 2); 1913 } 1914 1915 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1916 { 1917 /* This check is no longer done by usbnet */ 1918 if (skb->len < dev->net->hard_header_len) 1919 return 0; 1920 1921 while (skb->len > 0) { 1922 u32 header, align_count; 1923 struct sk_buff *ax_skb; 1924 unsigned char *packet; 1925 u16 size; 1926 1927 memcpy(&header, skb->data, sizeof(header)); 1928 le32_to_cpus(&header); 1929 skb_pull(skb, 4 + NET_IP_ALIGN); 1930 packet = skb->data; 1931 1932 /* get the packet length */ 1933 size = (u16)((header & RX_STS_FL_) >> 16); 1934 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1935 1936 if (unlikely(header & RX_STS_ES_)) { 1937 netif_dbg(dev, rx_err, dev->net, 1938 "Error header=0x%08x\n", header); 1939 dev->net->stats.rx_errors++; 1940 dev->net->stats.rx_dropped++; 1941 1942 if (header & RX_STS_CRC_) { 1943 dev->net->stats.rx_crc_errors++; 1944 } else { 1945 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1946 dev->net->stats.rx_frame_errors++; 1947 1948 if ((header & RX_STS_LE_) && 1949 (!(header & RX_STS_FT_))) 1950 dev->net->stats.rx_length_errors++; 1951 } 1952 } else { 1953 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1954 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1955 netif_dbg(dev, rx_err, dev->net, 1956 "size err header=0x%08x\n", header); 1957 return 0; 1958 } 1959 1960 /* last frame in this batch */ 1961 if (skb->len == size) { 1962 if (dev->net->features & NETIF_F_RXCSUM) 1963 smsc95xx_rx_csum_offload(skb); 1964 skb_trim(skb, skb->len - 4); /* remove fcs */ 1965 skb->truesize = size + sizeof(struct sk_buff); 1966 1967 return 1; 1968 } 1969 1970 ax_skb = skb_clone(skb, GFP_ATOMIC); 1971 if (unlikely(!ax_skb)) { 1972 netdev_warn(dev->net, "Error allocating skb\n"); 1973 return 0; 1974 } 1975 1976 ax_skb->len = size; 1977 ax_skb->data = packet; 1978 skb_set_tail_pointer(ax_skb, size); 1979 1980 if (dev->net->features & NETIF_F_RXCSUM) 1981 smsc95xx_rx_csum_offload(ax_skb); 1982 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1983 ax_skb->truesize = size + sizeof(struct sk_buff); 1984 1985 usbnet_skb_return(dev, ax_skb); 1986 } 1987 1988 skb_pull(skb, size); 1989 1990 /* padding bytes before the next frame starts */ 1991 if (skb->len) 1992 skb_pull(skb, align_count); 1993 } 1994 1995 return 1; 1996 } 1997 1998 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1999 { 2000 u16 low_16 = (u16)skb_checksum_start_offset(skb); 2001 u16 high_16 = low_16 + skb->csum_offset; 2002 return (high_16 << 16) | low_16; 2003 } 2004 2005 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 2006 struct sk_buff *skb, gfp_t flags) 2007 { 2008 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 2009 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 2010 u32 tx_cmd_a, tx_cmd_b; 2011 2012 /* We do not advertise SG, so skbs should be already linearized */ 2013 BUG_ON(skb_shinfo(skb)->nr_frags); 2014 2015 /* Make writable and expand header space by overhead if required */ 2016 if (skb_cow_head(skb, overhead)) { 2017 /* Must deallocate here as returning NULL to indicate error 2018 * means the skb won't be deallocated in the caller. 2019 */ 2020 dev_kfree_skb_any(skb); 2021 return NULL; 2022 } 2023 2024 if (csum) { 2025 if (skb->len <= 45) { 2026 /* workaround - hardware tx checksum does not work 2027 * properly with extremely small packets */ 2028 long csstart = skb_checksum_start_offset(skb); 2029 __wsum calc = csum_partial(skb->data + csstart, 2030 skb->len - csstart, 0); 2031 *((__sum16 *)(skb->data + csstart 2032 + skb->csum_offset)) = csum_fold(calc); 2033 2034 csum = false; 2035 } else { 2036 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 2037 skb_push(skb, 4); 2038 cpu_to_le32s(&csum_preamble); 2039 memcpy(skb->data, &csum_preamble, 4); 2040 } 2041 } 2042 2043 skb_push(skb, 4); 2044 tx_cmd_b = (u32)(skb->len - 4); 2045 if (csum) 2046 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 2047 cpu_to_le32s(&tx_cmd_b); 2048 memcpy(skb->data, &tx_cmd_b, 4); 2049 2050 skb_push(skb, 4); 2051 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ | 2052 TX_CMD_A_LAST_SEG_; 2053 cpu_to_le32s(&tx_cmd_a); 2054 memcpy(skb->data, &tx_cmd_a, 4); 2055 2056 return skb; 2057 } 2058 2059 static int smsc95xx_manage_power(struct usbnet *dev, int on) 2060 { 2061 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 2062 2063 dev->intf->needs_remote_wakeup = on; 2064 2065 if (pdata->features & FEATURE_REMOTE_WAKEUP) 2066 return 0; 2067 2068 /* this chip revision isn't capable of remote wakeup */ 2069 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 2070 2071 if (on) 2072 usb_autopm_get_interface_no_resume(dev->intf); 2073 else 2074 usb_autopm_put_interface(dev->intf); 2075 2076 return 0; 2077 } 2078 2079 static const struct driver_info smsc95xx_info = { 2080 .description = "smsc95xx USB 2.0 Ethernet", 2081 .bind = smsc95xx_bind, 2082 .unbind = smsc95xx_unbind, 2083 .link_reset = smsc95xx_link_reset, 2084 .reset = smsc95xx_reset, 2085 .rx_fixup = smsc95xx_rx_fixup, 2086 .tx_fixup = smsc95xx_tx_fixup, 2087 .status = smsc95xx_status, 2088 .manage_power = smsc95xx_manage_power, 2089 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2090 }; 2091 2092 static const struct usb_device_id products[] = { 2093 { 2094 /* SMSC9500 USB Ethernet Device */ 2095 USB_DEVICE(0x0424, 0x9500), 2096 .driver_info = (unsigned long) &smsc95xx_info, 2097 }, 2098 { 2099 /* SMSC9505 USB Ethernet Device */ 2100 USB_DEVICE(0x0424, 0x9505), 2101 .driver_info = (unsigned long) &smsc95xx_info, 2102 }, 2103 { 2104 /* SMSC9500A USB Ethernet Device */ 2105 USB_DEVICE(0x0424, 0x9E00), 2106 .driver_info = (unsigned long) &smsc95xx_info, 2107 }, 2108 { 2109 /* SMSC9505A USB Ethernet Device */ 2110 USB_DEVICE(0x0424, 0x9E01), 2111 .driver_info = (unsigned long) &smsc95xx_info, 2112 }, 2113 { 2114 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2115 USB_DEVICE(0x0424, 0xec00), 2116 .driver_info = (unsigned long) &smsc95xx_info, 2117 }, 2118 { 2119 /* SMSC9500 USB Ethernet Device (SAL10) */ 2120 USB_DEVICE(0x0424, 0x9900), 2121 .driver_info = (unsigned long) &smsc95xx_info, 2122 }, 2123 { 2124 /* SMSC9505 USB Ethernet Device (SAL10) */ 2125 USB_DEVICE(0x0424, 0x9901), 2126 .driver_info = (unsigned long) &smsc95xx_info, 2127 }, 2128 { 2129 /* SMSC9500A USB Ethernet Device (SAL10) */ 2130 USB_DEVICE(0x0424, 0x9902), 2131 .driver_info = (unsigned long) &smsc95xx_info, 2132 }, 2133 { 2134 /* SMSC9505A USB Ethernet Device (SAL10) */ 2135 USB_DEVICE(0x0424, 0x9903), 2136 .driver_info = (unsigned long) &smsc95xx_info, 2137 }, 2138 { 2139 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2140 USB_DEVICE(0x0424, 0x9904), 2141 .driver_info = (unsigned long) &smsc95xx_info, 2142 }, 2143 { 2144 /* SMSC9500A USB Ethernet Device (HAL) */ 2145 USB_DEVICE(0x0424, 0x9905), 2146 .driver_info = (unsigned long) &smsc95xx_info, 2147 }, 2148 { 2149 /* SMSC9505A USB Ethernet Device (HAL) */ 2150 USB_DEVICE(0x0424, 0x9906), 2151 .driver_info = (unsigned long) &smsc95xx_info, 2152 }, 2153 { 2154 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2155 USB_DEVICE(0x0424, 0x9907), 2156 .driver_info = (unsigned long) &smsc95xx_info, 2157 }, 2158 { 2159 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2160 USB_DEVICE(0x0424, 0x9908), 2161 .driver_info = (unsigned long) &smsc95xx_info, 2162 }, 2163 { 2164 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2165 USB_DEVICE(0x0424, 0x9909), 2166 .driver_info = (unsigned long) &smsc95xx_info, 2167 }, 2168 { 2169 /* SMSC LAN9530 USB Ethernet Device */ 2170 USB_DEVICE(0x0424, 0x9530), 2171 .driver_info = (unsigned long) &smsc95xx_info, 2172 }, 2173 { 2174 /* SMSC LAN9730 USB Ethernet Device */ 2175 USB_DEVICE(0x0424, 0x9730), 2176 .driver_info = (unsigned long) &smsc95xx_info, 2177 }, 2178 { 2179 /* SMSC LAN89530 USB Ethernet Device */ 2180 USB_DEVICE(0x0424, 0x9E08), 2181 .driver_info = (unsigned long) &smsc95xx_info, 2182 }, 2183 { }, /* END */ 2184 }; 2185 MODULE_DEVICE_TABLE(usb, products); 2186 2187 static struct usb_driver smsc95xx_driver = { 2188 .name = "smsc95xx", 2189 .id_table = products, 2190 .probe = usbnet_probe, 2191 .suspend = smsc95xx_suspend, 2192 .resume = smsc95xx_resume, 2193 .reset_resume = smsc95xx_reset_resume, 2194 .disconnect = usbnet_disconnect, 2195 .disable_hub_initiated_lpm = 1, 2196 .supports_autosuspend = 1, 2197 }; 2198 2199 module_usb_driver(smsc95xx_driver); 2200 2201 MODULE_AUTHOR("Nancy Lin"); 2202 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2203 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2204 MODULE_LICENSE("GPL"); 2205