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 "1.0.5" 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, afc_cfg = 0; 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 else 541 flow = 0; 542 543 if (cap & FLOW_CTRL_TX) 544 afc_cfg |= 0xF; 545 else 546 afc_cfg &= ~0xF; 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 flow = 0; 554 afc_cfg |= 0xF; 555 } 556 557 ret = smsc95xx_write_reg(dev, FLOW, flow); 558 if (ret < 0) 559 return ret; 560 561 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); 562 } 563 564 static int smsc95xx_link_reset(struct usbnet *dev) 565 { 566 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 567 struct mii_if_info *mii = &dev->mii; 568 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; 569 unsigned long flags; 570 u16 lcladv, rmtadv; 571 int ret; 572 573 /* clear interrupt status */ 574 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC); 575 if (ret < 0) 576 return ret; 577 578 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 579 if (ret < 0) 580 return ret; 581 582 mii_check_media(mii, 1, 1); 583 mii_ethtool_gset(&dev->mii, &ecmd); 584 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE); 585 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA); 586 587 netif_dbg(dev, link, dev->net, 588 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n", 589 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv); 590 591 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 592 if (ecmd.duplex != DUPLEX_FULL) { 593 pdata->mac_cr &= ~MAC_CR_FDPX_; 594 pdata->mac_cr |= MAC_CR_RCVOWN_; 595 } else { 596 pdata->mac_cr &= ~MAC_CR_RCVOWN_; 597 pdata->mac_cr |= MAC_CR_FDPX_; 598 } 599 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 600 601 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 602 if (ret < 0) 603 return ret; 604 605 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv); 606 if (ret < 0) 607 netdev_warn(dev->net, "Error updating PHY flow control\n"); 608 609 return ret; 610 } 611 612 static void smsc95xx_status(struct usbnet *dev, struct urb *urb) 613 { 614 u32 intdata; 615 616 if (urb->actual_length != 4) { 617 netdev_warn(dev->net, "unexpected urb length %d\n", 618 urb->actual_length); 619 return; 620 } 621 622 memcpy(&intdata, urb->transfer_buffer, 4); 623 le32_to_cpus(&intdata); 624 625 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 626 627 if (intdata & INT_ENP_PHY_INT_) 628 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 629 else 630 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 631 intdata); 632 } 633 634 static void set_carrier(struct usbnet *dev, bool link) 635 { 636 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 637 638 if (pdata->link_ok == link) 639 return; 640 641 pdata->link_ok = link; 642 643 if (link) 644 usbnet_link_change(dev, 1, 0); 645 else 646 usbnet_link_change(dev, 0, 0); 647 } 648 649 static void check_carrier(struct work_struct *work) 650 { 651 struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv, 652 carrier_check.work); 653 struct usbnet *dev = pdata->dev; 654 int ret; 655 656 if (pdata->suspend_flags != 0) 657 return; 658 659 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR); 660 if (ret < 0) { 661 netdev_warn(dev->net, "Failed to read MII_BMSR\n"); 662 return; 663 } 664 if (ret & BMSR_LSTATUS) 665 set_carrier(dev, 1); 666 else 667 set_carrier(dev, 0); 668 669 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 670 } 671 672 /* Enable or disable Tx & Rx checksum offload engines */ 673 static int smsc95xx_set_features(struct net_device *netdev, 674 netdev_features_t features) 675 { 676 struct usbnet *dev = netdev_priv(netdev); 677 u32 read_buf; 678 int ret; 679 680 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 681 if (ret < 0) 682 return ret; 683 684 if (features & NETIF_F_HW_CSUM) 685 read_buf |= Tx_COE_EN_; 686 else 687 read_buf &= ~Tx_COE_EN_; 688 689 if (features & NETIF_F_RXCSUM) 690 read_buf |= Rx_COE_EN_; 691 else 692 read_buf &= ~Rx_COE_EN_; 693 694 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 695 if (ret < 0) 696 return ret; 697 698 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 699 return 0; 700 } 701 702 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 703 { 704 return MAX_EEPROM_SIZE; 705 } 706 707 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 708 struct ethtool_eeprom *ee, u8 *data) 709 { 710 struct usbnet *dev = netdev_priv(netdev); 711 712 ee->magic = LAN95XX_EEPROM_MAGIC; 713 714 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 715 } 716 717 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 718 struct ethtool_eeprom *ee, u8 *data) 719 { 720 struct usbnet *dev = netdev_priv(netdev); 721 722 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 723 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 724 ee->magic); 725 return -EINVAL; 726 } 727 728 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 729 } 730 731 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 732 { 733 /* all smsc95xx registers */ 734 return COE_CR - ID_REV + sizeof(u32); 735 } 736 737 static void 738 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 739 void *buf) 740 { 741 struct usbnet *dev = netdev_priv(netdev); 742 unsigned int i, j; 743 int retval; 744 u32 *data = buf; 745 746 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 747 if (retval < 0) { 748 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 749 return; 750 } 751 752 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 753 retval = smsc95xx_read_reg(dev, i, &data[j]); 754 if (retval < 0) { 755 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 756 return; 757 } 758 } 759 } 760 761 static void smsc95xx_ethtool_get_wol(struct net_device *net, 762 struct ethtool_wolinfo *wolinfo) 763 { 764 struct usbnet *dev = netdev_priv(net); 765 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 766 767 wolinfo->supported = SUPPORTED_WAKE; 768 wolinfo->wolopts = pdata->wolopts; 769 } 770 771 static int smsc95xx_ethtool_set_wol(struct net_device *net, 772 struct ethtool_wolinfo *wolinfo) 773 { 774 struct usbnet *dev = netdev_priv(net); 775 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 776 int ret; 777 778 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 779 780 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 781 if (ret < 0) 782 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 783 784 return ret; 785 } 786 787 static int get_mdix_status(struct net_device *net) 788 { 789 struct usbnet *dev = netdev_priv(net); 790 u32 val; 791 int buf; 792 793 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS); 794 if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) { 795 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_) 796 return ETH_TP_MDI_AUTO; 797 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_) 798 return ETH_TP_MDI_X; 799 } else { 800 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val); 801 if (val & STRAP_STATUS_AMDIX_EN_) 802 return ETH_TP_MDI_AUTO; 803 } 804 805 return ETH_TP_MDI; 806 } 807 808 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl) 809 { 810 struct usbnet *dev = netdev_priv(net); 811 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 812 int buf; 813 814 if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) || 815 (pdata->chip_id == ID_REV_CHIP_ID_9530_) || 816 (pdata->chip_id == ID_REV_CHIP_ID_89530_) || 817 (pdata->chip_id == ID_REV_CHIP_ID_9730_)) { 818 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */ 819 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 820 PHY_EDPD_CONFIG); 821 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_; 822 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 823 PHY_EDPD_CONFIG, buf); 824 } 825 826 if (mdix_ctrl == ETH_TP_MDI) { 827 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 828 SPECIAL_CTRL_STS); 829 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_; 830 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 831 SPECIAL_CTRL_STS_AMDIX_STATE_); 832 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 833 SPECIAL_CTRL_STS, buf); 834 } else if (mdix_ctrl == ETH_TP_MDI_X) { 835 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 836 SPECIAL_CTRL_STS); 837 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_; 838 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 839 SPECIAL_CTRL_STS_AMDIX_STATE_); 840 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_; 841 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 842 SPECIAL_CTRL_STS, buf); 843 } else if (mdix_ctrl == ETH_TP_MDI_AUTO) { 844 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, 845 SPECIAL_CTRL_STS); 846 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_; 847 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ | 848 SPECIAL_CTRL_STS_AMDIX_STATE_); 849 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_; 850 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, 851 SPECIAL_CTRL_STS, buf); 852 } 853 pdata->mdix_ctrl = mdix_ctrl; 854 } 855 856 static int smsc95xx_get_settings(struct net_device *net, 857 struct ethtool_cmd *cmd) 858 { 859 struct usbnet *dev = netdev_priv(net); 860 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 861 int retval; 862 863 retval = usbnet_get_settings(net, cmd); 864 865 cmd->eth_tp_mdix = pdata->mdix_ctrl; 866 cmd->eth_tp_mdix_ctrl = pdata->mdix_ctrl; 867 868 return retval; 869 } 870 871 static int smsc95xx_set_settings(struct net_device *net, 872 struct ethtool_cmd *cmd) 873 { 874 struct usbnet *dev = netdev_priv(net); 875 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 876 int retval; 877 878 if (pdata->mdix_ctrl != cmd->eth_tp_mdix_ctrl) 879 set_mdix_status(net, cmd->eth_tp_mdix_ctrl); 880 881 retval = usbnet_set_settings(net, cmd); 882 883 return retval; 884 } 885 886 static const struct ethtool_ops smsc95xx_ethtool_ops = { 887 .get_link = usbnet_get_link, 888 .nway_reset = usbnet_nway_reset, 889 .get_drvinfo = usbnet_get_drvinfo, 890 .get_msglevel = usbnet_get_msglevel, 891 .set_msglevel = usbnet_set_msglevel, 892 .get_settings = smsc95xx_get_settings, 893 .set_settings = smsc95xx_set_settings, 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 }; 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_set_mac_address = eth_mac_addr, 1252 .ndo_validate_addr = eth_validate_addr, 1253 .ndo_do_ioctl = smsc95xx_ioctl, 1254 .ndo_set_rx_mode = smsc95xx_set_multicast, 1255 .ndo_set_features = smsc95xx_set_features, 1256 }; 1257 1258 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1259 { 1260 struct smsc95xx_priv *pdata = NULL; 1261 u32 val; 1262 int ret; 1263 1264 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1265 1266 ret = usbnet_get_endpoints(dev, intf); 1267 if (ret < 0) { 1268 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1269 return ret; 1270 } 1271 1272 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv), 1273 GFP_KERNEL); 1274 1275 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1276 if (!pdata) 1277 return -ENOMEM; 1278 1279 spin_lock_init(&pdata->mac_cr_lock); 1280 1281 if (DEFAULT_TX_CSUM_ENABLE) 1282 dev->net->features |= NETIF_F_HW_CSUM; 1283 if (DEFAULT_RX_CSUM_ENABLE) 1284 dev->net->features |= NETIF_F_RXCSUM; 1285 1286 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM; 1287 1288 smsc95xx_init_mac_address(dev); 1289 1290 /* Init all registers */ 1291 ret = smsc95xx_reset(dev); 1292 1293 /* detect device revision as different features may be available */ 1294 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1295 if (ret < 0) 1296 return ret; 1297 val >>= 16; 1298 pdata->chip_id = val; 1299 pdata->mdix_ctrl = get_mdix_status(dev->net); 1300 1301 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1302 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1303 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1304 FEATURE_PHY_NLP_CROSSOVER | 1305 FEATURE_REMOTE_WAKEUP); 1306 else if (val == ID_REV_CHIP_ID_9512_) 1307 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1308 1309 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1310 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1311 dev->net->flags |= IFF_MULTICAST; 1312 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1313 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1314 1315 pdata->dev = dev; 1316 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier); 1317 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1318 1319 return 0; 1320 } 1321 1322 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1323 { 1324 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1325 1326 if (pdata) { 1327 cancel_delayed_work(&pdata->carrier_check); 1328 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1329 kfree(pdata); 1330 pdata = NULL; 1331 dev->data[0] = 0; 1332 } 1333 } 1334 1335 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1336 { 1337 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1338 return crc << ((filter % 2) * 16); 1339 } 1340 1341 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1342 { 1343 struct mii_if_info *mii = &dev->mii; 1344 int ret; 1345 1346 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1347 1348 /* read to clear */ 1349 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC); 1350 if (ret < 0) 1351 return ret; 1352 1353 /* enable interrupt source */ 1354 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK); 1355 if (ret < 0) 1356 return ret; 1357 1358 ret |= mask; 1359 1360 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret); 1361 1362 return 0; 1363 } 1364 1365 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1366 { 1367 struct mii_if_info *mii = &dev->mii; 1368 int ret; 1369 1370 /* first, a dummy read, needed to latch some MII phys */ 1371 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1372 if (ret < 0) 1373 return ret; 1374 1375 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1376 if (ret < 0) 1377 return ret; 1378 1379 return !!(ret & BMSR_LSTATUS); 1380 } 1381 1382 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1383 { 1384 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1385 u32 val; 1386 int ret; 1387 1388 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1389 if (ret < 0) 1390 return ret; 1391 1392 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1393 val |= PM_CTL_SUS_MODE_0; 1394 1395 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1396 if (ret < 0) 1397 return ret; 1398 1399 /* clear wol status */ 1400 val &= ~PM_CTL_WUPS_; 1401 val |= PM_CTL_WUPS_WOL_; 1402 1403 /* enable energy detection */ 1404 if (pdata->wolopts & WAKE_PHY) 1405 val |= PM_CTL_WUPS_ED_; 1406 1407 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1408 if (ret < 0) 1409 return ret; 1410 1411 /* read back PM_CTRL */ 1412 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1413 if (ret < 0) 1414 return ret; 1415 1416 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1417 1418 return 0; 1419 } 1420 1421 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1422 { 1423 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1424 struct mii_if_info *mii = &dev->mii; 1425 u32 val; 1426 int ret; 1427 1428 /* reconfigure link pulse detection timing for 1429 * compatibility with non-standard link partners 1430 */ 1431 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1432 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG, 1433 PHY_EDPD_CONFIG_DEFAULT); 1434 1435 /* enable energy detect power-down mode */ 1436 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS); 1437 if (ret < 0) 1438 return ret; 1439 1440 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1441 1442 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret); 1443 1444 /* enter SUSPEND1 mode */ 1445 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1446 if (ret < 0) 1447 return ret; 1448 1449 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1450 val |= PM_CTL_SUS_MODE_1; 1451 1452 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1453 if (ret < 0) 1454 return ret; 1455 1456 /* clear wol status, enable energy detection */ 1457 val &= ~PM_CTL_WUPS_; 1458 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1459 1460 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1461 if (ret < 0) 1462 return ret; 1463 1464 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1465 1466 return 0; 1467 } 1468 1469 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1470 { 1471 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1472 u32 val; 1473 int ret; 1474 1475 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1476 if (ret < 0) 1477 return ret; 1478 1479 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1480 val |= PM_CTL_SUS_MODE_2; 1481 1482 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1483 if (ret < 0) 1484 return ret; 1485 1486 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1487 1488 return 0; 1489 } 1490 1491 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1492 { 1493 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1494 u32 val; 1495 int ret; 1496 1497 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1498 if (ret < 0) 1499 return ret; 1500 1501 if (val & 0xFFFF) { 1502 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1503 return -EBUSY; 1504 } 1505 1506 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1507 if (ret < 0) 1508 return ret; 1509 1510 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1511 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1512 1513 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1514 if (ret < 0) 1515 return ret; 1516 1517 /* clear wol status */ 1518 val &= ~PM_CTL_WUPS_; 1519 val |= PM_CTL_WUPS_WOL_; 1520 1521 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1522 if (ret < 0) 1523 return ret; 1524 1525 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1526 1527 return 0; 1528 } 1529 1530 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1531 { 1532 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1533 int ret; 1534 1535 if (!netif_running(dev->net)) { 1536 /* interface is ifconfig down so fully power down hw */ 1537 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1538 return smsc95xx_enter_suspend2(dev); 1539 } 1540 1541 if (!link_up) { 1542 /* link is down so enter EDPD mode, but only if device can 1543 * reliably resume from it. This check should be redundant 1544 * as current FEATURE_REMOTE_WAKEUP parts also support 1545 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1546 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1547 netdev_warn(dev->net, "EDPD not supported\n"); 1548 return -EBUSY; 1549 } 1550 1551 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1552 1553 /* enable PHY wakeup events for if cable is attached */ 1554 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1555 PHY_INT_MASK_ANEG_COMP_); 1556 if (ret < 0) { 1557 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1558 return ret; 1559 } 1560 1561 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1562 return smsc95xx_enter_suspend1(dev); 1563 } 1564 1565 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1566 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1567 PHY_INT_MASK_LINK_DOWN_); 1568 if (ret < 0) { 1569 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1570 return ret; 1571 } 1572 1573 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1574 return smsc95xx_enter_suspend3(dev); 1575 } 1576 1577 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1578 { 1579 struct usbnet *dev = usb_get_intfdata(intf); 1580 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1581 u32 val, link_up; 1582 int ret; 1583 1584 ret = usbnet_suspend(intf, message); 1585 if (ret < 0) { 1586 netdev_warn(dev->net, "usbnet_suspend error\n"); 1587 return ret; 1588 } 1589 1590 if (pdata->suspend_flags) { 1591 netdev_warn(dev->net, "error during last resume\n"); 1592 pdata->suspend_flags = 0; 1593 } 1594 1595 /* determine if link is up using only _nopm functions */ 1596 link_up = smsc95xx_link_ok_nopm(dev); 1597 1598 if (message.event == PM_EVENT_AUTO_SUSPEND && 1599 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1600 ret = smsc95xx_autosuspend(dev, link_up); 1601 goto done; 1602 } 1603 1604 /* if we get this far we're not autosuspending */ 1605 /* if no wol options set, or if link is down and we're not waking on 1606 * PHY activity, enter lowest power SUSPEND2 mode 1607 */ 1608 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1609 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1610 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1611 1612 /* disable energy detect (link up) & wake up events */ 1613 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1614 if (ret < 0) 1615 goto done; 1616 1617 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1618 1619 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1620 if (ret < 0) 1621 goto done; 1622 1623 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1624 if (ret < 0) 1625 goto done; 1626 1627 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1628 1629 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1630 if (ret < 0) 1631 goto done; 1632 1633 ret = smsc95xx_enter_suspend2(dev); 1634 goto done; 1635 } 1636 1637 if (pdata->wolopts & WAKE_PHY) { 1638 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1639 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1640 if (ret < 0) { 1641 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1642 goto done; 1643 } 1644 1645 /* if link is down then configure EDPD and enter SUSPEND1, 1646 * otherwise enter SUSPEND0 below 1647 */ 1648 if (!link_up) { 1649 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1650 ret = smsc95xx_enter_suspend1(dev); 1651 goto done; 1652 } 1653 } 1654 1655 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1656 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL); 1657 u32 command[2]; 1658 u32 offset[2]; 1659 u32 crc[4]; 1660 int wuff_filter_count = 1661 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1662 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1663 int i, filter = 0; 1664 1665 if (!filter_mask) { 1666 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1667 ret = -ENOMEM; 1668 goto done; 1669 } 1670 1671 memset(command, 0, sizeof(command)); 1672 memset(offset, 0, sizeof(offset)); 1673 memset(crc, 0, sizeof(crc)); 1674 1675 if (pdata->wolopts & WAKE_BCAST) { 1676 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1677 netdev_info(dev->net, "enabling broadcast detection\n"); 1678 filter_mask[filter * 4] = 0x003F; 1679 filter_mask[filter * 4 + 1] = 0x00; 1680 filter_mask[filter * 4 + 2] = 0x00; 1681 filter_mask[filter * 4 + 3] = 0x00; 1682 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1683 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1684 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1685 filter++; 1686 } 1687 1688 if (pdata->wolopts & WAKE_MCAST) { 1689 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1690 netdev_info(dev->net, "enabling multicast detection\n"); 1691 filter_mask[filter * 4] = 0x0007; 1692 filter_mask[filter * 4 + 1] = 0x00; 1693 filter_mask[filter * 4 + 2] = 0x00; 1694 filter_mask[filter * 4 + 3] = 0x00; 1695 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1696 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1697 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1698 filter++; 1699 } 1700 1701 if (pdata->wolopts & WAKE_ARP) { 1702 const u8 arp[] = {0x08, 0x06}; 1703 netdev_info(dev->net, "enabling ARP detection\n"); 1704 filter_mask[filter * 4] = 0x0003; 1705 filter_mask[filter * 4 + 1] = 0x00; 1706 filter_mask[filter * 4 + 2] = 0x00; 1707 filter_mask[filter * 4 + 3] = 0x00; 1708 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1709 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1710 crc[filter/2] |= smsc_crc(arp, 2, filter); 1711 filter++; 1712 } 1713 1714 if (pdata->wolopts & WAKE_UCAST) { 1715 netdev_info(dev->net, "enabling unicast detection\n"); 1716 filter_mask[filter * 4] = 0x003F; 1717 filter_mask[filter * 4 + 1] = 0x00; 1718 filter_mask[filter * 4 + 2] = 0x00; 1719 filter_mask[filter * 4 + 3] = 0x00; 1720 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1721 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1722 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1723 filter++; 1724 } 1725 1726 for (i = 0; i < (wuff_filter_count * 4); i++) { 1727 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1728 if (ret < 0) { 1729 kfree(filter_mask); 1730 goto done; 1731 } 1732 } 1733 kfree(filter_mask); 1734 1735 for (i = 0; i < (wuff_filter_count / 4); i++) { 1736 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1737 if (ret < 0) 1738 goto done; 1739 } 1740 1741 for (i = 0; i < (wuff_filter_count / 4); i++) { 1742 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1743 if (ret < 0) 1744 goto done; 1745 } 1746 1747 for (i = 0; i < (wuff_filter_count / 2); i++) { 1748 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1749 if (ret < 0) 1750 goto done; 1751 } 1752 1753 /* clear any pending pattern match packet status */ 1754 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1755 if (ret < 0) 1756 goto done; 1757 1758 val |= WUCSR_WUFR_; 1759 1760 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1761 if (ret < 0) 1762 goto done; 1763 } 1764 1765 if (pdata->wolopts & WAKE_MAGIC) { 1766 /* clear any pending magic packet status */ 1767 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1768 if (ret < 0) 1769 goto done; 1770 1771 val |= WUCSR_MPR_; 1772 1773 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1774 if (ret < 0) 1775 goto done; 1776 } 1777 1778 /* enable/disable wakeup sources */ 1779 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1780 if (ret < 0) 1781 goto done; 1782 1783 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1784 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1785 val |= WUCSR_WAKE_EN_; 1786 } else { 1787 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1788 val &= ~WUCSR_WAKE_EN_; 1789 } 1790 1791 if (pdata->wolopts & WAKE_MAGIC) { 1792 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1793 val |= WUCSR_MPEN_; 1794 } else { 1795 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1796 val &= ~WUCSR_MPEN_; 1797 } 1798 1799 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1800 if (ret < 0) 1801 goto done; 1802 1803 /* enable wol wakeup source */ 1804 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1805 if (ret < 0) 1806 goto done; 1807 1808 val |= PM_CTL_WOL_EN_; 1809 1810 /* phy energy detect wakeup source */ 1811 if (pdata->wolopts & WAKE_PHY) 1812 val |= PM_CTL_ED_EN_; 1813 1814 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1815 if (ret < 0) 1816 goto done; 1817 1818 /* enable receiver to enable frame reception */ 1819 smsc95xx_start_rx_path(dev, 1); 1820 1821 /* some wol options are enabled, so enter SUSPEND0 */ 1822 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1823 ret = smsc95xx_enter_suspend0(dev); 1824 1825 done: 1826 /* 1827 * TODO: resume() might need to handle the suspend failure 1828 * in system sleep 1829 */ 1830 if (ret && PMSG_IS_AUTO(message)) 1831 usbnet_resume(intf); 1832 return ret; 1833 } 1834 1835 static int smsc95xx_resume(struct usb_interface *intf) 1836 { 1837 struct usbnet *dev = usb_get_intfdata(intf); 1838 struct smsc95xx_priv *pdata; 1839 u8 suspend_flags; 1840 int ret; 1841 u32 val; 1842 1843 BUG_ON(!dev); 1844 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1845 suspend_flags = pdata->suspend_flags; 1846 1847 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1848 1849 /* do this first to ensure it's cleared even in error case */ 1850 pdata->suspend_flags = 0; 1851 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1852 1853 if (suspend_flags & SUSPEND_ALLMODES) { 1854 /* clear wake-up sources */ 1855 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1856 if (ret < 0) 1857 return ret; 1858 1859 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1860 1861 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1862 if (ret < 0) 1863 return ret; 1864 1865 /* clear wake-up status */ 1866 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1867 if (ret < 0) 1868 return ret; 1869 1870 val &= ~PM_CTL_WOL_EN_; 1871 val |= PM_CTL_WUPS_; 1872 1873 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1874 if (ret < 0) 1875 return ret; 1876 } 1877 1878 ret = usbnet_resume(intf); 1879 if (ret < 0) 1880 netdev_warn(dev->net, "usbnet_resume error\n"); 1881 1882 return ret; 1883 } 1884 1885 static int smsc95xx_reset_resume(struct usb_interface *intf) 1886 { 1887 struct usbnet *dev = usb_get_intfdata(intf); 1888 int ret; 1889 1890 ret = smsc95xx_reset(dev); 1891 if (ret < 0) 1892 return ret; 1893 1894 return smsc95xx_resume(intf); 1895 } 1896 1897 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1898 { 1899 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1900 skb->ip_summed = CHECKSUM_COMPLETE; 1901 skb_trim(skb, skb->len - 2); 1902 } 1903 1904 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1905 { 1906 /* This check is no longer done by usbnet */ 1907 if (skb->len < dev->net->hard_header_len) 1908 return 0; 1909 1910 while (skb->len > 0) { 1911 u32 header, align_count; 1912 struct sk_buff *ax_skb; 1913 unsigned char *packet; 1914 u16 size; 1915 1916 memcpy(&header, skb->data, sizeof(header)); 1917 le32_to_cpus(&header); 1918 skb_pull(skb, 4 + NET_IP_ALIGN); 1919 packet = skb->data; 1920 1921 /* get the packet length */ 1922 size = (u16)((header & RX_STS_FL_) >> 16); 1923 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1924 1925 if (unlikely(header & RX_STS_ES_)) { 1926 netif_dbg(dev, rx_err, dev->net, 1927 "Error header=0x%08x\n", header); 1928 dev->net->stats.rx_errors++; 1929 dev->net->stats.rx_dropped++; 1930 1931 if (header & RX_STS_CRC_) { 1932 dev->net->stats.rx_crc_errors++; 1933 } else { 1934 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1935 dev->net->stats.rx_frame_errors++; 1936 1937 if ((header & RX_STS_LE_) && 1938 (!(header & RX_STS_FT_))) 1939 dev->net->stats.rx_length_errors++; 1940 } 1941 } else { 1942 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1943 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1944 netif_dbg(dev, rx_err, dev->net, 1945 "size err header=0x%08x\n", header); 1946 return 0; 1947 } 1948 1949 /* last frame in this batch */ 1950 if (skb->len == size) { 1951 if (dev->net->features & NETIF_F_RXCSUM) 1952 smsc95xx_rx_csum_offload(skb); 1953 skb_trim(skb, skb->len - 4); /* remove fcs */ 1954 skb->truesize = size + sizeof(struct sk_buff); 1955 1956 return 1; 1957 } 1958 1959 ax_skb = skb_clone(skb, GFP_ATOMIC); 1960 if (unlikely(!ax_skb)) { 1961 netdev_warn(dev->net, "Error allocating skb\n"); 1962 return 0; 1963 } 1964 1965 ax_skb->len = size; 1966 ax_skb->data = packet; 1967 skb_set_tail_pointer(ax_skb, size); 1968 1969 if (dev->net->features & NETIF_F_RXCSUM) 1970 smsc95xx_rx_csum_offload(ax_skb); 1971 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1972 ax_skb->truesize = size + sizeof(struct sk_buff); 1973 1974 usbnet_skb_return(dev, ax_skb); 1975 } 1976 1977 skb_pull(skb, size); 1978 1979 /* padding bytes before the next frame starts */ 1980 if (skb->len) 1981 skb_pull(skb, align_count); 1982 } 1983 1984 return 1; 1985 } 1986 1987 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 1988 { 1989 u16 low_16 = (u16)skb_checksum_start_offset(skb); 1990 u16 high_16 = low_16 + skb->csum_offset; 1991 return (high_16 << 16) | low_16; 1992 } 1993 1994 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 1995 struct sk_buff *skb, gfp_t flags) 1996 { 1997 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 1998 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 1999 u32 tx_cmd_a, tx_cmd_b; 2000 2001 /* We do not advertise SG, so skbs should be already linearized */ 2002 BUG_ON(skb_shinfo(skb)->nr_frags); 2003 2004 if (skb_headroom(skb) < overhead) { 2005 struct sk_buff *skb2 = skb_copy_expand(skb, 2006 overhead, 0, flags); 2007 dev_kfree_skb_any(skb); 2008 skb = skb2; 2009 if (!skb) 2010 return NULL; 2011 } 2012 2013 if (csum) { 2014 if (skb->len <= 45) { 2015 /* workaround - hardware tx checksum does not work 2016 * properly with extremely small packets */ 2017 long csstart = skb_checksum_start_offset(skb); 2018 __wsum calc = csum_partial(skb->data + csstart, 2019 skb->len - csstart, 0); 2020 *((__sum16 *)(skb->data + csstart 2021 + skb->csum_offset)) = csum_fold(calc); 2022 2023 csum = false; 2024 } else { 2025 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 2026 skb_push(skb, 4); 2027 cpu_to_le32s(&csum_preamble); 2028 memcpy(skb->data, &csum_preamble, 4); 2029 } 2030 } 2031 2032 skb_push(skb, 4); 2033 tx_cmd_b = (u32)(skb->len - 4); 2034 if (csum) 2035 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 2036 cpu_to_le32s(&tx_cmd_b); 2037 memcpy(skb->data, &tx_cmd_b, 4); 2038 2039 skb_push(skb, 4); 2040 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ | 2041 TX_CMD_A_LAST_SEG_; 2042 cpu_to_le32s(&tx_cmd_a); 2043 memcpy(skb->data, &tx_cmd_a, 4); 2044 2045 return skb; 2046 } 2047 2048 static int smsc95xx_manage_power(struct usbnet *dev, int on) 2049 { 2050 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 2051 2052 dev->intf->needs_remote_wakeup = on; 2053 2054 if (pdata->features & FEATURE_REMOTE_WAKEUP) 2055 return 0; 2056 2057 /* this chip revision isn't capable of remote wakeup */ 2058 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 2059 2060 if (on) 2061 usb_autopm_get_interface_no_resume(dev->intf); 2062 else 2063 usb_autopm_put_interface(dev->intf); 2064 2065 return 0; 2066 } 2067 2068 static const struct driver_info smsc95xx_info = { 2069 .description = "smsc95xx USB 2.0 Ethernet", 2070 .bind = smsc95xx_bind, 2071 .unbind = smsc95xx_unbind, 2072 .link_reset = smsc95xx_link_reset, 2073 .reset = smsc95xx_reset, 2074 .rx_fixup = smsc95xx_rx_fixup, 2075 .tx_fixup = smsc95xx_tx_fixup, 2076 .status = smsc95xx_status, 2077 .manage_power = smsc95xx_manage_power, 2078 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2079 }; 2080 2081 static const struct usb_device_id products[] = { 2082 { 2083 /* SMSC9500 USB Ethernet Device */ 2084 USB_DEVICE(0x0424, 0x9500), 2085 .driver_info = (unsigned long) &smsc95xx_info, 2086 }, 2087 { 2088 /* SMSC9505 USB Ethernet Device */ 2089 USB_DEVICE(0x0424, 0x9505), 2090 .driver_info = (unsigned long) &smsc95xx_info, 2091 }, 2092 { 2093 /* SMSC9500A USB Ethernet Device */ 2094 USB_DEVICE(0x0424, 0x9E00), 2095 .driver_info = (unsigned long) &smsc95xx_info, 2096 }, 2097 { 2098 /* SMSC9505A USB Ethernet Device */ 2099 USB_DEVICE(0x0424, 0x9E01), 2100 .driver_info = (unsigned long) &smsc95xx_info, 2101 }, 2102 { 2103 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2104 USB_DEVICE(0x0424, 0xec00), 2105 .driver_info = (unsigned long) &smsc95xx_info, 2106 }, 2107 { 2108 /* SMSC9500 USB Ethernet Device (SAL10) */ 2109 USB_DEVICE(0x0424, 0x9900), 2110 .driver_info = (unsigned long) &smsc95xx_info, 2111 }, 2112 { 2113 /* SMSC9505 USB Ethernet Device (SAL10) */ 2114 USB_DEVICE(0x0424, 0x9901), 2115 .driver_info = (unsigned long) &smsc95xx_info, 2116 }, 2117 { 2118 /* SMSC9500A USB Ethernet Device (SAL10) */ 2119 USB_DEVICE(0x0424, 0x9902), 2120 .driver_info = (unsigned long) &smsc95xx_info, 2121 }, 2122 { 2123 /* SMSC9505A USB Ethernet Device (SAL10) */ 2124 USB_DEVICE(0x0424, 0x9903), 2125 .driver_info = (unsigned long) &smsc95xx_info, 2126 }, 2127 { 2128 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2129 USB_DEVICE(0x0424, 0x9904), 2130 .driver_info = (unsigned long) &smsc95xx_info, 2131 }, 2132 { 2133 /* SMSC9500A USB Ethernet Device (HAL) */ 2134 USB_DEVICE(0x0424, 0x9905), 2135 .driver_info = (unsigned long) &smsc95xx_info, 2136 }, 2137 { 2138 /* SMSC9505A USB Ethernet Device (HAL) */ 2139 USB_DEVICE(0x0424, 0x9906), 2140 .driver_info = (unsigned long) &smsc95xx_info, 2141 }, 2142 { 2143 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2144 USB_DEVICE(0x0424, 0x9907), 2145 .driver_info = (unsigned long) &smsc95xx_info, 2146 }, 2147 { 2148 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2149 USB_DEVICE(0x0424, 0x9908), 2150 .driver_info = (unsigned long) &smsc95xx_info, 2151 }, 2152 { 2153 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2154 USB_DEVICE(0x0424, 0x9909), 2155 .driver_info = (unsigned long) &smsc95xx_info, 2156 }, 2157 { 2158 /* SMSC LAN9530 USB Ethernet Device */ 2159 USB_DEVICE(0x0424, 0x9530), 2160 .driver_info = (unsigned long) &smsc95xx_info, 2161 }, 2162 { 2163 /* SMSC LAN9730 USB Ethernet Device */ 2164 USB_DEVICE(0x0424, 0x9730), 2165 .driver_info = (unsigned long) &smsc95xx_info, 2166 }, 2167 { 2168 /* SMSC LAN89530 USB Ethernet Device */ 2169 USB_DEVICE(0x0424, 0x9E08), 2170 .driver_info = (unsigned long) &smsc95xx_info, 2171 }, 2172 { }, /* END */ 2173 }; 2174 MODULE_DEVICE_TABLE(usb, products); 2175 2176 static struct usb_driver smsc95xx_driver = { 2177 .name = "smsc95xx", 2178 .id_table = products, 2179 .probe = usbnet_probe, 2180 .suspend = smsc95xx_suspend, 2181 .resume = smsc95xx_resume, 2182 .reset_resume = smsc95xx_reset_resume, 2183 .disconnect = usbnet_disconnect, 2184 .disable_hub_initiated_lpm = 1, 2185 .supports_autosuspend = 1, 2186 }; 2187 2188 module_usb_driver(smsc95xx_driver); 2189 2190 MODULE_AUTHOR("Nancy Lin"); 2191 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2192 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2193 MODULE_LICENSE("GPL"); 2194