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 intdata = get_unaligned_le32(urb->transfer_buffer); 622 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 623 624 if (intdata & INT_ENP_PHY_INT_) 625 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 626 else 627 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 628 intdata); 629 } 630 631 static void set_carrier(struct usbnet *dev, bool link) 632 { 633 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 634 635 if (pdata->link_ok == link) 636 return; 637 638 pdata->link_ok = link; 639 640 if (link) 641 usbnet_link_change(dev, 1, 0); 642 else 643 usbnet_link_change(dev, 0, 0); 644 } 645 646 static void check_carrier(struct work_struct *work) 647 { 648 struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv, 649 carrier_check.work); 650 struct usbnet *dev = pdata->dev; 651 int ret; 652 653 if (pdata->suspend_flags != 0) 654 return; 655 656 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR); 657 if (ret < 0) { 658 netdev_warn(dev->net, "Failed to read MII_BMSR\n"); 659 return; 660 } 661 if (ret & BMSR_LSTATUS) 662 set_carrier(dev, 1); 663 else 664 set_carrier(dev, 0); 665 666 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 667 } 668 669 /* Enable or disable Tx & Rx checksum offload engines */ 670 static int smsc95xx_set_features(struct net_device *netdev, 671 netdev_features_t features) 672 { 673 struct usbnet *dev = netdev_priv(netdev); 674 u32 read_buf; 675 int ret; 676 677 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); 678 if (ret < 0) 679 return ret; 680 681 if (features & NETIF_F_IP_CSUM) 682 read_buf |= Tx_COE_EN_; 683 else 684 read_buf &= ~Tx_COE_EN_; 685 686 if (features & NETIF_F_RXCSUM) 687 read_buf |= Rx_COE_EN_; 688 else 689 read_buf &= ~Rx_COE_EN_; 690 691 ret = smsc95xx_write_reg(dev, COE_CR, read_buf); 692 if (ret < 0) 693 return ret; 694 695 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf); 696 return 0; 697 } 698 699 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) 700 { 701 return MAX_EEPROM_SIZE; 702 } 703 704 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, 705 struct ethtool_eeprom *ee, u8 *data) 706 { 707 struct usbnet *dev = netdev_priv(netdev); 708 709 ee->magic = LAN95XX_EEPROM_MAGIC; 710 711 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); 712 } 713 714 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, 715 struct ethtool_eeprom *ee, u8 *data) 716 { 717 struct usbnet *dev = netdev_priv(netdev); 718 719 if (ee->magic != LAN95XX_EEPROM_MAGIC) { 720 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", 721 ee->magic); 722 return -EINVAL; 723 } 724 725 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); 726 } 727 728 static int smsc95xx_ethtool_getregslen(struct net_device *netdev) 729 { 730 /* all smsc95xx registers */ 731 return COE_CR - ID_REV + sizeof(u32); 732 } 733 734 static void 735 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, 736 void *buf) 737 { 738 struct usbnet *dev = netdev_priv(netdev); 739 unsigned int i, j; 740 int retval; 741 u32 *data = buf; 742 743 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); 744 if (retval < 0) { 745 netdev_warn(netdev, "REGS: cannot read ID_REV\n"); 746 return; 747 } 748 749 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { 750 retval = smsc95xx_read_reg(dev, i, &data[j]); 751 if (retval < 0) { 752 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); 753 return; 754 } 755 } 756 } 757 758 static void smsc95xx_ethtool_get_wol(struct net_device *net, 759 struct ethtool_wolinfo *wolinfo) 760 { 761 struct usbnet *dev = netdev_priv(net); 762 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 763 764 wolinfo->supported = SUPPORTED_WAKE; 765 wolinfo->wolopts = pdata->wolopts; 766 } 767 768 static int smsc95xx_ethtool_set_wol(struct net_device *net, 769 struct ethtool_wolinfo *wolinfo) 770 { 771 struct usbnet *dev = netdev_priv(net); 772 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 773 int ret; 774 775 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 776 return -EINVAL; 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_link_ksettings(struct net_device *net, 857 struct ethtool_link_ksettings *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_link_ksettings(net, cmd); 864 865 cmd->base.eth_tp_mdix = pdata->mdix_ctrl; 866 cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl; 867 868 return retval; 869 } 870 871 static int smsc95xx_set_link_ksettings(struct net_device *net, 872 const struct ethtool_link_ksettings *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->base.eth_tp_mdix_ctrl) 879 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl); 880 881 retval = usbnet_set_link_ksettings(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_eeprom_len = smsc95xx_ethtool_get_eeprom_len, 893 .get_eeprom = smsc95xx_ethtool_get_eeprom, 894 .set_eeprom = smsc95xx_ethtool_set_eeprom, 895 .get_regs_len = smsc95xx_ethtool_getregslen, 896 .get_regs = smsc95xx_ethtool_getregs, 897 .get_wol = smsc95xx_ethtool_get_wol, 898 .set_wol = smsc95xx_ethtool_set_wol, 899 .get_link_ksettings = smsc95xx_get_link_ksettings, 900 .set_link_ksettings = smsc95xx_set_link_ksettings, 901 .get_ts_info = ethtool_op_get_ts_info, 902 }; 903 904 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 905 { 906 struct usbnet *dev = netdev_priv(netdev); 907 908 if (!netif_running(netdev)) 909 return -EINVAL; 910 911 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 912 } 913 914 static void smsc95xx_init_mac_address(struct usbnet *dev) 915 { 916 const u8 *mac_addr; 917 918 /* maybe the boot loader passed the MAC address in devicetree */ 919 mac_addr = of_get_mac_address(dev->udev->dev.of_node); 920 if (mac_addr) { 921 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN); 922 return; 923 } 924 925 /* try reading mac address from EEPROM */ 926 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 927 dev->net->dev_addr) == 0) { 928 if (is_valid_ether_addr(dev->net->dev_addr)) { 929 /* eeprom values are valid so use them */ 930 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); 931 return; 932 } 933 } 934 935 /* no useful static MAC address found. generate a random one */ 936 eth_hw_addr_random(dev->net); 937 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 938 } 939 940 static int smsc95xx_set_mac_address(struct usbnet *dev) 941 { 942 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 943 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 944 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 945 int ret; 946 947 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); 948 if (ret < 0) 949 return ret; 950 951 return smsc95xx_write_reg(dev, ADDRH, addr_hi); 952 } 953 954 /* starts the TX path */ 955 static int smsc95xx_start_tx_path(struct usbnet *dev) 956 { 957 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 958 unsigned long flags; 959 int ret; 960 961 /* Enable Tx at MAC */ 962 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 963 pdata->mac_cr |= MAC_CR_TXEN_; 964 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 965 966 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); 967 if (ret < 0) 968 return ret; 969 970 /* Enable Tx at SCSRs */ 971 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); 972 } 973 974 /* Starts the Receive path */ 975 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) 976 { 977 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 978 unsigned long flags; 979 980 spin_lock_irqsave(&pdata->mac_cr_lock, flags); 981 pdata->mac_cr |= MAC_CR_RXEN_; 982 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); 983 984 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm); 985 } 986 987 static int smsc95xx_phy_initialize(struct usbnet *dev) 988 { 989 int bmcr, ret, timeout = 0; 990 991 /* Initialize MII structure */ 992 dev->mii.dev = dev->net; 993 dev->mii.mdio_read = smsc95xx_mdio_read; 994 dev->mii.mdio_write = smsc95xx_mdio_write; 995 dev->mii.phy_id_mask = 0x1f; 996 dev->mii.reg_num_mask = 0x1f; 997 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID; 998 999 /* reset phy and wait for reset to complete */ 1000 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 1001 1002 do { 1003 msleep(10); 1004 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR); 1005 timeout++; 1006 } while ((bmcr & BMCR_RESET) && (timeout < 100)); 1007 1008 if (timeout >= 100) { 1009 netdev_warn(dev->net, "timeout on PHY Reset"); 1010 return -EIO; 1011 } 1012 1013 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 1014 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | 1015 ADVERTISE_PAUSE_ASYM); 1016 1017 /* read to clear */ 1018 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); 1019 if (ret < 0) { 1020 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n"); 1021 return ret; 1022 } 1023 1024 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, 1025 PHY_INT_MASK_DEFAULT_); 1026 mii_nway_restart(&dev->mii); 1027 1028 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n"); 1029 return 0; 1030 } 1031 1032 static int smsc95xx_reset(struct usbnet *dev) 1033 { 1034 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1035 u32 read_buf, write_buf, burst_cap; 1036 int ret = 0, timeout; 1037 1038 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); 1039 1040 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); 1041 if (ret < 0) 1042 return ret; 1043 1044 timeout = 0; 1045 do { 1046 msleep(10); 1047 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1048 if (ret < 0) 1049 return ret; 1050 timeout++; 1051 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); 1052 1053 if (timeout >= 100) { 1054 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); 1055 return ret; 1056 } 1057 1058 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_); 1059 if (ret < 0) 1060 return ret; 1061 1062 timeout = 0; 1063 do { 1064 msleep(10); 1065 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); 1066 if (ret < 0) 1067 return ret; 1068 timeout++; 1069 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); 1070 1071 if (timeout >= 100) { 1072 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1073 return ret; 1074 } 1075 1076 ret = smsc95xx_set_mac_address(dev); 1077 if (ret < 0) 1078 return ret; 1079 1080 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 1081 dev->net->dev_addr); 1082 1083 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1084 if (ret < 0) 1085 return ret; 1086 1087 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 1088 read_buf); 1089 1090 read_buf |= HW_CFG_BIR_; 1091 1092 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1093 if (ret < 0) 1094 return ret; 1095 1096 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1097 if (ret < 0) 1098 return ret; 1099 1100 netif_dbg(dev, ifup, dev->net, 1101 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", 1102 read_buf); 1103 1104 if (!turbo_mode) { 1105 burst_cap = 0; 1106 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 1107 } else if (dev->udev->speed == USB_SPEED_HIGH) { 1108 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 1109 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 1110 } else { 1111 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 1112 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 1113 } 1114 1115 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 1116 (ulong)dev->rx_urb_size); 1117 1118 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); 1119 if (ret < 0) 1120 return ret; 1121 1122 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); 1123 if (ret < 0) 1124 return ret; 1125 1126 netif_dbg(dev, ifup, dev->net, 1127 "Read Value from BURST_CAP after writing: 0x%08x\n", 1128 read_buf); 1129 1130 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1131 if (ret < 0) 1132 return ret; 1133 1134 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); 1135 if (ret < 0) 1136 return ret; 1137 1138 netif_dbg(dev, ifup, dev->net, 1139 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", 1140 read_buf); 1141 1142 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1143 if (ret < 0) 1144 return ret; 1145 1146 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", 1147 read_buf); 1148 1149 if (turbo_mode) 1150 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); 1151 1152 read_buf &= ~HW_CFG_RXDOFF_; 1153 1154 /* set Rx data offset=2, Make IP header aligns on word boundary. */ 1155 read_buf |= NET_IP_ALIGN << 9; 1156 1157 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); 1158 if (ret < 0) 1159 return ret; 1160 1161 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); 1162 if (ret < 0) 1163 return ret; 1164 1165 netif_dbg(dev, ifup, dev->net, 1166 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); 1167 1168 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 1169 if (ret < 0) 1170 return ret; 1171 1172 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); 1173 if (ret < 0) 1174 return ret; 1175 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); 1176 1177 /* Configure GPIO pins as LED outputs */ 1178 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | 1179 LED_GPIO_CFG_FDX_LED; 1180 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); 1181 if (ret < 0) 1182 return ret; 1183 1184 /* Init Tx */ 1185 ret = smsc95xx_write_reg(dev, FLOW, 0); 1186 if (ret < 0) 1187 return ret; 1188 1189 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); 1190 if (ret < 0) 1191 return ret; 1192 1193 /* Don't need mac_cr_lock during initialisation */ 1194 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); 1195 if (ret < 0) 1196 return ret; 1197 1198 /* Init Rx */ 1199 /* Set Vlan */ 1200 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); 1201 if (ret < 0) 1202 return ret; 1203 1204 /* Enable or disable checksum offload engines */ 1205 ret = smsc95xx_set_features(dev->net, dev->net->features); 1206 if (ret < 0) { 1207 netdev_warn(dev->net, "Failed to set checksum offload features\n"); 1208 return ret; 1209 } 1210 1211 smsc95xx_set_multicast(dev->net); 1212 1213 ret = smsc95xx_phy_initialize(dev); 1214 if (ret < 0) { 1215 netdev_warn(dev->net, "Failed to init PHY\n"); 1216 return ret; 1217 } 1218 1219 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); 1220 if (ret < 0) 1221 return ret; 1222 1223 /* enable PHY interrupts */ 1224 read_buf |= INT_EP_CTL_PHY_INT_; 1225 1226 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); 1227 if (ret < 0) 1228 return ret; 1229 1230 ret = smsc95xx_start_tx_path(dev); 1231 if (ret < 0) { 1232 netdev_warn(dev->net, "Failed to start TX path\n"); 1233 return ret; 1234 } 1235 1236 ret = smsc95xx_start_rx_path(dev, 0); 1237 if (ret < 0) { 1238 netdev_warn(dev->net, "Failed to start RX path\n"); 1239 return ret; 1240 } 1241 1242 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); 1243 return 0; 1244 } 1245 1246 static const struct net_device_ops smsc95xx_netdev_ops = { 1247 .ndo_open = usbnet_open, 1248 .ndo_stop = usbnet_stop, 1249 .ndo_start_xmit = usbnet_start_xmit, 1250 .ndo_tx_timeout = usbnet_tx_timeout, 1251 .ndo_change_mtu = usbnet_change_mtu, 1252 .ndo_get_stats64 = usbnet_get_stats64, 1253 .ndo_set_mac_address = eth_mac_addr, 1254 .ndo_validate_addr = eth_validate_addr, 1255 .ndo_do_ioctl = smsc95xx_ioctl, 1256 .ndo_set_rx_mode = smsc95xx_set_multicast, 1257 .ndo_set_features = smsc95xx_set_features, 1258 }; 1259 1260 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) 1261 { 1262 struct smsc95xx_priv *pdata = NULL; 1263 u32 val; 1264 int ret; 1265 1266 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1267 1268 ret = usbnet_get_endpoints(dev, intf); 1269 if (ret < 0) { 1270 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1271 return ret; 1272 } 1273 1274 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv), 1275 GFP_KERNEL); 1276 1277 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1278 if (!pdata) 1279 return -ENOMEM; 1280 1281 spin_lock_init(&pdata->mac_cr_lock); 1282 1283 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. 1284 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must 1285 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, 1286 * it is transmitted as all ones. The zero transmitted checksum means 1287 * transmitter generated no checksum. Hence, enable csum offload only 1288 * for ipv4 packets. 1289 */ 1290 if (DEFAULT_TX_CSUM_ENABLE) 1291 dev->net->features |= NETIF_F_IP_CSUM; 1292 if (DEFAULT_RX_CSUM_ENABLE) 1293 dev->net->features |= NETIF_F_RXCSUM; 1294 1295 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; 1296 set_bit(EVENT_NO_IP_ALIGN, &dev->flags); 1297 1298 smsc95xx_init_mac_address(dev); 1299 1300 /* Init all registers */ 1301 ret = smsc95xx_reset(dev); 1302 1303 /* detect device revision as different features may be available */ 1304 ret = smsc95xx_read_reg(dev, ID_REV, &val); 1305 if (ret < 0) 1306 return ret; 1307 val >>= 16; 1308 pdata->chip_id = val; 1309 pdata->mdix_ctrl = get_mdix_status(dev->net); 1310 1311 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || 1312 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) 1313 pdata->features = (FEATURE_8_WAKEUP_FILTERS | 1314 FEATURE_PHY_NLP_CROSSOVER | 1315 FEATURE_REMOTE_WAKEUP); 1316 else if (val == ID_REV_CHIP_ID_9512_) 1317 pdata->features = FEATURE_8_WAKEUP_FILTERS; 1318 1319 dev->net->netdev_ops = &smsc95xx_netdev_ops; 1320 dev->net->ethtool_ops = &smsc95xx_ethtool_ops; 1321 dev->net->flags |= IFF_MULTICAST; 1322 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; 1323 dev->net->min_mtu = ETH_MIN_MTU; 1324 dev->net->max_mtu = ETH_DATA_LEN; 1325 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1326 1327 pdata->dev = dev; 1328 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier); 1329 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1330 1331 return 0; 1332 } 1333 1334 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1335 { 1336 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1337 1338 if (pdata) { 1339 cancel_delayed_work(&pdata->carrier_check); 1340 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1341 kfree(pdata); 1342 pdata = NULL; 1343 dev->data[0] = 0; 1344 } 1345 } 1346 1347 static u32 smsc_crc(const u8 *buffer, size_t len, int filter) 1348 { 1349 u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); 1350 return crc << ((filter % 2) * 16); 1351 } 1352 1353 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1354 { 1355 struct mii_if_info *mii = &dev->mii; 1356 int ret; 1357 1358 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1359 1360 /* read to clear */ 1361 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC); 1362 if (ret < 0) 1363 return ret; 1364 1365 /* enable interrupt source */ 1366 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK); 1367 if (ret < 0) 1368 return ret; 1369 1370 ret |= mask; 1371 1372 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret); 1373 1374 return 0; 1375 } 1376 1377 static int smsc95xx_link_ok_nopm(struct usbnet *dev) 1378 { 1379 struct mii_if_info *mii = &dev->mii; 1380 int ret; 1381 1382 /* first, a dummy read, needed to latch some MII phys */ 1383 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1384 if (ret < 0) 1385 return ret; 1386 1387 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1388 if (ret < 0) 1389 return ret; 1390 1391 return !!(ret & BMSR_LSTATUS); 1392 } 1393 1394 static int smsc95xx_enter_suspend0(struct usbnet *dev) 1395 { 1396 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1397 u32 val; 1398 int ret; 1399 1400 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1401 if (ret < 0) 1402 return ret; 1403 1404 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); 1405 val |= PM_CTL_SUS_MODE_0; 1406 1407 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1408 if (ret < 0) 1409 return ret; 1410 1411 /* clear wol status */ 1412 val &= ~PM_CTL_WUPS_; 1413 val |= PM_CTL_WUPS_WOL_; 1414 1415 /* enable energy detection */ 1416 if (pdata->wolopts & WAKE_PHY) 1417 val |= PM_CTL_WUPS_ED_; 1418 1419 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1420 if (ret < 0) 1421 return ret; 1422 1423 /* read back PM_CTRL */ 1424 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1425 if (ret < 0) 1426 return ret; 1427 1428 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1429 1430 return 0; 1431 } 1432 1433 static int smsc95xx_enter_suspend1(struct usbnet *dev) 1434 { 1435 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1436 struct mii_if_info *mii = &dev->mii; 1437 u32 val; 1438 int ret; 1439 1440 /* reconfigure link pulse detection timing for 1441 * compatibility with non-standard link partners 1442 */ 1443 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) 1444 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG, 1445 PHY_EDPD_CONFIG_DEFAULT); 1446 1447 /* enable energy detect power-down mode */ 1448 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS); 1449 if (ret < 0) 1450 return ret; 1451 1452 ret |= MODE_CTRL_STS_EDPWRDOWN_; 1453 1454 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret); 1455 1456 /* enter SUSPEND1 mode */ 1457 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1458 if (ret < 0) 1459 return ret; 1460 1461 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1462 val |= PM_CTL_SUS_MODE_1; 1463 1464 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1465 if (ret < 0) 1466 return ret; 1467 1468 /* clear wol status, enable energy detection */ 1469 val &= ~PM_CTL_WUPS_; 1470 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); 1471 1472 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1473 if (ret < 0) 1474 return ret; 1475 1476 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1477 1478 return 0; 1479 } 1480 1481 static int smsc95xx_enter_suspend2(struct usbnet *dev) 1482 { 1483 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1484 u32 val; 1485 int ret; 1486 1487 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1488 if (ret < 0) 1489 return ret; 1490 1491 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1492 val |= PM_CTL_SUS_MODE_2; 1493 1494 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1495 if (ret < 0) 1496 return ret; 1497 1498 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1499 1500 return 0; 1501 } 1502 1503 static int smsc95xx_enter_suspend3(struct usbnet *dev) 1504 { 1505 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1506 u32 val; 1507 int ret; 1508 1509 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val); 1510 if (ret < 0) 1511 return ret; 1512 1513 if (val & RX_FIFO_INF_USED_) { 1514 netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); 1515 return -EBUSY; 1516 } 1517 1518 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1519 if (ret < 0) 1520 return ret; 1521 1522 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); 1523 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; 1524 1525 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1526 if (ret < 0) 1527 return ret; 1528 1529 /* clear wol status */ 1530 val &= ~PM_CTL_WUPS_; 1531 val |= PM_CTL_WUPS_WOL_; 1532 1533 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1534 if (ret < 0) 1535 return ret; 1536 1537 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1538 1539 return 0; 1540 } 1541 1542 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) 1543 { 1544 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1545 int ret; 1546 1547 if (!netif_running(dev->net)) { 1548 /* interface is ifconfig down so fully power down hw */ 1549 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1550 return smsc95xx_enter_suspend2(dev); 1551 } 1552 1553 if (!link_up) { 1554 /* link is down so enter EDPD mode, but only if device can 1555 * reliably resume from it. This check should be redundant 1556 * as current FEATURE_REMOTE_WAKEUP parts also support 1557 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ 1558 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { 1559 netdev_warn(dev->net, "EDPD not supported\n"); 1560 return -EBUSY; 1561 } 1562 1563 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1564 1565 /* enable PHY wakeup events for if cable is attached */ 1566 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1567 PHY_INT_MASK_ANEG_COMP_); 1568 if (ret < 0) { 1569 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1570 return ret; 1571 } 1572 1573 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1574 return smsc95xx_enter_suspend1(dev); 1575 } 1576 1577 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1578 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1579 PHY_INT_MASK_LINK_DOWN_); 1580 if (ret < 0) { 1581 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1582 return ret; 1583 } 1584 1585 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1586 return smsc95xx_enter_suspend3(dev); 1587 } 1588 1589 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) 1590 { 1591 struct usbnet *dev = usb_get_intfdata(intf); 1592 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 1593 u32 val, link_up; 1594 int ret; 1595 1596 ret = usbnet_suspend(intf, message); 1597 if (ret < 0) { 1598 netdev_warn(dev->net, "usbnet_suspend error\n"); 1599 return ret; 1600 } 1601 1602 cancel_delayed_work_sync(&pdata->carrier_check); 1603 1604 if (pdata->suspend_flags) { 1605 netdev_warn(dev->net, "error during last resume\n"); 1606 pdata->suspend_flags = 0; 1607 } 1608 1609 /* determine if link is up using only _nopm functions */ 1610 link_up = smsc95xx_link_ok_nopm(dev); 1611 1612 if (message.event == PM_EVENT_AUTO_SUSPEND && 1613 (pdata->features & FEATURE_REMOTE_WAKEUP)) { 1614 ret = smsc95xx_autosuspend(dev, link_up); 1615 goto done; 1616 } 1617 1618 /* if we get this far we're not autosuspending */ 1619 /* if no wol options set, or if link is down and we're not waking on 1620 * PHY activity, enter lowest power SUSPEND2 mode 1621 */ 1622 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1623 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1624 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1625 1626 /* disable energy detect (link up) & wake up events */ 1627 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1628 if (ret < 0) 1629 goto done; 1630 1631 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); 1632 1633 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1634 if (ret < 0) 1635 goto done; 1636 1637 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1638 if (ret < 0) 1639 goto done; 1640 1641 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); 1642 1643 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1644 if (ret < 0) 1645 goto done; 1646 1647 ret = smsc95xx_enter_suspend2(dev); 1648 goto done; 1649 } 1650 1651 if (pdata->wolopts & WAKE_PHY) { 1652 ret = smsc95xx_enable_phy_wakeup_interrupts(dev, 1653 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_)); 1654 if (ret < 0) { 1655 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1656 goto done; 1657 } 1658 1659 /* if link is down then configure EDPD and enter SUSPEND1, 1660 * otherwise enter SUSPEND0 below 1661 */ 1662 if (!link_up) { 1663 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1664 ret = smsc95xx_enter_suspend1(dev); 1665 goto done; 1666 } 1667 } 1668 1669 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1670 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); 1671 u32 command[2]; 1672 u32 offset[2]; 1673 u32 crc[4]; 1674 int wuff_filter_count = 1675 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? 1676 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; 1677 int i, filter = 0; 1678 1679 if (!filter_mask) { 1680 netdev_warn(dev->net, "Unable to allocate filter_mask\n"); 1681 ret = -ENOMEM; 1682 goto done; 1683 } 1684 1685 memset(command, 0, sizeof(command)); 1686 memset(offset, 0, sizeof(offset)); 1687 memset(crc, 0, sizeof(crc)); 1688 1689 if (pdata->wolopts & WAKE_BCAST) { 1690 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; 1691 netdev_info(dev->net, "enabling broadcast detection\n"); 1692 filter_mask[filter * 4] = 0x003F; 1693 filter_mask[filter * 4 + 1] = 0x00; 1694 filter_mask[filter * 4 + 2] = 0x00; 1695 filter_mask[filter * 4 + 3] = 0x00; 1696 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1697 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1698 crc[filter/2] |= smsc_crc(bcast, 6, filter); 1699 filter++; 1700 } 1701 1702 if (pdata->wolopts & WAKE_MCAST) { 1703 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1704 netdev_info(dev->net, "enabling multicast detection\n"); 1705 filter_mask[filter * 4] = 0x0007; 1706 filter_mask[filter * 4 + 1] = 0x00; 1707 filter_mask[filter * 4 + 2] = 0x00; 1708 filter_mask[filter * 4 + 3] = 0x00; 1709 command[filter/4] |= 0x09UL << ((filter % 4) * 8); 1710 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1711 crc[filter/2] |= smsc_crc(mcast, 3, filter); 1712 filter++; 1713 } 1714 1715 if (pdata->wolopts & WAKE_ARP) { 1716 const u8 arp[] = {0x08, 0x06}; 1717 netdev_info(dev->net, "enabling ARP detection\n"); 1718 filter_mask[filter * 4] = 0x0003; 1719 filter_mask[filter * 4 + 1] = 0x00; 1720 filter_mask[filter * 4 + 2] = 0x00; 1721 filter_mask[filter * 4 + 3] = 0x00; 1722 command[filter/4] |= 0x05UL << ((filter % 4) * 8); 1723 offset[filter/4] |= 0x0C << ((filter % 4) * 8); 1724 crc[filter/2] |= smsc_crc(arp, 2, filter); 1725 filter++; 1726 } 1727 1728 if (pdata->wolopts & WAKE_UCAST) { 1729 netdev_info(dev->net, "enabling unicast detection\n"); 1730 filter_mask[filter * 4] = 0x003F; 1731 filter_mask[filter * 4 + 1] = 0x00; 1732 filter_mask[filter * 4 + 2] = 0x00; 1733 filter_mask[filter * 4 + 3] = 0x00; 1734 command[filter/4] |= 0x01UL << ((filter % 4) * 8); 1735 offset[filter/4] |= 0x00 << ((filter % 4) * 8); 1736 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); 1737 filter++; 1738 } 1739 1740 for (i = 0; i < (wuff_filter_count * 4); i++) { 1741 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]); 1742 if (ret < 0) { 1743 kfree(filter_mask); 1744 goto done; 1745 } 1746 } 1747 kfree(filter_mask); 1748 1749 for (i = 0; i < (wuff_filter_count / 4); i++) { 1750 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]); 1751 if (ret < 0) 1752 goto done; 1753 } 1754 1755 for (i = 0; i < (wuff_filter_count / 4); i++) { 1756 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]); 1757 if (ret < 0) 1758 goto done; 1759 } 1760 1761 for (i = 0; i < (wuff_filter_count / 2); i++) { 1762 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]); 1763 if (ret < 0) 1764 goto done; 1765 } 1766 1767 /* clear any pending pattern match packet status */ 1768 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1769 if (ret < 0) 1770 goto done; 1771 1772 val |= WUCSR_WUFR_; 1773 1774 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1775 if (ret < 0) 1776 goto done; 1777 } 1778 1779 if (pdata->wolopts & WAKE_MAGIC) { 1780 /* clear any pending magic packet status */ 1781 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1782 if (ret < 0) 1783 goto done; 1784 1785 val |= WUCSR_MPR_; 1786 1787 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1788 if (ret < 0) 1789 goto done; 1790 } 1791 1792 /* enable/disable wakeup sources */ 1793 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1794 if (ret < 0) 1795 goto done; 1796 1797 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { 1798 netdev_info(dev->net, "enabling pattern match wakeup\n"); 1799 val |= WUCSR_WAKE_EN_; 1800 } else { 1801 netdev_info(dev->net, "disabling pattern match wakeup\n"); 1802 val &= ~WUCSR_WAKE_EN_; 1803 } 1804 1805 if (pdata->wolopts & WAKE_MAGIC) { 1806 netdev_info(dev->net, "enabling magic packet wakeup\n"); 1807 val |= WUCSR_MPEN_; 1808 } else { 1809 netdev_info(dev->net, "disabling magic packet wakeup\n"); 1810 val &= ~WUCSR_MPEN_; 1811 } 1812 1813 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1814 if (ret < 0) 1815 goto done; 1816 1817 /* enable wol wakeup source */ 1818 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1819 if (ret < 0) 1820 goto done; 1821 1822 val |= PM_CTL_WOL_EN_; 1823 1824 /* phy energy detect wakeup source */ 1825 if (pdata->wolopts & WAKE_PHY) 1826 val |= PM_CTL_ED_EN_; 1827 1828 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1829 if (ret < 0) 1830 goto done; 1831 1832 /* enable receiver to enable frame reception */ 1833 smsc95xx_start_rx_path(dev, 1); 1834 1835 /* some wol options are enabled, so enter SUSPEND0 */ 1836 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 1837 ret = smsc95xx_enter_suspend0(dev); 1838 1839 done: 1840 /* 1841 * TODO: resume() might need to handle the suspend failure 1842 * in system sleep 1843 */ 1844 if (ret && PMSG_IS_AUTO(message)) 1845 usbnet_resume(intf); 1846 1847 if (ret) 1848 schedule_delayed_work(&pdata->carrier_check, 1849 CARRIER_CHECK_DELAY); 1850 1851 return ret; 1852 } 1853 1854 static int smsc95xx_resume(struct usb_interface *intf) 1855 { 1856 struct usbnet *dev = usb_get_intfdata(intf); 1857 struct smsc95xx_priv *pdata; 1858 u8 suspend_flags; 1859 int ret; 1860 u32 val; 1861 1862 BUG_ON(!dev); 1863 pdata = (struct smsc95xx_priv *)(dev->data[0]); 1864 suspend_flags = pdata->suspend_flags; 1865 1866 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 1867 1868 /* do this first to ensure it's cleared even in error case */ 1869 pdata->suspend_flags = 0; 1870 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY); 1871 1872 if (suspend_flags & SUSPEND_ALLMODES) { 1873 /* clear wake-up sources */ 1874 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val); 1875 if (ret < 0) 1876 return ret; 1877 1878 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); 1879 1880 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val); 1881 if (ret < 0) 1882 return ret; 1883 1884 /* clear wake-up status */ 1885 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val); 1886 if (ret < 0) 1887 return ret; 1888 1889 val &= ~PM_CTL_WOL_EN_; 1890 val |= PM_CTL_WUPS_; 1891 1892 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val); 1893 if (ret < 0) 1894 return ret; 1895 } 1896 1897 ret = usbnet_resume(intf); 1898 if (ret < 0) 1899 netdev_warn(dev->net, "usbnet_resume error\n"); 1900 1901 return ret; 1902 } 1903 1904 static int smsc95xx_reset_resume(struct usb_interface *intf) 1905 { 1906 struct usbnet *dev = usb_get_intfdata(intf); 1907 int ret; 1908 1909 ret = smsc95xx_reset(dev); 1910 if (ret < 0) 1911 return ret; 1912 1913 return smsc95xx_resume(intf); 1914 } 1915 1916 static void smsc95xx_rx_csum_offload(struct sk_buff *skb) 1917 { 1918 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); 1919 skb->ip_summed = CHECKSUM_COMPLETE; 1920 skb_trim(skb, skb->len - 2); 1921 } 1922 1923 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 1924 { 1925 /* This check is no longer done by usbnet */ 1926 if (skb->len < dev->net->hard_header_len) 1927 return 0; 1928 1929 while (skb->len > 0) { 1930 u32 header, align_count; 1931 struct sk_buff *ax_skb; 1932 unsigned char *packet; 1933 u16 size; 1934 1935 header = get_unaligned_le32(skb->data); 1936 skb_pull(skb, 4 + NET_IP_ALIGN); 1937 packet = skb->data; 1938 1939 /* get the packet length */ 1940 size = (u16)((header & RX_STS_FL_) >> 16); 1941 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; 1942 1943 if (unlikely(header & RX_STS_ES_)) { 1944 netif_dbg(dev, rx_err, dev->net, 1945 "Error header=0x%08x\n", header); 1946 dev->net->stats.rx_errors++; 1947 dev->net->stats.rx_dropped++; 1948 1949 if (header & RX_STS_CRC_) { 1950 dev->net->stats.rx_crc_errors++; 1951 } else { 1952 if (header & (RX_STS_TL_ | RX_STS_RF_)) 1953 dev->net->stats.rx_frame_errors++; 1954 1955 if ((header & RX_STS_LE_) && 1956 (!(header & RX_STS_FT_))) 1957 dev->net->stats.rx_length_errors++; 1958 } 1959 } else { 1960 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ 1961 if (unlikely(size > (ETH_FRAME_LEN + 12))) { 1962 netif_dbg(dev, rx_err, dev->net, 1963 "size err header=0x%08x\n", header); 1964 return 0; 1965 } 1966 1967 /* last frame in this batch */ 1968 if (skb->len == size) { 1969 if (dev->net->features & NETIF_F_RXCSUM) 1970 smsc95xx_rx_csum_offload(skb); 1971 skb_trim(skb, skb->len - 4); /* remove fcs */ 1972 skb->truesize = size + sizeof(struct sk_buff); 1973 1974 return 1; 1975 } 1976 1977 ax_skb = skb_clone(skb, GFP_ATOMIC); 1978 if (unlikely(!ax_skb)) { 1979 netdev_warn(dev->net, "Error allocating skb\n"); 1980 return 0; 1981 } 1982 1983 ax_skb->len = size; 1984 ax_skb->data = packet; 1985 skb_set_tail_pointer(ax_skb, size); 1986 1987 if (dev->net->features & NETIF_F_RXCSUM) 1988 smsc95xx_rx_csum_offload(ax_skb); 1989 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 1990 ax_skb->truesize = size + sizeof(struct sk_buff); 1991 1992 usbnet_skb_return(dev, ax_skb); 1993 } 1994 1995 skb_pull(skb, size); 1996 1997 /* padding bytes before the next frame starts */ 1998 if (skb->len) 1999 skb_pull(skb, align_count); 2000 } 2001 2002 return 1; 2003 } 2004 2005 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) 2006 { 2007 u16 low_16 = (u16)skb_checksum_start_offset(skb); 2008 u16 high_16 = low_16 + skb->csum_offset; 2009 return (high_16 << 16) | low_16; 2010 } 2011 2012 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the 2013 * transmission. This is fairly unlikely, only seems to trigger with some 2014 * short TCP ACK packets sent. 2015 * 2016 * Note, this calculation should probably check for the alignment of the 2017 * data as well, but a straight check for csum being in the last four bytes 2018 * of the packet should be ok for now. 2019 */ 2020 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) 2021 { 2022 unsigned int len = skb->len - skb_checksum_start_offset(skb); 2023 2024 if (skb->len <= 45) 2025 return false; 2026 return skb->csum_offset < (len - (4 + 1)); 2027 } 2028 2029 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, 2030 struct sk_buff *skb, gfp_t flags) 2031 { 2032 bool csum = skb->ip_summed == CHECKSUM_PARTIAL; 2033 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; 2034 u32 tx_cmd_a, tx_cmd_b; 2035 void *ptr; 2036 2037 /* We do not advertise SG, so skbs should be already linearized */ 2038 BUG_ON(skb_shinfo(skb)->nr_frags); 2039 2040 /* Make writable and expand header space by overhead if required */ 2041 if (skb_cow_head(skb, overhead)) { 2042 /* Must deallocate here as returning NULL to indicate error 2043 * means the skb won't be deallocated in the caller. 2044 */ 2045 dev_kfree_skb_any(skb); 2046 return NULL; 2047 } 2048 2049 tx_cmd_b = (u32)skb->len; 2050 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; 2051 2052 if (csum) { 2053 if (!smsc95xx_can_tx_checksum(skb)) { 2054 /* workaround - hardware tx checksum does not work 2055 * properly with extremely small packets */ 2056 long csstart = skb_checksum_start_offset(skb); 2057 __wsum calc = csum_partial(skb->data + csstart, 2058 skb->len - csstart, 0); 2059 *((__sum16 *)(skb->data + csstart 2060 + skb->csum_offset)) = csum_fold(calc); 2061 2062 csum = false; 2063 } else { 2064 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); 2065 ptr = skb_push(skb, 4); 2066 put_unaligned_le32(csum_preamble, ptr); 2067 2068 tx_cmd_a += 4; 2069 tx_cmd_b += 4; 2070 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; 2071 } 2072 } 2073 2074 ptr = skb_push(skb, 8); 2075 put_unaligned_le32(tx_cmd_a, ptr); 2076 put_unaligned_le32(tx_cmd_b, ptr+4); 2077 2078 return skb; 2079 } 2080 2081 static int smsc95xx_manage_power(struct usbnet *dev, int on) 2082 { 2083 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); 2084 2085 dev->intf->needs_remote_wakeup = on; 2086 2087 if (pdata->features & FEATURE_REMOTE_WAKEUP) 2088 return 0; 2089 2090 /* this chip revision isn't capable of remote wakeup */ 2091 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); 2092 2093 if (on) 2094 usb_autopm_get_interface_no_resume(dev->intf); 2095 else 2096 usb_autopm_put_interface(dev->intf); 2097 2098 return 0; 2099 } 2100 2101 static const struct driver_info smsc95xx_info = { 2102 .description = "smsc95xx USB 2.0 Ethernet", 2103 .bind = smsc95xx_bind, 2104 .unbind = smsc95xx_unbind, 2105 .link_reset = smsc95xx_link_reset, 2106 .reset = smsc95xx_reset, 2107 .rx_fixup = smsc95xx_rx_fixup, 2108 .tx_fixup = smsc95xx_tx_fixup, 2109 .status = smsc95xx_status, 2110 .manage_power = smsc95xx_manage_power, 2111 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2112 }; 2113 2114 static const struct usb_device_id products[] = { 2115 { 2116 /* SMSC9500 USB Ethernet Device */ 2117 USB_DEVICE(0x0424, 0x9500), 2118 .driver_info = (unsigned long) &smsc95xx_info, 2119 }, 2120 { 2121 /* SMSC9505 USB Ethernet Device */ 2122 USB_DEVICE(0x0424, 0x9505), 2123 .driver_info = (unsigned long) &smsc95xx_info, 2124 }, 2125 { 2126 /* SMSC9500A USB Ethernet Device */ 2127 USB_DEVICE(0x0424, 0x9E00), 2128 .driver_info = (unsigned long) &smsc95xx_info, 2129 }, 2130 { 2131 /* SMSC9505A USB Ethernet Device */ 2132 USB_DEVICE(0x0424, 0x9E01), 2133 .driver_info = (unsigned long) &smsc95xx_info, 2134 }, 2135 { 2136 /* SMSC9512/9514 USB Hub & Ethernet Device */ 2137 USB_DEVICE(0x0424, 0xec00), 2138 .driver_info = (unsigned long) &smsc95xx_info, 2139 }, 2140 { 2141 /* SMSC9500 USB Ethernet Device (SAL10) */ 2142 USB_DEVICE(0x0424, 0x9900), 2143 .driver_info = (unsigned long) &smsc95xx_info, 2144 }, 2145 { 2146 /* SMSC9505 USB Ethernet Device (SAL10) */ 2147 USB_DEVICE(0x0424, 0x9901), 2148 .driver_info = (unsigned long) &smsc95xx_info, 2149 }, 2150 { 2151 /* SMSC9500A USB Ethernet Device (SAL10) */ 2152 USB_DEVICE(0x0424, 0x9902), 2153 .driver_info = (unsigned long) &smsc95xx_info, 2154 }, 2155 { 2156 /* SMSC9505A USB Ethernet Device (SAL10) */ 2157 USB_DEVICE(0x0424, 0x9903), 2158 .driver_info = (unsigned long) &smsc95xx_info, 2159 }, 2160 { 2161 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ 2162 USB_DEVICE(0x0424, 0x9904), 2163 .driver_info = (unsigned long) &smsc95xx_info, 2164 }, 2165 { 2166 /* SMSC9500A USB Ethernet Device (HAL) */ 2167 USB_DEVICE(0x0424, 0x9905), 2168 .driver_info = (unsigned long) &smsc95xx_info, 2169 }, 2170 { 2171 /* SMSC9505A USB Ethernet Device (HAL) */ 2172 USB_DEVICE(0x0424, 0x9906), 2173 .driver_info = (unsigned long) &smsc95xx_info, 2174 }, 2175 { 2176 /* SMSC9500 USB Ethernet Device (Alternate ID) */ 2177 USB_DEVICE(0x0424, 0x9907), 2178 .driver_info = (unsigned long) &smsc95xx_info, 2179 }, 2180 { 2181 /* SMSC9500A USB Ethernet Device (Alternate ID) */ 2182 USB_DEVICE(0x0424, 0x9908), 2183 .driver_info = (unsigned long) &smsc95xx_info, 2184 }, 2185 { 2186 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ 2187 USB_DEVICE(0x0424, 0x9909), 2188 .driver_info = (unsigned long) &smsc95xx_info, 2189 }, 2190 { 2191 /* SMSC LAN9530 USB Ethernet Device */ 2192 USB_DEVICE(0x0424, 0x9530), 2193 .driver_info = (unsigned long) &smsc95xx_info, 2194 }, 2195 { 2196 /* SMSC LAN9730 USB Ethernet Device */ 2197 USB_DEVICE(0x0424, 0x9730), 2198 .driver_info = (unsigned long) &smsc95xx_info, 2199 }, 2200 { 2201 /* SMSC LAN89530 USB Ethernet Device */ 2202 USB_DEVICE(0x0424, 0x9E08), 2203 .driver_info = (unsigned long) &smsc95xx_info, 2204 }, 2205 { }, /* END */ 2206 }; 2207 MODULE_DEVICE_TABLE(usb, products); 2208 2209 static struct usb_driver smsc95xx_driver = { 2210 .name = "smsc95xx", 2211 .id_table = products, 2212 .probe = usbnet_probe, 2213 .suspend = smsc95xx_suspend, 2214 .resume = smsc95xx_resume, 2215 .reset_resume = smsc95xx_reset_resume, 2216 .disconnect = usbnet_disconnect, 2217 .disable_hub_initiated_lpm = 1, 2218 .supports_autosuspend = 1, 2219 }; 2220 2221 module_usb_driver(smsc95xx_driver); 2222 2223 MODULE_AUTHOR("Nancy Lin"); 2224 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2225 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); 2226 MODULE_LICENSE("GPL"); 2227