1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /*************************************************************************** 3 * 4 * Copyright (C) 2007-2010 SMSC 5 * 6 *****************************************************************************/ 7 8 #include <linux/module.h> 9 #include <linux/kmod.h> 10 #include <linux/netdevice.h> 11 #include <linux/etherdevice.h> 12 #include <linux/ethtool.h> 13 #include <linux/mii.h> 14 #include <linux/usb.h> 15 #include <linux/bitrev.h> 16 #include <linux/crc16.h> 17 #include <linux/crc32.h> 18 #include <linux/usb/usbnet.h> 19 #include <linux/slab.h> 20 #include <linux/of_net.h> 21 #include "smsc75xx.h" 22 23 #define SMSC_CHIPNAME "smsc75xx" 24 #define HS_USB_PKT_SIZE (512) 25 #define FS_USB_PKT_SIZE (64) 26 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) 27 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) 28 #define DEFAULT_BULK_IN_DELAY (0x00002000) 29 #define MAX_SINGLE_PACKET_SIZE (9000) 30 #define LAN75XX_EEPROM_MAGIC (0x7500) 31 #define EEPROM_MAC_OFFSET (0x01) 32 #define DEFAULT_TX_CSUM_ENABLE (true) 33 #define DEFAULT_RX_CSUM_ENABLE (true) 34 #define SMSC75XX_INTERNAL_PHY_ID (1) 35 #define SMSC75XX_TX_OVERHEAD (8) 36 #define MAX_RX_FIFO_SIZE (20 * 1024) 37 #define MAX_TX_FIFO_SIZE (12 * 1024) 38 #define USB_VENDOR_ID_SMSC (0x0424) 39 #define USB_PRODUCT_ID_LAN7500 (0x7500) 40 #define USB_PRODUCT_ID_LAN7505 (0x7505) 41 #define RXW_PADDING 2 42 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ 43 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) 44 45 #define SUSPEND_SUSPEND0 (0x01) 46 #define SUSPEND_SUSPEND1 (0x02) 47 #define SUSPEND_SUSPEND2 (0x04) 48 #define SUSPEND_SUSPEND3 (0x08) 49 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ 50 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) 51 52 struct smsc75xx_priv { 53 struct usbnet *dev; 54 u32 rfe_ctl; 55 u32 wolopts; 56 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN]; 57 struct mutex dataport_mutex; 58 spinlock_t rfe_ctl_lock; 59 struct work_struct set_multicast; 60 u8 suspend_flags; 61 }; 62 63 static bool turbo_mode = true; 64 module_param(turbo_mode, bool, 0644); 65 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 66 67 static int smsc75xx_link_ok_nopm(struct usbnet *dev); 68 static int smsc75xx_phy_gig_workaround(struct usbnet *dev); 69 70 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index, 71 u32 *data, int in_pm) 72 { 73 u32 buf; 74 int ret; 75 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 76 77 BUG_ON(!dev); 78 79 if (!in_pm) 80 fn = usbnet_read_cmd; 81 else 82 fn = usbnet_read_cmd_nopm; 83 84 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 85 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 86 0, index, &buf, 4); 87 if (unlikely(ret < 4)) { 88 ret = ret < 0 ? ret : -ENODATA; 89 90 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 91 index, ret); 92 return ret; 93 } 94 95 le32_to_cpus(&buf); 96 *data = buf; 97 98 return ret; 99 } 100 101 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index, 102 u32 data, int in_pm) 103 { 104 u32 buf; 105 int ret; 106 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 107 108 BUG_ON(!dev); 109 110 if (!in_pm) 111 fn = usbnet_write_cmd; 112 else 113 fn = usbnet_write_cmd_nopm; 114 115 buf = data; 116 cpu_to_le32s(&buf); 117 118 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 119 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 120 0, index, &buf, 4); 121 if (unlikely(ret < 0)) 122 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 123 index, ret); 124 125 return ret; 126 } 127 128 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index, 129 u32 *data) 130 { 131 return __smsc75xx_read_reg(dev, index, data, 1); 132 } 133 134 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index, 135 u32 data) 136 { 137 return __smsc75xx_write_reg(dev, index, data, 1); 138 } 139 140 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index, 141 u32 *data) 142 { 143 return __smsc75xx_read_reg(dev, index, data, 0); 144 } 145 146 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index, 147 u32 data) 148 { 149 return __smsc75xx_write_reg(dev, index, data, 0); 150 } 151 152 /* Loop until the read is completed with timeout 153 * called with phy_mutex held */ 154 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev, 155 int in_pm) 156 { 157 unsigned long start_time = jiffies; 158 u32 val; 159 int ret; 160 161 do { 162 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm); 163 if (ret < 0) { 164 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 165 return ret; 166 } 167 168 if (!(val & MII_ACCESS_BUSY)) 169 return 0; 170 } while (!time_after(jiffies, start_time + HZ)); 171 172 return -EIO; 173 } 174 175 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx, 176 int in_pm) 177 { 178 struct usbnet *dev = netdev_priv(netdev); 179 u32 val, addr; 180 int ret; 181 182 mutex_lock(&dev->phy_mutex); 183 184 /* confirm MII not busy */ 185 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm); 186 if (ret < 0) { 187 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n"); 188 goto done; 189 } 190 191 /* set the address, index & direction (read from PHY) */ 192 phy_id &= dev->mii.phy_id_mask; 193 idx &= dev->mii.reg_num_mask; 194 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR) 195 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR) 196 | MII_ACCESS_READ | MII_ACCESS_BUSY; 197 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm); 198 if (ret < 0) { 199 netdev_warn(dev->net, "Error writing MII_ACCESS\n"); 200 goto done; 201 } 202 203 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm); 204 if (ret < 0) { 205 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 206 goto done; 207 } 208 209 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm); 210 if (ret < 0) { 211 netdev_warn(dev->net, "Error reading MII_DATA\n"); 212 goto done; 213 } 214 215 ret = (u16)(val & 0xFFFF); 216 217 done: 218 mutex_unlock(&dev->phy_mutex); 219 return ret; 220 } 221 222 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id, 223 int idx, int regval, int in_pm) 224 { 225 struct usbnet *dev = netdev_priv(netdev); 226 u32 val, addr; 227 int ret; 228 229 mutex_lock(&dev->phy_mutex); 230 231 /* confirm MII not busy */ 232 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm); 233 if (ret < 0) { 234 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n"); 235 goto done; 236 } 237 238 val = regval; 239 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm); 240 if (ret < 0) { 241 netdev_warn(dev->net, "Error writing MII_DATA\n"); 242 goto done; 243 } 244 245 /* set the address, index & direction (write to PHY) */ 246 phy_id &= dev->mii.phy_id_mask; 247 idx &= dev->mii.reg_num_mask; 248 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR) 249 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR) 250 | MII_ACCESS_WRITE | MII_ACCESS_BUSY; 251 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm); 252 if (ret < 0) { 253 netdev_warn(dev->net, "Error writing MII_ACCESS\n"); 254 goto done; 255 } 256 257 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm); 258 if (ret < 0) { 259 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 260 goto done; 261 } 262 263 done: 264 mutex_unlock(&dev->phy_mutex); 265 } 266 267 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id, 268 int idx) 269 { 270 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1); 271 } 272 273 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id, 274 int idx, int regval) 275 { 276 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1); 277 } 278 279 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx) 280 { 281 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0); 282 } 283 284 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx, 285 int regval) 286 { 287 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0); 288 } 289 290 static int smsc75xx_wait_eeprom(struct usbnet *dev) 291 { 292 unsigned long start_time = jiffies; 293 u32 val; 294 int ret; 295 296 do { 297 ret = smsc75xx_read_reg(dev, E2P_CMD, &val); 298 if (ret < 0) { 299 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 300 return ret; 301 } 302 303 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT)) 304 break; 305 udelay(40); 306 } while (!time_after(jiffies, start_time + HZ)); 307 308 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) { 309 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 310 return -EIO; 311 } 312 313 return 0; 314 } 315 316 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev) 317 { 318 unsigned long start_time = jiffies; 319 u32 val; 320 int ret; 321 322 do { 323 ret = smsc75xx_read_reg(dev, E2P_CMD, &val); 324 if (ret < 0) { 325 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 326 return ret; 327 } 328 329 if (!(val & E2P_CMD_BUSY)) 330 return 0; 331 332 udelay(40); 333 } while (!time_after(jiffies, start_time + HZ)); 334 335 netdev_warn(dev->net, "EEPROM is busy\n"); 336 return -EIO; 337 } 338 339 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 340 u8 *data) 341 { 342 u32 val; 343 int i, ret; 344 345 BUG_ON(!dev); 346 BUG_ON(!data); 347 348 ret = smsc75xx_eeprom_confirm_not_busy(dev); 349 if (ret) 350 return ret; 351 352 for (i = 0; i < length; i++) { 353 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR); 354 ret = smsc75xx_write_reg(dev, E2P_CMD, val); 355 if (ret < 0) { 356 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 357 return ret; 358 } 359 360 ret = smsc75xx_wait_eeprom(dev); 361 if (ret < 0) 362 return ret; 363 364 ret = smsc75xx_read_reg(dev, E2P_DATA, &val); 365 if (ret < 0) { 366 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 367 return ret; 368 } 369 370 data[i] = val & 0xFF; 371 offset++; 372 } 373 374 return 0; 375 } 376 377 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 378 u8 *data) 379 { 380 u32 val; 381 int i, ret; 382 383 BUG_ON(!dev); 384 BUG_ON(!data); 385 386 ret = smsc75xx_eeprom_confirm_not_busy(dev); 387 if (ret) 388 return ret; 389 390 /* Issue write/erase enable command */ 391 val = E2P_CMD_BUSY | E2P_CMD_EWEN; 392 ret = smsc75xx_write_reg(dev, E2P_CMD, val); 393 if (ret < 0) { 394 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 395 return ret; 396 } 397 398 ret = smsc75xx_wait_eeprom(dev); 399 if (ret < 0) 400 return ret; 401 402 for (i = 0; i < length; i++) { 403 404 /* Fill data register */ 405 val = data[i]; 406 ret = smsc75xx_write_reg(dev, E2P_DATA, val); 407 if (ret < 0) { 408 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 409 return ret; 410 } 411 412 /* Send "write" command */ 413 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR); 414 ret = smsc75xx_write_reg(dev, E2P_CMD, val); 415 if (ret < 0) { 416 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 417 return ret; 418 } 419 420 ret = smsc75xx_wait_eeprom(dev); 421 if (ret < 0) 422 return ret; 423 424 offset++; 425 } 426 427 return 0; 428 } 429 430 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev) 431 { 432 int i, ret; 433 434 for (i = 0; i < 100; i++) { 435 u32 dp_sel; 436 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel); 437 if (ret < 0) { 438 netdev_warn(dev->net, "Error reading DP_SEL\n"); 439 return ret; 440 } 441 442 if (dp_sel & DP_SEL_DPRDY) 443 return 0; 444 445 udelay(40); 446 } 447 448 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n"); 449 450 return -EIO; 451 } 452 453 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr, 454 u32 length, u32 *buf) 455 { 456 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 457 u32 dp_sel; 458 int i, ret; 459 460 mutex_lock(&pdata->dataport_mutex); 461 462 ret = smsc75xx_dataport_wait_not_busy(dev); 463 if (ret < 0) { 464 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n"); 465 goto done; 466 } 467 468 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel); 469 if (ret < 0) { 470 netdev_warn(dev->net, "Error reading DP_SEL\n"); 471 goto done; 472 } 473 474 dp_sel &= ~DP_SEL_RSEL; 475 dp_sel |= ram_select; 476 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel); 477 if (ret < 0) { 478 netdev_warn(dev->net, "Error writing DP_SEL\n"); 479 goto done; 480 } 481 482 for (i = 0; i < length; i++) { 483 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i); 484 if (ret < 0) { 485 netdev_warn(dev->net, "Error writing DP_ADDR\n"); 486 goto done; 487 } 488 489 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]); 490 if (ret < 0) { 491 netdev_warn(dev->net, "Error writing DP_DATA\n"); 492 goto done; 493 } 494 495 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE); 496 if (ret < 0) { 497 netdev_warn(dev->net, "Error writing DP_CMD\n"); 498 goto done; 499 } 500 501 ret = smsc75xx_dataport_wait_not_busy(dev); 502 if (ret < 0) { 503 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n"); 504 goto done; 505 } 506 } 507 508 done: 509 mutex_unlock(&pdata->dataport_mutex); 510 return ret; 511 } 512 513 /* returns hash bit number for given MAC address */ 514 static u32 smsc75xx_hash(char addr[ETH_ALEN]) 515 { 516 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff; 517 } 518 519 static void smsc75xx_deferred_multicast_write(struct work_struct *param) 520 { 521 struct smsc75xx_priv *pdata = 522 container_of(param, struct smsc75xx_priv, set_multicast); 523 struct usbnet *dev = pdata->dev; 524 int ret; 525 526 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n", 527 pdata->rfe_ctl); 528 529 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN, 530 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table); 531 532 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 533 if (ret < 0) 534 netdev_warn(dev->net, "Error writing RFE_CRL\n"); 535 } 536 537 static void smsc75xx_set_multicast(struct net_device *netdev) 538 { 539 struct usbnet *dev = netdev_priv(netdev); 540 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 541 unsigned long flags; 542 int i; 543 544 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); 545 546 pdata->rfe_ctl &= 547 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF); 548 pdata->rfe_ctl |= RFE_CTL_AB; 549 550 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++) 551 pdata->multicast_hash_table[i] = 0; 552 553 if (dev->net->flags & IFF_PROMISC) { 554 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 555 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU; 556 } else if (dev->net->flags & IFF_ALLMULTI) { 557 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 558 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF; 559 } else if (!netdev_mc_empty(dev->net)) { 560 struct netdev_hw_addr *ha; 561 562 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n"); 563 564 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF; 565 566 netdev_for_each_mc_addr(ha, netdev) { 567 u32 bitnum = smsc75xx_hash(ha->addr); 568 pdata->multicast_hash_table[bitnum / 32] |= 569 (1 << (bitnum % 32)); 570 } 571 } else { 572 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 573 pdata->rfe_ctl |= RFE_CTL_DPF; 574 } 575 576 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); 577 578 /* defer register writes to a sleepable context */ 579 schedule_work(&pdata->set_multicast); 580 } 581 582 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex, 583 u16 lcladv, u16 rmtadv) 584 { 585 u32 flow = 0, fct_flow = 0; 586 int ret; 587 588 if (duplex == DUPLEX_FULL) { 589 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 590 591 if (cap & FLOW_CTRL_TX) { 592 flow = (FLOW_TX_FCEN | 0xFFFF); 593 /* set fct_flow thresholds to 20% and 80% */ 594 fct_flow = (8 << 8) | 32; 595 } 596 597 if (cap & FLOW_CTRL_RX) 598 flow |= FLOW_RX_FCEN; 599 600 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 601 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), 602 (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); 603 } else { 604 netif_dbg(dev, link, dev->net, "half duplex\n"); 605 } 606 607 ret = smsc75xx_write_reg(dev, FLOW, flow); 608 if (ret < 0) { 609 netdev_warn(dev->net, "Error writing FLOW\n"); 610 return ret; 611 } 612 613 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow); 614 if (ret < 0) { 615 netdev_warn(dev->net, "Error writing FCT_FLOW\n"); 616 return ret; 617 } 618 619 return 0; 620 } 621 622 static int smsc75xx_link_reset(struct usbnet *dev) 623 { 624 struct mii_if_info *mii = &dev->mii; 625 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; 626 u16 lcladv, rmtadv; 627 int ret; 628 629 /* write to clear phy interrupt status */ 630 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC, 631 PHY_INT_SRC_CLEAR_ALL); 632 633 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL); 634 if (ret < 0) { 635 netdev_warn(dev->net, "Error writing INT_STS\n"); 636 return ret; 637 } 638 639 mii_check_media(mii, 1, 1); 640 mii_ethtool_gset(&dev->mii, &ecmd); 641 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE); 642 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA); 643 644 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n", 645 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv); 646 647 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv); 648 } 649 650 static void smsc75xx_status(struct usbnet *dev, struct urb *urb) 651 { 652 u32 intdata; 653 654 if (urb->actual_length != 4) { 655 netdev_warn(dev->net, "unexpected urb length %d\n", 656 urb->actual_length); 657 return; 658 } 659 660 intdata = get_unaligned_le32(urb->transfer_buffer); 661 662 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 663 664 if (intdata & INT_ENP_PHY_INT) 665 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 666 else 667 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 668 intdata); 669 } 670 671 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net) 672 { 673 return MAX_EEPROM_SIZE; 674 } 675 676 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev, 677 struct ethtool_eeprom *ee, u8 *data) 678 { 679 struct usbnet *dev = netdev_priv(netdev); 680 681 ee->magic = LAN75XX_EEPROM_MAGIC; 682 683 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data); 684 } 685 686 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev, 687 struct ethtool_eeprom *ee, u8 *data) 688 { 689 struct usbnet *dev = netdev_priv(netdev); 690 691 if (ee->magic != LAN75XX_EEPROM_MAGIC) { 692 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n", 693 ee->magic); 694 return -EINVAL; 695 } 696 697 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data); 698 } 699 700 static void smsc75xx_ethtool_get_wol(struct net_device *net, 701 struct ethtool_wolinfo *wolinfo) 702 { 703 struct usbnet *dev = netdev_priv(net); 704 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 705 706 wolinfo->supported = SUPPORTED_WAKE; 707 wolinfo->wolopts = pdata->wolopts; 708 } 709 710 static int smsc75xx_ethtool_set_wol(struct net_device *net, 711 struct ethtool_wolinfo *wolinfo) 712 { 713 struct usbnet *dev = netdev_priv(net); 714 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 715 int ret; 716 717 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 718 return -EINVAL; 719 720 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 721 722 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 723 if (ret < 0) 724 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 725 726 return ret; 727 } 728 729 static const struct ethtool_ops smsc75xx_ethtool_ops = { 730 .get_link = usbnet_get_link, 731 .nway_reset = usbnet_nway_reset, 732 .get_drvinfo = usbnet_get_drvinfo, 733 .get_msglevel = usbnet_get_msglevel, 734 .set_msglevel = usbnet_set_msglevel, 735 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len, 736 .get_eeprom = smsc75xx_ethtool_get_eeprom, 737 .set_eeprom = smsc75xx_ethtool_set_eeprom, 738 .get_wol = smsc75xx_ethtool_get_wol, 739 .set_wol = smsc75xx_ethtool_set_wol, 740 .get_link_ksettings = usbnet_get_link_ksettings_mii, 741 .set_link_ksettings = usbnet_set_link_ksettings_mii, 742 }; 743 744 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 745 { 746 if (!netif_running(netdev)) 747 return -EINVAL; 748 749 return usbnet_mii_ioctl(netdev, rq, cmd); 750 } 751 752 static void smsc75xx_init_mac_address(struct usbnet *dev) 753 { 754 u8 addr[ETH_ALEN]; 755 756 /* maybe the boot loader passed the MAC address in devicetree */ 757 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { 758 if (is_valid_ether_addr(dev->net->dev_addr)) { 759 /* device tree values are valid so use them */ 760 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); 761 return; 762 } 763 } 764 765 /* try reading mac address from EEPROM */ 766 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { 767 eth_hw_addr_set(dev->net, addr); 768 if (is_valid_ether_addr(dev->net->dev_addr)) { 769 /* eeprom values are valid so use them */ 770 netif_dbg(dev, ifup, dev->net, 771 "MAC address read from EEPROM\n"); 772 return; 773 } 774 } 775 776 /* no useful static MAC address found. generate a random one */ 777 eth_hw_addr_random(dev->net); 778 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 779 } 780 781 static int smsc75xx_set_mac_address(struct usbnet *dev) 782 { 783 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 784 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 785 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 786 787 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi); 788 if (ret < 0) { 789 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret); 790 return ret; 791 } 792 793 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo); 794 if (ret < 0) { 795 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret); 796 return ret; 797 } 798 799 addr_hi |= ADDR_FILTX_FB_VALID; 800 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi); 801 if (ret < 0) { 802 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret); 803 return ret; 804 } 805 806 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo); 807 if (ret < 0) 808 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret); 809 810 return ret; 811 } 812 813 static int smsc75xx_phy_initialize(struct usbnet *dev) 814 { 815 int bmcr, ret, timeout = 0; 816 817 /* Initialize MII structure */ 818 dev->mii.dev = dev->net; 819 dev->mii.mdio_read = smsc75xx_mdio_read; 820 dev->mii.mdio_write = smsc75xx_mdio_write; 821 dev->mii.phy_id_mask = 0x1f; 822 dev->mii.reg_num_mask = 0x1f; 823 dev->mii.supports_gmii = 1; 824 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID; 825 826 /* reset phy and wait for reset to complete */ 827 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 828 829 do { 830 msleep(10); 831 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR); 832 if (bmcr < 0) { 833 netdev_warn(dev->net, "Error reading MII_BMCR\n"); 834 return bmcr; 835 } 836 timeout++; 837 } while ((bmcr & BMCR_RESET) && (timeout < 100)); 838 839 if (timeout >= 100) { 840 netdev_warn(dev->net, "timeout on PHY Reset\n"); 841 return -EIO; 842 } 843 844 /* phy workaround for gig link */ 845 smsc75xx_phy_gig_workaround(dev); 846 847 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 848 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | 849 ADVERTISE_PAUSE_ASYM); 850 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000, 851 ADVERTISE_1000FULL); 852 853 /* read and write to clear phy interrupt status */ 854 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); 855 if (ret < 0) { 856 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n"); 857 return ret; 858 } 859 860 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff); 861 862 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, 863 PHY_INT_MASK_DEFAULT); 864 mii_nway_restart(&dev->mii); 865 866 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n"); 867 return 0; 868 } 869 870 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size) 871 { 872 int ret = 0; 873 u32 buf; 874 bool rxenabled; 875 876 ret = smsc75xx_read_reg(dev, MAC_RX, &buf); 877 if (ret < 0) { 878 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret); 879 return ret; 880 } 881 882 rxenabled = ((buf & MAC_RX_RXEN) != 0); 883 884 if (rxenabled) { 885 buf &= ~MAC_RX_RXEN; 886 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 887 if (ret < 0) { 888 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 889 return ret; 890 } 891 } 892 893 /* add 4 to size for FCS */ 894 buf &= ~MAC_RX_MAX_SIZE; 895 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE); 896 897 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 898 if (ret < 0) { 899 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 900 return ret; 901 } 902 903 if (rxenabled) { 904 buf |= MAC_RX_RXEN; 905 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 906 if (ret < 0) { 907 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 908 return ret; 909 } 910 } 911 912 return 0; 913 } 914 915 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu) 916 { 917 struct usbnet *dev = netdev_priv(netdev); 918 int ret; 919 920 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN); 921 if (ret < 0) { 922 netdev_warn(dev->net, "Failed to set mac rx frame length\n"); 923 return ret; 924 } 925 926 return usbnet_change_mtu(netdev, new_mtu); 927 } 928 929 /* Enable or disable Rx checksum offload engine */ 930 static int smsc75xx_set_features(struct net_device *netdev, 931 netdev_features_t features) 932 { 933 struct usbnet *dev = netdev_priv(netdev); 934 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 935 unsigned long flags; 936 int ret; 937 938 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); 939 940 if (features & NETIF_F_RXCSUM) 941 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM; 942 else 943 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM); 944 945 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); 946 /* it's racing here! */ 947 948 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 949 if (ret < 0) { 950 netdev_warn(dev->net, "Error writing RFE_CTL\n"); 951 return ret; 952 } 953 return 0; 954 } 955 956 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm) 957 { 958 int timeout = 0; 959 960 do { 961 u32 buf; 962 int ret; 963 964 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm); 965 966 if (ret < 0) { 967 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 968 return ret; 969 } 970 971 if (buf & PMT_CTL_DEV_RDY) 972 return 0; 973 974 msleep(10); 975 timeout++; 976 } while (timeout < 100); 977 978 netdev_warn(dev->net, "timeout waiting for device ready\n"); 979 return -EIO; 980 } 981 982 static int smsc75xx_phy_gig_workaround(struct usbnet *dev) 983 { 984 struct mii_if_info *mii = &dev->mii; 985 int ret = 0, timeout = 0; 986 u32 buf, link_up = 0; 987 988 /* Set the phy in Gig loopback */ 989 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040); 990 991 /* Wait for the link up */ 992 do { 993 link_up = smsc75xx_link_ok_nopm(dev); 994 usleep_range(10000, 20000); 995 timeout++; 996 } while ((!link_up) && (timeout < 1000)); 997 998 if (timeout >= 1000) { 999 netdev_warn(dev->net, "Timeout waiting for PHY link up\n"); 1000 return -EIO; 1001 } 1002 1003 /* phy reset */ 1004 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1005 if (ret < 0) { 1006 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1007 return ret; 1008 } 1009 1010 buf |= PMT_CTL_PHY_RST; 1011 1012 ret = smsc75xx_write_reg(dev, PMT_CTL, buf); 1013 if (ret < 0) { 1014 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret); 1015 return ret; 1016 } 1017 1018 timeout = 0; 1019 do { 1020 usleep_range(10000, 20000); 1021 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1022 if (ret < 0) { 1023 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", 1024 ret); 1025 return ret; 1026 } 1027 timeout++; 1028 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100)); 1029 1030 if (timeout >= 100) { 1031 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1032 return -EIO; 1033 } 1034 1035 return 0; 1036 } 1037 1038 static int smsc75xx_reset(struct usbnet *dev) 1039 { 1040 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1041 u32 buf; 1042 int ret = 0, timeout; 1043 1044 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n"); 1045 1046 ret = smsc75xx_wait_ready(dev, 0); 1047 if (ret < 0) { 1048 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n"); 1049 return ret; 1050 } 1051 1052 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1053 if (ret < 0) { 1054 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1055 return ret; 1056 } 1057 1058 buf |= HW_CFG_LRST; 1059 1060 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1061 if (ret < 0) { 1062 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1063 return ret; 1064 } 1065 1066 timeout = 0; 1067 do { 1068 msleep(10); 1069 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1070 if (ret < 0) { 1071 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1072 return ret; 1073 } 1074 timeout++; 1075 } while ((buf & HW_CFG_LRST) && (timeout < 100)); 1076 1077 if (timeout >= 100) { 1078 netdev_warn(dev->net, "timeout on completion of Lite Reset\n"); 1079 return -EIO; 1080 } 1081 1082 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n"); 1083 1084 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1085 if (ret < 0) { 1086 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1087 return ret; 1088 } 1089 1090 buf |= PMT_CTL_PHY_RST; 1091 1092 ret = smsc75xx_write_reg(dev, PMT_CTL, buf); 1093 if (ret < 0) { 1094 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret); 1095 return ret; 1096 } 1097 1098 timeout = 0; 1099 do { 1100 msleep(10); 1101 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1102 if (ret < 0) { 1103 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1104 return ret; 1105 } 1106 timeout++; 1107 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100)); 1108 1109 if (timeout >= 100) { 1110 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1111 return -EIO; 1112 } 1113 1114 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n"); 1115 1116 ret = smsc75xx_set_mac_address(dev); 1117 if (ret < 0) { 1118 netdev_warn(dev->net, "Failed to set mac address\n"); 1119 return ret; 1120 } 1121 1122 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 1123 dev->net->dev_addr); 1124 1125 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1126 if (ret < 0) { 1127 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1128 return ret; 1129 } 1130 1131 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 1132 buf); 1133 1134 buf |= HW_CFG_BIR; 1135 1136 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1137 if (ret < 0) { 1138 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1139 return ret; 1140 } 1141 1142 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1143 if (ret < 0) { 1144 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1145 return ret; 1146 } 1147 1148 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n", 1149 buf); 1150 1151 if (!turbo_mode) { 1152 buf = 0; 1153 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 1154 } else if (dev->udev->speed == USB_SPEED_HIGH) { 1155 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 1156 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 1157 } else { 1158 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 1159 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 1160 } 1161 1162 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 1163 (ulong)dev->rx_urb_size); 1164 1165 ret = smsc75xx_write_reg(dev, BURST_CAP, buf); 1166 if (ret < 0) { 1167 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret); 1168 return ret; 1169 } 1170 1171 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf); 1172 if (ret < 0) { 1173 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret); 1174 return ret; 1175 } 1176 1177 netif_dbg(dev, ifup, dev->net, 1178 "Read Value from BURST_CAP after writing: 0x%08x\n", buf); 1179 1180 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1181 if (ret < 0) { 1182 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret); 1183 return ret; 1184 } 1185 1186 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf); 1187 if (ret < 0) { 1188 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret); 1189 return ret; 1190 } 1191 1192 netif_dbg(dev, ifup, dev->net, 1193 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf); 1194 1195 if (turbo_mode) { 1196 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1197 if (ret < 0) { 1198 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1199 return ret; 1200 } 1201 1202 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf); 1203 1204 buf |= (HW_CFG_MEF | HW_CFG_BCE); 1205 1206 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1207 if (ret < 0) { 1208 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1209 return ret; 1210 } 1211 1212 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1213 if (ret < 0) { 1214 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1215 return ret; 1216 } 1217 1218 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf); 1219 } 1220 1221 /* set FIFO sizes */ 1222 buf = (MAX_RX_FIFO_SIZE - 512) / 512; 1223 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf); 1224 if (ret < 0) { 1225 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret); 1226 return ret; 1227 } 1228 1229 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf); 1230 1231 buf = (MAX_TX_FIFO_SIZE - 512) / 512; 1232 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf); 1233 if (ret < 0) { 1234 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret); 1235 return ret; 1236 } 1237 1238 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf); 1239 1240 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL); 1241 if (ret < 0) { 1242 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret); 1243 return ret; 1244 } 1245 1246 ret = smsc75xx_read_reg(dev, ID_REV, &buf); 1247 if (ret < 0) { 1248 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret); 1249 return ret; 1250 } 1251 1252 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf); 1253 1254 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf); 1255 if (ret < 0) { 1256 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret); 1257 return ret; 1258 } 1259 1260 /* only set default GPIO/LED settings if no EEPROM is detected */ 1261 if (!(buf & E2P_CMD_LOADED)) { 1262 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf); 1263 if (ret < 0) { 1264 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret); 1265 return ret; 1266 } 1267 1268 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL); 1269 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL; 1270 1271 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf); 1272 if (ret < 0) { 1273 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret); 1274 return ret; 1275 } 1276 } 1277 1278 ret = smsc75xx_write_reg(dev, FLOW, 0); 1279 if (ret < 0) { 1280 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret); 1281 return ret; 1282 } 1283 1284 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0); 1285 if (ret < 0) { 1286 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret); 1287 return ret; 1288 } 1289 1290 /* Don't need rfe_ctl_lock during initialisation */ 1291 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); 1292 if (ret < 0) { 1293 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret); 1294 return ret; 1295 } 1296 1297 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF; 1298 1299 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 1300 if (ret < 0) { 1301 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret); 1302 return ret; 1303 } 1304 1305 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); 1306 if (ret < 0) { 1307 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret); 1308 return ret; 1309 } 1310 1311 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n", 1312 pdata->rfe_ctl); 1313 1314 /* Enable or disable checksum offload engines */ 1315 smsc75xx_set_features(dev->net, dev->net->features); 1316 1317 smsc75xx_set_multicast(dev->net); 1318 1319 ret = smsc75xx_phy_initialize(dev); 1320 if (ret < 0) { 1321 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret); 1322 return ret; 1323 } 1324 1325 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf); 1326 if (ret < 0) { 1327 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret); 1328 return ret; 1329 } 1330 1331 /* enable PHY interrupts */ 1332 buf |= INT_ENP_PHY_INT; 1333 1334 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf); 1335 if (ret < 0) { 1336 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret); 1337 return ret; 1338 } 1339 1340 /* allow mac to detect speed and duplex from phy */ 1341 ret = smsc75xx_read_reg(dev, MAC_CR, &buf); 1342 if (ret < 0) { 1343 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret); 1344 return ret; 1345 } 1346 1347 buf |= (MAC_CR_ADD | MAC_CR_ASD); 1348 ret = smsc75xx_write_reg(dev, MAC_CR, buf); 1349 if (ret < 0) { 1350 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret); 1351 return ret; 1352 } 1353 1354 ret = smsc75xx_read_reg(dev, MAC_TX, &buf); 1355 if (ret < 0) { 1356 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret); 1357 return ret; 1358 } 1359 1360 buf |= MAC_TX_TXEN; 1361 1362 ret = smsc75xx_write_reg(dev, MAC_TX, buf); 1363 if (ret < 0) { 1364 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret); 1365 return ret; 1366 } 1367 1368 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf); 1369 1370 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf); 1371 if (ret < 0) { 1372 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret); 1373 return ret; 1374 } 1375 1376 buf |= FCT_TX_CTL_EN; 1377 1378 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf); 1379 if (ret < 0) { 1380 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret); 1381 return ret; 1382 } 1383 1384 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf); 1385 1386 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN); 1387 if (ret < 0) { 1388 netdev_warn(dev->net, "Failed to set max rx frame length\n"); 1389 return ret; 1390 } 1391 1392 ret = smsc75xx_read_reg(dev, MAC_RX, &buf); 1393 if (ret < 0) { 1394 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret); 1395 return ret; 1396 } 1397 1398 buf |= MAC_RX_RXEN; 1399 1400 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 1401 if (ret < 0) { 1402 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 1403 return ret; 1404 } 1405 1406 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf); 1407 1408 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf); 1409 if (ret < 0) { 1410 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret); 1411 return ret; 1412 } 1413 1414 buf |= FCT_RX_CTL_EN; 1415 1416 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf); 1417 if (ret < 0) { 1418 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret); 1419 return ret; 1420 } 1421 1422 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf); 1423 1424 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n"); 1425 return 0; 1426 } 1427 1428 static const struct net_device_ops smsc75xx_netdev_ops = { 1429 .ndo_open = usbnet_open, 1430 .ndo_stop = usbnet_stop, 1431 .ndo_start_xmit = usbnet_start_xmit, 1432 .ndo_tx_timeout = usbnet_tx_timeout, 1433 .ndo_get_stats64 = dev_get_tstats64, 1434 .ndo_change_mtu = smsc75xx_change_mtu, 1435 .ndo_set_mac_address = eth_mac_addr, 1436 .ndo_validate_addr = eth_validate_addr, 1437 .ndo_eth_ioctl = smsc75xx_ioctl, 1438 .ndo_set_rx_mode = smsc75xx_set_multicast, 1439 .ndo_set_features = smsc75xx_set_features, 1440 }; 1441 1442 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf) 1443 { 1444 struct smsc75xx_priv *pdata = NULL; 1445 int ret; 1446 1447 ret = usbnet_get_endpoints(dev, intf); 1448 if (ret < 0) { 1449 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1450 return ret; 1451 } 1452 1453 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv), 1454 GFP_KERNEL); 1455 1456 pdata = (struct smsc75xx_priv *)(dev->data[0]); 1457 if (!pdata) 1458 return -ENOMEM; 1459 1460 pdata->dev = dev; 1461 1462 spin_lock_init(&pdata->rfe_ctl_lock); 1463 mutex_init(&pdata->dataport_mutex); 1464 1465 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write); 1466 1467 if (DEFAULT_TX_CSUM_ENABLE) 1468 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1469 1470 if (DEFAULT_RX_CSUM_ENABLE) 1471 dev->net->features |= NETIF_F_RXCSUM; 1472 1473 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 1474 NETIF_F_RXCSUM; 1475 1476 ret = smsc75xx_wait_ready(dev, 0); 1477 if (ret < 0) { 1478 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n"); 1479 goto free_pdata; 1480 } 1481 1482 smsc75xx_init_mac_address(dev); 1483 1484 /* Init all registers */ 1485 ret = smsc75xx_reset(dev); 1486 if (ret < 0) { 1487 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret); 1488 goto cancel_work; 1489 } 1490 1491 dev->net->netdev_ops = &smsc75xx_netdev_ops; 1492 dev->net->ethtool_ops = &smsc75xx_ethtool_ops; 1493 dev->net->flags |= IFF_MULTICAST; 1494 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD; 1495 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1496 dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE; 1497 return 0; 1498 1499 cancel_work: 1500 cancel_work_sync(&pdata->set_multicast); 1501 free_pdata: 1502 kfree(pdata); 1503 dev->data[0] = 0; 1504 return ret; 1505 } 1506 1507 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1508 { 1509 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1510 if (pdata) { 1511 cancel_work_sync(&pdata->set_multicast); 1512 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1513 kfree(pdata); 1514 dev->data[0] = 0; 1515 } 1516 } 1517 1518 static u16 smsc_crc(const u8 *buffer, size_t len) 1519 { 1520 return bitrev16(crc16(0xFFFF, buffer, len)); 1521 } 1522 1523 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg, 1524 u32 wuf_mask1) 1525 { 1526 int cfg_base = WUF_CFGX + filter * 4; 1527 int mask_base = WUF_MASKX + filter * 16; 1528 int ret; 1529 1530 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg); 1531 if (ret < 0) { 1532 netdev_warn(dev->net, "Error writing WUF_CFGX\n"); 1533 return ret; 1534 } 1535 1536 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1); 1537 if (ret < 0) { 1538 netdev_warn(dev->net, "Error writing WUF_MASKX\n"); 1539 return ret; 1540 } 1541 1542 ret = smsc75xx_write_reg(dev, mask_base + 4, 0); 1543 if (ret < 0) { 1544 netdev_warn(dev->net, "Error writing WUF_MASKX\n"); 1545 return ret; 1546 } 1547 1548 ret = smsc75xx_write_reg(dev, mask_base + 8, 0); 1549 if (ret < 0) { 1550 netdev_warn(dev->net, "Error writing WUF_MASKX\n"); 1551 return ret; 1552 } 1553 1554 ret = smsc75xx_write_reg(dev, mask_base + 12, 0); 1555 if (ret < 0) { 1556 netdev_warn(dev->net, "Error writing WUF_MASKX\n"); 1557 return ret; 1558 } 1559 1560 return 0; 1561 } 1562 1563 static int smsc75xx_enter_suspend0(struct usbnet *dev) 1564 { 1565 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1566 u32 val; 1567 int ret; 1568 1569 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1570 if (ret < 0) { 1571 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1572 return ret; 1573 } 1574 1575 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST)); 1576 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS; 1577 1578 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1579 if (ret < 0) { 1580 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1581 return ret; 1582 } 1583 1584 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1585 1586 return 0; 1587 } 1588 1589 static int smsc75xx_enter_suspend1(struct usbnet *dev) 1590 { 1591 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1592 u32 val; 1593 int ret; 1594 1595 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1596 if (ret < 0) { 1597 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1598 return ret; 1599 } 1600 1601 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST); 1602 val |= PMT_CTL_SUS_MODE_1; 1603 1604 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1605 if (ret < 0) { 1606 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1607 return ret; 1608 } 1609 1610 /* clear wol status, enable energy detection */ 1611 val &= ~PMT_CTL_WUPS; 1612 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN); 1613 1614 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1615 if (ret < 0) { 1616 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1617 return ret; 1618 } 1619 1620 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1621 1622 return 0; 1623 } 1624 1625 static int smsc75xx_enter_suspend2(struct usbnet *dev) 1626 { 1627 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1628 u32 val; 1629 int ret; 1630 1631 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1632 if (ret < 0) { 1633 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1634 return ret; 1635 } 1636 1637 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST); 1638 val |= PMT_CTL_SUS_MODE_2; 1639 1640 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1641 if (ret < 0) { 1642 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1643 return ret; 1644 } 1645 1646 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1647 1648 return 0; 1649 } 1650 1651 static int smsc75xx_enter_suspend3(struct usbnet *dev) 1652 { 1653 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1654 u32 val; 1655 int ret; 1656 1657 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val); 1658 if (ret < 0) { 1659 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n"); 1660 return ret; 1661 } 1662 1663 if (val & FCT_RX_CTL_RXUSED) { 1664 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n"); 1665 return -EBUSY; 1666 } 1667 1668 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1669 if (ret < 0) { 1670 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1671 return ret; 1672 } 1673 1674 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST); 1675 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN; 1676 1677 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1678 if (ret < 0) { 1679 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1680 return ret; 1681 } 1682 1683 /* clear wol status */ 1684 val &= ~PMT_CTL_WUPS; 1685 val |= PMT_CTL_WUPS_WOL; 1686 1687 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1688 if (ret < 0) { 1689 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1690 return ret; 1691 } 1692 1693 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1694 1695 return 0; 1696 } 1697 1698 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1699 { 1700 struct mii_if_info *mii = &dev->mii; 1701 int ret; 1702 1703 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1704 1705 /* read to clear */ 1706 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC); 1707 if (ret < 0) { 1708 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n"); 1709 return ret; 1710 } 1711 1712 /* enable interrupt source */ 1713 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK); 1714 if (ret < 0) { 1715 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n"); 1716 return ret; 1717 } 1718 1719 ret |= mask; 1720 1721 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret); 1722 1723 return 0; 1724 } 1725 1726 static int smsc75xx_link_ok_nopm(struct usbnet *dev) 1727 { 1728 struct mii_if_info *mii = &dev->mii; 1729 int ret; 1730 1731 /* first, a dummy read, needed to latch some MII phys */ 1732 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1733 if (ret < 0) { 1734 netdev_warn(dev->net, "Error reading MII_BMSR\n"); 1735 return ret; 1736 } 1737 1738 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1739 if (ret < 0) { 1740 netdev_warn(dev->net, "Error reading MII_BMSR\n"); 1741 return ret; 1742 } 1743 1744 return !!(ret & BMSR_LSTATUS); 1745 } 1746 1747 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up) 1748 { 1749 int ret; 1750 1751 if (!netif_running(dev->net)) { 1752 /* interface is ifconfig down so fully power down hw */ 1753 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1754 return smsc75xx_enter_suspend2(dev); 1755 } 1756 1757 if (!link_up) { 1758 /* link is down so enter EDPD mode */ 1759 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1760 1761 /* enable PHY wakeup events for if cable is attached */ 1762 ret = smsc75xx_enable_phy_wakeup_interrupts(dev, 1763 PHY_INT_MASK_ANEG_COMP); 1764 if (ret < 0) { 1765 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1766 return ret; 1767 } 1768 1769 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1770 return smsc75xx_enter_suspend1(dev); 1771 } 1772 1773 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1774 ret = smsc75xx_enable_phy_wakeup_interrupts(dev, 1775 PHY_INT_MASK_LINK_DOWN); 1776 if (ret < 0) { 1777 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1778 return ret; 1779 } 1780 1781 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1782 return smsc75xx_enter_suspend3(dev); 1783 } 1784 1785 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message) 1786 { 1787 struct usbnet *dev = usb_get_intfdata(intf); 1788 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1789 u32 val, link_up; 1790 int ret; 1791 1792 ret = usbnet_suspend(intf, message); 1793 if (ret < 0) { 1794 netdev_warn(dev->net, "usbnet_suspend error\n"); 1795 return ret; 1796 } 1797 1798 if (pdata->suspend_flags) { 1799 netdev_warn(dev->net, "error during last resume\n"); 1800 pdata->suspend_flags = 0; 1801 } 1802 1803 /* determine if link is up using only _nopm functions */ 1804 link_up = smsc75xx_link_ok_nopm(dev); 1805 1806 if (message.event == PM_EVENT_AUTO_SUSPEND) { 1807 ret = smsc75xx_autosuspend(dev, link_up); 1808 goto done; 1809 } 1810 1811 /* if we get this far we're not autosuspending */ 1812 /* if no wol options set, or if link is down and we're not waking on 1813 * PHY activity, enter lowest power SUSPEND2 mode 1814 */ 1815 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1816 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1817 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1818 1819 /* disable energy detect (link up) & wake up events */ 1820 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1821 if (ret < 0) { 1822 netdev_warn(dev->net, "Error reading WUCSR\n"); 1823 goto done; 1824 } 1825 1826 val &= ~(WUCSR_MPEN | WUCSR_WUEN); 1827 1828 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1829 if (ret < 0) { 1830 netdev_warn(dev->net, "Error writing WUCSR\n"); 1831 goto done; 1832 } 1833 1834 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1835 if (ret < 0) { 1836 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1837 goto done; 1838 } 1839 1840 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN); 1841 1842 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1843 if (ret < 0) { 1844 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1845 goto done; 1846 } 1847 1848 ret = smsc75xx_enter_suspend2(dev); 1849 goto done; 1850 } 1851 1852 if (pdata->wolopts & WAKE_PHY) { 1853 ret = smsc75xx_enable_phy_wakeup_interrupts(dev, 1854 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN)); 1855 if (ret < 0) { 1856 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1857 goto done; 1858 } 1859 1860 /* if link is down then configure EDPD and enter SUSPEND1, 1861 * otherwise enter SUSPEND0 below 1862 */ 1863 if (!link_up) { 1864 struct mii_if_info *mii = &dev->mii; 1865 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1866 1867 /* enable energy detect power-down mode */ 1868 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, 1869 PHY_MODE_CTRL_STS); 1870 if (ret < 0) { 1871 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n"); 1872 goto done; 1873 } 1874 1875 ret |= MODE_CTRL_STS_EDPWRDOWN; 1876 1877 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, 1878 PHY_MODE_CTRL_STS, ret); 1879 1880 /* enter SUSPEND1 mode */ 1881 ret = smsc75xx_enter_suspend1(dev); 1882 goto done; 1883 } 1884 } 1885 1886 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) { 1887 int i, filter = 0; 1888 1889 /* disable all filters */ 1890 for (i = 0; i < WUF_NUM; i++) { 1891 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0); 1892 if (ret < 0) { 1893 netdev_warn(dev->net, "Error writing WUF_CFGX\n"); 1894 goto done; 1895 } 1896 } 1897 1898 if (pdata->wolopts & WAKE_MCAST) { 1899 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1900 netdev_info(dev->net, "enabling multicast detection\n"); 1901 1902 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST 1903 | smsc_crc(mcast, 3); 1904 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007); 1905 if (ret < 0) { 1906 netdev_warn(dev->net, "Error writing wakeup filter\n"); 1907 goto done; 1908 } 1909 } 1910 1911 if (pdata->wolopts & WAKE_ARP) { 1912 const u8 arp[] = {0x08, 0x06}; 1913 netdev_info(dev->net, "enabling ARP detection\n"); 1914 1915 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16) 1916 | smsc_crc(arp, 2); 1917 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003); 1918 if (ret < 0) { 1919 netdev_warn(dev->net, "Error writing wakeup filter\n"); 1920 goto done; 1921 } 1922 } 1923 1924 /* clear any pending pattern match packet status */ 1925 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1926 if (ret < 0) { 1927 netdev_warn(dev->net, "Error reading WUCSR\n"); 1928 goto done; 1929 } 1930 1931 val |= WUCSR_WUFR; 1932 1933 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1934 if (ret < 0) { 1935 netdev_warn(dev->net, "Error writing WUCSR\n"); 1936 goto done; 1937 } 1938 1939 netdev_info(dev->net, "enabling packet match detection\n"); 1940 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1941 if (ret < 0) { 1942 netdev_warn(dev->net, "Error reading WUCSR\n"); 1943 goto done; 1944 } 1945 1946 val |= WUCSR_WUEN; 1947 1948 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1949 if (ret < 0) { 1950 netdev_warn(dev->net, "Error writing WUCSR\n"); 1951 goto done; 1952 } 1953 } else { 1954 netdev_info(dev->net, "disabling packet match detection\n"); 1955 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1956 if (ret < 0) { 1957 netdev_warn(dev->net, "Error reading WUCSR\n"); 1958 goto done; 1959 } 1960 1961 val &= ~WUCSR_WUEN; 1962 1963 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1964 if (ret < 0) { 1965 netdev_warn(dev->net, "Error writing WUCSR\n"); 1966 goto done; 1967 } 1968 } 1969 1970 /* disable magic, bcast & unicast wakeup sources */ 1971 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1972 if (ret < 0) { 1973 netdev_warn(dev->net, "Error reading WUCSR\n"); 1974 goto done; 1975 } 1976 1977 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN); 1978 1979 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1980 if (ret < 0) { 1981 netdev_warn(dev->net, "Error writing WUCSR\n"); 1982 goto done; 1983 } 1984 1985 if (pdata->wolopts & WAKE_PHY) { 1986 netdev_info(dev->net, "enabling PHY wakeup\n"); 1987 1988 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1989 if (ret < 0) { 1990 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1991 goto done; 1992 } 1993 1994 /* clear wol status, enable energy detection */ 1995 val &= ~PMT_CTL_WUPS; 1996 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN); 1997 1998 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1999 if (ret < 0) { 2000 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 2001 goto done; 2002 } 2003 } 2004 2005 if (pdata->wolopts & WAKE_MAGIC) { 2006 netdev_info(dev->net, "enabling magic packet wakeup\n"); 2007 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 2008 if (ret < 0) { 2009 netdev_warn(dev->net, "Error reading WUCSR\n"); 2010 goto done; 2011 } 2012 2013 /* clear any pending magic packet status */ 2014 val |= WUCSR_MPR | WUCSR_MPEN; 2015 2016 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 2017 if (ret < 0) { 2018 netdev_warn(dev->net, "Error writing WUCSR\n"); 2019 goto done; 2020 } 2021 } 2022 2023 if (pdata->wolopts & WAKE_BCAST) { 2024 netdev_info(dev->net, "enabling broadcast detection\n"); 2025 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 2026 if (ret < 0) { 2027 netdev_warn(dev->net, "Error reading WUCSR\n"); 2028 goto done; 2029 } 2030 2031 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN; 2032 2033 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 2034 if (ret < 0) { 2035 netdev_warn(dev->net, "Error writing WUCSR\n"); 2036 goto done; 2037 } 2038 } 2039 2040 if (pdata->wolopts & WAKE_UCAST) { 2041 netdev_info(dev->net, "enabling unicast detection\n"); 2042 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 2043 if (ret < 0) { 2044 netdev_warn(dev->net, "Error reading WUCSR\n"); 2045 goto done; 2046 } 2047 2048 val |= WUCSR_WUFR | WUCSR_PFDA_EN; 2049 2050 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 2051 if (ret < 0) { 2052 netdev_warn(dev->net, "Error writing WUCSR\n"); 2053 goto done; 2054 } 2055 } 2056 2057 /* enable receiver to enable frame reception */ 2058 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val); 2059 if (ret < 0) { 2060 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret); 2061 goto done; 2062 } 2063 2064 val |= MAC_RX_RXEN; 2065 2066 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val); 2067 if (ret < 0) { 2068 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 2069 goto done; 2070 } 2071 2072 /* some wol options are enabled, so enter SUSPEND0 */ 2073 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 2074 ret = smsc75xx_enter_suspend0(dev); 2075 2076 done: 2077 /* 2078 * TODO: resume() might need to handle the suspend failure 2079 * in system sleep 2080 */ 2081 if (ret && PMSG_IS_AUTO(message)) 2082 usbnet_resume(intf); 2083 return ret; 2084 } 2085 2086 static int smsc75xx_resume(struct usb_interface *intf) 2087 { 2088 struct usbnet *dev = usb_get_intfdata(intf); 2089 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 2090 u8 suspend_flags = pdata->suspend_flags; 2091 int ret; 2092 u32 val; 2093 2094 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 2095 2096 /* do this first to ensure it's cleared even in error case */ 2097 pdata->suspend_flags = 0; 2098 2099 if (suspend_flags & SUSPEND_ALLMODES) { 2100 /* Disable wakeup sources */ 2101 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 2102 if (ret < 0) { 2103 netdev_warn(dev->net, "Error reading WUCSR\n"); 2104 return ret; 2105 } 2106 2107 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN 2108 | WUCSR_BCST_EN); 2109 2110 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 2111 if (ret < 0) { 2112 netdev_warn(dev->net, "Error writing WUCSR\n"); 2113 return ret; 2114 } 2115 2116 /* clear wake-up status */ 2117 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 2118 if (ret < 0) { 2119 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 2120 return ret; 2121 } 2122 2123 val &= ~PMT_CTL_WOL_EN; 2124 val |= PMT_CTL_WUPS; 2125 2126 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 2127 if (ret < 0) { 2128 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 2129 return ret; 2130 } 2131 } 2132 2133 if (suspend_flags & SUSPEND_SUSPEND2) { 2134 netdev_info(dev->net, "resuming from SUSPEND2\n"); 2135 2136 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 2137 if (ret < 0) { 2138 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 2139 return ret; 2140 } 2141 2142 val |= PMT_CTL_PHY_PWRUP; 2143 2144 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 2145 if (ret < 0) { 2146 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 2147 return ret; 2148 } 2149 } 2150 2151 ret = smsc75xx_wait_ready(dev, 1); 2152 if (ret < 0) { 2153 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n"); 2154 return ret; 2155 } 2156 2157 return usbnet_resume(intf); 2158 } 2159 2160 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb, 2161 u32 rx_cmd_a, u32 rx_cmd_b) 2162 { 2163 if (!(dev->net->features & NETIF_F_RXCSUM) || 2164 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) { 2165 skb->ip_summed = CHECKSUM_NONE; 2166 } else { 2167 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT)); 2168 skb->ip_summed = CHECKSUM_COMPLETE; 2169 } 2170 } 2171 2172 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 2173 { 2174 /* This check is no longer done by usbnet */ 2175 if (skb->len < dev->net->hard_header_len) 2176 return 0; 2177 2178 while (skb->len > 0) { 2179 u32 rx_cmd_a, rx_cmd_b, align_count, size; 2180 struct sk_buff *ax_skb; 2181 unsigned char *packet; 2182 2183 rx_cmd_a = get_unaligned_le32(skb->data); 2184 skb_pull(skb, 4); 2185 2186 rx_cmd_b = get_unaligned_le32(skb->data); 2187 skb_pull(skb, 4 + RXW_PADDING); 2188 2189 packet = skb->data; 2190 2191 /* get the packet length */ 2192 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING; 2193 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4; 2194 2195 if (unlikely(size > skb->len)) { 2196 netif_dbg(dev, rx_err, dev->net, 2197 "size err rx_cmd_a=0x%08x\n", 2198 rx_cmd_a); 2199 return 0; 2200 } 2201 2202 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) { 2203 netif_dbg(dev, rx_err, dev->net, 2204 "Error rx_cmd_a=0x%08x\n", rx_cmd_a); 2205 dev->net->stats.rx_errors++; 2206 dev->net->stats.rx_dropped++; 2207 2208 if (rx_cmd_a & RX_CMD_A_FCS) 2209 dev->net->stats.rx_crc_errors++; 2210 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT)) 2211 dev->net->stats.rx_frame_errors++; 2212 } else { 2213 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */ 2214 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) { 2215 netif_dbg(dev, rx_err, dev->net, 2216 "size err rx_cmd_a=0x%08x\n", 2217 rx_cmd_a); 2218 return 0; 2219 } 2220 2221 /* last frame in this batch */ 2222 if (skb->len == size) { 2223 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a, 2224 rx_cmd_b); 2225 2226 skb_trim(skb, skb->len - 4); /* remove fcs */ 2227 2228 return 1; 2229 } 2230 2231 /* Use "size - 4" to remove fcs */ 2232 ax_skb = netdev_alloc_skb_ip_align(dev->net, size - 4); 2233 if (unlikely(!ax_skb)) { 2234 netdev_warn(dev->net, "Error allocating skb\n"); 2235 return 0; 2236 } 2237 2238 skb_put(ax_skb, size - 4); 2239 memcpy(ax_skb->data, packet, size - 4); 2240 2241 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a, 2242 rx_cmd_b); 2243 2244 usbnet_skb_return(dev, ax_skb); 2245 } 2246 2247 skb_pull(skb, size); 2248 2249 /* padding bytes before the next frame starts */ 2250 if (skb->len) 2251 skb_pull(skb, align_count); 2252 } 2253 2254 return 1; 2255 } 2256 2257 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev, 2258 struct sk_buff *skb, gfp_t flags) 2259 { 2260 u32 tx_cmd_a, tx_cmd_b; 2261 void *ptr; 2262 2263 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) { 2264 dev_kfree_skb_any(skb); 2265 return NULL; 2266 } 2267 2268 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS; 2269 2270 if (skb->ip_summed == CHECKSUM_PARTIAL) 2271 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE; 2272 2273 if (skb_is_gso(skb)) { 2274 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN); 2275 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS; 2276 2277 tx_cmd_a |= TX_CMD_A_LSO; 2278 } else { 2279 tx_cmd_b = 0; 2280 } 2281 2282 ptr = skb_push(skb, 8); 2283 put_unaligned_le32(tx_cmd_a, ptr); 2284 put_unaligned_le32(tx_cmd_b, ptr + 4); 2285 2286 return skb; 2287 } 2288 2289 static int smsc75xx_manage_power(struct usbnet *dev, int on) 2290 { 2291 dev->intf->needs_remote_wakeup = on; 2292 return 0; 2293 } 2294 2295 static const struct driver_info smsc75xx_info = { 2296 .description = "smsc75xx USB 2.0 Gigabit Ethernet", 2297 .bind = smsc75xx_bind, 2298 .unbind = smsc75xx_unbind, 2299 .link_reset = smsc75xx_link_reset, 2300 .reset = smsc75xx_reset, 2301 .rx_fixup = smsc75xx_rx_fixup, 2302 .tx_fixup = smsc75xx_tx_fixup, 2303 .status = smsc75xx_status, 2304 .manage_power = smsc75xx_manage_power, 2305 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2306 }; 2307 2308 static const struct usb_device_id products[] = { 2309 { 2310 /* SMSC7500 USB Gigabit Ethernet Device */ 2311 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500), 2312 .driver_info = (unsigned long) &smsc75xx_info, 2313 }, 2314 { 2315 /* SMSC7500 USB Gigabit Ethernet Device */ 2316 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505), 2317 .driver_info = (unsigned long) &smsc75xx_info, 2318 }, 2319 { }, /* END */ 2320 }; 2321 MODULE_DEVICE_TABLE(usb, products); 2322 2323 static struct usb_driver smsc75xx_driver = { 2324 .name = SMSC_CHIPNAME, 2325 .id_table = products, 2326 .probe = usbnet_probe, 2327 .suspend = smsc75xx_suspend, 2328 .resume = smsc75xx_resume, 2329 .reset_resume = smsc75xx_resume, 2330 .disconnect = usbnet_disconnect, 2331 .disable_hub_initiated_lpm = 1, 2332 .supports_autosuspend = 1, 2333 }; 2334 2335 module_usb_driver(smsc75xx_driver); 2336 2337 MODULE_AUTHOR("Nancy Lin"); 2338 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2339 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices"); 2340 MODULE_LICENSE("GPL"); 2341