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 SMSC_DRIVER_VERSION "1.0.0" 25 #define HS_USB_PKT_SIZE (512) 26 #define FS_USB_PKT_SIZE (64) 27 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) 28 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) 29 #define DEFAULT_BULK_IN_DELAY (0x00002000) 30 #define MAX_SINGLE_PACKET_SIZE (9000) 31 #define LAN75XX_EEPROM_MAGIC (0x7500) 32 #define EEPROM_MAC_OFFSET (0x01) 33 #define DEFAULT_TX_CSUM_ENABLE (true) 34 #define DEFAULT_RX_CSUM_ENABLE (true) 35 #define SMSC75XX_INTERNAL_PHY_ID (1) 36 #define SMSC75XX_TX_OVERHEAD (8) 37 #define MAX_RX_FIFO_SIZE (20 * 1024) 38 #define MAX_TX_FIFO_SIZE (12 * 1024) 39 #define USB_VENDOR_ID_SMSC (0x0424) 40 #define USB_PRODUCT_ID_LAN7500 (0x7500) 41 #define USB_PRODUCT_ID_LAN7505 (0x7505) 42 #define RXW_PADDING 2 43 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ 44 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) 45 46 #define SUSPEND_SUSPEND0 (0x01) 47 #define SUSPEND_SUSPEND1 (0x02) 48 #define SUSPEND_SUSPEND2 (0x04) 49 #define SUSPEND_SUSPEND3 (0x08) 50 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ 51 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) 52 53 struct smsc75xx_priv { 54 struct usbnet *dev; 55 u32 rfe_ctl; 56 u32 wolopts; 57 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN]; 58 struct mutex dataport_mutex; 59 spinlock_t rfe_ctl_lock; 60 struct work_struct set_multicast; 61 u8 suspend_flags; 62 }; 63 64 struct usb_context { 65 struct usb_ctrlrequest req; 66 struct usbnet *dev; 67 }; 68 69 static bool turbo_mode = true; 70 module_param(turbo_mode, bool, 0644); 71 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); 72 73 static int smsc75xx_link_ok_nopm(struct usbnet *dev); 74 static int smsc75xx_phy_gig_workaround(struct usbnet *dev); 75 76 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index, 77 u32 *data, int in_pm) 78 { 79 u32 buf; 80 int ret; 81 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); 82 83 BUG_ON(!dev); 84 85 if (!in_pm) 86 fn = usbnet_read_cmd; 87 else 88 fn = usbnet_read_cmd_nopm; 89 90 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN 91 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 92 0, index, &buf, 4); 93 if (unlikely(ret < 0)) { 94 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", 95 index, ret); 96 return ret; 97 } 98 99 le32_to_cpus(&buf); 100 *data = buf; 101 102 return ret; 103 } 104 105 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index, 106 u32 data, int in_pm) 107 { 108 u32 buf; 109 int ret; 110 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); 111 112 BUG_ON(!dev); 113 114 if (!in_pm) 115 fn = usbnet_write_cmd; 116 else 117 fn = usbnet_write_cmd_nopm; 118 119 buf = data; 120 cpu_to_le32s(&buf); 121 122 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT 123 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 124 0, index, &buf, 4); 125 if (unlikely(ret < 0)) 126 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", 127 index, ret); 128 129 return ret; 130 } 131 132 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index, 133 u32 *data) 134 { 135 return __smsc75xx_read_reg(dev, index, data, 1); 136 } 137 138 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index, 139 u32 data) 140 { 141 return __smsc75xx_write_reg(dev, index, data, 1); 142 } 143 144 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index, 145 u32 *data) 146 { 147 return __smsc75xx_read_reg(dev, index, data, 0); 148 } 149 150 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index, 151 u32 data) 152 { 153 return __smsc75xx_write_reg(dev, index, data, 0); 154 } 155 156 /* Loop until the read is completed with timeout 157 * called with phy_mutex held */ 158 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev, 159 int in_pm) 160 { 161 unsigned long start_time = jiffies; 162 u32 val; 163 int ret; 164 165 do { 166 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm); 167 if (ret < 0) { 168 netdev_warn(dev->net, "Error reading MII_ACCESS\n"); 169 return ret; 170 } 171 172 if (!(val & MII_ACCESS_BUSY)) 173 return 0; 174 } while (!time_after(jiffies, start_time + HZ)); 175 176 return -EIO; 177 } 178 179 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx, 180 int in_pm) 181 { 182 struct usbnet *dev = netdev_priv(netdev); 183 u32 val, addr; 184 int ret; 185 186 mutex_lock(&dev->phy_mutex); 187 188 /* confirm MII not busy */ 189 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm); 190 if (ret < 0) { 191 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n"); 192 goto done; 193 } 194 195 /* set the address, index & direction (read from PHY) */ 196 phy_id &= dev->mii.phy_id_mask; 197 idx &= dev->mii.reg_num_mask; 198 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR) 199 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR) 200 | MII_ACCESS_READ | MII_ACCESS_BUSY; 201 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm); 202 if (ret < 0) { 203 netdev_warn(dev->net, "Error writing MII_ACCESS\n"); 204 goto done; 205 } 206 207 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm); 208 if (ret < 0) { 209 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); 210 goto done; 211 } 212 213 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm); 214 if (ret < 0) { 215 netdev_warn(dev->net, "Error reading MII_DATA\n"); 216 goto done; 217 } 218 219 ret = (u16)(val & 0xFFFF); 220 221 done: 222 mutex_unlock(&dev->phy_mutex); 223 return ret; 224 } 225 226 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id, 227 int idx, int regval, int in_pm) 228 { 229 struct usbnet *dev = netdev_priv(netdev); 230 u32 val, addr; 231 int ret; 232 233 mutex_lock(&dev->phy_mutex); 234 235 /* confirm MII not busy */ 236 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm); 237 if (ret < 0) { 238 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n"); 239 goto done; 240 } 241 242 val = regval; 243 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm); 244 if (ret < 0) { 245 netdev_warn(dev->net, "Error writing MII_DATA\n"); 246 goto done; 247 } 248 249 /* set the address, index & direction (write to PHY) */ 250 phy_id &= dev->mii.phy_id_mask; 251 idx &= dev->mii.reg_num_mask; 252 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR) 253 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR) 254 | MII_ACCESS_WRITE | MII_ACCESS_BUSY; 255 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm); 256 if (ret < 0) { 257 netdev_warn(dev->net, "Error writing MII_ACCESS\n"); 258 goto done; 259 } 260 261 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm); 262 if (ret < 0) { 263 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); 264 goto done; 265 } 266 267 done: 268 mutex_unlock(&dev->phy_mutex); 269 } 270 271 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id, 272 int idx) 273 { 274 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1); 275 } 276 277 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id, 278 int idx, int regval) 279 { 280 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1); 281 } 282 283 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx) 284 { 285 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0); 286 } 287 288 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx, 289 int regval) 290 { 291 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0); 292 } 293 294 static int smsc75xx_wait_eeprom(struct usbnet *dev) 295 { 296 unsigned long start_time = jiffies; 297 u32 val; 298 int ret; 299 300 do { 301 ret = smsc75xx_read_reg(dev, E2P_CMD, &val); 302 if (ret < 0) { 303 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 304 return ret; 305 } 306 307 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT)) 308 break; 309 udelay(40); 310 } while (!time_after(jiffies, start_time + HZ)); 311 312 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) { 313 netdev_warn(dev->net, "EEPROM read operation timeout\n"); 314 return -EIO; 315 } 316 317 return 0; 318 } 319 320 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev) 321 { 322 unsigned long start_time = jiffies; 323 u32 val; 324 int ret; 325 326 do { 327 ret = smsc75xx_read_reg(dev, E2P_CMD, &val); 328 if (ret < 0) { 329 netdev_warn(dev->net, "Error reading E2P_CMD\n"); 330 return ret; 331 } 332 333 if (!(val & E2P_CMD_BUSY)) 334 return 0; 335 336 udelay(40); 337 } while (!time_after(jiffies, start_time + HZ)); 338 339 netdev_warn(dev->net, "EEPROM is busy\n"); 340 return -EIO; 341 } 342 343 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, 344 u8 *data) 345 { 346 u32 val; 347 int i, ret; 348 349 BUG_ON(!dev); 350 BUG_ON(!data); 351 352 ret = smsc75xx_eeprom_confirm_not_busy(dev); 353 if (ret) 354 return ret; 355 356 for (i = 0; i < length; i++) { 357 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR); 358 ret = smsc75xx_write_reg(dev, E2P_CMD, val); 359 if (ret < 0) { 360 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 361 return ret; 362 } 363 364 ret = smsc75xx_wait_eeprom(dev); 365 if (ret < 0) 366 return ret; 367 368 ret = smsc75xx_read_reg(dev, E2P_DATA, &val); 369 if (ret < 0) { 370 netdev_warn(dev->net, "Error reading E2P_DATA\n"); 371 return ret; 372 } 373 374 data[i] = val & 0xFF; 375 offset++; 376 } 377 378 return 0; 379 } 380 381 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, 382 u8 *data) 383 { 384 u32 val; 385 int i, ret; 386 387 BUG_ON(!dev); 388 BUG_ON(!data); 389 390 ret = smsc75xx_eeprom_confirm_not_busy(dev); 391 if (ret) 392 return ret; 393 394 /* Issue write/erase enable command */ 395 val = E2P_CMD_BUSY | E2P_CMD_EWEN; 396 ret = smsc75xx_write_reg(dev, E2P_CMD, val); 397 if (ret < 0) { 398 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 399 return ret; 400 } 401 402 ret = smsc75xx_wait_eeprom(dev); 403 if (ret < 0) 404 return ret; 405 406 for (i = 0; i < length; i++) { 407 408 /* Fill data register */ 409 val = data[i]; 410 ret = smsc75xx_write_reg(dev, E2P_DATA, val); 411 if (ret < 0) { 412 netdev_warn(dev->net, "Error writing E2P_DATA\n"); 413 return ret; 414 } 415 416 /* Send "write" command */ 417 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR); 418 ret = smsc75xx_write_reg(dev, E2P_CMD, val); 419 if (ret < 0) { 420 netdev_warn(dev->net, "Error writing E2P_CMD\n"); 421 return ret; 422 } 423 424 ret = smsc75xx_wait_eeprom(dev); 425 if (ret < 0) 426 return ret; 427 428 offset++; 429 } 430 431 return 0; 432 } 433 434 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev) 435 { 436 int i, ret; 437 438 for (i = 0; i < 100; i++) { 439 u32 dp_sel; 440 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel); 441 if (ret < 0) { 442 netdev_warn(dev->net, "Error reading DP_SEL\n"); 443 return ret; 444 } 445 446 if (dp_sel & DP_SEL_DPRDY) 447 return 0; 448 449 udelay(40); 450 } 451 452 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n"); 453 454 return -EIO; 455 } 456 457 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr, 458 u32 length, u32 *buf) 459 { 460 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 461 u32 dp_sel; 462 int i, ret; 463 464 mutex_lock(&pdata->dataport_mutex); 465 466 ret = smsc75xx_dataport_wait_not_busy(dev); 467 if (ret < 0) { 468 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n"); 469 goto done; 470 } 471 472 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel); 473 if (ret < 0) { 474 netdev_warn(dev->net, "Error reading DP_SEL\n"); 475 goto done; 476 } 477 478 dp_sel &= ~DP_SEL_RSEL; 479 dp_sel |= ram_select; 480 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel); 481 if (ret < 0) { 482 netdev_warn(dev->net, "Error writing DP_SEL\n"); 483 goto done; 484 } 485 486 for (i = 0; i < length; i++) { 487 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i); 488 if (ret < 0) { 489 netdev_warn(dev->net, "Error writing DP_ADDR\n"); 490 goto done; 491 } 492 493 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]); 494 if (ret < 0) { 495 netdev_warn(dev->net, "Error writing DP_DATA\n"); 496 goto done; 497 } 498 499 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE); 500 if (ret < 0) { 501 netdev_warn(dev->net, "Error writing DP_CMD\n"); 502 goto done; 503 } 504 505 ret = smsc75xx_dataport_wait_not_busy(dev); 506 if (ret < 0) { 507 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n"); 508 goto done; 509 } 510 } 511 512 done: 513 mutex_unlock(&pdata->dataport_mutex); 514 return ret; 515 } 516 517 /* returns hash bit number for given MAC address */ 518 static u32 smsc75xx_hash(char addr[ETH_ALEN]) 519 { 520 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff; 521 } 522 523 static void smsc75xx_deferred_multicast_write(struct work_struct *param) 524 { 525 struct smsc75xx_priv *pdata = 526 container_of(param, struct smsc75xx_priv, set_multicast); 527 struct usbnet *dev = pdata->dev; 528 int ret; 529 530 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n", 531 pdata->rfe_ctl); 532 533 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN, 534 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table); 535 536 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 537 if (ret < 0) 538 netdev_warn(dev->net, "Error writing RFE_CRL\n"); 539 } 540 541 static void smsc75xx_set_multicast(struct net_device *netdev) 542 { 543 struct usbnet *dev = netdev_priv(netdev); 544 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 545 unsigned long flags; 546 int i; 547 548 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); 549 550 pdata->rfe_ctl &= 551 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF); 552 pdata->rfe_ctl |= RFE_CTL_AB; 553 554 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++) 555 pdata->multicast_hash_table[i] = 0; 556 557 if (dev->net->flags & IFF_PROMISC) { 558 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); 559 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU; 560 } else if (dev->net->flags & IFF_ALLMULTI) { 561 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); 562 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF; 563 } else if (!netdev_mc_empty(dev->net)) { 564 struct netdev_hw_addr *ha; 565 566 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n"); 567 568 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF; 569 570 netdev_for_each_mc_addr(ha, netdev) { 571 u32 bitnum = smsc75xx_hash(ha->addr); 572 pdata->multicast_hash_table[bitnum / 32] |= 573 (1 << (bitnum % 32)); 574 } 575 } else { 576 netif_dbg(dev, drv, dev->net, "receive own packets only\n"); 577 pdata->rfe_ctl |= RFE_CTL_DPF; 578 } 579 580 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); 581 582 /* defer register writes to a sleepable context */ 583 schedule_work(&pdata->set_multicast); 584 } 585 586 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex, 587 u16 lcladv, u16 rmtadv) 588 { 589 u32 flow = 0, fct_flow = 0; 590 int ret; 591 592 if (duplex == DUPLEX_FULL) { 593 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 594 595 if (cap & FLOW_CTRL_TX) { 596 flow = (FLOW_TX_FCEN | 0xFFFF); 597 /* set fct_flow thresholds to 20% and 80% */ 598 fct_flow = (8 << 8) | 32; 599 } 600 601 if (cap & FLOW_CTRL_RX) 602 flow |= FLOW_RX_FCEN; 603 604 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", 605 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), 606 (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); 607 } else { 608 netif_dbg(dev, link, dev->net, "half duplex\n"); 609 } 610 611 ret = smsc75xx_write_reg(dev, FLOW, flow); 612 if (ret < 0) { 613 netdev_warn(dev->net, "Error writing FLOW\n"); 614 return ret; 615 } 616 617 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow); 618 if (ret < 0) { 619 netdev_warn(dev->net, "Error writing FCT_FLOW\n"); 620 return ret; 621 } 622 623 return 0; 624 } 625 626 static int smsc75xx_link_reset(struct usbnet *dev) 627 { 628 struct mii_if_info *mii = &dev->mii; 629 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; 630 u16 lcladv, rmtadv; 631 int ret; 632 633 /* write to clear phy interrupt status */ 634 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC, 635 PHY_INT_SRC_CLEAR_ALL); 636 637 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL); 638 if (ret < 0) { 639 netdev_warn(dev->net, "Error writing INT_STS\n"); 640 return ret; 641 } 642 643 mii_check_media(mii, 1, 1); 644 mii_ethtool_gset(&dev->mii, &ecmd); 645 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE); 646 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA); 647 648 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n", 649 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv); 650 651 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv); 652 } 653 654 static void smsc75xx_status(struct usbnet *dev, struct urb *urb) 655 { 656 u32 intdata; 657 658 if (urb->actual_length != 4) { 659 netdev_warn(dev->net, "unexpected urb length %d\n", 660 urb->actual_length); 661 return; 662 } 663 664 memcpy(&intdata, urb->transfer_buffer, 4); 665 le32_to_cpus(&intdata); 666 667 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 668 669 if (intdata & INT_ENP_PHY_INT) 670 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 671 else 672 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 673 intdata); 674 } 675 676 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net) 677 { 678 return MAX_EEPROM_SIZE; 679 } 680 681 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev, 682 struct ethtool_eeprom *ee, u8 *data) 683 { 684 struct usbnet *dev = netdev_priv(netdev); 685 686 ee->magic = LAN75XX_EEPROM_MAGIC; 687 688 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data); 689 } 690 691 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev, 692 struct ethtool_eeprom *ee, u8 *data) 693 { 694 struct usbnet *dev = netdev_priv(netdev); 695 696 if (ee->magic != LAN75XX_EEPROM_MAGIC) { 697 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n", 698 ee->magic); 699 return -EINVAL; 700 } 701 702 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data); 703 } 704 705 static void smsc75xx_ethtool_get_wol(struct net_device *net, 706 struct ethtool_wolinfo *wolinfo) 707 { 708 struct usbnet *dev = netdev_priv(net); 709 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 710 711 wolinfo->supported = SUPPORTED_WAKE; 712 wolinfo->wolopts = pdata->wolopts; 713 } 714 715 static int smsc75xx_ethtool_set_wol(struct net_device *net, 716 struct ethtool_wolinfo *wolinfo) 717 { 718 struct usbnet *dev = netdev_priv(net); 719 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 720 int ret; 721 722 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 723 return -EINVAL; 724 725 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 726 727 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 728 if (ret < 0) 729 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 730 731 return ret; 732 } 733 734 static const struct ethtool_ops smsc75xx_ethtool_ops = { 735 .get_link = usbnet_get_link, 736 .nway_reset = usbnet_nway_reset, 737 .get_drvinfo = usbnet_get_drvinfo, 738 .get_msglevel = usbnet_get_msglevel, 739 .set_msglevel = usbnet_set_msglevel, 740 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len, 741 .get_eeprom = smsc75xx_ethtool_get_eeprom, 742 .set_eeprom = smsc75xx_ethtool_set_eeprom, 743 .get_wol = smsc75xx_ethtool_get_wol, 744 .set_wol = smsc75xx_ethtool_set_wol, 745 .get_link_ksettings = usbnet_get_link_ksettings, 746 .set_link_ksettings = usbnet_set_link_ksettings, 747 }; 748 749 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 750 { 751 struct usbnet *dev = netdev_priv(netdev); 752 753 if (!netif_running(netdev)) 754 return -EINVAL; 755 756 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 757 } 758 759 static void smsc75xx_init_mac_address(struct usbnet *dev) 760 { 761 const u8 *mac_addr; 762 763 /* maybe the boot loader passed the MAC address in devicetree */ 764 mac_addr = of_get_mac_address(dev->udev->dev.of_node); 765 if (!IS_ERR(mac_addr)) { 766 ether_addr_copy(dev->net->dev_addr, mac_addr); 767 return; 768 } 769 770 /* try reading mac address from EEPROM */ 771 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 772 dev->net->dev_addr) == 0) { 773 if (is_valid_ether_addr(dev->net->dev_addr)) { 774 /* eeprom values are valid so use them */ 775 netif_dbg(dev, ifup, dev->net, 776 "MAC address read from EEPROM\n"); 777 return; 778 } 779 } 780 781 /* no useful static MAC address found. generate a random one */ 782 eth_hw_addr_random(dev->net); 783 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 784 } 785 786 static int smsc75xx_set_mac_address(struct usbnet *dev) 787 { 788 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 789 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 790 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 791 792 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi); 793 if (ret < 0) { 794 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret); 795 return ret; 796 } 797 798 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo); 799 if (ret < 0) { 800 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret); 801 return ret; 802 } 803 804 addr_hi |= ADDR_FILTX_FB_VALID; 805 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi); 806 if (ret < 0) { 807 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret); 808 return ret; 809 } 810 811 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo); 812 if (ret < 0) 813 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret); 814 815 return ret; 816 } 817 818 static int smsc75xx_phy_initialize(struct usbnet *dev) 819 { 820 int bmcr, ret, timeout = 0; 821 822 /* Initialize MII structure */ 823 dev->mii.dev = dev->net; 824 dev->mii.mdio_read = smsc75xx_mdio_read; 825 dev->mii.mdio_write = smsc75xx_mdio_write; 826 dev->mii.phy_id_mask = 0x1f; 827 dev->mii.reg_num_mask = 0x1f; 828 dev->mii.supports_gmii = 1; 829 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID; 830 831 /* reset phy and wait for reset to complete */ 832 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 833 834 do { 835 msleep(10); 836 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR); 837 if (bmcr < 0) { 838 netdev_warn(dev->net, "Error reading MII_BMCR\n"); 839 return bmcr; 840 } 841 timeout++; 842 } while ((bmcr & BMCR_RESET) && (timeout < 100)); 843 844 if (timeout >= 100) { 845 netdev_warn(dev->net, "timeout on PHY Reset\n"); 846 return -EIO; 847 } 848 849 /* phy workaround for gig link */ 850 smsc75xx_phy_gig_workaround(dev); 851 852 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 853 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | 854 ADVERTISE_PAUSE_ASYM); 855 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000, 856 ADVERTISE_1000FULL); 857 858 /* read and write to clear phy interrupt status */ 859 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); 860 if (ret < 0) { 861 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n"); 862 return ret; 863 } 864 865 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff); 866 867 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, 868 PHY_INT_MASK_DEFAULT); 869 mii_nway_restart(&dev->mii); 870 871 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n"); 872 return 0; 873 } 874 875 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size) 876 { 877 int ret = 0; 878 u32 buf; 879 bool rxenabled; 880 881 ret = smsc75xx_read_reg(dev, MAC_RX, &buf); 882 if (ret < 0) { 883 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret); 884 return ret; 885 } 886 887 rxenabled = ((buf & MAC_RX_RXEN) != 0); 888 889 if (rxenabled) { 890 buf &= ~MAC_RX_RXEN; 891 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 892 if (ret < 0) { 893 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 894 return ret; 895 } 896 } 897 898 /* add 4 to size for FCS */ 899 buf &= ~MAC_RX_MAX_SIZE; 900 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE); 901 902 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 903 if (ret < 0) { 904 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 905 return ret; 906 } 907 908 if (rxenabled) { 909 buf |= MAC_RX_RXEN; 910 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 911 if (ret < 0) { 912 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 913 return ret; 914 } 915 } 916 917 return 0; 918 } 919 920 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu) 921 { 922 struct usbnet *dev = netdev_priv(netdev); 923 int ret; 924 925 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN); 926 if (ret < 0) { 927 netdev_warn(dev->net, "Failed to set mac rx frame length\n"); 928 return ret; 929 } 930 931 return usbnet_change_mtu(netdev, new_mtu); 932 } 933 934 /* Enable or disable Rx checksum offload engine */ 935 static int smsc75xx_set_features(struct net_device *netdev, 936 netdev_features_t features) 937 { 938 struct usbnet *dev = netdev_priv(netdev); 939 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 940 unsigned long flags; 941 int ret; 942 943 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); 944 945 if (features & NETIF_F_RXCSUM) 946 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM; 947 else 948 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM); 949 950 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); 951 /* it's racing here! */ 952 953 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 954 if (ret < 0) { 955 netdev_warn(dev->net, "Error writing RFE_CTL\n"); 956 return ret; 957 } 958 return 0; 959 } 960 961 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm) 962 { 963 int timeout = 0; 964 965 do { 966 u32 buf; 967 int ret; 968 969 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm); 970 971 if (ret < 0) { 972 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 973 return ret; 974 } 975 976 if (buf & PMT_CTL_DEV_RDY) 977 return 0; 978 979 msleep(10); 980 timeout++; 981 } while (timeout < 100); 982 983 netdev_warn(dev->net, "timeout waiting for device ready\n"); 984 return -EIO; 985 } 986 987 static int smsc75xx_phy_gig_workaround(struct usbnet *dev) 988 { 989 struct mii_if_info *mii = &dev->mii; 990 int ret = 0, timeout = 0; 991 u32 buf, link_up = 0; 992 993 /* Set the phy in Gig loopback */ 994 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040); 995 996 /* Wait for the link up */ 997 do { 998 link_up = smsc75xx_link_ok_nopm(dev); 999 usleep_range(10000, 20000); 1000 timeout++; 1001 } while ((!link_up) && (timeout < 1000)); 1002 1003 if (timeout >= 1000) { 1004 netdev_warn(dev->net, "Timeout waiting for PHY link up\n"); 1005 return -EIO; 1006 } 1007 1008 /* phy reset */ 1009 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1010 if (ret < 0) { 1011 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1012 return ret; 1013 } 1014 1015 buf |= PMT_CTL_PHY_RST; 1016 1017 ret = smsc75xx_write_reg(dev, PMT_CTL, buf); 1018 if (ret < 0) { 1019 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret); 1020 return ret; 1021 } 1022 1023 timeout = 0; 1024 do { 1025 usleep_range(10000, 20000); 1026 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1027 if (ret < 0) { 1028 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", 1029 ret); 1030 return ret; 1031 } 1032 timeout++; 1033 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100)); 1034 1035 if (timeout >= 100) { 1036 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1037 return -EIO; 1038 } 1039 1040 return 0; 1041 } 1042 1043 static int smsc75xx_reset(struct usbnet *dev) 1044 { 1045 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1046 u32 buf; 1047 int ret = 0, timeout; 1048 1049 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n"); 1050 1051 ret = smsc75xx_wait_ready(dev, 0); 1052 if (ret < 0) { 1053 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n"); 1054 return ret; 1055 } 1056 1057 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1058 if (ret < 0) { 1059 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1060 return ret; 1061 } 1062 1063 buf |= HW_CFG_LRST; 1064 1065 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1066 if (ret < 0) { 1067 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1068 return ret; 1069 } 1070 1071 timeout = 0; 1072 do { 1073 msleep(10); 1074 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1075 if (ret < 0) { 1076 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1077 return ret; 1078 } 1079 timeout++; 1080 } while ((buf & HW_CFG_LRST) && (timeout < 100)); 1081 1082 if (timeout >= 100) { 1083 netdev_warn(dev->net, "timeout on completion of Lite Reset\n"); 1084 return -EIO; 1085 } 1086 1087 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n"); 1088 1089 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1090 if (ret < 0) { 1091 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1092 return ret; 1093 } 1094 1095 buf |= PMT_CTL_PHY_RST; 1096 1097 ret = smsc75xx_write_reg(dev, PMT_CTL, buf); 1098 if (ret < 0) { 1099 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret); 1100 return ret; 1101 } 1102 1103 timeout = 0; 1104 do { 1105 msleep(10); 1106 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1107 if (ret < 0) { 1108 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1109 return ret; 1110 } 1111 timeout++; 1112 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100)); 1113 1114 if (timeout >= 100) { 1115 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1116 return -EIO; 1117 } 1118 1119 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n"); 1120 1121 ret = smsc75xx_set_mac_address(dev); 1122 if (ret < 0) { 1123 netdev_warn(dev->net, "Failed to set mac address\n"); 1124 return ret; 1125 } 1126 1127 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 1128 dev->net->dev_addr); 1129 1130 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1131 if (ret < 0) { 1132 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1133 return ret; 1134 } 1135 1136 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 1137 buf); 1138 1139 buf |= HW_CFG_BIR; 1140 1141 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1142 if (ret < 0) { 1143 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1144 return ret; 1145 } 1146 1147 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1148 if (ret < 0) { 1149 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1150 return ret; 1151 } 1152 1153 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n", 1154 buf); 1155 1156 if (!turbo_mode) { 1157 buf = 0; 1158 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 1159 } else if (dev->udev->speed == USB_SPEED_HIGH) { 1160 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 1161 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 1162 } else { 1163 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 1164 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 1165 } 1166 1167 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 1168 (ulong)dev->rx_urb_size); 1169 1170 ret = smsc75xx_write_reg(dev, BURST_CAP, buf); 1171 if (ret < 0) { 1172 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret); 1173 return ret; 1174 } 1175 1176 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf); 1177 if (ret < 0) { 1178 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret); 1179 return ret; 1180 } 1181 1182 netif_dbg(dev, ifup, dev->net, 1183 "Read Value from BURST_CAP after writing: 0x%08x\n", buf); 1184 1185 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1186 if (ret < 0) { 1187 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret); 1188 return ret; 1189 } 1190 1191 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf); 1192 if (ret < 0) { 1193 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret); 1194 return ret; 1195 } 1196 1197 netif_dbg(dev, ifup, dev->net, 1198 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf); 1199 1200 if (turbo_mode) { 1201 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1202 if (ret < 0) { 1203 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1204 return ret; 1205 } 1206 1207 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf); 1208 1209 buf |= (HW_CFG_MEF | HW_CFG_BCE); 1210 1211 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1212 if (ret < 0) { 1213 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1214 return ret; 1215 } 1216 1217 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1218 if (ret < 0) { 1219 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1220 return ret; 1221 } 1222 1223 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf); 1224 } 1225 1226 /* set FIFO sizes */ 1227 buf = (MAX_RX_FIFO_SIZE - 512) / 512; 1228 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf); 1229 if (ret < 0) { 1230 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret); 1231 return ret; 1232 } 1233 1234 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf); 1235 1236 buf = (MAX_TX_FIFO_SIZE - 512) / 512; 1237 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf); 1238 if (ret < 0) { 1239 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret); 1240 return ret; 1241 } 1242 1243 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf); 1244 1245 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL); 1246 if (ret < 0) { 1247 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret); 1248 return ret; 1249 } 1250 1251 ret = smsc75xx_read_reg(dev, ID_REV, &buf); 1252 if (ret < 0) { 1253 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret); 1254 return ret; 1255 } 1256 1257 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf); 1258 1259 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf); 1260 if (ret < 0) { 1261 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret); 1262 return ret; 1263 } 1264 1265 /* only set default GPIO/LED settings if no EEPROM is detected */ 1266 if (!(buf & E2P_CMD_LOADED)) { 1267 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf); 1268 if (ret < 0) { 1269 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret); 1270 return ret; 1271 } 1272 1273 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL); 1274 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL; 1275 1276 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf); 1277 if (ret < 0) { 1278 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret); 1279 return ret; 1280 } 1281 } 1282 1283 ret = smsc75xx_write_reg(dev, FLOW, 0); 1284 if (ret < 0) { 1285 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret); 1286 return ret; 1287 } 1288 1289 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0); 1290 if (ret < 0) { 1291 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret); 1292 return ret; 1293 } 1294 1295 /* Don't need rfe_ctl_lock during initialisation */ 1296 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); 1297 if (ret < 0) { 1298 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret); 1299 return ret; 1300 } 1301 1302 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF; 1303 1304 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 1305 if (ret < 0) { 1306 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret); 1307 return ret; 1308 } 1309 1310 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); 1311 if (ret < 0) { 1312 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret); 1313 return ret; 1314 } 1315 1316 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n", 1317 pdata->rfe_ctl); 1318 1319 /* Enable or disable checksum offload engines */ 1320 smsc75xx_set_features(dev->net, dev->net->features); 1321 1322 smsc75xx_set_multicast(dev->net); 1323 1324 ret = smsc75xx_phy_initialize(dev); 1325 if (ret < 0) { 1326 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret); 1327 return ret; 1328 } 1329 1330 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf); 1331 if (ret < 0) { 1332 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret); 1333 return ret; 1334 } 1335 1336 /* enable PHY interrupts */ 1337 buf |= INT_ENP_PHY_INT; 1338 1339 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf); 1340 if (ret < 0) { 1341 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret); 1342 return ret; 1343 } 1344 1345 /* allow mac to detect speed and duplex from phy */ 1346 ret = smsc75xx_read_reg(dev, MAC_CR, &buf); 1347 if (ret < 0) { 1348 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret); 1349 return ret; 1350 } 1351 1352 buf |= (MAC_CR_ADD | MAC_CR_ASD); 1353 ret = smsc75xx_write_reg(dev, MAC_CR, buf); 1354 if (ret < 0) { 1355 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret); 1356 return ret; 1357 } 1358 1359 ret = smsc75xx_read_reg(dev, MAC_TX, &buf); 1360 if (ret < 0) { 1361 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret); 1362 return ret; 1363 } 1364 1365 buf |= MAC_TX_TXEN; 1366 1367 ret = smsc75xx_write_reg(dev, MAC_TX, buf); 1368 if (ret < 0) { 1369 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret); 1370 return ret; 1371 } 1372 1373 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf); 1374 1375 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf); 1376 if (ret < 0) { 1377 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret); 1378 return ret; 1379 } 1380 1381 buf |= FCT_TX_CTL_EN; 1382 1383 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf); 1384 if (ret < 0) { 1385 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret); 1386 return ret; 1387 } 1388 1389 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf); 1390 1391 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN); 1392 if (ret < 0) { 1393 netdev_warn(dev->net, "Failed to set max rx frame length\n"); 1394 return ret; 1395 } 1396 1397 ret = smsc75xx_read_reg(dev, MAC_RX, &buf); 1398 if (ret < 0) { 1399 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret); 1400 return ret; 1401 } 1402 1403 buf |= MAC_RX_RXEN; 1404 1405 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 1406 if (ret < 0) { 1407 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 1408 return ret; 1409 } 1410 1411 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf); 1412 1413 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf); 1414 if (ret < 0) { 1415 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret); 1416 return ret; 1417 } 1418 1419 buf |= FCT_RX_CTL_EN; 1420 1421 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf); 1422 if (ret < 0) { 1423 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret); 1424 return ret; 1425 } 1426 1427 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf); 1428 1429 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n"); 1430 return 0; 1431 } 1432 1433 static const struct net_device_ops smsc75xx_netdev_ops = { 1434 .ndo_open = usbnet_open, 1435 .ndo_stop = usbnet_stop, 1436 .ndo_start_xmit = usbnet_start_xmit, 1437 .ndo_tx_timeout = usbnet_tx_timeout, 1438 .ndo_get_stats64 = usbnet_get_stats64, 1439 .ndo_change_mtu = smsc75xx_change_mtu, 1440 .ndo_set_mac_address = eth_mac_addr, 1441 .ndo_validate_addr = eth_validate_addr, 1442 .ndo_do_ioctl = smsc75xx_ioctl, 1443 .ndo_set_rx_mode = smsc75xx_set_multicast, 1444 .ndo_set_features = smsc75xx_set_features, 1445 }; 1446 1447 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf) 1448 { 1449 struct smsc75xx_priv *pdata = NULL; 1450 int ret; 1451 1452 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1453 1454 ret = usbnet_get_endpoints(dev, intf); 1455 if (ret < 0) { 1456 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1457 return ret; 1458 } 1459 1460 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv), 1461 GFP_KERNEL); 1462 1463 pdata = (struct smsc75xx_priv *)(dev->data[0]); 1464 if (!pdata) 1465 return -ENOMEM; 1466 1467 pdata->dev = dev; 1468 1469 spin_lock_init(&pdata->rfe_ctl_lock); 1470 mutex_init(&pdata->dataport_mutex); 1471 1472 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write); 1473 1474 if (DEFAULT_TX_CSUM_ENABLE) 1475 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1476 1477 if (DEFAULT_RX_CSUM_ENABLE) 1478 dev->net->features |= NETIF_F_RXCSUM; 1479 1480 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 1481 NETIF_F_RXCSUM; 1482 1483 ret = smsc75xx_wait_ready(dev, 0); 1484 if (ret < 0) { 1485 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n"); 1486 return ret; 1487 } 1488 1489 smsc75xx_init_mac_address(dev); 1490 1491 /* Init all registers */ 1492 ret = smsc75xx_reset(dev); 1493 if (ret < 0) { 1494 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret); 1495 return ret; 1496 } 1497 1498 dev->net->netdev_ops = &smsc75xx_netdev_ops; 1499 dev->net->ethtool_ops = &smsc75xx_ethtool_ops; 1500 dev->net->flags |= IFF_MULTICAST; 1501 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD; 1502 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1503 dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE; 1504 return 0; 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 pdata = NULL; 1515 dev->data[0] = 0; 1516 } 1517 } 1518 1519 static u16 smsc_crc(const u8 *buffer, size_t len) 1520 { 1521 return bitrev16(crc16(0xFFFF, buffer, len)); 1522 } 1523 1524 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg, 1525 u32 wuf_mask1) 1526 { 1527 int cfg_base = WUF_CFGX + filter * 4; 1528 int mask_base = WUF_MASKX + filter * 16; 1529 int ret; 1530 1531 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg); 1532 if (ret < 0) { 1533 netdev_warn(dev->net, "Error writing WUF_CFGX\n"); 1534 return ret; 1535 } 1536 1537 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1); 1538 if (ret < 0) { 1539 netdev_warn(dev->net, "Error writing WUF_MASKX\n"); 1540 return ret; 1541 } 1542 1543 ret = smsc75xx_write_reg(dev, mask_base + 4, 0); 1544 if (ret < 0) { 1545 netdev_warn(dev->net, "Error writing WUF_MASKX\n"); 1546 return ret; 1547 } 1548 1549 ret = smsc75xx_write_reg(dev, mask_base + 8, 0); 1550 if (ret < 0) { 1551 netdev_warn(dev->net, "Error writing WUF_MASKX\n"); 1552 return ret; 1553 } 1554 1555 ret = smsc75xx_write_reg(dev, mask_base + 12, 0); 1556 if (ret < 0) { 1557 netdev_warn(dev->net, "Error writing WUF_MASKX\n"); 1558 return ret; 1559 } 1560 1561 return 0; 1562 } 1563 1564 static int smsc75xx_enter_suspend0(struct usbnet *dev) 1565 { 1566 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1567 u32 val; 1568 int ret; 1569 1570 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1571 if (ret < 0) { 1572 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1573 return ret; 1574 } 1575 1576 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST)); 1577 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS; 1578 1579 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1580 if (ret < 0) { 1581 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1582 return ret; 1583 } 1584 1585 pdata->suspend_flags |= SUSPEND_SUSPEND0; 1586 1587 return 0; 1588 } 1589 1590 static int smsc75xx_enter_suspend1(struct usbnet *dev) 1591 { 1592 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1593 u32 val; 1594 int ret; 1595 1596 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1597 if (ret < 0) { 1598 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1599 return ret; 1600 } 1601 1602 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST); 1603 val |= PMT_CTL_SUS_MODE_1; 1604 1605 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1606 if (ret < 0) { 1607 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1608 return ret; 1609 } 1610 1611 /* clear wol status, enable energy detection */ 1612 val &= ~PMT_CTL_WUPS; 1613 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN); 1614 1615 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1616 if (ret < 0) { 1617 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1618 return ret; 1619 } 1620 1621 pdata->suspend_flags |= SUSPEND_SUSPEND1; 1622 1623 return 0; 1624 } 1625 1626 static int smsc75xx_enter_suspend2(struct usbnet *dev) 1627 { 1628 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1629 u32 val; 1630 int ret; 1631 1632 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1633 if (ret < 0) { 1634 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1635 return ret; 1636 } 1637 1638 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST); 1639 val |= PMT_CTL_SUS_MODE_2; 1640 1641 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1642 if (ret < 0) { 1643 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1644 return ret; 1645 } 1646 1647 pdata->suspend_flags |= SUSPEND_SUSPEND2; 1648 1649 return 0; 1650 } 1651 1652 static int smsc75xx_enter_suspend3(struct usbnet *dev) 1653 { 1654 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1655 u32 val; 1656 int ret; 1657 1658 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val); 1659 if (ret < 0) { 1660 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n"); 1661 return ret; 1662 } 1663 1664 if (val & FCT_RX_CTL_RXUSED) { 1665 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n"); 1666 return -EBUSY; 1667 } 1668 1669 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1670 if (ret < 0) { 1671 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1672 return ret; 1673 } 1674 1675 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST); 1676 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN; 1677 1678 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1679 if (ret < 0) { 1680 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1681 return ret; 1682 } 1683 1684 /* clear wol status */ 1685 val &= ~PMT_CTL_WUPS; 1686 val |= PMT_CTL_WUPS_WOL; 1687 1688 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1689 if (ret < 0) { 1690 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1691 return ret; 1692 } 1693 1694 pdata->suspend_flags |= SUSPEND_SUSPEND3; 1695 1696 return 0; 1697 } 1698 1699 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask) 1700 { 1701 struct mii_if_info *mii = &dev->mii; 1702 int ret; 1703 1704 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n"); 1705 1706 /* read to clear */ 1707 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC); 1708 if (ret < 0) { 1709 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n"); 1710 return ret; 1711 } 1712 1713 /* enable interrupt source */ 1714 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK); 1715 if (ret < 0) { 1716 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n"); 1717 return ret; 1718 } 1719 1720 ret |= mask; 1721 1722 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret); 1723 1724 return 0; 1725 } 1726 1727 static int smsc75xx_link_ok_nopm(struct usbnet *dev) 1728 { 1729 struct mii_if_info *mii = &dev->mii; 1730 int ret; 1731 1732 /* first, a dummy read, needed to latch some MII phys */ 1733 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1734 if (ret < 0) { 1735 netdev_warn(dev->net, "Error reading MII_BMSR\n"); 1736 return ret; 1737 } 1738 1739 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR); 1740 if (ret < 0) { 1741 netdev_warn(dev->net, "Error reading MII_BMSR\n"); 1742 return ret; 1743 } 1744 1745 return !!(ret & BMSR_LSTATUS); 1746 } 1747 1748 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up) 1749 { 1750 int ret; 1751 1752 if (!netif_running(dev->net)) { 1753 /* interface is ifconfig down so fully power down hw */ 1754 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); 1755 return smsc75xx_enter_suspend2(dev); 1756 } 1757 1758 if (!link_up) { 1759 /* link is down so enter EDPD mode */ 1760 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); 1761 1762 /* enable PHY wakeup events for if cable is attached */ 1763 ret = smsc75xx_enable_phy_wakeup_interrupts(dev, 1764 PHY_INT_MASK_ANEG_COMP); 1765 if (ret < 0) { 1766 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1767 return ret; 1768 } 1769 1770 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1771 return smsc75xx_enter_suspend1(dev); 1772 } 1773 1774 /* enable PHY wakeup events so we remote wakeup if cable is pulled */ 1775 ret = smsc75xx_enable_phy_wakeup_interrupts(dev, 1776 PHY_INT_MASK_LINK_DOWN); 1777 if (ret < 0) { 1778 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1779 return ret; 1780 } 1781 1782 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); 1783 return smsc75xx_enter_suspend3(dev); 1784 } 1785 1786 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message) 1787 { 1788 struct usbnet *dev = usb_get_intfdata(intf); 1789 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1790 u32 val, link_up; 1791 int ret; 1792 1793 ret = usbnet_suspend(intf, message); 1794 if (ret < 0) { 1795 netdev_warn(dev->net, "usbnet_suspend error\n"); 1796 return ret; 1797 } 1798 1799 if (pdata->suspend_flags) { 1800 netdev_warn(dev->net, "error during last resume\n"); 1801 pdata->suspend_flags = 0; 1802 } 1803 1804 /* determine if link is up using only _nopm functions */ 1805 link_up = smsc75xx_link_ok_nopm(dev); 1806 1807 if (message.event == PM_EVENT_AUTO_SUSPEND) { 1808 ret = smsc75xx_autosuspend(dev, link_up); 1809 goto done; 1810 } 1811 1812 /* if we get this far we're not autosuspending */ 1813 /* if no wol options set, or if link is down and we're not waking on 1814 * PHY activity, enter lowest power SUSPEND2 mode 1815 */ 1816 if (!(pdata->wolopts & SUPPORTED_WAKE) || 1817 !(link_up || (pdata->wolopts & WAKE_PHY))) { 1818 netdev_info(dev->net, "entering SUSPEND2 mode\n"); 1819 1820 /* disable energy detect (link up) & wake up events */ 1821 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1822 if (ret < 0) { 1823 netdev_warn(dev->net, "Error reading WUCSR\n"); 1824 goto done; 1825 } 1826 1827 val &= ~(WUCSR_MPEN | WUCSR_WUEN); 1828 1829 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1830 if (ret < 0) { 1831 netdev_warn(dev->net, "Error writing WUCSR\n"); 1832 goto done; 1833 } 1834 1835 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1836 if (ret < 0) { 1837 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1838 goto done; 1839 } 1840 1841 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN); 1842 1843 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 1844 if (ret < 0) { 1845 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 1846 goto done; 1847 } 1848 1849 ret = smsc75xx_enter_suspend2(dev); 1850 goto done; 1851 } 1852 1853 if (pdata->wolopts & WAKE_PHY) { 1854 ret = smsc75xx_enable_phy_wakeup_interrupts(dev, 1855 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN)); 1856 if (ret < 0) { 1857 netdev_warn(dev->net, "error enabling PHY wakeup ints\n"); 1858 goto done; 1859 } 1860 1861 /* if link is down then configure EDPD and enter SUSPEND1, 1862 * otherwise enter SUSPEND0 below 1863 */ 1864 if (!link_up) { 1865 struct mii_if_info *mii = &dev->mii; 1866 netdev_info(dev->net, "entering SUSPEND1 mode\n"); 1867 1868 /* enable energy detect power-down mode */ 1869 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, 1870 PHY_MODE_CTRL_STS); 1871 if (ret < 0) { 1872 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n"); 1873 goto done; 1874 } 1875 1876 ret |= MODE_CTRL_STS_EDPWRDOWN; 1877 1878 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, 1879 PHY_MODE_CTRL_STS, ret); 1880 1881 /* enter SUSPEND1 mode */ 1882 ret = smsc75xx_enter_suspend1(dev); 1883 goto done; 1884 } 1885 } 1886 1887 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) { 1888 int i, filter = 0; 1889 1890 /* disable all filters */ 1891 for (i = 0; i < WUF_NUM; i++) { 1892 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0); 1893 if (ret < 0) { 1894 netdev_warn(dev->net, "Error writing WUF_CFGX\n"); 1895 goto done; 1896 } 1897 } 1898 1899 if (pdata->wolopts & WAKE_MCAST) { 1900 const u8 mcast[] = {0x01, 0x00, 0x5E}; 1901 netdev_info(dev->net, "enabling multicast detection\n"); 1902 1903 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST 1904 | smsc_crc(mcast, 3); 1905 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007); 1906 if (ret < 0) { 1907 netdev_warn(dev->net, "Error writing wakeup filter\n"); 1908 goto done; 1909 } 1910 } 1911 1912 if (pdata->wolopts & WAKE_ARP) { 1913 const u8 arp[] = {0x08, 0x06}; 1914 netdev_info(dev->net, "enabling ARP detection\n"); 1915 1916 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16) 1917 | smsc_crc(arp, 2); 1918 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003); 1919 if (ret < 0) { 1920 netdev_warn(dev->net, "Error writing wakeup filter\n"); 1921 goto done; 1922 } 1923 } 1924 1925 /* clear any pending pattern match packet status */ 1926 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1927 if (ret < 0) { 1928 netdev_warn(dev->net, "Error reading WUCSR\n"); 1929 goto done; 1930 } 1931 1932 val |= WUCSR_WUFR; 1933 1934 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1935 if (ret < 0) { 1936 netdev_warn(dev->net, "Error writing WUCSR\n"); 1937 goto done; 1938 } 1939 1940 netdev_info(dev->net, "enabling packet match detection\n"); 1941 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1942 if (ret < 0) { 1943 netdev_warn(dev->net, "Error reading WUCSR\n"); 1944 goto done; 1945 } 1946 1947 val |= WUCSR_WUEN; 1948 1949 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1950 if (ret < 0) { 1951 netdev_warn(dev->net, "Error writing WUCSR\n"); 1952 goto done; 1953 } 1954 } else { 1955 netdev_info(dev->net, "disabling packet match detection\n"); 1956 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1957 if (ret < 0) { 1958 netdev_warn(dev->net, "Error reading WUCSR\n"); 1959 goto done; 1960 } 1961 1962 val &= ~WUCSR_WUEN; 1963 1964 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1965 if (ret < 0) { 1966 netdev_warn(dev->net, "Error writing WUCSR\n"); 1967 goto done; 1968 } 1969 } 1970 1971 /* disable magic, bcast & unicast wakeup sources */ 1972 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 1973 if (ret < 0) { 1974 netdev_warn(dev->net, "Error reading WUCSR\n"); 1975 goto done; 1976 } 1977 1978 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN); 1979 1980 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 1981 if (ret < 0) { 1982 netdev_warn(dev->net, "Error writing WUCSR\n"); 1983 goto done; 1984 } 1985 1986 if (pdata->wolopts & WAKE_PHY) { 1987 netdev_info(dev->net, "enabling PHY wakeup\n"); 1988 1989 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 1990 if (ret < 0) { 1991 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 1992 goto done; 1993 } 1994 1995 /* clear wol status, enable energy detection */ 1996 val &= ~PMT_CTL_WUPS; 1997 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN); 1998 1999 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 2000 if (ret < 0) { 2001 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 2002 goto done; 2003 } 2004 } 2005 2006 if (pdata->wolopts & WAKE_MAGIC) { 2007 netdev_info(dev->net, "enabling magic packet wakeup\n"); 2008 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 2009 if (ret < 0) { 2010 netdev_warn(dev->net, "Error reading WUCSR\n"); 2011 goto done; 2012 } 2013 2014 /* clear any pending magic packet status */ 2015 val |= WUCSR_MPR | WUCSR_MPEN; 2016 2017 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 2018 if (ret < 0) { 2019 netdev_warn(dev->net, "Error writing WUCSR\n"); 2020 goto done; 2021 } 2022 } 2023 2024 if (pdata->wolopts & WAKE_BCAST) { 2025 netdev_info(dev->net, "enabling broadcast detection\n"); 2026 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 2027 if (ret < 0) { 2028 netdev_warn(dev->net, "Error reading WUCSR\n"); 2029 goto done; 2030 } 2031 2032 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN; 2033 2034 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 2035 if (ret < 0) { 2036 netdev_warn(dev->net, "Error writing WUCSR\n"); 2037 goto done; 2038 } 2039 } 2040 2041 if (pdata->wolopts & WAKE_UCAST) { 2042 netdev_info(dev->net, "enabling unicast detection\n"); 2043 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 2044 if (ret < 0) { 2045 netdev_warn(dev->net, "Error reading WUCSR\n"); 2046 goto done; 2047 } 2048 2049 val |= WUCSR_WUFR | WUCSR_PFDA_EN; 2050 2051 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 2052 if (ret < 0) { 2053 netdev_warn(dev->net, "Error writing WUCSR\n"); 2054 goto done; 2055 } 2056 } 2057 2058 /* enable receiver to enable frame reception */ 2059 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val); 2060 if (ret < 0) { 2061 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret); 2062 goto done; 2063 } 2064 2065 val |= MAC_RX_RXEN; 2066 2067 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val); 2068 if (ret < 0) { 2069 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 2070 goto done; 2071 } 2072 2073 /* some wol options are enabled, so enter SUSPEND0 */ 2074 netdev_info(dev->net, "entering SUSPEND0 mode\n"); 2075 ret = smsc75xx_enter_suspend0(dev); 2076 2077 done: 2078 /* 2079 * TODO: resume() might need to handle the suspend failure 2080 * in system sleep 2081 */ 2082 if (ret && PMSG_IS_AUTO(message)) 2083 usbnet_resume(intf); 2084 return ret; 2085 } 2086 2087 static int smsc75xx_resume(struct usb_interface *intf) 2088 { 2089 struct usbnet *dev = usb_get_intfdata(intf); 2090 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 2091 u8 suspend_flags = pdata->suspend_flags; 2092 int ret; 2093 u32 val; 2094 2095 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); 2096 2097 /* do this first to ensure it's cleared even in error case */ 2098 pdata->suspend_flags = 0; 2099 2100 if (suspend_flags & SUSPEND_ALLMODES) { 2101 /* Disable wakeup sources */ 2102 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val); 2103 if (ret < 0) { 2104 netdev_warn(dev->net, "Error reading WUCSR\n"); 2105 return ret; 2106 } 2107 2108 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN 2109 | WUCSR_BCST_EN); 2110 2111 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val); 2112 if (ret < 0) { 2113 netdev_warn(dev->net, "Error writing WUCSR\n"); 2114 return ret; 2115 } 2116 2117 /* clear wake-up status */ 2118 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 2119 if (ret < 0) { 2120 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 2121 return ret; 2122 } 2123 2124 val &= ~PMT_CTL_WOL_EN; 2125 val |= PMT_CTL_WUPS; 2126 2127 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 2128 if (ret < 0) { 2129 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 2130 return ret; 2131 } 2132 } 2133 2134 if (suspend_flags & SUSPEND_SUSPEND2) { 2135 netdev_info(dev->net, "resuming from SUSPEND2\n"); 2136 2137 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val); 2138 if (ret < 0) { 2139 netdev_warn(dev->net, "Error reading PMT_CTL\n"); 2140 return ret; 2141 } 2142 2143 val |= PMT_CTL_PHY_PWRUP; 2144 2145 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val); 2146 if (ret < 0) { 2147 netdev_warn(dev->net, "Error writing PMT_CTL\n"); 2148 return ret; 2149 } 2150 } 2151 2152 ret = smsc75xx_wait_ready(dev, 1); 2153 if (ret < 0) { 2154 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n"); 2155 return ret; 2156 } 2157 2158 return usbnet_resume(intf); 2159 } 2160 2161 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb, 2162 u32 rx_cmd_a, u32 rx_cmd_b) 2163 { 2164 if (!(dev->net->features & NETIF_F_RXCSUM) || 2165 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) { 2166 skb->ip_summed = CHECKSUM_NONE; 2167 } else { 2168 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT)); 2169 skb->ip_summed = CHECKSUM_COMPLETE; 2170 } 2171 } 2172 2173 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) 2174 { 2175 /* This check is no longer done by usbnet */ 2176 if (skb->len < dev->net->hard_header_len) 2177 return 0; 2178 2179 while (skb->len > 0) { 2180 u32 rx_cmd_a, rx_cmd_b, align_count, size; 2181 struct sk_buff *ax_skb; 2182 unsigned char *packet; 2183 2184 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a)); 2185 le32_to_cpus(&rx_cmd_a); 2186 skb_pull(skb, 4); 2187 2188 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b)); 2189 le32_to_cpus(&rx_cmd_b); 2190 skb_pull(skb, 4 + RXW_PADDING); 2191 2192 packet = skb->data; 2193 2194 /* get the packet length */ 2195 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING; 2196 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4; 2197 2198 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) { 2199 netif_dbg(dev, rx_err, dev->net, 2200 "Error rx_cmd_a=0x%08x\n", rx_cmd_a); 2201 dev->net->stats.rx_errors++; 2202 dev->net->stats.rx_dropped++; 2203 2204 if (rx_cmd_a & RX_CMD_A_FCS) 2205 dev->net->stats.rx_crc_errors++; 2206 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT)) 2207 dev->net->stats.rx_frame_errors++; 2208 } else { 2209 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */ 2210 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) { 2211 netif_dbg(dev, rx_err, dev->net, 2212 "size err rx_cmd_a=0x%08x\n", 2213 rx_cmd_a); 2214 return 0; 2215 } 2216 2217 /* last frame in this batch */ 2218 if (skb->len == size) { 2219 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a, 2220 rx_cmd_b); 2221 2222 skb_trim(skb, skb->len - 4); /* remove fcs */ 2223 skb->truesize = size + sizeof(struct sk_buff); 2224 2225 return 1; 2226 } 2227 2228 ax_skb = skb_clone(skb, GFP_ATOMIC); 2229 if (unlikely(!ax_skb)) { 2230 netdev_warn(dev->net, "Error allocating skb\n"); 2231 return 0; 2232 } 2233 2234 ax_skb->len = size; 2235 ax_skb->data = packet; 2236 skb_set_tail_pointer(ax_skb, size); 2237 2238 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a, 2239 rx_cmd_b); 2240 2241 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 2242 ax_skb->truesize = size + sizeof(struct sk_buff); 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 2262 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) { 2263 dev_kfree_skb_any(skb); 2264 return NULL; 2265 } 2266 2267 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS; 2268 2269 if (skb->ip_summed == CHECKSUM_PARTIAL) 2270 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE; 2271 2272 if (skb_is_gso(skb)) { 2273 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN); 2274 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS; 2275 2276 tx_cmd_a |= TX_CMD_A_LSO; 2277 } else { 2278 tx_cmd_b = 0; 2279 } 2280 2281 skb_push(skb, 4); 2282 cpu_to_le32s(&tx_cmd_b); 2283 memcpy(skb->data, &tx_cmd_b, 4); 2284 2285 skb_push(skb, 4); 2286 cpu_to_le32s(&tx_cmd_a); 2287 memcpy(skb->data, &tx_cmd_a, 4); 2288 2289 return skb; 2290 } 2291 2292 static int smsc75xx_manage_power(struct usbnet *dev, int on) 2293 { 2294 dev->intf->needs_remote_wakeup = on; 2295 return 0; 2296 } 2297 2298 static const struct driver_info smsc75xx_info = { 2299 .description = "smsc75xx USB 2.0 Gigabit Ethernet", 2300 .bind = smsc75xx_bind, 2301 .unbind = smsc75xx_unbind, 2302 .link_reset = smsc75xx_link_reset, 2303 .reset = smsc75xx_reset, 2304 .rx_fixup = smsc75xx_rx_fixup, 2305 .tx_fixup = smsc75xx_tx_fixup, 2306 .status = smsc75xx_status, 2307 .manage_power = smsc75xx_manage_power, 2308 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2309 }; 2310 2311 static const struct usb_device_id products[] = { 2312 { 2313 /* SMSC7500 USB Gigabit Ethernet Device */ 2314 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500), 2315 .driver_info = (unsigned long) &smsc75xx_info, 2316 }, 2317 { 2318 /* SMSC7500 USB Gigabit Ethernet Device */ 2319 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505), 2320 .driver_info = (unsigned long) &smsc75xx_info, 2321 }, 2322 { }, /* END */ 2323 }; 2324 MODULE_DEVICE_TABLE(usb, products); 2325 2326 static struct usb_driver smsc75xx_driver = { 2327 .name = SMSC_CHIPNAME, 2328 .id_table = products, 2329 .probe = usbnet_probe, 2330 .suspend = smsc75xx_suspend, 2331 .resume = smsc75xx_resume, 2332 .reset_resume = smsc75xx_resume, 2333 .disconnect = usbnet_disconnect, 2334 .disable_hub_initiated_lpm = 1, 2335 .supports_autosuspend = 1, 2336 }; 2337 2338 module_usb_driver(smsc75xx_driver); 2339 2340 MODULE_AUTHOR("Nancy Lin"); 2341 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2342 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices"); 2343 MODULE_LICENSE("GPL"); 2344