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 intdata = get_unaligned_le32(urb->transfer_buffer); 665 666 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); 667 668 if (intdata & INT_ENP_PHY_INT) 669 usbnet_defer_kevent(dev, EVENT_LINK_RESET); 670 else 671 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", 672 intdata); 673 } 674 675 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net) 676 { 677 return MAX_EEPROM_SIZE; 678 } 679 680 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev, 681 struct ethtool_eeprom *ee, u8 *data) 682 { 683 struct usbnet *dev = netdev_priv(netdev); 684 685 ee->magic = LAN75XX_EEPROM_MAGIC; 686 687 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data); 688 } 689 690 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev, 691 struct ethtool_eeprom *ee, u8 *data) 692 { 693 struct usbnet *dev = netdev_priv(netdev); 694 695 if (ee->magic != LAN75XX_EEPROM_MAGIC) { 696 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n", 697 ee->magic); 698 return -EINVAL; 699 } 700 701 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data); 702 } 703 704 static void smsc75xx_ethtool_get_wol(struct net_device *net, 705 struct ethtool_wolinfo *wolinfo) 706 { 707 struct usbnet *dev = netdev_priv(net); 708 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 709 710 wolinfo->supported = SUPPORTED_WAKE; 711 wolinfo->wolopts = pdata->wolopts; 712 } 713 714 static int smsc75xx_ethtool_set_wol(struct net_device *net, 715 struct ethtool_wolinfo *wolinfo) 716 { 717 struct usbnet *dev = netdev_priv(net); 718 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 719 int ret; 720 721 if (wolinfo->wolopts & ~SUPPORTED_WAKE) 722 return -EINVAL; 723 724 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; 725 726 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); 727 if (ret < 0) 728 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); 729 730 return ret; 731 } 732 733 static const struct ethtool_ops smsc75xx_ethtool_ops = { 734 .get_link = usbnet_get_link, 735 .nway_reset = usbnet_nway_reset, 736 .get_drvinfo = usbnet_get_drvinfo, 737 .get_msglevel = usbnet_get_msglevel, 738 .set_msglevel = usbnet_set_msglevel, 739 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len, 740 .get_eeprom = smsc75xx_ethtool_get_eeprom, 741 .set_eeprom = smsc75xx_ethtool_set_eeprom, 742 .get_wol = smsc75xx_ethtool_get_wol, 743 .set_wol = smsc75xx_ethtool_set_wol, 744 .get_link_ksettings = usbnet_get_link_ksettings, 745 .set_link_ksettings = usbnet_set_link_ksettings, 746 }; 747 748 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 749 { 750 struct usbnet *dev = netdev_priv(netdev); 751 752 if (!netif_running(netdev)) 753 return -EINVAL; 754 755 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); 756 } 757 758 static void smsc75xx_init_mac_address(struct usbnet *dev) 759 { 760 const u8 *mac_addr; 761 762 /* maybe the boot loader passed the MAC address in devicetree */ 763 mac_addr = of_get_mac_address(dev->udev->dev.of_node); 764 if (!IS_ERR(mac_addr)) { 765 ether_addr_copy(dev->net->dev_addr, mac_addr); 766 return; 767 } 768 769 /* try reading mac address from EEPROM */ 770 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, 771 dev->net->dev_addr) == 0) { 772 if (is_valid_ether_addr(dev->net->dev_addr)) { 773 /* eeprom values are valid so use them */ 774 netif_dbg(dev, ifup, dev->net, 775 "MAC address read from EEPROM\n"); 776 return; 777 } 778 } 779 780 /* no useful static MAC address found. generate a random one */ 781 eth_hw_addr_random(dev->net); 782 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); 783 } 784 785 static int smsc75xx_set_mac_address(struct usbnet *dev) 786 { 787 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | 788 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; 789 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; 790 791 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi); 792 if (ret < 0) { 793 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret); 794 return ret; 795 } 796 797 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo); 798 if (ret < 0) { 799 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret); 800 return ret; 801 } 802 803 addr_hi |= ADDR_FILTX_FB_VALID; 804 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi); 805 if (ret < 0) { 806 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret); 807 return ret; 808 } 809 810 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo); 811 if (ret < 0) 812 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret); 813 814 return ret; 815 } 816 817 static int smsc75xx_phy_initialize(struct usbnet *dev) 818 { 819 int bmcr, ret, timeout = 0; 820 821 /* Initialize MII structure */ 822 dev->mii.dev = dev->net; 823 dev->mii.mdio_read = smsc75xx_mdio_read; 824 dev->mii.mdio_write = smsc75xx_mdio_write; 825 dev->mii.phy_id_mask = 0x1f; 826 dev->mii.reg_num_mask = 0x1f; 827 dev->mii.supports_gmii = 1; 828 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID; 829 830 /* reset phy and wait for reset to complete */ 831 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); 832 833 do { 834 msleep(10); 835 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR); 836 if (bmcr < 0) { 837 netdev_warn(dev->net, "Error reading MII_BMCR\n"); 838 return bmcr; 839 } 840 timeout++; 841 } while ((bmcr & BMCR_RESET) && (timeout < 100)); 842 843 if (timeout >= 100) { 844 netdev_warn(dev->net, "timeout on PHY Reset\n"); 845 return -EIO; 846 } 847 848 /* phy workaround for gig link */ 849 smsc75xx_phy_gig_workaround(dev); 850 851 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, 852 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | 853 ADVERTISE_PAUSE_ASYM); 854 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000, 855 ADVERTISE_1000FULL); 856 857 /* read and write to clear phy interrupt status */ 858 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); 859 if (ret < 0) { 860 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n"); 861 return ret; 862 } 863 864 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff); 865 866 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, 867 PHY_INT_MASK_DEFAULT); 868 mii_nway_restart(&dev->mii); 869 870 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n"); 871 return 0; 872 } 873 874 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size) 875 { 876 int ret = 0; 877 u32 buf; 878 bool rxenabled; 879 880 ret = smsc75xx_read_reg(dev, MAC_RX, &buf); 881 if (ret < 0) { 882 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret); 883 return ret; 884 } 885 886 rxenabled = ((buf & MAC_RX_RXEN) != 0); 887 888 if (rxenabled) { 889 buf &= ~MAC_RX_RXEN; 890 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 891 if (ret < 0) { 892 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 893 return ret; 894 } 895 } 896 897 /* add 4 to size for FCS */ 898 buf &= ~MAC_RX_MAX_SIZE; 899 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE); 900 901 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 902 if (ret < 0) { 903 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 904 return ret; 905 } 906 907 if (rxenabled) { 908 buf |= MAC_RX_RXEN; 909 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 910 if (ret < 0) { 911 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 912 return ret; 913 } 914 } 915 916 return 0; 917 } 918 919 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu) 920 { 921 struct usbnet *dev = netdev_priv(netdev); 922 int ret; 923 924 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN); 925 if (ret < 0) { 926 netdev_warn(dev->net, "Failed to set mac rx frame length\n"); 927 return ret; 928 } 929 930 return usbnet_change_mtu(netdev, new_mtu); 931 } 932 933 /* Enable or disable Rx checksum offload engine */ 934 static int smsc75xx_set_features(struct net_device *netdev, 935 netdev_features_t features) 936 { 937 struct usbnet *dev = netdev_priv(netdev); 938 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 939 unsigned long flags; 940 int ret; 941 942 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); 943 944 if (features & NETIF_F_RXCSUM) 945 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM; 946 else 947 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM); 948 949 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); 950 /* it's racing here! */ 951 952 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 953 if (ret < 0) { 954 netdev_warn(dev->net, "Error writing RFE_CTL\n"); 955 return ret; 956 } 957 return 0; 958 } 959 960 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm) 961 { 962 int timeout = 0; 963 964 do { 965 u32 buf; 966 int ret; 967 968 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm); 969 970 if (ret < 0) { 971 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 972 return ret; 973 } 974 975 if (buf & PMT_CTL_DEV_RDY) 976 return 0; 977 978 msleep(10); 979 timeout++; 980 } while (timeout < 100); 981 982 netdev_warn(dev->net, "timeout waiting for device ready\n"); 983 return -EIO; 984 } 985 986 static int smsc75xx_phy_gig_workaround(struct usbnet *dev) 987 { 988 struct mii_if_info *mii = &dev->mii; 989 int ret = 0, timeout = 0; 990 u32 buf, link_up = 0; 991 992 /* Set the phy in Gig loopback */ 993 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040); 994 995 /* Wait for the link up */ 996 do { 997 link_up = smsc75xx_link_ok_nopm(dev); 998 usleep_range(10000, 20000); 999 timeout++; 1000 } while ((!link_up) && (timeout < 1000)); 1001 1002 if (timeout >= 1000) { 1003 netdev_warn(dev->net, "Timeout waiting for PHY link up\n"); 1004 return -EIO; 1005 } 1006 1007 /* phy reset */ 1008 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1009 if (ret < 0) { 1010 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1011 return ret; 1012 } 1013 1014 buf |= PMT_CTL_PHY_RST; 1015 1016 ret = smsc75xx_write_reg(dev, PMT_CTL, buf); 1017 if (ret < 0) { 1018 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret); 1019 return ret; 1020 } 1021 1022 timeout = 0; 1023 do { 1024 usleep_range(10000, 20000); 1025 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1026 if (ret < 0) { 1027 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", 1028 ret); 1029 return ret; 1030 } 1031 timeout++; 1032 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100)); 1033 1034 if (timeout >= 100) { 1035 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1036 return -EIO; 1037 } 1038 1039 return 0; 1040 } 1041 1042 static int smsc75xx_reset(struct usbnet *dev) 1043 { 1044 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1045 u32 buf; 1046 int ret = 0, timeout; 1047 1048 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n"); 1049 1050 ret = smsc75xx_wait_ready(dev, 0); 1051 if (ret < 0) { 1052 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n"); 1053 return ret; 1054 } 1055 1056 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1057 if (ret < 0) { 1058 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1059 return ret; 1060 } 1061 1062 buf |= HW_CFG_LRST; 1063 1064 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1065 if (ret < 0) { 1066 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1067 return ret; 1068 } 1069 1070 timeout = 0; 1071 do { 1072 msleep(10); 1073 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1074 if (ret < 0) { 1075 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1076 return ret; 1077 } 1078 timeout++; 1079 } while ((buf & HW_CFG_LRST) && (timeout < 100)); 1080 1081 if (timeout >= 100) { 1082 netdev_warn(dev->net, "timeout on completion of Lite Reset\n"); 1083 return -EIO; 1084 } 1085 1086 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n"); 1087 1088 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1089 if (ret < 0) { 1090 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1091 return ret; 1092 } 1093 1094 buf |= PMT_CTL_PHY_RST; 1095 1096 ret = smsc75xx_write_reg(dev, PMT_CTL, buf); 1097 if (ret < 0) { 1098 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret); 1099 return ret; 1100 } 1101 1102 timeout = 0; 1103 do { 1104 msleep(10); 1105 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf); 1106 if (ret < 0) { 1107 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret); 1108 return ret; 1109 } 1110 timeout++; 1111 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100)); 1112 1113 if (timeout >= 100) { 1114 netdev_warn(dev->net, "timeout waiting for PHY Reset\n"); 1115 return -EIO; 1116 } 1117 1118 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n"); 1119 1120 ret = smsc75xx_set_mac_address(dev); 1121 if (ret < 0) { 1122 netdev_warn(dev->net, "Failed to set mac address\n"); 1123 return ret; 1124 } 1125 1126 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", 1127 dev->net->dev_addr); 1128 1129 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1130 if (ret < 0) { 1131 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1132 return ret; 1133 } 1134 1135 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", 1136 buf); 1137 1138 buf |= HW_CFG_BIR; 1139 1140 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1141 if (ret < 0) { 1142 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1143 return ret; 1144 } 1145 1146 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1147 if (ret < 0) { 1148 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1149 return ret; 1150 } 1151 1152 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n", 1153 buf); 1154 1155 if (!turbo_mode) { 1156 buf = 0; 1157 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; 1158 } else if (dev->udev->speed == USB_SPEED_HIGH) { 1159 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 1160 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; 1161 } else { 1162 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 1163 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; 1164 } 1165 1166 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", 1167 (ulong)dev->rx_urb_size); 1168 1169 ret = smsc75xx_write_reg(dev, BURST_CAP, buf); 1170 if (ret < 0) { 1171 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret); 1172 return ret; 1173 } 1174 1175 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf); 1176 if (ret < 0) { 1177 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret); 1178 return ret; 1179 } 1180 1181 netif_dbg(dev, ifup, dev->net, 1182 "Read Value from BURST_CAP after writing: 0x%08x\n", buf); 1183 1184 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 1185 if (ret < 0) { 1186 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret); 1187 return ret; 1188 } 1189 1190 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf); 1191 if (ret < 0) { 1192 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret); 1193 return ret; 1194 } 1195 1196 netif_dbg(dev, ifup, dev->net, 1197 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf); 1198 1199 if (turbo_mode) { 1200 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1201 if (ret < 0) { 1202 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1203 return ret; 1204 } 1205 1206 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf); 1207 1208 buf |= (HW_CFG_MEF | HW_CFG_BCE); 1209 1210 ret = smsc75xx_write_reg(dev, HW_CFG, buf); 1211 if (ret < 0) { 1212 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret); 1213 return ret; 1214 } 1215 1216 ret = smsc75xx_read_reg(dev, HW_CFG, &buf); 1217 if (ret < 0) { 1218 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret); 1219 return ret; 1220 } 1221 1222 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf); 1223 } 1224 1225 /* set FIFO sizes */ 1226 buf = (MAX_RX_FIFO_SIZE - 512) / 512; 1227 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf); 1228 if (ret < 0) { 1229 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret); 1230 return ret; 1231 } 1232 1233 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf); 1234 1235 buf = (MAX_TX_FIFO_SIZE - 512) / 512; 1236 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf); 1237 if (ret < 0) { 1238 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret); 1239 return ret; 1240 } 1241 1242 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf); 1243 1244 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL); 1245 if (ret < 0) { 1246 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret); 1247 return ret; 1248 } 1249 1250 ret = smsc75xx_read_reg(dev, ID_REV, &buf); 1251 if (ret < 0) { 1252 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret); 1253 return ret; 1254 } 1255 1256 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf); 1257 1258 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf); 1259 if (ret < 0) { 1260 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret); 1261 return ret; 1262 } 1263 1264 /* only set default GPIO/LED settings if no EEPROM is detected */ 1265 if (!(buf & E2P_CMD_LOADED)) { 1266 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf); 1267 if (ret < 0) { 1268 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret); 1269 return ret; 1270 } 1271 1272 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL); 1273 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL; 1274 1275 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf); 1276 if (ret < 0) { 1277 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret); 1278 return ret; 1279 } 1280 } 1281 1282 ret = smsc75xx_write_reg(dev, FLOW, 0); 1283 if (ret < 0) { 1284 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret); 1285 return ret; 1286 } 1287 1288 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0); 1289 if (ret < 0) { 1290 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret); 1291 return ret; 1292 } 1293 1294 /* Don't need rfe_ctl_lock during initialisation */ 1295 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); 1296 if (ret < 0) { 1297 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret); 1298 return ret; 1299 } 1300 1301 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF; 1302 1303 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 1304 if (ret < 0) { 1305 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret); 1306 return ret; 1307 } 1308 1309 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); 1310 if (ret < 0) { 1311 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret); 1312 return ret; 1313 } 1314 1315 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n", 1316 pdata->rfe_ctl); 1317 1318 /* Enable or disable checksum offload engines */ 1319 smsc75xx_set_features(dev->net, dev->net->features); 1320 1321 smsc75xx_set_multicast(dev->net); 1322 1323 ret = smsc75xx_phy_initialize(dev); 1324 if (ret < 0) { 1325 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret); 1326 return ret; 1327 } 1328 1329 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf); 1330 if (ret < 0) { 1331 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret); 1332 return ret; 1333 } 1334 1335 /* enable PHY interrupts */ 1336 buf |= INT_ENP_PHY_INT; 1337 1338 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf); 1339 if (ret < 0) { 1340 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret); 1341 return ret; 1342 } 1343 1344 /* allow mac to detect speed and duplex from phy */ 1345 ret = smsc75xx_read_reg(dev, MAC_CR, &buf); 1346 if (ret < 0) { 1347 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret); 1348 return ret; 1349 } 1350 1351 buf |= (MAC_CR_ADD | MAC_CR_ASD); 1352 ret = smsc75xx_write_reg(dev, MAC_CR, buf); 1353 if (ret < 0) { 1354 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret); 1355 return ret; 1356 } 1357 1358 ret = smsc75xx_read_reg(dev, MAC_TX, &buf); 1359 if (ret < 0) { 1360 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret); 1361 return ret; 1362 } 1363 1364 buf |= MAC_TX_TXEN; 1365 1366 ret = smsc75xx_write_reg(dev, MAC_TX, buf); 1367 if (ret < 0) { 1368 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret); 1369 return ret; 1370 } 1371 1372 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf); 1373 1374 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf); 1375 if (ret < 0) { 1376 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret); 1377 return ret; 1378 } 1379 1380 buf |= FCT_TX_CTL_EN; 1381 1382 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf); 1383 if (ret < 0) { 1384 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret); 1385 return ret; 1386 } 1387 1388 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf); 1389 1390 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN); 1391 if (ret < 0) { 1392 netdev_warn(dev->net, "Failed to set max rx frame length\n"); 1393 return ret; 1394 } 1395 1396 ret = smsc75xx_read_reg(dev, MAC_RX, &buf); 1397 if (ret < 0) { 1398 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret); 1399 return ret; 1400 } 1401 1402 buf |= MAC_RX_RXEN; 1403 1404 ret = smsc75xx_write_reg(dev, MAC_RX, buf); 1405 if (ret < 0) { 1406 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret); 1407 return ret; 1408 } 1409 1410 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf); 1411 1412 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf); 1413 if (ret < 0) { 1414 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret); 1415 return ret; 1416 } 1417 1418 buf |= FCT_RX_CTL_EN; 1419 1420 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf); 1421 if (ret < 0) { 1422 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret); 1423 return ret; 1424 } 1425 1426 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf); 1427 1428 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n"); 1429 return 0; 1430 } 1431 1432 static const struct net_device_ops smsc75xx_netdev_ops = { 1433 .ndo_open = usbnet_open, 1434 .ndo_stop = usbnet_stop, 1435 .ndo_start_xmit = usbnet_start_xmit, 1436 .ndo_tx_timeout = usbnet_tx_timeout, 1437 .ndo_get_stats64 = usbnet_get_stats64, 1438 .ndo_change_mtu = smsc75xx_change_mtu, 1439 .ndo_set_mac_address = eth_mac_addr, 1440 .ndo_validate_addr = eth_validate_addr, 1441 .ndo_do_ioctl = smsc75xx_ioctl, 1442 .ndo_set_rx_mode = smsc75xx_set_multicast, 1443 .ndo_set_features = smsc75xx_set_features, 1444 }; 1445 1446 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf) 1447 { 1448 struct smsc75xx_priv *pdata = NULL; 1449 int ret; 1450 1451 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); 1452 1453 ret = usbnet_get_endpoints(dev, intf); 1454 if (ret < 0) { 1455 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); 1456 return ret; 1457 } 1458 1459 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv), 1460 GFP_KERNEL); 1461 1462 pdata = (struct smsc75xx_priv *)(dev->data[0]); 1463 if (!pdata) 1464 return -ENOMEM; 1465 1466 pdata->dev = dev; 1467 1468 spin_lock_init(&pdata->rfe_ctl_lock); 1469 mutex_init(&pdata->dataport_mutex); 1470 1471 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write); 1472 1473 if (DEFAULT_TX_CSUM_ENABLE) 1474 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1475 1476 if (DEFAULT_RX_CSUM_ENABLE) 1477 dev->net->features |= NETIF_F_RXCSUM; 1478 1479 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 1480 NETIF_F_RXCSUM; 1481 1482 ret = smsc75xx_wait_ready(dev, 0); 1483 if (ret < 0) { 1484 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n"); 1485 return ret; 1486 } 1487 1488 smsc75xx_init_mac_address(dev); 1489 1490 /* Init all registers */ 1491 ret = smsc75xx_reset(dev); 1492 if (ret < 0) { 1493 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret); 1494 return ret; 1495 } 1496 1497 dev->net->netdev_ops = &smsc75xx_netdev_ops; 1498 dev->net->ethtool_ops = &smsc75xx_ethtool_ops; 1499 dev->net->flags |= IFF_MULTICAST; 1500 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD; 1501 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 1502 dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE; 1503 return 0; 1504 } 1505 1506 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf) 1507 { 1508 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]); 1509 if (pdata) { 1510 cancel_work_sync(&pdata->set_multicast); 1511 netif_dbg(dev, ifdown, dev->net, "free pdata\n"); 1512 kfree(pdata); 1513 pdata = NULL; 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(rx_cmd_a & RX_CMD_A_RED)) { 2196 netif_dbg(dev, rx_err, dev->net, 2197 "Error rx_cmd_a=0x%08x\n", rx_cmd_a); 2198 dev->net->stats.rx_errors++; 2199 dev->net->stats.rx_dropped++; 2200 2201 if (rx_cmd_a & RX_CMD_A_FCS) 2202 dev->net->stats.rx_crc_errors++; 2203 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT)) 2204 dev->net->stats.rx_frame_errors++; 2205 } else { 2206 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */ 2207 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) { 2208 netif_dbg(dev, rx_err, dev->net, 2209 "size err rx_cmd_a=0x%08x\n", 2210 rx_cmd_a); 2211 return 0; 2212 } 2213 2214 /* last frame in this batch */ 2215 if (skb->len == size) { 2216 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a, 2217 rx_cmd_b); 2218 2219 skb_trim(skb, skb->len - 4); /* remove fcs */ 2220 skb->truesize = size + sizeof(struct sk_buff); 2221 2222 return 1; 2223 } 2224 2225 ax_skb = skb_clone(skb, GFP_ATOMIC); 2226 if (unlikely(!ax_skb)) { 2227 netdev_warn(dev->net, "Error allocating skb\n"); 2228 return 0; 2229 } 2230 2231 ax_skb->len = size; 2232 ax_skb->data = packet; 2233 skb_set_tail_pointer(ax_skb, size); 2234 2235 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a, 2236 rx_cmd_b); 2237 2238 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ 2239 ax_skb->truesize = size + sizeof(struct sk_buff); 2240 2241 usbnet_skb_return(dev, ax_skb); 2242 } 2243 2244 skb_pull(skb, size); 2245 2246 /* padding bytes before the next frame starts */ 2247 if (skb->len) 2248 skb_pull(skb, align_count); 2249 } 2250 2251 return 1; 2252 } 2253 2254 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev, 2255 struct sk_buff *skb, gfp_t flags) 2256 { 2257 u32 tx_cmd_a, tx_cmd_b; 2258 void *ptr; 2259 2260 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) { 2261 dev_kfree_skb_any(skb); 2262 return NULL; 2263 } 2264 2265 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS; 2266 2267 if (skb->ip_summed == CHECKSUM_PARTIAL) 2268 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE; 2269 2270 if (skb_is_gso(skb)) { 2271 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN); 2272 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS; 2273 2274 tx_cmd_a |= TX_CMD_A_LSO; 2275 } else { 2276 tx_cmd_b = 0; 2277 } 2278 2279 ptr = skb_push(skb, 8); 2280 put_unaligned_le32(tx_cmd_a, ptr); 2281 put_unaligned_le32(tx_cmd_b, ptr + 4); 2282 2283 return skb; 2284 } 2285 2286 static int smsc75xx_manage_power(struct usbnet *dev, int on) 2287 { 2288 dev->intf->needs_remote_wakeup = on; 2289 return 0; 2290 } 2291 2292 static const struct driver_info smsc75xx_info = { 2293 .description = "smsc75xx USB 2.0 Gigabit Ethernet", 2294 .bind = smsc75xx_bind, 2295 .unbind = smsc75xx_unbind, 2296 .link_reset = smsc75xx_link_reset, 2297 .reset = smsc75xx_reset, 2298 .rx_fixup = smsc75xx_rx_fixup, 2299 .tx_fixup = smsc75xx_tx_fixup, 2300 .status = smsc75xx_status, 2301 .manage_power = smsc75xx_manage_power, 2302 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, 2303 }; 2304 2305 static const struct usb_device_id products[] = { 2306 { 2307 /* SMSC7500 USB Gigabit Ethernet Device */ 2308 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500), 2309 .driver_info = (unsigned long) &smsc75xx_info, 2310 }, 2311 { 2312 /* SMSC7500 USB Gigabit Ethernet Device */ 2313 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505), 2314 .driver_info = (unsigned long) &smsc75xx_info, 2315 }, 2316 { }, /* END */ 2317 }; 2318 MODULE_DEVICE_TABLE(usb, products); 2319 2320 static struct usb_driver smsc75xx_driver = { 2321 .name = SMSC_CHIPNAME, 2322 .id_table = products, 2323 .probe = usbnet_probe, 2324 .suspend = smsc75xx_suspend, 2325 .resume = smsc75xx_resume, 2326 .reset_resume = smsc75xx_resume, 2327 .disconnect = usbnet_disconnect, 2328 .disable_hub_initiated_lpm = 1, 2329 .supports_autosuspend = 1, 2330 }; 2331 2332 module_usb_driver(smsc75xx_driver); 2333 2334 MODULE_AUTHOR("Nancy Lin"); 2335 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); 2336 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices"); 2337 MODULE_LICENSE("GPL"); 2338