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
  53struct 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
  64struct usb_context {
  65	struct usb_ctrlrequest req;
  66	struct usbnet *dev;
  67};
  68
  69static bool turbo_mode = true;
  70module_param(turbo_mode, bool, 0644);
  71MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  72
  73static int smsc75xx_link_ok_nopm(struct usbnet *dev);
  74static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
  75
  76static 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 < 4)) {
  94		ret = ret < 0 ? ret : -ENODATA;
  95
  96		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  97			    index, ret);
  98		return ret;
  99	}
 100
 101	le32_to_cpus(&buf);
 102	*data = buf;
 103
 104	return ret;
 105}
 106
 107static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 108					     u32 data, int in_pm)
 109{
 110	u32 buf;
 111	int ret;
 112	int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 113
 114	BUG_ON(!dev);
 115
 116	if (!in_pm)
 117		fn = usbnet_write_cmd;
 118	else
 119		fn = usbnet_write_cmd_nopm;
 120
 121	buf = data;
 122	cpu_to_le32s(&buf);
 123
 124	ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 125		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 126		 0, index, &buf, 4);
 127	if (unlikely(ret < 0))
 128		netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 129			    index, ret);
 130
 131	return ret;
 132}
 133
 134static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 135					       u32 *data)
 136{
 137	return __smsc75xx_read_reg(dev, index, data, 1);
 138}
 139
 140static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 141						u32 data)
 142{
 143	return __smsc75xx_write_reg(dev, index, data, 1);
 144}
 145
 146static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 147					  u32 *data)
 148{
 149	return __smsc75xx_read_reg(dev, index, data, 0);
 150}
 151
 152static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 153					   u32 data)
 154{
 155	return __smsc75xx_write_reg(dev, index, data, 0);
 156}
 157
 158/* Loop until the read is completed with timeout
 159 * called with phy_mutex held */
 160static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 161						     int in_pm)
 162{
 163	unsigned long start_time = jiffies;
 164	u32 val;
 165	int ret;
 166
 167	do {
 168		ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 169		if (ret < 0) {
 170			netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 171			return ret;
 172		}
 173
 174		if (!(val & MII_ACCESS_BUSY))
 175			return 0;
 176	} while (!time_after(jiffies, start_time + HZ));
 177
 178	return -EIO;
 179}
 180
 181static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 182				int in_pm)
 183{
 184	struct usbnet *dev = netdev_priv(netdev);
 185	u32 val, addr;
 186	int ret;
 187
 188	mutex_lock(&dev->phy_mutex);
 189
 190	/* confirm MII not busy */
 191	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 192	if (ret < 0) {
 193		netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 194		goto done;
 195	}
 196
 197	/* set the address, index & direction (read from PHY) */
 198	phy_id &= dev->mii.phy_id_mask;
 199	idx &= dev->mii.reg_num_mask;
 200	addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 201		| ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 202		| MII_ACCESS_READ | MII_ACCESS_BUSY;
 203	ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 204	if (ret < 0) {
 205		netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 206		goto done;
 207	}
 208
 209	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 210	if (ret < 0) {
 211		netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 212		goto done;
 213	}
 214
 215	ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 216	if (ret < 0) {
 217		netdev_warn(dev->net, "Error reading MII_DATA\n");
 218		goto done;
 219	}
 220
 221	ret = (u16)(val & 0xFFFF);
 222
 223done:
 224	mutex_unlock(&dev->phy_mutex);
 225	return ret;
 226}
 227
 228static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 229				  int idx, int regval, int in_pm)
 230{
 231	struct usbnet *dev = netdev_priv(netdev);
 232	u32 val, addr;
 233	int ret;
 234
 235	mutex_lock(&dev->phy_mutex);
 236
 237	/* confirm MII not busy */
 238	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 239	if (ret < 0) {
 240		netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 241		goto done;
 242	}
 243
 244	val = regval;
 245	ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 246	if (ret < 0) {
 247		netdev_warn(dev->net, "Error writing MII_DATA\n");
 248		goto done;
 249	}
 250
 251	/* set the address, index & direction (write to PHY) */
 252	phy_id &= dev->mii.phy_id_mask;
 253	idx &= dev->mii.reg_num_mask;
 254	addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 255		| ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 256		| MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 257	ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 258	if (ret < 0) {
 259		netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 260		goto done;
 261	}
 262
 263	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 264	if (ret < 0) {
 265		netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 266		goto done;
 267	}
 268
 269done:
 270	mutex_unlock(&dev->phy_mutex);
 271}
 272
 273static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 274				   int idx)
 275{
 276	return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 277}
 278
 279static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 280				     int idx, int regval)
 281{
 282	__smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 283}
 284
 285static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 286{
 287	return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 288}
 289
 290static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 291				int regval)
 292{
 293	__smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 294}
 295
 296static int smsc75xx_wait_eeprom(struct usbnet *dev)
 297{
 298	unsigned long start_time = jiffies;
 299	u32 val;
 300	int ret;
 301
 302	do {
 303		ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 304		if (ret < 0) {
 305			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 306			return ret;
 307		}
 308
 309		if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 310			break;
 311		udelay(40);
 312	} while (!time_after(jiffies, start_time + HZ));
 313
 314	if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 315		netdev_warn(dev->net, "EEPROM read operation timeout\n");
 316		return -EIO;
 317	}
 318
 319	return 0;
 320}
 321
 322static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 323{
 324	unsigned long start_time = jiffies;
 325	u32 val;
 326	int ret;
 327
 328	do {
 329		ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 330		if (ret < 0) {
 331			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 332			return ret;
 333		}
 334
 335		if (!(val & E2P_CMD_BUSY))
 336			return 0;
 337
 338		udelay(40);
 339	} while (!time_after(jiffies, start_time + HZ));
 340
 341	netdev_warn(dev->net, "EEPROM is busy\n");
 342	return -EIO;
 343}
 344
 345static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 346				u8 *data)
 347{
 348	u32 val;
 349	int i, ret;
 350
 351	BUG_ON(!dev);
 352	BUG_ON(!data);
 353
 354	ret = smsc75xx_eeprom_confirm_not_busy(dev);
 355	if (ret)
 356		return ret;
 357
 358	for (i = 0; i < length; i++) {
 359		val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 360		ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 361		if (ret < 0) {
 362			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 363			return ret;
 364		}
 365
 366		ret = smsc75xx_wait_eeprom(dev);
 367		if (ret < 0)
 368			return ret;
 369
 370		ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 371		if (ret < 0) {
 372			netdev_warn(dev->net, "Error reading E2P_DATA\n");
 373			return ret;
 374		}
 375
 376		data[i] = val & 0xFF;
 377		offset++;
 378	}
 379
 380	return 0;
 381}
 382
 383static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 384				 u8 *data)
 385{
 386	u32 val;
 387	int i, ret;
 388
 389	BUG_ON(!dev);
 390	BUG_ON(!data);
 391
 392	ret = smsc75xx_eeprom_confirm_not_busy(dev);
 393	if (ret)
 394		return ret;
 395
 396	/* Issue write/erase enable command */
 397	val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 398	ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 399	if (ret < 0) {
 400		netdev_warn(dev->net, "Error writing E2P_CMD\n");
 401		return ret;
 402	}
 403
 404	ret = smsc75xx_wait_eeprom(dev);
 405	if (ret < 0)
 406		return ret;
 407
 408	for (i = 0; i < length; i++) {
 409
 410		/* Fill data register */
 411		val = data[i];
 412		ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 413		if (ret < 0) {
 414			netdev_warn(dev->net, "Error writing E2P_DATA\n");
 415			return ret;
 416		}
 417
 418		/* Send "write" command */
 419		val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 420		ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 421		if (ret < 0) {
 422			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 423			return ret;
 424		}
 425
 426		ret = smsc75xx_wait_eeprom(dev);
 427		if (ret < 0)
 428			return ret;
 429
 430		offset++;
 431	}
 432
 433	return 0;
 434}
 435
 436static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 437{
 438	int i, ret;
 439
 440	for (i = 0; i < 100; i++) {
 441		u32 dp_sel;
 442		ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 443		if (ret < 0) {
 444			netdev_warn(dev->net, "Error reading DP_SEL\n");
 445			return ret;
 446		}
 447
 448		if (dp_sel & DP_SEL_DPRDY)
 449			return 0;
 450
 451		udelay(40);
 452	}
 453
 454	netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 455
 456	return -EIO;
 457}
 458
 459static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 460				   u32 length, u32 *buf)
 461{
 462	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 463	u32 dp_sel;
 464	int i, ret;
 465
 466	mutex_lock(&pdata->dataport_mutex);
 467
 468	ret = smsc75xx_dataport_wait_not_busy(dev);
 469	if (ret < 0) {
 470		netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 471		goto done;
 472	}
 473
 474	ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 475	if (ret < 0) {
 476		netdev_warn(dev->net, "Error reading DP_SEL\n");
 477		goto done;
 478	}
 479
 480	dp_sel &= ~DP_SEL_RSEL;
 481	dp_sel |= ram_select;
 482	ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 483	if (ret < 0) {
 484		netdev_warn(dev->net, "Error writing DP_SEL\n");
 485		goto done;
 486	}
 487
 488	for (i = 0; i < length; i++) {
 489		ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 490		if (ret < 0) {
 491			netdev_warn(dev->net, "Error writing DP_ADDR\n");
 492			goto done;
 493		}
 494
 495		ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 496		if (ret < 0) {
 497			netdev_warn(dev->net, "Error writing DP_DATA\n");
 498			goto done;
 499		}
 500
 501		ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 502		if (ret < 0) {
 503			netdev_warn(dev->net, "Error writing DP_CMD\n");
 504			goto done;
 505		}
 506
 507		ret = smsc75xx_dataport_wait_not_busy(dev);
 508		if (ret < 0) {
 509			netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 510			goto done;
 511		}
 512	}
 513
 514done:
 515	mutex_unlock(&pdata->dataport_mutex);
 516	return ret;
 517}
 518
 519/* returns hash bit number for given MAC address */
 520static u32 smsc75xx_hash(char addr[ETH_ALEN])
 521{
 522	return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 523}
 524
 525static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 526{
 527	struct smsc75xx_priv *pdata =
 528		container_of(param, struct smsc75xx_priv, set_multicast);
 529	struct usbnet *dev = pdata->dev;
 530	int ret;
 531
 532	netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 533		  pdata->rfe_ctl);
 534
 535	smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 536		DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 537
 538	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 539	if (ret < 0)
 540		netdev_warn(dev->net, "Error writing RFE_CRL\n");
 541}
 542
 543static void smsc75xx_set_multicast(struct net_device *netdev)
 544{
 545	struct usbnet *dev = netdev_priv(netdev);
 546	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 547	unsigned long flags;
 548	int i;
 549
 550	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 551
 552	pdata->rfe_ctl &=
 553		~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 554	pdata->rfe_ctl |= RFE_CTL_AB;
 555
 556	for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 557		pdata->multicast_hash_table[i] = 0;
 558
 559	if (dev->net->flags & IFF_PROMISC) {
 560		netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 561		pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 562	} else if (dev->net->flags & IFF_ALLMULTI) {
 563		netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 564		pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 565	} else if (!netdev_mc_empty(dev->net)) {
 566		struct netdev_hw_addr *ha;
 567
 568		netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 569
 570		pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 571
 572		netdev_for_each_mc_addr(ha, netdev) {
 573			u32 bitnum = smsc75xx_hash(ha->addr);
 574			pdata->multicast_hash_table[bitnum / 32] |=
 575				(1 << (bitnum % 32));
 576		}
 577	} else {
 578		netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 579		pdata->rfe_ctl |= RFE_CTL_DPF;
 580	}
 581
 582	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 583
 584	/* defer register writes to a sleepable context */
 585	schedule_work(&pdata->set_multicast);
 586}
 587
 588static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 589					    u16 lcladv, u16 rmtadv)
 590{
 591	u32 flow = 0, fct_flow = 0;
 592	int ret;
 593
 594	if (duplex == DUPLEX_FULL) {
 595		u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 596
 597		if (cap & FLOW_CTRL_TX) {
 598			flow = (FLOW_TX_FCEN | 0xFFFF);
 599			/* set fct_flow thresholds to 20% and 80% */
 600			fct_flow = (8 << 8) | 32;
 601		}
 602
 603		if (cap & FLOW_CTRL_RX)
 604			flow |= FLOW_RX_FCEN;
 605
 606		netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 607			  (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 608			  (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 609	} else {
 610		netif_dbg(dev, link, dev->net, "half duplex\n");
 611	}
 612
 613	ret = smsc75xx_write_reg(dev, FLOW, flow);
 614	if (ret < 0) {
 615		netdev_warn(dev->net, "Error writing FLOW\n");
 616		return ret;
 617	}
 618
 619	ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 620	if (ret < 0) {
 621		netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 622		return ret;
 623	}
 624
 625	return 0;
 626}
 627
 628static int smsc75xx_link_reset(struct usbnet *dev)
 629{
 630	struct mii_if_info *mii = &dev->mii;
 631	struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 632	u16 lcladv, rmtadv;
 633	int ret;
 634
 635	/* write to clear phy interrupt status */
 636	smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 637		PHY_INT_SRC_CLEAR_ALL);
 638
 639	ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 640	if (ret < 0) {
 641		netdev_warn(dev->net, "Error writing INT_STS\n");
 642		return ret;
 643	}
 644
 645	mii_check_media(mii, 1, 1);
 646	mii_ethtool_gset(&dev->mii, &ecmd);
 647	lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 648	rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 649
 650	netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 651		  ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 652
 653	return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 654}
 655
 656static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 657{
 658	u32 intdata;
 659
 660	if (urb->actual_length != 4) {
 661		netdev_warn(dev->net, "unexpected urb length %d\n",
 662			    urb->actual_length);
 663		return;
 664	}
 665
 666	intdata = get_unaligned_le32(urb->transfer_buffer);
 667
 668	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 669
 670	if (intdata & INT_ENP_PHY_INT)
 671		usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 672	else
 673		netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 674			    intdata);
 675}
 676
 677static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 678{
 679	return MAX_EEPROM_SIZE;
 680}
 681
 682static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 683				       struct ethtool_eeprom *ee, u8 *data)
 684{
 685	struct usbnet *dev = netdev_priv(netdev);
 686
 687	ee->magic = LAN75XX_EEPROM_MAGIC;
 688
 689	return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 690}
 691
 692static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 693				       struct ethtool_eeprom *ee, u8 *data)
 694{
 695	struct usbnet *dev = netdev_priv(netdev);
 696
 697	if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 698		netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 699			    ee->magic);
 700		return -EINVAL;
 701	}
 702
 703	return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 704}
 705
 706static void smsc75xx_ethtool_get_wol(struct net_device *net,
 707				     struct ethtool_wolinfo *wolinfo)
 708{
 709	struct usbnet *dev = netdev_priv(net);
 710	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 711
 712	wolinfo->supported = SUPPORTED_WAKE;
 713	wolinfo->wolopts = pdata->wolopts;
 714}
 715
 716static int smsc75xx_ethtool_set_wol(struct net_device *net,
 717				    struct ethtool_wolinfo *wolinfo)
 718{
 719	struct usbnet *dev = netdev_priv(net);
 720	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 721	int ret;
 722
 723	if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 724		return -EINVAL;
 725
 726	pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 727
 728	ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 729	if (ret < 0)
 730		netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 731
 732	return ret;
 733}
 734
 735static const struct ethtool_ops smsc75xx_ethtool_ops = {
 736	.get_link	= usbnet_get_link,
 737	.nway_reset	= usbnet_nway_reset,
 738	.get_drvinfo	= usbnet_get_drvinfo,
 739	.get_msglevel	= usbnet_get_msglevel,
 740	.set_msglevel	= usbnet_set_msglevel,
 741	.get_eeprom_len	= smsc75xx_ethtool_get_eeprom_len,
 742	.get_eeprom	= smsc75xx_ethtool_get_eeprom,
 743	.set_eeprom	= smsc75xx_ethtool_set_eeprom,
 744	.get_wol	= smsc75xx_ethtool_get_wol,
 745	.set_wol	= smsc75xx_ethtool_set_wol,
 746	.get_link_ksettings	= usbnet_get_link_ksettings_mii,
 747	.set_link_ksettings	= usbnet_set_link_ksettings_mii,
 748};
 749
 750static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 751{
 752	struct usbnet *dev = netdev_priv(netdev);
 753
 754	if (!netif_running(netdev))
 755		return -EINVAL;
 756
 757	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 758}
 759
 760static void smsc75xx_init_mac_address(struct usbnet *dev)
 761{
 762	u8 addr[ETH_ALEN];
 763
 764	/* maybe the boot loader passed the MAC address in devicetree */
 765	if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
 766		if (is_valid_ether_addr(dev->net->dev_addr)) {
 767			/* device tree values are valid so use them */
 768			netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
 769			return;
 770		}
 771	}
 772
 773	/* try reading mac address from EEPROM */
 774	if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
 775		eth_hw_addr_set(dev->net, addr);
 776		if (is_valid_ether_addr(dev->net->dev_addr)) {
 777			/* eeprom values are valid so use them */
 778			netif_dbg(dev, ifup, dev->net,
 779				  "MAC address read from EEPROM\n");
 780			return;
 781		}
 782	}
 783
 784	/* no useful static MAC address found. generate a random one */
 785	eth_hw_addr_random(dev->net);
 786	netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 787}
 788
 789static int smsc75xx_set_mac_address(struct usbnet *dev)
 790{
 791	u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 792		dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 793	u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 794
 795	int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 796	if (ret < 0) {
 797		netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 798		return ret;
 799	}
 800
 801	ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 802	if (ret < 0) {
 803		netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 804		return ret;
 805	}
 806
 807	addr_hi |= ADDR_FILTX_FB_VALID;
 808	ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 809	if (ret < 0) {
 810		netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 811		return ret;
 812	}
 813
 814	ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 815	if (ret < 0)
 816		netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 817
 818	return ret;
 819}
 820
 821static int smsc75xx_phy_initialize(struct usbnet *dev)
 822{
 823	int bmcr, ret, timeout = 0;
 824
 825	/* Initialize MII structure */
 826	dev->mii.dev = dev->net;
 827	dev->mii.mdio_read = smsc75xx_mdio_read;
 828	dev->mii.mdio_write = smsc75xx_mdio_write;
 829	dev->mii.phy_id_mask = 0x1f;
 830	dev->mii.reg_num_mask = 0x1f;
 831	dev->mii.supports_gmii = 1;
 832	dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 833
 834	/* reset phy and wait for reset to complete */
 835	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 836
 837	do {
 838		msleep(10);
 839		bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 840		if (bmcr < 0) {
 841			netdev_warn(dev->net, "Error reading MII_BMCR\n");
 842			return bmcr;
 843		}
 844		timeout++;
 845	} while ((bmcr & BMCR_RESET) && (timeout < 100));
 846
 847	if (timeout >= 100) {
 848		netdev_warn(dev->net, "timeout on PHY Reset\n");
 849		return -EIO;
 850	}
 851
 852	/* phy workaround for gig link */
 853	smsc75xx_phy_gig_workaround(dev);
 854
 855	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 856		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 857		ADVERTISE_PAUSE_ASYM);
 858	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 859		ADVERTISE_1000FULL);
 860
 861	/* read and write to clear phy interrupt status */
 862	ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 863	if (ret < 0) {
 864		netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 865		return ret;
 866	}
 867
 868	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 869
 870	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 871		PHY_INT_MASK_DEFAULT);
 872	mii_nway_restart(&dev->mii);
 873
 874	netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 875	return 0;
 876}
 877
 878static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 879{
 880	int ret = 0;
 881	u32 buf;
 882	bool rxenabled;
 883
 884	ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 885	if (ret < 0) {
 886		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 887		return ret;
 888	}
 889
 890	rxenabled = ((buf & MAC_RX_RXEN) != 0);
 891
 892	if (rxenabled) {
 893		buf &= ~MAC_RX_RXEN;
 894		ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 895		if (ret < 0) {
 896			netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 897			return ret;
 898		}
 899	}
 900
 901	/* add 4 to size for FCS */
 902	buf &= ~MAC_RX_MAX_SIZE;
 903	buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 904
 905	ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 906	if (ret < 0) {
 907		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 908		return ret;
 909	}
 910
 911	if (rxenabled) {
 912		buf |= MAC_RX_RXEN;
 913		ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 914		if (ret < 0) {
 915			netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 916			return ret;
 917		}
 918	}
 919
 920	return 0;
 921}
 922
 923static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 924{
 925	struct usbnet *dev = netdev_priv(netdev);
 926	int ret;
 927
 928	ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 929	if (ret < 0) {
 930		netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 931		return ret;
 932	}
 933
 934	return usbnet_change_mtu(netdev, new_mtu);
 935}
 936
 937/* Enable or disable Rx checksum offload engine */
 938static int smsc75xx_set_features(struct net_device *netdev,
 939	netdev_features_t features)
 940{
 941	struct usbnet *dev = netdev_priv(netdev);
 942	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 943	unsigned long flags;
 944	int ret;
 945
 946	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 947
 948	if (features & NETIF_F_RXCSUM)
 949		pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 950	else
 951		pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 952
 953	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 954	/* it's racing here! */
 955
 956	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 957	if (ret < 0) {
 958		netdev_warn(dev->net, "Error writing RFE_CTL\n");
 959		return ret;
 960	}
 961	return 0;
 962}
 963
 964static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 965{
 966	int timeout = 0;
 967
 968	do {
 969		u32 buf;
 970		int ret;
 971
 972		ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 973
 974		if (ret < 0) {
 975			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 976			return ret;
 977		}
 978
 979		if (buf & PMT_CTL_DEV_RDY)
 980			return 0;
 981
 982		msleep(10);
 983		timeout++;
 984	} while (timeout < 100);
 985
 986	netdev_warn(dev->net, "timeout waiting for device ready\n");
 987	return -EIO;
 988}
 989
 990static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
 991{
 992	struct mii_if_info *mii = &dev->mii;
 993	int ret = 0, timeout = 0;
 994	u32 buf, link_up = 0;
 995
 996	/* Set the phy in Gig loopback */
 997	smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
 998
 999	/* Wait for the link up */
1000	do {
1001		link_up = smsc75xx_link_ok_nopm(dev);
1002		usleep_range(10000, 20000);
1003		timeout++;
1004	} while ((!link_up) && (timeout < 1000));
1005
1006	if (timeout >= 1000) {
1007		netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1008		return -EIO;
1009	}
1010
1011	/* phy reset */
1012	ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1013	if (ret < 0) {
1014		netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1015		return ret;
1016	}
1017
1018	buf |= PMT_CTL_PHY_RST;
1019
1020	ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1021	if (ret < 0) {
1022		netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1023		return ret;
1024	}
1025
1026	timeout = 0;
1027	do {
1028		usleep_range(10000, 20000);
1029		ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1030		if (ret < 0) {
1031			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1032				    ret);
1033			return ret;
1034		}
1035		timeout++;
1036	} while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1037
1038	if (timeout >= 100) {
1039		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1040		return -EIO;
1041	}
1042
1043	return 0;
1044}
1045
1046static int smsc75xx_reset(struct usbnet *dev)
1047{
1048	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1049	u32 buf;
1050	int ret = 0, timeout;
1051
1052	netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1053
1054	ret = smsc75xx_wait_ready(dev, 0);
1055	if (ret < 0) {
1056		netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1057		return ret;
1058	}
1059
1060	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1061	if (ret < 0) {
1062		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1063		return ret;
1064	}
1065
1066	buf |= HW_CFG_LRST;
1067
1068	ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1069	if (ret < 0) {
1070		netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1071		return ret;
1072	}
1073
1074	timeout = 0;
1075	do {
1076		msleep(10);
1077		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1078		if (ret < 0) {
1079			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1080			return ret;
1081		}
1082		timeout++;
1083	} while ((buf & HW_CFG_LRST) && (timeout < 100));
1084
1085	if (timeout >= 100) {
1086		netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1087		return -EIO;
1088	}
1089
1090	netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1091
1092	ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1093	if (ret < 0) {
1094		netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1095		return ret;
1096	}
1097
1098	buf |= PMT_CTL_PHY_RST;
1099
1100	ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1101	if (ret < 0) {
1102		netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1103		return ret;
1104	}
1105
1106	timeout = 0;
1107	do {
1108		msleep(10);
1109		ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1110		if (ret < 0) {
1111			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1112			return ret;
1113		}
1114		timeout++;
1115	} while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1116
1117	if (timeout >= 100) {
1118		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1119		return -EIO;
1120	}
1121
1122	netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1123
1124	ret = smsc75xx_set_mac_address(dev);
1125	if (ret < 0) {
1126		netdev_warn(dev->net, "Failed to set mac address\n");
1127		return ret;
1128	}
1129
1130	netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1131		  dev->net->dev_addr);
1132
1133	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1134	if (ret < 0) {
1135		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1136		return ret;
1137	}
1138
1139	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1140		  buf);
1141
1142	buf |= HW_CFG_BIR;
1143
1144	ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1145	if (ret < 0) {
1146		netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1147		return ret;
1148	}
1149
1150	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1151	if (ret < 0) {
1152		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1153		return ret;
1154	}
1155
1156	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1157		  buf);
1158
1159	if (!turbo_mode) {
1160		buf = 0;
1161		dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1162	} else if (dev->udev->speed == USB_SPEED_HIGH) {
1163		buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1164		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1165	} else {
1166		buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1167		dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1168	}
1169
1170	netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1171		  (ulong)dev->rx_urb_size);
1172
1173	ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1174	if (ret < 0) {
1175		netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1176		return ret;
1177	}
1178
1179	ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1180	if (ret < 0) {
1181		netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1182		return ret;
1183	}
1184
1185	netif_dbg(dev, ifup, dev->net,
1186		  "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1187
1188	ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1189	if (ret < 0) {
1190		netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1191		return ret;
1192	}
1193
1194	ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1195	if (ret < 0) {
1196		netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1197		return ret;
1198	}
1199
1200	netif_dbg(dev, ifup, dev->net,
1201		  "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1202
1203	if (turbo_mode) {
1204		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1205		if (ret < 0) {
1206			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1207			return ret;
1208		}
1209
1210		netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1211
1212		buf |= (HW_CFG_MEF | HW_CFG_BCE);
1213
1214		ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1215		if (ret < 0) {
1216			netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1217			return ret;
1218		}
1219
1220		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1221		if (ret < 0) {
1222			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1223			return ret;
1224		}
1225
1226		netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1227	}
1228
1229	/* set FIFO sizes */
1230	buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1231	ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1232	if (ret < 0) {
1233		netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1234		return ret;
1235	}
1236
1237	netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1238
1239	buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1240	ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1241	if (ret < 0) {
1242		netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1243		return ret;
1244	}
1245
1246	netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1247
1248	ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1249	if (ret < 0) {
1250		netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1251		return ret;
1252	}
1253
1254	ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1255	if (ret < 0) {
1256		netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1257		return ret;
1258	}
1259
1260	netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1261
1262	ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1263	if (ret < 0) {
1264		netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1265		return ret;
1266	}
1267
1268	/* only set default GPIO/LED settings if no EEPROM is detected */
1269	if (!(buf & E2P_CMD_LOADED)) {
1270		ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1271		if (ret < 0) {
1272			netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1273			return ret;
1274		}
1275
1276		buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1277		buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1278
1279		ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1280		if (ret < 0) {
1281			netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1282			return ret;
1283		}
1284	}
1285
1286	ret = smsc75xx_write_reg(dev, FLOW, 0);
1287	if (ret < 0) {
1288		netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1289		return ret;
1290	}
1291
1292	ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1293	if (ret < 0) {
1294		netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1295		return ret;
1296	}
1297
1298	/* Don't need rfe_ctl_lock during initialisation */
1299	ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1300	if (ret < 0) {
1301		netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1302		return ret;
1303	}
1304
1305	pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1306
1307	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1308	if (ret < 0) {
1309		netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1310		return ret;
1311	}
1312
1313	ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1314	if (ret < 0) {
1315		netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1316		return ret;
1317	}
1318
1319	netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1320		  pdata->rfe_ctl);
1321
1322	/* Enable or disable checksum offload engines */
1323	smsc75xx_set_features(dev->net, dev->net->features);
1324
1325	smsc75xx_set_multicast(dev->net);
1326
1327	ret = smsc75xx_phy_initialize(dev);
1328	if (ret < 0) {
1329		netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1330		return ret;
1331	}
1332
1333	ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1334	if (ret < 0) {
1335		netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1336		return ret;
1337	}
1338
1339	/* enable PHY interrupts */
1340	buf |= INT_ENP_PHY_INT;
1341
1342	ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1343	if (ret < 0) {
1344		netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1345		return ret;
1346	}
1347
1348	/* allow mac to detect speed and duplex from phy */
1349	ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1350	if (ret < 0) {
1351		netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1352		return ret;
1353	}
1354
1355	buf |= (MAC_CR_ADD | MAC_CR_ASD);
1356	ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1357	if (ret < 0) {
1358		netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1359		return ret;
1360	}
1361
1362	ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1363	if (ret < 0) {
1364		netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1365		return ret;
1366	}
1367
1368	buf |= MAC_TX_TXEN;
1369
1370	ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1371	if (ret < 0) {
1372		netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1373		return ret;
1374	}
1375
1376	netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1377
1378	ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1379	if (ret < 0) {
1380		netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1381		return ret;
1382	}
1383
1384	buf |= FCT_TX_CTL_EN;
1385
1386	ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1387	if (ret < 0) {
1388		netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1389		return ret;
1390	}
1391
1392	netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1393
1394	ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1395	if (ret < 0) {
1396		netdev_warn(dev->net, "Failed to set max rx frame length\n");
1397		return ret;
1398	}
1399
1400	ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1401	if (ret < 0) {
1402		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1403		return ret;
1404	}
1405
1406	buf |= MAC_RX_RXEN;
1407
1408	ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1409	if (ret < 0) {
1410		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1411		return ret;
1412	}
1413
1414	netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1415
1416	ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1417	if (ret < 0) {
1418		netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1419		return ret;
1420	}
1421
1422	buf |= FCT_RX_CTL_EN;
1423
1424	ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1425	if (ret < 0) {
1426		netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1427		return ret;
1428	}
1429
1430	netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1431
1432	netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1433	return 0;
1434}
1435
1436static const struct net_device_ops smsc75xx_netdev_ops = {
1437	.ndo_open		= usbnet_open,
1438	.ndo_stop		= usbnet_stop,
1439	.ndo_start_xmit		= usbnet_start_xmit,
1440	.ndo_tx_timeout		= usbnet_tx_timeout,
1441	.ndo_get_stats64	= dev_get_tstats64,
1442	.ndo_change_mtu		= smsc75xx_change_mtu,
1443	.ndo_set_mac_address 	= eth_mac_addr,
1444	.ndo_validate_addr	= eth_validate_addr,
1445	.ndo_eth_ioctl		= smsc75xx_ioctl,
1446	.ndo_set_rx_mode	= smsc75xx_set_multicast,
1447	.ndo_set_features	= smsc75xx_set_features,
1448};
1449
1450static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1451{
1452	struct smsc75xx_priv *pdata = NULL;
1453	int ret;
1454
1455	printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1456
1457	ret = usbnet_get_endpoints(dev, intf);
1458	if (ret < 0) {
1459		netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1460		return ret;
1461	}
1462
1463	dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1464					      GFP_KERNEL);
1465
1466	pdata = (struct smsc75xx_priv *)(dev->data[0]);
1467	if (!pdata)
1468		return -ENOMEM;
1469
1470	pdata->dev = dev;
1471
1472	spin_lock_init(&pdata->rfe_ctl_lock);
1473	mutex_init(&pdata->dataport_mutex);
1474
1475	INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1476
1477	if (DEFAULT_TX_CSUM_ENABLE)
1478		dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1479
1480	if (DEFAULT_RX_CSUM_ENABLE)
1481		dev->net->features |= NETIF_F_RXCSUM;
1482
1483	dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1484				NETIF_F_RXCSUM;
1485
1486	ret = smsc75xx_wait_ready(dev, 0);
1487	if (ret < 0) {
1488		netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1489		goto free_pdata;
1490	}
1491
1492	smsc75xx_init_mac_address(dev);
1493
1494	/* Init all registers */
1495	ret = smsc75xx_reset(dev);
1496	if (ret < 0) {
1497		netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1498		goto cancel_work;
1499	}
1500
1501	dev->net->netdev_ops = &smsc75xx_netdev_ops;
1502	dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1503	dev->net->flags |= IFF_MULTICAST;
1504	dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1505	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1506	dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1507	return 0;
1508
1509cancel_work:
1510	cancel_work_sync(&pdata->set_multicast);
1511free_pdata:
1512	kfree(pdata);
1513	dev->data[0] = 0;
1514	return ret;
1515}
1516
1517static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1518{
1519	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1520	if (pdata) {
1521		cancel_work_sync(&pdata->set_multicast);
1522		netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1523		kfree(pdata);
1524		dev->data[0] = 0;
1525	}
1526}
1527
1528static u16 smsc_crc(const u8 *buffer, size_t len)
1529{
1530	return bitrev16(crc16(0xFFFF, buffer, len));
1531}
1532
1533static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1534			       u32 wuf_mask1)
1535{
1536	int cfg_base = WUF_CFGX + filter * 4;
1537	int mask_base = WUF_MASKX + filter * 16;
1538	int ret;
1539
1540	ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1541	if (ret < 0) {
1542		netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1543		return ret;
1544	}
1545
1546	ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1547	if (ret < 0) {
1548		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1549		return ret;
1550	}
1551
1552	ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1553	if (ret < 0) {
1554		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1555		return ret;
1556	}
1557
1558	ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1559	if (ret < 0) {
1560		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1561		return ret;
1562	}
1563
1564	ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1565	if (ret < 0) {
1566		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1567		return ret;
1568	}
1569
1570	return 0;
1571}
1572
1573static int smsc75xx_enter_suspend0(struct usbnet *dev)
1574{
1575	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1576	u32 val;
1577	int ret;
1578
1579	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1580	if (ret < 0) {
1581		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1582		return ret;
1583	}
1584
1585	val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1586	val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1587
1588	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1589	if (ret < 0) {
1590		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1591		return ret;
1592	}
1593
1594	pdata->suspend_flags |= SUSPEND_SUSPEND0;
1595
1596	return 0;
1597}
1598
1599static int smsc75xx_enter_suspend1(struct usbnet *dev)
1600{
1601	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1602	u32 val;
1603	int ret;
1604
1605	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1606	if (ret < 0) {
1607		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1608		return ret;
1609	}
1610
1611	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1612	val |= PMT_CTL_SUS_MODE_1;
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	/* clear wol status, enable energy detection */
1621	val &= ~PMT_CTL_WUPS;
1622	val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1623
1624	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1625	if (ret < 0) {
1626		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1627		return ret;
1628	}
1629
1630	pdata->suspend_flags |= SUSPEND_SUSPEND1;
1631
1632	return 0;
1633}
1634
1635static int smsc75xx_enter_suspend2(struct usbnet *dev)
1636{
1637	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1638	u32 val;
1639	int ret;
1640
1641	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1642	if (ret < 0) {
1643		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1644		return ret;
1645	}
1646
1647	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1648	val |= PMT_CTL_SUS_MODE_2;
1649
1650	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1651	if (ret < 0) {
1652		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1653		return ret;
1654	}
1655
1656	pdata->suspend_flags |= SUSPEND_SUSPEND2;
1657
1658	return 0;
1659}
1660
1661static int smsc75xx_enter_suspend3(struct usbnet *dev)
1662{
1663	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1664	u32 val;
1665	int ret;
1666
1667	ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1668	if (ret < 0) {
1669		netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1670		return ret;
1671	}
1672
1673	if (val & FCT_RX_CTL_RXUSED) {
1674		netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1675		return -EBUSY;
1676	}
1677
1678	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1679	if (ret < 0) {
1680		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1681		return ret;
1682	}
1683
1684	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1685	val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
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	/* clear wol status */
1694	val &= ~PMT_CTL_WUPS;
1695	val |= PMT_CTL_WUPS_WOL;
1696
1697	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1698	if (ret < 0) {
1699		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1700		return ret;
1701	}
1702
1703	pdata->suspend_flags |= SUSPEND_SUSPEND3;
1704
1705	return 0;
1706}
1707
1708static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1709{
1710	struct mii_if_info *mii = &dev->mii;
1711	int ret;
1712
1713	netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1714
1715	/* read to clear */
1716	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1717	if (ret < 0) {
1718		netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1719		return ret;
1720	}
1721
1722	/* enable interrupt source */
1723	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1724	if (ret < 0) {
1725		netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1726		return ret;
1727	}
1728
1729	ret |= mask;
1730
1731	smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1732
1733	return 0;
1734}
1735
1736static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1737{
1738	struct mii_if_info *mii = &dev->mii;
1739	int ret;
1740
1741	/* first, a dummy read, needed to latch some MII phys */
1742	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1743	if (ret < 0) {
1744		netdev_warn(dev->net, "Error reading MII_BMSR\n");
1745		return ret;
1746	}
1747
1748	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1749	if (ret < 0) {
1750		netdev_warn(dev->net, "Error reading MII_BMSR\n");
1751		return ret;
1752	}
1753
1754	return !!(ret & BMSR_LSTATUS);
1755}
1756
1757static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1758{
1759	int ret;
1760
1761	if (!netif_running(dev->net)) {
1762		/* interface is ifconfig down so fully power down hw */
1763		netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1764		return smsc75xx_enter_suspend2(dev);
1765	}
1766
1767	if (!link_up) {
1768		/* link is down so enter EDPD mode */
1769		netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1770
1771		/* enable PHY wakeup events for if cable is attached */
1772		ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1773			PHY_INT_MASK_ANEG_COMP);
1774		if (ret < 0) {
1775			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1776			return ret;
1777		}
1778
1779		netdev_info(dev->net, "entering SUSPEND1 mode\n");
1780		return smsc75xx_enter_suspend1(dev);
1781	}
1782
1783	/* enable PHY wakeup events so we remote wakeup if cable is pulled */
1784	ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1785		PHY_INT_MASK_LINK_DOWN);
1786	if (ret < 0) {
1787		netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1788		return ret;
1789	}
1790
1791	netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1792	return smsc75xx_enter_suspend3(dev);
1793}
1794
1795static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1796{
1797	struct usbnet *dev = usb_get_intfdata(intf);
1798	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1799	u32 val, link_up;
1800	int ret;
1801
1802	ret = usbnet_suspend(intf, message);
1803	if (ret < 0) {
1804		netdev_warn(dev->net, "usbnet_suspend error\n");
1805		return ret;
1806	}
1807
1808	if (pdata->suspend_flags) {
1809		netdev_warn(dev->net, "error during last resume\n");
1810		pdata->suspend_flags = 0;
1811	}
1812
1813	/* determine if link is up using only _nopm functions */
1814	link_up = smsc75xx_link_ok_nopm(dev);
1815
1816	if (message.event == PM_EVENT_AUTO_SUSPEND) {
1817		ret = smsc75xx_autosuspend(dev, link_up);
1818		goto done;
1819	}
1820
1821	/* if we get this far we're not autosuspending */
1822	/* if no wol options set, or if link is down and we're not waking on
1823	 * PHY activity, enter lowest power SUSPEND2 mode
1824	 */
1825	if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1826		!(link_up || (pdata->wolopts & WAKE_PHY))) {
1827		netdev_info(dev->net, "entering SUSPEND2 mode\n");
1828
1829		/* disable energy detect (link up) & wake up events */
1830		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1831		if (ret < 0) {
1832			netdev_warn(dev->net, "Error reading WUCSR\n");
1833			goto done;
1834		}
1835
1836		val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1837
1838		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1839		if (ret < 0) {
1840			netdev_warn(dev->net, "Error writing WUCSR\n");
1841			goto done;
1842		}
1843
1844		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1845		if (ret < 0) {
1846			netdev_warn(dev->net, "Error reading PMT_CTL\n");
1847			goto done;
1848		}
1849
1850		val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1851
1852		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1853		if (ret < 0) {
1854			netdev_warn(dev->net, "Error writing PMT_CTL\n");
1855			goto done;
1856		}
1857
1858		ret = smsc75xx_enter_suspend2(dev);
1859		goto done;
1860	}
1861
1862	if (pdata->wolopts & WAKE_PHY) {
1863		ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1864			(PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1865		if (ret < 0) {
1866			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1867			goto done;
1868		}
1869
1870		/* if link is down then configure EDPD and enter SUSPEND1,
1871		 * otherwise enter SUSPEND0 below
1872		 */
1873		if (!link_up) {
1874			struct mii_if_info *mii = &dev->mii;
1875			netdev_info(dev->net, "entering SUSPEND1 mode\n");
1876
1877			/* enable energy detect power-down mode */
1878			ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1879				PHY_MODE_CTRL_STS);
1880			if (ret < 0) {
1881				netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1882				goto done;
1883			}
1884
1885			ret |= MODE_CTRL_STS_EDPWRDOWN;
1886
1887			smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1888				PHY_MODE_CTRL_STS, ret);
1889
1890			/* enter SUSPEND1 mode */
1891			ret = smsc75xx_enter_suspend1(dev);
1892			goto done;
1893		}
1894	}
1895
1896	if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1897		int i, filter = 0;
1898
1899		/* disable all filters */
1900		for (i = 0; i < WUF_NUM; i++) {
1901			ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1902			if (ret < 0) {
1903				netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1904				goto done;
1905			}
1906		}
1907
1908		if (pdata->wolopts & WAKE_MCAST) {
1909			const u8 mcast[] = {0x01, 0x00, 0x5E};
1910			netdev_info(dev->net, "enabling multicast detection\n");
1911
1912			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1913				| smsc_crc(mcast, 3);
1914			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1915			if (ret < 0) {
1916				netdev_warn(dev->net, "Error writing wakeup filter\n");
1917				goto done;
1918			}
1919		}
1920
1921		if (pdata->wolopts & WAKE_ARP) {
1922			const u8 arp[] = {0x08, 0x06};
1923			netdev_info(dev->net, "enabling ARP detection\n");
1924
1925			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1926				| smsc_crc(arp, 2);
1927			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1928			if (ret < 0) {
1929				netdev_warn(dev->net, "Error writing wakeup filter\n");
1930				goto done;
1931			}
1932		}
1933
1934		/* clear any pending pattern match packet status */
1935		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1936		if (ret < 0) {
1937			netdev_warn(dev->net, "Error reading WUCSR\n");
1938			goto done;
1939		}
1940
1941		val |= WUCSR_WUFR;
1942
1943		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1944		if (ret < 0) {
1945			netdev_warn(dev->net, "Error writing WUCSR\n");
1946			goto done;
1947		}
1948
1949		netdev_info(dev->net, "enabling packet match detection\n");
1950		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1951		if (ret < 0) {
1952			netdev_warn(dev->net, "Error reading WUCSR\n");
1953			goto done;
1954		}
1955
1956		val |= WUCSR_WUEN;
1957
1958		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1959		if (ret < 0) {
1960			netdev_warn(dev->net, "Error writing WUCSR\n");
1961			goto done;
1962		}
1963	} else {
1964		netdev_info(dev->net, "disabling packet match detection\n");
1965		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1966		if (ret < 0) {
1967			netdev_warn(dev->net, "Error reading WUCSR\n");
1968			goto done;
1969		}
1970
1971		val &= ~WUCSR_WUEN;
1972
1973		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1974		if (ret < 0) {
1975			netdev_warn(dev->net, "Error writing WUCSR\n");
1976			goto done;
1977		}
1978	}
1979
1980	/* disable magic, bcast & unicast wakeup sources */
1981	ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1982	if (ret < 0) {
1983		netdev_warn(dev->net, "Error reading WUCSR\n");
1984		goto done;
1985	}
1986
1987	val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1988
1989	ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1990	if (ret < 0) {
1991		netdev_warn(dev->net, "Error writing WUCSR\n");
1992		goto done;
1993	}
1994
1995	if (pdata->wolopts & WAKE_PHY) {
1996		netdev_info(dev->net, "enabling PHY wakeup\n");
1997
1998		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1999		if (ret < 0) {
2000			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2001			goto done;
2002		}
2003
2004		/* clear wol status, enable energy detection */
2005		val &= ~PMT_CTL_WUPS;
2006		val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2007
2008		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2009		if (ret < 0) {
2010			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2011			goto done;
2012		}
2013	}
2014
2015	if (pdata->wolopts & WAKE_MAGIC) {
2016		netdev_info(dev->net, "enabling magic packet wakeup\n");
2017		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2018		if (ret < 0) {
2019			netdev_warn(dev->net, "Error reading WUCSR\n");
2020			goto done;
2021		}
2022
2023		/* clear any pending magic packet status */
2024		val |= WUCSR_MPR | WUCSR_MPEN;
2025
2026		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2027		if (ret < 0) {
2028			netdev_warn(dev->net, "Error writing WUCSR\n");
2029			goto done;
2030		}
2031	}
2032
2033	if (pdata->wolopts & WAKE_BCAST) {
2034		netdev_info(dev->net, "enabling broadcast detection\n");
2035		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2036		if (ret < 0) {
2037			netdev_warn(dev->net, "Error reading WUCSR\n");
2038			goto done;
2039		}
2040
2041		val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2042
2043		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2044		if (ret < 0) {
2045			netdev_warn(dev->net, "Error writing WUCSR\n");
2046			goto done;
2047		}
2048	}
2049
2050	if (pdata->wolopts & WAKE_UCAST) {
2051		netdev_info(dev->net, "enabling unicast detection\n");
2052		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2053		if (ret < 0) {
2054			netdev_warn(dev->net, "Error reading WUCSR\n");
2055			goto done;
2056		}
2057
2058		val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2059
2060		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2061		if (ret < 0) {
2062			netdev_warn(dev->net, "Error writing WUCSR\n");
2063			goto done;
2064		}
2065	}
2066
2067	/* enable receiver to enable frame reception */
2068	ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2069	if (ret < 0) {
2070		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2071		goto done;
2072	}
2073
2074	val |= MAC_RX_RXEN;
2075
2076	ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2077	if (ret < 0) {
2078		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2079		goto done;
2080	}
2081
2082	/* some wol options are enabled, so enter SUSPEND0 */
2083	netdev_info(dev->net, "entering SUSPEND0 mode\n");
2084	ret = smsc75xx_enter_suspend0(dev);
2085
2086done:
2087	/*
2088	 * TODO: resume() might need to handle the suspend failure
2089	 * in system sleep
2090	 */
2091	if (ret && PMSG_IS_AUTO(message))
2092		usbnet_resume(intf);
2093	return ret;
2094}
2095
2096static int smsc75xx_resume(struct usb_interface *intf)
2097{
2098	struct usbnet *dev = usb_get_intfdata(intf);
2099	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2100	u8 suspend_flags = pdata->suspend_flags;
2101	int ret;
2102	u32 val;
2103
2104	netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2105
2106	/* do this first to ensure it's cleared even in error case */
2107	pdata->suspend_flags = 0;
2108
2109	if (suspend_flags & SUSPEND_ALLMODES) {
2110		/* Disable wakeup sources */
2111		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2112		if (ret < 0) {
2113			netdev_warn(dev->net, "Error reading WUCSR\n");
2114			return ret;
2115		}
2116
2117		val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2118			| WUCSR_BCST_EN);
2119
2120		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2121		if (ret < 0) {
2122			netdev_warn(dev->net, "Error writing WUCSR\n");
2123			return ret;
2124		}
2125
2126		/* clear wake-up status */
2127		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2128		if (ret < 0) {
2129			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2130			return ret;
2131		}
2132
2133		val &= ~PMT_CTL_WOL_EN;
2134		val |= PMT_CTL_WUPS;
2135
2136		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2137		if (ret < 0) {
2138			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2139			return ret;
2140		}
2141	}
2142
2143	if (suspend_flags & SUSPEND_SUSPEND2) {
2144		netdev_info(dev->net, "resuming from SUSPEND2\n");
2145
2146		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2147		if (ret < 0) {
2148			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2149			return ret;
2150		}
2151
2152		val |= PMT_CTL_PHY_PWRUP;
2153
2154		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2155		if (ret < 0) {
2156			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2157			return ret;
2158		}
2159	}
2160
2161	ret = smsc75xx_wait_ready(dev, 1);
2162	if (ret < 0) {
2163		netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2164		return ret;
2165	}
2166
2167	return usbnet_resume(intf);
2168}
2169
2170static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2171				     u32 rx_cmd_a, u32 rx_cmd_b)
2172{
2173	if (!(dev->net->features & NETIF_F_RXCSUM) ||
2174	    unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2175		skb->ip_summed = CHECKSUM_NONE;
2176	} else {
2177		skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2178		skb->ip_summed = CHECKSUM_COMPLETE;
2179	}
2180}
2181
2182static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2183{
2184	/* This check is no longer done by usbnet */
2185	if (skb->len < dev->net->hard_header_len)
2186		return 0;
2187
2188	while (skb->len > 0) {
2189		u32 rx_cmd_a, rx_cmd_b, align_count, size;
2190		struct sk_buff *ax_skb;
2191		unsigned char *packet;
2192
2193		rx_cmd_a = get_unaligned_le32(skb->data);
2194		skb_pull(skb, 4);
2195
2196		rx_cmd_b = get_unaligned_le32(skb->data);
2197		skb_pull(skb, 4 + RXW_PADDING);
2198
2199		packet = skb->data;
2200
2201		/* get the packet length */
2202		size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2203		align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2204
2205		if (unlikely(size > skb->len)) {
2206			netif_dbg(dev, rx_err, dev->net,
2207				  "size err rx_cmd_a=0x%08x\n",
2208				  rx_cmd_a);
2209			return 0;
2210		}
2211
2212		if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2213			netif_dbg(dev, rx_err, dev->net,
2214				  "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2215			dev->net->stats.rx_errors++;
2216			dev->net->stats.rx_dropped++;
2217
2218			if (rx_cmd_a & RX_CMD_A_FCS)
2219				dev->net->stats.rx_crc_errors++;
2220			else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2221				dev->net->stats.rx_frame_errors++;
2222		} else {
2223			/* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2224			if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2225				netif_dbg(dev, rx_err, dev->net,
2226					  "size err rx_cmd_a=0x%08x\n",
2227					  rx_cmd_a);
2228				return 0;
2229			}
2230
2231			/* last frame in this batch */
2232			if (skb->len == size) {
2233				smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2234					rx_cmd_b);
2235
2236				skb_trim(skb, skb->len - 4); /* remove fcs */
2237				skb->truesize = size + sizeof(struct sk_buff);
2238
2239				return 1;
2240			}
2241
2242			ax_skb = skb_clone(skb, GFP_ATOMIC);
2243			if (unlikely(!ax_skb)) {
2244				netdev_warn(dev->net, "Error allocating skb\n");
2245				return 0;
2246			}
2247
2248			ax_skb->len = size;
2249			ax_skb->data = packet;
2250			skb_set_tail_pointer(ax_skb, size);
2251
2252			smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2253				rx_cmd_b);
2254
2255			skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2256			ax_skb->truesize = size + sizeof(struct sk_buff);
2257
2258			usbnet_skb_return(dev, ax_skb);
2259		}
2260
2261		skb_pull(skb, size);
2262
2263		/* padding bytes before the next frame starts */
2264		if (skb->len)
2265			skb_pull(skb, align_count);
2266	}
2267
2268	return 1;
2269}
2270
2271static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2272					 struct sk_buff *skb, gfp_t flags)
2273{
2274	u32 tx_cmd_a, tx_cmd_b;
2275	void *ptr;
2276
2277	if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2278		dev_kfree_skb_any(skb);
2279		return NULL;
2280	}
2281
2282	tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2283
2284	if (skb->ip_summed == CHECKSUM_PARTIAL)
2285		tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2286
2287	if (skb_is_gso(skb)) {
2288		u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2289		tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2290
2291		tx_cmd_a |= TX_CMD_A_LSO;
2292	} else {
2293		tx_cmd_b = 0;
2294	}
2295
2296	ptr = skb_push(skb, 8);
2297	put_unaligned_le32(tx_cmd_a, ptr);
2298	put_unaligned_le32(tx_cmd_b, ptr + 4);
2299
2300	return skb;
2301}
2302
2303static int smsc75xx_manage_power(struct usbnet *dev, int on)
2304{
2305	dev->intf->needs_remote_wakeup = on;
2306	return 0;
2307}
2308
2309static const struct driver_info smsc75xx_info = {
2310	.description	= "smsc75xx USB 2.0 Gigabit Ethernet",
2311	.bind		= smsc75xx_bind,
2312	.unbind		= smsc75xx_unbind,
2313	.link_reset	= smsc75xx_link_reset,
2314	.reset		= smsc75xx_reset,
2315	.rx_fixup	= smsc75xx_rx_fixup,
2316	.tx_fixup	= smsc75xx_tx_fixup,
2317	.status		= smsc75xx_status,
2318	.manage_power	= smsc75xx_manage_power,
2319	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2320};
2321
2322static const struct usb_device_id products[] = {
2323	{
2324		/* SMSC7500 USB Gigabit Ethernet Device */
2325		USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2326		.driver_info = (unsigned long) &smsc75xx_info,
2327	},
2328	{
2329		/* SMSC7500 USB Gigabit Ethernet Device */
2330		USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2331		.driver_info = (unsigned long) &smsc75xx_info,
2332	},
2333	{ },		/* END */
2334};
2335MODULE_DEVICE_TABLE(usb, products);
2336
2337static struct usb_driver smsc75xx_driver = {
2338	.name		= SMSC_CHIPNAME,
2339	.id_table	= products,
2340	.probe		= usbnet_probe,
2341	.suspend	= smsc75xx_suspend,
2342	.resume		= smsc75xx_resume,
2343	.reset_resume	= smsc75xx_resume,
2344	.disconnect	= usbnet_disconnect,
2345	.disable_hub_initiated_lpm = 1,
2346	.supports_autosuspend = 1,
2347};
2348
2349module_usb_driver(smsc75xx_driver);
2350
2351MODULE_AUTHOR("Nancy Lin");
2352MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2353MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2354MODULE_LICENSE("GPL");