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
 
 
 
 
 
  64static bool turbo_mode = true;
  65module_param(turbo_mode, bool, 0644);
  66MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  67
  68static int smsc75xx_link_ok_nopm(struct usbnet *dev);
  69static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
  70
  71static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  72					    u32 *data, int in_pm)
  73{
  74	u32 buf;
  75	int ret;
  76	int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  77
  78	BUG_ON(!dev);
  79
  80	if (!in_pm)
  81		fn = usbnet_read_cmd;
  82	else
  83		fn = usbnet_read_cmd_nopm;
  84
  85	ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  86		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  87		 0, index, &buf, 4);
  88	if (unlikely(ret < 4)) {
  89		ret = ret < 0 ? ret : -ENODATA;
  90
  91		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  92			    index, ret);
  93		return ret;
  94	}
  95
  96	le32_to_cpus(&buf);
  97	*data = buf;
  98
  99	return ret;
 100}
 101
 102static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 103					     u32 data, int in_pm)
 104{
 105	u32 buf;
 106	int ret;
 107	int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 108
 109	BUG_ON(!dev);
 110
 111	if (!in_pm)
 112		fn = usbnet_write_cmd;
 113	else
 114		fn = usbnet_write_cmd_nopm;
 115
 116	buf = data;
 117	cpu_to_le32s(&buf);
 118
 119	ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 120		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 121		 0, index, &buf, 4);
 122	if (unlikely(ret < 0))
 123		netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 124			    index, ret);
 125
 126	return ret;
 127}
 128
 129static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 130					       u32 *data)
 131{
 132	return __smsc75xx_read_reg(dev, index, data, 1);
 133}
 134
 135static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 136						u32 data)
 137{
 138	return __smsc75xx_write_reg(dev, index, data, 1);
 139}
 140
 141static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 142					  u32 *data)
 143{
 144	return __smsc75xx_read_reg(dev, index, data, 0);
 145}
 146
 147static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 148					   u32 data)
 149{
 150	return __smsc75xx_write_reg(dev, index, data, 0);
 151}
 152
 153/* Loop until the read is completed with timeout
 154 * called with phy_mutex held */
 155static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 156						     int in_pm)
 157{
 158	unsigned long start_time = jiffies;
 159	u32 val;
 160	int ret;
 161
 162	do {
 163		ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 164		if (ret < 0) {
 165			netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 166			return ret;
 167		}
 168
 169		if (!(val & MII_ACCESS_BUSY))
 170			return 0;
 171	} while (!time_after(jiffies, start_time + HZ));
 172
 173	return -EIO;
 174}
 175
 176static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 177				int in_pm)
 178{
 179	struct usbnet *dev = netdev_priv(netdev);
 180	u32 val, addr;
 181	int ret;
 182
 183	mutex_lock(&dev->phy_mutex);
 184
 185	/* confirm MII not busy */
 186	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 187	if (ret < 0) {
 188		netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 189		goto done;
 190	}
 191
 192	/* set the address, index & direction (read from PHY) */
 193	phy_id &= dev->mii.phy_id_mask;
 194	idx &= dev->mii.reg_num_mask;
 195	addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 196		| ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 197		| MII_ACCESS_READ | MII_ACCESS_BUSY;
 198	ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 199	if (ret < 0) {
 200		netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 201		goto done;
 202	}
 203
 204	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 205	if (ret < 0) {
 206		netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 207		goto done;
 208	}
 209
 210	ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 211	if (ret < 0) {
 212		netdev_warn(dev->net, "Error reading MII_DATA\n");
 213		goto done;
 214	}
 215
 216	ret = (u16)(val & 0xFFFF);
 217
 218done:
 219	mutex_unlock(&dev->phy_mutex);
 220	return ret;
 221}
 222
 223static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 224				  int idx, int regval, int in_pm)
 225{
 226	struct usbnet *dev = netdev_priv(netdev);
 227	u32 val, addr;
 228	int ret;
 229
 230	mutex_lock(&dev->phy_mutex);
 231
 232	/* confirm MII not busy */
 233	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 234	if (ret < 0) {
 235		netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 236		goto done;
 237	}
 238
 239	val = regval;
 240	ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 241	if (ret < 0) {
 242		netdev_warn(dev->net, "Error writing MII_DATA\n");
 243		goto done;
 244	}
 245
 246	/* set the address, index & direction (write to PHY) */
 247	phy_id &= dev->mii.phy_id_mask;
 248	idx &= dev->mii.reg_num_mask;
 249	addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 250		| ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 251		| MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 252	ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 253	if (ret < 0) {
 254		netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 255		goto done;
 256	}
 257
 258	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 259	if (ret < 0) {
 260		netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 261		goto done;
 262	}
 263
 264done:
 265	mutex_unlock(&dev->phy_mutex);
 266}
 267
 268static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 269				   int idx)
 270{
 271	return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 272}
 273
 274static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 275				     int idx, int regval)
 276{
 277	__smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 278}
 279
 280static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 281{
 282	return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 283}
 284
 285static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 286				int regval)
 287{
 288	__smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 289}
 290
 291static int smsc75xx_wait_eeprom(struct usbnet *dev)
 292{
 293	unsigned long start_time = jiffies;
 294	u32 val;
 295	int ret;
 296
 297	do {
 298		ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 299		if (ret < 0) {
 300			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 301			return ret;
 302		}
 303
 304		if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 305			break;
 306		udelay(40);
 307	} while (!time_after(jiffies, start_time + HZ));
 308
 309	if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 310		netdev_warn(dev->net, "EEPROM read operation timeout\n");
 311		return -EIO;
 312	}
 313
 314	return 0;
 315}
 316
 317static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 318{
 319	unsigned long start_time = jiffies;
 320	u32 val;
 321	int ret;
 322
 323	do {
 324		ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 325		if (ret < 0) {
 326			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 327			return ret;
 328		}
 329
 330		if (!(val & E2P_CMD_BUSY))
 331			return 0;
 332
 333		udelay(40);
 334	} while (!time_after(jiffies, start_time + HZ));
 335
 336	netdev_warn(dev->net, "EEPROM is busy\n");
 337	return -EIO;
 338}
 339
 340static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 341				u8 *data)
 342{
 343	u32 val;
 344	int i, ret;
 345
 346	BUG_ON(!dev);
 347	BUG_ON(!data);
 348
 349	ret = smsc75xx_eeprom_confirm_not_busy(dev);
 350	if (ret)
 351		return ret;
 352
 353	for (i = 0; i < length; i++) {
 354		val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 355		ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 356		if (ret < 0) {
 357			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 358			return ret;
 359		}
 360
 361		ret = smsc75xx_wait_eeprom(dev);
 362		if (ret < 0)
 363			return ret;
 364
 365		ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 366		if (ret < 0) {
 367			netdev_warn(dev->net, "Error reading E2P_DATA\n");
 368			return ret;
 369		}
 370
 371		data[i] = val & 0xFF;
 372		offset++;
 373	}
 374
 375	return 0;
 376}
 377
 378static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 379				 u8 *data)
 380{
 381	u32 val;
 382	int i, ret;
 383
 384	BUG_ON(!dev);
 385	BUG_ON(!data);
 386
 387	ret = smsc75xx_eeprom_confirm_not_busy(dev);
 388	if (ret)
 389		return ret;
 390
 391	/* Issue write/erase enable command */
 392	val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 393	ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 394	if (ret < 0) {
 395		netdev_warn(dev->net, "Error writing E2P_CMD\n");
 396		return ret;
 397	}
 398
 399	ret = smsc75xx_wait_eeprom(dev);
 400	if (ret < 0)
 401		return ret;
 402
 403	for (i = 0; i < length; i++) {
 404
 405		/* Fill data register */
 406		val = data[i];
 407		ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 408		if (ret < 0) {
 409			netdev_warn(dev->net, "Error writing E2P_DATA\n");
 410			return ret;
 411		}
 412
 413		/* Send "write" command */
 414		val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 415		ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 416		if (ret < 0) {
 417			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 418			return ret;
 419		}
 420
 421		ret = smsc75xx_wait_eeprom(dev);
 422		if (ret < 0)
 423			return ret;
 424
 425		offset++;
 426	}
 427
 428	return 0;
 429}
 430
 431static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 432{
 433	int i, ret;
 434
 435	for (i = 0; i < 100; i++) {
 436		u32 dp_sel;
 437		ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 438		if (ret < 0) {
 439			netdev_warn(dev->net, "Error reading DP_SEL\n");
 440			return ret;
 441		}
 442
 443		if (dp_sel & DP_SEL_DPRDY)
 444			return 0;
 445
 446		udelay(40);
 447	}
 448
 449	netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 450
 451	return -EIO;
 452}
 453
 454static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 455				   u32 length, u32 *buf)
 456{
 457	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 458	u32 dp_sel;
 459	int i, ret;
 460
 461	mutex_lock(&pdata->dataport_mutex);
 462
 463	ret = smsc75xx_dataport_wait_not_busy(dev);
 464	if (ret < 0) {
 465		netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 466		goto done;
 467	}
 468
 469	ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 470	if (ret < 0) {
 471		netdev_warn(dev->net, "Error reading DP_SEL\n");
 472		goto done;
 473	}
 474
 475	dp_sel &= ~DP_SEL_RSEL;
 476	dp_sel |= ram_select;
 477	ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 478	if (ret < 0) {
 479		netdev_warn(dev->net, "Error writing DP_SEL\n");
 480		goto done;
 481	}
 482
 483	for (i = 0; i < length; i++) {
 484		ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 485		if (ret < 0) {
 486			netdev_warn(dev->net, "Error writing DP_ADDR\n");
 487			goto done;
 488		}
 489
 490		ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 491		if (ret < 0) {
 492			netdev_warn(dev->net, "Error writing DP_DATA\n");
 493			goto done;
 494		}
 495
 496		ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 497		if (ret < 0) {
 498			netdev_warn(dev->net, "Error writing DP_CMD\n");
 499			goto done;
 500		}
 501
 502		ret = smsc75xx_dataport_wait_not_busy(dev);
 503		if (ret < 0) {
 504			netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 505			goto done;
 506		}
 507	}
 508
 509done:
 510	mutex_unlock(&pdata->dataport_mutex);
 511	return ret;
 512}
 513
 514/* returns hash bit number for given MAC address */
 515static u32 smsc75xx_hash(char addr[ETH_ALEN])
 516{
 517	return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 518}
 519
 520static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 521{
 522	struct smsc75xx_priv *pdata =
 523		container_of(param, struct smsc75xx_priv, set_multicast);
 524	struct usbnet *dev = pdata->dev;
 525	int ret;
 526
 527	netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 528		  pdata->rfe_ctl);
 529
 530	smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 531		DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 532
 533	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 534	if (ret < 0)
 535		netdev_warn(dev->net, "Error writing RFE_CRL\n");
 536}
 537
 538static void smsc75xx_set_multicast(struct net_device *netdev)
 539{
 540	struct usbnet *dev = netdev_priv(netdev);
 541	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 542	unsigned long flags;
 543	int i;
 544
 545	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 546
 547	pdata->rfe_ctl &=
 548		~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 549	pdata->rfe_ctl |= RFE_CTL_AB;
 550
 551	for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 552		pdata->multicast_hash_table[i] = 0;
 553
 554	if (dev->net->flags & IFF_PROMISC) {
 555		netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 556		pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 557	} else if (dev->net->flags & IFF_ALLMULTI) {
 558		netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 559		pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 560	} else if (!netdev_mc_empty(dev->net)) {
 561		struct netdev_hw_addr *ha;
 562
 563		netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 564
 565		pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 566
 567		netdev_for_each_mc_addr(ha, netdev) {
 568			u32 bitnum = smsc75xx_hash(ha->addr);
 569			pdata->multicast_hash_table[bitnum / 32] |=
 570				(1 << (bitnum % 32));
 571		}
 572	} else {
 573		netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 574		pdata->rfe_ctl |= RFE_CTL_DPF;
 575	}
 576
 577	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 578
 579	/* defer register writes to a sleepable context */
 580	schedule_work(&pdata->set_multicast);
 581}
 582
 583static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 584					    u16 lcladv, u16 rmtadv)
 585{
 586	u32 flow = 0, fct_flow = 0;
 587	int ret;
 588
 589	if (duplex == DUPLEX_FULL) {
 590		u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 591
 592		if (cap & FLOW_CTRL_TX) {
 593			flow = (FLOW_TX_FCEN | 0xFFFF);
 594			/* set fct_flow thresholds to 20% and 80% */
 595			fct_flow = (8 << 8) | 32;
 596		}
 597
 598		if (cap & FLOW_CTRL_RX)
 599			flow |= FLOW_RX_FCEN;
 600
 601		netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 602			  (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 603			  (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 604	} else {
 605		netif_dbg(dev, link, dev->net, "half duplex\n");
 606	}
 607
 608	ret = smsc75xx_write_reg(dev, FLOW, flow);
 609	if (ret < 0) {
 610		netdev_warn(dev->net, "Error writing FLOW\n");
 611		return ret;
 612	}
 613
 614	ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 615	if (ret < 0) {
 616		netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 617		return ret;
 618	}
 619
 620	return 0;
 621}
 622
 623static int smsc75xx_link_reset(struct usbnet *dev)
 624{
 625	struct mii_if_info *mii = &dev->mii;
 626	struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 627	u16 lcladv, rmtadv;
 628	int ret;
 629
 630	/* write to clear phy interrupt status */
 631	smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 632		PHY_INT_SRC_CLEAR_ALL);
 633
 634	ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 635	if (ret < 0) {
 636		netdev_warn(dev->net, "Error writing INT_STS\n");
 637		return ret;
 638	}
 639
 640	mii_check_media(mii, 1, 1);
 641	mii_ethtool_gset(&dev->mii, &ecmd);
 642	lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 643	rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 644
 645	netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 646		  ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 647
 648	return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 649}
 650
 651static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 652{
 653	u32 intdata;
 654
 655	if (urb->actual_length != 4) {
 656		netdev_warn(dev->net, "unexpected urb length %d\n",
 657			    urb->actual_length);
 658		return;
 659	}
 660
 661	intdata = get_unaligned_le32(urb->transfer_buffer);
 662
 663	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 664
 665	if (intdata & INT_ENP_PHY_INT)
 666		usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 667	else
 668		netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 669			    intdata);
 670}
 671
 672static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 673{
 674	return MAX_EEPROM_SIZE;
 675}
 676
 677static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 678				       struct ethtool_eeprom *ee, u8 *data)
 679{
 680	struct usbnet *dev = netdev_priv(netdev);
 681
 682	ee->magic = LAN75XX_EEPROM_MAGIC;
 683
 684	return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 685}
 686
 687static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 688				       struct ethtool_eeprom *ee, u8 *data)
 689{
 690	struct usbnet *dev = netdev_priv(netdev);
 691
 692	if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 693		netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 694			    ee->magic);
 695		return -EINVAL;
 696	}
 697
 698	return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 699}
 700
 701static void smsc75xx_ethtool_get_wol(struct net_device *net,
 702				     struct ethtool_wolinfo *wolinfo)
 703{
 704	struct usbnet *dev = netdev_priv(net);
 705	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 706
 707	wolinfo->supported = SUPPORTED_WAKE;
 708	wolinfo->wolopts = pdata->wolopts;
 709}
 710
 711static int smsc75xx_ethtool_set_wol(struct net_device *net,
 712				    struct ethtool_wolinfo *wolinfo)
 713{
 714	struct usbnet *dev = netdev_priv(net);
 715	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 716	int ret;
 717
 718	if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 719		return -EINVAL;
 720
 721	pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 722
 723	ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 724	if (ret < 0)
 725		netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 726
 727	return ret;
 728}
 729
 730static const struct ethtool_ops smsc75xx_ethtool_ops = {
 731	.get_link	= usbnet_get_link,
 732	.nway_reset	= usbnet_nway_reset,
 733	.get_drvinfo	= usbnet_get_drvinfo,
 734	.get_msglevel	= usbnet_get_msglevel,
 735	.set_msglevel	= usbnet_set_msglevel,
 736	.get_eeprom_len	= smsc75xx_ethtool_get_eeprom_len,
 737	.get_eeprom	= smsc75xx_ethtool_get_eeprom,
 738	.set_eeprom	= smsc75xx_ethtool_set_eeprom,
 739	.get_wol	= smsc75xx_ethtool_get_wol,
 740	.set_wol	= smsc75xx_ethtool_set_wol,
 741	.get_link_ksettings	= usbnet_get_link_ksettings_mii,
 742	.set_link_ksettings	= usbnet_set_link_ksettings_mii,
 743};
 744
 745static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 746{
 747	struct usbnet *dev = netdev_priv(netdev);
 748
 749	if (!netif_running(netdev))
 750		return -EINVAL;
 751
 752	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 753}
 754
 755static void smsc75xx_init_mac_address(struct usbnet *dev)
 756{
 757	u8 addr[ETH_ALEN];
 758
 759	/* maybe the boot loader passed the MAC address in devicetree */
 760	if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
 761		if (is_valid_ether_addr(dev->net->dev_addr)) {
 762			/* device tree values are valid so use them */
 763			netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
 764			return;
 765		}
 766	}
 767
 768	/* try reading mac address from EEPROM */
 769	if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
 770		eth_hw_addr_set(dev->net, addr);
 771		if (is_valid_ether_addr(dev->net->dev_addr)) {
 772			/* eeprom values are valid so use them */
 773			netif_dbg(dev, ifup, dev->net,
 774				  "MAC address read from EEPROM\n");
 775			return;
 776		}
 777	}
 778
 779	/* no useful static MAC address found. generate a random one */
 780	eth_hw_addr_random(dev->net);
 781	netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 782}
 783
 784static int smsc75xx_set_mac_address(struct usbnet *dev)
 785{
 786	u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 787		dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 788	u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 789
 790	int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 791	if (ret < 0) {
 792		netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 793		return ret;
 794	}
 795
 796	ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 797	if (ret < 0) {
 798		netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 799		return ret;
 800	}
 801
 802	addr_hi |= ADDR_FILTX_FB_VALID;
 803	ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 804	if (ret < 0) {
 805		netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 806		return ret;
 807	}
 808
 809	ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 810	if (ret < 0)
 811		netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 812
 813	return ret;
 814}
 815
 816static int smsc75xx_phy_initialize(struct usbnet *dev)
 817{
 818	int bmcr, ret, timeout = 0;
 819
 820	/* Initialize MII structure */
 821	dev->mii.dev = dev->net;
 822	dev->mii.mdio_read = smsc75xx_mdio_read;
 823	dev->mii.mdio_write = smsc75xx_mdio_write;
 824	dev->mii.phy_id_mask = 0x1f;
 825	dev->mii.reg_num_mask = 0x1f;
 826	dev->mii.supports_gmii = 1;
 827	dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 828
 829	/* reset phy and wait for reset to complete */
 830	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 831
 832	do {
 833		msleep(10);
 834		bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 835		if (bmcr < 0) {
 836			netdev_warn(dev->net, "Error reading MII_BMCR\n");
 837			return bmcr;
 838		}
 839		timeout++;
 840	} while ((bmcr & BMCR_RESET) && (timeout < 100));
 841
 842	if (timeout >= 100) {
 843		netdev_warn(dev->net, "timeout on PHY Reset\n");
 844		return -EIO;
 845	}
 846
 847	/* phy workaround for gig link */
 848	smsc75xx_phy_gig_workaround(dev);
 849
 850	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 851		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 852		ADVERTISE_PAUSE_ASYM);
 853	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 854		ADVERTISE_1000FULL);
 855
 856	/* read and write to clear phy interrupt status */
 857	ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 858	if (ret < 0) {
 859		netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 860		return ret;
 861	}
 862
 863	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 864
 865	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 866		PHY_INT_MASK_DEFAULT);
 867	mii_nway_restart(&dev->mii);
 868
 869	netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 870	return 0;
 871}
 872
 873static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 874{
 875	int ret = 0;
 876	u32 buf;
 877	bool rxenabled;
 878
 879	ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 880	if (ret < 0) {
 881		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 882		return ret;
 883	}
 884
 885	rxenabled = ((buf & MAC_RX_RXEN) != 0);
 886
 887	if (rxenabled) {
 888		buf &= ~MAC_RX_RXEN;
 889		ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 890		if (ret < 0) {
 891			netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 892			return ret;
 893		}
 894	}
 895
 896	/* add 4 to size for FCS */
 897	buf &= ~MAC_RX_MAX_SIZE;
 898	buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 899
 900	ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 901	if (ret < 0) {
 902		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 903		return ret;
 904	}
 905
 906	if (rxenabled) {
 907		buf |= MAC_RX_RXEN;
 908		ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 909		if (ret < 0) {
 910			netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 911			return ret;
 912		}
 913	}
 914
 915	return 0;
 916}
 917
 918static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 919{
 920	struct usbnet *dev = netdev_priv(netdev);
 921	int ret;
 922
 923	ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 924	if (ret < 0) {
 925		netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 926		return ret;
 927	}
 928
 929	return usbnet_change_mtu(netdev, new_mtu);
 930}
 931
 932/* Enable or disable Rx checksum offload engine */
 933static int smsc75xx_set_features(struct net_device *netdev,
 934	netdev_features_t features)
 935{
 936	struct usbnet *dev = netdev_priv(netdev);
 937	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 938	unsigned long flags;
 939	int ret;
 940
 941	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 942
 943	if (features & NETIF_F_RXCSUM)
 944		pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 945	else
 946		pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 947
 948	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 949	/* it's racing here! */
 950
 951	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 952	if (ret < 0) {
 953		netdev_warn(dev->net, "Error writing RFE_CTL\n");
 954		return ret;
 955	}
 956	return 0;
 957}
 958
 959static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 960{
 961	int timeout = 0;
 962
 963	do {
 964		u32 buf;
 965		int ret;
 966
 967		ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 968
 969		if (ret < 0) {
 970			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 971			return ret;
 972		}
 973
 974		if (buf & PMT_CTL_DEV_RDY)
 975			return 0;
 976
 977		msleep(10);
 978		timeout++;
 979	} while (timeout < 100);
 980
 981	netdev_warn(dev->net, "timeout waiting for device ready\n");
 982	return -EIO;
 983}
 984
 985static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
 986{
 987	struct mii_if_info *mii = &dev->mii;
 988	int ret = 0, timeout = 0;
 989	u32 buf, link_up = 0;
 990
 991	/* Set the phy in Gig loopback */
 992	smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
 993
 994	/* Wait for the link up */
 995	do {
 996		link_up = smsc75xx_link_ok_nopm(dev);
 997		usleep_range(10000, 20000);
 998		timeout++;
 999	} while ((!link_up) && (timeout < 1000));
1000
1001	if (timeout >= 1000) {
1002		netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1003		return -EIO;
1004	}
1005
1006	/* phy reset */
1007	ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1008	if (ret < 0) {
1009		netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1010		return ret;
1011	}
1012
1013	buf |= PMT_CTL_PHY_RST;
1014
1015	ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1016	if (ret < 0) {
1017		netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1018		return ret;
1019	}
1020
1021	timeout = 0;
1022	do {
1023		usleep_range(10000, 20000);
1024		ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1025		if (ret < 0) {
1026			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1027				    ret);
1028			return ret;
1029		}
1030		timeout++;
1031	} while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1032
1033	if (timeout >= 100) {
1034		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1035		return -EIO;
1036	}
1037
1038	return 0;
1039}
1040
1041static int smsc75xx_reset(struct usbnet *dev)
1042{
1043	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1044	u32 buf;
1045	int ret = 0, timeout;
1046
1047	netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1048
1049	ret = smsc75xx_wait_ready(dev, 0);
1050	if (ret < 0) {
1051		netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1052		return ret;
1053	}
1054
1055	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1056	if (ret < 0) {
1057		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1058		return ret;
1059	}
1060
1061	buf |= HW_CFG_LRST;
1062
1063	ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1064	if (ret < 0) {
1065		netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1066		return ret;
1067	}
1068
1069	timeout = 0;
1070	do {
1071		msleep(10);
1072		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1073		if (ret < 0) {
1074			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1075			return ret;
1076		}
1077		timeout++;
1078	} while ((buf & HW_CFG_LRST) && (timeout < 100));
1079
1080	if (timeout >= 100) {
1081		netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1082		return -EIO;
1083	}
1084
1085	netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1086
1087	ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1088	if (ret < 0) {
1089		netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1090		return ret;
1091	}
1092
1093	buf |= PMT_CTL_PHY_RST;
1094
1095	ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1096	if (ret < 0) {
1097		netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1098		return ret;
1099	}
1100
1101	timeout = 0;
1102	do {
1103		msleep(10);
1104		ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1105		if (ret < 0) {
1106			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1107			return ret;
1108		}
1109		timeout++;
1110	} while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1111
1112	if (timeout >= 100) {
1113		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1114		return -EIO;
1115	}
1116
1117	netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1118
1119	ret = smsc75xx_set_mac_address(dev);
1120	if (ret < 0) {
1121		netdev_warn(dev->net, "Failed to set mac address\n");
1122		return ret;
1123	}
1124
1125	netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1126		  dev->net->dev_addr);
1127
1128	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1129	if (ret < 0) {
1130		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1131		return ret;
1132	}
1133
1134	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1135		  buf);
1136
1137	buf |= HW_CFG_BIR;
1138
1139	ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1140	if (ret < 0) {
1141		netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1142		return ret;
1143	}
1144
1145	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1146	if (ret < 0) {
1147		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1148		return ret;
1149	}
1150
1151	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1152		  buf);
1153
1154	if (!turbo_mode) {
1155		buf = 0;
1156		dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1157	} else if (dev->udev->speed == USB_SPEED_HIGH) {
1158		buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1159		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1160	} else {
1161		buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1162		dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1163	}
1164
1165	netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1166		  (ulong)dev->rx_urb_size);
1167
1168	ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1169	if (ret < 0) {
1170		netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1171		return ret;
1172	}
1173
1174	ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1175	if (ret < 0) {
1176		netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1177		return ret;
1178	}
1179
1180	netif_dbg(dev, ifup, dev->net,
1181		  "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1182
1183	ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1184	if (ret < 0) {
1185		netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1186		return ret;
1187	}
1188
1189	ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1190	if (ret < 0) {
1191		netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1192		return ret;
1193	}
1194
1195	netif_dbg(dev, ifup, dev->net,
1196		  "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1197
1198	if (turbo_mode) {
1199		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1200		if (ret < 0) {
1201			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1202			return ret;
1203		}
1204
1205		netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1206
1207		buf |= (HW_CFG_MEF | HW_CFG_BCE);
1208
1209		ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1210		if (ret < 0) {
1211			netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1212			return ret;
1213		}
1214
1215		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1216		if (ret < 0) {
1217			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1218			return ret;
1219		}
1220
1221		netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1222	}
1223
1224	/* set FIFO sizes */
1225	buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1226	ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1227	if (ret < 0) {
1228		netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1229		return ret;
1230	}
1231
1232	netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1233
1234	buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1235	ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1236	if (ret < 0) {
1237		netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1238		return ret;
1239	}
1240
1241	netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1242
1243	ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1244	if (ret < 0) {
1245		netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1246		return ret;
1247	}
1248
1249	ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1250	if (ret < 0) {
1251		netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1252		return ret;
1253	}
1254
1255	netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1256
1257	ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1258	if (ret < 0) {
1259		netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1260		return ret;
1261	}
1262
1263	/* only set default GPIO/LED settings if no EEPROM is detected */
1264	if (!(buf & E2P_CMD_LOADED)) {
1265		ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1266		if (ret < 0) {
1267			netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1268			return ret;
1269		}
1270
1271		buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1272		buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1273
1274		ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1275		if (ret < 0) {
1276			netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1277			return ret;
1278		}
1279	}
1280
1281	ret = smsc75xx_write_reg(dev, FLOW, 0);
1282	if (ret < 0) {
1283		netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1284		return ret;
1285	}
1286
1287	ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1288	if (ret < 0) {
1289		netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1290		return ret;
1291	}
1292
1293	/* Don't need rfe_ctl_lock during initialisation */
1294	ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1295	if (ret < 0) {
1296		netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1297		return ret;
1298	}
1299
1300	pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1301
1302	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1303	if (ret < 0) {
1304		netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1305		return ret;
1306	}
1307
1308	ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1309	if (ret < 0) {
1310		netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1311		return ret;
1312	}
1313
1314	netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1315		  pdata->rfe_ctl);
1316
1317	/* Enable or disable checksum offload engines */
1318	smsc75xx_set_features(dev->net, dev->net->features);
1319
1320	smsc75xx_set_multicast(dev->net);
1321
1322	ret = smsc75xx_phy_initialize(dev);
1323	if (ret < 0) {
1324		netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1325		return ret;
1326	}
1327
1328	ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1329	if (ret < 0) {
1330		netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1331		return ret;
1332	}
1333
1334	/* enable PHY interrupts */
1335	buf |= INT_ENP_PHY_INT;
1336
1337	ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1338	if (ret < 0) {
1339		netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1340		return ret;
1341	}
1342
1343	/* allow mac to detect speed and duplex from phy */
1344	ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1345	if (ret < 0) {
1346		netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1347		return ret;
1348	}
1349
1350	buf |= (MAC_CR_ADD | MAC_CR_ASD);
1351	ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1352	if (ret < 0) {
1353		netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1354		return ret;
1355	}
1356
1357	ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1358	if (ret < 0) {
1359		netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1360		return ret;
1361	}
1362
1363	buf |= MAC_TX_TXEN;
1364
1365	ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1366	if (ret < 0) {
1367		netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1368		return ret;
1369	}
1370
1371	netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1372
1373	ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1374	if (ret < 0) {
1375		netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1376		return ret;
1377	}
1378
1379	buf |= FCT_TX_CTL_EN;
1380
1381	ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1382	if (ret < 0) {
1383		netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1384		return ret;
1385	}
1386
1387	netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1388
1389	ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1390	if (ret < 0) {
1391		netdev_warn(dev->net, "Failed to set max rx frame length\n");
1392		return ret;
1393	}
1394
1395	ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1396	if (ret < 0) {
1397		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1398		return ret;
1399	}
1400
1401	buf |= MAC_RX_RXEN;
1402
1403	ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1404	if (ret < 0) {
1405		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1406		return ret;
1407	}
1408
1409	netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1410
1411	ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1412	if (ret < 0) {
1413		netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1414		return ret;
1415	}
1416
1417	buf |= FCT_RX_CTL_EN;
1418
1419	ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1420	if (ret < 0) {
1421		netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1422		return ret;
1423	}
1424
1425	netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1426
1427	netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1428	return 0;
1429}
1430
1431static const struct net_device_ops smsc75xx_netdev_ops = {
1432	.ndo_open		= usbnet_open,
1433	.ndo_stop		= usbnet_stop,
1434	.ndo_start_xmit		= usbnet_start_xmit,
1435	.ndo_tx_timeout		= usbnet_tx_timeout,
1436	.ndo_get_stats64	= dev_get_tstats64,
1437	.ndo_change_mtu		= smsc75xx_change_mtu,
1438	.ndo_set_mac_address 	= eth_mac_addr,
1439	.ndo_validate_addr	= eth_validate_addr,
1440	.ndo_eth_ioctl		= smsc75xx_ioctl,
1441	.ndo_set_rx_mode	= smsc75xx_set_multicast,
1442	.ndo_set_features	= smsc75xx_set_features,
1443};
1444
1445static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1446{
1447	struct smsc75xx_priv *pdata = NULL;
1448	int ret;
1449
1450	printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1451
1452	ret = usbnet_get_endpoints(dev, intf);
1453	if (ret < 0) {
1454		netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1455		return ret;
1456	}
1457
1458	dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1459					      GFP_KERNEL);
1460
1461	pdata = (struct smsc75xx_priv *)(dev->data[0]);
1462	if (!pdata)
1463		return -ENOMEM;
1464
1465	pdata->dev = dev;
1466
1467	spin_lock_init(&pdata->rfe_ctl_lock);
1468	mutex_init(&pdata->dataport_mutex);
1469
1470	INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1471
1472	if (DEFAULT_TX_CSUM_ENABLE)
1473		dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1474
1475	if (DEFAULT_RX_CSUM_ENABLE)
1476		dev->net->features |= NETIF_F_RXCSUM;
1477
1478	dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1479				NETIF_F_RXCSUM;
1480
1481	ret = smsc75xx_wait_ready(dev, 0);
1482	if (ret < 0) {
1483		netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1484		goto free_pdata;
1485	}
1486
1487	smsc75xx_init_mac_address(dev);
1488
1489	/* Init all registers */
1490	ret = smsc75xx_reset(dev);
1491	if (ret < 0) {
1492		netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1493		goto cancel_work;
1494	}
1495
1496	dev->net->netdev_ops = &smsc75xx_netdev_ops;
1497	dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1498	dev->net->flags |= IFF_MULTICAST;
1499	dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1500	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1501	dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1502	return 0;
1503
1504cancel_work:
1505	cancel_work_sync(&pdata->set_multicast);
1506free_pdata:
1507	kfree(pdata);
1508	dev->data[0] = 0;
1509	return ret;
1510}
1511
1512static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1513{
1514	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1515	if (pdata) {
1516		cancel_work_sync(&pdata->set_multicast);
1517		netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1518		kfree(pdata);
 
1519		dev->data[0] = 0;
1520	}
1521}
1522
1523static u16 smsc_crc(const u8 *buffer, size_t len)
1524{
1525	return bitrev16(crc16(0xFFFF, buffer, len));
1526}
1527
1528static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1529			       u32 wuf_mask1)
1530{
1531	int cfg_base = WUF_CFGX + filter * 4;
1532	int mask_base = WUF_MASKX + filter * 16;
1533	int ret;
1534
1535	ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1536	if (ret < 0) {
1537		netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1538		return ret;
1539	}
1540
1541	ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1542	if (ret < 0) {
1543		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1544		return ret;
1545	}
1546
1547	ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1548	if (ret < 0) {
1549		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1550		return ret;
1551	}
1552
1553	ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1554	if (ret < 0) {
1555		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1556		return ret;
1557	}
1558
1559	ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1560	if (ret < 0) {
1561		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1562		return ret;
1563	}
1564
1565	return 0;
1566}
1567
1568static int smsc75xx_enter_suspend0(struct usbnet *dev)
1569{
1570	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1571	u32 val;
1572	int ret;
1573
1574	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1575	if (ret < 0) {
1576		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1577		return ret;
1578	}
1579
1580	val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1581	val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1582
1583	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1584	if (ret < 0) {
1585		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1586		return ret;
1587	}
1588
1589	pdata->suspend_flags |= SUSPEND_SUSPEND0;
1590
1591	return 0;
1592}
1593
1594static int smsc75xx_enter_suspend1(struct usbnet *dev)
1595{
1596	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1597	u32 val;
1598	int ret;
1599
1600	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1601	if (ret < 0) {
1602		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1603		return ret;
1604	}
1605
1606	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1607	val |= PMT_CTL_SUS_MODE_1;
1608
1609	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1610	if (ret < 0) {
1611		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1612		return ret;
1613	}
1614
1615	/* clear wol status, enable energy detection */
1616	val &= ~PMT_CTL_WUPS;
1617	val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1618
1619	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1620	if (ret < 0) {
1621		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1622		return ret;
1623	}
1624
1625	pdata->suspend_flags |= SUSPEND_SUSPEND1;
1626
1627	return 0;
1628}
1629
1630static int smsc75xx_enter_suspend2(struct usbnet *dev)
1631{
1632	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1633	u32 val;
1634	int ret;
1635
1636	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1637	if (ret < 0) {
1638		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1639		return ret;
1640	}
1641
1642	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1643	val |= PMT_CTL_SUS_MODE_2;
1644
1645	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1646	if (ret < 0) {
1647		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1648		return ret;
1649	}
1650
1651	pdata->suspend_flags |= SUSPEND_SUSPEND2;
1652
1653	return 0;
1654}
1655
1656static int smsc75xx_enter_suspend3(struct usbnet *dev)
1657{
1658	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1659	u32 val;
1660	int ret;
1661
1662	ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1663	if (ret < 0) {
1664		netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1665		return ret;
1666	}
1667
1668	if (val & FCT_RX_CTL_RXUSED) {
1669		netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1670		return -EBUSY;
1671	}
1672
1673	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1674	if (ret < 0) {
1675		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1676		return ret;
1677	}
1678
1679	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1680	val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1681
1682	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1683	if (ret < 0) {
1684		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1685		return ret;
1686	}
1687
1688	/* clear wol status */
1689	val &= ~PMT_CTL_WUPS;
1690	val |= PMT_CTL_WUPS_WOL;
1691
1692	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1693	if (ret < 0) {
1694		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1695		return ret;
1696	}
1697
1698	pdata->suspend_flags |= SUSPEND_SUSPEND3;
1699
1700	return 0;
1701}
1702
1703static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1704{
1705	struct mii_if_info *mii = &dev->mii;
1706	int ret;
1707
1708	netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1709
1710	/* read to clear */
1711	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1712	if (ret < 0) {
1713		netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1714		return ret;
1715	}
1716
1717	/* enable interrupt source */
1718	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1719	if (ret < 0) {
1720		netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1721		return ret;
1722	}
1723
1724	ret |= mask;
1725
1726	smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1727
1728	return 0;
1729}
1730
1731static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1732{
1733	struct mii_if_info *mii = &dev->mii;
1734	int ret;
1735
1736	/* first, a dummy read, needed to latch some MII phys */
1737	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1738	if (ret < 0) {
1739		netdev_warn(dev->net, "Error reading MII_BMSR\n");
1740		return ret;
1741	}
1742
1743	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1744	if (ret < 0) {
1745		netdev_warn(dev->net, "Error reading MII_BMSR\n");
1746		return ret;
1747	}
1748
1749	return !!(ret & BMSR_LSTATUS);
1750}
1751
1752static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1753{
1754	int ret;
1755
1756	if (!netif_running(dev->net)) {
1757		/* interface is ifconfig down so fully power down hw */
1758		netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1759		return smsc75xx_enter_suspend2(dev);
1760	}
1761
1762	if (!link_up) {
1763		/* link is down so enter EDPD mode */
1764		netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1765
1766		/* enable PHY wakeup events for if cable is attached */
1767		ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1768			PHY_INT_MASK_ANEG_COMP);
1769		if (ret < 0) {
1770			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1771			return ret;
1772		}
1773
1774		netdev_info(dev->net, "entering SUSPEND1 mode\n");
1775		return smsc75xx_enter_suspend1(dev);
1776	}
1777
1778	/* enable PHY wakeup events so we remote wakeup if cable is pulled */
1779	ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1780		PHY_INT_MASK_LINK_DOWN);
1781	if (ret < 0) {
1782		netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1783		return ret;
1784	}
1785
1786	netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1787	return smsc75xx_enter_suspend3(dev);
1788}
1789
1790static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1791{
1792	struct usbnet *dev = usb_get_intfdata(intf);
1793	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1794	u32 val, link_up;
1795	int ret;
1796
1797	ret = usbnet_suspend(intf, message);
1798	if (ret < 0) {
1799		netdev_warn(dev->net, "usbnet_suspend error\n");
1800		return ret;
1801	}
1802
1803	if (pdata->suspend_flags) {
1804		netdev_warn(dev->net, "error during last resume\n");
1805		pdata->suspend_flags = 0;
1806	}
1807
1808	/* determine if link is up using only _nopm functions */
1809	link_up = smsc75xx_link_ok_nopm(dev);
1810
1811	if (message.event == PM_EVENT_AUTO_SUSPEND) {
1812		ret = smsc75xx_autosuspend(dev, link_up);
1813		goto done;
1814	}
1815
1816	/* if we get this far we're not autosuspending */
1817	/* if no wol options set, or if link is down and we're not waking on
1818	 * PHY activity, enter lowest power SUSPEND2 mode
1819	 */
1820	if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1821		!(link_up || (pdata->wolopts & WAKE_PHY))) {
1822		netdev_info(dev->net, "entering SUSPEND2 mode\n");
1823
1824		/* disable energy detect (link up) & wake up events */
1825		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1826		if (ret < 0) {
1827			netdev_warn(dev->net, "Error reading WUCSR\n");
1828			goto done;
1829		}
1830
1831		val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1832
1833		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1834		if (ret < 0) {
1835			netdev_warn(dev->net, "Error writing WUCSR\n");
1836			goto done;
1837		}
1838
1839		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1840		if (ret < 0) {
1841			netdev_warn(dev->net, "Error reading PMT_CTL\n");
1842			goto done;
1843		}
1844
1845		val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1846
1847		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1848		if (ret < 0) {
1849			netdev_warn(dev->net, "Error writing PMT_CTL\n");
1850			goto done;
1851		}
1852
1853		ret = smsc75xx_enter_suspend2(dev);
1854		goto done;
1855	}
1856
1857	if (pdata->wolopts & WAKE_PHY) {
1858		ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1859			(PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1860		if (ret < 0) {
1861			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1862			goto done;
1863		}
1864
1865		/* if link is down then configure EDPD and enter SUSPEND1,
1866		 * otherwise enter SUSPEND0 below
1867		 */
1868		if (!link_up) {
1869			struct mii_if_info *mii = &dev->mii;
1870			netdev_info(dev->net, "entering SUSPEND1 mode\n");
1871
1872			/* enable energy detect power-down mode */
1873			ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1874				PHY_MODE_CTRL_STS);
1875			if (ret < 0) {
1876				netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1877				goto done;
1878			}
1879
1880			ret |= MODE_CTRL_STS_EDPWRDOWN;
1881
1882			smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1883				PHY_MODE_CTRL_STS, ret);
1884
1885			/* enter SUSPEND1 mode */
1886			ret = smsc75xx_enter_suspend1(dev);
1887			goto done;
1888		}
1889	}
1890
1891	if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1892		int i, filter = 0;
1893
1894		/* disable all filters */
1895		for (i = 0; i < WUF_NUM; i++) {
1896			ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1897			if (ret < 0) {
1898				netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1899				goto done;
1900			}
1901		}
1902
1903		if (pdata->wolopts & WAKE_MCAST) {
1904			const u8 mcast[] = {0x01, 0x00, 0x5E};
1905			netdev_info(dev->net, "enabling multicast detection\n");
1906
1907			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1908				| smsc_crc(mcast, 3);
1909			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1910			if (ret < 0) {
1911				netdev_warn(dev->net, "Error writing wakeup filter\n");
1912				goto done;
1913			}
1914		}
1915
1916		if (pdata->wolopts & WAKE_ARP) {
1917			const u8 arp[] = {0x08, 0x06};
1918			netdev_info(dev->net, "enabling ARP detection\n");
1919
1920			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1921				| smsc_crc(arp, 2);
1922			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1923			if (ret < 0) {
1924				netdev_warn(dev->net, "Error writing wakeup filter\n");
1925				goto done;
1926			}
1927		}
1928
1929		/* clear any pending pattern match packet status */
1930		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1931		if (ret < 0) {
1932			netdev_warn(dev->net, "Error reading WUCSR\n");
1933			goto done;
1934		}
1935
1936		val |= WUCSR_WUFR;
1937
1938		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1939		if (ret < 0) {
1940			netdev_warn(dev->net, "Error writing WUCSR\n");
1941			goto done;
1942		}
1943
1944		netdev_info(dev->net, "enabling packet match detection\n");
1945		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1946		if (ret < 0) {
1947			netdev_warn(dev->net, "Error reading WUCSR\n");
1948			goto done;
1949		}
1950
1951		val |= WUCSR_WUEN;
1952
1953		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1954		if (ret < 0) {
1955			netdev_warn(dev->net, "Error writing WUCSR\n");
1956			goto done;
1957		}
1958	} else {
1959		netdev_info(dev->net, "disabling packet match detection\n");
1960		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1961		if (ret < 0) {
1962			netdev_warn(dev->net, "Error reading WUCSR\n");
1963			goto done;
1964		}
1965
1966		val &= ~WUCSR_WUEN;
1967
1968		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1969		if (ret < 0) {
1970			netdev_warn(dev->net, "Error writing WUCSR\n");
1971			goto done;
1972		}
1973	}
1974
1975	/* disable magic, bcast & unicast wakeup sources */
1976	ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1977	if (ret < 0) {
1978		netdev_warn(dev->net, "Error reading WUCSR\n");
1979		goto done;
1980	}
1981
1982	val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1983
1984	ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1985	if (ret < 0) {
1986		netdev_warn(dev->net, "Error writing WUCSR\n");
1987		goto done;
1988	}
1989
1990	if (pdata->wolopts & WAKE_PHY) {
1991		netdev_info(dev->net, "enabling PHY wakeup\n");
1992
1993		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1994		if (ret < 0) {
1995			netdev_warn(dev->net, "Error reading PMT_CTL\n");
1996			goto done;
1997		}
1998
1999		/* clear wol status, enable energy detection */
2000		val &= ~PMT_CTL_WUPS;
2001		val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2002
2003		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2004		if (ret < 0) {
2005			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2006			goto done;
2007		}
2008	}
2009
2010	if (pdata->wolopts & WAKE_MAGIC) {
2011		netdev_info(dev->net, "enabling magic packet wakeup\n");
2012		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2013		if (ret < 0) {
2014			netdev_warn(dev->net, "Error reading WUCSR\n");
2015			goto done;
2016		}
2017
2018		/* clear any pending magic packet status */
2019		val |= WUCSR_MPR | WUCSR_MPEN;
2020
2021		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2022		if (ret < 0) {
2023			netdev_warn(dev->net, "Error writing WUCSR\n");
2024			goto done;
2025		}
2026	}
2027
2028	if (pdata->wolopts & WAKE_BCAST) {
2029		netdev_info(dev->net, "enabling broadcast detection\n");
2030		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2031		if (ret < 0) {
2032			netdev_warn(dev->net, "Error reading WUCSR\n");
2033			goto done;
2034		}
2035
2036		val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2037
2038		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2039		if (ret < 0) {
2040			netdev_warn(dev->net, "Error writing WUCSR\n");
2041			goto done;
2042		}
2043	}
2044
2045	if (pdata->wolopts & WAKE_UCAST) {
2046		netdev_info(dev->net, "enabling unicast detection\n");
2047		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2048		if (ret < 0) {
2049			netdev_warn(dev->net, "Error reading WUCSR\n");
2050			goto done;
2051		}
2052
2053		val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2054
2055		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2056		if (ret < 0) {
2057			netdev_warn(dev->net, "Error writing WUCSR\n");
2058			goto done;
2059		}
2060	}
2061
2062	/* enable receiver to enable frame reception */
2063	ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2064	if (ret < 0) {
2065		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2066		goto done;
2067	}
2068
2069	val |= MAC_RX_RXEN;
2070
2071	ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2072	if (ret < 0) {
2073		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2074		goto done;
2075	}
2076
2077	/* some wol options are enabled, so enter SUSPEND0 */
2078	netdev_info(dev->net, "entering SUSPEND0 mode\n");
2079	ret = smsc75xx_enter_suspend0(dev);
2080
2081done:
2082	/*
2083	 * TODO: resume() might need to handle the suspend failure
2084	 * in system sleep
2085	 */
2086	if (ret && PMSG_IS_AUTO(message))
2087		usbnet_resume(intf);
2088	return ret;
2089}
2090
2091static int smsc75xx_resume(struct usb_interface *intf)
2092{
2093	struct usbnet *dev = usb_get_intfdata(intf);
2094	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2095	u8 suspend_flags = pdata->suspend_flags;
2096	int ret;
2097	u32 val;
2098
2099	netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2100
2101	/* do this first to ensure it's cleared even in error case */
2102	pdata->suspend_flags = 0;
2103
2104	if (suspend_flags & SUSPEND_ALLMODES) {
2105		/* Disable wakeup sources */
2106		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2107		if (ret < 0) {
2108			netdev_warn(dev->net, "Error reading WUCSR\n");
2109			return ret;
2110		}
2111
2112		val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2113			| WUCSR_BCST_EN);
2114
2115		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2116		if (ret < 0) {
2117			netdev_warn(dev->net, "Error writing WUCSR\n");
2118			return ret;
2119		}
2120
2121		/* clear wake-up status */
2122		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2123		if (ret < 0) {
2124			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2125			return ret;
2126		}
2127
2128		val &= ~PMT_CTL_WOL_EN;
2129		val |= PMT_CTL_WUPS;
2130
2131		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2132		if (ret < 0) {
2133			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2134			return ret;
2135		}
2136	}
2137
2138	if (suspend_flags & SUSPEND_SUSPEND2) {
2139		netdev_info(dev->net, "resuming from SUSPEND2\n");
2140
2141		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2142		if (ret < 0) {
2143			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2144			return ret;
2145		}
2146
2147		val |= PMT_CTL_PHY_PWRUP;
2148
2149		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2150		if (ret < 0) {
2151			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2152			return ret;
2153		}
2154	}
2155
2156	ret = smsc75xx_wait_ready(dev, 1);
2157	if (ret < 0) {
2158		netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2159		return ret;
2160	}
2161
2162	return usbnet_resume(intf);
2163}
2164
2165static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2166				     u32 rx_cmd_a, u32 rx_cmd_b)
2167{
2168	if (!(dev->net->features & NETIF_F_RXCSUM) ||
2169	    unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2170		skb->ip_summed = CHECKSUM_NONE;
2171	} else {
2172		skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2173		skb->ip_summed = CHECKSUM_COMPLETE;
2174	}
2175}
2176
2177static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2178{
2179	/* This check is no longer done by usbnet */
2180	if (skb->len < dev->net->hard_header_len)
2181		return 0;
2182
2183	while (skb->len > 0) {
2184		u32 rx_cmd_a, rx_cmd_b, align_count, size;
2185		struct sk_buff *ax_skb;
2186		unsigned char *packet;
2187
2188		rx_cmd_a = get_unaligned_le32(skb->data);
2189		skb_pull(skb, 4);
2190
2191		rx_cmd_b = get_unaligned_le32(skb->data);
2192		skb_pull(skb, 4 + RXW_PADDING);
2193
2194		packet = skb->data;
2195
2196		/* get the packet length */
2197		size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2198		align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2199
2200		if (unlikely(size > skb->len)) {
2201			netif_dbg(dev, rx_err, dev->net,
2202				  "size err rx_cmd_a=0x%08x\n",
2203				  rx_cmd_a);
2204			return 0;
2205		}
2206
2207		if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2208			netif_dbg(dev, rx_err, dev->net,
2209				  "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2210			dev->net->stats.rx_errors++;
2211			dev->net->stats.rx_dropped++;
2212
2213			if (rx_cmd_a & RX_CMD_A_FCS)
2214				dev->net->stats.rx_crc_errors++;
2215			else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2216				dev->net->stats.rx_frame_errors++;
2217		} else {
2218			/* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2219			if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2220				netif_dbg(dev, rx_err, dev->net,
2221					  "size err rx_cmd_a=0x%08x\n",
2222					  rx_cmd_a);
2223				return 0;
2224			}
2225
2226			/* last frame in this batch */
2227			if (skb->len == size) {
2228				smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2229					rx_cmd_b);
2230
2231				skb_trim(skb, skb->len - 4); /* remove fcs */
 
2232
2233				return 1;
2234			}
2235
2236			/* Use "size - 4" to remove fcs */
2237			ax_skb = netdev_alloc_skb_ip_align(dev->net, size - 4);
2238			if (unlikely(!ax_skb)) {
2239				netdev_warn(dev->net, "Error allocating skb\n");
2240				return 0;
2241			}
2242
2243			skb_put(ax_skb, size - 4);
2244			memcpy(ax_skb->data, packet, size - 4);
 
2245
2246			smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2247				rx_cmd_b);
 
 
 
2248
2249			usbnet_skb_return(dev, ax_skb);
2250		}
2251
2252		skb_pull(skb, size);
2253
2254		/* padding bytes before the next frame starts */
2255		if (skb->len)
2256			skb_pull(skb, align_count);
2257	}
2258
2259	return 1;
2260}
2261
2262static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2263					 struct sk_buff *skb, gfp_t flags)
2264{
2265	u32 tx_cmd_a, tx_cmd_b;
2266	void *ptr;
2267
2268	if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2269		dev_kfree_skb_any(skb);
2270		return NULL;
2271	}
2272
2273	tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2274
2275	if (skb->ip_summed == CHECKSUM_PARTIAL)
2276		tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2277
2278	if (skb_is_gso(skb)) {
2279		u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2280		tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2281
2282		tx_cmd_a |= TX_CMD_A_LSO;
2283	} else {
2284		tx_cmd_b = 0;
2285	}
2286
2287	ptr = skb_push(skb, 8);
2288	put_unaligned_le32(tx_cmd_a, ptr);
2289	put_unaligned_le32(tx_cmd_b, ptr + 4);
2290
2291	return skb;
2292}
2293
2294static int smsc75xx_manage_power(struct usbnet *dev, int on)
2295{
2296	dev->intf->needs_remote_wakeup = on;
2297	return 0;
2298}
2299
2300static const struct driver_info smsc75xx_info = {
2301	.description	= "smsc75xx USB 2.0 Gigabit Ethernet",
2302	.bind		= smsc75xx_bind,
2303	.unbind		= smsc75xx_unbind,
2304	.link_reset	= smsc75xx_link_reset,
2305	.reset		= smsc75xx_reset,
2306	.rx_fixup	= smsc75xx_rx_fixup,
2307	.tx_fixup	= smsc75xx_tx_fixup,
2308	.status		= smsc75xx_status,
2309	.manage_power	= smsc75xx_manage_power,
2310	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2311};
2312
2313static const struct usb_device_id products[] = {
2314	{
2315		/* SMSC7500 USB Gigabit Ethernet Device */
2316		USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2317		.driver_info = (unsigned long) &smsc75xx_info,
2318	},
2319	{
2320		/* SMSC7500 USB Gigabit Ethernet Device */
2321		USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2322		.driver_info = (unsigned long) &smsc75xx_info,
2323	},
2324	{ },		/* END */
2325};
2326MODULE_DEVICE_TABLE(usb, products);
2327
2328static struct usb_driver smsc75xx_driver = {
2329	.name		= SMSC_CHIPNAME,
2330	.id_table	= products,
2331	.probe		= usbnet_probe,
2332	.suspend	= smsc75xx_suspend,
2333	.resume		= smsc75xx_resume,
2334	.reset_resume	= smsc75xx_resume,
2335	.disconnect	= usbnet_disconnect,
2336	.disable_hub_initiated_lpm = 1,
2337	.supports_autosuspend = 1,
2338};
2339
2340module_usb_driver(smsc75xx_driver);
2341
2342MODULE_AUTHOR("Nancy Lin");
2343MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2344MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2345MODULE_LICENSE("GPL");