1 /***************************************************************************
   2 *
   3 * Copyright (C) 2007-2010 SMSC
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License
   7 * as published by the Free Software Foundation; either version 2
   8 * of the License, or (at your option) any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17 *
  18 *****************************************************************************/
  19
  20#include <linux/module.h>
  21#include <linux/kmod.h>
  22#include <linux/netdevice.h>
  23#include <linux/etherdevice.h>
  24#include <linux/ethtool.h>
  25#include <linux/mii.h>
  26#include <linux/usb.h>
  27#include <linux/bitrev.h>
  28#include <linux/crc16.h>
  29#include <linux/crc32.h>
  30#include <linux/usb/usbnet.h>
  31#include <linux/slab.h>
 
  32#include "smsc75xx.h"
  33
  34#define SMSC_CHIPNAME			"smsc75xx"
  35#define SMSC_DRIVER_VERSION		"1.0.0"
  36#define HS_USB_PKT_SIZE			(512)
  37#define FS_USB_PKT_SIZE			(64)
  38#define DEFAULT_HS_BURST_CAP_SIZE	(16 * 1024 + 5 * HS_USB_PKT_SIZE)
  39#define DEFAULT_FS_BURST_CAP_SIZE	(6 * 1024 + 33 * FS_USB_PKT_SIZE)
  40#define DEFAULT_BULK_IN_DELAY		(0x00002000)
  41#define MAX_SINGLE_PACKET_SIZE		(9000)
  42#define LAN75XX_EEPROM_MAGIC		(0x7500)
  43#define EEPROM_MAC_OFFSET		(0x01)
  44#define DEFAULT_TX_CSUM_ENABLE		(true)
  45#define DEFAULT_RX_CSUM_ENABLE		(true)
  46#define SMSC75XX_INTERNAL_PHY_ID	(1)
  47#define SMSC75XX_TX_OVERHEAD		(8)
  48#define MAX_RX_FIFO_SIZE		(20 * 1024)
  49#define MAX_TX_FIFO_SIZE		(12 * 1024)
  50#define USB_VENDOR_ID_SMSC		(0x0424)
  51#define USB_PRODUCT_ID_LAN7500		(0x7500)
  52#define USB_PRODUCT_ID_LAN7505		(0x7505)
  53#define RXW_PADDING			2
  54#define SUPPORTED_WAKE			(WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  55					 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  56
  57#define SUSPEND_SUSPEND0		(0x01)
  58#define SUSPEND_SUSPEND1		(0x02)
  59#define SUSPEND_SUSPEND2		(0x04)
  60#define SUSPEND_SUSPEND3		(0x08)
  61#define SUSPEND_ALLMODES		(SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  62					 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  63
  64struct smsc75xx_priv {
  65	struct usbnet *dev;
  66	u32 rfe_ctl;
  67	u32 wolopts;
  68	u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  69	struct mutex dataport_mutex;
  70	spinlock_t rfe_ctl_lock;
  71	struct work_struct set_multicast;
  72	u8 suspend_flags;
  73};
  74
  75struct usb_context {
  76	struct usb_ctrlrequest req;
  77	struct usbnet *dev;
  78};
  79
  80static bool turbo_mode = true;
  81module_param(turbo_mode, bool, 0644);
  82MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  83
  84static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  85					    u32 *data, int in_pm)
  86{
  87	u32 buf;
  88	int ret;
  89	int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  90
  91	BUG_ON(!dev);
  92
  93	if (!in_pm)
  94		fn = usbnet_read_cmd;
  95	else
  96		fn = usbnet_read_cmd_nopm;
  97
  98	ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  99		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 100		 0, index, &buf, 4);
 101	if (unlikely(ret < 0))
 102		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 103			    index, ret);
 104
 105	le32_to_cpus(&buf);
 106	*data = buf;
 107
 108	return ret;
 109}
 110
 111static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 112					     u32 data, int in_pm)
 113{
 114	u32 buf;
 115	int ret;
 116	int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 117
 118	BUG_ON(!dev);
 119
 120	if (!in_pm)
 121		fn = usbnet_write_cmd;
 122	else
 123		fn = usbnet_write_cmd_nopm;
 124
 125	buf = data;
 126	cpu_to_le32s(&buf);
 127
 128	ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 129		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 130		 0, index, &buf, 4);
 131	if (unlikely(ret < 0))
 132		netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 133			    index, ret);
 134
 135	return ret;
 136}
 137
 138static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 139					       u32 *data)
 140{
 141	return __smsc75xx_read_reg(dev, index, data, 1);
 142}
 143
 144static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 145						u32 data)
 146{
 147	return __smsc75xx_write_reg(dev, index, data, 1);
 148}
 149
 150static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 151					  u32 *data)
 152{
 153	return __smsc75xx_read_reg(dev, index, data, 0);
 154}
 155
 156static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 157					   u32 data)
 158{
 159	return __smsc75xx_write_reg(dev, index, data, 0);
 160}
 161
 162/* Loop until the read is completed with timeout
 163 * called with phy_mutex held */
 164static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 165						     int in_pm)
 166{
 167	unsigned long start_time = jiffies;
 168	u32 val;
 169	int ret;
 170
 171	do {
 172		ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 173		if (ret < 0) {
 174			netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 175			return ret;
 176		}
 177
 178		if (!(val & MII_ACCESS_BUSY))
 179			return 0;
 180	} while (!time_after(jiffies, start_time + HZ));
 181
 182	return -EIO;
 183}
 184
 185static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 186				int in_pm)
 187{
 188	struct usbnet *dev = netdev_priv(netdev);
 189	u32 val, addr;
 190	int ret;
 191
 192	mutex_lock(&dev->phy_mutex);
 193
 194	/* confirm MII not busy */
 195	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 196	if (ret < 0) {
 197		netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 198		goto done;
 199	}
 200
 201	/* set the address, index & direction (read from PHY) */
 202	phy_id &= dev->mii.phy_id_mask;
 203	idx &= dev->mii.reg_num_mask;
 204	addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 205		| ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 206		| MII_ACCESS_READ | MII_ACCESS_BUSY;
 207	ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 208	if (ret < 0) {
 209		netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 210		goto done;
 211	}
 212
 213	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 214	if (ret < 0) {
 215		netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 216		goto done;
 217	}
 218
 219	ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 220	if (ret < 0) {
 221		netdev_warn(dev->net, "Error reading MII_DATA\n");
 222		goto done;
 223	}
 224
 225	ret = (u16)(val & 0xFFFF);
 226
 227done:
 228	mutex_unlock(&dev->phy_mutex);
 229	return ret;
 230}
 231
 232static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 233				  int idx, int regval, int in_pm)
 234{
 235	struct usbnet *dev = netdev_priv(netdev);
 236	u32 val, addr;
 237	int ret;
 238
 239	mutex_lock(&dev->phy_mutex);
 240
 241	/* confirm MII not busy */
 242	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 243	if (ret < 0) {
 244		netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 245		goto done;
 246	}
 247
 248	val = regval;
 249	ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 250	if (ret < 0) {
 251		netdev_warn(dev->net, "Error writing MII_DATA\n");
 252		goto done;
 253	}
 254
 255	/* set the address, index & direction (write to PHY) */
 256	phy_id &= dev->mii.phy_id_mask;
 257	idx &= dev->mii.reg_num_mask;
 258	addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 259		| ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 260		| MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 261	ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 262	if (ret < 0) {
 263		netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 264		goto done;
 265	}
 266
 267	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 268	if (ret < 0) {
 269		netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 270		goto done;
 271	}
 272
 273done:
 274	mutex_unlock(&dev->phy_mutex);
 275}
 276
 277static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 278				   int idx)
 279{
 280	return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 281}
 282
 283static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 284				     int idx, int regval)
 285{
 286	__smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 287}
 288
 289static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 290{
 291	return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 292}
 293
 294static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 295				int regval)
 296{
 297	__smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 298}
 299
 300static int smsc75xx_wait_eeprom(struct usbnet *dev)
 301{
 302	unsigned long start_time = jiffies;
 303	u32 val;
 304	int ret;
 305
 306	do {
 307		ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 308		if (ret < 0) {
 309			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 310			return ret;
 311		}
 312
 313		if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 314			break;
 315		udelay(40);
 316	} while (!time_after(jiffies, start_time + HZ));
 317
 318	if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 319		netdev_warn(dev->net, "EEPROM read operation timeout\n");
 320		return -EIO;
 321	}
 322
 323	return 0;
 324}
 325
 326static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 327{
 328	unsigned long start_time = jiffies;
 329	u32 val;
 330	int ret;
 331
 332	do {
 333		ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 334		if (ret < 0) {
 335			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 336			return ret;
 337		}
 338
 339		if (!(val & E2P_CMD_BUSY))
 340			return 0;
 341
 342		udelay(40);
 343	} while (!time_after(jiffies, start_time + HZ));
 344
 345	netdev_warn(dev->net, "EEPROM is busy\n");
 346	return -EIO;
 347}
 348
 349static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 350				u8 *data)
 351{
 352	u32 val;
 353	int i, ret;
 354
 355	BUG_ON(!dev);
 356	BUG_ON(!data);
 357
 358	ret = smsc75xx_eeprom_confirm_not_busy(dev);
 359	if (ret)
 360		return ret;
 361
 362	for (i = 0; i < length; i++) {
 363		val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 364		ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 365		if (ret < 0) {
 366			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 367			return ret;
 368		}
 369
 370		ret = smsc75xx_wait_eeprom(dev);
 371		if (ret < 0)
 372			return ret;
 373
 374		ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 375		if (ret < 0) {
 376			netdev_warn(dev->net, "Error reading E2P_DATA\n");
 377			return ret;
 378		}
 379
 380		data[i] = val & 0xFF;
 381		offset++;
 382	}
 383
 384	return 0;
 385}
 386
 387static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 388				 u8 *data)
 389{
 390	u32 val;
 391	int i, ret;
 392
 393	BUG_ON(!dev);
 394	BUG_ON(!data);
 395
 396	ret = smsc75xx_eeprom_confirm_not_busy(dev);
 397	if (ret)
 398		return ret;
 399
 400	/* Issue write/erase enable command */
 401	val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 402	ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 403	if (ret < 0) {
 404		netdev_warn(dev->net, "Error writing E2P_CMD\n");
 405		return ret;
 406	}
 407
 408	ret = smsc75xx_wait_eeprom(dev);
 409	if (ret < 0)
 410		return ret;
 411
 412	for (i = 0; i < length; i++) {
 413
 414		/* Fill data register */
 415		val = data[i];
 416		ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 417		if (ret < 0) {
 418			netdev_warn(dev->net, "Error writing E2P_DATA\n");
 419			return ret;
 420		}
 421
 422		/* Send "write" command */
 423		val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 424		ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 425		if (ret < 0) {
 426			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 427			return ret;
 428		}
 429
 430		ret = smsc75xx_wait_eeprom(dev);
 431		if (ret < 0)
 432			return ret;
 433
 434		offset++;
 435	}
 436
 437	return 0;
 438}
 439
 440static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 441{
 442	int i, ret;
 443
 444	for (i = 0; i < 100; i++) {
 445		u32 dp_sel;
 446		ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 447		if (ret < 0) {
 448			netdev_warn(dev->net, "Error reading DP_SEL\n");
 449			return ret;
 450		}
 451
 452		if (dp_sel & DP_SEL_DPRDY)
 453			return 0;
 454
 455		udelay(40);
 456	}
 457
 458	netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 459
 460	return -EIO;
 461}
 462
 463static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 464				   u32 length, u32 *buf)
 465{
 466	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 467	u32 dp_sel;
 468	int i, ret;
 469
 470	mutex_lock(&pdata->dataport_mutex);
 471
 472	ret = smsc75xx_dataport_wait_not_busy(dev);
 473	if (ret < 0) {
 474		netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 475		goto done;
 476	}
 477
 478	ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 479	if (ret < 0) {
 480		netdev_warn(dev->net, "Error reading DP_SEL\n");
 481		goto done;
 482	}
 483
 484	dp_sel &= ~DP_SEL_RSEL;
 485	dp_sel |= ram_select;
 486	ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 487	if (ret < 0) {
 488		netdev_warn(dev->net, "Error writing DP_SEL\n");
 489		goto done;
 490	}
 491
 492	for (i = 0; i < length; i++) {
 493		ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 494		if (ret < 0) {
 495			netdev_warn(dev->net, "Error writing DP_ADDR\n");
 496			goto done;
 497		}
 498
 499		ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 500		if (ret < 0) {
 501			netdev_warn(dev->net, "Error writing DP_DATA\n");
 502			goto done;
 503		}
 504
 505		ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 506		if (ret < 0) {
 507			netdev_warn(dev->net, "Error writing DP_CMD\n");
 508			goto done;
 509		}
 510
 511		ret = smsc75xx_dataport_wait_not_busy(dev);
 512		if (ret < 0) {
 513			netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 514			goto done;
 515		}
 516	}
 517
 518done:
 519	mutex_unlock(&pdata->dataport_mutex);
 520	return ret;
 521}
 522
 523/* returns hash bit number for given MAC address */
 524static u32 smsc75xx_hash(char addr[ETH_ALEN])
 525{
 526	return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 527}
 528
 529static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 530{
 531	struct smsc75xx_priv *pdata =
 532		container_of(param, struct smsc75xx_priv, set_multicast);
 533	struct usbnet *dev = pdata->dev;
 534	int ret;
 535
 536	netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 537		  pdata->rfe_ctl);
 538
 539	smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 540		DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 541
 542	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 543	if (ret < 0)
 544		netdev_warn(dev->net, "Error writing RFE_CRL\n");
 545}
 546
 547static void smsc75xx_set_multicast(struct net_device *netdev)
 548{
 549	struct usbnet *dev = netdev_priv(netdev);
 550	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 551	unsigned long flags;
 552	int i;
 553
 554	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 555
 556	pdata->rfe_ctl &=
 557		~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 558	pdata->rfe_ctl |= RFE_CTL_AB;
 559
 560	for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 561		pdata->multicast_hash_table[i] = 0;
 562
 563	if (dev->net->flags & IFF_PROMISC) {
 564		netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 565		pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 566	} else if (dev->net->flags & IFF_ALLMULTI) {
 567		netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 568		pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 569	} else if (!netdev_mc_empty(dev->net)) {
 570		struct netdev_hw_addr *ha;
 571
 572		netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 573
 574		pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 575
 576		netdev_for_each_mc_addr(ha, netdev) {
 577			u32 bitnum = smsc75xx_hash(ha->addr);
 578			pdata->multicast_hash_table[bitnum / 32] |=
 579				(1 << (bitnum % 32));
 580		}
 581	} else {
 582		netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 583		pdata->rfe_ctl |= RFE_CTL_DPF;
 584	}
 585
 586	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 587
 588	/* defer register writes to a sleepable context */
 589	schedule_work(&pdata->set_multicast);
 590}
 591
 592static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 593					    u16 lcladv, u16 rmtadv)
 594{
 595	u32 flow = 0, fct_flow = 0;
 596	int ret;
 597
 598	if (duplex == DUPLEX_FULL) {
 599		u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 600
 601		if (cap & FLOW_CTRL_TX) {
 602			flow = (FLOW_TX_FCEN | 0xFFFF);
 603			/* set fct_flow thresholds to 20% and 80% */
 604			fct_flow = (8 << 8) | 32;
 605		}
 606
 607		if (cap & FLOW_CTRL_RX)
 608			flow |= FLOW_RX_FCEN;
 609
 610		netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 611			  (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 612			  (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 613	} else {
 614		netif_dbg(dev, link, dev->net, "half duplex\n");
 615	}
 616
 617	ret = smsc75xx_write_reg(dev, FLOW, flow);
 618	if (ret < 0) {
 619		netdev_warn(dev->net, "Error writing FLOW\n");
 620		return ret;
 621	}
 622
 623	ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 624	if (ret < 0) {
 625		netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 626		return ret;
 627	}
 628
 629	return 0;
 630}
 631
 632static int smsc75xx_link_reset(struct usbnet *dev)
 633{
 634	struct mii_if_info *mii = &dev->mii;
 635	struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 636	u16 lcladv, rmtadv;
 637	int ret;
 638
 639	/* write to clear phy interrupt status */
 640	smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 641		PHY_INT_SRC_CLEAR_ALL);
 642
 643	ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 644	if (ret < 0) {
 645		netdev_warn(dev->net, "Error writing INT_STS\n");
 646		return ret;
 647	}
 648
 649	mii_check_media(mii, 1, 1);
 650	mii_ethtool_gset(&dev->mii, &ecmd);
 651	lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 652	rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 653
 654	netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 655		  ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 656
 657	return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 658}
 659
 660static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 661{
 662	u32 intdata;
 663
 664	if (urb->actual_length != 4) {
 665		netdev_warn(dev->net, "unexpected urb length %d\n",
 666			    urb->actual_length);
 667		return;
 668	}
 669
 670	memcpy(&intdata, urb->transfer_buffer, 4);
 671	le32_to_cpus(&intdata);
 672
 673	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 674
 675	if (intdata & INT_ENP_PHY_INT)
 676		usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 677	else
 678		netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 679			    intdata);
 680}
 681
 682static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 683{
 684	return MAX_EEPROM_SIZE;
 685}
 686
 687static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 688				       struct ethtool_eeprom *ee, u8 *data)
 689{
 690	struct usbnet *dev = netdev_priv(netdev);
 691
 692	ee->magic = LAN75XX_EEPROM_MAGIC;
 693
 694	return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 695}
 696
 697static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 698				       struct ethtool_eeprom *ee, u8 *data)
 699{
 700	struct usbnet *dev = netdev_priv(netdev);
 701
 702	if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 703		netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 704			    ee->magic);
 705		return -EINVAL;
 706	}
 707
 708	return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 709}
 710
 711static void smsc75xx_ethtool_get_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
 717	wolinfo->supported = SUPPORTED_WAKE;
 718	wolinfo->wolopts = pdata->wolopts;
 719}
 720
 721static int smsc75xx_ethtool_set_wol(struct net_device *net,
 722				    struct ethtool_wolinfo *wolinfo)
 723{
 724	struct usbnet *dev = netdev_priv(net);
 725	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 726	int ret;
 727
 728	pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 729
 730	ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 731	if (ret < 0)
 732		netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 733
 734	return ret;
 735}
 736
 737static const struct ethtool_ops smsc75xx_ethtool_ops = {
 738	.get_link	= usbnet_get_link,
 739	.nway_reset	= usbnet_nway_reset,
 740	.get_drvinfo	= usbnet_get_drvinfo,
 741	.get_msglevel	= usbnet_get_msglevel,
 742	.set_msglevel	= usbnet_set_msglevel,
 743	.get_settings	= usbnet_get_settings,
 744	.set_settings	= usbnet_set_settings,
 745	.get_eeprom_len	= smsc75xx_ethtool_get_eeprom_len,
 746	.get_eeprom	= smsc75xx_ethtool_get_eeprom,
 747	.set_eeprom	= smsc75xx_ethtool_set_eeprom,
 748	.get_wol	= smsc75xx_ethtool_get_wol,
 749	.set_wol	= smsc75xx_ethtool_set_wol,
 750};
 751
 752static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 753{
 754	struct usbnet *dev = netdev_priv(netdev);
 755
 756	if (!netif_running(netdev))
 757		return -EINVAL;
 758
 759	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 760}
 761
 762static void smsc75xx_init_mac_address(struct usbnet *dev)
 763{
 
 
 
 
 
 
 
 
 
 764	/* try reading mac address from EEPROM */
 765	if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 766			dev->net->dev_addr) == 0) {
 767		if (is_valid_ether_addr(dev->net->dev_addr)) {
 768			/* eeprom values are valid so use them */
 769			netif_dbg(dev, ifup, dev->net,
 770				  "MAC address read from EEPROM\n");
 771			return;
 772		}
 773	}
 774
 775	/* no eeprom, or eeprom values are invalid. generate random MAC */
 776	eth_hw_addr_random(dev->net);
 777	netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 778}
 779
 780static int smsc75xx_set_mac_address(struct usbnet *dev)
 781{
 782	u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 783		dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 784	u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 785
 786	int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 787	if (ret < 0) {
 788		netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 789		return ret;
 790	}
 791
 792	ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 793	if (ret < 0) {
 794		netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 795		return ret;
 796	}
 797
 798	addr_hi |= ADDR_FILTX_FB_VALID;
 799	ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 800	if (ret < 0) {
 801		netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 802		return ret;
 803	}
 804
 805	ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 806	if (ret < 0)
 807		netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 808
 809	return ret;
 810}
 811
 812static int smsc75xx_phy_initialize(struct usbnet *dev)
 813{
 814	int bmcr, ret, timeout = 0;
 815
 816	/* Initialize MII structure */
 817	dev->mii.dev = dev->net;
 818	dev->mii.mdio_read = smsc75xx_mdio_read;
 819	dev->mii.mdio_write = smsc75xx_mdio_write;
 820	dev->mii.phy_id_mask = 0x1f;
 821	dev->mii.reg_num_mask = 0x1f;
 822	dev->mii.supports_gmii = 1;
 823	dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 824
 825	/* reset phy and wait for reset to complete */
 826	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 827
 828	do {
 829		msleep(10);
 830		bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 831		if (bmcr < 0) {
 832			netdev_warn(dev->net, "Error reading MII_BMCR\n");
 833			return bmcr;
 834		}
 835		timeout++;
 836	} while ((bmcr & BMCR_RESET) && (timeout < 100));
 837
 838	if (timeout >= 100) {
 839		netdev_warn(dev->net, "timeout on PHY Reset\n");
 840		return -EIO;
 841	}
 842
 843	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 844		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 845		ADVERTISE_PAUSE_ASYM);
 846	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 847		ADVERTISE_1000FULL);
 848
 849	/* read and write to clear phy interrupt status */
 850	ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 851	if (ret < 0) {
 852		netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 853		return ret;
 854	}
 855
 856	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 857
 858	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 859		PHY_INT_MASK_DEFAULT);
 860	mii_nway_restart(&dev->mii);
 861
 862	netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 863	return 0;
 864}
 865
 866static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 867{
 868	int ret = 0;
 869	u32 buf;
 870	bool rxenabled;
 871
 872	ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 873	if (ret < 0) {
 874		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 875		return ret;
 876	}
 877
 878	rxenabled = ((buf & MAC_RX_RXEN) != 0);
 879
 880	if (rxenabled) {
 881		buf &= ~MAC_RX_RXEN;
 882		ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 883		if (ret < 0) {
 884			netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 885			return ret;
 886		}
 887	}
 888
 889	/* add 4 to size for FCS */
 890	buf &= ~MAC_RX_MAX_SIZE;
 891	buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 892
 893	ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 894	if (ret < 0) {
 895		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 896		return ret;
 897	}
 898
 899	if (rxenabled) {
 900		buf |= MAC_RX_RXEN;
 901		ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 902		if (ret < 0) {
 903			netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 904			return ret;
 905		}
 906	}
 907
 908	return 0;
 909}
 910
 911static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 912{
 913	struct usbnet *dev = netdev_priv(netdev);
 914	int ret;
 915
 916	if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 917		return -EINVAL;
 918
 919	ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 920	if (ret < 0) {
 921		netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 922		return ret;
 923	}
 924
 925	return usbnet_change_mtu(netdev, new_mtu);
 926}
 927
 928/* Enable or disable Rx checksum offload engine */
 929static int smsc75xx_set_features(struct net_device *netdev,
 930	netdev_features_t features)
 931{
 932	struct usbnet *dev = netdev_priv(netdev);
 933	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 934	unsigned long flags;
 935	int ret;
 936
 937	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 938
 939	if (features & NETIF_F_RXCSUM)
 940		pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 941	else
 942		pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 943
 944	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 945	/* it's racing here! */
 946
 947	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 948	if (ret < 0)
 949		netdev_warn(dev->net, "Error writing RFE_CTL\n");
 950
 951	return ret;
 952}
 953
 954static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 955{
 956	int timeout = 0;
 957
 958	do {
 959		u32 buf;
 960		int ret;
 961
 962		ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 963
 964		if (ret < 0) {
 965			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 966			return ret;
 967		}
 968
 969		if (buf & PMT_CTL_DEV_RDY)
 970			return 0;
 971
 972		msleep(10);
 973		timeout++;
 974	} while (timeout < 100);
 975
 976	netdev_warn(dev->net, "timeout waiting for device ready\n");
 977	return -EIO;
 978}
 979
 980static int smsc75xx_reset(struct usbnet *dev)
 981{
 982	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 983	u32 buf;
 984	int ret = 0, timeout;
 985
 986	netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 987
 988	ret = smsc75xx_wait_ready(dev, 0);
 989	if (ret < 0) {
 990		netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
 991		return ret;
 992	}
 993
 994	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 995	if (ret < 0) {
 996		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
 997		return ret;
 998	}
 999
1000	buf |= HW_CFG_LRST;
1001
1002	ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1003	if (ret < 0) {
1004		netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1005		return ret;
1006	}
1007
1008	timeout = 0;
1009	do {
1010		msleep(10);
1011		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1012		if (ret < 0) {
1013			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1014			return ret;
1015		}
1016		timeout++;
1017	} while ((buf & HW_CFG_LRST) && (timeout < 100));
1018
1019	if (timeout >= 100) {
1020		netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1021		return -EIO;
1022	}
1023
1024	netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1025
1026	ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1027	if (ret < 0) {
1028		netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1029		return ret;
1030	}
1031
1032	buf |= PMT_CTL_PHY_RST;
1033
1034	ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1035	if (ret < 0) {
1036		netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1037		return ret;
1038	}
1039
1040	timeout = 0;
1041	do {
1042		msleep(10);
1043		ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1044		if (ret < 0) {
1045			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1046			return ret;
1047		}
1048		timeout++;
1049	} while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1050
1051	if (timeout >= 100) {
1052		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1053		return -EIO;
1054	}
1055
1056	netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1057
1058	ret = smsc75xx_set_mac_address(dev);
1059	if (ret < 0) {
1060		netdev_warn(dev->net, "Failed to set mac address\n");
1061		return ret;
1062	}
1063
1064	netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1065		  dev->net->dev_addr);
1066
1067	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1068	if (ret < 0) {
1069		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1070		return ret;
1071	}
1072
1073	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1074		  buf);
1075
1076	buf |= HW_CFG_BIR;
1077
1078	ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1079	if (ret < 0) {
1080		netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1081		return ret;
1082	}
1083
1084	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1085	if (ret < 0) {
1086		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1087		return ret;
1088	}
1089
1090	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1091		  buf);
1092
1093	if (!turbo_mode) {
1094		buf = 0;
1095		dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1096	} else if (dev->udev->speed == USB_SPEED_HIGH) {
1097		buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1098		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1099	} else {
1100		buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1101		dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1102	}
1103
1104	netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1105		  (ulong)dev->rx_urb_size);
1106
1107	ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1108	if (ret < 0) {
1109		netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1110		return ret;
1111	}
1112
1113	ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1114	if (ret < 0) {
1115		netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1116		return ret;
1117	}
1118
1119	netif_dbg(dev, ifup, dev->net,
1120		  "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1121
1122	ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1123	if (ret < 0) {
1124		netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1125		return ret;
1126	}
1127
1128	ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1129	if (ret < 0) {
1130		netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1131		return ret;
1132	}
1133
1134	netif_dbg(dev, ifup, dev->net,
1135		  "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1136
1137	if (turbo_mode) {
1138		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1139		if (ret < 0) {
1140			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1141			return ret;
1142		}
1143
1144		netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1145
1146		buf |= (HW_CFG_MEF | HW_CFG_BCE);
1147
1148		ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1149		if (ret < 0) {
1150			netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1151			return ret;
1152		}
1153
1154		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1155		if (ret < 0) {
1156			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1157			return ret;
1158		}
1159
1160		netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1161	}
1162
1163	/* set FIFO sizes */
1164	buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1165	ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1166	if (ret < 0) {
1167		netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1168		return ret;
1169	}
1170
1171	netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1172
1173	buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1174	ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1175	if (ret < 0) {
1176		netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1177		return ret;
1178	}
1179
1180	netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1181
1182	ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1183	if (ret < 0) {
1184		netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1185		return ret;
1186	}
1187
1188	ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1189	if (ret < 0) {
1190		netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1191		return ret;
1192	}
1193
1194	netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1195
1196	ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1197	if (ret < 0) {
1198		netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1199		return ret;
1200	}
1201
1202	/* only set default GPIO/LED settings if no EEPROM is detected */
1203	if (!(buf & E2P_CMD_LOADED)) {
1204		ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1205		if (ret < 0) {
1206			netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1207			return ret;
1208		}
1209
1210		buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1211		buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1212
1213		ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1214		if (ret < 0) {
1215			netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1216			return ret;
1217		}
1218	}
1219
1220	ret = smsc75xx_write_reg(dev, FLOW, 0);
1221	if (ret < 0) {
1222		netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1223		return ret;
1224	}
1225
1226	ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1227	if (ret < 0) {
1228		netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1229		return ret;
1230	}
1231
1232	/* Don't need rfe_ctl_lock during initialisation */
1233	ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1234	if (ret < 0) {
1235		netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1236		return ret;
1237	}
1238
1239	pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1240
1241	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1242	if (ret < 0) {
1243		netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1244		return ret;
1245	}
1246
1247	ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1248	if (ret < 0) {
1249		netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1250		return ret;
1251	}
1252
1253	netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1254		  pdata->rfe_ctl);
1255
1256	/* Enable or disable checksum offload engines */
1257	smsc75xx_set_features(dev->net, dev->net->features);
1258
1259	smsc75xx_set_multicast(dev->net);
1260
1261	ret = smsc75xx_phy_initialize(dev);
1262	if (ret < 0) {
1263		netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1264		return ret;
1265	}
1266
1267	ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1268	if (ret < 0) {
1269		netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1270		return ret;
1271	}
1272
1273	/* enable PHY interrupts */
1274	buf |= INT_ENP_PHY_INT;
1275
1276	ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1277	if (ret < 0) {
1278		netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1279		return ret;
1280	}
1281
1282	/* allow mac to detect speed and duplex from phy */
1283	ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1284	if (ret < 0) {
1285		netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1286		return ret;
1287	}
1288
1289	buf |= (MAC_CR_ADD | MAC_CR_ASD);
1290	ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1291	if (ret < 0) {
1292		netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1293		return ret;
1294	}
1295
1296	ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1297	if (ret < 0) {
1298		netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1299		return ret;
1300	}
1301
1302	buf |= MAC_TX_TXEN;
1303
1304	ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1305	if (ret < 0) {
1306		netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1307		return ret;
1308	}
1309
1310	netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1311
1312	ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1313	if (ret < 0) {
1314		netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1315		return ret;
1316	}
1317
1318	buf |= FCT_TX_CTL_EN;
1319
1320	ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1321	if (ret < 0) {
1322		netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1323		return ret;
1324	}
1325
1326	netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1327
1328	ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1329	if (ret < 0) {
1330		netdev_warn(dev->net, "Failed to set max rx frame length\n");
1331		return ret;
1332	}
1333
1334	ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1335	if (ret < 0) {
1336		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1337		return ret;
1338	}
1339
1340	buf |= MAC_RX_RXEN;
1341
1342	ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1343	if (ret < 0) {
1344		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1345		return ret;
1346	}
1347
1348	netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1349
1350	ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1351	if (ret < 0) {
1352		netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1353		return ret;
1354	}
1355
1356	buf |= FCT_RX_CTL_EN;
1357
1358	ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1359	if (ret < 0) {
1360		netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1361		return ret;
1362	}
1363
1364	netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1365
1366	netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1367	return 0;
1368}
1369
1370static const struct net_device_ops smsc75xx_netdev_ops = {
1371	.ndo_open		= usbnet_open,
1372	.ndo_stop		= usbnet_stop,
1373	.ndo_start_xmit		= usbnet_start_xmit,
1374	.ndo_tx_timeout		= usbnet_tx_timeout,
1375	.ndo_change_mtu		= smsc75xx_change_mtu,
1376	.ndo_set_mac_address 	= eth_mac_addr,
1377	.ndo_validate_addr	= eth_validate_addr,
1378	.ndo_do_ioctl 		= smsc75xx_ioctl,
1379	.ndo_set_rx_mode	= smsc75xx_set_multicast,
1380	.ndo_set_features	= smsc75xx_set_features,
1381};
1382
1383static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1384{
1385	struct smsc75xx_priv *pdata = NULL;
1386	int ret;
1387
1388	printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1389
1390	ret = usbnet_get_endpoints(dev, intf);
1391	if (ret < 0) {
1392		netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1393		return ret;
1394	}
1395
1396	dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1397					      GFP_KERNEL);
1398
1399	pdata = (struct smsc75xx_priv *)(dev->data[0]);
1400	if (!pdata)
1401		return -ENOMEM;
1402
1403	pdata->dev = dev;
1404
1405	spin_lock_init(&pdata->rfe_ctl_lock);
1406	mutex_init(&pdata->dataport_mutex);
1407
1408	INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1409
1410	if (DEFAULT_TX_CSUM_ENABLE)
1411		dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1412
1413	if (DEFAULT_RX_CSUM_ENABLE)
1414		dev->net->features |= NETIF_F_RXCSUM;
1415
1416	dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1417				NETIF_F_RXCSUM;
1418
1419	ret = smsc75xx_wait_ready(dev, 0);
1420	if (ret < 0) {
1421		netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1422		return ret;
1423	}
1424
1425	smsc75xx_init_mac_address(dev);
1426
1427	/* Init all registers */
1428	ret = smsc75xx_reset(dev);
1429	if (ret < 0) {
1430		netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1431		return ret;
1432	}
1433
1434	dev->net->netdev_ops = &smsc75xx_netdev_ops;
1435	dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1436	dev->net->flags |= IFF_MULTICAST;
1437	dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1438	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1439	return 0;
1440}
1441
1442static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1443{
1444	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1445	if (pdata) {
1446		netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1447		kfree(pdata);
1448		pdata = NULL;
1449		dev->data[0] = 0;
1450	}
1451}
1452
1453static u16 smsc_crc(const u8 *buffer, size_t len)
1454{
1455	return bitrev16(crc16(0xFFFF, buffer, len));
1456}
1457
1458static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1459			       u32 wuf_mask1)
1460{
1461	int cfg_base = WUF_CFGX + filter * 4;
1462	int mask_base = WUF_MASKX + filter * 16;
1463	int ret;
1464
1465	ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1466	if (ret < 0) {
1467		netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1468		return ret;
1469	}
1470
1471	ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1472	if (ret < 0) {
1473		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1474		return ret;
1475	}
1476
1477	ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1478	if (ret < 0) {
1479		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1480		return ret;
1481	}
1482
1483	ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1484	if (ret < 0) {
1485		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1486		return ret;
1487	}
1488
1489	ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1490	if (ret < 0) {
1491		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1492		return ret;
1493	}
1494
1495	return 0;
1496}
1497
1498static int smsc75xx_enter_suspend0(struct usbnet *dev)
1499{
1500	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1501	u32 val;
1502	int ret;
1503
1504	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1505	if (ret < 0) {
1506		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1507		return ret;
1508	}
1509
1510	val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1511	val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1512
1513	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1514	if (ret < 0) {
1515		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1516		return ret;
1517	}
1518
1519	pdata->suspend_flags |= SUSPEND_SUSPEND0;
1520
1521	return 0;
1522}
1523
1524static int smsc75xx_enter_suspend1(struct usbnet *dev)
1525{
1526	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1527	u32 val;
1528	int ret;
1529
1530	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1531	if (ret < 0) {
1532		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1533		return ret;
1534	}
1535
1536	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1537	val |= PMT_CTL_SUS_MODE_1;
1538
1539	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1540	if (ret < 0) {
1541		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1542		return ret;
1543	}
1544
1545	/* clear wol status, enable energy detection */
1546	val &= ~PMT_CTL_WUPS;
1547	val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1548
1549	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1550	if (ret < 0) {
1551		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1552		return ret;
1553	}
1554
1555	pdata->suspend_flags |= SUSPEND_SUSPEND1;
1556
1557	return 0;
1558}
1559
1560static int smsc75xx_enter_suspend2(struct usbnet *dev)
1561{
1562	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1563	u32 val;
1564	int ret;
1565
1566	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1567	if (ret < 0) {
1568		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1569		return ret;
1570	}
1571
1572	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1573	val |= PMT_CTL_SUS_MODE_2;
1574
1575	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1576	if (ret < 0) {
1577		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1578		return ret;
1579	}
1580
1581	pdata->suspend_flags |= SUSPEND_SUSPEND2;
1582
1583	return 0;
1584}
1585
1586static int smsc75xx_enter_suspend3(struct usbnet *dev)
1587{
1588	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1589	u32 val;
1590	int ret;
1591
1592	ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1593	if (ret < 0) {
1594		netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1595		return ret;
1596	}
1597
1598	if (val & FCT_RX_CTL_RXUSED) {
1599		netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1600		return -EBUSY;
1601	}
1602
1603	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1604	if (ret < 0) {
1605		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1606		return ret;
1607	}
1608
1609	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1610	val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1611
1612	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1613	if (ret < 0) {
1614		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1615		return ret;
1616	}
1617
1618	/* clear wol status */
1619	val &= ~PMT_CTL_WUPS;
1620	val |= PMT_CTL_WUPS_WOL;
1621
1622	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1623	if (ret < 0) {
1624		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1625		return ret;
1626	}
1627
1628	pdata->suspend_flags |= SUSPEND_SUSPEND3;
1629
1630	return 0;
1631}
1632
1633static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1634{
1635	struct mii_if_info *mii = &dev->mii;
1636	int ret;
1637
1638	netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1639
1640	/* read to clear */
1641	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1642	if (ret < 0) {
1643		netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1644		return ret;
1645	}
1646
1647	/* enable interrupt source */
1648	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1649	if (ret < 0) {
1650		netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1651		return ret;
1652	}
1653
1654	ret |= mask;
1655
1656	smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1657
1658	return 0;
1659}
1660
1661static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1662{
1663	struct mii_if_info *mii = &dev->mii;
1664	int ret;
1665
1666	/* first, a dummy read, needed to latch some MII phys */
1667	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1668	if (ret < 0) {
1669		netdev_warn(dev->net, "Error reading MII_BMSR\n");
1670		return ret;
1671	}
1672
1673	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1674	if (ret < 0) {
1675		netdev_warn(dev->net, "Error reading MII_BMSR\n");
1676		return ret;
1677	}
1678
1679	return !!(ret & BMSR_LSTATUS);
1680}
1681
1682static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1683{
1684	int ret;
1685
1686	if (!netif_running(dev->net)) {
1687		/* interface is ifconfig down so fully power down hw */
1688		netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1689		return smsc75xx_enter_suspend2(dev);
1690	}
1691
1692	if (!link_up) {
1693		/* link is down so enter EDPD mode */
1694		netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1695
1696		/* enable PHY wakeup events for if cable is attached */
1697		ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1698			PHY_INT_MASK_ANEG_COMP);
1699		if (ret < 0) {
1700			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1701			return ret;
1702		}
1703
1704		netdev_info(dev->net, "entering SUSPEND1 mode\n");
1705		return smsc75xx_enter_suspend1(dev);
1706	}
1707
1708	/* enable PHY wakeup events so we remote wakeup if cable is pulled */
1709	ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1710		PHY_INT_MASK_LINK_DOWN);
1711	if (ret < 0) {
1712		netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1713		return ret;
1714	}
1715
1716	netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1717	return smsc75xx_enter_suspend3(dev);
1718}
1719
1720static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1721{
1722	struct usbnet *dev = usb_get_intfdata(intf);
1723	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1724	u32 val, link_up;
1725	int ret;
1726
1727	ret = usbnet_suspend(intf, message);
1728	if (ret < 0) {
1729		netdev_warn(dev->net, "usbnet_suspend error\n");
1730		return ret;
1731	}
1732
1733	if (pdata->suspend_flags) {
1734		netdev_warn(dev->net, "error during last resume\n");
1735		pdata->suspend_flags = 0;
1736	}
1737
1738	/* determine if link is up using only _nopm functions */
1739	link_up = smsc75xx_link_ok_nopm(dev);
1740
1741	if (message.event == PM_EVENT_AUTO_SUSPEND) {
1742		ret = smsc75xx_autosuspend(dev, link_up);
1743		goto done;
1744	}
1745
1746	/* if we get this far we're not autosuspending */
1747	/* if no wol options set, or if link is down and we're not waking on
1748	 * PHY activity, enter lowest power SUSPEND2 mode
1749	 */
1750	if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1751		!(link_up || (pdata->wolopts & WAKE_PHY))) {
1752		netdev_info(dev->net, "entering SUSPEND2 mode\n");
1753
1754		/* disable energy detect (link up) & wake up events */
1755		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1756		if (ret < 0) {
1757			netdev_warn(dev->net, "Error reading WUCSR\n");
1758			goto done;
1759		}
1760
1761		val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1762
1763		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1764		if (ret < 0) {
1765			netdev_warn(dev->net, "Error writing WUCSR\n");
1766			goto done;
1767		}
1768
1769		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1770		if (ret < 0) {
1771			netdev_warn(dev->net, "Error reading PMT_CTL\n");
1772			goto done;
1773		}
1774
1775		val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1776
1777		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1778		if (ret < 0) {
1779			netdev_warn(dev->net, "Error writing PMT_CTL\n");
1780			goto done;
1781		}
1782
1783		ret = smsc75xx_enter_suspend2(dev);
1784		goto done;
1785	}
1786
1787	if (pdata->wolopts & WAKE_PHY) {
1788		ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1789			(PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1790		if (ret < 0) {
1791			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1792			goto done;
1793		}
1794
1795		/* if link is down then configure EDPD and enter SUSPEND1,
1796		 * otherwise enter SUSPEND0 below
1797		 */
1798		if (!link_up) {
1799			struct mii_if_info *mii = &dev->mii;
1800			netdev_info(dev->net, "entering SUSPEND1 mode\n");
1801
1802			/* enable energy detect power-down mode */
1803			ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1804				PHY_MODE_CTRL_STS);
1805			if (ret < 0) {
1806				netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1807				goto done;
1808			}
1809
1810			ret |= MODE_CTRL_STS_EDPWRDOWN;
1811
1812			smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1813				PHY_MODE_CTRL_STS, ret);
1814
1815			/* enter SUSPEND1 mode */
1816			ret = smsc75xx_enter_suspend1(dev);
1817			goto done;
1818		}
1819	}
1820
1821	if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1822		int i, filter = 0;
1823
1824		/* disable all filters */
1825		for (i = 0; i < WUF_NUM; i++) {
1826			ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1827			if (ret < 0) {
1828				netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1829				goto done;
1830			}
1831		}
1832
1833		if (pdata->wolopts & WAKE_MCAST) {
1834			const u8 mcast[] = {0x01, 0x00, 0x5E};
1835			netdev_info(dev->net, "enabling multicast detection\n");
1836
1837			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1838				| smsc_crc(mcast, 3);
1839			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1840			if (ret < 0) {
1841				netdev_warn(dev->net, "Error writing wakeup filter\n");
1842				goto done;
1843			}
1844		}
1845
1846		if (pdata->wolopts & WAKE_ARP) {
1847			const u8 arp[] = {0x08, 0x06};
1848			netdev_info(dev->net, "enabling ARP detection\n");
1849
1850			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1851				| smsc_crc(arp, 2);
1852			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1853			if (ret < 0) {
1854				netdev_warn(dev->net, "Error writing wakeup filter\n");
1855				goto done;
1856			}
1857		}
1858
1859		/* clear any pending pattern match packet status */
1860		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1861		if (ret < 0) {
1862			netdev_warn(dev->net, "Error reading WUCSR\n");
1863			goto done;
1864		}
1865
1866		val |= WUCSR_WUFR;
1867
1868		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1869		if (ret < 0) {
1870			netdev_warn(dev->net, "Error writing WUCSR\n");
1871			goto done;
1872		}
1873
1874		netdev_info(dev->net, "enabling packet match detection\n");
1875		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1876		if (ret < 0) {
1877			netdev_warn(dev->net, "Error reading WUCSR\n");
1878			goto done;
1879		}
1880
1881		val |= WUCSR_WUEN;
1882
1883		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1884		if (ret < 0) {
1885			netdev_warn(dev->net, "Error writing WUCSR\n");
1886			goto done;
1887		}
1888	} else {
1889		netdev_info(dev->net, "disabling packet match detection\n");
1890		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1891		if (ret < 0) {
1892			netdev_warn(dev->net, "Error reading WUCSR\n");
1893			goto done;
1894		}
1895
1896		val &= ~WUCSR_WUEN;
1897
1898		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1899		if (ret < 0) {
1900			netdev_warn(dev->net, "Error writing WUCSR\n");
1901			goto done;
1902		}
1903	}
1904
1905	/* disable magic, bcast & unicast wakeup sources */
1906	ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1907	if (ret < 0) {
1908		netdev_warn(dev->net, "Error reading WUCSR\n");
1909		goto done;
1910	}
1911
1912	val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1913
1914	ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1915	if (ret < 0) {
1916		netdev_warn(dev->net, "Error writing WUCSR\n");
1917		goto done;
1918	}
1919
1920	if (pdata->wolopts & WAKE_PHY) {
1921		netdev_info(dev->net, "enabling PHY wakeup\n");
1922
1923		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1924		if (ret < 0) {
1925			netdev_warn(dev->net, "Error reading PMT_CTL\n");
1926			goto done;
1927		}
1928
1929		/* clear wol status, enable energy detection */
1930		val &= ~PMT_CTL_WUPS;
1931		val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1932
1933		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1934		if (ret < 0) {
1935			netdev_warn(dev->net, "Error writing PMT_CTL\n");
1936			goto done;
1937		}
1938	}
1939
1940	if (pdata->wolopts & WAKE_MAGIC) {
1941		netdev_info(dev->net, "enabling magic packet wakeup\n");
1942		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1943		if (ret < 0) {
1944			netdev_warn(dev->net, "Error reading WUCSR\n");
1945			goto done;
1946		}
1947
1948		/* clear any pending magic packet status */
1949		val |= WUCSR_MPR | WUCSR_MPEN;
1950
1951		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1952		if (ret < 0) {
1953			netdev_warn(dev->net, "Error writing WUCSR\n");
1954			goto done;
1955		}
1956	}
1957
1958	if (pdata->wolopts & WAKE_BCAST) {
1959		netdev_info(dev->net, "enabling broadcast 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_BCAST_FR | WUCSR_BCST_EN;
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	if (pdata->wolopts & WAKE_UCAST) {
1976		netdev_info(dev->net, "enabling unicast detection\n");
1977		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1978		if (ret < 0) {
1979			netdev_warn(dev->net, "Error reading WUCSR\n");
1980			goto done;
1981		}
1982
1983		val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1984
1985		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1986		if (ret < 0) {
1987			netdev_warn(dev->net, "Error writing WUCSR\n");
1988			goto done;
1989		}
1990	}
1991
1992	/* enable receiver to enable frame reception */
1993	ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1994	if (ret < 0) {
1995		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1996		goto done;
1997	}
1998
1999	val |= MAC_RX_RXEN;
2000
2001	ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2002	if (ret < 0) {
2003		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2004		goto done;
2005	}
2006
2007	/* some wol options are enabled, so enter SUSPEND0 */
2008	netdev_info(dev->net, "entering SUSPEND0 mode\n");
2009	ret = smsc75xx_enter_suspend0(dev);
2010
2011done:
2012	/*
2013	 * TODO: resume() might need to handle the suspend failure
2014	 * in system sleep
2015	 */
2016	if (ret && PMSG_IS_AUTO(message))
2017		usbnet_resume(intf);
2018	return ret;
2019}
2020
2021static int smsc75xx_resume(struct usb_interface *intf)
2022{
2023	struct usbnet *dev = usb_get_intfdata(intf);
2024	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2025	u8 suspend_flags = pdata->suspend_flags;
2026	int ret;
2027	u32 val;
2028
2029	netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2030
2031	/* do this first to ensure it's cleared even in error case */
2032	pdata->suspend_flags = 0;
2033
2034	if (suspend_flags & SUSPEND_ALLMODES) {
2035		/* Disable wakeup sources */
2036		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2037		if (ret < 0) {
2038			netdev_warn(dev->net, "Error reading WUCSR\n");
2039			return ret;
2040		}
2041
2042		val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2043			| WUCSR_BCST_EN);
2044
2045		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2046		if (ret < 0) {
2047			netdev_warn(dev->net, "Error writing WUCSR\n");
2048			return ret;
2049		}
2050
2051		/* clear wake-up status */
2052		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2053		if (ret < 0) {
2054			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2055			return ret;
2056		}
2057
2058		val &= ~PMT_CTL_WOL_EN;
2059		val |= PMT_CTL_WUPS;
2060
2061		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2062		if (ret < 0) {
2063			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2064			return ret;
2065		}
2066	}
2067
2068	if (suspend_flags & SUSPEND_SUSPEND2) {
2069		netdev_info(dev->net, "resuming from SUSPEND2\n");
2070
2071		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2072		if (ret < 0) {
2073			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2074			return ret;
2075		}
2076
2077		val |= PMT_CTL_PHY_PWRUP;
2078
2079		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2080		if (ret < 0) {
2081			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2082			return ret;
2083		}
2084	}
2085
2086	ret = smsc75xx_wait_ready(dev, 1);
2087	if (ret < 0) {
2088		netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2089		return ret;
2090	}
2091
2092	return usbnet_resume(intf);
2093}
2094
2095static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2096				     u32 rx_cmd_a, u32 rx_cmd_b)
2097{
2098	if (!(dev->net->features & NETIF_F_RXCSUM) ||
2099	    unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2100		skb->ip_summed = CHECKSUM_NONE;
2101	} else {
2102		skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2103		skb->ip_summed = CHECKSUM_COMPLETE;
2104	}
2105}
2106
2107static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2108{
2109	/* This check is no longer done by usbnet */
2110	if (skb->len < dev->net->hard_header_len)
2111		return 0;
2112
2113	while (skb->len > 0) {
2114		u32 rx_cmd_a, rx_cmd_b, align_count, size;
2115		struct sk_buff *ax_skb;
2116		unsigned char *packet;
2117
2118		memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2119		le32_to_cpus(&rx_cmd_a);
2120		skb_pull(skb, 4);
2121
2122		memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2123		le32_to_cpus(&rx_cmd_b);
2124		skb_pull(skb, 4 + RXW_PADDING);
2125
2126		packet = skb->data;
2127
2128		/* get the packet length */
2129		size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2130		align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2131
2132		if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2133			netif_dbg(dev, rx_err, dev->net,
2134				  "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2135			dev->net->stats.rx_errors++;
2136			dev->net->stats.rx_dropped++;
2137
2138			if (rx_cmd_a & RX_CMD_A_FCS)
2139				dev->net->stats.rx_crc_errors++;
2140			else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2141				dev->net->stats.rx_frame_errors++;
2142		} else {
2143			/* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2144			if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2145				netif_dbg(dev, rx_err, dev->net,
2146					  "size err rx_cmd_a=0x%08x\n",
2147					  rx_cmd_a);
2148				return 0;
2149			}
2150
2151			/* last frame in this batch */
2152			if (skb->len == size) {
2153				smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2154					rx_cmd_b);
2155
2156				skb_trim(skb, skb->len - 4); /* remove fcs */
2157				skb->truesize = size + sizeof(struct sk_buff);
2158
2159				return 1;
2160			}
2161
2162			ax_skb = skb_clone(skb, GFP_ATOMIC);
2163			if (unlikely(!ax_skb)) {
2164				netdev_warn(dev->net, "Error allocating skb\n");
2165				return 0;
2166			}
2167
2168			ax_skb->len = size;
2169			ax_skb->data = packet;
2170			skb_set_tail_pointer(ax_skb, size);
2171
2172			smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2173				rx_cmd_b);
2174
2175			skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2176			ax_skb->truesize = size + sizeof(struct sk_buff);
2177
2178			usbnet_skb_return(dev, ax_skb);
2179		}
2180
2181		skb_pull(skb, size);
2182
2183		/* padding bytes before the next frame starts */
2184		if (skb->len)
2185			skb_pull(skb, align_count);
2186	}
2187
2188	if (unlikely(skb->len < 0)) {
2189		netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
2190		return 0;
2191	}
2192
2193	return 1;
2194}
2195
2196static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2197					 struct sk_buff *skb, gfp_t flags)
2198{
2199	u32 tx_cmd_a, tx_cmd_b;
2200
2201	if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2202		struct sk_buff *skb2 =
2203			skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2204		dev_kfree_skb_any(skb);
2205		skb = skb2;
2206		if (!skb)
2207			return NULL;
2208	}
2209
2210	tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2211
2212	if (skb->ip_summed == CHECKSUM_PARTIAL)
2213		tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2214
2215	if (skb_is_gso(skb)) {
2216		u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2217		tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2218
2219		tx_cmd_a |= TX_CMD_A_LSO;
2220	} else {
2221		tx_cmd_b = 0;
2222	}
2223
2224	skb_push(skb, 4);
2225	cpu_to_le32s(&tx_cmd_b);
2226	memcpy(skb->data, &tx_cmd_b, 4);
2227
2228	skb_push(skb, 4);
2229	cpu_to_le32s(&tx_cmd_a);
2230	memcpy(skb->data, &tx_cmd_a, 4);
2231
2232	return skb;
2233}
2234
2235static int smsc75xx_manage_power(struct usbnet *dev, int on)
2236{
2237	dev->intf->needs_remote_wakeup = on;
2238	return 0;
2239}
2240
2241static const struct driver_info smsc75xx_info = {
2242	.description	= "smsc75xx USB 2.0 Gigabit Ethernet",
2243	.bind		= smsc75xx_bind,
2244	.unbind		= smsc75xx_unbind,
2245	.link_reset	= smsc75xx_link_reset,
2246	.reset		= smsc75xx_reset,
2247	.rx_fixup	= smsc75xx_rx_fixup,
2248	.tx_fixup	= smsc75xx_tx_fixup,
2249	.status		= smsc75xx_status,
2250	.manage_power	= smsc75xx_manage_power,
2251	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2252};
2253
2254static const struct usb_device_id products[] = {
2255	{
2256		/* SMSC7500 USB Gigabit Ethernet Device */
2257		USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2258		.driver_info = (unsigned long) &smsc75xx_info,
2259	},
2260	{
2261		/* SMSC7500 USB Gigabit Ethernet Device */
2262		USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2263		.driver_info = (unsigned long) &smsc75xx_info,
2264	},
2265	{ },		/* END */
2266};
2267MODULE_DEVICE_TABLE(usb, products);
2268
2269static struct usb_driver smsc75xx_driver = {
2270	.name		= SMSC_CHIPNAME,
2271	.id_table	= products,
2272	.probe		= usbnet_probe,
2273	.suspend	= smsc75xx_suspend,
2274	.resume		= smsc75xx_resume,
2275	.reset_resume	= smsc75xx_resume,
2276	.disconnect	= usbnet_disconnect,
2277	.disable_hub_initiated_lpm = 1,
2278	.supports_autosuspend = 1,
2279};
2280
2281module_usb_driver(smsc75xx_driver);
2282
2283MODULE_AUTHOR("Nancy Lin");
2284MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2285MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2286MODULE_LICENSE("GPL");