1 /***************************************************************************
   2 *
   3 * Copyright (C) 2007-2008 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 <linux/of_net.h>
  33#include "smsc95xx.h"
  34
  35#define SMSC_CHIPNAME			"smsc95xx"
  36#define SMSC_DRIVER_VERSION		"1.0.6"
  37#define HS_USB_PKT_SIZE			(512)
  38#define FS_USB_PKT_SIZE			(64)
  39#define DEFAULT_HS_BURST_CAP_SIZE	(16 * 1024 + 5 * HS_USB_PKT_SIZE)
  40#define DEFAULT_FS_BURST_CAP_SIZE	(6 * 1024 + 33 * FS_USB_PKT_SIZE)
  41#define DEFAULT_BULK_IN_DELAY		(0x00002000)
  42#define MAX_SINGLE_PACKET_SIZE		(2048)
  43#define LAN95XX_EEPROM_MAGIC		(0x9500)
  44#define EEPROM_MAC_OFFSET		(0x01)
  45#define DEFAULT_TX_CSUM_ENABLE		(true)
  46#define DEFAULT_RX_CSUM_ENABLE		(true)
  47#define SMSC95XX_INTERNAL_PHY_ID	(1)
  48#define SMSC95XX_TX_OVERHEAD		(8)
  49#define SMSC95XX_TX_OVERHEAD_CSUM	(12)
  50#define SUPPORTED_WAKE			(WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  51					 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  52
  53#define FEATURE_8_WAKEUP_FILTERS	(0x01)
  54#define FEATURE_PHY_NLP_CROSSOVER	(0x02)
  55#define FEATURE_REMOTE_WAKEUP		(0x04)
  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
  64#define CARRIER_CHECK_DELAY (2 * HZ)
  65
  66struct smsc95xx_priv {
  67	u32 chip_id;
  68	u32 mac_cr;
  69	u32 hash_hi;
  70	u32 hash_lo;
  71	u32 wolopts;
  72	spinlock_t mac_cr_lock;
  73	u8 features;
  74	u8 suspend_flags;
  75	u8 mdix_ctrl;
  76	bool link_ok;
  77	struct delayed_work carrier_check;
  78	struct usbnet *dev;
  79};
  80
  81static bool turbo_mode = true;
  82module_param(turbo_mode, bool, 0644);
  83MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  84
  85static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  86					    u32 *data, int in_pm)
  87{
  88	u32 buf;
  89	int ret;
  90	int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  91
  92	BUG_ON(!dev);
  93
  94	if (!in_pm)
  95		fn = usbnet_read_cmd;
  96	else
  97		fn = usbnet_read_cmd_nopm;
  98
  99	ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 100		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 101		 0, index, &buf, 4);
 102	if (unlikely(ret < 0)) {
 103		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 104			    index, ret);
 105		return ret;
 106	}
 107
 108	le32_to_cpus(&buf);
 109	*data = buf;
 110
 111	return ret;
 112}
 113
 114static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 115					     u32 data, int in_pm)
 116{
 117	u32 buf;
 118	int ret;
 119	int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 120
 121	BUG_ON(!dev);
 122
 123	if (!in_pm)
 124		fn = usbnet_write_cmd;
 125	else
 126		fn = usbnet_write_cmd_nopm;
 127
 128	buf = data;
 129	cpu_to_le32s(&buf);
 130
 131	ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 132		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 133		 0, index, &buf, 4);
 134	if (unlikely(ret < 0))
 135		netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 136			    index, ret);
 137
 138	return ret;
 139}
 140
 141static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 142					       u32 *data)
 143{
 144	return __smsc95xx_read_reg(dev, index, data, 1);
 145}
 146
 147static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 148						u32 data)
 149{
 150	return __smsc95xx_write_reg(dev, index, data, 1);
 151}
 152
 153static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 154					  u32 *data)
 155{
 156	return __smsc95xx_read_reg(dev, index, data, 0);
 157}
 158
 159static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 160					   u32 data)
 161{
 162	return __smsc95xx_write_reg(dev, index, data, 0);
 163}
 164
 165/* Loop until the read is completed with timeout
 166 * called with phy_mutex held */
 167static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 168						     int in_pm)
 169{
 170	unsigned long start_time = jiffies;
 171	u32 val;
 172	int ret;
 173
 174	do {
 175		ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 176		if (ret < 0) {
 177			netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 178			return ret;
 179		}
 180
 181		if (!(val & MII_BUSY_))
 182			return 0;
 183	} while (!time_after(jiffies, start_time + HZ));
 184
 185	return -EIO;
 186}
 187
 188static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 189				int in_pm)
 190{
 191	struct usbnet *dev = netdev_priv(netdev);
 192	u32 val, addr;
 193	int ret;
 194
 195	mutex_lock(&dev->phy_mutex);
 196
 197	/* confirm MII not busy */
 198	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 199	if (ret < 0) {
 200		netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 201		goto done;
 202	}
 203
 204	/* set the address, index & direction (read from PHY) */
 205	phy_id &= dev->mii.phy_id_mask;
 206	idx &= dev->mii.reg_num_mask;
 207	addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 208	ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 209	if (ret < 0) {
 210		netdev_warn(dev->net, "Error writing MII_ADDR\n");
 211		goto done;
 212	}
 213
 214	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 215	if (ret < 0) {
 216		netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 217		goto done;
 218	}
 219
 220	ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 221	if (ret < 0) {
 222		netdev_warn(dev->net, "Error reading MII_DATA\n");
 223		goto done;
 224	}
 225
 226	ret = (u16)(val & 0xFFFF);
 227
 228done:
 229	mutex_unlock(&dev->phy_mutex);
 230	return ret;
 231}
 232
 233static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 234				  int idx, int regval, int in_pm)
 235{
 236	struct usbnet *dev = netdev_priv(netdev);
 237	u32 val, addr;
 238	int ret;
 239
 240	mutex_lock(&dev->phy_mutex);
 241
 242	/* confirm MII not busy */
 243	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 244	if (ret < 0) {
 245		netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 246		goto done;
 247	}
 248
 249	val = regval;
 250	ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 251	if (ret < 0) {
 252		netdev_warn(dev->net, "Error writing MII_DATA\n");
 253		goto done;
 254	}
 255
 256	/* set the address, index & direction (write to PHY) */
 257	phy_id &= dev->mii.phy_id_mask;
 258	idx &= dev->mii.reg_num_mask;
 259	addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 260	ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 261	if (ret < 0) {
 262		netdev_warn(dev->net, "Error writing MII_ADDR\n");
 263		goto done;
 264	}
 265
 266	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 267	if (ret < 0) {
 268		netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 269		goto done;
 270	}
 271
 272done:
 273	mutex_unlock(&dev->phy_mutex);
 274}
 275
 276static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 277				   int idx)
 278{
 279	return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 280}
 281
 282static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 283				     int idx, int regval)
 284{
 285	__smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 286}
 287
 288static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 289{
 290	return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 291}
 292
 293static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 294				int regval)
 295{
 296	__smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 297}
 298
 299static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 300{
 301	unsigned long start_time = jiffies;
 302	u32 val;
 303	int ret;
 304
 305	do {
 306		ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 307		if (ret < 0) {
 308			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 309			return ret;
 310		}
 311
 312		if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 313			break;
 314		udelay(40);
 315	} while (!time_after(jiffies, start_time + HZ));
 316
 317	if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 318		netdev_warn(dev->net, "EEPROM read operation timeout\n");
 319		return -EIO;
 320	}
 321
 322	return 0;
 323}
 324
 325static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 326{
 327	unsigned long start_time = jiffies;
 328	u32 val;
 329	int ret;
 330
 331	do {
 332		ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 333		if (ret < 0) {
 334			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 335			return ret;
 336		}
 337
 338		if (!(val & E2P_CMD_BUSY_))
 339			return 0;
 340
 341		udelay(40);
 342	} while (!time_after(jiffies, start_time + HZ));
 343
 344	netdev_warn(dev->net, "EEPROM is busy\n");
 345	return -EIO;
 346}
 347
 348static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 349				u8 *data)
 350{
 351	u32 val;
 352	int i, ret;
 353
 354	BUG_ON(!dev);
 355	BUG_ON(!data);
 356
 357	ret = smsc95xx_eeprom_confirm_not_busy(dev);
 358	if (ret)
 359		return ret;
 360
 361	for (i = 0; i < length; i++) {
 362		val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 363		ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 364		if (ret < 0) {
 365			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 366			return ret;
 367		}
 368
 369		ret = smsc95xx_wait_eeprom(dev);
 370		if (ret < 0)
 371			return ret;
 372
 373		ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 374		if (ret < 0) {
 375			netdev_warn(dev->net, "Error reading E2P_DATA\n");
 376			return ret;
 377		}
 378
 379		data[i] = val & 0xFF;
 380		offset++;
 381	}
 382
 383	return 0;
 384}
 385
 386static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 387				 u8 *data)
 388{
 389	u32 val;
 390	int i, ret;
 391
 392	BUG_ON(!dev);
 393	BUG_ON(!data);
 394
 395	ret = smsc95xx_eeprom_confirm_not_busy(dev);
 396	if (ret)
 397		return ret;
 398
 399	/* Issue write/erase enable command */
 400	val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 401	ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 402	if (ret < 0) {
 403		netdev_warn(dev->net, "Error writing E2P_DATA\n");
 404		return ret;
 405	}
 406
 407	ret = smsc95xx_wait_eeprom(dev);
 408	if (ret < 0)
 409		return ret;
 410
 411	for (i = 0; i < length; i++) {
 412
 413		/* Fill data register */
 414		val = data[i];
 415		ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 416		if (ret < 0) {
 417			netdev_warn(dev->net, "Error writing E2P_DATA\n");
 418			return ret;
 419		}
 420
 421		/* Send "write" command */
 422		val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 423		ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 424		if (ret < 0) {
 425			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 426			return ret;
 427		}
 428
 429		ret = smsc95xx_wait_eeprom(dev);
 430		if (ret < 0)
 431			return ret;
 432
 433		offset++;
 434	}
 435
 436	return 0;
 437}
 438
 439static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 440						 u32 data)
 441{
 442	const u16 size = 4;
 443	u32 buf;
 444	int ret;
 445
 446	buf = data;
 447	cpu_to_le32s(&buf);
 448
 449	ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 450				     USB_DIR_OUT | USB_TYPE_VENDOR |
 451				     USB_RECIP_DEVICE,
 452				     0, index, &buf, size);
 453	if (ret < 0)
 454		netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 455			    ret);
 456	return ret;
 457}
 458
 459/* returns hash bit number for given MAC address
 460 * example:
 461 * 01 00 5E 00 00 01 -> returns bit number 31 */
 462static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 463{
 464	return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 465}
 466
 467static void smsc95xx_set_multicast(struct net_device *netdev)
 468{
 469	struct usbnet *dev = netdev_priv(netdev);
 470	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 471	unsigned long flags;
 472	int ret;
 473
 474	pdata->hash_hi = 0;
 475	pdata->hash_lo = 0;
 476
 477	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 478
 479	if (dev->net->flags & IFF_PROMISC) {
 480		netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 481		pdata->mac_cr |= MAC_CR_PRMS_;
 482		pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 483	} else if (dev->net->flags & IFF_ALLMULTI) {
 484		netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 485		pdata->mac_cr |= MAC_CR_MCPAS_;
 486		pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 487	} else if (!netdev_mc_empty(dev->net)) {
 488		struct netdev_hw_addr *ha;
 489
 490		pdata->mac_cr |= MAC_CR_HPFILT_;
 491		pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 492
 493		netdev_for_each_mc_addr(ha, netdev) {
 494			u32 bitnum = smsc95xx_hash(ha->addr);
 495			u32 mask = 0x01 << (bitnum & 0x1F);
 496			if (bitnum & 0x20)
 497				pdata->hash_hi |= mask;
 498			else
 499				pdata->hash_lo |= mask;
 500		}
 501
 502		netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 503				   pdata->hash_hi, pdata->hash_lo);
 504	} else {
 505		netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 506		pdata->mac_cr &=
 507			~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 508	}
 509
 510	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 511
 512	/* Initiate async writes, as we can't wait for completion here */
 513	ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 514	if (ret < 0)
 515		netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 516
 517	ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 518	if (ret < 0)
 519		netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 520
 521	ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 522	if (ret < 0)
 523		netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 524}
 525
 526static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 527					   u16 lcladv, u16 rmtadv)
 528{
 529	u32 flow = 0, afc_cfg;
 530
 531	int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 532	if (ret < 0)
 533		return ret;
 534
 535	if (duplex == DUPLEX_FULL) {
 536		u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 537
 538		if (cap & FLOW_CTRL_RX)
 539			flow = 0xFFFF0002;
 540
 541		if (cap & FLOW_CTRL_TX) {
 542			afc_cfg |= 0xF;
 543			flow |= 0xFFFF0000;
 544		} else {
 545			afc_cfg &= ~0xF;
 546		}
 547
 548		netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 549				   cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 550				   cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 551	} else {
 552		netif_dbg(dev, link, dev->net, "half duplex\n");
 553		afc_cfg |= 0xF;
 554	}
 555
 556	ret = smsc95xx_write_reg(dev, FLOW, flow);
 557	if (ret < 0)
 558		return ret;
 559
 560	return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 561}
 562
 563static int smsc95xx_link_reset(struct usbnet *dev)
 564{
 565	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 566	struct mii_if_info *mii = &dev->mii;
 567	struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 568	unsigned long flags;
 569	u16 lcladv, rmtadv;
 570	int ret;
 571
 572	/* clear interrupt status */
 573	ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 574	if (ret < 0)
 575		return ret;
 576
 577	ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 578	if (ret < 0)
 579		return ret;
 580
 581	mii_check_media(mii, 1, 1);
 582	mii_ethtool_gset(&dev->mii, &ecmd);
 583	lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 584	rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 585
 586	netif_dbg(dev, link, dev->net,
 587		  "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 588		  ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 589
 590	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 591	if (ecmd.duplex != DUPLEX_FULL) {
 592		pdata->mac_cr &= ~MAC_CR_FDPX_;
 593		pdata->mac_cr |= MAC_CR_RCVOWN_;
 594	} else {
 595		pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 596		pdata->mac_cr |= MAC_CR_FDPX_;
 597	}
 598	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 599
 600	ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 601	if (ret < 0)
 602		return ret;
 603
 604	ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 605	if (ret < 0)
 606		netdev_warn(dev->net, "Error updating PHY flow control\n");
 607
 608	return ret;
 609}
 610
 611static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 612{
 613	u32 intdata;
 614
 615	if (urb->actual_length != 4) {
 616		netdev_warn(dev->net, "unexpected urb length %d\n",
 617			    urb->actual_length);
 618		return;
 619	}
 620
 621	memcpy(&intdata, urb->transfer_buffer, 4);
 622	le32_to_cpus(&intdata);
 623
 624	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 625
 626	if (intdata & INT_ENP_PHY_INT_)
 627		usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 628	else
 629		netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 630			    intdata);
 631}
 632
 633static void set_carrier(struct usbnet *dev, bool link)
 634{
 635	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 636
 637	if (pdata->link_ok == link)
 638		return;
 639
 640	pdata->link_ok = link;
 641
 642	if (link)
 643		usbnet_link_change(dev, 1, 0);
 644	else
 645		usbnet_link_change(dev, 0, 0);
 646}
 647
 648static void check_carrier(struct work_struct *work)
 649{
 650	struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
 651						carrier_check.work);
 652	struct usbnet *dev = pdata->dev;
 653	int ret;
 654
 655	if (pdata->suspend_flags != 0)
 656		return;
 657
 658	ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
 659	if (ret < 0) {
 660		netdev_warn(dev->net, "Failed to read MII_BMSR\n");
 661		return;
 662	}
 663	if (ret & BMSR_LSTATUS)
 664		set_carrier(dev, 1);
 665	else
 666		set_carrier(dev, 0);
 667
 668	schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
 669}
 670
 671/* Enable or disable Tx & Rx checksum offload engines */
 672static int smsc95xx_set_features(struct net_device *netdev,
 673	netdev_features_t features)
 674{
 675	struct usbnet *dev = netdev_priv(netdev);
 676	u32 read_buf;
 677	int ret;
 678
 679	ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 680	if (ret < 0)
 681		return ret;
 682
 683	if (features & NETIF_F_IP_CSUM)
 684		read_buf |= Tx_COE_EN_;
 685	else
 686		read_buf &= ~Tx_COE_EN_;
 687
 688	if (features & NETIF_F_RXCSUM)
 689		read_buf |= Rx_COE_EN_;
 690	else
 691		read_buf &= ~Rx_COE_EN_;
 692
 693	ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 694	if (ret < 0)
 695		return ret;
 696
 697	netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 698	return 0;
 699}
 700
 701static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 702{
 703	return MAX_EEPROM_SIZE;
 704}
 705
 706static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 707				       struct ethtool_eeprom *ee, u8 *data)
 708{
 709	struct usbnet *dev = netdev_priv(netdev);
 710
 711	ee->magic = LAN95XX_EEPROM_MAGIC;
 712
 713	return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 714}
 715
 716static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 717				       struct ethtool_eeprom *ee, u8 *data)
 718{
 719	struct usbnet *dev = netdev_priv(netdev);
 720
 721	if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 722		netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 723			    ee->magic);
 724		return -EINVAL;
 725	}
 726
 727	return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 728}
 729
 730static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 731{
 732	/* all smsc95xx registers */
 733	return COE_CR - ID_REV + sizeof(u32);
 734}
 735
 736static void
 737smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 738			 void *buf)
 739{
 740	struct usbnet *dev = netdev_priv(netdev);
 741	unsigned int i, j;
 742	int retval;
 743	u32 *data = buf;
 744
 745	retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 746	if (retval < 0) {
 747		netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 748		return;
 749	}
 750
 751	for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 752		retval = smsc95xx_read_reg(dev, i, &data[j]);
 753		if (retval < 0) {
 754			netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 755			return;
 756		}
 757	}
 758}
 759
 760static void smsc95xx_ethtool_get_wol(struct net_device *net,
 761				     struct ethtool_wolinfo *wolinfo)
 762{
 763	struct usbnet *dev = netdev_priv(net);
 764	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 765
 766	wolinfo->supported = SUPPORTED_WAKE;
 767	wolinfo->wolopts = pdata->wolopts;
 768}
 769
 770static int smsc95xx_ethtool_set_wol(struct net_device *net,
 771				    struct ethtool_wolinfo *wolinfo)
 772{
 773	struct usbnet *dev = netdev_priv(net);
 774	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 775	int ret;
 776
 
 
 
 777	pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 778
 779	ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 780	if (ret < 0)
 781		netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 782
 783	return ret;
 784}
 785
 786static int get_mdix_status(struct net_device *net)
 787{
 788	struct usbnet *dev = netdev_priv(net);
 789	u32 val;
 790	int buf;
 791
 792	buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
 793	if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
 794		if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
 795			return ETH_TP_MDI_AUTO;
 796		else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
 797			return ETH_TP_MDI_X;
 798	} else {
 799		buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
 800		if (val & STRAP_STATUS_AMDIX_EN_)
 801			return ETH_TP_MDI_AUTO;
 802	}
 803
 804	return ETH_TP_MDI;
 805}
 806
 807static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
 808{
 809	struct usbnet *dev = netdev_priv(net);
 810	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 811	int buf;
 812
 813	if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
 814	    (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
 815	    (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
 816	    (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
 817		/* Extend Manual AutoMDIX timer for 9500A/9500Ai */
 818		buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 819					 PHY_EDPD_CONFIG);
 820		buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
 821		smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 822				    PHY_EDPD_CONFIG, buf);
 823	}
 824
 825	if (mdix_ctrl == ETH_TP_MDI) {
 826		buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 827					 SPECIAL_CTRL_STS);
 828		buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 829		buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 830			 SPECIAL_CTRL_STS_AMDIX_STATE_);
 831		smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 832				    SPECIAL_CTRL_STS, buf);
 833	} else if (mdix_ctrl == ETH_TP_MDI_X) {
 834		buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 835					 SPECIAL_CTRL_STS);
 836		buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 837		buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 838			 SPECIAL_CTRL_STS_AMDIX_STATE_);
 839		buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
 840		smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 841				    SPECIAL_CTRL_STS, buf);
 842	} else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
 843		buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 844					 SPECIAL_CTRL_STS);
 845		buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 846		buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 847			 SPECIAL_CTRL_STS_AMDIX_STATE_);
 848		buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
 849		smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 850				    SPECIAL_CTRL_STS, buf);
 851	}
 852	pdata->mdix_ctrl = mdix_ctrl;
 853}
 854
 855static int smsc95xx_get_link_ksettings(struct net_device *net,
 856				       struct ethtool_link_ksettings *cmd)
 857{
 858	struct usbnet *dev = netdev_priv(net);
 859	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 860	int retval;
 861
 862	retval = usbnet_get_link_ksettings(net, cmd);
 863
 864	cmd->base.eth_tp_mdix = pdata->mdix_ctrl;
 865	cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl;
 866
 867	return retval;
 868}
 869
 870static int smsc95xx_set_link_ksettings(struct net_device *net,
 871				       const struct ethtool_link_ksettings *cmd)
 872{
 873	struct usbnet *dev = netdev_priv(net);
 874	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 875	int retval;
 876
 877	if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl)
 878		set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl);
 879
 880	retval = usbnet_set_link_ksettings(net, cmd);
 881
 882	return retval;
 883}
 884
 885static const struct ethtool_ops smsc95xx_ethtool_ops = {
 886	.get_link	= usbnet_get_link,
 887	.nway_reset	= usbnet_nway_reset,
 888	.get_drvinfo	= usbnet_get_drvinfo,
 889	.get_msglevel	= usbnet_get_msglevel,
 890	.set_msglevel	= usbnet_set_msglevel,
 891	.get_eeprom_len	= smsc95xx_ethtool_get_eeprom_len,
 892	.get_eeprom	= smsc95xx_ethtool_get_eeprom,
 893	.set_eeprom	= smsc95xx_ethtool_set_eeprom,
 894	.get_regs_len	= smsc95xx_ethtool_getregslen,
 895	.get_regs	= smsc95xx_ethtool_getregs,
 896	.get_wol	= smsc95xx_ethtool_get_wol,
 897	.set_wol	= smsc95xx_ethtool_set_wol,
 898	.get_link_ksettings	= smsc95xx_get_link_ksettings,
 899	.set_link_ksettings	= smsc95xx_set_link_ksettings,
 900	.get_ts_info	= ethtool_op_get_ts_info,
 901};
 902
 903static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 904{
 905	struct usbnet *dev = netdev_priv(netdev);
 906
 907	if (!netif_running(netdev))
 908		return -EINVAL;
 909
 910	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 911}
 912
 913static void smsc95xx_init_mac_address(struct usbnet *dev)
 914{
 915	const u8 *mac_addr;
 916
 917	/* maybe the boot loader passed the MAC address in devicetree */
 918	mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 919	if (mac_addr) {
 920		memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 921		return;
 922	}
 923
 924	/* try reading mac address from EEPROM */
 925	if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 926			dev->net->dev_addr) == 0) {
 927		if (is_valid_ether_addr(dev->net->dev_addr)) {
 928			/* eeprom values are valid so use them */
 929			netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 930			return;
 931		}
 932	}
 933
 934	/* no useful static MAC address found. generate a random one */
 935	eth_hw_addr_random(dev->net);
 936	netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 937}
 938
 939static int smsc95xx_set_mac_address(struct usbnet *dev)
 940{
 941	u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 942		dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 943	u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 944	int ret;
 945
 946	ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 947	if (ret < 0)
 948		return ret;
 949
 950	return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 951}
 952
 953/* starts the TX path */
 954static int smsc95xx_start_tx_path(struct usbnet *dev)
 955{
 956	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 957	unsigned long flags;
 958	int ret;
 959
 960	/* Enable Tx at MAC */
 961	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 962	pdata->mac_cr |= MAC_CR_TXEN_;
 963	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 964
 965	ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 966	if (ret < 0)
 967		return ret;
 968
 969	/* Enable Tx at SCSRs */
 970	return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 971}
 972
 973/* Starts the Receive path */
 974static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 975{
 976	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 977	unsigned long flags;
 978
 979	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 980	pdata->mac_cr |= MAC_CR_RXEN_;
 981	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 982
 983	return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 984}
 985
 986static int smsc95xx_phy_initialize(struct usbnet *dev)
 987{
 988	int bmcr, ret, timeout = 0;
 989
 990	/* Initialize MII structure */
 991	dev->mii.dev = dev->net;
 992	dev->mii.mdio_read = smsc95xx_mdio_read;
 993	dev->mii.mdio_write = smsc95xx_mdio_write;
 994	dev->mii.phy_id_mask = 0x1f;
 995	dev->mii.reg_num_mask = 0x1f;
 996	dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 997
 998	/* reset phy and wait for reset to complete */
 999	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1000
1001	do {
1002		msleep(10);
1003		bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
1004		timeout++;
1005	} while ((bmcr & BMCR_RESET) && (timeout < 100));
1006
1007	if (timeout >= 100) {
1008		netdev_warn(dev->net, "timeout on PHY Reset");
1009		return -EIO;
1010	}
1011
1012	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1013		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1014		ADVERTISE_PAUSE_ASYM);
1015
1016	/* read to clear */
1017	ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1018	if (ret < 0) {
1019		netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1020		return ret;
1021	}
1022
1023	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1024		PHY_INT_MASK_DEFAULT_);
1025	mii_nway_restart(&dev->mii);
1026
1027	netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1028	return 0;
1029}
1030
1031static int smsc95xx_reset(struct usbnet *dev)
1032{
1033	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1034	u32 read_buf, write_buf, burst_cap;
1035	int ret = 0, timeout;
1036
1037	netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1038
1039	ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1040	if (ret < 0)
1041		return ret;
1042
1043	timeout = 0;
1044	do {
1045		msleep(10);
1046		ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1047		if (ret < 0)
1048			return ret;
1049		timeout++;
1050	} while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1051
1052	if (timeout >= 100) {
1053		netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1054		return ret;
1055	}
1056
1057	ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1058	if (ret < 0)
1059		return ret;
1060
1061	timeout = 0;
1062	do {
1063		msleep(10);
1064		ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1065		if (ret < 0)
1066			return ret;
1067		timeout++;
1068	} while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1069
1070	if (timeout >= 100) {
1071		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1072		return ret;
1073	}
1074
1075	ret = smsc95xx_set_mac_address(dev);
1076	if (ret < 0)
1077		return ret;
1078
1079	netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1080		  dev->net->dev_addr);
1081
1082	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1083	if (ret < 0)
1084		return ret;
1085
1086	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1087		  read_buf);
1088
1089	read_buf |= HW_CFG_BIR_;
1090
1091	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1092	if (ret < 0)
1093		return ret;
1094
1095	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1096	if (ret < 0)
1097		return ret;
1098
1099	netif_dbg(dev, ifup, dev->net,
1100		  "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1101		  read_buf);
1102
1103	if (!turbo_mode) {
1104		burst_cap = 0;
1105		dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1106	} else if (dev->udev->speed == USB_SPEED_HIGH) {
1107		burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1108		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1109	} else {
1110		burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1111		dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1112	}
1113
1114	netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1115		  (ulong)dev->rx_urb_size);
1116
1117	ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1118	if (ret < 0)
1119		return ret;
1120
1121	ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1122	if (ret < 0)
1123		return ret;
1124
1125	netif_dbg(dev, ifup, dev->net,
1126		  "Read Value from BURST_CAP after writing: 0x%08x\n",
1127		  read_buf);
1128
1129	ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1130	if (ret < 0)
1131		return ret;
1132
1133	ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1134	if (ret < 0)
1135		return ret;
1136
1137	netif_dbg(dev, ifup, dev->net,
1138		  "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1139		  read_buf);
1140
1141	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1142	if (ret < 0)
1143		return ret;
1144
1145	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1146		  read_buf);
1147
1148	if (turbo_mode)
1149		read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1150
1151	read_buf &= ~HW_CFG_RXDOFF_;
1152
1153	/* set Rx data offset=2, Make IP header aligns on word boundary. */
1154	read_buf |= NET_IP_ALIGN << 9;
1155
1156	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1157	if (ret < 0)
1158		return ret;
1159
1160	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1161	if (ret < 0)
1162		return ret;
1163
1164	netif_dbg(dev, ifup, dev->net,
1165		  "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1166
1167	ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1168	if (ret < 0)
1169		return ret;
1170
1171	ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1172	if (ret < 0)
1173		return ret;
1174	netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1175
1176	/* Configure GPIO pins as LED outputs */
1177	write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1178		LED_GPIO_CFG_FDX_LED;
1179	ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1180	if (ret < 0)
1181		return ret;
1182
1183	/* Init Tx */
1184	ret = smsc95xx_write_reg(dev, FLOW, 0);
1185	if (ret < 0)
1186		return ret;
1187
1188	ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1189	if (ret < 0)
1190		return ret;
1191
1192	/* Don't need mac_cr_lock during initialisation */
1193	ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1194	if (ret < 0)
1195		return ret;
1196
1197	/* Init Rx */
1198	/* Set Vlan */
1199	ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1200	if (ret < 0)
1201		return ret;
1202
1203	/* Enable or disable checksum offload engines */
1204	ret = smsc95xx_set_features(dev->net, dev->net->features);
1205	if (ret < 0) {
1206		netdev_warn(dev->net, "Failed to set checksum offload features\n");
1207		return ret;
1208	}
1209
1210	smsc95xx_set_multicast(dev->net);
1211
1212	ret = smsc95xx_phy_initialize(dev);
1213	if (ret < 0) {
1214		netdev_warn(dev->net, "Failed to init PHY\n");
1215		return ret;
1216	}
1217
1218	ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1219	if (ret < 0)
1220		return ret;
1221
1222	/* enable PHY interrupts */
1223	read_buf |= INT_EP_CTL_PHY_INT_;
1224
1225	ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1226	if (ret < 0)
1227		return ret;
1228
1229	ret = smsc95xx_start_tx_path(dev);
1230	if (ret < 0) {
1231		netdev_warn(dev->net, "Failed to start TX path\n");
1232		return ret;
1233	}
1234
1235	ret = smsc95xx_start_rx_path(dev, 0);
1236	if (ret < 0) {
1237		netdev_warn(dev->net, "Failed to start RX path\n");
1238		return ret;
1239	}
1240
1241	netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1242	return 0;
1243}
1244
1245static const struct net_device_ops smsc95xx_netdev_ops = {
1246	.ndo_open		= usbnet_open,
1247	.ndo_stop		= usbnet_stop,
1248	.ndo_start_xmit		= usbnet_start_xmit,
1249	.ndo_tx_timeout		= usbnet_tx_timeout,
1250	.ndo_change_mtu		= usbnet_change_mtu,
1251	.ndo_get_stats64	= usbnet_get_stats64,
1252	.ndo_set_mac_address 	= eth_mac_addr,
1253	.ndo_validate_addr	= eth_validate_addr,
1254	.ndo_do_ioctl 		= smsc95xx_ioctl,
1255	.ndo_set_rx_mode	= smsc95xx_set_multicast,
1256	.ndo_set_features	= smsc95xx_set_features,
1257};
1258
1259static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1260{
1261	struct smsc95xx_priv *pdata = NULL;
1262	u32 val;
1263	int ret;
1264
1265	printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1266
1267	ret = usbnet_get_endpoints(dev, intf);
1268	if (ret < 0) {
1269		netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1270		return ret;
1271	}
1272
1273	dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1274					      GFP_KERNEL);
1275
1276	pdata = (struct smsc95xx_priv *)(dev->data[0]);
1277	if (!pdata)
1278		return -ENOMEM;
1279
1280	spin_lock_init(&pdata->mac_cr_lock);
1281
1282	/* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1283	 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1284	 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1285	 * it is transmitted as all ones. The zero transmitted checksum means
1286	 * transmitter generated no checksum. Hence, enable csum offload only
1287	 * for ipv4 packets.
1288	 */
1289	if (DEFAULT_TX_CSUM_ENABLE)
1290		dev->net->features |= NETIF_F_IP_CSUM;
1291	if (DEFAULT_RX_CSUM_ENABLE)
1292		dev->net->features |= NETIF_F_RXCSUM;
1293
1294	dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
 
1295
1296	smsc95xx_init_mac_address(dev);
1297
1298	/* Init all registers */
1299	ret = smsc95xx_reset(dev);
1300
1301	/* detect device revision as different features may be available */
1302	ret = smsc95xx_read_reg(dev, ID_REV, &val);
1303	if (ret < 0)
1304		return ret;
1305	val >>= 16;
1306	pdata->chip_id = val;
1307	pdata->mdix_ctrl = get_mdix_status(dev->net);
1308
1309	if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1310	    (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1311		pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1312			FEATURE_PHY_NLP_CROSSOVER |
1313			FEATURE_REMOTE_WAKEUP);
1314	else if (val == ID_REV_CHIP_ID_9512_)
1315		pdata->features = FEATURE_8_WAKEUP_FILTERS;
1316
1317	dev->net->netdev_ops = &smsc95xx_netdev_ops;
1318	dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1319	dev->net->flags |= IFF_MULTICAST;
1320	dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
 
 
1321	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1322
1323	pdata->dev = dev;
1324	INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1325	schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1326
1327	return 0;
1328}
1329
1330static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1331{
1332	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1333
1334	if (pdata) {
1335		cancel_delayed_work(&pdata->carrier_check);
1336		netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1337		kfree(pdata);
1338		pdata = NULL;
1339		dev->data[0] = 0;
1340	}
1341}
1342
1343static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1344{
1345	u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1346	return crc << ((filter % 2) * 16);
1347}
1348
1349static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1350{
1351	struct mii_if_info *mii = &dev->mii;
1352	int ret;
1353
1354	netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1355
1356	/* read to clear */
1357	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1358	if (ret < 0)
1359		return ret;
1360
1361	/* enable interrupt source */
1362	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1363	if (ret < 0)
1364		return ret;
1365
1366	ret |= mask;
1367
1368	smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1369
1370	return 0;
1371}
1372
1373static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1374{
1375	struct mii_if_info *mii = &dev->mii;
1376	int ret;
1377
1378	/* first, a dummy read, needed to latch some MII phys */
1379	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1380	if (ret < 0)
1381		return ret;
1382
1383	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1384	if (ret < 0)
1385		return ret;
1386
1387	return !!(ret & BMSR_LSTATUS);
1388}
1389
1390static int smsc95xx_enter_suspend0(struct usbnet *dev)
1391{
1392	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1393	u32 val;
1394	int ret;
1395
1396	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1397	if (ret < 0)
1398		return ret;
1399
1400	val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1401	val |= PM_CTL_SUS_MODE_0;
1402
1403	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1404	if (ret < 0)
1405		return ret;
1406
1407	/* clear wol status */
1408	val &= ~PM_CTL_WUPS_;
1409	val |= PM_CTL_WUPS_WOL_;
1410
1411	/* enable energy detection */
1412	if (pdata->wolopts & WAKE_PHY)
1413		val |= PM_CTL_WUPS_ED_;
1414
1415	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1416	if (ret < 0)
1417		return ret;
1418
1419	/* read back PM_CTRL */
1420	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1421	if (ret < 0)
1422		return ret;
1423
1424	pdata->suspend_flags |= SUSPEND_SUSPEND0;
1425
1426	return 0;
1427}
1428
1429static int smsc95xx_enter_suspend1(struct usbnet *dev)
1430{
1431	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1432	struct mii_if_info *mii = &dev->mii;
1433	u32 val;
1434	int ret;
1435
1436	/* reconfigure link pulse detection timing for
1437	 * compatibility with non-standard link partners
1438	 */
1439	if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1440		smsc95xx_mdio_write_nopm(dev->net, mii->phy_id,	PHY_EDPD_CONFIG,
1441			PHY_EDPD_CONFIG_DEFAULT);
1442
1443	/* enable energy detect power-down mode */
1444	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1445	if (ret < 0)
1446		return ret;
1447
1448	ret |= MODE_CTRL_STS_EDPWRDOWN_;
1449
1450	smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1451
1452	/* enter SUSPEND1 mode */
1453	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1454	if (ret < 0)
1455		return ret;
1456
1457	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1458	val |= PM_CTL_SUS_MODE_1;
1459
1460	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1461	if (ret < 0)
1462		return ret;
1463
1464	/* clear wol status, enable energy detection */
1465	val &= ~PM_CTL_WUPS_;
1466	val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1467
1468	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1469	if (ret < 0)
1470		return ret;
1471
1472	pdata->suspend_flags |= SUSPEND_SUSPEND1;
1473
1474	return 0;
1475}
1476
1477static int smsc95xx_enter_suspend2(struct usbnet *dev)
1478{
1479	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1480	u32 val;
1481	int ret;
1482
1483	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1484	if (ret < 0)
1485		return ret;
1486
1487	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1488	val |= PM_CTL_SUS_MODE_2;
1489
1490	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1491	if (ret < 0)
1492		return ret;
1493
1494	pdata->suspend_flags |= SUSPEND_SUSPEND2;
1495
1496	return 0;
1497}
1498
1499static int smsc95xx_enter_suspend3(struct usbnet *dev)
1500{
1501	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1502	u32 val;
1503	int ret;
1504
1505	ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1506	if (ret < 0)
1507		return ret;
1508
1509	if (val & RX_FIFO_INF_USED_) {
1510		netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1511		return -EBUSY;
1512	}
1513
1514	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1515	if (ret < 0)
1516		return ret;
1517
1518	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1519	val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1520
1521	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1522	if (ret < 0)
1523		return ret;
1524
1525	/* clear wol status */
1526	val &= ~PM_CTL_WUPS_;
1527	val |= PM_CTL_WUPS_WOL_;
1528
1529	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1530	if (ret < 0)
1531		return ret;
1532
1533	pdata->suspend_flags |= SUSPEND_SUSPEND3;
1534
1535	return 0;
1536}
1537
1538static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1539{
1540	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1541	int ret;
1542
1543	if (!netif_running(dev->net)) {
1544		/* interface is ifconfig down so fully power down hw */
1545		netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1546		return smsc95xx_enter_suspend2(dev);
1547	}
1548
1549	if (!link_up) {
1550		/* link is down so enter EDPD mode, but only if device can
1551		 * reliably resume from it.  This check should be redundant
1552		 * as current FEATURE_REMOTE_WAKEUP parts also support
1553		 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1554		if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1555			netdev_warn(dev->net, "EDPD not supported\n");
1556			return -EBUSY;
1557		}
1558
1559		netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1560
1561		/* enable PHY wakeup events for if cable is attached */
1562		ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1563			PHY_INT_MASK_ANEG_COMP_);
1564		if (ret < 0) {
1565			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1566			return ret;
1567		}
1568
1569		netdev_info(dev->net, "entering SUSPEND1 mode\n");
1570		return smsc95xx_enter_suspend1(dev);
1571	}
1572
1573	/* enable PHY wakeup events so we remote wakeup if cable is pulled */
1574	ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1575		PHY_INT_MASK_LINK_DOWN_);
1576	if (ret < 0) {
1577		netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1578		return ret;
1579	}
1580
1581	netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1582	return smsc95xx_enter_suspend3(dev);
1583}
1584
1585static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1586{
1587	struct usbnet *dev = usb_get_intfdata(intf);
1588	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1589	u32 val, link_up;
1590	int ret;
1591
1592	ret = usbnet_suspend(intf, message);
1593	if (ret < 0) {
1594		netdev_warn(dev->net, "usbnet_suspend error\n");
1595		return ret;
1596	}
1597
 
 
1598	if (pdata->suspend_flags) {
1599		netdev_warn(dev->net, "error during last resume\n");
1600		pdata->suspend_flags = 0;
1601	}
1602
1603	/* determine if link is up using only _nopm functions */
1604	link_up = smsc95xx_link_ok_nopm(dev);
1605
1606	if (message.event == PM_EVENT_AUTO_SUSPEND &&
1607	    (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1608		ret = smsc95xx_autosuspend(dev, link_up);
1609		goto done;
1610	}
1611
1612	/* if we get this far we're not autosuspending */
1613	/* if no wol options set, or if link is down and we're not waking on
1614	 * PHY activity, enter lowest power SUSPEND2 mode
1615	 */
1616	if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1617		!(link_up || (pdata->wolopts & WAKE_PHY))) {
1618		netdev_info(dev->net, "entering SUSPEND2 mode\n");
1619
1620		/* disable energy detect (link up) & wake up events */
1621		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1622		if (ret < 0)
1623			goto done;
1624
1625		val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1626
1627		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1628		if (ret < 0)
1629			goto done;
1630
1631		ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1632		if (ret < 0)
1633			goto done;
1634
1635		val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1636
1637		ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1638		if (ret < 0)
1639			goto done;
1640
1641		ret = smsc95xx_enter_suspend2(dev);
1642		goto done;
1643	}
1644
1645	if (pdata->wolopts & WAKE_PHY) {
1646		ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1647			(PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1648		if (ret < 0) {
1649			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1650			goto done;
1651		}
1652
1653		/* if link is down then configure EDPD and enter SUSPEND1,
1654		 * otherwise enter SUSPEND0 below
1655		 */
1656		if (!link_up) {
1657			netdev_info(dev->net, "entering SUSPEND1 mode\n");
1658			ret = smsc95xx_enter_suspend1(dev);
1659			goto done;
1660		}
1661	}
1662
1663	if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1664		u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1665		u32 command[2];
1666		u32 offset[2];
1667		u32 crc[4];
1668		int wuff_filter_count =
1669			(pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1670			LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1671		int i, filter = 0;
1672
1673		if (!filter_mask) {
1674			netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1675			ret = -ENOMEM;
1676			goto done;
1677		}
1678
1679		memset(command, 0, sizeof(command));
1680		memset(offset, 0, sizeof(offset));
1681		memset(crc, 0, sizeof(crc));
1682
1683		if (pdata->wolopts & WAKE_BCAST) {
1684			const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1685			netdev_info(dev->net, "enabling broadcast detection\n");
1686			filter_mask[filter * 4] = 0x003F;
1687			filter_mask[filter * 4 + 1] = 0x00;
1688			filter_mask[filter * 4 + 2] = 0x00;
1689			filter_mask[filter * 4 + 3] = 0x00;
1690			command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1691			offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1692			crc[filter/2] |= smsc_crc(bcast, 6, filter);
1693			filter++;
1694		}
1695
1696		if (pdata->wolopts & WAKE_MCAST) {
1697			const u8 mcast[] = {0x01, 0x00, 0x5E};
1698			netdev_info(dev->net, "enabling multicast detection\n");
1699			filter_mask[filter * 4] = 0x0007;
1700			filter_mask[filter * 4 + 1] = 0x00;
1701			filter_mask[filter * 4 + 2] = 0x00;
1702			filter_mask[filter * 4 + 3] = 0x00;
1703			command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1704			offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1705			crc[filter/2] |= smsc_crc(mcast, 3, filter);
1706			filter++;
1707		}
1708
1709		if (pdata->wolopts & WAKE_ARP) {
1710			const u8 arp[] = {0x08, 0x06};
1711			netdev_info(dev->net, "enabling ARP detection\n");
1712			filter_mask[filter * 4] = 0x0003;
1713			filter_mask[filter * 4 + 1] = 0x00;
1714			filter_mask[filter * 4 + 2] = 0x00;
1715			filter_mask[filter * 4 + 3] = 0x00;
1716			command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1717			offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1718			crc[filter/2] |= smsc_crc(arp, 2, filter);
1719			filter++;
1720		}
1721
1722		if (pdata->wolopts & WAKE_UCAST) {
1723			netdev_info(dev->net, "enabling unicast detection\n");
1724			filter_mask[filter * 4] = 0x003F;
1725			filter_mask[filter * 4 + 1] = 0x00;
1726			filter_mask[filter * 4 + 2] = 0x00;
1727			filter_mask[filter * 4 + 3] = 0x00;
1728			command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1729			offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1730			crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1731			filter++;
1732		}
1733
1734		for (i = 0; i < (wuff_filter_count * 4); i++) {
1735			ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1736			if (ret < 0) {
1737				kfree(filter_mask);
1738				goto done;
1739			}
1740		}
1741		kfree(filter_mask);
1742
1743		for (i = 0; i < (wuff_filter_count / 4); i++) {
1744			ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1745			if (ret < 0)
1746				goto done;
1747		}
1748
1749		for (i = 0; i < (wuff_filter_count / 4); i++) {
1750			ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1751			if (ret < 0)
1752				goto done;
1753		}
1754
1755		for (i = 0; i < (wuff_filter_count / 2); i++) {
1756			ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1757			if (ret < 0)
1758				goto done;
1759		}
1760
1761		/* clear any pending pattern match packet status */
1762		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1763		if (ret < 0)
1764			goto done;
1765
1766		val |= WUCSR_WUFR_;
1767
1768		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1769		if (ret < 0)
1770			goto done;
1771	}
1772
1773	if (pdata->wolopts & WAKE_MAGIC) {
1774		/* clear any pending magic packet status */
1775		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1776		if (ret < 0)
1777			goto done;
1778
1779		val |= WUCSR_MPR_;
1780
1781		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1782		if (ret < 0)
1783			goto done;
1784	}
1785
1786	/* enable/disable wakeup sources */
1787	ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1788	if (ret < 0)
1789		goto done;
1790
1791	if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1792		netdev_info(dev->net, "enabling pattern match wakeup\n");
1793		val |= WUCSR_WAKE_EN_;
1794	} else {
1795		netdev_info(dev->net, "disabling pattern match wakeup\n");
1796		val &= ~WUCSR_WAKE_EN_;
1797	}
1798
1799	if (pdata->wolopts & WAKE_MAGIC) {
1800		netdev_info(dev->net, "enabling magic packet wakeup\n");
1801		val |= WUCSR_MPEN_;
1802	} else {
1803		netdev_info(dev->net, "disabling magic packet wakeup\n");
1804		val &= ~WUCSR_MPEN_;
1805	}
1806
1807	ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1808	if (ret < 0)
1809		goto done;
1810
1811	/* enable wol wakeup source */
1812	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1813	if (ret < 0)
1814		goto done;
1815
1816	val |= PM_CTL_WOL_EN_;
1817
1818	/* phy energy detect wakeup source */
1819	if (pdata->wolopts & WAKE_PHY)
1820		val |= PM_CTL_ED_EN_;
1821
1822	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1823	if (ret < 0)
1824		goto done;
1825
1826	/* enable receiver to enable frame reception */
1827	smsc95xx_start_rx_path(dev, 1);
1828
1829	/* some wol options are enabled, so enter SUSPEND0 */
1830	netdev_info(dev->net, "entering SUSPEND0 mode\n");
1831	ret = smsc95xx_enter_suspend0(dev);
1832
1833done:
1834	/*
1835	 * TODO: resume() might need to handle the suspend failure
1836	 * in system sleep
1837	 */
1838	if (ret && PMSG_IS_AUTO(message))
1839		usbnet_resume(intf);
 
 
 
 
 
1840	return ret;
1841}
1842
1843static int smsc95xx_resume(struct usb_interface *intf)
1844{
1845	struct usbnet *dev = usb_get_intfdata(intf);
1846	struct smsc95xx_priv *pdata;
1847	u8 suspend_flags;
1848	int ret;
1849	u32 val;
1850
1851	BUG_ON(!dev);
1852	pdata = (struct smsc95xx_priv *)(dev->data[0]);
1853	suspend_flags = pdata->suspend_flags;
1854
1855	netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1856
1857	/* do this first to ensure it's cleared even in error case */
1858	pdata->suspend_flags = 0;
1859	schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1860
1861	if (suspend_flags & SUSPEND_ALLMODES) {
1862		/* clear wake-up sources */
1863		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1864		if (ret < 0)
1865			return ret;
1866
1867		val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1868
1869		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1870		if (ret < 0)
1871			return ret;
1872
1873		/* clear wake-up status */
1874		ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1875		if (ret < 0)
1876			return ret;
1877
1878		val &= ~PM_CTL_WOL_EN_;
1879		val |= PM_CTL_WUPS_;
1880
1881		ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1882		if (ret < 0)
1883			return ret;
1884	}
1885
1886	ret = usbnet_resume(intf);
1887	if (ret < 0)
1888		netdev_warn(dev->net, "usbnet_resume error\n");
1889
1890	return ret;
1891}
1892
1893static int smsc95xx_reset_resume(struct usb_interface *intf)
1894{
1895	struct usbnet *dev = usb_get_intfdata(intf);
1896	int ret;
1897
1898	ret = smsc95xx_reset(dev);
1899	if (ret < 0)
1900		return ret;
1901
1902	return smsc95xx_resume(intf);
1903}
1904
1905static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1906{
1907	skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1908	skb->ip_summed = CHECKSUM_COMPLETE;
1909	skb_trim(skb, skb->len - 2);
1910}
1911
1912static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1913{
1914	/* This check is no longer done by usbnet */
1915	if (skb->len < dev->net->hard_header_len)
1916		return 0;
1917
1918	while (skb->len > 0) {
1919		u32 header, align_count;
1920		struct sk_buff *ax_skb;
1921		unsigned char *packet;
1922		u16 size;
1923
1924		memcpy(&header, skb->data, sizeof(header));
1925		le32_to_cpus(&header);
1926		skb_pull(skb, 4 + NET_IP_ALIGN);
1927		packet = skb->data;
1928
1929		/* get the packet length */
1930		size = (u16)((header & RX_STS_FL_) >> 16);
1931		align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1932
1933		if (unlikely(header & RX_STS_ES_)) {
1934			netif_dbg(dev, rx_err, dev->net,
1935				  "Error header=0x%08x\n", header);
1936			dev->net->stats.rx_errors++;
1937			dev->net->stats.rx_dropped++;
1938
1939			if (header & RX_STS_CRC_) {
1940				dev->net->stats.rx_crc_errors++;
1941			} else {
1942				if (header & (RX_STS_TL_ | RX_STS_RF_))
1943					dev->net->stats.rx_frame_errors++;
1944
1945				if ((header & RX_STS_LE_) &&
1946					(!(header & RX_STS_FT_)))
1947					dev->net->stats.rx_length_errors++;
1948			}
1949		} else {
1950			/* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1951			if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1952				netif_dbg(dev, rx_err, dev->net,
1953					  "size err header=0x%08x\n", header);
1954				return 0;
1955			}
1956
1957			/* last frame in this batch */
1958			if (skb->len == size) {
1959				if (dev->net->features & NETIF_F_RXCSUM)
1960					smsc95xx_rx_csum_offload(skb);
1961				skb_trim(skb, skb->len - 4); /* remove fcs */
1962				skb->truesize = size + sizeof(struct sk_buff);
1963
1964				return 1;
1965			}
1966
1967			ax_skb = skb_clone(skb, GFP_ATOMIC);
1968			if (unlikely(!ax_skb)) {
1969				netdev_warn(dev->net, "Error allocating skb\n");
1970				return 0;
1971			}
1972
1973			ax_skb->len = size;
1974			ax_skb->data = packet;
1975			skb_set_tail_pointer(ax_skb, size);
1976
1977			if (dev->net->features & NETIF_F_RXCSUM)
1978				smsc95xx_rx_csum_offload(ax_skb);
1979			skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1980			ax_skb->truesize = size + sizeof(struct sk_buff);
1981
1982			usbnet_skb_return(dev, ax_skb);
1983		}
1984
1985		skb_pull(skb, size);
1986
1987		/* padding bytes before the next frame starts */
1988		if (skb->len)
1989			skb_pull(skb, align_count);
1990	}
1991
1992	return 1;
1993}
1994
1995static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1996{
1997	u16 low_16 = (u16)skb_checksum_start_offset(skb);
1998	u16 high_16 = low_16 + skb->csum_offset;
1999	return (high_16 << 16) | low_16;
2000}
2001
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2002static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
2003					 struct sk_buff *skb, gfp_t flags)
2004{
2005	bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2006	int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2007	u32 tx_cmd_a, tx_cmd_b;
 
2008
2009	/* We do not advertise SG, so skbs should be already linearized */
2010	BUG_ON(skb_shinfo(skb)->nr_frags);
2011
2012	/* Make writable and expand header space by overhead if required */
2013	if (skb_cow_head(skb, overhead)) {
2014		/* Must deallocate here as returning NULL to indicate error
2015		 * means the skb won't be deallocated in the caller.
2016		 */
2017		dev_kfree_skb_any(skb);
2018		return NULL;
2019	}
2020
 
 
 
2021	if (csum) {
2022		if (skb->len <= 45) {
2023			/* workaround - hardware tx checksum does not work
2024			 * properly with extremely small packets */
2025			long csstart = skb_checksum_start_offset(skb);
2026			__wsum calc = csum_partial(skb->data + csstart,
2027				skb->len - csstart, 0);
2028			*((__sum16 *)(skb->data + csstart
2029				+ skb->csum_offset)) = csum_fold(calc);
2030
2031			csum = false;
2032		} else {
2033			u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2034			skb_push(skb, 4);
2035			cpu_to_le32s(&csum_preamble);
2036			memcpy(skb->data, &csum_preamble, 4);
 
 
 
2037		}
2038	}
2039
2040	skb_push(skb, 4);
2041	tx_cmd_b = (u32)(skb->len - 4);
2042	if (csum)
2043		tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2044	cpu_to_le32s(&tx_cmd_b);
2045	memcpy(skb->data, &tx_cmd_b, 4);
2046
2047	skb_push(skb, 4);
2048	tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2049		TX_CMD_A_LAST_SEG_;
2050	cpu_to_le32s(&tx_cmd_a);
2051	memcpy(skb->data, &tx_cmd_a, 4);
2052
2053	return skb;
2054}
2055
2056static int smsc95xx_manage_power(struct usbnet *dev, int on)
2057{
2058	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2059
2060	dev->intf->needs_remote_wakeup = on;
2061
2062	if (pdata->features & FEATURE_REMOTE_WAKEUP)
2063		return 0;
2064
2065	/* this chip revision isn't capable of remote wakeup */
2066	netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2067
2068	if (on)
2069		usb_autopm_get_interface_no_resume(dev->intf);
2070	else
2071		usb_autopm_put_interface(dev->intf);
2072
2073	return 0;
2074}
2075
2076static const struct driver_info smsc95xx_info = {
2077	.description	= "smsc95xx USB 2.0 Ethernet",
2078	.bind		= smsc95xx_bind,
2079	.unbind		= smsc95xx_unbind,
2080	.link_reset	= smsc95xx_link_reset,
2081	.reset		= smsc95xx_reset,
2082	.rx_fixup	= smsc95xx_rx_fixup,
2083	.tx_fixup	= smsc95xx_tx_fixup,
2084	.status		= smsc95xx_status,
2085	.manage_power	= smsc95xx_manage_power,
2086	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2087};
2088
2089static const struct usb_device_id products[] = {
2090	{
2091		/* SMSC9500 USB Ethernet Device */
2092		USB_DEVICE(0x0424, 0x9500),
2093		.driver_info = (unsigned long) &smsc95xx_info,
2094	},
2095	{
2096		/* SMSC9505 USB Ethernet Device */
2097		USB_DEVICE(0x0424, 0x9505),
2098		.driver_info = (unsigned long) &smsc95xx_info,
2099	},
2100	{
2101		/* SMSC9500A USB Ethernet Device */
2102		USB_DEVICE(0x0424, 0x9E00),
2103		.driver_info = (unsigned long) &smsc95xx_info,
2104	},
2105	{
2106		/* SMSC9505A USB Ethernet Device */
2107		USB_DEVICE(0x0424, 0x9E01),
2108		.driver_info = (unsigned long) &smsc95xx_info,
2109	},
2110	{
2111		/* SMSC9512/9514 USB Hub & Ethernet Device */
2112		USB_DEVICE(0x0424, 0xec00),
2113		.driver_info = (unsigned long) &smsc95xx_info,
2114	},
2115	{
2116		/* SMSC9500 USB Ethernet Device (SAL10) */
2117		USB_DEVICE(0x0424, 0x9900),
2118		.driver_info = (unsigned long) &smsc95xx_info,
2119	},
2120	{
2121		/* SMSC9505 USB Ethernet Device (SAL10) */
2122		USB_DEVICE(0x0424, 0x9901),
2123		.driver_info = (unsigned long) &smsc95xx_info,
2124	},
2125	{
2126		/* SMSC9500A USB Ethernet Device (SAL10) */
2127		USB_DEVICE(0x0424, 0x9902),
2128		.driver_info = (unsigned long) &smsc95xx_info,
2129	},
2130	{
2131		/* SMSC9505A USB Ethernet Device (SAL10) */
2132		USB_DEVICE(0x0424, 0x9903),
2133		.driver_info = (unsigned long) &smsc95xx_info,
2134	},
2135	{
2136		/* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2137		USB_DEVICE(0x0424, 0x9904),
2138		.driver_info = (unsigned long) &smsc95xx_info,
2139	},
2140	{
2141		/* SMSC9500A USB Ethernet Device (HAL) */
2142		USB_DEVICE(0x0424, 0x9905),
2143		.driver_info = (unsigned long) &smsc95xx_info,
2144	},
2145	{
2146		/* SMSC9505A USB Ethernet Device (HAL) */
2147		USB_DEVICE(0x0424, 0x9906),
2148		.driver_info = (unsigned long) &smsc95xx_info,
2149	},
2150	{
2151		/* SMSC9500 USB Ethernet Device (Alternate ID) */
2152		USB_DEVICE(0x0424, 0x9907),
2153		.driver_info = (unsigned long) &smsc95xx_info,
2154	},
2155	{
2156		/* SMSC9500A USB Ethernet Device (Alternate ID) */
2157		USB_DEVICE(0x0424, 0x9908),
2158		.driver_info = (unsigned long) &smsc95xx_info,
2159	},
2160	{
2161		/* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2162		USB_DEVICE(0x0424, 0x9909),
2163		.driver_info = (unsigned long) &smsc95xx_info,
2164	},
2165	{
2166		/* SMSC LAN9530 USB Ethernet Device */
2167		USB_DEVICE(0x0424, 0x9530),
2168		.driver_info = (unsigned long) &smsc95xx_info,
2169	},
2170	{
2171		/* SMSC LAN9730 USB Ethernet Device */
2172		USB_DEVICE(0x0424, 0x9730),
2173		.driver_info = (unsigned long) &smsc95xx_info,
2174	},
2175	{
2176		/* SMSC LAN89530 USB Ethernet Device */
2177		USB_DEVICE(0x0424, 0x9E08),
2178		.driver_info = (unsigned long) &smsc95xx_info,
2179	},
2180	{ },		/* END */
2181};
2182MODULE_DEVICE_TABLE(usb, products);
2183
2184static struct usb_driver smsc95xx_driver = {
2185	.name		= "smsc95xx",
2186	.id_table	= products,
2187	.probe		= usbnet_probe,
2188	.suspend	= smsc95xx_suspend,
2189	.resume		= smsc95xx_resume,
2190	.reset_resume	= smsc95xx_reset_resume,
2191	.disconnect	= usbnet_disconnect,
2192	.disable_hub_initiated_lpm = 1,
2193	.supports_autosuspend = 1,
2194};
2195
2196module_usb_driver(smsc95xx_driver);
2197
2198MODULE_AUTHOR("Nancy Lin");
2199MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2200MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2201MODULE_LICENSE("GPL");