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 "smsc95xx.h"
  33
  34#define SMSC_CHIPNAME			"smsc95xx"
  35#define SMSC_DRIVER_VERSION		"1.0.4"
  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		(2048)
  42#define LAN95XX_EEPROM_MAGIC		(0x9500)
  43#define EEPROM_MAC_OFFSET		(0x01)
  44#define DEFAULT_TX_CSUM_ENABLE		(true)
  45#define DEFAULT_RX_CSUM_ENABLE		(true)
  46#define SMSC95XX_INTERNAL_PHY_ID	(1)
  47#define SMSC95XX_TX_OVERHEAD		(8)
  48#define SMSC95XX_TX_OVERHEAD_CSUM	(12)
  49#define SUPPORTED_WAKE			(WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  50					 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  51
  52#define FEATURE_8_WAKEUP_FILTERS	(0x01)
  53#define FEATURE_PHY_NLP_CROSSOVER	(0x02)
  54#define FEATURE_REMOTE_WAKEUP		(0x04)
  55
  56#define SUSPEND_SUSPEND0		(0x01)
  57#define SUSPEND_SUSPEND1		(0x02)
  58#define SUSPEND_SUSPEND2		(0x04)
  59#define SUSPEND_SUSPEND3		(0x08)
  60#define SUSPEND_ALLMODES		(SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  61					 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  62
 
 
  63struct smsc95xx_priv {
 
  64	u32 mac_cr;
  65	u32 hash_hi;
  66	u32 hash_lo;
  67	u32 wolopts;
  68	spinlock_t mac_cr_lock;
  69	u8 features;
  70	u8 suspend_flags;
 
 
 
 
  71};
  72
  73static bool turbo_mode = true;
  74module_param(turbo_mode, bool, 0644);
  75MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  76
  77static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  78					    u32 *data, int in_pm)
  79{
  80	u32 buf;
  81	int ret;
  82	int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  83
  84	BUG_ON(!dev);
  85
  86	if (!in_pm)
  87		fn = usbnet_read_cmd;
  88	else
  89		fn = usbnet_read_cmd_nopm;
  90
  91	ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  92		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  93		 0, index, &buf, 4);
  94	if (unlikely(ret < 0))
  95		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  96			    index, ret);
 
 
  97
  98	le32_to_cpus(&buf);
  99	*data = buf;
 100
 101	return ret;
 102}
 103
 104static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 105					     u32 data, int in_pm)
 106{
 107	u32 buf;
 108	int ret;
 109	int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 110
 111	BUG_ON(!dev);
 112
 113	if (!in_pm)
 114		fn = usbnet_write_cmd;
 115	else
 116		fn = usbnet_write_cmd_nopm;
 117
 118	buf = data;
 119	cpu_to_le32s(&buf);
 120
 121	ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 122		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 123		 0, index, &buf, 4);
 124	if (unlikely(ret < 0))
 125		netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 126			    index, ret);
 127
 128	return ret;
 129}
 130
 131static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 132					       u32 *data)
 133{
 134	return __smsc95xx_read_reg(dev, index, data, 1);
 135}
 136
 137static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 138						u32 data)
 139{
 140	return __smsc95xx_write_reg(dev, index, data, 1);
 141}
 142
 143static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 144					  u32 *data)
 145{
 146	return __smsc95xx_read_reg(dev, index, data, 0);
 147}
 148
 149static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 150					   u32 data)
 151{
 152	return __smsc95xx_write_reg(dev, index, data, 0);
 153}
 154
 155/* Loop until the read is completed with timeout
 156 * called with phy_mutex held */
 157static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 158						     int in_pm)
 159{
 160	unsigned long start_time = jiffies;
 161	u32 val;
 162	int ret;
 163
 164	do {
 165		ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 166		if (ret < 0) {
 167			netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 168			return ret;
 169		}
 170
 171		if (!(val & MII_BUSY_))
 172			return 0;
 173	} while (!time_after(jiffies, start_time + HZ));
 174
 175	return -EIO;
 176}
 177
 178static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 179				int in_pm)
 180{
 181	struct usbnet *dev = netdev_priv(netdev);
 182	u32 val, addr;
 183	int ret;
 184
 185	mutex_lock(&dev->phy_mutex);
 186
 187	/* confirm MII not busy */
 188	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 189	if (ret < 0) {
 190		netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 191		goto done;
 192	}
 193
 194	/* set the address, index & direction (read from PHY) */
 195	phy_id &= dev->mii.phy_id_mask;
 196	idx &= dev->mii.reg_num_mask;
 197	addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 198	ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 199	if (ret < 0) {
 200		netdev_warn(dev->net, "Error writing MII_ADDR\n");
 201		goto done;
 202	}
 203
 204	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 205	if (ret < 0) {
 206		netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 207		goto done;
 208	}
 209
 210	ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 211	if (ret < 0) {
 212		netdev_warn(dev->net, "Error reading MII_DATA\n");
 213		goto done;
 214	}
 215
 216	ret = (u16)(val & 0xFFFF);
 217
 218done:
 219	mutex_unlock(&dev->phy_mutex);
 220	return ret;
 221}
 222
 223static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 224				  int idx, int regval, int in_pm)
 225{
 226	struct usbnet *dev = netdev_priv(netdev);
 227	u32 val, addr;
 228	int ret;
 229
 230	mutex_lock(&dev->phy_mutex);
 231
 232	/* confirm MII not busy */
 233	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 234	if (ret < 0) {
 235		netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 236		goto done;
 237	}
 238
 239	val = regval;
 240	ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 241	if (ret < 0) {
 242		netdev_warn(dev->net, "Error writing MII_DATA\n");
 243		goto done;
 244	}
 245
 246	/* set the address, index & direction (write to PHY) */
 247	phy_id &= dev->mii.phy_id_mask;
 248	idx &= dev->mii.reg_num_mask;
 249	addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 250	ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 251	if (ret < 0) {
 252		netdev_warn(dev->net, "Error writing MII_ADDR\n");
 253		goto done;
 254	}
 255
 256	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 257	if (ret < 0) {
 258		netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 259		goto done;
 260	}
 261
 262done:
 263	mutex_unlock(&dev->phy_mutex);
 264}
 265
 266static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 267				   int idx)
 268{
 269	return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 270}
 271
 272static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 273				     int idx, int regval)
 274{
 275	__smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 276}
 277
 278static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 279{
 280	return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 281}
 282
 283static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 284				int regval)
 285{
 286	__smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 287}
 288
 289static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 290{
 291	unsigned long start_time = jiffies;
 292	u32 val;
 293	int ret;
 294
 295	do {
 296		ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 297		if (ret < 0) {
 298			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 299			return ret;
 300		}
 301
 302		if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 303			break;
 304		udelay(40);
 305	} while (!time_after(jiffies, start_time + HZ));
 306
 307	if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 308		netdev_warn(dev->net, "EEPROM read operation timeout\n");
 309		return -EIO;
 310	}
 311
 312	return 0;
 313}
 314
 315static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 316{
 317	unsigned long start_time = jiffies;
 318	u32 val;
 319	int ret;
 320
 321	do {
 322		ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 323		if (ret < 0) {
 324			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 325			return ret;
 326		}
 327
 328		if (!(val & E2P_CMD_BUSY_))
 329			return 0;
 330
 331		udelay(40);
 332	} while (!time_after(jiffies, start_time + HZ));
 333
 334	netdev_warn(dev->net, "EEPROM is busy\n");
 335	return -EIO;
 336}
 337
 338static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 339				u8 *data)
 340{
 341	u32 val;
 342	int i, ret;
 343
 344	BUG_ON(!dev);
 345	BUG_ON(!data);
 346
 347	ret = smsc95xx_eeprom_confirm_not_busy(dev);
 348	if (ret)
 349		return ret;
 350
 351	for (i = 0; i < length; i++) {
 352		val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 353		ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 354		if (ret < 0) {
 355			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 356			return ret;
 357		}
 358
 359		ret = smsc95xx_wait_eeprom(dev);
 360		if (ret < 0)
 361			return ret;
 362
 363		ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 364		if (ret < 0) {
 365			netdev_warn(dev->net, "Error reading E2P_DATA\n");
 366			return ret;
 367		}
 368
 369		data[i] = val & 0xFF;
 370		offset++;
 371	}
 372
 373	return 0;
 374}
 375
 376static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 377				 u8 *data)
 378{
 379	u32 val;
 380	int i, ret;
 381
 382	BUG_ON(!dev);
 383	BUG_ON(!data);
 384
 385	ret = smsc95xx_eeprom_confirm_not_busy(dev);
 386	if (ret)
 387		return ret;
 388
 389	/* Issue write/erase enable command */
 390	val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 391	ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 392	if (ret < 0) {
 393		netdev_warn(dev->net, "Error writing E2P_DATA\n");
 394		return ret;
 395	}
 396
 397	ret = smsc95xx_wait_eeprom(dev);
 398	if (ret < 0)
 399		return ret;
 400
 401	for (i = 0; i < length; i++) {
 402
 403		/* Fill data register */
 404		val = data[i];
 405		ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 406		if (ret < 0) {
 407			netdev_warn(dev->net, "Error writing E2P_DATA\n");
 408			return ret;
 409		}
 410
 411		/* Send "write" command */
 412		val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 413		ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 414		if (ret < 0) {
 415			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 416			return ret;
 417		}
 418
 419		ret = smsc95xx_wait_eeprom(dev);
 420		if (ret < 0)
 421			return ret;
 422
 423		offset++;
 424	}
 425
 426	return 0;
 427}
 428
 429static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 430						 u32 data)
 431{
 432	const u16 size = 4;
 433	u32 buf;
 434	int ret;
 435
 436	buf = data;
 437	cpu_to_le32s(&buf);
 438
 439	ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 440				     USB_DIR_OUT | USB_TYPE_VENDOR |
 441				     USB_RECIP_DEVICE,
 442				     0, index, &buf, size);
 443	if (ret < 0)
 444		netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 445			    ret);
 446	return ret;
 447}
 448
 449/* returns hash bit number for given MAC address
 450 * example:
 451 * 01 00 5E 00 00 01 -> returns bit number 31 */
 452static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 453{
 454	return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 455}
 456
 457static void smsc95xx_set_multicast(struct net_device *netdev)
 458{
 459	struct usbnet *dev = netdev_priv(netdev);
 460	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 461	unsigned long flags;
 462	int ret;
 463
 464	pdata->hash_hi = 0;
 465	pdata->hash_lo = 0;
 466
 467	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 468
 469	if (dev->net->flags & IFF_PROMISC) {
 470		netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 471		pdata->mac_cr |= MAC_CR_PRMS_;
 472		pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 473	} else if (dev->net->flags & IFF_ALLMULTI) {
 474		netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 475		pdata->mac_cr |= MAC_CR_MCPAS_;
 476		pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 477	} else if (!netdev_mc_empty(dev->net)) {
 478		struct netdev_hw_addr *ha;
 479
 480		pdata->mac_cr |= MAC_CR_HPFILT_;
 481		pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 482
 483		netdev_for_each_mc_addr(ha, netdev) {
 484			u32 bitnum = smsc95xx_hash(ha->addr);
 485			u32 mask = 0x01 << (bitnum & 0x1F);
 486			if (bitnum & 0x20)
 487				pdata->hash_hi |= mask;
 488			else
 489				pdata->hash_lo |= mask;
 490		}
 491
 492		netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 493				   pdata->hash_hi, pdata->hash_lo);
 494	} else {
 495		netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 496		pdata->mac_cr &=
 497			~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 498	}
 499
 500	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 501
 502	/* Initiate async writes, as we can't wait for completion here */
 503	ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 504	if (ret < 0)
 505		netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 506
 507	ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 508	if (ret < 0)
 509		netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 510
 511	ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 512	if (ret < 0)
 513		netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 514}
 515
 516static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 517					   u16 lcladv, u16 rmtadv)
 518{
 519	u32 flow, afc_cfg = 0;
 520
 521	int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 522	if (ret < 0)
 523		return ret;
 524
 525	if (duplex == DUPLEX_FULL) {
 526		u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 527
 528		if (cap & FLOW_CTRL_RX)
 529			flow = 0xFFFF0002;
 530		else
 531			flow = 0;
 532
 533		if (cap & FLOW_CTRL_TX)
 534			afc_cfg |= 0xF;
 535		else
 536			afc_cfg &= ~0xF;
 537
 538		netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 539				   cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 540				   cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 541	} else {
 542		netif_dbg(dev, link, dev->net, "half duplex\n");
 543		flow = 0;
 544		afc_cfg |= 0xF;
 545	}
 546
 547	ret = smsc95xx_write_reg(dev, FLOW, flow);
 548	if (ret < 0)
 549		return ret;
 550
 551	return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 552}
 553
 554static int smsc95xx_link_reset(struct usbnet *dev)
 555{
 556	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 557	struct mii_if_info *mii = &dev->mii;
 558	struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 559	unsigned long flags;
 560	u16 lcladv, rmtadv;
 561	int ret;
 562
 563	/* clear interrupt status */
 564	ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 565	if (ret < 0)
 566		return ret;
 567
 568	ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 569	if (ret < 0)
 570		return ret;
 571
 572	mii_check_media(mii, 1, 1);
 573	mii_ethtool_gset(&dev->mii, &ecmd);
 574	lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 575	rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 576
 577	netif_dbg(dev, link, dev->net,
 578		  "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 579		  ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 580
 581	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 582	if (ecmd.duplex != DUPLEX_FULL) {
 583		pdata->mac_cr &= ~MAC_CR_FDPX_;
 584		pdata->mac_cr |= MAC_CR_RCVOWN_;
 585	} else {
 586		pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 587		pdata->mac_cr |= MAC_CR_FDPX_;
 588	}
 589	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 590
 591	ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 592	if (ret < 0)
 593		return ret;
 594
 595	ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 596	if (ret < 0)
 597		netdev_warn(dev->net, "Error updating PHY flow control\n");
 598
 599	return ret;
 600}
 601
 602static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 603{
 604	u32 intdata;
 605
 606	if (urb->actual_length != 4) {
 607		netdev_warn(dev->net, "unexpected urb length %d\n",
 608			    urb->actual_length);
 609		return;
 610	}
 611
 612	memcpy(&intdata, urb->transfer_buffer, 4);
 613	le32_to_cpus(&intdata);
 614
 615	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 616
 617	if (intdata & INT_ENP_PHY_INT_)
 618		usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 619	else
 620		netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 621			    intdata);
 622}
 623
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 624/* Enable or disable Tx & Rx checksum offload engines */
 625static int smsc95xx_set_features(struct net_device *netdev,
 626	netdev_features_t features)
 627{
 628	struct usbnet *dev = netdev_priv(netdev);
 629	u32 read_buf;
 630	int ret;
 631
 632	ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 633	if (ret < 0)
 634		return ret;
 635
 636	if (features & NETIF_F_HW_CSUM)
 637		read_buf |= Tx_COE_EN_;
 638	else
 639		read_buf &= ~Tx_COE_EN_;
 640
 641	if (features & NETIF_F_RXCSUM)
 642		read_buf |= Rx_COE_EN_;
 643	else
 644		read_buf &= ~Rx_COE_EN_;
 645
 646	ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 647	if (ret < 0)
 648		return ret;
 649
 650	netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 651	return 0;
 652}
 653
 654static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 655{
 656	return MAX_EEPROM_SIZE;
 657}
 658
 659static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 660				       struct ethtool_eeprom *ee, u8 *data)
 661{
 662	struct usbnet *dev = netdev_priv(netdev);
 663
 664	ee->magic = LAN95XX_EEPROM_MAGIC;
 665
 666	return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 667}
 668
 669static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 670				       struct ethtool_eeprom *ee, u8 *data)
 671{
 672	struct usbnet *dev = netdev_priv(netdev);
 673
 674	if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 675		netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 676			    ee->magic);
 677		return -EINVAL;
 678	}
 679
 680	return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 681}
 682
 683static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 684{
 685	/* all smsc95xx registers */
 686	return COE_CR - ID_REV + sizeof(u32);
 687}
 688
 689static void
 690smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 691			 void *buf)
 692{
 693	struct usbnet *dev = netdev_priv(netdev);
 694	unsigned int i, j;
 695	int retval;
 696	u32 *data = buf;
 697
 698	retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 699	if (retval < 0) {
 700		netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 701		return;
 702	}
 703
 704	for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 705		retval = smsc95xx_read_reg(dev, i, &data[j]);
 706		if (retval < 0) {
 707			netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 708			return;
 709		}
 710	}
 711}
 712
 713static void smsc95xx_ethtool_get_wol(struct net_device *net,
 714				     struct ethtool_wolinfo *wolinfo)
 715{
 716	struct usbnet *dev = netdev_priv(net);
 717	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 718
 719	wolinfo->supported = SUPPORTED_WAKE;
 720	wolinfo->wolopts = pdata->wolopts;
 721}
 722
 723static int smsc95xx_ethtool_set_wol(struct net_device *net,
 724				    struct ethtool_wolinfo *wolinfo)
 725{
 726	struct usbnet *dev = netdev_priv(net);
 727	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 728	int ret;
 729
 730	pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 731
 732	ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 733	if (ret < 0)
 734		netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 735
 736	return ret;
 737}
 738
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 739static const struct ethtool_ops smsc95xx_ethtool_ops = {
 740	.get_link	= usbnet_get_link,
 741	.nway_reset	= usbnet_nway_reset,
 742	.get_drvinfo	= usbnet_get_drvinfo,
 743	.get_msglevel	= usbnet_get_msglevel,
 744	.set_msglevel	= usbnet_set_msglevel,
 745	.get_settings	= usbnet_get_settings,
 746	.set_settings	= usbnet_set_settings,
 747	.get_eeprom_len	= smsc95xx_ethtool_get_eeprom_len,
 748	.get_eeprom	= smsc95xx_ethtool_get_eeprom,
 749	.set_eeprom	= smsc95xx_ethtool_set_eeprom,
 750	.get_regs_len	= smsc95xx_ethtool_getregslen,
 751	.get_regs	= smsc95xx_ethtool_getregs,
 752	.get_wol	= smsc95xx_ethtool_get_wol,
 753	.set_wol	= smsc95xx_ethtool_set_wol,
 754};
 755
 756static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 757{
 758	struct usbnet *dev = netdev_priv(netdev);
 759
 760	if (!netif_running(netdev))
 761		return -EINVAL;
 762
 763	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 764}
 765
 766static void smsc95xx_init_mac_address(struct usbnet *dev)
 767{
 
 
 
 
 
 
 
 
 
 768	/* try reading mac address from EEPROM */
 769	if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 770			dev->net->dev_addr) == 0) {
 771		if (is_valid_ether_addr(dev->net->dev_addr)) {
 772			/* eeprom values are valid so use them */
 773			netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 774			return;
 775		}
 776	}
 777
 778	/* no eeprom, or eeprom values are invalid. generate random MAC */
 779	eth_hw_addr_random(dev->net);
 780	netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 781}
 782
 783static int smsc95xx_set_mac_address(struct usbnet *dev)
 784{
 785	u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 786		dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 787	u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 788	int ret;
 789
 790	ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 791	if (ret < 0)
 792		return ret;
 793
 794	return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 795}
 796
 797/* starts the TX path */
 798static int smsc95xx_start_tx_path(struct usbnet *dev)
 799{
 800	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 801	unsigned long flags;
 802	int ret;
 803
 804	/* Enable Tx at MAC */
 805	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 806	pdata->mac_cr |= MAC_CR_TXEN_;
 807	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 808
 809	ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 810	if (ret < 0)
 811		return ret;
 812
 813	/* Enable Tx at SCSRs */
 814	return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 815}
 816
 817/* Starts the Receive path */
 818static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 819{
 820	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 821	unsigned long flags;
 822
 823	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 824	pdata->mac_cr |= MAC_CR_RXEN_;
 825	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 826
 827	return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 828}
 829
 830static int smsc95xx_phy_initialize(struct usbnet *dev)
 831{
 832	int bmcr, ret, timeout = 0;
 833
 834	/* Initialize MII structure */
 835	dev->mii.dev = dev->net;
 836	dev->mii.mdio_read = smsc95xx_mdio_read;
 837	dev->mii.mdio_write = smsc95xx_mdio_write;
 838	dev->mii.phy_id_mask = 0x1f;
 839	dev->mii.reg_num_mask = 0x1f;
 840	dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
 841
 842	/* reset phy and wait for reset to complete */
 843	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 844
 845	do {
 846		msleep(10);
 847		bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 848		timeout++;
 849	} while ((bmcr & BMCR_RESET) && (timeout < 100));
 850
 851	if (timeout >= 100) {
 852		netdev_warn(dev->net, "timeout on PHY Reset");
 853		return -EIO;
 854	}
 855
 856	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 857		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 858		ADVERTISE_PAUSE_ASYM);
 859
 860	/* read to clear */
 861	ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 862	if (ret < 0) {
 863		netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
 864		return ret;
 865	}
 866
 867	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 868		PHY_INT_MASK_DEFAULT_);
 869	mii_nway_restart(&dev->mii);
 870
 871	netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 872	return 0;
 873}
 874
 875static int smsc95xx_reset(struct usbnet *dev)
 876{
 877	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 878	u32 read_buf, write_buf, burst_cap;
 879	int ret = 0, timeout;
 880
 881	netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
 882
 883	ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
 884	if (ret < 0)
 885		return ret;
 886
 887	timeout = 0;
 888	do {
 889		msleep(10);
 890		ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 891		if (ret < 0)
 892			return ret;
 893		timeout++;
 894	} while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
 895
 896	if (timeout >= 100) {
 897		netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
 898		return ret;
 899	}
 900
 901	ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
 902	if (ret < 0)
 903		return ret;
 904
 905	timeout = 0;
 906	do {
 907		msleep(10);
 908		ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
 909		if (ret < 0)
 910			return ret;
 911		timeout++;
 912	} while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
 913
 914	if (timeout >= 100) {
 915		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
 916		return ret;
 917	}
 918
 919	ret = smsc95xx_set_mac_address(dev);
 920	if (ret < 0)
 921		return ret;
 922
 923	netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
 924		  dev->net->dev_addr);
 925
 926	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 927	if (ret < 0)
 928		return ret;
 929
 930	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
 931		  read_buf);
 932
 933	read_buf |= HW_CFG_BIR_;
 934
 935	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
 936	if (ret < 0)
 937		return ret;
 938
 939	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 940	if (ret < 0)
 941		return ret;
 942
 943	netif_dbg(dev, ifup, dev->net,
 944		  "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
 945		  read_buf);
 946
 947	if (!turbo_mode) {
 948		burst_cap = 0;
 949		dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 950	} else if (dev->udev->speed == USB_SPEED_HIGH) {
 951		burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 952		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 953	} else {
 954		burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 955		dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 956	}
 957
 958	netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
 959		  (ulong)dev->rx_urb_size);
 960
 961	ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
 962	if (ret < 0)
 963		return ret;
 964
 965	ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
 966	if (ret < 0)
 967		return ret;
 968
 969	netif_dbg(dev, ifup, dev->net,
 970		  "Read Value from BURST_CAP after writing: 0x%08x\n",
 971		  read_buf);
 972
 973	ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 974	if (ret < 0)
 975		return ret;
 976
 977	ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
 978	if (ret < 0)
 979		return ret;
 980
 981	netif_dbg(dev, ifup, dev->net,
 982		  "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
 983		  read_buf);
 984
 985	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
 986	if (ret < 0)
 987		return ret;
 988
 989	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
 990		  read_buf);
 991
 992	if (turbo_mode)
 993		read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
 994
 995	read_buf &= ~HW_CFG_RXDOFF_;
 996
 997	/* set Rx data offset=2, Make IP header aligns on word boundary. */
 998	read_buf |= NET_IP_ALIGN << 9;
 999
1000	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1001	if (ret < 0)
1002		return ret;
1003
1004	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1005	if (ret < 0)
1006		return ret;
1007
1008	netif_dbg(dev, ifup, dev->net,
1009		  "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1010
1011	ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1012	if (ret < 0)
1013		return ret;
1014
1015	ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1016	if (ret < 0)
1017		return ret;
1018	netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1019
1020	/* Configure GPIO pins as LED outputs */
1021	write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1022		LED_GPIO_CFG_FDX_LED;
1023	ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1024	if (ret < 0)
1025		return ret;
1026
1027	/* Init Tx */
1028	ret = smsc95xx_write_reg(dev, FLOW, 0);
1029	if (ret < 0)
1030		return ret;
1031
1032	ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1033	if (ret < 0)
1034		return ret;
1035
1036	/* Don't need mac_cr_lock during initialisation */
1037	ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1038	if (ret < 0)
1039		return ret;
1040
1041	/* Init Rx */
1042	/* Set Vlan */
1043	ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1044	if (ret < 0)
1045		return ret;
1046
1047	/* Enable or disable checksum offload engines */
1048	ret = smsc95xx_set_features(dev->net, dev->net->features);
1049	if (ret < 0) {
1050		netdev_warn(dev->net, "Failed to set checksum offload features\n");
1051		return ret;
1052	}
1053
1054	smsc95xx_set_multicast(dev->net);
1055
1056	ret = smsc95xx_phy_initialize(dev);
1057	if (ret < 0) {
1058		netdev_warn(dev->net, "Failed to init PHY\n");
1059		return ret;
1060	}
1061
1062	ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1063	if (ret < 0)
1064		return ret;
1065
1066	/* enable PHY interrupts */
1067	read_buf |= INT_EP_CTL_PHY_INT_;
1068
1069	ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1070	if (ret < 0)
1071		return ret;
1072
1073	ret = smsc95xx_start_tx_path(dev);
1074	if (ret < 0) {
1075		netdev_warn(dev->net, "Failed to start TX path\n");
1076		return ret;
1077	}
1078
1079	ret = smsc95xx_start_rx_path(dev, 0);
1080	if (ret < 0) {
1081		netdev_warn(dev->net, "Failed to start RX path\n");
1082		return ret;
1083	}
1084
1085	netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1086	return 0;
1087}
1088
1089static const struct net_device_ops smsc95xx_netdev_ops = {
1090	.ndo_open		= usbnet_open,
1091	.ndo_stop		= usbnet_stop,
1092	.ndo_start_xmit		= usbnet_start_xmit,
1093	.ndo_tx_timeout		= usbnet_tx_timeout,
1094	.ndo_change_mtu		= usbnet_change_mtu,
1095	.ndo_set_mac_address 	= eth_mac_addr,
1096	.ndo_validate_addr	= eth_validate_addr,
1097	.ndo_do_ioctl 		= smsc95xx_ioctl,
1098	.ndo_set_rx_mode	= smsc95xx_set_multicast,
1099	.ndo_set_features	= smsc95xx_set_features,
1100};
1101
1102static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1103{
1104	struct smsc95xx_priv *pdata = NULL;
1105	u32 val;
1106	int ret;
1107
1108	printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1109
1110	ret = usbnet_get_endpoints(dev, intf);
1111	if (ret < 0) {
1112		netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1113		return ret;
1114	}
1115
1116	dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1117					      GFP_KERNEL);
1118
1119	pdata = (struct smsc95xx_priv *)(dev->data[0]);
1120	if (!pdata)
1121		return -ENOMEM;
1122
1123	spin_lock_init(&pdata->mac_cr_lock);
1124
1125	if (DEFAULT_TX_CSUM_ENABLE)
1126		dev->net->features |= NETIF_F_HW_CSUM;
1127	if (DEFAULT_RX_CSUM_ENABLE)
1128		dev->net->features |= NETIF_F_RXCSUM;
1129
1130	dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1131
1132	smsc95xx_init_mac_address(dev);
1133
1134	/* Init all registers */
1135	ret = smsc95xx_reset(dev);
1136
1137	/* detect device revision as different features may be available */
1138	ret = smsc95xx_read_reg(dev, ID_REV, &val);
1139	if (ret < 0)
1140		return ret;
1141	val >>= 16;
 
 
1142
1143	if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1144	    (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1145		pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1146			FEATURE_PHY_NLP_CROSSOVER |
1147			FEATURE_REMOTE_WAKEUP);
1148	else if (val == ID_REV_CHIP_ID_9512_)
1149		pdata->features = FEATURE_8_WAKEUP_FILTERS;
1150
1151	dev->net->netdev_ops = &smsc95xx_netdev_ops;
1152	dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1153	dev->net->flags |= IFF_MULTICAST;
1154	dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1155	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
 
 
 
 
 
1156	return 0;
1157}
1158
1159static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1160{
1161	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 
1162	if (pdata) {
 
1163		netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1164		kfree(pdata);
1165		pdata = NULL;
1166		dev->data[0] = 0;
1167	}
1168}
1169
1170static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1171{
1172	u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1173	return crc << ((filter % 2) * 16);
1174}
1175
1176static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1177{
1178	struct mii_if_info *mii = &dev->mii;
1179	int ret;
1180
1181	netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1182
1183	/* read to clear */
1184	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1185	if (ret < 0)
1186		return ret;
1187
1188	/* enable interrupt source */
1189	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1190	if (ret < 0)
1191		return ret;
1192
1193	ret |= mask;
1194
1195	smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1196
1197	return 0;
1198}
1199
1200static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1201{
1202	struct mii_if_info *mii = &dev->mii;
1203	int ret;
1204
1205	/* first, a dummy read, needed to latch some MII phys */
1206	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1207	if (ret < 0)
1208		return ret;
1209
1210	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1211	if (ret < 0)
1212		return ret;
1213
1214	return !!(ret & BMSR_LSTATUS);
1215}
1216
1217static int smsc95xx_enter_suspend0(struct usbnet *dev)
1218{
1219	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1220	u32 val;
1221	int ret;
1222
1223	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1224	if (ret < 0)
1225		return ret;
1226
1227	val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1228	val |= PM_CTL_SUS_MODE_0;
1229
1230	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1231	if (ret < 0)
1232		return ret;
1233
1234	/* clear wol status */
1235	val &= ~PM_CTL_WUPS_;
1236	val |= PM_CTL_WUPS_WOL_;
1237
1238	/* enable energy detection */
1239	if (pdata->wolopts & WAKE_PHY)
1240		val |= PM_CTL_WUPS_ED_;
1241
1242	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1243	if (ret < 0)
1244		return ret;
1245
1246	/* read back PM_CTRL */
1247	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1248	if (ret < 0)
1249		return ret;
1250
1251	pdata->suspend_flags |= SUSPEND_SUSPEND0;
1252
1253	return 0;
1254}
1255
1256static int smsc95xx_enter_suspend1(struct usbnet *dev)
1257{
1258	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1259	struct mii_if_info *mii = &dev->mii;
1260	u32 val;
1261	int ret;
1262
1263	/* reconfigure link pulse detection timing for
1264	 * compatibility with non-standard link partners
1265	 */
1266	if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1267		smsc95xx_mdio_write_nopm(dev->net, mii->phy_id,	PHY_EDPD_CONFIG,
1268			PHY_EDPD_CONFIG_DEFAULT);
1269
1270	/* enable energy detect power-down mode */
1271	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1272	if (ret < 0)
1273		return ret;
1274
1275	ret |= MODE_CTRL_STS_EDPWRDOWN_;
1276
1277	smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1278
1279	/* enter SUSPEND1 mode */
1280	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1281	if (ret < 0)
1282		return ret;
1283
1284	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1285	val |= PM_CTL_SUS_MODE_1;
1286
1287	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1288	if (ret < 0)
1289		return ret;
1290
1291	/* clear wol status, enable energy detection */
1292	val &= ~PM_CTL_WUPS_;
1293	val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1294
1295	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1296	if (ret < 0)
1297		return ret;
1298
1299	pdata->suspend_flags |= SUSPEND_SUSPEND1;
1300
1301	return 0;
1302}
1303
1304static int smsc95xx_enter_suspend2(struct usbnet *dev)
1305{
1306	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1307	u32 val;
1308	int ret;
1309
1310	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1311	if (ret < 0)
1312		return ret;
1313
1314	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1315	val |= PM_CTL_SUS_MODE_2;
1316
1317	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1318	if (ret < 0)
1319		return ret;
1320
1321	pdata->suspend_flags |= SUSPEND_SUSPEND2;
1322
1323	return 0;
1324}
1325
1326static int smsc95xx_enter_suspend3(struct usbnet *dev)
1327{
1328	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1329	u32 val;
1330	int ret;
1331
1332	ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1333	if (ret < 0)
1334		return ret;
1335
1336	if (val & 0xFFFF) {
1337		netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1338		return -EBUSY;
1339	}
1340
1341	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1342	if (ret < 0)
1343		return ret;
1344
1345	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1346	val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1347
1348	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1349	if (ret < 0)
1350		return ret;
1351
1352	/* clear wol status */
1353	val &= ~PM_CTL_WUPS_;
1354	val |= PM_CTL_WUPS_WOL_;
1355
1356	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1357	if (ret < 0)
1358		return ret;
1359
1360	pdata->suspend_flags |= SUSPEND_SUSPEND3;
1361
1362	return 0;
1363}
1364
1365static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1366{
1367	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1368	int ret;
1369
1370	if (!netif_running(dev->net)) {
1371		/* interface is ifconfig down so fully power down hw */
1372		netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1373		return smsc95xx_enter_suspend2(dev);
1374	}
1375
1376	if (!link_up) {
1377		/* link is down so enter EDPD mode, but only if device can
1378		 * reliably resume from it.  This check should be redundant
1379		 * as current FEATURE_REMOTE_WAKEUP parts also support
1380		 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1381		if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1382			netdev_warn(dev->net, "EDPD not supported\n");
1383			return -EBUSY;
1384		}
1385
1386		netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1387
1388		/* enable PHY wakeup events for if cable is attached */
1389		ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1390			PHY_INT_MASK_ANEG_COMP_);
1391		if (ret < 0) {
1392			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1393			return ret;
1394		}
1395
1396		netdev_info(dev->net, "entering SUSPEND1 mode\n");
1397		return smsc95xx_enter_suspend1(dev);
1398	}
1399
1400	/* enable PHY wakeup events so we remote wakeup if cable is pulled */
1401	ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1402		PHY_INT_MASK_LINK_DOWN_);
1403	if (ret < 0) {
1404		netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1405		return ret;
1406	}
1407
1408	netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1409	return smsc95xx_enter_suspend3(dev);
1410}
1411
1412static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1413{
1414	struct usbnet *dev = usb_get_intfdata(intf);
1415	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1416	u32 val, link_up;
1417	int ret;
1418
1419	ret = usbnet_suspend(intf, message);
1420	if (ret < 0) {
1421		netdev_warn(dev->net, "usbnet_suspend error\n");
1422		return ret;
1423	}
1424
1425	if (pdata->suspend_flags) {
1426		netdev_warn(dev->net, "error during last resume\n");
1427		pdata->suspend_flags = 0;
1428	}
1429
1430	/* determine if link is up using only _nopm functions */
1431	link_up = smsc95xx_link_ok_nopm(dev);
1432
1433	if (message.event == PM_EVENT_AUTO_SUSPEND &&
1434	    (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1435		ret = smsc95xx_autosuspend(dev, link_up);
1436		goto done;
1437	}
1438
1439	/* if we get this far we're not autosuspending */
1440	/* if no wol options set, or if link is down and we're not waking on
1441	 * PHY activity, enter lowest power SUSPEND2 mode
1442	 */
1443	if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1444		!(link_up || (pdata->wolopts & WAKE_PHY))) {
1445		netdev_info(dev->net, "entering SUSPEND2 mode\n");
1446
1447		/* disable energy detect (link up) & wake up events */
1448		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1449		if (ret < 0)
1450			goto done;
1451
1452		val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1453
1454		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1455		if (ret < 0)
1456			goto done;
1457
1458		ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1459		if (ret < 0)
1460			goto done;
1461
1462		val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1463
1464		ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1465		if (ret < 0)
1466			goto done;
1467
1468		ret = smsc95xx_enter_suspend2(dev);
1469		goto done;
1470	}
1471
1472	if (pdata->wolopts & WAKE_PHY) {
1473		ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1474			(PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1475		if (ret < 0) {
1476			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1477			goto done;
1478		}
1479
1480		/* if link is down then configure EDPD and enter SUSPEND1,
1481		 * otherwise enter SUSPEND0 below
1482		 */
1483		if (!link_up) {
1484			netdev_info(dev->net, "entering SUSPEND1 mode\n");
1485			ret = smsc95xx_enter_suspend1(dev);
1486			goto done;
1487		}
1488	}
1489
1490	if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1491		u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1492		u32 command[2];
1493		u32 offset[2];
1494		u32 crc[4];
1495		int wuff_filter_count =
1496			(pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1497			LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1498		int i, filter = 0;
1499
1500		if (!filter_mask) {
1501			netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1502			ret = -ENOMEM;
1503			goto done;
1504		}
1505
1506		memset(command, 0, sizeof(command));
1507		memset(offset, 0, sizeof(offset));
1508		memset(crc, 0, sizeof(crc));
1509
1510		if (pdata->wolopts & WAKE_BCAST) {
1511			const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1512			netdev_info(dev->net, "enabling broadcast detection\n");
1513			filter_mask[filter * 4] = 0x003F;
1514			filter_mask[filter * 4 + 1] = 0x00;
1515			filter_mask[filter * 4 + 2] = 0x00;
1516			filter_mask[filter * 4 + 3] = 0x00;
1517			command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1518			offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1519			crc[filter/2] |= smsc_crc(bcast, 6, filter);
1520			filter++;
1521		}
1522
1523		if (pdata->wolopts & WAKE_MCAST) {
1524			const u8 mcast[] = {0x01, 0x00, 0x5E};
1525			netdev_info(dev->net, "enabling multicast detection\n");
1526			filter_mask[filter * 4] = 0x0007;
1527			filter_mask[filter * 4 + 1] = 0x00;
1528			filter_mask[filter * 4 + 2] = 0x00;
1529			filter_mask[filter * 4 + 3] = 0x00;
1530			command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1531			offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1532			crc[filter/2] |= smsc_crc(mcast, 3, filter);
1533			filter++;
1534		}
1535
1536		if (pdata->wolopts & WAKE_ARP) {
1537			const u8 arp[] = {0x08, 0x06};
1538			netdev_info(dev->net, "enabling ARP detection\n");
1539			filter_mask[filter * 4] = 0x0003;
1540			filter_mask[filter * 4 + 1] = 0x00;
1541			filter_mask[filter * 4 + 2] = 0x00;
1542			filter_mask[filter * 4 + 3] = 0x00;
1543			command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1544			offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1545			crc[filter/2] |= smsc_crc(arp, 2, filter);
1546			filter++;
1547		}
1548
1549		if (pdata->wolopts & WAKE_UCAST) {
1550			netdev_info(dev->net, "enabling unicast detection\n");
1551			filter_mask[filter * 4] = 0x003F;
1552			filter_mask[filter * 4 + 1] = 0x00;
1553			filter_mask[filter * 4 + 2] = 0x00;
1554			filter_mask[filter * 4 + 3] = 0x00;
1555			command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1556			offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1557			crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1558			filter++;
1559		}
1560
1561		for (i = 0; i < (wuff_filter_count * 4); i++) {
1562			ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1563			if (ret < 0) {
1564				kfree(filter_mask);
1565				goto done;
1566			}
1567		}
1568		kfree(filter_mask);
1569
1570		for (i = 0; i < (wuff_filter_count / 4); i++) {
1571			ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1572			if (ret < 0)
1573				goto done;
1574		}
1575
1576		for (i = 0; i < (wuff_filter_count / 4); i++) {
1577			ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1578			if (ret < 0)
1579				goto done;
1580		}
1581
1582		for (i = 0; i < (wuff_filter_count / 2); i++) {
1583			ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1584			if (ret < 0)
1585				goto done;
1586		}
1587
1588		/* clear any pending pattern match packet status */
1589		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1590		if (ret < 0)
1591			goto done;
1592
1593		val |= WUCSR_WUFR_;
1594
1595		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1596		if (ret < 0)
1597			goto done;
1598	}
1599
1600	if (pdata->wolopts & WAKE_MAGIC) {
1601		/* clear any pending magic packet status */
1602		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1603		if (ret < 0)
1604			goto done;
1605
1606		val |= WUCSR_MPR_;
1607
1608		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1609		if (ret < 0)
1610			goto done;
1611	}
1612
1613	/* enable/disable wakeup sources */
1614	ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1615	if (ret < 0)
1616		goto done;
1617
1618	if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1619		netdev_info(dev->net, "enabling pattern match wakeup\n");
1620		val |= WUCSR_WAKE_EN_;
1621	} else {
1622		netdev_info(dev->net, "disabling pattern match wakeup\n");
1623		val &= ~WUCSR_WAKE_EN_;
1624	}
1625
1626	if (pdata->wolopts & WAKE_MAGIC) {
1627		netdev_info(dev->net, "enabling magic packet wakeup\n");
1628		val |= WUCSR_MPEN_;
1629	} else {
1630		netdev_info(dev->net, "disabling magic packet wakeup\n");
1631		val &= ~WUCSR_MPEN_;
1632	}
1633
1634	ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1635	if (ret < 0)
1636		goto done;
1637
1638	/* enable wol wakeup source */
1639	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1640	if (ret < 0)
1641		goto done;
1642
1643	val |= PM_CTL_WOL_EN_;
1644
1645	/* phy energy detect wakeup source */
1646	if (pdata->wolopts & WAKE_PHY)
1647		val |= PM_CTL_ED_EN_;
1648
1649	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1650	if (ret < 0)
1651		goto done;
1652
1653	/* enable receiver to enable frame reception */
1654	smsc95xx_start_rx_path(dev, 1);
1655
1656	/* some wol options are enabled, so enter SUSPEND0 */
1657	netdev_info(dev->net, "entering SUSPEND0 mode\n");
1658	ret = smsc95xx_enter_suspend0(dev);
1659
1660done:
1661	/*
1662	 * TODO: resume() might need to handle the suspend failure
1663	 * in system sleep
1664	 */
1665	if (ret && PMSG_IS_AUTO(message))
1666		usbnet_resume(intf);
1667	return ret;
1668}
1669
1670static int smsc95xx_resume(struct usb_interface *intf)
1671{
1672	struct usbnet *dev = usb_get_intfdata(intf);
1673	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1674	u8 suspend_flags = pdata->suspend_flags;
1675	int ret;
1676	u32 val;
1677
1678	BUG_ON(!dev);
 
 
1679
1680	netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1681
1682	/* do this first to ensure it's cleared even in error case */
1683	pdata->suspend_flags = 0;
 
1684
1685	if (suspend_flags & SUSPEND_ALLMODES) {
1686		/* clear wake-up sources */
1687		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1688		if (ret < 0)
1689			return ret;
1690
1691		val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1692
1693		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1694		if (ret < 0)
1695			return ret;
1696
1697		/* clear wake-up status */
1698		ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1699		if (ret < 0)
1700			return ret;
1701
1702		val &= ~PM_CTL_WOL_EN_;
1703		val |= PM_CTL_WUPS_;
1704
1705		ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1706		if (ret < 0)
1707			return ret;
1708	}
1709
1710	ret = usbnet_resume(intf);
1711	if (ret < 0)
1712		netdev_warn(dev->net, "usbnet_resume error\n");
1713
1714	return ret;
1715}
1716
 
 
 
 
 
 
 
 
 
 
 
 
1717static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1718{
1719	skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1720	skb->ip_summed = CHECKSUM_COMPLETE;
1721	skb_trim(skb, skb->len - 2);
1722}
1723
1724static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1725{
1726	/* This check is no longer done by usbnet */
1727	if (skb->len < dev->net->hard_header_len)
1728		return 0;
1729
1730	while (skb->len > 0) {
1731		u32 header, align_count;
1732		struct sk_buff *ax_skb;
1733		unsigned char *packet;
1734		u16 size;
1735
1736		memcpy(&header, skb->data, sizeof(header));
1737		le32_to_cpus(&header);
1738		skb_pull(skb, 4 + NET_IP_ALIGN);
1739		packet = skb->data;
1740
1741		/* get the packet length */
1742		size = (u16)((header & RX_STS_FL_) >> 16);
1743		align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1744
1745		if (unlikely(header & RX_STS_ES_)) {
1746			netif_dbg(dev, rx_err, dev->net,
1747				  "Error header=0x%08x\n", header);
1748			dev->net->stats.rx_errors++;
1749			dev->net->stats.rx_dropped++;
1750
1751			if (header & RX_STS_CRC_) {
1752				dev->net->stats.rx_crc_errors++;
1753			} else {
1754				if (header & (RX_STS_TL_ | RX_STS_RF_))
1755					dev->net->stats.rx_frame_errors++;
1756
1757				if ((header & RX_STS_LE_) &&
1758					(!(header & RX_STS_FT_)))
1759					dev->net->stats.rx_length_errors++;
1760			}
1761		} else {
1762			/* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1763			if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1764				netif_dbg(dev, rx_err, dev->net,
1765					  "size err header=0x%08x\n", header);
1766				return 0;
1767			}
1768
1769			/* last frame in this batch */
1770			if (skb->len == size) {
1771				if (dev->net->features & NETIF_F_RXCSUM)
1772					smsc95xx_rx_csum_offload(skb);
1773				skb_trim(skb, skb->len - 4); /* remove fcs */
1774				skb->truesize = size + sizeof(struct sk_buff);
1775
1776				return 1;
1777			}
1778
1779			ax_skb = skb_clone(skb, GFP_ATOMIC);
1780			if (unlikely(!ax_skb)) {
1781				netdev_warn(dev->net, "Error allocating skb\n");
1782				return 0;
1783			}
1784
1785			ax_skb->len = size;
1786			ax_skb->data = packet;
1787			skb_set_tail_pointer(ax_skb, size);
1788
1789			if (dev->net->features & NETIF_F_RXCSUM)
1790				smsc95xx_rx_csum_offload(ax_skb);
1791			skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1792			ax_skb->truesize = size + sizeof(struct sk_buff);
1793
1794			usbnet_skb_return(dev, ax_skb);
1795		}
1796
1797		skb_pull(skb, size);
1798
1799		/* padding bytes before the next frame starts */
1800		if (skb->len)
1801			skb_pull(skb, align_count);
1802	}
1803
1804	if (unlikely(skb->len < 0)) {
1805		netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1806		return 0;
1807	}
1808
1809	return 1;
1810}
1811
1812static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1813{
1814	u16 low_16 = (u16)skb_checksum_start_offset(skb);
1815	u16 high_16 = low_16 + skb->csum_offset;
1816	return (high_16 << 16) | low_16;
1817}
1818
1819static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1820					 struct sk_buff *skb, gfp_t flags)
1821{
1822	bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1823	int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1824	u32 tx_cmd_a, tx_cmd_b;
1825
1826	/* We do not advertise SG, so skbs should be already linearized */
1827	BUG_ON(skb_shinfo(skb)->nr_frags);
1828
1829	if (skb_headroom(skb) < overhead) {
1830		struct sk_buff *skb2 = skb_copy_expand(skb,
1831			overhead, 0, flags);
1832		dev_kfree_skb_any(skb);
1833		skb = skb2;
1834		if (!skb)
1835			return NULL;
1836	}
1837
1838	if (csum) {
1839		if (skb->len <= 45) {
1840			/* workaround - hardware tx checksum does not work
1841			 * properly with extremely small packets */
1842			long csstart = skb_checksum_start_offset(skb);
1843			__wsum calc = csum_partial(skb->data + csstart,
1844				skb->len - csstart, 0);
1845			*((__sum16 *)(skb->data + csstart
1846				+ skb->csum_offset)) = csum_fold(calc);
1847
1848			csum = false;
1849		} else {
1850			u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1851			skb_push(skb, 4);
1852			cpu_to_le32s(&csum_preamble);
1853			memcpy(skb->data, &csum_preamble, 4);
1854		}
1855	}
1856
1857	skb_push(skb, 4);
1858	tx_cmd_b = (u32)(skb->len - 4);
1859	if (csum)
1860		tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1861	cpu_to_le32s(&tx_cmd_b);
1862	memcpy(skb->data, &tx_cmd_b, 4);
1863
1864	skb_push(skb, 4);
1865	tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1866		TX_CMD_A_LAST_SEG_;
1867	cpu_to_le32s(&tx_cmd_a);
1868	memcpy(skb->data, &tx_cmd_a, 4);
1869
1870	return skb;
1871}
1872
1873static int smsc95xx_manage_power(struct usbnet *dev, int on)
1874{
1875	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1876
1877	dev->intf->needs_remote_wakeup = on;
1878
1879	if (pdata->features & FEATURE_REMOTE_WAKEUP)
1880		return 0;
1881
1882	/* this chip revision isn't capable of remote wakeup */
1883	netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1884
1885	if (on)
1886		usb_autopm_get_interface_no_resume(dev->intf);
1887	else
1888		usb_autopm_put_interface(dev->intf);
1889
1890	return 0;
1891}
1892
1893static const struct driver_info smsc95xx_info = {
1894	.description	= "smsc95xx USB 2.0 Ethernet",
1895	.bind		= smsc95xx_bind,
1896	.unbind		= smsc95xx_unbind,
1897	.link_reset	= smsc95xx_link_reset,
1898	.reset		= smsc95xx_reset,
1899	.rx_fixup	= smsc95xx_rx_fixup,
1900	.tx_fixup	= smsc95xx_tx_fixup,
1901	.status		= smsc95xx_status,
1902	.manage_power	= smsc95xx_manage_power,
1903	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1904};
1905
1906static const struct usb_device_id products[] = {
1907	{
1908		/* SMSC9500 USB Ethernet Device */
1909		USB_DEVICE(0x0424, 0x9500),
1910		.driver_info = (unsigned long) &smsc95xx_info,
1911	},
1912	{
1913		/* SMSC9505 USB Ethernet Device */
1914		USB_DEVICE(0x0424, 0x9505),
1915		.driver_info = (unsigned long) &smsc95xx_info,
1916	},
1917	{
1918		/* SMSC9500A USB Ethernet Device */
1919		USB_DEVICE(0x0424, 0x9E00),
1920		.driver_info = (unsigned long) &smsc95xx_info,
1921	},
1922	{
1923		/* SMSC9505A USB Ethernet Device */
1924		USB_DEVICE(0x0424, 0x9E01),
1925		.driver_info = (unsigned long) &smsc95xx_info,
1926	},
1927	{
1928		/* SMSC9512/9514 USB Hub & Ethernet Device */
1929		USB_DEVICE(0x0424, 0xec00),
1930		.driver_info = (unsigned long) &smsc95xx_info,
1931	},
1932	{
1933		/* SMSC9500 USB Ethernet Device (SAL10) */
1934		USB_DEVICE(0x0424, 0x9900),
1935		.driver_info = (unsigned long) &smsc95xx_info,
1936	},
1937	{
1938		/* SMSC9505 USB Ethernet Device (SAL10) */
1939		USB_DEVICE(0x0424, 0x9901),
1940		.driver_info = (unsigned long) &smsc95xx_info,
1941	},
1942	{
1943		/* SMSC9500A USB Ethernet Device (SAL10) */
1944		USB_DEVICE(0x0424, 0x9902),
1945		.driver_info = (unsigned long) &smsc95xx_info,
1946	},
1947	{
1948		/* SMSC9505A USB Ethernet Device (SAL10) */
1949		USB_DEVICE(0x0424, 0x9903),
1950		.driver_info = (unsigned long) &smsc95xx_info,
1951	},
1952	{
1953		/* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1954		USB_DEVICE(0x0424, 0x9904),
1955		.driver_info = (unsigned long) &smsc95xx_info,
1956	},
1957	{
1958		/* SMSC9500A USB Ethernet Device (HAL) */
1959		USB_DEVICE(0x0424, 0x9905),
1960		.driver_info = (unsigned long) &smsc95xx_info,
1961	},
1962	{
1963		/* SMSC9505A USB Ethernet Device (HAL) */
1964		USB_DEVICE(0x0424, 0x9906),
1965		.driver_info = (unsigned long) &smsc95xx_info,
1966	},
1967	{
1968		/* SMSC9500 USB Ethernet Device (Alternate ID) */
1969		USB_DEVICE(0x0424, 0x9907),
1970		.driver_info = (unsigned long) &smsc95xx_info,
1971	},
1972	{
1973		/* SMSC9500A USB Ethernet Device (Alternate ID) */
1974		USB_DEVICE(0x0424, 0x9908),
1975		.driver_info = (unsigned long) &smsc95xx_info,
1976	},
1977	{
1978		/* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1979		USB_DEVICE(0x0424, 0x9909),
1980		.driver_info = (unsigned long) &smsc95xx_info,
1981	},
1982	{
1983		/* SMSC LAN9530 USB Ethernet Device */
1984		USB_DEVICE(0x0424, 0x9530),
1985		.driver_info = (unsigned long) &smsc95xx_info,
1986	},
1987	{
1988		/* SMSC LAN9730 USB Ethernet Device */
1989		USB_DEVICE(0x0424, 0x9730),
1990		.driver_info = (unsigned long) &smsc95xx_info,
1991	},
1992	{
1993		/* SMSC LAN89530 USB Ethernet Device */
1994		USB_DEVICE(0x0424, 0x9E08),
1995		.driver_info = (unsigned long) &smsc95xx_info,
1996	},
1997	{ },		/* END */
1998};
1999MODULE_DEVICE_TABLE(usb, products);
2000
2001static struct usb_driver smsc95xx_driver = {
2002	.name		= "smsc95xx",
2003	.id_table	= products,
2004	.probe		= usbnet_probe,
2005	.suspend	= smsc95xx_suspend,
2006	.resume		= smsc95xx_resume,
2007	.reset_resume	= smsc95xx_resume,
2008	.disconnect	= usbnet_disconnect,
2009	.disable_hub_initiated_lpm = 1,
2010	.supports_autosuspend = 1,
2011};
2012
2013module_usb_driver(smsc95xx_driver);
2014
2015MODULE_AUTHOR("Nancy Lin");
2016MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2017MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2018MODULE_LICENSE("GPL");