1 /***************************************************************************
   2 *
   3 * Copyright (C) 2007-2010 SMSC
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License
   7 * as published by the Free Software Foundation; either version 2
   8 * of the License, or (at your option) any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17 *
  18 *****************************************************************************/
  19
  20#include <linux/module.h>
  21#include <linux/kmod.h>
  22#include <linux/netdevice.h>
  23#include <linux/etherdevice.h>
  24#include <linux/ethtool.h>
  25#include <linux/mii.h>
  26#include <linux/usb.h>
  27#include <linux/bitrev.h>
  28#include <linux/crc16.h>
  29#include <linux/crc32.h>
  30#include <linux/usb/usbnet.h>
  31#include <linux/slab.h>
  32#include <linux/of_net.h>
  33#include "smsc75xx.h"
  34
  35#define SMSC_CHIPNAME			"smsc75xx"
  36#define SMSC_DRIVER_VERSION		"1.0.0"
  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		(9000)
  43#define LAN75XX_EEPROM_MAGIC		(0x7500)
  44#define EEPROM_MAC_OFFSET		(0x01)
  45#define DEFAULT_TX_CSUM_ENABLE		(true)
  46#define DEFAULT_RX_CSUM_ENABLE		(true)
  47#define SMSC75XX_INTERNAL_PHY_ID	(1)
  48#define SMSC75XX_TX_OVERHEAD		(8)
  49#define MAX_RX_FIFO_SIZE		(20 * 1024)
  50#define MAX_TX_FIFO_SIZE		(12 * 1024)
  51#define USB_VENDOR_ID_SMSC		(0x0424)
  52#define USB_PRODUCT_ID_LAN7500		(0x7500)
  53#define USB_PRODUCT_ID_LAN7505		(0x7505)
  54#define RXW_PADDING			2
  55#define SUPPORTED_WAKE			(WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  56					 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  57
  58#define SUSPEND_SUSPEND0		(0x01)
  59#define SUSPEND_SUSPEND1		(0x02)
  60#define SUSPEND_SUSPEND2		(0x04)
  61#define SUSPEND_SUSPEND3		(0x08)
  62#define SUSPEND_ALLMODES		(SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  63					 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  64
  65struct smsc75xx_priv {
  66	struct usbnet *dev;
  67	u32 rfe_ctl;
  68	u32 wolopts;
  69	u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  70	struct mutex dataport_mutex;
  71	spinlock_t rfe_ctl_lock;
  72	struct work_struct set_multicast;
  73	u8 suspend_flags;
  74};
  75
  76struct usb_context {
  77	struct usb_ctrlrequest req;
  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 __smsc75xx_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 __smsc75xx_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 smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 142					       u32 *data)
 143{
 144	return __smsc75xx_read_reg(dev, index, data, 1);
 145}
 146
 147static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 148						u32 data)
 149{
 150	return __smsc75xx_write_reg(dev, index, data, 1);
 151}
 152
 153static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 154					  u32 *data)
 155{
 156	return __smsc75xx_read_reg(dev, index, data, 0);
 157}
 158
 159static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 160					   u32 data)
 161{
 162	return __smsc75xx_write_reg(dev, index, data, 0);
 163}
 164
 165/* Loop until the read is completed with timeout
 166 * called with phy_mutex held */
 167static __must_check int __smsc75xx_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 = __smsc75xx_read_reg(dev, MII_ACCESS, &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_ACCESS_BUSY))
 182			return 0;
 183	} while (!time_after(jiffies, start_time + HZ));
 184
 185	return -EIO;
 186}
 187
 188static int __smsc75xx_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 = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 199	if (ret < 0) {
 200		netdev_warn(dev->net, "MII is busy in smsc75xx_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 << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 208		| ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 209		| MII_ACCESS_READ | MII_ACCESS_BUSY;
 210	ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 211	if (ret < 0) {
 212		netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 213		goto done;
 214	}
 215
 216	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 217	if (ret < 0) {
 218		netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 219		goto done;
 220	}
 221
 222	ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 223	if (ret < 0) {
 224		netdev_warn(dev->net, "Error reading MII_DATA\n");
 225		goto done;
 226	}
 227
 228	ret = (u16)(val & 0xFFFF);
 229
 230done:
 231	mutex_unlock(&dev->phy_mutex);
 232	return ret;
 233}
 234
 235static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 236				  int idx, int regval, int in_pm)
 237{
 238	struct usbnet *dev = netdev_priv(netdev);
 239	u32 val, addr;
 240	int ret;
 241
 242	mutex_lock(&dev->phy_mutex);
 243
 244	/* confirm MII not busy */
 245	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 246	if (ret < 0) {
 247		netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 248		goto done;
 249	}
 250
 251	val = regval;
 252	ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 253	if (ret < 0) {
 254		netdev_warn(dev->net, "Error writing MII_DATA\n");
 255		goto done;
 256	}
 257
 258	/* set the address, index & direction (write to PHY) */
 259	phy_id &= dev->mii.phy_id_mask;
 260	idx &= dev->mii.reg_num_mask;
 261	addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 262		| ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 263		| MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 264	ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 265	if (ret < 0) {
 266		netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 267		goto done;
 268	}
 269
 270	ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 271	if (ret < 0) {
 272		netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 273		goto done;
 274	}
 275
 276done:
 277	mutex_unlock(&dev->phy_mutex);
 278}
 279
 280static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 281				   int idx)
 282{
 283	return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 284}
 285
 286static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 287				     int idx, int regval)
 288{
 289	__smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 290}
 291
 292static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 293{
 294	return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 295}
 296
 297static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 298				int regval)
 299{
 300	__smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 301}
 302
 303static int smsc75xx_wait_eeprom(struct usbnet *dev)
 304{
 305	unsigned long start_time = jiffies;
 306	u32 val;
 307	int ret;
 308
 309	do {
 310		ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 311		if (ret < 0) {
 312			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 313			return ret;
 314		}
 315
 316		if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 317			break;
 318		udelay(40);
 319	} while (!time_after(jiffies, start_time + HZ));
 320
 321	if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 322		netdev_warn(dev->net, "EEPROM read operation timeout\n");
 323		return -EIO;
 324	}
 325
 326	return 0;
 327}
 328
 329static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 330{
 331	unsigned long start_time = jiffies;
 332	u32 val;
 333	int ret;
 334
 335	do {
 336		ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 337		if (ret < 0) {
 338			netdev_warn(dev->net, "Error reading E2P_CMD\n");
 339			return ret;
 340		}
 341
 342		if (!(val & E2P_CMD_BUSY))
 343			return 0;
 344
 345		udelay(40);
 346	} while (!time_after(jiffies, start_time + HZ));
 347
 348	netdev_warn(dev->net, "EEPROM is busy\n");
 349	return -EIO;
 350}
 351
 352static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 353				u8 *data)
 354{
 355	u32 val;
 356	int i, ret;
 357
 358	BUG_ON(!dev);
 359	BUG_ON(!data);
 360
 361	ret = smsc75xx_eeprom_confirm_not_busy(dev);
 362	if (ret)
 363		return ret;
 364
 365	for (i = 0; i < length; i++) {
 366		val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 367		ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 368		if (ret < 0) {
 369			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 370			return ret;
 371		}
 372
 373		ret = smsc75xx_wait_eeprom(dev);
 374		if (ret < 0)
 375			return ret;
 376
 377		ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 378		if (ret < 0) {
 379			netdev_warn(dev->net, "Error reading E2P_DATA\n");
 380			return ret;
 381		}
 382
 383		data[i] = val & 0xFF;
 384		offset++;
 385	}
 386
 387	return 0;
 388}
 389
 390static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 391				 u8 *data)
 392{
 393	u32 val;
 394	int i, ret;
 395
 396	BUG_ON(!dev);
 397	BUG_ON(!data);
 398
 399	ret = smsc75xx_eeprom_confirm_not_busy(dev);
 400	if (ret)
 401		return ret;
 402
 403	/* Issue write/erase enable command */
 404	val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 405	ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 406	if (ret < 0) {
 407		netdev_warn(dev->net, "Error writing E2P_CMD\n");
 408		return ret;
 409	}
 410
 411	ret = smsc75xx_wait_eeprom(dev);
 412	if (ret < 0)
 413		return ret;
 414
 415	for (i = 0; i < length; i++) {
 416
 417		/* Fill data register */
 418		val = data[i];
 419		ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 420		if (ret < 0) {
 421			netdev_warn(dev->net, "Error writing E2P_DATA\n");
 422			return ret;
 423		}
 424
 425		/* Send "write" command */
 426		val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 427		ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 428		if (ret < 0) {
 429			netdev_warn(dev->net, "Error writing E2P_CMD\n");
 430			return ret;
 431		}
 432
 433		ret = smsc75xx_wait_eeprom(dev);
 434		if (ret < 0)
 435			return ret;
 436
 437		offset++;
 438	}
 439
 440	return 0;
 441}
 442
 443static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 444{
 445	int i, ret;
 446
 447	for (i = 0; i < 100; i++) {
 448		u32 dp_sel;
 449		ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 450		if (ret < 0) {
 451			netdev_warn(dev->net, "Error reading DP_SEL\n");
 452			return ret;
 453		}
 454
 455		if (dp_sel & DP_SEL_DPRDY)
 456			return 0;
 457
 458		udelay(40);
 459	}
 460
 461	netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 462
 463	return -EIO;
 464}
 465
 466static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 467				   u32 length, u32 *buf)
 468{
 469	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 470	u32 dp_sel;
 471	int i, ret;
 472
 473	mutex_lock(&pdata->dataport_mutex);
 474
 475	ret = smsc75xx_dataport_wait_not_busy(dev);
 476	if (ret < 0) {
 477		netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 478		goto done;
 479	}
 480
 481	ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 482	if (ret < 0) {
 483		netdev_warn(dev->net, "Error reading DP_SEL\n");
 484		goto done;
 485	}
 486
 487	dp_sel &= ~DP_SEL_RSEL;
 488	dp_sel |= ram_select;
 489	ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 490	if (ret < 0) {
 491		netdev_warn(dev->net, "Error writing DP_SEL\n");
 492		goto done;
 493	}
 494
 495	for (i = 0; i < length; i++) {
 496		ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 497		if (ret < 0) {
 498			netdev_warn(dev->net, "Error writing DP_ADDR\n");
 499			goto done;
 500		}
 501
 502		ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 503		if (ret < 0) {
 504			netdev_warn(dev->net, "Error writing DP_DATA\n");
 505			goto done;
 506		}
 507
 508		ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 509		if (ret < 0) {
 510			netdev_warn(dev->net, "Error writing DP_CMD\n");
 511			goto done;
 512		}
 513
 514		ret = smsc75xx_dataport_wait_not_busy(dev);
 515		if (ret < 0) {
 516			netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 517			goto done;
 518		}
 519	}
 520
 521done:
 522	mutex_unlock(&pdata->dataport_mutex);
 523	return ret;
 524}
 525
 526/* returns hash bit number for given MAC address */
 527static u32 smsc75xx_hash(char addr[ETH_ALEN])
 528{
 529	return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 530}
 531
 532static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 533{
 534	struct smsc75xx_priv *pdata =
 535		container_of(param, struct smsc75xx_priv, set_multicast);
 536	struct usbnet *dev = pdata->dev;
 537	int ret;
 538
 539	netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 540		  pdata->rfe_ctl);
 541
 542	smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 543		DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 544
 545	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 546	if (ret < 0)
 547		netdev_warn(dev->net, "Error writing RFE_CRL\n");
 548}
 549
 550static void smsc75xx_set_multicast(struct net_device *netdev)
 551{
 552	struct usbnet *dev = netdev_priv(netdev);
 553	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 554	unsigned long flags;
 555	int i;
 556
 557	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 558
 559	pdata->rfe_ctl &=
 560		~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 561	pdata->rfe_ctl |= RFE_CTL_AB;
 562
 563	for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 564		pdata->multicast_hash_table[i] = 0;
 565
 566	if (dev->net->flags & IFF_PROMISC) {
 567		netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 568		pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 569	} else if (dev->net->flags & IFF_ALLMULTI) {
 570		netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 571		pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 572	} else if (!netdev_mc_empty(dev->net)) {
 573		struct netdev_hw_addr *ha;
 574
 575		netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 576
 577		pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 578
 579		netdev_for_each_mc_addr(ha, netdev) {
 580			u32 bitnum = smsc75xx_hash(ha->addr);
 581			pdata->multicast_hash_table[bitnum / 32] |=
 582				(1 << (bitnum % 32));
 583		}
 584	} else {
 585		netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 586		pdata->rfe_ctl |= RFE_CTL_DPF;
 587	}
 588
 589	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 590
 591	/* defer register writes to a sleepable context */
 592	schedule_work(&pdata->set_multicast);
 593}
 594
 595static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 596					    u16 lcladv, u16 rmtadv)
 597{
 598	u32 flow = 0, fct_flow = 0;
 599	int ret;
 600
 601	if (duplex == DUPLEX_FULL) {
 602		u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 603
 604		if (cap & FLOW_CTRL_TX) {
 605			flow = (FLOW_TX_FCEN | 0xFFFF);
 606			/* set fct_flow thresholds to 20% and 80% */
 607			fct_flow = (8 << 8) | 32;
 608		}
 609
 610		if (cap & FLOW_CTRL_RX)
 611			flow |= FLOW_RX_FCEN;
 612
 613		netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 614			  (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 615			  (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 616	} else {
 617		netif_dbg(dev, link, dev->net, "half duplex\n");
 618	}
 619
 620	ret = smsc75xx_write_reg(dev, FLOW, flow);
 621	if (ret < 0) {
 622		netdev_warn(dev->net, "Error writing FLOW\n");
 623		return ret;
 624	}
 625
 626	ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 627	if (ret < 0) {
 628		netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 629		return ret;
 630	}
 631
 632	return 0;
 633}
 634
 635static int smsc75xx_link_reset(struct usbnet *dev)
 636{
 637	struct mii_if_info *mii = &dev->mii;
 638	struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 639	u16 lcladv, rmtadv;
 640	int ret;
 641
 642	/* write to clear phy interrupt status */
 643	smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 644		PHY_INT_SRC_CLEAR_ALL);
 645
 646	ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 647	if (ret < 0) {
 648		netdev_warn(dev->net, "Error writing INT_STS\n");
 649		return ret;
 650	}
 651
 652	mii_check_media(mii, 1, 1);
 653	mii_ethtool_gset(&dev->mii, &ecmd);
 654	lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 655	rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 656
 657	netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 658		  ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 659
 660	return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 661}
 662
 663static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 664{
 665	u32 intdata;
 666
 667	if (urb->actual_length != 4) {
 668		netdev_warn(dev->net, "unexpected urb length %d\n",
 669			    urb->actual_length);
 670		return;
 671	}
 672
 673	memcpy(&intdata, urb->transfer_buffer, 4);
 674	le32_to_cpus(&intdata);
 675
 676	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 677
 678	if (intdata & INT_ENP_PHY_INT)
 679		usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 680	else
 681		netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 682			    intdata);
 683}
 684
 685static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 686{
 687	return MAX_EEPROM_SIZE;
 688}
 689
 690static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 691				       struct ethtool_eeprom *ee, u8 *data)
 692{
 693	struct usbnet *dev = netdev_priv(netdev);
 694
 695	ee->magic = LAN75XX_EEPROM_MAGIC;
 696
 697	return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 698}
 699
 700static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 701				       struct ethtool_eeprom *ee, u8 *data)
 702{
 703	struct usbnet *dev = netdev_priv(netdev);
 704
 705	if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 706		netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 707			    ee->magic);
 708		return -EINVAL;
 709	}
 710
 711	return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 712}
 713
 714static void smsc75xx_ethtool_get_wol(struct net_device *net,
 715				     struct ethtool_wolinfo *wolinfo)
 716{
 717	struct usbnet *dev = netdev_priv(net);
 718	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 719
 720	wolinfo->supported = SUPPORTED_WAKE;
 721	wolinfo->wolopts = pdata->wolopts;
 722}
 723
 724static int smsc75xx_ethtool_set_wol(struct net_device *net,
 725				    struct ethtool_wolinfo *wolinfo)
 726{
 727	struct usbnet *dev = netdev_priv(net);
 728	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 729	int ret;
 730
 731	pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 732
 733	ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 734	if (ret < 0)
 735		netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 736
 737	return ret;
 738}
 739
 740static const struct ethtool_ops smsc75xx_ethtool_ops = {
 741	.get_link	= usbnet_get_link,
 742	.nway_reset	= usbnet_nway_reset,
 743	.get_drvinfo	= usbnet_get_drvinfo,
 744	.get_msglevel	= usbnet_get_msglevel,
 745	.set_msglevel	= usbnet_set_msglevel,
 
 
 746	.get_eeprom_len	= smsc75xx_ethtool_get_eeprom_len,
 747	.get_eeprom	= smsc75xx_ethtool_get_eeprom,
 748	.set_eeprom	= smsc75xx_ethtool_set_eeprom,
 749	.get_wol	= smsc75xx_ethtool_get_wol,
 750	.set_wol	= smsc75xx_ethtool_set_wol,
 751	.get_link_ksettings	= usbnet_get_link_ksettings,
 752	.set_link_ksettings	= usbnet_set_link_ksettings,
 753};
 754
 755static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 756{
 757	struct usbnet *dev = netdev_priv(netdev);
 758
 759	if (!netif_running(netdev))
 760		return -EINVAL;
 761
 762	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 763}
 764
 765static void smsc75xx_init_mac_address(struct usbnet *dev)
 766{
 767	const u8 *mac_addr;
 768
 769	/* maybe the boot loader passed the MAC address in devicetree */
 770	mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 771	if (mac_addr) {
 772		memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 773		return;
 774	}
 775
 776	/* try reading mac address from EEPROM */
 777	if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 778			dev->net->dev_addr) == 0) {
 779		if (is_valid_ether_addr(dev->net->dev_addr)) {
 780			/* eeprom values are valid so use them */
 781			netif_dbg(dev, ifup, dev->net,
 782				  "MAC address read from EEPROM\n");
 783			return;
 784		}
 785	}
 786
 787	/* no useful static MAC address found. generate a random one */
 788	eth_hw_addr_random(dev->net);
 789	netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 790}
 791
 792static int smsc75xx_set_mac_address(struct usbnet *dev)
 793{
 794	u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 795		dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 796	u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 797
 798	int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 799	if (ret < 0) {
 800		netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 801		return ret;
 802	}
 803
 804	ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 805	if (ret < 0) {
 806		netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 807		return ret;
 808	}
 809
 810	addr_hi |= ADDR_FILTX_FB_VALID;
 811	ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 812	if (ret < 0) {
 813		netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 814		return ret;
 815	}
 816
 817	ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 818	if (ret < 0)
 819		netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 820
 821	return ret;
 822}
 823
 824static int smsc75xx_phy_initialize(struct usbnet *dev)
 825{
 826	int bmcr, ret, timeout = 0;
 827
 828	/* Initialize MII structure */
 829	dev->mii.dev = dev->net;
 830	dev->mii.mdio_read = smsc75xx_mdio_read;
 831	dev->mii.mdio_write = smsc75xx_mdio_write;
 832	dev->mii.phy_id_mask = 0x1f;
 833	dev->mii.reg_num_mask = 0x1f;
 834	dev->mii.supports_gmii = 1;
 835	dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 836
 837	/* reset phy and wait for reset to complete */
 838	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 839
 840	do {
 841		msleep(10);
 842		bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 843		if (bmcr < 0) {
 844			netdev_warn(dev->net, "Error reading MII_BMCR\n");
 845			return bmcr;
 846		}
 847		timeout++;
 848	} while ((bmcr & BMCR_RESET) && (timeout < 100));
 849
 850	if (timeout >= 100) {
 851		netdev_warn(dev->net, "timeout on PHY Reset\n");
 852		return -EIO;
 853	}
 854
 855	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 856		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 857		ADVERTISE_PAUSE_ASYM);
 858	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 859		ADVERTISE_1000FULL);
 860
 861	/* read and write to clear phy interrupt status */
 862	ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 863	if (ret < 0) {
 864		netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 865		return ret;
 866	}
 867
 868	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 869
 870	smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 871		PHY_INT_MASK_DEFAULT);
 872	mii_nway_restart(&dev->mii);
 873
 874	netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 875	return 0;
 876}
 877
 878static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 879{
 880	int ret = 0;
 881	u32 buf;
 882	bool rxenabled;
 883
 884	ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 885	if (ret < 0) {
 886		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 887		return ret;
 888	}
 889
 890	rxenabled = ((buf & MAC_RX_RXEN) != 0);
 891
 892	if (rxenabled) {
 893		buf &= ~MAC_RX_RXEN;
 894		ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 895		if (ret < 0) {
 896			netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 897			return ret;
 898		}
 899	}
 900
 901	/* add 4 to size for FCS */
 902	buf &= ~MAC_RX_MAX_SIZE;
 903	buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 904
 905	ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 906	if (ret < 0) {
 907		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 908		return ret;
 909	}
 910
 911	if (rxenabled) {
 912		buf |= MAC_RX_RXEN;
 913		ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 914		if (ret < 0) {
 915			netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 916			return ret;
 917		}
 918	}
 919
 920	return 0;
 921}
 922
 923static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 924{
 925	struct usbnet *dev = netdev_priv(netdev);
 926	int ret;
 927
 
 
 
 928	ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 929	if (ret < 0) {
 930		netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 931		return ret;
 932	}
 933
 934	return usbnet_change_mtu(netdev, new_mtu);
 935}
 936
 937/* Enable or disable Rx checksum offload engine */
 938static int smsc75xx_set_features(struct net_device *netdev,
 939	netdev_features_t features)
 940{
 941	struct usbnet *dev = netdev_priv(netdev);
 942	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 943	unsigned long flags;
 944	int ret;
 945
 946	spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 947
 948	if (features & NETIF_F_RXCSUM)
 949		pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 950	else
 951		pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 952
 953	spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 954	/* it's racing here! */
 955
 956	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 957	if (ret < 0) {
 958		netdev_warn(dev->net, "Error writing RFE_CTL\n");
 959		return ret;
 960	}
 961	return 0;
 962}
 963
 964static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 965{
 966	int timeout = 0;
 967
 968	do {
 969		u32 buf;
 970		int ret;
 971
 972		ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 973
 974		if (ret < 0) {
 975			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 976			return ret;
 977		}
 978
 979		if (buf & PMT_CTL_DEV_RDY)
 980			return 0;
 981
 982		msleep(10);
 983		timeout++;
 984	} while (timeout < 100);
 985
 986	netdev_warn(dev->net, "timeout waiting for device ready\n");
 987	return -EIO;
 988}
 989
 990static int smsc75xx_reset(struct usbnet *dev)
 991{
 992	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 993	u32 buf;
 994	int ret = 0, timeout;
 995
 996	netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 997
 998	ret = smsc75xx_wait_ready(dev, 0);
 999	if (ret < 0) {
1000		netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1001		return ret;
1002	}
1003
1004	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1005	if (ret < 0) {
1006		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1007		return ret;
1008	}
1009
1010	buf |= HW_CFG_LRST;
1011
1012	ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1013	if (ret < 0) {
1014		netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1015		return ret;
1016	}
1017
1018	timeout = 0;
1019	do {
1020		msleep(10);
1021		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1022		if (ret < 0) {
1023			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1024			return ret;
1025		}
1026		timeout++;
1027	} while ((buf & HW_CFG_LRST) && (timeout < 100));
1028
1029	if (timeout >= 100) {
1030		netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1031		return -EIO;
1032	}
1033
1034	netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1035
1036	ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1037	if (ret < 0) {
1038		netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1039		return ret;
1040	}
1041
1042	buf |= PMT_CTL_PHY_RST;
1043
1044	ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1045	if (ret < 0) {
1046		netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1047		return ret;
1048	}
1049
1050	timeout = 0;
1051	do {
1052		msleep(10);
1053		ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1054		if (ret < 0) {
1055			netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1056			return ret;
1057		}
1058		timeout++;
1059	} while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1060
1061	if (timeout >= 100) {
1062		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1063		return -EIO;
1064	}
1065
1066	netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1067
1068	ret = smsc75xx_set_mac_address(dev);
1069	if (ret < 0) {
1070		netdev_warn(dev->net, "Failed to set mac address\n");
1071		return ret;
1072	}
1073
1074	netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1075		  dev->net->dev_addr);
1076
1077	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1078	if (ret < 0) {
1079		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1080		return ret;
1081	}
1082
1083	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1084		  buf);
1085
1086	buf |= HW_CFG_BIR;
1087
1088	ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1089	if (ret < 0) {
1090		netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1091		return ret;
1092	}
1093
1094	ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1095	if (ret < 0) {
1096		netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1097		return ret;
1098	}
1099
1100	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1101		  buf);
1102
1103	if (!turbo_mode) {
1104		buf = 0;
1105		dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1106	} else if (dev->udev->speed == USB_SPEED_HIGH) {
1107		buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1108		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1109	} else {
1110		buf = 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 = smsc75xx_write_reg(dev, BURST_CAP, buf);
1118	if (ret < 0) {
1119		netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1120		return ret;
1121	}
1122
1123	ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1124	if (ret < 0) {
1125		netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1126		return ret;
1127	}
1128
1129	netif_dbg(dev, ifup, dev->net,
1130		  "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1131
1132	ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1133	if (ret < 0) {
1134		netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1135		return ret;
1136	}
1137
1138	ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1139	if (ret < 0) {
1140		netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1141		return ret;
1142	}
1143
1144	netif_dbg(dev, ifup, dev->net,
1145		  "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1146
1147	if (turbo_mode) {
1148		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1149		if (ret < 0) {
1150			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1151			return ret;
1152		}
1153
1154		netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1155
1156		buf |= (HW_CFG_MEF | HW_CFG_BCE);
1157
1158		ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1159		if (ret < 0) {
1160			netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1161			return ret;
1162		}
1163
1164		ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1165		if (ret < 0) {
1166			netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1167			return ret;
1168		}
1169
1170		netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1171	}
1172
1173	/* set FIFO sizes */
1174	buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1175	ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1176	if (ret < 0) {
1177		netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1178		return ret;
1179	}
1180
1181	netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1182
1183	buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1184	ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1185	if (ret < 0) {
1186		netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1187		return ret;
1188	}
1189
1190	netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1191
1192	ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1193	if (ret < 0) {
1194		netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1195		return ret;
1196	}
1197
1198	ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1199	if (ret < 0) {
1200		netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1201		return ret;
1202	}
1203
1204	netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1205
1206	ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1207	if (ret < 0) {
1208		netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1209		return ret;
1210	}
1211
1212	/* only set default GPIO/LED settings if no EEPROM is detected */
1213	if (!(buf & E2P_CMD_LOADED)) {
1214		ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1215		if (ret < 0) {
1216			netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1217			return ret;
1218		}
1219
1220		buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1221		buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1222
1223		ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1224		if (ret < 0) {
1225			netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1226			return ret;
1227		}
1228	}
1229
1230	ret = smsc75xx_write_reg(dev, FLOW, 0);
1231	if (ret < 0) {
1232		netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1233		return ret;
1234	}
1235
1236	ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1237	if (ret < 0) {
1238		netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1239		return ret;
1240	}
1241
1242	/* Don't need rfe_ctl_lock during initialisation */
1243	ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1244	if (ret < 0) {
1245		netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1246		return ret;
1247	}
1248
1249	pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1250
1251	ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1252	if (ret < 0) {
1253		netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1254		return ret;
1255	}
1256
1257	ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1258	if (ret < 0) {
1259		netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1260		return ret;
1261	}
1262
1263	netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1264		  pdata->rfe_ctl);
1265
1266	/* Enable or disable checksum offload engines */
1267	smsc75xx_set_features(dev->net, dev->net->features);
1268
1269	smsc75xx_set_multicast(dev->net);
1270
1271	ret = smsc75xx_phy_initialize(dev);
1272	if (ret < 0) {
1273		netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1274		return ret;
1275	}
1276
1277	ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1278	if (ret < 0) {
1279		netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1280		return ret;
1281	}
1282
1283	/* enable PHY interrupts */
1284	buf |= INT_ENP_PHY_INT;
1285
1286	ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1287	if (ret < 0) {
1288		netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1289		return ret;
1290	}
1291
1292	/* allow mac to detect speed and duplex from phy */
1293	ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1294	if (ret < 0) {
1295		netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1296		return ret;
1297	}
1298
1299	buf |= (MAC_CR_ADD | MAC_CR_ASD);
1300	ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1301	if (ret < 0) {
1302		netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1303		return ret;
1304	}
1305
1306	ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1307	if (ret < 0) {
1308		netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1309		return ret;
1310	}
1311
1312	buf |= MAC_TX_TXEN;
1313
1314	ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1315	if (ret < 0) {
1316		netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1317		return ret;
1318	}
1319
1320	netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1321
1322	ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1323	if (ret < 0) {
1324		netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1325		return ret;
1326	}
1327
1328	buf |= FCT_TX_CTL_EN;
1329
1330	ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1331	if (ret < 0) {
1332		netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1333		return ret;
1334	}
1335
1336	netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1337
1338	ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1339	if (ret < 0) {
1340		netdev_warn(dev->net, "Failed to set max rx frame length\n");
1341		return ret;
1342	}
1343
1344	ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1345	if (ret < 0) {
1346		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1347		return ret;
1348	}
1349
1350	buf |= MAC_RX_RXEN;
1351
1352	ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1353	if (ret < 0) {
1354		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1355		return ret;
1356	}
1357
1358	netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1359
1360	ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1361	if (ret < 0) {
1362		netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1363		return ret;
1364	}
1365
1366	buf |= FCT_RX_CTL_EN;
1367
1368	ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1369	if (ret < 0) {
1370		netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1371		return ret;
1372	}
1373
1374	netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1375
1376	netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1377	return 0;
1378}
1379
1380static const struct net_device_ops smsc75xx_netdev_ops = {
1381	.ndo_open		= usbnet_open,
1382	.ndo_stop		= usbnet_stop,
1383	.ndo_start_xmit		= usbnet_start_xmit,
1384	.ndo_tx_timeout		= usbnet_tx_timeout,
1385	.ndo_get_stats64	= usbnet_get_stats64,
1386	.ndo_change_mtu		= smsc75xx_change_mtu,
1387	.ndo_set_mac_address 	= eth_mac_addr,
1388	.ndo_validate_addr	= eth_validate_addr,
1389	.ndo_do_ioctl 		= smsc75xx_ioctl,
1390	.ndo_set_rx_mode	= smsc75xx_set_multicast,
1391	.ndo_set_features	= smsc75xx_set_features,
1392};
1393
1394static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1395{
1396	struct smsc75xx_priv *pdata = NULL;
1397	int ret;
1398
1399	printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1400
1401	ret = usbnet_get_endpoints(dev, intf);
1402	if (ret < 0) {
1403		netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1404		return ret;
1405	}
1406
1407	dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1408					      GFP_KERNEL);
1409
1410	pdata = (struct smsc75xx_priv *)(dev->data[0]);
1411	if (!pdata)
1412		return -ENOMEM;
1413
1414	pdata->dev = dev;
1415
1416	spin_lock_init(&pdata->rfe_ctl_lock);
1417	mutex_init(&pdata->dataport_mutex);
1418
1419	INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1420
1421	if (DEFAULT_TX_CSUM_ENABLE)
1422		dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1423
1424	if (DEFAULT_RX_CSUM_ENABLE)
1425		dev->net->features |= NETIF_F_RXCSUM;
1426
1427	dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1428				NETIF_F_RXCSUM;
1429
1430	ret = smsc75xx_wait_ready(dev, 0);
1431	if (ret < 0) {
1432		netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1433		return ret;
1434	}
1435
1436	smsc75xx_init_mac_address(dev);
1437
1438	/* Init all registers */
1439	ret = smsc75xx_reset(dev);
1440	if (ret < 0) {
1441		netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1442		return ret;
1443	}
1444
1445	dev->net->netdev_ops = &smsc75xx_netdev_ops;
1446	dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1447	dev->net->flags |= IFF_MULTICAST;
1448	dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1449	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1450	dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1451	return 0;
1452}
1453
1454static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1455{
1456	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1457	if (pdata) {
1458		netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1459		kfree(pdata);
1460		pdata = NULL;
1461		dev->data[0] = 0;
1462	}
1463}
1464
1465static u16 smsc_crc(const u8 *buffer, size_t len)
1466{
1467	return bitrev16(crc16(0xFFFF, buffer, len));
1468}
1469
1470static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1471			       u32 wuf_mask1)
1472{
1473	int cfg_base = WUF_CFGX + filter * 4;
1474	int mask_base = WUF_MASKX + filter * 16;
1475	int ret;
1476
1477	ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1478	if (ret < 0) {
1479		netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1480		return ret;
1481	}
1482
1483	ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1484	if (ret < 0) {
1485		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1486		return ret;
1487	}
1488
1489	ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1490	if (ret < 0) {
1491		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1492		return ret;
1493	}
1494
1495	ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1496	if (ret < 0) {
1497		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1498		return ret;
1499	}
1500
1501	ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1502	if (ret < 0) {
1503		netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1504		return ret;
1505	}
1506
1507	return 0;
1508}
1509
1510static int smsc75xx_enter_suspend0(struct usbnet *dev)
1511{
1512	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1513	u32 val;
1514	int ret;
1515
1516	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1517	if (ret < 0) {
1518		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1519		return ret;
1520	}
1521
1522	val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1523	val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1524
1525	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1526	if (ret < 0) {
1527		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1528		return ret;
1529	}
1530
1531	pdata->suspend_flags |= SUSPEND_SUSPEND0;
1532
1533	return 0;
1534}
1535
1536static int smsc75xx_enter_suspend1(struct usbnet *dev)
1537{
1538	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1539	u32 val;
1540	int ret;
1541
1542	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1543	if (ret < 0) {
1544		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1545		return ret;
1546	}
1547
1548	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1549	val |= PMT_CTL_SUS_MODE_1;
1550
1551	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1552	if (ret < 0) {
1553		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1554		return ret;
1555	}
1556
1557	/* clear wol status, enable energy detection */
1558	val &= ~PMT_CTL_WUPS;
1559	val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1560
1561	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1562	if (ret < 0) {
1563		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1564		return ret;
1565	}
1566
1567	pdata->suspend_flags |= SUSPEND_SUSPEND1;
1568
1569	return 0;
1570}
1571
1572static int smsc75xx_enter_suspend2(struct usbnet *dev)
1573{
1574	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1575	u32 val;
1576	int ret;
1577
1578	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1579	if (ret < 0) {
1580		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1581		return ret;
1582	}
1583
1584	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1585	val |= PMT_CTL_SUS_MODE_2;
1586
1587	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1588	if (ret < 0) {
1589		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1590		return ret;
1591	}
1592
1593	pdata->suspend_flags |= SUSPEND_SUSPEND2;
1594
1595	return 0;
1596}
1597
1598static int smsc75xx_enter_suspend3(struct usbnet *dev)
1599{
1600	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1601	u32 val;
1602	int ret;
1603
1604	ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1605	if (ret < 0) {
1606		netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1607		return ret;
1608	}
1609
1610	if (val & FCT_RX_CTL_RXUSED) {
1611		netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1612		return -EBUSY;
1613	}
1614
1615	ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1616	if (ret < 0) {
1617		netdev_warn(dev->net, "Error reading PMT_CTL\n");
1618		return ret;
1619	}
1620
1621	val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1622	val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1623
1624	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1625	if (ret < 0) {
1626		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1627		return ret;
1628	}
1629
1630	/* clear wol status */
1631	val &= ~PMT_CTL_WUPS;
1632	val |= PMT_CTL_WUPS_WOL;
1633
1634	ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1635	if (ret < 0) {
1636		netdev_warn(dev->net, "Error writing PMT_CTL\n");
1637		return ret;
1638	}
1639
1640	pdata->suspend_flags |= SUSPEND_SUSPEND3;
1641
1642	return 0;
1643}
1644
1645static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1646{
1647	struct mii_if_info *mii = &dev->mii;
1648	int ret;
1649
1650	netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1651
1652	/* read to clear */
1653	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1654	if (ret < 0) {
1655		netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1656		return ret;
1657	}
1658
1659	/* enable interrupt source */
1660	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1661	if (ret < 0) {
1662		netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1663		return ret;
1664	}
1665
1666	ret |= mask;
1667
1668	smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1669
1670	return 0;
1671}
1672
1673static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1674{
1675	struct mii_if_info *mii = &dev->mii;
1676	int ret;
1677
1678	/* first, a dummy read, needed to latch some MII phys */
1679	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1680	if (ret < 0) {
1681		netdev_warn(dev->net, "Error reading MII_BMSR\n");
1682		return ret;
1683	}
1684
1685	ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1686	if (ret < 0) {
1687		netdev_warn(dev->net, "Error reading MII_BMSR\n");
1688		return ret;
1689	}
1690
1691	return !!(ret & BMSR_LSTATUS);
1692}
1693
1694static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1695{
1696	int ret;
1697
1698	if (!netif_running(dev->net)) {
1699		/* interface is ifconfig down so fully power down hw */
1700		netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1701		return smsc75xx_enter_suspend2(dev);
1702	}
1703
1704	if (!link_up) {
1705		/* link is down so enter EDPD mode */
1706		netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1707
1708		/* enable PHY wakeup events for if cable is attached */
1709		ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1710			PHY_INT_MASK_ANEG_COMP);
1711		if (ret < 0) {
1712			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1713			return ret;
1714		}
1715
1716		netdev_info(dev->net, "entering SUSPEND1 mode\n");
1717		return smsc75xx_enter_suspend1(dev);
1718	}
1719
1720	/* enable PHY wakeup events so we remote wakeup if cable is pulled */
1721	ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1722		PHY_INT_MASK_LINK_DOWN);
1723	if (ret < 0) {
1724		netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1725		return ret;
1726	}
1727
1728	netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1729	return smsc75xx_enter_suspend3(dev);
1730}
1731
1732static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1733{
1734	struct usbnet *dev = usb_get_intfdata(intf);
1735	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1736	u32 val, link_up;
1737	int ret;
1738
1739	ret = usbnet_suspend(intf, message);
1740	if (ret < 0) {
1741		netdev_warn(dev->net, "usbnet_suspend error\n");
1742		return ret;
1743	}
1744
1745	if (pdata->suspend_flags) {
1746		netdev_warn(dev->net, "error during last resume\n");
1747		pdata->suspend_flags = 0;
1748	}
1749
1750	/* determine if link is up using only _nopm functions */
1751	link_up = smsc75xx_link_ok_nopm(dev);
1752
1753	if (message.event == PM_EVENT_AUTO_SUSPEND) {
1754		ret = smsc75xx_autosuspend(dev, link_up);
1755		goto done;
1756	}
1757
1758	/* if we get this far we're not autosuspending */
1759	/* if no wol options set, or if link is down and we're not waking on
1760	 * PHY activity, enter lowest power SUSPEND2 mode
1761	 */
1762	if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1763		!(link_up || (pdata->wolopts & WAKE_PHY))) {
1764		netdev_info(dev->net, "entering SUSPEND2 mode\n");
1765
1766		/* disable energy detect (link up) & wake up events */
1767		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1768		if (ret < 0) {
1769			netdev_warn(dev->net, "Error reading WUCSR\n");
1770			goto done;
1771		}
1772
1773		val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1774
1775		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1776		if (ret < 0) {
1777			netdev_warn(dev->net, "Error writing WUCSR\n");
1778			goto done;
1779		}
1780
1781		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1782		if (ret < 0) {
1783			netdev_warn(dev->net, "Error reading PMT_CTL\n");
1784			goto done;
1785		}
1786
1787		val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1788
1789		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1790		if (ret < 0) {
1791			netdev_warn(dev->net, "Error writing PMT_CTL\n");
1792			goto done;
1793		}
1794
1795		ret = smsc75xx_enter_suspend2(dev);
1796		goto done;
1797	}
1798
1799	if (pdata->wolopts & WAKE_PHY) {
1800		ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1801			(PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1802		if (ret < 0) {
1803			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1804			goto done;
1805		}
1806
1807		/* if link is down then configure EDPD and enter SUSPEND1,
1808		 * otherwise enter SUSPEND0 below
1809		 */
1810		if (!link_up) {
1811			struct mii_if_info *mii = &dev->mii;
1812			netdev_info(dev->net, "entering SUSPEND1 mode\n");
1813
1814			/* enable energy detect power-down mode */
1815			ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1816				PHY_MODE_CTRL_STS);
1817			if (ret < 0) {
1818				netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1819				goto done;
1820			}
1821
1822			ret |= MODE_CTRL_STS_EDPWRDOWN;
1823
1824			smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1825				PHY_MODE_CTRL_STS, ret);
1826
1827			/* enter SUSPEND1 mode */
1828			ret = smsc75xx_enter_suspend1(dev);
1829			goto done;
1830		}
1831	}
1832
1833	if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1834		int i, filter = 0;
1835
1836		/* disable all filters */
1837		for (i = 0; i < WUF_NUM; i++) {
1838			ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1839			if (ret < 0) {
1840				netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1841				goto done;
1842			}
1843		}
1844
1845		if (pdata->wolopts & WAKE_MCAST) {
1846			const u8 mcast[] = {0x01, 0x00, 0x5E};
1847			netdev_info(dev->net, "enabling multicast detection\n");
1848
1849			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1850				| smsc_crc(mcast, 3);
1851			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1852			if (ret < 0) {
1853				netdev_warn(dev->net, "Error writing wakeup filter\n");
1854				goto done;
1855			}
1856		}
1857
1858		if (pdata->wolopts & WAKE_ARP) {
1859			const u8 arp[] = {0x08, 0x06};
1860			netdev_info(dev->net, "enabling ARP detection\n");
1861
1862			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1863				| smsc_crc(arp, 2);
1864			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1865			if (ret < 0) {
1866				netdev_warn(dev->net, "Error writing wakeup filter\n");
1867				goto done;
1868			}
1869		}
1870
1871		/* clear any pending pattern match packet status */
1872		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1873		if (ret < 0) {
1874			netdev_warn(dev->net, "Error reading WUCSR\n");
1875			goto done;
1876		}
1877
1878		val |= WUCSR_WUFR;
1879
1880		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1881		if (ret < 0) {
1882			netdev_warn(dev->net, "Error writing WUCSR\n");
1883			goto done;
1884		}
1885
1886		netdev_info(dev->net, "enabling packet match detection\n");
1887		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1888		if (ret < 0) {
1889			netdev_warn(dev->net, "Error reading WUCSR\n");
1890			goto done;
1891		}
1892
1893		val |= WUCSR_WUEN;
1894
1895		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1896		if (ret < 0) {
1897			netdev_warn(dev->net, "Error writing WUCSR\n");
1898			goto done;
1899		}
1900	} else {
1901		netdev_info(dev->net, "disabling packet match detection\n");
1902		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1903		if (ret < 0) {
1904			netdev_warn(dev->net, "Error reading WUCSR\n");
1905			goto done;
1906		}
1907
1908		val &= ~WUCSR_WUEN;
1909
1910		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1911		if (ret < 0) {
1912			netdev_warn(dev->net, "Error writing WUCSR\n");
1913			goto done;
1914		}
1915	}
1916
1917	/* disable magic, bcast & unicast wakeup sources */
1918	ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1919	if (ret < 0) {
1920		netdev_warn(dev->net, "Error reading WUCSR\n");
1921		goto done;
1922	}
1923
1924	val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1925
1926	ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1927	if (ret < 0) {
1928		netdev_warn(dev->net, "Error writing WUCSR\n");
1929		goto done;
1930	}
1931
1932	if (pdata->wolopts & WAKE_PHY) {
1933		netdev_info(dev->net, "enabling PHY wakeup\n");
1934
1935		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1936		if (ret < 0) {
1937			netdev_warn(dev->net, "Error reading PMT_CTL\n");
1938			goto done;
1939		}
1940
1941		/* clear wol status, enable energy detection */
1942		val &= ~PMT_CTL_WUPS;
1943		val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1944
1945		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1946		if (ret < 0) {
1947			netdev_warn(dev->net, "Error writing PMT_CTL\n");
1948			goto done;
1949		}
1950	}
1951
1952	if (pdata->wolopts & WAKE_MAGIC) {
1953		netdev_info(dev->net, "enabling magic packet wakeup\n");
1954		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1955		if (ret < 0) {
1956			netdev_warn(dev->net, "Error reading WUCSR\n");
1957			goto done;
1958		}
1959
1960		/* clear any pending magic packet status */
1961		val |= WUCSR_MPR | WUCSR_MPEN;
1962
1963		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1964		if (ret < 0) {
1965			netdev_warn(dev->net, "Error writing WUCSR\n");
1966			goto done;
1967		}
1968	}
1969
1970	if (pdata->wolopts & WAKE_BCAST) {
1971		netdev_info(dev->net, "enabling broadcast detection\n");
1972		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1973		if (ret < 0) {
1974			netdev_warn(dev->net, "Error reading WUCSR\n");
1975			goto done;
1976		}
1977
1978		val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1979
1980		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1981		if (ret < 0) {
1982			netdev_warn(dev->net, "Error writing WUCSR\n");
1983			goto done;
1984		}
1985	}
1986
1987	if (pdata->wolopts & WAKE_UCAST) {
1988		netdev_info(dev->net, "enabling unicast detection\n");
1989		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1990		if (ret < 0) {
1991			netdev_warn(dev->net, "Error reading WUCSR\n");
1992			goto done;
1993		}
1994
1995		val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1996
1997		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1998		if (ret < 0) {
1999			netdev_warn(dev->net, "Error writing WUCSR\n");
2000			goto done;
2001		}
2002	}
2003
2004	/* enable receiver to enable frame reception */
2005	ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2006	if (ret < 0) {
2007		netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2008		goto done;
2009	}
2010
2011	val |= MAC_RX_RXEN;
2012
2013	ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2014	if (ret < 0) {
2015		netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2016		goto done;
2017	}
2018
2019	/* some wol options are enabled, so enter SUSPEND0 */
2020	netdev_info(dev->net, "entering SUSPEND0 mode\n");
2021	ret = smsc75xx_enter_suspend0(dev);
2022
2023done:
2024	/*
2025	 * TODO: resume() might need to handle the suspend failure
2026	 * in system sleep
2027	 */
2028	if (ret && PMSG_IS_AUTO(message))
2029		usbnet_resume(intf);
2030	return ret;
2031}
2032
2033static int smsc75xx_resume(struct usb_interface *intf)
2034{
2035	struct usbnet *dev = usb_get_intfdata(intf);
2036	struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2037	u8 suspend_flags = pdata->suspend_flags;
2038	int ret;
2039	u32 val;
2040
2041	netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2042
2043	/* do this first to ensure it's cleared even in error case */
2044	pdata->suspend_flags = 0;
2045
2046	if (suspend_flags & SUSPEND_ALLMODES) {
2047		/* Disable wakeup sources */
2048		ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2049		if (ret < 0) {
2050			netdev_warn(dev->net, "Error reading WUCSR\n");
2051			return ret;
2052		}
2053
2054		val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2055			| WUCSR_BCST_EN);
2056
2057		ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2058		if (ret < 0) {
2059			netdev_warn(dev->net, "Error writing WUCSR\n");
2060			return ret;
2061		}
2062
2063		/* clear wake-up status */
2064		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2065		if (ret < 0) {
2066			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2067			return ret;
2068		}
2069
2070		val &= ~PMT_CTL_WOL_EN;
2071		val |= PMT_CTL_WUPS;
2072
2073		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2074		if (ret < 0) {
2075			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2076			return ret;
2077		}
2078	}
2079
2080	if (suspend_flags & SUSPEND_SUSPEND2) {
2081		netdev_info(dev->net, "resuming from SUSPEND2\n");
2082
2083		ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2084		if (ret < 0) {
2085			netdev_warn(dev->net, "Error reading PMT_CTL\n");
2086			return ret;
2087		}
2088
2089		val |= PMT_CTL_PHY_PWRUP;
2090
2091		ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2092		if (ret < 0) {
2093			netdev_warn(dev->net, "Error writing PMT_CTL\n");
2094			return ret;
2095		}
2096	}
2097
2098	ret = smsc75xx_wait_ready(dev, 1);
2099	if (ret < 0) {
2100		netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2101		return ret;
2102	}
2103
2104	return usbnet_resume(intf);
2105}
2106
2107static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2108				     u32 rx_cmd_a, u32 rx_cmd_b)
2109{
2110	if (!(dev->net->features & NETIF_F_RXCSUM) ||
2111	    unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2112		skb->ip_summed = CHECKSUM_NONE;
2113	} else {
2114		skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2115		skb->ip_summed = CHECKSUM_COMPLETE;
2116	}
2117}
2118
2119static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2120{
2121	/* This check is no longer done by usbnet */
2122	if (skb->len < dev->net->hard_header_len)
2123		return 0;
2124
2125	while (skb->len > 0) {
2126		u32 rx_cmd_a, rx_cmd_b, align_count, size;
2127		struct sk_buff *ax_skb;
2128		unsigned char *packet;
2129
2130		memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2131		le32_to_cpus(&rx_cmd_a);
2132		skb_pull(skb, 4);
2133
2134		memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2135		le32_to_cpus(&rx_cmd_b);
2136		skb_pull(skb, 4 + RXW_PADDING);
2137
2138		packet = skb->data;
2139
2140		/* get the packet length */
2141		size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2142		align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2143
2144		if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2145			netif_dbg(dev, rx_err, dev->net,
2146				  "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2147			dev->net->stats.rx_errors++;
2148			dev->net->stats.rx_dropped++;
2149
2150			if (rx_cmd_a & RX_CMD_A_FCS)
2151				dev->net->stats.rx_crc_errors++;
2152			else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2153				dev->net->stats.rx_frame_errors++;
2154		} else {
2155			/* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2156			if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2157				netif_dbg(dev, rx_err, dev->net,
2158					  "size err rx_cmd_a=0x%08x\n",
2159					  rx_cmd_a);
2160				return 0;
2161			}
2162
2163			/* last frame in this batch */
2164			if (skb->len == size) {
2165				smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2166					rx_cmd_b);
2167
2168				skb_trim(skb, skb->len - 4); /* remove fcs */
2169				skb->truesize = size + sizeof(struct sk_buff);
2170
2171				return 1;
2172			}
2173
2174			ax_skb = skb_clone(skb, GFP_ATOMIC);
2175			if (unlikely(!ax_skb)) {
2176				netdev_warn(dev->net, "Error allocating skb\n");
2177				return 0;
2178			}
2179
2180			ax_skb->len = size;
2181			ax_skb->data = packet;
2182			skb_set_tail_pointer(ax_skb, size);
2183
2184			smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2185				rx_cmd_b);
2186
2187			skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2188			ax_skb->truesize = size + sizeof(struct sk_buff);
2189
2190			usbnet_skb_return(dev, ax_skb);
2191		}
2192
2193		skb_pull(skb, size);
2194
2195		/* padding bytes before the next frame starts */
2196		if (skb->len)
2197			skb_pull(skb, align_count);
2198	}
2199
2200	return 1;
2201}
2202
2203static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2204					 struct sk_buff *skb, gfp_t flags)
2205{
2206	u32 tx_cmd_a, tx_cmd_b;
2207
2208	if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
 
 
2209		dev_kfree_skb_any(skb);
2210		return NULL;
 
 
2211	}
2212
2213	tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2214
2215	if (skb->ip_summed == CHECKSUM_PARTIAL)
2216		tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2217
2218	if (skb_is_gso(skb)) {
2219		u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2220		tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2221
2222		tx_cmd_a |= TX_CMD_A_LSO;
2223	} else {
2224		tx_cmd_b = 0;
2225	}
2226
2227	skb_push(skb, 4);
2228	cpu_to_le32s(&tx_cmd_b);
2229	memcpy(skb->data, &tx_cmd_b, 4);
2230
2231	skb_push(skb, 4);
2232	cpu_to_le32s(&tx_cmd_a);
2233	memcpy(skb->data, &tx_cmd_a, 4);
2234
2235	return skb;
2236}
2237
2238static int smsc75xx_manage_power(struct usbnet *dev, int on)
2239{
2240	dev->intf->needs_remote_wakeup = on;
2241	return 0;
2242}
2243
2244static const struct driver_info smsc75xx_info = {
2245	.description	= "smsc75xx USB 2.0 Gigabit Ethernet",
2246	.bind		= smsc75xx_bind,
2247	.unbind		= smsc75xx_unbind,
2248	.link_reset	= smsc75xx_link_reset,
2249	.reset		= smsc75xx_reset,
2250	.rx_fixup	= smsc75xx_rx_fixup,
2251	.tx_fixup	= smsc75xx_tx_fixup,
2252	.status		= smsc75xx_status,
2253	.manage_power	= smsc75xx_manage_power,
2254	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2255};
2256
2257static const struct usb_device_id products[] = {
2258	{
2259		/* SMSC7500 USB Gigabit Ethernet Device */
2260		USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2261		.driver_info = (unsigned long) &smsc75xx_info,
2262	},
2263	{
2264		/* SMSC7500 USB Gigabit Ethernet Device */
2265		USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2266		.driver_info = (unsigned long) &smsc75xx_info,
2267	},
2268	{ },		/* END */
2269};
2270MODULE_DEVICE_TABLE(usb, products);
2271
2272static struct usb_driver smsc75xx_driver = {
2273	.name		= SMSC_CHIPNAME,
2274	.id_table	= products,
2275	.probe		= usbnet_probe,
2276	.suspend	= smsc75xx_suspend,
2277	.resume		= smsc75xx_resume,
2278	.reset_resume	= smsc75xx_resume,
2279	.disconnect	= usbnet_disconnect,
2280	.disable_hub_initiated_lpm = 1,
2281	.supports_autosuspend = 1,
2282};
2283
2284module_usb_driver(smsc75xx_driver);
2285
2286MODULE_AUTHOR("Nancy Lin");
2287MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2288MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2289MODULE_LICENSE("GPL");