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;
1674	u8 suspend_flags;
1675	int ret;
1676	u32 val;
1677
1678	BUG_ON(!dev);
1679	pdata = (struct smsc95xx_priv *)(dev->data[0]);
1680	suspend_flags = pdata->suspend_flags;
1681
1682	netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1683
1684	/* do this first to ensure it's cleared even in error case */
1685	pdata->suspend_flags = 0;
1686
1687	if (suspend_flags & SUSPEND_ALLMODES) {
1688		/* clear wake-up sources */
1689		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1690		if (ret < 0)
1691			return ret;
1692
1693		val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1694
1695		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1696		if (ret < 0)
1697			return ret;
1698
1699		/* clear wake-up status */
1700		ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1701		if (ret < 0)
1702			return ret;
1703
1704		val &= ~PM_CTL_WOL_EN_;
1705		val |= PM_CTL_WUPS_;
1706
1707		ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1708		if (ret < 0)
1709			return ret;
1710	}
1711
1712	ret = usbnet_resume(intf);
1713	if (ret < 0)
1714		netdev_warn(dev->net, "usbnet_resume error\n");
1715
1716	return ret;
1717}
1718
1719static int smsc95xx_reset_resume(struct usb_interface *intf)
1720{
1721	struct usbnet *dev = usb_get_intfdata(intf);
1722	int ret;
1723
1724	ret = smsc95xx_reset(dev);
1725	if (ret < 0)
1726		return ret;
1727
1728	return smsc95xx_resume(intf);
1729}
1730
1731static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1732{
1733	skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1734	skb->ip_summed = CHECKSUM_COMPLETE;
1735	skb_trim(skb, skb->len - 2);
1736}
1737
1738static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1739{
1740	/* This check is no longer done by usbnet */
1741	if (skb->len < dev->net->hard_header_len)
1742		return 0;
1743
1744	while (skb->len > 0) {
1745		u32 header, align_count;
1746		struct sk_buff *ax_skb;
1747		unsigned char *packet;
1748		u16 size;
1749
1750		memcpy(&header, skb->data, sizeof(header));
1751		le32_to_cpus(&header);
1752		skb_pull(skb, 4 + NET_IP_ALIGN);
1753		packet = skb->data;
1754
1755		/* get the packet length */
1756		size = (u16)((header & RX_STS_FL_) >> 16);
1757		align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1758
1759		if (unlikely(header & RX_STS_ES_)) {
1760			netif_dbg(dev, rx_err, dev->net,
1761				  "Error header=0x%08x\n", header);
1762			dev->net->stats.rx_errors++;
1763			dev->net->stats.rx_dropped++;
1764
1765			if (header & RX_STS_CRC_) {
1766				dev->net->stats.rx_crc_errors++;
1767			} else {
1768				if (header & (RX_STS_TL_ | RX_STS_RF_))
1769					dev->net->stats.rx_frame_errors++;
1770
1771				if ((header & RX_STS_LE_) &&
1772					(!(header & RX_STS_FT_)))
1773					dev->net->stats.rx_length_errors++;
1774			}
1775		} else {
1776			/* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1777			if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1778				netif_dbg(dev, rx_err, dev->net,
1779					  "size err header=0x%08x\n", header);
1780				return 0;
1781			}
1782
1783			/* last frame in this batch */
1784			if (skb->len == size) {
1785				if (dev->net->features & NETIF_F_RXCSUM)
1786					smsc95xx_rx_csum_offload(skb);
1787				skb_trim(skb, skb->len - 4); /* remove fcs */
1788				skb->truesize = size + sizeof(struct sk_buff);
1789
1790				return 1;
1791			}
1792
1793			ax_skb = skb_clone(skb, GFP_ATOMIC);
1794			if (unlikely(!ax_skb)) {
1795				netdev_warn(dev->net, "Error allocating skb\n");
1796				return 0;
1797			}
1798
1799			ax_skb->len = size;
1800			ax_skb->data = packet;
1801			skb_set_tail_pointer(ax_skb, size);
1802
1803			if (dev->net->features & NETIF_F_RXCSUM)
1804				smsc95xx_rx_csum_offload(ax_skb);
1805			skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1806			ax_skb->truesize = size + sizeof(struct sk_buff);
1807
1808			usbnet_skb_return(dev, ax_skb);
1809		}
1810
1811		skb_pull(skb, size);
1812
1813		/* padding bytes before the next frame starts */
1814		if (skb->len)
1815			skb_pull(skb, align_count);
1816	}
1817
1818	if (unlikely(skb->len < 0)) {
1819		netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1820		return 0;
1821	}
1822
1823	return 1;
1824}
1825
1826static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1827{
1828	u16 low_16 = (u16)skb_checksum_start_offset(skb);
1829	u16 high_16 = low_16 + skb->csum_offset;
1830	return (high_16 << 16) | low_16;
1831}
1832
1833static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1834					 struct sk_buff *skb, gfp_t flags)
1835{
1836	bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1837	int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1838	u32 tx_cmd_a, tx_cmd_b;
1839
1840	/* We do not advertise SG, so skbs should be already linearized */
1841	BUG_ON(skb_shinfo(skb)->nr_frags);
1842
1843	if (skb_headroom(skb) < overhead) {
1844		struct sk_buff *skb2 = skb_copy_expand(skb,
1845			overhead, 0, flags);
1846		dev_kfree_skb_any(skb);
1847		skb = skb2;
1848		if (!skb)
1849			return NULL;
1850	}
1851
1852	if (csum) {
1853		if (skb->len <= 45) {
1854			/* workaround - hardware tx checksum does not work
1855			 * properly with extremely small packets */
1856			long csstart = skb_checksum_start_offset(skb);
1857			__wsum calc = csum_partial(skb->data + csstart,
1858				skb->len - csstart, 0);
1859			*((__sum16 *)(skb->data + csstart
1860				+ skb->csum_offset)) = csum_fold(calc);
1861
1862			csum = false;
1863		} else {
1864			u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1865			skb_push(skb, 4);
1866			cpu_to_le32s(&csum_preamble);
1867			memcpy(skb->data, &csum_preamble, 4);
1868		}
1869	}
1870
1871	skb_push(skb, 4);
1872	tx_cmd_b = (u32)(skb->len - 4);
1873	if (csum)
1874		tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1875	cpu_to_le32s(&tx_cmd_b);
1876	memcpy(skb->data, &tx_cmd_b, 4);
1877
1878	skb_push(skb, 4);
1879	tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1880		TX_CMD_A_LAST_SEG_;
1881	cpu_to_le32s(&tx_cmd_a);
1882	memcpy(skb->data, &tx_cmd_a, 4);
1883
1884	return skb;
1885}
1886
1887static int smsc95xx_manage_power(struct usbnet *dev, int on)
1888{
1889	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1890
1891	dev->intf->needs_remote_wakeup = on;
1892
1893	if (pdata->features & FEATURE_REMOTE_WAKEUP)
1894		return 0;
1895
1896	/* this chip revision isn't capable of remote wakeup */
1897	netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1898
1899	if (on)
1900		usb_autopm_get_interface_no_resume(dev->intf);
1901	else
1902		usb_autopm_put_interface(dev->intf);
1903
1904	return 0;
1905}
1906
1907static const struct driver_info smsc95xx_info = {
1908	.description	= "smsc95xx USB 2.0 Ethernet",
1909	.bind		= smsc95xx_bind,
1910	.unbind		= smsc95xx_unbind,
1911	.link_reset	= smsc95xx_link_reset,
1912	.reset		= smsc95xx_reset,
1913	.rx_fixup	= smsc95xx_rx_fixup,
1914	.tx_fixup	= smsc95xx_tx_fixup,
1915	.status		= smsc95xx_status,
1916	.manage_power	= smsc95xx_manage_power,
1917	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1918};
1919
1920static const struct usb_device_id products[] = {
1921	{
1922		/* SMSC9500 USB Ethernet Device */
1923		USB_DEVICE(0x0424, 0x9500),
1924		.driver_info = (unsigned long) &smsc95xx_info,
1925	},
1926	{
1927		/* SMSC9505 USB Ethernet Device */
1928		USB_DEVICE(0x0424, 0x9505),
1929		.driver_info = (unsigned long) &smsc95xx_info,
1930	},
1931	{
1932		/* SMSC9500A USB Ethernet Device */
1933		USB_DEVICE(0x0424, 0x9E00),
1934		.driver_info = (unsigned long) &smsc95xx_info,
1935	},
1936	{
1937		/* SMSC9505A USB Ethernet Device */
1938		USB_DEVICE(0x0424, 0x9E01),
1939		.driver_info = (unsigned long) &smsc95xx_info,
1940	},
1941	{
1942		/* SMSC9512/9514 USB Hub & Ethernet Device */
1943		USB_DEVICE(0x0424, 0xec00),
1944		.driver_info = (unsigned long) &smsc95xx_info,
1945	},
1946	{
1947		/* SMSC9500 USB Ethernet Device (SAL10) */
1948		USB_DEVICE(0x0424, 0x9900),
1949		.driver_info = (unsigned long) &smsc95xx_info,
1950	},
1951	{
1952		/* SMSC9505 USB Ethernet Device (SAL10) */
1953		USB_DEVICE(0x0424, 0x9901),
1954		.driver_info = (unsigned long) &smsc95xx_info,
1955	},
1956	{
1957		/* SMSC9500A USB Ethernet Device (SAL10) */
1958		USB_DEVICE(0x0424, 0x9902),
1959		.driver_info = (unsigned long) &smsc95xx_info,
1960	},
1961	{
1962		/* SMSC9505A USB Ethernet Device (SAL10) */
1963		USB_DEVICE(0x0424, 0x9903),
1964		.driver_info = (unsigned long) &smsc95xx_info,
1965	},
1966	{
1967		/* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1968		USB_DEVICE(0x0424, 0x9904),
1969		.driver_info = (unsigned long) &smsc95xx_info,
1970	},
1971	{
1972		/* SMSC9500A USB Ethernet Device (HAL) */
1973		USB_DEVICE(0x0424, 0x9905),
1974		.driver_info = (unsigned long) &smsc95xx_info,
1975	},
1976	{
1977		/* SMSC9505A USB Ethernet Device (HAL) */
1978		USB_DEVICE(0x0424, 0x9906),
1979		.driver_info = (unsigned long) &smsc95xx_info,
1980	},
1981	{
1982		/* SMSC9500 USB Ethernet Device (Alternate ID) */
1983		USB_DEVICE(0x0424, 0x9907),
1984		.driver_info = (unsigned long) &smsc95xx_info,
1985	},
1986	{
1987		/* SMSC9500A USB Ethernet Device (Alternate ID) */
1988		USB_DEVICE(0x0424, 0x9908),
1989		.driver_info = (unsigned long) &smsc95xx_info,
1990	},
1991	{
1992		/* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1993		USB_DEVICE(0x0424, 0x9909),
1994		.driver_info = (unsigned long) &smsc95xx_info,
1995	},
1996	{
1997		/* SMSC LAN9530 USB Ethernet Device */
1998		USB_DEVICE(0x0424, 0x9530),
1999		.driver_info = (unsigned long) &smsc95xx_info,
2000	},
2001	{
2002		/* SMSC LAN9730 USB Ethernet Device */
2003		USB_DEVICE(0x0424, 0x9730),
2004		.driver_info = (unsigned long) &smsc95xx_info,
2005	},
2006	{
2007		/* SMSC LAN89530 USB Ethernet Device */
2008		USB_DEVICE(0x0424, 0x9E08),
2009		.driver_info = (unsigned long) &smsc95xx_info,
2010	},
2011	{ },		/* END */
2012};
2013MODULE_DEVICE_TABLE(usb, products);
2014
2015static struct usb_driver smsc95xx_driver = {
2016	.name		= "smsc95xx",
2017	.id_table	= products,
2018	.probe		= usbnet_probe,
2019	.suspend	= smsc95xx_suspend,
2020	.resume		= smsc95xx_resume,
2021	.reset_resume	= smsc95xx_reset_resume,
2022	.disconnect	= usbnet_disconnect,
2023	.disable_hub_initiated_lpm = 1,
2024	.supports_autosuspend = 1,
2025};
2026
2027module_usb_driver(smsc95xx_driver);
2028
2029MODULE_AUTHOR("Nancy Lin");
2030MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2031MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2032MODULE_LICENSE("GPL");
2033