xref: /openbmc/linux/drivers/net/usb/smsc95xx.c (revision f3a8b664)
1  /***************************************************************************
2  *
3  * Copyright (C) 2007-2008 SMSC
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
7  * as published by the Free Software Foundation; either version 2
8  * of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
17  *
18  *****************************************************************************/
19 
20 #include <linux/module.h>
21 #include <linux/kmod.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/mii.h>
26 #include <linux/usb.h>
27 #include <linux/bitrev.h>
28 #include <linux/crc16.h>
29 #include <linux/crc32.h>
30 #include <linux/usb/usbnet.h>
31 #include <linux/slab.h>
32 #include <linux/of_net.h>
33 #include "smsc95xx.h"
34 
35 #define SMSC_CHIPNAME			"smsc95xx"
36 #define SMSC_DRIVER_VERSION		"1.0.5"
37 #define HS_USB_PKT_SIZE			(512)
38 #define FS_USB_PKT_SIZE			(64)
39 #define DEFAULT_HS_BURST_CAP_SIZE	(16 * 1024 + 5 * HS_USB_PKT_SIZE)
40 #define DEFAULT_FS_BURST_CAP_SIZE	(6 * 1024 + 33 * FS_USB_PKT_SIZE)
41 #define DEFAULT_BULK_IN_DELAY		(0x00002000)
42 #define MAX_SINGLE_PACKET_SIZE		(2048)
43 #define LAN95XX_EEPROM_MAGIC		(0x9500)
44 #define EEPROM_MAC_OFFSET		(0x01)
45 #define DEFAULT_TX_CSUM_ENABLE		(true)
46 #define DEFAULT_RX_CSUM_ENABLE		(true)
47 #define SMSC95XX_INTERNAL_PHY_ID	(1)
48 #define SMSC95XX_TX_OVERHEAD		(8)
49 #define SMSC95XX_TX_OVERHEAD_CSUM	(12)
50 #define SUPPORTED_WAKE			(WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
51 					 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
52 
53 #define FEATURE_8_WAKEUP_FILTERS	(0x01)
54 #define FEATURE_PHY_NLP_CROSSOVER	(0x02)
55 #define FEATURE_REMOTE_WAKEUP		(0x04)
56 
57 #define SUSPEND_SUSPEND0		(0x01)
58 #define SUSPEND_SUSPEND1		(0x02)
59 #define SUSPEND_SUSPEND2		(0x04)
60 #define SUSPEND_SUSPEND3		(0x08)
61 #define SUSPEND_ALLMODES		(SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
62 					 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
63 
64 #define CARRIER_CHECK_DELAY (2 * HZ)
65 
66 struct smsc95xx_priv {
67 	u32 chip_id;
68 	u32 mac_cr;
69 	u32 hash_hi;
70 	u32 hash_lo;
71 	u32 wolopts;
72 	spinlock_t mac_cr_lock;
73 	u8 features;
74 	u8 suspend_flags;
75 	u8 mdix_ctrl;
76 	bool link_ok;
77 	struct delayed_work carrier_check;
78 	struct usbnet *dev;
79 };
80 
81 static bool turbo_mode = true;
82 module_param(turbo_mode, bool, 0644);
83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
84 
85 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
86 					    u32 *data, int in_pm)
87 {
88 	u32 buf;
89 	int ret;
90 	int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
91 
92 	BUG_ON(!dev);
93 
94 	if (!in_pm)
95 		fn = usbnet_read_cmd;
96 	else
97 		fn = usbnet_read_cmd_nopm;
98 
99 	ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
100 		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
101 		 0, index, &buf, 4);
102 	if (unlikely(ret < 0)) {
103 		netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
104 			    index, ret);
105 		return ret;
106 	}
107 
108 	le32_to_cpus(&buf);
109 	*data = buf;
110 
111 	return ret;
112 }
113 
114 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
115 					     u32 data, int in_pm)
116 {
117 	u32 buf;
118 	int ret;
119 	int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
120 
121 	BUG_ON(!dev);
122 
123 	if (!in_pm)
124 		fn = usbnet_write_cmd;
125 	else
126 		fn = usbnet_write_cmd_nopm;
127 
128 	buf = data;
129 	cpu_to_le32s(&buf);
130 
131 	ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
132 		 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
133 		 0, index, &buf, 4);
134 	if (unlikely(ret < 0))
135 		netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
136 			    index, ret);
137 
138 	return ret;
139 }
140 
141 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
142 					       u32 *data)
143 {
144 	return __smsc95xx_read_reg(dev, index, data, 1);
145 }
146 
147 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
148 						u32 data)
149 {
150 	return __smsc95xx_write_reg(dev, index, data, 1);
151 }
152 
153 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
154 					  u32 *data)
155 {
156 	return __smsc95xx_read_reg(dev, index, data, 0);
157 }
158 
159 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
160 					   u32 data)
161 {
162 	return __smsc95xx_write_reg(dev, index, data, 0);
163 }
164 
165 /* Loop until the read is completed with timeout
166  * called with phy_mutex held */
167 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
168 						     int in_pm)
169 {
170 	unsigned long start_time = jiffies;
171 	u32 val;
172 	int ret;
173 
174 	do {
175 		ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
176 		if (ret < 0) {
177 			netdev_warn(dev->net, "Error reading MII_ACCESS\n");
178 			return ret;
179 		}
180 
181 		if (!(val & MII_BUSY_))
182 			return 0;
183 	} while (!time_after(jiffies, start_time + HZ));
184 
185 	return -EIO;
186 }
187 
188 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
189 				int in_pm)
190 {
191 	struct usbnet *dev = netdev_priv(netdev);
192 	u32 val, addr;
193 	int ret;
194 
195 	mutex_lock(&dev->phy_mutex);
196 
197 	/* confirm MII not busy */
198 	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
199 	if (ret < 0) {
200 		netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
201 		goto done;
202 	}
203 
204 	/* set the address, index & direction (read from PHY) */
205 	phy_id &= dev->mii.phy_id_mask;
206 	idx &= dev->mii.reg_num_mask;
207 	addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
208 	ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
209 	if (ret < 0) {
210 		netdev_warn(dev->net, "Error writing MII_ADDR\n");
211 		goto done;
212 	}
213 
214 	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
215 	if (ret < 0) {
216 		netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
217 		goto done;
218 	}
219 
220 	ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
221 	if (ret < 0) {
222 		netdev_warn(dev->net, "Error reading MII_DATA\n");
223 		goto done;
224 	}
225 
226 	ret = (u16)(val & 0xFFFF);
227 
228 done:
229 	mutex_unlock(&dev->phy_mutex);
230 	return ret;
231 }
232 
233 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
234 				  int idx, int regval, int in_pm)
235 {
236 	struct usbnet *dev = netdev_priv(netdev);
237 	u32 val, addr;
238 	int ret;
239 
240 	mutex_lock(&dev->phy_mutex);
241 
242 	/* confirm MII not busy */
243 	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
244 	if (ret < 0) {
245 		netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
246 		goto done;
247 	}
248 
249 	val = regval;
250 	ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
251 	if (ret < 0) {
252 		netdev_warn(dev->net, "Error writing MII_DATA\n");
253 		goto done;
254 	}
255 
256 	/* set the address, index & direction (write to PHY) */
257 	phy_id &= dev->mii.phy_id_mask;
258 	idx &= dev->mii.reg_num_mask;
259 	addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
260 	ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
261 	if (ret < 0) {
262 		netdev_warn(dev->net, "Error writing MII_ADDR\n");
263 		goto done;
264 	}
265 
266 	ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
267 	if (ret < 0) {
268 		netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
269 		goto done;
270 	}
271 
272 done:
273 	mutex_unlock(&dev->phy_mutex);
274 }
275 
276 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
277 				   int idx)
278 {
279 	return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
280 }
281 
282 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
283 				     int idx, int regval)
284 {
285 	__smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
286 }
287 
288 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
289 {
290 	return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
291 }
292 
293 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
294 				int regval)
295 {
296 	__smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
297 }
298 
299 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
300 {
301 	unsigned long start_time = jiffies;
302 	u32 val;
303 	int ret;
304 
305 	do {
306 		ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
307 		if (ret < 0) {
308 			netdev_warn(dev->net, "Error reading E2P_CMD\n");
309 			return ret;
310 		}
311 
312 		if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
313 			break;
314 		udelay(40);
315 	} while (!time_after(jiffies, start_time + HZ));
316 
317 	if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
318 		netdev_warn(dev->net, "EEPROM read operation timeout\n");
319 		return -EIO;
320 	}
321 
322 	return 0;
323 }
324 
325 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
326 {
327 	unsigned long start_time = jiffies;
328 	u32 val;
329 	int ret;
330 
331 	do {
332 		ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
333 		if (ret < 0) {
334 			netdev_warn(dev->net, "Error reading E2P_CMD\n");
335 			return ret;
336 		}
337 
338 		if (!(val & E2P_CMD_BUSY_))
339 			return 0;
340 
341 		udelay(40);
342 	} while (!time_after(jiffies, start_time + HZ));
343 
344 	netdev_warn(dev->net, "EEPROM is busy\n");
345 	return -EIO;
346 }
347 
348 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
349 				u8 *data)
350 {
351 	u32 val;
352 	int i, ret;
353 
354 	BUG_ON(!dev);
355 	BUG_ON(!data);
356 
357 	ret = smsc95xx_eeprom_confirm_not_busy(dev);
358 	if (ret)
359 		return ret;
360 
361 	for (i = 0; i < length; i++) {
362 		val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
363 		ret = smsc95xx_write_reg(dev, E2P_CMD, val);
364 		if (ret < 0) {
365 			netdev_warn(dev->net, "Error writing E2P_CMD\n");
366 			return ret;
367 		}
368 
369 		ret = smsc95xx_wait_eeprom(dev);
370 		if (ret < 0)
371 			return ret;
372 
373 		ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
374 		if (ret < 0) {
375 			netdev_warn(dev->net, "Error reading E2P_DATA\n");
376 			return ret;
377 		}
378 
379 		data[i] = val & 0xFF;
380 		offset++;
381 	}
382 
383 	return 0;
384 }
385 
386 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
387 				 u8 *data)
388 {
389 	u32 val;
390 	int i, ret;
391 
392 	BUG_ON(!dev);
393 	BUG_ON(!data);
394 
395 	ret = smsc95xx_eeprom_confirm_not_busy(dev);
396 	if (ret)
397 		return ret;
398 
399 	/* Issue write/erase enable command */
400 	val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
401 	ret = smsc95xx_write_reg(dev, E2P_CMD, val);
402 	if (ret < 0) {
403 		netdev_warn(dev->net, "Error writing E2P_DATA\n");
404 		return ret;
405 	}
406 
407 	ret = smsc95xx_wait_eeprom(dev);
408 	if (ret < 0)
409 		return ret;
410 
411 	for (i = 0; i < length; i++) {
412 
413 		/* Fill data register */
414 		val = data[i];
415 		ret = smsc95xx_write_reg(dev, E2P_DATA, val);
416 		if (ret < 0) {
417 			netdev_warn(dev->net, "Error writing E2P_DATA\n");
418 			return ret;
419 		}
420 
421 		/* Send "write" command */
422 		val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
423 		ret = smsc95xx_write_reg(dev, E2P_CMD, val);
424 		if (ret < 0) {
425 			netdev_warn(dev->net, "Error writing E2P_CMD\n");
426 			return ret;
427 		}
428 
429 		ret = smsc95xx_wait_eeprom(dev);
430 		if (ret < 0)
431 			return ret;
432 
433 		offset++;
434 	}
435 
436 	return 0;
437 }
438 
439 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
440 						 u32 data)
441 {
442 	const u16 size = 4;
443 	u32 buf;
444 	int ret;
445 
446 	buf = data;
447 	cpu_to_le32s(&buf);
448 
449 	ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
450 				     USB_DIR_OUT | USB_TYPE_VENDOR |
451 				     USB_RECIP_DEVICE,
452 				     0, index, &buf, size);
453 	if (ret < 0)
454 		netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
455 			    ret);
456 	return ret;
457 }
458 
459 /* returns hash bit number for given MAC address
460  * example:
461  * 01 00 5E 00 00 01 -> returns bit number 31 */
462 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
463 {
464 	return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
465 }
466 
467 static void smsc95xx_set_multicast(struct net_device *netdev)
468 {
469 	struct usbnet *dev = netdev_priv(netdev);
470 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
471 	unsigned long flags;
472 	int ret;
473 
474 	pdata->hash_hi = 0;
475 	pdata->hash_lo = 0;
476 
477 	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
478 
479 	if (dev->net->flags & IFF_PROMISC) {
480 		netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
481 		pdata->mac_cr |= MAC_CR_PRMS_;
482 		pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
483 	} else if (dev->net->flags & IFF_ALLMULTI) {
484 		netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
485 		pdata->mac_cr |= MAC_CR_MCPAS_;
486 		pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
487 	} else if (!netdev_mc_empty(dev->net)) {
488 		struct netdev_hw_addr *ha;
489 
490 		pdata->mac_cr |= MAC_CR_HPFILT_;
491 		pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
492 
493 		netdev_for_each_mc_addr(ha, netdev) {
494 			u32 bitnum = smsc95xx_hash(ha->addr);
495 			u32 mask = 0x01 << (bitnum & 0x1F);
496 			if (bitnum & 0x20)
497 				pdata->hash_hi |= mask;
498 			else
499 				pdata->hash_lo |= mask;
500 		}
501 
502 		netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
503 				   pdata->hash_hi, pdata->hash_lo);
504 	} else {
505 		netif_dbg(dev, drv, dev->net, "receive own packets only\n");
506 		pdata->mac_cr &=
507 			~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
508 	}
509 
510 	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
511 
512 	/* Initiate async writes, as we can't wait for completion here */
513 	ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
514 	if (ret < 0)
515 		netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
516 
517 	ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
518 	if (ret < 0)
519 		netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
520 
521 	ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
522 	if (ret < 0)
523 		netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
524 }
525 
526 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
527 					   u16 lcladv, u16 rmtadv)
528 {
529 	u32 flow, afc_cfg = 0;
530 
531 	int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
532 	if (ret < 0)
533 		return ret;
534 
535 	if (duplex == DUPLEX_FULL) {
536 		u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
537 
538 		if (cap & FLOW_CTRL_RX)
539 			flow = 0xFFFF0002;
540 		else
541 			flow = 0;
542 
543 		if (cap & FLOW_CTRL_TX)
544 			afc_cfg |= 0xF;
545 		else
546 			afc_cfg &= ~0xF;
547 
548 		netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
549 				   cap & FLOW_CTRL_RX ? "enabled" : "disabled",
550 				   cap & FLOW_CTRL_TX ? "enabled" : "disabled");
551 	} else {
552 		netif_dbg(dev, link, dev->net, "half duplex\n");
553 		flow = 0;
554 		afc_cfg |= 0xF;
555 	}
556 
557 	ret = smsc95xx_write_reg(dev, FLOW, flow);
558 	if (ret < 0)
559 		return ret;
560 
561 	return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
562 }
563 
564 static int smsc95xx_link_reset(struct usbnet *dev)
565 {
566 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
567 	struct mii_if_info *mii = &dev->mii;
568 	struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
569 	unsigned long flags;
570 	u16 lcladv, rmtadv;
571 	int ret;
572 
573 	/* clear interrupt status */
574 	ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
575 	if (ret < 0)
576 		return ret;
577 
578 	ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
579 	if (ret < 0)
580 		return ret;
581 
582 	mii_check_media(mii, 1, 1);
583 	mii_ethtool_gset(&dev->mii, &ecmd);
584 	lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
585 	rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
586 
587 	netif_dbg(dev, link, dev->net,
588 		  "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
589 		  ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
590 
591 	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
592 	if (ecmd.duplex != DUPLEX_FULL) {
593 		pdata->mac_cr &= ~MAC_CR_FDPX_;
594 		pdata->mac_cr |= MAC_CR_RCVOWN_;
595 	} else {
596 		pdata->mac_cr &= ~MAC_CR_RCVOWN_;
597 		pdata->mac_cr |= MAC_CR_FDPX_;
598 	}
599 	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
600 
601 	ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
602 	if (ret < 0)
603 		return ret;
604 
605 	ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
606 	if (ret < 0)
607 		netdev_warn(dev->net, "Error updating PHY flow control\n");
608 
609 	return ret;
610 }
611 
612 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
613 {
614 	u32 intdata;
615 
616 	if (urb->actual_length != 4) {
617 		netdev_warn(dev->net, "unexpected urb length %d\n",
618 			    urb->actual_length);
619 		return;
620 	}
621 
622 	memcpy(&intdata, urb->transfer_buffer, 4);
623 	le32_to_cpus(&intdata);
624 
625 	netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
626 
627 	if (intdata & INT_ENP_PHY_INT_)
628 		usbnet_defer_kevent(dev, EVENT_LINK_RESET);
629 	else
630 		netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
631 			    intdata);
632 }
633 
634 static void set_carrier(struct usbnet *dev, bool link)
635 {
636 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
637 
638 	if (pdata->link_ok == link)
639 		return;
640 
641 	pdata->link_ok = link;
642 
643 	if (link)
644 		usbnet_link_change(dev, 1, 0);
645 	else
646 		usbnet_link_change(dev, 0, 0);
647 }
648 
649 static void check_carrier(struct work_struct *work)
650 {
651 	struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
652 						carrier_check.work);
653 	struct usbnet *dev = pdata->dev;
654 	int ret;
655 
656 	if (pdata->suspend_flags != 0)
657 		return;
658 
659 	ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
660 	if (ret < 0) {
661 		netdev_warn(dev->net, "Failed to read MII_BMSR\n");
662 		return;
663 	}
664 	if (ret & BMSR_LSTATUS)
665 		set_carrier(dev, 1);
666 	else
667 		set_carrier(dev, 0);
668 
669 	schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
670 }
671 
672 /* Enable or disable Tx & Rx checksum offload engines */
673 static int smsc95xx_set_features(struct net_device *netdev,
674 	netdev_features_t features)
675 {
676 	struct usbnet *dev = netdev_priv(netdev);
677 	u32 read_buf;
678 	int ret;
679 
680 	ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
681 	if (ret < 0)
682 		return ret;
683 
684 	if (features & NETIF_F_HW_CSUM)
685 		read_buf |= Tx_COE_EN_;
686 	else
687 		read_buf &= ~Tx_COE_EN_;
688 
689 	if (features & NETIF_F_RXCSUM)
690 		read_buf |= Rx_COE_EN_;
691 	else
692 		read_buf &= ~Rx_COE_EN_;
693 
694 	ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
695 	if (ret < 0)
696 		return ret;
697 
698 	netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
699 	return 0;
700 }
701 
702 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
703 {
704 	return MAX_EEPROM_SIZE;
705 }
706 
707 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
708 				       struct ethtool_eeprom *ee, u8 *data)
709 {
710 	struct usbnet *dev = netdev_priv(netdev);
711 
712 	ee->magic = LAN95XX_EEPROM_MAGIC;
713 
714 	return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
715 }
716 
717 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
718 				       struct ethtool_eeprom *ee, u8 *data)
719 {
720 	struct usbnet *dev = netdev_priv(netdev);
721 
722 	if (ee->magic != LAN95XX_EEPROM_MAGIC) {
723 		netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
724 			    ee->magic);
725 		return -EINVAL;
726 	}
727 
728 	return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
729 }
730 
731 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
732 {
733 	/* all smsc95xx registers */
734 	return COE_CR - ID_REV + sizeof(u32);
735 }
736 
737 static void
738 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
739 			 void *buf)
740 {
741 	struct usbnet *dev = netdev_priv(netdev);
742 	unsigned int i, j;
743 	int retval;
744 	u32 *data = buf;
745 
746 	retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
747 	if (retval < 0) {
748 		netdev_warn(netdev, "REGS: cannot read ID_REV\n");
749 		return;
750 	}
751 
752 	for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
753 		retval = smsc95xx_read_reg(dev, i, &data[j]);
754 		if (retval < 0) {
755 			netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
756 			return;
757 		}
758 	}
759 }
760 
761 static void smsc95xx_ethtool_get_wol(struct net_device *net,
762 				     struct ethtool_wolinfo *wolinfo)
763 {
764 	struct usbnet *dev = netdev_priv(net);
765 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
766 
767 	wolinfo->supported = SUPPORTED_WAKE;
768 	wolinfo->wolopts = pdata->wolopts;
769 }
770 
771 static int smsc95xx_ethtool_set_wol(struct net_device *net,
772 				    struct ethtool_wolinfo *wolinfo)
773 {
774 	struct usbnet *dev = netdev_priv(net);
775 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
776 	int ret;
777 
778 	pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
779 
780 	ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
781 	if (ret < 0)
782 		netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
783 
784 	return ret;
785 }
786 
787 static int get_mdix_status(struct net_device *net)
788 {
789 	struct usbnet *dev = netdev_priv(net);
790 	u32 val;
791 	int buf;
792 
793 	buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
794 	if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
795 		if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
796 			return ETH_TP_MDI_AUTO;
797 		else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
798 			return ETH_TP_MDI_X;
799 	} else {
800 		buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
801 		if (val & STRAP_STATUS_AMDIX_EN_)
802 			return ETH_TP_MDI_AUTO;
803 	}
804 
805 	return ETH_TP_MDI;
806 }
807 
808 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
809 {
810 	struct usbnet *dev = netdev_priv(net);
811 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
812 	int buf;
813 
814 	if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
815 	    (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
816 	    (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
817 	    (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
818 		/* Extend Manual AutoMDIX timer for 9500A/9500Ai */
819 		buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
820 					 PHY_EDPD_CONFIG);
821 		buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
822 		smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
823 				    PHY_EDPD_CONFIG, buf);
824 	}
825 
826 	if (mdix_ctrl == ETH_TP_MDI) {
827 		buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
828 					 SPECIAL_CTRL_STS);
829 		buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
830 		buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
831 			 SPECIAL_CTRL_STS_AMDIX_STATE_);
832 		smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
833 				    SPECIAL_CTRL_STS, buf);
834 	} else if (mdix_ctrl == ETH_TP_MDI_X) {
835 		buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
836 					 SPECIAL_CTRL_STS);
837 		buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
838 		buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
839 			 SPECIAL_CTRL_STS_AMDIX_STATE_);
840 		buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
841 		smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
842 				    SPECIAL_CTRL_STS, buf);
843 	} else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
844 		buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
845 					 SPECIAL_CTRL_STS);
846 		buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
847 		buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
848 			 SPECIAL_CTRL_STS_AMDIX_STATE_);
849 		buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
850 		smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
851 				    SPECIAL_CTRL_STS, buf);
852 	}
853 	pdata->mdix_ctrl = mdix_ctrl;
854 }
855 
856 static int smsc95xx_get_settings(struct net_device *net,
857 				 struct ethtool_cmd *cmd)
858 {
859 	struct usbnet *dev = netdev_priv(net);
860 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
861 	int retval;
862 
863 	retval = usbnet_get_settings(net, cmd);
864 
865 	cmd->eth_tp_mdix = pdata->mdix_ctrl;
866 	cmd->eth_tp_mdix_ctrl = pdata->mdix_ctrl;
867 
868 	return retval;
869 }
870 
871 static int smsc95xx_set_settings(struct net_device *net,
872 				 struct ethtool_cmd *cmd)
873 {
874 	struct usbnet *dev = netdev_priv(net);
875 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
876 	int retval;
877 
878 	if (pdata->mdix_ctrl != cmd->eth_tp_mdix_ctrl)
879 		set_mdix_status(net, cmd->eth_tp_mdix_ctrl);
880 
881 	retval = usbnet_set_settings(net, cmd);
882 
883 	return retval;
884 }
885 
886 static const struct ethtool_ops smsc95xx_ethtool_ops = {
887 	.get_link	= usbnet_get_link,
888 	.nway_reset	= usbnet_nway_reset,
889 	.get_drvinfo	= usbnet_get_drvinfo,
890 	.get_msglevel	= usbnet_get_msglevel,
891 	.set_msglevel	= usbnet_set_msglevel,
892 	.get_settings	= smsc95xx_get_settings,
893 	.set_settings	= smsc95xx_set_settings,
894 	.get_eeprom_len	= smsc95xx_ethtool_get_eeprom_len,
895 	.get_eeprom	= smsc95xx_ethtool_get_eeprom,
896 	.set_eeprom	= smsc95xx_ethtool_set_eeprom,
897 	.get_regs_len	= smsc95xx_ethtool_getregslen,
898 	.get_regs	= smsc95xx_ethtool_getregs,
899 	.get_wol	= smsc95xx_ethtool_get_wol,
900 	.set_wol	= smsc95xx_ethtool_set_wol,
901 };
902 
903 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
904 {
905 	struct usbnet *dev = netdev_priv(netdev);
906 
907 	if (!netif_running(netdev))
908 		return -EINVAL;
909 
910 	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
911 }
912 
913 static void smsc95xx_init_mac_address(struct usbnet *dev)
914 {
915 	const u8 *mac_addr;
916 
917 	/* maybe the boot loader passed the MAC address in devicetree */
918 	mac_addr = of_get_mac_address(dev->udev->dev.of_node);
919 	if (mac_addr) {
920 		memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
921 		return;
922 	}
923 
924 	/* try reading mac address from EEPROM */
925 	if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
926 			dev->net->dev_addr) == 0) {
927 		if (is_valid_ether_addr(dev->net->dev_addr)) {
928 			/* eeprom values are valid so use them */
929 			netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
930 			return;
931 		}
932 	}
933 
934 	/* no useful static MAC address found. generate a random one */
935 	eth_hw_addr_random(dev->net);
936 	netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
937 }
938 
939 static int smsc95xx_set_mac_address(struct usbnet *dev)
940 {
941 	u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
942 		dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
943 	u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
944 	int ret;
945 
946 	ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
947 	if (ret < 0)
948 		return ret;
949 
950 	return smsc95xx_write_reg(dev, ADDRH, addr_hi);
951 }
952 
953 /* starts the TX path */
954 static int smsc95xx_start_tx_path(struct usbnet *dev)
955 {
956 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
957 	unsigned long flags;
958 	int ret;
959 
960 	/* Enable Tx at MAC */
961 	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
962 	pdata->mac_cr |= MAC_CR_TXEN_;
963 	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
964 
965 	ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
966 	if (ret < 0)
967 		return ret;
968 
969 	/* Enable Tx at SCSRs */
970 	return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
971 }
972 
973 /* Starts the Receive path */
974 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
975 {
976 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
977 	unsigned long flags;
978 
979 	spin_lock_irqsave(&pdata->mac_cr_lock, flags);
980 	pdata->mac_cr |= MAC_CR_RXEN_;
981 	spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
982 
983 	return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
984 }
985 
986 static int smsc95xx_phy_initialize(struct usbnet *dev)
987 {
988 	int bmcr, ret, timeout = 0;
989 
990 	/* Initialize MII structure */
991 	dev->mii.dev = dev->net;
992 	dev->mii.mdio_read = smsc95xx_mdio_read;
993 	dev->mii.mdio_write = smsc95xx_mdio_write;
994 	dev->mii.phy_id_mask = 0x1f;
995 	dev->mii.reg_num_mask = 0x1f;
996 	dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
997 
998 	/* reset phy and wait for reset to complete */
999 	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1000 
1001 	do {
1002 		msleep(10);
1003 		bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
1004 		timeout++;
1005 	} while ((bmcr & BMCR_RESET) && (timeout < 100));
1006 
1007 	if (timeout >= 100) {
1008 		netdev_warn(dev->net, "timeout on PHY Reset");
1009 		return -EIO;
1010 	}
1011 
1012 	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1013 		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1014 		ADVERTISE_PAUSE_ASYM);
1015 
1016 	/* read to clear */
1017 	ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1018 	if (ret < 0) {
1019 		netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1020 		return ret;
1021 	}
1022 
1023 	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1024 		PHY_INT_MASK_DEFAULT_);
1025 	mii_nway_restart(&dev->mii);
1026 
1027 	netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1028 	return 0;
1029 }
1030 
1031 static int smsc95xx_reset(struct usbnet *dev)
1032 {
1033 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1034 	u32 read_buf, write_buf, burst_cap;
1035 	int ret = 0, timeout;
1036 
1037 	netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1038 
1039 	ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1040 	if (ret < 0)
1041 		return ret;
1042 
1043 	timeout = 0;
1044 	do {
1045 		msleep(10);
1046 		ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1047 		if (ret < 0)
1048 			return ret;
1049 		timeout++;
1050 	} while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1051 
1052 	if (timeout >= 100) {
1053 		netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1054 		return ret;
1055 	}
1056 
1057 	ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1058 	if (ret < 0)
1059 		return ret;
1060 
1061 	timeout = 0;
1062 	do {
1063 		msleep(10);
1064 		ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1065 		if (ret < 0)
1066 			return ret;
1067 		timeout++;
1068 	} while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1069 
1070 	if (timeout >= 100) {
1071 		netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1072 		return ret;
1073 	}
1074 
1075 	ret = smsc95xx_set_mac_address(dev);
1076 	if (ret < 0)
1077 		return ret;
1078 
1079 	netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1080 		  dev->net->dev_addr);
1081 
1082 	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1083 	if (ret < 0)
1084 		return ret;
1085 
1086 	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1087 		  read_buf);
1088 
1089 	read_buf |= HW_CFG_BIR_;
1090 
1091 	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1092 	if (ret < 0)
1093 		return ret;
1094 
1095 	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1096 	if (ret < 0)
1097 		return ret;
1098 
1099 	netif_dbg(dev, ifup, dev->net,
1100 		  "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1101 		  read_buf);
1102 
1103 	if (!turbo_mode) {
1104 		burst_cap = 0;
1105 		dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1106 	} else if (dev->udev->speed == USB_SPEED_HIGH) {
1107 		burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1108 		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1109 	} else {
1110 		burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1111 		dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1112 	}
1113 
1114 	netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1115 		  (ulong)dev->rx_urb_size);
1116 
1117 	ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1118 	if (ret < 0)
1119 		return ret;
1120 
1121 	ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1122 	if (ret < 0)
1123 		return ret;
1124 
1125 	netif_dbg(dev, ifup, dev->net,
1126 		  "Read Value from BURST_CAP after writing: 0x%08x\n",
1127 		  read_buf);
1128 
1129 	ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1130 	if (ret < 0)
1131 		return ret;
1132 
1133 	ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1134 	if (ret < 0)
1135 		return ret;
1136 
1137 	netif_dbg(dev, ifup, dev->net,
1138 		  "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1139 		  read_buf);
1140 
1141 	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1142 	if (ret < 0)
1143 		return ret;
1144 
1145 	netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1146 		  read_buf);
1147 
1148 	if (turbo_mode)
1149 		read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1150 
1151 	read_buf &= ~HW_CFG_RXDOFF_;
1152 
1153 	/* set Rx data offset=2, Make IP header aligns on word boundary. */
1154 	read_buf |= NET_IP_ALIGN << 9;
1155 
1156 	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1157 	if (ret < 0)
1158 		return ret;
1159 
1160 	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1161 	if (ret < 0)
1162 		return ret;
1163 
1164 	netif_dbg(dev, ifup, dev->net,
1165 		  "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1166 
1167 	ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1168 	if (ret < 0)
1169 		return ret;
1170 
1171 	ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1172 	if (ret < 0)
1173 		return ret;
1174 	netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1175 
1176 	/* Configure GPIO pins as LED outputs */
1177 	write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1178 		LED_GPIO_CFG_FDX_LED;
1179 	ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1180 	if (ret < 0)
1181 		return ret;
1182 
1183 	/* Init Tx */
1184 	ret = smsc95xx_write_reg(dev, FLOW, 0);
1185 	if (ret < 0)
1186 		return ret;
1187 
1188 	ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1189 	if (ret < 0)
1190 		return ret;
1191 
1192 	/* Don't need mac_cr_lock during initialisation */
1193 	ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1194 	if (ret < 0)
1195 		return ret;
1196 
1197 	/* Init Rx */
1198 	/* Set Vlan */
1199 	ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1200 	if (ret < 0)
1201 		return ret;
1202 
1203 	/* Enable or disable checksum offload engines */
1204 	ret = smsc95xx_set_features(dev->net, dev->net->features);
1205 	if (ret < 0) {
1206 		netdev_warn(dev->net, "Failed to set checksum offload features\n");
1207 		return ret;
1208 	}
1209 
1210 	smsc95xx_set_multicast(dev->net);
1211 
1212 	ret = smsc95xx_phy_initialize(dev);
1213 	if (ret < 0) {
1214 		netdev_warn(dev->net, "Failed to init PHY\n");
1215 		return ret;
1216 	}
1217 
1218 	ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1219 	if (ret < 0)
1220 		return ret;
1221 
1222 	/* enable PHY interrupts */
1223 	read_buf |= INT_EP_CTL_PHY_INT_;
1224 
1225 	ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1226 	if (ret < 0)
1227 		return ret;
1228 
1229 	ret = smsc95xx_start_tx_path(dev);
1230 	if (ret < 0) {
1231 		netdev_warn(dev->net, "Failed to start TX path\n");
1232 		return ret;
1233 	}
1234 
1235 	ret = smsc95xx_start_rx_path(dev, 0);
1236 	if (ret < 0) {
1237 		netdev_warn(dev->net, "Failed to start RX path\n");
1238 		return ret;
1239 	}
1240 
1241 	netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1242 	return 0;
1243 }
1244 
1245 static const struct net_device_ops smsc95xx_netdev_ops = {
1246 	.ndo_open		= usbnet_open,
1247 	.ndo_stop		= usbnet_stop,
1248 	.ndo_start_xmit		= usbnet_start_xmit,
1249 	.ndo_tx_timeout		= usbnet_tx_timeout,
1250 	.ndo_change_mtu		= usbnet_change_mtu,
1251 	.ndo_set_mac_address 	= eth_mac_addr,
1252 	.ndo_validate_addr	= eth_validate_addr,
1253 	.ndo_do_ioctl 		= smsc95xx_ioctl,
1254 	.ndo_set_rx_mode	= smsc95xx_set_multicast,
1255 	.ndo_set_features	= smsc95xx_set_features,
1256 };
1257 
1258 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1259 {
1260 	struct smsc95xx_priv *pdata = NULL;
1261 	u32 val;
1262 	int ret;
1263 
1264 	printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1265 
1266 	ret = usbnet_get_endpoints(dev, intf);
1267 	if (ret < 0) {
1268 		netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1269 		return ret;
1270 	}
1271 
1272 	dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1273 					      GFP_KERNEL);
1274 
1275 	pdata = (struct smsc95xx_priv *)(dev->data[0]);
1276 	if (!pdata)
1277 		return -ENOMEM;
1278 
1279 	spin_lock_init(&pdata->mac_cr_lock);
1280 
1281 	if (DEFAULT_TX_CSUM_ENABLE)
1282 		dev->net->features |= NETIF_F_HW_CSUM;
1283 	if (DEFAULT_RX_CSUM_ENABLE)
1284 		dev->net->features |= NETIF_F_RXCSUM;
1285 
1286 	dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1287 
1288 	smsc95xx_init_mac_address(dev);
1289 
1290 	/* Init all registers */
1291 	ret = smsc95xx_reset(dev);
1292 
1293 	/* detect device revision as different features may be available */
1294 	ret = smsc95xx_read_reg(dev, ID_REV, &val);
1295 	if (ret < 0)
1296 		return ret;
1297 	val >>= 16;
1298 	pdata->chip_id = val;
1299 	pdata->mdix_ctrl = get_mdix_status(dev->net);
1300 
1301 	if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1302 	    (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1303 		pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1304 			FEATURE_PHY_NLP_CROSSOVER |
1305 			FEATURE_REMOTE_WAKEUP);
1306 	else if (val == ID_REV_CHIP_ID_9512_)
1307 		pdata->features = FEATURE_8_WAKEUP_FILTERS;
1308 
1309 	dev->net->netdev_ops = &smsc95xx_netdev_ops;
1310 	dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1311 	dev->net->flags |= IFF_MULTICAST;
1312 	dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1313 	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1314 
1315 	pdata->dev = dev;
1316 	INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1317 	schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1318 
1319 	return 0;
1320 }
1321 
1322 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1323 {
1324 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1325 
1326 	if (pdata) {
1327 		cancel_delayed_work(&pdata->carrier_check);
1328 		netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1329 		kfree(pdata);
1330 		pdata = NULL;
1331 		dev->data[0] = 0;
1332 	}
1333 }
1334 
1335 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1336 {
1337 	u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1338 	return crc << ((filter % 2) * 16);
1339 }
1340 
1341 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1342 {
1343 	struct mii_if_info *mii = &dev->mii;
1344 	int ret;
1345 
1346 	netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1347 
1348 	/* read to clear */
1349 	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1350 	if (ret < 0)
1351 		return ret;
1352 
1353 	/* enable interrupt source */
1354 	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1355 	if (ret < 0)
1356 		return ret;
1357 
1358 	ret |= mask;
1359 
1360 	smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1361 
1362 	return 0;
1363 }
1364 
1365 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1366 {
1367 	struct mii_if_info *mii = &dev->mii;
1368 	int ret;
1369 
1370 	/* first, a dummy read, needed to latch some MII phys */
1371 	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1372 	if (ret < 0)
1373 		return ret;
1374 
1375 	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1376 	if (ret < 0)
1377 		return ret;
1378 
1379 	return !!(ret & BMSR_LSTATUS);
1380 }
1381 
1382 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1383 {
1384 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1385 	u32 val;
1386 	int ret;
1387 
1388 	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1389 	if (ret < 0)
1390 		return ret;
1391 
1392 	val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1393 	val |= PM_CTL_SUS_MODE_0;
1394 
1395 	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1396 	if (ret < 0)
1397 		return ret;
1398 
1399 	/* clear wol status */
1400 	val &= ~PM_CTL_WUPS_;
1401 	val |= PM_CTL_WUPS_WOL_;
1402 
1403 	/* enable energy detection */
1404 	if (pdata->wolopts & WAKE_PHY)
1405 		val |= PM_CTL_WUPS_ED_;
1406 
1407 	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1408 	if (ret < 0)
1409 		return ret;
1410 
1411 	/* read back PM_CTRL */
1412 	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1413 	if (ret < 0)
1414 		return ret;
1415 
1416 	pdata->suspend_flags |= SUSPEND_SUSPEND0;
1417 
1418 	return 0;
1419 }
1420 
1421 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1422 {
1423 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1424 	struct mii_if_info *mii = &dev->mii;
1425 	u32 val;
1426 	int ret;
1427 
1428 	/* reconfigure link pulse detection timing for
1429 	 * compatibility with non-standard link partners
1430 	 */
1431 	if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1432 		smsc95xx_mdio_write_nopm(dev->net, mii->phy_id,	PHY_EDPD_CONFIG,
1433 			PHY_EDPD_CONFIG_DEFAULT);
1434 
1435 	/* enable energy detect power-down mode */
1436 	ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1437 	if (ret < 0)
1438 		return ret;
1439 
1440 	ret |= MODE_CTRL_STS_EDPWRDOWN_;
1441 
1442 	smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1443 
1444 	/* enter SUSPEND1 mode */
1445 	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1446 	if (ret < 0)
1447 		return ret;
1448 
1449 	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1450 	val |= PM_CTL_SUS_MODE_1;
1451 
1452 	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1453 	if (ret < 0)
1454 		return ret;
1455 
1456 	/* clear wol status, enable energy detection */
1457 	val &= ~PM_CTL_WUPS_;
1458 	val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1459 
1460 	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1461 	if (ret < 0)
1462 		return ret;
1463 
1464 	pdata->suspend_flags |= SUSPEND_SUSPEND1;
1465 
1466 	return 0;
1467 }
1468 
1469 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1470 {
1471 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1472 	u32 val;
1473 	int ret;
1474 
1475 	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1476 	if (ret < 0)
1477 		return ret;
1478 
1479 	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1480 	val |= PM_CTL_SUS_MODE_2;
1481 
1482 	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1483 	if (ret < 0)
1484 		return ret;
1485 
1486 	pdata->suspend_flags |= SUSPEND_SUSPEND2;
1487 
1488 	return 0;
1489 }
1490 
1491 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1492 {
1493 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1494 	u32 val;
1495 	int ret;
1496 
1497 	ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1498 	if (ret < 0)
1499 		return ret;
1500 
1501 	if (val & 0xFFFF) {
1502 		netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1503 		return -EBUSY;
1504 	}
1505 
1506 	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1507 	if (ret < 0)
1508 		return ret;
1509 
1510 	val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1511 	val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1512 
1513 	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1514 	if (ret < 0)
1515 		return ret;
1516 
1517 	/* clear wol status */
1518 	val &= ~PM_CTL_WUPS_;
1519 	val |= PM_CTL_WUPS_WOL_;
1520 
1521 	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1522 	if (ret < 0)
1523 		return ret;
1524 
1525 	pdata->suspend_flags |= SUSPEND_SUSPEND3;
1526 
1527 	return 0;
1528 }
1529 
1530 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1531 {
1532 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1533 	int ret;
1534 
1535 	if (!netif_running(dev->net)) {
1536 		/* interface is ifconfig down so fully power down hw */
1537 		netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1538 		return smsc95xx_enter_suspend2(dev);
1539 	}
1540 
1541 	if (!link_up) {
1542 		/* link is down so enter EDPD mode, but only if device can
1543 		 * reliably resume from it.  This check should be redundant
1544 		 * as current FEATURE_REMOTE_WAKEUP parts also support
1545 		 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1546 		if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1547 			netdev_warn(dev->net, "EDPD not supported\n");
1548 			return -EBUSY;
1549 		}
1550 
1551 		netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1552 
1553 		/* enable PHY wakeup events for if cable is attached */
1554 		ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1555 			PHY_INT_MASK_ANEG_COMP_);
1556 		if (ret < 0) {
1557 			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1558 			return ret;
1559 		}
1560 
1561 		netdev_info(dev->net, "entering SUSPEND1 mode\n");
1562 		return smsc95xx_enter_suspend1(dev);
1563 	}
1564 
1565 	/* enable PHY wakeup events so we remote wakeup if cable is pulled */
1566 	ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1567 		PHY_INT_MASK_LINK_DOWN_);
1568 	if (ret < 0) {
1569 		netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1570 		return ret;
1571 	}
1572 
1573 	netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1574 	return smsc95xx_enter_suspend3(dev);
1575 }
1576 
1577 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1578 {
1579 	struct usbnet *dev = usb_get_intfdata(intf);
1580 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1581 	u32 val, link_up;
1582 	int ret;
1583 
1584 	ret = usbnet_suspend(intf, message);
1585 	if (ret < 0) {
1586 		netdev_warn(dev->net, "usbnet_suspend error\n");
1587 		return ret;
1588 	}
1589 
1590 	if (pdata->suspend_flags) {
1591 		netdev_warn(dev->net, "error during last resume\n");
1592 		pdata->suspend_flags = 0;
1593 	}
1594 
1595 	/* determine if link is up using only _nopm functions */
1596 	link_up = smsc95xx_link_ok_nopm(dev);
1597 
1598 	if (message.event == PM_EVENT_AUTO_SUSPEND &&
1599 	    (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1600 		ret = smsc95xx_autosuspend(dev, link_up);
1601 		goto done;
1602 	}
1603 
1604 	/* if we get this far we're not autosuspending */
1605 	/* if no wol options set, or if link is down and we're not waking on
1606 	 * PHY activity, enter lowest power SUSPEND2 mode
1607 	 */
1608 	if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1609 		!(link_up || (pdata->wolopts & WAKE_PHY))) {
1610 		netdev_info(dev->net, "entering SUSPEND2 mode\n");
1611 
1612 		/* disable energy detect (link up) & wake up events */
1613 		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1614 		if (ret < 0)
1615 			goto done;
1616 
1617 		val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1618 
1619 		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1620 		if (ret < 0)
1621 			goto done;
1622 
1623 		ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1624 		if (ret < 0)
1625 			goto done;
1626 
1627 		val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1628 
1629 		ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1630 		if (ret < 0)
1631 			goto done;
1632 
1633 		ret = smsc95xx_enter_suspend2(dev);
1634 		goto done;
1635 	}
1636 
1637 	if (pdata->wolopts & WAKE_PHY) {
1638 		ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1639 			(PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1640 		if (ret < 0) {
1641 			netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1642 			goto done;
1643 		}
1644 
1645 		/* if link is down then configure EDPD and enter SUSPEND1,
1646 		 * otherwise enter SUSPEND0 below
1647 		 */
1648 		if (!link_up) {
1649 			netdev_info(dev->net, "entering SUSPEND1 mode\n");
1650 			ret = smsc95xx_enter_suspend1(dev);
1651 			goto done;
1652 		}
1653 	}
1654 
1655 	if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1656 		u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1657 		u32 command[2];
1658 		u32 offset[2];
1659 		u32 crc[4];
1660 		int wuff_filter_count =
1661 			(pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1662 			LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1663 		int i, filter = 0;
1664 
1665 		if (!filter_mask) {
1666 			netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1667 			ret = -ENOMEM;
1668 			goto done;
1669 		}
1670 
1671 		memset(command, 0, sizeof(command));
1672 		memset(offset, 0, sizeof(offset));
1673 		memset(crc, 0, sizeof(crc));
1674 
1675 		if (pdata->wolopts & WAKE_BCAST) {
1676 			const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1677 			netdev_info(dev->net, "enabling broadcast detection\n");
1678 			filter_mask[filter * 4] = 0x003F;
1679 			filter_mask[filter * 4 + 1] = 0x00;
1680 			filter_mask[filter * 4 + 2] = 0x00;
1681 			filter_mask[filter * 4 + 3] = 0x00;
1682 			command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1683 			offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1684 			crc[filter/2] |= smsc_crc(bcast, 6, filter);
1685 			filter++;
1686 		}
1687 
1688 		if (pdata->wolopts & WAKE_MCAST) {
1689 			const u8 mcast[] = {0x01, 0x00, 0x5E};
1690 			netdev_info(dev->net, "enabling multicast detection\n");
1691 			filter_mask[filter * 4] = 0x0007;
1692 			filter_mask[filter * 4 + 1] = 0x00;
1693 			filter_mask[filter * 4 + 2] = 0x00;
1694 			filter_mask[filter * 4 + 3] = 0x00;
1695 			command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1696 			offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1697 			crc[filter/2] |= smsc_crc(mcast, 3, filter);
1698 			filter++;
1699 		}
1700 
1701 		if (pdata->wolopts & WAKE_ARP) {
1702 			const u8 arp[] = {0x08, 0x06};
1703 			netdev_info(dev->net, "enabling ARP detection\n");
1704 			filter_mask[filter * 4] = 0x0003;
1705 			filter_mask[filter * 4 + 1] = 0x00;
1706 			filter_mask[filter * 4 + 2] = 0x00;
1707 			filter_mask[filter * 4 + 3] = 0x00;
1708 			command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1709 			offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1710 			crc[filter/2] |= smsc_crc(arp, 2, filter);
1711 			filter++;
1712 		}
1713 
1714 		if (pdata->wolopts & WAKE_UCAST) {
1715 			netdev_info(dev->net, "enabling unicast detection\n");
1716 			filter_mask[filter * 4] = 0x003F;
1717 			filter_mask[filter * 4 + 1] = 0x00;
1718 			filter_mask[filter * 4 + 2] = 0x00;
1719 			filter_mask[filter * 4 + 3] = 0x00;
1720 			command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1721 			offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1722 			crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1723 			filter++;
1724 		}
1725 
1726 		for (i = 0; i < (wuff_filter_count * 4); i++) {
1727 			ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1728 			if (ret < 0) {
1729 				kfree(filter_mask);
1730 				goto done;
1731 			}
1732 		}
1733 		kfree(filter_mask);
1734 
1735 		for (i = 0; i < (wuff_filter_count / 4); i++) {
1736 			ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1737 			if (ret < 0)
1738 				goto done;
1739 		}
1740 
1741 		for (i = 0; i < (wuff_filter_count / 4); i++) {
1742 			ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1743 			if (ret < 0)
1744 				goto done;
1745 		}
1746 
1747 		for (i = 0; i < (wuff_filter_count / 2); i++) {
1748 			ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1749 			if (ret < 0)
1750 				goto done;
1751 		}
1752 
1753 		/* clear any pending pattern match packet status */
1754 		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1755 		if (ret < 0)
1756 			goto done;
1757 
1758 		val |= WUCSR_WUFR_;
1759 
1760 		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1761 		if (ret < 0)
1762 			goto done;
1763 	}
1764 
1765 	if (pdata->wolopts & WAKE_MAGIC) {
1766 		/* clear any pending magic packet status */
1767 		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1768 		if (ret < 0)
1769 			goto done;
1770 
1771 		val |= WUCSR_MPR_;
1772 
1773 		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1774 		if (ret < 0)
1775 			goto done;
1776 	}
1777 
1778 	/* enable/disable wakeup sources */
1779 	ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1780 	if (ret < 0)
1781 		goto done;
1782 
1783 	if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1784 		netdev_info(dev->net, "enabling pattern match wakeup\n");
1785 		val |= WUCSR_WAKE_EN_;
1786 	} else {
1787 		netdev_info(dev->net, "disabling pattern match wakeup\n");
1788 		val &= ~WUCSR_WAKE_EN_;
1789 	}
1790 
1791 	if (pdata->wolopts & WAKE_MAGIC) {
1792 		netdev_info(dev->net, "enabling magic packet wakeup\n");
1793 		val |= WUCSR_MPEN_;
1794 	} else {
1795 		netdev_info(dev->net, "disabling magic packet wakeup\n");
1796 		val &= ~WUCSR_MPEN_;
1797 	}
1798 
1799 	ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1800 	if (ret < 0)
1801 		goto done;
1802 
1803 	/* enable wol wakeup source */
1804 	ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1805 	if (ret < 0)
1806 		goto done;
1807 
1808 	val |= PM_CTL_WOL_EN_;
1809 
1810 	/* phy energy detect wakeup source */
1811 	if (pdata->wolopts & WAKE_PHY)
1812 		val |= PM_CTL_ED_EN_;
1813 
1814 	ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1815 	if (ret < 0)
1816 		goto done;
1817 
1818 	/* enable receiver to enable frame reception */
1819 	smsc95xx_start_rx_path(dev, 1);
1820 
1821 	/* some wol options are enabled, so enter SUSPEND0 */
1822 	netdev_info(dev->net, "entering SUSPEND0 mode\n");
1823 	ret = smsc95xx_enter_suspend0(dev);
1824 
1825 done:
1826 	/*
1827 	 * TODO: resume() might need to handle the suspend failure
1828 	 * in system sleep
1829 	 */
1830 	if (ret && PMSG_IS_AUTO(message))
1831 		usbnet_resume(intf);
1832 	return ret;
1833 }
1834 
1835 static int smsc95xx_resume(struct usb_interface *intf)
1836 {
1837 	struct usbnet *dev = usb_get_intfdata(intf);
1838 	struct smsc95xx_priv *pdata;
1839 	u8 suspend_flags;
1840 	int ret;
1841 	u32 val;
1842 
1843 	BUG_ON(!dev);
1844 	pdata = (struct smsc95xx_priv *)(dev->data[0]);
1845 	suspend_flags = pdata->suspend_flags;
1846 
1847 	netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1848 
1849 	/* do this first to ensure it's cleared even in error case */
1850 	pdata->suspend_flags = 0;
1851 	schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1852 
1853 	if (suspend_flags & SUSPEND_ALLMODES) {
1854 		/* clear wake-up sources */
1855 		ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1856 		if (ret < 0)
1857 			return ret;
1858 
1859 		val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1860 
1861 		ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1862 		if (ret < 0)
1863 			return ret;
1864 
1865 		/* clear wake-up status */
1866 		ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1867 		if (ret < 0)
1868 			return ret;
1869 
1870 		val &= ~PM_CTL_WOL_EN_;
1871 		val |= PM_CTL_WUPS_;
1872 
1873 		ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1874 		if (ret < 0)
1875 			return ret;
1876 	}
1877 
1878 	ret = usbnet_resume(intf);
1879 	if (ret < 0)
1880 		netdev_warn(dev->net, "usbnet_resume error\n");
1881 
1882 	return ret;
1883 }
1884 
1885 static int smsc95xx_reset_resume(struct usb_interface *intf)
1886 {
1887 	struct usbnet *dev = usb_get_intfdata(intf);
1888 	int ret;
1889 
1890 	ret = smsc95xx_reset(dev);
1891 	if (ret < 0)
1892 		return ret;
1893 
1894 	return smsc95xx_resume(intf);
1895 }
1896 
1897 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1898 {
1899 	skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1900 	skb->ip_summed = CHECKSUM_COMPLETE;
1901 	skb_trim(skb, skb->len - 2);
1902 }
1903 
1904 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1905 {
1906 	/* This check is no longer done by usbnet */
1907 	if (skb->len < dev->net->hard_header_len)
1908 		return 0;
1909 
1910 	while (skb->len > 0) {
1911 		u32 header, align_count;
1912 		struct sk_buff *ax_skb;
1913 		unsigned char *packet;
1914 		u16 size;
1915 
1916 		memcpy(&header, skb->data, sizeof(header));
1917 		le32_to_cpus(&header);
1918 		skb_pull(skb, 4 + NET_IP_ALIGN);
1919 		packet = skb->data;
1920 
1921 		/* get the packet length */
1922 		size = (u16)((header & RX_STS_FL_) >> 16);
1923 		align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1924 
1925 		if (unlikely(header & RX_STS_ES_)) {
1926 			netif_dbg(dev, rx_err, dev->net,
1927 				  "Error header=0x%08x\n", header);
1928 			dev->net->stats.rx_errors++;
1929 			dev->net->stats.rx_dropped++;
1930 
1931 			if (header & RX_STS_CRC_) {
1932 				dev->net->stats.rx_crc_errors++;
1933 			} else {
1934 				if (header & (RX_STS_TL_ | RX_STS_RF_))
1935 					dev->net->stats.rx_frame_errors++;
1936 
1937 				if ((header & RX_STS_LE_) &&
1938 					(!(header & RX_STS_FT_)))
1939 					dev->net->stats.rx_length_errors++;
1940 			}
1941 		} else {
1942 			/* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1943 			if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1944 				netif_dbg(dev, rx_err, dev->net,
1945 					  "size err header=0x%08x\n", header);
1946 				return 0;
1947 			}
1948 
1949 			/* last frame in this batch */
1950 			if (skb->len == size) {
1951 				if (dev->net->features & NETIF_F_RXCSUM)
1952 					smsc95xx_rx_csum_offload(skb);
1953 				skb_trim(skb, skb->len - 4); /* remove fcs */
1954 				skb->truesize = size + sizeof(struct sk_buff);
1955 
1956 				return 1;
1957 			}
1958 
1959 			ax_skb = skb_clone(skb, GFP_ATOMIC);
1960 			if (unlikely(!ax_skb)) {
1961 				netdev_warn(dev->net, "Error allocating skb\n");
1962 				return 0;
1963 			}
1964 
1965 			ax_skb->len = size;
1966 			ax_skb->data = packet;
1967 			skb_set_tail_pointer(ax_skb, size);
1968 
1969 			if (dev->net->features & NETIF_F_RXCSUM)
1970 				smsc95xx_rx_csum_offload(ax_skb);
1971 			skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1972 			ax_skb->truesize = size + sizeof(struct sk_buff);
1973 
1974 			usbnet_skb_return(dev, ax_skb);
1975 		}
1976 
1977 		skb_pull(skb, size);
1978 
1979 		/* padding bytes before the next frame starts */
1980 		if (skb->len)
1981 			skb_pull(skb, align_count);
1982 	}
1983 
1984 	return 1;
1985 }
1986 
1987 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1988 {
1989 	u16 low_16 = (u16)skb_checksum_start_offset(skb);
1990 	u16 high_16 = low_16 + skb->csum_offset;
1991 	return (high_16 << 16) | low_16;
1992 }
1993 
1994 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1995 					 struct sk_buff *skb, gfp_t flags)
1996 {
1997 	bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1998 	int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1999 	u32 tx_cmd_a, tx_cmd_b;
2000 
2001 	/* We do not advertise SG, so skbs should be already linearized */
2002 	BUG_ON(skb_shinfo(skb)->nr_frags);
2003 
2004 	if (skb_headroom(skb) < overhead) {
2005 		struct sk_buff *skb2 = skb_copy_expand(skb,
2006 			overhead, 0, flags);
2007 		dev_kfree_skb_any(skb);
2008 		skb = skb2;
2009 		if (!skb)
2010 			return NULL;
2011 	}
2012 
2013 	if (csum) {
2014 		if (skb->len <= 45) {
2015 			/* workaround - hardware tx checksum does not work
2016 			 * properly with extremely small packets */
2017 			long csstart = skb_checksum_start_offset(skb);
2018 			__wsum calc = csum_partial(skb->data + csstart,
2019 				skb->len - csstart, 0);
2020 			*((__sum16 *)(skb->data + csstart
2021 				+ skb->csum_offset)) = csum_fold(calc);
2022 
2023 			csum = false;
2024 		} else {
2025 			u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2026 			skb_push(skb, 4);
2027 			cpu_to_le32s(&csum_preamble);
2028 			memcpy(skb->data, &csum_preamble, 4);
2029 		}
2030 	}
2031 
2032 	skb_push(skb, 4);
2033 	tx_cmd_b = (u32)(skb->len - 4);
2034 	if (csum)
2035 		tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2036 	cpu_to_le32s(&tx_cmd_b);
2037 	memcpy(skb->data, &tx_cmd_b, 4);
2038 
2039 	skb_push(skb, 4);
2040 	tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2041 		TX_CMD_A_LAST_SEG_;
2042 	cpu_to_le32s(&tx_cmd_a);
2043 	memcpy(skb->data, &tx_cmd_a, 4);
2044 
2045 	return skb;
2046 }
2047 
2048 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2049 {
2050 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2051 
2052 	dev->intf->needs_remote_wakeup = on;
2053 
2054 	if (pdata->features & FEATURE_REMOTE_WAKEUP)
2055 		return 0;
2056 
2057 	/* this chip revision isn't capable of remote wakeup */
2058 	netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2059 
2060 	if (on)
2061 		usb_autopm_get_interface_no_resume(dev->intf);
2062 	else
2063 		usb_autopm_put_interface(dev->intf);
2064 
2065 	return 0;
2066 }
2067 
2068 static const struct driver_info smsc95xx_info = {
2069 	.description	= "smsc95xx USB 2.0 Ethernet",
2070 	.bind		= smsc95xx_bind,
2071 	.unbind		= smsc95xx_unbind,
2072 	.link_reset	= smsc95xx_link_reset,
2073 	.reset		= smsc95xx_reset,
2074 	.rx_fixup	= smsc95xx_rx_fixup,
2075 	.tx_fixup	= smsc95xx_tx_fixup,
2076 	.status		= smsc95xx_status,
2077 	.manage_power	= smsc95xx_manage_power,
2078 	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2079 };
2080 
2081 static const struct usb_device_id products[] = {
2082 	{
2083 		/* SMSC9500 USB Ethernet Device */
2084 		USB_DEVICE(0x0424, 0x9500),
2085 		.driver_info = (unsigned long) &smsc95xx_info,
2086 	},
2087 	{
2088 		/* SMSC9505 USB Ethernet Device */
2089 		USB_DEVICE(0x0424, 0x9505),
2090 		.driver_info = (unsigned long) &smsc95xx_info,
2091 	},
2092 	{
2093 		/* SMSC9500A USB Ethernet Device */
2094 		USB_DEVICE(0x0424, 0x9E00),
2095 		.driver_info = (unsigned long) &smsc95xx_info,
2096 	},
2097 	{
2098 		/* SMSC9505A USB Ethernet Device */
2099 		USB_DEVICE(0x0424, 0x9E01),
2100 		.driver_info = (unsigned long) &smsc95xx_info,
2101 	},
2102 	{
2103 		/* SMSC9512/9514 USB Hub & Ethernet Device */
2104 		USB_DEVICE(0x0424, 0xec00),
2105 		.driver_info = (unsigned long) &smsc95xx_info,
2106 	},
2107 	{
2108 		/* SMSC9500 USB Ethernet Device (SAL10) */
2109 		USB_DEVICE(0x0424, 0x9900),
2110 		.driver_info = (unsigned long) &smsc95xx_info,
2111 	},
2112 	{
2113 		/* SMSC9505 USB Ethernet Device (SAL10) */
2114 		USB_DEVICE(0x0424, 0x9901),
2115 		.driver_info = (unsigned long) &smsc95xx_info,
2116 	},
2117 	{
2118 		/* SMSC9500A USB Ethernet Device (SAL10) */
2119 		USB_DEVICE(0x0424, 0x9902),
2120 		.driver_info = (unsigned long) &smsc95xx_info,
2121 	},
2122 	{
2123 		/* SMSC9505A USB Ethernet Device (SAL10) */
2124 		USB_DEVICE(0x0424, 0x9903),
2125 		.driver_info = (unsigned long) &smsc95xx_info,
2126 	},
2127 	{
2128 		/* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2129 		USB_DEVICE(0x0424, 0x9904),
2130 		.driver_info = (unsigned long) &smsc95xx_info,
2131 	},
2132 	{
2133 		/* SMSC9500A USB Ethernet Device (HAL) */
2134 		USB_DEVICE(0x0424, 0x9905),
2135 		.driver_info = (unsigned long) &smsc95xx_info,
2136 	},
2137 	{
2138 		/* SMSC9505A USB Ethernet Device (HAL) */
2139 		USB_DEVICE(0x0424, 0x9906),
2140 		.driver_info = (unsigned long) &smsc95xx_info,
2141 	},
2142 	{
2143 		/* SMSC9500 USB Ethernet Device (Alternate ID) */
2144 		USB_DEVICE(0x0424, 0x9907),
2145 		.driver_info = (unsigned long) &smsc95xx_info,
2146 	},
2147 	{
2148 		/* SMSC9500A USB Ethernet Device (Alternate ID) */
2149 		USB_DEVICE(0x0424, 0x9908),
2150 		.driver_info = (unsigned long) &smsc95xx_info,
2151 	},
2152 	{
2153 		/* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2154 		USB_DEVICE(0x0424, 0x9909),
2155 		.driver_info = (unsigned long) &smsc95xx_info,
2156 	},
2157 	{
2158 		/* SMSC LAN9530 USB Ethernet Device */
2159 		USB_DEVICE(0x0424, 0x9530),
2160 		.driver_info = (unsigned long) &smsc95xx_info,
2161 	},
2162 	{
2163 		/* SMSC LAN9730 USB Ethernet Device */
2164 		USB_DEVICE(0x0424, 0x9730),
2165 		.driver_info = (unsigned long) &smsc95xx_info,
2166 	},
2167 	{
2168 		/* SMSC LAN89530 USB Ethernet Device */
2169 		USB_DEVICE(0x0424, 0x9E08),
2170 		.driver_info = (unsigned long) &smsc95xx_info,
2171 	},
2172 	{ },		/* END */
2173 };
2174 MODULE_DEVICE_TABLE(usb, products);
2175 
2176 static struct usb_driver smsc95xx_driver = {
2177 	.name		= "smsc95xx",
2178 	.id_table	= products,
2179 	.probe		= usbnet_probe,
2180 	.suspend	= smsc95xx_suspend,
2181 	.resume		= smsc95xx_resume,
2182 	.reset_resume	= smsc95xx_reset_resume,
2183 	.disconnect	= usbnet_disconnect,
2184 	.disable_hub_initiated_lpm = 1,
2185 	.supports_autosuspend = 1,
2186 };
2187 
2188 module_usb_driver(smsc95xx_driver);
2189 
2190 MODULE_AUTHOR("Nancy Lin");
2191 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2192 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2193 MODULE_LICENSE("GPL");
2194