xref: /linux/drivers/net/usb/mcs7830.c (revision b889fcf63cb62e7fdb7816565e28f44dbe4a76a5)
1 /*
2  * MOSCHIP MCS7830 based (7730/7830/7832) USB 2.0 Ethernet Devices
3  *
4  * based on usbnet.c, asix.c and the vendor provided mcs7830 driver
5  *
6  * Copyright (C) 2010 Andreas Mohr <andi@lisas.de>
7  * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>
8  * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
9  * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
10  * Copyright (c) 2002-2003 TiVo Inc.
11  *
12  * Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!).
13  *
14  * 2010-12-19: add 7832 USB PID ("functionality same as MCS7830"),
15  *             per active notification by manufacturer
16  *
17  * TODO:
18  * - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?)
19  * - implement ethtool_ops get_pauseparam/set_pauseparam
20  *   via HIF_REG_PAUSE_THRESHOLD (>= revision C only!)
21  * - implement get_eeprom/[set_eeprom]
22  * - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII)
23  * - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs,
24  *   can access only ~ 24, remaining user buffer is uninitialized garbage
25  * - anything else?
26  *
27  *
28  * This program is free software; you can redistribute it and/or modify
29  * it under the terms of the GNU General Public License as published by
30  * the Free Software Foundation; either version 2 of the License, or
31  * (at your option) any later version.
32  *
33  * This program is distributed in the hope that it will be useful,
34  * but WITHOUT ANY WARRANTY; without even the implied warranty of
35  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
36  * GNU General Public License for more details.
37  *
38  * You should have received a copy of the GNU General Public License
39  * along with this program; if not, write to the Free Software
40  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
41  */
42 
43 #include <linux/crc32.h>
44 #include <linux/etherdevice.h>
45 #include <linux/ethtool.h>
46 #include <linux/init.h>
47 #include <linux/mii.h>
48 #include <linux/module.h>
49 #include <linux/netdevice.h>
50 #include <linux/slab.h>
51 #include <linux/usb.h>
52 #include <linux/usb/usbnet.h>
53 
54 /* requests */
55 #define MCS7830_RD_BMREQ	(USB_DIR_IN  | USB_TYPE_VENDOR | \
56 				 USB_RECIP_DEVICE)
57 #define MCS7830_WR_BMREQ	(USB_DIR_OUT | USB_TYPE_VENDOR | \
58 				 USB_RECIP_DEVICE)
59 #define MCS7830_RD_BREQ		0x0E
60 #define MCS7830_WR_BREQ		0x0D
61 
62 #define MCS7830_CTRL_TIMEOUT	1000
63 #define MCS7830_MAX_MCAST	64
64 
65 #define MCS7830_VENDOR_ID	0x9710
66 #define MCS7832_PRODUCT_ID	0x7832
67 #define MCS7830_PRODUCT_ID	0x7830
68 #define MCS7730_PRODUCT_ID	0x7730
69 
70 #define SITECOM_VENDOR_ID	0x0DF6
71 #define LN_030_PRODUCT_ID	0x0021
72 
73 #define MCS7830_MII_ADVERTISE	(ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
74 				 ADVERTISE_100HALF | ADVERTISE_10FULL | \
75 				 ADVERTISE_10HALF | ADVERTISE_CSMA)
76 
77 /* HIF_REG_XX corresponding index value */
78 enum {
79 	HIF_REG_MULTICAST_HASH			= 0x00,
80 	HIF_REG_PACKET_GAP1			= 0x08,
81 	HIF_REG_PACKET_GAP2			= 0x09,
82 	HIF_REG_PHY_DATA			= 0x0a,
83 	HIF_REG_PHY_CMD1			= 0x0c,
84 	   HIF_REG_PHY_CMD1_READ		= 0x40,
85 	   HIF_REG_PHY_CMD1_WRITE		= 0x20,
86 	   HIF_REG_PHY_CMD1_PHYADDR		= 0x01,
87 	HIF_REG_PHY_CMD2			= 0x0d,
88 	   HIF_REG_PHY_CMD2_PEND_FLAG_BIT	= 0x80,
89 	   HIF_REG_PHY_CMD2_READY_FLAG_BIT	= 0x40,
90 	HIF_REG_CONFIG				= 0x0e,
91 	/* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */
92 	   HIF_REG_CONFIG_CFG			= 0x80,
93 	   HIF_REG_CONFIG_SPEED100		= 0x40,
94 	   HIF_REG_CONFIG_FULLDUPLEX_ENABLE	= 0x20,
95 	   HIF_REG_CONFIG_RXENABLE		= 0x10,
96 	   HIF_REG_CONFIG_TXENABLE		= 0x08,
97 	   HIF_REG_CONFIG_SLEEPMODE		= 0x04,
98 	   HIF_REG_CONFIG_ALLMULTICAST		= 0x02,
99 	   HIF_REG_CONFIG_PROMISCUOUS		= 0x01,
100 	HIF_REG_ETHERNET_ADDR			= 0x0f,
101 	HIF_REG_FRAME_DROP_COUNTER		= 0x15, /* 0..ff; reset: 0 */
102 	HIF_REG_PAUSE_THRESHOLD			= 0x16,
103 	   HIF_REG_PAUSE_THRESHOLD_DEFAULT	= 0,
104 };
105 
106 /* Trailing status byte in Ethernet Rx frame */
107 enum {
108 	MCS7830_RX_SHORT_FRAME		= 0x01, /* < 64 bytes */
109 	MCS7830_RX_LENGTH_ERROR		= 0x02, /* framelen != Ethernet length field */
110 	MCS7830_RX_ALIGNMENT_ERROR	= 0x04, /* non-even number of nibbles */
111 	MCS7830_RX_CRC_ERROR		= 0x08,
112 	MCS7830_RX_LARGE_FRAME		= 0x10, /* > 1518 bytes */
113 	MCS7830_RX_FRAME_CORRECT	= 0x20, /* frame is correct */
114 	/* [7:6] reserved */
115 };
116 
117 struct mcs7830_data {
118 	u8 multi_filter[8];
119 	u8 config;
120 	u8 link_counter;
121 };
122 
123 static const char driver_name[] = "MOSCHIP usb-ethernet driver";
124 
125 static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
126 {
127 	return usbnet_read_cmd(dev, MCS7830_RD_BREQ, MCS7830_RD_BMREQ,
128 				0x0000, index, data, size);
129 }
130 
131 static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data)
132 {
133 	return usbnet_write_cmd(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
134 				0x0000, index, data, size);
135 }
136 
137 static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
138 {
139 	usbnet_write_cmd_async(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
140 				0x0000, index, data, size);
141 }
142 
143 static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr)
144 {
145 	int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
146 	if (ret < 0)
147 		return ret;
148 	return 0;
149 }
150 
151 static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr)
152 {
153 	int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
154 
155 	if (ret < 0)
156 		return ret;
157 	return 0;
158 }
159 
160 static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
161 {
162 	int ret;
163 	struct usbnet *dev = netdev_priv(netdev);
164 	struct sockaddr *addr = p;
165 
166 	if (netif_running(netdev))
167 		return -EBUSY;
168 
169 	if (!is_valid_ether_addr(addr->sa_data))
170 		return -EADDRNOTAVAIL;
171 
172 	ret = mcs7830_hif_set_mac_address(dev, addr->sa_data);
173 
174 	if (ret < 0)
175 		return ret;
176 
177 	/* it worked --> adopt it on netdev side */
178 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
179 
180 	return 0;
181 }
182 
183 static int mcs7830_read_phy(struct usbnet *dev, u8 index)
184 {
185 	int ret;
186 	int i;
187 	__le16 val;
188 
189 	u8 cmd[2] = {
190 		HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
191 		HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
192 	};
193 
194 	mutex_lock(&dev->phy_mutex);
195 	/* write the MII command */
196 	ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
197 	if (ret < 0)
198 		goto out;
199 
200 	/* wait for the data to become valid, should be within < 1ms */
201 	for (i = 0; i < 10; i++) {
202 		ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
203 		if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
204 			break;
205 		ret = -EIO;
206 		msleep(1);
207 	}
208 	if (ret < 0)
209 		goto out;
210 
211 	/* read actual register contents */
212 	ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
213 	if (ret < 0)
214 		goto out;
215 	ret = le16_to_cpu(val);
216 	dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
217 		index, val, i);
218 out:
219 	mutex_unlock(&dev->phy_mutex);
220 	return ret;
221 }
222 
223 static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
224 {
225 	int ret;
226 	int i;
227 	__le16 le_val;
228 
229 	u8 cmd[2] = {
230 		HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
231 		HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
232 	};
233 
234 	mutex_lock(&dev->phy_mutex);
235 
236 	/* write the new register contents */
237 	le_val = cpu_to_le16(val);
238 	ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
239 	if (ret < 0)
240 		goto out;
241 
242 	/* write the MII command */
243 	ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
244 	if (ret < 0)
245 		goto out;
246 
247 	/* wait for the command to be accepted by the PHY */
248 	for (i = 0; i < 10; i++) {
249 		ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
250 		if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
251 			break;
252 		ret = -EIO;
253 		msleep(1);
254 	}
255 	if (ret < 0)
256 		goto out;
257 
258 	ret = 0;
259 	dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
260 		index, val, i);
261 out:
262 	mutex_unlock(&dev->phy_mutex);
263 	return ret;
264 }
265 
266 /*
267  * This algorithm comes from the original mcs7830 version 1.4 driver,
268  * not sure if it is needed.
269  */
270 static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
271 {
272 	int ret;
273 	/* Enable all media types */
274 	ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
275 
276 	/* First reset BMCR */
277 	if (!ret)
278 		ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
279 	/* Enable Auto Neg */
280 	if (!ret)
281 		ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
282 	/* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
283 	if (!ret)
284 		ret = mcs7830_write_phy(dev, MII_BMCR,
285 				BMCR_ANENABLE | BMCR_ANRESTART	);
286 	return ret;
287 }
288 
289 
290 /*
291  * if we can read register 22, the chip revision is C or higher
292  */
293 static int mcs7830_get_rev(struct usbnet *dev)
294 {
295 	u8 dummy[2];
296 	int ret;
297 	ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy);
298 	if (ret > 0)
299 		return 2; /* Rev C or later */
300 	return 1; /* earlier revision */
301 }
302 
303 /*
304  * On rev. C we need to set the pause threshold
305  */
306 static void mcs7830_rev_C_fixup(struct usbnet *dev)
307 {
308 	u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
309 	int retry;
310 
311 	for (retry = 0; retry < 2; retry++) {
312 		if (mcs7830_get_rev(dev) == 2) {
313 			dev_info(&dev->udev->dev, "applying rev.C fixup\n");
314 			mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
315 					1, &pause_threshold);
316 		}
317 		msleep(1);
318 	}
319 }
320 
321 static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
322 			     int location)
323 {
324 	struct usbnet *dev = netdev_priv(netdev);
325 	return mcs7830_read_phy(dev, location);
326 }
327 
328 static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
329 				int location, int val)
330 {
331 	struct usbnet *dev = netdev_priv(netdev);
332 	mcs7830_write_phy(dev, location, val);
333 }
334 
335 static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
336 {
337 	struct usbnet *dev = netdev_priv(net);
338 	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
339 }
340 
341 static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev)
342 {
343 	return (struct mcs7830_data *)&dev->data;
344 }
345 
346 static void mcs7830_hif_update_multicast_hash(struct usbnet *dev)
347 {
348 	struct mcs7830_data *data = mcs7830_get_data(dev);
349 	mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
350 				sizeof data->multi_filter,
351 				data->multi_filter);
352 }
353 
354 static void mcs7830_hif_update_config(struct usbnet *dev)
355 {
356 	/* implementation specific to data->config
357            (argument needs to be heap-based anyway - USB DMA!) */
358 	struct mcs7830_data *data = mcs7830_get_data(dev);
359 	mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
360 }
361 
362 static void mcs7830_data_set_multicast(struct net_device *net)
363 {
364 	struct usbnet *dev = netdev_priv(net);
365 	struct mcs7830_data *data = mcs7830_get_data(dev);
366 
367 	memset(data->multi_filter, 0, sizeof data->multi_filter);
368 
369 	data->config = HIF_REG_CONFIG_TXENABLE;
370 
371 	/* this should not be needed, but it doesn't work otherwise */
372 	data->config |= HIF_REG_CONFIG_ALLMULTICAST;
373 
374 	if (net->flags & IFF_PROMISC) {
375 		data->config |= HIF_REG_CONFIG_PROMISCUOUS;
376 	} else if (net->flags & IFF_ALLMULTI ||
377 		   netdev_mc_count(net) > MCS7830_MAX_MCAST) {
378 		data->config |= HIF_REG_CONFIG_ALLMULTICAST;
379 	} else if (netdev_mc_empty(net)) {
380 		/* just broadcast and directed */
381 	} else {
382 		/* We use the 20 byte dev->data
383 		 * for our 8 byte filter buffer
384 		 * to avoid allocating memory that
385 		 * is tricky to free later */
386 		struct netdev_hw_addr *ha;
387 		u32 crc_bits;
388 
389 		/* Build the multicast hash filter. */
390 		netdev_for_each_mc_addr(ha, net) {
391 			crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
392 			data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
393 		}
394 	}
395 }
396 
397 static int mcs7830_apply_base_config(struct usbnet *dev)
398 {
399 	int ret;
400 
401 	/* re-configure known MAC (suspend case etc.) */
402 	ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr);
403 	if (ret) {
404 		dev_info(&dev->udev->dev, "Cannot set MAC address\n");
405 		goto out;
406 	}
407 
408 	/* Set up PHY */
409 	ret = mcs7830_set_autoneg(dev, 0);
410 	if (ret) {
411 		dev_info(&dev->udev->dev, "Cannot set autoneg\n");
412 		goto out;
413 	}
414 
415 	mcs7830_hif_update_multicast_hash(dev);
416 	mcs7830_hif_update_config(dev);
417 
418 	mcs7830_rev_C_fixup(dev);
419 	ret = 0;
420 out:
421 	return ret;
422 }
423 
424 /* credits go to asix_set_multicast */
425 static void mcs7830_set_multicast(struct net_device *net)
426 {
427 	struct usbnet *dev = netdev_priv(net);
428 
429 	mcs7830_data_set_multicast(net);
430 
431 	mcs7830_hif_update_multicast_hash(dev);
432 	mcs7830_hif_update_config(dev);
433 }
434 
435 static int mcs7830_get_regs_len(struct net_device *net)
436 {
437 	struct usbnet *dev = netdev_priv(net);
438 
439 	switch (mcs7830_get_rev(dev)) {
440 	case 1:
441 		return 21;
442 	case 2:
443 		return 32;
444 	}
445 	return 0;
446 }
447 
448 static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
449 {
450 	usbnet_get_drvinfo(net, drvinfo);
451 	drvinfo->regdump_len = mcs7830_get_regs_len(net);
452 }
453 
454 static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
455 {
456 	struct usbnet *dev = netdev_priv(net);
457 
458 	regs->version = mcs7830_get_rev(dev);
459 	mcs7830_get_reg(dev, 0, regs->len, data);
460 }
461 
462 static const struct ethtool_ops mcs7830_ethtool_ops = {
463 	.get_drvinfo		= mcs7830_get_drvinfo,
464 	.get_regs_len		= mcs7830_get_regs_len,
465 	.get_regs		= mcs7830_get_regs,
466 
467 	/* common usbnet calls */
468 	.get_link		= usbnet_get_link,
469 	.get_msglevel		= usbnet_get_msglevel,
470 	.set_msglevel		= usbnet_set_msglevel,
471 	.get_settings		= usbnet_get_settings,
472 	.set_settings		= usbnet_set_settings,
473 	.nway_reset		= usbnet_nway_reset,
474 };
475 
476 static const struct net_device_ops mcs7830_netdev_ops = {
477 	.ndo_open		= usbnet_open,
478 	.ndo_stop		= usbnet_stop,
479 	.ndo_start_xmit		= usbnet_start_xmit,
480 	.ndo_tx_timeout		= usbnet_tx_timeout,
481 	.ndo_change_mtu		= usbnet_change_mtu,
482 	.ndo_validate_addr	= eth_validate_addr,
483 	.ndo_do_ioctl 		= mcs7830_ioctl,
484 	.ndo_set_rx_mode	= mcs7830_set_multicast,
485 	.ndo_set_mac_address	= mcs7830_set_mac_address,
486 };
487 
488 static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
489 {
490 	struct net_device *net = dev->net;
491 	int ret;
492 	int retry;
493 
494 	/* Initial startup: Gather MAC address setting from EEPROM */
495 	ret = -EINVAL;
496 	for (retry = 0; retry < 5 && ret; retry++)
497 		ret = mcs7830_hif_get_mac_address(dev, net->dev_addr);
498 	if (ret) {
499 		dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
500 		goto out;
501 	}
502 
503 	mcs7830_data_set_multicast(net);
504 
505 	ret = mcs7830_apply_base_config(dev);
506 	if (ret)
507 		goto out;
508 
509 	net->ethtool_ops = &mcs7830_ethtool_ops;
510 	net->netdev_ops = &mcs7830_netdev_ops;
511 
512 	/* reserve space for the status byte on rx */
513 	dev->rx_urb_size = ETH_FRAME_LEN + 1;
514 
515 	dev->mii.mdio_read = mcs7830_mdio_read;
516 	dev->mii.mdio_write = mcs7830_mdio_write;
517 	dev->mii.dev = net;
518 	dev->mii.phy_id_mask = 0x3f;
519 	dev->mii.reg_num_mask = 0x1f;
520 	dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
521 
522 	ret = usbnet_get_endpoints(dev, udev);
523 out:
524 	return ret;
525 }
526 
527 /* The chip always appends a status byte that we need to strip */
528 static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
529 {
530 	u8 status;
531 
532 	if (skb->len == 0) {
533 		dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
534 		return 0;
535 	}
536 
537 	skb_trim(skb, skb->len - 1);
538 	status = skb->data[skb->len];
539 
540 	if (status != MCS7830_RX_FRAME_CORRECT) {
541 		dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
542 
543 		/* hmm, perhaps usbnet.c already sees a globally visible
544 		   frame error and increments rx_errors on its own already? */
545 		dev->net->stats.rx_errors++;
546 
547 		if (status &	(MCS7830_RX_SHORT_FRAME
548 				|MCS7830_RX_LENGTH_ERROR
549 				|MCS7830_RX_LARGE_FRAME))
550 			dev->net->stats.rx_length_errors++;
551 		if (status & MCS7830_RX_ALIGNMENT_ERROR)
552 			dev->net->stats.rx_frame_errors++;
553 		if (status & MCS7830_RX_CRC_ERROR)
554 			dev->net->stats.rx_crc_errors++;
555 	}
556 
557 	return skb->len > 0;
558 }
559 
560 static void mcs7830_status(struct usbnet *dev, struct urb *urb)
561 {
562 	u8 *buf = urb->transfer_buffer;
563 	bool link, link_changed;
564 	struct mcs7830_data *data = mcs7830_get_data(dev);
565 
566 	if (urb->actual_length < 16)
567 		return;
568 
569 	link = !(buf[1] & 0x20);
570 	link_changed = netif_carrier_ok(dev->net) != link;
571 	if (link_changed) {
572 		data->link_counter++;
573 		/*
574 		   track link state 20 times to guard against erroneous
575 		   link state changes reported sometimes by the chip
576 		 */
577 		if (data->link_counter > 20) {
578 			data->link_counter = 0;
579 			if (link) {
580 				netif_carrier_on(dev->net);
581 				usbnet_defer_kevent(dev, EVENT_LINK_RESET);
582 			} else
583 				netif_carrier_off(dev->net);
584 			netdev_dbg(dev->net, "Link Status is: %d\n", link);
585 		}
586 	} else
587 		data->link_counter = 0;
588 }
589 
590 static const struct driver_info moschip_info = {
591 	.description	= "MOSCHIP 7830/7832/7730 usb-NET adapter",
592 	.bind		= mcs7830_bind,
593 	.rx_fixup	= mcs7830_rx_fixup,
594 	.flags		= FLAG_ETHER | FLAG_LINK_INTR,
595 	.status		= mcs7830_status,
596 	.in		= 1,
597 	.out		= 2,
598 };
599 
600 static const struct driver_info sitecom_info = {
601 	.description    = "Sitecom LN-30 usb-NET adapter",
602 	.bind		= mcs7830_bind,
603 	.rx_fixup	= mcs7830_rx_fixup,
604 	.flags		= FLAG_ETHER | FLAG_LINK_INTR,
605 	.status		= mcs7830_status,
606 	.in		= 1,
607 	.out		= 2,
608 };
609 
610 static const struct usb_device_id products[] = {
611 	{
612 		USB_DEVICE(MCS7830_VENDOR_ID, MCS7832_PRODUCT_ID),
613 		.driver_info = (unsigned long) &moschip_info,
614 	},
615 	{
616 		USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
617 		.driver_info = (unsigned long) &moschip_info,
618 	},
619 	{
620 		USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
621 		.driver_info = (unsigned long) &moschip_info,
622 	},
623 	{
624 		USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
625 		.driver_info = (unsigned long) &sitecom_info,
626 	},
627 	{},
628 };
629 MODULE_DEVICE_TABLE(usb, products);
630 
631 static int mcs7830_reset_resume (struct usb_interface *intf)
632 {
633  	/* YES, this function is successful enough that ethtool -d
634            does show same output pre-/post-suspend */
635 
636 	struct usbnet		*dev = usb_get_intfdata(intf);
637 
638 	mcs7830_apply_base_config(dev);
639 
640 	usbnet_resume(intf);
641 
642 	return 0;
643 }
644 
645 static struct usb_driver mcs7830_driver = {
646 	.name = driver_name,
647 	.id_table = products,
648 	.probe = usbnet_probe,
649 	.disconnect = usbnet_disconnect,
650 	.suspend = usbnet_suspend,
651 	.resume = usbnet_resume,
652 	.reset_resume = mcs7830_reset_resume,
653 	.disable_hub_initiated_lpm = 1,
654 };
655 
656 module_usb_driver(mcs7830_driver);
657 
658 MODULE_DESCRIPTION("USB to network adapter MCS7830)");
659 MODULE_LICENSE("GPL");
660