1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * MOSCHIP MCS7830 based (7730/7830/7832) USB 2.0 Ethernet Devices
4 *
5 * based on usbnet.c, asix.c and the vendor provided mcs7830 driver
6 *
7 * Copyright (C) 2010 Andreas Mohr <andi@lisas.de>
8 * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>
9 * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
10 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
11 * Copyright (c) 2002-2003 TiVo Inc.
12 *
13 * Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!).
14 *
15 * 2010-12-19: add 7832 USB PID ("functionality same as MCS7830"),
16 * per active notification by manufacturer
17 *
18 * TODO:
19 * - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?)
20 * - implement ethtool_ops get_pauseparam/set_pauseparam
21 * via HIF_REG_PAUSE_THRESHOLD (>= revision C only!)
22 * - implement get_eeprom/[set_eeprom]
23 * - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII)
24 * - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs,
25 * can access only ~ 24, remaining user buffer is uninitialized garbage
26 * - anything else?
27 */
28
29#include <linux/crc32.h>
30#include <linux/etherdevice.h>
31#include <linux/ethtool.h>
32#include <linux/mii.h>
33#include <linux/module.h>
34#include <linux/netdevice.h>
35#include <linux/slab.h>
36#include <linux/usb.h>
37#include <linux/usb/usbnet.h>
38
39/* requests */
40#define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \
41 USB_RECIP_DEVICE)
42#define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \
43 USB_RECIP_DEVICE)
44#define MCS7830_RD_BREQ 0x0E
45#define MCS7830_WR_BREQ 0x0D
46
47#define MCS7830_CTRL_TIMEOUT 1000
48#define MCS7830_MAX_MCAST 64
49
50#define MCS7830_VENDOR_ID 0x9710
51#define MCS7832_PRODUCT_ID 0x7832
52#define MCS7830_PRODUCT_ID 0x7830
53#define MCS7730_PRODUCT_ID 0x7730
54
55#define SITECOM_VENDOR_ID 0x0DF6
56#define LN_030_PRODUCT_ID 0x0021
57
58#define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
59 ADVERTISE_100HALF | ADVERTISE_10FULL | \
60 ADVERTISE_10HALF | ADVERTISE_CSMA)
61
62/* HIF_REG_XX corresponding index value */
63enum {
64 HIF_REG_MULTICAST_HASH = 0x00,
65 HIF_REG_PACKET_GAP1 = 0x08,
66 HIF_REG_PACKET_GAP2 = 0x09,
67 HIF_REG_PHY_DATA = 0x0a,
68 HIF_REG_PHY_CMD1 = 0x0c,
69 HIF_REG_PHY_CMD1_READ = 0x40,
70 HIF_REG_PHY_CMD1_WRITE = 0x20,
71 HIF_REG_PHY_CMD1_PHYADDR = 0x01,
72 HIF_REG_PHY_CMD2 = 0x0d,
73 HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80,
74 HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40,
75 HIF_REG_CONFIG = 0x0e,
76 /* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */
77 HIF_REG_CONFIG_CFG = 0x80,
78 HIF_REG_CONFIG_SPEED100 = 0x40,
79 HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20,
80 HIF_REG_CONFIG_RXENABLE = 0x10,
81 HIF_REG_CONFIG_TXENABLE = 0x08,
82 HIF_REG_CONFIG_SLEEPMODE = 0x04,
83 HIF_REG_CONFIG_ALLMULTICAST = 0x02,
84 HIF_REG_CONFIG_PROMISCUOUS = 0x01,
85 HIF_REG_ETHERNET_ADDR = 0x0f,
86 HIF_REG_FRAME_DROP_COUNTER = 0x15, /* 0..ff; reset: 0 */
87 HIF_REG_PAUSE_THRESHOLD = 0x16,
88 HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0,
89};
90
91/* Trailing status byte in Ethernet Rx frame */
92enum {
93 MCS7830_RX_SHORT_FRAME = 0x01, /* < 64 bytes */
94 MCS7830_RX_LENGTH_ERROR = 0x02, /* framelen != Ethernet length field */
95 MCS7830_RX_ALIGNMENT_ERROR = 0x04, /* non-even number of nibbles */
96 MCS7830_RX_CRC_ERROR = 0x08,
97 MCS7830_RX_LARGE_FRAME = 0x10, /* > 1518 bytes */
98 MCS7830_RX_FRAME_CORRECT = 0x20, /* frame is correct */
99 /* [7:6] reserved */
100};
101
102struct mcs7830_data {
103 u8 multi_filter[8];
104 u8 config;
105};
106
107static const char driver_name[] = "MOSCHIP usb-ethernet driver";
108
109static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
110{
111 int ret;
112
113 ret = usbnet_read_cmd(dev, MCS7830_RD_BREQ, MCS7830_RD_BMREQ,
114 value: 0x0000, index, data, size);
115 if (ret < 0)
116 return ret;
117 else if (ret < size)
118 return -ENODATA;
119
120 return ret;
121}
122
123static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data)
124{
125 return usbnet_write_cmd(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
126 value: 0x0000, index, data, size);
127}
128
129static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
130{
131 usbnet_write_cmd_async(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
132 value: 0x0000, index, data, size);
133}
134
135static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr)
136{
137 int ret = mcs7830_get_reg(dev, index: HIF_REG_ETHERNET_ADDR, ETH_ALEN, data: addr);
138 if (ret < 0)
139 return ret;
140 return 0;
141}
142
143static int mcs7830_hif_set_mac_address(struct usbnet *dev,
144 const unsigned char *addr)
145{
146 int ret = mcs7830_set_reg(dev, index: HIF_REG_ETHERNET_ADDR, ETH_ALEN, data: addr);
147
148 if (ret < 0)
149 return ret;
150 return 0;
151}
152
153static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
154{
155 int ret;
156 struct usbnet *dev = netdev_priv(dev: netdev);
157 struct sockaddr *addr = p;
158
159 if (netif_running(dev: netdev))
160 return -EBUSY;
161
162 if (!is_valid_ether_addr(addr: addr->sa_data))
163 return -EADDRNOTAVAIL;
164
165 ret = mcs7830_hif_set_mac_address(dev, addr: addr->sa_data);
166
167 if (ret < 0)
168 return ret;
169
170 /* it worked --> adopt it on netdev side */
171 eth_hw_addr_set(dev: netdev, addr: addr->sa_data);
172
173 return 0;
174}
175
176static int mcs7830_read_phy(struct usbnet *dev, u8 index)
177{
178 int ret;
179 int i;
180 __le16 val;
181
182 u8 cmd[2] = {
183 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
184 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
185 };
186
187 mutex_lock(&dev->phy_mutex);
188 /* write the MII command */
189 ret = mcs7830_set_reg(dev, index: HIF_REG_PHY_CMD1, size: 2, data: cmd);
190 if (ret < 0)
191 goto out;
192
193 /* wait for the data to become valid, should be within < 1ms */
194 for (i = 0; i < 10; i++) {
195 ret = mcs7830_get_reg(dev, index: HIF_REG_PHY_CMD1, size: 2, data: cmd);
196 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
197 break;
198 ret = -EIO;
199 msleep(msecs: 1);
200 }
201 if (ret < 0)
202 goto out;
203
204 /* read actual register contents */
205 ret = mcs7830_get_reg(dev, index: HIF_REG_PHY_DATA, size: 2, data: &val);
206 if (ret < 0)
207 goto out;
208 ret = le16_to_cpu(val);
209 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
210 index, val, i);
211out:
212 mutex_unlock(lock: &dev->phy_mutex);
213 return ret;
214}
215
216static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
217{
218 int ret;
219 int i;
220 __le16 le_val;
221
222 u8 cmd[2] = {
223 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
224 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
225 };
226
227 mutex_lock(&dev->phy_mutex);
228
229 /* write the new register contents */
230 le_val = cpu_to_le16(val);
231 ret = mcs7830_set_reg(dev, index: HIF_REG_PHY_DATA, size: 2, data: &le_val);
232 if (ret < 0)
233 goto out;
234
235 /* write the MII command */
236 ret = mcs7830_set_reg(dev, index: HIF_REG_PHY_CMD1, size: 2, data: cmd);
237 if (ret < 0)
238 goto out;
239
240 /* wait for the command to be accepted by the PHY */
241 for (i = 0; i < 10; i++) {
242 ret = mcs7830_get_reg(dev, index: HIF_REG_PHY_CMD1, size: 2, data: cmd);
243 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
244 break;
245 ret = -EIO;
246 msleep(msecs: 1);
247 }
248 if (ret < 0)
249 goto out;
250
251 ret = 0;
252 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
253 index, val, i);
254out:
255 mutex_unlock(lock: &dev->phy_mutex);
256 return ret;
257}
258
259/*
260 * This algorithm comes from the original mcs7830 version 1.4 driver,
261 * not sure if it is needed.
262 */
263static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
264{
265 int ret;
266 /* Enable all media types */
267 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
268
269 /* First reset BMCR */
270 if (!ret)
271 ret = mcs7830_write_phy(dev, MII_BMCR, val: 0x0000);
272 /* Enable Auto Neg */
273 if (!ret)
274 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
275 /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
276 if (!ret)
277 ret = mcs7830_write_phy(dev, MII_BMCR,
278 BMCR_ANENABLE | BMCR_ANRESTART );
279 return ret;
280}
281
282
283/*
284 * if we can read register 22, the chip revision is C or higher
285 */
286static int mcs7830_get_rev(struct usbnet *dev)
287{
288 u8 dummy[2];
289 int ret;
290 ret = mcs7830_get_reg(dev, index: HIF_REG_FRAME_DROP_COUNTER, size: 2, data: dummy);
291 if (ret > 0)
292 return 2; /* Rev C or later */
293 return 1; /* earlier revision */
294}
295
296/*
297 * On rev. C we need to set the pause threshold
298 */
299static void mcs7830_rev_C_fixup(struct usbnet *dev)
300{
301 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
302 int retry;
303
304 for (retry = 0; retry < 2; retry++) {
305 if (mcs7830_get_rev(dev) == 2) {
306 dev_info(&dev->udev->dev, "applying rev.C fixup\n");
307 mcs7830_set_reg(dev, index: HIF_REG_PAUSE_THRESHOLD,
308 size: 1, data: &pause_threshold);
309 }
310 msleep(msecs: 1);
311 }
312}
313
314static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
315 int location)
316{
317 struct usbnet *dev = netdev_priv(dev: netdev);
318 return mcs7830_read_phy(dev, index: location);
319}
320
321static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
322 int location, int val)
323{
324 struct usbnet *dev = netdev_priv(dev: netdev);
325 mcs7830_write_phy(dev, index: location, val);
326}
327
328static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
329{
330 struct usbnet *dev = netdev_priv(dev: net);
331 return generic_mii_ioctl(mii_if: &dev->mii, mii_data: if_mii(rq), cmd, NULL);
332}
333
334static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev)
335{
336 return (struct mcs7830_data *)&dev->data;
337}
338
339static void mcs7830_hif_update_multicast_hash(struct usbnet *dev)
340{
341 struct mcs7830_data *data = mcs7830_get_data(dev);
342 mcs7830_set_reg_async(dev, index: HIF_REG_MULTICAST_HASH,
343 size: sizeof data->multi_filter,
344 data: data->multi_filter);
345}
346
347static void mcs7830_hif_update_config(struct usbnet *dev)
348{
349 /* implementation specific to data->config
350 (argument needs to be heap-based anyway - USB DMA!) */
351 struct mcs7830_data *data = mcs7830_get_data(dev);
352 mcs7830_set_reg_async(dev, index: HIF_REG_CONFIG, size: 1, data: &data->config);
353}
354
355static void mcs7830_data_set_multicast(struct net_device *net)
356{
357 struct usbnet *dev = netdev_priv(dev: net);
358 struct mcs7830_data *data = mcs7830_get_data(dev);
359
360 memset(data->multi_filter, 0, sizeof data->multi_filter);
361
362 data->config = HIF_REG_CONFIG_TXENABLE;
363
364 /* this should not be needed, but it doesn't work otherwise */
365 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
366
367 if (net->flags & IFF_PROMISC) {
368 data->config |= HIF_REG_CONFIG_PROMISCUOUS;
369 } else if (net->flags & IFF_ALLMULTI ||
370 netdev_mc_count(net) > MCS7830_MAX_MCAST) {
371 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
372 } else if (netdev_mc_empty(net)) {
373 /* just broadcast and directed */
374 } else {
375 /* We use the 20 byte dev->data
376 * for our 8 byte filter buffer
377 * to avoid allocating memory that
378 * is tricky to free later */
379 struct netdev_hw_addr *ha;
380 u32 crc_bits;
381
382 /* Build the multicast hash filter. */
383 netdev_for_each_mc_addr(ha, net) {
384 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
385 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
386 }
387 }
388}
389
390static int mcs7830_apply_base_config(struct usbnet *dev)
391{
392 int ret;
393
394 /* re-configure known MAC (suspend case etc.) */
395 ret = mcs7830_hif_set_mac_address(dev, addr: dev->net->dev_addr);
396 if (ret) {
397 dev_info(&dev->udev->dev, "Cannot set MAC address\n");
398 goto out;
399 }
400
401 /* Set up PHY */
402 ret = mcs7830_set_autoneg(dev, ptrUserPhyMode: 0);
403 if (ret) {
404 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
405 goto out;
406 }
407
408 mcs7830_hif_update_multicast_hash(dev);
409 mcs7830_hif_update_config(dev);
410
411 mcs7830_rev_C_fixup(dev);
412 ret = 0;
413out:
414 return ret;
415}
416
417/* credits go to asix_set_multicast */
418static void mcs7830_set_multicast(struct net_device *net)
419{
420 struct usbnet *dev = netdev_priv(dev: net);
421
422 mcs7830_data_set_multicast(net);
423
424 mcs7830_hif_update_multicast_hash(dev);
425 mcs7830_hif_update_config(dev);
426}
427
428static int mcs7830_get_regs_len(struct net_device *net)
429{
430 struct usbnet *dev = netdev_priv(dev: net);
431
432 switch (mcs7830_get_rev(dev)) {
433 case 1:
434 return 21;
435 case 2:
436 return 32;
437 }
438 return 0;
439}
440
441static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
442{
443 usbnet_get_drvinfo(net, drvinfo);
444}
445
446static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
447{
448 struct usbnet *dev = netdev_priv(dev: net);
449
450 regs->version = mcs7830_get_rev(dev);
451 mcs7830_get_reg(dev, index: 0, size: regs->len, data);
452}
453
454static const struct ethtool_ops mcs7830_ethtool_ops = {
455 .get_drvinfo = mcs7830_get_drvinfo,
456 .get_regs_len = mcs7830_get_regs_len,
457 .get_regs = mcs7830_get_regs,
458
459 /* common usbnet calls */
460 .get_link = usbnet_get_link,
461 .get_msglevel = usbnet_get_msglevel,
462 .set_msglevel = usbnet_set_msglevel,
463 .nway_reset = usbnet_nway_reset,
464 .get_link_ksettings = usbnet_get_link_ksettings_mii,
465 .set_link_ksettings = usbnet_set_link_ksettings_mii,
466};
467
468static const struct net_device_ops mcs7830_netdev_ops = {
469 .ndo_open = usbnet_open,
470 .ndo_stop = usbnet_stop,
471 .ndo_start_xmit = usbnet_start_xmit,
472 .ndo_tx_timeout = usbnet_tx_timeout,
473 .ndo_change_mtu = usbnet_change_mtu,
474 .ndo_get_stats64 = dev_get_tstats64,
475 .ndo_validate_addr = eth_validate_addr,
476 .ndo_eth_ioctl = mcs7830_ioctl,
477 .ndo_set_rx_mode = mcs7830_set_multicast,
478 .ndo_set_mac_address = mcs7830_set_mac_address,
479};
480
481static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
482{
483 struct net_device *net = dev->net;
484 u8 addr[ETH_ALEN];
485 int ret;
486 int retry;
487
488 /* Initial startup: Gather MAC address setting from EEPROM */
489 ret = -EINVAL;
490 for (retry = 0; retry < 5 && ret; retry++)
491 ret = mcs7830_hif_get_mac_address(dev, addr);
492 if (ret) {
493 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
494 goto out;
495 }
496 eth_hw_addr_set(dev: net, addr);
497
498 mcs7830_data_set_multicast(net);
499
500 ret = mcs7830_apply_base_config(dev);
501 if (ret)
502 goto out;
503
504 net->ethtool_ops = &mcs7830_ethtool_ops;
505 net->netdev_ops = &mcs7830_netdev_ops;
506
507 /* reserve space for the status byte on rx */
508 dev->rx_urb_size = ETH_FRAME_LEN + 1;
509
510 dev->mii.mdio_read = mcs7830_mdio_read;
511 dev->mii.mdio_write = mcs7830_mdio_write;
512 dev->mii.dev = net;
513 dev->mii.phy_id_mask = 0x3f;
514 dev->mii.reg_num_mask = 0x1f;
515 dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
516
517 ret = usbnet_get_endpoints(dev, udev);
518out:
519 return ret;
520}
521
522/* The chip always appends a status byte that we need to strip */
523static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
524{
525 u8 status;
526
527 /* This check is no longer done by usbnet */
528 if (skb->len < dev->net->hard_header_len) {
529 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
530 return 0;
531 }
532
533 skb_trim(skb, len: skb->len - 1);
534 status = skb->data[skb->len];
535
536 if (status != MCS7830_RX_FRAME_CORRECT) {
537 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
538
539 /* hmm, perhaps usbnet.c already sees a globally visible
540 frame error and increments rx_errors on its own already? */
541 dev->net->stats.rx_errors++;
542
543 if (status & (MCS7830_RX_SHORT_FRAME
544 |MCS7830_RX_LENGTH_ERROR
545 |MCS7830_RX_LARGE_FRAME))
546 dev->net->stats.rx_length_errors++;
547 if (status & MCS7830_RX_ALIGNMENT_ERROR)
548 dev->net->stats.rx_frame_errors++;
549 if (status & MCS7830_RX_CRC_ERROR)
550 dev->net->stats.rx_crc_errors++;
551 }
552
553 return skb->len > 0;
554}
555
556static void mcs7830_status(struct usbnet *dev, struct urb *urb)
557{
558 u8 *buf = urb->transfer_buffer;
559 bool link, link_changed;
560
561 if (urb->actual_length < 16)
562 return;
563
564 link = !(buf[1] == 0x20);
565 link_changed = netif_carrier_ok(dev: dev->net) != link;
566 if (link_changed) {
567 usbnet_link_change(dev, link, 0);
568 netdev_dbg(dev->net, "Link Status is: %d\n", link);
569 }
570}
571
572static const struct driver_info moschip_info = {
573 .description = "MOSCHIP 7830/7832/7730 usb-NET adapter",
574 .bind = mcs7830_bind,
575 .rx_fixup = mcs7830_rx_fixup,
576 .flags = FLAG_ETHER | FLAG_LINK_INTR,
577 .status = mcs7830_status,
578 .in = 1,
579 .out = 2,
580};
581
582static const struct driver_info sitecom_info = {
583 .description = "Sitecom LN-30 usb-NET adapter",
584 .bind = mcs7830_bind,
585 .rx_fixup = mcs7830_rx_fixup,
586 .flags = FLAG_ETHER | FLAG_LINK_INTR,
587 .status = mcs7830_status,
588 .in = 1,
589 .out = 2,
590};
591
592static const struct usb_device_id products[] = {
593 {
594 USB_DEVICE(MCS7830_VENDOR_ID, MCS7832_PRODUCT_ID),
595 .driver_info = (unsigned long) &moschip_info,
596 },
597 {
598 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
599 .driver_info = (unsigned long) &moschip_info,
600 },
601 {
602 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
603 .driver_info = (unsigned long) &moschip_info,
604 },
605 {
606 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
607 .driver_info = (unsigned long) &sitecom_info,
608 },
609 {},
610};
611MODULE_DEVICE_TABLE(usb, products);
612
613static int mcs7830_reset_resume (struct usb_interface *intf)
614{
615 /* YES, this function is successful enough that ethtool -d
616 does show same output pre-/post-suspend */
617
618 struct usbnet *dev = usb_get_intfdata(intf);
619
620 mcs7830_apply_base_config(dev);
621
622 usbnet_resume(intf);
623
624 return 0;
625}
626
627static struct usb_driver mcs7830_driver = {
628 .name = driver_name,
629 .id_table = products,
630 .probe = usbnet_probe,
631 .disconnect = usbnet_disconnect,
632 .suspend = usbnet_suspend,
633 .resume = usbnet_resume,
634 .reset_resume = mcs7830_reset_resume,
635 .disable_hub_initiated_lpm = 1,
636};
637
638module_usb_driver(mcs7830_driver);
639
640MODULE_DESCRIPTION("USB to network adapter MCS7830)");
641MODULE_LICENSE("GPL");
642

source code of linux/drivers/net/usb/mcs7830.c