Loading...
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, see <http://www.gnu.org/licenses/>.
40 */
41
42#include <linux/crc32.h>
43#include <linux/etherdevice.h>
44#include <linux/ethtool.h>
45#include <linux/mii.h>
46#include <linux/module.h>
47#include <linux/netdevice.h>
48#include <linux/slab.h>
49#include <linux/usb.h>
50#include <linux/usb/usbnet.h>
51
52/* requests */
53#define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \
54 USB_RECIP_DEVICE)
55#define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \
56 USB_RECIP_DEVICE)
57#define MCS7830_RD_BREQ 0x0E
58#define MCS7830_WR_BREQ 0x0D
59
60#define MCS7830_CTRL_TIMEOUT 1000
61#define MCS7830_MAX_MCAST 64
62
63#define MCS7830_VENDOR_ID 0x9710
64#define MCS7832_PRODUCT_ID 0x7832
65#define MCS7830_PRODUCT_ID 0x7830
66#define MCS7730_PRODUCT_ID 0x7730
67
68#define SITECOM_VENDOR_ID 0x0DF6
69#define LN_030_PRODUCT_ID 0x0021
70
71#define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
72 ADVERTISE_100HALF | ADVERTISE_10FULL | \
73 ADVERTISE_10HALF | ADVERTISE_CSMA)
74
75/* HIF_REG_XX corresponding index value */
76enum {
77 HIF_REG_MULTICAST_HASH = 0x00,
78 HIF_REG_PACKET_GAP1 = 0x08,
79 HIF_REG_PACKET_GAP2 = 0x09,
80 HIF_REG_PHY_DATA = 0x0a,
81 HIF_REG_PHY_CMD1 = 0x0c,
82 HIF_REG_PHY_CMD1_READ = 0x40,
83 HIF_REG_PHY_CMD1_WRITE = 0x20,
84 HIF_REG_PHY_CMD1_PHYADDR = 0x01,
85 HIF_REG_PHY_CMD2 = 0x0d,
86 HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80,
87 HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40,
88 HIF_REG_CONFIG = 0x0e,
89 /* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */
90 HIF_REG_CONFIG_CFG = 0x80,
91 HIF_REG_CONFIG_SPEED100 = 0x40,
92 HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20,
93 HIF_REG_CONFIG_RXENABLE = 0x10,
94 HIF_REG_CONFIG_TXENABLE = 0x08,
95 HIF_REG_CONFIG_SLEEPMODE = 0x04,
96 HIF_REG_CONFIG_ALLMULTICAST = 0x02,
97 HIF_REG_CONFIG_PROMISCUOUS = 0x01,
98 HIF_REG_ETHERNET_ADDR = 0x0f,
99 HIF_REG_FRAME_DROP_COUNTER = 0x15, /* 0..ff; reset: 0 */
100 HIF_REG_PAUSE_THRESHOLD = 0x16,
101 HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0,
102};
103
104/* Trailing status byte in Ethernet Rx frame */
105enum {
106 MCS7830_RX_SHORT_FRAME = 0x01, /* < 64 bytes */
107 MCS7830_RX_LENGTH_ERROR = 0x02, /* framelen != Ethernet length field */
108 MCS7830_RX_ALIGNMENT_ERROR = 0x04, /* non-even number of nibbles */
109 MCS7830_RX_CRC_ERROR = 0x08,
110 MCS7830_RX_LARGE_FRAME = 0x10, /* > 1518 bytes */
111 MCS7830_RX_FRAME_CORRECT = 0x20, /* frame is correct */
112 /* [7:6] reserved */
113};
114
115struct mcs7830_data {
116 u8 multi_filter[8];
117 u8 config;
118};
119
120static const char driver_name[] = "MOSCHIP usb-ethernet driver";
121
122static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
123{
124 return usbnet_read_cmd(dev, MCS7830_RD_BREQ, MCS7830_RD_BMREQ,
125 0x0000, index, data, size);
126}
127
128static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data)
129{
130 return usbnet_write_cmd(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
131 0x0000, index, data, size);
132}
133
134static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
135{
136 usbnet_write_cmd_async(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
137 0x0000, index, data, size);
138}
139
140static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr)
141{
142 int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
143 if (ret < 0)
144 return ret;
145 return 0;
146}
147
148static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr)
149{
150 int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
151
152 if (ret < 0)
153 return ret;
154 return 0;
155}
156
157static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
158{
159 int ret;
160 struct usbnet *dev = netdev_priv(netdev);
161 struct sockaddr *addr = p;
162
163 if (netif_running(netdev))
164 return -EBUSY;
165
166 if (!is_valid_ether_addr(addr->sa_data))
167 return -EADDRNOTAVAIL;
168
169 ret = mcs7830_hif_set_mac_address(dev, addr->sa_data);
170
171 if (ret < 0)
172 return ret;
173
174 /* it worked --> adopt it on netdev side */
175 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
176
177 return 0;
178}
179
180static int mcs7830_read_phy(struct usbnet *dev, u8 index)
181{
182 int ret;
183 int i;
184 __le16 val;
185
186 u8 cmd[2] = {
187 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
188 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
189 };
190
191 mutex_lock(&dev->phy_mutex);
192 /* write the MII command */
193 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
194 if (ret < 0)
195 goto out;
196
197 /* wait for the data to become valid, should be within < 1ms */
198 for (i = 0; i < 10; i++) {
199 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
200 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
201 break;
202 ret = -EIO;
203 msleep(1);
204 }
205 if (ret < 0)
206 goto out;
207
208 /* read actual register contents */
209 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
210 if (ret < 0)
211 goto out;
212 ret = le16_to_cpu(val);
213 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
214 index, val, i);
215out:
216 mutex_unlock(&dev->phy_mutex);
217 return ret;
218}
219
220static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
221{
222 int ret;
223 int i;
224 __le16 le_val;
225
226 u8 cmd[2] = {
227 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
228 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
229 };
230
231 mutex_lock(&dev->phy_mutex);
232
233 /* write the new register contents */
234 le_val = cpu_to_le16(val);
235 ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
236 if (ret < 0)
237 goto out;
238
239 /* write the MII command */
240 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
241 if (ret < 0)
242 goto out;
243
244 /* wait for the command to be accepted by the PHY */
245 for (i = 0; i < 10; i++) {
246 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
247 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
248 break;
249 ret = -EIO;
250 msleep(1);
251 }
252 if (ret < 0)
253 goto out;
254
255 ret = 0;
256 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
257 index, val, i);
258out:
259 mutex_unlock(&dev->phy_mutex);
260 return ret;
261}
262
263/*
264 * This algorithm comes from the original mcs7830 version 1.4 driver,
265 * not sure if it is needed.
266 */
267static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
268{
269 int ret;
270 /* Enable all media types */
271 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
272
273 /* First reset BMCR */
274 if (!ret)
275 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
276 /* Enable Auto Neg */
277 if (!ret)
278 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
279 /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
280 if (!ret)
281 ret = mcs7830_write_phy(dev, MII_BMCR,
282 BMCR_ANENABLE | BMCR_ANRESTART );
283 return ret;
284}
285
286
287/*
288 * if we can read register 22, the chip revision is C or higher
289 */
290static int mcs7830_get_rev(struct usbnet *dev)
291{
292 u8 dummy[2];
293 int ret;
294 ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy);
295 if (ret > 0)
296 return 2; /* Rev C or later */
297 return 1; /* earlier revision */
298}
299
300/*
301 * On rev. C we need to set the pause threshold
302 */
303static void mcs7830_rev_C_fixup(struct usbnet *dev)
304{
305 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
306 int retry;
307
308 for (retry = 0; retry < 2; retry++) {
309 if (mcs7830_get_rev(dev) == 2) {
310 dev_info(&dev->udev->dev, "applying rev.C fixup\n");
311 mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
312 1, &pause_threshold);
313 }
314 msleep(1);
315 }
316}
317
318static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
319 int location)
320{
321 struct usbnet *dev = netdev_priv(netdev);
322 return mcs7830_read_phy(dev, location);
323}
324
325static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
326 int location, int val)
327{
328 struct usbnet *dev = netdev_priv(netdev);
329 mcs7830_write_phy(dev, location, val);
330}
331
332static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
333{
334 struct usbnet *dev = netdev_priv(net);
335 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
336}
337
338static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev)
339{
340 return (struct mcs7830_data *)&dev->data;
341}
342
343static void mcs7830_hif_update_multicast_hash(struct usbnet *dev)
344{
345 struct mcs7830_data *data = mcs7830_get_data(dev);
346 mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
347 sizeof data->multi_filter,
348 data->multi_filter);
349}
350
351static void mcs7830_hif_update_config(struct usbnet *dev)
352{
353 /* implementation specific to data->config
354 (argument needs to be heap-based anyway - USB DMA!) */
355 struct mcs7830_data *data = mcs7830_get_data(dev);
356 mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
357}
358
359static void mcs7830_data_set_multicast(struct net_device *net)
360{
361 struct usbnet *dev = netdev_priv(net);
362 struct mcs7830_data *data = mcs7830_get_data(dev);
363
364 memset(data->multi_filter, 0, sizeof data->multi_filter);
365
366 data->config = HIF_REG_CONFIG_TXENABLE;
367
368 /* this should not be needed, but it doesn't work otherwise */
369 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
370
371 if (net->flags & IFF_PROMISC) {
372 data->config |= HIF_REG_CONFIG_PROMISCUOUS;
373 } else if (net->flags & IFF_ALLMULTI ||
374 netdev_mc_count(net) > MCS7830_MAX_MCAST) {
375 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
376 } else if (netdev_mc_empty(net)) {
377 /* just broadcast and directed */
378 } else {
379 /* We use the 20 byte dev->data
380 * for our 8 byte filter buffer
381 * to avoid allocating memory that
382 * is tricky to free later */
383 struct netdev_hw_addr *ha;
384 u32 crc_bits;
385
386 /* Build the multicast hash filter. */
387 netdev_for_each_mc_addr(ha, net) {
388 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
389 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
390 }
391 }
392}
393
394static int mcs7830_apply_base_config(struct usbnet *dev)
395{
396 int ret;
397
398 /* re-configure known MAC (suspend case etc.) */
399 ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr);
400 if (ret) {
401 dev_info(&dev->udev->dev, "Cannot set MAC address\n");
402 goto out;
403 }
404
405 /* Set up PHY */
406 ret = mcs7830_set_autoneg(dev, 0);
407 if (ret) {
408 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
409 goto out;
410 }
411
412 mcs7830_hif_update_multicast_hash(dev);
413 mcs7830_hif_update_config(dev);
414
415 mcs7830_rev_C_fixup(dev);
416 ret = 0;
417out:
418 return ret;
419}
420
421/* credits go to asix_set_multicast */
422static void mcs7830_set_multicast(struct net_device *net)
423{
424 struct usbnet *dev = netdev_priv(net);
425
426 mcs7830_data_set_multicast(net);
427
428 mcs7830_hif_update_multicast_hash(dev);
429 mcs7830_hif_update_config(dev);
430}
431
432static int mcs7830_get_regs_len(struct net_device *net)
433{
434 struct usbnet *dev = netdev_priv(net);
435
436 switch (mcs7830_get_rev(dev)) {
437 case 1:
438 return 21;
439 case 2:
440 return 32;
441 }
442 return 0;
443}
444
445static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
446{
447 usbnet_get_drvinfo(net, drvinfo);
448 drvinfo->regdump_len = mcs7830_get_regs_len(net);
449}
450
451static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
452{
453 struct usbnet *dev = netdev_priv(net);
454
455 regs->version = mcs7830_get_rev(dev);
456 mcs7830_get_reg(dev, 0, regs->len, data);
457}
458
459static const struct ethtool_ops mcs7830_ethtool_ops = {
460 .get_drvinfo = mcs7830_get_drvinfo,
461 .get_regs_len = mcs7830_get_regs_len,
462 .get_regs = mcs7830_get_regs,
463
464 /* common usbnet calls */
465 .get_link = usbnet_get_link,
466 .get_msglevel = usbnet_get_msglevel,
467 .set_msglevel = usbnet_set_msglevel,
468 .get_settings = usbnet_get_settings,
469 .set_settings = usbnet_set_settings,
470 .nway_reset = usbnet_nway_reset,
471};
472
473static const struct net_device_ops mcs7830_netdev_ops = {
474 .ndo_open = usbnet_open,
475 .ndo_stop = usbnet_stop,
476 .ndo_start_xmit = usbnet_start_xmit,
477 .ndo_tx_timeout = usbnet_tx_timeout,
478 .ndo_change_mtu = usbnet_change_mtu,
479 .ndo_validate_addr = eth_validate_addr,
480 .ndo_do_ioctl = mcs7830_ioctl,
481 .ndo_set_rx_mode = mcs7830_set_multicast,
482 .ndo_set_mac_address = mcs7830_set_mac_address,
483};
484
485static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
486{
487 struct net_device *net = dev->net;
488 int ret;
489 int retry;
490
491 /* Initial startup: Gather MAC address setting from EEPROM */
492 ret = -EINVAL;
493 for (retry = 0; retry < 5 && ret; retry++)
494 ret = mcs7830_hif_get_mac_address(dev, net->dev_addr);
495 if (ret) {
496 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
497 goto out;
498 }
499
500 mcs7830_data_set_multicast(net);
501
502 ret = mcs7830_apply_base_config(dev);
503 if (ret)
504 goto out;
505
506 net->ethtool_ops = &mcs7830_ethtool_ops;
507 net->netdev_ops = &mcs7830_netdev_ops;
508
509 /* reserve space for the status byte on rx */
510 dev->rx_urb_size = ETH_FRAME_LEN + 1;
511
512 dev->mii.mdio_read = mcs7830_mdio_read;
513 dev->mii.mdio_write = mcs7830_mdio_write;
514 dev->mii.dev = net;
515 dev->mii.phy_id_mask = 0x3f;
516 dev->mii.reg_num_mask = 0x1f;
517 dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
518
519 ret = usbnet_get_endpoints(dev, udev);
520out:
521 return ret;
522}
523
524/* The chip always appends a status byte that we need to strip */
525static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
526{
527 u8 status;
528
529 /* This check is no longer done by usbnet */
530 if (skb->len < dev->net->hard_header_len) {
531 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
532 return 0;
533 }
534
535 skb_trim(skb, skb->len - 1);
536 status = skb->data[skb->len];
537
538 if (status != MCS7830_RX_FRAME_CORRECT) {
539 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
540
541 /* hmm, perhaps usbnet.c already sees a globally visible
542 frame error and increments rx_errors on its own already? */
543 dev->net->stats.rx_errors++;
544
545 if (status & (MCS7830_RX_SHORT_FRAME
546 |MCS7830_RX_LENGTH_ERROR
547 |MCS7830_RX_LARGE_FRAME))
548 dev->net->stats.rx_length_errors++;
549 if (status & MCS7830_RX_ALIGNMENT_ERROR)
550 dev->net->stats.rx_frame_errors++;
551 if (status & MCS7830_RX_CRC_ERROR)
552 dev->net->stats.rx_crc_errors++;
553 }
554
555 return skb->len > 0;
556}
557
558static void mcs7830_status(struct usbnet *dev, struct urb *urb)
559{
560 u8 *buf = urb->transfer_buffer;
561 bool link, link_changed;
562
563 if (urb->actual_length < 16)
564 return;
565
566 link = !(buf[1] == 0x20);
567 link_changed = netif_carrier_ok(dev->net) != link;
568 if (link_changed) {
569 usbnet_link_change(dev, link, 0);
570 netdev_dbg(dev->net, "Link Status is: %d\n", link);
571 }
572}
573
574static const struct driver_info moschip_info = {
575 .description = "MOSCHIP 7830/7832/7730 usb-NET adapter",
576 .bind = mcs7830_bind,
577 .rx_fixup = mcs7830_rx_fixup,
578 .flags = FLAG_ETHER | FLAG_LINK_INTR,
579 .status = mcs7830_status,
580 .in = 1,
581 .out = 2,
582};
583
584static const struct driver_info sitecom_info = {
585 .description = "Sitecom LN-30 usb-NET adapter",
586 .bind = mcs7830_bind,
587 .rx_fixup = mcs7830_rx_fixup,
588 .flags = FLAG_ETHER | FLAG_LINK_INTR,
589 .status = mcs7830_status,
590 .in = 1,
591 .out = 2,
592};
593
594static const struct usb_device_id products[] = {
595 {
596 USB_DEVICE(MCS7830_VENDOR_ID, MCS7832_PRODUCT_ID),
597 .driver_info = (unsigned long) &moschip_info,
598 },
599 {
600 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
601 .driver_info = (unsigned long) &moschip_info,
602 },
603 {
604 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
605 .driver_info = (unsigned long) &moschip_info,
606 },
607 {
608 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
609 .driver_info = (unsigned long) &sitecom_info,
610 },
611 {},
612};
613MODULE_DEVICE_TABLE(usb, products);
614
615static int mcs7830_reset_resume (struct usb_interface *intf)
616{
617 /* YES, this function is successful enough that ethtool -d
618 does show same output pre-/post-suspend */
619
620 struct usbnet *dev = usb_get_intfdata(intf);
621
622 mcs7830_apply_base_config(dev);
623
624 usbnet_resume(intf);
625
626 return 0;
627}
628
629static struct usb_driver mcs7830_driver = {
630 .name = driver_name,
631 .id_table = products,
632 .probe = usbnet_probe,
633 .disconnect = usbnet_disconnect,
634 .suspend = usbnet_suspend,
635 .resume = usbnet_resume,
636 .reset_resume = mcs7830_reset_resume,
637 .disable_hub_initiated_lpm = 1,
638};
639
640module_usb_driver(mcs7830_driver);
641
642MODULE_DESCRIPTION("USB to network adapter MCS7830)");
643MODULE_LICENSE("GPL");
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 return usbnet_read_cmd(dev, MCS7830_RD_BREQ, MCS7830_RD_BMREQ,
112 0x0000, index, data, size);
113}
114
115static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data)
116{
117 return usbnet_write_cmd(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
118 0x0000, index, data, size);
119}
120
121static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
122{
123 usbnet_write_cmd_async(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ,
124 0x0000, index, data, size);
125}
126
127static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr)
128{
129 int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
130 if (ret < 0)
131 return ret;
132 return 0;
133}
134
135static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr)
136{
137 int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr);
138
139 if (ret < 0)
140 return ret;
141 return 0;
142}
143
144static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
145{
146 int ret;
147 struct usbnet *dev = netdev_priv(netdev);
148 struct sockaddr *addr = p;
149
150 if (netif_running(netdev))
151 return -EBUSY;
152
153 if (!is_valid_ether_addr(addr->sa_data))
154 return -EADDRNOTAVAIL;
155
156 ret = mcs7830_hif_set_mac_address(dev, addr->sa_data);
157
158 if (ret < 0)
159 return ret;
160
161 /* it worked --> adopt it on netdev side */
162 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
163
164 return 0;
165}
166
167static int mcs7830_read_phy(struct usbnet *dev, u8 index)
168{
169 int ret;
170 int i;
171 __le16 val;
172
173 u8 cmd[2] = {
174 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
175 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
176 };
177
178 mutex_lock(&dev->phy_mutex);
179 /* write the MII command */
180 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
181 if (ret < 0)
182 goto out;
183
184 /* wait for the data to become valid, should be within < 1ms */
185 for (i = 0; i < 10; i++) {
186 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
187 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
188 break;
189 ret = -EIO;
190 msleep(1);
191 }
192 if (ret < 0)
193 goto out;
194
195 /* read actual register contents */
196 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
197 if (ret < 0)
198 goto out;
199 ret = le16_to_cpu(val);
200 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
201 index, val, i);
202out:
203 mutex_unlock(&dev->phy_mutex);
204 return ret;
205}
206
207static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
208{
209 int ret;
210 int i;
211 __le16 le_val;
212
213 u8 cmd[2] = {
214 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
215 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
216 };
217
218 mutex_lock(&dev->phy_mutex);
219
220 /* write the new register contents */
221 le_val = cpu_to_le16(val);
222 ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
223 if (ret < 0)
224 goto out;
225
226 /* write the MII command */
227 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
228 if (ret < 0)
229 goto out;
230
231 /* wait for the command to be accepted by the PHY */
232 for (i = 0; i < 10; i++) {
233 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
234 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
235 break;
236 ret = -EIO;
237 msleep(1);
238 }
239 if (ret < 0)
240 goto out;
241
242 ret = 0;
243 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
244 index, val, i);
245out:
246 mutex_unlock(&dev->phy_mutex);
247 return ret;
248}
249
250/*
251 * This algorithm comes from the original mcs7830 version 1.4 driver,
252 * not sure if it is needed.
253 */
254static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
255{
256 int ret;
257 /* Enable all media types */
258 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
259
260 /* First reset BMCR */
261 if (!ret)
262 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
263 /* Enable Auto Neg */
264 if (!ret)
265 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
266 /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
267 if (!ret)
268 ret = mcs7830_write_phy(dev, MII_BMCR,
269 BMCR_ANENABLE | BMCR_ANRESTART );
270 return ret;
271}
272
273
274/*
275 * if we can read register 22, the chip revision is C or higher
276 */
277static int mcs7830_get_rev(struct usbnet *dev)
278{
279 u8 dummy[2];
280 int ret;
281 ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy);
282 if (ret > 0)
283 return 2; /* Rev C or later */
284 return 1; /* earlier revision */
285}
286
287/*
288 * On rev. C we need to set the pause threshold
289 */
290static void mcs7830_rev_C_fixup(struct usbnet *dev)
291{
292 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
293 int retry;
294
295 for (retry = 0; retry < 2; retry++) {
296 if (mcs7830_get_rev(dev) == 2) {
297 dev_info(&dev->udev->dev, "applying rev.C fixup\n");
298 mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
299 1, &pause_threshold);
300 }
301 msleep(1);
302 }
303}
304
305static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
306 int location)
307{
308 struct usbnet *dev = netdev_priv(netdev);
309 return mcs7830_read_phy(dev, location);
310}
311
312static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
313 int location, int val)
314{
315 struct usbnet *dev = netdev_priv(netdev);
316 mcs7830_write_phy(dev, location, val);
317}
318
319static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
320{
321 struct usbnet *dev = netdev_priv(net);
322 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
323}
324
325static inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev)
326{
327 return (struct mcs7830_data *)&dev->data;
328}
329
330static void mcs7830_hif_update_multicast_hash(struct usbnet *dev)
331{
332 struct mcs7830_data *data = mcs7830_get_data(dev);
333 mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
334 sizeof data->multi_filter,
335 data->multi_filter);
336}
337
338static void mcs7830_hif_update_config(struct usbnet *dev)
339{
340 /* implementation specific to data->config
341 (argument needs to be heap-based anyway - USB DMA!) */
342 struct mcs7830_data *data = mcs7830_get_data(dev);
343 mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
344}
345
346static void mcs7830_data_set_multicast(struct net_device *net)
347{
348 struct usbnet *dev = netdev_priv(net);
349 struct mcs7830_data *data = mcs7830_get_data(dev);
350
351 memset(data->multi_filter, 0, sizeof data->multi_filter);
352
353 data->config = HIF_REG_CONFIG_TXENABLE;
354
355 /* this should not be needed, but it doesn't work otherwise */
356 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
357
358 if (net->flags & IFF_PROMISC) {
359 data->config |= HIF_REG_CONFIG_PROMISCUOUS;
360 } else if (net->flags & IFF_ALLMULTI ||
361 netdev_mc_count(net) > MCS7830_MAX_MCAST) {
362 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
363 } else if (netdev_mc_empty(net)) {
364 /* just broadcast and directed */
365 } else {
366 /* We use the 20 byte dev->data
367 * for our 8 byte filter buffer
368 * to avoid allocating memory that
369 * is tricky to free later */
370 struct netdev_hw_addr *ha;
371 u32 crc_bits;
372
373 /* Build the multicast hash filter. */
374 netdev_for_each_mc_addr(ha, net) {
375 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
376 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
377 }
378 }
379}
380
381static int mcs7830_apply_base_config(struct usbnet *dev)
382{
383 int ret;
384
385 /* re-configure known MAC (suspend case etc.) */
386 ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr);
387 if (ret) {
388 dev_info(&dev->udev->dev, "Cannot set MAC address\n");
389 goto out;
390 }
391
392 /* Set up PHY */
393 ret = mcs7830_set_autoneg(dev, 0);
394 if (ret) {
395 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
396 goto out;
397 }
398
399 mcs7830_hif_update_multicast_hash(dev);
400 mcs7830_hif_update_config(dev);
401
402 mcs7830_rev_C_fixup(dev);
403 ret = 0;
404out:
405 return ret;
406}
407
408/* credits go to asix_set_multicast */
409static void mcs7830_set_multicast(struct net_device *net)
410{
411 struct usbnet *dev = netdev_priv(net);
412
413 mcs7830_data_set_multicast(net);
414
415 mcs7830_hif_update_multicast_hash(dev);
416 mcs7830_hif_update_config(dev);
417}
418
419static int mcs7830_get_regs_len(struct net_device *net)
420{
421 struct usbnet *dev = netdev_priv(net);
422
423 switch (mcs7830_get_rev(dev)) {
424 case 1:
425 return 21;
426 case 2:
427 return 32;
428 }
429 return 0;
430}
431
432static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
433{
434 usbnet_get_drvinfo(net, drvinfo);
435}
436
437static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
438{
439 struct usbnet *dev = netdev_priv(net);
440
441 regs->version = mcs7830_get_rev(dev);
442 mcs7830_get_reg(dev, 0, regs->len, data);
443}
444
445static const struct ethtool_ops mcs7830_ethtool_ops = {
446 .get_drvinfo = mcs7830_get_drvinfo,
447 .get_regs_len = mcs7830_get_regs_len,
448 .get_regs = mcs7830_get_regs,
449
450 /* common usbnet calls */
451 .get_link = usbnet_get_link,
452 .get_msglevel = usbnet_get_msglevel,
453 .set_msglevel = usbnet_set_msglevel,
454 .nway_reset = usbnet_nway_reset,
455 .get_link_ksettings = usbnet_get_link_ksettings,
456 .set_link_ksettings = usbnet_set_link_ksettings,
457};
458
459static const struct net_device_ops mcs7830_netdev_ops = {
460 .ndo_open = usbnet_open,
461 .ndo_stop = usbnet_stop,
462 .ndo_start_xmit = usbnet_start_xmit,
463 .ndo_tx_timeout = usbnet_tx_timeout,
464 .ndo_change_mtu = usbnet_change_mtu,
465 .ndo_get_stats64 = usbnet_get_stats64,
466 .ndo_validate_addr = eth_validate_addr,
467 .ndo_do_ioctl = mcs7830_ioctl,
468 .ndo_set_rx_mode = mcs7830_set_multicast,
469 .ndo_set_mac_address = mcs7830_set_mac_address,
470};
471
472static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
473{
474 struct net_device *net = dev->net;
475 int ret;
476 int retry;
477
478 /* Initial startup: Gather MAC address setting from EEPROM */
479 ret = -EINVAL;
480 for (retry = 0; retry < 5 && ret; retry++)
481 ret = mcs7830_hif_get_mac_address(dev, net->dev_addr);
482 if (ret) {
483 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
484 goto out;
485 }
486
487 mcs7830_data_set_multicast(net);
488
489 ret = mcs7830_apply_base_config(dev);
490 if (ret)
491 goto out;
492
493 net->ethtool_ops = &mcs7830_ethtool_ops;
494 net->netdev_ops = &mcs7830_netdev_ops;
495
496 /* reserve space for the status byte on rx */
497 dev->rx_urb_size = ETH_FRAME_LEN + 1;
498
499 dev->mii.mdio_read = mcs7830_mdio_read;
500 dev->mii.mdio_write = mcs7830_mdio_write;
501 dev->mii.dev = net;
502 dev->mii.phy_id_mask = 0x3f;
503 dev->mii.reg_num_mask = 0x1f;
504 dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
505
506 ret = usbnet_get_endpoints(dev, udev);
507out:
508 return ret;
509}
510
511/* The chip always appends a status byte that we need to strip */
512static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
513{
514 u8 status;
515
516 /* This check is no longer done by usbnet */
517 if (skb->len < dev->net->hard_header_len) {
518 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
519 return 0;
520 }
521
522 skb_trim(skb, skb->len - 1);
523 status = skb->data[skb->len];
524
525 if (status != MCS7830_RX_FRAME_CORRECT) {
526 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
527
528 /* hmm, perhaps usbnet.c already sees a globally visible
529 frame error and increments rx_errors on its own already? */
530 dev->net->stats.rx_errors++;
531
532 if (status & (MCS7830_RX_SHORT_FRAME
533 |MCS7830_RX_LENGTH_ERROR
534 |MCS7830_RX_LARGE_FRAME))
535 dev->net->stats.rx_length_errors++;
536 if (status & MCS7830_RX_ALIGNMENT_ERROR)
537 dev->net->stats.rx_frame_errors++;
538 if (status & MCS7830_RX_CRC_ERROR)
539 dev->net->stats.rx_crc_errors++;
540 }
541
542 return skb->len > 0;
543}
544
545static void mcs7830_status(struct usbnet *dev, struct urb *urb)
546{
547 u8 *buf = urb->transfer_buffer;
548 bool link, link_changed;
549
550 if (urb->actual_length < 16)
551 return;
552
553 link = !(buf[1] == 0x20);
554 link_changed = netif_carrier_ok(dev->net) != link;
555 if (link_changed) {
556 usbnet_link_change(dev, link, 0);
557 netdev_dbg(dev->net, "Link Status is: %d\n", link);
558 }
559}
560
561static const struct driver_info moschip_info = {
562 .description = "MOSCHIP 7830/7832/7730 usb-NET adapter",
563 .bind = mcs7830_bind,
564 .rx_fixup = mcs7830_rx_fixup,
565 .flags = FLAG_ETHER | FLAG_LINK_INTR,
566 .status = mcs7830_status,
567 .in = 1,
568 .out = 2,
569};
570
571static const struct driver_info sitecom_info = {
572 .description = "Sitecom LN-30 usb-NET adapter",
573 .bind = mcs7830_bind,
574 .rx_fixup = mcs7830_rx_fixup,
575 .flags = FLAG_ETHER | FLAG_LINK_INTR,
576 .status = mcs7830_status,
577 .in = 1,
578 .out = 2,
579};
580
581static const struct usb_device_id products[] = {
582 {
583 USB_DEVICE(MCS7830_VENDOR_ID, MCS7832_PRODUCT_ID),
584 .driver_info = (unsigned long) &moschip_info,
585 },
586 {
587 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
588 .driver_info = (unsigned long) &moschip_info,
589 },
590 {
591 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
592 .driver_info = (unsigned long) &moschip_info,
593 },
594 {
595 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
596 .driver_info = (unsigned long) &sitecom_info,
597 },
598 {},
599};
600MODULE_DEVICE_TABLE(usb, products);
601
602static int mcs7830_reset_resume (struct usb_interface *intf)
603{
604 /* YES, this function is successful enough that ethtool -d
605 does show same output pre-/post-suspend */
606
607 struct usbnet *dev = usb_get_intfdata(intf);
608
609 mcs7830_apply_base_config(dev);
610
611 usbnet_resume(intf);
612
613 return 0;
614}
615
616static struct usb_driver mcs7830_driver = {
617 .name = driver_name,
618 .id_table = products,
619 .probe = usbnet_probe,
620 .disconnect = usbnet_disconnect,
621 .suspend = usbnet_suspend,
622 .resume = usbnet_resume,
623 .reset_resume = mcs7830_reset_resume,
624 .disable_hub_initiated_lpm = 1,
625};
626
627module_usb_driver(mcs7830_driver);
628
629MODULE_DESCRIPTION("USB to network adapter MCS7830)");
630MODULE_LICENSE("GPL");