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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 int ret;
112
113 ret = usbnet_read_cmd(dev, MCS7830_RD_BREQ, MCS7830_RD_BMREQ,
114 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 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 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, HIF_REG_ETHERNET_ADDR, ETH_ALEN, 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, HIF_REG_ETHERNET_ADDR, ETH_ALEN, 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(netdev);
157 struct sockaddr *addr = p;
158
159 if (netif_running(netdev))
160 return -EBUSY;
161
162 if (!is_valid_ether_addr(addr->sa_data))
163 return -EADDRNOTAVAIL;
164
165 ret = mcs7830_hif_set_mac_address(dev, 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(netdev, 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, HIF_REG_PHY_CMD1, 2, 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, HIF_REG_PHY_CMD1, 2, cmd);
196 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
197 break;
198 ret = -EIO;
199 msleep(1);
200 }
201 if (ret < 0)
202 goto out;
203
204 /* read actual register contents */
205 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &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(&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, HIF_REG_PHY_DATA, 2, &le_val);
232 if (ret < 0)
233 goto out;
234
235 /* write the MII command */
236 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, 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, HIF_REG_PHY_CMD1, 2, cmd);
243 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
244 break;
245 ret = -EIO;
246 msleep(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(&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, 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, HIF_REG_FRAME_DROP_COUNTER, 2, 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, HIF_REG_PAUSE_THRESHOLD,
308 1, &pause_threshold);
309 }
310 msleep(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(netdev);
318 return mcs7830_read_phy(dev, 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(netdev);
325 mcs7830_write_phy(dev, location, val);
326}
327
328static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
329{
330 struct usbnet *dev = netdev_priv(net);
331 return generic_mii_ioctl(&dev->mii, 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, HIF_REG_MULTICAST_HASH,
343 sizeof data->multi_filter,
344 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, HIF_REG_CONFIG, 1, &data->config);
353}
354
355static void mcs7830_data_set_multicast(struct net_device *net)
356{
357 struct usbnet *dev = netdev_priv(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, 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, 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(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(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(net);
449
450 regs->version = mcs7830_get_rev(dev);
451 mcs7830_get_reg(dev, 0, 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(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, 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->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");