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26#include <linux/crc32.h>
27#include <linux/etherdevice.h>
28#include <linux/ethtool.h>
29#include <linux/init.h>
30#include <linux/mii.h>
31#include <linux/module.h>
32#include <linux/netdevice.h>
33#include <linux/usb.h>
34#include <linux/usb/usbnet.h>
35
36
37#define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \
38 USB_RECIP_DEVICE)
39#define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \
40 USB_RECIP_DEVICE)
41#define MCS7830_RD_BREQ 0x0E
42#define MCS7830_WR_BREQ 0x0D
43
44#define MCS7830_CTRL_TIMEOUT 1000
45#define MCS7830_MAX_MCAST 64
46
47#define MCS7830_VENDOR_ID 0x9710
48#define MCS7830_PRODUCT_ID 0x7830
49#define MCS7730_PRODUCT_ID 0x7730
50
51#define SITECOM_VENDOR_ID 0x0DF6
52#define LN_030_PRODUCT_ID 0x0021
53
54#define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
55 ADVERTISE_100HALF | ADVERTISE_10FULL | \
56 ADVERTISE_10HALF | ADVERTISE_CSMA)
57
58
59enum {
60 HIF_REG_MULTICAST_HASH = 0x00,
61 HIF_REG_PACKET_GAP1 = 0x08,
62 HIF_REG_PACKET_GAP2 = 0x09,
63 HIF_REG_PHY_DATA = 0x0a,
64 HIF_REG_PHY_CMD1 = 0x0c,
65 HIF_REG_PHY_CMD1_READ = 0x40,
66 HIF_REG_PHY_CMD1_WRITE = 0x20,
67 HIF_REG_PHY_CMD1_PHYADDR = 0x01,
68 HIF_REG_PHY_CMD2 = 0x0d,
69 HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80,
70 HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40,
71 HIF_REG_CONFIG = 0x0e,
72 HIF_REG_CONFIG_CFG = 0x80,
73 HIF_REG_CONFIG_SPEED100 = 0x40,
74 HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20,
75 HIF_REG_CONFIG_RXENABLE = 0x10,
76 HIF_REG_CONFIG_TXENABLE = 0x08,
77 HIF_REG_CONFIG_SLEEPMODE = 0x04,
78 HIF_REG_CONFIG_ALLMULTICAST = 0x02,
79 HIF_REG_CONFIG_PROMISCIOUS = 0x01,
80 HIF_REG_ETHERNET_ADDR = 0x0f,
81 HIF_REG_22 = 0x15,
82 HIF_REG_PAUSE_THRESHOLD = 0x16,
83 HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0,
84};
85
86struct mcs7830_data {
87 u8 multi_filter[8];
88 u8 config;
89};
90
91static const char driver_name[] = "MOSCHIP usb-ethernet driver";
92
93static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
94{
95 struct usb_device *xdev = dev->udev;
96 int ret;
97 void *buffer;
98
99 buffer = kmalloc(size, GFP_NOIO);
100 if (buffer == NULL)
101 return -ENOMEM;
102
103 ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ,
104 MCS7830_RD_BMREQ, 0x0000, index, buffer,
105 size, MCS7830_CTRL_TIMEOUT);
106 memcpy(data, buffer, size);
107 kfree(buffer);
108
109 return ret;
110}
111
112static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, void *data)
113{
114 struct usb_device *xdev = dev->udev;
115 int ret;
116 void *buffer;
117
118 buffer = kmalloc(size, GFP_NOIO);
119 if (buffer == NULL)
120 return -ENOMEM;
121
122 memcpy(buffer, data, size);
123
124 ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,
125 MCS7830_WR_BMREQ, 0x0000, index, buffer,
126 size, MCS7830_CTRL_TIMEOUT);
127 kfree(buffer);
128 return ret;
129}
130
131static void mcs7830_async_cmd_callback(struct urb *urb)
132{
133 struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
134 int status = urb->status;
135
136 if (status < 0)
137 printk(KERN_DEBUG "%s() failed with %d\n",
138 __func__, status);
139
140 kfree(req);
141 usb_free_urb(urb);
142}
143
144static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
145{
146 struct usb_ctrlrequest *req;
147 int ret;
148 struct urb *urb;
149
150 urb = usb_alloc_urb(0, GFP_ATOMIC);
151 if (!urb) {
152 dev_dbg(&dev->udev->dev,
153 "Error allocating URB in write_cmd_async!\n");
154 return;
155 }
156
157 req = kmalloc(sizeof *req, GFP_ATOMIC);
158 if (!req) {
159 dev_err(&dev->udev->dev,
160 "Failed to allocate memory for control request\n");
161 goto out;
162 }
163 req->bRequestType = MCS7830_WR_BMREQ;
164 req->bRequest = MCS7830_WR_BREQ;
165 req->wValue = 0;
166 req->wIndex = cpu_to_le16(index);
167 req->wLength = cpu_to_le16(size);
168
169 usb_fill_control_urb(urb, dev->udev,
170 usb_sndctrlpipe(dev->udev, 0),
171 (void *)req, data, size,
172 mcs7830_async_cmd_callback, req);
173
174 ret = usb_submit_urb(urb, GFP_ATOMIC);
175 if (ret < 0) {
176 dev_err(&dev->udev->dev,
177 "Error submitting the control message: ret=%d\n", ret);
178 goto out;
179 }
180 return;
181out:
182 kfree(req);
183 usb_free_urb(urb);
184}
185
186static int mcs7830_get_address(struct usbnet *dev)
187{
188 int ret;
189 ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
190 dev->net->dev_addr);
191 if (ret < 0)
192 return ret;
193 return 0;
194}
195
196static int mcs7830_read_phy(struct usbnet *dev, u8 index)
197{
198 int ret;
199 int i;
200 __le16 val;
201
202 u8 cmd[2] = {
203 HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
204 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
205 };
206
207 mutex_lock(&dev->phy_mutex);
208
209 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
210 if (ret < 0)
211 goto out;
212
213
214 for (i = 0; i < 10; i++) {
215 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
216 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
217 break;
218 ret = -EIO;
219 msleep(1);
220 }
221 if (ret < 0)
222 goto out;
223
224
225 ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
226 if (ret < 0)
227 goto out;
228 ret = le16_to_cpu(val);
229 dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
230 index, val, i);
231out:
232 mutex_unlock(&dev->phy_mutex);
233 return ret;
234}
235
236static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
237{
238 int ret;
239 int i;
240 __le16 le_val;
241
242 u8 cmd[2] = {
243 HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
244 HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
245 };
246
247 mutex_lock(&dev->phy_mutex);
248
249
250 le_val = cpu_to_le16(val);
251 ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
252 if (ret < 0)
253 goto out;
254
255
256 ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
257 if (ret < 0)
258 goto out;
259
260
261 for (i = 0; i < 10; i++) {
262 ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
263 if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
264 break;
265 ret = -EIO;
266 msleep(1);
267 }
268 if (ret < 0)
269 goto out;
270
271 ret = 0;
272 dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
273 index, val, i);
274out:
275 mutex_unlock(&dev->phy_mutex);
276 return ret;
277}
278
279
280
281
282
283static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
284{
285 int ret;
286
287 ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
288
289
290 if (!ret)
291 ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
292
293 if (!ret)
294 ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
295
296 if (!ret)
297 ret = mcs7830_write_phy(dev, MII_BMCR,
298 BMCR_ANENABLE | BMCR_ANRESTART );
299 return ret < 0 ? : 0;
300}
301
302
303
304
305
306static int mcs7830_get_rev(struct usbnet *dev)
307{
308 u8 dummy[2];
309 int ret;
310 ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
311 if (ret > 0)
312 return 2;
313 return 1;
314}
315
316
317
318
319static void mcs7830_rev_C_fixup(struct usbnet *dev)
320{
321 u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
322 int retry;
323
324 for (retry = 0; retry < 2; retry++) {
325 if (mcs7830_get_rev(dev) == 2) {
326 dev_info(&dev->udev->dev, "applying rev.C fixup\n");
327 mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
328 1, &pause_threshold);
329 }
330 msleep(1);
331 }
332}
333
334static int mcs7830_init_dev(struct usbnet *dev)
335{
336 int ret;
337 int retry;
338
339
340 ret = -EINVAL;
341 for (retry = 0; retry < 5 && ret; retry++)
342 ret = mcs7830_get_address(dev);
343 if (ret) {
344 dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
345 goto out;
346 }
347
348
349 ret = mcs7830_set_autoneg(dev, 0);
350 if (ret) {
351 dev_info(&dev->udev->dev, "Cannot set autoneg\n");
352 goto out;
353 }
354
355 mcs7830_rev_C_fixup(dev);
356 ret = 0;
357out:
358 return ret;
359}
360
361static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
362 int location)
363{
364 struct usbnet *dev = netdev_priv(netdev);
365 return mcs7830_read_phy(dev, location);
366}
367
368static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
369 int location, int val)
370{
371 struct usbnet *dev = netdev_priv(netdev);
372 mcs7830_write_phy(dev, location, val);
373}
374
375static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
376{
377 struct usbnet *dev = netdev_priv(net);
378 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
379}
380
381
382static void mcs7830_set_multicast(struct net_device *net)
383{
384 struct usbnet *dev = netdev_priv(net);
385 struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
386
387 data->config = HIF_REG_CONFIG_TXENABLE;
388
389
390 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
391
392 if (net->flags & IFF_PROMISC) {
393 data->config |= HIF_REG_CONFIG_PROMISCIOUS;
394 } else if (net->flags & IFF_ALLMULTI
395 || net->mc_count > MCS7830_MAX_MCAST) {
396 data->config |= HIF_REG_CONFIG_ALLMULTICAST;
397 } else if (net->mc_count == 0) {
398
399 } else {
400
401
402
403
404 struct dev_mc_list *mc_list = net->mc_list;
405 u32 crc_bits;
406 int i;
407
408 memset(data->multi_filter, 0, sizeof data->multi_filter);
409
410
411 for (i = 0; i < net->mc_count; i++) {
412 crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
413 data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
414 mc_list = mc_list->next;
415 }
416
417 mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
418 sizeof data->multi_filter,
419 data->multi_filter);
420 }
421
422 mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
423}
424
425static int mcs7830_get_regs_len(struct net_device *net)
426{
427 struct usbnet *dev = netdev_priv(net);
428
429 switch (mcs7830_get_rev(dev)) {
430 case 1:
431 return 21;
432 case 2:
433 return 32;
434 }
435 return 0;
436}
437
438static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
439{
440 usbnet_get_drvinfo(net, drvinfo);
441 drvinfo->regdump_len = mcs7830_get_regs_len(net);
442}
443
444static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
445{
446 struct usbnet *dev = netdev_priv(net);
447
448 regs->version = mcs7830_get_rev(dev);
449 mcs7830_get_reg(dev, 0, regs->len, data);
450}
451
452static const struct ethtool_ops mcs7830_ethtool_ops = {
453 .get_drvinfo = mcs7830_get_drvinfo,
454 .get_regs_len = mcs7830_get_regs_len,
455 .get_regs = mcs7830_get_regs,
456
457
458 .get_link = usbnet_get_link,
459 .get_msglevel = usbnet_get_msglevel,
460 .set_msglevel = usbnet_set_msglevel,
461 .get_settings = usbnet_get_settings,
462 .set_settings = usbnet_set_settings,
463 .nway_reset = usbnet_nway_reset,
464};
465
466static int mcs7830_set_mac_address(struct net_device *netdev, void *p)
467{
468 int ret;
469 struct usbnet *dev = netdev_priv(netdev);
470 struct sockaddr *addr = p;
471
472 if (netif_running(netdev))
473 return -EBUSY;
474
475 if (!is_valid_ether_addr(addr->sa_data))
476 return -EINVAL;
477
478 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
479
480 ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
481 netdev->dev_addr);
482
483 if (ret < 0)
484 return ret;
485
486 return 0;
487}
488
489static const struct net_device_ops mcs7830_netdev_ops = {
490 .ndo_open = usbnet_open,
491 .ndo_stop = usbnet_stop,
492 .ndo_start_xmit = usbnet_start_xmit,
493 .ndo_tx_timeout = usbnet_tx_timeout,
494 .ndo_change_mtu = usbnet_change_mtu,
495 .ndo_validate_addr = eth_validate_addr,
496 .ndo_do_ioctl = mcs7830_ioctl,
497 .ndo_set_multicast_list = mcs7830_set_multicast,
498 .ndo_set_mac_address = mcs7830_set_mac_address,
499};
500
501static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
502{
503 struct net_device *net = dev->net;
504 int ret;
505
506 ret = mcs7830_init_dev(dev);
507 if (ret)
508 goto out;
509
510 net->ethtool_ops = &mcs7830_ethtool_ops;
511 net->netdev_ops = &mcs7830_netdev_ops;
512 mcs7830_set_multicast(net);
513
514
515 dev->rx_urb_size = ETH_FRAME_LEN + 1;
516
517 dev->mii.mdio_read = mcs7830_mdio_read;
518 dev->mii.mdio_write = mcs7830_mdio_write;
519 dev->mii.dev = net;
520 dev->mii.phy_id_mask = 0x3f;
521 dev->mii.reg_num_mask = 0x1f;
522 dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
523
524 ret = usbnet_get_endpoints(dev, udev);
525out:
526 return ret;
527}
528
529
530static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
531{
532 u8 status;
533
534 if (skb->len == 0) {
535 dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
536 return 0;
537 }
538
539 skb_trim(skb, skb->len - 1);
540 status = skb->data[skb->len];
541
542 if (status != 0x20)
543 dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
544
545 return skb->len > 0;
546}
547
548static const struct driver_info moschip_info = {
549 .description = "MOSCHIP 7830/7730 usb-NET adapter",
550 .bind = mcs7830_bind,
551 .rx_fixup = mcs7830_rx_fixup,
552 .flags = FLAG_ETHER,
553 .in = 1,
554 .out = 2,
555};
556
557static const struct driver_info sitecom_info = {
558 .description = "Sitecom LN-30 usb-NET adapter",
559 .bind = mcs7830_bind,
560 .rx_fixup = mcs7830_rx_fixup,
561 .flags = FLAG_ETHER,
562 .in = 1,
563 .out = 2,
564};
565
566static const struct usb_device_id products[] = {
567 {
568 USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
569 .driver_info = (unsigned long) &moschip_info,
570 },
571 {
572 USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID),
573 .driver_info = (unsigned long) &moschip_info,
574 },
575 {
576 USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID),
577 .driver_info = (unsigned long) &sitecom_info,
578 },
579 {},
580};
581MODULE_DEVICE_TABLE(usb, products);
582
583static struct usb_driver mcs7830_driver = {
584 .name = driver_name,
585 .id_table = products,
586 .probe = usbnet_probe,
587 .disconnect = usbnet_disconnect,
588 .suspend = usbnet_suspend,
589 .resume = usbnet_resume,
590};
591
592static int __init mcs7830_init(void)
593{
594 return usb_register(&mcs7830_driver);
595}
596module_init(mcs7830_init);
597
598static void __exit mcs7830_exit(void)
599{
600 usb_deregister(&mcs7830_driver);
601}
602module_exit(mcs7830_exit);
603
604MODULE_DESCRIPTION("USB to network adapter MCS7830)");
605MODULE_LICENSE("GPL");
606
