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13#include <linux/module.h>
14#include <linux/sched.h>
15#include <linux/stddef.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
18#include <linux/ethtool.h>
19#include <linux/mii.h>
20#include <linux/usb.h>
21#include <linux/crc32.h>
22#include <linux/usb/usbnet.h>
23#include <linux/slab.h>
24
25
26
27
28
29
30#define DM_READ_REGS 0x00
31#define DM_WRITE_REGS 0x01
32#define DM_READ_MEMS 0x02
33#define DM_WRITE_REG 0x03
34#define DM_WRITE_MEMS 0x05
35#define DM_WRITE_MEM 0x07
36
37
38#define DM_NET_CTRL 0x00
39#define DM_RX_CTRL 0x05
40#define DM_SHARED_CTRL 0x0b
41#define DM_SHARED_ADDR 0x0c
42#define DM_SHARED_DATA 0x0d
43#define DM_PHY_ADDR 0x10
44#define DM_MCAST_ADDR 0x16
45#define DM_GPR_CTRL 0x1e
46#define DM_GPR_DATA 0x1f
47#define DM_CHIP_ID 0x2c
48#define DM_MODE_CTRL 0x91
49
50
51#define ID_DM9601 0
52#define ID_DM9620 1
53
54#define DM_MAX_MCAST 64
55#define DM_MCAST_SIZE 8
56#define DM_EEPROM_LEN 256
57#define DM_TX_OVERHEAD 2
58#define DM_RX_OVERHEAD 7
59#define DM_TIMEOUT 1000
60
61static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
62{
63 int err;
64 err = usbnet_read_cmd(dev, DM_READ_REGS,
65 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
66 0, reg, data, length);
67 if(err != length && err >= 0)
68 err = -EINVAL;
69 return err;
70}
71
72static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
73{
74 return dm_read(dev, reg, 1, value);
75}
76
77static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data)
78{
79 int err;
80 err = usbnet_write_cmd(dev, DM_WRITE_REGS,
81 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
82 0, reg, data, length);
83
84 if (err >= 0 && err < length)
85 err = -EINVAL;
86 return err;
87}
88
89static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value)
90{
91 return usbnet_write_cmd(dev, DM_WRITE_REG,
92 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
93 value, reg, NULL, 0);
94}
95
96static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data)
97{
98 usbnet_write_cmd_async(dev, DM_WRITE_REGS,
99 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
100 0, reg, data, length);
101}
102
103static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
104{
105 usbnet_write_cmd_async(dev, DM_WRITE_REG,
106 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
107 value, reg, NULL, 0);
108}
109
110static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value)
111{
112 int ret, i;
113
114 mutex_lock(&dev->phy_mutex);
115
116 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
117 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);
118
119 for (i = 0; i < DM_TIMEOUT; i++) {
120 u8 tmp = 0;
121
122 udelay(1);
123 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
124 if (ret < 0)
125 goto out;
126
127
128 if ((tmp & 1) == 0)
129 break;
130 }
131
132 if (i == DM_TIMEOUT) {
133 netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom");
134 ret = -EIO;
135 goto out;
136 }
137
138 dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
139 ret = dm_read(dev, DM_SHARED_DATA, 2, value);
140
141 netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n",
142 phy, reg, *value, ret);
143
144 out:
145 mutex_unlock(&dev->phy_mutex);
146 return ret;
147}
148
149static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
150{
151 int ret, i;
152
153 mutex_lock(&dev->phy_mutex);
154
155 ret = dm_write(dev, DM_SHARED_DATA, 2, &value);
156 if (ret < 0)
157 goto out;
158
159 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
160 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);
161
162 for (i = 0; i < DM_TIMEOUT; i++) {
163 u8 tmp = 0;
164
165 udelay(1);
166 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
167 if (ret < 0)
168 goto out;
169
170
171 if ((tmp & 1) == 0)
172 break;
173 }
174
175 if (i == DM_TIMEOUT) {
176 netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom");
177 ret = -EIO;
178 goto out;
179 }
180
181 dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
182
183out:
184 mutex_unlock(&dev->phy_mutex);
185 return ret;
186}
187
188static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
189{
190 return dm_read_shared_word(dev, 0, offset, value);
191}
192
193
194
195static int dm9601_get_eeprom_len(struct net_device *dev)
196{
197 return DM_EEPROM_LEN;
198}
199
200static int dm9601_get_eeprom(struct net_device *net,
201 struct ethtool_eeprom *eeprom, u8 * data)
202{
203 struct usbnet *dev = netdev_priv(net);
204 __le16 *ebuf = (__le16 *) data;
205 int i;
206
207
208 if ((eeprom->offset % 2) || (eeprom->len % 2))
209 return -EINVAL;
210
211 for (i = 0; i < eeprom->len / 2; i++) {
212 if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i,
213 &ebuf[i]) < 0)
214 return -EINVAL;
215 }
216 return 0;
217}
218
219static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc)
220{
221 struct usbnet *dev = netdev_priv(netdev);
222
223 __le16 res;
224
225 if (phy_id) {
226 netdev_dbg(dev->net, "Only internal phy supported\n");
227 return 0;
228 }
229
230 dm_read_shared_word(dev, 1, loc, &res);
231
232 netdev_dbg(dev->net,
233 "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
234 phy_id, loc, le16_to_cpu(res));
235
236 return le16_to_cpu(res);
237}
238
239static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
240 int val)
241{
242 struct usbnet *dev = netdev_priv(netdev);
243 __le16 res = cpu_to_le16(val);
244
245 if (phy_id) {
246 netdev_dbg(dev->net, "Only internal phy supported\n");
247 return;
248 }
249
250 netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
251 phy_id, loc, val);
252
253 dm_write_shared_word(dev, 1, loc, res);
254}
255
256static void dm9601_get_drvinfo(struct net_device *net,
257 struct ethtool_drvinfo *info)
258{
259
260 usbnet_get_drvinfo(net, info);
261}
262
263static u32 dm9601_get_link(struct net_device *net)
264{
265 struct usbnet *dev = netdev_priv(net);
266
267 return mii_link_ok(&dev->mii);
268}
269
270static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
271{
272 struct usbnet *dev = netdev_priv(net);
273
274 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
275}
276
277static const struct ethtool_ops dm9601_ethtool_ops = {
278 .get_drvinfo = dm9601_get_drvinfo,
279 .get_link = dm9601_get_link,
280 .get_msglevel = usbnet_get_msglevel,
281 .set_msglevel = usbnet_set_msglevel,
282 .get_eeprom_len = dm9601_get_eeprom_len,
283 .get_eeprom = dm9601_get_eeprom,
284 .nway_reset = usbnet_nway_reset,
285 .get_link_ksettings = usbnet_get_link_ksettings_mii,
286 .set_link_ksettings = usbnet_set_link_ksettings_mii,
287};
288
289static void dm9601_set_multicast(struct net_device *net)
290{
291 struct usbnet *dev = netdev_priv(net);
292
293
294 u8 *hashes = (u8 *) & dev->data;
295 u8 rx_ctl = 0x31;
296
297 memset(hashes, 0x00, DM_MCAST_SIZE);
298 hashes[DM_MCAST_SIZE - 1] |= 0x80;
299
300 if (net->flags & IFF_PROMISC) {
301 rx_ctl |= 0x02;
302 } else if (net->flags & IFF_ALLMULTI ||
303 netdev_mc_count(net) > DM_MAX_MCAST) {
304 rx_ctl |= 0x08;
305 } else if (!netdev_mc_empty(net)) {
306 struct netdev_hw_addr *ha;
307
308 netdev_for_each_mc_addr(ha, net) {
309 u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
310 hashes[crc >> 3] |= 1 << (crc & 0x7);
311 }
312 }
313
314 dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes);
315 dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
316}
317
318static void __dm9601_set_mac_address(struct usbnet *dev)
319{
320 dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
321}
322
323static int dm9601_set_mac_address(struct net_device *net, void *p)
324{
325 struct sockaddr *addr = p;
326 struct usbnet *dev = netdev_priv(net);
327
328 if (!is_valid_ether_addr(addr->sa_data)) {
329 dev_err(&net->dev, "not setting invalid mac address %pM\n",
330 addr->sa_data);
331 return -EINVAL;
332 }
333
334 memcpy(net->dev_addr, addr->sa_data, net->addr_len);
335 __dm9601_set_mac_address(dev);
336
337 return 0;
338}
339
340static const struct net_device_ops dm9601_netdev_ops = {
341 .ndo_open = usbnet_open,
342 .ndo_stop = usbnet_stop,
343 .ndo_start_xmit = usbnet_start_xmit,
344 .ndo_tx_timeout = usbnet_tx_timeout,
345 .ndo_change_mtu = usbnet_change_mtu,
346 .ndo_get_stats64 = dev_get_tstats64,
347 .ndo_validate_addr = eth_validate_addr,
348 .ndo_eth_ioctl = dm9601_ioctl,
349 .ndo_set_rx_mode = dm9601_set_multicast,
350 .ndo_set_mac_address = dm9601_set_mac_address,
351};
352
353static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
354{
355 int ret;
356 u8 mac[ETH_ALEN], id;
357
358 ret = usbnet_get_endpoints(dev, intf);
359 if (ret)
360 goto out;
361
362 dev->net->netdev_ops = &dm9601_netdev_ops;
363 dev->net->ethtool_ops = &dm9601_ethtool_ops;
364 dev->net->hard_header_len += DM_TX_OVERHEAD;
365 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
366
367
368
369
370
371 dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1;
372
373 dev->mii.dev = dev->net;
374 dev->mii.mdio_read = dm9601_mdio_read;
375 dev->mii.mdio_write = dm9601_mdio_write;
376 dev->mii.phy_id_mask = 0x1f;
377 dev->mii.reg_num_mask = 0x1f;
378
379
380 dm_write_reg(dev, DM_NET_CTRL, 1);
381 udelay(20);
382
383
384 if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) {
385 printk(KERN_ERR "Error reading MAC address\n");
386 ret = -ENODEV;
387 goto out;
388 }
389
390
391
392
393 if (is_valid_ether_addr(mac))
394 memcpy(dev->net->dev_addr, mac, ETH_ALEN);
395 else {
396 printk(KERN_WARNING
397 "dm9601: No valid MAC address in EEPROM, using %pM\n",
398 dev->net->dev_addr);
399 __dm9601_set_mac_address(dev);
400 }
401
402 if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) {
403 netdev_err(dev->net, "Error reading chip ID\n");
404 ret = -ENODEV;
405 goto out;
406 }
407
408
409 if (id == ID_DM9620) {
410 u8 mode;
411
412 if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) {
413 netdev_err(dev->net, "Error reading MODE_CTRL\n");
414 ret = -ENODEV;
415 goto out;
416 }
417 dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
418 }
419
420
421 dm_write_reg(dev, DM_GPR_CTRL, 1);
422 dm_write_reg(dev, DM_GPR_DATA, 0);
423
424
425 dm9601_set_multicast(dev->net);
426
427 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
428 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
429 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
430 mii_nway_restart(&dev->mii);
431
432out:
433 return ret;
434}
435
436static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
437{
438 u8 status;
439 int len;
440
441
442
443
444
445
446
447
448
449 if (unlikely(skb->len < DM_RX_OVERHEAD)) {
450 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
451 return 0;
452 }
453
454 status = skb->data[0];
455 len = (skb->data[1] | (skb->data[2] << 8)) - 4;
456
457 if (unlikely(status & 0xbf)) {
458 if (status & 0x01) dev->net->stats.rx_fifo_errors++;
459 if (status & 0x02) dev->net->stats.rx_crc_errors++;
460 if (status & 0x04) dev->net->stats.rx_frame_errors++;
461 if (status & 0x20) dev->net->stats.rx_missed_errors++;
462 if (status & 0x90) dev->net->stats.rx_length_errors++;
463 return 0;
464 }
465
466 skb_pull(skb, 3);
467 skb_trim(skb, len);
468
469 return 1;
470}
471
472static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
473 gfp_t flags)
474{
475 int len, pad;
476
477
478
479
480
481
482
483 len = skb->len + DM_TX_OVERHEAD;
484
485
486
487
488
489
490 while ((len & 1) || !(len % dev->maxpacket))
491 len++;
492
493 len -= DM_TX_OVERHEAD;
494 pad = len - skb->len;
495
496 if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) {
497 struct sk_buff *skb2;
498
499 skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags);
500 dev_kfree_skb_any(skb);
501 skb = skb2;
502 if (!skb)
503 return NULL;
504 }
505
506 __skb_push(skb, DM_TX_OVERHEAD);
507
508 if (pad) {
509 memset(skb->data + skb->len, 0, pad);
510 __skb_put(skb, pad);
511 }
512
513 skb->data[0] = len;
514 skb->data[1] = len >> 8;
515
516 return skb;
517}
518
519static void dm9601_status(struct usbnet *dev, struct urb *urb)
520{
521 int link;
522 u8 *buf;
523
524
525
526
527
528
529
530
531
532
533
534
535 if (urb->actual_length < 8)
536 return;
537
538 buf = urb->transfer_buffer;
539
540 link = !!(buf[0] & 0x40);
541 if (netif_carrier_ok(dev->net) != link) {
542 usbnet_link_change(dev, link, 1);
543 netdev_dbg(dev->net, "Link Status is: %d\n", link);
544 }
545}
546
547static int dm9601_link_reset(struct usbnet *dev)
548{
549 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
550
551 mii_check_media(&dev->mii, 1, 1);
552 mii_ethtool_gset(&dev->mii, &ecmd);
553
554 netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n",
555 ethtool_cmd_speed(&ecmd), ecmd.duplex);
556
557 return 0;
558}
559
560static const struct driver_info dm9601_info = {
561 .description = "Davicom DM96xx USB 10/100 Ethernet",
562 .flags = FLAG_ETHER | FLAG_LINK_INTR,
563 .bind = dm9601_bind,
564 .rx_fixup = dm9601_rx_fixup,
565 .tx_fixup = dm9601_tx_fixup,
566 .status = dm9601_status,
567 .link_reset = dm9601_link_reset,
568 .reset = dm9601_link_reset,
569};
570
571static const struct usb_device_id products[] = {
572 {
573 USB_DEVICE(0x07aa, 0x9601),
574 .driver_info = (unsigned long)&dm9601_info,
575 },
576 {
577 USB_DEVICE(0x0a46, 0x9601),
578 .driver_info = (unsigned long)&dm9601_info,
579 },
580 {
581 USB_DEVICE(0x0a46, 0x6688),
582 .driver_info = (unsigned long)&dm9601_info,
583 },
584 {
585 USB_DEVICE(0x0a46, 0x0268),
586 .driver_info = (unsigned long)&dm9601_info,
587 },
588 {
589 USB_DEVICE(0x0a46, 0x8515),
590 .driver_info = (unsigned long)&dm9601_info,
591 },
592 {
593 USB_DEVICE(0x0a47, 0x9601),
594 .driver_info = (unsigned long)&dm9601_info,
595 },
596 {
597 USB_DEVICE(0x0fe6, 0x8101),
598 .driver_info = (unsigned long)&dm9601_info,
599 },
600 {
601 USB_DEVICE(0x0fe6, 0x9700),
602 .driver_info = (unsigned long)&dm9601_info,
603 },
604 {
605 USB_DEVICE(0x0a46, 0x9000),
606 .driver_info = (unsigned long)&dm9601_info,
607 },
608 {
609 USB_DEVICE(0x0a46, 0x9620),
610 .driver_info = (unsigned long)&dm9601_info,
611 },
612 {
613 USB_DEVICE(0x0a46, 0x9621),
614 .driver_info = (unsigned long)&dm9601_info,
615 },
616 {
617 USB_DEVICE(0x0a46, 0x9622),
618 .driver_info = (unsigned long)&dm9601_info,
619 },
620 {
621 USB_DEVICE(0x0a46, 0x0269),
622 .driver_info = (unsigned long)&dm9601_info,
623 },
624 {
625 USB_DEVICE(0x0a46, 0x1269),
626 .driver_info = (unsigned long)&dm9601_info,
627 },
628 {
629 USB_DEVICE(0x0586, 0x3427),
630 .driver_info = (unsigned long)&dm9601_info,
631 },
632 {},
633};
634
635MODULE_DEVICE_TABLE(usb, products);
636
637static struct usb_driver dm9601_driver = {
638 .name = "dm9601",
639 .id_table = products,
640 .probe = usbnet_probe,
641 .disconnect = usbnet_disconnect,
642 .suspend = usbnet_suspend,
643 .resume = usbnet_resume,
644 .disable_hub_initiated_lpm = 1,
645};
646
647module_usb_driver(dm9601_driver);
648
649MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
650MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices");
651MODULE_LICENSE("GPL");
652
