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Merge branch 'for-3.11' of git://linux-nfs.org/~bfields/linux
[linux-2.6.git] / drivers / net / usb / dm9601.c
blob2dbb9460349d3659fc738eabb35f01cb0022e049
1 /*
2 * Davicom DM9601 USB 1.1 10/100Mbps ethernet devices
3 *
4 * Peter Korsgaard <jacmet@sunsite.dk>
5 *
6 * This file is licensed under the terms of the GNU General Public License
7 * version 2. This program is licensed "as is" without any warranty of any
8 * kind, whether express or implied.
9 */
10
11 //#define DEBUG
12
13 #include <linux/module.h>
14 #include <linux/sched.h>
15 #include <linux/stddef.h>
16 #include <linux/init.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/ethtool.h>
20 #include <linux/mii.h>
21 #include <linux/usb.h>
22 #include <linux/crc32.h>
23 #include <linux/usb/usbnet.h>
24 #include <linux/slab.h>
25
26 /* datasheet:
27 http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf
28 */
29
30 /* control requests */
31 #define DM_READ_REGS 0x00
32 #define DM_WRITE_REGS 0x01
33 #define DM_READ_MEMS 0x02
34 #define DM_WRITE_REG 0x03
35 #define DM_WRITE_MEMS 0x05
36 #define DM_WRITE_MEM 0x07
37
38 /* registers */
39 #define DM_NET_CTRL 0x00
40 #define DM_RX_CTRL 0x05
41 #define DM_SHARED_CTRL 0x0b
42 #define DM_SHARED_ADDR 0x0c
43 #define DM_SHARED_DATA 0x0d /* low + high */
44 #define DM_PHY_ADDR 0x10 /* 6 bytes */
45 #define DM_MCAST_ADDR 0x16 /* 8 bytes */
46 #define DM_GPR_CTRL 0x1e
47 #define DM_GPR_DATA 0x1f
48 #define DM_CHIP_ID 0x2c
49 #define DM_MODE_CTRL 0x91 /* only on dm9620 */
50
51 /* chip id values */
52 #define ID_DM9601 0
53 #define ID_DM9620 1
54
55 #define DM_MAX_MCAST 64
56 #define DM_MCAST_SIZE 8
57 #define DM_EEPROM_LEN 256
58 #define DM_TX_OVERHEAD 2 /* 2 byte header */
59 #define DM_RX_OVERHEAD 7 /* 3 byte header + 4 byte crc tail */
60 #define DM_TIMEOUT 1000
61
62 static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
63 {
64 int err;
65 err = usbnet_read_cmd(dev, DM_READ_REGS,
66 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
67 0, reg, data, length);
68 if(err != length && err >= 0)
69 err = -EINVAL;
70 return err;
71 }
72
73 static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
74 {
75 return dm_read(dev, reg, 1, value);
76 }
77
78 static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data)
79 {
80 int err;
81 err = usbnet_write_cmd(dev, DM_WRITE_REGS,
82 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
83 0, reg, data, length);
84
85 if (err >= 0 && err < length)
86 err = -EINVAL;
87 return err;
88 }
89
90 static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value)
91 {
92 return usbnet_write_cmd(dev, DM_WRITE_REG,
93 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
94 value, reg, NULL, 0);
95 }
96
97 static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data)
98 {
99 usbnet_write_cmd_async(dev, DM_WRITE_REGS,
100 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
101 0, reg, data, length);
102 }
103
104 static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
105 {
106 usbnet_write_cmd_async(dev, DM_WRITE_REG,
107 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
108 value, reg, NULL, 0);
109 }
110
111 static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value)
112 {
113 int ret, i;
114
115 mutex_lock(&dev->phy_mutex);
116
117 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
118 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);
119
120 for (i = 0; i < DM_TIMEOUT; i++) {
121 u8 tmp = 0;
122
123 udelay(1);
124 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
125 if (ret < 0)
126 goto out;
127
128 /* ready */
129 if ((tmp & 1) == 0)
130 break;
131 }
132
133 if (i == DM_TIMEOUT) {
134 netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom");
135 ret = -EIO;
136 goto out;
137 }
138
139 dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
140 ret = dm_read(dev, DM_SHARED_DATA, 2, value);
141
142 netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n",
143 phy, reg, *value, ret);
144
145 out:
146 mutex_unlock(&dev->phy_mutex);
147 return ret;
148 }
149
150 static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
151 {
152 int ret, i;
153
154 mutex_lock(&dev->phy_mutex);
155
156 ret = dm_write(dev, DM_SHARED_DATA, 2, &value);
157 if (ret < 0)
158 goto out;
159
160 dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
161 dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);
162
163 for (i = 0; i < DM_TIMEOUT; i++) {
164 u8 tmp = 0;
165
166 udelay(1);
167 ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
168 if (ret < 0)
169 goto out;
170
171 /* ready */
172 if ((tmp & 1) == 0)
173 break;
174 }
175
176 if (i == DM_TIMEOUT) {
177 netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom");
178 ret = -EIO;
179 goto out;
180 }
181
182 dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
183
184 out:
185 mutex_unlock(&dev->phy_mutex);
186 return ret;
187 }
188
189 static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
190 {
191 return dm_read_shared_word(dev, 0, offset, value);
192 }
193
194
195
196 static int dm9601_get_eeprom_len(struct net_device *dev)
197 {
198 return DM_EEPROM_LEN;
199 }
200
201 static int dm9601_get_eeprom(struct net_device *net,
202 struct ethtool_eeprom *eeprom, u8 * data)
203 {
204 struct usbnet *dev = netdev_priv(net);
205 __le16 *ebuf = (__le16 *) data;
206 int i;
207
208 /* access is 16bit */
209 if ((eeprom->offset % 2) || (eeprom->len % 2))
210 return -EINVAL;
211
212 for (i = 0; i < eeprom->len / 2; i++) {
213 if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i,
214 &ebuf[i]) < 0)
215 return -EINVAL;
216 }
217 return 0;
218 }
219
220 static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc)
221 {
222 struct usbnet *dev = netdev_priv(netdev);
223
224 __le16 res;
225
226 if (phy_id) {
227 netdev_dbg(dev->net, "Only internal phy supported\n");
228 return 0;
229 }
230
231 dm_read_shared_word(dev, 1, loc, &res);
232
233 netdev_dbg(dev->net,
234 "dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
235 phy_id, loc, le16_to_cpu(res));
236
237 return le16_to_cpu(res);
238 }
239
240 static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
241 int val)
242 {
243 struct usbnet *dev = netdev_priv(netdev);
244 __le16 res = cpu_to_le16(val);
245
246 if (phy_id) {
247 netdev_dbg(dev->net, "Only internal phy supported\n");
248 return;
249 }
250
251 netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
252 phy_id, loc, val);
253
254 dm_write_shared_word(dev, 1, loc, res);
255 }
256
257 static void dm9601_get_drvinfo(struct net_device *net,
258 struct ethtool_drvinfo *info)
259 {
260 /* Inherit standard device info */
261 usbnet_get_drvinfo(net, info);
262 info->eedump_len = DM_EEPROM_LEN;
263 }
264
265 static u32 dm9601_get_link(struct net_device *net)
266 {
267 struct usbnet *dev = netdev_priv(net);
268
269 return mii_link_ok(&dev->mii);
270 }
271
272 static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
273 {
274 struct usbnet *dev = netdev_priv(net);
275
276 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
277 }
278
279 static const struct ethtool_ops dm9601_ethtool_ops = {
280 .get_drvinfo = dm9601_get_drvinfo,
281 .get_link = dm9601_get_link,
282 .get_msglevel = usbnet_get_msglevel,
283 .set_msglevel = usbnet_set_msglevel,
284 .get_eeprom_len = dm9601_get_eeprom_len,
285 .get_eeprom = dm9601_get_eeprom,
286 .get_settings = usbnet_get_settings,
287 .set_settings = usbnet_set_settings,
288 .nway_reset = usbnet_nway_reset,
289 };
290
291 static void dm9601_set_multicast(struct net_device *net)
292 {
293 struct usbnet *dev = netdev_priv(net);
294 /* We use the 20 byte dev->data for our 8 byte filter buffer
295 * to avoid allocating memory that is tricky to free later */
296 u8 *hashes = (u8 *) & dev->data;
297 u8 rx_ctl = 0x31;
298
299 memset(hashes, 0x00, DM_MCAST_SIZE);
300 hashes[DM_MCAST_SIZE - 1] |= 0x80; /* broadcast address */
301
302 if (net->flags & IFF_PROMISC) {
303 rx_ctl |= 0x02;
304 } else if (net->flags & IFF_ALLMULTI ||
305 netdev_mc_count(net) > DM_MAX_MCAST) {
306 rx_ctl |= 0x04;
307 } else if (!netdev_mc_empty(net)) {
308 struct netdev_hw_addr *ha;
309
310 netdev_for_each_mc_addr(ha, net) {
311 u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
312 hashes[crc >> 3] |= 1 << (crc & 0x7);
313 }
314 }
315
316 dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes);
317 dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
318 }
319
320 static void __dm9601_set_mac_address(struct usbnet *dev)
321 {
322 dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
323 }
324
325 static int dm9601_set_mac_address(struct net_device *net, void *p)
326 {
327 struct sockaddr *addr = p;
328 struct usbnet *dev = netdev_priv(net);
329
330 if (!is_valid_ether_addr(addr->sa_data)) {
331 dev_err(&net->dev, "not setting invalid mac address %pM\n",
332 addr->sa_data);
333 return -EINVAL;
334 }
335
336 memcpy(net->dev_addr, addr->sa_data, net->addr_len);
337 __dm9601_set_mac_address(dev);
338
339 return 0;
340 }
341
342 static const struct net_device_ops dm9601_netdev_ops = {
343 .ndo_open = usbnet_open,
344 .ndo_stop = usbnet_stop,
345 .ndo_start_xmit = usbnet_start_xmit,
346 .ndo_tx_timeout = usbnet_tx_timeout,
347 .ndo_change_mtu = usbnet_change_mtu,
348 .ndo_validate_addr = eth_validate_addr,
349 .ndo_do_ioctl = dm9601_ioctl,
350 .ndo_set_rx_mode = dm9601_set_multicast,
351 .ndo_set_mac_address = dm9601_set_mac_address,
352 };
353
354 static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
355 {
356 int ret;
357 u8 mac[ETH_ALEN], id;
358
359 ret = usbnet_get_endpoints(dev, intf);
360 if (ret)
361 goto out;
362
363 dev->net->netdev_ops = &dm9601_netdev_ops;
364 dev->net->ethtool_ops = &dm9601_ethtool_ops;
365 dev->net->hard_header_len += DM_TX_OVERHEAD;
366 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
367 dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD;
368
369 dev->mii.dev = dev->net;
370 dev->mii.mdio_read = dm9601_mdio_read;
371 dev->mii.mdio_write = dm9601_mdio_write;
372 dev->mii.phy_id_mask = 0x1f;
373 dev->mii.reg_num_mask = 0x1f;
374
375 /* reset */
376 dm_write_reg(dev, DM_NET_CTRL, 1);
377 udelay(20);
378
379 /* read MAC */
380 if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) {
381 printk(KERN_ERR "Error reading MAC address\n");
382 ret = -ENODEV;
383 goto out;
384 }
385
386 /*
387 * Overwrite the auto-generated address only with good ones.
388 */
389 if (is_valid_ether_addr(mac))
390 memcpy(dev->net->dev_addr, mac, ETH_ALEN);
391 else {
392 printk(KERN_WARNING
393 "dm9601: No valid MAC address in EEPROM, using %pM\n",
394 dev->net->dev_addr);
395 __dm9601_set_mac_address(dev);
396 }
397
398 if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) {
399 netdev_err(dev->net, "Error reading chip ID\n");
400 ret = -ENODEV;
401 goto out;
402 }
403
404 /* put dm9620 devices in dm9601 mode */
405 if (id == ID_DM9620) {
406 u8 mode;
407
408 if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) {
409 netdev_err(dev->net, "Error reading MODE_CTRL\n");
410 ret = -ENODEV;
411 goto out;
412 }
413 dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
414 }
415
416 /* power up phy */
417 dm_write_reg(dev, DM_GPR_CTRL, 1);
418 dm_write_reg(dev, DM_GPR_DATA, 0);
419
420 /* receive broadcast packets */
421 dm9601_set_multicast(dev->net);
422
423 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
424 dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
425 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
426 mii_nway_restart(&dev->mii);
427
428 out:
429 return ret;
430 }
431
432 static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
433 {
434 u8 status;
435 int len;
436
437 /* format:
438 b1: rx status
439 b2: packet length (incl crc) low
440 b3: packet length (incl crc) high
441 b4..n-4: packet data
442 bn-3..bn: ethernet crc
443 */
444
445 if (unlikely(skb->len < DM_RX_OVERHEAD)) {
446 dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
447 return 0;
448 }
449
450 status = skb->data[0];
451 len = (skb->data[1] | (skb->data[2] << 8)) - 4;
452
453 if (unlikely(status & 0xbf)) {
454 if (status & 0x01) dev->net->stats.rx_fifo_errors++;
455 if (status & 0x02) dev->net->stats.rx_crc_errors++;
456 if (status & 0x04) dev->net->stats.rx_frame_errors++;
457 if (status & 0x20) dev->net->stats.rx_missed_errors++;
458 if (status & 0x90) dev->net->stats.rx_length_errors++;
459 return 0;
460 }
461
462 skb_pull(skb, 3);
463 skb_trim(skb, len);
464
465 return 1;
466 }
467
468 static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
469 gfp_t flags)
470 {
471 int len;
472
473 /* format:
474 b1: packet length low
475 b2: packet length high
476 b3..n: packet data
477 */
478
479 len = skb->len;
480
481 if (skb_headroom(skb) < DM_TX_OVERHEAD) {
482 struct sk_buff *skb2;
483
484 skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, 0, flags);
485 dev_kfree_skb_any(skb);
486 skb = skb2;
487 if (!skb)
488 return NULL;
489 }
490
491 __skb_push(skb, DM_TX_OVERHEAD);
492
493 /* usbnet adds padding if length is a multiple of packet size
494 if so, adjust length value in header */
495 if ((skb->len % dev->maxpacket) == 0)
496 len++;
497
498 skb->data[0] = len;
499 skb->data[1] = len >> 8;
500
501 return skb;
502 }
503
504 static void dm9601_status(struct usbnet *dev, struct urb *urb)
505 {
506 int link;
507 u8 *buf;
508
509 /* format:
510 b0: net status
511 b1: tx status 1
512 b2: tx status 2
513 b3: rx status
514 b4: rx overflow
515 b5: rx count
516 b6: tx count
517 b7: gpr
518 */
519
520 if (urb->actual_length < 8)
521 return;
522
523 buf = urb->transfer_buffer;
524
525 link = !!(buf[0] & 0x40);
526 if (netif_carrier_ok(dev->net) != link) {
527 usbnet_link_change(dev, link, 1);
528 netdev_dbg(dev->net, "Link Status is: %d\n", link);
529 }
530 }
531
532 static int dm9601_link_reset(struct usbnet *dev)
533 {
534 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
535
536 mii_check_media(&dev->mii, 1, 1);
537 mii_ethtool_gset(&dev->mii, &ecmd);
538
539 netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n",
540 ethtool_cmd_speed(&ecmd), ecmd.duplex);
541
542 return 0;
543 }
544
545 static const struct driver_info dm9601_info = {
546 .description = "Davicom DM9601 USB Ethernet",
547 .flags = FLAG_ETHER | FLAG_LINK_INTR,
548 .bind = dm9601_bind,
549 .rx_fixup = dm9601_rx_fixup,
550 .tx_fixup = dm9601_tx_fixup,
551 .status = dm9601_status,
552 .link_reset = dm9601_link_reset,
553 .reset = dm9601_link_reset,
554 };
555
556 static const struct usb_device_id products[] = {
557 {
558 USB_DEVICE(0x07aa, 0x9601), /* Corega FEther USB-TXC */
559 .driver_info = (unsigned long)&dm9601_info,
560 },
561 {
562 USB_DEVICE(0x0a46, 0x9601), /* Davicom USB-100 */
563 .driver_info = (unsigned long)&dm9601_info,
564 },
565 {
566 USB_DEVICE(0x0a46, 0x6688), /* ZT6688 USB NIC */
567 .driver_info = (unsigned long)&dm9601_info,
568 },
569 {
570 USB_DEVICE(0x0a46, 0x0268), /* ShanTou ST268 USB NIC */
571 .driver_info = (unsigned long)&dm9601_info,
572 },
573 {
574 USB_DEVICE(0x0a46, 0x8515), /* ADMtek ADM8515 USB NIC */
575 .driver_info = (unsigned long)&dm9601_info,
576 },
577 {
578 USB_DEVICE(0x0a47, 0x9601), /* Hirose USB-100 */
579 .driver_info = (unsigned long)&dm9601_info,
580 },
581 {
582 USB_DEVICE(0x0fe6, 0x8101), /* DM9601 USB to Fast Ethernet Adapter */
583 .driver_info = (unsigned long)&dm9601_info,
584 },
585 {
586 USB_DEVICE(0x0fe6, 0x9700), /* DM9601 USB to Fast Ethernet Adapter */
587 .driver_info = (unsigned long)&dm9601_info,
588 },
589 {
590 USB_DEVICE(0x0a46, 0x9000), /* DM9000E */
591 .driver_info = (unsigned long)&dm9601_info,
592 },
593 {
594 USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */
595 .driver_info = (unsigned long)&dm9601_info,
596 },
597 {}, // END
598 };
599
600 MODULE_DEVICE_TABLE(usb, products);
601
602 static struct usb_driver dm9601_driver = {
603 .name = "dm9601",
604 .id_table = products,
605 .probe = usbnet_probe,
606 .disconnect = usbnet_disconnect,
607 .suspend = usbnet_suspend,
608 .resume = usbnet_resume,
609 .disable_hub_initiated_lpm = 1,
610 };
611
612 module_usb_driver(dm9601_driver);
613
614 MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
615 MODULE_DESCRIPTION("Davicom DM9601 USB 1.1 ethernet devices");
616 MODULE_LICENSE("GPL");
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