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Merge branch 'for-3.11' of git://linux-nfs.org/~bfields/linux
[linux-2.6.git] / drivers / net / usb / asix_common.c
blob577c72d5f3690dd3917d05fc8dcb9f9d89c354a4
1 /*
2 * ASIX AX8817X based USB 2.0 Ethernet Devices
3 * Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
4 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
5 * Copyright (C) 2006 James Painter <jamie.painter@iname.com>
6 * Copyright (c) 2002-2003 TiVo Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #include "asix.h"
24
25 int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
26 u16 size, void *data)
27 {
28 int ret;
29 ret = usbnet_read_cmd(dev, cmd,
30 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
31 value, index, data, size);
32
33 if (ret != size && ret >= 0)
34 return -EINVAL;
35 return ret;
36 }
37
38 int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
39 u16 size, void *data)
40 {
41 return usbnet_write_cmd(dev, cmd,
42 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
43 value, index, data, size);
44 }
45
46 void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
47 u16 size, void *data)
48 {
49 usbnet_write_cmd_async(dev, cmd,
50 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
51 value, index, data, size);
52 }
53
54 int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb,
55 struct asix_rx_fixup_info *rx)
56 {
57 int offset = 0;
58
59 while (offset + sizeof(u16) <= skb->len) {
60 u16 remaining = 0;
61 unsigned char *data;
62
63 if (!rx->size) {
64 if ((skb->len - offset == sizeof(u16)) ||
65 rx->split_head) {
66 if(!rx->split_head) {
67 rx->header = get_unaligned_le16(
68 skb->data + offset);
69 rx->split_head = true;
70 offset += sizeof(u16);
71 break;
72 } else {
73 rx->header |= (get_unaligned_le16(
74 skb->data + offset)
75 << 16);
76 rx->split_head = false;
77 offset += sizeof(u16);
78 }
79 } else {
80 rx->header = get_unaligned_le32(skb->data +
81 offset);
82 offset += sizeof(u32);
83 }
84
85 /* get the packet length */
86 rx->size = (u16) (rx->header & 0x7ff);
87 if (rx->size != ((~rx->header >> 16) & 0x7ff)) {
88 netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
89 rx->header, offset);
90 rx->size = 0;
91 return 0;
92 }
93 rx->ax_skb = netdev_alloc_skb_ip_align(dev->net,
94 rx->size);
95 if (!rx->ax_skb)
96 return 0;
97 }
98
99 if (rx->size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
100 netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
101 rx->size);
102 kfree_skb(rx->ax_skb);
103 rx->ax_skb = NULL;
104 rx->size = 0U;
105
106 return 0;
107 }
108
109 if (rx->size > skb->len - offset) {
110 remaining = rx->size - (skb->len - offset);
111 rx->size = skb->len - offset;
112 }
113
114 data = skb_put(rx->ax_skb, rx->size);
115 memcpy(data, skb->data + offset, rx->size);
116 if (!remaining)
117 usbnet_skb_return(dev, rx->ax_skb);
118
119 offset += (rx->size + 1) & 0xfffe;
120 rx->size = remaining;
121 }
122
123 if (skb->len != offset) {
124 netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n",
125 skb->len, offset);
126 return 0;
127 }
128
129 return 1;
130 }
131
132 int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb)
133 {
134 struct asix_common_private *dp = dev->driver_priv;
135 struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
136
137 return asix_rx_fixup_internal(dev, skb, rx);
138 }
139
140 struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
141 gfp_t flags)
142 {
143 int padlen;
144 int headroom = skb_headroom(skb);
145 int tailroom = skb_tailroom(skb);
146 u32 packet_len;
147 u32 padbytes = 0xffff0000;
148
149 padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4;
150
151 /* We need to push 4 bytes in front of frame (packet_len)
152 * and maybe add 4 bytes after the end (if padlen is 4)
153 *
154 * Avoid skb_copy_expand() expensive call, using following rules :
155 * - We are allowed to push 4 bytes in headroom if skb_header_cloned()
156 * is false (and if we have 4 bytes of headroom)
157 * - We are allowed to put 4 bytes at tail if skb_cloned()
158 * is false (and if we have 4 bytes of tailroom)
159 *
160 * TCP packets for example are cloned, but skb_header_release()
161 * was called in tcp stack, allowing us to use headroom for our needs.
162 */
163 if (!skb_header_cloned(skb) &&
164 !(padlen && skb_cloned(skb)) &&
165 headroom + tailroom >= 4 + padlen) {
166 /* following should not happen, but better be safe */
167 if (headroom < 4 ||
168 tailroom < padlen) {
169 skb->data = memmove(skb->head + 4, skb->data, skb->len);
170 skb_set_tail_pointer(skb, skb->len);
171 }
172 } else {
173 struct sk_buff *skb2;
174
175 skb2 = skb_copy_expand(skb, 4, padlen, flags);
176 dev_kfree_skb_any(skb);
177 skb = skb2;
178 if (!skb)
179 return NULL;
180 }
181
182 packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
183 skb_push(skb, 4);
184 cpu_to_le32s(&packet_len);
185 skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
186
187 if (padlen) {
188 cpu_to_le32s(&padbytes);
189 memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
190 skb_put(skb, sizeof(padbytes));
191 }
192 return skb;
193 }
194
195 int asix_set_sw_mii(struct usbnet *dev)
196 {
197 int ret;
198 ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
199 if (ret < 0)
200 netdev_err(dev->net, "Failed to enable software MII access\n");
201 return ret;
202 }
203
204 int asix_set_hw_mii(struct usbnet *dev)
205 {
206 int ret;
207 ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
208 if (ret < 0)
209 netdev_err(dev->net, "Failed to enable hardware MII access\n");
210 return ret;
211 }
212
213 int asix_read_phy_addr(struct usbnet *dev, int internal)
214 {
215 int offset = (internal ? 1 : 0);
216 u8 buf[2];
217 int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
218
219 netdev_dbg(dev->net, "asix_get_phy_addr()\n");
220
221 if (ret < 0) {
222 netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
223 goto out;
224 }
225 netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
226 *((__le16 *)buf));
227 ret = buf[offset];
228
229 out:
230 return ret;
231 }
232
233 int asix_get_phy_addr(struct usbnet *dev)
234 {
235 /* return the address of the internal phy */
236 return asix_read_phy_addr(dev, 1);
237 }
238
239
240 int asix_sw_reset(struct usbnet *dev, u8 flags)
241 {
242 int ret;
243
244 ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL);
245 if (ret < 0)
246 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);
247
248 return ret;
249 }
250
251 u16 asix_read_rx_ctl(struct usbnet *dev)
252 {
253 __le16 v;
254 int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v);
255
256 if (ret < 0) {
257 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
258 goto out;
259 }
260 ret = le16_to_cpu(v);
261 out:
262 return ret;
263 }
264
265 int asix_write_rx_ctl(struct usbnet *dev, u16 mode)
266 {
267 int ret;
268
269 netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
270 ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
271 if (ret < 0)
272 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
273 mode, ret);
274
275 return ret;
276 }
277
278 u16 asix_read_medium_status(struct usbnet *dev)
279 {
280 __le16 v;
281 int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
282
283 if (ret < 0) {
284 netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
285 ret);
286 return ret; /* TODO: callers not checking for error ret */
287 }
288
289 return le16_to_cpu(v);
290
291 }
292
293 int asix_write_medium_mode(struct usbnet *dev, u16 mode)
294 {
295 int ret;
296
297 netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
298 ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
299 if (ret < 0)
300 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
301 mode, ret);
302
303 return ret;
304 }
305
306 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep)
307 {
308 int ret;
309
310 netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
311 ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL);
312 if (ret < 0)
313 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
314 value, ret);
315
316 if (sleep)
317 msleep(sleep);
318
319 return ret;
320 }
321
322 /*
323 * AX88772 & AX88178 have a 16-bit RX_CTL value
324 */
325 void asix_set_multicast(struct net_device *net)
326 {
327 struct usbnet *dev = netdev_priv(net);
328 struct asix_data *data = (struct asix_data *)&dev->data;
329 u16 rx_ctl = AX_DEFAULT_RX_CTL;
330
331 if (net->flags & IFF_PROMISC) {
332 rx_ctl |= AX_RX_CTL_PRO;
333 } else if (net->flags & IFF_ALLMULTI ||
334 netdev_mc_count(net) > AX_MAX_MCAST) {
335 rx_ctl |= AX_RX_CTL_AMALL;
336 } else if (netdev_mc_empty(net)) {
337 /* just broadcast and directed */
338 } else {
339 /* We use the 20 byte dev->data
340 * for our 8 byte filter buffer
341 * to avoid allocating memory that
342 * is tricky to free later */
343 struct netdev_hw_addr *ha;
344 u32 crc_bits;
345
346 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
347
348 /* Build the multicast hash filter. */
349 netdev_for_each_mc_addr(ha, net) {
350 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
351 data->multi_filter[crc_bits >> 3] |=
352 1 << (crc_bits & 7);
353 }
354
355 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
356 AX_MCAST_FILTER_SIZE, data->multi_filter);
357
358 rx_ctl |= AX_RX_CTL_AM;
359 }
360
361 asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
362 }
363
364 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
365 {
366 struct usbnet *dev = netdev_priv(netdev);
367 __le16 res;
368
369 mutex_lock(&dev->phy_mutex);
370 asix_set_sw_mii(dev);
371 asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
372 (__u16)loc, 2, &res);
373 asix_set_hw_mii(dev);
374 mutex_unlock(&dev->phy_mutex);
375
376 netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
377 phy_id, loc, le16_to_cpu(res));
378
379 return le16_to_cpu(res);
380 }
381
382 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
383 {
384 struct usbnet *dev = netdev_priv(netdev);
385 __le16 res = cpu_to_le16(val);
386
387 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
388 phy_id, loc, val);
389 mutex_lock(&dev->phy_mutex);
390 asix_set_sw_mii(dev);
391 asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
392 asix_set_hw_mii(dev);
393 mutex_unlock(&dev->phy_mutex);
394 }
395
396 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
397 {
398 struct usbnet *dev = netdev_priv(net);
399 u8 opt;
400
401 if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
402 wolinfo->supported = 0;
403 wolinfo->wolopts = 0;
404 return;
405 }
406 wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
407 wolinfo->wolopts = 0;
408 if (opt & AX_MONITOR_LINK)
409 wolinfo->wolopts |= WAKE_PHY;
410 if (opt & AX_MONITOR_MAGIC)
411 wolinfo->wolopts |= WAKE_MAGIC;
412 }
413
414 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
415 {
416 struct usbnet *dev = netdev_priv(net);
417 u8 opt = 0;
418
419 if (wolinfo->wolopts & WAKE_PHY)
420 opt |= AX_MONITOR_LINK;
421 if (wolinfo->wolopts & WAKE_MAGIC)
422 opt |= AX_MONITOR_MAGIC;
423
424 if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
425 opt, 0, 0, NULL) < 0)
426 return -EINVAL;
427
428 return 0;
429 }
430
431 int asix_get_eeprom_len(struct net_device *net)
432 {
433 return AX_EEPROM_LEN;
434 }
435
436 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
437 u8 *data)
438 {
439 struct usbnet *dev = netdev_priv(net);
440 u16 *eeprom_buff;
441 int first_word, last_word;
442 int i;
443
444 if (eeprom->len == 0)
445 return -EINVAL;
446
447 eeprom->magic = AX_EEPROM_MAGIC;
448
449 first_word = eeprom->offset >> 1;
450 last_word = (eeprom->offset + eeprom->len - 1) >> 1;
451
452 eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
453 GFP_KERNEL);
454 if (!eeprom_buff)
455 return -ENOMEM;
456
457 /* ax8817x returns 2 bytes from eeprom on read */
458 for (i = first_word; i <= last_word; i++) {
459 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
460 &(eeprom_buff[i - first_word])) < 0) {
461 kfree(eeprom_buff);
462 return -EIO;
463 }
464 }
465
466 memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
467 kfree(eeprom_buff);
468 return 0;
469 }
470
471 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
472 u8 *data)
473 {
474 struct usbnet *dev = netdev_priv(net);
475 u16 *eeprom_buff;
476 int first_word, last_word;
477 int i;
478 int ret;
479
480 netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
481 eeprom->len, eeprom->offset, eeprom->magic);
482
483 if (eeprom->len == 0)
484 return -EINVAL;
485
486 if (eeprom->magic != AX_EEPROM_MAGIC)
487 return -EINVAL;
488
489 first_word = eeprom->offset >> 1;
490 last_word = (eeprom->offset + eeprom->len - 1) >> 1;
491
492 eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
493 GFP_KERNEL);
494 if (!eeprom_buff)
495 return -ENOMEM;
496
497 /* align data to 16 bit boundaries, read the missing data from
498 the EEPROM */
499 if (eeprom->offset & 1) {
500 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
501 &(eeprom_buff[0]));
502 if (ret < 0) {
503 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
504 goto free;
505 }
506 }
507
508 if ((eeprom->offset + eeprom->len) & 1) {
509 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
510 &(eeprom_buff[last_word - first_word]));
511 if (ret < 0) {
512 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
513 goto free;
514 }
515 }
516
517 memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);
518
519 /* write data to EEPROM */
520 ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL);
521 if (ret < 0) {
522 netdev_err(net, "Failed to enable EEPROM write\n");
523 goto free;
524 }
525 msleep(20);
526
527 for (i = first_word; i <= last_word; i++) {
528 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
529 i, eeprom_buff[i - first_word]);
530 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
531 eeprom_buff[i - first_word], 0, NULL);
532 if (ret < 0) {
533 netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
534 i);
535 goto free;
536 }
537 msleep(20);
538 }
539
540 ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL);
541 if (ret < 0) {
542 netdev_err(net, "Failed to disable EEPROM write\n");
543 goto free;
544 }
545
546 ret = 0;
547 free:
548 kfree(eeprom_buff);
549 return ret;
550 }
551
552 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
553 {
554 /* Inherit standard device info */
555 usbnet_get_drvinfo(net, info);
556 strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
557 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
558 info->eedump_len = AX_EEPROM_LEN;
559 }
560
561 int asix_set_mac_address(struct net_device *net, void *p)
562 {
563 struct usbnet *dev = netdev_priv(net);
564 struct asix_data *data = (struct asix_data *)&dev->data;
565 struct sockaddr *addr = p;
566
567 if (netif_running(net))
568 return -EBUSY;
569 if (!is_valid_ether_addr(addr->sa_data))
570 return -EADDRNOTAVAIL;
571
572 memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
573
574 /* We use the 20 byte dev->data
575 * for our 6 byte mac buffer
576 * to avoid allocating memory that
577 * is tricky to free later */
578 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
579 asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
580 data->mac_addr);
581
582 return 0;
583 }
Linus' kernel tree