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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, see <http://www.gnu.org/licenses/>.
20  */
21 
22 #include "asix.h"
23 
asix_read_cmd(struct usbnet * dev,u8 cmd,u16 value,u16 index,u16 size,void * data)24 int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
25 		  u16 size, void *data)
26 {
27 	int ret;
28 	ret = usbnet_read_cmd(dev, cmd,
29 			       USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
30 			       value, index, data, size);
31 
32 	if (ret != size && ret >= 0)
33 		return -EINVAL;
34 	return ret;
35 }
36 
asix_write_cmd(struct usbnet * dev,u8 cmd,u16 value,u16 index,u16 size,void * data)37 int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
38 		   u16 size, void *data)
39 {
40 	return usbnet_write_cmd(dev, cmd,
41 				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
42 				value, index, data, size);
43 }
44 
asix_write_cmd_async(struct usbnet * dev,u8 cmd,u16 value,u16 index,u16 size,void * data)45 void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
46 			  u16 size, void *data)
47 {
48 	usbnet_write_cmd_async(dev, cmd,
49 			       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
50 			       value, index, data, size);
51 }
52 
asix_rx_fixup_internal(struct usbnet * dev,struct sk_buff * skb,struct asix_rx_fixup_info * rx)53 int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb,
54 			   struct asix_rx_fixup_info *rx)
55 {
56 	int offset = 0;
57 	u16 size;
58 
59 	/* When an Ethernet frame spans multiple URB socket buffers,
60 	 * do a sanity test for the Data header synchronisation.
61 	 * Attempt to detect the situation of the previous socket buffer having
62 	 * been truncated or a socket buffer was missing. These situations
63 	 * cause a discontinuity in the data stream and therefore need to avoid
64 	 * appending bad data to the end of the current netdev socket buffer.
65 	 * Also avoid unnecessarily discarding a good current netdev socket
66 	 * buffer.
67 	 */
68 	if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) {
69 		offset = ((rx->remaining + 1) & 0xfffe);
70 		rx->header = get_unaligned_le32(skb->data + offset);
71 		offset = 0;
72 
73 		size = (u16)(rx->header & 0x7ff);
74 		if (size != ((~rx->header >> 16) & 0x7ff)) {
75 			netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n",
76 				   rx->remaining);
77 			if (rx->ax_skb) {
78 				kfree_skb(rx->ax_skb);
79 				rx->ax_skb = NULL;
80 				/* Discard the incomplete netdev Ethernet frame
81 				 * and assume the Data header is at the start of
82 				 * the current URB socket buffer.
83 				 */
84 			}
85 			rx->remaining = 0;
86 		}
87 	}
88 
89 	while (offset + sizeof(u16) <= skb->len) {
90 		u16 copy_length;
91 		unsigned char *data;
92 
93 		if (!rx->remaining) {
94 			if (skb->len - offset == sizeof(u16)) {
95 				rx->header = get_unaligned_le16(
96 						skb->data + offset);
97 				rx->split_head = true;
98 				offset += sizeof(u16);
99 				break;
100 			}
101 
102 			if (rx->split_head == true) {
103 				rx->header |= (get_unaligned_le16(
104 						skb->data + offset) << 16);
105 				rx->split_head = false;
106 				offset += sizeof(u16);
107 			} else {
108 				rx->header = get_unaligned_le32(skb->data +
109 								offset);
110 				offset += sizeof(u32);
111 			}
112 
113 			/* take frame length from Data header 32-bit word */
114 			size = (u16)(rx->header & 0x7ff);
115 			if (size != ((~rx->header >> 16) & 0x7ff)) {
116 				netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
117 					   rx->header, offset);
118 				return 0;
119 			}
120 			if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
121 				netdev_err(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
122 					   size);
123 				return 0;
124 			}
125 
126 			/* Sometimes may fail to get a netdev socket buffer but
127 			 * continue to process the URB socket buffer so that
128 			 * synchronisation of the Ethernet frame Data header
129 			 * word is maintained.
130 			 */
131 			rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
132 
133 			rx->remaining = size;
134 		}
135 
136 		if (rx->remaining > skb->len - offset) {
137 			copy_length = skb->len - offset;
138 			rx->remaining -= copy_length;
139 		} else {
140 			copy_length = rx->remaining;
141 			rx->remaining = 0;
142 		}
143 
144 		if (rx->ax_skb) {
145 			data = skb_put(rx->ax_skb, copy_length);
146 			memcpy(data, skb->data + offset, copy_length);
147 			if (!rx->remaining)
148 				usbnet_skb_return(dev, rx->ax_skb);
149 		}
150 
151 		offset += (copy_length + 1) & 0xfffe;
152 	}
153 
154 	if (skb->len != offset) {
155 		netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n",
156 			   skb->len, offset);
157 		return 0;
158 	}
159 
160 	return 1;
161 }
162 
asix_rx_fixup_common(struct usbnet * dev,struct sk_buff * skb)163 int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb)
164 {
165 	struct asix_common_private *dp = dev->driver_priv;
166 	struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
167 
168 	return asix_rx_fixup_internal(dev, skb, rx);
169 }
170 
asix_tx_fixup(struct usbnet * dev,struct sk_buff * skb,gfp_t flags)171 struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
172 			      gfp_t flags)
173 {
174 	int padlen;
175 	int headroom = skb_headroom(skb);
176 	int tailroom = skb_tailroom(skb);
177 	u32 packet_len;
178 	u32 padbytes = 0xffff0000;
179 
180 	padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4;
181 
182 	/* We need to push 4 bytes in front of frame (packet_len)
183 	 * and maybe add 4 bytes after the end (if padlen is 4)
184 	 *
185 	 * Avoid skb_copy_expand() expensive call, using following rules :
186 	 * - We are allowed to push 4 bytes in headroom if skb_header_cloned()
187 	 *   is false (and if we have 4 bytes of headroom)
188 	 * - We are allowed to put 4 bytes at tail if skb_cloned()
189 	 *   is false (and if we have 4 bytes of tailroom)
190 	 *
191 	 * TCP packets for example are cloned, but skb_header_release()
192 	 * was called in tcp stack, allowing us to use headroom for our needs.
193 	 */
194 	if (!skb_header_cloned(skb) &&
195 	    !(padlen && skb_cloned(skb)) &&
196 	    headroom + tailroom >= 4 + padlen) {
197 		/* following should not happen, but better be safe */
198 		if (headroom < 4 ||
199 		    tailroom < padlen) {
200 			skb->data = memmove(skb->head + 4, skb->data, skb->len);
201 			skb_set_tail_pointer(skb, skb->len);
202 		}
203 	} else {
204 		struct sk_buff *skb2;
205 
206 		skb2 = skb_copy_expand(skb, 4, padlen, flags);
207 		dev_kfree_skb_any(skb);
208 		skb = skb2;
209 		if (!skb)
210 			return NULL;
211 	}
212 
213 	packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
214 	skb_push(skb, 4);
215 	cpu_to_le32s(&packet_len);
216 	skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
217 
218 	if (padlen) {
219 		cpu_to_le32s(&padbytes);
220 		memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
221 		skb_put(skb, sizeof(padbytes));
222 	}
223 
224 	usbnet_set_skb_tx_stats(skb, 1, 0);
225 	return skb;
226 }
227 
asix_set_sw_mii(struct usbnet * dev)228 int asix_set_sw_mii(struct usbnet *dev)
229 {
230 	int ret;
231 	ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
232 	if (ret < 0)
233 		netdev_err(dev->net, "Failed to enable software MII access\n");
234 	return ret;
235 }
236 
asix_set_hw_mii(struct usbnet * dev)237 int asix_set_hw_mii(struct usbnet *dev)
238 {
239 	int ret;
240 	ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
241 	if (ret < 0)
242 		netdev_err(dev->net, "Failed to enable hardware MII access\n");
243 	return ret;
244 }
245 
asix_read_phy_addr(struct usbnet * dev,int internal)246 int asix_read_phy_addr(struct usbnet *dev, int internal)
247 {
248 	int offset = (internal ? 1 : 0);
249 	u8 buf[2];
250 	int ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf);
251 
252 	netdev_dbg(dev->net, "asix_get_phy_addr()\n");
253 
254 	if (ret < 2) {
255 		netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
256 		goto out;
257 	}
258 	netdev_dbg(dev->net, "asix_get_phy_addr() returning 0x%04x\n",
259 		   *((__le16 *)buf));
260 	ret = buf[offset];
261 
262 out:
263 	return ret;
264 }
265 
asix_get_phy_addr(struct usbnet * dev)266 int asix_get_phy_addr(struct usbnet *dev)
267 {
268 	/* return the address of the internal phy */
269 	return asix_read_phy_addr(dev, 1);
270 }
271 
272 
asix_sw_reset(struct usbnet * dev,u8 flags)273 int asix_sw_reset(struct usbnet *dev, u8 flags)
274 {
275 	int ret;
276 
277         ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL);
278 	if (ret < 0)
279 		netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);
280 
281 	return ret;
282 }
283 
asix_read_rx_ctl(struct usbnet * dev)284 u16 asix_read_rx_ctl(struct usbnet *dev)
285 {
286 	__le16 v;
287 	int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v);
288 
289 	if (ret < 0) {
290 		netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
291 		goto out;
292 	}
293 	ret = le16_to_cpu(v);
294 out:
295 	return ret;
296 }
297 
asix_write_rx_ctl(struct usbnet * dev,u16 mode)298 int asix_write_rx_ctl(struct usbnet *dev, u16 mode)
299 {
300 	int ret;
301 
302 	netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
303 	ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
304 	if (ret < 0)
305 		netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
306 			   mode, ret);
307 
308 	return ret;
309 }
310 
asix_read_medium_status(struct usbnet * dev)311 u16 asix_read_medium_status(struct usbnet *dev)
312 {
313 	__le16 v;
314 	int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
315 
316 	if (ret < 0) {
317 		netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
318 			   ret);
319 		return ret;	/* TODO: callers not checking for error ret */
320 	}
321 
322 	return le16_to_cpu(v);
323 
324 }
325 
asix_write_medium_mode(struct usbnet * dev,u16 mode)326 int asix_write_medium_mode(struct usbnet *dev, u16 mode)
327 {
328 	int ret;
329 
330 	netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
331 	ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
332 	if (ret < 0)
333 		netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
334 			   mode, ret);
335 
336 	return ret;
337 }
338 
asix_write_gpio(struct usbnet * dev,u16 value,int sleep)339 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep)
340 {
341 	int ret;
342 
343 	netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
344 	ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL);
345 	if (ret < 0)
346 		netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
347 			   value, ret);
348 
349 	if (sleep)
350 		msleep(sleep);
351 
352 	return ret;
353 }
354 
355 /*
356  * AX88772 & AX88178 have a 16-bit RX_CTL value
357  */
asix_set_multicast(struct net_device * net)358 void asix_set_multicast(struct net_device *net)
359 {
360 	struct usbnet *dev = netdev_priv(net);
361 	struct asix_data *data = (struct asix_data *)&dev->data;
362 	u16 rx_ctl = AX_DEFAULT_RX_CTL;
363 
364 	if (net->flags & IFF_PROMISC) {
365 		rx_ctl |= AX_RX_CTL_PRO;
366 	} else if (net->flags & IFF_ALLMULTI ||
367 		   netdev_mc_count(net) > AX_MAX_MCAST) {
368 		rx_ctl |= AX_RX_CTL_AMALL;
369 	} else if (netdev_mc_empty(net)) {
370 		/* just broadcast and directed */
371 	} else {
372 		/* We use the 20 byte dev->data
373 		 * for our 8 byte filter buffer
374 		 * to avoid allocating memory that
375 		 * is tricky to free later */
376 		struct netdev_hw_addr *ha;
377 		u32 crc_bits;
378 
379 		memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
380 
381 		/* Build the multicast hash filter. */
382 		netdev_for_each_mc_addr(ha, net) {
383 			crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
384 			data->multi_filter[crc_bits >> 3] |=
385 			    1 << (crc_bits & 7);
386 		}
387 
388 		asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
389 				   AX_MCAST_FILTER_SIZE, data->multi_filter);
390 
391 		rx_ctl |= AX_RX_CTL_AM;
392 	}
393 
394 	asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
395 }
396 
asix_mdio_read(struct net_device * netdev,int phy_id,int loc)397 int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
398 {
399 	struct usbnet *dev = netdev_priv(netdev);
400 	__le16 res;
401 
402 	mutex_lock(&dev->phy_mutex);
403 	asix_set_sw_mii(dev);
404 	asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
405 				(__u16)loc, 2, &res);
406 	asix_set_hw_mii(dev);
407 	mutex_unlock(&dev->phy_mutex);
408 
409 	netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
410 		   phy_id, loc, le16_to_cpu(res));
411 
412 	return le16_to_cpu(res);
413 }
414 
asix_mdio_write(struct net_device * netdev,int phy_id,int loc,int val)415 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
416 {
417 	struct usbnet *dev = netdev_priv(netdev);
418 	__le16 res = cpu_to_le16(val);
419 
420 	netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
421 		   phy_id, loc, val);
422 	mutex_lock(&dev->phy_mutex);
423 	asix_set_sw_mii(dev);
424 	asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
425 	asix_set_hw_mii(dev);
426 	mutex_unlock(&dev->phy_mutex);
427 }
428 
asix_get_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)429 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
430 {
431 	struct usbnet *dev = netdev_priv(net);
432 	u8 opt;
433 
434 	if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
435 		wolinfo->supported = 0;
436 		wolinfo->wolopts = 0;
437 		return;
438 	}
439 	wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
440 	wolinfo->wolopts = 0;
441 	if (opt & AX_MONITOR_LINK)
442 		wolinfo->wolopts |= WAKE_PHY;
443 	if (opt & AX_MONITOR_MAGIC)
444 		wolinfo->wolopts |= WAKE_MAGIC;
445 }
446 
asix_set_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)447 int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
448 {
449 	struct usbnet *dev = netdev_priv(net);
450 	u8 opt = 0;
451 
452 	if (wolinfo->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
453 		return -EINVAL;
454 
455 	if (wolinfo->wolopts & WAKE_PHY)
456 		opt |= AX_MONITOR_LINK;
457 	if (wolinfo->wolopts & WAKE_MAGIC)
458 		opt |= AX_MONITOR_MAGIC;
459 
460 	if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
461 			      opt, 0, 0, NULL) < 0)
462 		return -EINVAL;
463 
464 	return 0;
465 }
466 
asix_get_eeprom_len(struct net_device * net)467 int asix_get_eeprom_len(struct net_device *net)
468 {
469 	return AX_EEPROM_LEN;
470 }
471 
asix_get_eeprom(struct net_device * net,struct ethtool_eeprom * eeprom,u8 * data)472 int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
473 		    u8 *data)
474 {
475 	struct usbnet *dev = netdev_priv(net);
476 	u16 *eeprom_buff;
477 	int first_word, last_word;
478 	int i;
479 
480 	if (eeprom->len == 0)
481 		return -EINVAL;
482 
483 	eeprom->magic = AX_EEPROM_MAGIC;
484 
485 	first_word = eeprom->offset >> 1;
486 	last_word = (eeprom->offset + eeprom->len - 1) >> 1;
487 
488 	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
489 			      GFP_KERNEL);
490 	if (!eeprom_buff)
491 		return -ENOMEM;
492 
493 	/* ax8817x returns 2 bytes from eeprom on read */
494 	for (i = first_word; i <= last_word; i++) {
495 		if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
496 				  &(eeprom_buff[i - first_word])) < 0) {
497 			kfree(eeprom_buff);
498 			return -EIO;
499 		}
500 	}
501 
502 	memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
503 	kfree(eeprom_buff);
504 	return 0;
505 }
506 
asix_set_eeprom(struct net_device * net,struct ethtool_eeprom * eeprom,u8 * data)507 int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
508 		    u8 *data)
509 {
510 	struct usbnet *dev = netdev_priv(net);
511 	u16 *eeprom_buff;
512 	int first_word, last_word;
513 	int i;
514 	int ret;
515 
516 	netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
517 		   eeprom->len, eeprom->offset, eeprom->magic);
518 
519 	if (eeprom->len == 0)
520 		return -EINVAL;
521 
522 	if (eeprom->magic != AX_EEPROM_MAGIC)
523 		return -EINVAL;
524 
525 	first_word = eeprom->offset >> 1;
526 	last_word = (eeprom->offset + eeprom->len - 1) >> 1;
527 
528 	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
529 			      GFP_KERNEL);
530 	if (!eeprom_buff)
531 		return -ENOMEM;
532 
533 	/* align data to 16 bit boundaries, read the missing data from
534 	   the EEPROM */
535 	if (eeprom->offset & 1) {
536 		ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
537 				    &(eeprom_buff[0]));
538 		if (ret < 0) {
539 			netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
540 			goto free;
541 		}
542 	}
543 
544 	if ((eeprom->offset + eeprom->len) & 1) {
545 		ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
546 				    &(eeprom_buff[last_word - first_word]));
547 		if (ret < 0) {
548 			netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
549 			goto free;
550 		}
551 	}
552 
553 	memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);
554 
555 	/* write data to EEPROM */
556 	ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL);
557 	if (ret < 0) {
558 		netdev_err(net, "Failed to enable EEPROM write\n");
559 		goto free;
560 	}
561 	msleep(20);
562 
563 	for (i = first_word; i <= last_word; i++) {
564 		netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
565 			   i, eeprom_buff[i - first_word]);
566 		ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
567 				     eeprom_buff[i - first_word], 0, NULL);
568 		if (ret < 0) {
569 			netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
570 				   i);
571 			goto free;
572 		}
573 		msleep(20);
574 	}
575 
576 	ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL);
577 	if (ret < 0) {
578 		netdev_err(net, "Failed to disable EEPROM write\n");
579 		goto free;
580 	}
581 
582 	ret = 0;
583 free:
584 	kfree(eeprom_buff);
585 	return ret;
586 }
587 
asix_get_drvinfo(struct net_device * net,struct ethtool_drvinfo * info)588 void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
589 {
590 	/* Inherit standard device info */
591 	usbnet_get_drvinfo(net, info);
592 	strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
593 	strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
594 }
595 
asix_set_mac_address(struct net_device * net,void * p)596 int asix_set_mac_address(struct net_device *net, void *p)
597 {
598 	struct usbnet *dev = netdev_priv(net);
599 	struct asix_data *data = (struct asix_data *)&dev->data;
600 	struct sockaddr *addr = p;
601 
602 	if (netif_running(net))
603 		return -EBUSY;
604 	if (!is_valid_ether_addr(addr->sa_data))
605 		return -EADDRNOTAVAIL;
606 
607 	memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
608 
609 	/* We use the 20 byte dev->data
610 	 * for our 6 byte mac buffer
611 	 * to avoid allocating memory that
612 	 * is tricky to free later */
613 	memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
614 	asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
615 							data->mac_addr);
616 
617 	return 0;
618 }
619