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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ASIX AX8817X based USB 2.0 Ethernet Devices
4 * Copyright (C) 2003-2006 David Hollis <dhollis@davehollis.com>
5 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
6 * Copyright (C) 2006 James Painter <jamie.painter@iname.com>
7 * Copyright (c) 2002-2003 TiVo Inc.
8 */
9
10#include "asix.h"
11
12int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
13 u16 size, void *data, int in_pm)
14{
15 int ret;
16 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
17
18 BUG_ON(!dev);
19
20 if (!in_pm)
21 fn = usbnet_read_cmd;
22 else
23 fn = usbnet_read_cmd_nopm;
24
25 ret = fn(dev, cmd, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
26 value, index, data, size);
27
28 if (unlikely(ret < 0))
29 netdev_warn(dev->net, "Failed to read reg index 0x%04x: %d\n",
30 index, ret);
31
32 return ret;
33}
34
35int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
36 u16 size, void *data, int in_pm)
37{
38 int ret;
39 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
40
41 BUG_ON(!dev);
42
43 if (!in_pm)
44 fn = usbnet_write_cmd;
45 else
46 fn = usbnet_write_cmd_nopm;
47
48 ret = fn(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
49 value, index, data, size);
50
51 if (unlikely(ret < 0))
52 netdev_warn(dev->net, "Failed to write reg index 0x%04x: %d\n",
53 index, ret);
54
55 return ret;
56}
57
58void asix_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
59 u16 size, void *data)
60{
61 usbnet_write_cmd_async(dev, cmd,
62 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
63 value, index, data, size);
64}
65
66static int asix_check_host_enable(struct usbnet *dev, int in_pm)
67{
68 int i, ret;
69 u8 smsr;
70
71 for (i = 0; i < 30; ++i) {
72 ret = asix_set_sw_mii(dev, in_pm);
73 if (ret == -ENODEV || ret == -ETIMEDOUT)
74 break;
75 usleep_range(1000, 1100);
76 ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG,
77 0, 0, 1, &smsr, in_pm);
78 if (ret == -ENODEV)
79 break;
80 else if (ret < 0)
81 continue;
82 else if (smsr & AX_HOST_EN)
83 break;
84 }
85
86 return ret;
87}
88
89static void reset_asix_rx_fixup_info(struct asix_rx_fixup_info *rx)
90{
91 /* Reset the variables that have a lifetime outside of
92 * asix_rx_fixup_internal() so that future processing starts from a
93 * known set of initial conditions.
94 */
95
96 if (rx->ax_skb) {
97 /* Discard any incomplete Ethernet frame in the netdev buffer */
98 kfree_skb(rx->ax_skb);
99 rx->ax_skb = NULL;
100 }
101
102 /* Assume the Data header 32-bit word is at the start of the current
103 * or next URB socket buffer so reset all the state variables.
104 */
105 rx->remaining = 0;
106 rx->split_head = false;
107 rx->header = 0;
108}
109
110int asix_rx_fixup_internal(struct usbnet *dev, struct sk_buff *skb,
111 struct asix_rx_fixup_info *rx)
112{
113 int offset = 0;
114 u16 size;
115
116 /* When an Ethernet frame spans multiple URB socket buffers,
117 * do a sanity test for the Data header synchronisation.
118 * Attempt to detect the situation of the previous socket buffer having
119 * been truncated or a socket buffer was missing. These situations
120 * cause a discontinuity in the data stream and therefore need to avoid
121 * appending bad data to the end of the current netdev socket buffer.
122 * Also avoid unnecessarily discarding a good current netdev socket
123 * buffer.
124 */
125 if (rx->remaining && (rx->remaining + sizeof(u32) <= skb->len)) {
126 offset = ((rx->remaining + 1) & 0xfffe);
127 rx->header = get_unaligned_le32(skb->data + offset);
128 offset = 0;
129
130 size = (u16)(rx->header & 0x7ff);
131 if (size != ((~rx->header >> 16) & 0x7ff)) {
132 netdev_err(dev->net, "asix_rx_fixup() Data Header synchronisation was lost, remaining %d\n",
133 rx->remaining);
134 reset_asix_rx_fixup_info(rx);
135 }
136 }
137
138 while (offset + sizeof(u16) <= skb->len) {
139 u16 copy_length;
140
141 if (!rx->remaining) {
142 if (skb->len - offset == sizeof(u16)) {
143 rx->header = get_unaligned_le16(
144 skb->data + offset);
145 rx->split_head = true;
146 offset += sizeof(u16);
147 break;
148 }
149
150 if (rx->split_head == true) {
151 rx->header |= (get_unaligned_le16(
152 skb->data + offset) << 16);
153 rx->split_head = false;
154 offset += sizeof(u16);
155 } else {
156 rx->header = get_unaligned_le32(skb->data +
157 offset);
158 offset += sizeof(u32);
159 }
160
161 /* take frame length from Data header 32-bit word */
162 size = (u16)(rx->header & 0x7ff);
163 if (size != ((~rx->header >> 16) & 0x7ff)) {
164 netdev_err(dev->net, "asix_rx_fixup() Bad Header Length 0x%x, offset %d\n",
165 rx->header, offset);
166 reset_asix_rx_fixup_info(rx);
167 return 0;
168 }
169 if (size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) {
170 netdev_dbg(dev->net, "asix_rx_fixup() Bad RX Length %d\n",
171 size);
172 reset_asix_rx_fixup_info(rx);
173 return 0;
174 }
175
176 /* Sometimes may fail to get a netdev socket buffer but
177 * continue to process the URB socket buffer so that
178 * synchronisation of the Ethernet frame Data header
179 * word is maintained.
180 */
181 rx->ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
182
183 rx->remaining = size;
184 }
185
186 if (rx->remaining > skb->len - offset) {
187 copy_length = skb->len - offset;
188 rx->remaining -= copy_length;
189 } else {
190 copy_length = rx->remaining;
191 rx->remaining = 0;
192 }
193
194 if (rx->ax_skb) {
195 skb_put_data(rx->ax_skb, skb->data + offset,
196 copy_length);
197 if (!rx->remaining) {
198 usbnet_skb_return(dev, rx->ax_skb);
199 rx->ax_skb = NULL;
200 }
201 }
202
203 offset += (copy_length + 1) & 0xfffe;
204 }
205
206 if (skb->len != offset) {
207 netdev_err(dev->net, "asix_rx_fixup() Bad SKB Length %d, %d\n",
208 skb->len, offset);
209 reset_asix_rx_fixup_info(rx);
210 return 0;
211 }
212
213 return 1;
214}
215
216int asix_rx_fixup_common(struct usbnet *dev, struct sk_buff *skb)
217{
218 struct asix_common_private *dp = dev->driver_priv;
219 struct asix_rx_fixup_info *rx = &dp->rx_fixup_info;
220
221 return asix_rx_fixup_internal(dev, skb, rx);
222}
223
224void asix_rx_fixup_common_free(struct asix_common_private *dp)
225{
226 struct asix_rx_fixup_info *rx;
227
228 if (!dp)
229 return;
230
231 rx = &dp->rx_fixup_info;
232
233 if (rx->ax_skb) {
234 kfree_skb(rx->ax_skb);
235 rx->ax_skb = NULL;
236 }
237}
238
239struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
240 gfp_t flags)
241{
242 int padlen;
243 int headroom = skb_headroom(skb);
244 int tailroom = skb_tailroom(skb);
245 u32 packet_len;
246 u32 padbytes = 0xffff0000;
247 void *ptr;
248
249 padlen = ((skb->len + 4) & (dev->maxpacket - 1)) ? 0 : 4;
250
251 /* We need to push 4 bytes in front of frame (packet_len)
252 * and maybe add 4 bytes after the end (if padlen is 4)
253 *
254 * Avoid skb_copy_expand() expensive call, using following rules :
255 * - We are allowed to push 4 bytes in headroom if skb_header_cloned()
256 * is false (and if we have 4 bytes of headroom)
257 * - We are allowed to put 4 bytes at tail if skb_cloned()
258 * is false (and if we have 4 bytes of tailroom)
259 *
260 * TCP packets for example are cloned, but __skb_header_release()
261 * was called in tcp stack, allowing us to use headroom for our needs.
262 */
263 if (!skb_header_cloned(skb) &&
264 !(padlen && skb_cloned(skb)) &&
265 headroom + tailroom >= 4 + padlen) {
266 /* following should not happen, but better be safe */
267 if (headroom < 4 ||
268 tailroom < padlen) {
269 skb->data = memmove(skb->head + 4, skb->data, skb->len);
270 skb_set_tail_pointer(skb, skb->len);
271 }
272 } else {
273 struct sk_buff *skb2;
274
275 skb2 = skb_copy_expand(skb, 4, padlen, flags);
276 dev_kfree_skb_any(skb);
277 skb = skb2;
278 if (!skb)
279 return NULL;
280 }
281
282 packet_len = ((skb->len ^ 0x0000ffff) << 16) + skb->len;
283 ptr = skb_push(skb, 4);
284 put_unaligned_le32(packet_len, ptr);
285
286 if (padlen) {
287 put_unaligned_le32(padbytes, skb_tail_pointer(skb));
288 skb_put(skb, sizeof(padbytes));
289 }
290
291 usbnet_set_skb_tx_stats(skb, 1, 0);
292 return skb;
293}
294
295int asix_set_sw_mii(struct usbnet *dev, int in_pm)
296{
297 int ret;
298 ret = asix_write_cmd(dev, AX_CMD_SET_SW_MII, 0x0000, 0, 0, NULL, in_pm);
299
300 if (ret < 0)
301 netdev_err(dev->net, "Failed to enable software MII access\n");
302 return ret;
303}
304
305int asix_set_hw_mii(struct usbnet *dev, int in_pm)
306{
307 int ret;
308 ret = asix_write_cmd(dev, AX_CMD_SET_HW_MII, 0x0000, 0, 0, NULL, in_pm);
309 if (ret < 0)
310 netdev_err(dev->net, "Failed to enable hardware MII access\n");
311 return ret;
312}
313
314int asix_read_phy_addr(struct usbnet *dev, bool internal)
315{
316 int ret, offset;
317 u8 buf[2];
318
319 ret = asix_read_cmd(dev, AX_CMD_READ_PHY_ID, 0, 0, 2, buf, 0);
320 if (ret < 0)
321 goto error;
322
323 if (ret < 2) {
324 ret = -EIO;
325 goto error;
326 }
327
328 offset = (internal ? 1 : 0);
329 ret = buf[offset];
330
331 netdev_dbg(dev->net, "%s PHY address 0x%x\n",
332 internal ? "internal" : "external", ret);
333
334 return ret;
335
336error:
337 netdev_err(dev->net, "Error reading PHY_ID register: %02x\n", ret);
338
339 return ret;
340}
341
342int asix_sw_reset(struct usbnet *dev, u8 flags, int in_pm)
343{
344 int ret;
345
346 ret = asix_write_cmd(dev, AX_CMD_SW_RESET, flags, 0, 0, NULL, in_pm);
347 if (ret < 0)
348 netdev_err(dev->net, "Failed to send software reset: %02x\n", ret);
349
350 return ret;
351}
352
353u16 asix_read_rx_ctl(struct usbnet *dev, int in_pm)
354{
355 __le16 v;
356 int ret = asix_read_cmd(dev, AX_CMD_READ_RX_CTL, 0, 0, 2, &v, in_pm);
357
358 if (ret < 0) {
359 netdev_err(dev->net, "Error reading RX_CTL register: %02x\n", ret);
360 goto out;
361 }
362 ret = le16_to_cpu(v);
363out:
364 return ret;
365}
366
367int asix_write_rx_ctl(struct usbnet *dev, u16 mode, int in_pm)
368{
369 int ret;
370
371 netdev_dbg(dev->net, "asix_write_rx_ctl() - mode = 0x%04x\n", mode);
372 ret = asix_write_cmd(dev, AX_CMD_WRITE_RX_CTL, mode, 0, 0, NULL, in_pm);
373 if (ret < 0)
374 netdev_err(dev->net, "Failed to write RX_CTL mode to 0x%04x: %02x\n",
375 mode, ret);
376
377 return ret;
378}
379
380u16 asix_read_medium_status(struct usbnet *dev, int in_pm)
381{
382 __le16 v;
383 int ret = asix_read_cmd(dev, AX_CMD_READ_MEDIUM_STATUS,
384 0, 0, 2, &v, in_pm);
385
386 if (ret < 0) {
387 netdev_err(dev->net, "Error reading Medium Status register: %02x\n",
388 ret);
389 return ret; /* TODO: callers not checking for error ret */
390 }
391
392 return le16_to_cpu(v);
393
394}
395
396int asix_write_medium_mode(struct usbnet *dev, u16 mode, int in_pm)
397{
398 int ret;
399
400 netdev_dbg(dev->net, "asix_write_medium_mode() - mode = 0x%04x\n", mode);
401 ret = asix_write_cmd(dev, AX_CMD_WRITE_MEDIUM_MODE,
402 mode, 0, 0, NULL, in_pm);
403 if (ret < 0)
404 netdev_err(dev->net, "Failed to write Medium Mode mode to 0x%04x: %02x\n",
405 mode, ret);
406
407 return ret;
408}
409
410/* set MAC link settings according to information from phylib */
411void asix_adjust_link(struct net_device *netdev)
412{
413 struct phy_device *phydev = netdev->phydev;
414 struct usbnet *dev = netdev_priv(netdev);
415 u16 mode = 0;
416
417 if (phydev->link) {
418 mode = AX88772_MEDIUM_DEFAULT;
419
420 if (phydev->duplex == DUPLEX_HALF)
421 mode &= ~AX_MEDIUM_FD;
422
423 if (phydev->speed != SPEED_100)
424 mode &= ~AX_MEDIUM_PS;
425 }
426
427 asix_write_medium_mode(dev, mode, 0);
428 phy_print_status(phydev);
429}
430
431int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm)
432{
433 int ret;
434
435 netdev_dbg(dev->net, "asix_write_gpio() - value = 0x%04x\n", value);
436 ret = asix_write_cmd(dev, AX_CMD_WRITE_GPIOS, value, 0, 0, NULL, in_pm);
437 if (ret < 0)
438 netdev_err(dev->net, "Failed to write GPIO value 0x%04x: %02x\n",
439 value, ret);
440
441 if (sleep)
442 msleep(sleep);
443
444 return ret;
445}
446
447/*
448 * AX88772 & AX88178 have a 16-bit RX_CTL value
449 */
450void asix_set_multicast(struct net_device *net)
451{
452 struct usbnet *dev = netdev_priv(net);
453 struct asix_data *data = (struct asix_data *)&dev->data;
454 u16 rx_ctl = AX_DEFAULT_RX_CTL;
455
456 if (net->flags & IFF_PROMISC) {
457 rx_ctl |= AX_RX_CTL_PRO;
458 } else if (net->flags & IFF_ALLMULTI ||
459 netdev_mc_count(net) > AX_MAX_MCAST) {
460 rx_ctl |= AX_RX_CTL_AMALL;
461 } else if (netdev_mc_empty(net)) {
462 /* just broadcast and directed */
463 } else {
464 /* We use the 20 byte dev->data
465 * for our 8 byte filter buffer
466 * to avoid allocating memory that
467 * is tricky to free later */
468 struct netdev_hw_addr *ha;
469 u32 crc_bits;
470
471 memset(data->multi_filter, 0, AX_MCAST_FILTER_SIZE);
472
473 /* Build the multicast hash filter. */
474 netdev_for_each_mc_addr(ha, net) {
475 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
476 data->multi_filter[crc_bits >> 3] |=
477 1 << (crc_bits & 7);
478 }
479
480 asix_write_cmd_async(dev, AX_CMD_WRITE_MULTI_FILTER, 0, 0,
481 AX_MCAST_FILTER_SIZE, data->multi_filter);
482
483 rx_ctl |= AX_RX_CTL_AM;
484 }
485
486 asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
487}
488
489int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
490{
491 struct usbnet *dev = netdev_priv(netdev);
492 __le16 res;
493 int ret;
494
495 mutex_lock(&dev->phy_mutex);
496
497 ret = asix_check_host_enable(dev, 0);
498 if (ret == -ENODEV || ret == -ETIMEDOUT) {
499 mutex_unlock(&dev->phy_mutex);
500 return ret;
501 }
502
503 ret = asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2,
504 &res, 0);
505 if (ret < 0)
506 goto out;
507
508 ret = asix_set_hw_mii(dev, 0);
509out:
510 mutex_unlock(&dev->phy_mutex);
511
512 netdev_dbg(dev->net, "asix_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
513 phy_id, loc, le16_to_cpu(res));
514
515 return ret < 0 ? ret : le16_to_cpu(res);
516}
517
518static int __asix_mdio_write(struct net_device *netdev, int phy_id, int loc,
519 int val)
520{
521 struct usbnet *dev = netdev_priv(netdev);
522 __le16 res = cpu_to_le16(val);
523 int ret;
524
525 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
526 phy_id, loc, val);
527
528 mutex_lock(&dev->phy_mutex);
529
530 ret = asix_check_host_enable(dev, 0);
531 if (ret == -ENODEV)
532 goto out;
533
534 ret = asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2,
535 &res, 0);
536 if (ret < 0)
537 goto out;
538
539 ret = asix_set_hw_mii(dev, 0);
540out:
541 mutex_unlock(&dev->phy_mutex);
542
543 return ret < 0 ? ret : 0;
544}
545
546void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
547{
548 __asix_mdio_write(netdev, phy_id, loc, val);
549}
550
551/* MDIO read and write wrappers for phylib */
552int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum)
553{
554 struct usbnet *priv = bus->priv;
555
556 return asix_mdio_read(priv->net, phy_id, regnum);
557}
558
559int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val)
560{
561 struct usbnet *priv = bus->priv;
562
563 return __asix_mdio_write(priv->net, phy_id, regnum, val);
564}
565
566int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc)
567{
568 struct usbnet *dev = netdev_priv(netdev);
569 __le16 res;
570 int ret;
571
572 mutex_lock(&dev->phy_mutex);
573
574 ret = asix_check_host_enable(dev, 1);
575 if (ret == -ENODEV || ret == -ETIMEDOUT) {
576 mutex_unlock(&dev->phy_mutex);
577 return ret;
578 }
579
580 asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
581 (__u16)loc, 2, &res, 1);
582 asix_set_hw_mii(dev, 1);
583 mutex_unlock(&dev->phy_mutex);
584
585 netdev_dbg(dev->net, "asix_mdio_read_nopm() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
586 phy_id, loc, le16_to_cpu(res));
587
588 return le16_to_cpu(res);
589}
590
591void
592asix_mdio_write_nopm(struct net_device *netdev, int phy_id, int loc, int val)
593{
594 struct usbnet *dev = netdev_priv(netdev);
595 __le16 res = cpu_to_le16(val);
596 int ret;
597
598 netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
599 phy_id, loc, val);
600
601 mutex_lock(&dev->phy_mutex);
602
603 ret = asix_check_host_enable(dev, 1);
604 if (ret == -ENODEV) {
605 mutex_unlock(&dev->phy_mutex);
606 return;
607 }
608
609 asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id,
610 (__u16)loc, 2, &res, 1);
611 asix_set_hw_mii(dev, 1);
612 mutex_unlock(&dev->phy_mutex);
613}
614
615void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
616{
617 struct usbnet *dev = netdev_priv(net);
618 u8 opt;
619
620 if (asix_read_cmd(dev, AX_CMD_READ_MONITOR_MODE,
621 0, 0, 1, &opt, 0) < 0) {
622 wolinfo->supported = 0;
623 wolinfo->wolopts = 0;
624 return;
625 }
626 wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
627 wolinfo->wolopts = 0;
628 if (opt & AX_MONITOR_LINK)
629 wolinfo->wolopts |= WAKE_PHY;
630 if (opt & AX_MONITOR_MAGIC)
631 wolinfo->wolopts |= WAKE_MAGIC;
632}
633
634int asix_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
635{
636 struct usbnet *dev = netdev_priv(net);
637 u8 opt = 0;
638
639 if (wolinfo->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
640 return -EINVAL;
641
642 if (wolinfo->wolopts & WAKE_PHY)
643 opt |= AX_MONITOR_LINK;
644 if (wolinfo->wolopts & WAKE_MAGIC)
645 opt |= AX_MONITOR_MAGIC;
646
647 if (asix_write_cmd(dev, AX_CMD_WRITE_MONITOR_MODE,
648 opt, 0, 0, NULL, 0) < 0)
649 return -EINVAL;
650
651 return 0;
652}
653
654int asix_get_eeprom_len(struct net_device *net)
655{
656 return AX_EEPROM_LEN;
657}
658
659int asix_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
660 u8 *data)
661{
662 struct usbnet *dev = netdev_priv(net);
663 u16 *eeprom_buff;
664 int first_word, last_word;
665 int i;
666
667 if (eeprom->len == 0)
668 return -EINVAL;
669
670 eeprom->magic = AX_EEPROM_MAGIC;
671
672 first_word = eeprom->offset >> 1;
673 last_word = (eeprom->offset + eeprom->len - 1) >> 1;
674
675 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16),
676 GFP_KERNEL);
677 if (!eeprom_buff)
678 return -ENOMEM;
679
680 /* ax8817x returns 2 bytes from eeprom on read */
681 for (i = first_word; i <= last_word; i++) {
682 if (asix_read_cmd(dev, AX_CMD_READ_EEPROM, i, 0, 2,
683 &eeprom_buff[i - first_word], 0) < 0) {
684 kfree(eeprom_buff);
685 return -EIO;
686 }
687 }
688
689 memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
690 kfree(eeprom_buff);
691 return 0;
692}
693
694int asix_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
695 u8 *data)
696{
697 struct usbnet *dev = netdev_priv(net);
698 u16 *eeprom_buff;
699 int first_word, last_word;
700 int i;
701 int ret;
702
703 netdev_dbg(net, "write EEPROM len %d, offset %d, magic 0x%x\n",
704 eeprom->len, eeprom->offset, eeprom->magic);
705
706 if (eeprom->len == 0)
707 return -EINVAL;
708
709 if (eeprom->magic != AX_EEPROM_MAGIC)
710 return -EINVAL;
711
712 first_word = eeprom->offset >> 1;
713 last_word = (eeprom->offset + eeprom->len - 1) >> 1;
714
715 eeprom_buff = kmalloc_array(last_word - first_word + 1, sizeof(u16),
716 GFP_KERNEL);
717 if (!eeprom_buff)
718 return -ENOMEM;
719
720 /* align data to 16 bit boundaries, read the missing data from
721 the EEPROM */
722 if (eeprom->offset & 1) {
723 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, first_word, 0, 2,
724 &eeprom_buff[0], 0);
725 if (ret < 0) {
726 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", first_word);
727 goto free;
728 }
729 }
730
731 if ((eeprom->offset + eeprom->len) & 1) {
732 ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, last_word, 0, 2,
733 &eeprom_buff[last_word - first_word], 0);
734 if (ret < 0) {
735 netdev_err(net, "Failed to read EEPROM at offset 0x%02x.\n", last_word);
736 goto free;
737 }
738 }
739
740 memcpy((u8 *)eeprom_buff + (eeprom->offset & 1), data, eeprom->len);
741
742 /* write data to EEPROM */
743 ret = asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0x0000, 0, 0, NULL, 0);
744 if (ret < 0) {
745 netdev_err(net, "Failed to enable EEPROM write\n");
746 goto free;
747 }
748 msleep(20);
749
750 for (i = first_word; i <= last_word; i++) {
751 netdev_dbg(net, "write to EEPROM at offset 0x%02x, data 0x%04x\n",
752 i, eeprom_buff[i - first_word]);
753 ret = asix_write_cmd(dev, AX_CMD_WRITE_EEPROM, i,
754 eeprom_buff[i - first_word], 0, NULL, 0);
755 if (ret < 0) {
756 netdev_err(net, "Failed to write EEPROM at offset 0x%02x.\n",
757 i);
758 goto free;
759 }
760 msleep(20);
761 }
762
763 ret = asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0x0000, 0, 0, NULL, 0);
764 if (ret < 0) {
765 netdev_err(net, "Failed to disable EEPROM write\n");
766 goto free;
767 }
768
769 ret = 0;
770free:
771 kfree(eeprom_buff);
772 return ret;
773}
774
775void asix_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
776{
777 /* Inherit standard device info */
778 usbnet_get_drvinfo(net, info);
779 strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
780 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
781}
782
783int asix_set_mac_address(struct net_device *net, void *p)
784{
785 struct usbnet *dev = netdev_priv(net);
786 struct asix_data *data = (struct asix_data *)&dev->data;
787 struct sockaddr *addr = p;
788
789 if (netif_running(net))
790 return -EBUSY;
791 if (!is_valid_ether_addr(addr->sa_data))
792 return -EADDRNOTAVAIL;
793
794 memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
795
796 /* We use the 20 byte dev->data
797 * for our 6 byte mac buffer
798 * to avoid allocating memory that
799 * is tricky to free later */
800 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
801 asix_write_cmd_async(dev, AX_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
802 data->mac_addr);
803
804 return 0;
805}