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