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1/* CoreChip-sz SR9800 one chip USB 2.0 Ethernet Devices
2 *
3 * Author : Liu Junliang <liujunliang_ljl@163.com>
4 *
5 * Based on asix_common.c, asix_devices.c
6 *
7 * This file is licensed under the terms of the GNU General Public License
8 * version 2. This program is licensed "as is" without any warranty of any
9 * kind, whether express or implied.*
10 */
11
12#include <linux/module.h>
13#include <linux/kmod.h>
14#include <linux/init.h>
15#include <linux/netdevice.h>
16#include <linux/etherdevice.h>
17#include <linux/ethtool.h>
18#include <linux/workqueue.h>
19#include <linux/mii.h>
20#include <linux/usb.h>
21#include <linux/crc32.h>
22#include <linux/usb/usbnet.h>
23#include <linux/slab.h>
24#include <linux/if_vlan.h>
25
26#include "sr9800.h"
27
28static int sr_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
29 u16 size, void *data)
30{
31 int err;
32
33 err = usbnet_read_cmd(dev, cmd, SR_REQ_RD_REG, value, index,
34 data, size);
35 if ((err != size) && (err >= 0))
36 err = -EINVAL;
37
38 return err;
39}
40
41static int sr_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
42 u16 size, void *data)
43{
44 int err;
45
46 err = usbnet_write_cmd(dev, cmd, SR_REQ_WR_REG, value, index,
47 data, size);
48 if ((err != size) && (err >= 0))
49 err = -EINVAL;
50
51 return err;
52}
53
54static void
55sr_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
56 u16 size, void *data)
57{
58 usbnet_write_cmd_async(dev, cmd, SR_REQ_WR_REG, value, index, data,
59 size);
60}
61
62static int sr_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
63{
64 int offset = 0;
65
66 /* This check is no longer done by usbnet */
67 if (skb->len < dev->net->hard_header_len)
68 return 0;
69
70 while (offset + sizeof(u32) < skb->len) {
71 struct sk_buff *sr_skb;
72 u16 size;
73 u32 header = get_unaligned_le32(skb->data + offset);
74
75 offset += sizeof(u32);
76 /* get the packet length */
77 size = (u16) (header & 0x7ff);
78 if (size != ((~header >> 16) & 0x07ff)) {
79 netdev_err(dev->net, "%s : Bad Header Length\n",
80 __func__);
81 return 0;
82 }
83
84 if ((size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) ||
85 (size + offset > skb->len)) {
86 netdev_err(dev->net, "%s : Bad RX Length %d\n",
87 __func__, size);
88 return 0;
89 }
90 sr_skb = netdev_alloc_skb_ip_align(dev->net, size);
91 if (!sr_skb)
92 return 0;
93
94 skb_put(sr_skb, size);
95 memcpy(sr_skb->data, skb->data + offset, size);
96 usbnet_skb_return(dev, sr_skb);
97
98 offset += (size + 1) & 0xfffe;
99 }
100
101 if (skb->len != offset) {
102 netdev_err(dev->net, "%s : Bad SKB Length %d\n", __func__,
103 skb->len);
104 return 0;
105 }
106
107 return 1;
108}
109
110static struct sk_buff *sr_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
111 gfp_t flags)
112{
113 int headroom = skb_headroom(skb);
114 int tailroom = skb_tailroom(skb);
115 u32 padbytes = 0xffff0000;
116 u32 packet_len;
117 int padlen;
118
119 padlen = ((skb->len + 4) % (dev->maxpacket - 1)) ? 0 : 4;
120
121 if ((!skb_cloned(skb)) && ((headroom + tailroom) >= (4 + padlen))) {
122 if ((headroom < 4) || (tailroom < padlen)) {
123 skb->data = memmove(skb->head + 4, skb->data,
124 skb->len);
125 skb_set_tail_pointer(skb, skb->len);
126 }
127 } else {
128 struct sk_buff *skb2;
129 skb2 = skb_copy_expand(skb, 4, padlen, flags);
130 dev_kfree_skb_any(skb);
131 skb = skb2;
132 if (!skb)
133 return NULL;
134 }
135
136 skb_push(skb, 4);
137 packet_len = (((skb->len - 4) ^ 0x0000ffff) << 16) + (skb->len - 4);
138 cpu_to_le32s(&packet_len);
139 skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
140
141 if (padlen) {
142 cpu_to_le32s(&padbytes);
143 memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
144 skb_put(skb, sizeof(padbytes));
145 }
146
147 return skb;
148}
149
150static void sr_status(struct usbnet *dev, struct urb *urb)
151{
152 struct sr9800_int_data *event;
153 int link;
154
155 if (urb->actual_length < 8)
156 return;
157
158 event = urb->transfer_buffer;
159 link = event->link & 0x01;
160 if (netif_carrier_ok(dev->net) != link) {
161 usbnet_link_change(dev, link, 1);
162 netdev_dbg(dev->net, "Link Status is: %d\n", link);
163 }
164
165 return;
166}
167
168static inline int sr_set_sw_mii(struct usbnet *dev)
169{
170 int ret;
171
172 ret = sr_write_cmd(dev, SR_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
173 if (ret < 0)
174 netdev_err(dev->net, "Failed to enable software MII access\n");
175 return ret;
176}
177
178static inline int sr_set_hw_mii(struct usbnet *dev)
179{
180 int ret;
181
182 ret = sr_write_cmd(dev, SR_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
183 if (ret < 0)
184 netdev_err(dev->net, "Failed to enable hardware MII access\n");
185 return ret;
186}
187
188static inline int sr_get_phy_addr(struct usbnet *dev)
189{
190 u8 buf[2];
191 int ret;
192
193 ret = sr_read_cmd(dev, SR_CMD_READ_PHY_ID, 0, 0, 2, buf);
194 if (ret < 0) {
195 netdev_err(dev->net, "%s : Error reading PHYID register:%02x\n",
196 __func__, ret);
197 goto out;
198 }
199 netdev_dbg(dev->net, "%s : returning 0x%04x\n", __func__,
200 *((__le16 *)buf));
201
202 ret = buf[1];
203
204out:
205 return ret;
206}
207
208static int sr_sw_reset(struct usbnet *dev, u8 flags)
209{
210 int ret;
211
212 ret = sr_write_cmd(dev, SR_CMD_SW_RESET, flags, 0, 0, NULL);
213 if (ret < 0)
214 netdev_err(dev->net, "Failed to send software reset:%02x\n",
215 ret);
216
217 return ret;
218}
219
220static u16 sr_read_rx_ctl(struct usbnet *dev)
221{
222 __le16 v;
223 int ret;
224
225 ret = sr_read_cmd(dev, SR_CMD_READ_RX_CTL, 0, 0, 2, &v);
226 if (ret < 0) {
227 netdev_err(dev->net, "Error reading RX_CTL register:%02x\n",
228 ret);
229 goto out;
230 }
231
232 ret = le16_to_cpu(v);
233out:
234 return ret;
235}
236
237static int sr_write_rx_ctl(struct usbnet *dev, u16 mode)
238{
239 int ret;
240
241 netdev_dbg(dev->net, "%s : mode = 0x%04x\n", __func__, mode);
242 ret = sr_write_cmd(dev, SR_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
243 if (ret < 0)
244 netdev_err(dev->net,
245 "Failed to write RX_CTL mode to 0x%04x:%02x\n",
246 mode, ret);
247
248 return ret;
249}
250
251static u16 sr_read_medium_status(struct usbnet *dev)
252{
253 __le16 v;
254 int ret;
255
256 ret = sr_read_cmd(dev, SR_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
257 if (ret < 0) {
258 netdev_err(dev->net,
259 "Error reading Medium Status register:%02x\n", ret);
260 return ret; /* TODO: callers not checking for error ret */
261 }
262
263 return le16_to_cpu(v);
264}
265
266static int sr_write_medium_mode(struct usbnet *dev, u16 mode)
267{
268 int ret;
269
270 netdev_dbg(dev->net, "%s : mode = 0x%04x\n", __func__, mode);
271 ret = sr_write_cmd(dev, SR_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
272 if (ret < 0)
273 netdev_err(dev->net,
274 "Failed to write Medium Mode mode to 0x%04x:%02x\n",
275 mode, ret);
276 return ret;
277}
278
279static int sr_write_gpio(struct usbnet *dev, u16 value, int sleep)
280{
281 int ret;
282
283 netdev_dbg(dev->net, "%s : value = 0x%04x\n", __func__, value);
284 ret = sr_write_cmd(dev, SR_CMD_WRITE_GPIOS, value, 0, 0, NULL);
285 if (ret < 0)
286 netdev_err(dev->net, "Failed to write GPIO value 0x%04x:%02x\n",
287 value, ret);
288 if (sleep)
289 msleep(sleep);
290
291 return ret;
292}
293
294/* SR9800 have a 16-bit RX_CTL value */
295static void sr_set_multicast(struct net_device *net)
296{
297 struct usbnet *dev = netdev_priv(net);
298 struct sr_data *data = (struct sr_data *)&dev->data;
299 u16 rx_ctl = SR_DEFAULT_RX_CTL;
300
301 if (net->flags & IFF_PROMISC) {
302 rx_ctl |= SR_RX_CTL_PRO;
303 } else if (net->flags & IFF_ALLMULTI ||
304 netdev_mc_count(net) > SR_MAX_MCAST) {
305 rx_ctl |= SR_RX_CTL_AMALL;
306 } else if (netdev_mc_empty(net)) {
307 /* just broadcast and directed */
308 } else {
309 /* We use the 20 byte dev->data
310 * for our 8 byte filter buffer
311 * to avoid allocating memory that
312 * is tricky to free later
313 */
314 struct netdev_hw_addr *ha;
315 u32 crc_bits;
316
317 memset(data->multi_filter, 0, SR_MCAST_FILTER_SIZE);
318
319 /* Build the multicast hash filter. */
320 netdev_for_each_mc_addr(ha, net) {
321 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
322 data->multi_filter[crc_bits >> 3] |=
323 1 << (crc_bits & 7);
324 }
325
326 sr_write_cmd_async(dev, SR_CMD_WRITE_MULTI_FILTER, 0, 0,
327 SR_MCAST_FILTER_SIZE, data->multi_filter);
328
329 rx_ctl |= SR_RX_CTL_AM;
330 }
331
332 sr_write_cmd_async(dev, SR_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
333}
334
335static int sr_mdio_read(struct net_device *net, int phy_id, int loc)
336{
337 struct usbnet *dev = netdev_priv(net);
338 __le16 res;
339
340 mutex_lock(&dev->phy_mutex);
341 sr_set_sw_mii(dev);
342 sr_read_cmd(dev, SR_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, &res);
343 sr_set_hw_mii(dev);
344 mutex_unlock(&dev->phy_mutex);
345
346 netdev_dbg(dev->net,
347 "%s : phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", __func__,
348 phy_id, loc, le16_to_cpu(res));
349
350 return le16_to_cpu(res);
351}
352
353static void
354sr_mdio_write(struct net_device *net, int phy_id, int loc, int val)
355{
356 struct usbnet *dev = netdev_priv(net);
357 __le16 res = cpu_to_le16(val);
358
359 netdev_dbg(dev->net,
360 "%s : phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", __func__,
361 phy_id, loc, val);
362 mutex_lock(&dev->phy_mutex);
363 sr_set_sw_mii(dev);
364 sr_write_cmd(dev, SR_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
365 sr_set_hw_mii(dev);
366 mutex_unlock(&dev->phy_mutex);
367}
368
369/* Get the PHY Identifier from the PHYSID1 & PHYSID2 MII registers */
370static u32 sr_get_phyid(struct usbnet *dev)
371{
372 int phy_reg;
373 u32 phy_id;
374 int i;
375
376 /* Poll for the rare case the FW or phy isn't ready yet. */
377 for (i = 0; i < 100; i++) {
378 phy_reg = sr_mdio_read(dev->net, dev->mii.phy_id, MII_PHYSID1);
379 if (phy_reg != 0 && phy_reg != 0xFFFF)
380 break;
381 mdelay(1);
382 }
383
384 if (phy_reg <= 0 || phy_reg == 0xFFFF)
385 return 0;
386
387 phy_id = (phy_reg & 0xffff) << 16;
388
389 phy_reg = sr_mdio_read(dev->net, dev->mii.phy_id, MII_PHYSID2);
390 if (phy_reg < 0)
391 return 0;
392
393 phy_id |= (phy_reg & 0xffff);
394
395 return phy_id;
396}
397
398static void
399sr_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
400{
401 struct usbnet *dev = netdev_priv(net);
402 u8 opt;
403
404 if (sr_read_cmd(dev, SR_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
405 wolinfo->supported = 0;
406 wolinfo->wolopts = 0;
407 return;
408 }
409 wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
410 wolinfo->wolopts = 0;
411 if (opt & SR_MONITOR_LINK)
412 wolinfo->wolopts |= WAKE_PHY;
413 if (opt & SR_MONITOR_MAGIC)
414 wolinfo->wolopts |= WAKE_MAGIC;
415}
416
417static int
418sr_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
419{
420 struct usbnet *dev = netdev_priv(net);
421 u8 opt = 0;
422
423 if (wolinfo->wolopts & WAKE_PHY)
424 opt |= SR_MONITOR_LINK;
425 if (wolinfo->wolopts & WAKE_MAGIC)
426 opt |= SR_MONITOR_MAGIC;
427
428 if (sr_write_cmd(dev, SR_CMD_WRITE_MONITOR_MODE,
429 opt, 0, 0, NULL) < 0)
430 return -EINVAL;
431
432 return 0;
433}
434
435static int sr_get_eeprom_len(struct net_device *net)
436{
437 struct usbnet *dev = netdev_priv(net);
438 struct sr_data *data = (struct sr_data *)&dev->data;
439
440 return data->eeprom_len;
441}
442
443static int sr_get_eeprom(struct net_device *net,
444 struct ethtool_eeprom *eeprom, u8 *data)
445{
446 struct usbnet *dev = netdev_priv(net);
447 __le16 *ebuf = (__le16 *)data;
448 int ret;
449 int i;
450
451 /* Crude hack to ensure that we don't overwrite memory
452 * if an odd length is supplied
453 */
454 if (eeprom->len % 2)
455 return -EINVAL;
456
457 eeprom->magic = SR_EEPROM_MAGIC;
458
459 /* sr9800 returns 2 bytes from eeprom on read */
460 for (i = 0; i < eeprom->len / 2; i++) {
461 ret = sr_read_cmd(dev, SR_CMD_READ_EEPROM, eeprom->offset + i,
462 0, 2, &ebuf[i]);
463 if (ret < 0)
464 return -EINVAL;
465 }
466 return 0;
467}
468
469static void sr_get_drvinfo(struct net_device *net,
470 struct ethtool_drvinfo *info)
471{
472 struct usbnet *dev = netdev_priv(net);
473 struct sr_data *data = (struct sr_data *)&dev->data;
474
475 /* Inherit standard device info */
476 usbnet_get_drvinfo(net, info);
477 strncpy(info->driver, DRIVER_NAME, sizeof(info->driver));
478 strncpy(info->version, DRIVER_VERSION, sizeof(info->version));
479 info->eedump_len = data->eeprom_len;
480}
481
482static u32 sr_get_link(struct net_device *net)
483{
484 struct usbnet *dev = netdev_priv(net);
485
486 return mii_link_ok(&dev->mii);
487}
488
489static int sr_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
490{
491 struct usbnet *dev = netdev_priv(net);
492
493 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
494}
495
496static int sr_set_mac_address(struct net_device *net, void *p)
497{
498 struct usbnet *dev = netdev_priv(net);
499 struct sr_data *data = (struct sr_data *)&dev->data;
500 struct sockaddr *addr = p;
501
502 if (netif_running(net))
503 return -EBUSY;
504 if (!is_valid_ether_addr(addr->sa_data))
505 return -EADDRNOTAVAIL;
506
507 memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
508
509 /* We use the 20 byte dev->data
510 * for our 6 byte mac buffer
511 * to avoid allocating memory that
512 * is tricky to free later
513 */
514 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
515 sr_write_cmd_async(dev, SR_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
516 data->mac_addr);
517
518 return 0;
519}
520
521static const struct ethtool_ops sr9800_ethtool_ops = {
522 .get_drvinfo = sr_get_drvinfo,
523 .get_link = sr_get_link,
524 .get_msglevel = usbnet_get_msglevel,
525 .set_msglevel = usbnet_set_msglevel,
526 .get_wol = sr_get_wol,
527 .set_wol = sr_set_wol,
528 .get_eeprom_len = sr_get_eeprom_len,
529 .get_eeprom = sr_get_eeprom,
530 .get_settings = usbnet_get_settings,
531 .set_settings = usbnet_set_settings,
532 .nway_reset = usbnet_nway_reset,
533};
534
535static int sr9800_link_reset(struct usbnet *dev)
536{
537 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
538 u16 mode;
539
540 mii_check_media(&dev->mii, 1, 1);
541 mii_ethtool_gset(&dev->mii, &ecmd);
542 mode = SR9800_MEDIUM_DEFAULT;
543
544 if (ethtool_cmd_speed(&ecmd) != SPEED_100)
545 mode &= ~SR_MEDIUM_PS;
546
547 if (ecmd.duplex != DUPLEX_FULL)
548 mode &= ~SR_MEDIUM_FD;
549
550 netdev_dbg(dev->net, "%s : speed: %u duplex: %d mode: 0x%04x\n",
551 __func__, ethtool_cmd_speed(&ecmd), ecmd.duplex, mode);
552
553 sr_write_medium_mode(dev, mode);
554
555 return 0;
556}
557
558
559static int sr9800_set_default_mode(struct usbnet *dev)
560{
561 u16 rx_ctl;
562 int ret;
563
564 sr_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
565 sr_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
566 ADVERTISE_ALL | ADVERTISE_CSMA);
567 mii_nway_restart(&dev->mii);
568
569 ret = sr_write_medium_mode(dev, SR9800_MEDIUM_DEFAULT);
570 if (ret < 0)
571 goto out;
572
573 ret = sr_write_cmd(dev, SR_CMD_WRITE_IPG012,
574 SR9800_IPG0_DEFAULT | SR9800_IPG1_DEFAULT,
575 SR9800_IPG2_DEFAULT, 0, NULL);
576 if (ret < 0) {
577 netdev_dbg(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
578 goto out;
579 }
580
581 /* Set RX_CTL to default values with 2k buffer, and enable cactus */
582 ret = sr_write_rx_ctl(dev, SR_DEFAULT_RX_CTL);
583 if (ret < 0)
584 goto out;
585
586 rx_ctl = sr_read_rx_ctl(dev);
587 netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
588 rx_ctl);
589
590 rx_ctl = sr_read_medium_status(dev);
591 netdev_dbg(dev->net, "Medium Status:0x%04x after all initializations\n",
592 rx_ctl);
593
594 return 0;
595out:
596 return ret;
597}
598
599static int sr9800_reset(struct usbnet *dev)
600{
601 struct sr_data *data = (struct sr_data *)&dev->data;
602 int ret, embd_phy;
603 u16 rx_ctl;
604
605 ret = sr_write_gpio(dev,
606 SR_GPIO_RSE | SR_GPIO_GPO_2 | SR_GPIO_GPO2EN, 5);
607 if (ret < 0)
608 goto out;
609
610 embd_phy = ((sr_get_phy_addr(dev) & 0x1f) == 0x10 ? 1 : 0);
611
612 ret = sr_write_cmd(dev, SR_CMD_SW_PHY_SELECT, embd_phy, 0, 0, NULL);
613 if (ret < 0) {
614 netdev_dbg(dev->net, "Select PHY #1 failed: %d\n", ret);
615 goto out;
616 }
617
618 ret = sr_sw_reset(dev, SR_SWRESET_IPPD | SR_SWRESET_PRL);
619 if (ret < 0)
620 goto out;
621
622 msleep(150);
623
624 ret = sr_sw_reset(dev, SR_SWRESET_CLEAR);
625 if (ret < 0)
626 goto out;
627
628 msleep(150);
629
630 if (embd_phy) {
631 ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
632 if (ret < 0)
633 goto out;
634 } else {
635 ret = sr_sw_reset(dev, SR_SWRESET_PRTE);
636 if (ret < 0)
637 goto out;
638 }
639
640 msleep(150);
641 rx_ctl = sr_read_rx_ctl(dev);
642 netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
643 ret = sr_write_rx_ctl(dev, 0x0000);
644 if (ret < 0)
645 goto out;
646
647 rx_ctl = sr_read_rx_ctl(dev);
648 netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
649
650 ret = sr_sw_reset(dev, SR_SWRESET_PRL);
651 if (ret < 0)
652 goto out;
653
654 msleep(150);
655
656 ret = sr_sw_reset(dev, SR_SWRESET_IPRL | SR_SWRESET_PRL);
657 if (ret < 0)
658 goto out;
659
660 msleep(150);
661
662 ret = sr9800_set_default_mode(dev);
663 if (ret < 0)
664 goto out;
665
666 /* Rewrite MAC address */
667 memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
668 ret = sr_write_cmd(dev, SR_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
669 data->mac_addr);
670 if (ret < 0)
671 goto out;
672
673 return 0;
674
675out:
676 return ret;
677}
678
679static const struct net_device_ops sr9800_netdev_ops = {
680 .ndo_open = usbnet_open,
681 .ndo_stop = usbnet_stop,
682 .ndo_start_xmit = usbnet_start_xmit,
683 .ndo_tx_timeout = usbnet_tx_timeout,
684 .ndo_change_mtu = usbnet_change_mtu,
685 .ndo_set_mac_address = sr_set_mac_address,
686 .ndo_validate_addr = eth_validate_addr,
687 .ndo_do_ioctl = sr_ioctl,
688 .ndo_set_rx_mode = sr_set_multicast,
689};
690
691static int sr9800_phy_powerup(struct usbnet *dev)
692{
693 int ret;
694
695 /* set the embedded Ethernet PHY in power-down state */
696 ret = sr_sw_reset(dev, SR_SWRESET_IPPD | SR_SWRESET_IPRL);
697 if (ret < 0) {
698 netdev_err(dev->net, "Failed to power down PHY : %d\n", ret);
699 return ret;
700 }
701 msleep(20);
702
703 /* set the embedded Ethernet PHY in power-up state */
704 ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
705 if (ret < 0) {
706 netdev_err(dev->net, "Failed to reset PHY: %d\n", ret);
707 return ret;
708 }
709 msleep(600);
710
711 /* set the embedded Ethernet PHY in reset state */
712 ret = sr_sw_reset(dev, SR_SWRESET_CLEAR);
713 if (ret < 0) {
714 netdev_err(dev->net, "Failed to power up PHY: %d\n", ret);
715 return ret;
716 }
717 msleep(20);
718
719 /* set the embedded Ethernet PHY in power-up state */
720 ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
721 if (ret < 0) {
722 netdev_err(dev->net, "Failed to reset PHY: %d\n", ret);
723 return ret;
724 }
725
726 return 0;
727}
728
729static int sr9800_bind(struct usbnet *dev, struct usb_interface *intf)
730{
731 struct sr_data *data = (struct sr_data *)&dev->data;
732 u16 led01_mux, led23_mux;
733 int ret, embd_phy;
734 u32 phyid;
735 u16 rx_ctl;
736
737 data->eeprom_len = SR9800_EEPROM_LEN;
738
739 usbnet_get_endpoints(dev, intf);
740
741 /* LED Setting Rule :
742 * AABB:CCDD
743 * AA : MFA0(LED0)
744 * BB : MFA1(LED1)
745 * CC : MFA2(LED2), Reserved for SR9800
746 * DD : MFA3(LED3), Reserved for SR9800
747 */
748 led01_mux = (SR_LED_MUX_LINK_ACTIVE << 8) | SR_LED_MUX_LINK;
749 led23_mux = (SR_LED_MUX_LINK_ACTIVE << 8) | SR_LED_MUX_TX_ACTIVE;
750 ret = sr_write_cmd(dev, SR_CMD_LED_MUX, led01_mux, led23_mux, 0, NULL);
751 if (ret < 0) {
752 netdev_err(dev->net, "set LINK LED failed : %d\n", ret);
753 goto out;
754 }
755
756 /* Get the MAC address */
757 ret = sr_read_cmd(dev, SR_CMD_READ_NODE_ID, 0, 0, ETH_ALEN,
758 dev->net->dev_addr);
759 if (ret < 0) {
760 netdev_dbg(dev->net, "Failed to read MAC address: %d\n", ret);
761 return ret;
762 }
763 netdev_dbg(dev->net, "mac addr : %pM\n", dev->net->dev_addr);
764
765 /* Initialize MII structure */
766 dev->mii.dev = dev->net;
767 dev->mii.mdio_read = sr_mdio_read;
768 dev->mii.mdio_write = sr_mdio_write;
769 dev->mii.phy_id_mask = 0x1f;
770 dev->mii.reg_num_mask = 0x1f;
771 dev->mii.phy_id = sr_get_phy_addr(dev);
772
773 dev->net->netdev_ops = &sr9800_netdev_ops;
774 dev->net->ethtool_ops = &sr9800_ethtool_ops;
775
776 embd_phy = ((dev->mii.phy_id & 0x1f) == 0x10 ? 1 : 0);
777 /* Reset the PHY to normal operation mode */
778 ret = sr_write_cmd(dev, SR_CMD_SW_PHY_SELECT, embd_phy, 0, 0, NULL);
779 if (ret < 0) {
780 netdev_dbg(dev->net, "Select PHY #1 failed: %d\n", ret);
781 return ret;
782 }
783
784 /* Init PHY routine */
785 ret = sr9800_phy_powerup(dev);
786 if (ret < 0)
787 goto out;
788
789 rx_ctl = sr_read_rx_ctl(dev);
790 netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
791 ret = sr_write_rx_ctl(dev, 0x0000);
792 if (ret < 0)
793 goto out;
794
795 rx_ctl = sr_read_rx_ctl(dev);
796 netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
797
798 /* Read PHYID register *AFTER* the PHY was reset properly */
799 phyid = sr_get_phyid(dev);
800 netdev_dbg(dev->net, "PHYID=0x%08x\n", phyid);
801
802 /* medium mode setting */
803 ret = sr9800_set_default_mode(dev);
804 if (ret < 0)
805 goto out;
806
807 if (dev->udev->speed == USB_SPEED_HIGH) {
808 ret = sr_write_cmd(dev, SR_CMD_BULKIN_SIZE,
809 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].byte_cnt,
810 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].threshold,
811 0, NULL);
812 if (ret < 0) {
813 netdev_err(dev->net, "Reset RX_CTL failed: %d\n", ret);
814 goto out;
815 }
816 dev->rx_urb_size =
817 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].size;
818 } else {
819 ret = sr_write_cmd(dev, SR_CMD_BULKIN_SIZE,
820 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].byte_cnt,
821 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].threshold,
822 0, NULL);
823 if (ret < 0) {
824 netdev_err(dev->net, "Reset RX_CTL failed: %d\n", ret);
825 goto out;
826 }
827 dev->rx_urb_size =
828 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].size;
829 }
830 netdev_dbg(dev->net, "%s : setting rx_urb_size with : %zu\n", __func__,
831 dev->rx_urb_size);
832 return 0;
833
834out:
835 return ret;
836}
837
838static const struct driver_info sr9800_driver_info = {
839 .description = "CoreChip SR9800 USB 2.0 Ethernet",
840 .bind = sr9800_bind,
841 .status = sr_status,
842 .link_reset = sr9800_link_reset,
843 .reset = sr9800_reset,
844 .flags = DRIVER_FLAG,
845 .rx_fixup = sr_rx_fixup,
846 .tx_fixup = sr_tx_fixup,
847};
848
849static const struct usb_device_id products[] = {
850 {
851 USB_DEVICE(0x0fe6, 0x9800), /* SR9800 Device */
852 .driver_info = (unsigned long) &sr9800_driver_info,
853 },
854 {}, /* END */
855};
856
857MODULE_DEVICE_TABLE(usb, products);
858
859static struct usb_driver sr_driver = {
860 .name = DRIVER_NAME,
861 .id_table = products,
862 .probe = usbnet_probe,
863 .suspend = usbnet_suspend,
864 .resume = usbnet_resume,
865 .disconnect = usbnet_disconnect,
866 .supports_autosuspend = 1,
867};
868
869module_usb_driver(sr_driver);
870
871MODULE_AUTHOR("Liu Junliang <liujunliang_ljl@163.com");
872MODULE_VERSION(DRIVER_VERSION);
873MODULE_DESCRIPTION("SR9800 USB 2.0 USB2NET Dev : http://www.corechip-sz.com");
874MODULE_LICENSE("GPL");
1/* CoreChip-sz SR9800 one chip USB 2.0 Ethernet Devices
2 *
3 * Author : Liu Junliang <liujunliang_ljl@163.com>
4 *
5 * Based on asix_common.c, asix_devices.c
6 *
7 * This file is licensed under the terms of the GNU General Public License
8 * version 2. This program is licensed "as is" without any warranty of any
9 * kind, whether express or implied.*
10 */
11
12#include <linux/module.h>
13#include <linux/kmod.h>
14#include <linux/init.h>
15#include <linux/netdevice.h>
16#include <linux/etherdevice.h>
17#include <linux/ethtool.h>
18#include <linux/workqueue.h>
19#include <linux/mii.h>
20#include <linux/usb.h>
21#include <linux/crc32.h>
22#include <linux/usb/usbnet.h>
23#include <linux/slab.h>
24#include <linux/if_vlan.h>
25
26#include "sr9800.h"
27
28static int sr_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
29 u16 size, void *data)
30{
31 int err;
32
33 err = usbnet_read_cmd(dev, cmd, SR_REQ_RD_REG, value, index,
34 data, size);
35 if ((err != size) && (err >= 0))
36 err = -EINVAL;
37
38 return err;
39}
40
41static int sr_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
42 u16 size, void *data)
43{
44 int err;
45
46 err = usbnet_write_cmd(dev, cmd, SR_REQ_WR_REG, value, index,
47 data, size);
48 if ((err != size) && (err >= 0))
49 err = -EINVAL;
50
51 return err;
52}
53
54static void
55sr_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value, u16 index,
56 u16 size, void *data)
57{
58 usbnet_write_cmd_async(dev, cmd, SR_REQ_WR_REG, value, index, data,
59 size);
60}
61
62static int sr_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
63{
64 int offset = 0;
65
66 /* This check is no longer done by usbnet */
67 if (skb->len < dev->net->hard_header_len)
68 return 0;
69
70 while (offset + sizeof(u32) < skb->len) {
71 struct sk_buff *sr_skb;
72 u16 size;
73 u32 header = get_unaligned_le32(skb->data + offset);
74
75 offset += sizeof(u32);
76 /* get the packet length */
77 size = (u16) (header & 0x7ff);
78 if (size != ((~header >> 16) & 0x07ff)) {
79 netdev_err(dev->net, "%s : Bad Header Length\n",
80 __func__);
81 return 0;
82 }
83
84 if ((size > dev->net->mtu + ETH_HLEN + VLAN_HLEN) ||
85 (size + offset > skb->len)) {
86 netdev_err(dev->net, "%s : Bad RX Length %d\n",
87 __func__, size);
88 return 0;
89 }
90 sr_skb = netdev_alloc_skb_ip_align(dev->net, size);
91 if (!sr_skb)
92 return 0;
93
94 skb_put(sr_skb, size);
95 memcpy(sr_skb->data, skb->data + offset, size);
96 usbnet_skb_return(dev, sr_skb);
97
98 offset += (size + 1) & 0xfffe;
99 }
100
101 if (skb->len != offset) {
102 netdev_err(dev->net, "%s : Bad SKB Length %d\n", __func__,
103 skb->len);
104 return 0;
105 }
106
107 return 1;
108}
109
110static struct sk_buff *sr_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
111 gfp_t flags)
112{
113 int headroom = skb_headroom(skb);
114 int tailroom = skb_tailroom(skb);
115 u32 padbytes = 0xffff0000;
116 u32 packet_len;
117 int padlen;
118
119 padlen = ((skb->len + 4) % (dev->maxpacket - 1)) ? 0 : 4;
120
121 if ((!skb_cloned(skb)) && ((headroom + tailroom) >= (4 + padlen))) {
122 if ((headroom < 4) || (tailroom < padlen)) {
123 skb->data = memmove(skb->head + 4, skb->data,
124 skb->len);
125 skb_set_tail_pointer(skb, skb->len);
126 }
127 } else {
128 struct sk_buff *skb2;
129 skb2 = skb_copy_expand(skb, 4, padlen, flags);
130 dev_kfree_skb_any(skb);
131 skb = skb2;
132 if (!skb)
133 return NULL;
134 }
135
136 skb_push(skb, 4);
137 packet_len = (((skb->len - 4) ^ 0x0000ffff) << 16) + (skb->len - 4);
138 cpu_to_le32s(&packet_len);
139 skb_copy_to_linear_data(skb, &packet_len, sizeof(packet_len));
140
141 if (padlen) {
142 cpu_to_le32s(&padbytes);
143 memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
144 skb_put(skb, sizeof(padbytes));
145 }
146
147 usbnet_set_skb_tx_stats(skb, 1, 0);
148 return skb;
149}
150
151static void sr_status(struct usbnet *dev, struct urb *urb)
152{
153 struct sr9800_int_data *event;
154 int link;
155
156 if (urb->actual_length < 8)
157 return;
158
159 event = urb->transfer_buffer;
160 link = event->link & 0x01;
161 if (netif_carrier_ok(dev->net) != link) {
162 usbnet_link_change(dev, link, 1);
163 netdev_dbg(dev->net, "Link Status is: %d\n", link);
164 }
165
166 return;
167}
168
169static inline int sr_set_sw_mii(struct usbnet *dev)
170{
171 int ret;
172
173 ret = sr_write_cmd(dev, SR_CMD_SET_SW_MII, 0x0000, 0, 0, NULL);
174 if (ret < 0)
175 netdev_err(dev->net, "Failed to enable software MII access\n");
176 return ret;
177}
178
179static inline int sr_set_hw_mii(struct usbnet *dev)
180{
181 int ret;
182
183 ret = sr_write_cmd(dev, SR_CMD_SET_HW_MII, 0x0000, 0, 0, NULL);
184 if (ret < 0)
185 netdev_err(dev->net, "Failed to enable hardware MII access\n");
186 return ret;
187}
188
189static inline int sr_get_phy_addr(struct usbnet *dev)
190{
191 u8 buf[2];
192 int ret;
193
194 ret = sr_read_cmd(dev, SR_CMD_READ_PHY_ID, 0, 0, 2, buf);
195 if (ret < 0) {
196 netdev_err(dev->net, "%s : Error reading PHYID register:%02x\n",
197 __func__, ret);
198 goto out;
199 }
200 netdev_dbg(dev->net, "%s : returning 0x%04x\n", __func__,
201 *((__le16 *)buf));
202
203 ret = buf[1];
204
205out:
206 return ret;
207}
208
209static int sr_sw_reset(struct usbnet *dev, u8 flags)
210{
211 int ret;
212
213 ret = sr_write_cmd(dev, SR_CMD_SW_RESET, flags, 0, 0, NULL);
214 if (ret < 0)
215 netdev_err(dev->net, "Failed to send software reset:%02x\n",
216 ret);
217
218 return ret;
219}
220
221static u16 sr_read_rx_ctl(struct usbnet *dev)
222{
223 __le16 v;
224 int ret;
225
226 ret = sr_read_cmd(dev, SR_CMD_READ_RX_CTL, 0, 0, 2, &v);
227 if (ret < 0) {
228 netdev_err(dev->net, "Error reading RX_CTL register:%02x\n",
229 ret);
230 goto out;
231 }
232
233 ret = le16_to_cpu(v);
234out:
235 return ret;
236}
237
238static int sr_write_rx_ctl(struct usbnet *dev, u16 mode)
239{
240 int ret;
241
242 netdev_dbg(dev->net, "%s : mode = 0x%04x\n", __func__, mode);
243 ret = sr_write_cmd(dev, SR_CMD_WRITE_RX_CTL, mode, 0, 0, NULL);
244 if (ret < 0)
245 netdev_err(dev->net,
246 "Failed to write RX_CTL mode to 0x%04x:%02x\n",
247 mode, ret);
248
249 return ret;
250}
251
252static u16 sr_read_medium_status(struct usbnet *dev)
253{
254 __le16 v;
255 int ret;
256
257 ret = sr_read_cmd(dev, SR_CMD_READ_MEDIUM_STATUS, 0, 0, 2, &v);
258 if (ret < 0) {
259 netdev_err(dev->net,
260 "Error reading Medium Status register:%02x\n", ret);
261 return ret; /* TODO: callers not checking for error ret */
262 }
263
264 return le16_to_cpu(v);
265}
266
267static int sr_write_medium_mode(struct usbnet *dev, u16 mode)
268{
269 int ret;
270
271 netdev_dbg(dev->net, "%s : mode = 0x%04x\n", __func__, mode);
272 ret = sr_write_cmd(dev, SR_CMD_WRITE_MEDIUM_MODE, mode, 0, 0, NULL);
273 if (ret < 0)
274 netdev_err(dev->net,
275 "Failed to write Medium Mode mode to 0x%04x:%02x\n",
276 mode, ret);
277 return ret;
278}
279
280static int sr_write_gpio(struct usbnet *dev, u16 value, int sleep)
281{
282 int ret;
283
284 netdev_dbg(dev->net, "%s : value = 0x%04x\n", __func__, value);
285 ret = sr_write_cmd(dev, SR_CMD_WRITE_GPIOS, value, 0, 0, NULL);
286 if (ret < 0)
287 netdev_err(dev->net, "Failed to write GPIO value 0x%04x:%02x\n",
288 value, ret);
289 if (sleep)
290 msleep(sleep);
291
292 return ret;
293}
294
295/* SR9800 have a 16-bit RX_CTL value */
296static void sr_set_multicast(struct net_device *net)
297{
298 struct usbnet *dev = netdev_priv(net);
299 struct sr_data *data = (struct sr_data *)&dev->data;
300 u16 rx_ctl = SR_DEFAULT_RX_CTL;
301
302 if (net->flags & IFF_PROMISC) {
303 rx_ctl |= SR_RX_CTL_PRO;
304 } else if (net->flags & IFF_ALLMULTI ||
305 netdev_mc_count(net) > SR_MAX_MCAST) {
306 rx_ctl |= SR_RX_CTL_AMALL;
307 } else if (netdev_mc_empty(net)) {
308 /* just broadcast and directed */
309 } else {
310 /* We use the 20 byte dev->data
311 * for our 8 byte filter buffer
312 * to avoid allocating memory that
313 * is tricky to free later
314 */
315 struct netdev_hw_addr *ha;
316 u32 crc_bits;
317
318 memset(data->multi_filter, 0, SR_MCAST_FILTER_SIZE);
319
320 /* Build the multicast hash filter. */
321 netdev_for_each_mc_addr(ha, net) {
322 crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
323 data->multi_filter[crc_bits >> 3] |=
324 1 << (crc_bits & 7);
325 }
326
327 sr_write_cmd_async(dev, SR_CMD_WRITE_MULTI_FILTER, 0, 0,
328 SR_MCAST_FILTER_SIZE, data->multi_filter);
329
330 rx_ctl |= SR_RX_CTL_AM;
331 }
332
333 sr_write_cmd_async(dev, SR_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
334}
335
336static int sr_mdio_read(struct net_device *net, int phy_id, int loc)
337{
338 struct usbnet *dev = netdev_priv(net);
339 __le16 res;
340
341 mutex_lock(&dev->phy_mutex);
342 sr_set_sw_mii(dev);
343 sr_read_cmd(dev, SR_CMD_READ_MII_REG, phy_id, (__u16)loc, 2, &res);
344 sr_set_hw_mii(dev);
345 mutex_unlock(&dev->phy_mutex);
346
347 netdev_dbg(dev->net,
348 "%s : phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n", __func__,
349 phy_id, loc, le16_to_cpu(res));
350
351 return le16_to_cpu(res);
352}
353
354static void
355sr_mdio_write(struct net_device *net, int phy_id, int loc, int val)
356{
357 struct usbnet *dev = netdev_priv(net);
358 __le16 res = cpu_to_le16(val);
359
360 netdev_dbg(dev->net,
361 "%s : phy_id=0x%02x, loc=0x%02x, val=0x%04x\n", __func__,
362 phy_id, loc, val);
363 mutex_lock(&dev->phy_mutex);
364 sr_set_sw_mii(dev);
365 sr_write_cmd(dev, SR_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2, &res);
366 sr_set_hw_mii(dev);
367 mutex_unlock(&dev->phy_mutex);
368}
369
370/* Get the PHY Identifier from the PHYSID1 & PHYSID2 MII registers */
371static u32 sr_get_phyid(struct usbnet *dev)
372{
373 int phy_reg;
374 u32 phy_id;
375 int i;
376
377 /* Poll for the rare case the FW or phy isn't ready yet. */
378 for (i = 0; i < 100; i++) {
379 phy_reg = sr_mdio_read(dev->net, dev->mii.phy_id, MII_PHYSID1);
380 if (phy_reg != 0 && phy_reg != 0xFFFF)
381 break;
382 mdelay(1);
383 }
384
385 if (phy_reg <= 0 || phy_reg == 0xFFFF)
386 return 0;
387
388 phy_id = (phy_reg & 0xffff) << 16;
389
390 phy_reg = sr_mdio_read(dev->net, dev->mii.phy_id, MII_PHYSID2);
391 if (phy_reg < 0)
392 return 0;
393
394 phy_id |= (phy_reg & 0xffff);
395
396 return phy_id;
397}
398
399static void
400sr_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
401{
402 struct usbnet *dev = netdev_priv(net);
403 u8 opt;
404
405 if (sr_read_cmd(dev, SR_CMD_READ_MONITOR_MODE, 0, 0, 1, &opt) < 0) {
406 wolinfo->supported = 0;
407 wolinfo->wolopts = 0;
408 return;
409 }
410 wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
411 wolinfo->wolopts = 0;
412 if (opt & SR_MONITOR_LINK)
413 wolinfo->wolopts |= WAKE_PHY;
414 if (opt & SR_MONITOR_MAGIC)
415 wolinfo->wolopts |= WAKE_MAGIC;
416}
417
418static int
419sr_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
420{
421 struct usbnet *dev = netdev_priv(net);
422 u8 opt = 0;
423
424 if (wolinfo->wolopts & WAKE_PHY)
425 opt |= SR_MONITOR_LINK;
426 if (wolinfo->wolopts & WAKE_MAGIC)
427 opt |= SR_MONITOR_MAGIC;
428
429 if (sr_write_cmd(dev, SR_CMD_WRITE_MONITOR_MODE,
430 opt, 0, 0, NULL) < 0)
431 return -EINVAL;
432
433 return 0;
434}
435
436static int sr_get_eeprom_len(struct net_device *net)
437{
438 struct usbnet *dev = netdev_priv(net);
439 struct sr_data *data = (struct sr_data *)&dev->data;
440
441 return data->eeprom_len;
442}
443
444static int sr_get_eeprom(struct net_device *net,
445 struct ethtool_eeprom *eeprom, u8 *data)
446{
447 struct usbnet *dev = netdev_priv(net);
448 __le16 *ebuf = (__le16 *)data;
449 int ret;
450 int i;
451
452 /* Crude hack to ensure that we don't overwrite memory
453 * if an odd length is supplied
454 */
455 if (eeprom->len % 2)
456 return -EINVAL;
457
458 eeprom->magic = SR_EEPROM_MAGIC;
459
460 /* sr9800 returns 2 bytes from eeprom on read */
461 for (i = 0; i < eeprom->len / 2; i++) {
462 ret = sr_read_cmd(dev, SR_CMD_READ_EEPROM, eeprom->offset + i,
463 0, 2, &ebuf[i]);
464 if (ret < 0)
465 return -EINVAL;
466 }
467 return 0;
468}
469
470static void sr_get_drvinfo(struct net_device *net,
471 struct ethtool_drvinfo *info)
472{
473 /* Inherit standard device info */
474 usbnet_get_drvinfo(net, info);
475 strncpy(info->driver, DRIVER_NAME, sizeof(info->driver));
476 strncpy(info->version, DRIVER_VERSION, sizeof(info->version));
477}
478
479static u32 sr_get_link(struct net_device *net)
480{
481 struct usbnet *dev = netdev_priv(net);
482
483 return mii_link_ok(&dev->mii);
484}
485
486static int sr_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
487{
488 struct usbnet *dev = netdev_priv(net);
489
490 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
491}
492
493static int sr_set_mac_address(struct net_device *net, void *p)
494{
495 struct usbnet *dev = netdev_priv(net);
496 struct sr_data *data = (struct sr_data *)&dev->data;
497 struct sockaddr *addr = p;
498
499 if (netif_running(net))
500 return -EBUSY;
501 if (!is_valid_ether_addr(addr->sa_data))
502 return -EADDRNOTAVAIL;
503
504 memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
505
506 /* We use the 20 byte dev->data
507 * for our 6 byte mac buffer
508 * to avoid allocating memory that
509 * is tricky to free later
510 */
511 memcpy(data->mac_addr, addr->sa_data, ETH_ALEN);
512 sr_write_cmd_async(dev, SR_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
513 data->mac_addr);
514
515 return 0;
516}
517
518static const struct ethtool_ops sr9800_ethtool_ops = {
519 .get_drvinfo = sr_get_drvinfo,
520 .get_link = sr_get_link,
521 .get_msglevel = usbnet_get_msglevel,
522 .set_msglevel = usbnet_set_msglevel,
523 .get_wol = sr_get_wol,
524 .set_wol = sr_set_wol,
525 .get_eeprom_len = sr_get_eeprom_len,
526 .get_eeprom = sr_get_eeprom,
527 .nway_reset = usbnet_nway_reset,
528 .get_link_ksettings = usbnet_get_link_ksettings,
529 .set_link_ksettings = usbnet_set_link_ksettings,
530};
531
532static int sr9800_link_reset(struct usbnet *dev)
533{
534 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
535 u16 mode;
536
537 mii_check_media(&dev->mii, 1, 1);
538 mii_ethtool_gset(&dev->mii, &ecmd);
539 mode = SR9800_MEDIUM_DEFAULT;
540
541 if (ethtool_cmd_speed(&ecmd) != SPEED_100)
542 mode &= ~SR_MEDIUM_PS;
543
544 if (ecmd.duplex != DUPLEX_FULL)
545 mode &= ~SR_MEDIUM_FD;
546
547 netdev_dbg(dev->net, "%s : speed: %u duplex: %d mode: 0x%04x\n",
548 __func__, ethtool_cmd_speed(&ecmd), ecmd.duplex, mode);
549
550 sr_write_medium_mode(dev, mode);
551
552 return 0;
553}
554
555
556static int sr9800_set_default_mode(struct usbnet *dev)
557{
558 u16 rx_ctl;
559 int ret;
560
561 sr_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
562 sr_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
563 ADVERTISE_ALL | ADVERTISE_CSMA);
564 mii_nway_restart(&dev->mii);
565
566 ret = sr_write_medium_mode(dev, SR9800_MEDIUM_DEFAULT);
567 if (ret < 0)
568 goto out;
569
570 ret = sr_write_cmd(dev, SR_CMD_WRITE_IPG012,
571 SR9800_IPG0_DEFAULT | SR9800_IPG1_DEFAULT,
572 SR9800_IPG2_DEFAULT, 0, NULL);
573 if (ret < 0) {
574 netdev_dbg(dev->net, "Write IPG,IPG1,IPG2 failed: %d\n", ret);
575 goto out;
576 }
577
578 /* Set RX_CTL to default values with 2k buffer, and enable cactus */
579 ret = sr_write_rx_ctl(dev, SR_DEFAULT_RX_CTL);
580 if (ret < 0)
581 goto out;
582
583 rx_ctl = sr_read_rx_ctl(dev);
584 netdev_dbg(dev->net, "RX_CTL is 0x%04x after all initializations\n",
585 rx_ctl);
586
587 rx_ctl = sr_read_medium_status(dev);
588 netdev_dbg(dev->net, "Medium Status:0x%04x after all initializations\n",
589 rx_ctl);
590
591 return 0;
592out:
593 return ret;
594}
595
596static int sr9800_reset(struct usbnet *dev)
597{
598 struct sr_data *data = (struct sr_data *)&dev->data;
599 int ret, embd_phy;
600 u16 rx_ctl;
601
602 ret = sr_write_gpio(dev,
603 SR_GPIO_RSE | SR_GPIO_GPO_2 | SR_GPIO_GPO2EN, 5);
604 if (ret < 0)
605 goto out;
606
607 embd_phy = ((sr_get_phy_addr(dev) & 0x1f) == 0x10 ? 1 : 0);
608
609 ret = sr_write_cmd(dev, SR_CMD_SW_PHY_SELECT, embd_phy, 0, 0, NULL);
610 if (ret < 0) {
611 netdev_dbg(dev->net, "Select PHY #1 failed: %d\n", ret);
612 goto out;
613 }
614
615 ret = sr_sw_reset(dev, SR_SWRESET_IPPD | SR_SWRESET_PRL);
616 if (ret < 0)
617 goto out;
618
619 msleep(150);
620
621 ret = sr_sw_reset(dev, SR_SWRESET_CLEAR);
622 if (ret < 0)
623 goto out;
624
625 msleep(150);
626
627 if (embd_phy) {
628 ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
629 if (ret < 0)
630 goto out;
631 } else {
632 ret = sr_sw_reset(dev, SR_SWRESET_PRTE);
633 if (ret < 0)
634 goto out;
635 }
636
637 msleep(150);
638 rx_ctl = sr_read_rx_ctl(dev);
639 netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
640 ret = sr_write_rx_ctl(dev, 0x0000);
641 if (ret < 0)
642 goto out;
643
644 rx_ctl = sr_read_rx_ctl(dev);
645 netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
646
647 ret = sr_sw_reset(dev, SR_SWRESET_PRL);
648 if (ret < 0)
649 goto out;
650
651 msleep(150);
652
653 ret = sr_sw_reset(dev, SR_SWRESET_IPRL | SR_SWRESET_PRL);
654 if (ret < 0)
655 goto out;
656
657 msleep(150);
658
659 ret = sr9800_set_default_mode(dev);
660 if (ret < 0)
661 goto out;
662
663 /* Rewrite MAC address */
664 memcpy(data->mac_addr, dev->net->dev_addr, ETH_ALEN);
665 ret = sr_write_cmd(dev, SR_CMD_WRITE_NODE_ID, 0, 0, ETH_ALEN,
666 data->mac_addr);
667 if (ret < 0)
668 goto out;
669
670 return 0;
671
672out:
673 return ret;
674}
675
676static const struct net_device_ops sr9800_netdev_ops = {
677 .ndo_open = usbnet_open,
678 .ndo_stop = usbnet_stop,
679 .ndo_start_xmit = usbnet_start_xmit,
680 .ndo_tx_timeout = usbnet_tx_timeout,
681 .ndo_change_mtu = usbnet_change_mtu,
682 .ndo_get_stats64 = usbnet_get_stats64,
683 .ndo_set_mac_address = sr_set_mac_address,
684 .ndo_validate_addr = eth_validate_addr,
685 .ndo_do_ioctl = sr_ioctl,
686 .ndo_set_rx_mode = sr_set_multicast,
687};
688
689static int sr9800_phy_powerup(struct usbnet *dev)
690{
691 int ret;
692
693 /* set the embedded Ethernet PHY in power-down state */
694 ret = sr_sw_reset(dev, SR_SWRESET_IPPD | SR_SWRESET_IPRL);
695 if (ret < 0) {
696 netdev_err(dev->net, "Failed to power down PHY : %d\n", ret);
697 return ret;
698 }
699 msleep(20);
700
701 /* set the embedded Ethernet PHY in power-up state */
702 ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
703 if (ret < 0) {
704 netdev_err(dev->net, "Failed to reset PHY: %d\n", ret);
705 return ret;
706 }
707 msleep(600);
708
709 /* set the embedded Ethernet PHY in reset state */
710 ret = sr_sw_reset(dev, SR_SWRESET_CLEAR);
711 if (ret < 0) {
712 netdev_err(dev->net, "Failed to power up PHY: %d\n", ret);
713 return ret;
714 }
715 msleep(20);
716
717 /* set the embedded Ethernet PHY in power-up state */
718 ret = sr_sw_reset(dev, SR_SWRESET_IPRL);
719 if (ret < 0) {
720 netdev_err(dev->net, "Failed to reset PHY: %d\n", ret);
721 return ret;
722 }
723
724 return 0;
725}
726
727static int sr9800_bind(struct usbnet *dev, struct usb_interface *intf)
728{
729 struct sr_data *data = (struct sr_data *)&dev->data;
730 u16 led01_mux, led23_mux;
731 int ret, embd_phy;
732 u32 phyid;
733 u16 rx_ctl;
734
735 data->eeprom_len = SR9800_EEPROM_LEN;
736
737 usbnet_get_endpoints(dev, intf);
738
739 /* LED Setting Rule :
740 * AABB:CCDD
741 * AA : MFA0(LED0)
742 * BB : MFA1(LED1)
743 * CC : MFA2(LED2), Reserved for SR9800
744 * DD : MFA3(LED3), Reserved for SR9800
745 */
746 led01_mux = (SR_LED_MUX_LINK_ACTIVE << 8) | SR_LED_MUX_LINK;
747 led23_mux = (SR_LED_MUX_LINK_ACTIVE << 8) | SR_LED_MUX_TX_ACTIVE;
748 ret = sr_write_cmd(dev, SR_CMD_LED_MUX, led01_mux, led23_mux, 0, NULL);
749 if (ret < 0) {
750 netdev_err(dev->net, "set LINK LED failed : %d\n", ret);
751 goto out;
752 }
753
754 /* Get the MAC address */
755 ret = sr_read_cmd(dev, SR_CMD_READ_NODE_ID, 0, 0, ETH_ALEN,
756 dev->net->dev_addr);
757 if (ret < 0) {
758 netdev_dbg(dev->net, "Failed to read MAC address: %d\n", ret);
759 return ret;
760 }
761 netdev_dbg(dev->net, "mac addr : %pM\n", dev->net->dev_addr);
762
763 /* Initialize MII structure */
764 dev->mii.dev = dev->net;
765 dev->mii.mdio_read = sr_mdio_read;
766 dev->mii.mdio_write = sr_mdio_write;
767 dev->mii.phy_id_mask = 0x1f;
768 dev->mii.reg_num_mask = 0x1f;
769 dev->mii.phy_id = sr_get_phy_addr(dev);
770
771 dev->net->netdev_ops = &sr9800_netdev_ops;
772 dev->net->ethtool_ops = &sr9800_ethtool_ops;
773
774 embd_phy = ((dev->mii.phy_id & 0x1f) == 0x10 ? 1 : 0);
775 /* Reset the PHY to normal operation mode */
776 ret = sr_write_cmd(dev, SR_CMD_SW_PHY_SELECT, embd_phy, 0, 0, NULL);
777 if (ret < 0) {
778 netdev_dbg(dev->net, "Select PHY #1 failed: %d\n", ret);
779 return ret;
780 }
781
782 /* Init PHY routine */
783 ret = sr9800_phy_powerup(dev);
784 if (ret < 0)
785 goto out;
786
787 rx_ctl = sr_read_rx_ctl(dev);
788 netdev_dbg(dev->net, "RX_CTL is 0x%04x after software reset\n", rx_ctl);
789 ret = sr_write_rx_ctl(dev, 0x0000);
790 if (ret < 0)
791 goto out;
792
793 rx_ctl = sr_read_rx_ctl(dev);
794 netdev_dbg(dev->net, "RX_CTL is 0x%04x setting to 0x0000\n", rx_ctl);
795
796 /* Read PHYID register *AFTER* the PHY was reset properly */
797 phyid = sr_get_phyid(dev);
798 netdev_dbg(dev->net, "PHYID=0x%08x\n", phyid);
799
800 /* medium mode setting */
801 ret = sr9800_set_default_mode(dev);
802 if (ret < 0)
803 goto out;
804
805 if (dev->udev->speed == USB_SPEED_HIGH) {
806 ret = sr_write_cmd(dev, SR_CMD_BULKIN_SIZE,
807 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].byte_cnt,
808 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].threshold,
809 0, NULL);
810 if (ret < 0) {
811 netdev_err(dev->net, "Reset RX_CTL failed: %d\n", ret);
812 goto out;
813 }
814 dev->rx_urb_size =
815 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_4K].size;
816 } else {
817 ret = sr_write_cmd(dev, SR_CMD_BULKIN_SIZE,
818 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].byte_cnt,
819 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].threshold,
820 0, NULL);
821 if (ret < 0) {
822 netdev_err(dev->net, "Reset RX_CTL failed: %d\n", ret);
823 goto out;
824 }
825 dev->rx_urb_size =
826 SR9800_BULKIN_SIZE[SR9800_MAX_BULKIN_2K].size;
827 }
828 netdev_dbg(dev->net, "%s : setting rx_urb_size with : %zu\n", __func__,
829 dev->rx_urb_size);
830 return 0;
831
832out:
833 return ret;
834}
835
836static const struct driver_info sr9800_driver_info = {
837 .description = "CoreChip SR9800 USB 2.0 Ethernet",
838 .bind = sr9800_bind,
839 .status = sr_status,
840 .link_reset = sr9800_link_reset,
841 .reset = sr9800_reset,
842 .flags = DRIVER_FLAG,
843 .rx_fixup = sr_rx_fixup,
844 .tx_fixup = sr_tx_fixup,
845};
846
847static const struct usb_device_id products[] = {
848 {
849 USB_DEVICE(0x0fe6, 0x9800), /* SR9800 Device */
850 .driver_info = (unsigned long) &sr9800_driver_info,
851 },
852 {}, /* END */
853};
854
855MODULE_DEVICE_TABLE(usb, products);
856
857static struct usb_driver sr_driver = {
858 .name = DRIVER_NAME,
859 .id_table = products,
860 .probe = usbnet_probe,
861 .suspend = usbnet_suspend,
862 .resume = usbnet_resume,
863 .disconnect = usbnet_disconnect,
864 .supports_autosuspend = 1,
865};
866
867module_usb_driver(sr_driver);
868
869MODULE_AUTHOR("Liu Junliang <liujunliang_ljl@163.com");
870MODULE_VERSION(DRIVER_VERSION);
871MODULE_DESCRIPTION("SR9800 USB 2.0 USB2NET Dev : http://www.corechip-sz.com");
872MODULE_LICENSE("GPL");