Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/net/usb/sr9800.c

  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 
 28 static 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 
 41 static 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 
 54 static void
 55 sr_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 
 62 static 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 
110 static 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 
150 static 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 
168 static 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 
178 static 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 
188 static 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 
204 out:
205         return ret;
206 }
207 
208 static 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 
220 static 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);
233 out:
234         return ret;
235 }
236 
237 static 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 
251 static 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 
266 static 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 
279 static 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 */
295 static 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 
335 static 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 
353 static void
354 sr_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 */
370 static 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 
398 static void
399 sr_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 
417 static int
418 sr_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 
435 static 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 
443 static 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 
469 static 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 
482 static 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 
489 static 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 
496 static 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 
521 static 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 
535 static 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 
559 static 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;
595 out:
596         return ret;
597 }
598 
599 static 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 
675 out:
676         return ret;
677 }
678 
679 static 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 
691 static 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 
729 static 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 
834 out:
835         return ret;
836 }
837 
838 static 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 
849 static 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 
857 MODULE_DEVICE_TABLE(usb, products);
858 
859 static 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 
869 module_usb_driver(sr_driver);
870 
871 MODULE_AUTHOR("Liu Junliang <liujunliang_ljl@163.com");
872 MODULE_VERSION(DRIVER_VERSION);
873 MODULE_DESCRIPTION("SR9800 USB 2.0 USB2NET Dev : http://www.corechip-sz.com");
874 MODULE_LICENSE("GPL");
875 

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