Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

Linux/drivers/net/usb/smsc95xx.c

  1  /***************************************************************************
  2  *
  3  * Copyright (C) 2007-2008 SMSC
  4  *
  5  * This program is free software; you can redistribute it and/or
  6  * modify it under the terms of the GNU General Public License
  7  * as published by the Free Software Foundation; either version 2
  8  * of the License, or (at your option) any later version.
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
 17  *
 18  *****************************************************************************/
 19 
 20 #include <linux/module.h>
 21 #include <linux/kmod.h>
 22 #include <linux/netdevice.h>
 23 #include <linux/etherdevice.h>
 24 #include <linux/ethtool.h>
 25 #include <linux/mii.h>
 26 #include <linux/usb.h>
 27 #include <linux/bitrev.h>
 28 #include <linux/crc16.h>
 29 #include <linux/crc32.h>
 30 #include <linux/usb/usbnet.h>
 31 #include <linux/slab.h>
 32 #include <linux/of_net.h>
 33 #include "smsc95xx.h"
 34 
 35 #define SMSC_CHIPNAME                   "smsc95xx"
 36 #define SMSC_DRIVER_VERSION             "1.0.5"
 37 #define HS_USB_PKT_SIZE                 (512)
 38 #define FS_USB_PKT_SIZE                 (64)
 39 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
 40 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
 41 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
 42 #define MAX_SINGLE_PACKET_SIZE          (2048)
 43 #define LAN95XX_EEPROM_MAGIC            (0x9500)
 44 #define EEPROM_MAC_OFFSET               (0x01)
 45 #define DEFAULT_TX_CSUM_ENABLE          (true)
 46 #define DEFAULT_RX_CSUM_ENABLE          (true)
 47 #define SMSC95XX_INTERNAL_PHY_ID        (1)
 48 #define SMSC95XX_TX_OVERHEAD            (8)
 49 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
 50 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
 51                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
 52 
 53 #define FEATURE_8_WAKEUP_FILTERS        (0x01)
 54 #define FEATURE_PHY_NLP_CROSSOVER       (0x02)
 55 #define FEATURE_REMOTE_WAKEUP           (0x04)
 56 
 57 #define SUSPEND_SUSPEND0                (0x01)
 58 #define SUSPEND_SUSPEND1                (0x02)
 59 #define SUSPEND_SUSPEND2                (0x04)
 60 #define SUSPEND_SUSPEND3                (0x08)
 61 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
 62                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
 63 
 64 #define CARRIER_CHECK_DELAY (2 * HZ)
 65 
 66 struct smsc95xx_priv {
 67         u32 chip_id;
 68         u32 mac_cr;
 69         u32 hash_hi;
 70         u32 hash_lo;
 71         u32 wolopts;
 72         spinlock_t mac_cr_lock;
 73         u8 features;
 74         u8 suspend_flags;
 75         u8 mdix_ctrl;
 76         bool link_ok;
 77         struct delayed_work carrier_check;
 78         struct usbnet *dev;
 79 };
 80 
 81 static bool turbo_mode = true;
 82 module_param(turbo_mode, bool, 0644);
 83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
 84 
 85 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
 86                                             u32 *data, int in_pm)
 87 {
 88         u32 buf;
 89         int ret;
 90         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
 91 
 92         BUG_ON(!dev);
 93 
 94         if (!in_pm)
 95                 fn = usbnet_read_cmd;
 96         else
 97                 fn = usbnet_read_cmd_nopm;
 98 
 99         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
100                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
101                  0, index, &buf, 4);
102         if (unlikely(ret < 0)) {
103                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
104                             index, ret);
105                 return ret;
106         }
107 
108         le32_to_cpus(&buf);
109         *data = buf;
110 
111         return ret;
112 }
113 
114 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
115                                              u32 data, int in_pm)
116 {
117         u32 buf;
118         int ret;
119         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
120 
121         BUG_ON(!dev);
122 
123         if (!in_pm)
124                 fn = usbnet_write_cmd;
125         else
126                 fn = usbnet_write_cmd_nopm;
127 
128         buf = data;
129         cpu_to_le32s(&buf);
130 
131         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
132                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
133                  0, index, &buf, 4);
134         if (unlikely(ret < 0))
135                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
136                             index, ret);
137 
138         return ret;
139 }
140 
141 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
142                                                u32 *data)
143 {
144         return __smsc95xx_read_reg(dev, index, data, 1);
145 }
146 
147 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
148                                                 u32 data)
149 {
150         return __smsc95xx_write_reg(dev, index, data, 1);
151 }
152 
153 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
154                                           u32 *data)
155 {
156         return __smsc95xx_read_reg(dev, index, data, 0);
157 }
158 
159 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
160                                            u32 data)
161 {
162         return __smsc95xx_write_reg(dev, index, data, 0);
163 }
164 
165 /* Loop until the read is completed with timeout
166  * called with phy_mutex held */
167 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
168                                                      int in_pm)
169 {
170         unsigned long start_time = jiffies;
171         u32 val;
172         int ret;
173 
174         do {
175                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
176                 if (ret < 0) {
177                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
178                         return ret;
179                 }
180 
181                 if (!(val & MII_BUSY_))
182                         return 0;
183         } while (!time_after(jiffies, start_time + HZ));
184 
185         return -EIO;
186 }
187 
188 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
189                                 int in_pm)
190 {
191         struct usbnet *dev = netdev_priv(netdev);
192         u32 val, addr;
193         int ret;
194 
195         mutex_lock(&dev->phy_mutex);
196 
197         /* confirm MII not busy */
198         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
199         if (ret < 0) {
200                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
201                 goto done;
202         }
203 
204         /* set the address, index & direction (read from PHY) */
205         phy_id &= dev->mii.phy_id_mask;
206         idx &= dev->mii.reg_num_mask;
207         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
208         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
209         if (ret < 0) {
210                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
211                 goto done;
212         }
213 
214         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
215         if (ret < 0) {
216                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
217                 goto done;
218         }
219 
220         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
221         if (ret < 0) {
222                 netdev_warn(dev->net, "Error reading MII_DATA\n");
223                 goto done;
224         }
225 
226         ret = (u16)(val & 0xFFFF);
227 
228 done:
229         mutex_unlock(&dev->phy_mutex);
230         return ret;
231 }
232 
233 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
234                                   int idx, int regval, int in_pm)
235 {
236         struct usbnet *dev = netdev_priv(netdev);
237         u32 val, addr;
238         int ret;
239 
240         mutex_lock(&dev->phy_mutex);
241 
242         /* confirm MII not busy */
243         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
244         if (ret < 0) {
245                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
246                 goto done;
247         }
248 
249         val = regval;
250         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
251         if (ret < 0) {
252                 netdev_warn(dev->net, "Error writing MII_DATA\n");
253                 goto done;
254         }
255 
256         /* set the address, index & direction (write to PHY) */
257         phy_id &= dev->mii.phy_id_mask;
258         idx &= dev->mii.reg_num_mask;
259         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
260         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
261         if (ret < 0) {
262                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
263                 goto done;
264         }
265 
266         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
267         if (ret < 0) {
268                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
269                 goto done;
270         }
271 
272 done:
273         mutex_unlock(&dev->phy_mutex);
274 }
275 
276 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
277                                    int idx)
278 {
279         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
280 }
281 
282 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
283                                      int idx, int regval)
284 {
285         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
286 }
287 
288 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
289 {
290         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
291 }
292 
293 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
294                                 int regval)
295 {
296         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
297 }
298 
299 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
300 {
301         unsigned long start_time = jiffies;
302         u32 val;
303         int ret;
304 
305         do {
306                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
307                 if (ret < 0) {
308                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
309                         return ret;
310                 }
311 
312                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
313                         break;
314                 udelay(40);
315         } while (!time_after(jiffies, start_time + HZ));
316 
317         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
318                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
319                 return -EIO;
320         }
321 
322         return 0;
323 }
324 
325 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
326 {
327         unsigned long start_time = jiffies;
328         u32 val;
329         int ret;
330 
331         do {
332                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
333                 if (ret < 0) {
334                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
335                         return ret;
336                 }
337 
338                 if (!(val & E2P_CMD_BUSY_))
339                         return 0;
340 
341                 udelay(40);
342         } while (!time_after(jiffies, start_time + HZ));
343 
344         netdev_warn(dev->net, "EEPROM is busy\n");
345         return -EIO;
346 }
347 
348 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
349                                 u8 *data)
350 {
351         u32 val;
352         int i, ret;
353 
354         BUG_ON(!dev);
355         BUG_ON(!data);
356 
357         ret = smsc95xx_eeprom_confirm_not_busy(dev);
358         if (ret)
359                 return ret;
360 
361         for (i = 0; i < length; i++) {
362                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
363                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
364                 if (ret < 0) {
365                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
366                         return ret;
367                 }
368 
369                 ret = smsc95xx_wait_eeprom(dev);
370                 if (ret < 0)
371                         return ret;
372 
373                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
374                 if (ret < 0) {
375                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
376                         return ret;
377                 }
378 
379                 data[i] = val & 0xFF;
380                 offset++;
381         }
382 
383         return 0;
384 }
385 
386 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
387                                  u8 *data)
388 {
389         u32 val;
390         int i, ret;
391 
392         BUG_ON(!dev);
393         BUG_ON(!data);
394 
395         ret = smsc95xx_eeprom_confirm_not_busy(dev);
396         if (ret)
397                 return ret;
398 
399         /* Issue write/erase enable command */
400         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
401         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
402         if (ret < 0) {
403                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
404                 return ret;
405         }
406 
407         ret = smsc95xx_wait_eeprom(dev);
408         if (ret < 0)
409                 return ret;
410 
411         for (i = 0; i < length; i++) {
412 
413                 /* Fill data register */
414                 val = data[i];
415                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
416                 if (ret < 0) {
417                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
418                         return ret;
419                 }
420 
421                 /* Send "write" command */
422                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
423                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
424                 if (ret < 0) {
425                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
426                         return ret;
427                 }
428 
429                 ret = smsc95xx_wait_eeprom(dev);
430                 if (ret < 0)
431                         return ret;
432 
433                 offset++;
434         }
435 
436         return 0;
437 }
438 
439 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
440                                                  u32 data)
441 {
442         const u16 size = 4;
443         u32 buf;
444         int ret;
445 
446         buf = data;
447         cpu_to_le32s(&buf);
448 
449         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
450                                      USB_DIR_OUT | USB_TYPE_VENDOR |
451                                      USB_RECIP_DEVICE,
452                                      0, index, &buf, size);
453         if (ret < 0)
454                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
455                             ret);
456         return ret;
457 }
458 
459 /* returns hash bit number for given MAC address
460  * example:
461  * 01 00 5E 00 00 01 -> returns bit number 31 */
462 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
463 {
464         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
465 }
466 
467 static void smsc95xx_set_multicast(struct net_device *netdev)
468 {
469         struct usbnet *dev = netdev_priv(netdev);
470         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
471         unsigned long flags;
472         int ret;
473 
474         pdata->hash_hi = 0;
475         pdata->hash_lo = 0;
476 
477         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
478 
479         if (dev->net->flags & IFF_PROMISC) {
480                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
481                 pdata->mac_cr |= MAC_CR_PRMS_;
482                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
483         } else if (dev->net->flags & IFF_ALLMULTI) {
484                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
485                 pdata->mac_cr |= MAC_CR_MCPAS_;
486                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
487         } else if (!netdev_mc_empty(dev->net)) {
488                 struct netdev_hw_addr *ha;
489 
490                 pdata->mac_cr |= MAC_CR_HPFILT_;
491                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
492 
493                 netdev_for_each_mc_addr(ha, netdev) {
494                         u32 bitnum = smsc95xx_hash(ha->addr);
495                         u32 mask = 0x01 << (bitnum & 0x1F);
496                         if (bitnum & 0x20)
497                                 pdata->hash_hi |= mask;
498                         else
499                                 pdata->hash_lo |= mask;
500                 }
501 
502                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
503                                    pdata->hash_hi, pdata->hash_lo);
504         } else {
505                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
506                 pdata->mac_cr &=
507                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
508         }
509 
510         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
511 
512         /* Initiate async writes, as we can't wait for completion here */
513         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
514         if (ret < 0)
515                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
516 
517         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
518         if (ret < 0)
519                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
520 
521         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
522         if (ret < 0)
523                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
524 }
525 
526 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
527                                            u16 lcladv, u16 rmtadv)
528 {
529         u32 flow, afc_cfg = 0;
530 
531         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
532         if (ret < 0)
533                 return ret;
534 
535         if (duplex == DUPLEX_FULL) {
536                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
537 
538                 if (cap & FLOW_CTRL_RX)
539                         flow = 0xFFFF0002;
540                 else
541                         flow = 0;
542 
543                 if (cap & FLOW_CTRL_TX)
544                         afc_cfg |= 0xF;
545                 else
546                         afc_cfg &= ~0xF;
547 
548                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
549                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
550                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
551         } else {
552                 netif_dbg(dev, link, dev->net, "half duplex\n");
553                 flow = 0;
554                 afc_cfg |= 0xF;
555         }
556 
557         ret = smsc95xx_write_reg(dev, FLOW, flow);
558         if (ret < 0)
559                 return ret;
560 
561         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
562 }
563 
564 static int smsc95xx_link_reset(struct usbnet *dev)
565 {
566         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
567         struct mii_if_info *mii = &dev->mii;
568         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
569         unsigned long flags;
570         u16 lcladv, rmtadv;
571         int ret;
572 
573         /* clear interrupt status */
574         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
575         if (ret < 0)
576                 return ret;
577 
578         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
579         if (ret < 0)
580                 return ret;
581 
582         mii_check_media(mii, 1, 1);
583         mii_ethtool_gset(&dev->mii, &ecmd);
584         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
585         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
586 
587         netif_dbg(dev, link, dev->net,
588                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
589                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
590 
591         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
592         if (ecmd.duplex != DUPLEX_FULL) {
593                 pdata->mac_cr &= ~MAC_CR_FDPX_;
594                 pdata->mac_cr |= MAC_CR_RCVOWN_;
595         } else {
596                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
597                 pdata->mac_cr |= MAC_CR_FDPX_;
598         }
599         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
600 
601         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
602         if (ret < 0)
603                 return ret;
604 
605         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
606         if (ret < 0)
607                 netdev_warn(dev->net, "Error updating PHY flow control\n");
608 
609         return ret;
610 }
611 
612 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
613 {
614         u32 intdata;
615 
616         if (urb->actual_length != 4) {
617                 netdev_warn(dev->net, "unexpected urb length %d\n",
618                             urb->actual_length);
619                 return;
620         }
621 
622         memcpy(&intdata, urb->transfer_buffer, 4);
623         le32_to_cpus(&intdata);
624 
625         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
626 
627         if (intdata & INT_ENP_PHY_INT_)
628                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
629         else
630                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
631                             intdata);
632 }
633 
634 static void set_carrier(struct usbnet *dev, bool link)
635 {
636         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
637 
638         if (pdata->link_ok == link)
639                 return;
640 
641         pdata->link_ok = link;
642 
643         if (link)
644                 usbnet_link_change(dev, 1, 0);
645         else
646                 usbnet_link_change(dev, 0, 0);
647 }
648 
649 static void check_carrier(struct work_struct *work)
650 {
651         struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
652                                                 carrier_check.work);
653         struct usbnet *dev = pdata->dev;
654         int ret;
655 
656         if (pdata->suspend_flags != 0)
657                 return;
658 
659         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
660         if (ret < 0) {
661                 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
662                 return;
663         }
664         if (ret & BMSR_LSTATUS)
665                 set_carrier(dev, 1);
666         else
667                 set_carrier(dev, 0);
668 
669         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
670 }
671 
672 /* Enable or disable Tx & Rx checksum offload engines */
673 static int smsc95xx_set_features(struct net_device *netdev,
674         netdev_features_t features)
675 {
676         struct usbnet *dev = netdev_priv(netdev);
677         u32 read_buf;
678         int ret;
679 
680         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
681         if (ret < 0)
682                 return ret;
683 
684         if (features & NETIF_F_HW_CSUM)
685                 read_buf |= Tx_COE_EN_;
686         else
687                 read_buf &= ~Tx_COE_EN_;
688 
689         if (features & NETIF_F_RXCSUM)
690                 read_buf |= Rx_COE_EN_;
691         else
692                 read_buf &= ~Rx_COE_EN_;
693 
694         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
695         if (ret < 0)
696                 return ret;
697 
698         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
699         return 0;
700 }
701 
702 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
703 {
704         return MAX_EEPROM_SIZE;
705 }
706 
707 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
708                                        struct ethtool_eeprom *ee, u8 *data)
709 {
710         struct usbnet *dev = netdev_priv(netdev);
711 
712         ee->magic = LAN95XX_EEPROM_MAGIC;
713 
714         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
715 }
716 
717 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
718                                        struct ethtool_eeprom *ee, u8 *data)
719 {
720         struct usbnet *dev = netdev_priv(netdev);
721 
722         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
723                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
724                             ee->magic);
725                 return -EINVAL;
726         }
727 
728         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
729 }
730 
731 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
732 {
733         /* all smsc95xx registers */
734         return COE_CR - ID_REV + sizeof(u32);
735 }
736 
737 static void
738 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
739                          void *buf)
740 {
741         struct usbnet *dev = netdev_priv(netdev);
742         unsigned int i, j;
743         int retval;
744         u32 *data = buf;
745 
746         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
747         if (retval < 0) {
748                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
749                 return;
750         }
751 
752         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
753                 retval = smsc95xx_read_reg(dev, i, &data[j]);
754                 if (retval < 0) {
755                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
756                         return;
757                 }
758         }
759 }
760 
761 static void smsc95xx_ethtool_get_wol(struct net_device *net,
762                                      struct ethtool_wolinfo *wolinfo)
763 {
764         struct usbnet *dev = netdev_priv(net);
765         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
766 
767         wolinfo->supported = SUPPORTED_WAKE;
768         wolinfo->wolopts = pdata->wolopts;
769 }
770 
771 static int smsc95xx_ethtool_set_wol(struct net_device *net,
772                                     struct ethtool_wolinfo *wolinfo)
773 {
774         struct usbnet *dev = netdev_priv(net);
775         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
776         int ret;
777 
778         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
779 
780         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
781         if (ret < 0)
782                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
783 
784         return ret;
785 }
786 
787 static int get_mdix_status(struct net_device *net)
788 {
789         struct usbnet *dev = netdev_priv(net);
790         u32 val;
791         int buf;
792 
793         buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
794         if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
795                 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
796                         return ETH_TP_MDI_AUTO;
797                 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
798                         return ETH_TP_MDI_X;
799         } else {
800                 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
801                 if (val & STRAP_STATUS_AMDIX_EN_)
802                         return ETH_TP_MDI_AUTO;
803         }
804 
805         return ETH_TP_MDI;
806 }
807 
808 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
809 {
810         struct usbnet *dev = netdev_priv(net);
811         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
812         int buf;
813 
814         if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
815             (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
816             (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
817             (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
818                 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
819                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
820                                          PHY_EDPD_CONFIG);
821                 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
822                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
823                                     PHY_EDPD_CONFIG, buf);
824         }
825 
826         if (mdix_ctrl == ETH_TP_MDI) {
827                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
828                                          SPECIAL_CTRL_STS);
829                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
830                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
831                          SPECIAL_CTRL_STS_AMDIX_STATE_);
832                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
833                                     SPECIAL_CTRL_STS, buf);
834         } else if (mdix_ctrl == ETH_TP_MDI_X) {
835                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
836                                          SPECIAL_CTRL_STS);
837                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
838                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
839                          SPECIAL_CTRL_STS_AMDIX_STATE_);
840                 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
841                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
842                                     SPECIAL_CTRL_STS, buf);
843         } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
844                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
845                                          SPECIAL_CTRL_STS);
846                 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
847                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
848                          SPECIAL_CTRL_STS_AMDIX_STATE_);
849                 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
850                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
851                                     SPECIAL_CTRL_STS, buf);
852         }
853         pdata->mdix_ctrl = mdix_ctrl;
854 }
855 
856 static int smsc95xx_get_settings(struct net_device *net,
857                                  struct ethtool_cmd *cmd)
858 {
859         struct usbnet *dev = netdev_priv(net);
860         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
861         int retval;
862 
863         retval = usbnet_get_settings(net, cmd);
864 
865         cmd->eth_tp_mdix = pdata->mdix_ctrl;
866         cmd->eth_tp_mdix_ctrl = pdata->mdix_ctrl;
867 
868         return retval;
869 }
870 
871 static int smsc95xx_set_settings(struct net_device *net,
872                                  struct ethtool_cmd *cmd)
873 {
874         struct usbnet *dev = netdev_priv(net);
875         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
876         int retval;
877 
878         if (pdata->mdix_ctrl != cmd->eth_tp_mdix_ctrl)
879                 set_mdix_status(net, cmd->eth_tp_mdix_ctrl);
880 
881         retval = usbnet_set_settings(net, cmd);
882 
883         return retval;
884 }
885 
886 static const struct ethtool_ops smsc95xx_ethtool_ops = {
887         .get_link       = usbnet_get_link,
888         .nway_reset     = usbnet_nway_reset,
889         .get_drvinfo    = usbnet_get_drvinfo,
890         .get_msglevel   = usbnet_get_msglevel,
891         .set_msglevel   = usbnet_set_msglevel,
892         .get_settings   = smsc95xx_get_settings,
893         .set_settings   = smsc95xx_set_settings,
894         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
895         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
896         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
897         .get_regs_len   = smsc95xx_ethtool_getregslen,
898         .get_regs       = smsc95xx_ethtool_getregs,
899         .get_wol        = smsc95xx_ethtool_get_wol,
900         .set_wol        = smsc95xx_ethtool_set_wol,
901 };
902 
903 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
904 {
905         struct usbnet *dev = netdev_priv(netdev);
906 
907         if (!netif_running(netdev))
908                 return -EINVAL;
909 
910         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
911 }
912 
913 static void smsc95xx_init_mac_address(struct usbnet *dev)
914 {
915         const u8 *mac_addr;
916 
917         /* maybe the boot loader passed the MAC address in devicetree */
918         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
919         if (mac_addr) {
920                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
921                 return;
922         }
923 
924         /* try reading mac address from EEPROM */
925         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
926                         dev->net->dev_addr) == 0) {
927                 if (is_valid_ether_addr(dev->net->dev_addr)) {
928                         /* eeprom values are valid so use them */
929                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
930                         return;
931                 }
932         }
933 
934         /* no useful static MAC address found. generate a random one */
935         eth_hw_addr_random(dev->net);
936         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
937 }
938 
939 static int smsc95xx_set_mac_address(struct usbnet *dev)
940 {
941         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
942                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
943         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
944         int ret;
945 
946         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
947         if (ret < 0)
948                 return ret;
949 
950         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
951 }
952 
953 /* starts the TX path */
954 static int smsc95xx_start_tx_path(struct usbnet *dev)
955 {
956         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
957         unsigned long flags;
958         int ret;
959 
960         /* Enable Tx at MAC */
961         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
962         pdata->mac_cr |= MAC_CR_TXEN_;
963         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
964 
965         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
966         if (ret < 0)
967                 return ret;
968 
969         /* Enable Tx at SCSRs */
970         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
971 }
972 
973 /* Starts the Receive path */
974 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
975 {
976         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
977         unsigned long flags;
978 
979         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
980         pdata->mac_cr |= MAC_CR_RXEN_;
981         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
982 
983         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
984 }
985 
986 static int smsc95xx_phy_initialize(struct usbnet *dev)
987 {
988         int bmcr, ret, timeout = 0;
989 
990         /* Initialize MII structure */
991         dev->mii.dev = dev->net;
992         dev->mii.mdio_read = smsc95xx_mdio_read;
993         dev->mii.mdio_write = smsc95xx_mdio_write;
994         dev->mii.phy_id_mask = 0x1f;
995         dev->mii.reg_num_mask = 0x1f;
996         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
997 
998         /* reset phy and wait for reset to complete */
999         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1000 
1001         do {
1002                 msleep(10);
1003                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
1004                 timeout++;
1005         } while ((bmcr & BMCR_RESET) && (timeout < 100));
1006 
1007         if (timeout >= 100) {
1008                 netdev_warn(dev->net, "timeout on PHY Reset");
1009                 return -EIO;
1010         }
1011 
1012         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1013                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1014                 ADVERTISE_PAUSE_ASYM);
1015 
1016         /* read to clear */
1017         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1018         if (ret < 0) {
1019                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1020                 return ret;
1021         }
1022 
1023         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1024                 PHY_INT_MASK_DEFAULT_);
1025         mii_nway_restart(&dev->mii);
1026 
1027         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1028         return 0;
1029 }
1030 
1031 static int smsc95xx_reset(struct usbnet *dev)
1032 {
1033         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1034         u32 read_buf, write_buf, burst_cap;
1035         int ret = 0, timeout;
1036 
1037         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1038 
1039         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1040         if (ret < 0)
1041                 return ret;
1042 
1043         timeout = 0;
1044         do {
1045                 msleep(10);
1046                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1047                 if (ret < 0)
1048                         return ret;
1049                 timeout++;
1050         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1051 
1052         if (timeout >= 100) {
1053                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1054                 return ret;
1055         }
1056 
1057         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1058         if (ret < 0)
1059                 return ret;
1060 
1061         timeout = 0;
1062         do {
1063                 msleep(10);
1064                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1065                 if (ret < 0)
1066                         return ret;
1067                 timeout++;
1068         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1069 
1070         if (timeout >= 100) {
1071                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1072                 return ret;
1073         }
1074 
1075         ret = smsc95xx_set_mac_address(dev);
1076         if (ret < 0)
1077                 return ret;
1078 
1079         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1080                   dev->net->dev_addr);
1081 
1082         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1083         if (ret < 0)
1084                 return ret;
1085 
1086         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1087                   read_buf);
1088 
1089         read_buf |= HW_CFG_BIR_;
1090 
1091         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1092         if (ret < 0)
1093                 return ret;
1094 
1095         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1096         if (ret < 0)
1097                 return ret;
1098 
1099         netif_dbg(dev, ifup, dev->net,
1100                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1101                   read_buf);
1102 
1103         if (!turbo_mode) {
1104                 burst_cap = 0;
1105                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1106         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1107                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1108                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1109         } else {
1110                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1111                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1112         }
1113 
1114         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1115                   (ulong)dev->rx_urb_size);
1116 
1117         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1118         if (ret < 0)
1119                 return ret;
1120 
1121         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1122         if (ret < 0)
1123                 return ret;
1124 
1125         netif_dbg(dev, ifup, dev->net,
1126                   "Read Value from BURST_CAP after writing: 0x%08x\n",
1127                   read_buf);
1128 
1129         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1130         if (ret < 0)
1131                 return ret;
1132 
1133         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1134         if (ret < 0)
1135                 return ret;
1136 
1137         netif_dbg(dev, ifup, dev->net,
1138                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1139                   read_buf);
1140 
1141         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1142         if (ret < 0)
1143                 return ret;
1144 
1145         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1146                   read_buf);
1147 
1148         if (turbo_mode)
1149                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1150 
1151         read_buf &= ~HW_CFG_RXDOFF_;
1152 
1153         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1154         read_buf |= NET_IP_ALIGN << 9;
1155 
1156         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1157         if (ret < 0)
1158                 return ret;
1159 
1160         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1161         if (ret < 0)
1162                 return ret;
1163 
1164         netif_dbg(dev, ifup, dev->net,
1165                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1166 
1167         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1168         if (ret < 0)
1169                 return ret;
1170 
1171         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1172         if (ret < 0)
1173                 return ret;
1174         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1175 
1176         /* Configure GPIO pins as LED outputs */
1177         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1178                 LED_GPIO_CFG_FDX_LED;
1179         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1180         if (ret < 0)
1181                 return ret;
1182 
1183         /* Init Tx */
1184         ret = smsc95xx_write_reg(dev, FLOW, 0);
1185         if (ret < 0)
1186                 return ret;
1187 
1188         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1189         if (ret < 0)
1190                 return ret;
1191 
1192         /* Don't need mac_cr_lock during initialisation */
1193         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1194         if (ret < 0)
1195                 return ret;
1196 
1197         /* Init Rx */
1198         /* Set Vlan */
1199         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1200         if (ret < 0)
1201                 return ret;
1202 
1203         /* Enable or disable checksum offload engines */
1204         ret = smsc95xx_set_features(dev->net, dev->net->features);
1205         if (ret < 0) {
1206                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1207                 return ret;
1208         }
1209 
1210         smsc95xx_set_multicast(dev->net);
1211 
1212         ret = smsc95xx_phy_initialize(dev);
1213         if (ret < 0) {
1214                 netdev_warn(dev->net, "Failed to init PHY\n");
1215                 return ret;
1216         }
1217 
1218         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1219         if (ret < 0)
1220                 return ret;
1221 
1222         /* enable PHY interrupts */
1223         read_buf |= INT_EP_CTL_PHY_INT_;
1224 
1225         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1226         if (ret < 0)
1227                 return ret;
1228 
1229         ret = smsc95xx_start_tx_path(dev);
1230         if (ret < 0) {
1231                 netdev_warn(dev->net, "Failed to start TX path\n");
1232                 return ret;
1233         }
1234 
1235         ret = smsc95xx_start_rx_path(dev, 0);
1236         if (ret < 0) {
1237                 netdev_warn(dev->net, "Failed to start RX path\n");
1238                 return ret;
1239         }
1240 
1241         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1242         return 0;
1243 }
1244 
1245 static const struct net_device_ops smsc95xx_netdev_ops = {
1246         .ndo_open               = usbnet_open,
1247         .ndo_stop               = usbnet_stop,
1248         .ndo_start_xmit         = usbnet_start_xmit,
1249         .ndo_tx_timeout         = usbnet_tx_timeout,
1250         .ndo_change_mtu         = usbnet_change_mtu,
1251         .ndo_set_mac_address    = eth_mac_addr,
1252         .ndo_validate_addr      = eth_validate_addr,
1253         .ndo_do_ioctl           = smsc95xx_ioctl,
1254         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1255         .ndo_set_features       = smsc95xx_set_features,
1256 };
1257 
1258 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1259 {
1260         struct smsc95xx_priv *pdata = NULL;
1261         u32 val;
1262         int ret;
1263 
1264         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1265 
1266         ret = usbnet_get_endpoints(dev, intf);
1267         if (ret < 0) {
1268                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1269                 return ret;
1270         }
1271 
1272         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1273                                               GFP_KERNEL);
1274 
1275         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1276         if (!pdata)
1277                 return -ENOMEM;
1278 
1279         spin_lock_init(&pdata->mac_cr_lock);
1280 
1281         if (DEFAULT_TX_CSUM_ENABLE)
1282                 dev->net->features |= NETIF_F_HW_CSUM;
1283         if (DEFAULT_RX_CSUM_ENABLE)
1284                 dev->net->features |= NETIF_F_RXCSUM;
1285 
1286         dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1287 
1288         smsc95xx_init_mac_address(dev);
1289 
1290         /* Init all registers */
1291         ret = smsc95xx_reset(dev);
1292 
1293         /* detect device revision as different features may be available */
1294         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1295         if (ret < 0)
1296                 return ret;
1297         val >>= 16;
1298         pdata->chip_id = val;
1299         pdata->mdix_ctrl = get_mdix_status(dev->net);
1300 
1301         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1302             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1303                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1304                         FEATURE_PHY_NLP_CROSSOVER |
1305                         FEATURE_REMOTE_WAKEUP);
1306         else if (val == ID_REV_CHIP_ID_9512_)
1307                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1308 
1309         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1310         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1311         dev->net->flags |= IFF_MULTICAST;
1312         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1313         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1314 
1315         pdata->dev = dev;
1316         INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1317         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1318 
1319         return 0;
1320 }
1321 
1322 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1323 {
1324         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1325 
1326         if (pdata) {
1327                 cancel_delayed_work(&pdata->carrier_check);
1328                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1329                 kfree(pdata);
1330                 pdata = NULL;
1331                 dev->data[0] = 0;
1332         }
1333 }
1334 
1335 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1336 {
1337         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1338         return crc << ((filter % 2) * 16);
1339 }
1340 
1341 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1342 {
1343         struct mii_if_info *mii = &dev->mii;
1344         int ret;
1345 
1346         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1347 
1348         /* read to clear */
1349         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1350         if (ret < 0)
1351                 return ret;
1352 
1353         /* enable interrupt source */
1354         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1355         if (ret < 0)
1356                 return ret;
1357 
1358         ret |= mask;
1359 
1360         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1361 
1362         return 0;
1363 }
1364 
1365 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1366 {
1367         struct mii_if_info *mii = &dev->mii;
1368         int ret;
1369 
1370         /* first, a dummy read, needed to latch some MII phys */
1371         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1372         if (ret < 0)
1373                 return ret;
1374 
1375         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1376         if (ret < 0)
1377                 return ret;
1378 
1379         return !!(ret & BMSR_LSTATUS);
1380 }
1381 
1382 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1383 {
1384         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1385         u32 val;
1386         int ret;
1387 
1388         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1389         if (ret < 0)
1390                 return ret;
1391 
1392         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1393         val |= PM_CTL_SUS_MODE_0;
1394 
1395         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1396         if (ret < 0)
1397                 return ret;
1398 
1399         /* clear wol status */
1400         val &= ~PM_CTL_WUPS_;
1401         val |= PM_CTL_WUPS_WOL_;
1402 
1403         /* enable energy detection */
1404         if (pdata->wolopts & WAKE_PHY)
1405                 val |= PM_CTL_WUPS_ED_;
1406 
1407         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1408         if (ret < 0)
1409                 return ret;
1410 
1411         /* read back PM_CTRL */
1412         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1413         if (ret < 0)
1414                 return ret;
1415 
1416         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1417 
1418         return 0;
1419 }
1420 
1421 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1422 {
1423         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1424         struct mii_if_info *mii = &dev->mii;
1425         u32 val;
1426         int ret;
1427 
1428         /* reconfigure link pulse detection timing for
1429          * compatibility with non-standard link partners
1430          */
1431         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1432                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1433                         PHY_EDPD_CONFIG_DEFAULT);
1434 
1435         /* enable energy detect power-down mode */
1436         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1437         if (ret < 0)
1438                 return ret;
1439 
1440         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1441 
1442         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1443 
1444         /* enter SUSPEND1 mode */
1445         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1446         if (ret < 0)
1447                 return ret;
1448 
1449         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1450         val |= PM_CTL_SUS_MODE_1;
1451 
1452         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1453         if (ret < 0)
1454                 return ret;
1455 
1456         /* clear wol status, enable energy detection */
1457         val &= ~PM_CTL_WUPS_;
1458         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1459 
1460         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1461         if (ret < 0)
1462                 return ret;
1463 
1464         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1465 
1466         return 0;
1467 }
1468 
1469 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1470 {
1471         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1472         u32 val;
1473         int ret;
1474 
1475         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1476         if (ret < 0)
1477                 return ret;
1478 
1479         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1480         val |= PM_CTL_SUS_MODE_2;
1481 
1482         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1483         if (ret < 0)
1484                 return ret;
1485 
1486         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1487 
1488         return 0;
1489 }
1490 
1491 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1492 {
1493         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1494         u32 val;
1495         int ret;
1496 
1497         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1498         if (ret < 0)
1499                 return ret;
1500 
1501         if (val & 0xFFFF) {
1502                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1503                 return -EBUSY;
1504         }
1505 
1506         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1507         if (ret < 0)
1508                 return ret;
1509 
1510         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1511         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1512 
1513         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1514         if (ret < 0)
1515                 return ret;
1516 
1517         /* clear wol status */
1518         val &= ~PM_CTL_WUPS_;
1519         val |= PM_CTL_WUPS_WOL_;
1520 
1521         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1522         if (ret < 0)
1523                 return ret;
1524 
1525         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1526 
1527         return 0;
1528 }
1529 
1530 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1531 {
1532         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1533         int ret;
1534 
1535         if (!netif_running(dev->net)) {
1536                 /* interface is ifconfig down so fully power down hw */
1537                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1538                 return smsc95xx_enter_suspend2(dev);
1539         }
1540 
1541         if (!link_up) {
1542                 /* link is down so enter EDPD mode, but only if device can
1543                  * reliably resume from it.  This check should be redundant
1544                  * as current FEATURE_REMOTE_WAKEUP parts also support
1545                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1546                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1547                         netdev_warn(dev->net, "EDPD not supported\n");
1548                         return -EBUSY;
1549                 }
1550 
1551                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1552 
1553                 /* enable PHY wakeup events for if cable is attached */
1554                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1555                         PHY_INT_MASK_ANEG_COMP_);
1556                 if (ret < 0) {
1557                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1558                         return ret;
1559                 }
1560 
1561                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1562                 return smsc95xx_enter_suspend1(dev);
1563         }
1564 
1565         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1566         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1567                 PHY_INT_MASK_LINK_DOWN_);
1568         if (ret < 0) {
1569                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1570                 return ret;
1571         }
1572 
1573         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1574         return smsc95xx_enter_suspend3(dev);
1575 }
1576 
1577 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1578 {
1579         struct usbnet *dev = usb_get_intfdata(intf);
1580         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1581         u32 val, link_up;
1582         int ret;
1583 
1584         ret = usbnet_suspend(intf, message);
1585         if (ret < 0) {
1586                 netdev_warn(dev->net, "usbnet_suspend error\n");
1587                 return ret;
1588         }
1589 
1590         if (pdata->suspend_flags) {
1591                 netdev_warn(dev->net, "error during last resume\n");
1592                 pdata->suspend_flags = 0;
1593         }
1594 
1595         /* determine if link is up using only _nopm functions */
1596         link_up = smsc95xx_link_ok_nopm(dev);
1597 
1598         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1599             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1600                 ret = smsc95xx_autosuspend(dev, link_up);
1601                 goto done;
1602         }
1603 
1604         /* if we get this far we're not autosuspending */
1605         /* if no wol options set, or if link is down and we're not waking on
1606          * PHY activity, enter lowest power SUSPEND2 mode
1607          */
1608         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1609                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1610                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1611 
1612                 /* disable energy detect (link up) & wake up events */
1613                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1614                 if (ret < 0)
1615                         goto done;
1616 
1617                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1618 
1619                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1620                 if (ret < 0)
1621                         goto done;
1622 
1623                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1624                 if (ret < 0)
1625                         goto done;
1626 
1627                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1628 
1629                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1630                 if (ret < 0)
1631                         goto done;
1632 
1633                 ret = smsc95xx_enter_suspend2(dev);
1634                 goto done;
1635         }
1636 
1637         if (pdata->wolopts & WAKE_PHY) {
1638                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1639                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1640                 if (ret < 0) {
1641                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1642                         goto done;
1643                 }
1644 
1645                 /* if link is down then configure EDPD and enter SUSPEND1,
1646                  * otherwise enter SUSPEND0 below
1647                  */
1648                 if (!link_up) {
1649                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1650                         ret = smsc95xx_enter_suspend1(dev);
1651                         goto done;
1652                 }
1653         }
1654 
1655         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1656                 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1657                 u32 command[2];
1658                 u32 offset[2];
1659                 u32 crc[4];
1660                 int wuff_filter_count =
1661                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1662                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1663                 int i, filter = 0;
1664 
1665                 if (!filter_mask) {
1666                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1667                         ret = -ENOMEM;
1668                         goto done;
1669                 }
1670 
1671                 memset(command, 0, sizeof(command));
1672                 memset(offset, 0, sizeof(offset));
1673                 memset(crc, 0, sizeof(crc));
1674 
1675                 if (pdata->wolopts & WAKE_BCAST) {
1676                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1677                         netdev_info(dev->net, "enabling broadcast detection\n");
1678                         filter_mask[filter * 4] = 0x003F;
1679                         filter_mask[filter * 4 + 1] = 0x00;
1680                         filter_mask[filter * 4 + 2] = 0x00;
1681                         filter_mask[filter * 4 + 3] = 0x00;
1682                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1683                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1684                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1685                         filter++;
1686                 }
1687 
1688                 if (pdata->wolopts & WAKE_MCAST) {
1689                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1690                         netdev_info(dev->net, "enabling multicast detection\n");
1691                         filter_mask[filter * 4] = 0x0007;
1692                         filter_mask[filter * 4 + 1] = 0x00;
1693                         filter_mask[filter * 4 + 2] = 0x00;
1694                         filter_mask[filter * 4 + 3] = 0x00;
1695                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1696                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1697                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1698                         filter++;
1699                 }
1700 
1701                 if (pdata->wolopts & WAKE_ARP) {
1702                         const u8 arp[] = {0x08, 0x06};
1703                         netdev_info(dev->net, "enabling ARP detection\n");
1704                         filter_mask[filter * 4] = 0x0003;
1705                         filter_mask[filter * 4 + 1] = 0x00;
1706                         filter_mask[filter * 4 + 2] = 0x00;
1707                         filter_mask[filter * 4 + 3] = 0x00;
1708                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1709                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1710                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1711                         filter++;
1712                 }
1713 
1714                 if (pdata->wolopts & WAKE_UCAST) {
1715                         netdev_info(dev->net, "enabling unicast detection\n");
1716                         filter_mask[filter * 4] = 0x003F;
1717                         filter_mask[filter * 4 + 1] = 0x00;
1718                         filter_mask[filter * 4 + 2] = 0x00;
1719                         filter_mask[filter * 4 + 3] = 0x00;
1720                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1721                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1722                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1723                         filter++;
1724                 }
1725 
1726                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1727                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1728                         if (ret < 0) {
1729                                 kfree(filter_mask);
1730                                 goto done;
1731                         }
1732                 }
1733                 kfree(filter_mask);
1734 
1735                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1736                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1737                         if (ret < 0)
1738                                 goto done;
1739                 }
1740 
1741                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1742                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1743                         if (ret < 0)
1744                                 goto done;
1745                 }
1746 
1747                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1748                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1749                         if (ret < 0)
1750                                 goto done;
1751                 }
1752 
1753                 /* clear any pending pattern match packet status */
1754                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1755                 if (ret < 0)
1756                         goto done;
1757 
1758                 val |= WUCSR_WUFR_;
1759 
1760                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1761                 if (ret < 0)
1762                         goto done;
1763         }
1764 
1765         if (pdata->wolopts & WAKE_MAGIC) {
1766                 /* clear any pending magic packet status */
1767                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1768                 if (ret < 0)
1769                         goto done;
1770 
1771                 val |= WUCSR_MPR_;
1772 
1773                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1774                 if (ret < 0)
1775                         goto done;
1776         }
1777 
1778         /* enable/disable wakeup sources */
1779         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1780         if (ret < 0)
1781                 goto done;
1782 
1783         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1784                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1785                 val |= WUCSR_WAKE_EN_;
1786         } else {
1787                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1788                 val &= ~WUCSR_WAKE_EN_;
1789         }
1790 
1791         if (pdata->wolopts & WAKE_MAGIC) {
1792                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1793                 val |= WUCSR_MPEN_;
1794         } else {
1795                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1796                 val &= ~WUCSR_MPEN_;
1797         }
1798 
1799         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1800         if (ret < 0)
1801                 goto done;
1802 
1803         /* enable wol wakeup source */
1804         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1805         if (ret < 0)
1806                 goto done;
1807 
1808         val |= PM_CTL_WOL_EN_;
1809 
1810         /* phy energy detect wakeup source */
1811         if (pdata->wolopts & WAKE_PHY)
1812                 val |= PM_CTL_ED_EN_;
1813 
1814         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1815         if (ret < 0)
1816                 goto done;
1817 
1818         /* enable receiver to enable frame reception */
1819         smsc95xx_start_rx_path(dev, 1);
1820 
1821         /* some wol options are enabled, so enter SUSPEND0 */
1822         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1823         ret = smsc95xx_enter_suspend0(dev);
1824 
1825 done:
1826         /*
1827          * TODO: resume() might need to handle the suspend failure
1828          * in system sleep
1829          */
1830         if (ret && PMSG_IS_AUTO(message))
1831                 usbnet_resume(intf);
1832         return ret;
1833 }
1834 
1835 static int smsc95xx_resume(struct usb_interface *intf)
1836 {
1837         struct usbnet *dev = usb_get_intfdata(intf);
1838         struct smsc95xx_priv *pdata;
1839         u8 suspend_flags;
1840         int ret;
1841         u32 val;
1842 
1843         BUG_ON(!dev);
1844         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1845         suspend_flags = pdata->suspend_flags;
1846 
1847         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1848 
1849         /* do this first to ensure it's cleared even in error case */
1850         pdata->suspend_flags = 0;
1851         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1852 
1853         if (suspend_flags & SUSPEND_ALLMODES) {
1854                 /* clear wake-up sources */
1855                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1856                 if (ret < 0)
1857                         return ret;
1858 
1859                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1860 
1861                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1862                 if (ret < 0)
1863                         return ret;
1864 
1865                 /* clear wake-up status */
1866                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1867                 if (ret < 0)
1868                         return ret;
1869 
1870                 val &= ~PM_CTL_WOL_EN_;
1871                 val |= PM_CTL_WUPS_;
1872 
1873                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1874                 if (ret < 0)
1875                         return ret;
1876         }
1877 
1878         ret = usbnet_resume(intf);
1879         if (ret < 0)
1880                 netdev_warn(dev->net, "usbnet_resume error\n");
1881 
1882         return ret;
1883 }
1884 
1885 static int smsc95xx_reset_resume(struct usb_interface *intf)
1886 {
1887         struct usbnet *dev = usb_get_intfdata(intf);
1888         int ret;
1889 
1890         ret = smsc95xx_reset(dev);
1891         if (ret < 0)
1892                 return ret;
1893 
1894         return smsc95xx_resume(intf);
1895 }
1896 
1897 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1898 {
1899         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1900         skb->ip_summed = CHECKSUM_COMPLETE;
1901         skb_trim(skb, skb->len - 2);
1902 }
1903 
1904 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1905 {
1906         /* This check is no longer done by usbnet */
1907         if (skb->len < dev->net->hard_header_len)
1908                 return 0;
1909 
1910         while (skb->len > 0) {
1911                 u32 header, align_count;
1912                 struct sk_buff *ax_skb;
1913                 unsigned char *packet;
1914                 u16 size;
1915 
1916                 memcpy(&header, skb->data, sizeof(header));
1917                 le32_to_cpus(&header);
1918                 skb_pull(skb, 4 + NET_IP_ALIGN);
1919                 packet = skb->data;
1920 
1921                 /* get the packet length */
1922                 size = (u16)((header & RX_STS_FL_) >> 16);
1923                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1924 
1925                 if (unlikely(header & RX_STS_ES_)) {
1926                         netif_dbg(dev, rx_err, dev->net,
1927                                   "Error header=0x%08x\n", header);
1928                         dev->net->stats.rx_errors++;
1929                         dev->net->stats.rx_dropped++;
1930 
1931                         if (header & RX_STS_CRC_) {
1932                                 dev->net->stats.rx_crc_errors++;
1933                         } else {
1934                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1935                                         dev->net->stats.rx_frame_errors++;
1936 
1937                                 if ((header & RX_STS_LE_) &&
1938                                         (!(header & RX_STS_FT_)))
1939                                         dev->net->stats.rx_length_errors++;
1940                         }
1941                 } else {
1942                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1943                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1944                                 netif_dbg(dev, rx_err, dev->net,
1945                                           "size err header=0x%08x\n", header);
1946                                 return 0;
1947                         }
1948 
1949                         /* last frame in this batch */
1950                         if (skb->len == size) {
1951                                 if (dev->net->features & NETIF_F_RXCSUM)
1952                                         smsc95xx_rx_csum_offload(skb);
1953                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1954                                 skb->truesize = size + sizeof(struct sk_buff);
1955 
1956                                 return 1;
1957                         }
1958 
1959                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1960                         if (unlikely(!ax_skb)) {
1961                                 netdev_warn(dev->net, "Error allocating skb\n");
1962                                 return 0;
1963                         }
1964 
1965                         ax_skb->len = size;
1966                         ax_skb->data = packet;
1967                         skb_set_tail_pointer(ax_skb, size);
1968 
1969                         if (dev->net->features & NETIF_F_RXCSUM)
1970                                 smsc95xx_rx_csum_offload(ax_skb);
1971                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1972                         ax_skb->truesize = size + sizeof(struct sk_buff);
1973 
1974                         usbnet_skb_return(dev, ax_skb);
1975                 }
1976 
1977                 skb_pull(skb, size);
1978 
1979                 /* padding bytes before the next frame starts */
1980                 if (skb->len)
1981                         skb_pull(skb, align_count);
1982         }
1983 
1984         return 1;
1985 }
1986 
1987 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1988 {
1989         u16 low_16 = (u16)skb_checksum_start_offset(skb);
1990         u16 high_16 = low_16 + skb->csum_offset;
1991         return (high_16 << 16) | low_16;
1992 }
1993 
1994 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1995                                          struct sk_buff *skb, gfp_t flags)
1996 {
1997         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1998         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1999         u32 tx_cmd_a, tx_cmd_b;
2000 
2001         /* We do not advertise SG, so skbs should be already linearized */
2002         BUG_ON(skb_shinfo(skb)->nr_frags);
2003 
2004         if (skb_headroom(skb) < overhead) {
2005                 struct sk_buff *skb2 = skb_copy_expand(skb,
2006                         overhead, 0, flags);
2007                 dev_kfree_skb_any(skb);
2008                 skb = skb2;
2009                 if (!skb)
2010                         return NULL;
2011         }
2012 
2013         if (csum) {
2014                 if (skb->len <= 45) {
2015                         /* workaround - hardware tx checksum does not work
2016                          * properly with extremely small packets */
2017                         long csstart = skb_checksum_start_offset(skb);
2018                         __wsum calc = csum_partial(skb->data + csstart,
2019                                 skb->len - csstart, 0);
2020                         *((__sum16 *)(skb->data + csstart
2021                                 + skb->csum_offset)) = csum_fold(calc);
2022 
2023                         csum = false;
2024                 } else {
2025                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2026                         skb_push(skb, 4);
2027                         cpu_to_le32s(&csum_preamble);
2028                         memcpy(skb->data, &csum_preamble, 4);
2029                 }
2030         }
2031 
2032         skb_push(skb, 4);
2033         tx_cmd_b = (u32)(skb->len - 4);
2034         if (csum)
2035                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2036         cpu_to_le32s(&tx_cmd_b);
2037         memcpy(skb->data, &tx_cmd_b, 4);
2038 
2039         skb_push(skb, 4);
2040         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2041                 TX_CMD_A_LAST_SEG_;
2042         cpu_to_le32s(&tx_cmd_a);
2043         memcpy(skb->data, &tx_cmd_a, 4);
2044 
2045         return skb;
2046 }
2047 
2048 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2049 {
2050         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2051 
2052         dev->intf->needs_remote_wakeup = on;
2053 
2054         if (pdata->features & FEATURE_REMOTE_WAKEUP)
2055                 return 0;
2056 
2057         /* this chip revision isn't capable of remote wakeup */
2058         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2059 
2060         if (on)
2061                 usb_autopm_get_interface_no_resume(dev->intf);
2062         else
2063                 usb_autopm_put_interface(dev->intf);
2064 
2065         return 0;
2066 }
2067 
2068 static const struct driver_info smsc95xx_info = {
2069         .description    = "smsc95xx USB 2.0 Ethernet",
2070         .bind           = smsc95xx_bind,
2071         .unbind         = smsc95xx_unbind,
2072         .link_reset     = smsc95xx_link_reset,
2073         .reset          = smsc95xx_reset,
2074         .rx_fixup       = smsc95xx_rx_fixup,
2075         .tx_fixup       = smsc95xx_tx_fixup,
2076         .status         = smsc95xx_status,
2077         .manage_power   = smsc95xx_manage_power,
2078         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2079 };
2080 
2081 static const struct usb_device_id products[] = {
2082         {
2083                 /* SMSC9500 USB Ethernet Device */
2084                 USB_DEVICE(0x0424, 0x9500),
2085                 .driver_info = (unsigned long) &smsc95xx_info,
2086         },
2087         {
2088                 /* SMSC9505 USB Ethernet Device */
2089                 USB_DEVICE(0x0424, 0x9505),
2090                 .driver_info = (unsigned long) &smsc95xx_info,
2091         },
2092         {
2093                 /* SMSC9500A USB Ethernet Device */
2094                 USB_DEVICE(0x0424, 0x9E00),
2095                 .driver_info = (unsigned long) &smsc95xx_info,
2096         },
2097         {
2098                 /* SMSC9505A USB Ethernet Device */
2099                 USB_DEVICE(0x0424, 0x9E01),
2100                 .driver_info = (unsigned long) &smsc95xx_info,
2101         },
2102         {
2103                 /* SMSC9512/9514 USB Hub & Ethernet Device */
2104                 USB_DEVICE(0x0424, 0xec00),
2105                 .driver_info = (unsigned long) &smsc95xx_info,
2106         },
2107         {
2108                 /* SMSC9500 USB Ethernet Device (SAL10) */
2109                 USB_DEVICE(0x0424, 0x9900),
2110                 .driver_info = (unsigned long) &smsc95xx_info,
2111         },
2112         {
2113                 /* SMSC9505 USB Ethernet Device (SAL10) */
2114                 USB_DEVICE(0x0424, 0x9901),
2115                 .driver_info = (unsigned long) &smsc95xx_info,
2116         },
2117         {
2118                 /* SMSC9500A USB Ethernet Device (SAL10) */
2119                 USB_DEVICE(0x0424, 0x9902),
2120                 .driver_info = (unsigned long) &smsc95xx_info,
2121         },
2122         {
2123                 /* SMSC9505A USB Ethernet Device (SAL10) */
2124                 USB_DEVICE(0x0424, 0x9903),
2125                 .driver_info = (unsigned long) &smsc95xx_info,
2126         },
2127         {
2128                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2129                 USB_DEVICE(0x0424, 0x9904),
2130                 .driver_info = (unsigned long) &smsc95xx_info,
2131         },
2132         {
2133                 /* SMSC9500A USB Ethernet Device (HAL) */
2134                 USB_DEVICE(0x0424, 0x9905),
2135                 .driver_info = (unsigned long) &smsc95xx_info,
2136         },
2137         {
2138                 /* SMSC9505A USB Ethernet Device (HAL) */
2139                 USB_DEVICE(0x0424, 0x9906),
2140                 .driver_info = (unsigned long) &smsc95xx_info,
2141         },
2142         {
2143                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2144                 USB_DEVICE(0x0424, 0x9907),
2145                 .driver_info = (unsigned long) &smsc95xx_info,
2146         },
2147         {
2148                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2149                 USB_DEVICE(0x0424, 0x9908),
2150                 .driver_info = (unsigned long) &smsc95xx_info,
2151         },
2152         {
2153                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2154                 USB_DEVICE(0x0424, 0x9909),
2155                 .driver_info = (unsigned long) &smsc95xx_info,
2156         },
2157         {
2158                 /* SMSC LAN9530 USB Ethernet Device */
2159                 USB_DEVICE(0x0424, 0x9530),
2160                 .driver_info = (unsigned long) &smsc95xx_info,
2161         },
2162         {
2163                 /* SMSC LAN9730 USB Ethernet Device */
2164                 USB_DEVICE(0x0424, 0x9730),
2165                 .driver_info = (unsigned long) &smsc95xx_info,
2166         },
2167         {
2168                 /* SMSC LAN89530 USB Ethernet Device */
2169                 USB_DEVICE(0x0424, 0x9E08),
2170                 .driver_info = (unsigned long) &smsc95xx_info,
2171         },
2172         { },            /* END */
2173 };
2174 MODULE_DEVICE_TABLE(usb, products);
2175 
2176 static struct usb_driver smsc95xx_driver = {
2177         .name           = "smsc95xx",
2178         .id_table       = products,
2179         .probe          = usbnet_probe,
2180         .suspend        = smsc95xx_suspend,
2181         .resume         = smsc95xx_resume,
2182         .reset_resume   = smsc95xx_reset_resume,
2183         .disconnect     = usbnet_disconnect,
2184         .disable_hub_initiated_lpm = 1,
2185         .supports_autosuspend = 1,
2186 };
2187 
2188 module_usb_driver(smsc95xx_driver);
2189 
2190 MODULE_AUTHOR("Nancy Lin");
2191 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2192 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2193 MODULE_LICENSE("GPL");
2194 

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