2d17f3b9bb16568c19275864b325e700c4ff5e88
[sfrench/cifs-2.6.git] / 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             "1.0.6"
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 = 0, afc_cfg;
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
541                 if (cap & FLOW_CTRL_TX) {
542                         afc_cfg |= 0xF;
543                         flow |= 0xFFFF0000;
544                 } else {
545                         afc_cfg &= ~0xF;
546                 }
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                 afc_cfg |= 0xF;
554         }
555
556         ret = smsc95xx_write_reg(dev, FLOW, flow);
557         if (ret < 0)
558                 return ret;
559
560         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
561 }
562
563 static int smsc95xx_link_reset(struct usbnet *dev)
564 {
565         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
566         struct mii_if_info *mii = &dev->mii;
567         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
568         unsigned long flags;
569         u16 lcladv, rmtadv;
570         int ret;
571
572         /* clear interrupt status */
573         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
574         if (ret < 0)
575                 return ret;
576
577         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
578         if (ret < 0)
579                 return ret;
580
581         mii_check_media(mii, 1, 1);
582         mii_ethtool_gset(&dev->mii, &ecmd);
583         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
584         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
585
586         netif_dbg(dev, link, dev->net,
587                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
588                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
589
590         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
591         if (ecmd.duplex != DUPLEX_FULL) {
592                 pdata->mac_cr &= ~MAC_CR_FDPX_;
593                 pdata->mac_cr |= MAC_CR_RCVOWN_;
594         } else {
595                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
596                 pdata->mac_cr |= MAC_CR_FDPX_;
597         }
598         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
599
600         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
601         if (ret < 0)
602                 return ret;
603
604         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
605         if (ret < 0)
606                 netdev_warn(dev->net, "Error updating PHY flow control\n");
607
608         return ret;
609 }
610
611 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
612 {
613         u32 intdata;
614
615         if (urb->actual_length != 4) {
616                 netdev_warn(dev->net, "unexpected urb length %d\n",
617                             urb->actual_length);
618                 return;
619         }
620
621         memcpy(&intdata, urb->transfer_buffer, 4);
622         le32_to_cpus(&intdata);
623
624         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
625
626         if (intdata & INT_ENP_PHY_INT_)
627                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
628         else
629                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
630                             intdata);
631 }
632
633 static void set_carrier(struct usbnet *dev, bool link)
634 {
635         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
636
637         if (pdata->link_ok == link)
638                 return;
639
640         pdata->link_ok = link;
641
642         if (link)
643                 usbnet_link_change(dev, 1, 0);
644         else
645                 usbnet_link_change(dev, 0, 0);
646 }
647
648 static void check_carrier(struct work_struct *work)
649 {
650         struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
651                                                 carrier_check.work);
652         struct usbnet *dev = pdata->dev;
653         int ret;
654
655         if (pdata->suspend_flags != 0)
656                 return;
657
658         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
659         if (ret < 0) {
660                 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
661                 return;
662         }
663         if (ret & BMSR_LSTATUS)
664                 set_carrier(dev, 1);
665         else
666                 set_carrier(dev, 0);
667
668         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
669 }
670
671 /* Enable or disable Tx & Rx checksum offload engines */
672 static int smsc95xx_set_features(struct net_device *netdev,
673         netdev_features_t features)
674 {
675         struct usbnet *dev = netdev_priv(netdev);
676         u32 read_buf;
677         int ret;
678
679         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
680         if (ret < 0)
681                 return ret;
682
683         if (features & NETIF_F_IP_CSUM)
684                 read_buf |= Tx_COE_EN_;
685         else
686                 read_buf &= ~Tx_COE_EN_;
687
688         if (features & NETIF_F_RXCSUM)
689                 read_buf |= Rx_COE_EN_;
690         else
691                 read_buf &= ~Rx_COE_EN_;
692
693         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
694         if (ret < 0)
695                 return ret;
696
697         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
698         return 0;
699 }
700
701 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
702 {
703         return MAX_EEPROM_SIZE;
704 }
705
706 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
707                                        struct ethtool_eeprom *ee, u8 *data)
708 {
709         struct usbnet *dev = netdev_priv(netdev);
710
711         ee->magic = LAN95XX_EEPROM_MAGIC;
712
713         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
714 }
715
716 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
717                                        struct ethtool_eeprom *ee, u8 *data)
718 {
719         struct usbnet *dev = netdev_priv(netdev);
720
721         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
722                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
723                             ee->magic);
724                 return -EINVAL;
725         }
726
727         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
728 }
729
730 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
731 {
732         /* all smsc95xx registers */
733         return COE_CR - ID_REV + sizeof(u32);
734 }
735
736 static void
737 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
738                          void *buf)
739 {
740         struct usbnet *dev = netdev_priv(netdev);
741         unsigned int i, j;
742         int retval;
743         u32 *data = buf;
744
745         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
746         if (retval < 0) {
747                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
748                 return;
749         }
750
751         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
752                 retval = smsc95xx_read_reg(dev, i, &data[j]);
753                 if (retval < 0) {
754                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
755                         return;
756                 }
757         }
758 }
759
760 static void smsc95xx_ethtool_get_wol(struct net_device *net,
761                                      struct ethtool_wolinfo *wolinfo)
762 {
763         struct usbnet *dev = netdev_priv(net);
764         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
765
766         wolinfo->supported = SUPPORTED_WAKE;
767         wolinfo->wolopts = pdata->wolopts;
768 }
769
770 static int smsc95xx_ethtool_set_wol(struct net_device *net,
771                                     struct ethtool_wolinfo *wolinfo)
772 {
773         struct usbnet *dev = netdev_priv(net);
774         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
775         int ret;
776
777         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
778                 return -EINVAL;
779
780         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
781
782         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
783         if (ret < 0)
784                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
785
786         return ret;
787 }
788
789 static int get_mdix_status(struct net_device *net)
790 {
791         struct usbnet *dev = netdev_priv(net);
792         u32 val;
793         int buf;
794
795         buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
796         if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
797                 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
798                         return ETH_TP_MDI_AUTO;
799                 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
800                         return ETH_TP_MDI_X;
801         } else {
802                 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
803                 if (val & STRAP_STATUS_AMDIX_EN_)
804                         return ETH_TP_MDI_AUTO;
805         }
806
807         return ETH_TP_MDI;
808 }
809
810 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
811 {
812         struct usbnet *dev = netdev_priv(net);
813         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
814         int buf;
815
816         if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
817             (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
818             (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
819             (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
820                 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
821                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
822                                          PHY_EDPD_CONFIG);
823                 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
824                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
825                                     PHY_EDPD_CONFIG, buf);
826         }
827
828         if (mdix_ctrl == ETH_TP_MDI) {
829                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
830                                          SPECIAL_CTRL_STS);
831                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
832                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
833                          SPECIAL_CTRL_STS_AMDIX_STATE_);
834                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
835                                     SPECIAL_CTRL_STS, buf);
836         } else if (mdix_ctrl == ETH_TP_MDI_X) {
837                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
838                                          SPECIAL_CTRL_STS);
839                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
840                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
841                          SPECIAL_CTRL_STS_AMDIX_STATE_);
842                 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
843                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
844                                     SPECIAL_CTRL_STS, buf);
845         } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
846                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
847                                          SPECIAL_CTRL_STS);
848                 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
849                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
850                          SPECIAL_CTRL_STS_AMDIX_STATE_);
851                 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
852                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
853                                     SPECIAL_CTRL_STS, buf);
854         }
855         pdata->mdix_ctrl = mdix_ctrl;
856 }
857
858 static int smsc95xx_get_link_ksettings(struct net_device *net,
859                                        struct ethtool_link_ksettings *cmd)
860 {
861         struct usbnet *dev = netdev_priv(net);
862         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
863         int retval;
864
865         retval = usbnet_get_link_ksettings(net, cmd);
866
867         cmd->base.eth_tp_mdix = pdata->mdix_ctrl;
868         cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl;
869
870         return retval;
871 }
872
873 static int smsc95xx_set_link_ksettings(struct net_device *net,
874                                        const struct ethtool_link_ksettings *cmd)
875 {
876         struct usbnet *dev = netdev_priv(net);
877         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
878         int retval;
879
880         if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl)
881                 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl);
882
883         retval = usbnet_set_link_ksettings(net, cmd);
884
885         return retval;
886 }
887
888 static const struct ethtool_ops smsc95xx_ethtool_ops = {
889         .get_link       = usbnet_get_link,
890         .nway_reset     = usbnet_nway_reset,
891         .get_drvinfo    = usbnet_get_drvinfo,
892         .get_msglevel   = usbnet_get_msglevel,
893         .set_msglevel   = usbnet_set_msglevel,
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         .get_link_ksettings     = smsc95xx_get_link_ksettings,
902         .set_link_ksettings     = smsc95xx_set_link_ksettings,
903         .get_ts_info    = ethtool_op_get_ts_info,
904 };
905
906 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
907 {
908         struct usbnet *dev = netdev_priv(netdev);
909
910         if (!netif_running(netdev))
911                 return -EINVAL;
912
913         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
914 }
915
916 static void smsc95xx_init_mac_address(struct usbnet *dev)
917 {
918         const u8 *mac_addr;
919
920         /* maybe the boot loader passed the MAC address in devicetree */
921         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
922         if (mac_addr) {
923                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
924                 return;
925         }
926
927         /* try reading mac address from EEPROM */
928         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
929                         dev->net->dev_addr) == 0) {
930                 if (is_valid_ether_addr(dev->net->dev_addr)) {
931                         /* eeprom values are valid so use them */
932                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
933                         return;
934                 }
935         }
936
937         /* no useful static MAC address found. generate a random one */
938         eth_hw_addr_random(dev->net);
939         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
940 }
941
942 static int smsc95xx_set_mac_address(struct usbnet *dev)
943 {
944         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
945                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
946         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
947         int ret;
948
949         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
950         if (ret < 0)
951                 return ret;
952
953         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
954 }
955
956 /* starts the TX path */
957 static int smsc95xx_start_tx_path(struct usbnet *dev)
958 {
959         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
960         unsigned long flags;
961         int ret;
962
963         /* Enable Tx at MAC */
964         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
965         pdata->mac_cr |= MAC_CR_TXEN_;
966         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
967
968         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
969         if (ret < 0)
970                 return ret;
971
972         /* Enable Tx at SCSRs */
973         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
974 }
975
976 /* Starts the Receive path */
977 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
978 {
979         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
980         unsigned long flags;
981
982         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
983         pdata->mac_cr |= MAC_CR_RXEN_;
984         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
985
986         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
987 }
988
989 static int smsc95xx_phy_initialize(struct usbnet *dev)
990 {
991         int bmcr, ret, timeout = 0;
992
993         /* Initialize MII structure */
994         dev->mii.dev = dev->net;
995         dev->mii.mdio_read = smsc95xx_mdio_read;
996         dev->mii.mdio_write = smsc95xx_mdio_write;
997         dev->mii.phy_id_mask = 0x1f;
998         dev->mii.reg_num_mask = 0x1f;
999         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
1000
1001         /* reset phy and wait for reset to complete */
1002         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1003
1004         do {
1005                 msleep(10);
1006                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
1007                 timeout++;
1008         } while ((bmcr & BMCR_RESET) && (timeout < 100));
1009
1010         if (timeout >= 100) {
1011                 netdev_warn(dev->net, "timeout on PHY Reset");
1012                 return -EIO;
1013         }
1014
1015         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1016                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1017                 ADVERTISE_PAUSE_ASYM);
1018
1019         /* read to clear */
1020         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1021         if (ret < 0) {
1022                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1023                 return ret;
1024         }
1025
1026         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1027                 PHY_INT_MASK_DEFAULT_);
1028         mii_nway_restart(&dev->mii);
1029
1030         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1031         return 0;
1032 }
1033
1034 static int smsc95xx_reset(struct usbnet *dev)
1035 {
1036         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1037         u32 read_buf, write_buf, burst_cap;
1038         int ret = 0, timeout;
1039
1040         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1041
1042         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1043         if (ret < 0)
1044                 return ret;
1045
1046         timeout = 0;
1047         do {
1048                 msleep(10);
1049                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1050                 if (ret < 0)
1051                         return ret;
1052                 timeout++;
1053         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1054
1055         if (timeout >= 100) {
1056                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1057                 return ret;
1058         }
1059
1060         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1061         if (ret < 0)
1062                 return ret;
1063
1064         timeout = 0;
1065         do {
1066                 msleep(10);
1067                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1068                 if (ret < 0)
1069                         return ret;
1070                 timeout++;
1071         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1072
1073         if (timeout >= 100) {
1074                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1075                 return ret;
1076         }
1077
1078         ret = smsc95xx_set_mac_address(dev);
1079         if (ret < 0)
1080                 return ret;
1081
1082         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1083                   dev->net->dev_addr);
1084
1085         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1086         if (ret < 0)
1087                 return ret;
1088
1089         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1090                   read_buf);
1091
1092         read_buf |= HW_CFG_BIR_;
1093
1094         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1095         if (ret < 0)
1096                 return ret;
1097
1098         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1099         if (ret < 0)
1100                 return ret;
1101
1102         netif_dbg(dev, ifup, dev->net,
1103                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1104                   read_buf);
1105
1106         if (!turbo_mode) {
1107                 burst_cap = 0;
1108                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1109         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1110                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1111                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1112         } else {
1113                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1114                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1115         }
1116
1117         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1118                   (ulong)dev->rx_urb_size);
1119
1120         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1121         if (ret < 0)
1122                 return ret;
1123
1124         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1125         if (ret < 0)
1126                 return ret;
1127
1128         netif_dbg(dev, ifup, dev->net,
1129                   "Read Value from BURST_CAP after writing: 0x%08x\n",
1130                   read_buf);
1131
1132         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1133         if (ret < 0)
1134                 return ret;
1135
1136         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1137         if (ret < 0)
1138                 return ret;
1139
1140         netif_dbg(dev, ifup, dev->net,
1141                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1142                   read_buf);
1143
1144         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1145         if (ret < 0)
1146                 return ret;
1147
1148         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1149                   read_buf);
1150
1151         if (turbo_mode)
1152                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1153
1154         read_buf &= ~HW_CFG_RXDOFF_;
1155
1156         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1157         read_buf |= NET_IP_ALIGN << 9;
1158
1159         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1160         if (ret < 0)
1161                 return ret;
1162
1163         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1164         if (ret < 0)
1165                 return ret;
1166
1167         netif_dbg(dev, ifup, dev->net,
1168                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1169
1170         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1171         if (ret < 0)
1172                 return ret;
1173
1174         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1175         if (ret < 0)
1176                 return ret;
1177         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1178
1179         /* Configure GPIO pins as LED outputs */
1180         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1181                 LED_GPIO_CFG_FDX_LED;
1182         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1183         if (ret < 0)
1184                 return ret;
1185
1186         /* Init Tx */
1187         ret = smsc95xx_write_reg(dev, FLOW, 0);
1188         if (ret < 0)
1189                 return ret;
1190
1191         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1192         if (ret < 0)
1193                 return ret;
1194
1195         /* Don't need mac_cr_lock during initialisation */
1196         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1197         if (ret < 0)
1198                 return ret;
1199
1200         /* Init Rx */
1201         /* Set Vlan */
1202         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1203         if (ret < 0)
1204                 return ret;
1205
1206         /* Enable or disable checksum offload engines */
1207         ret = smsc95xx_set_features(dev->net, dev->net->features);
1208         if (ret < 0) {
1209                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1210                 return ret;
1211         }
1212
1213         smsc95xx_set_multicast(dev->net);
1214
1215         ret = smsc95xx_phy_initialize(dev);
1216         if (ret < 0) {
1217                 netdev_warn(dev->net, "Failed to init PHY\n");
1218                 return ret;
1219         }
1220
1221         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1222         if (ret < 0)
1223                 return ret;
1224
1225         /* enable PHY interrupts */
1226         read_buf |= INT_EP_CTL_PHY_INT_;
1227
1228         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1229         if (ret < 0)
1230                 return ret;
1231
1232         ret = smsc95xx_start_tx_path(dev);
1233         if (ret < 0) {
1234                 netdev_warn(dev->net, "Failed to start TX path\n");
1235                 return ret;
1236         }
1237
1238         ret = smsc95xx_start_rx_path(dev, 0);
1239         if (ret < 0) {
1240                 netdev_warn(dev->net, "Failed to start RX path\n");
1241                 return ret;
1242         }
1243
1244         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1245         return 0;
1246 }
1247
1248 static const struct net_device_ops smsc95xx_netdev_ops = {
1249         .ndo_open               = usbnet_open,
1250         .ndo_stop               = usbnet_stop,
1251         .ndo_start_xmit         = usbnet_start_xmit,
1252         .ndo_tx_timeout         = usbnet_tx_timeout,
1253         .ndo_change_mtu         = usbnet_change_mtu,
1254         .ndo_get_stats64        = usbnet_get_stats64,
1255         .ndo_set_mac_address    = eth_mac_addr,
1256         .ndo_validate_addr      = eth_validate_addr,
1257         .ndo_do_ioctl           = smsc95xx_ioctl,
1258         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1259         .ndo_set_features       = smsc95xx_set_features,
1260 };
1261
1262 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1263 {
1264         struct smsc95xx_priv *pdata = NULL;
1265         u32 val;
1266         int ret;
1267
1268         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1269
1270         ret = usbnet_get_endpoints(dev, intf);
1271         if (ret < 0) {
1272                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1273                 return ret;
1274         }
1275
1276         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1277                                               GFP_KERNEL);
1278
1279         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1280         if (!pdata)
1281                 return -ENOMEM;
1282
1283         spin_lock_init(&pdata->mac_cr_lock);
1284
1285         /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1286          * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1287          * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1288          * it is transmitted as all ones. The zero transmitted checksum means
1289          * transmitter generated no checksum. Hence, enable csum offload only
1290          * for ipv4 packets.
1291          */
1292         if (DEFAULT_TX_CSUM_ENABLE)
1293                 dev->net->features |= NETIF_F_IP_CSUM;
1294         if (DEFAULT_RX_CSUM_ENABLE)
1295                 dev->net->features |= NETIF_F_RXCSUM;
1296
1297         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1298
1299         smsc95xx_init_mac_address(dev);
1300
1301         /* Init all registers */
1302         ret = smsc95xx_reset(dev);
1303
1304         /* detect device revision as different features may be available */
1305         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1306         if (ret < 0)
1307                 return ret;
1308         val >>= 16;
1309         pdata->chip_id = val;
1310         pdata->mdix_ctrl = get_mdix_status(dev->net);
1311
1312         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1313             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1314                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1315                         FEATURE_PHY_NLP_CROSSOVER |
1316                         FEATURE_REMOTE_WAKEUP);
1317         else if (val == ID_REV_CHIP_ID_9512_)
1318                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1319
1320         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1321         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1322         dev->net->flags |= IFF_MULTICAST;
1323         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1324         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1325
1326         pdata->dev = dev;
1327         INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1328         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1329
1330         return 0;
1331 }
1332
1333 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1334 {
1335         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1336
1337         if (pdata) {
1338                 cancel_delayed_work(&pdata->carrier_check);
1339                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1340                 kfree(pdata);
1341                 pdata = NULL;
1342                 dev->data[0] = 0;
1343         }
1344 }
1345
1346 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1347 {
1348         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1349         return crc << ((filter % 2) * 16);
1350 }
1351
1352 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1353 {
1354         struct mii_if_info *mii = &dev->mii;
1355         int ret;
1356
1357         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1358
1359         /* read to clear */
1360         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1361         if (ret < 0)
1362                 return ret;
1363
1364         /* enable interrupt source */
1365         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1366         if (ret < 0)
1367                 return ret;
1368
1369         ret |= mask;
1370
1371         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1372
1373         return 0;
1374 }
1375
1376 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1377 {
1378         struct mii_if_info *mii = &dev->mii;
1379         int ret;
1380
1381         /* first, a dummy read, needed to latch some MII phys */
1382         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1383         if (ret < 0)
1384                 return ret;
1385
1386         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1387         if (ret < 0)
1388                 return ret;
1389
1390         return !!(ret & BMSR_LSTATUS);
1391 }
1392
1393 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1394 {
1395         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1396         u32 val;
1397         int ret;
1398
1399         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1400         if (ret < 0)
1401                 return ret;
1402
1403         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1404         val |= PM_CTL_SUS_MODE_0;
1405
1406         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1407         if (ret < 0)
1408                 return ret;
1409
1410         /* clear wol status */
1411         val &= ~PM_CTL_WUPS_;
1412         val |= PM_CTL_WUPS_WOL_;
1413
1414         /* enable energy detection */
1415         if (pdata->wolopts & WAKE_PHY)
1416                 val |= PM_CTL_WUPS_ED_;
1417
1418         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1419         if (ret < 0)
1420                 return ret;
1421
1422         /* read back PM_CTRL */
1423         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1424         if (ret < 0)
1425                 return ret;
1426
1427         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1428
1429         return 0;
1430 }
1431
1432 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1433 {
1434         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1435         struct mii_if_info *mii = &dev->mii;
1436         u32 val;
1437         int ret;
1438
1439         /* reconfigure link pulse detection timing for
1440          * compatibility with non-standard link partners
1441          */
1442         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1443                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1444                         PHY_EDPD_CONFIG_DEFAULT);
1445
1446         /* enable energy detect power-down mode */
1447         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1448         if (ret < 0)
1449                 return ret;
1450
1451         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1452
1453         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1454
1455         /* enter SUSPEND1 mode */
1456         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1457         if (ret < 0)
1458                 return ret;
1459
1460         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1461         val |= PM_CTL_SUS_MODE_1;
1462
1463         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1464         if (ret < 0)
1465                 return ret;
1466
1467         /* clear wol status, enable energy detection */
1468         val &= ~PM_CTL_WUPS_;
1469         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1470
1471         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1472         if (ret < 0)
1473                 return ret;
1474
1475         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1476
1477         return 0;
1478 }
1479
1480 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1481 {
1482         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1483         u32 val;
1484         int ret;
1485
1486         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1487         if (ret < 0)
1488                 return ret;
1489
1490         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1491         val |= PM_CTL_SUS_MODE_2;
1492
1493         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1494         if (ret < 0)
1495                 return ret;
1496
1497         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1498
1499         return 0;
1500 }
1501
1502 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1503 {
1504         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1505         u32 val;
1506         int ret;
1507
1508         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1509         if (ret < 0)
1510                 return ret;
1511
1512         if (val & RX_FIFO_INF_USED_) {
1513                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1514                 return -EBUSY;
1515         }
1516
1517         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1518         if (ret < 0)
1519                 return ret;
1520
1521         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1522         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1523
1524         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1525         if (ret < 0)
1526                 return ret;
1527
1528         /* clear wol status */
1529         val &= ~PM_CTL_WUPS_;
1530         val |= PM_CTL_WUPS_WOL_;
1531
1532         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1533         if (ret < 0)
1534                 return ret;
1535
1536         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1537
1538         return 0;
1539 }
1540
1541 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1542 {
1543         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1544         int ret;
1545
1546         if (!netif_running(dev->net)) {
1547                 /* interface is ifconfig down so fully power down hw */
1548                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1549                 return smsc95xx_enter_suspend2(dev);
1550         }
1551
1552         if (!link_up) {
1553                 /* link is down so enter EDPD mode, but only if device can
1554                  * reliably resume from it.  This check should be redundant
1555                  * as current FEATURE_REMOTE_WAKEUP parts also support
1556                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1557                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1558                         netdev_warn(dev->net, "EDPD not supported\n");
1559                         return -EBUSY;
1560                 }
1561
1562                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1563
1564                 /* enable PHY wakeup events for if cable is attached */
1565                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1566                         PHY_INT_MASK_ANEG_COMP_);
1567                 if (ret < 0) {
1568                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1569                         return ret;
1570                 }
1571
1572                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1573                 return smsc95xx_enter_suspend1(dev);
1574         }
1575
1576         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1577         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1578                 PHY_INT_MASK_LINK_DOWN_);
1579         if (ret < 0) {
1580                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1581                 return ret;
1582         }
1583
1584         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1585         return smsc95xx_enter_suspend3(dev);
1586 }
1587
1588 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1589 {
1590         struct usbnet *dev = usb_get_intfdata(intf);
1591         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1592         u32 val, link_up;
1593         int ret;
1594
1595         ret = usbnet_suspend(intf, message);
1596         if (ret < 0) {
1597                 netdev_warn(dev->net, "usbnet_suspend error\n");
1598                 return ret;
1599         }
1600
1601         cancel_delayed_work_sync(&pdata->carrier_check);
1602
1603         if (pdata->suspend_flags) {
1604                 netdev_warn(dev->net, "error during last resume\n");
1605                 pdata->suspend_flags = 0;
1606         }
1607
1608         /* determine if link is up using only _nopm functions */
1609         link_up = smsc95xx_link_ok_nopm(dev);
1610
1611         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1612             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1613                 ret = smsc95xx_autosuspend(dev, link_up);
1614                 goto done;
1615         }
1616
1617         /* if we get this far we're not autosuspending */
1618         /* if no wol options set, or if link is down and we're not waking on
1619          * PHY activity, enter lowest power SUSPEND2 mode
1620          */
1621         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1622                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1623                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1624
1625                 /* disable energy detect (link up) & wake up events */
1626                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1627                 if (ret < 0)
1628                         goto done;
1629
1630                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1631
1632                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1633                 if (ret < 0)
1634                         goto done;
1635
1636                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1637                 if (ret < 0)
1638                         goto done;
1639
1640                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1641
1642                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1643                 if (ret < 0)
1644                         goto done;
1645
1646                 ret = smsc95xx_enter_suspend2(dev);
1647                 goto done;
1648         }
1649
1650         if (pdata->wolopts & WAKE_PHY) {
1651                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1652                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1653                 if (ret < 0) {
1654                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1655                         goto done;
1656                 }
1657
1658                 /* if link is down then configure EDPD and enter SUSPEND1,
1659                  * otherwise enter SUSPEND0 below
1660                  */
1661                 if (!link_up) {
1662                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1663                         ret = smsc95xx_enter_suspend1(dev);
1664                         goto done;
1665                 }
1666         }
1667
1668         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1669                 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1670                 u32 command[2];
1671                 u32 offset[2];
1672                 u32 crc[4];
1673                 int wuff_filter_count =
1674                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1675                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1676                 int i, filter = 0;
1677
1678                 if (!filter_mask) {
1679                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1680                         ret = -ENOMEM;
1681                         goto done;
1682                 }
1683
1684                 memset(command, 0, sizeof(command));
1685                 memset(offset, 0, sizeof(offset));
1686                 memset(crc, 0, sizeof(crc));
1687
1688                 if (pdata->wolopts & WAKE_BCAST) {
1689                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1690                         netdev_info(dev->net, "enabling broadcast detection\n");
1691                         filter_mask[filter * 4] = 0x003F;
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] |= 0x05UL << ((filter % 4) * 8);
1696                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1697                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1698                         filter++;
1699                 }
1700
1701                 if (pdata->wolopts & WAKE_MCAST) {
1702                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1703                         netdev_info(dev->net, "enabling multicast detection\n");
1704                         filter_mask[filter * 4] = 0x0007;
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] |= 0x09UL << ((filter % 4) * 8);
1709                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1710                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1711                         filter++;
1712                 }
1713
1714                 if (pdata->wolopts & WAKE_ARP) {
1715                         const u8 arp[] = {0x08, 0x06};
1716                         netdev_info(dev->net, "enabling ARP detection\n");
1717                         filter_mask[filter * 4] = 0x0003;
1718                         filter_mask[filter * 4 + 1] = 0x00;
1719                         filter_mask[filter * 4 + 2] = 0x00;
1720                         filter_mask[filter * 4 + 3] = 0x00;
1721                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1722                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1723                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1724                         filter++;
1725                 }
1726
1727                 if (pdata->wolopts & WAKE_UCAST) {
1728                         netdev_info(dev->net, "enabling unicast detection\n");
1729                         filter_mask[filter * 4] = 0x003F;
1730                         filter_mask[filter * 4 + 1] = 0x00;
1731                         filter_mask[filter * 4 + 2] = 0x00;
1732                         filter_mask[filter * 4 + 3] = 0x00;
1733                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1734                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1735                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1736                         filter++;
1737                 }
1738
1739                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1740                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1741                         if (ret < 0) {
1742                                 kfree(filter_mask);
1743                                 goto done;
1744                         }
1745                 }
1746                 kfree(filter_mask);
1747
1748                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1749                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1750                         if (ret < 0)
1751                                 goto done;
1752                 }
1753
1754                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1755                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1756                         if (ret < 0)
1757                                 goto done;
1758                 }
1759
1760                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1761                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1762                         if (ret < 0)
1763                                 goto done;
1764                 }
1765
1766                 /* clear any pending pattern match packet status */
1767                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1768                 if (ret < 0)
1769                         goto done;
1770
1771                 val |= WUCSR_WUFR_;
1772
1773                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1774                 if (ret < 0)
1775                         goto done;
1776         }
1777
1778         if (pdata->wolopts & WAKE_MAGIC) {
1779                 /* clear any pending magic packet status */
1780                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1781                 if (ret < 0)
1782                         goto done;
1783
1784                 val |= WUCSR_MPR_;
1785
1786                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1787                 if (ret < 0)
1788                         goto done;
1789         }
1790
1791         /* enable/disable wakeup sources */
1792         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1793         if (ret < 0)
1794                 goto done;
1795
1796         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1797                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1798                 val |= WUCSR_WAKE_EN_;
1799         } else {
1800                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1801                 val &= ~WUCSR_WAKE_EN_;
1802         }
1803
1804         if (pdata->wolopts & WAKE_MAGIC) {
1805                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1806                 val |= WUCSR_MPEN_;
1807         } else {
1808                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1809                 val &= ~WUCSR_MPEN_;
1810         }
1811
1812         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1813         if (ret < 0)
1814                 goto done;
1815
1816         /* enable wol wakeup source */
1817         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1818         if (ret < 0)
1819                 goto done;
1820
1821         val |= PM_CTL_WOL_EN_;
1822
1823         /* phy energy detect wakeup source */
1824         if (pdata->wolopts & WAKE_PHY)
1825                 val |= PM_CTL_ED_EN_;
1826
1827         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1828         if (ret < 0)
1829                 goto done;
1830
1831         /* enable receiver to enable frame reception */
1832         smsc95xx_start_rx_path(dev, 1);
1833
1834         /* some wol options are enabled, so enter SUSPEND0 */
1835         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1836         ret = smsc95xx_enter_suspend0(dev);
1837
1838 done:
1839         /*
1840          * TODO: resume() might need to handle the suspend failure
1841          * in system sleep
1842          */
1843         if (ret && PMSG_IS_AUTO(message))
1844                 usbnet_resume(intf);
1845
1846         if (ret)
1847                 schedule_delayed_work(&pdata->carrier_check,
1848                                       CARRIER_CHECK_DELAY);
1849
1850         return ret;
1851 }
1852
1853 static int smsc95xx_resume(struct usb_interface *intf)
1854 {
1855         struct usbnet *dev = usb_get_intfdata(intf);
1856         struct smsc95xx_priv *pdata;
1857         u8 suspend_flags;
1858         int ret;
1859         u32 val;
1860
1861         BUG_ON(!dev);
1862         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1863         suspend_flags = pdata->suspend_flags;
1864
1865         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1866
1867         /* do this first to ensure it's cleared even in error case */
1868         pdata->suspend_flags = 0;
1869         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1870
1871         if (suspend_flags & SUSPEND_ALLMODES) {
1872                 /* clear wake-up sources */
1873                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1874                 if (ret < 0)
1875                         return ret;
1876
1877                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1878
1879                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1880                 if (ret < 0)
1881                         return ret;
1882
1883                 /* clear wake-up status */
1884                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1885                 if (ret < 0)
1886                         return ret;
1887
1888                 val &= ~PM_CTL_WOL_EN_;
1889                 val |= PM_CTL_WUPS_;
1890
1891                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1892                 if (ret < 0)
1893                         return ret;
1894         }
1895
1896         ret = usbnet_resume(intf);
1897         if (ret < 0)
1898                 netdev_warn(dev->net, "usbnet_resume error\n");
1899
1900         return ret;
1901 }
1902
1903 static int smsc95xx_reset_resume(struct usb_interface *intf)
1904 {
1905         struct usbnet *dev = usb_get_intfdata(intf);
1906         int ret;
1907
1908         ret = smsc95xx_reset(dev);
1909         if (ret < 0)
1910                 return ret;
1911
1912         return smsc95xx_resume(intf);
1913 }
1914
1915 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1916 {
1917         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1918         skb->ip_summed = CHECKSUM_COMPLETE;
1919         skb_trim(skb, skb->len - 2);
1920 }
1921
1922 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1923 {
1924         /* This check is no longer done by usbnet */
1925         if (skb->len < dev->net->hard_header_len)
1926                 return 0;
1927
1928         while (skb->len > 0) {
1929                 u32 header, align_count;
1930                 struct sk_buff *ax_skb;
1931                 unsigned char *packet;
1932                 u16 size;
1933
1934                 memcpy(&header, skb->data, sizeof(header));
1935                 le32_to_cpus(&header);
1936                 skb_pull(skb, 4 + NET_IP_ALIGN);
1937                 packet = skb->data;
1938
1939                 /* get the packet length */
1940                 size = (u16)((header & RX_STS_FL_) >> 16);
1941                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1942
1943                 if (unlikely(header & RX_STS_ES_)) {
1944                         netif_dbg(dev, rx_err, dev->net,
1945                                   "Error header=0x%08x\n", header);
1946                         dev->net->stats.rx_errors++;
1947                         dev->net->stats.rx_dropped++;
1948
1949                         if (header & RX_STS_CRC_) {
1950                                 dev->net->stats.rx_crc_errors++;
1951                         } else {
1952                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1953                                         dev->net->stats.rx_frame_errors++;
1954
1955                                 if ((header & RX_STS_LE_) &&
1956                                         (!(header & RX_STS_FT_)))
1957                                         dev->net->stats.rx_length_errors++;
1958                         }
1959                 } else {
1960                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1961                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1962                                 netif_dbg(dev, rx_err, dev->net,
1963                                           "size err header=0x%08x\n", header);
1964                                 return 0;
1965                         }
1966
1967                         /* last frame in this batch */
1968                         if (skb->len == size) {
1969                                 if (dev->net->features & NETIF_F_RXCSUM)
1970                                         smsc95xx_rx_csum_offload(skb);
1971                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1972                                 skb->truesize = size + sizeof(struct sk_buff);
1973
1974                                 return 1;
1975                         }
1976
1977                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1978                         if (unlikely(!ax_skb)) {
1979                                 netdev_warn(dev->net, "Error allocating skb\n");
1980                                 return 0;
1981                         }
1982
1983                         ax_skb->len = size;
1984                         ax_skb->data = packet;
1985                         skb_set_tail_pointer(ax_skb, size);
1986
1987                         if (dev->net->features & NETIF_F_RXCSUM)
1988                                 smsc95xx_rx_csum_offload(ax_skb);
1989                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1990                         ax_skb->truesize = size + sizeof(struct sk_buff);
1991
1992                         usbnet_skb_return(dev, ax_skb);
1993                 }
1994
1995                 skb_pull(skb, size);
1996
1997                 /* padding bytes before the next frame starts */
1998                 if (skb->len)
1999                         skb_pull(skb, align_count);
2000         }
2001
2002         return 1;
2003 }
2004
2005 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
2006 {
2007         u16 low_16 = (u16)skb_checksum_start_offset(skb);
2008         u16 high_16 = low_16 + skb->csum_offset;
2009         return (high_16 << 16) | low_16;
2010 }
2011
2012 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
2013                                          struct sk_buff *skb, gfp_t flags)
2014 {
2015         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2016         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2017         u32 tx_cmd_a, tx_cmd_b;
2018
2019         /* We do not advertise SG, so skbs should be already linearized */
2020         BUG_ON(skb_shinfo(skb)->nr_frags);
2021
2022         /* Make writable and expand header space by overhead if required */
2023         if (skb_cow_head(skb, overhead)) {
2024                 /* Must deallocate here as returning NULL to indicate error
2025                  * means the skb won't be deallocated in the caller.
2026                  */
2027                 dev_kfree_skb_any(skb);
2028                 return NULL;
2029         }
2030
2031         if (csum) {
2032                 if (skb->len <= 45) {
2033                         /* workaround - hardware tx checksum does not work
2034                          * properly with extremely small packets */
2035                         long csstart = skb_checksum_start_offset(skb);
2036                         __wsum calc = csum_partial(skb->data + csstart,
2037                                 skb->len - csstart, 0);
2038                         *((__sum16 *)(skb->data + csstart
2039                                 + skb->csum_offset)) = csum_fold(calc);
2040
2041                         csum = false;
2042                 } else {
2043                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2044                         skb_push(skb, 4);
2045                         cpu_to_le32s(&csum_preamble);
2046                         memcpy(skb->data, &csum_preamble, 4);
2047                 }
2048         }
2049
2050         skb_push(skb, 4);
2051         tx_cmd_b = (u32)(skb->len - 4);
2052         if (csum)
2053                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2054         cpu_to_le32s(&tx_cmd_b);
2055         memcpy(skb->data, &tx_cmd_b, 4);
2056
2057         skb_push(skb, 4);
2058         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2059                 TX_CMD_A_LAST_SEG_;
2060         cpu_to_le32s(&tx_cmd_a);
2061         memcpy(skb->data, &tx_cmd_a, 4);
2062
2063         return skb;
2064 }
2065
2066 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2067 {
2068         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2069
2070         dev->intf->needs_remote_wakeup = on;
2071
2072         if (pdata->features & FEATURE_REMOTE_WAKEUP)
2073                 return 0;
2074
2075         /* this chip revision isn't capable of remote wakeup */
2076         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2077
2078         if (on)
2079                 usb_autopm_get_interface_no_resume(dev->intf);
2080         else
2081                 usb_autopm_put_interface(dev->intf);
2082
2083         return 0;
2084 }
2085
2086 static const struct driver_info smsc95xx_info = {
2087         .description    = "smsc95xx USB 2.0 Ethernet",
2088         .bind           = smsc95xx_bind,
2089         .unbind         = smsc95xx_unbind,
2090         .link_reset     = smsc95xx_link_reset,
2091         .reset          = smsc95xx_reset,
2092         .rx_fixup       = smsc95xx_rx_fixup,
2093         .tx_fixup       = smsc95xx_tx_fixup,
2094         .status         = smsc95xx_status,
2095         .manage_power   = smsc95xx_manage_power,
2096         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2097 };
2098
2099 static const struct usb_device_id products[] = {
2100         {
2101                 /* SMSC9500 USB Ethernet Device */
2102                 USB_DEVICE(0x0424, 0x9500),
2103                 .driver_info = (unsigned long) &smsc95xx_info,
2104         },
2105         {
2106                 /* SMSC9505 USB Ethernet Device */
2107                 USB_DEVICE(0x0424, 0x9505),
2108                 .driver_info = (unsigned long) &smsc95xx_info,
2109         },
2110         {
2111                 /* SMSC9500A USB Ethernet Device */
2112                 USB_DEVICE(0x0424, 0x9E00),
2113                 .driver_info = (unsigned long) &smsc95xx_info,
2114         },
2115         {
2116                 /* SMSC9505A USB Ethernet Device */
2117                 USB_DEVICE(0x0424, 0x9E01),
2118                 .driver_info = (unsigned long) &smsc95xx_info,
2119         },
2120         {
2121                 /* SMSC9512/9514 USB Hub & Ethernet Device */
2122                 USB_DEVICE(0x0424, 0xec00),
2123                 .driver_info = (unsigned long) &smsc95xx_info,
2124         },
2125         {
2126                 /* SMSC9500 USB Ethernet Device (SAL10) */
2127                 USB_DEVICE(0x0424, 0x9900),
2128                 .driver_info = (unsigned long) &smsc95xx_info,
2129         },
2130         {
2131                 /* SMSC9505 USB Ethernet Device (SAL10) */
2132                 USB_DEVICE(0x0424, 0x9901),
2133                 .driver_info = (unsigned long) &smsc95xx_info,
2134         },
2135         {
2136                 /* SMSC9500A USB Ethernet Device (SAL10) */
2137                 USB_DEVICE(0x0424, 0x9902),
2138                 .driver_info = (unsigned long) &smsc95xx_info,
2139         },
2140         {
2141                 /* SMSC9505A USB Ethernet Device (SAL10) */
2142                 USB_DEVICE(0x0424, 0x9903),
2143                 .driver_info = (unsigned long) &smsc95xx_info,
2144         },
2145         {
2146                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2147                 USB_DEVICE(0x0424, 0x9904),
2148                 .driver_info = (unsigned long) &smsc95xx_info,
2149         },
2150         {
2151                 /* SMSC9500A USB Ethernet Device (HAL) */
2152                 USB_DEVICE(0x0424, 0x9905),
2153                 .driver_info = (unsigned long) &smsc95xx_info,
2154         },
2155         {
2156                 /* SMSC9505A USB Ethernet Device (HAL) */
2157                 USB_DEVICE(0x0424, 0x9906),
2158                 .driver_info = (unsigned long) &smsc95xx_info,
2159         },
2160         {
2161                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2162                 USB_DEVICE(0x0424, 0x9907),
2163                 .driver_info = (unsigned long) &smsc95xx_info,
2164         },
2165         {
2166                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2167                 USB_DEVICE(0x0424, 0x9908),
2168                 .driver_info = (unsigned long) &smsc95xx_info,
2169         },
2170         {
2171                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2172                 USB_DEVICE(0x0424, 0x9909),
2173                 .driver_info = (unsigned long) &smsc95xx_info,
2174         },
2175         {
2176                 /* SMSC LAN9530 USB Ethernet Device */
2177                 USB_DEVICE(0x0424, 0x9530),
2178                 .driver_info = (unsigned long) &smsc95xx_info,
2179         },
2180         {
2181                 /* SMSC LAN9730 USB Ethernet Device */
2182                 USB_DEVICE(0x0424, 0x9730),
2183                 .driver_info = (unsigned long) &smsc95xx_info,
2184         },
2185         {
2186                 /* SMSC LAN89530 USB Ethernet Device */
2187                 USB_DEVICE(0x0424, 0x9E08),
2188                 .driver_info = (unsigned long) &smsc95xx_info,
2189         },
2190         { },            /* END */
2191 };
2192 MODULE_DEVICE_TABLE(usb, products);
2193
2194 static struct usb_driver smsc95xx_driver = {
2195         .name           = "smsc95xx",
2196         .id_table       = products,
2197         .probe          = usbnet_probe,
2198         .suspend        = smsc95xx_suspend,
2199         .resume         = smsc95xx_resume,
2200         .reset_resume   = smsc95xx_reset_resume,
2201         .disconnect     = usbnet_disconnect,
2202         .disable_hub_initiated_lpm = 1,
2203         .supports_autosuspend = 1,
2204 };
2205
2206 module_usb_driver(smsc95xx_driver);
2207
2208 MODULE_AUTHOR("Nancy Lin");
2209 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2210 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2211 MODULE_LICENSE("GPL");