Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/net/usb/smsc75xx.c

  1  /***************************************************************************
  2  *
  3  * Copyright (C) 2007-2010 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 "smsc75xx.h"
 33 
 34 #define SMSC_CHIPNAME                   "smsc75xx"
 35 #define SMSC_DRIVER_VERSION             "1.0.0"
 36 #define HS_USB_PKT_SIZE                 (512)
 37 #define FS_USB_PKT_SIZE                 (64)
 38 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
 39 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
 40 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
 41 #define MAX_SINGLE_PACKET_SIZE          (9000)
 42 #define LAN75XX_EEPROM_MAGIC            (0x7500)
 43 #define EEPROM_MAC_OFFSET               (0x01)
 44 #define DEFAULT_TX_CSUM_ENABLE          (true)
 45 #define DEFAULT_RX_CSUM_ENABLE          (true)
 46 #define SMSC75XX_INTERNAL_PHY_ID        (1)
 47 #define SMSC75XX_TX_OVERHEAD            (8)
 48 #define MAX_RX_FIFO_SIZE                (20 * 1024)
 49 #define MAX_TX_FIFO_SIZE                (12 * 1024)
 50 #define USB_VENDOR_ID_SMSC              (0x0424)
 51 #define USB_PRODUCT_ID_LAN7500          (0x7500)
 52 #define USB_PRODUCT_ID_LAN7505          (0x7505)
 53 #define RXW_PADDING                     2
 54 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
 55                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
 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 struct smsc75xx_priv {
 65         struct usbnet *dev;
 66         u32 rfe_ctl;
 67         u32 wolopts;
 68         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
 69         struct mutex dataport_mutex;
 70         spinlock_t rfe_ctl_lock;
 71         struct work_struct set_multicast;
 72         u8 suspend_flags;
 73 };
 74 
 75 struct usb_context {
 76         struct usb_ctrlrequest req;
 77         struct usbnet *dev;
 78 };
 79 
 80 static bool turbo_mode = true;
 81 module_param(turbo_mode, bool, 0644);
 82 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
 83 
 84 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
 85                                             u32 *data, int in_pm)
 86 {
 87         u32 buf;
 88         int ret;
 89         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
 90 
 91         BUG_ON(!dev);
 92 
 93         if (!in_pm)
 94                 fn = usbnet_read_cmd;
 95         else
 96                 fn = usbnet_read_cmd_nopm;
 97 
 98         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 99                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
100                  0, index, &buf, 4);
101         if (unlikely(ret < 0))
102                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
103                             index, ret);
104 
105         le32_to_cpus(&buf);
106         *data = buf;
107 
108         return ret;
109 }
110 
111 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
112                                              u32 data, int in_pm)
113 {
114         u32 buf;
115         int ret;
116         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
117 
118         BUG_ON(!dev);
119 
120         if (!in_pm)
121                 fn = usbnet_write_cmd;
122         else
123                 fn = usbnet_write_cmd_nopm;
124 
125         buf = data;
126         cpu_to_le32s(&buf);
127 
128         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
129                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
130                  0, index, &buf, 4);
131         if (unlikely(ret < 0))
132                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
133                             index, ret);
134 
135         return ret;
136 }
137 
138 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
139                                                u32 *data)
140 {
141         return __smsc75xx_read_reg(dev, index, data, 1);
142 }
143 
144 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
145                                                 u32 data)
146 {
147         return __smsc75xx_write_reg(dev, index, data, 1);
148 }
149 
150 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
151                                           u32 *data)
152 {
153         return __smsc75xx_read_reg(dev, index, data, 0);
154 }
155 
156 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
157                                            u32 data)
158 {
159         return __smsc75xx_write_reg(dev, index, data, 0);
160 }
161 
162 /* Loop until the read is completed with timeout
163  * called with phy_mutex held */
164 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
165                                                      int in_pm)
166 {
167         unsigned long start_time = jiffies;
168         u32 val;
169         int ret;
170 
171         do {
172                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
173                 if (ret < 0) {
174                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
175                         return ret;
176                 }
177 
178                 if (!(val & MII_ACCESS_BUSY))
179                         return 0;
180         } while (!time_after(jiffies, start_time + HZ));
181 
182         return -EIO;
183 }
184 
185 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
186                                 int in_pm)
187 {
188         struct usbnet *dev = netdev_priv(netdev);
189         u32 val, addr;
190         int ret;
191 
192         mutex_lock(&dev->phy_mutex);
193 
194         /* confirm MII not busy */
195         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
196         if (ret < 0) {
197                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
198                 goto done;
199         }
200 
201         /* set the address, index & direction (read from PHY) */
202         phy_id &= dev->mii.phy_id_mask;
203         idx &= dev->mii.reg_num_mask;
204         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
205                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
206                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
207         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
208         if (ret < 0) {
209                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
210                 goto done;
211         }
212 
213         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
214         if (ret < 0) {
215                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
216                 goto done;
217         }
218 
219         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
220         if (ret < 0) {
221                 netdev_warn(dev->net, "Error reading MII_DATA\n");
222                 goto done;
223         }
224 
225         ret = (u16)(val & 0xFFFF);
226 
227 done:
228         mutex_unlock(&dev->phy_mutex);
229         return ret;
230 }
231 
232 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
233                                   int idx, int regval, int in_pm)
234 {
235         struct usbnet *dev = netdev_priv(netdev);
236         u32 val, addr;
237         int ret;
238 
239         mutex_lock(&dev->phy_mutex);
240 
241         /* confirm MII not busy */
242         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
243         if (ret < 0) {
244                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
245                 goto done;
246         }
247 
248         val = regval;
249         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
250         if (ret < 0) {
251                 netdev_warn(dev->net, "Error writing MII_DATA\n");
252                 goto done;
253         }
254 
255         /* set the address, index & direction (write to PHY) */
256         phy_id &= dev->mii.phy_id_mask;
257         idx &= dev->mii.reg_num_mask;
258         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
259                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
260                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
261         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
262         if (ret < 0) {
263                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
264                 goto done;
265         }
266 
267         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
268         if (ret < 0) {
269                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
270                 goto done;
271         }
272 
273 done:
274         mutex_unlock(&dev->phy_mutex);
275 }
276 
277 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
278                                    int idx)
279 {
280         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
281 }
282 
283 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
284                                      int idx, int regval)
285 {
286         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
287 }
288 
289 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
290 {
291         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
292 }
293 
294 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
295                                 int regval)
296 {
297         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
298 }
299 
300 static int smsc75xx_wait_eeprom(struct usbnet *dev)
301 {
302         unsigned long start_time = jiffies;
303         u32 val;
304         int ret;
305 
306         do {
307                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
308                 if (ret < 0) {
309                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
310                         return ret;
311                 }
312 
313                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
314                         break;
315                 udelay(40);
316         } while (!time_after(jiffies, start_time + HZ));
317 
318         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
319                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
320                 return -EIO;
321         }
322 
323         return 0;
324 }
325 
326 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
327 {
328         unsigned long start_time = jiffies;
329         u32 val;
330         int ret;
331 
332         do {
333                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
334                 if (ret < 0) {
335                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
336                         return ret;
337                 }
338 
339                 if (!(val & E2P_CMD_BUSY))
340                         return 0;
341 
342                 udelay(40);
343         } while (!time_after(jiffies, start_time + HZ));
344 
345         netdev_warn(dev->net, "EEPROM is busy\n");
346         return -EIO;
347 }
348 
349 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
350                                 u8 *data)
351 {
352         u32 val;
353         int i, ret;
354 
355         BUG_ON(!dev);
356         BUG_ON(!data);
357 
358         ret = smsc75xx_eeprom_confirm_not_busy(dev);
359         if (ret)
360                 return ret;
361 
362         for (i = 0; i < length; i++) {
363                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
364                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
365                 if (ret < 0) {
366                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
367                         return ret;
368                 }
369 
370                 ret = smsc75xx_wait_eeprom(dev);
371                 if (ret < 0)
372                         return ret;
373 
374                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
375                 if (ret < 0) {
376                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
377                         return ret;
378                 }
379 
380                 data[i] = val & 0xFF;
381                 offset++;
382         }
383 
384         return 0;
385 }
386 
387 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
388                                  u8 *data)
389 {
390         u32 val;
391         int i, ret;
392 
393         BUG_ON(!dev);
394         BUG_ON(!data);
395 
396         ret = smsc75xx_eeprom_confirm_not_busy(dev);
397         if (ret)
398                 return ret;
399 
400         /* Issue write/erase enable command */
401         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
402         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
403         if (ret < 0) {
404                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
405                 return ret;
406         }
407 
408         ret = smsc75xx_wait_eeprom(dev);
409         if (ret < 0)
410                 return ret;
411 
412         for (i = 0; i < length; i++) {
413 
414                 /* Fill data register */
415                 val = data[i];
416                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
417                 if (ret < 0) {
418                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
419                         return ret;
420                 }
421 
422                 /* Send "write" command */
423                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
424                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
425                 if (ret < 0) {
426                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
427                         return ret;
428                 }
429 
430                 ret = smsc75xx_wait_eeprom(dev);
431                 if (ret < 0)
432                         return ret;
433 
434                 offset++;
435         }
436 
437         return 0;
438 }
439 
440 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
441 {
442         int i, ret;
443 
444         for (i = 0; i < 100; i++) {
445                 u32 dp_sel;
446                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
447                 if (ret < 0) {
448                         netdev_warn(dev->net, "Error reading DP_SEL\n");
449                         return ret;
450                 }
451 
452                 if (dp_sel & DP_SEL_DPRDY)
453                         return 0;
454 
455                 udelay(40);
456         }
457 
458         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
459 
460         return -EIO;
461 }
462 
463 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
464                                    u32 length, u32 *buf)
465 {
466         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
467         u32 dp_sel;
468         int i, ret;
469 
470         mutex_lock(&pdata->dataport_mutex);
471 
472         ret = smsc75xx_dataport_wait_not_busy(dev);
473         if (ret < 0) {
474                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
475                 goto done;
476         }
477 
478         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
479         if (ret < 0) {
480                 netdev_warn(dev->net, "Error reading DP_SEL\n");
481                 goto done;
482         }
483 
484         dp_sel &= ~DP_SEL_RSEL;
485         dp_sel |= ram_select;
486         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
487         if (ret < 0) {
488                 netdev_warn(dev->net, "Error writing DP_SEL\n");
489                 goto done;
490         }
491 
492         for (i = 0; i < length; i++) {
493                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
494                 if (ret < 0) {
495                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
496                         goto done;
497                 }
498 
499                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
500                 if (ret < 0) {
501                         netdev_warn(dev->net, "Error writing DP_DATA\n");
502                         goto done;
503                 }
504 
505                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
506                 if (ret < 0) {
507                         netdev_warn(dev->net, "Error writing DP_CMD\n");
508                         goto done;
509                 }
510 
511                 ret = smsc75xx_dataport_wait_not_busy(dev);
512                 if (ret < 0) {
513                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
514                         goto done;
515                 }
516         }
517 
518 done:
519         mutex_unlock(&pdata->dataport_mutex);
520         return ret;
521 }
522 
523 /* returns hash bit number for given MAC address */
524 static u32 smsc75xx_hash(char addr[ETH_ALEN])
525 {
526         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
527 }
528 
529 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
530 {
531         struct smsc75xx_priv *pdata =
532                 container_of(param, struct smsc75xx_priv, set_multicast);
533         struct usbnet *dev = pdata->dev;
534         int ret;
535 
536         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
537                   pdata->rfe_ctl);
538 
539         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
540                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
541 
542         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
543         if (ret < 0)
544                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
545 }
546 
547 static void smsc75xx_set_multicast(struct net_device *netdev)
548 {
549         struct usbnet *dev = netdev_priv(netdev);
550         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
551         unsigned long flags;
552         int i;
553 
554         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
555 
556         pdata->rfe_ctl &=
557                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
558         pdata->rfe_ctl |= RFE_CTL_AB;
559 
560         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
561                 pdata->multicast_hash_table[i] = 0;
562 
563         if (dev->net->flags & IFF_PROMISC) {
564                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
565                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
566         } else if (dev->net->flags & IFF_ALLMULTI) {
567                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
568                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
569         } else if (!netdev_mc_empty(dev->net)) {
570                 struct netdev_hw_addr *ha;
571 
572                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
573 
574                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
575 
576                 netdev_for_each_mc_addr(ha, netdev) {
577                         u32 bitnum = smsc75xx_hash(ha->addr);
578                         pdata->multicast_hash_table[bitnum / 32] |=
579                                 (1 << (bitnum % 32));
580                 }
581         } else {
582                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
583                 pdata->rfe_ctl |= RFE_CTL_DPF;
584         }
585 
586         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
587 
588         /* defer register writes to a sleepable context */
589         schedule_work(&pdata->set_multicast);
590 }
591 
592 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
593                                             u16 lcladv, u16 rmtadv)
594 {
595         u32 flow = 0, fct_flow = 0;
596         int ret;
597 
598         if (duplex == DUPLEX_FULL) {
599                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
600 
601                 if (cap & FLOW_CTRL_TX) {
602                         flow = (FLOW_TX_FCEN | 0xFFFF);
603                         /* set fct_flow thresholds to 20% and 80% */
604                         fct_flow = (8 << 8) | 32;
605                 }
606 
607                 if (cap & FLOW_CTRL_RX)
608                         flow |= FLOW_RX_FCEN;
609 
610                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
611                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
612                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
613         } else {
614                 netif_dbg(dev, link, dev->net, "half duplex\n");
615         }
616 
617         ret = smsc75xx_write_reg(dev, FLOW, flow);
618         if (ret < 0) {
619                 netdev_warn(dev->net, "Error writing FLOW\n");
620                 return ret;
621         }
622 
623         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
624         if (ret < 0) {
625                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
626                 return ret;
627         }
628 
629         return 0;
630 }
631 
632 static int smsc75xx_link_reset(struct usbnet *dev)
633 {
634         struct mii_if_info *mii = &dev->mii;
635         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
636         u16 lcladv, rmtadv;
637         int ret;
638 
639         /* write to clear phy interrupt status */
640         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
641                 PHY_INT_SRC_CLEAR_ALL);
642 
643         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
644         if (ret < 0) {
645                 netdev_warn(dev->net, "Error writing INT_STS\n");
646                 return ret;
647         }
648 
649         mii_check_media(mii, 1, 1);
650         mii_ethtool_gset(&dev->mii, &ecmd);
651         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
652         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
653 
654         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
655                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
656 
657         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
658 }
659 
660 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
661 {
662         u32 intdata;
663 
664         if (urb->actual_length != 4) {
665                 netdev_warn(dev->net, "unexpected urb length %d\n",
666                             urb->actual_length);
667                 return;
668         }
669 
670         memcpy(&intdata, urb->transfer_buffer, 4);
671         le32_to_cpus(&intdata);
672 
673         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
674 
675         if (intdata & INT_ENP_PHY_INT)
676                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
677         else
678                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
679                             intdata);
680 }
681 
682 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
683 {
684         return MAX_EEPROM_SIZE;
685 }
686 
687 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
688                                        struct ethtool_eeprom *ee, u8 *data)
689 {
690         struct usbnet *dev = netdev_priv(netdev);
691 
692         ee->magic = LAN75XX_EEPROM_MAGIC;
693 
694         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
695 }
696 
697 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
698                                        struct ethtool_eeprom *ee, u8 *data)
699 {
700         struct usbnet *dev = netdev_priv(netdev);
701 
702         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
703                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
704                             ee->magic);
705                 return -EINVAL;
706         }
707 
708         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
709 }
710 
711 static void smsc75xx_ethtool_get_wol(struct net_device *net,
712                                      struct ethtool_wolinfo *wolinfo)
713 {
714         struct usbnet *dev = netdev_priv(net);
715         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
716 
717         wolinfo->supported = SUPPORTED_WAKE;
718         wolinfo->wolopts = pdata->wolopts;
719 }
720 
721 static int smsc75xx_ethtool_set_wol(struct net_device *net,
722                                     struct ethtool_wolinfo *wolinfo)
723 {
724         struct usbnet *dev = netdev_priv(net);
725         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
726         int ret;
727 
728         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
729 
730         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
731         if (ret < 0)
732                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
733 
734         return ret;
735 }
736 
737 static const struct ethtool_ops smsc75xx_ethtool_ops = {
738         .get_link       = usbnet_get_link,
739         .nway_reset     = usbnet_nway_reset,
740         .get_drvinfo    = usbnet_get_drvinfo,
741         .get_msglevel   = usbnet_get_msglevel,
742         .set_msglevel   = usbnet_set_msglevel,
743         .get_settings   = usbnet_get_settings,
744         .set_settings   = usbnet_set_settings,
745         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
746         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
747         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
748         .get_wol        = smsc75xx_ethtool_get_wol,
749         .set_wol        = smsc75xx_ethtool_set_wol,
750 };
751 
752 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
753 {
754         struct usbnet *dev = netdev_priv(netdev);
755 
756         if (!netif_running(netdev))
757                 return -EINVAL;
758 
759         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
760 }
761 
762 static void smsc75xx_init_mac_address(struct usbnet *dev)
763 {
764         /* try reading mac address from EEPROM */
765         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
766                         dev->net->dev_addr) == 0) {
767                 if (is_valid_ether_addr(dev->net->dev_addr)) {
768                         /* eeprom values are valid so use them */
769                         netif_dbg(dev, ifup, dev->net,
770                                   "MAC address read from EEPROM\n");
771                         return;
772                 }
773         }
774 
775         /* no eeprom, or eeprom values are invalid. generate random MAC */
776         eth_hw_addr_random(dev->net);
777         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
778 }
779 
780 static int smsc75xx_set_mac_address(struct usbnet *dev)
781 {
782         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
783                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
784         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
785 
786         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
787         if (ret < 0) {
788                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
789                 return ret;
790         }
791 
792         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
793         if (ret < 0) {
794                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
795                 return ret;
796         }
797 
798         addr_hi |= ADDR_FILTX_FB_VALID;
799         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
800         if (ret < 0) {
801                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
802                 return ret;
803         }
804 
805         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
806         if (ret < 0)
807                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
808 
809         return ret;
810 }
811 
812 static int smsc75xx_phy_initialize(struct usbnet *dev)
813 {
814         int bmcr, ret, timeout = 0;
815 
816         /* Initialize MII structure */
817         dev->mii.dev = dev->net;
818         dev->mii.mdio_read = smsc75xx_mdio_read;
819         dev->mii.mdio_write = smsc75xx_mdio_write;
820         dev->mii.phy_id_mask = 0x1f;
821         dev->mii.reg_num_mask = 0x1f;
822         dev->mii.supports_gmii = 1;
823         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
824 
825         /* reset phy and wait for reset to complete */
826         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
827 
828         do {
829                 msleep(10);
830                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
831                 if (bmcr < 0) {
832                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
833                         return bmcr;
834                 }
835                 timeout++;
836         } while ((bmcr & BMCR_RESET) && (timeout < 100));
837 
838         if (timeout >= 100) {
839                 netdev_warn(dev->net, "timeout on PHY Reset\n");
840                 return -EIO;
841         }
842 
843         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
844                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
845                 ADVERTISE_PAUSE_ASYM);
846         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
847                 ADVERTISE_1000FULL);
848 
849         /* read and write to clear phy interrupt status */
850         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
851         if (ret < 0) {
852                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
853                 return ret;
854         }
855 
856         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
857 
858         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
859                 PHY_INT_MASK_DEFAULT);
860         mii_nway_restart(&dev->mii);
861 
862         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
863         return 0;
864 }
865 
866 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
867 {
868         int ret = 0;
869         u32 buf;
870         bool rxenabled;
871 
872         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
873         if (ret < 0) {
874                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
875                 return ret;
876         }
877 
878         rxenabled = ((buf & MAC_RX_RXEN) != 0);
879 
880         if (rxenabled) {
881                 buf &= ~MAC_RX_RXEN;
882                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
883                 if (ret < 0) {
884                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
885                         return ret;
886                 }
887         }
888 
889         /* add 4 to size for FCS */
890         buf &= ~MAC_RX_MAX_SIZE;
891         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
892 
893         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
894         if (ret < 0) {
895                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
896                 return ret;
897         }
898 
899         if (rxenabled) {
900                 buf |= MAC_RX_RXEN;
901                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
902                 if (ret < 0) {
903                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
904                         return ret;
905                 }
906         }
907 
908         return 0;
909 }
910 
911 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
912 {
913         struct usbnet *dev = netdev_priv(netdev);
914         int ret;
915 
916         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
917                 return -EINVAL;
918 
919         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
920         if (ret < 0) {
921                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
922                 return ret;
923         }
924 
925         return usbnet_change_mtu(netdev, new_mtu);
926 }
927 
928 /* Enable or disable Rx checksum offload engine */
929 static int smsc75xx_set_features(struct net_device *netdev,
930         netdev_features_t features)
931 {
932         struct usbnet *dev = netdev_priv(netdev);
933         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
934         unsigned long flags;
935         int ret;
936 
937         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
938 
939         if (features & NETIF_F_RXCSUM)
940                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
941         else
942                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
943 
944         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
945         /* it's racing here! */
946 
947         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
948         if (ret < 0)
949                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
950 
951         return ret;
952 }
953 
954 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
955 {
956         int timeout = 0;
957 
958         do {
959                 u32 buf;
960                 int ret;
961 
962                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
963 
964                 if (ret < 0) {
965                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
966                         return ret;
967                 }
968 
969                 if (buf & PMT_CTL_DEV_RDY)
970                         return 0;
971 
972                 msleep(10);
973                 timeout++;
974         } while (timeout < 100);
975 
976         netdev_warn(dev->net, "timeout waiting for device ready\n");
977         return -EIO;
978 }
979 
980 static int smsc75xx_reset(struct usbnet *dev)
981 {
982         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
983         u32 buf;
984         int ret = 0, timeout;
985 
986         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
987 
988         ret = smsc75xx_wait_ready(dev, 0);
989         if (ret < 0) {
990                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
991                 return ret;
992         }
993 
994         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
995         if (ret < 0) {
996                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
997                 return ret;
998         }
999 
1000         buf |= HW_CFG_LRST;
1001 
1002         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1003         if (ret < 0) {
1004                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1005                 return ret;
1006         }
1007 
1008         timeout = 0;
1009         do {
1010                 msleep(10);
1011                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1012                 if (ret < 0) {
1013                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1014                         return ret;
1015                 }
1016                 timeout++;
1017         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1018 
1019         if (timeout >= 100) {
1020                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1021                 return -EIO;
1022         }
1023 
1024         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1025 
1026         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1027         if (ret < 0) {
1028                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1029                 return ret;
1030         }
1031 
1032         buf |= PMT_CTL_PHY_RST;
1033 
1034         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1035         if (ret < 0) {
1036                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1037                 return ret;
1038         }
1039 
1040         timeout = 0;
1041         do {
1042                 msleep(10);
1043                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1044                 if (ret < 0) {
1045                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1046                         return ret;
1047                 }
1048                 timeout++;
1049         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1050 
1051         if (timeout >= 100) {
1052                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1053                 return -EIO;
1054         }
1055 
1056         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1057 
1058         ret = smsc75xx_set_mac_address(dev);
1059         if (ret < 0) {
1060                 netdev_warn(dev->net, "Failed to set mac address\n");
1061                 return ret;
1062         }
1063 
1064         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1065                   dev->net->dev_addr);
1066 
1067         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1068         if (ret < 0) {
1069                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1070                 return ret;
1071         }
1072 
1073         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1074                   buf);
1075 
1076         buf |= HW_CFG_BIR;
1077 
1078         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1079         if (ret < 0) {
1080                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1081                 return ret;
1082         }
1083 
1084         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1085         if (ret < 0) {
1086                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1087                 return ret;
1088         }
1089 
1090         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1091                   buf);
1092 
1093         if (!turbo_mode) {
1094                 buf = 0;
1095                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1096         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1097                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1098                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1099         } else {
1100                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1101                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1102         }
1103 
1104         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1105                   (ulong)dev->rx_urb_size);
1106 
1107         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1108         if (ret < 0) {
1109                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1110                 return ret;
1111         }
1112 
1113         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1114         if (ret < 0) {
1115                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1116                 return ret;
1117         }
1118 
1119         netif_dbg(dev, ifup, dev->net,
1120                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1121 
1122         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1123         if (ret < 0) {
1124                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1125                 return ret;
1126         }
1127 
1128         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1129         if (ret < 0) {
1130                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1131                 return ret;
1132         }
1133 
1134         netif_dbg(dev, ifup, dev->net,
1135                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1136 
1137         if (turbo_mode) {
1138                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1139                 if (ret < 0) {
1140                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1141                         return ret;
1142                 }
1143 
1144                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1145 
1146                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1147 
1148                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1149                 if (ret < 0) {
1150                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1151                         return ret;
1152                 }
1153 
1154                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1155                 if (ret < 0) {
1156                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1157                         return ret;
1158                 }
1159 
1160                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1161         }
1162 
1163         /* set FIFO sizes */
1164         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1165         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1166         if (ret < 0) {
1167                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1168                 return ret;
1169         }
1170 
1171         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1172 
1173         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1174         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1175         if (ret < 0) {
1176                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1177                 return ret;
1178         }
1179 
1180         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1181 
1182         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1183         if (ret < 0) {
1184                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1185                 return ret;
1186         }
1187 
1188         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1189         if (ret < 0) {
1190                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1191                 return ret;
1192         }
1193 
1194         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1195 
1196         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1197         if (ret < 0) {
1198                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1199                 return ret;
1200         }
1201 
1202         /* only set default GPIO/LED settings if no EEPROM is detected */
1203         if (!(buf & E2P_CMD_LOADED)) {
1204                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1205                 if (ret < 0) {
1206                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1207                         return ret;
1208                 }
1209 
1210                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1211                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1212 
1213                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1214                 if (ret < 0) {
1215                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1216                         return ret;
1217                 }
1218         }
1219 
1220         ret = smsc75xx_write_reg(dev, FLOW, 0);
1221         if (ret < 0) {
1222                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1223                 return ret;
1224         }
1225 
1226         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1227         if (ret < 0) {
1228                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1229                 return ret;
1230         }
1231 
1232         /* Don't need rfe_ctl_lock during initialisation */
1233         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1234         if (ret < 0) {
1235                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1236                 return ret;
1237         }
1238 
1239         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1240 
1241         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1242         if (ret < 0) {
1243                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1244                 return ret;
1245         }
1246 
1247         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1248         if (ret < 0) {
1249                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1250                 return ret;
1251         }
1252 
1253         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1254                   pdata->rfe_ctl);
1255 
1256         /* Enable or disable checksum offload engines */
1257         smsc75xx_set_features(dev->net, dev->net->features);
1258 
1259         smsc75xx_set_multicast(dev->net);
1260 
1261         ret = smsc75xx_phy_initialize(dev);
1262         if (ret < 0) {
1263                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1264                 return ret;
1265         }
1266 
1267         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1268         if (ret < 0) {
1269                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1270                 return ret;
1271         }
1272 
1273         /* enable PHY interrupts */
1274         buf |= INT_ENP_PHY_INT;
1275 
1276         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1277         if (ret < 0) {
1278                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1279                 return ret;
1280         }
1281 
1282         /* allow mac to detect speed and duplex from phy */
1283         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1284         if (ret < 0) {
1285                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1286                 return ret;
1287         }
1288 
1289         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1290         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1291         if (ret < 0) {
1292                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1293                 return ret;
1294         }
1295 
1296         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1297         if (ret < 0) {
1298                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1299                 return ret;
1300         }
1301 
1302         buf |= MAC_TX_TXEN;
1303 
1304         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1305         if (ret < 0) {
1306                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1307                 return ret;
1308         }
1309 
1310         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1311 
1312         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1313         if (ret < 0) {
1314                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1315                 return ret;
1316         }
1317 
1318         buf |= FCT_TX_CTL_EN;
1319 
1320         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1321         if (ret < 0) {
1322                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1323                 return ret;
1324         }
1325 
1326         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1327 
1328         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1329         if (ret < 0) {
1330                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1331                 return ret;
1332         }
1333 
1334         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1335         if (ret < 0) {
1336                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1337                 return ret;
1338         }
1339 
1340         buf |= MAC_RX_RXEN;
1341 
1342         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1343         if (ret < 0) {
1344                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1345                 return ret;
1346         }
1347 
1348         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1349 
1350         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1351         if (ret < 0) {
1352                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1353                 return ret;
1354         }
1355 
1356         buf |= FCT_RX_CTL_EN;
1357 
1358         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1359         if (ret < 0) {
1360                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1361                 return ret;
1362         }
1363 
1364         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1365 
1366         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1367         return 0;
1368 }
1369 
1370 static const struct net_device_ops smsc75xx_netdev_ops = {
1371         .ndo_open               = usbnet_open,
1372         .ndo_stop               = usbnet_stop,
1373         .ndo_start_xmit         = usbnet_start_xmit,
1374         .ndo_tx_timeout         = usbnet_tx_timeout,
1375         .ndo_change_mtu         = smsc75xx_change_mtu,
1376         .ndo_set_mac_address    = eth_mac_addr,
1377         .ndo_validate_addr      = eth_validate_addr,
1378         .ndo_do_ioctl           = smsc75xx_ioctl,
1379         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1380         .ndo_set_features       = smsc75xx_set_features,
1381 };
1382 
1383 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1384 {
1385         struct smsc75xx_priv *pdata = NULL;
1386         int ret;
1387 
1388         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1389 
1390         ret = usbnet_get_endpoints(dev, intf);
1391         if (ret < 0) {
1392                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1393                 return ret;
1394         }
1395 
1396         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1397                                               GFP_KERNEL);
1398 
1399         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1400         if (!pdata)
1401                 return -ENOMEM;
1402 
1403         pdata->dev = dev;
1404 
1405         spin_lock_init(&pdata->rfe_ctl_lock);
1406         mutex_init(&pdata->dataport_mutex);
1407 
1408         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1409 
1410         if (DEFAULT_TX_CSUM_ENABLE)
1411                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1412 
1413         if (DEFAULT_RX_CSUM_ENABLE)
1414                 dev->net->features |= NETIF_F_RXCSUM;
1415 
1416         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1417                                 NETIF_F_RXCSUM;
1418 
1419         ret = smsc75xx_wait_ready(dev, 0);
1420         if (ret < 0) {
1421                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1422                 return ret;
1423         }
1424 
1425         smsc75xx_init_mac_address(dev);
1426 
1427         /* Init all registers */
1428         ret = smsc75xx_reset(dev);
1429         if (ret < 0) {
1430                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1431                 return ret;
1432         }
1433 
1434         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1435         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1436         dev->net->flags |= IFF_MULTICAST;
1437         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1438         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1439         return 0;
1440 }
1441 
1442 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1443 {
1444         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1445         if (pdata) {
1446                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1447                 kfree(pdata);
1448                 pdata = NULL;
1449                 dev->data[0] = 0;
1450         }
1451 }
1452 
1453 static u16 smsc_crc(const u8 *buffer, size_t len)
1454 {
1455         return bitrev16(crc16(0xFFFF, buffer, len));
1456 }
1457 
1458 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1459                                u32 wuf_mask1)
1460 {
1461         int cfg_base = WUF_CFGX + filter * 4;
1462         int mask_base = WUF_MASKX + filter * 16;
1463         int ret;
1464 
1465         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1466         if (ret < 0) {
1467                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1468                 return ret;
1469         }
1470 
1471         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1472         if (ret < 0) {
1473                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1474                 return ret;
1475         }
1476 
1477         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1478         if (ret < 0) {
1479                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1480                 return ret;
1481         }
1482 
1483         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1484         if (ret < 0) {
1485                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1486                 return ret;
1487         }
1488 
1489         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1490         if (ret < 0) {
1491                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1492                 return ret;
1493         }
1494 
1495         return 0;
1496 }
1497 
1498 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1499 {
1500         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1501         u32 val;
1502         int ret;
1503 
1504         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1505         if (ret < 0) {
1506                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1507                 return ret;
1508         }
1509 
1510         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1511         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1512 
1513         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1514         if (ret < 0) {
1515                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1516                 return ret;
1517         }
1518 
1519         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1520 
1521         return 0;
1522 }
1523 
1524 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1525 {
1526         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1527         u32 val;
1528         int ret;
1529 
1530         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1531         if (ret < 0) {
1532                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1533                 return ret;
1534         }
1535 
1536         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1537         val |= PMT_CTL_SUS_MODE_1;
1538 
1539         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1540         if (ret < 0) {
1541                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1542                 return ret;
1543         }
1544 
1545         /* clear wol status, enable energy detection */
1546         val &= ~PMT_CTL_WUPS;
1547         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1548 
1549         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1550         if (ret < 0) {
1551                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1552                 return ret;
1553         }
1554 
1555         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1556 
1557         return 0;
1558 }
1559 
1560 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1561 {
1562         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1563         u32 val;
1564         int ret;
1565 
1566         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1567         if (ret < 0) {
1568                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1569                 return ret;
1570         }
1571 
1572         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1573         val |= PMT_CTL_SUS_MODE_2;
1574 
1575         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1576         if (ret < 0) {
1577                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1578                 return ret;
1579         }
1580 
1581         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1582 
1583         return 0;
1584 }
1585 
1586 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1587 {
1588         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1589         u32 val;
1590         int ret;
1591 
1592         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1593         if (ret < 0) {
1594                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1595                 return ret;
1596         }
1597 
1598         if (val & FCT_RX_CTL_RXUSED) {
1599                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1600                 return -EBUSY;
1601         }
1602 
1603         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1604         if (ret < 0) {
1605                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1606                 return ret;
1607         }
1608 
1609         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1610         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1611 
1612         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1613         if (ret < 0) {
1614                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1615                 return ret;
1616         }
1617 
1618         /* clear wol status */
1619         val &= ~PMT_CTL_WUPS;
1620         val |= PMT_CTL_WUPS_WOL;
1621 
1622         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1623         if (ret < 0) {
1624                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1625                 return ret;
1626         }
1627 
1628         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1629 
1630         return 0;
1631 }
1632 
1633 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1634 {
1635         struct mii_if_info *mii = &dev->mii;
1636         int ret;
1637 
1638         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1639 
1640         /* read to clear */
1641         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1642         if (ret < 0) {
1643                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1644                 return ret;
1645         }
1646 
1647         /* enable interrupt source */
1648         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1649         if (ret < 0) {
1650                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1651                 return ret;
1652         }
1653 
1654         ret |= mask;
1655 
1656         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1657 
1658         return 0;
1659 }
1660 
1661 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1662 {
1663         struct mii_if_info *mii = &dev->mii;
1664         int ret;
1665 
1666         /* first, a dummy read, needed to latch some MII phys */
1667         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1668         if (ret < 0) {
1669                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1670                 return ret;
1671         }
1672 
1673         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1674         if (ret < 0) {
1675                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1676                 return ret;
1677         }
1678 
1679         return !!(ret & BMSR_LSTATUS);
1680 }
1681 
1682 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1683 {
1684         int ret;
1685 
1686         if (!netif_running(dev->net)) {
1687                 /* interface is ifconfig down so fully power down hw */
1688                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1689                 return smsc75xx_enter_suspend2(dev);
1690         }
1691 
1692         if (!link_up) {
1693                 /* link is down so enter EDPD mode */
1694                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1695 
1696                 /* enable PHY wakeup events for if cable is attached */
1697                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1698                         PHY_INT_MASK_ANEG_COMP);
1699                 if (ret < 0) {
1700                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1701                         return ret;
1702                 }
1703 
1704                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1705                 return smsc75xx_enter_suspend1(dev);
1706         }
1707 
1708         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1709         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1710                 PHY_INT_MASK_LINK_DOWN);
1711         if (ret < 0) {
1712                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1713                 return ret;
1714         }
1715 
1716         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1717         return smsc75xx_enter_suspend3(dev);
1718 }
1719 
1720 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1721 {
1722         struct usbnet *dev = usb_get_intfdata(intf);
1723         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1724         u32 val, link_up;
1725         int ret;
1726 
1727         ret = usbnet_suspend(intf, message);
1728         if (ret < 0) {
1729                 netdev_warn(dev->net, "usbnet_suspend error\n");
1730                 return ret;
1731         }
1732 
1733         if (pdata->suspend_flags) {
1734                 netdev_warn(dev->net, "error during last resume\n");
1735                 pdata->suspend_flags = 0;
1736         }
1737 
1738         /* determine if link is up using only _nopm functions */
1739         link_up = smsc75xx_link_ok_nopm(dev);
1740 
1741         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1742                 ret = smsc75xx_autosuspend(dev, link_up);
1743                 goto done;
1744         }
1745 
1746         /* if we get this far we're not autosuspending */
1747         /* if no wol options set, or if link is down and we're not waking on
1748          * PHY activity, enter lowest power SUSPEND2 mode
1749          */
1750         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1751                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1752                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1753 
1754                 /* disable energy detect (link up) & wake up events */
1755                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1756                 if (ret < 0) {
1757                         netdev_warn(dev->net, "Error reading WUCSR\n");
1758                         goto done;
1759                 }
1760 
1761                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1762 
1763                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1764                 if (ret < 0) {
1765                         netdev_warn(dev->net, "Error writing WUCSR\n");
1766                         goto done;
1767                 }
1768 
1769                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1770                 if (ret < 0) {
1771                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1772                         goto done;
1773                 }
1774 
1775                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1776 
1777                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1778                 if (ret < 0) {
1779                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1780                         goto done;
1781                 }
1782 
1783                 ret = smsc75xx_enter_suspend2(dev);
1784                 goto done;
1785         }
1786 
1787         if (pdata->wolopts & WAKE_PHY) {
1788                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1789                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1790                 if (ret < 0) {
1791                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1792                         goto done;
1793                 }
1794 
1795                 /* if link is down then configure EDPD and enter SUSPEND1,
1796                  * otherwise enter SUSPEND0 below
1797                  */
1798                 if (!link_up) {
1799                         struct mii_if_info *mii = &dev->mii;
1800                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1801 
1802                         /* enable energy detect power-down mode */
1803                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1804                                 PHY_MODE_CTRL_STS);
1805                         if (ret < 0) {
1806                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1807                                 goto done;
1808                         }
1809 
1810                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1811 
1812                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1813                                 PHY_MODE_CTRL_STS, ret);
1814 
1815                         /* enter SUSPEND1 mode */
1816                         ret = smsc75xx_enter_suspend1(dev);
1817                         goto done;
1818                 }
1819         }
1820 
1821         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1822                 int i, filter = 0;
1823 
1824                 /* disable all filters */
1825                 for (i = 0; i < WUF_NUM; i++) {
1826                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1827                         if (ret < 0) {
1828                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1829                                 goto done;
1830                         }
1831                 }
1832 
1833                 if (pdata->wolopts & WAKE_MCAST) {
1834                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1835                         netdev_info(dev->net, "enabling multicast detection\n");
1836 
1837                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1838                                 | smsc_crc(mcast, 3);
1839                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1840                         if (ret < 0) {
1841                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1842                                 goto done;
1843                         }
1844                 }
1845 
1846                 if (pdata->wolopts & WAKE_ARP) {
1847                         const u8 arp[] = {0x08, 0x06};
1848                         netdev_info(dev->net, "enabling ARP detection\n");
1849 
1850                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1851                                 | smsc_crc(arp, 2);
1852                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1853                         if (ret < 0) {
1854                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1855                                 goto done;
1856                         }
1857                 }
1858 
1859                 /* clear any pending pattern match packet status */
1860                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1861                 if (ret < 0) {
1862                         netdev_warn(dev->net, "Error reading WUCSR\n");
1863                         goto done;
1864                 }
1865 
1866                 val |= WUCSR_WUFR;
1867 
1868                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1869                 if (ret < 0) {
1870                         netdev_warn(dev->net, "Error writing WUCSR\n");
1871                         goto done;
1872                 }
1873 
1874                 netdev_info(dev->net, "enabling packet match detection\n");
1875                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1876                 if (ret < 0) {
1877                         netdev_warn(dev->net, "Error reading WUCSR\n");
1878                         goto done;
1879                 }
1880 
1881                 val |= WUCSR_WUEN;
1882 
1883                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1884                 if (ret < 0) {
1885                         netdev_warn(dev->net, "Error writing WUCSR\n");
1886                         goto done;
1887                 }
1888         } else {
1889                 netdev_info(dev->net, "disabling packet match detection\n");
1890                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1891                 if (ret < 0) {
1892                         netdev_warn(dev->net, "Error reading WUCSR\n");
1893                         goto done;
1894                 }
1895 
1896                 val &= ~WUCSR_WUEN;
1897 
1898                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1899                 if (ret < 0) {
1900                         netdev_warn(dev->net, "Error writing WUCSR\n");
1901                         goto done;
1902                 }
1903         }
1904 
1905         /* disable magic, bcast & unicast wakeup sources */
1906         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1907         if (ret < 0) {
1908                 netdev_warn(dev->net, "Error reading WUCSR\n");
1909                 goto done;
1910         }
1911 
1912         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1913 
1914         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1915         if (ret < 0) {
1916                 netdev_warn(dev->net, "Error writing WUCSR\n");
1917                 goto done;
1918         }
1919 
1920         if (pdata->wolopts & WAKE_PHY) {
1921                 netdev_info(dev->net, "enabling PHY wakeup\n");
1922 
1923                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1924                 if (ret < 0) {
1925                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1926                         goto done;
1927                 }
1928 
1929                 /* clear wol status, enable energy detection */
1930                 val &= ~PMT_CTL_WUPS;
1931                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1932 
1933                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1934                 if (ret < 0) {
1935                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1936                         goto done;
1937                 }
1938         }
1939 
1940         if (pdata->wolopts & WAKE_MAGIC) {
1941                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1942                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1943                 if (ret < 0) {
1944                         netdev_warn(dev->net, "Error reading WUCSR\n");
1945                         goto done;
1946                 }
1947 
1948                 /* clear any pending magic packet status */
1949                 val |= WUCSR_MPR | WUCSR_MPEN;
1950 
1951                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1952                 if (ret < 0) {
1953                         netdev_warn(dev->net, "Error writing WUCSR\n");
1954                         goto done;
1955                 }
1956         }
1957 
1958         if (pdata->wolopts & WAKE_BCAST) {
1959                 netdev_info(dev->net, "enabling broadcast detection\n");
1960                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1961                 if (ret < 0) {
1962                         netdev_warn(dev->net, "Error reading WUCSR\n");
1963                         goto done;
1964                 }
1965 
1966                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1967 
1968                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1969                 if (ret < 0) {
1970                         netdev_warn(dev->net, "Error writing WUCSR\n");
1971                         goto done;
1972                 }
1973         }
1974 
1975         if (pdata->wolopts & WAKE_UCAST) {
1976                 netdev_info(dev->net, "enabling unicast detection\n");
1977                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1978                 if (ret < 0) {
1979                         netdev_warn(dev->net, "Error reading WUCSR\n");
1980                         goto done;
1981                 }
1982 
1983                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1984 
1985                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1986                 if (ret < 0) {
1987                         netdev_warn(dev->net, "Error writing WUCSR\n");
1988                         goto done;
1989                 }
1990         }
1991 
1992         /* enable receiver to enable frame reception */
1993         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1994         if (ret < 0) {
1995                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1996                 goto done;
1997         }
1998 
1999         val |= MAC_RX_RXEN;
2000 
2001         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2002         if (ret < 0) {
2003                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2004                 goto done;
2005         }
2006 
2007         /* some wol options are enabled, so enter SUSPEND0 */
2008         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2009         ret = smsc75xx_enter_suspend0(dev);
2010 
2011 done:
2012         /*
2013          * TODO: resume() might need to handle the suspend failure
2014          * in system sleep
2015          */
2016         if (ret && PMSG_IS_AUTO(message))
2017                 usbnet_resume(intf);
2018         return ret;
2019 }
2020 
2021 static int smsc75xx_resume(struct usb_interface *intf)
2022 {
2023         struct usbnet *dev = usb_get_intfdata(intf);
2024         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2025         u8 suspend_flags = pdata->suspend_flags;
2026         int ret;
2027         u32 val;
2028 
2029         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2030 
2031         /* do this first to ensure it's cleared even in error case */
2032         pdata->suspend_flags = 0;
2033 
2034         if (suspend_flags & SUSPEND_ALLMODES) {
2035                 /* Disable wakeup sources */
2036                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2037                 if (ret < 0) {
2038                         netdev_warn(dev->net, "Error reading WUCSR\n");
2039                         return ret;
2040                 }
2041 
2042                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2043                         | WUCSR_BCST_EN);
2044 
2045                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2046                 if (ret < 0) {
2047                         netdev_warn(dev->net, "Error writing WUCSR\n");
2048                         return ret;
2049                 }
2050 
2051                 /* clear wake-up status */
2052                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2053                 if (ret < 0) {
2054                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2055                         return ret;
2056                 }
2057 
2058                 val &= ~PMT_CTL_WOL_EN;
2059                 val |= PMT_CTL_WUPS;
2060 
2061                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2062                 if (ret < 0) {
2063                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2064                         return ret;
2065                 }
2066         }
2067 
2068         if (suspend_flags & SUSPEND_SUSPEND2) {
2069                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2070 
2071                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2072                 if (ret < 0) {
2073                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2074                         return ret;
2075                 }
2076 
2077                 val |= PMT_CTL_PHY_PWRUP;
2078 
2079                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2080                 if (ret < 0) {
2081                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2082                         return ret;
2083                 }
2084         }
2085 
2086         ret = smsc75xx_wait_ready(dev, 1);
2087         if (ret < 0) {
2088                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2089                 return ret;
2090         }
2091 
2092         return usbnet_resume(intf);
2093 }
2094 
2095 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2096                                      u32 rx_cmd_a, u32 rx_cmd_b)
2097 {
2098         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2099             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2100                 skb->ip_summed = CHECKSUM_NONE;
2101         } else {
2102                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2103                 skb->ip_summed = CHECKSUM_COMPLETE;
2104         }
2105 }
2106 
2107 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2108 {
2109         /* This check is no longer done by usbnet */
2110         if (skb->len < dev->net->hard_header_len)
2111                 return 0;
2112 
2113         while (skb->len > 0) {
2114                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2115                 struct sk_buff *ax_skb;
2116                 unsigned char *packet;
2117 
2118                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2119                 le32_to_cpus(&rx_cmd_a);
2120                 skb_pull(skb, 4);
2121 
2122                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2123                 le32_to_cpus(&rx_cmd_b);
2124                 skb_pull(skb, 4 + RXW_PADDING);
2125 
2126                 packet = skb->data;
2127 
2128                 /* get the packet length */
2129                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2130                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2131 
2132                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2133                         netif_dbg(dev, rx_err, dev->net,
2134                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2135                         dev->net->stats.rx_errors++;
2136                         dev->net->stats.rx_dropped++;
2137 
2138                         if (rx_cmd_a & RX_CMD_A_FCS)
2139                                 dev->net->stats.rx_crc_errors++;
2140                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2141                                 dev->net->stats.rx_frame_errors++;
2142                 } else {
2143                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2144                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2145                                 netif_dbg(dev, rx_err, dev->net,
2146                                           "size err rx_cmd_a=0x%08x\n",
2147                                           rx_cmd_a);
2148                                 return 0;
2149                         }
2150 
2151                         /* last frame in this batch */
2152                         if (skb->len == size) {
2153                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2154                                         rx_cmd_b);
2155 
2156                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2157                                 skb->truesize = size + sizeof(struct sk_buff);
2158 
2159                                 return 1;
2160                         }
2161 
2162                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2163                         if (unlikely(!ax_skb)) {
2164                                 netdev_warn(dev->net, "Error allocating skb\n");
2165                                 return 0;
2166                         }
2167 
2168                         ax_skb->len = size;
2169                         ax_skb->data = packet;
2170                         skb_set_tail_pointer(ax_skb, size);
2171 
2172                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2173                                 rx_cmd_b);
2174 
2175                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2176                         ax_skb->truesize = size + sizeof(struct sk_buff);
2177 
2178                         usbnet_skb_return(dev, ax_skb);
2179                 }
2180 
2181                 skb_pull(skb, size);
2182 
2183                 /* padding bytes before the next frame starts */
2184                 if (skb->len)
2185                         skb_pull(skb, align_count);
2186         }
2187 
2188         if (unlikely(skb->len < 0)) {
2189                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
2190                 return 0;
2191         }
2192 
2193         return 1;
2194 }
2195 
2196 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2197                                          struct sk_buff *skb, gfp_t flags)
2198 {
2199         u32 tx_cmd_a, tx_cmd_b;
2200 
2201         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2202                 struct sk_buff *skb2 =
2203                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2204                 dev_kfree_skb_any(skb);
2205                 skb = skb2;
2206                 if (!skb)
2207                         return NULL;
2208         }
2209 
2210         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2211 
2212         if (skb->ip_summed == CHECKSUM_PARTIAL)
2213                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2214 
2215         if (skb_is_gso(skb)) {
2216                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2217                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2218 
2219                 tx_cmd_a |= TX_CMD_A_LSO;
2220         } else {
2221                 tx_cmd_b = 0;
2222         }
2223 
2224         skb_push(skb, 4);
2225         cpu_to_le32s(&tx_cmd_b);
2226         memcpy(skb->data, &tx_cmd_b, 4);
2227 
2228         skb_push(skb, 4);
2229         cpu_to_le32s(&tx_cmd_a);
2230         memcpy(skb->data, &tx_cmd_a, 4);
2231 
2232         return skb;
2233 }
2234 
2235 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2236 {
2237         dev->intf->needs_remote_wakeup = on;
2238         return 0;
2239 }
2240 
2241 static const struct driver_info smsc75xx_info = {
2242         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2243         .bind           = smsc75xx_bind,
2244         .unbind         = smsc75xx_unbind,
2245         .link_reset     = smsc75xx_link_reset,
2246         .reset          = smsc75xx_reset,
2247         .rx_fixup       = smsc75xx_rx_fixup,
2248         .tx_fixup       = smsc75xx_tx_fixup,
2249         .status         = smsc75xx_status,
2250         .manage_power   = smsc75xx_manage_power,
2251         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2252 };
2253 
2254 static const struct usb_device_id products[] = {
2255         {
2256                 /* SMSC7500 USB Gigabit Ethernet Device */
2257                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2258                 .driver_info = (unsigned long) &smsc75xx_info,
2259         },
2260         {
2261                 /* SMSC7500 USB Gigabit Ethernet Device */
2262                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2263                 .driver_info = (unsigned long) &smsc75xx_info,
2264         },
2265         { },            /* END */
2266 };
2267 MODULE_DEVICE_TABLE(usb, products);
2268 
2269 static struct usb_driver smsc75xx_driver = {
2270         .name           = SMSC_CHIPNAME,
2271         .id_table       = products,
2272         .probe          = usbnet_probe,
2273         .suspend        = smsc75xx_suspend,
2274         .resume         = smsc75xx_resume,
2275         .reset_resume   = smsc75xx_resume,
2276         .disconnect     = usbnet_disconnect,
2277         .disable_hub_initiated_lpm = 1,
2278         .supports_autosuspend = 1,
2279 };
2280 
2281 module_usb_driver(smsc75xx_driver);
2282 
2283 MODULE_AUTHOR("Nancy Lin");
2284 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2285 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2286 MODULE_LICENSE("GPL");
2287 

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