Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

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 <linux/of_net.h>
 33 #include "smsc75xx.h"
 34 
 35 #define SMSC_CHIPNAME                   "smsc75xx"
 36 #define SMSC_DRIVER_VERSION             "1.0.0"
 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          (9000)
 43 #define LAN75XX_EEPROM_MAGIC            (0x7500)
 44 #define EEPROM_MAC_OFFSET               (0x01)
 45 #define DEFAULT_TX_CSUM_ENABLE          (true)
 46 #define DEFAULT_RX_CSUM_ENABLE          (true)
 47 #define SMSC75XX_INTERNAL_PHY_ID        (1)
 48 #define SMSC75XX_TX_OVERHEAD            (8)
 49 #define MAX_RX_FIFO_SIZE                (20 * 1024)
 50 #define MAX_TX_FIFO_SIZE                (12 * 1024)
 51 #define USB_VENDOR_ID_SMSC              (0x0424)
 52 #define USB_PRODUCT_ID_LAN7500          (0x7500)
 53 #define USB_PRODUCT_ID_LAN7505          (0x7505)
 54 #define RXW_PADDING                     2
 55 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
 56                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
 57 
 58 #define SUSPEND_SUSPEND0                (0x01)
 59 #define SUSPEND_SUSPEND1                (0x02)
 60 #define SUSPEND_SUSPEND2                (0x04)
 61 #define SUSPEND_SUSPEND3                (0x08)
 62 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
 63                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
 64 
 65 struct smsc75xx_priv {
 66         struct usbnet *dev;
 67         u32 rfe_ctl;
 68         u32 wolopts;
 69         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
 70         struct mutex dataport_mutex;
 71         spinlock_t rfe_ctl_lock;
 72         struct work_struct set_multicast;
 73         u8 suspend_flags;
 74 };
 75 
 76 struct usb_context {
 77         struct usb_ctrlrequest req;
 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 __smsc75xx_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 __smsc75xx_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 smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
142                                                u32 *data)
143 {
144         return __smsc75xx_read_reg(dev, index, data, 1);
145 }
146 
147 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
148                                                 u32 data)
149 {
150         return __smsc75xx_write_reg(dev, index, data, 1);
151 }
152 
153 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
154                                           u32 *data)
155 {
156         return __smsc75xx_read_reg(dev, index, data, 0);
157 }
158 
159 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
160                                            u32 data)
161 {
162         return __smsc75xx_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 __must_check int __smsc75xx_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 = __smsc75xx_read_reg(dev, MII_ACCESS, &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_ACCESS_BUSY))
182                         return 0;
183         } while (!time_after(jiffies, start_time + HZ));
184 
185         return -EIO;
186 }
187 
188 static int __smsc75xx_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 = __smsc75xx_phy_wait_not_busy(dev, in_pm);
199         if (ret < 0) {
200                 netdev_warn(dev->net, "MII is busy in smsc75xx_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 << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
208                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
209                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
210         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
211         if (ret < 0) {
212                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
213                 goto done;
214         }
215 
216         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
217         if (ret < 0) {
218                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
219                 goto done;
220         }
221 
222         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
223         if (ret < 0) {
224                 netdev_warn(dev->net, "Error reading MII_DATA\n");
225                 goto done;
226         }
227 
228         ret = (u16)(val & 0xFFFF);
229 
230 done:
231         mutex_unlock(&dev->phy_mutex);
232         return ret;
233 }
234 
235 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
236                                   int idx, int regval, int in_pm)
237 {
238         struct usbnet *dev = netdev_priv(netdev);
239         u32 val, addr;
240         int ret;
241 
242         mutex_lock(&dev->phy_mutex);
243 
244         /* confirm MII not busy */
245         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
246         if (ret < 0) {
247                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
248                 goto done;
249         }
250 
251         val = regval;
252         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
253         if (ret < 0) {
254                 netdev_warn(dev->net, "Error writing MII_DATA\n");
255                 goto done;
256         }
257 
258         /* set the address, index & direction (write to PHY) */
259         phy_id &= dev->mii.phy_id_mask;
260         idx &= dev->mii.reg_num_mask;
261         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
262                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
263                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
264         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
265         if (ret < 0) {
266                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
267                 goto done;
268         }
269 
270         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
271         if (ret < 0) {
272                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
273                 goto done;
274         }
275 
276 done:
277         mutex_unlock(&dev->phy_mutex);
278 }
279 
280 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
281                                    int idx)
282 {
283         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
284 }
285 
286 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
287                                      int idx, int regval)
288 {
289         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
290 }
291 
292 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
293 {
294         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
295 }
296 
297 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
298                                 int regval)
299 {
300         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
301 }
302 
303 static int smsc75xx_wait_eeprom(struct usbnet *dev)
304 {
305         unsigned long start_time = jiffies;
306         u32 val;
307         int ret;
308 
309         do {
310                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
311                 if (ret < 0) {
312                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
313                         return ret;
314                 }
315 
316                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
317                         break;
318                 udelay(40);
319         } while (!time_after(jiffies, start_time + HZ));
320 
321         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
322                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
323                 return -EIO;
324         }
325 
326         return 0;
327 }
328 
329 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
330 {
331         unsigned long start_time = jiffies;
332         u32 val;
333         int ret;
334 
335         do {
336                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
337                 if (ret < 0) {
338                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
339                         return ret;
340                 }
341 
342                 if (!(val & E2P_CMD_BUSY))
343                         return 0;
344 
345                 udelay(40);
346         } while (!time_after(jiffies, start_time + HZ));
347 
348         netdev_warn(dev->net, "EEPROM is busy\n");
349         return -EIO;
350 }
351 
352 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
353                                 u8 *data)
354 {
355         u32 val;
356         int i, ret;
357 
358         BUG_ON(!dev);
359         BUG_ON(!data);
360 
361         ret = smsc75xx_eeprom_confirm_not_busy(dev);
362         if (ret)
363                 return ret;
364 
365         for (i = 0; i < length; i++) {
366                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
367                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
368                 if (ret < 0) {
369                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
370                         return ret;
371                 }
372 
373                 ret = smsc75xx_wait_eeprom(dev);
374                 if (ret < 0)
375                         return ret;
376 
377                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
378                 if (ret < 0) {
379                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
380                         return ret;
381                 }
382 
383                 data[i] = val & 0xFF;
384                 offset++;
385         }
386 
387         return 0;
388 }
389 
390 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
391                                  u8 *data)
392 {
393         u32 val;
394         int i, ret;
395 
396         BUG_ON(!dev);
397         BUG_ON(!data);
398 
399         ret = smsc75xx_eeprom_confirm_not_busy(dev);
400         if (ret)
401                 return ret;
402 
403         /* Issue write/erase enable command */
404         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
405         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
406         if (ret < 0) {
407                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
408                 return ret;
409         }
410 
411         ret = smsc75xx_wait_eeprom(dev);
412         if (ret < 0)
413                 return ret;
414 
415         for (i = 0; i < length; i++) {
416 
417                 /* Fill data register */
418                 val = data[i];
419                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
420                 if (ret < 0) {
421                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
422                         return ret;
423                 }
424 
425                 /* Send "write" command */
426                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
427                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
428                 if (ret < 0) {
429                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
430                         return ret;
431                 }
432 
433                 ret = smsc75xx_wait_eeprom(dev);
434                 if (ret < 0)
435                         return ret;
436 
437                 offset++;
438         }
439 
440         return 0;
441 }
442 
443 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
444 {
445         int i, ret;
446 
447         for (i = 0; i < 100; i++) {
448                 u32 dp_sel;
449                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
450                 if (ret < 0) {
451                         netdev_warn(dev->net, "Error reading DP_SEL\n");
452                         return ret;
453                 }
454 
455                 if (dp_sel & DP_SEL_DPRDY)
456                         return 0;
457 
458                 udelay(40);
459         }
460 
461         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
462 
463         return -EIO;
464 }
465 
466 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
467                                    u32 length, u32 *buf)
468 {
469         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
470         u32 dp_sel;
471         int i, ret;
472 
473         mutex_lock(&pdata->dataport_mutex);
474 
475         ret = smsc75xx_dataport_wait_not_busy(dev);
476         if (ret < 0) {
477                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
478                 goto done;
479         }
480 
481         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
482         if (ret < 0) {
483                 netdev_warn(dev->net, "Error reading DP_SEL\n");
484                 goto done;
485         }
486 
487         dp_sel &= ~DP_SEL_RSEL;
488         dp_sel |= ram_select;
489         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
490         if (ret < 0) {
491                 netdev_warn(dev->net, "Error writing DP_SEL\n");
492                 goto done;
493         }
494 
495         for (i = 0; i < length; i++) {
496                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
497                 if (ret < 0) {
498                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
499                         goto done;
500                 }
501 
502                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
503                 if (ret < 0) {
504                         netdev_warn(dev->net, "Error writing DP_DATA\n");
505                         goto done;
506                 }
507 
508                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
509                 if (ret < 0) {
510                         netdev_warn(dev->net, "Error writing DP_CMD\n");
511                         goto done;
512                 }
513 
514                 ret = smsc75xx_dataport_wait_not_busy(dev);
515                 if (ret < 0) {
516                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
517                         goto done;
518                 }
519         }
520 
521 done:
522         mutex_unlock(&pdata->dataport_mutex);
523         return ret;
524 }
525 
526 /* returns hash bit number for given MAC address */
527 static u32 smsc75xx_hash(char addr[ETH_ALEN])
528 {
529         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
530 }
531 
532 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
533 {
534         struct smsc75xx_priv *pdata =
535                 container_of(param, struct smsc75xx_priv, set_multicast);
536         struct usbnet *dev = pdata->dev;
537         int ret;
538 
539         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
540                   pdata->rfe_ctl);
541 
542         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
543                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
544 
545         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
546         if (ret < 0)
547                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
548 }
549 
550 static void smsc75xx_set_multicast(struct net_device *netdev)
551 {
552         struct usbnet *dev = netdev_priv(netdev);
553         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
554         unsigned long flags;
555         int i;
556 
557         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
558 
559         pdata->rfe_ctl &=
560                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
561         pdata->rfe_ctl |= RFE_CTL_AB;
562 
563         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
564                 pdata->multicast_hash_table[i] = 0;
565 
566         if (dev->net->flags & IFF_PROMISC) {
567                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
568                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
569         } else if (dev->net->flags & IFF_ALLMULTI) {
570                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
571                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
572         } else if (!netdev_mc_empty(dev->net)) {
573                 struct netdev_hw_addr *ha;
574 
575                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
576 
577                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
578 
579                 netdev_for_each_mc_addr(ha, netdev) {
580                         u32 bitnum = smsc75xx_hash(ha->addr);
581                         pdata->multicast_hash_table[bitnum / 32] |=
582                                 (1 << (bitnum % 32));
583                 }
584         } else {
585                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
586                 pdata->rfe_ctl |= RFE_CTL_DPF;
587         }
588 
589         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
590 
591         /* defer register writes to a sleepable context */
592         schedule_work(&pdata->set_multicast);
593 }
594 
595 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
596                                             u16 lcladv, u16 rmtadv)
597 {
598         u32 flow = 0, fct_flow = 0;
599         int ret;
600 
601         if (duplex == DUPLEX_FULL) {
602                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
603 
604                 if (cap & FLOW_CTRL_TX) {
605                         flow = (FLOW_TX_FCEN | 0xFFFF);
606                         /* set fct_flow thresholds to 20% and 80% */
607                         fct_flow = (8 << 8) | 32;
608                 }
609 
610                 if (cap & FLOW_CTRL_RX)
611                         flow |= FLOW_RX_FCEN;
612 
613                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
614                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
615                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
616         } else {
617                 netif_dbg(dev, link, dev->net, "half duplex\n");
618         }
619 
620         ret = smsc75xx_write_reg(dev, FLOW, flow);
621         if (ret < 0) {
622                 netdev_warn(dev->net, "Error writing FLOW\n");
623                 return ret;
624         }
625 
626         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
627         if (ret < 0) {
628                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
629                 return ret;
630         }
631 
632         return 0;
633 }
634 
635 static int smsc75xx_link_reset(struct usbnet *dev)
636 {
637         struct mii_if_info *mii = &dev->mii;
638         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
639         u16 lcladv, rmtadv;
640         int ret;
641 
642         /* write to clear phy interrupt status */
643         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
644                 PHY_INT_SRC_CLEAR_ALL);
645 
646         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
647         if (ret < 0) {
648                 netdev_warn(dev->net, "Error writing INT_STS\n");
649                 return ret;
650         }
651 
652         mii_check_media(mii, 1, 1);
653         mii_ethtool_gset(&dev->mii, &ecmd);
654         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
655         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
656 
657         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
658                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
659 
660         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
661 }
662 
663 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
664 {
665         u32 intdata;
666 
667         if (urb->actual_length != 4) {
668                 netdev_warn(dev->net, "unexpected urb length %d\n",
669                             urb->actual_length);
670                 return;
671         }
672 
673         memcpy(&intdata, urb->transfer_buffer, 4);
674         le32_to_cpus(&intdata);
675 
676         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
677 
678         if (intdata & INT_ENP_PHY_INT)
679                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
680         else
681                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
682                             intdata);
683 }
684 
685 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
686 {
687         return MAX_EEPROM_SIZE;
688 }
689 
690 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
691                                        struct ethtool_eeprom *ee, u8 *data)
692 {
693         struct usbnet *dev = netdev_priv(netdev);
694 
695         ee->magic = LAN75XX_EEPROM_MAGIC;
696 
697         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
698 }
699 
700 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
701                                        struct ethtool_eeprom *ee, u8 *data)
702 {
703         struct usbnet *dev = netdev_priv(netdev);
704 
705         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
706                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
707                             ee->magic);
708                 return -EINVAL;
709         }
710 
711         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
712 }
713 
714 static void smsc75xx_ethtool_get_wol(struct net_device *net,
715                                      struct ethtool_wolinfo *wolinfo)
716 {
717         struct usbnet *dev = netdev_priv(net);
718         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
719 
720         wolinfo->supported = SUPPORTED_WAKE;
721         wolinfo->wolopts = pdata->wolopts;
722 }
723 
724 static int smsc75xx_ethtool_set_wol(struct net_device *net,
725                                     struct ethtool_wolinfo *wolinfo)
726 {
727         struct usbnet *dev = netdev_priv(net);
728         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
729         int ret;
730 
731         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
732 
733         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
734         if (ret < 0)
735                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
736 
737         return ret;
738 }
739 
740 static const struct ethtool_ops smsc75xx_ethtool_ops = {
741         .get_link       = usbnet_get_link,
742         .nway_reset     = usbnet_nway_reset,
743         .get_drvinfo    = usbnet_get_drvinfo,
744         .get_msglevel   = usbnet_get_msglevel,
745         .set_msglevel   = usbnet_set_msglevel,
746         .get_settings   = usbnet_get_settings,
747         .set_settings   = usbnet_set_settings,
748         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
749         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
750         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
751         .get_wol        = smsc75xx_ethtool_get_wol,
752         .set_wol        = smsc75xx_ethtool_set_wol,
753 };
754 
755 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
756 {
757         struct usbnet *dev = netdev_priv(netdev);
758 
759         if (!netif_running(netdev))
760                 return -EINVAL;
761 
762         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
763 }
764 
765 static void smsc75xx_init_mac_address(struct usbnet *dev)
766 {
767         const u8 *mac_addr;
768 
769         /* maybe the boot loader passed the MAC address in devicetree */
770         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
771         if (mac_addr) {
772                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
773                 return;
774         }
775 
776         /* try reading mac address from EEPROM */
777         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
778                         dev->net->dev_addr) == 0) {
779                 if (is_valid_ether_addr(dev->net->dev_addr)) {
780                         /* eeprom values are valid so use them */
781                         netif_dbg(dev, ifup, dev->net,
782                                   "MAC address read from EEPROM\n");
783                         return;
784                 }
785         }
786 
787         /* no useful static MAC address found. generate a random one */
788         eth_hw_addr_random(dev->net);
789         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
790 }
791 
792 static int smsc75xx_set_mac_address(struct usbnet *dev)
793 {
794         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
795                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
796         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
797 
798         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
799         if (ret < 0) {
800                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
801                 return ret;
802         }
803 
804         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
805         if (ret < 0) {
806                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
807                 return ret;
808         }
809 
810         addr_hi |= ADDR_FILTX_FB_VALID;
811         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
812         if (ret < 0) {
813                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
814                 return ret;
815         }
816 
817         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
818         if (ret < 0)
819                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
820 
821         return ret;
822 }
823 
824 static int smsc75xx_phy_initialize(struct usbnet *dev)
825 {
826         int bmcr, ret, timeout = 0;
827 
828         /* Initialize MII structure */
829         dev->mii.dev = dev->net;
830         dev->mii.mdio_read = smsc75xx_mdio_read;
831         dev->mii.mdio_write = smsc75xx_mdio_write;
832         dev->mii.phy_id_mask = 0x1f;
833         dev->mii.reg_num_mask = 0x1f;
834         dev->mii.supports_gmii = 1;
835         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
836 
837         /* reset phy and wait for reset to complete */
838         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
839 
840         do {
841                 msleep(10);
842                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
843                 if (bmcr < 0) {
844                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
845                         return bmcr;
846                 }
847                 timeout++;
848         } while ((bmcr & BMCR_RESET) && (timeout < 100));
849 
850         if (timeout >= 100) {
851                 netdev_warn(dev->net, "timeout on PHY Reset\n");
852                 return -EIO;
853         }
854 
855         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
856                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
857                 ADVERTISE_PAUSE_ASYM);
858         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
859                 ADVERTISE_1000FULL);
860 
861         /* read and write to clear phy interrupt status */
862         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
863         if (ret < 0) {
864                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
865                 return ret;
866         }
867 
868         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
869 
870         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
871                 PHY_INT_MASK_DEFAULT);
872         mii_nway_restart(&dev->mii);
873 
874         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
875         return 0;
876 }
877 
878 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
879 {
880         int ret = 0;
881         u32 buf;
882         bool rxenabled;
883 
884         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
885         if (ret < 0) {
886                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
887                 return ret;
888         }
889 
890         rxenabled = ((buf & MAC_RX_RXEN) != 0);
891 
892         if (rxenabled) {
893                 buf &= ~MAC_RX_RXEN;
894                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
895                 if (ret < 0) {
896                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
897                         return ret;
898                 }
899         }
900 
901         /* add 4 to size for FCS */
902         buf &= ~MAC_RX_MAX_SIZE;
903         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
904 
905         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
906         if (ret < 0) {
907                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
908                 return ret;
909         }
910 
911         if (rxenabled) {
912                 buf |= MAC_RX_RXEN;
913                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
914                 if (ret < 0) {
915                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
916                         return ret;
917                 }
918         }
919 
920         return 0;
921 }
922 
923 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
924 {
925         struct usbnet *dev = netdev_priv(netdev);
926         int ret;
927 
928         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
929                 return -EINVAL;
930 
931         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
932         if (ret < 0) {
933                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
934                 return ret;
935         }
936 
937         return usbnet_change_mtu(netdev, new_mtu);
938 }
939 
940 /* Enable or disable Rx checksum offload engine */
941 static int smsc75xx_set_features(struct net_device *netdev,
942         netdev_features_t features)
943 {
944         struct usbnet *dev = netdev_priv(netdev);
945         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
946         unsigned long flags;
947         int ret;
948 
949         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
950 
951         if (features & NETIF_F_RXCSUM)
952                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
953         else
954                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
955 
956         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
957         /* it's racing here! */
958 
959         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
960         if (ret < 0)
961                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
962 
963         return ret;
964 }
965 
966 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
967 {
968         int timeout = 0;
969 
970         do {
971                 u32 buf;
972                 int ret;
973 
974                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
975 
976                 if (ret < 0) {
977                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
978                         return ret;
979                 }
980 
981                 if (buf & PMT_CTL_DEV_RDY)
982                         return 0;
983 
984                 msleep(10);
985                 timeout++;
986         } while (timeout < 100);
987 
988         netdev_warn(dev->net, "timeout waiting for device ready\n");
989         return -EIO;
990 }
991 
992 static int smsc75xx_reset(struct usbnet *dev)
993 {
994         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
995         u32 buf;
996         int ret = 0, timeout;
997 
998         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
999 
1000         ret = smsc75xx_wait_ready(dev, 0);
1001         if (ret < 0) {
1002                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1003                 return ret;
1004         }
1005 
1006         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1007         if (ret < 0) {
1008                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1009                 return ret;
1010         }
1011 
1012         buf |= HW_CFG_LRST;
1013 
1014         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1015         if (ret < 0) {
1016                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1017                 return ret;
1018         }
1019 
1020         timeout = 0;
1021         do {
1022                 msleep(10);
1023                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1024                 if (ret < 0) {
1025                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1026                         return ret;
1027                 }
1028                 timeout++;
1029         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1030 
1031         if (timeout >= 100) {
1032                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1033                 return -EIO;
1034         }
1035 
1036         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1037 
1038         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1039         if (ret < 0) {
1040                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1041                 return ret;
1042         }
1043 
1044         buf |= PMT_CTL_PHY_RST;
1045 
1046         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1047         if (ret < 0) {
1048                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1049                 return ret;
1050         }
1051 
1052         timeout = 0;
1053         do {
1054                 msleep(10);
1055                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1056                 if (ret < 0) {
1057                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1058                         return ret;
1059                 }
1060                 timeout++;
1061         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1062 
1063         if (timeout >= 100) {
1064                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1065                 return -EIO;
1066         }
1067 
1068         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1069 
1070         ret = smsc75xx_set_mac_address(dev);
1071         if (ret < 0) {
1072                 netdev_warn(dev->net, "Failed to set mac address\n");
1073                 return ret;
1074         }
1075 
1076         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1077                   dev->net->dev_addr);
1078 
1079         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1080         if (ret < 0) {
1081                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1082                 return ret;
1083         }
1084 
1085         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1086                   buf);
1087 
1088         buf |= HW_CFG_BIR;
1089 
1090         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1091         if (ret < 0) {
1092                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1093                 return ret;
1094         }
1095 
1096         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1097         if (ret < 0) {
1098                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1099                 return ret;
1100         }
1101 
1102         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1103                   buf);
1104 
1105         if (!turbo_mode) {
1106                 buf = 0;
1107                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1108         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1109                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1110                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1111         } else {
1112                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1113                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1114         }
1115 
1116         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1117                   (ulong)dev->rx_urb_size);
1118 
1119         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1120         if (ret < 0) {
1121                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1122                 return ret;
1123         }
1124 
1125         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1126         if (ret < 0) {
1127                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1128                 return ret;
1129         }
1130 
1131         netif_dbg(dev, ifup, dev->net,
1132                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1133 
1134         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1135         if (ret < 0) {
1136                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1137                 return ret;
1138         }
1139 
1140         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1141         if (ret < 0) {
1142                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1143                 return ret;
1144         }
1145 
1146         netif_dbg(dev, ifup, dev->net,
1147                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1148 
1149         if (turbo_mode) {
1150                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1151                 if (ret < 0) {
1152                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1153                         return ret;
1154                 }
1155 
1156                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1157 
1158                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1159 
1160                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1161                 if (ret < 0) {
1162                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1163                         return ret;
1164                 }
1165 
1166                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1167                 if (ret < 0) {
1168                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1169                         return ret;
1170                 }
1171 
1172                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1173         }
1174 
1175         /* set FIFO sizes */
1176         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1177         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1178         if (ret < 0) {
1179                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1180                 return ret;
1181         }
1182 
1183         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1184 
1185         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1186         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1187         if (ret < 0) {
1188                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1189                 return ret;
1190         }
1191 
1192         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1193 
1194         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1195         if (ret < 0) {
1196                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1197                 return ret;
1198         }
1199 
1200         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1201         if (ret < 0) {
1202                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1203                 return ret;
1204         }
1205 
1206         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1207 
1208         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1209         if (ret < 0) {
1210                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1211                 return ret;
1212         }
1213 
1214         /* only set default GPIO/LED settings if no EEPROM is detected */
1215         if (!(buf & E2P_CMD_LOADED)) {
1216                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1217                 if (ret < 0) {
1218                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1219                         return ret;
1220                 }
1221 
1222                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1223                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1224 
1225                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1226                 if (ret < 0) {
1227                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1228                         return ret;
1229                 }
1230         }
1231 
1232         ret = smsc75xx_write_reg(dev, FLOW, 0);
1233         if (ret < 0) {
1234                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1235                 return ret;
1236         }
1237 
1238         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1239         if (ret < 0) {
1240                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1241                 return ret;
1242         }
1243 
1244         /* Don't need rfe_ctl_lock during initialisation */
1245         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1246         if (ret < 0) {
1247                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1248                 return ret;
1249         }
1250 
1251         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1252 
1253         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1254         if (ret < 0) {
1255                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1256                 return ret;
1257         }
1258 
1259         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1260         if (ret < 0) {
1261                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1262                 return ret;
1263         }
1264 
1265         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1266                   pdata->rfe_ctl);
1267 
1268         /* Enable or disable checksum offload engines */
1269         smsc75xx_set_features(dev->net, dev->net->features);
1270 
1271         smsc75xx_set_multicast(dev->net);
1272 
1273         ret = smsc75xx_phy_initialize(dev);
1274         if (ret < 0) {
1275                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1276                 return ret;
1277         }
1278 
1279         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1280         if (ret < 0) {
1281                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1282                 return ret;
1283         }
1284 
1285         /* enable PHY interrupts */
1286         buf |= INT_ENP_PHY_INT;
1287 
1288         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1289         if (ret < 0) {
1290                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1291                 return ret;
1292         }
1293 
1294         /* allow mac to detect speed and duplex from phy */
1295         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1296         if (ret < 0) {
1297                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1298                 return ret;
1299         }
1300 
1301         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1302         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1303         if (ret < 0) {
1304                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1305                 return ret;
1306         }
1307 
1308         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1309         if (ret < 0) {
1310                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1311                 return ret;
1312         }
1313 
1314         buf |= MAC_TX_TXEN;
1315 
1316         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1317         if (ret < 0) {
1318                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1319                 return ret;
1320         }
1321 
1322         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1323 
1324         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1325         if (ret < 0) {
1326                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1327                 return ret;
1328         }
1329 
1330         buf |= FCT_TX_CTL_EN;
1331 
1332         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1333         if (ret < 0) {
1334                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1335                 return ret;
1336         }
1337 
1338         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1339 
1340         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1341         if (ret < 0) {
1342                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1343                 return ret;
1344         }
1345 
1346         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1347         if (ret < 0) {
1348                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1349                 return ret;
1350         }
1351 
1352         buf |= MAC_RX_RXEN;
1353 
1354         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1355         if (ret < 0) {
1356                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1357                 return ret;
1358         }
1359 
1360         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1361 
1362         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1363         if (ret < 0) {
1364                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1365                 return ret;
1366         }
1367 
1368         buf |= FCT_RX_CTL_EN;
1369 
1370         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1371         if (ret < 0) {
1372                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1373                 return ret;
1374         }
1375 
1376         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1377 
1378         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1379         return 0;
1380 }
1381 
1382 static const struct net_device_ops smsc75xx_netdev_ops = {
1383         .ndo_open               = usbnet_open,
1384         .ndo_stop               = usbnet_stop,
1385         .ndo_start_xmit         = usbnet_start_xmit,
1386         .ndo_tx_timeout         = usbnet_tx_timeout,
1387         .ndo_change_mtu         = smsc75xx_change_mtu,
1388         .ndo_set_mac_address    = eth_mac_addr,
1389         .ndo_validate_addr      = eth_validate_addr,
1390         .ndo_do_ioctl           = smsc75xx_ioctl,
1391         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1392         .ndo_set_features       = smsc75xx_set_features,
1393 };
1394 
1395 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1396 {
1397         struct smsc75xx_priv *pdata = NULL;
1398         int ret;
1399 
1400         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1401 
1402         ret = usbnet_get_endpoints(dev, intf);
1403         if (ret < 0) {
1404                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1405                 return ret;
1406         }
1407 
1408         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1409                                               GFP_KERNEL);
1410 
1411         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1412         if (!pdata)
1413                 return -ENOMEM;
1414 
1415         pdata->dev = dev;
1416 
1417         spin_lock_init(&pdata->rfe_ctl_lock);
1418         mutex_init(&pdata->dataport_mutex);
1419 
1420         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1421 
1422         if (DEFAULT_TX_CSUM_ENABLE)
1423                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1424 
1425         if (DEFAULT_RX_CSUM_ENABLE)
1426                 dev->net->features |= NETIF_F_RXCSUM;
1427 
1428         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1429                                 NETIF_F_RXCSUM;
1430 
1431         ret = smsc75xx_wait_ready(dev, 0);
1432         if (ret < 0) {
1433                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1434                 return ret;
1435         }
1436 
1437         smsc75xx_init_mac_address(dev);
1438 
1439         /* Init all registers */
1440         ret = smsc75xx_reset(dev);
1441         if (ret < 0) {
1442                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1443                 return ret;
1444         }
1445 
1446         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1447         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1448         dev->net->flags |= IFF_MULTICAST;
1449         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1450         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1451         return 0;
1452 }
1453 
1454 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1455 {
1456         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1457         if (pdata) {
1458                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1459                 kfree(pdata);
1460                 pdata = NULL;
1461                 dev->data[0] = 0;
1462         }
1463 }
1464 
1465 static u16 smsc_crc(const u8 *buffer, size_t len)
1466 {
1467         return bitrev16(crc16(0xFFFF, buffer, len));
1468 }
1469 
1470 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1471                                u32 wuf_mask1)
1472 {
1473         int cfg_base = WUF_CFGX + filter * 4;
1474         int mask_base = WUF_MASKX + filter * 16;
1475         int ret;
1476 
1477         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1478         if (ret < 0) {
1479                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1480                 return ret;
1481         }
1482 
1483         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
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 + 4, 0);
1490         if (ret < 0) {
1491                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1492                 return ret;
1493         }
1494 
1495         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1496         if (ret < 0) {
1497                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1498                 return ret;
1499         }
1500 
1501         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1502         if (ret < 0) {
1503                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1504                 return ret;
1505         }
1506 
1507         return 0;
1508 }
1509 
1510 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1511 {
1512         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1513         u32 val;
1514         int ret;
1515 
1516         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1517         if (ret < 0) {
1518                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1519                 return ret;
1520         }
1521 
1522         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1523         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1524 
1525         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1526         if (ret < 0) {
1527                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1528                 return ret;
1529         }
1530 
1531         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1532 
1533         return 0;
1534 }
1535 
1536 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1537 {
1538         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1539         u32 val;
1540         int ret;
1541 
1542         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1543         if (ret < 0) {
1544                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1545                 return ret;
1546         }
1547 
1548         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1549         val |= PMT_CTL_SUS_MODE_1;
1550 
1551         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1552         if (ret < 0) {
1553                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1554                 return ret;
1555         }
1556 
1557         /* clear wol status, enable energy detection */
1558         val &= ~PMT_CTL_WUPS;
1559         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1560 
1561         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1562         if (ret < 0) {
1563                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1564                 return ret;
1565         }
1566 
1567         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1568 
1569         return 0;
1570 }
1571 
1572 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1573 {
1574         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1575         u32 val;
1576         int ret;
1577 
1578         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1579         if (ret < 0) {
1580                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1581                 return ret;
1582         }
1583 
1584         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1585         val |= PMT_CTL_SUS_MODE_2;
1586 
1587         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1588         if (ret < 0) {
1589                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1590                 return ret;
1591         }
1592 
1593         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1594 
1595         return 0;
1596 }
1597 
1598 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1599 {
1600         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1601         u32 val;
1602         int ret;
1603 
1604         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1605         if (ret < 0) {
1606                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1607                 return ret;
1608         }
1609 
1610         if (val & FCT_RX_CTL_RXUSED) {
1611                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1612                 return -EBUSY;
1613         }
1614 
1615         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1616         if (ret < 0) {
1617                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1618                 return ret;
1619         }
1620 
1621         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1622         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1623 
1624         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1625         if (ret < 0) {
1626                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1627                 return ret;
1628         }
1629 
1630         /* clear wol status */
1631         val &= ~PMT_CTL_WUPS;
1632         val |= PMT_CTL_WUPS_WOL;
1633 
1634         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1635         if (ret < 0) {
1636                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1637                 return ret;
1638         }
1639 
1640         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1641 
1642         return 0;
1643 }
1644 
1645 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1646 {
1647         struct mii_if_info *mii = &dev->mii;
1648         int ret;
1649 
1650         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1651 
1652         /* read to clear */
1653         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1654         if (ret < 0) {
1655                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1656                 return ret;
1657         }
1658 
1659         /* enable interrupt source */
1660         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1661         if (ret < 0) {
1662                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1663                 return ret;
1664         }
1665 
1666         ret |= mask;
1667 
1668         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1669 
1670         return 0;
1671 }
1672 
1673 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1674 {
1675         struct mii_if_info *mii = &dev->mii;
1676         int ret;
1677 
1678         /* first, a dummy read, needed to latch some MII phys */
1679         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1680         if (ret < 0) {
1681                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1682                 return ret;
1683         }
1684 
1685         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1686         if (ret < 0) {
1687                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1688                 return ret;
1689         }
1690 
1691         return !!(ret & BMSR_LSTATUS);
1692 }
1693 
1694 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1695 {
1696         int ret;
1697 
1698         if (!netif_running(dev->net)) {
1699                 /* interface is ifconfig down so fully power down hw */
1700                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1701                 return smsc75xx_enter_suspend2(dev);
1702         }
1703 
1704         if (!link_up) {
1705                 /* link is down so enter EDPD mode */
1706                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1707 
1708                 /* enable PHY wakeup events for if cable is attached */
1709                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1710                         PHY_INT_MASK_ANEG_COMP);
1711                 if (ret < 0) {
1712                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1713                         return ret;
1714                 }
1715 
1716                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1717                 return smsc75xx_enter_suspend1(dev);
1718         }
1719 
1720         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1721         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1722                 PHY_INT_MASK_LINK_DOWN);
1723         if (ret < 0) {
1724                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1725                 return ret;
1726         }
1727 
1728         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1729         return smsc75xx_enter_suspend3(dev);
1730 }
1731 
1732 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1733 {
1734         struct usbnet *dev = usb_get_intfdata(intf);
1735         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1736         u32 val, link_up;
1737         int ret;
1738 
1739         ret = usbnet_suspend(intf, message);
1740         if (ret < 0) {
1741                 netdev_warn(dev->net, "usbnet_suspend error\n");
1742                 return ret;
1743         }
1744 
1745         if (pdata->suspend_flags) {
1746                 netdev_warn(dev->net, "error during last resume\n");
1747                 pdata->suspend_flags = 0;
1748         }
1749 
1750         /* determine if link is up using only _nopm functions */
1751         link_up = smsc75xx_link_ok_nopm(dev);
1752 
1753         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1754                 ret = smsc75xx_autosuspend(dev, link_up);
1755                 goto done;
1756         }
1757 
1758         /* if we get this far we're not autosuspending */
1759         /* if no wol options set, or if link is down and we're not waking on
1760          * PHY activity, enter lowest power SUSPEND2 mode
1761          */
1762         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1763                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1764                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1765 
1766                 /* disable energy detect (link up) & wake up events */
1767                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1768                 if (ret < 0) {
1769                         netdev_warn(dev->net, "Error reading WUCSR\n");
1770                         goto done;
1771                 }
1772 
1773                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1774 
1775                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1776                 if (ret < 0) {
1777                         netdev_warn(dev->net, "Error writing WUCSR\n");
1778                         goto done;
1779                 }
1780 
1781                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1782                 if (ret < 0) {
1783                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1784                         goto done;
1785                 }
1786 
1787                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1788 
1789                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1790                 if (ret < 0) {
1791                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1792                         goto done;
1793                 }
1794 
1795                 ret = smsc75xx_enter_suspend2(dev);
1796                 goto done;
1797         }
1798 
1799         if (pdata->wolopts & WAKE_PHY) {
1800                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1801                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1802                 if (ret < 0) {
1803                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1804                         goto done;
1805                 }
1806 
1807                 /* if link is down then configure EDPD and enter SUSPEND1,
1808                  * otherwise enter SUSPEND0 below
1809                  */
1810                 if (!link_up) {
1811                         struct mii_if_info *mii = &dev->mii;
1812                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1813 
1814                         /* enable energy detect power-down mode */
1815                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1816                                 PHY_MODE_CTRL_STS);
1817                         if (ret < 0) {
1818                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1819                                 goto done;
1820                         }
1821 
1822                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1823 
1824                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1825                                 PHY_MODE_CTRL_STS, ret);
1826 
1827                         /* enter SUSPEND1 mode */
1828                         ret = smsc75xx_enter_suspend1(dev);
1829                         goto done;
1830                 }
1831         }
1832 
1833         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1834                 int i, filter = 0;
1835 
1836                 /* disable all filters */
1837                 for (i = 0; i < WUF_NUM; i++) {
1838                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1839                         if (ret < 0) {
1840                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1841                                 goto done;
1842                         }
1843                 }
1844 
1845                 if (pdata->wolopts & WAKE_MCAST) {
1846                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1847                         netdev_info(dev->net, "enabling multicast detection\n");
1848 
1849                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1850                                 | smsc_crc(mcast, 3);
1851                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1852                         if (ret < 0) {
1853                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1854                                 goto done;
1855                         }
1856                 }
1857 
1858                 if (pdata->wolopts & WAKE_ARP) {
1859                         const u8 arp[] = {0x08, 0x06};
1860                         netdev_info(dev->net, "enabling ARP detection\n");
1861 
1862                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1863                                 | smsc_crc(arp, 2);
1864                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1865                         if (ret < 0) {
1866                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1867                                 goto done;
1868                         }
1869                 }
1870 
1871                 /* clear any pending pattern match packet status */
1872                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1873                 if (ret < 0) {
1874                         netdev_warn(dev->net, "Error reading WUCSR\n");
1875                         goto done;
1876                 }
1877 
1878                 val |= WUCSR_WUFR;
1879 
1880                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1881                 if (ret < 0) {
1882                         netdev_warn(dev->net, "Error writing WUCSR\n");
1883                         goto done;
1884                 }
1885 
1886                 netdev_info(dev->net, "enabling packet match detection\n");
1887                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1888                 if (ret < 0) {
1889                         netdev_warn(dev->net, "Error reading WUCSR\n");
1890                         goto done;
1891                 }
1892 
1893                 val |= WUCSR_WUEN;
1894 
1895                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1896                 if (ret < 0) {
1897                         netdev_warn(dev->net, "Error writing WUCSR\n");
1898                         goto done;
1899                 }
1900         } else {
1901                 netdev_info(dev->net, "disabling packet match detection\n");
1902                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1903                 if (ret < 0) {
1904                         netdev_warn(dev->net, "Error reading WUCSR\n");
1905                         goto done;
1906                 }
1907 
1908                 val &= ~WUCSR_WUEN;
1909 
1910                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1911                 if (ret < 0) {
1912                         netdev_warn(dev->net, "Error writing WUCSR\n");
1913                         goto done;
1914                 }
1915         }
1916 
1917         /* disable magic, bcast & unicast wakeup sources */
1918         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1919         if (ret < 0) {
1920                 netdev_warn(dev->net, "Error reading WUCSR\n");
1921                 goto done;
1922         }
1923 
1924         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1925 
1926         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1927         if (ret < 0) {
1928                 netdev_warn(dev->net, "Error writing WUCSR\n");
1929                 goto done;
1930         }
1931 
1932         if (pdata->wolopts & WAKE_PHY) {
1933                 netdev_info(dev->net, "enabling PHY wakeup\n");
1934 
1935                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1936                 if (ret < 0) {
1937                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1938                         goto done;
1939                 }
1940 
1941                 /* clear wol status, enable energy detection */
1942                 val &= ~PMT_CTL_WUPS;
1943                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1944 
1945                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1946                 if (ret < 0) {
1947                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1948                         goto done;
1949                 }
1950         }
1951 
1952         if (pdata->wolopts & WAKE_MAGIC) {
1953                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1954                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1955                 if (ret < 0) {
1956                         netdev_warn(dev->net, "Error reading WUCSR\n");
1957                         goto done;
1958                 }
1959 
1960                 /* clear any pending magic packet status */
1961                 val |= WUCSR_MPR | WUCSR_MPEN;
1962 
1963                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1964                 if (ret < 0) {
1965                         netdev_warn(dev->net, "Error writing WUCSR\n");
1966                         goto done;
1967                 }
1968         }
1969 
1970         if (pdata->wolopts & WAKE_BCAST) {
1971                 netdev_info(dev->net, "enabling broadcast detection\n");
1972                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1973                 if (ret < 0) {
1974                         netdev_warn(dev->net, "Error reading WUCSR\n");
1975                         goto done;
1976                 }
1977 
1978                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1979 
1980                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1981                 if (ret < 0) {
1982                         netdev_warn(dev->net, "Error writing WUCSR\n");
1983                         goto done;
1984                 }
1985         }
1986 
1987         if (pdata->wolopts & WAKE_UCAST) {
1988                 netdev_info(dev->net, "enabling unicast detection\n");
1989                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1990                 if (ret < 0) {
1991                         netdev_warn(dev->net, "Error reading WUCSR\n");
1992                         goto done;
1993                 }
1994 
1995                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1996 
1997                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1998                 if (ret < 0) {
1999                         netdev_warn(dev->net, "Error writing WUCSR\n");
2000                         goto done;
2001                 }
2002         }
2003 
2004         /* enable receiver to enable frame reception */
2005         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2006         if (ret < 0) {
2007                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2008                 goto done;
2009         }
2010 
2011         val |= MAC_RX_RXEN;
2012 
2013         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2014         if (ret < 0) {
2015                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2016                 goto done;
2017         }
2018 
2019         /* some wol options are enabled, so enter SUSPEND0 */
2020         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2021         ret = smsc75xx_enter_suspend0(dev);
2022 
2023 done:
2024         /*
2025          * TODO: resume() might need to handle the suspend failure
2026          * in system sleep
2027          */
2028         if (ret && PMSG_IS_AUTO(message))
2029                 usbnet_resume(intf);
2030         return ret;
2031 }
2032 
2033 static int smsc75xx_resume(struct usb_interface *intf)
2034 {
2035         struct usbnet *dev = usb_get_intfdata(intf);
2036         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2037         u8 suspend_flags = pdata->suspend_flags;
2038         int ret;
2039         u32 val;
2040 
2041         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2042 
2043         /* do this first to ensure it's cleared even in error case */
2044         pdata->suspend_flags = 0;
2045 
2046         if (suspend_flags & SUSPEND_ALLMODES) {
2047                 /* Disable wakeup sources */
2048                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2049                 if (ret < 0) {
2050                         netdev_warn(dev->net, "Error reading WUCSR\n");
2051                         return ret;
2052                 }
2053 
2054                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2055                         | WUCSR_BCST_EN);
2056 
2057                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2058                 if (ret < 0) {
2059                         netdev_warn(dev->net, "Error writing WUCSR\n");
2060                         return ret;
2061                 }
2062 
2063                 /* clear wake-up status */
2064                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2065                 if (ret < 0) {
2066                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2067                         return ret;
2068                 }
2069 
2070                 val &= ~PMT_CTL_WOL_EN;
2071                 val |= PMT_CTL_WUPS;
2072 
2073                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2074                 if (ret < 0) {
2075                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2076                         return ret;
2077                 }
2078         }
2079 
2080         if (suspend_flags & SUSPEND_SUSPEND2) {
2081                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2082 
2083                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2084                 if (ret < 0) {
2085                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2086                         return ret;
2087                 }
2088 
2089                 val |= PMT_CTL_PHY_PWRUP;
2090 
2091                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2092                 if (ret < 0) {
2093                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2094                         return ret;
2095                 }
2096         }
2097 
2098         ret = smsc75xx_wait_ready(dev, 1);
2099         if (ret < 0) {
2100                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2101                 return ret;
2102         }
2103 
2104         return usbnet_resume(intf);
2105 }
2106 
2107 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2108                                      u32 rx_cmd_a, u32 rx_cmd_b)
2109 {
2110         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2111             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2112                 skb->ip_summed = CHECKSUM_NONE;
2113         } else {
2114                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2115                 skb->ip_summed = CHECKSUM_COMPLETE;
2116         }
2117 }
2118 
2119 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2120 {
2121         /* This check is no longer done by usbnet */
2122         if (skb->len < dev->net->hard_header_len)
2123                 return 0;
2124 
2125         while (skb->len > 0) {
2126                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2127                 struct sk_buff *ax_skb;
2128                 unsigned char *packet;
2129 
2130                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2131                 le32_to_cpus(&rx_cmd_a);
2132                 skb_pull(skb, 4);
2133 
2134                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2135                 le32_to_cpus(&rx_cmd_b);
2136                 skb_pull(skb, 4 + RXW_PADDING);
2137 
2138                 packet = skb->data;
2139 
2140                 /* get the packet length */
2141                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2142                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2143 
2144                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2145                         netif_dbg(dev, rx_err, dev->net,
2146                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2147                         dev->net->stats.rx_errors++;
2148                         dev->net->stats.rx_dropped++;
2149 
2150                         if (rx_cmd_a & RX_CMD_A_FCS)
2151                                 dev->net->stats.rx_crc_errors++;
2152                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2153                                 dev->net->stats.rx_frame_errors++;
2154                 } else {
2155                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2156                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2157                                 netif_dbg(dev, rx_err, dev->net,
2158                                           "size err rx_cmd_a=0x%08x\n",
2159                                           rx_cmd_a);
2160                                 return 0;
2161                         }
2162 
2163                         /* last frame in this batch */
2164                         if (skb->len == size) {
2165                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2166                                         rx_cmd_b);
2167 
2168                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2169                                 skb->truesize = size + sizeof(struct sk_buff);
2170 
2171                                 return 1;
2172                         }
2173 
2174                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2175                         if (unlikely(!ax_skb)) {
2176                                 netdev_warn(dev->net, "Error allocating skb\n");
2177                                 return 0;
2178                         }
2179 
2180                         ax_skb->len = size;
2181                         ax_skb->data = packet;
2182                         skb_set_tail_pointer(ax_skb, size);
2183 
2184                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2185                                 rx_cmd_b);
2186 
2187                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2188                         ax_skb->truesize = size + sizeof(struct sk_buff);
2189 
2190                         usbnet_skb_return(dev, ax_skb);
2191                 }
2192 
2193                 skb_pull(skb, size);
2194 
2195                 /* padding bytes before the next frame starts */
2196                 if (skb->len)
2197                         skb_pull(skb, align_count);
2198         }
2199 
2200         return 1;
2201 }
2202 
2203 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2204                                          struct sk_buff *skb, gfp_t flags)
2205 {
2206         u32 tx_cmd_a, tx_cmd_b;
2207 
2208         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2209                 struct sk_buff *skb2 =
2210                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2211                 dev_kfree_skb_any(skb);
2212                 skb = skb2;
2213                 if (!skb)
2214                         return NULL;
2215         }
2216 
2217         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2218 
2219         if (skb->ip_summed == CHECKSUM_PARTIAL)
2220                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2221 
2222         if (skb_is_gso(skb)) {
2223                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2224                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2225 
2226                 tx_cmd_a |= TX_CMD_A_LSO;
2227         } else {
2228                 tx_cmd_b = 0;
2229         }
2230 
2231         skb_push(skb, 4);
2232         cpu_to_le32s(&tx_cmd_b);
2233         memcpy(skb->data, &tx_cmd_b, 4);
2234 
2235         skb_push(skb, 4);
2236         cpu_to_le32s(&tx_cmd_a);
2237         memcpy(skb->data, &tx_cmd_a, 4);
2238 
2239         return skb;
2240 }
2241 
2242 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2243 {
2244         dev->intf->needs_remote_wakeup = on;
2245         return 0;
2246 }
2247 
2248 static const struct driver_info smsc75xx_info = {
2249         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2250         .bind           = smsc75xx_bind,
2251         .unbind         = smsc75xx_unbind,
2252         .link_reset     = smsc75xx_link_reset,
2253         .reset          = smsc75xx_reset,
2254         .rx_fixup       = smsc75xx_rx_fixup,
2255         .tx_fixup       = smsc75xx_tx_fixup,
2256         .status         = smsc75xx_status,
2257         .manage_power   = smsc75xx_manage_power,
2258         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2259 };
2260 
2261 static const struct usb_device_id products[] = {
2262         {
2263                 /* SMSC7500 USB Gigabit Ethernet Device */
2264                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2265                 .driver_info = (unsigned long) &smsc75xx_info,
2266         },
2267         {
2268                 /* SMSC7500 USB Gigabit Ethernet Device */
2269                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2270                 .driver_info = (unsigned long) &smsc75xx_info,
2271         },
2272         { },            /* END */
2273 };
2274 MODULE_DEVICE_TABLE(usb, products);
2275 
2276 static struct usb_driver smsc75xx_driver = {
2277         .name           = SMSC_CHIPNAME,
2278         .id_table       = products,
2279         .probe          = usbnet_probe,
2280         .suspend        = smsc75xx_suspend,
2281         .resume         = smsc75xx_resume,
2282         .reset_resume   = smsc75xx_resume,
2283         .disconnect     = usbnet_disconnect,
2284         .disable_hub_initiated_lpm = 1,
2285         .supports_autosuspend = 1,
2286 };
2287 
2288 module_usb_driver(smsc75xx_driver);
2289 
2290 MODULE_AUTHOR("Nancy Lin");
2291 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2292 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2293 MODULE_LICENSE("GPL");
2294 

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