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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / net / usb / smsc95xx.c
blob262e7a3c23cb67fbfd66b81ed0d26af0f0480d84
1 /***************************************************************************
2 *
3 * Copyright (C) 2007-2008 SMSC
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 *
18 *****************************************************************************/
19
20 #include <linux/module.h>
21 #include <linux/kmod.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/mii.h>
26 #include <linux/usb.h>
27 #include <linux/bitrev.h>
28 #include <linux/crc16.h>
29 #include <linux/crc32.h>
30 #include <linux/usb/usbnet.h>
31 #include <linux/slab.h>
32 #include <linux/of_net.h>
33 #include "smsc95xx.h"
34
35 #define SMSC_CHIPNAME "smsc95xx"
36 #define SMSC_DRIVER_VERSION "1.0.6"
37 #define HS_USB_PKT_SIZE (512)
38 #define FS_USB_PKT_SIZE (64)
39 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
40 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
41 #define DEFAULT_BULK_IN_DELAY (0x00002000)
42 #define MAX_SINGLE_PACKET_SIZE (2048)
43 #define LAN95XX_EEPROM_MAGIC (0x9500)
44 #define EEPROM_MAC_OFFSET (0x01)
45 #define DEFAULT_TX_CSUM_ENABLE (true)
46 #define DEFAULT_RX_CSUM_ENABLE (true)
47 #define SMSC95XX_INTERNAL_PHY_ID (1)
48 #define SMSC95XX_TX_OVERHEAD (8)
49 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
50 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
51 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
52
53 #define FEATURE_8_WAKEUP_FILTERS (0x01)
54 #define FEATURE_PHY_NLP_CROSSOVER (0x02)
55 #define FEATURE_REMOTE_WAKEUP (0x04)
56
57 #define SUSPEND_SUSPEND0 (0x01)
58 #define SUSPEND_SUSPEND1 (0x02)
59 #define SUSPEND_SUSPEND2 (0x04)
60 #define SUSPEND_SUSPEND3 (0x08)
61 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
62 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
63
64 #define CARRIER_CHECK_DELAY (2 * HZ)
65
66 struct smsc95xx_priv {
67 u32 chip_id;
68 u32 mac_cr;
69 u32 hash_hi;
70 u32 hash_lo;
71 u32 wolopts;
72 spinlock_t mac_cr_lock;
73 u8 features;
74 u8 suspend_flags;
75 u8 mdix_ctrl;
76 bool link_ok;
77 struct delayed_work carrier_check;
78 struct usbnet *dev;
79 };
80
81 static bool turbo_mode = true;
82 module_param(turbo_mode, bool, 0644);
83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
84
85 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
86 u32 *data, int in_pm)
87 {
88 u32 buf;
89 int ret;
90 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
91
92 BUG_ON(!dev);
93
94 if (!in_pm)
95 fn = usbnet_read_cmd;
96 else
97 fn = usbnet_read_cmd_nopm;
98
99 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
100 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
101 0, index, &buf, 4);
102 if (unlikely(ret < 0)) {
103 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
104 index, ret);
105 return ret;
106 }
107
108 le32_to_cpus(&buf);
109 *data = buf;
110
111 return ret;
112 }
113
114 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
115 u32 data, int in_pm)
116 {
117 u32 buf;
118 int ret;
119 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
120
121 BUG_ON(!dev);
122
123 if (!in_pm)
124 fn = usbnet_write_cmd;
125 else
126 fn = usbnet_write_cmd_nopm;
127
128 buf = data;
129 cpu_to_le32s(&buf);
130
131 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
132 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
133 0, index, &buf, 4);
134 if (unlikely(ret < 0))
135 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
136 index, ret);
137
138 return ret;
139 }
140
141 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
142 u32 *data)
143 {
144 return __smsc95xx_read_reg(dev, index, data, 1);
145 }
146
147 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
148 u32 data)
149 {
150 return __smsc95xx_write_reg(dev, index, data, 1);
151 }
152
153 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
154 u32 *data)
155 {
156 return __smsc95xx_read_reg(dev, index, data, 0);
157 }
158
159 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
160 u32 data)
161 {
162 return __smsc95xx_write_reg(dev, index, data, 0);
163 }
164
165 /* Loop until the read is completed with timeout
166 * called with phy_mutex held */
167 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
168 int in_pm)
169 {
170 unsigned long start_time = jiffies;
171 u32 val;
172 int ret;
173
174 do {
175 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
176 if (ret < 0) {
177 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
178 return ret;
179 }
180
181 if (!(val & MII_BUSY_))
182 return 0;
183 } while (!time_after(jiffies, start_time + HZ));
184
185 return -EIO;
186 }
187
188 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
189 int in_pm)
190 {
191 struct usbnet *dev = netdev_priv(netdev);
192 u32 val, addr;
193 int ret;
194
195 mutex_lock(&dev->phy_mutex);
196
197 /* confirm MII not busy */
198 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
199 if (ret < 0) {
200 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
201 goto done;
202 }
203
204 /* set the address, index & direction (read from PHY) */
205 phy_id &= dev->mii.phy_id_mask;
206 idx &= dev->mii.reg_num_mask;
207 addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
208 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
209 if (ret < 0) {
210 netdev_warn(dev->net, "Error writing MII_ADDR\n");
211 goto done;
212 }
213
214 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
215 if (ret < 0) {
216 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
217 goto done;
218 }
219
220 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
221 if (ret < 0) {
222 netdev_warn(dev->net, "Error reading MII_DATA\n");
223 goto done;
224 }
225
226 ret = (u16)(val & 0xFFFF);
227
228 done:
229 mutex_unlock(&dev->phy_mutex);
230 return ret;
231 }
232
233 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
234 int idx, int regval, int in_pm)
235 {
236 struct usbnet *dev = netdev_priv(netdev);
237 u32 val, addr;
238 int ret;
239
240 mutex_lock(&dev->phy_mutex);
241
242 /* confirm MII not busy */
243 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
244 if (ret < 0) {
245 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
246 goto done;
247 }
248
249 val = regval;
250 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
251 if (ret < 0) {
252 netdev_warn(dev->net, "Error writing MII_DATA\n");
253 goto done;
254 }
255
256 /* set the address, index & direction (write to PHY) */
257 phy_id &= dev->mii.phy_id_mask;
258 idx &= dev->mii.reg_num_mask;
259 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
260 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
261 if (ret < 0) {
262 netdev_warn(dev->net, "Error writing MII_ADDR\n");
263 goto done;
264 }
265
266 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
267 if (ret < 0) {
268 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
269 goto done;
270 }
271
272 done:
273 mutex_unlock(&dev->phy_mutex);
274 }
275
276 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
277 int idx)
278 {
279 return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
280 }
281
282 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
283 int idx, int regval)
284 {
285 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
286 }
287
288 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
289 {
290 return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
291 }
292
293 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
294 int regval)
295 {
296 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
297 }
298
299 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
300 {
301 unsigned long start_time = jiffies;
302 u32 val;
303 int ret;
304
305 do {
306 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
307 if (ret < 0) {
308 netdev_warn(dev->net, "Error reading E2P_CMD\n");
309 return ret;
310 }
311
312 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
313 break;
314 udelay(40);
315 } while (!time_after(jiffies, start_time + HZ));
316
317 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
318 netdev_warn(dev->net, "EEPROM read operation timeout\n");
319 return -EIO;
320 }
321
322 return 0;
323 }
324
325 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
326 {
327 unsigned long start_time = jiffies;
328 u32 val;
329 int ret;
330
331 do {
332 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
333 if (ret < 0) {
334 netdev_warn(dev->net, "Error reading E2P_CMD\n");
335 return ret;
336 }
337
338 if (!(val & E2P_CMD_BUSY_))
339 return 0;
340
341 udelay(40);
342 } while (!time_after(jiffies, start_time + HZ));
343
344 netdev_warn(dev->net, "EEPROM is busy\n");
345 return -EIO;
346 }
347
348 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
349 u8 *data)
350 {
351 u32 val;
352 int i, ret;
353
354 BUG_ON(!dev);
355 BUG_ON(!data);
356
357 ret = smsc95xx_eeprom_confirm_not_busy(dev);
358 if (ret)
359 return ret;
360
361 for (i = 0; i < length; i++) {
362 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
363 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
364 if (ret < 0) {
365 netdev_warn(dev->net, "Error writing E2P_CMD\n");
366 return ret;
367 }
368
369 ret = smsc95xx_wait_eeprom(dev);
370 if (ret < 0)
371 return ret;
372
373 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
374 if (ret < 0) {
375 netdev_warn(dev->net, "Error reading E2P_DATA\n");
376 return ret;
377 }
378
379 data[i] = val & 0xFF;
380 offset++;
381 }
382
383 return 0;
384 }
385
386 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
387 u8 *data)
388 {
389 u32 val;
390 int i, ret;
391
392 BUG_ON(!dev);
393 BUG_ON(!data);
394
395 ret = smsc95xx_eeprom_confirm_not_busy(dev);
396 if (ret)
397 return ret;
398
399 /* Issue write/erase enable command */
400 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
401 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
402 if (ret < 0) {
403 netdev_warn(dev->net, "Error writing E2P_DATA\n");
404 return ret;
405 }
406
407 ret = smsc95xx_wait_eeprom(dev);
408 if (ret < 0)
409 return ret;
410
411 for (i = 0; i < length; i++) {
412
413 /* Fill data register */
414 val = data[i];
415 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
416 if (ret < 0) {
417 netdev_warn(dev->net, "Error writing E2P_DATA\n");
418 return ret;
419 }
420
421 /* Send "write" command */
422 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
423 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
424 if (ret < 0) {
425 netdev_warn(dev->net, "Error writing E2P_CMD\n");
426 return ret;
427 }
428
429 ret = smsc95xx_wait_eeprom(dev);
430 if (ret < 0)
431 return ret;
432
433 offset++;
434 }
435
436 return 0;
437 }
438
439 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
440 u32 data)
441 {
442 const u16 size = 4;
443 u32 buf;
444 int ret;
445
446 buf = data;
447 cpu_to_le32s(&buf);
448
449 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
450 USB_DIR_OUT | USB_TYPE_VENDOR |
451 USB_RECIP_DEVICE,
452 0, index, &buf, size);
453 if (ret < 0)
454 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
455 ret);
456 return ret;
457 }
458
459 /* returns hash bit number for given MAC address
460 * example:
461 * 01 00 5E 00 00 01 -> returns bit number 31 */
462 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
463 {
464 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
465 }
466
467 static void smsc95xx_set_multicast(struct net_device *netdev)
468 {
469 struct usbnet *dev = netdev_priv(netdev);
470 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
471 unsigned long flags;
472 int ret;
473
474 pdata->hash_hi = 0;
475 pdata->hash_lo = 0;
476
477 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
478
479 if (dev->net->flags & IFF_PROMISC) {
480 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
481 pdata->mac_cr |= MAC_CR_PRMS_;
482 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
483 } else if (dev->net->flags & IFF_ALLMULTI) {
484 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
485 pdata->mac_cr |= MAC_CR_MCPAS_;
486 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
487 } else if (!netdev_mc_empty(dev->net)) {
488 struct netdev_hw_addr *ha;
489
490 pdata->mac_cr |= MAC_CR_HPFILT_;
491 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
492
493 netdev_for_each_mc_addr(ha, netdev) {
494 u32 bitnum = smsc95xx_hash(ha->addr);
495 u32 mask = 0x01 << (bitnum & 0x1F);
496 if (bitnum & 0x20)
497 pdata->hash_hi |= mask;
498 else
499 pdata->hash_lo |= mask;
500 }
501
502 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
503 pdata->hash_hi, pdata->hash_lo);
504 } else {
505 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
506 pdata->mac_cr &=
507 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
508 }
509
510 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
511
512 /* Initiate async writes, as we can't wait for completion here */
513 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
514 if (ret < 0)
515 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
516
517 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
518 if (ret < 0)
519 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
520
521 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
522 if (ret < 0)
523 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
524 }
525
526 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
527 u16 lcladv, u16 rmtadv)
528 {
529 u32 flow = 0, afc_cfg;
530
531 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
532 if (ret < 0)
533 return ret;
534
535 if (duplex == DUPLEX_FULL) {
536 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
537
538 if (cap & FLOW_CTRL_RX)
539 flow = 0xFFFF0002;
540
541 if (cap & FLOW_CTRL_TX) {
542 afc_cfg |= 0xF;
543 flow |= 0xFFFF0000;
544 } else {
545 afc_cfg &= ~0xF;
546 }
547
548 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
549 cap & FLOW_CTRL_RX ? "enabled" : "disabled",
550 cap & FLOW_CTRL_TX ? "enabled" : "disabled");
551 } else {
552 netif_dbg(dev, link, dev->net, "half duplex\n");
553 afc_cfg |= 0xF;
554 }
555
556 ret = smsc95xx_write_reg(dev, FLOW, flow);
557 if (ret < 0)
558 return ret;
559
560 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
561 }
562
563 static int smsc95xx_link_reset(struct usbnet *dev)
564 {
565 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
566 struct mii_if_info *mii = &dev->mii;
567 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
568 unsigned long flags;
569 u16 lcladv, rmtadv;
570 int ret;
571
572 /* clear interrupt status */
573 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
574 if (ret < 0)
575 return ret;
576
577 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
578 if (ret < 0)
579 return ret;
580
581 mii_check_media(mii, 1, 1);
582 mii_ethtool_gset(&dev->mii, &ecmd);
583 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
584 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
585
586 netif_dbg(dev, link, dev->net,
587 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
588 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
589
590 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
591 if (ecmd.duplex != DUPLEX_FULL) {
592 pdata->mac_cr &= ~MAC_CR_FDPX_;
593 pdata->mac_cr |= MAC_CR_RCVOWN_;
594 } else {
595 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
596 pdata->mac_cr |= MAC_CR_FDPX_;
597 }
598 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
599
600 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
601 if (ret < 0)
602 return ret;
603
604 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
605 if (ret < 0)
606 netdev_warn(dev->net, "Error updating PHY flow control\n");
607
608 return ret;
609 }
610
611 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
612 {
613 u32 intdata;
614
615 if (urb->actual_length != 4) {
616 netdev_warn(dev->net, "unexpected urb length %d\n",
617 urb->actual_length);
618 return;
619 }
620
621 memcpy(&intdata, urb->transfer_buffer, 4);
622 le32_to_cpus(&intdata);
623
624 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
625
626 if (intdata & INT_ENP_PHY_INT_)
627 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
628 else
629 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
630 intdata);
631 }
632
633 static void set_carrier(struct usbnet *dev, bool link)
634 {
635 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
636
637 if (pdata->link_ok == link)
638 return;
639
640 pdata->link_ok = link;
641
642 if (link)
643 usbnet_link_change(dev, 1, 0);
644 else
645 usbnet_link_change(dev, 0, 0);
646 }
647
648 static void check_carrier(struct work_struct *work)
649 {
650 struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
651 carrier_check.work);
652 struct usbnet *dev = pdata->dev;
653 int ret;
654
655 if (pdata->suspend_flags != 0)
656 return;
657
658 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
659 if (ret < 0) {
660 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
661 return;
662 }
663 if (ret & BMSR_LSTATUS)
664 set_carrier(dev, 1);
665 else
666 set_carrier(dev, 0);
667
668 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
669 }
670
671 /* Enable or disable Tx & Rx checksum offload engines */
672 static int smsc95xx_set_features(struct net_device *netdev,
673 netdev_features_t features)
674 {
675 struct usbnet *dev = netdev_priv(netdev);
676 u32 read_buf;
677 int ret;
678
679 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
680 if (ret < 0)
681 return ret;
682
683 if (features & NETIF_F_IP_CSUM)
684 read_buf |= Tx_COE_EN_;
685 else
686 read_buf &= ~Tx_COE_EN_;
687
688 if (features & NETIF_F_RXCSUM)
689 read_buf |= Rx_COE_EN_;
690 else
691 read_buf &= ~Rx_COE_EN_;
692
693 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
694 if (ret < 0)
695 return ret;
696
697 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
698 return 0;
699 }
700
701 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
702 {
703 return MAX_EEPROM_SIZE;
704 }
705
706 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
707 struct ethtool_eeprom *ee, u8 *data)
708 {
709 struct usbnet *dev = netdev_priv(netdev);
710
711 ee->magic = LAN95XX_EEPROM_MAGIC;
712
713 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
714 }
715
716 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
717 struct ethtool_eeprom *ee, u8 *data)
718 {
719 struct usbnet *dev = netdev_priv(netdev);
720
721 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
722 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
723 ee->magic);
724 return -EINVAL;
725 }
726
727 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
728 }
729
730 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
731 {
732 /* all smsc95xx registers */
733 return COE_CR - ID_REV + sizeof(u32);
734 }
735
736 static void
737 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
738 void *buf)
739 {
740 struct usbnet *dev = netdev_priv(netdev);
741 unsigned int i, j;
742 int retval;
743 u32 *data = buf;
744
745 retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
746 if (retval < 0) {
747 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
748 return;
749 }
750
751 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
752 retval = smsc95xx_read_reg(dev, i, &data[j]);
753 if (retval < 0) {
754 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
755 return;
756 }
757 }
758 }
759
760 static void smsc95xx_ethtool_get_wol(struct net_device *net,
761 struct ethtool_wolinfo *wolinfo)
762 {
763 struct usbnet *dev = netdev_priv(net);
764 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
765
766 wolinfo->supported = SUPPORTED_WAKE;
767 wolinfo->wolopts = pdata->wolopts;
768 }
769
770 static int smsc95xx_ethtool_set_wol(struct net_device *net,
771 struct ethtool_wolinfo *wolinfo)
772 {
773 struct usbnet *dev = netdev_priv(net);
774 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
775 int ret;
776
777 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
778 return -EINVAL;
779
780 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
781
782 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
783 if (ret < 0)
784 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
785
786 return ret;
787 }
788
789 static int get_mdix_status(struct net_device *net)
790 {
791 struct usbnet *dev = netdev_priv(net);
792 u32 val;
793 int buf;
794
795 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
796 if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
797 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
798 return ETH_TP_MDI_AUTO;
799 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
800 return ETH_TP_MDI_X;
801 } else {
802 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
803 if (val & STRAP_STATUS_AMDIX_EN_)
804 return ETH_TP_MDI_AUTO;
805 }
806
807 return ETH_TP_MDI;
808 }
809
810 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
811 {
812 struct usbnet *dev = netdev_priv(net);
813 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
814 int buf;
815
816 if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
817 (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
818 (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
819 (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
820 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
821 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
822 PHY_EDPD_CONFIG);
823 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
824 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
825 PHY_EDPD_CONFIG, buf);
826 }
827
828 if (mdix_ctrl == ETH_TP_MDI) {
829 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
830 SPECIAL_CTRL_STS);
831 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
832 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
833 SPECIAL_CTRL_STS_AMDIX_STATE_);
834 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
835 SPECIAL_CTRL_STS, buf);
836 } else if (mdix_ctrl == ETH_TP_MDI_X) {
837 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
838 SPECIAL_CTRL_STS);
839 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
840 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
841 SPECIAL_CTRL_STS_AMDIX_STATE_);
842 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
843 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
844 SPECIAL_CTRL_STS, buf);
845 } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
846 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
847 SPECIAL_CTRL_STS);
848 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
849 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
850 SPECIAL_CTRL_STS_AMDIX_STATE_);
851 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
852 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
853 SPECIAL_CTRL_STS, buf);
854 }
855 pdata->mdix_ctrl = mdix_ctrl;
856 }
857
858 static int smsc95xx_get_link_ksettings(struct net_device *net,
859 struct ethtool_link_ksettings *cmd)
860 {
861 struct usbnet *dev = netdev_priv(net);
862 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
863 int retval;
864
865 retval = usbnet_get_link_ksettings(net, cmd);
866
867 cmd->base.eth_tp_mdix = pdata->mdix_ctrl;
868 cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl;
869
870 return retval;
871 }
872
873 static int smsc95xx_set_link_ksettings(struct net_device *net,
874 const struct ethtool_link_ksettings *cmd)
875 {
876 struct usbnet *dev = netdev_priv(net);
877 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
878 int retval;
879
880 if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl)
881 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl);
882
883 retval = usbnet_set_link_ksettings(net, cmd);
884
885 return retval;
886 }
887
888 static const struct ethtool_ops smsc95xx_ethtool_ops = {
889 .get_link = usbnet_get_link,
890 .nway_reset = usbnet_nway_reset,
891 .get_drvinfo = usbnet_get_drvinfo,
892 .get_msglevel = usbnet_get_msglevel,
893 .set_msglevel = usbnet_set_msglevel,
894 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
895 .get_eeprom = smsc95xx_ethtool_get_eeprom,
896 .set_eeprom = smsc95xx_ethtool_set_eeprom,
897 .get_regs_len = smsc95xx_ethtool_getregslen,
898 .get_regs = smsc95xx_ethtool_getregs,
899 .get_wol = smsc95xx_ethtool_get_wol,
900 .set_wol = smsc95xx_ethtool_set_wol,
901 .get_link_ksettings = smsc95xx_get_link_ksettings,
902 .set_link_ksettings = smsc95xx_set_link_ksettings,
903 .get_ts_info = ethtool_op_get_ts_info,
904 };
905
906 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
907 {
908 struct usbnet *dev = netdev_priv(netdev);
909
910 if (!netif_running(netdev))
911 return -EINVAL;
912
913 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
914 }
915
916 static void smsc95xx_init_mac_address(struct usbnet *dev)
917 {
918 const u8 *mac_addr;
919
920 /* maybe the boot loader passed the MAC address in devicetree */
921 mac_addr = of_get_mac_address(dev->udev->dev.of_node);
922 if (mac_addr) {
923 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
924 return;
925 }
926
927 /* try reading mac address from EEPROM */
928 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
929 dev->net->dev_addr) == 0) {
930 if (is_valid_ether_addr(dev->net->dev_addr)) {
931 /* eeprom values are valid so use them */
932 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
933 return;
934 }
935 }
936
937 /* no useful static MAC address found. generate a random one */
938 eth_hw_addr_random(dev->net);
939 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
940 }
941
942 static int smsc95xx_set_mac_address(struct usbnet *dev)
943 {
944 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
945 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
946 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
947 int ret;
948
949 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
950 if (ret < 0)
951 return ret;
952
953 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
954 }
955
956 /* starts the TX path */
957 static int smsc95xx_start_tx_path(struct usbnet *dev)
958 {
959 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
960 unsigned long flags;
961 int ret;
962
963 /* Enable Tx at MAC */
964 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
965 pdata->mac_cr |= MAC_CR_TXEN_;
966 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
967
968 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
969 if (ret < 0)
970 return ret;
971
972 /* Enable Tx at SCSRs */
973 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
974 }
975
976 /* Starts the Receive path */
977 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
978 {
979 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
980 unsigned long flags;
981
982 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
983 pdata->mac_cr |= MAC_CR_RXEN_;
984 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
985
986 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
987 }
988
989 static int smsc95xx_phy_initialize(struct usbnet *dev)
990 {
991 int bmcr, ret, timeout = 0;
992
993 /* Initialize MII structure */
994 dev->mii.dev = dev->net;
995 dev->mii.mdio_read = smsc95xx_mdio_read;
996 dev->mii.mdio_write = smsc95xx_mdio_write;
997 dev->mii.phy_id_mask = 0x1f;
998 dev->mii.reg_num_mask = 0x1f;
999 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
1000
1001 /* reset phy and wait for reset to complete */
1002 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1003
1004 do {
1005 msleep(10);
1006 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
1007 timeout++;
1008 } while ((bmcr & BMCR_RESET) && (timeout < 100));
1009
1010 if (timeout >= 100) {
1011 netdev_warn(dev->net, "timeout on PHY Reset");
1012 return -EIO;
1013 }
1014
1015 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1016 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1017 ADVERTISE_PAUSE_ASYM);
1018
1019 /* read to clear */
1020 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1021 if (ret < 0) {
1022 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1023 return ret;
1024 }
1025
1026 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1027 PHY_INT_MASK_DEFAULT_);
1028 mii_nway_restart(&dev->mii);
1029
1030 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1031 return 0;
1032 }
1033
1034 static int smsc95xx_reset(struct usbnet *dev)
1035 {
1036 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1037 u32 read_buf, write_buf, burst_cap;
1038 int ret = 0, timeout;
1039
1040 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1041
1042 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1043 if (ret < 0)
1044 return ret;
1045
1046 timeout = 0;
1047 do {
1048 msleep(10);
1049 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1050 if (ret < 0)
1051 return ret;
1052 timeout++;
1053 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1054
1055 if (timeout >= 100) {
1056 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1057 return ret;
1058 }
1059
1060 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1061 if (ret < 0)
1062 return ret;
1063
1064 timeout = 0;
1065 do {
1066 msleep(10);
1067 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1068 if (ret < 0)
1069 return ret;
1070 timeout++;
1071 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1072
1073 if (timeout >= 100) {
1074 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1075 return ret;
1076 }
1077
1078 ret = smsc95xx_set_mac_address(dev);
1079 if (ret < 0)
1080 return ret;
1081
1082 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1083 dev->net->dev_addr);
1084
1085 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1086 if (ret < 0)
1087 return ret;
1088
1089 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1090 read_buf);
1091
1092 read_buf |= HW_CFG_BIR_;
1093
1094 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1095 if (ret < 0)
1096 return ret;
1097
1098 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1099 if (ret < 0)
1100 return ret;
1101
1102 netif_dbg(dev, ifup, dev->net,
1103 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1104 read_buf);
1105
1106 if (!turbo_mode) {
1107 burst_cap = 0;
1108 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1109 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1110 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1111 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1112 } else {
1113 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1114 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1115 }
1116
1117 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1118 (ulong)dev->rx_urb_size);
1119
1120 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1121 if (ret < 0)
1122 return ret;
1123
1124 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1125 if (ret < 0)
1126 return ret;
1127
1128 netif_dbg(dev, ifup, dev->net,
1129 "Read Value from BURST_CAP after writing: 0x%08x\n",
1130 read_buf);
1131
1132 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1133 if (ret < 0)
1134 return ret;
1135
1136 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1137 if (ret < 0)
1138 return ret;
1139
1140 netif_dbg(dev, ifup, dev->net,
1141 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1142 read_buf);
1143
1144 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1145 if (ret < 0)
1146 return ret;
1147
1148 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1149 read_buf);
1150
1151 if (turbo_mode)
1152 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1153
1154 read_buf &= ~HW_CFG_RXDOFF_;
1155
1156 /* set Rx data offset=2, Make IP header aligns on word boundary. */
1157 read_buf |= NET_IP_ALIGN << 9;
1158
1159 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1160 if (ret < 0)
1161 return ret;
1162
1163 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1164 if (ret < 0)
1165 return ret;
1166
1167 netif_dbg(dev, ifup, dev->net,
1168 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1169
1170 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1171 if (ret < 0)
1172 return ret;
1173
1174 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1175 if (ret < 0)
1176 return ret;
1177 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1178
1179 /* Configure GPIO pins as LED outputs */
1180 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1181 LED_GPIO_CFG_FDX_LED;
1182 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1183 if (ret < 0)
1184 return ret;
1185
1186 /* Init Tx */
1187 ret = smsc95xx_write_reg(dev, FLOW, 0);
1188 if (ret < 0)
1189 return ret;
1190
1191 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1192 if (ret < 0)
1193 return ret;
1194
1195 /* Don't need mac_cr_lock during initialisation */
1196 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1197 if (ret < 0)
1198 return ret;
1199
1200 /* Init Rx */
1201 /* Set Vlan */
1202 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1203 if (ret < 0)
1204 return ret;
1205
1206 /* Enable or disable checksum offload engines */
1207 ret = smsc95xx_set_features(dev->net, dev->net->features);
1208 if (ret < 0) {
1209 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1210 return ret;
1211 }
1212
1213 smsc95xx_set_multicast(dev->net);
1214
1215 ret = smsc95xx_phy_initialize(dev);
1216 if (ret < 0) {
1217 netdev_warn(dev->net, "Failed to init PHY\n");
1218 return ret;
1219 }
1220
1221 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1222 if (ret < 0)
1223 return ret;
1224
1225 /* enable PHY interrupts */
1226 read_buf |= INT_EP_CTL_PHY_INT_;
1227
1228 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1229 if (ret < 0)
1230 return ret;
1231
1232 ret = smsc95xx_start_tx_path(dev);
1233 if (ret < 0) {
1234 netdev_warn(dev->net, "Failed to start TX path\n");
1235 return ret;
1236 }
1237
1238 ret = smsc95xx_start_rx_path(dev, 0);
1239 if (ret < 0) {
1240 netdev_warn(dev->net, "Failed to start RX path\n");
1241 return ret;
1242 }
1243
1244 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1245 return 0;
1246 }
1247
1248 static const struct net_device_ops smsc95xx_netdev_ops = {
1249 .ndo_open = usbnet_open,
1250 .ndo_stop = usbnet_stop,
1251 .ndo_start_xmit = usbnet_start_xmit,
1252 .ndo_tx_timeout = usbnet_tx_timeout,
1253 .ndo_change_mtu = usbnet_change_mtu,
1254 .ndo_get_stats64 = usbnet_get_stats64,
1255 .ndo_set_mac_address = eth_mac_addr,
1256 .ndo_validate_addr = eth_validate_addr,
1257 .ndo_do_ioctl = smsc95xx_ioctl,
1258 .ndo_set_rx_mode = smsc95xx_set_multicast,
1259 .ndo_set_features = smsc95xx_set_features,
1260 };
1261
1262 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1263 {
1264 struct smsc95xx_priv *pdata = NULL;
1265 u32 val;
1266 int ret;
1267
1268 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1269
1270 ret = usbnet_get_endpoints(dev, intf);
1271 if (ret < 0) {
1272 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1273 return ret;
1274 }
1275
1276 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1277 GFP_KERNEL);
1278
1279 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1280 if (!pdata)
1281 return -ENOMEM;
1282
1283 spin_lock_init(&pdata->mac_cr_lock);
1284
1285 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1286 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1287 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1288 * it is transmitted as all ones. The zero transmitted checksum means
1289 * transmitter generated no checksum. Hence, enable csum offload only
1290 * for ipv4 packets.
1291 */
1292 if (DEFAULT_TX_CSUM_ENABLE)
1293 dev->net->features |= NETIF_F_IP_CSUM;
1294 if (DEFAULT_RX_CSUM_ENABLE)
1295 dev->net->features |= NETIF_F_RXCSUM;
1296
1297 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1298
1299 smsc95xx_init_mac_address(dev);
1300
1301 /* Init all registers */
1302 ret = smsc95xx_reset(dev);
1303
1304 /* detect device revision as different features may be available */
1305 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1306 if (ret < 0)
1307 return ret;
1308 val >>= 16;
1309 pdata->chip_id = val;
1310 pdata->mdix_ctrl = get_mdix_status(dev->net);
1311
1312 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1313 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1314 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1315 FEATURE_PHY_NLP_CROSSOVER |
1316 FEATURE_REMOTE_WAKEUP);
1317 else if (val == ID_REV_CHIP_ID_9512_)
1318 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1319
1320 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1321 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1322 dev->net->flags |= IFF_MULTICAST;
1323 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1324 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1325
1326 pdata->dev = dev;
1327 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1328 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1329
1330 return 0;
1331 }
1332
1333 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1334 {
1335 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1336
1337 if (pdata) {
1338 cancel_delayed_work(&pdata->carrier_check);
1339 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1340 kfree(pdata);
1341 pdata = NULL;
1342 dev->data[0] = 0;
1343 }
1344 }
1345
1346 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1347 {
1348 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1349 return crc << ((filter % 2) * 16);
1350 }
1351
1352 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1353 {
1354 struct mii_if_info *mii = &dev->mii;
1355 int ret;
1356
1357 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1358
1359 /* read to clear */
1360 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1361 if (ret < 0)
1362 return ret;
1363
1364 /* enable interrupt source */
1365 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1366 if (ret < 0)
1367 return ret;
1368
1369 ret |= mask;
1370
1371 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1372
1373 return 0;
1374 }
1375
1376 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1377 {
1378 struct mii_if_info *mii = &dev->mii;
1379 int ret;
1380
1381 /* first, a dummy read, needed to latch some MII phys */
1382 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1383 if (ret < 0)
1384 return ret;
1385
1386 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1387 if (ret < 0)
1388 return ret;
1389
1390 return !!(ret & BMSR_LSTATUS);
1391 }
1392
1393 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1394 {
1395 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1396 u32 val;
1397 int ret;
1398
1399 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1400 if (ret < 0)
1401 return ret;
1402
1403 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1404 val |= PM_CTL_SUS_MODE_0;
1405
1406 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1407 if (ret < 0)
1408 return ret;
1409
1410 /* clear wol status */
1411 val &= ~PM_CTL_WUPS_;
1412 val |= PM_CTL_WUPS_WOL_;
1413
1414 /* enable energy detection */
1415 if (pdata->wolopts & WAKE_PHY)
1416 val |= PM_CTL_WUPS_ED_;
1417
1418 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1419 if (ret < 0)
1420 return ret;
1421
1422 /* read back PM_CTRL */
1423 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1424 if (ret < 0)
1425 return ret;
1426
1427 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1428
1429 return 0;
1430 }
1431
1432 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1433 {
1434 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1435 struct mii_if_info *mii = &dev->mii;
1436 u32 val;
1437 int ret;
1438
1439 /* reconfigure link pulse detection timing for
1440 * compatibility with non-standard link partners
1441 */
1442 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1443 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1444 PHY_EDPD_CONFIG_DEFAULT);
1445
1446 /* enable energy detect power-down mode */
1447 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1448 if (ret < 0)
1449 return ret;
1450
1451 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1452
1453 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1454
1455 /* enter SUSPEND1 mode */
1456 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1457 if (ret < 0)
1458 return ret;
1459
1460 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1461 val |= PM_CTL_SUS_MODE_1;
1462
1463 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1464 if (ret < 0)
1465 return ret;
1466
1467 /* clear wol status, enable energy detection */
1468 val &= ~PM_CTL_WUPS_;
1469 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1470
1471 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1472 if (ret < 0)
1473 return ret;
1474
1475 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1476
1477 return 0;
1478 }
1479
1480 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1481 {
1482 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1483 u32 val;
1484 int ret;
1485
1486 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1487 if (ret < 0)
1488 return ret;
1489
1490 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1491 val |= PM_CTL_SUS_MODE_2;
1492
1493 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1494 if (ret < 0)
1495 return ret;
1496
1497 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1498
1499 return 0;
1500 }
1501
1502 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1503 {
1504 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1505 u32 val;
1506 int ret;
1507
1508 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1509 if (ret < 0)
1510 return ret;
1511
1512 if (val & RX_FIFO_INF_USED_) {
1513 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1514 return -EBUSY;
1515 }
1516
1517 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1518 if (ret < 0)
1519 return ret;
1520
1521 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1522 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1523
1524 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1525 if (ret < 0)
1526 return ret;
1527
1528 /* clear wol status */
1529 val &= ~PM_CTL_WUPS_;
1530 val |= PM_CTL_WUPS_WOL_;
1531
1532 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1533 if (ret < 0)
1534 return ret;
1535
1536 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1537
1538 return 0;
1539 }
1540
1541 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1542 {
1543 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1544 int ret;
1545
1546 if (!netif_running(dev->net)) {
1547 /* interface is ifconfig down so fully power down hw */
1548 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1549 return smsc95xx_enter_suspend2(dev);
1550 }
1551
1552 if (!link_up) {
1553 /* link is down so enter EDPD mode, but only if device can
1554 * reliably resume from it. This check should be redundant
1555 * as current FEATURE_REMOTE_WAKEUP parts also support
1556 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1557 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1558 netdev_warn(dev->net, "EDPD not supported\n");
1559 return -EBUSY;
1560 }
1561
1562 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1563
1564 /* enable PHY wakeup events for if cable is attached */
1565 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1566 PHY_INT_MASK_ANEG_COMP_);
1567 if (ret < 0) {
1568 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1569 return ret;
1570 }
1571
1572 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1573 return smsc95xx_enter_suspend1(dev);
1574 }
1575
1576 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1577 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1578 PHY_INT_MASK_LINK_DOWN_);
1579 if (ret < 0) {
1580 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1581 return ret;
1582 }
1583
1584 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1585 return smsc95xx_enter_suspend3(dev);
1586 }
1587
1588 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1589 {
1590 struct usbnet *dev = usb_get_intfdata(intf);
1591 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1592 u32 val, link_up;
1593 int ret;
1594
1595 ret = usbnet_suspend(intf, message);
1596 if (ret < 0) {
1597 netdev_warn(dev->net, "usbnet_suspend error\n");
1598 return ret;
1599 }
1600
1601 if (pdata->suspend_flags) {
1602 netdev_warn(dev->net, "error during last resume\n");
1603 pdata->suspend_flags = 0;
1604 }
1605
1606 /* determine if link is up using only _nopm functions */
1607 link_up = smsc95xx_link_ok_nopm(dev);
1608
1609 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1610 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1611 ret = smsc95xx_autosuspend(dev, link_up);
1612 goto done;
1613 }
1614
1615 /* if we get this far we're not autosuspending */
1616 /* if no wol options set, or if link is down and we're not waking on
1617 * PHY activity, enter lowest power SUSPEND2 mode
1618 */
1619 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1620 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1621 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1622
1623 /* disable energy detect (link up) & wake up events */
1624 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1625 if (ret < 0)
1626 goto done;
1627
1628 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1629
1630 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1631 if (ret < 0)
1632 goto done;
1633
1634 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1635 if (ret < 0)
1636 goto done;
1637
1638 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1639
1640 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1641 if (ret < 0)
1642 goto done;
1643
1644 ret = smsc95xx_enter_suspend2(dev);
1645 goto done;
1646 }
1647
1648 if (pdata->wolopts & WAKE_PHY) {
1649 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1650 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1651 if (ret < 0) {
1652 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1653 goto done;
1654 }
1655
1656 /* if link is down then configure EDPD and enter SUSPEND1,
1657 * otherwise enter SUSPEND0 below
1658 */
1659 if (!link_up) {
1660 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1661 ret = smsc95xx_enter_suspend1(dev);
1662 goto done;
1663 }
1664 }
1665
1666 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1667 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1668 u32 command[2];
1669 u32 offset[2];
1670 u32 crc[4];
1671 int wuff_filter_count =
1672 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1673 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1674 int i, filter = 0;
1675
1676 if (!filter_mask) {
1677 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1678 ret = -ENOMEM;
1679 goto done;
1680 }
1681
1682 memset(command, 0, sizeof(command));
1683 memset(offset, 0, sizeof(offset));
1684 memset(crc, 0, sizeof(crc));
1685
1686 if (pdata->wolopts & WAKE_BCAST) {
1687 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1688 netdev_info(dev->net, "enabling broadcast detection\n");
1689 filter_mask[filter * 4] = 0x003F;
1690 filter_mask[filter * 4 + 1] = 0x00;
1691 filter_mask[filter * 4 + 2] = 0x00;
1692 filter_mask[filter * 4 + 3] = 0x00;
1693 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1694 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1695 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1696 filter++;
1697 }
1698
1699 if (pdata->wolopts & WAKE_MCAST) {
1700 const u8 mcast[] = {0x01, 0x00, 0x5E};
1701 netdev_info(dev->net, "enabling multicast detection\n");
1702 filter_mask[filter * 4] = 0x0007;
1703 filter_mask[filter * 4 + 1] = 0x00;
1704 filter_mask[filter * 4 + 2] = 0x00;
1705 filter_mask[filter * 4 + 3] = 0x00;
1706 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1707 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1708 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1709 filter++;
1710 }
1711
1712 if (pdata->wolopts & WAKE_ARP) {
1713 const u8 arp[] = {0x08, 0x06};
1714 netdev_info(dev->net, "enabling ARP detection\n");
1715 filter_mask[filter * 4] = 0x0003;
1716 filter_mask[filter * 4 + 1] = 0x00;
1717 filter_mask[filter * 4 + 2] = 0x00;
1718 filter_mask[filter * 4 + 3] = 0x00;
1719 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1720 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1721 crc[filter/2] |= smsc_crc(arp, 2, filter);
1722 filter++;
1723 }
1724
1725 if (pdata->wolopts & WAKE_UCAST) {
1726 netdev_info(dev->net, "enabling unicast detection\n");
1727 filter_mask[filter * 4] = 0x003F;
1728 filter_mask[filter * 4 + 1] = 0x00;
1729 filter_mask[filter * 4 + 2] = 0x00;
1730 filter_mask[filter * 4 + 3] = 0x00;
1731 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1732 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1733 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1734 filter++;
1735 }
1736
1737 for (i = 0; i < (wuff_filter_count * 4); i++) {
1738 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1739 if (ret < 0) {
1740 kfree(filter_mask);
1741 goto done;
1742 }
1743 }
1744 kfree(filter_mask);
1745
1746 for (i = 0; i < (wuff_filter_count / 4); i++) {
1747 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1748 if (ret < 0)
1749 goto done;
1750 }
1751
1752 for (i = 0; i < (wuff_filter_count / 4); i++) {
1753 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1754 if (ret < 0)
1755 goto done;
1756 }
1757
1758 for (i = 0; i < (wuff_filter_count / 2); i++) {
1759 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1760 if (ret < 0)
1761 goto done;
1762 }
1763
1764 /* clear any pending pattern match packet status */
1765 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1766 if (ret < 0)
1767 goto done;
1768
1769 val |= WUCSR_WUFR_;
1770
1771 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1772 if (ret < 0)
1773 goto done;
1774 }
1775
1776 if (pdata->wolopts & WAKE_MAGIC) {
1777 /* clear any pending magic packet status */
1778 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1779 if (ret < 0)
1780 goto done;
1781
1782 val |= WUCSR_MPR_;
1783
1784 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1785 if (ret < 0)
1786 goto done;
1787 }
1788
1789 /* enable/disable wakeup sources */
1790 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1791 if (ret < 0)
1792 goto done;
1793
1794 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1795 netdev_info(dev->net, "enabling pattern match wakeup\n");
1796 val |= WUCSR_WAKE_EN_;
1797 } else {
1798 netdev_info(dev->net, "disabling pattern match wakeup\n");
1799 val &= ~WUCSR_WAKE_EN_;
1800 }
1801
1802 if (pdata->wolopts & WAKE_MAGIC) {
1803 netdev_info(dev->net, "enabling magic packet wakeup\n");
1804 val |= WUCSR_MPEN_;
1805 } else {
1806 netdev_info(dev->net, "disabling magic packet wakeup\n");
1807 val &= ~WUCSR_MPEN_;
1808 }
1809
1810 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1811 if (ret < 0)
1812 goto done;
1813
1814 /* enable wol wakeup source */
1815 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1816 if (ret < 0)
1817 goto done;
1818
1819 val |= PM_CTL_WOL_EN_;
1820
1821 /* phy energy detect wakeup source */
1822 if (pdata->wolopts & WAKE_PHY)
1823 val |= PM_CTL_ED_EN_;
1824
1825 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1826 if (ret < 0)
1827 goto done;
1828
1829 /* enable receiver to enable frame reception */
1830 smsc95xx_start_rx_path(dev, 1);
1831
1832 /* some wol options are enabled, so enter SUSPEND0 */
1833 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1834 ret = smsc95xx_enter_suspend0(dev);
1835
1836 done:
1837 /*
1838 * TODO: resume() might need to handle the suspend failure
1839 * in system sleep
1840 */
1841 if (ret && PMSG_IS_AUTO(message))
1842 usbnet_resume(intf);
1843 return ret;
1844 }
1845
1846 static int smsc95xx_resume(struct usb_interface *intf)
1847 {
1848 struct usbnet *dev = usb_get_intfdata(intf);
1849 struct smsc95xx_priv *pdata;
1850 u8 suspend_flags;
1851 int ret;
1852 u32 val;
1853
1854 BUG_ON(!dev);
1855 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1856 suspend_flags = pdata->suspend_flags;
1857
1858 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1859
1860 /* do this first to ensure it's cleared even in error case */
1861 pdata->suspend_flags = 0;
1862 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1863
1864 if (suspend_flags & SUSPEND_ALLMODES) {
1865 /* clear wake-up sources */
1866 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1867 if (ret < 0)
1868 return ret;
1869
1870 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1871
1872 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1873 if (ret < 0)
1874 return ret;
1875
1876 /* clear wake-up status */
1877 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1878 if (ret < 0)
1879 return ret;
1880
1881 val &= ~PM_CTL_WOL_EN_;
1882 val |= PM_CTL_WUPS_;
1883
1884 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1885 if (ret < 0)
1886 return ret;
1887 }
1888
1889 ret = usbnet_resume(intf);
1890 if (ret < 0)
1891 netdev_warn(dev->net, "usbnet_resume error\n");
1892
1893 return ret;
1894 }
1895
1896 static int smsc95xx_reset_resume(struct usb_interface *intf)
1897 {
1898 struct usbnet *dev = usb_get_intfdata(intf);
1899 int ret;
1900
1901 ret = smsc95xx_reset(dev);
1902 if (ret < 0)
1903 return ret;
1904
1905 return smsc95xx_resume(intf);
1906 }
1907
1908 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1909 {
1910 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1911 skb->ip_summed = CHECKSUM_COMPLETE;
1912 skb_trim(skb, skb->len - 2);
1913 }
1914
1915 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1916 {
1917 /* This check is no longer done by usbnet */
1918 if (skb->len < dev->net->hard_header_len)
1919 return 0;
1920
1921 while (skb->len > 0) {
1922 u32 header, align_count;
1923 struct sk_buff *ax_skb;
1924 unsigned char *packet;
1925 u16 size;
1926
1927 memcpy(&header, skb->data, sizeof(header));
1928 le32_to_cpus(&header);
1929 skb_pull(skb, 4 + NET_IP_ALIGN);
1930 packet = skb->data;
1931
1932 /* get the packet length */
1933 size = (u16)((header & RX_STS_FL_) >> 16);
1934 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1935
1936 if (unlikely(header & RX_STS_ES_)) {
1937 netif_dbg(dev, rx_err, dev->net,
1938 "Error header=0x%08x\n", header);
1939 dev->net->stats.rx_errors++;
1940 dev->net->stats.rx_dropped++;
1941
1942 if (header & RX_STS_CRC_) {
1943 dev->net->stats.rx_crc_errors++;
1944 } else {
1945 if (header & (RX_STS_TL_ | RX_STS_RF_))
1946 dev->net->stats.rx_frame_errors++;
1947
1948 if ((header & RX_STS_LE_) &&
1949 (!(header & RX_STS_FT_)))
1950 dev->net->stats.rx_length_errors++;
1951 }
1952 } else {
1953 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1954 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1955 netif_dbg(dev, rx_err, dev->net,
1956 "size err header=0x%08x\n", header);
1957 return 0;
1958 }
1959
1960 /* last frame in this batch */
1961 if (skb->len == size) {
1962 if (dev->net->features & NETIF_F_RXCSUM)
1963 smsc95xx_rx_csum_offload(skb);
1964 skb_trim(skb, skb->len - 4); /* remove fcs */
1965 skb->truesize = size + sizeof(struct sk_buff);
1966
1967 return 1;
1968 }
1969
1970 ax_skb = skb_clone(skb, GFP_ATOMIC);
1971 if (unlikely(!ax_skb)) {
1972 netdev_warn(dev->net, "Error allocating skb\n");
1973 return 0;
1974 }
1975
1976 ax_skb->len = size;
1977 ax_skb->data = packet;
1978 skb_set_tail_pointer(ax_skb, size);
1979
1980 if (dev->net->features & NETIF_F_RXCSUM)
1981 smsc95xx_rx_csum_offload(ax_skb);
1982 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1983 ax_skb->truesize = size + sizeof(struct sk_buff);
1984
1985 usbnet_skb_return(dev, ax_skb);
1986 }
1987
1988 skb_pull(skb, size);
1989
1990 /* padding bytes before the next frame starts */
1991 if (skb->len)
1992 skb_pull(skb, align_count);
1993 }
1994
1995 return 1;
1996 }
1997
1998 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1999 {
2000 u16 low_16 = (u16)skb_checksum_start_offset(skb);
2001 u16 high_16 = low_16 + skb->csum_offset;
2002 return (high_16 << 16) | low_16;
2003 }
2004
2005 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
2006 struct sk_buff *skb, gfp_t flags)
2007 {
2008 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2009 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2010 u32 tx_cmd_a, tx_cmd_b;
2011
2012 /* We do not advertise SG, so skbs should be already linearized */
2013 BUG_ON(skb_shinfo(skb)->nr_frags);
2014
2015 /* Make writable and expand header space by overhead if required */
2016 if (skb_cow_head(skb, overhead)) {
2017 /* Must deallocate here as returning NULL to indicate error
2018 * means the skb won't be deallocated in the caller.
2019 */
2020 dev_kfree_skb_any(skb);
2021 return NULL;
2022 }
2023
2024 if (csum) {
2025 if (skb->len <= 45) {
2026 /* workaround - hardware tx checksum does not work
2027 * properly with extremely small packets */
2028 long csstart = skb_checksum_start_offset(skb);
2029 __wsum calc = csum_partial(skb->data + csstart,
2030 skb->len - csstart, 0);
2031 *((__sum16 *)(skb->data + csstart
2032 + skb->csum_offset)) = csum_fold(calc);
2033
2034 csum = false;
2035 } else {
2036 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2037 skb_push(skb, 4);
2038 cpu_to_le32s(&csum_preamble);
2039 memcpy(skb->data, &csum_preamble, 4);
2040 }
2041 }
2042
2043 skb_push(skb, 4);
2044 tx_cmd_b = (u32)(skb->len - 4);
2045 if (csum)
2046 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2047 cpu_to_le32s(&tx_cmd_b);
2048 memcpy(skb->data, &tx_cmd_b, 4);
2049
2050 skb_push(skb, 4);
2051 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2052 TX_CMD_A_LAST_SEG_;
2053 cpu_to_le32s(&tx_cmd_a);
2054 memcpy(skb->data, &tx_cmd_a, 4);
2055
2056 return skb;
2057 }
2058
2059 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2060 {
2061 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2062
2063 dev->intf->needs_remote_wakeup = on;
2064
2065 if (pdata->features & FEATURE_REMOTE_WAKEUP)
2066 return 0;
2067
2068 /* this chip revision isn't capable of remote wakeup */
2069 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2070
2071 if (on)
2072 usb_autopm_get_interface_no_resume(dev->intf);
2073 else
2074 usb_autopm_put_interface(dev->intf);
2075
2076 return 0;
2077 }
2078
2079 static const struct driver_info smsc95xx_info = {
2080 .description = "smsc95xx USB 2.0 Ethernet",
2081 .bind = smsc95xx_bind,
2082 .unbind = smsc95xx_unbind,
2083 .link_reset = smsc95xx_link_reset,
2084 .reset = smsc95xx_reset,
2085 .rx_fixup = smsc95xx_rx_fixup,
2086 .tx_fixup = smsc95xx_tx_fixup,
2087 .status = smsc95xx_status,
2088 .manage_power = smsc95xx_manage_power,
2089 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2090 };
2091
2092 static const struct usb_device_id products[] = {
2093 {
2094 /* SMSC9500 USB Ethernet Device */
2095 USB_DEVICE(0x0424, 0x9500),
2096 .driver_info = (unsigned long) &smsc95xx_info,
2097 },
2098 {
2099 /* SMSC9505 USB Ethernet Device */
2100 USB_DEVICE(0x0424, 0x9505),
2101 .driver_info = (unsigned long) &smsc95xx_info,
2102 },
2103 {
2104 /* SMSC9500A USB Ethernet Device */
2105 USB_DEVICE(0x0424, 0x9E00),
2106 .driver_info = (unsigned long) &smsc95xx_info,
2107 },
2108 {
2109 /* SMSC9505A USB Ethernet Device */
2110 USB_DEVICE(0x0424, 0x9E01),
2111 .driver_info = (unsigned long) &smsc95xx_info,
2112 },
2113 {
2114 /* SMSC9512/9514 USB Hub & Ethernet Device */
2115 USB_DEVICE(0x0424, 0xec00),
2116 .driver_info = (unsigned long) &smsc95xx_info,
2117 },
2118 {
2119 /* SMSC9500 USB Ethernet Device (SAL10) */
2120 USB_DEVICE(0x0424, 0x9900),
2121 .driver_info = (unsigned long) &smsc95xx_info,
2122 },
2123 {
2124 /* SMSC9505 USB Ethernet Device (SAL10) */
2125 USB_DEVICE(0x0424, 0x9901),
2126 .driver_info = (unsigned long) &smsc95xx_info,
2127 },
2128 {
2129 /* SMSC9500A USB Ethernet Device (SAL10) */
2130 USB_DEVICE(0x0424, 0x9902),
2131 .driver_info = (unsigned long) &smsc95xx_info,
2132 },
2133 {
2134 /* SMSC9505A USB Ethernet Device (SAL10) */
2135 USB_DEVICE(0x0424, 0x9903),
2136 .driver_info = (unsigned long) &smsc95xx_info,
2137 },
2138 {
2139 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2140 USB_DEVICE(0x0424, 0x9904),
2141 .driver_info = (unsigned long) &smsc95xx_info,
2142 },
2143 {
2144 /* SMSC9500A USB Ethernet Device (HAL) */
2145 USB_DEVICE(0x0424, 0x9905),
2146 .driver_info = (unsigned long) &smsc95xx_info,
2147 },
2148 {
2149 /* SMSC9505A USB Ethernet Device (HAL) */
2150 USB_DEVICE(0x0424, 0x9906),
2151 .driver_info = (unsigned long) &smsc95xx_info,
2152 },
2153 {
2154 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2155 USB_DEVICE(0x0424, 0x9907),
2156 .driver_info = (unsigned long) &smsc95xx_info,
2157 },
2158 {
2159 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2160 USB_DEVICE(0x0424, 0x9908),
2161 .driver_info = (unsigned long) &smsc95xx_info,
2162 },
2163 {
2164 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2165 USB_DEVICE(0x0424, 0x9909),
2166 .driver_info = (unsigned long) &smsc95xx_info,
2167 },
2168 {
2169 /* SMSC LAN9530 USB Ethernet Device */
2170 USB_DEVICE(0x0424, 0x9530),
2171 .driver_info = (unsigned long) &smsc95xx_info,
2172 },
2173 {
2174 /* SMSC LAN9730 USB Ethernet Device */
2175 USB_DEVICE(0x0424, 0x9730),
2176 .driver_info = (unsigned long) &smsc95xx_info,
2177 },
2178 {
2179 /* SMSC LAN89530 USB Ethernet Device */
2180 USB_DEVICE(0x0424, 0x9E08),
2181 .driver_info = (unsigned long) &smsc95xx_info,
2182 },
2183 { }, /* END */
2184 };
2185 MODULE_DEVICE_TABLE(usb, products);
2186
2187 static struct usb_driver smsc95xx_driver = {
2188 .name = "smsc95xx",
2189 .id_table = products,
2190 .probe = usbnet_probe,
2191 .suspend = smsc95xx_suspend,
2192 .resume = smsc95xx_resume,
2193 .reset_resume = smsc95xx_reset_resume,
2194 .disconnect = usbnet_disconnect,
2195 .disable_hub_initiated_lpm = 1,
2196 .supports_autosuspend = 1,
2197 };
2198
2199 module_usb_driver(smsc95xx_driver);
2200
2201 MODULE_AUTHOR("Nancy Lin");
2202 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2203 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2204 MODULE_LICENSE("GPL");
Linux with added FPC-III support