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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / usb / smsc95xx.c
blob309b88acd3d0b6ca1528dde7b27a23926f9be952
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 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
778
779 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
780 if (ret < 0)
781 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
782
783 return ret;
784 }
785
786 static int get_mdix_status(struct net_device *net)
787 {
788 struct usbnet *dev = netdev_priv(net);
789 u32 val;
790 int buf;
791
792 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
793 if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
794 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
795 return ETH_TP_MDI_AUTO;
796 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
797 return ETH_TP_MDI_X;
798 } else {
799 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
800 if (val & STRAP_STATUS_AMDIX_EN_)
801 return ETH_TP_MDI_AUTO;
802 }
803
804 return ETH_TP_MDI;
805 }
806
807 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
808 {
809 struct usbnet *dev = netdev_priv(net);
810 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
811 int buf;
812
813 if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
814 (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
815 (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
816 (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
817 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
818 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
819 PHY_EDPD_CONFIG);
820 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
821 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
822 PHY_EDPD_CONFIG, buf);
823 }
824
825 if (mdix_ctrl == ETH_TP_MDI) {
826 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
827 SPECIAL_CTRL_STS);
828 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
829 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
830 SPECIAL_CTRL_STS_AMDIX_STATE_);
831 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
832 SPECIAL_CTRL_STS, buf);
833 } else if (mdix_ctrl == ETH_TP_MDI_X) {
834 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
835 SPECIAL_CTRL_STS);
836 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
837 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
838 SPECIAL_CTRL_STS_AMDIX_STATE_);
839 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
840 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
841 SPECIAL_CTRL_STS, buf);
842 } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
843 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
844 SPECIAL_CTRL_STS);
845 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
846 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
847 SPECIAL_CTRL_STS_AMDIX_STATE_);
848 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
849 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
850 SPECIAL_CTRL_STS, buf);
851 }
852 pdata->mdix_ctrl = mdix_ctrl;
853 }
854
855 static int smsc95xx_get_link_ksettings(struct net_device *net,
856 struct ethtool_link_ksettings *cmd)
857 {
858 struct usbnet *dev = netdev_priv(net);
859 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
860 int retval;
861
862 retval = usbnet_get_link_ksettings(net, cmd);
863
864 cmd->base.eth_tp_mdix = pdata->mdix_ctrl;
865 cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl;
866
867 return retval;
868 }
869
870 static int smsc95xx_set_link_ksettings(struct net_device *net,
871 const struct ethtool_link_ksettings *cmd)
872 {
873 struct usbnet *dev = netdev_priv(net);
874 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
875 int retval;
876
877 if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl)
878 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl);
879
880 retval = usbnet_set_link_ksettings(net, cmd);
881
882 return retval;
883 }
884
885 static const struct ethtool_ops smsc95xx_ethtool_ops = {
886 .get_link = usbnet_get_link,
887 .nway_reset = usbnet_nway_reset,
888 .get_drvinfo = usbnet_get_drvinfo,
889 .get_msglevel = usbnet_get_msglevel,
890 .set_msglevel = usbnet_set_msglevel,
891 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
892 .get_eeprom = smsc95xx_ethtool_get_eeprom,
893 .set_eeprom = smsc95xx_ethtool_set_eeprom,
894 .get_regs_len = smsc95xx_ethtool_getregslen,
895 .get_regs = smsc95xx_ethtool_getregs,
896 .get_wol = smsc95xx_ethtool_get_wol,
897 .set_wol = smsc95xx_ethtool_set_wol,
898 .get_link_ksettings = smsc95xx_get_link_ksettings,
899 .set_link_ksettings = smsc95xx_set_link_ksettings,
900 .get_ts_info = ethtool_op_get_ts_info,
901 };
902
903 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
904 {
905 struct usbnet *dev = netdev_priv(netdev);
906
907 if (!netif_running(netdev))
908 return -EINVAL;
909
910 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
911 }
912
913 static void smsc95xx_init_mac_address(struct usbnet *dev)
914 {
915 const u8 *mac_addr;
916
917 /* maybe the boot loader passed the MAC address in devicetree */
918 mac_addr = of_get_mac_address(dev->udev->dev.of_node);
919 if (mac_addr) {
920 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
921 return;
922 }
923
924 /* try reading mac address from EEPROM */
925 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
926 dev->net->dev_addr) == 0) {
927 if (is_valid_ether_addr(dev->net->dev_addr)) {
928 /* eeprom values are valid so use them */
929 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
930 return;
931 }
932 }
933
934 /* no useful static MAC address found. generate a random one */
935 eth_hw_addr_random(dev->net);
936 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
937 }
938
939 static int smsc95xx_set_mac_address(struct usbnet *dev)
940 {
941 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
942 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
943 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
944 int ret;
945
946 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
947 if (ret < 0)
948 return ret;
949
950 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
951 }
952
953 /* starts the TX path */
954 static int smsc95xx_start_tx_path(struct usbnet *dev)
955 {
956 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
957 unsigned long flags;
958 int ret;
959
960 /* Enable Tx at MAC */
961 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
962 pdata->mac_cr |= MAC_CR_TXEN_;
963 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
964
965 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
966 if (ret < 0)
967 return ret;
968
969 /* Enable Tx at SCSRs */
970 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
971 }
972
973 /* Starts the Receive path */
974 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
975 {
976 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
977 unsigned long flags;
978
979 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
980 pdata->mac_cr |= MAC_CR_RXEN_;
981 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
982
983 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
984 }
985
986 static int smsc95xx_phy_initialize(struct usbnet *dev)
987 {
988 int bmcr, ret, timeout = 0;
989
990 /* Initialize MII structure */
991 dev->mii.dev = dev->net;
992 dev->mii.mdio_read = smsc95xx_mdio_read;
993 dev->mii.mdio_write = smsc95xx_mdio_write;
994 dev->mii.phy_id_mask = 0x1f;
995 dev->mii.reg_num_mask = 0x1f;
996 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
997
998 /* reset phy and wait for reset to complete */
999 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1000
1001 do {
1002 msleep(10);
1003 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
1004 timeout++;
1005 } while ((bmcr & BMCR_RESET) && (timeout < 100));
1006
1007 if (timeout >= 100) {
1008 netdev_warn(dev->net, "timeout on PHY Reset");
1009 return -EIO;
1010 }
1011
1012 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1013 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1014 ADVERTISE_PAUSE_ASYM);
1015
1016 /* read to clear */
1017 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1018 if (ret < 0) {
1019 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1020 return ret;
1021 }
1022
1023 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1024 PHY_INT_MASK_DEFAULT_);
1025 mii_nway_restart(&dev->mii);
1026
1027 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1028 return 0;
1029 }
1030
1031 static int smsc95xx_reset(struct usbnet *dev)
1032 {
1033 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1034 u32 read_buf, write_buf, burst_cap;
1035 int ret = 0, timeout;
1036
1037 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1038
1039 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1040 if (ret < 0)
1041 return ret;
1042
1043 timeout = 0;
1044 do {
1045 msleep(10);
1046 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1047 if (ret < 0)
1048 return ret;
1049 timeout++;
1050 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1051
1052 if (timeout >= 100) {
1053 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1054 return ret;
1055 }
1056
1057 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1058 if (ret < 0)
1059 return ret;
1060
1061 timeout = 0;
1062 do {
1063 msleep(10);
1064 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1065 if (ret < 0)
1066 return ret;
1067 timeout++;
1068 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1069
1070 if (timeout >= 100) {
1071 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1072 return ret;
1073 }
1074
1075 ret = smsc95xx_set_mac_address(dev);
1076 if (ret < 0)
1077 return ret;
1078
1079 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1080 dev->net->dev_addr);
1081
1082 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1083 if (ret < 0)
1084 return ret;
1085
1086 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1087 read_buf);
1088
1089 read_buf |= HW_CFG_BIR_;
1090
1091 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1092 if (ret < 0)
1093 return ret;
1094
1095 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1096 if (ret < 0)
1097 return ret;
1098
1099 netif_dbg(dev, ifup, dev->net,
1100 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1101 read_buf);
1102
1103 if (!turbo_mode) {
1104 burst_cap = 0;
1105 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1106 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1107 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1108 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1109 } else {
1110 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1111 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1112 }
1113
1114 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1115 (ulong)dev->rx_urb_size);
1116
1117 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1118 if (ret < 0)
1119 return ret;
1120
1121 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1122 if (ret < 0)
1123 return ret;
1124
1125 netif_dbg(dev, ifup, dev->net,
1126 "Read Value from BURST_CAP after writing: 0x%08x\n",
1127 read_buf);
1128
1129 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1130 if (ret < 0)
1131 return ret;
1132
1133 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1134 if (ret < 0)
1135 return ret;
1136
1137 netif_dbg(dev, ifup, dev->net,
1138 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1139 read_buf);
1140
1141 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1142 if (ret < 0)
1143 return ret;
1144
1145 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1146 read_buf);
1147
1148 if (turbo_mode)
1149 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1150
1151 read_buf &= ~HW_CFG_RXDOFF_;
1152
1153 /* set Rx data offset=2, Make IP header aligns on word boundary. */
1154 read_buf |= NET_IP_ALIGN << 9;
1155
1156 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1157 if (ret < 0)
1158 return ret;
1159
1160 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1161 if (ret < 0)
1162 return ret;
1163
1164 netif_dbg(dev, ifup, dev->net,
1165 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1166
1167 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1168 if (ret < 0)
1169 return ret;
1170
1171 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1172 if (ret < 0)
1173 return ret;
1174 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1175
1176 /* Configure GPIO pins as LED outputs */
1177 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1178 LED_GPIO_CFG_FDX_LED;
1179 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1180 if (ret < 0)
1181 return ret;
1182
1183 /* Init Tx */
1184 ret = smsc95xx_write_reg(dev, FLOW, 0);
1185 if (ret < 0)
1186 return ret;
1187
1188 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1189 if (ret < 0)
1190 return ret;
1191
1192 /* Don't need mac_cr_lock during initialisation */
1193 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1194 if (ret < 0)
1195 return ret;
1196
1197 /* Init Rx */
1198 /* Set Vlan */
1199 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1200 if (ret < 0)
1201 return ret;
1202
1203 /* Enable or disable checksum offload engines */
1204 ret = smsc95xx_set_features(dev->net, dev->net->features);
1205 if (ret < 0) {
1206 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1207 return ret;
1208 }
1209
1210 smsc95xx_set_multicast(dev->net);
1211
1212 ret = smsc95xx_phy_initialize(dev);
1213 if (ret < 0) {
1214 netdev_warn(dev->net, "Failed to init PHY\n");
1215 return ret;
1216 }
1217
1218 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1219 if (ret < 0)
1220 return ret;
1221
1222 /* enable PHY interrupts */
1223 read_buf |= INT_EP_CTL_PHY_INT_;
1224
1225 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1226 if (ret < 0)
1227 return ret;
1228
1229 ret = smsc95xx_start_tx_path(dev);
1230 if (ret < 0) {
1231 netdev_warn(dev->net, "Failed to start TX path\n");
1232 return ret;
1233 }
1234
1235 ret = smsc95xx_start_rx_path(dev, 0);
1236 if (ret < 0) {
1237 netdev_warn(dev->net, "Failed to start RX path\n");
1238 return ret;
1239 }
1240
1241 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1242 return 0;
1243 }
1244
1245 static const struct net_device_ops smsc95xx_netdev_ops = {
1246 .ndo_open = usbnet_open,
1247 .ndo_stop = usbnet_stop,
1248 .ndo_start_xmit = usbnet_start_xmit,
1249 .ndo_tx_timeout = usbnet_tx_timeout,
1250 .ndo_change_mtu = usbnet_change_mtu,
1251 .ndo_get_stats64 = usbnet_get_stats64,
1252 .ndo_set_mac_address = eth_mac_addr,
1253 .ndo_validate_addr = eth_validate_addr,
1254 .ndo_do_ioctl = smsc95xx_ioctl,
1255 .ndo_set_rx_mode = smsc95xx_set_multicast,
1256 .ndo_set_features = smsc95xx_set_features,
1257 };
1258
1259 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1260 {
1261 struct smsc95xx_priv *pdata = NULL;
1262 u32 val;
1263 int ret;
1264
1265 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1266
1267 ret = usbnet_get_endpoints(dev, intf);
1268 if (ret < 0) {
1269 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1270 return ret;
1271 }
1272
1273 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1274 GFP_KERNEL);
1275
1276 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1277 if (!pdata)
1278 return -ENOMEM;
1279
1280 spin_lock_init(&pdata->mac_cr_lock);
1281
1282 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1283 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1284 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1285 * it is transmitted as all ones. The zero transmitted checksum means
1286 * transmitter generated no checksum. Hence, enable csum offload only
1287 * for ipv4 packets.
1288 */
1289 if (DEFAULT_TX_CSUM_ENABLE)
1290 dev->net->features |= NETIF_F_IP_CSUM;
1291 if (DEFAULT_RX_CSUM_ENABLE)
1292 dev->net->features |= NETIF_F_RXCSUM;
1293
1294 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1295
1296 smsc95xx_init_mac_address(dev);
1297
1298 /* Init all registers */
1299 ret = smsc95xx_reset(dev);
1300
1301 /* detect device revision as different features may be available */
1302 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1303 if (ret < 0)
1304 return ret;
1305 val >>= 16;
1306 pdata->chip_id = val;
1307 pdata->mdix_ctrl = get_mdix_status(dev->net);
1308
1309 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1310 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1311 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1312 FEATURE_PHY_NLP_CROSSOVER |
1313 FEATURE_REMOTE_WAKEUP);
1314 else if (val == ID_REV_CHIP_ID_9512_)
1315 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1316
1317 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1318 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1319 dev->net->flags |= IFF_MULTICAST;
1320 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1321 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1322
1323 pdata->dev = dev;
1324 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1325 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1326
1327 return 0;
1328 }
1329
1330 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1331 {
1332 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1333
1334 if (pdata) {
1335 cancel_delayed_work(&pdata->carrier_check);
1336 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1337 kfree(pdata);
1338 pdata = NULL;
1339 dev->data[0] = 0;
1340 }
1341 }
1342
1343 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1344 {
1345 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1346 return crc << ((filter % 2) * 16);
1347 }
1348
1349 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1350 {
1351 struct mii_if_info *mii = &dev->mii;
1352 int ret;
1353
1354 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1355
1356 /* read to clear */
1357 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1358 if (ret < 0)
1359 return ret;
1360
1361 /* enable interrupt source */
1362 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1363 if (ret < 0)
1364 return ret;
1365
1366 ret |= mask;
1367
1368 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1369
1370 return 0;
1371 }
1372
1373 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1374 {
1375 struct mii_if_info *mii = &dev->mii;
1376 int ret;
1377
1378 /* first, a dummy read, needed to latch some MII phys */
1379 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1380 if (ret < 0)
1381 return ret;
1382
1383 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1384 if (ret < 0)
1385 return ret;
1386
1387 return !!(ret & BMSR_LSTATUS);
1388 }
1389
1390 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1391 {
1392 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1393 u32 val;
1394 int ret;
1395
1396 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1397 if (ret < 0)
1398 return ret;
1399
1400 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1401 val |= PM_CTL_SUS_MODE_0;
1402
1403 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1404 if (ret < 0)
1405 return ret;
1406
1407 /* clear wol status */
1408 val &= ~PM_CTL_WUPS_;
1409 val |= PM_CTL_WUPS_WOL_;
1410
1411 /* enable energy detection */
1412 if (pdata->wolopts & WAKE_PHY)
1413 val |= PM_CTL_WUPS_ED_;
1414
1415 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1416 if (ret < 0)
1417 return ret;
1418
1419 /* read back PM_CTRL */
1420 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1421 if (ret < 0)
1422 return ret;
1423
1424 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1425
1426 return 0;
1427 }
1428
1429 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1430 {
1431 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1432 struct mii_if_info *mii = &dev->mii;
1433 u32 val;
1434 int ret;
1435
1436 /* reconfigure link pulse detection timing for
1437 * compatibility with non-standard link partners
1438 */
1439 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1440 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1441 PHY_EDPD_CONFIG_DEFAULT);
1442
1443 /* enable energy detect power-down mode */
1444 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1445 if (ret < 0)
1446 return ret;
1447
1448 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1449
1450 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1451
1452 /* enter SUSPEND1 mode */
1453 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1454 if (ret < 0)
1455 return ret;
1456
1457 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1458 val |= PM_CTL_SUS_MODE_1;
1459
1460 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1461 if (ret < 0)
1462 return ret;
1463
1464 /* clear wol status, enable energy detection */
1465 val &= ~PM_CTL_WUPS_;
1466 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1467
1468 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1469 if (ret < 0)
1470 return ret;
1471
1472 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1473
1474 return 0;
1475 }
1476
1477 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1478 {
1479 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1480 u32 val;
1481 int ret;
1482
1483 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1484 if (ret < 0)
1485 return ret;
1486
1487 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1488 val |= PM_CTL_SUS_MODE_2;
1489
1490 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1491 if (ret < 0)
1492 return ret;
1493
1494 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1495
1496 return 0;
1497 }
1498
1499 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1500 {
1501 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1502 u32 val;
1503 int ret;
1504
1505 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1506 if (ret < 0)
1507 return ret;
1508
1509 if (val & RX_FIFO_INF_USED_) {
1510 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1511 return -EBUSY;
1512 }
1513
1514 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1515 if (ret < 0)
1516 return ret;
1517
1518 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1519 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1520
1521 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1522 if (ret < 0)
1523 return ret;
1524
1525 /* clear wol status */
1526 val &= ~PM_CTL_WUPS_;
1527 val |= PM_CTL_WUPS_WOL_;
1528
1529 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1530 if (ret < 0)
1531 return ret;
1532
1533 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1534
1535 return 0;
1536 }
1537
1538 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1539 {
1540 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1541 int ret;
1542
1543 if (!netif_running(dev->net)) {
1544 /* interface is ifconfig down so fully power down hw */
1545 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1546 return smsc95xx_enter_suspend2(dev);
1547 }
1548
1549 if (!link_up) {
1550 /* link is down so enter EDPD mode, but only if device can
1551 * reliably resume from it. This check should be redundant
1552 * as current FEATURE_REMOTE_WAKEUP parts also support
1553 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1554 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1555 netdev_warn(dev->net, "EDPD not supported\n");
1556 return -EBUSY;
1557 }
1558
1559 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1560
1561 /* enable PHY wakeup events for if cable is attached */
1562 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1563 PHY_INT_MASK_ANEG_COMP_);
1564 if (ret < 0) {
1565 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1566 return ret;
1567 }
1568
1569 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1570 return smsc95xx_enter_suspend1(dev);
1571 }
1572
1573 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1574 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1575 PHY_INT_MASK_LINK_DOWN_);
1576 if (ret < 0) {
1577 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1578 return ret;
1579 }
1580
1581 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1582 return smsc95xx_enter_suspend3(dev);
1583 }
1584
1585 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1586 {
1587 struct usbnet *dev = usb_get_intfdata(intf);
1588 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1589 u32 val, link_up;
1590 int ret;
1591
1592 ret = usbnet_suspend(intf, message);
1593 if (ret < 0) {
1594 netdev_warn(dev->net, "usbnet_suspend error\n");
1595 return ret;
1596 }
1597
1598 if (pdata->suspend_flags) {
1599 netdev_warn(dev->net, "error during last resume\n");
1600 pdata->suspend_flags = 0;
1601 }
1602
1603 /* determine if link is up using only _nopm functions */
1604 link_up = smsc95xx_link_ok_nopm(dev);
1605
1606 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1607 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1608 ret = smsc95xx_autosuspend(dev, link_up);
1609 goto done;
1610 }
1611
1612 /* if we get this far we're not autosuspending */
1613 /* if no wol options set, or if link is down and we're not waking on
1614 * PHY activity, enter lowest power SUSPEND2 mode
1615 */
1616 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1617 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1618 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1619
1620 /* disable energy detect (link up) & wake up events */
1621 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1622 if (ret < 0)
1623 goto done;
1624
1625 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1626
1627 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1628 if (ret < 0)
1629 goto done;
1630
1631 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1632 if (ret < 0)
1633 goto done;
1634
1635 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1636
1637 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1638 if (ret < 0)
1639 goto done;
1640
1641 ret = smsc95xx_enter_suspend2(dev);
1642 goto done;
1643 }
1644
1645 if (pdata->wolopts & WAKE_PHY) {
1646 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1647 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1648 if (ret < 0) {
1649 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1650 goto done;
1651 }
1652
1653 /* if link is down then configure EDPD and enter SUSPEND1,
1654 * otherwise enter SUSPEND0 below
1655 */
1656 if (!link_up) {
1657 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1658 ret = smsc95xx_enter_suspend1(dev);
1659 goto done;
1660 }
1661 }
1662
1663 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1664 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1665 u32 command[2];
1666 u32 offset[2];
1667 u32 crc[4];
1668 int wuff_filter_count =
1669 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1670 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1671 int i, filter = 0;
1672
1673 if (!filter_mask) {
1674 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1675 ret = -ENOMEM;
1676 goto done;
1677 }
1678
1679 memset(command, 0, sizeof(command));
1680 memset(offset, 0, sizeof(offset));
1681 memset(crc, 0, sizeof(crc));
1682
1683 if (pdata->wolopts & WAKE_BCAST) {
1684 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1685 netdev_info(dev->net, "enabling broadcast detection\n");
1686 filter_mask[filter * 4] = 0x003F;
1687 filter_mask[filter * 4 + 1] = 0x00;
1688 filter_mask[filter * 4 + 2] = 0x00;
1689 filter_mask[filter * 4 + 3] = 0x00;
1690 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1691 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1692 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1693 filter++;
1694 }
1695
1696 if (pdata->wolopts & WAKE_MCAST) {
1697 const u8 mcast[] = {0x01, 0x00, 0x5E};
1698 netdev_info(dev->net, "enabling multicast detection\n");
1699 filter_mask[filter * 4] = 0x0007;
1700 filter_mask[filter * 4 + 1] = 0x00;
1701 filter_mask[filter * 4 + 2] = 0x00;
1702 filter_mask[filter * 4 + 3] = 0x00;
1703 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1704 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1705 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1706 filter++;
1707 }
1708
1709 if (pdata->wolopts & WAKE_ARP) {
1710 const u8 arp[] = {0x08, 0x06};
1711 netdev_info(dev->net, "enabling ARP detection\n");
1712 filter_mask[filter * 4] = 0x0003;
1713 filter_mask[filter * 4 + 1] = 0x00;
1714 filter_mask[filter * 4 + 2] = 0x00;
1715 filter_mask[filter * 4 + 3] = 0x00;
1716 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1717 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1718 crc[filter/2] |= smsc_crc(arp, 2, filter);
1719 filter++;
1720 }
1721
1722 if (pdata->wolopts & WAKE_UCAST) {
1723 netdev_info(dev->net, "enabling unicast detection\n");
1724 filter_mask[filter * 4] = 0x003F;
1725 filter_mask[filter * 4 + 1] = 0x00;
1726 filter_mask[filter * 4 + 2] = 0x00;
1727 filter_mask[filter * 4 + 3] = 0x00;
1728 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1729 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1730 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1731 filter++;
1732 }
1733
1734 for (i = 0; i < (wuff_filter_count * 4); i++) {
1735 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1736 if (ret < 0) {
1737 kfree(filter_mask);
1738 goto done;
1739 }
1740 }
1741 kfree(filter_mask);
1742
1743 for (i = 0; i < (wuff_filter_count / 4); i++) {
1744 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1745 if (ret < 0)
1746 goto done;
1747 }
1748
1749 for (i = 0; i < (wuff_filter_count / 4); i++) {
1750 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1751 if (ret < 0)
1752 goto done;
1753 }
1754
1755 for (i = 0; i < (wuff_filter_count / 2); i++) {
1756 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1757 if (ret < 0)
1758 goto done;
1759 }
1760
1761 /* clear any pending pattern match packet status */
1762 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1763 if (ret < 0)
1764 goto done;
1765
1766 val |= WUCSR_WUFR_;
1767
1768 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1769 if (ret < 0)
1770 goto done;
1771 }
1772
1773 if (pdata->wolopts & WAKE_MAGIC) {
1774 /* clear any pending magic packet status */
1775 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1776 if (ret < 0)
1777 goto done;
1778
1779 val |= WUCSR_MPR_;
1780
1781 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1782 if (ret < 0)
1783 goto done;
1784 }
1785
1786 /* enable/disable wakeup sources */
1787 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1788 if (ret < 0)
1789 goto done;
1790
1791 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1792 netdev_info(dev->net, "enabling pattern match wakeup\n");
1793 val |= WUCSR_WAKE_EN_;
1794 } else {
1795 netdev_info(dev->net, "disabling pattern match wakeup\n");
1796 val &= ~WUCSR_WAKE_EN_;
1797 }
1798
1799 if (pdata->wolopts & WAKE_MAGIC) {
1800 netdev_info(dev->net, "enabling magic packet wakeup\n");
1801 val |= WUCSR_MPEN_;
1802 } else {
1803 netdev_info(dev->net, "disabling magic packet wakeup\n");
1804 val &= ~WUCSR_MPEN_;
1805 }
1806
1807 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1808 if (ret < 0)
1809 goto done;
1810
1811 /* enable wol wakeup source */
1812 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1813 if (ret < 0)
1814 goto done;
1815
1816 val |= PM_CTL_WOL_EN_;
1817
1818 /* phy energy detect wakeup source */
1819 if (pdata->wolopts & WAKE_PHY)
1820 val |= PM_CTL_ED_EN_;
1821
1822 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1823 if (ret < 0)
1824 goto done;
1825
1826 /* enable receiver to enable frame reception */
1827 smsc95xx_start_rx_path(dev, 1);
1828
1829 /* some wol options are enabled, so enter SUSPEND0 */
1830 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1831 ret = smsc95xx_enter_suspend0(dev);
1832
1833 done:
1834 /*
1835 * TODO: resume() might need to handle the suspend failure
1836 * in system sleep
1837 */
1838 if (ret && PMSG_IS_AUTO(message))
1839 usbnet_resume(intf);
1840 return ret;
1841 }
1842
1843 static int smsc95xx_resume(struct usb_interface *intf)
1844 {
1845 struct usbnet *dev = usb_get_intfdata(intf);
1846 struct smsc95xx_priv *pdata;
1847 u8 suspend_flags;
1848 int ret;
1849 u32 val;
1850
1851 BUG_ON(!dev);
1852 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1853 suspend_flags = pdata->suspend_flags;
1854
1855 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1856
1857 /* do this first to ensure it's cleared even in error case */
1858 pdata->suspend_flags = 0;
1859 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1860
1861 if (suspend_flags & SUSPEND_ALLMODES) {
1862 /* clear wake-up sources */
1863 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1864 if (ret < 0)
1865 return ret;
1866
1867 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1868
1869 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1870 if (ret < 0)
1871 return ret;
1872
1873 /* clear wake-up status */
1874 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1875 if (ret < 0)
1876 return ret;
1877
1878 val &= ~PM_CTL_WOL_EN_;
1879 val |= PM_CTL_WUPS_;
1880
1881 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1882 if (ret < 0)
1883 return ret;
1884 }
1885
1886 ret = usbnet_resume(intf);
1887 if (ret < 0)
1888 netdev_warn(dev->net, "usbnet_resume error\n");
1889
1890 return ret;
1891 }
1892
1893 static int smsc95xx_reset_resume(struct usb_interface *intf)
1894 {
1895 struct usbnet *dev = usb_get_intfdata(intf);
1896 int ret;
1897
1898 ret = smsc95xx_reset(dev);
1899 if (ret < 0)
1900 return ret;
1901
1902 return smsc95xx_resume(intf);
1903 }
1904
1905 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1906 {
1907 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1908 skb->ip_summed = CHECKSUM_COMPLETE;
1909 skb_trim(skb, skb->len - 2);
1910 }
1911
1912 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1913 {
1914 /* This check is no longer done by usbnet */
1915 if (skb->len < dev->net->hard_header_len)
1916 return 0;
1917
1918 while (skb->len > 0) {
1919 u32 header, align_count;
1920 struct sk_buff *ax_skb;
1921 unsigned char *packet;
1922 u16 size;
1923
1924 memcpy(&header, skb->data, sizeof(header));
1925 le32_to_cpus(&header);
1926 skb_pull(skb, 4 + NET_IP_ALIGN);
1927 packet = skb->data;
1928
1929 /* get the packet length */
1930 size = (u16)((header & RX_STS_FL_) >> 16);
1931 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1932
1933 if (unlikely(header & RX_STS_ES_)) {
1934 netif_dbg(dev, rx_err, dev->net,
1935 "Error header=0x%08x\n", header);
1936 dev->net->stats.rx_errors++;
1937 dev->net->stats.rx_dropped++;
1938
1939 if (header & RX_STS_CRC_) {
1940 dev->net->stats.rx_crc_errors++;
1941 } else {
1942 if (header & (RX_STS_TL_ | RX_STS_RF_))
1943 dev->net->stats.rx_frame_errors++;
1944
1945 if ((header & RX_STS_LE_) &&
1946 (!(header & RX_STS_FT_)))
1947 dev->net->stats.rx_length_errors++;
1948 }
1949 } else {
1950 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1951 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1952 netif_dbg(dev, rx_err, dev->net,
1953 "size err header=0x%08x\n", header);
1954 return 0;
1955 }
1956
1957 /* last frame in this batch */
1958 if (skb->len == size) {
1959 if (dev->net->features & NETIF_F_RXCSUM)
1960 smsc95xx_rx_csum_offload(skb);
1961 skb_trim(skb, skb->len - 4); /* remove fcs */
1962 skb->truesize = size + sizeof(struct sk_buff);
1963
1964 return 1;
1965 }
1966
1967 ax_skb = skb_clone(skb, GFP_ATOMIC);
1968 if (unlikely(!ax_skb)) {
1969 netdev_warn(dev->net, "Error allocating skb\n");
1970 return 0;
1971 }
1972
1973 ax_skb->len = size;
1974 ax_skb->data = packet;
1975 skb_set_tail_pointer(ax_skb, size);
1976
1977 if (dev->net->features & NETIF_F_RXCSUM)
1978 smsc95xx_rx_csum_offload(ax_skb);
1979 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1980 ax_skb->truesize = size + sizeof(struct sk_buff);
1981
1982 usbnet_skb_return(dev, ax_skb);
1983 }
1984
1985 skb_pull(skb, size);
1986
1987 /* padding bytes before the next frame starts */
1988 if (skb->len)
1989 skb_pull(skb, align_count);
1990 }
1991
1992 return 1;
1993 }
1994
1995 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1996 {
1997 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1998 u16 high_16 = low_16 + skb->csum_offset;
1999 return (high_16 << 16) | low_16;
2000 }
2001
2002 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
2003 struct sk_buff *skb, gfp_t flags)
2004 {
2005 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2006 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2007 u32 tx_cmd_a, tx_cmd_b;
2008
2009 /* We do not advertise SG, so skbs should be already linearized */
2010 BUG_ON(skb_shinfo(skb)->nr_frags);
2011
2012 /* Make writable and expand header space by overhead if required */
2013 if (skb_cow_head(skb, overhead)) {
2014 /* Must deallocate here as returning NULL to indicate error
2015 * means the skb won't be deallocated in the caller.
2016 */
2017 dev_kfree_skb_any(skb);
2018 return NULL;
2019 }
2020
2021 if (csum) {
2022 if (skb->len <= 45) {
2023 /* workaround - hardware tx checksum does not work
2024 * properly with extremely small packets */
2025 long csstart = skb_checksum_start_offset(skb);
2026 __wsum calc = csum_partial(skb->data + csstart,
2027 skb->len - csstart, 0);
2028 *((__sum16 *)(skb->data + csstart
2029 + skb->csum_offset)) = csum_fold(calc);
2030
2031 csum = false;
2032 } else {
2033 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2034 skb_push(skb, 4);
2035 cpu_to_le32s(&csum_preamble);
2036 memcpy(skb->data, &csum_preamble, 4);
2037 }
2038 }
2039
2040 skb_push(skb, 4);
2041 tx_cmd_b = (u32)(skb->len - 4);
2042 if (csum)
2043 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2044 cpu_to_le32s(&tx_cmd_b);
2045 memcpy(skb->data, &tx_cmd_b, 4);
2046
2047 skb_push(skb, 4);
2048 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2049 TX_CMD_A_LAST_SEG_;
2050 cpu_to_le32s(&tx_cmd_a);
2051 memcpy(skb->data, &tx_cmd_a, 4);
2052
2053 return skb;
2054 }
2055
2056 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2057 {
2058 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2059
2060 dev->intf->needs_remote_wakeup = on;
2061
2062 if (pdata->features & FEATURE_REMOTE_WAKEUP)
2063 return 0;
2064
2065 /* this chip revision isn't capable of remote wakeup */
2066 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2067
2068 if (on)
2069 usb_autopm_get_interface_no_resume(dev->intf);
2070 else
2071 usb_autopm_put_interface(dev->intf);
2072
2073 return 0;
2074 }
2075
2076 static const struct driver_info smsc95xx_info = {
2077 .description = "smsc95xx USB 2.0 Ethernet",
2078 .bind = smsc95xx_bind,
2079 .unbind = smsc95xx_unbind,
2080 .link_reset = smsc95xx_link_reset,
2081 .reset = smsc95xx_reset,
2082 .rx_fixup = smsc95xx_rx_fixup,
2083 .tx_fixup = smsc95xx_tx_fixup,
2084 .status = smsc95xx_status,
2085 .manage_power = smsc95xx_manage_power,
2086 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2087 };
2088
2089 static const struct usb_device_id products[] = {
2090 {
2091 /* SMSC9500 USB Ethernet Device */
2092 USB_DEVICE(0x0424, 0x9500),
2093 .driver_info = (unsigned long) &smsc95xx_info,
2094 },
2095 {
2096 /* SMSC9505 USB Ethernet Device */
2097 USB_DEVICE(0x0424, 0x9505),
2098 .driver_info = (unsigned long) &smsc95xx_info,
2099 },
2100 {
2101 /* SMSC9500A USB Ethernet Device */
2102 USB_DEVICE(0x0424, 0x9E00),
2103 .driver_info = (unsigned long) &smsc95xx_info,
2104 },
2105 {
2106 /* SMSC9505A USB Ethernet Device */
2107 USB_DEVICE(0x0424, 0x9E01),
2108 .driver_info = (unsigned long) &smsc95xx_info,
2109 },
2110 {
2111 /* SMSC9512/9514 USB Hub & Ethernet Device */
2112 USB_DEVICE(0x0424, 0xec00),
2113 .driver_info = (unsigned long) &smsc95xx_info,
2114 },
2115 {
2116 /* SMSC9500 USB Ethernet Device (SAL10) */
2117 USB_DEVICE(0x0424, 0x9900),
2118 .driver_info = (unsigned long) &smsc95xx_info,
2119 },
2120 {
2121 /* SMSC9505 USB Ethernet Device (SAL10) */
2122 USB_DEVICE(0x0424, 0x9901),
2123 .driver_info = (unsigned long) &smsc95xx_info,
2124 },
2125 {
2126 /* SMSC9500A USB Ethernet Device (SAL10) */
2127 USB_DEVICE(0x0424, 0x9902),
2128 .driver_info = (unsigned long) &smsc95xx_info,
2129 },
2130 {
2131 /* SMSC9505A USB Ethernet Device (SAL10) */
2132 USB_DEVICE(0x0424, 0x9903),
2133 .driver_info = (unsigned long) &smsc95xx_info,
2134 },
2135 {
2136 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2137 USB_DEVICE(0x0424, 0x9904),
2138 .driver_info = (unsigned long) &smsc95xx_info,
2139 },
2140 {
2141 /* SMSC9500A USB Ethernet Device (HAL) */
2142 USB_DEVICE(0x0424, 0x9905),
2143 .driver_info = (unsigned long) &smsc95xx_info,
2144 },
2145 {
2146 /* SMSC9505A USB Ethernet Device (HAL) */
2147 USB_DEVICE(0x0424, 0x9906),
2148 .driver_info = (unsigned long) &smsc95xx_info,
2149 },
2150 {
2151 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2152 USB_DEVICE(0x0424, 0x9907),
2153 .driver_info = (unsigned long) &smsc95xx_info,
2154 },
2155 {
2156 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2157 USB_DEVICE(0x0424, 0x9908),
2158 .driver_info = (unsigned long) &smsc95xx_info,
2159 },
2160 {
2161 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2162 USB_DEVICE(0x0424, 0x9909),
2163 .driver_info = (unsigned long) &smsc95xx_info,
2164 },
2165 {
2166 /* SMSC LAN9530 USB Ethernet Device */
2167 USB_DEVICE(0x0424, 0x9530),
2168 .driver_info = (unsigned long) &smsc95xx_info,
2169 },
2170 {
2171 /* SMSC LAN9730 USB Ethernet Device */
2172 USB_DEVICE(0x0424, 0x9730),
2173 .driver_info = (unsigned long) &smsc95xx_info,
2174 },
2175 {
2176 /* SMSC LAN89530 USB Ethernet Device */
2177 USB_DEVICE(0x0424, 0x9E08),
2178 .driver_info = (unsigned long) &smsc95xx_info,
2179 },
2180 { }, /* END */
2181 };
2182 MODULE_DEVICE_TABLE(usb, products);
2183
2184 static struct usb_driver smsc95xx_driver = {
2185 .name = "smsc95xx",
2186 .id_table = products,
2187 .probe = usbnet_probe,
2188 .suspend = smsc95xx_suspend,
2189 .resume = smsc95xx_resume,
2190 .reset_resume = smsc95xx_reset_resume,
2191 .disconnect = usbnet_disconnect,
2192 .disable_hub_initiated_lpm = 1,
2193 .supports_autosuspend = 1,
2194 };
2195
2196 module_usb_driver(smsc95xx_driver);
2197
2198 MODULE_AUTHOR("Nancy Lin");
2199 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2200 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2201 MODULE_LICENSE("GPL");
CRIS linux kernel tree