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hwrng: core - Don't use a stack buffer in add_early_randomness()
[linux/fpc-iii.git] / drivers / net / usb / smsc95xx.c
blob831aa33d078ae7d2dd57fdded5de71d1eb915f99
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 "1.0.5"
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, afc_cfg = 0;
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 else
541 flow = 0;
542
543 if (cap & FLOW_CTRL_TX)
544 afc_cfg |= 0xF;
545 else
546 afc_cfg &= ~0xF;
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 flow = 0;
554 afc_cfg |= 0xF;
555 }
556
557 ret = smsc95xx_write_reg(dev, FLOW, flow);
558 if (ret < 0)
559 return ret;
560
561 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
562 }
563
564 static int smsc95xx_link_reset(struct usbnet *dev)
565 {
566 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
567 struct mii_if_info *mii = &dev->mii;
568 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
569 unsigned long flags;
570 u16 lcladv, rmtadv;
571 int ret;
572
573 /* clear interrupt status */
574 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
575 if (ret < 0)
576 return ret;
577
578 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
579 if (ret < 0)
580 return ret;
581
582 mii_check_media(mii, 1, 1);
583 mii_ethtool_gset(&dev->mii, &ecmd);
584 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
585 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
586
587 netif_dbg(dev, link, dev->net,
588 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
589 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
590
591 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
592 if (ecmd.duplex != DUPLEX_FULL) {
593 pdata->mac_cr &= ~MAC_CR_FDPX_;
594 pdata->mac_cr |= MAC_CR_RCVOWN_;
595 } else {
596 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
597 pdata->mac_cr |= MAC_CR_FDPX_;
598 }
599 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
600
601 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
602 if (ret < 0)
603 return ret;
604
605 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
606 if (ret < 0)
607 netdev_warn(dev->net, "Error updating PHY flow control\n");
608
609 return ret;
610 }
611
612 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
613 {
614 u32 intdata;
615
616 if (urb->actual_length != 4) {
617 netdev_warn(dev->net, "unexpected urb length %d\n",
618 urb->actual_length);
619 return;
620 }
621
622 memcpy(&intdata, urb->transfer_buffer, 4);
623 le32_to_cpus(&intdata);
624
625 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
626
627 if (intdata & INT_ENP_PHY_INT_)
628 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
629 else
630 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
631 intdata);
632 }
633
634 static void set_carrier(struct usbnet *dev, bool link)
635 {
636 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
637
638 if (pdata->link_ok == link)
639 return;
640
641 pdata->link_ok = link;
642
643 if (link)
644 usbnet_link_change(dev, 1, 0);
645 else
646 usbnet_link_change(dev, 0, 0);
647 }
648
649 static void check_carrier(struct work_struct *work)
650 {
651 struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
652 carrier_check.work);
653 struct usbnet *dev = pdata->dev;
654 int ret;
655
656 if (pdata->suspend_flags != 0)
657 return;
658
659 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
660 if (ret < 0) {
661 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
662 return;
663 }
664 if (ret & BMSR_LSTATUS)
665 set_carrier(dev, 1);
666 else
667 set_carrier(dev, 0);
668
669 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
670 }
671
672 /* Enable or disable Tx & Rx checksum offload engines */
673 static int smsc95xx_set_features(struct net_device *netdev,
674 netdev_features_t features)
675 {
676 struct usbnet *dev = netdev_priv(netdev);
677 u32 read_buf;
678 int ret;
679
680 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
681 if (ret < 0)
682 return ret;
683
684 if (features & NETIF_F_HW_CSUM)
685 read_buf |= Tx_COE_EN_;
686 else
687 read_buf &= ~Tx_COE_EN_;
688
689 if (features & NETIF_F_RXCSUM)
690 read_buf |= Rx_COE_EN_;
691 else
692 read_buf &= ~Rx_COE_EN_;
693
694 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
695 if (ret < 0)
696 return ret;
697
698 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
699 return 0;
700 }
701
702 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
703 {
704 return MAX_EEPROM_SIZE;
705 }
706
707 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
708 struct ethtool_eeprom *ee, u8 *data)
709 {
710 struct usbnet *dev = netdev_priv(netdev);
711
712 ee->magic = LAN95XX_EEPROM_MAGIC;
713
714 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
715 }
716
717 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
718 struct ethtool_eeprom *ee, u8 *data)
719 {
720 struct usbnet *dev = netdev_priv(netdev);
721
722 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
723 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
724 ee->magic);
725 return -EINVAL;
726 }
727
728 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
729 }
730
731 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
732 {
733 /* all smsc95xx registers */
734 return COE_CR - ID_REV + sizeof(u32);
735 }
736
737 static void
738 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
739 void *buf)
740 {
741 struct usbnet *dev = netdev_priv(netdev);
742 unsigned int i, j;
743 int retval;
744 u32 *data = buf;
745
746 retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
747 if (retval < 0) {
748 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
749 return;
750 }
751
752 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
753 retval = smsc95xx_read_reg(dev, i, &data[j]);
754 if (retval < 0) {
755 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
756 return;
757 }
758 }
759 }
760
761 static void smsc95xx_ethtool_get_wol(struct net_device *net,
762 struct ethtool_wolinfo *wolinfo)
763 {
764 struct usbnet *dev = netdev_priv(net);
765 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
766
767 wolinfo->supported = SUPPORTED_WAKE;
768 wolinfo->wolopts = pdata->wolopts;
769 }
770
771 static int smsc95xx_ethtool_set_wol(struct net_device *net,
772 struct ethtool_wolinfo *wolinfo)
773 {
774 struct usbnet *dev = netdev_priv(net);
775 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
776 int ret;
777
778 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
779
780 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
781 if (ret < 0)
782 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
783
784 return ret;
785 }
786
787 static int get_mdix_status(struct net_device *net)
788 {
789 struct usbnet *dev = netdev_priv(net);
790 u32 val;
791 int buf;
792
793 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
794 if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
795 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
796 return ETH_TP_MDI_AUTO;
797 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
798 return ETH_TP_MDI_X;
799 } else {
800 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
801 if (val & STRAP_STATUS_AMDIX_EN_)
802 return ETH_TP_MDI_AUTO;
803 }
804
805 return ETH_TP_MDI;
806 }
807
808 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
809 {
810 struct usbnet *dev = netdev_priv(net);
811 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
812 int buf;
813
814 if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
815 (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
816 (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
817 (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
818 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
819 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
820 PHY_EDPD_CONFIG);
821 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
822 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
823 PHY_EDPD_CONFIG, buf);
824 }
825
826 if (mdix_ctrl == ETH_TP_MDI) {
827 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
828 SPECIAL_CTRL_STS);
829 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
830 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
831 SPECIAL_CTRL_STS_AMDIX_STATE_);
832 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
833 SPECIAL_CTRL_STS, buf);
834 } else if (mdix_ctrl == ETH_TP_MDI_X) {
835 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
836 SPECIAL_CTRL_STS);
837 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
838 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
839 SPECIAL_CTRL_STS_AMDIX_STATE_);
840 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
841 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
842 SPECIAL_CTRL_STS, buf);
843 } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
844 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
845 SPECIAL_CTRL_STS);
846 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
847 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
848 SPECIAL_CTRL_STS_AMDIX_STATE_);
849 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
850 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
851 SPECIAL_CTRL_STS, buf);
852 }
853 pdata->mdix_ctrl = mdix_ctrl;
854 }
855
856 static int smsc95xx_get_settings(struct net_device *net,
857 struct ethtool_cmd *cmd)
858 {
859 struct usbnet *dev = netdev_priv(net);
860 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
861 int retval;
862
863 retval = usbnet_get_settings(net, cmd);
864
865 cmd->eth_tp_mdix = pdata->mdix_ctrl;
866 cmd->eth_tp_mdix_ctrl = pdata->mdix_ctrl;
867
868 return retval;
869 }
870
871 static int smsc95xx_set_settings(struct net_device *net,
872 struct ethtool_cmd *cmd)
873 {
874 struct usbnet *dev = netdev_priv(net);
875 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
876 int retval;
877
878 if (pdata->mdix_ctrl != cmd->eth_tp_mdix_ctrl)
879 set_mdix_status(net, cmd->eth_tp_mdix_ctrl);
880
881 retval = usbnet_set_settings(net, cmd);
882
883 return retval;
884 }
885
886 static const struct ethtool_ops smsc95xx_ethtool_ops = {
887 .get_link = usbnet_get_link,
888 .nway_reset = usbnet_nway_reset,
889 .get_drvinfo = usbnet_get_drvinfo,
890 .get_msglevel = usbnet_get_msglevel,
891 .set_msglevel = usbnet_set_msglevel,
892 .get_settings = smsc95xx_get_settings,
893 .set_settings = smsc95xx_set_settings,
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 };
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_set_mac_address = eth_mac_addr,
1252 .ndo_validate_addr = eth_validate_addr,
1253 .ndo_do_ioctl = smsc95xx_ioctl,
1254 .ndo_set_rx_mode = smsc95xx_set_multicast,
1255 .ndo_set_features = smsc95xx_set_features,
1256 };
1257
1258 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1259 {
1260 struct smsc95xx_priv *pdata = NULL;
1261 u32 val;
1262 int ret;
1263
1264 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1265
1266 ret = usbnet_get_endpoints(dev, intf);
1267 if (ret < 0) {
1268 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1269 return ret;
1270 }
1271
1272 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1273 GFP_KERNEL);
1274
1275 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1276 if (!pdata)
1277 return -ENOMEM;
1278
1279 spin_lock_init(&pdata->mac_cr_lock);
1280
1281 if (DEFAULT_TX_CSUM_ENABLE)
1282 dev->net->features |= NETIF_F_HW_CSUM;
1283 if (DEFAULT_RX_CSUM_ENABLE)
1284 dev->net->features |= NETIF_F_RXCSUM;
1285
1286 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1287
1288 smsc95xx_init_mac_address(dev);
1289
1290 /* Init all registers */
1291 ret = smsc95xx_reset(dev);
1292
1293 /* detect device revision as different features may be available */
1294 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1295 if (ret < 0)
1296 return ret;
1297 val >>= 16;
1298 pdata->chip_id = val;
1299 pdata->mdix_ctrl = get_mdix_status(dev->net);
1300
1301 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1302 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1303 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1304 FEATURE_PHY_NLP_CROSSOVER |
1305 FEATURE_REMOTE_WAKEUP);
1306 else if (val == ID_REV_CHIP_ID_9512_)
1307 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1308
1309 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1310 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1311 dev->net->flags |= IFF_MULTICAST;
1312 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1313 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1314
1315 pdata->dev = dev;
1316 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1317 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1318
1319 return 0;
1320 }
1321
1322 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1323 {
1324 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1325
1326 if (pdata) {
1327 cancel_delayed_work(&pdata->carrier_check);
1328 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1329 kfree(pdata);
1330 pdata = NULL;
1331 dev->data[0] = 0;
1332 }
1333 }
1334
1335 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1336 {
1337 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1338 return crc << ((filter % 2) * 16);
1339 }
1340
1341 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1342 {
1343 struct mii_if_info *mii = &dev->mii;
1344 int ret;
1345
1346 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1347
1348 /* read to clear */
1349 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1350 if (ret < 0)
1351 return ret;
1352
1353 /* enable interrupt source */
1354 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1355 if (ret < 0)
1356 return ret;
1357
1358 ret |= mask;
1359
1360 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1361
1362 return 0;
1363 }
1364
1365 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1366 {
1367 struct mii_if_info *mii = &dev->mii;
1368 int ret;
1369
1370 /* first, a dummy read, needed to latch some MII phys */
1371 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1372 if (ret < 0)
1373 return ret;
1374
1375 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1376 if (ret < 0)
1377 return ret;
1378
1379 return !!(ret & BMSR_LSTATUS);
1380 }
1381
1382 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1383 {
1384 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1385 u32 val;
1386 int ret;
1387
1388 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1389 if (ret < 0)
1390 return ret;
1391
1392 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1393 val |= PM_CTL_SUS_MODE_0;
1394
1395 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1396 if (ret < 0)
1397 return ret;
1398
1399 /* clear wol status */
1400 val &= ~PM_CTL_WUPS_;
1401 val |= PM_CTL_WUPS_WOL_;
1402
1403 /* enable energy detection */
1404 if (pdata->wolopts & WAKE_PHY)
1405 val |= PM_CTL_WUPS_ED_;
1406
1407 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1408 if (ret < 0)
1409 return ret;
1410
1411 /* read back PM_CTRL */
1412 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1413 if (ret < 0)
1414 return ret;
1415
1416 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1417
1418 return 0;
1419 }
1420
1421 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1422 {
1423 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1424 struct mii_if_info *mii = &dev->mii;
1425 u32 val;
1426 int ret;
1427
1428 /* reconfigure link pulse detection timing for
1429 * compatibility with non-standard link partners
1430 */
1431 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1432 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1433 PHY_EDPD_CONFIG_DEFAULT);
1434
1435 /* enable energy detect power-down mode */
1436 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1437 if (ret < 0)
1438 return ret;
1439
1440 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1441
1442 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1443
1444 /* enter SUSPEND1 mode */
1445 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1446 if (ret < 0)
1447 return ret;
1448
1449 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1450 val |= PM_CTL_SUS_MODE_1;
1451
1452 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1453 if (ret < 0)
1454 return ret;
1455
1456 /* clear wol status, enable energy detection */
1457 val &= ~PM_CTL_WUPS_;
1458 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1459
1460 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1461 if (ret < 0)
1462 return ret;
1463
1464 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1465
1466 return 0;
1467 }
1468
1469 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1470 {
1471 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1472 u32 val;
1473 int ret;
1474
1475 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1476 if (ret < 0)
1477 return ret;
1478
1479 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1480 val |= PM_CTL_SUS_MODE_2;
1481
1482 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1483 if (ret < 0)
1484 return ret;
1485
1486 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1487
1488 return 0;
1489 }
1490
1491 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1492 {
1493 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1494 u32 val;
1495 int ret;
1496
1497 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1498 if (ret < 0)
1499 return ret;
1500
1501 if (val & 0xFFFF) {
1502 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1503 return -EBUSY;
1504 }
1505
1506 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1507 if (ret < 0)
1508 return ret;
1509
1510 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1511 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1512
1513 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1514 if (ret < 0)
1515 return ret;
1516
1517 /* clear wol status */
1518 val &= ~PM_CTL_WUPS_;
1519 val |= PM_CTL_WUPS_WOL_;
1520
1521 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1522 if (ret < 0)
1523 return ret;
1524
1525 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1526
1527 return 0;
1528 }
1529
1530 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1531 {
1532 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1533 int ret;
1534
1535 if (!netif_running(dev->net)) {
1536 /* interface is ifconfig down so fully power down hw */
1537 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1538 return smsc95xx_enter_suspend2(dev);
1539 }
1540
1541 if (!link_up) {
1542 /* link is down so enter EDPD mode, but only if device can
1543 * reliably resume from it. This check should be redundant
1544 * as current FEATURE_REMOTE_WAKEUP parts also support
1545 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1546 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1547 netdev_warn(dev->net, "EDPD not supported\n");
1548 return -EBUSY;
1549 }
1550
1551 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1552
1553 /* enable PHY wakeup events for if cable is attached */
1554 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1555 PHY_INT_MASK_ANEG_COMP_);
1556 if (ret < 0) {
1557 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1558 return ret;
1559 }
1560
1561 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1562 return smsc95xx_enter_suspend1(dev);
1563 }
1564
1565 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1566 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1567 PHY_INT_MASK_LINK_DOWN_);
1568 if (ret < 0) {
1569 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1570 return ret;
1571 }
1572
1573 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1574 return smsc95xx_enter_suspend3(dev);
1575 }
1576
1577 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1578 {
1579 struct usbnet *dev = usb_get_intfdata(intf);
1580 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1581 u32 val, link_up;
1582 int ret;
1583
1584 ret = usbnet_suspend(intf, message);
1585 if (ret < 0) {
1586 netdev_warn(dev->net, "usbnet_suspend error\n");
1587 return ret;
1588 }
1589
1590 if (pdata->suspend_flags) {
1591 netdev_warn(dev->net, "error during last resume\n");
1592 pdata->suspend_flags = 0;
1593 }
1594
1595 /* determine if link is up using only _nopm functions */
1596 link_up = smsc95xx_link_ok_nopm(dev);
1597
1598 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1599 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1600 ret = smsc95xx_autosuspend(dev, link_up);
1601 goto done;
1602 }
1603
1604 /* if we get this far we're not autosuspending */
1605 /* if no wol options set, or if link is down and we're not waking on
1606 * PHY activity, enter lowest power SUSPEND2 mode
1607 */
1608 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1609 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1610 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1611
1612 /* disable energy detect (link up) & wake up events */
1613 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1614 if (ret < 0)
1615 goto done;
1616
1617 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1618
1619 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1620 if (ret < 0)
1621 goto done;
1622
1623 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1624 if (ret < 0)
1625 goto done;
1626
1627 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1628
1629 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1630 if (ret < 0)
1631 goto done;
1632
1633 ret = smsc95xx_enter_suspend2(dev);
1634 goto done;
1635 }
1636
1637 if (pdata->wolopts & WAKE_PHY) {
1638 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1639 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1640 if (ret < 0) {
1641 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1642 goto done;
1643 }
1644
1645 /* if link is down then configure EDPD and enter SUSPEND1,
1646 * otherwise enter SUSPEND0 below
1647 */
1648 if (!link_up) {
1649 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1650 ret = smsc95xx_enter_suspend1(dev);
1651 goto done;
1652 }
1653 }
1654
1655 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1656 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1657 u32 command[2];
1658 u32 offset[2];
1659 u32 crc[4];
1660 int wuff_filter_count =
1661 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1662 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1663 int i, filter = 0;
1664
1665 if (!filter_mask) {
1666 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1667 ret = -ENOMEM;
1668 goto done;
1669 }
1670
1671 memset(command, 0, sizeof(command));
1672 memset(offset, 0, sizeof(offset));
1673 memset(crc, 0, sizeof(crc));
1674
1675 if (pdata->wolopts & WAKE_BCAST) {
1676 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1677 netdev_info(dev->net, "enabling broadcast detection\n");
1678 filter_mask[filter * 4] = 0x003F;
1679 filter_mask[filter * 4 + 1] = 0x00;
1680 filter_mask[filter * 4 + 2] = 0x00;
1681 filter_mask[filter * 4 + 3] = 0x00;
1682 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1683 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1684 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1685 filter++;
1686 }
1687
1688 if (pdata->wolopts & WAKE_MCAST) {
1689 const u8 mcast[] = {0x01, 0x00, 0x5E};
1690 netdev_info(dev->net, "enabling multicast detection\n");
1691 filter_mask[filter * 4] = 0x0007;
1692 filter_mask[filter * 4 + 1] = 0x00;
1693 filter_mask[filter * 4 + 2] = 0x00;
1694 filter_mask[filter * 4 + 3] = 0x00;
1695 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1696 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1697 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1698 filter++;
1699 }
1700
1701 if (pdata->wolopts & WAKE_ARP) {
1702 const u8 arp[] = {0x08, 0x06};
1703 netdev_info(dev->net, "enabling ARP detection\n");
1704 filter_mask[filter * 4] = 0x0003;
1705 filter_mask[filter * 4 + 1] = 0x00;
1706 filter_mask[filter * 4 + 2] = 0x00;
1707 filter_mask[filter * 4 + 3] = 0x00;
1708 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1709 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1710 crc[filter/2] |= smsc_crc(arp, 2, filter);
1711 filter++;
1712 }
1713
1714 if (pdata->wolopts & WAKE_UCAST) {
1715 netdev_info(dev->net, "enabling unicast detection\n");
1716 filter_mask[filter * 4] = 0x003F;
1717 filter_mask[filter * 4 + 1] = 0x00;
1718 filter_mask[filter * 4 + 2] = 0x00;
1719 filter_mask[filter * 4 + 3] = 0x00;
1720 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1721 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1722 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1723 filter++;
1724 }
1725
1726 for (i = 0; i < (wuff_filter_count * 4); i++) {
1727 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1728 if (ret < 0) {
1729 kfree(filter_mask);
1730 goto done;
1731 }
1732 }
1733 kfree(filter_mask);
1734
1735 for (i = 0; i < (wuff_filter_count / 4); i++) {
1736 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1737 if (ret < 0)
1738 goto done;
1739 }
1740
1741 for (i = 0; i < (wuff_filter_count / 4); i++) {
1742 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1743 if (ret < 0)
1744 goto done;
1745 }
1746
1747 for (i = 0; i < (wuff_filter_count / 2); i++) {
1748 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1749 if (ret < 0)
1750 goto done;
1751 }
1752
1753 /* clear any pending pattern match packet status */
1754 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1755 if (ret < 0)
1756 goto done;
1757
1758 val |= WUCSR_WUFR_;
1759
1760 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1761 if (ret < 0)
1762 goto done;
1763 }
1764
1765 if (pdata->wolopts & WAKE_MAGIC) {
1766 /* clear any pending magic packet status */
1767 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1768 if (ret < 0)
1769 goto done;
1770
1771 val |= WUCSR_MPR_;
1772
1773 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1774 if (ret < 0)
1775 goto done;
1776 }
1777
1778 /* enable/disable wakeup sources */
1779 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1780 if (ret < 0)
1781 goto done;
1782
1783 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1784 netdev_info(dev->net, "enabling pattern match wakeup\n");
1785 val |= WUCSR_WAKE_EN_;
1786 } else {
1787 netdev_info(dev->net, "disabling pattern match wakeup\n");
1788 val &= ~WUCSR_WAKE_EN_;
1789 }
1790
1791 if (pdata->wolopts & WAKE_MAGIC) {
1792 netdev_info(dev->net, "enabling magic packet wakeup\n");
1793 val |= WUCSR_MPEN_;
1794 } else {
1795 netdev_info(dev->net, "disabling magic packet wakeup\n");
1796 val &= ~WUCSR_MPEN_;
1797 }
1798
1799 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1800 if (ret < 0)
1801 goto done;
1802
1803 /* enable wol wakeup source */
1804 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1805 if (ret < 0)
1806 goto done;
1807
1808 val |= PM_CTL_WOL_EN_;
1809
1810 /* phy energy detect wakeup source */
1811 if (pdata->wolopts & WAKE_PHY)
1812 val |= PM_CTL_ED_EN_;
1813
1814 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1815 if (ret < 0)
1816 goto done;
1817
1818 /* enable receiver to enable frame reception */
1819 smsc95xx_start_rx_path(dev, 1);
1820
1821 /* some wol options are enabled, so enter SUSPEND0 */
1822 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1823 ret = smsc95xx_enter_suspend0(dev);
1824
1825 done:
1826 /*
1827 * TODO: resume() might need to handle the suspend failure
1828 * in system sleep
1829 */
1830 if (ret && PMSG_IS_AUTO(message))
1831 usbnet_resume(intf);
1832 return ret;
1833 }
1834
1835 static int smsc95xx_resume(struct usb_interface *intf)
1836 {
1837 struct usbnet *dev = usb_get_intfdata(intf);
1838 struct smsc95xx_priv *pdata;
1839 u8 suspend_flags;
1840 int ret;
1841 u32 val;
1842
1843 BUG_ON(!dev);
1844 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1845 suspend_flags = pdata->suspend_flags;
1846
1847 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1848
1849 /* do this first to ensure it's cleared even in error case */
1850 pdata->suspend_flags = 0;
1851 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1852
1853 if (suspend_flags & SUSPEND_ALLMODES) {
1854 /* clear wake-up sources */
1855 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1856 if (ret < 0)
1857 return ret;
1858
1859 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1860
1861 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1862 if (ret < 0)
1863 return ret;
1864
1865 /* clear wake-up status */
1866 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1867 if (ret < 0)
1868 return ret;
1869
1870 val &= ~PM_CTL_WOL_EN_;
1871 val |= PM_CTL_WUPS_;
1872
1873 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1874 if (ret < 0)
1875 return ret;
1876 }
1877
1878 ret = usbnet_resume(intf);
1879 if (ret < 0)
1880 netdev_warn(dev->net, "usbnet_resume error\n");
1881
1882 return ret;
1883 }
1884
1885 static int smsc95xx_reset_resume(struct usb_interface *intf)
1886 {
1887 struct usbnet *dev = usb_get_intfdata(intf);
1888 int ret;
1889
1890 ret = smsc95xx_reset(dev);
1891 if (ret < 0)
1892 return ret;
1893
1894 return smsc95xx_resume(intf);
1895 }
1896
1897 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1898 {
1899 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1900 skb->ip_summed = CHECKSUM_COMPLETE;
1901 skb_trim(skb, skb->len - 2);
1902 }
1903
1904 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1905 {
1906 /* This check is no longer done by usbnet */
1907 if (skb->len < dev->net->hard_header_len)
1908 return 0;
1909
1910 while (skb->len > 0) {
1911 u32 header, align_count;
1912 struct sk_buff *ax_skb;
1913 unsigned char *packet;
1914 u16 size;
1915
1916 memcpy(&header, skb->data, sizeof(header));
1917 le32_to_cpus(&header);
1918 skb_pull(skb, 4 + NET_IP_ALIGN);
1919 packet = skb->data;
1920
1921 /* get the packet length */
1922 size = (u16)((header & RX_STS_FL_) >> 16);
1923 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1924
1925 if (unlikely(header & RX_STS_ES_)) {
1926 netif_dbg(dev, rx_err, dev->net,
1927 "Error header=0x%08x\n", header);
1928 dev->net->stats.rx_errors++;
1929 dev->net->stats.rx_dropped++;
1930
1931 if (header & RX_STS_CRC_) {
1932 dev->net->stats.rx_crc_errors++;
1933 } else {
1934 if (header & (RX_STS_TL_ | RX_STS_RF_))
1935 dev->net->stats.rx_frame_errors++;
1936
1937 if ((header & RX_STS_LE_) &&
1938 (!(header & RX_STS_FT_)))
1939 dev->net->stats.rx_length_errors++;
1940 }
1941 } else {
1942 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1943 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1944 netif_dbg(dev, rx_err, dev->net,
1945 "size err header=0x%08x\n", header);
1946 return 0;
1947 }
1948
1949 /* last frame in this batch */
1950 if (skb->len == size) {
1951 if (dev->net->features & NETIF_F_RXCSUM)
1952 smsc95xx_rx_csum_offload(skb);
1953 skb_trim(skb, skb->len - 4); /* remove fcs */
1954 skb->truesize = size + sizeof(struct sk_buff);
1955
1956 return 1;
1957 }
1958
1959 ax_skb = skb_clone(skb, GFP_ATOMIC);
1960 if (unlikely(!ax_skb)) {
1961 netdev_warn(dev->net, "Error allocating skb\n");
1962 return 0;
1963 }
1964
1965 ax_skb->len = size;
1966 ax_skb->data = packet;
1967 skb_set_tail_pointer(ax_skb, size);
1968
1969 if (dev->net->features & NETIF_F_RXCSUM)
1970 smsc95xx_rx_csum_offload(ax_skb);
1971 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1972 ax_skb->truesize = size + sizeof(struct sk_buff);
1973
1974 usbnet_skb_return(dev, ax_skb);
1975 }
1976
1977 skb_pull(skb, size);
1978
1979 /* padding bytes before the next frame starts */
1980 if (skb->len)
1981 skb_pull(skb, align_count);
1982 }
1983
1984 return 1;
1985 }
1986
1987 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1988 {
1989 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1990 u16 high_16 = low_16 + skb->csum_offset;
1991 return (high_16 << 16) | low_16;
1992 }
1993
1994 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1995 struct sk_buff *skb, gfp_t flags)
1996 {
1997 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1998 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1999 u32 tx_cmd_a, tx_cmd_b;
2000
2001 /* We do not advertise SG, so skbs should be already linearized */
2002 BUG_ON(skb_shinfo(skb)->nr_frags);
2003
2004 if (skb_headroom(skb) < overhead) {
2005 struct sk_buff *skb2 = skb_copy_expand(skb,
2006 overhead, 0, flags);
2007 dev_kfree_skb_any(skb);
2008 skb = skb2;
2009 if (!skb)
2010 return NULL;
2011 }
2012
2013 if (csum) {
2014 if (skb->len <= 45) {
2015 /* workaround - hardware tx checksum does not work
2016 * properly with extremely small packets */
2017 long csstart = skb_checksum_start_offset(skb);
2018 __wsum calc = csum_partial(skb->data + csstart,
2019 skb->len - csstart, 0);
2020 *((__sum16 *)(skb->data + csstart
2021 + skb->csum_offset)) = csum_fold(calc);
2022
2023 csum = false;
2024 } else {
2025 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2026 skb_push(skb, 4);
2027 cpu_to_le32s(&csum_preamble);
2028 memcpy(skb->data, &csum_preamble, 4);
2029 }
2030 }
2031
2032 skb_push(skb, 4);
2033 tx_cmd_b = (u32)(skb->len - 4);
2034 if (csum)
2035 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2036 cpu_to_le32s(&tx_cmd_b);
2037 memcpy(skb->data, &tx_cmd_b, 4);
2038
2039 skb_push(skb, 4);
2040 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2041 TX_CMD_A_LAST_SEG_;
2042 cpu_to_le32s(&tx_cmd_a);
2043 memcpy(skb->data, &tx_cmd_a, 4);
2044
2045 return skb;
2046 }
2047
2048 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2049 {
2050 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2051
2052 dev->intf->needs_remote_wakeup = on;
2053
2054 if (pdata->features & FEATURE_REMOTE_WAKEUP)
2055 return 0;
2056
2057 /* this chip revision isn't capable of remote wakeup */
2058 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2059
2060 if (on)
2061 usb_autopm_get_interface_no_resume(dev->intf);
2062 else
2063 usb_autopm_put_interface(dev->intf);
2064
2065 return 0;
2066 }
2067
2068 static const struct driver_info smsc95xx_info = {
2069 .description = "smsc95xx USB 2.0 Ethernet",
2070 .bind = smsc95xx_bind,
2071 .unbind = smsc95xx_unbind,
2072 .link_reset = smsc95xx_link_reset,
2073 .reset = smsc95xx_reset,
2074 .rx_fixup = smsc95xx_rx_fixup,
2075 .tx_fixup = smsc95xx_tx_fixup,
2076 .status = smsc95xx_status,
2077 .manage_power = smsc95xx_manage_power,
2078 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2079 };
2080
2081 static const struct usb_device_id products[] = {
2082 {
2083 /* SMSC9500 USB Ethernet Device */
2084 USB_DEVICE(0x0424, 0x9500),
2085 .driver_info = (unsigned long) &smsc95xx_info,
2086 },
2087 {
2088 /* SMSC9505 USB Ethernet Device */
2089 USB_DEVICE(0x0424, 0x9505),
2090 .driver_info = (unsigned long) &smsc95xx_info,
2091 },
2092 {
2093 /* SMSC9500A USB Ethernet Device */
2094 USB_DEVICE(0x0424, 0x9E00),
2095 .driver_info = (unsigned long) &smsc95xx_info,
2096 },
2097 {
2098 /* SMSC9505A USB Ethernet Device */
2099 USB_DEVICE(0x0424, 0x9E01),
2100 .driver_info = (unsigned long) &smsc95xx_info,
2101 },
2102 {
2103 /* SMSC9512/9514 USB Hub & Ethernet Device */
2104 USB_DEVICE(0x0424, 0xec00),
2105 .driver_info = (unsigned long) &smsc95xx_info,
2106 },
2107 {
2108 /* SMSC9500 USB Ethernet Device (SAL10) */
2109 USB_DEVICE(0x0424, 0x9900),
2110 .driver_info = (unsigned long) &smsc95xx_info,
2111 },
2112 {
2113 /* SMSC9505 USB Ethernet Device (SAL10) */
2114 USB_DEVICE(0x0424, 0x9901),
2115 .driver_info = (unsigned long) &smsc95xx_info,
2116 },
2117 {
2118 /* SMSC9500A USB Ethernet Device (SAL10) */
2119 USB_DEVICE(0x0424, 0x9902),
2120 .driver_info = (unsigned long) &smsc95xx_info,
2121 },
2122 {
2123 /* SMSC9505A USB Ethernet Device (SAL10) */
2124 USB_DEVICE(0x0424, 0x9903),
2125 .driver_info = (unsigned long) &smsc95xx_info,
2126 },
2127 {
2128 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2129 USB_DEVICE(0x0424, 0x9904),
2130 .driver_info = (unsigned long) &smsc95xx_info,
2131 },
2132 {
2133 /* SMSC9500A USB Ethernet Device (HAL) */
2134 USB_DEVICE(0x0424, 0x9905),
2135 .driver_info = (unsigned long) &smsc95xx_info,
2136 },
2137 {
2138 /* SMSC9505A USB Ethernet Device (HAL) */
2139 USB_DEVICE(0x0424, 0x9906),
2140 .driver_info = (unsigned long) &smsc95xx_info,
2141 },
2142 {
2143 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2144 USB_DEVICE(0x0424, 0x9907),
2145 .driver_info = (unsigned long) &smsc95xx_info,
2146 },
2147 {
2148 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2149 USB_DEVICE(0x0424, 0x9908),
2150 .driver_info = (unsigned long) &smsc95xx_info,
2151 },
2152 {
2153 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2154 USB_DEVICE(0x0424, 0x9909),
2155 .driver_info = (unsigned long) &smsc95xx_info,
2156 },
2157 {
2158 /* SMSC LAN9530 USB Ethernet Device */
2159 USB_DEVICE(0x0424, 0x9530),
2160 .driver_info = (unsigned long) &smsc95xx_info,
2161 },
2162 {
2163 /* SMSC LAN9730 USB Ethernet Device */
2164 USB_DEVICE(0x0424, 0x9730),
2165 .driver_info = (unsigned long) &smsc95xx_info,
2166 },
2167 {
2168 /* SMSC LAN89530 USB Ethernet Device */
2169 USB_DEVICE(0x0424, 0x9E08),
2170 .driver_info = (unsigned long) &smsc95xx_info,
2171 },
2172 { }, /* END */
2173 };
2174 MODULE_DEVICE_TABLE(usb, products);
2175
2176 static struct usb_driver smsc95xx_driver = {
2177 .name = "smsc95xx",
2178 .id_table = products,
2179 .probe = usbnet_probe,
2180 .suspend = smsc95xx_suspend,
2181 .resume = smsc95xx_resume,
2182 .reset_resume = smsc95xx_reset_resume,
2183 .disconnect = usbnet_disconnect,
2184 .disable_hub_initiated_lpm = 1,
2185 .supports_autosuspend = 1,
2186 };
2187
2188 module_usb_driver(smsc95xx_driver);
2189
2190 MODULE_AUTHOR("Nancy Lin");
2191 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2192 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2193 MODULE_LICENSE("GPL");
Linux with added FPC-III support