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regmap-i2c: Use i2c block command only if register value width is 8 bit
[deliverable/linux.git] / drivers / net / usb / smsc95xx.c
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 "1.0.4"
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 struct smsc95xx_priv {
65 u32 mac_cr;
66 u32 hash_hi;
67 u32 hash_lo;
68 u32 wolopts;
69 spinlock_t mac_cr_lock;
70 u8 features;
71 u8 suspend_flags;
72 };
73
74 static bool turbo_mode = true;
75 module_param(turbo_mode, bool, 0644);
76 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
77
78 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
79 u32 *data, int in_pm)
80 {
81 u32 buf;
82 int ret;
83 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
84
85 BUG_ON(!dev);
86
87 if (!in_pm)
88 fn = usbnet_read_cmd;
89 else
90 fn = usbnet_read_cmd_nopm;
91
92 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
93 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
94 0, index, &buf, 4);
95 if (unlikely(ret < 0)) {
96 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
97 index, ret);
98 return ret;
99 }
100
101 le32_to_cpus(&buf);
102 *data = buf;
103
104 return ret;
105 }
106
107 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
108 u32 data, int in_pm)
109 {
110 u32 buf;
111 int ret;
112 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
113
114 BUG_ON(!dev);
115
116 if (!in_pm)
117 fn = usbnet_write_cmd;
118 else
119 fn = usbnet_write_cmd_nopm;
120
121 buf = data;
122 cpu_to_le32s(&buf);
123
124 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
125 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
126 0, index, &buf, 4);
127 if (unlikely(ret < 0))
128 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
129 index, ret);
130
131 return ret;
132 }
133
134 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
135 u32 *data)
136 {
137 return __smsc95xx_read_reg(dev, index, data, 1);
138 }
139
140 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
141 u32 data)
142 {
143 return __smsc95xx_write_reg(dev, index, data, 1);
144 }
145
146 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
147 u32 *data)
148 {
149 return __smsc95xx_read_reg(dev, index, data, 0);
150 }
151
152 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
153 u32 data)
154 {
155 return __smsc95xx_write_reg(dev, index, data, 0);
156 }
157
158 /* Loop until the read is completed with timeout
159 * called with phy_mutex held */
160 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
161 int in_pm)
162 {
163 unsigned long start_time = jiffies;
164 u32 val;
165 int ret;
166
167 do {
168 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
169 if (ret < 0) {
170 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
171 return ret;
172 }
173
174 if (!(val & MII_BUSY_))
175 return 0;
176 } while (!time_after(jiffies, start_time + HZ));
177
178 return -EIO;
179 }
180
181 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
182 int in_pm)
183 {
184 struct usbnet *dev = netdev_priv(netdev);
185 u32 val, addr;
186 int ret;
187
188 mutex_lock(&dev->phy_mutex);
189
190 /* confirm MII not busy */
191 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
192 if (ret < 0) {
193 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
194 goto done;
195 }
196
197 /* set the address, index & direction (read from PHY) */
198 phy_id &= dev->mii.phy_id_mask;
199 idx &= dev->mii.reg_num_mask;
200 addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
201 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
202 if (ret < 0) {
203 netdev_warn(dev->net, "Error writing MII_ADDR\n");
204 goto done;
205 }
206
207 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
208 if (ret < 0) {
209 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
210 goto done;
211 }
212
213 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
214 if (ret < 0) {
215 netdev_warn(dev->net, "Error reading MII_DATA\n");
216 goto done;
217 }
218
219 ret = (u16)(val & 0xFFFF);
220
221 done:
222 mutex_unlock(&dev->phy_mutex);
223 return ret;
224 }
225
226 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
227 int idx, int regval, int in_pm)
228 {
229 struct usbnet *dev = netdev_priv(netdev);
230 u32 val, addr;
231 int ret;
232
233 mutex_lock(&dev->phy_mutex);
234
235 /* confirm MII not busy */
236 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
237 if (ret < 0) {
238 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
239 goto done;
240 }
241
242 val = regval;
243 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
244 if (ret < 0) {
245 netdev_warn(dev->net, "Error writing MII_DATA\n");
246 goto done;
247 }
248
249 /* set the address, index & direction (write to PHY) */
250 phy_id &= dev->mii.phy_id_mask;
251 idx &= dev->mii.reg_num_mask;
252 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
253 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
254 if (ret < 0) {
255 netdev_warn(dev->net, "Error writing MII_ADDR\n");
256 goto done;
257 }
258
259 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
260 if (ret < 0) {
261 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
262 goto done;
263 }
264
265 done:
266 mutex_unlock(&dev->phy_mutex);
267 }
268
269 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
270 int idx)
271 {
272 return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
273 }
274
275 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
276 int idx, int regval)
277 {
278 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
279 }
280
281 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
282 {
283 return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
284 }
285
286 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
287 int regval)
288 {
289 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
290 }
291
292 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
293 {
294 unsigned long start_time = jiffies;
295 u32 val;
296 int ret;
297
298 do {
299 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
300 if (ret < 0) {
301 netdev_warn(dev->net, "Error reading E2P_CMD\n");
302 return ret;
303 }
304
305 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
306 break;
307 udelay(40);
308 } while (!time_after(jiffies, start_time + HZ));
309
310 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
311 netdev_warn(dev->net, "EEPROM read operation timeout\n");
312 return -EIO;
313 }
314
315 return 0;
316 }
317
318 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
319 {
320 unsigned long start_time = jiffies;
321 u32 val;
322 int ret;
323
324 do {
325 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
326 if (ret < 0) {
327 netdev_warn(dev->net, "Error reading E2P_CMD\n");
328 return ret;
329 }
330
331 if (!(val & E2P_CMD_BUSY_))
332 return 0;
333
334 udelay(40);
335 } while (!time_after(jiffies, start_time + HZ));
336
337 netdev_warn(dev->net, "EEPROM is busy\n");
338 return -EIO;
339 }
340
341 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
342 u8 *data)
343 {
344 u32 val;
345 int i, ret;
346
347 BUG_ON(!dev);
348 BUG_ON(!data);
349
350 ret = smsc95xx_eeprom_confirm_not_busy(dev);
351 if (ret)
352 return ret;
353
354 for (i = 0; i < length; i++) {
355 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
356 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
357 if (ret < 0) {
358 netdev_warn(dev->net, "Error writing E2P_CMD\n");
359 return ret;
360 }
361
362 ret = smsc95xx_wait_eeprom(dev);
363 if (ret < 0)
364 return ret;
365
366 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
367 if (ret < 0) {
368 netdev_warn(dev->net, "Error reading E2P_DATA\n");
369 return ret;
370 }
371
372 data[i] = val & 0xFF;
373 offset++;
374 }
375
376 return 0;
377 }
378
379 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
380 u8 *data)
381 {
382 u32 val;
383 int i, ret;
384
385 BUG_ON(!dev);
386 BUG_ON(!data);
387
388 ret = smsc95xx_eeprom_confirm_not_busy(dev);
389 if (ret)
390 return ret;
391
392 /* Issue write/erase enable command */
393 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
394 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
395 if (ret < 0) {
396 netdev_warn(dev->net, "Error writing E2P_DATA\n");
397 return ret;
398 }
399
400 ret = smsc95xx_wait_eeprom(dev);
401 if (ret < 0)
402 return ret;
403
404 for (i = 0; i < length; i++) {
405
406 /* Fill data register */
407 val = data[i];
408 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
409 if (ret < 0) {
410 netdev_warn(dev->net, "Error writing E2P_DATA\n");
411 return ret;
412 }
413
414 /* Send "write" command */
415 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
416 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
417 if (ret < 0) {
418 netdev_warn(dev->net, "Error writing E2P_CMD\n");
419 return ret;
420 }
421
422 ret = smsc95xx_wait_eeprom(dev);
423 if (ret < 0)
424 return ret;
425
426 offset++;
427 }
428
429 return 0;
430 }
431
432 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
433 u32 data)
434 {
435 const u16 size = 4;
436 u32 buf;
437 int ret;
438
439 buf = data;
440 cpu_to_le32s(&buf);
441
442 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
443 USB_DIR_OUT | USB_TYPE_VENDOR |
444 USB_RECIP_DEVICE,
445 0, index, &buf, size);
446 if (ret < 0)
447 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
448 ret);
449 return ret;
450 }
451
452 /* returns hash bit number for given MAC address
453 * example:
454 * 01 00 5E 00 00 01 -> returns bit number 31 */
455 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
456 {
457 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
458 }
459
460 static void smsc95xx_set_multicast(struct net_device *netdev)
461 {
462 struct usbnet *dev = netdev_priv(netdev);
463 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
464 unsigned long flags;
465 int ret;
466
467 pdata->hash_hi = 0;
468 pdata->hash_lo = 0;
469
470 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
471
472 if (dev->net->flags & IFF_PROMISC) {
473 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
474 pdata->mac_cr |= MAC_CR_PRMS_;
475 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
476 } else if (dev->net->flags & IFF_ALLMULTI) {
477 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
478 pdata->mac_cr |= MAC_CR_MCPAS_;
479 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
480 } else if (!netdev_mc_empty(dev->net)) {
481 struct netdev_hw_addr *ha;
482
483 pdata->mac_cr |= MAC_CR_HPFILT_;
484 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
485
486 netdev_for_each_mc_addr(ha, netdev) {
487 u32 bitnum = smsc95xx_hash(ha->addr);
488 u32 mask = 0x01 << (bitnum & 0x1F);
489 if (bitnum & 0x20)
490 pdata->hash_hi |= mask;
491 else
492 pdata->hash_lo |= mask;
493 }
494
495 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
496 pdata->hash_hi, pdata->hash_lo);
497 } else {
498 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
499 pdata->mac_cr &=
500 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
501 }
502
503 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
504
505 /* Initiate async writes, as we can't wait for completion here */
506 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
507 if (ret < 0)
508 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
509
510 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
511 if (ret < 0)
512 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
513
514 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
515 if (ret < 0)
516 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
517 }
518
519 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
520 u16 lcladv, u16 rmtadv)
521 {
522 u32 flow, afc_cfg = 0;
523
524 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
525 if (ret < 0)
526 return ret;
527
528 if (duplex == DUPLEX_FULL) {
529 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
530
531 if (cap & FLOW_CTRL_RX)
532 flow = 0xFFFF0002;
533 else
534 flow = 0;
535
536 if (cap & FLOW_CTRL_TX)
537 afc_cfg |= 0xF;
538 else
539 afc_cfg &= ~0xF;
540
541 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
542 cap & FLOW_CTRL_RX ? "enabled" : "disabled",
543 cap & FLOW_CTRL_TX ? "enabled" : "disabled");
544 } else {
545 netif_dbg(dev, link, dev->net, "half duplex\n");
546 flow = 0;
547 afc_cfg |= 0xF;
548 }
549
550 ret = smsc95xx_write_reg(dev, FLOW, flow);
551 if (ret < 0)
552 return ret;
553
554 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
555 }
556
557 static int smsc95xx_link_reset(struct usbnet *dev)
558 {
559 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
560 struct mii_if_info *mii = &dev->mii;
561 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
562 unsigned long flags;
563 u16 lcladv, rmtadv;
564 int ret;
565
566 /* clear interrupt status */
567 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
568 if (ret < 0)
569 return ret;
570
571 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
572 if (ret < 0)
573 return ret;
574
575 mii_check_media(mii, 1, 1);
576 mii_ethtool_gset(&dev->mii, &ecmd);
577 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
578 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
579
580 netif_dbg(dev, link, dev->net,
581 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
582 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
583
584 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
585 if (ecmd.duplex != DUPLEX_FULL) {
586 pdata->mac_cr &= ~MAC_CR_FDPX_;
587 pdata->mac_cr |= MAC_CR_RCVOWN_;
588 } else {
589 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
590 pdata->mac_cr |= MAC_CR_FDPX_;
591 }
592 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
593
594 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
595 if (ret < 0)
596 return ret;
597
598 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
599 if (ret < 0)
600 netdev_warn(dev->net, "Error updating PHY flow control\n");
601
602 return ret;
603 }
604
605 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
606 {
607 u32 intdata;
608
609 if (urb->actual_length != 4) {
610 netdev_warn(dev->net, "unexpected urb length %d\n",
611 urb->actual_length);
612 return;
613 }
614
615 memcpy(&intdata, urb->transfer_buffer, 4);
616 le32_to_cpus(&intdata);
617
618 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
619
620 if (intdata & INT_ENP_PHY_INT_)
621 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
622 else
623 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
624 intdata);
625 }
626
627 /* Enable or disable Tx & Rx checksum offload engines */
628 static int smsc95xx_set_features(struct net_device *netdev,
629 netdev_features_t features)
630 {
631 struct usbnet *dev = netdev_priv(netdev);
632 u32 read_buf;
633 int ret;
634
635 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
636 if (ret < 0)
637 return ret;
638
639 if (features & NETIF_F_HW_CSUM)
640 read_buf |= Tx_COE_EN_;
641 else
642 read_buf &= ~Tx_COE_EN_;
643
644 if (features & NETIF_F_RXCSUM)
645 read_buf |= Rx_COE_EN_;
646 else
647 read_buf &= ~Rx_COE_EN_;
648
649 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
650 if (ret < 0)
651 return ret;
652
653 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
654 return 0;
655 }
656
657 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
658 {
659 return MAX_EEPROM_SIZE;
660 }
661
662 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
663 struct ethtool_eeprom *ee, u8 *data)
664 {
665 struct usbnet *dev = netdev_priv(netdev);
666
667 ee->magic = LAN95XX_EEPROM_MAGIC;
668
669 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
670 }
671
672 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
673 struct ethtool_eeprom *ee, u8 *data)
674 {
675 struct usbnet *dev = netdev_priv(netdev);
676
677 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
678 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
679 ee->magic);
680 return -EINVAL;
681 }
682
683 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
684 }
685
686 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
687 {
688 /* all smsc95xx registers */
689 return COE_CR - ID_REV + sizeof(u32);
690 }
691
692 static void
693 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
694 void *buf)
695 {
696 struct usbnet *dev = netdev_priv(netdev);
697 unsigned int i, j;
698 int retval;
699 u32 *data = buf;
700
701 retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
702 if (retval < 0) {
703 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
704 return;
705 }
706
707 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
708 retval = smsc95xx_read_reg(dev, i, &data[j]);
709 if (retval < 0) {
710 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
711 return;
712 }
713 }
714 }
715
716 static void smsc95xx_ethtool_get_wol(struct net_device *net,
717 struct ethtool_wolinfo *wolinfo)
718 {
719 struct usbnet *dev = netdev_priv(net);
720 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
721
722 wolinfo->supported = SUPPORTED_WAKE;
723 wolinfo->wolopts = pdata->wolopts;
724 }
725
726 static int smsc95xx_ethtool_set_wol(struct net_device *net,
727 struct ethtool_wolinfo *wolinfo)
728 {
729 struct usbnet *dev = netdev_priv(net);
730 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
731 int ret;
732
733 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
734
735 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
736 if (ret < 0)
737 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
738
739 return ret;
740 }
741
742 static const struct ethtool_ops smsc95xx_ethtool_ops = {
743 .get_link = usbnet_get_link,
744 .nway_reset = usbnet_nway_reset,
745 .get_drvinfo = usbnet_get_drvinfo,
746 .get_msglevel = usbnet_get_msglevel,
747 .set_msglevel = usbnet_set_msglevel,
748 .get_settings = usbnet_get_settings,
749 .set_settings = usbnet_set_settings,
750 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
751 .get_eeprom = smsc95xx_ethtool_get_eeprom,
752 .set_eeprom = smsc95xx_ethtool_set_eeprom,
753 .get_regs_len = smsc95xx_ethtool_getregslen,
754 .get_regs = smsc95xx_ethtool_getregs,
755 .get_wol = smsc95xx_ethtool_get_wol,
756 .set_wol = smsc95xx_ethtool_set_wol,
757 };
758
759 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
760 {
761 struct usbnet *dev = netdev_priv(netdev);
762
763 if (!netif_running(netdev))
764 return -EINVAL;
765
766 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
767 }
768
769 static void smsc95xx_init_mac_address(struct usbnet *dev)
770 {
771 const u8 *mac_addr;
772
773 /* maybe the boot loader passed the MAC address in devicetree */
774 mac_addr = of_get_mac_address(dev->udev->dev.of_node);
775 if (mac_addr) {
776 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
777 return;
778 }
779
780 /* try reading mac address from EEPROM */
781 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
782 dev->net->dev_addr) == 0) {
783 if (is_valid_ether_addr(dev->net->dev_addr)) {
784 /* eeprom values are valid so use them */
785 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
786 return;
787 }
788 }
789
790 /* no useful static MAC address found. generate a random one */
791 eth_hw_addr_random(dev->net);
792 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
793 }
794
795 static int smsc95xx_set_mac_address(struct usbnet *dev)
796 {
797 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
798 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
799 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
800 int ret;
801
802 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
803 if (ret < 0)
804 return ret;
805
806 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
807 }
808
809 /* starts the TX path */
810 static int smsc95xx_start_tx_path(struct usbnet *dev)
811 {
812 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
813 unsigned long flags;
814 int ret;
815
816 /* Enable Tx at MAC */
817 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
818 pdata->mac_cr |= MAC_CR_TXEN_;
819 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
820
821 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
822 if (ret < 0)
823 return ret;
824
825 /* Enable Tx at SCSRs */
826 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
827 }
828
829 /* Starts the Receive path */
830 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
831 {
832 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
833 unsigned long flags;
834
835 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
836 pdata->mac_cr |= MAC_CR_RXEN_;
837 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
838
839 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
840 }
841
842 static int smsc95xx_phy_initialize(struct usbnet *dev)
843 {
844 int bmcr, ret, timeout = 0;
845
846 /* Initialize MII structure */
847 dev->mii.dev = dev->net;
848 dev->mii.mdio_read = smsc95xx_mdio_read;
849 dev->mii.mdio_write = smsc95xx_mdio_write;
850 dev->mii.phy_id_mask = 0x1f;
851 dev->mii.reg_num_mask = 0x1f;
852 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
853
854 /* reset phy and wait for reset to complete */
855 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
856
857 do {
858 msleep(10);
859 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
860 timeout++;
861 } while ((bmcr & BMCR_RESET) && (timeout < 100));
862
863 if (timeout >= 100) {
864 netdev_warn(dev->net, "timeout on PHY Reset");
865 return -EIO;
866 }
867
868 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
869 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
870 ADVERTISE_PAUSE_ASYM);
871
872 /* read to clear */
873 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
874 if (ret < 0) {
875 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
876 return ret;
877 }
878
879 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
880 PHY_INT_MASK_DEFAULT_);
881 mii_nway_restart(&dev->mii);
882
883 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
884 return 0;
885 }
886
887 static int smsc95xx_reset(struct usbnet *dev)
888 {
889 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
890 u32 read_buf, write_buf, burst_cap;
891 int ret = 0, timeout;
892
893 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
894
895 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
896 if (ret < 0)
897 return ret;
898
899 timeout = 0;
900 do {
901 msleep(10);
902 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
903 if (ret < 0)
904 return ret;
905 timeout++;
906 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
907
908 if (timeout >= 100) {
909 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
910 return ret;
911 }
912
913 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
914 if (ret < 0)
915 return ret;
916
917 timeout = 0;
918 do {
919 msleep(10);
920 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
921 if (ret < 0)
922 return ret;
923 timeout++;
924 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
925
926 if (timeout >= 100) {
927 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
928 return ret;
929 }
930
931 ret = smsc95xx_set_mac_address(dev);
932 if (ret < 0)
933 return ret;
934
935 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
936 dev->net->dev_addr);
937
938 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
939 if (ret < 0)
940 return ret;
941
942 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
943 read_buf);
944
945 read_buf |= HW_CFG_BIR_;
946
947 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
948 if (ret < 0)
949 return ret;
950
951 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
952 if (ret < 0)
953 return ret;
954
955 netif_dbg(dev, ifup, dev->net,
956 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
957 read_buf);
958
959 if (!turbo_mode) {
960 burst_cap = 0;
961 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
962 } else if (dev->udev->speed == USB_SPEED_HIGH) {
963 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
964 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
965 } else {
966 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
967 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
968 }
969
970 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
971 (ulong)dev->rx_urb_size);
972
973 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
974 if (ret < 0)
975 return ret;
976
977 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
978 if (ret < 0)
979 return ret;
980
981 netif_dbg(dev, ifup, dev->net,
982 "Read Value from BURST_CAP after writing: 0x%08x\n",
983 read_buf);
984
985 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
986 if (ret < 0)
987 return ret;
988
989 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
990 if (ret < 0)
991 return ret;
992
993 netif_dbg(dev, ifup, dev->net,
994 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
995 read_buf);
996
997 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
998 if (ret < 0)
999 return ret;
1000
1001 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1002 read_buf);
1003
1004 if (turbo_mode)
1005 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1006
1007 read_buf &= ~HW_CFG_RXDOFF_;
1008
1009 /* set Rx data offset=2, Make IP header aligns on word boundary. */
1010 read_buf |= NET_IP_ALIGN << 9;
1011
1012 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1013 if (ret < 0)
1014 return ret;
1015
1016 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1017 if (ret < 0)
1018 return ret;
1019
1020 netif_dbg(dev, ifup, dev->net,
1021 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1022
1023 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1024 if (ret < 0)
1025 return ret;
1026
1027 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1028 if (ret < 0)
1029 return ret;
1030 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1031
1032 /* Configure GPIO pins as LED outputs */
1033 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1034 LED_GPIO_CFG_FDX_LED;
1035 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1036 if (ret < 0)
1037 return ret;
1038
1039 /* Init Tx */
1040 ret = smsc95xx_write_reg(dev, FLOW, 0);
1041 if (ret < 0)
1042 return ret;
1043
1044 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1045 if (ret < 0)
1046 return ret;
1047
1048 /* Don't need mac_cr_lock during initialisation */
1049 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1050 if (ret < 0)
1051 return ret;
1052
1053 /* Init Rx */
1054 /* Set Vlan */
1055 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1056 if (ret < 0)
1057 return ret;
1058
1059 /* Enable or disable checksum offload engines */
1060 ret = smsc95xx_set_features(dev->net, dev->net->features);
1061 if (ret < 0) {
1062 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1063 return ret;
1064 }
1065
1066 smsc95xx_set_multicast(dev->net);
1067
1068 ret = smsc95xx_phy_initialize(dev);
1069 if (ret < 0) {
1070 netdev_warn(dev->net, "Failed to init PHY\n");
1071 return ret;
1072 }
1073
1074 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1075 if (ret < 0)
1076 return ret;
1077
1078 /* enable PHY interrupts */
1079 read_buf |= INT_EP_CTL_PHY_INT_;
1080
1081 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1082 if (ret < 0)
1083 return ret;
1084
1085 ret = smsc95xx_start_tx_path(dev);
1086 if (ret < 0) {
1087 netdev_warn(dev->net, "Failed to start TX path\n");
1088 return ret;
1089 }
1090
1091 ret = smsc95xx_start_rx_path(dev, 0);
1092 if (ret < 0) {
1093 netdev_warn(dev->net, "Failed to start RX path\n");
1094 return ret;
1095 }
1096
1097 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1098 return 0;
1099 }
1100
1101 static const struct net_device_ops smsc95xx_netdev_ops = {
1102 .ndo_open = usbnet_open,
1103 .ndo_stop = usbnet_stop,
1104 .ndo_start_xmit = usbnet_start_xmit,
1105 .ndo_tx_timeout = usbnet_tx_timeout,
1106 .ndo_change_mtu = usbnet_change_mtu,
1107 .ndo_set_mac_address = eth_mac_addr,
1108 .ndo_validate_addr = eth_validate_addr,
1109 .ndo_do_ioctl = smsc95xx_ioctl,
1110 .ndo_set_rx_mode = smsc95xx_set_multicast,
1111 .ndo_set_features = smsc95xx_set_features,
1112 };
1113
1114 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1115 {
1116 struct smsc95xx_priv *pdata = NULL;
1117 u32 val;
1118 int ret;
1119
1120 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1121
1122 ret = usbnet_get_endpoints(dev, intf);
1123 if (ret < 0) {
1124 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1125 return ret;
1126 }
1127
1128 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1129 GFP_KERNEL);
1130
1131 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1132 if (!pdata)
1133 return -ENOMEM;
1134
1135 spin_lock_init(&pdata->mac_cr_lock);
1136
1137 if (DEFAULT_TX_CSUM_ENABLE)
1138 dev->net->features |= NETIF_F_HW_CSUM;
1139 if (DEFAULT_RX_CSUM_ENABLE)
1140 dev->net->features |= NETIF_F_RXCSUM;
1141
1142 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1143
1144 smsc95xx_init_mac_address(dev);
1145
1146 /* Init all registers */
1147 ret = smsc95xx_reset(dev);
1148
1149 /* detect device revision as different features may be available */
1150 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1151 if (ret < 0)
1152 return ret;
1153 val >>= 16;
1154
1155 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1156 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1157 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1158 FEATURE_PHY_NLP_CROSSOVER |
1159 FEATURE_REMOTE_WAKEUP);
1160 else if (val == ID_REV_CHIP_ID_9512_)
1161 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1162
1163 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1164 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1165 dev->net->flags |= IFF_MULTICAST;
1166 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1167 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1168 return 0;
1169 }
1170
1171 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1172 {
1173 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1174 if (pdata) {
1175 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1176 kfree(pdata);
1177 pdata = NULL;
1178 dev->data[0] = 0;
1179 }
1180 }
1181
1182 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1183 {
1184 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1185 return crc << ((filter % 2) * 16);
1186 }
1187
1188 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1189 {
1190 struct mii_if_info *mii = &dev->mii;
1191 int ret;
1192
1193 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1194
1195 /* read to clear */
1196 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1197 if (ret < 0)
1198 return ret;
1199
1200 /* enable interrupt source */
1201 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1202 if (ret < 0)
1203 return ret;
1204
1205 ret |= mask;
1206
1207 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1208
1209 return 0;
1210 }
1211
1212 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1213 {
1214 struct mii_if_info *mii = &dev->mii;
1215 int ret;
1216
1217 /* first, a dummy read, needed to latch some MII phys */
1218 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1219 if (ret < 0)
1220 return ret;
1221
1222 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1223 if (ret < 0)
1224 return ret;
1225
1226 return !!(ret & BMSR_LSTATUS);
1227 }
1228
1229 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1230 {
1231 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1232 u32 val;
1233 int ret;
1234
1235 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1236 if (ret < 0)
1237 return ret;
1238
1239 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1240 val |= PM_CTL_SUS_MODE_0;
1241
1242 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1243 if (ret < 0)
1244 return ret;
1245
1246 /* clear wol status */
1247 val &= ~PM_CTL_WUPS_;
1248 val |= PM_CTL_WUPS_WOL_;
1249
1250 /* enable energy detection */
1251 if (pdata->wolopts & WAKE_PHY)
1252 val |= PM_CTL_WUPS_ED_;
1253
1254 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1255 if (ret < 0)
1256 return ret;
1257
1258 /* read back PM_CTRL */
1259 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1260 if (ret < 0)
1261 return ret;
1262
1263 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1264
1265 return 0;
1266 }
1267
1268 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1269 {
1270 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1271 struct mii_if_info *mii = &dev->mii;
1272 u32 val;
1273 int ret;
1274
1275 /* reconfigure link pulse detection timing for
1276 * compatibility with non-standard link partners
1277 */
1278 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1279 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1280 PHY_EDPD_CONFIG_DEFAULT);
1281
1282 /* enable energy detect power-down mode */
1283 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1284 if (ret < 0)
1285 return ret;
1286
1287 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1288
1289 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1290
1291 /* enter SUSPEND1 mode */
1292 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1293 if (ret < 0)
1294 return ret;
1295
1296 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1297 val |= PM_CTL_SUS_MODE_1;
1298
1299 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1300 if (ret < 0)
1301 return ret;
1302
1303 /* clear wol status, enable energy detection */
1304 val &= ~PM_CTL_WUPS_;
1305 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1306
1307 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1308 if (ret < 0)
1309 return ret;
1310
1311 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1312
1313 return 0;
1314 }
1315
1316 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1317 {
1318 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1319 u32 val;
1320 int ret;
1321
1322 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1323 if (ret < 0)
1324 return ret;
1325
1326 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1327 val |= PM_CTL_SUS_MODE_2;
1328
1329 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1330 if (ret < 0)
1331 return ret;
1332
1333 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1334
1335 return 0;
1336 }
1337
1338 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1339 {
1340 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1341 u32 val;
1342 int ret;
1343
1344 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1345 if (ret < 0)
1346 return ret;
1347
1348 if (val & 0xFFFF) {
1349 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1350 return -EBUSY;
1351 }
1352
1353 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1354 if (ret < 0)
1355 return ret;
1356
1357 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1358 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1359
1360 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1361 if (ret < 0)
1362 return ret;
1363
1364 /* clear wol status */
1365 val &= ~PM_CTL_WUPS_;
1366 val |= PM_CTL_WUPS_WOL_;
1367
1368 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1369 if (ret < 0)
1370 return ret;
1371
1372 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1373
1374 return 0;
1375 }
1376
1377 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1378 {
1379 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1380 int ret;
1381
1382 if (!netif_running(dev->net)) {
1383 /* interface is ifconfig down so fully power down hw */
1384 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1385 return smsc95xx_enter_suspend2(dev);
1386 }
1387
1388 if (!link_up) {
1389 /* link is down so enter EDPD mode, but only if device can
1390 * reliably resume from it. This check should be redundant
1391 * as current FEATURE_REMOTE_WAKEUP parts also support
1392 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1393 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1394 netdev_warn(dev->net, "EDPD not supported\n");
1395 return -EBUSY;
1396 }
1397
1398 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1399
1400 /* enable PHY wakeup events for if cable is attached */
1401 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1402 PHY_INT_MASK_ANEG_COMP_);
1403 if (ret < 0) {
1404 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1405 return ret;
1406 }
1407
1408 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1409 return smsc95xx_enter_suspend1(dev);
1410 }
1411
1412 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1413 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1414 PHY_INT_MASK_LINK_DOWN_);
1415 if (ret < 0) {
1416 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1417 return ret;
1418 }
1419
1420 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1421 return smsc95xx_enter_suspend3(dev);
1422 }
1423
1424 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1425 {
1426 struct usbnet *dev = usb_get_intfdata(intf);
1427 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1428 u32 val, link_up;
1429 int ret;
1430
1431 ret = usbnet_suspend(intf, message);
1432 if (ret < 0) {
1433 netdev_warn(dev->net, "usbnet_suspend error\n");
1434 return ret;
1435 }
1436
1437 if (pdata->suspend_flags) {
1438 netdev_warn(dev->net, "error during last resume\n");
1439 pdata->suspend_flags = 0;
1440 }
1441
1442 /* determine if link is up using only _nopm functions */
1443 link_up = smsc95xx_link_ok_nopm(dev);
1444
1445 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1446 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1447 ret = smsc95xx_autosuspend(dev, link_up);
1448 goto done;
1449 }
1450
1451 /* if we get this far we're not autosuspending */
1452 /* if no wol options set, or if link is down and we're not waking on
1453 * PHY activity, enter lowest power SUSPEND2 mode
1454 */
1455 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1456 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1457 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1458
1459 /* disable energy detect (link up) & wake up events */
1460 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1461 if (ret < 0)
1462 goto done;
1463
1464 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1465
1466 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1467 if (ret < 0)
1468 goto done;
1469
1470 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1471 if (ret < 0)
1472 goto done;
1473
1474 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1475
1476 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1477 if (ret < 0)
1478 goto done;
1479
1480 ret = smsc95xx_enter_suspend2(dev);
1481 goto done;
1482 }
1483
1484 if (pdata->wolopts & WAKE_PHY) {
1485 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1486 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1487 if (ret < 0) {
1488 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1489 goto done;
1490 }
1491
1492 /* if link is down then configure EDPD and enter SUSPEND1,
1493 * otherwise enter SUSPEND0 below
1494 */
1495 if (!link_up) {
1496 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1497 ret = smsc95xx_enter_suspend1(dev);
1498 goto done;
1499 }
1500 }
1501
1502 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1503 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1504 u32 command[2];
1505 u32 offset[2];
1506 u32 crc[4];
1507 int wuff_filter_count =
1508 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1509 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1510 int i, filter = 0;
1511
1512 if (!filter_mask) {
1513 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1514 ret = -ENOMEM;
1515 goto done;
1516 }
1517
1518 memset(command, 0, sizeof(command));
1519 memset(offset, 0, sizeof(offset));
1520 memset(crc, 0, sizeof(crc));
1521
1522 if (pdata->wolopts & WAKE_BCAST) {
1523 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1524 netdev_info(dev->net, "enabling broadcast detection\n");
1525 filter_mask[filter * 4] = 0x003F;
1526 filter_mask[filter * 4 + 1] = 0x00;
1527 filter_mask[filter * 4 + 2] = 0x00;
1528 filter_mask[filter * 4 + 3] = 0x00;
1529 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1530 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1531 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1532 filter++;
1533 }
1534
1535 if (pdata->wolopts & WAKE_MCAST) {
1536 const u8 mcast[] = {0x01, 0x00, 0x5E};
1537 netdev_info(dev->net, "enabling multicast detection\n");
1538 filter_mask[filter * 4] = 0x0007;
1539 filter_mask[filter * 4 + 1] = 0x00;
1540 filter_mask[filter * 4 + 2] = 0x00;
1541 filter_mask[filter * 4 + 3] = 0x00;
1542 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1543 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1544 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1545 filter++;
1546 }
1547
1548 if (pdata->wolopts & WAKE_ARP) {
1549 const u8 arp[] = {0x08, 0x06};
1550 netdev_info(dev->net, "enabling ARP detection\n");
1551 filter_mask[filter * 4] = 0x0003;
1552 filter_mask[filter * 4 + 1] = 0x00;
1553 filter_mask[filter * 4 + 2] = 0x00;
1554 filter_mask[filter * 4 + 3] = 0x00;
1555 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1556 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1557 crc[filter/2] |= smsc_crc(arp, 2, filter);
1558 filter++;
1559 }
1560
1561 if (pdata->wolopts & WAKE_UCAST) {
1562 netdev_info(dev->net, "enabling unicast detection\n");
1563 filter_mask[filter * 4] = 0x003F;
1564 filter_mask[filter * 4 + 1] = 0x00;
1565 filter_mask[filter * 4 + 2] = 0x00;
1566 filter_mask[filter * 4 + 3] = 0x00;
1567 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1568 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1569 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1570 filter++;
1571 }
1572
1573 for (i = 0; i < (wuff_filter_count * 4); i++) {
1574 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1575 if (ret < 0) {
1576 kfree(filter_mask);
1577 goto done;
1578 }
1579 }
1580 kfree(filter_mask);
1581
1582 for (i = 0; i < (wuff_filter_count / 4); i++) {
1583 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1584 if (ret < 0)
1585 goto done;
1586 }
1587
1588 for (i = 0; i < (wuff_filter_count / 4); i++) {
1589 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1590 if (ret < 0)
1591 goto done;
1592 }
1593
1594 for (i = 0; i < (wuff_filter_count / 2); i++) {
1595 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1596 if (ret < 0)
1597 goto done;
1598 }
1599
1600 /* clear any pending pattern match packet status */
1601 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1602 if (ret < 0)
1603 goto done;
1604
1605 val |= WUCSR_WUFR_;
1606
1607 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1608 if (ret < 0)
1609 goto done;
1610 }
1611
1612 if (pdata->wolopts & WAKE_MAGIC) {
1613 /* clear any pending magic packet status */
1614 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1615 if (ret < 0)
1616 goto done;
1617
1618 val |= WUCSR_MPR_;
1619
1620 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1621 if (ret < 0)
1622 goto done;
1623 }
1624
1625 /* enable/disable wakeup sources */
1626 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1627 if (ret < 0)
1628 goto done;
1629
1630 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1631 netdev_info(dev->net, "enabling pattern match wakeup\n");
1632 val |= WUCSR_WAKE_EN_;
1633 } else {
1634 netdev_info(dev->net, "disabling pattern match wakeup\n");
1635 val &= ~WUCSR_WAKE_EN_;
1636 }
1637
1638 if (pdata->wolopts & WAKE_MAGIC) {
1639 netdev_info(dev->net, "enabling magic packet wakeup\n");
1640 val |= WUCSR_MPEN_;
1641 } else {
1642 netdev_info(dev->net, "disabling magic packet wakeup\n");
1643 val &= ~WUCSR_MPEN_;
1644 }
1645
1646 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1647 if (ret < 0)
1648 goto done;
1649
1650 /* enable wol wakeup source */
1651 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1652 if (ret < 0)
1653 goto done;
1654
1655 val |= PM_CTL_WOL_EN_;
1656
1657 /* phy energy detect wakeup source */
1658 if (pdata->wolopts & WAKE_PHY)
1659 val |= PM_CTL_ED_EN_;
1660
1661 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1662 if (ret < 0)
1663 goto done;
1664
1665 /* enable receiver to enable frame reception */
1666 smsc95xx_start_rx_path(dev, 1);
1667
1668 /* some wol options are enabled, so enter SUSPEND0 */
1669 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1670 ret = smsc95xx_enter_suspend0(dev);
1671
1672 done:
1673 /*
1674 * TODO: resume() might need to handle the suspend failure
1675 * in system sleep
1676 */
1677 if (ret && PMSG_IS_AUTO(message))
1678 usbnet_resume(intf);
1679 return ret;
1680 }
1681
1682 static int smsc95xx_resume(struct usb_interface *intf)
1683 {
1684 struct usbnet *dev = usb_get_intfdata(intf);
1685 struct smsc95xx_priv *pdata;
1686 u8 suspend_flags;
1687 int ret;
1688 u32 val;
1689
1690 BUG_ON(!dev);
1691 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1692 suspend_flags = pdata->suspend_flags;
1693
1694 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1695
1696 /* do this first to ensure it's cleared even in error case */
1697 pdata->suspend_flags = 0;
1698
1699 if (suspend_flags & SUSPEND_ALLMODES) {
1700 /* clear wake-up sources */
1701 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1702 if (ret < 0)
1703 return ret;
1704
1705 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1706
1707 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1708 if (ret < 0)
1709 return ret;
1710
1711 /* clear wake-up status */
1712 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1713 if (ret < 0)
1714 return ret;
1715
1716 val &= ~PM_CTL_WOL_EN_;
1717 val |= PM_CTL_WUPS_;
1718
1719 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1720 if (ret < 0)
1721 return ret;
1722 }
1723
1724 ret = usbnet_resume(intf);
1725 if (ret < 0)
1726 netdev_warn(dev->net, "usbnet_resume error\n");
1727
1728 return ret;
1729 }
1730
1731 static int smsc95xx_reset_resume(struct usb_interface *intf)
1732 {
1733 struct usbnet *dev = usb_get_intfdata(intf);
1734 int ret;
1735
1736 ret = smsc95xx_reset(dev);
1737 if (ret < 0)
1738 return ret;
1739
1740 return smsc95xx_resume(intf);
1741 }
1742
1743 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1744 {
1745 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1746 skb->ip_summed = CHECKSUM_COMPLETE;
1747 skb_trim(skb, skb->len - 2);
1748 }
1749
1750 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1751 {
1752 /* This check is no longer done by usbnet */
1753 if (skb->len < dev->net->hard_header_len)
1754 return 0;
1755
1756 while (skb->len > 0) {
1757 u32 header, align_count;
1758 struct sk_buff *ax_skb;
1759 unsigned char *packet;
1760 u16 size;
1761
1762 memcpy(&header, skb->data, sizeof(header));
1763 le32_to_cpus(&header);
1764 skb_pull(skb, 4 + NET_IP_ALIGN);
1765 packet = skb->data;
1766
1767 /* get the packet length */
1768 size = (u16)((header & RX_STS_FL_) >> 16);
1769 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1770
1771 if (unlikely(header & RX_STS_ES_)) {
1772 netif_dbg(dev, rx_err, dev->net,
1773 "Error header=0x%08x\n", header);
1774 dev->net->stats.rx_errors++;
1775 dev->net->stats.rx_dropped++;
1776
1777 if (header & RX_STS_CRC_) {
1778 dev->net->stats.rx_crc_errors++;
1779 } else {
1780 if (header & (RX_STS_TL_ | RX_STS_RF_))
1781 dev->net->stats.rx_frame_errors++;
1782
1783 if ((header & RX_STS_LE_) &&
1784 (!(header & RX_STS_FT_)))
1785 dev->net->stats.rx_length_errors++;
1786 }
1787 } else {
1788 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1789 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1790 netif_dbg(dev, rx_err, dev->net,
1791 "size err header=0x%08x\n", header);
1792 return 0;
1793 }
1794
1795 /* last frame in this batch */
1796 if (skb->len == size) {
1797 if (dev->net->features & NETIF_F_RXCSUM)
1798 smsc95xx_rx_csum_offload(skb);
1799 skb_trim(skb, skb->len - 4); /* remove fcs */
1800 skb->truesize = size + sizeof(struct sk_buff);
1801
1802 return 1;
1803 }
1804
1805 ax_skb = skb_clone(skb, GFP_ATOMIC);
1806 if (unlikely(!ax_skb)) {
1807 netdev_warn(dev->net, "Error allocating skb\n");
1808 return 0;
1809 }
1810
1811 ax_skb->len = size;
1812 ax_skb->data = packet;
1813 skb_set_tail_pointer(ax_skb, size);
1814
1815 if (dev->net->features & NETIF_F_RXCSUM)
1816 smsc95xx_rx_csum_offload(ax_skb);
1817 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1818 ax_skb->truesize = size + sizeof(struct sk_buff);
1819
1820 usbnet_skb_return(dev, ax_skb);
1821 }
1822
1823 skb_pull(skb, size);
1824
1825 /* padding bytes before the next frame starts */
1826 if (skb->len)
1827 skb_pull(skb, align_count);
1828 }
1829
1830 return 1;
1831 }
1832
1833 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1834 {
1835 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1836 u16 high_16 = low_16 + skb->csum_offset;
1837 return (high_16 << 16) | low_16;
1838 }
1839
1840 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1841 struct sk_buff *skb, gfp_t flags)
1842 {
1843 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1844 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1845 u32 tx_cmd_a, tx_cmd_b;
1846
1847 /* We do not advertise SG, so skbs should be already linearized */
1848 BUG_ON(skb_shinfo(skb)->nr_frags);
1849
1850 if (skb_headroom(skb) < overhead) {
1851 struct sk_buff *skb2 = skb_copy_expand(skb,
1852 overhead, 0, flags);
1853 dev_kfree_skb_any(skb);
1854 skb = skb2;
1855 if (!skb)
1856 return NULL;
1857 }
1858
1859 if (csum) {
1860 if (skb->len <= 45) {
1861 /* workaround - hardware tx checksum does not work
1862 * properly with extremely small packets */
1863 long csstart = skb_checksum_start_offset(skb);
1864 __wsum calc = csum_partial(skb->data + csstart,
1865 skb->len - csstart, 0);
1866 *((__sum16 *)(skb->data + csstart
1867 + skb->csum_offset)) = csum_fold(calc);
1868
1869 csum = false;
1870 } else {
1871 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1872 skb_push(skb, 4);
1873 cpu_to_le32s(&csum_preamble);
1874 memcpy(skb->data, &csum_preamble, 4);
1875 }
1876 }
1877
1878 skb_push(skb, 4);
1879 tx_cmd_b = (u32)(skb->len - 4);
1880 if (csum)
1881 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1882 cpu_to_le32s(&tx_cmd_b);
1883 memcpy(skb->data, &tx_cmd_b, 4);
1884
1885 skb_push(skb, 4);
1886 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1887 TX_CMD_A_LAST_SEG_;
1888 cpu_to_le32s(&tx_cmd_a);
1889 memcpy(skb->data, &tx_cmd_a, 4);
1890
1891 return skb;
1892 }
1893
1894 static int smsc95xx_manage_power(struct usbnet *dev, int on)
1895 {
1896 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1897
1898 dev->intf->needs_remote_wakeup = on;
1899
1900 if (pdata->features & FEATURE_REMOTE_WAKEUP)
1901 return 0;
1902
1903 /* this chip revision isn't capable of remote wakeup */
1904 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1905
1906 if (on)
1907 usb_autopm_get_interface_no_resume(dev->intf);
1908 else
1909 usb_autopm_put_interface(dev->intf);
1910
1911 return 0;
1912 }
1913
1914 static const struct driver_info smsc95xx_info = {
1915 .description = "smsc95xx USB 2.0 Ethernet",
1916 .bind = smsc95xx_bind,
1917 .unbind = smsc95xx_unbind,
1918 .link_reset = smsc95xx_link_reset,
1919 .reset = smsc95xx_reset,
1920 .rx_fixup = smsc95xx_rx_fixup,
1921 .tx_fixup = smsc95xx_tx_fixup,
1922 .status = smsc95xx_status,
1923 .manage_power = smsc95xx_manage_power,
1924 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1925 };
1926
1927 static const struct usb_device_id products[] = {
1928 {
1929 /* SMSC9500 USB Ethernet Device */
1930 USB_DEVICE(0x0424, 0x9500),
1931 .driver_info = (unsigned long) &smsc95xx_info,
1932 },
1933 {
1934 /* SMSC9505 USB Ethernet Device */
1935 USB_DEVICE(0x0424, 0x9505),
1936 .driver_info = (unsigned long) &smsc95xx_info,
1937 },
1938 {
1939 /* SMSC9500A USB Ethernet Device */
1940 USB_DEVICE(0x0424, 0x9E00),
1941 .driver_info = (unsigned long) &smsc95xx_info,
1942 },
1943 {
1944 /* SMSC9505A USB Ethernet Device */
1945 USB_DEVICE(0x0424, 0x9E01),
1946 .driver_info = (unsigned long) &smsc95xx_info,
1947 },
1948 {
1949 /* SMSC9512/9514 USB Hub & Ethernet Device */
1950 USB_DEVICE(0x0424, 0xec00),
1951 .driver_info = (unsigned long) &smsc95xx_info,
1952 },
1953 {
1954 /* SMSC9500 USB Ethernet Device (SAL10) */
1955 USB_DEVICE(0x0424, 0x9900),
1956 .driver_info = (unsigned long) &smsc95xx_info,
1957 },
1958 {
1959 /* SMSC9505 USB Ethernet Device (SAL10) */
1960 USB_DEVICE(0x0424, 0x9901),
1961 .driver_info = (unsigned long) &smsc95xx_info,
1962 },
1963 {
1964 /* SMSC9500A USB Ethernet Device (SAL10) */
1965 USB_DEVICE(0x0424, 0x9902),
1966 .driver_info = (unsigned long) &smsc95xx_info,
1967 },
1968 {
1969 /* SMSC9505A USB Ethernet Device (SAL10) */
1970 USB_DEVICE(0x0424, 0x9903),
1971 .driver_info = (unsigned long) &smsc95xx_info,
1972 },
1973 {
1974 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1975 USB_DEVICE(0x0424, 0x9904),
1976 .driver_info = (unsigned long) &smsc95xx_info,
1977 },
1978 {
1979 /* SMSC9500A USB Ethernet Device (HAL) */
1980 USB_DEVICE(0x0424, 0x9905),
1981 .driver_info = (unsigned long) &smsc95xx_info,
1982 },
1983 {
1984 /* SMSC9505A USB Ethernet Device (HAL) */
1985 USB_DEVICE(0x0424, 0x9906),
1986 .driver_info = (unsigned long) &smsc95xx_info,
1987 },
1988 {
1989 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1990 USB_DEVICE(0x0424, 0x9907),
1991 .driver_info = (unsigned long) &smsc95xx_info,
1992 },
1993 {
1994 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1995 USB_DEVICE(0x0424, 0x9908),
1996 .driver_info = (unsigned long) &smsc95xx_info,
1997 },
1998 {
1999 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2000 USB_DEVICE(0x0424, 0x9909),
2001 .driver_info = (unsigned long) &smsc95xx_info,
2002 },
2003 {
2004 /* SMSC LAN9530 USB Ethernet Device */
2005 USB_DEVICE(0x0424, 0x9530),
2006 .driver_info = (unsigned long) &smsc95xx_info,
2007 },
2008 {
2009 /* SMSC LAN9730 USB Ethernet Device */
2010 USB_DEVICE(0x0424, 0x9730),
2011 .driver_info = (unsigned long) &smsc95xx_info,
2012 },
2013 {
2014 /* SMSC LAN89530 USB Ethernet Device */
2015 USB_DEVICE(0x0424, 0x9E08),
2016 .driver_info = (unsigned long) &smsc95xx_info,
2017 },
2018 { }, /* END */
2019 };
2020 MODULE_DEVICE_TABLE(usb, products);
2021
2022 static struct usb_driver smsc95xx_driver = {
2023 .name = "smsc95xx",
2024 .id_table = products,
2025 .probe = usbnet_probe,
2026 .suspend = smsc95xx_suspend,
2027 .resume = smsc95xx_resume,
2028 .reset_resume = smsc95xx_reset_resume,
2029 .disconnect = usbnet_disconnect,
2030 .disable_hub_initiated_lpm = 1,
2031 .supports_autosuspend = 1,
2032 };
2033
2034 module_usb_driver(smsc95xx_driver);
2035
2036 MODULE_AUTHOR("Nancy Lin");
2037 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2038 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2039 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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