?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 4.9.243
[linux/fpc-iii.git] / drivers / net / usb / smsc75xx.c
blob977d9c77255413d5c05c7e263291942b47b695df
1 /***************************************************************************
2 *
3 * Copyright (C) 2007-2010 SMSC
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 *
18 *****************************************************************************/
19
20 #include <linux/module.h>
21 #include <linux/kmod.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/mii.h>
26 #include <linux/usb.h>
27 #include <linux/bitrev.h>
28 #include <linux/crc16.h>
29 #include <linux/crc32.h>
30 #include <linux/usb/usbnet.h>
31 #include <linux/slab.h>
32 #include <linux/of_net.h>
33 #include "smsc75xx.h"
34
35 #define SMSC_CHIPNAME "smsc75xx"
36 #define SMSC_DRIVER_VERSION "1.0.0"
37 #define HS_USB_PKT_SIZE (512)
38 #define FS_USB_PKT_SIZE (64)
39 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
40 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
41 #define DEFAULT_BULK_IN_DELAY (0x00002000)
42 #define MAX_SINGLE_PACKET_SIZE (9000)
43 #define LAN75XX_EEPROM_MAGIC (0x7500)
44 #define EEPROM_MAC_OFFSET (0x01)
45 #define DEFAULT_TX_CSUM_ENABLE (true)
46 #define DEFAULT_RX_CSUM_ENABLE (true)
47 #define SMSC75XX_INTERNAL_PHY_ID (1)
48 #define SMSC75XX_TX_OVERHEAD (8)
49 #define MAX_RX_FIFO_SIZE (20 * 1024)
50 #define MAX_TX_FIFO_SIZE (12 * 1024)
51 #define USB_VENDOR_ID_SMSC (0x0424)
52 #define USB_PRODUCT_ID_LAN7500 (0x7500)
53 #define USB_PRODUCT_ID_LAN7505 (0x7505)
54 #define RXW_PADDING 2
55 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
56 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
57
58 #define SUSPEND_SUSPEND0 (0x01)
59 #define SUSPEND_SUSPEND1 (0x02)
60 #define SUSPEND_SUSPEND2 (0x04)
61 #define SUSPEND_SUSPEND3 (0x08)
62 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
63 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
64
65 struct smsc75xx_priv {
66 struct usbnet *dev;
67 u32 rfe_ctl;
68 u32 wolopts;
69 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
70 struct mutex dataport_mutex;
71 spinlock_t rfe_ctl_lock;
72 struct work_struct set_multicast;
73 u8 suspend_flags;
74 };
75
76 struct usb_context {
77 struct usb_ctrlrequest req;
78 struct usbnet *dev;
79 };
80
81 static bool turbo_mode = true;
82 module_param(turbo_mode, bool, 0644);
83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
84
85 static int smsc75xx_link_ok_nopm(struct usbnet *dev);
86 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
87
88 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
89 u32 *data, int in_pm)
90 {
91 u32 buf;
92 int ret;
93 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
94
95 BUG_ON(!dev);
96
97 if (!in_pm)
98 fn = usbnet_read_cmd;
99 else
100 fn = usbnet_read_cmd_nopm;
101
102 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
103 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
104 0, index, &buf, 4);
105 if (unlikely(ret < 0)) {
106 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
107 index, ret);
108 return ret;
109 }
110
111 le32_to_cpus(&buf);
112 *data = buf;
113
114 return ret;
115 }
116
117 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
118 u32 data, int in_pm)
119 {
120 u32 buf;
121 int ret;
122 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
123
124 BUG_ON(!dev);
125
126 if (!in_pm)
127 fn = usbnet_write_cmd;
128 else
129 fn = usbnet_write_cmd_nopm;
130
131 buf = data;
132 cpu_to_le32s(&buf);
133
134 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
135 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
136 0, index, &buf, 4);
137 if (unlikely(ret < 0))
138 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
139 index, ret);
140
141 return ret;
142 }
143
144 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
145 u32 *data)
146 {
147 return __smsc75xx_read_reg(dev, index, data, 1);
148 }
149
150 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
151 u32 data)
152 {
153 return __smsc75xx_write_reg(dev, index, data, 1);
154 }
155
156 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
157 u32 *data)
158 {
159 return __smsc75xx_read_reg(dev, index, data, 0);
160 }
161
162 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
163 u32 data)
164 {
165 return __smsc75xx_write_reg(dev, index, data, 0);
166 }
167
168 /* Loop until the read is completed with timeout
169 * called with phy_mutex held */
170 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
171 int in_pm)
172 {
173 unsigned long start_time = jiffies;
174 u32 val;
175 int ret;
176
177 do {
178 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
179 if (ret < 0) {
180 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
181 return ret;
182 }
183
184 if (!(val & MII_ACCESS_BUSY))
185 return 0;
186 } while (!time_after(jiffies, start_time + HZ));
187
188 return -EIO;
189 }
190
191 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
192 int in_pm)
193 {
194 struct usbnet *dev = netdev_priv(netdev);
195 u32 val, addr;
196 int ret;
197
198 mutex_lock(&dev->phy_mutex);
199
200 /* confirm MII not busy */
201 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
202 if (ret < 0) {
203 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
204 goto done;
205 }
206
207 /* set the address, index & direction (read from PHY) */
208 phy_id &= dev->mii.phy_id_mask;
209 idx &= dev->mii.reg_num_mask;
210 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
211 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
212 | MII_ACCESS_READ | MII_ACCESS_BUSY;
213 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
214 if (ret < 0) {
215 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
216 goto done;
217 }
218
219 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
220 if (ret < 0) {
221 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
222 goto done;
223 }
224
225 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
226 if (ret < 0) {
227 netdev_warn(dev->net, "Error reading MII_DATA\n");
228 goto done;
229 }
230
231 ret = (u16)(val & 0xFFFF);
232
233 done:
234 mutex_unlock(&dev->phy_mutex);
235 return ret;
236 }
237
238 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
239 int idx, int regval, int in_pm)
240 {
241 struct usbnet *dev = netdev_priv(netdev);
242 u32 val, addr;
243 int ret;
244
245 mutex_lock(&dev->phy_mutex);
246
247 /* confirm MII not busy */
248 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
249 if (ret < 0) {
250 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
251 goto done;
252 }
253
254 val = regval;
255 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
256 if (ret < 0) {
257 netdev_warn(dev->net, "Error writing MII_DATA\n");
258 goto done;
259 }
260
261 /* set the address, index & direction (write to PHY) */
262 phy_id &= dev->mii.phy_id_mask;
263 idx &= dev->mii.reg_num_mask;
264 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
265 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
266 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
267 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
268 if (ret < 0) {
269 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
270 goto done;
271 }
272
273 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
274 if (ret < 0) {
275 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
276 goto done;
277 }
278
279 done:
280 mutex_unlock(&dev->phy_mutex);
281 }
282
283 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
284 int idx)
285 {
286 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
287 }
288
289 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
290 int idx, int regval)
291 {
292 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
293 }
294
295 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
296 {
297 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
298 }
299
300 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
301 int regval)
302 {
303 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
304 }
305
306 static int smsc75xx_wait_eeprom(struct usbnet *dev)
307 {
308 unsigned long start_time = jiffies;
309 u32 val;
310 int ret;
311
312 do {
313 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
314 if (ret < 0) {
315 netdev_warn(dev->net, "Error reading E2P_CMD\n");
316 return ret;
317 }
318
319 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
320 break;
321 udelay(40);
322 } while (!time_after(jiffies, start_time + HZ));
323
324 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
325 netdev_warn(dev->net, "EEPROM read operation timeout\n");
326 return -EIO;
327 }
328
329 return 0;
330 }
331
332 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
333 {
334 unsigned long start_time = jiffies;
335 u32 val;
336 int ret;
337
338 do {
339 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
340 if (ret < 0) {
341 netdev_warn(dev->net, "Error reading E2P_CMD\n");
342 return ret;
343 }
344
345 if (!(val & E2P_CMD_BUSY))
346 return 0;
347
348 udelay(40);
349 } while (!time_after(jiffies, start_time + HZ));
350
351 netdev_warn(dev->net, "EEPROM is busy\n");
352 return -EIO;
353 }
354
355 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
356 u8 *data)
357 {
358 u32 val;
359 int i, ret;
360
361 BUG_ON(!dev);
362 BUG_ON(!data);
363
364 ret = smsc75xx_eeprom_confirm_not_busy(dev);
365 if (ret)
366 return ret;
367
368 for (i = 0; i < length; i++) {
369 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
370 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
371 if (ret < 0) {
372 netdev_warn(dev->net, "Error writing E2P_CMD\n");
373 return ret;
374 }
375
376 ret = smsc75xx_wait_eeprom(dev);
377 if (ret < 0)
378 return ret;
379
380 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
381 if (ret < 0) {
382 netdev_warn(dev->net, "Error reading E2P_DATA\n");
383 return ret;
384 }
385
386 data[i] = val & 0xFF;
387 offset++;
388 }
389
390 return 0;
391 }
392
393 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
394 u8 *data)
395 {
396 u32 val;
397 int i, ret;
398
399 BUG_ON(!dev);
400 BUG_ON(!data);
401
402 ret = smsc75xx_eeprom_confirm_not_busy(dev);
403 if (ret)
404 return ret;
405
406 /* Issue write/erase enable command */
407 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
408 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
409 if (ret < 0) {
410 netdev_warn(dev->net, "Error writing E2P_CMD\n");
411 return ret;
412 }
413
414 ret = smsc75xx_wait_eeprom(dev);
415 if (ret < 0)
416 return ret;
417
418 for (i = 0; i < length; i++) {
419
420 /* Fill data register */
421 val = data[i];
422 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
423 if (ret < 0) {
424 netdev_warn(dev->net, "Error writing E2P_DATA\n");
425 return ret;
426 }
427
428 /* Send "write" command */
429 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
430 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
431 if (ret < 0) {
432 netdev_warn(dev->net, "Error writing E2P_CMD\n");
433 return ret;
434 }
435
436 ret = smsc75xx_wait_eeprom(dev);
437 if (ret < 0)
438 return ret;
439
440 offset++;
441 }
442
443 return 0;
444 }
445
446 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
447 {
448 int i, ret;
449
450 for (i = 0; i < 100; i++) {
451 u32 dp_sel;
452 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
453 if (ret < 0) {
454 netdev_warn(dev->net, "Error reading DP_SEL\n");
455 return ret;
456 }
457
458 if (dp_sel & DP_SEL_DPRDY)
459 return 0;
460
461 udelay(40);
462 }
463
464 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
465
466 return -EIO;
467 }
468
469 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
470 u32 length, u32 *buf)
471 {
472 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
473 u32 dp_sel;
474 int i, ret;
475
476 mutex_lock(&pdata->dataport_mutex);
477
478 ret = smsc75xx_dataport_wait_not_busy(dev);
479 if (ret < 0) {
480 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
481 goto done;
482 }
483
484 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
485 if (ret < 0) {
486 netdev_warn(dev->net, "Error reading DP_SEL\n");
487 goto done;
488 }
489
490 dp_sel &= ~DP_SEL_RSEL;
491 dp_sel |= ram_select;
492 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
493 if (ret < 0) {
494 netdev_warn(dev->net, "Error writing DP_SEL\n");
495 goto done;
496 }
497
498 for (i = 0; i < length; i++) {
499 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
500 if (ret < 0) {
501 netdev_warn(dev->net, "Error writing DP_ADDR\n");
502 goto done;
503 }
504
505 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
506 if (ret < 0) {
507 netdev_warn(dev->net, "Error writing DP_DATA\n");
508 goto done;
509 }
510
511 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
512 if (ret < 0) {
513 netdev_warn(dev->net, "Error writing DP_CMD\n");
514 goto done;
515 }
516
517 ret = smsc75xx_dataport_wait_not_busy(dev);
518 if (ret < 0) {
519 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
520 goto done;
521 }
522 }
523
524 done:
525 mutex_unlock(&pdata->dataport_mutex);
526 return ret;
527 }
528
529 /* returns hash bit number for given MAC address */
530 static u32 smsc75xx_hash(char addr[ETH_ALEN])
531 {
532 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
533 }
534
535 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
536 {
537 struct smsc75xx_priv *pdata =
538 container_of(param, struct smsc75xx_priv, set_multicast);
539 struct usbnet *dev = pdata->dev;
540 int ret;
541
542 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
543 pdata->rfe_ctl);
544
545 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
546 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
547
548 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
549 if (ret < 0)
550 netdev_warn(dev->net, "Error writing RFE_CRL\n");
551 }
552
553 static void smsc75xx_set_multicast(struct net_device *netdev)
554 {
555 struct usbnet *dev = netdev_priv(netdev);
556 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
557 unsigned long flags;
558 int i;
559
560 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
561
562 pdata->rfe_ctl &=
563 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
564 pdata->rfe_ctl |= RFE_CTL_AB;
565
566 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
567 pdata->multicast_hash_table[i] = 0;
568
569 if (dev->net->flags & IFF_PROMISC) {
570 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
571 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
572 } else if (dev->net->flags & IFF_ALLMULTI) {
573 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
574 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
575 } else if (!netdev_mc_empty(dev->net)) {
576 struct netdev_hw_addr *ha;
577
578 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
579
580 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
581
582 netdev_for_each_mc_addr(ha, netdev) {
583 u32 bitnum = smsc75xx_hash(ha->addr);
584 pdata->multicast_hash_table[bitnum / 32] |=
585 (1 << (bitnum % 32));
586 }
587 } else {
588 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
589 pdata->rfe_ctl |= RFE_CTL_DPF;
590 }
591
592 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
593
594 /* defer register writes to a sleepable context */
595 schedule_work(&pdata->set_multicast);
596 }
597
598 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
599 u16 lcladv, u16 rmtadv)
600 {
601 u32 flow = 0, fct_flow = 0;
602 int ret;
603
604 if (duplex == DUPLEX_FULL) {
605 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
606
607 if (cap & FLOW_CTRL_TX) {
608 flow = (FLOW_TX_FCEN | 0xFFFF);
609 /* set fct_flow thresholds to 20% and 80% */
610 fct_flow = (8 << 8) | 32;
611 }
612
613 if (cap & FLOW_CTRL_RX)
614 flow |= FLOW_RX_FCEN;
615
616 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
617 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
618 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
619 } else {
620 netif_dbg(dev, link, dev->net, "half duplex\n");
621 }
622
623 ret = smsc75xx_write_reg(dev, FLOW, flow);
624 if (ret < 0) {
625 netdev_warn(dev->net, "Error writing FLOW\n");
626 return ret;
627 }
628
629 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
630 if (ret < 0) {
631 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
632 return ret;
633 }
634
635 return 0;
636 }
637
638 static int smsc75xx_link_reset(struct usbnet *dev)
639 {
640 struct mii_if_info *mii = &dev->mii;
641 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
642 u16 lcladv, rmtadv;
643 int ret;
644
645 /* write to clear phy interrupt status */
646 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
647 PHY_INT_SRC_CLEAR_ALL);
648
649 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
650 if (ret < 0) {
651 netdev_warn(dev->net, "Error writing INT_STS\n");
652 return ret;
653 }
654
655 mii_check_media(mii, 1, 1);
656 mii_ethtool_gset(&dev->mii, &ecmd);
657 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
658 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
659
660 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
661 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
662
663 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
664 }
665
666 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
667 {
668 u32 intdata;
669
670 if (urb->actual_length != 4) {
671 netdev_warn(dev->net, "unexpected urb length %d\n",
672 urb->actual_length);
673 return;
674 }
675
676 memcpy(&intdata, urb->transfer_buffer, 4);
677 le32_to_cpus(&intdata);
678
679 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
680
681 if (intdata & INT_ENP_PHY_INT)
682 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
683 else
684 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
685 intdata);
686 }
687
688 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
689 {
690 return MAX_EEPROM_SIZE;
691 }
692
693 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
694 struct ethtool_eeprom *ee, u8 *data)
695 {
696 struct usbnet *dev = netdev_priv(netdev);
697
698 ee->magic = LAN75XX_EEPROM_MAGIC;
699
700 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
701 }
702
703 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
704 struct ethtool_eeprom *ee, u8 *data)
705 {
706 struct usbnet *dev = netdev_priv(netdev);
707
708 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
709 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
710 ee->magic);
711 return -EINVAL;
712 }
713
714 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
715 }
716
717 static void smsc75xx_ethtool_get_wol(struct net_device *net,
718 struct ethtool_wolinfo *wolinfo)
719 {
720 struct usbnet *dev = netdev_priv(net);
721 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
722
723 wolinfo->supported = SUPPORTED_WAKE;
724 wolinfo->wolopts = pdata->wolopts;
725 }
726
727 static int smsc75xx_ethtool_set_wol(struct net_device *net,
728 struct ethtool_wolinfo *wolinfo)
729 {
730 struct usbnet *dev = netdev_priv(net);
731 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
732 int ret;
733
734 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
735 return -EINVAL;
736
737 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
738
739 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
740 if (ret < 0)
741 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
742
743 return ret;
744 }
745
746 static const struct ethtool_ops smsc75xx_ethtool_ops = {
747 .get_link = usbnet_get_link,
748 .nway_reset = usbnet_nway_reset,
749 .get_drvinfo = usbnet_get_drvinfo,
750 .get_msglevel = usbnet_get_msglevel,
751 .set_msglevel = usbnet_set_msglevel,
752 .get_settings = usbnet_get_settings,
753 .set_settings = usbnet_set_settings,
754 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
755 .get_eeprom = smsc75xx_ethtool_get_eeprom,
756 .set_eeprom = smsc75xx_ethtool_set_eeprom,
757 .get_wol = smsc75xx_ethtool_get_wol,
758 .set_wol = smsc75xx_ethtool_set_wol,
759 };
760
761 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
762 {
763 struct usbnet *dev = netdev_priv(netdev);
764
765 if (!netif_running(netdev))
766 return -EINVAL;
767
768 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
769 }
770
771 static void smsc75xx_init_mac_address(struct usbnet *dev)
772 {
773 const u8 *mac_addr;
774
775 /* maybe the boot loader passed the MAC address in devicetree */
776 mac_addr = of_get_mac_address(dev->udev->dev.of_node);
777 if (mac_addr) {
778 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
779 return;
780 }
781
782 /* try reading mac address from EEPROM */
783 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
784 dev->net->dev_addr) == 0) {
785 if (is_valid_ether_addr(dev->net->dev_addr)) {
786 /* eeprom values are valid so use them */
787 netif_dbg(dev, ifup, dev->net,
788 "MAC address read from EEPROM\n");
789 return;
790 }
791 }
792
793 /* no useful static MAC address found. generate a random one */
794 eth_hw_addr_random(dev->net);
795 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
796 }
797
798 static int smsc75xx_set_mac_address(struct usbnet *dev)
799 {
800 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
801 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
802 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
803
804 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
805 if (ret < 0) {
806 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
807 return ret;
808 }
809
810 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
811 if (ret < 0) {
812 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
813 return ret;
814 }
815
816 addr_hi |= ADDR_FILTX_FB_VALID;
817 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
818 if (ret < 0) {
819 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
820 return ret;
821 }
822
823 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
824 if (ret < 0)
825 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
826
827 return ret;
828 }
829
830 static int smsc75xx_phy_initialize(struct usbnet *dev)
831 {
832 int bmcr, ret, timeout = 0;
833
834 /* Initialize MII structure */
835 dev->mii.dev = dev->net;
836 dev->mii.mdio_read = smsc75xx_mdio_read;
837 dev->mii.mdio_write = smsc75xx_mdio_write;
838 dev->mii.phy_id_mask = 0x1f;
839 dev->mii.reg_num_mask = 0x1f;
840 dev->mii.supports_gmii = 1;
841 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
842
843 /* reset phy and wait for reset to complete */
844 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
845
846 do {
847 msleep(10);
848 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
849 if (bmcr < 0) {
850 netdev_warn(dev->net, "Error reading MII_BMCR\n");
851 return bmcr;
852 }
853 timeout++;
854 } while ((bmcr & BMCR_RESET) && (timeout < 100));
855
856 if (timeout >= 100) {
857 netdev_warn(dev->net, "timeout on PHY Reset\n");
858 return -EIO;
859 }
860
861 /* phy workaround for gig link */
862 smsc75xx_phy_gig_workaround(dev);
863
864 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
865 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
866 ADVERTISE_PAUSE_ASYM);
867 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
868 ADVERTISE_1000FULL);
869
870 /* read and write to clear phy interrupt status */
871 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
872 if (ret < 0) {
873 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
874 return ret;
875 }
876
877 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
878
879 smsc75xx_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 smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
888 {
889 int ret = 0;
890 u32 buf;
891 bool rxenabled;
892
893 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
894 if (ret < 0) {
895 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
896 return ret;
897 }
898
899 rxenabled = ((buf & MAC_RX_RXEN) != 0);
900
901 if (rxenabled) {
902 buf &= ~MAC_RX_RXEN;
903 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
904 if (ret < 0) {
905 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
906 return ret;
907 }
908 }
909
910 /* add 4 to size for FCS */
911 buf &= ~MAC_RX_MAX_SIZE;
912 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
913
914 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
915 if (ret < 0) {
916 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
917 return ret;
918 }
919
920 if (rxenabled) {
921 buf |= MAC_RX_RXEN;
922 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
923 if (ret < 0) {
924 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
925 return ret;
926 }
927 }
928
929 return 0;
930 }
931
932 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
933 {
934 struct usbnet *dev = netdev_priv(netdev);
935 int ret;
936
937 if (new_mtu > MAX_SINGLE_PACKET_SIZE)
938 return -EINVAL;
939
940 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
941 if (ret < 0) {
942 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
943 return ret;
944 }
945
946 return usbnet_change_mtu(netdev, new_mtu);
947 }
948
949 /* Enable or disable Rx checksum offload engine */
950 static int smsc75xx_set_features(struct net_device *netdev,
951 netdev_features_t features)
952 {
953 struct usbnet *dev = netdev_priv(netdev);
954 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
955 unsigned long flags;
956 int ret;
957
958 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
959
960 if (features & NETIF_F_RXCSUM)
961 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
962 else
963 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
964
965 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
966 /* it's racing here! */
967
968 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
969 if (ret < 0) {
970 netdev_warn(dev->net, "Error writing RFE_CTL\n");
971 return ret;
972 }
973 return 0;
974 }
975
976 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
977 {
978 int timeout = 0;
979
980 do {
981 u32 buf;
982 int ret;
983
984 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
985
986 if (ret < 0) {
987 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
988 return ret;
989 }
990
991 if (buf & PMT_CTL_DEV_RDY)
992 return 0;
993
994 msleep(10);
995 timeout++;
996 } while (timeout < 100);
997
998 netdev_warn(dev->net, "timeout waiting for device ready\n");
999 return -EIO;
1000 }
1001
1002 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
1003 {
1004 struct mii_if_info *mii = &dev->mii;
1005 int ret = 0, timeout = 0;
1006 u32 buf, link_up = 0;
1007
1008 /* Set the phy in Gig loopback */
1009 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
1010
1011 /* Wait for the link up */
1012 do {
1013 link_up = smsc75xx_link_ok_nopm(dev);
1014 usleep_range(10000, 20000);
1015 timeout++;
1016 } while ((!link_up) && (timeout < 1000));
1017
1018 if (timeout >= 1000) {
1019 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1020 return -EIO;
1021 }
1022
1023 /* phy reset */
1024 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1025 if (ret < 0) {
1026 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1027 return ret;
1028 }
1029
1030 buf |= PMT_CTL_PHY_RST;
1031
1032 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1033 if (ret < 0) {
1034 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1035 return ret;
1036 }
1037
1038 timeout = 0;
1039 do {
1040 usleep_range(10000, 20000);
1041 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1042 if (ret < 0) {
1043 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1044 ret);
1045 return ret;
1046 }
1047 timeout++;
1048 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1049
1050 if (timeout >= 100) {
1051 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1052 return -EIO;
1053 }
1054
1055 return 0;
1056 }
1057
1058 static int smsc75xx_reset(struct usbnet *dev)
1059 {
1060 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1061 u32 buf;
1062 int ret = 0, timeout;
1063
1064 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1065
1066 ret = smsc75xx_wait_ready(dev, 0);
1067 if (ret < 0) {
1068 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1069 return ret;
1070 }
1071
1072 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1073 if (ret < 0) {
1074 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1075 return ret;
1076 }
1077
1078 buf |= HW_CFG_LRST;
1079
1080 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1081 if (ret < 0) {
1082 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1083 return ret;
1084 }
1085
1086 timeout = 0;
1087 do {
1088 msleep(10);
1089 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1090 if (ret < 0) {
1091 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1092 return ret;
1093 }
1094 timeout++;
1095 } while ((buf & HW_CFG_LRST) && (timeout < 100));
1096
1097 if (timeout >= 100) {
1098 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1099 return -EIO;
1100 }
1101
1102 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1103
1104 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1105 if (ret < 0) {
1106 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1107 return ret;
1108 }
1109
1110 buf |= PMT_CTL_PHY_RST;
1111
1112 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1113 if (ret < 0) {
1114 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1115 return ret;
1116 }
1117
1118 timeout = 0;
1119 do {
1120 msleep(10);
1121 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1122 if (ret < 0) {
1123 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1124 return ret;
1125 }
1126 timeout++;
1127 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1128
1129 if (timeout >= 100) {
1130 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1131 return -EIO;
1132 }
1133
1134 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1135
1136 ret = smsc75xx_set_mac_address(dev);
1137 if (ret < 0) {
1138 netdev_warn(dev->net, "Failed to set mac address\n");
1139 return ret;
1140 }
1141
1142 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1143 dev->net->dev_addr);
1144
1145 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1146 if (ret < 0) {
1147 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1148 return ret;
1149 }
1150
1151 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1152 buf);
1153
1154 buf |= HW_CFG_BIR;
1155
1156 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1157 if (ret < 0) {
1158 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1159 return ret;
1160 }
1161
1162 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1163 if (ret < 0) {
1164 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1165 return ret;
1166 }
1167
1168 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1169 buf);
1170
1171 if (!turbo_mode) {
1172 buf = 0;
1173 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1174 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1175 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1176 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1177 } else {
1178 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1179 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1180 }
1181
1182 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1183 (ulong)dev->rx_urb_size);
1184
1185 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1186 if (ret < 0) {
1187 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1188 return ret;
1189 }
1190
1191 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1192 if (ret < 0) {
1193 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1194 return ret;
1195 }
1196
1197 netif_dbg(dev, ifup, dev->net,
1198 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1199
1200 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1201 if (ret < 0) {
1202 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1203 return ret;
1204 }
1205
1206 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1207 if (ret < 0) {
1208 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1209 return ret;
1210 }
1211
1212 netif_dbg(dev, ifup, dev->net,
1213 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1214
1215 if (turbo_mode) {
1216 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1217 if (ret < 0) {
1218 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1219 return ret;
1220 }
1221
1222 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1223
1224 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1225
1226 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1227 if (ret < 0) {
1228 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1229 return ret;
1230 }
1231
1232 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1233 if (ret < 0) {
1234 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1235 return ret;
1236 }
1237
1238 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1239 }
1240
1241 /* set FIFO sizes */
1242 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1243 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1244 if (ret < 0) {
1245 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1246 return ret;
1247 }
1248
1249 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1250
1251 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1252 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1253 if (ret < 0) {
1254 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1255 return ret;
1256 }
1257
1258 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1259
1260 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1261 if (ret < 0) {
1262 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1263 return ret;
1264 }
1265
1266 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1267 if (ret < 0) {
1268 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1269 return ret;
1270 }
1271
1272 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1273
1274 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1275 if (ret < 0) {
1276 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1277 return ret;
1278 }
1279
1280 /* only set default GPIO/LED settings if no EEPROM is detected */
1281 if (!(buf & E2P_CMD_LOADED)) {
1282 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1283 if (ret < 0) {
1284 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1285 return ret;
1286 }
1287
1288 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1289 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1290
1291 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1292 if (ret < 0) {
1293 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1294 return ret;
1295 }
1296 }
1297
1298 ret = smsc75xx_write_reg(dev, FLOW, 0);
1299 if (ret < 0) {
1300 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1301 return ret;
1302 }
1303
1304 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1305 if (ret < 0) {
1306 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1307 return ret;
1308 }
1309
1310 /* Don't need rfe_ctl_lock during initialisation */
1311 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1312 if (ret < 0) {
1313 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1314 return ret;
1315 }
1316
1317 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1318
1319 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1320 if (ret < 0) {
1321 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1322 return ret;
1323 }
1324
1325 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1326 if (ret < 0) {
1327 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1328 return ret;
1329 }
1330
1331 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1332 pdata->rfe_ctl);
1333
1334 /* Enable or disable checksum offload engines */
1335 smsc75xx_set_features(dev->net, dev->net->features);
1336
1337 smsc75xx_set_multicast(dev->net);
1338
1339 ret = smsc75xx_phy_initialize(dev);
1340 if (ret < 0) {
1341 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1342 return ret;
1343 }
1344
1345 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1346 if (ret < 0) {
1347 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1348 return ret;
1349 }
1350
1351 /* enable PHY interrupts */
1352 buf |= INT_ENP_PHY_INT;
1353
1354 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1355 if (ret < 0) {
1356 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1357 return ret;
1358 }
1359
1360 /* allow mac to detect speed and duplex from phy */
1361 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1362 if (ret < 0) {
1363 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1364 return ret;
1365 }
1366
1367 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1368 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1369 if (ret < 0) {
1370 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1371 return ret;
1372 }
1373
1374 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1375 if (ret < 0) {
1376 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1377 return ret;
1378 }
1379
1380 buf |= MAC_TX_TXEN;
1381
1382 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1383 if (ret < 0) {
1384 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1385 return ret;
1386 }
1387
1388 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1389
1390 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1391 if (ret < 0) {
1392 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1393 return ret;
1394 }
1395
1396 buf |= FCT_TX_CTL_EN;
1397
1398 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1399 if (ret < 0) {
1400 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1401 return ret;
1402 }
1403
1404 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1405
1406 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1407 if (ret < 0) {
1408 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1409 return ret;
1410 }
1411
1412 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1413 if (ret < 0) {
1414 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1415 return ret;
1416 }
1417
1418 buf |= MAC_RX_RXEN;
1419
1420 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1421 if (ret < 0) {
1422 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1423 return ret;
1424 }
1425
1426 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1427
1428 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1429 if (ret < 0) {
1430 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1431 return ret;
1432 }
1433
1434 buf |= FCT_RX_CTL_EN;
1435
1436 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1437 if (ret < 0) {
1438 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1439 return ret;
1440 }
1441
1442 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1443
1444 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1445 return 0;
1446 }
1447
1448 static const struct net_device_ops smsc75xx_netdev_ops = {
1449 .ndo_open = usbnet_open,
1450 .ndo_stop = usbnet_stop,
1451 .ndo_start_xmit = usbnet_start_xmit,
1452 .ndo_tx_timeout = usbnet_tx_timeout,
1453 .ndo_change_mtu = smsc75xx_change_mtu,
1454 .ndo_set_mac_address = eth_mac_addr,
1455 .ndo_validate_addr = eth_validate_addr,
1456 .ndo_do_ioctl = smsc75xx_ioctl,
1457 .ndo_set_rx_mode = smsc75xx_set_multicast,
1458 .ndo_set_features = smsc75xx_set_features,
1459 };
1460
1461 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1462 {
1463 struct smsc75xx_priv *pdata = NULL;
1464 int ret;
1465
1466 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1467
1468 ret = usbnet_get_endpoints(dev, intf);
1469 if (ret < 0) {
1470 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1471 return ret;
1472 }
1473
1474 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1475 GFP_KERNEL);
1476
1477 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1478 if (!pdata)
1479 return -ENOMEM;
1480
1481 pdata->dev = dev;
1482
1483 spin_lock_init(&pdata->rfe_ctl_lock);
1484 mutex_init(&pdata->dataport_mutex);
1485
1486 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1487
1488 if (DEFAULT_TX_CSUM_ENABLE)
1489 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1490
1491 if (DEFAULT_RX_CSUM_ENABLE)
1492 dev->net->features |= NETIF_F_RXCSUM;
1493
1494 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1495 NETIF_F_RXCSUM;
1496
1497 ret = smsc75xx_wait_ready(dev, 0);
1498 if (ret < 0) {
1499 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1500 return ret;
1501 }
1502
1503 smsc75xx_init_mac_address(dev);
1504
1505 /* Init all registers */
1506 ret = smsc75xx_reset(dev);
1507 if (ret < 0) {
1508 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1509 return ret;
1510 }
1511
1512 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1513 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1514 dev->net->flags |= IFF_MULTICAST;
1515 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1516 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1517 return 0;
1518 }
1519
1520 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1521 {
1522 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1523 if (pdata) {
1524 cancel_work_sync(&pdata->set_multicast);
1525 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1526 kfree(pdata);
1527 pdata = NULL;
1528 dev->data[0] = 0;
1529 }
1530 }
1531
1532 static u16 smsc_crc(const u8 *buffer, size_t len)
1533 {
1534 return bitrev16(crc16(0xFFFF, buffer, len));
1535 }
1536
1537 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1538 u32 wuf_mask1)
1539 {
1540 int cfg_base = WUF_CFGX + filter * 4;
1541 int mask_base = WUF_MASKX + filter * 16;
1542 int ret;
1543
1544 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1545 if (ret < 0) {
1546 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1547 return ret;
1548 }
1549
1550 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1551 if (ret < 0) {
1552 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1553 return ret;
1554 }
1555
1556 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1557 if (ret < 0) {
1558 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1559 return ret;
1560 }
1561
1562 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1563 if (ret < 0) {
1564 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1565 return ret;
1566 }
1567
1568 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1569 if (ret < 0) {
1570 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1571 return ret;
1572 }
1573
1574 return 0;
1575 }
1576
1577 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1578 {
1579 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1580 u32 val;
1581 int ret;
1582
1583 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1584 if (ret < 0) {
1585 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1586 return ret;
1587 }
1588
1589 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1590 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1591
1592 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1593 if (ret < 0) {
1594 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1595 return ret;
1596 }
1597
1598 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1599
1600 return 0;
1601 }
1602
1603 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1604 {
1605 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1606 u32 val;
1607 int ret;
1608
1609 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1610 if (ret < 0) {
1611 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1612 return ret;
1613 }
1614
1615 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1616 val |= PMT_CTL_SUS_MODE_1;
1617
1618 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1619 if (ret < 0) {
1620 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1621 return ret;
1622 }
1623
1624 /* clear wol status, enable energy detection */
1625 val &= ~PMT_CTL_WUPS;
1626 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1627
1628 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1629 if (ret < 0) {
1630 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1631 return ret;
1632 }
1633
1634 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1635
1636 return 0;
1637 }
1638
1639 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1640 {
1641 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1642 u32 val;
1643 int ret;
1644
1645 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1646 if (ret < 0) {
1647 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1648 return ret;
1649 }
1650
1651 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1652 val |= PMT_CTL_SUS_MODE_2;
1653
1654 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1655 if (ret < 0) {
1656 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1657 return ret;
1658 }
1659
1660 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1661
1662 return 0;
1663 }
1664
1665 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1666 {
1667 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1668 u32 val;
1669 int ret;
1670
1671 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1672 if (ret < 0) {
1673 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1674 return ret;
1675 }
1676
1677 if (val & FCT_RX_CTL_RXUSED) {
1678 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1679 return -EBUSY;
1680 }
1681
1682 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1683 if (ret < 0) {
1684 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1685 return ret;
1686 }
1687
1688 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1689 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1690
1691 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1692 if (ret < 0) {
1693 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1694 return ret;
1695 }
1696
1697 /* clear wol status */
1698 val &= ~PMT_CTL_WUPS;
1699 val |= PMT_CTL_WUPS_WOL;
1700
1701 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1702 if (ret < 0) {
1703 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1704 return ret;
1705 }
1706
1707 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1708
1709 return 0;
1710 }
1711
1712 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1713 {
1714 struct mii_if_info *mii = &dev->mii;
1715 int ret;
1716
1717 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1718
1719 /* read to clear */
1720 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1721 if (ret < 0) {
1722 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1723 return ret;
1724 }
1725
1726 /* enable interrupt source */
1727 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1728 if (ret < 0) {
1729 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1730 return ret;
1731 }
1732
1733 ret |= mask;
1734
1735 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1736
1737 return 0;
1738 }
1739
1740 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1741 {
1742 struct mii_if_info *mii = &dev->mii;
1743 int ret;
1744
1745 /* first, a dummy read, needed to latch some MII phys */
1746 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1747 if (ret < 0) {
1748 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1749 return ret;
1750 }
1751
1752 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1753 if (ret < 0) {
1754 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1755 return ret;
1756 }
1757
1758 return !!(ret & BMSR_LSTATUS);
1759 }
1760
1761 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1762 {
1763 int ret;
1764
1765 if (!netif_running(dev->net)) {
1766 /* interface is ifconfig down so fully power down hw */
1767 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1768 return smsc75xx_enter_suspend2(dev);
1769 }
1770
1771 if (!link_up) {
1772 /* link is down so enter EDPD mode */
1773 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1774
1775 /* enable PHY wakeup events for if cable is attached */
1776 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1777 PHY_INT_MASK_ANEG_COMP);
1778 if (ret < 0) {
1779 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1780 return ret;
1781 }
1782
1783 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1784 return smsc75xx_enter_suspend1(dev);
1785 }
1786
1787 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1788 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1789 PHY_INT_MASK_LINK_DOWN);
1790 if (ret < 0) {
1791 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1792 return ret;
1793 }
1794
1795 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1796 return smsc75xx_enter_suspend3(dev);
1797 }
1798
1799 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1800 {
1801 struct usbnet *dev = usb_get_intfdata(intf);
1802 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1803 u32 val, link_up;
1804 int ret;
1805
1806 ret = usbnet_suspend(intf, message);
1807 if (ret < 0) {
1808 netdev_warn(dev->net, "usbnet_suspend error\n");
1809 return ret;
1810 }
1811
1812 if (pdata->suspend_flags) {
1813 netdev_warn(dev->net, "error during last resume\n");
1814 pdata->suspend_flags = 0;
1815 }
1816
1817 /* determine if link is up using only _nopm functions */
1818 link_up = smsc75xx_link_ok_nopm(dev);
1819
1820 if (message.event == PM_EVENT_AUTO_SUSPEND) {
1821 ret = smsc75xx_autosuspend(dev, link_up);
1822 goto done;
1823 }
1824
1825 /* if we get this far we're not autosuspending */
1826 /* if no wol options set, or if link is down and we're not waking on
1827 * PHY activity, enter lowest power SUSPEND2 mode
1828 */
1829 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1830 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1831 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1832
1833 /* disable energy detect (link up) & wake up events */
1834 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1835 if (ret < 0) {
1836 netdev_warn(dev->net, "Error reading WUCSR\n");
1837 goto done;
1838 }
1839
1840 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1841
1842 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1843 if (ret < 0) {
1844 netdev_warn(dev->net, "Error writing WUCSR\n");
1845 goto done;
1846 }
1847
1848 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1849 if (ret < 0) {
1850 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1851 goto done;
1852 }
1853
1854 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1855
1856 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1857 if (ret < 0) {
1858 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1859 goto done;
1860 }
1861
1862 ret = smsc75xx_enter_suspend2(dev);
1863 goto done;
1864 }
1865
1866 if (pdata->wolopts & WAKE_PHY) {
1867 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1868 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1869 if (ret < 0) {
1870 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1871 goto done;
1872 }
1873
1874 /* if link is down then configure EDPD and enter SUSPEND1,
1875 * otherwise enter SUSPEND0 below
1876 */
1877 if (!link_up) {
1878 struct mii_if_info *mii = &dev->mii;
1879 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1880
1881 /* enable energy detect power-down mode */
1882 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1883 PHY_MODE_CTRL_STS);
1884 if (ret < 0) {
1885 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1886 goto done;
1887 }
1888
1889 ret |= MODE_CTRL_STS_EDPWRDOWN;
1890
1891 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1892 PHY_MODE_CTRL_STS, ret);
1893
1894 /* enter SUSPEND1 mode */
1895 ret = smsc75xx_enter_suspend1(dev);
1896 goto done;
1897 }
1898 }
1899
1900 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1901 int i, filter = 0;
1902
1903 /* disable all filters */
1904 for (i = 0; i < WUF_NUM; i++) {
1905 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1906 if (ret < 0) {
1907 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1908 goto done;
1909 }
1910 }
1911
1912 if (pdata->wolopts & WAKE_MCAST) {
1913 const u8 mcast[] = {0x01, 0x00, 0x5E};
1914 netdev_info(dev->net, "enabling multicast detection\n");
1915
1916 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1917 | smsc_crc(mcast, 3);
1918 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1919 if (ret < 0) {
1920 netdev_warn(dev->net, "Error writing wakeup filter\n");
1921 goto done;
1922 }
1923 }
1924
1925 if (pdata->wolopts & WAKE_ARP) {
1926 const u8 arp[] = {0x08, 0x06};
1927 netdev_info(dev->net, "enabling ARP detection\n");
1928
1929 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1930 | smsc_crc(arp, 2);
1931 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1932 if (ret < 0) {
1933 netdev_warn(dev->net, "Error writing wakeup filter\n");
1934 goto done;
1935 }
1936 }
1937
1938 /* clear any pending pattern match packet status */
1939 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1940 if (ret < 0) {
1941 netdev_warn(dev->net, "Error reading WUCSR\n");
1942 goto done;
1943 }
1944
1945 val |= WUCSR_WUFR;
1946
1947 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1948 if (ret < 0) {
1949 netdev_warn(dev->net, "Error writing WUCSR\n");
1950 goto done;
1951 }
1952
1953 netdev_info(dev->net, "enabling packet match detection\n");
1954 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1955 if (ret < 0) {
1956 netdev_warn(dev->net, "Error reading WUCSR\n");
1957 goto done;
1958 }
1959
1960 val |= WUCSR_WUEN;
1961
1962 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1963 if (ret < 0) {
1964 netdev_warn(dev->net, "Error writing WUCSR\n");
1965 goto done;
1966 }
1967 } else {
1968 netdev_info(dev->net, "disabling packet match detection\n");
1969 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1970 if (ret < 0) {
1971 netdev_warn(dev->net, "Error reading WUCSR\n");
1972 goto done;
1973 }
1974
1975 val &= ~WUCSR_WUEN;
1976
1977 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1978 if (ret < 0) {
1979 netdev_warn(dev->net, "Error writing WUCSR\n");
1980 goto done;
1981 }
1982 }
1983
1984 /* disable magic, bcast & unicast wakeup sources */
1985 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1986 if (ret < 0) {
1987 netdev_warn(dev->net, "Error reading WUCSR\n");
1988 goto done;
1989 }
1990
1991 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1992
1993 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1994 if (ret < 0) {
1995 netdev_warn(dev->net, "Error writing WUCSR\n");
1996 goto done;
1997 }
1998
1999 if (pdata->wolopts & WAKE_PHY) {
2000 netdev_info(dev->net, "enabling PHY wakeup\n");
2001
2002 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2003 if (ret < 0) {
2004 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2005 goto done;
2006 }
2007
2008 /* clear wol status, enable energy detection */
2009 val &= ~PMT_CTL_WUPS;
2010 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2011
2012 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2013 if (ret < 0) {
2014 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2015 goto done;
2016 }
2017 }
2018
2019 if (pdata->wolopts & WAKE_MAGIC) {
2020 netdev_info(dev->net, "enabling magic packet wakeup\n");
2021 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2022 if (ret < 0) {
2023 netdev_warn(dev->net, "Error reading WUCSR\n");
2024 goto done;
2025 }
2026
2027 /* clear any pending magic packet status */
2028 val |= WUCSR_MPR | WUCSR_MPEN;
2029
2030 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2031 if (ret < 0) {
2032 netdev_warn(dev->net, "Error writing WUCSR\n");
2033 goto done;
2034 }
2035 }
2036
2037 if (pdata->wolopts & WAKE_BCAST) {
2038 netdev_info(dev->net, "enabling broadcast detection\n");
2039 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2040 if (ret < 0) {
2041 netdev_warn(dev->net, "Error reading WUCSR\n");
2042 goto done;
2043 }
2044
2045 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2046
2047 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2048 if (ret < 0) {
2049 netdev_warn(dev->net, "Error writing WUCSR\n");
2050 goto done;
2051 }
2052 }
2053
2054 if (pdata->wolopts & WAKE_UCAST) {
2055 netdev_info(dev->net, "enabling unicast detection\n");
2056 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2057 if (ret < 0) {
2058 netdev_warn(dev->net, "Error reading WUCSR\n");
2059 goto done;
2060 }
2061
2062 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2063
2064 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2065 if (ret < 0) {
2066 netdev_warn(dev->net, "Error writing WUCSR\n");
2067 goto done;
2068 }
2069 }
2070
2071 /* enable receiver to enable frame reception */
2072 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2073 if (ret < 0) {
2074 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2075 goto done;
2076 }
2077
2078 val |= MAC_RX_RXEN;
2079
2080 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2081 if (ret < 0) {
2082 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2083 goto done;
2084 }
2085
2086 /* some wol options are enabled, so enter SUSPEND0 */
2087 netdev_info(dev->net, "entering SUSPEND0 mode\n");
2088 ret = smsc75xx_enter_suspend0(dev);
2089
2090 done:
2091 /*
2092 * TODO: resume() might need to handle the suspend failure
2093 * in system sleep
2094 */
2095 if (ret && PMSG_IS_AUTO(message))
2096 usbnet_resume(intf);
2097 return ret;
2098 }
2099
2100 static int smsc75xx_resume(struct usb_interface *intf)
2101 {
2102 struct usbnet *dev = usb_get_intfdata(intf);
2103 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2104 u8 suspend_flags = pdata->suspend_flags;
2105 int ret;
2106 u32 val;
2107
2108 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2109
2110 /* do this first to ensure it's cleared even in error case */
2111 pdata->suspend_flags = 0;
2112
2113 if (suspend_flags & SUSPEND_ALLMODES) {
2114 /* Disable wakeup sources */
2115 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2116 if (ret < 0) {
2117 netdev_warn(dev->net, "Error reading WUCSR\n");
2118 return ret;
2119 }
2120
2121 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2122 | WUCSR_BCST_EN);
2123
2124 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2125 if (ret < 0) {
2126 netdev_warn(dev->net, "Error writing WUCSR\n");
2127 return ret;
2128 }
2129
2130 /* clear wake-up status */
2131 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2132 if (ret < 0) {
2133 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2134 return ret;
2135 }
2136
2137 val &= ~PMT_CTL_WOL_EN;
2138 val |= PMT_CTL_WUPS;
2139
2140 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2141 if (ret < 0) {
2142 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2143 return ret;
2144 }
2145 }
2146
2147 if (suspend_flags & SUSPEND_SUSPEND2) {
2148 netdev_info(dev->net, "resuming from SUSPEND2\n");
2149
2150 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2151 if (ret < 0) {
2152 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2153 return ret;
2154 }
2155
2156 val |= PMT_CTL_PHY_PWRUP;
2157
2158 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2159 if (ret < 0) {
2160 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2161 return ret;
2162 }
2163 }
2164
2165 ret = smsc75xx_wait_ready(dev, 1);
2166 if (ret < 0) {
2167 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2168 return ret;
2169 }
2170
2171 return usbnet_resume(intf);
2172 }
2173
2174 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2175 u32 rx_cmd_a, u32 rx_cmd_b)
2176 {
2177 if (!(dev->net->features & NETIF_F_RXCSUM) ||
2178 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2179 skb->ip_summed = CHECKSUM_NONE;
2180 } else {
2181 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2182 skb->ip_summed = CHECKSUM_COMPLETE;
2183 }
2184 }
2185
2186 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2187 {
2188 /* This check is no longer done by usbnet */
2189 if (skb->len < dev->net->hard_header_len)
2190 return 0;
2191
2192 while (skb->len > 0) {
2193 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2194 struct sk_buff *ax_skb;
2195 unsigned char *packet;
2196
2197 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2198 le32_to_cpus(&rx_cmd_a);
2199 skb_pull(skb, 4);
2200
2201 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2202 le32_to_cpus(&rx_cmd_b);
2203 skb_pull(skb, 4 + RXW_PADDING);
2204
2205 packet = skb->data;
2206
2207 /* get the packet length */
2208 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2209 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2210
2211 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2212 netif_dbg(dev, rx_err, dev->net,
2213 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2214 dev->net->stats.rx_errors++;
2215 dev->net->stats.rx_dropped++;
2216
2217 if (rx_cmd_a & RX_CMD_A_FCS)
2218 dev->net->stats.rx_crc_errors++;
2219 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2220 dev->net->stats.rx_frame_errors++;
2221 } else {
2222 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2223 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2224 netif_dbg(dev, rx_err, dev->net,
2225 "size err rx_cmd_a=0x%08x\n",
2226 rx_cmd_a);
2227 return 0;
2228 }
2229
2230 /* last frame in this batch */
2231 if (skb->len == size) {
2232 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2233 rx_cmd_b);
2234
2235 skb_trim(skb, skb->len - 4); /* remove fcs */
2236 skb->truesize = size + sizeof(struct sk_buff);
2237
2238 return 1;
2239 }
2240
2241 ax_skb = skb_clone(skb, GFP_ATOMIC);
2242 if (unlikely(!ax_skb)) {
2243 netdev_warn(dev->net, "Error allocating skb\n");
2244 return 0;
2245 }
2246
2247 ax_skb->len = size;
2248 ax_skb->data = packet;
2249 skb_set_tail_pointer(ax_skb, size);
2250
2251 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2252 rx_cmd_b);
2253
2254 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2255 ax_skb->truesize = size + sizeof(struct sk_buff);
2256
2257 usbnet_skb_return(dev, ax_skb);
2258 }
2259
2260 skb_pull(skb, size);
2261
2262 /* padding bytes before the next frame starts */
2263 if (skb->len)
2264 skb_pull(skb, align_count);
2265 }
2266
2267 return 1;
2268 }
2269
2270 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2271 struct sk_buff *skb, gfp_t flags)
2272 {
2273 u32 tx_cmd_a, tx_cmd_b;
2274
2275 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2276 dev_kfree_skb_any(skb);
2277 return NULL;
2278 }
2279
2280 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2281
2282 if (skb->ip_summed == CHECKSUM_PARTIAL)
2283 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2284
2285 if (skb_is_gso(skb)) {
2286 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2287 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2288
2289 tx_cmd_a |= TX_CMD_A_LSO;
2290 } else {
2291 tx_cmd_b = 0;
2292 }
2293
2294 skb_push(skb, 4);
2295 cpu_to_le32s(&tx_cmd_b);
2296 memcpy(skb->data, &tx_cmd_b, 4);
2297
2298 skb_push(skb, 4);
2299 cpu_to_le32s(&tx_cmd_a);
2300 memcpy(skb->data, &tx_cmd_a, 4);
2301
2302 return skb;
2303 }
2304
2305 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2306 {
2307 dev->intf->needs_remote_wakeup = on;
2308 return 0;
2309 }
2310
2311 static const struct driver_info smsc75xx_info = {
2312 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
2313 .bind = smsc75xx_bind,
2314 .unbind = smsc75xx_unbind,
2315 .link_reset = smsc75xx_link_reset,
2316 .reset = smsc75xx_reset,
2317 .rx_fixup = smsc75xx_rx_fixup,
2318 .tx_fixup = smsc75xx_tx_fixup,
2319 .status = smsc75xx_status,
2320 .manage_power = smsc75xx_manage_power,
2321 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2322 };
2323
2324 static const struct usb_device_id products[] = {
2325 {
2326 /* SMSC7500 USB Gigabit Ethernet Device */
2327 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2328 .driver_info = (unsigned long) &smsc75xx_info,
2329 },
2330 {
2331 /* SMSC7500 USB Gigabit Ethernet Device */
2332 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2333 .driver_info = (unsigned long) &smsc75xx_info,
2334 },
2335 { }, /* END */
2336 };
2337 MODULE_DEVICE_TABLE(usb, products);
2338
2339 static struct usb_driver smsc75xx_driver = {
2340 .name = SMSC_CHIPNAME,
2341 .id_table = products,
2342 .probe = usbnet_probe,
2343 .suspend = smsc75xx_suspend,
2344 .resume = smsc75xx_resume,
2345 .reset_resume = smsc75xx_resume,
2346 .disconnect = usbnet_disconnect,
2347 .disable_hub_initiated_lpm = 1,
2348 .supports_autosuspend = 1,
2349 };
2350
2351 module_usb_driver(smsc75xx_driver);
2352
2353 MODULE_AUTHOR("Nancy Lin");
2354 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2355 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2356 MODULE_LICENSE("GPL");
Linux with added FPC-III support