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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[mirror_ubuntu-artful-kernel.git] / drivers / net / usb / smsc75xx.c
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 __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
86 u32 *data, int in_pm)
87 {
88 u32 buf;
89 int ret;
90 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
91
92 BUG_ON(!dev);
93
94 if (!in_pm)
95 fn = usbnet_read_cmd;
96 else
97 fn = usbnet_read_cmd_nopm;
98
99 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
100 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
101 0, index, &buf, 4);
102 if (unlikely(ret < 0)) {
103 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
104 index, ret);
105 return ret;
106 }
107
108 le32_to_cpus(&buf);
109 *data = buf;
110
111 return ret;
112 }
113
114 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
115 u32 data, int in_pm)
116 {
117 u32 buf;
118 int ret;
119 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
120
121 BUG_ON(!dev);
122
123 if (!in_pm)
124 fn = usbnet_write_cmd;
125 else
126 fn = usbnet_write_cmd_nopm;
127
128 buf = data;
129 cpu_to_le32s(&buf);
130
131 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
132 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
133 0, index, &buf, 4);
134 if (unlikely(ret < 0))
135 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
136 index, ret);
137
138 return ret;
139 }
140
141 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
142 u32 *data)
143 {
144 return __smsc75xx_read_reg(dev, index, data, 1);
145 }
146
147 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
148 u32 data)
149 {
150 return __smsc75xx_write_reg(dev, index, data, 1);
151 }
152
153 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
154 u32 *data)
155 {
156 return __smsc75xx_read_reg(dev, index, data, 0);
157 }
158
159 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
160 u32 data)
161 {
162 return __smsc75xx_write_reg(dev, index, data, 0);
163 }
164
165 /* Loop until the read is completed with timeout
166 * called with phy_mutex held */
167 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
168 int in_pm)
169 {
170 unsigned long start_time = jiffies;
171 u32 val;
172 int ret;
173
174 do {
175 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
176 if (ret < 0) {
177 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
178 return ret;
179 }
180
181 if (!(val & MII_ACCESS_BUSY))
182 return 0;
183 } while (!time_after(jiffies, start_time + HZ));
184
185 return -EIO;
186 }
187
188 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
189 int in_pm)
190 {
191 struct usbnet *dev = netdev_priv(netdev);
192 u32 val, addr;
193 int ret;
194
195 mutex_lock(&dev->phy_mutex);
196
197 /* confirm MII not busy */
198 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
199 if (ret < 0) {
200 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
201 goto done;
202 }
203
204 /* set the address, index & direction (read from PHY) */
205 phy_id &= dev->mii.phy_id_mask;
206 idx &= dev->mii.reg_num_mask;
207 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
208 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
209 | MII_ACCESS_READ | MII_ACCESS_BUSY;
210 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
211 if (ret < 0) {
212 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
213 goto done;
214 }
215
216 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
217 if (ret < 0) {
218 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
219 goto done;
220 }
221
222 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
223 if (ret < 0) {
224 netdev_warn(dev->net, "Error reading MII_DATA\n");
225 goto done;
226 }
227
228 ret = (u16)(val & 0xFFFF);
229
230 done:
231 mutex_unlock(&dev->phy_mutex);
232 return ret;
233 }
234
235 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
236 int idx, int regval, int in_pm)
237 {
238 struct usbnet *dev = netdev_priv(netdev);
239 u32 val, addr;
240 int ret;
241
242 mutex_lock(&dev->phy_mutex);
243
244 /* confirm MII not busy */
245 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
246 if (ret < 0) {
247 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
248 goto done;
249 }
250
251 val = regval;
252 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
253 if (ret < 0) {
254 netdev_warn(dev->net, "Error writing MII_DATA\n");
255 goto done;
256 }
257
258 /* set the address, index & direction (write to PHY) */
259 phy_id &= dev->mii.phy_id_mask;
260 idx &= dev->mii.reg_num_mask;
261 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
262 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
263 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
264 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
265 if (ret < 0) {
266 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
267 goto done;
268 }
269
270 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
271 if (ret < 0) {
272 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
273 goto done;
274 }
275
276 done:
277 mutex_unlock(&dev->phy_mutex);
278 }
279
280 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
281 int idx)
282 {
283 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
284 }
285
286 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
287 int idx, int regval)
288 {
289 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
290 }
291
292 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
293 {
294 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
295 }
296
297 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
298 int regval)
299 {
300 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
301 }
302
303 static int smsc75xx_wait_eeprom(struct usbnet *dev)
304 {
305 unsigned long start_time = jiffies;
306 u32 val;
307 int ret;
308
309 do {
310 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
311 if (ret < 0) {
312 netdev_warn(dev->net, "Error reading E2P_CMD\n");
313 return ret;
314 }
315
316 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
317 break;
318 udelay(40);
319 } while (!time_after(jiffies, start_time + HZ));
320
321 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
322 netdev_warn(dev->net, "EEPROM read operation timeout\n");
323 return -EIO;
324 }
325
326 return 0;
327 }
328
329 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
330 {
331 unsigned long start_time = jiffies;
332 u32 val;
333 int ret;
334
335 do {
336 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
337 if (ret < 0) {
338 netdev_warn(dev->net, "Error reading E2P_CMD\n");
339 return ret;
340 }
341
342 if (!(val & E2P_CMD_BUSY))
343 return 0;
344
345 udelay(40);
346 } while (!time_after(jiffies, start_time + HZ));
347
348 netdev_warn(dev->net, "EEPROM is busy\n");
349 return -EIO;
350 }
351
352 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
353 u8 *data)
354 {
355 u32 val;
356 int i, ret;
357
358 BUG_ON(!dev);
359 BUG_ON(!data);
360
361 ret = smsc75xx_eeprom_confirm_not_busy(dev);
362 if (ret)
363 return ret;
364
365 for (i = 0; i < length; i++) {
366 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
367 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
368 if (ret < 0) {
369 netdev_warn(dev->net, "Error writing E2P_CMD\n");
370 return ret;
371 }
372
373 ret = smsc75xx_wait_eeprom(dev);
374 if (ret < 0)
375 return ret;
376
377 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
378 if (ret < 0) {
379 netdev_warn(dev->net, "Error reading E2P_DATA\n");
380 return ret;
381 }
382
383 data[i] = val & 0xFF;
384 offset++;
385 }
386
387 return 0;
388 }
389
390 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
391 u8 *data)
392 {
393 u32 val;
394 int i, ret;
395
396 BUG_ON(!dev);
397 BUG_ON(!data);
398
399 ret = smsc75xx_eeprom_confirm_not_busy(dev);
400 if (ret)
401 return ret;
402
403 /* Issue write/erase enable command */
404 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
405 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
406 if (ret < 0) {
407 netdev_warn(dev->net, "Error writing E2P_CMD\n");
408 return ret;
409 }
410
411 ret = smsc75xx_wait_eeprom(dev);
412 if (ret < 0)
413 return ret;
414
415 for (i = 0; i < length; i++) {
416
417 /* Fill data register */
418 val = data[i];
419 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
420 if (ret < 0) {
421 netdev_warn(dev->net, "Error writing E2P_DATA\n");
422 return ret;
423 }
424
425 /* Send "write" command */
426 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
427 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
428 if (ret < 0) {
429 netdev_warn(dev->net, "Error writing E2P_CMD\n");
430 return ret;
431 }
432
433 ret = smsc75xx_wait_eeprom(dev);
434 if (ret < 0)
435 return ret;
436
437 offset++;
438 }
439
440 return 0;
441 }
442
443 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
444 {
445 int i, ret;
446
447 for (i = 0; i < 100; i++) {
448 u32 dp_sel;
449 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
450 if (ret < 0) {
451 netdev_warn(dev->net, "Error reading DP_SEL\n");
452 return ret;
453 }
454
455 if (dp_sel & DP_SEL_DPRDY)
456 return 0;
457
458 udelay(40);
459 }
460
461 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
462
463 return -EIO;
464 }
465
466 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
467 u32 length, u32 *buf)
468 {
469 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
470 u32 dp_sel;
471 int i, ret;
472
473 mutex_lock(&pdata->dataport_mutex);
474
475 ret = smsc75xx_dataport_wait_not_busy(dev);
476 if (ret < 0) {
477 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
478 goto done;
479 }
480
481 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
482 if (ret < 0) {
483 netdev_warn(dev->net, "Error reading DP_SEL\n");
484 goto done;
485 }
486
487 dp_sel &= ~DP_SEL_RSEL;
488 dp_sel |= ram_select;
489 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
490 if (ret < 0) {
491 netdev_warn(dev->net, "Error writing DP_SEL\n");
492 goto done;
493 }
494
495 for (i = 0; i < length; i++) {
496 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
497 if (ret < 0) {
498 netdev_warn(dev->net, "Error writing DP_ADDR\n");
499 goto done;
500 }
501
502 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
503 if (ret < 0) {
504 netdev_warn(dev->net, "Error writing DP_DATA\n");
505 goto done;
506 }
507
508 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
509 if (ret < 0) {
510 netdev_warn(dev->net, "Error writing DP_CMD\n");
511 goto done;
512 }
513
514 ret = smsc75xx_dataport_wait_not_busy(dev);
515 if (ret < 0) {
516 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
517 goto done;
518 }
519 }
520
521 done:
522 mutex_unlock(&pdata->dataport_mutex);
523 return ret;
524 }
525
526 /* returns hash bit number for given MAC address */
527 static u32 smsc75xx_hash(char addr[ETH_ALEN])
528 {
529 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
530 }
531
532 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
533 {
534 struct smsc75xx_priv *pdata =
535 container_of(param, struct smsc75xx_priv, set_multicast);
536 struct usbnet *dev = pdata->dev;
537 int ret;
538
539 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
540 pdata->rfe_ctl);
541
542 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
543 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
544
545 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
546 if (ret < 0)
547 netdev_warn(dev->net, "Error writing RFE_CRL\n");
548 }
549
550 static void smsc75xx_set_multicast(struct net_device *netdev)
551 {
552 struct usbnet *dev = netdev_priv(netdev);
553 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
554 unsigned long flags;
555 int i;
556
557 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
558
559 pdata->rfe_ctl &=
560 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
561 pdata->rfe_ctl |= RFE_CTL_AB;
562
563 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
564 pdata->multicast_hash_table[i] = 0;
565
566 if (dev->net->flags & IFF_PROMISC) {
567 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
568 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
569 } else if (dev->net->flags & IFF_ALLMULTI) {
570 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
571 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
572 } else if (!netdev_mc_empty(dev->net)) {
573 struct netdev_hw_addr *ha;
574
575 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
576
577 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
578
579 netdev_for_each_mc_addr(ha, netdev) {
580 u32 bitnum = smsc75xx_hash(ha->addr);
581 pdata->multicast_hash_table[bitnum / 32] |=
582 (1 << (bitnum % 32));
583 }
584 } else {
585 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
586 pdata->rfe_ctl |= RFE_CTL_DPF;
587 }
588
589 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
590
591 /* defer register writes to a sleepable context */
592 schedule_work(&pdata->set_multicast);
593 }
594
595 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
596 u16 lcladv, u16 rmtadv)
597 {
598 u32 flow = 0, fct_flow = 0;
599 int ret;
600
601 if (duplex == DUPLEX_FULL) {
602 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
603
604 if (cap & FLOW_CTRL_TX) {
605 flow = (FLOW_TX_FCEN | 0xFFFF);
606 /* set fct_flow thresholds to 20% and 80% */
607 fct_flow = (8 << 8) | 32;
608 }
609
610 if (cap & FLOW_CTRL_RX)
611 flow |= FLOW_RX_FCEN;
612
613 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
614 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
615 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
616 } else {
617 netif_dbg(dev, link, dev->net, "half duplex\n");
618 }
619
620 ret = smsc75xx_write_reg(dev, FLOW, flow);
621 if (ret < 0) {
622 netdev_warn(dev->net, "Error writing FLOW\n");
623 return ret;
624 }
625
626 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
627 if (ret < 0) {
628 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
629 return ret;
630 }
631
632 return 0;
633 }
634
635 static int smsc75xx_link_reset(struct usbnet *dev)
636 {
637 struct mii_if_info *mii = &dev->mii;
638 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
639 u16 lcladv, rmtadv;
640 int ret;
641
642 /* write to clear phy interrupt status */
643 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
644 PHY_INT_SRC_CLEAR_ALL);
645
646 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
647 if (ret < 0) {
648 netdev_warn(dev->net, "Error writing INT_STS\n");
649 return ret;
650 }
651
652 mii_check_media(mii, 1, 1);
653 mii_ethtool_gset(&dev->mii, &ecmd);
654 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
655 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
656
657 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
658 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
659
660 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
661 }
662
663 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
664 {
665 u32 intdata;
666
667 if (urb->actual_length != 4) {
668 netdev_warn(dev->net, "unexpected urb length %d\n",
669 urb->actual_length);
670 return;
671 }
672
673 memcpy(&intdata, urb->transfer_buffer, 4);
674 le32_to_cpus(&intdata);
675
676 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
677
678 if (intdata & INT_ENP_PHY_INT)
679 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
680 else
681 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
682 intdata);
683 }
684
685 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
686 {
687 return MAX_EEPROM_SIZE;
688 }
689
690 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
691 struct ethtool_eeprom *ee, u8 *data)
692 {
693 struct usbnet *dev = netdev_priv(netdev);
694
695 ee->magic = LAN75XX_EEPROM_MAGIC;
696
697 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
698 }
699
700 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
701 struct ethtool_eeprom *ee, u8 *data)
702 {
703 struct usbnet *dev = netdev_priv(netdev);
704
705 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
706 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
707 ee->magic);
708 return -EINVAL;
709 }
710
711 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
712 }
713
714 static void smsc75xx_ethtool_get_wol(struct net_device *net,
715 struct ethtool_wolinfo *wolinfo)
716 {
717 struct usbnet *dev = netdev_priv(net);
718 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
719
720 wolinfo->supported = SUPPORTED_WAKE;
721 wolinfo->wolopts = pdata->wolopts;
722 }
723
724 static int smsc75xx_ethtool_set_wol(struct net_device *net,
725 struct ethtool_wolinfo *wolinfo)
726 {
727 struct usbnet *dev = netdev_priv(net);
728 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
729 int ret;
730
731 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
732
733 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
734 if (ret < 0)
735 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
736
737 return ret;
738 }
739
740 static const struct ethtool_ops smsc75xx_ethtool_ops = {
741 .get_link = usbnet_get_link,
742 .nway_reset = usbnet_nway_reset,
743 .get_drvinfo = usbnet_get_drvinfo,
744 .get_msglevel = usbnet_get_msglevel,
745 .set_msglevel = usbnet_set_msglevel,
746 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
747 .get_eeprom = smsc75xx_ethtool_get_eeprom,
748 .set_eeprom = smsc75xx_ethtool_set_eeprom,
749 .get_wol = smsc75xx_ethtool_get_wol,
750 .set_wol = smsc75xx_ethtool_set_wol,
751 .get_link_ksettings = usbnet_get_link_ksettings,
752 .set_link_ksettings = usbnet_set_link_ksettings,
753 };
754
755 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
756 {
757 struct usbnet *dev = netdev_priv(netdev);
758
759 if (!netif_running(netdev))
760 return -EINVAL;
761
762 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
763 }
764
765 static void smsc75xx_init_mac_address(struct usbnet *dev)
766 {
767 const u8 *mac_addr;
768
769 /* maybe the boot loader passed the MAC address in devicetree */
770 mac_addr = of_get_mac_address(dev->udev->dev.of_node);
771 if (mac_addr) {
772 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
773 return;
774 }
775
776 /* try reading mac address from EEPROM */
777 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
778 dev->net->dev_addr) == 0) {
779 if (is_valid_ether_addr(dev->net->dev_addr)) {
780 /* eeprom values are valid so use them */
781 netif_dbg(dev, ifup, dev->net,
782 "MAC address read from EEPROM\n");
783 return;
784 }
785 }
786
787 /* no useful static MAC address found. generate a random one */
788 eth_hw_addr_random(dev->net);
789 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
790 }
791
792 static int smsc75xx_set_mac_address(struct usbnet *dev)
793 {
794 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
795 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
796 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
797
798 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
799 if (ret < 0) {
800 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
801 return ret;
802 }
803
804 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
805 if (ret < 0) {
806 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
807 return ret;
808 }
809
810 addr_hi |= ADDR_FILTX_FB_VALID;
811 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
812 if (ret < 0) {
813 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
814 return ret;
815 }
816
817 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
818 if (ret < 0)
819 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
820
821 return ret;
822 }
823
824 static int smsc75xx_phy_initialize(struct usbnet *dev)
825 {
826 int bmcr, ret, timeout = 0;
827
828 /* Initialize MII structure */
829 dev->mii.dev = dev->net;
830 dev->mii.mdio_read = smsc75xx_mdio_read;
831 dev->mii.mdio_write = smsc75xx_mdio_write;
832 dev->mii.phy_id_mask = 0x1f;
833 dev->mii.reg_num_mask = 0x1f;
834 dev->mii.supports_gmii = 1;
835 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
836
837 /* reset phy and wait for reset to complete */
838 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
839
840 do {
841 msleep(10);
842 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
843 if (bmcr < 0) {
844 netdev_warn(dev->net, "Error reading MII_BMCR\n");
845 return bmcr;
846 }
847 timeout++;
848 } while ((bmcr & BMCR_RESET) && (timeout < 100));
849
850 if (timeout >= 100) {
851 netdev_warn(dev->net, "timeout on PHY Reset\n");
852 return -EIO;
853 }
854
855 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
856 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
857 ADVERTISE_PAUSE_ASYM);
858 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
859 ADVERTISE_1000FULL);
860
861 /* read and write to clear phy interrupt status */
862 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
863 if (ret < 0) {
864 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
865 return ret;
866 }
867
868 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
869
870 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
871 PHY_INT_MASK_DEFAULT);
872 mii_nway_restart(&dev->mii);
873
874 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
875 return 0;
876 }
877
878 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
879 {
880 int ret = 0;
881 u32 buf;
882 bool rxenabled;
883
884 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
885 if (ret < 0) {
886 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
887 return ret;
888 }
889
890 rxenabled = ((buf & MAC_RX_RXEN) != 0);
891
892 if (rxenabled) {
893 buf &= ~MAC_RX_RXEN;
894 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
895 if (ret < 0) {
896 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
897 return ret;
898 }
899 }
900
901 /* add 4 to size for FCS */
902 buf &= ~MAC_RX_MAX_SIZE;
903 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
904
905 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
906 if (ret < 0) {
907 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
908 return ret;
909 }
910
911 if (rxenabled) {
912 buf |= MAC_RX_RXEN;
913 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
914 if (ret < 0) {
915 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
916 return ret;
917 }
918 }
919
920 return 0;
921 }
922
923 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
924 {
925 struct usbnet *dev = netdev_priv(netdev);
926 int ret;
927
928 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
929 if (ret < 0) {
930 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
931 return ret;
932 }
933
934 return usbnet_change_mtu(netdev, new_mtu);
935 }
936
937 /* Enable or disable Rx checksum offload engine */
938 static int smsc75xx_set_features(struct net_device *netdev,
939 netdev_features_t features)
940 {
941 struct usbnet *dev = netdev_priv(netdev);
942 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
943 unsigned long flags;
944 int ret;
945
946 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
947
948 if (features & NETIF_F_RXCSUM)
949 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
950 else
951 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
952
953 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
954 /* it's racing here! */
955
956 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
957 if (ret < 0)
958 netdev_warn(dev->net, "Error writing RFE_CTL\n");
959
960 return ret;
961 }
962
963 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
964 {
965 int timeout = 0;
966
967 do {
968 u32 buf;
969 int ret;
970
971 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
972
973 if (ret < 0) {
974 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
975 return ret;
976 }
977
978 if (buf & PMT_CTL_DEV_RDY)
979 return 0;
980
981 msleep(10);
982 timeout++;
983 } while (timeout < 100);
984
985 netdev_warn(dev->net, "timeout waiting for device ready\n");
986 return -EIO;
987 }
988
989 static int smsc75xx_reset(struct usbnet *dev)
990 {
991 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
992 u32 buf;
993 int ret = 0, timeout;
994
995 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
996
997 ret = smsc75xx_wait_ready(dev, 0);
998 if (ret < 0) {
999 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1000 return ret;
1001 }
1002
1003 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1004 if (ret < 0) {
1005 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1006 return ret;
1007 }
1008
1009 buf |= HW_CFG_LRST;
1010
1011 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1012 if (ret < 0) {
1013 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1014 return ret;
1015 }
1016
1017 timeout = 0;
1018 do {
1019 msleep(10);
1020 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1021 if (ret < 0) {
1022 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1023 return ret;
1024 }
1025 timeout++;
1026 } while ((buf & HW_CFG_LRST) && (timeout < 100));
1027
1028 if (timeout >= 100) {
1029 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1030 return -EIO;
1031 }
1032
1033 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1034
1035 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1036 if (ret < 0) {
1037 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1038 return ret;
1039 }
1040
1041 buf |= PMT_CTL_PHY_RST;
1042
1043 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1044 if (ret < 0) {
1045 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1046 return ret;
1047 }
1048
1049 timeout = 0;
1050 do {
1051 msleep(10);
1052 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1053 if (ret < 0) {
1054 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1055 return ret;
1056 }
1057 timeout++;
1058 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1059
1060 if (timeout >= 100) {
1061 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1062 return -EIO;
1063 }
1064
1065 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1066
1067 ret = smsc75xx_set_mac_address(dev);
1068 if (ret < 0) {
1069 netdev_warn(dev->net, "Failed to set mac address\n");
1070 return ret;
1071 }
1072
1073 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1074 dev->net->dev_addr);
1075
1076 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1077 if (ret < 0) {
1078 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1079 return ret;
1080 }
1081
1082 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1083 buf);
1084
1085 buf |= HW_CFG_BIR;
1086
1087 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1088 if (ret < 0) {
1089 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1090 return ret;
1091 }
1092
1093 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1094 if (ret < 0) {
1095 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1096 return ret;
1097 }
1098
1099 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1100 buf);
1101
1102 if (!turbo_mode) {
1103 buf = 0;
1104 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1105 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1106 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1107 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1108 } else {
1109 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1110 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1111 }
1112
1113 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1114 (ulong)dev->rx_urb_size);
1115
1116 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1117 if (ret < 0) {
1118 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1119 return ret;
1120 }
1121
1122 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1123 if (ret < 0) {
1124 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1125 return ret;
1126 }
1127
1128 netif_dbg(dev, ifup, dev->net,
1129 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1130
1131 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1132 if (ret < 0) {
1133 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1134 return ret;
1135 }
1136
1137 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1138 if (ret < 0) {
1139 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1140 return ret;
1141 }
1142
1143 netif_dbg(dev, ifup, dev->net,
1144 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1145
1146 if (turbo_mode) {
1147 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1148 if (ret < 0) {
1149 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1150 return ret;
1151 }
1152
1153 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1154
1155 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1156
1157 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1158 if (ret < 0) {
1159 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1160 return ret;
1161 }
1162
1163 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1164 if (ret < 0) {
1165 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1166 return ret;
1167 }
1168
1169 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1170 }
1171
1172 /* set FIFO sizes */
1173 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1174 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1175 if (ret < 0) {
1176 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1177 return ret;
1178 }
1179
1180 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1181
1182 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1183 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1184 if (ret < 0) {
1185 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1186 return ret;
1187 }
1188
1189 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1190
1191 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1192 if (ret < 0) {
1193 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1194 return ret;
1195 }
1196
1197 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1198 if (ret < 0) {
1199 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1200 return ret;
1201 }
1202
1203 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1204
1205 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1206 if (ret < 0) {
1207 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1208 return ret;
1209 }
1210
1211 /* only set default GPIO/LED settings if no EEPROM is detected */
1212 if (!(buf & E2P_CMD_LOADED)) {
1213 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1214 if (ret < 0) {
1215 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1216 return ret;
1217 }
1218
1219 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1220 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1221
1222 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1223 if (ret < 0) {
1224 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1225 return ret;
1226 }
1227 }
1228
1229 ret = smsc75xx_write_reg(dev, FLOW, 0);
1230 if (ret < 0) {
1231 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1232 return ret;
1233 }
1234
1235 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1236 if (ret < 0) {
1237 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1238 return ret;
1239 }
1240
1241 /* Don't need rfe_ctl_lock during initialisation */
1242 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1243 if (ret < 0) {
1244 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1245 return ret;
1246 }
1247
1248 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1249
1250 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1251 if (ret < 0) {
1252 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1253 return ret;
1254 }
1255
1256 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1257 if (ret < 0) {
1258 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1259 return ret;
1260 }
1261
1262 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1263 pdata->rfe_ctl);
1264
1265 /* Enable or disable checksum offload engines */
1266 smsc75xx_set_features(dev->net, dev->net->features);
1267
1268 smsc75xx_set_multicast(dev->net);
1269
1270 ret = smsc75xx_phy_initialize(dev);
1271 if (ret < 0) {
1272 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1273 return ret;
1274 }
1275
1276 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1277 if (ret < 0) {
1278 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1279 return ret;
1280 }
1281
1282 /* enable PHY interrupts */
1283 buf |= INT_ENP_PHY_INT;
1284
1285 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1286 if (ret < 0) {
1287 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1288 return ret;
1289 }
1290
1291 /* allow mac to detect speed and duplex from phy */
1292 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1293 if (ret < 0) {
1294 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1295 return ret;
1296 }
1297
1298 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1299 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1300 if (ret < 0) {
1301 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1302 return ret;
1303 }
1304
1305 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1306 if (ret < 0) {
1307 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1308 return ret;
1309 }
1310
1311 buf |= MAC_TX_TXEN;
1312
1313 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1314 if (ret < 0) {
1315 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1316 return ret;
1317 }
1318
1319 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1320
1321 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1322 if (ret < 0) {
1323 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1324 return ret;
1325 }
1326
1327 buf |= FCT_TX_CTL_EN;
1328
1329 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1330 if (ret < 0) {
1331 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1332 return ret;
1333 }
1334
1335 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1336
1337 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1338 if (ret < 0) {
1339 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1340 return ret;
1341 }
1342
1343 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1344 if (ret < 0) {
1345 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1346 return ret;
1347 }
1348
1349 buf |= MAC_RX_RXEN;
1350
1351 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1352 if (ret < 0) {
1353 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1354 return ret;
1355 }
1356
1357 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1358
1359 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1360 if (ret < 0) {
1361 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1362 return ret;
1363 }
1364
1365 buf |= FCT_RX_CTL_EN;
1366
1367 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1368 if (ret < 0) {
1369 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1370 return ret;
1371 }
1372
1373 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1374
1375 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1376 return 0;
1377 }
1378
1379 static const struct net_device_ops smsc75xx_netdev_ops = {
1380 .ndo_open = usbnet_open,
1381 .ndo_stop = usbnet_stop,
1382 .ndo_start_xmit = usbnet_start_xmit,
1383 .ndo_tx_timeout = usbnet_tx_timeout,
1384 .ndo_get_stats64 = usbnet_get_stats64,
1385 .ndo_change_mtu = smsc75xx_change_mtu,
1386 .ndo_set_mac_address = eth_mac_addr,
1387 .ndo_validate_addr = eth_validate_addr,
1388 .ndo_do_ioctl = smsc75xx_ioctl,
1389 .ndo_set_rx_mode = smsc75xx_set_multicast,
1390 .ndo_set_features = smsc75xx_set_features,
1391 };
1392
1393 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1394 {
1395 struct smsc75xx_priv *pdata = NULL;
1396 int ret;
1397
1398 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1399
1400 ret = usbnet_get_endpoints(dev, intf);
1401 if (ret < 0) {
1402 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1403 return ret;
1404 }
1405
1406 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1407 GFP_KERNEL);
1408
1409 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1410 if (!pdata)
1411 return -ENOMEM;
1412
1413 pdata->dev = dev;
1414
1415 spin_lock_init(&pdata->rfe_ctl_lock);
1416 mutex_init(&pdata->dataport_mutex);
1417
1418 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1419
1420 if (DEFAULT_TX_CSUM_ENABLE)
1421 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1422
1423 if (DEFAULT_RX_CSUM_ENABLE)
1424 dev->net->features |= NETIF_F_RXCSUM;
1425
1426 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1427 NETIF_F_RXCSUM;
1428
1429 ret = smsc75xx_wait_ready(dev, 0);
1430 if (ret < 0) {
1431 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1432 return ret;
1433 }
1434
1435 smsc75xx_init_mac_address(dev);
1436
1437 /* Init all registers */
1438 ret = smsc75xx_reset(dev);
1439 if (ret < 0) {
1440 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1441 return ret;
1442 }
1443
1444 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1445 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1446 dev->net->flags |= IFF_MULTICAST;
1447 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1448 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1449 dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1450 return 0;
1451 }
1452
1453 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1454 {
1455 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1456 if (pdata) {
1457 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1458 kfree(pdata);
1459 pdata = NULL;
1460 dev->data[0] = 0;
1461 }
1462 }
1463
1464 static u16 smsc_crc(const u8 *buffer, size_t len)
1465 {
1466 return bitrev16(crc16(0xFFFF, buffer, len));
1467 }
1468
1469 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1470 u32 wuf_mask1)
1471 {
1472 int cfg_base = WUF_CFGX + filter * 4;
1473 int mask_base = WUF_MASKX + filter * 16;
1474 int ret;
1475
1476 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1477 if (ret < 0) {
1478 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1479 return ret;
1480 }
1481
1482 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1483 if (ret < 0) {
1484 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1485 return ret;
1486 }
1487
1488 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1489 if (ret < 0) {
1490 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1491 return ret;
1492 }
1493
1494 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1495 if (ret < 0) {
1496 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1497 return ret;
1498 }
1499
1500 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1501 if (ret < 0) {
1502 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1503 return ret;
1504 }
1505
1506 return 0;
1507 }
1508
1509 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1510 {
1511 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1512 u32 val;
1513 int ret;
1514
1515 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1516 if (ret < 0) {
1517 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1518 return ret;
1519 }
1520
1521 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1522 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1523
1524 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1525 if (ret < 0) {
1526 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1527 return ret;
1528 }
1529
1530 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1531
1532 return 0;
1533 }
1534
1535 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1536 {
1537 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1538 u32 val;
1539 int ret;
1540
1541 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1542 if (ret < 0) {
1543 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1544 return ret;
1545 }
1546
1547 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1548 val |= PMT_CTL_SUS_MODE_1;
1549
1550 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1551 if (ret < 0) {
1552 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1553 return ret;
1554 }
1555
1556 /* clear wol status, enable energy detection */
1557 val &= ~PMT_CTL_WUPS;
1558 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1559
1560 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1561 if (ret < 0) {
1562 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1563 return ret;
1564 }
1565
1566 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1567
1568 return 0;
1569 }
1570
1571 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1572 {
1573 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1574 u32 val;
1575 int ret;
1576
1577 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1578 if (ret < 0) {
1579 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1580 return ret;
1581 }
1582
1583 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1584 val |= PMT_CTL_SUS_MODE_2;
1585
1586 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1587 if (ret < 0) {
1588 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1589 return ret;
1590 }
1591
1592 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1593
1594 return 0;
1595 }
1596
1597 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1598 {
1599 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1600 u32 val;
1601 int ret;
1602
1603 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1604 if (ret < 0) {
1605 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1606 return ret;
1607 }
1608
1609 if (val & FCT_RX_CTL_RXUSED) {
1610 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1611 return -EBUSY;
1612 }
1613
1614 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1615 if (ret < 0) {
1616 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1617 return ret;
1618 }
1619
1620 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1621 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1622
1623 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1624 if (ret < 0) {
1625 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1626 return ret;
1627 }
1628
1629 /* clear wol status */
1630 val &= ~PMT_CTL_WUPS;
1631 val |= PMT_CTL_WUPS_WOL;
1632
1633 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1634 if (ret < 0) {
1635 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1636 return ret;
1637 }
1638
1639 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1640
1641 return 0;
1642 }
1643
1644 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1645 {
1646 struct mii_if_info *mii = &dev->mii;
1647 int ret;
1648
1649 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1650
1651 /* read to clear */
1652 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1653 if (ret < 0) {
1654 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1655 return ret;
1656 }
1657
1658 /* enable interrupt source */
1659 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1660 if (ret < 0) {
1661 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1662 return ret;
1663 }
1664
1665 ret |= mask;
1666
1667 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1668
1669 return 0;
1670 }
1671
1672 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1673 {
1674 struct mii_if_info *mii = &dev->mii;
1675 int ret;
1676
1677 /* first, a dummy read, needed to latch some MII phys */
1678 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1679 if (ret < 0) {
1680 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1681 return ret;
1682 }
1683
1684 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1685 if (ret < 0) {
1686 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1687 return ret;
1688 }
1689
1690 return !!(ret & BMSR_LSTATUS);
1691 }
1692
1693 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1694 {
1695 int ret;
1696
1697 if (!netif_running(dev->net)) {
1698 /* interface is ifconfig down so fully power down hw */
1699 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1700 return smsc75xx_enter_suspend2(dev);
1701 }
1702
1703 if (!link_up) {
1704 /* link is down so enter EDPD mode */
1705 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1706
1707 /* enable PHY wakeup events for if cable is attached */
1708 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1709 PHY_INT_MASK_ANEG_COMP);
1710 if (ret < 0) {
1711 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1712 return ret;
1713 }
1714
1715 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1716 return smsc75xx_enter_suspend1(dev);
1717 }
1718
1719 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1720 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1721 PHY_INT_MASK_LINK_DOWN);
1722 if (ret < 0) {
1723 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1724 return ret;
1725 }
1726
1727 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1728 return smsc75xx_enter_suspend3(dev);
1729 }
1730
1731 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1732 {
1733 struct usbnet *dev = usb_get_intfdata(intf);
1734 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1735 u32 val, link_up;
1736 int ret;
1737
1738 ret = usbnet_suspend(intf, message);
1739 if (ret < 0) {
1740 netdev_warn(dev->net, "usbnet_suspend error\n");
1741 return ret;
1742 }
1743
1744 if (pdata->suspend_flags) {
1745 netdev_warn(dev->net, "error during last resume\n");
1746 pdata->suspend_flags = 0;
1747 }
1748
1749 /* determine if link is up using only _nopm functions */
1750 link_up = smsc75xx_link_ok_nopm(dev);
1751
1752 if (message.event == PM_EVENT_AUTO_SUSPEND) {
1753 ret = smsc75xx_autosuspend(dev, link_up);
1754 goto done;
1755 }
1756
1757 /* if we get this far we're not autosuspending */
1758 /* if no wol options set, or if link is down and we're not waking on
1759 * PHY activity, enter lowest power SUSPEND2 mode
1760 */
1761 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1762 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1763 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1764
1765 /* disable energy detect (link up) & wake up events */
1766 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1767 if (ret < 0) {
1768 netdev_warn(dev->net, "Error reading WUCSR\n");
1769 goto done;
1770 }
1771
1772 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1773
1774 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1775 if (ret < 0) {
1776 netdev_warn(dev->net, "Error writing WUCSR\n");
1777 goto done;
1778 }
1779
1780 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1781 if (ret < 0) {
1782 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1783 goto done;
1784 }
1785
1786 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1787
1788 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1789 if (ret < 0) {
1790 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1791 goto done;
1792 }
1793
1794 ret = smsc75xx_enter_suspend2(dev);
1795 goto done;
1796 }
1797
1798 if (pdata->wolopts & WAKE_PHY) {
1799 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1800 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1801 if (ret < 0) {
1802 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1803 goto done;
1804 }
1805
1806 /* if link is down then configure EDPD and enter SUSPEND1,
1807 * otherwise enter SUSPEND0 below
1808 */
1809 if (!link_up) {
1810 struct mii_if_info *mii = &dev->mii;
1811 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1812
1813 /* enable energy detect power-down mode */
1814 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1815 PHY_MODE_CTRL_STS);
1816 if (ret < 0) {
1817 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1818 goto done;
1819 }
1820
1821 ret |= MODE_CTRL_STS_EDPWRDOWN;
1822
1823 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1824 PHY_MODE_CTRL_STS, ret);
1825
1826 /* enter SUSPEND1 mode */
1827 ret = smsc75xx_enter_suspend1(dev);
1828 goto done;
1829 }
1830 }
1831
1832 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1833 int i, filter = 0;
1834
1835 /* disable all filters */
1836 for (i = 0; i < WUF_NUM; i++) {
1837 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1838 if (ret < 0) {
1839 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1840 goto done;
1841 }
1842 }
1843
1844 if (pdata->wolopts & WAKE_MCAST) {
1845 const u8 mcast[] = {0x01, 0x00, 0x5E};
1846 netdev_info(dev->net, "enabling multicast detection\n");
1847
1848 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1849 | smsc_crc(mcast, 3);
1850 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1851 if (ret < 0) {
1852 netdev_warn(dev->net, "Error writing wakeup filter\n");
1853 goto done;
1854 }
1855 }
1856
1857 if (pdata->wolopts & WAKE_ARP) {
1858 const u8 arp[] = {0x08, 0x06};
1859 netdev_info(dev->net, "enabling ARP detection\n");
1860
1861 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1862 | smsc_crc(arp, 2);
1863 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1864 if (ret < 0) {
1865 netdev_warn(dev->net, "Error writing wakeup filter\n");
1866 goto done;
1867 }
1868 }
1869
1870 /* clear any pending pattern match packet status */
1871 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1872 if (ret < 0) {
1873 netdev_warn(dev->net, "Error reading WUCSR\n");
1874 goto done;
1875 }
1876
1877 val |= WUCSR_WUFR;
1878
1879 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1880 if (ret < 0) {
1881 netdev_warn(dev->net, "Error writing WUCSR\n");
1882 goto done;
1883 }
1884
1885 netdev_info(dev->net, "enabling packet match detection\n");
1886 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1887 if (ret < 0) {
1888 netdev_warn(dev->net, "Error reading WUCSR\n");
1889 goto done;
1890 }
1891
1892 val |= WUCSR_WUEN;
1893
1894 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1895 if (ret < 0) {
1896 netdev_warn(dev->net, "Error writing WUCSR\n");
1897 goto done;
1898 }
1899 } else {
1900 netdev_info(dev->net, "disabling packet match detection\n");
1901 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1902 if (ret < 0) {
1903 netdev_warn(dev->net, "Error reading WUCSR\n");
1904 goto done;
1905 }
1906
1907 val &= ~WUCSR_WUEN;
1908
1909 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1910 if (ret < 0) {
1911 netdev_warn(dev->net, "Error writing WUCSR\n");
1912 goto done;
1913 }
1914 }
1915
1916 /* disable magic, bcast & unicast wakeup sources */
1917 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1918 if (ret < 0) {
1919 netdev_warn(dev->net, "Error reading WUCSR\n");
1920 goto done;
1921 }
1922
1923 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1924
1925 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1926 if (ret < 0) {
1927 netdev_warn(dev->net, "Error writing WUCSR\n");
1928 goto done;
1929 }
1930
1931 if (pdata->wolopts & WAKE_PHY) {
1932 netdev_info(dev->net, "enabling PHY wakeup\n");
1933
1934 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1935 if (ret < 0) {
1936 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1937 goto done;
1938 }
1939
1940 /* clear wol status, enable energy detection */
1941 val &= ~PMT_CTL_WUPS;
1942 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1943
1944 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1945 if (ret < 0) {
1946 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1947 goto done;
1948 }
1949 }
1950
1951 if (pdata->wolopts & WAKE_MAGIC) {
1952 netdev_info(dev->net, "enabling magic packet wakeup\n");
1953 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1954 if (ret < 0) {
1955 netdev_warn(dev->net, "Error reading WUCSR\n");
1956 goto done;
1957 }
1958
1959 /* clear any pending magic packet status */
1960 val |= WUCSR_MPR | WUCSR_MPEN;
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 }
1968
1969 if (pdata->wolopts & WAKE_BCAST) {
1970 netdev_info(dev->net, "enabling broadcast detection\n");
1971 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1972 if (ret < 0) {
1973 netdev_warn(dev->net, "Error reading WUCSR\n");
1974 goto done;
1975 }
1976
1977 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1978
1979 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1980 if (ret < 0) {
1981 netdev_warn(dev->net, "Error writing WUCSR\n");
1982 goto done;
1983 }
1984 }
1985
1986 if (pdata->wolopts & WAKE_UCAST) {
1987 netdev_info(dev->net, "enabling unicast detection\n");
1988 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1989 if (ret < 0) {
1990 netdev_warn(dev->net, "Error reading WUCSR\n");
1991 goto done;
1992 }
1993
1994 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1995
1996 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1997 if (ret < 0) {
1998 netdev_warn(dev->net, "Error writing WUCSR\n");
1999 goto done;
2000 }
2001 }
2002
2003 /* enable receiver to enable frame reception */
2004 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2005 if (ret < 0) {
2006 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2007 goto done;
2008 }
2009
2010 val |= MAC_RX_RXEN;
2011
2012 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2013 if (ret < 0) {
2014 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2015 goto done;
2016 }
2017
2018 /* some wol options are enabled, so enter SUSPEND0 */
2019 netdev_info(dev->net, "entering SUSPEND0 mode\n");
2020 ret = smsc75xx_enter_suspend0(dev);
2021
2022 done:
2023 /*
2024 * TODO: resume() might need to handle the suspend failure
2025 * in system sleep
2026 */
2027 if (ret && PMSG_IS_AUTO(message))
2028 usbnet_resume(intf);
2029 return ret;
2030 }
2031
2032 static int smsc75xx_resume(struct usb_interface *intf)
2033 {
2034 struct usbnet *dev = usb_get_intfdata(intf);
2035 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2036 u8 suspend_flags = pdata->suspend_flags;
2037 int ret;
2038 u32 val;
2039
2040 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2041
2042 /* do this first to ensure it's cleared even in error case */
2043 pdata->suspend_flags = 0;
2044
2045 if (suspend_flags & SUSPEND_ALLMODES) {
2046 /* Disable wakeup sources */
2047 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2048 if (ret < 0) {
2049 netdev_warn(dev->net, "Error reading WUCSR\n");
2050 return ret;
2051 }
2052
2053 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2054 | WUCSR_BCST_EN);
2055
2056 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2057 if (ret < 0) {
2058 netdev_warn(dev->net, "Error writing WUCSR\n");
2059 return ret;
2060 }
2061
2062 /* clear wake-up status */
2063 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2064 if (ret < 0) {
2065 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2066 return ret;
2067 }
2068
2069 val &= ~PMT_CTL_WOL_EN;
2070 val |= PMT_CTL_WUPS;
2071
2072 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2073 if (ret < 0) {
2074 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2075 return ret;
2076 }
2077 }
2078
2079 if (suspend_flags & SUSPEND_SUSPEND2) {
2080 netdev_info(dev->net, "resuming from SUSPEND2\n");
2081
2082 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2083 if (ret < 0) {
2084 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2085 return ret;
2086 }
2087
2088 val |= PMT_CTL_PHY_PWRUP;
2089
2090 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2091 if (ret < 0) {
2092 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2093 return ret;
2094 }
2095 }
2096
2097 ret = smsc75xx_wait_ready(dev, 1);
2098 if (ret < 0) {
2099 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2100 return ret;
2101 }
2102
2103 return usbnet_resume(intf);
2104 }
2105
2106 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2107 u32 rx_cmd_a, u32 rx_cmd_b)
2108 {
2109 if (!(dev->net->features & NETIF_F_RXCSUM) ||
2110 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2111 skb->ip_summed = CHECKSUM_NONE;
2112 } else {
2113 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2114 skb->ip_summed = CHECKSUM_COMPLETE;
2115 }
2116 }
2117
2118 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2119 {
2120 /* This check is no longer done by usbnet */
2121 if (skb->len < dev->net->hard_header_len)
2122 return 0;
2123
2124 while (skb->len > 0) {
2125 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2126 struct sk_buff *ax_skb;
2127 unsigned char *packet;
2128
2129 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2130 le32_to_cpus(&rx_cmd_a);
2131 skb_pull(skb, 4);
2132
2133 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2134 le32_to_cpus(&rx_cmd_b);
2135 skb_pull(skb, 4 + RXW_PADDING);
2136
2137 packet = skb->data;
2138
2139 /* get the packet length */
2140 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2141 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2142
2143 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2144 netif_dbg(dev, rx_err, dev->net,
2145 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2146 dev->net->stats.rx_errors++;
2147 dev->net->stats.rx_dropped++;
2148
2149 if (rx_cmd_a & RX_CMD_A_FCS)
2150 dev->net->stats.rx_crc_errors++;
2151 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2152 dev->net->stats.rx_frame_errors++;
2153 } else {
2154 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2155 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2156 netif_dbg(dev, rx_err, dev->net,
2157 "size err rx_cmd_a=0x%08x\n",
2158 rx_cmd_a);
2159 return 0;
2160 }
2161
2162 /* last frame in this batch */
2163 if (skb->len == size) {
2164 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2165 rx_cmd_b);
2166
2167 skb_trim(skb, skb->len - 4); /* remove fcs */
2168 skb->truesize = size + sizeof(struct sk_buff);
2169
2170 return 1;
2171 }
2172
2173 ax_skb = skb_clone(skb, GFP_ATOMIC);
2174 if (unlikely(!ax_skb)) {
2175 netdev_warn(dev->net, "Error allocating skb\n");
2176 return 0;
2177 }
2178
2179 ax_skb->len = size;
2180 ax_skb->data = packet;
2181 skb_set_tail_pointer(ax_skb, size);
2182
2183 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2184 rx_cmd_b);
2185
2186 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2187 ax_skb->truesize = size + sizeof(struct sk_buff);
2188
2189 usbnet_skb_return(dev, ax_skb);
2190 }
2191
2192 skb_pull(skb, size);
2193
2194 /* padding bytes before the next frame starts */
2195 if (skb->len)
2196 skb_pull(skb, align_count);
2197 }
2198
2199 return 1;
2200 }
2201
2202 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2203 struct sk_buff *skb, gfp_t flags)
2204 {
2205 u32 tx_cmd_a, tx_cmd_b;
2206
2207 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2208 dev_kfree_skb_any(skb);
2209 return NULL;
2210 }
2211
2212 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2213
2214 if (skb->ip_summed == CHECKSUM_PARTIAL)
2215 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2216
2217 if (skb_is_gso(skb)) {
2218 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2219 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2220
2221 tx_cmd_a |= TX_CMD_A_LSO;
2222 } else {
2223 tx_cmd_b = 0;
2224 }
2225
2226 skb_push(skb, 4);
2227 cpu_to_le32s(&tx_cmd_b);
2228 memcpy(skb->data, &tx_cmd_b, 4);
2229
2230 skb_push(skb, 4);
2231 cpu_to_le32s(&tx_cmd_a);
2232 memcpy(skb->data, &tx_cmd_a, 4);
2233
2234 return skb;
2235 }
2236
2237 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2238 {
2239 dev->intf->needs_remote_wakeup = on;
2240 return 0;
2241 }
2242
2243 static const struct driver_info smsc75xx_info = {
2244 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
2245 .bind = smsc75xx_bind,
2246 .unbind = smsc75xx_unbind,
2247 .link_reset = smsc75xx_link_reset,
2248 .reset = smsc75xx_reset,
2249 .rx_fixup = smsc75xx_rx_fixup,
2250 .tx_fixup = smsc75xx_tx_fixup,
2251 .status = smsc75xx_status,
2252 .manage_power = smsc75xx_manage_power,
2253 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2254 };
2255
2256 static const struct usb_device_id products[] = {
2257 {
2258 /* SMSC7500 USB Gigabit Ethernet Device */
2259 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2260 .driver_info = (unsigned long) &smsc75xx_info,
2261 },
2262 {
2263 /* SMSC7500 USB Gigabit Ethernet Device */
2264 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2265 .driver_info = (unsigned long) &smsc75xx_info,
2266 },
2267 { }, /* END */
2268 };
2269 MODULE_DEVICE_TABLE(usb, products);
2270
2271 static struct usb_driver smsc75xx_driver = {
2272 .name = SMSC_CHIPNAME,
2273 .id_table = products,
2274 .probe = usbnet_probe,
2275 .suspend = smsc75xx_suspend,
2276 .resume = smsc75xx_resume,
2277 .reset_resume = smsc75xx_resume,
2278 .disconnect = usbnet_disconnect,
2279 .disable_hub_initiated_lpm = 1,
2280 .supports_autosuspend = 1,
2281 };
2282
2283 module_usb_driver(smsc75xx_driver);
2284
2285 MODULE_AUTHOR("Nancy Lin");
2286 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2287 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2288 MODULE_LICENSE("GPL");
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