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fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / net / usb / smsc75xx.c
blobf17b9e02dd348166333d691a06b8b12b0a48a3e7
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 "smsc75xx.h"
33
34 #define SMSC_CHIPNAME "smsc75xx"
35 #define SMSC_DRIVER_VERSION "1.0.0"
36 #define HS_USB_PKT_SIZE (512)
37 #define FS_USB_PKT_SIZE (64)
38 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
39 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
40 #define DEFAULT_BULK_IN_DELAY (0x00002000)
41 #define MAX_SINGLE_PACKET_SIZE (9000)
42 #define LAN75XX_EEPROM_MAGIC (0x7500)
43 #define EEPROM_MAC_OFFSET (0x01)
44 #define DEFAULT_TX_CSUM_ENABLE (true)
45 #define DEFAULT_RX_CSUM_ENABLE (true)
46 #define SMSC75XX_INTERNAL_PHY_ID (1)
47 #define SMSC75XX_TX_OVERHEAD (8)
48 #define MAX_RX_FIFO_SIZE (20 * 1024)
49 #define MAX_TX_FIFO_SIZE (12 * 1024)
50 #define USB_VENDOR_ID_SMSC (0x0424)
51 #define USB_PRODUCT_ID_LAN7500 (0x7500)
52 #define USB_PRODUCT_ID_LAN7505 (0x7505)
53 #define RXW_PADDING 2
54 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
55 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
56
57 #define SUSPEND_SUSPEND0 (0x01)
58 #define SUSPEND_SUSPEND1 (0x02)
59 #define SUSPEND_SUSPEND2 (0x04)
60 #define SUSPEND_SUSPEND3 (0x08)
61 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
62 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
63
64 struct smsc75xx_priv {
65 struct usbnet *dev;
66 u32 rfe_ctl;
67 u32 wolopts;
68 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
69 struct mutex dataport_mutex;
70 spinlock_t rfe_ctl_lock;
71 struct work_struct set_multicast;
72 u8 suspend_flags;
73 };
74
75 struct usb_context {
76 struct usb_ctrlrequest req;
77 struct usbnet *dev;
78 };
79
80 static bool turbo_mode = true;
81 module_param(turbo_mode, bool, 0644);
82 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
83
84 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
85 u32 *data, int in_pm)
86 {
87 u32 buf;
88 int ret;
89 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
90
91 BUG_ON(!dev);
92
93 if (!in_pm)
94 fn = usbnet_read_cmd;
95 else
96 fn = usbnet_read_cmd_nopm;
97
98 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
99 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
100 0, index, &buf, 4);
101 if (unlikely(ret < 0))
102 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
103 index, ret);
104
105 le32_to_cpus(&buf);
106 *data = buf;
107
108 return ret;
109 }
110
111 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
112 u32 data, int in_pm)
113 {
114 u32 buf;
115 int ret;
116 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
117
118 BUG_ON(!dev);
119
120 if (!in_pm)
121 fn = usbnet_write_cmd;
122 else
123 fn = usbnet_write_cmd_nopm;
124
125 buf = data;
126 cpu_to_le32s(&buf);
127
128 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
129 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
130 0, index, &buf, 4);
131 if (unlikely(ret < 0))
132 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
133 index, ret);
134
135 return ret;
136 }
137
138 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
139 u32 *data)
140 {
141 return __smsc75xx_read_reg(dev, index, data, 1);
142 }
143
144 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
145 u32 data)
146 {
147 return __smsc75xx_write_reg(dev, index, data, 1);
148 }
149
150 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
151 u32 *data)
152 {
153 return __smsc75xx_read_reg(dev, index, data, 0);
154 }
155
156 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
157 u32 data)
158 {
159 return __smsc75xx_write_reg(dev, index, data, 0);
160 }
161
162 /* Loop until the read is completed with timeout
163 * called with phy_mutex held */
164 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
165 int in_pm)
166 {
167 unsigned long start_time = jiffies;
168 u32 val;
169 int ret;
170
171 do {
172 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
173 if (ret < 0) {
174 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
175 return ret;
176 }
177
178 if (!(val & MII_ACCESS_BUSY))
179 return 0;
180 } while (!time_after(jiffies, start_time + HZ));
181
182 return -EIO;
183 }
184
185 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
186 int in_pm)
187 {
188 struct usbnet *dev = netdev_priv(netdev);
189 u32 val, addr;
190 int ret;
191
192 mutex_lock(&dev->phy_mutex);
193
194 /* confirm MII not busy */
195 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
196 if (ret < 0) {
197 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
198 goto done;
199 }
200
201 /* set the address, index & direction (read from PHY) */
202 phy_id &= dev->mii.phy_id_mask;
203 idx &= dev->mii.reg_num_mask;
204 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
205 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
206 | MII_ACCESS_READ | MII_ACCESS_BUSY;
207 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
208 if (ret < 0) {
209 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
210 goto done;
211 }
212
213 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
214 if (ret < 0) {
215 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
216 goto done;
217 }
218
219 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
220 if (ret < 0) {
221 netdev_warn(dev->net, "Error reading MII_DATA\n");
222 goto done;
223 }
224
225 ret = (u16)(val & 0xFFFF);
226
227 done:
228 mutex_unlock(&dev->phy_mutex);
229 return ret;
230 }
231
232 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
233 int idx, int regval, int in_pm)
234 {
235 struct usbnet *dev = netdev_priv(netdev);
236 u32 val, addr;
237 int ret;
238
239 mutex_lock(&dev->phy_mutex);
240
241 /* confirm MII not busy */
242 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
243 if (ret < 0) {
244 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
245 goto done;
246 }
247
248 val = regval;
249 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
250 if (ret < 0) {
251 netdev_warn(dev->net, "Error writing MII_DATA\n");
252 goto done;
253 }
254
255 /* set the address, index & direction (write to PHY) */
256 phy_id &= dev->mii.phy_id_mask;
257 idx &= dev->mii.reg_num_mask;
258 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
259 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
260 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
261 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
262 if (ret < 0) {
263 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
264 goto done;
265 }
266
267 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
268 if (ret < 0) {
269 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
270 goto done;
271 }
272
273 done:
274 mutex_unlock(&dev->phy_mutex);
275 }
276
277 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
278 int idx)
279 {
280 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
281 }
282
283 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
284 int idx, int regval)
285 {
286 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
287 }
288
289 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
290 {
291 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
292 }
293
294 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
295 int regval)
296 {
297 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
298 }
299
300 static int smsc75xx_wait_eeprom(struct usbnet *dev)
301 {
302 unsigned long start_time = jiffies;
303 u32 val;
304 int ret;
305
306 do {
307 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
308 if (ret < 0) {
309 netdev_warn(dev->net, "Error reading E2P_CMD\n");
310 return ret;
311 }
312
313 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
314 break;
315 udelay(40);
316 } while (!time_after(jiffies, start_time + HZ));
317
318 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
319 netdev_warn(dev->net, "EEPROM read operation timeout\n");
320 return -EIO;
321 }
322
323 return 0;
324 }
325
326 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
327 {
328 unsigned long start_time = jiffies;
329 u32 val;
330 int ret;
331
332 do {
333 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
334 if (ret < 0) {
335 netdev_warn(dev->net, "Error reading E2P_CMD\n");
336 return ret;
337 }
338
339 if (!(val & E2P_CMD_BUSY))
340 return 0;
341
342 udelay(40);
343 } while (!time_after(jiffies, start_time + HZ));
344
345 netdev_warn(dev->net, "EEPROM is busy\n");
346 return -EIO;
347 }
348
349 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
350 u8 *data)
351 {
352 u32 val;
353 int i, ret;
354
355 BUG_ON(!dev);
356 BUG_ON(!data);
357
358 ret = smsc75xx_eeprom_confirm_not_busy(dev);
359 if (ret)
360 return ret;
361
362 for (i = 0; i < length; i++) {
363 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
364 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
365 if (ret < 0) {
366 netdev_warn(dev->net, "Error writing E2P_CMD\n");
367 return ret;
368 }
369
370 ret = smsc75xx_wait_eeprom(dev);
371 if (ret < 0)
372 return ret;
373
374 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
375 if (ret < 0) {
376 netdev_warn(dev->net, "Error reading E2P_DATA\n");
377 return ret;
378 }
379
380 data[i] = val & 0xFF;
381 offset++;
382 }
383
384 return 0;
385 }
386
387 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
388 u8 *data)
389 {
390 u32 val;
391 int i, ret;
392
393 BUG_ON(!dev);
394 BUG_ON(!data);
395
396 ret = smsc75xx_eeprom_confirm_not_busy(dev);
397 if (ret)
398 return ret;
399
400 /* Issue write/erase enable command */
401 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
402 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
403 if (ret < 0) {
404 netdev_warn(dev->net, "Error writing E2P_CMD\n");
405 return ret;
406 }
407
408 ret = smsc75xx_wait_eeprom(dev);
409 if (ret < 0)
410 return ret;
411
412 for (i = 0; i < length; i++) {
413
414 /* Fill data register */
415 val = data[i];
416 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
417 if (ret < 0) {
418 netdev_warn(dev->net, "Error writing E2P_DATA\n");
419 return ret;
420 }
421
422 /* Send "write" command */
423 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
424 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
425 if (ret < 0) {
426 netdev_warn(dev->net, "Error writing E2P_CMD\n");
427 return ret;
428 }
429
430 ret = smsc75xx_wait_eeprom(dev);
431 if (ret < 0)
432 return ret;
433
434 offset++;
435 }
436
437 return 0;
438 }
439
440 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
441 {
442 int i, ret;
443
444 for (i = 0; i < 100; i++) {
445 u32 dp_sel;
446 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
447 if (ret < 0) {
448 netdev_warn(dev->net, "Error reading DP_SEL\n");
449 return ret;
450 }
451
452 if (dp_sel & DP_SEL_DPRDY)
453 return 0;
454
455 udelay(40);
456 }
457
458 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
459
460 return -EIO;
461 }
462
463 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
464 u32 length, u32 *buf)
465 {
466 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
467 u32 dp_sel;
468 int i, ret;
469
470 mutex_lock(&pdata->dataport_mutex);
471
472 ret = smsc75xx_dataport_wait_not_busy(dev);
473 if (ret < 0) {
474 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
475 goto done;
476 }
477
478 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
479 if (ret < 0) {
480 netdev_warn(dev->net, "Error reading DP_SEL\n");
481 goto done;
482 }
483
484 dp_sel &= ~DP_SEL_RSEL;
485 dp_sel |= ram_select;
486 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
487 if (ret < 0) {
488 netdev_warn(dev->net, "Error writing DP_SEL\n");
489 goto done;
490 }
491
492 for (i = 0; i < length; i++) {
493 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
494 if (ret < 0) {
495 netdev_warn(dev->net, "Error writing DP_ADDR\n");
496 goto done;
497 }
498
499 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
500 if (ret < 0) {
501 netdev_warn(dev->net, "Error writing DP_DATA\n");
502 goto done;
503 }
504
505 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
506 if (ret < 0) {
507 netdev_warn(dev->net, "Error writing DP_CMD\n");
508 goto done;
509 }
510
511 ret = smsc75xx_dataport_wait_not_busy(dev);
512 if (ret < 0) {
513 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
514 goto done;
515 }
516 }
517
518 done:
519 mutex_unlock(&pdata->dataport_mutex);
520 return ret;
521 }
522
523 /* returns hash bit number for given MAC address */
524 static u32 smsc75xx_hash(char addr[ETH_ALEN])
525 {
526 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
527 }
528
529 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
530 {
531 struct smsc75xx_priv *pdata =
532 container_of(param, struct smsc75xx_priv, set_multicast);
533 struct usbnet *dev = pdata->dev;
534 int ret;
535
536 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
537 pdata->rfe_ctl);
538
539 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
540 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
541
542 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
543 if (ret < 0)
544 netdev_warn(dev->net, "Error writing RFE_CRL\n");
545 }
546
547 static void smsc75xx_set_multicast(struct net_device *netdev)
548 {
549 struct usbnet *dev = netdev_priv(netdev);
550 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
551 unsigned long flags;
552 int i;
553
554 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
555
556 pdata->rfe_ctl &=
557 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
558 pdata->rfe_ctl |= RFE_CTL_AB;
559
560 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
561 pdata->multicast_hash_table[i] = 0;
562
563 if (dev->net->flags & IFF_PROMISC) {
564 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
565 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
566 } else if (dev->net->flags & IFF_ALLMULTI) {
567 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
568 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
569 } else if (!netdev_mc_empty(dev->net)) {
570 struct netdev_hw_addr *ha;
571
572 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
573
574 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
575
576 netdev_for_each_mc_addr(ha, netdev) {
577 u32 bitnum = smsc75xx_hash(ha->addr);
578 pdata->multicast_hash_table[bitnum / 32] |=
579 (1 << (bitnum % 32));
580 }
581 } else {
582 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
583 pdata->rfe_ctl |= RFE_CTL_DPF;
584 }
585
586 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
587
588 /* defer register writes to a sleepable context */
589 schedule_work(&pdata->set_multicast);
590 }
591
592 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
593 u16 lcladv, u16 rmtadv)
594 {
595 u32 flow = 0, fct_flow = 0;
596 int ret;
597
598 if (duplex == DUPLEX_FULL) {
599 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
600
601 if (cap & FLOW_CTRL_TX) {
602 flow = (FLOW_TX_FCEN | 0xFFFF);
603 /* set fct_flow thresholds to 20% and 80% */
604 fct_flow = (8 << 8) | 32;
605 }
606
607 if (cap & FLOW_CTRL_RX)
608 flow |= FLOW_RX_FCEN;
609
610 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
611 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
612 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
613 } else {
614 netif_dbg(dev, link, dev->net, "half duplex\n");
615 }
616
617 ret = smsc75xx_write_reg(dev, FLOW, flow);
618 if (ret < 0) {
619 netdev_warn(dev->net, "Error writing FLOW\n");
620 return ret;
621 }
622
623 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
624 if (ret < 0) {
625 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
626 return ret;
627 }
628
629 return 0;
630 }
631
632 static int smsc75xx_link_reset(struct usbnet *dev)
633 {
634 struct mii_if_info *mii = &dev->mii;
635 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
636 u16 lcladv, rmtadv;
637 int ret;
638
639 /* write to clear phy interrupt status */
640 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
641 PHY_INT_SRC_CLEAR_ALL);
642
643 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
644 if (ret < 0) {
645 netdev_warn(dev->net, "Error writing INT_STS\n");
646 return ret;
647 }
648
649 mii_check_media(mii, 1, 1);
650 mii_ethtool_gset(&dev->mii, &ecmd);
651 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
652 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
653
654 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
655 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
656
657 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
658 }
659
660 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
661 {
662 u32 intdata;
663
664 if (urb->actual_length != 4) {
665 netdev_warn(dev->net, "unexpected urb length %d\n",
666 urb->actual_length);
667 return;
668 }
669
670 memcpy(&intdata, urb->transfer_buffer, 4);
671 le32_to_cpus(&intdata);
672
673 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
674
675 if (intdata & INT_ENP_PHY_INT)
676 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
677 else
678 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
679 intdata);
680 }
681
682 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
683 {
684 return MAX_EEPROM_SIZE;
685 }
686
687 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
688 struct ethtool_eeprom *ee, u8 *data)
689 {
690 struct usbnet *dev = netdev_priv(netdev);
691
692 ee->magic = LAN75XX_EEPROM_MAGIC;
693
694 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
695 }
696
697 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
698 struct ethtool_eeprom *ee, u8 *data)
699 {
700 struct usbnet *dev = netdev_priv(netdev);
701
702 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
703 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
704 ee->magic);
705 return -EINVAL;
706 }
707
708 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
709 }
710
711 static void smsc75xx_ethtool_get_wol(struct net_device *net,
712 struct ethtool_wolinfo *wolinfo)
713 {
714 struct usbnet *dev = netdev_priv(net);
715 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
716
717 wolinfo->supported = SUPPORTED_WAKE;
718 wolinfo->wolopts = pdata->wolopts;
719 }
720
721 static int smsc75xx_ethtool_set_wol(struct net_device *net,
722 struct ethtool_wolinfo *wolinfo)
723 {
724 struct usbnet *dev = netdev_priv(net);
725 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
726 int ret;
727
728 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
729
730 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
731 if (ret < 0)
732 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
733
734 return ret;
735 }
736
737 static const struct ethtool_ops smsc75xx_ethtool_ops = {
738 .get_link = usbnet_get_link,
739 .nway_reset = usbnet_nway_reset,
740 .get_drvinfo = usbnet_get_drvinfo,
741 .get_msglevel = usbnet_get_msglevel,
742 .set_msglevel = usbnet_set_msglevel,
743 .get_settings = usbnet_get_settings,
744 .set_settings = usbnet_set_settings,
745 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
746 .get_eeprom = smsc75xx_ethtool_get_eeprom,
747 .set_eeprom = smsc75xx_ethtool_set_eeprom,
748 .get_wol = smsc75xx_ethtool_get_wol,
749 .set_wol = smsc75xx_ethtool_set_wol,
750 };
751
752 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
753 {
754 struct usbnet *dev = netdev_priv(netdev);
755
756 if (!netif_running(netdev))
757 return -EINVAL;
758
759 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
760 }
761
762 static void smsc75xx_init_mac_address(struct usbnet *dev)
763 {
764 /* try reading mac address from EEPROM */
765 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
766 dev->net->dev_addr) == 0) {
767 if (is_valid_ether_addr(dev->net->dev_addr)) {
768 /* eeprom values are valid so use them */
769 netif_dbg(dev, ifup, dev->net,
770 "MAC address read from EEPROM\n");
771 return;
772 }
773 }
774
775 /* no eeprom, or eeprom values are invalid. generate random MAC */
776 eth_hw_addr_random(dev->net);
777 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
778 }
779
780 static int smsc75xx_set_mac_address(struct usbnet *dev)
781 {
782 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
783 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
784 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
785
786 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
787 if (ret < 0) {
788 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
789 return ret;
790 }
791
792 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
793 if (ret < 0) {
794 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
795 return ret;
796 }
797
798 addr_hi |= ADDR_FILTX_FB_VALID;
799 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
800 if (ret < 0) {
801 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
802 return ret;
803 }
804
805 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
806 if (ret < 0)
807 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
808
809 return ret;
810 }
811
812 static int smsc75xx_phy_initialize(struct usbnet *dev)
813 {
814 int bmcr, ret, timeout = 0;
815
816 /* Initialize MII structure */
817 dev->mii.dev = dev->net;
818 dev->mii.mdio_read = smsc75xx_mdio_read;
819 dev->mii.mdio_write = smsc75xx_mdio_write;
820 dev->mii.phy_id_mask = 0x1f;
821 dev->mii.reg_num_mask = 0x1f;
822 dev->mii.supports_gmii = 1;
823 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
824
825 /* reset phy and wait for reset to complete */
826 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
827
828 do {
829 msleep(10);
830 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
831 if (bmcr < 0) {
832 netdev_warn(dev->net, "Error reading MII_BMCR\n");
833 return bmcr;
834 }
835 timeout++;
836 } while ((bmcr & BMCR_RESET) && (timeout < 100));
837
838 if (timeout >= 100) {
839 netdev_warn(dev->net, "timeout on PHY Reset\n");
840 return -EIO;
841 }
842
843 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
844 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
845 ADVERTISE_PAUSE_ASYM);
846 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
847 ADVERTISE_1000FULL);
848
849 /* read and write to clear phy interrupt status */
850 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
851 if (ret < 0) {
852 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
853 return ret;
854 }
855
856 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
857
858 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
859 PHY_INT_MASK_DEFAULT);
860 mii_nway_restart(&dev->mii);
861
862 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
863 return 0;
864 }
865
866 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
867 {
868 int ret = 0;
869 u32 buf;
870 bool rxenabled;
871
872 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
873 if (ret < 0) {
874 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
875 return ret;
876 }
877
878 rxenabled = ((buf & MAC_RX_RXEN) != 0);
879
880 if (rxenabled) {
881 buf &= ~MAC_RX_RXEN;
882 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
883 if (ret < 0) {
884 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
885 return ret;
886 }
887 }
888
889 /* add 4 to size for FCS */
890 buf &= ~MAC_RX_MAX_SIZE;
891 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
892
893 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
894 if (ret < 0) {
895 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
896 return ret;
897 }
898
899 if (rxenabled) {
900 buf |= MAC_RX_RXEN;
901 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
902 if (ret < 0) {
903 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
904 return ret;
905 }
906 }
907
908 return 0;
909 }
910
911 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
912 {
913 struct usbnet *dev = netdev_priv(netdev);
914 int ret;
915
916 if (new_mtu > MAX_SINGLE_PACKET_SIZE)
917 return -EINVAL;
918
919 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
920 if (ret < 0) {
921 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
922 return ret;
923 }
924
925 return usbnet_change_mtu(netdev, new_mtu);
926 }
927
928 /* Enable or disable Rx checksum offload engine */
929 static int smsc75xx_set_features(struct net_device *netdev,
930 netdev_features_t features)
931 {
932 struct usbnet *dev = netdev_priv(netdev);
933 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
934 unsigned long flags;
935 int ret;
936
937 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
938
939 if (features & NETIF_F_RXCSUM)
940 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
941 else
942 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
943
944 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
945 /* it's racing here! */
946
947 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
948 if (ret < 0)
949 netdev_warn(dev->net, "Error writing RFE_CTL\n");
950
951 return ret;
952 }
953
954 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
955 {
956 int timeout = 0;
957
958 do {
959 u32 buf;
960 int ret;
961
962 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
963
964 if (ret < 0) {
965 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
966 return ret;
967 }
968
969 if (buf & PMT_CTL_DEV_RDY)
970 return 0;
971
972 msleep(10);
973 timeout++;
974 } while (timeout < 100);
975
976 netdev_warn(dev->net, "timeout waiting for device ready\n");
977 return -EIO;
978 }
979
980 static int smsc75xx_reset(struct usbnet *dev)
981 {
982 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
983 u32 buf;
984 int ret = 0, timeout;
985
986 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
987
988 ret = smsc75xx_wait_ready(dev, 0);
989 if (ret < 0) {
990 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
991 return ret;
992 }
993
994 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
995 if (ret < 0) {
996 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
997 return ret;
998 }
999
1000 buf |= HW_CFG_LRST;
1001
1002 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1003 if (ret < 0) {
1004 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1005 return ret;
1006 }
1007
1008 timeout = 0;
1009 do {
1010 msleep(10);
1011 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1012 if (ret < 0) {
1013 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1014 return ret;
1015 }
1016 timeout++;
1017 } while ((buf & HW_CFG_LRST) && (timeout < 100));
1018
1019 if (timeout >= 100) {
1020 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1021 return -EIO;
1022 }
1023
1024 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1025
1026 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1027 if (ret < 0) {
1028 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1029 return ret;
1030 }
1031
1032 buf |= PMT_CTL_PHY_RST;
1033
1034 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1035 if (ret < 0) {
1036 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1037 return ret;
1038 }
1039
1040 timeout = 0;
1041 do {
1042 msleep(10);
1043 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1044 if (ret < 0) {
1045 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1046 return ret;
1047 }
1048 timeout++;
1049 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1050
1051 if (timeout >= 100) {
1052 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1053 return -EIO;
1054 }
1055
1056 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1057
1058 ret = smsc75xx_set_mac_address(dev);
1059 if (ret < 0) {
1060 netdev_warn(dev->net, "Failed to set mac address\n");
1061 return ret;
1062 }
1063
1064 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1065 dev->net->dev_addr);
1066
1067 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1068 if (ret < 0) {
1069 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1070 return ret;
1071 }
1072
1073 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1074 buf);
1075
1076 buf |= HW_CFG_BIR;
1077
1078 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1079 if (ret < 0) {
1080 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1081 return ret;
1082 }
1083
1084 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1085 if (ret < 0) {
1086 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1087 return ret;
1088 }
1089
1090 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1091 buf);
1092
1093 if (!turbo_mode) {
1094 buf = 0;
1095 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1096 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1097 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1098 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1099 } else {
1100 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1101 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1102 }
1103
1104 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1105 (ulong)dev->rx_urb_size);
1106
1107 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1108 if (ret < 0) {
1109 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1110 return ret;
1111 }
1112
1113 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1114 if (ret < 0) {
1115 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1116 return ret;
1117 }
1118
1119 netif_dbg(dev, ifup, dev->net,
1120 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1121
1122 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1123 if (ret < 0) {
1124 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1125 return ret;
1126 }
1127
1128 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1129 if (ret < 0) {
1130 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1131 return ret;
1132 }
1133
1134 netif_dbg(dev, ifup, dev->net,
1135 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1136
1137 if (turbo_mode) {
1138 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1139 if (ret < 0) {
1140 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1141 return ret;
1142 }
1143
1144 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1145
1146 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1147
1148 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1149 if (ret < 0) {
1150 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1151 return ret;
1152 }
1153
1154 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1155 if (ret < 0) {
1156 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1157 return ret;
1158 }
1159
1160 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1161 }
1162
1163 /* set FIFO sizes */
1164 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1165 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1166 if (ret < 0) {
1167 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1168 return ret;
1169 }
1170
1171 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1172
1173 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1174 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1175 if (ret < 0) {
1176 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1177 return ret;
1178 }
1179
1180 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1181
1182 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1183 if (ret < 0) {
1184 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1185 return ret;
1186 }
1187
1188 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1189 if (ret < 0) {
1190 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1191 return ret;
1192 }
1193
1194 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1195
1196 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1197 if (ret < 0) {
1198 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1199 return ret;
1200 }
1201
1202 /* only set default GPIO/LED settings if no EEPROM is detected */
1203 if (!(buf & E2P_CMD_LOADED)) {
1204 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1205 if (ret < 0) {
1206 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1207 return ret;
1208 }
1209
1210 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1211 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1212
1213 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1214 if (ret < 0) {
1215 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1216 return ret;
1217 }
1218 }
1219
1220 ret = smsc75xx_write_reg(dev, FLOW, 0);
1221 if (ret < 0) {
1222 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1223 return ret;
1224 }
1225
1226 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1227 if (ret < 0) {
1228 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1229 return ret;
1230 }
1231
1232 /* Don't need rfe_ctl_lock during initialisation */
1233 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1234 if (ret < 0) {
1235 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1236 return ret;
1237 }
1238
1239 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1240
1241 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1242 if (ret < 0) {
1243 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1244 return ret;
1245 }
1246
1247 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1248 if (ret < 0) {
1249 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1250 return ret;
1251 }
1252
1253 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1254 pdata->rfe_ctl);
1255
1256 /* Enable or disable checksum offload engines */
1257 smsc75xx_set_features(dev->net, dev->net->features);
1258
1259 smsc75xx_set_multicast(dev->net);
1260
1261 ret = smsc75xx_phy_initialize(dev);
1262 if (ret < 0) {
1263 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1264 return ret;
1265 }
1266
1267 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1268 if (ret < 0) {
1269 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1270 return ret;
1271 }
1272
1273 /* enable PHY interrupts */
1274 buf |= INT_ENP_PHY_INT;
1275
1276 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1277 if (ret < 0) {
1278 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1279 return ret;
1280 }
1281
1282 /* allow mac to detect speed and duplex from phy */
1283 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1284 if (ret < 0) {
1285 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1286 return ret;
1287 }
1288
1289 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1290 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1291 if (ret < 0) {
1292 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1293 return ret;
1294 }
1295
1296 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1297 if (ret < 0) {
1298 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1299 return ret;
1300 }
1301
1302 buf |= MAC_TX_TXEN;
1303
1304 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1305 if (ret < 0) {
1306 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1307 return ret;
1308 }
1309
1310 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1311
1312 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1313 if (ret < 0) {
1314 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1315 return ret;
1316 }
1317
1318 buf |= FCT_TX_CTL_EN;
1319
1320 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1321 if (ret < 0) {
1322 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1323 return ret;
1324 }
1325
1326 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1327
1328 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1329 if (ret < 0) {
1330 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1331 return ret;
1332 }
1333
1334 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1335 if (ret < 0) {
1336 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1337 return ret;
1338 }
1339
1340 buf |= MAC_RX_RXEN;
1341
1342 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1343 if (ret < 0) {
1344 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1345 return ret;
1346 }
1347
1348 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1349
1350 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1351 if (ret < 0) {
1352 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1353 return ret;
1354 }
1355
1356 buf |= FCT_RX_CTL_EN;
1357
1358 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1359 if (ret < 0) {
1360 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1361 return ret;
1362 }
1363
1364 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1365
1366 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1367 return 0;
1368 }
1369
1370 static const struct net_device_ops smsc75xx_netdev_ops = {
1371 .ndo_open = usbnet_open,
1372 .ndo_stop = usbnet_stop,
1373 .ndo_start_xmit = usbnet_start_xmit,
1374 .ndo_tx_timeout = usbnet_tx_timeout,
1375 .ndo_change_mtu = smsc75xx_change_mtu,
1376 .ndo_set_mac_address = eth_mac_addr,
1377 .ndo_validate_addr = eth_validate_addr,
1378 .ndo_do_ioctl = smsc75xx_ioctl,
1379 .ndo_set_rx_mode = smsc75xx_set_multicast,
1380 .ndo_set_features = smsc75xx_set_features,
1381 };
1382
1383 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1384 {
1385 struct smsc75xx_priv *pdata = NULL;
1386 int ret;
1387
1388 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1389
1390 ret = usbnet_get_endpoints(dev, intf);
1391 if (ret < 0) {
1392 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1393 return ret;
1394 }
1395
1396 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1397 GFP_KERNEL);
1398
1399 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1400 if (!pdata)
1401 return -ENOMEM;
1402
1403 pdata->dev = dev;
1404
1405 spin_lock_init(&pdata->rfe_ctl_lock);
1406 mutex_init(&pdata->dataport_mutex);
1407
1408 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1409
1410 if (DEFAULT_TX_CSUM_ENABLE)
1411 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1412
1413 if (DEFAULT_RX_CSUM_ENABLE)
1414 dev->net->features |= NETIF_F_RXCSUM;
1415
1416 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1417 NETIF_F_RXCSUM;
1418
1419 ret = smsc75xx_wait_ready(dev, 0);
1420 if (ret < 0) {
1421 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1422 return ret;
1423 }
1424
1425 smsc75xx_init_mac_address(dev);
1426
1427 /* Init all registers */
1428 ret = smsc75xx_reset(dev);
1429 if (ret < 0) {
1430 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1431 return ret;
1432 }
1433
1434 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1435 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1436 dev->net->flags |= IFF_MULTICAST;
1437 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1438 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1439 return 0;
1440 }
1441
1442 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1443 {
1444 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1445 if (pdata) {
1446 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1447 kfree(pdata);
1448 pdata = NULL;
1449 dev->data[0] = 0;
1450 }
1451 }
1452
1453 static u16 smsc_crc(const u8 *buffer, size_t len)
1454 {
1455 return bitrev16(crc16(0xFFFF, buffer, len));
1456 }
1457
1458 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1459 u32 wuf_mask1)
1460 {
1461 int cfg_base = WUF_CFGX + filter * 4;
1462 int mask_base = WUF_MASKX + filter * 16;
1463 int ret;
1464
1465 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1466 if (ret < 0) {
1467 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1468 return ret;
1469 }
1470
1471 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1472 if (ret < 0) {
1473 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1474 return ret;
1475 }
1476
1477 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1478 if (ret < 0) {
1479 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1480 return ret;
1481 }
1482
1483 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1484 if (ret < 0) {
1485 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1486 return ret;
1487 }
1488
1489 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1490 if (ret < 0) {
1491 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1492 return ret;
1493 }
1494
1495 return 0;
1496 }
1497
1498 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1499 {
1500 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1501 u32 val;
1502 int ret;
1503
1504 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1505 if (ret < 0) {
1506 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1507 return ret;
1508 }
1509
1510 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1511 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1512
1513 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1514 if (ret < 0) {
1515 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1516 return ret;
1517 }
1518
1519 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1520
1521 return 0;
1522 }
1523
1524 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1525 {
1526 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1527 u32 val;
1528 int ret;
1529
1530 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1531 if (ret < 0) {
1532 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1533 return ret;
1534 }
1535
1536 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1537 val |= PMT_CTL_SUS_MODE_1;
1538
1539 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1540 if (ret < 0) {
1541 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1542 return ret;
1543 }
1544
1545 /* clear wol status, enable energy detection */
1546 val &= ~PMT_CTL_WUPS;
1547 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1548
1549 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1550 if (ret < 0) {
1551 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1552 return ret;
1553 }
1554
1555 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1556
1557 return 0;
1558 }
1559
1560 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1561 {
1562 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1563 u32 val;
1564 int ret;
1565
1566 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1567 if (ret < 0) {
1568 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1569 return ret;
1570 }
1571
1572 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1573 val |= PMT_CTL_SUS_MODE_2;
1574
1575 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1576 if (ret < 0) {
1577 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1578 return ret;
1579 }
1580
1581 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1582
1583 return 0;
1584 }
1585
1586 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1587 {
1588 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1589 u32 val;
1590 int ret;
1591
1592 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1593 if (ret < 0) {
1594 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1595 return ret;
1596 }
1597
1598 if (val & FCT_RX_CTL_RXUSED) {
1599 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1600 return -EBUSY;
1601 }
1602
1603 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1604 if (ret < 0) {
1605 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1606 return ret;
1607 }
1608
1609 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1610 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1611
1612 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1613 if (ret < 0) {
1614 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1615 return ret;
1616 }
1617
1618 /* clear wol status */
1619 val &= ~PMT_CTL_WUPS;
1620 val |= PMT_CTL_WUPS_WOL;
1621
1622 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1623 if (ret < 0) {
1624 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1625 return ret;
1626 }
1627
1628 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1629
1630 return 0;
1631 }
1632
1633 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1634 {
1635 struct mii_if_info *mii = &dev->mii;
1636 int ret;
1637
1638 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1639
1640 /* read to clear */
1641 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1642 if (ret < 0) {
1643 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1644 return ret;
1645 }
1646
1647 /* enable interrupt source */
1648 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1649 if (ret < 0) {
1650 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1651 return ret;
1652 }
1653
1654 ret |= mask;
1655
1656 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1657
1658 return 0;
1659 }
1660
1661 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1662 {
1663 struct mii_if_info *mii = &dev->mii;
1664 int ret;
1665
1666 /* first, a dummy read, needed to latch some MII phys */
1667 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1668 if (ret < 0) {
1669 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1670 return ret;
1671 }
1672
1673 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1674 if (ret < 0) {
1675 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1676 return ret;
1677 }
1678
1679 return !!(ret & BMSR_LSTATUS);
1680 }
1681
1682 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1683 {
1684 int ret;
1685
1686 if (!netif_running(dev->net)) {
1687 /* interface is ifconfig down so fully power down hw */
1688 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1689 return smsc75xx_enter_suspend2(dev);
1690 }
1691
1692 if (!link_up) {
1693 /* link is down so enter EDPD mode */
1694 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1695
1696 /* enable PHY wakeup events for if cable is attached */
1697 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1698 PHY_INT_MASK_ANEG_COMP);
1699 if (ret < 0) {
1700 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1701 return ret;
1702 }
1703
1704 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1705 return smsc75xx_enter_suspend1(dev);
1706 }
1707
1708 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1709 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1710 PHY_INT_MASK_LINK_DOWN);
1711 if (ret < 0) {
1712 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1713 return ret;
1714 }
1715
1716 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1717 return smsc75xx_enter_suspend3(dev);
1718 }
1719
1720 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1721 {
1722 struct usbnet *dev = usb_get_intfdata(intf);
1723 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1724 u32 val, link_up;
1725 int ret;
1726
1727 ret = usbnet_suspend(intf, message);
1728 if (ret < 0) {
1729 netdev_warn(dev->net, "usbnet_suspend error\n");
1730 return ret;
1731 }
1732
1733 if (pdata->suspend_flags) {
1734 netdev_warn(dev->net, "error during last resume\n");
1735 pdata->suspend_flags = 0;
1736 }
1737
1738 /* determine if link is up using only _nopm functions */
1739 link_up = smsc75xx_link_ok_nopm(dev);
1740
1741 if (message.event == PM_EVENT_AUTO_SUSPEND) {
1742 ret = smsc75xx_autosuspend(dev, link_up);
1743 goto done;
1744 }
1745
1746 /* if we get this far we're not autosuspending */
1747 /* if no wol options set, or if link is down and we're not waking on
1748 * PHY activity, enter lowest power SUSPEND2 mode
1749 */
1750 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1751 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1752 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1753
1754 /* disable energy detect (link up) & wake up events */
1755 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1756 if (ret < 0) {
1757 netdev_warn(dev->net, "Error reading WUCSR\n");
1758 goto done;
1759 }
1760
1761 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1762
1763 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1764 if (ret < 0) {
1765 netdev_warn(dev->net, "Error writing WUCSR\n");
1766 goto done;
1767 }
1768
1769 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1770 if (ret < 0) {
1771 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1772 goto done;
1773 }
1774
1775 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1776
1777 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1778 if (ret < 0) {
1779 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1780 goto done;
1781 }
1782
1783 ret = smsc75xx_enter_suspend2(dev);
1784 goto done;
1785 }
1786
1787 if (pdata->wolopts & WAKE_PHY) {
1788 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1789 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1790 if (ret < 0) {
1791 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1792 goto done;
1793 }
1794
1795 /* if link is down then configure EDPD and enter SUSPEND1,
1796 * otherwise enter SUSPEND0 below
1797 */
1798 if (!link_up) {
1799 struct mii_if_info *mii = &dev->mii;
1800 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1801
1802 /* enable energy detect power-down mode */
1803 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1804 PHY_MODE_CTRL_STS);
1805 if (ret < 0) {
1806 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1807 goto done;
1808 }
1809
1810 ret |= MODE_CTRL_STS_EDPWRDOWN;
1811
1812 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1813 PHY_MODE_CTRL_STS, ret);
1814
1815 /* enter SUSPEND1 mode */
1816 ret = smsc75xx_enter_suspend1(dev);
1817 goto done;
1818 }
1819 }
1820
1821 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1822 int i, filter = 0;
1823
1824 /* disable all filters */
1825 for (i = 0; i < WUF_NUM; i++) {
1826 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1827 if (ret < 0) {
1828 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1829 goto done;
1830 }
1831 }
1832
1833 if (pdata->wolopts & WAKE_MCAST) {
1834 const u8 mcast[] = {0x01, 0x00, 0x5E};
1835 netdev_info(dev->net, "enabling multicast detection\n");
1836
1837 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1838 | smsc_crc(mcast, 3);
1839 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1840 if (ret < 0) {
1841 netdev_warn(dev->net, "Error writing wakeup filter\n");
1842 goto done;
1843 }
1844 }
1845
1846 if (pdata->wolopts & WAKE_ARP) {
1847 const u8 arp[] = {0x08, 0x06};
1848 netdev_info(dev->net, "enabling ARP detection\n");
1849
1850 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1851 | smsc_crc(arp, 2);
1852 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1853 if (ret < 0) {
1854 netdev_warn(dev->net, "Error writing wakeup filter\n");
1855 goto done;
1856 }
1857 }
1858
1859 /* clear any pending pattern match packet status */
1860 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1861 if (ret < 0) {
1862 netdev_warn(dev->net, "Error reading WUCSR\n");
1863 goto done;
1864 }
1865
1866 val |= WUCSR_WUFR;
1867
1868 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1869 if (ret < 0) {
1870 netdev_warn(dev->net, "Error writing WUCSR\n");
1871 goto done;
1872 }
1873
1874 netdev_info(dev->net, "enabling packet match detection\n");
1875 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1876 if (ret < 0) {
1877 netdev_warn(dev->net, "Error reading WUCSR\n");
1878 goto done;
1879 }
1880
1881 val |= WUCSR_WUEN;
1882
1883 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1884 if (ret < 0) {
1885 netdev_warn(dev->net, "Error writing WUCSR\n");
1886 goto done;
1887 }
1888 } else {
1889 netdev_info(dev->net, "disabling packet match detection\n");
1890 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1891 if (ret < 0) {
1892 netdev_warn(dev->net, "Error reading WUCSR\n");
1893 goto done;
1894 }
1895
1896 val &= ~WUCSR_WUEN;
1897
1898 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1899 if (ret < 0) {
1900 netdev_warn(dev->net, "Error writing WUCSR\n");
1901 goto done;
1902 }
1903 }
1904
1905 /* disable magic, bcast & unicast wakeup sources */
1906 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1907 if (ret < 0) {
1908 netdev_warn(dev->net, "Error reading WUCSR\n");
1909 goto done;
1910 }
1911
1912 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1913
1914 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1915 if (ret < 0) {
1916 netdev_warn(dev->net, "Error writing WUCSR\n");
1917 goto done;
1918 }
1919
1920 if (pdata->wolopts & WAKE_PHY) {
1921 netdev_info(dev->net, "enabling PHY wakeup\n");
1922
1923 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1924 if (ret < 0) {
1925 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1926 goto done;
1927 }
1928
1929 /* clear wol status, enable energy detection */
1930 val &= ~PMT_CTL_WUPS;
1931 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1932
1933 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1934 if (ret < 0) {
1935 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1936 goto done;
1937 }
1938 }
1939
1940 if (pdata->wolopts & WAKE_MAGIC) {
1941 netdev_info(dev->net, "enabling magic packet wakeup\n");
1942 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1943 if (ret < 0) {
1944 netdev_warn(dev->net, "Error reading WUCSR\n");
1945 goto done;
1946 }
1947
1948 /* clear any pending magic packet status */
1949 val |= WUCSR_MPR | WUCSR_MPEN;
1950
1951 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1952 if (ret < 0) {
1953 netdev_warn(dev->net, "Error writing WUCSR\n");
1954 goto done;
1955 }
1956 }
1957
1958 if (pdata->wolopts & WAKE_BCAST) {
1959 netdev_info(dev->net, "enabling broadcast detection\n");
1960 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1961 if (ret < 0) {
1962 netdev_warn(dev->net, "Error reading WUCSR\n");
1963 goto done;
1964 }
1965
1966 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1967
1968 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1969 if (ret < 0) {
1970 netdev_warn(dev->net, "Error writing WUCSR\n");
1971 goto done;
1972 }
1973 }
1974
1975 if (pdata->wolopts & WAKE_UCAST) {
1976 netdev_info(dev->net, "enabling unicast detection\n");
1977 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1978 if (ret < 0) {
1979 netdev_warn(dev->net, "Error reading WUCSR\n");
1980 goto done;
1981 }
1982
1983 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1984
1985 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1986 if (ret < 0) {
1987 netdev_warn(dev->net, "Error writing WUCSR\n");
1988 goto done;
1989 }
1990 }
1991
1992 /* enable receiver to enable frame reception */
1993 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1994 if (ret < 0) {
1995 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1996 goto done;
1997 }
1998
1999 val |= MAC_RX_RXEN;
2000
2001 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2002 if (ret < 0) {
2003 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2004 goto done;
2005 }
2006
2007 /* some wol options are enabled, so enter SUSPEND0 */
2008 netdev_info(dev->net, "entering SUSPEND0 mode\n");
2009 ret = smsc75xx_enter_suspend0(dev);
2010
2011 done:
2012 /*
2013 * TODO: resume() might need to handle the suspend failure
2014 * in system sleep
2015 */
2016 if (ret && PMSG_IS_AUTO(message))
2017 usbnet_resume(intf);
2018 return ret;
2019 }
2020
2021 static int smsc75xx_resume(struct usb_interface *intf)
2022 {
2023 struct usbnet *dev = usb_get_intfdata(intf);
2024 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2025 u8 suspend_flags = pdata->suspend_flags;
2026 int ret;
2027 u32 val;
2028
2029 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2030
2031 /* do this first to ensure it's cleared even in error case */
2032 pdata->suspend_flags = 0;
2033
2034 if (suspend_flags & SUSPEND_ALLMODES) {
2035 /* Disable wakeup sources */
2036 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2037 if (ret < 0) {
2038 netdev_warn(dev->net, "Error reading WUCSR\n");
2039 return ret;
2040 }
2041
2042 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2043 | WUCSR_BCST_EN);
2044
2045 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2046 if (ret < 0) {
2047 netdev_warn(dev->net, "Error writing WUCSR\n");
2048 return ret;
2049 }
2050
2051 /* clear wake-up status */
2052 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2053 if (ret < 0) {
2054 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2055 return ret;
2056 }
2057
2058 val &= ~PMT_CTL_WOL_EN;
2059 val |= PMT_CTL_WUPS;
2060
2061 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2062 if (ret < 0) {
2063 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2064 return ret;
2065 }
2066 }
2067
2068 if (suspend_flags & SUSPEND_SUSPEND2) {
2069 netdev_info(dev->net, "resuming from SUSPEND2\n");
2070
2071 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2072 if (ret < 0) {
2073 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2074 return ret;
2075 }
2076
2077 val |= PMT_CTL_PHY_PWRUP;
2078
2079 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2080 if (ret < 0) {
2081 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2082 return ret;
2083 }
2084 }
2085
2086 ret = smsc75xx_wait_ready(dev, 1);
2087 if (ret < 0) {
2088 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2089 return ret;
2090 }
2091
2092 return usbnet_resume(intf);
2093 }
2094
2095 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2096 u32 rx_cmd_a, u32 rx_cmd_b)
2097 {
2098 if (!(dev->net->features & NETIF_F_RXCSUM) ||
2099 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2100 skb->ip_summed = CHECKSUM_NONE;
2101 } else {
2102 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2103 skb->ip_summed = CHECKSUM_COMPLETE;
2104 }
2105 }
2106
2107 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2108 {
2109 while (skb->len > 0) {
2110 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2111 struct sk_buff *ax_skb;
2112 unsigned char *packet;
2113
2114 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2115 le32_to_cpus(&rx_cmd_a);
2116 skb_pull(skb, 4);
2117
2118 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2119 le32_to_cpus(&rx_cmd_b);
2120 skb_pull(skb, 4 + RXW_PADDING);
2121
2122 packet = skb->data;
2123
2124 /* get the packet length */
2125 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2126 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2127
2128 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2129 netif_dbg(dev, rx_err, dev->net,
2130 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2131 dev->net->stats.rx_errors++;
2132 dev->net->stats.rx_dropped++;
2133
2134 if (rx_cmd_a & RX_CMD_A_FCS)
2135 dev->net->stats.rx_crc_errors++;
2136 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2137 dev->net->stats.rx_frame_errors++;
2138 } else {
2139 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2140 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2141 netif_dbg(dev, rx_err, dev->net,
2142 "size err rx_cmd_a=0x%08x\n",
2143 rx_cmd_a);
2144 return 0;
2145 }
2146
2147 /* last frame in this batch */
2148 if (skb->len == size) {
2149 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2150 rx_cmd_b);
2151
2152 skb_trim(skb, skb->len - 4); /* remove fcs */
2153 skb->truesize = size + sizeof(struct sk_buff);
2154
2155 return 1;
2156 }
2157
2158 ax_skb = skb_clone(skb, GFP_ATOMIC);
2159 if (unlikely(!ax_skb)) {
2160 netdev_warn(dev->net, "Error allocating skb\n");
2161 return 0;
2162 }
2163
2164 ax_skb->len = size;
2165 ax_skb->data = packet;
2166 skb_set_tail_pointer(ax_skb, size);
2167
2168 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2169 rx_cmd_b);
2170
2171 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2172 ax_skb->truesize = size + sizeof(struct sk_buff);
2173
2174 usbnet_skb_return(dev, ax_skb);
2175 }
2176
2177 skb_pull(skb, size);
2178
2179 /* padding bytes before the next frame starts */
2180 if (skb->len)
2181 skb_pull(skb, align_count);
2182 }
2183
2184 if (unlikely(skb->len < 0)) {
2185 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
2186 return 0;
2187 }
2188
2189 return 1;
2190 }
2191
2192 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2193 struct sk_buff *skb, gfp_t flags)
2194 {
2195 u32 tx_cmd_a, tx_cmd_b;
2196
2197 if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2198 struct sk_buff *skb2 =
2199 skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2200 dev_kfree_skb_any(skb);
2201 skb = skb2;
2202 if (!skb)
2203 return NULL;
2204 }
2205
2206 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2207
2208 if (skb->ip_summed == CHECKSUM_PARTIAL)
2209 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2210
2211 if (skb_is_gso(skb)) {
2212 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2213 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2214
2215 tx_cmd_a |= TX_CMD_A_LSO;
2216 } else {
2217 tx_cmd_b = 0;
2218 }
2219
2220 skb_push(skb, 4);
2221 cpu_to_le32s(&tx_cmd_b);
2222 memcpy(skb->data, &tx_cmd_b, 4);
2223
2224 skb_push(skb, 4);
2225 cpu_to_le32s(&tx_cmd_a);
2226 memcpy(skb->data, &tx_cmd_a, 4);
2227
2228 return skb;
2229 }
2230
2231 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2232 {
2233 dev->intf->needs_remote_wakeup = on;
2234 return 0;
2235 }
2236
2237 static const struct driver_info smsc75xx_info = {
2238 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
2239 .bind = smsc75xx_bind,
2240 .unbind = smsc75xx_unbind,
2241 .link_reset = smsc75xx_link_reset,
2242 .reset = smsc75xx_reset,
2243 .rx_fixup = smsc75xx_rx_fixup,
2244 .tx_fixup = smsc75xx_tx_fixup,
2245 .status = smsc75xx_status,
2246 .manage_power = smsc75xx_manage_power,
2247 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2248 };
2249
2250 static const struct usb_device_id products[] = {
2251 {
2252 /* SMSC7500 USB Gigabit Ethernet Device */
2253 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2254 .driver_info = (unsigned long) &smsc75xx_info,
2255 },
2256 {
2257 /* SMSC7500 USB Gigabit Ethernet Device */
2258 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2259 .driver_info = (unsigned long) &smsc75xx_info,
2260 },
2261 { }, /* END */
2262 };
2263 MODULE_DEVICE_TABLE(usb, products);
2264
2265 static struct usb_driver smsc75xx_driver = {
2266 .name = SMSC_CHIPNAME,
2267 .id_table = products,
2268 .probe = usbnet_probe,
2269 .suspend = smsc75xx_suspend,
2270 .resume = smsc75xx_resume,
2271 .reset_resume = smsc75xx_resume,
2272 .disconnect = usbnet_disconnect,
2273 .disable_hub_initiated_lpm = 1,
2274 .supports_autosuspend = 1,
2275 };
2276
2277 module_usb_driver(smsc75xx_driver);
2278
2279 MODULE_AUTHOR("Nancy Lin");
2280 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2281 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2282 MODULE_LICENSE("GPL");
Linux with added FPC-III support