tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-or-later
2 /***************************************************************************
3 *
4 * Copyright (C) 2007-2010 SMSC
5 *
6 *****************************************************************************/
7
8#include <linux/module.h>
9#include <linux/kmod.h>
10#include <linux/netdevice.h>
11#include <linux/etherdevice.h>
12#include <linux/ethtool.h>
13#include <linux/mii.h>
14#include <linux/usb.h>
15#include <linux/bitrev.h>
16#include <linux/crc16.h>
17#include <linux/crc32.h>
18#include <linux/usb/usbnet.h>
19#include <linux/slab.h>
20#include <linux/of_net.h>
21#include "smsc75xx.h"
22
23#define SMSC_CHIPNAME "smsc75xx"
24#define SMSC_DRIVER_VERSION "1.0.0"
25#define HS_USB_PKT_SIZE (512)
26#define FS_USB_PKT_SIZE (64)
27#define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
28#define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
29#define DEFAULT_BULK_IN_DELAY (0x00002000)
30#define MAX_SINGLE_PACKET_SIZE (9000)
31#define LAN75XX_EEPROM_MAGIC (0x7500)
32#define EEPROM_MAC_OFFSET (0x01)
33#define DEFAULT_TX_CSUM_ENABLE (true)
34#define DEFAULT_RX_CSUM_ENABLE (true)
35#define SMSC75XX_INTERNAL_PHY_ID (1)
36#define SMSC75XX_TX_OVERHEAD (8)
37#define MAX_RX_FIFO_SIZE (20 * 1024)
38#define MAX_TX_FIFO_SIZE (12 * 1024)
39#define USB_VENDOR_ID_SMSC (0x0424)
40#define USB_PRODUCT_ID_LAN7500 (0x7500)
41#define USB_PRODUCT_ID_LAN7505 (0x7505)
42#define RXW_PADDING 2
43#define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
44 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
45
46#define SUSPEND_SUSPEND0 (0x01)
47#define SUSPEND_SUSPEND1 (0x02)
48#define SUSPEND_SUSPEND2 (0x04)
49#define SUSPEND_SUSPEND3 (0x08)
50#define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
51 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
52
53struct smsc75xx_priv {
54 struct usbnet *dev;
55 u32 rfe_ctl;
56 u32 wolopts;
57 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
58 struct mutex dataport_mutex;
59 spinlock_t rfe_ctl_lock;
60 struct work_struct set_multicast;
61 u8 suspend_flags;
62};
63
64struct usb_context {
65 struct usb_ctrlrequest req;
66 struct usbnet *dev;
67};
68
69static bool turbo_mode = true;
70module_param(turbo_mode, bool, 0644);
71MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
72
73static int smsc75xx_link_ok_nopm(struct usbnet *dev);
74static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
75
76static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
77 u32 *data, int in_pm)
78{
79 u32 buf;
80 int ret;
81 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
82
83 BUG_ON(!dev);
84
85 if (!in_pm)
86 fn = usbnet_read_cmd;
87 else
88 fn = usbnet_read_cmd_nopm;
89
90 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
91 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
92 0, index, &buf, 4);
93 if (unlikely(ret < 0)) {
94 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
95 index, ret);
96 return ret;
97 }
98
99 le32_to_cpus(&buf);
100 *data = buf;
101
102 return ret;
103}
104
105static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
106 u32 data, int in_pm)
107{
108 u32 buf;
109 int ret;
110 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
111
112 BUG_ON(!dev);
113
114 if (!in_pm)
115 fn = usbnet_write_cmd;
116 else
117 fn = usbnet_write_cmd_nopm;
118
119 buf = data;
120 cpu_to_le32s(&buf);
121
122 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
123 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
124 0, index, &buf, 4);
125 if (unlikely(ret < 0))
126 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
127 index, ret);
128
129 return ret;
130}
131
132static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
133 u32 *data)
134{
135 return __smsc75xx_read_reg(dev, index, data, 1);
136}
137
138static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
139 u32 data)
140{
141 return __smsc75xx_write_reg(dev, index, data, 1);
142}
143
144static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
145 u32 *data)
146{
147 return __smsc75xx_read_reg(dev, index, data, 0);
148}
149
150static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
151 u32 data)
152{
153 return __smsc75xx_write_reg(dev, index, data, 0);
154}
155
156/* Loop until the read is completed with timeout
157 * called with phy_mutex held */
158static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
159 int in_pm)
160{
161 unsigned long start_time = jiffies;
162 u32 val;
163 int ret;
164
165 do {
166 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
167 if (ret < 0) {
168 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
169 return ret;
170 }
171
172 if (!(val & MII_ACCESS_BUSY))
173 return 0;
174 } while (!time_after(jiffies, start_time + HZ));
175
176 return -EIO;
177}
178
179static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
180 int in_pm)
181{
182 struct usbnet *dev = netdev_priv(netdev);
183 u32 val, addr;
184 int ret;
185
186 mutex_lock(&dev->phy_mutex);
187
188 /* confirm MII not busy */
189 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
190 if (ret < 0) {
191 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
192 goto done;
193 }
194
195 /* set the address, index & direction (read from PHY) */
196 phy_id &= dev->mii.phy_id_mask;
197 idx &= dev->mii.reg_num_mask;
198 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
199 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
200 | MII_ACCESS_READ | MII_ACCESS_BUSY;
201 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
202 if (ret < 0) {
203 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
204 goto done;
205 }
206
207 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
208 if (ret < 0) {
209 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
210 goto done;
211 }
212
213 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
214 if (ret < 0) {
215 netdev_warn(dev->net, "Error reading MII_DATA\n");
216 goto done;
217 }
218
219 ret = (u16)(val & 0xFFFF);
220
221done:
222 mutex_unlock(&dev->phy_mutex);
223 return ret;
224}
225
226static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
227 int idx, int regval, int in_pm)
228{
229 struct usbnet *dev = netdev_priv(netdev);
230 u32 val, addr;
231 int ret;
232
233 mutex_lock(&dev->phy_mutex);
234
235 /* confirm MII not busy */
236 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
237 if (ret < 0) {
238 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
239 goto done;
240 }
241
242 val = regval;
243 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
244 if (ret < 0) {
245 netdev_warn(dev->net, "Error writing MII_DATA\n");
246 goto done;
247 }
248
249 /* set the address, index & direction (write to PHY) */
250 phy_id &= dev->mii.phy_id_mask;
251 idx &= dev->mii.reg_num_mask;
252 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
253 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
254 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
255 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
256 if (ret < 0) {
257 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
258 goto done;
259 }
260
261 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
262 if (ret < 0) {
263 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
264 goto done;
265 }
266
267done:
268 mutex_unlock(&dev->phy_mutex);
269}
270
271static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
272 int idx)
273{
274 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
275}
276
277static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
278 int idx, int regval)
279{
280 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
281}
282
283static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
284{
285 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
286}
287
288static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
289 int regval)
290{
291 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
292}
293
294static int smsc75xx_wait_eeprom(struct usbnet *dev)
295{
296 unsigned long start_time = jiffies;
297 u32 val;
298 int ret;
299
300 do {
301 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
302 if (ret < 0) {
303 netdev_warn(dev->net, "Error reading E2P_CMD\n");
304 return ret;
305 }
306
307 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
308 break;
309 udelay(40);
310 } while (!time_after(jiffies, start_time + HZ));
311
312 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
313 netdev_warn(dev->net, "EEPROM read operation timeout\n");
314 return -EIO;
315 }
316
317 return 0;
318}
319
320static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
321{
322 unsigned long start_time = jiffies;
323 u32 val;
324 int ret;
325
326 do {
327 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
328 if (ret < 0) {
329 netdev_warn(dev->net, "Error reading E2P_CMD\n");
330 return ret;
331 }
332
333 if (!(val & E2P_CMD_BUSY))
334 return 0;
335
336 udelay(40);
337 } while (!time_after(jiffies, start_time + HZ));
338
339 netdev_warn(dev->net, "EEPROM is busy\n");
340 return -EIO;
341}
342
343static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
344 u8 *data)
345{
346 u32 val;
347 int i, ret;
348
349 BUG_ON(!dev);
350 BUG_ON(!data);
351
352 ret = smsc75xx_eeprom_confirm_not_busy(dev);
353 if (ret)
354 return ret;
355
356 for (i = 0; i < length; i++) {
357 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
358 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
359 if (ret < 0) {
360 netdev_warn(dev->net, "Error writing E2P_CMD\n");
361 return ret;
362 }
363
364 ret = smsc75xx_wait_eeprom(dev);
365 if (ret < 0)
366 return ret;
367
368 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
369 if (ret < 0) {
370 netdev_warn(dev->net, "Error reading E2P_DATA\n");
371 return ret;
372 }
373
374 data[i] = val & 0xFF;
375 offset++;
376 }
377
378 return 0;
379}
380
381static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
382 u8 *data)
383{
384 u32 val;
385 int i, ret;
386
387 BUG_ON(!dev);
388 BUG_ON(!data);
389
390 ret = smsc75xx_eeprom_confirm_not_busy(dev);
391 if (ret)
392 return ret;
393
394 /* Issue write/erase enable command */
395 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
396 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
397 if (ret < 0) {
398 netdev_warn(dev->net, "Error writing E2P_CMD\n");
399 return ret;
400 }
401
402 ret = smsc75xx_wait_eeprom(dev);
403 if (ret < 0)
404 return ret;
405
406 for (i = 0; i < length; i++) {
407
408 /* Fill data register */
409 val = data[i];
410 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
411 if (ret < 0) {
412 netdev_warn(dev->net, "Error writing E2P_DATA\n");
413 return ret;
414 }
415
416 /* Send "write" command */
417 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
418 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
419 if (ret < 0) {
420 netdev_warn(dev->net, "Error writing E2P_CMD\n");
421 return ret;
422 }
423
424 ret = smsc75xx_wait_eeprom(dev);
425 if (ret < 0)
426 return ret;
427
428 offset++;
429 }
430
431 return 0;
432}
433
434static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
435{
436 int i, ret;
437
438 for (i = 0; i < 100; i++) {
439 u32 dp_sel;
440 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
441 if (ret < 0) {
442 netdev_warn(dev->net, "Error reading DP_SEL\n");
443 return ret;
444 }
445
446 if (dp_sel & DP_SEL_DPRDY)
447 return 0;
448
449 udelay(40);
450 }
451
452 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
453
454 return -EIO;
455}
456
457static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
458 u32 length, u32 *buf)
459{
460 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
461 u32 dp_sel;
462 int i, ret;
463
464 mutex_lock(&pdata->dataport_mutex);
465
466 ret = smsc75xx_dataport_wait_not_busy(dev);
467 if (ret < 0) {
468 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
469 goto done;
470 }
471
472 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
473 if (ret < 0) {
474 netdev_warn(dev->net, "Error reading DP_SEL\n");
475 goto done;
476 }
477
478 dp_sel &= ~DP_SEL_RSEL;
479 dp_sel |= ram_select;
480 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
481 if (ret < 0) {
482 netdev_warn(dev->net, "Error writing DP_SEL\n");
483 goto done;
484 }
485
486 for (i = 0; i < length; i++) {
487 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
488 if (ret < 0) {
489 netdev_warn(dev->net, "Error writing DP_ADDR\n");
490 goto done;
491 }
492
493 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
494 if (ret < 0) {
495 netdev_warn(dev->net, "Error writing DP_DATA\n");
496 goto done;
497 }
498
499 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
500 if (ret < 0) {
501 netdev_warn(dev->net, "Error writing DP_CMD\n");
502 goto done;
503 }
504
505 ret = smsc75xx_dataport_wait_not_busy(dev);
506 if (ret < 0) {
507 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
508 goto done;
509 }
510 }
511
512done:
513 mutex_unlock(&pdata->dataport_mutex);
514 return ret;
515}
516
517/* returns hash bit number for given MAC address */
518static u32 smsc75xx_hash(char addr[ETH_ALEN])
519{
520 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
521}
522
523static void smsc75xx_deferred_multicast_write(struct work_struct *param)
524{
525 struct smsc75xx_priv *pdata =
526 container_of(param, struct smsc75xx_priv, set_multicast);
527 struct usbnet *dev = pdata->dev;
528 int ret;
529
530 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
531 pdata->rfe_ctl);
532
533 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
534 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
535
536 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
537 if (ret < 0)
538 netdev_warn(dev->net, "Error writing RFE_CRL\n");
539}
540
541static void smsc75xx_set_multicast(struct net_device *netdev)
542{
543 struct usbnet *dev = netdev_priv(netdev);
544 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
545 unsigned long flags;
546 int i;
547
548 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
549
550 pdata->rfe_ctl &=
551 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
552 pdata->rfe_ctl |= RFE_CTL_AB;
553
554 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
555 pdata->multicast_hash_table[i] = 0;
556
557 if (dev->net->flags & IFF_PROMISC) {
558 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
559 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
560 } else if (dev->net->flags & IFF_ALLMULTI) {
561 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
562 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
563 } else if (!netdev_mc_empty(dev->net)) {
564 struct netdev_hw_addr *ha;
565
566 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
567
568 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
569
570 netdev_for_each_mc_addr(ha, netdev) {
571 u32 bitnum = smsc75xx_hash(ha->addr);
572 pdata->multicast_hash_table[bitnum / 32] |=
573 (1 << (bitnum % 32));
574 }
575 } else {
576 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
577 pdata->rfe_ctl |= RFE_CTL_DPF;
578 }
579
580 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
581
582 /* defer register writes to a sleepable context */
583 schedule_work(&pdata->set_multicast);
584}
585
586static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
587 u16 lcladv, u16 rmtadv)
588{
589 u32 flow = 0, fct_flow = 0;
590 int ret;
591
592 if (duplex == DUPLEX_FULL) {
593 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
594
595 if (cap & FLOW_CTRL_TX) {
596 flow = (FLOW_TX_FCEN | 0xFFFF);
597 /* set fct_flow thresholds to 20% and 80% */
598 fct_flow = (8 << 8) | 32;
599 }
600
601 if (cap & FLOW_CTRL_RX)
602 flow |= FLOW_RX_FCEN;
603
604 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
605 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
606 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
607 } else {
608 netif_dbg(dev, link, dev->net, "half duplex\n");
609 }
610
611 ret = smsc75xx_write_reg(dev, FLOW, flow);
612 if (ret < 0) {
613 netdev_warn(dev->net, "Error writing FLOW\n");
614 return ret;
615 }
616
617 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
618 if (ret < 0) {
619 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
620 return ret;
621 }
622
623 return 0;
624}
625
626static int smsc75xx_link_reset(struct usbnet *dev)
627{
628 struct mii_if_info *mii = &dev->mii;
629 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
630 u16 lcladv, rmtadv;
631 int ret;
632
633 /* write to clear phy interrupt status */
634 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
635 PHY_INT_SRC_CLEAR_ALL);
636
637 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
638 if (ret < 0) {
639 netdev_warn(dev->net, "Error writing INT_STS\n");
640 return ret;
641 }
642
643 mii_check_media(mii, 1, 1);
644 mii_ethtool_gset(&dev->mii, &ecmd);
645 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
646 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
647
648 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
649 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
650
651 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
652}
653
654static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
655{
656 u32 intdata;
657
658 if (urb->actual_length != 4) {
659 netdev_warn(dev->net, "unexpected urb length %d\n",
660 urb->actual_length);
661 return;
662 }
663
664 intdata = get_unaligned_le32(urb->transfer_buffer);
665
666 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
667
668 if (intdata & INT_ENP_PHY_INT)
669 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
670 else
671 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
672 intdata);
673}
674
675static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
676{
677 return MAX_EEPROM_SIZE;
678}
679
680static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
681 struct ethtool_eeprom *ee, u8 *data)
682{
683 struct usbnet *dev = netdev_priv(netdev);
684
685 ee->magic = LAN75XX_EEPROM_MAGIC;
686
687 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
688}
689
690static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
691 struct ethtool_eeprom *ee, u8 *data)
692{
693 struct usbnet *dev = netdev_priv(netdev);
694
695 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
696 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
697 ee->magic);
698 return -EINVAL;
699 }
700
701 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
702}
703
704static void smsc75xx_ethtool_get_wol(struct net_device *net,
705 struct ethtool_wolinfo *wolinfo)
706{
707 struct usbnet *dev = netdev_priv(net);
708 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
709
710 wolinfo->supported = SUPPORTED_WAKE;
711 wolinfo->wolopts = pdata->wolopts;
712}
713
714static int smsc75xx_ethtool_set_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 int ret;
720
721 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
722 return -EINVAL;
723
724 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
725
726 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
727 if (ret < 0)
728 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
729
730 return ret;
731}
732
733static const struct ethtool_ops smsc75xx_ethtool_ops = {
734 .get_link = usbnet_get_link,
735 .nway_reset = usbnet_nway_reset,
736 .get_drvinfo = usbnet_get_drvinfo,
737 .get_msglevel = usbnet_get_msglevel,
738 .set_msglevel = usbnet_set_msglevel,
739 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
740 .get_eeprom = smsc75xx_ethtool_get_eeprom,
741 .set_eeprom = smsc75xx_ethtool_set_eeprom,
742 .get_wol = smsc75xx_ethtool_get_wol,
743 .set_wol = smsc75xx_ethtool_set_wol,
744 .get_link_ksettings = usbnet_get_link_ksettings_mii,
745 .set_link_ksettings = usbnet_set_link_ksettings_mii,
746};
747
748static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
749{
750 struct usbnet *dev = netdev_priv(netdev);
751
752 if (!netif_running(netdev))
753 return -EINVAL;
754
755 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
756}
757
758static void smsc75xx_init_mac_address(struct usbnet *dev)
759{
760 u8 addr[ETH_ALEN];
761
762 /* maybe the boot loader passed the MAC address in devicetree */
763 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
764 if (is_valid_ether_addr(dev->net->dev_addr)) {
765 /* device tree values are valid so use them */
766 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
767 return;
768 }
769 }
770
771 /* try reading mac address from EEPROM */
772 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
773 eth_hw_addr_set(dev->net, addr);
774 if (is_valid_ether_addr(dev->net->dev_addr)) {
775 /* eeprom values are valid so use them */
776 netif_dbg(dev, ifup, dev->net,
777 "MAC address read from EEPROM\n");
778 return;
779 }
780 }
781
782 /* no useful static MAC address found. generate a random one */
783 eth_hw_addr_random(dev->net);
784 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
785}
786
787static int smsc75xx_set_mac_address(struct usbnet *dev)
788{
789 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
790 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
791 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
792
793 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
794 if (ret < 0) {
795 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
796 return ret;
797 }
798
799 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
800 if (ret < 0) {
801 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
802 return ret;
803 }
804
805 addr_hi |= ADDR_FILTX_FB_VALID;
806 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
807 if (ret < 0) {
808 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
809 return ret;
810 }
811
812 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
813 if (ret < 0)
814 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
815
816 return ret;
817}
818
819static int smsc75xx_phy_initialize(struct usbnet *dev)
820{
821 int bmcr, ret, timeout = 0;
822
823 /* Initialize MII structure */
824 dev->mii.dev = dev->net;
825 dev->mii.mdio_read = smsc75xx_mdio_read;
826 dev->mii.mdio_write = smsc75xx_mdio_write;
827 dev->mii.phy_id_mask = 0x1f;
828 dev->mii.reg_num_mask = 0x1f;
829 dev->mii.supports_gmii = 1;
830 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
831
832 /* reset phy and wait for reset to complete */
833 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
834
835 do {
836 msleep(10);
837 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
838 if (bmcr < 0) {
839 netdev_warn(dev->net, "Error reading MII_BMCR\n");
840 return bmcr;
841 }
842 timeout++;
843 } while ((bmcr & BMCR_RESET) && (timeout < 100));
844
845 if (timeout >= 100) {
846 netdev_warn(dev->net, "timeout on PHY Reset\n");
847 return -EIO;
848 }
849
850 /* phy workaround for gig link */
851 smsc75xx_phy_gig_workaround(dev);
852
853 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
854 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
855 ADVERTISE_PAUSE_ASYM);
856 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
857 ADVERTISE_1000FULL);
858
859 /* read and write to clear phy interrupt status */
860 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
861 if (ret < 0) {
862 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
863 return ret;
864 }
865
866 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
867
868 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
869 PHY_INT_MASK_DEFAULT);
870 mii_nway_restart(&dev->mii);
871
872 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
873 return 0;
874}
875
876static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
877{
878 int ret = 0;
879 u32 buf;
880 bool rxenabled;
881
882 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
883 if (ret < 0) {
884 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
885 return ret;
886 }
887
888 rxenabled = ((buf & MAC_RX_RXEN) != 0);
889
890 if (rxenabled) {
891 buf &= ~MAC_RX_RXEN;
892 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
893 if (ret < 0) {
894 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
895 return ret;
896 }
897 }
898
899 /* add 4 to size for FCS */
900 buf &= ~MAC_RX_MAX_SIZE;
901 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
902
903 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
904 if (ret < 0) {
905 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
906 return ret;
907 }
908
909 if (rxenabled) {
910 buf |= MAC_RX_RXEN;
911 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
912 if (ret < 0) {
913 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
914 return ret;
915 }
916 }
917
918 return 0;
919}
920
921static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
922{
923 struct usbnet *dev = netdev_priv(netdev);
924 int ret;
925
926 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
927 if (ret < 0) {
928 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
929 return ret;
930 }
931
932 return usbnet_change_mtu(netdev, new_mtu);
933}
934
935/* Enable or disable Rx checksum offload engine */
936static int smsc75xx_set_features(struct net_device *netdev,
937 netdev_features_t features)
938{
939 struct usbnet *dev = netdev_priv(netdev);
940 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
941 unsigned long flags;
942 int ret;
943
944 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
945
946 if (features & NETIF_F_RXCSUM)
947 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
948 else
949 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
950
951 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
952 /* it's racing here! */
953
954 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
955 if (ret < 0) {
956 netdev_warn(dev->net, "Error writing RFE_CTL\n");
957 return ret;
958 }
959 return 0;
960}
961
962static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
963{
964 int timeout = 0;
965
966 do {
967 u32 buf;
968 int ret;
969
970 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
971
972 if (ret < 0) {
973 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
974 return ret;
975 }
976
977 if (buf & PMT_CTL_DEV_RDY)
978 return 0;
979
980 msleep(10);
981 timeout++;
982 } while (timeout < 100);
983
984 netdev_warn(dev->net, "timeout waiting for device ready\n");
985 return -EIO;
986}
987
988static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
989{
990 struct mii_if_info *mii = &dev->mii;
991 int ret = 0, timeout = 0;
992 u32 buf, link_up = 0;
993
994 /* Set the phy in Gig loopback */
995 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
996
997 /* Wait for the link up */
998 do {
999 link_up = smsc75xx_link_ok_nopm(dev);
1000 usleep_range(10000, 20000);
1001 timeout++;
1002 } while ((!link_up) && (timeout < 1000));
1003
1004 if (timeout >= 1000) {
1005 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1006 return -EIO;
1007 }
1008
1009 /* phy reset */
1010 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1011 if (ret < 0) {
1012 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1013 return ret;
1014 }
1015
1016 buf |= PMT_CTL_PHY_RST;
1017
1018 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1019 if (ret < 0) {
1020 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1021 return ret;
1022 }
1023
1024 timeout = 0;
1025 do {
1026 usleep_range(10000, 20000);
1027 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1028 if (ret < 0) {
1029 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1030 ret);
1031 return ret;
1032 }
1033 timeout++;
1034 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1035
1036 if (timeout >= 100) {
1037 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1038 return -EIO;
1039 }
1040
1041 return 0;
1042}
1043
1044static int smsc75xx_reset(struct usbnet *dev)
1045{
1046 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1047 u32 buf;
1048 int ret = 0, timeout;
1049
1050 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1051
1052 ret = smsc75xx_wait_ready(dev, 0);
1053 if (ret < 0) {
1054 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1055 return ret;
1056 }
1057
1058 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1059 if (ret < 0) {
1060 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1061 return ret;
1062 }
1063
1064 buf |= HW_CFG_LRST;
1065
1066 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1067 if (ret < 0) {
1068 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1069 return ret;
1070 }
1071
1072 timeout = 0;
1073 do {
1074 msleep(10);
1075 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1076 if (ret < 0) {
1077 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1078 return ret;
1079 }
1080 timeout++;
1081 } while ((buf & HW_CFG_LRST) && (timeout < 100));
1082
1083 if (timeout >= 100) {
1084 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1085 return -EIO;
1086 }
1087
1088 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1089
1090 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1091 if (ret < 0) {
1092 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1093 return ret;
1094 }
1095
1096 buf |= PMT_CTL_PHY_RST;
1097
1098 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1099 if (ret < 0) {
1100 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1101 return ret;
1102 }
1103
1104 timeout = 0;
1105 do {
1106 msleep(10);
1107 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1108 if (ret < 0) {
1109 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1110 return ret;
1111 }
1112 timeout++;
1113 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1114
1115 if (timeout >= 100) {
1116 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1117 return -EIO;
1118 }
1119
1120 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1121
1122 ret = smsc75xx_set_mac_address(dev);
1123 if (ret < 0) {
1124 netdev_warn(dev->net, "Failed to set mac address\n");
1125 return ret;
1126 }
1127
1128 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1129 dev->net->dev_addr);
1130
1131 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1132 if (ret < 0) {
1133 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1134 return ret;
1135 }
1136
1137 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1138 buf);
1139
1140 buf |= HW_CFG_BIR;
1141
1142 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1143 if (ret < 0) {
1144 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1145 return ret;
1146 }
1147
1148 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1149 if (ret < 0) {
1150 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1151 return ret;
1152 }
1153
1154 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1155 buf);
1156
1157 if (!turbo_mode) {
1158 buf = 0;
1159 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1160 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1161 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1162 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1163 } else {
1164 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1165 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1166 }
1167
1168 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1169 (ulong)dev->rx_urb_size);
1170
1171 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1172 if (ret < 0) {
1173 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1174 return ret;
1175 }
1176
1177 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1178 if (ret < 0) {
1179 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1180 return ret;
1181 }
1182
1183 netif_dbg(dev, ifup, dev->net,
1184 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1185
1186 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1187 if (ret < 0) {
1188 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1189 return ret;
1190 }
1191
1192 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1193 if (ret < 0) {
1194 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1195 return ret;
1196 }
1197
1198 netif_dbg(dev, ifup, dev->net,
1199 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1200
1201 if (turbo_mode) {
1202 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1203 if (ret < 0) {
1204 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1205 return ret;
1206 }
1207
1208 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1209
1210 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1211
1212 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1213 if (ret < 0) {
1214 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1215 return ret;
1216 }
1217
1218 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1219 if (ret < 0) {
1220 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1221 return ret;
1222 }
1223
1224 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1225 }
1226
1227 /* set FIFO sizes */
1228 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1229 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1230 if (ret < 0) {
1231 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1232 return ret;
1233 }
1234
1235 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1236
1237 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1238 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1239 if (ret < 0) {
1240 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1241 return ret;
1242 }
1243
1244 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1245
1246 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1247 if (ret < 0) {
1248 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1249 return ret;
1250 }
1251
1252 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1253 if (ret < 0) {
1254 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1255 return ret;
1256 }
1257
1258 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1259
1260 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1261 if (ret < 0) {
1262 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1263 return ret;
1264 }
1265
1266 /* only set default GPIO/LED settings if no EEPROM is detected */
1267 if (!(buf & E2P_CMD_LOADED)) {
1268 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1269 if (ret < 0) {
1270 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1271 return ret;
1272 }
1273
1274 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1275 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1276
1277 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1278 if (ret < 0) {
1279 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1280 return ret;
1281 }
1282 }
1283
1284 ret = smsc75xx_write_reg(dev, FLOW, 0);
1285 if (ret < 0) {
1286 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1287 return ret;
1288 }
1289
1290 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1291 if (ret < 0) {
1292 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1293 return ret;
1294 }
1295
1296 /* Don't need rfe_ctl_lock during initialisation */
1297 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1298 if (ret < 0) {
1299 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1300 return ret;
1301 }
1302
1303 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1304
1305 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1306 if (ret < 0) {
1307 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1308 return ret;
1309 }
1310
1311 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1312 if (ret < 0) {
1313 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1314 return ret;
1315 }
1316
1317 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1318 pdata->rfe_ctl);
1319
1320 /* Enable or disable checksum offload engines */
1321 smsc75xx_set_features(dev->net, dev->net->features);
1322
1323 smsc75xx_set_multicast(dev->net);
1324
1325 ret = smsc75xx_phy_initialize(dev);
1326 if (ret < 0) {
1327 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1328 return ret;
1329 }
1330
1331 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1332 if (ret < 0) {
1333 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1334 return ret;
1335 }
1336
1337 /* enable PHY interrupts */
1338 buf |= INT_ENP_PHY_INT;
1339
1340 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1341 if (ret < 0) {
1342 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1343 return ret;
1344 }
1345
1346 /* allow mac to detect speed and duplex from phy */
1347 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1348 if (ret < 0) {
1349 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1350 return ret;
1351 }
1352
1353 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1354 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1355 if (ret < 0) {
1356 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1357 return ret;
1358 }
1359
1360 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1361 if (ret < 0) {
1362 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1363 return ret;
1364 }
1365
1366 buf |= MAC_TX_TXEN;
1367
1368 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1369 if (ret < 0) {
1370 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1371 return ret;
1372 }
1373
1374 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1375
1376 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1377 if (ret < 0) {
1378 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1379 return ret;
1380 }
1381
1382 buf |= FCT_TX_CTL_EN;
1383
1384 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1385 if (ret < 0) {
1386 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1387 return ret;
1388 }
1389
1390 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1391
1392 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1393 if (ret < 0) {
1394 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1395 return ret;
1396 }
1397
1398 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1399 if (ret < 0) {
1400 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1401 return ret;
1402 }
1403
1404 buf |= MAC_RX_RXEN;
1405
1406 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1407 if (ret < 0) {
1408 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1409 return ret;
1410 }
1411
1412 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1413
1414 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1415 if (ret < 0) {
1416 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1417 return ret;
1418 }
1419
1420 buf |= FCT_RX_CTL_EN;
1421
1422 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1423 if (ret < 0) {
1424 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1425 return ret;
1426 }
1427
1428 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1429
1430 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1431 return 0;
1432}
1433
1434static const struct net_device_ops smsc75xx_netdev_ops = {
1435 .ndo_open = usbnet_open,
1436 .ndo_stop = usbnet_stop,
1437 .ndo_start_xmit = usbnet_start_xmit,
1438 .ndo_tx_timeout = usbnet_tx_timeout,
1439 .ndo_get_stats64 = dev_get_tstats64,
1440 .ndo_change_mtu = smsc75xx_change_mtu,
1441 .ndo_set_mac_address = eth_mac_addr,
1442 .ndo_validate_addr = eth_validate_addr,
1443 .ndo_eth_ioctl = smsc75xx_ioctl,
1444 .ndo_set_rx_mode = smsc75xx_set_multicast,
1445 .ndo_set_features = smsc75xx_set_features,
1446};
1447
1448static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1449{
1450 struct smsc75xx_priv *pdata = NULL;
1451 int ret;
1452
1453 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1454
1455 ret = usbnet_get_endpoints(dev, intf);
1456 if (ret < 0) {
1457 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1458 return ret;
1459 }
1460
1461 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1462 GFP_KERNEL);
1463
1464 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1465 if (!pdata)
1466 return -ENOMEM;
1467
1468 pdata->dev = dev;
1469
1470 spin_lock_init(&pdata->rfe_ctl_lock);
1471 mutex_init(&pdata->dataport_mutex);
1472
1473 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1474
1475 if (DEFAULT_TX_CSUM_ENABLE)
1476 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1477
1478 if (DEFAULT_RX_CSUM_ENABLE)
1479 dev->net->features |= NETIF_F_RXCSUM;
1480
1481 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1482 NETIF_F_RXCSUM;
1483
1484 ret = smsc75xx_wait_ready(dev, 0);
1485 if (ret < 0) {
1486 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1487 goto free_pdata;
1488 }
1489
1490 smsc75xx_init_mac_address(dev);
1491
1492 /* Init all registers */
1493 ret = smsc75xx_reset(dev);
1494 if (ret < 0) {
1495 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1496 goto cancel_work;
1497 }
1498
1499 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1500 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1501 dev->net->flags |= IFF_MULTICAST;
1502 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1503 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1504 dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1505 return 0;
1506
1507cancel_work:
1508 cancel_work_sync(&pdata->set_multicast);
1509free_pdata:
1510 kfree(pdata);
1511 dev->data[0] = 0;
1512 return ret;
1513}
1514
1515static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1516{
1517 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1518 if (pdata) {
1519 cancel_work_sync(&pdata->set_multicast);
1520 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1521 kfree(pdata);
1522 dev->data[0] = 0;
1523 }
1524}
1525
1526static u16 smsc_crc(const u8 *buffer, size_t len)
1527{
1528 return bitrev16(crc16(0xFFFF, buffer, len));
1529}
1530
1531static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1532 u32 wuf_mask1)
1533{
1534 int cfg_base = WUF_CFGX + filter * 4;
1535 int mask_base = WUF_MASKX + filter * 16;
1536 int ret;
1537
1538 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1539 if (ret < 0) {
1540 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1541 return ret;
1542 }
1543
1544 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1545 if (ret < 0) {
1546 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1547 return ret;
1548 }
1549
1550 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1551 if (ret < 0) {
1552 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1553 return ret;
1554 }
1555
1556 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1557 if (ret < 0) {
1558 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1559 return ret;
1560 }
1561
1562 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1563 if (ret < 0) {
1564 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1565 return ret;
1566 }
1567
1568 return 0;
1569}
1570
1571static int smsc75xx_enter_suspend0(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_PHY_RST));
1584 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
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_SUSPEND0;
1593
1594 return 0;
1595}
1596
1597static int smsc75xx_enter_suspend1(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, 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_1;
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, enable energy detection */
1619 val &= ~PMT_CTL_WUPS;
1620 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
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_SUSPEND1;
1629
1630 return 0;
1631}
1632
1633static int smsc75xx_enter_suspend2(struct usbnet *dev)
1634{
1635 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1636 u32 val;
1637 int ret;
1638
1639 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1640 if (ret < 0) {
1641 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1642 return ret;
1643 }
1644
1645 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1646 val |= PMT_CTL_SUS_MODE_2;
1647
1648 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1649 if (ret < 0) {
1650 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1651 return ret;
1652 }
1653
1654 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1655
1656 return 0;
1657}
1658
1659static int smsc75xx_enter_suspend3(struct usbnet *dev)
1660{
1661 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1662 u32 val;
1663 int ret;
1664
1665 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1666 if (ret < 0) {
1667 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1668 return ret;
1669 }
1670
1671 if (val & FCT_RX_CTL_RXUSED) {
1672 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1673 return -EBUSY;
1674 }
1675
1676 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1677 if (ret < 0) {
1678 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1679 return ret;
1680 }
1681
1682 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1683 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1684
1685 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1686 if (ret < 0) {
1687 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1688 return ret;
1689 }
1690
1691 /* clear wol status */
1692 val &= ~PMT_CTL_WUPS;
1693 val |= PMT_CTL_WUPS_WOL;
1694
1695 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1696 if (ret < 0) {
1697 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1698 return ret;
1699 }
1700
1701 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1702
1703 return 0;
1704}
1705
1706static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1707{
1708 struct mii_if_info *mii = &dev->mii;
1709 int ret;
1710
1711 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1712
1713 /* read to clear */
1714 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1715 if (ret < 0) {
1716 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1717 return ret;
1718 }
1719
1720 /* enable interrupt source */
1721 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1722 if (ret < 0) {
1723 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1724 return ret;
1725 }
1726
1727 ret |= mask;
1728
1729 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1730
1731 return 0;
1732}
1733
1734static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1735{
1736 struct mii_if_info *mii = &dev->mii;
1737 int ret;
1738
1739 /* first, a dummy read, needed to latch some MII phys */
1740 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1741 if (ret < 0) {
1742 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1743 return ret;
1744 }
1745
1746 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1747 if (ret < 0) {
1748 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1749 return ret;
1750 }
1751
1752 return !!(ret & BMSR_LSTATUS);
1753}
1754
1755static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1756{
1757 int ret;
1758
1759 if (!netif_running(dev->net)) {
1760 /* interface is ifconfig down so fully power down hw */
1761 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1762 return smsc75xx_enter_suspend2(dev);
1763 }
1764
1765 if (!link_up) {
1766 /* link is down so enter EDPD mode */
1767 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1768
1769 /* enable PHY wakeup events for if cable is attached */
1770 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1771 PHY_INT_MASK_ANEG_COMP);
1772 if (ret < 0) {
1773 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1774 return ret;
1775 }
1776
1777 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1778 return smsc75xx_enter_suspend1(dev);
1779 }
1780
1781 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1782 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1783 PHY_INT_MASK_LINK_DOWN);
1784 if (ret < 0) {
1785 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1786 return ret;
1787 }
1788
1789 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1790 return smsc75xx_enter_suspend3(dev);
1791}
1792
1793static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1794{
1795 struct usbnet *dev = usb_get_intfdata(intf);
1796 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1797 u32 val, link_up;
1798 int ret;
1799
1800 ret = usbnet_suspend(intf, message);
1801 if (ret < 0) {
1802 netdev_warn(dev->net, "usbnet_suspend error\n");
1803 return ret;
1804 }
1805
1806 if (pdata->suspend_flags) {
1807 netdev_warn(dev->net, "error during last resume\n");
1808 pdata->suspend_flags = 0;
1809 }
1810
1811 /* determine if link is up using only _nopm functions */
1812 link_up = smsc75xx_link_ok_nopm(dev);
1813
1814 if (message.event == PM_EVENT_AUTO_SUSPEND) {
1815 ret = smsc75xx_autosuspend(dev, link_up);
1816 goto done;
1817 }
1818
1819 /* if we get this far we're not autosuspending */
1820 /* if no wol options set, or if link is down and we're not waking on
1821 * PHY activity, enter lowest power SUSPEND2 mode
1822 */
1823 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1824 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1825 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1826
1827 /* disable energy detect (link up) & wake up events */
1828 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1829 if (ret < 0) {
1830 netdev_warn(dev->net, "Error reading WUCSR\n");
1831 goto done;
1832 }
1833
1834 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1835
1836 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1837 if (ret < 0) {
1838 netdev_warn(dev->net, "Error writing WUCSR\n");
1839 goto done;
1840 }
1841
1842 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1843 if (ret < 0) {
1844 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1845 goto done;
1846 }
1847
1848 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1849
1850 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1851 if (ret < 0) {
1852 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1853 goto done;
1854 }
1855
1856 ret = smsc75xx_enter_suspend2(dev);
1857 goto done;
1858 }
1859
1860 if (pdata->wolopts & WAKE_PHY) {
1861 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1862 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1863 if (ret < 0) {
1864 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1865 goto done;
1866 }
1867
1868 /* if link is down then configure EDPD and enter SUSPEND1,
1869 * otherwise enter SUSPEND0 below
1870 */
1871 if (!link_up) {
1872 struct mii_if_info *mii = &dev->mii;
1873 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1874
1875 /* enable energy detect power-down mode */
1876 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1877 PHY_MODE_CTRL_STS);
1878 if (ret < 0) {
1879 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1880 goto done;
1881 }
1882
1883 ret |= MODE_CTRL_STS_EDPWRDOWN;
1884
1885 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1886 PHY_MODE_CTRL_STS, ret);
1887
1888 /* enter SUSPEND1 mode */
1889 ret = smsc75xx_enter_suspend1(dev);
1890 goto done;
1891 }
1892 }
1893
1894 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1895 int i, filter = 0;
1896
1897 /* disable all filters */
1898 for (i = 0; i < WUF_NUM; i++) {
1899 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1900 if (ret < 0) {
1901 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1902 goto done;
1903 }
1904 }
1905
1906 if (pdata->wolopts & WAKE_MCAST) {
1907 const u8 mcast[] = {0x01, 0x00, 0x5E};
1908 netdev_info(dev->net, "enabling multicast detection\n");
1909
1910 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1911 | smsc_crc(mcast, 3);
1912 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1913 if (ret < 0) {
1914 netdev_warn(dev->net, "Error writing wakeup filter\n");
1915 goto done;
1916 }
1917 }
1918
1919 if (pdata->wolopts & WAKE_ARP) {
1920 const u8 arp[] = {0x08, 0x06};
1921 netdev_info(dev->net, "enabling ARP detection\n");
1922
1923 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1924 | smsc_crc(arp, 2);
1925 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1926 if (ret < 0) {
1927 netdev_warn(dev->net, "Error writing wakeup filter\n");
1928 goto done;
1929 }
1930 }
1931
1932 /* clear any pending pattern match packet status */
1933 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1934 if (ret < 0) {
1935 netdev_warn(dev->net, "Error reading WUCSR\n");
1936 goto done;
1937 }
1938
1939 val |= WUCSR_WUFR;
1940
1941 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1942 if (ret < 0) {
1943 netdev_warn(dev->net, "Error writing WUCSR\n");
1944 goto done;
1945 }
1946
1947 netdev_info(dev->net, "enabling packet match detection\n");
1948 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1949 if (ret < 0) {
1950 netdev_warn(dev->net, "Error reading WUCSR\n");
1951 goto done;
1952 }
1953
1954 val |= WUCSR_WUEN;
1955
1956 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1957 if (ret < 0) {
1958 netdev_warn(dev->net, "Error writing WUCSR\n");
1959 goto done;
1960 }
1961 } else {
1962 netdev_info(dev->net, "disabling packet match detection\n");
1963 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1964 if (ret < 0) {
1965 netdev_warn(dev->net, "Error reading WUCSR\n");
1966 goto done;
1967 }
1968
1969 val &= ~WUCSR_WUEN;
1970
1971 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1972 if (ret < 0) {
1973 netdev_warn(dev->net, "Error writing WUCSR\n");
1974 goto done;
1975 }
1976 }
1977
1978 /* disable magic, bcast & unicast wakeup sources */
1979 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1980 if (ret < 0) {
1981 netdev_warn(dev->net, "Error reading WUCSR\n");
1982 goto done;
1983 }
1984
1985 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1986
1987 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1988 if (ret < 0) {
1989 netdev_warn(dev->net, "Error writing WUCSR\n");
1990 goto done;
1991 }
1992
1993 if (pdata->wolopts & WAKE_PHY) {
1994 netdev_info(dev->net, "enabling PHY wakeup\n");
1995
1996 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1997 if (ret < 0) {
1998 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1999 goto done;
2000 }
2001
2002 /* clear wol status, enable energy detection */
2003 val &= ~PMT_CTL_WUPS;
2004 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2005
2006 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2007 if (ret < 0) {
2008 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2009 goto done;
2010 }
2011 }
2012
2013 if (pdata->wolopts & WAKE_MAGIC) {
2014 netdev_info(dev->net, "enabling magic packet wakeup\n");
2015 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2016 if (ret < 0) {
2017 netdev_warn(dev->net, "Error reading WUCSR\n");
2018 goto done;
2019 }
2020
2021 /* clear any pending magic packet status */
2022 val |= WUCSR_MPR | WUCSR_MPEN;
2023
2024 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2025 if (ret < 0) {
2026 netdev_warn(dev->net, "Error writing WUCSR\n");
2027 goto done;
2028 }
2029 }
2030
2031 if (pdata->wolopts & WAKE_BCAST) {
2032 netdev_info(dev->net, "enabling broadcast detection\n");
2033 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2034 if (ret < 0) {
2035 netdev_warn(dev->net, "Error reading WUCSR\n");
2036 goto done;
2037 }
2038
2039 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2040
2041 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2042 if (ret < 0) {
2043 netdev_warn(dev->net, "Error writing WUCSR\n");
2044 goto done;
2045 }
2046 }
2047
2048 if (pdata->wolopts & WAKE_UCAST) {
2049 netdev_info(dev->net, "enabling unicast detection\n");
2050 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2051 if (ret < 0) {
2052 netdev_warn(dev->net, "Error reading WUCSR\n");
2053 goto done;
2054 }
2055
2056 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2057
2058 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2059 if (ret < 0) {
2060 netdev_warn(dev->net, "Error writing WUCSR\n");
2061 goto done;
2062 }
2063 }
2064
2065 /* enable receiver to enable frame reception */
2066 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2067 if (ret < 0) {
2068 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2069 goto done;
2070 }
2071
2072 val |= MAC_RX_RXEN;
2073
2074 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2075 if (ret < 0) {
2076 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2077 goto done;
2078 }
2079
2080 /* some wol options are enabled, so enter SUSPEND0 */
2081 netdev_info(dev->net, "entering SUSPEND0 mode\n");
2082 ret = smsc75xx_enter_suspend0(dev);
2083
2084done:
2085 /*
2086 * TODO: resume() might need to handle the suspend failure
2087 * in system sleep
2088 */
2089 if (ret && PMSG_IS_AUTO(message))
2090 usbnet_resume(intf);
2091 return ret;
2092}
2093
2094static int smsc75xx_resume(struct usb_interface *intf)
2095{
2096 struct usbnet *dev = usb_get_intfdata(intf);
2097 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2098 u8 suspend_flags = pdata->suspend_flags;
2099 int ret;
2100 u32 val;
2101
2102 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2103
2104 /* do this first to ensure it's cleared even in error case */
2105 pdata->suspend_flags = 0;
2106
2107 if (suspend_flags & SUSPEND_ALLMODES) {
2108 /* Disable wakeup sources */
2109 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2110 if (ret < 0) {
2111 netdev_warn(dev->net, "Error reading WUCSR\n");
2112 return ret;
2113 }
2114
2115 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2116 | WUCSR_BCST_EN);
2117
2118 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2119 if (ret < 0) {
2120 netdev_warn(dev->net, "Error writing WUCSR\n");
2121 return ret;
2122 }
2123
2124 /* clear wake-up status */
2125 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2126 if (ret < 0) {
2127 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2128 return ret;
2129 }
2130
2131 val &= ~PMT_CTL_WOL_EN;
2132 val |= PMT_CTL_WUPS;
2133
2134 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2135 if (ret < 0) {
2136 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2137 return ret;
2138 }
2139 }
2140
2141 if (suspend_flags & SUSPEND_SUSPEND2) {
2142 netdev_info(dev->net, "resuming from SUSPEND2\n");
2143
2144 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2145 if (ret < 0) {
2146 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2147 return ret;
2148 }
2149
2150 val |= PMT_CTL_PHY_PWRUP;
2151
2152 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2153 if (ret < 0) {
2154 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2155 return ret;
2156 }
2157 }
2158
2159 ret = smsc75xx_wait_ready(dev, 1);
2160 if (ret < 0) {
2161 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2162 return ret;
2163 }
2164
2165 return usbnet_resume(intf);
2166}
2167
2168static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2169 u32 rx_cmd_a, u32 rx_cmd_b)
2170{
2171 if (!(dev->net->features & NETIF_F_RXCSUM) ||
2172 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2173 skb->ip_summed = CHECKSUM_NONE;
2174 } else {
2175 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2176 skb->ip_summed = CHECKSUM_COMPLETE;
2177 }
2178}
2179
2180static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2181{
2182 /* This check is no longer done by usbnet */
2183 if (skb->len < dev->net->hard_header_len)
2184 return 0;
2185
2186 while (skb->len > 0) {
2187 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2188 struct sk_buff *ax_skb;
2189 unsigned char *packet;
2190
2191 rx_cmd_a = get_unaligned_le32(skb->data);
2192 skb_pull(skb, 4);
2193
2194 rx_cmd_b = get_unaligned_le32(skb->data);
2195 skb_pull(skb, 4 + RXW_PADDING);
2196
2197 packet = skb->data;
2198
2199 /* get the packet length */
2200 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2201 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2202
2203 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2204 netif_dbg(dev, rx_err, dev->net,
2205 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2206 dev->net->stats.rx_errors++;
2207 dev->net->stats.rx_dropped++;
2208
2209 if (rx_cmd_a & RX_CMD_A_FCS)
2210 dev->net->stats.rx_crc_errors++;
2211 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2212 dev->net->stats.rx_frame_errors++;
2213 } else {
2214 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2215 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2216 netif_dbg(dev, rx_err, dev->net,
2217 "size err rx_cmd_a=0x%08x\n",
2218 rx_cmd_a);
2219 return 0;
2220 }
2221
2222 /* last frame in this batch */
2223 if (skb->len == size) {
2224 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2225 rx_cmd_b);
2226
2227 skb_trim(skb, skb->len - 4); /* remove fcs */
2228 skb->truesize = size + sizeof(struct sk_buff);
2229
2230 return 1;
2231 }
2232
2233 ax_skb = skb_clone(skb, GFP_ATOMIC);
2234 if (unlikely(!ax_skb)) {
2235 netdev_warn(dev->net, "Error allocating skb\n");
2236 return 0;
2237 }
2238
2239 ax_skb->len = size;
2240 ax_skb->data = packet;
2241 skb_set_tail_pointer(ax_skb, size);
2242
2243 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2244 rx_cmd_b);
2245
2246 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2247 ax_skb->truesize = size + sizeof(struct sk_buff);
2248
2249 usbnet_skb_return(dev, ax_skb);
2250 }
2251
2252 skb_pull(skb, size);
2253
2254 /* padding bytes before the next frame starts */
2255 if (skb->len)
2256 skb_pull(skb, align_count);
2257 }
2258
2259 return 1;
2260}
2261
2262static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2263 struct sk_buff *skb, gfp_t flags)
2264{
2265 u32 tx_cmd_a, tx_cmd_b;
2266 void *ptr;
2267
2268 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2269 dev_kfree_skb_any(skb);
2270 return NULL;
2271 }
2272
2273 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2274
2275 if (skb->ip_summed == CHECKSUM_PARTIAL)
2276 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2277
2278 if (skb_is_gso(skb)) {
2279 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2280 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2281
2282 tx_cmd_a |= TX_CMD_A_LSO;
2283 } else {
2284 tx_cmd_b = 0;
2285 }
2286
2287 ptr = skb_push(skb, 8);
2288 put_unaligned_le32(tx_cmd_a, ptr);
2289 put_unaligned_le32(tx_cmd_b, ptr + 4);
2290
2291 return skb;
2292}
2293
2294static int smsc75xx_manage_power(struct usbnet *dev, int on)
2295{
2296 dev->intf->needs_remote_wakeup = on;
2297 return 0;
2298}
2299
2300static const struct driver_info smsc75xx_info = {
2301 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
2302 .bind = smsc75xx_bind,
2303 .unbind = smsc75xx_unbind,
2304 .link_reset = smsc75xx_link_reset,
2305 .reset = smsc75xx_reset,
2306 .rx_fixup = smsc75xx_rx_fixup,
2307 .tx_fixup = smsc75xx_tx_fixup,
2308 .status = smsc75xx_status,
2309 .manage_power = smsc75xx_manage_power,
2310 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2311};
2312
2313static const struct usb_device_id products[] = {
2314 {
2315 /* SMSC7500 USB Gigabit Ethernet Device */
2316 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2317 .driver_info = (unsigned long) &smsc75xx_info,
2318 },
2319 {
2320 /* SMSC7500 USB Gigabit Ethernet Device */
2321 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2322 .driver_info = (unsigned long) &smsc75xx_info,
2323 },
2324 { }, /* END */
2325};
2326MODULE_DEVICE_TABLE(usb, products);
2327
2328static struct usb_driver smsc75xx_driver = {
2329 .name = SMSC_CHIPNAME,
2330 .id_table = products,
2331 .probe = usbnet_probe,
2332 .suspend = smsc75xx_suspend,
2333 .resume = smsc75xx_resume,
2334 .reset_resume = smsc75xx_resume,
2335 .disconnect = usbnet_disconnect,
2336 .disable_hub_initiated_lpm = 1,
2337 .supports_autosuspend = 1,
2338};
2339
2340module_usb_driver(smsc75xx_driver);
2341
2342MODULE_AUTHOR("Nancy Lin");
2343MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2344MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2345MODULE_LICENSE("GPL");