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 smsc75xx_link_ok_nopm(struct usbnet *dev);
85 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
86
__smsc75xx_read_reg(struct usbnet * dev,u32 index,u32 * data,int in_pm)87 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
88 u32 *data, int in_pm)
89 {
90 u32 buf;
91 int ret;
92 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
93
94 BUG_ON(!dev);
95
96 if (!in_pm)
97 fn = usbnet_read_cmd;
98 else
99 fn = usbnet_read_cmd_nopm;
100
101 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
102 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
103 0, index, &buf, 4);
104 if (unlikely(ret < 0))
105 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
106 index, ret);
107
108 le32_to_cpus(&buf);
109 *data = buf;
110
111 return ret;
112 }
113
__smsc75xx_write_reg(struct usbnet * dev,u32 index,u32 data,int in_pm)114 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
115 u32 data, int in_pm)
116 {
117 u32 buf;
118 int ret;
119 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
120
121 BUG_ON(!dev);
122
123 if (!in_pm)
124 fn = usbnet_write_cmd;
125 else
126 fn = usbnet_write_cmd_nopm;
127
128 buf = data;
129 cpu_to_le32s(&buf);
130
131 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
132 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
133 0, index, &buf, 4);
134 if (unlikely(ret < 0))
135 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
136 index, ret);
137
138 return ret;
139 }
140
smsc75xx_read_reg_nopm(struct usbnet * dev,u32 index,u32 * data)141 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
142 u32 *data)
143 {
144 return __smsc75xx_read_reg(dev, index, data, 1);
145 }
146
smsc75xx_write_reg_nopm(struct usbnet * dev,u32 index,u32 data)147 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
148 u32 data)
149 {
150 return __smsc75xx_write_reg(dev, index, data, 1);
151 }
152
smsc75xx_read_reg(struct usbnet * dev,u32 index,u32 * data)153 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
154 u32 *data)
155 {
156 return __smsc75xx_read_reg(dev, index, data, 0);
157 }
158
smsc75xx_write_reg(struct usbnet * dev,u32 index,u32 data)159 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
160 u32 data)
161 {
162 return __smsc75xx_write_reg(dev, index, data, 0);
163 }
164
165 /* Loop until the read is completed with timeout
166 * called with phy_mutex held */
__smsc75xx_phy_wait_not_busy(struct usbnet * dev,int in_pm)167 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
168 int in_pm)
169 {
170 unsigned long start_time = jiffies;
171 u32 val;
172 int ret;
173
174 do {
175 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
176 if (ret < 0) {
177 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
178 return ret;
179 }
180
181 if (!(val & MII_ACCESS_BUSY))
182 return 0;
183 } while (!time_after(jiffies, start_time + HZ));
184
185 return -EIO;
186 }
187
__smsc75xx_mdio_read(struct net_device * netdev,int phy_id,int idx,int in_pm)188 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
189 int in_pm)
190 {
191 struct usbnet *dev = netdev_priv(netdev);
192 u32 val, addr;
193 int ret;
194
195 mutex_lock(&dev->phy_mutex);
196
197 /* confirm MII not busy */
198 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
199 if (ret < 0) {
200 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
201 goto done;
202 }
203
204 /* set the address, index & direction (read from PHY) */
205 phy_id &= dev->mii.phy_id_mask;
206 idx &= dev->mii.reg_num_mask;
207 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
208 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
209 | MII_ACCESS_READ | MII_ACCESS_BUSY;
210 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
211 if (ret < 0) {
212 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
213 goto done;
214 }
215
216 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
217 if (ret < 0) {
218 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
219 goto done;
220 }
221
222 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
223 if (ret < 0) {
224 netdev_warn(dev->net, "Error reading MII_DATA\n");
225 goto done;
226 }
227
228 ret = (u16)(val & 0xFFFF);
229
230 done:
231 mutex_unlock(&dev->phy_mutex);
232 return ret;
233 }
234
__smsc75xx_mdio_write(struct net_device * netdev,int phy_id,int idx,int regval,int in_pm)235 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
236 int idx, int regval, int in_pm)
237 {
238 struct usbnet *dev = netdev_priv(netdev);
239 u32 val, addr;
240 int ret;
241
242 mutex_lock(&dev->phy_mutex);
243
244 /* confirm MII not busy */
245 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
246 if (ret < 0) {
247 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
248 goto done;
249 }
250
251 val = regval;
252 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
253 if (ret < 0) {
254 netdev_warn(dev->net, "Error writing MII_DATA\n");
255 goto done;
256 }
257
258 /* set the address, index & direction (write to PHY) */
259 phy_id &= dev->mii.phy_id_mask;
260 idx &= dev->mii.reg_num_mask;
261 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
262 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
263 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
264 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
265 if (ret < 0) {
266 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
267 goto done;
268 }
269
270 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
271 if (ret < 0) {
272 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
273 goto done;
274 }
275
276 done:
277 mutex_unlock(&dev->phy_mutex);
278 }
279
smsc75xx_mdio_read_nopm(struct net_device * netdev,int phy_id,int idx)280 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
281 int idx)
282 {
283 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
284 }
285
smsc75xx_mdio_write_nopm(struct net_device * netdev,int phy_id,int idx,int regval)286 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
287 int idx, int regval)
288 {
289 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
290 }
291
smsc75xx_mdio_read(struct net_device * netdev,int phy_id,int idx)292 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
293 {
294 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
295 }
296
smsc75xx_mdio_write(struct net_device * netdev,int phy_id,int idx,int regval)297 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
298 int regval)
299 {
300 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
301 }
302
smsc75xx_wait_eeprom(struct usbnet * dev)303 static int smsc75xx_wait_eeprom(struct usbnet *dev)
304 {
305 unsigned long start_time = jiffies;
306 u32 val;
307 int ret;
308
309 do {
310 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
311 if (ret < 0) {
312 netdev_warn(dev->net, "Error reading E2P_CMD\n");
313 return ret;
314 }
315
316 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
317 break;
318 udelay(40);
319 } while (!time_after(jiffies, start_time + HZ));
320
321 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
322 netdev_warn(dev->net, "EEPROM read operation timeout\n");
323 return -EIO;
324 }
325
326 return 0;
327 }
328
smsc75xx_eeprom_confirm_not_busy(struct usbnet * dev)329 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
330 {
331 unsigned long start_time = jiffies;
332 u32 val;
333 int ret;
334
335 do {
336 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
337 if (ret < 0) {
338 netdev_warn(dev->net, "Error reading E2P_CMD\n");
339 return ret;
340 }
341
342 if (!(val & E2P_CMD_BUSY))
343 return 0;
344
345 udelay(40);
346 } while (!time_after(jiffies, start_time + HZ));
347
348 netdev_warn(dev->net, "EEPROM is busy\n");
349 return -EIO;
350 }
351
smsc75xx_read_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)352 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
353 u8 *data)
354 {
355 u32 val;
356 int i, ret;
357
358 BUG_ON(!dev);
359 BUG_ON(!data);
360
361 ret = smsc75xx_eeprom_confirm_not_busy(dev);
362 if (ret)
363 return ret;
364
365 for (i = 0; i < length; i++) {
366 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
367 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
368 if (ret < 0) {
369 netdev_warn(dev->net, "Error writing E2P_CMD\n");
370 return ret;
371 }
372
373 ret = smsc75xx_wait_eeprom(dev);
374 if (ret < 0)
375 return ret;
376
377 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
378 if (ret < 0) {
379 netdev_warn(dev->net, "Error reading E2P_DATA\n");
380 return ret;
381 }
382
383 data[i] = val & 0xFF;
384 offset++;
385 }
386
387 return 0;
388 }
389
smsc75xx_write_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)390 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
391 u8 *data)
392 {
393 u32 val;
394 int i, ret;
395
396 BUG_ON(!dev);
397 BUG_ON(!data);
398
399 ret = smsc75xx_eeprom_confirm_not_busy(dev);
400 if (ret)
401 return ret;
402
403 /* Issue write/erase enable command */
404 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
405 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
406 if (ret < 0) {
407 netdev_warn(dev->net, "Error writing E2P_CMD\n");
408 return ret;
409 }
410
411 ret = smsc75xx_wait_eeprom(dev);
412 if (ret < 0)
413 return ret;
414
415 for (i = 0; i < length; i++) {
416
417 /* Fill data register */
418 val = data[i];
419 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
420 if (ret < 0) {
421 netdev_warn(dev->net, "Error writing E2P_DATA\n");
422 return ret;
423 }
424
425 /* Send "write" command */
426 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
427 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
428 if (ret < 0) {
429 netdev_warn(dev->net, "Error writing E2P_CMD\n");
430 return ret;
431 }
432
433 ret = smsc75xx_wait_eeprom(dev);
434 if (ret < 0)
435 return ret;
436
437 offset++;
438 }
439
440 return 0;
441 }
442
smsc75xx_dataport_wait_not_busy(struct usbnet * dev)443 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
444 {
445 int i, ret;
446
447 for (i = 0; i < 100; i++) {
448 u32 dp_sel;
449 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
450 if (ret < 0) {
451 netdev_warn(dev->net, "Error reading DP_SEL\n");
452 return ret;
453 }
454
455 if (dp_sel & DP_SEL_DPRDY)
456 return 0;
457
458 udelay(40);
459 }
460
461 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
462
463 return -EIO;
464 }
465
smsc75xx_dataport_write(struct usbnet * dev,u32 ram_select,u32 addr,u32 length,u32 * buf)466 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
467 u32 length, u32 *buf)
468 {
469 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
470 u32 dp_sel;
471 int i, ret;
472
473 mutex_lock(&pdata->dataport_mutex);
474
475 ret = smsc75xx_dataport_wait_not_busy(dev);
476 if (ret < 0) {
477 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
478 goto done;
479 }
480
481 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
482 if (ret < 0) {
483 netdev_warn(dev->net, "Error reading DP_SEL\n");
484 goto done;
485 }
486
487 dp_sel &= ~DP_SEL_RSEL;
488 dp_sel |= ram_select;
489 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
490 if (ret < 0) {
491 netdev_warn(dev->net, "Error writing DP_SEL\n");
492 goto done;
493 }
494
495 for (i = 0; i < length; i++) {
496 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
497 if (ret < 0) {
498 netdev_warn(dev->net, "Error writing DP_ADDR\n");
499 goto done;
500 }
501
502 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
503 if (ret < 0) {
504 netdev_warn(dev->net, "Error writing DP_DATA\n");
505 goto done;
506 }
507
508 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
509 if (ret < 0) {
510 netdev_warn(dev->net, "Error writing DP_CMD\n");
511 goto done;
512 }
513
514 ret = smsc75xx_dataport_wait_not_busy(dev);
515 if (ret < 0) {
516 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
517 goto done;
518 }
519 }
520
521 done:
522 mutex_unlock(&pdata->dataport_mutex);
523 return ret;
524 }
525
526 /* returns hash bit number for given MAC address */
smsc75xx_hash(char addr[ETH_ALEN])527 static u32 smsc75xx_hash(char addr[ETH_ALEN])
528 {
529 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
530 }
531
smsc75xx_deferred_multicast_write(struct work_struct * param)532 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
533 {
534 struct smsc75xx_priv *pdata =
535 container_of(param, struct smsc75xx_priv, set_multicast);
536 struct usbnet *dev = pdata->dev;
537 int ret;
538
539 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
540 pdata->rfe_ctl);
541
542 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
543 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
544
545 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
546 if (ret < 0)
547 netdev_warn(dev->net, "Error writing RFE_CRL\n");
548 }
549
smsc75xx_set_multicast(struct net_device * netdev)550 static void smsc75xx_set_multicast(struct net_device *netdev)
551 {
552 struct usbnet *dev = netdev_priv(netdev);
553 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
554 unsigned long flags;
555 int i;
556
557 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
558
559 pdata->rfe_ctl &=
560 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
561 pdata->rfe_ctl |= RFE_CTL_AB;
562
563 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
564 pdata->multicast_hash_table[i] = 0;
565
566 if (dev->net->flags & IFF_PROMISC) {
567 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
568 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
569 } else if (dev->net->flags & IFF_ALLMULTI) {
570 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
571 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
572 } else if (!netdev_mc_empty(dev->net)) {
573 struct netdev_hw_addr *ha;
574
575 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
576
577 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
578
579 netdev_for_each_mc_addr(ha, netdev) {
580 u32 bitnum = smsc75xx_hash(ha->addr);
581 pdata->multicast_hash_table[bitnum / 32] |=
582 (1 << (bitnum % 32));
583 }
584 } else {
585 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
586 pdata->rfe_ctl |= RFE_CTL_DPF;
587 }
588
589 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
590
591 /* defer register writes to a sleepable context */
592 schedule_work(&pdata->set_multicast);
593 }
594
smsc75xx_update_flowcontrol(struct usbnet * dev,u8 duplex,u16 lcladv,u16 rmtadv)595 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
596 u16 lcladv, u16 rmtadv)
597 {
598 u32 flow = 0, fct_flow = 0;
599 int ret;
600
601 if (duplex == DUPLEX_FULL) {
602 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
603
604 if (cap & FLOW_CTRL_TX) {
605 flow = (FLOW_TX_FCEN | 0xFFFF);
606 /* set fct_flow thresholds to 20% and 80% */
607 fct_flow = (8 << 8) | 32;
608 }
609
610 if (cap & FLOW_CTRL_RX)
611 flow |= FLOW_RX_FCEN;
612
613 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
614 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
615 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
616 } else {
617 netif_dbg(dev, link, dev->net, "half duplex\n");
618 }
619
620 ret = smsc75xx_write_reg(dev, FLOW, flow);
621 if (ret < 0) {
622 netdev_warn(dev->net, "Error writing FLOW\n");
623 return ret;
624 }
625
626 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
627 if (ret < 0) {
628 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
629 return ret;
630 }
631
632 return 0;
633 }
634
smsc75xx_link_reset(struct usbnet * dev)635 static int smsc75xx_link_reset(struct usbnet *dev)
636 {
637 struct mii_if_info *mii = &dev->mii;
638 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
639 u16 lcladv, rmtadv;
640 int ret;
641
642 /* write to clear phy interrupt status */
643 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
644 PHY_INT_SRC_CLEAR_ALL);
645
646 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
647 if (ret < 0) {
648 netdev_warn(dev->net, "Error writing INT_STS\n");
649 return ret;
650 }
651
652 mii_check_media(mii, 1, 1);
653 mii_ethtool_gset(&dev->mii, &ecmd);
654 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
655 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
656
657 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
658 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
659
660 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
661 }
662
smsc75xx_status(struct usbnet * dev,struct urb * urb)663 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
664 {
665 u32 intdata;
666
667 if (urb->actual_length != 4) {
668 netdev_warn(dev->net, "unexpected urb length %d\n",
669 urb->actual_length);
670 return;
671 }
672
673 memcpy(&intdata, urb->transfer_buffer, 4);
674 le32_to_cpus(&intdata);
675
676 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
677
678 if (intdata & INT_ENP_PHY_INT)
679 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
680 else
681 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
682 intdata);
683 }
684
smsc75xx_ethtool_get_eeprom_len(struct net_device * net)685 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
686 {
687 return MAX_EEPROM_SIZE;
688 }
689
smsc75xx_ethtool_get_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)690 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
691 struct ethtool_eeprom *ee, u8 *data)
692 {
693 struct usbnet *dev = netdev_priv(netdev);
694
695 ee->magic = LAN75XX_EEPROM_MAGIC;
696
697 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
698 }
699
smsc75xx_ethtool_set_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)700 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
701 struct ethtool_eeprom *ee, u8 *data)
702 {
703 struct usbnet *dev = netdev_priv(netdev);
704
705 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
706 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
707 ee->magic);
708 return -EINVAL;
709 }
710
711 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
712 }
713
smsc75xx_ethtool_get_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)714 static void smsc75xx_ethtool_get_wol(struct net_device *net,
715 struct ethtool_wolinfo *wolinfo)
716 {
717 struct usbnet *dev = netdev_priv(net);
718 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
719
720 wolinfo->supported = SUPPORTED_WAKE;
721 wolinfo->wolopts = pdata->wolopts;
722 }
723
smsc75xx_ethtool_set_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)724 static int smsc75xx_ethtool_set_wol(struct net_device *net,
725 struct ethtool_wolinfo *wolinfo)
726 {
727 struct usbnet *dev = netdev_priv(net);
728 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
729 int ret;
730
731 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
732 return -EINVAL;
733
734 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
735
736 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
737 if (ret < 0)
738 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
739
740 return ret;
741 }
742
743 static const struct ethtool_ops smsc75xx_ethtool_ops = {
744 .get_link = usbnet_get_link,
745 .nway_reset = usbnet_nway_reset,
746 .get_drvinfo = usbnet_get_drvinfo,
747 .get_msglevel = usbnet_get_msglevel,
748 .set_msglevel = usbnet_set_msglevel,
749 .get_settings = usbnet_get_settings,
750 .set_settings = usbnet_set_settings,
751 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
752 .get_eeprom = smsc75xx_ethtool_get_eeprom,
753 .set_eeprom = smsc75xx_ethtool_set_eeprom,
754 .get_wol = smsc75xx_ethtool_get_wol,
755 .set_wol = smsc75xx_ethtool_set_wol,
756 };
757
smsc75xx_ioctl(struct net_device * netdev,struct ifreq * rq,int cmd)758 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
759 {
760 struct usbnet *dev = netdev_priv(netdev);
761
762 if (!netif_running(netdev))
763 return -EINVAL;
764
765 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
766 }
767
smsc75xx_init_mac_address(struct usbnet * dev)768 static void smsc75xx_init_mac_address(struct usbnet *dev)
769 {
770 /* try reading mac address from EEPROM */
771 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
772 dev->net->dev_addr) == 0) {
773 if (is_valid_ether_addr(dev->net->dev_addr)) {
774 /* eeprom values are valid so use them */
775 netif_dbg(dev, ifup, dev->net,
776 "MAC address read from EEPROM\n");
777 return;
778 }
779 }
780
781 /* no eeprom, or eeprom values are invalid. generate random MAC */
782 eth_hw_addr_random(dev->net);
783 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
784 }
785
smsc75xx_set_mac_address(struct usbnet * dev)786 static int smsc75xx_set_mac_address(struct usbnet *dev)
787 {
788 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
789 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
790 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
791
792 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
793 if (ret < 0) {
794 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
795 return ret;
796 }
797
798 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
799 if (ret < 0) {
800 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
801 return ret;
802 }
803
804 addr_hi |= ADDR_FILTX_FB_VALID;
805 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
806 if (ret < 0) {
807 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
808 return ret;
809 }
810
811 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
812 if (ret < 0)
813 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
814
815 return ret;
816 }
817
smsc75xx_phy_initialize(struct usbnet * dev)818 static int smsc75xx_phy_initialize(struct usbnet *dev)
819 {
820 int bmcr, ret, timeout = 0;
821
822 /* Initialize MII structure */
823 dev->mii.dev = dev->net;
824 dev->mii.mdio_read = smsc75xx_mdio_read;
825 dev->mii.mdio_write = smsc75xx_mdio_write;
826 dev->mii.phy_id_mask = 0x1f;
827 dev->mii.reg_num_mask = 0x1f;
828 dev->mii.supports_gmii = 1;
829 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
830
831 /* reset phy and wait for reset to complete */
832 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
833
834 do {
835 msleep(10);
836 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
837 if (bmcr < 0) {
838 netdev_warn(dev->net, "Error reading MII_BMCR\n");
839 return bmcr;
840 }
841 timeout++;
842 } while ((bmcr & BMCR_RESET) && (timeout < 100));
843
844 if (timeout >= 100) {
845 netdev_warn(dev->net, "timeout on PHY Reset\n");
846 return -EIO;
847 }
848
849 /* phy workaround for gig link */
850 smsc75xx_phy_gig_workaround(dev);
851
852 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
853 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
854 ADVERTISE_PAUSE_ASYM);
855 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
856 ADVERTISE_1000FULL);
857
858 /* read and write to clear phy interrupt status */
859 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
860 if (ret < 0) {
861 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
862 return ret;
863 }
864
865 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
866
867 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
868 PHY_INT_MASK_DEFAULT);
869 mii_nway_restart(&dev->mii);
870
871 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
872 return 0;
873 }
874
smsc75xx_set_rx_max_frame_length(struct usbnet * dev,int size)875 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
876 {
877 int ret = 0;
878 u32 buf;
879 bool rxenabled;
880
881 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
882 if (ret < 0) {
883 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
884 return ret;
885 }
886
887 rxenabled = ((buf & MAC_RX_RXEN) != 0);
888
889 if (rxenabled) {
890 buf &= ~MAC_RX_RXEN;
891 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
892 if (ret < 0) {
893 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
894 return ret;
895 }
896 }
897
898 /* add 4 to size for FCS */
899 buf &= ~MAC_RX_MAX_SIZE;
900 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
901
902 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
903 if (ret < 0) {
904 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
905 return ret;
906 }
907
908 if (rxenabled) {
909 buf |= MAC_RX_RXEN;
910 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
911 if (ret < 0) {
912 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
913 return ret;
914 }
915 }
916
917 return 0;
918 }
919
smsc75xx_change_mtu(struct net_device * netdev,int new_mtu)920 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
921 {
922 struct usbnet *dev = netdev_priv(netdev);
923 int ret;
924
925 if (new_mtu > MAX_SINGLE_PACKET_SIZE)
926 return -EINVAL;
927
928 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
929 if (ret < 0) {
930 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
931 return ret;
932 }
933
934 return usbnet_change_mtu(netdev, new_mtu);
935 }
936
937 /* Enable or disable Rx checksum offload engine */
smsc75xx_set_features(struct net_device * netdev,netdev_features_t features)938 static int smsc75xx_set_features(struct net_device *netdev,
939 netdev_features_t features)
940 {
941 struct usbnet *dev = netdev_priv(netdev);
942 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
943 unsigned long flags;
944 int ret;
945
946 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
947
948 if (features & NETIF_F_RXCSUM)
949 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
950 else
951 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
952
953 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
954 /* it's racing here! */
955
956 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
957 if (ret < 0) {
958 netdev_warn(dev->net, "Error writing RFE_CTL\n");
959 return ret;
960 }
961 return 0;
962 }
963
smsc75xx_wait_ready(struct usbnet * dev,int in_pm)964 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
965 {
966 int timeout = 0;
967
968 do {
969 u32 buf;
970 int ret;
971
972 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
973
974 if (ret < 0) {
975 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
976 return ret;
977 }
978
979 if (buf & PMT_CTL_DEV_RDY)
980 return 0;
981
982 msleep(10);
983 timeout++;
984 } while (timeout < 100);
985
986 netdev_warn(dev->net, "timeout waiting for device ready\n");
987 return -EIO;
988 }
989
smsc75xx_phy_gig_workaround(struct usbnet * dev)990 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
991 {
992 struct mii_if_info *mii = &dev->mii;
993 int ret = 0, timeout = 0;
994 u32 buf, link_up = 0;
995
996 /* Set the phy in Gig loopback */
997 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
998
999 /* Wait for the link up */
1000 do {
1001 link_up = smsc75xx_link_ok_nopm(dev);
1002 usleep_range(10000, 20000);
1003 timeout++;
1004 } while ((!link_up) && (timeout < 1000));
1005
1006 if (timeout >= 1000) {
1007 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1008 return -EIO;
1009 }
1010
1011 /* phy reset */
1012 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1013 if (ret < 0) {
1014 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1015 return ret;
1016 }
1017
1018 buf |= PMT_CTL_PHY_RST;
1019
1020 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1021 if (ret < 0) {
1022 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1023 return ret;
1024 }
1025
1026 timeout = 0;
1027 do {
1028 usleep_range(10000, 20000);
1029 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1030 if (ret < 0) {
1031 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1032 ret);
1033 return ret;
1034 }
1035 timeout++;
1036 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1037
1038 if (timeout >= 100) {
1039 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1040 return -EIO;
1041 }
1042
1043 return 0;
1044 }
1045
smsc75xx_reset(struct usbnet * dev)1046 static int smsc75xx_reset(struct usbnet *dev)
1047 {
1048 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1049 u32 buf;
1050 int ret = 0, timeout;
1051
1052 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1053
1054 ret = smsc75xx_wait_ready(dev, 0);
1055 if (ret < 0) {
1056 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1057 return ret;
1058 }
1059
1060 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1061 if (ret < 0) {
1062 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1063 return ret;
1064 }
1065
1066 buf |= HW_CFG_LRST;
1067
1068 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1069 if (ret < 0) {
1070 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1071 return ret;
1072 }
1073
1074 timeout = 0;
1075 do {
1076 msleep(10);
1077 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1078 if (ret < 0) {
1079 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1080 return ret;
1081 }
1082 timeout++;
1083 } while ((buf & HW_CFG_LRST) && (timeout < 100));
1084
1085 if (timeout >= 100) {
1086 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1087 return -EIO;
1088 }
1089
1090 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1091
1092 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1093 if (ret < 0) {
1094 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1095 return ret;
1096 }
1097
1098 buf |= PMT_CTL_PHY_RST;
1099
1100 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1101 if (ret < 0) {
1102 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1103 return ret;
1104 }
1105
1106 timeout = 0;
1107 do {
1108 msleep(10);
1109 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1110 if (ret < 0) {
1111 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1112 return ret;
1113 }
1114 timeout++;
1115 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1116
1117 if (timeout >= 100) {
1118 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1119 return -EIO;
1120 }
1121
1122 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1123
1124 ret = smsc75xx_set_mac_address(dev);
1125 if (ret < 0) {
1126 netdev_warn(dev->net, "Failed to set mac address\n");
1127 return ret;
1128 }
1129
1130 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1131 dev->net->dev_addr);
1132
1133 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1134 if (ret < 0) {
1135 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1136 return ret;
1137 }
1138
1139 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1140 buf);
1141
1142 buf |= HW_CFG_BIR;
1143
1144 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1145 if (ret < 0) {
1146 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1147 return ret;
1148 }
1149
1150 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1151 if (ret < 0) {
1152 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1153 return ret;
1154 }
1155
1156 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1157 buf);
1158
1159 if (!turbo_mode) {
1160 buf = 0;
1161 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1162 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1163 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1164 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1165 } else {
1166 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1167 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1168 }
1169
1170 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1171 (ulong)dev->rx_urb_size);
1172
1173 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1174 if (ret < 0) {
1175 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1176 return ret;
1177 }
1178
1179 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1180 if (ret < 0) {
1181 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1182 return ret;
1183 }
1184
1185 netif_dbg(dev, ifup, dev->net,
1186 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1187
1188 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1189 if (ret < 0) {
1190 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1191 return ret;
1192 }
1193
1194 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1195 if (ret < 0) {
1196 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1197 return ret;
1198 }
1199
1200 netif_dbg(dev, ifup, dev->net,
1201 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1202
1203 if (turbo_mode) {
1204 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1205 if (ret < 0) {
1206 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1207 return ret;
1208 }
1209
1210 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1211
1212 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1213
1214 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1215 if (ret < 0) {
1216 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1217 return ret;
1218 }
1219
1220 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1221 if (ret < 0) {
1222 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1223 return ret;
1224 }
1225
1226 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1227 }
1228
1229 /* set FIFO sizes */
1230 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1231 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1232 if (ret < 0) {
1233 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1234 return ret;
1235 }
1236
1237 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1238
1239 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1240 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1241 if (ret < 0) {
1242 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1243 return ret;
1244 }
1245
1246 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1247
1248 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1249 if (ret < 0) {
1250 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1251 return ret;
1252 }
1253
1254 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1255 if (ret < 0) {
1256 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1257 return ret;
1258 }
1259
1260 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1261
1262 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1263 if (ret < 0) {
1264 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1265 return ret;
1266 }
1267
1268 /* only set default GPIO/LED settings if no EEPROM is detected */
1269 if (!(buf & E2P_CMD_LOADED)) {
1270 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1271 if (ret < 0) {
1272 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1273 return ret;
1274 }
1275
1276 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1277 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1278
1279 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1280 if (ret < 0) {
1281 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1282 return ret;
1283 }
1284 }
1285
1286 ret = smsc75xx_write_reg(dev, FLOW, 0);
1287 if (ret < 0) {
1288 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1289 return ret;
1290 }
1291
1292 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1293 if (ret < 0) {
1294 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1295 return ret;
1296 }
1297
1298 /* Don't need rfe_ctl_lock during initialisation */
1299 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1300 if (ret < 0) {
1301 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1302 return ret;
1303 }
1304
1305 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1306
1307 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1308 if (ret < 0) {
1309 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1310 return ret;
1311 }
1312
1313 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1314 if (ret < 0) {
1315 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1316 return ret;
1317 }
1318
1319 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1320 pdata->rfe_ctl);
1321
1322 /* Enable or disable checksum offload engines */
1323 smsc75xx_set_features(dev->net, dev->net->features);
1324
1325 smsc75xx_set_multicast(dev->net);
1326
1327 ret = smsc75xx_phy_initialize(dev);
1328 if (ret < 0) {
1329 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1330 return ret;
1331 }
1332
1333 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1334 if (ret < 0) {
1335 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1336 return ret;
1337 }
1338
1339 /* enable PHY interrupts */
1340 buf |= INT_ENP_PHY_INT;
1341
1342 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1343 if (ret < 0) {
1344 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1345 return ret;
1346 }
1347
1348 /* allow mac to detect speed and duplex from phy */
1349 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1350 if (ret < 0) {
1351 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1352 return ret;
1353 }
1354
1355 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1356 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1357 if (ret < 0) {
1358 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1359 return ret;
1360 }
1361
1362 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1363 if (ret < 0) {
1364 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1365 return ret;
1366 }
1367
1368 buf |= MAC_TX_TXEN;
1369
1370 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1371 if (ret < 0) {
1372 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1373 return ret;
1374 }
1375
1376 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1377
1378 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1379 if (ret < 0) {
1380 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1381 return ret;
1382 }
1383
1384 buf |= FCT_TX_CTL_EN;
1385
1386 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1387 if (ret < 0) {
1388 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1389 return ret;
1390 }
1391
1392 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1393
1394 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1395 if (ret < 0) {
1396 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1397 return ret;
1398 }
1399
1400 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1401 if (ret < 0) {
1402 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1403 return ret;
1404 }
1405
1406 buf |= MAC_RX_RXEN;
1407
1408 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1409 if (ret < 0) {
1410 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1411 return ret;
1412 }
1413
1414 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1415
1416 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1417 if (ret < 0) {
1418 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1419 return ret;
1420 }
1421
1422 buf |= FCT_RX_CTL_EN;
1423
1424 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1425 if (ret < 0) {
1426 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1427 return ret;
1428 }
1429
1430 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1431
1432 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1433 return 0;
1434 }
1435
1436 static const struct net_device_ops smsc75xx_netdev_ops = {
1437 .ndo_open = usbnet_open,
1438 .ndo_stop = usbnet_stop,
1439 .ndo_start_xmit = usbnet_start_xmit,
1440 .ndo_tx_timeout = usbnet_tx_timeout,
1441 .ndo_change_mtu = smsc75xx_change_mtu,
1442 .ndo_set_mac_address = eth_mac_addr,
1443 .ndo_validate_addr = eth_validate_addr,
1444 .ndo_do_ioctl = smsc75xx_ioctl,
1445 .ndo_set_rx_mode = smsc75xx_set_multicast,
1446 .ndo_set_features = smsc75xx_set_features,
1447 };
1448
smsc75xx_bind(struct usbnet * dev,struct usb_interface * intf)1449 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1450 {
1451 struct smsc75xx_priv *pdata = NULL;
1452 int ret;
1453
1454 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1455
1456 ret = usbnet_get_endpoints(dev, intf);
1457 if (ret < 0) {
1458 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1459 return ret;
1460 }
1461
1462 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1463 GFP_KERNEL);
1464
1465 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1466 if (!pdata)
1467 return -ENOMEM;
1468
1469 pdata->dev = dev;
1470
1471 spin_lock_init(&pdata->rfe_ctl_lock);
1472 mutex_init(&pdata->dataport_mutex);
1473
1474 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1475
1476 if (DEFAULT_TX_CSUM_ENABLE)
1477 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1478
1479 if (DEFAULT_RX_CSUM_ENABLE)
1480 dev->net->features |= NETIF_F_RXCSUM;
1481
1482 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1483 NETIF_F_RXCSUM;
1484
1485 ret = smsc75xx_wait_ready(dev, 0);
1486 if (ret < 0) {
1487 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1488 goto free_pdata;
1489 }
1490
1491 smsc75xx_init_mac_address(dev);
1492
1493 /* Init all registers */
1494 ret = smsc75xx_reset(dev);
1495 if (ret < 0) {
1496 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1497 goto cancel_work;
1498 }
1499
1500 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1501 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1502 dev->net->flags |= IFF_MULTICAST;
1503 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1504 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1505 return 0;
1506
1507 cancel_work:
1508 cancel_work_sync(&pdata->set_multicast);
1509 free_pdata:
1510 kfree(pdata);
1511 dev->data[0] = 0;
1512 return ret;
1513 }
1514
smsc75xx_unbind(struct usbnet * dev,struct usb_interface * intf)1515 static 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
smsc_crc(const u8 * buffer,size_t len)1526 static u16 smsc_crc(const u8 *buffer, size_t len)
1527 {
1528 return bitrev16(crc16(0xFFFF, buffer, len));
1529 }
1530
smsc75xx_write_wuff(struct usbnet * dev,int filter,u32 wuf_cfg,u32 wuf_mask1)1531 static 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
smsc75xx_enter_suspend0(struct usbnet * dev)1571 static 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
smsc75xx_enter_suspend1(struct usbnet * dev)1597 static 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
smsc75xx_enter_suspend2(struct usbnet * dev)1633 static 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
smsc75xx_enter_suspend3(struct usbnet * dev)1659 static 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
smsc75xx_enable_phy_wakeup_interrupts(struct usbnet * dev,u16 mask)1706 static 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
smsc75xx_link_ok_nopm(struct usbnet * dev)1734 static 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
smsc75xx_autosuspend(struct usbnet * dev,u32 link_up)1755 static 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
smsc75xx_suspend(struct usb_interface * intf,pm_message_t message)1793 static 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
2084 done:
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
smsc75xx_resume(struct usb_interface * intf)2094 static 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
smsc75xx_rx_csum_offload(struct usbnet * dev,struct sk_buff * skb,u32 rx_cmd_a,u32 rx_cmd_b)2168 static 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
smsc75xx_rx_fixup(struct usbnet * dev,struct sk_buff * skb)2180 static 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 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2192 le32_to_cpus(&rx_cmd_a);
2193 skb_pull(skb, 4);
2194
2195 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2196 le32_to_cpus(&rx_cmd_b);
2197 skb_pull(skb, 4 + RXW_PADDING);
2198
2199 packet = skb->data;
2200
2201 /* get the packet length */
2202 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2203 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2204
2205 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2206 netif_dbg(dev, rx_err, dev->net,
2207 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2208 dev->net->stats.rx_errors++;
2209 dev->net->stats.rx_dropped++;
2210
2211 if (rx_cmd_a & RX_CMD_A_FCS)
2212 dev->net->stats.rx_crc_errors++;
2213 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2214 dev->net->stats.rx_frame_errors++;
2215 } else {
2216 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2217 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2218 netif_dbg(dev, rx_err, dev->net,
2219 "size err rx_cmd_a=0x%08x\n",
2220 rx_cmd_a);
2221 return 0;
2222 }
2223
2224 /* last frame in this batch */
2225 if (skb->len == size) {
2226 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2227 rx_cmd_b);
2228
2229 skb_trim(skb, skb->len - 4); /* remove fcs */
2230 skb->truesize = size + sizeof(struct sk_buff);
2231
2232 return 1;
2233 }
2234
2235 ax_skb = skb_clone(skb, GFP_ATOMIC);
2236 if (unlikely(!ax_skb)) {
2237 netdev_warn(dev->net, "Error allocating skb\n");
2238 return 0;
2239 }
2240
2241 ax_skb->len = size;
2242 ax_skb->data = packet;
2243 skb_set_tail_pointer(ax_skb, size);
2244
2245 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2246 rx_cmd_b);
2247
2248 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2249 ax_skb->truesize = size + sizeof(struct sk_buff);
2250
2251 usbnet_skb_return(dev, ax_skb);
2252 }
2253
2254 skb_pull(skb, size);
2255
2256 /* padding bytes before the next frame starts */
2257 if (skb->len)
2258 skb_pull(skb, align_count);
2259 }
2260
2261 return 1;
2262 }
2263
smsc75xx_tx_fixup(struct usbnet * dev,struct sk_buff * skb,gfp_t flags)2264 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2265 struct sk_buff *skb, gfp_t flags)
2266 {
2267 u32 tx_cmd_a, tx_cmd_b;
2268
2269 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2270 dev_kfree_skb_any(skb);
2271 return NULL;
2272 }
2273
2274 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2275
2276 if (skb->ip_summed == CHECKSUM_PARTIAL)
2277 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2278
2279 if (skb_is_gso(skb)) {
2280 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2281 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2282
2283 tx_cmd_a |= TX_CMD_A_LSO;
2284 } else {
2285 tx_cmd_b = 0;
2286 }
2287
2288 skb_push(skb, 4);
2289 cpu_to_le32s(&tx_cmd_b);
2290 memcpy(skb->data, &tx_cmd_b, 4);
2291
2292 skb_push(skb, 4);
2293 cpu_to_le32s(&tx_cmd_a);
2294 memcpy(skb->data, &tx_cmd_a, 4);
2295
2296 return skb;
2297 }
2298
smsc75xx_manage_power(struct usbnet * dev,int on)2299 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2300 {
2301 dev->intf->needs_remote_wakeup = on;
2302 return 0;
2303 }
2304
2305 static const struct driver_info smsc75xx_info = {
2306 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
2307 .bind = smsc75xx_bind,
2308 .unbind = smsc75xx_unbind,
2309 .link_reset = smsc75xx_link_reset,
2310 .reset = smsc75xx_reset,
2311 .rx_fixup = smsc75xx_rx_fixup,
2312 .tx_fixup = smsc75xx_tx_fixup,
2313 .status = smsc75xx_status,
2314 .manage_power = smsc75xx_manage_power,
2315 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2316 };
2317
2318 static const struct usb_device_id products[] = {
2319 {
2320 /* SMSC7500 USB Gigabit Ethernet Device */
2321 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2322 .driver_info = (unsigned long) &smsc75xx_info,
2323 },
2324 {
2325 /* SMSC7500 USB Gigabit Ethernet Device */
2326 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2327 .driver_info = (unsigned long) &smsc75xx_info,
2328 },
2329 { }, /* END */
2330 };
2331 MODULE_DEVICE_TABLE(usb, products);
2332
2333 static struct usb_driver smsc75xx_driver = {
2334 .name = SMSC_CHIPNAME,
2335 .id_table = products,
2336 .probe = usbnet_probe,
2337 .suspend = smsc75xx_suspend,
2338 .resume = smsc75xx_resume,
2339 .reset_resume = smsc75xx_resume,
2340 .disconnect = usbnet_disconnect,
2341 .disable_hub_initiated_lpm = 1,
2342 .supports_autosuspend = 1,
2343 };
2344
2345 module_usb_driver(smsc75xx_driver);
2346
2347 MODULE_AUTHOR("Nancy Lin");
2348 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2349 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2350 MODULE_LICENSE("GPL");
2351