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
53 struct 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
64 struct usb_context {
65 struct usb_ctrlrequest req;
66 struct usbnet *dev;
67 };
68
69 static bool turbo_mode = true;
70 module_param(turbo_mode, bool, 0644);
71 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
72
73 static int smsc75xx_link_ok_nopm(struct usbnet *dev);
74 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
75
__smsc75xx_read_reg(struct usbnet * dev,u32 index,u32 * data,int in_pm)76 static 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 < 4)) {
94 ret = ret < 0 ? ret : -ENODATA;
95
96 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
97 index, ret);
98 return ret;
99 }
100
101 le32_to_cpus(&buf);
102 *data = buf;
103
104 return ret;
105 }
106
__smsc75xx_write_reg(struct usbnet * dev,u32 index,u32 data,int in_pm)107 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
108 u32 data, int in_pm)
109 {
110 u32 buf;
111 int ret;
112 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
113
114 BUG_ON(!dev);
115
116 if (!in_pm)
117 fn = usbnet_write_cmd;
118 else
119 fn = usbnet_write_cmd_nopm;
120
121 buf = data;
122 cpu_to_le32s(&buf);
123
124 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
125 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
126 0, index, &buf, 4);
127 if (unlikely(ret < 0))
128 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
129 index, ret);
130
131 return ret;
132 }
133
smsc75xx_read_reg_nopm(struct usbnet * dev,u32 index,u32 * data)134 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
135 u32 *data)
136 {
137 return __smsc75xx_read_reg(dev, index, data, 1);
138 }
139
smsc75xx_write_reg_nopm(struct usbnet * dev,u32 index,u32 data)140 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
141 u32 data)
142 {
143 return __smsc75xx_write_reg(dev, index, data, 1);
144 }
145
smsc75xx_read_reg(struct usbnet * dev,u32 index,u32 * data)146 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
147 u32 *data)
148 {
149 return __smsc75xx_read_reg(dev, index, data, 0);
150 }
151
smsc75xx_write_reg(struct usbnet * dev,u32 index,u32 data)152 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
153 u32 data)
154 {
155 return __smsc75xx_write_reg(dev, index, data, 0);
156 }
157
158 /* Loop until the read is completed with timeout
159 * called with phy_mutex held */
__smsc75xx_phy_wait_not_busy(struct usbnet * dev,int in_pm)160 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
161 int in_pm)
162 {
163 unsigned long start_time = jiffies;
164 u32 val;
165 int ret;
166
167 do {
168 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
169 if (ret < 0) {
170 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
171 return ret;
172 }
173
174 if (!(val & MII_ACCESS_BUSY))
175 return 0;
176 } while (!time_after(jiffies, start_time + HZ));
177
178 return -EIO;
179 }
180
__smsc75xx_mdio_read(struct net_device * netdev,int phy_id,int idx,int in_pm)181 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
182 int in_pm)
183 {
184 struct usbnet *dev = netdev_priv(netdev);
185 u32 val, addr;
186 int ret;
187
188 mutex_lock(&dev->phy_mutex);
189
190 /* confirm MII not busy */
191 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
192 if (ret < 0) {
193 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
194 goto done;
195 }
196
197 /* set the address, index & direction (read from PHY) */
198 phy_id &= dev->mii.phy_id_mask;
199 idx &= dev->mii.reg_num_mask;
200 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
201 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
202 | MII_ACCESS_READ | MII_ACCESS_BUSY;
203 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
204 if (ret < 0) {
205 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
206 goto done;
207 }
208
209 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
210 if (ret < 0) {
211 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
212 goto done;
213 }
214
215 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
216 if (ret < 0) {
217 netdev_warn(dev->net, "Error reading MII_DATA\n");
218 goto done;
219 }
220
221 ret = (u16)(val & 0xFFFF);
222
223 done:
224 mutex_unlock(&dev->phy_mutex);
225 return ret;
226 }
227
__smsc75xx_mdio_write(struct net_device * netdev,int phy_id,int idx,int regval,int in_pm)228 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
229 int idx, int regval, int in_pm)
230 {
231 struct usbnet *dev = netdev_priv(netdev);
232 u32 val, addr;
233 int ret;
234
235 mutex_lock(&dev->phy_mutex);
236
237 /* confirm MII not busy */
238 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
239 if (ret < 0) {
240 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
241 goto done;
242 }
243
244 val = regval;
245 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
246 if (ret < 0) {
247 netdev_warn(dev->net, "Error writing MII_DATA\n");
248 goto done;
249 }
250
251 /* set the address, index & direction (write to PHY) */
252 phy_id &= dev->mii.phy_id_mask;
253 idx &= dev->mii.reg_num_mask;
254 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
255 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
256 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
257 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
258 if (ret < 0) {
259 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
260 goto done;
261 }
262
263 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
264 if (ret < 0) {
265 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
266 goto done;
267 }
268
269 done:
270 mutex_unlock(&dev->phy_mutex);
271 }
272
smsc75xx_mdio_read_nopm(struct net_device * netdev,int phy_id,int idx)273 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
274 int idx)
275 {
276 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
277 }
278
smsc75xx_mdio_write_nopm(struct net_device * netdev,int phy_id,int idx,int regval)279 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
280 int idx, int regval)
281 {
282 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
283 }
284
smsc75xx_mdio_read(struct net_device * netdev,int phy_id,int idx)285 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
286 {
287 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
288 }
289
smsc75xx_mdio_write(struct net_device * netdev,int phy_id,int idx,int regval)290 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
291 int regval)
292 {
293 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
294 }
295
smsc75xx_wait_eeprom(struct usbnet * dev)296 static int smsc75xx_wait_eeprom(struct usbnet *dev)
297 {
298 unsigned long start_time = jiffies;
299 u32 val;
300 int ret;
301
302 do {
303 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
304 if (ret < 0) {
305 netdev_warn(dev->net, "Error reading E2P_CMD\n");
306 return ret;
307 }
308
309 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
310 break;
311 udelay(40);
312 } while (!time_after(jiffies, start_time + HZ));
313
314 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
315 netdev_warn(dev->net, "EEPROM read operation timeout\n");
316 return -EIO;
317 }
318
319 return 0;
320 }
321
smsc75xx_eeprom_confirm_not_busy(struct usbnet * dev)322 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
323 {
324 unsigned long start_time = jiffies;
325 u32 val;
326 int ret;
327
328 do {
329 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
330 if (ret < 0) {
331 netdev_warn(dev->net, "Error reading E2P_CMD\n");
332 return ret;
333 }
334
335 if (!(val & E2P_CMD_BUSY))
336 return 0;
337
338 udelay(40);
339 } while (!time_after(jiffies, start_time + HZ));
340
341 netdev_warn(dev->net, "EEPROM is busy\n");
342 return -EIO;
343 }
344
smsc75xx_read_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)345 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
346 u8 *data)
347 {
348 u32 val;
349 int i, ret;
350
351 BUG_ON(!dev);
352 BUG_ON(!data);
353
354 ret = smsc75xx_eeprom_confirm_not_busy(dev);
355 if (ret)
356 return ret;
357
358 for (i = 0; i < length; i++) {
359 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
360 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
361 if (ret < 0) {
362 netdev_warn(dev->net, "Error writing E2P_CMD\n");
363 return ret;
364 }
365
366 ret = smsc75xx_wait_eeprom(dev);
367 if (ret < 0)
368 return ret;
369
370 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
371 if (ret < 0) {
372 netdev_warn(dev->net, "Error reading E2P_DATA\n");
373 return ret;
374 }
375
376 data[i] = val & 0xFF;
377 offset++;
378 }
379
380 return 0;
381 }
382
smsc75xx_write_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)383 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
384 u8 *data)
385 {
386 u32 val;
387 int i, ret;
388
389 BUG_ON(!dev);
390 BUG_ON(!data);
391
392 ret = smsc75xx_eeprom_confirm_not_busy(dev);
393 if (ret)
394 return ret;
395
396 /* Issue write/erase enable command */
397 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
398 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
399 if (ret < 0) {
400 netdev_warn(dev->net, "Error writing E2P_CMD\n");
401 return ret;
402 }
403
404 ret = smsc75xx_wait_eeprom(dev);
405 if (ret < 0)
406 return ret;
407
408 for (i = 0; i < length; i++) {
409
410 /* Fill data register */
411 val = data[i];
412 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
413 if (ret < 0) {
414 netdev_warn(dev->net, "Error writing E2P_DATA\n");
415 return ret;
416 }
417
418 /* Send "write" command */
419 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
420 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
421 if (ret < 0) {
422 netdev_warn(dev->net, "Error writing E2P_CMD\n");
423 return ret;
424 }
425
426 ret = smsc75xx_wait_eeprom(dev);
427 if (ret < 0)
428 return ret;
429
430 offset++;
431 }
432
433 return 0;
434 }
435
smsc75xx_dataport_wait_not_busy(struct usbnet * dev)436 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
437 {
438 int i, ret;
439
440 for (i = 0; i < 100; i++) {
441 u32 dp_sel;
442 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
443 if (ret < 0) {
444 netdev_warn(dev->net, "Error reading DP_SEL\n");
445 return ret;
446 }
447
448 if (dp_sel & DP_SEL_DPRDY)
449 return 0;
450
451 udelay(40);
452 }
453
454 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
455
456 return -EIO;
457 }
458
smsc75xx_dataport_write(struct usbnet * dev,u32 ram_select,u32 addr,u32 length,u32 * buf)459 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
460 u32 length, u32 *buf)
461 {
462 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
463 u32 dp_sel;
464 int i, ret;
465
466 mutex_lock(&pdata->dataport_mutex);
467
468 ret = smsc75xx_dataport_wait_not_busy(dev);
469 if (ret < 0) {
470 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
471 goto done;
472 }
473
474 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
475 if (ret < 0) {
476 netdev_warn(dev->net, "Error reading DP_SEL\n");
477 goto done;
478 }
479
480 dp_sel &= ~DP_SEL_RSEL;
481 dp_sel |= ram_select;
482 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
483 if (ret < 0) {
484 netdev_warn(dev->net, "Error writing DP_SEL\n");
485 goto done;
486 }
487
488 for (i = 0; i < length; i++) {
489 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
490 if (ret < 0) {
491 netdev_warn(dev->net, "Error writing DP_ADDR\n");
492 goto done;
493 }
494
495 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
496 if (ret < 0) {
497 netdev_warn(dev->net, "Error writing DP_DATA\n");
498 goto done;
499 }
500
501 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
502 if (ret < 0) {
503 netdev_warn(dev->net, "Error writing DP_CMD\n");
504 goto done;
505 }
506
507 ret = smsc75xx_dataport_wait_not_busy(dev);
508 if (ret < 0) {
509 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
510 goto done;
511 }
512 }
513
514 done:
515 mutex_unlock(&pdata->dataport_mutex);
516 return ret;
517 }
518
519 /* returns hash bit number for given MAC address */
smsc75xx_hash(char addr[ETH_ALEN])520 static u32 smsc75xx_hash(char addr[ETH_ALEN])
521 {
522 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
523 }
524
smsc75xx_deferred_multicast_write(struct work_struct * param)525 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
526 {
527 struct smsc75xx_priv *pdata =
528 container_of(param, struct smsc75xx_priv, set_multicast);
529 struct usbnet *dev = pdata->dev;
530 int ret;
531
532 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
533 pdata->rfe_ctl);
534
535 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
536 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
537
538 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
539 if (ret < 0)
540 netdev_warn(dev->net, "Error writing RFE_CRL\n");
541 }
542
smsc75xx_set_multicast(struct net_device * netdev)543 static void smsc75xx_set_multicast(struct net_device *netdev)
544 {
545 struct usbnet *dev = netdev_priv(netdev);
546 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
547 unsigned long flags;
548 int i;
549
550 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
551
552 pdata->rfe_ctl &=
553 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
554 pdata->rfe_ctl |= RFE_CTL_AB;
555
556 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
557 pdata->multicast_hash_table[i] = 0;
558
559 if (dev->net->flags & IFF_PROMISC) {
560 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
561 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
562 } else if (dev->net->flags & IFF_ALLMULTI) {
563 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
564 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
565 } else if (!netdev_mc_empty(dev->net)) {
566 struct netdev_hw_addr *ha;
567
568 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
569
570 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
571
572 netdev_for_each_mc_addr(ha, netdev) {
573 u32 bitnum = smsc75xx_hash(ha->addr);
574 pdata->multicast_hash_table[bitnum / 32] |=
575 (1 << (bitnum % 32));
576 }
577 } else {
578 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
579 pdata->rfe_ctl |= RFE_CTL_DPF;
580 }
581
582 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
583
584 /* defer register writes to a sleepable context */
585 schedule_work(&pdata->set_multicast);
586 }
587
smsc75xx_update_flowcontrol(struct usbnet * dev,u8 duplex,u16 lcladv,u16 rmtadv)588 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
589 u16 lcladv, u16 rmtadv)
590 {
591 u32 flow = 0, fct_flow = 0;
592 int ret;
593
594 if (duplex == DUPLEX_FULL) {
595 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
596
597 if (cap & FLOW_CTRL_TX) {
598 flow = (FLOW_TX_FCEN | 0xFFFF);
599 /* set fct_flow thresholds to 20% and 80% */
600 fct_flow = (8 << 8) | 32;
601 }
602
603 if (cap & FLOW_CTRL_RX)
604 flow |= FLOW_RX_FCEN;
605
606 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
607 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
608 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
609 } else {
610 netif_dbg(dev, link, dev->net, "half duplex\n");
611 }
612
613 ret = smsc75xx_write_reg(dev, FLOW, flow);
614 if (ret < 0) {
615 netdev_warn(dev->net, "Error writing FLOW\n");
616 return ret;
617 }
618
619 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
620 if (ret < 0) {
621 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
622 return ret;
623 }
624
625 return 0;
626 }
627
smsc75xx_link_reset(struct usbnet * dev)628 static int smsc75xx_link_reset(struct usbnet *dev)
629 {
630 struct mii_if_info *mii = &dev->mii;
631 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
632 u16 lcladv, rmtadv;
633 int ret;
634
635 /* write to clear phy interrupt status */
636 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
637 PHY_INT_SRC_CLEAR_ALL);
638
639 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
640 if (ret < 0) {
641 netdev_warn(dev->net, "Error writing INT_STS\n");
642 return ret;
643 }
644
645 mii_check_media(mii, 1, 1);
646 mii_ethtool_gset(&dev->mii, &ecmd);
647 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
648 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
649
650 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
651 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
652
653 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
654 }
655
smsc75xx_status(struct usbnet * dev,struct urb * urb)656 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
657 {
658 u32 intdata;
659
660 if (urb->actual_length != 4) {
661 netdev_warn(dev->net, "unexpected urb length %d\n",
662 urb->actual_length);
663 return;
664 }
665
666 intdata = get_unaligned_le32(urb->transfer_buffer);
667
668 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
669
670 if (intdata & INT_ENP_PHY_INT)
671 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
672 else
673 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
674 intdata);
675 }
676
smsc75xx_ethtool_get_eeprom_len(struct net_device * net)677 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
678 {
679 return MAX_EEPROM_SIZE;
680 }
681
smsc75xx_ethtool_get_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)682 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
683 struct ethtool_eeprom *ee, u8 *data)
684 {
685 struct usbnet *dev = netdev_priv(netdev);
686
687 ee->magic = LAN75XX_EEPROM_MAGIC;
688
689 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
690 }
691
smsc75xx_ethtool_set_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)692 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
693 struct ethtool_eeprom *ee, u8 *data)
694 {
695 struct usbnet *dev = netdev_priv(netdev);
696
697 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
698 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
699 ee->magic);
700 return -EINVAL;
701 }
702
703 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
704 }
705
smsc75xx_ethtool_get_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)706 static void smsc75xx_ethtool_get_wol(struct net_device *net,
707 struct ethtool_wolinfo *wolinfo)
708 {
709 struct usbnet *dev = netdev_priv(net);
710 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
711
712 wolinfo->supported = SUPPORTED_WAKE;
713 wolinfo->wolopts = pdata->wolopts;
714 }
715
smsc75xx_ethtool_set_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)716 static int smsc75xx_ethtool_set_wol(struct net_device *net,
717 struct ethtool_wolinfo *wolinfo)
718 {
719 struct usbnet *dev = netdev_priv(net);
720 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
721 int ret;
722
723 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
724 return -EINVAL;
725
726 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
727
728 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
729 if (ret < 0)
730 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
731
732 return ret;
733 }
734
735 static const struct ethtool_ops smsc75xx_ethtool_ops = {
736 .get_link = usbnet_get_link,
737 .nway_reset = usbnet_nway_reset,
738 .get_drvinfo = usbnet_get_drvinfo,
739 .get_msglevel = usbnet_get_msglevel,
740 .set_msglevel = usbnet_set_msglevel,
741 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
742 .get_eeprom = smsc75xx_ethtool_get_eeprom,
743 .set_eeprom = smsc75xx_ethtool_set_eeprom,
744 .get_wol = smsc75xx_ethtool_get_wol,
745 .set_wol = smsc75xx_ethtool_set_wol,
746 .get_link_ksettings = usbnet_get_link_ksettings_mii,
747 .set_link_ksettings = usbnet_set_link_ksettings_mii,
748 };
749
smsc75xx_ioctl(struct net_device * netdev,struct ifreq * rq,int cmd)750 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
751 {
752 struct usbnet *dev = netdev_priv(netdev);
753
754 if (!netif_running(netdev))
755 return -EINVAL;
756
757 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
758 }
759
smsc75xx_init_mac_address(struct usbnet * dev)760 static void smsc75xx_init_mac_address(struct usbnet *dev)
761 {
762 /* maybe the boot loader passed the MAC address in devicetree */
763 if (!eth_platform_get_mac_address(&dev->udev->dev,
764 dev->net->dev_addr)) {
765 if (is_valid_ether_addr(dev->net->dev_addr)) {
766 /* device tree values are valid so use them */
767 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
768 return;
769 }
770 }
771
772 /* try reading mac address from EEPROM */
773 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
774 dev->net->dev_addr) == 0) {
775 if (is_valid_ether_addr(dev->net->dev_addr)) {
776 /* eeprom values are valid so use them */
777 netif_dbg(dev, ifup, dev->net,
778 "MAC address read from EEPROM\n");
779 return;
780 }
781 }
782
783 /* no useful static MAC address found. generate a random one */
784 eth_hw_addr_random(dev->net);
785 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
786 }
787
smsc75xx_set_mac_address(struct usbnet * dev)788 static int smsc75xx_set_mac_address(struct usbnet *dev)
789 {
790 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
791 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
792 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
793
794 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
795 if (ret < 0) {
796 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
797 return ret;
798 }
799
800 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
801 if (ret < 0) {
802 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
803 return ret;
804 }
805
806 addr_hi |= ADDR_FILTX_FB_VALID;
807 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
808 if (ret < 0) {
809 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
810 return ret;
811 }
812
813 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
814 if (ret < 0)
815 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
816
817 return ret;
818 }
819
smsc75xx_phy_initialize(struct usbnet * dev)820 static int smsc75xx_phy_initialize(struct usbnet *dev)
821 {
822 int bmcr, ret, timeout = 0;
823
824 /* Initialize MII structure */
825 dev->mii.dev = dev->net;
826 dev->mii.mdio_read = smsc75xx_mdio_read;
827 dev->mii.mdio_write = smsc75xx_mdio_write;
828 dev->mii.phy_id_mask = 0x1f;
829 dev->mii.reg_num_mask = 0x1f;
830 dev->mii.supports_gmii = 1;
831 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
832
833 /* reset phy and wait for reset to complete */
834 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
835
836 do {
837 msleep(10);
838 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
839 if (bmcr < 0) {
840 netdev_warn(dev->net, "Error reading MII_BMCR\n");
841 return bmcr;
842 }
843 timeout++;
844 } while ((bmcr & BMCR_RESET) && (timeout < 100));
845
846 if (timeout >= 100) {
847 netdev_warn(dev->net, "timeout on PHY Reset\n");
848 return -EIO;
849 }
850
851 /* phy workaround for gig link */
852 smsc75xx_phy_gig_workaround(dev);
853
854 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
855 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
856 ADVERTISE_PAUSE_ASYM);
857 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
858 ADVERTISE_1000FULL);
859
860 /* read and write to clear phy interrupt status */
861 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
862 if (ret < 0) {
863 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
864 return ret;
865 }
866
867 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
868
869 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
870 PHY_INT_MASK_DEFAULT);
871 mii_nway_restart(&dev->mii);
872
873 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
874 return 0;
875 }
876
smsc75xx_set_rx_max_frame_length(struct usbnet * dev,int size)877 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
878 {
879 int ret = 0;
880 u32 buf;
881 bool rxenabled;
882
883 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
884 if (ret < 0) {
885 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
886 return ret;
887 }
888
889 rxenabled = ((buf & MAC_RX_RXEN) != 0);
890
891 if (rxenabled) {
892 buf &= ~MAC_RX_RXEN;
893 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
894 if (ret < 0) {
895 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
896 return ret;
897 }
898 }
899
900 /* add 4 to size for FCS */
901 buf &= ~MAC_RX_MAX_SIZE;
902 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
903
904 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
905 if (ret < 0) {
906 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
907 return ret;
908 }
909
910 if (rxenabled) {
911 buf |= MAC_RX_RXEN;
912 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
913 if (ret < 0) {
914 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
915 return ret;
916 }
917 }
918
919 return 0;
920 }
921
smsc75xx_change_mtu(struct net_device * netdev,int new_mtu)922 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
923 {
924 struct usbnet *dev = netdev_priv(netdev);
925 int ret;
926
927 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
928 if (ret < 0) {
929 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
930 return ret;
931 }
932
933 return usbnet_change_mtu(netdev, new_mtu);
934 }
935
936 /* Enable or disable Rx checksum offload engine */
smsc75xx_set_features(struct net_device * netdev,netdev_features_t features)937 static int smsc75xx_set_features(struct net_device *netdev,
938 netdev_features_t features)
939 {
940 struct usbnet *dev = netdev_priv(netdev);
941 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
942 unsigned long flags;
943 int ret;
944
945 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
946
947 if (features & NETIF_F_RXCSUM)
948 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
949 else
950 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
951
952 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
953 /* it's racing here! */
954
955 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
956 if (ret < 0) {
957 netdev_warn(dev->net, "Error writing RFE_CTL\n");
958 return ret;
959 }
960 return 0;
961 }
962
smsc75xx_wait_ready(struct usbnet * dev,int in_pm)963 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
964 {
965 int timeout = 0;
966
967 do {
968 u32 buf;
969 int ret;
970
971 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
972
973 if (ret < 0) {
974 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
975 return ret;
976 }
977
978 if (buf & PMT_CTL_DEV_RDY)
979 return 0;
980
981 msleep(10);
982 timeout++;
983 } while (timeout < 100);
984
985 netdev_warn(dev->net, "timeout waiting for device ready\n");
986 return -EIO;
987 }
988
smsc75xx_phy_gig_workaround(struct usbnet * dev)989 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
990 {
991 struct mii_if_info *mii = &dev->mii;
992 int ret = 0, timeout = 0;
993 u32 buf, link_up = 0;
994
995 /* Set the phy in Gig loopback */
996 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
997
998 /* Wait for the link up */
999 do {
1000 link_up = smsc75xx_link_ok_nopm(dev);
1001 usleep_range(10000, 20000);
1002 timeout++;
1003 } while ((!link_up) && (timeout < 1000));
1004
1005 if (timeout >= 1000) {
1006 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1007 return -EIO;
1008 }
1009
1010 /* phy reset */
1011 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1012 if (ret < 0) {
1013 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1014 return ret;
1015 }
1016
1017 buf |= PMT_CTL_PHY_RST;
1018
1019 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1020 if (ret < 0) {
1021 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1022 return ret;
1023 }
1024
1025 timeout = 0;
1026 do {
1027 usleep_range(10000, 20000);
1028 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1029 if (ret < 0) {
1030 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1031 ret);
1032 return ret;
1033 }
1034 timeout++;
1035 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1036
1037 if (timeout >= 100) {
1038 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1039 return -EIO;
1040 }
1041
1042 return 0;
1043 }
1044
smsc75xx_reset(struct usbnet * dev)1045 static int smsc75xx_reset(struct usbnet *dev)
1046 {
1047 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1048 u32 buf;
1049 int ret = 0, timeout;
1050
1051 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1052
1053 ret = smsc75xx_wait_ready(dev, 0);
1054 if (ret < 0) {
1055 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1056 return ret;
1057 }
1058
1059 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1060 if (ret < 0) {
1061 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1062 return ret;
1063 }
1064
1065 buf |= HW_CFG_LRST;
1066
1067 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1068 if (ret < 0) {
1069 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1070 return ret;
1071 }
1072
1073 timeout = 0;
1074 do {
1075 msleep(10);
1076 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1077 if (ret < 0) {
1078 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1079 return ret;
1080 }
1081 timeout++;
1082 } while ((buf & HW_CFG_LRST) && (timeout < 100));
1083
1084 if (timeout >= 100) {
1085 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1086 return -EIO;
1087 }
1088
1089 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1090
1091 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1092 if (ret < 0) {
1093 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1094 return ret;
1095 }
1096
1097 buf |= PMT_CTL_PHY_RST;
1098
1099 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1100 if (ret < 0) {
1101 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1102 return ret;
1103 }
1104
1105 timeout = 0;
1106 do {
1107 msleep(10);
1108 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1109 if (ret < 0) {
1110 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1111 return ret;
1112 }
1113 timeout++;
1114 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1115
1116 if (timeout >= 100) {
1117 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1118 return -EIO;
1119 }
1120
1121 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1122
1123 ret = smsc75xx_set_mac_address(dev);
1124 if (ret < 0) {
1125 netdev_warn(dev->net, "Failed to set mac address\n");
1126 return ret;
1127 }
1128
1129 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1130 dev->net->dev_addr);
1131
1132 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1133 if (ret < 0) {
1134 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1135 return ret;
1136 }
1137
1138 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1139 buf);
1140
1141 buf |= HW_CFG_BIR;
1142
1143 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1144 if (ret < 0) {
1145 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1146 return ret;
1147 }
1148
1149 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1150 if (ret < 0) {
1151 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1152 return ret;
1153 }
1154
1155 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1156 buf);
1157
1158 if (!turbo_mode) {
1159 buf = 0;
1160 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1161 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1162 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1163 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1164 } else {
1165 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1166 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1167 }
1168
1169 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1170 (ulong)dev->rx_urb_size);
1171
1172 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1173 if (ret < 0) {
1174 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1175 return ret;
1176 }
1177
1178 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1179 if (ret < 0) {
1180 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1181 return ret;
1182 }
1183
1184 netif_dbg(dev, ifup, dev->net,
1185 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1186
1187 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1188 if (ret < 0) {
1189 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1190 return ret;
1191 }
1192
1193 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1194 if (ret < 0) {
1195 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1196 return ret;
1197 }
1198
1199 netif_dbg(dev, ifup, dev->net,
1200 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1201
1202 if (turbo_mode) {
1203 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1204 if (ret < 0) {
1205 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1206 return ret;
1207 }
1208
1209 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1210
1211 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1212
1213 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1214 if (ret < 0) {
1215 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1216 return ret;
1217 }
1218
1219 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1220 if (ret < 0) {
1221 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1222 return ret;
1223 }
1224
1225 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1226 }
1227
1228 /* set FIFO sizes */
1229 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1230 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1231 if (ret < 0) {
1232 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1233 return ret;
1234 }
1235
1236 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1237
1238 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1239 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1240 if (ret < 0) {
1241 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1242 return ret;
1243 }
1244
1245 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1246
1247 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1248 if (ret < 0) {
1249 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1250 return ret;
1251 }
1252
1253 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1254 if (ret < 0) {
1255 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1256 return ret;
1257 }
1258
1259 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1260
1261 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1262 if (ret < 0) {
1263 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1264 return ret;
1265 }
1266
1267 /* only set default GPIO/LED settings if no EEPROM is detected */
1268 if (!(buf & E2P_CMD_LOADED)) {
1269 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1270 if (ret < 0) {
1271 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1272 return ret;
1273 }
1274
1275 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1276 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1277
1278 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1279 if (ret < 0) {
1280 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1281 return ret;
1282 }
1283 }
1284
1285 ret = smsc75xx_write_reg(dev, FLOW, 0);
1286 if (ret < 0) {
1287 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1288 return ret;
1289 }
1290
1291 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1292 if (ret < 0) {
1293 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1294 return ret;
1295 }
1296
1297 /* Don't need rfe_ctl_lock during initialisation */
1298 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1299 if (ret < 0) {
1300 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1301 return ret;
1302 }
1303
1304 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1305
1306 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1307 if (ret < 0) {
1308 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1309 return ret;
1310 }
1311
1312 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1313 if (ret < 0) {
1314 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1315 return ret;
1316 }
1317
1318 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1319 pdata->rfe_ctl);
1320
1321 /* Enable or disable checksum offload engines */
1322 smsc75xx_set_features(dev->net, dev->net->features);
1323
1324 smsc75xx_set_multicast(dev->net);
1325
1326 ret = smsc75xx_phy_initialize(dev);
1327 if (ret < 0) {
1328 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1329 return ret;
1330 }
1331
1332 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1333 if (ret < 0) {
1334 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1335 return ret;
1336 }
1337
1338 /* enable PHY interrupts */
1339 buf |= INT_ENP_PHY_INT;
1340
1341 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1342 if (ret < 0) {
1343 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1344 return ret;
1345 }
1346
1347 /* allow mac to detect speed and duplex from phy */
1348 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1349 if (ret < 0) {
1350 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1351 return ret;
1352 }
1353
1354 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1355 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1356 if (ret < 0) {
1357 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1358 return ret;
1359 }
1360
1361 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1362 if (ret < 0) {
1363 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1364 return ret;
1365 }
1366
1367 buf |= MAC_TX_TXEN;
1368
1369 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1370 if (ret < 0) {
1371 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1372 return ret;
1373 }
1374
1375 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1376
1377 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1378 if (ret < 0) {
1379 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1380 return ret;
1381 }
1382
1383 buf |= FCT_TX_CTL_EN;
1384
1385 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1386 if (ret < 0) {
1387 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1388 return ret;
1389 }
1390
1391 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1392
1393 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1394 if (ret < 0) {
1395 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1396 return ret;
1397 }
1398
1399 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1400 if (ret < 0) {
1401 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1402 return ret;
1403 }
1404
1405 buf |= MAC_RX_RXEN;
1406
1407 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1408 if (ret < 0) {
1409 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1410 return ret;
1411 }
1412
1413 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1414
1415 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1416 if (ret < 0) {
1417 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1418 return ret;
1419 }
1420
1421 buf |= FCT_RX_CTL_EN;
1422
1423 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1424 if (ret < 0) {
1425 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1426 return ret;
1427 }
1428
1429 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1430
1431 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1432 return 0;
1433 }
1434
1435 static const struct net_device_ops smsc75xx_netdev_ops = {
1436 .ndo_open = usbnet_open,
1437 .ndo_stop = usbnet_stop,
1438 .ndo_start_xmit = usbnet_start_xmit,
1439 .ndo_tx_timeout = usbnet_tx_timeout,
1440 .ndo_get_stats64 = dev_get_tstats64,
1441 .ndo_change_mtu = smsc75xx_change_mtu,
1442 .ndo_set_mac_address = eth_mac_addr,
1443 .ndo_validate_addr = eth_validate_addr,
1444 .ndo_eth_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 dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1506 return 0;
1507
1508 cancel_work:
1509 cancel_work_sync(&pdata->set_multicast);
1510 free_pdata:
1511 kfree(pdata);
1512 dev->data[0] = 0;
1513 return ret;
1514 }
1515
smsc75xx_unbind(struct usbnet * dev,struct usb_interface * intf)1516 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1517 {
1518 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1519 if (pdata) {
1520 cancel_work_sync(&pdata->set_multicast);
1521 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1522 kfree(pdata);
1523 dev->data[0] = 0;
1524 }
1525 }
1526
smsc_crc(const u8 * buffer,size_t len)1527 static u16 smsc_crc(const u8 *buffer, size_t len)
1528 {
1529 return bitrev16(crc16(0xFFFF, buffer, len));
1530 }
1531
smsc75xx_write_wuff(struct usbnet * dev,int filter,u32 wuf_cfg,u32 wuf_mask1)1532 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1533 u32 wuf_mask1)
1534 {
1535 int cfg_base = WUF_CFGX + filter * 4;
1536 int mask_base = WUF_MASKX + filter * 16;
1537 int ret;
1538
1539 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1540 if (ret < 0) {
1541 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1542 return ret;
1543 }
1544
1545 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1546 if (ret < 0) {
1547 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1548 return ret;
1549 }
1550
1551 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1552 if (ret < 0) {
1553 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1554 return ret;
1555 }
1556
1557 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1558 if (ret < 0) {
1559 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1560 return ret;
1561 }
1562
1563 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1564 if (ret < 0) {
1565 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1566 return ret;
1567 }
1568
1569 return 0;
1570 }
1571
smsc75xx_enter_suspend0(struct usbnet * dev)1572 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1573 {
1574 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1575 u32 val;
1576 int ret;
1577
1578 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1579 if (ret < 0) {
1580 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1581 return ret;
1582 }
1583
1584 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1585 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1586
1587 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1588 if (ret < 0) {
1589 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1590 return ret;
1591 }
1592
1593 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1594
1595 return 0;
1596 }
1597
smsc75xx_enter_suspend1(struct usbnet * dev)1598 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1599 {
1600 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1601 u32 val;
1602 int ret;
1603
1604 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1605 if (ret < 0) {
1606 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1607 return ret;
1608 }
1609
1610 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1611 val |= PMT_CTL_SUS_MODE_1;
1612
1613 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1614 if (ret < 0) {
1615 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1616 return ret;
1617 }
1618
1619 /* clear wol status, enable energy detection */
1620 val &= ~PMT_CTL_WUPS;
1621 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1622
1623 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1624 if (ret < 0) {
1625 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1626 return ret;
1627 }
1628
1629 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1630
1631 return 0;
1632 }
1633
smsc75xx_enter_suspend2(struct usbnet * dev)1634 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1635 {
1636 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1637 u32 val;
1638 int ret;
1639
1640 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1641 if (ret < 0) {
1642 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1643 return ret;
1644 }
1645
1646 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1647 val |= PMT_CTL_SUS_MODE_2;
1648
1649 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1650 if (ret < 0) {
1651 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1652 return ret;
1653 }
1654
1655 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1656
1657 return 0;
1658 }
1659
smsc75xx_enter_suspend3(struct usbnet * dev)1660 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1661 {
1662 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1663 u32 val;
1664 int ret;
1665
1666 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1667 if (ret < 0) {
1668 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1669 return ret;
1670 }
1671
1672 if (val & FCT_RX_CTL_RXUSED) {
1673 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1674 return -EBUSY;
1675 }
1676
1677 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1678 if (ret < 0) {
1679 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1680 return ret;
1681 }
1682
1683 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1684 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1685
1686 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1687 if (ret < 0) {
1688 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1689 return ret;
1690 }
1691
1692 /* clear wol status */
1693 val &= ~PMT_CTL_WUPS;
1694 val |= PMT_CTL_WUPS_WOL;
1695
1696 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1697 if (ret < 0) {
1698 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1699 return ret;
1700 }
1701
1702 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1703
1704 return 0;
1705 }
1706
smsc75xx_enable_phy_wakeup_interrupts(struct usbnet * dev,u16 mask)1707 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1708 {
1709 struct mii_if_info *mii = &dev->mii;
1710 int ret;
1711
1712 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1713
1714 /* read to clear */
1715 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1716 if (ret < 0) {
1717 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1718 return ret;
1719 }
1720
1721 /* enable interrupt source */
1722 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1723 if (ret < 0) {
1724 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1725 return ret;
1726 }
1727
1728 ret |= mask;
1729
1730 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1731
1732 return 0;
1733 }
1734
smsc75xx_link_ok_nopm(struct usbnet * dev)1735 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1736 {
1737 struct mii_if_info *mii = &dev->mii;
1738 int ret;
1739
1740 /* first, a dummy read, needed to latch some MII phys */
1741 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1742 if (ret < 0) {
1743 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1744 return ret;
1745 }
1746
1747 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1748 if (ret < 0) {
1749 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1750 return ret;
1751 }
1752
1753 return !!(ret & BMSR_LSTATUS);
1754 }
1755
smsc75xx_autosuspend(struct usbnet * dev,u32 link_up)1756 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1757 {
1758 int ret;
1759
1760 if (!netif_running(dev->net)) {
1761 /* interface is ifconfig down so fully power down hw */
1762 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1763 return smsc75xx_enter_suspend2(dev);
1764 }
1765
1766 if (!link_up) {
1767 /* link is down so enter EDPD mode */
1768 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1769
1770 /* enable PHY wakeup events for if cable is attached */
1771 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1772 PHY_INT_MASK_ANEG_COMP);
1773 if (ret < 0) {
1774 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1775 return ret;
1776 }
1777
1778 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1779 return smsc75xx_enter_suspend1(dev);
1780 }
1781
1782 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1783 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1784 PHY_INT_MASK_LINK_DOWN);
1785 if (ret < 0) {
1786 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1787 return ret;
1788 }
1789
1790 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1791 return smsc75xx_enter_suspend3(dev);
1792 }
1793
smsc75xx_suspend(struct usb_interface * intf,pm_message_t message)1794 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1795 {
1796 struct usbnet *dev = usb_get_intfdata(intf);
1797 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1798 u32 val, link_up;
1799 int ret;
1800
1801 ret = usbnet_suspend(intf, message);
1802 if (ret < 0) {
1803 netdev_warn(dev->net, "usbnet_suspend error\n");
1804 return ret;
1805 }
1806
1807 if (pdata->suspend_flags) {
1808 netdev_warn(dev->net, "error during last resume\n");
1809 pdata->suspend_flags = 0;
1810 }
1811
1812 /* determine if link is up using only _nopm functions */
1813 link_up = smsc75xx_link_ok_nopm(dev);
1814
1815 if (message.event == PM_EVENT_AUTO_SUSPEND) {
1816 ret = smsc75xx_autosuspend(dev, link_up);
1817 goto done;
1818 }
1819
1820 /* if we get this far we're not autosuspending */
1821 /* if no wol options set, or if link is down and we're not waking on
1822 * PHY activity, enter lowest power SUSPEND2 mode
1823 */
1824 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1825 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1826 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1827
1828 /* disable energy detect (link up) & wake up events */
1829 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1830 if (ret < 0) {
1831 netdev_warn(dev->net, "Error reading WUCSR\n");
1832 goto done;
1833 }
1834
1835 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1836
1837 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1838 if (ret < 0) {
1839 netdev_warn(dev->net, "Error writing WUCSR\n");
1840 goto done;
1841 }
1842
1843 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1844 if (ret < 0) {
1845 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1846 goto done;
1847 }
1848
1849 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1850
1851 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1852 if (ret < 0) {
1853 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1854 goto done;
1855 }
1856
1857 ret = smsc75xx_enter_suspend2(dev);
1858 goto done;
1859 }
1860
1861 if (pdata->wolopts & WAKE_PHY) {
1862 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1863 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1864 if (ret < 0) {
1865 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1866 goto done;
1867 }
1868
1869 /* if link is down then configure EDPD and enter SUSPEND1,
1870 * otherwise enter SUSPEND0 below
1871 */
1872 if (!link_up) {
1873 struct mii_if_info *mii = &dev->mii;
1874 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1875
1876 /* enable energy detect power-down mode */
1877 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1878 PHY_MODE_CTRL_STS);
1879 if (ret < 0) {
1880 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1881 goto done;
1882 }
1883
1884 ret |= MODE_CTRL_STS_EDPWRDOWN;
1885
1886 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1887 PHY_MODE_CTRL_STS, ret);
1888
1889 /* enter SUSPEND1 mode */
1890 ret = smsc75xx_enter_suspend1(dev);
1891 goto done;
1892 }
1893 }
1894
1895 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1896 int i, filter = 0;
1897
1898 /* disable all filters */
1899 for (i = 0; i < WUF_NUM; i++) {
1900 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1901 if (ret < 0) {
1902 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1903 goto done;
1904 }
1905 }
1906
1907 if (pdata->wolopts & WAKE_MCAST) {
1908 const u8 mcast[] = {0x01, 0x00, 0x5E};
1909 netdev_info(dev->net, "enabling multicast detection\n");
1910
1911 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1912 | smsc_crc(mcast, 3);
1913 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1914 if (ret < 0) {
1915 netdev_warn(dev->net, "Error writing wakeup filter\n");
1916 goto done;
1917 }
1918 }
1919
1920 if (pdata->wolopts & WAKE_ARP) {
1921 const u8 arp[] = {0x08, 0x06};
1922 netdev_info(dev->net, "enabling ARP detection\n");
1923
1924 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1925 | smsc_crc(arp, 2);
1926 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1927 if (ret < 0) {
1928 netdev_warn(dev->net, "Error writing wakeup filter\n");
1929 goto done;
1930 }
1931 }
1932
1933 /* clear any pending pattern match packet status */
1934 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1935 if (ret < 0) {
1936 netdev_warn(dev->net, "Error reading WUCSR\n");
1937 goto done;
1938 }
1939
1940 val |= WUCSR_WUFR;
1941
1942 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1943 if (ret < 0) {
1944 netdev_warn(dev->net, "Error writing WUCSR\n");
1945 goto done;
1946 }
1947
1948 netdev_info(dev->net, "enabling packet match detection\n");
1949 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1950 if (ret < 0) {
1951 netdev_warn(dev->net, "Error reading WUCSR\n");
1952 goto done;
1953 }
1954
1955 val |= WUCSR_WUEN;
1956
1957 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1958 if (ret < 0) {
1959 netdev_warn(dev->net, "Error writing WUCSR\n");
1960 goto done;
1961 }
1962 } else {
1963 netdev_info(dev->net, "disabling packet match detection\n");
1964 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1965 if (ret < 0) {
1966 netdev_warn(dev->net, "Error reading WUCSR\n");
1967 goto done;
1968 }
1969
1970 val &= ~WUCSR_WUEN;
1971
1972 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1973 if (ret < 0) {
1974 netdev_warn(dev->net, "Error writing WUCSR\n");
1975 goto done;
1976 }
1977 }
1978
1979 /* disable magic, bcast & unicast wakeup sources */
1980 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1981 if (ret < 0) {
1982 netdev_warn(dev->net, "Error reading WUCSR\n");
1983 goto done;
1984 }
1985
1986 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1987
1988 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1989 if (ret < 0) {
1990 netdev_warn(dev->net, "Error writing WUCSR\n");
1991 goto done;
1992 }
1993
1994 if (pdata->wolopts & WAKE_PHY) {
1995 netdev_info(dev->net, "enabling PHY wakeup\n");
1996
1997 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1998 if (ret < 0) {
1999 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2000 goto done;
2001 }
2002
2003 /* clear wol status, enable energy detection */
2004 val &= ~PMT_CTL_WUPS;
2005 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2006
2007 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2008 if (ret < 0) {
2009 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2010 goto done;
2011 }
2012 }
2013
2014 if (pdata->wolopts & WAKE_MAGIC) {
2015 netdev_info(dev->net, "enabling magic packet wakeup\n");
2016 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2017 if (ret < 0) {
2018 netdev_warn(dev->net, "Error reading WUCSR\n");
2019 goto done;
2020 }
2021
2022 /* clear any pending magic packet status */
2023 val |= WUCSR_MPR | WUCSR_MPEN;
2024
2025 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2026 if (ret < 0) {
2027 netdev_warn(dev->net, "Error writing WUCSR\n");
2028 goto done;
2029 }
2030 }
2031
2032 if (pdata->wolopts & WAKE_BCAST) {
2033 netdev_info(dev->net, "enabling broadcast detection\n");
2034 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2035 if (ret < 0) {
2036 netdev_warn(dev->net, "Error reading WUCSR\n");
2037 goto done;
2038 }
2039
2040 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2041
2042 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2043 if (ret < 0) {
2044 netdev_warn(dev->net, "Error writing WUCSR\n");
2045 goto done;
2046 }
2047 }
2048
2049 if (pdata->wolopts & WAKE_UCAST) {
2050 netdev_info(dev->net, "enabling unicast detection\n");
2051 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2052 if (ret < 0) {
2053 netdev_warn(dev->net, "Error reading WUCSR\n");
2054 goto done;
2055 }
2056
2057 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2058
2059 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2060 if (ret < 0) {
2061 netdev_warn(dev->net, "Error writing WUCSR\n");
2062 goto done;
2063 }
2064 }
2065
2066 /* enable receiver to enable frame reception */
2067 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2068 if (ret < 0) {
2069 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2070 goto done;
2071 }
2072
2073 val |= MAC_RX_RXEN;
2074
2075 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2076 if (ret < 0) {
2077 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2078 goto done;
2079 }
2080
2081 /* some wol options are enabled, so enter SUSPEND0 */
2082 netdev_info(dev->net, "entering SUSPEND0 mode\n");
2083 ret = smsc75xx_enter_suspend0(dev);
2084
2085 done:
2086 /*
2087 * TODO: resume() might need to handle the suspend failure
2088 * in system sleep
2089 */
2090 if (ret && PMSG_IS_AUTO(message))
2091 usbnet_resume(intf);
2092 return ret;
2093 }
2094
smsc75xx_resume(struct usb_interface * intf)2095 static int smsc75xx_resume(struct usb_interface *intf)
2096 {
2097 struct usbnet *dev = usb_get_intfdata(intf);
2098 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2099 u8 suspend_flags = pdata->suspend_flags;
2100 int ret;
2101 u32 val;
2102
2103 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2104
2105 /* do this first to ensure it's cleared even in error case */
2106 pdata->suspend_flags = 0;
2107
2108 if (suspend_flags & SUSPEND_ALLMODES) {
2109 /* Disable wakeup sources */
2110 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2111 if (ret < 0) {
2112 netdev_warn(dev->net, "Error reading WUCSR\n");
2113 return ret;
2114 }
2115
2116 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2117 | WUCSR_BCST_EN);
2118
2119 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2120 if (ret < 0) {
2121 netdev_warn(dev->net, "Error writing WUCSR\n");
2122 return ret;
2123 }
2124
2125 /* clear wake-up status */
2126 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2127 if (ret < 0) {
2128 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2129 return ret;
2130 }
2131
2132 val &= ~PMT_CTL_WOL_EN;
2133 val |= PMT_CTL_WUPS;
2134
2135 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2136 if (ret < 0) {
2137 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2138 return ret;
2139 }
2140 }
2141
2142 if (suspend_flags & SUSPEND_SUSPEND2) {
2143 netdev_info(dev->net, "resuming from SUSPEND2\n");
2144
2145 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2146 if (ret < 0) {
2147 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2148 return ret;
2149 }
2150
2151 val |= PMT_CTL_PHY_PWRUP;
2152
2153 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2154 if (ret < 0) {
2155 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2156 return ret;
2157 }
2158 }
2159
2160 ret = smsc75xx_wait_ready(dev, 1);
2161 if (ret < 0) {
2162 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2163 return ret;
2164 }
2165
2166 return usbnet_resume(intf);
2167 }
2168
smsc75xx_rx_csum_offload(struct usbnet * dev,struct sk_buff * skb,u32 rx_cmd_a,u32 rx_cmd_b)2169 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2170 u32 rx_cmd_a, u32 rx_cmd_b)
2171 {
2172 if (!(dev->net->features & NETIF_F_RXCSUM) ||
2173 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2174 skb->ip_summed = CHECKSUM_NONE;
2175 } else {
2176 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2177 skb->ip_summed = CHECKSUM_COMPLETE;
2178 }
2179 }
2180
smsc75xx_rx_fixup(struct usbnet * dev,struct sk_buff * skb)2181 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2182 {
2183 /* This check is no longer done by usbnet */
2184 if (skb->len < dev->net->hard_header_len)
2185 return 0;
2186
2187 while (skb->len > 0) {
2188 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2189 struct sk_buff *ax_skb;
2190 unsigned char *packet;
2191
2192 rx_cmd_a = get_unaligned_le32(skb->data);
2193 skb_pull(skb, 4);
2194
2195 rx_cmd_b = get_unaligned_le32(skb->data);
2196 skb_pull(skb, 4 + RXW_PADDING);
2197
2198 packet = skb->data;
2199
2200 /* get the packet length */
2201 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2202 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2203
2204 if (unlikely(size > skb->len)) {
2205 netif_dbg(dev, rx_err, dev->net,
2206 "size err rx_cmd_a=0x%08x\n",
2207 rx_cmd_a);
2208 return 0;
2209 }
2210
2211 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2212 netif_dbg(dev, rx_err, dev->net,
2213 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2214 dev->net->stats.rx_errors++;
2215 dev->net->stats.rx_dropped++;
2216
2217 if (rx_cmd_a & RX_CMD_A_FCS)
2218 dev->net->stats.rx_crc_errors++;
2219 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2220 dev->net->stats.rx_frame_errors++;
2221 } else {
2222 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2223 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2224 netif_dbg(dev, rx_err, dev->net,
2225 "size err rx_cmd_a=0x%08x\n",
2226 rx_cmd_a);
2227 return 0;
2228 }
2229
2230 /* last frame in this batch */
2231 if (skb->len == size) {
2232 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2233 rx_cmd_b);
2234
2235 skb_trim(skb, skb->len - 4); /* remove fcs */
2236 skb->truesize = size + sizeof(struct sk_buff);
2237
2238 return 1;
2239 }
2240
2241 ax_skb = skb_clone(skb, GFP_ATOMIC);
2242 if (unlikely(!ax_skb)) {
2243 netdev_warn(dev->net, "Error allocating skb\n");
2244 return 0;
2245 }
2246
2247 ax_skb->len = size;
2248 ax_skb->data = packet;
2249 skb_set_tail_pointer(ax_skb, size);
2250
2251 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2252 rx_cmd_b);
2253
2254 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2255 ax_skb->truesize = size + sizeof(struct sk_buff);
2256
2257 usbnet_skb_return(dev, ax_skb);
2258 }
2259
2260 skb_pull(skb, size);
2261
2262 /* padding bytes before the next frame starts */
2263 if (skb->len)
2264 skb_pull(skb, align_count);
2265 }
2266
2267 return 1;
2268 }
2269
smsc75xx_tx_fixup(struct usbnet * dev,struct sk_buff * skb,gfp_t flags)2270 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2271 struct sk_buff *skb, gfp_t flags)
2272 {
2273 u32 tx_cmd_a, tx_cmd_b;
2274 void *ptr;
2275
2276 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2277 dev_kfree_skb_any(skb);
2278 return NULL;
2279 }
2280
2281 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2282
2283 if (skb->ip_summed == CHECKSUM_PARTIAL)
2284 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2285
2286 if (skb_is_gso(skb)) {
2287 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2288 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2289
2290 tx_cmd_a |= TX_CMD_A_LSO;
2291 } else {
2292 tx_cmd_b = 0;
2293 }
2294
2295 ptr = skb_push(skb, 8);
2296 put_unaligned_le32(tx_cmd_a, ptr);
2297 put_unaligned_le32(tx_cmd_b, ptr + 4);
2298
2299 return skb;
2300 }
2301
smsc75xx_manage_power(struct usbnet * dev,int on)2302 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2303 {
2304 dev->intf->needs_remote_wakeup = on;
2305 return 0;
2306 }
2307
2308 static const struct driver_info smsc75xx_info = {
2309 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
2310 .bind = smsc75xx_bind,
2311 .unbind = smsc75xx_unbind,
2312 .link_reset = smsc75xx_link_reset,
2313 .reset = smsc75xx_reset,
2314 .rx_fixup = smsc75xx_rx_fixup,
2315 .tx_fixup = smsc75xx_tx_fixup,
2316 .status = smsc75xx_status,
2317 .manage_power = smsc75xx_manage_power,
2318 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2319 };
2320
2321 static const struct usb_device_id products[] = {
2322 {
2323 /* SMSC7500 USB Gigabit Ethernet Device */
2324 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2325 .driver_info = (unsigned long) &smsc75xx_info,
2326 },
2327 {
2328 /* SMSC7500 USB Gigabit Ethernet Device */
2329 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2330 .driver_info = (unsigned long) &smsc75xx_info,
2331 },
2332 { }, /* END */
2333 };
2334 MODULE_DEVICE_TABLE(usb, products);
2335
2336 static struct usb_driver smsc75xx_driver = {
2337 .name = SMSC_CHIPNAME,
2338 .id_table = products,
2339 .probe = usbnet_probe,
2340 .suspend = smsc75xx_suspend,
2341 .resume = smsc75xx_resume,
2342 .reset_resume = smsc75xx_resume,
2343 .disconnect = usbnet_disconnect,
2344 .disable_hub_initiated_lpm = 1,
2345 .supports_autosuspend = 1,
2346 };
2347
2348 module_usb_driver(smsc75xx_driver);
2349
2350 MODULE_AUTHOR("Nancy Lin");
2351 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2352 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2353 MODULE_LICENSE("GPL");
2354