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 HS_USB_PKT_SIZE (512)
25 #define FS_USB_PKT_SIZE (64)
26 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
27 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
28 #define DEFAULT_BULK_IN_DELAY (0x00002000)
29 #define MAX_SINGLE_PACKET_SIZE (9000)
30 #define LAN75XX_EEPROM_MAGIC (0x7500)
31 #define EEPROM_MAC_OFFSET (0x01)
32 #define DEFAULT_TX_CSUM_ENABLE (true)
33 #define DEFAULT_RX_CSUM_ENABLE (true)
34 #define SMSC75XX_INTERNAL_PHY_ID (1)
35 #define SMSC75XX_TX_OVERHEAD (8)
36 #define MAX_RX_FIFO_SIZE (20 * 1024)
37 #define MAX_TX_FIFO_SIZE (12 * 1024)
38 #define USB_VENDOR_ID_SMSC (0x0424)
39 #define USB_PRODUCT_ID_LAN7500 (0x7500)
40 #define USB_PRODUCT_ID_LAN7505 (0x7505)
41 #define RXW_PADDING 2
42 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
43 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
44
45 #define SUSPEND_SUSPEND0 (0x01)
46 #define SUSPEND_SUSPEND1 (0x02)
47 #define SUSPEND_SUSPEND2 (0x04)
48 #define SUSPEND_SUSPEND3 (0x08)
49 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
50 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
51
52 struct smsc75xx_priv {
53 struct usbnet *dev;
54 u32 rfe_ctl;
55 u32 wolopts;
56 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
57 struct mutex dataport_mutex;
58 spinlock_t rfe_ctl_lock;
59 struct work_struct set_multicast;
60 u8 suspend_flags;
61 };
62
63 static bool turbo_mode = true;
64 module_param(turbo_mode, bool, 0644);
65 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
66
67 static int smsc75xx_link_ok_nopm(struct usbnet *dev);
68 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
69
__smsc75xx_read_reg(struct usbnet * dev,u32 index,u32 * data,int in_pm)70 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
71 u32 *data, int in_pm)
72 {
73 u32 buf;
74 int ret;
75 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
76
77 BUG_ON(!dev);
78
79 if (!in_pm)
80 fn = usbnet_read_cmd;
81 else
82 fn = usbnet_read_cmd_nopm;
83
84 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
85 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
86 0, index, &buf, 4);
87 if (unlikely(ret < 4)) {
88 ret = ret < 0 ? ret : -ENODATA;
89
90 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
91 index, ret);
92 return ret;
93 }
94
95 le32_to_cpus(&buf);
96 *data = buf;
97
98 return ret;
99 }
100
__smsc75xx_write_reg(struct usbnet * dev,u32 index,u32 data,int in_pm)101 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
102 u32 data, int in_pm)
103 {
104 u32 buf;
105 int ret;
106 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
107
108 BUG_ON(!dev);
109
110 if (!in_pm)
111 fn = usbnet_write_cmd;
112 else
113 fn = usbnet_write_cmd_nopm;
114
115 buf = data;
116 cpu_to_le32s(&buf);
117
118 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
119 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
120 0, index, &buf, 4);
121 if (unlikely(ret < 0))
122 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
123 index, ret);
124
125 return ret;
126 }
127
smsc75xx_read_reg_nopm(struct usbnet * dev,u32 index,u32 * data)128 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
129 u32 *data)
130 {
131 return __smsc75xx_read_reg(dev, index, data, 1);
132 }
133
smsc75xx_write_reg_nopm(struct usbnet * dev,u32 index,u32 data)134 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
135 u32 data)
136 {
137 return __smsc75xx_write_reg(dev, index, data, 1);
138 }
139
smsc75xx_read_reg(struct usbnet * dev,u32 index,u32 * data)140 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
141 u32 *data)
142 {
143 return __smsc75xx_read_reg(dev, index, data, 0);
144 }
145
smsc75xx_write_reg(struct usbnet * dev,u32 index,u32 data)146 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
147 u32 data)
148 {
149 return __smsc75xx_write_reg(dev, index, data, 0);
150 }
151
152 /* Loop until the read is completed with timeout
153 * called with phy_mutex held */
__smsc75xx_phy_wait_not_busy(struct usbnet * dev,int in_pm)154 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
155 int in_pm)
156 {
157 unsigned long start_time = jiffies;
158 u32 val;
159 int ret;
160
161 do {
162 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
163 if (ret < 0) {
164 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
165 return ret;
166 }
167
168 if (!(val & MII_ACCESS_BUSY))
169 return 0;
170 } while (!time_after(jiffies, start_time + HZ));
171
172 return -EIO;
173 }
174
__smsc75xx_mdio_read(struct net_device * netdev,int phy_id,int idx,int in_pm)175 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
176 int in_pm)
177 {
178 struct usbnet *dev = netdev_priv(netdev);
179 u32 val, addr;
180 int ret;
181
182 mutex_lock(&dev->phy_mutex);
183
184 /* confirm MII not busy */
185 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
186 if (ret < 0) {
187 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
188 goto done;
189 }
190
191 /* set the address, index & direction (read from PHY) */
192 phy_id &= dev->mii.phy_id_mask;
193 idx &= dev->mii.reg_num_mask;
194 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
195 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
196 | MII_ACCESS_READ | MII_ACCESS_BUSY;
197 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
198 if (ret < 0) {
199 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
200 goto done;
201 }
202
203 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
204 if (ret < 0) {
205 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
206 goto done;
207 }
208
209 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
210 if (ret < 0) {
211 netdev_warn(dev->net, "Error reading MII_DATA\n");
212 goto done;
213 }
214
215 ret = (u16)(val & 0xFFFF);
216
217 done:
218 mutex_unlock(&dev->phy_mutex);
219 return ret;
220 }
221
__smsc75xx_mdio_write(struct net_device * netdev,int phy_id,int idx,int regval,int in_pm)222 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
223 int idx, int regval, int in_pm)
224 {
225 struct usbnet *dev = netdev_priv(netdev);
226 u32 val, addr;
227 int ret;
228
229 mutex_lock(&dev->phy_mutex);
230
231 /* confirm MII not busy */
232 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
233 if (ret < 0) {
234 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
235 goto done;
236 }
237
238 val = regval;
239 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
240 if (ret < 0) {
241 netdev_warn(dev->net, "Error writing MII_DATA\n");
242 goto done;
243 }
244
245 /* set the address, index & direction (write to PHY) */
246 phy_id &= dev->mii.phy_id_mask;
247 idx &= dev->mii.reg_num_mask;
248 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
249 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
250 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
251 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
252 if (ret < 0) {
253 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
254 goto done;
255 }
256
257 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
258 if (ret < 0) {
259 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
260 goto done;
261 }
262
263 done:
264 mutex_unlock(&dev->phy_mutex);
265 }
266
smsc75xx_mdio_read_nopm(struct net_device * netdev,int phy_id,int idx)267 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
268 int idx)
269 {
270 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
271 }
272
smsc75xx_mdio_write_nopm(struct net_device * netdev,int phy_id,int idx,int regval)273 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
274 int idx, int regval)
275 {
276 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
277 }
278
smsc75xx_mdio_read(struct net_device * netdev,int phy_id,int idx)279 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
280 {
281 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
282 }
283
smsc75xx_mdio_write(struct net_device * netdev,int phy_id,int idx,int regval)284 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
285 int regval)
286 {
287 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
288 }
289
smsc75xx_wait_eeprom(struct usbnet * dev)290 static int smsc75xx_wait_eeprom(struct usbnet *dev)
291 {
292 unsigned long start_time = jiffies;
293 u32 val;
294 int ret;
295
296 do {
297 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
298 if (ret < 0) {
299 netdev_warn(dev->net, "Error reading E2P_CMD\n");
300 return ret;
301 }
302
303 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
304 break;
305 udelay(40);
306 } while (!time_after(jiffies, start_time + HZ));
307
308 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
309 netdev_warn(dev->net, "EEPROM read operation timeout\n");
310 return -EIO;
311 }
312
313 return 0;
314 }
315
smsc75xx_eeprom_confirm_not_busy(struct usbnet * dev)316 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
317 {
318 unsigned long start_time = jiffies;
319 u32 val;
320 int ret;
321
322 do {
323 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
324 if (ret < 0) {
325 netdev_warn(dev->net, "Error reading E2P_CMD\n");
326 return ret;
327 }
328
329 if (!(val & E2P_CMD_BUSY))
330 return 0;
331
332 udelay(40);
333 } while (!time_after(jiffies, start_time + HZ));
334
335 netdev_warn(dev->net, "EEPROM is busy\n");
336 return -EIO;
337 }
338
smsc75xx_read_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)339 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
340 u8 *data)
341 {
342 u32 val;
343 int i, ret;
344
345 BUG_ON(!dev);
346 BUG_ON(!data);
347
348 ret = smsc75xx_eeprom_confirm_not_busy(dev);
349 if (ret)
350 return ret;
351
352 for (i = 0; i < length; i++) {
353 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
354 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
355 if (ret < 0) {
356 netdev_warn(dev->net, "Error writing E2P_CMD\n");
357 return ret;
358 }
359
360 ret = smsc75xx_wait_eeprom(dev);
361 if (ret < 0)
362 return ret;
363
364 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
365 if (ret < 0) {
366 netdev_warn(dev->net, "Error reading E2P_DATA\n");
367 return ret;
368 }
369
370 data[i] = val & 0xFF;
371 offset++;
372 }
373
374 return 0;
375 }
376
smsc75xx_write_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)377 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
378 u8 *data)
379 {
380 u32 val;
381 int i, ret;
382
383 BUG_ON(!dev);
384 BUG_ON(!data);
385
386 ret = smsc75xx_eeprom_confirm_not_busy(dev);
387 if (ret)
388 return ret;
389
390 /* Issue write/erase enable command */
391 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
392 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
393 if (ret < 0) {
394 netdev_warn(dev->net, "Error writing E2P_CMD\n");
395 return ret;
396 }
397
398 ret = smsc75xx_wait_eeprom(dev);
399 if (ret < 0)
400 return ret;
401
402 for (i = 0; i < length; i++) {
403
404 /* Fill data register */
405 val = data[i];
406 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
407 if (ret < 0) {
408 netdev_warn(dev->net, "Error writing E2P_DATA\n");
409 return ret;
410 }
411
412 /* Send "write" command */
413 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
414 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
415 if (ret < 0) {
416 netdev_warn(dev->net, "Error writing E2P_CMD\n");
417 return ret;
418 }
419
420 ret = smsc75xx_wait_eeprom(dev);
421 if (ret < 0)
422 return ret;
423
424 offset++;
425 }
426
427 return 0;
428 }
429
smsc75xx_dataport_wait_not_busy(struct usbnet * dev)430 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
431 {
432 int i, ret;
433
434 for (i = 0; i < 100; i++) {
435 u32 dp_sel;
436 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
437 if (ret < 0) {
438 netdev_warn(dev->net, "Error reading DP_SEL\n");
439 return ret;
440 }
441
442 if (dp_sel & DP_SEL_DPRDY)
443 return 0;
444
445 udelay(40);
446 }
447
448 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
449
450 return -EIO;
451 }
452
smsc75xx_dataport_write(struct usbnet * dev,u32 ram_select,u32 addr,u32 length,u32 * buf)453 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
454 u32 length, u32 *buf)
455 {
456 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
457 u32 dp_sel;
458 int i, ret;
459
460 mutex_lock(&pdata->dataport_mutex);
461
462 ret = smsc75xx_dataport_wait_not_busy(dev);
463 if (ret < 0) {
464 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
465 goto done;
466 }
467
468 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
469 if (ret < 0) {
470 netdev_warn(dev->net, "Error reading DP_SEL\n");
471 goto done;
472 }
473
474 dp_sel &= ~DP_SEL_RSEL;
475 dp_sel |= ram_select;
476 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
477 if (ret < 0) {
478 netdev_warn(dev->net, "Error writing DP_SEL\n");
479 goto done;
480 }
481
482 for (i = 0; i < length; i++) {
483 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
484 if (ret < 0) {
485 netdev_warn(dev->net, "Error writing DP_ADDR\n");
486 goto done;
487 }
488
489 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
490 if (ret < 0) {
491 netdev_warn(dev->net, "Error writing DP_DATA\n");
492 goto done;
493 }
494
495 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
496 if (ret < 0) {
497 netdev_warn(dev->net, "Error writing DP_CMD\n");
498 goto done;
499 }
500
501 ret = smsc75xx_dataport_wait_not_busy(dev);
502 if (ret < 0) {
503 netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
504 goto done;
505 }
506 }
507
508 done:
509 mutex_unlock(&pdata->dataport_mutex);
510 return ret;
511 }
512
513 /* returns hash bit number for given MAC address */
smsc75xx_hash(char addr[ETH_ALEN])514 static u32 smsc75xx_hash(char addr[ETH_ALEN])
515 {
516 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
517 }
518
smsc75xx_deferred_multicast_write(struct work_struct * param)519 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
520 {
521 struct smsc75xx_priv *pdata =
522 container_of(param, struct smsc75xx_priv, set_multicast);
523 struct usbnet *dev = pdata->dev;
524 int ret;
525
526 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
527 pdata->rfe_ctl);
528
529 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
530 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
531
532 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
533 if (ret < 0)
534 netdev_warn(dev->net, "Error writing RFE_CRL\n");
535 }
536
smsc75xx_set_multicast(struct net_device * netdev)537 static void smsc75xx_set_multicast(struct net_device *netdev)
538 {
539 struct usbnet *dev = netdev_priv(netdev);
540 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
541 unsigned long flags;
542 int i;
543
544 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
545
546 pdata->rfe_ctl &=
547 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
548 pdata->rfe_ctl |= RFE_CTL_AB;
549
550 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
551 pdata->multicast_hash_table[i] = 0;
552
553 if (dev->net->flags & IFF_PROMISC) {
554 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
555 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
556 } else if (dev->net->flags & IFF_ALLMULTI) {
557 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
558 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
559 } else if (!netdev_mc_empty(dev->net)) {
560 struct netdev_hw_addr *ha;
561
562 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
563
564 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
565
566 netdev_for_each_mc_addr(ha, netdev) {
567 u32 bitnum = smsc75xx_hash(ha->addr);
568 pdata->multicast_hash_table[bitnum / 32] |=
569 (1 << (bitnum % 32));
570 }
571 } else {
572 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
573 pdata->rfe_ctl |= RFE_CTL_DPF;
574 }
575
576 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
577
578 /* defer register writes to a sleepable context */
579 schedule_work(&pdata->set_multicast);
580 }
581
smsc75xx_update_flowcontrol(struct usbnet * dev,u8 duplex,u16 lcladv,u16 rmtadv)582 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
583 u16 lcladv, u16 rmtadv)
584 {
585 u32 flow = 0, fct_flow = 0;
586 int ret;
587
588 if (duplex == DUPLEX_FULL) {
589 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
590
591 if (cap & FLOW_CTRL_TX) {
592 flow = (FLOW_TX_FCEN | 0xFFFF);
593 /* set fct_flow thresholds to 20% and 80% */
594 fct_flow = (8 << 8) | 32;
595 }
596
597 if (cap & FLOW_CTRL_RX)
598 flow |= FLOW_RX_FCEN;
599
600 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
601 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
602 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
603 } else {
604 netif_dbg(dev, link, dev->net, "half duplex\n");
605 }
606
607 ret = smsc75xx_write_reg(dev, FLOW, flow);
608 if (ret < 0) {
609 netdev_warn(dev->net, "Error writing FLOW\n");
610 return ret;
611 }
612
613 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
614 if (ret < 0) {
615 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
616 return ret;
617 }
618
619 return 0;
620 }
621
smsc75xx_link_reset(struct usbnet * dev)622 static int smsc75xx_link_reset(struct usbnet *dev)
623 {
624 struct mii_if_info *mii = &dev->mii;
625 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
626 u16 lcladv, rmtadv;
627 int ret;
628
629 /* write to clear phy interrupt status */
630 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
631 PHY_INT_SRC_CLEAR_ALL);
632
633 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
634 if (ret < 0) {
635 netdev_warn(dev->net, "Error writing INT_STS\n");
636 return ret;
637 }
638
639 mii_check_media(mii, 1, 1);
640 mii_ethtool_gset(&dev->mii, &ecmd);
641 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
642 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
643
644 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
645 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
646
647 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
648 }
649
smsc75xx_status(struct usbnet * dev,struct urb * urb)650 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
651 {
652 u32 intdata;
653
654 if (urb->actual_length != 4) {
655 netdev_warn(dev->net, "unexpected urb length %d\n",
656 urb->actual_length);
657 return;
658 }
659
660 intdata = get_unaligned_le32(urb->transfer_buffer);
661
662 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
663
664 if (intdata & INT_ENP_PHY_INT)
665 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
666 else
667 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
668 intdata);
669 }
670
smsc75xx_ethtool_get_eeprom_len(struct net_device * net)671 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
672 {
673 return MAX_EEPROM_SIZE;
674 }
675
smsc75xx_ethtool_get_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)676 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
677 struct ethtool_eeprom *ee, u8 *data)
678 {
679 struct usbnet *dev = netdev_priv(netdev);
680
681 ee->magic = LAN75XX_EEPROM_MAGIC;
682
683 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
684 }
685
smsc75xx_ethtool_set_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)686 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
687 struct ethtool_eeprom *ee, u8 *data)
688 {
689 struct usbnet *dev = netdev_priv(netdev);
690
691 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
692 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
693 ee->magic);
694 return -EINVAL;
695 }
696
697 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
698 }
699
smsc75xx_ethtool_get_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)700 static void smsc75xx_ethtool_get_wol(struct net_device *net,
701 struct ethtool_wolinfo *wolinfo)
702 {
703 struct usbnet *dev = netdev_priv(net);
704 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
705
706 wolinfo->supported = SUPPORTED_WAKE;
707 wolinfo->wolopts = pdata->wolopts;
708 }
709
smsc75xx_ethtool_set_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)710 static int smsc75xx_ethtool_set_wol(struct net_device *net,
711 struct ethtool_wolinfo *wolinfo)
712 {
713 struct usbnet *dev = netdev_priv(net);
714 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
715 int ret;
716
717 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
718 return -EINVAL;
719
720 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
721
722 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
723 if (ret < 0)
724 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
725
726 return ret;
727 }
728
729 static const struct ethtool_ops smsc75xx_ethtool_ops = {
730 .get_link = usbnet_get_link,
731 .nway_reset = usbnet_nway_reset,
732 .get_drvinfo = usbnet_get_drvinfo,
733 .get_msglevel = usbnet_get_msglevel,
734 .set_msglevel = usbnet_set_msglevel,
735 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
736 .get_eeprom = smsc75xx_ethtool_get_eeprom,
737 .set_eeprom = smsc75xx_ethtool_set_eeprom,
738 .get_wol = smsc75xx_ethtool_get_wol,
739 .set_wol = smsc75xx_ethtool_set_wol,
740 .get_link_ksettings = usbnet_get_link_ksettings_mii,
741 .set_link_ksettings = usbnet_set_link_ksettings_mii,
742 };
743
smsc75xx_ioctl(struct net_device * netdev,struct ifreq * rq,int cmd)744 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
745 {
746 if (!netif_running(netdev))
747 return -EINVAL;
748
749 return usbnet_mii_ioctl(netdev, rq, cmd);
750 }
751
smsc75xx_init_mac_address(struct usbnet * dev)752 static void smsc75xx_init_mac_address(struct usbnet *dev)
753 {
754 u8 addr[ETH_ALEN];
755
756 /* maybe the boot loader passed the MAC address in devicetree */
757 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
758 if (is_valid_ether_addr(dev->net->dev_addr)) {
759 /* device tree values are valid so use them */
760 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
761 return;
762 }
763 }
764
765 /* try reading mac address from EEPROM */
766 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
767 eth_hw_addr_set(dev->net, addr);
768 if (is_valid_ether_addr(dev->net->dev_addr)) {
769 /* eeprom values are valid so use them */
770 netif_dbg(dev, ifup, dev->net,
771 "MAC address read from EEPROM\n");
772 return;
773 }
774 }
775
776 /* no useful static MAC address found. generate a random one */
777 eth_hw_addr_random(dev->net);
778 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
779 }
780
smsc75xx_set_mac_address(struct usbnet * dev)781 static int smsc75xx_set_mac_address(struct usbnet *dev)
782 {
783 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
784 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
785 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
786
787 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
788 if (ret < 0) {
789 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
790 return ret;
791 }
792
793 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
794 if (ret < 0) {
795 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
796 return ret;
797 }
798
799 addr_hi |= ADDR_FILTX_FB_VALID;
800 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
801 if (ret < 0) {
802 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
803 return ret;
804 }
805
806 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
807 if (ret < 0)
808 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
809
810 return ret;
811 }
812
smsc75xx_phy_initialize(struct usbnet * dev)813 static int smsc75xx_phy_initialize(struct usbnet *dev)
814 {
815 int bmcr, ret, timeout = 0;
816
817 /* Initialize MII structure */
818 dev->mii.dev = dev->net;
819 dev->mii.mdio_read = smsc75xx_mdio_read;
820 dev->mii.mdio_write = smsc75xx_mdio_write;
821 dev->mii.phy_id_mask = 0x1f;
822 dev->mii.reg_num_mask = 0x1f;
823 dev->mii.supports_gmii = 1;
824 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
825
826 /* reset phy and wait for reset to complete */
827 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
828
829 do {
830 msleep(10);
831 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
832 if (bmcr < 0) {
833 netdev_warn(dev->net, "Error reading MII_BMCR\n");
834 return bmcr;
835 }
836 timeout++;
837 } while ((bmcr & BMCR_RESET) && (timeout < 100));
838
839 if (timeout >= 100) {
840 netdev_warn(dev->net, "timeout on PHY Reset\n");
841 return -EIO;
842 }
843
844 /* phy workaround for gig link */
845 smsc75xx_phy_gig_workaround(dev);
846
847 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
848 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
849 ADVERTISE_PAUSE_ASYM);
850 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
851 ADVERTISE_1000FULL);
852
853 /* read and write to clear phy interrupt status */
854 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
855 if (ret < 0) {
856 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
857 return ret;
858 }
859
860 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
861
862 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
863 PHY_INT_MASK_DEFAULT);
864 mii_nway_restart(&dev->mii);
865
866 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
867 return 0;
868 }
869
smsc75xx_set_rx_max_frame_length(struct usbnet * dev,int size)870 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
871 {
872 int ret = 0;
873 u32 buf;
874 bool rxenabled;
875
876 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
877 if (ret < 0) {
878 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
879 return ret;
880 }
881
882 rxenabled = ((buf & MAC_RX_RXEN) != 0);
883
884 if (rxenabled) {
885 buf &= ~MAC_RX_RXEN;
886 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
887 if (ret < 0) {
888 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
889 return ret;
890 }
891 }
892
893 /* add 4 to size for FCS */
894 buf &= ~MAC_RX_MAX_SIZE;
895 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
896
897 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
898 if (ret < 0) {
899 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
900 return ret;
901 }
902
903 if (rxenabled) {
904 buf |= MAC_RX_RXEN;
905 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
906 if (ret < 0) {
907 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
908 return ret;
909 }
910 }
911
912 return 0;
913 }
914
smsc75xx_change_mtu(struct net_device * netdev,int new_mtu)915 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
916 {
917 struct usbnet *dev = netdev_priv(netdev);
918 int ret;
919
920 ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
921 if (ret < 0) {
922 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
923 return ret;
924 }
925
926 return usbnet_change_mtu(netdev, new_mtu);
927 }
928
929 /* Enable or disable Rx checksum offload engine */
smsc75xx_set_features(struct net_device * netdev,netdev_features_t features)930 static int smsc75xx_set_features(struct net_device *netdev,
931 netdev_features_t features)
932 {
933 struct usbnet *dev = netdev_priv(netdev);
934 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
935 unsigned long flags;
936 int ret;
937
938 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
939
940 if (features & NETIF_F_RXCSUM)
941 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
942 else
943 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
944
945 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
946 /* it's racing here! */
947
948 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
949 if (ret < 0) {
950 netdev_warn(dev->net, "Error writing RFE_CTL\n");
951 return ret;
952 }
953 return 0;
954 }
955
smsc75xx_wait_ready(struct usbnet * dev,int in_pm)956 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
957 {
958 int timeout = 0;
959
960 do {
961 u32 buf;
962 int ret;
963
964 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
965
966 if (ret < 0) {
967 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
968 return ret;
969 }
970
971 if (buf & PMT_CTL_DEV_RDY)
972 return 0;
973
974 msleep(10);
975 timeout++;
976 } while (timeout < 100);
977
978 netdev_warn(dev->net, "timeout waiting for device ready\n");
979 return -EIO;
980 }
981
smsc75xx_phy_gig_workaround(struct usbnet * dev)982 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
983 {
984 struct mii_if_info *mii = &dev->mii;
985 int ret = 0, timeout = 0;
986 u32 buf, link_up = 0;
987
988 /* Set the phy in Gig loopback */
989 smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
990
991 /* Wait for the link up */
992 do {
993 link_up = smsc75xx_link_ok_nopm(dev);
994 usleep_range(10000, 20000);
995 timeout++;
996 } while ((!link_up) && (timeout < 1000));
997
998 if (timeout >= 1000) {
999 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1000 return -EIO;
1001 }
1002
1003 /* phy reset */
1004 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1005 if (ret < 0) {
1006 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1007 return ret;
1008 }
1009
1010 buf |= PMT_CTL_PHY_RST;
1011
1012 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1013 if (ret < 0) {
1014 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1015 return ret;
1016 }
1017
1018 timeout = 0;
1019 do {
1020 usleep_range(10000, 20000);
1021 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1022 if (ret < 0) {
1023 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1024 ret);
1025 return ret;
1026 }
1027 timeout++;
1028 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1029
1030 if (timeout >= 100) {
1031 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1032 return -EIO;
1033 }
1034
1035 return 0;
1036 }
1037
smsc75xx_reset(struct usbnet * dev)1038 static int smsc75xx_reset(struct usbnet *dev)
1039 {
1040 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1041 u32 buf;
1042 int ret = 0, timeout;
1043
1044 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1045
1046 ret = smsc75xx_wait_ready(dev, 0);
1047 if (ret < 0) {
1048 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1049 return ret;
1050 }
1051
1052 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1053 if (ret < 0) {
1054 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1055 return ret;
1056 }
1057
1058 buf |= HW_CFG_LRST;
1059
1060 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1061 if (ret < 0) {
1062 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1063 return ret;
1064 }
1065
1066 timeout = 0;
1067 do {
1068 msleep(10);
1069 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1070 if (ret < 0) {
1071 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1072 return ret;
1073 }
1074 timeout++;
1075 } while ((buf & HW_CFG_LRST) && (timeout < 100));
1076
1077 if (timeout >= 100) {
1078 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1079 return -EIO;
1080 }
1081
1082 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1083
1084 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1085 if (ret < 0) {
1086 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1087 return ret;
1088 }
1089
1090 buf |= PMT_CTL_PHY_RST;
1091
1092 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1093 if (ret < 0) {
1094 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1095 return ret;
1096 }
1097
1098 timeout = 0;
1099 do {
1100 msleep(10);
1101 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1102 if (ret < 0) {
1103 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1104 return ret;
1105 }
1106 timeout++;
1107 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1108
1109 if (timeout >= 100) {
1110 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1111 return -EIO;
1112 }
1113
1114 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1115
1116 ret = smsc75xx_set_mac_address(dev);
1117 if (ret < 0) {
1118 netdev_warn(dev->net, "Failed to set mac address\n");
1119 return ret;
1120 }
1121
1122 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1123 dev->net->dev_addr);
1124
1125 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1126 if (ret < 0) {
1127 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1128 return ret;
1129 }
1130
1131 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1132 buf);
1133
1134 buf |= HW_CFG_BIR;
1135
1136 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1137 if (ret < 0) {
1138 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1139 return ret;
1140 }
1141
1142 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1143 if (ret < 0) {
1144 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1145 return ret;
1146 }
1147
1148 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1149 buf);
1150
1151 if (!turbo_mode) {
1152 buf = 0;
1153 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1154 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1155 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1156 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1157 } else {
1158 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1159 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1160 }
1161
1162 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1163 (ulong)dev->rx_urb_size);
1164
1165 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1166 if (ret < 0) {
1167 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1168 return ret;
1169 }
1170
1171 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1172 if (ret < 0) {
1173 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1174 return ret;
1175 }
1176
1177 netif_dbg(dev, ifup, dev->net,
1178 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1179
1180 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1181 if (ret < 0) {
1182 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1183 return ret;
1184 }
1185
1186 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1187 if (ret < 0) {
1188 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1189 return ret;
1190 }
1191
1192 netif_dbg(dev, ifup, dev->net,
1193 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1194
1195 if (turbo_mode) {
1196 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1197 if (ret < 0) {
1198 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1199 return ret;
1200 }
1201
1202 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1203
1204 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1205
1206 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1207 if (ret < 0) {
1208 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1209 return ret;
1210 }
1211
1212 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1213 if (ret < 0) {
1214 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1215 return ret;
1216 }
1217
1218 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1219 }
1220
1221 /* set FIFO sizes */
1222 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1223 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1224 if (ret < 0) {
1225 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1226 return ret;
1227 }
1228
1229 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1230
1231 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1232 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1233 if (ret < 0) {
1234 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1235 return ret;
1236 }
1237
1238 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1239
1240 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1241 if (ret < 0) {
1242 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1243 return ret;
1244 }
1245
1246 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1247 if (ret < 0) {
1248 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1249 return ret;
1250 }
1251
1252 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1253
1254 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1255 if (ret < 0) {
1256 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1257 return ret;
1258 }
1259
1260 /* only set default GPIO/LED settings if no EEPROM is detected */
1261 if (!(buf & E2P_CMD_LOADED)) {
1262 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1263 if (ret < 0) {
1264 netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1265 return ret;
1266 }
1267
1268 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1269 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1270
1271 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1272 if (ret < 0) {
1273 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1274 return ret;
1275 }
1276 }
1277
1278 ret = smsc75xx_write_reg(dev, FLOW, 0);
1279 if (ret < 0) {
1280 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1281 return ret;
1282 }
1283
1284 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1285 if (ret < 0) {
1286 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1287 return ret;
1288 }
1289
1290 /* Don't need rfe_ctl_lock during initialisation */
1291 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1292 if (ret < 0) {
1293 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1294 return ret;
1295 }
1296
1297 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1298
1299 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1300 if (ret < 0) {
1301 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1302 return ret;
1303 }
1304
1305 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1306 if (ret < 0) {
1307 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1308 return ret;
1309 }
1310
1311 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1312 pdata->rfe_ctl);
1313
1314 /* Enable or disable checksum offload engines */
1315 smsc75xx_set_features(dev->net, dev->net->features);
1316
1317 smsc75xx_set_multicast(dev->net);
1318
1319 ret = smsc75xx_phy_initialize(dev);
1320 if (ret < 0) {
1321 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1322 return ret;
1323 }
1324
1325 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1326 if (ret < 0) {
1327 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1328 return ret;
1329 }
1330
1331 /* enable PHY interrupts */
1332 buf |= INT_ENP_PHY_INT;
1333
1334 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1335 if (ret < 0) {
1336 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1337 return ret;
1338 }
1339
1340 /* allow mac to detect speed and duplex from phy */
1341 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1342 if (ret < 0) {
1343 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1344 return ret;
1345 }
1346
1347 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1348 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1349 if (ret < 0) {
1350 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1351 return ret;
1352 }
1353
1354 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1355 if (ret < 0) {
1356 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1357 return ret;
1358 }
1359
1360 buf |= MAC_TX_TXEN;
1361
1362 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1363 if (ret < 0) {
1364 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1365 return ret;
1366 }
1367
1368 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1369
1370 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1371 if (ret < 0) {
1372 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1373 return ret;
1374 }
1375
1376 buf |= FCT_TX_CTL_EN;
1377
1378 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1379 if (ret < 0) {
1380 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1381 return ret;
1382 }
1383
1384 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1385
1386 ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1387 if (ret < 0) {
1388 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1389 return ret;
1390 }
1391
1392 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1393 if (ret < 0) {
1394 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1395 return ret;
1396 }
1397
1398 buf |= MAC_RX_RXEN;
1399
1400 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1401 if (ret < 0) {
1402 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1403 return ret;
1404 }
1405
1406 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1407
1408 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1409 if (ret < 0) {
1410 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1411 return ret;
1412 }
1413
1414 buf |= FCT_RX_CTL_EN;
1415
1416 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1417 if (ret < 0) {
1418 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1419 return ret;
1420 }
1421
1422 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1423
1424 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1425 return 0;
1426 }
1427
1428 static const struct net_device_ops smsc75xx_netdev_ops = {
1429 .ndo_open = usbnet_open,
1430 .ndo_stop = usbnet_stop,
1431 .ndo_start_xmit = usbnet_start_xmit,
1432 .ndo_tx_timeout = usbnet_tx_timeout,
1433 .ndo_get_stats64 = dev_get_tstats64,
1434 .ndo_change_mtu = smsc75xx_change_mtu,
1435 .ndo_set_mac_address = eth_mac_addr,
1436 .ndo_validate_addr = eth_validate_addr,
1437 .ndo_eth_ioctl = smsc75xx_ioctl,
1438 .ndo_set_rx_mode = smsc75xx_set_multicast,
1439 .ndo_set_features = smsc75xx_set_features,
1440 };
1441
smsc75xx_bind(struct usbnet * dev,struct usb_interface * intf)1442 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1443 {
1444 struct smsc75xx_priv *pdata = NULL;
1445 int ret;
1446
1447 ret = usbnet_get_endpoints(dev, intf);
1448 if (ret < 0) {
1449 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1450 return ret;
1451 }
1452
1453 dev->data[0] = (unsigned long) kzalloc_obj(struct smsc75xx_priv);
1454
1455 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1456 if (!pdata)
1457 return -ENOMEM;
1458
1459 pdata->dev = dev;
1460
1461 spin_lock_init(&pdata->rfe_ctl_lock);
1462 mutex_init(&pdata->dataport_mutex);
1463
1464 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1465
1466 if (DEFAULT_TX_CSUM_ENABLE)
1467 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1468
1469 if (DEFAULT_RX_CSUM_ENABLE)
1470 dev->net->features |= NETIF_F_RXCSUM;
1471
1472 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1473 NETIF_F_RXCSUM;
1474
1475 ret = smsc75xx_wait_ready(dev, 0);
1476 if (ret < 0) {
1477 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1478 goto free_pdata;
1479 }
1480
1481 smsc75xx_init_mac_address(dev);
1482
1483 /* Init all registers */
1484 ret = smsc75xx_reset(dev);
1485 if (ret < 0) {
1486 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1487 goto cancel_work;
1488 }
1489
1490 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1491 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1492 dev->net->flags |= IFF_MULTICAST;
1493 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1494 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1495 dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1496 return 0;
1497
1498 cancel_work:
1499 cancel_work_sync(&pdata->set_multicast);
1500 free_pdata:
1501 kfree(pdata);
1502 dev->data[0] = 0;
1503 return ret;
1504 }
1505
smsc75xx_unbind(struct usbnet * dev,struct usb_interface * intf)1506 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1507 {
1508 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1509 if (pdata) {
1510 cancel_work_sync(&pdata->set_multicast);
1511 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1512 kfree(pdata);
1513 dev->data[0] = 0;
1514 }
1515 }
1516
smsc_crc(const u8 * buffer,size_t len)1517 static u16 smsc_crc(const u8 *buffer, size_t len)
1518 {
1519 return bitrev16(crc16(0xFFFF, buffer, len));
1520 }
1521
smsc75xx_write_wuff(struct usbnet * dev,int filter,u32 wuf_cfg,u32 wuf_mask1)1522 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1523 u32 wuf_mask1)
1524 {
1525 int cfg_base = WUF_CFGX + filter * 4;
1526 int mask_base = WUF_MASKX + filter * 16;
1527 int ret;
1528
1529 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1530 if (ret < 0) {
1531 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1532 return ret;
1533 }
1534
1535 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1536 if (ret < 0) {
1537 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1538 return ret;
1539 }
1540
1541 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1542 if (ret < 0) {
1543 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1544 return ret;
1545 }
1546
1547 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1548 if (ret < 0) {
1549 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1550 return ret;
1551 }
1552
1553 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1554 if (ret < 0) {
1555 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1556 return ret;
1557 }
1558
1559 return 0;
1560 }
1561
smsc75xx_enter_suspend0(struct usbnet * dev)1562 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1563 {
1564 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1565 u32 val;
1566 int ret;
1567
1568 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1569 if (ret < 0) {
1570 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1571 return ret;
1572 }
1573
1574 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1575 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1576
1577 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1578 if (ret < 0) {
1579 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1580 return ret;
1581 }
1582
1583 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1584
1585 return 0;
1586 }
1587
smsc75xx_enter_suspend1(struct usbnet * dev)1588 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1589 {
1590 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1591 u32 val;
1592 int ret;
1593
1594 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1595 if (ret < 0) {
1596 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1597 return ret;
1598 }
1599
1600 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1601 val |= PMT_CTL_SUS_MODE_1;
1602
1603 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1604 if (ret < 0) {
1605 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1606 return ret;
1607 }
1608
1609 /* clear wol status, enable energy detection */
1610 val &= ~PMT_CTL_WUPS;
1611 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
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 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1620
1621 return 0;
1622 }
1623
smsc75xx_enter_suspend2(struct usbnet * dev)1624 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1625 {
1626 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1627 u32 val;
1628 int ret;
1629
1630 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1631 if (ret < 0) {
1632 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1633 return ret;
1634 }
1635
1636 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1637 val |= PMT_CTL_SUS_MODE_2;
1638
1639 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1640 if (ret < 0) {
1641 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1642 return ret;
1643 }
1644
1645 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1646
1647 return 0;
1648 }
1649
smsc75xx_enter_suspend3(struct usbnet * dev)1650 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1651 {
1652 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1653 u32 val;
1654 int ret;
1655
1656 ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1657 if (ret < 0) {
1658 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1659 return ret;
1660 }
1661
1662 if (val & FCT_RX_CTL_RXUSED) {
1663 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1664 return -EBUSY;
1665 }
1666
1667 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1668 if (ret < 0) {
1669 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1670 return ret;
1671 }
1672
1673 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1674 val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1675
1676 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1677 if (ret < 0) {
1678 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1679 return ret;
1680 }
1681
1682 /* clear wol status */
1683 val &= ~PMT_CTL_WUPS;
1684 val |= PMT_CTL_WUPS_WOL;
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 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1693
1694 return 0;
1695 }
1696
smsc75xx_enable_phy_wakeup_interrupts(struct usbnet * dev,u16 mask)1697 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1698 {
1699 struct mii_if_info *mii = &dev->mii;
1700 int ret;
1701
1702 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1703
1704 /* read to clear */
1705 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1706 if (ret < 0) {
1707 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1708 return ret;
1709 }
1710
1711 /* enable interrupt source */
1712 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1713 if (ret < 0) {
1714 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1715 return ret;
1716 }
1717
1718 ret |= mask;
1719
1720 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1721
1722 return 0;
1723 }
1724
smsc75xx_link_ok_nopm(struct usbnet * dev)1725 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1726 {
1727 struct mii_if_info *mii = &dev->mii;
1728 int ret;
1729
1730 /* first, a dummy read, needed to latch some MII phys */
1731 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1732 if (ret < 0) {
1733 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1734 return ret;
1735 }
1736
1737 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1738 if (ret < 0) {
1739 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1740 return ret;
1741 }
1742
1743 return !!(ret & BMSR_LSTATUS);
1744 }
1745
smsc75xx_autosuspend(struct usbnet * dev,u32 link_up)1746 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1747 {
1748 int ret;
1749
1750 if (!netif_running(dev->net)) {
1751 /* interface is ifconfig down so fully power down hw */
1752 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1753 return smsc75xx_enter_suspend2(dev);
1754 }
1755
1756 if (!link_up) {
1757 /* link is down so enter EDPD mode */
1758 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1759
1760 /* enable PHY wakeup events for if cable is attached */
1761 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1762 PHY_INT_MASK_ANEG_COMP);
1763 if (ret < 0) {
1764 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1765 return ret;
1766 }
1767
1768 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1769 return smsc75xx_enter_suspend1(dev);
1770 }
1771
1772 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1773 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1774 PHY_INT_MASK_LINK_DOWN);
1775 if (ret < 0) {
1776 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1777 return ret;
1778 }
1779
1780 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1781 return smsc75xx_enter_suspend3(dev);
1782 }
1783
smsc75xx_suspend(struct usb_interface * intf,pm_message_t message)1784 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1785 {
1786 struct usbnet *dev = usb_get_intfdata(intf);
1787 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1788 u32 val, link_up;
1789 int ret;
1790
1791 ret = usbnet_suspend(intf, message);
1792 if (ret < 0) {
1793 netdev_warn(dev->net, "usbnet_suspend error\n");
1794 return ret;
1795 }
1796
1797 if (pdata->suspend_flags) {
1798 netdev_warn(dev->net, "error during last resume\n");
1799 pdata->suspend_flags = 0;
1800 }
1801
1802 /* determine if link is up using only _nopm functions */
1803 link_up = smsc75xx_link_ok_nopm(dev);
1804
1805 if (message.event == PM_EVENT_AUTO_SUSPEND) {
1806 ret = smsc75xx_autosuspend(dev, link_up);
1807 goto done;
1808 }
1809
1810 /* if we get this far we're not autosuspending */
1811 /* if no wol options set, or if link is down and we're not waking on
1812 * PHY activity, enter lowest power SUSPEND2 mode
1813 */
1814 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1815 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1816 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1817
1818 /* disable energy detect (link up) & wake up events */
1819 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1820 if (ret < 0) {
1821 netdev_warn(dev->net, "Error reading WUCSR\n");
1822 goto done;
1823 }
1824
1825 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1826
1827 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1828 if (ret < 0) {
1829 netdev_warn(dev->net, "Error writing WUCSR\n");
1830 goto done;
1831 }
1832
1833 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1834 if (ret < 0) {
1835 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1836 goto done;
1837 }
1838
1839 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1840
1841 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1842 if (ret < 0) {
1843 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1844 goto done;
1845 }
1846
1847 ret = smsc75xx_enter_suspend2(dev);
1848 goto done;
1849 }
1850
1851 if (pdata->wolopts & WAKE_PHY) {
1852 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1853 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1854 if (ret < 0) {
1855 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1856 goto done;
1857 }
1858
1859 /* if link is down then configure EDPD and enter SUSPEND1,
1860 * otherwise enter SUSPEND0 below
1861 */
1862 if (!link_up) {
1863 struct mii_if_info *mii = &dev->mii;
1864 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1865
1866 /* enable energy detect power-down mode */
1867 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1868 PHY_MODE_CTRL_STS);
1869 if (ret < 0) {
1870 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1871 goto done;
1872 }
1873
1874 ret |= MODE_CTRL_STS_EDPWRDOWN;
1875
1876 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1877 PHY_MODE_CTRL_STS, ret);
1878
1879 /* enter SUSPEND1 mode */
1880 ret = smsc75xx_enter_suspend1(dev);
1881 goto done;
1882 }
1883 }
1884
1885 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1886 int i, filter = 0;
1887
1888 /* disable all filters */
1889 for (i = 0; i < WUF_NUM; i++) {
1890 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1891 if (ret < 0) {
1892 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1893 goto done;
1894 }
1895 }
1896
1897 if (pdata->wolopts & WAKE_MCAST) {
1898 const u8 mcast[] = {0x01, 0x00, 0x5E};
1899 netdev_info(dev->net, "enabling multicast detection\n");
1900
1901 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1902 | smsc_crc(mcast, 3);
1903 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1904 if (ret < 0) {
1905 netdev_warn(dev->net, "Error writing wakeup filter\n");
1906 goto done;
1907 }
1908 }
1909
1910 if (pdata->wolopts & WAKE_ARP) {
1911 const u8 arp[] = {0x08, 0x06};
1912 netdev_info(dev->net, "enabling ARP detection\n");
1913
1914 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1915 | smsc_crc(arp, 2);
1916 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1917 if (ret < 0) {
1918 netdev_warn(dev->net, "Error writing wakeup filter\n");
1919 goto done;
1920 }
1921 }
1922
1923 /* clear any pending pattern match packet status */
1924 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1925 if (ret < 0) {
1926 netdev_warn(dev->net, "Error reading WUCSR\n");
1927 goto done;
1928 }
1929
1930 val |= WUCSR_WUFR;
1931
1932 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1933 if (ret < 0) {
1934 netdev_warn(dev->net, "Error writing WUCSR\n");
1935 goto done;
1936 }
1937
1938 netdev_info(dev->net, "enabling packet match detection\n");
1939 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1940 if (ret < 0) {
1941 netdev_warn(dev->net, "Error reading WUCSR\n");
1942 goto done;
1943 }
1944
1945 val |= WUCSR_WUEN;
1946
1947 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1948 if (ret < 0) {
1949 netdev_warn(dev->net, "Error writing WUCSR\n");
1950 goto done;
1951 }
1952 } else {
1953 netdev_info(dev->net, "disabling packet match detection\n");
1954 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1955 if (ret < 0) {
1956 netdev_warn(dev->net, "Error reading WUCSR\n");
1957 goto done;
1958 }
1959
1960 val &= ~WUCSR_WUEN;
1961
1962 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1963 if (ret < 0) {
1964 netdev_warn(dev->net, "Error writing WUCSR\n");
1965 goto done;
1966 }
1967 }
1968
1969 /* disable magic, bcast & unicast wakeup sources */
1970 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1971 if (ret < 0) {
1972 netdev_warn(dev->net, "Error reading WUCSR\n");
1973 goto done;
1974 }
1975
1976 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1977
1978 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1979 if (ret < 0) {
1980 netdev_warn(dev->net, "Error writing WUCSR\n");
1981 goto done;
1982 }
1983
1984 if (pdata->wolopts & WAKE_PHY) {
1985 netdev_info(dev->net, "enabling PHY wakeup\n");
1986
1987 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1988 if (ret < 0) {
1989 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1990 goto done;
1991 }
1992
1993 /* clear wol status, enable energy detection */
1994 val &= ~PMT_CTL_WUPS;
1995 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1996
1997 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1998 if (ret < 0) {
1999 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2000 goto done;
2001 }
2002 }
2003
2004 if (pdata->wolopts & WAKE_MAGIC) {
2005 netdev_info(dev->net, "enabling magic packet wakeup\n");
2006 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2007 if (ret < 0) {
2008 netdev_warn(dev->net, "Error reading WUCSR\n");
2009 goto done;
2010 }
2011
2012 /* clear any pending magic packet status */
2013 val |= WUCSR_MPR | WUCSR_MPEN;
2014
2015 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2016 if (ret < 0) {
2017 netdev_warn(dev->net, "Error writing WUCSR\n");
2018 goto done;
2019 }
2020 }
2021
2022 if (pdata->wolopts & WAKE_BCAST) {
2023 netdev_info(dev->net, "enabling broadcast detection\n");
2024 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2025 if (ret < 0) {
2026 netdev_warn(dev->net, "Error reading WUCSR\n");
2027 goto done;
2028 }
2029
2030 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2031
2032 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2033 if (ret < 0) {
2034 netdev_warn(dev->net, "Error writing WUCSR\n");
2035 goto done;
2036 }
2037 }
2038
2039 if (pdata->wolopts & WAKE_UCAST) {
2040 netdev_info(dev->net, "enabling unicast detection\n");
2041 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2042 if (ret < 0) {
2043 netdev_warn(dev->net, "Error reading WUCSR\n");
2044 goto done;
2045 }
2046
2047 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2048
2049 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2050 if (ret < 0) {
2051 netdev_warn(dev->net, "Error writing WUCSR\n");
2052 goto done;
2053 }
2054 }
2055
2056 /* enable receiver to enable frame reception */
2057 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2058 if (ret < 0) {
2059 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2060 goto done;
2061 }
2062
2063 val |= MAC_RX_RXEN;
2064
2065 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2066 if (ret < 0) {
2067 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2068 goto done;
2069 }
2070
2071 /* some wol options are enabled, so enter SUSPEND0 */
2072 netdev_info(dev->net, "entering SUSPEND0 mode\n");
2073 ret = smsc75xx_enter_suspend0(dev);
2074
2075 done:
2076 /*
2077 * TODO: resume() might need to handle the suspend failure
2078 * in system sleep
2079 */
2080 if (ret && PMSG_IS_AUTO(message))
2081 usbnet_resume(intf);
2082 return ret;
2083 }
2084
smsc75xx_resume(struct usb_interface * intf)2085 static int smsc75xx_resume(struct usb_interface *intf)
2086 {
2087 struct usbnet *dev = usb_get_intfdata(intf);
2088 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2089 u8 suspend_flags = pdata->suspend_flags;
2090 int ret;
2091 u32 val;
2092
2093 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2094
2095 /* do this first to ensure it's cleared even in error case */
2096 pdata->suspend_flags = 0;
2097
2098 if (suspend_flags & SUSPEND_ALLMODES) {
2099 /* Disable wakeup sources */
2100 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2101 if (ret < 0) {
2102 netdev_warn(dev->net, "Error reading WUCSR\n");
2103 return ret;
2104 }
2105
2106 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2107 | WUCSR_BCST_EN);
2108
2109 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2110 if (ret < 0) {
2111 netdev_warn(dev->net, "Error writing WUCSR\n");
2112 return ret;
2113 }
2114
2115 /* clear wake-up status */
2116 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2117 if (ret < 0) {
2118 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2119 return ret;
2120 }
2121
2122 val &= ~PMT_CTL_WOL_EN;
2123 val |= PMT_CTL_WUPS;
2124
2125 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2126 if (ret < 0) {
2127 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2128 return ret;
2129 }
2130 }
2131
2132 if (suspend_flags & SUSPEND_SUSPEND2) {
2133 netdev_info(dev->net, "resuming from SUSPEND2\n");
2134
2135 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2136 if (ret < 0) {
2137 netdev_warn(dev->net, "Error reading PMT_CTL\n");
2138 return ret;
2139 }
2140
2141 val |= PMT_CTL_PHY_PWRUP;
2142
2143 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2144 if (ret < 0) {
2145 netdev_warn(dev->net, "Error writing PMT_CTL\n");
2146 return ret;
2147 }
2148 }
2149
2150 ret = smsc75xx_wait_ready(dev, 1);
2151 if (ret < 0) {
2152 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2153 return ret;
2154 }
2155
2156 return usbnet_resume(intf);
2157 }
2158
smsc75xx_rx_csum_offload(struct usbnet * dev,struct sk_buff * skb,u32 rx_cmd_a,u32 rx_cmd_b)2159 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2160 u32 rx_cmd_a, u32 rx_cmd_b)
2161 {
2162 if (!(dev->net->features & NETIF_F_RXCSUM) ||
2163 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2164 skb->ip_summed = CHECKSUM_NONE;
2165 } else {
2166 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2167 skb->ip_summed = CHECKSUM_COMPLETE;
2168 }
2169 }
2170
smsc75xx_rx_fixup(struct usbnet * dev,struct sk_buff * skb)2171 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2172 {
2173 /* This check is no longer done by usbnet */
2174 if (skb->len < dev->net->hard_header_len)
2175 return 0;
2176
2177 while (skb->len > 0) {
2178 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2179 struct sk_buff *ax_skb;
2180 unsigned char *packet;
2181
2182 rx_cmd_a = get_unaligned_le32(skb->data);
2183 skb_pull(skb, 4);
2184
2185 rx_cmd_b = get_unaligned_le32(skb->data);
2186 skb_pull(skb, 4 + RXW_PADDING);
2187
2188 packet = skb->data;
2189
2190 /* get the packet length */
2191 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2192 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2193
2194 if (unlikely(size > skb->len)) {
2195 netif_dbg(dev, rx_err, dev->net,
2196 "size err rx_cmd_a=0x%08x\n",
2197 rx_cmd_a);
2198 return 0;
2199 }
2200
2201 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2202 netif_dbg(dev, rx_err, dev->net,
2203 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2204 dev->net->stats.rx_errors++;
2205 dev->net->stats.rx_dropped++;
2206
2207 if (rx_cmd_a & RX_CMD_A_FCS)
2208 dev->net->stats.rx_crc_errors++;
2209 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2210 dev->net->stats.rx_frame_errors++;
2211 } else {
2212 /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2213 if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2214 netif_dbg(dev, rx_err, dev->net,
2215 "size err rx_cmd_a=0x%08x\n",
2216 rx_cmd_a);
2217 return 0;
2218 }
2219
2220 /* last frame in this batch */
2221 if (skb->len == size) {
2222 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2223 rx_cmd_b);
2224
2225 skb_trim(skb, skb->len - 4); /* remove fcs */
2226
2227 return 1;
2228 }
2229
2230 /* Use "size - 4" to remove fcs */
2231 ax_skb = netdev_alloc_skb_ip_align(dev->net, size - 4);
2232 if (unlikely(!ax_skb)) {
2233 netdev_warn(dev->net, "Error allocating skb\n");
2234 return 0;
2235 }
2236
2237 skb_put(ax_skb, size - 4);
2238 memcpy(ax_skb->data, packet, size - 4);
2239
2240 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2241 rx_cmd_b);
2242
2243 usbnet_skb_return(dev, ax_skb);
2244 }
2245
2246 skb_pull(skb, size);
2247
2248 /* padding bytes before the next frame starts */
2249 if (skb->len)
2250 skb_pull(skb, align_count);
2251 }
2252
2253 return 1;
2254 }
2255
smsc75xx_tx_fixup(struct usbnet * dev,struct sk_buff * skb,gfp_t flags)2256 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2257 struct sk_buff *skb, gfp_t flags)
2258 {
2259 u32 tx_cmd_a, tx_cmd_b;
2260 void *ptr;
2261
2262 if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2263 dev_kfree_skb_any(skb);
2264 return NULL;
2265 }
2266
2267 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2268
2269 if (skb->ip_summed == CHECKSUM_PARTIAL)
2270 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2271
2272 if (skb_is_gso(skb)) {
2273 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2274 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2275
2276 tx_cmd_a |= TX_CMD_A_LSO;
2277 } else {
2278 tx_cmd_b = 0;
2279 }
2280
2281 ptr = skb_push(skb, 8);
2282 put_unaligned_le32(tx_cmd_a, ptr);
2283 put_unaligned_le32(tx_cmd_b, ptr + 4);
2284
2285 return skb;
2286 }
2287
smsc75xx_manage_power(struct usbnet * dev,int on)2288 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2289 {
2290 dev->intf->needs_remote_wakeup = on;
2291 return 0;
2292 }
2293
2294 static const struct driver_info smsc75xx_info = {
2295 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
2296 .bind = smsc75xx_bind,
2297 .unbind = smsc75xx_unbind,
2298 .link_reset = smsc75xx_link_reset,
2299 .reset = smsc75xx_reset,
2300 .rx_fixup = smsc75xx_rx_fixup,
2301 .tx_fixup = smsc75xx_tx_fixup,
2302 .status = smsc75xx_status,
2303 .manage_power = smsc75xx_manage_power,
2304 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2305 };
2306
2307 static const struct usb_device_id products[] = {
2308 {
2309 /* SMSC7500 USB Gigabit Ethernet Device */
2310 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2311 .driver_info = (unsigned long) &smsc75xx_info,
2312 },
2313 {
2314 /* SMSC7500 USB Gigabit Ethernet Device */
2315 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2316 .driver_info = (unsigned long) &smsc75xx_info,
2317 },
2318 { }, /* END */
2319 };
2320 MODULE_DEVICE_TABLE(usb, products);
2321
2322 static struct usb_driver smsc75xx_driver = {
2323 .name = SMSC_CHIPNAME,
2324 .id_table = products,
2325 .probe = usbnet_probe,
2326 .suspend = smsc75xx_suspend,
2327 .resume = smsc75xx_resume,
2328 .reset_resume = smsc75xx_resume,
2329 .disconnect = usbnet_disconnect,
2330 .disable_hub_initiated_lpm = 1,
2331 .supports_autosuspend = 1,
2332 };
2333
2334 module_usb_driver(smsc75xx_driver);
2335
2336 MODULE_AUTHOR("Nancy Lin");
2337 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2338 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2339 MODULE_LICENSE("GPL");
2340