1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /***************************************************************************
3 *
4 * Copyright (C) 2007-2008 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 <linux/irq.h>
22 #include <linux/irqdomain.h>
23 #include <linux/mdio.h>
24 #include <linux/phy.h>
25 #include <net/selftests.h>
26
27 #include "smsc95xx.h"
28
29 #define SMSC_CHIPNAME "smsc95xx"
30 #define HS_USB_PKT_SIZE (512)
31 #define FS_USB_PKT_SIZE (64)
32 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
33 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
34 #define DEFAULT_BULK_IN_DELAY (0x00002000)
35 #define MAX_SINGLE_PACKET_SIZE (2048)
36 #define LAN95XX_EEPROM_MAGIC (0x9500)
37 #define EEPROM_MAC_OFFSET (0x01)
38 #define DEFAULT_TX_CSUM_ENABLE (true)
39 #define DEFAULT_RX_CSUM_ENABLE (true)
40 #define SMSC95XX_INTERNAL_PHY_ID (1)
41 #define SMSC95XX_TX_OVERHEAD (8)
42 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
43 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
44 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
45
46 #define FEATURE_8_WAKEUP_FILTERS (0x01)
47 #define FEATURE_PHY_NLP_CROSSOVER (0x02)
48 #define FEATURE_REMOTE_WAKEUP (0x04)
49
50 #define SUSPEND_SUSPEND0 (0x01)
51 #define SUSPEND_SUSPEND1 (0x02)
52 #define SUSPEND_SUSPEND2 (0x04)
53 #define SUSPEND_SUSPEND3 (0x08)
54 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
55 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
56
57 #define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */
58 #define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1)
59
60 struct smsc95xx_priv {
61 u32 mac_cr;
62 u32 hash_hi;
63 u32 hash_lo;
64 u32 wolopts;
65 bool pause_rx;
66 bool pause_tx;
67 bool pause_autoneg;
68 spinlock_t mac_cr_lock;
69 u8 features;
70 u8 suspend_flags;
71 bool is_internal_phy;
72 struct irq_chip irqchip;
73 struct irq_domain *irqdomain;
74 struct fwnode_handle *irqfwnode;
75 struct mii_bus *mdiobus;
76 struct phy_device *phydev;
77 struct task_struct *pm_task;
78 };
79
80 static bool turbo_mode = true;
81 module_param(turbo_mode, bool, 0644);
82 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
83
smsc95xx_read_reg(struct usbnet * dev,u32 index,u32 * data)84 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
85 u32 *data)
86 {
87 struct smsc95xx_priv *pdata = dev->driver_priv;
88 u32 buf;
89 int ret;
90 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
91
92 if (current != pdata->pm_task)
93 fn = usbnet_read_cmd;
94 else
95 fn = usbnet_read_cmd_nopm;
96
97 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
98 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
99 0, index, &buf, 4);
100 if (ret < 4) {
101 ret = ret < 0 ? ret : -ENODATA;
102
103 if (ret != -ENODEV)
104 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
105 index, ret);
106 return ret;
107 }
108
109 le32_to_cpus(&buf);
110 *data = buf;
111
112 return ret;
113 }
114
smsc95xx_write_reg(struct usbnet * dev,u32 index,u32 data)115 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
116 u32 data)
117 {
118 struct smsc95xx_priv *pdata = dev->driver_priv;
119 u32 buf;
120 int ret;
121 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
122
123 if (current != pdata->pm_task)
124 fn = usbnet_write_cmd;
125 else
126 fn = usbnet_write_cmd_nopm;
127
128 buf = data;
129 cpu_to_le32s(&buf);
130
131 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
132 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
133 0, index, &buf, 4);
134 if (ret < 0 && ret != -ENODEV)
135 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
136 index, ret);
137
138 return ret;
139 }
140
141 /* Loop until the read is completed with timeout
142 * called with phy_mutex held */
smsc95xx_phy_wait_not_busy(struct usbnet * dev)143 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
144 {
145 unsigned long start_time = jiffies;
146 u32 val;
147 int ret;
148
149 do {
150 ret = smsc95xx_read_reg(dev, MII_ADDR, &val);
151 if (ret < 0) {
152 /* Ignore -ENODEV error during disconnect() */
153 if (ret == -ENODEV)
154 return 0;
155 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
156 return ret;
157 }
158
159 if (!(val & MII_BUSY_))
160 return 0;
161 } while (!time_after(jiffies, start_time + HZ));
162
163 return -EIO;
164 }
165
mii_address_cmd(int phy_id,int idx,u16 op)166 static u32 mii_address_cmd(int phy_id, int idx, u16 op)
167 {
168 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op;
169 }
170
smsc95xx_mdio_read(struct usbnet * dev,int phy_id,int idx)171 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx)
172 {
173 u32 val, addr;
174 int ret;
175
176 mutex_lock(&dev->phy_mutex);
177
178 /* confirm MII not busy */
179 ret = smsc95xx_phy_wait_not_busy(dev);
180 if (ret < 0) {
181 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
182 goto done;
183 }
184
185 /* set the address, index & direction (read from PHY) */
186 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_);
187 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
188 if (ret < 0) {
189 if (ret != -ENODEV)
190 netdev_warn(dev->net, "Error writing MII_ADDR\n");
191 goto done;
192 }
193
194 ret = smsc95xx_phy_wait_not_busy(dev);
195 if (ret < 0) {
196 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
197 goto done;
198 }
199
200 ret = smsc95xx_read_reg(dev, MII_DATA, &val);
201 if (ret < 0) {
202 if (ret != -ENODEV)
203 netdev_warn(dev->net, "Error reading MII_DATA\n");
204 goto done;
205 }
206
207 ret = (u16)(val & 0xFFFF);
208
209 done:
210 mutex_unlock(&dev->phy_mutex);
211
212 /* Ignore -ENODEV error during disconnect() */
213 if (ret == -ENODEV)
214 return 0;
215 return ret;
216 }
217
smsc95xx_mdio_write(struct usbnet * dev,int phy_id,int idx,int regval)218 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx,
219 int regval)
220 {
221 u32 val, addr;
222 int ret;
223
224 mutex_lock(&dev->phy_mutex);
225
226 /* confirm MII not busy */
227 ret = smsc95xx_phy_wait_not_busy(dev);
228 if (ret < 0) {
229 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
230 goto done;
231 }
232
233 val = regval;
234 ret = smsc95xx_write_reg(dev, MII_DATA, val);
235 if (ret < 0) {
236 if (ret != -ENODEV)
237 netdev_warn(dev->net, "Error writing MII_DATA\n");
238 goto done;
239 }
240
241 /* set the address, index & direction (write to PHY) */
242 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_);
243 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
244 if (ret < 0) {
245 if (ret != -ENODEV)
246 netdev_warn(dev->net, "Error writing MII_ADDR\n");
247 goto done;
248 }
249
250 ret = smsc95xx_phy_wait_not_busy(dev);
251 if (ret < 0) {
252 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
253 goto done;
254 }
255
256 done:
257 mutex_unlock(&dev->phy_mutex);
258 }
259
smsc95xx_mdiobus_reset(struct mii_bus * bus)260 static int smsc95xx_mdiobus_reset(struct mii_bus *bus)
261 {
262 struct smsc95xx_priv *pdata;
263 struct usbnet *dev;
264 u32 val;
265 int ret;
266
267 dev = bus->priv;
268 pdata = dev->driver_priv;
269
270 if (pdata->is_internal_phy)
271 return 0;
272
273 mutex_lock(&dev->phy_mutex);
274
275 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
276 if (ret < 0)
277 goto reset_out;
278
279 val |= PM_CTL_PHY_RST_;
280
281 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
282 if (ret < 0)
283 goto reset_out;
284
285 /* Driver has no knowledge at this point about the external PHY.
286 * The 802.3 specifies that the reset process shall
287 * be completed within 0.5 s.
288 */
289 fsleep(500000);
290
291 reset_out:
292 mutex_unlock(&dev->phy_mutex);
293
294 return 0;
295 }
296
smsc95xx_mdiobus_read(struct mii_bus * bus,int phy_id,int idx)297 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
298 {
299 struct usbnet *dev = bus->priv;
300
301 return smsc95xx_mdio_read(dev, phy_id, idx);
302 }
303
smsc95xx_mdiobus_write(struct mii_bus * bus,int phy_id,int idx,u16 regval)304 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
305 u16 regval)
306 {
307 struct usbnet *dev = bus->priv;
308
309 smsc95xx_mdio_write(dev, phy_id, idx, regval);
310 return 0;
311 }
312
smsc95xx_wait_eeprom(struct usbnet * dev)313 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
314 {
315 unsigned long start_time = jiffies;
316 u32 val;
317 int ret;
318
319 do {
320 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
321 if (ret < 0) {
322 netdev_warn(dev->net, "Error reading E2P_CMD\n");
323 return ret;
324 }
325
326 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
327 break;
328 udelay(40);
329 } while (!time_after(jiffies, start_time + HZ));
330
331 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
332 netdev_warn(dev->net, "EEPROM read operation timeout\n");
333 return -EIO;
334 }
335
336 return 0;
337 }
338
smsc95xx_eeprom_confirm_not_busy(struct usbnet * dev)339 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
340 {
341 unsigned long start_time = jiffies;
342 u32 val;
343 int ret;
344
345 do {
346 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
347 if (ret < 0) {
348 netdev_warn(dev->net, "Error reading E2P_CMD\n");
349 return ret;
350 }
351
352 if (!(val & E2P_CMD_BUSY_))
353 return 0;
354
355 udelay(40);
356 } while (!time_after(jiffies, start_time + HZ));
357
358 netdev_warn(dev->net, "EEPROM is busy\n");
359 return -EIO;
360 }
361
smsc95xx_read_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)362 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
363 u8 *data)
364 {
365 u32 val;
366 int i, ret;
367
368 BUG_ON(!dev);
369 BUG_ON(!data);
370
371 ret = smsc95xx_eeprom_confirm_not_busy(dev);
372 if (ret)
373 return ret;
374
375 for (i = 0; i < length; i++) {
376 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
377 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
378 if (ret < 0) {
379 netdev_warn(dev->net, "Error writing E2P_CMD\n");
380 return ret;
381 }
382
383 ret = smsc95xx_wait_eeprom(dev);
384 if (ret < 0)
385 return ret;
386
387 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
388 if (ret < 0) {
389 netdev_warn(dev->net, "Error reading E2P_DATA\n");
390 return ret;
391 }
392
393 data[i] = val & 0xFF;
394 offset++;
395 }
396
397 return 0;
398 }
399
smsc95xx_write_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)400 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
401 u8 *data)
402 {
403 u32 val;
404 int i, ret;
405
406 BUG_ON(!dev);
407 BUG_ON(!data);
408
409 ret = smsc95xx_eeprom_confirm_not_busy(dev);
410 if (ret)
411 return ret;
412
413 /* Issue write/erase enable command */
414 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
415 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
416 if (ret < 0) {
417 netdev_warn(dev->net, "Error writing E2P_DATA\n");
418 return ret;
419 }
420
421 ret = smsc95xx_wait_eeprom(dev);
422 if (ret < 0)
423 return ret;
424
425 for (i = 0; i < length; i++) {
426
427 /* Fill data register */
428 val = data[i];
429 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
430 if (ret < 0) {
431 netdev_warn(dev->net, "Error writing E2P_DATA\n");
432 return ret;
433 }
434
435 /* Send "write" command */
436 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
437 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
438 if (ret < 0) {
439 netdev_warn(dev->net, "Error writing E2P_CMD\n");
440 return ret;
441 }
442
443 ret = smsc95xx_wait_eeprom(dev);
444 if (ret < 0)
445 return ret;
446
447 offset++;
448 }
449
450 return 0;
451 }
452
smsc95xx_write_reg_async(struct usbnet * dev,u16 index,u32 data)453 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
454 u32 data)
455 {
456 const u16 size = 4;
457 u32 buf;
458 int ret;
459
460 buf = data;
461 cpu_to_le32s(&buf);
462
463 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
464 USB_DIR_OUT | USB_TYPE_VENDOR |
465 USB_RECIP_DEVICE,
466 0, index, &buf, size);
467 if (ret < 0)
468 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
469 ret);
470 return ret;
471 }
472
473 /* returns hash bit number for given MAC address
474 * example:
475 * 01 00 5E 00 00 01 -> returns bit number 31 */
smsc95xx_hash(char addr[ETH_ALEN])476 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
477 {
478 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
479 }
480
smsc95xx_set_multicast(struct net_device * netdev)481 static void smsc95xx_set_multicast(struct net_device *netdev)
482 {
483 struct usbnet *dev = netdev_priv(netdev);
484 struct smsc95xx_priv *pdata = dev->driver_priv;
485 unsigned long flags;
486 int ret;
487
488 pdata->hash_hi = 0;
489 pdata->hash_lo = 0;
490
491 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
492
493 if (dev->net->flags & IFF_PROMISC) {
494 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
495 pdata->mac_cr |= MAC_CR_PRMS_;
496 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
497 } else if (dev->net->flags & IFF_ALLMULTI) {
498 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
499 pdata->mac_cr |= MAC_CR_MCPAS_;
500 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
501 } else if (!netdev_mc_empty(dev->net)) {
502 struct netdev_hw_addr *ha;
503
504 pdata->mac_cr |= MAC_CR_HPFILT_;
505 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
506
507 netdev_for_each_mc_addr(ha, netdev) {
508 u32 bitnum = smsc95xx_hash(ha->addr);
509 u32 mask = 0x01 << (bitnum & 0x1F);
510 if (bitnum & 0x20)
511 pdata->hash_hi |= mask;
512 else
513 pdata->hash_lo |= mask;
514 }
515
516 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
517 pdata->hash_hi, pdata->hash_lo);
518 } else {
519 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
520 pdata->mac_cr &=
521 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
522 }
523
524 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
525
526 /* Initiate async writes, as we can't wait for completion here */
527 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
528 if (ret < 0)
529 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
530
531 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
532 if (ret < 0)
533 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
534
535 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
536 if (ret < 0)
537 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
538 }
539
smsc95xx_phy_update_flowcontrol(struct usbnet * dev)540 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev)
541 {
542 struct smsc95xx_priv *pdata = dev->driver_priv;
543 u32 flow = 0, afc_cfg;
544
545 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
546 if (ret < 0)
547 return ret;
548
549 if (pdata->phydev->duplex == DUPLEX_FULL) {
550 bool tx_pause, rx_pause;
551
552 if (pdata->phydev->autoneg == AUTONEG_ENABLE &&
553 pdata->pause_autoneg) {
554 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause);
555 } else {
556 tx_pause = pdata->pause_tx;
557 rx_pause = pdata->pause_rx;
558 }
559
560 if (rx_pause)
561 flow = 0xFFFF0002;
562
563 if (tx_pause) {
564 afc_cfg |= 0xF;
565 flow |= 0xFFFF0000;
566 } else {
567 afc_cfg &= ~0xF;
568 }
569
570 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
571 rx_pause ? "enabled" : "disabled",
572 tx_pause ? "enabled" : "disabled");
573 } else {
574 netif_dbg(dev, link, dev->net, "half duplex\n");
575 afc_cfg |= 0xF;
576 }
577
578 ret = smsc95xx_write_reg(dev, FLOW, flow);
579 if (ret < 0)
580 return ret;
581
582 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
583 }
584
smsc95xx_mac_update_fullduplex(struct usbnet * dev)585 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev)
586 {
587 struct smsc95xx_priv *pdata = dev->driver_priv;
588 unsigned long flags;
589 int ret;
590
591 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
592 if (pdata->phydev->duplex != DUPLEX_FULL) {
593 pdata->mac_cr &= ~MAC_CR_FDPX_;
594 pdata->mac_cr |= MAC_CR_RCVOWN_;
595 } else {
596 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
597 pdata->mac_cr |= MAC_CR_FDPX_;
598 }
599 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
600
601 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
602 if (ret < 0) {
603 if (ret != -ENODEV)
604 netdev_warn(dev->net,
605 "Error updating MAC full duplex mode\n");
606 return;
607 }
608
609 ret = smsc95xx_phy_update_flowcontrol(dev);
610 if (ret < 0)
611 netdev_warn(dev->net, "Error updating PHY flow control\n");
612 }
613
smsc95xx_status(struct usbnet * dev,struct urb * urb)614 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
615 {
616 struct smsc95xx_priv *pdata = dev->driver_priv;
617 unsigned long flags;
618 u32 intdata;
619
620 if (urb->actual_length != 4) {
621 netdev_warn(dev->net, "unexpected urb length %d\n",
622 urb->actual_length);
623 return;
624 }
625
626 intdata = get_unaligned_le32(urb->transfer_buffer);
627 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
628
629 local_irq_save(flags);
630
631 if (intdata & INT_ENP_PHY_INT_)
632 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ);
633 else
634 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
635 intdata);
636
637 local_irq_restore(flags);
638 }
639
640 /* Enable or disable Tx & Rx checksum offload engines */
smsc95xx_set_features(struct net_device * netdev,netdev_features_t features)641 static int smsc95xx_set_features(struct net_device *netdev,
642 netdev_features_t features)
643 {
644 struct usbnet *dev = netdev_priv(netdev);
645 u32 read_buf;
646 int ret;
647
648 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
649 if (ret < 0)
650 return ret;
651
652 if (features & NETIF_F_IP_CSUM)
653 read_buf |= Tx_COE_EN_;
654 else
655 read_buf &= ~Tx_COE_EN_;
656
657 if (features & NETIF_F_RXCSUM)
658 read_buf |= Rx_COE_EN_;
659 else
660 read_buf &= ~Rx_COE_EN_;
661
662 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
663 if (ret < 0)
664 return ret;
665
666 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
667 return 0;
668 }
669
smsc95xx_ethtool_get_eeprom_len(struct net_device * net)670 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
671 {
672 return MAX_EEPROM_SIZE;
673 }
674
smsc95xx_ethtool_get_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)675 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
676 struct ethtool_eeprom *ee, u8 *data)
677 {
678 struct usbnet *dev = netdev_priv(netdev);
679
680 ee->magic = LAN95XX_EEPROM_MAGIC;
681
682 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
683 }
684
smsc95xx_ethtool_set_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)685 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
686 struct ethtool_eeprom *ee, u8 *data)
687 {
688 struct usbnet *dev = netdev_priv(netdev);
689
690 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
691 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
692 ee->magic);
693 return -EINVAL;
694 }
695
696 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
697 }
698
smsc95xx_ethtool_getregslen(struct net_device * netdev)699 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
700 {
701 /* all smsc95xx registers */
702 return COE_CR - ID_REV + sizeof(u32);
703 }
704
705 static void
smsc95xx_ethtool_getregs(struct net_device * netdev,struct ethtool_regs * regs,void * buf)706 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
707 void *buf)
708 {
709 struct usbnet *dev = netdev_priv(netdev);
710 unsigned int i, j;
711 int retval;
712 u32 *data = buf;
713
714 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version);
715 if (retval < 0) {
716 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
717 return;
718 }
719
720 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
721 retval = smsc95xx_read_reg(dev, i, &data[j]);
722 if (retval < 0) {
723 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
724 return;
725 }
726 }
727 }
728
smsc95xx_ethtool_get_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)729 static void smsc95xx_ethtool_get_wol(struct net_device *net,
730 struct ethtool_wolinfo *wolinfo)
731 {
732 struct usbnet *dev = netdev_priv(net);
733 struct smsc95xx_priv *pdata = dev->driver_priv;
734
735 wolinfo->supported = SUPPORTED_WAKE;
736 wolinfo->wolopts = pdata->wolopts;
737 }
738
smsc95xx_ethtool_set_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)739 static int smsc95xx_ethtool_set_wol(struct net_device *net,
740 struct ethtool_wolinfo *wolinfo)
741 {
742 struct usbnet *dev = netdev_priv(net);
743 struct smsc95xx_priv *pdata = dev->driver_priv;
744 int ret;
745
746 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
747 return -EINVAL;
748
749 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
750
751 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
752 if (ret < 0)
753 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
754
755 return ret;
756 }
757
smsc95xx_get_link(struct net_device * net)758 static u32 smsc95xx_get_link(struct net_device *net)
759 {
760 phy_read_status(net->phydev);
761 return net->phydev->link;
762 }
763
smsc95xx_ethtool_get_strings(struct net_device * netdev,u32 sset,u8 * data)764 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset,
765 u8 *data)
766 {
767 switch (sset) {
768 case ETH_SS_TEST:
769 net_selftest_get_strings(data);
770 break;
771 }
772 }
773
smsc95xx_ethtool_get_sset_count(struct net_device * ndev,int sset)774 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset)
775 {
776 switch (sset) {
777 case ETH_SS_TEST:
778 return net_selftest_get_count();
779 default:
780 return -EOPNOTSUPP;
781 }
782 }
783
smsc95xx_get_pauseparam(struct net_device * ndev,struct ethtool_pauseparam * pause)784 static void smsc95xx_get_pauseparam(struct net_device *ndev,
785 struct ethtool_pauseparam *pause)
786 {
787 struct smsc95xx_priv *pdata;
788 struct usbnet *dev;
789
790 dev = netdev_priv(ndev);
791 pdata = dev->driver_priv;
792
793 pause->autoneg = pdata->pause_autoneg;
794 pause->rx_pause = pdata->pause_rx;
795 pause->tx_pause = pdata->pause_tx;
796 }
797
smsc95xx_set_pauseparam(struct net_device * ndev,struct ethtool_pauseparam * pause)798 static int smsc95xx_set_pauseparam(struct net_device *ndev,
799 struct ethtool_pauseparam *pause)
800 {
801 bool pause_autoneg_rx, pause_autoneg_tx;
802 struct smsc95xx_priv *pdata;
803 struct phy_device *phydev;
804 struct usbnet *dev;
805
806 dev = netdev_priv(ndev);
807 pdata = dev->driver_priv;
808 phydev = ndev->phydev;
809
810 if (!phydev)
811 return -ENODEV;
812
813 pdata->pause_rx = pause->rx_pause;
814 pdata->pause_tx = pause->tx_pause;
815 pdata->pause_autoneg = pause->autoneg;
816
817 if (pause->autoneg) {
818 pause_autoneg_rx = pause->rx_pause;
819 pause_autoneg_tx = pause->tx_pause;
820 } else {
821 pause_autoneg_rx = false;
822 pause_autoneg_tx = false;
823 }
824
825 phy_set_asym_pause(ndev->phydev, pause_autoneg_rx, pause_autoneg_tx);
826 if (phydev->link && (!pause->autoneg ||
827 phydev->autoneg == AUTONEG_DISABLE))
828 smsc95xx_mac_update_fullduplex(dev);
829
830 return 0;
831 }
832
833 static const struct ethtool_ops smsc95xx_ethtool_ops = {
834 .get_link = smsc95xx_get_link,
835 .nway_reset = phy_ethtool_nway_reset,
836 .get_drvinfo = usbnet_get_drvinfo,
837 .get_msglevel = usbnet_get_msglevel,
838 .set_msglevel = usbnet_set_msglevel,
839 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
840 .get_eeprom = smsc95xx_ethtool_get_eeprom,
841 .set_eeprom = smsc95xx_ethtool_set_eeprom,
842 .get_regs_len = smsc95xx_ethtool_getregslen,
843 .get_regs = smsc95xx_ethtool_getregs,
844 .get_wol = smsc95xx_ethtool_get_wol,
845 .set_wol = smsc95xx_ethtool_set_wol,
846 .get_link_ksettings = phy_ethtool_get_link_ksettings,
847 .set_link_ksettings = phy_ethtool_set_link_ksettings,
848 .get_ts_info = ethtool_op_get_ts_info,
849 .self_test = net_selftest,
850 .get_strings = smsc95xx_ethtool_get_strings,
851 .get_sset_count = smsc95xx_ethtool_get_sset_count,
852 .get_pauseparam = smsc95xx_get_pauseparam,
853 .set_pauseparam = smsc95xx_set_pauseparam,
854 };
855
smsc95xx_init_mac_address(struct usbnet * dev)856 static void smsc95xx_init_mac_address(struct usbnet *dev)
857 {
858 u8 addr[ETH_ALEN];
859
860 /* maybe the boot loader passed the MAC address in devicetree */
861 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
862 if (is_valid_ether_addr(dev->net->dev_addr)) {
863 /* device tree values are valid so use them */
864 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
865 return;
866 }
867 }
868
869 /* try reading mac address from EEPROM */
870 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
871 eth_hw_addr_set(dev->net, addr);
872 if (is_valid_ether_addr(dev->net->dev_addr)) {
873 /* eeprom values are valid so use them */
874 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
875 return;
876 }
877 }
878
879 /* no useful static MAC address found. generate a random one */
880 eth_hw_addr_random(dev->net);
881 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
882 }
883
smsc95xx_set_mac_address(struct usbnet * dev)884 static int smsc95xx_set_mac_address(struct usbnet *dev)
885 {
886 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
887 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
888 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
889 int ret;
890
891 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
892 if (ret < 0)
893 return ret;
894
895 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
896 }
897
898 /* starts the TX path */
smsc95xx_start_tx_path(struct usbnet * dev)899 static int smsc95xx_start_tx_path(struct usbnet *dev)
900 {
901 struct smsc95xx_priv *pdata = dev->driver_priv;
902 unsigned long flags;
903 int ret;
904
905 /* Enable Tx at MAC */
906 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
907 pdata->mac_cr |= MAC_CR_TXEN_;
908 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
909
910 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
911 if (ret < 0)
912 return ret;
913
914 /* Enable Tx at SCSRs */
915 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
916 }
917
918 /* Starts the Receive path */
smsc95xx_start_rx_path(struct usbnet * dev)919 static int smsc95xx_start_rx_path(struct usbnet *dev)
920 {
921 struct smsc95xx_priv *pdata = dev->driver_priv;
922 unsigned long flags;
923
924 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
925 pdata->mac_cr |= MAC_CR_RXEN_;
926 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
927
928 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
929 }
930
smsc95xx_reset(struct usbnet * dev)931 static int smsc95xx_reset(struct usbnet *dev)
932 {
933 struct smsc95xx_priv *pdata = dev->driver_priv;
934 u32 read_buf, burst_cap;
935 int ret = 0, timeout;
936
937 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
938
939 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
940 if (ret < 0)
941 return ret;
942
943 timeout = 0;
944 do {
945 msleep(10);
946 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
947 if (ret < 0)
948 return ret;
949 timeout++;
950 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
951
952 if (timeout >= 100) {
953 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
954 return -ETIMEDOUT;
955 }
956
957 ret = smsc95xx_set_mac_address(dev);
958 if (ret < 0)
959 return ret;
960
961 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
962 dev->net->dev_addr);
963
964 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
965 if (ret < 0)
966 return ret;
967
968 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
969 read_buf);
970
971 read_buf |= HW_CFG_BIR_;
972
973 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
974 if (ret < 0)
975 return ret;
976
977 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
978 if (ret < 0)
979 return ret;
980
981 netif_dbg(dev, ifup, dev->net,
982 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
983 read_buf);
984
985 if (!turbo_mode) {
986 burst_cap = 0;
987 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
988 } else if (dev->udev->speed == USB_SPEED_HIGH) {
989 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
990 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
991 } else {
992 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
993 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
994 }
995
996 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
997 (ulong)dev->rx_urb_size);
998
999 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1000 if (ret < 0)
1001 return ret;
1002
1003 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1004 if (ret < 0)
1005 return ret;
1006
1007 netif_dbg(dev, ifup, dev->net,
1008 "Read Value from BURST_CAP after writing: 0x%08x\n",
1009 read_buf);
1010
1011 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1012 if (ret < 0)
1013 return ret;
1014
1015 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1016 if (ret < 0)
1017 return ret;
1018
1019 netif_dbg(dev, ifup, dev->net,
1020 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1021 read_buf);
1022
1023 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1024 if (ret < 0)
1025 return ret;
1026
1027 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1028 read_buf);
1029
1030 if (turbo_mode)
1031 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1032
1033 read_buf &= ~HW_CFG_RXDOFF_;
1034
1035 /* set Rx data offset=2, Make IP header aligns on word boundary. */
1036 read_buf |= NET_IP_ALIGN << 9;
1037
1038 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1039 if (ret < 0)
1040 return ret;
1041
1042 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1043 if (ret < 0)
1044 return ret;
1045
1046 netif_dbg(dev, ifup, dev->net,
1047 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1048
1049 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1050 if (ret < 0)
1051 return ret;
1052
1053 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1054 if (ret < 0)
1055 return ret;
1056 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1057
1058 ret = smsc95xx_read_reg(dev, LED_GPIO_CFG, &read_buf);
1059 if (ret < 0)
1060 return ret;
1061 /* Configure GPIO pins as LED outputs */
1062 read_buf |= LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1063 LED_GPIO_CFG_FDX_LED;
1064 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, read_buf);
1065 if (ret < 0)
1066 return ret;
1067
1068 /* Init Tx */
1069 ret = smsc95xx_write_reg(dev, FLOW, 0);
1070 if (ret < 0)
1071 return ret;
1072
1073 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1074 if (ret < 0)
1075 return ret;
1076
1077 /* Don't need mac_cr_lock during initialisation */
1078 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1079 if (ret < 0)
1080 return ret;
1081
1082 /* Init Rx */
1083 /* Set Vlan */
1084 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1085 if (ret < 0)
1086 return ret;
1087
1088 /* Enable or disable checksum offload engines */
1089 ret = smsc95xx_set_features(dev->net, dev->net->features);
1090 if (ret < 0) {
1091 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1092 return ret;
1093 }
1094
1095 smsc95xx_set_multicast(dev->net);
1096
1097 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1098 if (ret < 0)
1099 return ret;
1100
1101 /* enable PHY interrupts */
1102 read_buf |= INT_EP_CTL_PHY_INT_;
1103
1104 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1105 if (ret < 0)
1106 return ret;
1107
1108 ret = smsc95xx_start_tx_path(dev);
1109 if (ret < 0) {
1110 netdev_warn(dev->net, "Failed to start TX path\n");
1111 return ret;
1112 }
1113
1114 ret = smsc95xx_start_rx_path(dev);
1115 if (ret < 0) {
1116 netdev_warn(dev->net, "Failed to start RX path\n");
1117 return ret;
1118 }
1119
1120 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1121 return 0;
1122 }
1123
1124 static const struct net_device_ops smsc95xx_netdev_ops = {
1125 .ndo_open = usbnet_open,
1126 .ndo_stop = usbnet_stop,
1127 .ndo_start_xmit = usbnet_start_xmit,
1128 .ndo_tx_timeout = usbnet_tx_timeout,
1129 .ndo_change_mtu = usbnet_change_mtu,
1130 .ndo_get_stats64 = dev_get_tstats64,
1131 .ndo_set_mac_address = eth_mac_addr,
1132 .ndo_validate_addr = eth_validate_addr,
1133 .ndo_eth_ioctl = phy_do_ioctl_running,
1134 .ndo_set_rx_mode = smsc95xx_set_multicast,
1135 .ndo_set_features = smsc95xx_set_features,
1136 };
1137
smsc95xx_handle_link_change(struct net_device * net)1138 static void smsc95xx_handle_link_change(struct net_device *net)
1139 {
1140 struct usbnet *dev = netdev_priv(net);
1141
1142 phy_print_status(net->phydev);
1143 smsc95xx_mac_update_fullduplex(dev);
1144 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
1145 }
1146
smsc95xx_bind(struct usbnet * dev,struct usb_interface * intf)1147 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1148 {
1149 struct smsc95xx_priv *pdata;
1150 char usb_path[64];
1151 int ret, phy_irq;
1152 u32 val;
1153
1154 ret = usbnet_get_endpoints(dev, intf);
1155 if (ret < 0) {
1156 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1157 return ret;
1158 }
1159
1160 pdata = kzalloc_obj(*pdata);
1161 if (!pdata)
1162 return -ENOMEM;
1163
1164 dev->driver_priv = pdata;
1165
1166 spin_lock_init(&pdata->mac_cr_lock);
1167
1168 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1169 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1170 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1171 * it is transmitted as all ones. The zero transmitted checksum means
1172 * transmitter generated no checksum. Hence, enable csum offload only
1173 * for ipv4 packets.
1174 */
1175 if (DEFAULT_TX_CSUM_ENABLE)
1176 dev->net->features |= NETIF_F_IP_CSUM;
1177 if (DEFAULT_RX_CSUM_ENABLE)
1178 dev->net->features |= NETIF_F_RXCSUM;
1179
1180 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1181 set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1182
1183 smsc95xx_init_mac_address(dev);
1184
1185 /* Init all registers */
1186 ret = smsc95xx_reset(dev);
1187 if (ret)
1188 goto free_pdata;
1189
1190 /* create irq domain for use by PHY driver and GPIO consumers */
1191 usb_make_path(dev->udev, usb_path, sizeof(usb_path));
1192 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path);
1193 if (!pdata->irqfwnode) {
1194 ret = -ENOMEM;
1195 goto free_pdata;
1196 }
1197
1198 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode,
1199 SMSC95XX_NR_IRQS,
1200 &irq_domain_simple_ops,
1201 pdata);
1202 if (!pdata->irqdomain) {
1203 ret = -ENOMEM;
1204 goto free_irqfwnode;
1205 }
1206
1207 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ);
1208 if (!phy_irq) {
1209 ret = -ENOENT;
1210 goto remove_irqdomain;
1211 }
1212
1213 pdata->irqchip = dummy_irq_chip;
1214 pdata->irqchip.name = SMSC_CHIPNAME;
1215 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip,
1216 handle_simple_irq, "phy");
1217
1218 pdata->mdiobus = mdiobus_alloc();
1219 if (!pdata->mdiobus) {
1220 ret = -ENOMEM;
1221 goto dispose_irq;
1222 }
1223
1224 ret = smsc95xx_read_reg(dev, HW_CFG, &val);
1225 if (ret < 0)
1226 goto free_mdio;
1227
1228 pdata->is_internal_phy = !(val & HW_CFG_PSEL_);
1229 if (pdata->is_internal_phy)
1230 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);
1231
1232 pdata->mdiobus->priv = dev;
1233 pdata->mdiobus->read = smsc95xx_mdiobus_read;
1234 pdata->mdiobus->write = smsc95xx_mdiobus_write;
1235 pdata->mdiobus->reset = smsc95xx_mdiobus_reset;
1236 pdata->mdiobus->name = "smsc95xx-mdiobus";
1237 pdata->mdiobus->parent = &dev->udev->dev;
1238
1239 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id),
1240 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);
1241
1242 ret = mdiobus_register(pdata->mdiobus);
1243 if (ret) {
1244 netdev_err(dev->net, "Could not register MDIO bus\n");
1245 goto free_mdio;
1246 }
1247
1248 pdata->phydev = phy_find_first(pdata->mdiobus);
1249 if (!pdata->phydev) {
1250 netdev_err(dev->net, "no PHY found\n");
1251 ret = -ENODEV;
1252 goto unregister_mdio;
1253 }
1254
1255 pdata->phydev->irq = phy_irq;
1256 pdata->phydev->is_internal = pdata->is_internal_phy;
1257
1258 /* detect device revision as different features may be available */
1259 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1260 if (ret < 0)
1261 goto unregister_mdio;
1262
1263 val >>= 16;
1264 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1265 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1266 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1267 FEATURE_PHY_NLP_CROSSOVER |
1268 FEATURE_REMOTE_WAKEUP);
1269 else if (val == ID_REV_CHIP_ID_9512_)
1270 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1271
1272 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1273 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1274 dev->net->flags |= IFF_MULTICAST;
1275 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1276 dev->net->min_mtu = ETH_MIN_MTU;
1277 dev->net->max_mtu = ETH_DATA_LEN;
1278 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1279
1280 pdata->pause_tx = true;
1281 pdata->pause_rx = true;
1282 pdata->pause_autoneg = true;
1283 phy_support_asym_pause(pdata->phydev);
1284
1285 ret = phy_connect_direct(dev->net, pdata->phydev,
1286 &smsc95xx_handle_link_change,
1287 PHY_INTERFACE_MODE_MII);
1288 if (ret) {
1289 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id);
1290 goto unregister_mdio;
1291 }
1292
1293 phy_attached_info(dev->net->phydev);
1294
1295 return 0;
1296
1297 unregister_mdio:
1298 mdiobus_unregister(pdata->mdiobus);
1299
1300 free_mdio:
1301 mdiobus_free(pdata->mdiobus);
1302
1303 dispose_irq:
1304 irq_dispose_mapping(phy_irq);
1305
1306 remove_irqdomain:
1307 irq_domain_remove(pdata->irqdomain);
1308
1309 free_irqfwnode:
1310 irq_domain_free_fwnode(pdata->irqfwnode);
1311
1312 free_pdata:
1313 kfree(pdata);
1314 return ret;
1315 }
1316
smsc95xx_unbind(struct usbnet * dev,struct usb_interface * intf)1317 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1318 {
1319 struct smsc95xx_priv *pdata = dev->driver_priv;
1320
1321 phy_disconnect(dev->net->phydev);
1322 mdiobus_unregister(pdata->mdiobus);
1323 mdiobus_free(pdata->mdiobus);
1324 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ));
1325 irq_domain_remove(pdata->irqdomain);
1326 irq_domain_free_fwnode(pdata->irqfwnode);
1327 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1328 kfree(pdata);
1329 }
1330
smsc95xx_start_phy(struct usbnet * dev)1331 static int smsc95xx_start_phy(struct usbnet *dev)
1332 {
1333 phy_start(dev->net->phydev);
1334
1335 return 0;
1336 }
1337
smsc95xx_stop(struct usbnet * dev)1338 static int smsc95xx_stop(struct usbnet *dev)
1339 {
1340 phy_stop(dev->net->phydev);
1341
1342 return 0;
1343 }
1344
smsc_crc(const u8 * buffer,size_t len,int filter)1345 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1346 {
1347 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1348 return crc << ((filter % 2) * 16);
1349 }
1350
smsc95xx_link_ok(struct usbnet * dev)1351 static int smsc95xx_link_ok(struct usbnet *dev)
1352 {
1353 struct smsc95xx_priv *pdata = dev->driver_priv;
1354 int ret;
1355
1356 /* first, a dummy read, needed to latch some MII phys */
1357 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1358 if (ret < 0)
1359 return ret;
1360
1361 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1362 if (ret < 0)
1363 return ret;
1364
1365 return !!(ret & BMSR_LSTATUS);
1366 }
1367
smsc95xx_enter_suspend0(struct usbnet * dev)1368 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1369 {
1370 struct smsc95xx_priv *pdata = dev->driver_priv;
1371 u32 val;
1372 int ret;
1373
1374 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1375 if (ret < 0)
1376 return ret;
1377
1378 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1379 val |= PM_CTL_SUS_MODE_0;
1380
1381 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1382 if (ret < 0)
1383 return ret;
1384
1385 /* clear wol status */
1386 val &= ~PM_CTL_WUPS_;
1387 val |= PM_CTL_WUPS_WOL_;
1388
1389 /* enable energy detection */
1390 if (pdata->wolopts & WAKE_PHY)
1391 val |= PM_CTL_WUPS_ED_;
1392
1393 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1394 if (ret < 0)
1395 return ret;
1396
1397 /* read back PM_CTRL */
1398 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1399 if (ret < 0)
1400 return ret;
1401
1402 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1403
1404 return 0;
1405 }
1406
smsc95xx_enter_suspend1(struct usbnet * dev)1407 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1408 {
1409 struct smsc95xx_priv *pdata = dev->driver_priv;
1410 int ret, phy_id = pdata->phydev->mdio.addr;
1411 u32 val;
1412
1413 /* reconfigure link pulse detection timing for
1414 * compatibility with non-standard link partners
1415 */
1416 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1417 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG,
1418 PHY_EDPD_CONFIG_DEFAULT);
1419
1420 /* enable energy detect power-down mode */
1421 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS);
1422 if (ret < 0)
1423 return ret;
1424
1425 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1426
1427 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret);
1428
1429 /* enter SUSPEND1 mode */
1430 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1431 if (ret < 0)
1432 return ret;
1433
1434 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1435 val |= PM_CTL_SUS_MODE_1;
1436
1437 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1438 if (ret < 0)
1439 return ret;
1440
1441 /* clear wol status, enable energy detection */
1442 val &= ~PM_CTL_WUPS_;
1443 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1444
1445 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1446 if (ret < 0)
1447 return ret;
1448
1449 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1450
1451 return 0;
1452 }
1453
smsc95xx_enter_suspend2(struct usbnet * dev)1454 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1455 {
1456 struct smsc95xx_priv *pdata = dev->driver_priv;
1457 u32 val;
1458 int ret;
1459
1460 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1461 if (ret < 0)
1462 return ret;
1463
1464 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1465 val |= PM_CTL_SUS_MODE_2;
1466
1467 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1468 if (ret < 0)
1469 return ret;
1470
1471 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1472
1473 return 0;
1474 }
1475
smsc95xx_enter_suspend3(struct usbnet * dev)1476 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1477 {
1478 struct smsc95xx_priv *pdata = dev->driver_priv;
1479 u32 val;
1480 int ret;
1481
1482 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val);
1483 if (ret < 0)
1484 return ret;
1485
1486 if (val & RX_FIFO_INF_USED_) {
1487 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1488 return -EBUSY;
1489 }
1490
1491 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1492 if (ret < 0)
1493 return ret;
1494
1495 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1496 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1497
1498 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1499 if (ret < 0)
1500 return ret;
1501
1502 /* clear wol status */
1503 val &= ~PM_CTL_WUPS_;
1504 val |= PM_CTL_WUPS_WOL_;
1505
1506 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1507 if (ret < 0)
1508 return ret;
1509
1510 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1511
1512 return 0;
1513 }
1514
smsc95xx_autosuspend(struct usbnet * dev,u32 link_up)1515 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1516 {
1517 struct smsc95xx_priv *pdata = dev->driver_priv;
1518
1519 if (!netif_running(dev->net)) {
1520 /* interface is ifconfig down so fully power down hw */
1521 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1522 return smsc95xx_enter_suspend2(dev);
1523 }
1524
1525 if (!link_up) {
1526 /* link is down so enter EDPD mode, but only if device can
1527 * reliably resume from it. This check should be redundant
1528 * as current FEATURE_REMOTE_WAKEUP parts also support
1529 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1530 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1531 netdev_warn(dev->net, "EDPD not supported\n");
1532 return -EBUSY;
1533 }
1534
1535 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1536 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1537 return smsc95xx_enter_suspend1(dev);
1538 }
1539
1540 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1541 return smsc95xx_enter_suspend3(dev);
1542 }
1543
smsc95xx_suspend(struct usb_interface * intf,pm_message_t message)1544 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1545 {
1546 struct usbnet *dev = usb_get_intfdata(intf);
1547 struct smsc95xx_priv *pdata = dev->driver_priv;
1548 u32 val, link_up;
1549 int ret;
1550
1551 pdata->pm_task = current;
1552
1553 ret = usbnet_suspend(intf, message);
1554 if (ret < 0) {
1555 netdev_warn(dev->net, "usbnet_suspend error\n");
1556 pdata->pm_task = NULL;
1557 return ret;
1558 }
1559
1560 if (pdata->suspend_flags) {
1561 netdev_warn(dev->net, "error during last resume\n");
1562 pdata->suspend_flags = 0;
1563 }
1564
1565 link_up = smsc95xx_link_ok(dev);
1566
1567 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1568 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1569 ret = smsc95xx_autosuspend(dev, link_up);
1570 goto done;
1571 }
1572
1573 /* if we get this far we're not autosuspending */
1574 /* if no wol options set, or if link is down and we're not waking on
1575 * PHY activity, enter lowest power SUSPEND2 mode
1576 */
1577 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1578 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1579 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1580
1581 /* disable energy detect (link up) & wake up events */
1582 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1583 if (ret < 0)
1584 goto done;
1585
1586 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1587
1588 ret = smsc95xx_write_reg(dev, WUCSR, val);
1589 if (ret < 0)
1590 goto done;
1591
1592 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1593 if (ret < 0)
1594 goto done;
1595
1596 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1597
1598 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1599 if (ret < 0)
1600 goto done;
1601
1602 ret = smsc95xx_enter_suspend2(dev);
1603 goto done;
1604 }
1605
1606 if (pdata->wolopts & WAKE_PHY) {
1607 /* if link is down then configure EDPD and enter SUSPEND1,
1608 * otherwise enter SUSPEND0 below
1609 */
1610 if (!link_up) {
1611 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1612 ret = smsc95xx_enter_suspend1(dev);
1613 goto done;
1614 }
1615 }
1616
1617 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1618 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1619 u32 command[2];
1620 u32 offset[2];
1621 u32 crc[4];
1622 int wuff_filter_count =
1623 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1624 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1625 int i, filter = 0;
1626
1627 if (!filter_mask) {
1628 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1629 ret = -ENOMEM;
1630 goto done;
1631 }
1632
1633 memset(command, 0, sizeof(command));
1634 memset(offset, 0, sizeof(offset));
1635 memset(crc, 0, sizeof(crc));
1636
1637 if (pdata->wolopts & WAKE_BCAST) {
1638 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1639 netdev_info(dev->net, "enabling broadcast detection\n");
1640 filter_mask[filter * 4] = 0x003F;
1641 filter_mask[filter * 4 + 1] = 0x00;
1642 filter_mask[filter * 4 + 2] = 0x00;
1643 filter_mask[filter * 4 + 3] = 0x00;
1644 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1645 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1646 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1647 filter++;
1648 }
1649
1650 if (pdata->wolopts & WAKE_MCAST) {
1651 const u8 mcast[] = {0x01, 0x00, 0x5E};
1652 netdev_info(dev->net, "enabling multicast detection\n");
1653 filter_mask[filter * 4] = 0x0007;
1654 filter_mask[filter * 4 + 1] = 0x00;
1655 filter_mask[filter * 4 + 2] = 0x00;
1656 filter_mask[filter * 4 + 3] = 0x00;
1657 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1658 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1659 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1660 filter++;
1661 }
1662
1663 if (pdata->wolopts & WAKE_ARP) {
1664 const u8 arp[] = {0x08, 0x06};
1665 netdev_info(dev->net, "enabling ARP detection\n");
1666 filter_mask[filter * 4] = 0x0003;
1667 filter_mask[filter * 4 + 1] = 0x00;
1668 filter_mask[filter * 4 + 2] = 0x00;
1669 filter_mask[filter * 4 + 3] = 0x00;
1670 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1671 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1672 crc[filter/2] |= smsc_crc(arp, 2, filter);
1673 filter++;
1674 }
1675
1676 if (pdata->wolopts & WAKE_UCAST) {
1677 netdev_info(dev->net, "enabling unicast detection\n");
1678 filter_mask[filter * 4] = 0x003F;
1679 filter_mask[filter * 4 + 1] = 0x00;
1680 filter_mask[filter * 4 + 2] = 0x00;
1681 filter_mask[filter * 4 + 3] = 0x00;
1682 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1683 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1684 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1685 filter++;
1686 }
1687
1688 for (i = 0; i < (wuff_filter_count * 4); i++) {
1689 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]);
1690 if (ret < 0) {
1691 kfree(filter_mask);
1692 goto done;
1693 }
1694 }
1695 kfree(filter_mask);
1696
1697 for (i = 0; i < (wuff_filter_count / 4); i++) {
1698 ret = smsc95xx_write_reg(dev, WUFF, command[i]);
1699 if (ret < 0)
1700 goto done;
1701 }
1702
1703 for (i = 0; i < (wuff_filter_count / 4); i++) {
1704 ret = smsc95xx_write_reg(dev, WUFF, offset[i]);
1705 if (ret < 0)
1706 goto done;
1707 }
1708
1709 for (i = 0; i < (wuff_filter_count / 2); i++) {
1710 ret = smsc95xx_write_reg(dev, WUFF, crc[i]);
1711 if (ret < 0)
1712 goto done;
1713 }
1714
1715 /* clear any pending pattern match packet status */
1716 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1717 if (ret < 0)
1718 goto done;
1719
1720 val |= WUCSR_WUFR_;
1721
1722 ret = smsc95xx_write_reg(dev, WUCSR, val);
1723 if (ret < 0)
1724 goto done;
1725 }
1726
1727 if (pdata->wolopts & WAKE_MAGIC) {
1728 /* clear any pending magic packet status */
1729 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1730 if (ret < 0)
1731 goto done;
1732
1733 val |= WUCSR_MPR_;
1734
1735 ret = smsc95xx_write_reg(dev, WUCSR, val);
1736 if (ret < 0)
1737 goto done;
1738 }
1739
1740 /* enable/disable wakeup sources */
1741 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1742 if (ret < 0)
1743 goto done;
1744
1745 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1746 netdev_info(dev->net, "enabling pattern match wakeup\n");
1747 val |= WUCSR_WAKE_EN_;
1748 } else {
1749 netdev_info(dev->net, "disabling pattern match wakeup\n");
1750 val &= ~WUCSR_WAKE_EN_;
1751 }
1752
1753 if (pdata->wolopts & WAKE_MAGIC) {
1754 netdev_info(dev->net, "enabling magic packet wakeup\n");
1755 val |= WUCSR_MPEN_;
1756 } else {
1757 netdev_info(dev->net, "disabling magic packet wakeup\n");
1758 val &= ~WUCSR_MPEN_;
1759 }
1760
1761 ret = smsc95xx_write_reg(dev, WUCSR, val);
1762 if (ret < 0)
1763 goto done;
1764
1765 /* enable wol wakeup source */
1766 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1767 if (ret < 0)
1768 goto done;
1769
1770 val |= PM_CTL_WOL_EN_;
1771
1772 /* phy energy detect wakeup source */
1773 if (pdata->wolopts & WAKE_PHY)
1774 val |= PM_CTL_ED_EN_;
1775
1776 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1777 if (ret < 0)
1778 goto done;
1779
1780 /* enable receiver to enable frame reception */
1781 smsc95xx_start_rx_path(dev);
1782
1783 /* some wol options are enabled, so enter SUSPEND0 */
1784 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1785 ret = smsc95xx_enter_suspend0(dev);
1786
1787 done:
1788 /*
1789 * TODO: resume() might need to handle the suspend failure
1790 * in system sleep
1791 */
1792 if (ret && PMSG_IS_AUTO(message))
1793 usbnet_resume(intf);
1794
1795 pdata->pm_task = NULL;
1796 return ret;
1797 }
1798
smsc95xx_resume(struct usb_interface * intf)1799 static int smsc95xx_resume(struct usb_interface *intf)
1800 {
1801 struct usbnet *dev = usb_get_intfdata(intf);
1802 struct smsc95xx_priv *pdata;
1803 u8 suspend_flags;
1804 int ret;
1805 u32 val;
1806
1807 BUG_ON(!dev);
1808 pdata = dev->driver_priv;
1809 suspend_flags = pdata->suspend_flags;
1810
1811 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1812
1813 /* do this first to ensure it's cleared even in error case */
1814 pdata->suspend_flags = 0;
1815
1816 pdata->pm_task = current;
1817
1818 if (suspend_flags & SUSPEND_ALLMODES) {
1819 /* clear wake-up sources */
1820 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1821 if (ret < 0)
1822 goto done;
1823
1824 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1825
1826 ret = smsc95xx_write_reg(dev, WUCSR, val);
1827 if (ret < 0)
1828 goto done;
1829
1830 /* clear wake-up status */
1831 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1832 if (ret < 0)
1833 goto done;
1834
1835 val &= ~PM_CTL_WOL_EN_;
1836 val |= PM_CTL_WUPS_;
1837
1838 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1839 if (ret < 0)
1840 goto done;
1841 }
1842
1843 phy_init_hw(pdata->phydev);
1844
1845 ret = usbnet_resume(intf);
1846 if (ret < 0)
1847 netdev_warn(dev->net, "usbnet_resume error\n");
1848
1849 done:
1850 pdata->pm_task = NULL;
1851 return ret;
1852 }
1853
smsc95xx_reset_resume(struct usb_interface * intf)1854 static int smsc95xx_reset_resume(struct usb_interface *intf)
1855 {
1856 struct usbnet *dev = usb_get_intfdata(intf);
1857 struct smsc95xx_priv *pdata = dev->driver_priv;
1858 int ret;
1859
1860 pdata->pm_task = current;
1861 ret = smsc95xx_reset(dev);
1862 pdata->pm_task = NULL;
1863 if (ret < 0)
1864 return ret;
1865
1866 return smsc95xx_resume(intf);
1867 }
1868
smsc95xx_rx_csum_offload(struct sk_buff * skb)1869 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1870 {
1871 u16 *csum_ptr = (u16 *)(skb_tail_pointer(skb) - 2);
1872
1873 skb->csum = (__force __wsum)get_unaligned(csum_ptr);
1874 skb->ip_summed = CHECKSUM_COMPLETE;
1875 skb_trim(skb, skb->len - 2); /* remove csum */
1876 }
1877
smsc95xx_rx_fixup(struct usbnet * dev,struct sk_buff * skb)1878 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1879 {
1880 /* This check is no longer done by usbnet */
1881 if (skb->len < dev->net->hard_header_len)
1882 return 0;
1883
1884 while (skb->len > 0) {
1885 u32 header, align_count;
1886 struct sk_buff *ax_skb;
1887 unsigned char *packet;
1888 u16 size;
1889
1890 header = get_unaligned_le32(skb->data);
1891 skb_pull(skb, 4 + NET_IP_ALIGN);
1892 packet = skb->data;
1893
1894 /* get the packet length */
1895 size = (u16)((header & RX_STS_FL_) >> 16);
1896 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1897
1898 if (unlikely(size > skb->len)) {
1899 netif_dbg(dev, rx_err, dev->net,
1900 "size err header=0x%08x\n", header);
1901 return 0;
1902 }
1903
1904 if (unlikely(header & RX_STS_ES_)) {
1905 netif_dbg(dev, rx_err, dev->net,
1906 "Error header=0x%08x\n", header);
1907 dev->net->stats.rx_errors++;
1908 dev->net->stats.rx_dropped++;
1909
1910 if (header & RX_STS_CRC_) {
1911 dev->net->stats.rx_crc_errors++;
1912 } else {
1913 if (header & (RX_STS_TL_ | RX_STS_RF_))
1914 dev->net->stats.rx_frame_errors++;
1915
1916 if ((header & RX_STS_LE_) &&
1917 (!(header & RX_STS_FT_)))
1918 dev->net->stats.rx_length_errors++;
1919 }
1920 } else {
1921 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1922 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1923 netif_dbg(dev, rx_err, dev->net,
1924 "size err header=0x%08x\n", header);
1925 return 0;
1926 }
1927
1928 /* last frame in this batch */
1929 if (skb->len == size) {
1930 if (dev->net->features & NETIF_F_RXCSUM)
1931 smsc95xx_rx_csum_offload(skb);
1932 skb_trim(skb, skb->len - 4); /* remove fcs */
1933
1934 return 1;
1935 }
1936
1937 ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
1938 if (unlikely(!ax_skb)) {
1939 netdev_warn(dev->net, "Error allocating skb\n");
1940 return 0;
1941 }
1942
1943 skb_put(ax_skb, size);
1944 memcpy(ax_skb->data, packet, size);
1945
1946 if (dev->net->features & NETIF_F_RXCSUM)
1947 smsc95xx_rx_csum_offload(ax_skb);
1948 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1949
1950 usbnet_skb_return(dev, ax_skb);
1951 }
1952
1953 skb_pull(skb, size);
1954
1955 /* padding bytes before the next frame starts */
1956 if (skb->len)
1957 skb_pull(skb, align_count);
1958 }
1959
1960 return 1;
1961 }
1962
smsc95xx_calc_csum_preamble(struct sk_buff * skb)1963 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1964 {
1965 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1966 u16 high_16 = low_16 + skb->csum_offset;
1967 return (high_16 << 16) | low_16;
1968 }
1969
1970 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
1971 * transmission. This is fairly unlikely, only seems to trigger with some
1972 * short TCP ACK packets sent.
1973 *
1974 * Note, this calculation should probably check for the alignment of the
1975 * data as well, but a straight check for csum being in the last four bytes
1976 * of the packet should be ok for now.
1977 */
smsc95xx_can_tx_checksum(struct sk_buff * skb)1978 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
1979 {
1980 unsigned int len = skb->len - skb_checksum_start_offset(skb);
1981
1982 if (skb->len <= 45)
1983 return false;
1984 return skb->csum_offset < (len - (4 + 1));
1985 }
1986
smsc95xx_tx_fixup(struct usbnet * dev,struct sk_buff * skb,gfp_t flags)1987 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1988 struct sk_buff *skb, gfp_t flags)
1989 {
1990 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1991 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1992 u32 tx_cmd_a, tx_cmd_b;
1993 void *ptr;
1994
1995 /* We do not advertise SG, so skbs should be already linearized */
1996 BUG_ON(skb_shinfo(skb)->nr_frags);
1997
1998 /* Make writable and expand header space by overhead if required */
1999 if (skb_cow_head(skb, overhead)) {
2000 /* Must deallocate here as returning NULL to indicate error
2001 * means the skb won't be deallocated in the caller.
2002 */
2003 dev_kfree_skb_any(skb);
2004 return NULL;
2005 }
2006
2007 tx_cmd_b = (u32)skb->len;
2008 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
2009
2010 if (csum) {
2011 if (!smsc95xx_can_tx_checksum(skb)) {
2012 /* workaround - hardware tx checksum does not work
2013 * properly with extremely small packets */
2014 long csstart = skb_checksum_start_offset(skb);
2015 __wsum calc = csum_partial(skb->data + csstart,
2016 skb->len - csstart, 0);
2017 *((__sum16 *)(skb->data + csstart
2018 + skb->csum_offset)) = csum_fold(calc);
2019
2020 csum = false;
2021 } else {
2022 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2023 ptr = skb_push(skb, 4);
2024 put_unaligned_le32(csum_preamble, ptr);
2025
2026 tx_cmd_a += 4;
2027 tx_cmd_b += 4;
2028 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2029 }
2030 }
2031
2032 ptr = skb_push(skb, 8);
2033 put_unaligned_le32(tx_cmd_a, ptr);
2034 put_unaligned_le32(tx_cmd_b, ptr+4);
2035
2036 return skb;
2037 }
2038
smsc95xx_manage_power(struct usbnet * dev,int on)2039 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2040 {
2041 struct smsc95xx_priv *pdata = dev->driver_priv;
2042
2043 dev->intf->needs_remote_wakeup = on;
2044
2045 if (pdata->features & FEATURE_REMOTE_WAKEUP)
2046 return 0;
2047
2048 /* this chip revision isn't capable of remote wakeup */
2049 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2050
2051 if (on)
2052 usb_autopm_get_interface_no_resume(dev->intf);
2053 else
2054 usb_autopm_put_interface(dev->intf);
2055
2056 return 0;
2057 }
2058
2059 static const struct driver_info smsc95xx_info = {
2060 .description = "smsc95xx USB 2.0 Ethernet",
2061 .bind = smsc95xx_bind,
2062 .unbind = smsc95xx_unbind,
2063 .reset = smsc95xx_reset,
2064 .check_connect = smsc95xx_start_phy,
2065 .stop = smsc95xx_stop,
2066 .rx_fixup = smsc95xx_rx_fixup,
2067 .tx_fixup = smsc95xx_tx_fixup,
2068 .status = smsc95xx_status,
2069 .manage_power = smsc95xx_manage_power,
2070 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2071 };
2072
2073 static const struct usb_device_id products[] = {
2074 {
2075 /* SMSC9500 USB Ethernet Device */
2076 USB_DEVICE(0x0424, 0x9500),
2077 .driver_info = (unsigned long) &smsc95xx_info,
2078 },
2079 {
2080 /* SMSC9505 USB Ethernet Device */
2081 USB_DEVICE(0x0424, 0x9505),
2082 .driver_info = (unsigned long) &smsc95xx_info,
2083 },
2084 {
2085 /* SMSC9500A USB Ethernet Device */
2086 USB_DEVICE(0x0424, 0x9E00),
2087 .driver_info = (unsigned long) &smsc95xx_info,
2088 },
2089 {
2090 /* SMSC9505A USB Ethernet Device */
2091 USB_DEVICE(0x0424, 0x9E01),
2092 .driver_info = (unsigned long) &smsc95xx_info,
2093 },
2094 {
2095 /* SMSC9512/9514 USB Hub & Ethernet Device */
2096 USB_DEVICE(0x0424, 0xec00),
2097 .driver_info = (unsigned long) &smsc95xx_info,
2098 },
2099 {
2100 /* SMSC9500 USB Ethernet Device (SAL10) */
2101 USB_DEVICE(0x0424, 0x9900),
2102 .driver_info = (unsigned long) &smsc95xx_info,
2103 },
2104 {
2105 /* SMSC9505 USB Ethernet Device (SAL10) */
2106 USB_DEVICE(0x0424, 0x9901),
2107 .driver_info = (unsigned long) &smsc95xx_info,
2108 },
2109 {
2110 /* SMSC9500A USB Ethernet Device (SAL10) */
2111 USB_DEVICE(0x0424, 0x9902),
2112 .driver_info = (unsigned long) &smsc95xx_info,
2113 },
2114 {
2115 /* SMSC9505A USB Ethernet Device (SAL10) */
2116 USB_DEVICE(0x0424, 0x9903),
2117 .driver_info = (unsigned long) &smsc95xx_info,
2118 },
2119 {
2120 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2121 USB_DEVICE(0x0424, 0x9904),
2122 .driver_info = (unsigned long) &smsc95xx_info,
2123 },
2124 {
2125 /* SMSC9500A USB Ethernet Device (HAL) */
2126 USB_DEVICE(0x0424, 0x9905),
2127 .driver_info = (unsigned long) &smsc95xx_info,
2128 },
2129 {
2130 /* SMSC9505A USB Ethernet Device (HAL) */
2131 USB_DEVICE(0x0424, 0x9906),
2132 .driver_info = (unsigned long) &smsc95xx_info,
2133 },
2134 {
2135 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2136 USB_DEVICE(0x0424, 0x9907),
2137 .driver_info = (unsigned long) &smsc95xx_info,
2138 },
2139 {
2140 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2141 USB_DEVICE(0x0424, 0x9908),
2142 .driver_info = (unsigned long) &smsc95xx_info,
2143 },
2144 {
2145 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2146 USB_DEVICE(0x0424, 0x9909),
2147 .driver_info = (unsigned long) &smsc95xx_info,
2148 },
2149 {
2150 /* SMSC LAN9530 USB Ethernet Device */
2151 USB_DEVICE(0x0424, 0x9530),
2152 .driver_info = (unsigned long) &smsc95xx_info,
2153 },
2154 {
2155 /* SMSC LAN9730 USB Ethernet Device */
2156 USB_DEVICE(0x0424, 0x9730),
2157 .driver_info = (unsigned long) &smsc95xx_info,
2158 },
2159 {
2160 /* SMSC LAN89530 USB Ethernet Device */
2161 USB_DEVICE(0x0424, 0x9E08),
2162 .driver_info = (unsigned long) &smsc95xx_info,
2163 },
2164 {
2165 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */
2166 USB_DEVICE(0x0878, 0x1400),
2167 .driver_info = (unsigned long)&smsc95xx_info,
2168 },
2169 {
2170 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */
2171 USB_DEVICE(0x184F, 0x0051),
2172 .driver_info = (unsigned long)&smsc95xx_info,
2173 },
2174 { }, /* END */
2175 };
2176 MODULE_DEVICE_TABLE(usb, products);
2177
2178 static struct usb_driver smsc95xx_driver = {
2179 .name = "smsc95xx",
2180 .id_table = products,
2181 .probe = usbnet_probe,
2182 .suspend = smsc95xx_suspend,
2183 .resume = smsc95xx_resume,
2184 .reset_resume = smsc95xx_reset_resume,
2185 .disconnect = usbnet_disconnect,
2186 .disable_hub_initiated_lpm = 1,
2187 .supports_autosuspend = 1,
2188 };
2189
2190 module_usb_driver(smsc95xx_driver);
2191
2192 MODULE_AUTHOR("Nancy Lin");
2193 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2194 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2195 MODULE_LICENSE("GPL");
2196