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 SMSC_DRIVER_VERSION "2.0.0"
31 #define HS_USB_PKT_SIZE (512)
32 #define FS_USB_PKT_SIZE (64)
33 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
34 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
35 #define DEFAULT_BULK_IN_DELAY (0x00002000)
36 #define MAX_SINGLE_PACKET_SIZE (2048)
37 #define LAN95XX_EEPROM_MAGIC (0x9500)
38 #define EEPROM_MAC_OFFSET (0x01)
39 #define DEFAULT_TX_CSUM_ENABLE (true)
40 #define DEFAULT_RX_CSUM_ENABLE (true)
41 #define SMSC95XX_INTERNAL_PHY_ID (1)
42 #define SMSC95XX_TX_OVERHEAD (8)
43 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
44 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
45 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
46
47 #define FEATURE_8_WAKEUP_FILTERS (0x01)
48 #define FEATURE_PHY_NLP_CROSSOVER (0x02)
49 #define FEATURE_REMOTE_WAKEUP (0x04)
50
51 #define SUSPEND_SUSPEND0 (0x01)
52 #define SUSPEND_SUSPEND1 (0x02)
53 #define SUSPEND_SUSPEND2 (0x04)
54 #define SUSPEND_SUSPEND3 (0x08)
55 #define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
56 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
57
58 #define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */
59 #define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1)
60
61 struct smsc95xx_priv {
62 u32 mac_cr;
63 u32 hash_hi;
64 u32 hash_lo;
65 u32 wolopts;
66 bool pause_rx;
67 bool pause_tx;
68 bool pause_autoneg;
69 spinlock_t mac_cr_lock;
70 u8 features;
71 u8 suspend_flags;
72 bool is_internal_phy;
73 struct irq_chip irqchip;
74 struct irq_domain *irqdomain;
75 struct fwnode_handle *irqfwnode;
76 struct mii_bus *mdiobus;
77 struct phy_device *phydev;
78 struct task_struct *pm_task;
79 };
80
81 static bool turbo_mode = true;
82 module_param(turbo_mode, bool, 0644);
83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
84
smsc95xx_read_reg(struct usbnet * dev,u32 index,u32 * data)85 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
86 u32 *data)
87 {
88 struct smsc95xx_priv *pdata = dev->driver_priv;
89 u32 buf;
90 int ret;
91 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
92
93 if (current != pdata->pm_task)
94 fn = usbnet_read_cmd;
95 else
96 fn = usbnet_read_cmd_nopm;
97
98 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
99 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
100 0, index, &buf, 4);
101 if (ret < 4) {
102 ret = ret < 0 ? ret : -ENODATA;
103
104 if (ret != -ENODEV)
105 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
106 index, ret);
107 return ret;
108 }
109
110 le32_to_cpus(&buf);
111 *data = buf;
112
113 return ret;
114 }
115
smsc95xx_write_reg(struct usbnet * dev,u32 index,u32 data)116 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
117 u32 data)
118 {
119 struct smsc95xx_priv *pdata = dev->driver_priv;
120 u32 buf;
121 int ret;
122 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
123
124 if (current != pdata->pm_task)
125 fn = usbnet_write_cmd;
126 else
127 fn = usbnet_write_cmd_nopm;
128
129 buf = data;
130 cpu_to_le32s(&buf);
131
132 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
133 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
134 0, index, &buf, 4);
135 if (ret < 0 && ret != -ENODEV)
136 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
137 index, ret);
138
139 return ret;
140 }
141
142 /* Loop until the read is completed with timeout
143 * called with phy_mutex held */
smsc95xx_phy_wait_not_busy(struct usbnet * dev)144 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
145 {
146 unsigned long start_time = jiffies;
147 u32 val;
148 int ret;
149
150 do {
151 ret = smsc95xx_read_reg(dev, MII_ADDR, &val);
152 if (ret < 0) {
153 /* Ignore -ENODEV error during disconnect() */
154 if (ret == -ENODEV)
155 return 0;
156 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
157 return ret;
158 }
159
160 if (!(val & MII_BUSY_))
161 return 0;
162 } while (!time_after(jiffies, start_time + HZ));
163
164 return -EIO;
165 }
166
mii_address_cmd(int phy_id,int idx,u16 op)167 static u32 mii_address_cmd(int phy_id, int idx, u16 op)
168 {
169 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op;
170 }
171
smsc95xx_mdio_read(struct usbnet * dev,int phy_id,int idx)172 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx)
173 {
174 u32 val, addr;
175 int ret;
176
177 mutex_lock(&dev->phy_mutex);
178
179 /* confirm MII not busy */
180 ret = smsc95xx_phy_wait_not_busy(dev);
181 if (ret < 0) {
182 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
183 goto done;
184 }
185
186 /* set the address, index & direction (read from PHY) */
187 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_);
188 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
189 if (ret < 0) {
190 if (ret != -ENODEV)
191 netdev_warn(dev->net, "Error writing MII_ADDR\n");
192 goto done;
193 }
194
195 ret = smsc95xx_phy_wait_not_busy(dev);
196 if (ret < 0) {
197 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
198 goto done;
199 }
200
201 ret = smsc95xx_read_reg(dev, MII_DATA, &val);
202 if (ret < 0) {
203 if (ret != -ENODEV)
204 netdev_warn(dev->net, "Error reading MII_DATA\n");
205 goto done;
206 }
207
208 ret = (u16)(val & 0xFFFF);
209
210 done:
211 mutex_unlock(&dev->phy_mutex);
212
213 /* Ignore -ENODEV error during disconnect() */
214 if (ret == -ENODEV)
215 return 0;
216 return ret;
217 }
218
smsc95xx_mdio_write(struct usbnet * dev,int phy_id,int idx,int regval)219 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx,
220 int regval)
221 {
222 u32 val, addr;
223 int ret;
224
225 mutex_lock(&dev->phy_mutex);
226
227 /* confirm MII not busy */
228 ret = smsc95xx_phy_wait_not_busy(dev);
229 if (ret < 0) {
230 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
231 goto done;
232 }
233
234 val = regval;
235 ret = smsc95xx_write_reg(dev, MII_DATA, val);
236 if (ret < 0) {
237 if (ret != -ENODEV)
238 netdev_warn(dev->net, "Error writing MII_DATA\n");
239 goto done;
240 }
241
242 /* set the address, index & direction (write to PHY) */
243 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_);
244 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
245 if (ret < 0) {
246 if (ret != -ENODEV)
247 netdev_warn(dev->net, "Error writing MII_ADDR\n");
248 goto done;
249 }
250
251 ret = smsc95xx_phy_wait_not_busy(dev);
252 if (ret < 0) {
253 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
254 goto done;
255 }
256
257 done:
258 mutex_unlock(&dev->phy_mutex);
259 }
260
smsc95xx_mdiobus_reset(struct mii_bus * bus)261 static int smsc95xx_mdiobus_reset(struct mii_bus *bus)
262 {
263 struct smsc95xx_priv *pdata;
264 struct usbnet *dev;
265 u32 val;
266 int ret;
267
268 dev = bus->priv;
269 pdata = dev->driver_priv;
270
271 if (pdata->is_internal_phy)
272 return 0;
273
274 mutex_lock(&dev->phy_mutex);
275
276 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
277 if (ret < 0)
278 goto reset_out;
279
280 val |= PM_CTL_PHY_RST_;
281
282 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
283 if (ret < 0)
284 goto reset_out;
285
286 /* Driver has no knowledge at this point about the external PHY.
287 * The 802.3 specifies that the reset process shall
288 * be completed within 0.5 s.
289 */
290 fsleep(500000);
291
292 reset_out:
293 mutex_unlock(&dev->phy_mutex);
294
295 return 0;
296 }
297
smsc95xx_mdiobus_read(struct mii_bus * bus,int phy_id,int idx)298 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
299 {
300 struct usbnet *dev = bus->priv;
301
302 return smsc95xx_mdio_read(dev, phy_id, idx);
303 }
304
smsc95xx_mdiobus_write(struct mii_bus * bus,int phy_id,int idx,u16 regval)305 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
306 u16 regval)
307 {
308 struct usbnet *dev = bus->priv;
309
310 smsc95xx_mdio_write(dev, phy_id, idx, regval);
311 return 0;
312 }
313
smsc95xx_wait_eeprom(struct usbnet * dev)314 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
315 {
316 unsigned long start_time = jiffies;
317 u32 val;
318 int ret;
319
320 do {
321 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
322 if (ret < 0) {
323 netdev_warn(dev->net, "Error reading E2P_CMD\n");
324 return ret;
325 }
326
327 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
328 break;
329 udelay(40);
330 } while (!time_after(jiffies, start_time + HZ));
331
332 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
333 netdev_warn(dev->net, "EEPROM read operation timeout\n");
334 return -EIO;
335 }
336
337 return 0;
338 }
339
smsc95xx_eeprom_confirm_not_busy(struct usbnet * dev)340 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
341 {
342 unsigned long start_time = jiffies;
343 u32 val;
344 int ret;
345
346 do {
347 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
348 if (ret < 0) {
349 netdev_warn(dev->net, "Error reading E2P_CMD\n");
350 return ret;
351 }
352
353 if (!(val & E2P_CMD_BUSY_))
354 return 0;
355
356 udelay(40);
357 } while (!time_after(jiffies, start_time + HZ));
358
359 netdev_warn(dev->net, "EEPROM is busy\n");
360 return -EIO;
361 }
362
smsc95xx_read_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)363 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
364 u8 *data)
365 {
366 u32 val;
367 int i, ret;
368
369 BUG_ON(!dev);
370 BUG_ON(!data);
371
372 ret = smsc95xx_eeprom_confirm_not_busy(dev);
373 if (ret)
374 return ret;
375
376 for (i = 0; i < length; i++) {
377 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
378 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
379 if (ret < 0) {
380 netdev_warn(dev->net, "Error writing E2P_CMD\n");
381 return ret;
382 }
383
384 ret = smsc95xx_wait_eeprom(dev);
385 if (ret < 0)
386 return ret;
387
388 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
389 if (ret < 0) {
390 netdev_warn(dev->net, "Error reading E2P_DATA\n");
391 return ret;
392 }
393
394 data[i] = val & 0xFF;
395 offset++;
396 }
397
398 return 0;
399 }
400
smsc95xx_write_eeprom(struct usbnet * dev,u32 offset,u32 length,u8 * data)401 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
402 u8 *data)
403 {
404 u32 val;
405 int i, ret;
406
407 BUG_ON(!dev);
408 BUG_ON(!data);
409
410 ret = smsc95xx_eeprom_confirm_not_busy(dev);
411 if (ret)
412 return ret;
413
414 /* Issue write/erase enable command */
415 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
416 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
417 if (ret < 0) {
418 netdev_warn(dev->net, "Error writing E2P_DATA\n");
419 return ret;
420 }
421
422 ret = smsc95xx_wait_eeprom(dev);
423 if (ret < 0)
424 return ret;
425
426 for (i = 0; i < length; i++) {
427
428 /* Fill data register */
429 val = data[i];
430 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
431 if (ret < 0) {
432 netdev_warn(dev->net, "Error writing E2P_DATA\n");
433 return ret;
434 }
435
436 /* Send "write" command */
437 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
438 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
439 if (ret < 0) {
440 netdev_warn(dev->net, "Error writing E2P_CMD\n");
441 return ret;
442 }
443
444 ret = smsc95xx_wait_eeprom(dev);
445 if (ret < 0)
446 return ret;
447
448 offset++;
449 }
450
451 return 0;
452 }
453
smsc95xx_write_reg_async(struct usbnet * dev,u16 index,u32 data)454 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
455 u32 data)
456 {
457 const u16 size = 4;
458 u32 buf;
459 int ret;
460
461 buf = data;
462 cpu_to_le32s(&buf);
463
464 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
465 USB_DIR_OUT | USB_TYPE_VENDOR |
466 USB_RECIP_DEVICE,
467 0, index, &buf, size);
468 if (ret < 0)
469 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
470 ret);
471 return ret;
472 }
473
474 /* returns hash bit number for given MAC address
475 * example:
476 * 01 00 5E 00 00 01 -> returns bit number 31 */
smsc95xx_hash(char addr[ETH_ALEN])477 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
478 {
479 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
480 }
481
smsc95xx_set_multicast(struct net_device * netdev)482 static void smsc95xx_set_multicast(struct net_device *netdev)
483 {
484 struct usbnet *dev = netdev_priv(netdev);
485 struct smsc95xx_priv *pdata = dev->driver_priv;
486 unsigned long flags;
487 int ret;
488
489 pdata->hash_hi = 0;
490 pdata->hash_lo = 0;
491
492 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
493
494 if (dev->net->flags & IFF_PROMISC) {
495 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
496 pdata->mac_cr |= MAC_CR_PRMS_;
497 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
498 } else if (dev->net->flags & IFF_ALLMULTI) {
499 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
500 pdata->mac_cr |= MAC_CR_MCPAS_;
501 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
502 } else if (!netdev_mc_empty(dev->net)) {
503 struct netdev_hw_addr *ha;
504
505 pdata->mac_cr |= MAC_CR_HPFILT_;
506 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
507
508 netdev_for_each_mc_addr(ha, netdev) {
509 u32 bitnum = smsc95xx_hash(ha->addr);
510 u32 mask = 0x01 << (bitnum & 0x1F);
511 if (bitnum & 0x20)
512 pdata->hash_hi |= mask;
513 else
514 pdata->hash_lo |= mask;
515 }
516
517 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
518 pdata->hash_hi, pdata->hash_lo);
519 } else {
520 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
521 pdata->mac_cr &=
522 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
523 }
524
525 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
526
527 /* Initiate async writes, as we can't wait for completion here */
528 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
529 if (ret < 0)
530 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
531
532 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
533 if (ret < 0)
534 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
535
536 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
537 if (ret < 0)
538 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
539 }
540
smsc95xx_phy_update_flowcontrol(struct usbnet * dev)541 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev)
542 {
543 struct smsc95xx_priv *pdata = dev->driver_priv;
544 u32 flow = 0, afc_cfg;
545
546 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
547 if (ret < 0)
548 return ret;
549
550 if (pdata->phydev->duplex == DUPLEX_FULL) {
551 bool tx_pause, rx_pause;
552
553 if (pdata->phydev->autoneg == AUTONEG_ENABLE &&
554 pdata->pause_autoneg) {
555 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause);
556 } else {
557 tx_pause = pdata->pause_tx;
558 rx_pause = pdata->pause_rx;
559 }
560
561 if (rx_pause)
562 flow = 0xFFFF0002;
563
564 if (tx_pause) {
565 afc_cfg |= 0xF;
566 flow |= 0xFFFF0000;
567 } else {
568 afc_cfg &= ~0xF;
569 }
570
571 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
572 rx_pause ? "enabled" : "disabled",
573 tx_pause ? "enabled" : "disabled");
574 } else {
575 netif_dbg(dev, link, dev->net, "half duplex\n");
576 afc_cfg |= 0xF;
577 }
578
579 ret = smsc95xx_write_reg(dev, FLOW, flow);
580 if (ret < 0)
581 return ret;
582
583 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
584 }
585
smsc95xx_mac_update_fullduplex(struct usbnet * dev)586 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev)
587 {
588 struct smsc95xx_priv *pdata = dev->driver_priv;
589 unsigned long flags;
590 int ret;
591
592 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
593 if (pdata->phydev->duplex != DUPLEX_FULL) {
594 pdata->mac_cr &= ~MAC_CR_FDPX_;
595 pdata->mac_cr |= MAC_CR_RCVOWN_;
596 } else {
597 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
598 pdata->mac_cr |= MAC_CR_FDPX_;
599 }
600 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
601
602 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
603 if (ret < 0) {
604 if (ret != -ENODEV)
605 netdev_warn(dev->net,
606 "Error updating MAC full duplex mode\n");
607 return;
608 }
609
610 ret = smsc95xx_phy_update_flowcontrol(dev);
611 if (ret < 0)
612 netdev_warn(dev->net, "Error updating PHY flow control\n");
613 }
614
smsc95xx_status(struct usbnet * dev,struct urb * urb)615 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
616 {
617 struct smsc95xx_priv *pdata = dev->driver_priv;
618 unsigned long flags;
619 u32 intdata;
620
621 if (urb->actual_length != 4) {
622 netdev_warn(dev->net, "unexpected urb length %d\n",
623 urb->actual_length);
624 return;
625 }
626
627 intdata = get_unaligned_le32(urb->transfer_buffer);
628 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
629
630 local_irq_save(flags);
631
632 if (intdata & INT_ENP_PHY_INT_)
633 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ);
634 else
635 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
636 intdata);
637
638 local_irq_restore(flags);
639 }
640
641 /* Enable or disable Tx & Rx checksum offload engines */
smsc95xx_set_features(struct net_device * netdev,netdev_features_t features)642 static int smsc95xx_set_features(struct net_device *netdev,
643 netdev_features_t features)
644 {
645 struct usbnet *dev = netdev_priv(netdev);
646 u32 read_buf;
647 int ret;
648
649 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
650 if (ret < 0)
651 return ret;
652
653 if (features & NETIF_F_IP_CSUM)
654 read_buf |= Tx_COE_EN_;
655 else
656 read_buf &= ~Tx_COE_EN_;
657
658 if (features & NETIF_F_RXCSUM)
659 read_buf |= Rx_COE_EN_;
660 else
661 read_buf &= ~Rx_COE_EN_;
662
663 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
664 if (ret < 0)
665 return ret;
666
667 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
668 return 0;
669 }
670
smsc95xx_ethtool_get_eeprom_len(struct net_device * net)671 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
672 {
673 return MAX_EEPROM_SIZE;
674 }
675
smsc95xx_ethtool_get_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)676 static int smsc95xx_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 = LAN95XX_EEPROM_MAGIC;
682
683 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
684 }
685
smsc95xx_ethtool_set_eeprom(struct net_device * netdev,struct ethtool_eeprom * ee,u8 * data)686 static int smsc95xx_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 != LAN95XX_EEPROM_MAGIC) {
692 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
693 ee->magic);
694 return -EINVAL;
695 }
696
697 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
698 }
699
smsc95xx_ethtool_getregslen(struct net_device * netdev)700 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
701 {
702 /* all smsc95xx registers */
703 return COE_CR - ID_REV + sizeof(u32);
704 }
705
706 static void
smsc95xx_ethtool_getregs(struct net_device * netdev,struct ethtool_regs * regs,void * buf)707 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
708 void *buf)
709 {
710 struct usbnet *dev = netdev_priv(netdev);
711 unsigned int i, j;
712 int retval;
713 u32 *data = buf;
714
715 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version);
716 if (retval < 0) {
717 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
718 return;
719 }
720
721 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
722 retval = smsc95xx_read_reg(dev, i, &data[j]);
723 if (retval < 0) {
724 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
725 return;
726 }
727 }
728 }
729
smsc95xx_ethtool_get_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)730 static void smsc95xx_ethtool_get_wol(struct net_device *net,
731 struct ethtool_wolinfo *wolinfo)
732 {
733 struct usbnet *dev = netdev_priv(net);
734 struct smsc95xx_priv *pdata = dev->driver_priv;
735
736 wolinfo->supported = SUPPORTED_WAKE;
737 wolinfo->wolopts = pdata->wolopts;
738 }
739
smsc95xx_ethtool_set_wol(struct net_device * net,struct ethtool_wolinfo * wolinfo)740 static int smsc95xx_ethtool_set_wol(struct net_device *net,
741 struct ethtool_wolinfo *wolinfo)
742 {
743 struct usbnet *dev = netdev_priv(net);
744 struct smsc95xx_priv *pdata = dev->driver_priv;
745 int ret;
746
747 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
748 return -EINVAL;
749
750 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
751
752 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
753 if (ret < 0)
754 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
755
756 return ret;
757 }
758
smsc95xx_get_link(struct net_device * net)759 static u32 smsc95xx_get_link(struct net_device *net)
760 {
761 phy_read_status(net->phydev);
762 return net->phydev->link;
763 }
764
smsc95xx_ethtool_get_strings(struct net_device * netdev,u32 sset,u8 * data)765 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset,
766 u8 *data)
767 {
768 switch (sset) {
769 case ETH_SS_TEST:
770 net_selftest_get_strings(data);
771 break;
772 }
773 }
774
smsc95xx_ethtool_get_sset_count(struct net_device * ndev,int sset)775 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset)
776 {
777 switch (sset) {
778 case ETH_SS_TEST:
779 return net_selftest_get_count();
780 default:
781 return -EOPNOTSUPP;
782 }
783 }
784
smsc95xx_get_pauseparam(struct net_device * ndev,struct ethtool_pauseparam * pause)785 static void smsc95xx_get_pauseparam(struct net_device *ndev,
786 struct ethtool_pauseparam *pause)
787 {
788 struct smsc95xx_priv *pdata;
789 struct usbnet *dev;
790
791 dev = netdev_priv(ndev);
792 pdata = dev->driver_priv;
793
794 pause->autoneg = pdata->pause_autoneg;
795 pause->rx_pause = pdata->pause_rx;
796 pause->tx_pause = pdata->pause_tx;
797 }
798
smsc95xx_set_pauseparam(struct net_device * ndev,struct ethtool_pauseparam * pause)799 static int smsc95xx_set_pauseparam(struct net_device *ndev,
800 struct ethtool_pauseparam *pause)
801 {
802 bool pause_autoneg_rx, pause_autoneg_tx;
803 struct smsc95xx_priv *pdata;
804 struct phy_device *phydev;
805 struct usbnet *dev;
806
807 dev = netdev_priv(ndev);
808 pdata = dev->driver_priv;
809 phydev = ndev->phydev;
810
811 if (!phydev)
812 return -ENODEV;
813
814 pdata->pause_rx = pause->rx_pause;
815 pdata->pause_tx = pause->tx_pause;
816 pdata->pause_autoneg = pause->autoneg;
817
818 if (pause->autoneg) {
819 pause_autoneg_rx = pause->rx_pause;
820 pause_autoneg_tx = pause->tx_pause;
821 } else {
822 pause_autoneg_rx = false;
823 pause_autoneg_tx = false;
824 }
825
826 phy_set_asym_pause(ndev->phydev, pause_autoneg_rx, pause_autoneg_tx);
827 if (phydev->link && (!pause->autoneg ||
828 phydev->autoneg == AUTONEG_DISABLE))
829 smsc95xx_mac_update_fullduplex(dev);
830
831 return 0;
832 }
833
834 static const struct ethtool_ops smsc95xx_ethtool_ops = {
835 .get_link = smsc95xx_get_link,
836 .nway_reset = phy_ethtool_nway_reset,
837 .get_drvinfo = usbnet_get_drvinfo,
838 .get_msglevel = usbnet_get_msglevel,
839 .set_msglevel = usbnet_set_msglevel,
840 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
841 .get_eeprom = smsc95xx_ethtool_get_eeprom,
842 .set_eeprom = smsc95xx_ethtool_set_eeprom,
843 .get_regs_len = smsc95xx_ethtool_getregslen,
844 .get_regs = smsc95xx_ethtool_getregs,
845 .get_wol = smsc95xx_ethtool_get_wol,
846 .set_wol = smsc95xx_ethtool_set_wol,
847 .get_link_ksettings = phy_ethtool_get_link_ksettings,
848 .set_link_ksettings = phy_ethtool_set_link_ksettings,
849 .get_ts_info = ethtool_op_get_ts_info,
850 .self_test = net_selftest,
851 .get_strings = smsc95xx_ethtool_get_strings,
852 .get_sset_count = smsc95xx_ethtool_get_sset_count,
853 .get_pauseparam = smsc95xx_get_pauseparam,
854 .set_pauseparam = smsc95xx_set_pauseparam,
855 };
856
smsc95xx_ioctl(struct net_device * netdev,struct ifreq * rq,int cmd)857 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
858 {
859 if (!netif_running(netdev))
860 return -EINVAL;
861
862 return phy_mii_ioctl(netdev->phydev, rq, cmd);
863 }
864
smsc95xx_init_mac_address(struct usbnet * dev)865 static void smsc95xx_init_mac_address(struct usbnet *dev)
866 {
867 u8 addr[ETH_ALEN];
868
869 /* maybe the boot loader passed the MAC address in devicetree */
870 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
871 if (is_valid_ether_addr(dev->net->dev_addr)) {
872 /* device tree values are valid so use them */
873 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
874 return;
875 }
876 }
877
878 /* try reading mac address from EEPROM */
879 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
880 eth_hw_addr_set(dev->net, addr);
881 if (is_valid_ether_addr(dev->net->dev_addr)) {
882 /* eeprom values are valid so use them */
883 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
884 return;
885 }
886 }
887
888 /* no useful static MAC address found. generate a random one */
889 eth_hw_addr_random(dev->net);
890 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
891 }
892
smsc95xx_set_mac_address(struct usbnet * dev)893 static int smsc95xx_set_mac_address(struct usbnet *dev)
894 {
895 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
896 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
897 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
898 int ret;
899
900 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
901 if (ret < 0)
902 return ret;
903
904 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
905 }
906
907 /* starts the TX path */
smsc95xx_start_tx_path(struct usbnet * dev)908 static int smsc95xx_start_tx_path(struct usbnet *dev)
909 {
910 struct smsc95xx_priv *pdata = dev->driver_priv;
911 unsigned long flags;
912 int ret;
913
914 /* Enable Tx at MAC */
915 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
916 pdata->mac_cr |= MAC_CR_TXEN_;
917 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
918
919 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
920 if (ret < 0)
921 return ret;
922
923 /* Enable Tx at SCSRs */
924 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
925 }
926
927 /* Starts the Receive path */
smsc95xx_start_rx_path(struct usbnet * dev)928 static int smsc95xx_start_rx_path(struct usbnet *dev)
929 {
930 struct smsc95xx_priv *pdata = dev->driver_priv;
931 unsigned long flags;
932
933 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
934 pdata->mac_cr |= MAC_CR_RXEN_;
935 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
936
937 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
938 }
939
smsc95xx_reset(struct usbnet * dev)940 static int smsc95xx_reset(struct usbnet *dev)
941 {
942 struct smsc95xx_priv *pdata = dev->driver_priv;
943 u32 read_buf, burst_cap;
944 int ret = 0, timeout;
945
946 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
947
948 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
949 if (ret < 0)
950 return ret;
951
952 timeout = 0;
953 do {
954 msleep(10);
955 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
956 if (ret < 0)
957 return ret;
958 timeout++;
959 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
960
961 if (timeout >= 100) {
962 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
963 return -ETIMEDOUT;
964 }
965
966 ret = smsc95xx_set_mac_address(dev);
967 if (ret < 0)
968 return ret;
969
970 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
971 dev->net->dev_addr);
972
973 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
974 if (ret < 0)
975 return ret;
976
977 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
978 read_buf);
979
980 read_buf |= HW_CFG_BIR_;
981
982 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
983 if (ret < 0)
984 return ret;
985
986 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
987 if (ret < 0)
988 return ret;
989
990 netif_dbg(dev, ifup, dev->net,
991 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
992 read_buf);
993
994 if (!turbo_mode) {
995 burst_cap = 0;
996 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
997 } else if (dev->udev->speed == USB_SPEED_HIGH) {
998 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
999 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1000 } else {
1001 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1002 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1003 }
1004
1005 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1006 (ulong)dev->rx_urb_size);
1007
1008 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1009 if (ret < 0)
1010 return ret;
1011
1012 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1013 if (ret < 0)
1014 return ret;
1015
1016 netif_dbg(dev, ifup, dev->net,
1017 "Read Value from BURST_CAP after writing: 0x%08x\n",
1018 read_buf);
1019
1020 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1021 if (ret < 0)
1022 return ret;
1023
1024 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1025 if (ret < 0)
1026 return ret;
1027
1028 netif_dbg(dev, ifup, dev->net,
1029 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1030 read_buf);
1031
1032 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1033 if (ret < 0)
1034 return ret;
1035
1036 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1037 read_buf);
1038
1039 if (turbo_mode)
1040 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1041
1042 read_buf &= ~HW_CFG_RXDOFF_;
1043
1044 /* set Rx data offset=2, Make IP header aligns on word boundary. */
1045 read_buf |= NET_IP_ALIGN << 9;
1046
1047 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1048 if (ret < 0)
1049 return ret;
1050
1051 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1052 if (ret < 0)
1053 return ret;
1054
1055 netif_dbg(dev, ifup, dev->net,
1056 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1057
1058 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1059 if (ret < 0)
1060 return ret;
1061
1062 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1063 if (ret < 0)
1064 return ret;
1065 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1066
1067 ret = smsc95xx_read_reg(dev, LED_GPIO_CFG, &read_buf);
1068 if (ret < 0)
1069 return ret;
1070 /* Configure GPIO pins as LED outputs */
1071 read_buf |= LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1072 LED_GPIO_CFG_FDX_LED;
1073 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, read_buf);
1074 if (ret < 0)
1075 return ret;
1076
1077 /* Init Tx */
1078 ret = smsc95xx_write_reg(dev, FLOW, 0);
1079 if (ret < 0)
1080 return ret;
1081
1082 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1083 if (ret < 0)
1084 return ret;
1085
1086 /* Don't need mac_cr_lock during initialisation */
1087 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1088 if (ret < 0)
1089 return ret;
1090
1091 /* Init Rx */
1092 /* Set Vlan */
1093 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1094 if (ret < 0)
1095 return ret;
1096
1097 /* Enable or disable checksum offload engines */
1098 ret = smsc95xx_set_features(dev->net, dev->net->features);
1099 if (ret < 0) {
1100 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1101 return ret;
1102 }
1103
1104 smsc95xx_set_multicast(dev->net);
1105
1106 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1107 if (ret < 0)
1108 return ret;
1109
1110 /* enable PHY interrupts */
1111 read_buf |= INT_EP_CTL_PHY_INT_;
1112
1113 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1114 if (ret < 0)
1115 return ret;
1116
1117 ret = smsc95xx_start_tx_path(dev);
1118 if (ret < 0) {
1119 netdev_warn(dev->net, "Failed to start TX path\n");
1120 return ret;
1121 }
1122
1123 ret = smsc95xx_start_rx_path(dev);
1124 if (ret < 0) {
1125 netdev_warn(dev->net, "Failed to start RX path\n");
1126 return ret;
1127 }
1128
1129 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1130 return 0;
1131 }
1132
1133 static const struct net_device_ops smsc95xx_netdev_ops = {
1134 .ndo_open = usbnet_open,
1135 .ndo_stop = usbnet_stop,
1136 .ndo_start_xmit = usbnet_start_xmit,
1137 .ndo_tx_timeout = usbnet_tx_timeout,
1138 .ndo_change_mtu = usbnet_change_mtu,
1139 .ndo_get_stats64 = dev_get_tstats64,
1140 .ndo_set_mac_address = eth_mac_addr,
1141 .ndo_validate_addr = eth_validate_addr,
1142 .ndo_eth_ioctl = smsc95xx_ioctl,
1143 .ndo_set_rx_mode = smsc95xx_set_multicast,
1144 .ndo_set_features = smsc95xx_set_features,
1145 };
1146
smsc95xx_handle_link_change(struct net_device * net)1147 static void smsc95xx_handle_link_change(struct net_device *net)
1148 {
1149 struct usbnet *dev = netdev_priv(net);
1150
1151 phy_print_status(net->phydev);
1152 smsc95xx_mac_update_fullduplex(dev);
1153 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
1154 }
1155
smsc95xx_bind(struct usbnet * dev,struct usb_interface * intf)1156 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1157 {
1158 struct smsc95xx_priv *pdata;
1159 char usb_path[64];
1160 int ret, phy_irq;
1161 u32 val;
1162
1163 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1164
1165 ret = usbnet_get_endpoints(dev, intf);
1166 if (ret < 0) {
1167 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1168 return ret;
1169 }
1170
1171 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
1172 if (!pdata)
1173 return -ENOMEM;
1174
1175 dev->driver_priv = pdata;
1176
1177 spin_lock_init(&pdata->mac_cr_lock);
1178
1179 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1180 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1181 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1182 * it is transmitted as all ones. The zero transmitted checksum means
1183 * transmitter generated no checksum. Hence, enable csum offload only
1184 * for ipv4 packets.
1185 */
1186 if (DEFAULT_TX_CSUM_ENABLE)
1187 dev->net->features |= NETIF_F_IP_CSUM;
1188 if (DEFAULT_RX_CSUM_ENABLE)
1189 dev->net->features |= NETIF_F_RXCSUM;
1190
1191 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1192 set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1193
1194 smsc95xx_init_mac_address(dev);
1195
1196 /* Init all registers */
1197 ret = smsc95xx_reset(dev);
1198 if (ret)
1199 goto free_pdata;
1200
1201 /* create irq domain for use by PHY driver and GPIO consumers */
1202 usb_make_path(dev->udev, usb_path, sizeof(usb_path));
1203 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path);
1204 if (!pdata->irqfwnode) {
1205 ret = -ENOMEM;
1206 goto free_pdata;
1207 }
1208
1209 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode,
1210 SMSC95XX_NR_IRQS,
1211 &irq_domain_simple_ops,
1212 pdata);
1213 if (!pdata->irqdomain) {
1214 ret = -ENOMEM;
1215 goto free_irqfwnode;
1216 }
1217
1218 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ);
1219 if (!phy_irq) {
1220 ret = -ENOENT;
1221 goto remove_irqdomain;
1222 }
1223
1224 pdata->irqchip = dummy_irq_chip;
1225 pdata->irqchip.name = SMSC_CHIPNAME;
1226 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip,
1227 handle_simple_irq, "phy");
1228
1229 pdata->mdiobus = mdiobus_alloc();
1230 if (!pdata->mdiobus) {
1231 ret = -ENOMEM;
1232 goto dispose_irq;
1233 }
1234
1235 ret = smsc95xx_read_reg(dev, HW_CFG, &val);
1236 if (ret < 0)
1237 goto free_mdio;
1238
1239 pdata->is_internal_phy = !(val & HW_CFG_PSEL_);
1240 if (pdata->is_internal_phy)
1241 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);
1242
1243 pdata->mdiobus->priv = dev;
1244 pdata->mdiobus->read = smsc95xx_mdiobus_read;
1245 pdata->mdiobus->write = smsc95xx_mdiobus_write;
1246 pdata->mdiobus->reset = smsc95xx_mdiobus_reset;
1247 pdata->mdiobus->name = "smsc95xx-mdiobus";
1248 pdata->mdiobus->parent = &dev->udev->dev;
1249
1250 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id),
1251 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);
1252
1253 ret = mdiobus_register(pdata->mdiobus);
1254 if (ret) {
1255 netdev_err(dev->net, "Could not register MDIO bus\n");
1256 goto free_mdio;
1257 }
1258
1259 pdata->phydev = phy_find_first(pdata->mdiobus);
1260 if (!pdata->phydev) {
1261 netdev_err(dev->net, "no PHY found\n");
1262 ret = -ENODEV;
1263 goto unregister_mdio;
1264 }
1265
1266 pdata->phydev->irq = phy_irq;
1267 pdata->phydev->is_internal = pdata->is_internal_phy;
1268
1269 /* detect device revision as different features may be available */
1270 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1271 if (ret < 0)
1272 goto unregister_mdio;
1273
1274 val >>= 16;
1275 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1276 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1277 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1278 FEATURE_PHY_NLP_CROSSOVER |
1279 FEATURE_REMOTE_WAKEUP);
1280 else if (val == ID_REV_CHIP_ID_9512_)
1281 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1282
1283 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1284 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1285 dev->net->flags |= IFF_MULTICAST;
1286 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1287 dev->net->min_mtu = ETH_MIN_MTU;
1288 dev->net->max_mtu = ETH_DATA_LEN;
1289 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1290
1291 pdata->pause_tx = true;
1292 pdata->pause_rx = true;
1293 pdata->pause_autoneg = true;
1294 phy_support_asym_pause(pdata->phydev);
1295
1296 ret = phy_connect_direct(dev->net, pdata->phydev,
1297 &smsc95xx_handle_link_change,
1298 PHY_INTERFACE_MODE_MII);
1299 if (ret) {
1300 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id);
1301 goto unregister_mdio;
1302 }
1303
1304 phy_attached_info(dev->net->phydev);
1305
1306 return 0;
1307
1308 unregister_mdio:
1309 mdiobus_unregister(pdata->mdiobus);
1310
1311 free_mdio:
1312 mdiobus_free(pdata->mdiobus);
1313
1314 dispose_irq:
1315 irq_dispose_mapping(phy_irq);
1316
1317 remove_irqdomain:
1318 irq_domain_remove(pdata->irqdomain);
1319
1320 free_irqfwnode:
1321 irq_domain_free_fwnode(pdata->irqfwnode);
1322
1323 free_pdata:
1324 kfree(pdata);
1325 return ret;
1326 }
1327
smsc95xx_unbind(struct usbnet * dev,struct usb_interface * intf)1328 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1329 {
1330 struct smsc95xx_priv *pdata = dev->driver_priv;
1331
1332 phy_disconnect(dev->net->phydev);
1333 mdiobus_unregister(pdata->mdiobus);
1334 mdiobus_free(pdata->mdiobus);
1335 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ));
1336 irq_domain_remove(pdata->irqdomain);
1337 irq_domain_free_fwnode(pdata->irqfwnode);
1338 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1339 kfree(pdata);
1340 }
1341
smsc95xx_start_phy(struct usbnet * dev)1342 static int smsc95xx_start_phy(struct usbnet *dev)
1343 {
1344 phy_start(dev->net->phydev);
1345
1346 return 0;
1347 }
1348
smsc95xx_stop(struct usbnet * dev)1349 static int smsc95xx_stop(struct usbnet *dev)
1350 {
1351 phy_stop(dev->net->phydev);
1352
1353 return 0;
1354 }
1355
smsc_crc(const u8 * buffer,size_t len,int filter)1356 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1357 {
1358 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1359 return crc << ((filter % 2) * 16);
1360 }
1361
smsc95xx_link_ok(struct usbnet * dev)1362 static int smsc95xx_link_ok(struct usbnet *dev)
1363 {
1364 struct smsc95xx_priv *pdata = dev->driver_priv;
1365 int ret;
1366
1367 /* first, a dummy read, needed to latch some MII phys */
1368 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1369 if (ret < 0)
1370 return ret;
1371
1372 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1373 if (ret < 0)
1374 return ret;
1375
1376 return !!(ret & BMSR_LSTATUS);
1377 }
1378
smsc95xx_enter_suspend0(struct usbnet * dev)1379 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1380 {
1381 struct smsc95xx_priv *pdata = dev->driver_priv;
1382 u32 val;
1383 int ret;
1384
1385 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1386 if (ret < 0)
1387 return ret;
1388
1389 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1390 val |= PM_CTL_SUS_MODE_0;
1391
1392 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1393 if (ret < 0)
1394 return ret;
1395
1396 /* clear wol status */
1397 val &= ~PM_CTL_WUPS_;
1398 val |= PM_CTL_WUPS_WOL_;
1399
1400 /* enable energy detection */
1401 if (pdata->wolopts & WAKE_PHY)
1402 val |= PM_CTL_WUPS_ED_;
1403
1404 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1405 if (ret < 0)
1406 return ret;
1407
1408 /* read back PM_CTRL */
1409 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1410 if (ret < 0)
1411 return ret;
1412
1413 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1414
1415 return 0;
1416 }
1417
smsc95xx_enter_suspend1(struct usbnet * dev)1418 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1419 {
1420 struct smsc95xx_priv *pdata = dev->driver_priv;
1421 int ret, phy_id = pdata->phydev->mdio.addr;
1422 u32 val;
1423
1424 /* reconfigure link pulse detection timing for
1425 * compatibility with non-standard link partners
1426 */
1427 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1428 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG,
1429 PHY_EDPD_CONFIG_DEFAULT);
1430
1431 /* enable energy detect power-down mode */
1432 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS);
1433 if (ret < 0)
1434 return ret;
1435
1436 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1437
1438 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret);
1439
1440 /* enter SUSPEND1 mode */
1441 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1442 if (ret < 0)
1443 return ret;
1444
1445 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1446 val |= PM_CTL_SUS_MODE_1;
1447
1448 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1449 if (ret < 0)
1450 return ret;
1451
1452 /* clear wol status, enable energy detection */
1453 val &= ~PM_CTL_WUPS_;
1454 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1455
1456 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1457 if (ret < 0)
1458 return ret;
1459
1460 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1461
1462 return 0;
1463 }
1464
smsc95xx_enter_suspend2(struct usbnet * dev)1465 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1466 {
1467 struct smsc95xx_priv *pdata = dev->driver_priv;
1468 u32 val;
1469 int ret;
1470
1471 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1472 if (ret < 0)
1473 return ret;
1474
1475 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1476 val |= PM_CTL_SUS_MODE_2;
1477
1478 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1479 if (ret < 0)
1480 return ret;
1481
1482 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1483
1484 return 0;
1485 }
1486
smsc95xx_enter_suspend3(struct usbnet * dev)1487 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1488 {
1489 struct smsc95xx_priv *pdata = dev->driver_priv;
1490 u32 val;
1491 int ret;
1492
1493 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val);
1494 if (ret < 0)
1495 return ret;
1496
1497 if (val & RX_FIFO_INF_USED_) {
1498 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1499 return -EBUSY;
1500 }
1501
1502 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1503 if (ret < 0)
1504 return ret;
1505
1506 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1507 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1508
1509 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1510 if (ret < 0)
1511 return ret;
1512
1513 /* clear wol status */
1514 val &= ~PM_CTL_WUPS_;
1515 val |= PM_CTL_WUPS_WOL_;
1516
1517 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1518 if (ret < 0)
1519 return ret;
1520
1521 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1522
1523 return 0;
1524 }
1525
smsc95xx_autosuspend(struct usbnet * dev,u32 link_up)1526 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1527 {
1528 struct smsc95xx_priv *pdata = dev->driver_priv;
1529
1530 if (!netif_running(dev->net)) {
1531 /* interface is ifconfig down so fully power down hw */
1532 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1533 return smsc95xx_enter_suspend2(dev);
1534 }
1535
1536 if (!link_up) {
1537 /* link is down so enter EDPD mode, but only if device can
1538 * reliably resume from it. This check should be redundant
1539 * as current FEATURE_REMOTE_WAKEUP parts also support
1540 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1541 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1542 netdev_warn(dev->net, "EDPD not supported\n");
1543 return -EBUSY;
1544 }
1545
1546 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1547 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1548 return smsc95xx_enter_suspend1(dev);
1549 }
1550
1551 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1552 return smsc95xx_enter_suspend3(dev);
1553 }
1554
smsc95xx_suspend(struct usb_interface * intf,pm_message_t message)1555 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1556 {
1557 struct usbnet *dev = usb_get_intfdata(intf);
1558 struct smsc95xx_priv *pdata = dev->driver_priv;
1559 u32 val, link_up;
1560 int ret;
1561
1562 pdata->pm_task = current;
1563
1564 ret = usbnet_suspend(intf, message);
1565 if (ret < 0) {
1566 netdev_warn(dev->net, "usbnet_suspend error\n");
1567 pdata->pm_task = NULL;
1568 return ret;
1569 }
1570
1571 if (pdata->suspend_flags) {
1572 netdev_warn(dev->net, "error during last resume\n");
1573 pdata->suspend_flags = 0;
1574 }
1575
1576 link_up = smsc95xx_link_ok(dev);
1577
1578 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1579 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1580 ret = smsc95xx_autosuspend(dev, link_up);
1581 goto done;
1582 }
1583
1584 /* if we get this far we're not autosuspending */
1585 /* if no wol options set, or if link is down and we're not waking on
1586 * PHY activity, enter lowest power SUSPEND2 mode
1587 */
1588 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1589 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1590 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1591
1592 /* disable energy detect (link up) & wake up events */
1593 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1594 if (ret < 0)
1595 goto done;
1596
1597 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1598
1599 ret = smsc95xx_write_reg(dev, WUCSR, val);
1600 if (ret < 0)
1601 goto done;
1602
1603 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1604 if (ret < 0)
1605 goto done;
1606
1607 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1608
1609 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1610 if (ret < 0)
1611 goto done;
1612
1613 ret = smsc95xx_enter_suspend2(dev);
1614 goto done;
1615 }
1616
1617 if (pdata->wolopts & WAKE_PHY) {
1618 /* if link is down then configure EDPD and enter SUSPEND1,
1619 * otherwise enter SUSPEND0 below
1620 */
1621 if (!link_up) {
1622 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1623 ret = smsc95xx_enter_suspend1(dev);
1624 goto done;
1625 }
1626 }
1627
1628 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1629 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1630 u32 command[2];
1631 u32 offset[2];
1632 u32 crc[4];
1633 int wuff_filter_count =
1634 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1635 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1636 int i, filter = 0;
1637
1638 if (!filter_mask) {
1639 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1640 ret = -ENOMEM;
1641 goto done;
1642 }
1643
1644 memset(command, 0, sizeof(command));
1645 memset(offset, 0, sizeof(offset));
1646 memset(crc, 0, sizeof(crc));
1647
1648 if (pdata->wolopts & WAKE_BCAST) {
1649 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1650 netdev_info(dev->net, "enabling broadcast detection\n");
1651 filter_mask[filter * 4] = 0x003F;
1652 filter_mask[filter * 4 + 1] = 0x00;
1653 filter_mask[filter * 4 + 2] = 0x00;
1654 filter_mask[filter * 4 + 3] = 0x00;
1655 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1656 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1657 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1658 filter++;
1659 }
1660
1661 if (pdata->wolopts & WAKE_MCAST) {
1662 const u8 mcast[] = {0x01, 0x00, 0x5E};
1663 netdev_info(dev->net, "enabling multicast detection\n");
1664 filter_mask[filter * 4] = 0x0007;
1665 filter_mask[filter * 4 + 1] = 0x00;
1666 filter_mask[filter * 4 + 2] = 0x00;
1667 filter_mask[filter * 4 + 3] = 0x00;
1668 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1669 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1670 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1671 filter++;
1672 }
1673
1674 if (pdata->wolopts & WAKE_ARP) {
1675 const u8 arp[] = {0x08, 0x06};
1676 netdev_info(dev->net, "enabling ARP detection\n");
1677 filter_mask[filter * 4] = 0x0003;
1678 filter_mask[filter * 4 + 1] = 0x00;
1679 filter_mask[filter * 4 + 2] = 0x00;
1680 filter_mask[filter * 4 + 3] = 0x00;
1681 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1682 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1683 crc[filter/2] |= smsc_crc(arp, 2, filter);
1684 filter++;
1685 }
1686
1687 if (pdata->wolopts & WAKE_UCAST) {
1688 netdev_info(dev->net, "enabling unicast detection\n");
1689 filter_mask[filter * 4] = 0x003F;
1690 filter_mask[filter * 4 + 1] = 0x00;
1691 filter_mask[filter * 4 + 2] = 0x00;
1692 filter_mask[filter * 4 + 3] = 0x00;
1693 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1694 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1695 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1696 filter++;
1697 }
1698
1699 for (i = 0; i < (wuff_filter_count * 4); i++) {
1700 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]);
1701 if (ret < 0) {
1702 kfree(filter_mask);
1703 goto done;
1704 }
1705 }
1706 kfree(filter_mask);
1707
1708 for (i = 0; i < (wuff_filter_count / 4); i++) {
1709 ret = smsc95xx_write_reg(dev, WUFF, command[i]);
1710 if (ret < 0)
1711 goto done;
1712 }
1713
1714 for (i = 0; i < (wuff_filter_count / 4); i++) {
1715 ret = smsc95xx_write_reg(dev, WUFF, offset[i]);
1716 if (ret < 0)
1717 goto done;
1718 }
1719
1720 for (i = 0; i < (wuff_filter_count / 2); i++) {
1721 ret = smsc95xx_write_reg(dev, WUFF, crc[i]);
1722 if (ret < 0)
1723 goto done;
1724 }
1725
1726 /* clear any pending pattern match packet status */
1727 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1728 if (ret < 0)
1729 goto done;
1730
1731 val |= WUCSR_WUFR_;
1732
1733 ret = smsc95xx_write_reg(dev, WUCSR, val);
1734 if (ret < 0)
1735 goto done;
1736 }
1737
1738 if (pdata->wolopts & WAKE_MAGIC) {
1739 /* clear any pending magic packet status */
1740 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1741 if (ret < 0)
1742 goto done;
1743
1744 val |= WUCSR_MPR_;
1745
1746 ret = smsc95xx_write_reg(dev, WUCSR, val);
1747 if (ret < 0)
1748 goto done;
1749 }
1750
1751 /* enable/disable wakeup sources */
1752 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1753 if (ret < 0)
1754 goto done;
1755
1756 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1757 netdev_info(dev->net, "enabling pattern match wakeup\n");
1758 val |= WUCSR_WAKE_EN_;
1759 } else {
1760 netdev_info(dev->net, "disabling pattern match wakeup\n");
1761 val &= ~WUCSR_WAKE_EN_;
1762 }
1763
1764 if (pdata->wolopts & WAKE_MAGIC) {
1765 netdev_info(dev->net, "enabling magic packet wakeup\n");
1766 val |= WUCSR_MPEN_;
1767 } else {
1768 netdev_info(dev->net, "disabling magic packet wakeup\n");
1769 val &= ~WUCSR_MPEN_;
1770 }
1771
1772 ret = smsc95xx_write_reg(dev, WUCSR, val);
1773 if (ret < 0)
1774 goto done;
1775
1776 /* enable wol wakeup source */
1777 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1778 if (ret < 0)
1779 goto done;
1780
1781 val |= PM_CTL_WOL_EN_;
1782
1783 /* phy energy detect wakeup source */
1784 if (pdata->wolopts & WAKE_PHY)
1785 val |= PM_CTL_ED_EN_;
1786
1787 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1788 if (ret < 0)
1789 goto done;
1790
1791 /* enable receiver to enable frame reception */
1792 smsc95xx_start_rx_path(dev);
1793
1794 /* some wol options are enabled, so enter SUSPEND0 */
1795 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1796 ret = smsc95xx_enter_suspend0(dev);
1797
1798 done:
1799 /*
1800 * TODO: resume() might need to handle the suspend failure
1801 * in system sleep
1802 */
1803 if (ret && PMSG_IS_AUTO(message))
1804 usbnet_resume(intf);
1805
1806 pdata->pm_task = NULL;
1807 return ret;
1808 }
1809
smsc95xx_resume(struct usb_interface * intf)1810 static int smsc95xx_resume(struct usb_interface *intf)
1811 {
1812 struct usbnet *dev = usb_get_intfdata(intf);
1813 struct smsc95xx_priv *pdata;
1814 u8 suspend_flags;
1815 int ret;
1816 u32 val;
1817
1818 BUG_ON(!dev);
1819 pdata = dev->driver_priv;
1820 suspend_flags = pdata->suspend_flags;
1821
1822 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1823
1824 /* do this first to ensure it's cleared even in error case */
1825 pdata->suspend_flags = 0;
1826
1827 pdata->pm_task = current;
1828
1829 if (suspend_flags & SUSPEND_ALLMODES) {
1830 /* clear wake-up sources */
1831 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1832 if (ret < 0)
1833 goto done;
1834
1835 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1836
1837 ret = smsc95xx_write_reg(dev, WUCSR, val);
1838 if (ret < 0)
1839 goto done;
1840
1841 /* clear wake-up status */
1842 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1843 if (ret < 0)
1844 goto done;
1845
1846 val &= ~PM_CTL_WOL_EN_;
1847 val |= PM_CTL_WUPS_;
1848
1849 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1850 if (ret < 0)
1851 goto done;
1852 }
1853
1854 phy_init_hw(pdata->phydev);
1855
1856 ret = usbnet_resume(intf);
1857 if (ret < 0)
1858 netdev_warn(dev->net, "usbnet_resume error\n");
1859
1860 done:
1861 pdata->pm_task = NULL;
1862 return ret;
1863 }
1864
smsc95xx_reset_resume(struct usb_interface * intf)1865 static int smsc95xx_reset_resume(struct usb_interface *intf)
1866 {
1867 struct usbnet *dev = usb_get_intfdata(intf);
1868 struct smsc95xx_priv *pdata = dev->driver_priv;
1869 int ret;
1870
1871 pdata->pm_task = current;
1872 ret = smsc95xx_reset(dev);
1873 pdata->pm_task = NULL;
1874 if (ret < 0)
1875 return ret;
1876
1877 return smsc95xx_resume(intf);
1878 }
1879
smsc95xx_rx_csum_offload(struct sk_buff * skb)1880 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1881 {
1882 u16 *csum_ptr = (u16 *)(skb_tail_pointer(skb) - 2);
1883
1884 skb->csum = (__force __wsum)get_unaligned(csum_ptr);
1885 skb->ip_summed = CHECKSUM_COMPLETE;
1886 skb_trim(skb, skb->len - 2); /* remove csum */
1887 }
1888
smsc95xx_rx_fixup(struct usbnet * dev,struct sk_buff * skb)1889 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1890 {
1891 /* This check is no longer done by usbnet */
1892 if (skb->len < dev->net->hard_header_len)
1893 return 0;
1894
1895 while (skb->len > 0) {
1896 u32 header, align_count;
1897 struct sk_buff *ax_skb;
1898 unsigned char *packet;
1899 u16 size;
1900
1901 header = get_unaligned_le32(skb->data);
1902 skb_pull(skb, 4 + NET_IP_ALIGN);
1903 packet = skb->data;
1904
1905 /* get the packet length */
1906 size = (u16)((header & RX_STS_FL_) >> 16);
1907 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1908
1909 if (unlikely(size > skb->len)) {
1910 netif_dbg(dev, rx_err, dev->net,
1911 "size err header=0x%08x\n", header);
1912 return 0;
1913 }
1914
1915 if (unlikely(header & RX_STS_ES_)) {
1916 netif_dbg(dev, rx_err, dev->net,
1917 "Error header=0x%08x\n", header);
1918 dev->net->stats.rx_errors++;
1919 dev->net->stats.rx_dropped++;
1920
1921 if (header & RX_STS_CRC_) {
1922 dev->net->stats.rx_crc_errors++;
1923 } else {
1924 if (header & (RX_STS_TL_ | RX_STS_RF_))
1925 dev->net->stats.rx_frame_errors++;
1926
1927 if ((header & RX_STS_LE_) &&
1928 (!(header & RX_STS_FT_)))
1929 dev->net->stats.rx_length_errors++;
1930 }
1931 } else {
1932 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1933 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1934 netif_dbg(dev, rx_err, dev->net,
1935 "size err header=0x%08x\n", header);
1936 return 0;
1937 }
1938
1939 /* last frame in this batch */
1940 if (skb->len == size) {
1941 if (dev->net->features & NETIF_F_RXCSUM)
1942 smsc95xx_rx_csum_offload(skb);
1943 skb_trim(skb, skb->len - 4); /* remove fcs */
1944
1945 return 1;
1946 }
1947
1948 ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
1949 if (unlikely(!ax_skb)) {
1950 netdev_warn(dev->net, "Error allocating skb\n");
1951 return 0;
1952 }
1953
1954 skb_put(ax_skb, size);
1955 memcpy(ax_skb->data, packet, size);
1956
1957 if (dev->net->features & NETIF_F_RXCSUM)
1958 smsc95xx_rx_csum_offload(ax_skb);
1959 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1960
1961 usbnet_skb_return(dev, ax_skb);
1962 }
1963
1964 skb_pull(skb, size);
1965
1966 /* padding bytes before the next frame starts */
1967 if (skb->len)
1968 skb_pull(skb, align_count);
1969 }
1970
1971 return 1;
1972 }
1973
smsc95xx_calc_csum_preamble(struct sk_buff * skb)1974 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1975 {
1976 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1977 u16 high_16 = low_16 + skb->csum_offset;
1978 return (high_16 << 16) | low_16;
1979 }
1980
1981 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
1982 * transmission. This is fairly unlikely, only seems to trigger with some
1983 * short TCP ACK packets sent.
1984 *
1985 * Note, this calculation should probably check for the alignment of the
1986 * data as well, but a straight check for csum being in the last four bytes
1987 * of the packet should be ok for now.
1988 */
smsc95xx_can_tx_checksum(struct sk_buff * skb)1989 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
1990 {
1991 unsigned int len = skb->len - skb_checksum_start_offset(skb);
1992
1993 if (skb->len <= 45)
1994 return false;
1995 return skb->csum_offset < (len - (4 + 1));
1996 }
1997
smsc95xx_tx_fixup(struct usbnet * dev,struct sk_buff * skb,gfp_t flags)1998 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1999 struct sk_buff *skb, gfp_t flags)
2000 {
2001 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2002 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2003 u32 tx_cmd_a, tx_cmd_b;
2004 void *ptr;
2005
2006 /* We do not advertise SG, so skbs should be already linearized */
2007 BUG_ON(skb_shinfo(skb)->nr_frags);
2008
2009 /* Make writable and expand header space by overhead if required */
2010 if (skb_cow_head(skb, overhead)) {
2011 /* Must deallocate here as returning NULL to indicate error
2012 * means the skb won't be deallocated in the caller.
2013 */
2014 dev_kfree_skb_any(skb);
2015 return NULL;
2016 }
2017
2018 tx_cmd_b = (u32)skb->len;
2019 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
2020
2021 if (csum) {
2022 if (!smsc95xx_can_tx_checksum(skb)) {
2023 /* workaround - hardware tx checksum does not work
2024 * properly with extremely small packets */
2025 long csstart = skb_checksum_start_offset(skb);
2026 __wsum calc = csum_partial(skb->data + csstart,
2027 skb->len - csstart, 0);
2028 *((__sum16 *)(skb->data + csstart
2029 + skb->csum_offset)) = csum_fold(calc);
2030
2031 csum = false;
2032 } else {
2033 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2034 ptr = skb_push(skb, 4);
2035 put_unaligned_le32(csum_preamble, ptr);
2036
2037 tx_cmd_a += 4;
2038 tx_cmd_b += 4;
2039 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2040 }
2041 }
2042
2043 ptr = skb_push(skb, 8);
2044 put_unaligned_le32(tx_cmd_a, ptr);
2045 put_unaligned_le32(tx_cmd_b, ptr+4);
2046
2047 return skb;
2048 }
2049
smsc95xx_manage_power(struct usbnet * dev,int on)2050 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2051 {
2052 struct smsc95xx_priv *pdata = dev->driver_priv;
2053
2054 dev->intf->needs_remote_wakeup = on;
2055
2056 if (pdata->features & FEATURE_REMOTE_WAKEUP)
2057 return 0;
2058
2059 /* this chip revision isn't capable of remote wakeup */
2060 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2061
2062 if (on)
2063 usb_autopm_get_interface_no_resume(dev->intf);
2064 else
2065 usb_autopm_put_interface(dev->intf);
2066
2067 return 0;
2068 }
2069
2070 static const struct driver_info smsc95xx_info = {
2071 .description = "smsc95xx USB 2.0 Ethernet",
2072 .bind = smsc95xx_bind,
2073 .unbind = smsc95xx_unbind,
2074 .reset = smsc95xx_reset,
2075 .check_connect = smsc95xx_start_phy,
2076 .stop = smsc95xx_stop,
2077 .rx_fixup = smsc95xx_rx_fixup,
2078 .tx_fixup = smsc95xx_tx_fixup,
2079 .status = smsc95xx_status,
2080 .manage_power = smsc95xx_manage_power,
2081 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2082 };
2083
2084 static const struct usb_device_id products[] = {
2085 {
2086 /* SMSC9500 USB Ethernet Device */
2087 USB_DEVICE(0x0424, 0x9500),
2088 .driver_info = (unsigned long) &smsc95xx_info,
2089 },
2090 {
2091 /* SMSC9505 USB Ethernet Device */
2092 USB_DEVICE(0x0424, 0x9505),
2093 .driver_info = (unsigned long) &smsc95xx_info,
2094 },
2095 {
2096 /* SMSC9500A USB Ethernet Device */
2097 USB_DEVICE(0x0424, 0x9E00),
2098 .driver_info = (unsigned long) &smsc95xx_info,
2099 },
2100 {
2101 /* SMSC9505A USB Ethernet Device */
2102 USB_DEVICE(0x0424, 0x9E01),
2103 .driver_info = (unsigned long) &smsc95xx_info,
2104 },
2105 {
2106 /* SMSC9512/9514 USB Hub & Ethernet Device */
2107 USB_DEVICE(0x0424, 0xec00),
2108 .driver_info = (unsigned long) &smsc95xx_info,
2109 },
2110 {
2111 /* SMSC9500 USB Ethernet Device (SAL10) */
2112 USB_DEVICE(0x0424, 0x9900),
2113 .driver_info = (unsigned long) &smsc95xx_info,
2114 },
2115 {
2116 /* SMSC9505 USB Ethernet Device (SAL10) */
2117 USB_DEVICE(0x0424, 0x9901),
2118 .driver_info = (unsigned long) &smsc95xx_info,
2119 },
2120 {
2121 /* SMSC9500A USB Ethernet Device (SAL10) */
2122 USB_DEVICE(0x0424, 0x9902),
2123 .driver_info = (unsigned long) &smsc95xx_info,
2124 },
2125 {
2126 /* SMSC9505A USB Ethernet Device (SAL10) */
2127 USB_DEVICE(0x0424, 0x9903),
2128 .driver_info = (unsigned long) &smsc95xx_info,
2129 },
2130 {
2131 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2132 USB_DEVICE(0x0424, 0x9904),
2133 .driver_info = (unsigned long) &smsc95xx_info,
2134 },
2135 {
2136 /* SMSC9500A USB Ethernet Device (HAL) */
2137 USB_DEVICE(0x0424, 0x9905),
2138 .driver_info = (unsigned long) &smsc95xx_info,
2139 },
2140 {
2141 /* SMSC9505A USB Ethernet Device (HAL) */
2142 USB_DEVICE(0x0424, 0x9906),
2143 .driver_info = (unsigned long) &smsc95xx_info,
2144 },
2145 {
2146 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2147 USB_DEVICE(0x0424, 0x9907),
2148 .driver_info = (unsigned long) &smsc95xx_info,
2149 },
2150 {
2151 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2152 USB_DEVICE(0x0424, 0x9908),
2153 .driver_info = (unsigned long) &smsc95xx_info,
2154 },
2155 {
2156 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2157 USB_DEVICE(0x0424, 0x9909),
2158 .driver_info = (unsigned long) &smsc95xx_info,
2159 },
2160 {
2161 /* SMSC LAN9530 USB Ethernet Device */
2162 USB_DEVICE(0x0424, 0x9530),
2163 .driver_info = (unsigned long) &smsc95xx_info,
2164 },
2165 {
2166 /* SMSC LAN9730 USB Ethernet Device */
2167 USB_DEVICE(0x0424, 0x9730),
2168 .driver_info = (unsigned long) &smsc95xx_info,
2169 },
2170 {
2171 /* SMSC LAN89530 USB Ethernet Device */
2172 USB_DEVICE(0x0424, 0x9E08),
2173 .driver_info = (unsigned long) &smsc95xx_info,
2174 },
2175 {
2176 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */
2177 USB_DEVICE(0x0878, 0x1400),
2178 .driver_info = (unsigned long)&smsc95xx_info,
2179 },
2180 {
2181 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */
2182 USB_DEVICE(0x184F, 0x0051),
2183 .driver_info = (unsigned long)&smsc95xx_info,
2184 },
2185 { }, /* END */
2186 };
2187 MODULE_DEVICE_TABLE(usb, products);
2188
2189 static struct usb_driver smsc95xx_driver = {
2190 .name = "smsc95xx",
2191 .id_table = products,
2192 .probe = usbnet_probe,
2193 .suspend = smsc95xx_suspend,
2194 .resume = smsc95xx_resume,
2195 .reset_resume = smsc95xx_reset_resume,
2196 .disconnect = usbnet_disconnect,
2197 .disable_hub_initiated_lpm = 1,
2198 .supports_autosuspend = 1,
2199 };
2200
2201 module_usb_driver(smsc95xx_driver);
2202
2203 MODULE_AUTHOR("Nancy Lin");
2204 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2205 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2206 MODULE_LICENSE("GPL");
2207