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drm/panel: panel-himax-hx83102: support for csot-pna957qt1-1 MIPI-DSI panel
[drm/drm-misc.git] / drivers / net / usb / smsc95xx.c
blob8e82184be5e7d9954b83aae904a37bb7eda175bb
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 spinlock_t mac_cr_lock;
67 u8 features;
68 u8 suspend_flags;
69 bool is_internal_phy;
70 struct irq_chip irqchip;
71 struct irq_domain *irqdomain;
72 struct fwnode_handle *irqfwnode;
73 struct mii_bus *mdiobus;
74 struct phy_device *phydev;
75 struct task_struct *pm_task;
76 };
77
78 static bool turbo_mode = true;
79 module_param(turbo_mode, bool, 0644);
80 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
81
82 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
83 u32 *data)
84 {
85 struct smsc95xx_priv *pdata = dev->driver_priv;
86 u32 buf;
87 int ret;
88 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
89
90 if (current != pdata->pm_task)
91 fn = usbnet_read_cmd;
92 else
93 fn = usbnet_read_cmd_nopm;
94
95 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
96 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
97 0, index, &buf, 4);
98 if (ret < 4) {
99 ret = ret < 0 ? ret : -ENODATA;
100
101 if (ret != -ENODEV)
102 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
103 index, ret);
104 return ret;
105 }
106
107 le32_to_cpus(&buf);
108 *data = buf;
109
110 return ret;
111 }
112
113 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
114 u32 data)
115 {
116 struct smsc95xx_priv *pdata = dev->driver_priv;
117 u32 buf;
118 int ret;
119 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
120
121 if (current != pdata->pm_task)
122 fn = usbnet_write_cmd;
123 else
124 fn = usbnet_write_cmd_nopm;
125
126 buf = data;
127 cpu_to_le32s(&buf);
128
129 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
130 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
131 0, index, &buf, 4);
132 if (ret < 0 && ret != -ENODEV)
133 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
134 index, ret);
135
136 return ret;
137 }
138
139 /* Loop until the read is completed with timeout
140 * called with phy_mutex held */
141 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
142 {
143 unsigned long start_time = jiffies;
144 u32 val;
145 int ret;
146
147 do {
148 ret = smsc95xx_read_reg(dev, MII_ADDR, &val);
149 if (ret < 0) {
150 /* Ignore -ENODEV error during disconnect() */
151 if (ret == -ENODEV)
152 return 0;
153 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
154 return ret;
155 }
156
157 if (!(val & MII_BUSY_))
158 return 0;
159 } while (!time_after(jiffies, start_time + HZ));
160
161 return -EIO;
162 }
163
164 static u32 mii_address_cmd(int phy_id, int idx, u16 op)
165 {
166 return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op;
167 }
168
169 static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx)
170 {
171 u32 val, addr;
172 int ret;
173
174 mutex_lock(&dev->phy_mutex);
175
176 /* confirm MII not busy */
177 ret = smsc95xx_phy_wait_not_busy(dev);
178 if (ret < 0) {
179 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
180 goto done;
181 }
182
183 /* set the address, index & direction (read from PHY) */
184 addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_);
185 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
186 if (ret < 0) {
187 if (ret != -ENODEV)
188 netdev_warn(dev->net, "Error writing MII_ADDR\n");
189 goto done;
190 }
191
192 ret = smsc95xx_phy_wait_not_busy(dev);
193 if (ret < 0) {
194 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
195 goto done;
196 }
197
198 ret = smsc95xx_read_reg(dev, MII_DATA, &val);
199 if (ret < 0) {
200 if (ret != -ENODEV)
201 netdev_warn(dev->net, "Error reading MII_DATA\n");
202 goto done;
203 }
204
205 ret = (u16)(val & 0xFFFF);
206
207 done:
208 mutex_unlock(&dev->phy_mutex);
209
210 /* Ignore -ENODEV error during disconnect() */
211 if (ret == -ENODEV)
212 return 0;
213 return ret;
214 }
215
216 static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx,
217 int regval)
218 {
219 u32 val, addr;
220 int ret;
221
222 mutex_lock(&dev->phy_mutex);
223
224 /* confirm MII not busy */
225 ret = smsc95xx_phy_wait_not_busy(dev);
226 if (ret < 0) {
227 netdev_warn(dev->net, "%s: MII is busy\n", __func__);
228 goto done;
229 }
230
231 val = regval;
232 ret = smsc95xx_write_reg(dev, MII_DATA, val);
233 if (ret < 0) {
234 if (ret != -ENODEV)
235 netdev_warn(dev->net, "Error writing MII_DATA\n");
236 goto done;
237 }
238
239 /* set the address, index & direction (write to PHY) */
240 addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_);
241 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
242 if (ret < 0) {
243 if (ret != -ENODEV)
244 netdev_warn(dev->net, "Error writing MII_ADDR\n");
245 goto done;
246 }
247
248 ret = smsc95xx_phy_wait_not_busy(dev);
249 if (ret < 0) {
250 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
251 goto done;
252 }
253
254 done:
255 mutex_unlock(&dev->phy_mutex);
256 }
257
258 static int smsc95xx_mdiobus_reset(struct mii_bus *bus)
259 {
260 struct smsc95xx_priv *pdata;
261 struct usbnet *dev;
262 u32 val;
263 int ret;
264
265 dev = bus->priv;
266 pdata = dev->driver_priv;
267
268 if (pdata->is_internal_phy)
269 return 0;
270
271 mutex_lock(&dev->phy_mutex);
272
273 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
274 if (ret < 0)
275 goto reset_out;
276
277 val |= PM_CTL_PHY_RST_;
278
279 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
280 if (ret < 0)
281 goto reset_out;
282
283 /* Driver has no knowledge at this point about the external PHY.
284 * The 802.3 specifies that the reset process shall
285 * be completed within 0.5 s.
286 */
287 fsleep(500000);
288
289 reset_out:
290 mutex_unlock(&dev->phy_mutex);
291
292 return 0;
293 }
294
295 static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
296 {
297 struct usbnet *dev = bus->priv;
298
299 return smsc95xx_mdio_read(dev, phy_id, idx);
300 }
301
302 static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
303 u16 regval)
304 {
305 struct usbnet *dev = bus->priv;
306
307 smsc95xx_mdio_write(dev, phy_id, idx, regval);
308 return 0;
309 }
310
311 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
312 {
313 unsigned long start_time = jiffies;
314 u32 val;
315 int ret;
316
317 do {
318 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
319 if (ret < 0) {
320 netdev_warn(dev->net, "Error reading E2P_CMD\n");
321 return ret;
322 }
323
324 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
325 break;
326 udelay(40);
327 } while (!time_after(jiffies, start_time + HZ));
328
329 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
330 netdev_warn(dev->net, "EEPROM read operation timeout\n");
331 return -EIO;
332 }
333
334 return 0;
335 }
336
337 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
338 {
339 unsigned long start_time = jiffies;
340 u32 val;
341 int ret;
342
343 do {
344 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
345 if (ret < 0) {
346 netdev_warn(dev->net, "Error reading E2P_CMD\n");
347 return ret;
348 }
349
350 if (!(val & E2P_CMD_BUSY_))
351 return 0;
352
353 udelay(40);
354 } while (!time_after(jiffies, start_time + HZ));
355
356 netdev_warn(dev->net, "EEPROM is busy\n");
357 return -EIO;
358 }
359
360 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
361 u8 *data)
362 {
363 u32 val;
364 int i, ret;
365
366 BUG_ON(!dev);
367 BUG_ON(!data);
368
369 ret = smsc95xx_eeprom_confirm_not_busy(dev);
370 if (ret)
371 return ret;
372
373 for (i = 0; i < length; i++) {
374 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
375 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
376 if (ret < 0) {
377 netdev_warn(dev->net, "Error writing E2P_CMD\n");
378 return ret;
379 }
380
381 ret = smsc95xx_wait_eeprom(dev);
382 if (ret < 0)
383 return ret;
384
385 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
386 if (ret < 0) {
387 netdev_warn(dev->net, "Error reading E2P_DATA\n");
388 return ret;
389 }
390
391 data[i] = val & 0xFF;
392 offset++;
393 }
394
395 return 0;
396 }
397
398 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
399 u8 *data)
400 {
401 u32 val;
402 int i, ret;
403
404 BUG_ON(!dev);
405 BUG_ON(!data);
406
407 ret = smsc95xx_eeprom_confirm_not_busy(dev);
408 if (ret)
409 return ret;
410
411 /* Issue write/erase enable command */
412 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
413 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
414 if (ret < 0) {
415 netdev_warn(dev->net, "Error writing E2P_DATA\n");
416 return ret;
417 }
418
419 ret = smsc95xx_wait_eeprom(dev);
420 if (ret < 0)
421 return ret;
422
423 for (i = 0; i < length; i++) {
424
425 /* Fill data register */
426 val = data[i];
427 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
428 if (ret < 0) {
429 netdev_warn(dev->net, "Error writing E2P_DATA\n");
430 return ret;
431 }
432
433 /* Send "write" command */
434 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
435 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
436 if (ret < 0) {
437 netdev_warn(dev->net, "Error writing E2P_CMD\n");
438 return ret;
439 }
440
441 ret = smsc95xx_wait_eeprom(dev);
442 if (ret < 0)
443 return ret;
444
445 offset++;
446 }
447
448 return 0;
449 }
450
451 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
452 u32 data)
453 {
454 const u16 size = 4;
455 u32 buf;
456 int ret;
457
458 buf = data;
459 cpu_to_le32s(&buf);
460
461 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
462 USB_DIR_OUT | USB_TYPE_VENDOR |
463 USB_RECIP_DEVICE,
464 0, index, &buf, size);
465 if (ret < 0)
466 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
467 ret);
468 return ret;
469 }
470
471 /* returns hash bit number for given MAC address
472 * example:
473 * 01 00 5E 00 00 01 -> returns bit number 31 */
474 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
475 {
476 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
477 }
478
479 static void smsc95xx_set_multicast(struct net_device *netdev)
480 {
481 struct usbnet *dev = netdev_priv(netdev);
482 struct smsc95xx_priv *pdata = dev->driver_priv;
483 unsigned long flags;
484 int ret;
485
486 pdata->hash_hi = 0;
487 pdata->hash_lo = 0;
488
489 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
490
491 if (dev->net->flags & IFF_PROMISC) {
492 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
493 pdata->mac_cr |= MAC_CR_PRMS_;
494 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
495 } else if (dev->net->flags & IFF_ALLMULTI) {
496 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
497 pdata->mac_cr |= MAC_CR_MCPAS_;
498 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
499 } else if (!netdev_mc_empty(dev->net)) {
500 struct netdev_hw_addr *ha;
501
502 pdata->mac_cr |= MAC_CR_HPFILT_;
503 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
504
505 netdev_for_each_mc_addr(ha, netdev) {
506 u32 bitnum = smsc95xx_hash(ha->addr);
507 u32 mask = 0x01 << (bitnum & 0x1F);
508 if (bitnum & 0x20)
509 pdata->hash_hi |= mask;
510 else
511 pdata->hash_lo |= mask;
512 }
513
514 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
515 pdata->hash_hi, pdata->hash_lo);
516 } else {
517 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
518 pdata->mac_cr &=
519 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
520 }
521
522 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
523
524 /* Initiate async writes, as we can't wait for completion here */
525 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
526 if (ret < 0)
527 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
528
529 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
530 if (ret < 0)
531 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
532
533 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
534 if (ret < 0)
535 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
536 }
537
538 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev)
539 {
540 u32 flow = 0, afc_cfg;
541 struct smsc95xx_priv *pdata = dev->driver_priv;
542 bool tx_pause, rx_pause;
543
544 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
545 if (ret < 0)
546 return ret;
547
548 if (pdata->phydev->duplex == DUPLEX_FULL) {
549 phy_get_pause(pdata->phydev, &tx_pause, &rx_pause);
550
551 if (rx_pause)
552 flow = 0xFFFF0002;
553
554 if (tx_pause) {
555 afc_cfg |= 0xF;
556 flow |= 0xFFFF0000;
557 } else {
558 afc_cfg &= ~0xF;
559 }
560
561 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
562 rx_pause ? "enabled" : "disabled",
563 tx_pause ? "enabled" : "disabled");
564 } else {
565 netif_dbg(dev, link, dev->net, "half duplex\n");
566 afc_cfg |= 0xF;
567 }
568
569 ret = smsc95xx_write_reg(dev, FLOW, flow);
570 if (ret < 0)
571 return ret;
572
573 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
574 }
575
576 static void smsc95xx_mac_update_fullduplex(struct usbnet *dev)
577 {
578 struct smsc95xx_priv *pdata = dev->driver_priv;
579 unsigned long flags;
580 int ret;
581
582 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
583 if (pdata->phydev->duplex != DUPLEX_FULL) {
584 pdata->mac_cr &= ~MAC_CR_FDPX_;
585 pdata->mac_cr |= MAC_CR_RCVOWN_;
586 } else {
587 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
588 pdata->mac_cr |= MAC_CR_FDPX_;
589 }
590 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
591
592 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
593 if (ret < 0) {
594 if (ret != -ENODEV)
595 netdev_warn(dev->net,
596 "Error updating MAC full duplex mode\n");
597 return;
598 }
599
600 ret = smsc95xx_phy_update_flowcontrol(dev);
601 if (ret < 0)
602 netdev_warn(dev->net, "Error updating PHY flow control\n");
603 }
604
605 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
606 {
607 struct smsc95xx_priv *pdata = dev->driver_priv;
608 unsigned long flags;
609 u32 intdata;
610
611 if (urb->actual_length != 4) {
612 netdev_warn(dev->net, "unexpected urb length %d\n",
613 urb->actual_length);
614 return;
615 }
616
617 intdata = get_unaligned_le32(urb->transfer_buffer);
618 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
619
620 local_irq_save(flags);
621
622 if (intdata & INT_ENP_PHY_INT_)
623 generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ);
624 else
625 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
626 intdata);
627
628 local_irq_restore(flags);
629 }
630
631 /* Enable or disable Tx & Rx checksum offload engines */
632 static int smsc95xx_set_features(struct net_device *netdev,
633 netdev_features_t features)
634 {
635 struct usbnet *dev = netdev_priv(netdev);
636 u32 read_buf;
637 int ret;
638
639 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
640 if (ret < 0)
641 return ret;
642
643 if (features & NETIF_F_IP_CSUM)
644 read_buf |= Tx_COE_EN_;
645 else
646 read_buf &= ~Tx_COE_EN_;
647
648 if (features & NETIF_F_RXCSUM)
649 read_buf |= Rx_COE_EN_;
650 else
651 read_buf &= ~Rx_COE_EN_;
652
653 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
654 if (ret < 0)
655 return ret;
656
657 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
658 return 0;
659 }
660
661 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
662 {
663 return MAX_EEPROM_SIZE;
664 }
665
666 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
667 struct ethtool_eeprom *ee, u8 *data)
668 {
669 struct usbnet *dev = netdev_priv(netdev);
670
671 ee->magic = LAN95XX_EEPROM_MAGIC;
672
673 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
674 }
675
676 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
677 struct ethtool_eeprom *ee, u8 *data)
678 {
679 struct usbnet *dev = netdev_priv(netdev);
680
681 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
682 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
683 ee->magic);
684 return -EINVAL;
685 }
686
687 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
688 }
689
690 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
691 {
692 /* all smsc95xx registers */
693 return COE_CR - ID_REV + sizeof(u32);
694 }
695
696 static void
697 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
698 void *buf)
699 {
700 struct usbnet *dev = netdev_priv(netdev);
701 unsigned int i, j;
702 int retval;
703 u32 *data = buf;
704
705 retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
706 if (retval < 0) {
707 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
708 return;
709 }
710
711 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
712 retval = smsc95xx_read_reg(dev, i, &data[j]);
713 if (retval < 0) {
714 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
715 return;
716 }
717 }
718 }
719
720 static void smsc95xx_ethtool_get_wol(struct net_device *net,
721 struct ethtool_wolinfo *wolinfo)
722 {
723 struct usbnet *dev = netdev_priv(net);
724 struct smsc95xx_priv *pdata = dev->driver_priv;
725
726 wolinfo->supported = SUPPORTED_WAKE;
727 wolinfo->wolopts = pdata->wolopts;
728 }
729
730 static int smsc95xx_ethtool_set_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 int ret;
736
737 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
738 return -EINVAL;
739
740 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
741
742 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
743 if (ret < 0)
744 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
745
746 return ret;
747 }
748
749 static u32 smsc95xx_get_link(struct net_device *net)
750 {
751 phy_read_status(net->phydev);
752 return net->phydev->link;
753 }
754
755 static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset,
756 u8 *data)
757 {
758 switch (sset) {
759 case ETH_SS_TEST:
760 net_selftest_get_strings(data);
761 break;
762 }
763 }
764
765 static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset)
766 {
767 switch (sset) {
768 case ETH_SS_TEST:
769 return net_selftest_get_count();
770 default:
771 return -EOPNOTSUPP;
772 }
773 }
774
775 static const struct ethtool_ops smsc95xx_ethtool_ops = {
776 .get_link = smsc95xx_get_link,
777 .nway_reset = phy_ethtool_nway_reset,
778 .get_drvinfo = usbnet_get_drvinfo,
779 .get_msglevel = usbnet_get_msglevel,
780 .set_msglevel = usbnet_set_msglevel,
781 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
782 .get_eeprom = smsc95xx_ethtool_get_eeprom,
783 .set_eeprom = smsc95xx_ethtool_set_eeprom,
784 .get_regs_len = smsc95xx_ethtool_getregslen,
785 .get_regs = smsc95xx_ethtool_getregs,
786 .get_wol = smsc95xx_ethtool_get_wol,
787 .set_wol = smsc95xx_ethtool_set_wol,
788 .get_link_ksettings = phy_ethtool_get_link_ksettings,
789 .set_link_ksettings = phy_ethtool_set_link_ksettings,
790 .get_ts_info = ethtool_op_get_ts_info,
791 .self_test = net_selftest,
792 .get_strings = smsc95xx_ethtool_get_strings,
793 .get_sset_count = smsc95xx_ethtool_get_sset_count,
794 };
795
796 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
797 {
798 if (!netif_running(netdev))
799 return -EINVAL;
800
801 return phy_mii_ioctl(netdev->phydev, rq, cmd);
802 }
803
804 static void smsc95xx_init_mac_address(struct usbnet *dev)
805 {
806 u8 addr[ETH_ALEN];
807
808 /* maybe the boot loader passed the MAC address in devicetree */
809 if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
810 if (is_valid_ether_addr(dev->net->dev_addr)) {
811 /* device tree values are valid so use them */
812 netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
813 return;
814 }
815 }
816
817 /* try reading mac address from EEPROM */
818 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
819 eth_hw_addr_set(dev->net, addr);
820 if (is_valid_ether_addr(dev->net->dev_addr)) {
821 /* eeprom values are valid so use them */
822 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
823 return;
824 }
825 }
826
827 /* no useful static MAC address found. generate a random one */
828 eth_hw_addr_random(dev->net);
829 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
830 }
831
832 static int smsc95xx_set_mac_address(struct usbnet *dev)
833 {
834 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
835 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
836 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
837 int ret;
838
839 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
840 if (ret < 0)
841 return ret;
842
843 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
844 }
845
846 /* starts the TX path */
847 static int smsc95xx_start_tx_path(struct usbnet *dev)
848 {
849 struct smsc95xx_priv *pdata = dev->driver_priv;
850 unsigned long flags;
851 int ret;
852
853 /* Enable Tx at MAC */
854 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
855 pdata->mac_cr |= MAC_CR_TXEN_;
856 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
857
858 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
859 if (ret < 0)
860 return ret;
861
862 /* Enable Tx at SCSRs */
863 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
864 }
865
866 /* Starts the Receive path */
867 static int smsc95xx_start_rx_path(struct usbnet *dev)
868 {
869 struct smsc95xx_priv *pdata = dev->driver_priv;
870 unsigned long flags;
871
872 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
873 pdata->mac_cr |= MAC_CR_RXEN_;
874 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
875
876 return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
877 }
878
879 static int smsc95xx_reset(struct usbnet *dev)
880 {
881 struct smsc95xx_priv *pdata = dev->driver_priv;
882 u32 read_buf, burst_cap;
883 int ret = 0, timeout;
884
885 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
886
887 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
888 if (ret < 0)
889 return ret;
890
891 timeout = 0;
892 do {
893 msleep(10);
894 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
895 if (ret < 0)
896 return ret;
897 timeout++;
898 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
899
900 if (timeout >= 100) {
901 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
902 return -ETIMEDOUT;
903 }
904
905 ret = smsc95xx_set_mac_address(dev);
906 if (ret < 0)
907 return ret;
908
909 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
910 dev->net->dev_addr);
911
912 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
913 if (ret < 0)
914 return ret;
915
916 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
917 read_buf);
918
919 read_buf |= HW_CFG_BIR_;
920
921 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
922 if (ret < 0)
923 return ret;
924
925 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
926 if (ret < 0)
927 return ret;
928
929 netif_dbg(dev, ifup, dev->net,
930 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
931 read_buf);
932
933 if (!turbo_mode) {
934 burst_cap = 0;
935 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
936 } else if (dev->udev->speed == USB_SPEED_HIGH) {
937 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
938 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
939 } else {
940 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
941 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
942 }
943
944 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
945 (ulong)dev->rx_urb_size);
946
947 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
948 if (ret < 0)
949 return ret;
950
951 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
952 if (ret < 0)
953 return ret;
954
955 netif_dbg(dev, ifup, dev->net,
956 "Read Value from BURST_CAP after writing: 0x%08x\n",
957 read_buf);
958
959 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
960 if (ret < 0)
961 return ret;
962
963 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
964 if (ret < 0)
965 return ret;
966
967 netif_dbg(dev, ifup, dev->net,
968 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
969 read_buf);
970
971 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
972 if (ret < 0)
973 return ret;
974
975 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
976 read_buf);
977
978 if (turbo_mode)
979 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
980
981 read_buf &= ~HW_CFG_RXDOFF_;
982
983 /* set Rx data offset=2, Make IP header aligns on word boundary. */
984 read_buf |= NET_IP_ALIGN << 9;
985
986 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
987 if (ret < 0)
988 return ret;
989
990 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
991 if (ret < 0)
992 return ret;
993
994 netif_dbg(dev, ifup, dev->net,
995 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
996
997 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
998 if (ret < 0)
999 return ret;
1000
1001 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1002 if (ret < 0)
1003 return ret;
1004 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1005
1006 ret = smsc95xx_read_reg(dev, LED_GPIO_CFG, &read_buf);
1007 if (ret < 0)
1008 return ret;
1009 /* Configure GPIO pins as LED outputs */
1010 read_buf |= LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1011 LED_GPIO_CFG_FDX_LED;
1012 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, read_buf);
1013 if (ret < 0)
1014 return ret;
1015
1016 /* Init Tx */
1017 ret = smsc95xx_write_reg(dev, FLOW, 0);
1018 if (ret < 0)
1019 return ret;
1020
1021 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1022 if (ret < 0)
1023 return ret;
1024
1025 /* Don't need mac_cr_lock during initialisation */
1026 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1027 if (ret < 0)
1028 return ret;
1029
1030 /* Init Rx */
1031 /* Set Vlan */
1032 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1033 if (ret < 0)
1034 return ret;
1035
1036 /* Enable or disable checksum offload engines */
1037 ret = smsc95xx_set_features(dev->net, dev->net->features);
1038 if (ret < 0) {
1039 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1040 return ret;
1041 }
1042
1043 smsc95xx_set_multicast(dev->net);
1044
1045 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1046 if (ret < 0)
1047 return ret;
1048
1049 /* enable PHY interrupts */
1050 read_buf |= INT_EP_CTL_PHY_INT_;
1051
1052 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1053 if (ret < 0)
1054 return ret;
1055
1056 ret = smsc95xx_start_tx_path(dev);
1057 if (ret < 0) {
1058 netdev_warn(dev->net, "Failed to start TX path\n");
1059 return ret;
1060 }
1061
1062 ret = smsc95xx_start_rx_path(dev);
1063 if (ret < 0) {
1064 netdev_warn(dev->net, "Failed to start RX path\n");
1065 return ret;
1066 }
1067
1068 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1069 return 0;
1070 }
1071
1072 static const struct net_device_ops smsc95xx_netdev_ops = {
1073 .ndo_open = usbnet_open,
1074 .ndo_stop = usbnet_stop,
1075 .ndo_start_xmit = usbnet_start_xmit,
1076 .ndo_tx_timeout = usbnet_tx_timeout,
1077 .ndo_change_mtu = usbnet_change_mtu,
1078 .ndo_get_stats64 = dev_get_tstats64,
1079 .ndo_set_mac_address = eth_mac_addr,
1080 .ndo_validate_addr = eth_validate_addr,
1081 .ndo_eth_ioctl = smsc95xx_ioctl,
1082 .ndo_set_rx_mode = smsc95xx_set_multicast,
1083 .ndo_set_features = smsc95xx_set_features,
1084 };
1085
1086 static void smsc95xx_handle_link_change(struct net_device *net)
1087 {
1088 struct usbnet *dev = netdev_priv(net);
1089
1090 phy_print_status(net->phydev);
1091 smsc95xx_mac_update_fullduplex(dev);
1092 usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
1093 }
1094
1095 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1096 {
1097 struct smsc95xx_priv *pdata;
1098 char usb_path[64];
1099 int ret, phy_irq;
1100 u32 val;
1101
1102 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1103
1104 ret = usbnet_get_endpoints(dev, intf);
1105 if (ret < 0) {
1106 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1107 return ret;
1108 }
1109
1110 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
1111 if (!pdata)
1112 return -ENOMEM;
1113
1114 dev->driver_priv = pdata;
1115
1116 spin_lock_init(&pdata->mac_cr_lock);
1117
1118 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1119 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1120 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1121 * it is transmitted as all ones. The zero transmitted checksum means
1122 * transmitter generated no checksum. Hence, enable csum offload only
1123 * for ipv4 packets.
1124 */
1125 if (DEFAULT_TX_CSUM_ENABLE)
1126 dev->net->features |= NETIF_F_IP_CSUM;
1127 if (DEFAULT_RX_CSUM_ENABLE)
1128 dev->net->features |= NETIF_F_RXCSUM;
1129
1130 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1131 set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1132
1133 smsc95xx_init_mac_address(dev);
1134
1135 /* Init all registers */
1136 ret = smsc95xx_reset(dev);
1137 if (ret)
1138 goto free_pdata;
1139
1140 /* create irq domain for use by PHY driver and GPIO consumers */
1141 usb_make_path(dev->udev, usb_path, sizeof(usb_path));
1142 pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path);
1143 if (!pdata->irqfwnode) {
1144 ret = -ENOMEM;
1145 goto free_pdata;
1146 }
1147
1148 pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode,
1149 SMSC95XX_NR_IRQS,
1150 &irq_domain_simple_ops,
1151 pdata);
1152 if (!pdata->irqdomain) {
1153 ret = -ENOMEM;
1154 goto free_irqfwnode;
1155 }
1156
1157 phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ);
1158 if (!phy_irq) {
1159 ret = -ENOENT;
1160 goto remove_irqdomain;
1161 }
1162
1163 pdata->irqchip = dummy_irq_chip;
1164 pdata->irqchip.name = SMSC_CHIPNAME;
1165 irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip,
1166 handle_simple_irq, "phy");
1167
1168 pdata->mdiobus = mdiobus_alloc();
1169 if (!pdata->mdiobus) {
1170 ret = -ENOMEM;
1171 goto dispose_irq;
1172 }
1173
1174 ret = smsc95xx_read_reg(dev, HW_CFG, &val);
1175 if (ret < 0)
1176 goto free_mdio;
1177
1178 pdata->is_internal_phy = !(val & HW_CFG_PSEL_);
1179 if (pdata->is_internal_phy)
1180 pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID);
1181
1182 pdata->mdiobus->priv = dev;
1183 pdata->mdiobus->read = smsc95xx_mdiobus_read;
1184 pdata->mdiobus->write = smsc95xx_mdiobus_write;
1185 pdata->mdiobus->reset = smsc95xx_mdiobus_reset;
1186 pdata->mdiobus->name = "smsc95xx-mdiobus";
1187 pdata->mdiobus->parent = &dev->udev->dev;
1188
1189 snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id),
1190 "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);
1191
1192 ret = mdiobus_register(pdata->mdiobus);
1193 if (ret) {
1194 netdev_err(dev->net, "Could not register MDIO bus\n");
1195 goto free_mdio;
1196 }
1197
1198 pdata->phydev = phy_find_first(pdata->mdiobus);
1199 if (!pdata->phydev) {
1200 netdev_err(dev->net, "no PHY found\n");
1201 ret = -ENODEV;
1202 goto unregister_mdio;
1203 }
1204
1205 pdata->phydev->irq = phy_irq;
1206 pdata->phydev->is_internal = pdata->is_internal_phy;
1207
1208 /* detect device revision as different features may be available */
1209 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1210 if (ret < 0)
1211 goto unregister_mdio;
1212
1213 val >>= 16;
1214 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1215 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1216 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1217 FEATURE_PHY_NLP_CROSSOVER |
1218 FEATURE_REMOTE_WAKEUP);
1219 else if (val == ID_REV_CHIP_ID_9512_)
1220 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1221
1222 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1223 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1224 dev->net->flags |= IFF_MULTICAST;
1225 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1226 dev->net->min_mtu = ETH_MIN_MTU;
1227 dev->net->max_mtu = ETH_DATA_LEN;
1228 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1229
1230 ret = phy_connect_direct(dev->net, pdata->phydev,
1231 &smsc95xx_handle_link_change,
1232 PHY_INTERFACE_MODE_MII);
1233 if (ret) {
1234 netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id);
1235 goto unregister_mdio;
1236 }
1237
1238 phy_attached_info(dev->net->phydev);
1239
1240 return 0;
1241
1242 unregister_mdio:
1243 mdiobus_unregister(pdata->mdiobus);
1244
1245 free_mdio:
1246 mdiobus_free(pdata->mdiobus);
1247
1248 dispose_irq:
1249 irq_dispose_mapping(phy_irq);
1250
1251 remove_irqdomain:
1252 irq_domain_remove(pdata->irqdomain);
1253
1254 free_irqfwnode:
1255 irq_domain_free_fwnode(pdata->irqfwnode);
1256
1257 free_pdata:
1258 kfree(pdata);
1259 return ret;
1260 }
1261
1262 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1263 {
1264 struct smsc95xx_priv *pdata = dev->driver_priv;
1265
1266 phy_disconnect(dev->net->phydev);
1267 mdiobus_unregister(pdata->mdiobus);
1268 mdiobus_free(pdata->mdiobus);
1269 irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ));
1270 irq_domain_remove(pdata->irqdomain);
1271 irq_domain_free_fwnode(pdata->irqfwnode);
1272 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1273 kfree(pdata);
1274 }
1275
1276 static int smsc95xx_start_phy(struct usbnet *dev)
1277 {
1278 phy_start(dev->net->phydev);
1279
1280 return 0;
1281 }
1282
1283 static int smsc95xx_stop(struct usbnet *dev)
1284 {
1285 phy_stop(dev->net->phydev);
1286
1287 return 0;
1288 }
1289
1290 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1291 {
1292 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1293 return crc << ((filter % 2) * 16);
1294 }
1295
1296 static int smsc95xx_link_ok(struct usbnet *dev)
1297 {
1298 struct smsc95xx_priv *pdata = dev->driver_priv;
1299 int ret;
1300
1301 /* first, a dummy read, needed to latch some MII phys */
1302 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1303 if (ret < 0)
1304 return ret;
1305
1306 ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR);
1307 if (ret < 0)
1308 return ret;
1309
1310 return !!(ret & BMSR_LSTATUS);
1311 }
1312
1313 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1314 {
1315 struct smsc95xx_priv *pdata = dev->driver_priv;
1316 u32 val;
1317 int ret;
1318
1319 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1320 if (ret < 0)
1321 return ret;
1322
1323 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1324 val |= PM_CTL_SUS_MODE_0;
1325
1326 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1327 if (ret < 0)
1328 return ret;
1329
1330 /* clear wol status */
1331 val &= ~PM_CTL_WUPS_;
1332 val |= PM_CTL_WUPS_WOL_;
1333
1334 /* enable energy detection */
1335 if (pdata->wolopts & WAKE_PHY)
1336 val |= PM_CTL_WUPS_ED_;
1337
1338 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1339 if (ret < 0)
1340 return ret;
1341
1342 /* read back PM_CTRL */
1343 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1344 if (ret < 0)
1345 return ret;
1346
1347 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1348
1349 return 0;
1350 }
1351
1352 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1353 {
1354 struct smsc95xx_priv *pdata = dev->driver_priv;
1355 int ret, phy_id = pdata->phydev->mdio.addr;
1356 u32 val;
1357
1358 /* reconfigure link pulse detection timing for
1359 * compatibility with non-standard link partners
1360 */
1361 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1362 smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG,
1363 PHY_EDPD_CONFIG_DEFAULT);
1364
1365 /* enable energy detect power-down mode */
1366 ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS);
1367 if (ret < 0)
1368 return ret;
1369
1370 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1371
1372 smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret);
1373
1374 /* enter SUSPEND1 mode */
1375 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1376 if (ret < 0)
1377 return ret;
1378
1379 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1380 val |= PM_CTL_SUS_MODE_1;
1381
1382 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1383 if (ret < 0)
1384 return ret;
1385
1386 /* clear wol status, enable energy detection */
1387 val &= ~PM_CTL_WUPS_;
1388 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1389
1390 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1391 if (ret < 0)
1392 return ret;
1393
1394 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1395
1396 return 0;
1397 }
1398
1399 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1400 {
1401 struct smsc95xx_priv *pdata = dev->driver_priv;
1402 u32 val;
1403 int ret;
1404
1405 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1406 if (ret < 0)
1407 return ret;
1408
1409 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1410 val |= PM_CTL_SUS_MODE_2;
1411
1412 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1413 if (ret < 0)
1414 return ret;
1415
1416 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1417
1418 return 0;
1419 }
1420
1421 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1422 {
1423 struct smsc95xx_priv *pdata = dev->driver_priv;
1424 u32 val;
1425 int ret;
1426
1427 ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val);
1428 if (ret < 0)
1429 return ret;
1430
1431 if (val & RX_FIFO_INF_USED_) {
1432 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1433 return -EBUSY;
1434 }
1435
1436 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1437 if (ret < 0)
1438 return ret;
1439
1440 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1441 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1442
1443 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1444 if (ret < 0)
1445 return ret;
1446
1447 /* clear wol status */
1448 val &= ~PM_CTL_WUPS_;
1449 val |= PM_CTL_WUPS_WOL_;
1450
1451 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1452 if (ret < 0)
1453 return ret;
1454
1455 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1456
1457 return 0;
1458 }
1459
1460 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1461 {
1462 struct smsc95xx_priv *pdata = dev->driver_priv;
1463
1464 if (!netif_running(dev->net)) {
1465 /* interface is ifconfig down so fully power down hw */
1466 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1467 return smsc95xx_enter_suspend2(dev);
1468 }
1469
1470 if (!link_up) {
1471 /* link is down so enter EDPD mode, but only if device can
1472 * reliably resume from it. This check should be redundant
1473 * as current FEATURE_REMOTE_WAKEUP parts also support
1474 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1475 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1476 netdev_warn(dev->net, "EDPD not supported\n");
1477 return -EBUSY;
1478 }
1479
1480 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1481 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1482 return smsc95xx_enter_suspend1(dev);
1483 }
1484
1485 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1486 return smsc95xx_enter_suspend3(dev);
1487 }
1488
1489 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1490 {
1491 struct usbnet *dev = usb_get_intfdata(intf);
1492 struct smsc95xx_priv *pdata = dev->driver_priv;
1493 u32 val, link_up;
1494 int ret;
1495
1496 pdata->pm_task = current;
1497
1498 ret = usbnet_suspend(intf, message);
1499 if (ret < 0) {
1500 netdev_warn(dev->net, "usbnet_suspend error\n");
1501 pdata->pm_task = NULL;
1502 return ret;
1503 }
1504
1505 if (pdata->suspend_flags) {
1506 netdev_warn(dev->net, "error during last resume\n");
1507 pdata->suspend_flags = 0;
1508 }
1509
1510 link_up = smsc95xx_link_ok(dev);
1511
1512 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1513 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1514 ret = smsc95xx_autosuspend(dev, link_up);
1515 goto done;
1516 }
1517
1518 /* if we get this far we're not autosuspending */
1519 /* if no wol options set, or if link is down and we're not waking on
1520 * PHY activity, enter lowest power SUSPEND2 mode
1521 */
1522 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1523 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1524 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1525
1526 /* disable energy detect (link up) & wake up events */
1527 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1528 if (ret < 0)
1529 goto done;
1530
1531 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1532
1533 ret = smsc95xx_write_reg(dev, WUCSR, val);
1534 if (ret < 0)
1535 goto done;
1536
1537 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1538 if (ret < 0)
1539 goto done;
1540
1541 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1542
1543 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1544 if (ret < 0)
1545 goto done;
1546
1547 ret = smsc95xx_enter_suspend2(dev);
1548 goto done;
1549 }
1550
1551 if (pdata->wolopts & WAKE_PHY) {
1552 /* if link is down then configure EDPD and enter SUSPEND1,
1553 * otherwise enter SUSPEND0 below
1554 */
1555 if (!link_up) {
1556 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1557 ret = smsc95xx_enter_suspend1(dev);
1558 goto done;
1559 }
1560 }
1561
1562 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1563 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1564 u32 command[2];
1565 u32 offset[2];
1566 u32 crc[4];
1567 int wuff_filter_count =
1568 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1569 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1570 int i, filter = 0;
1571
1572 if (!filter_mask) {
1573 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1574 ret = -ENOMEM;
1575 goto done;
1576 }
1577
1578 memset(command, 0, sizeof(command));
1579 memset(offset, 0, sizeof(offset));
1580 memset(crc, 0, sizeof(crc));
1581
1582 if (pdata->wolopts & WAKE_BCAST) {
1583 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1584 netdev_info(dev->net, "enabling broadcast detection\n");
1585 filter_mask[filter * 4] = 0x003F;
1586 filter_mask[filter * 4 + 1] = 0x00;
1587 filter_mask[filter * 4 + 2] = 0x00;
1588 filter_mask[filter * 4 + 3] = 0x00;
1589 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1590 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1591 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1592 filter++;
1593 }
1594
1595 if (pdata->wolopts & WAKE_MCAST) {
1596 const u8 mcast[] = {0x01, 0x00, 0x5E};
1597 netdev_info(dev->net, "enabling multicast detection\n");
1598 filter_mask[filter * 4] = 0x0007;
1599 filter_mask[filter * 4 + 1] = 0x00;
1600 filter_mask[filter * 4 + 2] = 0x00;
1601 filter_mask[filter * 4 + 3] = 0x00;
1602 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1603 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1604 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1605 filter++;
1606 }
1607
1608 if (pdata->wolopts & WAKE_ARP) {
1609 const u8 arp[] = {0x08, 0x06};
1610 netdev_info(dev->net, "enabling ARP detection\n");
1611 filter_mask[filter * 4] = 0x0003;
1612 filter_mask[filter * 4 + 1] = 0x00;
1613 filter_mask[filter * 4 + 2] = 0x00;
1614 filter_mask[filter * 4 + 3] = 0x00;
1615 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1616 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1617 crc[filter/2] |= smsc_crc(arp, 2, filter);
1618 filter++;
1619 }
1620
1621 if (pdata->wolopts & WAKE_UCAST) {
1622 netdev_info(dev->net, "enabling unicast detection\n");
1623 filter_mask[filter * 4] = 0x003F;
1624 filter_mask[filter * 4 + 1] = 0x00;
1625 filter_mask[filter * 4 + 2] = 0x00;
1626 filter_mask[filter * 4 + 3] = 0x00;
1627 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1628 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1629 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1630 filter++;
1631 }
1632
1633 for (i = 0; i < (wuff_filter_count * 4); i++) {
1634 ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]);
1635 if (ret < 0) {
1636 kfree(filter_mask);
1637 goto done;
1638 }
1639 }
1640 kfree(filter_mask);
1641
1642 for (i = 0; i < (wuff_filter_count / 4); i++) {
1643 ret = smsc95xx_write_reg(dev, WUFF, command[i]);
1644 if (ret < 0)
1645 goto done;
1646 }
1647
1648 for (i = 0; i < (wuff_filter_count / 4); i++) {
1649 ret = smsc95xx_write_reg(dev, WUFF, offset[i]);
1650 if (ret < 0)
1651 goto done;
1652 }
1653
1654 for (i = 0; i < (wuff_filter_count / 2); i++) {
1655 ret = smsc95xx_write_reg(dev, WUFF, crc[i]);
1656 if (ret < 0)
1657 goto done;
1658 }
1659
1660 /* clear any pending pattern match packet status */
1661 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1662 if (ret < 0)
1663 goto done;
1664
1665 val |= WUCSR_WUFR_;
1666
1667 ret = smsc95xx_write_reg(dev, WUCSR, val);
1668 if (ret < 0)
1669 goto done;
1670 }
1671
1672 if (pdata->wolopts & WAKE_MAGIC) {
1673 /* clear any pending magic packet status */
1674 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1675 if (ret < 0)
1676 goto done;
1677
1678 val |= WUCSR_MPR_;
1679
1680 ret = smsc95xx_write_reg(dev, WUCSR, val);
1681 if (ret < 0)
1682 goto done;
1683 }
1684
1685 /* enable/disable wakeup sources */
1686 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1687 if (ret < 0)
1688 goto done;
1689
1690 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1691 netdev_info(dev->net, "enabling pattern match wakeup\n");
1692 val |= WUCSR_WAKE_EN_;
1693 } else {
1694 netdev_info(dev->net, "disabling pattern match wakeup\n");
1695 val &= ~WUCSR_WAKE_EN_;
1696 }
1697
1698 if (pdata->wolopts & WAKE_MAGIC) {
1699 netdev_info(dev->net, "enabling magic packet wakeup\n");
1700 val |= WUCSR_MPEN_;
1701 } else {
1702 netdev_info(dev->net, "disabling magic packet wakeup\n");
1703 val &= ~WUCSR_MPEN_;
1704 }
1705
1706 ret = smsc95xx_write_reg(dev, WUCSR, val);
1707 if (ret < 0)
1708 goto done;
1709
1710 /* enable wol wakeup source */
1711 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1712 if (ret < 0)
1713 goto done;
1714
1715 val |= PM_CTL_WOL_EN_;
1716
1717 /* phy energy detect wakeup source */
1718 if (pdata->wolopts & WAKE_PHY)
1719 val |= PM_CTL_ED_EN_;
1720
1721 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1722 if (ret < 0)
1723 goto done;
1724
1725 /* enable receiver to enable frame reception */
1726 smsc95xx_start_rx_path(dev);
1727
1728 /* some wol options are enabled, so enter SUSPEND0 */
1729 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1730 ret = smsc95xx_enter_suspend0(dev);
1731
1732 done:
1733 /*
1734 * TODO: resume() might need to handle the suspend failure
1735 * in system sleep
1736 */
1737 if (ret && PMSG_IS_AUTO(message))
1738 usbnet_resume(intf);
1739
1740 pdata->pm_task = NULL;
1741 return ret;
1742 }
1743
1744 static int smsc95xx_resume(struct usb_interface *intf)
1745 {
1746 struct usbnet *dev = usb_get_intfdata(intf);
1747 struct smsc95xx_priv *pdata;
1748 u8 suspend_flags;
1749 int ret;
1750 u32 val;
1751
1752 BUG_ON(!dev);
1753 pdata = dev->driver_priv;
1754 suspend_flags = pdata->suspend_flags;
1755
1756 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1757
1758 /* do this first to ensure it's cleared even in error case */
1759 pdata->suspend_flags = 0;
1760
1761 pdata->pm_task = current;
1762
1763 if (suspend_flags & SUSPEND_ALLMODES) {
1764 /* clear wake-up sources */
1765 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1766 if (ret < 0)
1767 goto done;
1768
1769 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1770
1771 ret = smsc95xx_write_reg(dev, WUCSR, val);
1772 if (ret < 0)
1773 goto done;
1774
1775 /* clear wake-up status */
1776 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1777 if (ret < 0)
1778 goto done;
1779
1780 val &= ~PM_CTL_WOL_EN_;
1781 val |= PM_CTL_WUPS_;
1782
1783 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1784 if (ret < 0)
1785 goto done;
1786 }
1787
1788 phy_init_hw(pdata->phydev);
1789
1790 ret = usbnet_resume(intf);
1791 if (ret < 0)
1792 netdev_warn(dev->net, "usbnet_resume error\n");
1793
1794 done:
1795 pdata->pm_task = NULL;
1796 return ret;
1797 }
1798
1799 static int smsc95xx_reset_resume(struct usb_interface *intf)
1800 {
1801 struct usbnet *dev = usb_get_intfdata(intf);
1802 struct smsc95xx_priv *pdata = dev->driver_priv;
1803 int ret;
1804
1805 pdata->pm_task = current;
1806 ret = smsc95xx_reset(dev);
1807 pdata->pm_task = NULL;
1808 if (ret < 0)
1809 return ret;
1810
1811 return smsc95xx_resume(intf);
1812 }
1813
1814 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1815 {
1816 u16 *csum_ptr = (u16 *)(skb_tail_pointer(skb) - 2);
1817
1818 skb->csum = (__force __wsum)get_unaligned(csum_ptr);
1819 skb->ip_summed = CHECKSUM_COMPLETE;
1820 skb_trim(skb, skb->len - 2); /* remove csum */
1821 }
1822
1823 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1824 {
1825 /* This check is no longer done by usbnet */
1826 if (skb->len < dev->net->hard_header_len)
1827 return 0;
1828
1829 while (skb->len > 0) {
1830 u32 header, align_count;
1831 struct sk_buff *ax_skb;
1832 unsigned char *packet;
1833 u16 size;
1834
1835 header = get_unaligned_le32(skb->data);
1836 skb_pull(skb, 4 + NET_IP_ALIGN);
1837 packet = skb->data;
1838
1839 /* get the packet length */
1840 size = (u16)((header & RX_STS_FL_) >> 16);
1841 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1842
1843 if (unlikely(size > skb->len)) {
1844 netif_dbg(dev, rx_err, dev->net,
1845 "size err header=0x%08x\n", header);
1846 return 0;
1847 }
1848
1849 if (unlikely(header & RX_STS_ES_)) {
1850 netif_dbg(dev, rx_err, dev->net,
1851 "Error header=0x%08x\n", header);
1852 dev->net->stats.rx_errors++;
1853 dev->net->stats.rx_dropped++;
1854
1855 if (header & RX_STS_CRC_) {
1856 dev->net->stats.rx_crc_errors++;
1857 } else {
1858 if (header & (RX_STS_TL_ | RX_STS_RF_))
1859 dev->net->stats.rx_frame_errors++;
1860
1861 if ((header & RX_STS_LE_) &&
1862 (!(header & RX_STS_FT_)))
1863 dev->net->stats.rx_length_errors++;
1864 }
1865 } else {
1866 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1867 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1868 netif_dbg(dev, rx_err, dev->net,
1869 "size err header=0x%08x\n", header);
1870 return 0;
1871 }
1872
1873 /* last frame in this batch */
1874 if (skb->len == size) {
1875 if (dev->net->features & NETIF_F_RXCSUM)
1876 smsc95xx_rx_csum_offload(skb);
1877 skb_trim(skb, skb->len - 4); /* remove fcs */
1878
1879 return 1;
1880 }
1881
1882 ax_skb = netdev_alloc_skb_ip_align(dev->net, size);
1883 if (unlikely(!ax_skb)) {
1884 netdev_warn(dev->net, "Error allocating skb\n");
1885 return 0;
1886 }
1887
1888 skb_put(ax_skb, size);
1889 memcpy(ax_skb->data, packet, size);
1890
1891 if (dev->net->features & NETIF_F_RXCSUM)
1892 smsc95xx_rx_csum_offload(ax_skb);
1893 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1894
1895 usbnet_skb_return(dev, ax_skb);
1896 }
1897
1898 skb_pull(skb, size);
1899
1900 /* padding bytes before the next frame starts */
1901 if (skb->len)
1902 skb_pull(skb, align_count);
1903 }
1904
1905 return 1;
1906 }
1907
1908 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1909 {
1910 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1911 u16 high_16 = low_16 + skb->csum_offset;
1912 return (high_16 << 16) | low_16;
1913 }
1914
1915 /* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
1916 * transmission. This is fairly unlikely, only seems to trigger with some
1917 * short TCP ACK packets sent.
1918 *
1919 * Note, this calculation should probably check for the alignment of the
1920 * data as well, but a straight check for csum being in the last four bytes
1921 * of the packet should be ok for now.
1922 */
1923 static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
1924 {
1925 unsigned int len = skb->len - skb_checksum_start_offset(skb);
1926
1927 if (skb->len <= 45)
1928 return false;
1929 return skb->csum_offset < (len - (4 + 1));
1930 }
1931
1932 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1933 struct sk_buff *skb, gfp_t flags)
1934 {
1935 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1936 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1937 u32 tx_cmd_a, tx_cmd_b;
1938 void *ptr;
1939
1940 /* We do not advertise SG, so skbs should be already linearized */
1941 BUG_ON(skb_shinfo(skb)->nr_frags);
1942
1943 /* Make writable and expand header space by overhead if required */
1944 if (skb_cow_head(skb, overhead)) {
1945 /* Must deallocate here as returning NULL to indicate error
1946 * means the skb won't be deallocated in the caller.
1947 */
1948 dev_kfree_skb_any(skb);
1949 return NULL;
1950 }
1951
1952 tx_cmd_b = (u32)skb->len;
1953 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1954
1955 if (csum) {
1956 if (!smsc95xx_can_tx_checksum(skb)) {
1957 /* workaround - hardware tx checksum does not work
1958 * properly with extremely small packets */
1959 long csstart = skb_checksum_start_offset(skb);
1960 __wsum calc = csum_partial(skb->data + csstart,
1961 skb->len - csstart, 0);
1962 *((__sum16 *)(skb->data + csstart
1963 + skb->csum_offset)) = csum_fold(calc);
1964
1965 csum = false;
1966 } else {
1967 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1968 ptr = skb_push(skb, 4);
1969 put_unaligned_le32(csum_preamble, ptr);
1970
1971 tx_cmd_a += 4;
1972 tx_cmd_b += 4;
1973 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1974 }
1975 }
1976
1977 ptr = skb_push(skb, 8);
1978 put_unaligned_le32(tx_cmd_a, ptr);
1979 put_unaligned_le32(tx_cmd_b, ptr+4);
1980
1981 return skb;
1982 }
1983
1984 static int smsc95xx_manage_power(struct usbnet *dev, int on)
1985 {
1986 struct smsc95xx_priv *pdata = dev->driver_priv;
1987
1988 dev->intf->needs_remote_wakeup = on;
1989
1990 if (pdata->features & FEATURE_REMOTE_WAKEUP)
1991 return 0;
1992
1993 /* this chip revision isn't capable of remote wakeup */
1994 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1995
1996 if (on)
1997 usb_autopm_get_interface_no_resume(dev->intf);
1998 else
1999 usb_autopm_put_interface(dev->intf);
2000
2001 return 0;
2002 }
2003
2004 static const struct driver_info smsc95xx_info = {
2005 .description = "smsc95xx USB 2.0 Ethernet",
2006 .bind = smsc95xx_bind,
2007 .unbind = smsc95xx_unbind,
2008 .reset = smsc95xx_reset,
2009 .check_connect = smsc95xx_start_phy,
2010 .stop = smsc95xx_stop,
2011 .rx_fixup = smsc95xx_rx_fixup,
2012 .tx_fixup = smsc95xx_tx_fixup,
2013 .status = smsc95xx_status,
2014 .manage_power = smsc95xx_manage_power,
2015 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2016 };
2017
2018 static const struct usb_device_id products[] = {
2019 {
2020 /* SMSC9500 USB Ethernet Device */
2021 USB_DEVICE(0x0424, 0x9500),
2022 .driver_info = (unsigned long) &smsc95xx_info,
2023 },
2024 {
2025 /* SMSC9505 USB Ethernet Device */
2026 USB_DEVICE(0x0424, 0x9505),
2027 .driver_info = (unsigned long) &smsc95xx_info,
2028 },
2029 {
2030 /* SMSC9500A USB Ethernet Device */
2031 USB_DEVICE(0x0424, 0x9E00),
2032 .driver_info = (unsigned long) &smsc95xx_info,
2033 },
2034 {
2035 /* SMSC9505A USB Ethernet Device */
2036 USB_DEVICE(0x0424, 0x9E01),
2037 .driver_info = (unsigned long) &smsc95xx_info,
2038 },
2039 {
2040 /* SMSC9512/9514 USB Hub & Ethernet Device */
2041 USB_DEVICE(0x0424, 0xec00),
2042 .driver_info = (unsigned long) &smsc95xx_info,
2043 },
2044 {
2045 /* SMSC9500 USB Ethernet Device (SAL10) */
2046 USB_DEVICE(0x0424, 0x9900),
2047 .driver_info = (unsigned long) &smsc95xx_info,
2048 },
2049 {
2050 /* SMSC9505 USB Ethernet Device (SAL10) */
2051 USB_DEVICE(0x0424, 0x9901),
2052 .driver_info = (unsigned long) &smsc95xx_info,
2053 },
2054 {
2055 /* SMSC9500A USB Ethernet Device (SAL10) */
2056 USB_DEVICE(0x0424, 0x9902),
2057 .driver_info = (unsigned long) &smsc95xx_info,
2058 },
2059 {
2060 /* SMSC9505A USB Ethernet Device (SAL10) */
2061 USB_DEVICE(0x0424, 0x9903),
2062 .driver_info = (unsigned long) &smsc95xx_info,
2063 },
2064 {
2065 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2066 USB_DEVICE(0x0424, 0x9904),
2067 .driver_info = (unsigned long) &smsc95xx_info,
2068 },
2069 {
2070 /* SMSC9500A USB Ethernet Device (HAL) */
2071 USB_DEVICE(0x0424, 0x9905),
2072 .driver_info = (unsigned long) &smsc95xx_info,
2073 },
2074 {
2075 /* SMSC9505A USB Ethernet Device (HAL) */
2076 USB_DEVICE(0x0424, 0x9906),
2077 .driver_info = (unsigned long) &smsc95xx_info,
2078 },
2079 {
2080 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2081 USB_DEVICE(0x0424, 0x9907),
2082 .driver_info = (unsigned long) &smsc95xx_info,
2083 },
2084 {
2085 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2086 USB_DEVICE(0x0424, 0x9908),
2087 .driver_info = (unsigned long) &smsc95xx_info,
2088 },
2089 {
2090 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2091 USB_DEVICE(0x0424, 0x9909),
2092 .driver_info = (unsigned long) &smsc95xx_info,
2093 },
2094 {
2095 /* SMSC LAN9530 USB Ethernet Device */
2096 USB_DEVICE(0x0424, 0x9530),
2097 .driver_info = (unsigned long) &smsc95xx_info,
2098 },
2099 {
2100 /* SMSC LAN9730 USB Ethernet Device */
2101 USB_DEVICE(0x0424, 0x9730),
2102 .driver_info = (unsigned long) &smsc95xx_info,
2103 },
2104 {
2105 /* SMSC LAN89530 USB Ethernet Device */
2106 USB_DEVICE(0x0424, 0x9E08),
2107 .driver_info = (unsigned long) &smsc95xx_info,
2108 },
2109 {
2110 /* SYSTEC USB-SPEmodule1 10BASE-T1L Ethernet Device */
2111 USB_DEVICE(0x0878, 0x1400),
2112 .driver_info = (unsigned long)&smsc95xx_info,
2113 },
2114 {
2115 /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */
2116 USB_DEVICE(0x184F, 0x0051),
2117 .driver_info = (unsigned long)&smsc95xx_info,
2118 },
2119 { }, /* END */
2120 };
2121 MODULE_DEVICE_TABLE(usb, products);
2122
2123 static struct usb_driver smsc95xx_driver = {
2124 .name = "smsc95xx",
2125 .id_table = products,
2126 .probe = usbnet_probe,
2127 .suspend = smsc95xx_suspend,
2128 .resume = smsc95xx_resume,
2129 .reset_resume = smsc95xx_reset_resume,
2130 .disconnect = usbnet_disconnect,
2131 .disable_hub_initiated_lpm = 1,
2132 .supports_autosuspend = 1,
2133 };
2134
2135 module_usb_driver(smsc95xx_driver);
2136
2137 MODULE_AUTHOR("Nancy Lin");
2138 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2139 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2140 MODULE_LICENSE("GPL");
Kernel DRM miscellaneous fixes and cross-tree changes