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smsc75xx: fix error handling in suspend failure case
[deliverable/linux.git] / drivers / net / usb / smsc75xx.c
1 /***************************************************************************
2 *
3 * Copyright (C) 2007-2010 SMSC
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 *
19 *****************************************************************************/
20
21 #include <linux/module.h>
22 #include <linux/kmod.h>
23 #include <linux/init.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/mii.h>
28 #include <linux/usb.h>
29 #include <linux/bitrev.h>
30 #include <linux/crc16.h>
31 #include <linux/crc32.h>
32 #include <linux/usb/usbnet.h>
33 #include <linux/slab.h>
34 #include "smsc75xx.h"
35
36 #define SMSC_CHIPNAME "smsc75xx"
37 #define SMSC_DRIVER_VERSION "1.0.0"
38 #define HS_USB_PKT_SIZE (512)
39 #define FS_USB_PKT_SIZE (64)
40 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
41 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
42 #define DEFAULT_BULK_IN_DELAY (0x00002000)
43 #define MAX_SINGLE_PACKET_SIZE (9000)
44 #define LAN75XX_EEPROM_MAGIC (0x7500)
45 #define EEPROM_MAC_OFFSET (0x01)
46 #define DEFAULT_TX_CSUM_ENABLE (true)
47 #define DEFAULT_RX_CSUM_ENABLE (true)
48 #define DEFAULT_TSO_ENABLE (true)
49 #define SMSC75XX_INTERNAL_PHY_ID (1)
50 #define SMSC75XX_TX_OVERHEAD (8)
51 #define MAX_RX_FIFO_SIZE (20 * 1024)
52 #define MAX_TX_FIFO_SIZE (12 * 1024)
53 #define USB_VENDOR_ID_SMSC (0x0424)
54 #define USB_PRODUCT_ID_LAN7500 (0x7500)
55 #define USB_PRODUCT_ID_LAN7505 (0x7505)
56 #define RXW_PADDING 2
57 #define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
58 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
59
60 #define check_warn(ret, fmt, args...) \
61 ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
62
63 #define check_warn_return(ret, fmt, args...) \
64 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
65
66 #define check_warn_goto_done(ret, fmt, args...) \
67 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
68
69 struct smsc75xx_priv {
70 struct usbnet *dev;
71 u32 rfe_ctl;
72 u32 wolopts;
73 u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
74 struct mutex dataport_mutex;
75 spinlock_t rfe_ctl_lock;
76 struct work_struct set_multicast;
77 };
78
79 struct usb_context {
80 struct usb_ctrlrequest req;
81 struct usbnet *dev;
82 };
83
84 static bool turbo_mode = true;
85 module_param(turbo_mode, bool, 0644);
86 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
87
88 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
89 u32 *data, int in_pm)
90 {
91 u32 buf;
92 int ret;
93 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
94
95 BUG_ON(!dev);
96
97 if (!in_pm)
98 fn = usbnet_read_cmd;
99 else
100 fn = usbnet_read_cmd_nopm;
101
102 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
103 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
104 0, index, &buf, 4);
105 if (unlikely(ret < 0))
106 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
107 index, ret);
108
109 le32_to_cpus(&buf);
110 *data = buf;
111
112 return ret;
113 }
114
115 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
116 u32 data, int in_pm)
117 {
118 u32 buf;
119 int ret;
120 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
121
122 BUG_ON(!dev);
123
124 if (!in_pm)
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 (unlikely(ret < 0))
136 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
137 index, ret);
138
139 return ret;
140 }
141
142 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
143 u32 *data)
144 {
145 return __smsc75xx_read_reg(dev, index, data, 1);
146 }
147
148 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
149 u32 data)
150 {
151 return __smsc75xx_write_reg(dev, index, data, 1);
152 }
153
154 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
155 u32 *data)
156 {
157 return __smsc75xx_read_reg(dev, index, data, 0);
158 }
159
160 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
161 u32 data)
162 {
163 return __smsc75xx_write_reg(dev, index, data, 0);
164 }
165
166 static int smsc75xx_set_feature(struct usbnet *dev, u32 feature)
167 {
168 if (WARN_ON_ONCE(!dev))
169 return -EINVAL;
170
171 return usbnet_write_cmd_nopm(dev, USB_REQ_SET_FEATURE,
172 USB_DIR_OUT | USB_RECIP_DEVICE,
173 feature, 0, NULL, 0);
174 }
175
176 static int smsc75xx_clear_feature(struct usbnet *dev, u32 feature)
177 {
178 if (WARN_ON_ONCE(!dev))
179 return -EINVAL;
180
181 return usbnet_write_cmd_nopm(dev, USB_REQ_CLEAR_FEATURE,
182 USB_DIR_OUT | USB_RECIP_DEVICE,
183 feature, 0, NULL, 0);
184 }
185
186 /* Loop until the read is completed with timeout
187 * called with phy_mutex held */
188 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
189 int in_pm)
190 {
191 unsigned long start_time = jiffies;
192 u32 val;
193 int ret;
194
195 do {
196 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
197 check_warn_return(ret, "Error reading MII_ACCESS\n");
198
199 if (!(val & MII_ACCESS_BUSY))
200 return 0;
201 } while (!time_after(jiffies, start_time + HZ));
202
203 return -EIO;
204 }
205
206 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
207 int in_pm)
208 {
209 struct usbnet *dev = netdev_priv(netdev);
210 u32 val, addr;
211 int ret;
212
213 mutex_lock(&dev->phy_mutex);
214
215 /* confirm MII not busy */
216 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
217 check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read\n");
218
219 /* set the address, index & direction (read from PHY) */
220 phy_id &= dev->mii.phy_id_mask;
221 idx &= dev->mii.reg_num_mask;
222 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
223 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
224 | MII_ACCESS_READ | MII_ACCESS_BUSY;
225 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
226 check_warn_goto_done(ret, "Error writing MII_ACCESS\n");
227
228 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
229 check_warn_goto_done(ret, "Timed out reading MII reg %02X\n", idx);
230
231 ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
232 check_warn_goto_done(ret, "Error reading MII_DATA\n");
233
234 ret = (u16)(val & 0xFFFF);
235
236 done:
237 mutex_unlock(&dev->phy_mutex);
238 return ret;
239 }
240
241 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
242 int idx, int regval, int in_pm)
243 {
244 struct usbnet *dev = netdev_priv(netdev);
245 u32 val, addr;
246 int ret;
247
248 mutex_lock(&dev->phy_mutex);
249
250 /* confirm MII not busy */
251 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
252 check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write\n");
253
254 val = regval;
255 ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
256 check_warn_goto_done(ret, "Error writing MII_DATA\n");
257
258 /* set the address, index & direction (write to PHY) */
259 phy_id &= dev->mii.phy_id_mask;
260 idx &= dev->mii.reg_num_mask;
261 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
262 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
263 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
264 ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
265 check_warn_goto_done(ret, "Error writing MII_ACCESS\n");
266
267 ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
268 check_warn_goto_done(ret, "Timed out writing MII reg %02X\n", idx);
269
270 done:
271 mutex_unlock(&dev->phy_mutex);
272 }
273
274 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
275 int idx)
276 {
277 return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
278 }
279
280 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
281 int idx, int regval)
282 {
283 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
284 }
285
286 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
287 {
288 return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
289 }
290
291 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
292 int regval)
293 {
294 __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
295 }
296
297 static int smsc75xx_wait_eeprom(struct usbnet *dev)
298 {
299 unsigned long start_time = jiffies;
300 u32 val;
301 int ret;
302
303 do {
304 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
305 check_warn_return(ret, "Error reading E2P_CMD\n");
306
307 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
308 break;
309 udelay(40);
310 } while (!time_after(jiffies, start_time + HZ));
311
312 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
313 netdev_warn(dev->net, "EEPROM read operation timeout\n");
314 return -EIO;
315 }
316
317 return 0;
318 }
319
320 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
321 {
322 unsigned long start_time = jiffies;
323 u32 val;
324 int ret;
325
326 do {
327 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
328 check_warn_return(ret, "Error reading E2P_CMD\n");
329
330 if (!(val & E2P_CMD_BUSY))
331 return 0;
332
333 udelay(40);
334 } while (!time_after(jiffies, start_time + HZ));
335
336 netdev_warn(dev->net, "EEPROM is busy\n");
337 return -EIO;
338 }
339
340 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
341 u8 *data)
342 {
343 u32 val;
344 int i, ret;
345
346 BUG_ON(!dev);
347 BUG_ON(!data);
348
349 ret = smsc75xx_eeprom_confirm_not_busy(dev);
350 if (ret)
351 return ret;
352
353 for (i = 0; i < length; i++) {
354 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
355 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
356 check_warn_return(ret, "Error writing E2P_CMD\n");
357
358 ret = smsc75xx_wait_eeprom(dev);
359 if (ret < 0)
360 return ret;
361
362 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
363 check_warn_return(ret, "Error reading E2P_DATA\n");
364
365 data[i] = val & 0xFF;
366 offset++;
367 }
368
369 return 0;
370 }
371
372 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
373 u8 *data)
374 {
375 u32 val;
376 int i, ret;
377
378 BUG_ON(!dev);
379 BUG_ON(!data);
380
381 ret = smsc75xx_eeprom_confirm_not_busy(dev);
382 if (ret)
383 return ret;
384
385 /* Issue write/erase enable command */
386 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
387 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
388 check_warn_return(ret, "Error writing E2P_CMD\n");
389
390 ret = smsc75xx_wait_eeprom(dev);
391 if (ret < 0)
392 return ret;
393
394 for (i = 0; i < length; i++) {
395
396 /* Fill data register */
397 val = data[i];
398 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
399 check_warn_return(ret, "Error writing E2P_DATA\n");
400
401 /* Send "write" command */
402 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
403 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
404 check_warn_return(ret, "Error writing E2P_CMD\n");
405
406 ret = smsc75xx_wait_eeprom(dev);
407 if (ret < 0)
408 return ret;
409
410 offset++;
411 }
412
413 return 0;
414 }
415
416 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
417 {
418 int i, ret;
419
420 for (i = 0; i < 100; i++) {
421 u32 dp_sel;
422 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
423 check_warn_return(ret, "Error reading DP_SEL\n");
424
425 if (dp_sel & DP_SEL_DPRDY)
426 return 0;
427
428 udelay(40);
429 }
430
431 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
432
433 return -EIO;
434 }
435
436 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
437 u32 length, u32 *buf)
438 {
439 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
440 u32 dp_sel;
441 int i, ret;
442
443 mutex_lock(&pdata->dataport_mutex);
444
445 ret = smsc75xx_dataport_wait_not_busy(dev);
446 check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry\n");
447
448 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
449 check_warn_goto_done(ret, "Error reading DP_SEL\n");
450
451 dp_sel &= ~DP_SEL_RSEL;
452 dp_sel |= ram_select;
453 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
454 check_warn_goto_done(ret, "Error writing DP_SEL\n");
455
456 for (i = 0; i < length; i++) {
457 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
458 check_warn_goto_done(ret, "Error writing DP_ADDR\n");
459
460 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
461 check_warn_goto_done(ret, "Error writing DP_DATA\n");
462
463 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
464 check_warn_goto_done(ret, "Error writing DP_CMD\n");
465
466 ret = smsc75xx_dataport_wait_not_busy(dev);
467 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout\n");
468 }
469
470 done:
471 mutex_unlock(&pdata->dataport_mutex);
472 return ret;
473 }
474
475 /* returns hash bit number for given MAC address */
476 static u32 smsc75xx_hash(char addr[ETH_ALEN])
477 {
478 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
479 }
480
481 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
482 {
483 struct smsc75xx_priv *pdata =
484 container_of(param, struct smsc75xx_priv, set_multicast);
485 struct usbnet *dev = pdata->dev;
486 int ret;
487
488 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
489 pdata->rfe_ctl);
490
491 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
492 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
493
494 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
495 check_warn(ret, "Error writing RFE_CRL\n");
496 }
497
498 static void smsc75xx_set_multicast(struct net_device *netdev)
499 {
500 struct usbnet *dev = netdev_priv(netdev);
501 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
502 unsigned long flags;
503 int i;
504
505 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
506
507 pdata->rfe_ctl &=
508 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
509 pdata->rfe_ctl |= RFE_CTL_AB;
510
511 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
512 pdata->multicast_hash_table[i] = 0;
513
514 if (dev->net->flags & IFF_PROMISC) {
515 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
516 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
517 } else if (dev->net->flags & IFF_ALLMULTI) {
518 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
519 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
520 } else if (!netdev_mc_empty(dev->net)) {
521 struct netdev_hw_addr *ha;
522
523 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
524
525 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
526
527 netdev_for_each_mc_addr(ha, netdev) {
528 u32 bitnum = smsc75xx_hash(ha->addr);
529 pdata->multicast_hash_table[bitnum / 32] |=
530 (1 << (bitnum % 32));
531 }
532 } else {
533 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
534 pdata->rfe_ctl |= RFE_CTL_DPF;
535 }
536
537 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
538
539 /* defer register writes to a sleepable context */
540 schedule_work(&pdata->set_multicast);
541 }
542
543 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
544 u16 lcladv, u16 rmtadv)
545 {
546 u32 flow = 0, fct_flow = 0;
547 int ret;
548
549 if (duplex == DUPLEX_FULL) {
550 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
551
552 if (cap & FLOW_CTRL_TX) {
553 flow = (FLOW_TX_FCEN | 0xFFFF);
554 /* set fct_flow thresholds to 20% and 80% */
555 fct_flow = (8 << 8) | 32;
556 }
557
558 if (cap & FLOW_CTRL_RX)
559 flow |= FLOW_RX_FCEN;
560
561 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
562 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
563 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
564 } else {
565 netif_dbg(dev, link, dev->net, "half duplex\n");
566 }
567
568 ret = smsc75xx_write_reg(dev, FLOW, flow);
569 check_warn_return(ret, "Error writing FLOW\n");
570
571 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
572 check_warn_return(ret, "Error writing FCT_FLOW\n");
573
574 return 0;
575 }
576
577 static int smsc75xx_link_reset(struct usbnet *dev)
578 {
579 struct mii_if_info *mii = &dev->mii;
580 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
581 u16 lcladv, rmtadv;
582 int ret;
583
584 /* write to clear phy interrupt status */
585 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
586 PHY_INT_SRC_CLEAR_ALL);
587
588 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
589 check_warn_return(ret, "Error writing INT_STS\n");
590
591 mii_check_media(mii, 1, 1);
592 mii_ethtool_gset(&dev->mii, &ecmd);
593 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
594 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
595
596 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
597 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
598
599 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
600 }
601
602 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
603 {
604 u32 intdata;
605
606 if (urb->actual_length != 4) {
607 netdev_warn(dev->net, "unexpected urb length %d\n",
608 urb->actual_length);
609 return;
610 }
611
612 memcpy(&intdata, urb->transfer_buffer, 4);
613 le32_to_cpus(&intdata);
614
615 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
616
617 if (intdata & INT_ENP_PHY_INT)
618 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
619 else
620 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
621 intdata);
622 }
623
624 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
625 {
626 return MAX_EEPROM_SIZE;
627 }
628
629 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
630 struct ethtool_eeprom *ee, u8 *data)
631 {
632 struct usbnet *dev = netdev_priv(netdev);
633
634 ee->magic = LAN75XX_EEPROM_MAGIC;
635
636 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
637 }
638
639 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
640 struct ethtool_eeprom *ee, u8 *data)
641 {
642 struct usbnet *dev = netdev_priv(netdev);
643
644 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
645 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
646 ee->magic);
647 return -EINVAL;
648 }
649
650 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
651 }
652
653 static void smsc75xx_ethtool_get_wol(struct net_device *net,
654 struct ethtool_wolinfo *wolinfo)
655 {
656 struct usbnet *dev = netdev_priv(net);
657 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
658
659 wolinfo->supported = SUPPORTED_WAKE;
660 wolinfo->wolopts = pdata->wolopts;
661 }
662
663 static int smsc75xx_ethtool_set_wol(struct net_device *net,
664 struct ethtool_wolinfo *wolinfo)
665 {
666 struct usbnet *dev = netdev_priv(net);
667 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
668
669 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
670 return 0;
671 }
672
673 static const struct ethtool_ops smsc75xx_ethtool_ops = {
674 .get_link = usbnet_get_link,
675 .nway_reset = usbnet_nway_reset,
676 .get_drvinfo = usbnet_get_drvinfo,
677 .get_msglevel = usbnet_get_msglevel,
678 .set_msglevel = usbnet_set_msglevel,
679 .get_settings = usbnet_get_settings,
680 .set_settings = usbnet_set_settings,
681 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
682 .get_eeprom = smsc75xx_ethtool_get_eeprom,
683 .set_eeprom = smsc75xx_ethtool_set_eeprom,
684 .get_wol = smsc75xx_ethtool_get_wol,
685 .set_wol = smsc75xx_ethtool_set_wol,
686 };
687
688 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
689 {
690 struct usbnet *dev = netdev_priv(netdev);
691
692 if (!netif_running(netdev))
693 return -EINVAL;
694
695 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
696 }
697
698 static void smsc75xx_init_mac_address(struct usbnet *dev)
699 {
700 /* try reading mac address from EEPROM */
701 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
702 dev->net->dev_addr) == 0) {
703 if (is_valid_ether_addr(dev->net->dev_addr)) {
704 /* eeprom values are valid so use them */
705 netif_dbg(dev, ifup, dev->net,
706 "MAC address read from EEPROM\n");
707 return;
708 }
709 }
710
711 /* no eeprom, or eeprom values are invalid. generate random MAC */
712 eth_hw_addr_random(dev->net);
713 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
714 }
715
716 static int smsc75xx_set_mac_address(struct usbnet *dev)
717 {
718 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
719 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
720 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
721
722 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
723 check_warn_return(ret, "Failed to write RX_ADDRH: %d\n", ret);
724
725 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
726 check_warn_return(ret, "Failed to write RX_ADDRL: %d\n", ret);
727
728 addr_hi |= ADDR_FILTX_FB_VALID;
729 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
730 check_warn_return(ret, "Failed to write ADDR_FILTX: %d\n", ret);
731
732 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
733 check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d\n", ret);
734
735 return 0;
736 }
737
738 static int smsc75xx_phy_initialize(struct usbnet *dev)
739 {
740 int bmcr, ret, timeout = 0;
741
742 /* Initialize MII structure */
743 dev->mii.dev = dev->net;
744 dev->mii.mdio_read = smsc75xx_mdio_read;
745 dev->mii.mdio_write = smsc75xx_mdio_write;
746 dev->mii.phy_id_mask = 0x1f;
747 dev->mii.reg_num_mask = 0x1f;
748 dev->mii.supports_gmii = 1;
749 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
750
751 /* reset phy and wait for reset to complete */
752 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
753
754 do {
755 msleep(10);
756 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
757 check_warn_return(bmcr, "Error reading MII_BMCR\n");
758 timeout++;
759 } while ((bmcr & BMCR_RESET) && (timeout < 100));
760
761 if (timeout >= 100) {
762 netdev_warn(dev->net, "timeout on PHY Reset\n");
763 return -EIO;
764 }
765
766 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
767 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
768 ADVERTISE_PAUSE_ASYM);
769 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
770 ADVERTISE_1000FULL);
771
772 /* read and write to clear phy interrupt status */
773 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
774 check_warn_return(ret, "Error reading PHY_INT_SRC\n");
775 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
776
777 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
778 PHY_INT_MASK_DEFAULT);
779 mii_nway_restart(&dev->mii);
780
781 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
782 return 0;
783 }
784
785 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
786 {
787 int ret = 0;
788 u32 buf;
789 bool rxenabled;
790
791 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
792 check_warn_return(ret, "Failed to read MAC_RX: %d\n", ret);
793
794 rxenabled = ((buf & MAC_RX_RXEN) != 0);
795
796 if (rxenabled) {
797 buf &= ~MAC_RX_RXEN;
798 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
799 check_warn_return(ret, "Failed to write MAC_RX: %d\n", ret);
800 }
801
802 /* add 4 to size for FCS */
803 buf &= ~MAC_RX_MAX_SIZE;
804 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
805
806 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
807 check_warn_return(ret, "Failed to write MAC_RX: %d\n", ret);
808
809 if (rxenabled) {
810 buf |= MAC_RX_RXEN;
811 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
812 check_warn_return(ret, "Failed to write MAC_RX: %d\n", ret);
813 }
814
815 return 0;
816 }
817
818 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
819 {
820 struct usbnet *dev = netdev_priv(netdev);
821
822 int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
823 check_warn_return(ret, "Failed to set mac rx frame length\n");
824
825 return usbnet_change_mtu(netdev, new_mtu);
826 }
827
828 /* Enable or disable Rx checksum offload engine */
829 static int smsc75xx_set_features(struct net_device *netdev,
830 netdev_features_t features)
831 {
832 struct usbnet *dev = netdev_priv(netdev);
833 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
834 unsigned long flags;
835 int ret;
836
837 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
838
839 if (features & NETIF_F_RXCSUM)
840 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
841 else
842 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
843
844 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
845 /* it's racing here! */
846
847 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
848 check_warn_return(ret, "Error writing RFE_CTL\n");
849
850 return 0;
851 }
852
853 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
854 {
855 int timeout = 0;
856
857 do {
858 u32 buf;
859 int ret;
860
861 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
862
863 check_warn_return(ret, "Failed to read PMT_CTL: %d\n", ret);
864
865 if (buf & PMT_CTL_DEV_RDY)
866 return 0;
867
868 msleep(10);
869 timeout++;
870 } while (timeout < 100);
871
872 netdev_warn(dev->net, "timeout waiting for device ready\n");
873 return -EIO;
874 }
875
876 static int smsc75xx_reset(struct usbnet *dev)
877 {
878 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
879 u32 buf;
880 int ret = 0, timeout;
881
882 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
883
884 ret = smsc75xx_wait_ready(dev, 0);
885 check_warn_return(ret, "device not ready in smsc75xx_reset\n");
886
887 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
888 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
889
890 buf |= HW_CFG_LRST;
891
892 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
893 check_warn_return(ret, "Failed to write HW_CFG: %d\n", ret);
894
895 timeout = 0;
896 do {
897 msleep(10);
898 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
899 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
900 timeout++;
901 } while ((buf & HW_CFG_LRST) && (timeout < 100));
902
903 if (timeout >= 100) {
904 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
905 return -EIO;
906 }
907
908 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
909
910 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
911 check_warn_return(ret, "Failed to read PMT_CTL: %d\n", ret);
912
913 buf |= PMT_CTL_PHY_RST;
914
915 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
916 check_warn_return(ret, "Failed to write PMT_CTL: %d\n", ret);
917
918 timeout = 0;
919 do {
920 msleep(10);
921 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
922 check_warn_return(ret, "Failed to read PMT_CTL: %d\n", ret);
923 timeout++;
924 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
925
926 if (timeout >= 100) {
927 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
928 return -EIO;
929 }
930
931 netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
932
933 smsc75xx_init_mac_address(dev);
934
935 ret = smsc75xx_set_mac_address(dev);
936 check_warn_return(ret, "Failed to set mac address\n");
937
938 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
939 dev->net->dev_addr);
940
941 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
942 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
943
944 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
945 buf);
946
947 buf |= HW_CFG_BIR;
948
949 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
950 check_warn_return(ret, "Failed to write HW_CFG: %d\n", ret);
951
952 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
953 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
954
955 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
956 buf);
957
958 if (!turbo_mode) {
959 buf = 0;
960 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
961 } else if (dev->udev->speed == USB_SPEED_HIGH) {
962 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
963 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
964 } else {
965 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
966 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
967 }
968
969 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
970 (ulong)dev->rx_urb_size);
971
972 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
973 check_warn_return(ret, "Failed to write BURST_CAP: %d\n", ret);
974
975 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
976 check_warn_return(ret, "Failed to read BURST_CAP: %d\n", ret);
977
978 netif_dbg(dev, ifup, dev->net,
979 "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
980
981 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
982 check_warn_return(ret, "Failed to write BULK_IN_DLY: %d\n", ret);
983
984 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
985 check_warn_return(ret, "Failed to read BULK_IN_DLY: %d\n", ret);
986
987 netif_dbg(dev, ifup, dev->net,
988 "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
989
990 if (turbo_mode) {
991 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
992 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
993
994 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
995
996 buf |= (HW_CFG_MEF | HW_CFG_BCE);
997
998 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
999 check_warn_return(ret, "Failed to write HW_CFG: %d\n", ret);
1000
1001 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1002 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
1003
1004 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1005 }
1006
1007 /* set FIFO sizes */
1008 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1009 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1010 check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1011
1012 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1013
1014 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1015 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1016 check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1017
1018 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1019
1020 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1021 check_warn_return(ret, "Failed to write INT_STS: %d\n", ret);
1022
1023 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1024 check_warn_return(ret, "Failed to read ID_REV: %d\n", ret);
1025
1026 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1027
1028 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1029 check_warn_return(ret, "Failed to read E2P_CMD: %d\n", ret);
1030
1031 /* only set default GPIO/LED settings if no EEPROM is detected */
1032 if (!(buf & E2P_CMD_LOADED)) {
1033 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1034 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d\n",
1035 ret);
1036
1037 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1038 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1039
1040 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1041 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d\n",
1042 ret);
1043 }
1044
1045 ret = smsc75xx_write_reg(dev, FLOW, 0);
1046 check_warn_return(ret, "Failed to write FLOW: %d\n", ret);
1047
1048 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1049 check_warn_return(ret, "Failed to write FCT_FLOW: %d\n", ret);
1050
1051 /* Don't need rfe_ctl_lock during initialisation */
1052 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1053 check_warn_return(ret, "Failed to read RFE_CTL: %d\n", ret);
1054
1055 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1056
1057 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1058 check_warn_return(ret, "Failed to write RFE_CTL: %d\n", ret);
1059
1060 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1061 check_warn_return(ret, "Failed to read RFE_CTL: %d\n", ret);
1062
1063 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1064 pdata->rfe_ctl);
1065
1066 /* Enable or disable checksum offload engines */
1067 smsc75xx_set_features(dev->net, dev->net->features);
1068
1069 smsc75xx_set_multicast(dev->net);
1070
1071 ret = smsc75xx_phy_initialize(dev);
1072 check_warn_return(ret, "Failed to initialize PHY: %d\n", ret);
1073
1074 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1075 check_warn_return(ret, "Failed to read INT_EP_CTL: %d\n", ret);
1076
1077 /* enable PHY interrupts */
1078 buf |= INT_ENP_PHY_INT;
1079
1080 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1081 check_warn_return(ret, "Failed to write INT_EP_CTL: %d\n", ret);
1082
1083 /* allow mac to detect speed and duplex from phy */
1084 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1085 check_warn_return(ret, "Failed to read MAC_CR: %d\n", ret);
1086
1087 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1088 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1089 check_warn_return(ret, "Failed to write MAC_CR: %d\n", ret);
1090
1091 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1092 check_warn_return(ret, "Failed to read MAC_TX: %d\n", ret);
1093
1094 buf |= MAC_TX_TXEN;
1095
1096 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1097 check_warn_return(ret, "Failed to write MAC_TX: %d\n", ret);
1098
1099 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1100
1101 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1102 check_warn_return(ret, "Failed to read FCT_TX_CTL: %d\n", ret);
1103
1104 buf |= FCT_TX_CTL_EN;
1105
1106 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1107 check_warn_return(ret, "Failed to write FCT_TX_CTL: %d\n", ret);
1108
1109 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1110
1111 ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1112 check_warn_return(ret, "Failed to set max rx frame length\n");
1113
1114 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1115 check_warn_return(ret, "Failed to read MAC_RX: %d\n", ret);
1116
1117 buf |= MAC_RX_RXEN;
1118
1119 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1120 check_warn_return(ret, "Failed to write MAC_RX: %d\n", ret);
1121
1122 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1123
1124 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1125 check_warn_return(ret, "Failed to read FCT_RX_CTL: %d\n", ret);
1126
1127 buf |= FCT_RX_CTL_EN;
1128
1129 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1130 check_warn_return(ret, "Failed to write FCT_RX_CTL: %d\n", ret);
1131
1132 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1133
1134 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1135 return 0;
1136 }
1137
1138 static const struct net_device_ops smsc75xx_netdev_ops = {
1139 .ndo_open = usbnet_open,
1140 .ndo_stop = usbnet_stop,
1141 .ndo_start_xmit = usbnet_start_xmit,
1142 .ndo_tx_timeout = usbnet_tx_timeout,
1143 .ndo_change_mtu = smsc75xx_change_mtu,
1144 .ndo_set_mac_address = eth_mac_addr,
1145 .ndo_validate_addr = eth_validate_addr,
1146 .ndo_do_ioctl = smsc75xx_ioctl,
1147 .ndo_set_rx_mode = smsc75xx_set_multicast,
1148 .ndo_set_features = smsc75xx_set_features,
1149 };
1150
1151 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1152 {
1153 struct smsc75xx_priv *pdata = NULL;
1154 int ret;
1155
1156 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1157
1158 ret = usbnet_get_endpoints(dev, intf);
1159 check_warn_return(ret, "usbnet_get_endpoints failed: %d\n", ret);
1160
1161 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1162 GFP_KERNEL);
1163
1164 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1165 if (!pdata) {
1166 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv\n");
1167 return -ENOMEM;
1168 }
1169
1170 pdata->dev = dev;
1171
1172 spin_lock_init(&pdata->rfe_ctl_lock);
1173 mutex_init(&pdata->dataport_mutex);
1174
1175 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1176
1177 if (DEFAULT_TX_CSUM_ENABLE) {
1178 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1179 if (DEFAULT_TSO_ENABLE)
1180 dev->net->features |= NETIF_F_SG |
1181 NETIF_F_TSO | NETIF_F_TSO6;
1182 }
1183 if (DEFAULT_RX_CSUM_ENABLE)
1184 dev->net->features |= NETIF_F_RXCSUM;
1185
1186 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1187 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1188
1189 /* Init all registers */
1190 ret = smsc75xx_reset(dev);
1191 check_warn_return(ret, "smsc75xx_reset error %d\n", ret);
1192
1193 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1194 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1195 dev->net->flags |= IFF_MULTICAST;
1196 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1197 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1198 return 0;
1199 }
1200
1201 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1202 {
1203 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1204 if (pdata) {
1205 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1206 kfree(pdata);
1207 pdata = NULL;
1208 dev->data[0] = 0;
1209 }
1210 }
1211
1212 static u16 smsc_crc(const u8 *buffer, size_t len)
1213 {
1214 return bitrev16(crc16(0xFFFF, buffer, len));
1215 }
1216
1217 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1218 u32 wuf_mask1)
1219 {
1220 int cfg_base = WUF_CFGX + filter * 4;
1221 int mask_base = WUF_MASKX + filter * 16;
1222 int ret;
1223
1224 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1225 check_warn_return(ret, "Error writing WUF_CFGX\n");
1226
1227 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1228 check_warn_return(ret, "Error writing WUF_MASKX\n");
1229
1230 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1231 check_warn_return(ret, "Error writing WUF_MASKX\n");
1232
1233 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1234 check_warn_return(ret, "Error writing WUF_MASKX\n");
1235
1236 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1237 check_warn_return(ret, "Error writing WUF_MASKX\n");
1238
1239 return 0;
1240 }
1241
1242 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1243 {
1244 u32 val;
1245 int ret;
1246
1247 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1248 check_warn_return(ret, "Error reading PMT_CTL\n");
1249
1250 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1251 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1252
1253 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1254 check_warn_return(ret, "Error writing PMT_CTL\n");
1255
1256 smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1257
1258 return 0;
1259 }
1260
1261 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1262 {
1263 u32 val;
1264 int ret;
1265
1266 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1267 check_warn_return(ret, "Error reading PMT_CTL\n");
1268
1269 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1270 val |= PMT_CTL_SUS_MODE_1;
1271
1272 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1273 check_warn_return(ret, "Error writing PMT_CTL\n");
1274
1275 /* clear wol status, enable energy detection */
1276 val &= ~PMT_CTL_WUPS;
1277 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1278
1279 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1280 check_warn_return(ret, "Error writing PMT_CTL\n");
1281
1282 smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1283
1284 return 0;
1285 }
1286
1287 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1288 {
1289 u32 val;
1290 int ret;
1291
1292 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1293 check_warn_return(ret, "Error reading PMT_CTL\n");
1294
1295 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1296 val |= PMT_CTL_SUS_MODE_2;
1297
1298 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1299 check_warn_return(ret, "Error writing PMT_CTL\n");
1300
1301 return 0;
1302 }
1303
1304 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1305 {
1306 struct mii_if_info *mii = &dev->mii;
1307 int ret;
1308
1309 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1310
1311 /* read to clear */
1312 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1313 check_warn_return(ret, "Error reading PHY_INT_SRC\n");
1314
1315 /* enable interrupt source */
1316 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1317 check_warn_return(ret, "Error reading PHY_INT_MASK\n");
1318
1319 ret |= mask;
1320
1321 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1322
1323 return 0;
1324 }
1325
1326 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1327 {
1328 struct mii_if_info *mii = &dev->mii;
1329 int ret;
1330
1331 /* first, a dummy read, needed to latch some MII phys */
1332 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1333 check_warn_return(ret, "Error reading MII_BMSR\n");
1334
1335 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1336 check_warn_return(ret, "Error reading MII_BMSR\n");
1337
1338 return !!(ret & BMSR_LSTATUS);
1339 }
1340
1341 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1342 {
1343 struct usbnet *dev = usb_get_intfdata(intf);
1344 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1345 u32 val, link_up;
1346 int ret;
1347
1348 ret = usbnet_suspend(intf, message);
1349 check_warn_goto_done(ret, "usbnet_suspend error\n");
1350
1351 /* determine if link is up using only _nopm functions */
1352 link_up = smsc75xx_link_ok_nopm(dev);
1353
1354 /* if no wol options set, or if link is down and we're not waking on
1355 * PHY activity, enter lowest power SUSPEND2 mode
1356 */
1357 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1358 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1359 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1360
1361 /* disable energy detect (link up) & wake up events */
1362 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1363 check_warn_goto_done(ret, "Error reading WUCSR\n");
1364
1365 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1366
1367 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1368 check_warn_goto_done(ret, "Error writing WUCSR\n");
1369
1370 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1371 check_warn_goto_done(ret, "Error reading PMT_CTL\n");
1372
1373 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1374
1375 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1376 check_warn_goto_done(ret, "Error writing PMT_CTL\n");
1377
1378 ret = smsc75xx_enter_suspend2(dev);
1379 goto done;
1380 }
1381
1382 if (pdata->wolopts & WAKE_PHY) {
1383 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1384 (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1385 check_warn_goto_done(ret, "error enabling PHY wakeup ints\n");
1386
1387 /* if link is down then configure EDPD and enter SUSPEND1,
1388 * otherwise enter SUSPEND0 below
1389 */
1390 if (!link_up) {
1391 struct mii_if_info *mii = &dev->mii;
1392 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1393
1394 /* enable energy detect power-down mode */
1395 ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1396 PHY_MODE_CTRL_STS);
1397 check_warn_goto_done(ret, "Error reading PHY_MODE_CTRL_STS\n");
1398
1399 ret |= MODE_CTRL_STS_EDPWRDOWN;
1400
1401 smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1402 PHY_MODE_CTRL_STS, ret);
1403
1404 /* enter SUSPEND1 mode */
1405 ret = smsc75xx_enter_suspend1(dev);
1406 goto done;
1407 }
1408 }
1409
1410 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1411 int i, filter = 0;
1412
1413 /* disable all filters */
1414 for (i = 0; i < WUF_NUM; i++) {
1415 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1416 check_warn_goto_done(ret, "Error writing WUF_CFGX\n");
1417 }
1418
1419 if (pdata->wolopts & WAKE_MCAST) {
1420 const u8 mcast[] = {0x01, 0x00, 0x5E};
1421 netdev_info(dev->net, "enabling multicast detection\n");
1422
1423 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1424 | smsc_crc(mcast, 3);
1425 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1426 check_warn_goto_done(ret, "Error writing wakeup filter\n");
1427 }
1428
1429 if (pdata->wolopts & WAKE_ARP) {
1430 const u8 arp[] = {0x08, 0x06};
1431 netdev_info(dev->net, "enabling ARP detection\n");
1432
1433 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1434 | smsc_crc(arp, 2);
1435 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1436 check_warn_goto_done(ret, "Error writing wakeup filter\n");
1437 }
1438
1439 /* clear any pending pattern match packet status */
1440 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1441 check_warn_goto_done(ret, "Error reading WUCSR\n");
1442
1443 val |= WUCSR_WUFR;
1444
1445 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1446 check_warn_goto_done(ret, "Error writing WUCSR\n");
1447
1448 netdev_info(dev->net, "enabling packet match detection\n");
1449 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1450 check_warn_goto_done(ret, "Error reading WUCSR\n");
1451
1452 val |= WUCSR_WUEN;
1453
1454 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1455 check_warn_goto_done(ret, "Error writing WUCSR\n");
1456 } else {
1457 netdev_info(dev->net, "disabling packet match detection\n");
1458 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1459 check_warn_goto_done(ret, "Error reading WUCSR\n");
1460
1461 val &= ~WUCSR_WUEN;
1462
1463 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1464 check_warn_goto_done(ret, "Error writing WUCSR\n");
1465 }
1466
1467 /* disable magic, bcast & unicast wakeup sources */
1468 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1469 check_warn_goto_done(ret, "Error reading WUCSR\n");
1470
1471 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1472
1473 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1474 check_warn_goto_done(ret, "Error writing WUCSR\n");
1475
1476 if (pdata->wolopts & WAKE_PHY) {
1477 netdev_info(dev->net, "enabling PHY wakeup\n");
1478
1479 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1480 check_warn_goto_done(ret, "Error reading PMT_CTL\n");
1481
1482 /* clear wol status, enable energy detection */
1483 val &= ~PMT_CTL_WUPS;
1484 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1485
1486 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1487 check_warn_goto_done(ret, "Error writing PMT_CTL\n");
1488 }
1489
1490 if (pdata->wolopts & WAKE_MAGIC) {
1491 netdev_info(dev->net, "enabling magic packet wakeup\n");
1492 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1493 check_warn_goto_done(ret, "Error reading WUCSR\n");
1494
1495 /* clear any pending magic packet status */
1496 val |= WUCSR_MPR | WUCSR_MPEN;
1497
1498 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1499 check_warn_goto_done(ret, "Error writing WUCSR\n");
1500 }
1501
1502 if (pdata->wolopts & WAKE_BCAST) {
1503 netdev_info(dev->net, "enabling broadcast detection\n");
1504 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1505 check_warn_goto_done(ret, "Error reading WUCSR\n");
1506
1507 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1508
1509 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1510 check_warn_goto_done(ret, "Error writing WUCSR\n");
1511 }
1512
1513 if (pdata->wolopts & WAKE_UCAST) {
1514 netdev_info(dev->net, "enabling unicast detection\n");
1515 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1516 check_warn_goto_done(ret, "Error reading WUCSR\n");
1517
1518 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1519
1520 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1521 check_warn_goto_done(ret, "Error writing WUCSR\n");
1522 }
1523
1524 /* enable receiver to enable frame reception */
1525 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1526 check_warn_goto_done(ret, "Failed to read MAC_RX: %d\n", ret);
1527
1528 val |= MAC_RX_RXEN;
1529
1530 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
1531 check_warn_goto_done(ret, "Failed to write MAC_RX: %d\n", ret);
1532
1533 /* some wol options are enabled, so enter SUSPEND0 */
1534 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1535 ret = smsc75xx_enter_suspend0(dev);
1536
1537 done:
1538 if (ret)
1539 usbnet_resume(intf);
1540 return ret;
1541 }
1542
1543 static int smsc75xx_resume(struct usb_interface *intf)
1544 {
1545 struct usbnet *dev = usb_get_intfdata(intf);
1546 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1547 int ret;
1548 u32 val;
1549
1550 if (pdata->wolopts) {
1551 netdev_info(dev->net, "resuming from SUSPEND0\n");
1552
1553 smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1554
1555 /* Disable wakeup sources */
1556 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1557 check_warn_return(ret, "Error reading WUCSR\n");
1558
1559 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
1560 | WUCSR_BCST_EN);
1561
1562 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1563 check_warn_return(ret, "Error writing WUCSR\n");
1564
1565 /* clear wake-up status */
1566 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1567 check_warn_return(ret, "Error reading PMT_CTL\n");
1568
1569 val &= ~PMT_CTL_WOL_EN;
1570 val |= PMT_CTL_WUPS;
1571
1572 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1573 check_warn_return(ret, "Error writing PMT_CTL\n");
1574 } else {
1575 netdev_info(dev->net, "resuming from SUSPEND2\n");
1576
1577 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1578 check_warn_return(ret, "Error reading PMT_CTL\n");
1579
1580 val |= PMT_CTL_PHY_PWRUP;
1581
1582 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1583 check_warn_return(ret, "Error writing PMT_CTL\n");
1584 }
1585
1586 ret = smsc75xx_wait_ready(dev, 1);
1587 check_warn_return(ret, "device not ready in smsc75xx_resume\n");
1588
1589 return usbnet_resume(intf);
1590 }
1591
1592 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
1593 u32 rx_cmd_a, u32 rx_cmd_b)
1594 {
1595 if (!(dev->net->features & NETIF_F_RXCSUM) ||
1596 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1597 skb->ip_summed = CHECKSUM_NONE;
1598 } else {
1599 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1600 skb->ip_summed = CHECKSUM_COMPLETE;
1601 }
1602 }
1603
1604 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1605 {
1606 while (skb->len > 0) {
1607 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1608 struct sk_buff *ax_skb;
1609 unsigned char *packet;
1610
1611 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1612 le32_to_cpus(&rx_cmd_a);
1613 skb_pull(skb, 4);
1614
1615 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1616 le32_to_cpus(&rx_cmd_b);
1617 skb_pull(skb, 4 + RXW_PADDING);
1618
1619 packet = skb->data;
1620
1621 /* get the packet length */
1622 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
1623 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
1624
1625 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1626 netif_dbg(dev, rx_err, dev->net,
1627 "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
1628 dev->net->stats.rx_errors++;
1629 dev->net->stats.rx_dropped++;
1630
1631 if (rx_cmd_a & RX_CMD_A_FCS)
1632 dev->net->stats.rx_crc_errors++;
1633 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1634 dev->net->stats.rx_frame_errors++;
1635 } else {
1636 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1637 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1638 netif_dbg(dev, rx_err, dev->net,
1639 "size err rx_cmd_a=0x%08x\n",
1640 rx_cmd_a);
1641 return 0;
1642 }
1643
1644 /* last frame in this batch */
1645 if (skb->len == size) {
1646 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
1647 rx_cmd_b);
1648
1649 skb_trim(skb, skb->len - 4); /* remove fcs */
1650 skb->truesize = size + sizeof(struct sk_buff);
1651
1652 return 1;
1653 }
1654
1655 ax_skb = skb_clone(skb, GFP_ATOMIC);
1656 if (unlikely(!ax_skb)) {
1657 netdev_warn(dev->net, "Error allocating skb\n");
1658 return 0;
1659 }
1660
1661 ax_skb->len = size;
1662 ax_skb->data = packet;
1663 skb_set_tail_pointer(ax_skb, size);
1664
1665 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
1666 rx_cmd_b);
1667
1668 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1669 ax_skb->truesize = size + sizeof(struct sk_buff);
1670
1671 usbnet_skb_return(dev, ax_skb);
1672 }
1673
1674 skb_pull(skb, size);
1675
1676 /* padding bytes before the next frame starts */
1677 if (skb->len)
1678 skb_pull(skb, align_count);
1679 }
1680
1681 if (unlikely(skb->len < 0)) {
1682 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1683 return 0;
1684 }
1685
1686 return 1;
1687 }
1688
1689 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1690 struct sk_buff *skb, gfp_t flags)
1691 {
1692 u32 tx_cmd_a, tx_cmd_b;
1693
1694 skb_linearize(skb);
1695
1696 if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1697 struct sk_buff *skb2 =
1698 skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1699 dev_kfree_skb_any(skb);
1700 skb = skb2;
1701 if (!skb)
1702 return NULL;
1703 }
1704
1705 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1706
1707 if (skb->ip_summed == CHECKSUM_PARTIAL)
1708 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1709
1710 if (skb_is_gso(skb)) {
1711 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1712 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1713
1714 tx_cmd_a |= TX_CMD_A_LSO;
1715 } else {
1716 tx_cmd_b = 0;
1717 }
1718
1719 skb_push(skb, 4);
1720 cpu_to_le32s(&tx_cmd_b);
1721 memcpy(skb->data, &tx_cmd_b, 4);
1722
1723 skb_push(skb, 4);
1724 cpu_to_le32s(&tx_cmd_a);
1725 memcpy(skb->data, &tx_cmd_a, 4);
1726
1727 return skb;
1728 }
1729
1730 static const struct driver_info smsc75xx_info = {
1731 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
1732 .bind = smsc75xx_bind,
1733 .unbind = smsc75xx_unbind,
1734 .link_reset = smsc75xx_link_reset,
1735 .reset = smsc75xx_reset,
1736 .rx_fixup = smsc75xx_rx_fixup,
1737 .tx_fixup = smsc75xx_tx_fixup,
1738 .status = smsc75xx_status,
1739 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1740 };
1741
1742 static const struct usb_device_id products[] = {
1743 {
1744 /* SMSC7500 USB Gigabit Ethernet Device */
1745 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1746 .driver_info = (unsigned long) &smsc75xx_info,
1747 },
1748 {
1749 /* SMSC7500 USB Gigabit Ethernet Device */
1750 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1751 .driver_info = (unsigned long) &smsc75xx_info,
1752 },
1753 { }, /* END */
1754 };
1755 MODULE_DEVICE_TABLE(usb, products);
1756
1757 static struct usb_driver smsc75xx_driver = {
1758 .name = SMSC_CHIPNAME,
1759 .id_table = products,
1760 .probe = usbnet_probe,
1761 .suspend = smsc75xx_suspend,
1762 .resume = smsc75xx_resume,
1763 .reset_resume = smsc75xx_resume,
1764 .disconnect = usbnet_disconnect,
1765 .disable_hub_initiated_lpm = 1,
1766 };
1767
1768 module_usb_driver(smsc75xx_driver);
1769
1770 MODULE_AUTHOR("Nancy Lin");
1771 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
1772 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1773 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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