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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[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_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,
107 "Failed to read reg index 0x%08x: %d", 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,
137 "Failed to write reg index 0x%08x: %d", 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 int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
189 {
190 unsigned long start_time = jiffies;
191 u32 val;
192 int ret;
193
194 do {
195 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
196 check_warn_return(ret, "Error reading MII_ACCESS");
197
198 if (!(val & MII_ACCESS_BUSY))
199 return 0;
200 } while (!time_after(jiffies, start_time + HZ));
201
202 return -EIO;
203 }
204
205 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
206 {
207 struct usbnet *dev = netdev_priv(netdev);
208 u32 val, addr;
209 int ret;
210
211 mutex_lock(&dev->phy_mutex);
212
213 /* confirm MII not busy */
214 ret = smsc75xx_phy_wait_not_busy(dev);
215 check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read");
216
217 /* set the address, index & direction (read from PHY) */
218 phy_id &= dev->mii.phy_id_mask;
219 idx &= dev->mii.reg_num_mask;
220 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
221 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
222 | MII_ACCESS_READ | MII_ACCESS_BUSY;
223 ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
224 check_warn_goto_done(ret, "Error writing MII_ACCESS");
225
226 ret = smsc75xx_phy_wait_not_busy(dev);
227 check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
228
229 ret = smsc75xx_read_reg(dev, MII_DATA, &val);
230 check_warn_goto_done(ret, "Error reading MII_DATA");
231
232 ret = (u16)(val & 0xFFFF);
233
234 done:
235 mutex_unlock(&dev->phy_mutex);
236 return ret;
237 }
238
239 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
240 int regval)
241 {
242 struct usbnet *dev = netdev_priv(netdev);
243 u32 val, addr;
244 int ret;
245
246 mutex_lock(&dev->phy_mutex);
247
248 /* confirm MII not busy */
249 ret = smsc75xx_phy_wait_not_busy(dev);
250 check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write");
251
252 val = regval;
253 ret = smsc75xx_write_reg(dev, MII_DATA, val);
254 check_warn_goto_done(ret, "Error writing MII_DATA");
255
256 /* set the address, index & direction (write to PHY) */
257 phy_id &= dev->mii.phy_id_mask;
258 idx &= dev->mii.reg_num_mask;
259 addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
260 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
261 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
262 ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
263 check_warn_goto_done(ret, "Error writing MII_ACCESS");
264
265 ret = smsc75xx_phy_wait_not_busy(dev);
266 check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
267
268 done:
269 mutex_unlock(&dev->phy_mutex);
270 }
271
272 static int smsc75xx_wait_eeprom(struct usbnet *dev)
273 {
274 unsigned long start_time = jiffies;
275 u32 val;
276 int ret;
277
278 do {
279 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
280 check_warn_return(ret, "Error reading E2P_CMD");
281
282 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
283 break;
284 udelay(40);
285 } while (!time_after(jiffies, start_time + HZ));
286
287 if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
288 netdev_warn(dev->net, "EEPROM read operation timeout");
289 return -EIO;
290 }
291
292 return 0;
293 }
294
295 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
296 {
297 unsigned long start_time = jiffies;
298 u32 val;
299 int ret;
300
301 do {
302 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
303 check_warn_return(ret, "Error reading E2P_CMD");
304
305 if (!(val & E2P_CMD_BUSY))
306 return 0;
307
308 udelay(40);
309 } while (!time_after(jiffies, start_time + HZ));
310
311 netdev_warn(dev->net, "EEPROM is busy");
312 return -EIO;
313 }
314
315 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
316 u8 *data)
317 {
318 u32 val;
319 int i, ret;
320
321 BUG_ON(!dev);
322 BUG_ON(!data);
323
324 ret = smsc75xx_eeprom_confirm_not_busy(dev);
325 if (ret)
326 return ret;
327
328 for (i = 0; i < length; i++) {
329 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
330 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
331 check_warn_return(ret, "Error writing E2P_CMD");
332
333 ret = smsc75xx_wait_eeprom(dev);
334 if (ret < 0)
335 return ret;
336
337 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
338 check_warn_return(ret, "Error reading E2P_DATA");
339
340 data[i] = val & 0xFF;
341 offset++;
342 }
343
344 return 0;
345 }
346
347 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
348 u8 *data)
349 {
350 u32 val;
351 int i, ret;
352
353 BUG_ON(!dev);
354 BUG_ON(!data);
355
356 ret = smsc75xx_eeprom_confirm_not_busy(dev);
357 if (ret)
358 return ret;
359
360 /* Issue write/erase enable command */
361 val = E2P_CMD_BUSY | E2P_CMD_EWEN;
362 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
363 check_warn_return(ret, "Error writing E2P_CMD");
364
365 ret = smsc75xx_wait_eeprom(dev);
366 if (ret < 0)
367 return ret;
368
369 for (i = 0; i < length; i++) {
370
371 /* Fill data register */
372 val = data[i];
373 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
374 check_warn_return(ret, "Error writing E2P_DATA");
375
376 /* Send "write" command */
377 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
378 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
379 check_warn_return(ret, "Error writing E2P_CMD");
380
381 ret = smsc75xx_wait_eeprom(dev);
382 if (ret < 0)
383 return ret;
384
385 offset++;
386 }
387
388 return 0;
389 }
390
391 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
392 {
393 int i, ret;
394
395 for (i = 0; i < 100; i++) {
396 u32 dp_sel;
397 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
398 check_warn_return(ret, "Error reading DP_SEL");
399
400 if (dp_sel & DP_SEL_DPRDY)
401 return 0;
402
403 udelay(40);
404 }
405
406 netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
407
408 return -EIO;
409 }
410
411 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
412 u32 length, u32 *buf)
413 {
414 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
415 u32 dp_sel;
416 int i, ret;
417
418 mutex_lock(&pdata->dataport_mutex);
419
420 ret = smsc75xx_dataport_wait_not_busy(dev);
421 check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
422
423 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
424 check_warn_goto_done(ret, "Error reading DP_SEL");
425
426 dp_sel &= ~DP_SEL_RSEL;
427 dp_sel |= ram_select;
428 ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
429 check_warn_goto_done(ret, "Error writing DP_SEL");
430
431 for (i = 0; i < length; i++) {
432 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
433 check_warn_goto_done(ret, "Error writing DP_ADDR");
434
435 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
436 check_warn_goto_done(ret, "Error writing DP_DATA");
437
438 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
439 check_warn_goto_done(ret, "Error writing DP_CMD");
440
441 ret = smsc75xx_dataport_wait_not_busy(dev);
442 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
443 }
444
445 done:
446 mutex_unlock(&pdata->dataport_mutex);
447 return ret;
448 }
449
450 /* returns hash bit number for given MAC address */
451 static u32 smsc75xx_hash(char addr[ETH_ALEN])
452 {
453 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
454 }
455
456 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
457 {
458 struct smsc75xx_priv *pdata =
459 container_of(param, struct smsc75xx_priv, set_multicast);
460 struct usbnet *dev = pdata->dev;
461 int ret;
462
463 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
464 pdata->rfe_ctl);
465
466 smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
467 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
468
469 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
470 check_warn(ret, "Error writing RFE_CRL");
471 }
472
473 static void smsc75xx_set_multicast(struct net_device *netdev)
474 {
475 struct usbnet *dev = netdev_priv(netdev);
476 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
477 unsigned long flags;
478 int i;
479
480 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
481
482 pdata->rfe_ctl &=
483 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
484 pdata->rfe_ctl |= RFE_CTL_AB;
485
486 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
487 pdata->multicast_hash_table[i] = 0;
488
489 if (dev->net->flags & IFF_PROMISC) {
490 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
491 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
492 } else if (dev->net->flags & IFF_ALLMULTI) {
493 netif_dbg(dev, drv, dev->net, "receive all multicast enabled");
494 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
495 } else if (!netdev_mc_empty(dev->net)) {
496 struct netdev_hw_addr *ha;
497
498 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
499
500 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
501
502 netdev_for_each_mc_addr(ha, netdev) {
503 u32 bitnum = smsc75xx_hash(ha->addr);
504 pdata->multicast_hash_table[bitnum / 32] |=
505 (1 << (bitnum % 32));
506 }
507 } else {
508 netif_dbg(dev, drv, dev->net, "receive own packets only");
509 pdata->rfe_ctl |= RFE_CTL_DPF;
510 }
511
512 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
513
514 /* defer register writes to a sleepable context */
515 schedule_work(&pdata->set_multicast);
516 }
517
518 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
519 u16 lcladv, u16 rmtadv)
520 {
521 u32 flow = 0, fct_flow = 0;
522 int ret;
523
524 if (duplex == DUPLEX_FULL) {
525 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
526
527 if (cap & FLOW_CTRL_TX) {
528 flow = (FLOW_TX_FCEN | 0xFFFF);
529 /* set fct_flow thresholds to 20% and 80% */
530 fct_flow = (8 << 8) | 32;
531 }
532
533 if (cap & FLOW_CTRL_RX)
534 flow |= FLOW_RX_FCEN;
535
536 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
537 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
538 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
539 } else {
540 netif_dbg(dev, link, dev->net, "half duplex");
541 }
542
543 ret = smsc75xx_write_reg(dev, FLOW, flow);
544 check_warn_return(ret, "Error writing FLOW");
545
546 ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
547 check_warn_return(ret, "Error writing FCT_FLOW");
548
549 return 0;
550 }
551
552 static int smsc75xx_link_reset(struct usbnet *dev)
553 {
554 struct mii_if_info *mii = &dev->mii;
555 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
556 u16 lcladv, rmtadv;
557 int ret;
558
559 /* write to clear phy interrupt status */
560 smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
561 PHY_INT_SRC_CLEAR_ALL);
562
563 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
564 check_warn_return(ret, "Error writing INT_STS");
565
566 mii_check_media(mii, 1, 1);
567 mii_ethtool_gset(&dev->mii, &ecmd);
568 lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
569 rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
570
571 netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x"
572 " rmtadv: %04x", ethtool_cmd_speed(&ecmd),
573 ecmd.duplex, lcladv, rmtadv);
574
575 return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
576 }
577
578 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
579 {
580 u32 intdata;
581
582 if (urb->actual_length != 4) {
583 netdev_warn(dev->net,
584 "unexpected urb length %d", urb->actual_length);
585 return;
586 }
587
588 memcpy(&intdata, urb->transfer_buffer, 4);
589 le32_to_cpus(&intdata);
590
591 netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
592
593 if (intdata & INT_ENP_PHY_INT)
594 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
595 else
596 netdev_warn(dev->net,
597 "unexpected interrupt, intdata=0x%08X", intdata);
598 }
599
600 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
601 {
602 return MAX_EEPROM_SIZE;
603 }
604
605 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
606 struct ethtool_eeprom *ee, u8 *data)
607 {
608 struct usbnet *dev = netdev_priv(netdev);
609
610 ee->magic = LAN75XX_EEPROM_MAGIC;
611
612 return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
613 }
614
615 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
616 struct ethtool_eeprom *ee, u8 *data)
617 {
618 struct usbnet *dev = netdev_priv(netdev);
619
620 if (ee->magic != LAN75XX_EEPROM_MAGIC) {
621 netdev_warn(dev->net,
622 "EEPROM: magic value mismatch: 0x%x", ee->magic);
623 return -EINVAL;
624 }
625
626 return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
627 }
628
629 static void smsc75xx_ethtool_get_wol(struct net_device *net,
630 struct ethtool_wolinfo *wolinfo)
631 {
632 struct usbnet *dev = netdev_priv(net);
633 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
634
635 wolinfo->supported = SUPPORTED_WAKE;
636 wolinfo->wolopts = pdata->wolopts;
637 }
638
639 static int smsc75xx_ethtool_set_wol(struct net_device *net,
640 struct ethtool_wolinfo *wolinfo)
641 {
642 struct usbnet *dev = netdev_priv(net);
643 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
644
645 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
646 return 0;
647 }
648
649 static const struct ethtool_ops smsc75xx_ethtool_ops = {
650 .get_link = usbnet_get_link,
651 .nway_reset = usbnet_nway_reset,
652 .get_drvinfo = usbnet_get_drvinfo,
653 .get_msglevel = usbnet_get_msglevel,
654 .set_msglevel = usbnet_set_msglevel,
655 .get_settings = usbnet_get_settings,
656 .set_settings = usbnet_set_settings,
657 .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
658 .get_eeprom = smsc75xx_ethtool_get_eeprom,
659 .set_eeprom = smsc75xx_ethtool_set_eeprom,
660 .get_wol = smsc75xx_ethtool_get_wol,
661 .set_wol = smsc75xx_ethtool_set_wol,
662 };
663
664 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
665 {
666 struct usbnet *dev = netdev_priv(netdev);
667
668 if (!netif_running(netdev))
669 return -EINVAL;
670
671 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
672 }
673
674 static void smsc75xx_init_mac_address(struct usbnet *dev)
675 {
676 /* try reading mac address from EEPROM */
677 if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
678 dev->net->dev_addr) == 0) {
679 if (is_valid_ether_addr(dev->net->dev_addr)) {
680 /* eeprom values are valid so use them */
681 netif_dbg(dev, ifup, dev->net,
682 "MAC address read from EEPROM");
683 return;
684 }
685 }
686
687 /* no eeprom, or eeprom values are invalid. generate random MAC */
688 eth_hw_addr_random(dev->net);
689 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr");
690 }
691
692 static int smsc75xx_set_mac_address(struct usbnet *dev)
693 {
694 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
695 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
696 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
697
698 int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
699 check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
700
701 ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
702 check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
703
704 addr_hi |= ADDR_FILTX_FB_VALID;
705 ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
706 check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
707
708 ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
709 check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
710
711 return 0;
712 }
713
714 static int smsc75xx_phy_initialize(struct usbnet *dev)
715 {
716 int bmcr, ret, timeout = 0;
717
718 /* Initialize MII structure */
719 dev->mii.dev = dev->net;
720 dev->mii.mdio_read = smsc75xx_mdio_read;
721 dev->mii.mdio_write = smsc75xx_mdio_write;
722 dev->mii.phy_id_mask = 0x1f;
723 dev->mii.reg_num_mask = 0x1f;
724 dev->mii.supports_gmii = 1;
725 dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
726
727 /* reset phy and wait for reset to complete */
728 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
729
730 do {
731 msleep(10);
732 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
733 check_warn_return(bmcr, "Error reading MII_BMCR");
734 timeout++;
735 } while ((bmcr & BMCR_RESET) && (timeout < 100));
736
737 if (timeout >= 100) {
738 netdev_warn(dev->net, "timeout on PHY Reset");
739 return -EIO;
740 }
741
742 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
743 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
744 ADVERTISE_PAUSE_ASYM);
745 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
746 ADVERTISE_1000FULL);
747
748 /* read and write to clear phy interrupt status */
749 ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
750 check_warn_return(ret, "Error reading PHY_INT_SRC");
751 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
752
753 smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
754 PHY_INT_MASK_DEFAULT);
755 mii_nway_restart(&dev->mii);
756
757 netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
758 return 0;
759 }
760
761 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
762 {
763 int ret = 0;
764 u32 buf;
765 bool rxenabled;
766
767 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
768 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
769
770 rxenabled = ((buf & MAC_RX_RXEN) != 0);
771
772 if (rxenabled) {
773 buf &= ~MAC_RX_RXEN;
774 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
775 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
776 }
777
778 /* add 4 to size for FCS */
779 buf &= ~MAC_RX_MAX_SIZE;
780 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
781
782 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
783 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
784
785 if (rxenabled) {
786 buf |= MAC_RX_RXEN;
787 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
788 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
789 }
790
791 return 0;
792 }
793
794 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
795 {
796 struct usbnet *dev = netdev_priv(netdev);
797
798 int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
799 check_warn_return(ret, "Failed to set mac rx frame length");
800
801 return usbnet_change_mtu(netdev, new_mtu);
802 }
803
804 /* Enable or disable Rx checksum offload engine */
805 static int smsc75xx_set_features(struct net_device *netdev,
806 netdev_features_t features)
807 {
808 struct usbnet *dev = netdev_priv(netdev);
809 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
810 unsigned long flags;
811 int ret;
812
813 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
814
815 if (features & NETIF_F_RXCSUM)
816 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
817 else
818 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
819
820 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
821 /* it's racing here! */
822
823 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
824 check_warn_return(ret, "Error writing RFE_CTL");
825
826 return 0;
827 }
828
829 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
830 {
831 int timeout = 0;
832
833 do {
834 u32 buf;
835 int ret;
836
837 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
838
839 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
840
841 if (buf & PMT_CTL_DEV_RDY)
842 return 0;
843
844 msleep(10);
845 timeout++;
846 } while (timeout < 100);
847
848 netdev_warn(dev->net, "timeout waiting for device ready");
849 return -EIO;
850 }
851
852 static int smsc75xx_reset(struct usbnet *dev)
853 {
854 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
855 u32 buf;
856 int ret = 0, timeout;
857
858 netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
859
860 ret = smsc75xx_wait_ready(dev, 0);
861 check_warn_return(ret, "device not ready in smsc75xx_reset");
862
863 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
864 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
865
866 buf |= HW_CFG_LRST;
867
868 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
869 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
870
871 timeout = 0;
872 do {
873 msleep(10);
874 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
875 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
876 timeout++;
877 } while ((buf & HW_CFG_LRST) && (timeout < 100));
878
879 if (timeout >= 100) {
880 netdev_warn(dev->net, "timeout on completion of Lite Reset");
881 return -EIO;
882 }
883
884 netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
885
886 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
887 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
888
889 buf |= PMT_CTL_PHY_RST;
890
891 ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
892 check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
893
894 timeout = 0;
895 do {
896 msleep(10);
897 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
898 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
899 timeout++;
900 } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
901
902 if (timeout >= 100) {
903 netdev_warn(dev->net, "timeout waiting for PHY Reset");
904 return -EIO;
905 }
906
907 netif_dbg(dev, ifup, dev->net, "PHY reset complete");
908
909 smsc75xx_init_mac_address(dev);
910
911 ret = smsc75xx_set_mac_address(dev);
912 check_warn_return(ret, "Failed to set mac address");
913
914 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
915
916 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
917 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
918
919 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
920
921 buf |= HW_CFG_BIR;
922
923 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
924 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
925
926 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
927 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
928
929 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
930 "writing HW_CFG_BIR: 0x%08x", buf);
931
932 if (!turbo_mode) {
933 buf = 0;
934 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
935 } else if (dev->udev->speed == USB_SPEED_HIGH) {
936 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
937 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
938 } else {
939 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
940 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
941 }
942
943 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
944 (ulong)dev->rx_urb_size);
945
946 ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
947 check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
948
949 ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
950 check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
951
952 netif_dbg(dev, ifup, dev->net,
953 "Read Value from BURST_CAP after writing: 0x%08x", buf);
954
955 ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
956 check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
957
958 ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
959 check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
960
961 netif_dbg(dev, ifup, dev->net,
962 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
963
964 if (turbo_mode) {
965 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
966 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
967
968 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
969
970 buf |= (HW_CFG_MEF | HW_CFG_BCE);
971
972 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
973 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
974
975 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
976 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
977
978 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
979 }
980
981 /* set FIFO sizes */
982 buf = (MAX_RX_FIFO_SIZE - 512) / 512;
983 ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
984 check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
985
986 netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
987
988 buf = (MAX_TX_FIFO_SIZE - 512) / 512;
989 ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
990 check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
991
992 netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
993
994 ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
995 check_warn_return(ret, "Failed to write INT_STS: %d", ret);
996
997 ret = smsc75xx_read_reg(dev, ID_REV, &buf);
998 check_warn_return(ret, "Failed to read ID_REV: %d", ret);
999
1000 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
1001
1002 ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1003 check_warn_return(ret, "Failed to read E2P_CMD: %d", ret);
1004
1005 /* only set default GPIO/LED settings if no EEPROM is detected */
1006 if (!(buf & E2P_CMD_LOADED)) {
1007 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1008 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
1009
1010 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1011 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1012
1013 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1014 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
1015 }
1016
1017 ret = smsc75xx_write_reg(dev, FLOW, 0);
1018 check_warn_return(ret, "Failed to write FLOW: %d", ret);
1019
1020 ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1021 check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
1022
1023 /* Don't need rfe_ctl_lock during initialisation */
1024 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1025 check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
1026
1027 pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1028
1029 ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1030 check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
1031
1032 ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1033 check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
1034
1035 netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
1036
1037 /* Enable or disable checksum offload engines */
1038 smsc75xx_set_features(dev->net, dev->net->features);
1039
1040 smsc75xx_set_multicast(dev->net);
1041
1042 ret = smsc75xx_phy_initialize(dev);
1043 check_warn_return(ret, "Failed to initialize PHY: %d", ret);
1044
1045 ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1046 check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
1047
1048 /* enable PHY interrupts */
1049 buf |= INT_ENP_PHY_INT;
1050
1051 ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1052 check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
1053
1054 /* allow mac to detect speed and duplex from phy */
1055 ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1056 check_warn_return(ret, "Failed to read MAC_CR: %d", ret);
1057
1058 buf |= (MAC_CR_ADD | MAC_CR_ASD);
1059 ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1060 check_warn_return(ret, "Failed to write MAC_CR: %d", ret);
1061
1062 ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1063 check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
1064
1065 buf |= MAC_TX_TXEN;
1066
1067 ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1068 check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
1069
1070 netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
1071
1072 ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1073 check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
1074
1075 buf |= FCT_TX_CTL_EN;
1076
1077 ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1078 check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
1079
1080 netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
1081
1082 ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1083 check_warn_return(ret, "Failed to set max rx frame length");
1084
1085 ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1086 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1087
1088 buf |= MAC_RX_RXEN;
1089
1090 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1091 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1092
1093 netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
1094
1095 ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1096 check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
1097
1098 buf |= FCT_RX_CTL_EN;
1099
1100 ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1101 check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
1102
1103 netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
1104
1105 netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
1106 return 0;
1107 }
1108
1109 static const struct net_device_ops smsc75xx_netdev_ops = {
1110 .ndo_open = usbnet_open,
1111 .ndo_stop = usbnet_stop,
1112 .ndo_start_xmit = usbnet_start_xmit,
1113 .ndo_tx_timeout = usbnet_tx_timeout,
1114 .ndo_change_mtu = smsc75xx_change_mtu,
1115 .ndo_set_mac_address = eth_mac_addr,
1116 .ndo_validate_addr = eth_validate_addr,
1117 .ndo_do_ioctl = smsc75xx_ioctl,
1118 .ndo_set_rx_mode = smsc75xx_set_multicast,
1119 .ndo_set_features = smsc75xx_set_features,
1120 };
1121
1122 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1123 {
1124 struct smsc75xx_priv *pdata = NULL;
1125 int ret;
1126
1127 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1128
1129 ret = usbnet_get_endpoints(dev, intf);
1130 check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1131
1132 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1133 GFP_KERNEL);
1134
1135 pdata = (struct smsc75xx_priv *)(dev->data[0]);
1136 if (!pdata) {
1137 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1138 return -ENOMEM;
1139 }
1140
1141 pdata->dev = dev;
1142
1143 spin_lock_init(&pdata->rfe_ctl_lock);
1144 mutex_init(&pdata->dataport_mutex);
1145
1146 INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1147
1148 if (DEFAULT_TX_CSUM_ENABLE) {
1149 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1150 if (DEFAULT_TSO_ENABLE)
1151 dev->net->features |= NETIF_F_SG |
1152 NETIF_F_TSO | NETIF_F_TSO6;
1153 }
1154 if (DEFAULT_RX_CSUM_ENABLE)
1155 dev->net->features |= NETIF_F_RXCSUM;
1156
1157 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1158 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1159
1160 /* Init all registers */
1161 ret = smsc75xx_reset(dev);
1162
1163 dev->net->netdev_ops = &smsc75xx_netdev_ops;
1164 dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1165 dev->net->flags |= IFF_MULTICAST;
1166 dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1167 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1168 return 0;
1169 }
1170
1171 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1172 {
1173 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1174 if (pdata) {
1175 netif_dbg(dev, ifdown, dev->net, "free pdata");
1176 kfree(pdata);
1177 pdata = NULL;
1178 dev->data[0] = 0;
1179 }
1180 }
1181
1182 static u16 smsc_crc(const u8 *buffer, size_t len)
1183 {
1184 return bitrev16(crc16(0xFFFF, buffer, len));
1185 }
1186
1187 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1188 u32 wuf_mask1)
1189 {
1190 int cfg_base = WUF_CFGX + filter * 4;
1191 int mask_base = WUF_MASKX + filter * 16;
1192 int ret;
1193
1194 ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1195 check_warn_return(ret, "Error writing WUF_CFGX");
1196
1197 ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1198 check_warn_return(ret, "Error writing WUF_MASKX");
1199
1200 ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1201 check_warn_return(ret, "Error writing WUF_MASKX");
1202
1203 ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1204 check_warn_return(ret, "Error writing WUF_MASKX");
1205
1206 ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1207 check_warn_return(ret, "Error writing WUF_MASKX");
1208
1209 return 0;
1210 }
1211
1212 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1213 {
1214 struct usbnet *dev = usb_get_intfdata(intf);
1215 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1216 int ret;
1217 u32 val;
1218
1219 ret = usbnet_suspend(intf, message);
1220 check_warn_return(ret, "usbnet_suspend error");
1221
1222 /* if no wol options set, enter lowest power SUSPEND2 mode */
1223 if (!(pdata->wolopts & SUPPORTED_WAKE)) {
1224 netdev_info(dev->net, "entering SUSPEND2 mode");
1225
1226 /* disable energy detect (link up) & wake up events */
1227 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1228 check_warn_return(ret, "Error reading WUCSR");
1229
1230 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1231
1232 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1233 check_warn_return(ret, "Error writing WUCSR");
1234
1235 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1236 check_warn_return(ret, "Error reading PMT_CTL");
1237
1238 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1239
1240 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1241 check_warn_return(ret, "Error writing PMT_CTL");
1242
1243 /* enter suspend2 mode */
1244 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1245 check_warn_return(ret, "Error reading PMT_CTL");
1246
1247 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1248 val |= PMT_CTL_SUS_MODE_2;
1249
1250 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1251 check_warn_return(ret, "Error writing PMT_CTL");
1252
1253 return 0;
1254 }
1255
1256 if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1257 int i, filter = 0;
1258
1259 /* disable all filters */
1260 for (i = 0; i < WUF_NUM; i++) {
1261 ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1262 check_warn_return(ret, "Error writing WUF_CFGX");
1263 }
1264
1265 if (pdata->wolopts & WAKE_MCAST) {
1266 const u8 mcast[] = {0x01, 0x00, 0x5E};
1267 netdev_info(dev->net, "enabling multicast detection");
1268
1269 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1270 | smsc_crc(mcast, 3);
1271 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1272 check_warn_return(ret, "Error writing wakeup filter");
1273 }
1274
1275 if (pdata->wolopts & WAKE_ARP) {
1276 const u8 arp[] = {0x08, 0x06};
1277 netdev_info(dev->net, "enabling ARP detection");
1278
1279 val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1280 | smsc_crc(arp, 2);
1281 ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1282 check_warn_return(ret, "Error writing wakeup filter");
1283 }
1284
1285 /* clear any pending pattern match packet status */
1286 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1287 check_warn_return(ret, "Error reading WUCSR");
1288
1289 val |= WUCSR_WUFR;
1290
1291 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1292 check_warn_return(ret, "Error writing WUCSR");
1293
1294 netdev_info(dev->net, "enabling packet match detection");
1295 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1296 check_warn_return(ret, "Error reading WUCSR");
1297
1298 val |= WUCSR_WUEN;
1299
1300 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1301 check_warn_return(ret, "Error writing WUCSR");
1302 } else {
1303 netdev_info(dev->net, "disabling packet match detection");
1304 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1305 check_warn_return(ret, "Error reading WUCSR");
1306
1307 val &= ~WUCSR_WUEN;
1308
1309 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1310 check_warn_return(ret, "Error writing WUCSR");
1311 }
1312
1313 /* disable magic, bcast & unicast wakeup sources */
1314 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1315 check_warn_return(ret, "Error reading WUCSR");
1316
1317 val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1318
1319 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1320 check_warn_return(ret, "Error writing WUCSR");
1321
1322 if (pdata->wolopts & WAKE_MAGIC) {
1323 netdev_info(dev->net, "enabling magic packet wakeup");
1324 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1325 check_warn_return(ret, "Error reading WUCSR");
1326
1327 /* clear any pending magic packet status */
1328 val |= WUCSR_MPR | WUCSR_MPEN;
1329
1330 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1331 check_warn_return(ret, "Error writing WUCSR");
1332 }
1333
1334 if (pdata->wolopts & WAKE_BCAST) {
1335 netdev_info(dev->net, "enabling broadcast detection");
1336 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1337 check_warn_return(ret, "Error reading WUCSR");
1338
1339 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1340
1341 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1342 check_warn_return(ret, "Error writing WUCSR");
1343 }
1344
1345 if (pdata->wolopts & WAKE_UCAST) {
1346 netdev_info(dev->net, "enabling unicast detection");
1347 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1348 check_warn_return(ret, "Error reading WUCSR");
1349
1350 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1351
1352 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1353 check_warn_return(ret, "Error writing WUCSR");
1354 }
1355
1356 /* enable receiver to enable frame reception */
1357 ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1358 check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1359
1360 val |= MAC_RX_RXEN;
1361
1362 ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
1363 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1364
1365 /* some wol options are enabled, so enter SUSPEND0 */
1366 netdev_info(dev->net, "entering SUSPEND0 mode");
1367
1368 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1369 check_warn_return(ret, "Error reading PMT_CTL");
1370
1371 val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1372 val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1373
1374 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1375 check_warn_return(ret, "Error writing PMT_CTL");
1376
1377 smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1378
1379 return 0;
1380 }
1381
1382 static int smsc75xx_resume(struct usb_interface *intf)
1383 {
1384 struct usbnet *dev = usb_get_intfdata(intf);
1385 struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1386 int ret;
1387 u32 val;
1388
1389 if (pdata->wolopts) {
1390 netdev_info(dev->net, "resuming from SUSPEND0");
1391
1392 smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1393
1394 /* Disable wakeup sources */
1395 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1396 check_warn_return(ret, "Error reading WUCSR");
1397
1398 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
1399 | WUCSR_BCST_EN);
1400
1401 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1402 check_warn_return(ret, "Error writing WUCSR");
1403
1404 /* clear wake-up status */
1405 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1406 check_warn_return(ret, "Error reading PMT_CTL");
1407
1408 val &= ~PMT_CTL_WOL_EN;
1409 val |= PMT_CTL_WUPS;
1410
1411 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1412 check_warn_return(ret, "Error writing PMT_CTL");
1413 } else {
1414 netdev_info(dev->net, "resuming from SUSPEND2");
1415
1416 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1417 check_warn_return(ret, "Error reading PMT_CTL");
1418
1419 val |= PMT_CTL_PHY_PWRUP;
1420
1421 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1422 check_warn_return(ret, "Error writing PMT_CTL");
1423 }
1424
1425 ret = smsc75xx_wait_ready(dev, 1);
1426 check_warn_return(ret, "device not ready in smsc75xx_resume");
1427
1428 return usbnet_resume(intf);
1429 }
1430
1431 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
1432 u32 rx_cmd_a, u32 rx_cmd_b)
1433 {
1434 if (!(dev->net->features & NETIF_F_RXCSUM) ||
1435 unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1436 skb->ip_summed = CHECKSUM_NONE;
1437 } else {
1438 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1439 skb->ip_summed = CHECKSUM_COMPLETE;
1440 }
1441 }
1442
1443 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1444 {
1445 while (skb->len > 0) {
1446 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1447 struct sk_buff *ax_skb;
1448 unsigned char *packet;
1449
1450 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1451 le32_to_cpus(&rx_cmd_a);
1452 skb_pull(skb, 4);
1453
1454 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1455 le32_to_cpus(&rx_cmd_b);
1456 skb_pull(skb, 4 + RXW_PADDING);
1457
1458 packet = skb->data;
1459
1460 /* get the packet length */
1461 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
1462 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
1463
1464 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1465 netif_dbg(dev, rx_err, dev->net,
1466 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1467 dev->net->stats.rx_errors++;
1468 dev->net->stats.rx_dropped++;
1469
1470 if (rx_cmd_a & RX_CMD_A_FCS)
1471 dev->net->stats.rx_crc_errors++;
1472 else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1473 dev->net->stats.rx_frame_errors++;
1474 } else {
1475 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1476 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1477 netif_dbg(dev, rx_err, dev->net,
1478 "size err rx_cmd_a=0x%08x", rx_cmd_a);
1479 return 0;
1480 }
1481
1482 /* last frame in this batch */
1483 if (skb->len == size) {
1484 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
1485 rx_cmd_b);
1486
1487 skb_trim(skb, skb->len - 4); /* remove fcs */
1488 skb->truesize = size + sizeof(struct sk_buff);
1489
1490 return 1;
1491 }
1492
1493 ax_skb = skb_clone(skb, GFP_ATOMIC);
1494 if (unlikely(!ax_skb)) {
1495 netdev_warn(dev->net, "Error allocating skb");
1496 return 0;
1497 }
1498
1499 ax_skb->len = size;
1500 ax_skb->data = packet;
1501 skb_set_tail_pointer(ax_skb, size);
1502
1503 smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
1504 rx_cmd_b);
1505
1506 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1507 ax_skb->truesize = size + sizeof(struct sk_buff);
1508
1509 usbnet_skb_return(dev, ax_skb);
1510 }
1511
1512 skb_pull(skb, size);
1513
1514 /* padding bytes before the next frame starts */
1515 if (skb->len)
1516 skb_pull(skb, align_count);
1517 }
1518
1519 if (unlikely(skb->len < 0)) {
1520 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1521 return 0;
1522 }
1523
1524 return 1;
1525 }
1526
1527 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1528 struct sk_buff *skb, gfp_t flags)
1529 {
1530 u32 tx_cmd_a, tx_cmd_b;
1531
1532 skb_linearize(skb);
1533
1534 if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1535 struct sk_buff *skb2 =
1536 skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1537 dev_kfree_skb_any(skb);
1538 skb = skb2;
1539 if (!skb)
1540 return NULL;
1541 }
1542
1543 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1544
1545 if (skb->ip_summed == CHECKSUM_PARTIAL)
1546 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1547
1548 if (skb_is_gso(skb)) {
1549 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1550 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1551
1552 tx_cmd_a |= TX_CMD_A_LSO;
1553 } else {
1554 tx_cmd_b = 0;
1555 }
1556
1557 skb_push(skb, 4);
1558 cpu_to_le32s(&tx_cmd_b);
1559 memcpy(skb->data, &tx_cmd_b, 4);
1560
1561 skb_push(skb, 4);
1562 cpu_to_le32s(&tx_cmd_a);
1563 memcpy(skb->data, &tx_cmd_a, 4);
1564
1565 return skb;
1566 }
1567
1568 static const struct driver_info smsc75xx_info = {
1569 .description = "smsc75xx USB 2.0 Gigabit Ethernet",
1570 .bind = smsc75xx_bind,
1571 .unbind = smsc75xx_unbind,
1572 .link_reset = smsc75xx_link_reset,
1573 .reset = smsc75xx_reset,
1574 .rx_fixup = smsc75xx_rx_fixup,
1575 .tx_fixup = smsc75xx_tx_fixup,
1576 .status = smsc75xx_status,
1577 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1578 };
1579
1580 static const struct usb_device_id products[] = {
1581 {
1582 /* SMSC7500 USB Gigabit Ethernet Device */
1583 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1584 .driver_info = (unsigned long) &smsc75xx_info,
1585 },
1586 {
1587 /* SMSC7500 USB Gigabit Ethernet Device */
1588 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1589 .driver_info = (unsigned long) &smsc75xx_info,
1590 },
1591 { }, /* END */
1592 };
1593 MODULE_DEVICE_TABLE(usb, products);
1594
1595 static struct usb_driver smsc75xx_driver = {
1596 .name = SMSC_CHIPNAME,
1597 .id_table = products,
1598 .probe = usbnet_probe,
1599 .suspend = smsc75xx_suspend,
1600 .resume = smsc75xx_resume,
1601 .reset_resume = smsc75xx_resume,
1602 .disconnect = usbnet_disconnect,
1603 .disable_hub_initiated_lpm = 1,
1604 };
1605
1606 module_usb_driver(smsc75xx_driver);
1607
1608 MODULE_AUTHOR("Nancy Lin");
1609 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
1610 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1611 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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