]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/net/usb/smsc95xx.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'omap-for-v3.8/cleanup-headers-asoc' into omap-for-v3.8/cleanup-headers
[mirror_ubuntu-artful-kernel.git] / drivers / net / usb / smsc95xx.c
1 /***************************************************************************
2 *
3 * Copyright (C) 2007-2008 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/crc32.h>
30 #include <linux/usb/usbnet.h>
31 #include <linux/slab.h>
32 #include "smsc95xx.h"
33
34 #define SMSC_CHIPNAME "smsc95xx"
35 #define SMSC_DRIVER_VERSION "1.0.4"
36 #define HS_USB_PKT_SIZE (512)
37 #define FS_USB_PKT_SIZE (64)
38 #define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
39 #define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
40 #define DEFAULT_BULK_IN_DELAY (0x00002000)
41 #define MAX_SINGLE_PACKET_SIZE (2048)
42 #define LAN95XX_EEPROM_MAGIC (0x9500)
43 #define EEPROM_MAC_OFFSET (0x01)
44 #define DEFAULT_TX_CSUM_ENABLE (true)
45 #define DEFAULT_RX_CSUM_ENABLE (true)
46 #define SMSC95XX_INTERNAL_PHY_ID (1)
47 #define SMSC95XX_TX_OVERHEAD (8)
48 #define SMSC95XX_TX_OVERHEAD_CSUM (12)
49 #define SUPPORTED_WAKE (WAKE_MAGIC)
50
51 #define check_warn(ret, fmt, args...) \
52 ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
53
54 #define check_warn_return(ret, fmt, args...) \
55 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
56
57 #define check_warn_goto_done(ret, fmt, args...) \
58 ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
59
60 struct smsc95xx_priv {
61 u32 mac_cr;
62 u32 hash_hi;
63 u32 hash_lo;
64 u32 wolopts;
65 spinlock_t mac_cr_lock;
66 };
67
68 struct usb_context {
69 struct usb_ctrlrequest req;
70 struct usbnet *dev;
71 };
72
73 static bool turbo_mode = true;
74 module_param(turbo_mode, bool, 0644);
75 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
76
77 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
78 u32 *data)
79 {
80 u32 *buf = kmalloc(4, GFP_KERNEL);
81 int ret;
82
83 BUG_ON(!dev);
84
85 if (!buf)
86 return -ENOMEM;
87
88 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
89 USB_VENDOR_REQUEST_READ_REGISTER,
90 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
91 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
92
93 if (unlikely(ret < 0))
94 netdev_warn(dev->net, "Failed to read register index 0x%08x\n", index);
95
96 le32_to_cpus(buf);
97 *data = *buf;
98 kfree(buf);
99
100 return ret;
101 }
102
103 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
104 u32 data)
105 {
106 u32 *buf = kmalloc(4, GFP_KERNEL);
107 int ret;
108
109 BUG_ON(!dev);
110
111 if (!buf)
112 return -ENOMEM;
113
114 *buf = data;
115 cpu_to_le32s(buf);
116
117 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
118 USB_VENDOR_REQUEST_WRITE_REGISTER,
119 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
120 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
121
122 if (unlikely(ret < 0))
123 netdev_warn(dev->net, "Failed to write register index 0x%08x\n", index);
124
125 kfree(buf);
126
127 return ret;
128 }
129
130 static int smsc95xx_set_feature(struct usbnet *dev, u32 feature)
131 {
132 if (WARN_ON_ONCE(!dev))
133 return -EINVAL;
134
135 cpu_to_le32s(&feature);
136
137 return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
138 USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
139 USB_CTRL_SET_TIMEOUT);
140 }
141
142 static int smsc95xx_clear_feature(struct usbnet *dev, u32 feature)
143 {
144 if (WARN_ON_ONCE(!dev))
145 return -EINVAL;
146
147 cpu_to_le32s(&feature);
148
149 return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
150 USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
151 USB_CTRL_SET_TIMEOUT);
152 }
153
154 /* Loop until the read is completed with timeout
155 * called with phy_mutex held */
156 static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev)
157 {
158 unsigned long start_time = jiffies;
159 u32 val;
160 int ret;
161
162 do {
163 ret = smsc95xx_read_reg(dev, MII_ADDR, &val);
164 check_warn_return(ret, "Error reading MII_ACCESS");
165 if (!(val & MII_BUSY_))
166 return 0;
167 } while (!time_after(jiffies, start_time + HZ));
168
169 return -EIO;
170 }
171
172 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
173 {
174 struct usbnet *dev = netdev_priv(netdev);
175 u32 val, addr;
176 int ret;
177
178 mutex_lock(&dev->phy_mutex);
179
180 /* confirm MII not busy */
181 ret = smsc95xx_phy_wait_not_busy(dev);
182 check_warn_goto_done(ret, "MII is busy in smsc95xx_mdio_read");
183
184 /* set the address, index & direction (read from PHY) */
185 phy_id &= dev->mii.phy_id_mask;
186 idx &= dev->mii.reg_num_mask;
187 addr = (phy_id << 11) | (idx << 6) | MII_READ_;
188 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
189 check_warn_goto_done(ret, "Error writing MII_ADDR");
190
191 ret = smsc95xx_phy_wait_not_busy(dev);
192 check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
193
194 ret = smsc95xx_read_reg(dev, MII_DATA, &val);
195 check_warn_goto_done(ret, "Error reading MII_DATA");
196
197 ret = (u16)(val & 0xFFFF);
198
199 done:
200 mutex_unlock(&dev->phy_mutex);
201 return ret;
202 }
203
204 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
205 int regval)
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 = smsc95xx_phy_wait_not_busy(dev);
215 check_warn_goto_done(ret, "MII is busy in smsc95xx_mdio_write");
216
217 val = regval;
218 ret = smsc95xx_write_reg(dev, MII_DATA, val);
219 check_warn_goto_done(ret, "Error writing MII_DATA");
220
221 /* set the address, index & direction (write to PHY) */
222 phy_id &= dev->mii.phy_id_mask;
223 idx &= dev->mii.reg_num_mask;
224 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
225 ret = smsc95xx_write_reg(dev, MII_ADDR, addr);
226 check_warn_goto_done(ret, "Error writing MII_ADDR");
227
228 ret = smsc95xx_phy_wait_not_busy(dev);
229 check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
230
231 done:
232 mutex_unlock(&dev->phy_mutex);
233 }
234
235 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
236 {
237 unsigned long start_time = jiffies;
238 u32 val;
239 int ret;
240
241 do {
242 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
243 check_warn_return(ret, "Error reading E2P_CMD");
244 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
245 break;
246 udelay(40);
247 } while (!time_after(jiffies, start_time + HZ));
248
249 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
250 netdev_warn(dev->net, "EEPROM read operation timeout\n");
251 return -EIO;
252 }
253
254 return 0;
255 }
256
257 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
258 {
259 unsigned long start_time = jiffies;
260 u32 val;
261 int ret;
262
263 do {
264 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
265 check_warn_return(ret, "Error reading E2P_CMD");
266
267 if (!(val & E2P_CMD_BUSY_))
268 return 0;
269
270 udelay(40);
271 } while (!time_after(jiffies, start_time + HZ));
272
273 netdev_warn(dev->net, "EEPROM is busy\n");
274 return -EIO;
275 }
276
277 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
278 u8 *data)
279 {
280 u32 val;
281 int i, ret;
282
283 BUG_ON(!dev);
284 BUG_ON(!data);
285
286 ret = smsc95xx_eeprom_confirm_not_busy(dev);
287 if (ret)
288 return ret;
289
290 for (i = 0; i < length; i++) {
291 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
292 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
293 check_warn_return(ret, "Error writing E2P_CMD");
294
295 ret = smsc95xx_wait_eeprom(dev);
296 if (ret < 0)
297 return ret;
298
299 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
300 check_warn_return(ret, "Error reading E2P_DATA");
301
302 data[i] = val & 0xFF;
303 offset++;
304 }
305
306 return 0;
307 }
308
309 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
310 u8 *data)
311 {
312 u32 val;
313 int i, ret;
314
315 BUG_ON(!dev);
316 BUG_ON(!data);
317
318 ret = smsc95xx_eeprom_confirm_not_busy(dev);
319 if (ret)
320 return ret;
321
322 /* Issue write/erase enable command */
323 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
324 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
325 check_warn_return(ret, "Error writing E2P_DATA");
326
327 ret = smsc95xx_wait_eeprom(dev);
328 if (ret < 0)
329 return ret;
330
331 for (i = 0; i < length; i++) {
332
333 /* Fill data register */
334 val = data[i];
335 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
336 check_warn_return(ret, "Error writing E2P_DATA");
337
338 /* Send "write" command */
339 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
340 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
341 check_warn_return(ret, "Error writing E2P_CMD");
342
343 ret = smsc95xx_wait_eeprom(dev);
344 if (ret < 0)
345 return ret;
346
347 offset++;
348 }
349
350 return 0;
351 }
352
353 static void smsc95xx_async_cmd_callback(struct urb *urb)
354 {
355 struct usb_context *usb_context = urb->context;
356 struct usbnet *dev = usb_context->dev;
357 int status = urb->status;
358
359 check_warn(status, "async callback failed with %d\n", status);
360
361 kfree(usb_context);
362 usb_free_urb(urb);
363 }
364
365 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
366 u32 *data)
367 {
368 struct usb_context *usb_context;
369 int status;
370 struct urb *urb;
371 const u16 size = 4;
372
373 urb = usb_alloc_urb(0, GFP_ATOMIC);
374 if (!urb) {
375 netdev_warn(dev->net, "Error allocating URB\n");
376 return -ENOMEM;
377 }
378
379 usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC);
380 if (usb_context == NULL) {
381 netdev_warn(dev->net, "Error allocating control msg\n");
382 usb_free_urb(urb);
383 return -ENOMEM;
384 }
385
386 usb_context->req.bRequestType =
387 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
388 usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER;
389 usb_context->req.wValue = 00;
390 usb_context->req.wIndex = cpu_to_le16(index);
391 usb_context->req.wLength = cpu_to_le16(size);
392
393 usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
394 (void *)&usb_context->req, data, size,
395 smsc95xx_async_cmd_callback,
396 (void *)usb_context);
397
398 status = usb_submit_urb(urb, GFP_ATOMIC);
399 if (status < 0) {
400 netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
401 status);
402 kfree(usb_context);
403 usb_free_urb(urb);
404 }
405
406 return status;
407 }
408
409 /* returns hash bit number for given MAC address
410 * example:
411 * 01 00 5E 00 00 01 -> returns bit number 31 */
412 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
413 {
414 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
415 }
416
417 static void smsc95xx_set_multicast(struct net_device *netdev)
418 {
419 struct usbnet *dev = netdev_priv(netdev);
420 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
421 unsigned long flags;
422 int ret;
423
424 pdata->hash_hi = 0;
425 pdata->hash_lo = 0;
426
427 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
428
429 if (dev->net->flags & IFF_PROMISC) {
430 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
431 pdata->mac_cr |= MAC_CR_PRMS_;
432 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
433 } else if (dev->net->flags & IFF_ALLMULTI) {
434 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
435 pdata->mac_cr |= MAC_CR_MCPAS_;
436 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
437 } else if (!netdev_mc_empty(dev->net)) {
438 struct netdev_hw_addr *ha;
439
440 pdata->mac_cr |= MAC_CR_HPFILT_;
441 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
442
443 netdev_for_each_mc_addr(ha, netdev) {
444 u32 bitnum = smsc95xx_hash(ha->addr);
445 u32 mask = 0x01 << (bitnum & 0x1F);
446 if (bitnum & 0x20)
447 pdata->hash_hi |= mask;
448 else
449 pdata->hash_lo |= mask;
450 }
451
452 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
453 pdata->hash_hi, pdata->hash_lo);
454 } else {
455 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
456 pdata->mac_cr &=
457 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
458 }
459
460 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
461
462 /* Initiate async writes, as we can't wait for completion here */
463 ret = smsc95xx_write_reg_async(dev, HASHH, &pdata->hash_hi);
464 check_warn(ret, "failed to initiate async write to HASHH");
465
466 ret = smsc95xx_write_reg_async(dev, HASHL, &pdata->hash_lo);
467 check_warn(ret, "failed to initiate async write to HASHL");
468
469 ret = smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
470 check_warn(ret, "failed to initiate async write to MAC_CR");
471 }
472
473 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
474 u16 lcladv, u16 rmtadv)
475 {
476 u32 flow, afc_cfg = 0;
477
478 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
479 check_warn_return(ret, "Error reading AFC_CFG");
480
481 if (duplex == DUPLEX_FULL) {
482 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
483
484 if (cap & FLOW_CTRL_RX)
485 flow = 0xFFFF0002;
486 else
487 flow = 0;
488
489 if (cap & FLOW_CTRL_TX)
490 afc_cfg |= 0xF;
491 else
492 afc_cfg &= ~0xF;
493
494 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
495 cap & FLOW_CTRL_RX ? "enabled" : "disabled",
496 cap & FLOW_CTRL_TX ? "enabled" : "disabled");
497 } else {
498 netif_dbg(dev, link, dev->net, "half duplex\n");
499 flow = 0;
500 afc_cfg |= 0xF;
501 }
502
503 ret = smsc95xx_write_reg(dev, FLOW, flow);
504 check_warn_return(ret, "Error writing FLOW");
505
506 ret = smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
507 check_warn_return(ret, "Error writing AFC_CFG");
508
509 return 0;
510 }
511
512 static int smsc95xx_link_reset(struct usbnet *dev)
513 {
514 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
515 struct mii_if_info *mii = &dev->mii;
516 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
517 unsigned long flags;
518 u16 lcladv, rmtadv;
519 int ret;
520
521 /* clear interrupt status */
522 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
523 check_warn_return(ret, "Error reading PHY_INT_SRC");
524
525 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
526 check_warn_return(ret, "Error writing INT_STS");
527
528 mii_check_media(mii, 1, 1);
529 mii_ethtool_gset(&dev->mii, &ecmd);
530 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
531 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
532
533 netif_dbg(dev, link, dev->net,
534 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
535 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
536
537 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
538 if (ecmd.duplex != DUPLEX_FULL) {
539 pdata->mac_cr &= ~MAC_CR_FDPX_;
540 pdata->mac_cr |= MAC_CR_RCVOWN_;
541 } else {
542 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
543 pdata->mac_cr |= MAC_CR_FDPX_;
544 }
545 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
546
547 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
548 check_warn_return(ret, "Error writing MAC_CR");
549
550 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
551 check_warn_return(ret, "Error updating PHY flow control");
552
553 return 0;
554 }
555
556 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
557 {
558 u32 intdata;
559
560 if (urb->actual_length != 4) {
561 netdev_warn(dev->net, "unexpected urb length %d\n",
562 urb->actual_length);
563 return;
564 }
565
566 memcpy(&intdata, urb->transfer_buffer, 4);
567 le32_to_cpus(&intdata);
568
569 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
570
571 if (intdata & INT_ENP_PHY_INT_)
572 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
573 else
574 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
575 intdata);
576 }
577
578 /* Enable or disable Tx & Rx checksum offload engines */
579 static int smsc95xx_set_features(struct net_device *netdev,
580 netdev_features_t features)
581 {
582 struct usbnet *dev = netdev_priv(netdev);
583 u32 read_buf;
584 int ret;
585
586 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
587 check_warn_return(ret, "Failed to read COE_CR: %d\n", ret);
588
589 if (features & NETIF_F_HW_CSUM)
590 read_buf |= Tx_COE_EN_;
591 else
592 read_buf &= ~Tx_COE_EN_;
593
594 if (features & NETIF_F_RXCSUM)
595 read_buf |= Rx_COE_EN_;
596 else
597 read_buf &= ~Rx_COE_EN_;
598
599 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
600 check_warn_return(ret, "Failed to write COE_CR: %d\n", ret);
601
602 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
603 return 0;
604 }
605
606 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
607 {
608 return MAX_EEPROM_SIZE;
609 }
610
611 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
612 struct ethtool_eeprom *ee, u8 *data)
613 {
614 struct usbnet *dev = netdev_priv(netdev);
615
616 ee->magic = LAN95XX_EEPROM_MAGIC;
617
618 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
619 }
620
621 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
622 struct ethtool_eeprom *ee, u8 *data)
623 {
624 struct usbnet *dev = netdev_priv(netdev);
625
626 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
627 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
628 ee->magic);
629 return -EINVAL;
630 }
631
632 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
633 }
634
635 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
636 {
637 /* all smsc95xx registers */
638 return COE_CR - ID_REV + 1;
639 }
640
641 static void
642 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
643 void *buf)
644 {
645 struct usbnet *dev = netdev_priv(netdev);
646 unsigned int i, j;
647 int retval;
648 u32 *data = buf;
649
650 retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
651 if (retval < 0) {
652 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
653 return;
654 }
655
656 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
657 retval = smsc95xx_read_reg(dev, i, &data[j]);
658 if (retval < 0) {
659 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
660 return;
661 }
662 }
663 }
664
665 static void smsc95xx_ethtool_get_wol(struct net_device *net,
666 struct ethtool_wolinfo *wolinfo)
667 {
668 struct usbnet *dev = netdev_priv(net);
669 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
670
671 wolinfo->supported = SUPPORTED_WAKE;
672 wolinfo->wolopts = pdata->wolopts;
673 }
674
675 static int smsc95xx_ethtool_set_wol(struct net_device *net,
676 struct ethtool_wolinfo *wolinfo)
677 {
678 struct usbnet *dev = netdev_priv(net);
679 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
680
681 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
682 return 0;
683 }
684
685 static const struct ethtool_ops smsc95xx_ethtool_ops = {
686 .get_link = usbnet_get_link,
687 .nway_reset = usbnet_nway_reset,
688 .get_drvinfo = usbnet_get_drvinfo,
689 .get_msglevel = usbnet_get_msglevel,
690 .set_msglevel = usbnet_set_msglevel,
691 .get_settings = usbnet_get_settings,
692 .set_settings = usbnet_set_settings,
693 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
694 .get_eeprom = smsc95xx_ethtool_get_eeprom,
695 .set_eeprom = smsc95xx_ethtool_set_eeprom,
696 .get_regs_len = smsc95xx_ethtool_getregslen,
697 .get_regs = smsc95xx_ethtool_getregs,
698 .get_wol = smsc95xx_ethtool_get_wol,
699 .set_wol = smsc95xx_ethtool_set_wol,
700 };
701
702 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
703 {
704 struct usbnet *dev = netdev_priv(netdev);
705
706 if (!netif_running(netdev))
707 return -EINVAL;
708
709 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
710 }
711
712 static void smsc95xx_init_mac_address(struct usbnet *dev)
713 {
714 /* try reading mac address from EEPROM */
715 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
716 dev->net->dev_addr) == 0) {
717 if (is_valid_ether_addr(dev->net->dev_addr)) {
718 /* eeprom values are valid so use them */
719 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
720 return;
721 }
722 }
723
724 /* no eeprom, or eeprom values are invalid. generate random MAC */
725 eth_hw_addr_random(dev->net);
726 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
727 }
728
729 static int smsc95xx_set_mac_address(struct usbnet *dev)
730 {
731 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
732 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
733 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
734 int ret;
735
736 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
737 check_warn_return(ret, "Failed to write ADDRL: %d\n", ret);
738
739 ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
740 check_warn_return(ret, "Failed to write ADDRH: %d\n", ret);
741
742 return 0;
743 }
744
745 /* starts the TX path */
746 static int smsc95xx_start_tx_path(struct usbnet *dev)
747 {
748 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
749 unsigned long flags;
750 int ret;
751
752 /* Enable Tx at MAC */
753 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
754 pdata->mac_cr |= MAC_CR_TXEN_;
755 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
756
757 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
758 check_warn_return(ret, "Failed to write MAC_CR: %d\n", ret);
759
760 /* Enable Tx at SCSRs */
761 ret = smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
762 check_warn_return(ret, "Failed to write TX_CFG: %d\n", ret);
763
764 return 0;
765 }
766
767 /* Starts the Receive path */
768 static int smsc95xx_start_rx_path(struct usbnet *dev)
769 {
770 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
771 unsigned long flags;
772 int ret;
773
774 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
775 pdata->mac_cr |= MAC_CR_RXEN_;
776 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
777
778 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
779 check_warn_return(ret, "Failed to write MAC_CR: %d\n", ret);
780
781 return 0;
782 }
783
784 static int smsc95xx_phy_initialize(struct usbnet *dev)
785 {
786 int bmcr, ret, timeout = 0;
787
788 /* Initialize MII structure */
789 dev->mii.dev = dev->net;
790 dev->mii.mdio_read = smsc95xx_mdio_read;
791 dev->mii.mdio_write = smsc95xx_mdio_write;
792 dev->mii.phy_id_mask = 0x1f;
793 dev->mii.reg_num_mask = 0x1f;
794 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
795
796 /* reset phy and wait for reset to complete */
797 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
798
799 do {
800 msleep(10);
801 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
802 timeout++;
803 } while ((bmcr & BMCR_RESET) && (timeout < 100));
804
805 if (timeout >= 100) {
806 netdev_warn(dev->net, "timeout on PHY Reset");
807 return -EIO;
808 }
809
810 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
811 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
812 ADVERTISE_PAUSE_ASYM);
813
814 /* read to clear */
815 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
816 check_warn_return(ret, "Failed to read PHY_INT_SRC during init");
817
818 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
819 PHY_INT_MASK_DEFAULT_);
820 mii_nway_restart(&dev->mii);
821
822 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
823 return 0;
824 }
825
826 static int smsc95xx_reset(struct usbnet *dev)
827 {
828 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
829 u32 read_buf, write_buf, burst_cap;
830 int ret = 0, timeout;
831
832 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
833
834 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
835 check_warn_return(ret, "Failed to write HW_CFG_LRST_ bit in HW_CFG\n");
836
837 timeout = 0;
838 do {
839 msleep(10);
840 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
841 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
842 timeout++;
843 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
844
845 if (timeout >= 100) {
846 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
847 return ret;
848 }
849
850 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
851 check_warn_return(ret, "Failed to write PM_CTRL: %d\n", ret);
852
853 timeout = 0;
854 do {
855 msleep(10);
856 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
857 check_warn_return(ret, "Failed to read PM_CTRL: %d\n", ret);
858 timeout++;
859 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
860
861 if (timeout >= 100) {
862 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
863 return ret;
864 }
865
866 ret = smsc95xx_set_mac_address(dev);
867 if (ret < 0)
868 return ret;
869
870 netif_dbg(dev, ifup, dev->net,
871 "MAC Address: %pM\n", dev->net->dev_addr);
872
873 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
874 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
875
876 netif_dbg(dev, ifup, dev->net,
877 "Read Value from HW_CFG : 0x%08x\n", read_buf);
878
879 read_buf |= HW_CFG_BIR_;
880
881 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
882 check_warn_return(ret, "Failed to write HW_CFG_BIR_ bit in HW_CFG\n");
883
884 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
885 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
886 netif_dbg(dev, ifup, dev->net,
887 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
888 read_buf);
889
890 if (!turbo_mode) {
891 burst_cap = 0;
892 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
893 } else if (dev->udev->speed == USB_SPEED_HIGH) {
894 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
895 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
896 } else {
897 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
898 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
899 }
900
901 netif_dbg(dev, ifup, dev->net,
902 "rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
903
904 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
905 check_warn_return(ret, "Failed to write BURST_CAP: %d\n", ret);
906
907 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
908 check_warn_return(ret, "Failed to read BURST_CAP: %d\n", ret);
909
910 netif_dbg(dev, ifup, dev->net,
911 "Read Value from BURST_CAP after writing: 0x%08x\n",
912 read_buf);
913
914 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
915 check_warn_return(ret, "Failed to write BULK_IN_DLY: %d\n", ret);
916
917 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
918 check_warn_return(ret, "Failed to read BULK_IN_DLY: %d\n", ret);
919
920 netif_dbg(dev, ifup, dev->net,
921 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
922 read_buf);
923
924 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
925 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
926
927 netif_dbg(dev, ifup, dev->net,
928 "Read Value from HW_CFG: 0x%08x\n", read_buf);
929
930 if (turbo_mode)
931 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
932
933 read_buf &= ~HW_CFG_RXDOFF_;
934
935 /* set Rx data offset=2, Make IP header aligns on word boundary. */
936 read_buf |= NET_IP_ALIGN << 9;
937
938 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
939 check_warn_return(ret, "Failed to write HW_CFG: %d\n", ret);
940
941 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
942 check_warn_return(ret, "Failed to read HW_CFG: %d\n", ret);
943
944 netif_dbg(dev, ifup, dev->net,
945 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
946
947 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
948 check_warn_return(ret, "Failed to write INT_STS: %d\n", ret);
949
950 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
951 check_warn_return(ret, "Failed to read ID_REV: %d\n", ret);
952 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
953
954 /* Configure GPIO pins as LED outputs */
955 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
956 LED_GPIO_CFG_FDX_LED;
957 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
958 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d\n", ret);
959
960 /* Init Tx */
961 ret = smsc95xx_write_reg(dev, FLOW, 0);
962 check_warn_return(ret, "Failed to write FLOW: %d\n", ret);
963
964 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
965 check_warn_return(ret, "Failed to write AFC_CFG: %d\n", ret);
966
967 /* Don't need mac_cr_lock during initialisation */
968 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
969 check_warn_return(ret, "Failed to read MAC_CR: %d\n", ret);
970
971 /* Init Rx */
972 /* Set Vlan */
973 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
974 check_warn_return(ret, "Failed to write VLAN1: %d\n", ret);
975
976 /* Enable or disable checksum offload engines */
977 ret = smsc95xx_set_features(dev->net, dev->net->features);
978 check_warn_return(ret, "Failed to set checksum offload features");
979
980 smsc95xx_set_multicast(dev->net);
981
982 ret = smsc95xx_phy_initialize(dev);
983 check_warn_return(ret, "Failed to init PHY");
984
985 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
986 check_warn_return(ret, "Failed to read INT_EP_CTL: %d\n", ret);
987
988 /* enable PHY interrupts */
989 read_buf |= INT_EP_CTL_PHY_INT_;
990
991 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
992 check_warn_return(ret, "Failed to write INT_EP_CTL: %d\n", ret);
993
994 ret = smsc95xx_start_tx_path(dev);
995 check_warn_return(ret, "Failed to start TX path");
996
997 ret = smsc95xx_start_rx_path(dev);
998 check_warn_return(ret, "Failed to start RX path");
999
1000 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1001 return 0;
1002 }
1003
1004 static const struct net_device_ops smsc95xx_netdev_ops = {
1005 .ndo_open = usbnet_open,
1006 .ndo_stop = usbnet_stop,
1007 .ndo_start_xmit = usbnet_start_xmit,
1008 .ndo_tx_timeout = usbnet_tx_timeout,
1009 .ndo_change_mtu = usbnet_change_mtu,
1010 .ndo_set_mac_address = eth_mac_addr,
1011 .ndo_validate_addr = eth_validate_addr,
1012 .ndo_do_ioctl = smsc95xx_ioctl,
1013 .ndo_set_rx_mode = smsc95xx_set_multicast,
1014 .ndo_set_features = smsc95xx_set_features,
1015 };
1016
1017 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1018 {
1019 struct smsc95xx_priv *pdata = NULL;
1020 int ret;
1021
1022 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1023
1024 ret = usbnet_get_endpoints(dev, intf);
1025 check_warn_return(ret, "usbnet_get_endpoints failed: %d\n", ret);
1026
1027 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1028 GFP_KERNEL);
1029
1030 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1031 if (!pdata) {
1032 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
1033 return -ENOMEM;
1034 }
1035
1036 spin_lock_init(&pdata->mac_cr_lock);
1037
1038 if (DEFAULT_TX_CSUM_ENABLE)
1039 dev->net->features |= NETIF_F_HW_CSUM;
1040 if (DEFAULT_RX_CSUM_ENABLE)
1041 dev->net->features |= NETIF_F_RXCSUM;
1042
1043 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1044
1045 smsc95xx_init_mac_address(dev);
1046
1047 /* Init all registers */
1048 ret = smsc95xx_reset(dev);
1049
1050 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1051 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1052 dev->net->flags |= IFF_MULTICAST;
1053 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1054 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1055 return 0;
1056 }
1057
1058 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1059 {
1060 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1061 if (pdata) {
1062 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1063 kfree(pdata);
1064 pdata = NULL;
1065 dev->data[0] = 0;
1066 }
1067 }
1068
1069 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1070 {
1071 struct usbnet *dev = usb_get_intfdata(intf);
1072 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1073 int ret;
1074 u32 val;
1075
1076 ret = usbnet_suspend(intf, message);
1077 check_warn_return(ret, "usbnet_suspend error");
1078
1079 /* if no wol options set, enter lowest power SUSPEND2 mode */
1080 if (!(pdata->wolopts & SUPPORTED_WAKE)) {
1081 netdev_info(dev->net, "entering SUSPEND2 mode");
1082
1083 /* disable energy detect (link up) & wake up events */
1084 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1085 check_warn_return(ret, "Error reading WUCSR");
1086
1087 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1088
1089 ret = smsc95xx_write_reg(dev, WUCSR, val);
1090 check_warn_return(ret, "Error writing WUCSR");
1091
1092 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1093 check_warn_return(ret, "Error reading PM_CTRL");
1094
1095 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1096
1097 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1098 check_warn_return(ret, "Error writing PM_CTRL");
1099
1100 /* enter suspend2 mode */
1101 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1102 check_warn_return(ret, "Error reading PM_CTRL");
1103
1104 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1105 val |= PM_CTL_SUS_MODE_2;
1106
1107 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1108 check_warn_return(ret, "Error writing PM_CTRL");
1109
1110 return 0;
1111 }
1112
1113 if (pdata->wolopts & WAKE_MAGIC) {
1114 /* clear any pending magic packet status */
1115 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1116 check_warn_return(ret, "Error reading WUCSR");
1117
1118 val |= WUCSR_MPR_;
1119
1120 ret = smsc95xx_write_reg(dev, WUCSR, val);
1121 check_warn_return(ret, "Error writing WUCSR");
1122 }
1123
1124 /* enable/disable magic packup wake */
1125 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1126 check_warn_return(ret, "Error reading WUCSR");
1127
1128 if (pdata->wolopts & WAKE_MAGIC) {
1129 netdev_info(dev->net, "enabling magic packet wakeup");
1130 val |= WUCSR_MPEN_;
1131 } else {
1132 netdev_info(dev->net, "disabling magic packet wakeup");
1133 val &= ~WUCSR_MPEN_;
1134 }
1135
1136 ret = smsc95xx_write_reg(dev, WUCSR, val);
1137 check_warn_return(ret, "Error writing WUCSR");
1138
1139 /* enable wol wakeup source */
1140 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1141 check_warn_return(ret, "Error reading PM_CTRL");
1142
1143 val |= PM_CTL_WOL_EN_;
1144
1145 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1146 check_warn_return(ret, "Error writing PM_CTRL");
1147
1148 /* enable receiver */
1149 smsc95xx_start_rx_path(dev);
1150
1151 /* some wol options are enabled, so enter SUSPEND0 */
1152 netdev_info(dev->net, "entering SUSPEND0 mode");
1153
1154 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1155 check_warn_return(ret, "Error reading PM_CTRL");
1156
1157 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1158 val |= PM_CTL_SUS_MODE_0;
1159
1160 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1161 check_warn_return(ret, "Error writing PM_CTRL");
1162
1163 /* clear wol status */
1164 val &= ~PM_CTL_WUPS_;
1165 val |= PM_CTL_WUPS_WOL_;
1166 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1167 check_warn_return(ret, "Error writing PM_CTRL");
1168
1169 /* read back PM_CTRL */
1170 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1171 check_warn_return(ret, "Error reading PM_CTRL");
1172
1173 smsc95xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1174
1175 return 0;
1176 }
1177
1178 static int smsc95xx_resume(struct usb_interface *intf)
1179 {
1180 struct usbnet *dev = usb_get_intfdata(intf);
1181 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1182 int ret;
1183 u32 val;
1184
1185 BUG_ON(!dev);
1186
1187 if (pdata->wolopts & WAKE_MAGIC) {
1188 smsc95xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1189
1190 /* Disable magic packup wake */
1191 ret = smsc95xx_read_reg(dev, WUCSR, &val);
1192 check_warn_return(ret, "Error reading WUCSR");
1193
1194 val &= ~WUCSR_MPEN_;
1195
1196 ret = smsc95xx_write_reg(dev, WUCSR, val);
1197 check_warn_return(ret, "Error writing WUCSR");
1198
1199 /* clear wake-up status */
1200 ret = smsc95xx_read_reg(dev, PM_CTRL, &val);
1201 check_warn_return(ret, "Error reading PM_CTRL");
1202
1203 val &= ~PM_CTL_WOL_EN_;
1204 val |= PM_CTL_WUPS_;
1205
1206 ret = smsc95xx_write_reg(dev, PM_CTRL, val);
1207 check_warn_return(ret, "Error writing PM_CTRL");
1208 }
1209
1210 return usbnet_resume(intf);
1211 check_warn_return(ret, "usbnet_resume error");
1212
1213 return 0;
1214 }
1215
1216 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1217 {
1218 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1219 skb->ip_summed = CHECKSUM_COMPLETE;
1220 skb_trim(skb, skb->len - 2);
1221 }
1222
1223 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1224 {
1225 while (skb->len > 0) {
1226 u32 header, align_count;
1227 struct sk_buff *ax_skb;
1228 unsigned char *packet;
1229 u16 size;
1230
1231 memcpy(&header, skb->data, sizeof(header));
1232 le32_to_cpus(&header);
1233 skb_pull(skb, 4 + NET_IP_ALIGN);
1234 packet = skb->data;
1235
1236 /* get the packet length */
1237 size = (u16)((header & RX_STS_FL_) >> 16);
1238 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1239
1240 if (unlikely(header & RX_STS_ES_)) {
1241 netif_dbg(dev, rx_err, dev->net,
1242 "Error header=0x%08x\n", header);
1243 dev->net->stats.rx_errors++;
1244 dev->net->stats.rx_dropped++;
1245
1246 if (header & RX_STS_CRC_) {
1247 dev->net->stats.rx_crc_errors++;
1248 } else {
1249 if (header & (RX_STS_TL_ | RX_STS_RF_))
1250 dev->net->stats.rx_frame_errors++;
1251
1252 if ((header & RX_STS_LE_) &&
1253 (!(header & RX_STS_FT_)))
1254 dev->net->stats.rx_length_errors++;
1255 }
1256 } else {
1257 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1258 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1259 netif_dbg(dev, rx_err, dev->net,
1260 "size err header=0x%08x\n", header);
1261 return 0;
1262 }
1263
1264 /* last frame in this batch */
1265 if (skb->len == size) {
1266 if (dev->net->features & NETIF_F_RXCSUM)
1267 smsc95xx_rx_csum_offload(skb);
1268 skb_trim(skb, skb->len - 4); /* remove fcs */
1269 skb->truesize = size + sizeof(struct sk_buff);
1270
1271 return 1;
1272 }
1273
1274 ax_skb = skb_clone(skb, GFP_ATOMIC);
1275 if (unlikely(!ax_skb)) {
1276 netdev_warn(dev->net, "Error allocating skb\n");
1277 return 0;
1278 }
1279
1280 ax_skb->len = size;
1281 ax_skb->data = packet;
1282 skb_set_tail_pointer(ax_skb, size);
1283
1284 if (dev->net->features & NETIF_F_RXCSUM)
1285 smsc95xx_rx_csum_offload(ax_skb);
1286 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1287 ax_skb->truesize = size + sizeof(struct sk_buff);
1288
1289 usbnet_skb_return(dev, ax_skb);
1290 }
1291
1292 skb_pull(skb, size);
1293
1294 /* padding bytes before the next frame starts */
1295 if (skb->len)
1296 skb_pull(skb, align_count);
1297 }
1298
1299 if (unlikely(skb->len < 0)) {
1300 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1301 return 0;
1302 }
1303
1304 return 1;
1305 }
1306
1307 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1308 {
1309 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1310 u16 high_16 = low_16 + skb->csum_offset;
1311 return (high_16 << 16) | low_16;
1312 }
1313
1314 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1315 struct sk_buff *skb, gfp_t flags)
1316 {
1317 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1318 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1319 u32 tx_cmd_a, tx_cmd_b;
1320
1321 /* We do not advertise SG, so skbs should be already linearized */
1322 BUG_ON(skb_shinfo(skb)->nr_frags);
1323
1324 if (skb_headroom(skb) < overhead) {
1325 struct sk_buff *skb2 = skb_copy_expand(skb,
1326 overhead, 0, flags);
1327 dev_kfree_skb_any(skb);
1328 skb = skb2;
1329 if (!skb)
1330 return NULL;
1331 }
1332
1333 if (csum) {
1334 if (skb->len <= 45) {
1335 /* workaround - hardware tx checksum does not work
1336 * properly with extremely small packets */
1337 long csstart = skb_checksum_start_offset(skb);
1338 __wsum calc = csum_partial(skb->data + csstart,
1339 skb->len - csstart, 0);
1340 *((__sum16 *)(skb->data + csstart
1341 + skb->csum_offset)) = csum_fold(calc);
1342
1343 csum = false;
1344 } else {
1345 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1346 skb_push(skb, 4);
1347 memcpy(skb->data, &csum_preamble, 4);
1348 }
1349 }
1350
1351 skb_push(skb, 4);
1352 tx_cmd_b = (u32)(skb->len - 4);
1353 if (csum)
1354 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1355 cpu_to_le32s(&tx_cmd_b);
1356 memcpy(skb->data, &tx_cmd_b, 4);
1357
1358 skb_push(skb, 4);
1359 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1360 TX_CMD_A_LAST_SEG_;
1361 cpu_to_le32s(&tx_cmd_a);
1362 memcpy(skb->data, &tx_cmd_a, 4);
1363
1364 return skb;
1365 }
1366
1367 static const struct driver_info smsc95xx_info = {
1368 .description = "smsc95xx USB 2.0 Ethernet",
1369 .bind = smsc95xx_bind,
1370 .unbind = smsc95xx_unbind,
1371 .link_reset = smsc95xx_link_reset,
1372 .reset = smsc95xx_reset,
1373 .rx_fixup = smsc95xx_rx_fixup,
1374 .tx_fixup = smsc95xx_tx_fixup,
1375 .status = smsc95xx_status,
1376 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1377 };
1378
1379 static const struct usb_device_id products[] = {
1380 {
1381 /* SMSC9500 USB Ethernet Device */
1382 USB_DEVICE(0x0424, 0x9500),
1383 .driver_info = (unsigned long) &smsc95xx_info,
1384 },
1385 {
1386 /* SMSC9505 USB Ethernet Device */
1387 USB_DEVICE(0x0424, 0x9505),
1388 .driver_info = (unsigned long) &smsc95xx_info,
1389 },
1390 {
1391 /* SMSC9500A USB Ethernet Device */
1392 USB_DEVICE(0x0424, 0x9E00),
1393 .driver_info = (unsigned long) &smsc95xx_info,
1394 },
1395 {
1396 /* SMSC9505A USB Ethernet Device */
1397 USB_DEVICE(0x0424, 0x9E01),
1398 .driver_info = (unsigned long) &smsc95xx_info,
1399 },
1400 {
1401 /* SMSC9512/9514 USB Hub & Ethernet Device */
1402 USB_DEVICE(0x0424, 0xec00),
1403 .driver_info = (unsigned long) &smsc95xx_info,
1404 },
1405 {
1406 /* SMSC9500 USB Ethernet Device (SAL10) */
1407 USB_DEVICE(0x0424, 0x9900),
1408 .driver_info = (unsigned long) &smsc95xx_info,
1409 },
1410 {
1411 /* SMSC9505 USB Ethernet Device (SAL10) */
1412 USB_DEVICE(0x0424, 0x9901),
1413 .driver_info = (unsigned long) &smsc95xx_info,
1414 },
1415 {
1416 /* SMSC9500A USB Ethernet Device (SAL10) */
1417 USB_DEVICE(0x0424, 0x9902),
1418 .driver_info = (unsigned long) &smsc95xx_info,
1419 },
1420 {
1421 /* SMSC9505A USB Ethernet Device (SAL10) */
1422 USB_DEVICE(0x0424, 0x9903),
1423 .driver_info = (unsigned long) &smsc95xx_info,
1424 },
1425 {
1426 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1427 USB_DEVICE(0x0424, 0x9904),
1428 .driver_info = (unsigned long) &smsc95xx_info,
1429 },
1430 {
1431 /* SMSC9500A USB Ethernet Device (HAL) */
1432 USB_DEVICE(0x0424, 0x9905),
1433 .driver_info = (unsigned long) &smsc95xx_info,
1434 },
1435 {
1436 /* SMSC9505A USB Ethernet Device (HAL) */
1437 USB_DEVICE(0x0424, 0x9906),
1438 .driver_info = (unsigned long) &smsc95xx_info,
1439 },
1440 {
1441 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1442 USB_DEVICE(0x0424, 0x9907),
1443 .driver_info = (unsigned long) &smsc95xx_info,
1444 },
1445 {
1446 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1447 USB_DEVICE(0x0424, 0x9908),
1448 .driver_info = (unsigned long) &smsc95xx_info,
1449 },
1450 {
1451 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1452 USB_DEVICE(0x0424, 0x9909),
1453 .driver_info = (unsigned long) &smsc95xx_info,
1454 },
1455 {
1456 /* SMSC LAN9530 USB Ethernet Device */
1457 USB_DEVICE(0x0424, 0x9530),
1458 .driver_info = (unsigned long) &smsc95xx_info,
1459 },
1460 {
1461 /* SMSC LAN9730 USB Ethernet Device */
1462 USB_DEVICE(0x0424, 0x9730),
1463 .driver_info = (unsigned long) &smsc95xx_info,
1464 },
1465 {
1466 /* SMSC LAN89530 USB Ethernet Device */
1467 USB_DEVICE(0x0424, 0x9E08),
1468 .driver_info = (unsigned long) &smsc95xx_info,
1469 },
1470 { }, /* END */
1471 };
1472 MODULE_DEVICE_TABLE(usb, products);
1473
1474 static struct usb_driver smsc95xx_driver = {
1475 .name = "smsc95xx",
1476 .id_table = products,
1477 .probe = usbnet_probe,
1478 .suspend = smsc95xx_suspend,
1479 .resume = smsc95xx_resume,
1480 .reset_resume = smsc95xx_resume,
1481 .disconnect = usbnet_disconnect,
1482 .disable_hub_initiated_lpm = 1,
1483 };
1484
1485 module_usb_driver(smsc95xx_driver);
1486
1487 MODULE_AUTHOR("Nancy Lin");
1488 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
1489 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1490 MODULE_LICENSE("GPL");
Ubuntu Artful kernel mirror