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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
50struct smsc95xx_priv {
51 u32 mac_cr;
52 u32 hash_hi;
53 u32 hash_lo;
54 spinlock_t mac_cr_lock;
55};
56
57struct usb_context {
58 struct usb_ctrlrequest req;
59 struct usbnet *dev;
60};
61
62static int turbo_mode = true;
63module_param(turbo_mode, bool, 0644);
64MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
65
66static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data)
67{
68 u32 *buf = kmalloc(4, GFP_KERNEL);
69 int ret;
70
71 BUG_ON(!dev);
72
73 if (!buf)
74 return -ENOMEM;
75
76 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
77 USB_VENDOR_REQUEST_READ_REGISTER,
78 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
79 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
80
81 if (unlikely(ret < 0))
82 netdev_warn(dev->net, "Failed to read register index 0x%08x\n", index);
83
84 le32_to_cpus(buf);
85 *data = *buf;
86 kfree(buf);
87
88 return ret;
89}
90
91static int smsc95xx_write_reg(struct usbnet *dev, u32 index, u32 data)
92{
93 u32 *buf = kmalloc(4, GFP_KERNEL);
94 int ret;
95
96 BUG_ON(!dev);
97
98 if (!buf)
99 return -ENOMEM;
100
101 *buf = data;
102 cpu_to_le32s(buf);
103
104 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
105 USB_VENDOR_REQUEST_WRITE_REGISTER,
106 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
107 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
108
109 if (unlikely(ret < 0))
110 netdev_warn(dev->net, "Failed to write register index 0x%08x\n", index);
111
112 kfree(buf);
113
114 return ret;
115}
116
117/* Loop until the read is completed with timeout
118 * called with phy_mutex held */
119static int smsc95xx_phy_wait_not_busy(struct usbnet *dev)
120{
121 unsigned long start_time = jiffies;
122 u32 val;
123
124 do {
125 smsc95xx_read_reg(dev, MII_ADDR, &val);
126 if (!(val & MII_BUSY_))
127 return 0;
128 } while (!time_after(jiffies, start_time + HZ));
129
130 return -EIO;
131}
132
133static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
134{
135 struct usbnet *dev = netdev_priv(netdev);
136 u32 val, addr;
137
138 mutex_lock(&dev->phy_mutex);
139
140 /* confirm MII not busy */
141 if (smsc95xx_phy_wait_not_busy(dev)) {
142 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
143 mutex_unlock(&dev->phy_mutex);
144 return -EIO;
145 }
146
147 /* set the address, index & direction (read from PHY) */
148 phy_id &= dev->mii.phy_id_mask;
149 idx &= dev->mii.reg_num_mask;
150 addr = (phy_id << 11) | (idx << 6) | MII_READ_;
151 smsc95xx_write_reg(dev, MII_ADDR, addr);
152
153 if (smsc95xx_phy_wait_not_busy(dev)) {
154 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
155 mutex_unlock(&dev->phy_mutex);
156 return -EIO;
157 }
158
159 smsc95xx_read_reg(dev, MII_DATA, &val);
160
161 mutex_unlock(&dev->phy_mutex);
162
163 return (u16)(val & 0xFFFF);
164}
165
166static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
167 int regval)
168{
169 struct usbnet *dev = netdev_priv(netdev);
170 u32 val, addr;
171
172 mutex_lock(&dev->phy_mutex);
173
174 /* confirm MII not busy */
175 if (smsc95xx_phy_wait_not_busy(dev)) {
176 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
177 mutex_unlock(&dev->phy_mutex);
178 return;
179 }
180
181 val = regval;
182 smsc95xx_write_reg(dev, MII_DATA, val);
183
184 /* set the address, index & direction (write to PHY) */
185 phy_id &= dev->mii.phy_id_mask;
186 idx &= dev->mii.reg_num_mask;
187 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
188 smsc95xx_write_reg(dev, MII_ADDR, addr);
189
190 if (smsc95xx_phy_wait_not_busy(dev))
191 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
192
193 mutex_unlock(&dev->phy_mutex);
194}
195
196static int smsc95xx_wait_eeprom(struct usbnet *dev)
197{
198 unsigned long start_time = jiffies;
199 u32 val;
200
201 do {
202 smsc95xx_read_reg(dev, E2P_CMD, &val);
203 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
204 break;
205 udelay(40);
206 } while (!time_after(jiffies, start_time + HZ));
207
208 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
209 netdev_warn(dev->net, "EEPROM read operation timeout\n");
210 return -EIO;
211 }
212
213 return 0;
214}
215
216static int smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
217{
218 unsigned long start_time = jiffies;
219 u32 val;
220
221 do {
222 smsc95xx_read_reg(dev, E2P_CMD, &val);
223
224 if (!(val & E2P_CMD_BUSY_))
225 return 0;
226
227 udelay(40);
228 } while (!time_after(jiffies, start_time + HZ));
229
230 netdev_warn(dev->net, "EEPROM is busy\n");
231 return -EIO;
232}
233
234static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
235 u8 *data)
236{
237 u32 val;
238 int i, ret;
239
240 BUG_ON(!dev);
241 BUG_ON(!data);
242
243 ret = smsc95xx_eeprom_confirm_not_busy(dev);
244 if (ret)
245 return ret;
246
247 for (i = 0; i < length; i++) {
248 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
249 smsc95xx_write_reg(dev, E2P_CMD, val);
250
251 ret = smsc95xx_wait_eeprom(dev);
252 if (ret < 0)
253 return ret;
254
255 smsc95xx_read_reg(dev, E2P_DATA, &val);
256
257 data[i] = val & 0xFF;
258 offset++;
259 }
260
261 return 0;
262}
263
264static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
265 u8 *data)
266{
267 u32 val;
268 int i, ret;
269
270 BUG_ON(!dev);
271 BUG_ON(!data);
272
273 ret = smsc95xx_eeprom_confirm_not_busy(dev);
274 if (ret)
275 return ret;
276
277 /* Issue write/erase enable command */
278 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
279 smsc95xx_write_reg(dev, E2P_CMD, val);
280
281 ret = smsc95xx_wait_eeprom(dev);
282 if (ret < 0)
283 return ret;
284
285 for (i = 0; i < length; i++) {
286
287 /* Fill data register */
288 val = data[i];
289 smsc95xx_write_reg(dev, E2P_DATA, val);
290
291 /* Send "write" command */
292 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
293 smsc95xx_write_reg(dev, E2P_CMD, val);
294
295 ret = smsc95xx_wait_eeprom(dev);
296 if (ret < 0)
297 return ret;
298
299 offset++;
300 }
301
302 return 0;
303}
304
305static void smsc95xx_async_cmd_callback(struct urb *urb)
306{
307 struct usb_context *usb_context = urb->context;
308 struct usbnet *dev = usb_context->dev;
309 int status = urb->status;
310
311 if (status < 0)
312 netdev_warn(dev->net, "async callback failed with %d\n", status);
313
314 kfree(usb_context);
315 usb_free_urb(urb);
316}
317
318static int smsc95xx_write_reg_async(struct usbnet *dev, u16 index, u32 *data)
319{
320 struct usb_context *usb_context;
321 int status;
322 struct urb *urb;
323 const u16 size = 4;
324
325 urb = usb_alloc_urb(0, GFP_ATOMIC);
326 if (!urb) {
327 netdev_warn(dev->net, "Error allocating URB\n");
328 return -ENOMEM;
329 }
330
331 usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC);
332 if (usb_context == NULL) {
333 netdev_warn(dev->net, "Error allocating control msg\n");
334 usb_free_urb(urb);
335 return -ENOMEM;
336 }
337
338 usb_context->req.bRequestType =
339 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
340 usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER;
341 usb_context->req.wValue = 00;
342 usb_context->req.wIndex = cpu_to_le16(index);
343 usb_context->req.wLength = cpu_to_le16(size);
344
345 usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
346 (void *)&usb_context->req, data, size,
347 smsc95xx_async_cmd_callback,
348 (void *)usb_context);
349
350 status = usb_submit_urb(urb, GFP_ATOMIC);
351 if (status < 0) {
352 netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
353 status);
354 kfree(usb_context);
355 usb_free_urb(urb);
356 }
357
358 return status;
359}
360
361/* returns hash bit number for given MAC address
362 * example:
363 * 01 00 5E 00 00 01 -> returns bit number 31 */
364static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
365{
366 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
367}
368
369static void smsc95xx_set_multicast(struct net_device *netdev)
370{
371 struct usbnet *dev = netdev_priv(netdev);
372 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
373 unsigned long flags;
374
375 pdata->hash_hi = 0;
376 pdata->hash_lo = 0;
377
378 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
379
380 if (dev->net->flags & IFF_PROMISC) {
381 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
382 pdata->mac_cr |= MAC_CR_PRMS_;
383 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
384 } else if (dev->net->flags & IFF_ALLMULTI) {
385 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
386 pdata->mac_cr |= MAC_CR_MCPAS_;
387 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
388 } else if (!netdev_mc_empty(dev->net)) {
389 struct netdev_hw_addr *ha;
390
391 pdata->mac_cr |= MAC_CR_HPFILT_;
392 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
393
394 netdev_for_each_mc_addr(ha, netdev) {
395 u32 bitnum = smsc95xx_hash(ha->addr);
396 u32 mask = 0x01 << (bitnum & 0x1F);
397 if (bitnum & 0x20)
398 pdata->hash_hi |= mask;
399 else
400 pdata->hash_lo |= mask;
401 }
402
403 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
404 pdata->hash_hi, pdata->hash_lo);
405 } else {
406 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
407 pdata->mac_cr &=
408 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
409 }
410
411 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
412
413 /* Initiate async writes, as we can't wait for completion here */
414 smsc95xx_write_reg_async(dev, HASHH, &pdata->hash_hi);
415 smsc95xx_write_reg_async(dev, HASHL, &pdata->hash_lo);
416 smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
417}
418
419static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
420 u16 lcladv, u16 rmtadv)
421{
422 u32 flow, afc_cfg = 0;
423
424 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
425 if (ret < 0) {
426 netdev_warn(dev->net, "error reading AFC_CFG\n");
427 return;
428 }
429
430 if (duplex == DUPLEX_FULL) {
431 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
432
433 if (cap & FLOW_CTRL_RX)
434 flow = 0xFFFF0002;
435 else
436 flow = 0;
437
438 if (cap & FLOW_CTRL_TX)
439 afc_cfg |= 0xF;
440 else
441 afc_cfg &= ~0xF;
442
443 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
444 cap & FLOW_CTRL_RX ? "enabled" : "disabled",
445 cap & FLOW_CTRL_TX ? "enabled" : "disabled");
446 } else {
447 netif_dbg(dev, link, dev->net, "half duplex\n");
448 flow = 0;
449 afc_cfg |= 0xF;
450 }
451
452 smsc95xx_write_reg(dev, FLOW, flow);
453 smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
454}
455
456static int smsc95xx_link_reset(struct usbnet *dev)
457{
458 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
459 struct mii_if_info *mii = &dev->mii;
460 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
461 unsigned long flags;
462 u16 lcladv, rmtadv;
463 u32 intdata;
464
465 /* clear interrupt status */
466 smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
467 intdata = 0xFFFFFFFF;
468 smsc95xx_write_reg(dev, INT_STS, intdata);
469
470 mii_check_media(mii, 1, 1);
471 mii_ethtool_gset(&dev->mii, &ecmd);
472 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
473 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
474
475 netif_dbg(dev, link, dev->net,
476 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
477 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
478
479 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
480 if (ecmd.duplex != DUPLEX_FULL) {
481 pdata->mac_cr &= ~MAC_CR_FDPX_;
482 pdata->mac_cr |= MAC_CR_RCVOWN_;
483 } else {
484 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
485 pdata->mac_cr |= MAC_CR_FDPX_;
486 }
487 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
488
489 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
490
491 smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
492
493 return 0;
494}
495
496static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
497{
498 u32 intdata;
499
500 if (urb->actual_length != 4) {
501 netdev_warn(dev->net, "unexpected urb length %d\n",
502 urb->actual_length);
503 return;
504 }
505
506 memcpy(&intdata, urb->transfer_buffer, 4);
507 le32_to_cpus(&intdata);
508
509 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
510
511 if (intdata & INT_ENP_PHY_INT_)
512 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
513 else
514 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
515 intdata);
516}
517
518/* Enable or disable Tx & Rx checksum offload engines */
519static int smsc95xx_set_features(struct net_device *netdev, u32 features)
520{
521 struct usbnet *dev = netdev_priv(netdev);
522 u32 read_buf;
523 int ret;
524
525 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
526 if (ret < 0) {
527 netdev_warn(dev->net, "Failed to read COE_CR: %d\n", ret);
528 return ret;
529 }
530
531 if (features & NETIF_F_HW_CSUM)
532 read_buf |= Tx_COE_EN_;
533 else
534 read_buf &= ~Tx_COE_EN_;
535
536 if (features & NETIF_F_RXCSUM)
537 read_buf |= Rx_COE_EN_;
538 else
539 read_buf &= ~Rx_COE_EN_;
540
541 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
542 if (ret < 0) {
543 netdev_warn(dev->net, "Failed to write COE_CR: %d\n", ret);
544 return ret;
545 }
546
547 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
548 return 0;
549}
550
551static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
552{
553 return MAX_EEPROM_SIZE;
554}
555
556static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
557 struct ethtool_eeprom *ee, u8 *data)
558{
559 struct usbnet *dev = netdev_priv(netdev);
560
561 ee->magic = LAN95XX_EEPROM_MAGIC;
562
563 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
564}
565
566static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
567 struct ethtool_eeprom *ee, u8 *data)
568{
569 struct usbnet *dev = netdev_priv(netdev);
570
571 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
572 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
573 ee->magic);
574 return -EINVAL;
575 }
576
577 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
578}
579
580static const struct ethtool_ops smsc95xx_ethtool_ops = {
581 .get_link = usbnet_get_link,
582 .nway_reset = usbnet_nway_reset,
583 .get_drvinfo = usbnet_get_drvinfo,
584 .get_msglevel = usbnet_get_msglevel,
585 .set_msglevel = usbnet_set_msglevel,
586 .get_settings = usbnet_get_settings,
587 .set_settings = usbnet_set_settings,
588 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
589 .get_eeprom = smsc95xx_ethtool_get_eeprom,
590 .set_eeprom = smsc95xx_ethtool_set_eeprom,
591};
592
593static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
594{
595 struct usbnet *dev = netdev_priv(netdev);
596
597 if (!netif_running(netdev))
598 return -EINVAL;
599
600 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
601}
602
603static void smsc95xx_init_mac_address(struct usbnet *dev)
604{
605 /* try reading mac address from EEPROM */
606 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
607 dev->net->dev_addr) == 0) {
608 if (is_valid_ether_addr(dev->net->dev_addr)) {
609 /* eeprom values are valid so use them */
610 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
611 return;
612 }
613 }
614
615 /* no eeprom, or eeprom values are invalid. generate random MAC */
616 random_ether_addr(dev->net->dev_addr);
617 netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr\n");
618}
619
620static int smsc95xx_set_mac_address(struct usbnet *dev)
621{
622 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
623 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
624 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
625 int ret;
626
627 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
628 if (ret < 0) {
629 netdev_warn(dev->net, "Failed to write ADDRL: %d\n", ret);
630 return ret;
631 }
632
633 ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
634 if (ret < 0) {
635 netdev_warn(dev->net, "Failed to write ADDRH: %d\n", ret);
636 return ret;
637 }
638
639 return 0;
640}
641
642/* starts the TX path */
643static void smsc95xx_start_tx_path(struct usbnet *dev)
644{
645 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
646 unsigned long flags;
647 u32 reg_val;
648
649 /* Enable Tx at MAC */
650 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
651 pdata->mac_cr |= MAC_CR_TXEN_;
652 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
653
654 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
655
656 /* Enable Tx at SCSRs */
657 reg_val = TX_CFG_ON_;
658 smsc95xx_write_reg(dev, TX_CFG, reg_val);
659}
660
661/* Starts the Receive path */
662static void smsc95xx_start_rx_path(struct usbnet *dev)
663{
664 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
665 unsigned long flags;
666
667 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
668 pdata->mac_cr |= MAC_CR_RXEN_;
669 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
670
671 smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
672}
673
674static int smsc95xx_phy_initialize(struct usbnet *dev)
675{
676 int bmcr, timeout = 0;
677
678 /* Initialize MII structure */
679 dev->mii.dev = dev->net;
680 dev->mii.mdio_read = smsc95xx_mdio_read;
681 dev->mii.mdio_write = smsc95xx_mdio_write;
682 dev->mii.phy_id_mask = 0x1f;
683 dev->mii.reg_num_mask = 0x1f;
684 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
685
686 /* reset phy and wait for reset to complete */
687 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
688
689 do {
690 msleep(10);
691 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
692 timeout++;
693 } while ((bmcr & BMCR_RESET) && (timeout < 100));
694
695 if (timeout >= 100) {
696 netdev_warn(dev->net, "timeout on PHY Reset");
697 return -EIO;
698 }
699
700 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
701 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
702 ADVERTISE_PAUSE_ASYM);
703
704 /* read to clear */
705 smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
706
707 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
708 PHY_INT_MASK_DEFAULT_);
709 mii_nway_restart(&dev->mii);
710
711 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
712 return 0;
713}
714
715static int smsc95xx_reset(struct usbnet *dev)
716{
717 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
718 u32 read_buf, write_buf, burst_cap;
719 int ret = 0, timeout;
720
721 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
722
723 write_buf = HW_CFG_LRST_;
724 ret = smsc95xx_write_reg(dev, HW_CFG, write_buf);
725 if (ret < 0) {
726 netdev_warn(dev->net, "Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = %d\n",
727 ret);
728 return ret;
729 }
730
731 timeout = 0;
732 do {
733 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
734 if (ret < 0) {
735 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
736 return ret;
737 }
738 msleep(10);
739 timeout++;
740 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
741
742 if (timeout >= 100) {
743 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
744 return ret;
745 }
746
747 write_buf = PM_CTL_PHY_RST_;
748 ret = smsc95xx_write_reg(dev, PM_CTRL, write_buf);
749 if (ret < 0) {
750 netdev_warn(dev->net, "Failed to write PM_CTRL: %d\n", ret);
751 return ret;
752 }
753
754 timeout = 0;
755 do {
756 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
757 if (ret < 0) {
758 netdev_warn(dev->net, "Failed to read PM_CTRL: %d\n", ret);
759 return ret;
760 }
761 msleep(10);
762 timeout++;
763 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
764
765 if (timeout >= 100) {
766 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
767 return ret;
768 }
769
770 ret = smsc95xx_set_mac_address(dev);
771 if (ret < 0)
772 return ret;
773
774 netif_dbg(dev, ifup, dev->net,
775 "MAC Address: %pM\n", dev->net->dev_addr);
776
777 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
778 if (ret < 0) {
779 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
780 return ret;
781 }
782
783 netif_dbg(dev, ifup, dev->net,
784 "Read Value from HW_CFG : 0x%08x\n", read_buf);
785
786 read_buf |= HW_CFG_BIR_;
787
788 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
789 if (ret < 0) {
790 netdev_warn(dev->net, "Failed to write HW_CFG_BIR_ bit in HW_CFG register, ret = %d\n",
791 ret);
792 return ret;
793 }
794
795 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
796 if (ret < 0) {
797 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
798 return ret;
799 }
800 netif_dbg(dev, ifup, dev->net,
801 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
802 read_buf);
803
804 if (!turbo_mode) {
805 burst_cap = 0;
806 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
807 } else if (dev->udev->speed == USB_SPEED_HIGH) {
808 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
809 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
810 } else {
811 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
812 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
813 }
814
815 netif_dbg(dev, ifup, dev->net,
816 "rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
817
818 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
819 if (ret < 0) {
820 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
821 return ret;
822 }
823
824 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
825 if (ret < 0) {
826 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
827 return ret;
828 }
829 netif_dbg(dev, ifup, dev->net,
830 "Read Value from BURST_CAP after writing: 0x%08x\n",
831 read_buf);
832
833 read_buf = DEFAULT_BULK_IN_DELAY;
834 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
835 if (ret < 0) {
836 netdev_warn(dev->net, "ret = %d\n", ret);
837 return ret;
838 }
839
840 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
841 if (ret < 0) {
842 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
843 return ret;
844 }
845 netif_dbg(dev, ifup, dev->net,
846 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
847 read_buf);
848
849 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
850 if (ret < 0) {
851 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
852 return ret;
853 }
854 netif_dbg(dev, ifup, dev->net,
855 "Read Value from HW_CFG: 0x%08x\n", read_buf);
856
857 if (turbo_mode)
858 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
859
860 read_buf &= ~HW_CFG_RXDOFF_;
861
862 /* set Rx data offset=2, Make IP header aligns on word boundary. */
863 read_buf |= NET_IP_ALIGN << 9;
864
865 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
866 if (ret < 0) {
867 netdev_warn(dev->net, "Failed to write HW_CFG register, ret=%d\n",
868 ret);
869 return ret;
870 }
871
872 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
873 if (ret < 0) {
874 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
875 return ret;
876 }
877 netif_dbg(dev, ifup, dev->net,
878 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
879
880 write_buf = 0xFFFFFFFF;
881 ret = smsc95xx_write_reg(dev, INT_STS, write_buf);
882 if (ret < 0) {
883 netdev_warn(dev->net, "Failed to write INT_STS register, ret=%d\n",
884 ret);
885 return ret;
886 }
887
888 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
889 if (ret < 0) {
890 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
891 return ret;
892 }
893 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
894
895 /* Configure GPIO pins as LED outputs */
896 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
897 LED_GPIO_CFG_FDX_LED;
898 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
899 if (ret < 0) {
900 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG register, ret=%d\n",
901 ret);
902 return ret;
903 }
904
905 /* Init Tx */
906 write_buf = 0;
907 ret = smsc95xx_write_reg(dev, FLOW, write_buf);
908 if (ret < 0) {
909 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
910 return ret;
911 }
912
913 read_buf = AFC_CFG_DEFAULT;
914 ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
915 if (ret < 0) {
916 netdev_warn(dev->net, "Failed to write AFC_CFG: %d\n", ret);
917 return ret;
918 }
919
920 /* Don't need mac_cr_lock during initialisation */
921 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
922 if (ret < 0) {
923 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
924 return ret;
925 }
926
927 /* Init Rx */
928 /* Set Vlan */
929 write_buf = (u32)ETH_P_8021Q;
930 ret = smsc95xx_write_reg(dev, VLAN1, write_buf);
931 if (ret < 0) {
932 netdev_warn(dev->net, "Failed to write VAN1: %d\n", ret);
933 return ret;
934 }
935
936 /* Enable or disable checksum offload engines */
937 smsc95xx_set_features(dev->net, dev->net->features);
938
939 smsc95xx_set_multicast(dev->net);
940
941 if (smsc95xx_phy_initialize(dev) < 0)
942 return -EIO;
943
944 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
945 if (ret < 0) {
946 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
947 return ret;
948 }
949
950 /* enable PHY interrupts */
951 read_buf |= INT_EP_CTL_PHY_INT_;
952
953 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
954 if (ret < 0) {
955 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
956 return ret;
957 }
958
959 smsc95xx_start_tx_path(dev);
960 smsc95xx_start_rx_path(dev);
961
962 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
963 return 0;
964}
965
966static const struct net_device_ops smsc95xx_netdev_ops = {
967 .ndo_open = usbnet_open,
968 .ndo_stop = usbnet_stop,
969 .ndo_start_xmit = usbnet_start_xmit,
970 .ndo_tx_timeout = usbnet_tx_timeout,
971 .ndo_change_mtu = usbnet_change_mtu,
972 .ndo_set_mac_address = eth_mac_addr,
973 .ndo_validate_addr = eth_validate_addr,
974 .ndo_do_ioctl = smsc95xx_ioctl,
975 .ndo_set_multicast_list = smsc95xx_set_multicast,
976 .ndo_set_features = smsc95xx_set_features,
977};
978
979static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
980{
981 struct smsc95xx_priv *pdata = NULL;
982 int ret;
983
984 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
985
986 ret = usbnet_get_endpoints(dev, intf);
987 if (ret < 0) {
988 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
989 return ret;
990 }
991
992 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
993 GFP_KERNEL);
994
995 pdata = (struct smsc95xx_priv *)(dev->data[0]);
996 if (!pdata) {
997 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
998 return -ENOMEM;
999 }
1000
1001 spin_lock_init(&pdata->mac_cr_lock);
1002
1003 if (DEFAULT_TX_CSUM_ENABLE)
1004 dev->net->features |= NETIF_F_HW_CSUM;
1005 if (DEFAULT_RX_CSUM_ENABLE)
1006 dev->net->features |= NETIF_F_RXCSUM;
1007
1008 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1009
1010 smsc95xx_init_mac_address(dev);
1011
1012 /* Init all registers */
1013 ret = smsc95xx_reset(dev);
1014
1015 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1016 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1017 dev->net->flags |= IFF_MULTICAST;
1018 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1019 return 0;
1020}
1021
1022static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1023{
1024 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1025 if (pdata) {
1026 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1027 kfree(pdata);
1028 pdata = NULL;
1029 dev->data[0] = 0;
1030 }
1031}
1032
1033static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1034{
1035 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1036 skb->ip_summed = CHECKSUM_COMPLETE;
1037 skb_trim(skb, skb->len - 2);
1038}
1039
1040static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1041{
1042 while (skb->len > 0) {
1043 u32 header, align_count;
1044 struct sk_buff *ax_skb;
1045 unsigned char *packet;
1046 u16 size;
1047
1048 memcpy(&header, skb->data, sizeof(header));
1049 le32_to_cpus(&header);
1050 skb_pull(skb, 4 + NET_IP_ALIGN);
1051 packet = skb->data;
1052
1053 /* get the packet length */
1054 size = (u16)((header & RX_STS_FL_) >> 16);
1055 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1056
1057 if (unlikely(header & RX_STS_ES_)) {
1058 netif_dbg(dev, rx_err, dev->net,
1059 "Error header=0x%08x\n", header);
1060 dev->net->stats.rx_errors++;
1061 dev->net->stats.rx_dropped++;
1062
1063 if (header & RX_STS_CRC_) {
1064 dev->net->stats.rx_crc_errors++;
1065 } else {
1066 if (header & (RX_STS_TL_ | RX_STS_RF_))
1067 dev->net->stats.rx_frame_errors++;
1068
1069 if ((header & RX_STS_LE_) &&
1070 (!(header & RX_STS_FT_)))
1071 dev->net->stats.rx_length_errors++;
1072 }
1073 } else {
1074 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1075 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1076 netif_dbg(dev, rx_err, dev->net,
1077 "size err header=0x%08x\n", header);
1078 return 0;
1079 }
1080
1081 /* last frame in this batch */
1082 if (skb->len == size) {
1083 if (dev->net->features & NETIF_F_RXCSUM)
1084 smsc95xx_rx_csum_offload(skb);
1085 skb_trim(skb, skb->len - 4); /* remove fcs */
1086 skb->truesize = size + sizeof(struct sk_buff);
1087
1088 return 1;
1089 }
1090
1091 ax_skb = skb_clone(skb, GFP_ATOMIC);
1092 if (unlikely(!ax_skb)) {
1093 netdev_warn(dev->net, "Error allocating skb\n");
1094 return 0;
1095 }
1096
1097 ax_skb->len = size;
1098 ax_skb->data = packet;
1099 skb_set_tail_pointer(ax_skb, size);
1100
1101 if (dev->net->features & NETIF_F_RXCSUM)
1102 smsc95xx_rx_csum_offload(ax_skb);
1103 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1104 ax_skb->truesize = size + sizeof(struct sk_buff);
1105
1106 usbnet_skb_return(dev, ax_skb);
1107 }
1108
1109 skb_pull(skb, size);
1110
1111 /* padding bytes before the next frame starts */
1112 if (skb->len)
1113 skb_pull(skb, align_count);
1114 }
1115
1116 if (unlikely(skb->len < 0)) {
1117 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1118 return 0;
1119 }
1120
1121 return 1;
1122}
1123
1124static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1125{
1126 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1127 u16 high_16 = low_16 + skb->csum_offset;
1128 return (high_16 << 16) | low_16;
1129}
1130
1131static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1132 struct sk_buff *skb, gfp_t flags)
1133{
1134 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1135 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1136 u32 tx_cmd_a, tx_cmd_b;
1137
1138 /* We do not advertise SG, so skbs should be already linearized */
1139 BUG_ON(skb_shinfo(skb)->nr_frags);
1140
1141 if (skb_headroom(skb) < overhead) {
1142 struct sk_buff *skb2 = skb_copy_expand(skb,
1143 overhead, 0, flags);
1144 dev_kfree_skb_any(skb);
1145 skb = skb2;
1146 if (!skb)
1147 return NULL;
1148 }
1149
1150 if (csum) {
1151 if (skb->len <= 45) {
1152 /* workaround - hardware tx checksum does not work
1153 * properly with extremely small packets */
1154 long csstart = skb_checksum_start_offset(skb);
1155 __wsum calc = csum_partial(skb->data + csstart,
1156 skb->len - csstart, 0);
1157 *((__sum16 *)(skb->data + csstart
1158 + skb->csum_offset)) = csum_fold(calc);
1159
1160 csum = false;
1161 } else {
1162 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1163 skb_push(skb, 4);
1164 memcpy(skb->data, &csum_preamble, 4);
1165 }
1166 }
1167
1168 skb_push(skb, 4);
1169 tx_cmd_b = (u32)(skb->len - 4);
1170 if (csum)
1171 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1172 cpu_to_le32s(&tx_cmd_b);
1173 memcpy(skb->data, &tx_cmd_b, 4);
1174
1175 skb_push(skb, 4);
1176 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1177 TX_CMD_A_LAST_SEG_;
1178 cpu_to_le32s(&tx_cmd_a);
1179 memcpy(skb->data, &tx_cmd_a, 4);
1180
1181 return skb;
1182}
1183
1184static const struct driver_info smsc95xx_info = {
1185 .description = "smsc95xx USB 2.0 Ethernet",
1186 .bind = smsc95xx_bind,
1187 .unbind = smsc95xx_unbind,
1188 .link_reset = smsc95xx_link_reset,
1189 .reset = smsc95xx_reset,
1190 .rx_fixup = smsc95xx_rx_fixup,
1191 .tx_fixup = smsc95xx_tx_fixup,
1192 .status = smsc95xx_status,
1193 .flags = FLAG_ETHER | FLAG_SEND_ZLP,
1194};
1195
1196static const struct usb_device_id products[] = {
1197 {
1198 /* SMSC9500 USB Ethernet Device */
1199 USB_DEVICE(0x0424, 0x9500),
1200 .driver_info = (unsigned long) &smsc95xx_info,
1201 },
1202 {
1203 /* SMSC9505 USB Ethernet Device */
1204 USB_DEVICE(0x0424, 0x9505),
1205 .driver_info = (unsigned long) &smsc95xx_info,
1206 },
1207 {
1208 /* SMSC9500A USB Ethernet Device */
1209 USB_DEVICE(0x0424, 0x9E00),
1210 .driver_info = (unsigned long) &smsc95xx_info,
1211 },
1212 {
1213 /* SMSC9505A USB Ethernet Device */
1214 USB_DEVICE(0x0424, 0x9E01),
1215 .driver_info = (unsigned long) &smsc95xx_info,
1216 },
1217 {
1218 /* SMSC9512/9514 USB Hub & Ethernet Device */
1219 USB_DEVICE(0x0424, 0xec00),
1220 .driver_info = (unsigned long) &smsc95xx_info,
1221 },
1222 {
1223 /* SMSC9500 USB Ethernet Device (SAL10) */
1224 USB_DEVICE(0x0424, 0x9900),
1225 .driver_info = (unsigned long) &smsc95xx_info,
1226 },
1227 {
1228 /* SMSC9505 USB Ethernet Device (SAL10) */
1229 USB_DEVICE(0x0424, 0x9901),
1230 .driver_info = (unsigned long) &smsc95xx_info,
1231 },
1232 {
1233 /* SMSC9500A USB Ethernet Device (SAL10) */
1234 USB_DEVICE(0x0424, 0x9902),
1235 .driver_info = (unsigned long) &smsc95xx_info,
1236 },
1237 {
1238 /* SMSC9505A USB Ethernet Device (SAL10) */
1239 USB_DEVICE(0x0424, 0x9903),
1240 .driver_info = (unsigned long) &smsc95xx_info,
1241 },
1242 {
1243 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1244 USB_DEVICE(0x0424, 0x9904),
1245 .driver_info = (unsigned long) &smsc95xx_info,
1246 },
1247 {
1248 /* SMSC9500A USB Ethernet Device (HAL) */
1249 USB_DEVICE(0x0424, 0x9905),
1250 .driver_info = (unsigned long) &smsc95xx_info,
1251 },
1252 {
1253 /* SMSC9505A USB Ethernet Device (HAL) */
1254 USB_DEVICE(0x0424, 0x9906),
1255 .driver_info = (unsigned long) &smsc95xx_info,
1256 },
1257 {
1258 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1259 USB_DEVICE(0x0424, 0x9907),
1260 .driver_info = (unsigned long) &smsc95xx_info,
1261 },
1262 {
1263 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1264 USB_DEVICE(0x0424, 0x9908),
1265 .driver_info = (unsigned long) &smsc95xx_info,
1266 },
1267 {
1268 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1269 USB_DEVICE(0x0424, 0x9909),
1270 .driver_info = (unsigned long) &smsc95xx_info,
1271 },
1272 {
1273 /* SMSC LAN9530 USB Ethernet Device */
1274 USB_DEVICE(0x0424, 0x9530),
1275 .driver_info = (unsigned long) &smsc95xx_info,
1276 },
1277 {
1278 /* SMSC LAN9730 USB Ethernet Device */
1279 USB_DEVICE(0x0424, 0x9730),
1280 .driver_info = (unsigned long) &smsc95xx_info,
1281 },
1282 {
1283 /* SMSC LAN89530 USB Ethernet Device */
1284 USB_DEVICE(0x0424, 0x9E08),
1285 .driver_info = (unsigned long) &smsc95xx_info,
1286 },
1287 { }, /* END */
1288};
1289MODULE_DEVICE_TABLE(usb, products);
1290
1291static struct usb_driver smsc95xx_driver = {
1292 .name = "smsc95xx",
1293 .id_table = products,
1294 .probe = usbnet_probe,
1295 .suspend = usbnet_suspend,
1296 .resume = usbnet_resume,
1297 .disconnect = usbnet_disconnect,
1298};
1299
1300static int __init smsc95xx_init(void)
1301{
1302 return usb_register(&smsc95xx_driver);
1303}
1304module_init(smsc95xx_init);
1305
1306static void __exit smsc95xx_exit(void)
1307{
1308 usb_deregister(&smsc95xx_driver);
1309}
1310module_exit(smsc95xx_exit);
1311
1312MODULE_AUTHOR("Nancy Lin");
1313MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1314MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1315MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2 /***************************************************************************
3 *
4 * Copyright (C) 2007-2008 SMSC
5 *
6 *****************************************************************************/
7
8#include <linux/module.h>
9#include <linux/kmod.h>
10#include <linux/netdevice.h>
11#include <linux/etherdevice.h>
12#include <linux/ethtool.h>
13#include <linux/mii.h>
14#include <linux/usb.h>
15#include <linux/bitrev.h>
16#include <linux/crc16.h>
17#include <linux/crc32.h>
18#include <linux/usb/usbnet.h>
19#include <linux/slab.h>
20#include <linux/of_net.h>
21#include "smsc95xx.h"
22
23#define SMSC_CHIPNAME "smsc95xx"
24#define SMSC_DRIVER_VERSION "1.0.6"
25#define HS_USB_PKT_SIZE (512)
26#define FS_USB_PKT_SIZE (64)
27#define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
28#define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
29#define DEFAULT_BULK_IN_DELAY (0x00002000)
30#define MAX_SINGLE_PACKET_SIZE (2048)
31#define LAN95XX_EEPROM_MAGIC (0x9500)
32#define EEPROM_MAC_OFFSET (0x01)
33#define DEFAULT_TX_CSUM_ENABLE (true)
34#define DEFAULT_RX_CSUM_ENABLE (true)
35#define SMSC95XX_INTERNAL_PHY_ID (1)
36#define SMSC95XX_TX_OVERHEAD (8)
37#define SMSC95XX_TX_OVERHEAD_CSUM (12)
38#define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
39 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
40
41#define FEATURE_8_WAKEUP_FILTERS (0x01)
42#define FEATURE_PHY_NLP_CROSSOVER (0x02)
43#define FEATURE_REMOTE_WAKEUP (0x04)
44
45#define SUSPEND_SUSPEND0 (0x01)
46#define SUSPEND_SUSPEND1 (0x02)
47#define SUSPEND_SUSPEND2 (0x04)
48#define SUSPEND_SUSPEND3 (0x08)
49#define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
50 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
51
52#define CARRIER_CHECK_DELAY (2 * HZ)
53
54struct smsc95xx_priv {
55 u32 chip_id;
56 u32 mac_cr;
57 u32 hash_hi;
58 u32 hash_lo;
59 u32 wolopts;
60 spinlock_t mac_cr_lock;
61 u8 features;
62 u8 suspend_flags;
63 u8 mdix_ctrl;
64 bool link_ok;
65 struct delayed_work carrier_check;
66 struct usbnet *dev;
67};
68
69static bool turbo_mode = true;
70module_param(turbo_mode, bool, 0644);
71MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
72
73static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
74 u32 *data, int in_pm)
75{
76 u32 buf;
77 int ret;
78 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
79
80 BUG_ON(!dev);
81
82 if (!in_pm)
83 fn = usbnet_read_cmd;
84 else
85 fn = usbnet_read_cmd_nopm;
86
87 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
88 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
89 0, index, &buf, 4);
90 if (unlikely(ret < 0)) {
91 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
92 index, ret);
93 return ret;
94 }
95
96 le32_to_cpus(&buf);
97 *data = buf;
98
99 return ret;
100}
101
102static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
103 u32 data, int in_pm)
104{
105 u32 buf;
106 int ret;
107 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
108
109 BUG_ON(!dev);
110
111 if (!in_pm)
112 fn = usbnet_write_cmd;
113 else
114 fn = usbnet_write_cmd_nopm;
115
116 buf = data;
117 cpu_to_le32s(&buf);
118
119 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
120 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
121 0, index, &buf, 4);
122 if (unlikely(ret < 0))
123 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
124 index, ret);
125
126 return ret;
127}
128
129static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
130 u32 *data)
131{
132 return __smsc95xx_read_reg(dev, index, data, 1);
133}
134
135static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
136 u32 data)
137{
138 return __smsc95xx_write_reg(dev, index, data, 1);
139}
140
141static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
142 u32 *data)
143{
144 return __smsc95xx_read_reg(dev, index, data, 0);
145}
146
147static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
148 u32 data)
149{
150 return __smsc95xx_write_reg(dev, index, data, 0);
151}
152
153/* Loop until the read is completed with timeout
154 * called with phy_mutex held */
155static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
156 int in_pm)
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, in_pm);
164 if (ret < 0) {
165 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
166 return ret;
167 }
168
169 if (!(val & MII_BUSY_))
170 return 0;
171 } while (!time_after(jiffies, start_time + HZ));
172
173 return -EIO;
174}
175
176static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
177 int in_pm)
178{
179 struct usbnet *dev = netdev_priv(netdev);
180 u32 val, addr;
181 int ret;
182
183 mutex_lock(&dev->phy_mutex);
184
185 /* confirm MII not busy */
186 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
187 if (ret < 0) {
188 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
189 goto done;
190 }
191
192 /* set the address, index & direction (read from PHY) */
193 phy_id &= dev->mii.phy_id_mask;
194 idx &= dev->mii.reg_num_mask;
195 addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
196 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
197 if (ret < 0) {
198 netdev_warn(dev->net, "Error writing MII_ADDR\n");
199 goto done;
200 }
201
202 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
203 if (ret < 0) {
204 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
205 goto done;
206 }
207
208 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
209 if (ret < 0) {
210 netdev_warn(dev->net, "Error reading MII_DATA\n");
211 goto done;
212 }
213
214 ret = (u16)(val & 0xFFFF);
215
216done:
217 mutex_unlock(&dev->phy_mutex);
218 return ret;
219}
220
221static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
222 int idx, int regval, int in_pm)
223{
224 struct usbnet *dev = netdev_priv(netdev);
225 u32 val, addr;
226 int ret;
227
228 mutex_lock(&dev->phy_mutex);
229
230 /* confirm MII not busy */
231 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
232 if (ret < 0) {
233 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
234 goto done;
235 }
236
237 val = regval;
238 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
239 if (ret < 0) {
240 netdev_warn(dev->net, "Error writing MII_DATA\n");
241 goto done;
242 }
243
244 /* set the address, index & direction (write to PHY) */
245 phy_id &= dev->mii.phy_id_mask;
246 idx &= dev->mii.reg_num_mask;
247 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
248 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
249 if (ret < 0) {
250 netdev_warn(dev->net, "Error writing MII_ADDR\n");
251 goto done;
252 }
253
254 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
255 if (ret < 0) {
256 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
257 goto done;
258 }
259
260done:
261 mutex_unlock(&dev->phy_mutex);
262}
263
264static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
265 int idx)
266{
267 return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
268}
269
270static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
271 int idx, int regval)
272{
273 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
274}
275
276static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
277{
278 return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
279}
280
281static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
282 int regval)
283{
284 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
285}
286
287static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
288{
289 unsigned long start_time = jiffies;
290 u32 val;
291 int ret;
292
293 do {
294 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
295 if (ret < 0) {
296 netdev_warn(dev->net, "Error reading E2P_CMD\n");
297 return ret;
298 }
299
300 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
301 break;
302 udelay(40);
303 } while (!time_after(jiffies, start_time + HZ));
304
305 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
306 netdev_warn(dev->net, "EEPROM read operation timeout\n");
307 return -EIO;
308 }
309
310 return 0;
311}
312
313static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
314{
315 unsigned long start_time = jiffies;
316 u32 val;
317 int ret;
318
319 do {
320 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
321 if (ret < 0) {
322 netdev_warn(dev->net, "Error reading E2P_CMD\n");
323 return ret;
324 }
325
326 if (!(val & E2P_CMD_BUSY_))
327 return 0;
328
329 udelay(40);
330 } while (!time_after(jiffies, start_time + HZ));
331
332 netdev_warn(dev->net, "EEPROM is busy\n");
333 return -EIO;
334}
335
336static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
337 u8 *data)
338{
339 u32 val;
340 int i, ret;
341
342 BUG_ON(!dev);
343 BUG_ON(!data);
344
345 ret = smsc95xx_eeprom_confirm_not_busy(dev);
346 if (ret)
347 return ret;
348
349 for (i = 0; i < length; i++) {
350 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
351 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
352 if (ret < 0) {
353 netdev_warn(dev->net, "Error writing E2P_CMD\n");
354 return ret;
355 }
356
357 ret = smsc95xx_wait_eeprom(dev);
358 if (ret < 0)
359 return ret;
360
361 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
362 if (ret < 0) {
363 netdev_warn(dev->net, "Error reading E2P_DATA\n");
364 return ret;
365 }
366
367 data[i] = val & 0xFF;
368 offset++;
369 }
370
371 return 0;
372}
373
374static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
375 u8 *data)
376{
377 u32 val;
378 int i, ret;
379
380 BUG_ON(!dev);
381 BUG_ON(!data);
382
383 ret = smsc95xx_eeprom_confirm_not_busy(dev);
384 if (ret)
385 return ret;
386
387 /* Issue write/erase enable command */
388 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
389 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
390 if (ret < 0) {
391 netdev_warn(dev->net, "Error writing E2P_DATA\n");
392 return ret;
393 }
394
395 ret = smsc95xx_wait_eeprom(dev);
396 if (ret < 0)
397 return ret;
398
399 for (i = 0; i < length; i++) {
400
401 /* Fill data register */
402 val = data[i];
403 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
404 if (ret < 0) {
405 netdev_warn(dev->net, "Error writing E2P_DATA\n");
406 return ret;
407 }
408
409 /* Send "write" command */
410 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
411 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
412 if (ret < 0) {
413 netdev_warn(dev->net, "Error writing E2P_CMD\n");
414 return ret;
415 }
416
417 ret = smsc95xx_wait_eeprom(dev);
418 if (ret < 0)
419 return ret;
420
421 offset++;
422 }
423
424 return 0;
425}
426
427static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
428 u32 data)
429{
430 const u16 size = 4;
431 u32 buf;
432 int ret;
433
434 buf = data;
435 cpu_to_le32s(&buf);
436
437 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
438 USB_DIR_OUT | USB_TYPE_VENDOR |
439 USB_RECIP_DEVICE,
440 0, index, &buf, size);
441 if (ret < 0)
442 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
443 ret);
444 return ret;
445}
446
447/* returns hash bit number for given MAC address
448 * example:
449 * 01 00 5E 00 00 01 -> returns bit number 31 */
450static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
451{
452 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
453}
454
455static void smsc95xx_set_multicast(struct net_device *netdev)
456{
457 struct usbnet *dev = netdev_priv(netdev);
458 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
459 unsigned long flags;
460 int ret;
461
462 pdata->hash_hi = 0;
463 pdata->hash_lo = 0;
464
465 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
466
467 if (dev->net->flags & IFF_PROMISC) {
468 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
469 pdata->mac_cr |= MAC_CR_PRMS_;
470 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
471 } else if (dev->net->flags & IFF_ALLMULTI) {
472 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
473 pdata->mac_cr |= MAC_CR_MCPAS_;
474 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
475 } else if (!netdev_mc_empty(dev->net)) {
476 struct netdev_hw_addr *ha;
477
478 pdata->mac_cr |= MAC_CR_HPFILT_;
479 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
480
481 netdev_for_each_mc_addr(ha, netdev) {
482 u32 bitnum = smsc95xx_hash(ha->addr);
483 u32 mask = 0x01 << (bitnum & 0x1F);
484 if (bitnum & 0x20)
485 pdata->hash_hi |= mask;
486 else
487 pdata->hash_lo |= mask;
488 }
489
490 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
491 pdata->hash_hi, pdata->hash_lo);
492 } else {
493 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
494 pdata->mac_cr &=
495 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
496 }
497
498 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
499
500 /* Initiate async writes, as we can't wait for completion here */
501 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
502 if (ret < 0)
503 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
504
505 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
506 if (ret < 0)
507 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
508
509 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
510 if (ret < 0)
511 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
512}
513
514static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
515 u16 lcladv, u16 rmtadv)
516{
517 u32 flow = 0, afc_cfg;
518
519 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
520 if (ret < 0)
521 return ret;
522
523 if (duplex == DUPLEX_FULL) {
524 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
525
526 if (cap & FLOW_CTRL_RX)
527 flow = 0xFFFF0002;
528
529 if (cap & FLOW_CTRL_TX) {
530 afc_cfg |= 0xF;
531 flow |= 0xFFFF0000;
532 } else {
533 afc_cfg &= ~0xF;
534 }
535
536 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
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\n");
541 afc_cfg |= 0xF;
542 }
543
544 ret = smsc95xx_write_reg(dev, FLOW, flow);
545 if (ret < 0)
546 return ret;
547
548 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
549}
550
551static int smsc95xx_link_reset(struct usbnet *dev)
552{
553 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
554 struct mii_if_info *mii = &dev->mii;
555 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
556 unsigned long flags;
557 u16 lcladv, rmtadv;
558 int ret;
559
560 /* clear interrupt status */
561 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
562 if (ret < 0)
563 return ret;
564
565 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
566 if (ret < 0)
567 return ret;
568
569 mii_check_media(mii, 1, 1);
570 mii_ethtool_gset(&dev->mii, &ecmd);
571 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
572 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
573
574 netif_dbg(dev, link, dev->net,
575 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
576 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
577
578 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
579 if (ecmd.duplex != DUPLEX_FULL) {
580 pdata->mac_cr &= ~MAC_CR_FDPX_;
581 pdata->mac_cr |= MAC_CR_RCVOWN_;
582 } else {
583 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
584 pdata->mac_cr |= MAC_CR_FDPX_;
585 }
586 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
587
588 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
589 if (ret < 0)
590 return ret;
591
592 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
593 if (ret < 0)
594 netdev_warn(dev->net, "Error updating PHY flow control\n");
595
596 return ret;
597}
598
599static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
600{
601 u32 intdata;
602
603 if (urb->actual_length != 4) {
604 netdev_warn(dev->net, "unexpected urb length %d\n",
605 urb->actual_length);
606 return;
607 }
608
609 intdata = get_unaligned_le32(urb->transfer_buffer);
610 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
611
612 if (intdata & INT_ENP_PHY_INT_)
613 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
614 else
615 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
616 intdata);
617}
618
619static void set_carrier(struct usbnet *dev, bool link)
620{
621 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
622
623 if (pdata->link_ok == link)
624 return;
625
626 pdata->link_ok = link;
627
628 if (link)
629 usbnet_link_change(dev, 1, 0);
630 else
631 usbnet_link_change(dev, 0, 0);
632}
633
634static void check_carrier(struct work_struct *work)
635{
636 struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
637 carrier_check.work);
638 struct usbnet *dev = pdata->dev;
639 int ret;
640
641 if (pdata->suspend_flags != 0)
642 return;
643
644 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
645 if (ret < 0) {
646 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
647 return;
648 }
649 if (ret & BMSR_LSTATUS)
650 set_carrier(dev, 1);
651 else
652 set_carrier(dev, 0);
653
654 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
655}
656
657/* Enable or disable Tx & Rx checksum offload engines */
658static int smsc95xx_set_features(struct net_device *netdev,
659 netdev_features_t features)
660{
661 struct usbnet *dev = netdev_priv(netdev);
662 u32 read_buf;
663 int ret;
664
665 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
666 if (ret < 0)
667 return ret;
668
669 if (features & NETIF_F_IP_CSUM)
670 read_buf |= Tx_COE_EN_;
671 else
672 read_buf &= ~Tx_COE_EN_;
673
674 if (features & NETIF_F_RXCSUM)
675 read_buf |= Rx_COE_EN_;
676 else
677 read_buf &= ~Rx_COE_EN_;
678
679 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
680 if (ret < 0)
681 return ret;
682
683 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
684 return 0;
685}
686
687static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
688{
689 return MAX_EEPROM_SIZE;
690}
691
692static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
693 struct ethtool_eeprom *ee, u8 *data)
694{
695 struct usbnet *dev = netdev_priv(netdev);
696
697 ee->magic = LAN95XX_EEPROM_MAGIC;
698
699 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
700}
701
702static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
703 struct ethtool_eeprom *ee, u8 *data)
704{
705 struct usbnet *dev = netdev_priv(netdev);
706
707 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
708 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
709 ee->magic);
710 return -EINVAL;
711 }
712
713 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
714}
715
716static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
717{
718 /* all smsc95xx registers */
719 return COE_CR - ID_REV + sizeof(u32);
720}
721
722static void
723smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
724 void *buf)
725{
726 struct usbnet *dev = netdev_priv(netdev);
727 unsigned int i, j;
728 int retval;
729 u32 *data = buf;
730
731 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version);
732 if (retval < 0) {
733 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
734 return;
735 }
736
737 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
738 retval = smsc95xx_read_reg(dev, i, &data[j]);
739 if (retval < 0) {
740 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
741 return;
742 }
743 }
744}
745
746static void smsc95xx_ethtool_get_wol(struct net_device *net,
747 struct ethtool_wolinfo *wolinfo)
748{
749 struct usbnet *dev = netdev_priv(net);
750 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
751
752 wolinfo->supported = SUPPORTED_WAKE;
753 wolinfo->wolopts = pdata->wolopts;
754}
755
756static int smsc95xx_ethtool_set_wol(struct net_device *net,
757 struct ethtool_wolinfo *wolinfo)
758{
759 struct usbnet *dev = netdev_priv(net);
760 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
761 int ret;
762
763 if (wolinfo->wolopts & ~SUPPORTED_WAKE)
764 return -EINVAL;
765
766 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
767
768 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
769 if (ret < 0)
770 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
771
772 return ret;
773}
774
775static int get_mdix_status(struct net_device *net)
776{
777 struct usbnet *dev = netdev_priv(net);
778 u32 val;
779 int buf;
780
781 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
782 if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
783 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
784 return ETH_TP_MDI_AUTO;
785 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
786 return ETH_TP_MDI_X;
787 } else {
788 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
789 if (val & STRAP_STATUS_AMDIX_EN_)
790 return ETH_TP_MDI_AUTO;
791 }
792
793 return ETH_TP_MDI;
794}
795
796static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
797{
798 struct usbnet *dev = netdev_priv(net);
799 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
800 int buf;
801
802 if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
803 (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
804 (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
805 (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
806 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
807 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
808 PHY_EDPD_CONFIG);
809 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
810 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
811 PHY_EDPD_CONFIG, buf);
812 }
813
814 if (mdix_ctrl == ETH_TP_MDI) {
815 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
816 SPECIAL_CTRL_STS);
817 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
818 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
819 SPECIAL_CTRL_STS_AMDIX_STATE_);
820 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
821 SPECIAL_CTRL_STS, buf);
822 } else if (mdix_ctrl == ETH_TP_MDI_X) {
823 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
824 SPECIAL_CTRL_STS);
825 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
826 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
827 SPECIAL_CTRL_STS_AMDIX_STATE_);
828 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
829 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
830 SPECIAL_CTRL_STS, buf);
831 } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
832 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
833 SPECIAL_CTRL_STS);
834 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
835 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
836 SPECIAL_CTRL_STS_AMDIX_STATE_);
837 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
838 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
839 SPECIAL_CTRL_STS, buf);
840 }
841 pdata->mdix_ctrl = mdix_ctrl;
842}
843
844static int smsc95xx_get_link_ksettings(struct net_device *net,
845 struct ethtool_link_ksettings *cmd)
846{
847 struct usbnet *dev = netdev_priv(net);
848 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
849 int retval;
850
851 retval = usbnet_get_link_ksettings(net, cmd);
852
853 cmd->base.eth_tp_mdix = pdata->mdix_ctrl;
854 cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl;
855
856 return retval;
857}
858
859static int smsc95xx_set_link_ksettings(struct net_device *net,
860 const struct ethtool_link_ksettings *cmd)
861{
862 struct usbnet *dev = netdev_priv(net);
863 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
864 int retval;
865
866 if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl)
867 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl);
868
869 retval = usbnet_set_link_ksettings(net, cmd);
870
871 return retval;
872}
873
874static const struct ethtool_ops smsc95xx_ethtool_ops = {
875 .get_link = usbnet_get_link,
876 .nway_reset = usbnet_nway_reset,
877 .get_drvinfo = usbnet_get_drvinfo,
878 .get_msglevel = usbnet_get_msglevel,
879 .set_msglevel = usbnet_set_msglevel,
880 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
881 .get_eeprom = smsc95xx_ethtool_get_eeprom,
882 .set_eeprom = smsc95xx_ethtool_set_eeprom,
883 .get_regs_len = smsc95xx_ethtool_getregslen,
884 .get_regs = smsc95xx_ethtool_getregs,
885 .get_wol = smsc95xx_ethtool_get_wol,
886 .set_wol = smsc95xx_ethtool_set_wol,
887 .get_link_ksettings = smsc95xx_get_link_ksettings,
888 .set_link_ksettings = smsc95xx_set_link_ksettings,
889 .get_ts_info = ethtool_op_get_ts_info,
890};
891
892static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
893{
894 struct usbnet *dev = netdev_priv(netdev);
895
896 if (!netif_running(netdev))
897 return -EINVAL;
898
899 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
900}
901
902static void smsc95xx_init_mac_address(struct usbnet *dev)
903{
904 const u8 *mac_addr;
905
906 /* maybe the boot loader passed the MAC address in devicetree */
907 mac_addr = of_get_mac_address(dev->udev->dev.of_node);
908 if (!IS_ERR(mac_addr)) {
909 ether_addr_copy(dev->net->dev_addr, mac_addr);
910 return;
911 }
912
913 /* try reading mac address from EEPROM */
914 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
915 dev->net->dev_addr) == 0) {
916 if (is_valid_ether_addr(dev->net->dev_addr)) {
917 /* eeprom values are valid so use them */
918 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
919 return;
920 }
921 }
922
923 /* no useful static MAC address found. generate a random one */
924 eth_hw_addr_random(dev->net);
925 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
926}
927
928static int smsc95xx_set_mac_address(struct usbnet *dev)
929{
930 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
931 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
932 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
933 int ret;
934
935 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
936 if (ret < 0)
937 return ret;
938
939 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
940}
941
942/* starts the TX path */
943static int smsc95xx_start_tx_path(struct usbnet *dev)
944{
945 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
946 unsigned long flags;
947 int ret;
948
949 /* Enable Tx at MAC */
950 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
951 pdata->mac_cr |= MAC_CR_TXEN_;
952 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
953
954 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
955 if (ret < 0)
956 return ret;
957
958 /* Enable Tx at SCSRs */
959 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
960}
961
962/* Starts the Receive path */
963static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
964{
965 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
966 unsigned long flags;
967
968 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
969 pdata->mac_cr |= MAC_CR_RXEN_;
970 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
971
972 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
973}
974
975static int smsc95xx_phy_initialize(struct usbnet *dev)
976{
977 int bmcr, ret, timeout = 0;
978
979 /* Initialize MII structure */
980 dev->mii.dev = dev->net;
981 dev->mii.mdio_read = smsc95xx_mdio_read;
982 dev->mii.mdio_write = smsc95xx_mdio_write;
983 dev->mii.phy_id_mask = 0x1f;
984 dev->mii.reg_num_mask = 0x1f;
985 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
986
987 /* reset phy and wait for reset to complete */
988 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
989
990 do {
991 msleep(10);
992 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
993 timeout++;
994 } while ((bmcr & BMCR_RESET) && (timeout < 100));
995
996 if (timeout >= 100) {
997 netdev_warn(dev->net, "timeout on PHY Reset");
998 return -EIO;
999 }
1000
1001 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1002 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1003 ADVERTISE_PAUSE_ASYM);
1004
1005 /* read to clear */
1006 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1007 if (ret < 0) {
1008 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1009 return ret;
1010 }
1011
1012 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1013 PHY_INT_MASK_DEFAULT_);
1014 mii_nway_restart(&dev->mii);
1015
1016 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1017 return 0;
1018}
1019
1020static int smsc95xx_reset(struct usbnet *dev)
1021{
1022 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1023 u32 read_buf, write_buf, burst_cap;
1024 int ret = 0, timeout;
1025
1026 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1027
1028 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1029 if (ret < 0)
1030 return ret;
1031
1032 timeout = 0;
1033 do {
1034 msleep(10);
1035 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1036 if (ret < 0)
1037 return ret;
1038 timeout++;
1039 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1040
1041 if (timeout >= 100) {
1042 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1043 return ret;
1044 }
1045
1046 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1047 if (ret < 0)
1048 return ret;
1049
1050 timeout = 0;
1051 do {
1052 msleep(10);
1053 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1054 if (ret < 0)
1055 return ret;
1056 timeout++;
1057 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1058
1059 if (timeout >= 100) {
1060 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1061 return ret;
1062 }
1063
1064 ret = smsc95xx_set_mac_address(dev);
1065 if (ret < 0)
1066 return ret;
1067
1068 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1069 dev->net->dev_addr);
1070
1071 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1072 if (ret < 0)
1073 return ret;
1074
1075 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1076 read_buf);
1077
1078 read_buf |= HW_CFG_BIR_;
1079
1080 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1081 if (ret < 0)
1082 return ret;
1083
1084 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1085 if (ret < 0)
1086 return ret;
1087
1088 netif_dbg(dev, ifup, dev->net,
1089 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1090 read_buf);
1091
1092 if (!turbo_mode) {
1093 burst_cap = 0;
1094 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1095 } else if (dev->udev->speed == USB_SPEED_HIGH) {
1096 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1097 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1098 } else {
1099 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1100 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1101 }
1102
1103 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1104 (ulong)dev->rx_urb_size);
1105
1106 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1107 if (ret < 0)
1108 return ret;
1109
1110 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1111 if (ret < 0)
1112 return ret;
1113
1114 netif_dbg(dev, ifup, dev->net,
1115 "Read Value from BURST_CAP after writing: 0x%08x\n",
1116 read_buf);
1117
1118 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1119 if (ret < 0)
1120 return ret;
1121
1122 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1123 if (ret < 0)
1124 return ret;
1125
1126 netif_dbg(dev, ifup, dev->net,
1127 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1128 read_buf);
1129
1130 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1131 if (ret < 0)
1132 return ret;
1133
1134 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1135 read_buf);
1136
1137 if (turbo_mode)
1138 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1139
1140 read_buf &= ~HW_CFG_RXDOFF_;
1141
1142 /* set Rx data offset=2, Make IP header aligns on word boundary. */
1143 read_buf |= NET_IP_ALIGN << 9;
1144
1145 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1146 if (ret < 0)
1147 return ret;
1148
1149 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1150 if (ret < 0)
1151 return ret;
1152
1153 netif_dbg(dev, ifup, dev->net,
1154 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1155
1156 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1157 if (ret < 0)
1158 return ret;
1159
1160 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1161 if (ret < 0)
1162 return ret;
1163 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1164
1165 /* Configure GPIO pins as LED outputs */
1166 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1167 LED_GPIO_CFG_FDX_LED;
1168 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1169 if (ret < 0)
1170 return ret;
1171
1172 /* Init Tx */
1173 ret = smsc95xx_write_reg(dev, FLOW, 0);
1174 if (ret < 0)
1175 return ret;
1176
1177 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1178 if (ret < 0)
1179 return ret;
1180
1181 /* Don't need mac_cr_lock during initialisation */
1182 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1183 if (ret < 0)
1184 return ret;
1185
1186 /* Init Rx */
1187 /* Set Vlan */
1188 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1189 if (ret < 0)
1190 return ret;
1191
1192 /* Enable or disable checksum offload engines */
1193 ret = smsc95xx_set_features(dev->net, dev->net->features);
1194 if (ret < 0) {
1195 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1196 return ret;
1197 }
1198
1199 smsc95xx_set_multicast(dev->net);
1200
1201 ret = smsc95xx_phy_initialize(dev);
1202 if (ret < 0) {
1203 netdev_warn(dev->net, "Failed to init PHY\n");
1204 return ret;
1205 }
1206
1207 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1208 if (ret < 0)
1209 return ret;
1210
1211 /* enable PHY interrupts */
1212 read_buf |= INT_EP_CTL_PHY_INT_;
1213
1214 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1215 if (ret < 0)
1216 return ret;
1217
1218 ret = smsc95xx_start_tx_path(dev);
1219 if (ret < 0) {
1220 netdev_warn(dev->net, "Failed to start TX path\n");
1221 return ret;
1222 }
1223
1224 ret = smsc95xx_start_rx_path(dev, 0);
1225 if (ret < 0) {
1226 netdev_warn(dev->net, "Failed to start RX path\n");
1227 return ret;
1228 }
1229
1230 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1231 return 0;
1232}
1233
1234static const struct net_device_ops smsc95xx_netdev_ops = {
1235 .ndo_open = usbnet_open,
1236 .ndo_stop = usbnet_stop,
1237 .ndo_start_xmit = usbnet_start_xmit,
1238 .ndo_tx_timeout = usbnet_tx_timeout,
1239 .ndo_change_mtu = usbnet_change_mtu,
1240 .ndo_get_stats64 = usbnet_get_stats64,
1241 .ndo_set_mac_address = eth_mac_addr,
1242 .ndo_validate_addr = eth_validate_addr,
1243 .ndo_do_ioctl = smsc95xx_ioctl,
1244 .ndo_set_rx_mode = smsc95xx_set_multicast,
1245 .ndo_set_features = smsc95xx_set_features,
1246};
1247
1248static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1249{
1250 struct smsc95xx_priv *pdata = NULL;
1251 u32 val;
1252 int ret;
1253
1254 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1255
1256 ret = usbnet_get_endpoints(dev, intf);
1257 if (ret < 0) {
1258 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1259 return ret;
1260 }
1261
1262 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1263 GFP_KERNEL);
1264
1265 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1266 if (!pdata)
1267 return -ENOMEM;
1268
1269 spin_lock_init(&pdata->mac_cr_lock);
1270
1271 /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1272 * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1273 * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1274 * it is transmitted as all ones. The zero transmitted checksum means
1275 * transmitter generated no checksum. Hence, enable csum offload only
1276 * for ipv4 packets.
1277 */
1278 if (DEFAULT_TX_CSUM_ENABLE)
1279 dev->net->features |= NETIF_F_IP_CSUM;
1280 if (DEFAULT_RX_CSUM_ENABLE)
1281 dev->net->features |= NETIF_F_RXCSUM;
1282
1283 dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1284 set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
1285
1286 smsc95xx_init_mac_address(dev);
1287
1288 /* Init all registers */
1289 ret = smsc95xx_reset(dev);
1290 if (ret)
1291 goto free_pdata;
1292
1293 /* detect device revision as different features may be available */
1294 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1295 if (ret < 0)
1296 goto free_pdata;
1297
1298 val >>= 16;
1299 pdata->chip_id = val;
1300 pdata->mdix_ctrl = get_mdix_status(dev->net);
1301
1302 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1303 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1304 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1305 FEATURE_PHY_NLP_CROSSOVER |
1306 FEATURE_REMOTE_WAKEUP);
1307 else if (val == ID_REV_CHIP_ID_9512_)
1308 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1309
1310 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1311 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1312 dev->net->flags |= IFF_MULTICAST;
1313 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1314 dev->net->min_mtu = ETH_MIN_MTU;
1315 dev->net->max_mtu = ETH_DATA_LEN;
1316 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1317
1318 pdata->dev = dev;
1319 INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1320 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1321
1322 return 0;
1323
1324free_pdata:
1325 kfree(pdata);
1326 return ret;
1327}
1328
1329static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1330{
1331 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1332
1333 if (pdata) {
1334 cancel_delayed_work_sync(&pdata->carrier_check);
1335 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1336 kfree(pdata);
1337 pdata = NULL;
1338 dev->data[0] = 0;
1339 }
1340}
1341
1342static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1343{
1344 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1345 return crc << ((filter % 2) * 16);
1346}
1347
1348static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1349{
1350 struct mii_if_info *mii = &dev->mii;
1351 int ret;
1352
1353 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1354
1355 /* read to clear */
1356 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1357 if (ret < 0)
1358 return ret;
1359
1360 /* enable interrupt source */
1361 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1362 if (ret < 0)
1363 return ret;
1364
1365 ret |= mask;
1366
1367 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1368
1369 return 0;
1370}
1371
1372static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1373{
1374 struct mii_if_info *mii = &dev->mii;
1375 int ret;
1376
1377 /* first, a dummy read, needed to latch some MII phys */
1378 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1379 if (ret < 0)
1380 return ret;
1381
1382 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1383 if (ret < 0)
1384 return ret;
1385
1386 return !!(ret & BMSR_LSTATUS);
1387}
1388
1389static int smsc95xx_enter_suspend0(struct usbnet *dev)
1390{
1391 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1392 u32 val;
1393 int ret;
1394
1395 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1396 if (ret < 0)
1397 return ret;
1398
1399 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1400 val |= PM_CTL_SUS_MODE_0;
1401
1402 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1403 if (ret < 0)
1404 return ret;
1405
1406 /* clear wol status */
1407 val &= ~PM_CTL_WUPS_;
1408 val |= PM_CTL_WUPS_WOL_;
1409
1410 /* enable energy detection */
1411 if (pdata->wolopts & WAKE_PHY)
1412 val |= PM_CTL_WUPS_ED_;
1413
1414 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1415 if (ret < 0)
1416 return ret;
1417
1418 /* read back PM_CTRL */
1419 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1420 if (ret < 0)
1421 return ret;
1422
1423 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1424
1425 return 0;
1426}
1427
1428static int smsc95xx_enter_suspend1(struct usbnet *dev)
1429{
1430 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1431 struct mii_if_info *mii = &dev->mii;
1432 u32 val;
1433 int ret;
1434
1435 /* reconfigure link pulse detection timing for
1436 * compatibility with non-standard link partners
1437 */
1438 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1439 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1440 PHY_EDPD_CONFIG_DEFAULT);
1441
1442 /* enable energy detect power-down mode */
1443 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1444 if (ret < 0)
1445 return ret;
1446
1447 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1448
1449 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1450
1451 /* enter SUSPEND1 mode */
1452 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1453 if (ret < 0)
1454 return ret;
1455
1456 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1457 val |= PM_CTL_SUS_MODE_1;
1458
1459 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1460 if (ret < 0)
1461 return ret;
1462
1463 /* clear wol status, enable energy detection */
1464 val &= ~PM_CTL_WUPS_;
1465 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1466
1467 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1468 if (ret < 0)
1469 return ret;
1470
1471 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1472
1473 return 0;
1474}
1475
1476static int smsc95xx_enter_suspend2(struct usbnet *dev)
1477{
1478 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1479 u32 val;
1480 int ret;
1481
1482 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1483 if (ret < 0)
1484 return ret;
1485
1486 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1487 val |= PM_CTL_SUS_MODE_2;
1488
1489 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1490 if (ret < 0)
1491 return ret;
1492
1493 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1494
1495 return 0;
1496}
1497
1498static int smsc95xx_enter_suspend3(struct usbnet *dev)
1499{
1500 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1501 u32 val;
1502 int ret;
1503
1504 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1505 if (ret < 0)
1506 return ret;
1507
1508 if (val & RX_FIFO_INF_USED_) {
1509 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1510 return -EBUSY;
1511 }
1512
1513 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1514 if (ret < 0)
1515 return ret;
1516
1517 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1518 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1519
1520 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1521 if (ret < 0)
1522 return ret;
1523
1524 /* clear wol status */
1525 val &= ~PM_CTL_WUPS_;
1526 val |= PM_CTL_WUPS_WOL_;
1527
1528 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1529 if (ret < 0)
1530 return ret;
1531
1532 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1533
1534 return 0;
1535}
1536
1537static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1538{
1539 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1540 int ret;
1541
1542 if (!netif_running(dev->net)) {
1543 /* interface is ifconfig down so fully power down hw */
1544 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1545 return smsc95xx_enter_suspend2(dev);
1546 }
1547
1548 if (!link_up) {
1549 /* link is down so enter EDPD mode, but only if device can
1550 * reliably resume from it. This check should be redundant
1551 * as current FEATURE_REMOTE_WAKEUP parts also support
1552 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1553 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1554 netdev_warn(dev->net, "EDPD not supported\n");
1555 return -EBUSY;
1556 }
1557
1558 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1559
1560 /* enable PHY wakeup events for if cable is attached */
1561 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1562 PHY_INT_MASK_ANEG_COMP_);
1563 if (ret < 0) {
1564 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1565 return ret;
1566 }
1567
1568 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1569 return smsc95xx_enter_suspend1(dev);
1570 }
1571
1572 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1573 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1574 PHY_INT_MASK_LINK_DOWN_);
1575 if (ret < 0) {
1576 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1577 return ret;
1578 }
1579
1580 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1581 return smsc95xx_enter_suspend3(dev);
1582}
1583
1584static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1585{
1586 struct usbnet *dev = usb_get_intfdata(intf);
1587 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1588 u32 val, link_up;
1589 int ret;
1590
1591 ret = usbnet_suspend(intf, message);
1592 if (ret < 0) {
1593 netdev_warn(dev->net, "usbnet_suspend error\n");
1594 return ret;
1595 }
1596
1597 cancel_delayed_work_sync(&pdata->carrier_check);
1598
1599 if (pdata->suspend_flags) {
1600 netdev_warn(dev->net, "error during last resume\n");
1601 pdata->suspend_flags = 0;
1602 }
1603
1604 /* determine if link is up using only _nopm functions */
1605 link_up = smsc95xx_link_ok_nopm(dev);
1606
1607 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1608 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1609 ret = smsc95xx_autosuspend(dev, link_up);
1610 goto done;
1611 }
1612
1613 /* if we get this far we're not autosuspending */
1614 /* if no wol options set, or if link is down and we're not waking on
1615 * PHY activity, enter lowest power SUSPEND2 mode
1616 */
1617 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1618 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1619 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1620
1621 /* disable energy detect (link up) & wake up events */
1622 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1623 if (ret < 0)
1624 goto done;
1625
1626 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1627
1628 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1629 if (ret < 0)
1630 goto done;
1631
1632 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1633 if (ret < 0)
1634 goto done;
1635
1636 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1637
1638 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1639 if (ret < 0)
1640 goto done;
1641
1642 ret = smsc95xx_enter_suspend2(dev);
1643 goto done;
1644 }
1645
1646 if (pdata->wolopts & WAKE_PHY) {
1647 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1648 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1649 if (ret < 0) {
1650 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1651 goto done;
1652 }
1653
1654 /* if link is down then configure EDPD and enter SUSPEND1,
1655 * otherwise enter SUSPEND0 below
1656 */
1657 if (!link_up) {
1658 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1659 ret = smsc95xx_enter_suspend1(dev);
1660 goto done;
1661 }
1662 }
1663
1664 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1665 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1666 u32 command[2];
1667 u32 offset[2];
1668 u32 crc[4];
1669 int wuff_filter_count =
1670 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1671 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1672 int i, filter = 0;
1673
1674 if (!filter_mask) {
1675 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1676 ret = -ENOMEM;
1677 goto done;
1678 }
1679
1680 memset(command, 0, sizeof(command));
1681 memset(offset, 0, sizeof(offset));
1682 memset(crc, 0, sizeof(crc));
1683
1684 if (pdata->wolopts & WAKE_BCAST) {
1685 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1686 netdev_info(dev->net, "enabling broadcast detection\n");
1687 filter_mask[filter * 4] = 0x003F;
1688 filter_mask[filter * 4 + 1] = 0x00;
1689 filter_mask[filter * 4 + 2] = 0x00;
1690 filter_mask[filter * 4 + 3] = 0x00;
1691 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1692 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1693 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1694 filter++;
1695 }
1696
1697 if (pdata->wolopts & WAKE_MCAST) {
1698 const u8 mcast[] = {0x01, 0x00, 0x5E};
1699 netdev_info(dev->net, "enabling multicast detection\n");
1700 filter_mask[filter * 4] = 0x0007;
1701 filter_mask[filter * 4 + 1] = 0x00;
1702 filter_mask[filter * 4 + 2] = 0x00;
1703 filter_mask[filter * 4 + 3] = 0x00;
1704 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1705 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1706 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1707 filter++;
1708 }
1709
1710 if (pdata->wolopts & WAKE_ARP) {
1711 const u8 arp[] = {0x08, 0x06};
1712 netdev_info(dev->net, "enabling ARP detection\n");
1713 filter_mask[filter * 4] = 0x0003;
1714 filter_mask[filter * 4 + 1] = 0x00;
1715 filter_mask[filter * 4 + 2] = 0x00;
1716 filter_mask[filter * 4 + 3] = 0x00;
1717 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1718 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1719 crc[filter/2] |= smsc_crc(arp, 2, filter);
1720 filter++;
1721 }
1722
1723 if (pdata->wolopts & WAKE_UCAST) {
1724 netdev_info(dev->net, "enabling unicast detection\n");
1725 filter_mask[filter * 4] = 0x003F;
1726 filter_mask[filter * 4 + 1] = 0x00;
1727 filter_mask[filter * 4 + 2] = 0x00;
1728 filter_mask[filter * 4 + 3] = 0x00;
1729 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1730 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1731 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1732 filter++;
1733 }
1734
1735 for (i = 0; i < (wuff_filter_count * 4); i++) {
1736 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1737 if (ret < 0) {
1738 kfree(filter_mask);
1739 goto done;
1740 }
1741 }
1742 kfree(filter_mask);
1743
1744 for (i = 0; i < (wuff_filter_count / 4); i++) {
1745 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1746 if (ret < 0)
1747 goto done;
1748 }
1749
1750 for (i = 0; i < (wuff_filter_count / 4); i++) {
1751 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1752 if (ret < 0)
1753 goto done;
1754 }
1755
1756 for (i = 0; i < (wuff_filter_count / 2); i++) {
1757 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1758 if (ret < 0)
1759 goto done;
1760 }
1761
1762 /* clear any pending pattern match packet status */
1763 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1764 if (ret < 0)
1765 goto done;
1766
1767 val |= WUCSR_WUFR_;
1768
1769 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1770 if (ret < 0)
1771 goto done;
1772 }
1773
1774 if (pdata->wolopts & WAKE_MAGIC) {
1775 /* clear any pending magic packet status */
1776 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1777 if (ret < 0)
1778 goto done;
1779
1780 val |= WUCSR_MPR_;
1781
1782 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1783 if (ret < 0)
1784 goto done;
1785 }
1786
1787 /* enable/disable wakeup sources */
1788 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1789 if (ret < 0)
1790 goto done;
1791
1792 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1793 netdev_info(dev->net, "enabling pattern match wakeup\n");
1794 val |= WUCSR_WAKE_EN_;
1795 } else {
1796 netdev_info(dev->net, "disabling pattern match wakeup\n");
1797 val &= ~WUCSR_WAKE_EN_;
1798 }
1799
1800 if (pdata->wolopts & WAKE_MAGIC) {
1801 netdev_info(dev->net, "enabling magic packet wakeup\n");
1802 val |= WUCSR_MPEN_;
1803 } else {
1804 netdev_info(dev->net, "disabling magic packet wakeup\n");
1805 val &= ~WUCSR_MPEN_;
1806 }
1807
1808 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1809 if (ret < 0)
1810 goto done;
1811
1812 /* enable wol wakeup source */
1813 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1814 if (ret < 0)
1815 goto done;
1816
1817 val |= PM_CTL_WOL_EN_;
1818
1819 /* phy energy detect wakeup source */
1820 if (pdata->wolopts & WAKE_PHY)
1821 val |= PM_CTL_ED_EN_;
1822
1823 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1824 if (ret < 0)
1825 goto done;
1826
1827 /* enable receiver to enable frame reception */
1828 smsc95xx_start_rx_path(dev, 1);
1829
1830 /* some wol options are enabled, so enter SUSPEND0 */
1831 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1832 ret = smsc95xx_enter_suspend0(dev);
1833
1834done:
1835 /*
1836 * TODO: resume() might need to handle the suspend failure
1837 * in system sleep
1838 */
1839 if (ret && PMSG_IS_AUTO(message))
1840 usbnet_resume(intf);
1841
1842 if (ret)
1843 schedule_delayed_work(&pdata->carrier_check,
1844 CARRIER_CHECK_DELAY);
1845
1846 return ret;
1847}
1848
1849static int smsc95xx_resume(struct usb_interface *intf)
1850{
1851 struct usbnet *dev = usb_get_intfdata(intf);
1852 struct smsc95xx_priv *pdata;
1853 u8 suspend_flags;
1854 int ret;
1855 u32 val;
1856
1857 BUG_ON(!dev);
1858 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1859 suspend_flags = pdata->suspend_flags;
1860
1861 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1862
1863 /* do this first to ensure it's cleared even in error case */
1864 pdata->suspend_flags = 0;
1865 schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1866
1867 if (suspend_flags & SUSPEND_ALLMODES) {
1868 /* clear wake-up sources */
1869 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1870 if (ret < 0)
1871 return ret;
1872
1873 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1874
1875 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1876 if (ret < 0)
1877 return ret;
1878
1879 /* clear wake-up status */
1880 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1881 if (ret < 0)
1882 return ret;
1883
1884 val &= ~PM_CTL_WOL_EN_;
1885 val |= PM_CTL_WUPS_;
1886
1887 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1888 if (ret < 0)
1889 return ret;
1890 }
1891
1892 ret = usbnet_resume(intf);
1893 if (ret < 0)
1894 netdev_warn(dev->net, "usbnet_resume error\n");
1895
1896 return ret;
1897}
1898
1899static int smsc95xx_reset_resume(struct usb_interface *intf)
1900{
1901 struct usbnet *dev = usb_get_intfdata(intf);
1902 int ret;
1903
1904 ret = smsc95xx_reset(dev);
1905 if (ret < 0)
1906 return ret;
1907
1908 return smsc95xx_resume(intf);
1909}
1910
1911static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1912{
1913 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1914 skb->ip_summed = CHECKSUM_COMPLETE;
1915 skb_trim(skb, skb->len - 2);
1916}
1917
1918static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1919{
1920 /* This check is no longer done by usbnet */
1921 if (skb->len < dev->net->hard_header_len)
1922 return 0;
1923
1924 while (skb->len > 0) {
1925 u32 header, align_count;
1926 struct sk_buff *ax_skb;
1927 unsigned char *packet;
1928 u16 size;
1929
1930 header = get_unaligned_le32(skb->data);
1931 skb_pull(skb, 4 + NET_IP_ALIGN);
1932 packet = skb->data;
1933
1934 /* get the packet length */
1935 size = (u16)((header & RX_STS_FL_) >> 16);
1936 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1937
1938 if (unlikely(header & RX_STS_ES_)) {
1939 netif_dbg(dev, rx_err, dev->net,
1940 "Error header=0x%08x\n", header);
1941 dev->net->stats.rx_errors++;
1942 dev->net->stats.rx_dropped++;
1943
1944 if (header & RX_STS_CRC_) {
1945 dev->net->stats.rx_crc_errors++;
1946 } else {
1947 if (header & (RX_STS_TL_ | RX_STS_RF_))
1948 dev->net->stats.rx_frame_errors++;
1949
1950 if ((header & RX_STS_LE_) &&
1951 (!(header & RX_STS_FT_)))
1952 dev->net->stats.rx_length_errors++;
1953 }
1954 } else {
1955 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1956 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1957 netif_dbg(dev, rx_err, dev->net,
1958 "size err header=0x%08x\n", header);
1959 return 0;
1960 }
1961
1962 /* last frame in this batch */
1963 if (skb->len == size) {
1964 if (dev->net->features & NETIF_F_RXCSUM)
1965 smsc95xx_rx_csum_offload(skb);
1966 skb_trim(skb, skb->len - 4); /* remove fcs */
1967 skb->truesize = size + sizeof(struct sk_buff);
1968
1969 return 1;
1970 }
1971
1972 ax_skb = skb_clone(skb, GFP_ATOMIC);
1973 if (unlikely(!ax_skb)) {
1974 netdev_warn(dev->net, "Error allocating skb\n");
1975 return 0;
1976 }
1977
1978 ax_skb->len = size;
1979 ax_skb->data = packet;
1980 skb_set_tail_pointer(ax_skb, size);
1981
1982 if (dev->net->features & NETIF_F_RXCSUM)
1983 smsc95xx_rx_csum_offload(ax_skb);
1984 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1985 ax_skb->truesize = size + sizeof(struct sk_buff);
1986
1987 usbnet_skb_return(dev, ax_skb);
1988 }
1989
1990 skb_pull(skb, size);
1991
1992 /* padding bytes before the next frame starts */
1993 if (skb->len)
1994 skb_pull(skb, align_count);
1995 }
1996
1997 return 1;
1998}
1999
2000static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
2001{
2002 u16 low_16 = (u16)skb_checksum_start_offset(skb);
2003 u16 high_16 = low_16 + skb->csum_offset;
2004 return (high_16 << 16) | low_16;
2005}
2006
2007/* The TX CSUM won't work if the checksum lies in the last 4 bytes of the
2008 * transmission. This is fairly unlikely, only seems to trigger with some
2009 * short TCP ACK packets sent.
2010 *
2011 * Note, this calculation should probably check for the alignment of the
2012 * data as well, but a straight check for csum being in the last four bytes
2013 * of the packet should be ok for now.
2014 */
2015static bool smsc95xx_can_tx_checksum(struct sk_buff *skb)
2016{
2017 unsigned int len = skb->len - skb_checksum_start_offset(skb);
2018
2019 if (skb->len <= 45)
2020 return false;
2021 return skb->csum_offset < (len - (4 + 1));
2022}
2023
2024static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
2025 struct sk_buff *skb, gfp_t flags)
2026{
2027 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2028 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2029 u32 tx_cmd_a, tx_cmd_b;
2030 void *ptr;
2031
2032 /* We do not advertise SG, so skbs should be already linearized */
2033 BUG_ON(skb_shinfo(skb)->nr_frags);
2034
2035 /* Make writable and expand header space by overhead if required */
2036 if (skb_cow_head(skb, overhead)) {
2037 /* Must deallocate here as returning NULL to indicate error
2038 * means the skb won't be deallocated in the caller.
2039 */
2040 dev_kfree_skb_any(skb);
2041 return NULL;
2042 }
2043
2044 tx_cmd_b = (u32)skb->len;
2045 tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
2046
2047 if (csum) {
2048 if (!smsc95xx_can_tx_checksum(skb)) {
2049 /* workaround - hardware tx checksum does not work
2050 * properly with extremely small packets */
2051 long csstart = skb_checksum_start_offset(skb);
2052 __wsum calc = csum_partial(skb->data + csstart,
2053 skb->len - csstart, 0);
2054 *((__sum16 *)(skb->data + csstart
2055 + skb->csum_offset)) = csum_fold(calc);
2056
2057 csum = false;
2058 } else {
2059 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2060 ptr = skb_push(skb, 4);
2061 put_unaligned_le32(csum_preamble, ptr);
2062
2063 tx_cmd_a += 4;
2064 tx_cmd_b += 4;
2065 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2066 }
2067 }
2068
2069 ptr = skb_push(skb, 8);
2070 put_unaligned_le32(tx_cmd_a, ptr);
2071 put_unaligned_le32(tx_cmd_b, ptr+4);
2072
2073 return skb;
2074}
2075
2076static int smsc95xx_manage_power(struct usbnet *dev, int on)
2077{
2078 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2079
2080 dev->intf->needs_remote_wakeup = on;
2081
2082 if (pdata->features & FEATURE_REMOTE_WAKEUP)
2083 return 0;
2084
2085 /* this chip revision isn't capable of remote wakeup */
2086 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2087
2088 if (on)
2089 usb_autopm_get_interface_no_resume(dev->intf);
2090 else
2091 usb_autopm_put_interface(dev->intf);
2092
2093 return 0;
2094}
2095
2096static const struct driver_info smsc95xx_info = {
2097 .description = "smsc95xx USB 2.0 Ethernet",
2098 .bind = smsc95xx_bind,
2099 .unbind = smsc95xx_unbind,
2100 .link_reset = smsc95xx_link_reset,
2101 .reset = smsc95xx_reset,
2102 .rx_fixup = smsc95xx_rx_fixup,
2103 .tx_fixup = smsc95xx_tx_fixup,
2104 .status = smsc95xx_status,
2105 .manage_power = smsc95xx_manage_power,
2106 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2107};
2108
2109static const struct usb_device_id products[] = {
2110 {
2111 /* SMSC9500 USB Ethernet Device */
2112 USB_DEVICE(0x0424, 0x9500),
2113 .driver_info = (unsigned long) &smsc95xx_info,
2114 },
2115 {
2116 /* SMSC9505 USB Ethernet Device */
2117 USB_DEVICE(0x0424, 0x9505),
2118 .driver_info = (unsigned long) &smsc95xx_info,
2119 },
2120 {
2121 /* SMSC9500A USB Ethernet Device */
2122 USB_DEVICE(0x0424, 0x9E00),
2123 .driver_info = (unsigned long) &smsc95xx_info,
2124 },
2125 {
2126 /* SMSC9505A USB Ethernet Device */
2127 USB_DEVICE(0x0424, 0x9E01),
2128 .driver_info = (unsigned long) &smsc95xx_info,
2129 },
2130 {
2131 /* SMSC9512/9514 USB Hub & Ethernet Device */
2132 USB_DEVICE(0x0424, 0xec00),
2133 .driver_info = (unsigned long) &smsc95xx_info,
2134 },
2135 {
2136 /* SMSC9500 USB Ethernet Device (SAL10) */
2137 USB_DEVICE(0x0424, 0x9900),
2138 .driver_info = (unsigned long) &smsc95xx_info,
2139 },
2140 {
2141 /* SMSC9505 USB Ethernet Device (SAL10) */
2142 USB_DEVICE(0x0424, 0x9901),
2143 .driver_info = (unsigned long) &smsc95xx_info,
2144 },
2145 {
2146 /* SMSC9500A USB Ethernet Device (SAL10) */
2147 USB_DEVICE(0x0424, 0x9902),
2148 .driver_info = (unsigned long) &smsc95xx_info,
2149 },
2150 {
2151 /* SMSC9505A USB Ethernet Device (SAL10) */
2152 USB_DEVICE(0x0424, 0x9903),
2153 .driver_info = (unsigned long) &smsc95xx_info,
2154 },
2155 {
2156 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2157 USB_DEVICE(0x0424, 0x9904),
2158 .driver_info = (unsigned long) &smsc95xx_info,
2159 },
2160 {
2161 /* SMSC9500A USB Ethernet Device (HAL) */
2162 USB_DEVICE(0x0424, 0x9905),
2163 .driver_info = (unsigned long) &smsc95xx_info,
2164 },
2165 {
2166 /* SMSC9505A USB Ethernet Device (HAL) */
2167 USB_DEVICE(0x0424, 0x9906),
2168 .driver_info = (unsigned long) &smsc95xx_info,
2169 },
2170 {
2171 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2172 USB_DEVICE(0x0424, 0x9907),
2173 .driver_info = (unsigned long) &smsc95xx_info,
2174 },
2175 {
2176 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2177 USB_DEVICE(0x0424, 0x9908),
2178 .driver_info = (unsigned long) &smsc95xx_info,
2179 },
2180 {
2181 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2182 USB_DEVICE(0x0424, 0x9909),
2183 .driver_info = (unsigned long) &smsc95xx_info,
2184 },
2185 {
2186 /* SMSC LAN9530 USB Ethernet Device */
2187 USB_DEVICE(0x0424, 0x9530),
2188 .driver_info = (unsigned long) &smsc95xx_info,
2189 },
2190 {
2191 /* SMSC LAN9730 USB Ethernet Device */
2192 USB_DEVICE(0x0424, 0x9730),
2193 .driver_info = (unsigned long) &smsc95xx_info,
2194 },
2195 {
2196 /* SMSC LAN89530 USB Ethernet Device */
2197 USB_DEVICE(0x0424, 0x9E08),
2198 .driver_info = (unsigned long) &smsc95xx_info,
2199 },
2200 { }, /* END */
2201};
2202MODULE_DEVICE_TABLE(usb, products);
2203
2204static struct usb_driver smsc95xx_driver = {
2205 .name = "smsc95xx",
2206 .id_table = products,
2207 .probe = usbnet_probe,
2208 .suspend = smsc95xx_suspend,
2209 .resume = smsc95xx_resume,
2210 .reset_resume = smsc95xx_reset_resume,
2211 .disconnect = usbnet_disconnect,
2212 .disable_hub_initiated_lpm = 1,
2213 .supports_autosuspend = 1,
2214};
2215
2216module_usb_driver(smsc95xx_driver);
2217
2218MODULE_AUTHOR("Nancy Lin");
2219MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2220MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2221MODULE_LICENSE("GPL");