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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 /***************************************************************************
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, see <http://www.gnu.org/licenses/>.
17 *
18 *****************************************************************************/
19
20#include <linux/module.h>
21#include <linux/kmod.h>
22#include <linux/netdevice.h>
23#include <linux/etherdevice.h>
24#include <linux/ethtool.h>
25#include <linux/mii.h>
26#include <linux/usb.h>
27#include <linux/bitrev.h>
28#include <linux/crc16.h>
29#include <linux/crc32.h>
30#include <linux/usb/usbnet.h>
31#include <linux/slab.h>
32#include <linux/of_net.h>
33#include "smsc95xx.h"
34
35#define SMSC_CHIPNAME "smsc95xx"
36#define SMSC_DRIVER_VERSION "1.0.4"
37#define HS_USB_PKT_SIZE (512)
38#define FS_USB_PKT_SIZE (64)
39#define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE)
40#define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE)
41#define DEFAULT_BULK_IN_DELAY (0x00002000)
42#define MAX_SINGLE_PACKET_SIZE (2048)
43#define LAN95XX_EEPROM_MAGIC (0x9500)
44#define EEPROM_MAC_OFFSET (0x01)
45#define DEFAULT_TX_CSUM_ENABLE (true)
46#define DEFAULT_RX_CSUM_ENABLE (true)
47#define SMSC95XX_INTERNAL_PHY_ID (1)
48#define SMSC95XX_TX_OVERHEAD (8)
49#define SMSC95XX_TX_OVERHEAD_CSUM (12)
50#define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
51 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
52
53#define FEATURE_8_WAKEUP_FILTERS (0x01)
54#define FEATURE_PHY_NLP_CROSSOVER (0x02)
55#define FEATURE_REMOTE_WAKEUP (0x04)
56
57#define SUSPEND_SUSPEND0 (0x01)
58#define SUSPEND_SUSPEND1 (0x02)
59#define SUSPEND_SUSPEND2 (0x04)
60#define SUSPEND_SUSPEND3 (0x08)
61#define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
62 SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
63
64struct smsc95xx_priv {
65 u32 mac_cr;
66 u32 hash_hi;
67 u32 hash_lo;
68 u32 wolopts;
69 spinlock_t mac_cr_lock;
70 u8 features;
71 u8 suspend_flags;
72};
73
74static bool turbo_mode = true;
75module_param(turbo_mode, bool, 0644);
76MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
77
78static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
79 u32 *data, int in_pm)
80{
81 u32 buf;
82 int ret;
83 int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
84
85 BUG_ON(!dev);
86
87 if (!in_pm)
88 fn = usbnet_read_cmd;
89 else
90 fn = usbnet_read_cmd_nopm;
91
92 ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
93 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
94 0, index, &buf, 4);
95 if (unlikely(ret < 0))
96 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
97 index, ret);
98
99 le32_to_cpus(&buf);
100 *data = buf;
101
102 return ret;
103}
104
105static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
106 u32 data, int in_pm)
107{
108 u32 buf;
109 int ret;
110 int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
111
112 BUG_ON(!dev);
113
114 if (!in_pm)
115 fn = usbnet_write_cmd;
116 else
117 fn = usbnet_write_cmd_nopm;
118
119 buf = data;
120 cpu_to_le32s(&buf);
121
122 ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
123 | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
124 0, index, &buf, 4);
125 if (unlikely(ret < 0))
126 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
127 index, ret);
128
129 return ret;
130}
131
132static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
133 u32 *data)
134{
135 return __smsc95xx_read_reg(dev, index, data, 1);
136}
137
138static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
139 u32 data)
140{
141 return __smsc95xx_write_reg(dev, index, data, 1);
142}
143
144static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
145 u32 *data)
146{
147 return __smsc95xx_read_reg(dev, index, data, 0);
148}
149
150static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
151 u32 data)
152{
153 return __smsc95xx_write_reg(dev, index, data, 0);
154}
155
156/* Loop until the read is completed with timeout
157 * called with phy_mutex held */
158static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
159 int in_pm)
160{
161 unsigned long start_time = jiffies;
162 u32 val;
163 int ret;
164
165 do {
166 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
167 if (ret < 0) {
168 netdev_warn(dev->net, "Error reading MII_ACCESS\n");
169 return ret;
170 }
171
172 if (!(val & MII_BUSY_))
173 return 0;
174 } while (!time_after(jiffies, start_time + HZ));
175
176 return -EIO;
177}
178
179static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
180 int in_pm)
181{
182 struct usbnet *dev = netdev_priv(netdev);
183 u32 val, addr;
184 int ret;
185
186 mutex_lock(&dev->phy_mutex);
187
188 /* confirm MII not busy */
189 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
190 if (ret < 0) {
191 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
192 goto done;
193 }
194
195 /* set the address, index & direction (read from PHY) */
196 phy_id &= dev->mii.phy_id_mask;
197 idx &= dev->mii.reg_num_mask;
198 addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
199 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
200 if (ret < 0) {
201 netdev_warn(dev->net, "Error writing MII_ADDR\n");
202 goto done;
203 }
204
205 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
206 if (ret < 0) {
207 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
208 goto done;
209 }
210
211 ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
212 if (ret < 0) {
213 netdev_warn(dev->net, "Error reading MII_DATA\n");
214 goto done;
215 }
216
217 ret = (u16)(val & 0xFFFF);
218
219done:
220 mutex_unlock(&dev->phy_mutex);
221 return ret;
222}
223
224static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
225 int idx, int regval, int in_pm)
226{
227 struct usbnet *dev = netdev_priv(netdev);
228 u32 val, addr;
229 int ret;
230
231 mutex_lock(&dev->phy_mutex);
232
233 /* confirm MII not busy */
234 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
235 if (ret < 0) {
236 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
237 goto done;
238 }
239
240 val = regval;
241 ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
242 if (ret < 0) {
243 netdev_warn(dev->net, "Error writing MII_DATA\n");
244 goto done;
245 }
246
247 /* set the address, index & direction (write to PHY) */
248 phy_id &= dev->mii.phy_id_mask;
249 idx &= dev->mii.reg_num_mask;
250 addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
251 ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
252 if (ret < 0) {
253 netdev_warn(dev->net, "Error writing MII_ADDR\n");
254 goto done;
255 }
256
257 ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
258 if (ret < 0) {
259 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
260 goto done;
261 }
262
263done:
264 mutex_unlock(&dev->phy_mutex);
265}
266
267static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
268 int idx)
269{
270 return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
271}
272
273static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
274 int idx, int regval)
275{
276 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
277}
278
279static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
280{
281 return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
282}
283
284static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
285 int regval)
286{
287 __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
288}
289
290static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
291{
292 unsigned long start_time = jiffies;
293 u32 val;
294 int ret;
295
296 do {
297 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
298 if (ret < 0) {
299 netdev_warn(dev->net, "Error reading E2P_CMD\n");
300 return ret;
301 }
302
303 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
304 break;
305 udelay(40);
306 } while (!time_after(jiffies, start_time + HZ));
307
308 if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
309 netdev_warn(dev->net, "EEPROM read operation timeout\n");
310 return -EIO;
311 }
312
313 return 0;
314}
315
316static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
317{
318 unsigned long start_time = jiffies;
319 u32 val;
320 int ret;
321
322 do {
323 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
324 if (ret < 0) {
325 netdev_warn(dev->net, "Error reading E2P_CMD\n");
326 return ret;
327 }
328
329 if (!(val & E2P_CMD_BUSY_))
330 return 0;
331
332 udelay(40);
333 } while (!time_after(jiffies, start_time + HZ));
334
335 netdev_warn(dev->net, "EEPROM is busy\n");
336 return -EIO;
337}
338
339static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
340 u8 *data)
341{
342 u32 val;
343 int i, ret;
344
345 BUG_ON(!dev);
346 BUG_ON(!data);
347
348 ret = smsc95xx_eeprom_confirm_not_busy(dev);
349 if (ret)
350 return ret;
351
352 for (i = 0; i < length; i++) {
353 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
354 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
355 if (ret < 0) {
356 netdev_warn(dev->net, "Error writing E2P_CMD\n");
357 return ret;
358 }
359
360 ret = smsc95xx_wait_eeprom(dev);
361 if (ret < 0)
362 return ret;
363
364 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
365 if (ret < 0) {
366 netdev_warn(dev->net, "Error reading E2P_DATA\n");
367 return ret;
368 }
369
370 data[i] = val & 0xFF;
371 offset++;
372 }
373
374 return 0;
375}
376
377static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
378 u8 *data)
379{
380 u32 val;
381 int i, ret;
382
383 BUG_ON(!dev);
384 BUG_ON(!data);
385
386 ret = smsc95xx_eeprom_confirm_not_busy(dev);
387 if (ret)
388 return ret;
389
390 /* Issue write/erase enable command */
391 val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
392 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
393 if (ret < 0) {
394 netdev_warn(dev->net, "Error writing E2P_DATA\n");
395 return ret;
396 }
397
398 ret = smsc95xx_wait_eeprom(dev);
399 if (ret < 0)
400 return ret;
401
402 for (i = 0; i < length; i++) {
403
404 /* Fill data register */
405 val = data[i];
406 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
407 if (ret < 0) {
408 netdev_warn(dev->net, "Error writing E2P_DATA\n");
409 return ret;
410 }
411
412 /* Send "write" command */
413 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
414 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
415 if (ret < 0) {
416 netdev_warn(dev->net, "Error writing E2P_CMD\n");
417 return ret;
418 }
419
420 ret = smsc95xx_wait_eeprom(dev);
421 if (ret < 0)
422 return ret;
423
424 offset++;
425 }
426
427 return 0;
428}
429
430static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
431 u32 data)
432{
433 const u16 size = 4;
434 u32 buf;
435 int ret;
436
437 buf = data;
438 cpu_to_le32s(&buf);
439
440 ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
441 USB_DIR_OUT | USB_TYPE_VENDOR |
442 USB_RECIP_DEVICE,
443 0, index, &buf, size);
444 if (ret < 0)
445 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
446 ret);
447 return ret;
448}
449
450/* returns hash bit number for given MAC address
451 * example:
452 * 01 00 5E 00 00 01 -> returns bit number 31 */
453static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
454{
455 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
456}
457
458static void smsc95xx_set_multicast(struct net_device *netdev)
459{
460 struct usbnet *dev = netdev_priv(netdev);
461 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
462 unsigned long flags;
463 int ret;
464
465 pdata->hash_hi = 0;
466 pdata->hash_lo = 0;
467
468 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
469
470 if (dev->net->flags & IFF_PROMISC) {
471 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
472 pdata->mac_cr |= MAC_CR_PRMS_;
473 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
474 } else if (dev->net->flags & IFF_ALLMULTI) {
475 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
476 pdata->mac_cr |= MAC_CR_MCPAS_;
477 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
478 } else if (!netdev_mc_empty(dev->net)) {
479 struct netdev_hw_addr *ha;
480
481 pdata->mac_cr |= MAC_CR_HPFILT_;
482 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
483
484 netdev_for_each_mc_addr(ha, netdev) {
485 u32 bitnum = smsc95xx_hash(ha->addr);
486 u32 mask = 0x01 << (bitnum & 0x1F);
487 if (bitnum & 0x20)
488 pdata->hash_hi |= mask;
489 else
490 pdata->hash_lo |= mask;
491 }
492
493 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
494 pdata->hash_hi, pdata->hash_lo);
495 } else {
496 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
497 pdata->mac_cr &=
498 ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
499 }
500
501 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
502
503 /* Initiate async writes, as we can't wait for completion here */
504 ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
505 if (ret < 0)
506 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
507
508 ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
509 if (ret < 0)
510 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
511
512 ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
513 if (ret < 0)
514 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
515}
516
517static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
518 u16 lcladv, u16 rmtadv)
519{
520 u32 flow, afc_cfg = 0;
521
522 int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
523 if (ret < 0)
524 return ret;
525
526 if (duplex == DUPLEX_FULL) {
527 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
528
529 if (cap & FLOW_CTRL_RX)
530 flow = 0xFFFF0002;
531 else
532 flow = 0;
533
534 if (cap & FLOW_CTRL_TX)
535 afc_cfg |= 0xF;
536 else
537 afc_cfg &= ~0xF;
538
539 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
540 cap & FLOW_CTRL_RX ? "enabled" : "disabled",
541 cap & FLOW_CTRL_TX ? "enabled" : "disabled");
542 } else {
543 netif_dbg(dev, link, dev->net, "half duplex\n");
544 flow = 0;
545 afc_cfg |= 0xF;
546 }
547
548 ret = smsc95xx_write_reg(dev, FLOW, flow);
549 if (ret < 0)
550 return ret;
551
552 return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
553}
554
555static int smsc95xx_link_reset(struct usbnet *dev)
556{
557 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
558 struct mii_if_info *mii = &dev->mii;
559 struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
560 unsigned long flags;
561 u16 lcladv, rmtadv;
562 int ret;
563
564 /* clear interrupt status */
565 ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
566 if (ret < 0)
567 return ret;
568
569 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
570 if (ret < 0)
571 return ret;
572
573 mii_check_media(mii, 1, 1);
574 mii_ethtool_gset(&dev->mii, &ecmd);
575 lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
576 rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
577
578 netif_dbg(dev, link, dev->net,
579 "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
580 ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
581
582 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
583 if (ecmd.duplex != DUPLEX_FULL) {
584 pdata->mac_cr &= ~MAC_CR_FDPX_;
585 pdata->mac_cr |= MAC_CR_RCVOWN_;
586 } else {
587 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
588 pdata->mac_cr |= MAC_CR_FDPX_;
589 }
590 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
591
592 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
593 if (ret < 0)
594 return ret;
595
596 ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
597 if (ret < 0)
598 netdev_warn(dev->net, "Error updating PHY flow control\n");
599
600 return ret;
601}
602
603static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
604{
605 u32 intdata;
606
607 if (urb->actual_length != 4) {
608 netdev_warn(dev->net, "unexpected urb length %d\n",
609 urb->actual_length);
610 return;
611 }
612
613 memcpy(&intdata, urb->transfer_buffer, 4);
614 le32_to_cpus(&intdata);
615
616 netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
617
618 if (intdata & INT_ENP_PHY_INT_)
619 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
620 else
621 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
622 intdata);
623}
624
625/* Enable or disable Tx & Rx checksum offload engines */
626static int smsc95xx_set_features(struct net_device *netdev,
627 netdev_features_t features)
628{
629 struct usbnet *dev = netdev_priv(netdev);
630 u32 read_buf;
631 int ret;
632
633 ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
634 if (ret < 0)
635 return ret;
636
637 if (features & NETIF_F_HW_CSUM)
638 read_buf |= Tx_COE_EN_;
639 else
640 read_buf &= ~Tx_COE_EN_;
641
642 if (features & NETIF_F_RXCSUM)
643 read_buf |= Rx_COE_EN_;
644 else
645 read_buf &= ~Rx_COE_EN_;
646
647 ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
648 if (ret < 0)
649 return ret;
650
651 netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
652 return 0;
653}
654
655static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
656{
657 return MAX_EEPROM_SIZE;
658}
659
660static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
661 struct ethtool_eeprom *ee, u8 *data)
662{
663 struct usbnet *dev = netdev_priv(netdev);
664
665 ee->magic = LAN95XX_EEPROM_MAGIC;
666
667 return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
668}
669
670static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
671 struct ethtool_eeprom *ee, u8 *data)
672{
673 struct usbnet *dev = netdev_priv(netdev);
674
675 if (ee->magic != LAN95XX_EEPROM_MAGIC) {
676 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
677 ee->magic);
678 return -EINVAL;
679 }
680
681 return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
682}
683
684static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
685{
686 /* all smsc95xx registers */
687 return COE_CR - ID_REV + sizeof(u32);
688}
689
690static void
691smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
692 void *buf)
693{
694 struct usbnet *dev = netdev_priv(netdev);
695 unsigned int i, j;
696 int retval;
697 u32 *data = buf;
698
699 retval = smsc95xx_read_reg(dev, ID_REV, ®s->version);
700 if (retval < 0) {
701 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
702 return;
703 }
704
705 for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
706 retval = smsc95xx_read_reg(dev, i, &data[j]);
707 if (retval < 0) {
708 netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
709 return;
710 }
711 }
712}
713
714static void smsc95xx_ethtool_get_wol(struct net_device *net,
715 struct ethtool_wolinfo *wolinfo)
716{
717 struct usbnet *dev = netdev_priv(net);
718 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
719
720 wolinfo->supported = SUPPORTED_WAKE;
721 wolinfo->wolopts = pdata->wolopts;
722}
723
724static int smsc95xx_ethtool_set_wol(struct net_device *net,
725 struct ethtool_wolinfo *wolinfo)
726{
727 struct usbnet *dev = netdev_priv(net);
728 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
729 int ret;
730
731 pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
732
733 ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
734 if (ret < 0)
735 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
736
737 return ret;
738}
739
740static const struct ethtool_ops smsc95xx_ethtool_ops = {
741 .get_link = usbnet_get_link,
742 .nway_reset = usbnet_nway_reset,
743 .get_drvinfo = usbnet_get_drvinfo,
744 .get_msglevel = usbnet_get_msglevel,
745 .set_msglevel = usbnet_set_msglevel,
746 .get_settings = usbnet_get_settings,
747 .set_settings = usbnet_set_settings,
748 .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
749 .get_eeprom = smsc95xx_ethtool_get_eeprom,
750 .set_eeprom = smsc95xx_ethtool_set_eeprom,
751 .get_regs_len = smsc95xx_ethtool_getregslen,
752 .get_regs = smsc95xx_ethtool_getregs,
753 .get_wol = smsc95xx_ethtool_get_wol,
754 .set_wol = smsc95xx_ethtool_set_wol,
755};
756
757static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
758{
759 struct usbnet *dev = netdev_priv(netdev);
760
761 if (!netif_running(netdev))
762 return -EINVAL;
763
764 return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
765}
766
767static void smsc95xx_init_mac_address(struct usbnet *dev)
768{
769 const u8 *mac_addr;
770
771 /* maybe the boot loader passed the MAC address in devicetree */
772 mac_addr = of_get_mac_address(dev->udev->dev.of_node);
773 if (mac_addr) {
774 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
775 return;
776 }
777
778 /* try reading mac address from EEPROM */
779 if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
780 dev->net->dev_addr) == 0) {
781 if (is_valid_ether_addr(dev->net->dev_addr)) {
782 /* eeprom values are valid so use them */
783 netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
784 return;
785 }
786 }
787
788 /* no useful static MAC address found. generate a random one */
789 eth_hw_addr_random(dev->net);
790 netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
791}
792
793static int smsc95xx_set_mac_address(struct usbnet *dev)
794{
795 u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
796 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
797 u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
798 int ret;
799
800 ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
801 if (ret < 0)
802 return ret;
803
804 return smsc95xx_write_reg(dev, ADDRH, addr_hi);
805}
806
807/* starts the TX path */
808static int smsc95xx_start_tx_path(struct usbnet *dev)
809{
810 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
811 unsigned long flags;
812 int ret;
813
814 /* Enable Tx at MAC */
815 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
816 pdata->mac_cr |= MAC_CR_TXEN_;
817 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
818
819 ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
820 if (ret < 0)
821 return ret;
822
823 /* Enable Tx at SCSRs */
824 return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
825}
826
827/* Starts the Receive path */
828static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
829{
830 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
831 unsigned long flags;
832
833 spin_lock_irqsave(&pdata->mac_cr_lock, flags);
834 pdata->mac_cr |= MAC_CR_RXEN_;
835 spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
836
837 return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
838}
839
840static int smsc95xx_phy_initialize(struct usbnet *dev)
841{
842 int bmcr, ret, timeout = 0;
843
844 /* Initialize MII structure */
845 dev->mii.dev = dev->net;
846 dev->mii.mdio_read = smsc95xx_mdio_read;
847 dev->mii.mdio_write = smsc95xx_mdio_write;
848 dev->mii.phy_id_mask = 0x1f;
849 dev->mii.reg_num_mask = 0x1f;
850 dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
851
852 /* reset phy and wait for reset to complete */
853 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
854
855 do {
856 msleep(10);
857 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
858 timeout++;
859 } while ((bmcr & BMCR_RESET) && (timeout < 100));
860
861 if (timeout >= 100) {
862 netdev_warn(dev->net, "timeout on PHY Reset");
863 return -EIO;
864 }
865
866 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
867 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
868 ADVERTISE_PAUSE_ASYM);
869
870 /* read to clear */
871 ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
872 if (ret < 0) {
873 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
874 return ret;
875 }
876
877 smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
878 PHY_INT_MASK_DEFAULT_);
879 mii_nway_restart(&dev->mii);
880
881 netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
882 return 0;
883}
884
885static int smsc95xx_reset(struct usbnet *dev)
886{
887 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
888 u32 read_buf, write_buf, burst_cap;
889 int ret = 0, timeout;
890
891 netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
892
893 ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
894 if (ret < 0)
895 return ret;
896
897 timeout = 0;
898 do {
899 msleep(10);
900 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
901 if (ret < 0)
902 return ret;
903 timeout++;
904 } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
905
906 if (timeout >= 100) {
907 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
908 return ret;
909 }
910
911 ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
912 if (ret < 0)
913 return ret;
914
915 timeout = 0;
916 do {
917 msleep(10);
918 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
919 if (ret < 0)
920 return ret;
921 timeout++;
922 } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
923
924 if (timeout >= 100) {
925 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
926 return ret;
927 }
928
929 ret = smsc95xx_set_mac_address(dev);
930 if (ret < 0)
931 return ret;
932
933 netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
934 dev->net->dev_addr);
935
936 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
937 if (ret < 0)
938 return ret;
939
940 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
941 read_buf);
942
943 read_buf |= HW_CFG_BIR_;
944
945 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
946 if (ret < 0)
947 return ret;
948
949 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
950 if (ret < 0)
951 return ret;
952
953 netif_dbg(dev, ifup, dev->net,
954 "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
955 read_buf);
956
957 if (!turbo_mode) {
958 burst_cap = 0;
959 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
960 } else if (dev->udev->speed == USB_SPEED_HIGH) {
961 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
962 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
963 } else {
964 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
965 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
966 }
967
968 netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
969 (ulong)dev->rx_urb_size);
970
971 ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
972 if (ret < 0)
973 return ret;
974
975 ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
976 if (ret < 0)
977 return ret;
978
979 netif_dbg(dev, ifup, dev->net,
980 "Read Value from BURST_CAP after writing: 0x%08x\n",
981 read_buf);
982
983 ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
984 if (ret < 0)
985 return ret;
986
987 ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
988 if (ret < 0)
989 return ret;
990
991 netif_dbg(dev, ifup, dev->net,
992 "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
993 read_buf);
994
995 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
996 if (ret < 0)
997 return ret;
998
999 netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1000 read_buf);
1001
1002 if (turbo_mode)
1003 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1004
1005 read_buf &= ~HW_CFG_RXDOFF_;
1006
1007 /* set Rx data offset=2, Make IP header aligns on word boundary. */
1008 read_buf |= NET_IP_ALIGN << 9;
1009
1010 ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1011 if (ret < 0)
1012 return ret;
1013
1014 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1015 if (ret < 0)
1016 return ret;
1017
1018 netif_dbg(dev, ifup, dev->net,
1019 "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1020
1021 ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1022 if (ret < 0)
1023 return ret;
1024
1025 ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1026 if (ret < 0)
1027 return ret;
1028 netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1029
1030 /* Configure GPIO pins as LED outputs */
1031 write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1032 LED_GPIO_CFG_FDX_LED;
1033 ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1034 if (ret < 0)
1035 return ret;
1036
1037 /* Init Tx */
1038 ret = smsc95xx_write_reg(dev, FLOW, 0);
1039 if (ret < 0)
1040 return ret;
1041
1042 ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1043 if (ret < 0)
1044 return ret;
1045
1046 /* Don't need mac_cr_lock during initialisation */
1047 ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1048 if (ret < 0)
1049 return ret;
1050
1051 /* Init Rx */
1052 /* Set Vlan */
1053 ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1054 if (ret < 0)
1055 return ret;
1056
1057 /* Enable or disable checksum offload engines */
1058 ret = smsc95xx_set_features(dev->net, dev->net->features);
1059 if (ret < 0) {
1060 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1061 return ret;
1062 }
1063
1064 smsc95xx_set_multicast(dev->net);
1065
1066 ret = smsc95xx_phy_initialize(dev);
1067 if (ret < 0) {
1068 netdev_warn(dev->net, "Failed to init PHY\n");
1069 return ret;
1070 }
1071
1072 ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1073 if (ret < 0)
1074 return ret;
1075
1076 /* enable PHY interrupts */
1077 read_buf |= INT_EP_CTL_PHY_INT_;
1078
1079 ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1080 if (ret < 0)
1081 return ret;
1082
1083 ret = smsc95xx_start_tx_path(dev);
1084 if (ret < 0) {
1085 netdev_warn(dev->net, "Failed to start TX path\n");
1086 return ret;
1087 }
1088
1089 ret = smsc95xx_start_rx_path(dev, 0);
1090 if (ret < 0) {
1091 netdev_warn(dev->net, "Failed to start RX path\n");
1092 return ret;
1093 }
1094
1095 netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1096 return 0;
1097}
1098
1099static const struct net_device_ops smsc95xx_netdev_ops = {
1100 .ndo_open = usbnet_open,
1101 .ndo_stop = usbnet_stop,
1102 .ndo_start_xmit = usbnet_start_xmit,
1103 .ndo_tx_timeout = usbnet_tx_timeout,
1104 .ndo_change_mtu = usbnet_change_mtu,
1105 .ndo_set_mac_address = eth_mac_addr,
1106 .ndo_validate_addr = eth_validate_addr,
1107 .ndo_do_ioctl = smsc95xx_ioctl,
1108 .ndo_set_rx_mode = smsc95xx_set_multicast,
1109 .ndo_set_features = smsc95xx_set_features,
1110};
1111
1112static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1113{
1114 struct smsc95xx_priv *pdata = NULL;
1115 u32 val;
1116 int ret;
1117
1118 printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1119
1120 ret = usbnet_get_endpoints(dev, intf);
1121 if (ret < 0) {
1122 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1123 return ret;
1124 }
1125
1126 dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1127 GFP_KERNEL);
1128
1129 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1130 if (!pdata)
1131 return -ENOMEM;
1132
1133 spin_lock_init(&pdata->mac_cr_lock);
1134
1135 if (DEFAULT_TX_CSUM_ENABLE)
1136 dev->net->features |= NETIF_F_HW_CSUM;
1137 if (DEFAULT_RX_CSUM_ENABLE)
1138 dev->net->features |= NETIF_F_RXCSUM;
1139
1140 dev->net->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
1141
1142 smsc95xx_init_mac_address(dev);
1143
1144 /* Init all registers */
1145 ret = smsc95xx_reset(dev);
1146
1147 /* detect device revision as different features may be available */
1148 ret = smsc95xx_read_reg(dev, ID_REV, &val);
1149 if (ret < 0)
1150 return ret;
1151 val >>= 16;
1152
1153 if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1154 (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1155 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1156 FEATURE_PHY_NLP_CROSSOVER |
1157 FEATURE_REMOTE_WAKEUP);
1158 else if (val == ID_REV_CHIP_ID_9512_)
1159 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1160
1161 dev->net->netdev_ops = &smsc95xx_netdev_ops;
1162 dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1163 dev->net->flags |= IFF_MULTICAST;
1164 dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1165 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1166 return 0;
1167}
1168
1169static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1170{
1171 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1172 if (pdata) {
1173 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1174 kfree(pdata);
1175 pdata = NULL;
1176 dev->data[0] = 0;
1177 }
1178}
1179
1180static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1181{
1182 u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1183 return crc << ((filter % 2) * 16);
1184}
1185
1186static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1187{
1188 struct mii_if_info *mii = &dev->mii;
1189 int ret;
1190
1191 netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1192
1193 /* read to clear */
1194 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1195 if (ret < 0)
1196 return ret;
1197
1198 /* enable interrupt source */
1199 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1200 if (ret < 0)
1201 return ret;
1202
1203 ret |= mask;
1204
1205 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1206
1207 return 0;
1208}
1209
1210static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1211{
1212 struct mii_if_info *mii = &dev->mii;
1213 int ret;
1214
1215 /* first, a dummy read, needed to latch some MII phys */
1216 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1217 if (ret < 0)
1218 return ret;
1219
1220 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1221 if (ret < 0)
1222 return ret;
1223
1224 return !!(ret & BMSR_LSTATUS);
1225}
1226
1227static int smsc95xx_enter_suspend0(struct usbnet *dev)
1228{
1229 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1230 u32 val;
1231 int ret;
1232
1233 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1234 if (ret < 0)
1235 return ret;
1236
1237 val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1238 val |= PM_CTL_SUS_MODE_0;
1239
1240 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1241 if (ret < 0)
1242 return ret;
1243
1244 /* clear wol status */
1245 val &= ~PM_CTL_WUPS_;
1246 val |= PM_CTL_WUPS_WOL_;
1247
1248 /* enable energy detection */
1249 if (pdata->wolopts & WAKE_PHY)
1250 val |= PM_CTL_WUPS_ED_;
1251
1252 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1253 if (ret < 0)
1254 return ret;
1255
1256 /* read back PM_CTRL */
1257 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1258 if (ret < 0)
1259 return ret;
1260
1261 pdata->suspend_flags |= SUSPEND_SUSPEND0;
1262
1263 return 0;
1264}
1265
1266static int smsc95xx_enter_suspend1(struct usbnet *dev)
1267{
1268 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1269 struct mii_if_info *mii = &dev->mii;
1270 u32 val;
1271 int ret;
1272
1273 /* reconfigure link pulse detection timing for
1274 * compatibility with non-standard link partners
1275 */
1276 if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1277 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1278 PHY_EDPD_CONFIG_DEFAULT);
1279
1280 /* enable energy detect power-down mode */
1281 ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1282 if (ret < 0)
1283 return ret;
1284
1285 ret |= MODE_CTRL_STS_EDPWRDOWN_;
1286
1287 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1288
1289 /* enter SUSPEND1 mode */
1290 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1291 if (ret < 0)
1292 return ret;
1293
1294 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1295 val |= PM_CTL_SUS_MODE_1;
1296
1297 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1298 if (ret < 0)
1299 return ret;
1300
1301 /* clear wol status, enable energy detection */
1302 val &= ~PM_CTL_WUPS_;
1303 val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1304
1305 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1306 if (ret < 0)
1307 return ret;
1308
1309 pdata->suspend_flags |= SUSPEND_SUSPEND1;
1310
1311 return 0;
1312}
1313
1314static int smsc95xx_enter_suspend2(struct usbnet *dev)
1315{
1316 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1317 u32 val;
1318 int ret;
1319
1320 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1321 if (ret < 0)
1322 return ret;
1323
1324 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1325 val |= PM_CTL_SUS_MODE_2;
1326
1327 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1328 if (ret < 0)
1329 return ret;
1330
1331 pdata->suspend_flags |= SUSPEND_SUSPEND2;
1332
1333 return 0;
1334}
1335
1336static int smsc95xx_enter_suspend3(struct usbnet *dev)
1337{
1338 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1339 u32 val;
1340 int ret;
1341
1342 ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1343 if (ret < 0)
1344 return ret;
1345
1346 if (val & 0xFFFF) {
1347 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1348 return -EBUSY;
1349 }
1350
1351 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1352 if (ret < 0)
1353 return ret;
1354
1355 val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1356 val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1357
1358 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1359 if (ret < 0)
1360 return ret;
1361
1362 /* clear wol status */
1363 val &= ~PM_CTL_WUPS_;
1364 val |= PM_CTL_WUPS_WOL_;
1365
1366 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1367 if (ret < 0)
1368 return ret;
1369
1370 pdata->suspend_flags |= SUSPEND_SUSPEND3;
1371
1372 return 0;
1373}
1374
1375static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1376{
1377 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1378 int ret;
1379
1380 if (!netif_running(dev->net)) {
1381 /* interface is ifconfig down so fully power down hw */
1382 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1383 return smsc95xx_enter_suspend2(dev);
1384 }
1385
1386 if (!link_up) {
1387 /* link is down so enter EDPD mode, but only if device can
1388 * reliably resume from it. This check should be redundant
1389 * as current FEATURE_REMOTE_WAKEUP parts also support
1390 * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1391 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1392 netdev_warn(dev->net, "EDPD not supported\n");
1393 return -EBUSY;
1394 }
1395
1396 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1397
1398 /* enable PHY wakeup events for if cable is attached */
1399 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1400 PHY_INT_MASK_ANEG_COMP_);
1401 if (ret < 0) {
1402 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1403 return ret;
1404 }
1405
1406 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1407 return smsc95xx_enter_suspend1(dev);
1408 }
1409
1410 /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1411 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1412 PHY_INT_MASK_LINK_DOWN_);
1413 if (ret < 0) {
1414 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1415 return ret;
1416 }
1417
1418 netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1419 return smsc95xx_enter_suspend3(dev);
1420}
1421
1422static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1423{
1424 struct usbnet *dev = usb_get_intfdata(intf);
1425 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1426 u32 val, link_up;
1427 int ret;
1428
1429 ret = usbnet_suspend(intf, message);
1430 if (ret < 0) {
1431 netdev_warn(dev->net, "usbnet_suspend error\n");
1432 return ret;
1433 }
1434
1435 if (pdata->suspend_flags) {
1436 netdev_warn(dev->net, "error during last resume\n");
1437 pdata->suspend_flags = 0;
1438 }
1439
1440 /* determine if link is up using only _nopm functions */
1441 link_up = smsc95xx_link_ok_nopm(dev);
1442
1443 if (message.event == PM_EVENT_AUTO_SUSPEND &&
1444 (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1445 ret = smsc95xx_autosuspend(dev, link_up);
1446 goto done;
1447 }
1448
1449 /* if we get this far we're not autosuspending */
1450 /* if no wol options set, or if link is down and we're not waking on
1451 * PHY activity, enter lowest power SUSPEND2 mode
1452 */
1453 if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1454 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1455 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1456
1457 /* disable energy detect (link up) & wake up events */
1458 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1459 if (ret < 0)
1460 goto done;
1461
1462 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1463
1464 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1465 if (ret < 0)
1466 goto done;
1467
1468 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1469 if (ret < 0)
1470 goto done;
1471
1472 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1473
1474 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1475 if (ret < 0)
1476 goto done;
1477
1478 ret = smsc95xx_enter_suspend2(dev);
1479 goto done;
1480 }
1481
1482 if (pdata->wolopts & WAKE_PHY) {
1483 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1484 (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1485 if (ret < 0) {
1486 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1487 goto done;
1488 }
1489
1490 /* if link is down then configure EDPD and enter SUSPEND1,
1491 * otherwise enter SUSPEND0 below
1492 */
1493 if (!link_up) {
1494 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1495 ret = smsc95xx_enter_suspend1(dev);
1496 goto done;
1497 }
1498 }
1499
1500 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1501 u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL);
1502 u32 command[2];
1503 u32 offset[2];
1504 u32 crc[4];
1505 int wuff_filter_count =
1506 (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1507 LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1508 int i, filter = 0;
1509
1510 if (!filter_mask) {
1511 netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1512 ret = -ENOMEM;
1513 goto done;
1514 }
1515
1516 memset(command, 0, sizeof(command));
1517 memset(offset, 0, sizeof(offset));
1518 memset(crc, 0, sizeof(crc));
1519
1520 if (pdata->wolopts & WAKE_BCAST) {
1521 const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1522 netdev_info(dev->net, "enabling broadcast detection\n");
1523 filter_mask[filter * 4] = 0x003F;
1524 filter_mask[filter * 4 + 1] = 0x00;
1525 filter_mask[filter * 4 + 2] = 0x00;
1526 filter_mask[filter * 4 + 3] = 0x00;
1527 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1528 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1529 crc[filter/2] |= smsc_crc(bcast, 6, filter);
1530 filter++;
1531 }
1532
1533 if (pdata->wolopts & WAKE_MCAST) {
1534 const u8 mcast[] = {0x01, 0x00, 0x5E};
1535 netdev_info(dev->net, "enabling multicast detection\n");
1536 filter_mask[filter * 4] = 0x0007;
1537 filter_mask[filter * 4 + 1] = 0x00;
1538 filter_mask[filter * 4 + 2] = 0x00;
1539 filter_mask[filter * 4 + 3] = 0x00;
1540 command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1541 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1542 crc[filter/2] |= smsc_crc(mcast, 3, filter);
1543 filter++;
1544 }
1545
1546 if (pdata->wolopts & WAKE_ARP) {
1547 const u8 arp[] = {0x08, 0x06};
1548 netdev_info(dev->net, "enabling ARP detection\n");
1549 filter_mask[filter * 4] = 0x0003;
1550 filter_mask[filter * 4 + 1] = 0x00;
1551 filter_mask[filter * 4 + 2] = 0x00;
1552 filter_mask[filter * 4 + 3] = 0x00;
1553 command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1554 offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1555 crc[filter/2] |= smsc_crc(arp, 2, filter);
1556 filter++;
1557 }
1558
1559 if (pdata->wolopts & WAKE_UCAST) {
1560 netdev_info(dev->net, "enabling unicast detection\n");
1561 filter_mask[filter * 4] = 0x003F;
1562 filter_mask[filter * 4 + 1] = 0x00;
1563 filter_mask[filter * 4 + 2] = 0x00;
1564 filter_mask[filter * 4 + 3] = 0x00;
1565 command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1566 offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1567 crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1568 filter++;
1569 }
1570
1571 for (i = 0; i < (wuff_filter_count * 4); i++) {
1572 ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1573 if (ret < 0) {
1574 kfree(filter_mask);
1575 goto done;
1576 }
1577 }
1578 kfree(filter_mask);
1579
1580 for (i = 0; i < (wuff_filter_count / 4); i++) {
1581 ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1582 if (ret < 0)
1583 goto done;
1584 }
1585
1586 for (i = 0; i < (wuff_filter_count / 4); i++) {
1587 ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1588 if (ret < 0)
1589 goto done;
1590 }
1591
1592 for (i = 0; i < (wuff_filter_count / 2); i++) {
1593 ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1594 if (ret < 0)
1595 goto done;
1596 }
1597
1598 /* clear any pending pattern match packet status */
1599 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1600 if (ret < 0)
1601 goto done;
1602
1603 val |= WUCSR_WUFR_;
1604
1605 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1606 if (ret < 0)
1607 goto done;
1608 }
1609
1610 if (pdata->wolopts & WAKE_MAGIC) {
1611 /* clear any pending magic packet status */
1612 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1613 if (ret < 0)
1614 goto done;
1615
1616 val |= WUCSR_MPR_;
1617
1618 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1619 if (ret < 0)
1620 goto done;
1621 }
1622
1623 /* enable/disable wakeup sources */
1624 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1625 if (ret < 0)
1626 goto done;
1627
1628 if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1629 netdev_info(dev->net, "enabling pattern match wakeup\n");
1630 val |= WUCSR_WAKE_EN_;
1631 } else {
1632 netdev_info(dev->net, "disabling pattern match wakeup\n");
1633 val &= ~WUCSR_WAKE_EN_;
1634 }
1635
1636 if (pdata->wolopts & WAKE_MAGIC) {
1637 netdev_info(dev->net, "enabling magic packet wakeup\n");
1638 val |= WUCSR_MPEN_;
1639 } else {
1640 netdev_info(dev->net, "disabling magic packet wakeup\n");
1641 val &= ~WUCSR_MPEN_;
1642 }
1643
1644 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1645 if (ret < 0)
1646 goto done;
1647
1648 /* enable wol wakeup source */
1649 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1650 if (ret < 0)
1651 goto done;
1652
1653 val |= PM_CTL_WOL_EN_;
1654
1655 /* phy energy detect wakeup source */
1656 if (pdata->wolopts & WAKE_PHY)
1657 val |= PM_CTL_ED_EN_;
1658
1659 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1660 if (ret < 0)
1661 goto done;
1662
1663 /* enable receiver to enable frame reception */
1664 smsc95xx_start_rx_path(dev, 1);
1665
1666 /* some wol options are enabled, so enter SUSPEND0 */
1667 netdev_info(dev->net, "entering SUSPEND0 mode\n");
1668 ret = smsc95xx_enter_suspend0(dev);
1669
1670done:
1671 /*
1672 * TODO: resume() might need to handle the suspend failure
1673 * in system sleep
1674 */
1675 if (ret && PMSG_IS_AUTO(message))
1676 usbnet_resume(intf);
1677 return ret;
1678}
1679
1680static int smsc95xx_resume(struct usb_interface *intf)
1681{
1682 struct usbnet *dev = usb_get_intfdata(intf);
1683 struct smsc95xx_priv *pdata;
1684 u8 suspend_flags;
1685 int ret;
1686 u32 val;
1687
1688 BUG_ON(!dev);
1689 pdata = (struct smsc95xx_priv *)(dev->data[0]);
1690 suspend_flags = pdata->suspend_flags;
1691
1692 netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1693
1694 /* do this first to ensure it's cleared even in error case */
1695 pdata->suspend_flags = 0;
1696
1697 if (suspend_flags & SUSPEND_ALLMODES) {
1698 /* clear wake-up sources */
1699 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1700 if (ret < 0)
1701 return ret;
1702
1703 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1704
1705 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1706 if (ret < 0)
1707 return ret;
1708
1709 /* clear wake-up status */
1710 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1711 if (ret < 0)
1712 return ret;
1713
1714 val &= ~PM_CTL_WOL_EN_;
1715 val |= PM_CTL_WUPS_;
1716
1717 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1718 if (ret < 0)
1719 return ret;
1720 }
1721
1722 ret = usbnet_resume(intf);
1723 if (ret < 0)
1724 netdev_warn(dev->net, "usbnet_resume error\n");
1725
1726 return ret;
1727}
1728
1729static int smsc95xx_reset_resume(struct usb_interface *intf)
1730{
1731 struct usbnet *dev = usb_get_intfdata(intf);
1732 int ret;
1733
1734 ret = smsc95xx_reset(dev);
1735 if (ret < 0)
1736 return ret;
1737
1738 return smsc95xx_resume(intf);
1739}
1740
1741static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1742{
1743 skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1744 skb->ip_summed = CHECKSUM_COMPLETE;
1745 skb_trim(skb, skb->len - 2);
1746}
1747
1748static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1749{
1750 /* This check is no longer done by usbnet */
1751 if (skb->len < dev->net->hard_header_len)
1752 return 0;
1753
1754 while (skb->len > 0) {
1755 u32 header, align_count;
1756 struct sk_buff *ax_skb;
1757 unsigned char *packet;
1758 u16 size;
1759
1760 memcpy(&header, skb->data, sizeof(header));
1761 le32_to_cpus(&header);
1762 skb_pull(skb, 4 + NET_IP_ALIGN);
1763 packet = skb->data;
1764
1765 /* get the packet length */
1766 size = (u16)((header & RX_STS_FL_) >> 16);
1767 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1768
1769 if (unlikely(header & RX_STS_ES_)) {
1770 netif_dbg(dev, rx_err, dev->net,
1771 "Error header=0x%08x\n", header);
1772 dev->net->stats.rx_errors++;
1773 dev->net->stats.rx_dropped++;
1774
1775 if (header & RX_STS_CRC_) {
1776 dev->net->stats.rx_crc_errors++;
1777 } else {
1778 if (header & (RX_STS_TL_ | RX_STS_RF_))
1779 dev->net->stats.rx_frame_errors++;
1780
1781 if ((header & RX_STS_LE_) &&
1782 (!(header & RX_STS_FT_)))
1783 dev->net->stats.rx_length_errors++;
1784 }
1785 } else {
1786 /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1787 if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1788 netif_dbg(dev, rx_err, dev->net,
1789 "size err header=0x%08x\n", header);
1790 return 0;
1791 }
1792
1793 /* last frame in this batch */
1794 if (skb->len == size) {
1795 if (dev->net->features & NETIF_F_RXCSUM)
1796 smsc95xx_rx_csum_offload(skb);
1797 skb_trim(skb, skb->len - 4); /* remove fcs */
1798 skb->truesize = size + sizeof(struct sk_buff);
1799
1800 return 1;
1801 }
1802
1803 ax_skb = skb_clone(skb, GFP_ATOMIC);
1804 if (unlikely(!ax_skb)) {
1805 netdev_warn(dev->net, "Error allocating skb\n");
1806 return 0;
1807 }
1808
1809 ax_skb->len = size;
1810 ax_skb->data = packet;
1811 skb_set_tail_pointer(ax_skb, size);
1812
1813 if (dev->net->features & NETIF_F_RXCSUM)
1814 smsc95xx_rx_csum_offload(ax_skb);
1815 skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1816 ax_skb->truesize = size + sizeof(struct sk_buff);
1817
1818 usbnet_skb_return(dev, ax_skb);
1819 }
1820
1821 skb_pull(skb, size);
1822
1823 /* padding bytes before the next frame starts */
1824 if (skb->len)
1825 skb_pull(skb, align_count);
1826 }
1827
1828 return 1;
1829}
1830
1831static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1832{
1833 u16 low_16 = (u16)skb_checksum_start_offset(skb);
1834 u16 high_16 = low_16 + skb->csum_offset;
1835 return (high_16 << 16) | low_16;
1836}
1837
1838static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1839 struct sk_buff *skb, gfp_t flags)
1840{
1841 bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
1842 int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1843 u32 tx_cmd_a, tx_cmd_b;
1844
1845 /* We do not advertise SG, so skbs should be already linearized */
1846 BUG_ON(skb_shinfo(skb)->nr_frags);
1847
1848 if (skb_headroom(skb) < overhead) {
1849 struct sk_buff *skb2 = skb_copy_expand(skb,
1850 overhead, 0, flags);
1851 dev_kfree_skb_any(skb);
1852 skb = skb2;
1853 if (!skb)
1854 return NULL;
1855 }
1856
1857 if (csum) {
1858 if (skb->len <= 45) {
1859 /* workaround - hardware tx checksum does not work
1860 * properly with extremely small packets */
1861 long csstart = skb_checksum_start_offset(skb);
1862 __wsum calc = csum_partial(skb->data + csstart,
1863 skb->len - csstart, 0);
1864 *((__sum16 *)(skb->data + csstart
1865 + skb->csum_offset)) = csum_fold(calc);
1866
1867 csum = false;
1868 } else {
1869 u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1870 skb_push(skb, 4);
1871 cpu_to_le32s(&csum_preamble);
1872 memcpy(skb->data, &csum_preamble, 4);
1873 }
1874 }
1875
1876 skb_push(skb, 4);
1877 tx_cmd_b = (u32)(skb->len - 4);
1878 if (csum)
1879 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1880 cpu_to_le32s(&tx_cmd_b);
1881 memcpy(skb->data, &tx_cmd_b, 4);
1882
1883 skb_push(skb, 4);
1884 tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1885 TX_CMD_A_LAST_SEG_;
1886 cpu_to_le32s(&tx_cmd_a);
1887 memcpy(skb->data, &tx_cmd_a, 4);
1888
1889 return skb;
1890}
1891
1892static int smsc95xx_manage_power(struct usbnet *dev, int on)
1893{
1894 struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1895
1896 dev->intf->needs_remote_wakeup = on;
1897
1898 if (pdata->features & FEATURE_REMOTE_WAKEUP)
1899 return 0;
1900
1901 /* this chip revision isn't capable of remote wakeup */
1902 netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
1903
1904 if (on)
1905 usb_autopm_get_interface_no_resume(dev->intf);
1906 else
1907 usb_autopm_put_interface(dev->intf);
1908
1909 return 0;
1910}
1911
1912static const struct driver_info smsc95xx_info = {
1913 .description = "smsc95xx USB 2.0 Ethernet",
1914 .bind = smsc95xx_bind,
1915 .unbind = smsc95xx_unbind,
1916 .link_reset = smsc95xx_link_reset,
1917 .reset = smsc95xx_reset,
1918 .rx_fixup = smsc95xx_rx_fixup,
1919 .tx_fixup = smsc95xx_tx_fixup,
1920 .status = smsc95xx_status,
1921 .manage_power = smsc95xx_manage_power,
1922 .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1923};
1924
1925static const struct usb_device_id products[] = {
1926 {
1927 /* SMSC9500 USB Ethernet Device */
1928 USB_DEVICE(0x0424, 0x9500),
1929 .driver_info = (unsigned long) &smsc95xx_info,
1930 },
1931 {
1932 /* SMSC9505 USB Ethernet Device */
1933 USB_DEVICE(0x0424, 0x9505),
1934 .driver_info = (unsigned long) &smsc95xx_info,
1935 },
1936 {
1937 /* SMSC9500A USB Ethernet Device */
1938 USB_DEVICE(0x0424, 0x9E00),
1939 .driver_info = (unsigned long) &smsc95xx_info,
1940 },
1941 {
1942 /* SMSC9505A USB Ethernet Device */
1943 USB_DEVICE(0x0424, 0x9E01),
1944 .driver_info = (unsigned long) &smsc95xx_info,
1945 },
1946 {
1947 /* SMSC9512/9514 USB Hub & Ethernet Device */
1948 USB_DEVICE(0x0424, 0xec00),
1949 .driver_info = (unsigned long) &smsc95xx_info,
1950 },
1951 {
1952 /* SMSC9500 USB Ethernet Device (SAL10) */
1953 USB_DEVICE(0x0424, 0x9900),
1954 .driver_info = (unsigned long) &smsc95xx_info,
1955 },
1956 {
1957 /* SMSC9505 USB Ethernet Device (SAL10) */
1958 USB_DEVICE(0x0424, 0x9901),
1959 .driver_info = (unsigned long) &smsc95xx_info,
1960 },
1961 {
1962 /* SMSC9500A USB Ethernet Device (SAL10) */
1963 USB_DEVICE(0x0424, 0x9902),
1964 .driver_info = (unsigned long) &smsc95xx_info,
1965 },
1966 {
1967 /* SMSC9505A USB Ethernet Device (SAL10) */
1968 USB_DEVICE(0x0424, 0x9903),
1969 .driver_info = (unsigned long) &smsc95xx_info,
1970 },
1971 {
1972 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1973 USB_DEVICE(0x0424, 0x9904),
1974 .driver_info = (unsigned long) &smsc95xx_info,
1975 },
1976 {
1977 /* SMSC9500A USB Ethernet Device (HAL) */
1978 USB_DEVICE(0x0424, 0x9905),
1979 .driver_info = (unsigned long) &smsc95xx_info,
1980 },
1981 {
1982 /* SMSC9505A USB Ethernet Device (HAL) */
1983 USB_DEVICE(0x0424, 0x9906),
1984 .driver_info = (unsigned long) &smsc95xx_info,
1985 },
1986 {
1987 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1988 USB_DEVICE(0x0424, 0x9907),
1989 .driver_info = (unsigned long) &smsc95xx_info,
1990 },
1991 {
1992 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1993 USB_DEVICE(0x0424, 0x9908),
1994 .driver_info = (unsigned long) &smsc95xx_info,
1995 },
1996 {
1997 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1998 USB_DEVICE(0x0424, 0x9909),
1999 .driver_info = (unsigned long) &smsc95xx_info,
2000 },
2001 {
2002 /* SMSC LAN9530 USB Ethernet Device */
2003 USB_DEVICE(0x0424, 0x9530),
2004 .driver_info = (unsigned long) &smsc95xx_info,
2005 },
2006 {
2007 /* SMSC LAN9730 USB Ethernet Device */
2008 USB_DEVICE(0x0424, 0x9730),
2009 .driver_info = (unsigned long) &smsc95xx_info,
2010 },
2011 {
2012 /* SMSC LAN89530 USB Ethernet Device */
2013 USB_DEVICE(0x0424, 0x9E08),
2014 .driver_info = (unsigned long) &smsc95xx_info,
2015 },
2016 { }, /* END */
2017};
2018MODULE_DEVICE_TABLE(usb, products);
2019
2020static struct usb_driver smsc95xx_driver = {
2021 .name = "smsc95xx",
2022 .id_table = products,
2023 .probe = usbnet_probe,
2024 .suspend = smsc95xx_suspend,
2025 .resume = smsc95xx_resume,
2026 .reset_resume = smsc95xx_reset_resume,
2027 .disconnect = usbnet_disconnect,
2028 .disable_hub_initiated_lpm = 1,
2029 .supports_autosuspend = 1,
2030};
2031
2032module_usb_driver(smsc95xx_driver);
2033
2034MODULE_AUTHOR("Nancy Lin");
2035MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2036MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2037MODULE_LICENSE("GPL");