Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...
[linux-2.6.git] / drivers / net / usb / smsc95xx.c
1  /***************************************************************************
2  *
3  * Copyright (C) 2007-2008 SMSC
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
7  * as published by the Free Software Foundation; either version 2
8  * of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18  *
19  *****************************************************************************/
20
21 #include <linux/module.h>
22 #include <linux/kmod.h>
23 #include <linux/init.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/mii.h>
28 #include <linux/usb.h>
29 #include <linux/crc32.h>
30 #include <linux/usb/usbnet.h>
31 #include "smsc95xx.h"
32
33 #define SMSC_CHIPNAME                   "smsc95xx"
34 #define SMSC_DRIVER_VERSION             "1.0.4"
35 #define HS_USB_PKT_SIZE                 (512)
36 #define FS_USB_PKT_SIZE                 (64)
37 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
38 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
39 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
40 #define MAX_SINGLE_PACKET_SIZE          (2048)
41 #define LAN95XX_EEPROM_MAGIC            (0x9500)
42 #define EEPROM_MAC_OFFSET               (0x01)
43 #define DEFAULT_TX_CSUM_ENABLE          (true)
44 #define DEFAULT_RX_CSUM_ENABLE          (true)
45 #define SMSC95XX_INTERNAL_PHY_ID        (1)
46 #define SMSC95XX_TX_OVERHEAD            (8)
47 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
48
49 struct smsc95xx_priv {
50         u32 mac_cr;
51         spinlock_t mac_cr_lock;
52         bool use_tx_csum;
53         bool use_rx_csum;
54 };
55
56 struct usb_context {
57         struct usb_ctrlrequest req;
58         struct usbnet *dev;
59 };
60
61 static int turbo_mode = true;
62 module_param(turbo_mode, bool, 0644);
63 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
64
65 static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data)
66 {
67         u32 *buf = kmalloc(4, GFP_KERNEL);
68         int ret;
69
70         BUG_ON(!dev);
71
72         if (!buf)
73                 return -ENOMEM;
74
75         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
76                 USB_VENDOR_REQUEST_READ_REGISTER,
77                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
78                 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
79
80         if (unlikely(ret < 0))
81                 netdev_warn(dev->net, "Failed to read register index 0x%08x\n", index);
82
83         le32_to_cpus(buf);
84         *data = *buf;
85         kfree(buf);
86
87         return ret;
88 }
89
90 static int smsc95xx_write_reg(struct usbnet *dev, u32 index, u32 data)
91 {
92         u32 *buf = kmalloc(4, GFP_KERNEL);
93         int ret;
94
95         BUG_ON(!dev);
96
97         if (!buf)
98                 return -ENOMEM;
99
100         *buf = data;
101         cpu_to_le32s(buf);
102
103         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
104                 USB_VENDOR_REQUEST_WRITE_REGISTER,
105                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
106                 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
107
108         if (unlikely(ret < 0))
109                 netdev_warn(dev->net, "Failed to write register index 0x%08x\n", index);
110
111         kfree(buf);
112
113         return ret;
114 }
115
116 /* Loop until the read is completed with timeout
117  * called with phy_mutex held */
118 static int smsc95xx_phy_wait_not_busy(struct usbnet *dev)
119 {
120         unsigned long start_time = jiffies;
121         u32 val;
122
123         do {
124                 smsc95xx_read_reg(dev, MII_ADDR, &val);
125                 if (!(val & MII_BUSY_))
126                         return 0;
127         } while (!time_after(jiffies, start_time + HZ));
128
129         return -EIO;
130 }
131
132 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
133 {
134         struct usbnet *dev = netdev_priv(netdev);
135         u32 val, addr;
136
137         mutex_lock(&dev->phy_mutex);
138
139         /* confirm MII not busy */
140         if (smsc95xx_phy_wait_not_busy(dev)) {
141                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
142                 mutex_unlock(&dev->phy_mutex);
143                 return -EIO;
144         }
145
146         /* set the address, index & direction (read from PHY) */
147         phy_id &= dev->mii.phy_id_mask;
148         idx &= dev->mii.reg_num_mask;
149         addr = (phy_id << 11) | (idx << 6) | MII_READ_;
150         smsc95xx_write_reg(dev, MII_ADDR, addr);
151
152         if (smsc95xx_phy_wait_not_busy(dev)) {
153                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
154                 mutex_unlock(&dev->phy_mutex);
155                 return -EIO;
156         }
157
158         smsc95xx_read_reg(dev, MII_DATA, &val);
159
160         mutex_unlock(&dev->phy_mutex);
161
162         return (u16)(val & 0xFFFF);
163 }
164
165 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
166                                 int regval)
167 {
168         struct usbnet *dev = netdev_priv(netdev);
169         u32 val, addr;
170
171         mutex_lock(&dev->phy_mutex);
172
173         /* confirm MII not busy */
174         if (smsc95xx_phy_wait_not_busy(dev)) {
175                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
176                 mutex_unlock(&dev->phy_mutex);
177                 return;
178         }
179
180         val = regval;
181         smsc95xx_write_reg(dev, MII_DATA, val);
182
183         /* set the address, index & direction (write to PHY) */
184         phy_id &= dev->mii.phy_id_mask;
185         idx &= dev->mii.reg_num_mask;
186         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
187         smsc95xx_write_reg(dev, MII_ADDR, addr);
188
189         if (smsc95xx_phy_wait_not_busy(dev))
190                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
191
192         mutex_unlock(&dev->phy_mutex);
193 }
194
195 static int smsc95xx_wait_eeprom(struct usbnet *dev)
196 {
197         unsigned long start_time = jiffies;
198         u32 val;
199
200         do {
201                 smsc95xx_read_reg(dev, E2P_CMD, &val);
202                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
203                         break;
204                 udelay(40);
205         } while (!time_after(jiffies, start_time + HZ));
206
207         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
208                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
209                 return -EIO;
210         }
211
212         return 0;
213 }
214
215 static int smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
216 {
217         unsigned long start_time = jiffies;
218         u32 val;
219
220         do {
221                 smsc95xx_read_reg(dev, E2P_CMD, &val);
222
223                 if (!(val & E2P_CMD_BUSY_))
224                         return 0;
225
226                 udelay(40);
227         } while (!time_after(jiffies, start_time + HZ));
228
229         netdev_warn(dev->net, "EEPROM is busy\n");
230         return -EIO;
231 }
232
233 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
234                                 u8 *data)
235 {
236         u32 val;
237         int i, ret;
238
239         BUG_ON(!dev);
240         BUG_ON(!data);
241
242         ret = smsc95xx_eeprom_confirm_not_busy(dev);
243         if (ret)
244                 return ret;
245
246         for (i = 0; i < length; i++) {
247                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
248                 smsc95xx_write_reg(dev, E2P_CMD, val);
249
250                 ret = smsc95xx_wait_eeprom(dev);
251                 if (ret < 0)
252                         return ret;
253
254                 smsc95xx_read_reg(dev, E2P_DATA, &val);
255
256                 data[i] = val & 0xFF;
257                 offset++;
258         }
259
260         return 0;
261 }
262
263 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
264                                  u8 *data)
265 {
266         u32 val;
267         int i, ret;
268
269         BUG_ON(!dev);
270         BUG_ON(!data);
271
272         ret = smsc95xx_eeprom_confirm_not_busy(dev);
273         if (ret)
274                 return ret;
275
276         /* Issue write/erase enable command */
277         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
278         smsc95xx_write_reg(dev, E2P_CMD, val);
279
280         ret = smsc95xx_wait_eeprom(dev);
281         if (ret < 0)
282                 return ret;
283
284         for (i = 0; i < length; i++) {
285
286                 /* Fill data register */
287                 val = data[i];
288                 smsc95xx_write_reg(dev, E2P_DATA, val);
289
290                 /* Send "write" command */
291                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
292                 smsc95xx_write_reg(dev, E2P_CMD, val);
293
294                 ret = smsc95xx_wait_eeprom(dev);
295                 if (ret < 0)
296                         return ret;
297
298                 offset++;
299         }
300
301         return 0;
302 }
303
304 static void smsc95xx_async_cmd_callback(struct urb *urb)
305 {
306         struct usb_context *usb_context = urb->context;
307         struct usbnet *dev = usb_context->dev;
308         int status = urb->status;
309
310         if (status < 0)
311                 netdev_warn(dev->net, "async callback failed with %d\n", status);
312
313         kfree(usb_context);
314         usb_free_urb(urb);
315 }
316
317 static int smsc95xx_write_reg_async(struct usbnet *dev, u16 index, u32 *data)
318 {
319         struct usb_context *usb_context;
320         int status;
321         struct urb *urb;
322         const u16 size = 4;
323
324         urb = usb_alloc_urb(0, GFP_ATOMIC);
325         if (!urb) {
326                 netdev_warn(dev->net, "Error allocating URB\n");
327                 return -ENOMEM;
328         }
329
330         usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC);
331         if (usb_context == NULL) {
332                 netdev_warn(dev->net, "Error allocating control msg\n");
333                 usb_free_urb(urb);
334                 return -ENOMEM;
335         }
336
337         usb_context->req.bRequestType =
338                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
339         usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER;
340         usb_context->req.wValue = 00;
341         usb_context->req.wIndex = cpu_to_le16(index);
342         usb_context->req.wLength = cpu_to_le16(size);
343
344         usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
345                 (void *)&usb_context->req, data, size,
346                 smsc95xx_async_cmd_callback,
347                 (void *)usb_context);
348
349         status = usb_submit_urb(urb, GFP_ATOMIC);
350         if (status < 0) {
351                 netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
352                             status);
353                 kfree(usb_context);
354                 usb_free_urb(urb);
355         }
356
357         return status;
358 }
359
360 /* returns hash bit number for given MAC address
361  * example:
362  * 01 00 5E 00 00 01 -> returns bit number 31 */
363 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
364 {
365         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
366 }
367
368 static void smsc95xx_set_multicast(struct net_device *netdev)
369 {
370         struct usbnet *dev = netdev_priv(netdev);
371         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
372         u32 hash_hi = 0;
373         u32 hash_lo = 0;
374         unsigned long flags;
375
376         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
377
378         if (dev->net->flags & IFF_PROMISC) {
379                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
380                 pdata->mac_cr |= MAC_CR_PRMS_;
381                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
382         } else if (dev->net->flags & IFF_ALLMULTI) {
383                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
384                 pdata->mac_cr |= MAC_CR_MCPAS_;
385                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
386         } else if (!netdev_mc_empty(dev->net)) {
387                 struct dev_mc_list *mc_list;
388
389                 pdata->mac_cr |= MAC_CR_HPFILT_;
390                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
391
392                 netdev_for_each_mc_addr(mc_list, netdev) {
393                         u32 bitnum = smsc95xx_hash(mc_list->dmi_addr);
394                         u32 mask = 0x01 << (bitnum & 0x1F);
395                         if (bitnum & 0x20)
396                                 hash_hi |= mask;
397                         else
398                                 hash_lo |= mask;
399                 }
400
401                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
402                                    hash_hi, hash_lo);
403         } else {
404                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
405                 pdata->mac_cr &=
406                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
407         }
408
409         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
410
411         /* Initiate async writes, as we can't wait for completion here */
412         smsc95xx_write_reg_async(dev, HASHH, &hash_hi);
413         smsc95xx_write_reg_async(dev, HASHL, &hash_lo);
414         smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr);
415 }
416
417 static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
418                                             u16 lcladv, u16 rmtadv)
419 {
420         u32 flow, afc_cfg = 0;
421
422         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
423         if (ret < 0) {
424                 netdev_warn(dev->net, "error reading AFC_CFG\n");
425                 return;
426         }
427
428         if (duplex == DUPLEX_FULL) {
429                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
430
431                 if (cap & FLOW_CTRL_RX)
432                         flow = 0xFFFF0002;
433                 else
434                         flow = 0;
435
436                 if (cap & FLOW_CTRL_TX)
437                         afc_cfg |= 0xF;
438                 else
439                         afc_cfg &= ~0xF;
440
441                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
442                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
443                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
444         } else {
445                 netif_dbg(dev, link, dev->net, "half duplex\n");
446                 flow = 0;
447                 afc_cfg |= 0xF;
448         }
449
450         smsc95xx_write_reg(dev, FLOW, flow);
451         smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
452 }
453
454 static int smsc95xx_link_reset(struct usbnet *dev)
455 {
456         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
457         struct mii_if_info *mii = &dev->mii;
458         struct ethtool_cmd ecmd;
459         unsigned long flags;
460         u16 lcladv, rmtadv;
461         u32 intdata;
462
463         /* clear interrupt status */
464         smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
465         intdata = 0xFFFFFFFF;
466         smsc95xx_write_reg(dev, INT_STS, intdata);
467
468         mii_check_media(mii, 1, 1);
469         mii_ethtool_gset(&dev->mii, &ecmd);
470         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
471         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
472
473         netif_dbg(dev, link, dev->net, "speed: %d duplex: %d lcladv: %04x rmtadv: %04x\n",
474                   ecmd.speed, ecmd.duplex, lcladv, rmtadv);
475
476         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
477         if (ecmd.duplex != DUPLEX_FULL) {
478                 pdata->mac_cr &= ~MAC_CR_FDPX_;
479                 pdata->mac_cr |= MAC_CR_RCVOWN_;
480         } else {
481                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
482                 pdata->mac_cr |= MAC_CR_FDPX_;
483         }
484         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
485
486         smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
487
488         smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
489
490         return 0;
491 }
492
493 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
494 {
495         u32 intdata;
496
497         if (urb->actual_length != 4) {
498                 netdev_warn(dev->net, "unexpected urb length %d\n",
499                             urb->actual_length);
500                 return;
501         }
502
503         memcpy(&intdata, urb->transfer_buffer, 4);
504         le32_to_cpus(&intdata);
505
506         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
507
508         if (intdata & INT_ENP_PHY_INT_)
509                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
510         else
511                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
512                             intdata);
513 }
514
515 /* Enable or disable Tx & Rx checksum offload engines */
516 static int smsc95xx_set_csums(struct usbnet *dev)
517 {
518         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
519         u32 read_buf;
520         int ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
521         if (ret < 0) {
522                 netdev_warn(dev->net, "Failed to read COE_CR: %d\n", ret);
523                 return ret;
524         }
525
526         if (pdata->use_tx_csum)
527                 read_buf |= Tx_COE_EN_;
528         else
529                 read_buf &= ~Tx_COE_EN_;
530
531         if (pdata->use_rx_csum)
532                 read_buf |= Rx_COE_EN_;
533         else
534                 read_buf &= ~Rx_COE_EN_;
535
536         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
537         if (ret < 0) {
538                 netdev_warn(dev->net, "Failed to write COE_CR: %d\n", ret);
539                 return ret;
540         }
541
542         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
543         return 0;
544 }
545
546 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
547 {
548         return MAX_EEPROM_SIZE;
549 }
550
551 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
552                                        struct ethtool_eeprom *ee, u8 *data)
553 {
554         struct usbnet *dev = netdev_priv(netdev);
555
556         ee->magic = LAN95XX_EEPROM_MAGIC;
557
558         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
559 }
560
561 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
562                                        struct ethtool_eeprom *ee, u8 *data)
563 {
564         struct usbnet *dev = netdev_priv(netdev);
565
566         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
567                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
568                             ee->magic);
569                 return -EINVAL;
570         }
571
572         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
573 }
574
575 static u32 smsc95xx_ethtool_get_rx_csum(struct net_device *netdev)
576 {
577         struct usbnet *dev = netdev_priv(netdev);
578         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
579
580         return pdata->use_rx_csum;
581 }
582
583 static int smsc95xx_ethtool_set_rx_csum(struct net_device *netdev, u32 val)
584 {
585         struct usbnet *dev = netdev_priv(netdev);
586         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
587
588         pdata->use_rx_csum = !!val;
589
590         return smsc95xx_set_csums(dev);
591 }
592
593 static u32 smsc95xx_ethtool_get_tx_csum(struct net_device *netdev)
594 {
595         struct usbnet *dev = netdev_priv(netdev);
596         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
597
598         return pdata->use_tx_csum;
599 }
600
601 static int smsc95xx_ethtool_set_tx_csum(struct net_device *netdev, u32 val)
602 {
603         struct usbnet *dev = netdev_priv(netdev);
604         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
605
606         pdata->use_tx_csum = !!val;
607
608         ethtool_op_set_tx_hw_csum(netdev, pdata->use_tx_csum);
609         return smsc95xx_set_csums(dev);
610 }
611
612 static const struct ethtool_ops smsc95xx_ethtool_ops = {
613         .get_link       = usbnet_get_link,
614         .nway_reset     = usbnet_nway_reset,
615         .get_drvinfo    = usbnet_get_drvinfo,
616         .get_msglevel   = usbnet_get_msglevel,
617         .set_msglevel   = usbnet_set_msglevel,
618         .get_settings   = usbnet_get_settings,
619         .set_settings   = usbnet_set_settings,
620         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
621         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
622         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
623         .get_tx_csum    = smsc95xx_ethtool_get_tx_csum,
624         .set_tx_csum    = smsc95xx_ethtool_set_tx_csum,
625         .get_rx_csum    = smsc95xx_ethtool_get_rx_csum,
626         .set_rx_csum    = smsc95xx_ethtool_set_rx_csum,
627 };
628
629 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
630 {
631         struct usbnet *dev = netdev_priv(netdev);
632
633         if (!netif_running(netdev))
634                 return -EINVAL;
635
636         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
637 }
638
639 static void smsc95xx_init_mac_address(struct usbnet *dev)
640 {
641         /* try reading mac address from EEPROM */
642         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
643                         dev->net->dev_addr) == 0) {
644                 if (is_valid_ether_addr(dev->net->dev_addr)) {
645                         /* eeprom values are valid so use them */
646                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
647                         return;
648                 }
649         }
650
651         /* no eeprom, or eeprom values are invalid. generate random MAC */
652         random_ether_addr(dev->net->dev_addr);
653         netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr\n");
654 }
655
656 static int smsc95xx_set_mac_address(struct usbnet *dev)
657 {
658         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
659                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
660         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
661         int ret;
662
663         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
664         if (ret < 0) {
665                 netdev_warn(dev->net, "Failed to write ADDRL: %d\n", ret);
666                 return ret;
667         }
668
669         ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
670         if (ret < 0) {
671                 netdev_warn(dev->net, "Failed to write ADDRH: %d\n", ret);
672                 return ret;
673         }
674
675         return 0;
676 }
677
678 /* starts the TX path */
679 static void smsc95xx_start_tx_path(struct usbnet *dev)
680 {
681         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
682         unsigned long flags;
683         u32 reg_val;
684
685         /* Enable Tx at MAC */
686         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
687         pdata->mac_cr |= MAC_CR_TXEN_;
688         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
689
690         smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
691
692         /* Enable Tx at SCSRs */
693         reg_val = TX_CFG_ON_;
694         smsc95xx_write_reg(dev, TX_CFG, reg_val);
695 }
696
697 /* Starts the Receive path */
698 static void smsc95xx_start_rx_path(struct usbnet *dev)
699 {
700         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
701         unsigned long flags;
702
703         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
704         pdata->mac_cr |= MAC_CR_RXEN_;
705         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
706
707         smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
708 }
709
710 static int smsc95xx_phy_initialize(struct usbnet *dev)
711 {
712         int bmcr, timeout = 0;
713
714         /* Initialize MII structure */
715         dev->mii.dev = dev->net;
716         dev->mii.mdio_read = smsc95xx_mdio_read;
717         dev->mii.mdio_write = smsc95xx_mdio_write;
718         dev->mii.phy_id_mask = 0x1f;
719         dev->mii.reg_num_mask = 0x1f;
720         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
721
722         /* reset phy and wait for reset to complete */
723         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
724
725         do {
726                 msleep(10);
727                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
728                 timeout++;
729         } while ((bmcr & MII_BMCR) && (timeout < 100));
730
731         if (timeout >= 100) {
732                 netdev_warn(dev->net, "timeout on PHY Reset");
733                 return -EIO;
734         }
735
736         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
737                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
738                 ADVERTISE_PAUSE_ASYM);
739
740         /* read to clear */
741         smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
742
743         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
744                 PHY_INT_MASK_DEFAULT_);
745         mii_nway_restart(&dev->mii);
746
747         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
748         return 0;
749 }
750
751 static int smsc95xx_reset(struct usbnet *dev)
752 {
753         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
754         struct net_device *netdev = dev->net;
755         u32 read_buf, write_buf, burst_cap;
756         int ret = 0, timeout;
757
758         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
759
760         write_buf = HW_CFG_LRST_;
761         ret = smsc95xx_write_reg(dev, HW_CFG, write_buf);
762         if (ret < 0) {
763                 netdev_warn(dev->net, "Failed to write HW_CFG_LRST_ bit in HW_CFG register, ret = %d\n",
764                             ret);
765                 return ret;
766         }
767
768         timeout = 0;
769         do {
770                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
771                 if (ret < 0) {
772                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
773                         return ret;
774                 }
775                 msleep(10);
776                 timeout++;
777         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
778
779         if (timeout >= 100) {
780                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
781                 return ret;
782         }
783
784         write_buf = PM_CTL_PHY_RST_;
785         ret = smsc95xx_write_reg(dev, PM_CTRL, write_buf);
786         if (ret < 0) {
787                 netdev_warn(dev->net, "Failed to write PM_CTRL: %d\n", ret);
788                 return ret;
789         }
790
791         timeout = 0;
792         do {
793                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
794                 if (ret < 0) {
795                         netdev_warn(dev->net, "Failed to read PM_CTRL: %d\n", ret);
796                         return ret;
797                 }
798                 msleep(10);
799                 timeout++;
800         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
801
802         if (timeout >= 100) {
803                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
804                 return ret;
805         }
806
807         smsc95xx_init_mac_address(dev);
808
809         ret = smsc95xx_set_mac_address(dev);
810         if (ret < 0)
811                 return ret;
812
813         netif_dbg(dev, ifup, dev->net,
814                   "MAC Address: %pM\n", dev->net->dev_addr);
815
816         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
817         if (ret < 0) {
818                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
819                 return ret;
820         }
821
822         netif_dbg(dev, ifup, dev->net,
823                   "Read Value from HW_CFG : 0x%08x\n", read_buf);
824
825         read_buf |= HW_CFG_BIR_;
826
827         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
828         if (ret < 0) {
829                 netdev_warn(dev->net, "Failed to write HW_CFG_BIR_ bit in HW_CFG register, ret = %d\n",
830                             ret);
831                 return ret;
832         }
833
834         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
835         if (ret < 0) {
836                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
837                 return ret;
838         }
839         netif_dbg(dev, ifup, dev->net,
840                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
841                   read_buf);
842
843         if (!turbo_mode) {
844                 burst_cap = 0;
845                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
846         } else if (dev->udev->speed == USB_SPEED_HIGH) {
847                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
848                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
849         } else {
850                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
851                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
852         }
853
854         netif_dbg(dev, ifup, dev->net,
855                   "rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
856
857         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
858         if (ret < 0) {
859                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
860                 return ret;
861         }
862
863         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
864         if (ret < 0) {
865                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
866                 return ret;
867         }
868         netif_dbg(dev, ifup, dev->net,
869                   "Read Value from BURST_CAP after writing: 0x%08x\n",
870                   read_buf);
871
872         read_buf = DEFAULT_BULK_IN_DELAY;
873         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
874         if (ret < 0) {
875                 netdev_warn(dev->net, "ret = %d\n", ret);
876                 return ret;
877         }
878
879         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
880         if (ret < 0) {
881                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
882                 return ret;
883         }
884         netif_dbg(dev, ifup, dev->net,
885                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
886                   read_buf);
887
888         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
889         if (ret < 0) {
890                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
891                 return ret;
892         }
893         netif_dbg(dev, ifup, dev->net,
894                   "Read Value from HW_CFG: 0x%08x\n", read_buf);
895
896         if (turbo_mode)
897                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
898
899         read_buf &= ~HW_CFG_RXDOFF_;
900
901         /* set Rx data offset=2, Make IP header aligns on word boundary. */
902         read_buf |= NET_IP_ALIGN << 9;
903
904         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
905         if (ret < 0) {
906                 netdev_warn(dev->net, "Failed to write HW_CFG register, ret=%d\n",
907                             ret);
908                 return ret;
909         }
910
911         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
912         if (ret < 0) {
913                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
914                 return ret;
915         }
916         netif_dbg(dev, ifup, dev->net,
917                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
918
919         write_buf = 0xFFFFFFFF;
920         ret = smsc95xx_write_reg(dev, INT_STS, write_buf);
921         if (ret < 0) {
922                 netdev_warn(dev->net, "Failed to write INT_STS register, ret=%d\n",
923                             ret);
924                 return ret;
925         }
926
927         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
928         if (ret < 0) {
929                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
930                 return ret;
931         }
932         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
933
934         /* Configure GPIO pins as LED outputs */
935         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
936                 LED_GPIO_CFG_FDX_LED;
937         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
938         if (ret < 0) {
939                 netdev_warn(dev->net, "Failed to write LED_GPIO_CFG register, ret=%d\n",
940                             ret);
941                 return ret;
942         }
943
944         /* Init Tx */
945         write_buf = 0;
946         ret = smsc95xx_write_reg(dev, FLOW, write_buf);
947         if (ret < 0) {
948                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
949                 return ret;
950         }
951
952         read_buf = AFC_CFG_DEFAULT;
953         ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
954         if (ret < 0) {
955                 netdev_warn(dev->net, "Failed to write AFC_CFG: %d\n", ret);
956                 return ret;
957         }
958
959         /* Don't need mac_cr_lock during initialisation */
960         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
961         if (ret < 0) {
962                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
963                 return ret;
964         }
965
966         /* Init Rx */
967         /* Set Vlan */
968         write_buf = (u32)ETH_P_8021Q;
969         ret = smsc95xx_write_reg(dev, VLAN1, write_buf);
970         if (ret < 0) {
971                 netdev_warn(dev->net, "Failed to write VAN1: %d\n", ret);
972                 return ret;
973         }
974
975         /* Enable or disable checksum offload engines */
976         ethtool_op_set_tx_hw_csum(netdev, pdata->use_tx_csum);
977         ret = smsc95xx_set_csums(dev);
978         if (ret < 0) {
979                 netdev_warn(dev->net, "Failed to set csum offload: %d\n", ret);
980                 return ret;
981         }
982
983         smsc95xx_set_multicast(dev->net);
984
985         if (smsc95xx_phy_initialize(dev) < 0)
986                 return -EIO;
987
988         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
989         if (ret < 0) {
990                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
991                 return ret;
992         }
993
994         /* enable PHY interrupts */
995         read_buf |= INT_EP_CTL_PHY_INT_;
996
997         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
998         if (ret < 0) {
999                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1000                 return ret;
1001         }
1002
1003         smsc95xx_start_tx_path(dev);
1004         smsc95xx_start_rx_path(dev);
1005
1006         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1007         return 0;
1008 }
1009
1010 static const struct net_device_ops smsc95xx_netdev_ops = {
1011         .ndo_open               = usbnet_open,
1012         .ndo_stop               = usbnet_stop,
1013         .ndo_start_xmit         = usbnet_start_xmit,
1014         .ndo_tx_timeout         = usbnet_tx_timeout,
1015         .ndo_change_mtu         = usbnet_change_mtu,
1016         .ndo_set_mac_address    = eth_mac_addr,
1017         .ndo_validate_addr      = eth_validate_addr,
1018         .ndo_do_ioctl           = smsc95xx_ioctl,
1019         .ndo_set_multicast_list = smsc95xx_set_multicast,
1020 };
1021
1022 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1023 {
1024         struct smsc95xx_priv *pdata = NULL;
1025         int ret;
1026
1027         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1028
1029         ret = usbnet_get_endpoints(dev, intf);
1030         if (ret < 0) {
1031                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1032                 return ret;
1033         }
1034
1035         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1036                 GFP_KERNEL);
1037
1038         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1039         if (!pdata) {
1040                 netdev_warn(dev->net, "Unable to allocate struct smsc95xx_priv\n");
1041                 return -ENOMEM;
1042         }
1043
1044         spin_lock_init(&pdata->mac_cr_lock);
1045
1046         pdata->use_tx_csum = DEFAULT_TX_CSUM_ENABLE;
1047         pdata->use_rx_csum = DEFAULT_RX_CSUM_ENABLE;
1048
1049         /* Init all registers */
1050         ret = smsc95xx_reset(dev);
1051
1052         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1053         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1054         dev->net->flags |= IFF_MULTICAST;
1055         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD;
1056         return 0;
1057 }
1058
1059 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1060 {
1061         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1062         if (pdata) {
1063                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1064                 kfree(pdata);
1065                 pdata = NULL;
1066                 dev->data[0] = 0;
1067         }
1068 }
1069
1070 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1071 {
1072         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1073         skb->ip_summed = CHECKSUM_COMPLETE;
1074         skb_trim(skb, skb->len - 2);
1075 }
1076
1077 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1078 {
1079         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1080
1081         while (skb->len > 0) {
1082                 u32 header, align_count;
1083                 struct sk_buff *ax_skb;
1084                 unsigned char *packet;
1085                 u16 size;
1086
1087                 memcpy(&header, skb->data, sizeof(header));
1088                 le32_to_cpus(&header);
1089                 skb_pull(skb, 4 + NET_IP_ALIGN);
1090                 packet = skb->data;
1091
1092                 /* get the packet length */
1093                 size = (u16)((header & RX_STS_FL_) >> 16);
1094                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1095
1096                 if (unlikely(header & RX_STS_ES_)) {
1097                         netif_dbg(dev, rx_err, dev->net,
1098                                   "Error header=0x%08x\n", header);
1099                         dev->net->stats.rx_errors++;
1100                         dev->net->stats.rx_dropped++;
1101
1102                         if (header & RX_STS_CRC_) {
1103                                 dev->net->stats.rx_crc_errors++;
1104                         } else {
1105                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1106                                         dev->net->stats.rx_frame_errors++;
1107
1108                                 if ((header & RX_STS_LE_) &&
1109                                         (!(header & RX_STS_FT_)))
1110                                         dev->net->stats.rx_length_errors++;
1111                         }
1112                 } else {
1113                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1114                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1115                                 netif_dbg(dev, rx_err, dev->net,
1116                                           "size err header=0x%08x\n", header);
1117                                 return 0;
1118                         }
1119
1120                         /* last frame in this batch */
1121                         if (skb->len == size) {
1122                                 if (pdata->use_rx_csum)
1123                                         smsc95xx_rx_csum_offload(skb);
1124                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1125                                 skb->truesize = size + sizeof(struct sk_buff);
1126
1127                                 return 1;
1128                         }
1129
1130                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1131                         if (unlikely(!ax_skb)) {
1132                                 netdev_warn(dev->net, "Error allocating skb\n");
1133                                 return 0;
1134                         }
1135
1136                         ax_skb->len = size;
1137                         ax_skb->data = packet;
1138                         skb_set_tail_pointer(ax_skb, size);
1139
1140                         if (pdata->use_rx_csum)
1141                                 smsc95xx_rx_csum_offload(ax_skb);
1142                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1143                         ax_skb->truesize = size + sizeof(struct sk_buff);
1144
1145                         usbnet_skb_return(dev, ax_skb);
1146                 }
1147
1148                 skb_pull(skb, size);
1149
1150                 /* padding bytes before the next frame starts */
1151                 if (skb->len)
1152                         skb_pull(skb, align_count);
1153         }
1154
1155         if (unlikely(skb->len < 0)) {
1156                 netdev_warn(dev->net, "invalid rx length<0 %d\n", skb->len);
1157                 return 0;
1158         }
1159
1160         return 1;
1161 }
1162
1163 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1164 {
1165         int len = skb->data - skb->head;
1166         u16 high_16 = (u16)(skb->csum_offset + skb->csum_start - len);
1167         u16 low_16 = (u16)(skb->csum_start - len);
1168         return (high_16 << 16) | low_16;
1169 }
1170
1171 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
1172                                          struct sk_buff *skb, gfp_t flags)
1173 {
1174         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1175         bool csum = pdata->use_tx_csum && (skb->ip_summed == CHECKSUM_PARTIAL);
1176         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
1177         u32 tx_cmd_a, tx_cmd_b;
1178
1179         /* We do not advertise SG, so skbs should be already linearized */
1180         BUG_ON(skb_shinfo(skb)->nr_frags);
1181
1182         if (skb_headroom(skb) < overhead) {
1183                 struct sk_buff *skb2 = skb_copy_expand(skb,
1184                         overhead, 0, flags);
1185                 dev_kfree_skb_any(skb);
1186                 skb = skb2;
1187                 if (!skb)
1188                         return NULL;
1189         }
1190
1191         if (csum) {
1192                 if (skb->len <= 45) {
1193                         /* workaround - hardware tx checksum does not work
1194                          * properly with extremely small packets */
1195                         long csstart = skb->csum_start - skb_headroom(skb);
1196                         __wsum calc = csum_partial(skb->data + csstart,
1197                                 skb->len - csstart, 0);
1198                         *((__sum16 *)(skb->data + csstart
1199                                 + skb->csum_offset)) = csum_fold(calc);
1200
1201                         csum = false;
1202                 } else {
1203                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
1204                         skb_push(skb, 4);
1205                         memcpy(skb->data, &csum_preamble, 4);
1206                 }
1207         }
1208
1209         skb_push(skb, 4);
1210         tx_cmd_b = (u32)(skb->len - 4);
1211         if (csum)
1212                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
1213         cpu_to_le32s(&tx_cmd_b);
1214         memcpy(skb->data, &tx_cmd_b, 4);
1215
1216         skb_push(skb, 4);
1217         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
1218                 TX_CMD_A_LAST_SEG_;
1219         cpu_to_le32s(&tx_cmd_a);
1220         memcpy(skb->data, &tx_cmd_a, 4);
1221
1222         return skb;
1223 }
1224
1225 static const struct driver_info smsc95xx_info = {
1226         .description    = "smsc95xx USB 2.0 Ethernet",
1227         .bind           = smsc95xx_bind,
1228         .unbind         = smsc95xx_unbind,
1229         .link_reset     = smsc95xx_link_reset,
1230         .reset          = smsc95xx_reset,
1231         .rx_fixup       = smsc95xx_rx_fixup,
1232         .tx_fixup       = smsc95xx_tx_fixup,
1233         .status         = smsc95xx_status,
1234         .flags          = FLAG_ETHER | FLAG_SEND_ZLP,
1235 };
1236
1237 static const struct usb_device_id products[] = {
1238         {
1239                 /* SMSC9500 USB Ethernet Device */
1240                 USB_DEVICE(0x0424, 0x9500),
1241                 .driver_info = (unsigned long) &smsc95xx_info,
1242         },
1243         {
1244                 /* SMSC9505 USB Ethernet Device */
1245                 USB_DEVICE(0x0424, 0x9505),
1246                 .driver_info = (unsigned long) &smsc95xx_info,
1247         },
1248         {
1249                 /* SMSC9500A USB Ethernet Device */
1250                 USB_DEVICE(0x0424, 0x9E00),
1251                 .driver_info = (unsigned long) &smsc95xx_info,
1252         },
1253         {
1254                 /* SMSC9505A USB Ethernet Device */
1255                 USB_DEVICE(0x0424, 0x9E01),
1256                 .driver_info = (unsigned long) &smsc95xx_info,
1257         },
1258         {
1259                 /* SMSC9512/9514 USB Hub & Ethernet Device */
1260                 USB_DEVICE(0x0424, 0xec00),
1261                 .driver_info = (unsigned long) &smsc95xx_info,
1262         },
1263         {
1264                 /* SMSC9500 USB Ethernet Device (SAL10) */
1265                 USB_DEVICE(0x0424, 0x9900),
1266                 .driver_info = (unsigned long) &smsc95xx_info,
1267         },
1268         {
1269                 /* SMSC9505 USB Ethernet Device (SAL10) */
1270                 USB_DEVICE(0x0424, 0x9901),
1271                 .driver_info = (unsigned long) &smsc95xx_info,
1272         },
1273         {
1274                 /* SMSC9500A USB Ethernet Device (SAL10) */
1275                 USB_DEVICE(0x0424, 0x9902),
1276                 .driver_info = (unsigned long) &smsc95xx_info,
1277         },
1278         {
1279                 /* SMSC9505A USB Ethernet Device (SAL10) */
1280                 USB_DEVICE(0x0424, 0x9903),
1281                 .driver_info = (unsigned long) &smsc95xx_info,
1282         },
1283         {
1284                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
1285                 USB_DEVICE(0x0424, 0x9904),
1286                 .driver_info = (unsigned long) &smsc95xx_info,
1287         },
1288         {
1289                 /* SMSC9500A USB Ethernet Device (HAL) */
1290                 USB_DEVICE(0x0424, 0x9905),
1291                 .driver_info = (unsigned long) &smsc95xx_info,
1292         },
1293         {
1294                 /* SMSC9505A USB Ethernet Device (HAL) */
1295                 USB_DEVICE(0x0424, 0x9906),
1296                 .driver_info = (unsigned long) &smsc95xx_info,
1297         },
1298         {
1299                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
1300                 USB_DEVICE(0x0424, 0x9907),
1301                 .driver_info = (unsigned long) &smsc95xx_info,
1302         },
1303         {
1304                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
1305                 USB_DEVICE(0x0424, 0x9908),
1306                 .driver_info = (unsigned long) &smsc95xx_info,
1307         },
1308         {
1309                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
1310                 USB_DEVICE(0x0424, 0x9909),
1311                 .driver_info = (unsigned long) &smsc95xx_info,
1312         },
1313         { },            /* END */
1314 };
1315 MODULE_DEVICE_TABLE(usb, products);
1316
1317 static struct usb_driver smsc95xx_driver = {
1318         .name           = "smsc95xx",
1319         .id_table       = products,
1320         .probe          = usbnet_probe,
1321         .suspend        = usbnet_suspend,
1322         .resume         = usbnet_resume,
1323         .disconnect     = usbnet_disconnect,
1324 };
1325
1326 static int __init smsc95xx_init(void)
1327 {
1328         return usb_register(&smsc95xx_driver);
1329 }
1330 module_init(smsc95xx_init);
1331
1332 static void __exit smsc95xx_exit(void)
1333 {
1334         usb_deregister(&smsc95xx_driver);
1335 }
1336 module_exit(smsc95xx_exit);
1337
1338 MODULE_AUTHOR("Nancy Lin");
1339 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>");
1340 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
1341 MODULE_LICENSE("GPL");