usbnet: fix skb traversing races during unlink(v2)
[linux-2.6.git] / drivers / net / usb / catc.c
1 /*
2  *  Copyright (c) 2001 Vojtech Pavlik
3  *
4  *  CATC EL1210A NetMate USB Ethernet driver
5  *
6  *  Sponsored by SuSE
7  *
8  *  Based on the work of
9  *              Donald Becker
10  * 
11  *  Old chipset support added by Simon Evans <spse@secret.org.uk> 2002
12  *    - adds support for Belkin F5U011
13  */
14
15 /*
16  * This program is free software; you can redistribute it and/or modify
17  * it under the terms of the GNU General Public License as published by
18  * the Free Software Foundation; either version 2 of the License, or 
19  * (at your option) any later version.
20  * 
21  * This program is distributed in the hope that it will be useful,
22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
24  * GNU General Public License for more details.
25  * 
26  * You should have received a copy of the GNU General Public License
27  * along with this program; if not, write to the Free Software
28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29  * 
30  * Should you need to contact me, the author, you can do so either by
31  * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
32  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
33  */
34
35 #include <linux/init.h>
36 #include <linux/module.h>
37 #include <linux/kernel.h>
38 #include <linux/string.h>
39 #include <linux/netdevice.h>
40 #include <linux/etherdevice.h>
41 #include <linux/skbuff.h>
42 #include <linux/spinlock.h>
43 #include <linux/ethtool.h>
44 #include <linux/crc32.h>
45 #include <linux/bitops.h>
46 #include <linux/gfp.h>
47 #include <asm/uaccess.h>
48
49 #undef DEBUG
50
51 #include <linux/usb.h>
52
53 /*
54  * Version information.
55  */
56
57 #define DRIVER_VERSION "v2.8"
58 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@suse.cz>"
59 #define DRIVER_DESC "CATC EL1210A NetMate USB Ethernet driver"
60 #define SHORT_DRIVER_DESC "EL1210A NetMate USB Ethernet"
61
62 MODULE_AUTHOR(DRIVER_AUTHOR);
63 MODULE_DESCRIPTION(DRIVER_DESC);
64 MODULE_LICENSE("GPL");
65
66 static const char driver_name[] = "catc";
67
68 /*
69  * Some defines.
70  */ 
71
72 #define STATS_UPDATE            (HZ)    /* Time between stats updates */
73 #define TX_TIMEOUT              (5*HZ)  /* Max time the queue can be stopped */
74 #define PKT_SZ                  1536    /* Max Ethernet packet size */
75 #define RX_MAX_BURST            15      /* Max packets per rx buffer (> 0, < 16) */
76 #define TX_MAX_BURST            15      /* Max full sized packets per tx buffer (> 0) */
77 #define CTRL_QUEUE              16      /* Max control requests in flight (power of two) */
78 #define RX_PKT_SZ               1600    /* Max size of receive packet for F5U011 */
79
80 /*
81  * Control requests.
82  */
83
84 enum control_requests {
85         ReadMem =       0xf1,
86         GetMac =        0xf2,
87         Reset =         0xf4,
88         SetMac =        0xf5,
89         SetRxMode =     0xf5,  /* F5U011 only */
90         WriteROM =      0xf8,
91         SetReg =        0xfa,
92         GetReg =        0xfb,
93         WriteMem =      0xfc,
94         ReadROM =       0xfd,
95 };
96
97 /*
98  * Registers.
99  */
100
101 enum register_offsets {
102         TxBufCount =    0x20,
103         RxBufCount =    0x21,
104         OpModes =       0x22,
105         TxQed =         0x23,
106         RxQed =         0x24,
107         MaxBurst =      0x25,
108         RxUnit =        0x60,
109         EthStatus =     0x61,
110         StationAddr0 =  0x67,
111         EthStats =      0x69,
112         LEDCtrl =       0x81,
113 };
114
115 enum eth_stats {
116         TxSingleColl =  0x00,
117         TxMultiColl =   0x02,
118         TxExcessColl =  0x04,
119         RxFramErr =     0x06,
120 };
121
122 enum op_mode_bits {
123         Op3MemWaits =   0x03,
124         OpLenInclude =  0x08,
125         OpRxMerge =     0x10,
126         OpTxMerge =     0x20,
127         OpWin95bugfix = 0x40,
128         OpLoopback =    0x80,
129 };
130
131 enum rx_filter_bits {
132         RxEnable =      0x01,
133         RxPolarity =    0x02,
134         RxForceOK =     0x04,
135         RxMultiCast =   0x08,
136         RxPromisc =     0x10,
137         AltRxPromisc =  0x20, /* F5U011 uses different bit */
138 };
139
140 enum led_values {
141         LEDFast =       0x01,
142         LEDSlow =       0x02,
143         LEDFlash =      0x03,
144         LEDPulse =      0x04,
145         LEDLink =       0x08,
146 };
147
148 enum link_status {
149         LinkNoChange = 0,
150         LinkGood     = 1,
151         LinkBad      = 2
152 };
153
154 /*
155  * The catc struct.
156  */
157
158 #define CTRL_RUNNING    0
159 #define RX_RUNNING      1
160 #define TX_RUNNING      2
161
162 struct catc {
163         struct net_device *netdev;
164         struct usb_device *usbdev;
165
166         unsigned long flags;
167
168         unsigned int tx_ptr, tx_idx;
169         unsigned int ctrl_head, ctrl_tail;
170         spinlock_t tx_lock, ctrl_lock;
171
172         u8 tx_buf[2][TX_MAX_BURST * (PKT_SZ + 2)];
173         u8 rx_buf[RX_MAX_BURST * (PKT_SZ + 2)];
174         u8 irq_buf[2];
175         u8 ctrl_buf[64];
176         struct usb_ctrlrequest ctrl_dr;
177
178         struct timer_list timer;
179         u8 stats_buf[8];
180         u16 stats_vals[4];
181         unsigned long last_stats;
182
183         u8 multicast[64];
184
185         struct ctrl_queue {
186                 u8 dir;
187                 u8 request;
188                 u16 value;
189                 u16 index;
190                 void *buf;
191                 int len;
192                 void (*callback)(struct catc *catc, struct ctrl_queue *q);
193         } ctrl_queue[CTRL_QUEUE];
194
195         struct urb *tx_urb, *rx_urb, *irq_urb, *ctrl_urb;
196
197         u8 is_f5u011;   /* Set if device is an F5U011 */
198         u8 rxmode[2];   /* Used for F5U011 */
199         atomic_t recq_sz; /* Used for F5U011 - counter of waiting rx packets */
200 };
201
202 /*
203  * Useful macros.
204  */
205
206 #define catc_get_mac(catc, mac)                         catc_ctrl_msg(catc, USB_DIR_IN,  GetMac, 0, 0, mac,  6)
207 #define catc_reset(catc)                                catc_ctrl_msg(catc, USB_DIR_OUT, Reset, 0, 0, NULL, 0)
208 #define catc_set_reg(catc, reg, val)                    catc_ctrl_msg(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0)
209 #define catc_get_reg(catc, reg, buf)                    catc_ctrl_msg(catc, USB_DIR_IN,  GetReg, 0, reg, buf, 1)
210 #define catc_write_mem(catc, addr, buf, size)           catc_ctrl_msg(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size)
211 #define catc_read_mem(catc, addr, buf, size)            catc_ctrl_msg(catc, USB_DIR_IN,  ReadMem, 0, addr, buf, size)
212
213 #define f5u011_rxmode(catc, rxmode)                     catc_ctrl_msg(catc, USB_DIR_OUT, SetRxMode, 0, 1, rxmode, 2)
214 #define f5u011_rxmode_async(catc, rxmode)               catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 1, &rxmode, 2, NULL)
215 #define f5u011_mchash_async(catc, hash)                 catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 2, &hash, 8, NULL)
216
217 #define catc_set_reg_async(catc, reg, val)              catc_ctrl_async(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0, NULL)
218 #define catc_get_reg_async(catc, reg, cb)               catc_ctrl_async(catc, USB_DIR_IN, GetReg, 0, reg, NULL, 1, cb)
219 #define catc_write_mem_async(catc, addr, buf, size)     catc_ctrl_async(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size, NULL)
220
221 /*
222  * Receive routines.
223  */
224
225 static void catc_rx_done(struct urb *urb)
226 {
227         struct catc *catc = urb->context;
228         u8 *pkt_start = urb->transfer_buffer;
229         struct sk_buff *skb;
230         int pkt_len, pkt_offset = 0;
231         int status = urb->status;
232
233         if (!catc->is_f5u011) {
234                 clear_bit(RX_RUNNING, &catc->flags);
235                 pkt_offset = 2;
236         }
237
238         if (status) {
239                 dbg("rx_done, status %d, length %d", status, urb->actual_length);
240                 return;
241         }
242
243         do {
244                 if(!catc->is_f5u011) {
245                         pkt_len = le16_to_cpup((__le16*)pkt_start);
246                         if (pkt_len > urb->actual_length) {
247                                 catc->netdev->stats.rx_length_errors++;
248                                 catc->netdev->stats.rx_errors++;
249                                 break;
250                         }
251                 } else {
252                         pkt_len = urb->actual_length;
253                 }
254
255                 if (!(skb = dev_alloc_skb(pkt_len)))
256                         return;
257
258                 skb_copy_to_linear_data(skb, pkt_start + pkt_offset, pkt_len);
259                 skb_put(skb, pkt_len);
260
261                 skb->protocol = eth_type_trans(skb, catc->netdev);
262                 netif_rx(skb);
263
264                 catc->netdev->stats.rx_packets++;
265                 catc->netdev->stats.rx_bytes += pkt_len;
266
267                 /* F5U011 only does one packet per RX */
268                 if (catc->is_f5u011)
269                         break;
270                 pkt_start += (((pkt_len + 1) >> 6) + 1) << 6;
271
272         } while (pkt_start - (u8 *) urb->transfer_buffer < urb->actual_length);
273
274         if (catc->is_f5u011) {
275                 if (atomic_read(&catc->recq_sz)) {
276                         int state;
277                         atomic_dec(&catc->recq_sz);
278                         dbg("getting extra packet");
279                         urb->dev = catc->usbdev;
280                         if ((state = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
281                                 dbg("submit(rx_urb) status %d", state);
282                         }
283                 } else {
284                         clear_bit(RX_RUNNING, &catc->flags);
285                 }
286         }
287 }
288
289 static void catc_irq_done(struct urb *urb)
290 {
291         struct catc *catc = urb->context;
292         u8 *data = urb->transfer_buffer;
293         int status = urb->status;
294         unsigned int hasdata = 0, linksts = LinkNoChange;
295         int res;
296
297         if (!catc->is_f5u011) {
298                 hasdata = data[1] & 0x80;
299                 if (data[1] & 0x40)
300                         linksts = LinkGood;
301                 else if (data[1] & 0x20)
302                         linksts = LinkBad;
303         } else {
304                 hasdata = (unsigned int)(be16_to_cpup((__be16*)data) & 0x0fff);
305                 if (data[0] == 0x90)
306                         linksts = LinkGood;
307                 else if (data[0] == 0xA0)
308                         linksts = LinkBad;
309         }
310
311         switch (status) {
312         case 0:                 /* success */
313                 break;
314         case -ECONNRESET:       /* unlink */
315         case -ENOENT:
316         case -ESHUTDOWN:
317                 return;
318         /* -EPIPE:  should clear the halt */
319         default:                /* error */
320                 dbg("irq_done, status %d, data %02x %02x.", status, data[0], data[1]);
321                 goto resubmit;
322         }
323
324         if (linksts == LinkGood) {
325                 netif_carrier_on(catc->netdev);
326                 dbg("link ok");
327         }
328
329         if (linksts == LinkBad) {
330                 netif_carrier_off(catc->netdev);
331                 dbg("link bad");
332         }
333
334         if (hasdata) {
335                 if (test_and_set_bit(RX_RUNNING, &catc->flags)) {
336                         if (catc->is_f5u011)
337                                 atomic_inc(&catc->recq_sz);
338                 } else {
339                         catc->rx_urb->dev = catc->usbdev;
340                         if ((res = usb_submit_urb(catc->rx_urb, GFP_ATOMIC)) < 0) {
341                                 err("submit(rx_urb) status %d", res);
342                         }
343                 } 
344         }
345 resubmit:
346         res = usb_submit_urb (urb, GFP_ATOMIC);
347         if (res)
348                 err ("can't resubmit intr, %s-%s, status %d",
349                                 catc->usbdev->bus->bus_name,
350                                 catc->usbdev->devpath, res);
351 }
352
353 /*
354  * Transmit routines.
355  */
356
357 static int catc_tx_run(struct catc *catc)
358 {
359         int status;
360
361         if (catc->is_f5u011)
362                 catc->tx_ptr = (catc->tx_ptr + 63) & ~63;
363
364         catc->tx_urb->transfer_buffer_length = catc->tx_ptr;
365         catc->tx_urb->transfer_buffer = catc->tx_buf[catc->tx_idx];
366         catc->tx_urb->dev = catc->usbdev;
367
368         if ((status = usb_submit_urb(catc->tx_urb, GFP_ATOMIC)) < 0)
369                 err("submit(tx_urb), status %d", status);
370
371         catc->tx_idx = !catc->tx_idx;
372         catc->tx_ptr = 0;
373
374         catc->netdev->trans_start = jiffies;
375         return status;
376 }
377
378 static void catc_tx_done(struct urb *urb)
379 {
380         struct catc *catc = urb->context;
381         unsigned long flags;
382         int r, status = urb->status;
383
384         if (status == -ECONNRESET) {
385                 dbg("Tx Reset.");
386                 urb->status = 0;
387                 catc->netdev->trans_start = jiffies;
388                 catc->netdev->stats.tx_errors++;
389                 clear_bit(TX_RUNNING, &catc->flags);
390                 netif_wake_queue(catc->netdev);
391                 return;
392         }
393
394         if (status) {
395                 dbg("tx_done, status %d, length %d", status, urb->actual_length);
396                 return;
397         }
398
399         spin_lock_irqsave(&catc->tx_lock, flags);
400
401         if (catc->tx_ptr) {
402                 r = catc_tx_run(catc);
403                 if (unlikely(r < 0))
404                         clear_bit(TX_RUNNING, &catc->flags);
405         } else {
406                 clear_bit(TX_RUNNING, &catc->flags);
407         }
408
409         netif_wake_queue(catc->netdev);
410
411         spin_unlock_irqrestore(&catc->tx_lock, flags);
412 }
413
414 static netdev_tx_t catc_start_xmit(struct sk_buff *skb,
415                                          struct net_device *netdev)
416 {
417         struct catc *catc = netdev_priv(netdev);
418         unsigned long flags;
419         int r = 0;
420         char *tx_buf;
421
422         spin_lock_irqsave(&catc->tx_lock, flags);
423
424         catc->tx_ptr = (((catc->tx_ptr - 1) >> 6) + 1) << 6;
425         tx_buf = catc->tx_buf[catc->tx_idx] + catc->tx_ptr;
426         if (catc->is_f5u011)
427                 *(__be16 *)tx_buf = cpu_to_be16(skb->len);
428         else
429                 *(__le16 *)tx_buf = cpu_to_le16(skb->len);
430         skb_copy_from_linear_data(skb, tx_buf + 2, skb->len);
431         catc->tx_ptr += skb->len + 2;
432
433         if (!test_and_set_bit(TX_RUNNING, &catc->flags)) {
434                 r = catc_tx_run(catc);
435                 if (r < 0)
436                         clear_bit(TX_RUNNING, &catc->flags);
437         }
438
439         if ((catc->is_f5u011 && catc->tx_ptr) ||
440             (catc->tx_ptr >= ((TX_MAX_BURST - 1) * (PKT_SZ + 2))))
441                 netif_stop_queue(netdev);
442
443         spin_unlock_irqrestore(&catc->tx_lock, flags);
444
445         if (r >= 0) {
446                 catc->netdev->stats.tx_bytes += skb->len;
447                 catc->netdev->stats.tx_packets++;
448         }
449
450         dev_kfree_skb(skb);
451
452         return NETDEV_TX_OK;
453 }
454
455 static void catc_tx_timeout(struct net_device *netdev)
456 {
457         struct catc *catc = netdev_priv(netdev);
458
459         dev_warn(&netdev->dev, "Transmit timed out.\n");
460         usb_unlink_urb(catc->tx_urb);
461 }
462
463 /*
464  * Control messages.
465  */
466
467 static int catc_ctrl_msg(struct catc *catc, u8 dir, u8 request, u16 value, u16 index, void *buf, int len)
468 {
469         int retval = usb_control_msg(catc->usbdev,
470                 dir ? usb_rcvctrlpipe(catc->usbdev, 0) : usb_sndctrlpipe(catc->usbdev, 0),
471                  request, 0x40 | dir, value, index, buf, len, 1000);
472         return retval < 0 ? retval : 0;
473 }
474
475 static void catc_ctrl_run(struct catc *catc)
476 {
477         struct ctrl_queue *q = catc->ctrl_queue + catc->ctrl_tail;
478         struct usb_device *usbdev = catc->usbdev;
479         struct urb *urb = catc->ctrl_urb;
480         struct usb_ctrlrequest *dr = &catc->ctrl_dr;
481         int status;
482
483         dr->bRequest = q->request;
484         dr->bRequestType = 0x40 | q->dir;
485         dr->wValue = cpu_to_le16(q->value);
486         dr->wIndex = cpu_to_le16(q->index);
487         dr->wLength = cpu_to_le16(q->len);
488
489         urb->pipe = q->dir ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0);
490         urb->transfer_buffer_length = q->len;
491         urb->transfer_buffer = catc->ctrl_buf;
492         urb->setup_packet = (void *) dr;
493         urb->dev = usbdev;
494
495         if (!q->dir && q->buf && q->len)
496                 memcpy(catc->ctrl_buf, q->buf, q->len);
497
498         if ((status = usb_submit_urb(catc->ctrl_urb, GFP_ATOMIC)))
499                 err("submit(ctrl_urb) status %d", status);
500 }
501
502 static void catc_ctrl_done(struct urb *urb)
503 {
504         struct catc *catc = urb->context;
505         struct ctrl_queue *q;
506         unsigned long flags;
507         int status = urb->status;
508
509         if (status)
510                 dbg("ctrl_done, status %d, len %d.", status, urb->actual_length);
511
512         spin_lock_irqsave(&catc->ctrl_lock, flags);
513
514         q = catc->ctrl_queue + catc->ctrl_tail;
515
516         if (q->dir) {
517                 if (q->buf && q->len)
518                         memcpy(q->buf, catc->ctrl_buf, q->len);
519                 else
520                         q->buf = catc->ctrl_buf;
521         }
522
523         if (q->callback)
524                 q->callback(catc, q);
525
526         catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
527
528         if (catc->ctrl_head != catc->ctrl_tail)
529                 catc_ctrl_run(catc);
530         else
531                 clear_bit(CTRL_RUNNING, &catc->flags);
532
533         spin_unlock_irqrestore(&catc->ctrl_lock, flags);
534 }
535
536 static int catc_ctrl_async(struct catc *catc, u8 dir, u8 request, u16 value,
537         u16 index, void *buf, int len, void (*callback)(struct catc *catc, struct ctrl_queue *q))
538 {
539         struct ctrl_queue *q;
540         int retval = 0;
541         unsigned long flags;
542
543         spin_lock_irqsave(&catc->ctrl_lock, flags);
544         
545         q = catc->ctrl_queue + catc->ctrl_head;
546
547         q->dir = dir;
548         q->request = request;
549         q->value = value;
550         q->index = index;
551         q->buf = buf;
552         q->len = len;
553         q->callback = callback;
554
555         catc->ctrl_head = (catc->ctrl_head + 1) & (CTRL_QUEUE - 1);
556
557         if (catc->ctrl_head == catc->ctrl_tail) {
558                 err("ctrl queue full");
559                 catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
560                 retval = -1;
561         }
562
563         if (!test_and_set_bit(CTRL_RUNNING, &catc->flags))
564                 catc_ctrl_run(catc);
565
566         spin_unlock_irqrestore(&catc->ctrl_lock, flags);
567
568         return retval;
569 }
570
571 /*
572  * Statistics.
573  */
574
575 static void catc_stats_done(struct catc *catc, struct ctrl_queue *q)
576 {
577         int index = q->index - EthStats;
578         u16 data, last;
579
580         catc->stats_buf[index] = *((char *)q->buf);
581
582         if (index & 1)
583                 return;
584
585         data = ((u16)catc->stats_buf[index] << 8) | catc->stats_buf[index + 1];
586         last = catc->stats_vals[index >> 1];
587
588         switch (index) {
589                 case TxSingleColl:
590                 case TxMultiColl:
591                         catc->netdev->stats.collisions += data - last;
592                         break;
593                 case TxExcessColl:
594                         catc->netdev->stats.tx_aborted_errors += data - last;
595                         catc->netdev->stats.tx_errors += data - last;
596                         break;
597                 case RxFramErr:
598                         catc->netdev->stats.rx_frame_errors += data - last;
599                         catc->netdev->stats.rx_errors += data - last;
600                         break;
601         }
602
603         catc->stats_vals[index >> 1] = data;
604 }
605
606 static void catc_stats_timer(unsigned long data)
607 {
608         struct catc *catc = (void *) data;
609         int i;
610
611         for (i = 0; i < 8; i++)
612                 catc_get_reg_async(catc, EthStats + 7 - i, catc_stats_done);
613
614         mod_timer(&catc->timer, jiffies + STATS_UPDATE);
615 }
616
617 /*
618  * Receive modes. Broadcast, Multicast, Promisc.
619  */
620
621 static void catc_multicast(unsigned char *addr, u8 *multicast)
622 {
623         u32 crc;
624
625         crc = ether_crc_le(6, addr);
626         multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
627 }
628
629 static void catc_set_multicast_list(struct net_device *netdev)
630 {
631         struct catc *catc = netdev_priv(netdev);
632         struct netdev_hw_addr *ha;
633         u8 broadcast[6];
634         u8 rx = RxEnable | RxPolarity | RxMultiCast;
635
636         memset(broadcast, 0xff, 6);
637         memset(catc->multicast, 0, 64);
638
639         catc_multicast(broadcast, catc->multicast);
640         catc_multicast(netdev->dev_addr, catc->multicast);
641
642         if (netdev->flags & IFF_PROMISC) {
643                 memset(catc->multicast, 0xff, 64);
644                 rx |= (!catc->is_f5u011) ? RxPromisc : AltRxPromisc;
645         } 
646
647         if (netdev->flags & IFF_ALLMULTI) {
648                 memset(catc->multicast, 0xff, 64);
649         } else {
650                 netdev_for_each_mc_addr(ha, netdev) {
651                         u32 crc = ether_crc_le(6, ha->addr);
652                         if (!catc->is_f5u011) {
653                                 catc->multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
654                         } else {
655                                 catc->multicast[7-(crc >> 29)] |= 1 << ((crc >> 26) & 7);
656                         }
657                 }
658         }
659         if (!catc->is_f5u011) {
660                 catc_set_reg_async(catc, RxUnit, rx);
661                 catc_write_mem_async(catc, 0xfa80, catc->multicast, 64);
662         } else {
663                 f5u011_mchash_async(catc, catc->multicast);
664                 if (catc->rxmode[0] != rx) {
665                         catc->rxmode[0] = rx;
666                         dbg("Setting RX mode to %2.2X %2.2X", catc->rxmode[0], catc->rxmode[1]);
667                         f5u011_rxmode_async(catc, catc->rxmode);
668                 }
669         }
670 }
671
672 static void catc_get_drvinfo(struct net_device *dev,
673                              struct ethtool_drvinfo *info)
674 {
675         struct catc *catc = netdev_priv(dev);
676         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
677         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
678         usb_make_path (catc->usbdev, info->bus_info, sizeof info->bus_info);
679 }
680
681 static int catc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
682 {
683         struct catc *catc = netdev_priv(dev);
684         if (!catc->is_f5u011)
685                 return -EOPNOTSUPP;
686
687         cmd->supported = SUPPORTED_10baseT_Half | SUPPORTED_TP;
688         cmd->advertising = ADVERTISED_10baseT_Half | ADVERTISED_TP;
689         ethtool_cmd_speed_set(cmd, SPEED_10);
690         cmd->duplex = DUPLEX_HALF;
691         cmd->port = PORT_TP; 
692         cmd->phy_address = 0;
693         cmd->transceiver = XCVR_INTERNAL;
694         cmd->autoneg = AUTONEG_DISABLE;
695         cmd->maxtxpkt = 1;
696         cmd->maxrxpkt = 1;
697         return 0;
698 }
699
700 static const struct ethtool_ops ops = {
701         .get_drvinfo = catc_get_drvinfo,
702         .get_settings = catc_get_settings,
703         .get_link = ethtool_op_get_link
704 };
705
706 /*
707  * Open, close.
708  */
709
710 static int catc_open(struct net_device *netdev)
711 {
712         struct catc *catc = netdev_priv(netdev);
713         int status;
714
715         catc->irq_urb->dev = catc->usbdev;
716         if ((status = usb_submit_urb(catc->irq_urb, GFP_KERNEL)) < 0) {
717                 err("submit(irq_urb) status %d", status);
718                 return -1;
719         }
720
721         netif_start_queue(netdev);
722
723         if (!catc->is_f5u011)
724                 mod_timer(&catc->timer, jiffies + STATS_UPDATE);
725
726         return 0;
727 }
728
729 static int catc_stop(struct net_device *netdev)
730 {
731         struct catc *catc = netdev_priv(netdev);
732
733         netif_stop_queue(netdev);
734
735         if (!catc->is_f5u011)
736                 del_timer_sync(&catc->timer);
737
738         usb_kill_urb(catc->rx_urb);
739         usb_kill_urb(catc->tx_urb);
740         usb_kill_urb(catc->irq_urb);
741         usb_kill_urb(catc->ctrl_urb);
742
743         return 0;
744 }
745
746 static const struct net_device_ops catc_netdev_ops = {
747         .ndo_open               = catc_open,
748         .ndo_stop               = catc_stop,
749         .ndo_start_xmit         = catc_start_xmit,
750
751         .ndo_tx_timeout         = catc_tx_timeout,
752         .ndo_set_multicast_list = catc_set_multicast_list,
753         .ndo_change_mtu         = eth_change_mtu,
754         .ndo_set_mac_address    = eth_mac_addr,
755         .ndo_validate_addr      = eth_validate_addr,
756 };
757
758 /*
759  * USB probe, disconnect.
760  */
761
762 static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id)
763 {
764         struct usb_device *usbdev = interface_to_usbdev(intf);
765         struct net_device *netdev;
766         struct catc *catc;
767         u8 broadcast[6];
768         int i, pktsz;
769
770         if (usb_set_interface(usbdev,
771                         intf->altsetting->desc.bInterfaceNumber, 1)) {
772                 err("Can't set altsetting 1.");
773                 return -EIO;
774         }
775
776         netdev = alloc_etherdev(sizeof(struct catc));
777         if (!netdev)
778                 return -ENOMEM;
779
780         catc = netdev_priv(netdev);
781
782         netdev->netdev_ops = &catc_netdev_ops;
783         netdev->watchdog_timeo = TX_TIMEOUT;
784         SET_ETHTOOL_OPS(netdev, &ops);
785
786         catc->usbdev = usbdev;
787         catc->netdev = netdev;
788
789         spin_lock_init(&catc->tx_lock);
790         spin_lock_init(&catc->ctrl_lock);
791
792         init_timer(&catc->timer);
793         catc->timer.data = (long) catc;
794         catc->timer.function = catc_stats_timer;
795
796         catc->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
797         catc->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
798         catc->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
799         catc->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
800         if ((!catc->ctrl_urb) || (!catc->tx_urb) || 
801             (!catc->rx_urb) || (!catc->irq_urb)) {
802                 err("No free urbs available.");
803                 usb_free_urb(catc->ctrl_urb);
804                 usb_free_urb(catc->tx_urb);
805                 usb_free_urb(catc->rx_urb);
806                 usb_free_urb(catc->irq_urb);
807                 free_netdev(netdev);
808                 return -ENOMEM;
809         }
810
811         /* The F5U011 has the same vendor/product as the netmate but a device version of 0x130 */
812         if (le16_to_cpu(usbdev->descriptor.idVendor) == 0x0423 && 
813             le16_to_cpu(usbdev->descriptor.idProduct) == 0xa &&
814             le16_to_cpu(catc->usbdev->descriptor.bcdDevice) == 0x0130) {
815                 dbg("Testing for f5u011");
816                 catc->is_f5u011 = 1;            
817                 atomic_set(&catc->recq_sz, 0);
818                 pktsz = RX_PKT_SZ;
819         } else {
820                 pktsz = RX_MAX_BURST * (PKT_SZ + 2);
821         }
822         
823         usb_fill_control_urb(catc->ctrl_urb, usbdev, usb_sndctrlpipe(usbdev, 0),
824                 NULL, NULL, 0, catc_ctrl_done, catc);
825
826         usb_fill_bulk_urb(catc->tx_urb, usbdev, usb_sndbulkpipe(usbdev, 1),
827                 NULL, 0, catc_tx_done, catc);
828
829         usb_fill_bulk_urb(catc->rx_urb, usbdev, usb_rcvbulkpipe(usbdev, 1),
830                 catc->rx_buf, pktsz, catc_rx_done, catc);
831
832         usb_fill_int_urb(catc->irq_urb, usbdev, usb_rcvintpipe(usbdev, 2),
833                 catc->irq_buf, 2, catc_irq_done, catc, 1);
834
835         if (!catc->is_f5u011) {
836                 dbg("Checking memory size\n");
837
838                 i = 0x12345678;
839                 catc_write_mem(catc, 0x7a80, &i, 4);
840                 i = 0x87654321; 
841                 catc_write_mem(catc, 0xfa80, &i, 4);
842                 catc_read_mem(catc, 0x7a80, &i, 4);
843           
844                 switch (i) {
845                 case 0x12345678:
846                         catc_set_reg(catc, TxBufCount, 8);
847                         catc_set_reg(catc, RxBufCount, 32);
848                         dbg("64k Memory\n");
849                         break;
850                 default:
851                         dev_warn(&intf->dev,
852                                  "Couldn't detect memory size, assuming 32k\n");
853                 case 0x87654321:
854                         catc_set_reg(catc, TxBufCount, 4);
855                         catc_set_reg(catc, RxBufCount, 16);
856                         dbg("32k Memory\n");
857                         break;
858                 }
859           
860                 dbg("Getting MAC from SEEROM.");
861           
862                 catc_get_mac(catc, netdev->dev_addr);
863                 
864                 dbg("Setting MAC into registers.");
865           
866                 for (i = 0; i < 6; i++)
867                         catc_set_reg(catc, StationAddr0 - i, netdev->dev_addr[i]);
868                 
869                 dbg("Filling the multicast list.");
870           
871                 memset(broadcast, 0xff, 6);
872                 catc_multicast(broadcast, catc->multicast);
873                 catc_multicast(netdev->dev_addr, catc->multicast);
874                 catc_write_mem(catc, 0xfa80, catc->multicast, 64);
875                 
876                 dbg("Clearing error counters.");
877                 
878                 for (i = 0; i < 8; i++)
879                         catc_set_reg(catc, EthStats + i, 0);
880                 catc->last_stats = jiffies;
881                 
882                 dbg("Enabling.");
883                 
884                 catc_set_reg(catc, MaxBurst, RX_MAX_BURST);
885                 catc_set_reg(catc, OpModes, OpTxMerge | OpRxMerge | OpLenInclude | Op3MemWaits);
886                 catc_set_reg(catc, LEDCtrl, LEDLink);
887                 catc_set_reg(catc, RxUnit, RxEnable | RxPolarity | RxMultiCast);
888         } else {
889                 dbg("Performing reset\n");
890                 catc_reset(catc);
891                 catc_get_mac(catc, netdev->dev_addr);
892                 
893                 dbg("Setting RX Mode");
894                 catc->rxmode[0] = RxEnable | RxPolarity | RxMultiCast;
895                 catc->rxmode[1] = 0;
896                 f5u011_rxmode(catc, catc->rxmode);
897         }
898         dbg("Init done.");
899         printk(KERN_INFO "%s: %s USB Ethernet at usb-%s-%s, %pM.\n",
900                netdev->name, (catc->is_f5u011) ? "Belkin F5U011" : "CATC EL1210A NetMate",
901                usbdev->bus->bus_name, usbdev->devpath, netdev->dev_addr);
902         usb_set_intfdata(intf, catc);
903
904         SET_NETDEV_DEV(netdev, &intf->dev);
905         if (register_netdev(netdev) != 0) {
906                 usb_set_intfdata(intf, NULL);
907                 usb_free_urb(catc->ctrl_urb);
908                 usb_free_urb(catc->tx_urb);
909                 usb_free_urb(catc->rx_urb);
910                 usb_free_urb(catc->irq_urb);
911                 free_netdev(netdev);
912                 return -EIO;
913         }
914         return 0;
915 }
916
917 static void catc_disconnect(struct usb_interface *intf)
918 {
919         struct catc *catc = usb_get_intfdata(intf);
920
921         usb_set_intfdata(intf, NULL);
922         if (catc) {
923                 unregister_netdev(catc->netdev);
924                 usb_free_urb(catc->ctrl_urb);
925                 usb_free_urb(catc->tx_urb);
926                 usb_free_urb(catc->rx_urb);
927                 usb_free_urb(catc->irq_urb);
928                 free_netdev(catc->netdev);
929         }
930 }
931
932 /*
933  * Module functions and tables.
934  */
935
936 static struct usb_device_id catc_id_table [] = {
937         { USB_DEVICE(0x0423, 0xa) },    /* CATC Netmate, Belkin F5U011 */
938         { USB_DEVICE(0x0423, 0xc) },    /* CATC Netmate II, Belkin F5U111 */
939         { USB_DEVICE(0x08d1, 0x1) },    /* smartBridges smartNIC */
940         { }
941 };
942
943 MODULE_DEVICE_TABLE(usb, catc_id_table);
944
945 static struct usb_driver catc_driver = {
946         .name =         driver_name,
947         .probe =        catc_probe,
948         .disconnect =   catc_disconnect,
949         .id_table =     catc_id_table,
950 };
951
952 static int __init catc_init(void)
953 {
954         int result = usb_register(&catc_driver);
955         if (result == 0)
956                 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
957                        DRIVER_DESC "\n");
958         return result;
959 }
960
961 static void __exit catc_exit(void)
962 {
963         usb_deregister(&catc_driver);
964 }
965
966 module_init(catc_init);
967 module_exit(catc_exit);