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 
catc_rx_done(struct urb * urb)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 
catc_irq_done(struct urb * urb)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 
catc_tx_run(struct catc * catc)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 
catc_tx_done(struct urb * urb)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 
catc_start_xmit(struct sk_buff * skb,struct net_device * netdev)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 
catc_tx_timeout(struct net_device * netdev)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 
catc_ctrl_msg(struct catc * catc,u8 dir,u8 request,u16 value,u16 index,void * buf,int len)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 
catc_ctrl_run(struct catc * catc)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 
catc_ctrl_done(struct urb * urb)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 
catc_ctrl_async(struct catc * catc,u8 dir,u8 request,u16 value,u16 index,void * buf,int len,void (* callback)(struct catc * catc,struct ctrl_queue * q))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 
catc_stats_done(struct catc * catc,struct ctrl_queue * q)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 
catc_stats_timer(unsigned long data)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 
catc_multicast(unsigned char * addr,u8 * multicast)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 
catc_set_multicast_list(struct net_device * netdev)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 
catc_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)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 
catc_get_settings(struct net_device * dev,struct ethtool_cmd * cmd)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 
catc_open(struct net_device * netdev)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 
catc_stop(struct net_device * netdev)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_rx_mode	= 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 
catc_probe(struct usb_interface * intf,const struct usb_device_id * id)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 
catc_disconnect(struct usb_interface * intf)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 module_usb_driver(catc_driver);
953