aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/sonic.c
blob: cdc9cc873e067452b75f95b0806863770c887b25 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
/*
 * sonic.c
 *
 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
 * 
 * This driver is based on work from Andreas Busse, but most of
 * the code is rewritten.
 * 
 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
 *
 *    Core code included by system sonic drivers
 */

/*
 * Sources: Olivetti M700-10 Risc Personal Computer hardware handbook,
 * National Semiconductors data sheet for the DP83932B Sonic Ethernet
 * controller, and the files "8390.c" and "skeleton.c" in this directory.
 */



/*
 * Open/initialize the SONIC controller.
 *
 * This routine should set everything up anew at each open, even
 *  registers that "should" only need to be set once at boot, so that
 *  there is non-reboot way to recover if something goes wrong.
 */
static int sonic_open(struct net_device *dev)
{
	if (sonic_debug > 2)
		printk("sonic_open: initializing sonic driver.\n");

	/*
	 * We don't need to deal with auto-irq stuff since we
	 * hardwire the sonic interrupt.
	 */
/*
 * XXX Horrible work around:  We install sonic_interrupt as fast interrupt.
 * This means that during execution of the handler interrupt are disabled
 * covering another bug otherwise corrupting data.  This doesn't mean
 * this glue works ok under all situations.
 */
//    if (sonic_request_irq(dev->irq, &sonic_interrupt, 0, "sonic", dev)) {
	if (sonic_request_irq(dev->irq, &sonic_interrupt, SA_INTERRUPT,
	                      "sonic", dev)) {
		printk("\n%s: unable to get IRQ %d .\n", dev->name, dev->irq);
		return -EAGAIN;
	}

	/*
	 * Initialize the SONIC
	 */
	sonic_init(dev);

	netif_start_queue(dev);

	if (sonic_debug > 2)
		printk("sonic_open: Initialization done.\n");

	return 0;
}


/*
 * Close the SONIC device
 */
static int sonic_close(struct net_device *dev)
{
	unsigned int base_addr = dev->base_addr;

	if (sonic_debug > 2)
		printk("sonic_close\n");

	netif_stop_queue(dev);

	/*
	 * stop the SONIC, disable interrupts
	 */
	SONIC_WRITE(SONIC_ISR, 0x7fff);
	SONIC_WRITE(SONIC_IMR, 0);
	SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);

	sonic_free_irq(dev->irq, dev);	/* release the IRQ */

	return 0;
}

static void sonic_tx_timeout(struct net_device *dev)
{
	struct sonic_local *lp = (struct sonic_local *) dev->priv;
	printk("%s: transmit timed out.\n", dev->name);

	/* Try to restart the adaptor. */
	sonic_init(dev);
	lp->stats.tx_errors++;
	dev->trans_start = jiffies;
	netif_wake_queue(dev);
}

/*
 * transmit packet
 */
static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
{
	struct sonic_local *lp = (struct sonic_local *) dev->priv;
	unsigned int base_addr = dev->base_addr;
	unsigned int laddr;
	int entry, length;

	netif_stop_queue(dev);

	if (sonic_debug > 2)
		printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev);

	/*
	 * Map the packet data into the logical DMA address space
	 */
	if ((laddr = vdma_alloc(CPHYSADDR(skb->data), skb->len)) == ~0UL) {
		printk("%s: no VDMA entry for transmit available.\n",
		       dev->name);
		dev_kfree_skb(skb);
		netif_start_queue(dev);
		return 1;
	}
	entry = lp->cur_tx & SONIC_TDS_MASK;
	lp->tx_laddr[entry] = laddr;
	lp->tx_skb[entry] = skb;

	length = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
	flush_cache_all();

	/*
	 * Setup the transmit descriptor and issue the transmit command.
	 */
	lp->tda[entry].tx_status = 0;	/* clear status */
	lp->tda[entry].tx_frag_count = 1;	/* single fragment */
	lp->tda[entry].tx_pktsize = length;	/* length of packet */
	lp->tda[entry].tx_frag_ptr_l = laddr & 0xffff;
	lp->tda[entry].tx_frag_ptr_h = laddr >> 16;
	lp->tda[entry].tx_frag_size = length;
	lp->cur_tx++;
	lp->stats.tx_bytes += length;

	if (sonic_debug > 2)
		printk("sonic_send_packet: issueing Tx command\n");

	SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);

	dev->trans_start = jiffies;

	if (lp->cur_tx < lp->dirty_tx + SONIC_NUM_TDS)
		netif_start_queue(dev);
	else
		lp->tx_full = 1;

	return 0;
}

/*
 * The typical workload of the driver:
 * Handle the network interface interrupts.
 */
static irqreturn_t sonic_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	struct net_device *dev = (struct net_device *) dev_id;
	unsigned int base_addr = dev->base_addr;
	struct sonic_local *lp;
	int status;

	if (dev == NULL) {
		printk("sonic_interrupt: irq %d for unknown device.\n", irq);
		return IRQ_NONE;
	}

	lp = (struct sonic_local *) dev->priv;

	status = SONIC_READ(SONIC_ISR);
	SONIC_WRITE(SONIC_ISR, 0x7fff);	/* clear all bits */

	if (sonic_debug > 2)
		printk("sonic_interrupt: ISR=%x\n", status);

	if (status & SONIC_INT_PKTRX) {
		sonic_rx(dev);	/* got packet(s) */
	}

	if (status & SONIC_INT_TXDN) {
		int dirty_tx = lp->dirty_tx;

		while (dirty_tx < lp->cur_tx) {
			int entry = dirty_tx & SONIC_TDS_MASK;
			int status = lp->tda[entry].tx_status;

			if (sonic_debug > 3)
				printk
				    ("sonic_interrupt: status %d, cur_tx %d, dirty_tx %d\n",
				     status, lp->cur_tx, lp->dirty_tx);

			if (status == 0) {
				/* It still hasn't been Txed, kick the sonic again */
				SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
				break;
			}

			/* put back EOL and free descriptor */
			lp->tda[entry].tx_frag_count = 0;
			lp->tda[entry].tx_status = 0;

			if (status & 0x0001)
				lp->stats.tx_packets++;
			else {
				lp->stats.tx_errors++;
				if (status & 0x0642)
					lp->stats.tx_aborted_errors++;
				if (status & 0x0180)
					lp->stats.tx_carrier_errors++;
				if (status & 0x0020)
					lp->stats.tx_window_errors++;
				if (status & 0x0004)
					lp->stats.tx_fifo_errors++;
			}

			/* We must free the original skb */
			if (lp->tx_skb[entry]) {
				dev_kfree_skb_irq(lp->tx_skb[entry]);
				lp->tx_skb[entry] = 0;
			}
			/* and the VDMA address */
			vdma_free(lp->tx_laddr[entry]);
			dirty_tx++;
		}

		if (lp->tx_full
		    && dirty_tx + SONIC_NUM_TDS > lp->cur_tx + 2) {
			/* The ring is no longer full, clear tbusy. */
			lp->tx_full = 0;
			netif_wake_queue(dev);
		}

		lp->dirty_tx = dirty_tx;
	}

	/*
	 * check error conditions
	 */
	if (status & SONIC_INT_RFO) {
		printk("%s: receive fifo underrun\n", dev->name);
		lp->stats.rx_fifo_errors++;
	}
	if (status & SONIC_INT_RDE) {
		printk("%s: receive descriptors exhausted\n", dev->name);
		lp->stats.rx_dropped++;
	}
	if (status & SONIC_INT_RBE) {
		printk("%s: receive buffer exhausted\n", dev->name);
		lp->stats.rx_dropped++;
	}
	if (status & SONIC_INT_RBAE) {
		printk("%s: receive buffer area exhausted\n", dev->name);
		lp->stats.rx_dropped++;
	}

	/* counter overruns; all counters are 16bit wide */
	if (status & SONIC_INT_FAE)
		lp->stats.rx_frame_errors += 65536;
	if (status & SONIC_INT_CRC)
		lp->stats.rx_crc_errors += 65536;
	if (status & SONIC_INT_MP)
		lp->stats.rx_missed_errors += 65536;

	/* transmit error */
	if (status & SONIC_INT_TXER)
		lp->stats.tx_errors++;

	/*
	 * clear interrupt bits and return
	 */
	SONIC_WRITE(SONIC_ISR, status);
	return IRQ_HANDLED;
}

/*
 * We have a good packet(s), get it/them out of the buffers.
 */
static void sonic_rx(struct net_device *dev)
{
	unsigned int base_addr = dev->base_addr;
	struct sonic_local *lp = (struct sonic_local *) dev->priv;
	sonic_rd_t *rd = &lp->rda[lp->cur_rx & SONIC_RDS_MASK];
	int status;

	while (rd->in_use == 0) {
		struct sk_buff *skb;
		int pkt_len;
		unsigned char *pkt_ptr;

		status = rd->rx_status;
		if (sonic_debug > 3)
			printk("status %x, cur_rx %d, cur_rra %x\n",
			       status, lp->cur_rx, lp->cur_rra);
		if (status & SONIC_RCR_PRX) {
			pkt_len = rd->rx_pktlen;
			pkt_ptr =
			    (char *)
			    sonic_chiptomem((rd->rx_pktptr_h << 16) +
					    rd->rx_pktptr_l);

			if (sonic_debug > 3)
				printk
				    ("pktptr %p (rba %p) h:%x l:%x, bsize h:%x l:%x\n",
				     pkt_ptr, lp->rba, rd->rx_pktptr_h,
				     rd->rx_pktptr_l,
				     SONIC_READ(SONIC_RBWC1),
				     SONIC_READ(SONIC_RBWC0));

			/* Malloc up new buffer. */
			skb = dev_alloc_skb(pkt_len + 2);
			if (skb == NULL) {
				printk
				    ("%s: Memory squeeze, dropping packet.\n",
				     dev->name);
				lp->stats.rx_dropped++;
				break;
			}
			skb->dev = dev;
			skb_reserve(skb, 2);	/* 16 byte align */
			skb_put(skb, pkt_len);	/* Make room */
			eth_copy_and_sum(skb, pkt_ptr, pkt_len, 0);
			skb->protocol = eth_type_trans(skb, dev);
			netif_rx(skb);	/* pass the packet to upper layers */
			dev->last_rx = jiffies;
			lp->stats.rx_packets++;
			lp->stats.rx_bytes += pkt_len;

		} else {
			/* This should only happen, if we enable accepting broken packets. */
			lp->stats.rx_errors++;
			if (status & SONIC_RCR_FAER)
				lp->stats.rx_frame_errors++;
			if (status & SONIC_RCR_CRCR)
				lp->stats.rx_crc_errors++;
		}

		rd->in_use = 1;
		rd = &lp->rda[(++lp->cur_rx) & SONIC_RDS_MASK];
		/* now give back the buffer to the receive buffer area */
		if (status & SONIC_RCR_LPKT) {
			/*
			 * this was the last packet out of the current receice buffer
			 * give the buffer back to the SONIC
			 */
			lp->cur_rra += sizeof(sonic_rr_t);
			if (lp->cur_rra >
			    (lp->rra_laddr +
			     (SONIC_NUM_RRS -
			      1) * sizeof(sonic_rr_t))) lp->cur_rra =
				    lp->rra_laddr;
			SONIC_WRITE(SONIC_RWP, lp->cur_rra & 0xffff);
		} else
			printk
			    ("%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
			     dev->name);
	}
	/*
	 * If any worth-while packets have been received, dev_rint()
	 * has done a mark_bh(NET_BH) for us and will work on them
	 * when we get to the bottom-half routine.
	 */
}


/*
 * Get the current statistics.
 * This may be called with the device open or closed.
 */
static struct net_device_stats *sonic_get_stats(struct net_device *dev)
{
	struct sonic_local *lp = (struct sonic_local *) dev->priv;
	unsigned int base_addr = dev->base_addr;

	/* read the tally counter from the SONIC and reset them */
	lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
	SONIC_WRITE(SONIC_CRCT, 0xffff);
	lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
	SONIC_WRITE(SONIC_FAET, 0xffff);
	lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
	SONIC_WRITE(SONIC_MPT, 0xffff);

	return &lp->stats;
}


/*
 * Set or clear the multicast filter for this adaptor.
 */
static void sonic_multicast_list(struct net_device *dev)
{
	struct sonic_local *lp = (struct sonic_local *) dev->priv;
	unsigned int base_addr = dev->base_addr;
	unsigned int rcr;
	struct dev_mc_list *dmi = dev->mc_list;
	unsigned char *addr;
	int i;

	rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
	rcr |= SONIC_RCR_BRD;	/* accept broadcast packets */

	if (dev->flags & IFF_PROMISC) {	/* set promiscuous mode */
		rcr |= SONIC_RCR_PRO;
	} else {
		if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15)) {
			rcr |= SONIC_RCR_AMC;
		} else {
			if (sonic_debug > 2)
				printk
				    ("sonic_multicast_list: mc_count %d\n",
				     dev->mc_count);
			lp->cda.cam_enable = 1;	/* always enable our own address */
			for (i = 1; i <= dev->mc_count; i++) {
				addr = dmi->dmi_addr;
				dmi = dmi->next;
				lp->cda.cam_desc[i].cam_cap0 =
				    addr[1] << 8 | addr[0];
				lp->cda.cam_desc[i].cam_cap1 =
				    addr[3] << 8 | addr[2];
				lp->cda.cam_desc[i].cam_cap2 =
				    addr[5] << 8 | addr[4];
				lp->cda.cam_enable |= (1 << i);
			}
			SONIC_WRITE(SONIC_CDC, 16);
			/* issue Load CAM command */
			SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
			SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
		}
	}

	if (sonic_debug > 2)
		printk("sonic_multicast_list: setting RCR=%x\n", rcr);

	SONIC_WRITE(SONIC_RCR, rcr);
}


/*
 * Initialize the SONIC ethernet controller.
 */
static int sonic_init(struct net_device *dev)
{
	unsigned int base_addr = dev->base_addr;
	unsigned int cmd;
	struct sonic_local *lp = (struct sonic_local *) dev->priv;
	unsigned int rra_start;
	unsigned int rra_end;
	int i;

	/*
	 * put the Sonic into software-reset mode and
	 * disable all interrupts
	 */
	SONIC_WRITE(SONIC_ISR, 0x7fff);
	SONIC_WRITE(SONIC_IMR, 0);
	SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);

	/*
	 * clear software reset flag, disable receiver, clear and
	 * enable interrupts, then completely initialize the SONIC
	 */
	SONIC_WRITE(SONIC_CMD, 0);
	SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);

	/*
	 * initialize the receive resource area
	 */
	if (sonic_debug > 2)
		printk("sonic_init: initialize receive resource area\n");

	rra_start = lp->rra_laddr & 0xffff;
	rra_end =
	    (rra_start + (SONIC_NUM_RRS * sizeof(sonic_rr_t))) & 0xffff;

	for (i = 0; i < SONIC_NUM_RRS; i++) {
		lp->rra[i].rx_bufadr_l =
		    (lp->rba_laddr + i * SONIC_RBSIZE) & 0xffff;
		lp->rra[i].rx_bufadr_h =
		    (lp->rba_laddr + i * SONIC_RBSIZE) >> 16;
		lp->rra[i].rx_bufsize_l = SONIC_RBSIZE >> 1;
		lp->rra[i].rx_bufsize_h = 0;
	}

	/* initialize all RRA registers */
	SONIC_WRITE(SONIC_RSA, rra_start);
	SONIC_WRITE(SONIC_REA, rra_end);
	SONIC_WRITE(SONIC_RRP, rra_start);
	SONIC_WRITE(SONIC_RWP, rra_end);
	SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
	SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE - 2) >> 1);

	lp->cur_rra =
	    lp->rra_laddr + (SONIC_NUM_RRS - 1) * sizeof(sonic_rr_t);

	/* load the resource pointers */
	if (sonic_debug > 3)
		printk("sonic_init: issueing RRRA command\n");

	SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
	i = 0;
	while (i++ < 100) {
		if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA)
			break;
	}

	if (sonic_debug > 2)
		printk("sonic_init: status=%x\n", SONIC_READ(SONIC_CMD));

	/*
	 * Initialize the receive descriptors so that they
	 * become a circular linked list, ie. let the last
	 * descriptor point to the first again.
	 */
	if (sonic_debug > 2)
		printk("sonic_init: initialize receive descriptors\n");
	for (i = 0; i < SONIC_NUM_RDS; i++) {
		lp->rda[i].rx_status = 0;
		lp->rda[i].rx_pktlen = 0;
		lp->rda[i].rx_pktptr_l = 0;
		lp->rda[i].rx_pktptr_h = 0;
		lp->rda[i].rx_seqno = 0;
		lp->rda[i].in_use = 1;
		lp->rda[i].link =
		    lp->rda_laddr + (i + 1) * sizeof(sonic_rd_t);
	}
	/* fix last descriptor */
	lp->rda[SONIC_NUM_RDS - 1].link = lp->rda_laddr;
	lp->cur_rx = 0;
	SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
	SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);

	/* 
	 * initialize transmit descriptors
	 */
	if (sonic_debug > 2)
		printk("sonic_init: initialize transmit descriptors\n");
	for (i = 0; i < SONIC_NUM_TDS; i++) {
		lp->tda[i].tx_status = 0;
		lp->tda[i].tx_config = 0;
		lp->tda[i].tx_pktsize = 0;
		lp->tda[i].tx_frag_count = 0;
		lp->tda[i].link =
		    (lp->tda_laddr +
		     (i + 1) * sizeof(sonic_td_t)) | SONIC_END_OF_LINKS;
	}
	lp->tda[SONIC_NUM_TDS - 1].link =
	    (lp->tda_laddr & 0xffff) | SONIC_END_OF_LINKS;

	SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
	SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
	lp->cur_tx = lp->dirty_tx = 0;

	/*
	 * put our own address to CAM desc[0]
	 */
	lp->cda.cam_desc[0].cam_cap0 =
	    dev->dev_addr[1] << 8 | dev->dev_addr[0];
	lp->cda.cam_desc[0].cam_cap1 =
	    dev->dev_addr[3] << 8 | dev->dev_addr[2];
	lp->cda.cam_desc[0].cam_cap2 =
	    dev->dev_addr[5] << 8 | dev->dev_addr[4];
	lp->cda.cam_enable = 1;

	for (i = 0; i < 16; i++)
		lp->cda.cam_desc[i].cam_entry_pointer = i;

	/*
	 * initialize CAM registers
	 */
	SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
	SONIC_WRITE(SONIC_CDC, 16);

	/*
	 * load the CAM
	 */
	SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);

	i = 0;
	while (i++ < 100) {
		if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD)
			break;
	}
	if (sonic_debug > 2) {
		printk("sonic_init: CMD=%x, ISR=%x\n",
		       SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR));
	}

	/*
	 * enable receiver, disable loopback
	 * and enable all interrupts
	 */
	SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP);
	SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
	SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
	SONIC_WRITE(SONIC_ISR, 0x7fff);
	SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);

	cmd = SONIC_READ(SONIC_CMD);
	if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0)
		printk("sonic_init: failed, status=%x\n", cmd);

	if (sonic_debug > 2)
		printk("sonic_init: new status=%x\n",
		       SONIC_READ(SONIC_CMD));

	return 0;
}

MODULE_LICENSE("GPL");