summaryrefslogtreecommitdiff
path: root/board/bc3450/cmd_bc3450.c
blob: aa46e5812f2baba4adb80aabf65c9e37cac0ba7e (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
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
/*
 * (C) Copyright 2005
 * Stefan Strobl, GERSYS GmbH, stefan.strobl@gersys.de
 *
 * (C) Copyright 2005
 * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <command.h>

/*
 * BC3450 specific commands
 */
#if defined(CONFIG_CMD_BSP)

#undef DEBUG
#ifdef DEBUG
# define dprintf(fmt,args...)	printf(fmt, ##args)
#else
# define dprintf(fmt,args...)
#endif

/*
 * Definitions for DS1620 chip
 */
#define THERM_START_CONVERT	0xee
#define THERM_RESET		0xaf
#define THERM_READ_CONFIG	0xac
#define THERM_READ_TEMP		0xaa
#define THERM_READ_TL		0xa2
#define THERM_READ_TH		0xa1
#define THERM_WRITE_CONFIG	0x0c
#define THERM_WRITE_TL		0x02
#define THERM_WRITE_TH		0x01

#define CONFIG_SYS_CPU			2
#define CONFIG_SYS_1SHOT		1
#define CONFIG_SYS_STANDALONE		0

struct therm {
	int hi;
	int lo;
};

/*
 * SM501 Register
 */
#define SM501_GPIO_CTRL_LOW		0x00000008UL	/* gpio pins 0..31  */
#define SM501_GPIO_CTRL_HIGH		0x0000000CUL	/* gpio pins 32..63 */
#define SM501_POWER_MODE0_GATE		0x00000040UL
#define SM501_POWER_MODE1_GATE		0x00000048UL
#define POWER_MODE_GATE_GPIO_PWM_I2C	0x00000040UL
#define SM501_GPIO_DATA_LOW		0x00010000UL
#define SM501_GPIO_DATA_HIGH		0x00010004UL
#define SM501_GPIO_DATA_DIR_LOW		0x00010008UL
#define SM501_GPIO_DATA_DIR_HIGH	0x0001000CUL
#define SM501_PANEL_DISPLAY_CONTROL	0x00080000UL
#define SM501_CRT_DISPLAY_CONTROL	0x00080200UL

/* SM501 CRT Display Control Bits */
#define SM501_CDC_SEL			(1 << 9)
#define SM501_CDC_TE			(1 << 8)
#define SM501_CDC_E			(1 << 2)

/* SM501 Panel Display Control Bits */
#define SM501_PDC_FPEN			(1 << 27)
#define SM501_PDC_BIAS			(1 << 26)
#define SM501_PDC_DATA			(1 << 25)
#define SM501_PDC_VDDEN			(1 << 24)

/* SM501 GPIO Data LOW Bits */
#define SM501_GPIO24			0x01000000
#define SM501_GPIO25			0x02000000
#define SM501_GPIO26			0x04000000
#define SM501_GPIO27			0x08000000
#define SM501_GPIO28			0x10000000
#define SM501_GPIO29			0x20000000
#define SM501_GPIO30			0x40000000
#define SM501_GPIO31			0x80000000

/* SM501 GPIO Data HIGH Bits */
#define SM501_GPIO46			0x00004000
#define SM501_GPIO47			0x00008000
#define SM501_GPIO48			0x00010000
#define SM501_GPIO49			0x00020000
#define SM501_GPIO50			0x00040000
#define SM501_GPIO51			0x00080000

/* BC3450 GPIOs @ SM501 Data LOW */
#define DIP				(SM501_GPIO24 | SM501_GPIO25 | SM501_GPIO26 | SM501_GPIO27)
#define DS1620_DQ			SM501_GPIO29	/* I/O             */
#define DS1620_CLK			SM501_GPIO30	/* High active O/P */
#define DS1620_RES			SM501_GPIO31	/* Low active O/P  */
/* BC3450 GPIOs @ SM501 Data HIGH */
#define BUZZER				SM501_GPIO47	/* Low active O/P  */
#define DS1620_TLOW			SM501_GPIO48	/* High active I/P */
#define PWR_OFF				SM501_GPIO49	/* Low active O/P  */
#define FP_DATA_TRI			SM501_GPIO50	/* High active O/P */


/*
 * Initialise GPIO on SM501
 *
 * This function may be called from several other functions.
 * Yet, the initialisation sequence is executed only the first
 * time the function is called.
 */
int sm501_gpio_init (void)
{
	static int init_done = 0;

	if (init_done) {
/*	dprintf("sm501_gpio_init: nothing to be done.\n"); */
		return 1;
	}

	/* enable SM501 GPIO control (in both power modes) */
	*(vu_long *) (SM501_MMIO_BASE + SM501_POWER_MODE0_GATE) |=
		POWER_MODE_GATE_GPIO_PWM_I2C;
	*(vu_long *) (SM501_MMIO_BASE + SM501_POWER_MODE1_GATE) |=
		POWER_MODE_GATE_GPIO_PWM_I2C;

	/* set up default O/Ps */
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
		~(DS1620_RES | DS1620_CLK);
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |= DS1620_DQ;
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
		~(FP_DATA_TRI);
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) |=
		(BUZZER | PWR_OFF);

	/* configure directions for SM501 GPIO pins */
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_CTRL_LOW) &= ~(0xFF << 24);
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_CTRL_HIGH) &=
		~(0x3F << 14);
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) &=
		~(DIP | DS1620_DQ);
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) |=
		(DS1620_RES | DS1620_CLK);
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_HIGH) &=
		~DS1620_TLOW;
	*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_HIGH) |=
		(PWR_OFF | BUZZER | FP_DATA_TRI);

	init_done = 1;
/*  dprintf("sm501_gpio_init: done.\n"); */
	return 0;
}


/*
 * dip - read Config Inputs
 *
 * read and prints the dip switch
 * and/or external config inputs (4bits) 0...0x0F
 */
int cmd_dip (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	vu_long rc = 0;

	sm501_gpio_init ();

	/* read dip switch */
	rc = *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW);
	rc = ~rc;
	rc &= DIP;
	rc = (int) (rc >> 24);

	/* plausibility check */
	if (rc > 0x0F)
		return -1;

	printf ("0x%lx\n", rc);
	return 0;
}

U_BOOT_CMD (dip, 1, 1, cmd_dip,
	    "read dip switch and config inputs",
	    "\n"
	    "     - prints the state of the dip switch and/or\n"
	    "       external configuration inputs as hex value.\n"
	    "     - \"Config 1\" is the LSB\n");


/*
 * buz - turns Buzzer on/off
 */
#ifdef CONFIG_BC3450_BUZZER
static int cmd_buz (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	if (argc != 2) {
		printf ("Usage:\nspecify one argument: \"on\" or \"off\"\n");
		return 1;
	}

	sm501_gpio_init ();

	if (strncmp (argv[1], "on", 2) == 0) {
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
			~(BUZZER);
		return 0;
	} else if (strncmp (argv[1], "off", 3) == 0) {
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) |=
			BUZZER;
		return 0;
	}
	printf ("Usage:\nspecify one argument: \"on\" or \"off\"\n");
	return 1;
}

U_BOOT_CMD (buz, 2, 1, cmd_buz,
	    "turns buzzer on/off",
	    "\n" "buz <on/off>\n" "     - turns the buzzer on or off\n");
#endif /* CONFIG_BC3450_BUZZER */


/*
 * fp - front panel commands
 */
static int cmd_fp (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	sm501_gpio_init ();

	if (strncmp (argv[1], "on", 2) == 0) {
		/* turn on VDD first */
		*(vu_long *) (SM501_MMIO_BASE +
			      SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_VDDEN;
		udelay (1000);
		/* then put data on */
		*(vu_long *) (SM501_MMIO_BASE +
			      SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_DATA;
		/* wait some time and enable backlight */
		udelay (1000);
		*(vu_long *) (SM501_MMIO_BASE +
			      SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_BIAS;
		udelay (1000);
		*(vu_long *) (SM501_MMIO_BASE +
			      SM501_PANEL_DISPLAY_CONTROL) |= SM501_PDC_FPEN;
		return 0;
	} else if (strncmp (argv[1], "off", 3) == 0) {
		/* turn off the backlight first */
		*(vu_long *) (SM501_MMIO_BASE +
			      SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_FPEN;
		udelay (1000);
		*(vu_long *) (SM501_MMIO_BASE +
			      SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_BIAS;
		udelay (200000);
		/* wait some time, then remove data */
		*(vu_long *) (SM501_MMIO_BASE +
			      SM501_PANEL_DISPLAY_CONTROL) &= ~SM501_PDC_DATA;
		udelay (1000);
		/* and remove VDD last */
		*(vu_long *) (SM501_MMIO_BASE +
			      SM501_PANEL_DISPLAY_CONTROL) &=
			~SM501_PDC_VDDEN;
		return 0;
	} else if (strncmp (argv[1], "bl", 2) == 0) {
		/* turn on/off backlight only */
		if (strncmp (argv[2], "on", 2) == 0) {
			*(vu_long *) (SM501_MMIO_BASE +
				      SM501_PANEL_DISPLAY_CONTROL) |=
				SM501_PDC_BIAS;
			udelay (1000);
			*(vu_long *) (SM501_MMIO_BASE +
				      SM501_PANEL_DISPLAY_CONTROL) |=
				SM501_PDC_FPEN;
			return 0;
		} else if (strncmp (argv[2], "off", 3) == 0) {
			*(vu_long *) (SM501_MMIO_BASE +
				      SM501_PANEL_DISPLAY_CONTROL) &=
				~SM501_PDC_FPEN;
			udelay (1000);
			*(vu_long *) (SM501_MMIO_BASE +
				      SM501_PANEL_DISPLAY_CONTROL) &=
				~SM501_PDC_BIAS;
			return 0;
		}
	}
#ifdef CONFIG_BC3450_CRT
	else if (strncmp (argv[1], "crt", 3) == 0) {
		/* enables/disables the crt output (debug only) */
		if (strncmp (argv[2], "on", 2) == 0) {
			*(vu_long *) (SM501_MMIO_BASE +
				      SM501_CRT_DISPLAY_CONTROL) |=
				(SM501_CDC_TE | SM501_CDC_E);
			*(vu_long *) (SM501_MMIO_BASE +
				      SM501_CRT_DISPLAY_CONTROL) &=
				~SM501_CDC_SEL;
			return 0;
		} else if (strncmp (argv[2], "off", 3) == 0) {
			*(vu_long *) (SM501_MMIO_BASE +
				      SM501_CRT_DISPLAY_CONTROL) &=
				~(SM501_CDC_TE | SM501_CDC_E);
			*(vu_long *) (SM501_MMIO_BASE +
				      SM501_CRT_DISPLAY_CONTROL) |=
				SM501_CDC_SEL;
			return 0;
		}
	}
#endif /* CONFIG_BC3450_CRT */
	printf ("Usage:%s\n", cmdtp->help);
	return 1;
}

U_BOOT_CMD (fp, 3, 1, cmd_fp,
	    "front panes access functions",
	    "\n"
	    "fp bl <on/off>\n"
	    "     - turns the CCFL backlight of the display on/off\n"
	    "fp <on/off>\n" "     - turns the whole display on/off\n"
#ifdef CONFIG_BC3450_CRT
	    "fp crt <on/off>\n"
	    "     - enables/disables the crt output (debug only)\n"
#endif /* CONFIG_BC3450_CRT */
	);


/*
 * temp - DS1620 thermometer
 */
/* GERSYS BC3450 specific functions */
static inline void bc_ds1620_set_clk (int clk)
{
	if (clk)
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |=
			DS1620_CLK;
	else
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
			~DS1620_CLK;
}

static inline void bc_ds1620_set_data (int dat)
{
	if (dat)
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |=
			DS1620_DQ;
	else
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &=
			~DS1620_DQ;
}

static inline int bc_ds1620_get_data (void)
{
	vu_long rc;

	rc = *(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW);
	rc &= DS1620_DQ;
	if (rc != 0)
		rc = 1;
	return (int) rc;
}

static inline void bc_ds1620_set_data_dir (int dir)
{
	if (dir)		/* in */
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) &= ~DS1620_DQ;
	else			/* out */
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_DIR_LOW) |= DS1620_DQ;
}

static inline void bc_ds1620_set_reset (int res)
{
	if (res)
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) |= DS1620_RES;
	else
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_LOW) &= ~DS1620_RES;
}

/* hardware independent functions */
static void ds1620_send_bits (int nr, int value)
{
	int i;

	for (i = 0; i < nr; i++) {
		bc_ds1620_set_data (value & 1);
		bc_ds1620_set_clk (0);
		udelay (1);
		bc_ds1620_set_clk (1);
		udelay (1);

		value >>= 1;
	}
}

static unsigned int ds1620_recv_bits (int nr)
{
	unsigned int value = 0, mask = 1;
	int i;

	bc_ds1620_set_data (0);

	for (i = 0; i < nr; i++) {
		bc_ds1620_set_clk (0);
		udelay (1);

		if (bc_ds1620_get_data ())
			value |= mask;

		mask <<= 1;

		bc_ds1620_set_clk (1);
		udelay (1);
	}

	return value;
}

static void ds1620_out (int cmd, int bits, int value)
{
	bc_ds1620_set_clk (1);
	bc_ds1620_set_data_dir (0);

	bc_ds1620_set_reset (0);
	udelay (1);
	bc_ds1620_set_reset (1);

	udelay (1);

	ds1620_send_bits (8, cmd);
	if (bits)
		ds1620_send_bits (bits, value);

	udelay (1);

	/* go stand alone */
	bc_ds1620_set_data_dir (1);
	bc_ds1620_set_reset (0);
	bc_ds1620_set_clk (0);

	udelay (10000);
}

static unsigned int ds1620_in (int cmd, int bits)
{
	unsigned int value;

	bc_ds1620_set_clk (1);
	bc_ds1620_set_data_dir (0);

	bc_ds1620_set_reset (0);
	udelay (1);
	bc_ds1620_set_reset (1);

	udelay (1);

	ds1620_send_bits (8, cmd);

	bc_ds1620_set_data_dir (1);
	value = ds1620_recv_bits (bits);

	/* go stand alone */
	bc_ds1620_set_data_dir (1);
	bc_ds1620_set_reset (0);
	bc_ds1620_set_clk (0);

	return value;
}

static int cvt_9_to_int (unsigned int val)
{
	if (val & 0x100)
		val |= 0xfffffe00;

	return val;
}

/* set thermostate thresholds */
static void ds1620_write_state (struct therm *therm)
{
	ds1620_out (THERM_WRITE_TL, 9, therm->lo);
	ds1620_out (THERM_WRITE_TH, 9, therm->hi);
	ds1620_out (THERM_START_CONVERT, 0, 0);
}

static int cmd_temp (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	int i;
	struct therm therm;

	sm501_gpio_init ();

	/* print temperature */
	if (argc == 1) {
		i = cvt_9_to_int (ds1620_in (THERM_READ_TEMP, 9));
		printf ("%d.%d C\n", i >> 1, i & 1 ? 5 : 0);
		return 0;
	}

	/* set to default operation */
	if (strncmp (argv[1], "set", 3) == 0) {
		if (strncmp (argv[2], "default", 3) == 0) {
			therm.hi = +88;
			therm.lo = -20;
			therm.hi <<= 1;
			therm.lo <<= 1;
			ds1620_write_state (&therm);
			ds1620_out (THERM_WRITE_CONFIG, 8, CONFIG_SYS_STANDALONE);
			return 0;
		}
	}

	printf ("Usage:%s\n", cmdtp->help);
	return 1;
}

U_BOOT_CMD (temp, 3, 1, cmd_temp,
	    "print current temperature",
	    "\n" "temp\n" "     - print current temperature\n");

#ifdef CONFIG_BC3450_CAN
/*
 * Initialise CAN interface
 *
 * return 1 on CAN initialization failure
 * return 0 if no failure
 */
int can_init (void)
{
	static int init_done = 0;
	int i;
	struct mpc5xxx_mscan *can1 =
		(struct mpc5xxx_mscan *) (CONFIG_SYS_MBAR + 0x0900);
	struct mpc5xxx_mscan *can2 =
		(struct mpc5xxx_mscan *) (CONFIG_SYS_MBAR + 0x0980);

	/* GPIO configuration of the CAN pins is done in BC3450.h */

	if (!init_done) {
		/* init CAN 1 */
		can1->canctl1 |= 0x80;	/* CAN enable */
		udelay (100);

		i = 0;
		can1->canctl0 |= 0x02;	/* sleep mode */
		/* wait until sleep mode reached */
		while (!(can1->canctl1 & 0x02)) {
			udelay (10);
			i++;
			if (i == 10) {
				printf ("%s: CAN1 initialize error, "
					"can not enter sleep mode!\n",
					__FUNCTION__);
				return 1;
			}
		}
		i = 0;
		can1->canctl0 = 0x01;	/* enter init mode */
		/* wait until init mode reached */
		while (!(can1->canctl1 & 0x01)) {
			udelay (10);
			i++;
			if (i == 10) {
				printf ("%s: CAN1 initialize error, "
					"can not enter init mode!\n",
					__FUNCTION__);
				return 1;
			}
		}
		can1->canctl1 = 0x80;
		can1->canctl1 |= 0x40;
		can1->canbtr0 = 0x0F;
		can1->canbtr1 = 0x7F;
		can1->canidac &= ~(0x30);
		can1->canidar1 = 0x00;
		can1->canidar3 = 0x00;
		can1->canidar5 = 0x00;
		can1->canidar7 = 0x00;
		can1->canidmr0 = 0xFF;
		can1->canidmr1 = 0xFF;
		can1->canidmr2 = 0xFF;
		can1->canidmr3 = 0xFF;
		can1->canidmr4 = 0xFF;
		can1->canidmr5 = 0xFF;
		can1->canidmr6 = 0xFF;
		can1->canidmr7 = 0xFF;

		i = 0;
		can1->canctl0 &= ~(0x01);	/* leave init mode */
		can1->canctl0 &= ~(0x02);
		/* wait until init and sleep mode left */
		while ((can1->canctl1 & 0x01) || (can1->canctl1 & 0x02)) {
			udelay (10);
			i++;
			if (i == 10) {
				printf ("%s: CAN1 initialize error, "
					"can not leave init/sleep mode!\n",
					__FUNCTION__);
				return 1;
			}
		}

		/* init CAN 2 */
		can2->canctl1 |= 0x80;	/* CAN enable */
		udelay (100);

		i = 0;
		can2->canctl0 |= 0x02;	/* sleep mode */
		/* wait until sleep mode reached */
		while (!(can2->canctl1 & 0x02)) {
			udelay (10);
			i++;
			if (i == 10) {
				printf ("%s: CAN2 initialize error, "
					"can not enter sleep mode!\n",
					__FUNCTION__);
				return 1;
			}
		}
		i = 0;
		can2->canctl0 = 0x01;	/* enter init mode */
		/* wait until init mode reached */
		while (!(can2->canctl1 & 0x01)) {
			udelay (10);
			i++;
			if (i == 10) {
				printf ("%s: CAN2 initialize error, "
					"can not enter init mode!\n",
					__FUNCTION__);
				return 1;
			}
		}
		can2->canctl1 = 0x80;
		can2->canctl1 |= 0x40;
		can2->canbtr0 = 0x0F;
		can2->canbtr1 = 0x7F;
		can2->canidac &= ~(0x30);
		can2->canidar1 = 0x00;
		can2->canidar3 = 0x00;
		can2->canidar5 = 0x00;
		can2->canidar7 = 0x00;
		can2->canidmr0 = 0xFF;
		can2->canidmr1 = 0xFF;
		can2->canidmr2 = 0xFF;
		can2->canidmr3 = 0xFF;
		can2->canidmr4 = 0xFF;
		can2->canidmr5 = 0xFF;
		can2->canidmr6 = 0xFF;
		can2->canidmr7 = 0xFF;
		can2->canctl0 &= ~(0x01);	/* leave init mode */
		can2->canctl0 &= ~(0x02);

		i = 0;
		/* wait until init mode left */
		while ((can2->canctl1 & 0x01) || (can2->canctl1 & 0x02)) {
			udelay (10);
			i++;
			if (i == 10) {
				printf ("%s: CAN2 initialize error, "
					"can not leave init/sleep mode!\n",
					__FUNCTION__);
				return 1;
			}
		}
		init_done = 1;
	}
	return 0;
}

/*
 * Do CAN test
 * by sending message between CAN1 and CAN2
 *
 * return 1 on CAN failure
 * return 0 if no failure
 */
int do_can (char *argv[])
{
	int i;
	struct mpc5xxx_mscan *can1 =
		(struct mpc5xxx_mscan *) (CONFIG_SYS_MBAR + 0x0900);
	struct mpc5xxx_mscan *can2 =
		(struct mpc5xxx_mscan *) (CONFIG_SYS_MBAR + 0x0980);

	/* send a message on CAN1 */
	can1->cantbsel = 0x01;
	can1->cantxfg.idr[0] = 0x55;
	can1->cantxfg.idr[1] = 0x00;
	can1->cantxfg.idr[1] &= ~0x8;
	can1->cantxfg.idr[1] &= ~0x10;
	can1->cantxfg.dsr[0] = 0xCC;
	can1->cantxfg.dlr = 1;
	can1->cantxfg.tbpr = 0;
	can1->cantflg = 0x01;

	i = 0;
	while ((can1->cantflg & 0x01) == 0) {
		i++;
		if (i == 10) {
			printf ("%s: CAN1 send timeout, "
				"can not send message!\n", __FUNCTION__);
			return 1;
		}
		udelay (1000);
	}
	udelay (1000);

	i = 0;
	while (!(can2->canrflg & 0x01)) {
		i++;
		if (i == 10) {
			printf ("%s: CAN2 receive timeout, "
				"no message received!\n", __FUNCTION__);
			return 1;
		}
		udelay (1000);
	}

	if (can2->canrxfg.dsr[0] != 0xCC) {
		printf ("%s: CAN2 receive error, "
			"data mismatch!\n", __FUNCTION__);
		return 1;
	}

	/* send a message on CAN2 */
	can2->cantbsel = 0x01;
	can2->cantxfg.idr[0] = 0x55;
	can2->cantxfg.idr[1] = 0x00;
	can2->cantxfg.idr[1] &= ~0x8;
	can2->cantxfg.idr[1] &= ~0x10;
	can2->cantxfg.dsr[0] = 0xCC;
	can2->cantxfg.dlr = 1;
	can2->cantxfg.tbpr = 0;
	can2->cantflg = 0x01;

	i = 0;
	while ((can2->cantflg & 0x01) == 0) {
		i++;
		if (i == 10) {
			printf ("%s: CAN2 send error, "
				"can not send message!\n", __FUNCTION__);
			return 1;
		}
		udelay (1000);
	}
	udelay (1000);

	i = 0;
	while (!(can1->canrflg & 0x01)) {
		i++;
		if (i == 10) {
			printf ("%s: CAN1 receive timeout, "
				"no message received!\n", __FUNCTION__);
			return 1;
		}
		udelay (1000);
	}

	if (can1->canrxfg.dsr[0] != 0xCC) {
		printf ("%s: CAN1 receive error 0x%02x\n",
			__FUNCTION__, (can1->canrxfg.dsr[0]));
		return 1;
	}

	return 0;
}
#endif /* CONFIG_BC3450_CAN */

/*
 * test - BC3450 HW test routines
 */
int cmd_test (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
#ifdef CONFIG_BC3450_CAN
	int rcode;

	can_init ();
#endif /* CONFIG_BC3450_CAN */

	sm501_gpio_init ();

	if (argc != 2) {
		printf ("Usage:%s\n", cmdtp->help);
		return 1;
	}

	if (strncmp (argv[1], "unit-off", 8) == 0) {
		printf ("waiting 2 seconds...\n");
		udelay (2000000);
		*(vu_long *) (SM501_MMIO_BASE + SM501_GPIO_DATA_HIGH) &=
			~PWR_OFF;
		return 0;
	}
#ifdef CONFIG_BC3450_CAN
	else if (strncmp (argv[1], "can", 2) == 0) {
		rcode = do_can (argv);
		if (simple_strtoul (argv[2], NULL, 10) == 2) {
			if (rcode == 0)
				printf ("OK\n");
			else
				printf ("Error\n");
		}
		return rcode;
	}
#endif /* CONFIG_BC3450_CAN */

	printf ("Usage:%s\n", cmdtp->help);
	return 1;
}

U_BOOT_CMD (test, 2, 1, cmd_test, "unit test routines", "\n"
#ifdef CONFIG_BC3450_CAN
	    "test can\n"
	    "     - connect CAN1 (X8) with CAN2 (X9) for this test\n"
#endif /* CONFIG_BC3450_CAN */
	    "test unit-off\n"
	    "     - turns off the BC3450 unit\n"
	    "       WARNING: Unsaved environment variables will be lost!\n");
#endif