summaryrefslogtreecommitdiffstats
path: root/common/cmd_sata.c
blob: bd4c11fd9b7bb1717f53b7adea7d06dde6276f18 (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
/*
 * Copyright (C) Procsys. All rights reserved.
 * Author: Mushtaq Khan <mushtaq_k@procsys.com>
 *			<mushtaqk_921@yahoo.co.in>
 *
 *
 * 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
 *
 * with the reference to libata in kernel 2.4.32
 *
 */

/*
 * File contains SATA read-write and other utility functions.
 */
#include <common.h>
#include <asm/io.h>
#include <pci.h>
#include <command.h>
#include <config.h>
#include <ide.h>
#include <ata.h>

#ifdef CFG_SATA_SUPPORTED
/*For debug prints set macro DEBUG_SATA to 1 */
#define DEBUG_SATA 0
/*Macro for SATA library specific declarations */
#define SATA_DECL
#include <sata.h>
#undef SATA_DECL

static u8 __inline__
sata_inb (unsigned long ioaddr)
{
	return inb (ioaddr);
}

static void __inline__
sata_outb (unsigned char val, unsigned long ioaddr)
{
	outb (val, ioaddr);
}

static void
output_data (struct sata_ioports *ioaddr, ulong * sect_buf, int words)
{
	outsw (ioaddr->data_addr, sect_buf, words << 1);
}

static int
input_data (struct sata_ioports *ioaddr, ulong * sect_buf, int words)
{
	insw (ioaddr->data_addr, sect_buf, words << 1);
	return 0;
}

static void
sata_cpy (unsigned char *dst, unsigned char *src, unsigned int len)
{
	unsigned char *end, *last;

	last = dst;
	end = src + len - 1;

	/* reserve space for '\0' */
	if (len < 2)
		goto OUT;

	/* skip leading white space */
	while ((*src) && (src < end) && (*src == ' '))
		++src;

	/* copy string, omitting trailing white space */
	while ((*src) && (src < end)) {
		*dst++ = *src;
		if (*src++ != ' ')
			last = dst;
	}
      OUT:
	*last = '\0';
}

int
sata_bus_softreset (int num)
{
	u8 dev = 0, status = 0, i;

	port[num].dev_mask = 0;

	for (i = 0; i < CFG_SATA_DEVS_PER_BUS; i++) {
		if (!(sata_devchk (&port[num].ioaddr, i))) {
			PRINTF ("dev_chk failed for dev#%d\n", i);
		} else {
			port[num].dev_mask |= (1 << i);
			PRINTF ("dev_chk passed for dev#%d\n", i);
		}
	}

	if (!(port[num].dev_mask)) {
		printf ("no devices on port%d\n", num);
		return 1;
	}

	dev_select (&port[num].ioaddr, dev);

	port[num].ctl_reg = 0x08;	/*Default value of control reg */
	sata_outb (port[num].ctl_reg, port[num].ioaddr.ctl_addr);
	udelay (10);
	sata_outb (port[num].ctl_reg | ATA_SRST, port[num].ioaddr.ctl_addr);
	udelay (10);
	sata_outb (port[num].ctl_reg, port[num].ioaddr.ctl_addr);

	/* spec mandates ">= 2ms" before checking status.
	 * We wait 150ms, because that was the magic delay used for
	 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
	 * between when the ATA command register is written, and then
	 * status is checked.  Because waiting for "a while" before
	 * checking status is fine, post SRST, we perform this magic
	 * delay here as well.
	 */
	msleep (150);
	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 300);
	while ((status & ATA_BUSY)) {
		msleep (100);
		status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 3);
	}

	if (status & ATA_BUSY)
		printf ("ata%u is slow to respond,plz be patient\n", port);

	while ((status & ATA_BUSY)) {
		msleep (100);
		status = sata_chk_status (&port[num].ioaddr);
	}

	if (status & ATA_BUSY) {
		printf ("ata%u failed to respond : ", port);
		printf ("bus reset failed\n");
		return 1;
	}
	return 0;
}

void
sata_identify (int num, int dev)
{
	u8 cmd = 0, status = 0, devno = num * CFG_SATA_DEVS_PER_BUS + dev;
	u16 iobuf[ATA_SECT_SIZE];
	u64 n_sectors = 0;
	u8 mask = 0;

	memset (iobuf, 0, sizeof (iobuf));
	hd_driveid_t *iop = (hd_driveid_t *) iobuf;

	if (dev == 0)
		mask = 0x01;
	else
		mask = 0x02;

	if (!(port[num].dev_mask & mask)) {
		printf ("dev%d is not present on port#%d\n", dev, num);
		return;
	}

	printf ("port=%d dev=%d\n", num, dev);

	dev_select (&port[num].ioaddr, dev);

	status = 0;
	cmd = ATA_CMD_IDENT;	/*Device Identify Command */
	sata_outb (cmd, port[num].ioaddr.command_addr);
	sata_inb (port[num].ioaddr.altstatus_addr);
	udelay (10);

	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 1000);
	if (status & ATA_ERR) {
		printf ("\ndevice not responding\n");
		port[num].dev_mask &= ~mask;
		return;
	}

	input_data (&port[num].ioaddr, (ulong *) iobuf, ATA_SECTORWORDS);

	PRINTF ("\nata%u: dev %u cfg 49:%04x 82:%04x 83:%04x 84:%04x85:%04x"
		"86:%04x" "87:%04x 88:%04x\n", num, dev, iobuf[49],
		iobuf[82], iobuf[83], iobuf[84], iobuf[85], iobuf[86],
		iobuf[87], iobuf[88]);

	/* we require LBA and DMA support (bits 8 & 9 of word 49) */
	if (!ata_id_has_dma (iobuf) || !ata_id_has_lba (iobuf)) {
		PRINTF ("ata%u: no dma/lba\n", num);
	}
	ata_dump_id (iobuf);

	if (ata_id_has_lba48 (iobuf)) {
		n_sectors = ata_id_u64 (iobuf, 100);
	} else {
		n_sectors = ata_id_u32 (iobuf, 60);
	}
	PRINTF ("no. of sectors %u\n", ata_id_u64 (iobuf, 100));
	PRINTF ("no. of sectors %u\n", ata_id_u32 (iobuf, 60));

	if (n_sectors == 0) {
		port[num].dev_mask &= ~mask;
		return;
	}

	sata_cpy (sata_dev_desc[devno].revision, iop->fw_rev,
		  sizeof (sata_dev_desc[devno].revision));
	sata_cpy (sata_dev_desc[devno].vendor, iop->model,
		  sizeof (sata_dev_desc[devno].vendor));
	sata_cpy (sata_dev_desc[devno].product, iop->serial_no,
		  sizeof (sata_dev_desc[devno].product));
	strswab (sata_dev_desc[devno].revision);
	strswab (sata_dev_desc[devno].vendor);

	if ((iop->config & 0x0080) == 0x0080) {
		sata_dev_desc[devno].removable = 1;
	} else {
		sata_dev_desc[devno].removable = 0;
	}

	sata_dev_desc[devno].lba = iop->lba_capacity;
	PRINTF ("lba=0x%x", sata_dev_desc[devno].lba);

#ifdef CONFIG_LBA48
	if (iop->command_set_2 & 0x0400) {
		sata_dev_desc[devno].lba48 = 1;
		lba = (unsigned long long) iop->lba48_capacity[0] |
		    ((unsigned long long) iop->lba48_capacity[1] << 16) |
		    ((unsigned long long) iop->lba48_capacity[2] << 32) |
		    ((unsigned long long) iop->lba48_capacity[3] << 48);
	} else {
		sata_dev_desc[devno].lba48 = 0;
	}
#endif

	/* assuming HD */
	sata_dev_desc[devno].type = DEV_TYPE_HARDDISK;
	sata_dev_desc[devno].blksz = ATA_BLOCKSIZE;
	sata_dev_desc[devno].lun = 0;	/* just to fill something in... */
}

void
set_Feature_cmd (int num, int dev)
{
	u8 mask = 0x00, status = 0;

	if (dev == 0)
		mask = 0x01;
	else
		mask = 0x02;

	if (!(port[num].dev_mask & mask)) {
		PRINTF ("dev%d is not present on port#%d\n", dev, num);
		return;
	}

	dev_select (&port[num].ioaddr, dev);

	sata_outb (SETFEATURES_XFER, port[num].ioaddr.feature_addr);
	sata_outb (XFER_PIO_4, port[num].ioaddr.nsect_addr);
	sata_outb (0, port[num].ioaddr.lbal_addr);
	sata_outb (0, port[num].ioaddr.lbam_addr);
	sata_outb (0, port[num].ioaddr.lbah_addr);

	sata_outb (ATA_DEVICE_OBS, port[num].ioaddr.device_addr);
	sata_outb (ATA_CMD_SETF, port[num].ioaddr.command_addr);

	udelay (50);
	msleep (150);

	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 5000);
	if ((status & (ATA_STAT_BUSY | ATA_STAT_ERR))) {
		printf ("Error  : status 0x%02x\n", status);
		port[num].dev_mask &= ~mask;
	}
}

void
sata_port (struct sata_ioports *ioport)
{
	ioport->data_addr = ioport->cmd_addr + ATA_REG_DATA;
	ioport->error_addr = ioport->cmd_addr + ATA_REG_ERR;
	ioport->feature_addr = ioport->cmd_addr + ATA_REG_FEATURE;
	ioport->nsect_addr = ioport->cmd_addr + ATA_REG_NSECT;
	ioport->lbal_addr = ioport->cmd_addr + ATA_REG_LBAL;
	ioport->lbam_addr = ioport->cmd_addr + ATA_REG_LBAM;
	ioport->lbah_addr = ioport->cmd_addr + ATA_REG_LBAH;
	ioport->device_addr = ioport->cmd_addr + ATA_REG_DEVICE;
	ioport->status_addr = ioport->cmd_addr + ATA_REG_STATUS;
	ioport->command_addr = ioport->cmd_addr + ATA_REG_CMD;
}

int
sata_devchk (struct sata_ioports *ioaddr, int dev)
{
	u8 nsect, lbal;

	dev_select (ioaddr, dev);

	sata_outb (0x55, ioaddr->nsect_addr);
	sata_outb (0xaa, ioaddr->lbal_addr);

	sata_outb (0xaa, ioaddr->nsect_addr);
	sata_outb (0x55, ioaddr->lbal_addr);

	sata_outb (0x55, ioaddr->nsect_addr);
	sata_outb (0xaa, ioaddr->lbal_addr);

	nsect = sata_inb (ioaddr->nsect_addr);
	lbal = sata_inb (ioaddr->lbal_addr);

	if ((nsect == 0x55) && (lbal == 0xaa))
		return 1;	/* we found a device */
	else
		return 0;	/* nothing found */
}

void
dev_select (struct sata_ioports *ioaddr, int dev)
{
	u8 tmp = 0;

	if (dev == 0)
		tmp = ATA_DEVICE_OBS;
	else
		tmp = ATA_DEVICE_OBS | ATA_DEV1;

	sata_outb (tmp, ioaddr->device_addr);
	sata_inb (ioaddr->altstatus_addr);
	udelay (5);
}

u8
sata_busy_wait (struct sata_ioports *ioaddr, int bits, unsigned int max)
{
	u8 status;

	do {
		udelay (1000);
		status = sata_chk_status (ioaddr);
		max--;
	} while ((status & bits) && (max > 0));

	return status;
}

u8
sata_chk_status (struct sata_ioports * ioaddr)
{
	return sata_inb (ioaddr->status_addr);
}

void
msleep (int count)
{
	int i;

	for (i = 0; i < count; i++)
		udelay (1000);
}

ulong
sata_read (int device, ulong blknr,lbaint_t blkcnt, void * buff)
{
	ulong n = 0, *buffer = (ulong *)buff;
	u8 dev = 0, num = 0, mask = 0, status = 0;

#ifdef CONFIG_LBA48
	unsigned char lba48 = 0;

	if (blknr & 0x0000fffff0000000) {
		if (!sata_dev_desc[devno].lba48) {
			printf ("Drive doesn't support 48-bit addressing\n");
			return 0;
		}
		/* more than 28 bits used, use 48bit mode */
		lba48 = 1;
	}
#endif
	/*Port Number */
	num = device / CFG_SATA_DEVS_PER_BUS;
	/*dev on the port */
	if (device >= CFG_SATA_DEVS_PER_BUS)
		dev = device - CFG_SATA_DEVS_PER_BUS;
	else
		dev = device;

	if (dev == 0)
		mask = 0x01;
	else
		mask = 0x02;

	if (!(port[num].dev_mask & mask)) {
		printf ("dev%d is not present on port#%d\n", dev, num);
		return 0;
	}

	/* Select device */
	dev_select (&port[num].ioaddr, dev);

	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 500);
	if (status & ATA_BUSY) {
		printf ("ata%u failed to respond\n", port[num].port_no);
		return n;
	}
	while (blkcnt-- > 0) {
		status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 500);
		if (status & ATA_BUSY) {
			printf ("ata%u failed to respond\n", 0);
			return n;
		}
#ifdef CONFIG_LBA48
		if (lba48) {
			/* write high bits */
			sata_outb (0, port[num].ioaddr.nsect_addr);
			sata_outb ((blknr >> 24) & 0xFF,
				   port[num].ioaddr.lbal_addr);
			sata_outb ((blknr >> 32) & 0xFF,
				   port[num].ioaddr.lbam_addr);
			sata_outb ((blknr >> 40) & 0xFF,
				   port[num].ioaddr.lbah_addr);
		}
#endif
		sata_outb (1, port[num].ioaddr.nsect_addr);
		sata_outb (((blknr) >> 0) & 0xFF,
			   port[num].ioaddr.lbal_addr);
		sata_outb ((blknr >> 8) & 0xFF, port[num].ioaddr.lbam_addr);
		sata_outb ((blknr >> 16) & 0xFF, port[num].ioaddr.lbah_addr);

#ifdef CONFIG_LBA48
		if (lba48) {
			sata_outb (ATA_LBA, port[num].ioaddr.device_addr);
			sata_outb (ATA_CMD_READ_EXT,
				   port[num].ioaddr.command_addr);
		} else
#endif
		{
			sata_outb (ATA_LBA | ((blknr >> 24) & 0xF),
				   port[num].ioaddr.device_addr);
			sata_outb (ATA_CMD_READ,
				   port[num].ioaddr.command_addr);
		}

		msleep (50);
		/*may take up to 4 sec */
		status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 4000);

		if ((status & (ATA_STAT_DRQ | ATA_STAT_BUSY | ATA_STAT_ERR))
		    != ATA_STAT_DRQ) {
			u8 err = 0;

			printf ("Error no DRQ dev %d blk %ld: sts 0x%02x\n",
				device, (ulong) blknr, status);
			err = sata_inb (port[num].ioaddr.error_addr);
			printf ("Error reg = 0x%x\n", err);
			return (n);
		}
		input_data (&port[num].ioaddr, buffer, ATA_SECTORWORDS);
		sata_inb (port[num].ioaddr.altstatus_addr);
		udelay (50);

		++n;
		++blknr;
		buffer += ATA_SECTORWORDS;
	}
	return n;
}

ulong
sata_write (int device, ulong blknr,lbaint_t blkcnt, void * buff)
{
	ulong n = 0, *buffer = (ulong *)buff;
	unsigned char status = 0, num = 0, dev = 0, mask = 0;

#ifdef CONFIG_LBA48
	unsigned char lba48 = 0;

	if (blknr & 0x0000fffff0000000) {
		if (!sata_dev_desc[devno].lba48) {
			printf ("Drive doesn't support 48-bit addressing\n");
			return 0;
		}
		/* more than 28 bits used, use 48bit mode */
		lba48 = 1;
	}
#endif
	/*Port Number */
	num = device / CFG_SATA_DEVS_PER_BUS;
	/*dev on the Port */
	if (device >= CFG_SATA_DEVS_PER_BUS)
		dev = device - CFG_SATA_DEVS_PER_BUS;
	else
		dev = device;

	if (dev == 0)
		mask = 0x01;
	else
		mask = 0x02;

	/* Select device */
	dev_select (&port[num].ioaddr, dev);

	status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 500);
	if (status & ATA_BUSY) {
		printf ("ata%u failed to respond\n", port[num].port_no);
		return n;
	}

	while (blkcnt-- > 0) {
		status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 500);
		if (status & ATA_BUSY) {
			printf ("ata%u failed to respond\n",
				port[num].port_no);
			return n;
		}
#ifdef CONFIG_LBA48
		if (lba48) {
			/* write high bits */
			sata_outb (0, port[num].ioaddr.nsect_addr);
			sata_outb ((blknr >> 24) & 0xFF,
				   port[num].ioaddr.lbal_addr);
			sata_outb ((blknr >> 32) & 0xFF,
				   port[num].ioaddr.lbam_addr);
			sata_outb ((blknr >> 40) & 0xFF,
				   port[num].ioaddr.lbah_addr);
		}
#endif
		sata_outb (1, port[num].ioaddr.nsect_addr);
		sata_outb ((blknr >> 0) & 0xFF, port[num].ioaddr.lbal_addr);
		sata_outb ((blknr >> 8) & 0xFF, port[num].ioaddr.lbam_addr);
		sata_outb ((blknr >> 16) & 0xFF, port[num].ioaddr.lbah_addr);
#ifdef CONFIG_LBA48
		if (lba48) {
			sata_outb (ATA_LBA, port[num].ioaddr.device_addr);
			sata_outb (ATA_CMD_WRITE_EXT,
				   port[num].ioaddr.command_addr);
		} else
#endif
		{
			sata_outb (ATA_LBA | ((blknr >> 24) & 0xF),
				   port[num].ioaddr.device_addr);
			sata_outb (ATA_CMD_WRITE,
				   port[num].ioaddr.command_addr);
		}

		msleep (50);
		/*may take up to 4 sec */
		status = sata_busy_wait (&port[num].ioaddr, ATA_BUSY, 4000);
		if ((status & (ATA_STAT_DRQ | ATA_STAT_BUSY | ATA_STAT_ERR))
		    != ATA_STAT_DRQ) {
			printf ("Error no DRQ dev %d blk %ld: sts 0x%02x\n",
				device, (ulong) blknr, status);
			return (n);
		}

		output_data (&port[num].ioaddr, buffer, ATA_SECTORWORDS);
		sata_inb (port[num].ioaddr.altstatus_addr);
		udelay (50);

		++n;
		++blknr;
		buffer += ATA_SECTORWORDS;
	}
	return n;
}

block_dev_desc_t *sata_get_dev (int dev);

block_dev_desc_t *
sata_get_dev (int dev)
{
	return ((block_dev_desc_t *) & sata_dev_desc[dev]);
}

int
do_sata (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{

	switch (argc) {
	case 0:
	case 1:
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	case 2:
		if (strncmp (argv[1], "init", 4) == 0) {
			int rcode = 0;

			rcode = init_sata ();
			if (rcode)
				printf ("Sata initialization Failed\n");
			return rcode;
		} else if (strncmp (argv[1], "inf", 3) == 0) {
			int i;

			putc ('\n');
			for (i = 0; i < CFG_SATA_MAXDEVICES; ++i) {
				/*List only known devices */
				if (sata_dev_desc[i].type ==
				    DEV_TYPE_UNKNOWN)
					continue;
				printf ("sata dev %d: ", i);
				dev_print (&sata_dev_desc[i]);
			}
			return 0;
		}
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	case 3:
		if (strcmp (argv[1], "dev") == 0) {
			int dev = (int) simple_strtoul (argv[2], NULL, 10);

			if (dev >= CFG_SATA_MAXDEVICES) {
				printf ("\nSata dev %d not available\n",
					dev);
				return 1;
			}
			printf ("\nSATA dev %d: ", dev);
			dev_print (&sata_dev_desc[dev]);
			if (sata_dev_desc[dev].type == DEV_TYPE_UNKNOWN)
				return 1;
			curr_dev = dev;
			return 0;
		} else if (strcmp (argv[1], "part") == 0) {
			int dev = (int) simple_strtoul (argv[2], NULL, 10);

			if (dev >= CFG_SATA_MAXDEVICES) {
				printf ("\nSata dev %d not available\n",
					dev);
				return 1;
			}
			PRINTF ("\nSATA dev %d: ", dev);
			if (sata_dev_desc[dev].part_type !=
			    PART_TYPE_UNKNOWN) {
				print_part (&sata_dev_desc[dev]);
			} else {
				printf ("\nSata dev %d partition type "
					"unknown\n", dev);
				return 1;
			}
			return 0;
		}
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	default:
		if (argc < 5) {
			printf ("Usage:\n%s\n", cmdtp->usage);
			return 1;
		}
		if (strcmp (argv[1], "read") == 0) {
			ulong addr = simple_strtoul (argv[2], NULL, 16);
			ulong cnt = simple_strtoul (argv[4], NULL, 16);
			ulong n;
			lbaint_t blk = simple_strtoul (argv[3], NULL, 16);

			memset ((int *) addr, 0, cnt * 512);
			printf ("\nSATA read: dev %d blk # %ld,"
				"count %ld ... ", curr_dev, blk, cnt);
			n = sata_read (curr_dev, blk, cnt, (ulong *) addr);
			/* flush cache after read */
			flush_cache (addr, cnt * 512);
			printf ("%ld blocks read: %s\n", n,
				(n == cnt) ? "OK" : "ERR");
			if (n == cnt)
				return 1;
			else
				return 0;
		} else if (strcmp (argv[1], "write") == 0) {
			ulong addr = simple_strtoul (argv[2], NULL, 16);
			ulong cnt = simple_strtoul (argv[4], NULL, 16);
			ulong n;
			lbaint_t blk = simple_strtoul (argv[3], NULL, 16);

			printf ("\nSata write: dev %d blk # %ld,"
				"count %ld ... ", curr_dev, blk, cnt);
			n = sata_write (curr_dev, blk, cnt, (ulong *) addr);
			printf ("%ld blocks written: %s\n", n,
				(n == cnt) ? "OK" : "ERR");
			if (n == cnt)
				return 1;
			else
				return 0;
		} else {
			printf ("Usage:\n%s\n", cmdtp->usage);
			return 1;
		}
	}			/*End OF SWITCH */
}

U_BOOT_CMD (sata, 5, 1, do_sata,
	    "sata init\n"
	    "sata info\n"
	    "sata part device\n"
	    "sata dev device\n"
	    "sata read  addr blk# cnt\n"
	    "sata write  addr blk# cnt\n", "cmd for init,rw and dev-info\n");

#endif
OpenPOWER on IntegriCloud