libata.c

uboot详细解读可用启动引导LINUX2.6内核

/*
 * Copyright (C) 2008 Freescale Semiconductor, Inc.
 *		Dave Liu <[e-mail]>
 *		port from the libata of linux kernel
 *
 * 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 <libata.h>

u64 ata_id_n_sectors(u16 *id)
{
	if (ata_id_has_lba(id)) {
		if (ata_id_has_lba48(id))
			return ata_id_u64(id, ATA_ID_LBA48_SECTORS);
		else
			return ata_id_u32(id, ATA_ID_LBA_SECTORS);
	} else {
		return 0;
	}
}

u32 ata_dev_classify(u32 sig)
{
	u8 lbam, lbah;

	lbam = (sig >> 16) & 0xff;
	lbah = (sig >> 24) & 0xff;

	if (((lbam == 0) && (lbah == 0)) ||
		((lbam == 0x3c) && (lbah == 0xc3)))
		return ATA_DEV_ATA;

	if ((lbam == 0x14) && (lbah == 0xeb))
		return ATA_DEV_ATAPI;

	if ((lbam == 0x69) && (lbah == 0x96))
		return ATA_DEV_PMP;

	return ATA_DEV_UNKNOWN;
}

static void ata_id_string(const u16 *id, unsigned char *s,
			 unsigned int ofs, unsigned int len)
{
	unsigned int c;

	while (len > 0) {
		c = id[ofs] >> 8;
		*s = c;
		s++;

		c = id[ofs] & 0xff;
		*s = c;
		s++;

		ofs++;
		len -= 2;
	}
}

void ata_id_c_string(const u16 *id, unsigned char *s,
			 unsigned int ofs, unsigned int len)
{
	unsigned char *p;

	ata_id_string(id, s, ofs, len - 1);

	p = s + strnlen((char *)s, len - 1);
	while (p > s && p[-1] == ' ')
		p--;
	*p = '\0';
}

void ata_dump_id(u16 *id)
{
	unsigned char serial[ATA_ID_SERNO_LEN + 1];
	unsigned char firmware[ATA_ID_FW_REV_LEN + 1];
	unsigned char product[ATA_ID_PROD_LEN + 1];
	u64 n_sectors;

	/* Serial number */
	ata_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
	printf("S/N: %s\n\r", serial);

	/* Firmware version */
	ata_id_c_string(id, firmware, ATA_ID_FW_REV, sizeof(firmware));
	printf("Firmware version: %s\n\r", firmware);

	/* Product model */
	ata_id_c_string(id, product, ATA_ID_PROD, sizeof(product));
	printf("Product model number: %s\n\r", product);

	/* Total sectors of device  */
	n_sectors = ata_id_n_sectors(id);
	printf("Capablity: %lld sectors\n\r", n_sectors);

	printf ("id[49]: capabilities = 0x%04x\n"
		"id[53]: field valid = 0x%04x\n"
		"id[63]: mwdma = 0x%04x\n"
		"id[64]: pio = 0x%04x\n"
		"id[75]: queue depth = 0x%04x\n",
		id[49],
		id[53],
		id[63],
		id[64],
		id[75]);

	printf ("id[76]: sata capablity = 0x%04x\n"
		"id[78]: sata features supported = 0x%04x\n"
		"id[79]: sata features enable = 0x%04x\n",
		id[76],
		id[78],
		id[79]);

	printf ("id[80]: major version = 0x%04x\n"
		"id[81]: minor version = 0x%04x\n"
		"id[82]: command set supported 1 = 0x%04x\n"
		"id[83]: command set supported 2 = 0x%04x\n"
		"id[84]: command set extension = 0x%04x\n",
		id[80],
		id[81],
		id[82],
		id[83],
		id[84]);
	printf ("id[85]: command set enable 1 = 0x%04x\n"
		"id[86]: command set enable 2 = 0x%04x\n"
		"id[87]: command set default = 0x%04x\n"
		"id[88]: udma = 0x%04x\n"
		"id[93]: hardware reset result = 0x%04x\n",
		id[85],
		id[86],
		id[87],
		id[88],
		id[93]);
}

void ata_swap_buf_le16(u16 *buf, unsigned int buf_words)
{
	unsigned int i;

	for (i = 0; i < buf_words; i++)
		buf[i] = le16_to_cpu(buf[i]);
}