platform/msm_shared/boot_device.c

/* Copyright (c) 2014, The Linux Foundation. All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of The Linux Foundation. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <debug.h>
#include <mmc.h>
#include <ufs.h>
#include <platform/iomap.h>
#include <boot_device.h>

static uint32_t boot_device;

void platform_read_boot_config()
{
	boot_device = BOOT_DEVICE_MASK(readl(BOOT_CONFIG_REG));
}

uint32_t platform_get_boot_dev()
{
	return boot_device;
}

/*
 * Return 1 if boot from emmc else 0
 */
uint32_t platform_boot_dev_isemmc()
{
	uint32_t boot_dev_type;

	boot_dev_type = platform_get_boot_dev();

	if (boot_dev_type == BOOT_EMMC || boot_dev_type == BOOT_DEFAULT)
		boot_dev_type = 1;
	else
		boot_dev_type = 0;

	return boot_dev_type;
}

void platform_boot_dev_cmdline(char *buf)
{
	uint32_t val = 0;
	void *dev;

	dev = target_mmc_device();

	val = platform_get_boot_dev();
	switch(val)
	{
		case BOOT_DEFAULT:
		case BOOT_EMMC:
			sprintf(buf, "%x.sdhci", ((struct mmc_device *)dev)->host.base);
			break;
		case BOOT_UFS:
			sprintf(buf, "%x.ufs", ((struct ufs_dev *)dev)->base);
			break;
		default:
			dprintf(CRITICAL,"ERROR: Unexpected boot_device val=%x",val);
			ASSERT(0);
	};
}