platform/msm_shared/wdog.c

/* Copyright (c) 2015, The Linux Foundation. All rights reserved.

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 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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 */

#include <stdlib.h>
#include <debug.h>
#include <platform.h>
#include <platform/iomap.h>
#include <reg.h>
#include <wdog.h>
#include <target.h>
#include <scm.h>
#include <dload_util.h>

void msm_wdog_init()
{
	uint32_t ret;

	/* Set Bite and Bark times  10s */
	writel(0x77FD3, APPS_WDOG_BARK_VAL_REG);
	writel(0x77FD3, APPS_WDOG_BITE_VAL_REG);

	/* Reset WDOG */
	writel(1, APPS_WDOG_RESET_REG);

	/* Enable WDOG */
	writel((readl(APPS_WDOG_CTL_REG) | 0x1), APPS_WDOG_CTL_REG);

	/* Write to the Boot MISC register to put the device in dload mode*/
	ret = scm_call2_atomic(SCM_SVC_BOOT, SCM_DLOAD_CMD, SCM_DLOAD_MODE, 0);

	if (ret) {
		ret = scm_io_write(TCSR_BOOT_MISC_DETECT,SCM_DLOAD_MODE);
		if(ret) {
			dprintf(CRITICAL, "Failed to write to boot misc: %d\n", ret);
		}
	}
}