drivers/firmware/qcom_scm.c

/* Copyright (c) 2010,2015, The Linux Foundation. All rights reserved.
 * Copyright (C) 2015 Linaro Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include <linux/cpumask.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/qcom_scm.h>

#include "qcom_scm.h"

/**
 * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
 * @entry: Entry point function for the cpus
 * @cpus: The cpumask of cpus that will use the entry point
 *
 * Set the cold boot address of the cpus. Any cpu outside the supported
 * range would be removed from the cpu present mask.
 */
int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus)
{
	return __qcom_scm_set_cold_boot_addr(entry, cpus);
}
EXPORT_SYMBOL(qcom_scm_set_cold_boot_addr);

/**
 * qcom_scm_set_warm_boot_addr() - Set the warm boot address for cpus
 * @entry: Entry point function for the cpus
 * @cpus: The cpumask of cpus that will use the entry point
 *
 * Set the Linux entry point for the SCM to transfer control to when coming
 * out of a power down. CPU power down may be executed on cpuidle or hotplug.
 */
int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus)
{
	return __qcom_scm_set_warm_boot_addr(entry, cpus);
}
EXPORT_SYMBOL(qcom_scm_set_warm_boot_addr);

/**
 * qcom_scm_cpu_power_down() - Power down the cpu
 * @flags - Flags to flush cache
 *
 * This is an end point to power down cpu. If there was a pending interrupt,
 * the control would return from this function, otherwise, the cpu jumps to the
 * warm boot entry point set for this cpu upon reset.
 */
void qcom_scm_cpu_power_down(u32 flags)
{
	__qcom_scm_cpu_power_down(flags);
}
EXPORT_SYMBOL(qcom_scm_cpu_power_down);

/**
 * qcom_scm_hdcp_available() - Check if secure environment supports HDCP.
 *
 * Return true if HDCP is supported, false if not.
 */
bool qcom_scm_hdcp_available(void)
{
	int ret;

	ret = __qcom_scm_is_call_available(QCOM_SCM_SVC_HDCP,
		QCOM_SCM_CMD_HDCP);

	return (ret > 0) ? true : false;
}
EXPORT_SYMBOL(qcom_scm_hdcp_available);

/**
 * qcom_scm_hdcp_req() - Send HDCP request.
 * @req: HDCP request array
 * @req_cnt: HDCP request array count
 * @resp: response buffer passed to SCM
 *
 * Write HDCP register(s) through SCM.
 */
int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp)
{
	return __qcom_scm_hdcp_req(req, req_cnt, resp);
}
EXPORT_SYMBOL(qcom_scm_hdcp_req);