src/platform/intel/include/platform/cavs/pm_runtime.h

/*
 * Copyright (c) 2018, Intel Corporation
 * 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 Intel Corporation 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * 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, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * Author: Tomasz Lauda <tomasz.lauda@linux.intel.com>
 */

/**
 * \file platform/intel/platform/cavs/include/pm_runtime.h
 * \brief Runtime power management header file for cAVS
 * \author Tomasz Lauda <tomasz.lauda@linux.intel.com>
 */

#ifndef __INCLUDE_CAVS_PM_RUNTIME__
#define __INCLUDE_CAVS_PM_RUNTIME__

#include <platform/pm_runtime.h>

extern struct pm_runtime_data *_prd;

/**
 * \brief Forces Host DMAs to exit L1.
 */
static inline void cavs_pm_runtime_force_host_dma_l1_exit(void)
{
	uint32_t flags;

	spin_lock_irq(&_prd->lock, flags);

	if (!(shim_read(SHIM_SVCFG) & SHIM_SVCFG_FORCE_L1_EXIT)) {
		shim_write(SHIM_SVCFG,
			   shim_read(SHIM_SVCFG) | SHIM_SVCFG_FORCE_L1_EXIT);

		wait_delay(PLATFORM_FORCE_L1_EXIT_TIME);

		shim_write(SHIM_SVCFG,
			   shim_read(SHIM_SVCFG) & ~(SHIM_SVCFG_FORCE_L1_EXIT));
	}

	spin_unlock_irq(&_prd->lock, flags);
}
#endif /* __INCLUDE_CAVS_PM_RUNTIME__ */