xref: /rk3399_ARM-atf/plat/rockchip/rk3399/drivers/dram/dfs.h (revision 4bd1d3faed7893e8e7d74f82b4b5de7443f434bd)

/*
 * Copyright (c) 2016, ARM Limited and Contributors. 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 ARM 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 HOLDER 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.
 */

#ifndef __SOC_ROCKCHIP_RK3399_DFS_H__
#define __SOC_ROCKCHIP_RK3399_DFS_H__

struct rk3399_sdram_default_config {
	unsigned char bl;
	/* 1:auto precharge, 0:never auto precharge */
	unsigned char ap;
	/* dram driver strength */
	unsigned char dramds;
	/* dram ODT, if odt=0, this parameter invalid */
	unsigned char dramodt;
	/* ca ODT, if odt=0, this parameter invalid
	 * only used by LPDDR4
	 */
	unsigned char caodt;
	unsigned char burst_ref_cnt;
	/* zqcs period, unit(s) */
	unsigned char zqcsi;
};

struct drv_odt_lp_config {
	uint32_t pd_idle;
	uint32_t sr_idle;
	uint32_t sr_mc_gate_idle;
	uint32_t srpd_lite_idle;
	uint32_t standby_idle;
	uint32_t odt_en;

	uint32_t dram_side_drv;
	uint32_t dram_side_dq_odt;
	uint32_t dram_side_ca_odt;
};

uint32_t ddr_set_rate(uint32_t hz);
uint32_t ddr_round_rate(uint32_t hz);
uint32_t ddr_get_rate(void);
uint32_t dram_set_odt_pd(uint32_t arg0, uint32_t arg1, uint32_t arg2);
void dram_dfs_init(void);
void ddr_prepare_for_sys_suspend(void);
void ddr_prepare_for_sys_resume(void);

#endif