1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef DFS_H 8 #define DFS_H 9 10 #include <stdint.h> 11 12 struct rk3399_sdram_default_config { 13 unsigned char bl; 14 /* 1:auto precharge, 0:never auto precharge */ 15 unsigned char ap; 16 /* dram driver strength */ 17 unsigned char dramds; 18 /* dram ODT, if odt=0, this parameter invalid */ 19 unsigned char dramodt; 20 /* ca ODT, if odt=0, this parameter invalid 21 * only used by LPDDR4 22 */ 23 unsigned char caodt; 24 unsigned char burst_ref_cnt; 25 /* zqcs period, unit(s) */ 26 unsigned char zqcsi; 27 }; 28 29 struct drv_odt_lp_config { 30 uint32_t pd_idle; 31 uint32_t sr_idle; 32 uint32_t sr_mc_gate_idle; 33 uint32_t srpd_lite_idle; 34 uint32_t standby_idle; 35 uint32_t odt_en; 36 37 uint32_t dram_side_drv; 38 uint32_t dram_side_dq_odt; 39 uint32_t dram_side_ca_odt; 40 }; 41 42 uint32_t ddr_set_rate(uint32_t hz); 43 uint32_t ddr_round_rate(uint32_t hz); 44 uint32_t ddr_get_rate(void); 45 uint32_t dram_set_odt_pd(uint32_t arg0, uint32_t arg1, uint32_t arg2); 46 void dram_dfs_init(void); 47 void ddr_prepare_for_sys_suspend(void); 48 void ddr_prepare_for_sys_resume(void); 49 50 #endif /* DFS_H */ 51