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jedec_ddr_data.c
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jedec_ddr_data.c
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/*
* DDR addressing details and AC timing parameters from JEDEC specs
*
* Copyright (C) 2012 Texas Instruments, Inc.
*
* Aneesh V <aneesh@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <memory/jedec_ddr.h>
#include <linux/module.h>
/* LPDDR2 addressing details from JESD209-2 section 2.4 */
const struct lpddr2_addressing
lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES] = {
{B4, T_REFI_15_6, T_RFC_90}, /* 64M */
{B4, T_REFI_15_6, T_RFC_90}, /* 128M */
{B4, T_REFI_7_8, T_RFC_90}, /* 256M */
{B4, T_REFI_7_8, T_RFC_90}, /* 512M */
{B8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */
{B8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */
{B8, T_REFI_3_9, T_RFC_130}, /* 4G */
{B8, T_REFI_3_9, T_RFC_210}, /* 8G */
{B4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */
{B4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */
};
EXPORT_SYMBOL_GPL(lpddr2_jedec_addressing_table);
/* LPDDR2 AC timing parameters from JESD209-2 section 12 */
const struct lpddr2_timings
lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES] = {
/* Speed bin 400(200 MHz) */
[0] = {
.max_freq = 200000000,
.min_freq = 10000000,
.tRPab = 21000,
.tRCD = 18000,
.tWR = 15000,
.tRAS_min = 42000,
.tRRD = 10000,
.tWTR = 10000,
.tXP = 7500,
.tRTP = 7500,
.tCKESR = 15000,
.tDQSCK_max = 5500,
.tFAW = 50000,
.tZQCS = 90000,
.tZQCL = 360000,
.tZQinit = 1000000,
.tRAS_max_ns = 70000,
.tDQSCK_max_derated = 6000,
},
/* Speed bin 533(266 MHz) */
[1] = {
.max_freq = 266666666,
.min_freq = 10000000,
.tRPab = 21000,
.tRCD = 18000,
.tWR = 15000,
.tRAS_min = 42000,
.tRRD = 10000,
.tWTR = 7500,
.tXP = 7500,
.tRTP = 7500,
.tCKESR = 15000,
.tDQSCK_max = 5500,
.tFAW = 50000,
.tZQCS = 90000,
.tZQCL = 360000,
.tZQinit = 1000000,
.tRAS_max_ns = 70000,
.tDQSCK_max_derated = 6000,
},
/* Speed bin 800(400 MHz) */
[2] = {
.max_freq = 400000000,
.min_freq = 10000000,
.tRPab = 21000,
.tRCD = 18000,
.tWR = 15000,
.tRAS_min = 42000,
.tRRD = 10000,
.tWTR = 7500,
.tXP = 7500,
.tRTP = 7500,
.tCKESR = 15000,
.tDQSCK_max = 5500,
.tFAW = 50000,
.tZQCS = 90000,
.tZQCL = 360000,
.tZQinit = 1000000,
.tRAS_max_ns = 70000,
.tDQSCK_max_derated = 6000,
},
/* Speed bin 1066(533 MHz) */
[3] = {
.max_freq = 533333333,
.min_freq = 10000000,
.tRPab = 21000,
.tRCD = 18000,
.tWR = 15000,
.tRAS_min = 42000,
.tRRD = 10000,
.tWTR = 7500,
.tXP = 7500,
.tRTP = 7500,
.tCKESR = 15000,
.tDQSCK_max = 5500,
.tFAW = 50000,
.tZQCS = 90000,
.tZQCL = 360000,
.tZQinit = 1000000,
.tRAS_max_ns = 70000,
.tDQSCK_max_derated = 5620,
},
};
EXPORT_SYMBOL_GPL(lpddr2_jedec_timings);
const struct lpddr2_min_tck lpddr2_jedec_min_tck = {
.tRPab = 3,
.tRCD = 3,
.tWR = 3,
.tRASmin = 3,
.tRRD = 2,
.tWTR = 2,
.tXP = 2,
.tRTP = 2,
.tCKE = 3,
.tCKESR = 3,
.tFAW = 8
};
EXPORT_SYMBOL_GPL(lpddr2_jedec_min_tck);