1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * DDR addressing details and AC timing parameters from JEDEC specs 4 * 5 * Copyright (C) 2012 Texas Instruments, Inc. 6 * 7 * Aneesh V <aneesh@ti.com> 8 */ 9 10 #include <linux/export.h> 11 12 #include "jedec_ddr.h" 13 14 /* LPDDR2 addressing details from JESD209-2 section 2.4 */ 15 const struct lpddr2_addressing 16 lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES] = { 17 {B4, T_REFI_15_6, T_RFC_90}, /* 64M */ 18 {B4, T_REFI_15_6, T_RFC_90}, /* 128M */ 19 {B4, T_REFI_7_8, T_RFC_90}, /* 256M */ 20 {B4, T_REFI_7_8, T_RFC_90}, /* 512M */ 21 {B8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */ 22 {B8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */ 23 {B8, T_REFI_3_9, T_RFC_130}, /* 4G */ 24 {B8, T_REFI_3_9, T_RFC_210}, /* 8G */ 25 {B4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */ 26 {B4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */ 27 }; 28 EXPORT_SYMBOL_GPL(lpddr2_jedec_addressing_table); 29 30 /* LPDDR2 AC timing parameters from JESD209-2 section 12 */ 31 const struct lpddr2_timings 32 lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES] = { 33 /* Speed bin 400(200 MHz) */ 34 [0] = { 35 .max_freq = 200000000, 36 .min_freq = 10000000, 37 .tRPab = 21000, 38 .tRCD = 18000, 39 .tWR = 15000, 40 .tRAS_min = 42000, 41 .tRRD = 10000, 42 .tWTR = 10000, 43 .tXP = 7500, 44 .tRTP = 7500, 45 .tCKESR = 15000, 46 .tDQSCK_max = 5500, 47 .tFAW = 50000, 48 .tZQCS = 90000, 49 .tZQCL = 360000, 50 .tZQinit = 1000000, 51 .tRAS_max_ns = 70000, 52 .tDQSCK_max_derated = 6000, 53 }, 54 /* Speed bin 533(266 MHz) */ 55 [1] = { 56 .max_freq = 266666666, 57 .min_freq = 10000000, 58 .tRPab = 21000, 59 .tRCD = 18000, 60 .tWR = 15000, 61 .tRAS_min = 42000, 62 .tRRD = 10000, 63 .tWTR = 7500, 64 .tXP = 7500, 65 .tRTP = 7500, 66 .tCKESR = 15000, 67 .tDQSCK_max = 5500, 68 .tFAW = 50000, 69 .tZQCS = 90000, 70 .tZQCL = 360000, 71 .tZQinit = 1000000, 72 .tRAS_max_ns = 70000, 73 .tDQSCK_max_derated = 6000, 74 }, 75 /* Speed bin 800(400 MHz) */ 76 [2] = { 77 .max_freq = 400000000, 78 .min_freq = 10000000, 79 .tRPab = 21000, 80 .tRCD = 18000, 81 .tWR = 15000, 82 .tRAS_min = 42000, 83 .tRRD = 10000, 84 .tWTR = 7500, 85 .tXP = 7500, 86 .tRTP = 7500, 87 .tCKESR = 15000, 88 .tDQSCK_max = 5500, 89 .tFAW = 50000, 90 .tZQCS = 90000, 91 .tZQCL = 360000, 92 .tZQinit = 1000000, 93 .tRAS_max_ns = 70000, 94 .tDQSCK_max_derated = 6000, 95 }, 96 /* Speed bin 1066(533 MHz) */ 97 [3] = { 98 .max_freq = 533333333, 99 .min_freq = 10000000, 100 .tRPab = 21000, 101 .tRCD = 18000, 102 .tWR = 15000, 103 .tRAS_min = 42000, 104 .tRRD = 10000, 105 .tWTR = 7500, 106 .tXP = 7500, 107 .tRTP = 7500, 108 .tCKESR = 15000, 109 .tDQSCK_max = 5500, 110 .tFAW = 50000, 111 .tZQCS = 90000, 112 .tZQCL = 360000, 113 .tZQinit = 1000000, 114 .tRAS_max_ns = 70000, 115 .tDQSCK_max_derated = 5620, 116 }, 117 }; 118 EXPORT_SYMBOL_GPL(lpddr2_jedec_timings); 119 120 const struct lpddr2_min_tck lpddr2_jedec_min_tck = { 121 .tRPab = 3, 122 .tRCD = 3, 123 .tWR = 3, 124 .tRASmin = 3, 125 .tRRD = 2, 126 .tWTR = 2, 127 .tXP = 2, 128 .tRTP = 2, 129 .tCKE = 3, 130 .tCKESR = 3, 131 .tFAW = 8 132 }; 133 EXPORT_SYMBOL_GPL(lpddr2_jedec_min_tck); 134