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133 lines
2.9 KiB
133 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* DDR addressing details and AC timing parameters from JEDEC specs |
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* |
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* Copyright (C) 2012 Texas Instruments, Inc. |
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* |
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* Aneesh V <[email protected]> |
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*/ |
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#include <linux/export.h> |
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#include "jedec_ddr.h" |
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/* LPDDR2 addressing details from JESD209-2 section 2.4 */ |
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const struct lpddr2_addressing |
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lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES] = { |
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{B4, T_REFI_15_6, T_RFC_90}, /* 64M */ |
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{B4, T_REFI_15_6, T_RFC_90}, /* 128M */ |
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{B4, T_REFI_7_8, T_RFC_90}, /* 256M */ |
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{B4, T_REFI_7_8, T_RFC_90}, /* 512M */ |
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{B8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */ |
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{B8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */ |
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{B8, T_REFI_3_9, T_RFC_130}, /* 4G */ |
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{B8, T_REFI_3_9, T_RFC_210}, /* 8G */ |
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{B4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */ |
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{B4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */ |
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}; |
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EXPORT_SYMBOL_GPL(lpddr2_jedec_addressing_table); |
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/* LPDDR2 AC timing parameters from JESD209-2 section 12 */ |
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const struct lpddr2_timings |
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lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES] = { |
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/* Speed bin 400(200 MHz) */ |
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[0] = { |
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.max_freq = 200000000, |
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.min_freq = 10000000, |
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.tRPab = 21000, |
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.tRCD = 18000, |
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.tWR = 15000, |
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.tRAS_min = 42000, |
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.tRRD = 10000, |
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.tWTR = 10000, |
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.tXP = 7500, |
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.tRTP = 7500, |
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.tCKESR = 15000, |
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.tDQSCK_max = 5500, |
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.tFAW = 50000, |
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.tZQCS = 90000, |
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.tZQCL = 360000, |
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.tZQinit = 1000000, |
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.tRAS_max_ns = 70000, |
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.tDQSCK_max_derated = 6000, |
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}, |
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/* Speed bin 533(266 MHz) */ |
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[1] = { |
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.max_freq = 266666666, |
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.min_freq = 10000000, |
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.tRPab = 21000, |
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.tRCD = 18000, |
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.tWR = 15000, |
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.tRAS_min = 42000, |
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.tRRD = 10000, |
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.tWTR = 7500, |
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.tXP = 7500, |
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.tRTP = 7500, |
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.tCKESR = 15000, |
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.tDQSCK_max = 5500, |
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.tFAW = 50000, |
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.tZQCS = 90000, |
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.tZQCL = 360000, |
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.tZQinit = 1000000, |
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.tRAS_max_ns = 70000, |
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.tDQSCK_max_derated = 6000, |
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}, |
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/* Speed bin 800(400 MHz) */ |
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[2] = { |
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.max_freq = 400000000, |
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.min_freq = 10000000, |
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.tRPab = 21000, |
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.tRCD = 18000, |
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.tWR = 15000, |
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.tRAS_min = 42000, |
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.tRRD = 10000, |
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.tWTR = 7500, |
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.tXP = 7500, |
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.tRTP = 7500, |
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.tCKESR = 15000, |
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.tDQSCK_max = 5500, |
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.tFAW = 50000, |
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.tZQCS = 90000, |
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.tZQCL = 360000, |
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.tZQinit = 1000000, |
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.tRAS_max_ns = 70000, |
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.tDQSCK_max_derated = 6000, |
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}, |
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/* Speed bin 1066(533 MHz) */ |
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[3] = { |
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.max_freq = 533333333, |
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.min_freq = 10000000, |
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.tRPab = 21000, |
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.tRCD = 18000, |
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.tWR = 15000, |
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.tRAS_min = 42000, |
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.tRRD = 10000, |
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.tWTR = 7500, |
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.tXP = 7500, |
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.tRTP = 7500, |
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.tCKESR = 15000, |
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.tDQSCK_max = 5500, |
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.tFAW = 50000, |
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.tZQCS = 90000, |
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.tZQCL = 360000, |
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.tZQinit = 1000000, |
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.tRAS_max_ns = 70000, |
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.tDQSCK_max_derated = 5620, |
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}, |
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}; |
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EXPORT_SYMBOL_GPL(lpddr2_jedec_timings); |
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const struct lpddr2_min_tck lpddr2_jedec_min_tck = { |
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.tRPab = 3, |
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.tRCD = 3, |
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.tWR = 3, |
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.tRASmin = 3, |
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.tRRD = 2, |
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.tWTR = 2, |
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.tXP = 2, |
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.tRTP = 2, |
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.tCKE = 3, |
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.tCKESR = 3, |
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.tFAW = 8 |
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}; |
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EXPORT_SYMBOL_GPL(lpddr2_jedec_min_tck);
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