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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175// SPDX-License-Identifier: GPL-2.0-only/* * DDR addressing details and AC timing parameters from JEDEC specs * * Copyright (C) 2012 Texas Instruments, Inc. * * Aneesh V <aneesh@ti.com> */
#include <linux/export.h>
#include "jedec_ddr.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);
const char *lpddr2_jedec_manufacturer(unsigned int manufacturer_id){ switch (manufacturer_id) { case LPDDR2_MANID_SAMSUNG: return "Samsung"; case LPDDR2_MANID_QIMONDA: return "Qimonda"; case LPDDR2_MANID_ELPIDA: return "Elpida"; case LPDDR2_MANID_ETRON: return "Etron"; case LPDDR2_MANID_NANYA: return "Nanya"; case LPDDR2_MANID_HYNIX: return "Hynix"; case LPDDR2_MANID_MOSEL: return "Mosel"; case LPDDR2_MANID_WINBOND: return "Winbond"; case LPDDR2_MANID_ESMT: return "ESMT"; case LPDDR2_MANID_SPANSION: return "Spansion"; case LPDDR2_MANID_SST: return "SST"; case LPDDR2_MANID_ZMOS: return "ZMOS"; case LPDDR2_MANID_INTEL: return "Intel"; case LPDDR2_MANID_NUMONYX: return "Numonyx"; case LPDDR2_MANID_MICRON: return "Micron"; default: break; }
return "invalid";}EXPORT_SYMBOL_GPL(lpddr2_jedec_manufacturer);