176 строки
3.6 KiB
C
176 строки
3.6 KiB
C
/*
|
|
* Definitions for DDR memories based on 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.
|
|
*/
|
|
#ifndef __LINUX_JEDEC_DDR_H
|
|
#define __LINUX_JEDEC_DDR_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
/* DDR Densities */
|
|
#define DDR_DENSITY_64Mb 1
|
|
#define DDR_DENSITY_128Mb 2
|
|
#define DDR_DENSITY_256Mb 3
|
|
#define DDR_DENSITY_512Mb 4
|
|
#define DDR_DENSITY_1Gb 5
|
|
#define DDR_DENSITY_2Gb 6
|
|
#define DDR_DENSITY_4Gb 7
|
|
#define DDR_DENSITY_8Gb 8
|
|
#define DDR_DENSITY_16Gb 9
|
|
#define DDR_DENSITY_32Gb 10
|
|
|
|
/* DDR type */
|
|
#define DDR_TYPE_DDR2 1
|
|
#define DDR_TYPE_DDR3 2
|
|
#define DDR_TYPE_LPDDR2_S4 3
|
|
#define DDR_TYPE_LPDDR2_S2 4
|
|
#define DDR_TYPE_LPDDR2_NVM 5
|
|
|
|
/* DDR IO width */
|
|
#define DDR_IO_WIDTH_4 1
|
|
#define DDR_IO_WIDTH_8 2
|
|
#define DDR_IO_WIDTH_16 3
|
|
#define DDR_IO_WIDTH_32 4
|
|
|
|
/* Number of Row bits */
|
|
#define R9 9
|
|
#define R10 10
|
|
#define R11 11
|
|
#define R12 12
|
|
#define R13 13
|
|
#define R14 14
|
|
#define R15 15
|
|
#define R16 16
|
|
|
|
/* Number of Column bits */
|
|
#define C7 7
|
|
#define C8 8
|
|
#define C9 9
|
|
#define C10 10
|
|
#define C11 11
|
|
#define C12 12
|
|
|
|
/* Number of Banks */
|
|
#define B1 0
|
|
#define B2 1
|
|
#define B4 2
|
|
#define B8 3
|
|
|
|
/* Refresh rate in nano-seconds */
|
|
#define T_REFI_15_6 15600
|
|
#define T_REFI_7_8 7800
|
|
#define T_REFI_3_9 3900
|
|
|
|
/* tRFC values */
|
|
#define T_RFC_90 90000
|
|
#define T_RFC_110 110000
|
|
#define T_RFC_130 130000
|
|
#define T_RFC_160 160000
|
|
#define T_RFC_210 210000
|
|
#define T_RFC_300 300000
|
|
#define T_RFC_350 350000
|
|
|
|
/* Mode register numbers */
|
|
#define DDR_MR0 0
|
|
#define DDR_MR1 1
|
|
#define DDR_MR2 2
|
|
#define DDR_MR3 3
|
|
#define DDR_MR4 4
|
|
#define DDR_MR5 5
|
|
#define DDR_MR6 6
|
|
#define DDR_MR7 7
|
|
#define DDR_MR8 8
|
|
#define DDR_MR9 9
|
|
#define DDR_MR10 10
|
|
#define DDR_MR11 11
|
|
#define DDR_MR16 16
|
|
#define DDR_MR17 17
|
|
#define DDR_MR18 18
|
|
|
|
/*
|
|
* LPDDR2 related defines
|
|
*/
|
|
|
|
/* MR4 register fields */
|
|
#define MR4_SDRAM_REF_RATE_SHIFT 0
|
|
#define MR4_SDRAM_REF_RATE_MASK 7
|
|
#define MR4_TUF_SHIFT 7
|
|
#define MR4_TUF_MASK (1 << 7)
|
|
|
|
/* MR4 SDRAM Refresh Rate field values */
|
|
#define SDRAM_TEMP_NOMINAL 0x3
|
|
#define SDRAM_TEMP_RESERVED_4 0x4
|
|
#define SDRAM_TEMP_HIGH_DERATE_REFRESH 0x5
|
|
#define SDRAM_TEMP_HIGH_DERATE_REFRESH_AND_TIMINGS 0x6
|
|
#define SDRAM_TEMP_VERY_HIGH_SHUTDOWN 0x7
|
|
|
|
#define NUM_DDR_ADDR_TABLE_ENTRIES 11
|
|
#define NUM_DDR_TIMING_TABLE_ENTRIES 4
|
|
|
|
/* Structure for DDR addressing info from the JEDEC spec */
|
|
struct lpddr2_addressing {
|
|
u32 num_banks;
|
|
u32 tREFI_ns;
|
|
u32 tRFCab_ps;
|
|
};
|
|
|
|
/*
|
|
* Structure for timings from the LPDDR2 datasheet
|
|
* All parameters are in pico seconds(ps) unless explicitly indicated
|
|
* with a suffix like tRAS_max_ns below
|
|
*/
|
|
struct lpddr2_timings {
|
|
u32 max_freq;
|
|
u32 min_freq;
|
|
u32 tRPab;
|
|
u32 tRCD;
|
|
u32 tWR;
|
|
u32 tRAS_min;
|
|
u32 tRRD;
|
|
u32 tWTR;
|
|
u32 tXP;
|
|
u32 tRTP;
|
|
u32 tCKESR;
|
|
u32 tDQSCK_max;
|
|
u32 tDQSCK_max_derated;
|
|
u32 tFAW;
|
|
u32 tZQCS;
|
|
u32 tZQCL;
|
|
u32 tZQinit;
|
|
u32 tRAS_max_ns;
|
|
};
|
|
|
|
/*
|
|
* Min value for some parameters in terms of number of tCK cycles(nCK)
|
|
* Please set to zero parameters that are not valid for a given memory
|
|
* type
|
|
*/
|
|
struct lpddr2_min_tck {
|
|
u32 tRPab;
|
|
u32 tRCD;
|
|
u32 tWR;
|
|
u32 tRASmin;
|
|
u32 tRRD;
|
|
u32 tWTR;
|
|
u32 tXP;
|
|
u32 tRTP;
|
|
u32 tCKE;
|
|
u32 tCKESR;
|
|
u32 tFAW;
|
|
};
|
|
|
|
extern const struct lpddr2_addressing
|
|
lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES];
|
|
extern const struct lpddr2_timings
|
|
lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES];
|
|
extern const struct lpddr2_min_tck lpddr2_jedec_min_tck;
|
|
|
|
#endif /* __LINUX_JEDEC_DDR_H */
|