linux/drivers/memory/jedec_ddr.h
Linus Torvalds 8362fd64f0 ARM: SoC-related driver updates
Various driver updates for platforms and a couple of the small driver
 subsystems we merge through our tree:
 
  - A driver for SCU (system control) on NXP i.MX8QXP
  - Qualcomm Always-on Subsystem messaging driver (AOSS QMP)
  - Qualcomm PM support for MSM8998
  - Support for a newer version of DRAM PHY driver for Broadcom (DPFE)
  - Reset controller support for Bitmain BM1880
  - TI SCI (System Control Interface) support for CPU control on AM654
    processors
  - More TI sysc refactoring and rework
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC-related driver updates from Olof Johansson:
 "Various driver updates for platforms and a couple of the small driver
  subsystems we merge through our tree:

   - A driver for SCU (system control) on NXP i.MX8QXP

   - Qualcomm Always-on Subsystem messaging driver (AOSS QMP)

   - Qualcomm PM support for MSM8998

   - Support for a newer version of DRAM PHY driver for Broadcom (DPFE)

   - Reset controller support for Bitmain BM1880

   - TI SCI (System Control Interface) support for CPU control on AM654
     processors

   - More TI sysc refactoring and rework"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (84 commits)
  reset: remove redundant null check on pointer dev
  soc: rockchip: work around clang warning
  dt-bindings: reset: imx7: Fix the spelling of 'indices'
  soc: imx: Add i.MX8MN SoC driver support
  soc: aspeed: lpc-ctrl: Fix probe error handling
  soc: qcom: geni: Add support for ACPI
  firmware: ti_sci: Fix gcc unused-but-set-variable warning
  firmware: ti_sci: Use the correct style for SPDX License Identifier
  soc: imx8: Use existing of_root directly
  soc: imx8: Fix potential kernel dump in error path
  firmware/psci: psci_checker: Park kthreads before stopping them
  memory: move jedec_ddr.h from include/memory to drivers/memory/
  memory: move jedec_ddr_data.c from lib/ to drivers/memory/
  MAINTAINERS: Remove myself as qcom maintainer
  soc: aspeed: lpc-ctrl: make parameter optional
  soc: qcom: apr: Don't use reg for domain id
  soc: qcom: fix QCOM_AOSS_QMP dependency and build errors
  memory: tegra: Fix -Wunused-const-variable
  firmware: tegra: Early resume BPMP
  soc/tegra: Select pinctrl for Tegra194
  ...
2019-07-19 17:13:56 -07:00

173 lines
3.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Definitions for DDR memories based on JEDEC specs
*
* Copyright (C) 2012 Texas Instruments, Inc.
*
* Aneesh V <aneesh@ti.com>
*/
#ifndef __JEDEC_DDR_H
#define __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 /* __JEDEC_DDR_H */