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c63e137014
JEDEC spec requires the clocks to be stable before deasserting reset signal for RDIMMs. Clocks start when any chip select is enabled and clock control register is set. This patch also adds the interface to toggle memory reset signal if needed by the boards. Signed-off-by: York Sun <yorksun@freescale.com>
105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/*
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* Copyright 2008-2011 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* Version 2 as published by the Free Software Foundation.
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*/
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#ifndef FSL_DDR_MAIN_H
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#define FSL_DDR_MAIN_H
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#include <asm/fsl_ddr_sdram.h>
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#include <asm/fsl_ddr_dimm_params.h>
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#include "common_timing_params.h"
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#if defined(CONFIG_DDR_SPD) || defined(CONFIG_SPD_EEPROM)
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/*
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* Bind the main DDR setup driver's generic names
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* to this specific DDR technology.
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*/
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static __inline__ int
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compute_dimm_parameters(const generic_spd_eeprom_t *spd,
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dimm_params_t *pdimm,
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unsigned int dimm_number)
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{
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return ddr_compute_dimm_parameters(spd, pdimm, dimm_number);
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}
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#endif
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/*
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* Data Structures
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*
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* All data structures have to be on the stack
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*/
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#define CONFIG_SYS_NUM_DDR_CTLRS CONFIG_NUM_DDR_CONTROLLERS
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#define CONFIG_SYS_DIMM_SLOTS_PER_CTLR CONFIG_DIMM_SLOTS_PER_CTLR
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typedef struct {
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generic_spd_eeprom_t
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spd_installed_dimms[CONFIG_SYS_NUM_DDR_CTLRS][CONFIG_SYS_DIMM_SLOTS_PER_CTLR];
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struct dimm_params_s
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dimm_params[CONFIG_SYS_NUM_DDR_CTLRS][CONFIG_SYS_DIMM_SLOTS_PER_CTLR];
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memctl_options_t memctl_opts[CONFIG_SYS_NUM_DDR_CTLRS];
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common_timing_params_t common_timing_params[CONFIG_SYS_NUM_DDR_CTLRS];
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fsl_ddr_cfg_regs_t fsl_ddr_config_reg[CONFIG_SYS_NUM_DDR_CTLRS];
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} fsl_ddr_info_t;
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/* Compute steps */
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#define STEP_GET_SPD (1 << 0)
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#define STEP_COMPUTE_DIMM_PARMS (1 << 1)
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#define STEP_COMPUTE_COMMON_PARMS (1 << 2)
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#define STEP_GATHER_OPTS (1 << 3)
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#define STEP_ASSIGN_ADDRESSES (1 << 4)
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#define STEP_COMPUTE_REGS (1 << 5)
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#define STEP_PROGRAM_REGS (1 << 6)
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#define STEP_ALL 0xFFF
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unsigned long long
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fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step,
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unsigned int size_only);
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const char *step_to_string(unsigned int step);
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unsigned int compute_fsl_memctl_config_regs(const memctl_options_t *popts,
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fsl_ddr_cfg_regs_t *ddr,
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const common_timing_params_t *common_dimm,
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const dimm_params_t *dimm_parameters,
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unsigned int dbw_capacity_adjust,
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unsigned int size_only);
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unsigned int compute_lowest_common_dimm_parameters(
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const dimm_params_t *dimm_params,
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common_timing_params_t *outpdimm,
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unsigned int number_of_dimms);
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unsigned int populate_memctl_options(int all_DIMMs_registered,
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memctl_options_t *popts,
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dimm_params_t *pdimm,
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unsigned int ctrl_num);
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void check_interleaving_options(fsl_ddr_info_t *pinfo);
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unsigned int mclk_to_picos(unsigned int mclk);
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unsigned int get_memory_clk_period_ps(void);
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unsigned int picos_to_mclk(unsigned int picos);
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void fsl_ddr_set_lawbar(
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const common_timing_params_t *memctl_common_params,
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unsigned int memctl_interleaved,
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unsigned int ctrl_num);
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int fsl_ddr_interactive_env_var_exists(void);
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unsigned long long fsl_ddr_interactive(fsl_ddr_info_t *pinfo, int var_is_set);
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void fsl_ddr_get_spd(generic_spd_eeprom_t *ctrl_dimms_spd,
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unsigned int ctrl_num);
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int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
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unsigned int check_fsl_memctl_config_regs(const fsl_ddr_cfg_regs_t *ddr);
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/* processor specific function */
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void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
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unsigned int ctrl_num, int step);
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/* board specific function */
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int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
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unsigned int controller_number,
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unsigned int dimm_number);
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#endif
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