arch/powerpc/cpu/mpc8xxx/ddr/ddr.h

/*
 * Copyright 2008 Freescale Semiconductor, Inc.
 *
 * 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 FSL_DDR_MAIN_H
#define FSL_DDR_MAIN_H

#include <asm/fsl_ddr_sdram.h>
#include <asm/fsl_ddr_dimm_params.h>

#include "common_timing_params.h"

/*
 * Bind the main DDR setup driver's generic names
 * to this specific DDR technology.
 */
static __inline__ int
compute_dimm_parameters(const generic_spd_eeprom_t *spd,
			dimm_params_t *pdimm,
			unsigned int dimm_number)
{
	return ddr_compute_dimm_parameters(spd, pdimm, dimm_number);
}

/*
 * Data Structures
 *
 * All data structures have to be on the stack
 */
#define CONFIG_SYS_NUM_DDR_CTLRS CONFIG_NUM_DDR_CONTROLLERS
#define CONFIG_SYS_DIMM_SLOTS_PER_CTLR CONFIG_DIMM_SLOTS_PER_CTLR

typedef struct {
	generic_spd_eeprom_t
	   spd_installed_dimms[CONFIG_SYS_NUM_DDR_CTLRS][CONFIG_SYS_DIMM_SLOTS_PER_CTLR];
	struct dimm_params_s
	   dimm_params[CONFIG_SYS_NUM_DDR_CTLRS][CONFIG_SYS_DIMM_SLOTS_PER_CTLR];
	memctl_options_t memctl_opts[CONFIG_SYS_NUM_DDR_CTLRS];
	common_timing_params_t common_timing_params[CONFIG_SYS_NUM_DDR_CTLRS];
	fsl_ddr_cfg_regs_t fsl_ddr_config_reg[CONFIG_SYS_NUM_DDR_CTLRS];
} fsl_ddr_info_t;

/* Compute steps */
#define STEP_GET_SPD                 (1 << 0)
#define STEP_COMPUTE_DIMM_PARMS      (1 << 1)
#define STEP_COMPUTE_COMMON_PARMS    (1 << 2)
#define STEP_GATHER_OPTS             (1 << 3)
#define STEP_ASSIGN_ADDRESSES        (1 << 4)
#define STEP_COMPUTE_REGS            (1 << 5)
#define STEP_PROGRAM_REGS            (1 << 6)
#define STEP_ALL                     0xFFF

extern unsigned long long
fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step);

extern const char * step_to_string(unsigned int step);

extern unsigned int
compute_fsl_memctl_config_regs(const memctl_options_t *popts,
			       fsl_ddr_cfg_regs_t *ddr,
			       const common_timing_params_t *common_dimm,
			       const dimm_params_t *dimm_parameters,
			       unsigned int dbw_capacity_adjust);
extern unsigned int
compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
				      common_timing_params_t *outpdimm,
				      unsigned int number_of_dimms);
extern unsigned int populate_memctl_options(int all_DIMMs_registered,
				memctl_options_t *popts,
				dimm_params_t *pdimm,
				unsigned int ctrl_num);
extern void check_interleaving_options(fsl_ddr_info_t *pinfo);

extern unsigned int mclk_to_picos(unsigned int mclk);
extern unsigned int get_memory_clk_period_ps(void);
extern unsigned int picos_to_mclk(unsigned int picos);

#endif