[people/ms/u-boot.git] / board / sbc8548 / ddr.c

/*
 * 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.
 */

#include <common.h>

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

void fsl_ddr_board_options(memctl_options_t *popts,
				dimm_params_t *pdimm,
				unsigned int ctrl_num)
{
	/*
	 * Factors to consider for clock adjust:
	 *	- number of chips on bus
	 *	- position of slot
	 *	- DDR1 vs. DDR2?
	 *	- ???
	 *
	 * This needs to be determined on a board-by-board basis.
	 *	0110	3/4 cycle late
	 *	0111	7/8 cycle late
	 */
	popts->clk_adjust = 7;

	/*
	 * Factors to consider for CPO:
	 *	- frequency
	 *	- ddr1 vs. ddr2
	 */
	popts->cpo_override = 10;

	/*
	 * Factors to consider for write data delay:
	 *	- number of DIMMs
	 *
	 * 1 = 1/4 clock delay
	 * 2 = 1/2 clock delay
	 * 3 = 3/4 clock delay
	 * 4 = 1   clock delay
	 * 5 = 5/4 clock delay
	 * 6 = 3/2 clock delay
	 */
	popts->write_data_delay = 3;

	/*
	 * Factors to consider for half-strength driver enable:
	 *	- number of DIMMs installed
	 */
	popts->half_strength_driver_enable = 0;
}
Commit	Line	Data
33b9079b KG	1	/*
	2	* Copyright 2008 Freescale Semiconductor, Inc.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* Version 2 as published by the Free Software Foundation.
	7	*/
	8
	9	#include <common.h>
33b9079b KG	10
33b9079b KG	11	#include <asm/fsl_ddr_sdram.h>
dfb49108	12	#include <asm/fsl_ddr_dimm_params.h>
33b9079b	13
dfb49108 HW	14	void fsl_ddr_board_options(memctl_options_t *popts,
	15	dimm_params_t *pdimm,
	16	unsigned int ctrl_num)
33b9079b KG	17	{
	18	/*
	19	* Factors to consider for clock adjust:
	20	* - number of chips on bus
	21	* - position of slot
	22	* - DDR1 vs. DDR2?
	23	* - ???
	24	*
	25	* This needs to be determined on a board-by-board basis.
	26	* 0110 3/4 cycle late
	27	* 0111 7/8 cycle late
	28	*/
	29	popts->clk_adjust = 7;
	30
	31	/*
	32	* Factors to consider for CPO:
	33	* - frequency
	34	* - ddr1 vs. ddr2
	35	*/
	36	popts->cpo_override = 10;
	37
	38	/*
	39	* Factors to consider for write data delay:
	40	* - number of DIMMs
	41	*
	42	* 1 = 1/4 clock delay
	43	* 2 = 1/2 clock delay
	44	* 3 = 3/4 clock delay
	45	* 4 = 1 clock delay
	46	* 5 = 5/4 clock delay
	47	* 6 = 3/2 clock delay
	48	*/
	49	popts->write_data_delay = 3;
	50
	51	/*
	52	* Factors to consider for half-strength driver enable:
	53	* - number of DIMMs installed
	54	*/
	55	popts->half_strength_driver_enable = 0;
	56	}