/* * 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 <i2c.h> #include <asm/fsl_ddr_sdram.h> #include <asm/fsl_ddr_dimm_params.h> static void get_spd(ddr2_spd_eeprom_t *spd, unsigned char i2c_address) { i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr2_spd_eeprom_t)); } unsigned int fsl_ddr_get_mem_data_rate(void) { return get_ddr_freq(0); } void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd, unsigned int ctrl_num) { unsigned int i; if (ctrl_num) { printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num); return; } for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) { get_spd(&(ctrl_dimms_spd[i]), SPD_EEPROM_ADDRESS); } } 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; /* 2T timing enable */ popts->twoT_en = 1; /* * Factors to consider for half-strength driver enable: * - number of DIMMs installed */ popts->half_strength_driver_enable = 0; }