1 /* 2 * Copyright 2010 Freescale Semiconductor, Inc. 3 * Authors: Srikanth Srinivasan <srikanth.srinivasan@freescale.com> 4 * Timur Tabi <timur@freescale.com> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the Free 8 * Software Foundation; either version 2 of the License, or (at your option) 9 * any later version. 10 */ 11 12 #include <common.h> 13 #include <i2c.h> 14 15 #include <asm/fsl_ddr_sdram.h> 16 #include <asm/fsl_ddr_dimm_params.h> 17 18 void fsl_ddr_board_options(memctl_options_t *popts, dimm_params_t *pdimm, 19 unsigned int ctrl_num) 20 { 21 unsigned int i; 22 23 if (ctrl_num) { 24 printf("Wrong parameter for controller number %d", ctrl_num); 25 return; 26 } 27 if (!pdimm->n_ranks) 28 return; 29 30 /* set odt_rd_cfg and odt_wr_cfg. */ 31 for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { 32 popts->cs_local_opts[i].odt_rd_cfg = 0; 33 popts->cs_local_opts[i].odt_wr_cfg = 1; 34 } 35 36 popts->clk_adjust = 5; 37 popts->cpo_override = 0x1f; 38 popts->write_data_delay = 2; 39 popts->half_strength_driver_enable = 1; 40 41 /* Per AN4039, enable ZQ calibration. */ 42 popts->zq_en = 1; 43 } 44 45 #ifdef CONFIG_SPD_EEPROM 46 /* 47 * we only have a "fake" SPD-EEPROM here, which has 16 bit addresses 48 */ 49 void get_spd(generic_spd_eeprom_t *spd, u8 i2c_address) 50 { 51 int ret = i2c_read(i2c_address, 0, 2, (uchar *)spd, 52 sizeof(generic_spd_eeprom_t)); 53 54 if (ret) { 55 if (i2c_address == 56 #ifdef SPD_EEPROM_ADDRESS 57 SPD_EEPROM_ADDRESS 58 #elif defined(SPD_EEPROM_ADDRESS1) 59 SPD_EEPROM_ADDRESS1 60 #endif 61 ) { 62 printf("DDR: failed to read SPD from address %u\n", 63 i2c_address); 64 } else { 65 debug("DDR: failed to read SPD from address %u\n", 66 i2c_address); 67 } 68 memset(spd, 0, sizeof(generic_spd_eeprom_t)); 69 } 70 } 71 #endif 72