diff options
Diffstat (limited to 'board/freescale/p2020ds/ddr.c')
| -rw-r--r-- | board/freescale/p2020ds/ddr.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/board/freescale/p2020ds/ddr.c b/board/freescale/p2020ds/ddr.c deleted file mode 100644 index debe70b..0000000 --- a/board/freescale/p2020ds/ddr.c +++ /dev/null @@ -1,129 +0,0 @@ -/* - * Copyright 2008-2009 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 <fsl_ddr_sdram.h> -#include <fsl_ddr_dimm_params.h> - -struct board_specific_parameters { - u32 n_ranks; - u32 datarate_mhz_high; - u32 clk_adjust; - u32 cpo; - u32 write_data_delay; - u32 force_2t; -}; - - -/* - * This table contains all valid speeds we want to override with board - * specific parameters. datarate_mhz_high values need to be in ascending order - * for each n_ranks group. - * - * ranges for parameters: - * wr_data_delay = 0-6 - * clk adjust = 0-8 - * cpo 2-0x1E (30) - */ -static const struct board_specific_parameters dimm0[] = { - /* - * memory controller 0 - * num| hi| clk| cpo|wrdata|2T - * ranks| mhz|adjst| | delay| - */ -#ifdef CONFIG_SYS_FSL_DDR2 - {2, 549, 4, 0x1f, 2, 0}, - {2, 680, 4, 0x1f, 3, 0}, - {2, 850, 4, 0x1f, 4, 0}, - {1, 549, 4, 0x1f, 2, 0}, - {1, 680, 4, 0x1f, 3, 0}, - {1, 850, 4, 0x1f, 4, 0}, -#else - {2, 850, 6, 0x1f, 4, 0}, - {1, 850, 4, 0x1f, 4, 0}, -#endif - {} -}; - -void fsl_ddr_board_options(memctl_options_t *popts, - dimm_params_t *pdimm, - unsigned int ctrl_num) -{ - const struct board_specific_parameters *pbsp, *pbsp_highest = NULL; - ulong ddr_freq; - int i; - - if (ctrl_num) { - printf("Wrong parameter for controller number %d", ctrl_num); - return; - } - if (!pdimm->n_ranks) - return; - - /* - * set odt_rd_cfg and odt_wr_cfg. If the there is only one dimm in - * that controller, set odt_wr_cfg to 4 for CS0, and 0 to CS1. If - * there are two dimms in the controller, set odt_rd_cfg to 3 and - * odt_wr_cfg to 3 for the even CS, 0 for the odd CS. - */ - for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { - popts->cs_local_opts[i].odt_rd_cfg = 0; - popts->cs_local_opts[i].odt_wr_cfg = 1; - } - - pbsp = dimm0; - - /* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr - * freqency and n_banks specified in board_specific_parameters table. - */ - ddr_freq = get_ddr_freq(0) / 1000000; - while (pbsp->datarate_mhz_high) { - if (pbsp->n_ranks == pdimm->n_ranks) { - if (ddr_freq <= pbsp->datarate_mhz_high) { - popts->clk_adjust = pbsp->clk_adjust; - popts->cpo_override = pbsp->cpo; - popts->write_data_delay = - pbsp->write_data_delay; - popts->twot_en = pbsp->force_2t; - goto found; - } - pbsp_highest = pbsp; - } - pbsp++; - } - - if (pbsp_highest) { - printf("Error: board specific timing not found " - "for data rate %lu MT/s!\n" - "Trying to use the highest speed (%u) parameters\n", - ddr_freq, pbsp_highest->datarate_mhz_high); - popts->clk_adjust = pbsp_highest->clk_adjust; - popts->cpo_override = pbsp_highest->cpo; - popts->write_data_delay = pbsp_highest->write_data_delay; - popts->twot_en = pbsp_highest->force_2t; - } else { - panic("DIMM is not supported by this board"); - } - -found: - /* - * Factors to consider for half-strength driver enable: - * - number of DIMMs installed - */ - popts->half_strength_driver_enable = 0; - popts->wrlvl_en = 1; - /* Write leveling override */ - popts->wrlvl_override = 1; - popts->wrlvl_sample = 0xa; - popts->wrlvl_start = 0x8; - /* Rtt and Rtt_WR override */ - popts->rtt_override = 1; - popts->rtt_override_value = DDR3_RTT_120_OHM; - popts->rtt_wr_override_value = 0; /* Rtt_WR= dynamic ODT off */ -} |