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author | Alex Dubov <oakad@yahoo.com> | 2009-08-07 15:28:32 +1000 |
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committer | Kumar Gala <galak@kernel.crashing.org> | 2009-08-28 17:12:38 -0500 |
commit | 7b18c227b847e4782eb1492219ebd555f521b08b (patch) | |
tree | fc36ac044cd004a7296e04ca81803bb48bccc953 /board/stx/stxssa/ddr.c | |
parent | bafdf9aa9dbb69d937b72db17ed5800998c59523 (diff) | |
download | u-boot-imx-7b18c227b847e4782eb1492219ebd555f521b08b.zip u-boot-imx-7b18c227b847e4782eb1492219ebd555f521b08b.tar.gz u-boot-imx-7b18c227b847e4782eb1492219ebd555f521b08b.tar.bz2 |
stx: create common vendor/board hierarchy for STx boards
Move files belonging to the STx boards into common vendor directory and
update the Makefile to reflect this.
Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'board/stx/stxssa/ddr.c')
-rw-r--r-- | board/stx/stxssa/ddr.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/board/stx/stxssa/ddr.c b/board/stx/stxssa/ddr.c new file mode 100644 index 0000000..93d1100 --- /dev/null +++ b/board/stx/stxssa/ddr.c @@ -0,0 +1,76 @@ +/* + * 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(ddr1_spd_eeprom_t *spd, unsigned char i2c_address) +{ + i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr1_spd_eeprom_t)); +} + + +unsigned int +fsl_ddr_get_mem_data_rate(void) +{ + return get_ddr_freq(0); +} + + +void +fsl_ddr_get_spd(ddr1_spd_eeprom_t *ctrl_dimms_spd, + unsigned int ctrl_num) +{ + unsigned int i; + unsigned int i2c_address = 0; + + for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) { + if (ctrl_num == 0 && i == 0) { + i2c_address = SPD_EEPROM_ADDRESS; + } + get_spd(&(ctrl_dimms_spd[i]), i2c_address); + } +} + +void fsl_ddr_board_options(memctl_options_t *popts, + dimm_params_t *pdimm, + unsigned int ctrl_num) +{ + /* + * Factors to consider for CPO: + * - frequency + * - ddr1 vs. ddr2 + */ + popts->cpo_override = 0; + + /* + * 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; +} |