diff options
Diffstat (limited to 'board/freescale/ls1046aqds/ddr.c')
| -rw-r--r-- | board/freescale/ls1046aqds/ddr.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/board/freescale/ls1046aqds/ddr.c b/board/freescale/ls1046aqds/ddr.c new file mode 100644 index 0000000000..d8139653ad --- /dev/null +++ b/board/freescale/ls1046aqds/ddr.c @@ -0,0 +1,140 @@ +/* + * Copyright 2016 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <fsl_ddr_sdram.h> +#include <fsl_ddr_dimm_params.h> +#ifdef CONFIG_FSL_DEEP_SLEEP +#include <fsl_sleep.h> +#endif +#include "ddr.h" + +DECLARE_GLOBAL_DATA_PTR; + +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; + + if (ctrl_num > 3) { + printf("Not supported controller number %d\n", ctrl_num); + return; + } + if (!pdimm->n_ranks) + return; + + pbsp = udimms[0]; + + /* Get clk_adjust, wrlvl_start, wrlvl_ctl, 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->wrlvl_start = pbsp->wrlvl_start; + popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; + popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; + goto found; + } + pbsp_highest = pbsp; + } + pbsp++; + } + + if (pbsp_highest) { + printf("Error: board specific timing not found for %lu MT/s\n", + ddr_freq); + printf("Trying to use the highest speed (%u) parameters\n", + pbsp_highest->datarate_mhz_high); + popts->clk_adjust = pbsp_highest->clk_adjust; + popts->wrlvl_start = pbsp_highest->wrlvl_start; + popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; + popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; + } else { + panic("DIMM is not supported by this board"); + } +found: + debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n", + pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb); + + popts->data_bus_width = 0; /* 64b data bus */ + popts->otf_burst_chop_en = 0; + popts->burst_length = DDR_BL8; + popts->bstopre = 0; /* enable auto precharge */ + + popts->half_strength_driver_enable = 0; + /* + * Write leveling override + */ + popts->wrlvl_override = 1; + popts->wrlvl_sample = 0xf; + + /* + * Rtt and Rtt_WR override + */ + popts->rtt_override = 0; + + /* Enable ZQ calibration */ + popts->zq_en = 1; + + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) | + DDR_CDR2_VREF_TRAIN_EN | DDR_CDR2_VREF_RANGE_2; +} + +phys_size_t initdram(int board_type) +{ + phys_size_t dram_size; + +#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD) + return fsl_ddr_sdram_size(); +#else + puts("Initializing DDR....using SPD\n"); + + dram_size = fsl_ddr_sdram(); +#endif + +#ifdef CONFIG_FSL_DEEP_SLEEP + fsl_dp_ddr_restore(); +#endif + + erratum_a008850_post(); + + return dram_size; +} + +void dram_init_banksize(void) +{ + /* + * gd->arch.secure_ram tracks the location of secure memory. + * It was set as if the memory starts from 0. + * The address needs to add the offset of its bank. + */ + gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; + if (gd->ram_size > CONFIG_SYS_DDR_BLOCK1_SIZE) { + gd->bd->bi_dram[0].size = CONFIG_SYS_DDR_BLOCK1_SIZE; + gd->bd->bi_dram[1].start = CONFIG_SYS_DDR_BLOCK2_BASE; + gd->bd->bi_dram[1].size = gd->ram_size - + CONFIG_SYS_DDR_BLOCK1_SIZE; +#ifdef CONFIG_SYS_MEM_RESERVE_SECURE + gd->arch.secure_ram = gd->bd->bi_dram[1].start + + gd->arch.secure_ram - + CONFIG_SYS_DDR_BLOCK1_SIZE; + gd->arch.secure_ram |= MEM_RESERVE_SECURE_MAINTAINED; +#endif + } else { + gd->bd->bi_dram[0].size = gd->ram_size; +#ifdef CONFIG_SYS_MEM_RESERVE_SECURE + gd->arch.secure_ram = gd->bd->bi_dram[0].start + + gd->arch.secure_ram; + gd->arch.secure_ram |= MEM_RESERVE_SECURE_MAINTAINED; +#endif + } +} |