diff options
Diffstat (limited to 'board/freescale/ls1043ardb/ddr.c')
| -rw-r--r-- | board/freescale/ls1043ardb/ddr.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/board/freescale/ls1043ardb/ddr.c b/board/freescale/ls1043ardb/ddr.c new file mode 100644 index 0000000000..b181579e8e --- /dev/null +++ b/board/freescale/ls1043ardb/ddr.c @@ -0,0 +1,191 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <fsl_ddr_sdram.h> +#include <fsl_ddr_dimm_params.h> +#include "ddr.h" +#ifdef CONFIG_FSL_DEEP_SLEEP +#include <fsl_sleep.h> +#endif + +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 > 1) { + 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; + popts->cpo_override = pbsp->cpo_override; + popts->write_data_delay = + pbsp->write_data_delay; + 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); + + /* force DDR bus width to 32 bits */ + popts->data_bus_width = 1; + popts->otf_burst_chop_en = 0; + popts->burst_length = DDR_BL8; + + /* + * Factors to consider for half-strength driver enable: + * - number of DIMMs installed + */ + popts->half_strength_driver_enable = 1; + /* + * 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_OVRD(70); /* Vref = 70% */ +} + +/* DDR model number: MT40A512M8HX-093E */ +#ifdef CONFIG_SYS_DDR_RAW_TIMING +dimm_params_t ddr_raw_timing = { + .n_ranks = 1, + .rank_density = 2147483648u, + .capacity = 2147483648u, + .primary_sdram_width = 32, + .ec_sdram_width = 0, + .registered_dimm = 0, + .mirrored_dimm = 0, + .n_row_addr = 15, + .n_col_addr = 10, + .bank_addr_bits = 0, + .bank_group_bits = 2, + .edc_config = 0, + .burst_lengths_bitmask = 0x0c, + + .tckmin_x_ps = 938, + .tckmax_ps = 1500, + .caslat_x = 0x000DFA00, + .taa_ps = 13500, + .trcd_ps = 13500, + .trp_ps = 13500, + .tras_ps = 33000, + .trc_ps = 46500, + .trfc1_ps = 260000, + .trfc2_ps = 160000, + .trfc4_ps = 110000, + .tfaw_ps = 21000, + .trrds_ps = 3700, + .trrdl_ps = 5300, + .tccdl_ps = 5355, + .refresh_rate_ps = 7800000, + .dq_mapping[0] = 0x0, + .dq_mapping[1] = 0x0, + .dq_mapping[2] = 0x0, + .dq_mapping[3] = 0x0, + .dq_mapping[4] = 0x0, + .dq_mapping[5] = 0x0, + .dq_mapping[6] = 0x0, + .dq_mapping[7] = 0x0, + .dq_mapping[8] = 0x0, + .dq_mapping[9] = 0x0, + .dq_mapping[10] = 0x0, + .dq_mapping[11] = 0x0, + .dq_mapping[12] = 0x0, + .dq_mapping[13] = 0x0, + .dq_mapping[14] = 0x0, + .dq_mapping[15] = 0x0, + .dq_mapping[16] = 0x0, + .dq_mapping[17] = 0x0, + .dq_mapping_ors = 0, +}; + +int fsl_ddr_get_dimm_params(dimm_params_t *pdimm, + unsigned int controller_number, + unsigned int dimm_number) +{ + static const char dimm_model[] = "Fixed DDR on board"; + + if (((controller_number == 0) && (dimm_number == 0)) || + ((controller_number == 1) && (dimm_number == 0))) { + memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t)); + memset(pdimm->mpart, 0, sizeof(pdimm->mpart)); + memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1); + } + + return 0; +} +#endif + +phys_size_t initdram(int board_type) +{ + phys_size_t dram_size; + +#if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_SPL) + puts("Initializing DDR....\n"); + dram_size = fsl_ddr_sdram(); +#else + dram_size = fsl_ddr_sdram_size(); +#endif +#ifdef CONFIG_FSL_DEEP_SLEEP + fsl_dp_ddr_restore(); +#endif + + return dram_size; +} + +void dram_init_banksize(void) +{ + gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; + gd->bd->bi_dram[0].size = gd->ram_size; +} |