diff options
Diffstat (limited to 'board/freescale/ls1021aqds/ddr.c')
| -rw-r--r-- | board/freescale/ls1021aqds/ddr.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/board/freescale/ls1021aqds/ddr.c b/board/freescale/ls1021aqds/ddr.c new file mode 100644 index 0000000000..679c654fb5 --- /dev/null +++ b/board/freescale/ls1021aqds/ddr.c @@ -0,0 +1,159 @@ +/* + * Copyright 2014 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" + +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; + 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; + popts->cswl_override = DDR_CSWL_CS0; + + /* + * Rtt and Rtt_WR override + */ + popts->rtt_override = 0; + + /* Enable ZQ calibration */ + popts->zq_en = 1; + + /* DHC_EN =1, ODT = 75 Ohm */ + popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm); + popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm); +} + +#ifdef CONFIG_SYS_DDR_RAW_TIMING +dimm_params_t ddr_raw_timing = { + .n_ranks = 1, + .rank_density = 1073741824u, + .capacity = 1073741824u, + .primary_sdram_width = 32, + .ec_sdram_width = 0, + .registered_dimm = 0, + .mirrored_dimm = 0, + .n_row_addr = 15, + .n_col_addr = 10, + .n_banks_per_sdram_device = 8, + .edc_config = 0, + .burst_lengths_bitmask = 0x0c, + + .tckmin_x_ps = 1071, + .caslat_x = 0xfe << 4, /* 5,6,7,8 */ + .taa_ps = 13125, + .twr_ps = 15000, + .trcd_ps = 13125, + .trrd_ps = 7500, + .trp_ps = 13125, + .tras_ps = 37500, + .trc_ps = 50625, + .trfc_ps = 160000, + .twtr_ps = 7500, + .trtp_ps = 7500, + .refresh_rate_ps = 7800000, + .tfaw_ps = 37500, +}; + +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; + + puts("Initializing DDR....using SPD\n"); + dram_size = fsl_ddr_sdram(); + + 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; +} |