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/*
* Copyright 2011-2012 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/mmu.h>
#include <asm/immap_85xx.h>
#include <asm/processor.h>
#include <asm/fsl_ddr_sdram.h>
#include <asm/fsl_ddr_dimm_params.h>
#include <asm/io.h>
#include <asm/fsl_law.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SYS_DDR_RAW_TIMING
#define CONFIG_SYS_DRAM_SIZE 1024
fsl_ddr_cfg_regs_t ddr_cfg_regs_800 = {
.cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS,
.cs[0].config = CONFIG_SYS_DDR_CS0_CONFIG,
.cs[0].config_2 = CONFIG_SYS_DDR_CS0_CONFIG_2,
.timing_cfg_3 = CONFIG_SYS_DDR_TIMING_3_800,
.timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0_800,
.timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1_800,
.timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2_800,
.ddr_sdram_cfg = CONFIG_SYS_DDR_CONTROL,
.ddr_sdram_cfg_2 = CONFIG_SYS_DDR_CONTROL_2,
.ddr_sdram_mode = CONFIG_SYS_DDR_MODE_1_800,
.ddr_sdram_mode_2 = CONFIG_SYS_DDR_MODE_2_800,
.ddr_sdram_md_cntl = CONFIG_SYS_DDR_MODE_CONTROL,
.ddr_sdram_interval = CONFIG_SYS_DDR_INTERVAL_800,
.ddr_data_init = CONFIG_MEM_INIT_VALUE,
.ddr_sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CTRL_800,
.ddr_init_addr = CONFIG_SYS_DDR_INIT_ADDR,
.ddr_init_ext_addr = CONFIG_SYS_DDR_INIT_EXT_ADDR,
.timing_cfg_4 = CONFIG_SYS_DDR_TIMING_4,
.timing_cfg_5 = CONFIG_SYS_DDR_TIMING_5,
.ddr_zq_cntl = CONFIG_SYS_DDR_ZQ_CONTROL,
.ddr_wrlvl_cntl = CONFIG_SYS_DDR_WRLVL_CONTROL_800,
.ddr_sr_cntr = CONFIG_SYS_DDR_SR_CNTR,
.ddr_sdram_rcw_1 = CONFIG_SYS_DDR_RCW_1,
.ddr_sdram_rcw_2 = CONFIG_SYS_DDR_RCW_2
};
fixed_ddr_parm_t fixed_ddr_parm_0[] = {
{750, 850, &ddr_cfg_regs_800},
{0, 0, NULL}
};
unsigned long get_sdram_size(void)
{
return get_ram_size(CONFIG_SYS_DDR_SDRAM_BASE, CONFIG_SYS_DRAM_SIZE);
}
/*
* Fixed sdram init -- doesn't use serial presence detect.
*/
phys_size_t fixed_sdram(void)
{
int i;
char buf[32];
fsl_ddr_cfg_regs_t ddr_cfg_regs;
phys_size_t ddr_size;
ulong ddr_freq, ddr_freq_mhz;
ddr_freq = get_ddr_freq(0);
ddr_freq_mhz = ddr_freq / 1000000;
printf("Configuring DDR for %s MT/s data rate\n",
strmhz(buf, ddr_freq));
for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
(ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
memcpy(&ddr_cfg_regs, fixed_ddr_parm_0[i].ddr_settings,
sizeof(ddr_cfg_regs));
break;
}
}
if (fixed_ddr_parm_0[i].max_freq == 0) {
panic("Unsupported DDR data rate %s MT/s data rate\n",
strmhz(buf, ddr_freq));
}
ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, ddr_size,
LAW_TRGT_IF_DDR_1) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
return ddr_size;
}
#else /* CONFIG_SYS_DDR_RAW_TIMING */
/* Micron MT41J256M8HX-15E */
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 = 1870,
.caslat_x = 0x1e << 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)
{
const char dimm_model[] = "Fixed DDR on board";
if ((controller_number == 0) && (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;
}
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
int i;
popts->clk_adjust = 6;
popts->cpo_override = 0x1f;
popts->write_data_delay = 2;
popts->half_strength_driver_enable = 1;
/* Write leveling override */
popts->wrlvl_en = 1;
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0xf;
popts->wrlvl_start = 0x8;
popts->trwt_override = 1;
popts->trwt = 0;
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
popts->cs_local_opts[i].odt_rd_cfg = FSL_DDR_ODT_NEVER;
popts->cs_local_opts[i].odt_wr_cfg = FSL_DDR_ODT_CS;
}
}
#endif /* CONFIG_SYS_DDR_RAW_TIMING */
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