+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2010 Freescale Semiconductor, Inc.
* Authors: Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
* Timur Tabi <timur@freescale.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
*/
#include <common.h>
-#include <i2c.h>
-#include <asm/fsl_ddr_sdram.h>
-#include <asm/fsl_ddr_dimm_params.h>
+#include <fsl_ddr_sdram.h>
+#include <fsl_ddr_dimm_params.h>
-void fsl_ddr_get_spd(ddr3_spd_eeprom_t *ctrl_dimms_spd, unsigned int ctrl_num)
-{
- int ret;
-
- /*
- * The P1022 has only one DDR controller, and the board has only one
- * DIMM slot.
- */
- ret = i2c_read(SPD_EEPROM_ADDRESS1, 0, 1, (u8 *)ctrl_dimms_spd,
- sizeof(ddr3_spd_eeprom_t));
- if (ret) {
- debug("DDR: failed to read SPD from address %u\n",
- SPD_EEPROM_ADDRESS1);
- memset(ctrl_dimms_spd, 0, sizeof(ddr3_spd_eeprom_t));
- }
-}
-
-typedef struct {
- u32 datarate_mhz_low;
- u32 datarate_mhz_high;
+struct board_specific_parameters {
u32 n_ranks;
+ u32 datarate_mhz_high;
u32 clk_adjust; /* Range: 0-8 */
u32 cpo; /* Range: 2-31 */
u32 write_data_delay; /* Range: 0-6 */
- u32 force_2T;
-} board_specific_parameters_t;
+ u32 force_2t;
+};
-static const board_specific_parameters_t bsp[] = {
/*
- * lo| hi| num| clk| cpo|wrdata|2T
- * mhz| mhz|ranks|adjst| | delay|
+ * This table contains all valid speeds we want to override with board
+ * specific parameters. datarate_mhz_high values need to be in ascending order
+ * for each n_ranks group.
*/
- { 0, 333, 1, 5, 31, 3, 0},
- {334, 400, 1, 5, 31, 3, 0},
- {401, 549, 1, 5, 31, 3, 0},
- {550, 680, 1, 5, 31, 5, 0},
- {681, 850, 1, 5, 31, 5, 0},
- { 0, 333, 2, 5, 31, 3, 0},
- {334, 400, 2, 5, 31, 3, 0},
- {401, 549, 2, 5, 31, 3, 0},
- {550, 680, 2, 5, 31, 5, 0},
- {681, 850, 2, 5, 31, 5, 0},
+static const struct board_specific_parameters dimm0[] = {
+ /*
+ * memory controller 0
+ * num| hi| clk| cpo|wrdata|2T
+ * ranks| mhz|adjst| | delay|
+ */
+ {1, 549, 5, 31, 3, 0},
+ {1, 850, 5, 31, 5, 0},
+ {2, 549, 5, 31, 3, 0},
+ {2, 850, 5, 31, 5, 0},
+ {}
};
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;
unsigned long ddr_freq;
unsigned int i;
+
+ if (ctrl_num) {
+ printf("Wrong parameter for controller number %d", ctrl_num);
+ return;
+ }
+ if (!pdimm->n_ranks)
+ return;
+
/* set odt_rd_cfg and odt_wr_cfg. */
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
popts->cs_local_opts[i].odt_rd_cfg = 0;
popts->cs_local_opts[i].odt_wr_cfg = 1;
}
+ pbsp = dimm0;
/*
* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
* freqency and n_banks specified in board_specific_parameters table.
*/
ddr_freq = get_ddr_freq(0) / 1000000;
- for (i = 0; i < ARRAY_SIZE(bsp); i++) {
- if (ddr_freq >= bsp[i].datarate_mhz_low &&
- ddr_freq <= bsp[i].datarate_mhz_high &&
- pdimm->n_ranks == bsp[i].n_ranks) {
- popts->clk_adjust = bsp[i].clk_adjust;
- popts->cpo_override = bsp[i].cpo;
- popts->write_data_delay = bsp[i].write_data_delay;
- popts->twoT_en = bsp[i].force_2T;
- break;
+ 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->cpo_override = pbsp->cpo;
+ popts->write_data_delay =
+ pbsp->write_data_delay;
+ popts->twot_en = pbsp->force_2t;
+ goto found;
+ }
+ pbsp_highest = pbsp;
}
+ pbsp++;
+ }
+
+ if (pbsp_highest) {
+ printf("Error: board specific timing not found "
+ "for data rate %lu MT/s!\n"
+ "Trying to use the highest speed (%u) parameters\n",
+ ddr_freq, pbsp_highest->datarate_mhz_high);
+ popts->clk_adjust = pbsp->clk_adjust;
+ popts->cpo_override = pbsp->cpo;
+ popts->write_data_delay = pbsp->write_data_delay;
+ popts->twot_en = pbsp->force_2t;
+ } else {
+ panic("DIMM is not supported by this board");
}
+found:
popts->half_strength_driver_enable = 1;
/* Per AN4039, enable ZQ calibration. */