sdram_configs.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <boardid.h>
#include <cbfs.h>
#include <console/console.h>
#include <gpio.h>
#include <soc/sdram.h>
#include <string.h>
#include <types.h>
 
static const char *sdram_configs[] = {
 
        /* Samsung K4E6E304EB-EGCE */
        [0] = "sdram-lpddr3-generic-4GB",
 
        /* Hynix H9CCNNNBJTALAR */
        [1] = "sdram-lpddr3-generic-4GB",
 
        /* Samsung K4E8E324EB-EGCF */
        [3] = "sdram-lpddr3-generic-2GB",
 
        /* Micron MT52L256M32D1PF */
        [4] = "sdram-lpddr3-generic-2GB",
 
        /* Samsung K4E6E304EB-EGCE, duplicate to 0 */
        [5] = "sdram-lpddr3-generic-4GB",
 
        /* Micron MT52L512M32D2PF */
        [6] = "sdram-lpddr3-generic-4GB",
};
 
static struct rk3399_sdram_params params;
 
enum dram_speeds {
        dram_800MHz = 800,
        dram_928MHz = 928,
};
 
static enum dram_speeds get_sdram_target_mhz(void)
{
        if (CONFIG(BOARD_GOOGLE_BOB) && board_id() < 4)
                return dram_800MHz;
 
        return dram_928MHz;
}
 
const struct rk3399_sdram_params *get_sdram_config()
{
        char config_file[64];
        uint32_t ramcode;
 
        ramcode = ram_code();
        if (ramcode >= ARRAY_SIZE(sdram_configs) ||
            !snprintf(config_file, sizeof(config_file), "%s-%d",
            sdram_configs[ramcode], get_sdram_target_mhz()) ||
            (cbfs_load(config_file, &params, sizeof(params)) != sizeof(params)))
                die("Cannot load SDRAM parameter file!");
 
        return &params;
}