H616 DRAM settings parser

h616-dram.c

#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

struct dram_para {
	uint32_t clk;
	uint32_t type;
	uint32_t dx_odt;
	uint32_t dx_dri;
	uint32_t ca_dri;
	uint32_t odt_en;
	uint32_t para1;
	uint32_t para2;
	uint32_t mr0;
	uint32_t mr1;
	uint32_t mr2;
	uint32_t mr3;
	uint32_t mr4;
	uint32_t mr5;
	uint32_t mr6;
	uint32_t mr11;
	uint32_t mr12;
	uint32_t mr13;
	uint32_t mr14;
	uint32_t mr16;
	uint32_t mr17;
	uint32_t mr22;
	uint32_t tpr0;
	uint32_t tpr1;
	uint32_t tpr2;
	uint32_t tpr3;
	uint32_t tpr6;
	uint32_t tpr10;
	uint32_t tpr11;
	uint32_t tpr12;
	uint32_t tpr13;
};

struct header {
	uint32_t jump;
	char signature[8];
	uint32_t reserved[11];
};

int main(int argc, char** argv)
{
	struct dram_para dram;
	struct header hdr;
	FILE *f;

	if (argc < 2) {
		printf("Usage: %s <h616 spl file>\n", argv[0]);
		return 0;
        }

	f = fopen(argv[1], "rb");

	if (fread(&hdr, sizeof(hdr), 1, f) != 1) {
		printf("failed to read header\n");
		fclose(f);
		return 0;
	}

	if (strncmp(hdr.signature, "eGON.BT0", 8)) {
		printf("incorrect signature\n");
		fclose(f);
		return 0;
	}

	if (fread(&dram, sizeof(dram), 1, f) != 1) {
		printf("failed to read dram config\n");
		fclose(f);
		return 0;
	}

	fclose(f);

	printf("Vendor DRAM config for your H616 board is:\n");
	printf("dram_clk: %d\n", dram.clk);
	printf("dram_type: %d\n", dram.type);
	printf("dram_dx_odt: 0x%08x\n", dram.dx_odt);
	printf("dram_dx_dri: 0x%08x\n", dram.dx_dri);
	printf("dram_ca_dri: 0x%08x\n", dram.ca_dri);
	printf("dram_odt_en: 0x%08x\n", dram.odt_en);
	printf("dram_para1: 0x%08x\n", dram.para1);
	printf("dram_para2: 0x%08x\n", dram.para2);
	printf("dram_mr0: 0x%08x\n", dram.mr0);
	printf("dram_mr1: 0x%08x\n", dram.mr1);
	printf("dram_mr2: 0x%08x\n", dram.mr2);
	printf("dram_mr3: 0x%08x\n", dram.mr3);
	printf("dram_mr4: 0x%08x\n", dram.mr4);
	printf("dram_mr5: 0x%08x\n", dram.mr5);
	printf("dram_mr6: 0x%08x\n", dram.mr6);
	printf("dram_mr11: 0x%08x\n", dram.mr11);
	printf("dram_mr12: 0x%08x\n", dram.mr12);
	printf("dram_mr13: 0x%08x\n", dram.mr13);
	printf("dram_mr14: 0x%08x\n", dram.mr14);
	printf("dram_mr16: 0x%08x\n", dram.mr16);
	printf("dram_mr17: 0x%08x\n", dram.mr17);
	printf("dram_mr22: 0x%08x\n", dram.mr22);
	printf("dram_tpr0: 0x%08x\n", dram.tpr0);
	printf("dram_tpr1: 0x%08x\n", dram.tpr1);
	printf("dram_tpr2: 0x%08x\n", dram.tpr2);
	printf("dram_tpr3: 0x%08x\n", dram.tpr3);
	printf("dram_tpr6: 0x%08x\n", dram.tpr6);
	printf("dram_tpr10: 0x%08x\n", dram.tpr10);
	printf("dram_tpr11: 0x%08x\n", dram.tpr11);
	printf("dram_tpr12: 0x%08x\n", dram.tpr12);
	printf("dram_tpr13: 0x%08x\n\n", dram.tpr13);

	if (dram.type != 3) {
		printf("Only DDR3 is supported by mainline U-Boot\n");
		return 0;
	}

	printf("Use following settings for mainline U-Boot:\n");
	printf("CONFIG_DRAM_CLK=%d\n", dram.clk);

	/*
	 * ODT is always enabled in vendor DRAM code. I guess dram_odt_en
	 * parameter should tell if it's used or not
	 */
	printf("CONFIG_DRAM_ODT_EN=y\n");
	if (dram.tpr10 & 0x10000)
		printf("CONFIG_DRAM_SUN50I_H616_UNKNOWN_FEATURE=y\n");
	/*
	 * FIXME: is "if (dram.tpr10 & 0x80000)" check correct here? It's
	 * more likely that bit delay compensation should be always enabled.
	 */
	printf("CONFIG_DRAM_SUN50I_H616_BIT_DELAY_COMPENSATION=y\n");
	if (dram.tpr10 & 0x100000)
		printf("CONFIG_DRAM_SUN50I_H616_WRITE_LEVELING=y\n");
	if (dram.tpr10 & 0x200000)
		printf("CONFIG_DRAM_SUN50I_H616_READ_CALIBRATION=y\n");
	if (dram.tpr10 & 0x400000)
		printf("CONFIG_DRAM_SUN50I_H616_READ_TRAINING=y\n");
	if (dram.tpr10 & 0x800000)
		printf("CONFIG_DRAM_SUN50I_H616_WRITE_TRAINING=y\n");

	return 0;
}