board/ti/j721s2/evm.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Board specific initialization for J721S2 EVM
 *
 * Copyright (C) 2021 Texas Instruments Incorporated - http://www.ti.com/
 *	David Huang <d-huang@ti.com>
 *
 */

#include <common.h>
#include <env.h>
#include <fdt_support.h>
#include <generic-phy.h>
#include <image.h>
#include <init.h>
#include <log.h>
#include <net.h>
#include <asm/arch/hardware.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <spl.h>
#include <dm.h>
#include <dm/uclass-internal.h>
#include <dm/root.h>

#include "../common/board_detect.h"

DECLARE_GLOBAL_DATA_PTR;

int board_init(void)
{
	return 0;
}

int dram_init(void)
{
#ifdef CONFIG_PHYS_64BIT
	gd->ram_size = 0x100000000;
#else
	gd->ram_size = 0x80000000;
#endif

	return 0;
}

phys_size_t board_get_usable_ram_top(phys_size_t total_size)
{
#ifdef CONFIG_PHYS_64BIT
	/* Limit RAM used by U-Boot to the DDR low region */
	if (gd->ram_top > 0x100000000)
		return 0x100000000;
#endif

	return gd->ram_top;
}

int dram_init_banksize(void)
{
	/* Bank 0 declares the memory available in the DDR low region */
	gd->bd->bi_dram[0].start = CFG_SYS_SDRAM_BASE;
	gd->bd->bi_dram[0].size = 0x7fffffff;
	gd->ram_size = 0x80000000;

#ifdef CONFIG_PHYS_64BIT
	/* Bank 1 declares the memory available in the DDR high region */
	gd->bd->bi_dram[1].start = CFG_SYS_SDRAM_BASE1;
	gd->bd->bi_dram[1].size = 0x37fffffff;
	gd->ram_size = 0x400000000;
#endif

	return 0;
}

#ifdef CONFIG_TI_I2C_BOARD_DETECT
/*
 * Functions specific to EVM and SK designs of J721S2/AM68 family.
 */

#define board_is_j721s2_som()	board_ti_k3_is("J721S2X-PM1-SOM")

#define board_is_am68_sk_som() board_ti_k3_is("AM68-SK-SOM")

int do_board_detect(void)
{
	int ret;

	if (board_ti_was_eeprom_read())
		return 0;

	ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
					 CONFIG_EEPROM_CHIP_ADDRESS);
	if (ret) {
		printf("EEPROM not available at 0x%02x, trying to read at 0x%02x\n",
		       CONFIG_EEPROM_CHIP_ADDRESS, CONFIG_EEPROM_CHIP_ADDRESS + 1);
		ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
						 CONFIG_EEPROM_CHIP_ADDRESS + 1);
		if (ret)
			pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
				CONFIG_EEPROM_CHIP_ADDRESS + 1, ret);
	}

	return ret;
}

int checkboard(void)
{
	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;

	if (do_board_detect())
		/* EEPROM not populated */
		printf("Board: %s rev %s\n", "J721S2X-PM1-SOM", "E1");
	else
		printf("Board: %s rev %s\n", ep->name, ep->version);

	return 0;
}

static void setup_board_eeprom_env(void)
{
	char *name = "j721s2";

	if (do_board_detect())
		goto invalid_eeprom;

	if (board_is_j721s2_som())
		name = "j721s2";
	else if (board_is_am68_sk_som())
		name = "am68-sk";
	else
		printf("Unidentified board claims %s in eeprom header\n",
		       board_ti_get_name());

invalid_eeprom:
	set_board_info_env_am6(name);
}

static void setup_serial(void)
{
	struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
	unsigned long board_serial;
	char *endp;
	char serial_string[17] = { 0 };

	if (env_get("serial#"))
		return;

	board_serial = simple_strtoul(ep->serial, &endp, 16);
	if (*endp != '\0') {
		pr_err("Error: Can't set serial# to %s\n", ep->serial);
		return;
	}

	snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
	env_set("serial#", serial_string);
}
#endif

/*
 * This function chooses the right dtb based on the board name read from
 * EEPROM if the EEPROM is programmed. Also, by default the boot chooses
 * the EVM DTB if there is no EEPROM is programmed or not detected.
 */
#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
	bool eeprom_read = board_ti_was_eeprom_read();

	if (!eeprom_read || board_is_j721s2_som()) {
		if (!strcmp(name, "k3-j721s2-common-proc-board"))
			return 0;
	} else if (!eeprom_read || board_is_am68_sk_som()) {
		if (!strcmp(name, "k3-am68-sk-base-board"))
			return 0;
	}

	return -1;
}
#endif

int board_late_init(void)
{
	if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
		setup_board_eeprom_env();
		setup_serial();
	}

	return 0;
}

void spl_board_init(void)
{
}