u-boot-brain/board/ti/j721e/evm.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Board specific initialization for J721E EVM
 *
 * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
 *	Lokesh Vutla <lokeshvutla@ti.com>
 *
 */

#include <common.h>
#include <init.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/hardware.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <spl.h>
#include <asm/arch/sys_proto.h>

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

#define board_is_j721e_som()	(board_ti_k3_is("J721EX-PM1-SOM") || \
				 board_ti_k3_is("J721EX-PM2-SOM"))

/* Max number of MAC addresses that are parsed/processed per daughter card */
#define DAUGHTER_CARD_NO_OF_MAC_ADDR	8

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;
}

ulong board_get_usable_ram_top(ulong 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 = CONFIG_SYS_SDRAM_BASE;
	gd->bd->bi_dram[0].size = 0x80000000;
	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 = CONFIG_SYS_SDRAM_BASE1;
	gd->bd->bi_dram[1].size = 0x80000000;
	gd->ram_size = 0x100000000;
#endif

	return 0;
}

#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
	if (!strcmp(name, "k3-j721e-common-proc-board"))
		return 0;

	return -1;
}
#endif

#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, bd_t *bd)
{
	int ret;

	ret = fdt_fixup_msmc_ram(blob, "/interconnect@100000", "sram@70000000");
	if (ret)
		printf("%s: fixing up msmc ram failed %d\n", __func__, ret);

	return ret;
}
#endif

int do_board_detect(void)
{
	int ret;

	ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
					 CONFIG_EEPROM_CHIP_ADDRESS);
	if (ret)
		pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
		       CONFIG_EEPROM_CHIP_ADDRESS, ret);

	return ret;
}

static void setup_board_eeprom_env(void)
{
	char *name = "j721e";

	if (do_board_detect())
		goto invalid_eeprom;

	if (board_is_j721e_som())
		name = "j721e";
	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);
}

/*
 * Declaration of daughtercards to probe. Note that when adding more
 * cards they should be grouped by the 'i2c_addr' field to allow for a
 * more efficient probing process.
 */
static const struct {
	u8 i2c_addr;		/* I2C address of card EEPROM */
	char *card_name;	/* EEPROM-programmed card name */
	char *dtbo_name;	/* Device tree overlay to apply */
	u8 eth_offset;		/* ethXaddr MAC address index offset */
} ext_cards[] = {
	{
		0x51,
		"J7X-BASE-CPB",
		"",		/* No dtbo for this board */
		0,
	},
	{
		0x52,
		"J7X-INFOTAN-EXP",
		"",		/* No dtbo for this board */
		0,
	},
	{
		0x52,
		"J7X-GESI-EXP",
		"",		/* No dtbo for this board */
		5,		/* Start populating from eth5addr */
	},
	{
		0x54,
		"J7X-VSC8514-ETH",
		"",		/* No dtbo for this board */
		1,		/* Start populating from eth1addr */
	},
};

static bool daughter_card_detect_flags[ARRAY_SIZE(ext_cards)];

const char *board_fit_get_additionnal_images(int index, const char *type)
{
	int i, j;

	if (strcmp(type, FIT_FDT_PROP))
		return NULL;

	j = 0;
	for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
		if (daughter_card_detect_flags[i]) {
			if (j == index) {
				/*
				 * Return dtbo name only if populated,
				 * otherwise stop parsing here.
				 */
				if (strlen(ext_cards[i].dtbo_name))
					return ext_cards[i].dtbo_name;
				else
					return NULL;
			};

			j++;
		}
	}

	return NULL;
}

static int probe_daughtercards(void)
{
	char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
	bool eeprom_read_success;
	struct ti_am6_eeprom ep;
	u8 previous_i2c_addr;
	u8 mac_addr_cnt;
	int i;
	int ret;

	/* Mark previous I2C address variable as not populated */
	previous_i2c_addr = 0xff;

	/* No EEPROM data was read yet */
	eeprom_read_success = false;

	/* Iterate through list of daughtercards */
	for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
		/* Obtain card-specific I2C address */
		u8 i2c_addr = ext_cards[i].i2c_addr;

		/* Read card EEPROM if not already read previously */
		if (i2c_addr != previous_i2c_addr) {
			/* Store I2C address so we can avoid reading twice */
			previous_i2c_addr = i2c_addr;

			/* Get and parse the daughter card EEPROM record */
			ret = ti_i2c_eeprom_am6_get(CONFIG_EEPROM_BUS_ADDRESS,
						    i2c_addr,
						    &ep,
						    (char **)mac_addr,
						    DAUGHTER_CARD_NO_OF_MAC_ADDR,
						    &mac_addr_cnt);
			if (ret) {
				debug("%s: No daughtercard EEPROM at 0x%02x found %d\n",
				      __func__, i2c_addr, ret);
				eeprom_read_success = false;
				/* Skip to the next daughtercard to probe */
				continue;
			}

			/* EEPROM read successful, okay to further process. */
			eeprom_read_success = true;
		}

		/* Only continue processing if EEPROM data was read */
		if (!eeprom_read_success)
			continue;

		/* Only process the parsed data if we found a match */
		if (strncmp(ep.name, ext_cards[i].card_name, sizeof(ep.name)))
			continue;

		printf("Detected: %s rev %s\n", ep.name, ep.version);
		daughter_card_detect_flags[i] = true;

#ifndef CONFIG_SPL_BUILD
		int j;
		/*
		 * Populate any MAC addresses from daughtercard into the U-Boot
		 * environment, starting with a card-specific offset so we can
		 * have multiple ext_cards contribute to the MAC pool in a well-
		 * defined manner.
		 */
		for (j = 0; j < mac_addr_cnt; j++) {
			if (!is_valid_ethaddr((u8 *)mac_addr[j]))
				continue;

			eth_env_set_enetaddr_by_index("eth",
						      ext_cards[i].eth_offset + j,
						      (uchar *)mac_addr[j]);
		}
#endif
	}
#ifndef CONFIG_SPL_BUILD
	char name_overlays[1024] = { 0 };

	for (i = 0; i < ARRAY_SIZE(ext_cards); i++) {
		if (!daughter_card_detect_flags[i])
			continue;

		/* Skip if no overlays are to be added */
		if (!strlen(ext_cards[i].dtbo_name))
			continue;

		/*
		 * Make sure we are not running out of buffer space by checking
		 * if we can fit the new overlay, a trailing space to be used
		 * as a separator, plus the terminating zero.
		 */
		if (strlen(name_overlays) + strlen(ext_cards[i].dtbo_name) + 2 >
		    sizeof(name_overlays))
			return -ENOMEM;

		/* Append to our list of overlays */
		strcat(name_overlays, ext_cards[i].dtbo_name);
		strcat(name_overlays, " ");
	}

	/* Apply device tree overlay(s) to the U-Boot environment, if any */
	if (strlen(name_overlays))
		return env_set("name_overlays", name_overlays);
#endif

	return 0;
}

int board_late_init(void)
{
	setup_board_eeprom_env();
	setup_serial();

	/* Check for and probe any plugged-in daughtercards */
	probe_daughtercards();

	return 0;
}

void spl_board_init(void)
{
	probe_daughtercards();
}