// 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);
}

/*
 * 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[] = {
        {
                0x52,
                "J7X-GESI-EXP",
                "k3-j721s2-gesi-exp-board.dtbo",
                1,              /* Start populating from eth1addr */
        },
};

#define DAUGHTER_CARD_NO_OF_MAC_ADDR    5
static bool daughter_card_detect_flags[ARRAY_SIZE(ext_cards)];

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;

                if (!IS_ENABLED(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]);
                        }
                }
        }

        if (!IS_ENABLED(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);
        }

        return 0;
}
#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();
                probe_daughtercards();
        }

        return 0;
}

void spl_board_init(void)
{
}