// SPDX-License-Identifier: GPL-2.0+
/*
 * Board specific initialization for AM654 EVM
 *
 * Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
 *      Lokesh Vutla <lokeshvutla@ti.com>
 *
 */

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

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

#define board_is_am65x_base_board()     board_ti_is("AM6-COMPROCEVM")

/* Daughter card presence detection signals */
enum {
        AM65X_EVM_APP_BRD_DET,
        AM65X_EVM_LCD_BRD_DET,
        AM65X_EVM_SERDES_BRD_DET,
        AM65X_EVM_HDMI_GPMC_BRD_DET,
        AM65X_EVM_BRD_DET_COUNT,
};

/* 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;

#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;
#endif

        return 0;
}

#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
#ifdef CONFIG_TARGET_AM654_A53_EVM
        if (!strcmp(name, "k3-am654-base-board"))
                return 0;
#endif

        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;
        }

#if defined(CONFIG_TI_SECURE_DEVICE)
        /* Make HW RNG reserved for secure world use */
        ret = fdt_disable_node(blob, "/interconnect@100000/trng@4e10000");
        if (ret) {
                printf("%s: disabling TRGN failed %d\n", __func__, ret);
                return ret;
        }
#endif

        return 0;
}
#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;
}

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", "AM6-COMPROCEVM", "E3");
        else
                printf("Board: %s rev %s\n", ep->name, ep->version);

        return 0;
}

static void setup_board_eeprom_env(void)
{
        char *name = "am65x";

        if (do_board_detect())
                goto invalid_eeprom;

        if (board_is_am65x_base_board())
                name = "am65x";
        else
                printf("Unidentified board claims %s in eeprom header\n",
                       board_ti_get_name());

invalid_eeprom:
        set_board_info_env_am6(name);
}

static int init_daughtercard_det_gpio(char *gpio_name, struct gpio_desc *desc)
{
        int ret;

        memset(desc, 0, sizeof(*desc));

        ret = dm_gpio_lookup_name(gpio_name, desc);
        if (ret < 0)
                return ret;

        /* Request GPIO, simply re-using the name as label */
        ret = dm_gpio_request(desc, gpio_name);
        if (ret < 0)
                return ret;

        return dm_gpio_set_dir_flags(desc, GPIOD_IS_IN);
}

static int probe_daughtercards(void)
{
        struct ti_am6_eeprom ep;
        struct gpio_desc board_det_gpios[AM65X_EVM_BRD_DET_COUNT];
        char mac_addr[DAUGHTER_CARD_NO_OF_MAC_ADDR][TI_EEPROM_HDR_ETH_ALEN];
        u8 mac_addr_cnt;
        char name_overlays[1024] = { 0 };
        int i, j;
        int ret;

        /*
         * Daughter card presence detection signal name to GPIO (via I2C I/O
         * expander @ address 0x38) name and EEPROM I2C address mapping.
         */
        const struct {
                char *gpio_name;
                u8 i2c_addr;
        } slot_map[AM65X_EVM_BRD_DET_COUNT] = {
                { "gpio@38_0", 0x52, }, /* AM65X_EVM_APP_BRD_DET */
                { "gpio@38_1", 0x55, }, /* AM65X_EVM_LCD_BRD_DET */
                { "gpio@38_2", 0x54, }, /* AM65X_EVM_SERDES_BRD_DET */
                { "gpio@38_3", 0x53, }, /* AM65X_EVM_HDMI_GPMC_BRD_DET */
        };

        /* Declaration of daughtercards to probe */
        const struct {
                u8 slot_index;          /* Slot the card is installed */
                char *card_name;        /* EEPROM-programmed card name */
                char *dtbo_name;        /* Device tree overlay to apply */
                u8 eth_offset;          /* ethXaddr MAC address index offset */
        } cards[] = {
                {
                        AM65X_EVM_APP_BRD_DET,
                        "AM6-GPAPPEVM",
                        "k3-am654-gp.dtbo",
                        0,
                },
                {
                        AM65X_EVM_APP_BRD_DET,
                        "AM6-IDKAPPEVM",
                        "k3-am654-idk.dtbo",
                        3,
                },
                {
                        AM65X_EVM_SERDES_BRD_DET,
                        "SER-PCIE2LEVM",
                        "k3-am654-pcie-usb2.dtbo",
                        0,
                },
                {
                        AM65X_EVM_SERDES_BRD_DET,
                        "SER-PCIEUSBEVM",
                        "k3-am654-pcie-usb3.dtbo",
                        0,
                },
                {
                        AM65X_EVM_LCD_BRD_DET,
                        "OLDI-LCD1EVM",
                        "k3-am654-evm-oldi-lcd1evm.dtbo",
                        0,
                },
        };

        /*
         * Initialize GPIO used for daughtercard slot presence detection and
         * keep the resulting handles in local array for easier access.
         */
        for (i = 0; i < AM65X_EVM_BRD_DET_COUNT; i++) {
                ret = init_daughtercard_det_gpio(slot_map[i].gpio_name,
                                                 &board_det_gpios[i]);
                if (ret < 0)
                        return ret;
        }

        for (i = 0; i < ARRAY_SIZE(cards); i++) {
                /* Obtain card-specific slot index and associated I2C address */
                u8 slot_index = cards[i].slot_index;
                u8 i2c_addr = slot_map[slot_index].i2c_addr;

                /*
                 * The presence detection signal is active-low, hence skip
                 * over this card slot if anything other than 0 is returned.
                 */
                ret = dm_gpio_get_value(&board_det_gpios[slot_index]);
                if (ret < 0)
                        return ret;
                else if (ret)
                        continue;

                /* 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) {
                        pr_err("Reading daughtercard EEPROM at 0x%02x failed %d\n",
                               i2c_addr, ret);
                        /*
                         * Even this is pretty serious let's just skip over
                         * this particular daughtercard, rather than ending
                         * the probing process altogether.
                         */
                        continue;
                }

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

                printf("Detected: %s rev %s\n", ep.name, ep.version);

                /*
                 * Populate any MAC addresses from daughtercard into the U-Boot
                 * environment, starting with a card-specific offset so we can
                 * have multiple 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",
                                                      cards[i].eth_offset + j,
                                                      (uchar *)mac_addr[j]);
                }

                /* Skip if no overlays are to be added */
                if (!strlen(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(cards[i].dtbo_name) + 2 >
                    sizeof(name_overlays))
                        return -ENOMEM;

                /* Append to our list of overlays */
                strcat(name_overlays, 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;
}

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

        setup_board_eeprom_env();

        /*
         * The first MAC address for ethernet a.k.a. ethernet0 comes from
         * efuse populated via the am654 gigabit eth switch subsystem driver.
         * All the other ones are populated via EEPROM, hence continue with
         * an index of 1.
         */
        board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt);

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

        return 0;
}