/*
 * (C) Copyright 2012
 * Corscience GmbH & Co. KG, <www.corscience.de>
 * Thomas Weber <weber@corscience.de>
 * Sunil Kumar <sunilsaini05@gmail.com>
 * Shashi Ranjan <shashiranjanmca05@gmail.com>
 *
 * Derived from Devkit8000 code by
 * Frederik Kriewitz <frederik@kriewitz.eu>
 *
 * SPDX-License-Identifier:     GPL-2.0+
 */
#include <common.h>
#include <twl4030.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/mem.h>
#include "tricorder.h"
#include "tricorder-eeprom.h"

DECLARE_GLOBAL_DATA_PTR;

/*
 * Routine: board_init
 * Description: Early hardware init.
 */
int board_init(void)
{
        gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
        /* boot param addr */
        gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);

        return 0;
}

/**
 * get_eeprom - read the eeprom
 *
 * @eeprom - pointer to a eeprom struct to fill
 *
 * This function will panic() on wrong EEPROM content
 */
static void get_eeprom(struct tricorder_eeprom *eeprom)
{
        int ret;

        if (!eeprom)
                panic("No eeprom given!\n");

        ret = gpio_request(7, "BMS");
        if (ret)
                panic("gpio: requesting BMS pin failed\n");

        ret = gpio_direction_input(7);
        if (ret)
                panic("gpio: set BMS as input failed\n");

        ret = gpio_get_value(7);
        if (ret < 0)
                panic("gpio: get BMS pin state failed\n");

        gpio_free(7);

        if (ret == 0) {
                /* BMS is _not_ set, do the EEPROM check */
                ret = tricorder_get_eeprom(0x51, eeprom);
                if (!ret) {
                        if (strncmp(eeprom->board_name, "CS10411", 7) != 0)
                                panic("Wrong board name '%.*s'\n",
                                      sizeof(eeprom->board_name),
                                                eeprom->board_name);
                        if (eeprom->board_version[0] < 'D')
                                panic("Wrong board version '%.*s'\n",
                                      sizeof(eeprom->board_version),
                                                eeprom->board_version);
                } else {
                        panic("Could not get board revision\n");
                }
        } else {
                memset(eeprom, 0, TRICORDER_EEPROM_SIZE);
        }
}

/**
 * print_hwversion - print out a HW version string
 *
 * @eeprom - pointer to the eeprom
 */
static void print_hwversion(struct tricorder_eeprom *eeprom)
{
        size_t len;
        if (!eeprom)
                panic("No eeprom given!");

        printf("Board %.*s:%.*s serial %.*s",
               sizeof(eeprom->board_name), eeprom->board_name,
               sizeof(eeprom->board_version), eeprom->board_version,
               sizeof(eeprom->board_serial), eeprom->board_serial);

        len = strnlen(eeprom->interface_version,
                      sizeof(eeprom->interface_version));
        if (len > 0)
                printf(" HW interface version %.*s",
                       sizeof(eeprom->interface_version),
                       eeprom->interface_version);
        puts("\n");
}

/*
 * Routine: misc_init_r
 * Description: Configure board specific parts
 */
int misc_init_r(void)
{
        struct tricorder_eeprom eeprom;
        get_eeprom(&eeprom);
        print_hwversion(&eeprom);

        twl4030_power_init();
        status_led_set(0, CONFIG_LED_STATUS_ON);
        status_led_set(1, CONFIG_LED_STATUS_ON);
        status_led_set(2, CONFIG_LED_STATUS_ON);

        omap_die_id_display();

        return 0;
}

/*
 * Routine: set_muxconf_regs
 * Description: Setting up the configuration Mux registers specific to the
 *              hardware. Many pins need to be moved from protect to primary
 *              mode.
 */
void set_muxconf_regs(void)
{
        MUX_TRICORDER();
}

#if defined(CONFIG_GENERIC_MMC)
int board_mmc_init(bd_t *bis)
{
        return omap_mmc_init(0, 0, 0, -1, -1);
}
#endif

#if defined(CONFIG_GENERIC_MMC)
void board_mmc_power_init(void)
{
        twl4030_power_mmc_init(0);
}
#endif

/*
 * Routine: get_board_mem_timings
 * Description: If we use SPL then there is no x-loader nor config header
 * so we have to setup the DDR timings ourself on the first bank.  This
 * provides the timing values back to the function that configures
 * the memory.  We have either one or two banks of 128MB DDR.
 */
void get_board_mem_timings(struct board_sdrc_timings *timings)
{
        struct tricorder_eeprom eeprom;
        get_eeprom(&eeprom);

        /* General SDRC config */
        if (eeprom.board_version[0] > 'D') {
                /* use optimized timings for our SDRAM device */
                timings->mcfg = MCFG((256 << 20), 14);
#define MT46H64M32_TDAL  6      /* Twr/Tck + Trp/tck            */
                                /* 15/6 + 18/6 = 5.5 -> 6       */
#define MT46H64M32_TDPL  3      /* 15/6 = 2.5 -> 3 (Twr)        */
#define MT46H64M32_TRRD  2      /* 12/6 = 2                     */
#define MT46H64M32_TRCD  3      /* 18/6 = 3                     */
#define MT46H64M32_TRP   3      /* 18/6 = 3                     */
#define MT46H64M32_TRAS  7      /* 42/6 = 7                     */
#define MT46H64M32_TRC  10      /* 60/6 = 10                    */
#define MT46H64M32_TRFC 12      /* 72/6 = 12                    */
                timings->ctrla = ACTIM_CTRLA(MT46H64M32_TRFC, MT46H64M32_TRC,
                                             MT46H64M32_TRAS, MT46H64M32_TRP,
                                             MT46H64M32_TRCD, MT46H64M32_TRRD,
                                             MT46H64M32_TDPL,
                                             MT46H64M32_TDAL);

#define MT46H64M32_TWTR 1
#define MT46H64M32_TCKE 1
#define MT46H64M32_XSR 19       /* 112.5/6 = 18.75 => ~19       */
#define MT46H64M32_TXP 1
                timings->ctrlb = ACTIM_CTRLB(MT46H64M32_TWTR, MT46H64M32_TCKE,
                                             MT46H64M32_TXP, MT46H64M32_XSR);

                timings->mr = MICRON_V_MR_165;
                timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
        } else {
                /* use conservative beagleboard timings as default */
                timings->mcfg = MICRON_V_MCFG_165(128 << 20);
                timings->ctrla = MICRON_V_ACTIMA_165;
                timings->ctrlb = MICRON_V_ACTIMB_165;
                timings->mr = MICRON_V_MR_165;
                timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
        }
}