// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2008-2016 Freescale Semiconductor, Inc.
 * Copyright 2017-2020 NXP Semiconductor
 */

/*
 * Generic driver for Freescale DDR/DDR2/DDR3/DDR4 memory controller.
 * Based on code from spd_sdram.c
 * Author: James Yang [at freescale.com]
 */

#include <common.h>
#include <fsl_ddr_sdram.h>
#include <fsl_errata.h>
#include <fsl_ddr.h>
#include <fsl_immap.h>
#include <log.h>
#include <asm/bitops.h>
#include <asm/io.h>
#if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \
        defined(CONFIG_ARM)
#include <asm/arch/clock.h>
#endif

/*
 * Determine Rtt value.
 *
 * This should likely be either board or controller specific.
 *
 * Rtt(nominal) - DDR2:
 *      0 = Rtt disabled
 *      1 = 75 ohm
 *      2 = 150 ohm
 *      3 = 50 ohm
 * Rtt(nominal) - DDR3:
 *      0 = Rtt disabled
 *      1 = 60 ohm
 *      2 = 120 ohm
 *      3 = 40 ohm
 *      4 = 20 ohm
 *      5 = 30 ohm
 *
 * FIXME: Apparently 8641 needs a value of 2
 * FIXME: Old code seys if 667 MHz or higher, use 3 on 8572
 *
 * FIXME: There was some effort down this line earlier:
 *
 *      unsigned int i;
 *      for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL/2; i++) {
 *              if (popts->dimmslot[i].num_valid_cs
 *                  && (popts->cs_local_opts[2*i].odt_rd_cfg
 *                      || popts->cs_local_opts[2*i].odt_wr_cfg)) {
 *                      rtt = 2;
 *                      break;
 *              }
 *      }
 */
static inline int fsl_ddr_get_rtt(void)
{
        int rtt;

#if defined(CONFIG_SYS_FSL_DDR1)
        rtt = 0;
#elif defined(CONFIG_SYS_FSL_DDR2)
        rtt = 3;
#else
        rtt = 0;
#endif

        return rtt;
}

#ifdef CONFIG_SYS_FSL_DDR4
/*
 * compute CAS write latency according to DDR4 spec
 * CWL = 9 for <= 1600MT/s
 *       10 for <= 1866MT/s
 *       11 for <= 2133MT/s
 *       12 for <= 2400MT/s
 *       14 for <= 2667MT/s
 *       16 for <= 2933MT/s
 *       18 for higher
 */
static inline unsigned int compute_cas_write_latency(
                                const unsigned int ctrl_num)
{
        unsigned int cwl;
        const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
        if (mclk_ps >= 1250)
                cwl = 9;
        else if (mclk_ps >= 1070)
                cwl = 10;
        else if (mclk_ps >= 935)
                cwl = 11;
        else if (mclk_ps >= 833)
                cwl = 12;
        else if (mclk_ps >= 750)
                cwl = 14;
        else if (mclk_ps >= 681)
                cwl = 16;
        else
                cwl = 18;

        return cwl;
}
#else
/*
 * compute the CAS write latency according to DDR3 spec
 * CWL = 5 if tCK >= 2.5ns
 *       6 if 2.5ns > tCK >= 1.875ns
 *       7 if 1.875ns > tCK >= 1.5ns
 *       8 if 1.5ns > tCK >= 1.25ns
 *       9 if 1.25ns > tCK >= 1.07ns
 *       10 if 1.07ns > tCK >= 0.935ns
 *       11 if 0.935ns > tCK >= 0.833ns
 *       12 if 0.833ns > tCK >= 0.75ns
 */
static inline unsigned int compute_cas_write_latency(
                                const unsigned int ctrl_num)
{
        unsigned int cwl;
        const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);

        if (mclk_ps >= 2500)
                cwl = 5;
        else if (mclk_ps >= 1875)
                cwl = 6;
        else if (mclk_ps >= 1500)
                cwl = 7;
        else if (mclk_ps >= 1250)
                cwl = 8;
        else if (mclk_ps >= 1070)
                cwl = 9;
        else if (mclk_ps >= 935)
                cwl = 10;
        else if (mclk_ps >= 833)
                cwl = 11;
        else if (mclk_ps >= 750)
                cwl = 12;
        else {
                cwl = 12;
                printf("Warning: CWL is out of range\n");
        }
        return cwl;
}
#endif

/* Chip Select Configuration (CSn_CONFIG) */
static void set_csn_config(int dimm_number, int i, fsl_ddr_cfg_regs_t *ddr,
                               const memctl_options_t *popts,
                               const dimm_params_t *dimm_params)
{
        unsigned int cs_n_en = 0; /* Chip Select enable */
        unsigned int intlv_en = 0; /* Memory controller interleave enable */
        unsigned int intlv_ctl = 0; /* Interleaving control */
        unsigned int ap_n_en = 0; /* Chip select n auto-precharge enable */
        unsigned int odt_rd_cfg = 0; /* ODT for reads configuration */
        unsigned int odt_wr_cfg = 0; /* ODT for writes configuration */
        unsigned int ba_bits_cs_n = 0; /* Num of bank bits for SDRAM on CSn */
        unsigned int row_bits_cs_n = 0; /* Num of row bits for SDRAM on CSn */
        unsigned int col_bits_cs_n = 0; /* Num of ocl bits for SDRAM on CSn */
        int go_config = 0;
#ifdef CONFIG_SYS_FSL_DDR4
        unsigned int bg_bits_cs_n = 0; /* Num of bank group bits */
#else
        unsigned int n_banks_per_sdram_device;
#endif

        /* Compute CS_CONFIG only for existing ranks of each DIMM.  */
        switch (i) {
        case 0:
                if (dimm_params[dimm_number].n_ranks > 0) {
                        go_config = 1;
                        /* These fields only available in CS0_CONFIG */
                        if (!popts->memctl_interleaving)
                                break;
                        switch (popts->memctl_interleaving_mode) {
                        case FSL_DDR_256B_INTERLEAVING:
                        case FSL_DDR_CACHE_LINE_INTERLEAVING:
                        case FSL_DDR_PAGE_INTERLEAVING:
                        case FSL_DDR_BANK_INTERLEAVING:
                        case FSL_DDR_SUPERBANK_INTERLEAVING:
                                intlv_en = popts->memctl_interleaving;
                                intlv_ctl = popts->memctl_interleaving_mode;
                                break;
                        default:
                                break;
                        }
                }
                break;
        case 1:
                if ((dimm_number == 0 && dimm_params[0].n_ranks > 1) || \
                    (dimm_number == 1 && dimm_params[1].n_ranks > 0))
                        go_config = 1;
                break;
        case 2:
                if ((dimm_number == 0 && dimm_params[0].n_ranks > 2) || \
                   (dimm_number >= 1 && dimm_params[dimm_number].n_ranks > 0))
                        go_config = 1;
                break;
        case 3:
                if ((dimm_number == 0 && dimm_params[0].n_ranks > 3) || \
                    (dimm_number == 1 && dimm_params[1].n_ranks > 1) || \
                    (dimm_number == 3 && dimm_params[3].n_ranks > 0))
                        go_config = 1;
                break;
        default:
                break;
        }
        if (go_config) {
                cs_n_en = 1;
                ap_n_en = popts->cs_local_opts[i].auto_precharge;
                odt_rd_cfg = popts->cs_local_opts[i].odt_rd_cfg;
                odt_wr_cfg = popts->cs_local_opts[i].odt_wr_cfg;
#ifdef CONFIG_SYS_FSL_DDR4
                ba_bits_cs_n = dimm_params[dimm_number].bank_addr_bits;
                bg_bits_cs_n = dimm_params[dimm_number].bank_group_bits;
#else
                n_banks_per_sdram_device
                        = dimm_params[dimm_number].n_banks_per_sdram_device;
                ba_bits_cs_n = __ilog2(n_banks_per_sdram_device) - 2;
#endif
                row_bits_cs_n = dimm_params[dimm_number].n_row_addr - 12;
                col_bits_cs_n = dimm_params[dimm_number].n_col_addr - 8;
        }
        ddr->cs[i].config = (0
                | ((cs_n_en & 0x1) << 31)
                | ((intlv_en & 0x3) << 29)
                | ((intlv_ctl & 0xf) << 24)
                | ((ap_n_en & 0x1) << 23)

                /* XXX: some implementation only have 1 bit starting at left */
                | ((odt_rd_cfg & 0x7) << 20)

                /* XXX: Some implementation only have 1 bit starting at left */
                | ((odt_wr_cfg & 0x7) << 16)

                | ((ba_bits_cs_n & 0x3) << 14)
                | ((row_bits_cs_n & 0x7) << 8)
#ifdef CONFIG_SYS_FSL_DDR4
                | ((bg_bits_cs_n & 0x3) << 4)
#endif
                | ((col_bits_cs_n & 0x7) << 0)
                );
        debug("FSLDDR: cs[%d]_config = 0x%08x\n", i,ddr->cs[i].config);
}

/* Chip Select Configuration 2 (CSn_CONFIG_2) */
/* FIXME: 8572 */
static void set_csn_config_2(int i, fsl_ddr_cfg_regs_t *ddr)
{
        unsigned int pasr_cfg = 0;      /* Partial array self refresh config */

        ddr->cs[i].config_2 = ((pasr_cfg & 7) << 24);
        debug("FSLDDR: cs[%d]_config_2 = 0x%08x\n", i, ddr->cs[i].config_2);
}

/* -3E = 667 CL5, -25 = CL6 800, -25E = CL5 800 */

#if !defined(CONFIG_SYS_FSL_DDR1)
/*
 * Check DIMM configuration, return 2 if quad-rank or two dual-rank
 * Return 1 if other two slots configuration. Return 0 if single slot.
 */
static inline int avoid_odt_overlap(const dimm_params_t *dimm_params)
{
#if CONFIG_DIMM_SLOTS_PER_CTLR == 1
        if (dimm_params[0].n_ranks == 4)
                return 2;
#endif

#if CONFIG_DIMM_SLOTS_PER_CTLR == 2
        if ((dimm_params[0].n_ranks == 2) &&
                (dimm_params[1].n_ranks == 2))
                return 2;

#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE
        if (dimm_params[0].n_ranks == 4)
                return 2;
#endif

        if ((dimm_params[0].n_ranks != 0) &&
            (dimm_params[2].n_ranks != 0))
                return 1;
#endif
        return 0;
}

/*
 * DDR SDRAM Timing Configuration 0 (TIMING_CFG_0)
 *
 * Avoid writing for DDR I.  The new PQ38 DDR controller
 * dreams up non-zero default values to be backwards compatible.
 */
static void set_timing_cfg_0(const unsigned int ctrl_num,
                                fsl_ddr_cfg_regs_t *ddr,
                                const memctl_options_t *popts,
                                const dimm_params_t *dimm_params)
{
        unsigned char trwt_mclk = 0;   /* Read-to-write turnaround */
        unsigned char twrt_mclk = 0;   /* Write-to-read turnaround */
        /* 7.5 ns on -3E; 0 means WL - CL + BL/2 + 1 */
        unsigned char trrt_mclk = 0;   /* Read-to-read turnaround */
        unsigned char twwt_mclk = 0;   /* Write-to-write turnaround */

        /* Active powerdown exit timing (tXARD and tXARDS). */
        unsigned char act_pd_exit_mclk;
        /* Precharge powerdown exit timing (tXP). */
        unsigned char pre_pd_exit_mclk;
        /* ODT powerdown exit timing (tAXPD). */
        unsigned char taxpd_mclk = 0;
        /* Mode register set cycle time (tMRD). */
        unsigned char tmrd_mclk;
#if defined(CONFIG_SYS_FSL_DDR4) || defined(CONFIG_SYS_FSL_DDR3)
        const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
#endif

#ifdef CONFIG_SYS_FSL_DDR4
        /* tXP=max(4nCK, 6ns) */
        int txp = max((int)mclk_ps * 4, 6000); /* unit=ps */
        unsigned int data_rate = get_ddr_freq(ctrl_num);

        /* for faster clock, need more time for data setup */
        trwt_mclk = (data_rate/1000000 > 1900) ? 3 : 2;

        /*
         * for single quad-rank DIMM and two-slot DIMMs
         * to avoid ODT overlap
         */
        switch (avoid_odt_overlap(dimm_params)) {
        case 2:
                twrt_mclk = 2;
                twwt_mclk = 2;
                trrt_mclk = 2;
                break;
        default:
                twrt_mclk = 1;
                twwt_mclk = 1;
                trrt_mclk = 0;
                break;
        }

        act_pd_exit_mclk = picos_to_mclk(ctrl_num, txp);
        pre_pd_exit_mclk = act_pd_exit_mclk;
        /*
         * MRS_CYC = max(tMRD, tMOD)
         * tMRD = 8nCK, tMOD = max(24nCK, 15ns)
         */
        tmrd_mclk = max(24U, picos_to_mclk(ctrl_num, 15000));
#elif defined(CONFIG_SYS_FSL_DDR3)
        unsigned int data_rate = get_ddr_freq(ctrl_num);
        int txp;
        unsigned int ip_rev;
        int odt_overlap;
        /*
         * (tXARD and tXARDS). Empirical?
         * The DDR3 spec has not tXARD,
         * we use the tXP instead of it.
         * tXP=max(3nCK, 7.5ns) for DDR3-800, 1066
         *     max(3nCK, 6ns) for DDR3-1333, 1600, 1866, 2133
         * spec has not the tAXPD, we use
         * tAXPD=1, need design to confirm.
         */
        txp = max((int)mclk_ps * 3, (mclk_ps > 1540 ? 7500 : 6000));

        ip_rev = fsl_ddr_get_version(ctrl_num);
        if (ip_rev >= 0x40700) {
                /*
                 * MRS_CYC = max(tMRD, tMOD)
                 * tMRD = 4nCK (8nCK for RDIMM)
                 * tMOD = max(12nCK, 15ns)
                 */
                tmrd_mclk = max((unsigned int)12,
                                picos_to_mclk(ctrl_num, 15000));
        } else {
                /*
                 * MRS_CYC = tMRD
                 * tMRD = 4nCK (8nCK for RDIMM)
                 */
                if (popts->registered_dimm_en)
                        tmrd_mclk = 8;
                else
                        tmrd_mclk = 4;
        }

        /* set the turnaround time */

        /*
         * for single quad-rank DIMM and two-slot DIMMs
         * to avoid ODT overlap
         */
        odt_overlap = avoid_odt_overlap(dimm_params);
        switch (odt_overlap) {
        case 2:
                twwt_mclk = 2;
                trrt_mclk = 1;
                break;
        case 1:
                twwt_mclk = 1;
                trrt_mclk = 0;
                break;
        default:
                break;
        }

        /* for faster clock, need more time for data setup */
        trwt_mclk = (data_rate/1000000 > 1800) ? 2 : 1;

        if ((data_rate/1000000 > 1150) || (popts->memctl_interleaving))
                twrt_mclk = 1;

        if (popts->dynamic_power == 0) {        /* powerdown is not used */
                act_pd_exit_mclk = 1;
                pre_pd_exit_mclk = 1;
                taxpd_mclk = 1;
        } else {
                /* act_pd_exit_mclk = tXARD, see above */
                act_pd_exit_mclk = picos_to_mclk(ctrl_num, txp);
                /* Mode register MR0[A12] is '1' - fast exit */
                pre_pd_exit_mclk = act_pd_exit_mclk;
                taxpd_mclk = 1;
        }
#else /* CONFIG_SYS_FSL_DDR2 */
        /*
         * (tXARD and tXARDS). Empirical?
         * tXARD = 2 for DDR2
         * tXP=2
         * tAXPD=8
         */
        act_pd_exit_mclk = 2;
        pre_pd_exit_mclk = 2;
        taxpd_mclk = 8;
        tmrd_mclk = 2;
#endif

        if (popts->trwt_override)
                trwt_mclk = popts->trwt;

        ddr->timing_cfg_0 = (0
                | ((trwt_mclk & 0x3) << 30)     /* RWT */
                | ((twrt_mclk & 0x3) << 28)     /* WRT */
                | ((trrt_mclk & 0x3) << 26)     /* RRT */
                | ((twwt_mclk & 0x3) << 24)     /* WWT */
                | ((act_pd_exit_mclk & 0xf) << 20)  /* ACT_PD_EXIT */
                | ((pre_pd_exit_mclk & 0xF) << 16)  /* PRE_PD_EXIT */
                | ((taxpd_mclk & 0xf) << 8)     /* ODT_PD_EXIT */
                | ((tmrd_mclk & 0x1f) << 0)     /* MRS_CYC */
                );
        debug("FSLDDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0);
}
#endif  /* !defined(CONFIG_SYS_FSL_DDR1) */

/* DDR SDRAM Timing Configuration 3 (TIMING_CFG_3) */
static void set_timing_cfg_3(const unsigned int ctrl_num,
                             fsl_ddr_cfg_regs_t *ddr,
                             const memctl_options_t *popts,
                             const common_timing_params_t *common_dimm,
                             unsigned int cas_latency,
                             unsigned int additive_latency)
{
        /* Extended precharge to activate interval (tRP) */
        unsigned int ext_pretoact = 0;
        /* Extended Activate to precharge interval (tRAS) */
        unsigned int ext_acttopre = 0;
        /* Extended activate to read/write interval (tRCD) */
        unsigned int ext_acttorw = 0;
        /* Extended refresh recovery time (tRFC) */
        unsigned int ext_refrec;
        /* Extended MCAS latency from READ cmd */
        unsigned int ext_caslat = 0;
        /* Extended additive latency */
        unsigned int ext_add_lat = 0;
        /* Extended last data to precharge interval (tWR) */
        unsigned int ext_wrrec = 0;
        /* Control Adjust */
        unsigned int cntl_adj = 0;

        ext_pretoact = picos_to_mclk(ctrl_num, common_dimm->trp_ps) >> 4;
        ext_acttopre = picos_to_mclk(ctrl_num, common_dimm->tras_ps) >> 4;
        ext_acttorw = picos_to_mclk(ctrl_num, common_dimm->trcd_ps) >> 4;
        ext_caslat = (2 * cas_latency - 1) >> 4;
        ext_add_lat = additive_latency >> 4;
#ifdef CONFIG_SYS_FSL_DDR4
        ext_refrec = (picos_to_mclk(ctrl_num, common_dimm->trfc1_ps) - 8) >> 4;
#else
        ext_refrec = (picos_to_mclk(ctrl_num, common_dimm->trfc_ps) - 8) >> 4;
        /* ext_wrrec only deals with 16 clock and above, or 14 with OTF */
#endif
        ext_wrrec = (picos_to_mclk(ctrl_num, common_dimm->twr_ps) +
                (popts->otf_burst_chop_en ? 2 : 0)) >> 4;

        ddr->timing_cfg_3 = (0
                | ((ext_pretoact & 0x1) << 28)
                | ((ext_acttopre & 0x3) << 24)
                | ((ext_acttorw & 0x1) << 22)
                | ((ext_refrec & 0x3F) << 16)
                | ((ext_caslat & 0x3) << 12)
                | ((ext_add_lat & 0x1) << 10)
                | ((ext_wrrec & 0x1) << 8)
                | ((cntl_adj & 0x7) << 0)
                );
        debug("FSLDDR: timing_cfg_3 = 0x%08x\n", ddr->timing_cfg_3);
}

/* DDR SDRAM Timing Configuration 1 (TIMING_CFG_1) */
static void set_timing_cfg_1(const unsigned int ctrl_num,
                             fsl_ddr_cfg_regs_t *ddr,
                             const memctl_options_t *popts,
                             const common_timing_params_t *common_dimm,
                             unsigned int cas_latency)
{
        /* Precharge-to-activate interval (tRP) */
        unsigned char pretoact_mclk;
        /* Activate to precharge interval (tRAS) */
        unsigned char acttopre_mclk;
        /*  Activate to read/write interval (tRCD) */
        unsigned char acttorw_mclk;
        /* CASLAT */
        unsigned char caslat_ctrl;
        /*  Refresh recovery time (tRFC) ; trfc_low */
        unsigned char refrec_ctrl;
        /* Last data to precharge minimum interval (tWR) */
        unsigned char wrrec_mclk;
        /* Activate-to-activate interval (tRRD) */
        unsigned char acttoact_mclk;
        /* Last write data pair to read command issue interval (tWTR) */
        unsigned char wrtord_mclk;
#ifdef CONFIG_SYS_FSL_DDR4
        /* DDR4 supports 10, 12, 14, 16, 18, 20, 24 */
        static const u8 wrrec_table[] = {
                10, 10, 10, 10, 10,
                10, 10, 10, 10, 10,
                12, 12, 14, 14, 16,
                16, 18, 18, 20, 20,
                24, 24, 24, 24};
#else
        /* DDR_SDRAM_MODE doesn't support 9,11,13,15 */
        static const u8 wrrec_table[] = {
                1, 2, 3, 4, 5, 6, 7, 8, 10, 10, 12, 12, 14, 14, 0, 0};
#endif

        pretoact_mclk = picos_to_mclk(ctrl_num, common_dimm->trp_ps);
        acttopre_mclk = picos_to_mclk(ctrl_num, common_dimm->tras_ps);
        acttorw_mclk = picos_to_mclk(ctrl_num, common_dimm->trcd_ps);

        /*
         * Translate CAS Latency to a DDR controller field value:
         *
         *      CAS Lat DDR I   DDR II  Ctrl
         *      Clocks  SPD Bit SPD Bit Value
         *      ------- ------- ------- -----
         *      1.0     0               0001
         *      1.5     1               0010
         *      2.0     2       2       0011
         *      2.5     3               0100
         *      3.0     4       3       0101
         *      3.5     5               0110
         *      4.0             4       0111
         *      4.5                     1000
         *      5.0             5       1001
         */
#if defined(CONFIG_SYS_FSL_DDR1)
        caslat_ctrl = (cas_latency + 1) & 0x07;
#elif defined(CONFIG_SYS_FSL_DDR2)
        caslat_ctrl = 2 * cas_latency - 1;
#else
        /*
         * if the CAS latency more than 8 cycle,
         * we need set extend bit for it at
         * TIMING_CFG_3[EXT_CASLAT]
         */
        if (fsl_ddr_get_version(ctrl_num) <= 0x40400)
                caslat_ctrl = 2 * cas_latency - 1;
        else
                caslat_ctrl = (cas_latency - 1) << 1;
#endif

#ifdef CONFIG_SYS_FSL_DDR4
        refrec_ctrl = picos_to_mclk(ctrl_num, common_dimm->trfc1_ps) - 8;
        wrrec_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
        acttoact_mclk = max(picos_to_mclk(ctrl_num, common_dimm->trrds_ps), 4U);
        wrtord_mclk = max(2U, picos_to_mclk(ctrl_num, 2500));
        if ((wrrec_mclk < 1) || (wrrec_mclk > 24))
                printf("Error: WRREC doesn't support %d clocks\n", wrrec_mclk);
        else
                wrrec_mclk = wrrec_table[wrrec_mclk - 1];
#else
        refrec_ctrl = picos_to_mclk(ctrl_num, common_dimm->trfc_ps) - 8;
        wrrec_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
        acttoact_mclk = picos_to_mclk(ctrl_num, common_dimm->trrd_ps);
        wrtord_mclk = picos_to_mclk(ctrl_num, common_dimm->twtr_ps);
        if ((wrrec_mclk < 1) || (wrrec_mclk > 16))
                printf("Error: WRREC doesn't support %d clocks\n", wrrec_mclk);
        else
                wrrec_mclk = wrrec_table[wrrec_mclk - 1];
#endif
        if (popts->otf_burst_chop_en)
                wrrec_mclk += 2;

        /*
         * JEDEC has min requirement for tRRD
         */
#if defined(CONFIG_SYS_FSL_DDR3)
        if (acttoact_mclk < 4)
                acttoact_mclk = 4;
#endif
        /*
         * JEDEC has some min requirements for tWTR
         */
#if defined(CONFIG_SYS_FSL_DDR2)
        if (wrtord_mclk < 2)
                wrtord_mclk = 2;
#elif defined(CONFIG_SYS_FSL_DDR3)
        if (wrtord_mclk < 4)
                wrtord_mclk = 4;
#endif
        if (popts->otf_burst_chop_en)
                wrtord_mclk += 2;

        ddr->timing_cfg_1 = (0
                | ((pretoact_mclk & 0x0F) << 28)
                | ((acttopre_mclk & 0x0F) << 24)
                | ((acttorw_mclk & 0xF) << 20)
                | ((caslat_ctrl & 0xF) << 16)
                | ((refrec_ctrl & 0xF) << 12)
                | ((wrrec_mclk & 0x0F) << 8)
                | ((acttoact_mclk & 0x0F) << 4)
                | ((wrtord_mclk & 0x0F) << 0)
                );
        debug("FSLDDR: timing_cfg_1 = 0x%08x\n", ddr->timing_cfg_1);
}

/* DDR SDRAM Timing Configuration 2 (TIMING_CFG_2) */
static void set_timing_cfg_2(const unsigned int ctrl_num,
                             fsl_ddr_cfg_regs_t *ddr,
                             const memctl_options_t *popts,
                             const common_timing_params_t *common_dimm,
                             unsigned int cas_latency,
                             unsigned int additive_latency)
{
        /* Additive latency */
        unsigned char add_lat_mclk;
        /* CAS-to-preamble override */
        unsigned short cpo;
        /* Write latency */
        unsigned char wr_lat;
        /*  Read to precharge (tRTP) */
        unsigned char rd_to_pre;
        /* Write command to write data strobe timing adjustment */
        unsigned char wr_data_delay;
        /* Minimum CKE pulse width (tCKE) */
        unsigned char cke_pls;
        /* Window for four activates (tFAW) */
        unsigned short four_act;
#ifdef CONFIG_SYS_FSL_DDR3
        const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
#endif

        /* FIXME add check that this must be less than acttorw_mclk */
        add_lat_mclk = additive_latency;
        cpo = popts->cpo_override;

#if defined(CONFIG_SYS_FSL_DDR1)
        /*
         * This is a lie.  It should really be 1, but if it is
         * set to 1, bits overlap into the old controller's
         * otherwise unused ACSM field.  If we leave it 0, then
         * the HW will magically treat it as 1 for DDR 1.  Oh Yea.
         */
        wr_lat = 0;
#elif defined(CONFIG_SYS_FSL_DDR2)
        wr_lat = cas_latency - 1;
#else
        wr_lat = compute_cas_write_latency(ctrl_num);
#endif

#ifdef CONFIG_SYS_FSL_DDR4
        rd_to_pre = picos_to_mclk(ctrl_num, 7500);
#else
        rd_to_pre = picos_to_mclk(ctrl_num, common_dimm->trtp_ps);
#endif
        /*
         * JEDEC has some min requirements for tRTP
         */
#if defined(CONFIG_SYS_FSL_DDR2)
        if (rd_to_pre  < 2)
                rd_to_pre  = 2;
#elif defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
        if (rd_to_pre < 4)
                rd_to_pre = 4;
#endif
        if (popts->otf_burst_chop_en)
                rd_to_pre += 2; /* according to UM */

        wr_data_delay = popts->write_data_delay;
#ifdef CONFIG_SYS_FSL_DDR4
        cpo = 0;
        cke_pls = max(3U, picos_to_mclk(ctrl_num, 5000));
#elif defined(CONFIG_SYS_FSL_DDR3)
        /*
         * cke pulse = max(3nCK, 7.5ns) for DDR3-800
         *             max(3nCK, 5.625ns) for DDR3-1066, 1333
         *             max(3nCK, 5ns) for DDR3-1600, 1866, 2133
         */
        cke_pls = max(3U, picos_to_mclk(ctrl_num, mclk_ps > 1870 ? 7500 :
                                        (mclk_ps > 1245 ? 5625 : 5000)));
#else
        cke_pls = FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR;
#endif
        four_act = picos_to_mclk(ctrl_num,
                                 popts->tfaw_window_four_activates_ps);

        ddr->timing_cfg_2 = (0
                | ((add_lat_mclk & 0xf) << 28)
                | ((cpo & 0x1f) << 23)
                | ((wr_lat & 0xf) << 19)
                | (((wr_lat & 0x10) >> 4) << 18)
                | ((rd_to_pre & RD_TO_PRE_MASK) << RD_TO_PRE_SHIFT)
                | ((wr_data_delay & WR_DATA_DELAY_MASK) << WR_DATA_DELAY_SHIFT)
                | ((cke_pls & 0x7) << 6)
                | ((four_act & 0x3f) << 0)
                );
        debug("FSLDDR: timing_cfg_2 = 0x%08x\n", ddr->timing_cfg_2);
}

/* DDR SDRAM Register Control Word */
static void set_ddr_sdram_rcw(const unsigned int ctrl_num,
                              fsl_ddr_cfg_regs_t *ddr,
                              const memctl_options_t *popts,
                              const common_timing_params_t *common_dimm)
{
        unsigned int ddr_freq = get_ddr_freq(ctrl_num) / 1000000;
        unsigned int rc0a, rc0f;

        if (common_dimm->all_dimms_registered &&
            !common_dimm->all_dimms_unbuffered) {
                if (popts->rcw_override) {
                        ddr->ddr_sdram_rcw_1 = popts->rcw_1;
                        ddr->ddr_sdram_rcw_2 = popts->rcw_2;
                        ddr->ddr_sdram_rcw_3 = popts->rcw_3;
                } else {
                        rc0a = ddr_freq > 3200 ? 0x7 :
                               (ddr_freq > 2933 ? 0x6 :
                                (ddr_freq > 2666 ? 0x5 :
                                 (ddr_freq > 2400 ? 0x4 :
                                  (ddr_freq > 2133 ? 0x3 :
                                   (ddr_freq > 1866 ? 0x2 :
                                    (ddr_freq > 1600 ? 1 : 0))))));
                        rc0f = ddr_freq > 3200 ? 0x3 :
                               (ddr_freq > 2400 ? 0x2 :
                                (ddr_freq > 2133 ? 0x1 : 0));
                        ddr->ddr_sdram_rcw_1 =
                                common_dimm->rcw[0] << 28 | \
                                common_dimm->rcw[1] << 24 | \
                                common_dimm->rcw[2] << 20 | \
                                common_dimm->rcw[3] << 16 | \
                                common_dimm->rcw[4] << 12 | \
                                common_dimm->rcw[5] << 8 | \
                                common_dimm->rcw[6] << 4 | \
                                common_dimm->rcw[7];
                        ddr->ddr_sdram_rcw_2 =
                                common_dimm->rcw[8] << 28 | \
                                common_dimm->rcw[9] << 24 | \
                                rc0a << 20 | \
                                common_dimm->rcw[11] << 16 | \
                                common_dimm->rcw[12] << 12 | \
                                common_dimm->rcw[13] << 8 | \
                                common_dimm->rcw[14] << 4 | \
                                rc0f;
                        ddr->ddr_sdram_rcw_3 =
                                ((ddr_freq - 1260 + 19) / 20) << 8;
                }
                debug("FSLDDR: ddr_sdram_rcw_1 = 0x%08x\n",
                      ddr->ddr_sdram_rcw_1);
                debug("FSLDDR: ddr_sdram_rcw_2 = 0x%08x\n",
                      ddr->ddr_sdram_rcw_2);
                debug("FSLDDR: ddr_sdram_rcw_3 = 0x%08x\n",
                      ddr->ddr_sdram_rcw_3);
        }
}

/* DDR SDRAM control configuration (DDR_SDRAM_CFG) */
static void set_ddr_sdram_cfg(fsl_ddr_cfg_regs_t *ddr,
                               const memctl_options_t *popts,
                               const common_timing_params_t *common_dimm)
{
        unsigned int mem_en;            /* DDR SDRAM interface logic enable */
        unsigned int sren;              /* Self refresh enable (during sleep) */
        unsigned int ecc_en;            /* ECC enable. */
        unsigned int rd_en;             /* Registered DIMM enable */
        unsigned int sdram_type;        /* Type of SDRAM */
        unsigned int dyn_pwr;           /* Dynamic power management mode */
        unsigned int dbw;               /* DRAM dta bus width */
        unsigned int eight_be = 0;      /* 8-beat burst enable, DDR2 is zero */
        unsigned int ncap = 0;          /* Non-concurrent auto-precharge */
        unsigned int threet_en;         /* Enable 3T timing */
        unsigned int twot_en;           /* Enable 2T timing */
        unsigned int ba_intlv_ctl;      /* Bank (CS) interleaving control */
        unsigned int x32_en = 0;        /* x32 enable */
        unsigned int pchb8 = 0;         /* precharge bit 8 enable */
        unsigned int hse;               /* Global half strength override */
        unsigned int acc_ecc_en = 0;    /* Accumulated ECC enable */
        unsigned int mem_halt = 0;      /* memory controller halt */
        unsigned int bi = 0;            /* Bypass initialization */

        mem_en = 1;
        sren = popts->self_refresh_in_sleep;
        if (common_dimm->all_dimms_ecc_capable) {
                /* Allow setting of ECC only if all DIMMs are ECC. */
                ecc_en = popts->ecc_mode;
        } else {
                ecc_en = 0;
        }

        if (common_dimm->all_dimms_registered &&
            !common_dimm->all_dimms_unbuffered) {
                rd_en = 1;
                twot_en = 0;
        } else {
                rd_en = 0;
                twot_en = popts->twot_en;
        }

        sdram_type = CONFIG_FSL_SDRAM_TYPE;

        dyn_pwr = popts->dynamic_power;
        dbw = popts->data_bus_width;
        /* 8-beat burst enable DDR-III case
         * we must clear it when use the on-the-fly mode,
         * must set it when use the 32-bits bus mode.
         */
        if ((sdram_type == SDRAM_TYPE_DDR3) ||
            (sdram_type == SDRAM_TYPE_DDR4)) {
                if (popts->burst_length == DDR_BL8)
                        eight_be = 1;
                if (popts->burst_length == DDR_OTF)
                        eight_be = 0;
                if (dbw == 0x1)
                        eight_be = 1;
        }

        threet_en = popts->threet_en;
        ba_intlv_ctl = popts->ba_intlv_ctl;
        hse = popts->half_strength_driver_enable;

        /* set when ddr bus width < 64 */
        acc_ecc_en = (dbw != 0 && ecc_en == 1) ? 1 : 0;

        ddr->ddr_sdram_cfg = (0
                        | ((mem_en & 0x1) << 31)
                        | ((sren & 0x1) << 30)
                        | ((ecc_en & 0x1) << 29)
                        | ((rd_en & 0x1) << 28)
                        | ((sdram_type & 0x7) << 24)
                        | ((dyn_pwr & 0x1) << 21)
                        | ((dbw & 0x3) << 19)
                        | ((eight_be & 0x1) << 18)
                        | ((ncap & 0x1) << 17)
                        | ((threet_en & 0x1) << 16)
                        | ((twot_en & 0x1) << 15)
                        | ((ba_intlv_ctl & 0x7F) << 8)
                        | ((x32_en & 0x1) << 5)
                        | ((pchb8 & 0x1) << 4)
                        | ((hse & 0x1) << 3)
                        | ((acc_ecc_en & 0x1) << 2)
                        | ((mem_halt & 0x1) << 1)
                        | ((bi & 0x1) << 0)
                        );
        debug("FSLDDR: ddr_sdram_cfg = 0x%08x\n", ddr->ddr_sdram_cfg);
}

/* DDR SDRAM control configuration 2 (DDR_SDRAM_CFG_2) */
static void set_ddr_sdram_cfg_2(const unsigned int ctrl_num,
                               fsl_ddr_cfg_regs_t *ddr,
                               const memctl_options_t *popts,
                               const unsigned int unq_mrs_en)
{
        unsigned int frc_sr = 0;        /* Force self refresh */
        unsigned int sr_ie = 0;         /* Self-refresh interrupt enable */
        unsigned int odt_cfg = 0;       /* ODT configuration */
        unsigned int num_pr;            /* Number of posted refreshes */
        unsigned int slow = 0;          /* DDR will be run less than 1250 */
        unsigned int x4_en = 0;         /* x4 DRAM enable */
        unsigned int obc_cfg;           /* On-The-Fly Burst Chop Cfg */
        unsigned int ap_en;             /* Address Parity Enable */
        unsigned int d_init;            /* DRAM data initialization */
        unsigned int rcw_en = 0;        /* Register Control Word Enable */
        unsigned int md_en = 0;         /* Mirrored DIMM Enable */
        unsigned int qd_en = 0;         /* quad-rank DIMM Enable */
        int i;
#ifndef CONFIG_SYS_FSL_DDR4
        unsigned int dll_rst_dis = 1;   /* DLL reset disable */
        unsigned int dqs_cfg;           /* DQS configuration */

        dqs_cfg = popts->dqs_config;
#endif
        for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
                if (popts->cs_local_opts[i].odt_rd_cfg
                        || popts->cs_local_opts[i].odt_wr_cfg) {
                        odt_cfg = SDRAM_CFG2_ODT_ONLY_READ;
                        break;
                }
        }
        sr_ie = popts->self_refresh_interrupt_en;
        num_pr = popts->package_3ds + 1;

        /*
         * 8572 manual says
         *     {TIMING_CFG_1[PRETOACT]
         *      + [DDR_SDRAM_CFG_2[NUM_PR]
         *        * ({EXT_REFREC || REFREC} + 8 + 2)]}
         *      << DDR_SDRAM_INTERVAL[REFINT]
         */
#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
        obc_cfg = popts->otf_burst_chop_en;
#else
        obc_cfg = 0;
#endif

#if (CONFIG_SYS_FSL_DDR_VER >= FSL_DDR_VER_4_7)
        slow = get_ddr_freq(ctrl_num) < 1249000000;
#endif

        if (popts->registered_dimm_en)
                rcw_en = 1;

        /* DDR4 can have address parity for UDIMM and discrete */
        if ((CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4) &&
            (!popts->registered_dimm_en)) {
                ap_en = 0;
        } else {
                ap_en = popts->ap_en;
        }

        x4_en = popts->x4_en ? 1 : 0;

#if defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
        /* Use the DDR controller to auto initialize memory. */
        d_init = popts->ecc_init_using_memctl;
        ddr->ddr_data_init = CONFIG_MEM_INIT_VALUE;
        debug("DDR: ddr_data_init = 0x%08x\n", ddr->ddr_data_init);
#else
        /* Memory will be initialized via DMA, or not at all. */
        d_init = 0;
#endif

#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
        md_en = popts->mirrored_dimm;
#endif
        qd_en = popts->quad_rank_present ? 1 : 0;
        ddr->ddr_sdram_cfg_2 = (0
                | ((frc_sr & 0x1) << 31)
                | ((sr_ie & 0x1) << 30)
#ifndef CONFIG_SYS_FSL_DDR4
                | ((dll_rst_dis & 0x1) << 29)
                | ((dqs_cfg & 0x3) << 26)
#endif
                | ((odt_cfg & 0x3) << 21)
                | ((num_pr & 0xf) << 12)
                | ((slow & 1) << 11)
                | (x4_en << 10)
                | (qd_en << 9)
                | (unq_mrs_en << 8)
                | ((obc_cfg & 0x1) << 6)
                | ((ap_en & 0x1) << 5)
                | ((d_init & 0x1) << 4)
                | ((rcw_en & 0x1) << 2)
                | ((md_en & 0x1) << 0)
                );
        debug("FSLDDR: ddr_sdram_cfg_2 = 0x%08x\n", ddr->ddr_sdram_cfg_2);
}

#ifdef CONFIG_SYS_FSL_DDR4
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
static void set_ddr_sdram_mode_2(const unsigned int ctrl_num,
                                fsl_ddr_cfg_regs_t *ddr,
                                const memctl_options_t *popts,
                                const common_timing_params_t *common_dimm,
                                const unsigned int unq_mrs_en)
{
        unsigned short esdmode2 = 0;    /* Extended SDRAM mode 2 */
        unsigned short esdmode3 = 0;    /* Extended SDRAM mode 3 */
        int i;
        unsigned int wr_crc = 0;        /* Disable */
        unsigned int rtt_wr = 0;        /* Rtt_WR - dynamic ODT off */
        unsigned int srt = 0;   /* self-refresh temerature, normal range */
        unsigned int cwl = compute_cas_write_latency(ctrl_num) - 9;
        unsigned int mpr = 0;   /* serial */
        unsigned int wc_lat;
        const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);

        if (popts->rtt_override)
                rtt_wr = popts->rtt_wr_override_value;
        else
                rtt_wr = popts->cs_local_opts[0].odt_rtt_wr;

        if (common_dimm->extended_op_srt)
                srt = common_dimm->extended_op_srt;

        esdmode2 = (0
                | ((wr_crc & 0x1) << 12)
                | ((rtt_wr & 0x3) << 9)
                | ((srt & 0x3) << 6)
                | ((cwl & 0x7) << 3));

        if (mclk_ps >= 1250)
                wc_lat = 0;
        else if (mclk_ps >= 833)
                wc_lat = 1;
        else
                wc_lat = 2;

        esdmode3 = (0
                | ((mpr & 0x3) << 11)
                | ((wc_lat & 0x3) << 9));

        ddr->ddr_sdram_mode_2 = (0
                                 | ((esdmode2 & 0xFFFF) << 16)
                                 | ((esdmode3 & 0xFFFF) << 0)
                                 );
        debug("FSLDDR: ddr_sdram_mode_2 = 0x%08x\n", ddr->ddr_sdram_mode_2);

        if (unq_mrs_en) {       /* unique mode registers are supported */
                for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
                        if (popts->rtt_override)
                                rtt_wr = popts->rtt_wr_override_value;
                        else
                                rtt_wr = popts->cs_local_opts[i].odt_rtt_wr;

                        esdmode2 &= 0xF9FF;     /* clear bit 10, 9 */
                        esdmode2 |= (rtt_wr & 0x3) << 9;
                        switch (i) {
                        case 1:
                                ddr->ddr_sdram_mode_4 = (0
                                        | ((esdmode2 & 0xFFFF) << 16)
                                        | ((esdmode3 & 0xFFFF) << 0)
                                        );
                                break;
                        case 2:
                                ddr->ddr_sdram_mode_6 = (0
                                        | ((esdmode2 & 0xFFFF) << 16)
                                        | ((esdmode3 & 0xFFFF) << 0)
                                        );
                                break;
                        case 3:
                                ddr->ddr_sdram_mode_8 = (0
                                        | ((esdmode2 & 0xFFFF) << 16)
                                        | ((esdmode3 & 0xFFFF) << 0)
                                        );
                                break;
                        }
                }
                debug("FSLDDR: ddr_sdram_mode_4 = 0x%08x\n",
                      ddr->ddr_sdram_mode_4);
                debug("FSLDDR: ddr_sdram_mode_6 = 0x%08x\n",
                      ddr->ddr_sdram_mode_6);
                debug("FSLDDR: ddr_sdram_mode_8 = 0x%08x\n",
                      ddr->ddr_sdram_mode_8);
        }
}
#elif defined(CONFIG_SYS_FSL_DDR3)
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
static void set_ddr_sdram_mode_2(const unsigned int ctrl_num,
                                fsl_ddr_cfg_regs_t *ddr,
                                const memctl_options_t *popts,
                                const common_timing_params_t *common_dimm,
                                const unsigned int unq_mrs_en)
{
        unsigned short esdmode2 = 0;    /* Extended SDRAM mode 2 */
        unsigned short esdmode3 = 0;    /* Extended SDRAM mode 3 */
        int i;
        unsigned int rtt_wr = 0;        /* Rtt_WR - dynamic ODT off */
        unsigned int srt = 0;   /* self-refresh temerature, normal range */
        unsigned int asr = 0;   /* auto self-refresh disable */
        unsigned int cwl = compute_cas_write_latency(ctrl_num) - 5;
        unsigned int pasr = 0;  /* partial array self refresh disable */

        if (popts->rtt_override)
                rtt_wr = popts->rtt_wr_override_value;
        else
                rtt_wr = popts->cs_local_opts[0].odt_rtt_wr;

        if (common_dimm->extended_op_srt)
                srt = common_dimm->extended_op_srt;

        esdmode2 = (0
                | ((rtt_wr & 0x3) << 9)
                | ((srt & 0x1) << 7)
                | ((asr & 0x1) << 6)
                | ((cwl & 0x7) << 3)
                | ((pasr & 0x7) << 0));
        ddr->ddr_sdram_mode_2 = (0
                                 | ((esdmode2 & 0xFFFF) << 16)
                                 | ((esdmode3 & 0xFFFF) << 0)
                                 );
        debug("FSLDDR: ddr_sdram_mode_2 = 0x%08x\n", ddr->ddr_sdram_mode_2);

        if (unq_mrs_en) {       /* unique mode registers are supported */
                for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
                        if (popts->rtt_override)
                                rtt_wr = popts->rtt_wr_override_value;
                        else
                                rtt_wr = popts->cs_local_opts[i].odt_rtt_wr;

                        esdmode2 &= 0xF9FF;     /* clear bit 10, 9 */
                        esdmode2 |= (rtt_wr & 0x3) << 9;
                        switch (i) {
                        case 1:
                                ddr->ddr_sdram_mode_4 = (0
                                        | ((esdmode2 & 0xFFFF) << 16)
                                        | ((esdmode3 & 0xFFFF) << 0)
                                        );
                                break;
                        case 2:
                                ddr->ddr_sdram_mode_6 = (0
                                        | ((esdmode2 & 0xFFFF) << 16)
                                        | ((esdmode3 & 0xFFFF) << 0)
                                        );
                                break;
                        case 3:
                                ddr->ddr_sdram_mode_8 = (0
                                        | ((esdmode2 & 0xFFFF) << 16)
                                        | ((esdmode3 & 0xFFFF) << 0)
                                        );
                                break;
                        }
                }
                debug("FSLDDR: ddr_sdram_mode_4 = 0x%08x\n",
                        ddr->ddr_sdram_mode_4);
                debug("FSLDDR: ddr_sdram_mode_6 = 0x%08x\n",
                        ddr->ddr_sdram_mode_6);
                debug("FSLDDR: ddr_sdram_mode_8 = 0x%08x\n",
                        ddr->ddr_sdram_mode_8);
        }
}

#else /* for DDR2 and DDR1 */
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
static void set_ddr_sdram_mode_2(const unsigned int ctrl_num,
                                fsl_ddr_cfg_regs_t *ddr,
                                const memctl_options_t *popts,
                                const common_timing_params_t *common_dimm,
                                const unsigned int unq_mrs_en)
{
        unsigned short esdmode2 = 0;    /* Extended SDRAM mode 2 */
        unsigned short esdmode3 = 0;    /* Extended SDRAM mode 3 */

        ddr->ddr_sdram_mode_2 = (0
                                 | ((esdmode2 & 0xFFFF) << 16)
                                 | ((esdmode3 & 0xFFFF) << 0)
                                 );
        debug("FSLDDR: ddr_sdram_mode_2 = 0x%08x\n", ddr->ddr_sdram_mode_2);
}
#endif

#ifdef CONFIG_SYS_FSL_DDR4
/* DDR SDRAM Mode configuration 9 (DDR_SDRAM_MODE_9) */
static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr,
                                const memctl_options_t *popts,
                                const common_timing_params_t *common_dimm,
                                const unsigned int unq_mrs_en)
{
        int i;
        unsigned short esdmode4 = 0;    /* Extended SDRAM mode 4 */
        unsigned short esdmode5;        /* Extended SDRAM mode 5 */
        int rtt_park = 0;
        bool four_cs = false;
        const unsigned int mclk_ps = get_memory_clk_period_ps(0);

#if CONFIG_CHIP_SELECTS_PER_CTRL == 4
        if ((ddr->cs[0].config & SDRAM_CS_CONFIG_EN) &&
            (ddr->cs[1].config & SDRAM_CS_CONFIG_EN) &&
            (ddr->cs[2].config & SDRAM_CS_CONFIG_EN) &&
            (ddr->cs[3].config & SDRAM_CS_CONFIG_EN))
                four_cs = true;
#endif
        if (ddr->cs[0].config & SDRAM_CS_CONFIG_EN) {
                esdmode5 = 0x00000500;  /* Data mask enable, RTT_PARK CS0 */
                rtt_park = four_cs ? 0 : 1;
        } else {
                esdmode5 = 0x00000400;  /* Data mask enabled */
        }

        /*
         * For DDR3, set C/A latency if address parity is enabled.
         * For DDR4, set C/A latency for UDIMM only. For RDIMM the delay is
         * handled by register chip and RCW settings.
         */
        if ((ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) &&
            ((CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4) ||
             !popts->registered_dimm_en)) {
                if (mclk_ps >= 935) {
                        /* for DDR4-1600/1866/2133 */
                        esdmode5 |= DDR_MR5_CA_PARITY_LAT_4_CLK;
                } else if (mclk_ps >= 833) {
                        /* for DDR4-2400 */
                        esdmode5 |= DDR_MR5_CA_PARITY_LAT_5_CLK;
                } else {
                        printf("parity: mclk_ps = %d not supported\n", mclk_ps);
                }
        }

        ddr->ddr_sdram_mode_9 = (0
                                 | ((esdmode4 & 0xffff) << 16)
                                 | ((esdmode5 & 0xffff) << 0)
                                );

        /* Normally only the first enabled CS use 0x500, others use 0x400
         * But when four chip-selects are all enabled, all mode registers
         * need 0x500 to park.
         */

        debug("FSLDDR: ddr_sdram_mode_9 = 0x%08x\n", ddr->ddr_sdram_mode_9);
        if (unq_mrs_en) {       /* unique mode registers are supported */
                for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
                        if (!rtt_park &&
                            (ddr->cs[i].config & SDRAM_CS_CONFIG_EN)) {
                                esdmode5 |= 0x00000500; /* RTT_PARK */
                                rtt_park = four_cs ? 0 : 1;
                        } else {
                                esdmode5 = 0x00000400;
                        }

                        if ((ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) &&
                            ((CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4) ||
                             !popts->registered_dimm_en)) {
                                if (mclk_ps >= 935) {
                                        /* for DDR4-1600/1866/2133 */
                                        esdmode5 |= DDR_MR5_CA_PARITY_LAT_4_CLK;
                                } else if (mclk_ps >= 833) {
                                        /* for DDR4-2400 */
                                        esdmode5 |= DDR_MR5_CA_PARITY_LAT_5_CLK;
                                } else {
                                        printf("parity: mclk_ps = %d not supported\n",
                                               mclk_ps);
                                }
                        }

                        switch (i) {
                        case 1:
                                ddr->ddr_sdram_mode_11 = (0
                                        | ((esdmode4 & 0xFFFF) << 16)
                                        | ((esdmode5 & 0xFFFF) << 0)
                                        );
                                break;
                        case 2:
                                ddr->ddr_sdram_mode_13 = (0
                                        | ((esdmode4 & 0xFFFF) << 16)
                                        | ((esdmode5 & 0xFFFF) << 0)
                                        );
                                break;
                        case 3:
                                ddr->ddr_sdram_mode_15 = (0
                                        | ((esdmode4 & 0xFFFF) << 16)
                                        | ((esdmode5 & 0xFFFF) << 0)
                                        );
                                break;
                        }
                }
                debug("FSLDDR: ddr_sdram_mode_11 = 0x%08x\n",
                      ddr->ddr_sdram_mode_11);
                debug("FSLDDR: ddr_sdram_mode_13 = 0x%08x\n",
                      ddr->ddr_sdram_mode_13);
                debug("FSLDDR: ddr_sdram_mode_15 = 0x%08x\n",
                      ddr->ddr_sdram_mode_15);
        }
}

/* DDR SDRAM Mode configuration 10 (DDR_SDRAM_MODE_10) */
static void set_ddr_sdram_mode_10(const unsigned int ctrl_num,
                                fsl_ddr_cfg_regs_t *ddr,
                                const memctl_options_t *popts,
                                const common_timing_params_t *common_dimm,
                                const unsigned int unq_mrs_en)
{
        int i;
        unsigned short esdmode6 = 0;    /* Extended SDRAM mode 6 */
        unsigned short esdmode7 = 0;    /* Extended SDRAM mode 7 */
        unsigned int tccdl_min = picos_to_mclk(ctrl_num, common_dimm->tccdl_ps);

        esdmode6 = ((tccdl_min - 4) & 0x7) << 10;

        if (popts->ddr_cdr2 & DDR_CDR2_VREF_RANGE_2)
                esdmode6 |= 1 << 6;     /* Range 2 */

        ddr->ddr_sdram_mode_10 = (0
                                 | ((esdmode6 & 0xffff) << 16)
                                 | ((esdmode7 & 0xffff) << 0)
                                );
        debug("FSLDDR: ddr_sdram_mode_10 = 0x%08x\n", ddr->ddr_sdram_mode_10);
        if (unq_mrs_en) {       /* unique mode registers are supported */
                for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
                        switch (i) {
                        case 1:
                                ddr->ddr_sdram_mode_12 = (0
                                        | ((esdmode6 & 0xFFFF) << 16)
                                        | ((esdmode7 & 0xFFFF) << 0)
                                        );
                                break;
                        case 2:
                                ddr->ddr_sdram_mode_14 = (0
                                        | ((esdmode6 & 0xFFFF) << 16)
                                        | ((esdmode7 & 0xFFFF) << 0)
                                        );
                                break;
                        case 3:
                                ddr->ddr_sdram_mode_16 = (0
                                        | ((esdmode6 & 0xFFFF) << 16)
                                        | ((esdmode7 & 0xFFFF) << 0)
                                        );
                                break;
                        }
                }
                debug("FSLDDR: ddr_sdram_mode_12 = 0x%08x\n",
                      ddr->ddr_sdram_mode_12);
                debug("FSLDDR: ddr_sdram_mode_14 = 0x%08x\n",
                      ddr->ddr_sdram_mode_14);
                debug("FSLDDR: ddr_sdram_mode_16 = 0x%08x\n",
                      ddr->ddr_sdram_mode_16);
        }
}

#endif

/* DDR SDRAM Interval Configuration (DDR_SDRAM_INTERVAL) */
static void set_ddr_sdram_interval(const unsigned int ctrl_num,
                                fsl_ddr_cfg_regs_t *ddr,
                                const memctl_options_t *popts,
                                const common_timing_params_t *common_dimm)
{
        unsigned int refint;    /* Refresh interval */
        unsigned int bstopre;   /* Precharge interval */

        refint = picos_to_mclk(ctrl_num, common_dimm->refresh_rate_ps);

        bstopre = popts->bstopre;

        /* refint field used 0x3FFF in earlier controllers */
        ddr->ddr_sdram_interval = (0
                                   | ((refint & 0xFFFF) << 16)
                                   | ((bstopre & 0x3FFF) << 0)
                                   );
        debug("FSLDDR: ddr_sdram_interval = 0x%08x\n", ddr->ddr_sdram_interval);
}

#ifdef CONFIG_SYS_FSL_DDR4
/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
                               fsl_ddr_cfg_regs_t *ddr,
                               const memctl_options_t *popts,
                               const common_timing_params_t *common_dimm,
                               unsigned int cas_latency,
                               unsigned int additive_latency,
                               const unsigned int unq_mrs_en)
{
        int i;
        unsigned short esdmode;         /* Extended SDRAM mode */
        unsigned short sdmode;          /* SDRAM mode */

        /* Mode Register - MR1 */
        unsigned int qoff = 0;          /* Output buffer enable 0=yes, 1=no */
        unsigned int tdqs_en = 0;       /* TDQS Enable: 0=no, 1=yes */
        unsigned int rtt;
        unsigned int wrlvl_en = 0;      /* Write level enable: 0=no, 1=yes */
        unsigned int al = 0;            /* Posted CAS# additive latency (AL) */
        unsigned int dic = 0;           /* Output driver impedance, 40ohm */
        unsigned int dll_en = 1;        /* DLL Enable  1=Enable (Normal),
                                                       0=Disable (Test/Debug) */

        /* Mode Register - MR0 */
        unsigned int wr = 0;    /* Write Recovery */
        unsigned int dll_rst;   /* DLL Reset */
        unsigned int mode;      /* Normal=0 or Test=1 */
        unsigned int caslat = 4;/* CAS# latency, default set as 6 cycles */
        /* BT: Burst Type (0=Nibble Sequential, 1=Interleaved) */
        unsigned int bt;
        unsigned int bl;        /* BL: Burst Length */

        unsigned int wr_mclk;
        /* DDR4 support WR 10, 12, 14, 16, 18, 20, 24 */
        static const u8 wr_table[] = {
                0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6};
        /* DDR4 support CAS 9, 10, 11, 12, 13, 14, 15, 16, 18, 20, 22, 24 */
        static const u8 cas_latency_table[] = {
                0, 1, 2, 3, 4, 5, 6, 7, 8, 8,
                9, 9, 10, 10, 11, 11};

        if (popts->rtt_override)
                rtt = popts->rtt_override_value;
        else
                rtt = popts->cs_local_opts[0].odt_rtt_norm;

        if (additive_latency == (cas_latency - 1))
                al = 1;
        if (additive_latency == (cas_latency - 2))
                al = 2;

        if (popts->quad_rank_present)
                dic = 1;        /* output driver impedance 240/7 ohm */

        /*
         * The esdmode value will also be used for writing
         * MR1 during write leveling for DDR3, although the
         * bits specifically related to the write leveling
         * scheme will be handled automatically by the DDR
         * controller. so we set the wrlvl_en = 0 here.
         */
        esdmode = (0
                | ((qoff & 0x1) << 12)
                | ((tdqs_en & 0x1) << 11)
                | ((rtt & 0x7) << 8)
                | ((wrlvl_en & 0x1) << 7)
                | ((al & 0x3) << 3)
                | ((dic & 0x3) << 1)   /* DIC field is split */
                | ((dll_en & 0x1) << 0)
                );

        /*
         * DLL control for precharge PD
         * 0=slow exit DLL off (tXPDLL)
         * 1=fast exit DLL on (tXP)
         */

        wr_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
        if (wr_mclk <= 24) {
                wr = wr_table[wr_mclk - 10];
        } else {
                printf("Error: unsupported write recovery for mode register wr_mclk = %d\n",
                       wr_mclk);
        }

        dll_rst = 0;    /* dll no reset */
        mode = 0;       /* normal mode */

        /* look up table to get the cas latency bits */
        if (cas_latency >= 9 && cas_latency <= 24)
                caslat = cas_latency_table[cas_latency - 9];
        else
                printf("Error: unsupported cas latency for mode register\n");

        bt = 0; /* Nibble sequential */

        switch (popts->burst_length) {
        case DDR_BL8:
                bl = 0;
                break;
        case DDR_OTF:
                bl = 1;
                break;
        case DDR_BC4:
                bl = 2;
                break;
        default:
                printf("Error: invalid burst length of %u specified. ",
                       popts->burst_length);
                puts("Defaulting to on-the-fly BC4 or BL8 beats.\n");
                bl = 1;
                break;
        }

        sdmode = (0
                  | ((wr & 0x7) << 9)
                  | ((dll_rst & 0x1) << 8)
                  | ((mode & 0x1) << 7)
                  | (((caslat >> 1) & 0x7) << 4)
                  | ((bt & 0x1) << 3)
                  | ((caslat & 1) << 2)
                  | ((bl & 0x3) << 0)
                  );

        ddr->ddr_sdram_mode = (0
                               | ((esdmode & 0xFFFF) << 16)
                               | ((sdmode & 0xFFFF) << 0)
                               );

        debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);

        if (unq_mrs_en) {       /* unique mode registers are supported */
                for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
                        if (popts->rtt_override)
                                rtt = popts->rtt_override_value;
                        else
                                rtt = popts->cs_local_opts[i].odt_rtt_norm;

                        esdmode &= 0xF8FF;      /* clear bit 10,9,8 for rtt */
                        esdmode |= (rtt & 0x7) << 8;
                        switch (i) {
                        case 1:
                                ddr->ddr_sdram_mode_3 = (0
                                       | ((esdmode & 0xFFFF) << 16)
                                       | ((sdmode & 0xFFFF) << 0)
                                       );
                                break;
                        case 2:
                                ddr->ddr_sdram_mode_5 = (0
                                       | ((esdmode & 0xFFFF) << 16)
                                       | ((sdmode & 0xFFFF) << 0)
                                       );
                                break;
                        case 3:
                                ddr->ddr_sdram_mode_7 = (0
                                       | ((esdmode & 0xFFFF) << 16)
                                       | ((sdmode & 0xFFFF) << 0)
                                       );
                                break;
                        }
                }
                debug("FSLDDR: ddr_sdram_mode_3 = 0x%08x\n",
                      ddr->ddr_sdram_mode_3);
                debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
                      ddr->ddr_sdram_mode_5);
                debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
                      ddr->ddr_sdram_mode_5);
        }
}

#elif defined(CONFIG_SYS_FSL_DDR3)
/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
                               fsl_ddr_cfg_regs_t *ddr,
                               const memctl_options_t *popts,
                               const common_timing_params_t *common_dimm,
                               unsigned int cas_latency,
                               unsigned int additive_latency,
                               const unsigned int unq_mrs_en)
{
        int i;
        unsigned short esdmode;         /* Extended SDRAM mode */
        unsigned short sdmode;          /* SDRAM mode */

        /* Mode Register - MR1 */
        unsigned int qoff = 0;          /* Output buffer enable 0=yes, 1=no */
        unsigned int tdqs_en = 0;       /* TDQS Enable: 0=no, 1=yes */
        unsigned int rtt;
        unsigned int wrlvl_en = 0;      /* Write level enable: 0=no, 1=yes */
        unsigned int al = 0;            /* Posted CAS# additive latency (AL) */
        unsigned int dic = 0;           /* Output driver impedance, 40ohm */
        unsigned int dll_en = 0;        /* DLL Enable  0=Enable (Normal),
                                                       1=Disable (Test/Debug) */

        /* Mode Register - MR0 */
        unsigned int dll_on;    /* DLL control for precharge PD, 0=off, 1=on */
        unsigned int wr = 0;    /* Write Recovery */
        unsigned int dll_rst;   /* DLL Reset */
        unsigned int mode;      /* Normal=0 or Test=1 */
        unsigned int caslat = 4;/* CAS# latency, default set as 6 cycles */
        /* BT: Burst Type (0=Nibble Sequential, 1=Interleaved) */
        unsigned int bt;
        unsigned int bl;        /* BL: Burst Length */

        unsigned int wr_mclk;
        /*
         * DDR_SDRAM_MODE doesn't support 9,11,13,15
         * Please refer JEDEC Standard No. 79-3E for Mode Register MR0
         * for this table
         */
        static const u8 wr_table[] = {1, 2, 3, 4, 5, 5, 6, 6, 7, 7, 0, 0};

        if (popts->rtt_override)
                rtt = popts->rtt_override_value;
        else
                rtt = popts->cs_local_opts[0].odt_rtt_norm;

        if (additive_latency == (cas_latency - 1))
                al = 1;
        if (additive_latency == (cas_latency - 2))
                al = 2;

        if (popts->quad_rank_present)
                dic = 1;        /* output driver impedance 240/7 ohm */

        /*
         * The esdmode value will also be used for writing
         * MR1 during write leveling for DDR3, although the
         * bits specifically related to the write leveling
         * scheme will be handled automatically by the DDR
         * controller. so we set the wrlvl_en = 0 here.
         */
        esdmode = (0
                | ((qoff & 0x1) << 12)
                | ((tdqs_en & 0x1) << 11)
                | ((rtt & 0x4) << 7)   /* rtt field is split */
                | ((wrlvl_en & 0x1) << 7)
                | ((rtt & 0x2) << 5)   /* rtt field is split */
                | ((dic & 0x2) << 4)   /* DIC field is split */
                | ((al & 0x3) << 3)
                | ((rtt & 0x1) << 2)  /* rtt field is split */
                | ((dic & 0x1) << 1)   /* DIC field is split */
                | ((dll_en & 0x1) << 0)
                );

        /*
         * DLL control for precharge PD
         * 0=slow exit DLL off (tXPDLL)
         * 1=fast exit DLL on (tXP)
         */
        dll_on = 1;

        wr_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
        if (wr_mclk <= 16) {
                wr = wr_table[wr_mclk - 5];
        } else {
                printf("Error: unsupported write recovery for mode register "
                       "wr_mclk = %d\n", wr_mclk);
        }

        dll_rst = 0;    /* dll no reset */
        mode = 0;       /* normal mode */

        /* look up table to get the cas latency bits */
        if (cas_latency >= 5 && cas_latency <= 16) {
                unsigned char cas_latency_table[] = {
                        0x2,    /* 5 clocks */
                        0x4,    /* 6 clocks */
                        0x6,    /* 7 clocks */
                        0x8,    /* 8 clocks */
                        0xa,    /* 9 clocks */
                        0xc,    /* 10 clocks */
                        0xe,    /* 11 clocks */
                        0x1,    /* 12 clocks */
                        0x3,    /* 13 clocks */
                        0x5,    /* 14 clocks */
                        0x7,    /* 15 clocks */
                        0x9,    /* 16 clocks */
                };
                caslat = cas_latency_table[cas_latency - 5];
        } else {
                printf("Error: unsupported cas latency for mode register\n");
        }

        bt = 0; /* Nibble sequential */

        switch (popts->burst_length) {
        case DDR_BL8:
                bl = 0;
                break;
        case DDR_OTF:
                bl = 1;
                break;
        case DDR_BC4:
                bl = 2;
                break;
        default:
                printf("Error: invalid burst length of %u specified. "
                        " Defaulting to on-the-fly BC4 or BL8 beats.\n",
                        popts->burst_length);
                bl = 1;
                break;
        }

        sdmode = (0
                  | ((dll_on & 0x1) << 12)
                  | ((wr & 0x7) << 9)
                  | ((dll_rst & 0x1) << 8)
                  | ((mode & 0x1) << 7)
                  | (((caslat >> 1) & 0x7) << 4)
                  | ((bt & 0x1) << 3)
                  | ((caslat & 1) << 2)
                  | ((bl & 0x3) << 0)
                  );

        ddr->ddr_sdram_mode = (0
                               | ((esdmode & 0xFFFF) << 16)
                               | ((sdmode & 0xFFFF) << 0)
                               );

        debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);

        if (unq_mrs_en) {       /* unique mode registers are supported */
                for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
                        if (popts->rtt_override)
                                rtt = popts->rtt_override_value;
                        else
                                rtt = popts->cs_local_opts[i].odt_rtt_norm;

                        esdmode &= 0xFDBB;      /* clear bit 9,6,2 */
                        esdmode |= (0
                                | ((rtt & 0x4) << 7)   /* rtt field is split */
                                | ((rtt & 0x2) << 5)   /* rtt field is split */
                                | ((rtt & 0x1) << 2)  /* rtt field is split */
                                );
                        switch (i) {
                        case 1:
                                ddr->ddr_sdram_mode_3 = (0
                                       | ((esdmode & 0xFFFF) << 16)
                                       | ((sdmode & 0xFFFF) << 0)
                                       );
                                break;
                        case 2:
                                ddr->ddr_sdram_mode_5 = (0
                                       | ((esdmode & 0xFFFF) << 16)
                                       | ((sdmode & 0xFFFF) << 0)
                                       );
                                break;
                        case 3:
                                ddr->ddr_sdram_mode_7 = (0
                                       | ((esdmode & 0xFFFF) << 16)
                                       | ((sdmode & 0xFFFF) << 0)
                                       );
                                break;
                        }
                }
                debug("FSLDDR: ddr_sdram_mode_3 = 0x%08x\n",
                        ddr->ddr_sdram_mode_3);
                debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
                        ddr->ddr_sdram_mode_5);
                debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
                        ddr->ddr_sdram_mode_5);
        }
}

#else /* !CONFIG_SYS_FSL_DDR3 */

/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
                               fsl_ddr_cfg_regs_t *ddr,
                               const memctl_options_t *popts,
                               const common_timing_params_t *common_dimm,
                               unsigned int cas_latency,
                               unsigned int additive_latency,
                               const unsigned int unq_mrs_en)
{
        unsigned short esdmode;         /* Extended SDRAM mode */
        unsigned short sdmode;          /* SDRAM mode */

        /*
         * FIXME: This ought to be pre-calculated in a
         * technology-specific routine,
         * e.g. compute_DDR2_mode_register(), and then the
         * sdmode and esdmode passed in as part of common_dimm.
         */

        /* Extended Mode Register */
        unsigned int mrs = 0;           /* Mode Register Set */
        unsigned int outputs = 0;       /* 0=Enabled, 1=Disabled */
        unsigned int rdqs_en = 0;       /* RDQS Enable: 0=no, 1=yes */
        unsigned int dqs_en = 0;        /* DQS# Enable: 0=enable, 1=disable */
        unsigned int ocd = 0;           /* 0x0=OCD not supported,
                                           0x7=OCD default state */
        unsigned int rtt;
        unsigned int al;                /* Posted CAS# additive latency (AL) */
        unsigned int ods = 0;           /* Output Drive Strength:
                                                0 = Full strength (18ohm)
                                                1 = Reduced strength (4ohm) */
        unsigned int dll_en = 0;        /* DLL Enable  0=Enable (Normal),
                                                       1=Disable (Test/Debug) */

        /* Mode Register (MR) */
        unsigned int mr;        /* Mode Register Definition */
        unsigned int pd;        /* Power-Down Mode */
        unsigned int wr;        /* Write Recovery */
        unsigned int dll_res;   /* DLL Reset */
        unsigned int mode;      /* Normal=0 or Test=1 */
        unsigned int caslat = 0;/* CAS# latency */
        /* BT: Burst Type (0=Sequential, 1=Interleaved) */
        unsigned int bt;
        unsigned int bl;        /* BL: Burst Length */

        dqs_en = !popts->dqs_config;
        rtt = fsl_ddr_get_rtt();

        al = additive_latency;

        esdmode = (0
                | ((mrs & 0x3) << 14)
                | ((outputs & 0x1) << 12)
                | ((rdqs_en & 0x1) << 11)
                | ((dqs_en & 0x1) << 10)
                | ((ocd & 0x7) << 7)
                | ((rtt & 0x2) << 5)   /* rtt field is split */
                | ((al & 0x7) << 3)
                | ((rtt & 0x1) << 2)   /* rtt field is split */
                | ((ods & 0x1) << 1)
                | ((dll_en & 0x1) << 0)
                );

        mr = 0;          /* FIXME: CHECKME */

        /*
         * 0 = Fast Exit (Normal)
         * 1 = Slow Exit (Low Power)
         */
        pd = 0;

#if defined(CONFIG_SYS_FSL_DDR1)
        wr = 0;       /* Historical */
#elif defined(CONFIG_SYS_FSL_DDR2)
        wr = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
#endif
        dll_res = 0;
        mode = 0;

#if defined(CONFIG_SYS_FSL_DDR1)
        if (1 <= cas_latency && cas_latency <= 4) {
                unsigned char mode_caslat_table[4] = {
                        0x5,    /* 1.5 clocks */
                        0x2,    /* 2.0 clocks */
                        0x6,    /* 2.5 clocks */
                        0x3     /* 3.0 clocks */
                };
                caslat = mode_caslat_table[cas_latency - 1];
        } else {
                printf("Warning: unknown cas_latency %d\n", cas_latency);
        }
#elif defined(CONFIG_SYS_FSL_DDR2)
        caslat = cas_latency;
#endif
        bt = 0;

        switch (popts->burst_length) {
        case DDR_BL4:
                bl = 2;
                break;
        case DDR_BL8:
                bl = 3;
                break;
        default:
                printf("Error: invalid burst length of %u specified. "
                        " Defaulting to 4 beats.\n",
                        popts->burst_length);
                bl = 2;
                break;
        }

        sdmode = (0
                  | ((mr & 0x3) << 14)
                  | ((pd & 0x1) << 12)
                  | ((wr & 0x7) << 9)
                  | ((dll_res & 0x1) << 8)
                  | ((mode & 0x1) << 7)
                  | ((caslat & 0x7) << 4)
                  | ((bt & 0x1) << 3)
                  | ((bl & 0x7) << 0)
                  );

        ddr->ddr_sdram_mode = (0
                               | ((esdmode & 0xFFFF) << 16)
                               | ((sdmode & 0xFFFF) << 0)
                               );
        debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);
}
#endif

/* DDR SDRAM Data Initialization (DDR_DATA_INIT) */
static void set_ddr_data_init(fsl_ddr_cfg_regs_t *ddr)
{
        unsigned int init_value;        /* Initialization value */

#ifdef CONFIG_MEM_INIT_VALUE
        init_value = CONFIG_MEM_INIT_VALUE;
#else
        init_value = 0xDEADBEEF;
#endif
        ddr->ddr_data_init = init_value;
}

/*
 * DDR SDRAM Clock Control (DDR_SDRAM_CLK_CNTL)
 * The old controller on the 8540/60 doesn't have this register.
 * Hope it's OK to set it (to 0) anyway.
 */
static void set_ddr_sdram_clk_cntl(fsl_ddr_cfg_regs_t *ddr,
                                         const memctl_options_t *popts)
{
        unsigned int clk_adjust;        /* Clock adjust */
        unsigned int ss_en = 0;         /* Source synchronous enable */

#if defined(CONFIG_ARCH_MPC8541) || defined(CONFIG_ARCH_MPC8555)
        /* Per FSL Application Note: AN2805 */
        ss_en = 1;
#endif
        if (fsl_ddr_get_version(0) >= 0x40701) {
                /* clk_adjust in 5-bits on T-series and LS-series */
                clk_adjust = (popts->clk_adjust & 0x1F) << 22;
        } else {
                /* clk_adjust in 4-bits on earlier MPC85xx and P-series */
                clk_adjust = (popts->clk_adjust & 0xF) << 23;
        }

        ddr->ddr_sdram_clk_cntl = (0
                                   | ((ss_en & 0x1) << 31)
                                   | clk_adjust
                                   );
        debug("FSLDDR: clk_cntl = 0x%08x\n", ddr->ddr_sdram_clk_cntl);
}

/* DDR Initialization Address (DDR_INIT_ADDR) */
static void set_ddr_init_addr(fsl_ddr_cfg_regs_t *ddr)
{
        unsigned int init_addr = 0;     /* Initialization address */

        ddr->ddr_init_addr = init_addr;
}

/* DDR Initialization Address (DDR_INIT_EXT_ADDR) */
static void set_ddr_init_ext_addr(fsl_ddr_cfg_regs_t *ddr)
{
        unsigned int uia = 0;   /* Use initialization address */
        unsigned int init_ext_addr = 0; /* Initialization address */

        ddr->ddr_init_ext_addr = (0
                                  | ((uia & 0x1) << 31)
                                  | (init_ext_addr & 0xF)
                                  );
}

/* DDR SDRAM Timing Configuration 4 (TIMING_CFG_4) */
static void set_timing_cfg_4(fsl_ddr_cfg_regs_t *ddr,
                                const memctl_options_t *popts)
{
        unsigned int rwt = 0; /* Read-to-write turnaround for same CS */
        unsigned int wrt = 0; /* Write-to-read turnaround for same CS */
        unsigned int rrt = 0; /* Read-to-read turnaround for same CS */
        unsigned int wwt = 0; /* Write-to-write turnaround for same CS */
        unsigned int trwt_mclk = 0;     /* ext_rwt */
        unsigned int dll_lock = 0; /* DDR SDRAM DLL Lock Time */

#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
        if (popts->burst_length == DDR_BL8) {
                /* We set BL/2 for fixed BL8 */
                rrt = 0;        /* BL/2 clocks */
                wwt = 0;        /* BL/2 clocks */
        } else {
                /* We need to set BL/2 + 2 to BC4 and OTF */
                rrt = 2;        /* BL/2 + 2 clocks */
                wwt = 2;        /* BL/2 + 2 clocks */
        }
#endif
#ifdef CONFIG_SYS_FSL_DDR4
        dll_lock = 2;   /* tDLLK = 1024 clocks */
#elif defined(CONFIG_SYS_FSL_DDR3)
        dll_lock = 1;   /* tDLLK = 512 clocks from spec */
#endif

        if (popts->trwt_override)
                trwt_mclk = popts->trwt;

        ddr->timing_cfg_4 = (0
                             | ((rwt & 0xf) << 28)
                             | ((wrt & 0xf) << 24)
                             | ((rrt & 0xf) << 20)
                             | ((wwt & 0xf) << 16)
                             | ((trwt_mclk & 0xc) << 12)
                             | (dll_lock & 0x3)
                             );
        debug("FSLDDR: timing_cfg_4 = 0x%08x\n", ddr->timing_cfg_4);
}

/* DDR SDRAM Timing Configuration 5 (TIMING_CFG_5) */
static void set_timing_cfg_5(fsl_ddr_cfg_regs_t *ddr, unsigned int cas_latency)
{
        unsigned int rodt_on = 0;       /* Read to ODT on */
        unsigned int rodt_off = 0;      /* Read to ODT off */
        unsigned int wodt_on = 0;       /* Write to ODT on */
        unsigned int wodt_off = 0;      /* Write to ODT off */

#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
        unsigned int wr_lat = ((ddr->timing_cfg_2 & 0x00780000) >> 19) +
                              ((ddr->timing_cfg_2 & 0x00040000) >> 14);
        /* rodt_on = timing_cfg_1[caslat] - timing_cfg_2[wrlat] + 1 */
        if (cas_latency >= wr_lat)
                rodt_on = cas_latency - wr_lat + 1;
        rodt_off = 4;   /*  4 clocks */
        wodt_on = 1;    /*  1 clocks */
        wodt_off = 4;   /*  4 clocks */
#endif

        ddr->timing_cfg_5 = (0
                             | ((rodt_on & 0x1f) << 24)
                             | ((rodt_off & 0x7) << 20)
                             | ((wodt_on & 0x1f) << 12)
                             | ((wodt_off & 0x7) << 8)
                             );
        debug("FSLDDR: timing_cfg_5 = 0x%08x\n", ddr->timing_cfg_5);
}

#ifdef CONFIG_SYS_FSL_DDR4
static void set_timing_cfg_6(fsl_ddr_cfg_regs_t *ddr)
{
        unsigned int hs_caslat = 0;
        unsigned int hs_wrlat = 0;
        unsigned int hs_wrrec = 0;
        unsigned int hs_clkadj = 0;
        unsigned int hs_wrlvl_start = 0;

        ddr->timing_cfg_6 = (0
                             | ((hs_caslat & 0x1f) << 24)
                             | ((hs_wrlat & 0x1f) << 19)
                             | ((hs_wrrec & 0x1f) << 12)
                             | ((hs_clkadj & 0x1f) << 6)
                             | ((hs_wrlvl_start & 0x1f) << 0)
                            );
        debug("FSLDDR: timing_cfg_6 = 0x%08x\n", ddr->timing_cfg_6);
}

static void set_timing_cfg_7(const unsigned int ctrl_num,
                             fsl_ddr_cfg_regs_t *ddr,
                             const memctl_options_t *popts,
                             const common_timing_params_t *common_dimm)

{
        unsigned int txpr, tcksre, tcksrx;
        unsigned int cke_rst, cksre, cksrx, par_lat = 0, cs_to_cmd;
        const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);

        txpr = max(5U, picos_to_mclk(ctrl_num, common_dimm->trfc1_ps + 10000));
        tcksre = max(5U, picos_to_mclk(ctrl_num, 10000));
        tcksrx = max(5U, picos_to_mclk(ctrl_num, 10000));

        if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN &&
            CONFIG_FSL_SDRAM_TYPE == SDRAM_TYPE_DDR4) {
                /* for DDR4 only */
                par_lat = (ddr->ddr_sdram_rcw_2 & 0xf) + 1;
                debug("PAR_LAT = %u for mclk_ps = %d\n", par_lat, mclk_ps);
        }

        cs_to_cmd = 0;

        if (txpr <= 200)
                cke_rst = 0;
        else if (txpr <= 256)
                cke_rst = 1;
        else if (txpr <= 512)
                cke_rst = 2;
        else
                cke_rst = 3;

        if (tcksre <= 19)
                cksre = tcksre - 5;
        else
                cksre = 15;

        if (tcksrx <= 19)
                cksrx = tcksrx - 5;
        else
                cksrx = 15;

        ddr->timing_cfg_7 = (0
                             | ((cke_rst & 0x3) << 28)
                             | ((cksre & 0xf) << 24)
                             | ((cksrx & 0xf) << 20)
                             | ((par_lat & 0xf) << 16)
                             | ((cs_to_cmd & 0xf) << 4)
                            );
        debug("FSLDDR: timing_cfg_7 = 0x%08x\n", ddr->timing_cfg_7);
}

static void set_timing_cfg_8(const unsigned int ctrl_num,
                             fsl_ddr_cfg_regs_t *ddr,
                             const memctl_options_t *popts,
                             const common_timing_params_t *common_dimm,
                             unsigned int cas_latency)
{
        int rwt_bg, wrt_bg, rrt_bg, wwt_bg;
        unsigned int acttoact_bg, wrtord_bg, pre_all_rec;
        int tccdl = picos_to_mclk(ctrl_num, common_dimm->tccdl_ps);
        int wr_lat = ((ddr->timing_cfg_2 & 0x00780000) >> 19) +
                      ((ddr->timing_cfg_2 & 0x00040000) >> 14);

        rwt_bg = cas_latency + 2 + 4 - wr_lat;
        if (rwt_bg < tccdl)
                rwt_bg = tccdl - rwt_bg;
        else
                rwt_bg = 0;

        wrt_bg = wr_lat + 4 + 1 - cas_latency;
        if (wrt_bg < tccdl)
                wrt_bg = tccdl - wrt_bg;
        else
                wrt_bg = 0;

        if (popts->burst_length == DDR_BL8) {
                rrt_bg = tccdl - 4;
                wwt_bg = tccdl - 4;
        } else {
                rrt_bg = tccdl - 2;
                wwt_bg = tccdl - 2;
        }

        acttoact_bg = picos_to_mclk(ctrl_num, common_dimm->trrdl_ps);
        wrtord_bg = max(4U, picos_to_mclk(ctrl_num, 7500));
        if (popts->otf_burst_chop_en)
                wrtord_bg += 2;

        pre_all_rec = 0;

        ddr->timing_cfg_8 = (0
                             | ((rwt_bg & 0xf) << 28)
                             | ((wrt_bg & 0xf) << 24)
                             | ((rrt_bg & 0xf) << 20)
                             | ((wwt_bg & 0xf) << 16)
                             | ((acttoact_bg & 0xf) << 12)
                             | ((wrtord_bg & 0xf) << 8)
                             | ((pre_all_rec & 0x1f) << 0)
                            );

        debug("FSLDDR: timing_cfg_8 = 0x%08x\n", ddr->timing_cfg_8);
}

static void set_timing_cfg_9(const unsigned int ctrl_num,
                             fsl_ddr_cfg_regs_t *ddr,
                             const memctl_options_t *popts,
                             const common_timing_params_t *common_dimm)
{
        unsigned int refrec_cid_mclk = 0;
        unsigned int acttoact_cid_mclk = 0;

        if (popts->package_3ds) {
                refrec_cid_mclk =
                        picos_to_mclk(ctrl_num, common_dimm->trfc_slr_ps);
                acttoact_cid_mclk = 4U; /* tRRDS_slr */
        }

        ddr->timing_cfg_9 = (refrec_cid_mclk & 0x3ff) << 16     |
                            (acttoact_cid_mclk & 0xf) << 8;

        debug("FSLDDR: timing_cfg_9 = 0x%08x\n", ddr->timing_cfg_9);
}

/* This function needs to be called after set_ddr_sdram_cfg() is called */
static void set_ddr_dq_mapping(fsl_ddr_cfg_regs_t *ddr,
                               const dimm_params_t *dimm_params)
{
        unsigned int acc_ecc_en = (ddr->ddr_sdram_cfg >> 2) & 0x1;
        int i;

        for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
                if (dimm_params[i].n_ranks)
                        break;
        }
        if (i >= CONFIG_DIMM_SLOTS_PER_CTLR) {
                puts("DDR error: no DIMM found!\n");
                return;
        }

        ddr->dq_map_0 = ((dimm_params[i].dq_mapping[0] & 0x3F) << 26) |
                        ((dimm_params[i].dq_mapping[1] & 0x3F) << 20) |
                        ((dimm_params[i].dq_mapping[2] & 0x3F) << 14) |
                        ((dimm_params[i].dq_mapping[3] & 0x3F) << 8) |
                        ((dimm_params[i].dq_mapping[4] & 0x3F) << 2);

        ddr->dq_map_1 = ((dimm_params[i].dq_mapping[5] & 0x3F) << 26) |
                        ((dimm_params[i].dq_mapping[6] & 0x3F) << 20) |
                        ((dimm_params[i].dq_mapping[7] & 0x3F) << 14) |
                        ((dimm_params[i].dq_mapping[10] & 0x3F) << 8) |
                        ((dimm_params[i].dq_mapping[11] & 0x3F) << 2);

        ddr->dq_map_2 = ((dimm_params[i].dq_mapping[12] & 0x3F) << 26) |
                        ((dimm_params[i].dq_mapping[13] & 0x3F) << 20) |
                        ((dimm_params[i].dq_mapping[14] & 0x3F) << 14) |
                        ((dimm_params[i].dq_mapping[15] & 0x3F) << 8) |
                        ((dimm_params[i].dq_mapping[16] & 0x3F) << 2);

        /* dq_map for ECC[4:7] is set to 0 if accumulated ECC is enabled */
        ddr->dq_map_3 = ((dimm_params[i].dq_mapping[17] & 0x3F) << 26) |
                        ((dimm_params[i].dq_mapping[8] & 0x3F) << 20) |
                        (acc_ecc_en ? 0 :
                         (dimm_params[i].dq_mapping[9] & 0x3F) << 14) |
                        dimm_params[i].dq_mapping_ors;

        debug("FSLDDR: dq_map_0 = 0x%08x\n", ddr->dq_map_0);
        debug("FSLDDR: dq_map_1 = 0x%08x\n", ddr->dq_map_1);
        debug("FSLDDR: dq_map_2 = 0x%08x\n", ddr->dq_map_2);
        debug("FSLDDR: dq_map_3 = 0x%08x\n", ddr->dq_map_3);
}
static void set_ddr_sdram_cfg_3(fsl_ddr_cfg_regs_t *ddr,
                               const memctl_options_t *popts)
{
        int rd_pre;

        rd_pre = popts->quad_rank_present ? 1 : 0;

        ddr->ddr_sdram_cfg_3 = (rd_pre & 0x1) << 16;
        /* Disable MRS on parity error for RDIMMs */
        ddr->ddr_sdram_cfg_3 |= popts->registered_dimm_en ? 1 : 0;

        if (popts->package_3ds) {       /* only 2,4,8 are supported */
                if ((popts->package_3ds + 1) & 0x1) {
                        printf("Error: Unsupported 3DS DIMM with %d die\n",
                               popts->package_3ds + 1);
                } else {
                        ddr->ddr_sdram_cfg_3 |= ((popts->package_3ds + 1) >> 1)
                                                << 4;
                }
        }

        debug("FSLDDR: ddr_sdram_cfg_3 = 0x%08x\n", ddr->ddr_sdram_cfg_3);
}
#endif  /* CONFIG_SYS_FSL_DDR4 */

/* DDR ZQ Calibration Control (DDR_ZQ_CNTL) */
static void set_ddr_zq_cntl(fsl_ddr_cfg_regs_t *ddr, unsigned int zq_en)
{
        unsigned int zqinit = 0;/* POR ZQ Calibration Time (tZQinit) */
        /* Normal Operation Full Calibration Time (tZQoper) */
        unsigned int zqoper = 0;
        /* Normal Operation Short Calibration Time (tZQCS) */
        unsigned int zqcs = 0;
#ifdef CONFIG_SYS_FSL_DDR4
        unsigned int zqcs_init;
#endif

        if (zq_en) {
#ifdef CONFIG_SYS_FSL_DDR4
                zqinit = 10;    /* 1024 clocks */
                zqoper = 9;     /* 512 clocks */
                zqcs = 7;       /* 128 clocks */
                zqcs_init = 5;  /* 1024 refresh sequences */
#else
                zqinit = 9;     /* 512 clocks */
                zqoper = 8;     /* 256 clocks */
                zqcs = 6;       /* 64 clocks */
#endif
        }

        ddr->ddr_zq_cntl = (0
                            | ((zq_en & 0x1) << 31)
                            | ((zqinit & 0xF) << 24)
                            | ((zqoper & 0xF) << 16)
                            | ((zqcs & 0xF) << 8)
#ifdef CONFIG_SYS_FSL_DDR4
                            | ((zqcs_init & 0xF) << 0)
#endif
                            );
        debug("FSLDDR: zq_cntl = 0x%08x\n", ddr->ddr_zq_cntl);
}

/* DDR Write Leveling Control (DDR_WRLVL_CNTL) */
static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr, unsigned int wrlvl_en,
                                const memctl_options_t *popts)
{
        /*
         * First DQS pulse rising edge after margining mode
         * is programmed (tWL_MRD)
         */
        unsigned int wrlvl_mrd = 0;
        /* ODT delay after margining mode is programmed (tWL_ODTEN) */
        unsigned int wrlvl_odten = 0;
        /* DQS/DQS_ delay after margining mode is programmed (tWL_DQSEN) */
        unsigned int wrlvl_dqsen = 0;
        /* WRLVL_SMPL: Write leveling sample time */
        unsigned int wrlvl_smpl = 0;
        /* WRLVL_WLR: Write leveling repeition time */
        unsigned int wrlvl_wlr = 0;
        /* WRLVL_START: Write leveling start time */
        unsigned int wrlvl_start = 0;

        /* suggest enable write leveling for DDR3 due to fly-by topology */
        if (wrlvl_en) {
                /* tWL_MRD min = 40 nCK, we set it 64 */
                wrlvl_mrd = 0x6;
                /* tWL_ODTEN 128 */
                wrlvl_odten = 0x7;
                /* tWL_DQSEN min = 25 nCK, we set it 32 */
                wrlvl_dqsen = 0x5;
                /*
                 * Write leveling sample time at least need 6 clocks
                 * higher than tWLO to allow enough time for progagation
                 * delay and sampling the prime data bits.
                 */
                wrlvl_smpl = 0xf;
                /*
                 * Write leveling repetition time
                 * at least tWLO + 6 clocks clocks
                 * we set it 64
                 */
                wrlvl_wlr = 0x6;
                /*
                 * Write leveling start time
                 * The value use for the DQS_ADJUST for the first sample
                 * when write leveling is enabled. It probably needs to be
                 * overridden per platform.
                 */
                wrlvl_start = 0x8;
                /*
                 * Override the write leveling sample and start time
                 * according to specific board
                 */
                if (popts->wrlvl_override) {
                        wrlvl_smpl = popts->wrlvl_sample;
                        wrlvl_start = popts->wrlvl_start;
                }
        }

        ddr->ddr_wrlvl_cntl = (0
                               | ((wrlvl_en & 0x1) << 31)
                               | ((wrlvl_mrd & 0x7) << 24)
                               | ((wrlvl_odten & 0x7) << 20)
                               | ((wrlvl_dqsen & 0x7) << 16)
                               | ((wrlvl_smpl & 0xf) << 12)
                               | ((wrlvl_wlr & 0x7) << 8)
                               | ((wrlvl_start & 0x1F) << 0)
                               );
        debug("FSLDDR: wrlvl_cntl = 0x%08x\n", ddr->ddr_wrlvl_cntl);
        ddr->ddr_wrlvl_cntl_2 = popts->wrlvl_ctl_2;
        debug("FSLDDR: wrlvl_cntl_2 = 0x%08x\n", ddr->ddr_wrlvl_cntl_2);
        ddr->ddr_wrlvl_cntl_3 = popts->wrlvl_ctl_3;
        debug("FSLDDR: wrlvl_cntl_3 = 0x%08x\n", ddr->ddr_wrlvl_cntl_3);

}

/* DDR Self Refresh Counter (DDR_SR_CNTR) */
static void set_ddr_sr_cntr(fsl_ddr_cfg_regs_t *ddr, unsigned int sr_it)
{
        /* Self Refresh Idle Threshold */
        ddr->ddr_sr_cntr = (sr_it & 0xF) << 16;
}

static void set_ddr_eor(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts)
{
        if (popts->addr_hash) {
                ddr->ddr_eor = 0x40000000;      /* address hash enable */
                puts("Address hashing enabled.\n");
        }
}

static void set_ddr_cdr1(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts)
{
        ddr->ddr_cdr1 = popts->ddr_cdr1;
        debug("FSLDDR: ddr_cdr1 = 0x%08x\n", ddr->ddr_cdr1);
}

static void set_ddr_cdr2(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts)
{
        ddr->ddr_cdr2 = popts->ddr_cdr2;
        debug("FSLDDR: ddr_cdr2 = 0x%08x\n", ddr->ddr_cdr2);
}

unsigned int
check_fsl_memctl_config_regs(const fsl_ddr_cfg_regs_t *ddr)
{
        unsigned int res = 0;

        /*
         * Check that DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] are
         * not set at the same time.
         */
        if (ddr->ddr_sdram_cfg & 0x10000000
            && ddr->ddr_sdram_cfg & 0x00008000) {
                printf("Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] "
                                " should not be set at the same time.\n");
                res++;
        }

        return res;
}

unsigned int
compute_fsl_memctl_config_regs(const unsigned int ctrl_num,
                               const memctl_options_t *popts,
                               fsl_ddr_cfg_regs_t *ddr,
                               const common_timing_params_t *common_dimm,
                               const dimm_params_t *dimm_params,
                               unsigned int dbw_cap_adj,
                               unsigned int size_only)
{
        unsigned int i;
        unsigned int cas_latency;
        unsigned int additive_latency;
        unsigned int sr_it;
        unsigned int zq_en;
        unsigned int wrlvl_en;
        unsigned int ip_rev = 0;
        unsigned int unq_mrs_en = 0;
        int cs_en = 1;

        memset(ddr, 0, sizeof(fsl_ddr_cfg_regs_t));

        if (common_dimm == NULL) {
                printf("Error: subset DIMM params struct null pointer\n");
                return 1;
        }

        /*
         * Process overrides first.
         *
         * FIXME: somehow add dereated caslat to this
         */
        cas_latency = (popts->cas_latency_override)
                ? popts->cas_latency_override_value
                : common_dimm->lowest_common_spd_caslat;

        additive_latency = (popts->additive_latency_override)
                ? popts->additive_latency_override_value
                : common_dimm->additive_latency;

        sr_it = (popts->auto_self_refresh_en)
                ? popts->sr_it
                : 0;
        /* ZQ calibration */
        zq_en = (popts->zq_en) ? 1 : 0;
        /* write leveling */
        wrlvl_en = (popts->wrlvl_en) ? 1 : 0;

        /* Chip Select Memory Bounds (CSn_BNDS) */
        for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
                unsigned long long ea, sa;
                unsigned int cs_per_dimm
                        = CONFIG_CHIP_SELECTS_PER_CTRL / CONFIG_DIMM_SLOTS_PER_CTLR;
                unsigned int dimm_number
                        = i / cs_per_dimm;
                unsigned long long rank_density
                        = dimm_params[dimm_number].rank_density >> dbw_cap_adj;

                if (dimm_params[dimm_number].n_ranks == 0) {
                        debug("Skipping setup of CS%u "
                                "because n_ranks on DIMM %u is 0\n", i, dimm_number);
                        continue;
                }
                if (popts->memctl_interleaving) {
                        switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
                        case FSL_DDR_CS0_CS1_CS2_CS3:
                                break;
                        case FSL_DDR_CS0_CS1:
                        case FSL_DDR_CS0_CS1_AND_CS2_CS3:
                                if (i > 1)
                                        cs_en = 0;
                                break;
                        case FSL_DDR_CS2_CS3:
                        default:
                                if (i > 0)
                                        cs_en = 0;
                                break;
                        }
                        sa = common_dimm->base_address;
                        ea = sa + common_dimm->total_mem - 1;
                } else if (!popts->memctl_interleaving) {
                        /*
                         * If memory interleaving between controllers is NOT
                         * enabled, the starting address for each memory
                         * controller is distinct.  However, because rank
                         * interleaving is enabled, the starting and ending
                         * addresses of the total memory on that memory
                         * controller needs to be programmed into its
                         * respective CS0_BNDS.
                         */
                        switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
                        case FSL_DDR_CS0_CS1_CS2_CS3:
                                sa = common_dimm->base_address;
                                ea = sa + common_dimm->total_mem - 1;
                                break;
                        case FSL_DDR_CS0_CS1_AND_CS2_CS3:
                                if ((i >= 2) && (dimm_number == 0)) {
                                        sa = dimm_params[dimm_number].base_address +
                                              2 * rank_density;
                                        ea = sa + 2 * rank_density - 1;
                                } else {
                                        sa = dimm_params[dimm_number].base_address;
                                        ea = sa + 2 * rank_density - 1;
                                }
                                break;
                        case FSL_DDR_CS0_CS1:
                                if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
                                        sa = dimm_params[dimm_number].base_address;
                                        ea = sa + rank_density - 1;
                                        if (i != 1)
                                                sa += (i % cs_per_dimm) * rank_density;
                                        ea += (i % cs_per_dimm) * rank_density;
                                } else {
                                        sa = 0;
                                        ea = 0;
                                }
                                if (i == 0)
                                        ea += rank_density;
                                break;
                        case FSL_DDR_CS2_CS3:
                                if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
                                        sa = dimm_params[dimm_number].base_address;
                                        ea = sa + rank_density - 1;
                                        if (i != 3)
                                                sa += (i % cs_per_dimm) * rank_density;
                                        ea += (i % cs_per_dimm) * rank_density;
                                } else {
                                        sa = 0;
                                        ea = 0;
                                }
                                if (i == 2)
                                        ea += (rank_density >> dbw_cap_adj);
                                break;
                        default:  /* No bank(chip-select) interleaving */
                                sa = dimm_params[dimm_number].base_address;
                                ea = sa + rank_density - 1;
                                if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
                                        sa += (i % cs_per_dimm) * rank_density;
                                        ea += (i % cs_per_dimm) * rank_density;
                                } else {
                                        sa = 0;
                                        ea = 0;
                                }
                                break;
                        }
                }

                sa >>= 24;
                ea >>= 24;

                if (cs_en) {
                        ddr->cs[i].bnds = (0
                                | ((sa & 0xffff) << 16) /* starting address */
                                | ((ea & 0xffff) << 0)  /* ending address */
                                );
                } else {
                        /* setting bnds to 0xffffffff for inactive CS */
                        ddr->cs[i].bnds = 0xffffffff;
                }

                debug("FSLDDR: cs[%d]_bnds = 0x%08x\n", i, ddr->cs[i].bnds);
                set_csn_config(dimm_number, i, ddr, popts, dimm_params);
                set_csn_config_2(i, ddr);
        }

        /*
         * In the case we only need to compute the ddr sdram size, we only need
         * to set csn registers, so return from here.
         */
        if (size_only)
                return 0;

        set_ddr_eor(ddr, popts);

#if !defined(CONFIG_SYS_FSL_DDR1)
        set_timing_cfg_0(ctrl_num, ddr, popts, dimm_params);
#endif

        set_timing_cfg_3(ctrl_num, ddr, popts, common_dimm, cas_latency,
                         additive_latency);
        set_timing_cfg_1(ctrl_num, ddr, popts, common_dimm, cas_latency);
        set_timing_cfg_2(ctrl_num, ddr, popts, common_dimm,
                         cas_latency, additive_latency);

        set_ddr_cdr1(ddr, popts);
        set_ddr_cdr2(ddr, popts);
        set_ddr_sdram_cfg(ddr, popts, common_dimm);
        ip_rev = fsl_ddr_get_version(ctrl_num);
        if (ip_rev > 0x40400)
                unq_mrs_en = 1;

        if ((ip_rev > 0x40700) && (popts->cswl_override != 0))
                ddr->debug[18] = popts->cswl_override;

        set_ddr_sdram_cfg_2(ctrl_num, ddr, popts, unq_mrs_en);
        set_ddr_sdram_mode(ctrl_num, ddr, popts, common_dimm,
                           cas_latency, additive_latency, unq_mrs_en);
        set_ddr_sdram_mode_2(ctrl_num, ddr, popts, common_dimm, unq_mrs_en);
#ifdef CONFIG_SYS_FSL_DDR4
        set_ddr_sdram_mode_9(ddr, popts, common_dimm, unq_mrs_en);
        set_ddr_sdram_mode_10(ctrl_num, ddr, popts, common_dimm, unq_mrs_en);
#endif
        set_ddr_sdram_rcw(ctrl_num, ddr, popts, common_dimm);

        set_ddr_sdram_interval(ctrl_num, ddr, popts, common_dimm);
        set_ddr_data_init(ddr);
        set_ddr_sdram_clk_cntl(ddr, popts);
        set_ddr_init_addr(ddr);
        set_ddr_init_ext_addr(ddr);
        set_timing_cfg_4(ddr, popts);
        set_timing_cfg_5(ddr, cas_latency);
#ifdef CONFIG_SYS_FSL_DDR4
        set_ddr_sdram_cfg_3(ddr, popts);
        set_timing_cfg_6(ddr);
        set_timing_cfg_7(ctrl_num, ddr, popts, common_dimm);
        set_timing_cfg_8(ctrl_num, ddr, popts, common_dimm, cas_latency);
        set_timing_cfg_9(ctrl_num, ddr, popts, common_dimm);
        set_ddr_dq_mapping(ddr, dimm_params);
#endif

        set_ddr_zq_cntl(ddr, zq_en);
        set_ddr_wrlvl_cntl(ddr, wrlvl_en, popts);

        set_ddr_sr_cntr(ddr, sr_it);

#ifdef CONFIG_SYS_FSL_DDR_EMU
        /* disble DDR training for emulator */
        ddr->debug[2] = 0x00000400;
        ddr->debug[4] = 0xff800800;
        ddr->debug[5] = 0x08000800;
        ddr->debug[6] = 0x08000800;
        ddr->debug[7] = 0x08000800;
        ddr->debug[8] = 0x08000800;
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_A004508
        if ((ip_rev >= 0x40000) && (ip_rev < 0x40400))
                ddr->debug[2] |= 0x00000200;    /* set bit 22 */
#endif

#ifdef CONFIG_SYS_FSL_ERRATUM_A009942
        if (popts->cpo_sample)
                ddr->debug[28] = (ddr->debug[28] & 0xffffff00) |
                                  popts->cpo_sample;
#endif

        return check_fsl_memctl_config_regs(ddr);
}

#ifdef CONFIG_SYS_FSL_ERRATUM_A009942
/*
 * This additional workaround of A009942 checks the condition to determine if
 * the CPO value set by the existing A009942 workaround needs to be updated.
 * If need, print a warning to prompt user reconfigure DDR debug_29[24:31] with
 * expected optimal value, the optimal value is highly board dependent.
 */
void erratum_a009942_check_cpo(void)
{
        struct ccsr_ddr __iomem *ddr =
                (struct ccsr_ddr __iomem *)(CONFIG_SYS_FSL_DDR_ADDR);
        u32 cpo, cpo_e, cpo_o, cpo_target, cpo_optimal;
        u32 cpo_min = ddr_in32(&ddr->debug[9]) >> 24;
        u32 cpo_max = cpo_min;
        u32 sdram_cfg, i, tmp, lanes, ddr_type;
        bool update_cpo = false, has_ecc = false;

        sdram_cfg = ddr_in32(&ddr->sdram_cfg);
        if (sdram_cfg & SDRAM_CFG_32_BE)
                lanes = 4;
        else if (sdram_cfg & SDRAM_CFG_16_BE)
                lanes = 2;
        else
                lanes = 8;

        if (sdram_cfg & SDRAM_CFG_ECC_EN)
                has_ecc = true;

        /* determine the maximum and minimum CPO values */
        for (i = 9; i < 9 + lanes / 2; i++) {
                cpo = ddr_in32(&ddr->debug[i]);
                cpo_e = cpo >> 24;
                cpo_o = (cpo >> 8) & 0xff;
                tmp = min(cpo_e, cpo_o);
                if (tmp < cpo_min)
                        cpo_min = tmp;
                tmp = max(cpo_e, cpo_o);
                if (tmp > cpo_max)
                        cpo_max = tmp;
        }

        if (has_ecc) {
                cpo = ddr_in32(&ddr->debug[13]);
                cpo = cpo >> 24;
                if (cpo < cpo_min)
                        cpo_min = cpo;
                if (cpo > cpo_max)
                        cpo_max = cpo;
        }

        cpo_target = ddr_in32(&ddr->debug[28]) & 0xff;
        cpo_optimal = ((cpo_max + cpo_min) >> 1) + 0x27;
        debug("cpo_optimal = 0x%x, cpo_target = 0x%x\n", cpo_optimal,
              cpo_target);
        debug("cpo_max = 0x%x, cpo_min = 0x%x\n", cpo_max, cpo_min);

        ddr_type = (sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK) >>
                    SDRAM_CFG_SDRAM_TYPE_SHIFT;
        if (ddr_type == SDRAM_TYPE_DDR4)
                update_cpo = (cpo_min + 0x3b) < cpo_target ? true : false;
        else if (ddr_type == SDRAM_TYPE_DDR3)
                update_cpo = (cpo_min + 0x3f) < cpo_target ? true : false;

        if (update_cpo) {
                printf("WARN: pls set popts->cpo_sample = 0x%x ", cpo_optimal);
                printf("in <board>/ddr.c to optimize cpo\n");
        }
}
#endif