/*
 * (C) Copyright 2015 Google, Inc
 * Copyright 2014 Rockchip Inc.
 *
 * SPDX-License-Identifier:     GPL-2.0
 *
 * Adapted from the very similar rk3288 ddr init.
 */

#include <common.h>
#include <clk.h>
#include <dm.h>
#include <dt-structs.h>
#include <errno.h>
#include <ram.h>
#include <regmap.h>
#include <syscon.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/cru_rk3188.h>
#include <asm/arch/ddr_rk3188.h>
#include <asm/arch/grf_rk3188.h>
#include <asm/arch/pmu_rk3188.h>
#include <asm/arch/sdram.h>
#include <asm/arch/sdram_common.h>
#include <linux/err.h>

DECLARE_GLOBAL_DATA_PTR;

struct chan_info {
        struct rk3288_ddr_pctl *pctl;
        struct rk3288_ddr_publ *publ;
        struct rk3188_msch *msch;
};

struct dram_info {
        struct chan_info chan[1];
        struct ram_info info;
        struct clk ddr_clk;
        struct rk3188_cru *cru;
        struct rk3188_grf *grf;
        struct rk3188_sgrf *sgrf;
        struct rk3188_pmu *pmu;
};

struct rk3188_sdram_params {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
        struct dtd_rockchip_rk3188_dmc of_plat;
#endif
        struct rk3288_sdram_channel ch[2];
        struct rk3288_sdram_pctl_timing pctl_timing;
        struct rk3288_sdram_phy_timing phy_timing;
        struct rk3288_base_params base;
        int num_channels;
        struct regmap *map;
};

const int ddrconf_table[] = {
        /*
         * [5:4] row(13+n)
         * [1:0] col(9+n), assume bw=2
         * row      col,bw
         */
        0,
        ((2 << DDRCONF_ROW_SHIFT) | 1 << DDRCONF_COL_SHIFT),
        ((1 << DDRCONF_ROW_SHIFT) | 1 << DDRCONF_COL_SHIFT),
        ((0 << DDRCONF_ROW_SHIFT) | 1 << DDRCONF_COL_SHIFT),
        ((2 << DDRCONF_ROW_SHIFT) | 2 << DDRCONF_COL_SHIFT),
        ((1 << DDRCONF_ROW_SHIFT) | 2 << DDRCONF_COL_SHIFT),
        ((0 << DDRCONF_ROW_SHIFT) | 2 << DDRCONF_COL_SHIFT),
        ((1 << DDRCONF_ROW_SHIFT) | 0 << DDRCONF_COL_SHIFT),
        ((0 << DDRCONF_ROW_SHIFT) | 0 << DDRCONF_COL_SHIFT),
        0,
        0,
        0,
        0,
        0,
        0,
        0,
};

#define TEST_PATTEN     0x5aa5f00f
#define DQS_GATE_TRAINING_ERROR_RANK0   (1 << 4)
#define DQS_GATE_TRAINING_ERROR_RANK1   (2 << 4)

#ifdef CONFIG_SPL_BUILD
static void copy_to_reg(u32 *dest, const u32 *src, u32 n)
{
        int i;

        for (i = 0; i < n / sizeof(u32); i++) {
                writel(*src, dest);
                src++;
                dest++;
        }
}

static void ddr_reset(struct rk3188_cru *cru, u32 ch, u32 ctl, u32 phy)
{
        u32 phy_ctl_srstn_shift = 13;
        u32 ctl_psrstn_shift = 11;
        u32 ctl_srstn_shift = 10;
        u32 phy_psrstn_shift = 9;
        u32 phy_srstn_shift = 8;

        rk_clrsetreg(&cru->cru_softrst_con[5],
                     1 << phy_ctl_srstn_shift | 1 << ctl_psrstn_shift |
                     1 << ctl_srstn_shift | 1 << phy_psrstn_shift |
                     1 << phy_srstn_shift,
                     phy << phy_ctl_srstn_shift | ctl << ctl_psrstn_shift |
                     ctl << ctl_srstn_shift | phy << phy_psrstn_shift |
                     phy << phy_srstn_shift);
}

static void ddr_phy_ctl_reset(struct rk3188_cru *cru, u32 ch, u32 n)
{
        u32 phy_ctl_srstn_shift = 13;

        rk_clrsetreg(&cru->cru_softrst_con[5],
                     1 << phy_ctl_srstn_shift, n << phy_ctl_srstn_shift);
}

static void phy_pctrl_reset(struct rk3188_cru *cru,
                            struct rk3288_ddr_publ *publ,
                            int channel)
{
        int i;

        ddr_reset(cru, channel, 1, 1);
        udelay(1);
        clrbits_le32(&publ->acdllcr, ACDLLCR_DLLSRST);
        for (i = 0; i < 4; i++)
                clrbits_le32(&publ->datx8[i].dxdllcr, DXDLLCR_DLLSRST);

        udelay(10);
        setbits_le32(&publ->acdllcr, ACDLLCR_DLLSRST);
        for (i = 0; i < 4; i++)
                setbits_le32(&publ->datx8[i].dxdllcr, DXDLLCR_DLLSRST);

        udelay(10);
        ddr_reset(cru, channel, 1, 0);
        udelay(10);
        ddr_reset(cru, channel, 0, 0);
        udelay(10);
}

static void phy_dll_bypass_set(struct rk3288_ddr_publ *publ,
        u32 freq)
{
        int i;

        if (freq <= 250000000) {
                if (freq <= 150000000)
                        clrbits_le32(&publ->dllgcr, SBIAS_BYPASS);
                else
                        setbits_le32(&publ->dllgcr, SBIAS_BYPASS);
                setbits_le32(&publ->acdllcr, ACDLLCR_DLLDIS);
                for (i = 0; i < 4; i++)
                        setbits_le32(&publ->datx8[i].dxdllcr,
                                     DXDLLCR_DLLDIS);

                setbits_le32(&publ->pir, PIR_DLLBYP);
        } else {
                clrbits_le32(&publ->dllgcr, SBIAS_BYPASS);
                clrbits_le32(&publ->acdllcr, ACDLLCR_DLLDIS);
                for (i = 0; i < 4; i++) {
                        clrbits_le32(&publ->datx8[i].dxdllcr,
                                     DXDLLCR_DLLDIS);
                }

                clrbits_le32(&publ->pir, PIR_DLLBYP);
        }
}

static void dfi_cfg(struct rk3288_ddr_pctl *pctl, u32 dramtype)
{
        writel(DFI_INIT_START, &pctl->dfistcfg0);
        writel(DFI_DRAM_CLK_SR_EN | DFI_DRAM_CLK_DPD_EN,
               &pctl->dfistcfg1);
        writel(DFI_PARITY_INTR_EN | DFI_PARITY_EN, &pctl->dfistcfg2);
        writel(7 << TLP_RESP_TIME_SHIFT | LP_SR_EN | LP_PD_EN,
               &pctl->dfilpcfg0);

        writel(2 << TCTRL_DELAY_TIME_SHIFT, &pctl->dfitctrldelay);
        writel(1 << TPHY_WRDATA_TIME_SHIFT, &pctl->dfitphywrdata);
        writel(0xf << TPHY_RDLAT_TIME_SHIFT, &pctl->dfitphyrdlat);
        writel(2 << TDRAM_CLK_DIS_TIME_SHIFT, &pctl->dfitdramclkdis);
        writel(2 << TDRAM_CLK_EN_TIME_SHIFT, &pctl->dfitdramclken);
        writel(1, &pctl->dfitphyupdtype0);

        /* cs0 and cs1 write odt enable */
        writel((RANK0_ODT_WRITE_SEL | RANK1_ODT_WRITE_SEL),
               &pctl->dfiodtcfg);
        /* odt write length */
        writel(7 << ODT_LEN_BL8_W_SHIFT, &pctl->dfiodtcfg1);
        /* phyupd and ctrlupd disabled */
        writel(0, &pctl->dfiupdcfg);
}

static void ddr_set_enable(struct rk3188_grf *grf, uint channel, bool enable)
{
        uint val = 0;

        if (enable)
                val = 1 << DDR_16BIT_EN_SHIFT;

        rk_clrsetreg(&grf->ddrc_con0, 1 << DDR_16BIT_EN_SHIFT, val);
}

static void ddr_set_ddr3_mode(struct rk3188_grf *grf, uint channel,
                              bool ddr3_mode)
{
        uint mask, val;

        mask = MSCH4_MAINDDR3_MASK << MSCH4_MAINDDR3_SHIFT;
        val = ddr3_mode << MSCH4_MAINDDR3_SHIFT;
        rk_clrsetreg(&grf->soc_con2, mask, val);
}

static void ddr_rank_2_row15en(struct rk3188_grf *grf, bool enable)
{
        uint mask, val;

        mask = RANK_TO_ROW15_EN_MASK << RANK_TO_ROW15_EN_SHIFT;
        val = enable << RANK_TO_ROW15_EN_SHIFT;
        rk_clrsetreg(&grf->soc_con2, mask, val);
}

static void pctl_cfg(int channel, struct rk3288_ddr_pctl *pctl,
                     struct rk3188_sdram_params *sdram_params,
                     struct rk3188_grf *grf)
{
        copy_to_reg(&pctl->togcnt1u, &sdram_params->pctl_timing.togcnt1u,
                    sizeof(sdram_params->pctl_timing));
        switch (sdram_params->base.dramtype) {
        case DDR3:
                if (sdram_params->phy_timing.mr[1] & DDR3_DLL_DISABLE) {
                        writel(sdram_params->pctl_timing.tcl - 3,
                               &pctl->dfitrddataen);
                } else {
                        writel(sdram_params->pctl_timing.tcl - 2,
                               &pctl->dfitrddataen);
                }
                writel(sdram_params->pctl_timing.tcwl - 1,
                       &pctl->dfitphywrlat);
                writel(0 << MDDR_LPDDR2_CLK_STOP_IDLE_SHIFT | DDR3_EN |
                       DDR2_DDR3_BL_8 | (6 - 4) << TFAW_SHIFT | PD_EXIT_SLOW |
                       1 << PD_TYPE_SHIFT | 0 << PD_IDLE_SHIFT,
                       &pctl->mcfg);
                ddr_set_ddr3_mode(grf, channel, true);
                ddr_set_enable(grf, channel, true);
                break;
        }

        setbits_le32(&pctl->scfg, 1);
}

static void phy_cfg(const struct chan_info *chan, int channel,
                    struct rk3188_sdram_params *sdram_params)
{
        struct rk3288_ddr_publ *publ = chan->publ;
        struct rk3188_msch *msch = chan->msch;
        uint ddr_freq_mhz = sdram_params->base.ddr_freq / 1000000;
        u32 dinit2;
        int i;

        dinit2 = DIV_ROUND_UP(ddr_freq_mhz * 200000, 1000);
        /* DDR PHY Timing */
        copy_to_reg(&publ->dtpr[0], &sdram_params->phy_timing.dtpr0,
                    sizeof(sdram_params->phy_timing));
        writel(sdram_params->base.noc_timing, &msch->ddrtiming);
        writel(0x3f, &msch->readlatency);
        writel(DIV_ROUND_UP(ddr_freq_mhz * 5120, 1000) << PRT_DLLLOCK_SHIFT |
               DIV_ROUND_UP(ddr_freq_mhz * 50, 1000) << PRT_DLLSRST_SHIFT |
               8 << PRT_ITMSRST_SHIFT, &publ->ptr[0]);
        writel(DIV_ROUND_UP(ddr_freq_mhz * 500000, 1000) << PRT_DINIT0_SHIFT |
               DIV_ROUND_UP(ddr_freq_mhz * 400, 1000) << PRT_DINIT1_SHIFT,
               &publ->ptr[1]);
        writel(min(dinit2, 0x1ffffU) << PRT_DINIT2_SHIFT |
               DIV_ROUND_UP(ddr_freq_mhz * 1000, 1000) << PRT_DINIT3_SHIFT,
               &publ->ptr[2]);

        switch (sdram_params->base.dramtype) {
        case DDR3:
                clrbits_le32(&publ->pgcr, 0x1f);
                clrsetbits_le32(&publ->dcr, DDRMD_MASK << DDRMD_SHIFT,
                                DDRMD_DDR3 << DDRMD_SHIFT);
                break;
        }
        if (sdram_params->base.odt) {
                /*dynamic RTT enable */
                for (i = 0; i < 4; i++)
                        setbits_le32(&publ->datx8[i].dxgcr, DQSRTT | DQRTT);
        } else {
                /*dynamic RTT disable */
                for (i = 0; i < 4; i++)
                        clrbits_le32(&publ->datx8[i].dxgcr, DQSRTT | DQRTT);
        }
}

static void phy_init(struct rk3288_ddr_publ *publ)
{
        setbits_le32(&publ->pir, PIR_INIT | PIR_DLLSRST
                | PIR_DLLLOCK | PIR_ZCAL | PIR_ITMSRST | PIR_CLRSR);
        udelay(1);
        while ((readl(&publ->pgsr) &
                (PGSR_IDONE | PGSR_DLDONE | PGSR_ZCDONE)) !=
                (PGSR_IDONE | PGSR_DLDONE | PGSR_ZCDONE))
                ;
}

static void send_command(struct rk3288_ddr_pctl *pctl, u32 rank,
                         u32 cmd, u32 arg)
{
        writel((START_CMD | (rank << 20) | arg | cmd), &pctl->mcmd);
        udelay(1);
        while (readl(&pctl->mcmd) & START_CMD)
                ;
}

static inline void send_command_op(struct rk3288_ddr_pctl *pctl,
                                   u32 rank, u32 cmd, u32 ma, u32 op)
{
        send_command(pctl, rank, cmd, (ma & LPDDR2_MA_MASK) << LPDDR2_MA_SHIFT |
                     (op & LPDDR2_OP_MASK) << LPDDR2_OP_SHIFT);
}

static void memory_init(struct rk3288_ddr_publ *publ,
                        u32 dramtype)
{
        setbits_le32(&publ->pir,
                     (PIR_INIT | PIR_DRAMINIT | PIR_LOCKBYP
                      | PIR_ZCALBYP | PIR_CLRSR | PIR_ICPC
                      | (dramtype == DDR3 ? PIR_DRAMRST : 0)));
        udelay(1);
        while ((readl(&publ->pgsr) & (PGSR_IDONE | PGSR_DLDONE))
                != (PGSR_IDONE | PGSR_DLDONE))
                ;
}

static void move_to_config_state(struct rk3288_ddr_publ *publ,
                                 struct rk3288_ddr_pctl *pctl)
{
        unsigned int state;

        while (1) {
                state = readl(&pctl->stat) & PCTL_STAT_MSK;

                switch (state) {
                case LOW_POWER:
                        writel(WAKEUP_STATE, &pctl->sctl);
                        while ((readl(&pctl->stat) & PCTL_STAT_MSK)
                                != ACCESS)
                                ;
                        /* wait DLL lock */
                        while ((readl(&publ->pgsr) & PGSR_DLDONE)
                                != PGSR_DLDONE)
                                ;
                        /*
                         * if at low power state,need wakeup first,
                         * and then enter the config, so
                         * fallthrough
                         */
                case ACCESS:
                        /* fallthrough */
                case INIT_MEM:
                        writel(CFG_STATE, &pctl->sctl);
                        while ((readl(&pctl->stat) & PCTL_STAT_MSK) != CONFIG)
                                ;
                        break;
                case CONFIG:
                        return;
                default:
                        break;
                }
        }
}

static void set_bandwidth_ratio(const struct chan_info *chan, int channel,
                                u32 n, struct rk3188_grf *grf)
{
        struct rk3288_ddr_pctl *pctl = chan->pctl;
        struct rk3288_ddr_publ *publ = chan->publ;
        struct rk3188_msch *msch = chan->msch;

        if (n == 1) {
                setbits_le32(&pctl->ppcfg, 1);
                ddr_set_enable(grf, channel, 1);
                setbits_le32(&msch->ddrtiming, 1 << 31);
                /* Data Byte disable*/
                clrbits_le32(&publ->datx8[2].dxgcr, 1);
                clrbits_le32(&publ->datx8[3].dxgcr, 1);
                /* disable DLL */
                setbits_le32(&publ->datx8[2].dxdllcr, DXDLLCR_DLLDIS);
                setbits_le32(&publ->datx8[3].dxdllcr, DXDLLCR_DLLDIS);
        } else {
                clrbits_le32(&pctl->ppcfg, 1);
                ddr_set_enable(grf, channel, 0);
                clrbits_le32(&msch->ddrtiming, 1 << 31);
                /* Data Byte enable*/
                setbits_le32(&publ->datx8[2].dxgcr, 1);
                setbits_le32(&publ->datx8[3].dxgcr, 1);

                /* enable DLL */
                clrbits_le32(&publ->datx8[2].dxdllcr, DXDLLCR_DLLDIS);
                clrbits_le32(&publ->datx8[3].dxdllcr, DXDLLCR_DLLDIS);
                /* reset DLL */
                clrbits_le32(&publ->datx8[2].dxdllcr, DXDLLCR_DLLSRST);
                clrbits_le32(&publ->datx8[3].dxdllcr, DXDLLCR_DLLSRST);
                udelay(10);
                setbits_le32(&publ->datx8[2].dxdllcr, DXDLLCR_DLLSRST);
                setbits_le32(&publ->datx8[3].dxdllcr, DXDLLCR_DLLSRST);
        }
        setbits_le32(&pctl->dfistcfg0, 1 << 2);
}

static int data_training(const struct chan_info *chan, int channel,
                         struct rk3188_sdram_params *sdram_params)
{
        unsigned int j;
        int ret = 0;
        u32 rank;
        int i;
        u32 step[2] = { PIR_QSTRN, PIR_RVTRN };
        struct rk3288_ddr_publ *publ = chan->publ;
        struct rk3288_ddr_pctl *pctl = chan->pctl;

        /* disable auto refresh */
        writel(0, &pctl->trefi);

        if (sdram_params->base.dramtype != LPDDR3)
                setbits_le32(&publ->pgcr, 1 << PGCR_DQSCFG_SHIFT);
        rank = sdram_params->ch[channel].rank | 1;
        for (j = 0; j < ARRAY_SIZE(step); j++) {
                /*
                 * trigger QSTRN and RVTRN
                 * clear DTDONE status
                 */
                setbits_le32(&publ->pir, PIR_CLRSR);

                /* trigger DTT */
                setbits_le32(&publ->pir,
                             PIR_INIT | step[j] | PIR_LOCKBYP | PIR_ZCALBYP |
                             PIR_CLRSR);
                udelay(1);
                /* wait echo byte DTDONE */
                while ((readl(&publ->datx8[0].dxgsr[0]) & rank)
                        != rank)
                        ;
                while ((readl(&publ->datx8[1].dxgsr[0]) & rank)
                        != rank)
                        ;
                if (!(readl(&pctl->ppcfg) & 1)) {
                        while ((readl(&publ->datx8[2].dxgsr[0])
                                & rank) != rank)
                                ;
                        while ((readl(&publ->datx8[3].dxgsr[0])
                                & rank) != rank)
                                ;
                }
                if (readl(&publ->pgsr) &
                    (PGSR_DTERR | PGSR_RVERR | PGSR_RVEIRR)) {
                        ret = -1;
                        break;
                }
        }
        /* send some auto refresh to complement the lost while DTT */
        for (i = 0; i < (rank > 1 ? 8 : 4); i++)
                send_command(pctl, rank, REF_CMD, 0);

        if (sdram_params->base.dramtype != LPDDR3)
                clrbits_le32(&publ->pgcr, 1 << PGCR_DQSCFG_SHIFT);

        /* resume auto refresh */
        writel(sdram_params->pctl_timing.trefi, &pctl->trefi);

        return ret;
}

static void move_to_access_state(const struct chan_info *chan)
{
        struct rk3288_ddr_publ *publ = chan->publ;
        struct rk3288_ddr_pctl *pctl = chan->pctl;
        unsigned int state;

        while (1) {
                state = readl(&pctl->stat) & PCTL_STAT_MSK;

                switch (state) {
                case LOW_POWER:
                        if (((readl(&pctl->stat) >> LP_TRIG_SHIFT) &
                                        LP_TRIG_MASK) == 1)
                                return;

                        writel(WAKEUP_STATE, &pctl->sctl);
                        while ((readl(&pctl->stat) & PCTL_STAT_MSK) != ACCESS)
                                ;
                        /* wait DLL lock */
                        while ((readl(&publ->pgsr) & PGSR_DLDONE)
                                != PGSR_DLDONE)
                                ;
                        break;
                case INIT_MEM:
                        writel(CFG_STATE, &pctl->sctl);
                        while ((readl(&pctl->stat) & PCTL_STAT_MSK) != CONFIG)
                                ;
                        /* fallthrough */
                case CONFIG:
                        writel(GO_STATE, &pctl->sctl);
                        while ((readl(&pctl->stat) & PCTL_STAT_MSK) == CONFIG)
                                ;
                        break;
                case ACCESS:
                        return;
                default:
                        break;
                }
        }
}

static void dram_cfg_rbc(const struct chan_info *chan, u32 chnum,
                         struct rk3188_sdram_params *sdram_params)
{
        struct rk3288_ddr_publ *publ = chan->publ;

        if (sdram_params->ch[chnum].bk == 3)
                clrsetbits_le32(&publ->dcr, PDQ_MASK << PDQ_SHIFT,
                                1 << PDQ_SHIFT);
        else
                clrbits_le32(&publ->dcr, PDQ_MASK << PDQ_SHIFT);

        writel(sdram_params->base.ddrconfig, &chan->msch->ddrconf);
}

static void dram_all_config(const struct dram_info *dram,
                            struct rk3188_sdram_params *sdram_params)
{
        unsigned int chan;
        u32 sys_reg = 0;

        sys_reg |= sdram_params->base.dramtype << SYS_REG_DDRTYPE_SHIFT;
        sys_reg |= (sdram_params->num_channels - 1) << SYS_REG_NUM_CH_SHIFT;
        for (chan = 0; chan < sdram_params->num_channels; chan++) {
                const struct rk3288_sdram_channel *info =
                        &sdram_params->ch[chan];

                sys_reg |= info->row_3_4 << SYS_REG_ROW_3_4_SHIFT(chan);
                sys_reg |= 1 << SYS_REG_CHINFO_SHIFT(chan);
                sys_reg |= (info->rank - 1) << SYS_REG_RANK_SHIFT(chan);
                sys_reg |= (info->col - 9) << SYS_REG_COL_SHIFT(chan);
                sys_reg |= info->bk == 3 ? 0 : 1 << SYS_REG_BK_SHIFT(chan);
                sys_reg |= (info->cs0_row - 13) << SYS_REG_CS0_ROW_SHIFT(chan);
                sys_reg |= (info->cs1_row - 13) << SYS_REG_CS1_ROW_SHIFT(chan);
                sys_reg |= (2 >> info->bw) << SYS_REG_BW_SHIFT(chan);
                sys_reg |= (2 >> info->dbw) << SYS_REG_DBW_SHIFT(chan);

                dram_cfg_rbc(&dram->chan[chan], chan, sdram_params);
        }
        if (sdram_params->ch[0].rank == 2)
                ddr_rank_2_row15en(dram->grf, 0);
        else
                ddr_rank_2_row15en(dram->grf, 1);

        writel(sys_reg, &dram->pmu->sys_reg[2]);
}

static int sdram_rank_bw_detect(struct dram_info *dram, int channel,
                struct rk3188_sdram_params *sdram_params)
{
        int reg;
        int need_trainig = 0;
        const struct chan_info *chan = &dram->chan[channel];
        struct rk3288_ddr_publ *publ = chan->publ;

        ddr_rank_2_row15en(dram->grf, 0);

        if (data_training(chan, channel, sdram_params) < 0) {
                printf("first data training fail!\n");
                reg = readl(&publ->datx8[0].dxgsr[0]);
                /* Check the result for rank 0 */
                if ((channel == 0) && (reg & DQS_GATE_TRAINING_ERROR_RANK0)) {
                        printf("data training fail!\n");
                        return -EIO;
                }

                /* Check the result for rank 1 */
                if (reg & DQS_GATE_TRAINING_ERROR_RANK1) {
                        sdram_params->ch[channel].rank = 1;
                        clrsetbits_le32(&publ->pgcr, 0xF << 18,
                                        sdram_params->ch[channel].rank << 18);
                        need_trainig = 1;
                }
                reg = readl(&publ->datx8[2].dxgsr[0]);
                if (reg & (1 << 4)) {
                        sdram_params->ch[channel].bw = 1;
                        set_bandwidth_ratio(chan, channel,
                                            sdram_params->ch[channel].bw,
                                            dram->grf);
                        need_trainig = 1;
                }
        }
        /* Assume the Die bit width are the same with the chip bit width */
        sdram_params->ch[channel].dbw = sdram_params->ch[channel].bw;

        if (need_trainig &&
            (data_training(chan, channel, sdram_params) < 0)) {
                if (sdram_params->base.dramtype == LPDDR3) {
                        ddr_phy_ctl_reset(dram->cru, channel, 1);
                        udelay(10);
                        ddr_phy_ctl_reset(dram->cru, channel, 0);
                        udelay(10);
                }
                printf("2nd data training failed!");
                return -EIO;
        }

        return 0;
}

/*
 * Detect ram columns and rows.
 * @dram: dram info struct
 * @channel: channel number to handle
 * @sdram_params: sdram parameters, function will fill in col and row values
 *
 * Returns 0 or negative on error.
 */
static int sdram_col_row_detect(struct dram_info *dram, int channel,
                struct rk3188_sdram_params *sdram_params)
{
        int row, col;
        unsigned int addr;
        const struct chan_info *chan = &dram->chan[channel];
        struct rk3288_ddr_pctl *pctl = chan->pctl;
        struct rk3288_ddr_publ *publ = chan->publ;
        int ret = 0;

        /* Detect col */
        for (col = 11; col >= 9; col--) {
                writel(0, CONFIG_SYS_SDRAM_BASE);
                addr = CONFIG_SYS_SDRAM_BASE +
                        (1 << (col + sdram_params->ch[channel].bw - 1));
                writel(TEST_PATTEN, addr);
                if ((readl(addr) == TEST_PATTEN) &&
                    (readl(CONFIG_SYS_SDRAM_BASE) == 0))
                        break;
        }
        if (col == 8) {
                printf("Col detect error\n");
                ret = -EINVAL;
                goto out;
        } else {
                sdram_params->ch[channel].col = col;
        }

        ddr_rank_2_row15en(dram->grf, 1);
        move_to_config_state(publ, pctl);
        writel(1, &chan->msch->ddrconf);
        move_to_access_state(chan);
        /* Detect row, max 15,min13 in rk3188*/
        for (row = 16; row >= 13; row--) {
                writel(0, CONFIG_SYS_SDRAM_BASE);
                addr = CONFIG_SYS_SDRAM_BASE + (1 << (row + 15 - 1));
                writel(TEST_PATTEN, addr);
                if ((readl(addr) == TEST_PATTEN) &&
                    (readl(CONFIG_SYS_SDRAM_BASE) == 0))
                        break;
        }
        if (row == 12) {
                printf("Row detect error\n");
                ret = -EINVAL;
        } else {
                sdram_params->ch[channel].cs1_row = row;
                sdram_params->ch[channel].row_3_4 = 0;
                debug("chn %d col %d, row %d\n", channel, col, row);
                sdram_params->ch[channel].cs0_row = row;
        }

out:
        return ret;
}

static int sdram_get_niu_config(struct rk3188_sdram_params *sdram_params)
{
        int i, tmp, size, row, ret = 0;

        row = sdram_params->ch[0].cs0_row;
        /*
         * RK3188 share the rank and row bit15, we use same ddr config for 15bit
         * and 16bit row
         */
        if (row == 16)
                row = 15;
        tmp = sdram_params->ch[0].col - 9;
        tmp -= (sdram_params->ch[0].bw == 2) ? 0 : 1;
        tmp |= ((row - 13) << 4);
        size = sizeof(ddrconf_table)/sizeof(ddrconf_table[0]);
        for (i = 0; i < size; i++)
                if (tmp == ddrconf_table[i])
                        break;
        if (i >= size) {
                printf("niu config not found\n");
                ret = -EINVAL;
        } else {
                debug("niu config %d\n", i);
                sdram_params->base.ddrconfig = i;
        }

        return ret;
}

static int sdram_init(struct dram_info *dram,
                      struct rk3188_sdram_params *sdram_params)
{
        int channel;
        int zqcr;
        int ret;

        if ((sdram_params->base.dramtype == DDR3 &&
             sdram_params->base.ddr_freq > 800000000)) {
                printf("SDRAM frequency is too high!");
                return -E2BIG;
        }

        ret = clk_set_rate(&dram->ddr_clk, sdram_params->base.ddr_freq);
        if (ret) {
                printf("Could not set DDR clock\n");
                return ret;
        }

        for (channel = 0; channel < 1; channel++) {
                const struct chan_info *chan = &dram->chan[channel];
                struct rk3288_ddr_pctl *pctl = chan->pctl;
                struct rk3288_ddr_publ *publ = chan->publ;

                phy_pctrl_reset(dram->cru, publ, channel);
                phy_dll_bypass_set(publ, sdram_params->base.ddr_freq);

                dfi_cfg(pctl, sdram_params->base.dramtype);

                pctl_cfg(channel, pctl, sdram_params, dram->grf);

                phy_cfg(chan, channel, sdram_params);

                phy_init(publ);

                writel(POWER_UP_START, &pctl->powctl);
                while (!(readl(&pctl->powstat) & POWER_UP_DONE))
                        ;

                memory_init(publ, sdram_params->base.dramtype);
                move_to_config_state(publ, pctl);

                /* Using 32bit bus width for detect */
                sdram_params->ch[channel].bw = 2;
                set_bandwidth_ratio(chan, channel,
                                    sdram_params->ch[channel].bw, dram->grf);
                /*
                 * set cs, using n=3 for detect
                 * CS0, n=1
                 * CS1, n=2
                 * CS0 & CS1, n = 3
                 */
                sdram_params->ch[channel].rank = 2,
                clrsetbits_le32(&publ->pgcr, 0xF << 18,
                                (sdram_params->ch[channel].rank | 1) << 18);

                /* DS=40ohm,ODT=155ohm */
                zqcr = 1 << ZDEN_SHIFT | 2 << PU_ONDIE_SHIFT |
                        2 << PD_ONDIE_SHIFT | 0x19 << PU_OUTPUT_SHIFT |
                        0x19 << PD_OUTPUT_SHIFT;
                writel(zqcr, &publ->zq1cr[0]);
                writel(zqcr, &publ->zq0cr[0]);

                /* Detect the rank and bit-width with data-training */
                writel(1, &chan->msch->ddrconf);
                sdram_rank_bw_detect(dram, channel, sdram_params);

                if (sdram_params->base.dramtype == LPDDR3) {
                        u32 i;
                        writel(0, &pctl->mrrcfg0);
                        for (i = 0; i < 17; i++)
                                send_command_op(pctl, 1, MRR_CMD, i, 0);
                }
                writel(4, &chan->msch->ddrconf);
                move_to_access_state(chan);
                /* DDR3 and LPDDR3 are always 8 bank, no need detect */
                sdram_params->ch[channel].bk = 3;
                /* Detect Col and Row number*/
                ret = sdram_col_row_detect(dram, channel, sdram_params);
                if (ret)
                        goto error;
        }
        /* Find NIU DDR configuration */
        ret = sdram_get_niu_config(sdram_params);
        if (ret)
                goto error;

        dram_all_config(dram, sdram_params);
        debug("%s done\n", __func__);

        return 0;
error:
        printf("DRAM init failed!\n");
        hang();
}

static int setup_sdram(struct udevice *dev)
{
        struct dram_info *priv = dev_get_priv(dev);
        struct rk3188_sdram_params *params = dev_get_platdata(dev);

        return sdram_init(priv, params);
}

static int rk3188_dmc_ofdata_to_platdata(struct udevice *dev)
{
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
        struct rk3188_sdram_params *params = dev_get_platdata(dev);
        int ret;

        /* rk3188 supports only one-channel */
        params->num_channels = 1;
        ret = dev_read_u32_array(dev, "rockchip,pctl-timing",
                                 (u32 *)&params->pctl_timing,
                                 sizeof(params->pctl_timing) / sizeof(u32));
        if (ret) {
                printf("%s: Cannot read rockchip,pctl-timing\n", __func__);
                return -EINVAL;
        }
        ret = dev_read_u32_array(dev, "rockchip,phy-timing",
                                 (u32 *)&params->phy_timing,
                                 sizeof(params->phy_timing) / sizeof(u32));
        if (ret) {
                printf("%s: Cannot read rockchip,phy-timing\n", __func__);
                return -EINVAL;
        }
        ret = dev_read_u32_array(dev, "rockchip,sdram-params",
                                 (u32 *)&params->base,
                                 sizeof(params->base) / sizeof(u32));
        if (ret) {
                printf("%s: Cannot read rockchip,sdram-params\n", __func__);
                return -EINVAL;
        }
        ret = regmap_init_mem(dev, &params->map);
        if (ret)
                return ret;
#endif

        return 0;
}
#endif /* CONFIG_SPL_BUILD */

#if CONFIG_IS_ENABLED(OF_PLATDATA)
static int conv_of_platdata(struct udevice *dev)
{
        struct rk3188_sdram_params *plat = dev_get_platdata(dev);
        struct dtd_rockchip_rk3188_dmc *of_plat = &plat->of_plat;
        int ret;

        memcpy(&plat->pctl_timing, of_plat->rockchip_pctl_timing,
               sizeof(plat->pctl_timing));
        memcpy(&plat->phy_timing, of_plat->rockchip_phy_timing,
               sizeof(plat->phy_timing));
        memcpy(&plat->base, of_plat->rockchip_sdram_params, sizeof(plat->base));
        /* rk3188 supports dual-channel, set default channel num to 2 */
        plat->num_channels = 1;
        ret = regmap_init_mem_platdata(dev, of_plat->reg,
                                       ARRAY_SIZE(of_plat->reg) / 2,
                                       &plat->map);
        if (ret)
                return ret;

        return 0;
}
#endif

static int rk3188_dmc_probe(struct udevice *dev)
{
#ifdef CONFIG_SPL_BUILD
        struct rk3188_sdram_params *plat = dev_get_platdata(dev);
        struct regmap *map;
        struct udevice *dev_clk;
        int ret;
#endif
        struct dram_info *priv = dev_get_priv(dev);

        priv->pmu = syscon_get_first_range(ROCKCHIP_SYSCON_PMU);

#ifdef CONFIG_SPL_BUILD
#if CONFIG_IS_ENABLED(OF_PLATDATA)
        ret = conv_of_platdata(dev);
        if (ret)
                return ret;
#endif
        map = syscon_get_regmap_by_driver_data(ROCKCHIP_SYSCON_NOC);
        if (IS_ERR(map))
                return PTR_ERR(map);
        priv->chan[0].msch = regmap_get_range(map, 0);

        priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);

        priv->chan[0].pctl = regmap_get_range(plat->map, 0);
        priv->chan[0].publ = regmap_get_range(plat->map, 1);

        ret = rockchip_get_clk(&dev_clk);
        if (ret)
                return ret;
        priv->ddr_clk.id = CLK_DDR;
        ret = clk_request(dev_clk, &priv->ddr_clk);
        if (ret)
                return ret;

        priv->cru = rockchip_get_cru();
        if (IS_ERR(priv->cru))
                return PTR_ERR(priv->cru);
        ret = setup_sdram(dev);
        if (ret)
                return ret;
#else
        priv->info.base = CONFIG_SYS_SDRAM_BASE;
        priv->info.size = rockchip_sdram_size(
                                (phys_addr_t)&priv->pmu->sys_reg[2]);
#endif

        return 0;
}

static int rk3188_dmc_get_info(struct udevice *dev, struct ram_info *info)
{
        struct dram_info *priv = dev_get_priv(dev);

        *info = priv->info;

        return 0;
}

static struct ram_ops rk3188_dmc_ops = {
        .get_info = rk3188_dmc_get_info,
};

static const struct udevice_id rk3188_dmc_ids[] = {
        { .compatible = "rockchip,rk3188-dmc" },
        { }
};

U_BOOT_DRIVER(dmc_rk3188) = {
        .name = "rockchip_rk3188_dmc",
        .id = UCLASS_RAM,
        .of_match = rk3188_dmc_ids,
        .ops = &rk3188_dmc_ops,
#ifdef CONFIG_SPL_BUILD
        .ofdata_to_platdata = rk3188_dmc_ofdata_to_platdata,
#endif
        .probe = rk3188_dmc_probe,
        .priv_auto_alloc_size = sizeof(struct dram_info),
#ifdef CONFIG_SPL_BUILD
        .platdata_auto_alloc_size = sizeof(struct rk3188_sdram_params),
#endif
};