[PATCH v9 05/16] rockchip: rk3066: add sdram driver

Kever Yang kever.yang at rock-chips.com
Sat Apr 9 05:50:06 CEST 2022


On 2022/4/4 22:19, Johan Jonker wrote:
> From: Paweł Jarosz <paweljarosz3691 at gmail.com>
>
> Add rockchip rk3066 sdram driver
>
> Signed-off-by: Paweł Jarosz <paweljarosz3691 at gmail.com>
> Signed-off-by: Johan Jonker <jbx6244 at gmail.com>

Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
>
> Changed V7:
>    restyle
>    rename TEST_PATTERN
>    changed function prefix
>    changed #if where possible
>    restyle U_BOOT_DRIVER structure
>    remove rk3066_dmc_of_to_plat because dmc DT data
>    only used in TPL in combination with OF_PLATDATA
> ---
>   drivers/ram/rockchip/Makefile       |   1 +
>   drivers/ram/rockchip/sdram_rk3066.c | 892 ++++++++++++++++++++++++++++
>   2 files changed, 893 insertions(+)
>   create mode 100644 drivers/ram/rockchip/sdram_rk3066.c
>
> diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
> index ca1c289b88..6d530c29af 100644
> --- a/drivers/ram/rockchip/Makefile
> +++ b/drivers/ram/rockchip/Makefile
> @@ -5,6 +5,7 @@
>   
>   obj-$(CONFIG_ROCKCHIP_PX30) += sdram_px30.o sdram_pctl_px30.o sdram_phy_px30.o
>   obj-$(CONFIG_ROCKCHIP_RK3368) = dmc-rk3368.o
> +obj-$(CONFIG_ROCKCHIP_RK3066) = sdram_rk3066.o
>   obj-$(CONFIG_ROCKCHIP_RK3128) = sdram_rk3128.o
>   obj-$(CONFIG_ROCKCHIP_RK3188) = sdram_rk3188.o
>   obj-$(CONFIG_ROCKCHIP_RK322X) = sdram_rk322x.o
> diff --git a/drivers/ram/rockchip/sdram_rk3066.c b/drivers/ram/rockchip/sdram_rk3066.c
> new file mode 100644
> index 0000000000..832154ee3a
> --- /dev/null
> +++ b/drivers/ram/rockchip/sdram_rk3066.c
> @@ -0,0 +1,892 @@
> +// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
> +/*
> + * (C) Copyright 2015 Google, Inc
> + * Copyright 2014 Rockchip Inc.
> + *
> + * Adapted from the very similar rk3188 ddr init.
> + */
> +
> +#include <common.h>
> +#include <clk.h>
> +#include <dm.h>
> +#include <dt-structs.h>
> +#include <errno.h>
> +#include <hang.h>
> +#include <init.h>
> +#include <log.h>
> +#include <ram.h>
> +#include <regmap.h>
> +#include <syscon.h>
> +#include <asm/io.h>
> +#include <asm/arch-rockchip/clock.h>
> +#include <asm/arch-rockchip/cru_rk3066.h>
> +#include <asm/arch-rockchip/ddr_rk3188.h>
> +#include <asm/arch-rockchip/grf_rk3066.h>
> +#include <asm/arch-rockchip/hardware.h>
> +#include <asm/arch-rockchip/pmu_rk3188.h>
> +#include <asm/arch-rockchip/sdram_rk3288.h>
> +#include <asm/arch-rockchip/sdram.h>
> +#include <linux/delay.h>
> +#include <linux/err.h>
> +
> +struct rk3066_dmc_chan_info {
> +	struct rk3288_ddr_pctl *pctl;
> +	struct rk3288_ddr_publ *publ;
> +	struct rk3188_msch *msch;
> +};
> +
> +struct rk3066_dmc_dram_info {
> +	struct rk3066_dmc_chan_info chan[1];
> +	struct ram_info info;
> +	struct clk ddr_clk;
> +	struct rk3066_cru *cru;
> +	struct rk3066_grf *grf;
> +	struct rk3066_sgrf *sgrf;
> +	struct rk3188_pmu *pmu;
> +};
> +
> +struct rk3066_dmc_sdram_params {
> +#if CONFIG_IS_ENABLED(OF_PLATDATA)
> +	struct dtd_rockchip_rk3066_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 rk3066_dmc_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_PATTERN			0x5aa5f00f
> +#define DQS_GATE_TRAINING_ERROR_RANK0	BIT(4)
> +#define DQS_GATE_TRAINING_ERROR_RANK1	BIT(5)
> +
> +static void rk3066_dmc_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 rk3066_dmc_ddr_reset(struct rk3066_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 rk3066_dmc_ddr_phy_ctl_reset(struct rk3066_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 rk3066_dmc_phy_pctrl_reset(struct rk3066_cru *cru,
> +				       struct rk3288_ddr_publ *publ,
> +				       int channel)
> +{
> +	int i;
> +
> +	rk3066_dmc_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);
> +	rk3066_dmc_ddr_reset(cru, channel, 1, 0);
> +	udelay(10);
> +	rk3066_dmc_ddr_reset(cru, channel, 0, 0);
> +	udelay(10);
> +}
> +
> +static void rk3066_dmc_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 rk3066_dmc_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);
> +	/* Write ODT length. */
> +	writel(7 << ODT_LEN_BL8_W_SHIFT, &pctl->dfiodtcfg1);
> +	/* Disable phyupd and ctrlupd. */
> +	writel(0, &pctl->dfiupdcfg);
> +}
> +
> +static void rk3066_dmc_ddr_set_ddr3_mode(struct rk3066_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 rk3066_dmc_ddr_rank_2_row15en(struct rk3066_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 rk3066_dmc_pctl_cfg(int channel, struct rk3288_ddr_pctl *pctl,
> +				struct rk3066_dmc_sdram_params *sdram_params,
> +				struct rk3066_grf *grf)
> +{
> +	rk3066_dmc_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);
> +		rk3066_dmc_ddr_set_ddr3_mode(grf, channel, true);
> +		break;
> +	}
> +
> +	setbits_le32(&pctl->scfg, 1);
> +}
> +
> +static void rk3066_dmc_phy_cfg(const struct rk3066_dmc_chan_info *chan, int channel,
> +			       struct rk3066_dmc_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);
> +	/* Set DDR PHY timing. */
> +	rk3066_dmc_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) {
> +		/* Enable dynamic RTT. */
> +		for (i = 0; i < 4; i++)
> +			setbits_le32(&publ->datx8[i].dxgcr, DQSRTT | DQRTT);
> +	} else {
> +		/* Disable dynamic RTT. */
> +		for (i = 0; i < 4; i++)
> +			clrbits_le32(&publ->datx8[i].dxgcr, DQSRTT | DQRTT);
> +	}
> +}
> +
> +static void rk3066_dmc_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 rk3066_dmc_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 rk3066_dmc_send_command_op(struct rk3288_ddr_pctl *pctl,
> +					      u32 rank, u32 cmd, u32 ma, u32 op)
> +{
> +	rk3066_dmc_send_command(pctl, rank, cmd, (ma & LPDDR2_MA_MASK) << LPDDR2_MA_SHIFT |
> +				(op & LPDDR2_OP_MASK) << LPDDR2_OP_SHIFT);
> +}
> +
> +static void rk3066_dmc_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 rk3066_dmc_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 we need to wakeup first
> +			 * and then enter the config.
> +			 */
> +			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 rk3066_dmc_set_bandwidth_ratio(const struct rk3066_dmc_chan_info *chan, int channel,
> +					   u32 n, struct rk3066_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);
> +		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);
> +		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 rk3066_dmc_data_training(const struct rk3066_dmc_chan_info *chan, int channel,
> +				    struct rk3066_dmc_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++)
> +		rk3066_dmc_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 rk3066_dmc_move_to_access_state(const struct rk3066_dmc_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 rk3066_dmc_dram_cfg_rbc(const struct rk3066_dmc_chan_info *chan, u32 chnum,
> +				    struct rk3066_dmc_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 rk3066_dmc_dram_all_config(const struct rk3066_dmc_dram_info *dram,
> +				       struct rk3066_dmc_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);
> +
> +		rk3066_dmc_dram_cfg_rbc(&dram->chan[chan], chan, sdram_params);
> +	}
> +	if (sdram_params->ch[0].rank == 2)
> +		rk3066_dmc_ddr_rank_2_row15en(dram->grf, 0);
> +	else
> +		rk3066_dmc_ddr_rank_2_row15en(dram->grf, 1);
> +
> +	writel(sys_reg, &dram->pmu->sys_reg[2]);
> +}
> +
> +static int rk3066_dmc_sdram_rank_bw_detect(struct rk3066_dmc_dram_info *dram, int channel,
> +					   struct rk3066_dmc_sdram_params *sdram_params)
> +{
> +	int reg;
> +	int need_trainig = 0;
> +	const struct rk3066_dmc_chan_info *chan = &dram->chan[channel];
> +	struct rk3288_ddr_publ *publ = chan->publ;
> +
> +	rk3066_dmc_ddr_rank_2_row15en(dram->grf, 0);
> +
> +	if (rk3066_dmc_data_training(chan, channel, sdram_params) < 0) {
> +		debug("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)) {
> +			debug("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;
> +			rk3066_dmc_set_bandwidth_ratio(chan, channel,
> +						       sdram_params->ch[channel].bw,
> +						       dram->grf);
> +			need_trainig = 1;
> +		}
> +	}
> +	/* Assume that the die bit width is equel to the chip bit width. */
> +	sdram_params->ch[channel].dbw = sdram_params->ch[channel].bw;
> +
> +	if (need_trainig &&
> +	    (rk3066_dmc_data_training(chan, channel, sdram_params) < 0)) {
> +		if (sdram_params->base.dramtype == LPDDR3) {
> +			rk3066_dmc_ddr_phy_ctl_reset(dram->cru, channel, 1);
> +			udelay(10);
> +			rk3066_dmc_ddr_phy_ctl_reset(dram->cru, channel, 0);
> +			udelay(10);
> +		}
> +		debug("2nd data training failed!");
> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static int rk3066_dmc_sdram_col_row_detect(struct rk3066_dmc_dram_info *dram, int channel,
> +					   struct rk3066_dmc_sdram_params *sdram_params)
> +{
> +	int row, col;
> +	unsigned int addr;
> +	const struct rk3066_dmc_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_PATTERN, addr);
> +		if ((readl(addr) == TEST_PATTERN) &&
> +		    (readl(CONFIG_SYS_SDRAM_BASE) == 0))
> +			break;
> +	}
> +	if (col == 8) {
> +		debug("Col detect error\n");
> +		ret = -EINVAL;
> +		goto out;
> +	} else {
> +		sdram_params->ch[channel].col = col;
> +	}
> +
> +	rk3066_dmc_ddr_rank_2_row15en(dram->grf, 1);
> +	rk3066_dmc_move_to_config_state(publ, pctl);
> +	writel(1, &chan->msch->ddrconf);
> +	rk3066_dmc_move_to_access_state(chan);
> +	/* Detect row, max 15, min13 for rk3066 */
> +	for (row = 16; row >= 13; row--) {
> +		writel(0, CONFIG_SYS_SDRAM_BASE);
> +		addr = CONFIG_SYS_SDRAM_BASE + (1 << (row + 15 - 1));
> +		writel(TEST_PATTERN, addr);
> +		if ((readl(addr) == TEST_PATTERN) &&
> +		    (readl(CONFIG_SYS_SDRAM_BASE) == 0))
> +			break;
> +	}
> +	if (row == 12) {
> +		debug("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 rk3066_dmc_sdram_get_niu_config(struct rk3066_dmc_sdram_params *sdram_params)
> +{
> +	int i, tmp, size, ret = 0;
> +
> +	tmp = sdram_params->ch[0].col - 9;
> +	tmp -= (sdram_params->ch[0].bw == 2) ? 0 : 1;
> +	tmp |= ((sdram_params->ch[0].cs0_row - 13) << 4);
> +	size = ARRAY_SIZE(rk3066_dmc_ddrconf_table) / sizeof(rk3066_dmc_ddrconf_table[0]);
> +	for (i = 0; i < size; i++)
> +		if (tmp == rk3066_dmc_ddrconf_table[i])
> +			break;
> +	if (i >= size) {
> +		debug("niu config not found\n");
> +		ret = -EINVAL;
> +	} else {
> +		debug("niu config %d\n", i);
> +		sdram_params->base.ddrconfig = i;
> +	}
> +
> +	return ret;
> +}
> +
> +static int rk3066_dmc_sdram_init(struct rk3066_dmc_dram_info *dram,
> +				 struct rk3066_dmc_sdram_params *sdram_params)
> +{
> +	int channel;
> +	int zqcr;
> +	int ret;
> +
> +	if ((sdram_params->base.dramtype == DDR3 &&
> +	     sdram_params->base.ddr_freq > 800000000)) {
> +		debug("SDRAM frequency is too high!");
> +		return -E2BIG;
> +	}
> +
> +	ret = clk_set_rate(&dram->ddr_clk, sdram_params->base.ddr_freq);
> +	if (ret) {
> +		debug("Could not set DDR clock\n");
> +		return ret;
> +	}
> +
> +	for (channel = 0; channel < 1; channel++) {
> +		const struct rk3066_dmc_chan_info *chan = &dram->chan[channel];
> +		struct rk3288_ddr_pctl *pctl = chan->pctl;
> +		struct rk3288_ddr_publ *publ = chan->publ;
> +
> +		rk3066_dmc_phy_pctrl_reset(dram->cru, publ, channel);
> +		rk3066_dmc_phy_dll_bypass_set(publ, sdram_params->base.ddr_freq);
> +
> +		rk3066_dmc_dfi_cfg(pctl, sdram_params->base.dramtype);
> +
> +		rk3066_dmc_pctl_cfg(channel, pctl, sdram_params, dram->grf);
> +
> +		rk3066_dmc_phy_cfg(chan, channel, sdram_params);
> +
> +		rk3066_dmc_phy_init(publ);
> +
> +		writel(POWER_UP_START, &pctl->powctl);
> +		while (!(readl(&pctl->powstat) & POWER_UP_DONE))
> +			;
> +
> +		rk3066_dmc_memory_init(publ, sdram_params->base.dramtype);
> +		rk3066_dmc_move_to_config_state(publ, pctl);
> +
> +		/* Use 32bit bus width for detection. */
> +		sdram_params->ch[channel].bw = 2;
> +		rk3066_dmc_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);
> +		rk3066_dmc_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++)
> +				rk3066_dmc_send_command_op(pctl, 1, MRR_CMD, i, 0);
> +		}
> +		writel(4, &chan->msch->ddrconf);
> +		rk3066_dmc_move_to_access_state(chan);
> +		/* DDR3 and LPDDR3 are always 8 bank, no need to detect. */
> +		sdram_params->ch[channel].bk = 3;
> +		/* Detect Col and Row number. */
> +		ret = rk3066_dmc_sdram_col_row_detect(dram, channel, sdram_params);
> +		if (ret)
> +			goto error;
> +	}
> +	/* Find NIU DDR configuration. */
> +	ret = rk3066_dmc_sdram_get_niu_config(sdram_params);
> +	if (ret)
> +		goto error;
> +
> +	rk3066_dmc_dram_all_config(dram, sdram_params);
> +	debug("SDRAM init OK!\n");
> +
> +	return 0;
> +error:
> +	debug("SDRAM init failed!\n");
> +	hang();
> +}
> +
> +static int rk3066_dmc_setup_sdram(struct udevice *dev)
> +{
> +	struct rk3066_dmc_dram_info *priv = dev_get_priv(dev);
> +	struct rk3066_dmc_sdram_params *params = dev_get_plat(dev);
> +
> +	return rk3066_dmc_sdram_init(priv, params);
> +}
> +
> +static int rk3066_dmc_conv_of_plat(struct udevice *dev)
> +{
> +#if CONFIG_IS_ENABLED(OF_PLATDATA)
> +	struct rk3066_dmc_sdram_params *plat = dev_get_plat(dev);
> +	struct dtd_rockchip_rk3066_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));
> +	/* RK3066 supports dual-channel, set default channel num to 2. */
> +	plat->num_channels = 1;
> +	ret = regmap_init_mem_plat(dev, of_plat->reg,
> +				   ARRAY_SIZE(of_plat->reg) / 2, &plat->map);
> +	if (ret)
> +		return ret;
> +
> +	return 0;
> +#else
> +	return -EINVAL;
> +#endif
> +}
> +
> +static int rk3066_dmc_probe(struct udevice *dev)
> +{
> +	struct rk3066_dmc_dram_info *priv = dev_get_priv(dev);
> +
> +	priv->pmu = syscon_get_first_range(ROCKCHIP_SYSCON_PMU);
> +
> +	if (IS_ENABLED(CONFIG_TPL_BUILD)) {
> +		struct rk3066_dmc_sdram_params *plat = dev_get_plat(dev);
> +		struct regmap *map;
> +		struct udevice *dev_clk;
> +		int ret;
> +
> +		ret = rk3066_dmc_conv_of_plat(dev);
> +		if (ret)
> +			return ret;
> +
> +		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 = rk3066_dmc_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]);
> +	}
> +
> +	return 0;
> +}
> +
> +static int rk3066_dmc_get_info(struct udevice *dev, struct ram_info *info)
> +{
> +	struct rk3066_dmc_dram_info *priv = dev_get_priv(dev);
> +
> +	*info = priv->info;
> +
> +	return 0;
> +}
> +
> +static struct ram_ops rk3066_dmc_ops = {
> +	.get_info = rk3066_dmc_get_info,
> +};
> +
> +static const struct udevice_id rk3066_dmc_ids[] = {
> +	{ .compatible = "rockchip,rk3066-dmc" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(rockchip_rk3066_dmc) = {
> +	.name		= "rockchip_rk3066_dmc",
> +	.id		= UCLASS_RAM,
> +	.ops		= &rk3066_dmc_ops,
> +	.probe		= rk3066_dmc_probe,
> +	.of_match	= rk3066_dmc_ids,
> +	.priv_auto	= sizeof(struct rk3066_dmc_dram_info),
> +#if IS_ENABLED(CONFIG_TPL_BUILD)
> +	.plat_auto	= sizeof(struct rk3066_dmc_sdram_params),
> +#endif
> +};


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