rockchip: rk322x: add sdram driver

Add driver for rk322x to support sdram initialize in SPL.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

2 files changed, 856 insertions, 0 deletions

diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile
index 6c78eff..45b5fe7 100644
--- a/drivers/ram/rockchip/Makefile
+++ b/drivers/ram/rockchip/Makefile
@@ -6,6 +6,7 @@
 
 obj-$(CONFIG_ROCKCHIP_RK3368) = dmc-rk3368.o
 obj-$(CONFIG_ROCKCHIP_RK3188) = sdram_rk3188.o
+obj-$(CONFIG_ROCKCHIP_RK322X) = sdram_rk322x.o
 obj-$(CONFIG_ROCKCHIP_RK3288) = sdram_rk3288.o
 obj-$(CONFIG_ROCKCHIP_RK3328) = sdram_rk3328.o
 obj-$(CONFIG_ROCKCHIP_RK3399) = sdram_rk3399.o
diff --git a/drivers/ram/rockchip/sdram_rk322x.c b/drivers/ram/rockchip/sdram_rk322x.c
new file mode 100644
index 0000000..cc3138b
--- /dev/null
+++ b/drivers/ram/rockchip/sdram_rk322x.c
@@ -0,0 +1,855 @@
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier:     GPL-2.0
+ */
+#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_rk322x.h>
+#include <asm/arch/grf_rk322x.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sdram_rk322x.h>
+#include <asm/arch/timer.h>
+#include <asm/arch/uart.h>
+#include <asm/arch/sdram_common.h>
+#include <asm/types.h>
+#include <linux/err.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+struct chan_info {
+	struct rk322x_ddr_pctl *pctl;
+	struct rk322x_ddr_phy *phy;
+	struct rk322x_service_sys *msch;
+};
+
+struct dram_info {
+	struct chan_info chan[1];
+	struct ram_info info;
+	struct clk ddr_clk;
+	struct rk322x_cru *cru;
+	struct rk322x_grf *grf;
+};
+
+struct rk322x_sdram_params {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+		struct dtd_rockchip_rk3228_dmc of_plat;
+#endif
+		struct rk322x_sdram_channel ch[1];
+		struct rk322x_pctl_timing pctl_timing;
+		struct rk322x_phy_timing phy_timing;
+		struct rk322x_base_params base;
+		int num_channels;
+		struct regmap *map;
+};
+
+#ifdef CONFIG_TPL_BUILD
+/*
+ * [7:6]  bank(n:n bit bank)
+ * [5:4]  row(13+n)
+ * [3]    cs(0:1 cs, 1:2 cs)
+ * [2:1]  bank(n:n bit bank)
+ * [0]    col(10+n)
+ */
+const char ddr_cfg_2_rbc[] = {
+	((0 << 6) | (0 << 4) | (0 << 3) | (1 << 2) | 1),
+	((0 << 6) | (1 << 4) | (0 << 3) | (1 << 2) | 1),
+	((0 << 6) | (2 << 4) | (0 << 3) | (1 << 2) | 1),
+	((0 << 6) | (3 << 4) | (0 << 3) | (1 << 2) | 1),
+	((0 << 6) | (1 << 4) | (0 << 3) | (1 << 2) | 2),
+	((0 << 6) | (2 << 4) | (0 << 3) | (1 << 2) | 2),
+	((0 << 6) | (3 << 4) | (0 << 3) | (1 << 2) | 2),
+	((0 << 6) | (0 << 4) | (0 << 3) | (1 << 2) | 0),
+	((0 << 6) | (1 << 4) | (0 << 3) | (1 << 2) | 0),
+	((0 << 6) | (2 << 4) | (0 << 3) | (1 << 2) | 0),
+	((0 << 6) | (3 << 4) | (0 << 3) | (1 << 2) | 0),
+	((0 << 6) | (2 << 4) | (0 << 3) | (0 << 2) | 1),
+	((1 << 6) | (1 << 4) | (0 << 3) | (0 << 2) | 2),
+	((1 << 6) | (1 << 4) | (0 << 3) | (0 << 2) | 1),
+	((0 << 6) | (3 << 4) | (1 << 3) | (1 << 2) | 1),
+	((0 << 6) | (3 << 4) | (1 << 3) | (1 << 2) | 0),
+};
+
+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++;
+	}
+}
+
+void phy_pctrl_reset(struct rk322x_cru *cru,
+		     struct rk322x_ddr_phy *ddr_phy)
+{
+	rk_clrsetreg(&cru->cru_softrst_con[5], 1 << DDRCTRL_PSRST_SHIFT |
+			1 << DDRCTRL_SRST_SHIFT | 1 << DDRPHY_PSRST_SHIFT |
+			1 << DDRPHY_SRST_SHIFT,
+			1 << DDRCTRL_PSRST_SHIFT | 1 << DDRCTRL_SRST_SHIFT |
+			1 << DDRPHY_PSRST_SHIFT | 1 << DDRPHY_SRST_SHIFT);
+
+	rockchip_udelay(10);
+
+	rk_clrreg(&cru->cru_softrst_con[5], 1 << DDRPHY_PSRST_SHIFT |
+						  1 << DDRPHY_SRST_SHIFT);
+	rockchip_udelay(10);
+
+	rk_clrreg(&cru->cru_softrst_con[5], 1 << DDRCTRL_PSRST_SHIFT |
+						  1 << DDRCTRL_SRST_SHIFT);
+	rockchip_udelay(10);
+
+	clrbits_le32(&ddr_phy->ddrphy_reg[0],
+		     SOFT_RESET_MASK << SOFT_RESET_SHIFT);
+	rockchip_udelay(10);
+	setbits_le32(&ddr_phy->ddrphy_reg[0],
+		     SOFT_DERESET_ANALOG);
+	rockchip_udelay(5);
+	setbits_le32(&ddr_phy->ddrphy_reg[0],
+		     SOFT_DERESET_DIGITAL);
+
+	rockchip_udelay(1);
+}
+
+void phy_dll_bypass_set(struct rk322x_ddr_phy *ddr_phy, u32 freq)
+{
+	u32 tmp;
+
+	setbits_le32(&ddr_phy->ddrphy_reg[0x13], 0x10);
+	setbits_le32(&ddr_phy->ddrphy_reg[0x26], 0x10);
+	setbits_le32(&ddr_phy->ddrphy_reg[0x36], 0x10);
+	setbits_le32(&ddr_phy->ddrphy_reg[0x46], 0x10);
+	setbits_le32(&ddr_phy->ddrphy_reg[0x56], 0x10);
+
+	clrbits_le32(&ddr_phy->ddrphy_reg[0x14], 0x8);
+	clrbits_le32(&ddr_phy->ddrphy_reg[0x27], 0x8);
+	clrbits_le32(&ddr_phy->ddrphy_reg[0x37], 0x8);
+	clrbits_le32(&ddr_phy->ddrphy_reg[0x47], 0x8);
+	clrbits_le32(&ddr_phy->ddrphy_reg[0x57], 0x8);
+
+	if (freq <= 400)
+		setbits_le32(&ddr_phy->ddrphy_reg[0xa4], 0x1f);
+	else
+		clrbits_le32(&ddr_phy->ddrphy_reg[0xa4], 0x1f);
+
+	if (freq <= 680)
+		tmp = 3;
+	else
+		tmp = 2;
+
+	writel(tmp, &ddr_phy->ddrphy_reg[0x28]);
+	writel(tmp, &ddr_phy->ddrphy_reg[0x38]);
+	writel(tmp, &ddr_phy->ddrphy_reg[0x48]);
+	writel(tmp, &ddr_phy->ddrphy_reg[0x58]);
+}
+
+static void send_command(struct rk322x_ddr_pctl *pctl,
+			 u32 rank, u32 cmd, u32 arg)
+{
+	writel((START_CMD | (rank << 20) | arg | cmd), &pctl->mcmd);
+	rockchip_udelay(1);
+	while (readl(&pctl->mcmd) & START_CMD)
+		;
+}
+
+static void memory_init(struct chan_info *chan,
+			struct rk322x_sdram_params *sdram_params)
+{
+	struct rk322x_ddr_pctl *pctl = chan->pctl;
+	u32 dramtype = sdram_params->base.dramtype;
+
+	if (dramtype == DDR3) {
+		send_command(pctl, 3, DESELECT_CMD, 0);
+		rockchip_udelay(1);
+		send_command(pctl, 3, PREA_CMD, 0);
+		send_command(pctl, 3, MRS_CMD,
+			     (0x02 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT |
+			     (sdram_params->phy_timing.mr[2] & CMD_ADDR_MASK) <<
+			     CMD_ADDR_SHIFT);
+
+		send_command(pctl, 3, MRS_CMD,
+			     (0x03 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT |
+			     (sdram_params->phy_timing.mr[3] & CMD_ADDR_MASK) <<
+			     CMD_ADDR_SHIFT);
+
+		send_command(pctl, 3, MRS_CMD,
+			     (0x01 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT |
+			     (sdram_params->phy_timing.mr[1] & CMD_ADDR_MASK) <<
+			     CMD_ADDR_SHIFT);
+
+		send_command(pctl, 3, MRS_CMD,
+			     (0x00 & BANK_ADDR_MASK) << BANK_ADDR_SHIFT |
+			     ((sdram_params->phy_timing.mr[0] |
+			       DDR3_DLL_RESET) &
+			     CMD_ADDR_MASK) << CMD_ADDR_SHIFT);
+
+		send_command(pctl, 3, ZQCL_CMD, 0);
+	} else {
+		send_command(pctl, 3, MRS_CMD,
+			     (0x63 & LPDDR23_MA_MASK) << LPDDR23_MA_SHIFT |
+			     (0 & LPDDR23_OP_MASK) <<
+			     LPDDR23_OP_SHIFT);
+		rockchip_udelay(10);
+		send_command(pctl, 3, MRS_CMD,
+			     (0x10 & LPDDR23_MA_MASK) << LPDDR23_MA_SHIFT |
+			     (0xff & LPDDR23_OP_MASK) <<
+			     LPDDR23_OP_SHIFT);
+		rockchip_udelay(1);
+		send_command(pctl, 3, MRS_CMD,
+			     (0x10 & LPDDR23_MA_MASK) << LPDDR23_MA_SHIFT |
+			     (0xff & LPDDR23_OP_MASK) <<
+			     LPDDR23_OP_SHIFT);
+		rockchip_udelay(1);
+		send_command(pctl, 3, MRS_CMD,
+			     (1 & LPDDR23_MA_MASK) << LPDDR23_MA_SHIFT |
+			     (sdram_params->phy_timing.mr[1] &
+			      LPDDR23_OP_MASK) << LPDDR23_OP_SHIFT);
+		send_command(pctl, 3, MRS_CMD,
+			     (2 & LPDDR23_MA_MASK) << LPDDR23_MA_SHIFT |
+			     (sdram_params->phy_timing.mr[2] &
+			      LPDDR23_OP_MASK) << LPDDR23_OP_SHIFT);
+		send_command(pctl, 3, MRS_CMD,
+			     (3 & LPDDR23_MA_MASK) << LPDDR23_MA_SHIFT |
+			     (sdram_params->phy_timing.mr[3] &
+			      LPDDR23_OP_MASK) << LPDDR23_OP_SHIFT);
+		if (dramtype == LPDDR3)
+			send_command(pctl, 3, MRS_CMD, (11 & LPDDR23_MA_MASK) <<
+				     LPDDR23_MA_SHIFT |
+				     (sdram_params->phy_timing.mr11 &
+				      LPDDR23_OP_MASK) << LPDDR23_OP_SHIFT);
+	}
+}
+
+static u32 data_training(struct chan_info *chan)
+{
+	struct rk322x_ddr_phy *ddr_phy = chan->phy;
+	struct rk322x_ddr_pctl *pctl = chan->pctl;
+	u32 value;
+	u32 bw = (readl(&ddr_phy->ddrphy_reg[0]) >> 4) & 0xf;
+	u32 ret;
+
+	/* disable auto refresh */
+	value = readl(&pctl->trefi) | (1 << 31);
+	writel(1 << 31, &pctl->trefi);
+
+	clrsetbits_le32(&ddr_phy->ddrphy_reg[2], 0x30,
+			DQS_SQU_CAL_SEL_CS0);
+	setbits_le32(&ddr_phy->ddrphy_reg[2], DQS_SQU_CAL_START);
+
+	rockchip_udelay(30);
+	ret = readl(&ddr_phy->ddrphy_reg[0xff]);
+
+	clrbits_le32(&ddr_phy->ddrphy_reg[2],
+		     DQS_SQU_CAL_START);
+
+	/*
+	 * since data training will take about 20us, so send some auto
+	 * refresh(about 7.8us) to complement the lost time
+	 */
+	send_command(pctl, 3, PREA_CMD, 0);
+	send_command(pctl, 3, REF_CMD, 0);
+
+	writel(value, &pctl->trefi);
+
+	if (ret & 0x10) {
+		ret = -1;
+	} else {
+		ret = (ret & 0xf) ^ bw;
+		ret = (ret == 0) ? 0 : -1;
+	}
+	return ret;
+}
+
+static void move_to_config_state(struct rk322x_ddr_pctl *pctl)
+{
+	unsigned int state;
+
+	while (1) {
+		state = readl(&pctl->stat) & PCTL_STAT_MASK;
+		switch (state) {
+		case LOW_POWER:
+			writel(WAKEUP_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MASK)
+				!= ACCESS)
+				;
+			/*
+			 * 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_MASK) != CONFIG)
+				;
+			break;
+		case CONFIG:
+			return;
+		default:
+			break;
+		}
+	}
+}
+
+static void move_to_access_state(struct rk322x_ddr_pctl *pctl)
+{
+	unsigned int state;
+
+	while (1) {
+		state = readl(&pctl->stat) & PCTL_STAT_MASK;
+		switch (state) {
+		case LOW_POWER:
+			writel(WAKEUP_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != ACCESS)
+				;
+			break;
+		case INIT_MEM:
+			writel(CFG_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != CONFIG)
+				;
+			/* fallthrough */
+		case CONFIG:
+			writel(GO_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != ACCESS)
+				;
+			break;
+		case ACCESS:
+			return;
+		default:
+			break;
+		}
+	}
+}
+
+static void move_to_lowpower_state(struct rk322x_ddr_pctl *pctl)
+{
+	unsigned int state;
+
+	while (1) {
+		state = readl(&pctl->stat) & PCTL_STAT_MASK;
+		switch (state) {
+		case INIT_MEM:
+			writel(CFG_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != CONFIG)
+				;
+			/* fallthrough */
+		case CONFIG:
+			writel(GO_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MASK) != ACCESS)
+				;
+			break;
+		case ACCESS:
+			writel(SLEEP_STATE, &pctl->sctl);
+			while ((readl(&pctl->stat) & PCTL_STAT_MASK) !=
+			       LOW_POWER)
+				;
+			break;
+		case LOW_POWER:
+			return;
+		default:
+			break;
+		}
+	}
+}
+
+/* pctl should in low power mode when call this function */
+static void phy_softreset(struct dram_info *dram)
+{
+	struct rk322x_ddr_phy *ddr_phy = dram->chan[0].phy;
+	struct rk322x_grf *grf = dram->grf;
+
+	writel(GRF_DDRPHY_BUFFEREN_CORE_EN, &grf->soc_con[0]);
+	clrbits_le32(&ddr_phy->ddrphy_reg[0], 0x3 << 2);
+	rockchip_udelay(1);
+	setbits_le32(&ddr_phy->ddrphy_reg[0], 1 << 2);
+	rockchip_udelay(5);
+	setbits_le32(&ddr_phy->ddrphy_reg[0], 1 << 3);
+	writel(GRF_DDRPHY_BUFFEREN_CORE_DIS, &grf->soc_con[0]);
+}
+
+/* bw: 2: 32bit, 1:16bit */
+static void set_bw(struct dram_info *dram, u32 bw)
+{
+	struct rk322x_ddr_pctl *pctl = dram->chan[0].pctl;
+	struct rk322x_ddr_phy *ddr_phy = dram->chan[0].phy;
+	struct rk322x_grf *grf = dram->grf;
+
+	if (bw == 1) {
+		setbits_le32(&pctl->ppcfg, 1);
+		clrbits_le32(&ddr_phy->ddrphy_reg[0], 0xc << 4);
+		writel(GRF_MSCH_NOC_16BIT_EN, &grf->soc_con[0]);
+		clrbits_le32(&ddr_phy->ddrphy_reg[0x46], 0x8);
+		clrbits_le32(&ddr_phy->ddrphy_reg[0x56], 0x8);
+	} else {
+		clrbits_le32(&pctl->ppcfg, 1);
+		setbits_le32(&ddr_phy->ddrphy_reg[0], 0xf << 4);
+		writel(GRF_DDR_32BIT_EN | GRF_MSCH_NOC_32BIT_EN,
+		       &grf->soc_con[0]);
+		setbits_le32(&ddr_phy->ddrphy_reg[0x46], 0x8);
+		setbits_le32(&ddr_phy->ddrphy_reg[0x56], 0x8);
+	}
+}
+
+static void pctl_cfg(struct rk322x_ddr_pctl *pctl,
+		     struct rk322x_sdram_params *sdram_params,
+		     struct rk322x_grf *grf)
+{
+	u32 burst_len;
+	u32 bw;
+	u32 dramtype = sdram_params->base.dramtype;
+
+	if (sdram_params->ch[0].bw == 2)
+		bw = GRF_DDR_32BIT_EN | GRF_MSCH_NOC_32BIT_EN;
+	else
+		bw = GRF_MSCH_NOC_16BIT_EN;
+
+	writel(DFI_INIT_START | DFI_DATA_BYTE_DISABLE_EN, &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(0x51010, &pctl->dfilpcfg0);
+
+	writel(1, &pctl->dfitphyupdtype0);
+	writel(0x0d, &pctl->dfitphyrdlat);
+	writel(0, &pctl->dfitphywrdata);
+
+	writel(0, &pctl->dfiupdcfg);
+	copy_to_reg(&pctl->togcnt1u, &sdram_params->pctl_timing.togcnt1u,
+		    sizeof(struct rk322x_pctl_timing));
+	if (dramtype == DDR3) {
+		writel((1 << 3) | (1 << 11),
+		       &pctl->dfiodtcfg);
+		writel(7 << 16, &pctl->dfiodtcfg1);
+		writel((readl(&pctl->tcl) - 1) / 2 - 1, &pctl->dfitrddataen);
+		writel((readl(&pctl->tcwl) - 1) / 2 - 1, &pctl->dfitphywrlat);
+		writel(500, &pctl->trsth);
+		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);
+		writel(bw | GRF_DDR3_EN, &grf->soc_con[0]);
+	} else {
+		if (sdram_params->phy_timing.bl & PHT_BL_8)
+			burst_len = MDDR_LPDDR2_BL_8;
+		else
+			burst_len = MDDR_LPDDR2_BL_4;
+
+		writel(readl(&pctl->tcl) / 2 - 1, &pctl->dfitrddataen);
+		writel(readl(&pctl->tcwl) / 2 - 1, &pctl->dfitphywrlat);
+		writel(0, &pctl->trsth);
+		if (dramtype == LPDDR2) {
+			writel(0 << MDDR_LPDDR2_CLK_STOP_IDLE_SHIFT |
+			       LPDDR2_S4 | LPDDR2_EN | burst_len |
+			       (6 - 4) << TFAW_SHIFT | PD_EXIT_FAST |
+			       1 << PD_TYPE_SHIFT | 0 << PD_IDLE_SHIFT,
+			       &pctl->mcfg);
+			writel(0, &pctl->dfiodtcfg);
+			writel(0, &pctl->dfiodtcfg1);
+		} else {
+			writel(0 << MDDR_LPDDR2_CLK_STOP_IDLE_SHIFT |
+			       LPDDR2_S4 | LPDDR3_EN | burst_len |
+			       (6 - 4) << TFAW_SHIFT | PD_EXIT_FAST |
+			       1 << PD_TYPE_SHIFT | 0 << PD_IDLE_SHIFT,
+			       &pctl->mcfg);
+			writel((1 << 3) | (1 << 2), &pctl->dfiodtcfg);
+			writel((7 << 16) | 4, &pctl->dfiodtcfg1);
+		}
+		writel(bw | GRF_LPDDR2_3_EN, &grf->soc_con[0]);
+	}
+	setbits_le32(&pctl->scfg, 1);
+}
+
+static void phy_cfg(struct chan_info *chan,
+		    struct rk322x_sdram_params *sdram_params)
+{
+	struct rk322x_ddr_phy *ddr_phy = chan->phy;
+	struct rk322x_service_sys *axi_bus = chan->msch;
+	struct rk322x_msch_timings *noc_timing = &sdram_params->base.noc_timing;
+	struct rk322x_phy_timing *phy_timing = &sdram_params->phy_timing;
+	struct rk322x_pctl_timing *pctl_timing = &sdram_params->pctl_timing;
+	u32 cmd_drv, clk_drv, dqs_drv, dqs_odt;
+
+	writel(noc_timing->ddrtiming, &axi_bus->ddrtiming);
+	writel(noc_timing->ddrmode, &axi_bus->ddrmode);
+	writel(noc_timing->readlatency, &axi_bus->readlatency);
+	writel(noc_timing->activate, &axi_bus->activate);
+	writel(noc_timing->devtodev, &axi_bus->devtodev);
+
+	switch (sdram_params->base.dramtype) {
+	case DDR3:
+		writel(PHY_DDR3 | phy_timing->bl, &ddr_phy->ddrphy_reg[1]);
+		break;
+	case LPDDR2:
+		writel(PHY_LPDDR2 | phy_timing->bl, &ddr_phy->ddrphy_reg[1]);
+		break;
+	default:
+		writel(PHY_LPDDR2 | phy_timing->bl, &ddr_phy->ddrphy_reg[1]);
+		break;
+	}
+
+	writel(phy_timing->cl_al, &ddr_phy->ddrphy_reg[0xb]);
+	writel(pctl_timing->tcwl, &ddr_phy->ddrphy_reg[0xc]);
+
+	cmd_drv = PHY_RON_RTT_34OHM;
+	clk_drv = PHY_RON_RTT_45OHM;
+	dqs_drv = PHY_RON_RTT_34OHM;
+	if (sdram_params->base.dramtype == LPDDR2)
+		dqs_odt = PHY_RON_RTT_DISABLE;
+	else
+		dqs_odt = PHY_RON_RTT_225OHM;
+
+	writel(cmd_drv, &ddr_phy->ddrphy_reg[0x11]);
+	clrsetbits_le32(&ddr_phy->ddrphy_reg[0x12], (0x1f << 3), cmd_drv << 3);
+	writel(clk_drv, &ddr_phy->ddrphy_reg[0x16]);
+	writel(clk_drv, &ddr_phy->ddrphy_reg[0x18]);
+
+	writel(dqs_drv, &ddr_phy->ddrphy_reg[0x20]);
+	writel(dqs_drv, &ddr_phy->ddrphy_reg[0x2f]);
+	writel(dqs_drv, &ddr_phy->ddrphy_reg[0x30]);
+	writel(dqs_drv, &ddr_phy->ddrphy_reg[0x3f]);
+	writel(dqs_drv, &ddr_phy->ddrphy_reg[0x40]);
+	writel(dqs_drv, &ddr_phy->ddrphy_reg[0x4f]);
+	writel(dqs_drv, &ddr_phy->ddrphy_reg[0x50]);
+	writel(dqs_drv, &ddr_phy->ddrphy_reg[0x5f]);
+
+	writel(dqs_odt, &ddr_phy->ddrphy_reg[0x21]);
+	writel(dqs_odt, &ddr_phy->ddrphy_reg[0x2e]);
+	writel(dqs_odt, &ddr_phy->ddrphy_reg[0x31]);
+	writel(dqs_odt, &ddr_phy->ddrphy_reg[0x3e]);
+	writel(dqs_odt, &ddr_phy->ddrphy_reg[0x41]);
+	writel(dqs_odt, &ddr_phy->ddrphy_reg[0x4e]);
+	writel(dqs_odt, &ddr_phy->ddrphy_reg[0x51]);
+	writel(dqs_odt, &ddr_phy->ddrphy_reg[0x5e]);
+}
+
+void dram_cfg_rbc(struct chan_info *chan,
+		  struct rk322x_sdram_params *sdram_params)
+{
+	char noc_config;
+	int i = 0;
+	struct rk322x_sdram_channel *config = &sdram_params->ch[0];
+	struct rk322x_service_sys *axi_bus = chan->msch;
+
+	move_to_config_state(chan->pctl);
+
+	if ((config->rank == 2) && (config->cs1_row == config->cs0_row)) {
+		if ((config->col + config->bw) == 12) {
+			i = 14;
+			goto finish;
+		} else if ((config->col + config->bw) == 11) {
+			i = 15;
+			goto finish;
+		}
+	}
+	noc_config = ((config->cs0_row - 13) << 4) | ((config->bk - 2) << 2) |
+				(config->col + config->bw - 11);
+	for (i = 0; i < 11; i++) {
+		if (noc_config == ddr_cfg_2_rbc[i])
+			break;
+	}
+
+	if (i < 11)
+		goto finish;
+
+	noc_config = ((config->bk - 2) << 6) | ((config->cs0_row - 13) << 4) |
+				(config->col + config->bw - 11);
+
+	for (i = 11; i < 14; i++) {
+		if (noc_config == ddr_cfg_2_rbc[i])
+			break;
+	}
+	if (i < 14)
+		goto finish;
+	else
+		i = 0;
+
+finish:
+	writel(i, &axi_bus->ddrconf);
+	move_to_access_state(chan->pctl);
+}
+
+static void dram_all_config(const struct dram_info *dram,
+			    struct rk322x_sdram_params *sdram_params)
+{
+	struct rk322x_sdram_channel *info = &sdram_params->ch[0];
+	u32 sys_reg = 0;
+
+	sys_reg |= sdram_params->base.dramtype << SYS_REG_DDRTYPE_SHIFT;
+	sys_reg |= (1 - 1) << SYS_REG_NUM_CH_SHIFT;
+	sys_reg |= info->row_3_4 << SYS_REG_ROW_3_4_SHIFT(0);
+	sys_reg |= 1 << SYS_REG_CHINFO_SHIFT(0);
+	sys_reg |= (info->rank - 1) << SYS_REG_RANK_SHIFT(0);
+	sys_reg |= (info->col - 9) << SYS_REG_COL_SHIFT(0);
+	sys_reg |= info->bk == 3 ? 0 : 1 << SYS_REG_BK_SHIFT(0);
+	sys_reg |= (info->cs0_row - 13) << SYS_REG_CS0_ROW_SHIFT(0);
+	sys_reg |= (info->cs1_row - 13) << SYS_REG_CS1_ROW_SHIFT(0);
+	sys_reg |= (2 >> info->bw) << SYS_REG_BW_SHIFT(0);
+	sys_reg |= (2 >> info->dbw) << SYS_REG_DBW_SHIFT(0);
+
+	writel(sys_reg, &dram->grf->os_reg[2]);
+}
+
+#define TEST_PATTEN	0x5aa5f00f
+
+static int dram_cap_detect(struct dram_info *dram,
+			   struct rk322x_sdram_params *sdram_params)
+{
+	u32 bw, row, col, addr;
+	u32 ret = 0;
+	struct rk322x_service_sys *axi_bus = dram->chan[0].msch;
+
+	if (sdram_params->base.dramtype == DDR3)
+		sdram_params->ch[0].dbw = 1;
+	else
+		sdram_params->ch[0].dbw = 2;
+
+	move_to_config_state(dram->chan[0].pctl);
+	/* bw detect */
+	set_bw(dram, 2);
+	if (data_training(&dram->chan[0]) == 0) {
+		bw = 2;
+	} else {
+		bw = 1;
+		set_bw(dram, 1);
+		move_to_lowpower_state(dram->chan[0].pctl);
+		phy_softreset(dram);
+		move_to_config_state(dram->chan[0].pctl);
+		if (data_training(&dram->chan[0])) {
+			printf("BW detect error\n");
+			ret = -EINVAL;
+		}
+	}
+	sdram_params->ch[0].bw = bw;
+	sdram_params->ch[0].bk = 3;
+
+	if (bw == 2)
+		writel(6, &axi_bus->ddrconf);
+	else
+		writel(3, &axi_bus->ddrconf);
+	move_to_access_state(dram->chan[0].pctl);
+	for (col = 11; col >= 9; col--) {
+		writel(0, CONFIG_SYS_SDRAM_BASE);
+		addr = CONFIG_SYS_SDRAM_BASE +
+			(1 << (col + 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[0].col = col;
+	}
+
+	writel(10, &axi_bus->ddrconf);
+
+	/* Detect row*/
+	for (row = 16; row >= 12; row--) {
+		writel(0, CONFIG_SYS_SDRAM_BASE);
+		addr = CONFIG_SYS_SDRAM_BASE + (1u << (row + 11 + 3 - 1));
+		writel(TEST_PATTEN, addr);
+		if ((readl(addr) == TEST_PATTEN) &&
+		    (readl(CONFIG_SYS_SDRAM_BASE) == 0))
+			break;
+	}
+	if (row == 11) {
+		printf("Row detect error\n");
+		ret = -EINVAL;
+	} else {
+		sdram_params->ch[0].cs1_row = row;
+		sdram_params->ch[0].row_3_4 = 0;
+		sdram_params->ch[0].cs0_row = row;
+	}
+	/* cs detect */
+	writel(0, CONFIG_SYS_SDRAM_BASE);
+	writel(TEST_PATTEN, CONFIG_SYS_SDRAM_BASE + (1u << 30));
+	writel(~TEST_PATTEN, CONFIG_SYS_SDRAM_BASE + (1u << 30) + 4);
+	if ((readl(CONFIG_SYS_SDRAM_BASE + (1u << 30)) == TEST_PATTEN) &&
+	    (readl(CONFIG_SYS_SDRAM_BASE) == 0))
+		sdram_params->ch[0].rank = 2;
+	else
+		sdram_params->ch[0].rank = 1;
+out:
+	return ret;
+}
+
+static int sdram_init(struct dram_info *dram,
+		      struct rk322x_sdram_params *sdram_params)
+{
+	int ret;
+
+	ret = clk_set_rate(&dram->ddr_clk,
+			   sdram_params->base.ddr_freq * MHz * 2);
+	if (ret < 0) {
+		printf("Could not set DDR clock\n");
+		return ret;
+	}
+
+	phy_pctrl_reset(dram->cru, dram->chan[0].phy);
+	phy_dll_bypass_set(dram->chan[0].phy, sdram_params->base.ddr_freq);
+	pctl_cfg(dram->chan[0].pctl, sdram_params, dram->grf);
+	phy_cfg(&dram->chan[0], sdram_params);
+	writel(POWER_UP_START, &dram->chan[0].pctl->powctl);
+	while (!(readl(&dram->chan[0].pctl->powstat) & POWER_UP_DONE))
+		;
+	memory_init(&dram->chan[0], sdram_params);
+	move_to_access_state(dram->chan[0].pctl);
+	ret = dram_cap_detect(dram, sdram_params);
+	if (ret)
+		goto out;
+	dram_cfg_rbc(&dram->chan[0], sdram_params);
+	dram_all_config(dram, sdram_params);
+out:
+	return ret;
+}
+
+static int rk322x_dmc_ofdata_to_platdata(struct udevice *dev)
+{
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct rk322x_sdram_params *params = dev_get_platdata(dev);
+	const void *blob = gd->fdt_blob;
+	int node = dev_of_offset(dev);
+	int ret;
+
+	params->num_channels = 1;
+
+	ret = fdtdec_get_int_array(blob, node, "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 = fdtdec_get_int_array(blob, node, "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 = fdtdec_get_int_array(blob, node, "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_TPL_BUILD */
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+static int conv_of_platdata(struct udevice *dev)
+{
+	struct rk322x_sdram_params *plat = dev_get_platdata(dev);
+	struct dtd_rockchip_rk322x_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));
+
+	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 rk322x_dmc_probe(struct udevice *dev)
+{
+#ifdef CONFIG_TPL_BUILD
+	struct rk322x_sdram_params *plat = dev_get_platdata(dev);
+	int ret;
+	struct udevice *dev_clk;
+#endif
+	struct dram_info *priv = dev_get_priv(dev);
+
+	priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+#ifdef CONFIG_TPL_BUILD
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	ret = conv_of_platdata(dev);
+	if (ret)
+		return ret;
+#endif
+
+	priv->chan[0].msch = syscon_get_first_range(ROCKCHIP_SYSCON_MSCH);
+	priv->chan[0].pctl = regmap_get_range(plat->map, 0);
+	priv->chan[0].phy = 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 = sdram_init(priv, plat);
+	if (ret)
+		return ret;
+#else
+	priv->info.base = CONFIG_SYS_SDRAM_BASE;
+	priv->info.size = rockchip_sdram_size(
+			(phys_addr_t)&priv->grf->os_reg[2]);
+#endif
+
+	return 0;
+}
+
+static int rk322x_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 rk322x_dmc_ops = {
+	.get_info = rk322x_dmc_get_info,
+};
+
+static const struct udevice_id rk322x_dmc_ids[] = {
+	{ .compatible = "rockchip,rk3228-dmc" },
+	{ }
+};
+
+U_BOOT_DRIVER(dmc_rk322x) = {
+	.name = "rockchip_rk322x_dmc",
+	.id = UCLASS_RAM,
+	.of_match = rk322x_dmc_ids,
+	.ops = &rk322x_dmc_ops,
+#ifdef CONFIG_TPL_BUILD
+	.ofdata_to_platdata = rk322x_dmc_ofdata_to_platdata,
+#endif
+	.probe = rk322x_dmc_probe,
+	.priv_auto_alloc_size = sizeof(struct dram_info),
+#ifdef CONFIG_TPL_BUILD
+	.platdata_auto_alloc_size = sizeof(struct rk322x_sdram_params),
+#endif
+};
+