u-boot-imx/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c - nest-learning-thermostat/5.1.3/u-boot - Git at Google

 /*
  * DDR3 mem setup file for board based on EXYNOS5
  *
  * Copyright (C) 2012 Samsung Electronics
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <config.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/dmc.h>
 #include <asm/arch/power.h>
 #include "common_setup.h"
 #include "exynos5_setup.h"
 #include "clock_init.h"

 #define TIMEOUT	10000

 #ifdef CONFIG_EXYNOS5250
 static void reset_phy_ctrl(void)
 {
 	struct exynos5_clock *clk =
 		(struct exynos5_clock *)samsung_get_base_clock();

 	writel(DDR3PHY_CTRL_PHY_RESET_OFF, &clk->lpddr3phy_ctrl);
 	writel(DDR3PHY_CTRL_PHY_RESET, &clk->lpddr3phy_ctrl);
 }

 int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 		       int reset)
 {
 	unsigned int val;
 	struct exynos5_phy_control *phy0_ctrl, *phy1_ctrl;
 	struct exynos5_dmc *dmc;
 	int i;

 	phy0_ctrl = (struct exynos5_phy_control *)samsung_get_base_dmc_phy();
 	phy1_ctrl = (struct exynos5_phy_control *)(samsung_get_base_dmc_phy()
 							+ DMC_OFFSET);
 	dmc = (struct exynos5_dmc *)samsung_get_base_dmc_ctrl();

 	if (reset)
 		reset_phy_ctrl();

 	/* Set Impedance Output Driver */
 	val = (mem->impedance << CA_CK_DRVR_DS_OFFSET) |
 		(mem->impedance << CA_CKE_DRVR_DS_OFFSET) |
 		(mem->impedance << CA_CS_DRVR_DS_OFFSET) |
 		(mem->impedance << CA_ADR_DRVR_DS_OFFSET);
 	writel(val, &phy0_ctrl->phy_con39);
 	writel(val, &phy1_ctrl->phy_con39);

 	/* Set Read Latency and Burst Length for PHY0 and PHY1 */
 	val = (mem->ctrl_bstlen << PHY_CON42_CTRL_BSTLEN_SHIFT) |
 		(mem->ctrl_rdlat << PHY_CON42_CTRL_RDLAT_SHIFT);
 	writel(val, &phy0_ctrl->phy_con42);
 	writel(val, &phy1_ctrl->phy_con42);

 	/* ZQ Calibration */
 	if (dmc_config_zq(mem, &phy0_ctrl->phy_con16, &phy1_ctrl->phy_con16,
 			  &phy0_ctrl->phy_con17, &phy1_ctrl->phy_con17))
 		return SETUP_ERR_ZQ_CALIBRATION_FAILURE;

 	/* DQ Signal */
 	writel(mem->phy0_pulld_dqs, &phy0_ctrl->phy_con14);
 	writel(mem->phy1_pulld_dqs, &phy1_ctrl->phy_con14);

 	writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)
 		| (mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT),
 		&dmc->concontrol);

 	update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);

 	/* DQS Signal */
 	writel(mem->phy0_dqs, &phy0_ctrl->phy_con4);
 	writel(mem->phy1_dqs, &phy1_ctrl->phy_con4);

 	writel(mem->phy0_dq, &phy0_ctrl->phy_con6);
 	writel(mem->phy1_dq, &phy1_ctrl->phy_con6);

 	writel(mem->phy0_tFS, &phy0_ctrl->phy_con10);
 	writel(mem->phy1_tFS, &phy1_ctrl->phy_con10);

 	val = (mem->ctrl_start_point << PHY_CON12_CTRL_START_POINT_SHIFT) |
 		(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) |
 		(mem->ctrl_dll_on << PHY_CON12_CTRL_DLL_ON_SHIFT) |
 		(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
 	writel(val, &phy0_ctrl->phy_con12);
 	writel(val, &phy1_ctrl->phy_con12);

 	/* Start DLL locking */
 	writel(val | (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT),
 	       &phy0_ctrl->phy_con12);
 	writel(val | (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT),
 	       &phy1_ctrl->phy_con12);

 	update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);

 	writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
 	       &dmc->concontrol);

 	/* Memory Channel Inteleaving Size */
 	writel(mem->iv_size, &dmc->ivcontrol);

 	writel(mem->memconfig, &dmc->memconfig0);
 	writel(mem->memconfig, &dmc->memconfig1);
 	writel(mem->membaseconfig0, &dmc->membaseconfig0);
 	writel(mem->membaseconfig1, &dmc->membaseconfig1);

 	/* Precharge Configuration */
 	writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
 	       &dmc->prechconfig);

 	/* Power Down mode Configuration */
 	writel(mem->dpwrdn_cyc << PWRDNCONFIG_DPWRDN_CYC_SHIFT |
 		mem->dsref_cyc << PWRDNCONFIG_DSREF_CYC_SHIFT,
 		&dmc->pwrdnconfig);

 	/* TimingRow, TimingData, TimingPower and Timingaref
 	 * values as per Memory AC parameters
 	 */
 	writel(mem->timing_ref, &dmc->timingref);
 	writel(mem->timing_row, &dmc->timingrow);
 	writel(mem->timing_data, &dmc->timingdata);
 	writel(mem->timing_power, &dmc->timingpower);

 	/* Send PALL command */
 	dmc_config_prech(mem, &dmc->directcmd);

 	/* Send NOP, MRS and ZQINIT commands */
 	dmc_config_mrs(mem, &dmc->directcmd);

 	if (mem->gate_leveling_enable) {
 		val = PHY_CON0_RESET_VAL;
 		val |= P0_CMD_EN;
 		writel(val, &phy0_ctrl->phy_con0);
 		writel(val, &phy1_ctrl->phy_con0);

 		val = PHY_CON2_RESET_VAL;
 		val |= INIT_DESKEW_EN;
 		writel(val, &phy0_ctrl->phy_con2);
 		writel(val, &phy1_ctrl->phy_con2);

 		val = PHY_CON0_RESET_VAL;
 		val |= P0_CMD_EN;
 		val |= BYTE_RDLVL_EN;
 		writel(val, &phy0_ctrl->phy_con0);
 		writel(val, &phy1_ctrl->phy_con0);

 		val = (mem->ctrl_start_point <<
 				PHY_CON12_CTRL_START_POINT_SHIFT) |
 			(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) |
 			(mem->ctrl_force << PHY_CON12_CTRL_FORCE_SHIFT) |
 			(mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT) |
 			(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
 		writel(val, &phy0_ctrl->phy_con12);
 		writel(val, &phy1_ctrl->phy_con12);

 		val = PHY_CON2_RESET_VAL;
 		val |= INIT_DESKEW_EN;
 		val |= RDLVL_GATE_EN;
 		writel(val, &phy0_ctrl->phy_con2);
 		writel(val, &phy1_ctrl->phy_con2);

 		val = PHY_CON0_RESET_VAL;
 		val |= P0_CMD_EN;
 		val |= BYTE_RDLVL_EN;
 		val |= CTRL_SHGATE;
 		writel(val, &phy0_ctrl->phy_con0);
 		writel(val, &phy1_ctrl->phy_con0);

 		val = PHY_CON1_RESET_VAL;
 		val &= ~(CTRL_GATEDURADJ_MASK);
 		writel(val, &phy0_ctrl->phy_con1);
 		writel(val, &phy1_ctrl->phy_con1);

 		writel(CTRL_RDLVL_GATE_ENABLE, &dmc->rdlvl_config);
 		i = TIMEOUT;
 		while ((readl(&dmc->phystatus) &
 			(RDLVL_COMPLETE_CHO | RDLVL_COMPLETE_CH1)) !=
 			(RDLVL_COMPLETE_CHO | RDLVL_COMPLETE_CH1) && i > 0) {
 			/*
 			 * TODO(waihong): Comment on how long this take to
 			 * timeout
 			 */
 			sdelay(100);
 			i--;
 		}
 		if (!i)
 			return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
 		writel(CTRL_RDLVL_GATE_DISABLE, &dmc->rdlvl_config);

 		writel(0, &phy0_ctrl->phy_con14);
 		writel(0, &phy1_ctrl->phy_con14);

 		val = (mem->ctrl_start_point <<
 				PHY_CON12_CTRL_START_POINT_SHIFT) |
 			(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) |
 			(mem->ctrl_force << PHY_CON12_CTRL_FORCE_SHIFT) |
 			(mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT) |
 			(mem->ctrl_dll_on << PHY_CON12_CTRL_DLL_ON_SHIFT) |
 			(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
 		writel(val, &phy0_ctrl->phy_con12);
 		writel(val, &phy1_ctrl->phy_con12);

 		update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);
 	}

 	/* Send PALL command */
 	dmc_config_prech(mem, &dmc->directcmd);

 	writel(mem->memcontrol, &dmc->memcontrol);

 	/* Set DMC Concontrol and enable auto-refresh counter */
 	writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)
 		| (mem->aref_en << CONCONTROL_AREF_EN_SHIFT), &dmc->concontrol);
 	return 0;
 }
 #endif

 #ifdef CONFIG_EXYNOS5420
 int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 		       int reset)
 {
 	struct exynos5420_clock *clk =
 		(struct exynos5420_clock *)samsung_get_base_clock();
 	struct exynos5420_power *power =
 		(struct exynos5420_power *)samsung_get_base_power();
 	struct exynos5420_phy_control *phy0_ctrl, *phy1_ctrl;
 	struct exynos5420_dmc *drex0, *drex1;
 	struct exynos5420_tzasc *tzasc0, *tzasc1;
 	uint32_t val, n_lock_r, n_lock_w_phy0, n_lock_w_phy1;
 	int chip;
 	int i;

 	phy0_ctrl = (struct exynos5420_phy_control *)samsung_get_base_dmc_phy();
 	phy1_ctrl = (struct exynos5420_phy_control *)(samsung_get_base_dmc_phy()
 							+ DMC_OFFSET);
 	drex0 = (struct exynos5420_dmc *)samsung_get_base_dmc_ctrl();
 	drex1 = (struct exynos5420_dmc *)(samsung_get_base_dmc_ctrl()
 							+ DMC_OFFSET);
 	tzasc0 = (struct exynos5420_tzasc *)samsung_get_base_dmc_tzasc();
 	tzasc1 = (struct exynos5420_tzasc *)(samsung_get_base_dmc_tzasc()
 							+ DMC_OFFSET);

 	/* Enable PAUSE for DREX */
 	setbits_le32(&clk->pause, ENABLE_BIT);

 	/* Enable BYPASS mode */
 	setbits_le32(&clk->bpll_con1, BYPASS_EN);

 	writel(MUX_BPLL_SEL_FOUTBPLL, &clk->src_cdrex);
 	do {
 		val = readl(&clk->mux_stat_cdrex);
 		val &= BPLL_SEL_MASK;
 	} while (val != FOUTBPLL);

 	clrbits_le32(&clk->bpll_con1, BYPASS_EN);

 	/* Specify the DDR memory type as DDR3 */
 	val = readl(&phy0_ctrl->phy_con0);
 	val &= ~(PHY_CON0_CTRL_DDR_MODE_MASK << PHY_CON0_CTRL_DDR_MODE_SHIFT);
 	val |= (DDR_MODE_DDR3 << PHY_CON0_CTRL_DDR_MODE_SHIFT);
 	writel(val, &phy0_ctrl->phy_con0);

 	val = readl(&phy1_ctrl->phy_con0);
 	val &= ~(PHY_CON0_CTRL_DDR_MODE_MASK << PHY_CON0_CTRL_DDR_MODE_SHIFT);
 	val |= (DDR_MODE_DDR3 << PHY_CON0_CTRL_DDR_MODE_SHIFT);
 	writel(val, &phy1_ctrl->phy_con0);

 	/* Set Read Latency and Burst Length for PHY0 and PHY1 */
 	val = (mem->ctrl_bstlen << PHY_CON42_CTRL_BSTLEN_SHIFT) |
 		(mem->ctrl_rdlat << PHY_CON42_CTRL_RDLAT_SHIFT);
 	writel(val, &phy0_ctrl->phy_con42);
 	writel(val, &phy1_ctrl->phy_con42);

 	val = readl(&phy0_ctrl->phy_con26);
 	val &= ~(T_WRDATA_EN_MASK << T_WRDATA_EN_OFFSET);
 	val |= (T_WRDATA_EN_DDR3 << T_WRDATA_EN_OFFSET);
 	writel(val, &phy0_ctrl->phy_con26);

 	val = readl(&phy1_ctrl->phy_con26);
 	val &= ~(T_WRDATA_EN_MASK << T_WRDATA_EN_OFFSET);
 	val |= (T_WRDATA_EN_DDR3 << T_WRDATA_EN_OFFSET);
 	writel(val, &phy1_ctrl->phy_con26);

 	/*
 	 * Set Driver strength for CK, CKE, CS & CA to 0x7
 	 * Set Driver strength for Data Slice 0~3 to 0x7
 	 */
 	val = (0x7 << CA_CK_DRVR_DS_OFFSET) | (0x7 << CA_CKE_DRVR_DS_OFFSET) |
 		(0x7 << CA_CS_DRVR_DS_OFFSET) | (0x7 << CA_ADR_DRVR_DS_OFFSET);
 	val |= (0x7 << DA_3_DS_OFFSET) | (0x7 << DA_2_DS_OFFSET) |
 		(0x7 << DA_1_DS_OFFSET) | (0x7 << DA_0_DS_OFFSET);
 	writel(val, &phy0_ctrl->phy_con39);
 	writel(val, &phy1_ctrl->phy_con39);

 	/* ZQ Calibration */
 	if (dmc_config_zq(mem, &phy0_ctrl->phy_con16, &phy1_ctrl->phy_con16,
 			  &phy0_ctrl->phy_con17, &phy1_ctrl->phy_con17))
 		return SETUP_ERR_ZQ_CALIBRATION_FAILURE;

 	clrbits_le32(&phy0_ctrl->phy_con16, ZQ_CLK_DIV_EN);
 	clrbits_le32(&phy1_ctrl->phy_con16, ZQ_CLK_DIV_EN);

 	/* DQ Signal */
 	val = readl(&phy0_ctrl->phy_con14);
 	val |= mem->phy0_pulld_dqs;
 	writel(val, &phy0_ctrl->phy_con14);
 	val = readl(&phy1_ctrl->phy_con14);
 	val |= mem->phy1_pulld_dqs;
 	writel(val, &phy1_ctrl->phy_con14);

 	val = MEM_TERM_EN | PHY_TERM_EN;
 	writel(val, &drex0->phycontrol0);
 	writel(val, &drex1->phycontrol0);

 	writel(mem->concontrol |
 		(mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT) |
 		(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
 		&drex0->concontrol);
 	writel(mem->concontrol |
 		(mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT) |
 		(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
 		&drex1->concontrol);

 	do {
 		val = readl(&drex0->phystatus);
 	} while ((val & DFI_INIT_COMPLETE) != DFI_INIT_COMPLETE);
 	do {
 		val = readl(&drex1->phystatus);
 	} while ((val & DFI_INIT_COMPLETE) != DFI_INIT_COMPLETE);

 	clrbits_le32(&drex0->concontrol, DFI_INIT_START);
 	clrbits_le32(&drex1->concontrol, DFI_INIT_START);

 	update_reset_dll(&drex0->phycontrol0, DDR_MODE_DDR3);
 	update_reset_dll(&drex1->phycontrol0, DDR_MODE_DDR3);

 	/*
 	 * Set Base Address:
 	 * 0x2000_0000 ~ 0x5FFF_FFFF
 	 * 0x6000_0000 ~ 0x9FFF_FFFF
 	 */
 	/* MEMBASECONFIG0 */
 	val = DMC_MEMBASECONFIGX_CHIP_BASE(DMC_CHIP_BASE_0) |
 		DMC_MEMBASECONFIGX_CHIP_MASK(DMC_CHIP_MASK);
 	writel(val, &tzasc0->membaseconfig0);
 	writel(val, &tzasc1->membaseconfig0);

 	/* MEMBASECONFIG1 */
 	val = DMC_MEMBASECONFIGX_CHIP_BASE(DMC_CHIP_BASE_1) |
 		DMC_MEMBASECONFIGX_CHIP_MASK(DMC_CHIP_MASK);
 	writel(val, &tzasc0->membaseconfig1);
 	writel(val, &tzasc1->membaseconfig1);

 	/*
 	 * Memory Channel Inteleaving Size
 	 * Ares Channel interleaving = 128 bytes
 	 */
 	/* MEMCONFIG0/1 */
 	writel(mem->memconfig, &tzasc0->memconfig0);
 	writel(mem->memconfig, &tzasc1->memconfig0);
 	writel(mem->memconfig, &tzasc0->memconfig1);
 	writel(mem->memconfig, &tzasc1->memconfig1);

 	/* Precharge Configuration */
 	writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
 	       &drex0->prechconfig0);
 	writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
 	       &drex1->prechconfig0);

 	/*
 	 * TimingRow, TimingData, TimingPower and Timingaref
 	 * values as per Memory AC parameters
 	 */
 	writel(mem->timing_ref, &drex0->timingref);
 	writel(mem->timing_ref, &drex1->timingref);
 	writel(mem->timing_row, &drex0->timingrow0);
 	writel(mem->timing_row, &drex1->timingrow0);
 	writel(mem->timing_data, &drex0->timingdata0);
 	writel(mem->timing_data, &drex1->timingdata0);
 	writel(mem->timing_power, &drex0->timingpower0);
 	writel(mem->timing_power, &drex1->timingpower0);

 	if (reset) {
 		/*
 		 * Send NOP, MRS and ZQINIT commands
 		 * Sending MRS command will reset the DRAM. We should not be
 		 * reseting the DRAM after resume, this will lead to memory
 		 * corruption as DRAM content is lost after DRAM reset
 		 */
 		dmc_config_mrs(mem, &drex0->directcmd);
 		dmc_config_mrs(mem, &drex1->directcmd);
 	} else {
 		/*
 		 * During Suspend-Resume & S/W-Reset, as soon as PMU releases
 		 * pad retention, CKE goes high. This causes memory contents
 		 * not to be retained during DRAM initialization. Therfore,
 		 * there is a new control register(0x100431e8[28]) which lets us
 		 * release pad retention and retain the memory content until the
 		 * initialization is complete.
 		 */
 		writel(PAD_RETENTION_DRAM_COREBLK_VAL,
 		       &power->pad_retention_dram_coreblk_option);
 		do {
 			val = readl(&power->pad_retention_dram_status);
 		} while (val != 0x1);

 		/*
 		 * CKE PAD retention disables DRAM self-refresh mode.
 		 * Send auto refresh command for DRAM refresh.
 		 */
 		for (i = 0; i < 128; i++) {
 			for (chip = 0; chip < mem->chips_to_configure; chip++) {
 				writel(DIRECT_CMD_REFA |
 				       (chip << DIRECT_CMD_CHIP_SHIFT),
 				       &drex0->directcmd);
 				writel(DIRECT_CMD_REFA |
 				       (chip << DIRECT_CMD_CHIP_SHIFT),
 				       &drex1->directcmd);
 			}
 		}
 	}

 	if (mem->gate_leveling_enable) {
 		writel(PHY_CON0_RESET_VAL, &phy0_ctrl->phy_con0);
 		writel(PHY_CON0_RESET_VAL, &phy1_ctrl->phy_con0);

 		setbits_le32(&phy0_ctrl->phy_con0, P0_CMD_EN);
 		setbits_le32(&phy1_ctrl->phy_con0, P0_CMD_EN);

 		val = PHY_CON2_RESET_VAL;
 		val |= INIT_DESKEW_EN;
 		writel(val, &phy0_ctrl->phy_con2);
 		writel(val, &phy1_ctrl->phy_con2);

 		val =  readl(&phy0_ctrl->phy_con1);
 		val |= (RDLVL_PASS_ADJ_VAL << RDLVL_PASS_ADJ_OFFSET);
 		writel(val, &phy0_ctrl->phy_con1);

 		val =  readl(&phy1_ctrl->phy_con1);
 		val |= (RDLVL_PASS_ADJ_VAL << RDLVL_PASS_ADJ_OFFSET);
 		writel(val, &phy1_ctrl->phy_con1);

 		n_lock_r = readl(&phy0_ctrl->phy_con13);
 		n_lock_w_phy0 = (n_lock_r & CTRL_LOCK_COARSE_MASK) >> 2;
 		n_lock_r = readl(&phy0_ctrl->phy_con12);
 		n_lock_r &= ~CTRL_DLL_ON;
 		n_lock_r |= n_lock_w_phy0;
 		writel(n_lock_r, &phy0_ctrl->phy_con12);

 		n_lock_r = readl(&phy1_ctrl->phy_con13);
 		n_lock_w_phy1 = (n_lock_r & CTRL_LOCK_COARSE_MASK) >> 2;
 		n_lock_r = readl(&phy1_ctrl->phy_con12);
 		n_lock_r &= ~CTRL_DLL_ON;
 		n_lock_r |= n_lock_w_phy1;
 		writel(n_lock_r, &phy1_ctrl->phy_con12);

 		val = (0x3 << DIRECT_CMD_BANK_SHIFT) | 0x4;
 		for (chip = 0; chip < mem->chips_to_configure; chip++) {
 			writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
 			       &drex0->directcmd);
 			writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
 			       &drex1->directcmd);
 		}

 		setbits_le32(&phy0_ctrl->phy_con2, RDLVL_GATE_EN);
 		setbits_le32(&phy1_ctrl->phy_con2, RDLVL_GATE_EN);

 		setbits_le32(&phy0_ctrl->phy_con0, CTRL_SHGATE);
 		setbits_le32(&phy1_ctrl->phy_con0, CTRL_SHGATE);

 		val = readl(&phy0_ctrl->phy_con1);
 		val &= ~(CTRL_GATEDURADJ_MASK);
 		writel(val, &phy0_ctrl->phy_con1);

 		val = readl(&phy1_ctrl->phy_con1);
 		val &= ~(CTRL_GATEDURADJ_MASK);
 		writel(val, &phy1_ctrl->phy_con1);

 		writel(CTRL_RDLVL_GATE_ENABLE, &drex0->rdlvl_config);
 		i = TIMEOUT;
 		while (((readl(&drex0->phystatus) & RDLVL_COMPLETE_CHO) !=
 			RDLVL_COMPLETE_CHO) && (i > 0)) {
 			/*
 			 * TODO(waihong): Comment on how long this take to
 			 * timeout
 			 */
 			sdelay(100);
 			i--;
 		}
 		if (!i)
 			return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
 		writel(CTRL_RDLVL_GATE_DISABLE, &drex0->rdlvl_config);

 		writel(CTRL_RDLVL_GATE_ENABLE, &drex1->rdlvl_config);
 		i = TIMEOUT;
 		while (((readl(&drex1->phystatus) & RDLVL_COMPLETE_CHO) !=
 			RDLVL_COMPLETE_CHO) && (i > 0)) {
 			/*
 			 * TODO(waihong): Comment on how long this take to
 			 * timeout
 			 */
 			sdelay(100);
 			i--;
 		}
 		if (!i)
 			return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
 		writel(CTRL_RDLVL_GATE_DISABLE, &drex1->rdlvl_config);

 		writel(0, &phy0_ctrl->phy_con14);
 		writel(0, &phy1_ctrl->phy_con14);

 		val = (0x3 << DIRECT_CMD_BANK_SHIFT);
 		for (chip = 0; chip < mem->chips_to_configure; chip++) {
 			writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
 			       &drex0->directcmd);
 			writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
 			       &drex1->directcmd);
 		}

 		if (mem->read_leveling_enable) {
 			/* Set Read DQ Calibration */
 			val = (0x3 << DIRECT_CMD_BANK_SHIFT) | 0x4;
 			for (chip = 0; chip < mem->chips_to_configure; chip++) {
 				writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
 				       &drex0->directcmd);
 				writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
 				       &drex1->directcmd);
 			}

 			val = readl(&phy0_ctrl->phy_con1);
 			val |= READ_LEVELLING_DDR3;
 			writel(val, &phy0_ctrl->phy_con1);
 			val = readl(&phy1_ctrl->phy_con1);
 			val |= READ_LEVELLING_DDR3;
 			writel(val, &phy1_ctrl->phy_con1);

 			val = readl(&phy0_ctrl->phy_con2);
 			val |= (RDLVL_EN | RDLVL_INCR_ADJ);
 			writel(val, &phy0_ctrl->phy_con2);
 			val = readl(&phy1_ctrl->phy_con2);
 			val |= (RDLVL_EN | RDLVL_INCR_ADJ);
 			writel(val, &phy1_ctrl->phy_con2);

 			setbits_le32(&drex0->rdlvl_config,
 				     CTRL_RDLVL_DATA_ENABLE);
 			i = TIMEOUT;
 			while (((readl(&drex0->phystatus) & RDLVL_COMPLETE_CHO)
 				 != RDLVL_COMPLETE_CHO) && (i > 0)) {
 				/*
 				 * TODO(waihong): Comment on how long this take
 				 * to timeout
 				 */
 				sdelay(100);
 				i--;
 			}
 			if (!i)
 				return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;

 			clrbits_le32(&drex0->rdlvl_config,
 				     CTRL_RDLVL_DATA_ENABLE);
 			setbits_le32(&drex1->rdlvl_config,
 				     CTRL_RDLVL_DATA_ENABLE);
 			i = TIMEOUT;
 			while (((readl(&drex1->phystatus) & RDLVL_COMPLETE_CHO)
 				 != RDLVL_COMPLETE_CHO) && (i > 0)) {
 				/*
 				 * TODO(waihong): Comment on how long this take
 				 * to timeout
 				 */
 				sdelay(100);
 				i--;
 			}
 			if (!i)
 				return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;

 			clrbits_le32(&drex1->rdlvl_config,
 				     CTRL_RDLVL_DATA_ENABLE);

 			val = (0x3 << DIRECT_CMD_BANK_SHIFT);
 			for (chip = 0; chip < mem->chips_to_configure; chip++) {
 				writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
 				       &drex0->directcmd);
 				writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
 				       &drex1->directcmd);
 			}

 			update_reset_dll(&drex0->phycontrol0, DDR_MODE_DDR3);
 			update_reset_dll(&drex1->phycontrol0, DDR_MODE_DDR3);
 		}

 		/* Common Settings for Leveling */
 		val = PHY_CON12_RESET_VAL;
 		writel((val + n_lock_w_phy0), &phy0_ctrl->phy_con12);
 		writel((val + n_lock_w_phy1), &phy1_ctrl->phy_con12);

 		setbits_le32(&phy0_ctrl->phy_con2, DLL_DESKEW_EN);
 		setbits_le32(&phy1_ctrl->phy_con2, DLL_DESKEW_EN);
 	}

 	/* Send PALL command */
 	dmc_config_prech(mem, &drex0->directcmd);
 	dmc_config_prech(mem, &drex1->directcmd);

 	writel(mem->memcontrol, &drex0->memcontrol);
 	writel(mem->memcontrol, &drex1->memcontrol);

 	/*
 	 * Set DMC Concontrol: Enable auto-refresh counter, provide
 	 * read data fetch cycles and enable DREX auto set powerdown
 	 * for input buffer of I/O in none read memory state.
 	 */
 	writel(mem->concontrol | (mem->aref_en << CONCONTROL_AREF_EN_SHIFT) |
 		(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)|
 		DMC_CONCONTROL_IO_PD_CON(0x2),
 		&drex0->concontrol);
 	writel(mem->concontrol | (mem->aref_en << CONCONTROL_AREF_EN_SHIFT) |
 		(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)|
 		DMC_CONCONTROL_IO_PD_CON(0x2),
 		&drex1->concontrol);

 	/*
 	 * Enable Clock Gating Control for DMC
 	 * this saves around 25 mw dmc power as compared to the power
 	 * consumption without these bits enabled
 	 */
 	setbits_le32(&drex0->cgcontrol, DMC_INTERNAL_CG);
 	setbits_le32(&drex1->cgcontrol, DMC_INTERNAL_CG);

 	return 0;
 }
 #endif
	/*
	* DDR3 mem setup file for board based on EXYNOS5
	*
	* Copyright (C) 2012 Samsung Electronics
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <config.h>
	#include <asm/io.h>
	#include <asm/arch/clock.h>
	#include <asm/arch/cpu.h>
	#include <asm/arch/dmc.h>
	#include <asm/arch/power.h>
	#include "common_setup.h"
	#include "exynos5_setup.h"
	#include "clock_init.h"

	#define TIMEOUT 10000

	#ifdef CONFIG_EXYNOS5250
	static void reset_phy_ctrl(void)
	{
	struct exynos5_clock *clk =
	(struct exynos5_clock *)samsung_get_base_clock();

	writel(DDR3PHY_CTRL_PHY_RESET_OFF, &clk->lpddr3phy_ctrl);
	writel(DDR3PHY_CTRL_PHY_RESET, &clk->lpddr3phy_ctrl);
	}

	int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
	int reset)
	{
	unsigned int val;
	struct exynos5_phy_control phy0_ctrl, phy1_ctrl;
	struct exynos5_dmc *dmc;
	int i;

	phy0_ctrl = (struct exynos5_phy_control *)samsung_get_base_dmc_phy();
	phy1_ctrl = (struct exynos5_phy_control *)(samsung_get_base_dmc_phy()
	+ DMC_OFFSET);
	dmc = (struct exynos5_dmc *)samsung_get_base_dmc_ctrl();

	if (reset)
	reset_phy_ctrl();

	/* Set Impedance Output Driver */
	val = (mem->impedance << CA_CK_DRVR_DS_OFFSET) \|
	(mem->impedance << CA_CKE_DRVR_DS_OFFSET) \|
	(mem->impedance << CA_CS_DRVR_DS_OFFSET) \|
	(mem->impedance << CA_ADR_DRVR_DS_OFFSET);
	writel(val, &phy0_ctrl->phy_con39);
	writel(val, &phy1_ctrl->phy_con39);

	/* Set Read Latency and Burst Length for PHY0 and PHY1 */
	val = (mem->ctrl_bstlen << PHY_CON42_CTRL_BSTLEN_SHIFT) \|
	(mem->ctrl_rdlat << PHY_CON42_CTRL_RDLAT_SHIFT);
	writel(val, &phy0_ctrl->phy_con42);
	writel(val, &phy1_ctrl->phy_con42);

	/* ZQ Calibration */
	if (dmc_config_zq(mem, &phy0_ctrl->phy_con16, &phy1_ctrl->phy_con16,
	&phy0_ctrl->phy_con17, &phy1_ctrl->phy_con17))
	return SETUP_ERR_ZQ_CALIBRATION_FAILURE;

	/* DQ Signal */
	writel(mem->phy0_pulld_dqs, &phy0_ctrl->phy_con14);
	writel(mem->phy1_pulld_dqs, &phy1_ctrl->phy_con14);

	writel(mem->concontrol \| (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)
	\| (mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT),
	&dmc->concontrol);

	update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);

	/* DQS Signal */
	writel(mem->phy0_dqs, &phy0_ctrl->phy_con4);
	writel(mem->phy1_dqs, &phy1_ctrl->phy_con4);

	writel(mem->phy0_dq, &phy0_ctrl->phy_con6);
	writel(mem->phy1_dq, &phy1_ctrl->phy_con6);

	writel(mem->phy0_tFS, &phy0_ctrl->phy_con10);
	writel(mem->phy1_tFS, &phy1_ctrl->phy_con10);

	val = (mem->ctrl_start_point << PHY_CON12_CTRL_START_POINT_SHIFT) \|
	(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) \|
	(mem->ctrl_dll_on << PHY_CON12_CTRL_DLL_ON_SHIFT) \|
	(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
	writel(val, &phy0_ctrl->phy_con12);
	writel(val, &phy1_ctrl->phy_con12);

	/* Start DLL locking */
	writel(val \| (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT),
	&phy0_ctrl->phy_con12);
	writel(val \| (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT),
	&phy1_ctrl->phy_con12);

	update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);

	writel(mem->concontrol \| (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
	&dmc->concontrol);

	/* Memory Channel Inteleaving Size */
	writel(mem->iv_size, &dmc->ivcontrol);

	writel(mem->memconfig, &dmc->memconfig0);
	writel(mem->memconfig, &dmc->memconfig1);
	writel(mem->membaseconfig0, &dmc->membaseconfig0);
	writel(mem->membaseconfig1, &dmc->membaseconfig1);

	/* Precharge Configuration */
	writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
	&dmc->prechconfig);

	/* Power Down mode Configuration */
	writel(mem->dpwrdn_cyc << PWRDNCONFIG_DPWRDN_CYC_SHIFT \|
	mem->dsref_cyc << PWRDNCONFIG_DSREF_CYC_SHIFT,
	&dmc->pwrdnconfig);

	/* TimingRow, TimingData, TimingPower and Timingaref
	* values as per Memory AC parameters
	*/
	writel(mem->timing_ref, &dmc->timingref);
	writel(mem->timing_row, &dmc->timingrow);
	writel(mem->timing_data, &dmc->timingdata);
	writel(mem->timing_power, &dmc->timingpower);

	/* Send PALL command */
	dmc_config_prech(mem, &dmc->directcmd);

	/* Send NOP, MRS and ZQINIT commands */
	dmc_config_mrs(mem, &dmc->directcmd);

	if (mem->gate_leveling_enable) {
	val = PHY_CON0_RESET_VAL;
	val \|= P0_CMD_EN;
	writel(val, &phy0_ctrl->phy_con0);
	writel(val, &phy1_ctrl->phy_con0);

	val = PHY_CON2_RESET_VAL;
	val \|= INIT_DESKEW_EN;
	writel(val, &phy0_ctrl->phy_con2);
	writel(val, &phy1_ctrl->phy_con2);

	val = PHY_CON0_RESET_VAL;
	val \|= P0_CMD_EN;
	val \|= BYTE_RDLVL_EN;
	writel(val, &phy0_ctrl->phy_con0);
	writel(val, &phy1_ctrl->phy_con0);

	val = (mem->ctrl_start_point <<
	PHY_CON12_CTRL_START_POINT_SHIFT) \|
	(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) \|
	(mem->ctrl_force << PHY_CON12_CTRL_FORCE_SHIFT) \|
	(mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT) \|
	(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
	writel(val, &phy0_ctrl->phy_con12);
	writel(val, &phy1_ctrl->phy_con12);

	val = PHY_CON2_RESET_VAL;
	val \|= INIT_DESKEW_EN;
	val \|= RDLVL_GATE_EN;
	writel(val, &phy0_ctrl->phy_con2);
	writel(val, &phy1_ctrl->phy_con2);

	val = PHY_CON0_RESET_VAL;
	val \|= P0_CMD_EN;
	val \|= BYTE_RDLVL_EN;
	val \|= CTRL_SHGATE;
	writel(val, &phy0_ctrl->phy_con0);
	writel(val, &phy1_ctrl->phy_con0);

	val = PHY_CON1_RESET_VAL;
	val &= ~(CTRL_GATEDURADJ_MASK);
	writel(val, &phy0_ctrl->phy_con1);
	writel(val, &phy1_ctrl->phy_con1);

	writel(CTRL_RDLVL_GATE_ENABLE, &dmc->rdlvl_config);
	i = TIMEOUT;
	while ((readl(&dmc->phystatus) &
	(RDLVL_COMPLETE_CHO \| RDLVL_COMPLETE_CH1)) !=
	(RDLVL_COMPLETE_CHO \| RDLVL_COMPLETE_CH1) && i > 0) {
	/*
	* TODO(waihong): Comment on how long this take to
	* timeout
	*/
	sdelay(100);
	i--;
	}
	if (!i)
	return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
	writel(CTRL_RDLVL_GATE_DISABLE, &dmc->rdlvl_config);

	writel(0, &phy0_ctrl->phy_con14);
	writel(0, &phy1_ctrl->phy_con14);

	val = (mem->ctrl_start_point <<
	PHY_CON12_CTRL_START_POINT_SHIFT) \|
	(mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) \|
	(mem->ctrl_force << PHY_CON12_CTRL_FORCE_SHIFT) \|
	(mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT) \|
	(mem->ctrl_dll_on << PHY_CON12_CTRL_DLL_ON_SHIFT) \|
	(mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT);
	writel(val, &phy0_ctrl->phy_con12);
	writel(val, &phy1_ctrl->phy_con12);

	update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);
	}

	/* Send PALL command */
	dmc_config_prech(mem, &dmc->directcmd);

	writel(mem->memcontrol, &dmc->memcontrol);

	/* Set DMC Concontrol and enable auto-refresh counter */
	writel(mem->concontrol \| (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)
	\| (mem->aref_en << CONCONTROL_AREF_EN_SHIFT), &dmc->concontrol);
	return 0;
	}
	#endif

	#ifdef CONFIG_EXYNOS5420
	int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
	int reset)
	{
	struct exynos5420_clock *clk =
	(struct exynos5420_clock *)samsung_get_base_clock();
	struct exynos5420_power *power =
	(struct exynos5420_power *)samsung_get_base_power();
	struct exynos5420_phy_control phy0_ctrl, phy1_ctrl;
	struct exynos5420_dmc drex0, drex1;
	struct exynos5420_tzasc tzasc0, tzasc1;
	uint32_t val, n_lock_r, n_lock_w_phy0, n_lock_w_phy1;
	int chip;
	int i;

	phy0_ctrl = (struct exynos5420_phy_control *)samsung_get_base_dmc_phy();
	phy1_ctrl = (struct exynos5420_phy_control *)(samsung_get_base_dmc_phy()
	+ DMC_OFFSET);
	drex0 = (struct exynos5420_dmc *)samsung_get_base_dmc_ctrl();
	drex1 = (struct exynos5420_dmc *)(samsung_get_base_dmc_ctrl()
	+ DMC_OFFSET);
	tzasc0 = (struct exynos5420_tzasc *)samsung_get_base_dmc_tzasc();
	tzasc1 = (struct exynos5420_tzasc *)(samsung_get_base_dmc_tzasc()
	+ DMC_OFFSET);

	/* Enable PAUSE for DREX */
	setbits_le32(&clk->pause, ENABLE_BIT);

	/* Enable BYPASS mode */
	setbits_le32(&clk->bpll_con1, BYPASS_EN);

	writel(MUX_BPLL_SEL_FOUTBPLL, &clk->src_cdrex);
	do {
	val = readl(&clk->mux_stat_cdrex);
	val &= BPLL_SEL_MASK;
	} while (val != FOUTBPLL);

	clrbits_le32(&clk->bpll_con1, BYPASS_EN);

	/* Specify the DDR memory type as DDR3 */
	val = readl(&phy0_ctrl->phy_con0);
	val &= ~(PHY_CON0_CTRL_DDR_MODE_MASK << PHY_CON0_CTRL_DDR_MODE_SHIFT);
	val \|= (DDR_MODE_DDR3 << PHY_CON0_CTRL_DDR_MODE_SHIFT);
	writel(val, &phy0_ctrl->phy_con0);

	val = readl(&phy1_ctrl->phy_con0);
	val &= ~(PHY_CON0_CTRL_DDR_MODE_MASK << PHY_CON0_CTRL_DDR_MODE_SHIFT);
	val \|= (DDR_MODE_DDR3 << PHY_CON0_CTRL_DDR_MODE_SHIFT);
	writel(val, &phy1_ctrl->phy_con0);

	/* Set Read Latency and Burst Length for PHY0 and PHY1 */
	val = (mem->ctrl_bstlen << PHY_CON42_CTRL_BSTLEN_SHIFT) \|
	(mem->ctrl_rdlat << PHY_CON42_CTRL_RDLAT_SHIFT);
	writel(val, &phy0_ctrl->phy_con42);
	writel(val, &phy1_ctrl->phy_con42);

	val = readl(&phy0_ctrl->phy_con26);
	val &= ~(T_WRDATA_EN_MASK << T_WRDATA_EN_OFFSET);
	val \|= (T_WRDATA_EN_DDR3 << T_WRDATA_EN_OFFSET);
	writel(val, &phy0_ctrl->phy_con26);

	val = readl(&phy1_ctrl->phy_con26);
	val &= ~(T_WRDATA_EN_MASK << T_WRDATA_EN_OFFSET);
	val \|= (T_WRDATA_EN_DDR3 << T_WRDATA_EN_OFFSET);
	writel(val, &phy1_ctrl->phy_con26);

	/*
	* Set Driver strength for CK, CKE, CS & CA to 0x7
	* Set Driver strength for Data Slice 0~3 to 0x7
	*/
	val = (0x7 << CA_CK_DRVR_DS_OFFSET) \| (0x7 << CA_CKE_DRVR_DS_OFFSET) \|
	(0x7 << CA_CS_DRVR_DS_OFFSET) \| (0x7 << CA_ADR_DRVR_DS_OFFSET);
	val \|= (0x7 << DA_3_DS_OFFSET) \| (0x7 << DA_2_DS_OFFSET) \|
	(0x7 << DA_1_DS_OFFSET) \| (0x7 << DA_0_DS_OFFSET);
	writel(val, &phy0_ctrl->phy_con39);
	writel(val, &phy1_ctrl->phy_con39);

	/* ZQ Calibration */
	if (dmc_config_zq(mem, &phy0_ctrl->phy_con16, &phy1_ctrl->phy_con16,
	&phy0_ctrl->phy_con17, &phy1_ctrl->phy_con17))
	return SETUP_ERR_ZQ_CALIBRATION_FAILURE;

	clrbits_le32(&phy0_ctrl->phy_con16, ZQ_CLK_DIV_EN);
	clrbits_le32(&phy1_ctrl->phy_con16, ZQ_CLK_DIV_EN);

	/* DQ Signal */
	val = readl(&phy0_ctrl->phy_con14);
	val \|= mem->phy0_pulld_dqs;
	writel(val, &phy0_ctrl->phy_con14);
	val = readl(&phy1_ctrl->phy_con14);
	val \|= mem->phy1_pulld_dqs;
	writel(val, &phy1_ctrl->phy_con14);

	val = MEM_TERM_EN \| PHY_TERM_EN;
	writel(val, &drex0->phycontrol0);
	writel(val, &drex1->phycontrol0);

	writel(mem->concontrol \|
	(mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT) \|
	(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
	&drex0->concontrol);
	writel(mem->concontrol \|
	(mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT) \|
	(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
	&drex1->concontrol);

	do {
	val = readl(&drex0->phystatus);
	} while ((val & DFI_INIT_COMPLETE) != DFI_INIT_COMPLETE);
	do {
	val = readl(&drex1->phystatus);
	} while ((val & DFI_INIT_COMPLETE) != DFI_INIT_COMPLETE);

	clrbits_le32(&drex0->concontrol, DFI_INIT_START);
	clrbits_le32(&drex1->concontrol, DFI_INIT_START);

	update_reset_dll(&drex0->phycontrol0, DDR_MODE_DDR3);
	update_reset_dll(&drex1->phycontrol0, DDR_MODE_DDR3);

	/*
	* Set Base Address:
	* 0x2000_0000 ~ 0x5FFF_FFFF
	* 0x6000_0000 ~ 0x9FFF_FFFF
	*/
	/* MEMBASECONFIG0 */
	val = DMC_MEMBASECONFIGX_CHIP_BASE(DMC_CHIP_BASE_0) \|
	DMC_MEMBASECONFIGX_CHIP_MASK(DMC_CHIP_MASK);
	writel(val, &tzasc0->membaseconfig0);
	writel(val, &tzasc1->membaseconfig0);

	/* MEMBASECONFIG1 */
	val = DMC_MEMBASECONFIGX_CHIP_BASE(DMC_CHIP_BASE_1) \|
	DMC_MEMBASECONFIGX_CHIP_MASK(DMC_CHIP_MASK);
	writel(val, &tzasc0->membaseconfig1);
	writel(val, &tzasc1->membaseconfig1);

	/*
	* Memory Channel Inteleaving Size
	* Ares Channel interleaving = 128 bytes
	*/
	/* MEMCONFIG0/1 */
	writel(mem->memconfig, &tzasc0->memconfig0);
	writel(mem->memconfig, &tzasc1->memconfig0);
	writel(mem->memconfig, &tzasc0->memconfig1);
	writel(mem->memconfig, &tzasc1->memconfig1);

	/* Precharge Configuration */
	writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
	&drex0->prechconfig0);
	writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
	&drex1->prechconfig0);

	/*
	* TimingRow, TimingData, TimingPower and Timingaref
	* values as per Memory AC parameters
	*/
	writel(mem->timing_ref, &drex0->timingref);
	writel(mem->timing_ref, &drex1->timingref);
	writel(mem->timing_row, &drex0->timingrow0);
	writel(mem->timing_row, &drex1->timingrow0);
	writel(mem->timing_data, &drex0->timingdata0);
	writel(mem->timing_data, &drex1->timingdata0);
	writel(mem->timing_power, &drex0->timingpower0);
	writel(mem->timing_power, &drex1->timingpower0);

	if (reset) {
	/*
	* Send NOP, MRS and ZQINIT commands
	* Sending MRS command will reset the DRAM. We should not be
	* reseting the DRAM after resume, this will lead to memory
	* corruption as DRAM content is lost after DRAM reset
	*/
	dmc_config_mrs(mem, &drex0->directcmd);
	dmc_config_mrs(mem, &drex1->directcmd);
	} else {
	/*
	* During Suspend-Resume & S/W-Reset, as soon as PMU releases
	* pad retention, CKE goes high. This causes memory contents
	* not to be retained during DRAM initialization. Therfore,
	* there is a new control register(0x100431e8[28]) which lets us
	* release pad retention and retain the memory content until the
	* initialization is complete.
	*/
	writel(PAD_RETENTION_DRAM_COREBLK_VAL,
	&power->pad_retention_dram_coreblk_option);
	do {
	val = readl(&power->pad_retention_dram_status);
	} while (val != 0x1);

	/*
	* CKE PAD retention disables DRAM self-refresh mode.
	* Send auto refresh command for DRAM refresh.
	*/
	for (i = 0; i < 128; i++) {
	for (chip = 0; chip < mem->chips_to_configure; chip++) {
	writel(DIRECT_CMD_REFA \|
	(chip << DIRECT_CMD_CHIP_SHIFT),
	&drex0->directcmd);
	writel(DIRECT_CMD_REFA \|
	(chip << DIRECT_CMD_CHIP_SHIFT),
	&drex1->directcmd);
	}
	}
	}

	if (mem->gate_leveling_enable) {
	writel(PHY_CON0_RESET_VAL, &phy0_ctrl->phy_con0);
	writel(PHY_CON0_RESET_VAL, &phy1_ctrl->phy_con0);

	setbits_le32(&phy0_ctrl->phy_con0, P0_CMD_EN);
	setbits_le32(&phy1_ctrl->phy_con0, P0_CMD_EN);

	val = PHY_CON2_RESET_VAL;
	val \|= INIT_DESKEW_EN;
	writel(val, &phy0_ctrl->phy_con2);
	writel(val, &phy1_ctrl->phy_con2);

	val = readl(&phy0_ctrl->phy_con1);
	val \|= (RDLVL_PASS_ADJ_VAL << RDLVL_PASS_ADJ_OFFSET);
	writel(val, &phy0_ctrl->phy_con1);

	val = readl(&phy1_ctrl->phy_con1);
	val \|= (RDLVL_PASS_ADJ_VAL << RDLVL_PASS_ADJ_OFFSET);
	writel(val, &phy1_ctrl->phy_con1);

	n_lock_r = readl(&phy0_ctrl->phy_con13);
	n_lock_w_phy0 = (n_lock_r & CTRL_LOCK_COARSE_MASK) >> 2;
	n_lock_r = readl(&phy0_ctrl->phy_con12);
	n_lock_r &= ~CTRL_DLL_ON;
	n_lock_r \|= n_lock_w_phy0;
	writel(n_lock_r, &phy0_ctrl->phy_con12);

	n_lock_r = readl(&phy1_ctrl->phy_con13);
	n_lock_w_phy1 = (n_lock_r & CTRL_LOCK_COARSE_MASK) >> 2;
	n_lock_r = readl(&phy1_ctrl->phy_con12);
	n_lock_r &= ~CTRL_DLL_ON;
	n_lock_r \|= n_lock_w_phy1;
	writel(n_lock_r, &phy1_ctrl->phy_con12);

	val = (0x3 << DIRECT_CMD_BANK_SHIFT) \| 0x4;
	for (chip = 0; chip < mem->chips_to_configure; chip++) {
	writel(val \| (chip << DIRECT_CMD_CHIP_SHIFT),
	&drex0->directcmd);
	writel(val \| (chip << DIRECT_CMD_CHIP_SHIFT),
	&drex1->directcmd);
	}

	setbits_le32(&phy0_ctrl->phy_con2, RDLVL_GATE_EN);
	setbits_le32(&phy1_ctrl->phy_con2, RDLVL_GATE_EN);

	setbits_le32(&phy0_ctrl->phy_con0, CTRL_SHGATE);
	setbits_le32(&phy1_ctrl->phy_con0, CTRL_SHGATE);

	val = readl(&phy0_ctrl->phy_con1);
	val &= ~(CTRL_GATEDURADJ_MASK);
	writel(val, &phy0_ctrl->phy_con1);

	val = readl(&phy1_ctrl->phy_con1);
	val &= ~(CTRL_GATEDURADJ_MASK);
	writel(val, &phy1_ctrl->phy_con1);

	writel(CTRL_RDLVL_GATE_ENABLE, &drex0->rdlvl_config);
	i = TIMEOUT;
	while (((readl(&drex0->phystatus) & RDLVL_COMPLETE_CHO) !=
	RDLVL_COMPLETE_CHO) && (i > 0)) {
	/*
	* TODO(waihong): Comment on how long this take to
	* timeout
	*/
	sdelay(100);
	i--;
	}
	if (!i)
	return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
	writel(CTRL_RDLVL_GATE_DISABLE, &drex0->rdlvl_config);

	writel(CTRL_RDLVL_GATE_ENABLE, &drex1->rdlvl_config);
	i = TIMEOUT;
	while (((readl(&drex1->phystatus) & RDLVL_COMPLETE_CHO) !=
	RDLVL_COMPLETE_CHO) && (i > 0)) {
	/*
	* TODO(waihong): Comment on how long this take to
	* timeout
	*/
	sdelay(100);
	i--;
	}
	if (!i)
	return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;
	writel(CTRL_RDLVL_GATE_DISABLE, &drex1->rdlvl_config);

	writel(0, &phy0_ctrl->phy_con14);
	writel(0, &phy1_ctrl->phy_con14);

	val = (0x3 << DIRECT_CMD_BANK_SHIFT);
	for (chip = 0; chip < mem->chips_to_configure; chip++) {
	writel(val \| (chip << DIRECT_CMD_CHIP_SHIFT),
	&drex0->directcmd);
	writel(val \| (chip << DIRECT_CMD_CHIP_SHIFT),
	&drex1->directcmd);
	}

	if (mem->read_leveling_enable) {
	/* Set Read DQ Calibration */
	val = (0x3 << DIRECT_CMD_BANK_SHIFT) \| 0x4;
	for (chip = 0; chip < mem->chips_to_configure; chip++) {
	writel(val \| (chip << DIRECT_CMD_CHIP_SHIFT),
	&drex0->directcmd);
	writel(val \| (chip << DIRECT_CMD_CHIP_SHIFT),
	&drex1->directcmd);
	}

	val = readl(&phy0_ctrl->phy_con1);
	val \|= READ_LEVELLING_DDR3;
	writel(val, &phy0_ctrl->phy_con1);
	val = readl(&phy1_ctrl->phy_con1);
	val \|= READ_LEVELLING_DDR3;
	writel(val, &phy1_ctrl->phy_con1);

	val = readl(&phy0_ctrl->phy_con2);
	val \|= (RDLVL_EN \| RDLVL_INCR_ADJ);
	writel(val, &phy0_ctrl->phy_con2);
	val = readl(&phy1_ctrl->phy_con2);
	val \|= (RDLVL_EN \| RDLVL_INCR_ADJ);
	writel(val, &phy1_ctrl->phy_con2);

	setbits_le32(&drex0->rdlvl_config,
	CTRL_RDLVL_DATA_ENABLE);
	i = TIMEOUT;
	while (((readl(&drex0->phystatus) & RDLVL_COMPLETE_CHO)
	!= RDLVL_COMPLETE_CHO) && (i > 0)) {
	/*
	* TODO(waihong): Comment on how long this take
	* to timeout
	*/
	sdelay(100);
	i--;
	}
	if (!i)
	return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;

	clrbits_le32(&drex0->rdlvl_config,
	CTRL_RDLVL_DATA_ENABLE);
	setbits_le32(&drex1->rdlvl_config,
	CTRL_RDLVL_DATA_ENABLE);
	i = TIMEOUT;
	while (((readl(&drex1->phystatus) & RDLVL_COMPLETE_CHO)
	!= RDLVL_COMPLETE_CHO) && (i > 0)) {
	/*
	* TODO(waihong): Comment on how long this take
	* to timeout
	*/
	sdelay(100);
	i--;
	}
	if (!i)
	return SETUP_ERR_RDLV_COMPLETE_TIMEOUT;

	clrbits_le32(&drex1->rdlvl_config,
	CTRL_RDLVL_DATA_ENABLE);

	val = (0x3 << DIRECT_CMD_BANK_SHIFT);
	for (chip = 0; chip < mem->chips_to_configure; chip++) {
	writel(val \| (chip << DIRECT_CMD_CHIP_SHIFT),
	&drex0->directcmd);
	writel(val \| (chip << DIRECT_CMD_CHIP_SHIFT),
	&drex1->directcmd);
	}

	update_reset_dll(&drex0->phycontrol0, DDR_MODE_DDR3);
	update_reset_dll(&drex1->phycontrol0, DDR_MODE_DDR3);
	}

	/* Common Settings for Leveling */
	val = PHY_CON12_RESET_VAL;
	writel((val + n_lock_w_phy0), &phy0_ctrl->phy_con12);
	writel((val + n_lock_w_phy1), &phy1_ctrl->phy_con12);

	setbits_le32(&phy0_ctrl->phy_con2, DLL_DESKEW_EN);
	setbits_le32(&phy1_ctrl->phy_con2, DLL_DESKEW_EN);
	}

	/* Send PALL command */
	dmc_config_prech(mem, &drex0->directcmd);
	dmc_config_prech(mem, &drex1->directcmd);

	writel(mem->memcontrol, &drex0->memcontrol);
	writel(mem->memcontrol, &drex1->memcontrol);

	/*
	* Set DMC Concontrol: Enable auto-refresh counter, provide
	* read data fetch cycles and enable DREX auto set powerdown
	* for input buffer of I/O in none read memory state.
	*/
	writel(mem->concontrol \| (mem->aref_en << CONCONTROL_AREF_EN_SHIFT) \|
	(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)\|
	DMC_CONCONTROL_IO_PD_CON(0x2),
	&drex0->concontrol);
	writel(mem->concontrol \| (mem->aref_en << CONCONTROL_AREF_EN_SHIFT) \|
	(mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT)\|
	DMC_CONCONTROL_IO_PD_CON(0x2),
	&drex1->concontrol);

	/*
	* Enable Clock Gating Control for DMC
	* this saves around 25 mw dmc power as compared to the power
	* consumption without these bits enabled
	*/
	setbits_le32(&drex0->cgcontrol, DMC_INTERNAL_CG);
	setbits_le32(&drex1->cgcontrol, DMC_INTERNAL_CG);

	return 0;
	}
	#endif