1 files changed, 429 insertions, 10 deletions

diff --git a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
index 5f5914ede8..487e6f423f 100644
--- a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
+++ b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
@@ -1,5 +1,5 @@
 /*
- * DDR3 mem setup file for SMDK5250 board based on EXYNOS5
+ * DDR3 mem setup file for board based on EXYNOS5
  *
  * Copyright (C) 2012 Samsung Electronics
  *
@@ -11,12 +11,14 @@
 #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 RDLVL_COMPLETE_TIMEOUT	10000
+#define TIMEOUT	10000
 
+#ifdef CONFIG_EXYNOS5250
 static void reset_phy_ctrl(void)
 {
 	struct exynos5_clock *clk =
@@ -57,7 +59,8 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 	writel(val, &phy1_ctrl->phy_con42);
 
 	/* ZQ Calibration */
-	if (dmc_config_zq(mem, phy0_ctrl, phy1_ctrl))
+	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 */
@@ -68,7 +71,7 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 		| (mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT),
 		&dmc->concontrol);
 
-	update_reset_dll(dmc, DDR_MODE_DDR3);
+	update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);
 
 	/* DQS Signal */
 	writel(mem->phy0_dqs, &phy0_ctrl->phy_con4);
@@ -93,7 +96,7 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 	writel(val | (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT),
 	       &phy1_ctrl->phy_con12);
 
-	update_reset_dll(dmc, DDR_MODE_DDR3);
+	update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);
 
 	writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT),
 	       &dmc->concontrol);
@@ -124,10 +127,10 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 	writel(mem->timing_power, &dmc->timingpower);
 
 	/* Send PALL command */
-	dmc_config_prech(mem, dmc);
+	dmc_config_prech(mem, &dmc->directcmd);
 
 	/* Send NOP, MRS and ZQINIT commands */
-	dmc_config_mrs(mem, dmc);
+	dmc_config_mrs(mem, &dmc->directcmd);
 
 	if (mem->gate_leveling_enable) {
 		val = PHY_CON0_RESET_VAL;
@@ -174,7 +177,7 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 		writel(val, &phy1_ctrl->phy_con1);
 
 		writel(CTRL_RDLVL_GATE_ENABLE, &dmc->rdlvl_config);
-		i = RDLVL_COMPLETE_TIMEOUT;
+		i = TIMEOUT;
 		while ((readl(&dmc->phystatus) &
 			(RDLVL_COMPLETE_CHO | RDLVL_COMPLETE_CH1)) !=
 			(RDLVL_COMPLETE_CHO | RDLVL_COMPLETE_CH1) && i > 0) {
@@ -202,11 +205,11 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 		writel(val, &phy0_ctrl->phy_con12);
 		writel(val, &phy1_ctrl->phy_con12);
 
-		update_reset_dll(dmc, DDR_MODE_DDR3);
+		update_reset_dll(&dmc->phycontrol0, DDR_MODE_DDR3);
 	}
 
 	/* Send PALL command */
-	dmc_config_prech(mem, dmc);
+	dmc_config_prech(mem, &dmc->directcmd);
 
 	writel(mem->memcontrol, &dmc->memcontrol);
 
@@ -215,3 +218,419 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 		| (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