Patchwork [U-Boot,04/10,V2] Exynos5420: Add DDR3 initialization for 5420

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Submitter Rajeshwari Birje
Date Sept. 2, 2013, 1:11 p.m.
Message ID <1378127507-17671-5-git-send-email-rajeshwari.s@samsung.com>
Download mbox | patch
Permalink /patch/271927/
State Changes Requested
Delegated to: Minkyu Kang
Headers show

Comments

Rajeshwari Birje - Sept. 2, 2013, 1:11 p.m.
This patch intends to add DDR3 initialization code for Exynos5420.

Signed-off-by: Rajeshwari S Shinde <rajeshwari.s@samsung.com>
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
---
Changes in V2:
	Corrected a compilation issue for SMDK5250.
 arch/arm/cpu/armv7/exynos/dmc_common.c    |   8 -
 arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c | 413 +++++++++++++++++++++++++++++-
 arch/arm/include/asm/arch-exynos/cpu.h    |   4 +
 arch/arm/include/asm/arch-exynos/dmc.h    | 121 ++++++---
 4 files changed, 503 insertions(+), 43 deletions(-)

Patch

diff --git a/arch/arm/cpu/armv7/exynos/dmc_common.c b/arch/arm/cpu/armv7/exynos/dmc_common.c
index 53cfe6e..882cd1e 100644
--- a/arch/arm/cpu/armv7/exynos/dmc_common.c
+++ b/arch/arm/cpu/armv7/exynos/dmc_common.c
@@ -152,14 +152,6 @@  void dmc_config_prech(struct mem_timings *mem, struct exynos5_dmc *dmc)
 	}
 }
 
-void dmc_config_memory(struct mem_timings *mem, struct exynos5_dmc *dmc)
-{
-	writel(mem->memconfig, &dmc->memconfig0);
-	writel(mem->memconfig, &dmc->memconfig1);
-	writel(DMC_MEMBASECONFIG0_VAL, &dmc->membaseconfig0);
-	writel(DMC_MEMBASECONFIG1_VAL, &dmc->membaseconfig1);
-}
-
 void mem_ctrl_init(int reset)
 {
 	struct spl_machine_param *param = spl_get_machine_params();
diff --git a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
index 5f5914e..0ca5350 100644
--- a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
+++ b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
@@ -15,8 +15,9 @@ 
 #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 =
@@ -108,7 +109,7 @@  int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size,
 
 	/* Precharge Configuration */
 	writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT,
-	       &dmc->prechconfig);
+	       &dmc->prechconfig0);
 
 	/* Power Down mode Configuration */
 	writel(mem->dpwrdn_cyc << PWRDNCONFIG_DPWRDN_CYC_SHIFT |
@@ -174,7 +175,7 @@  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) {
@@ -215,3 +216,409 @@  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 *)EXYNOS5_CLOCK_BASE;
+	struct exynos5_phy_control *phy0_ctrl, *phy1_ctrl;
+	struct exynos5_dmc *drex0, *drex1;
+	struct exynos5_tzasc *tzasc0, *tzasc1;
+	uint32_t val, n_lock_r, n_lock_w_phy0, n_lock_w_phy1;
+	int chip;
+	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);
+	drex0 = (struct exynos5_dmc *)samsung_get_base_dmc_ctrl();
+	drex1 = (struct exynos5_dmc *)(samsung_get_base_dmc_ctrl()
+							+ DMC_OFFSET);
+	tzasc0 = (struct exynos5_tzasc *)EXYNOS5420_DMC_TZASC0_BASE;
+	tzasc1 = (struct exynos5_tzasc *)EXYNOS5420_DMC_TZASC1_BASE;
+
+	/* 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, phy1_ctrl))
+		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, DDR_MODE_DDR3);
+	update_reset_dll(drex1, 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->timingrow);
+	writel(mem->timing_row, &drex1->timingrow);
+	writel(mem->timing_data, &drex0->timingdata);
+	writel(mem->timing_data, &drex1->timingdata);
+	writel(mem->timing_power, &drex0->timingpower);
+	writel(mem->timing_power, &drex1->timingpower);
+
+	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);
+		dmc_config_mrs(mem, drex1);
+	} 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,
+		       PAD_RETENTION_DRAM_COREBLK_OPTION);
+		do {
+			val = readl(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, DDR_MODE_DDR3);
+			update_reset_dll(drex1, 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);
+	dmc_config_prech(mem, drex1);
+
+	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
diff --git a/arch/arm/include/asm/arch-exynos/cpu.h b/arch/arm/include/asm/arch-exynos/cpu.h
index e988251..a110240 100644
--- a/arch/arm/include/asm/arch-exynos/cpu.h
+++ b/arch/arm/include/asm/arch-exynos/cpu.h
@@ -160,6 +160,10 @@ 
 #define EXYNOS5420_MODEM_BASE		DEVICE_NOT_AVAILABLE
 #define EXYNOS5420_TZPC_BASE		DEVICE_NOT_AVAILABLE
 
+#define PAD_RETENTION_DRAM_STATUS	(EXYNOS5420_POWER_BASE + 0x3004)
+#define PAD_RETENTION_DRAM_COREBLK_OPTION	(EXYNOS5420_POWER_BASE + 0x31E8)
+#define PAD_RETENTION_DRAM_COREBLK_VAL	0x10000000
+
 #ifndef __ASSEMBLY__
 #include <asm/io.h>
 /* CPU detection macros */
diff --git a/arch/arm/include/asm/arch-exynos/dmc.h b/arch/arm/include/asm/arch-exynos/dmc.h
index f65c676..b947de1 100644
--- a/arch/arm/include/asm/arch-exynos/dmc.h
+++ b/arch/arm/include/asm/arch-exynos/dmc.h
@@ -114,13 +114,22 @@  struct exynos4_dmc {
 struct exynos5_dmc {
 	unsigned int concontrol;
 	unsigned int memcontrol;
+
+/* Between 5250 and 5420, the DMC Register differs only at 0x8 offset.
+ * So to use the same structure and simplify the code put a define to
+ * distinguish between memconfig0 and cgcontrol register */
+#ifdef CONFIG_EXYNOS5250
 	unsigned int memconfig0;
+#else
+	unsigned int cgcontrol;
+#endif
 	unsigned int memconfig1;
 	unsigned int directcmd;
-	unsigned int prechconfig;
+	unsigned int prechconfig0;
 	unsigned int phycontrol0;
-	unsigned char res1[0xc];
-	unsigned int pwrdnconfig;
+	unsigned int prechconfig1;
+	unsigned char res1[0x8];
+	unsigned int pwrdnconfig;	/* 0x0028*/
 	unsigned int timingpzq;
 	unsigned int timingref;
 	unsigned int timingrow;
@@ -128,12 +137,12 @@  struct exynos5_dmc {
 	unsigned int timingpower;
 	unsigned int phystatus;
 	unsigned char res2[0x4];
-	unsigned int chipstatus_ch0;
+	unsigned int chipstatus_ch0;	/* 0x0048 */
 	unsigned int chipstatus_ch1;
 	unsigned char res3[0x4];
 	unsigned int mrstatus;
 	unsigned char res4[0x8];
-	unsigned int qoscontrol0;
+	unsigned int qoscontrol0;	/* 0x0060 */
 	unsigned char resr5[0x4];
 	unsigned int qoscontrol1;
 	unsigned char res6[0x4];
@@ -164,45 +173,83 @@  struct exynos5_dmc {
 	unsigned int qoscontrol14;
 	unsigned char res19[0x4];
 	unsigned int qoscontrol15;
-	unsigned char res20[0x14];
+	unsigned char res20[0x4];
+	unsigned int timing_set_sw;	/* 0x00e0 */
+	unsigned int timingrow1;
+	unsigned int timingdata1;
+	unsigned int timingpower1;
 	unsigned int ivcontrol;
 	unsigned int wrtra_config;
 	unsigned int rdlvl_config;
-	unsigned char res21[0x8];
+	unsigned char res21[0x4];
+	unsigned int brbrsvcontrol;	/* 0x0100*/
 	unsigned int brbrsvconfig;
 	unsigned int brbqosconfig;
 	unsigned int membaseconfig0;
-	unsigned int membaseconfig1;
+	unsigned int membaseconfig1;	/* 0x0110 */
 	unsigned char res22[0xc];
-	unsigned int wrlvl_config;
-	unsigned char res23[0xc];
-	unsigned int perevcontrol;
+	unsigned int wrlvl_config0;	/* 0x0120 */
+	unsigned int wrlvl_config1;
+	unsigned int wrlvl_status;
+	unsigned char res23[0x4];
+	unsigned int perevcontrol;	/* 0x0130 */
 	unsigned int perev0config;
 	unsigned int perev1config;
 	unsigned int perev2config;
 	unsigned int perev3config;
-	unsigned char res24[0xdebc];
-	unsigned int pmnc_ppc_a;
-	unsigned char res25[0xc];
-	unsigned int cntens_ppc_a;
-	unsigned char res26[0xc];
-	unsigned int cntenc_ppc_a;
-	unsigned char res27[0xc];
-	unsigned int intens_ppc_a;
-	unsigned char res28[0xc];
-	unsigned int intenc_ppc_a;
-	unsigned char res29[0xc];
-	unsigned int flag_ppc_a;
-	unsigned char res30[0xac];
-	unsigned int ccnt_ppc_a;
-	unsigned char res31[0xc];
-	unsigned int pmcnt0_ppc_a;
+	unsigned char res22a[0xc];
+	unsigned int ctrl_io_rdata_ch0;
+	unsigned int ctrl_io_rdata_ch1;
+	unsigned char res23a[0x8];
+	unsigned int cacal_config0;
+	unsigned int cacal_config1;
+	unsigned int cacal_status;
+	unsigned char res24[0x94];
+	unsigned int emergent_config0;	/* 0x0200 */
+	unsigned int emergent_config1;
+	unsigned char res25[0x8];
+	unsigned int bp_control0;
+	unsigned int bp_control0_r;
+	unsigned int bp_control0_w;
+	unsigned char res26[0x4];
+	unsigned int bp_control1;
+	unsigned int bp_control1_r;
+	unsigned int bp_control1_w;
+	unsigned char res27[0x4];
+	unsigned int bp_control2;
+	unsigned int bp_control2_r;
+	unsigned int bp_control2_w;
+	unsigned char res28[0x4];
+	unsigned int bp_control3;
+	unsigned int bp_control3_r;
+	unsigned int bp_control3_w;
+	unsigned char res29[0xb4];
+	unsigned int winconfig_odt_w;	/* 0x0300 */
+	unsigned char res30[0x4];
+	unsigned int winconfig_ctrl_read;
+	unsigned int winconfig_ctrl_gate;
+	unsigned char res31[0xdcf0];
+	unsigned int pmnc_ppc;
 	unsigned char res32[0xc];
-	unsigned int pmcnt1_ppc_a;
+	unsigned int cntens_ppc;
 	unsigned char res33[0xc];
-	unsigned int pmcnt2_ppc_a;
+	unsigned int cntenc_ppc;
 	unsigned char res34[0xc];
-	unsigned int pmcnt3_ppc_a;
+	unsigned int intens_ppc;
+	unsigned char res35[0xc];
+	unsigned int intenc_ppc;
+	unsigned char res36[0xc];
+	unsigned int flag_ppc;		/* 0xe050 */
+	unsigned char res37[0xac];
+	unsigned int ccnt_ppc;
+	unsigned char res38[0xc];
+	unsigned int pmcnt0_ppc;
+	unsigned char res39[0xc];
+	unsigned int pmcnt1_ppc;
+	unsigned char res40[0xc];
+	unsigned int pmcnt2_ppc;
+	unsigned char res41[0xc];
+	unsigned int pmcnt3_ppc;	/* 0xe140 */
 };
 
 struct exynos5_phy_control {
@@ -211,13 +258,13 @@  struct exynos5_phy_control {
 	unsigned int phy_con2;
 	unsigned int phy_con3;
 	unsigned int phy_con4;
-	unsigned char res1[4];
+	unsigned int phy_con5;
 	unsigned int phy_con6;
 	unsigned char res2[4];
 	unsigned int phy_con8;
 	unsigned int phy_con9;
 	unsigned int phy_con10;
-	unsigned char res3[4];
+	unsigned int phy_con11;
 	unsigned int phy_con12;
 	unsigned int phy_con13;
 	unsigned int phy_con14;
@@ -252,6 +299,15 @@  struct exynos5_phy_control {
 	unsigned int phy_con42;
 };
 
+struct exynos5_tzasc {
+	unsigned char res1[0xf00];
+	unsigned int membaseconfig0;
+	unsigned int membaseconfig1;
+	unsigned char res2[0x8];
+	unsigned int memconfig0;
+	unsigned int memconfig1;
+};
+
 enum ddr_mode {
 	DDR_MODE_DDR2,
 	DDR_MODE_DDR3,
@@ -286,6 +342,7 @@  enum mem_manuf {
 #define PHY_CON0_T_WRRDCMD_SHIFT	17
 #define PHY_CON0_T_WRRDCMD_MASK		(0x7 << PHY_CON0_T_WRRDCMD_SHIFT)
 #define PHY_CON0_CTRL_DDR_MODE_SHIFT	11
+#define PHY_CON0_CTRL_DDR_MODE_MASK	0x3
 
 /* PHY_CON1 register fields */
 #define PHY_CON1_RDLVL_RDDATA_ADJ_SHIFT	0