ddr: altera: stratix10: Add DDR support for Stratix10 SoC

Add DDR support for Stratix SoC

Signed-off-by: Chin Liang See <chin.liang.see@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>

2 files changed, 389 insertions, 0 deletions

diff --git a/drivers/ddr/altera/Makefile b/drivers/ddr/altera/Makefile
index f05314a373..3615b617ec 100644
--- a/drivers/ddr/altera/Makefile
+++ b/drivers/ddr/altera/Makefile
@@ -9,4 +9,5 @@
 ifdef CONFIG_ALTERA_SDRAM
 obj-$(CONFIG_TARGET_SOCFPGA_GEN5) += sdram_gen5.o sequencer.o
 obj-$(CONFIG_TARGET_SOCFPGA_ARRIA10) += sdram_arria10.o
+obj-$(CONFIG_TARGET_SOCFPGA_STRATIX10) += sdram_s10.o
 endif
diff --git a/drivers/ddr/altera/sdram_s10.c b/drivers/ddr/altera/sdram_s10.c
new file mode 100644
index 0000000000..48f4f47b14
--- /dev/null
+++ b/drivers/ddr/altera/sdram_s10.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2016-2018 Intel Corporation <www.intel.com>
+ *
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <div64.h>
+#include <asm/io.h>
+#include <wait_bit.h>
+#include <asm/arch/firewall_s10.h>
+#include <asm/arch/sdram_s10.h>
+#include <asm/arch/system_manager.h>
+#include <asm/arch/reset_manager.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct socfpga_system_manager *sysmgr_regs =
+		(void *)SOCFPGA_SYSMGR_ADDRESS;
+
+#define DDR_CONFIG(A, B, C, R)	(((A) << 24) | ((B) << 16) | ((C) << 8) | (R))
+
+/* The followring are the supported configurations */
+u32 ddr_config[] = {
+	/* DDR_CONFIG(Address order,Bank,Column,Row) */
+	/* List for DDR3 or LPDDR3 (pinout order > chip, row, bank, column) */
+	DDR_CONFIG(0, 3, 10, 12),
+	DDR_CONFIG(0, 3,  9, 13),
+	DDR_CONFIG(0, 3, 10, 13),
+	DDR_CONFIG(0, 3,  9, 14),
+	DDR_CONFIG(0, 3, 10, 14),
+	DDR_CONFIG(0, 3, 10, 15),
+	DDR_CONFIG(0, 3, 11, 14),
+	DDR_CONFIG(0, 3, 11, 15),
+	DDR_CONFIG(0, 3, 10, 16),
+	DDR_CONFIG(0, 3, 11, 16),
+	DDR_CONFIG(0, 3, 12, 15),	/* 0xa */
+	/* List for DDR4 only (pinout order > chip, bank, row, column) */
+	DDR_CONFIG(1, 3, 10, 14),
+	DDR_CONFIG(1, 4, 10, 14),
+	DDR_CONFIG(1, 3, 10, 15),
+	DDR_CONFIG(1, 4, 10, 15),
+	DDR_CONFIG(1, 3, 10, 16),
+	DDR_CONFIG(1, 4, 10, 16),
+	DDR_CONFIG(1, 3, 10, 17),
+	DDR_CONFIG(1, 4, 10, 17),
+};
+
+static u32 hmc_readl(u32 reg)
+{
+	return readl(((void __iomem *)SOCFPGA_HMC_MMR_IO48_ADDRESS + (reg)));
+}
+
+static u32 hmc_ecc_readl(u32 reg)
+{
+	return readl((void __iomem *)SOCFPGA_SDR_ADDRESS + (reg));
+}
+
+static u32 hmc_ecc_writel(u32 data, u32 reg)
+{
+	return writel(data, (void __iomem *)SOCFPGA_SDR_ADDRESS + (reg));
+}
+
+static u32 ddr_sch_writel(u32 data, u32 reg)
+{
+	return writel(data,
+		      (void __iomem *)SOCFPGA_SDR_SCHEDULER_ADDRESS + (reg));
+}
+
+int match_ddr_conf(u32 ddr_conf)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ddr_config); i++) {
+		if (ddr_conf == ddr_config[i])
+			return i;
+	}
+	return 0;
+}
+
+static int emif_clear(void)
+{
+	hmc_ecc_writel(0, RSTHANDSHAKECTRL);
+
+	return wait_for_bit_le32((const void *)(SOCFPGA_SDR_ADDRESS +
+				 RSTHANDSHAKESTAT),
+				 DDR_HMC_RSTHANDSHAKE_MASK,
+				 false, 1000, false);
+}
+
+static int emif_reset(void)
+{
+	u32 c2s, s2c, ret;
+
+	c2s = hmc_ecc_readl(RSTHANDSHAKECTRL) & DDR_HMC_RSTHANDSHAKE_MASK;
+	s2c = hmc_ecc_readl(RSTHANDSHAKESTAT) & DDR_HMC_RSTHANDSHAKE_MASK;
+
+	debug("DDR: c2s=%08x s2c=%08x nr0=%08x nr1=%08x nr2=%08x dst=%08x\n",
+	      c2s, s2c, hmc_readl(NIOSRESERVED0), hmc_readl(NIOSRESERVED1),
+	      hmc_readl(NIOSRESERVED2), hmc_readl(DRAMSTS));
+
+	if (s2c && emif_clear()) {
+		printf("DDR: emif_clear() failed\n");
+		return -1;
+	}
+
+	debug("DDR: Triggerring emif reset\n");
+	hmc_ecc_writel(DDR_HMC_CORE2SEQ_INT_REQ, RSTHANDSHAKECTRL);
+
+	/* if seq2core[3] = 0, we are good */
+	ret = wait_for_bit_le32((const void *)(SOCFPGA_SDR_ADDRESS +
+				 RSTHANDSHAKESTAT),
+				 DDR_HMC_SEQ2CORE_INT_RESP_MASK,
+				 false, 1000, false);
+	if (ret) {
+		printf("DDR: failed to get ack from EMIF\n");
+		return ret;
+	}
+
+	ret = emif_clear();
+	if (ret) {
+		printf("DDR: emif_clear() failed\n");
+		return ret;
+	}
+
+	debug("DDR: %s triggered successly\n", __func__);
+	return 0;
+}
+
+static int poll_hmc_clock_status(void)
+{
+	return wait_for_bit_le32(&sysmgr_regs->hmc_clk,
+				 SYSMGR_HMC_CLK_STATUS_MSK, true, 1000, false);
+}
+
+/**
+ * sdram_mmr_init_full() - Function to initialize SDRAM MMR
+ *
+ * Initialize the SDRAM MMR.
+ */
+int sdram_mmr_init_full(unsigned int unused)
+{
+	u32 update_value, io48_value, ddrioctl;
+	u32 i;
+	int ret;
+
+	/* Enable access to DDR from CPU master */
+	clrbits_le32(CCU_REG_ADDR(CCU_CPU0_MPRT_ADBASE_DDRREG),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_CPU0_MPRT_ADBASE_MEMSPACE0),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_CPU0_MPRT_ADBASE_MEMSPACE1A),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_CPU0_MPRT_ADBASE_MEMSPACE1B),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_CPU0_MPRT_ADBASE_MEMSPACE1C),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_CPU0_MPRT_ADBASE_MEMSPACE1D),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_CPU0_MPRT_ADBASE_MEMSPACE1E),
+		     CCU_ADBASE_DI_MASK);
+
+	/* Enable access to DDR from IO master */
+	clrbits_le32(CCU_REG_ADDR(CCU_IOM_MPRT_ADBASE_MEMSPACE0),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_IOM_MPRT_ADBASE_MEMSPACE1A),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_IOM_MPRT_ADBASE_MEMSPACE1B),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_IOM_MPRT_ADBASE_MEMSPACE1C),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_IOM_MPRT_ADBASE_MEMSPACE1D),
+		     CCU_ADBASE_DI_MASK);
+	clrbits_le32(CCU_REG_ADDR(CCU_IOM_MPRT_ADBASE_MEMSPACE1E),
+		     CCU_ADBASE_DI_MASK);
+
+	/* this enables nonsecure access to DDR */
+	/* mpuregion0addr_limit */
+	FW_MPU_DDR_SCR_WRITEL(0xFFFF0000, FW_MPU_DDR_SCR_MPUREGION0ADDR_LIMIT);
+	FW_MPU_DDR_SCR_WRITEL(0x1F, FW_MPU_DDR_SCR_MPUREGION0ADDR_LIMITEXT);
+
+	/* nonmpuregion0addr_limit */
+	FW_MPU_DDR_SCR_WRITEL(0xFFFF0000,
+			      FW_MPU_DDR_SCR_NONMPUREGION0ADDR_LIMIT);
+	FW_MPU_DDR_SCR_WRITEL(0x1F, FW_MPU_DDR_SCR_NONMPUREGION0ADDR_LIMITEXT);
+
+	/* Enable mpuregion0enable and nonmpuregion0enable */
+	FW_MPU_DDR_SCR_WRITEL(MPUREGION0_ENABLE | NONMPUREGION0_ENABLE,
+			      FW_MPU_DDR_SCR_EN_SET);
+
+	/* Ensure HMC clock is running */
+	if (poll_hmc_clock_status()) {
+		puts("DDR: Error as HMC clock not running\n");
+		return -1;
+	}
+
+	/* release DDR scheduler from reset */
+	socfpga_per_reset(SOCFPGA_RESET(SDR), 0);
+
+	/* Try 3 times to do a calibration */
+	for (i = 0; i < 3; i++) {
+		ret = wait_for_bit_le32((const void *)(SOCFPGA_SDR_ADDRESS +
+					DDRCALSTAT),
+					DDR_HMC_DDRCALSTAT_CAL_MSK, true, 1000,
+					false);
+		if (!ret)
+			break;
+
+		emif_reset();
+	}
+
+	if (ret) {
+		puts("DDR: Error as SDRAM calibration failed\n");
+		return -1;
+	}
+	debug("DDR: Calibration success\n");
+
+	u32 ctrlcfg0 = hmc_readl(CTRLCFG0);
+	u32 ctrlcfg1 = hmc_readl(CTRLCFG1);
+	u32 dramaddrw = hmc_readl(DRAMADDRW);
+	u32 dramtim0 = hmc_readl(DRAMTIMING0);
+	u32 caltim0 = hmc_readl(CALTIMING0);
+	u32 caltim1 = hmc_readl(CALTIMING1);
+	u32 caltim2 = hmc_readl(CALTIMING2);
+	u32 caltim3 = hmc_readl(CALTIMING3);
+	u32 caltim4 = hmc_readl(CALTIMING4);
+	u32 caltim9 = hmc_readl(CALTIMING9);
+
+	/*
+	 * Configure the DDR IO size [0xFFCFB008]
+	 * niosreserve0: Used to indicate DDR width &
+	 *	bit[7:0] = Number of data bits (bit[6:5] 0x01=32bit, 0x10=64bit)
+	 *	bit[8]   = 1 if user-mode OCT is present
+	 *	bit[9]   = 1 if warm reset compiled into EMIF Cal Code
+	 *	bit[10]  = 1 if warm reset is on during generation in EMIF Cal
+	 * niosreserve1: IP ADCDS version encoded as 16 bit value
+	 *	bit[2:0] = Variant (0=not special,1=FAE beta, 2=Customer beta,
+	 *			    3=EAP, 4-6 are reserved)
+	 *	bit[5:3] = Service Pack # (e.g. 1)
+	 *	bit[9:6] = Minor Release #
+	 *	bit[14:10] = Major Release #
+	 */
+	update_value = hmc_readl(NIOSRESERVED0);
+	hmc_ecc_writel(((update_value & 0xFF) >> 5), DDRIOCTRL);
+	ddrioctl = hmc_ecc_readl(DDRIOCTRL);
+
+	/* enable HPS interface to HMC */
+	hmc_ecc_writel(DDR_HMC_HPSINTFCSEL_ENABLE_MASK, HPSINTFCSEL);
+
+	/* Set the DDR Configuration */
+	io48_value = DDR_CONFIG(CTRLCFG1_CFG_ADDR_ORDER(ctrlcfg1),
+				(DRAMADDRW_CFG_BANK_ADDR_WIDTH(dramaddrw) +
+				 DRAMADDRW_CFG_BANK_GRP_ADDR_WIDTH(dramaddrw)),
+				DRAMADDRW_CFG_COL_ADDR_WIDTH(dramaddrw),
+				DRAMADDRW_CFG_ROW_ADDR_WIDTH(dramaddrw));
+
+	update_value = match_ddr_conf(io48_value);
+	if (update_value)
+		ddr_sch_writel(update_value, DDR_SCH_DDRCONF);
+
+	/* Configure HMC dramaddrw */
+	hmc_ecc_writel(hmc_readl(DRAMADDRW), DRAMADDRWIDTH);
+
+	/*
+	 * Configure DDR timing
+	 *  RDTOMISS = tRTP + tRP + tRCD - BL/2
+	 *  WRTOMISS = WL + tWR + tRP + tRCD and
+	 *    WL = RL + BL/2 + 2 - rd-to-wr ; tWR = 15ns  so...
+	 *  First part of equation is in memory clock units so divide by 2
+	 *  for HMC clock units. 1066MHz is close to 1ns so use 15 directly.
+	 *  WRTOMISS = ((RL + BL/2 + 2 + tWR) >> 1)- rd-to-wr + tRP + tRCD
+	 */
+	u32 burst_len = CTRLCFG0_CFG_CTRL_BURST_LEN(ctrlcfg0);
+
+	update_value = CALTIMING2_CFG_RD_TO_WR_PCH(caltim2) +
+		       CALTIMING4_CFG_PCH_TO_VALID(caltim4) +
+		       CALTIMING0_CFG_ACT_TO_RDWR(caltim0) -
+		       (burst_len >> 2);
+	io48_value = (((DRAMTIMING0_CFG_TCL(dramtim0) + 2 + DDR_TWR +
+		       (burst_len >> 1)) >> 1) -
+		      /* Up to here was in memory cycles so divide by 2 */
+		      CALTIMING1_CFG_RD_TO_WR(caltim1) +
+		      CALTIMING0_CFG_ACT_TO_RDWR(caltim0) +
+		      CALTIMING4_CFG_PCH_TO_VALID(caltim4));
+
+	ddr_sch_writel(((CALTIMING0_CFG_ACT_TO_ACT(caltim0) <<
+			 DDR_SCH_DDRTIMING_ACTTOACT_OFF) |
+			(update_value << DDR_SCH_DDRTIMING_RDTOMISS_OFF) |
+			(io48_value << DDR_SCH_DDRTIMING_WRTOMISS_OFF) |
+			((burst_len >> 2) << DDR_SCH_DDRTIMING_BURSTLEN_OFF) |
+			(CALTIMING1_CFG_RD_TO_WR(caltim1) <<
+			 DDR_SCH_DDRTIMING_RDTOWR_OFF) |
+			(CALTIMING3_CFG_WR_TO_RD(caltim3) <<
+			 DDR_SCH_DDRTIMING_WRTORD_OFF) |
+			(((ddrioctl == 1) ? 1 : 0) <<
+			 DDR_SCH_DDRTIMING_BWRATIO_OFF)),
+			DDR_SCH_DDRTIMING);
+
+	/* Configure DDR mode [precharge = 0] */
+	ddr_sch_writel(((ddrioctl ? 0 : 1) <<
+			 DDR_SCH_DDRMOD_BWRATIOEXTENDED_OFF),
+			DDR_SCH_DDRMODE);
+
+	/* Configure the read latency */
+	ddr_sch_writel((DRAMTIMING0_CFG_TCL(dramtim0) >> 1) +
+			DDR_READ_LATENCY_DELAY,
+			DDR_SCH_READ_LATENCY);
+
+	/*
+	 * Configuring timing values concerning activate commands
+	 * [FAWBANK alway 1 because always 4 bank DDR]
+	 */
+	ddr_sch_writel(((CALTIMING0_CFG_ACT_TO_ACT_DB(caltim0) <<
+			 DDR_SCH_ACTIVATE_RRD_OFF) |
+			(CALTIMING9_CFG_4_ACT_TO_ACT(caltim9) <<
+			 DDR_SCH_ACTIVATE_FAW_OFF) |
+			(DDR_ACTIVATE_FAWBANK <<
+			 DDR_SCH_ACTIVATE_FAWBANK_OFF)),
+			DDR_SCH_ACTIVATE);
+
+	/*
+	 * Configuring timing values concerning device to device data bus
+	 * ownership change
+	 */
+	ddr_sch_writel(((CALTIMING1_CFG_RD_TO_RD_DC(caltim1) <<
+			 DDR_SCH_DEVTODEV_BUSRDTORD_OFF) |
+			(CALTIMING1_CFG_RD_TO_WR_DC(caltim1) <<
+			 DDR_SCH_DEVTODEV_BUSRDTOWR_OFF) |
+			(CALTIMING3_CFG_WR_TO_RD_DC(caltim3) <<
+			 DDR_SCH_DEVTODEV_BUSWRTORD_OFF)),
+			DDR_SCH_DEVTODEV);
+
+	/* assigning the SDRAM size */
+	unsigned long long size = sdram_calculate_size();
+	/* If the size is invalid, use default Config size */
+	if (size <= 0)
+		gd->ram_size = PHYS_SDRAM_1_SIZE;
+	else
+		gd->ram_size = size;
+
+	/* Enable or disable the SDRAM ECC */
+	if (CTRLCFG1_CFG_CTRL_EN_ECC(ctrlcfg1)) {
+		setbits_le32(SOCFPGA_SDR_ADDRESS + ECCCTRL1,
+			     (DDR_HMC_ECCCTL_AWB_CNT_RST_SET_MSK |
+			      DDR_HMC_ECCCTL_CNT_RST_SET_MSK |
+			      DDR_HMC_ECCCTL_ECC_EN_SET_MSK));
+		clrbits_le32(SOCFPGA_SDR_ADDRESS + ECCCTRL1,
+			     (DDR_HMC_ECCCTL_AWB_CNT_RST_SET_MSK |
+			      DDR_HMC_ECCCTL_CNT_RST_SET_MSK));
+		setbits_le32(SOCFPGA_SDR_ADDRESS + ECCCTRL2,
+			     (DDR_HMC_ECCCTL2_RMW_EN_SET_MSK |
+			      DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
+	} else {
+		clrbits_le32(SOCFPGA_SDR_ADDRESS + ECCCTRL1,
+			     (DDR_HMC_ECCCTL_AWB_CNT_RST_SET_MSK |
+			      DDR_HMC_ECCCTL_CNT_RST_SET_MSK |
+			      DDR_HMC_ECCCTL_ECC_EN_SET_MSK));
+		clrbits_le32(SOCFPGA_SDR_ADDRESS + ECCCTRL2,
+			     (DDR_HMC_ECCCTL2_RMW_EN_SET_MSK |
+			      DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
+	}
+
+	debug("DDR: HMC init success\n");
+	return 0;
+}
+
+/**
+ * sdram_calculate_size() - Calculate SDRAM size
+ *
+ * Calculate SDRAM device size based on SDRAM controller parameters.
+ * Size is specified in bytes.
+ */
+unsigned long sdram_calculate_size(void)
+{
+	u32 dramaddrw = hmc_readl(DRAMADDRW);
+
+	u32 size = 1 << (DRAMADDRW_CFG_CS_ADDR_WIDTH(dramaddrw) +
+			 DRAMADDRW_CFG_BANK_GRP_ADDR_WIDTH(dramaddrw) +
+			 DRAMADDRW_CFG_BANK_ADDR_WIDTH(dramaddrw) +
+			 DRAMADDRW_CFG_ROW_ADDR_WIDTH(dramaddrw) +
+			 DRAMADDRW_CFG_COL_ADDR_WIDTH(dramaddrw));
+
+	size *= (2 << (hmc_ecc_readl(DDRIOCTRL) &
+			DDR_HMC_DDRIOCTRL_IOSIZE_MSK));
+
+	return size;
+}