ddr: altera: agilex: Add SDRAM driver for Agilex

Add SDRAM driver for Agilex SoC.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>

5 files changed, 174 insertions, 3 deletions

diff --git a/drivers/ddr/altera/Kconfig b/drivers/ddr/altera/Kconfig
index 2b1c1be3b5..8f590dc5f6 100644
--- a/drivers/ddr/altera/Kconfig
+++ b/drivers/ddr/altera/Kconfig
@@ -1,8 +1,8 @@
 config SPL_ALTERA_SDRAM
 	bool "SoCFPGA DDR SDRAM driver in SPL"
 	depends on SPL
-	depends on TARGET_SOCFPGA_GEN5 || TARGET_SOCFPGA_ARRIA10 || TARGET_SOCFPGA_STRATIX10
-	select RAM if TARGET_SOCFPGA_GEN5 || TARGET_SOCFPGA_STRATIX10
-	select SPL_RAM if TARGET_SOCFPGA_GEN5 || TARGET_SOCFPGA_STRATIX10
+	depends on TARGET_SOCFPGA_GEN5 || TARGET_SOCFPGA_ARRIA10 || TARGET_SOCFPGA_STRATIX10 || TARGET_SOCFPGA_AGILEX
+	select RAM if TARGET_SOCFPGA_GEN5 || TARGET_SOCFPGA_STRATIX10 || TARGET_SOCFPGA_AGILEX
+	select SPL_RAM if TARGET_SOCFPGA_GEN5 || TARGET_SOCFPGA_STRATIX10 || TARGET_SOCFPGA_AGILEX
 	help
 	  Enable DDR SDRAM controller for the SoCFPGA devices.
diff --git a/drivers/ddr/altera/Makefile b/drivers/ddr/altera/Makefile
index eb8da13b7d..39dfee5d5a 100644
--- a/drivers/ddr/altera/Makefile
+++ b/drivers/ddr/altera/Makefile
@@ -10,4 +10,5 @@ ifdef CONFIG_$(SPL_)ALTERA_SDRAM
 obj-$(CONFIG_TARGET_SOCFPGA_GEN5) += sdram_gen5.o sequencer.o
 obj-$(CONFIG_TARGET_SOCFPGA_ARRIA10) += sdram_arria10.o
 obj-$(CONFIG_TARGET_SOCFPGA_STRATIX10) += sdram_soc64.o sdram_s10.o
+obj-$(CONFIG_TARGET_SOCFPGA_AGILEX) += sdram_soc64.o sdram_agilex.o
 endif
diff --git a/drivers/ddr/altera/sdram_agilex.c b/drivers/ddr/altera/sdram_agilex.c
new file mode 100644
index 0000000000..cc7679a6e4
--- /dev/null
+++ b/drivers/ddr/altera/sdram_agilex.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Intel Corporation <www.intel.com>
+ *
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <div64.h>
+#include <fdtdec.h>
+#include <ram.h>
+#include <reset.h>
+#include "sdram_soc64.h"
+#include <wait_bit.h>
+#include <asm/arch/firewall.h>
+#include <asm/arch/reset_manager.h>
+#include <asm/arch/system_manager.h>
+#include <asm/io.h>
+#include <linux/sizes.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int sdram_mmr_init_full(struct udevice *dev)
+{
+	struct altera_sdram_platdata *plat = dev->platdata;
+	struct altera_sdram_priv *priv = dev_get_priv(dev);
+	u32 i;
+	int ret;
+	phys_size_t hw_size;
+	bd_t bd = {0};
+
+	/* Ensure HMC clock is running */
+	if (poll_hmc_clock_status()) {
+		debug("DDR: Error as HMC clock was not running\n");
+		return -EPERM;
+	}
+
+	/* Trying 3 times to do a calibration */
+	for (i = 0; i < 3; i++) {
+		ret = wait_for_bit_le32((const void *)(plat->hmc +
+					DDRCALSTAT),
+					DDR_HMC_DDRCALSTAT_CAL_MSK, true, 1000,
+					false);
+		if (!ret)
+			break;
+
+		emif_reset(plat);
+	}
+
+	if (ret) {
+		puts("DDR: Error as SDRAM calibration failed\n");
+		return -EPERM;
+	}
+	debug("DDR: Calibration success\n");
+
+	/*
+	 * Configure the DDR IO size
+	 * 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 #
+	 */
+	/* Configure DDR IO size x16, x32 and x64 mode */
+	u32 update_value;
+
+	update_value = hmc_readl(plat, NIOSRESERVED0);
+	update_value = (update_value & 0xFF) >> 5;
+
+	/* Configure DDR data rate 0-HAlf-rate 1-Quarter-rate */
+	update_value |= (hmc_readl(plat, CTRLCFG3) & 0x4);
+	hmc_ecc_writel(plat, update_value, DDRIOCTRL);
+
+	/* Copy values MMR IOHMC dramaddrw to HMC adp DRAMADDRWIDTH */
+	hmc_ecc_writel(plat, hmc_readl(plat, DRAMADDRW), DRAMADDRWIDTH);
+
+	/* assigning the SDRAM size */
+	phys_size_t size = sdram_calculate_size(plat);
+
+	if (size <= 0)
+		hw_size = PHYS_SDRAM_1_SIZE;
+	else
+		hw_size = size;
+
+	/* Get bank configuration from devicetree */
+	ret = fdtdec_decode_ram_size(gd->fdt_blob, NULL, 0, NULL,
+				     (phys_size_t *)&gd->ram_size, &bd);
+	if (ret) {
+		puts("DDR: Failed to decode memory node\n");
+		return -ENXIO;
+	}
+
+	if (gd->ram_size != hw_size) {
+		printf("DDR: Warning: DRAM size from device tree (%lld MiB)\n",
+		       gd->ram_size >> 20);
+		printf(" mismatch with hardware (%lld MiB).\n",
+		       hw_size >> 20);
+	}
+
+	if (gd->ram_size > hw_size) {
+		printf("DDR: Error: DRAM size from device tree is greater\n");
+		printf(" than hardware size.\n");
+		hang();
+	}
+
+	printf("DDR: %lld MiB\n", gd->ram_size >> 20);
+
+	/* This enables nonsecure access to DDR */
+	/* mpuregion0addr_limit */
+	FW_MPU_DDR_SCR_WRITEL(gd->ram_size - 1,
+			      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(gd->ram_size - 1,
+			      FW_MPU_DDR_SCR_NONMPUREGION0ADDR_LIMIT);
+
+	/* Enable mpuregion0enable and nonmpuregion0enable */
+	FW_MPU_DDR_SCR_WRITEL(MPUREGION0_ENABLE | NONMPUREGION0_ENABLE,
+			      FW_MPU_DDR_SCR_EN_SET);
+
+	u32 ctrlcfg1 = hmc_readl(plat, CTRLCFG1);
+
+	/* Enable or disable the DDR ECC */
+	if (CTRLCFG1_CFG_CTRL_EN_ECC(ctrlcfg1)) {
+		setbits_le32(plat->hmc + 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(plat->hmc + ECCCTRL1,
+			     (DDR_HMC_ECCCTL_AWB_CNT_RST_SET_MSK |
+			      DDR_HMC_ECCCTL_CNT_RST_SET_MSK));
+		setbits_le32(plat->hmc + ECCCTRL2,
+			     (DDR_HMC_ECCCTL2_RMW_EN_SET_MSK |
+			      DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
+		setbits_le32(plat->hmc + ERRINTEN,
+			     DDR_HMC_ERRINTEN_DERRINTEN_EN_SET_MSK);
+
+		/* Enable non-secure writes to HMC Adapter for SDRAM ECC */
+		writel(FW_HMC_ADAPTOR_MPU_MASK, FW_HMC_ADAPTOR_REG_ADDR);
+
+		if (!cpu_has_been_warmreset())
+			sdram_init_ecc_bits(&bd);
+	} else {
+		clrbits_le32(plat->hmc + 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(plat->hmc + ECCCTRL2,
+			     (DDR_HMC_ECCCTL2_RMW_EN_SET_MSK |
+			      DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
+	}
+
+	sdram_size_check(&bd);
+
+	priv->info.base = bd.bi_dram[0].start;
+	priv->info.size = gd->ram_size;
+
+	debug("DDR: HMC init success\n");
+	return 0;
+}
diff --git a/drivers/ddr/altera/sdram_soc64.c b/drivers/ddr/altera/sdram_soc64.c
index 263f3f2f6f..985a108b1c 100644
--- a/drivers/ddr/altera/sdram_soc64.c
+++ b/drivers/ddr/altera/sdram_soc64.c
@@ -289,6 +289,7 @@ static struct ram_ops altera_sdram_ops = {
 
 static const struct udevice_id altera_sdram_ids[] = {
 	{ .compatible = "altr,sdr-ctl-s10" },
+	{ .compatible = "intel,sdr-ctl-agilex" },
 	{ /* sentinel */ }
 };
 
diff --git a/drivers/ddr/altera/sdram_soc64.h b/drivers/ddr/altera/sdram_soc64.h
index 7d018e76d8..7b25a80ae2 100644
--- a/drivers/ddr/altera/sdram_soc64.h
+++ b/drivers/ddr/altera/sdram_soc64.h
@@ -65,6 +65,7 @@ struct altera_sdram_platdata {
 /* HMC MMR IO48 registers */
 #define CTRLCFG0			0x28
 #define CTRLCFG1			0x2c
+#define CTRLCFG3                        0x34
 #define DRAMTIMING0			0x50
 #define CALTIMING0			0x7c
 #define CALTIMING1			0x80