armv8: s32v234: Introduce basic support for s32v234evb

Add initial support for NXP's S32V234 SoC and S32V234EVB board.

The S32V230 family is designed to support computation-intensive applications
for image processing. The S32V234, as part of the S32V230 family, is a
high-performance automotive processor designed to support safe
computation-intensive applications in the area of vision and sensor fusion.

Code originally writen by:
Original-signed-off-by: Stoica Cosmin-Stefan <cosminstefan.stoica@freescale.com>
Original-signed-off-by: Mihaela Martinas <Mihaela.Martinas@freescale.com>
Original-signed-off-by: Eddy Petrișor <eddy.petrisor@gmail.com>

Signed-off-by: Eddy Petrișor <eddy.petrisor@nxp.com>

1 files changed, 137 insertions, 0 deletions

diff --git a/board/freescale/s32v234evb/lpddr2.c b/board/freescale/s32v234evb/lpddr2.c
new file mode 100644
index 0000000000..ecc0842bf0
--- /dev/null
+++ b/board/freescale/s32v234evb/lpddr2.c
@@ -0,0 +1,137 @@
+/*
+ * (C) Copyright 2015, Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/siul.h>
+#include <asm/arch/lpddr2.h>
+#include <asm/arch/mmdc.h>
+
+volatile int mscr_offset_ck0;
+
+void lpddr2_config_iomux(uint8_t module)
+{
+	int i;
+
+	switch (module) {
+	case DDR0:
+		mscr_offset_ck0 = SIUL2_MSCRn(_DDR0_CKE0);
+		writel(LPDDR2_CLK0_PAD, SIUL2_MSCRn(_DDR0_CLK0));
+
+		writel(LPDDR2_CKEn_PAD, SIUL2_MSCRn(_DDR0_CKE0));
+		writel(LPDDR2_CKEn_PAD, SIUL2_MSCRn(_DDR0_CKE1));
+
+		writel(LPDDR2_CS_Bn_PAD, SIUL2_MSCRn(_DDR0_CS_B0));
+		writel(LPDDR2_CS_Bn_PAD, SIUL2_MSCRn(_DDR0_CS_B1));
+
+		for (i = _DDR0_DM0; i <= _DDR0_DM3; i++)
+			writel(LPDDR2_DMn_PAD, SIUL2_MSCRn(i));
+
+		for (i = _DDR0_DQS0; i <= _DDR0_DQS3; i++)
+			writel(LPDDR2_DQSn_PAD, SIUL2_MSCRn(i));
+
+		for (i = _DDR0_A0; i <= _DDR0_A9; i++)
+			writel(LPDDR2_An_PAD, SIUL2_MSCRn(i));
+
+		for (i = _DDR0_D0; i <= _DDR0_D31; i++)
+			writel(LPDDR2_Dn_PAD, SIUL2_MSCRn(i));
+		break;
+	case DDR1:
+		writel(LPDDR2_CLK0_PAD, SIUL2_MSCRn(_DDR1_CLK0));
+
+		writel(LPDDR2_CKEn_PAD, SIUL2_MSCRn(_DDR1_CKE0));
+		writel(LPDDR2_CKEn_PAD, SIUL2_MSCRn(_DDR1_CKE1));
+
+		writel(LPDDR2_CS_Bn_PAD, SIUL2_MSCRn(_DDR1_CS_B0));
+		writel(LPDDR2_CS_Bn_PAD, SIUL2_MSCRn(_DDR1_CS_B1));
+
+		for (i = _DDR1_DM0; i <= _DDR1_DM3; i++)
+			writel(LPDDR2_DMn_PAD, SIUL2_MSCRn(i));
+
+		for (i = _DDR1_DQS0; i <= _DDR1_DQS3; i++)
+			writel(LPDDR2_DQSn_PAD, SIUL2_MSCRn(i));
+
+		for (i = _DDR1_A0; i <= _DDR1_A9; i++)
+			writel(LPDDR2_An_PAD, SIUL2_MSCRn(i));
+
+		for (i = _DDR1_D0; i <= _DDR1_D31; i++)
+			writel(LPDDR2_Dn_PAD, SIUL2_MSCRn(i));
+		break;
+	}
+}
+
+void config_mmdc(uint8_t module)
+{
+	unsigned long mmdc_addr = (module) ? MMDC1_BASE_ADDR : MMDC0_BASE_ADDR;
+
+	writel(MMDC_MDSCR_CFG_VALUE, mmdc_addr + MMDC_MDSCR);
+
+	writel(MMDC_MDCFG0_VALUE, mmdc_addr + MMDC_MDCFG0);
+	writel(MMDC_MDCFG1_VALUE, mmdc_addr + MMDC_MDCFG1);
+	writel(MMDC_MDCFG2_VALUE, mmdc_addr + MMDC_MDCFG2);
+	writel(MMDC_MDCFG3LP_VALUE, mmdc_addr + MMDC_MDCFG3LP);
+	writel(MMDC_MDOTC_VALUE, mmdc_addr + MMDC_MDOTC);
+	writel(MMDC_MDMISC_VALUE, mmdc_addr + MMDC_MDMISC);
+	writel(MMDC_MDOR_VALUE, mmdc_addr + MMDC_MDOR);
+	writel(_MDCTL, mmdc_addr + MMDC_MDCTL);
+
+	writel(MMDC_MPMUR0_VALUE, mmdc_addr + MMDC_MPMUR0);
+
+	while (readl(mmdc_addr + MMDC_MPMUR0) & MMDC_MPMUR0_FRC_MSR) {
+	}
+
+	writel(MMDC_MDSCR_RST_VALUE, mmdc_addr + MMDC_MDSCR);
+
+	/* Perform ZQ calibration */
+	writel(MMDC_MPZQLP2CTL_VALUE, mmdc_addr + MMDC_MPZQLP2CTL);
+	writel(MMDC_MPZQHWCTRL_VALUE, mmdc_addr + MMDC_MPZQHWCTRL);
+	while (readl(mmdc_addr + MMDC_MPZQHWCTRL) & MMDC_MPZQHWCTRL_ZQ_HW_FOR) {
+	}
+
+	/* Enable MMDC with CS0 */
+	writel(_MDCTL + 0x80000000, mmdc_addr + MMDC_MDCTL);
+
+	/* Complete the initialization sequence as defined by JEDEC */
+	writel(MMDC_MDSCR_MR1_VALUE, mmdc_addr + MMDC_MDSCR);
+	writel(MMDC_MDSCR_MR2_VALUE, mmdc_addr + MMDC_MDSCR);
+	writel(MMDC_MDSCR_MR3_VALUE, mmdc_addr + MMDC_MDSCR);
+	writel(MMDC_MDSCR_MR10_VALUE, mmdc_addr + MMDC_MDSCR);
+
+	/* Set the amount of DRAM */
+	/* Set DQS settings based on board type */
+
+	switch (module) {
+	case MMDC0:
+		writel(MMDC_MDASP_MODULE0_VALUE, mmdc_addr + MMDC_MDASP);
+		writel(MMDC_MPRDDLCTL_MODULE0_VALUE,
+		       mmdc_addr + MMDC_MPRDDLCTL);
+		writel(MMDC_MPWRDLCTL_MODULE0_VALUE,
+		       mmdc_addr + MMDC_MPWRDLCTL);
+		writel(MMDC_MPDGCTRL0_MODULE0_VALUE,
+		       mmdc_addr + MMDC_MPDGCTRL0);
+		writel(MMDC_MPDGCTRL1_MODULE0_VALUE,
+		       mmdc_addr + MMDC_MPDGCTRL1);
+		break;
+	case MMDC1:
+		writel(MMDC_MDASP_MODULE1_VALUE, mmdc_addr + MMDC_MDASP);
+		writel(MMDC_MPRDDLCTL_MODULE1_VALUE,
+		       mmdc_addr + MMDC_MPRDDLCTL);
+		writel(MMDC_MPWRDLCTL_MODULE1_VALUE,
+		       mmdc_addr + MMDC_MPWRDLCTL);
+		writel(MMDC_MPDGCTRL0_MODULE1_VALUE,
+		       mmdc_addr + MMDC_MPDGCTRL0);
+		writel(MMDC_MPDGCTRL1_MODULE1_VALUE,
+		       mmdc_addr + MMDC_MPDGCTRL1);
+		break;
+	}
+
+	writel(MMDC_MDRWD_VALUE, mmdc_addr + MMDC_MDRWD);
+	writel(MMDC_MDPDC_VALUE, mmdc_addr + MMDC_MDPDC);
+	writel(MMDC_MDREF_VALUE, mmdc_addr + MMDC_MDREF);
+	writel(MMDC_MPODTCTRL_VALUE, mmdc_addr + MMDC_MPODTCTRL);
+	writel(MMDC_MDSCR_DEASSERT_VALUE, mmdc_addr + MMDC_MDSCR);
+
+}