drivers: renesas: rzg: Add HiHope RZ/G2M board support

Add support for HiHope RZ/G2M board.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Change-Id: Ic8eed0729a42aeee94fc96d16b15b928232488a3

drivers/renesas/rzg/board/board.c

+/*
+ * Copyright (c) 2020, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+
+#include <lib/mmio.h>
+#include <lib/utils_def.h>
+
+#include "board.h"
+#include "rcar_def.h"
+
+#ifndef BOARD_DEFAULT
+#define BOARD_DEFAULT		(BOARD_HIHOPE_RZ_G2M << BOARD_CODE_SHIFT)
+#endif /* BOARD_DEFAULT */
+
+#define BOARD_CODE_MASK		(0xF8U)
+#define BOARD_REV_MASK		(0x07U)
+#define BOARD_CODE_SHIFT	(0x03)
+#define BOARD_ID_UNKNOWN	(0xFFU)
+
+#define GPIO_INDT5	0xE605500C
+#define GP5_19_BIT	(0x01U << 19)
+#define GP5_21_BIT	(0x01U << 21)
+#define GP5_25_BIT	(0x01U << 25)
+
+#define HM_ID	{ 0x10U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+
+const char *g_board_tbl[] = {
+	[BOARD_HIHOPE_RZ_G2M] = "HiHope RZ/G2M",
+	[BOARD_UNKNOWN] = "unknown"
+};
+
+void rzg_get_board_type(uint32_t *type, uint32_t *rev)
+{
+	static uint8_t board_id = BOARD_ID_UNKNOWN;
+	const uint8_t board_tbl[][8] = {
+		[BOARD_HIHOPE_RZ_G2M] = HM_ID,
+	};
+	uint32_t reg, boardInfo;
+
+	if (board_id == BOARD_ID_UNKNOWN) {
+		board_id = BOARD_DEFAULT;
+	}
+
+	*type = ((uint32_t) board_id & BOARD_CODE_MASK) >> BOARD_CODE_SHIFT;
+
+	if (*type >= ARRAY_SIZE(board_tbl)) {
+		/* no revision information, set Rev0.0. */
+		*rev = 0;
+	} else {
+		reg = mmio_read_32(RCAR_PRR);
+		if ((reg & PRR_CUT_MASK) == RCAR_M3_CUT_VER11) {
+			*rev = board_tbl[*type][(uint8_t)(board_id & BOARD_REV_MASK)];
+		} else {
+			boardInfo = mmio_read_32(GPIO_INDT5) &
+				    (GP5_19_BIT | GP5_21_BIT);
+			*rev = (((boardInfo & GP5_19_BIT) >> 14) |
+				((boardInfo & GP5_21_BIT) >> 17)) + 0x30U;
+		}
+	}
+}

drivers/renesas/rzg/board/board.h

+/*
+ * Copyright (c) 2020, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef RZ_G2_BOARD_H
+#define RZ_G2_BOARD_H
+
+enum rzg2_board_id {
+	BOARD_HIHOPE_RZ_G2M = 0,
+	BOARD_UNKNOWN
+};
+
+#define BOARD_REV_UNKNOWN	(0xFFU)
+
+extern const char *g_board_tbl[];
+
+/************************************************************************
+ * Revisions are expressed in 8 bits.
+ *  The upper 4 bits are major version.
+ *  The lower 4 bits are minor version.
+ ************************************************************************/
+#define GET_BOARD_MAJOR(a)	((uint32_t)(a) >> 0x4)
+#define GET_BOARD_MINOR(a)	((uint32_t)(a) &  0xF)
+#define GET_BOARD_NAME(a)	(g_board_tbl[(a)])
+
+void rzg_get_board_type(uint32_t *type, uint32_t *rev);
+
+#endif /* RZ_G2_BOARD_H */