rcar_gen3: drivers: board identification
Signed-off-by: ldts <jramirez@baylibre.com>
diff --git a/drivers/renesas/rcar/board/board.c b/drivers/renesas/rcar/board/board.c
new file mode 100644
index 0000000..147a0b0
--- /dev/null
+++ b/drivers/renesas/rcar/board/board.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights
+ * reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+#include <iic_dvfs.h>
+#include "board.h"
+#include "utils_def.h"
+
+#ifndef BOARD_DEFAULT
+#if (RCAR_LSI == RCAR_E3)
+#define BOARD_DEFAULT (BOARD_EBISU << BOARD_CODE_SHIFT)
+#else
+#define BOARD_DEFAULT (BOARD_SALVATOR_X << BOARD_CODE_SHIFT)
+#endif
+#endif
+
+#define BOARD_CODE_MASK (0xF8)
+#define BOARD_REV_MASK (0x07)
+#define BOARD_CODE_SHIFT (0x03)
+#define BOARD_ID_UNKNOWN (0xFF)
+
+#define SXS_ID { 0x10U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+#define SX_ID { 0x10U, 0x11U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+#define SKP_ID { 0x10U, 0x10U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+#define SK_ID { 0x10U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+#define EB4_ID { 0x10U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+#define EB_ID { 0x10U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+#define KK_ID { 0x10U, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU }
+
+const char *g_board_tbl[] = {
+ [BOARD_STARTER_KIT_PRE] = "Starter Kit Premier",
+ [BOARD_STARTER_KIT] = "Starter Kit",
+ [BOARD_SALVATOR_XS] = "Salvator-XS",
+ [BOARD_SALVATOR_X] = "Salvator-X",
+ [BOARD_EBISU_4D] = "Ebisu-4D",
+ [BOARD_KRIEK] = "Kriek",
+ [BOARD_EBISU] = "Ebisu",
+ [BOARD_UNKNOWN] = "unknown"
+};
+
+int32_t rcar_get_board_type(uint32_t *type, uint32_t *rev)
+{
+ int32_t ret = 0;
+ const uint8_t board_tbl[][8] = {
+ [BOARD_STARTER_KIT_PRE] = SKP_ID,
+ [BOARD_SALVATOR_XS] = SXS_ID,
+ [BOARD_STARTER_KIT] = SK_ID,
+ [BOARD_SALVATOR_X] = SX_ID,
+ [BOARD_EBISU_4D] = EB4_ID,
+ [BOARD_EBISU] = EB_ID,
+ [BOARD_KRIEK] = KK_ID,
+ };
+ static uint8_t board_id = BOARD_ID_UNKNOWN;
+
+ if (board_id != BOARD_ID_UNKNOWN)
+ goto get_type;
+
+#if PMIC_ROHM_BD9571
+ /* Board ID detection from EEPROM */
+ ret = rcar_iic_dvfs_receive(EEPROM, BOARD_ID, &board_id);
+ if (ret) {
+ board_id = BOARD_ID_UNKNOWN;
+ goto get_type;
+ }
+
+ if (board_id == BOARD_ID_UNKNOWN)
+ board_id = BOARD_DEFAULT;
+#else
+ board_id = BOARD_DEFAULT;
+#endif
+
+get_type:
+ *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;
+ return ret;
+ }
+
+ *rev = board_tbl[*type][(uint8_t) (board_id & BOARD_REV_MASK)];
+
+ return ret;
+}