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 (file)
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;
+}

diff --git a/drivers/renesas/rcar/board/board.h b/drivers/renesas/rcar/board/board.h
new file mode 100644 (file)
index 0000000..15d80b9
--- /dev/null
+++ b/drivers/renesas/rcar/board/board.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights
+ * reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#define BOARD_SALVATOR_X               (0x00)
+#define BOARD_KRIEK                    (0x01)
+#define BOARD_STARTER_KIT              (0x02)
+#define BOARD_SALVATOR_XS              (0x04)
+#define BOARD_EBISU                    (0x08)
+#define BOARD_STARTER_KIT_PRE          (0x0B)
+#define BOARD_EBISU_4D                 (0x0DU)
+#define BOARD_UNKNOWN                  (BOARD_EBISU_4D + 1U)
+
+#define BOARD_REV_UNKNOWN              (0xFF)
+
+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)])
+
+int32_t rcar_get_board_type(uint32_t *type, uint32_t *rev);
+
+#endif