diff --git a/plat/brcm/board/stingray/include/sdio.h b/plat/brcm/board/stingray/include/sdio.h
new file mode 100644
index 0000000..e08904e
--- /dev/null
+++ b/plat/brcm/board/stingray/include/sdio.h
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2019-2020, Broadcom
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SDIO_H
+#define SDIO_H
+
+#include <stdbool.h>
+
+#define SR_IPROC_SDIO0_CFG_BASE      0x689006e4
+#define SR_IPROC_SDIO0_SID_BASE      0x68900b00
+#define SR_IPROC_SDIO0_PAD_BASE      0x68a4017c
+#define SR_IPROC_SDIO0_IOCTRL_BASE   0x68e02408
+
+#define SR_IPROC_SDIO1_CFG_BASE      0x68900734
+#define SR_IPROC_SDIO1_SID_BASE      0x68900b08
+#define SR_IPROC_SDIO1_PAD_BASE      0x68a401b4
+#define SR_IPROC_SDIO1_IOCTRL_BASE   0x68e03408
+
+#define NS3Z_IPROC_SDIO0_CFG_BASE    0x68a20540
+#define NS3Z_IPROC_SDIO0_SID_BASE    0x68900b00
+#define NS3Z_IPROC_SDIO0_TP_OUT_SEL  0x68a20308
+#define NS3Z_IPROC_SDIO0_PAD_BASE    0x68a20500
+#define NS3Z_IPROC_SDIO0_IOCTRL_BASE 0x68e02408
+
+#define PHY_BYPASS      BIT(14)
+#define LEGACY_EN       BIT(31)
+#define PHY_DISABLE     (LEGACY_EN | PHY_BYPASS)
+
+#define NS3Z_IPROC_SDIO1_CFG_BASE    0x68a30540
+#define NS3Z_IPROC_SDIO1_SID_BASE    0x68900b08
+#define NS3Z_IPROC_SDIO1_PAD_BASE    0x68a30500
+#define NS3Z_IPROC_SDIO1_IOCTRL_BASE 0x68e03408
+
+#define ICFG_SDIO_CAP0          0x10
+#define ICFG_SDIO_CAP1          0x14
+#define ICFG_SDIO_STRAPSTATUS_0 0x0
+#define ICFG_SDIO_STRAPSTATUS_1 0x4
+#define ICFG_SDIO_STRAPSTATUS_2 0x8
+#define ICFG_SDIO_STRAPSTATUS_3 0xc
+#define ICFG_SDIO_STRAPSTATUS_4 0x18
+
+#define ICFG_SDIO_SID_ARADDR    0x0
+#define ICFG_SDIO_SID_AWADDR    0x4
+
+#define ICFG_SDIOx_CAP0__SLOT_TYPE_MASK         0x3
+#define ICFG_SDIOx_CAP0__SLOT_TYPE_SHIFT        27
+#define ICFG_SDIOx_CAP0__INT_MODE_SHIFT         26
+#define ICFG_SDIOx_CAP0__SYS_BUS_64BIT_SHIFT    25
+#define ICFG_SDIOx_CAP0__VOLTAGE_1P8V_SHIFT     24
+#define ICFG_SDIOx_CAP0__VOLTAGE_3P0V_SHIFT     23
+#define ICFG_SDIOx_CAP0__VOLTAGE_3P3V_SHIFT     22
+#define ICFG_SDIOx_CAP0__SUSPEND_RESUME_SHIFT   21
+#define ICFG_SDIOx_CAP0__SDMA_SHIFT             20
+#define ICFG_SDIOx_CAP0__HIGH_SPEED_SHIFT       19
+#define ICFG_SDIOx_CAP0__ADMA2_SHIFT            18
+#define ICFG_SDIOx_CAP0__EXTENDED_MEDIA_SHIFT   17
+#define ICFG_SDIOx_CAP0__MAX_BLOCK_LEN_MASK     0x3
+#define ICFG_SDIOx_CAP0__MAX_BLOCK_LEN_SHIFT    15
+#define ICFG_SDIOx_CAP0__BASE_CLK_FREQ_MASK     0xff
+#define ICFG_SDIOx_CAP0__BASE_CLK_FREQ_SHIFT    7
+#define ICFG_SDIOx_CAP0__TIMEOUT_UNIT_SHIFT     6
+#define ICFG_SDIOx_CAP0__TIMEOUT_CLK_FREQ_MASK  0x3f
+#define ICFG_SDIOx_CAP0__TIMEOUT_CLK_FREQ_SHIFT 0
+
+#define ICFG_SDIOx_CAP1__SPI_BLOCK_MODE_SHIFT   22
+#define ICFG_SDIOx_CAP1__SPI_MODE_SHIFT         21
+#define ICFG_SDIOx_CAP1__CLK_MULT_MASK          0xff
+#define ICFG_SDIOx_CAP1__CLK_MULT_SHIFT         13
+#define ICFG_SDIOx_CAP1__RETUNING_MODE_MASK     0x3
+#define ICFG_SDIOx_CAP1__RETUNING_MODE_SHIFT    11
+#define ICFG_SDIOx_CAP1__TUNE_SDR50_SHIFT       10
+#define ICFG_SDIOx_CAP1__TIME_RETUNE_MASK       0xf
+#define ICFG_SDIOx_CAP1__TIME_RETUNE_SHIFT      6
+#define ICFG_SDIOx_CAP1__DRIVER_D_SHIFT         5
+#define ICFG_SDIOx_CAP1__DRIVER_C_SHIFT         4
+#define ICFG_SDIOx_CAP1__DRIVER_A_SHIFT         3
+#define ICFG_SDIOx_CAP1__DDR50_SHIFT            2
+#define ICFG_SDIOx_CAP1__SDR104_SHIFT           1
+#define ICFG_SDIOx_CAP1__SDR50_SHIFT            0
+
+#ifdef USE_DDR
+#define SDIO_DMA  1
+#else
+#define SDIO_DMA  0
+#endif
+
+#define SDIO0_CAP0_CFG  \
+	(0x1 << ICFG_SDIOx_CAP0__SLOT_TYPE_SHIFT) \
+	| (0x0 << ICFG_SDIOx_CAP0__INT_MODE_SHIFT) \
+	| (0x0 << ICFG_SDIOx_CAP0__SYS_BUS_64BIT_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__VOLTAGE_1P8V_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__VOLTAGE_3P0V_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__VOLTAGE_3P3V_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__SUSPEND_RESUME_SHIFT) \
+	| (SDIO_DMA << ICFG_SDIOx_CAP0__SDMA_SHIFT) \
+	| (SDIO_DMA << ICFG_SDIOx_CAP0__ADMA2_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__HIGH_SPEED_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__EXTENDED_MEDIA_SHIFT) \
+	| (0x2 << ICFG_SDIOx_CAP0__MAX_BLOCK_LEN_SHIFT) \
+	| (0xc8 << ICFG_SDIOx_CAP0__BASE_CLK_FREQ_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__TIMEOUT_UNIT_SHIFT) \
+	| (0x30 << ICFG_SDIOx_CAP0__TIMEOUT_CLK_FREQ_SHIFT)
+
+#define SDIO0_CAP1_CFG  \
+	(0x1 << ICFG_SDIOx_CAP1__SPI_BLOCK_MODE_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__SPI_MODE_SHIFT)\
+	| (0x0 << ICFG_SDIOx_CAP1__CLK_MULT_SHIFT)\
+	| (0x2 << ICFG_SDIOx_CAP1__RETUNING_MODE_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__TUNE_SDR50_SHIFT)\
+	| (0x0 << ICFG_SDIOx_CAP1__DRIVER_D_SHIFT)\
+	| (0x0 << ICFG_SDIOx_CAP1__DRIVER_C_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__DRIVER_A_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__DDR50_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__SDR104_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__SDR50_SHIFT)
+
+#define SDIO1_CAP0_CFG  \
+	(0x0 << ICFG_SDIOx_CAP0__SLOT_TYPE_SHIFT) \
+	| (0x0 << ICFG_SDIOx_CAP0__INT_MODE_SHIFT) \
+	| (0x0 << ICFG_SDIOx_CAP0__SYS_BUS_64BIT_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__VOLTAGE_1P8V_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__VOLTAGE_3P0V_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__VOLTAGE_3P3V_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__SUSPEND_RESUME_SHIFT) \
+	| (SDIO_DMA << ICFG_SDIOx_CAP0__SDMA_SHIFT) \
+	| (SDIO_DMA << ICFG_SDIOx_CAP0__ADMA2_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__HIGH_SPEED_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__EXTENDED_MEDIA_SHIFT) \
+	| (0x2 << ICFG_SDIOx_CAP0__MAX_BLOCK_LEN_SHIFT) \
+	| (0xc8 << ICFG_SDIOx_CAP0__BASE_CLK_FREQ_SHIFT) \
+	| (0x1 << ICFG_SDIOx_CAP0__TIMEOUT_UNIT_SHIFT) \
+	| (0x30 << ICFG_SDIOx_CAP0__TIMEOUT_CLK_FREQ_SHIFT)
+
+#define SDIO1_CAP1_CFG  \
+	(0x1 << ICFG_SDIOx_CAP1__SPI_BLOCK_MODE_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__SPI_MODE_SHIFT)\
+	| (0x0 << ICFG_SDIOx_CAP1__CLK_MULT_SHIFT)\
+	| (0x2 << ICFG_SDIOx_CAP1__RETUNING_MODE_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__TUNE_SDR50_SHIFT)\
+	| (0x0 << ICFG_SDIOx_CAP1__DRIVER_D_SHIFT)\
+	| (0x0 << ICFG_SDIOx_CAP1__DRIVER_C_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__DRIVER_A_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__DDR50_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__SDR104_SHIFT)\
+	| (0x1 << ICFG_SDIOx_CAP1__SDR50_SHIFT)
+
+#define PAD_SDIO_CLK      0x4
+#define PAD_SDIO_DATA0    0x8
+#define PAD_SDIO_DATA1    0xc
+#define PAD_SDIO_DATA2    0x10
+#define PAD_SDIO_DATA3    0x14
+#define PAD_SDIO_DATA4    0x18
+#define PAD_SDIO_DATA5    0x1c
+#define PAD_SDIO_DATA6    0x20
+#define PAD_SDIO_DATA7    0x24
+#define PAD_SDIO_CMD      0x28
+
+/* 12mA Drive strength*/
+#define PAD_SDIO_SELX     (0x5 << 1)
+#define PAD_SDIO_SRC      (1 << 0)
+#define PAD_SDIO_MASK     (0xF << 0)
+#define PAD_SDIO_VALUE    (PAD_SDIO_SELX | PAD_SDIO_SRC)
+
+/*
+ * SDIO_PRESETVAL0
+ *
+ * Each 13 Bit filed consists:
+ * drivestrength - 12:11
+ * clkgensel - b10
+ * sdkclkfreqsel - 9:0
+ * Field		Bit(s)		Description
+ * ============================================================
+ * SDR25_PRESET		25:13		Preset Value for SDR25
+ * SDR50_PRESET		12:0		Preset Value for SDR50
+ */
+#define SDIO_PRESETVAL0		0x01005001
+
+/*
+ * SDIO_PRESETVAL1
+ *
+ * Each 13 Bit filed consists:
+ * drivestrength - 12:11
+ * clkgensel - b10
+ * sdkclkfreqsel - 9:0
+ * Field		Bit(s)		Description
+ * ============================================================
+ * SDR104_PRESET		25:13		Preset Value for SDR104
+ * SDR12_PRESET		12:0		Preset Value for SDR12
+ */
+#define SDIO_PRESETVAL1		0x03000004
+
+/*
+ * SDIO_PRESETVAL2
+ *
+ * Each 13 Bit filed consists:
+ * drivestrength - 12:11
+ * clkgensel - b10
+ * sdkclkfreqsel - 9:0
+ * Field		Bit(s)		Description
+ * ============================================================
+ * HIGH_SPEED_PRESET	25:13		Preset Value for High Speed
+ * INIT_PRESET		12:0		Preset Value for Initialization
+ */
+#define SDIO_PRESETVAL2		0x010040FA
+
+/*
+ * SDIO_PRESETVAL3
+ *
+ * Each 13 Bit filed consists:
+ * drivestrength - 12:11
+ * clkgensel - b10
+ * sdkclkfreqsel - 9:0
+ * Field		Bit(s)		Description
+ * ============================================================
+ * DDR50_PRESET		25:13		Preset Value for DDR50
+ * DEFAULT_PRESET	12:0		Preset Value for Default Speed
+ */
+#define SDIO_PRESETVAL3		0x01004004
+
+/*
+ * SDIO_PRESETVAL4
+ *
+ * Field			Bit(s)		Description
+ * ============================================================
+ * FORCE_USE_IP_TUNE_CLK	30		Force use IP clock
+ * TUNING_COUNT			29:24		Tuning count
+ * OVERRIDE_1P8V		23:16
+ * OVERRIDE_3P3V		15:8
+ * OVERRIDE_3P0V		7:0
+ */
+#define SDIO_PRESETVAL4		0x20010101
+
+#define SDIO_SID_SHIFT		5
+
+typedef struct {
+	uintptr_t cfg_base;
+	uintptr_t sid_base;
+	uintptr_t io_ctrl_base;
+	uintptr_t pad_base;
+} SDIO_CFG;
+
+void brcm_stingray_sdio_init(void);
+
+#endif /* SDIO_H */