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-rw-r--r--arch/arm/include/asm/arch-sunxi/rsb.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-sunxi/rsb.h b/arch/arm/include/asm/arch-sunxi/rsb.h
new file mode 100644
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--- /dev/null
+++ b/arch/arm/include/asm/arch-sunxi/rsb.h
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+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Based on allwinner u-boot sources rsb code which is:
+ * (C) Copyright 2007-2013
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ * lixiang <lixiang@allwinnertech.com>
+ */
+
+#ifndef __SUNXI_RSB_H
+#define __SUNXI_RSB_H
+
+#include <common.h>
+#include <asm/io.h>
+
+struct sunxi_rsb_reg {
+ u32 ctrl; /* 0x00 */
+ u32 ccr; /* 0x04 */
+ u32 inte; /* 0x08 */
+ u32 stat; /* 0x0c */
+ u32 addr; /* 0x10 */
+ u8 res0[8]; /* 0x14 */
+ u32 data; /* 0x1c */
+ u8 res1[4]; /* 0x20 */
+ u32 lcr; /* 0x24 */
+ u32 dmcr; /* 0x28 */
+ u32 cmd; /* 0x2c */
+ u32 devaddr; /* 0x30 */
+};
+
+#define RSB_CTRL_SOFT_RST (1 << 0)
+#define RSB_CTRL_START_TRANS (1 << 7)
+
+#define RSB_STAT_TOVER_INT (1 << 0)
+#define RSB_STAT_TERR_INT (1 << 1)
+#define RSB_STAT_LBSY_INT (1 << 2)
+
+#define RSB_DMCR_DEVICE_MODE_DATA 0x7c3e00
+#define RSB_DMCR_DEVICE_MODE_START (1 << 31)
+
+#define RSB_CMD_BYTE_WRITE 0x4e
+#define RSB_CMD_BYTE_READ 0x8b
+#define RSB_CMD_SET_RTSADDR 0xe8
+
+#define RSB_DEVADDR_RUNTIME_ADDR(x) ((x) << 16)
+#define RSB_DEVADDR_DEVICE_ADDR(x) ((x) << 0)
+
+int rsb_init(void);
+int rsb_set_device_address(u16 device_addr, u16 runtime_addr);
+int rsb_write(const u16 runtime_device_addr, const u8 reg_addr, u8 data);
+int rsb_read(const u16 runtime_device_addr, const u8 reg_addr, u8 *data);
+
+#endif