1 files changed, 34 insertions, 0 deletions
diff --git a/fw/fe310/bsp/include/sifive/devices/i2c.h b/fw/fe310/bsp/include/sifive/devices/i2c.h
new file mode 100644
index 0000000..900e238
--- /dev/null
+++ b/fw/fe310/bsp/include/sifive/devices/i2c.h
@@ -0,0 +1,34 @@
+// See LICENSE for license details.
+
+#ifndef _SIFIVE_I2C_H
+#define _SIFIVE_I2C_H
+
+/* Register offsets */
+
+#define I2C_PRESCALE_LOW   0x00
+#define I2C_PRESCALE_HIGH  0x04
+#define I2C_CONTROL        0x08
+#define I2C_TRANSMIT       0x0c
+#define I2C_RECEIVE        0x0c
+#define I2C_COMMAND        0x10
+#define I2C_STATUS         0x10
+
+/* Constants */
+
+#define I2C_CONTROL_EN      (1UL << 7)
+#define I2C_CONTROL_IE      (1UL << 6)
+#define I2C_WRITE           (0UL << 0)
+#define I2C_READ            (1UL << 0)
+#define I2C_CMD_START       (1UL << 7)
+#define I2C_CMD_STOP        (1UL << 6)
+#define I2C_CMD_READ        (1UL << 5)
+#define I2C_CMD_WRITE       (1UL << 4)
+#define I2C_CMD_ACK         (1UL << 3)
+#define I2C_CMD_IACK        (1UL << 0)
+#define I2C_STATUS_RXACK    (1UL << 7)
+#define I2C_STATUS_BUSY     (1UL << 6)
+#define I2C_STATUS_AL       (1UL << 5)
+#define I2C_STATUS_TIP      (1UL << 1)
+#define I2C_STATUS_IP       (1UL << 0)
+
+#endif /* _SIFIVE_I2C_H */