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// 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 */
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