/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef DEVICE_SMBUS_H
#define DEVICE_SMBUS_H

#include <stdint.h>
#include <device/device.h>
#include <device/i2c_bus.h>

/* Common SMBus bus operations */
struct smbus_bus_operations {
	int (*recv_byte)(struct device *dev);
	int (*send_byte)(struct device *dev, u8 value);
	int (*read_byte)(struct device *dev, u8 addr);
	int (*write_byte)(struct device *dev, u8 addr, u8 value);
	int (*block_read)(struct device *dev, u8 cmd, u8 bytes, u8 *buffer);
	int (*block_write)(struct device *dev, u8 cmd, u8 bytes,
			   const u8 *buffer);
};

static inline const struct smbus_bus_operations *ops_smbus_bus(struct bus *bus)
{
	const struct smbus_bus_operations *bops;

	bops = 0;
	if (bus && bus->dev && bus->dev->ops)
		bops = bus->dev->ops->ops_smbus_bus;

	return bops;
}

struct bus *get_pbus_smbus(struct device *dev);

#if !DEVTREE_EARLY
static inline int smbus_recv_byte(struct device *const dev)
{
	return i2c_dev_readb(dev);
}

static inline int smbus_send_byte(struct device *const dev, u8 byte)
{
	return i2c_dev_writeb(dev, byte);
}

static inline int smbus_read_byte(struct device *const dev, u8 addr)
{
	return i2c_dev_readb_at(dev, addr);
}

static inline int smbus_write_byte(struct device *const dev, u8 addr, u8 val)
{
	return i2c_dev_writeb_at(dev, addr, val);
}

int smbus_block_read(struct device *dev, u8 cmd, u8 bytes, u8 *buffer);
int smbus_block_write(struct device *dev, u8 cmd, u8 bytes, const u8 *buffer);
#endif

#endif /* DEVICE_SMBUS_H */