smbus.h

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#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 */