smbus.h File Reference

#include <zephyr/types.h>
#include <zephyr/device.h>
#include <zephyr/stats/stats.h>
#include <syscalls/smbus.h>

Go to the source code of this file.

Data Structures
struct	smbus_callback
	SMBus callback structure. More...
struct	smbus_dt_spec
	Complete SMBus DT information. More...

Macros
#define	SMBUS_BLOCK_BYTES_MAX   32
#define	SMBUS_DT_SPEC_GET(node_id)
	Structure initializer for smbus_dt_spec from devicetree. More...
#define	SMBUS_DT_SPEC_INST_GET(inst)   SMBUS_DT_SPEC_GET(DT_DRV_INST(inst))
	Structure initializer for smbus_dt_spec from devicetree instance. More...
#define	SMBUS_DEVICE_DT_DEFINE(node_id, init_fn, pm_device, data_ptr, cfg_ptr, level, prio, api_ptr, ...)
	Like DEVICE_DT_DEFINE() with SMBus specifics. More...
#define	SMBUS_DEVICE_DT_INST_DEFINE(inst, ...)    SMBUS_DEVICE_DT_DEFINE(DT_DRV_INST(inst), __VA_ARGS__)
	Like SMBUS_DEVICE_DT_DEFINE() for an instance of a DT_DRV_COMPAT compatible. More...
SMBus Protocol commands
SMBus Specification defines the following SMBus protocols operations
#define	SMBUS_CMD_QUICK   0b000
#define	SMBUS_CMD_BYTE   0b001
#define	SMBUS_CMD_BYTE_DATA   0b010
#define	SMBUS_CMD_WORD_DATA   0b011
#define	SMBUS_CMD_PROC_CALL   0b100
#define	SMBUS_CMD_BLOCK   0b101
#define	SMBUS_CMD_BLOCK_PROC   0b111
SMBus device functionality
The following parameters describe the functionality of the SMBus device
#define	SMBUS_MODE_CONTROLLER   BIT(0)
#define	SMBUS_MODE_PEC   BIT(1)
#define	SMBUS_MODE_HOST_NOTIFY   BIT(2)
#define	SMBUS_MODE_SMBALERT   BIT(3)
SMBus special reserved addresses
The following addresses are reserved by SMBus specification
#define	SMBUS_ADDRESS_ARA   0x0c
	Alert Response Address (ARA) More...

Typedefs
typedef void(*	smbus_callback_handler_t) (const struct device *dev, struct smbus_callback *cb, uint8_t addr)
	Define SMBus callback handler function signature. More...

Enumerations
SMBus read / write direction
enum	smbus_direction { SMBUS_MSG_WRITE = 0 , SMBUS_MSG_READ = 1 }
	SMBus read / write direction. More...

Functions
static void	smbus_xfer_stats (const struct device *dev, uint8_t sent, uint8_t recv)
	Updates the SMBus stats. More...
int	smbus_configure (const struct device *dev, uint32_t dev_config)
	Configure operation of a SMBus host controller. More...
int	smbus_get_config (const struct device *dev, uint32_t *dev_config)
	Get configuration of a SMBus host controller. More...
int	smbus_smbalert_set_cb (const struct device *dev, struct smbus_callback *cb)
	Add SMBUSALERT callback for a SMBus host controller. More...
int	smbus_smbalert_remove_cb (const struct device *dev, struct smbus_callback *cb)
	Remove SMBUSALERT callback from a SMBus host controller. More...
int	smbus_host_notify_set_cb (const struct device *dev, struct smbus_callback *cb)
	Add Host Notify callback for a SMBus host controller. More...
int	smbus_host_notify_remove_cb (const struct device *dev, struct smbus_callback *cb)
	Remove Host Notify callback from a SMBus host controller. More...
int	smbus_quick (const struct device *dev, uint16_t addr, enum smbus_direction direction)
	Perform SMBus Quick operation. More...
int	smbus_byte_write (const struct device *dev, uint16_t addr, uint8_t byte)
	Perform SMBus Byte Write operation. More...
int	smbus_byte_read (const struct device *dev, uint16_t addr, uint8_t *byte)
	Perform SMBus Byte Read operation. More...
int	smbus_byte_data_write (const struct device *dev, uint16_t addr, uint8_t cmd, uint8_t byte)
	Perform SMBus Byte Data Write operation. More...
int	smbus_byte_data_read (const struct device *dev, uint16_t addr, uint8_t cmd, uint8_t *byte)
	Perform SMBus Byte Data Read operation. More...
int	smbus_word_data_write (const struct device *dev, uint16_t addr, uint8_t cmd, uint16_t word)
	Perform SMBus Word Data Write operation. More...
int	smbus_word_data_read (const struct device *dev, uint16_t addr, uint8_t cmd, uint16_t *word)
	Perform SMBus Word Data Read operation. More...
int	smbus_pcall (const struct device *dev, uint16_t addr, uint8_t cmd, uint16_t send_word, uint16_t *recv_word)
	Perform SMBus Process Call operation. More...
int	smbus_block_write (const struct device *dev, uint16_t addr, uint8_t cmd, uint8_t count, uint8_t *buf)
	Perform SMBus Block Write operation. More...
int	smbus_block_read (const struct device *dev, uint16_t addr, uint8_t cmd, uint8_t *count, uint8_t *buf)
	Perform SMBus Block Read operation. More...
int	smbus_block_pcall (const struct device *dev, uint16_t addr, uint8_t cmd, uint8_t snd_count, uint8_t *snd_buf, uint8_t *rcv_count, uint8_t *rcv_buf)
	Perform SMBus Block Process Call operation. More...