I3C In-Band Interrupts

I3C In-Band Interrupts. More...

Data Structures
struct	i3c_ibi
	Struct for IBI request. More...
struct	i3c_ibi_payload
	Structure of payload buffer for IBI. More...
struct	i3c_ibi_work
	Node about a queued IBI. More...

Macros
#define	CONFIG_I3C_IBI_MAX_PAYLOAD_SIZE   0

Typedefs
typedef int(*	i3c_target_ibi_cb_t) (struct i3c_device_desc *target, struct i3c_ibi_payload *payload)
	Function called when In-Band Interrupt received from target device.

Enumerations
enum	i3c_ibi_type {   I3C_IBI_TARGET_INTR , I3C_IBI_CONTROLLER_ROLE_REQUEST , I3C_IBI_HOTJOIN , I3C_IBI_TYPE_MAX = I3C_IBI_HOTJOIN ,   I3C_IBI_WORKQUEUE_CB }
	IBI Types. More...

Functions
static int	i3c_ibi_raise (const struct device *dev, struct i3c_ibi *request)
	Raise an In-Band Interrupt (IBI).
static int	i3c_ibi_enable (struct i3c_device_desc *target)
	Enable IBI of a target device.
static int	i3c_ibi_disable (struct i3c_device_desc *target)
	Disable IBI of a target device.
static int	i3c_ibi_has_payload (struct i3c_device_desc *target)
	Check if target's IBI has payload.
static int	i3c_device_is_ibi_capable (struct i3c_device_desc *target)
	Check if device is IBI capable.
int	i3c_ibi_work_enqueue (struct i3c_ibi_work *ibi_work)
	Queue an IBI work item for future processing.
int	i3c_ibi_work_enqueue_target_irq (struct i3c_device_desc *target, uint8_t *payload, size_t payload_len)
	Queue a target interrupt IBI for future processing.
int	i3c_ibi_work_enqueue_hotjoin (const struct device *dev)
	Queue a hot join IBI for future processing.
int	i3c_ibi_work_enqueue_cb (const struct device *dev, k_work_handler_t work_cb)
	Queue a generic callback for future processing.

Detailed Description

I3C In-Band Interrupts.

Macro Definition Documentation

CONFIG_I3C_IBI_MAX_PAYLOAD_SIZE

#define CONFIG_I3C_IBI_MAX_PAYLOAD_SIZE   0

#include <zephyr/drivers/i3c/ibi.h>

Typedef Documentation

i3c_target_ibi_cb_t

typedef int(* i3c_target_ibi_cb_t) (struct i3c_device_desc *target, struct i3c_ibi_payload *payload)

#include <zephyr/drivers/i3c/ibi.h>

Function called when In-Band Interrupt received from target device.

This function is invoked by the controller when the controller receives an In-Band Interrupt from the target device.

A success return shall cause the controller to ACK the next byte received. An error return shall cause the controller to NACK the next byte received.

Parameters

target	the device description structure associated with the device to which the operation is addressed.
payload	Payload associated with the IBI. NULL if there is no payload.

Returns

0 if the IBI is accepted, or a negative error code.

Enumeration Type Documentation

i3c_ibi_type

enum i3c_ibi_type

#include <zephyr/drivers/i3c/ibi.h>

IBI Types.

Enumerator
I3C_IBI_TARGET_INTR	Target interrupt.
I3C_IBI_CONTROLLER_ROLE_REQUEST	Controller Role Request.
I3C_IBI_HOTJOIN	Hot Join Request.
I3C_IBI_TYPE_MAX
I3C_IBI_WORKQUEUE_CB	Not an actual IBI type, but simply used by the IBI workq for generic callbacks.

Function Documentation

i3c_device_is_ibi_capable()

static int i3c_device_is_ibi_capable ( struct i3c_device_desc *  target )

inlinestatic

#include <zephyr/drivers/i3c.h>

Check if device is IBI capable.

This reads the BCR from the device descriptor struct to determine whether device is capable of IBI.

Note that BCR must have been obtained from device and

See also

i3c_device_desc::bcr must be set.

Returns

True if IBI has payload, false otherwise.

i3c_ibi_disable()

static int i3c_ibi_disable ( struct i3c_device_desc *  target )

inlinestatic

#include <zephyr/drivers/i3c.h>

Disable IBI of a target device.

This enables IBI of a target device where the IBI has already been request.

Parameters

target

I3C target device descriptor.

Return values

0	If successful.
-EIO	General Input / output error.
-ENODEV	If IBI is not previously enabled for target.

i3c_ibi_enable()

static int i3c_ibi_enable ( struct i3c_device_desc *  target )

inlinestatic

#include <zephyr/drivers/i3c.h>

Enable IBI of a target device.

This enables IBI of a target device where the IBI has already been request.

Parameters

target

I3C target device descriptor.

Return values

0	If successful.
-EIO	General Input / output error.
-ENOMEM	If these is no more empty entries in the controller's IBI table (if the controller uses such table).

i3c_ibi_has_payload()

static int i3c_ibi_has_payload ( struct i3c_device_desc *  target )

inlinestatic

#include <zephyr/drivers/i3c.h>

Check if target's IBI has payload.

This reads the BCR from the device descriptor struct to determine whether IBI from device has payload.

Note that BCR must have been obtained from device and

See also

i3c_device_desc::bcr must be set.

Returns

True if IBI has payload, false otherwise.

i3c_ibi_raise()

static int i3c_ibi_raise ( const struct device *  dev, struct i3c_ibi *  request  )

inlinestatic

#include <zephyr/drivers/i3c.h>

Raise an In-Band Interrupt (IBI).

This raises an In-Band Interrupt (IBI) to the active controller.

Parameters

dev	Pointer to controller device driver instance.
request	Pointer to the IBI request struct.

Return values

0	if operation is successful.
-EIO	General input / output error.

i3c_ibi_work_enqueue()

int i3c_ibi_work_enqueue

(

struct i3c_ibi_work *

ibi_work

)

#include <zephyr/drivers/i3c/ibi.h>

Queue an IBI work item for future processing.

This queues up an IBI work item in the IBI workqueue for future processing.

Note that this will copy the ibi_work struct into internal structure. If there is not enough space to copy the ibi_work struct, this returns -ENOMEM.

Parameters

ibi_work

Pointer to the IBI work item struct.

Return values

0	If work item is successfully queued.
-ENOMEM	If no more free internal node to store IBI work item.
Others

See also

k_work_submit_to_queue

i3c_ibi_work_enqueue_cb()

int i3c_ibi_work_enqueue_cb	(	const struct device *	dev,
		k_work_handler_t	work_cb
	)

#include <zephyr/drivers/i3c/ibi.h>

Queue a generic callback for future processing.

This queues up a generic callback in the IBI workqueue for future processing.

Parameters

dev	Pointer to controller device driver instance.
work_cb	Callback function.

Return values

0	If work item is successfully queued.
-ENOMEM	If no more free internal node to store IBI work item.
Others

See also

k_work_submit_to_queue

i3c_ibi_work_enqueue_hotjoin()

int i3c_ibi_work_enqueue_hotjoin

(

const struct device *

dev

)

#include <zephyr/drivers/i3c/ibi.h>

Queue a hot join IBI for future processing.

This queues up a hot join IBI in the IBI workqueue for future processing.

Parameters

dev	Pointer to controller device driver instance.

Return values

0	If work item is successfully queued.
-ENOMEM	If no more free internal node to store IBI work item.
Others

See also

k_work_submit_to_queue

i3c_ibi_work_enqueue_target_irq()

int i3c_ibi_work_enqueue_target_irq	(	struct i3c_device_desc *	target,
		uint8_t *	payload,
		size_t	payload_len
	)

#include <zephyr/drivers/i3c/ibi.h>

Queue a target interrupt IBI for future processing.

This queues up a target interrupt IBI in the IBI workqueue for future processing.

Parameters

target	Pointer to target device descriptor.
payload	Pointer to IBI payload byte array.
payload_len	Length of payload byte array.

Return values

0	If work item is successfully queued.
-ENOMEM	If no more free internal node to store IBI work item.
Others

See also

k_work_submit_to_queue