UART Device Interface Functions More...

#include <stdbool.h>
#include <stdint.h>
#include "sw/device/lib/base/macros.h"
#include "sw/device/lib/base/mmio.h"
#include "sw/device/lib/dif/dif_base.h"
#include "dt/dt_uart.h"

Go to the source code of this file.

Data Structures
struct	dif_uart
	A handle to uart. More...

Macros
#define	kDifUartIrqTxWatermark kDtUartIrqTxWatermark
	A uart interrupt request type.

#define	kDifUartIrqRxWatermark kDtUartIrqRxWatermark
	Raised if the receive FIFO is past the high-water mark.

#define	kDifUartIrqTxDone kDtUartIrqTxDone
	Raised if the transmit FIFO has emptied and no transmit is ongoing.

#define	kDifUartIrqRxOverflow kDtUartIrqRxOverflow
	Raised if the receive FIFO has overflowed.

#define	kDifUartIrqRxFrameErr kDtUartIrqRxFrameErr
	Raised if a framing error has been detected on receive.

#define	kDifUartIrqRxBreakErr kDtUartIrqRxBreakErr
	Raised if break condition has been detected on receive.

#define	kDifUartIrqRxTimeout kDtUartIrqRxTimeout
	Raised if RX FIFO has characters remaining in the FIFO without being retrieved for the programmed time period.

#define	kDifUartIrqRxParityErr kDtUartIrqRxParityErr
	Raised if the receiver has detected a parity error.

#define	kDifUartIrqTxEmpty kDtUartIrqTxEmpty
	Raised if the transmit FIFO is empty.

Typedefs
typedef struct dif_uart	dif_uart_t
	A handle to uart.

typedef enum dif_uart_alert	dif_uart_alert_t
	A uart alert type.

typedef dt_uart_irq_t	dif_uart_irq_t

typedef uint32_t	dif_uart_irq_state_snapshot_t
	A snapshot of the state of the interrupts for this IP.

typedef uint32_t	dif_uart_irq_enable_snapshot_t
	A snapshot of the enablement state of the interrupts for this IP.

Enumerations
enum	dif_uart_alert { kDifUartAlertFatalFault = 0 }
	A uart alert type. More...

Functions
OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_init (mmio_region_t base_addr, dif_uart_t *uart)
	Creates a new handle for a(n) uart peripheral.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_init_from_dt (dt_uart_t dt, dif_uart_t *uart)
	Creates a new handle for a(n) uart peripheral.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_get_dt (const dif_uart_t uart, dt_uart_t dt)
	Get the DT handle from this DIF.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_alert_force (const dif_uart_t *uart, dif_uart_alert_t alert)
	Forces a particular alert, causing it to be escalated as if the hardware had raised it.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_get_type (const dif_uart_t uart, dif_uart_irq_t, dif_irq_type_t type)
	Returns the type of a given interrupt (i.e., event or status) for this IP.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_get_state (const dif_uart_t uart, dif_uart_irq_state_snapshot_t snapshot)
	Returns the state of all interrupts (i.e., pending or not) for this IP.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_is_pending (const dif_uart_t uart, dif_uart_irq_t, bool is_pending)
	Returns whether a particular interrupt is currently pending.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_acknowledge_state (const dif_uart_t *uart, dif_uart_irq_state_snapshot_t snapshot)
	Acknowledges all interrupts that were pending at the time of the state snapshot.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_acknowledge_all (const dif_uart_t *uart)
	Acknowledges all interrupts, indicating to the hardware that all interrupts have been successfully serviced.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_acknowledge (const dif_uart_t *uart, dif_uart_irq_t)
	Acknowledges a particular interrupt, indicating to the hardware that it has been successfully serviced.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_force (const dif_uart_t *uart, dif_uart_irq_t, const bool val)
	Forces a particular interrupt, causing it to be serviced as if hardware had asserted it.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_get_enabled (const dif_uart_t uart, dif_uart_irq_t, dif_toggle_t state)
	Checks whether a particular interrupt is currently enabled or disabled.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_set_enabled (const dif_uart_t *uart, dif_uart_irq_t, dif_toggle_t state)
	Sets whether a particular interrupt is currently enabled or disabled.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_disable_all (const dif_uart_t uart, dif_uart_irq_enable_snapshot_t snapshot)
	Disables all interrupts, optionally snapshotting all enable states for later restoration.

OT_WARN_UNUSED_RESULT dif_result_t	dif_uart_irq_restore_all (const dif_uart_t uart, const dif_uart_irq_enable_snapshot_t snapshot)
	Restores interrupts from the given (enable) snapshot.

Detailed Description

UART Device Interface Functions

Definition in file dif_uart_autogen.h.

Data Structure Documentation

◆ dif_uart

struct dif_uart

A handle to uart.

This type should be treated as opaque by users.

Definition at line 37 of file dif_uart_autogen.h.

Data Fields
mmio_region_t	base_addr	The base address for the uart hardware registers.
dt_uart_t	dt	The instance, set to `kDtUartCount` if not initialized through `dif_uart_init_from_dt`.

Macro Definition Documentation

◆ kDifUartIrqRxBreakErr

#define kDifUartIrqRxBreakErr kDtUartIrqRxBreakErr

Raised if break condition has been detected on receive.

Definition at line 154 of file dif_uart_autogen.h.

◆ kDifUartIrqRxFrameErr

#define kDifUartIrqRxFrameErr kDtUartIrqRxFrameErr

Raised if a framing error has been detected on receive.

Definition at line 150 of file dif_uart_autogen.h.

◆ kDifUartIrqRxOverflow

#define kDifUartIrqRxOverflow kDtUartIrqRxOverflow

Raised if the receive FIFO has overflowed.

Definition at line 146 of file dif_uart_autogen.h.

◆ kDifUartIrqRxParityErr

#define kDifUartIrqRxParityErr kDtUartIrqRxParityErr

Raised if the receiver has detected a parity error.

Definition at line 162 of file dif_uart_autogen.h.

◆ kDifUartIrqRxTimeout

#define kDifUartIrqRxTimeout kDtUartIrqRxTimeout

Raised if RX FIFO has characters remaining in the FIFO without being retrieved for the programmed time period.

Definition at line 158 of file dif_uart_autogen.h.

◆ kDifUartIrqRxWatermark

#define kDifUartIrqRxWatermark kDtUartIrqRxWatermark

Raised if the receive FIFO is past the high-water mark.

Definition at line 138 of file dif_uart_autogen.h.

◆ kDifUartIrqTxDone

#define kDifUartIrqTxDone kDtUartIrqTxDone

Raised if the transmit FIFO has emptied and no transmit is ongoing.

Definition at line 142 of file dif_uart_autogen.h.

◆ kDifUartIrqTxEmpty

#define kDifUartIrqTxEmpty kDtUartIrqTxEmpty

Raised if the transmit FIFO is empty.

Definition at line 166 of file dif_uart_autogen.h.

◆ kDifUartIrqTxWatermark

#define kDifUartIrqTxWatermark kDtUartIrqTxWatermark

A uart interrupt request type.

DEPRECATED Use dt_uart_irq_t instead. This enumeration exists solely for the transition to dt-based interrupt numbers and will be removed in the future.

The following are defines to keep the types consistent with DT. Raised if the transmit FIFO is past the high-water mark.

Definition at line 134 of file dif_uart_autogen.h.

Typedef Documentation

◆ dif_uart_irq_enable_snapshot_t

typedef uint32_t dif_uart_irq_enable_snapshot_t

A snapshot of the enablement state of the interrupts for this IP.

This is an opaque type, to be used with the dif_uart_irq_disable_all() and dif_uart_irq_restore_all() functions.

Definition at line 276 of file dif_uart_autogen.h.

◆ dif_uart_irq_state_snapshot_t

typedef uint32_t dif_uart_irq_state_snapshot_t

A snapshot of the state of the interrupts for this IP.

This is an opaque type, to be used with the dif_uart_irq_get_state() and dif_uart_irq_acknowledge_state() functions.

Definition at line 174 of file dif_uart_autogen.h.

◆ dif_uart_irq_t

typedef dt_uart_irq_t dif_uart_irq_t

Definition at line 120 of file dif_uart_autogen.h.

◆ dif_uart_t

typedef struct dif_uart dif_uart_t

A handle to uart.

This type should be treated as opaque by users.

Enumeration Type Documentation

◆ dif_uart_alert

enum dif_uart_alert

A uart alert type.

Enumerator
kDifUartAlertFatalFault	This fatal alert is triggered when a fatal TL-UL bus integrity fault is detected.

Definition at line 98 of file dif_uart_autogen.h.

Function Documentation

◆ dif_uart_alert_force()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_alert_force	(	const dif_uart_t *	uart,
		dif_uart_alert_t	alert )

Forces a particular alert, causing it to be escalated as if the hardware had raised it.

Parameters

uart	A uart handle.
alert	The alert to force.

Returns: The result of the operation.

Definition at line 62 of file dif_uart_autogen.c.

◆ dif_uart_get_dt()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_get_dt	(	const dif_uart_t *	uart,
		dt_uart_t *	dt )

Get the DT handle from this DIF.

If this DIF was initialized by dif_uart_init_from_dt(dt, ..) then this function will return dt. Otherwise it will return an error.

Parameters

	uart	A uart handle.
[out]	dt	DT handle.

Returns: kDifBadArg if the DIF has no DT information, kDifOk otherwise.

Definition at line 52 of file dif_uart_autogen.c.

◆ dif_uart_init()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_init	(	mmio_region_t	base_addr,
		dif_uart_t *	uart )

Creates a new handle for a(n) uart peripheral.

This function does not actuate the hardware.

Parameters

	base_addr	The MMIO base address of the uart peripheral.
[out]	uart	Out param for the initialized handle.

Returns: The result of the operation.

DEPRECATED This function exists solely for the transition to dt-based DIFs and will be removed in the future.

Definition at line 25 of file dif_uart_autogen.c.

◆ dif_uart_init_from_dt()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_init_from_dt	(	dt_uart_t	dt,
		dif_uart_t *	uart )

Creates a new handle for a(n) uart peripheral.

This function does not actuate the hardware.

Parameters

	dt	The devicetable description of the device.
[out]	uart	Out param for the initialized handle.

Returns: The result of the operation.

Definition at line 39 of file dif_uart_autogen.c.

◆ dif_uart_irq_acknowledge()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_acknowledge	(	const dif_uart_t *	uart,
		dif_uart_irq_t	irq )

Acknowledges a particular interrupt, indicating to the hardware that it has been successfully serviced.

Parameters

uart	A uart handle.
irq	An interrupt request.

Returns: The result of the operation.

Definition at line 241 of file dif_uart_autogen.c.

◆ dif_uart_irq_acknowledge_all()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_acknowledge_all ( const dif_uart_t * uart )

Acknowledges all interrupts, indicating to the hardware that all interrupts have been successfully serviced.

Parameters

uart	A uart handle.

Returns: The result of the operation.

Definition at line 222 of file dif_uart_autogen.c.

◆ dif_uart_irq_acknowledge_state()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_acknowledge_state	(	const dif_uart_t *	uart,
		dif_uart_irq_state_snapshot_t	snapshot )

Acknowledges all interrupts that were pending at the time of the state snapshot.

Parameters

uart	A uart handle.
snapshot	Interrupt state snapshot.

Returns: The result of the operation.

Definition at line 180 of file dif_uart_autogen.c.

◆ dif_uart_irq_disable_all()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_disable_all	(	const dif_uart_t *	uart,
		dif_uart_irq_enable_snapshot_t *	snapshot )

Disables all interrupts, optionally snapshotting all enable states for later restoration.

Parameters

	uart	A uart handle.
[out]	snapshot	Out-param for the snapshot; may be `NULL`.

Returns: The result of the operation.

Definition at line 349 of file dif_uart_autogen.c.

◆ dif_uart_irq_force()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_force	(	const dif_uart_t *	uart,
		dif_uart_irq_t	irq,
		const bool	val )

Forces a particular interrupt, causing it to be serviced as if hardware had asserted it.

Parameters

uart	A uart handle.
irq	An interrupt request.
val	Value to be set.

Returns: The result of the operation.

Definition at line 266 of file dif_uart_autogen.c.

◆ dif_uart_irq_get_enabled()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_get_enabled	(	const dif_uart_t *	uart,
		dif_uart_irq_t	irq,
		dif_toggle_t *	state )

Checks whether a particular interrupt is currently enabled or disabled.

Parameters

	uart	A uart handle.
	irq	An interrupt request.
[out]	state	Out-param toggle state of the interrupt.

Returns: The result of the operation.

Definition at line 291 of file dif_uart_autogen.c.

◆ dif_uart_irq_get_state()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_get_state	(	const dif_uart_t *	uart,
		dif_uart_irq_state_snapshot_t *	snapshot )

Returns the state of all interrupts (i.e., pending or not) for this IP.

Parameters

	uart	A uart handle.
[out]	snapshot	Out-param for interrupt state snapshot.

Returns: The result of the operation.

Definition at line 163 of file dif_uart_autogen.c.

◆ dif_uart_irq_get_type()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_get_type	(	const dif_uart_t *	uart,
		dif_uart_irq_t	irq,
		dif_irq_type_t *	type )

Returns the type of a given interrupt (i.e., event or status) for this IP.

Parameters

	uart	A uart handle.
	irq	An interrupt request.
[out]	type	Out-param for the interrupt type.

Returns: The result of the operation.

Definition at line 144 of file dif_uart_autogen.c.

◆ dif_uart_irq_is_pending()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_is_pending	(	const dif_uart_t *	uart,
		dif_uart_irq_t	irq,
		bool *	is_pending )

Returns whether a particular interrupt is currently pending.

Parameters

	uart	A uart handle.
	irq	An interrupt request.
[out]	is_pending	Out-param for whether the interrupt is pending.

Returns: The result of the operation.

Definition at line 197 of file dif_uart_autogen.c.

◆ dif_uart_irq_restore_all()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_restore_all	(	const dif_uart_t *	uart,
		const dif_uart_irq_enable_snapshot_t *	snapshot )

Restores interrupts from the given (enable) snapshot.

Parameters

uart	A uart handle.
snapshot	A snapshot to restore from.

Returns: The result of the operation.

Definition at line 376 of file dif_uart_autogen.c.

◆ dif_uart_irq_set_enabled()

OT_WARN_UNUSED_RESULT dif_result_t dif_uart_irq_set_enabled	(	const dif_uart_t *	uart,
		dif_uart_irq_t	irq,
		dif_toggle_t	state )

Sets whether a particular interrupt is currently enabled or disabled.

Parameters

uart	A uart handle.
irq	An interrupt request.
state	The new toggle state for the interrupt.

Returns: The result of the operation.

Definition at line 318 of file dif_uart_autogen.c.

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Data Structure Documentation

◆ dif_uart

Macro Definition Documentation

◆ kDifUartIrqRxBreakErr

◆ kDifUartIrqRxFrameErr

◆ kDifUartIrqRxOverflow

◆ kDifUartIrqRxParityErr

◆ kDifUartIrqRxTimeout

◆ kDifUartIrqRxWatermark

◆ kDifUartIrqTxDone

◆ kDifUartIrqTxEmpty

◆ kDifUartIrqTxWatermark

Typedef Documentation

◆ dif_uart_irq_enable_snapshot_t

◆ dif_uart_irq_state_snapshot_t

◆ dif_uart_irq_t

◆ dif_uart_t

Enumeration Type Documentation

◆ dif_uart_alert

Function Documentation

◆ dif_uart_alert_force()

◆ dif_uart_get_dt()

◆ dif_uart_init()

◆ dif_uart_init_from_dt()

◆ dif_uart_irq_acknowledge()

◆ dif_uart_irq_acknowledge_all()

◆ dif_uart_irq_acknowledge_state()

◆ dif_uart_irq_disable_all()

◆ dif_uart_irq_force()

◆ dif_uart_irq_get_enabled()

◆ dif_uart_irq_get_state()

◆ dif_uart_irq_get_type()

◆ dif_uart_irq_is_pending()

◆ dif_uart_irq_restore_all()

◆ dif_uart_irq_set_enabled()