lowlevel.c File Reference

Contains low level operations for flink. More...

#include "flinklib.h"
#include "flinkioctl.h"
#include "types.h"
#include "error.h"
#include "log.h"
#include "valid.h"
#include <sys/ioctl.h>
#include <unistd.h>

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Functions
int	flink_ioctl (flink_dev *dev, int cmd, void *arg)
	IOCTL operation for a flink device. More...
ssize_t	flink_read (flink_subdev *subdev, uint32_t offset, uint8_t size, void *rdata)
	Read from a flink subdevice. More...
ssize_t	flink_write (flink_subdev *subdev, uint32_t offset, uint8_t size, void *wdata)
	Write to a flink subdevice. More...
int	flink_read_bit (flink_subdev *subdev, uint32_t offset, uint8_t bit, void *rdata)
	Read a single bit from a flink subdevice. More...
int	flink_write_bit (flink_subdev *subdev, uint32_t offset, uint8_t bit, void *wdata)
	Write a single bit to a flink subdevice. More...

Detailed Description

Contains low level operations for flink.

Contains functions to read from and write to the memory bank of flink devices directly. These functions can be used to communicate with user-defined flink subdevices.

Author

Martin Züger

Urs Graf

Definition in file lowlevel.c.

Function Documentation

int flink_ioctl	(	flink_dev *	dev,
		int	cmd,
		void *	arg
	)

IOCTL operation for a flink device.

Parameters

dev	Flink device handle.
cmd	IOCTL command.
arg	IOCTL arguments.

Returns

int: IOCTL return value or -1 in case of failure.

Definition at line 44 of file lowlevel.c.

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ssize_t flink_read	(	flink_subdev *	subdev,
		uint32_t	offset,
		uint8_t	size,
		void *	rdata
	)

Read from a flink subdevice.

Parameters

subdev	Subdevice to read from.
offset	Read offset, relative to the subdevice base address.
size	Nof bytes to read.
rdata	Pointer to a buffer where the read bytes are written to.

Returns

ssize_t: Nof bytes read from the subdevcie or a negative error code.

Definition at line 71 of file lowlevel.c.

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int flink_read_bit	(	flink_subdev *	subdev,
		uint32_t	offset,
		uint8_t	bit,
		void *	rdata
	)

Read a single bit from a flink subdevice.

Parameters

subdev	Subdevice to read from.
offset	Read offset, relative to the subdevice base address.
bit	Bit number to read in the byte given by offset.
rdata	Pointer to a buffer where the bit read should be written

Returns

int: 0 on succes, else -1.

Definition at line 149 of file lowlevel.c.

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ssize_t flink_write	(	flink_subdev *	subdev,
		uint32_t	offset,
		uint8_t	size,
		void *	wdata
	)

Write to a flink subdevice.

Parameters

subdev	Subdevice to write to.
offset	Write offset, relative to the subdevice base address.
size	Nof bytes to write.
wdata	Data to write.

Returns

ssize_t: Nof bytes written or -1 in case of error.

Definition at line 110 of file lowlevel.c.

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int flink_write_bit	(	flink_subdev *	subdev,
		uint32_t	offset,
		uint8_t	bit,
		void *	wdata
	)

Write a single bit to a flink subdevice.

Parameters

subdev	Subdevice to write to.
offset	Write offset, relative to the subdevice base address.
bit	Bit number to write in the byte given by offset.
wdata	Bit to write, a value of nonzero sets the bit, 0 clears the bit

Returns

int

Definition at line 187 of file lowlevel.c.

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