BEST_direct_tetramm.c File Reference

Char driver for direct TetrAmm. More...

#include <linux/module.h>
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include "BEST_PCIe.h"
#include "BEST_PCIe_internal.h"
#include "BEST_direct_tetramm.h"

Macros
#define	debug_print(fmt, args...)   do { if (DEBUG_tetramm_PRINT) printk( KERN_DEBUG fmt, ##args); } while (0)
#define	DIRECT_READ_DATA_OFFSET   0x10
	offset at which data start (first word enables latch)
#define	DIRECT_WRITE_DATA_OFFSET   0x10
	offset at which data start (first word enables latch)
#define	TETRAMM_ASCII_FMT   "%016llx"

Functions
int	tetramm_char_open (struct inode *inode, struct file *file)
	Opens char device (stores dev struct in pirvate data) More...
ssize_t	tetramm_char_read (struct file *file, char __user *buf, size_t count, loff_t *pos)
	Reads from char device. More...
long	tetramm_char_ioctl (struct file *filp, unsigned int cmd, unsigned long arg)
int	tetramm_dev_create (struct tetramm_dev_struct *dev, struct class *best_class)
	Creates new TetrAmm char device. More...
void	tetramm_dev_remove (struct tetramm_dev_struct *dev, struct class *best_class)
	Removes TetrAmm char device. More...

Variables
static const struct file_operations	dma_char_fops

Detailed Description

Char driver for direct TetrAmm.

Author

Jan Marjanovic (j.mar.nosp@m.jano.nosp@m.vic@c.nosp@m.aene.nosp@m.ls.co.nosp@m.m)

Date

July 2014

Function Documentation

int tetramm_char_open	(	struct inode *	inode,
		struct file *	file
	)

Opens char device (stores dev struct in pirvate data)

Parameters

inode	Index node structure
file	File structure

Returns

0 on success, negative number on fail

ssize_t tetramm_char_read	(	struct file *	file,
		char __user *	buf,
		size_t	count,
		loff_t *	pos
	)

Reads from char device.

Parameters

file	File structure (path, ...)
buf	Buffer to read to
count	Number of bytes to read
pos

Returns

Numbers of bytes successfully read

int tetramm_dev_create	(	struct tetramm_dev_struct *	dev,
		struct class *	best_class
	)

Creates new TetrAmm char device.

Parameters

dev	Structure with TetrAmm info
best_class	Class which this device will be part of

void tetramm_dev_remove	(	struct tetramm_dev_struct *	dev,
		struct class *	best_class
	)

Removes TetrAmm char device.

Parameters

dev	Structure with TetrAmm info
best_class	Class which this device will be part of

Variable Documentation

const struct file_operations dma_char_fops

static

Initial value:

= {
    .owner      = THIS_MODULE,
    .open       = tetramm_char_open,
    .read       = tetramm_char_read,
    .unlocked_ioctl = tetramm_char_ioctl
}