Functions to setup and manage character device (chardev) interfaces associated with a PCI(e) device. More...

#include "edtdrvlnx.h"
#include <linux/device.h>
#include <linux/cdev.h>

Include dependency graph for chardev_intf.h:

Functions
int	edt_chardev_init (void)
	Create chardev region and device class, used by all char device interfaces to this PCI device. More...

int	edt_chardev_cleanup (void)
	Cleanup after edt_chardev_init(). More...

int	edt_chardev_create_interfaces (const Edt_Dev *edt_p)
	Create character device interfaces to this PCI device. More...

int	edt_chardev_destroy_interfaces (const Edt_Dev *edt_p)
	Remove all character device files previously created by edt_chardev_create_interfaces() More...

Detailed Description

Functions to setup and manage character device (chardev) interfaces associated with a PCI(e) device.

Function Documentation

int edt_chardev_init ( void )

Create chardev region and device class, used by all char device interfaces to this PCI device.

int edt_chardev_cleanup ( void )

Precondition: edt_pcidev_destroy_interfaces() should be called on each interface first, before calling this, so the cdev class remains valid.

int edt_chardev_create_interfaces ( const Edt_Dev * edt_p )

Create character device interfaces to this PCI device.

If this is a PCD driver, this will create device files like:

/dev/pcd0_0
/dev/pcd0_1
/dev/pcd0_2

And likewise for PDV:

/dev/pdv0_0
/dev/pdv0_1
/dev/pdv0_2

...where the first number is the EDT device's "unit" number, and the second is the the DMA channel index.

Parameters

edt_p EDT device structure. All channel structs must be initialized before calling this function.

int edt_chardev_destroy_interfaces ( const Edt_Dev * edt_p )

Remove all character device files previously created by edt_chardev_create_interfaces()

Parameters

edt_p EDT device structure.