parallel_io.h File Reference

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Detailed Description

Parallel interface support.

Author:

Andrew Roca

Exports functions to create and destroy a /proc system for parallel IO also exports several file operations structures defined by the parallel system to allow conventional (read/write) IO by user programs on Axis hardware. The IO mirror structure are defined here used by parallel_io.c and are embedded in the PCI structures

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/ioport.h>
#include <linux/serial.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/mtd/mtd.h>
#include <linux/crypto.h>
#include <asm/uaccess.h>
#include "axis_hardware.h"

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Data Structures
struct	input_def
	Properties on individual input. More...
struct	output_def
	Properties on individual output. More...
struct	axis_io_bitmap
	Mirrors for Axis Parallel IO. More...
Defines
#define	AXIS_DIPSWITCH_NUMBER   16
#define	AXIS_DIPSWITCH_MAP_SIZE   (AXIS_DIPSWITCH_NUMBER>>3)
#define	AXIS_OUTPUTS_NUMBER   32
#define	AXIS_OUTPUTS_MAP_SIZE   (AXIS_OUTPUTS_NUMBER>>3)
#define	PARALLEL_IO_CONFIGURATION   (0x30+CONTROL_OFFSET)
#define	PARALLEL_OUTPUTS_PORT   (0x34+CONTROL_OFFSET)
#define	RAW_PARALLEL_INPUTS_PORT   (0x20+CONTROL_OFFSET)
#define	DEBOUNCED_PARALLEL_INPUTS_PORT   (0x28+CONTROL_OFFSET)
#define	RAW_MISC_INPUTS_PORT   (0x24+CONTROL_OFFSET)
#define	DEBOUNCED_MISC_INPUTS_PORT   (0x2C+CONTROL_OFFSET)
#define	READ_INPUTS_MASK_REGISTER   (0x38+CONTROL_OFFSET)
#define	READ_MISC_MASK_REGISTER   (0x3C+CONTROL_OFFSET)
#define	DIPSWITCH_OFFSET   0x64
#define	AUTO_READ_ENABLE   (1<<0)
#define	AUTO_WRITE_ENABLE   (1<<4)
#define	MISC_INPUTS   4
#define	AXIS_INPUTS_NUMBER   40
#define	AXIS_INPUTS_MAP_SIZE   (AXIS_INPUTS_NUMBER>>3)
#define	AXIS_OUTPUTS_NUMBER   32
#define	AXIS_OUTPUTS_MAP_SIZE   (AXIS_OUTPUTS_NUMBER>>3)
Functions
void	create_proc_dipswitch_entries (struct axis_pci_device_entry *device)
	create /proc entries for dipswitches
void	delete_proc_dipswitch_entries (struct axis_pci_device_entry *device)
	Remove the /proc dipswitch entries.
void	create_proc_input_entries (struct axis_pci_device_entry *device)
	create /proc entries for inputs
void	delete_proc_input_entries (struct axis_pci_device_entry *device)
	Remove the /proc input entries.
void	create_proc_output_entries (struct axis_pci_device_entry *device)
	create /proc entries for outputs
void	delete_proc_output_entries (struct axis_pci_device_entry *device)
	Remove the /proc output entries.
void	update_inputs_bitmap (struct axis_pci_device_entry *device)
	synchs the inputs mirror with physical hardware
void	enable_axis_inputs (struct axis_pci_device_entry *device)
	Enables Axis inputs.
void	init_parallel_io (struct axis_pci_device_entry *device)
	Initalises AXIS parallel.
Variables
file_operations	output_file_operations
file_operations	dipswitch_file_operations
file_operations	input_file_operations

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Define Documentation

#define AUTO_READ_ENABLE   (1<<0)

#define AUTO_WRITE_ENABLE   (1<<4)

#define AXIS_DIPSWITCH_MAP_SIZE   (AXIS_DIPSWITCH_NUMBER>>3)

#define AXIS_DIPSWITCH_NUMBER   16

#define AXIS_INPUTS_MAP_SIZE   (AXIS_INPUTS_NUMBER>>3)

#define AXIS_INPUTS_NUMBER   40

#define AXIS_OUTPUTS_MAP_SIZE   (AXIS_OUTPUTS_NUMBER>>3)

#define AXIS_OUTPUTS_MAP_SIZE   (AXIS_OUTPUTS_NUMBER>>3)

#define AXIS_OUTPUTS_NUMBER   32

#define AXIS_OUTPUTS_NUMBER   32

#define DEBOUNCED_MISC_INPUTS_PORT   (0x2C+CONTROL_OFFSET)

#define DEBOUNCED_PARALLEL_INPUTS_PORT   (0x28+CONTROL_OFFSET)

#define DIPSWITCH_OFFSET   0x64

#define MISC_INPUTS   4

#define PARALLEL_IO_CONFIGURATION   (0x30+CONTROL_OFFSET)

#define PARALLEL_OUTPUTS_PORT   (0x34+CONTROL_OFFSET)

#define RAW_MISC_INPUTS_PORT   (0x24+CONTROL_OFFSET)

#define RAW_PARALLEL_INPUTS_PORT   (0x20+CONTROL_OFFSET)

#define READ_INPUTS_MASK_REGISTER   (0x38+CONTROL_OFFSET)

#define READ_MISC_MASK_REGISTER   (0x3C+CONTROL_OFFSET)

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Function Documentation

void create_proc_dipswitch_entries (  struct axis_pci_device_entry *  device  )

create /proc entries for dipswitches Parameters: device  - master hardware structure Returns: NONE Called by the PCI probe function creates a directory full of inputs

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void create_proc_input_entries (  struct axis_pci_device_entry *  device  )

create /proc entries for inputs Parameters: device  - master hardware structure Returns: NONE Called by the PCI probe function creates a directory full of inputs

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void create_proc_output_entries (  struct axis_pci_device_entry *  device  )

create /proc entries for outputs Parameters: device  - master hardware structure Returns: NONE Called by the PCI probe function creates a directory full of outputs

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void delete_proc_dipswitch_entries (  struct axis_pci_device_entry *  device  )

Remove the /proc dipswitch entries. Parameters: device  - master hardware structure Returns: NONE Removes the /proc dipswitch entries

void delete_proc_input_entries (  struct axis_pci_device_entry *  device  )

Remove the /proc input entries. Parameters: device  - master hardware structure Returns: NONE Delete all the input /proc entries called if PCI device removed (unlikely) or on module unload

void delete_proc_output_entries (  struct axis_pci_device_entry *  device  )

Remove the /proc output entries. Parameters: device  - master hardware structure Returns: NONE Remove all the entries in the /proc file system related to outputs

void enable_axis_inputs (  struct axis_pci_device_entry *  device  )

Enables Axis inputs. Parameters: device  - hardware master structure Returns: NONE Enables Axis inputs

void init_parallel_io (  struct axis_pci_device_entry *  device  )

Initalises AXIS parallel. Parameters: device  - hardware master structure Returns: NONE Initalises AXIS parallel, called as PCI device is detected

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void update_inputs_bitmap (  struct axis_pci_device_entry *  device  )

synchs the inputs mirror with physical hardware Parameters: device  - hardware master structure Returns: NONE Reads the inputs temp version pending stage two inputs

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Variable Documentation

struct file_operations dipswitch_file_operations

struct file_operations input_file_operations

struct file_operations output_file_operations

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