axis_driver.h File Reference

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Detailed Description

Kernel thread export plus definitions to split minor number.

Author:

Andrew Roca

This makes public a kernel thread routine plus enumerations and constants used to choose how to subclass the device based on minor number

#include "axis_hardware.h"

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Enumerations
enum	axis_sub_device_type {   sram = 0x0,   inputs = 0x1,   dipswitches = 0x2,   outputs = 0x3,   rtc = 0x4,   serial_router = 0x5,   spi = 0x6,   serial_number = 0x7,   crypto = 0x8,   smart_card = 0x9 }
	used to associate minor numbers to Axis components The driver splits the minor number into two bit fields the upper is used to define which type of hardware to use the lower defines which one. This defines the hardware types supported. Support for serial ports and sram block access are delegated to existing kernel devices and get remapped to alternative major numbers More...
Functions
int	axis_activity_thread (void *data)
	Function for a thread scans for missing interrupts and time out the driver.
int	add_proc_exports (struct axis_pci_device_entry *device)
	Function to create a set of axis specific entries in the /proc file system.
void	remove_proc_exports (struct axis_pci_device_entry *device)
	Function to delete Axis entries from /proc.

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Enumeration Type Documentation

enum axis_sub_device_type

used to associate minor numbers to Axis components The driver splits the minor number into two bit fields the upper is used to define which type of hardware to use the lower defines which one. This defines the hardware types supported. Support for serial ports and sram block access are delegated to existing kernel devices and get remapped to alternative major numbers Enumeration values: sram  SRAM character device inputs  inputs character device dipswitches  dipswitches character device outputs  outputs character device rtc  rtc character device not used (access via user mode driver and spi) serial_router  serial routing character device spi  spi character device serial_number  serial number character device crypto  cryptographic functions character device smart_card  smart card character device

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Function Documentation

int add_proc_exports (  struct axis_pci_device_entry *  device  )

Function to create a set of axis specific entries in the /proc file system. Parameters: device  - the master configuration/control structure for each Axis PCI device Returns: always 0 Adds a set of entries to the /proc file system these allow easy configuration and control to be implemented from the command line or via shell scripts as well as from conventional programming

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int axis_activity_thread (  void *  data  )

Function for a thread scans for missing interrupts and time out the driver. Parameters: data  - typed as void as this function is a callback but casted back to pointer to Master control structure Returns: 0 but not relevent This function becomes the main loop in a kernel thread tracking the Axis hardware in the background. Main use is to timeout IO which stall pending a non occuring interrupt

void remove_proc_exports (  struct axis_pci_device_entry *  device  )

Function to delete Axis entries from /proc. Parameters: device  - master structure pointer for each Axis Returns: none

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