axis_sram.h File Reference

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Detailed Description

Shares definitions between smart card code and interrupt code.

Author:

Andrew Roca

Shares definitions between smart card code and interrupt code

#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_sram_config.h"
#include "axis.h"
#include "axis_hardware.h"
#include "axis_pci.h"

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Data Structures
struct	access_control_entry
	Associates a bitmask and an address. More...
struct	sram_access_control
	wraps up the data needed to control the Axis read/write enables More...
struct	sram_block
	sram memory control block More...
Defines
#define	AXIS_SRAM_ENABLE_OFFSET   (0x0+CONTROL_OFFSET)
#define	LONG_SHIFT   4
#define	AXIS_READ_ENABLED   (1<<0)
#define	AXIS_WRITE_ENABLED   (1<<1)
#define	AXIS_AUTO_ACCESS   (1<<2)
Functions
int	build_sram_config (struct axis_pci_device_entry *device)
	Read the table defined in sram_config and convert it to a set of memory devices.
void	delete_sram_config (struct axis_pci_device_entry *device)
	Removes any SRAM devices created.
void	create_proc_sram_entries (struct axis_pci_device_entry *device)
	Creates a /proc directory fills it entries that output the current SRAM configuration.
void	delete_proc_sram_entries (struct axis_pci_device_entry *device)
	Deletes the SRAM related entries in the /Proc filesystem.
Variables
sram_config_entry	axis_sram_config []
	structure to define SRAM configuration
file_operations	ram_file_operations

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Define Documentation

#define AXIS_AUTO_ACCESS   (1<<2)

#define AXIS_READ_ENABLED   (1<<0)

#define AXIS_SRAM_ENABLE_OFFSET   (0x0+CONTROL_OFFSET)

#define AXIS_WRITE_ENABLED   (1<<1)

#define LONG_SHIFT   4

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Function Documentation

int build_sram_config (  struct axis_pci_device_entry *  device  )

Read the table defined in sram_config and convert it to a set of memory devices. Returns: 0 on success Parameters: device  - hardware master structure The SRAM configuration is compiled into the axis_sram_config structure this function reads the structure and creates partitions and devices according to the elements found there. Note at current if more than one MTD device is defined the MTD system seems to cause a kernel panic when the second MTD device is removed this happens in response to a module unload triggered by a rmmod axis command.

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void create_proc_sram_entries (  struct axis_pci_device_entry *  device  )

Creates a /proc directory fills it entries that output the current SRAM configuration. Returns: none Parameters: device  - Pointer to the hardware master control block This function creates a directory entry (under Axis) in the /proc file system and then creates entries in it, one for each SRAM partition defined. Each entry will output data describing the current state of the partition

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void delete_proc_sram_entries (  struct axis_pci_device_entry *  device  )

Deletes the SRAM related entries in the /Proc filesystem. Returns: none Parameters: device  - Pointer to the hardware master control block Deletes the SRAM related entries in the /Proc filesystem

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void delete_sram_config (  struct axis_pci_device_entry *  device  )

Removes any SRAM devices created. Returns: 0 on success Parameters: device  - hardware master structure Called if the driver is unloaded this destroys the drivers it created. Note at current if more than one MTD device is defined the MTD system seems to cause a kernel panic when the second MTD device is removed this happens in response to a module unload triggered by a rmmod axis command.

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Variable Documentation

struct sram_config_entry axis_sram_config[]

structure to define SRAM configuration

struct file_operations ram_file_operations

Defines a table of file operations for an Axis Ram device Users open a generic Axis device if the TYPE part of the minor number is an SRAM device we replace the generic axis file operations structure for the open file with this. (Budget virtual construction??) This way we only need to register one axis device type with the kernel but can still code devices individually

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