spi_io.h

Go to the documentation of this file.

  /****************************************************************************
*
*     Axis 2 PCI Linux Kernel driver
*     File:    spi_io.c
*     Version: 1.0
*     Copyright 2004 Heber Limited (http://www.heber.co.uk)
*
*     This program is free software; you can redistribute it and/or modify it
*     under the terms of the GNU General Public License as published by the
*     Free Software Foundation; either version 2, or (at your option) any
*     later version.
*
*     This program is distributed in the hope that it will be useful, but
*     WITHOUT ANY WARRANTY; without even the implied warranty of
*     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
*     General Public License for more details.
*
*     You should have received a copy of the GNU General Public License along
*     with this program; if not, write to the Free Software Foundation, Inc.,
*     675 Mass Ave, Cambridge, MA 02139, USA.
*
*     Changes:
*
****************************************************************************/
#ifndef AXIS_SPI_IO_H
#define AXIS_SPI_IO_H
#ifndef _LINUX_KERNEL_H

#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>

#endif  //_LINUX_KERNEL_H

#ifndef AXIS_HARDWARE_H
#include "axis_hardware.h"
#endif //AXIS_HARDWARE_H

/*---------------------------spi defines--------------------------*/
#define MAX_AXIS_SPI_DEVICES 4
#define SPI_DATA_REGISTER_OFFSET 0x60
#define SPI_CONTROL_REGISTER_1_OFFSET (SPI_DATA_REGISTER_OFFSET+1)
#define SPI_CONTROL_REGISTER_2_OFFSET (SPI_DATA_REGISTER_OFFSET+2)
#define     SPI_ADDRESS_REGISTER_OFFSET (SPI_DATA_REGISTER_OFFSET+3)
#define     SPI_ENABLE_BIT (1<<7)
#define     SPI_ERROR_CLEAR_BIT (1<<0)
#define     SPI_MASTER_ACTIVE (1<<3)
#define     SPI_TX_REG_EMPTY (1<<2)
#define     SPI_RX_REG_READY (1<<1)
#define     SPI_OVERRUN (1<<0)
#define     SPI_INTERRUPT_ENABLE (1<<7)
#define     SPI_MASTER_MODE (1<<6)
#define     SPI_LSB_FIRST (1<<5)


struct spi_op ;
struct spi_channel
{
    atomic_t open_count                             ; 
    struct axis_pci_device_entry * parent_device    ; 
    unsigned char   channel_number                  ; 
    unsigned char   control                         ; 
    long            minimum_inter_char_time         ; 
} ;

struct spi_op
{
    struct spi_channel *    channel         ;       
    unsigned char *         data            ;       
    unsigned long           number_to_do    ;       
    unsigned char           status          ;       
} ;

void init_spi(struct axis_pci_device_entry * device);

extern struct file_operations spi_file_operations ;

#endif  //AXIS_SPI_IO_H

---