uhd

/*

 *  Copyright (C) 2010 Ettus Research, LLC

 *

 *  Written by Philip Balister <philip@opensdr.com>

 *

 *  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 of the License, or

 *  (at your option) any later version.

 */

#ifndef __USRP_E_H

#define __USRP_E_H

#include <linux/types.h>

#include <linux/ioctl.h>

struct usrp_e_ctl16 {

        __u32 offset;

        __u32 count;

        __u16 buf[20];

};

struct usrp_e_ctl32 {

        __u32 offset;

        __u32 count;

        __u32 buf[10];

};

// SPI interface

#define UE_SPI_TXONLY        0

#define UE_SPI_TXRX        1

// Defines for spi ctrl register

#define UE_SPI_CTRL_ASS                (1<<13)

#define UE_SPI_CTRL_IE                (1<<12)

#define UE_SPI_CTRL_LSB                (1<<11)

#define UE_SPI_CTRL_TXNEG        (1<<10)

#define UE_SPI_CTRL_RXNEG        (1<<9)

#define UE_SPI_CTRL_GO_BSY        (1<<8)

#define UE_SPI_CTRL_CHAR_LEN_MASK        0x7f

#define UE_SPI_PUSH_RISE        0

#define UE_SPI_PUSH_FALL        UE_SPI_CTRL_TXNEG

#define UE_SPI_LATCH_RISE        0

#define UE_SPI_LATCH_FALL        UE_SPI_CTRL_RXNEG

struct usrp_e_spi {

        __u8 readback;

        __u32 slave;

        __u32 data;

        __u32 length;

        __u32 flags;

};

struct usrp_e_i2c {

        __u8 addr;

        __u32 len;

        __u8 data[];

};

#define USRP_E_IOC_MAGIC        'u'

#define USRP_E_WRITE_CTL16        _IOW(USRP_E_IOC_MAGIC, 0x20, struct usrp_e_ctl16)

#define USRP_E_READ_CTL16        _IOWR(USRP_E_IOC_MAGIC, 0x21, struct usrp_e_ctl16)

#define USRP_E_WRITE_CTL32        _IOW(USRP_E_IOC_MAGIC, 0x22, struct usrp_e_ctl32)

#define USRP_E_READ_CTL32        _IOWR(USRP_E_IOC_MAGIC, 0x23, struct usrp_e_ctl32)

#define USRP_E_SPI                _IOW(USRP_E_IOC_MAGIC, 0x24, struct usrp_e_spi)

#define USRP_E_I2C_READ                _IOR(USRP_E_IOC_MAGIC, 0x25, struct usrp_e_i2c)

#define USRP_E_I2C_WRITE        _IOW(USRP_E_IOC_MAGIC, 0x26, struct usrp_e_i2c)

// Data transfer frame definition

struct usrp_transfer_frame {

        __u32 flags;

        __u32 len;

        __u8  buf[];

};

// Flag defines

#define RB_USER (1 << 0)

#define RB_KERNEL (1 << 1)

#define RB_OVERRUN (1 << 2)

struct ring_buffer_entry {

        unsigned long dma_addr;

        struct usrp_transfer_frame *frame_addr;

};

#endif