ad9834.h

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/*
 * AD9833/AD9834/AD9837/AD9838 SPI DDS driver
 *
 * Copyright 2010-2011 Analog Devices Inc.
 *
 * Licensed under the GPL-2.
 */
#ifndef IIO_DDS_AD9834_H_
#define IIO_DDS_AD9834_H_

/* Registers */

#define AD9834_REG_CMD      (0 << 14)
#define AD9834_REG_FREQ0    (1 << 14)
#define AD9834_REG_FREQ1    (2 << 14)
#define AD9834_REG_PHASE0   (6 << 13)
#define AD9834_REG_PHASE1   (7 << 13)

/* Command Control Bits */

#define AD9834_B28      (1 << 13)
#define AD9834_HLB      (1 << 12)
#define AD9834_FSEL     (1 << 11)
#define AD9834_PSEL     (1 << 10)
#define AD9834_PIN_SW       (1 << 9)
#define AD9834_RESET        (1 << 8)
#define AD9834_SLEEP1       (1 << 7)
#define AD9834_SLEEP12      (1 << 6)
#define AD9834_OPBITEN      (1 << 5)
#define AD9834_SIGN_PIB     (1 << 4)
#define AD9834_DIV2     (1 << 3)
#define AD9834_MODE     (1 << 1)

#define AD9834_FREQ_BITS    28
#define AD9834_PHASE_BITS   12

#define RES_MASK(bits)  ((1 << (bits)) - 1)

struct ad9834_state {
    struct spi_device       *spi;
    struct regulator        *reg;
    unsigned int            mclk;
    unsigned short          control;
    unsigned short          devid;
    struct spi_transfer     xfer;
    struct spi_message      msg;
    struct spi_transfer     freq_xfer[2];
    struct spi_message      freq_msg;

    /*
     * DMA (thus cache coherency maintenance) requires the
     * transfer buffers to live in their own cache lines.
     */
    unsigned short          data ____cacheline_aligned;
    unsigned short          freq_data[2] ;
};


/*
 * TODO: struct ad7887_platform_data needs to go into include/linux/iio
 */

struct ad9834_platform_data {
    unsigned int        mclk;
    unsigned int        freq0;
    unsigned int        freq1;
    unsigned short      phase0;
    unsigned short      phase1;
    bool            en_div2;
    bool            en_signbit_msb_out;
};

enum ad9834_supported_device_ids {
    ID_AD9833,
    ID_AD9834,
    ID_AD9837,
    ID_AD9838,
};

#endif /* IIO_DDS_AD9834_H_ */