2 * AD9833/AD9834/AD9837/AD9838 SPI DDS driver
4 * Copyright 2010-2011 Analog Devices Inc.
6 * Licensed under the GPL-2.
8 #ifndef IIO_DDS_AD9834_H_
9 #define IIO_DDS_AD9834_H_
13 #define AD9834_REG_CMD (0 << 14)
14 #define AD9834_REG_FREQ0 (1 << 14)
15 #define AD9834_REG_FREQ1 (2 << 14)
16 #define AD9834_REG_PHASE0 (6 << 13)
17 #define AD9834_REG_PHASE1 (7 << 13)
19 /* Command Control Bits */
21 #define AD9834_B28 (1 << 13)
22 #define AD9834_HLB (1 << 12)
23 #define AD9834_FSEL (1 << 11)
24 #define AD9834_PSEL (1 << 10)
25 #define AD9834_PIN_SW (1 << 9)
26 #define AD9834_RESET (1 << 8)
27 #define AD9834_SLEEP1 (1 << 7)
28 #define AD9834_SLEEP12 (1 << 6)
29 #define AD9834_OPBITEN (1 << 5)
30 #define AD9834_SIGN_PIB (1 << 4)
31 #define AD9834_DIV2 (1 << 3)
32 #define AD9834_MODE (1 << 1)
34 #define AD9834_FREQ_BITS 28
35 #define AD9834_PHASE_BITS 12
37 #define RES_MASK(bits) ((1 << (bits)) - 1)
40 * struct ad9834_state - driver instance specific data
41 * @indio_dev: the industrial I/O device
43 * @reg: supply regulator
44 * @mclk: external master clock
45 * @control: cached control word
46 * @xfer: default spi transfer
47 * @msg: default spi message
48 * @freq_xfer: tuning word spi transfer
49 * @freq_msg: tuning word spi message
50 * @data: spi transmit buffer
51 * @freq_data: tuning word spi transmit buffer
55 struct iio_dev *indio_dev;
56 struct spi_device *spi;
57 struct regulator *reg;
59 unsigned short control;
61 struct spi_transfer xfer;
62 struct spi_message msg;
63 struct spi_transfer freq_xfer[2];
64 struct spi_message freq_msg;
67 * DMA (thus cache coherency maintenance) requires the
68 * transfer buffers to live in their own cache lines.
70 unsigned short data ____cacheline_aligned;
71 unsigned short freq_data[2] ;
76 * TODO: struct ad7887_platform_data needs to go into include/linux/iio
80 * struct ad9834_platform_data - platform specific information
81 * @mclk: master clock in Hz
82 * @freq0: power up freq0 tuning word in Hz
83 * @freq1: power up freq1 tuning word in Hz
84 * @phase0: power up phase0 value [0..4095] correlates with 0..2PI
85 * @phase1: power up phase1 value [0..4095] correlates with 0..2PI
86 * @en_div2: digital output/2 is passed to the SIGN BIT OUT pin
87 * @en_signbit_msb_out: the MSB (or MSB/2) of the DAC data is connected to the
88 * SIGN BIT OUT pin. en_div2 controls whether it is the MSB
89 * or MSB/2 that is output. if en_signbit_msb_out=false,
90 * the on-board comparator is connected to SIGN BIT OUT
93 struct ad9834_platform_data {
97 unsigned short phase0;
98 unsigned short phase1;
100 bool en_signbit_msb_out;
104 * ad9834_supported_device_ids:
107 enum ad9834_supported_device_ids {
114 #endif /* IIO_DDS_AD9834_H_ */