| /* |
| * 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 - driver instance specific data |
| * @spi: spi_device |
| * @reg: supply regulator |
| * @mclk: external master clock |
| * @control: cached control word |
| * @xfer: default spi transfer |
| * @msg: default spi message |
| * @freq_xfer: tuning word spi transfer |
| * @freq_msg: tuning word spi message |
| * @data: spi transmit buffer |
| * @freq_data: tuning word spi transmit buffer |
| */ |
| |
| 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. |
| */ |
| __be16 data ____cacheline_aligned; |
| __be16 freq_data[2]; |
| }; |
| |
| |
| /* |
| * TODO: struct ad7887_platform_data needs to go into include/linux/iio |
| */ |
| |
| /** |
| * struct ad9834_platform_data - platform specific information |
| * @mclk: master clock in Hz |
| * @freq0: power up freq0 tuning word in Hz |
| * @freq1: power up freq1 tuning word in Hz |
| * @phase0: power up phase0 value [0..4095] correlates with 0..2PI |
| * @phase1: power up phase1 value [0..4095] correlates with 0..2PI |
| * @en_div2: digital output/2 is passed to the SIGN BIT OUT pin |
| * @en_signbit_msb_out: the MSB (or MSB/2) of the DAC data is connected to the |
| * SIGN BIT OUT pin. en_div2 controls whether it is the MSB |
| * or MSB/2 that is output. if en_signbit_msb_out=false, |
| * the on-board comparator is connected to SIGN BIT OUT |
| */ |
| |
| 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; |
| }; |
| |
| /** |
| * ad9834_supported_device_ids: |
| */ |
| |
| enum ad9834_supported_device_ids { |
| ID_AD9833, |
| ID_AD9834, |
| ID_AD9837, |
| ID_AD9838, |
| }; |
| |
| #endif /* IIO_DDS_AD9834_H_ */ |
