drivers/staging/iio/accel/adis16204.h

   1 #ifndef SPI_ADIS16204_H_
   2 #define SPI_ADIS16204_H_
   3
   4 #define ADIS16204_STARTUP_DELAY 220 /* ms */
   5
   6 #define ADIS16204_READ_REG(a)    a
   7 #define ADIS16204_WRITE_REG(a) ((a) | 0x80)
   8
   9 #define ADIS16204_FLASH_CNT      0x00 /* Flash memory write count */
  10 #define ADIS16204_SUPPLY_OUT     0x02 /* Output, power supply */
  11 #define ADIS16204_XACCL_OUT      0x04 /* Output, x-axis accelerometer */
  12 #define ADIS16204_YACCL_OUT      0x06 /* Output, y-axis accelerometer */
  13 #define ADIS16204_AUX_ADC        0x08 /* Output, auxiliary ADC input */
  14 #define ADIS16204_TEMP_OUT       0x0A /* Output, temperature */
  15 #define ADIS16204_X_PEAK_OUT     0x0C /* Twos complement */
  16 #define ADIS16204_Y_PEAK_OUT     0x0E /* Twos complement */
  17 #define ADIS16204_XACCL_NULL     0x10 /* Calibration, x-axis acceleration offset null */
  18 #define ADIS16204_YACCL_NULL     0x12 /* Calibration, y-axis acceleration offset null */
  19 #define ADIS16204_XACCL_SCALE    0x14 /* X-axis scale factor calibration register */
  20 #define ADIS16204_YACCL_SCALE    0x16 /* Y-axis scale factor calibration register */
  21 #define ADIS16204_XY_RSS_OUT     0x18 /* XY combined acceleration (RSS) */
  22 #define ADIS16204_XY_PEAK_OUT    0x1A /* Peak, XY combined output (RSS) */
  23 #define ADIS16204_CAP_BUF_1      0x1C /* Capture buffer output register 1 */
  24 #define ADIS16204_CAP_BUF_2      0x1E /* Capture buffer output register 2 */
  25 #define ADIS16204_ALM_MAG1       0x20 /* Alarm 1 amplitude threshold */
  26 #define ADIS16204_ALM_MAG2       0x22 /* Alarm 2 amplitude threshold */
  27 #define ADIS16204_ALM_CTRL       0x28 /* Alarm control */
  28 #define ADIS16204_CAPT_PNTR      0x2A /* Capture register address pointer */
  29 #define ADIS16204_AUX_DAC        0x30 /* Auxiliary DAC data */
  30 #define ADIS16204_GPIO_CTRL      0x32 /* General-purpose digital input/output control */
  31 #define ADIS16204_MSC_CTRL       0x34 /* Miscellaneous control */
  32 #define ADIS16204_SMPL_PRD       0x36 /* Internal sample period (rate) control */
  33 #define ADIS16204_AVG_CNT        0x38 /* Operation, filter configuration */
  34 #define ADIS16204_SLP_CNT        0x3A /* Operation, sleep mode control */
  35 #define ADIS16204_DIAG_STAT      0x3C /* Diagnostics, system status register */
  36 #define ADIS16204_GLOB_CMD       0x3E /* Operation, system command register */
  37
  38 #define ADIS16204_OUTPUTS        5
  39
  40 /* MSC_CTRL */
  41 #define ADIS16204_MSC_CTRL_PWRUP_SELF_TEST      (1 << 10) /* Self-test at power-on: 1 = disabled, 0 = enabled */
  42 #define ADIS16204_MSC_CTRL_SELF_TEST_EN         (1 << 8)  /* Self-test enable */
  43 #define ADIS16204_MSC_CTRL_DATA_RDY_EN          (1 << 2)  /* Data-ready enable: 1 = enabled, 0 = disabled */
  44 #define ADIS16204_MSC_CTRL_ACTIVE_HIGH          (1 << 1)  /* Data-ready polarity: 1 = active high, 0 = active low */
  45 #define ADIS16204_MSC_CTRL_DATA_RDY_DIO2        (1 << 0)  /* Data-ready line selection: 1 = DIO2, 0 = DIO1 */
  46
  47 /* DIAG_STAT */
  48 #define ADIS16204_DIAG_STAT_ALARM2        (1<<9) /* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
  49 #define ADIS16204_DIAG_STAT_ALARM1        (1<<8) /* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
  50 #define ADIS16204_DIAG_STAT_SELFTEST_FAIL (1<<5) /* Self-test diagnostic error flag: 1 = error condition,
  51                                                 0 = normal operation */
  52 #define ADIS16204_DIAG_STAT_SPI_FAIL      (1<<3) /* SPI communications failure */
  53 #define ADIS16204_DIAG_STAT_FLASH_UPT     (1<<2) /* Flash update failure */
  54 #define ADIS16204_DIAG_STAT_POWER_HIGH    (1<<1) /* Power supply above 3.625 V */
  55 #define ADIS16204_DIAG_STAT_POWER_LOW     (1<<0) /* Power supply below 2.975 V */
  56
  57 /* GLOB_CMD */
  58 #define ADIS16204_GLOB_CMD_SW_RESET     (1<<7)
  59 #define ADIS16204_GLOB_CMD_CLEAR_STAT   (1<<4)
  60 #define ADIS16204_GLOB_CMD_FACTORY_CAL  (1<<1)
  61
  62 #define ADIS16204_MAX_TX 24
  63 #define ADIS16204_MAX_RX 24
  64
  65 #define ADIS16204_ERROR_ACTIVE          (1<<14)
  66
  67 /**
  68  * struct adis16204_state - device instance specific data
  69  * @us:                 actual spi_device
  70  * @work_trigger_to_ring: bh for triggered event handling
  71  * @inter:              used to check if new interrupt has been triggered
  72  * @last_timestamp:     passing timestamp from th to bh of interrupt handler
  73  * @indio_dev:          industrial I/O device structure
  74  * @trig:               data ready trigger registered with iio
  75  * @tx:                 transmit buffer
  76  * @rx:                 receive buffer
  77  * @buf_lock:           mutex to protect tx and rx
  78  **/
  79 struct adis16204_state {
  80         struct spi_device               *us;
  81         struct work_struct              work_trigger_to_ring;
  82         s64                             last_timestamp;
  83         struct iio_dev                  *indio_dev;
  84         struct iio_trigger              *trig;
  85         u8                              *tx;
  86         u8                              *rx;
  87         struct mutex                    buf_lock;
  88 };
  89
  90 int adis16204_set_irq(struct device *dev, bool enable);
  91
  92 #ifdef CONFIG_IIO_RING_BUFFER
  93 enum adis16204_scan {
  94         ADIS16204_SCAN_SUPPLY,
  95         ADIS16204_SCAN_ACC_X,
  96         ADIS16204_SCAN_ACC_Y,
  97         ADIS16204_SCAN_AUX_ADC,
  98         ADIS16204_SCAN_TEMP,
  99 };
 100
 101 void adis16204_remove_trigger(struct iio_dev *indio_dev);
 102 int adis16204_probe_trigger(struct iio_dev *indio_dev);
 103
 104 ssize_t adis16204_read_data_from_ring(struct device *dev,
 105                                       struct device_attribute *attr,
 106                                       char *buf);
 107
 108 int adis16204_configure_ring(struct iio_dev *indio_dev);
 109 void adis16204_unconfigure_ring(struct iio_dev *indio_dev);
 110
 111 int adis16204_initialize_ring(struct iio_ring_buffer *ring);
 112 void adis16204_uninitialize_ring(struct iio_ring_buffer *ring);
 113 #else /* CONFIG_IIO_RING_BUFFER */
 114
 115 static inline void adis16204_remove_trigger(struct iio_dev *indio_dev)
 116 {
 117 }
 118
 119 static inline int adis16204_probe_trigger(struct iio_dev *indio_dev)
 120 {
 121         return 0;
 122 }
 123
 124 static inline ssize_t
 125 adis16204_read_data_from_ring(struct device *dev,
 126                               struct device_attribute *attr,
 127                               char *buf)
 128 {
 129         return 0;
 130 }
 131
 132 static int adis16204_configure_ring(struct iio_dev *indio_dev)
 133 {
 134         return 0;
 135 }
 136
 137 static inline void adis16204_unconfigure_ring(struct iio_dev *indio_dev)
 138 {
 139 }
 140
 141 static inline int adis16204_initialize_ring(struct iio_ring_buffer *ring)
 142 {
 143         return 0;
 144 }
 145
 146 static inline void adis16204_uninitialize_ring(struct iio_ring_buffer *ring)
 147 {
 148 }
 149
 150 #endif /* CONFIG_IIO_RING_BUFFER */
 151 #endif /* SPI_ADIS16204_H_ */