staging: iio: meter: new driver for ADE7759 devices

[mv-sheeva.git] / drivers / staging / iio / meter / ade7759.h

diff --git a/drivers/staging/iio/meter/ade7759.h b/drivers/staging/iio/meter/ade7759.h
new file mode 100644 (file)
index 0000000..813dea2
--- /dev/null
+++ b/drivers/staging/iio/meter/ade7759.h
@@ -0,0 +1,122 @@
+#ifndef _ADE7759_H
+#define _ADE7759_H
+
+#define ADE7759_WAVEFORM  0x01
+#define ADE7759_AENERGY   0x02
+#define ADE7759_RSTENERGY 0x03
+#define ADE7759_STATUS    0x04
+#define ADE7759_RSTSTATUS 0x05
+#define ADE7759_MODE      0x06
+#define ADE7759_CFDEN     0x07
+#define ADE7759_CH1OS     0x08
+#define ADE7759_CH2OS     0x09
+#define ADE7759_GAIN      0x0A
+#define ADE7759_APGAIN    0x0B
+#define ADE7759_PHCAL     0x0C
+#define ADE7759_APOS      0x0D
+#define ADE7759_ZXTOUT    0x0E
+#define ADE7759_SAGCYC    0x0F
+#define ADE7759_IRQEN     0x10
+#define ADE7759_SAGLVL    0x11
+#define ADE7759_TEMP      0x12
+#define ADE7759_LINECYC   0x13
+#define ADE7759_LENERGY   0x14
+#define ADE7759_CFNUM     0x15
+#define ADE7759_CHKSUM    0x1E
+#define ADE7759_DIEREV    0x1F
+
+#define ADE7759_READ_REG(a)    a
+#define ADE7759_WRITE_REG(a) ((a) | 0x80)
+
+#define ADE7759_MAX_TX    6
+#define ADE7759_MAX_RX    6
+#define ADE7759_STARTUP_DELAY 1
+
+#define ADE7759_SPI_SLOW       (u32)(300 * 1000)
+#define ADE7759_SPI_BURST      (u32)(1000 * 1000)
+#define ADE7759_SPI_FAST       (u32)(2000 * 1000)
+
+#define DRIVER_NAME            "ade7759"
+
+/**
+ * struct ade7759_state - device instance specific data
+ * @us:                        actual spi_device
+ * @work_trigger_to_ring: bh for triggered event handling
+ * @inter:             used to check if new interrupt has been triggered
+ * @last_timestamp:    passing timestamp from th to bh of interrupt handler
+ * @indio_dev:         industrial I/O device structure
+ * @trig:              data ready trigger registered with iio
+ * @tx:                        transmit buffer
+ * @rx:                        recieve buffer
+ * @buf_lock:          mutex to protect tx and rx
+ **/
+struct ade7759_state {
+       struct spi_device               *us;
+       struct work_struct              work_trigger_to_ring;
+       s64                             last_timestamp;
+       struct iio_dev                  *indio_dev;
+       struct iio_trigger              *trig;
+       u8                              *tx;
+       u8                              *rx;
+       struct mutex                    buf_lock;
+};
+#if defined(CONFIG_IIO_RING_BUFFER) && defined(THIS_HAS_RING_BUFFER_SUPPORT)
+/* At the moment triggers are only used for ring buffer
+ * filling. This may change!
+ */
+
+enum ade7759_scan {
+       ADE7759_SCAN_ACTIVE_POWER,
+       ADE7759_SCAN_CH1_CH2,
+       ADE7759_SCAN_CH1,
+       ADE7759_SCAN_CH2,
+};
+
+void ade7759_remove_trigger(struct iio_dev *indio_dev);
+int ade7759_probe_trigger(struct iio_dev *indio_dev);
+
+ssize_t ade7759_read_data_from_ring(struct device *dev,
+               struct device_attribute *attr,
+               char *buf);
+
+
+int ade7759_configure_ring(struct iio_dev *indio_dev);
+void ade7759_unconfigure_ring(struct iio_dev *indio_dev);
+
+int ade7759_initialize_ring(struct iio_ring_buffer *ring);
+void ade7759_uninitialize_ring(struct iio_ring_buffer *ring);
+#else /* CONFIG_IIO_RING_BUFFER */
+
+static inline void ade7759_remove_trigger(struct iio_dev *indio_dev)
+{
+}
+static inline int ade7759_probe_trigger(struct iio_dev *indio_dev)
+{
+       return 0;
+}
+
+static inline ssize_t
+ade7759_read_data_from_ring(struct device *dev,
+               struct device_attribute *attr,
+               char *buf)
+{
+       return 0;
+}
+
+static int ade7759_configure_ring(struct iio_dev *indio_dev)
+{
+       return 0;
+}
+static inline void ade7759_unconfigure_ring(struct iio_dev *indio_dev)
+{
+}
+static inline int ade7759_initialize_ring(struct iio_ring_buffer *ring)
+{
+       return 0;
+}
+static inline void ade7759_uninitialize_ring(struct iio_ring_buffer *ring)
+{
+}
+#endif /* CONFIG_IIO_RING_BUFFER */
+
+#endif