iio-sensors: Add suport for STEP_DETECTOR sensor

[android-x86/hardware-intel-libsensors.git] / common.h

diff --git a/common.h b/common.h
index 42cbe76..44b9fe6 100644 (file)
--- a/common.h
+++ b/common.h
@@ -5,9 +5,10 @@
 #ifndef __COMMON_H__
 #define __COMMON_H__
 
-#define MAX_DEVICES    8       /* Check iio devices 0 to MAX_DEVICES-1 */
-#define MAX_SENSORS    10      /* We can handle as many sensors */
+#define MAX_DEVICES    9       /* Check iio devices 0 to MAX_DEVICES-1 */
+#define MAX_SENSORS    12      /* We can handle as many sensors */
 #define MAX_CHANNELS   4       /* We can handle as many channels per sensor */
+#define MAX_EVENTS     8       /* We can handle as many events per channel */
 #define MAX_TRIGGERS   8       /* Check for triggers 0 to MAX_TRIGGERS-1 */
 
 #define DEV_FILE_PATH          "/dev/iio:device%d"
@@ -18,6 +19,8 @@
 #define ENABLE_PATH            BASE_PATH "buffer/enable"
 #define NAME_PATH              BASE_PATH "name"
 #define TRIGGER_PATH           BASE_PATH "trigger/current_trigger"
+#define EVENTS_PATH            BASE_PATH "events/"
+#define SENSOR_ENABLE_PATH     BASE_PATH "in_%s_en"
 #define SENSOR_OFFSET_PATH     BASE_PATH "in_%s_offset"
 #define SENSOR_SCALE_PATH      BASE_PATH "in_%s_scale"
 #define SENSOR_SAMPLING_PATH   BASE_PATH "in_%s_sampling_frequency"
@@ -46,6 +49,19 @@
 #define MODE_AUTO      0 /* autodetect */
 #define MODE_POLL      1
 #define MODE_TRIGGER   2
+#define MODE_EVENT     3
+
+typedef struct
+{
+       const char *type; /* event type; e.g: transition */
+       const char *dir;  /* event direction; e.g: rising */
+
+       /* sysfs entries located in /sys/bus/iio/devices/iio:deviceX/events/ */
+       const char *ev_en_path;
+       const char *ev_value_path;
+}
+event_descriptor_t;
+
 
 typedef struct
 {
@@ -60,6 +76,9 @@ typedef struct
        const char *raw_path;   /* _raw sysfs file name  */
        const char *input_path; /* _input sysfs file name */
        const char *scale_path; /* _scale sysfs file name */
+
+       const int num_events;
+       event_descriptor_t event[MAX_EVENTS];
 }
 channel_descriptor_t;
 
@@ -202,8 +221,11 @@ typedef struct
        void* filter;   /* Filtering data for noisy sensors */
        int filter_type;/* FILTER_ specification for this sensor ; default is FILTER_NONE */
 
-       float prev_val; /* Previously reported value, for on-change sensors */
-
+       /* Previously reported value, for on-change sensors */
+       union {
+               float data;
+               uint64_t data64;
+       } prev_val;
        /*
         * Certain sensors expose their readings through sysfs files that have a long response time (100-200 ms for ALS). Rather than block our
         * global control loop for several hundred ms each second, offload those lengthy blocking reads to dedicated threads, which will then report
@@ -243,6 +265,13 @@ typedef struct
         * events before filtering kicks in. We can also use it for statistics.
         */
        uint64_t event_count;
+
+       /* Some polled sensors need to be first enabled so that they start
+        * computing a set of values in hardware (e.g step counter). Enabling
+        * is done through a sysfs attribute in_<tag>_en
+        */
+       int needs_enable;
+
 }
 sensor_info_t;