X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=enumeration.c;h=e5703e7340678d1cd242b8af9d6230836dac7c3d;hb=53b3fe263b1716d46b0e74234323a159497cb1e1;hp=852f4d41a8bcb040a6b82c809cd0017740ffd2ca;hpb=283c4d88c2df000957cba69aa36725368de5cbf1;p=android-x86%2Fhardware-intel-libsensors.git

diff --git a/enumeration.c b/enumeration.c
index 852f4d4..e5703e7 100644
--- a/enumeration.c
+++ b/enumeration.c
@@ -1,10 +1,11 @@
 /*
- * Copyright (C) 2014 Intel Corporation.
+ * Copyright (C) 2014-2015 Intel Corporation.
  */
 
 #include <ctype.h>
 #include <dirent.h>
 #include <stdlib.h>
+#include <fcntl.h>
 #include <utils/Log.h>
 #include <hardware/sensors.h>
 #include "enumeration.h"
@@ -28,31 +29,388 @@
   * from the same iio device as the base one.
   */
 
-struct sensor_catalog_entry_t sensor_catalog[] = {
-	DECLARE_SENSOR3("accel",      SENSOR_TYPE_ACCELEROMETER,  "x", "y", "z")
-	DECLARE_SENSOR3("anglvel",    SENSOR_TYPE_GYROSCOPE,      "x", "y", "z")
-	DECLARE_SENSOR3("magn",       SENSOR_TYPE_MAGNETIC_FIELD, "x", "y", "z")
-	DECLARE_SENSOR1("intensity",  SENSOR_TYPE_LIGHT,          "both"       )
-	DECLARE_SENSOR0("illuminance",SENSOR_TYPE_LIGHT                        )
-	DECLARE_SENSOR3("incli",      SENSOR_TYPE_ORIENTATION,    "x", "y", "z")
-	DECLARE_SENSOR4("rot",        SENSOR_TYPE_ROTATION_VECTOR,
-					 "quat_x", "quat_y", "quat_z", "quat_w")
-	DECLARE_SENSOR0("temp",	      SENSOR_TYPE_AMBIENT_TEMPERATURE	       )
-	DECLARE_SENSOR0("proximity",  SENSOR_TYPE_PROXIMITY		       )
-	DECLARE_SENSOR3("anglvel",      SENSOR_TYPE_GYROSCOPE_UNCALIBRATED, "x", "y", "z")
+sensor_catalog_entry_t sensor_catalog[] = {
+	{
+		.tag		= "accel",
+		.type		= SENSOR_TYPE_ACCELEROMETER,
+		.num_channels	= 3,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_NAMED_CHANNEL("accel", "x") },
+			{ DECLARE_NAMED_CHANNEL("accel", "y") },
+			{ DECLARE_NAMED_CHANNEL("accel", "z") },
+		},
+	},
+	{
+		.tag		= "anglvel",
+		.type		= SENSOR_TYPE_GYROSCOPE,
+		.num_channels	= 3,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_NAMED_CHANNEL("anglvel", "x") },
+			{ DECLARE_NAMED_CHANNEL("anglvel", "y") },
+			{ DECLARE_NAMED_CHANNEL("anglvel", "z") },
+		},
+	},
+	{
+		.tag		= "magn",
+		.type		= SENSOR_TYPE_MAGNETIC_FIELD,
+		.num_channels	= 3,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_NAMED_CHANNEL("magn", "x") },
+			{ DECLARE_NAMED_CHANNEL("magn", "y") },
+			{ DECLARE_NAMED_CHANNEL("magn", "z") },
+		},
+	},
+	{
+		.tag		= "intensity",
+		.type		= SENSOR_TYPE_LIGHT,
+		.num_channels	= 1,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_NAMED_CHANNEL("intensity", "both") },
+		},
+	},
+	{
+		.tag		= "illuminance",
+		.type		= SENSOR_TYPE_LIGHT,
+		.num_channels	= 1,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_GENERIC_CHANNEL("illuminance") },
+		},
+	},
+	{
+		.tag		= "incli",
+		.type		= SENSOR_TYPE_ORIENTATION,
+		.num_channels	= 3,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_NAMED_CHANNEL("incli", "x") },
+			{ DECLARE_NAMED_CHANNEL("incli", "y") },
+			{ DECLARE_NAMED_CHANNEL("incli", "z") },
+		},
+	},
+	{
+		.tag		= "rot",
+		.type		= SENSOR_TYPE_ROTATION_VECTOR,
+		.num_channels	= 4,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_NAMED_CHANNEL("rot", "quat_x") },
+			{ DECLARE_NAMED_CHANNEL("rot", "quat_y") },
+			{ DECLARE_NAMED_CHANNEL("rot", "quat_z") },
+			{ DECLARE_NAMED_CHANNEL("rot", "quat_w") },
+		},
+	},
+	{
+		.tag		= "temp",
+		.type		= SENSOR_TYPE_AMBIENT_TEMPERATURE,
+		.num_channels	= 1,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_GENERIC_CHANNEL("temp") },
+		},
+	},
+	{
+		.tag		= "proximity",
+		.type		= SENSOR_TYPE_PROXIMITY,
+		.num_channels	= 1,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_GENERIC_CHANNEL("proximity") },
+		},
+	},
+	{
+		.tag		= "",
+		.type		= SENSOR_TYPE_GYROSCOPE_UNCALIBRATED,
+		.num_channels	= 0,
+		.is_virtual	= 1,
+		.channel = {
+			{ DECLARE_GENERIC_CHANNEL("") },
+		},
+
+	},
+	{
+		.tag		= "",
+		.type		= SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED,
+		.num_channels	= 0,
+		.is_virtual	= 1,
+		.channel = {
+			{ DECLARE_GENERIC_CHANNEL("") },
+		},
+	},
+	{
+		.tag		= "steps",
+		.type		= SENSOR_TYPE_STEP_COUNTER,
+		.num_channels	= 1,
+		.is_virtual	= 0,
+		.channel = {
+			{ DECLARE_GENERIC_CHANNEL("steps") },
+		},
+	},
+	{
+		.tag		= "steps",
+		.type		= SENSOR_TYPE_STEP_DETECTOR,
+		.num_channels	= 1,
+		.is_virtual	= 0,
+		.channel = {
+			{
+				DECLARE_VOID_CHANNEL("steps")
+				.num_events = 1,
+				.event = {
+					{ DECLARE_NAMED_EVENT("steps", "change") },
+				},
+			},
+		},
+	},
 };
 
-#define CATALOG_SIZE	ARRAY_SIZE(sensor_catalog)
+unsigned int catalog_size = ARRAY_SIZE(sensor_catalog);
 
+/* ACPI PLD (physical location of device) definitions, as used with sensors */
+
+#define PANEL_FRONT	4
+#define PANEL_BACK	5
 
 /* We equate sensor handles to indices in these tables */
 
-struct sensor_t      sensor_desc[MAX_SENSORS];	/* Android-level descriptors */
-struct sensor_info_t sensor_info[MAX_SENSORS];	/* Internal descriptors      */
-int sensor_count;				/* Detected sensors 	     */
+struct sensor_t	sensor_desc[MAX_SENSORS];	/* Android-level descriptors */
+sensor_info_t	sensor[MAX_SENSORS];		/* Internal descriptors      */
+int		sensor_count;			/* Detected sensors 	     */
+
+
+/* if the sensor has an _en attribute, we need to enable it */
+int get_needs_enable(int dev_num, const char *tag)
+{
+	char sysfs_path[PATH_MAX];
+	int fd;
+
+	sprintf(sysfs_path, SENSOR_ENABLE_PATH, dev_num, tag);
+
+	fd = open(sysfs_path, O_RDWR);
+	if (fd == -1)
+		return 0;
+
+	close(fd);
+	return 1;
+}
+
+static void setup_properties_from_pld (int s, int panel, int rotation,
+				       int num_channels)
+{
+	/*
+	 * Generate suitable order and opt_scale directives from the PLD panel
+	 * and rotation codes we got. This can later be superseded by the usual
+	 * properties if necessary. Eventually we'll need to replace these
+	 * mechanisms by a less convoluted one, such as a 3x3 placement matrix.
+	 */
+
+	int x = 1;
+	int y = 1;
+	int z = 1;
+	int xy_swap = 0;
+	int angle = rotation * 45;
+
+	/* Only deal with 3 axis chips for now */
+	if (num_channels < 3)
+		return;
+
+	if (panel == PANEL_BACK) {
+		/* Chip placed on the back panel ; negate x and z */
+		x = -x;
+		z = -z;
+	}
+
+	switch (angle) {
+		case 90: /* 90° clockwise: negate y then swap x,y */
+			xy_swap = 1;
+			y = -y;
+			break;
+
+		case 180: /* Upside down: negate x and y */
+			x = -x;
+			y = -y;
+			break;
+
+		case 270: /* 90° counter clockwise: negate x then swap x,y */
+			x = -x;
+			xy_swap = 1;
+			break;
+	}
+
+	if (xy_swap) {
+		sensor[s].order[0] = 1;
+		sensor[s].order[1] = 0;
+		sensor[s].order[2] = 2;
+		sensor[s].quirks |= QUIRK_FIELD_ORDERING;
+	}
+
+	sensor[s].channel[0].opt_scale = x;
+	sensor[s].channel[1].opt_scale = y;
+	sensor[s].channel[2].opt_scale = z;
+}
+
+
+static int is_valid_pld (int panel, int rotation)
+{
+	if (panel != PANEL_FRONT && panel != PANEL_BACK) {
+		ALOGW("Unhandled PLD panel spec: %d\n", panel);
+		return 0;
+	}
+
+	/* Only deal with 90° rotations for now */
+	if (rotation < 0 || rotation > 7 || (rotation & 1)) {
+		ALOGW("Unhandled PLD rotation spec: %d\n", rotation);
+		return 0;
+	}
+
+	return 1;
+}
+
+
+static int read_pld_from_properties (int s, int* panel, int* rotation)
+{
+	int p, r;
+
+	if (sensor_get_prop(s, "panel", &p))
+		return -1;
+
+	if (sensor_get_prop(s, "rotation", &r))
+		return -1;
+
+	if (!is_valid_pld(p, r))
+		return -1;
+
+	*panel = p;
+	*rotation = r;
+
+	ALOGI("S%d PLD from properties: panel=%d, rotation=%d\n", s, p, r);
+
+	return 0;
+}
+
+
+static int read_pld_from_sysfs (int s, int dev_num, int* panel, int* rotation)
+{
+	char sysfs_path[PATH_MAX];
+	int p,r;
+
+	sprintf(sysfs_path, BASE_PATH "../firmware_node/pld/panel", dev_num);
+
+	if (sysfs_read_int(sysfs_path, &p))
+		return -1;
+
+	sprintf(sysfs_path, BASE_PATH "../firmware_node/pld/rotation", dev_num);
+
+	if (sysfs_read_int(sysfs_path, &r))
+		return -1;
+
+	if (!is_valid_pld(p, r))
+		return -1;
+
+	*panel = p;
+	*rotation = r;
+
+	ALOGI("S%d PLD from sysfs: panel=%d, rotation=%d\n", s, p, r);
+
+	return 0;
+}
+
+
+static void decode_placement_information (int dev_num, int num_channels, int s)
+{
+	/*
+	 * See if we have optional "physical location of device" ACPI tags.
+	 * We're only interested in panel and rotation specifiers. Use the
+	 * .panel and .rotation properties in priority, and the actual ACPI
+	 * values as a second source.
+	 */
+
+	int panel;
+	int rotation;
+
+	if (read_pld_from_properties(s, &panel, &rotation) &&
+		read_pld_from_sysfs(s, dev_num, &panel, &rotation))
+			return; /* No PLD data available */
+
+	/* Map that to field ordering and scaling mechanisms */
+	setup_properties_from_pld(s, panel, rotation, num_channels);
+}
+
+
+static void populate_descriptors (int s, int sensor_type)
+{
+	int32_t		min_delay_us;
+	max_delay_t	max_delay_us;
+
+	/* Initialize Android-visible descriptor */
+	sensor_desc[s].name		= sensor_get_name(s);
+	sensor_desc[s].vendor		= sensor_get_vendor(s);
+	sensor_desc[s].version		= sensor_get_version(s);
+	sensor_desc[s].handle		= s;
+	sensor_desc[s].type		= sensor_type;
+
+	sensor_desc[s].maxRange		= sensor_get_max_range(s);
+	sensor_desc[s].resolution	= sensor_get_resolution(s);
+	sensor_desc[s].power		= sensor_get_power(s);
+	sensor_desc[s].stringType	= sensor_get_string_type(s);
+
+	/* None of our supported sensors requires a special permission */
+	sensor_desc[s].requiredPermission = "";
+
+	sensor_desc[s].flags = sensor_get_flags(s);
+	sensor_desc[s].minDelay = sensor_get_min_delay(s);
+	sensor_desc[s].maxDelay = sensor_get_max_delay(s);
+
+	ALOGV("Sensor %d (%s) type(%d) minD(%d) maxD(%d) flags(%2.2x)\n",
+		s, sensor[s].friendly_name, sensor_desc[s].type,
+		sensor_desc[s].minDelay, sensor_desc[s].maxDelay,
+		sensor_desc[s].flags);
+
+	/* We currently do not implement batching */
+	sensor_desc[s].fifoReservedEventCount = 0;
+	sensor_desc[s].fifoMaxEventCount = 0;
+
+	min_delay_us = sensor_desc[s].minDelay;
+	max_delay_us = sensor_desc[s].maxDelay;
+
+	sensor[s].min_supported_rate = max_delay_us ? 1000000.0 / max_delay_us : 1;
+	sensor[s].max_supported_rate = min_delay_us && min_delay_us != -1 ? 1000000.0 / min_delay_us : 0;
+}
 
 
-static void add_sensor (int dev_num, int catalog_index, int use_polling)
+static void add_virtual_sensor (int catalog_index)
+{
+	int s;
+	int sensor_type;
+
+	if (sensor_count == MAX_SENSORS) {
+		ALOGE("Too many sensors!\n");
+		return;
+	}
+
+	sensor_type = sensor_catalog[catalog_index].type;
+
+	s = sensor_count;
+
+	sensor[s].is_virtual = 1;
+	sensor[s].catalog_index	= catalog_index;
+	sensor[s].type		= sensor_type;
+
+	populate_descriptors(s, sensor_type);
+
+	/* Initialize fields related to sysfs reads offloading */
+	sensor[s].thread_data_fd[0]  = -1;
+	sensor[s].thread_data_fd[1]  = -1;
+	sensor[s].acquisition_thread = -1;
+
+	sensor_count++;
+}
+
+
+static void add_sensor (int dev_num, int catalog_index, int mode)
 {
 	int s;
 	int sensor_type;
@@ -65,6 +423,7 @@ static void add_sensor (int dev_num, int catalog_index, int use_polling)
 	const char* ch_name;
 	int num_channels;
 	char suffix[MAX_NAME_SIZE + 8];
+	int calib_bias;
 
 	if (sensor_count == MAX_SENSORS) {
 		ALOGE("Too many sensors!\n");
@@ -81,14 +440,17 @@ static void add_sensor (int dev_num, int catalog_index, int use_polling)
 
 	s = sensor_count;
 
-	sensor_info[s].dev_num		= dev_num;
-	sensor_info[s].catalog_index	= catalog_index;
+	sensor[s].dev_num	= dev_num;
+	sensor[s].catalog_index	= catalog_index;
+	sensor[s].type		= sensor_type;
+	sensor[s].mode		= mode;
+
+        num_channels = sensor_catalog[catalog_index].num_channels;
 
-        if (use_polling)
-                sensor_info[s].num_channels = 0;
+        if (mode == MODE_POLL)
+                sensor[s].num_channels = 0;
         else
-                sensor_info[s].num_channels =
-                                sensor_catalog[catalog_index].num_channels;
+                sensor[s].num_channels = num_channels;
 
 	prefix = sensor_catalog[catalog_index].tag;
 
@@ -96,7 +458,7 @@ static void add_sensor (int dev_num, int catalog_index, int use_polling)
 	 * receiving the illumination sensor calibration inputs from
 	 * the Android properties and setting it within sysfs
 	 */
-	if (sensor_catalog[catalog_index].type == SENSOR_TYPE_LIGHT) {
+	if (sensor_type == SENSOR_TYPE_LIGHT) {
 		retval = sensor_get_illumincalib(s);
                 if (retval > 0) {
 			sprintf(sysfs_path, ILLUMINATION_CALIBPATH, dev_num);
@@ -104,40 +466,102 @@ static void add_sensor (int dev_num, int catalog_index, int use_polling)
                 }
 	}
 
+        /*
+         * See if we have optional calibration biases for each of the channels of this sensor. These would be expressed using properties like
+         * iio.accel.y.calib_bias = -1, or possibly something like iio.temp.calib_bias if the sensor has a single channel. This value gets stored in the
+         * relevant calibbias sysfs file if that file can be located and then used internally by the iio sensor driver.
+         */
+
+        if (num_channels) {
+		for (c = 0; c < num_channels; c++) {
+			ch_name = sensor_catalog[catalog_index].channel[c].name;
+			sprintf(suffix, "%s.calib_bias", ch_name);
+			if (!sensor_get_prop(s, suffix, &calib_bias) && calib_bias) {
+				sprintf(suffix, "%s_%s", prefix, sensor_catalog[catalog_index].channel[c].name);
+				sprintf(sysfs_path, SENSOR_CALIB_BIAS_PATH, dev_num, suffix);
+				sysfs_write_int(sysfs_path, calib_bias);
+			}
+		}
+        } else
+		if (!sensor_get_prop(s, "calib_bias", &calib_bias) && calib_bias) {
+				sprintf(sysfs_path, SENSOR_CALIB_BIAS_PATH, dev_num, prefix);
+				sysfs_write_int(sysfs_path, calib_bias);
+			}
+
 	/* Read name attribute, if available */
 	sprintf(sysfs_path, NAME_PATH, dev_num);
-	sysfs_read_str(sysfs_path, sensor_info[s].internal_name, MAX_NAME_SIZE);
+	sysfs_read_str(sysfs_path, sensor[s].internal_name, MAX_NAME_SIZE);
 
 	/* See if we have general offsets and scale values for this sensor */
 
 	sprintf(sysfs_path, SENSOR_OFFSET_PATH, dev_num, prefix);
-	sysfs_read_float(sysfs_path, &sensor_info[s].offset);
+	sysfs_read_float(sysfs_path, &sensor[s].offset);
+
+	sprintf(sysfs_path, SENSOR_SCALE_PATH, dev_num, prefix);
+	if (!sensor_get_fl_prop(s, "scale", &scale)) {
+		/*
+		 * There is a chip preferred scale specified,
+		 * so try to store it in sensor's scale file
+		 */
+		if (sysfs_write_float(sysfs_path, scale) == -1 && errno == ENOENT) {
+			ALOGE("Failed to store scale[%g] into %s - file is missing", scale, sysfs_path);
+			/* Store failed, try to store the scale into channel specific file */
+	                for (c = 0; c < num_channels; c++)
+		        {
+			        sprintf(sysfs_path, BASE_PATH "%s", dev_num,
+					sensor_catalog[catalog_index].channel[c].scale_path);
+				if (sysfs_write_float(sysfs_path, scale) == -1)
+					ALOGE("Failed to store scale[%g] into %s", scale, sysfs_path);
+                        }
+                }
+	}
 
 	sprintf(sysfs_path, SENSOR_SCALE_PATH, dev_num, prefix);
 	if (!sysfs_read_float(sysfs_path, &scale)) {
-                sensor_info[s].scale = scale;
-		ALOGI("Scale path:%s scale:%f dev_num:%d\n",
+                sensor[s].scale = scale;
+		ALOGV("Scale path:%s scale:%g dev_num:%d\n",
                                         sysfs_path, scale, dev_num);
 	} else {
-                sensor_info[s].scale = 1;
+                sensor[s].scale = 1;
 
                 /* Read channel specific scale if any*/
-                for (c = 0; c < sensor_catalog[catalog_index].num_channels; c++)
+                for (c = 0; c < num_channels; c++)
                 {
                         sprintf(sysfs_path, BASE_PATH "%s", dev_num,
                            sensor_catalog[catalog_index].channel[c].scale_path);
 
                         if (!sysfs_read_float(sysfs_path, &scale)) {
-                                sensor_info[s].channel[c].scale = scale;
-			        sensor_info[s].scale = 0;
+                                sensor[s].channel[c].scale = scale;
+			        sensor[s].scale = 0;
 
-			        ALOGI(  "Scale path:%s "
-					"channel scale:%f dev_num:%d\n",
+			        ALOGV(  "Scale path:%s "
+					"channel scale:%g dev_num:%d\n",
                                         sysfs_path, scale, dev_num);
                         }
                 }
         }
 
+        /* Set default scaling - if num_channels is zero, we have one channel */
+
+	sensor[s].channel[0].opt_scale = 1;
+
+	for (c = 1; c < num_channels; c++)
+		sensor[s].channel[c].opt_scale = 1;
+
+	for (c = 0; c < num_channels; c++) {
+		/* Check the presence of the channel's input_path */
+		sprintf(sysfs_path, BASE_PATH "%s", dev_num,
+			sensor_catalog[catalog_index].channel[c].input_path);
+		sensor[s].channel[c].input_path_present = (access(sysfs_path, R_OK) != -1);
+		/* Check the presence of the channel's raw_path */
+		sprintf(sysfs_path, BASE_PATH "%s", dev_num,
+			sensor_catalog[catalog_index].channel[c].raw_path);
+		sensor[s].channel[c].raw_path_present = (access(sysfs_path, R_OK) != -1);
+	}
+
+	/* Read ACPI _PLD attributes for this sensor, if there are any */
+	decode_placement_information(dev_num, num_channels, s);
+
         /*
          * See if we have optional correction scaling factors for each of the
          * channels of this sensor. These would be expressed using properties
@@ -146,188 +570,92 @@ static void add_sensor (int dev_num, int catalog_index, int use_polling)
          * for all types of sensors, and whatever transform is selected, on top
          * of any previous conversions.
          */
-        num_channels = sensor_catalog[catalog_index].num_channels;
 
         if (num_channels) {
 		for (c = 0; c < num_channels; c++) {
-			opt_scale = 1;
-
 			ch_name = sensor_catalog[catalog_index].channel[c].name;
 			sprintf(suffix, "%s.opt_scale", ch_name);
-			sensor_get_fl_prop(s, suffix, &opt_scale);
-
-			sensor_info[s].channel[c].opt_scale = opt_scale;
+			if (!sensor_get_fl_prop(s, suffix, &opt_scale))
+				sensor[s].channel[c].opt_scale = opt_scale;
 		}
-        } else {
-		opt_scale = 1;
-		sensor_get_fl_prop(s, "opt_scale", &opt_scale);
-		sensor_info[s].channel[0].opt_scale = opt_scale;
-        }
+        } else
+		if (!sensor_get_fl_prop(s, "opt_scale", &opt_scale))
+			sensor[s].channel[0].opt_scale = opt_scale;
 
-	/* Initialize Android-visible descriptor */
-	sensor_desc[s].name		= sensor_get_name(s);
-	sensor_desc[s].vendor		= sensor_get_vendor(s);
-	sensor_desc[s].version		= sensor_get_version(s);
-	sensor_desc[s].handle		= s;
-	sensor_desc[s].type		= sensor_type;
-	sensor_desc[s].maxRange		= sensor_get_max_range(s);
-	sensor_desc[s].resolution	= sensor_get_resolution(s);
-	sensor_desc[s].power		= sensor_get_power(s);
-	sensor_desc[s].stringType = sensor_get_string_type(s);
+	populate_descriptors(s, sensor_type);
 
-	/* None of our supported sensors requires a special permission.
-	*  If this will be the case we should implement a sensor_get_perm
-	*/
-	sensor_desc[s].requiredPermission = "";
-	sensor_desc[s].flags = sensor_get_flags(s);
+	/* Populate the quirks array */
+	sensor_get_quirks(s);
 
-	if (sensor_info[s].internal_name[0] == '\0') {
+	if (sensor[s].internal_name[0] == '\0') {
 		/*
 		 * In case the kernel-mode driver doesn't expose a name for
 		 * the iio device, use (null)-dev%d as the trigger name...
 		 * This can be considered a kernel-mode iio driver bug.
 		 */
 		ALOGW("Using null trigger on sensor %d (dev %d)\n", s, dev_num);
-		strcpy(sensor_info[s].internal_name, "(null)");
+		strcpy(sensor[s].internal_name, "(null)");
 	}
 
-	if (sensor_catalog[catalog_index].type == SENSOR_TYPE_GYROSCOPE ||
-		sensor_catalog[catalog_index].type == SENSOR_TYPE_GYROSCOPE_UNCALIBRATED) {
-		struct gyro_cal* calibration_data = calloc(1, sizeof(struct gyro_cal));
-		sensor_info[s].cal_data = calibration_data;
-	}
+	switch (sensor_type) {
+		case SENSOR_TYPE_ACCELEROMETER:
+			/* Only engage accelerometer bias compensation if really needed */
+			if (sensor_get_quirks(s) & QUIRK_BIASED)
+				sensor[s].cal_data = calloc(1, sizeof(accel_cal_t));
+			break;
+
+			case SENSOR_TYPE_GYROSCOPE:
+			sensor[s].cal_data = malloc(sizeof(gyro_cal_t));
+			break;
 
-	if (sensor_catalog[catalog_index].type == SENSOR_TYPE_MAGNETIC_FIELD) {
-		struct compass_cal* calibration_data = calloc(1, sizeof(struct compass_cal));
-		sensor_info[s].cal_data = calibration_data;
+		case SENSOR_TYPE_MAGNETIC_FIELD:
+			sensor[s].cal_data = malloc(sizeof(compass_cal_t));
+			break;
 	}
 
+	sensor[s].max_cal_level = sensor_get_cal_steps(s);
+
 	/* Select one of the available sensor sample processing styles */
 	select_transform(s);
 
 	/* Initialize fields related to sysfs reads offloading */
-	sensor_info[s].thread_data_fd[0]  = -1;
-	sensor_info[s].thread_data_fd[1]  = -1;
-	sensor_info[s].acquisition_thread = -1;
+	sensor[s].thread_data_fd[0]  = -1;
+	sensor[s].thread_data_fd[1]  = -1;
+	sensor[s].acquisition_thread = -1;
 
 	/* Check if we have a special ordering property on this sensor */
-	if (sensor_get_order(s, sensor_info[s].order))
-		sensor_info[s].quirks |= QUIRK_FIELD_ORDERING;
-
-	sensor_count++;
-}
-
-
-static void discover_poll_sensors (int dev_num, char map[CATALOG_SIZE])
-{
-	char base_dir[PATH_MAX];
-	DIR *dir;
-	struct dirent *d;
-	unsigned int i;
-        int c;
-
-	memset(map, 0, CATALOG_SIZE);
-
-	snprintf(base_dir, sizeof(base_dir), BASE_PATH, dev_num);
-
-	dir = opendir(base_dir);
-	if (!dir) {
-		return;
-	}
-
-	/* Enumerate entries in this iio device's base folder */
-
-	while ((d = readdir(dir))) {
-		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
-			continue;
-
-		/* If the name matches a catalog entry, flag it */
-		for (i = 0; i<CATALOG_SIZE; i++) {
-		/* This will be added separately later */
-		if (sensor_catalog[i].type == SENSOR_TYPE_GYROSCOPE_UNCALIBRATED)
-			continue;
-		for (c=0; c<sensor_catalog[i].num_channels; c++)
-			if (!strcmp(d->d_name,sensor_catalog[i].channel[c].raw_path) ||
-				!strcmp(d->d_name, sensor_catalog[i].channel[c].input_path)) {
-					map[i] = 1;
-					break;
-			}
-		}
-	}
-
-	closedir(dir);
-}
-
-
-static void discover_trig_sensors (int dev_num, char map[CATALOG_SIZE])
-{
-	char scan_elem_dir[PATH_MAX];
-	DIR *dir;
-	struct dirent *d;
-	unsigned int i;
-
-	memset(map, 0, CATALOG_SIZE);
-
-	/* Enumerate entries in this iio device's scan_elements folder */
-
-	snprintf(scan_elem_dir, sizeof(scan_elem_dir), CHANNEL_PATH, dev_num);
-
-	dir = opendir(scan_elem_dir);
-	if (!dir) {
-		return;
-	}
+	if (sensor_get_order(s, sensor[s].order))
+		sensor[s].quirks |= QUIRK_FIELD_ORDERING;
 
-	while ((d = readdir(dir))) {
-		if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
-			continue;
+	sensor[s].needs_enable = get_needs_enable(dev_num, sensor_catalog[catalog_index].tag);
 
-		/* Compare en entry to known ones and create matching sensors */
-
-		for (i = 0; i<CATALOG_SIZE; i++) {
-			if (sensor_catalog[i].type == SENSOR_TYPE_GYROSCOPE_UNCALIBRATED)
-				continue;
-			if (!strcmp(d->d_name,
-					sensor_catalog[i].channel[0].en_path)) {
-					map[i] = 1;
-					break;
-			}
-		}
-	}
-
-	closedir(dir);
+	sensor_count++;
 }
 
-
-static void orientation_sensor_check(void)
+static void virtual_sensors_check (void)
 {
-	/*
-	 * If we have accel + gyro + magn but no rotation vector sensor,
-	 * SensorService replaces the HAL provided orientation sensor by the
-	 * AOSP version... provided we report one. So initialize a virtual
-	 * orientation sensor with zero values, which will get replaced. See:
-	 * frameworks/native/services/sensorservice/SensorService.cpp, looking
-	 * for SENSOR_TYPE_ROTATION_VECTOR; that code should presumably fall
-	 * back to mUserSensorList.add instead of replaceAt, but accommodate it.
-	 */
-
 	int i;
 	int has_acc = 0;
 	int has_gyr = 0;
 	int has_mag = 0;
 	int has_rot = 0;
 	int has_ori = 0;
-	int catalog_size = CATALOG_SIZE;
+	int gyro_cal_idx = 0;
+	int magn_cal_idx = 0;
+	unsigned int j;
 
 	for (i=0; i<sensor_count; i++)
-		switch (sensor_catalog[sensor_info[i].catalog_index].type) {
+		switch (sensor[i].type) {
 			case SENSOR_TYPE_ACCELEROMETER:
 				has_acc = 1;
 				break;
 			case SENSOR_TYPE_GYROSCOPE:
 				has_gyr = 1;
+				gyro_cal_idx = i;
 				break;
 			case SENSOR_TYPE_MAGNETIC_FIELD:
 				has_mag = 1;
+				magn_cal_idx = i;
 				break;
 			case SENSOR_TYPE_ORIENTATION:
 				has_ori = 1;
@@ -337,71 +665,76 @@ static void orientation_sensor_check(void)
 				break;
 		}
 
-	if (has_acc && has_gyr && has_mag && !has_rot && !has_ori)
-		for (i=0; i<catalog_size; i++)
-			if (sensor_catalog[i].type == SENSOR_TYPE_ORIENTATION) {
-				ALOGI("Adding placeholder orientation sensor");
-				add_sensor(0, i, 1);
+	for (j=0; j<catalog_size; j++)
+		switch (sensor_catalog[j].type) {
+			/*
+			 * If we have accel + gyro + magn but no rotation vector sensor,
+			 * SensorService replaces the HAL provided orientation sensor by the
+			 * AOSP version... provided we report one. So initialize a virtual
+			 * orientation sensor with zero values, which will get replaced. See:
+			 * frameworks/native/services/sensorservice/SensorService.cpp, looking
+			 * for SENSOR_TYPE_ROTATION_VECTOR; that code should presumably fall
+			 * back to mUserSensorList.add instead of replaceAt, but accommodate it.
+			 */
+
+			case SENSOR_TYPE_ORIENTATION:
+				if (has_acc && has_gyr && has_mag && !has_rot && !has_ori)
+					add_sensor(0, j, MODE_POLL);
 				break;
-			}
+			case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED:
+				if (has_gyr) {
+					sensor[sensor_count].base_count = 1;
+					sensor[sensor_count].base[0] = gyro_cal_idx;
+					add_virtual_sensor(j);
+				}
+				break;
+			case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED:
+				if (has_mag) {
+					sensor[sensor_count].base_count = 1;
+					sensor[sensor_count].base[0] = magn_cal_idx;
+					add_virtual_sensor(j);
+				}
+				break;
+			default:
+				break;
+		}
 }
 
-static void uncalibrated_gyro_check (void)
+
+static void propose_new_trigger (int s, char trigger_name[MAX_NAME_SIZE],
+				 int sensor_name_len)
 {
-	unsigned int has_gyr = 0;
-	unsigned int dev_num;
-	int i, c;
-	unsigned int is_poll_sensor;
-
-	int cal_idx = 0;
-	int uncal_idx = 0;
-
-	/* Checking to see if we have a gyroscope - we can only have uncal if we have the base sensor */
-	for (i=0; i < sensor_count; i++)
-		if(sensor_catalog[sensor_info[i].catalog_index].type == SENSOR_TYPE_GYROSCOPE)
-		{
-			has_gyr=1;
-			dev_num = sensor_info[i].dev_num;
-			is_poll_sensor = !sensor_info[i].num_channels;
-			cal_idx = i;
-			break;
-		}
+	/*
+	 * A new trigger has been enumerated for this sensor. Check if it makes sense to use it over the currently selected one,
+	 *  and select it if it is so. The format is something like sensor_name-dev0.
+	 */
+
+	const char *suffix = trigger_name + sensor_name_len + 1;
+
+	/* dev is the default, and lowest priority; no need to update */
+	if (!memcmp(suffix, "dev", 3))
+		return;
+
+	/* If we found any-motion trigger, record it */
+
+	if (!memcmp(suffix, "any-motion-", 11)) {
+		strcpy(sensor[s].motion_trigger_name, trigger_name);
+		return;
+	}
 
 	/*
-	 * If we have a gyro we can add the uncalibrated sensor of the same type and
-	 * on the same dev_num. We will save indexes for easy finding and also save the
-	 * channel specific information.
+	 * It's neither the default "dev" nor an "any-motion" one. Make sure we use this though, as we may not have any other indication of the name
+	 * of the trigger to use with this sensor.
 	 */
-	if (has_gyr)
-		for (i=0; i<CATALOG_SIZE; i++)
-			if (sensor_catalog[i].type == SENSOR_TYPE_GYROSCOPE_UNCALIBRATED) {
-				add_sensor(dev_num, i, is_poll_sensor);
-
-				uncal_idx = sensor_count - 1; /* Just added uncalibrated sensor */
-
-				/* Similar to build_sensor_report_maps */
-				for (c = 0; c < sensor_info[uncal_idx].num_channels; c++)
-				{
-					memcpy( &(sensor_info[uncal_idx].channel[c].type_spec),
-						&(sensor_info[cal_idx].channel[c].type_spec),
-						sizeof(sensor_info[uncal_idx].channel[c].type_spec));
-					sensor_info[uncal_idx].channel[c].type_info = sensor_info[cal_idx].channel[c].type_info;
-					sensor_info[uncal_idx].channel[c].offset    = sensor_info[cal_idx].channel[c].offset;
-					sensor_info[uncal_idx].channel[c].size      = sensor_info[cal_idx].channel[c].size;
-				}
-				sensor_info[uncal_idx].pair_idx = cal_idx;
-				sensor_info[cal_idx].pair_idx = uncal_idx;
-				break;
-			}
+	strcpy(sensor[s].init_trigger_name, trigger_name);
 }
 
+
 static void update_sensor_matching_trigger_name (char name[MAX_NAME_SIZE])
 {
 	/*
-	 * Check if we have a sensor matching the specified trigger name,
-	 * which should then begin with the sensor name, and end with a number
-	 * equal to the iio device number the sensor is associated to. If so,
-	 * update the string we're going to write to trigger/current_trigger
+	 * Check if we have a sensor matching the specified trigger name, which should then begin with the sensor name, and end with a number
+	 * equal to the iio device number the sensor is associated to. If so, update the string we're going to write to trigger/current_trigger
 	 * when enabling this sensor.
 	 */
 
@@ -409,10 +742,10 @@ static void update_sensor_matching_trigger_name (char name[MAX_NAME_SIZE])
 	int dev_num;
 	int len;
 	char* cursor;
+	int sensor_name_len;
 
 	/*
-	 * First determine the iio device number this trigger refers to. We
-	 * expect the last few characters (typically one) of the trigger name
+	 * First determine the iio device number this trigger refers to. We expect the last few characters (typically one) of the trigger name
 	 * to be this number, so perform a few checks.
 	 */
 	len = strnlen(name, MAX_NAME_SIZE);
@@ -434,13 +767,14 @@ static void update_sensor_matching_trigger_name (char name[MAX_NAME_SIZE])
 
 	/* See if that matches a sensor */
 	for (s=0; s<sensor_count; s++)
-		if (sensor_info[s].dev_num == dev_num &&
-			!strncmp(name, sensor_info[s].internal_name,
-				strlen(sensor_info[s].internal_name))) {
-				/* Update sensor structure and return */
-				strcpy(sensor_info[s].trigger_name, name);
-				return;
-			}
+		if (sensor[s].dev_num == dev_num) {
+
+			sensor_name_len = strlen(sensor[s].internal_name);
+
+			if (!strncmp(name, sensor[s].internal_name, sensor_name_len))
+				/* Switch to new trigger if appropriate */
+				propose_new_trigger(s, name, sensor_name_len);
+		}
 }
 
 
@@ -448,15 +782,13 @@ static void setup_trigger_names (void)
 {
 	char filename[PATH_MAX];
 	char buf[MAX_NAME_SIZE];
-	int len;
 	int s;
 	int trigger;
 	int ret;
 
 	/* By default, use the name-dev convention that most drivers use */
 	for (s=0; s<sensor_count; s++)
-		snprintf(sensor_info[s].trigger_name, MAX_NAME_SIZE, "%s-dev%d",
-			sensor_info[s].internal_name, sensor_info[s].dev_num);
+		snprintf(sensor[s].init_trigger_name, MAX_NAME_SIZE, "%s-dev%d", sensor[s].internal_name, sensor[s].dev_num);
 
 	/* Now have a look to /sys/bus/iio/devices/triggerX entries */
 
@@ -469,29 +801,37 @@ static void setup_trigger_names (void)
 		if (ret < 0)
 			break;
 
+		/* Record initial and any-motion triggers names */
 		update_sensor_matching_trigger_name(buf);
 	}
 
+	/*
+	 * Certain drivers expose only motion triggers even though they should be continous. For these, use the default trigger name as the motion
+	 * trigger. The code generating intermediate events is dependent on motion_trigger_name being set to a non empty string.
+	 */
+
 	for (s=0; s<sensor_count; s++)
-		if (sensor_info[s].num_channels) {
-			ALOGI(	"Sensor %d (%s) using iio trigger %s\n", s,
-				sensor_info[s].friendly_name,
-				sensor_info[s].trigger_name);
+		if ((sensor[s].quirks & QUIRK_TERSE_DRIVER) && sensor[s].motion_trigger_name[0] == '\0')
+			strcpy(sensor[s].motion_trigger_name, sensor[s].init_trigger_name);
+
+	for (s=0; s<sensor_count; s++)
+		if (sensor[s].mode == MODE_TRIGGER) {
+			ALOGI("Sensor %d (%s) default trigger: %s\n", s, sensor[s].friendly_name, sensor[s].init_trigger_name);
+			if (sensor[s].motion_trigger_name[0])
+				ALOGI("Sensor %d (%s) motion trigger: %s\n", s, sensor[s].friendly_name, sensor[s].motion_trigger_name);
 		}
 }
 
-
 void enumerate_sensors (void)
 {
 	/*
-	 * Discover supported sensors and allocate control structures for them.
-	 * Multiple sensors can potentially rely on a single iio device (each
-	 * using their own channels). We can't have multiple sensors of the same
-	 * type on the same device. In case of detection as both a poll-mode
+	 * Discover supported sensors and allocate control structures for them. Multiple sensors can potentially rely on a single iio device (each
+	 * using their own channels). We can't have multiple sensors of the same type on the same device. In case of detection as both a poll-mode
 	 * and trigger-based sensor, use the trigger usage mode.
 	 */
-	char poll_sensors[CATALOG_SIZE];
-	char trig_sensors[CATALOG_SIZE];
+	char poll_sensors[catalog_size];
+	char trig_sensors[catalog_size];
+	char event_sensors[catalog_size];
 	int dev_num;
 	unsigned int i;
 	int trig_found;
@@ -499,21 +839,28 @@ void enumerate_sensors (void)
 	for (dev_num=0; dev_num<MAX_DEVICES; dev_num++) {
 		trig_found = 0;
 
-		discover_poll_sensors(dev_num, poll_sensors);
-		discover_trig_sensors(dev_num, trig_sensors);
+		discover_sensors(dev_num, BASE_PATH, poll_sensors, check_poll_sensors);
+		discover_sensors(dev_num, CHANNEL_PATH, trig_sensors, check_trig_sensors);
+		discover_sensors(dev_num, EVENTS_PATH, event_sensors, check_event_sensors);
 
-		for (i=0; i<CATALOG_SIZE; i++)
+		for (i=0; i<catalog_size; i++) {
+			if (event_sensors[i]) {
+				add_sensor(dev_num, i, MODE_EVENT);
+				continue;
+			}
 			if (trig_sensors[i]) {
-				add_sensor(dev_num, i, 0);
+				add_sensor(dev_num, i, MODE_TRIGGER);
 				trig_found = 1;
+				continue;
+			}
+			if (poll_sensors[i]) {
+				add_sensor(dev_num, i, MODE_POLL);
+				continue;
 			}
-			else
-				if (poll_sensors[i])
-					add_sensor(dev_num, i, 1);
+		}
 
-		if (trig_found) {
+		if (trig_found)
 			build_sensor_report_maps(dev_num);
-		}
 	}
 
 	ALOGI("Discovered %d sensors\n", sensor_count);
@@ -521,40 +868,27 @@ void enumerate_sensors (void)
 	/* Set up default - as well as custom - trigger names */
 	setup_trigger_names();
 
-	/* Make sure Android fall backs to its own orientation sensor */
-	orientation_sensor_check();
-
-	/* Create the uncalibrated counterpart to the compensated gyroscope;
-	 * This is is a new sensor type in Android 4.4 */
-	uncalibrated_gyro_check();
+	virtual_sensors_check();
 }
 
 
 void delete_enumeration_data (void)
 {
-
 	int i;
 	for (i = 0; i < sensor_count; i++)
-	switch (sensor_catalog[sensor_info[i].catalog_index].type) {
-		case SENSOR_TYPE_MAGNETIC_FIELD:
-		case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED:
-		case SENSOR_TYPE_GYROSCOPE:
-			if (sensor_info[i].cal_data != NULL) {
-				free(sensor_info[i].cal_data);
-				sensor_info[i].cal_data = NULL;
-				sensor_info[i].calibrated = 0;
-			}
-			break;
-		default:
-			break;
-	}
+		if (sensor[i].cal_data) {
+			free(sensor[i].cal_data);
+			sensor[i].cal_data = NULL;
+			sensor[i].cal_level = 0;
+		}
+
 	/* Reset sensor count */
 	sensor_count = 0;
 }
 
 
-int get_sensors_list(	struct sensors_module_t* module,
-			struct sensor_t const** list)
+int get_sensors_list (__attribute__((unused)) struct sensors_module_t* module,
+		      struct sensor_t const** list)
 {
 	*list = sensor_desc;
 	return sensor_count;