2 * Copyright (C) 2014-2015 Intel Corporation.
10 #include <hardware/sensors.h>
11 #include "enumeration.h"
12 #include "description.h"
14 #include "transform.h"
15 #include "description.h"
17 #include "calibration.h"
20 * This table maps syfs entries in scan_elements directories to sensor types,
21 * and will also be used to determine other sysfs names as well as the iio
22 * device number associated to a specific sensor.
26 * We duplicate entries for the uncalibrated types after their respective base
27 * sensor. This is because all sensor entries must have an associated catalog entry
28 * and also because when only the uncal sensor is active it needs to take it's data
29 * from the same iio device as the base one.
32 sensor_catalog_entry_t sensor_catalog[] = {
35 .type = SENSOR_TYPE_ACCELEROMETER,
39 { DECLARE_NAMED_CHANNEL("accel", "x") },
40 { DECLARE_NAMED_CHANNEL("accel", "y") },
41 { DECLARE_NAMED_CHANNEL("accel", "z") },
46 .type = SENSOR_TYPE_GYROSCOPE,
50 { DECLARE_NAMED_CHANNEL("anglvel", "x") },
51 { DECLARE_NAMED_CHANNEL("anglvel", "y") },
52 { DECLARE_NAMED_CHANNEL("anglvel", "z") },
57 .type = SENSOR_TYPE_MAGNETIC_FIELD,
61 { DECLARE_NAMED_CHANNEL("magn", "x") },
62 { DECLARE_NAMED_CHANNEL("magn", "y") },
63 { DECLARE_NAMED_CHANNEL("magn", "z") },
68 .type = SENSOR_TYPE_INTERNAL_INTENSITY,
72 { DECLARE_NAMED_CHANNEL("intensity", "both") },
77 .type = SENSOR_TYPE_INTERNAL_ILLUMINANCE,
81 { DECLARE_GENERIC_CHANNEL("illuminance") },
86 .type = SENSOR_TYPE_ORIENTATION,
90 { DECLARE_NAMED_CHANNEL("incli", "x") },
91 { DECLARE_NAMED_CHANNEL("incli", "y") },
92 { DECLARE_NAMED_CHANNEL("incli", "z") },
97 .type = SENSOR_TYPE_ROTATION_VECTOR,
101 { DECLARE_NAMED_CHANNEL("rot", "quat_x") },
102 { DECLARE_NAMED_CHANNEL("rot", "quat_y") },
103 { DECLARE_NAMED_CHANNEL("rot", "quat_z") },
104 { DECLARE_NAMED_CHANNEL("rot", "quat_w") },
109 .type = SENSOR_TYPE_AMBIENT_TEMPERATURE,
113 { DECLARE_GENERIC_CHANNEL("temp") },
118 .type = SENSOR_TYPE_PROXIMITY,
122 { DECLARE_GENERIC_CHANNEL("proximity") },
127 .type = SENSOR_TYPE_GYROSCOPE_UNCALIBRATED,
131 { DECLARE_GENERIC_CHANNEL("") },
137 .type = SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED,
141 { DECLARE_GENERIC_CHANNEL("") },
146 .type = SENSOR_TYPE_STEP_COUNTER,
150 { DECLARE_GENERIC_CHANNEL("steps") },
155 .type = SENSOR_TYPE_STEP_DETECTOR,
160 DECLARE_VOID_CHANNEL("steps")
163 { DECLARE_NAMED_EVENT("steps", "change") },
170 .type = SENSOR_TYPE_PROXIMITY,
175 DECLARE_VOID_CHANNEL("proximity0")
178 { DECLARE_EVENT("proximity0", "_", "", "", "thresh", "_", "either") },
182 DECLARE_VOID_CHANNEL("proximity1")
185 { DECLARE_EVENT("proximity1", "_", "", "", "thresh", "_", "either") },
189 DECLARE_VOID_CHANNEL("proximity2")
192 { DECLARE_EVENT("proximity2", "_", "", "", "thresh", "_", "either") },
196 DECLARE_VOID_CHANNEL("proximity3")
199 { DECLARE_EVENT("proximity3", "_", "", "", "thresh", "_", "either") },
206 unsigned int catalog_size = ARRAY_SIZE(sensor_catalog);
208 /* ACPI PLD (physical location of device) definitions, as used with sensors */
210 #define PANEL_FRONT 4
213 /* We equate sensor handles to indices in these tables */
215 struct sensor_t sensor_desc[MAX_SENSORS]; /* Android-level descriptors */
216 sensor_info_t sensor[MAX_SENSORS]; /* Internal descriptors */
217 int sensor_count; /* Detected sensors */
220 /* if the sensor has an _en attribute, we need to enable it */
221 int get_needs_enable(int dev_num, const char *tag)
223 char sysfs_path[PATH_MAX];
226 sprintf(sysfs_path, SENSOR_ENABLE_PATH, dev_num, tag);
228 fd = open(sysfs_path, O_RDWR);
236 static void setup_properties_from_pld (int s, int panel, int rotation,
240 * Generate suitable order and opt_scale directives from the PLD panel
241 * and rotation codes we got. This can later be superseded by the usual
242 * properties if necessary. Eventually we'll need to replace these
243 * mechanisms by a less convoluted one, such as a 3x3 placement matrix.
250 int angle = rotation * 45;
252 /* Only deal with 3 axis chips for now */
253 if (num_channels < 3)
256 if (panel == PANEL_BACK) {
257 /* Chip placed on the back panel ; negate x and z */
263 case 90: /* 90° clockwise: negate y then swap x,y */
268 case 180: /* Upside down: negate x and y */
273 case 270: /* 90° counter clockwise: negate x then swap x,y */
280 sensor[s].order[0] = 1;
281 sensor[s].order[1] = 0;
282 sensor[s].order[2] = 2;
283 sensor[s].quirks |= QUIRK_FIELD_ORDERING;
286 sensor[s].channel[0].opt_scale = x;
287 sensor[s].channel[1].opt_scale = y;
288 sensor[s].channel[2].opt_scale = z;
292 static int is_valid_pld (int panel, int rotation)
294 if (panel != PANEL_FRONT && panel != PANEL_BACK) {
295 ALOGW("Unhandled PLD panel spec: %d\n", panel);
299 /* Only deal with 90° rotations for now */
300 if (rotation < 0 || rotation > 7 || (rotation & 1)) {
301 ALOGW("Unhandled PLD rotation spec: %d\n", rotation);
309 static int read_pld_from_properties (int s, int* panel, int* rotation)
313 if (sensor_get_prop(s, "panel", &p))
316 if (sensor_get_prop(s, "rotation", &r))
319 if (!is_valid_pld(p, r))
325 ALOGI("S%d PLD from properties: panel=%d, rotation=%d\n", s, p, r);
331 static int read_pld_from_sysfs (int s, int dev_num, int* panel, int* rotation)
333 char sysfs_path[PATH_MAX];
336 sprintf(sysfs_path, BASE_PATH "../firmware_node/pld/panel", dev_num);
338 if (sysfs_read_int(sysfs_path, &p))
341 sprintf(sysfs_path, BASE_PATH "../firmware_node/pld/rotation", dev_num);
343 if (sysfs_read_int(sysfs_path, &r))
346 if (!is_valid_pld(p, r))
352 ALOGI("S%d PLD from sysfs: panel=%d, rotation=%d\n", s, p, r);
358 static void decode_placement_information (int dev_num, int num_channels, int s)
361 * See if we have optional "physical location of device" ACPI tags.
362 * We're only interested in panel and rotation specifiers. Use the
363 * .panel and .rotation properties in priority, and the actual ACPI
364 * values as a second source.
370 if (read_pld_from_properties(s, &panel, &rotation) &&
371 read_pld_from_sysfs(s, dev_num, &panel, &rotation))
372 return; /* No PLD data available */
374 /* Map that to field ordering and scaling mechanisms */
375 setup_properties_from_pld(s, panel, rotation, num_channels);
379 static int map_internal_to_external_type (int sensor_type)
381 /* Most sensors are internally identified using the Android type, but for some we use a different type specification internally */
383 switch (sensor_type) {
384 case SENSOR_TYPE_INTERNAL_ILLUMINANCE:
385 case SENSOR_TYPE_INTERNAL_INTENSITY:
386 return SENSOR_TYPE_LIGHT;
393 static void populate_descriptors (int s, int sensor_type)
395 int32_t min_delay_us;
396 max_delay_t max_delay_us;
398 /* Initialize Android-visible descriptor */
399 sensor_desc[s].name = sensor_get_name(s);
400 sensor_desc[s].vendor = sensor_get_vendor(s);
401 sensor_desc[s].version = sensor_get_version(s);
402 sensor_desc[s].handle = s;
403 sensor_desc[s].type = map_internal_to_external_type(sensor_type);
405 sensor_desc[s].maxRange = sensor_get_max_range(s);
406 sensor_desc[s].resolution = sensor_get_resolution(s);
407 sensor_desc[s].power = sensor_get_power(s);
408 sensor_desc[s].stringType = sensor_get_string_type(s);
410 /* None of our supported sensors requires a special permission */
411 sensor_desc[s].requiredPermission = "";
413 sensor_desc[s].flags = sensor_get_flags(s);
414 sensor_desc[s].minDelay = sensor_get_min_delay(s);
415 sensor_desc[s].maxDelay = sensor_get_max_delay(s);
417 ALOGV("Sensor %d (%s) type(%d) minD(%d) maxD(%d) flags(%2.2x)\n",
418 s, sensor[s].friendly_name, sensor_desc[s].type,
419 sensor_desc[s].minDelay, sensor_desc[s].maxDelay,
420 sensor_desc[s].flags);
422 /* We currently do not implement batching */
423 sensor_desc[s].fifoReservedEventCount = 0;
424 sensor_desc[s].fifoMaxEventCount = 0;
426 min_delay_us = sensor_desc[s].minDelay;
427 max_delay_us = sensor_desc[s].maxDelay;
429 sensor[s].min_supported_rate = max_delay_us ? 1000000.0 / max_delay_us : 1;
430 sensor[s].max_supported_rate = min_delay_us && min_delay_us != -1 ? 1000000.0 / min_delay_us : 0;
434 static void add_virtual_sensor (int catalog_index)
439 if (sensor_count == MAX_SENSORS) {
440 ALOGE("Too many sensors!\n");
444 sensor_type = sensor_catalog[catalog_index].type;
448 sensor[s].is_virtual = 1;
449 sensor[s].catalog_index = catalog_index;
450 sensor[s].type = sensor_type;
452 populate_descriptors(s, sensor_type);
454 /* Initialize fields related to sysfs reads offloading */
455 sensor[s].thread_data_fd[0] = -1;
456 sensor[s].thread_data_fd[1] = -1;
457 sensor[s].acquisition_thread = -1;
463 static int add_sensor (int dev_num, int catalog_index, int mode)
468 char sysfs_path[PATH_MAX];
475 char suffix[MAX_NAME_SIZE + 8];
478 if (sensor_count == MAX_SENSORS) {
479 ALOGE("Too many sensors!\n");
483 sensor_type = sensor_catalog[catalog_index].type;
486 * At this point we could check that the expected sysfs attributes are
487 * present ; that would enable having multiple catalog entries with the
488 * same sensor type, accomodating different sets of sysfs attributes.
493 sensor[s].dev_num = dev_num;
494 sensor[s].catalog_index = catalog_index;
495 sensor[s].type = sensor_type;
496 sensor[s].mode = mode;
498 num_channels = sensor_catalog[catalog_index].num_channels;
500 if (mode == MODE_POLL)
501 sensor[s].num_channels = 0;
503 sensor[s].num_channels = num_channels;
505 /* Populate the quirks array */
506 sensor_get_quirks(s);
508 /* Reject interfaces that may have been disabled through a quirk for this driver */
509 if ((mode == MODE_EVENT && (sensor[s].quirks & QUIRK_NO_EVENT_MODE)) ||
510 (mode == MODE_TRIGGER && (sensor[s].quirks & QUIRK_NO_TRIG_MODE )) ||
511 (mode == MODE_POLL && (sensor[s].quirks & QUIRK_NO_POLL_MODE ))) {
512 memset(&sensor[s], 0, sizeof(sensor[0]));
516 prefix = sensor_catalog[catalog_index].tag;
519 * receiving the illumination sensor calibration inputs from
520 * the Android properties and setting it within sysfs
522 if (sensor_type == SENSOR_TYPE_INTERNAL_ILLUMINANCE) {
523 retval = sensor_get_illumincalib(s);
525 sprintf(sysfs_path, ILLUMINATION_CALIBPATH, dev_num);
526 sysfs_write_int(sysfs_path, retval);
531 * See if we have optional calibration biases for each of the channels of this sensor. These would be expressed using properties like
532 * 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
533 * relevant calibbias sysfs file if that file can be located and then used internally by the iio sensor driver.
537 for (c = 0; c < num_channels; c++) {
538 ch_name = sensor_catalog[catalog_index].channel[c].name;
539 sprintf(suffix, "%s.calib_bias", ch_name);
540 if (!sensor_get_prop(s, suffix, &calib_bias) && calib_bias) {
541 sprintf(suffix, "%s_%s", prefix, sensor_catalog[catalog_index].channel[c].name);
542 sprintf(sysfs_path, SENSOR_CALIB_BIAS_PATH, dev_num, suffix);
543 sysfs_write_int(sysfs_path, calib_bias);
547 if (!sensor_get_prop(s, "calib_bias", &calib_bias) && calib_bias) {
548 sprintf(sysfs_path, SENSOR_CALIB_BIAS_PATH, dev_num, prefix);
549 sysfs_write_int(sysfs_path, calib_bias);
552 /* Read name attribute, if available */
553 sprintf(sysfs_path, NAME_PATH, dev_num);
554 sysfs_read_str(sysfs_path, sensor[s].internal_name, MAX_NAME_SIZE);
556 /* See if we have general offsets and scale values for this sensor */
558 sprintf(sysfs_path, SENSOR_OFFSET_PATH, dev_num, prefix);
559 sysfs_read_float(sysfs_path, &sensor[s].offset);
561 sprintf(sysfs_path, SENSOR_SCALE_PATH, dev_num, prefix);
562 if (!sensor_get_fl_prop(s, "scale", &scale)) {
564 * There is a chip preferred scale specified,
565 * so try to store it in sensor's scale file
567 if (sysfs_write_float(sysfs_path, scale) == -1 && errno == ENOENT) {
568 ALOGE("Failed to store scale[%g] into %s - file is missing", scale, sysfs_path);
569 /* Store failed, try to store the scale into channel specific file */
570 for (c = 0; c < num_channels; c++)
572 sprintf(sysfs_path, BASE_PATH "%s", dev_num,
573 sensor_catalog[catalog_index].channel[c].scale_path);
574 if (sysfs_write_float(sysfs_path, scale) == -1)
575 ALOGE("Failed to store scale[%g] into %s", scale, sysfs_path);
580 sprintf(sysfs_path, SENSOR_SCALE_PATH, dev_num, prefix);
581 if (!sysfs_read_float(sysfs_path, &scale)) {
582 sensor[s].scale = scale;
583 ALOGV("Scale path:%s scale:%g dev_num:%d\n",
584 sysfs_path, scale, dev_num);
588 /* Read channel specific scale if any*/
589 for (c = 0; c < num_channels; c++)
591 sprintf(sysfs_path, BASE_PATH "%s", dev_num,
592 sensor_catalog[catalog_index].channel[c].scale_path);
594 if (!sysfs_read_float(sysfs_path, &scale)) {
595 sensor[s].channel[c].scale = scale;
598 ALOGV( "Scale path:%s "
599 "channel scale:%g dev_num:%d\n",
600 sysfs_path, scale, dev_num);
605 /* Set default scaling - if num_channels is zero, we have one channel */
607 sensor[s].channel[0].opt_scale = 1;
609 for (c = 1; c < num_channels; c++)
610 sensor[s].channel[c].opt_scale = 1;
612 for (c = 0; c < num_channels; c++) {
613 /* Check the presence of the channel's input_path */
614 sprintf(sysfs_path, BASE_PATH "%s", dev_num,
615 sensor_catalog[catalog_index].channel[c].input_path);
616 sensor[s].channel[c].input_path_present = (access(sysfs_path, R_OK) != -1);
617 /* Check the presence of the channel's raw_path */
618 sprintf(sysfs_path, BASE_PATH "%s", dev_num,
619 sensor_catalog[catalog_index].channel[c].raw_path);
620 sensor[s].channel[c].raw_path_present = (access(sysfs_path, R_OK) != -1);
623 /* Read ACPI _PLD attributes for this sensor, if there are any */
624 decode_placement_information(dev_num, num_channels, s);
627 * See if we have optional correction scaling factors for each of the
628 * channels of this sensor. These would be expressed using properties
629 * like iio.accel.y.opt_scale = -1. In case of a single channel we also
630 * support things such as iio.temp.opt_scale = -1. Note that this works
631 * for all types of sensors, and whatever transform is selected, on top
632 * of any previous conversions.
636 for (c = 0; c < num_channels; c++) {
637 ch_name = sensor_catalog[catalog_index].channel[c].name;
638 sprintf(suffix, "%s.opt_scale", ch_name);
639 if (!sensor_get_fl_prop(s, suffix, &opt_scale))
640 sensor[s].channel[c].opt_scale = opt_scale;
643 if (!sensor_get_fl_prop(s, "opt_scale", &opt_scale))
644 sensor[s].channel[0].opt_scale = opt_scale;
647 populate_descriptors(s, sensor_type);
649 if (sensor[s].internal_name[0] == '\0') {
651 * In case the kernel-mode driver doesn't expose a name for
652 * the iio device, use (null)-dev%d as the trigger name...
653 * This can be considered a kernel-mode iio driver bug.
655 ALOGW("Using null trigger on sensor %d (dev %d)\n", s, dev_num);
656 strcpy(sensor[s].internal_name, "(null)");
659 switch (sensor_type) {
660 case SENSOR_TYPE_ACCELEROMETER:
661 /* Only engage accelerometer bias compensation if really needed */
662 if (sensor_get_quirks(s) & QUIRK_BIASED)
663 sensor[s].cal_data = calloc(1, sizeof(accel_cal_t));
666 case SENSOR_TYPE_GYROSCOPE:
667 sensor[s].cal_data = malloc(sizeof(gyro_cal_t));
670 case SENSOR_TYPE_MAGNETIC_FIELD:
671 sensor[s].cal_data = malloc(sizeof(compass_cal_t));
675 sensor[s].max_cal_level = sensor_get_cal_steps(s);
677 /* Select one of the available sensor sample processing styles */
680 /* Initialize fields related to sysfs reads offloading */
681 sensor[s].thread_data_fd[0] = -1;
682 sensor[s].thread_data_fd[1] = -1;
683 sensor[s].acquisition_thread = -1;
685 /* Check if we have a special ordering property on this sensor */
686 if (sensor_get_order(s, sensor[s].order))
687 sensor[s].quirks |= QUIRK_FIELD_ORDERING;
689 sensor[s].needs_enable = get_needs_enable(dev_num, sensor_catalog[catalog_index].tag);
695 static void virtual_sensors_check (void)
703 int gyro_cal_idx = 0;
704 int magn_cal_idx = 0;
707 for (i=0; i<sensor_count; i++)
708 switch (sensor[i].type) {
709 case SENSOR_TYPE_ACCELEROMETER:
712 case SENSOR_TYPE_GYROSCOPE:
716 case SENSOR_TYPE_MAGNETIC_FIELD:
720 case SENSOR_TYPE_ORIENTATION:
723 case SENSOR_TYPE_ROTATION_VECTOR:
728 for (j=0; j<catalog_size; j++)
729 switch (sensor_catalog[j].type) {
731 * If we have accel + gyro + magn but no rotation vector sensor,
732 * SensorService replaces the HAL provided orientation sensor by the
733 * AOSP version... provided we report one. So initialize a virtual
734 * orientation sensor with zero values, which will get replaced. See:
735 * frameworks/native/services/sensorservice/SensorService.cpp, looking
736 * for SENSOR_TYPE_ROTATION_VECTOR; that code should presumably fall
737 * back to mUserSensorList.add instead of replaceAt, but accommodate it.
740 case SENSOR_TYPE_ORIENTATION:
741 if (has_acc && has_gyr && has_mag && !has_rot && !has_ori)
742 add_sensor(0, j, MODE_POLL);
744 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED:
746 sensor[sensor_count].base_count = 1;
747 sensor[sensor_count].base[0] = gyro_cal_idx;
748 add_virtual_sensor(j);
751 case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED:
753 sensor[sensor_count].base_count = 1;
754 sensor[sensor_count].base[0] = magn_cal_idx;
755 add_virtual_sensor(j);
764 static void propose_new_trigger (int s, char trigger_name[MAX_NAME_SIZE],
768 * A new trigger has been enumerated for this sensor. Check if it makes sense to use it over the currently selected one,
769 * and select it if it is so. The format is something like sensor_name-dev0.
772 const char *suffix = trigger_name + sensor_name_len + 1;
774 /* dev is the default, and lowest priority; no need to update */
775 if (!memcmp(suffix, "dev", 3))
778 /* If we found any-motion trigger, record it */
780 if (!memcmp(suffix, "any-motion-", 11)) {
781 strcpy(sensor[s].motion_trigger_name, trigger_name);
786 * 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
787 * of the trigger to use with this sensor.
789 strcpy(sensor[s].init_trigger_name, trigger_name);
793 static void update_sensor_matching_trigger_name (char name[MAX_NAME_SIZE])
796 * Check if we have a sensor matching the specified trigger name, which should then begin with the sensor name, and end with a number
797 * 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
798 * when enabling this sensor.
808 * First determine the iio device number this trigger refers to. We expect the last few characters (typically one) of the trigger name
809 * to be this number, so perform a few checks.
811 len = strnlen(name, MAX_NAME_SIZE);
816 cursor = name + len - 1;
818 if (!isdigit(*cursor))
821 while (len && isdigit(*cursor)) {
826 dev_num = atoi(cursor+1);
828 /* See if that matches a sensor */
829 for (s=0; s<sensor_count; s++)
830 if (sensor[s].dev_num == dev_num) {
832 sensor_name_len = strlen(sensor[s].internal_name);
834 if (!strncmp(name, sensor[s].internal_name, sensor_name_len))
835 /* Switch to new trigger if appropriate */
836 propose_new_trigger(s, name, sensor_name_len);
841 static void setup_trigger_names (void)
843 char filename[PATH_MAX];
844 char buf[MAX_NAME_SIZE];
849 /* By default, use the name-dev convention that most drivers use */
850 for (s=0; s<sensor_count; s++)
851 snprintf(sensor[s].init_trigger_name, MAX_NAME_SIZE, "%s-dev%d", sensor[s].internal_name, sensor[s].dev_num);
853 /* Now have a look to /sys/bus/iio/devices/triggerX entries */
855 for (trigger=0; trigger<MAX_TRIGGERS; trigger++) {
857 snprintf(filename, sizeof(filename), TRIGGER_FILE_PATH,trigger);
859 ret = sysfs_read_str(filename, buf, sizeof(buf));
864 /* Record initial and any-motion triggers names */
865 update_sensor_matching_trigger_name(buf);
869 * Certain drivers expose only motion triggers even though they should be continous. For these, use the default trigger name as the motion
870 * trigger. The code generating intermediate events is dependent on motion_trigger_name being set to a non empty string.
873 for (s=0; s<sensor_count; s++)
874 if ((sensor[s].quirks & QUIRK_TERSE_DRIVER) && sensor[s].motion_trigger_name[0] == '\0')
875 strcpy(sensor[s].motion_trigger_name, sensor[s].init_trigger_name);
877 for (s=0; s<sensor_count; s++)
878 if (sensor[s].mode == MODE_TRIGGER) {
879 ALOGI("Sensor %d (%s) default trigger: %s\n", s, sensor[s].friendly_name, sensor[s].init_trigger_name);
880 if (sensor[s].motion_trigger_name[0])
881 ALOGI("Sensor %d (%s) motion trigger: %s\n", s, sensor[s].friendly_name, sensor[s].motion_trigger_name);
886 static int catalog_index_from_sensor_type (int type)
888 /* Return first matching catalog entry index for selected type */
891 for (i=0; i<catalog_size; i++)
892 if (sensor_catalog[i].type == type)
899 static void post_process_sensor_list (char poll_map[catalog_size], char trig_map[catalog_size], char event_map[catalog_size])
901 int illuminance_cat_index = catalog_index_from_sensor_type(SENSOR_TYPE_INTERNAL_ILLUMINANCE);
902 int intensity_cat_index = catalog_index_from_sensor_type(SENSOR_TYPE_INTERNAL_INTENSITY);
903 int illuminance_found = poll_map[illuminance_cat_index] || trig_map[illuminance_cat_index] || event_map[illuminance_cat_index];
905 /* If an illumimance sensor has been reported */
906 if (illuminance_found) {
907 /* Hide any intensity sensors we can have for the same iio device */
908 poll_map [intensity_cat_index ] = 0;
909 trig_map [intensity_cat_index ] = 0;
910 event_map[intensity_cat_index ] = 0;
916 void enumerate_sensors (void)
919 * Discover supported sensors and allocate control structures for them. Multiple sensors can potentially rely on a single iio device (each
920 * 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
921 * and trigger-based sensor, use the trigger usage mode.
923 char poll_sensors[catalog_size];
924 char trig_sensors[catalog_size];
925 char event_sensors[catalog_size];
930 for (dev_num=0; dev_num<MAX_DEVICES; dev_num++) {
933 discover_sensors(dev_num, BASE_PATH, poll_sensors, check_poll_sensors);
934 discover_sensors(dev_num, CHANNEL_PATH, trig_sensors, check_trig_sensors);
935 discover_sensors(dev_num, EVENTS_PATH, event_sensors, check_event_sensors);
937 /* Hide specific sensor types if appropriate */
938 post_process_sensor_list(poll_sensors, trig_sensors, event_sensors);
940 for (i=0; i<catalog_size; i++) {
941 /* Try using events interface */
942 if (event_sensors[i] && !add_sensor(dev_num, i, MODE_EVENT))
946 if (trig_sensors[i] && !add_sensor(dev_num, i, MODE_TRIGGER)) {
951 /* Try polling otherwise */
953 add_sensor(dev_num, i, MODE_POLL);
957 build_sensor_report_maps(dev_num);
960 ALOGI("Discovered %d sensors\n", sensor_count);
962 /* Set up default - as well as custom - trigger names */
963 setup_trigger_names();
965 virtual_sensors_check();
969 void delete_enumeration_data (void)
972 for (i = 0; i < sensor_count; i++)
973 if (sensor[i].cal_data) {
974 free(sensor[i].cal_data);
975 sensor[i].cal_data = NULL;
976 sensor[i].cal_level = 0;
979 /* Reset sensor count */
984 int get_sensors_list (__attribute__((unused)) struct sensors_module_t* module,
985 struct sensor_t const** list)