2 * Copyright (C) 2014-2015 Intel Corporation.
11 #include <hardware/sensors.h>
12 #include "enumeration.h"
13 #include "description.h"
15 #include "transform.h"
16 #include "description.h"
18 #include "calibration.h"
21 * This table maps syfs entries in scan_elements directories to sensor types,
22 * and will also be used to determine other sysfs names as well as the iio
23 * device number associated to a specific sensor.
27 * We duplicate entries for the uncalibrated types after their respective base
28 * sensor. This is because all sensor entries must have an associated catalog entry
29 * and also because when only the uncal sensor is active it needs to take it's data
30 * from the same iio device as the base one.
33 sensor_catalog_entry_t sensor_catalog[] = {
37 .type = SENSOR_TYPE_ACCELEROMETER,
41 { DECLARE_NAMED_CHANNEL("accel", "x") },
42 { DECLARE_NAMED_CHANNEL("accel", "y") },
43 { DECLARE_NAMED_CHANNEL("accel", "z") },
49 .type = SENSOR_TYPE_GYROSCOPE,
53 { DECLARE_NAMED_CHANNEL("anglvel", "x") },
54 { DECLARE_NAMED_CHANNEL("anglvel", "y") },
55 { DECLARE_NAMED_CHANNEL("anglvel", "z") },
61 .type = SENSOR_TYPE_MAGNETIC_FIELD,
65 { DECLARE_NAMED_CHANNEL("magn", "x") },
66 { DECLARE_NAMED_CHANNEL("magn", "y") },
67 { DECLARE_NAMED_CHANNEL("magn", "z") },
73 .type = SENSOR_TYPE_INTERNAL_INTENSITY,
77 { DECLARE_NAMED_CHANNEL("intensity", "both") },
83 .type = SENSOR_TYPE_INTERNAL_ILLUMINANCE,
87 { DECLARE_GENERIC_CHANNEL("illuminance") },
93 .type = SENSOR_TYPE_ORIENTATION,
97 { DECLARE_NAMED_CHANNEL("incli", "x") },
98 { DECLARE_NAMED_CHANNEL("incli", "y") },
99 { DECLARE_NAMED_CHANNEL("incli", "z") },
105 .type = SENSOR_TYPE_ROTATION_VECTOR,
109 { DECLARE_NAMED_CHANNEL("rot", "quat_x") },
110 { DECLARE_NAMED_CHANNEL("rot", "quat_y") },
111 { DECLARE_NAMED_CHANNEL("rot", "quat_z") },
112 { DECLARE_NAMED_CHANNEL("rot", "quat_w") },
118 .type = SENSOR_TYPE_AMBIENT_TEMPERATURE,
122 { DECLARE_GENERIC_CHANNEL("temp") },
128 .type = SENSOR_TYPE_PROXIMITY,
132 { DECLARE_GENERIC_CHANNEL("proximity") },
138 .type = SENSOR_TYPE_GYROSCOPE_UNCALIBRATED,
142 { DECLARE_GENERIC_CHANNEL("") },
149 .type = SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED,
153 { DECLARE_GENERIC_CHANNEL("") },
159 .type = SENSOR_TYPE_STEP_COUNTER,
163 { DECLARE_GENERIC_CHANNEL("steps") },
169 .type = SENSOR_TYPE_STEP_DETECTOR,
174 DECLARE_VOID_CHANNEL("steps")
177 { DECLARE_NAMED_EVENT("steps", "change") },
185 .type = SENSOR_TYPE_PROXIMITY,
190 DECLARE_VOID_CHANNEL("proximity0")
193 { DECLARE_EVENT("proximity0", "_", "", "", "thresh", "_", "either") },
197 DECLARE_VOID_CHANNEL("proximity1")
200 { DECLARE_EVENT("proximity1", "_", "", "", "thresh", "_", "either") },
204 DECLARE_VOID_CHANNEL("proximity2")
207 { DECLARE_EVENT("proximity2", "_", "", "", "thresh", "_", "either") },
211 DECLARE_VOID_CHANNEL("proximity3")
214 { DECLARE_EVENT("proximity3", "_", "", "", "thresh", "_", "either") },
221 unsigned int catalog_size = ARRAY_SIZE(sensor_catalog);
223 /* ACPI PLD (physical location of device) definitions, as used with sensors */
225 #define PANEL_FRONT 4
228 /* We equate sensor handles to indices in these tables */
230 struct sensor_t sensor_desc[MAX_SENSORS]; /* Android-level descriptors */
231 sensor_info_t sensor[MAX_SENSORS]; /* Internal descriptors */
232 int sensor_count; /* Detected sensors */
235 /* if the sensor has an _en attribute, we need to enable it */
236 int get_needs_enable(int dev_num, const char *tag)
238 char sysfs_path[PATH_MAX];
241 sprintf(sysfs_path, SENSOR_ENABLE_PATH, dev_num, tag);
243 fd = open(sysfs_path, O_RDWR);
251 static void setup_properties_from_pld (int s, int panel, int rotation,
255 * Generate suitable order and opt_scale directives from the PLD panel
256 * and rotation codes we got. This can later be superseded by the usual
257 * properties if necessary. Eventually we'll need to replace these
258 * mechanisms by a less convoluted one, such as a 3x3 placement matrix.
265 int angle = rotation * 45;
267 /* Only deal with 3 axis chips for now */
268 if (num_channels < 3)
271 if (panel == PANEL_BACK) {
272 /* Chip placed on the back panel ; negate x and z */
278 case 90: /* 90° clockwise: negate y then swap x,y */
283 case 180: /* Upside down: negate x and y */
288 case 270: /* 90° counter clockwise: negate x then swap x,y */
295 sensor[s].order[0] = 1;
296 sensor[s].order[1] = 0;
297 sensor[s].order[2] = 2;
298 sensor[s].quirks |= QUIRK_FIELD_ORDERING;
301 sensor[s].channel[0].opt_scale = x;
302 sensor[s].channel[1].opt_scale = y;
303 sensor[s].channel[2].opt_scale = z;
307 static int is_valid_pld (int panel, int rotation)
309 if (panel != PANEL_FRONT && panel != PANEL_BACK) {
310 ALOGW("Unhandled PLD panel spec: %d\n", panel);
314 /* Only deal with 90° rotations for now */
315 if (rotation < 0 || rotation > 7 || (rotation & 1)) {
316 ALOGW("Unhandled PLD rotation spec: %d\n", rotation);
324 static int read_pld_from_properties (int s, int* panel, int* rotation)
328 if (sensor_get_prop(s, "panel", &p))
331 if (sensor_get_prop(s, "rotation", &r))
334 if (!is_valid_pld(p, r))
340 ALOGI("S%d PLD from properties: panel=%d, rotation=%d\n", s, p, r);
346 static int read_pld_from_sysfs (int s, int dev_num, int* panel, int* rotation)
348 char sysfs_path[PATH_MAX];
351 sprintf(sysfs_path, BASE_PATH "../firmware_node/pld/panel", dev_num);
353 if (sysfs_read_int(sysfs_path, &p))
356 sprintf(sysfs_path, BASE_PATH "../firmware_node/pld/rotation", dev_num);
358 if (sysfs_read_int(sysfs_path, &r))
361 if (!is_valid_pld(p, r))
367 ALOGI("S%d PLD from sysfs: panel=%d, rotation=%d\n", s, p, r);
373 static void decode_placement_information (int dev_num, int num_channels, int s)
376 * See if we have optional "physical location of device" ACPI tags.
377 * We're only interested in panel and rotation specifiers. Use the
378 * .panel and .rotation properties in priority, and the actual ACPI
379 * values as a second source.
385 if (read_pld_from_properties(s, &panel, &rotation) &&
386 read_pld_from_sysfs(s, dev_num, &panel, &rotation))
387 return; /* No PLD data available */
389 /* Map that to field ordering and scaling mechanisms */
390 setup_properties_from_pld(s, panel, rotation, num_channels);
394 static int map_internal_to_external_type (int sensor_type)
396 /* Most sensors are internally identified using the Android type, but for some we use a different type specification internally */
398 switch (sensor_type) {
399 case SENSOR_TYPE_INTERNAL_ILLUMINANCE:
400 case SENSOR_TYPE_INTERNAL_INTENSITY:
401 return SENSOR_TYPE_LIGHT;
408 static void populate_descriptors (int s, int sensor_type)
410 int32_t min_delay_us;
411 max_delay_t max_delay_us;
413 /* Initialize Android-visible descriptor */
414 sensor_desc[s].name = sensor_get_name(s);
415 sensor_desc[s].vendor = sensor_get_vendor(s);
416 sensor_desc[s].version = sensor_get_version(s);
417 sensor_desc[s].handle = s;
418 sensor_desc[s].type = map_internal_to_external_type(sensor_type);
420 sensor_desc[s].maxRange = sensor_get_max_range(s);
421 sensor_desc[s].resolution = sensor_get_resolution(s);
422 sensor_desc[s].power = sensor_get_power(s);
423 sensor_desc[s].stringType = sensor_get_string_type(s);
425 /* None of our supported sensors requires a special permission */
426 sensor_desc[s].requiredPermission = "";
428 sensor_desc[s].flags = sensor_get_flags(s);
429 sensor_desc[s].minDelay = sensor_get_min_delay(s);
430 sensor_desc[s].maxDelay = sensor_get_max_delay(s);
432 ALOGV("Sensor %d (%s) type(%d) minD(%d) maxD(%d) flags(%2.2x)\n",
433 s, sensor[s].friendly_name, sensor_desc[s].type,
434 sensor_desc[s].minDelay, sensor_desc[s].maxDelay,
435 sensor_desc[s].flags);
437 /* We currently do not implement batching */
438 sensor_desc[s].fifoReservedEventCount = 0;
439 sensor_desc[s].fifoMaxEventCount = 0;
441 min_delay_us = sensor_desc[s].minDelay;
442 max_delay_us = sensor_desc[s].maxDelay;
444 sensor[s].min_supported_rate = max_delay_us ? 1000000.0 / max_delay_us : 1;
445 sensor[s].max_supported_rate = min_delay_us && min_delay_us != -1 ? 1000000.0 / min_delay_us : 0;
449 static void add_virtual_sensor (int catalog_index)
454 if (sensor_count == MAX_SENSORS) {
455 ALOGE("Too many sensors!\n");
459 sensor_type = sensor_catalog[catalog_index].type;
463 sensor[s].is_virtual = 1;
464 sensor[s].catalog_index = catalog_index;
465 sensor[s].type = sensor_type;
467 populate_descriptors(s, sensor_type);
469 /* Initialize fields related to sysfs reads offloading */
470 sensor[s].thread_data_fd[0] = -1;
471 sensor[s].thread_data_fd[1] = -1;
472 sensor[s].acquisition_thread = -1;
478 static int add_sensor (int dev_num, int catalog_index, int mode)
483 char sysfs_path[PATH_MAX];
490 char suffix[MAX_NAME_SIZE + 8];
493 if (sensor_count == MAX_SENSORS) {
494 ALOGE("Too many sensors!\n");
498 sensor_type = sensor_catalog[catalog_index].type;
501 * At this point we could check that the expected sysfs attributes are
502 * present ; that would enable having multiple catalog entries with the
503 * same sensor type, accomodating different sets of sysfs attributes.
508 sensor[s].dev_num = dev_num;
509 sensor[s].catalog_index = catalog_index;
510 sensor[s].type = sensor_type;
511 sensor[s].mode = mode;
512 sensor[s].trigger_nr = -1; /* -1 means no trigger - we'll populate these at a later time */
514 num_channels = sensor_catalog[catalog_index].num_channels;
516 if (mode == MODE_POLL)
517 sensor[s].num_channels = 0;
519 sensor[s].num_channels = num_channels;
521 /* Populate the quirks array */
522 sensor_get_quirks(s);
524 /* Reject interfaces that may have been disabled through a quirk for this driver */
525 if ((mode == MODE_EVENT && (sensor[s].quirks & QUIRK_NO_EVENT_MODE)) ||
526 (mode == MODE_TRIGGER && (sensor[s].quirks & QUIRK_NO_TRIG_MODE )) ||
527 (mode == MODE_POLL && (sensor[s].quirks & QUIRK_NO_POLL_MODE ))) {
528 memset(&sensor[s], 0, sizeof(sensor[0]));
532 prefix = sensor_catalog[catalog_index].tag;
535 * receiving the illumination sensor calibration inputs from
536 * the Android properties and setting it within sysfs
538 if (sensor_type == SENSOR_TYPE_INTERNAL_ILLUMINANCE) {
539 retval = sensor_get_illumincalib(s);
541 sprintf(sysfs_path, ILLUMINATION_CALIBPATH, dev_num);
542 sysfs_write_int(sysfs_path, retval);
547 * See if we have optional calibration biases for each of the channels of this sensor. These would be expressed using properties like
548 * 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
549 * relevant calibbias sysfs file if that file can be located and then used internally by the iio sensor driver.
553 for (c = 0; c < num_channels; c++) {
554 ch_name = sensor_catalog[catalog_index].channel[c].name;
555 sprintf(suffix, "%s.calib_bias", ch_name);
556 if (!sensor_get_prop(s, suffix, &calib_bias) && calib_bias) {
557 sprintf(suffix, "%s_%s", prefix, sensor_catalog[catalog_index].channel[c].name);
558 sprintf(sysfs_path, SENSOR_CALIB_BIAS_PATH, dev_num, suffix);
559 sysfs_write_int(sysfs_path, calib_bias);
563 if (!sensor_get_prop(s, "calib_bias", &calib_bias) && calib_bias) {
564 sprintf(sysfs_path, SENSOR_CALIB_BIAS_PATH, dev_num, prefix);
565 sysfs_write_int(sysfs_path, calib_bias);
568 /* Read name attribute, if available */
569 sprintf(sysfs_path, NAME_PATH, dev_num);
570 sysfs_read_str(sysfs_path, sensor[s].internal_name, MAX_NAME_SIZE);
572 /* See if we have general offsets and scale values for this sensor */
574 sprintf(sysfs_path, SENSOR_OFFSET_PATH, dev_num, prefix);
575 sysfs_read_float(sysfs_path, &sensor[s].offset);
577 sprintf(sysfs_path, SENSOR_SCALE_PATH, dev_num, prefix);
578 if (!sensor_get_fl_prop(s, "scale", &scale)) {
580 * There is a chip preferred scale specified,
581 * so try to store it in sensor's scale file
583 if (sysfs_write_float(sysfs_path, scale) == -1 && errno == ENOENT) {
584 ALOGE("Failed to store scale[%g] into %s - file is missing", scale, sysfs_path);
585 /* Store failed, try to store the scale into channel specific file */
586 for (c = 0; c < num_channels; c++)
588 sprintf(sysfs_path, BASE_PATH "%s", dev_num,
589 sensor_catalog[catalog_index].channel[c].scale_path);
590 if (sysfs_write_float(sysfs_path, scale) == -1)
591 ALOGE("Failed to store scale[%g] into %s", scale, sysfs_path);
596 sprintf(sysfs_path, SENSOR_SCALE_PATH, dev_num, prefix);
597 if (!sysfs_read_float(sysfs_path, &scale)) {
598 sensor[s].scale = scale;
599 ALOGV("Scale path:%s scale:%g dev_num:%d\n",
600 sysfs_path, scale, dev_num);
604 /* Read channel specific scale if any*/
605 for (c = 0; c < num_channels; c++)
607 sprintf(sysfs_path, BASE_PATH "%s", dev_num,
608 sensor_catalog[catalog_index].channel[c].scale_path);
610 if (!sysfs_read_float(sysfs_path, &scale)) {
611 sensor[s].channel[c].scale = scale;
614 ALOGV( "Scale path:%s "
615 "channel scale:%g dev_num:%d\n",
616 sysfs_path, scale, dev_num);
621 /* Set default scaling - if num_channels is zero, we have one channel */
623 sensor[s].channel[0].opt_scale = 1;
625 for (c = 1; c < num_channels; c++)
626 sensor[s].channel[c].opt_scale = 1;
628 for (c = 0; c < num_channels; c++) {
629 /* Check the presence of the channel's input_path */
630 sprintf(sysfs_path, BASE_PATH "%s", dev_num,
631 sensor_catalog[catalog_index].channel[c].input_path);
632 sensor[s].channel[c].input_path_present = (access(sysfs_path, R_OK) != -1);
633 /* Check the presence of the channel's raw_path */
634 sprintf(sysfs_path, BASE_PATH "%s", dev_num,
635 sensor_catalog[catalog_index].channel[c].raw_path);
636 sensor[s].channel[c].raw_path_present = (access(sysfs_path, R_OK) != -1);
639 if (sensor_get_mounting_matrix(s, sensor[s].mounting_matrix))
640 sensor[s].quirks |= QUIRK_MOUNTING_MATRIX;
642 /* Read ACPI _PLD attributes for this sensor, if there are any */
643 decode_placement_information(dev_num, num_channels, s);
646 * See if we have optional correction scaling factors for each of the
647 * channels of this sensor. These would be expressed using properties
648 * like iio.accel.y.opt_scale = -1. In case of a single channel we also
649 * support things such as iio.temp.opt_scale = -1. Note that this works
650 * for all types of sensors, and whatever transform is selected, on top
651 * of any previous conversions.
655 for (c = 0; c < num_channels; c++) {
656 ch_name = sensor_catalog[catalog_index].channel[c].name;
657 sprintf(suffix, "%s.opt_scale", ch_name);
658 if (!sensor_get_fl_prop(s, suffix, &opt_scale))
659 sensor[s].channel[c].opt_scale = opt_scale;
662 if (!sensor_get_fl_prop(s, "opt_scale", &opt_scale))
663 sensor[s].channel[0].opt_scale = opt_scale;
666 populate_descriptors(s, sensor_type);
668 if (sensor[s].internal_name[0] == '\0') {
670 * In case the kernel-mode driver doesn't expose a name for
671 * the iio device, use (null)-dev%d as the trigger name...
672 * This can be considered a kernel-mode iio driver bug.
674 ALOGW("Using null trigger on sensor %d (dev %d)\n", s, dev_num);
675 strcpy(sensor[s].internal_name, "(null)");
678 switch (sensor_type) {
679 case SENSOR_TYPE_ACCELEROMETER:
680 /* Only engage accelerometer bias compensation if really needed */
681 if (sensor_get_quirks(s) & QUIRK_BIASED)
682 sensor[s].cal_data = calloc(1, sizeof(accel_cal_t));
685 case SENSOR_TYPE_GYROSCOPE:
686 sensor[s].cal_data = malloc(sizeof(gyro_cal_t));
689 case SENSOR_TYPE_MAGNETIC_FIELD:
690 sensor[s].cal_data = malloc(sizeof(compass_cal_t));
694 sensor[s].max_cal_level = sensor_get_cal_steps(s);
696 /* Select one of the available sensor sample processing styles */
699 /* Initialize fields related to sysfs reads offloading */
700 sensor[s].thread_data_fd[0] = -1;
701 sensor[s].thread_data_fd[1] = -1;
702 sensor[s].acquisition_thread = -1;
704 /* Check if we have a special ordering property on this sensor */
705 if (sensor_get_order(s, sensor[s].order))
706 sensor[s].quirks |= QUIRK_FIELD_ORDERING;
708 sensor[s].needs_enable = get_needs_enable(dev_num, sensor_catalog[catalog_index].tag);
714 static void virtual_sensors_check (void)
722 int gyro_cal_idx = 0;
723 int magn_cal_idx = 0;
726 for (i=0; i<sensor_count; i++)
727 switch (sensor[i].type) {
728 case SENSOR_TYPE_ACCELEROMETER:
731 case SENSOR_TYPE_GYROSCOPE:
735 case SENSOR_TYPE_MAGNETIC_FIELD:
739 case SENSOR_TYPE_ORIENTATION:
742 case SENSOR_TYPE_ROTATION_VECTOR:
747 for (j=0; j<catalog_size; j++)
748 switch (sensor_catalog[j].type) {
750 * If we have accel + gyro + magn but no rotation vector sensor,
751 * SensorService replaces the HAL provided orientation sensor by the
752 * AOSP version... provided we report one. So initialize a virtual
753 * orientation sensor with zero values, which will get replaced. See:
754 * frameworks/native/services/sensorservice/SensorService.cpp, looking
755 * for SENSOR_TYPE_ROTATION_VECTOR; that code should presumably fall
756 * back to mUserSensorList.add instead of replaceAt, but accommodate it.
759 case SENSOR_TYPE_ORIENTATION:
760 if (has_acc && has_gyr && has_mag && !has_rot && !has_ori)
761 add_sensor(0, j, MODE_POLL);
763 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED:
765 sensor[sensor_count].base_count = 1;
766 sensor[sensor_count].base[0] = gyro_cal_idx;
767 add_virtual_sensor(j);
770 case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED:
772 sensor[sensor_count].base_count = 1;
773 sensor[sensor_count].base[0] = magn_cal_idx;
774 add_virtual_sensor(j);
783 static void propose_new_trigger (int s, char trigger_name[MAX_NAME_SIZE],
787 * A new trigger has been enumerated for this sensor. Check if it makes sense to use it over the currently selected one,
788 * and select it if it is so. The format is something like sensor_name-dev0.
791 const char *suffix = trigger_name + sensor_name_len + 1;
793 /* dev is the default, and lowest priority; no need to update */
794 if (!memcmp(suffix, "dev", 3))
797 /* If we found any-motion trigger, record it */
799 if (!memcmp(suffix, "any-motion-", 11)) {
800 strcpy(sensor[s].motion_trigger_name, trigger_name);
804 /* If we found a hrtimer trigger, record it */
805 if (!memcmp(suffix, "hr-dev", 6)) {
806 strcpy(sensor[s].hrtimer_trigger_name, trigger_name);
810 * 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
811 * of the trigger to use with this sensor.
813 strcpy(sensor[s].init_trigger_name, trigger_name);
817 static void update_sensor_matching_trigger_name (char name[MAX_NAME_SIZE], int* updated, int trigger)
820 * Check if we have a sensor matching the specified trigger name, which should then begin with the sensor name, and end with a number
821 * 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
822 * when enabling this sensor.
832 * First determine the iio device number this trigger refers to. We expect the last few characters (typically one) of the trigger name
833 * to be this number, so perform a few checks.
835 len = strnlen(name, MAX_NAME_SIZE);
840 cursor = name + len - 1;
842 if (!isdigit(*cursor))
845 while (len && isdigit(*cursor)) {
850 dev_num = atoi(cursor+1);
852 /* See if that matches a sensor */
853 for (s=0; s<sensor_count; s++)
854 if (sensor[s].dev_num == dev_num) {
856 sensor_name_len = strlen(sensor[s].internal_name);
858 if (!strncmp(name, sensor[s].internal_name, sensor_name_len))
859 /* Switch to new trigger if appropriate */
860 propose_new_trigger(s, name, sensor_name_len);
862 sensor[s].trigger_nr = trigger;
866 static int create_hrtimer_trigger(int s, int trigger)
868 struct stat dir_status;
869 char buf[MAX_NAME_SIZE];
870 char hrtimer_path[PATH_MAX];
871 char hrtimer_name[MAX_NAME_SIZE];
873 snprintf(buf, MAX_NAME_SIZE, "hrtimer-%s-hr-dev%d", sensor[s].internal_name, sensor[s].dev_num);
874 snprintf(hrtimer_name, MAX_NAME_SIZE, "%s-hr-dev%d", sensor[s].internal_name, sensor[s].dev_num);
875 snprintf(hrtimer_path, PATH_MAX, "%s%s", CONFIGFS_TRIGGER_PATH, buf);
877 /* Get parent dir status */
878 if (stat(CONFIGFS_TRIGGER_PATH, &dir_status))
881 /* Create hrtimer with the same access rights as it's parent */
882 if (mkdir(hrtimer_path, dir_status.st_mode))
886 strncpy (sensor[s].hrtimer_trigger_name, hrtimer_name, MAX_NAME_SIZE);
887 sensor[s].trigger_nr = trigger;
891 static void setup_trigger_names (void)
893 char filename[PATH_MAX];
894 char buf[MAX_NAME_SIZE];
898 int updated[MAX_SENSORS] = {0};
900 /* By default, use the name-dev convention that most drivers use */
901 for (s=0; s<sensor_count; s++)
902 snprintf(sensor[s].init_trigger_name, MAX_NAME_SIZE, "%s-dev%d", sensor[s].internal_name, sensor[s].dev_num);
904 /* Now have a look to /sys/bus/iio/devices/triggerX entries */
906 for (trigger=0; trigger<MAX_TRIGGERS; trigger++) {
908 snprintf(filename, sizeof(filename), TRIGGER_FILE_PATH,trigger);
910 ret = sysfs_read_str(filename, buf, sizeof(buf));
915 /* Record initial and any-motion triggers names */
916 update_sensor_matching_trigger_name(buf, updated, trigger);
920 /* If we don't have any other trigger exposed and quirk hrtimer is set setup the hrtimer name here - and create it also */
921 for (s=0; s<sensor_count; s++) {
922 if ((sensor[s].quirks & QUIRK_HRTIMER) && !updated[s])
923 create_hrtimer_trigger(s, trigger);
927 * Certain drivers expose only motion triggers even though they should be continous. For these, use the default trigger name as the motion
928 * trigger. The code generating intermediate events is dependent on motion_trigger_name being set to a non empty string.
931 for (s=0; s<sensor_count; s++)
932 if ((sensor[s].quirks & QUIRK_TERSE_DRIVER) && sensor[s].motion_trigger_name[0] == '\0')
933 strcpy(sensor[s].motion_trigger_name, sensor[s].init_trigger_name);
935 for (s=0; s<sensor_count; s++)
936 if (sensor[s].mode == MODE_TRIGGER) {
937 ALOGI("Sensor %d (%s) default trigger: %s\n", s, sensor[s].friendly_name, sensor[s].init_trigger_name);
938 if (sensor[s].motion_trigger_name[0])
939 ALOGI("Sensor %d (%s) motion trigger: %s\n", s, sensor[s].friendly_name, sensor[s].motion_trigger_name);
940 if (sensor[s].hrtimer_trigger_name[0])
941 ALOGI("Sensor %d (%s) hrtimer trigger: %s\n", s, sensor[s].friendly_name, sensor[s].hrtimer_trigger_name);
946 static int catalog_index_from_sensor_type (int type)
948 /* Return first matching catalog entry index for selected type */
951 for (i=0; i<catalog_size; i++)
952 if (sensor_catalog[i].type == type)
959 static void post_process_sensor_list (char poll_map[catalog_size], char trig_map[catalog_size], char event_map[catalog_size])
961 int illuminance_cat_index = catalog_index_from_sensor_type(SENSOR_TYPE_INTERNAL_ILLUMINANCE);
962 int intensity_cat_index = catalog_index_from_sensor_type(SENSOR_TYPE_INTERNAL_INTENSITY);
963 int illuminance_found = poll_map[illuminance_cat_index] || trig_map[illuminance_cat_index] || event_map[illuminance_cat_index];
965 /* If an illumimance sensor has been reported */
966 if (illuminance_found) {
967 /* Hide any intensity sensors we can have for the same iio device */
968 poll_map [intensity_cat_index ] = 0;
969 trig_map [intensity_cat_index ] = 0;
970 event_map[intensity_cat_index ] = 0;
976 void enumerate_sensors (void)
979 * Discover supported sensors and allocate control structures for them. Multiple sensors can potentially rely on a single iio device (each
980 * 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
981 * and trigger-based sensor, use the trigger usage mode.
983 char poll_sensors[catalog_size];
984 char trig_sensors[catalog_size];
985 char event_sensors[catalog_size];
990 for (dev_num=0; dev_num<MAX_DEVICES; dev_num++) {
993 discover_sensors(dev_num, BASE_PATH, poll_sensors, check_poll_sensors);
994 discover_sensors(dev_num, CHANNEL_PATH, trig_sensors, check_trig_sensors);
995 discover_sensors(dev_num, EVENTS_PATH, event_sensors, check_event_sensors);
997 /* Hide specific sensor types if appropriate */
998 post_process_sensor_list(poll_sensors, trig_sensors, event_sensors);
1000 for (i=0; i<catalog_size; i++) {
1001 /* Try using events interface */
1002 if (event_sensors[i] && !add_sensor(dev_num, i, MODE_EVENT))
1006 if (trig_sensors[i] && !add_sensor(dev_num, i, MODE_TRIGGER)) {
1011 /* Try polling otherwise */
1012 if (poll_sensors[i])
1013 add_sensor(dev_num, i, MODE_POLL);
1017 build_sensor_report_maps(dev_num);
1020 ALOGI("Discovered %d sensors\n", sensor_count);
1022 /* Set up default - as well as custom - trigger names */
1023 setup_trigger_names();
1025 virtual_sensors_check();
1029 void delete_enumeration_data (void)
1032 for (i = 0; i < sensor_count; i++)
1033 if (sensor[i].cal_data) {
1034 free(sensor[i].cal_data);
1035 sensor[i].cal_data = NULL;
1036 sensor[i].cal_level = 0;
1039 /* Reset sensor count */
1044 int get_sensors_list (__attribute__((unused)) struct sensors_module_t* module,
1045 struct sensor_t const** list)
1047 *list = sensor_desc;
1048 return sensor_count;