/*
- * Copyright (C) 2014-2015 Intel Corporation.
- */
+// Copyright (c) 2015 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
#include <ctype.h>
#include <dirent.h>
#include <stdlib.h>
#include <fcntl.h>
#include <utils/Log.h>
+#include <sys/stat.h>
#include <hardware/sensors.h>
#include "enumeration.h"
#include "description.h"
#include "control.h"
#include "calibration.h"
+#include <errno.h>
+
/*
* This table maps syfs entries in scan_elements directories to sensor types,
* and will also be used to determine other sysfs names as well as the iio
sensor_catalog_entry_t sensor_catalog[] = {
{
.tag = "accel",
+ .shorthand = "",
.type = SENSOR_TYPE_ACCELEROMETER,
.num_channels = 3,
.is_virtual = 0,
},
{
.tag = "anglvel",
+ .shorthand = "",
.type = SENSOR_TYPE_GYROSCOPE,
.num_channels = 3,
.is_virtual = 0,
},
{
.tag = "magn",
+ .shorthand = "",
.type = SENSOR_TYPE_MAGNETIC_FIELD,
.num_channels = 3,
.is_virtual = 0,
},
{
.tag = "intensity",
+ .shorthand = "",
.type = SENSOR_TYPE_INTERNAL_INTENSITY,
.num_channels = 1,
.is_virtual = 0,
},
{
.tag = "illuminance",
+ .shorthand = "",
.type = SENSOR_TYPE_INTERNAL_ILLUMINANCE,
.num_channels = 1,
.is_virtual = 0,
},
{
.tag = "incli",
+ .shorthand = "",
.type = SENSOR_TYPE_ORIENTATION,
.num_channels = 3,
.is_virtual = 0,
},
{
.tag = "rot",
+ .shorthand = "",
.type = SENSOR_TYPE_ROTATION_VECTOR,
.num_channels = 4,
.is_virtual = 0,
},
{
.tag = "temp",
+ .shorthand = "",
.type = SENSOR_TYPE_AMBIENT_TEMPERATURE,
.num_channels = 1,
.is_virtual = 0,
},
{
.tag = "proximity",
+ .shorthand = "prox",
.type = SENSOR_TYPE_PROXIMITY,
.num_channels = 1,
.is_virtual = 0,
},
{
.tag = "",
+ .shorthand = "",
.type = SENSOR_TYPE_GYROSCOPE_UNCALIBRATED,
.num_channels = 0,
.is_virtual = 1,
},
{
.tag = "",
+ .shorthand = "",
.type = SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED,
.num_channels = 0,
.is_virtual = 1,
},
{
.tag = "steps",
+ .shorthand = "",
.type = SENSOR_TYPE_STEP_COUNTER,
.num_channels = 1,
.is_virtual = 0,
},
{
.tag = "steps",
+ .shorthand = "",
.type = SENSOR_TYPE_STEP_DETECTOR,
.num_channels = 1,
.is_virtual = 0,
},
{
.tag = "proximity",
+ .shorthand = "prox",
.type = SENSOR_TYPE_PROXIMITY,
.num_channels = 4,
.is_virtual = 0,
#define PANEL_FRONT 4
#define PANEL_BACK 5
+/* Buffer default length */
+#define BUFFER_LENGTH 16
+
/* We equate sensor handles to indices in these tables */
struct sensor_t sensor_desc[MAX_SENSORS]; /* Android-level descriptors */
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",
+ ALOGV("Sensor %d (%s) type(%d) minD(%d) maxD(%zd) flags(%2.2zx)\n",
s, sensor[s].friendly_name, sensor_desc[s].type,
sensor_desc[s].minDelay, sensor_desc[s].maxDelay,
sensor_desc[s].flags);
int num_channels;
char suffix[MAX_NAME_SIZE + 8];
int calib_bias;
+ int buffer_length;
if (sensor_count == MAX_SENSORS) {
ALOGE("Too many sensors!\n");
sensor[s].catalog_index = catalog_index;
sensor[s].type = sensor_type;
sensor[s].mode = mode;
+ sensor[s].trigger_nr = -1; /* -1 means no trigger - we'll populate these at a later time */
num_channels = sensor_catalog[catalog_index].num_channels;
sysfs_write_int(sysfs_path, calib_bias);
}
+ /* Change buffer length according to the property or use default value */
+ if (mode == MODE_TRIGGER) {
+ if (sensor_get_prop(s, "buffer_length", &buffer_length)) {
+ buffer_length = BUFFER_LENGTH;
+ }
+
+ sprintf(sysfs_path, BUFFER_LENGTH_PATH, dev_num);
+
+ if (sysfs_write_int(sysfs_path, buffer_length) <= 0) {
+ ALOGE("Failed to set buffer length on dev%d", dev_num);
+ }
+ }
+
/* Read name attribute, if available */
sprintf(sysfs_path, NAME_PATH, dev_num);
sysfs_read_str(sysfs_path, sensor[s].internal_name, MAX_NAME_SIZE);
/* Set default scaling - if num_channels is zero, we have one channel */
- sensor[s].channel[0].opt_scale = 1;
+ sensor[s].channel[0].opt_scale = (sensor_type == SENSOR_TYPE_ACCELEROMETER) ? -1 : 1;
for (c = 1; c < num_channels; c++)
- sensor[s].channel[c].opt_scale = 1;
+ sensor[s].channel[c].opt_scale = sensor[s].channel[0].opt_scale;
for (c = 0; c < num_channels; c++) {
/* Check the presence of the channel's input_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);
+ sensor_get_available_frequencies(s);
+
+ if (sensor_get_mounting_matrix(s, sensor[s].mounting_matrix))
+ sensor[s].quirks |= QUIRK_MOUNTING_MATRIX;
+ else
+ /* 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
ch_name = sensor_catalog[catalog_index].channel[c].name;
sprintf(suffix, "%s.opt_scale", ch_name);
if (!sensor_get_fl_prop(s, suffix, &opt_scale))
- sensor[s].channel[c].opt_scale = opt_scale;
+ sensor[s].channel[c].opt_scale *= opt_scale;
}
} else {
if (!sensor_get_fl_prop(s, "opt_scale", &opt_scale))
return;
}
+ /* If we found a hrtimer trigger, record it */
+ if (!memcmp(suffix, "hr-dev", 6)) {
+ strcpy(sensor[s].hrtimer_trigger_name, trigger_name);
+ return;
+ }
/*
* 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.
}
-static void update_sensor_matching_trigger_name (char name[MAX_NAME_SIZE])
+static void update_sensor_matching_trigger_name (char name[MAX_NAME_SIZE], int* updated, int 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
if (!strncmp(name, sensor[s].internal_name, sensor_name_len))
/* Switch to new trigger if appropriate */
propose_new_trigger(s, name, sensor_name_len);
+ updated[s] = 1;
+ sensor[s].trigger_nr = trigger;
}
}
+extern float sensor_get_max_static_freq(int s);
+extern float sensor_get_min_freq (int s);
+
+static int create_hrtimer_trigger(int s, int trigger)
+{
+ struct stat dir_status;
+ char buf[MAX_NAME_SIZE];
+ char hrtimer_path[PATH_MAX];
+ char hrtimer_name[MAX_NAME_SIZE];
+ float min_supported_rate = 1, min_rate_cap, max_supported_rate;
+
+ snprintf(buf, MAX_NAME_SIZE, "hrtimer-%s-hr-dev%d", sensor[s].internal_name, sensor[s].dev_num);
+ snprintf(hrtimer_name, MAX_NAME_SIZE, "%s-hr-dev%d", sensor[s].internal_name, sensor[s].dev_num);
+ snprintf(hrtimer_path, PATH_MAX, "%s%s", CONFIGFS_TRIGGER_PATH, buf);
+
+ /* Get parent dir status */
+ if (stat(CONFIGFS_TRIGGER_PATH, &dir_status))
+ return -1;
+
+ /* Create hrtimer with the same access rights as it's parent */
+ if (mkdir(hrtimer_path, dir_status.st_mode))
+ if (errno != EEXIST)
+ return -1;
+
+ strncpy (sensor[s].hrtimer_trigger_name, hrtimer_name, MAX_NAME_SIZE);
+ sensor[s].trigger_nr = trigger;
+
+ max_supported_rate = sensor_get_max_static_freq(s);
+
+ /* set 0 for wrong values */
+ if (max_supported_rate < 0.1) {
+ max_supported_rate = 0;
+ }
+
+ sensor[s].max_supported_rate = max_supported_rate;
+ sensor_desc[s].minDelay = max_supported_rate ? (int32_t) (1000000.0 / max_supported_rate) : 0;
+
+ /* Check if a minimum rate was specified for this sensor */
+ min_rate_cap = sensor_get_min_freq(s);
+
+ if (min_supported_rate < min_rate_cap) {
+ min_supported_rate = min_rate_cap;
+ }
+
+ sensor[s].min_supported_rate = min_supported_rate;
+ sensor_desc[s].maxDelay = (max_delay_t) (1000000.0 / min_supported_rate);
+
+ return 0;
+}
static void setup_trigger_names (void)
{
int s;
int trigger;
int ret;
+ int updated[MAX_SENSORS] = {0};
/* By default, use the name-dev convention that most drivers use */
for (s=0; s<sensor_count; s++)
for (trigger=0; trigger<MAX_TRIGGERS; trigger++) {
- snprintf(filename, sizeof(filename), TRIGGER_FILE_PATH,trigger);
+ snprintf(filename, sizeof(filename), TRIGGER_FILE_PATH, trigger);
ret = sysfs_read_str(filename, buf, sizeof(buf));
break;
/* Record initial and any-motion triggers names */
- update_sensor_matching_trigger_name(buf);
+ update_sensor_matching_trigger_name(buf, updated, trigger);
+ }
+
+
+ /* If we don't have any other trigger exposed and quirk hrtimer is set setup the hrtimer name here - and create it also */
+ for (s=0; s<sensor_count && trigger<MAX_TRIGGERS; s++) {
+ if ((sensor[s].quirks & QUIRK_HRTIMER) && !updated[s]) {
+ create_hrtimer_trigger(s, trigger);
+ 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);
+ if (sensor[s].hrtimer_trigger_name[0])
+ ALOGI("Sensor %d (%s) hrtimer trigger: %s\n", s, sensor[s].friendly_name, sensor[s].hrtimer_trigger_name);
}
}
+
+static int catalog_index_from_sensor_type (int type)
+{
+ /* Return first matching catalog entry index for selected type */
+ unsigned int i;
+
+ for (i=0; i<catalog_size; i++)
+ if (sensor_catalog[i].type == type)
+ return i;
+
+ return -1;
+}
+
+
+static void post_process_sensor_list (char poll_map[catalog_size], char trig_map[catalog_size], char event_map[catalog_size])
+{
+ int illuminance_cat_index = catalog_index_from_sensor_type(SENSOR_TYPE_INTERNAL_ILLUMINANCE);
+ int intensity_cat_index = catalog_index_from_sensor_type(SENSOR_TYPE_INTERNAL_INTENSITY);
+ int illuminance_found = poll_map[illuminance_cat_index] || trig_map[illuminance_cat_index] || event_map[illuminance_cat_index];
+
+ /* If an illumimance sensor has been reported */
+ if (illuminance_found) {
+ /* Hide any intensity sensors we can have for the same iio device */
+ poll_map [intensity_cat_index ] = 0;
+ trig_map [intensity_cat_index ] = 0;
+ event_map[intensity_cat_index ] = 0;
+ return;
+ }
+}
+
+
+static void swap_sensors (int s1, int s2)
+{
+ struct sensor_t temp_sensor_desc;
+ sensor_info_t temp_sensor;
+
+ /* S1 -> temp */
+ memcpy(&temp_sensor, &sensor[s1], sizeof(sensor_info_t));
+ memcpy(&temp_sensor_desc, &sensor_desc[s1], sizeof(struct sensor_t));
+
+ /* S2 -> S1 */
+ memcpy(&sensor[s1], &sensor[s2], sizeof(sensor_info_t));
+ memcpy(&sensor_desc[s1], &sensor_desc[s2], sizeof(struct sensor_t));
+
+ /* temp -> S2 */
+ memcpy(&sensor[s2], &temp_sensor, sizeof(sensor_info_t));
+ memcpy(&sensor_desc[s2], &temp_sensor_desc, sizeof(struct sensor_t));
+
+ /* Fix-up sensor id mapping, which is stale */
+ sensor_desc[s1].handle = s1;
+ sensor_desc[s2].handle = s2;
+
+ /* Fix up name and vendor buffer pointers, which are potentially stale pointers */
+ sensor_desc[s1].name = sensor_get_name(s1);
+ sensor_desc[s1].vendor = sensor_get_vendor(s1);
+ sensor_desc[s2].name = sensor_get_name(s2);
+ sensor_desc[s2].vendor = sensor_get_vendor(s2);
+}
+
+
+static void reorder_sensors (void)
+{
+ /* Some sensors may be marked as secondary - these need to be listed after other sensors of the same type */
+ int s1, s2;
+
+ for (s1=0; s1<sensor_count-1; s1++)
+ if (sensor[s1].quirks & QUIRK_SECONDARY) {
+ /* Search for subsequent sensors of same type */
+ for (s2 = s1+1; s2<sensor_count; s2++)
+ if (sensor[s2].type == sensor[s1].type && !(sensor[s2].quirks & QUIRK_SECONDARY)) {
+ ALOGI("Sensor S%d has higher priority than S%d, swapping\n", s2, s1);
+ swap_sensors(s1, s2);
+ break;
+ }
+ }
+}
+
+
void enumerate_sensors (void)
{
/*
int dev_num;
unsigned int i;
int trig_found;
+ int s;
for (dev_num=0; dev_num<MAX_DEVICES; dev_num++) {
trig_found = 0;
discover_sensors(dev_num, CHANNEL_PATH, trig_sensors, check_trig_sensors);
discover_sensors(dev_num, EVENTS_PATH, event_sensors, check_event_sensors);
+ /* Hide specific sensor types if appropriate */
+ post_process_sensor_list(poll_sensors, trig_sensors, event_sensors);
+
for (i=0; i<catalog_size; i++) {
/* Try using events interface */
if (event_sensors[i] && !add_sensor(dev_num, i, MODE_EVENT))
build_sensor_report_maps(dev_num);
}
+ /* Make sure secondary sensors appear after primary ones */
+ reorder_sensors();
+
ALOGI("Discovered %d sensors\n", sensor_count);
/* Set up default - as well as custom - trigger names */
setup_trigger_names();
+ ALOGI("Discovered %d sensors\n", sensor_count);
+
virtual_sensors_check();
+
+ for (s=0; s<sensor_count; s++) {
+ ALOGI("S%d: %s\n", s, sensor[s].friendly_name);
+ }
}
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