* 'panel' and 'rotation' specifiers can be used to express ACPI PLD placement
* information ; if found they will be used in priority over the actual ACPI
* data. That is intended as a way to verify values during development.
+ *
+ * It's possible to use the contents of the iio device name as a way to
+ * discriminate between sensors. Several sensors of the same type can coexist:
+ * e.g. ro.iio.temp.bmg160.name = BMG160 Thermometer will be used in priority
+ * over ro.iio.temp.name = BMC150 Thermometer if the sensor for which we query
+ * properties values happen to have its iio device name set to bmg160.
*/
static int sensor_get_st_prop (int s, const char* sel, char val[MAX_NAME_SIZE])
{
char prop_name[PROP_NAME_MAX];
char prop_val[PROP_VALUE_MAX];
+ char extended_sel[PROP_VALUE_MAX];
+
int i = sensor_info[s].catalog_index;
const char *prefix = sensor_catalog[i].tag;
+ /* First try most specialized form, like ro.iio.anglvel.bmg160.name */
+
+ snprintf(extended_sel, PROP_NAME_MAX, "%s.%s",
+ sensor_info[s].internal_name, sel);
+
+ snprintf(prop_name, PROP_NAME_MAX, PROP_BASE, prefix, extended_sel);
+
+ if (property_get(prop_name, prop_val, "")) {
+ strncpy(val, prop_val, MAX_NAME_SIZE-1);
+ val[MAX_NAME_SIZE-1] = '\0';
+ return 0;
+ }
+
+ /* Fall back to simple form, like ro.iio.anglvel.name */
+
sprintf(prop_name, PROP_BASE, prefix, sel);
if (property_get(prop_name, prop_val, "")) {
if (strstr(quirks_buf, "init-rate"))
sensor_info[s].quirks |= QUIRK_INITIAL_RATE;
- if (strstr(quirks_buf, "terse"))
+ if (strstr(quirks_buf, "continuous")) {
+ sensor_info[s].quirks |= QUIRK_CONTINUOUS_DRIVER;
+ }
+
+ if (strstr(quirks_buf, "terse") && !(sensor_info[s].quirks & QUIRK_CONTINUOUS_DRIVER))
sensor_info[s].quirks |= QUIRK_TERSE_DRIVER;
if (strstr(quirks_buf, "noisy"))
return flags;
}
+int get_cdd_freq(int s, int must)
+{
+ int catalog_index = sensor_info[s].catalog_index;
+ int sensor_type = sensor_catalog[catalog_index].type;
+
+ switch (sensor_type) {
+ case SENSOR_TYPE_ACCELEROMETER:
+ return (must ? 100 : 200); /* must 100 Hz, should 200 Hz, CDD compliant */
+ case SENSOR_TYPE_GYROSCOPE:
+ case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED:
+ return (must ? 200 : 200); /* must 200 Hz, should 200 Hz, CDD compliant */
+ case SENSOR_TYPE_MAGNETIC_FIELD:
+ return (must ? 10 : 50); /* must 10 Hz, should 50 Hz, CDD compliant */
+ case SENSOR_TYPE_LIGHT:
+ case SENSOR_TYPE_AMBIENT_TEMPERATURE:
+ case SENSOR_TYPE_TEMPERATURE:
+ return (must ? 1 : 2); /* must 1 Hz, should 2Hz, not mentioned in CDD */
+ default:
+ return 0;
+ }
+}
+
+/* This value is defined only for continuous mode and on-change sensors. It is the delay between
+ * two sensor events corresponding to the lowest frequency that this sensor supports. When lower
+ * frequencies are requested through batch()/setDelay() the events will be generated at this
+ * frequency instead. It can be used by the framework or applications to estimate when the batch
+ * FIFO may be full.
+ *
+ * NOTE: 1) period_ns is in nanoseconds where as maxDelay/minDelay are in microseconds.
+ * continuous, on-change: maximum sampling period allowed in microseconds.
+ * one-shot, special : 0
+ * 2) maxDelay should always fit within a 32 bit signed integer. It is declared as 64 bit
+ * on 64 bit architectures only for binary compatibility reasons.
+ * Availability: SENSORS_DEVICE_API_VERSION_1_3
+ */
max_delay_t sensor_get_max_delay (int s)
{
char avail_sysfs_path[PATH_MAX];
float min_supported_rate = 1000;
float sr;
- /* continuous: maximum sampling period allowed in microseconds.
- * on-change, one-shot, special : 0
+ /* continuous, on-change: maximum sampling period allowed in microseconds.
+ * one-shot, special : 0
*/
-
- if (sensor_desc[s].flags)
+ if (REPORTING_MODE(sensor_desc[s].flags) == SENSOR_FLAG_ONE_SHOT_MODE ||
+ REPORTING_MODE(sensor_desc[s].flags) == SENSOR_FLAG_SPECIAL_REPORTING_MODE)
return 0;
sprintf(avail_sysfs_path, DEVICE_AVAIL_FREQ_PATH, dev_num);
- if (sysfs_read_str(avail_sysfs_path, freqs_buf, sizeof(freqs_buf)) < 0)
- return 0;
-
- cursor = freqs_buf;
- while (*cursor && cursor[0]) {
+ if (sysfs_read_str(avail_sysfs_path, freqs_buf, sizeof(freqs_buf)) < 0) {
+ /* If poll mode sensor */
+ if (!sensor_info[s].num_channels) {
+ /* The must rate */
+ min_supported_rate = get_cdd_freq(s, 1);
+ }
+ } else {
+ cursor = freqs_buf;
+ while (*cursor && cursor[0]) {
- /* Decode a single value */
- sr = strtod(cursor, NULL);
+ /* Decode a single value */
+ sr = strtod(cursor, NULL);
- if (sr < min_supported_rate)
- min_supported_rate = sr;
+ if (sr < min_supported_rate)
+ min_supported_rate = sr;
- /* Skip digits */
- while (cursor[0] && !isspace(cursor[0]))
- cursor++;
+ /* Skip digits */
+ while (cursor[0] && !isspace(cursor[0]))
+ cursor++;
- /* Skip spaces */
- while (cursor[0] && isspace(cursor[0]))
- cursor++;
+ /* Skip spaces */
+ while (cursor[0] && isspace(cursor[0]))
+ cursor++;
+ }
}
/* return 0 for wrong values */
/* Return microseconds */
return (max_delay_t)(1000000.0 / min_supported_rate);
}
+
+/* this value depends on the reporting mode:
+ *
+ * continuous: minimum sample period allowed in microseconds
+ * on-change : 0
+ * one-shot :-1
+ * special : 0, unless otherwise noted
+ */
+int32_t sensor_get_min_delay(int s)
+{
+ char avail_sysfs_path[PATH_MAX];
+ int dev_num = sensor_info[s].dev_num;
+ char freqs_buf[100];
+ char* cursor;
+ float max_supported_rate = 0;
+ float sr;
+
+ /* continuous: minimum sampling period allowed in microseconds.
+ * on-change, special : 0
+ * one-shot :-1
+ */
+ if (REPORTING_MODE(sensor_desc[s].flags) == SENSOR_FLAG_ON_CHANGE_MODE ||
+ REPORTING_MODE(sensor_desc[s].flags) == SENSOR_FLAG_SPECIAL_REPORTING_MODE)
+ return 0;
+
+ if (REPORTING_MODE(sensor_desc[s].flags) == SENSOR_FLAG_ONE_SHOT_MODE)
+ return -1;
+
+ sprintf(avail_sysfs_path, DEVICE_AVAIL_FREQ_PATH, dev_num);
+
+ if (sysfs_read_str(avail_sysfs_path, freqs_buf, sizeof(freqs_buf)) < 0) {
+ /* If poll mode sensor */
+ if (!sensor_info[s].num_channels) {
+ /* The should rate */
+ max_supported_rate = get_cdd_freq(s, 0);
+ }
+ } else {
+ cursor = freqs_buf;
+ while (*cursor && cursor[0]) {
+
+ /* Decode a single value */
+ sr = strtod(cursor, NULL);
+
+ if (sr > max_supported_rate && sr <= MAX_EVENTS)
+ max_supported_rate = sr;
+
+ /* Skip digits */
+ while (cursor[0] && !isspace(cursor[0]))
+ cursor++;
+
+ /* Skip spaces */
+ while (cursor[0] && isspace(cursor[0]))
+ cursor++;
+ }
+ }
+
+ /* return 0 for wrong values */
+ if (max_supported_rate < 0.1)
+ return 0;
+
+ /* Return microseconds */
+ return (int32_t)(1000000.0 / max_supported_rate);
+}
OSDN Git Service
