2 * Copyright (C) 2014 Intel Corporation.
5 #include <hardware/sensors.h>
7 #include "enumeration.h"
9 #include "description.h"
11 /* This is the IIO Sensors HAL module entry points file */
13 static int init_count;
15 static int activate (__attribute__((unused)) struct sensors_poll_device_t* dev,
16 int handle, int enabled)
18 if (init_count == 0 || handle < 0 || handle >= sensor_count)
22 * The Intel sensor hub seems to have trouble enabling sensors before
23 * a sampling rate has been configured, and setting the sampling rate
24 * after it's been enabled does not seem to revive affected sensors.
25 * The issue does not show up with an up to date ISH firmware but as the
26 * updater is a Windows only tool and is not widely available, implement
27 * a workaround for this behavior. We set the initial sampling rate to
28 * 10 events per second when the sensor is enabled for the first time.
30 if (enabled && sensor_get_quirks(handle) & QUIRK_INITIAL_RATE) {
31 ALOGI("Forcing initial sampling rate\n");
32 sensor_activate(handle, 1);
33 sensor_set_delay(handle, 100000000L); /* Start with 100 ms */
34 sensor_activate(handle, 0);
36 /* Clear flag for this sensor as do this only once */
37 sensor_info[handle].quirks ^= QUIRK_INITIAL_RATE;
40 return sensor_activate(handle, enabled);
44 static int set_delay (__attribute__((unused)) struct sensors_poll_device_t* dev,
45 int handle, int64_t ns)
47 if (init_count == 0 || handle < 0 || handle >= sensor_count)
50 return sensor_set_delay(handle, ns);
54 static int poll (__attribute__((unused)) struct sensors_poll_device_t* dev,
55 sensors_event_t* data, int count)
57 if (init_count == 0 || !data || count < 1)
60 return sensor_poll(data, count);
64 static int batch (__attribute__((unused)) struct sensors_poll_device_1* dev,
65 int sensor_handle, __attribute__((unused)) int flags,
66 int64_t sampling_period_ns,
67 __attribute__((unused)) int64_t max_report_latency_ns)
69 return set_delay ((struct sensors_poll_device_t*)dev,
70 sensor_handle, sampling_period_ns);
73 static int flush (__attribute__((unused)) struct sensors_poll_device_1* dev,
76 return sensor_flush (handle);
80 static int close_module (__attribute__((unused)) hw_device_t *device)
87 if (init_count == 0) {
88 ALOGI("Closing IIO sensors HAL module\n");
89 delete_enumeration_data();
90 delete_control_data();
97 static int initialize_module(const struct hw_module_t *module, const char *id,
98 struct hw_device_t** device)
100 static struct sensors_poll_device_1 poll_device;
102 if (strcmp(id, SENSORS_HARDWARE_POLL))
105 poll_device.common.tag = HARDWARE_DEVICE_TAG;
106 poll_device.common.version = SENSORS_DEVICE_API_VERSION_1_3;
107 poll_device.common.module = (struct hw_module_t*) module;
108 poll_device.common.close = close_module;
110 poll_device.activate = activate;
111 poll_device.setDelay = set_delay;
112 poll_device.poll = poll;
113 poll_device.batch = batch;
114 poll_device.flush = flush;
116 *device = &poll_device.common;
118 if (init_count == 0) {
119 ALOGI("Initializing IIO sensors HAL module\n");
120 allocate_control_data();
129 static struct hw_module_methods_t module_methods = {
130 .open = initialize_module
134 /* Externally visible module descriptor */
135 struct sensors_module_t __attribute__ ((visibility ("default")))
136 HAL_MODULE_INFO_SYM = {
138 .tag = HARDWARE_MODULE_TAG,
141 .id = SENSORS_HARDWARE_MODULE_ID,
142 .name = "IIO sensors HAL",
144 .methods = &module_methods,
146 .get_sensors_list = get_sensors_list