2 * Copyright (C) 2014-2015 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.
31 if (enabled && sensor_get_quirks(handle) & QUIRK_INITIAL_RATE) {
32 ALOGI("Forcing initial sampling rate\n");
33 sensor_activate(handle, 1, 0);
34 sensor_set_delay(handle, 100000000); /* Start with 100 ms */
35 sensor_activate(handle, 0, 0);
37 /* Clear flag for this sensor as do this only once */
38 sensor[handle].quirks ^= QUIRK_INITIAL_RATE;
41 return sensor_activate(handle, enabled, 0);
45 static int set_delay (__attribute__((unused)) struct sensors_poll_device_t* dev,
46 int handle, int64_t ns)
50 if (init_count == 0 || handle < 0 || handle >= sensor_count)
54 * If this sensor relies on other sensors, try to propagate the
55 * requested sampling rate to the base sensors.
58 for (i=0; i<sensor[handle].base_count; i++)
59 sensor_set_delay(sensor[handle].base[i], ns);
61 return sensor_set_delay(handle, ns);
65 static int poll (__attribute__((unused)) struct sensors_poll_device_t* dev,
66 sensors_event_t* data, int count)
68 if (init_count == 0 || !data || count < 1)
71 return sensor_poll(data, count);
75 static int batch (__attribute__((unused)) struct sensors_poll_device_1* dev,
76 int sensor_handle, __attribute__((unused)) int flags,
77 int64_t sampling_period_ns,
78 __attribute__((unused)) int64_t max_report_latency_ns)
80 return set_delay ((struct sensors_poll_device_t*)dev,
81 sensor_handle, sampling_period_ns);
84 static int flush (__attribute__((unused)) struct sensors_poll_device_1* dev,
87 return sensor_flush (handle);
91 static int close_module (__attribute__((unused)) hw_device_t *device)
98 if (init_count == 0) {
99 ALOGI("Closing IIO sensors HAL module\n");
100 delete_enumeration_data();
101 delete_control_data();
108 static int initialize_module(const struct hw_module_t *module, const char *id,
109 struct hw_device_t** device)
111 static struct sensors_poll_device_1 poll_device;
113 if (strcmp(id, SENSORS_HARDWARE_POLL))
116 poll_device.common.tag = HARDWARE_DEVICE_TAG;
117 poll_device.common.version = SENSORS_DEVICE_API_VERSION_1_3;
118 poll_device.common.module = (struct hw_module_t*) module;
119 poll_device.common.close = close_module;
121 poll_device.activate = activate;
122 poll_device.setDelay = set_delay;
123 poll_device.poll = poll;
124 poll_device.batch = batch;
125 poll_device.flush = flush;
127 *device = &poll_device.common;
129 if (init_count == 0) {
130 ALOGI("Initializing IIO sensors HAL module\n");
131 allocate_control_data();
140 static struct hw_module_methods_t module_methods = {
141 .open = initialize_module
145 /* Externally visible module descriptor */
146 struct sensors_module_t __attribute__ ((visibility ("default")))
147 HAL_MODULE_INFO_SYM = {
149 .tag = HARDWARE_MODULE_TAG,
152 .id = SENSORS_HARDWARE_MODULE_ID,
153 .name = "IIO sensors HAL",
155 .methods = &module_methods,
157 .get_sensors_list = get_sensors_list