// SPDX-License-Identifier: GPL-2.0-only /* * HID Sensors Driver * Copyright (c) 2012, Intel Corporation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "hid-sensor-trigger.h" static ssize_t _hid_sensor_set_report_latency(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); int integer, fract, ret; int latency; ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract); if (ret) return ret; latency = integer * 1000 + fract / 1000; ret = hid_sensor_set_report_latency(attrb, latency); if (ret < 0) return len; attrb->latency_ms = hid_sensor_get_report_latency(attrb); return len; } static ssize_t _hid_sensor_get_report_latency(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); int latency; latency = hid_sensor_get_report_latency(attrb); if (latency < 0) return latency; return sprintf(buf, "%d.%06u\n", latency / 1000, (latency % 1000) * 1000); } static ssize_t _hid_sensor_get_fifo_state(struct device *dev, struct device_attribute *attr, char *buf) { struct iio_dev *indio_dev = dev_to_iio_dev(dev); struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); int latency; latency = hid_sensor_get_report_latency(attrb); if (latency < 0) return latency; return sprintf(buf, "%d\n", !!latency); } static IIO_DEVICE_ATTR(hwfifo_timeout, 0644, _hid_sensor_get_report_latency, _hid_sensor_set_report_latency, 0); static IIO_DEVICE_ATTR(hwfifo_enabled, 0444, _hid_sensor_get_fifo_state, NULL, 0); static const struct attribute *hid_sensor_fifo_attributes[] = { &iio_dev_attr_hwfifo_timeout.dev_attr.attr, &iio_dev_attr_hwfifo_enabled.dev_attr.attr, NULL, }; static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state) { int state_val; int report_val; s32 poll_value = 0; if (state) { if (sensor_hub_device_open(st->hsdev)) return -EIO; atomic_inc(&st->data_ready); state_val = hid_sensor_get_usage_index(st->hsdev, st->power_state.report_id, st->power_state.index, HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM); report_val = hid_sensor_get_usage_index(st->hsdev, st->report_state.report_id, st->report_state.index, HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM); poll_value = hid_sensor_read_poll_value(st); } else { int val; val = atomic_dec_if_positive(&st->data_ready); if (val < 0) return 0; sensor_hub_device_close(st->hsdev); state_val = hid_sensor_get_usage_index(st->hsdev, st->power_state.report_id, st->power_state.index, HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM); report_val = hid_sensor_get_usage_index(st->hsdev, st->report_state.report_id, st->report_state.index, HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM); } if (state_val >= 0) { state_val += st->power_state.logical_minimum; sensor_hub_set_feature(st->hsdev, st->power_state.report_id, st->power_state.index, sizeof(state_val), &state_val); } if (report_val >= 0) { report_val += st->report_state.logical_minimum; sensor_hub_set_feature(st->hsdev, st->report_state.report_id, st->report_state.index, sizeof(report_val), &report_val); } pr_debug("HID_SENSOR %s set power_state %d report_state %d\n", st->pdev->name, state_val, report_val); sensor_hub_get_feature(st->hsdev, st->power_state.report_id, st->power_state.index, sizeof(state_val), &state_val); if (state && poll_value) msleep_interruptible(poll_value * 2); return 0; } EXPORT_SYMBOL(hid_sensor_power_state); int hid_sensor_power_state(struct hid_sensor_common *st, bool state) { #ifdef CONFIG_PM int ret; if (atomic_add_unless(&st->runtime_pm_enable, 1, 1)) pm_runtime_enable(&st->pdev->dev); if (state) { atomic_inc(&st->user_requested_state); ret = pm_runtime_get_sync(&st->pdev->dev); } else { atomic_dec(&st->user_requested_state); pm_runtime_mark_last_busy(&st->pdev->dev); pm_runtime_use_autosuspend(&st->pdev->dev); ret = pm_runtime_put_autosuspend(&st->pdev->dev); } if (ret < 0) { if (state) pm_runtime_put_noidle(&st->pdev->dev); return ret; } return 0; #else atomic_set(&st->user_requested_state, state); return _hid_sensor_power_state(st, state); #endif } static void hid_sensor_set_power_work(struct work_struct *work) { struct hid_sensor_common *attrb = container_of(work, struct hid_sensor_common, work); if (attrb->poll_interval >= 0) sensor_hub_set_feature(attrb->hsdev, attrb->poll.report_id, attrb->poll.index, sizeof(attrb->poll_interval), &attrb->poll_interval); if (attrb->raw_hystersis >= 0) sensor_hub_set_feature(attrb->hsdev, attrb->sensitivity.report_id, attrb->sensitivity.index, sizeof(attrb->raw_hystersis), &attrb->raw_hystersis); if (attrb->latency_ms > 0) hid_sensor_set_report_latency(attrb, attrb->latency_ms); if (atomic_read(&attrb->user_requested_state)) _hid_sensor_power_state(attrb, true); } static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig, bool state) { return hid_sensor_power_state(iio_trigger_get_drvdata(trig), state); } void hid_sensor_remove_trigger(struct iio_dev *indio_dev, struct hid_sensor_common *attrb) { if (atomic_read(&attrb->runtime_pm_enable)) pm_runtime_disable(&attrb->pdev->dev); pm_runtime_set_suspended(&attrb->pdev->dev); pm_runtime_put_noidle(&attrb->pdev->dev); cancel_work_sync(&attrb->work); iio_trigger_unregister(attrb->trigger); iio_trigger_free(attrb->trigger); iio_triggered_buffer_cleanup(indio_dev); } EXPORT_SYMBOL(hid_sensor_remove_trigger); static const struct iio_trigger_ops hid_sensor_trigger_ops = { .set_trigger_state = &hid_sensor_data_rdy_trigger_set_state, }; int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, struct hid_sensor_common *attrb) { const struct attribute **fifo_attrs; int ret; struct iio_trigger *trig; if (hid_sensor_batch_mode_supported(attrb)) fifo_attrs = hid_sensor_fifo_attributes; else fifo_attrs = NULL; ret = iio_triggered_buffer_setup_ext(indio_dev, &iio_pollfunc_store_time, NULL, NULL, fifo_attrs); if (ret) { dev_err(&indio_dev->dev, "Triggered Buffer Setup Failed\n"); return ret; } trig = iio_trigger_alloc(indio_dev->dev.parent, "%s-dev%d", name, indio_dev->id); if (trig == NULL) { dev_err(&indio_dev->dev, "Trigger Allocate Failed\n"); ret = -ENOMEM; goto error_triggered_buffer_cleanup; } iio_trigger_set_drvdata(trig, attrb); trig->ops = &hid_sensor_trigger_ops; ret = iio_trigger_register(trig); if (ret) { dev_err(&indio_dev->dev, "Trigger Register Failed\n"); goto error_free_trig; } attrb->trigger = trig; indio_dev->trig = iio_trigger_get(trig); ret = pm_runtime_set_active(&indio_dev->dev); if (ret) goto error_unreg_trigger; iio_device_set_drvdata(indio_dev, attrb); INIT_WORK(&attrb->work, hid_sensor_set_power_work); pm_suspend_ignore_children(&attrb->pdev->dev, true); /* Default to 3 seconds, but can be changed from sysfs */ pm_runtime_set_autosuspend_delay(&attrb->pdev->dev, 3000); return ret; error_unreg_trigger: iio_trigger_unregister(trig); error_free_trig: iio_trigger_free(trig); error_triggered_buffer_cleanup: iio_triggered_buffer_cleanup(indio_dev); return ret; } EXPORT_SYMBOL(hid_sensor_setup_trigger); static int __maybe_unused hid_sensor_suspend(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); return _hid_sensor_power_state(attrb, false); } static int __maybe_unused hid_sensor_resume(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); schedule_work(&attrb->work); return 0; } static int __maybe_unused hid_sensor_runtime_resume(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); return _hid_sensor_power_state(attrb, true); } const struct dev_pm_ops hid_sensor_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(hid_sensor_suspend, hid_sensor_resume) SET_RUNTIME_PM_OPS(hid_sensor_suspend, hid_sensor_runtime_resume, NULL) }; EXPORT_SYMBOL(hid_sensor_pm_ops); MODULE_AUTHOR("Srinivas Pandruvada "); MODULE_DESCRIPTION("HID Sensor trigger processing"); MODULE_LICENSE("GPL");