iio: hid-sensors: Added Proximity Sensor Driver (39a3a013) · Commits · 戴 / test

drivers/iio/light/Kconfig

+14 −0

Original line number	Diff line number	Diff line
		@@ -73,6 +73,20 @@ config HID_SENSOR_ALS
		Say yes here to build support for the HID SENSOR
		Ambient light sensor.

		config HID_SENSOR_PROX
		depends on HID_SENSOR_HUB
		select IIO_BUFFER
		select IIO_TRIGGERED_BUFFER
		select HID_SENSOR_IIO_COMMON
		select HID_SENSOR_IIO_TRIGGER
		tristate "HID PROX"
		help
		Say yes here to build support for the HID SENSOR
		Proximity sensor.

		To compile this driver as a module, choose M here: the
		module will be called hid-sensor-prox.

		config SENSORS_LM3533
		tristate "LM3533 ambient light sensor"
		depends on MFD_LM3533

drivers/iio/light/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -9,6 +9,7 @@ obj-$(CONFIG_CM32181) += cm32181.o
		obj-$(CONFIG_CM36651) += cm36651.o
		obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o
		obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o
		obj-$(CONFIG_HID_SENSOR_PROX) += hid-sensor-prox.o
		obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o
		obj-$(CONFIG_LTR501) += ltr501.o
		obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o

drivers/iio/light/hid-sensor-prox.c

0 → 100644

+375 −0

Original line number	Diff line number	Diff line
		/*
		* HID Sensors Driver
		* Copyright (c) 2014, Intel Corporation.
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms and conditions of the GNU General Public License,
		* version 2, as published by the Free Software Foundation.
		*
		* This program is distributed in the hope it will be useful, but WITHOUT
		* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
		* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
		* more details.
		*
		* You should have received a copy of the GNU General Public License along with
		* this program.
		*
		*/
		#include <linux/device.h>
		#include <linux/platform_device.h>
		#include <linux/module.h>
		#include <linux/interrupt.h>
		#include <linux/irq.h>
		#include <linux/slab.h>
		#include <linux/hid-sensor-hub.h>
		#include <linux/iio/iio.h>
		#include <linux/iio/sysfs.h>
		#include <linux/iio/buffer.h>
		#include <linux/iio/trigger_consumer.h>
		#include <linux/iio/triggered_buffer.h>
		#include "../common/hid-sensors/hid-sensor-trigger.h"

		#define CHANNEL_SCAN_INDEX_PRESENCE 0

		struct prox_state {
		struct hid_sensor_hub_callbacks callbacks;
		struct hid_sensor_common common_attributes;
		struct hid_sensor_hub_attribute_info prox_attr;
		u32 human_presence;
		};

		/* Channel definitions */
		static const struct iio_chan_spec prox_channels[] = {
		{
		.type = IIO_PROXIMITY,
		.modified = 1,
		.channel2 = IIO_NO_MOD,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
		BIT(IIO_CHAN_INFO_SCALE) \|
		BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
		BIT(IIO_CHAN_INFO_HYSTERESIS),
		.scan_index = CHANNEL_SCAN_INDEX_PRESENCE,
		}
		};

		/* Adjust channel real bits based on report descriptor */
		static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
		int channel, int size)
		{
		channels[channel].scan_type.sign = 's';
		/* Real storage bits will change based on the report desc. */
		channels[channel].scan_type.realbits = size * 8;
		/* Maximum size of a sample to capture is u32 */
		channels[channel].scan_type.storagebits = sizeof(u32) * 8;
		}

		/* Channel read_raw handler */
		static int prox_read_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const *chan,
		int val, int val2,
		long mask)
		{
		struct prox_state *prox_state = iio_priv(indio_dev);
		int report_id = -1;
		u32 address;
		int ret;
		int ret_type;

		*val = 0;
		*val2 = 0;
		switch (mask) {
		case IIO_CHAN_INFO_RAW:
		switch (chan->scan_index) {
		case CHANNEL_SCAN_INDEX_PRESENCE:
		report_id = prox_state->prox_attr.report_id;
		address =
		HID_USAGE_SENSOR_HUMAN_PRESENCE;
		break;
		default:
		report_id = -1;
		break;
		}
		if (report_id >= 0)
		*val = sensor_hub_input_attr_get_raw_value(
		prox_state->common_attributes.hsdev,
		HID_USAGE_SENSOR_PROX, address,
		report_id);
		else {
		*val = 0;
		return -EINVAL;
		}
		ret_type = IIO_VAL_INT;
		break;
		case IIO_CHAN_INFO_SCALE:
		*val = prox_state->prox_attr.units;
		ret_type = IIO_VAL_INT;
		break;
		case IIO_CHAN_INFO_OFFSET:
		*val = hid_sensor_convert_exponent(
		prox_state->prox_attr.unit_expo);
		ret_type = IIO_VAL_INT;
		break;
		case IIO_CHAN_INFO_SAMP_FREQ:
		ret = hid_sensor_read_samp_freq_value(
		&prox_state->common_attributes, val, val2);
		ret_type = IIO_VAL_INT_PLUS_MICRO;
		break;
		case IIO_CHAN_INFO_HYSTERESIS:
		ret = hid_sensor_read_raw_hyst_value(
		&prox_state->common_attributes, val, val2);
		ret_type = IIO_VAL_INT_PLUS_MICRO;
		break;
		default:
		ret_type = -EINVAL;
		break;
		}

		return ret_type;
		}

		/* Channel write_raw handler */
		static int prox_write_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const *chan,
		int val,
		int val2,
		long mask)
		{
		struct prox_state *prox_state = iio_priv(indio_dev);
		int ret = 0;

		switch (mask) {
		case IIO_CHAN_INFO_SAMP_FREQ:
		ret = hid_sensor_write_samp_freq_value(
		&prox_state->common_attributes, val, val2);
		break;
		case IIO_CHAN_INFO_HYSTERESIS:
		ret = hid_sensor_write_raw_hyst_value(
		&prox_state->common_attributes, val, val2);
		break;
		default:
		ret = -EINVAL;
		}

		return ret;
		}

		static const struct iio_info prox_info = {
		.driver_module = THIS_MODULE,
		.read_raw = &prox_read_raw,
		.write_raw = &prox_write_raw,
		};

		/* Function to push data to buffer */
		static void hid_sensor_push_data(struct iio_dev indio_dev, const void data,
		int len)
		{
		dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
		iio_push_to_buffers(indio_dev, data);
		}

		/* Callback handler to send event after all samples are received and captured */
		static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
		unsigned usage_id,
		void *priv)
		{
		struct iio_dev *indio_dev = platform_get_drvdata(priv);
		struct prox_state *prox_state = iio_priv(indio_dev);

		dev_dbg(&indio_dev->dev, "prox_proc_event [%d]\n",
		prox_state->common_attributes.data_ready);
		if (prox_state->common_attributes.data_ready)
		hid_sensor_push_data(indio_dev,
		&prox_state->human_presence,
		sizeof(prox_state->human_presence));

		return 0;
		}

		/* Capture samples in local storage */
		static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
		unsigned usage_id,
		size_t raw_len, char *raw_data,
		void *priv)
		{
		struct iio_dev *indio_dev = platform_get_drvdata(priv);
		struct prox_state *prox_state = iio_priv(indio_dev);
		int ret = -EINVAL;

		switch (usage_id) {
		case HID_USAGE_SENSOR_HUMAN_PRESENCE:
		prox_state->human_presence = (u32 )raw_data;
		ret = 0;
		break;
		default:
		break;
		}

		return ret;
		}

		/* Parse report which is specific to an usage id*/
		static int prox_parse_report(struct platform_device *pdev,
		struct hid_sensor_hub_device *hsdev,
		struct iio_chan_spec *channels,
		unsigned usage_id,
		struct prox_state *st)
		{
		int ret;

		ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
		usage_id,
		HID_USAGE_SENSOR_HUMAN_PRESENCE,
		&st->prox_attr);
		if (ret < 0)
		return ret;
		prox_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_PRESENCE,
		st->prox_attr.size);

		dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
		st->prox_attr.report_id);

		/* Set Sensitivity field ids, when there is no individual modifier */
		if (st->common_attributes.sensitivity.index < 0) {
		sensor_hub_input_get_attribute_info(hsdev,
		HID_FEATURE_REPORT, usage_id,
		HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS \|
		HID_USAGE_SENSOR_DATA_PRESENCE,
		&st->common_attributes.sensitivity);
		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
		st->common_attributes.sensitivity.index,
		st->common_attributes.sensitivity.report_id);
		}
		return ret;
		}

		/* Function to initialize the processing for usage id */
		static int hid_prox_probe(struct platform_device *pdev)
		{
		int ret = 0;
		static const char *name = "prox";
		struct iio_dev *indio_dev;
		struct prox_state *prox_state;
		struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
		struct iio_chan_spec *channels;

		indio_dev = devm_iio_device_alloc(&pdev->dev,
		sizeof(struct prox_state));
		if (!indio_dev)
		return -ENOMEM;
		platform_set_drvdata(pdev, indio_dev);

		prox_state = iio_priv(indio_dev);
		prox_state->common_attributes.hsdev = hsdev;
		prox_state->common_attributes.pdev = pdev;

		ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_PROX,
		&prox_state->common_attributes);
		if (ret) {
		dev_err(&pdev->dev, "failed to setup common attributes\n");
		return ret;
		}

		channels = kmemdup(prox_channels, sizeof(prox_channels), GFP_KERNEL);
		if (!channels) {
		dev_err(&pdev->dev, "failed to duplicate channels\n");
		return -ENOMEM;
		}

		ret = prox_parse_report(pdev, hsdev, channels,
		HID_USAGE_SENSOR_PROX, prox_state);
		if (ret) {
		dev_err(&pdev->dev, "failed to setup attributes\n");
		goto error_free_dev_mem;
		}

		indio_dev->channels = channels;
		indio_dev->num_channels =
		ARRAY_SIZE(prox_channels);
		indio_dev->dev.parent = &pdev->dev;
		indio_dev->info = &prox_info;
		indio_dev->name = name;
		indio_dev->modes = INDIO_DIRECT_MODE;

		ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
		NULL, NULL);
		if (ret) {
		dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
		goto error_free_dev_mem;
		}
		prox_state->common_attributes.data_ready = false;
		ret = hid_sensor_setup_trigger(indio_dev, name,
		&prox_state->common_attributes);
		if (ret) {
		dev_err(&pdev->dev, "trigger setup failed\n");
		goto error_unreg_buffer_funcs;
		}

		ret = iio_device_register(indio_dev);
		if (ret) {
		dev_err(&pdev->dev, "device register failed\n");
		goto error_remove_trigger;
		}

		prox_state->callbacks.send_event = prox_proc_event;
		prox_state->callbacks.capture_sample = prox_capture_sample;
		prox_state->callbacks.pdev = pdev;
		ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_PROX,
		&prox_state->callbacks);
		if (ret < 0) {
		dev_err(&pdev->dev, "callback reg failed\n");
		goto error_iio_unreg;
		}

		return ret;

		error_iio_unreg:
		iio_device_unregister(indio_dev);
		error_remove_trigger:
		hid_sensor_remove_trigger(&prox_state->common_attributes);
		error_unreg_buffer_funcs:
		iio_triggered_buffer_cleanup(indio_dev);
		error_free_dev_mem:
		kfree(indio_dev->channels);
		return ret;
		}

		/* Function to deinitialize the processing for usage id */
		static int hid_prox_remove(struct platform_device *pdev)
		{
		struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
		struct iio_dev *indio_dev = platform_get_drvdata(pdev);
		struct prox_state *prox_state = iio_priv(indio_dev);

		sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
		iio_device_unregister(indio_dev);
		hid_sensor_remove_trigger(&prox_state->common_attributes);
		iio_triggered_buffer_cleanup(indio_dev);
		kfree(indio_dev->channels);

		return 0;
		}

		static struct platform_device_id hid_prox_ids[] = {
		{
		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
		.name = "HID-SENSOR-200011",
		},
		{ /* sentinel */ }
		};
		MODULE_DEVICE_TABLE(platform, hid_prox_ids);

		static struct platform_driver hid_prox_platform_driver = {
		.id_table = hid_prox_ids,
		.driver = {
		.name = KBUILD_MODNAME,
		.owner = THIS_MODULE,
		},
		.probe = hid_prox_probe,
		.remove = hid_prox_remove,
		};
		module_platform_driver(hid_prox_platform_driver);

		MODULE_DESCRIPTION("HID Sensor Proximity");
		MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
		MODULE_LICENSE("GPL");

include/linux/hid-sensor-ids.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -33,6 +33,11 @@
		#define HID_USAGE_SENSOR_DATA_LIGHT 0x2004d0
		#define HID_USAGE_SENSOR_LIGHT_ILLUM 0x2004d1

		/* PROX (200011) */
		#define HID_USAGE_SENSOR_PROX 0x200011
		#define HID_USAGE_SENSOR_DATA_PRESENCE 0x2004b0
		#define HID_USAGE_SENSOR_HUMAN_PRESENCE 0x2004b1

		/* Gyro 3D: (200076) */
		#define HID_USAGE_SENSOR_GYRO_3D 0x200076
		#define HID_USAGE_SENSOR_DATA_ANGL_VELOCITY 0x200456

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