[linux-block.git] / drivers / iio / orientation / hid-sensor-incl-3d.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * HID Sensors Driver
 * Copyright (c) 2013, Intel Corporation.
 */

#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/hid-sensor-hub.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include "../common/hid-sensors/hid-sensor-trigger.h"

enum incl_3d_channel {
	CHANNEL_SCAN_INDEX_X,
	CHANNEL_SCAN_INDEX_Y,
	CHANNEL_SCAN_INDEX_Z,
	INCLI_3D_CHANNEL_MAX,
};

#define CHANNEL_SCAN_INDEX_TIMESTAMP INCLI_3D_CHANNEL_MAX

struct incl_3d_state {
	struct hid_sensor_hub_callbacks callbacks;
	struct hid_sensor_common common_attributes;
	struct hid_sensor_hub_attribute_info incl[INCLI_3D_CHANNEL_MAX];
	struct {
		u32 incl_val[INCLI_3D_CHANNEL_MAX];
		u64 timestamp __aligned(8);
	} scan;
	int scale_pre_decml;
	int scale_post_decml;
	int scale_precision;
	int value_offset;
	s64 timestamp;
};

static const u32 incl_3d_addresses[INCLI_3D_CHANNEL_MAX] = {
	HID_USAGE_SENSOR_ORIENT_TILT_X,
	HID_USAGE_SENSOR_ORIENT_TILT_Y,
	HID_USAGE_SENSOR_ORIENT_TILT_Z
};

static const u32 incl_3d_sensitivity_addresses[] = {
	HID_USAGE_SENSOR_DATA_ORIENTATION,
	HID_USAGE_SENSOR_ORIENT_TILT,
};

/* Channel definitions */
static const struct iio_chan_spec incl_3d_channels[] = {
	{
		.type = IIO_INCLI,
		.modified = 1,
		.channel2 = IIO_MOD_X,
		.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_X,
	}, {
		.type = IIO_INCLI,
		.modified = 1,
		.channel2 = IIO_MOD_Y,
		.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_Y,
	}, {
		.type = IIO_INCLI,
		.modified = 1,
		.channel2 = IIO_MOD_Z,
		.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_Z,
	},
	IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP),
};

/* Adjust channel real bits based on report descriptor */
static void incl_3d_adjust_channel_bit_mask(struct iio_chan_spec *chan,
						int size)
{
	chan->scan_type.sign = 's';
	/* Real storage bits will change based on the report desc. */
	chan->scan_type.realbits = size * 8;
	/* Maximum size of a sample to capture is u32 */
	chan->scan_type.storagebits = sizeof(u32) * 8;
}

/* Channel read_raw handler */
static int incl_3d_read_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan,
			      int *val, int *val2,
			      long mask)
{
	struct incl_3d_state *incl_state = iio_priv(indio_dev);
	int report_id = -1;
	u32 address;
	int ret_type;
	s32 min;

	*val = 0;
	*val2 = 0;
	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		hid_sensor_power_state(&incl_state->common_attributes, true);
		report_id = incl_state->incl[chan->scan_index].report_id;
		min = incl_state->incl[chan->scan_index].logical_minimum;
		address = incl_3d_addresses[chan->scan_index];
		if (report_id >= 0)
			*val = sensor_hub_input_attr_get_raw_value(
				incl_state->common_attributes.hsdev,
				HID_USAGE_SENSOR_INCLINOMETER_3D, address,
				report_id,
				SENSOR_HUB_SYNC,
				min < 0);
		else {
			hid_sensor_power_state(&incl_state->common_attributes,
						false);
			return -EINVAL;
		}
		hid_sensor_power_state(&incl_state->common_attributes, false);
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SCALE:
		*val = incl_state->scale_pre_decml;
		*val2 = incl_state->scale_post_decml;
		ret_type = incl_state->scale_precision;
		break;
	case IIO_CHAN_INFO_OFFSET:
		*val = incl_state->value_offset;
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SAMP_FREQ:
		ret_type = hid_sensor_read_samp_freq_value(
			&incl_state->common_attributes, val, val2);
		break;
	case IIO_CHAN_INFO_HYSTERESIS:
		ret_type = hid_sensor_read_raw_hyst_value(
			&incl_state->common_attributes, val, val2);
		break;
	default:
		ret_type = -EINVAL;
		break;
	}

	return ret_type;
}

/* Channel write_raw handler */
static int incl_3d_write_raw(struct iio_dev *indio_dev,
			       struct iio_chan_spec const *chan,
			       int val,
			       int val2,
			       long mask)
{
	struct incl_3d_state *incl_state = iio_priv(indio_dev);
	int ret;

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

	return ret;
}

static const struct iio_info incl_3d_info = {
	.read_raw = &incl_3d_read_raw,
	.write_raw = &incl_3d_write_raw,
};

/* Callback handler to send event after all samples are received and captured */
static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
				unsigned usage_id,
				void *priv)
{
	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	struct incl_3d_state *incl_state = iio_priv(indio_dev);

	dev_dbg(&indio_dev->dev, "incl_3d_proc_event\n");
	if (atomic_read(&incl_state->common_attributes.data_ready)) {
		if (!incl_state->timestamp)
			incl_state->timestamp = iio_get_time_ns(indio_dev);

		iio_push_to_buffers_with_timestamp(indio_dev,
						   &incl_state->scan,
						   incl_state->timestamp);

		incl_state->timestamp = 0;
	}

	return 0;
}

/* Capture samples in local storage */
static int incl_3d_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 incl_3d_state *incl_state = iio_priv(indio_dev);
	int ret = 0;

	switch (usage_id) {
	case HID_USAGE_SENSOR_ORIENT_TILT_X:
		incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data;
	break;
	case HID_USAGE_SENSOR_ORIENT_TILT_Y:
		incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data;
	break;
	case HID_USAGE_SENSOR_ORIENT_TILT_Z:
		incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data;
	break;
	case HID_USAGE_SENSOR_TIME_TIMESTAMP:
		incl_state->timestamp =
			hid_sensor_convert_timestamp(&incl_state->common_attributes,
						     *(s64 *)raw_data);
	break;
	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

/* Parse report which is specific to an usage id*/
static int incl_3d_parse_report(struct platform_device *pdev,
				struct hid_sensor_hub_device *hsdev,
				struct iio_chan_spec *channels,
				unsigned usage_id,
				struct incl_3d_state *st)
{
	int ret;

	ret = sensor_hub_input_get_attribute_info(hsdev,
				HID_INPUT_REPORT,
				usage_id,
				HID_USAGE_SENSOR_ORIENT_TILT_X,
				&st->incl[CHANNEL_SCAN_INDEX_X]);
	if (ret)
		return ret;
	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_X],
				st->incl[CHANNEL_SCAN_INDEX_X].size);

	ret = sensor_hub_input_get_attribute_info(hsdev,
				HID_INPUT_REPORT,
				usage_id,
				HID_USAGE_SENSOR_ORIENT_TILT_Y,
				&st->incl[CHANNEL_SCAN_INDEX_Y]);
	if (ret)
		return ret;
	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Y],
				st->incl[CHANNEL_SCAN_INDEX_Y].size);

	ret = sensor_hub_input_get_attribute_info(hsdev,
				HID_INPUT_REPORT,
				usage_id,
				HID_USAGE_SENSOR_ORIENT_TILT_Z,
				&st->incl[CHANNEL_SCAN_INDEX_Z]);
	if (ret)
		return ret;
	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Z],
				st->incl[CHANNEL_SCAN_INDEX_Z].size);

	dev_dbg(&pdev->dev, "incl_3d %x:%x, %x:%x, %x:%x\n",
			st->incl[0].index,
			st->incl[0].report_id,
			st->incl[1].index, st->incl[1].report_id,
			st->incl[2].index, st->incl[2].report_id);

	st->scale_precision = hid_sensor_format_scale(
				HID_USAGE_SENSOR_INCLINOMETER_3D,
				&st->incl[CHANNEL_SCAN_INDEX_X],
				&st->scale_pre_decml, &st->scale_post_decml);

	return ret;
}

/* Function to initialize the processing for usage id */
static int hid_incl_3d_probe(struct platform_device *pdev)
{
	int ret;
	static char *name = "incli_3d";
	struct iio_dev *indio_dev;
	struct incl_3d_state *incl_state;
	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;

	indio_dev = devm_iio_device_alloc(&pdev->dev,
					  sizeof(struct incl_3d_state));
	if (indio_dev == NULL)
		return -ENOMEM;

	platform_set_drvdata(pdev, indio_dev);

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

	ret = hid_sensor_parse_common_attributes(hsdev,
				HID_USAGE_SENSOR_INCLINOMETER_3D,
				&incl_state->common_attributes,
				incl_3d_sensitivity_addresses,
				ARRAY_SIZE(incl_3d_sensitivity_addresses));
	if (ret) {
		dev_err(&pdev->dev, "failed to setup common attributes\n");
		return ret;
	}

	indio_dev->channels = kmemdup(incl_3d_channels,
				      sizeof(incl_3d_channels), GFP_KERNEL);
	if (!indio_dev->channels) {
		dev_err(&pdev->dev, "failed to duplicate channels\n");
		return -ENOMEM;
	}

	ret = incl_3d_parse_report(pdev, hsdev,
				   (struct iio_chan_spec *)indio_dev->channels,
				   HID_USAGE_SENSOR_INCLINOMETER_3D,
				   incl_state);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup attributes\n");
		goto error_free_dev_mem;
	}

	indio_dev->num_channels = ARRAY_SIZE(incl_3d_channels);
	indio_dev->info = &incl_3d_info;
	indio_dev->name = name;
	indio_dev->modes = INDIO_DIRECT_MODE;

	atomic_set(&incl_state->common_attributes.data_ready, 0);

	ret = hid_sensor_setup_trigger(indio_dev, name,
					&incl_state->common_attributes);
	if (ret) {
		dev_err(&pdev->dev, "trigger setup failed\n");
		goto error_free_dev_mem;
	}

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

	incl_state->callbacks.send_event = incl_3d_proc_event;
	incl_state->callbacks.capture_sample = incl_3d_capture_sample;
	incl_state->callbacks.pdev = pdev;
	ret = sensor_hub_register_callback(hsdev,
					HID_USAGE_SENSOR_INCLINOMETER_3D,
					&incl_state->callbacks);
	if (ret) {
		dev_err(&pdev->dev, "callback reg failed\n");
		goto error_iio_unreg;
	}

	return 0;

error_iio_unreg:
	iio_device_unregister(indio_dev);
error_remove_trigger:
	hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes);
error_free_dev_mem:
	kfree(indio_dev->channels);
	return ret;
}

/* Function to deinitialize the processing for usage id */
static int hid_incl_3d_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 incl_3d_state *incl_state = iio_priv(indio_dev);

	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_INCLINOMETER_3D);
	iio_device_unregister(indio_dev);
	hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes);
	kfree(indio_dev->channels);

	return 0;
}

static const struct platform_device_id hid_incl_3d_ids[] = {
	{
		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
		.name = "HID-SENSOR-200086",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, hid_incl_3d_ids);

static struct platform_driver hid_incl_3d_platform_driver = {
	.id_table = hid_incl_3d_ids,
	.driver = {
		.name	= KBUILD_MODNAME,
		.pm	= &hid_sensor_pm_ops,
	},
	.probe		= hid_incl_3d_probe,
	.remove		= hid_incl_3d_remove,
};
module_platform_driver(hid_incl_3d_platform_driver);

MODULE_DESCRIPTION("HID Sensor Inclinometer 3D");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(IIO_HID);
Commit	Line	Data
f6cc69f1	1	// SPDX-License-Identifier: GPL-2.0-only
098d3bec SP	2	/*
	3	* HID Sensors Driver
	4	* Copyright (c) 2013, Intel Corporation.
098d3bec SP	5	*/
	6
	7	#include <linux/device.h>
	8	#include <linux/platform_device.h>
	9	#include <linux/module.h>
fb226ae7	10	#include <linux/mod_devicetable.h>
098d3bec SP	11	#include <linux/slab.h>
	12	#include <linux/hid-sensor-hub.h>
	13	#include <linux/iio/iio.h>
098d3bec	14	#include <linux/iio/buffer.h>
098d3bec SP	15	#include "../common/hid-sensors/hid-sensor-trigger.h"
	16
	17	enum incl_3d_channel {
	18	CHANNEL_SCAN_INDEX_X,
	19	CHANNEL_SCAN_INDEX_Y,
	20	CHANNEL_SCAN_INDEX_Z,
	21	INCLI_3D_CHANNEL_MAX,
	22	};
	23
04fe70d1 YX	24	#define CHANNEL_SCAN_INDEX_TIMESTAMP INCLI_3D_CHANNEL_MAX
04fe70d1 YX	25
098d3bec SP	26	struct incl_3d_state {
	27	struct hid_sensor_hub_callbacks callbacks;
	28	struct hid_sensor_common common_attributes;
	29	struct hid_sensor_hub_attribute_info incl[INCLI_3D_CHANNEL_MAX];
04fe70d1 YX	30	struct {
	31	u32 incl_val[INCLI_3D_CHANNEL_MAX];
	32	u64 timestamp __aligned(8);
	33	} scan;
be8e48d6 SP	34	int scale_pre_decml;
	35	int scale_post_decml;
	36	int scale_precision;
	37	int value_offset;
04fe70d1	38	s64 timestamp;
098d3bec SP	39	};
	40
	41	static const u32 incl_3d_addresses[INCLI_3D_CHANNEL_MAX] = {
	42	HID_USAGE_SENSOR_ORIENT_TILT_X,
	43	HID_USAGE_SENSOR_ORIENT_TILT_Y,
	44	HID_USAGE_SENSOR_ORIENT_TILT_Z
	45	};
	46
0e41fd51 YX	47	static const u32 incl_3d_sensitivity_addresses[] = {
0e41fd51 YX	48	HID_USAGE_SENSOR_DATA_ORIENTATION,
4efd13c3	49	HID_USAGE_SENSOR_ORIENT_TILT,
0e41fd51 YX	50	};
0e41fd51 YX	51
098d3bec SP	52	/* Channel definitions */
	53	static const struct iio_chan_spec incl_3d_channels[] = {
	54	{
	55	.type = IIO_INCLI,
	56	.modified = 1,
	57	.channel2 = IIO_MOD_X,
	58	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	59	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	60	BIT(IIO_CHAN_INFO_SCALE) \|
	61	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	62	BIT(IIO_CHAN_INFO_HYSTERESIS),
	63	.scan_index = CHANNEL_SCAN_INDEX_X,
	64	}, {
	65	.type = IIO_INCLI,
	66	.modified = 1,
	67	.channel2 = IIO_MOD_Y,
	68	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	69	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	70	BIT(IIO_CHAN_INFO_SCALE) \|
	71	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	72	BIT(IIO_CHAN_INFO_HYSTERESIS),
	73	.scan_index = CHANNEL_SCAN_INDEX_Y,
	74	}, {
	75	.type = IIO_INCLI,
	76	.modified = 1,
	77	.channel2 = IIO_MOD_Z,
	78	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	79	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	80	BIT(IIO_CHAN_INFO_SCALE) \|
	81	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	82	BIT(IIO_CHAN_INFO_HYSTERESIS),
	83	.scan_index = CHANNEL_SCAN_INDEX_Z,
04fe70d1 YX	84	},
04fe70d1 YX	85	IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP),
098d3bec SP	86	};
	87
	88	/* Adjust channel real bits based on report descriptor */
	89	static void incl_3d_adjust_channel_bit_mask(struct iio_chan_spec *chan,
	90	int size)
	91	{
	92	chan->scan_type.sign = 's';
	93	/* Real storage bits will change based on the report desc. */
	94	chan->scan_type.realbits = size * 8;
	95	/* Maximum size of a sample to capture is u32 */
	96	chan->scan_type.storagebits = sizeof(u32) * 8;
	97	}
	98
	99	/* Channel read_raw handler */
	100	static int incl_3d_read_raw(struct iio_dev *indio_dev,
	101	struct iio_chan_spec const *chan,
	102	int val, int val2,
	103	long mask)
	104	{
	105	struct incl_3d_state *incl_state = iio_priv(indio_dev);
	106	int report_id = -1;
	107	u32 address;
	108	int ret_type;
0145b505	109	s32 min;
098d3bec SP	110
	111	*val = 0;
	112	*val2 = 0;
	113	switch (mask) {
	114	case IIO_CHAN_INFO_RAW:
6fe588e5	115	hid_sensor_power_state(&incl_state->common_attributes, true);
0145b505 HG	116	report_id = incl_state->incl[chan->scan_index].report_id;
0145b505 HG	117	min = incl_state->incl[chan->scan_index].logical_minimum;
098d3bec SP	118	address = incl_3d_addresses[chan->scan_index];
	119	if (report_id >= 0)
	120	*val = sensor_hub_input_attr_get_raw_value(
	121	incl_state->common_attributes.hsdev,
	122	HID_USAGE_SENSOR_INCLINOMETER_3D, address,
b3f4737d	123	report_id,
0145b505 HG	124	SENSOR_HUB_SYNC,
0145b505 HG	125	min < 0);
098d3bec	126	else {
6fe588e5 SP	127	hid_sensor_power_state(&incl_state->common_attributes,
6fe588e5 SP	128	false);
098d3bec SP	129	return -EINVAL;
098d3bec SP	130	}
6fe588e5	131	hid_sensor_power_state(&incl_state->common_attributes, false);
098d3bec SP	132	ret_type = IIO_VAL_INT;
	133	break;
	134	case IIO_CHAN_INFO_SCALE:
be8e48d6 SP	135	*val = incl_state->scale_pre_decml;
	136	*val2 = incl_state->scale_post_decml;
	137	ret_type = incl_state->scale_precision;
098d3bec SP	138	break;
098d3bec SP	139	case IIO_CHAN_INFO_OFFSET:
be8e48d6	140	*val = incl_state->value_offset;
098d3bec SP	141	ret_type = IIO_VAL_INT;
	142	break;
	143	case IIO_CHAN_INFO_SAMP_FREQ:
	144	ret_type = hid_sensor_read_samp_freq_value(
	145	&incl_state->common_attributes, val, val2);
	146	break;
	147	case IIO_CHAN_INFO_HYSTERESIS:
	148	ret_type = hid_sensor_read_raw_hyst_value(
	149	&incl_state->common_attributes, val, val2);
	150	break;
	151	default:
	152	ret_type = -EINVAL;
	153	break;
	154	}
	155
	156	return ret_type;
	157	}
	158
	159	/* Channel write_raw handler */
	160	static int incl_3d_write_raw(struct iio_dev *indio_dev,
	161	struct iio_chan_spec const *chan,
	162	int val,
	163	int val2,
	164	long mask)
	165	{
	166	struct incl_3d_state *incl_state = iio_priv(indio_dev);
	167	int ret;
	168
	169	switch (mask) {
	170	case IIO_CHAN_INFO_SAMP_FREQ:
	171	ret = hid_sensor_write_samp_freq_value(
	172	&incl_state->common_attributes, val, val2);
	173	break;
	174	case IIO_CHAN_INFO_HYSTERESIS:
	175	ret = hid_sensor_write_raw_hyst_value(
	176	&incl_state->common_attributes, val, val2);
	177	break;
	178	default:
	179	ret = -EINVAL;
	180	}
	181
	182	return ret;
	183	}
	184
	185	static const struct iio_info incl_3d_info = {
098d3bec SP	186	.read_raw = &incl_3d_read_raw,
	187	.write_raw = &incl_3d_write_raw,
	188	};
	189
098d3bec SP	190	/* Callback handler to send event after all samples are received and captured */
	191	static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
	192	unsigned usage_id,
	193	void *priv)
	194	{
	195	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	196	struct incl_3d_state *incl_state = iio_priv(indio_dev);
	197
56ff6be6	198	dev_dbg(&indio_dev->dev, "incl_3d_proc_event\n");
04fe70d1 YX	199	if (atomic_read(&incl_state->common_attributes.data_ready)) {
	200	if (!incl_state->timestamp)
	201	incl_state->timestamp = iio_get_time_ns(indio_dev);
	202
	203	iio_push_to_buffers_with_timestamp(indio_dev,
	204	&incl_state->scan,
	205	incl_state->timestamp);
	206
	207	incl_state->timestamp = 0;
	208	}
098d3bec SP	209
	210	return 0;
	211	}
	212
	213	/* Capture samples in local storage */
	214	static int incl_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
	215	unsigned usage_id,
	216	size_t raw_len, char *raw_data,
	217	void *priv)
	218	{
	219	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	220	struct incl_3d_state *incl_state = iio_priv(indio_dev);
	221	int ret = 0;
	222
	223	switch (usage_id) {
	224	case HID_USAGE_SENSOR_ORIENT_TILT_X:
04fe70d1	225	incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_X] = (u32 )raw_data;
098d3bec SP	226	break;
098d3bec SP	227	case HID_USAGE_SENSOR_ORIENT_TILT_Y:
04fe70d1	228	incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Y] = (u32 )raw_data;
098d3bec SP	229	break;
098d3bec SP	230	case HID_USAGE_SENSOR_ORIENT_TILT_Z:
04fe70d1 YX	231	incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Z] = (u32 )raw_data;
	232	break;
	233	case HID_USAGE_SENSOR_TIME_TIMESTAMP:
	234	incl_state->timestamp =
	235	hid_sensor_convert_timestamp(&incl_state->common_attributes,
	236	(s64 )raw_data);
098d3bec SP	237	break;
	238	default:
	239	ret = -EINVAL;
	240	break;
	241	}
	242
	243	return ret;
	244	}
	245
	246	/* Parse report which is specific to an usage id*/
	247	static int incl_3d_parse_report(struct platform_device *pdev,
	248	struct hid_sensor_hub_device *hsdev,
	249	struct iio_chan_spec *channels,
	250	unsigned usage_id,
	251	struct incl_3d_state *st)
	252	{
	253	int ret;
	254
	255	ret = sensor_hub_input_get_attribute_info(hsdev,
	256	HID_INPUT_REPORT,
	257	usage_id,
	258	HID_USAGE_SENSOR_ORIENT_TILT_X,
	259	&st->incl[CHANNEL_SCAN_INDEX_X]);
	260	if (ret)
	261	return ret;
	262	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_X],
	263	st->incl[CHANNEL_SCAN_INDEX_X].size);
	264
	265	ret = sensor_hub_input_get_attribute_info(hsdev,
	266	HID_INPUT_REPORT,
	267	usage_id,
	268	HID_USAGE_SENSOR_ORIENT_TILT_Y,
	269	&st->incl[CHANNEL_SCAN_INDEX_Y]);
	270	if (ret)
	271	return ret;
	272	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Y],
	273	st->incl[CHANNEL_SCAN_INDEX_Y].size);
	274
	275	ret = sensor_hub_input_get_attribute_info(hsdev,
	276	HID_INPUT_REPORT,
	277	usage_id,
	278	HID_USAGE_SENSOR_ORIENT_TILT_Z,
	279	&st->incl[CHANNEL_SCAN_INDEX_Z]);
	280	if (ret)
	281	return ret;
	282	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Z],
	283	st->incl[CHANNEL_SCAN_INDEX_Z].size);
	284
	285	dev_dbg(&pdev->dev, "incl_3d %x:%x, %x:%x, %x:%x\n",
	286	st->incl[0].index,
	287	st->incl[0].report_id,
	288	st->incl[1].index, st->incl[1].report_id,
	289	st->incl[2].index, st->incl[2].report_id);
	290
be8e48d6 SP	291	st->scale_precision = hid_sensor_format_scale(
	292	HID_USAGE_SENSOR_INCLINOMETER_3D,
	293	&st->incl[CHANNEL_SCAN_INDEX_X],
	294	&st->scale_pre_decml, &st->scale_post_decml);
	295
098d3bec SP	296	return ret;
	297	}
	298
	299	/* Function to initialize the processing for usage id */
	300	static int hid_incl_3d_probe(struct platform_device *pdev)
	301	{
	302	int ret;
	303	static char *name = "incli_3d";
	304	struct iio_dev *indio_dev;
	305	struct incl_3d_state *incl_state;
	306	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
098d3bec SP	307
	308	indio_dev = devm_iio_device_alloc(&pdev->dev,
	309	sizeof(struct incl_3d_state));
	310	if (indio_dev == NULL)
	311	return -ENOMEM;
	312
	313	platform_set_drvdata(pdev, indio_dev);
	314
	315	incl_state = iio_priv(indio_dev);
	316	incl_state->common_attributes.hsdev = hsdev;
	317	incl_state->common_attributes.pdev = pdev;
	318
	319	ret = hid_sensor_parse_common_attributes(hsdev,
	320	HID_USAGE_SENSOR_INCLINOMETER_3D,
0e41fd51 YX	321	&incl_state->common_attributes,
	322	incl_3d_sensitivity_addresses,
	323	ARRAY_SIZE(incl_3d_sensitivity_addresses));
098d3bec SP	324	if (ret) {
	325	dev_err(&pdev->dev, "failed to setup common attributes\n");
	326	return ret;
	327	}
	328
32ee56e3 FE	329	indio_dev->channels = kmemdup(incl_3d_channels,
	330	sizeof(incl_3d_channels), GFP_KERNEL);
	331	if (!indio_dev->channels) {
098d3bec SP	332	dev_err(&pdev->dev, "failed to duplicate channels\n");
	333	return -ENOMEM;
	334	}
	335
32ee56e3 FE	336	ret = incl_3d_parse_report(pdev, hsdev,
	337	(struct iio_chan_spec *)indio_dev->channels,
	338	HID_USAGE_SENSOR_INCLINOMETER_3D,
	339	incl_state);
098d3bec SP	340	if (ret) {
	341	dev_err(&pdev->dev, "failed to setup attributes\n");
	342	goto error_free_dev_mem;
	343	}
	344
098d3bec	345	indio_dev->num_channels = ARRAY_SIZE(incl_3d_channels);
098d3bec SP	346	indio_dev->info = &incl_3d_info;
	347	indio_dev->name = name;
	348	indio_dev->modes = INDIO_DIRECT_MODE;
	349
56ff6be6	350	atomic_set(&incl_state->common_attributes.data_ready, 0);
067fda1c	351
098d3bec SP	352	ret = hid_sensor_setup_trigger(indio_dev, name,
	353	&incl_state->common_attributes);
	354	if (ret) {
	355	dev_err(&pdev->dev, "trigger setup failed\n");
067fda1c	356	goto error_free_dev_mem;
098d3bec SP	357	}
	358
	359	ret = iio_device_register(indio_dev);
	360	if (ret) {
	361	dev_err(&pdev->dev, "device register failed\n");
	362	goto error_remove_trigger;
	363	}
	364
	365	incl_state->callbacks.send_event = incl_3d_proc_event;
	366	incl_state->callbacks.capture_sample = incl_3d_capture_sample;
	367	incl_state->callbacks.pdev = pdev;
	368	ret = sensor_hub_register_callback(hsdev,
	369	HID_USAGE_SENSOR_INCLINOMETER_3D,
	370	&incl_state->callbacks);
	371	if (ret) {
	372	dev_err(&pdev->dev, "callback reg failed\n");
	373	goto error_iio_unreg;
	374	}
	375
	376	return 0;
	377
	378	error_iio_unreg:
	379	iio_device_unregister(indio_dev);
	380	error_remove_trigger:
067fda1c	381	hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes);
098d3bec SP	382	error_free_dev_mem:
	383	kfree(indio_dev->channels);
	384	return ret;
	385	}
	386
	387	/* Function to deinitialize the processing for usage id */
	388	static int hid_incl_3d_remove(struct platform_device *pdev)
	389	{
	390	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	391	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
	392	struct incl_3d_state *incl_state = iio_priv(indio_dev);
	393
	394	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_INCLINOMETER_3D);
	395	iio_device_unregister(indio_dev);
067fda1c	396	hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes);
098d3bec SP	397	kfree(indio_dev->channels);
	398
	399	return 0;
	400	}
	401
5dd86df0	402	static const struct platform_device_id hid_incl_3d_ids[] = {
098d3bec SP	403	{
	404	/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
	405	.name = "HID-SENSOR-200086",
	406	},
	407	{ /* sentinel */ }
	408	};
	409	MODULE_DEVICE_TABLE(platform, hid_incl_3d_ids);
	410
	411	static struct platform_driver hid_incl_3d_platform_driver = {
	412	.id_table = hid_incl_3d_ids,
	413	.driver = {
	414	.name = KBUILD_MODNAME,
feb2b06d	415	.pm = &hid_sensor_pm_ops,
098d3bec SP	416	},
	417	.probe = hid_incl_3d_probe,
	418	.remove = hid_incl_3d_remove,
	419	};
	420	module_platform_driver(hid_incl_3d_platform_driver);
	421
	422	MODULE_DESCRIPTION("HID Sensor Inclinometer 3D");
	423	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	424	MODULE_LICENSE("GPL");
12f13d1f	425	MODULE_IMPORT_NS(IIO_HID);