[linux-block.git] / drivers / iio / orientation / hid-sensor-rotation.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * HID Sensors Driver
 * Copyright (c) 2014, Intel Corporation.
 */

#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 "../common/hid-sensors/hid-sensor-trigger.h"

struct dev_rot_state {
	struct hid_sensor_hub_callbacks callbacks;
	struct hid_sensor_common common_attributes;
	struct hid_sensor_hub_attribute_info quaternion;
	struct {
		s32 sampled_vals[4] __aligned(16);
		u64 timestamp __aligned(8);
	} scan;
	int scale_pre_decml;
	int scale_post_decml;
	int scale_precision;
	int value_offset;
	s64 timestamp;
};

static const u32 rotation_sensitivity_addresses[] = {
	HID_USAGE_SENSOR_DATA_ORIENTATION,
};

/* Channel definitions */
static const struct iio_chan_spec dev_rot_channels[] = {
	{
		.type = IIO_ROT,
		.modified = 1,
		.channel2 = IIO_MOD_QUATERNION,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
					BIT(IIO_CHAN_INFO_OFFSET) |
					BIT(IIO_CHAN_INFO_SCALE) |
					BIT(IIO_CHAN_INFO_HYSTERESIS),
		.scan_index = 0
	},
	IIO_CHAN_SOFT_TIMESTAMP(1)
};

/* Adjust channel real bits based on report descriptor */
static void dev_rot_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;
	chan->scan_type.repeat = 4;
}

/* Channel read_raw handler */
static int dev_rot_read_raw(struct iio_dev *indio_dev,
				struct iio_chan_spec const *chan,
				int size, int *vals, int *val_len,
				long mask)
{
	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	int ret_type;
	int i;

	vals[0] = 0;
	vals[1] = 0;

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		if (size >= 4) {
			for (i = 0; i < 4; ++i)
				vals[i] = rot_state->scan.sampled_vals[i];
			ret_type = IIO_VAL_INT_MULTIPLE;
			*val_len =  4;
		} else
			ret_type = -EINVAL;
		break;
	case IIO_CHAN_INFO_SCALE:
		vals[0] = rot_state->scale_pre_decml;
		vals[1] = rot_state->scale_post_decml;
		return rot_state->scale_precision;

	case IIO_CHAN_INFO_OFFSET:
		*vals = rot_state->value_offset;
		return IIO_VAL_INT;

	case IIO_CHAN_INFO_SAMP_FREQ:
		ret_type = hid_sensor_read_samp_freq_value(
			&rot_state->common_attributes, &vals[0], &vals[1]);
		break;
	case IIO_CHAN_INFO_HYSTERESIS:
		ret_type = hid_sensor_read_raw_hyst_value(
			&rot_state->common_attributes, &vals[0], &vals[1]);
		break;
	default:
		ret_type = -EINVAL;
		break;
	}

	return ret_type;
}

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

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

	return ret;
}

static const struct iio_info dev_rot_info = {
	.read_raw_multi = &dev_rot_read_raw,
	.write_raw = &dev_rot_write_raw,
};

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

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

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

		rot_state->timestamp = 0;
	}

	return 0;
}

/* Capture samples in local storage */
static int dev_rot_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 dev_rot_state *rot_state = iio_priv(indio_dev);

	if (usage_id == HID_USAGE_SENSOR_ORIENT_QUATERNION) {
		if (raw_len / 4 == sizeof(s16)) {
			rot_state->scan.sampled_vals[0] = ((s16 *)raw_data)[0];
			rot_state->scan.sampled_vals[1] = ((s16 *)raw_data)[1];
			rot_state->scan.sampled_vals[2] = ((s16 *)raw_data)[2];
			rot_state->scan.sampled_vals[3] = ((s16 *)raw_data)[3];
		} else {
			memcpy(&rot_state->scan.sampled_vals, raw_data,
			       sizeof(rot_state->scan.sampled_vals));
		}

		dev_dbg(&indio_dev->dev, "Recd Quat len:%zu::%zu\n", raw_len,
			sizeof(rot_state->scan.sampled_vals));
	} else if (usage_id == HID_USAGE_SENSOR_TIME_TIMESTAMP) {
		rot_state->timestamp = hid_sensor_convert_timestamp(&rot_state->common_attributes,
								    *(s64 *)raw_data);
	}

	return 0;
}

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

	ret = sensor_hub_input_get_attribute_info(hsdev,
				HID_INPUT_REPORT,
				usage_id,
				HID_USAGE_SENSOR_ORIENT_QUATERNION,
				&st->quaternion);
	if (ret)
		return ret;

	dev_rot_adjust_channel_bit_mask(&channels[0],
		st->quaternion.size / 4);

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

	dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n",
				st->quaternion.size);

	st->scale_precision = hid_sensor_format_scale(
				hsdev->usage,
				&st->quaternion,
				&st->scale_pre_decml, &st->scale_post_decml);

	return 0;
}

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

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

	platform_set_drvdata(pdev, indio_dev);

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

	switch (hsdev->usage) {
	case HID_USAGE_SENSOR_DEVICE_ORIENTATION:
		name = "dev_rotation";
		break;
	case HID_USAGE_SENSOR_RELATIVE_ORIENTATION:
		name = "relative_orientation";
		break;
	case HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION:
		name = "geomagnetic_orientation";
		break;
	default:
		return -EINVAL;
	}

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

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

	ret = dev_rot_parse_report(pdev, hsdev,
				   (struct iio_chan_spec *)indio_dev->channels,
					hsdev->usage, rot_state);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup attributes\n");
		return ret;
	}

	indio_dev->num_channels = ARRAY_SIZE(dev_rot_channels);
	indio_dev->info = &dev_rot_info;
	indio_dev->name = name;
	indio_dev->modes = INDIO_DIRECT_MODE;

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

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

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

	rot_state->callbacks.send_event = dev_rot_proc_event;
	rot_state->callbacks.capture_sample = dev_rot_capture_sample;
	rot_state->callbacks.pdev = pdev;
	ret = sensor_hub_register_callback(hsdev, hsdev->usage,
					&rot_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, &rot_state->common_attributes);
	return ret;
}

/* Function to deinitialize the processing for usage id */
static int hid_dev_rot_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 dev_rot_state *rot_state = iio_priv(indio_dev);

	sensor_hub_remove_callback(hsdev, hsdev->usage);
	iio_device_unregister(indio_dev);
	hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);

	return 0;
}

static const struct platform_device_id hid_dev_rot_ids[] = {
	{
		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
		.name = "HID-SENSOR-20008a",
	},
	{
		/* Relative orientation(AG) sensor */
		.name = "HID-SENSOR-20008e",
	},
	{
		/* Geomagnetic orientation(AM) sensor */
		.name = "HID-SENSOR-2000c1",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids);

static struct platform_driver hid_dev_rot_platform_driver = {
	.id_table = hid_dev_rot_ids,
	.driver = {
		.name	= KBUILD_MODNAME,
		.pm     = &hid_sensor_pm_ops,
	},
	.probe		= hid_dev_rot_probe,
	.remove		= hid_dev_rot_remove,
};
module_platform_driver(hid_dev_rot_platform_driver);

MODULE_DESCRIPTION("HID Sensor Device Rotation");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
2025cf9e	1	// SPDX-License-Identifier: GPL-2.0-only
fc18dddc SP	2	/*
	3	* HID Sensors Driver
	4	* Copyright (c) 2014, Intel Corporation.
fc18dddc SP	5	*/
	6
	7	#include <linux/device.h>
	8	#include <linux/platform_device.h>
	9	#include <linux/module.h>
	10	#include <linux/interrupt.h>
	11	#include <linux/irq.h>
	12	#include <linux/slab.h>
	13	#include <linux/hid-sensor-hub.h>
	14	#include <linux/iio/iio.h>
	15	#include <linux/iio/sysfs.h>
	16	#include <linux/iio/buffer.h>
fc18dddc SP	17	#include "../common/hid-sensors/hid-sensor-trigger.h"
	18
	19	struct dev_rot_state {
	20	struct hid_sensor_hub_callbacks callbacks;
	21	struct hid_sensor_common common_attributes;
	22	struct hid_sensor_hub_attribute_info quaternion;
4a3582c8	23	struct {
6c3b6153	24	s32 sampled_vals[4] __aligned(16);
4a3582c8 YX	25	u64 timestamp __aligned(8);
4a3582c8 YX	26	} scan;
a78587d3 SH	27	int scale_pre_decml;
	28	int scale_post_decml;
	29	int scale_precision;
	30	int value_offset;
4a3582c8	31	s64 timestamp;
fc18dddc SP	32	};
fc18dddc SP	33
0e41fd51 YX	34	static const u32 rotation_sensitivity_addresses[] = {
	35	HID_USAGE_SENSOR_DATA_ORIENTATION,
	36	};
	37
fc18dddc SP	38	/* Channel definitions */
	39	static const struct iio_chan_spec dev_rot_channels[] = {
	40	{
	41	.type = IIO_ROT,
	42	.modified = 1,
	43	.channel2 = IIO_MOD_QUATERNION,
	44	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	45	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
a78587d3 SH	46	BIT(IIO_CHAN_INFO_OFFSET) \|
a78587d3 SH	47	BIT(IIO_CHAN_INFO_SCALE) \|
4a3582c8 YX	48	BIT(IIO_CHAN_INFO_HYSTERESIS),
	49	.scan_index = 0
	50	},
	51	IIO_CHAN_SOFT_TIMESTAMP(1)
fc18dddc SP	52	};
	53
	54	/* Adjust channel real bits based on report descriptor */
	55	static void dev_rot_adjust_channel_bit_mask(struct iio_chan_spec *chan,
	56	int size)
	57	{
	58	chan->scan_type.sign = 's';
	59	/* Real storage bits will change based on the report desc. */
	60	chan->scan_type.realbits = size * 8;
	61	/* Maximum size of a sample to capture is u32 */
	62	chan->scan_type.storagebits = sizeof(u32) * 8;
	63	chan->scan_type.repeat = 4;
	64	}
	65
	66	/* Channel read_raw handler */
	67	static int dev_rot_read_raw(struct iio_dev *indio_dev,
	68	struct iio_chan_spec const *chan,
	69	int size, int vals, int val_len,
	70	long mask)
	71	{
	72	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	73	int ret_type;
	74	int i;
	75
	76	vals[0] = 0;
	77	vals[1] = 0;
	78
	79	switch (mask) {
	80	case IIO_CHAN_INFO_RAW:
	81	if (size >= 4) {
	82	for (i = 0; i < 4; ++i)
4a3582c8	83	vals[i] = rot_state->scan.sampled_vals[i];
fc18dddc SP	84	ret_type = IIO_VAL_INT_MULTIPLE;
	85	*val_len = 4;
	86	} else
	87	ret_type = -EINVAL;
	88	break;
a78587d3 SH	89	case IIO_CHAN_INFO_SCALE:
	90	vals[0] = rot_state->scale_pre_decml;
	91	vals[1] = rot_state->scale_post_decml;
	92	return rot_state->scale_precision;
	93
	94	case IIO_CHAN_INFO_OFFSET:
	95	*vals = rot_state->value_offset;
	96	return IIO_VAL_INT;
	97
fc18dddc SP	98	case IIO_CHAN_INFO_SAMP_FREQ:
	99	ret_type = hid_sensor_read_samp_freq_value(
	100	&rot_state->common_attributes, &vals[0], &vals[1]);
	101	break;
	102	case IIO_CHAN_INFO_HYSTERESIS:
	103	ret_type = hid_sensor_read_raw_hyst_value(
	104	&rot_state->common_attributes, &vals[0], &vals[1]);
	105	break;
	106	default:
	107	ret_type = -EINVAL;
	108	break;
	109	}
	110
	111	return ret_type;
	112	}
	113
	114	/* Channel write_raw handler */
	115	static int dev_rot_write_raw(struct iio_dev *indio_dev,
	116	struct iio_chan_spec const *chan,
	117	int val,
	118	int val2,
	119	long mask)
	120	{
	121	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	122	int ret;
	123
	124	switch (mask) {
	125	case IIO_CHAN_INFO_SAMP_FREQ:
	126	ret = hid_sensor_write_samp_freq_value(
	127	&rot_state->common_attributes, val, val2);
	128	break;
	129	case IIO_CHAN_INFO_HYSTERESIS:
	130	ret = hid_sensor_write_raw_hyst_value(
	131	&rot_state->common_attributes, val, val2);
	132	break;
	133	default:
	134	ret = -EINVAL;
	135	}
	136
	137	return ret;
	138	}
	139
	140	static const struct iio_info dev_rot_info = {
fc18dddc SP	141	.read_raw_multi = &dev_rot_read_raw,
	142	.write_raw = &dev_rot_write_raw,
	143	};
	144
fc18dddc SP	145	/* Callback handler to send event after all samples are received and captured */
	146	static int dev_rot_proc_event(struct hid_sensor_hub_device *hsdev,
	147	unsigned usage_id,
	148	void *priv)
	149	{
	150	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	151	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	152
56ff6be6	153	dev_dbg(&indio_dev->dev, "dev_rot_proc_event\n");
4a3582c8 YX	154	if (atomic_read(&rot_state->common_attributes.data_ready)) {
	155	if (!rot_state->timestamp)
	156	rot_state->timestamp = iio_get_time_ns(indio_dev);
	157
	158	iio_push_to_buffers_with_timestamp(indio_dev, &rot_state->scan,
	159	rot_state->timestamp);
	160
	161	rot_state->timestamp = 0;
	162	}
fc18dddc SP	163
	164	return 0;
	165	}
	166
	167	/* Capture samples in local storage */
	168	static int dev_rot_capture_sample(struct hid_sensor_hub_device *hsdev,
	169	unsigned usage_id,
	170	size_t raw_len, char *raw_data,
	171	void *priv)
	172	{
	173	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	174	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	175
	176	if (usage_id == HID_USAGE_SENSOR_ORIENT_QUATERNION) {
6c3b6153 YX	177	if (raw_len / 4 == sizeof(s16)) {
	178	rot_state->scan.sampled_vals[0] = ((s16 *)raw_data)[0];
	179	rot_state->scan.sampled_vals[1] = ((s16 *)raw_data)[1];
	180	rot_state->scan.sampled_vals[2] = ((s16 *)raw_data)[2];
	181	rot_state->scan.sampled_vals[3] = ((s16 *)raw_data)[3];
	182	} else {
	183	memcpy(&rot_state->scan.sampled_vals, raw_data,
	184	sizeof(rot_state->scan.sampled_vals));
	185	}
4a3582c8	186
fc18dddc	187	dev_dbg(&indio_dev->dev, "Recd Quat len:%zu::%zu\n", raw_len,
4a3582c8 YX	188	sizeof(rot_state->scan.sampled_vals));
	189	} else if (usage_id == HID_USAGE_SENSOR_TIME_TIMESTAMP) {
	190	rot_state->timestamp = hid_sensor_convert_timestamp(&rot_state->common_attributes,
	191	(s64 )raw_data);
fc18dddc SP	192	}
	193
	194	return 0;
	195	}
	196
	197	/* Parse report which is specific to an usage id*/
	198	static int dev_rot_parse_report(struct platform_device *pdev,
	199	struct hid_sensor_hub_device *hsdev,
	200	struct iio_chan_spec *channels,
	201	unsigned usage_id,
	202	struct dev_rot_state *st)
	203	{
	204	int ret;
	205
	206	ret = sensor_hub_input_get_attribute_info(hsdev,
	207	HID_INPUT_REPORT,
	208	usage_id,
	209	HID_USAGE_SENSOR_ORIENT_QUATERNION,
	210	&st->quaternion);
	211	if (ret)
	212	return ret;
	213
	214	dev_rot_adjust_channel_bit_mask(&channels[0],
	215	st->quaternion.size / 4);
	216
	217	dev_dbg(&pdev->dev, "dev_rot %x:%x\n", st->quaternion.index,
	218	st->quaternion.report_id);
	219
	220	dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n",
	221	st->quaternion.size);
	222
a78587d3 SH	223	st->scale_precision = hid_sensor_format_scale(
	224	hsdev->usage,
	225	&st->quaternion,
	226	&st->scale_pre_decml, &st->scale_post_decml);
	227
fc18dddc SP	228	return 0;
	229	}
	230
	231	/* Function to initialize the processing for usage id */
	232	static int hid_dev_rot_probe(struct platform_device *pdev)
	233	{
	234	int ret;
50db2cd4	235	char *name;
fc18dddc SP	236	struct iio_dev *indio_dev;
	237	struct dev_rot_state *rot_state;
	238	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
fc18dddc SP	239
	240	indio_dev = devm_iio_device_alloc(&pdev->dev,
	241	sizeof(struct dev_rot_state));
	242	if (indio_dev == NULL)
	243	return -ENOMEM;
	244
	245	platform_set_drvdata(pdev, indio_dev);
	246
	247	rot_state = iio_priv(indio_dev);
	248	rot_state->common_attributes.hsdev = hsdev;
	249	rot_state->common_attributes.pdev = pdev;
	250
9ff88edc SH	251	switch (hsdev->usage) {
	252	case HID_USAGE_SENSOR_DEVICE_ORIENTATION:
	253	name = "dev_rotation";
	254	break;
	255	case HID_USAGE_SENSOR_RELATIVE_ORIENTATION:
	256	name = "relative_orientation";
	257	break;
00907c7a SH	258	case HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION:
	259	name = "geomagnetic_orientation";
	260	break;
9ff88edc SH	261	default:
	262	return -EINVAL;
	263	}
	264
0e41fd51 YX	265	ret = hid_sensor_parse_common_attributes(hsdev,
	266	hsdev->usage,
	267	&rot_state->common_attributes,
	268	rotation_sensitivity_addresses,
	269	ARRAY_SIZE(rotation_sensitivity_addresses));
fc18dddc SP	270	if (ret) {
	271	dev_err(&pdev->dev, "failed to setup common attributes\n");
	272	return ret;
	273	}
	274
2bd04628 FE	275	indio_dev->channels = devm_kmemdup(&pdev->dev, dev_rot_channels,
	276	sizeof(dev_rot_channels),
	277	GFP_KERNEL);
	278	if (!indio_dev->channels) {
fc18dddc SP	279	dev_err(&pdev->dev, "failed to duplicate channels\n");
	280	return -ENOMEM;
	281	}
	282
2bd04628 FE	283	ret = dev_rot_parse_report(pdev, hsdev,
2bd04628 FE	284	(struct iio_chan_spec *)indio_dev->channels,
9ff88edc	285	hsdev->usage, rot_state);
fc18dddc SP	286	if (ret) {
	287	dev_err(&pdev->dev, "failed to setup attributes\n");
	288	return ret;
	289	}
	290
fc18dddc	291	indio_dev->num_channels = ARRAY_SIZE(dev_rot_channels);
fc18dddc SP	292	indio_dev->info = &dev_rot_info;
	293	indio_dev->name = name;
	294	indio_dev->modes = INDIO_DIRECT_MODE;
	295
56ff6be6	296	atomic_set(&rot_state->common_attributes.data_ready, 0);
067fda1c	297
fc18dddc SP	298	ret = hid_sensor_setup_trigger(indio_dev, name,
	299	&rot_state->common_attributes);
	300	if (ret) {
	301	dev_err(&pdev->dev, "trigger setup failed\n");
067fda1c	302	return ret;
fc18dddc SP	303	}
	304
	305	ret = iio_device_register(indio_dev);
	306	if (ret) {
	307	dev_err(&pdev->dev, "device register failed\n");
	308	goto error_remove_trigger;
	309	}
	310
	311	rot_state->callbacks.send_event = dev_rot_proc_event;
	312	rot_state->callbacks.capture_sample = dev_rot_capture_sample;
	313	rot_state->callbacks.pdev = pdev;
9ff88edc	314	ret = sensor_hub_register_callback(hsdev, hsdev->usage,
fc18dddc SP	315	&rot_state->callbacks);
	316	if (ret) {
	317	dev_err(&pdev->dev, "callback reg failed\n");
	318	goto error_iio_unreg;
	319	}
	320
	321	return 0;
	322
	323	error_iio_unreg:
	324	iio_device_unregister(indio_dev);
	325	error_remove_trigger:
067fda1c	326	hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);
fc18dddc SP	327	return ret;
	328	}
	329
	330	/* Function to deinitialize the processing for usage id */
	331	static int hid_dev_rot_remove(struct platform_device *pdev)
	332	{
	333	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	334	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
	335	struct dev_rot_state *rot_state = iio_priv(indio_dev);
	336
9ff88edc	337	sensor_hub_remove_callback(hsdev, hsdev->usage);
fc18dddc	338	iio_device_unregister(indio_dev);
067fda1c	339	hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);
fc18dddc SP	340
	341	return 0;
	342	}
	343
6b490c6c	344	static const struct platform_device_id hid_dev_rot_ids[] = {
fc18dddc SP	345	{
	346	/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
	347	.name = "HID-SENSOR-20008a",
	348	},
9ff88edc SH	349	{
	350	/* Relative orientation(AG) sensor */
	351	.name = "HID-SENSOR-20008e",
	352	},
00907c7a SH	353	{
	354	/* Geomagnetic orientation(AM) sensor */
	355	.name = "HID-SENSOR-2000c1",
	356	},
fc18dddc SP	357	{ /* sentinel */ }
	358	};
	359	MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids);
	360
	361	static struct platform_driver hid_dev_rot_platform_driver = {
	362	.id_table = hid_dev_rot_ids,
	363	.driver = {
	364	.name = KBUILD_MODNAME,
8af644a7	365	.pm = &hid_sensor_pm_ops,
fc18dddc SP	366	},
	367	.probe = hid_dev_rot_probe,
	368	.remove = hid_dev_rot_remove,
	369	};
	370	module_platform_driver(hid_dev_rot_platform_driver);
	371
	372	MODULE_DESCRIPTION("HID Sensor Device Rotation");
	373	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	374	MODULE_LICENSE("GPL");