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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * HID Sensors Driver
 * Copyright (c) 2012, 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 gyro_3d_channel {
	CHANNEL_SCAN_INDEX_X,
	CHANNEL_SCAN_INDEX_Y,
	CHANNEL_SCAN_INDEX_Z,
	GYRO_3D_CHANNEL_MAX,
};

#define CHANNEL_SCAN_INDEX_TIMESTAMP GYRO_3D_CHANNEL_MAX
struct gyro_3d_state {
	struct hid_sensor_hub_callbacks callbacks;
	struct hid_sensor_common common_attributes;
	struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX];
	struct {
		u32 gyro_val[GYRO_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 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = {
	HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS,
	HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS,
	HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS
};

static const u32 gryo_3d_sensitivity_addresses[] = {
	HID_USAGE_SENSOR_DATA_ANGL_VELOCITY,
};

/* Channel definitions */
static const struct iio_chan_spec gyro_3d_channels[] = {
	{
		.type = IIO_ANGL_VEL,
		.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_ANGL_VEL,
		.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_ANGL_VEL,
		.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 gyro_3d_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 gyro_3d_read_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan,
			      int *val, int *val2,
			      long mask)
{
	struct gyro_3d_state *gyro_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(&gyro_state->common_attributes, true);
		report_id = gyro_state->gyro[chan->scan_index].report_id;
		min = gyro_state->gyro[chan->scan_index].logical_minimum;
		address = gyro_3d_addresses[chan->scan_index];
		if (report_id >= 0)
			*val = sensor_hub_input_attr_get_raw_value(
					gyro_state->common_attributes.hsdev,
					HID_USAGE_SENSOR_GYRO_3D, address,
					report_id,
					SENSOR_HUB_SYNC,
					min < 0);
		else {
			*val = 0;
			hid_sensor_power_state(&gyro_state->common_attributes,
						false);
			return -EINVAL;
		}
		hid_sensor_power_state(&gyro_state->common_attributes, false);
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SCALE:
		*val = gyro_state->scale_pre_decml;
		*val2 = gyro_state->scale_post_decml;
		ret_type = gyro_state->scale_precision;
		break;
	case IIO_CHAN_INFO_OFFSET:
		*val = gyro_state->value_offset;
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SAMP_FREQ:
		ret_type = hid_sensor_read_samp_freq_value(
			&gyro_state->common_attributes, val, val2);
		break;
	case IIO_CHAN_INFO_HYSTERESIS:
		ret_type = hid_sensor_read_raw_hyst_value(
			&gyro_state->common_attributes, val, val2);
		break;
	default:
		ret_type = -EINVAL;
		break;
	}

	return ret_type;
}

/* Channel write_raw handler */
static int gyro_3d_write_raw(struct iio_dev *indio_dev,
			       struct iio_chan_spec const *chan,
			       int val,
			       int val2,
			       long mask)
{
	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
	int ret = 0;

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

	return ret;
}

static const struct iio_info gyro_3d_info = {
	.read_raw = &gyro_3d_read_raw,
	.write_raw = &gyro_3d_write_raw,
};

/* Callback handler to send event after all samples are received and captured */
static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev,
				unsigned usage_id,
				void *priv)
{
	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);

	dev_dbg(&indio_dev->dev, "gyro_3d_proc_event\n");
	if (atomic_read(&gyro_state->common_attributes.data_ready)) {
		if (!gyro_state->timestamp)
			gyro_state->timestamp = iio_get_time_ns(indio_dev);

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

		gyro_state->timestamp = 0;
	}

	return 0;
}

/* Capture samples in local storage */
static int gyro_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 gyro_3d_state *gyro_state = iio_priv(indio_dev);
	int offset;
	int ret = -EINVAL;

	switch (usage_id) {
	case HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS:
	case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS:
	case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS:
		offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS;
		gyro_state->scan.gyro_val[CHANNEL_SCAN_INDEX_X + offset] =
				*(u32 *)raw_data;
		ret = 0;
	break;
	case HID_USAGE_SENSOR_TIME_TIMESTAMP:
		gyro_state->timestamp =
			hid_sensor_convert_timestamp(&gyro_state->common_attributes,
						     *(s64 *)raw_data);
		ret = 0;
	break;
	default:
		break;
	}

	return ret;
}

/* Parse report which is specific to an usage id*/
static int gyro_3d_parse_report(struct platform_device *pdev,
				struct hid_sensor_hub_device *hsdev,
				struct iio_chan_spec *channels,
				unsigned usage_id,
				struct gyro_3d_state *st)
{
	int ret;
	int i;

	for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
		ret = sensor_hub_input_get_attribute_info(hsdev,
				HID_INPUT_REPORT,
				usage_id,
				HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS + i,
				&st->gyro[CHANNEL_SCAN_INDEX_X + i]);
		if (ret < 0)
			break;
		gyro_3d_adjust_channel_bit_mask(channels,
				CHANNEL_SCAN_INDEX_X + i,
				st->gyro[CHANNEL_SCAN_INDEX_X + i].size);
	}
	dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n",
			st->gyro[0].index,
			st->gyro[0].report_id,
			st->gyro[1].index, st->gyro[1].report_id,
			st->gyro[2].index, st->gyro[2].report_id);

	st->scale_precision = hid_sensor_format_scale(
				HID_USAGE_SENSOR_GYRO_3D,
				&st->gyro[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_gyro_3d_probe(struct platform_device *pdev)
{
	int ret = 0;
	static const char *name = "gyro_3d";
	struct iio_dev *indio_dev;
	struct gyro_3d_state *gyro_state;
	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;

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

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

	ret = hid_sensor_parse_common_attributes(hsdev,
						HID_USAGE_SENSOR_GYRO_3D,
						&gyro_state->common_attributes,
						gryo_3d_sensitivity_addresses,
						ARRAY_SIZE(gryo_3d_sensitivity_addresses));
	if (ret) {
		dev_err(&pdev->dev, "failed to setup common attributes\n");
		return ret;
	}

	indio_dev->channels = devm_kmemdup(&pdev->dev, gyro_3d_channels,
					   sizeof(gyro_3d_channels), GFP_KERNEL);
	if (!indio_dev->channels) {
		dev_err(&pdev->dev, "failed to duplicate channels\n");
		return -ENOMEM;
	}

	ret = gyro_3d_parse_report(pdev, hsdev,
				   (struct iio_chan_spec *)indio_dev->channels,
				   HID_USAGE_SENSOR_GYRO_3D, gyro_state);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup attributes\n");
		return ret;
	}

	indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels);
	indio_dev->info = &gyro_3d_info;
	indio_dev->name = name;
	indio_dev->modes = INDIO_DIRECT_MODE;

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

	ret = hid_sensor_setup_trigger(indio_dev, name,
					&gyro_state->common_attributes);
	if (ret < 0) {
		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;
	}

	gyro_state->callbacks.send_event = gyro_3d_proc_event;
	gyro_state->callbacks.capture_sample = gyro_3d_capture_sample;
	gyro_state->callbacks.pdev = pdev;
	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D,
					&gyro_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(indio_dev, &gyro_state->common_attributes);
	return ret;
}

/* Function to deinitialize the processing for usage id */
static int hid_gyro_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 gyro_3d_state *gyro_state = iio_priv(indio_dev);

	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
	iio_device_unregister(indio_dev);
	hid_sensor_remove_trigger(indio_dev, &gyro_state->common_attributes);

	return 0;
}

static const struct platform_device_id hid_gyro_3d_ids[] = {
	{
		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
		.name = "HID-SENSOR-200076",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, hid_gyro_3d_ids);

static struct platform_driver hid_gyro_3d_platform_driver = {
	.id_table = hid_gyro_3d_ids,
	.driver = {
		.name	= KBUILD_MODNAME,
		.pm	= &hid_sensor_pm_ops,
	},
	.probe		= hid_gyro_3d_probe,
	.remove		= hid_gyro_3d_remove,
};
module_platform_driver(hid_gyro_3d_platform_driver);

MODULE_DESCRIPTION("HID Sensor Gyroscope 3D");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(IIO_HID);
Commit	Line	Data
a61127c2	1	// SPDX-License-Identifier: GPL-2.0-only
c5bdbef7	2	/*
	3	* HID Sensors Driver
	4	* Copyright (c) 2012, Intel Corporation.
c5bdbef7	5	*/
	6	#include <linux/device.h>
	7	#include <linux/platform_device.h>
	8	#include <linux/module.h>
fb226ae7	9	#include <linux/mod_devicetable.h>
c5bdbef7	10	#include <linux/slab.h>
	11	#include <linux/hid-sensor-hub.h>
	12	#include <linux/iio/iio.h>
c5bdbef7	13	#include <linux/iio/buffer.h>
c5bdbef7	14	#include "../common/hid-sensors/hid-sensor-trigger.h"
c5bdbef7	15
c5bdbef7	16	enum gyro_3d_channel {
	17	CHANNEL_SCAN_INDEX_X,
	18	CHANNEL_SCAN_INDEX_Y,
	19	CHANNEL_SCAN_INDEX_Z,
	20	GYRO_3D_CHANNEL_MAX,
	21	};
	22
4648cbd8	23	#define CHANNEL_SCAN_INDEX_TIMESTAMP GYRO_3D_CHANNEL_MAX
c5bdbef7	24	struct gyro_3d_state {
c5bdbef7	25	struct hid_sensor_hub_callbacks callbacks;
e07c6d17	26	struct hid_sensor_common common_attributes;
c5bdbef7	27	struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX];
4648cbd8 YX	28	struct {
	29	u32 gyro_val[GYRO_3D_CHANNEL_MAX];
	30	u64 timestamp __aligned(8);
	31	} scan;
6c7db77e SP	32	int scale_pre_decml;
	33	int scale_post_decml;
	34	int scale_precision;
	35	int value_offset;
4648cbd8	36	s64 timestamp;
c5bdbef7	37	};
	38
	39	static const u32 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = {
	40	HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS,
	41	HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS,
	42	HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS
	43	};
	44
0e41fd51 YX	45	static const u32 gryo_3d_sensitivity_addresses[] = {
	46	HID_USAGE_SENSOR_DATA_ANGL_VELOCITY,
	47	};
	48
c5bdbef7	49	/* Channel definitions */
	50	static const struct iio_chan_spec gyro_3d_channels[] = {
	51	{
	52	.type = IIO_ANGL_VEL,
	53	.modified = 1,
	54	.channel2 = IIO_MOD_X,
0964f706	55	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
ecbe18f2 JC	56	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	57	BIT(IIO_CHAN_INFO_SCALE) \|
	58	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	59	BIT(IIO_CHAN_INFO_HYSTERESIS),
c5bdbef7	60	.scan_index = CHANNEL_SCAN_INDEX_X,
	61	}, {
	62	.type = IIO_ANGL_VEL,
	63	.modified = 1,
	64	.channel2 = IIO_MOD_Y,
0964f706	65	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
ecbe18f2 JC	66	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	67	BIT(IIO_CHAN_INFO_SCALE) \|
	68	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	69	BIT(IIO_CHAN_INFO_HYSTERESIS),
c5bdbef7	70	.scan_index = CHANNEL_SCAN_INDEX_Y,
	71	}, {
	72	.type = IIO_ANGL_VEL,
	73	.modified = 1,
	74	.channel2 = IIO_MOD_Z,
0964f706	75	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
ecbe18f2 JC	76	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	77	BIT(IIO_CHAN_INFO_SCALE) \|
	78	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	79	BIT(IIO_CHAN_INFO_HYSTERESIS),
c5bdbef7	80	.scan_index = CHANNEL_SCAN_INDEX_Z,
4648cbd8 YX	81	},
4648cbd8 YX	82	IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
c5bdbef7	83	};
	84
	85	/* Adjust channel real bits based on report descriptor */
	86	static void gyro_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
	87	int channel, int size)
	88	{
	89	channels[channel].scan_type.sign = 's';
	90	/* Real storage bits will change based on the report desc. */
	91	channels[channel].scan_type.realbits = size * 8;
	92	/* Maximum size of a sample to capture is u32 */
	93	channels[channel].scan_type.storagebits = sizeof(u32) * 8;
	94	}
	95
	96	/* Channel read_raw handler */
	97	static int gyro_3d_read_raw(struct iio_dev *indio_dev,
	98	struct iio_chan_spec const *chan,
	99	int val, int val2,
	100	long mask)
	101	{
	102	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
	103	int report_id = -1;
	104	u32 address;
c5bdbef7	105	int ret_type;
0145b505	106	s32 min;
c5bdbef7	107
	108	*val = 0;
	109	*val2 = 0;
	110	switch (mask) {
67464a54	111	case IIO_CHAN_INFO_RAW:
0964f706	112	hid_sensor_power_state(&gyro_state->common_attributes, true);
c5bdbef7	113	report_id = gyro_state->gyro[chan->scan_index].report_id;
0145b505	114	min = gyro_state->gyro[chan->scan_index].logical_minimum;
c5bdbef7	115	address = gyro_3d_addresses[chan->scan_index];
	116	if (report_id >= 0)
	117	*val = sensor_hub_input_attr_get_raw_value(
0964f706 SP	118	gyro_state->common_attributes.hsdev,
0964f706 SP	119	HID_USAGE_SENSOR_GYRO_3D, address,
b3f4737d	120	report_id,
0145b505 HG	121	SENSOR_HUB_SYNC,
0145b505 HG	122	min < 0);
c5bdbef7	123	else {
c5bdbef7	124	*val = 0;
0964f706 SP	125	hid_sensor_power_state(&gyro_state->common_attributes,
0964f706 SP	126	false);
c5bdbef7	127	return -EINVAL;
c5bdbef7	128	}
0964f706	129	hid_sensor_power_state(&gyro_state->common_attributes, false);
c5bdbef7	130	ret_type = IIO_VAL_INT;
	131	break;
	132	case IIO_CHAN_INFO_SCALE:
6c7db77e SP	133	*val = gyro_state->scale_pre_decml;
	134	*val2 = gyro_state->scale_post_decml;
	135	ret_type = gyro_state->scale_precision;
c5bdbef7	136	break;
c5bdbef7	137	case IIO_CHAN_INFO_OFFSET:
6c7db77e	138	*val = gyro_state->value_offset;
c5bdbef7	139	ret_type = IIO_VAL_INT;
	140	break;
	141	case IIO_CHAN_INFO_SAMP_FREQ:
27793803	142	ret_type = hid_sensor_read_samp_freq_value(
c5bdbef7	143	&gyro_state->common_attributes, val, val2);
c5bdbef7	144	break;
c5bdbef7	145	case IIO_CHAN_INFO_HYSTERESIS:
27793803	146	ret_type = hid_sensor_read_raw_hyst_value(
c5bdbef7	147	&gyro_state->common_attributes, val, val2);
c5bdbef7	148	break;
	149	default:
	150	ret_type = -EINVAL;
	151	break;
	152	}
	153
	154	return ret_type;
	155	}
	156
	157	/* Channel write_raw handler */
	158	static int gyro_3d_write_raw(struct iio_dev *indio_dev,
	159	struct iio_chan_spec const *chan,
	160	int val,
	161	int val2,
	162	long mask)
	163	{
	164	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
	165	int ret = 0;
	166
	167	switch (mask) {
	168	case IIO_CHAN_INFO_SAMP_FREQ:
	169	ret = hid_sensor_write_samp_freq_value(
	170	&gyro_state->common_attributes, val, val2);
	171	break;
	172	case IIO_CHAN_INFO_HYSTERESIS:
	173	ret = hid_sensor_write_raw_hyst_value(
	174	&gyro_state->common_attributes, val, val2);
	175	break;
	176	default:
	177	ret = -EINVAL;
	178	}
	179
	180	return ret;
	181	}
	182
c5bdbef7	183	static const struct iio_info gyro_3d_info = {
c5bdbef7	184	.read_raw = &gyro_3d_read_raw,
c5bdbef7	185	.write_raw = &gyro_3d_write_raw,
c5bdbef7	186	};
c5bdbef7	187
c5bdbef7	188	/* Callback handler to send event after all samples are received and captured */
	189	static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev,
	190	unsigned usage_id,
	191	void *priv)
	192	{
	193	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	194	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
	195
56ff6be6	196	dev_dbg(&indio_dev->dev, "gyro_3d_proc_event\n");
4648cbd8 YX	197	if (atomic_read(&gyro_state->common_attributes.data_ready)) {
	198	if (!gyro_state->timestamp)
	199	gyro_state->timestamp = iio_get_time_ns(indio_dev);
	200
	201	iio_push_to_buffers_with_timestamp(indio_dev, &gyro_state->scan,
	202	gyro_state->timestamp);
	203
	204	gyro_state->timestamp = 0;
	205	}
c5bdbef7	206
	207	return 0;
	208	}
	209
	210	/* Capture samples in local storage */
	211	static int gyro_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
	212	unsigned usage_id,
	213	size_t raw_len, char *raw_data,
	214	void *priv)
	215	{
	216	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	217	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
	218	int offset;
	219	int ret = -EINVAL;
	220
	221	switch (usage_id) {
	222	case HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS:
	223	case HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS:
	224	case HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS:
	225	offset = usage_id - HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS;
4648cbd8 YX	226	gyro_state->scan.gyro_val[CHANNEL_SCAN_INDEX_X + offset] =
4648cbd8 YX	227	(u32 )raw_data;
c5bdbef7	228	ret = 0;
c5bdbef7	229	break;
4648cbd8 YX	230	case HID_USAGE_SENSOR_TIME_TIMESTAMP:
	231	gyro_state->timestamp =
	232	hid_sensor_convert_timestamp(&gyro_state->common_attributes,
	233	(s64 )raw_data);
eb50cd5b	234	ret = 0;
4648cbd8	235	break;
c5bdbef7	236	default:
	237	break;
	238	}
	239
	240	return ret;
	241	}
	242
	243	/* Parse report which is specific to an usage id*/
	244	static int gyro_3d_parse_report(struct platform_device *pdev,
	245	struct hid_sensor_hub_device *hsdev,
	246	struct iio_chan_spec *channels,
	247	unsigned usage_id,
	248	struct gyro_3d_state *st)
	249	{
	250	int ret;
	251	int i;
	252
	253	for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
	254	ret = sensor_hub_input_get_attribute_info(hsdev,
	255	HID_INPUT_REPORT,
	256	usage_id,
	257	HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS + i,
	258	&st->gyro[CHANNEL_SCAN_INDEX_X + i]);
	259	if (ret < 0)
	260	break;
	261	gyro_3d_adjust_channel_bit_mask(channels,
	262	CHANNEL_SCAN_INDEX_X + i,
	263	st->gyro[CHANNEL_SCAN_INDEX_X + i].size);
	264	}
	265	dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n",
	266	st->gyro[0].index,
	267	st->gyro[0].report_id,
	268	st->gyro[1].index, st->gyro[1].report_id,
	269	st->gyro[2].index, st->gyro[2].report_id);
	270
6c7db77e SP	271	st->scale_precision = hid_sensor_format_scale(
	272	HID_USAGE_SENSOR_GYRO_3D,
	273	&st->gyro[CHANNEL_SCAN_INDEX_X],
	274	&st->scale_pre_decml, &st->scale_post_decml);
	275
c5bdbef7	276	return ret;
	277	}
	278
	279	/* Function to initialize the processing for usage id */
fc52692c	280	static int hid_gyro_3d_probe(struct platform_device *pdev)
c5bdbef7	281	{
	282	int ret = 0;
	283	static const char *name = "gyro_3d";
	284	struct iio_dev *indio_dev;
	285	struct gyro_3d_state *gyro_state;
	286	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
c5bdbef7	287
1ba15cf2 SK	288	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*gyro_state));
	289	if (!indio_dev)
	290	return -ENOMEM;
c5bdbef7	291	platform_set_drvdata(pdev, indio_dev);
	292
	293	gyro_state = iio_priv(indio_dev);
	294	gyro_state->common_attributes.hsdev = hsdev;
	295	gyro_state->common_attributes.pdev = pdev;
	296
	297	ret = hid_sensor_parse_common_attributes(hsdev,
	298	HID_USAGE_SENSOR_GYRO_3D,
0e41fd51 YX	299	&gyro_state->common_attributes,
	300	gryo_3d_sensitivity_addresses,
	301	ARRAY_SIZE(gryo_3d_sensitivity_addresses));
c5bdbef7	302	if (ret) {
c5bdbef7	303	dev_err(&pdev->dev, "failed to setup common attributes\n");
1ba15cf2	304	return ret;
c5bdbef7	305	}
c5bdbef7	306
8b2ac516 AA	307	indio_dev->channels = devm_kmemdup(&pdev->dev, gyro_3d_channels,
8b2ac516 AA	308	sizeof(gyro_3d_channels), GFP_KERNEL);
d8c9d23e	309	if (!indio_dev->channels) {
c5bdbef7	310	dev_err(&pdev->dev, "failed to duplicate channels\n");
1ba15cf2	311	return -ENOMEM;
c5bdbef7	312	}
c5bdbef7	313
d8c9d23e FE	314	ret = gyro_3d_parse_report(pdev, hsdev,
	315	(struct iio_chan_spec *)indio_dev->channels,
	316	HID_USAGE_SENSOR_GYRO_3D, gyro_state);
c5bdbef7	317	if (ret) {
c5bdbef7	318	dev_err(&pdev->dev, "failed to setup attributes\n");
8b2ac516	319	return ret;
c5bdbef7	320	}
c5bdbef7	321
c5bdbef7	322	indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels);
c5bdbef7	323	indio_dev->info = &gyro_3d_info;
	324	indio_dev->name = name;
	325	indio_dev->modes = INDIO_DIRECT_MODE;
	326
56ff6be6	327	atomic_set(&gyro_state->common_attributes.data_ready, 0);
067fda1c	328
c5bdbef7	329	ret = hid_sensor_setup_trigger(indio_dev, name,
	330	&gyro_state->common_attributes);
	331	if (ret < 0) {
	332	dev_err(&pdev->dev, "trigger setup failed\n");
8b2ac516	333	return ret;
c5bdbef7	334	}
	335
	336	ret = iio_device_register(indio_dev);
	337	if (ret) {
	338	dev_err(&pdev->dev, "device register failed\n");
	339	goto error_remove_trigger;
	340	}
	341
	342	gyro_state->callbacks.send_event = gyro_3d_proc_event;
	343	gyro_state->callbacks.capture_sample = gyro_3d_capture_sample;
	344	gyro_state->callbacks.pdev = pdev;
	345	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D,
	346	&gyro_state->callbacks);
	347	if (ret < 0) {
	348	dev_err(&pdev->dev, "callback reg failed\n");
	349	goto error_iio_unreg;
	350	}
	351
	352	return ret;
	353
	354	error_iio_unreg:
	355	iio_device_unregister(indio_dev);
	356	error_remove_trigger:
067fda1c	357	hid_sensor_remove_trigger(indio_dev, &gyro_state->common_attributes);
c5bdbef7	358	return ret;
	359	}
	360
	361	/* Function to deinitialize the processing for usage id */
fc52692c	362	static int hid_gyro_3d_remove(struct platform_device *pdev)
c5bdbef7	363	{
	364	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	365	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
ec7f68e0	366	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
c5bdbef7	367
	368	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
	369	iio_device_unregister(indio_dev);
067fda1c	370	hid_sensor_remove_trigger(indio_dev, &gyro_state->common_attributes);
c5bdbef7	371
	372	return 0;
	373	}
	374
322a3b1e	375	static const struct platform_device_id hid_gyro_3d_ids[] = {
a411e735 AH	376	{
	377	/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
	378	.name = "HID-SENSOR-200076",
	379	},
	380	{ /* sentinel */ }
	381	};
	382	MODULE_DEVICE_TABLE(platform, hid_gyro_3d_ids);
	383
c5bdbef7	384	static struct platform_driver hid_gyro_3d_platform_driver = {
a411e735	385	.id_table = hid_gyro_3d_ids,
c5bdbef7	386	.driver = {
a411e735	387	.name = KBUILD_MODNAME,
27ce4239	388	.pm = &hid_sensor_pm_ops,
c5bdbef7	389	},
	390	.probe = hid_gyro_3d_probe,
	391	.remove = hid_gyro_3d_remove,
	392	};
	393	module_platform_driver(hid_gyro_3d_platform_driver);
	394
	395	MODULE_DESCRIPTION("HID Sensor Gyroscope 3D");
	396	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
	397	MODULE_LICENSE("GPL");
12f13d1f	398	MODULE_IMPORT_NS(IIO_HID);