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

/*
 * HID Sensors Driver
 * Copyright (c) 2012, 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; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */
#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"

enum gyro_3d_channel {
	CHANNEL_SCAN_INDEX_X,
	CHANNEL_SCAN_INDEX_Y,
	CHANNEL_SCAN_INDEX_Z,
	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];
	u32 gyro_val[GYRO_3D_CHANNEL_MAX];
};

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
};

/* Channel definitions */
static const struct iio_chan_spec gyro_3d_channels[] = {
	{
		.type = IIO_ANGL_VEL,
		.modified = 1,
		.channel2 = IIO_MOD_X,
		.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_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_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,
	}
};

/* 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;
	int ret_type;

	*val = 0;
	*val2 = 0;
	switch (mask) {
	case 0:
		report_id = gyro_state->gyro[chan->scan_index].report_id;
		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);
		else {
			*val = 0;
			return -EINVAL;
		}
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SCALE:
		*val = gyro_state->gyro[CHANNEL_SCAN_INDEX_X].units;
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_OFFSET:
		*val = hid_sensor_convert_exponent(
			gyro_state->gyro[CHANNEL_SCAN_INDEX_X].unit_expo);
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SAMP_FREQ:
		ret = hid_sensor_read_samp_freq_value(
			&gyro_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(
			&gyro_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 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 = {
	.driver_module = THIS_MODULE,
	.read_raw = &gyro_3d_read_raw,
	.write_raw = &gyro_3d_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 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 [%d]\n",
				gyro_state->common_attributes.data_ready);
	if (gyro_state->common_attributes.data_ready)
		hid_sensor_push_data(indio_dev,
				gyro_state->gyro_val,
				sizeof(gyro_state->gyro_val));

	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->gyro_val[CHANNEL_SCAN_INDEX_X + offset] =
						*(u32 *)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);

	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;
	struct iio_chan_spec *channels;

	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);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup common attributes\n");
		return ret;
	}

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

	ret = gyro_3d_parse_report(pdev, hsdev, channels,
					HID_USAGE_SENSOR_GYRO_3D, gyro_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(gyro_3d_channels);
	indio_dev->dev.parent = &pdev->dev;
	indio_dev->info = &gyro_3d_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;
	}
	gyro_state->common_attributes.data_ready = false;
	ret = hid_sensor_setup_trigger(indio_dev, name,
					&gyro_state->common_attributes);
	if (ret < 0) {
		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;
	}

	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(&gyro_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_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(&gyro_state->common_attributes);
	iio_triggered_buffer_cleanup(indio_dev);
	kfree(indio_dev->channels);

	return 0;
}

static 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,
		.owner	= THIS_MODULE,
	},
	.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");
Commit	Line	Data
c5bdbef7	1	/*
	2	* HID Sensors Driver
	3	* Copyright (c) 2012, Intel Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	17	*
	18	*/
	19	#include <linux/device.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/module.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/irq.h>
	24	#include <linux/slab.h>
	25	#include <linux/hid-sensor-hub.h>
	26	#include <linux/iio/iio.h>
	27	#include <linux/iio/sysfs.h>
	28	#include <linux/iio/buffer.h>
	29	#include <linux/iio/trigger_consumer.h>
	30	#include <linux/iio/triggered_buffer.h>
c5bdbef7	31	#include "../common/hid-sensors/hid-sensor-trigger.h"
c5bdbef7	32
c5bdbef7	33	enum gyro_3d_channel {
	34	CHANNEL_SCAN_INDEX_X,
	35	CHANNEL_SCAN_INDEX_Y,
	36	CHANNEL_SCAN_INDEX_Z,
	37	GYRO_3D_CHANNEL_MAX,
	38	};
	39
	40	struct gyro_3d_state {
	41	struct hid_sensor_hub_callbacks callbacks;
e07c6d17	42	struct hid_sensor_common common_attributes;
c5bdbef7	43	struct hid_sensor_hub_attribute_info gyro[GYRO_3D_CHANNEL_MAX];
	44	u32 gyro_val[GYRO_3D_CHANNEL_MAX];
	45	};
	46
	47	static const u32 gyro_3d_addresses[GYRO_3D_CHANNEL_MAX] = {
	48	HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS,
	49	HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS,
	50	HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS
	51	};
	52
	53	/* Channel definitions */
	54	static const struct iio_chan_spec gyro_3d_channels[] = {
	55	{
	56	.type = IIO_ANGL_VEL,
	57	.modified = 1,
	58	.channel2 = IIO_MOD_X,
ecbe18f2 JC	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),
c5bdbef7	63	.scan_index = CHANNEL_SCAN_INDEX_X,
	64	}, {
	65	.type = IIO_ANGL_VEL,
	66	.modified = 1,
	67	.channel2 = IIO_MOD_Y,
ecbe18f2 JC	68	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	69	BIT(IIO_CHAN_INFO_SCALE) \|
	70	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	71	BIT(IIO_CHAN_INFO_HYSTERESIS),
c5bdbef7	72	.scan_index = CHANNEL_SCAN_INDEX_Y,
	73	}, {
	74	.type = IIO_ANGL_VEL,
	75	.modified = 1,
	76	.channel2 = IIO_MOD_Z,
ecbe18f2 JC	77	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	78	BIT(IIO_CHAN_INFO_SCALE) \|
	79	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	80	BIT(IIO_CHAN_INFO_HYSTERESIS),
c5bdbef7	81	.scan_index = CHANNEL_SCAN_INDEX_Z,
	82	}
	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;
	105	int ret;
	106	int ret_type;
	107
	108	*val = 0;
	109	*val2 = 0;
	110	switch (mask) {
	111	case 0:
	112	report_id = gyro_state->gyro[chan->scan_index].report_id;
	113	address = gyro_3d_addresses[chan->scan_index];
	114	if (report_id >= 0)
	115	*val = sensor_hub_input_attr_get_raw_value(
	116	gyro_state->common_attributes.hsdev,
	117	HID_USAGE_SENSOR_GYRO_3D, address,
	118	report_id);
	119	else {
	120	*val = 0;
	121	return -EINVAL;
	122	}
	123	ret_type = IIO_VAL_INT;
	124	break;
	125	case IIO_CHAN_INFO_SCALE:
	126	*val = gyro_state->gyro[CHANNEL_SCAN_INDEX_X].units;
	127	ret_type = IIO_VAL_INT;
	128	break;
	129	case IIO_CHAN_INFO_OFFSET:
	130	*val = hid_sensor_convert_exponent(
	131	gyro_state->gyro[CHANNEL_SCAN_INDEX_X].unit_expo);
	132	ret_type = IIO_VAL_INT;
	133	break;
	134	case IIO_CHAN_INFO_SAMP_FREQ:
	135	ret = hid_sensor_read_samp_freq_value(
	136	&gyro_state->common_attributes, val, val2);
	137	ret_type = IIO_VAL_INT_PLUS_MICRO;
	138	break;
	139	case IIO_CHAN_INFO_HYSTERESIS:
	140	ret = hid_sensor_read_raw_hyst_value(
	141	&gyro_state->common_attributes, val, val2);
	142	ret_type = IIO_VAL_INT_PLUS_MICRO;
	143	break;
	144	default:
145	ret_type = -EINVAL;
146	break;
147	}
148
149	return ret_type;
150	}
151
152	/* Channel write_raw handler */
153	static int gyro_3d_write_raw(struct iio_dev *indio_dev,
154	struct iio_chan_spec const *chan,
155	int val,
156	int val2,
157	long mask)
158	{
159	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
160	int ret = 0;
161
162	switch (mask) {
163	case IIO_CHAN_INFO_SAMP_FREQ:
164	ret = hid_sensor_write_samp_freq_value(
165	&gyro_state->common_attributes, val, val2);
166	break;
167	case IIO_CHAN_INFO_HYSTERESIS:
168	ret = hid_sensor_write_raw_hyst_value(
169	&gyro_state->common_attributes, val, val2);
170	break;
171	default:
172	ret = -EINVAL;
173	}
174
175	return ret;
176	}
177
c5bdbef7	178	static const struct iio_info gyro_3d_info = {
	179	.driver_module = THIS_MODULE,
	180	.read_raw = &gyro_3d_read_raw,
	181	.write_raw = &gyro_3d_write_raw,
c5bdbef7	182	};
	183
	184	/* Function to push data to buffer */
8c60c7e7 LPC	185	static void hid_sensor_push_data(struct iio_dev indio_dev, const void data,
8c60c7e7 LPC	186	int len)
c5bdbef7	187	{
c5bdbef7	188	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
8c60c7e7	189	iio_push_to_buffers(indio_dev, data);
c5bdbef7	190	}
	191
	192	/* Callback handler to send event after all samples are received and captured */
	193	static int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev,
	194	unsigned usage_id,
	195	void *priv)
	196	{
	197	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	198	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
	199
	200	dev_dbg(&indio_dev->dev, "gyro_3d_proc_event [%d]\n",
	201	gyro_state->common_attributes.data_ready);
	202	if (gyro_state->common_attributes.data_ready)
	203	hid_sensor_push_data(indio_dev,
8c60c7e7	204	gyro_state->gyro_val,
c5bdbef7	205	sizeof(gyro_state->gyro_val));
	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;
	226	gyro_state->gyro_val[CHANNEL_SCAN_INDEX_X + offset] =
	227	(u32 )raw_data;
	228	ret = 0;
	229	break;
	230	default:
	231	break;
	232	}
	233
	234	return ret;
	235	}
	236
	237	/* Parse report which is specific to an usage id*/
	238	static int gyro_3d_parse_report(struct platform_device *pdev,
	239	struct hid_sensor_hub_device *hsdev,
	240	struct iio_chan_spec *channels,
	241	unsigned usage_id,
	242	struct gyro_3d_state *st)
	243	{
	244	int ret;
	245	int i;
	246
	247	for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
	248	ret = sensor_hub_input_get_attribute_info(hsdev,
	249	HID_INPUT_REPORT,
	250	usage_id,
	251	HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS + i,
	252	&st->gyro[CHANNEL_SCAN_INDEX_X + i]);
	253	if (ret < 0)
	254	break;
	255	gyro_3d_adjust_channel_bit_mask(channels,
	256	CHANNEL_SCAN_INDEX_X + i,
	257	st->gyro[CHANNEL_SCAN_INDEX_X + i].size);
	258	}
	259	dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n",
	260	st->gyro[0].index,
	261	st->gyro[0].report_id,
	262	st->gyro[1].index, st->gyro[1].report_id,
	263	st->gyro[2].index, st->gyro[2].report_id);
	264
	265	return ret;
	266	}
	267
	268	/* Function to initialize the processing for usage id */
fc52692c	269	static int hid_gyro_3d_probe(struct platform_device *pdev)
c5bdbef7	270	{
	271	int ret = 0;
	272	static const char *name = "gyro_3d";
	273	struct iio_dev *indio_dev;
	274	struct gyro_3d_state *gyro_state;
	275	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	276	struct iio_chan_spec *channels;
	277
1ba15cf2 SK	278	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*gyro_state));
	279	if (!indio_dev)
	280	return -ENOMEM;
c5bdbef7	281	platform_set_drvdata(pdev, indio_dev);
	282
	283	gyro_state = iio_priv(indio_dev);
	284	gyro_state->common_attributes.hsdev = hsdev;
	285	gyro_state->common_attributes.pdev = pdev;
	286
	287	ret = hid_sensor_parse_common_attributes(hsdev,
	288	HID_USAGE_SENSOR_GYRO_3D,
	289	&gyro_state->common_attributes);
	290	if (ret) {
	291	dev_err(&pdev->dev, "failed to setup common attributes\n");
1ba15cf2	292	return ret;
c5bdbef7	293	}
c5bdbef7	294
64ebe955 AL	295	channels = kmemdup(gyro_3d_channels, sizeof(gyro_3d_channels),
64ebe955 AL	296	GFP_KERNEL);
c5bdbef7	297	if (!channels) {
c5bdbef7	298	dev_err(&pdev->dev, "failed to duplicate channels\n");
1ba15cf2	299	return -ENOMEM;
c5bdbef7	300	}
	301
	302	ret = gyro_3d_parse_report(pdev, hsdev, channels,
	303	HID_USAGE_SENSOR_GYRO_3D, gyro_state);
	304	if (ret) {
	305	dev_err(&pdev->dev, "failed to setup attributes\n");
	306	goto error_free_dev_mem;
	307	}
	308
	309	indio_dev->channels = channels;
	310	indio_dev->num_channels = ARRAY_SIZE(gyro_3d_channels);
	311	indio_dev->dev.parent = &pdev->dev;
	312	indio_dev->info = &gyro_3d_info;
	313	indio_dev->name = name;
	314	indio_dev->modes = INDIO_DIRECT_MODE;
	315
	316	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
	317	NULL, NULL);
	318	if (ret) {
	319	dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
	320	goto error_free_dev_mem;
	321	}
	322	gyro_state->common_attributes.data_ready = false;
	323	ret = hid_sensor_setup_trigger(indio_dev, name,
	324	&gyro_state->common_attributes);
	325	if (ret < 0) {
	326	dev_err(&pdev->dev, "trigger setup failed\n");
	327	goto error_unreg_buffer_funcs;
	328	}
	329
	330	ret = iio_device_register(indio_dev);
	331	if (ret) {
	332	dev_err(&pdev->dev, "device register failed\n");
	333	goto error_remove_trigger;
	334	}
	335
	336	gyro_state->callbacks.send_event = gyro_3d_proc_event;
	337	gyro_state->callbacks.capture_sample = gyro_3d_capture_sample;
	338	gyro_state->callbacks.pdev = pdev;
	339	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D,
	340	&gyro_state->callbacks);
	341	if (ret < 0) {
	342	dev_err(&pdev->dev, "callback reg failed\n");
	343	goto error_iio_unreg;
	344	}
	345
	346	return ret;
	347
	348	error_iio_unreg:
	349	iio_device_unregister(indio_dev);
	350	error_remove_trigger:
ec7f68e0	351	hid_sensor_remove_trigger(&gyro_state->common_attributes);
c5bdbef7	352	error_unreg_buffer_funcs:
	353	iio_triggered_buffer_cleanup(indio_dev);
	354	error_free_dev_mem:
	355	kfree(indio_dev->channels);
c5bdbef7	356	return ret;
	357	}
	358
	359	/* Function to deinitialize the processing for usage id */
fc52692c	360	static int hid_gyro_3d_remove(struct platform_device *pdev)
c5bdbef7	361	{
	362	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	363	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
ec7f68e0	364	struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
c5bdbef7	365
	366	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
	367	iio_device_unregister(indio_dev);
ec7f68e0	368	hid_sensor_remove_trigger(&gyro_state->common_attributes);
c5bdbef7	369	iio_triggered_buffer_cleanup(indio_dev);
c5bdbef7	370	kfree(indio_dev->channels);
c5bdbef7	371
	372	return 0;
	373	}
	374
a411e735 AH	375	static struct platform_device_id hid_gyro_3d_ids[] = {
	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,
c5bdbef7	388	.owner = THIS_MODULE,
	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");