[linux-2.6-block.git] / drivers / iio / accel / hid-sensor-accel-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/delay.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 accel_3d_channel {
	CHANNEL_SCAN_INDEX_X,
	CHANNEL_SCAN_INDEX_Y,
	CHANNEL_SCAN_INDEX_Z,
	ACCEL_3D_CHANNEL_MAX,
};

struct accel_3d_state {
	struct hid_sensor_hub_callbacks callbacks;
	struct hid_sensor_common common_attributes;
	struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX];
	u32 accel_val[ACCEL_3D_CHANNEL_MAX];
	int scale_pre_decml;
	int scale_post_decml;
	int scale_precision;
	int value_offset;
};

static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = {
	HID_USAGE_SENSOR_ACCEL_X_AXIS,
	HID_USAGE_SENSOR_ACCEL_Y_AXIS,
	HID_USAGE_SENSOR_ACCEL_Z_AXIS
};

/* Channel definitions */
static const struct iio_chan_spec accel_3d_channels[] = {
	{
		.type = IIO_ACCEL,
		.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_ACCEL,
		.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_ACCEL,
		.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,
	}
};

/* Adjust channel real bits based on report descriptor */
static void accel_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 accel_3d_read_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan,
			      int *val, int *val2,
			      long mask)
{
	struct accel_3d_state *accel_state = iio_priv(indio_dev);
	int report_id = -1;
	u32 address;
	int ret_type;

	*val = 0;
	*val2 = 0;
	switch (mask) {
	case 0:
		hid_sensor_power_state(&accel_state->common_attributes, true);
		report_id = accel_state->accel[chan->scan_index].report_id;
		address = accel_3d_addresses[chan->scan_index];
		if (report_id >= 0)
			*val = sensor_hub_input_attr_get_raw_value(
					accel_state->common_attributes.hsdev,
					HID_USAGE_SENSOR_ACCEL_3D, address,
					report_id,
					SENSOR_HUB_SYNC);
		else {
			*val = 0;
			hid_sensor_power_state(&accel_state->common_attributes,
						 false);
			return -EINVAL;
		}
		hid_sensor_power_state(&accel_state->common_attributes, false);
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SCALE:
		*val = accel_state->scale_pre_decml;
		*val2 = accel_state->scale_post_decml;
		ret_type = accel_state->scale_precision;
		break;
	case IIO_CHAN_INFO_OFFSET:
		*val = accel_state->value_offset;
		ret_type = IIO_VAL_INT;
		break;
	case IIO_CHAN_INFO_SAMP_FREQ:
		ret_type = hid_sensor_read_samp_freq_value(
			&accel_state->common_attributes, val, val2);
		break;
	case IIO_CHAN_INFO_HYSTERESIS:
		ret_type = hid_sensor_read_raw_hyst_value(
			&accel_state->common_attributes, val, val2);
		break;
	default:
		ret_type = -EINVAL;
		break;
	}

	return ret_type;
}

/* Channel write_raw handler */
static int accel_3d_write_raw(struct iio_dev *indio_dev,
			       struct iio_chan_spec const *chan,
			       int val,
			       int val2,
			       long mask)
{
	struct accel_3d_state *accel_state = iio_priv(indio_dev);
	int ret = 0;

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

	return ret;
}

static const struct iio_info accel_3d_info = {
	.driver_module = THIS_MODULE,
	.read_raw = &accel_3d_read_raw,
	.write_raw = &accel_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 accel_3d_proc_event(struct hid_sensor_hub_device *hsdev,
				unsigned usage_id,
				void *priv)
{
	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	struct accel_3d_state *accel_state = iio_priv(indio_dev);

	dev_dbg(&indio_dev->dev, "accel_3d_proc_event\n");
	if (atomic_read(&accel_state->common_attributes.data_ready))
		hid_sensor_push_data(indio_dev,
				accel_state->accel_val,
				sizeof(accel_state->accel_val));

	return 0;
}

/* Capture samples in local storage */
static int accel_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 accel_3d_state *accel_state = iio_priv(indio_dev);
	int offset;
	int ret = -EINVAL;

	switch (usage_id) {
	case HID_USAGE_SENSOR_ACCEL_X_AXIS:
	case HID_USAGE_SENSOR_ACCEL_Y_AXIS:
	case HID_USAGE_SENSOR_ACCEL_Z_AXIS:
		offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS;
		accel_state->accel_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 accel_3d_parse_report(struct platform_device *pdev,
				struct hid_sensor_hub_device *hsdev,
				struct iio_chan_spec *channels,
				unsigned usage_id,
				struct accel_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_ACCEL_X_AXIS + i,
				&st->accel[CHANNEL_SCAN_INDEX_X + i]);
		if (ret < 0)
			break;
		accel_3d_adjust_channel_bit_mask(channels,
				CHANNEL_SCAN_INDEX_X + i,
				st->accel[CHANNEL_SCAN_INDEX_X + i].size);
	}
	dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n",
			st->accel[0].index,
			st->accel[0].report_id,
			st->accel[1].index, st->accel[1].report_id,
			st->accel[2].index, st->accel[2].report_id);

	st->scale_precision = hid_sensor_format_scale(
				HID_USAGE_SENSOR_ACCEL_3D,
				&st->accel[CHANNEL_SCAN_INDEX_X],
				&st->scale_pre_decml, &st->scale_post_decml);

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

	return ret;
}

/* Function to initialize the processing for usage id */
static int hid_accel_3d_probe(struct platform_device *pdev)
{
	int ret = 0;
	static const char *name = "accel_3d";
	struct iio_dev *indio_dev;
	struct accel_3d_state *accel_state;
	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;

	indio_dev = devm_iio_device_alloc(&pdev->dev,
					  sizeof(struct accel_3d_state));
	if (indio_dev == NULL)
		return -ENOMEM;

	platform_set_drvdata(pdev, indio_dev);

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

	ret = hid_sensor_parse_common_attributes(hsdev,
					HID_USAGE_SENSOR_ACCEL_3D,
					&accel_state->common_attributes);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup common attributes\n");
		return ret;
	}

	indio_dev->channels = kmemdup(accel_3d_channels,
				      sizeof(accel_3d_channels), GFP_KERNEL);
	if (!indio_dev->channels) {
		dev_err(&pdev->dev, "failed to duplicate channels\n");
		return -ENOMEM;
	}

	ret = accel_3d_parse_report(pdev, hsdev,
				    (struct iio_chan_spec *)indio_dev->channels,
				    HID_USAGE_SENSOR_ACCEL_3D, accel_state);
	if (ret) {
		dev_err(&pdev->dev, "failed to setup attributes\n");
		goto error_free_dev_mem;
	}

	indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels);
	indio_dev->dev.parent = &pdev->dev;
	indio_dev->info = &accel_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;
	}
	atomic_set(&accel_state->common_attributes.data_ready, 0);
	ret = hid_sensor_setup_trigger(indio_dev, name,
					&accel_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;
	}

	accel_state->callbacks.send_event = accel_3d_proc_event;
	accel_state->callbacks.capture_sample = accel_3d_capture_sample;
	accel_state->callbacks.pdev = pdev;
	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D,
					&accel_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(&accel_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_accel_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 accel_3d_state *accel_state = iio_priv(indio_dev);

	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D);
	iio_device_unregister(indio_dev);
	hid_sensor_remove_trigger(&accel_state->common_attributes);
	iio_triggered_buffer_cleanup(indio_dev);
	kfree(indio_dev->channels);

	return 0;
}

static const struct platform_device_id hid_accel_3d_ids[] = {
	{
		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
		.name = "HID-SENSOR-200073",
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, hid_accel_3d_ids);

static struct platform_driver hid_accel_3d_platform_driver = {
	.id_table = hid_accel_3d_ids,
	.driver = {
		.name	= KBUILD_MODNAME,
		.pm	= &hid_sensor_pm_ops,
	},
	.probe		= hid_accel_3d_probe,
	.remove		= hid_accel_3d_remove,
};
module_platform_driver(hid_accel_3d_platform_driver);

MODULE_DESCRIPTION("HID Sensor Accel 3D");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
45fe6f7d	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>
c6399453	25	#include <linux/delay.h>
45fe6f7d	26	#include <linux/hid-sensor-hub.h>
	27	#include <linux/iio/iio.h>
	28	#include <linux/iio/sysfs.h>
	29	#include <linux/iio/buffer.h>
	30	#include <linux/iio/trigger_consumer.h>
	31	#include <linux/iio/triggered_buffer.h>
45fe6f7d	32	#include "../common/hid-sensors/hid-sensor-trigger.h"
45fe6f7d	33
45fe6f7d	34	enum accel_3d_channel {
	35	CHANNEL_SCAN_INDEX_X,
	36	CHANNEL_SCAN_INDEX_Y,
	37	CHANNEL_SCAN_INDEX_Z,
	38	ACCEL_3D_CHANNEL_MAX,
	39	};
	40
	41	struct accel_3d_state {
	42	struct hid_sensor_hub_callbacks callbacks;
e07c6d17	43	struct hid_sensor_common common_attributes;
45fe6f7d	44	struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX];
45fe6f7d	45	u32 accel_val[ACCEL_3D_CHANNEL_MAX];
73a24988 SP	46	int scale_pre_decml;
	47	int scale_post_decml;
	48	int scale_precision;
	49	int value_offset;
45fe6f7d	50	};
	51
	52	static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = {
	53	HID_USAGE_SENSOR_ACCEL_X_AXIS,
	54	HID_USAGE_SENSOR_ACCEL_Y_AXIS,
	55	HID_USAGE_SENSOR_ACCEL_Z_AXIS
	56	};
	57
	58	/* Channel definitions */
	59	static const struct iio_chan_spec accel_3d_channels[] = {
	60	{
	61	.type = IIO_ACCEL,
	62	.modified = 1,
	63	.channel2 = IIO_MOD_X,
c6399453	64	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
ecbe18f2 JC	65	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	66	BIT(IIO_CHAN_INFO_SCALE) \|
	67	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	68	BIT(IIO_CHAN_INFO_HYSTERESIS),
45fe6f7d	69	.scan_index = CHANNEL_SCAN_INDEX_X,
	70	}, {
	71	.type = IIO_ACCEL,
	72	.modified = 1,
	73	.channel2 = IIO_MOD_Y,
c6399453	74	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
ecbe18f2 JC	75	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	76	BIT(IIO_CHAN_INFO_SCALE) \|
	77	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	78	BIT(IIO_CHAN_INFO_HYSTERESIS),
45fe6f7d	79	.scan_index = CHANNEL_SCAN_INDEX_Y,
	80	}, {
	81	.type = IIO_ACCEL,
	82	.modified = 1,
	83	.channel2 = IIO_MOD_Z,
c6399453	84	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
ecbe18f2 JC	85	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) \|
	86	BIT(IIO_CHAN_INFO_SCALE) \|
	87	BIT(IIO_CHAN_INFO_SAMP_FREQ) \|
	88	BIT(IIO_CHAN_INFO_HYSTERESIS),
45fe6f7d	89	.scan_index = CHANNEL_SCAN_INDEX_Z,
	90	}
	91	};
	92
	93	/* Adjust channel real bits based on report descriptor */
	94	static void accel_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
	95	int channel, int size)
	96	{
	97	channels[channel].scan_type.sign = 's';
	98	/* Real storage bits will change based on the report desc. */
	99	channels[channel].scan_type.realbits = size * 8;
	100	/* Maximum size of a sample to capture is u32 */
	101	channels[channel].scan_type.storagebits = sizeof(u32) * 8;
	102	}
	103
	104	/* Channel read_raw handler */
	105	static int accel_3d_read_raw(struct iio_dev *indio_dev,
	106	struct iio_chan_spec const *chan,
	107	int val, int val2,
	108	long mask)
	109	{
	110	struct accel_3d_state *accel_state = iio_priv(indio_dev);
	111	int report_id = -1;
	112	u32 address;
45fe6f7d	113	int ret_type;
	114
	115	*val = 0;
	116	*val2 = 0;
	117	switch (mask) {
	118	case 0:
c6399453	119	hid_sensor_power_state(&accel_state->common_attributes, true);
45fe6f7d	120	report_id = accel_state->accel[chan->scan_index].report_id;
	121	address = accel_3d_addresses[chan->scan_index];
	122	if (report_id >= 0)
	123	*val = sensor_hub_input_attr_get_raw_value(
c6399453 SP	124	accel_state->common_attributes.hsdev,
c6399453 SP	125	HID_USAGE_SENSOR_ACCEL_3D, address,
b3f4737d SP	126	report_id,
b3f4737d SP	127	SENSOR_HUB_SYNC);
45fe6f7d	128	else {
45fe6f7d	129	*val = 0;
c6399453 SP	130	hid_sensor_power_state(&accel_state->common_attributes,
c6399453 SP	131	false);
45fe6f7d	132	return -EINVAL;
45fe6f7d	133	}
c6399453	134	hid_sensor_power_state(&accel_state->common_attributes, false);
45fe6f7d	135	ret_type = IIO_VAL_INT;
	136	break;
	137	case IIO_CHAN_INFO_SCALE:
73a24988 SP	138	*val = accel_state->scale_pre_decml;
	139	*val2 = accel_state->scale_post_decml;
	140	ret_type = accel_state->scale_precision;
45fe6f7d	141	break;
45fe6f7d	142	case IIO_CHAN_INFO_OFFSET:
73a24988	143	*val = accel_state->value_offset;
45fe6f7d	144	ret_type = IIO_VAL_INT;
	145	break;
	146	case IIO_CHAN_INFO_SAMP_FREQ:
2f084c17	147	ret_type = hid_sensor_read_samp_freq_value(
45fe6f7d	148	&accel_state->common_attributes, val, val2);
45fe6f7d	149	break;
45fe6f7d	150	case IIO_CHAN_INFO_HYSTERESIS:
2f084c17	151	ret_type = hid_sensor_read_raw_hyst_value(
45fe6f7d	152	&accel_state->common_attributes, val, val2);
45fe6f7d	153	break;
	154	default:
	155	ret_type = -EINVAL;
	156	break;
	157	}
	158
	159	return ret_type;
	160	}
	161
	162	/* Channel write_raw handler */
	163	static int accel_3d_write_raw(struct iio_dev *indio_dev,
	164	struct iio_chan_spec const *chan,
	165	int val,
	166	int val2,
	167	long mask)
	168	{
	169	struct accel_3d_state *accel_state = iio_priv(indio_dev);
	170	int ret = 0;
	171
	172	switch (mask) {
	173	case IIO_CHAN_INFO_SAMP_FREQ:
	174	ret = hid_sensor_write_samp_freq_value(
	175	&accel_state->common_attributes, val, val2);
	176	break;
	177	case IIO_CHAN_INFO_HYSTERESIS:
	178	ret = hid_sensor_write_raw_hyst_value(
	179	&accel_state->common_attributes, val, val2);
	180	break;
	181	default:
	182	ret = -EINVAL;
	183	}
	184
	185	return ret;
	186	}
	187
45fe6f7d	188	static const struct iio_info accel_3d_info = {
	189	.driver_module = THIS_MODULE,
	190	.read_raw = &accel_3d_read_raw,
	191	.write_raw = &accel_3d_write_raw,
45fe6f7d	192	};
	193
	194	/* Function to push data to buffer */
8c60c7e7 LPC	195	static void hid_sensor_push_data(struct iio_dev indio_dev, const void data,
8c60c7e7 LPC	196	int len)
45fe6f7d	197	{
45fe6f7d	198	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
8c60c7e7	199	iio_push_to_buffers(indio_dev, data);
45fe6f7d	200	}
	201
	202	/* Callback handler to send event after all samples are received and captured */
	203	static int accel_3d_proc_event(struct hid_sensor_hub_device *hsdev,
	204	unsigned usage_id,
	205	void *priv)
	206	{
	207	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	208	struct accel_3d_state *accel_state = iio_priv(indio_dev);
	209
56ff6be6 SP	210	dev_dbg(&indio_dev->dev, "accel_3d_proc_event\n");
56ff6be6 SP	211	if (atomic_read(&accel_state->common_attributes.data_ready))
45fe6f7d	212	hid_sensor_push_data(indio_dev,
8c60c7e7	213	accel_state->accel_val,
45fe6f7d	214	sizeof(accel_state->accel_val));
	215
	216	return 0;
	217	}
	218
	219	/* Capture samples in local storage */
	220	static int accel_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
	221	unsigned usage_id,
	222	size_t raw_len, char *raw_data,
	223	void *priv)
	224	{
	225	struct iio_dev *indio_dev = platform_get_drvdata(priv);
	226	struct accel_3d_state *accel_state = iio_priv(indio_dev);
	227	int offset;
	228	int ret = -EINVAL;
	229
	230	switch (usage_id) {
	231	case HID_USAGE_SENSOR_ACCEL_X_AXIS:
	232	case HID_USAGE_SENSOR_ACCEL_Y_AXIS:
	233	case HID_USAGE_SENSOR_ACCEL_Z_AXIS:
	234	offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS;
	235	accel_state->accel_val[CHANNEL_SCAN_INDEX_X + offset] =
	236	(u32 )raw_data;
	237	ret = 0;
	238	break;
	239	default:
	240	break;
	241	}
	242
	243	return ret;
	244	}
	245
	246	/* Parse report which is specific to an usage id*/
	247	static int accel_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 accel_3d_state *st)
	252	{
	253	int ret;
	254	int i;
	255
	256	for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
	257	ret = sensor_hub_input_get_attribute_info(hsdev,
	258	HID_INPUT_REPORT,
	259	usage_id,
	260	HID_USAGE_SENSOR_ACCEL_X_AXIS + i,
	261	&st->accel[CHANNEL_SCAN_INDEX_X + i]);
	262	if (ret < 0)
	263	break;
	264	accel_3d_adjust_channel_bit_mask(channels,
	265	CHANNEL_SCAN_INDEX_X + i,
	266	st->accel[CHANNEL_SCAN_INDEX_X + i].size);
	267	}
	268	dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n",
	269	st->accel[0].index,
	270	st->accel[0].report_id,
	271	st->accel[1].index, st->accel[1].report_id,
	272	st->accel[2].index, st->accel[2].report_id);
	273
73a24988 SP	274	st->scale_precision = hid_sensor_format_scale(
	275	HID_USAGE_SENSOR_ACCEL_3D,
	276	&st->accel[CHANNEL_SCAN_INDEX_X],
	277	&st->scale_pre_decml, &st->scale_post_decml);
	278
64528d03 SP	279	/* Set Sensitivity field ids, when there is no individual modifier */
	280	if (st->common_attributes.sensitivity.index < 0) {
	281	sensor_hub_input_get_attribute_info(hsdev,
	282	HID_FEATURE_REPORT, usage_id,
	283	HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS \|
	284	HID_USAGE_SENSOR_DATA_ACCELERATION,
	285	&st->common_attributes.sensitivity);
	286	dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
	287	st->common_attributes.sensitivity.index,
	288	st->common_attributes.sensitivity.report_id);
	289	}
	290
45fe6f7d	291	return ret;
	292	}
	293
	294	/* Function to initialize the processing for usage id */
fc52692c	295	static int hid_accel_3d_probe(struct platform_device *pdev)
45fe6f7d	296	{
	297	int ret = 0;
	298	static const char *name = "accel_3d";
	299	struct iio_dev *indio_dev;
	300	struct accel_3d_state *accel_state;
	301	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
45fe6f7d	302
6b545eed SK	303	indio_dev = devm_iio_device_alloc(&pdev->dev,
	304	sizeof(struct accel_3d_state));
	305	if (indio_dev == NULL)
	306	return -ENOMEM;
	307
45fe6f7d	308	platform_set_drvdata(pdev, indio_dev);
	309
	310	accel_state = iio_priv(indio_dev);
	311	accel_state->common_attributes.hsdev = hsdev;
	312	accel_state->common_attributes.pdev = pdev;
	313
	314	ret = hid_sensor_parse_common_attributes(hsdev,
	315	HID_USAGE_SENSOR_ACCEL_3D,
	316	&accel_state->common_attributes);
	317	if (ret) {
	318	dev_err(&pdev->dev, "failed to setup common attributes\n");
6b545eed	319	return ret;
45fe6f7d	320	}
45fe6f7d	321
b136faff FE	322	indio_dev->channels = kmemdup(accel_3d_channels,
	323	sizeof(accel_3d_channels), GFP_KERNEL);
	324	if (!indio_dev->channels) {
45fe6f7d	325	dev_err(&pdev->dev, "failed to duplicate channels\n");
6b545eed	326	return -ENOMEM;
45fe6f7d	327	}
45fe6f7d	328
b136faff FE	329	ret = accel_3d_parse_report(pdev, hsdev,
	330	(struct iio_chan_spec *)indio_dev->channels,
	331	HID_USAGE_SENSOR_ACCEL_3D, accel_state);
45fe6f7d	332	if (ret) {
	333	dev_err(&pdev->dev, "failed to setup attributes\n");
	334	goto error_free_dev_mem;
	335	}
	336
45fe6f7d	337	indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels);
	338	indio_dev->dev.parent = &pdev->dev;
	339	indio_dev->info = &accel_3d_info;
	340	indio_dev->name = name;
	341	indio_dev->modes = INDIO_DIRECT_MODE;
	342
	343	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
	344	NULL, NULL);
	345	if (ret) {
	346	dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
	347	goto error_free_dev_mem;
	348	}
56ff6be6	349	atomic_set(&accel_state->common_attributes.data_ready, 0);
45fe6f7d	350	ret = hid_sensor_setup_trigger(indio_dev, name,
	351	&accel_state->common_attributes);
	352	if (ret < 0) {
	353	dev_err(&pdev->dev, "trigger setup failed\n");
	354	goto error_unreg_buffer_funcs;
	355	}
	356
	357	ret = iio_device_register(indio_dev);
	358	if (ret) {
	359	dev_err(&pdev->dev, "device register failed\n");
	360	goto error_remove_trigger;
	361	}
	362
	363	accel_state->callbacks.send_event = accel_3d_proc_event;
	364	accel_state->callbacks.capture_sample = accel_3d_capture_sample;
	365	accel_state->callbacks.pdev = pdev;
	366	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D,
	367	&accel_state->callbacks);
	368	if (ret < 0) {
	369	dev_err(&pdev->dev, "callback reg failed\n");
	370	goto error_iio_unreg;
	371	}
	372
	373	return ret;
	374
	375	error_iio_unreg:
	376	iio_device_unregister(indio_dev);
	377	error_remove_trigger:
ec7f68e0	378	hid_sensor_remove_trigger(&accel_state->common_attributes);
45fe6f7d	379	error_unreg_buffer_funcs:
	380	iio_triggered_buffer_cleanup(indio_dev);
	381	error_free_dev_mem:
	382	kfree(indio_dev->channels);
45fe6f7d	383	return ret;
	384	}
	385
	386	/* Function to deinitialize the processing for usage id */
fc52692c	387	static int hid_accel_3d_remove(struct platform_device *pdev)
45fe6f7d	388	{
	389	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
	390	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
ec7f68e0	391	struct accel_3d_state *accel_state = iio_priv(indio_dev);
45fe6f7d	392
	393	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D);
	394	iio_device_unregister(indio_dev);
ec7f68e0	395	hid_sensor_remove_trigger(&accel_state->common_attributes);
45fe6f7d	396	iio_triggered_buffer_cleanup(indio_dev);
45fe6f7d	397	kfree(indio_dev->channels);
45fe6f7d	398
	399	return 0;
	400	}
	401
76ec50a1	402	static const struct platform_device_id hid_accel_3d_ids[] = {
66c721f7 AH	403	{
	404	/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
	405	.name = "HID-SENSOR-200073",
	406	},
	407	{ /* sentinel */ }
	408	};
	409	MODULE_DEVICE_TABLE(platform, hid_accel_3d_ids);
	410
45fe6f7d	411	static struct platform_driver hid_accel_3d_platform_driver = {
66c721f7	412	.id_table = hid_accel_3d_ids,
45fe6f7d	413	.driver = {
66c721f7	414	.name = KBUILD_MODNAME,
cbbcc937	415	.pm = &hid_sensor_pm_ops,
45fe6f7d	416	},
	417	.probe = hid_accel_3d_probe,
	418	.remove = hid_accel_3d_remove,
	419	};
	420	module_platform_driver(hid_accel_3d_platform_driver);
	421
	422	MODULE_DESCRIPTION("HID Sensor Accel 3D");
	423	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
	424	MODULE_LICENSE("GPL");