1 files changed, 420 insertions, 0 deletions

diff --git a/drivers/iio/orientation/hid-sensor-incl-3d.c b/drivers/iio/orientation/hid-sensor-incl-3d.c
new file mode 100644
index 000000000..ae132a93b
--- /dev/null
+++ b/drivers/iio/orientation/hid-sensor-incl-3d.c
@@ -0,0 +1,420 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2013, Intel Corporation.
+ */
+
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/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 "../common/hid-sensors/hid-sensor-trigger.h"
+
+enum incl_3d_channel {
+	CHANNEL_SCAN_INDEX_X,
+	CHANNEL_SCAN_INDEX_Y,
+	CHANNEL_SCAN_INDEX_Z,
+	INCLI_3D_CHANNEL_MAX,
+};
+
+struct incl_3d_state {
+	struct hid_sensor_hub_callbacks callbacks;
+	struct hid_sensor_common common_attributes;
+	struct hid_sensor_hub_attribute_info incl[INCLI_3D_CHANNEL_MAX];
+	u32 incl_val[INCLI_3D_CHANNEL_MAX];
+	int scale_pre_decml;
+	int scale_post_decml;
+	int scale_precision;
+	int value_offset;
+};
+
+static const u32 incl_3d_addresses[INCLI_3D_CHANNEL_MAX] = {
+	HID_USAGE_SENSOR_ORIENT_TILT_X,
+	HID_USAGE_SENSOR_ORIENT_TILT_Y,
+	HID_USAGE_SENSOR_ORIENT_TILT_Z
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec incl_3d_channels[] = {
+	{
+		.type = IIO_INCLI,
+		.modified = 1,
+		.channel2 = IIO_MOD_X,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_X,
+	}, {
+		.type = IIO_INCLI,
+		.modified = 1,
+		.channel2 = IIO_MOD_Y,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_Y,
+	}, {
+		.type = IIO_INCLI,
+		.modified = 1,
+		.channel2 = IIO_MOD_Z,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+		BIT(IIO_CHAN_INFO_SCALE) |
+		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS),
+		.scan_index = CHANNEL_SCAN_INDEX_Z,
+	}
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void incl_3d_adjust_channel_bit_mask(struct iio_chan_spec *chan,
+						int size)
+{
+	chan->scan_type.sign = 's';
+	/* Real storage bits will change based on the report desc. */
+	chan->scan_type.realbits = size * 8;
+	/* Maximum size of a sample to capture is u32 */
+	chan->scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int incl_3d_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int *val, int *val2,
+			      long mask)
+{
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+	int report_id = -1;
+	u32 address;
+	int ret_type;
+	s32 min;
+
+	*val = 0;
+	*val2 = 0;
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		hid_sensor_power_state(&incl_state->common_attributes, true);
+		report_id = incl_state->incl[chan->scan_index].report_id;
+		min = incl_state->incl[chan->scan_index].logical_minimum;
+		address = incl_3d_addresses[chan->scan_index];
+		if (report_id >= 0)
+			*val = sensor_hub_input_attr_get_raw_value(
+				incl_state->common_attributes.hsdev,
+				HID_USAGE_SENSOR_INCLINOMETER_3D, address,
+				report_id,
+				SENSOR_HUB_SYNC,
+				min < 0);
+		else {
+			hid_sensor_power_state(&incl_state->common_attributes,
+						false);
+			return -EINVAL;
+		}
+		hid_sensor_power_state(&incl_state->common_attributes, false);
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		*val = incl_state->scale_pre_decml;
+		*val2 = incl_state->scale_post_decml;
+		ret_type = incl_state->scale_precision;
+		break;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = incl_state->value_offset;
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret_type = hid_sensor_read_samp_freq_value(
+			&incl_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS:
+		ret_type = hid_sensor_read_raw_hyst_value(
+			&incl_state->common_attributes, val, val2);
+		break;
+	default:
+		ret_type = -EINVAL;
+		break;
+	}
+
+	return ret_type;
+}
+
+/* Channel write_raw handler */
+static int incl_3d_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret = hid_sensor_write_samp_freq_value(
+				&incl_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS:
+		ret = hid_sensor_write_raw_hyst_value(
+				&incl_state->common_attributes, val, val2);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct iio_info incl_3d_info = {
+	.read_raw = &incl_3d_read_raw,
+	.write_raw = &incl_3d_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
+{
+	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+	iio_push_to_buffers(indio_dev, (u8 *)data);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id,
+				void *priv)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(priv);
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+
+	dev_dbg(&indio_dev->dev, "incl_3d_proc_event\n");
+	if (atomic_read(&incl_state->common_attributes.data_ready))
+		hid_sensor_push_data(indio_dev,
+				(u8 *)incl_state->incl_val,
+				sizeof(incl_state->incl_val));
+
+	return 0;
+}
+
+/* Capture samples in local storage */
+static int incl_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id,
+				size_t raw_len, char *raw_data,
+				void *priv)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(priv);
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+	int ret = 0;
+
+	switch (usage_id) {
+	case HID_USAGE_SENSOR_ORIENT_TILT_X:
+		incl_state->incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data;
+	break;
+	case HID_USAGE_SENSOR_ORIENT_TILT_Y:
+		incl_state->incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data;
+	break;
+	case HID_USAGE_SENSOR_ORIENT_TILT_Z:
+		incl_state->incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data;
+	break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int incl_3d_parse_report(struct platform_device *pdev,
+				struct hid_sensor_hub_device *hsdev,
+				struct iio_chan_spec *channels,
+				unsigned usage_id,
+				struct incl_3d_state *st)
+{
+	int ret;
+
+	ret = sensor_hub_input_get_attribute_info(hsdev,
+				HID_INPUT_REPORT,
+				usage_id,
+				HID_USAGE_SENSOR_ORIENT_TILT_X,
+				&st->incl[CHANNEL_SCAN_INDEX_X]);
+	if (ret)
+		return ret;
+	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_X],
+				st->incl[CHANNEL_SCAN_INDEX_X].size);
+
+	ret = sensor_hub_input_get_attribute_info(hsdev,
+				HID_INPUT_REPORT,
+				usage_id,
+				HID_USAGE_SENSOR_ORIENT_TILT_Y,
+				&st->incl[CHANNEL_SCAN_INDEX_Y]);
+	if (ret)
+		return ret;
+	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Y],
+				st->incl[CHANNEL_SCAN_INDEX_Y].size);
+
+	ret = sensor_hub_input_get_attribute_info(hsdev,
+				HID_INPUT_REPORT,
+				usage_id,
+				HID_USAGE_SENSOR_ORIENT_TILT_Z,
+				&st->incl[CHANNEL_SCAN_INDEX_Z]);
+	if (ret)
+		return ret;
+	incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Z],
+				st->incl[CHANNEL_SCAN_INDEX_Z].size);
+
+	dev_dbg(&pdev->dev, "incl_3d %x:%x, %x:%x, %x:%x\n",
+			st->incl[0].index,
+			st->incl[0].report_id,
+			st->incl[1].index, st->incl[1].report_id,
+			st->incl[2].index, st->incl[2].report_id);
+
+	st->scale_precision = hid_sensor_format_scale(
+				HID_USAGE_SENSOR_INCLINOMETER_3D,
+				&st->incl[CHANNEL_SCAN_INDEX_X],
+				&st->scale_pre_decml, &st->scale_post_decml);
+
+	/* 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_ORIENTATION,
+			&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_incl_3d_probe(struct platform_device *pdev)
+{
+	int ret;
+	static char *name = "incli_3d";
+	struct iio_dev *indio_dev;
+	struct incl_3d_state *incl_state;
+	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+
+	indio_dev = devm_iio_device_alloc(&pdev->dev,
+					  sizeof(struct incl_3d_state));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, indio_dev);
+
+	incl_state = iio_priv(indio_dev);
+	incl_state->common_attributes.hsdev = hsdev;
+	incl_state->common_attributes.pdev = pdev;
+
+	ret = hid_sensor_parse_common_attributes(hsdev,
+				HID_USAGE_SENSOR_INCLINOMETER_3D,
+				&incl_state->common_attributes);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup common attributes\n");
+		return ret;
+	}
+
+	indio_dev->channels = kmemdup(incl_3d_channels,
+				      sizeof(incl_3d_channels), GFP_KERNEL);
+	if (!indio_dev->channels) {
+		dev_err(&pdev->dev, "failed to duplicate channels\n");
+		return -ENOMEM;
+	}
+
+	ret = incl_3d_parse_report(pdev, hsdev,
+				   (struct iio_chan_spec *)indio_dev->channels,
+				   HID_USAGE_SENSOR_INCLINOMETER_3D,
+				   incl_state);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup attributes\n");
+		goto error_free_dev_mem;
+	}
+
+	indio_dev->num_channels = ARRAY_SIZE(incl_3d_channels);
+	indio_dev->info = &incl_3d_info;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	atomic_set(&incl_state->common_attributes.data_ready, 0);
+
+	ret = hid_sensor_setup_trigger(indio_dev, name,
+					&incl_state->common_attributes);
+	if (ret) {
+		dev_err(&pdev->dev, "trigger setup failed\n");
+		goto error_free_dev_mem;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&pdev->dev, "device register failed\n");
+		goto error_remove_trigger;
+	}
+
+	incl_state->callbacks.send_event = incl_3d_proc_event;
+	incl_state->callbacks.capture_sample = incl_3d_capture_sample;
+	incl_state->callbacks.pdev = pdev;
+	ret = sensor_hub_register_callback(hsdev,
+					HID_USAGE_SENSOR_INCLINOMETER_3D,
+					&incl_state->callbacks);
+	if (ret) {
+		dev_err(&pdev->dev, "callback reg failed\n");
+		goto error_iio_unreg;
+	}
+
+	return 0;
+
+error_iio_unreg:
+	iio_device_unregister(indio_dev);
+error_remove_trigger:
+	hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes);
+error_free_dev_mem:
+	kfree(indio_dev->channels);
+	return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_incl_3d_remove(struct platform_device *pdev)
+{
+	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+	struct incl_3d_state *incl_state = iio_priv(indio_dev);
+
+	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_INCLINOMETER_3D);
+	iio_device_unregister(indio_dev);
+	hid_sensor_remove_trigger(indio_dev, &incl_state->common_attributes);
+	kfree(indio_dev->channels);
+
+	return 0;
+}
+
+static const struct platform_device_id hid_incl_3d_ids[] = {
+	{
+		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+		.name = "HID-SENSOR-200086",
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_incl_3d_ids);
+
+static struct platform_driver hid_incl_3d_platform_driver = {
+	.id_table = hid_incl_3d_ids,
+	.driver = {
+		.name	= KBUILD_MODNAME,
+		.pm	= &hid_sensor_pm_ops,
+	},
+	.probe		= hid_incl_3d_probe,
+	.remove		= hid_incl_3d_remove,
+};
+module_platform_driver(hid_incl_3d_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Inclinometer 3D");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL");