Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 390 insertions, 0 deletions

diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
new file mode 100644
index 0000000000..eb1aedad7e
--- /dev/null
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -0,0 +1,390 @@
+// 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 {
+	CHANNEL_SCAN_INDEX_INTENSITY = 0,
+	CHANNEL_SCAN_INDEX_ILLUM = 1,
+	CHANNEL_SCAN_INDEX_MAX
+};
+
+#define CHANNEL_SCAN_INDEX_TIMESTAMP CHANNEL_SCAN_INDEX_MAX
+
+struct als_state {
+	struct hid_sensor_hub_callbacks callbacks;
+	struct hid_sensor_common common_attributes;
+	struct hid_sensor_hub_attribute_info als_illum;
+	struct {
+		u32 illum[CHANNEL_SCAN_INDEX_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 als_sensitivity_addresses[] = {
+	HID_USAGE_SENSOR_DATA_LIGHT,
+	HID_USAGE_SENSOR_LIGHT_ILLUM,
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec als_channels[] = {
+	{
+		.type = IIO_INTENSITY,
+		.modified = 1,
+		.channel2 = IIO_MOD_LIGHT_BOTH,
+		.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) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE),
+		.scan_index = CHANNEL_SCAN_INDEX_INTENSITY,
+	},
+	{
+		.type = IIO_LIGHT,
+		.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) |
+		BIT(IIO_CHAN_INFO_HYSTERESIS_RELATIVE),
+		.scan_index = CHANNEL_SCAN_INDEX_ILLUM,
+	},
+	IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void als_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 als_read_raw(struct iio_dev *indio_dev,
+			      struct iio_chan_spec const *chan,
+			      int *val, int *val2,
+			      long mask)
+{
+	struct als_state *als_state = iio_priv(indio_dev);
+	struct hid_sensor_hub_device *hsdev = als_state->common_attributes.hsdev;
+	int report_id = -1;
+	u32 address;
+	int ret_type;
+	s32 min;
+
+	*val = 0;
+	*val2 = 0;
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->scan_index) {
+		case  CHANNEL_SCAN_INDEX_INTENSITY:
+		case  CHANNEL_SCAN_INDEX_ILLUM:
+			report_id = als_state->als_illum.report_id;
+			min = als_state->als_illum.logical_minimum;
+			address = HID_USAGE_SENSOR_LIGHT_ILLUM;
+			break;
+		default:
+			report_id = -1;
+			break;
+		}
+		if (report_id >= 0) {
+			hid_sensor_power_state(&als_state->common_attributes,
+						true);
+			*val = sensor_hub_input_attr_get_raw_value(
+					hsdev, hsdev->usage, address, report_id,
+					SENSOR_HUB_SYNC, min < 0);
+			hid_sensor_power_state(&als_state->common_attributes,
+						false);
+		} else {
+			*val = 0;
+			return -EINVAL;
+		}
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		*val = als_state->scale_pre_decml;
+		*val2 = als_state->scale_post_decml;
+		ret_type = als_state->scale_precision;
+		break;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = als_state->value_offset;
+		ret_type = IIO_VAL_INT;
+		break;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret_type = hid_sensor_read_samp_freq_value(
+				&als_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS:
+		ret_type = hid_sensor_read_raw_hyst_value(
+				&als_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS_RELATIVE:
+		ret_type = hid_sensor_read_raw_hyst_rel_value(
+				&als_state->common_attributes, val, val2);
+		break;
+	default:
+		ret_type = -EINVAL;
+		break;
+	}
+
+	return ret_type;
+}
+
+/* Channel write_raw handler */
+static int als_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct als_state *als_state = iio_priv(indio_dev);
+	int ret = 0;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		ret = hid_sensor_write_samp_freq_value(
+				&als_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS:
+		ret = hid_sensor_write_raw_hyst_value(
+				&als_state->common_attributes, val, val2);
+		break;
+	case IIO_CHAN_INFO_HYSTERESIS_RELATIVE:
+		ret = hid_sensor_write_raw_hyst_rel_value(
+				&als_state->common_attributes, val, val2);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct iio_info als_info = {
+	.read_raw = &als_read_raw,
+	.write_raw = &als_write_raw,
+};
+
+/* Callback handler to send event after all samples are received and captured */
+static int als_proc_event(struct hid_sensor_hub_device *hsdev,
+				unsigned usage_id,
+				void *priv)
+{
+	struct iio_dev *indio_dev = platform_get_drvdata(priv);
+	struct als_state *als_state = iio_priv(indio_dev);
+
+	dev_dbg(&indio_dev->dev, "als_proc_event\n");
+	if (atomic_read(&als_state->common_attributes.data_ready)) {
+		if (!als_state->timestamp)
+			als_state->timestamp = iio_get_time_ns(indio_dev);
+
+		iio_push_to_buffers_with_timestamp(indio_dev, &als_state->scan,
+						   als_state->timestamp);
+		als_state->timestamp = 0;
+	}
+
+	return 0;
+}
+
+/* Capture samples in local storage */
+static int als_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 als_state *als_state = iio_priv(indio_dev);
+	int ret = -EINVAL;
+	u32 sample_data = *(u32 *)raw_data;
+
+	switch (usage_id) {
+	case HID_USAGE_SENSOR_LIGHT_ILLUM:
+		als_state->scan.illum[CHANNEL_SCAN_INDEX_INTENSITY] = sample_data;
+		als_state->scan.illum[CHANNEL_SCAN_INDEX_ILLUM] = sample_data;
+		ret = 0;
+		break;
+	case HID_USAGE_SENSOR_TIME_TIMESTAMP:
+		als_state->timestamp = hid_sensor_convert_timestamp(&als_state->common_attributes,
+								    *(s64 *)raw_data);
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int als_parse_report(struct platform_device *pdev,
+				struct hid_sensor_hub_device *hsdev,
+				struct iio_chan_spec *channels,
+				unsigned usage_id,
+				struct als_state *st)
+{
+	int ret;
+
+	ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
+			usage_id,
+			HID_USAGE_SENSOR_LIGHT_ILLUM,
+			&st->als_illum);
+	if (ret < 0)
+		return ret;
+	als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_INTENSITY,
+				    st->als_illum.size);
+	als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_ILLUM,
+					st->als_illum.size);
+
+	dev_dbg(&pdev->dev, "als %x:%x\n", st->als_illum.index,
+			st->als_illum.report_id);
+
+	st->scale_precision = hid_sensor_format_scale(usage_id, &st->als_illum,
+				&st->scale_pre_decml, &st->scale_post_decml);
+
+	return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_als_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+	static const char *name = "als";
+	struct iio_dev *indio_dev;
+	struct als_state *als_state;
+	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+
+	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct als_state));
+	if (!indio_dev)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, indio_dev);
+
+	als_state = iio_priv(indio_dev);
+	als_state->common_attributes.hsdev = hsdev;
+	als_state->common_attributes.pdev = pdev;
+
+	ret = hid_sensor_parse_common_attributes(hsdev,
+					hsdev->usage,
+					&als_state->common_attributes,
+					als_sensitivity_addresses,
+					ARRAY_SIZE(als_sensitivity_addresses));
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup common attributes\n");
+		return ret;
+	}
+
+	indio_dev->channels = devm_kmemdup(&pdev->dev, als_channels,
+					   sizeof(als_channels), GFP_KERNEL);
+	if (!indio_dev->channels) {
+		dev_err(&pdev->dev, "failed to duplicate channels\n");
+		return -ENOMEM;
+	}
+
+	ret = als_parse_report(pdev, hsdev,
+			       (struct iio_chan_spec *)indio_dev->channels,
+			       hsdev->usage,
+			       als_state);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to setup attributes\n");
+		return ret;
+	}
+
+	indio_dev->num_channels =
+				ARRAY_SIZE(als_channels);
+	indio_dev->info = &als_info;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	atomic_set(&als_state->common_attributes.data_ready, 0);
+
+	ret = hid_sensor_setup_trigger(indio_dev, name,
+				&als_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;
+	}
+
+	als_state->callbacks.send_event = als_proc_event;
+	als_state->callbacks.capture_sample = als_capture_sample;
+	als_state->callbacks.pdev = pdev;
+	ret = sensor_hub_register_callback(hsdev, hsdev->usage, &als_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, &als_state->common_attributes);
+	return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_als_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 als_state *als_state = iio_priv(indio_dev);
+
+	sensor_hub_remove_callback(hsdev, hsdev->usage);
+	iio_device_unregister(indio_dev);
+	hid_sensor_remove_trigger(indio_dev, &als_state->common_attributes);
+
+	return 0;
+}
+
+static const struct platform_device_id hid_als_ids[] = {
+	{
+		/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+		.name = "HID-SENSOR-200041",
+	},
+	{
+		/* Format: HID-SENSOR-custom_sensor_tag-usage_id_in_hex_lowercase */
+		.name = "HID-SENSOR-LISS-0041",
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_als_ids);
+
+static struct platform_driver hid_als_platform_driver = {
+	.id_table = hid_als_ids,
+	.driver = {
+		.name	= KBUILD_MODNAME,
+		.pm	= &hid_sensor_pm_ops,
+	},
+	.probe		= hid_als_probe,
+	.remove		= hid_als_remove,
+};
+module_platform_driver(hid_als_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor ALS");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_HID);