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Diffstat (limited to 'drivers/iio/orientation/hid-sensor-incl-3d.c')
-rw-r--r--drivers/iio/orientation/hid-sensor-incl-3d.c422
1 files changed, 422 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..ba5b581d5
--- /dev/null
+++ b/drivers/iio/orientation/hid-sensor-incl-3d.c
@@ -0,0 +1,422 @@
+// 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/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 incl_3d_channel {
+ CHANNEL_SCAN_INDEX_X,
+ CHANNEL_SCAN_INDEX_Y,
+ CHANNEL_SCAN_INDEX_Z,
+ INCLI_3D_CHANNEL_MAX,
+};
+
+#define CHANNEL_SCAN_INDEX_TIMESTAMP 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];
+ struct {
+ u32 incl_val[INCLI_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 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
+};
+
+static const u32 incl_3d_sensitivity_addresses[] = {
+ HID_USAGE_SENSOR_DATA_ORIENTATION,
+ HID_USAGE_SENSOR_ORIENT_TILT,
+};
+
+/* 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,
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP),
+};
+
+/* 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,
+};
+
+/* 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)) {
+ if (!incl_state->timestamp)
+ incl_state->timestamp = iio_get_time_ns(indio_dev);
+
+ iio_push_to_buffers_with_timestamp(indio_dev,
+ &incl_state->scan,
+ incl_state->timestamp);
+
+ incl_state->timestamp = 0;
+ }
+
+ 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->scan.incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data;
+ break;
+ case HID_USAGE_SENSOR_ORIENT_TILT_Y:
+ incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data;
+ break;
+ case HID_USAGE_SENSOR_ORIENT_TILT_Z:
+ incl_state->scan.incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data;
+ break;
+ case HID_USAGE_SENSOR_TIME_TIMESTAMP:
+ incl_state->timestamp =
+ hid_sensor_convert_timestamp(&incl_state->common_attributes,
+ *(s64 *)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);
+
+ 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,
+ incl_3d_sensitivity_addresses,
+ ARRAY_SIZE(incl_3d_sensitivity_addresses));
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ indio_dev->channels = devm_kmemdup(&pdev->dev, 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");
+ return ret;
+ }
+
+ 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");
+ return ret;
+ }
+
+ 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);
+ 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);
+
+ 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");
+MODULE_IMPORT_NS(IIO_HID);