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-rw-r--r--drivers/iio/orientation/Kconfig31
-rw-r--r--drivers/iio/orientation/Makefile7
-rw-r--r--drivers/iio/orientation/hid-sensor-incl-3d.c443
-rw-r--r--drivers/iio/orientation/hid-sensor-rotation.c385
4 files changed, 866 insertions, 0 deletions
diff --git a/drivers/iio/orientation/Kconfig b/drivers/iio/orientation/Kconfig
new file mode 100644
index 000000000..e3aa1e58d
--- /dev/null
+++ b/drivers/iio/orientation/Kconfig
@@ -0,0 +1,31 @@
+#
+# Inclinometer sensors
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Inclinometer sensors"
+
+config HID_SENSOR_INCLINOMETER_3D
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID Inclinometer 3D"
+ help
+ Say yes here to build support for the HID SENSOR
+ Inclinometer 3D.
+
+config HID_SENSOR_DEVICE_ROTATION
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID Device Rotation"
+ help
+ Say yes here to build support for the HID SENSOR
+ device rotation. The output of a device rotation sensor
+ is presented using quaternion format.
+
+endmenu
diff --git a/drivers/iio/orientation/Makefile b/drivers/iio/orientation/Makefile
new file mode 100644
index 000000000..4734dabbd
--- /dev/null
+++ b/drivers/iio/orientation/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for industrial I/O Inclinometer sensor drivers
+#
+
+# When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_HID_SENSOR_INCLINOMETER_3D) += hid-sensor-incl-3d.o
+obj-$(CONFIG_HID_SENSOR_DEVICE_ROTATION) += hid-sensor-rotation.o
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..bdc5e4554
--- /dev/null
+++ b/drivers/iio/orientation/hid-sensor-incl-3d.c
@@ -0,0 +1,443 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2013, 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.
+ *
+ */
+
+#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 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->dev.parent = &pdev->dev;
+ indio_dev->info = &incl_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(&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_unreg_buffer_funcs;
+ }
+
+ 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(&incl_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_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(&incl_state->common_attributes);
+ iio_triggered_buffer_cleanup(indio_dev);
+ 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");
diff --git a/drivers/iio/orientation/hid-sensor-rotation.c b/drivers/iio/orientation/hid-sensor-rotation.c
new file mode 100644
index 000000000..a69db2002
--- /dev/null
+++ b/drivers/iio/orientation/hid-sensor-rotation.c
@@ -0,0 +1,385 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2014, 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.
+ */
+
+#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"
+
+struct dev_rot_state {
+ struct hid_sensor_hub_callbacks callbacks;
+ struct hid_sensor_common common_attributes;
+ struct hid_sensor_hub_attribute_info quaternion;
+ u32 sampled_vals[4];
+ int scale_pre_decml;
+ int scale_post_decml;
+ int scale_precision;
+ int value_offset;
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec dev_rot_channels[] = {
+ {
+ .type = IIO_ROT,
+ .modified = 1,
+ .channel2 = IIO_MOD_QUATERNION,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS)
+ }
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void dev_rot_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;
+ chan->scan_type.repeat = 4;
+}
+
+/* Channel read_raw handler */
+static int dev_rot_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int size, int *vals, int *val_len,
+ long mask)
+{
+ struct dev_rot_state *rot_state = iio_priv(indio_dev);
+ int ret_type;
+ int i;
+
+ vals[0] = 0;
+ vals[1] = 0;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (size >= 4) {
+ for (i = 0; i < 4; ++i)
+ vals[i] = rot_state->sampled_vals[i];
+ ret_type = IIO_VAL_INT_MULTIPLE;
+ *val_len = 4;
+ } else
+ ret_type = -EINVAL;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ vals[0] = rot_state->scale_pre_decml;
+ vals[1] = rot_state->scale_post_decml;
+ return rot_state->scale_precision;
+
+ case IIO_CHAN_INFO_OFFSET:
+ *vals = rot_state->value_offset;
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret_type = hid_sensor_read_samp_freq_value(
+ &rot_state->common_attributes, &vals[0], &vals[1]);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret_type = hid_sensor_read_raw_hyst_value(
+ &rot_state->common_attributes, &vals[0], &vals[1]);
+ break;
+ default:
+ ret_type = -EINVAL;
+ break;
+ }
+
+ return ret_type;
+}
+
+/* Channel write_raw handler */
+static int dev_rot_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct dev_rot_state *rot_state = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = hid_sensor_write_samp_freq_value(
+ &rot_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret = hid_sensor_write_raw_hyst_value(
+ &rot_state->common_attributes, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct iio_info dev_rot_info = {
+ .read_raw_multi = &dev_rot_read_raw,
+ .write_raw = &dev_rot_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);
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data <<\n");
+
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int dev_rot_proc_event(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct dev_rot_state *rot_state = iio_priv(indio_dev);
+
+ dev_dbg(&indio_dev->dev, "dev_rot_proc_event\n");
+ if (atomic_read(&rot_state->common_attributes.data_ready))
+ hid_sensor_push_data(indio_dev,
+ (u8 *)rot_state->sampled_vals,
+ sizeof(rot_state->sampled_vals));
+
+ return 0;
+}
+
+/* Capture samples in local storage */
+static int dev_rot_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 dev_rot_state *rot_state = iio_priv(indio_dev);
+
+ if (usage_id == HID_USAGE_SENSOR_ORIENT_QUATERNION) {
+ memcpy(rot_state->sampled_vals, raw_data,
+ sizeof(rot_state->sampled_vals));
+ dev_dbg(&indio_dev->dev, "Recd Quat len:%zu::%zu\n", raw_len,
+ sizeof(rot_state->sampled_vals));
+ }
+
+ return 0;
+}
+
+/* Parse report which is specific to an usage id*/
+static int dev_rot_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ struct iio_chan_spec *channels,
+ unsigned usage_id,
+ struct dev_rot_state *st)
+{
+ int ret;
+
+ ret = sensor_hub_input_get_attribute_info(hsdev,
+ HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_ORIENT_QUATERNION,
+ &st->quaternion);
+ if (ret)
+ return ret;
+
+ dev_rot_adjust_channel_bit_mask(&channels[0],
+ st->quaternion.size / 4);
+
+ dev_dbg(&pdev->dev, "dev_rot %x:%x\n", st->quaternion.index,
+ st->quaternion.report_id);
+
+ dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n",
+ st->quaternion.size);
+
+ st->scale_precision = hid_sensor_format_scale(
+ hsdev->usage,
+ &st->quaternion,
+ &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 0;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_dev_rot_probe(struct platform_device *pdev)
+{
+ int ret;
+ char *name;
+ struct iio_dev *indio_dev;
+ struct dev_rot_state *rot_state;
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev,
+ sizeof(struct dev_rot_state));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ rot_state = iio_priv(indio_dev);
+ rot_state->common_attributes.hsdev = hsdev;
+ rot_state->common_attributes.pdev = pdev;
+
+ switch (hsdev->usage) {
+ case HID_USAGE_SENSOR_DEVICE_ORIENTATION:
+ name = "dev_rotation";
+ break;
+ case HID_USAGE_SENSOR_RELATIVE_ORIENTATION:
+ name = "relative_orientation";
+ break;
+ case HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION:
+ name = "geomagnetic_orientation";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage,
+ &rot_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ indio_dev->channels = devm_kmemdup(&pdev->dev, dev_rot_channels,
+ sizeof(dev_rot_channels),
+ GFP_KERNEL);
+ if (!indio_dev->channels) {
+ dev_err(&pdev->dev, "failed to duplicate channels\n");
+ return -ENOMEM;
+ }
+
+ ret = dev_rot_parse_report(pdev, hsdev,
+ (struct iio_chan_spec *)indio_dev->channels,
+ hsdev->usage, rot_state);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup attributes\n");
+ return ret;
+ }
+
+ indio_dev->num_channels = ARRAY_SIZE(dev_rot_channels);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &dev_rot_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");
+ return ret;
+ }
+ atomic_set(&rot_state->common_attributes.data_ready, 0);
+ ret = hid_sensor_setup_trigger(indio_dev, name,
+ &rot_state->common_attributes);
+ if (ret) {
+ 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;
+ }
+
+ rot_state->callbacks.send_event = dev_rot_proc_event;
+ rot_state->callbacks.capture_sample = dev_rot_capture_sample;
+ rot_state->callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev, hsdev->usage,
+ &rot_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(&rot_state->common_attributes);
+error_unreg_buffer_funcs:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_dev_rot_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 dev_rot_state *rot_state = iio_priv(indio_dev);
+
+ sensor_hub_remove_callback(hsdev, hsdev->usage);
+ iio_device_unregister(indio_dev);
+ hid_sensor_remove_trigger(&rot_state->common_attributes);
+ iio_triggered_buffer_cleanup(indio_dev);
+
+ return 0;
+}
+
+static const struct platform_device_id hid_dev_rot_ids[] = {
+ {
+ /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+ .name = "HID-SENSOR-20008a",
+ },
+ {
+ /* Relative orientation(AG) sensor */
+ .name = "HID-SENSOR-20008e",
+ },
+ {
+ /* Geomagnetic orientation(AM) sensor */
+ .name = "HID-SENSOR-2000c1",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids);
+
+static struct platform_driver hid_dev_rot_platform_driver = {
+ .id_table = hid_dev_rot_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .pm = &hid_sensor_pm_ops,
+ },
+ .probe = hid_dev_rot_probe,
+ .remove = hid_dev_rot_remove,
+};
+module_platform_driver(hid_dev_rot_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Device Rotation");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 11:30:09 +0000