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synced 2024-08-21 16:29:59 +00:00
![Ye Xiang](/assets/img/avatar_default.png)
Before, when reading/writing the hysteresis of als, incli-3d, press, and rotation sensor, we will get invalid argument error. This patch add more sensitivity data fields for these sensors, so that these sensors can get sensitivity index and return correct hysteresis value. Signed-off-by: Ye Xiang <xiang.ye@intel.com> Link: https://lore.kernel.org/r/20210201054921.18214-3-xiang.ye@intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
375 lines
9.8 KiB
C
375 lines
9.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* HID Sensors Driver
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* Copyright (c) 2014, Intel Corporation.
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*/
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/slab.h>
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#include <linux/hid-sensor-hub.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/buffer.h>
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#include "../common/hid-sensors/hid-sensor-trigger.h"
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struct dev_rot_state {
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struct hid_sensor_hub_callbacks callbacks;
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struct hid_sensor_common common_attributes;
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struct hid_sensor_hub_attribute_info quaternion;
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struct {
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s32 sampled_vals[4] __aligned(16);
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u64 timestamp __aligned(8);
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} scan;
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int scale_pre_decml;
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int scale_post_decml;
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int scale_precision;
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int value_offset;
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s64 timestamp;
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};
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static const u32 rotation_sensitivity_addresses[] = {
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HID_USAGE_SENSOR_DATA_ORIENTATION,
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HID_USAGE_SENSOR_ORIENT_QUATERNION,
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};
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/* Channel definitions */
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static const struct iio_chan_spec dev_rot_channels[] = {
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{
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.type = IIO_ROT,
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.modified = 1,
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.channel2 = IIO_MOD_QUATERNION,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) |
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BIT(IIO_CHAN_INFO_OFFSET) |
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BIT(IIO_CHAN_INFO_SCALE) |
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BIT(IIO_CHAN_INFO_HYSTERESIS),
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.scan_index = 0
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},
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IIO_CHAN_SOFT_TIMESTAMP(1)
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};
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/* Adjust channel real bits based on report descriptor */
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static void dev_rot_adjust_channel_bit_mask(struct iio_chan_spec *chan,
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int size)
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{
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chan->scan_type.sign = 's';
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/* Real storage bits will change based on the report desc. */
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chan->scan_type.realbits = size * 8;
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/* Maximum size of a sample to capture is u32 */
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chan->scan_type.storagebits = sizeof(u32) * 8;
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chan->scan_type.repeat = 4;
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}
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/* Channel read_raw handler */
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static int dev_rot_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int size, int *vals, int *val_len,
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long mask)
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{
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struct dev_rot_state *rot_state = iio_priv(indio_dev);
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int ret_type;
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int i;
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vals[0] = 0;
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vals[1] = 0;
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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if (size >= 4) {
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for (i = 0; i < 4; ++i)
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vals[i] = rot_state->scan.sampled_vals[i];
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ret_type = IIO_VAL_INT_MULTIPLE;
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*val_len = 4;
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} else
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ret_type = -EINVAL;
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break;
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case IIO_CHAN_INFO_SCALE:
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vals[0] = rot_state->scale_pre_decml;
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vals[1] = rot_state->scale_post_decml;
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return rot_state->scale_precision;
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case IIO_CHAN_INFO_OFFSET:
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*vals = rot_state->value_offset;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SAMP_FREQ:
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ret_type = hid_sensor_read_samp_freq_value(
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&rot_state->common_attributes, &vals[0], &vals[1]);
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break;
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case IIO_CHAN_INFO_HYSTERESIS:
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ret_type = hid_sensor_read_raw_hyst_value(
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&rot_state->common_attributes, &vals[0], &vals[1]);
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break;
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default:
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ret_type = -EINVAL;
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break;
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}
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return ret_type;
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}
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/* Channel write_raw handler */
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static int dev_rot_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int val,
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int val2,
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long mask)
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{
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struct dev_rot_state *rot_state = iio_priv(indio_dev);
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int ret;
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switch (mask) {
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case IIO_CHAN_INFO_SAMP_FREQ:
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ret = hid_sensor_write_samp_freq_value(
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&rot_state->common_attributes, val, val2);
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break;
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case IIO_CHAN_INFO_HYSTERESIS:
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ret = hid_sensor_write_raw_hyst_value(
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&rot_state->common_attributes, val, val2);
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static const struct iio_info dev_rot_info = {
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.read_raw_multi = &dev_rot_read_raw,
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.write_raw = &dev_rot_write_raw,
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};
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/* Callback handler to send event after all samples are received and captured */
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static int dev_rot_proc_event(struct hid_sensor_hub_device *hsdev,
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unsigned usage_id,
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void *priv)
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{
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struct iio_dev *indio_dev = platform_get_drvdata(priv);
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struct dev_rot_state *rot_state = iio_priv(indio_dev);
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dev_dbg(&indio_dev->dev, "dev_rot_proc_event\n");
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if (atomic_read(&rot_state->common_attributes.data_ready)) {
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if (!rot_state->timestamp)
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rot_state->timestamp = iio_get_time_ns(indio_dev);
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iio_push_to_buffers_with_timestamp(indio_dev, &rot_state->scan,
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rot_state->timestamp);
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rot_state->timestamp = 0;
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}
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return 0;
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}
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/* Capture samples in local storage */
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static int dev_rot_capture_sample(struct hid_sensor_hub_device *hsdev,
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unsigned usage_id,
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size_t raw_len, char *raw_data,
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void *priv)
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{
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struct iio_dev *indio_dev = platform_get_drvdata(priv);
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struct dev_rot_state *rot_state = iio_priv(indio_dev);
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if (usage_id == HID_USAGE_SENSOR_ORIENT_QUATERNION) {
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if (raw_len / 4 == sizeof(s16)) {
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rot_state->scan.sampled_vals[0] = ((s16 *)raw_data)[0];
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rot_state->scan.sampled_vals[1] = ((s16 *)raw_data)[1];
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rot_state->scan.sampled_vals[2] = ((s16 *)raw_data)[2];
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rot_state->scan.sampled_vals[3] = ((s16 *)raw_data)[3];
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} else {
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memcpy(&rot_state->scan.sampled_vals, raw_data,
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sizeof(rot_state->scan.sampled_vals));
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}
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dev_dbg(&indio_dev->dev, "Recd Quat len:%zu::%zu\n", raw_len,
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sizeof(rot_state->scan.sampled_vals));
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} else if (usage_id == HID_USAGE_SENSOR_TIME_TIMESTAMP) {
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rot_state->timestamp = hid_sensor_convert_timestamp(&rot_state->common_attributes,
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*(s64 *)raw_data);
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}
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return 0;
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}
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/* Parse report which is specific to an usage id*/
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static int dev_rot_parse_report(struct platform_device *pdev,
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struct hid_sensor_hub_device *hsdev,
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struct iio_chan_spec *channels,
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unsigned usage_id,
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struct dev_rot_state *st)
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{
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int ret;
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ret = sensor_hub_input_get_attribute_info(hsdev,
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HID_INPUT_REPORT,
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usage_id,
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HID_USAGE_SENSOR_ORIENT_QUATERNION,
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&st->quaternion);
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if (ret)
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return ret;
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dev_rot_adjust_channel_bit_mask(&channels[0],
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st->quaternion.size / 4);
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dev_dbg(&pdev->dev, "dev_rot %x:%x\n", st->quaternion.index,
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st->quaternion.report_id);
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dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n",
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st->quaternion.size);
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st->scale_precision = hid_sensor_format_scale(
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hsdev->usage,
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&st->quaternion,
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&st->scale_pre_decml, &st->scale_post_decml);
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return 0;
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}
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/* Function to initialize the processing for usage id */
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static int hid_dev_rot_probe(struct platform_device *pdev)
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{
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int ret;
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char *name;
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struct iio_dev *indio_dev;
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struct dev_rot_state *rot_state;
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struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
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indio_dev = devm_iio_device_alloc(&pdev->dev,
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sizeof(struct dev_rot_state));
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if (indio_dev == NULL)
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return -ENOMEM;
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platform_set_drvdata(pdev, indio_dev);
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rot_state = iio_priv(indio_dev);
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rot_state->common_attributes.hsdev = hsdev;
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rot_state->common_attributes.pdev = pdev;
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switch (hsdev->usage) {
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case HID_USAGE_SENSOR_DEVICE_ORIENTATION:
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name = "dev_rotation";
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break;
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case HID_USAGE_SENSOR_RELATIVE_ORIENTATION:
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name = "relative_orientation";
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break;
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case HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION:
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name = "geomagnetic_orientation";
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break;
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default:
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return -EINVAL;
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}
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ret = hid_sensor_parse_common_attributes(hsdev,
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hsdev->usage,
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&rot_state->common_attributes,
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rotation_sensitivity_addresses,
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ARRAY_SIZE(rotation_sensitivity_addresses));
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if (ret) {
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dev_err(&pdev->dev, "failed to setup common attributes\n");
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return ret;
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}
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indio_dev->channels = devm_kmemdup(&pdev->dev, dev_rot_channels,
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sizeof(dev_rot_channels),
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GFP_KERNEL);
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if (!indio_dev->channels) {
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dev_err(&pdev->dev, "failed to duplicate channels\n");
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return -ENOMEM;
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}
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ret = dev_rot_parse_report(pdev, hsdev,
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(struct iio_chan_spec *)indio_dev->channels,
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hsdev->usage, rot_state);
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if (ret) {
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dev_err(&pdev->dev, "failed to setup attributes\n");
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return ret;
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}
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indio_dev->num_channels = ARRAY_SIZE(dev_rot_channels);
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indio_dev->info = &dev_rot_info;
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indio_dev->name = name;
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indio_dev->modes = INDIO_DIRECT_MODE;
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atomic_set(&rot_state->common_attributes.data_ready, 0);
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ret = hid_sensor_setup_trigger(indio_dev, name,
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&rot_state->common_attributes);
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if (ret) {
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dev_err(&pdev->dev, "trigger setup failed\n");
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return ret;
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}
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ret = iio_device_register(indio_dev);
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if (ret) {
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dev_err(&pdev->dev, "device register failed\n");
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goto error_remove_trigger;
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}
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rot_state->callbacks.send_event = dev_rot_proc_event;
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rot_state->callbacks.capture_sample = dev_rot_capture_sample;
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rot_state->callbacks.pdev = pdev;
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ret = sensor_hub_register_callback(hsdev, hsdev->usage,
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&rot_state->callbacks);
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if (ret) {
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dev_err(&pdev->dev, "callback reg failed\n");
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goto error_iio_unreg;
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}
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return 0;
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error_iio_unreg:
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iio_device_unregister(indio_dev);
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error_remove_trigger:
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hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);
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return ret;
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}
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/* Function to deinitialize the processing for usage id */
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static int hid_dev_rot_remove(struct platform_device *pdev)
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{
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struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
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struct iio_dev *indio_dev = platform_get_drvdata(pdev);
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struct dev_rot_state *rot_state = iio_priv(indio_dev);
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sensor_hub_remove_callback(hsdev, hsdev->usage);
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iio_device_unregister(indio_dev);
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hid_sensor_remove_trigger(indio_dev, &rot_state->common_attributes);
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return 0;
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}
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static const struct platform_device_id hid_dev_rot_ids[] = {
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{
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/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
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.name = "HID-SENSOR-20008a",
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},
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{
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/* Relative orientation(AG) sensor */
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.name = "HID-SENSOR-20008e",
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},
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{
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/* Geomagnetic orientation(AM) sensor */
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.name = "HID-SENSOR-2000c1",
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},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids);
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static struct platform_driver hid_dev_rot_platform_driver = {
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.id_table = hid_dev_rot_ids,
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.driver = {
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.name = KBUILD_MODNAME,
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.pm = &hid_sensor_pm_ops,
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},
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.probe = hid_dev_rot_probe,
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.remove = hid_dev_rot_remove,
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};
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module_platform_driver(hid_dev_rot_platform_driver);
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MODULE_DESCRIPTION("HID Sensor Device Rotation");
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MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
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MODULE_LICENSE("GPL");
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