382 lines
10 KiB
C
382 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* HID Sensors Driver
|
|
* Copyright (c) 2020, Intel Corporation.
|
|
*/
|
|
#include <linux/hid-sensor-hub.h>
|
|
#include <linux/iio/buffer.h>
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
|
|
#include "../common/hid-sensors/hid-sensor-trigger.h"
|
|
|
|
enum hinge_channel {
|
|
CHANNEL_SCAN_INDEX_HINGE_ANGLE,
|
|
CHANNEL_SCAN_INDEX_SCREEN_ANGLE,
|
|
CHANNEL_SCAN_INDEX_KEYBOARD_ANGLE,
|
|
CHANNEL_SCAN_INDEX_MAX,
|
|
};
|
|
|
|
#define CHANNEL_SCAN_INDEX_TIMESTAMP CHANNEL_SCAN_INDEX_MAX
|
|
|
|
static const u32 hinge_addresses[CHANNEL_SCAN_INDEX_MAX] = {
|
|
HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1),
|
|
HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(2),
|
|
HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(3)
|
|
};
|
|
|
|
static const char *const hinge_labels[CHANNEL_SCAN_INDEX_MAX] = { "hinge",
|
|
"screen",
|
|
"keyboard" };
|
|
|
|
struct hinge_state {
|
|
struct iio_dev *indio_dev;
|
|
struct hid_sensor_hub_attribute_info hinge[CHANNEL_SCAN_INDEX_MAX];
|
|
struct hid_sensor_hub_callbacks callbacks;
|
|
struct hid_sensor_common common_attributes;
|
|
const char *labels[CHANNEL_SCAN_INDEX_MAX];
|
|
struct {
|
|
u32 hinge_val[3];
|
|
u64 timestamp __aligned(8);
|
|
} scan;
|
|
|
|
int scale_pre_decml;
|
|
int scale_post_decml;
|
|
int scale_precision;
|
|
int value_offset;
|
|
u64 timestamp;
|
|
};
|
|
|
|
static const u32 hinge_sensitivity_addresses[] = {
|
|
HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1),
|
|
};
|
|
|
|
/* Channel definitions */
|
|
static const struct iio_chan_spec hinge_channels[] = {
|
|
{
|
|
.type = IIO_ANGL,
|
|
.indexed = 1,
|
|
.channel = 0,
|
|
.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_HINGE_ANGLE,
|
|
.scan_type = {
|
|
.sign = 's',
|
|
.storagebits = 32,
|
|
},
|
|
}, {
|
|
.type = IIO_ANGL,
|
|
.indexed = 1,
|
|
.channel = 1,
|
|
.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_SCREEN_ANGLE,
|
|
.scan_type = {
|
|
.sign = 's',
|
|
.storagebits = 32,
|
|
},
|
|
}, {
|
|
.type = IIO_ANGL,
|
|
.indexed = 1,
|
|
.channel = 2,
|
|
.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_KEYBOARD_ANGLE,
|
|
.scan_type = {
|
|
.sign = 's',
|
|
.storagebits = 32,
|
|
},
|
|
},
|
|
IIO_CHAN_SOFT_TIMESTAMP(CHANNEL_SCAN_INDEX_TIMESTAMP)
|
|
};
|
|
|
|
/* Adjust channel real bits based on report descriptor */
|
|
static void hinge_adjust_channel_realbits(struct iio_chan_spec *channels,
|
|
int channel, int size)
|
|
{
|
|
channels[channel].scan_type.realbits = size * 8;
|
|
}
|
|
|
|
/* Channel read_raw handler */
|
|
static int hinge_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, int *val, int *val2,
|
|
long mask)
|
|
{
|
|
struct hinge_state *st = iio_priv(indio_dev);
|
|
struct hid_sensor_hub_device *hsdev;
|
|
int report_id;
|
|
s32 min;
|
|
|
|
hsdev = st->common_attributes.hsdev;
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
hid_sensor_power_state(&st->common_attributes, true);
|
|
report_id = st->hinge[chan->scan_index].report_id;
|
|
min = st->hinge[chan->scan_index].logical_minimum;
|
|
if (report_id < 0) {
|
|
hid_sensor_power_state(&st->common_attributes, false);
|
|
return -EINVAL;
|
|
}
|
|
|
|
*val = sensor_hub_input_attr_get_raw_value(st->common_attributes.hsdev,
|
|
hsdev->usage,
|
|
hinge_addresses[chan->scan_index],
|
|
report_id,
|
|
SENSOR_HUB_SYNC, min < 0);
|
|
|
|
hid_sensor_power_state(&st->common_attributes, false);
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_SCALE:
|
|
*val = st->scale_pre_decml;
|
|
*val2 = st->scale_post_decml;
|
|
return st->scale_precision;
|
|
case IIO_CHAN_INFO_OFFSET:
|
|
*val = st->value_offset;
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
return hid_sensor_read_samp_freq_value(&st->common_attributes,
|
|
val, val2);
|
|
case IIO_CHAN_INFO_HYSTERESIS:
|
|
return hid_sensor_read_raw_hyst_value(&st->common_attributes,
|
|
val, val2);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Channel write_raw handler */
|
|
static int hinge_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, int val, int val2,
|
|
long mask)
|
|
{
|
|
struct hinge_state *st = iio_priv(indio_dev);
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
return hid_sensor_write_samp_freq_value(&st->common_attributes,
|
|
val, val2);
|
|
case IIO_CHAN_INFO_HYSTERESIS:
|
|
return hid_sensor_write_raw_hyst_value(&st->common_attributes,
|
|
val, val2);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int hinge_read_label(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, char *label)
|
|
{
|
|
struct hinge_state *st = iio_priv(indio_dev);
|
|
|
|
return sprintf(label, "%s\n", st->labels[chan->channel]);
|
|
}
|
|
|
|
static const struct iio_info hinge_info = {
|
|
.read_raw = hinge_read_raw,
|
|
.write_raw = hinge_write_raw,
|
|
.read_label = hinge_read_label,
|
|
};
|
|
|
|
/*
|
|
* Callback handler to send event after all samples are received
|
|
* and captured.
|
|
*/
|
|
static int hinge_proc_event(struct hid_sensor_hub_device *hsdev,
|
|
unsigned int usage_id, void *priv)
|
|
{
|
|
struct iio_dev *indio_dev = platform_get_drvdata(priv);
|
|
struct hinge_state *st = iio_priv(indio_dev);
|
|
|
|
if (atomic_read(&st->common_attributes.data_ready)) {
|
|
if (!st->timestamp)
|
|
st->timestamp = iio_get_time_ns(indio_dev);
|
|
|
|
iio_push_to_buffers_with_timestamp(indio_dev, &st->scan,
|
|
st->timestamp);
|
|
|
|
st->timestamp = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Capture samples in local storage */
|
|
static int hinge_capture_sample(struct hid_sensor_hub_device *hsdev,
|
|
unsigned int usage_id, size_t raw_len,
|
|
char *raw_data, void *priv)
|
|
{
|
|
struct iio_dev *indio_dev = platform_get_drvdata(priv);
|
|
struct hinge_state *st = iio_priv(indio_dev);
|
|
int offset;
|
|
|
|
switch (usage_id) {
|
|
case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1):
|
|
case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(2):
|
|
case HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(3):
|
|
offset = usage_id - HID_USAGE_SENSOR_DATA_FIELD_CUSTOM_VALUE(1);
|
|
st->scan.hinge_val[offset] = *(u32 *)raw_data;
|
|
return 0;
|
|
case HID_USAGE_SENSOR_TIME_TIMESTAMP:
|
|
st->timestamp = hid_sensor_convert_timestamp(&st->common_attributes,
|
|
*(int64_t *)raw_data);
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Parse report which is specific to an usage id */
|
|
static int hinge_parse_report(struct platform_device *pdev,
|
|
struct hid_sensor_hub_device *hsdev,
|
|
struct iio_chan_spec *channels,
|
|
unsigned int usage_id, struct hinge_state *st)
|
|
{
|
|
int ret;
|
|
int i;
|
|
|
|
for (i = 0; i < CHANNEL_SCAN_INDEX_MAX; ++i) {
|
|
ret = sensor_hub_input_get_attribute_info(hsdev,
|
|
HID_INPUT_REPORT,
|
|
usage_id,
|
|
hinge_addresses[i],
|
|
&st->hinge[i]);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
hinge_adjust_channel_realbits(channels, i, st->hinge[i].size);
|
|
}
|
|
|
|
st->scale_precision = hid_sensor_format_scale(HID_USAGE_SENSOR_HINGE,
|
|
&st->hinge[CHANNEL_SCAN_INDEX_HINGE_ANGLE],
|
|
&st->scale_pre_decml, &st->scale_post_decml);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Function to initialize the processing for usage id */
|
|
static int hid_hinge_probe(struct platform_device *pdev)
|
|
{
|
|
struct hinge_state *st;
|
|
struct iio_dev *indio_dev;
|
|
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
|
|
int ret;
|
|
int i;
|
|
|
|
indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*st));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, indio_dev);
|
|
|
|
st = iio_priv(indio_dev);
|
|
st->common_attributes.hsdev = hsdev;
|
|
st->common_attributes.pdev = pdev;
|
|
st->indio_dev = indio_dev;
|
|
for (i = 0; i < CHANNEL_SCAN_INDEX_MAX; i++)
|
|
st->labels[i] = hinge_labels[i];
|
|
|
|
ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage,
|
|
&st->common_attributes,
|
|
hinge_sensitivity_addresses,
|
|
ARRAY_SIZE(hinge_sensitivity_addresses));
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to setup common attributes\n");
|
|
return ret;
|
|
}
|
|
|
|
indio_dev->num_channels = ARRAY_SIZE(hinge_channels);
|
|
indio_dev->channels = devm_kmemdup(&indio_dev->dev, hinge_channels,
|
|
sizeof(hinge_channels), GFP_KERNEL);
|
|
if (!indio_dev->channels)
|
|
return -ENOMEM;
|
|
|
|
ret = hinge_parse_report(pdev, hsdev,
|
|
(struct iio_chan_spec *)indio_dev->channels,
|
|
hsdev->usage, st);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to setup attributes\n");
|
|
return ret;
|
|
}
|
|
|
|
indio_dev->info = &hinge_info;
|
|
indio_dev->name = "hinge";
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
atomic_set(&st->common_attributes.data_ready, 0);
|
|
ret = hid_sensor_setup_trigger(indio_dev, indio_dev->name,
|
|
&st->common_attributes);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "trigger setup failed\n");
|
|
return ret;
|
|
}
|
|
|
|
st->callbacks.send_event = hinge_proc_event;
|
|
st->callbacks.capture_sample = hinge_capture_sample;
|
|
st->callbacks.pdev = pdev;
|
|
ret = sensor_hub_register_callback(hsdev, hsdev->usage, &st->callbacks);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "callback reg failed\n");
|
|
goto error_remove_trigger;
|
|
}
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "device register failed\n");
|
|
goto error_remove_callback;
|
|
}
|
|
|
|
return ret;
|
|
|
|
error_remove_callback:
|
|
sensor_hub_remove_callback(hsdev, hsdev->usage);
|
|
error_remove_trigger:
|
|
hid_sensor_remove_trigger(indio_dev, &st->common_attributes);
|
|
return ret;
|
|
}
|
|
|
|
/* Function to deinitialize the processing for usage id */
|
|
static int hid_hinge_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 hinge_state *st = iio_priv(indio_dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
sensor_hub_remove_callback(hsdev, hsdev->usage);
|
|
hid_sensor_remove_trigger(indio_dev, &st->common_attributes);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id hid_hinge_ids[] = {
|
|
{
|
|
/* Format: HID-SENSOR-INT-usage_id_in_hex_lowercase */
|
|
.name = "HID-SENSOR-INT-020b",
|
|
},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, hid_hinge_ids);
|
|
|
|
static struct platform_driver hid_hinge_platform_driver = {
|
|
.id_table = hid_hinge_ids,
|
|
.driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.pm = &hid_sensor_pm_ops,
|
|
},
|
|
.probe = hid_hinge_probe,
|
|
.remove = hid_hinge_remove,
|
|
};
|
|
module_platform_driver(hid_hinge_platform_driver);
|
|
|
|
MODULE_DESCRIPTION("HID Sensor INTEL Hinge");
|
|
MODULE_AUTHOR("Ye Xiang <xiang.ye@intel.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_IMPORT_NS(IIO_HID);
|