#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];
aligned_s64 timestamp;
} 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),
};
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)
};
static void hinge_adjust_channel_realbits(struct iio_chan_spec *channels,
int channel, int size)
{
channels[channel].scan_type.realbits = size * 8;
}
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;
}
}
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 sysfs_emit(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,
};
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;
}
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;
}
}
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;
}
static int hid_hinge_probe(struct platform_device *pdev)
{
struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
struct hinge_state *st;
struct iio_dev *indio_dev;
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;
}
static void hid_hinge_remove(struct platform_device *pdev)
{
struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
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);
}
static const struct platform_device_id hid_hinge_ids[] = {
{
.name = "HID-SENSOR-INT-020b",
},
{ }
};
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");
