linux-zen-desktop/drivers/iio/orientation/hid-sensor-incl-3d.c

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2023-08-30 17:31:07 +02:00
// 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);