mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
2.6 KiB
99 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. |
|
*/ |
|
|
|
#include <linux/iio/common/ssp_sensors.h> |
|
#include <linux/iio/buffer.h> |
|
#include <linux/iio/kfifo_buf.h> |
|
#include <linux/module.h> |
|
#include <linux/slab.h> |
|
#include "ssp_iio_sensor.h" |
|
|
|
/** |
|
* ssp_common_buffer_postenable() - generic postenable callback for ssp buffer |
|
* |
|
* @indio_dev: iio device |
|
* |
|
* Returns 0 or negative value in case of error |
|
*/ |
|
int ssp_common_buffer_postenable(struct iio_dev *indio_dev) |
|
{ |
|
struct ssp_sensor_data *spd = iio_priv(indio_dev); |
|
struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); |
|
|
|
/* the allocation is made in post because scan size is known in this |
|
* moment |
|
* */ |
|
spd->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL | GFP_DMA); |
|
if (!spd->buffer) |
|
return -ENOMEM; |
|
|
|
return ssp_enable_sensor(data, spd->type, |
|
ssp_get_sensor_delay(data, spd->type)); |
|
} |
|
EXPORT_SYMBOL_NS(ssp_common_buffer_postenable, IIO_SSP_SENSORS); |
|
|
|
/** |
|
* ssp_common_buffer_postdisable() - generic postdisable callback for ssp buffer |
|
* |
|
* @indio_dev: iio device |
|
* |
|
* Returns 0 or negative value in case of error |
|
*/ |
|
int ssp_common_buffer_postdisable(struct iio_dev *indio_dev) |
|
{ |
|
int ret; |
|
struct ssp_sensor_data *spd = iio_priv(indio_dev); |
|
struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent); |
|
|
|
ret = ssp_disable_sensor(data, spd->type); |
|
if (ret < 0) |
|
return ret; |
|
|
|
kfree(spd->buffer); |
|
|
|
return ret; |
|
} |
|
EXPORT_SYMBOL_NS(ssp_common_buffer_postdisable, IIO_SSP_SENSORS); |
|
|
|
/** |
|
* ssp_common_process_data() - Common process data callback for ssp sensors |
|
* |
|
* @indio_dev: iio device |
|
* @buf: source buffer |
|
* @len: sensor data length |
|
* @timestamp: system timestamp |
|
* |
|
* Returns 0 or negative value in case of error |
|
*/ |
|
int ssp_common_process_data(struct iio_dev *indio_dev, void *buf, |
|
unsigned int len, int64_t timestamp) |
|
{ |
|
__le32 time; |
|
int64_t calculated_time = 0; |
|
struct ssp_sensor_data *spd = iio_priv(indio_dev); |
|
|
|
if (indio_dev->scan_bytes == 0) |
|
return 0; |
|
|
|
/* |
|
* it always sends full set of samples, remember about available masks |
|
*/ |
|
memcpy(spd->buffer, buf, len); |
|
|
|
if (indio_dev->scan_timestamp) { |
|
memcpy(&time, &((char *)buf)[len], SSP_TIME_SIZE); |
|
calculated_time = |
|
timestamp + (int64_t)le32_to_cpu(time) * 1000000; |
|
} |
|
|
|
return iio_push_to_buffers_with_timestamp(indio_dev, spd->buffer, |
|
calculated_time); |
|
} |
|
EXPORT_SYMBOL_NS(ssp_common_process_data, IIO_SSP_SENSORS); |
|
|
|
MODULE_AUTHOR("Karol Wrona <[email protected]>"); |
|
MODULE_DESCRIPTION("Samsung sensorhub commons"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_IMPORT_NS(IIO_SSP_SENSORS);
|
|
|