| /* |
| * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #include <linux/iio/common/ssp_sensors.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(ssp_common_buffer_postenable); |
| |
| /** |
| * 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(ssp_common_buffer_postdisable); |
| |
| /** |
| * 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; |
| 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(ssp_common_process_data); |
| |
| MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>"); |
| MODULE_DESCRIPTION("Samsung sensorhub commons"); |
| MODULE_LICENSE("GPL"); |