111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/*
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* Copyright (C) 2020, Samsung Electronics Co. Ltd. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/miscdevice.h>
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#include <linux/uaccess.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include "../../debug/shub_system_checker.h"
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#include "../../utility/shub_utility.h"
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#include "../../sensormanager/shub_sensor_manager.h"
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#include "../../sensormanager/shub_sensor_type.h"
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struct miscdevice batch_io_device;
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struct batch_config {
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int64_t timeout;
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int64_t delay;
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int flag;
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};
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#define BATCH_IOCTL_MAGIC 0xFC
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static long shub_batch_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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struct batch_config batch;
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void __user *argp = (void __user *)arg;
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int retries = 2;
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int ret;
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int sensor_type;
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int sampling_period_ms, report_latency_ms = 0;
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sensor_type = (cmd & 0xFF);
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shub_infof("cmd = 0x%x, sensor_type = %d", cmd, sensor_type);
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if ((cmd >> 8 & 0xFF) != BATCH_IOCTL_MAGIC) {
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shub_err("Invalid BATCH CMD %x", cmd);
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return -EINVAL;
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}
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if (sensor_type >= SENSOR_TYPE_LEGACY_MAX) {
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shub_err("Invalid sensor_type %d", sensor_type);
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return -EINVAL;
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}
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while (retries--) {
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ret = copy_from_user(&batch, argp, sizeof(batch));
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if (likely(!ret)) {
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break;
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}
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}
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if (unlikely(ret)) {
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shub_err("batch ioctl err(%d)", ret);
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return -EINVAL;
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}
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sampling_period_ms = div_s64(batch.delay, NSEC_PER_MSEC);
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report_latency_ms = div_s64(batch.timeout, NSEC_PER_MSEC);
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#ifdef CONFIG_SHUB_DEBUG
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if (is_system_checking())
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return -EINVAL;
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#endif
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ret = batch_sensor(sensor_type, sampling_period_ms, report_latency_ms);
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return ret;
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}
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static struct file_operations shub_batch_fops = {
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.owner = THIS_MODULE,
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.open = nonseekable_open,
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.unlocked_ioctl = shub_batch_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = shub_batch_ioctl,
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#endif
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};
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int register_misc_dev_batch(bool en)
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{
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int res = 0;
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if (en) {
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batch_io_device.minor = MISC_DYNAMIC_MINOR;
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batch_io_device.name = "batch_io";
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batch_io_device.fops = &shub_batch_fops;
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res = misc_register(&batch_io_device);
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} else {
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shub_batch_fops.unlocked_ioctl = NULL;
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#ifdef CONFIG_COMPAT
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shub_batch_fops.compat_ioctl = NULL;
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#endif
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misc_deregister(&batch_io_device);
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}
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return res;
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} |