CDev.cpp

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/**
 * @file CDev.cpp
 *
 * Character device base class.
 */

#include "CDev.hpp"

#include <cstring>

#include <px4_platform_common/posix.h>
#include <drivers/drv_device.h>

namespace device
{

CDev::CDev(const char *name, const char *devname) :
    Device(name),
    cdev::CDev(devname)
{
}

int
CDev::init()
{
    DEVICE_DEBUG("CDev::init");

    // base class init first
    int ret = Device::init();

    if (ret != PX4_OK) {
        goto out;
    }

    // now register the driver
    if (get_devname() != nullptr) {
        ret = cdev::CDev::init();

        if (ret != PX4_OK) {
            goto out;
        }
    }

out:
    return ret;
}

int
CDev::ioctl(file_t *filep, int cmd, unsigned long arg)
{
    DEVICE_DEBUG("CDev::ioctl");
    int ret = -ENOTTY;

    switch (cmd) {

    /* fetch a pointer to the driver's private data */
    case DIOC_GETPRIV:
        *(void **)(uintptr_t)arg = (void *)this;
        ret = PX4_OK;
        break;

    case DEVIOCSPUBBLOCK:
        _pub_blocked = (arg != 0);
        ret = PX4_OK;
        break;

    case DEVIOCGPUBBLOCK:
        ret = _pub_blocked;
        break;

    case DEVIOCGDEVICEID:
        ret = (int)_device_id.devid;
        break;

    default:
        break;
    }

    return ret;
}

} // namespace device