dev/class/uart_api.c

/*
 * Copyright (c) 2013 Corey Tabaka
 *
 * Use of this source code is governed by a MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT
 */

#include <lk/err.h>
#include <dev/class/uart.h>

ssize_t class_uart_read(struct device *dev, void *buf, size_t len) {
    struct uart_ops *ops = device_get_driver_ops(dev, struct uart_ops, std);

    if (!ops)
        return ERR_NOT_CONFIGURED;

    if (ops->read)
        return ops->read(dev, buf, len);
    else
        return ERR_NOT_SUPPORTED;
}

ssize_t class_uart_write(struct device *dev, const void *buf, size_t len) {
    struct uart_ops *ops = device_get_driver_ops(dev, struct uart_ops, std);

    if (!ops)
        return ERR_NOT_CONFIGURED;

    if (ops->write)
        return ops->write(dev, buf, len);
    else
        return ERR_NOT_SUPPORTED;
}