1 /*
2 * Copyright (c) 2013 Corey Tabaka
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files
6 * (the "Software"), to deal in the Software without restriction,
7 * including without limitation the rights to use, copy, modify, merge,
8 * publish, distribute, sublicense, and/or sell copies of the Software,
9 * and to permit persons to whom the Software is furnished to do so,
10 * subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 #include <err.h>
25 #include <dev/class/uart.h>
26
class_uart_read(struct device * dev,void * buf,size_t len)27 ssize_t class_uart_read(struct device *dev, void *buf, size_t len)
28 {
29 struct uart_ops *ops = device_get_driver_ops(dev, struct uart_ops, std);
30
31 if (!ops)
32 return ERR_NOT_CONFIGURED;
33
34 if (ops->read)
35 return ops->read(dev, buf, len);
36 else
37 return ERR_NOT_SUPPORTED;
38 }
39
class_uart_write(struct device * dev,const void * buf,size_t len)40 ssize_t class_uart_write(struct device *dev, const void *buf, size_t len)
41 {
42 struct uart_ops *ops = device_get_driver_ops(dev, struct uart_ops, std);
43
44 if (!ops)
45 return ERR_NOT_CONFIGURED;
46
47 if (ops->write)
48 return ops->write(dev, buf, len);
49 else
50 return ERR_NOT_SUPPORTED;
51 }
52
53