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https://github.com/linux-msm/cdba.git
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3b089f313e
Separate backend operations into control and console operations. Main idea is that each device has single set of console ops (conmux or console) and at most one way to control it. Each backend driver exports a structure with the set of callbacks. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*
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* Copyright (c) 2020, Linaro Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "cdba-server.h"
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#include "device.h"
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struct console {
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int console_fd;
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struct termios console_tios;
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};
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static int console_data(int fd, void *data)
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{
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char buf[128];
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ssize_t n;
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n = read(fd, buf, sizeof(buf));
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if (n < 0)
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return n;
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cdba_send_buf(MSG_CONSOLE, n, buf);
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return 0;
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}
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void *console_open(struct device *device)
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{
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struct console *console;
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console = calloc(1, sizeof(*console));
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console->console_fd = tty_open(device->console_dev, &console->console_tios);
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if (console->console_fd < 0)
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err(1, "failed to open %s", device->console_dev);
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watch_add_readfd(console->console_fd, console_data, device);
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return console;
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}
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int console_write(struct device *device, const void *buf, size_t len)
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{
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struct console *console = device->console;
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return write(console->console_fd, buf, len);;
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}
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void console_send_break(struct device *device)
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{
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struct console *console = device->console;
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tcsendbreak(console->console_fd, 0);
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}
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const struct console_ops console_ops = {
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.open = console_open,
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.write = console_write,
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.send_break = console_send_break,
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};
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