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310004badb
Control the board using external program. It will be called with 3 arguments: <board> <command> <on/off>, where command is one of "power", "usb", "key-fastboot", "key-power". Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/*
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* Copyright (c) 2021-2023, 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/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdlib.h>
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#include "cdba-server.h"
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#include "device.h"
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struct external {
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const char *path;
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const char *board;
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};
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static int external_helper(struct external *ext, const char *command, bool on)
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{
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pid_t pid, pid_ret;
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int status;
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pid = fork();
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switch (pid) {
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case 0:
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/* Do not clobber stdout with program messages or cdba will become confused */
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dup2(2, 1);
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return execlp(ext->path, ext->path, ext->board, command, on ? "on": "off", NULL);
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case -1:
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return -1;
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default:
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break;
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}
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pid_ret = waitpid(pid, &status, 0);
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if (pid_ret < 0)
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return pid_ret;
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if (WIFEXITED(status))
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return WEXITSTATUS(status);
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else if (WIFSIGNALED(status))
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errno = -EINTR;
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else
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errno = -EIO;
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return -1;
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}
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static void *external_open(struct device *dev)
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{
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struct external *ext;
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dev->has_power_key = true;
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ext = calloc(1, sizeof(*ext));
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ext->path = dev->control_dev;
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ext->board = dev->board;
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return ext;
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}
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static int external_power(struct device *dev, bool on)
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{
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struct external *ext = dev->cdb;
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return external_helper(ext, "power", on);
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}
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static void external_usb(struct device *dev, bool on)
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{
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struct external *ext = dev->cdb;
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external_helper(ext, "usb", on);
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}
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static void external_key(struct device *dev, int key, bool asserted)
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{
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struct external *ext = dev->cdb;
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switch (key) {
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case DEVICE_KEY_FASTBOOT:
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external_helper(ext, "key-fastboot", asserted);
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break;
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case DEVICE_KEY_POWER:
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external_helper(ext, "key-power", asserted);
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break;
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}
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}
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const struct control_ops external_ops = {
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.open = external_open,
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.power = external_power,
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.usb = external_usb,
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.key = external_key,
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};
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