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external: control the board using external program
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 <[email protected]>
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4 files changed

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‎device.h‎

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@@ -90,6 +90,7 @@ extern const struct control_ops alpaca_ops;
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extern const struct control_ops cdb_assist_ops;
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extern const struct control_ops conmux_ops;
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extern const struct control_ops ftdi_gpio_ops;
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extern const struct control_ops external_ops;
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extern const struct control_ops qcomlt_dbg_ops;
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extern const struct console_ops conmux_console_ops;

‎device_parser.c‎

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@@ -147,6 +147,9 @@ static void parse_board(struct device_parser *dp)
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} else if (!strcmp(key, "ftdi_gpio")) {
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dev->control_dev = strdup(value);
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set_control_ops(dev, &ftdi_gpio_ops);
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} else if (!strcmp(key, "external")) {
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dev->control_dev = strdup(value);
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set_control_ops(dev, &external_ops);
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} else if (!strcmp(key, "qcomlt_debug_board")) {
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dev->control_dev = strdup(value);
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set_control_ops(dev, &qcomlt_dbg_ops);

‎external.c‎

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@@ -0,0 +1,125 @@
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/*
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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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};

‎meson.build‎

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@@ -61,6 +61,7 @@ server_srcs = ['cdba-server.c',
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'conmux.c',
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'device.c',
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'device_parser.c',
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'external.c',
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'fastboot.c',
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'alpaca.c',
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'ftdi-gpio.c',

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