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/*
* This file is part of libsamsung-ipc.
*
* Copyright (C) 2012 Alexander Tarasikov <alexander.tarasikov@gmail.com>
* Copyright (C) 2013-2014 Paul Kocialkowski <contact@paulk.fr>
*
* Based on the incomplete C++ implementation which is:
* Copyright (C) 2012 Sergey Gridasov <grindars@gmail.com>
*
* libsamsung-ipc is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* libsamsung-ipc is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libsamsung-ipc. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/select.h>
#include <samsung-ipc.h>
#include "../xmm626/xmm626.h"
#include "../xmm626/xmm626_hsic.h"
int generic_xmm626_hsic_command_send(__attribute__((unused)) void *transport_data,
int device_fd, unsigned short code,
const void *data, size_t size,
size_t command_data_size, int ack)
{
struct xmm626_hsic_command_header header;
void *buffer = NULL;
size_t length;
struct timeval timeout;
fd_set fds;
unsigned char *p;
int rc;
int i;
if (device_fd < 0 || data == NULL || size == 0 || command_data_size == 0 || command_data_size < size)
return -1;
header.checksum = (size & 0xffff) + code;
header.code = code;
header.data_size = size;
p = (unsigned char *) data;
for (i = 0; i < (int) size; i++)
header.checksum += *p++;
length = command_data_size + sizeof(header);
buffer = calloc(1, length);
memset(buffer, 0, length);
p = (unsigned char *) buffer;
memcpy(p, &header, sizeof(header));
p += sizeof(header);
memcpy(p, data, size);
rc = write(device_fd, buffer, length);
if (rc < (int) length)
goto error;
if (!ack) {
rc = 0;
goto complete;
}
memset(buffer, 0, length);
FD_ZERO(&fds);
FD_SET(device_fd, &fds);
timeout.tv_sec = 1;
timeout.tv_usec = 0;
rc = select(device_fd + 1, &fds, NULL, NULL, &timeout);
if (rc <= 0)
goto error;
rc = read(device_fd, &header, sizeof(header));
if (rc < (int) sizeof(header)) {
printf("got no header\n");
goto error;
}
rc = select(device_fd + 1, &fds, NULL, NULL, &timeout);
if (rc <= 0) {
printf("select failed\n");
goto error;
}
rc = read(device_fd, buffer, command_data_size);
if (rc < (int) command_data_size) {
printf("not enough read\n");
goto error;
}
if (header.code != code) {
printf("header code mismatch");
goto error;
}
rc = 0;
goto complete;
error:
rc = -1;
complete:
if (buffer != NULL)
free(buffer);
return rc;
}
// vim:ts=4:sw=4:expandtab
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