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/*
* Copyright (C) 2018 Knowles Electronics
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "ia_tunneling_hal"
#define LOG_NDEBUG 0
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <log/log.h>
#include <linux/mfd/adnc/iaxxx-tunnel-intf.h>
#include <linux/mfd/adnc/iaxxx-system-identifiers.h>
#include "tunnel.h"
#define TUNNELING_DEVICE "/dev/tunnel0"
#define FUNCTION_ENTRY_LOG ALOGV("Entering %s", __func__);
#define FUNCTION_EXIT_LOG ALOGV("Exiting %s", __func__);
struct ia_tunneling_hal {
int tunnel_dev;
};
struct ia_tunneling_hal* ia_start_tunneling(int buffering_size __unused)
{
struct ia_tunneling_hal *thdl;
FUNCTION_ENTRY_LOG;
thdl = (struct ia_tunneling_hal *)malloc(sizeof(struct ia_tunneling_hal));
if (thdl == NULL) {
ALOGE("%s: ERROR Failed to allocate memory of ia_tunneling_hal",
__func__);
return NULL;
}
thdl->tunnel_dev = open(TUNNELING_DEVICE, O_RDONLY);
if (-1 == thdl->tunnel_dev) {
ALOGE("%s: ERROR Failed to open the tunneling device - %s",
__func__, strerror(errno));
free(thdl);
return NULL;
}
return thdl;
}
int ia_stop_tunneling(struct ia_tunneling_hal *thdl)
{
FUNCTION_ENTRY_LOG;
if (thdl) {
close(thdl->tunnel_dev);
thdl->tunnel_dev = 0;
free(thdl);
}
return 0;
}
int ia_enable_tunneling_source(struct ia_tunneling_hal *thdl,
unsigned int src_id,
unsigned int tnl_mode,
unsigned int tnl_encode)
{
FUNCTION_ENTRY_LOG;
struct tunlMsg tm;
int err = 0;
if (thdl == NULL) {
ALOGE("%s: ERROR Tunneling hdl is NULL", __func__);
err = -EIO;
goto exit;
}
tm.tunlSrc = src_id;
tm.tunlMode = tnl_mode;
tm.tunlEncode = tnl_encode;
err = ioctl(thdl->tunnel_dev, TUNNEL_SETUP, &tm);
if (err == -1) {
ALOGE("%s: ERROR Tunnel setup failed %s", __func__, strerror(errno));
}
exit:
return err;
}
int ia_disable_tunneling_source(struct ia_tunneling_hal *thdl,
unsigned int src_id,
unsigned int tunl_mode,
unsigned int tunl_encode)
{
FUNCTION_ENTRY_LOG;
struct tunlMsg tm;
int err = 0;
if (thdl == NULL) {
ALOGE("%s: ERROR Tunneling hdl is NULL", __func__);
err = -EIO;
goto exit;
}
tm.tunlSrc = src_id;
tm.tunlMode = tunl_mode;
tm.tunlEncode = tunl_encode;
err = ioctl(thdl->tunnel_dev, TUNNEL_TERMINATE, &tm);
if (err == -1) {
ALOGE("%s: ERROR Tunnel terminate failed %s",
__func__, strerror(errno));
}
exit:
return err;
}
int ia_read_tunnel_data(struct ia_tunneling_hal *thdl,
void *buf,
int buf_sz)
{
int read_bytes;
if ((buf == NULL) || (buf_sz <= 0)) {
ALOGE("%s: ERROR Invalid buffer or buffer size", __func__);
return -EINVAL;
}
if (thdl == NULL) {
ALOGE("%s: ERROR Tunneling hdl is NULL", __func__);
return -EIO;
}
read_bytes = read(thdl->tunnel_dev, buf, buf_sz);
if (read_bytes == 0) {
ALOGE("%s: Warning zero bytes read from tunneling device, "
"trying again..", __func__);
}
return read_bytes;
}
int ia_set_tunnel_out_buf_threshold(struct ia_tunneling_hal *thdl,
uint32_t threshold)
{
int err;
FUNCTION_ENTRY_LOG;
if (thdl == NULL) {
ALOGE("%s: ERROR Tunneling hdl is NULL", __func__);
err = -EIO;
goto exit;
}
err = ioctl(thdl->tunnel_dev, TUNNEL_SET_EVENT_THRESHOLD,
threshold);
if (err == -1) {
ALOGE("%s: ERROR Tunnel terminate failed %s",
__func__, strerror(errno));
}
exit:
return err;
}
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