blob: 36c909ce5eb93d336a7f751d2bb4072d6e179bb5 [file] [log] [blame]
/*
* libraw1394 - library for raw access to the 1394 bus with the Linux subsystem.
*
* Copyright (C) 1999,2000,2001,2002 Andreas Bombe
*
* This library is licensed under the GNU Lesser General Public License (LGPL),
* version 2.1 or later. See the file COPYING.LIB in the distribution for
* details.
*/
#include <config.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include "raw1394.h"
#include "kernel-raw1394.h"
#include "raw1394_private.h"
static int do_fcp_listen(struct raw1394_handle *handle, int startstop)
{
ieee1394handle_t ihandle = handle->mode.ieee1394;
struct sync_cb_data sd = { 0, 0 };
struct raw1394_reqhandle rh = { (req_callback_t)_raw1394_sync_cb, &sd };
int err;
struct raw1394_request req;
CLEAR_REQ(&req);
req.type = RAW1394_REQ_FCP_LISTEN;
req.generation = ihandle->generation;
req.misc = startstop;
req.tag = ptr2int(&rh);
req.recvb = ptr2int(ihandle->buffer);
req.length = 512;
err = write(ihandle->fd, &req, sizeof(req));
while (!sd.done) {
if (err < 0) return err;
err = ieee1394_loop_iterate(handle);
}
switch (sd.errcode) {
case RAW1394_ERROR_ALREADY:
errno = EALREADY;
return -1;
case RAW1394_ERROR_INVALID_ARG:
errno = EINVAL;
return -1;
default:
errno = 0;
return sd.errcode;
}
}
int ieee1394_start_fcp_listen(struct raw1394_handle *handle)
{
return do_fcp_listen(handle, 1);
}
int ieee1394_stop_fcp_listen(struct raw1394_handle *handle)
{
return do_fcp_listen(handle, 0);
}