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