Subversion Repositories ao486

/******************************************************************************

*                                                                             *

* License Agreement                                                           *

*                                                                             *

* Copyright (c) 2004 Altera Corporation, San Jose, California, USA.           *

* All rights reserved.                                                        *

*                                                                             *

* Permission is hereby granted, free of charge, to any person obtaining a     *

* copy of this software and associated documentation files (the "Software"),  *

* to deal in the Software without restriction, including without limitation   *

* the rights to use, copy, modify, merge, publish, distribute, sublicense,    *

* and/or sell copies of the Software, and to permit persons to whom the       *

* Software is furnished to do so, subject to the following conditions:        *

*                                                                             *

* The above copyright notice and this permission notice shall be included in  *

* all copies or substantial portions of the Software.                         *

*                                                                             *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  *

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,    *

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      *

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING     *

* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER         *

* DEALINGS IN THE SOFTWARE.                                                   *

*                                                                             *

* This agreement shall be governed in all respects by the laws of the State   *

* of California and by the laws of the United States of America.              *

*                                                                             *

* Altera does not recommend, suggest or require that this reference design    *

* file be used in conjunction or combination with any other product.          *

******************************************************************************/

#include "sys/alt_dma.h"

#include "sys/alt_errno.h"

#include "priv/alt_file.h"

/*

 * The list of registered DMA receive channels.

 */

ALT_LLIST_HEAD(alt_dma_rxchan_list);

/*

 * alt_dma_txchan_open() is used to obtain an "alt_dma_txchan" descriptor for

 * a DMA transmit device. The name is the name of the associated physical

 * device (e.g. "/dev/dma_0").

 *

 * The return value will be NULL on failure, and non-NULL otherwise.

 */

alt_dma_rxchan alt_dma_rxchan_open (const char* name)

{

  alt_dma_rxchan dev;

  dev = (alt_dma_rxchan) alt_find_dev (name, &alt_dma_rxchan_list);

  if (!dev)

  {

    ALT_ERRNO = ENODEV;

  }

  return dev;

}