/*
* Copyright (c) 2000 Tatoku Ogaito. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Tatoku Ogaito
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
size_t
cs428x_round_buffersize(void *addr, int direction,
size_t size)
{
/* The real DMA buffersize are 4KB for CS4280
* and 64kB/MAX_CHANNELS for CS4281.
* But they are too small for high quality audio,
* let the upper layer(audio) use a larger buffer.
* (originally suggested by Lennart Augustsson.)
*/
return size;
}
int
cs428x_read_codec(void *addr, uint8_t ac97_addr, uint16_t *ac97_data)
{
struct cs428x_softc *sc;
uint32_t acctl;
int n;
sc = addr;
DPRINTFN(5,("read_codec: add=0x%02x ", ac97_addr));
/*
* Make sure that there is not data sitting around from a previous
* uncompleted access.
*/
BA0READ4(sc, CS428X_ACSDA);
/* Set up AC97 control registers. */
BA0WRITE4(sc, CS428X_ACCAD, ac97_addr);
BA0WRITE4(sc, CS428X_ACCDA, 0);