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/*
* linux/include/asm-arm/arch-omap/omap-alsa.h
*
* Alsa Driver for AIC23 and TSC2101 codecs on OMAP platform boards.
*
* Copyright (C) 2006 Mika Laitio <lamikr@cc.jyu.fi>
*
* Copyright (C) 2005 Instituto Nokia de Tecnologia - INdT - Manaus Brazil
* Written by Daniel Petrini, David Cohen, Anderson Briglia
* {daniel.petrini, david.cohen, anderson.briglia}@indt.org.br
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
* History
* -------
*
* 2005/07/25 INdT-10LE Kernel Team - Alsa driver for omap osk,
* original version based in sa1100 driver
* and omap oss driver.
*/
#ifndef __OMAP_ALSA_H
#define __OMAP_ALSA_H
#include <sound/driver.h>
#include <asm/arch/dma.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <asm/arch/mcbsp.h>
#include <linux/platform_device.h>
#define DMA_BUF_SIZE (1024 * 8)
/*
* Buffer management for alsa and dma
*/
struct audio_stream {
char *id; /* identification string */
int stream_id; /* numeric identification */
int dma_dev; /* dma number of that device */
int *lch; /* Chain of channels this stream is linked to */
char started; /* to store if the chain was started or not */
int dma_q_head; /* DMA Channel Q Head */
int dma_q_tail; /* DMA Channel Q Tail */
char dma_q_count; /* DMA Channel Q Count */
int active:1; /* we are using this stream for transfer now */
int period; /* current transfer period */
int periods; /* current count of periods registerd in the DMA engine */
spinlock_t dma_lock; /* for locking in DMA operations */
struct snd_pcm_substream *stream; /* the pcm stream */
unsigned linked:1; /* dma channels linked */
int offset; /* store start position of the last period in the alsa buffer */
int (*hw_start)(void); /* interface to start HW interface, e.g. McBSP */
int (*hw_stop)(void); /* interface to stop HW interface, e.g. McBSP */
};
/*
* Alsa card structure for aic23
*/
struct snd_card_omap_codec {
struct snd_card *card;
struct snd_pcm *pcm;
long samplerate;
struct audio_stream s[2]; /* playback & capture */
};
/* Codec specific information and function pointers.
* Codec (omap-alsa-aic23.c and omap-alsa-tsc2101.c)
* are responsible for defining the function pointers.
*/
struct omap_alsa_codec_config {
char *name;
struct omap_mcbsp_reg_cfg *mcbsp_regs_alsa;
struct snd_pcm_hw_constraint_list *hw_constraints_rates;
struct snd_pcm_hardware *snd_omap_alsa_playback;
struct snd_pcm_hardware *snd_omap_alsa_capture;
void (*codec_configure_dev)(void);
void (*codec_set_samplerate)(long);
void (*codec_clock_setup)(void);
int (*codec_clock_on)(void);
int (*codec_clock_off)(void);
int (*get_default_samplerate)(void);
};
/*********** Mixer function prototypes *************************/
int snd_omap_mixer(struct snd_card_omap_codec *);
void snd_omap_init_mixer(void);
#ifdef CONFIG_PM
void snd_omap_suspend_mixer(void);
void snd_omap_resume_mixer(void);
#endif
int snd_omap_alsa_post_probe(struct platform_device *pdev, struct omap_alsa_codec_config *config);
int snd_omap_alsa_remove(struct platform_device *pdev);
#ifdef CONFIG_PM
int snd_omap_alsa_suspend(struct platform_device *pdev, pm_message_t state);
int snd_omap_alsa_resume(struct platform_device *pdev);
#else
#define snd_omap_alsa_suspend NULL
#define snd_omap_alsa_resume NULL
#endif
void callback_omap_alsa_sound_dma(void *);
#endif
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