124 строки
4.4 KiB
C
124 строки
4.4 KiB
C
/*
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* linux/include/asm-arm/arch-omap/omap-alsa.h
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*
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* Alsa Driver for AIC23 and TSC2101 codecs on OMAP platform boards.
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*
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* Copyright (C) 2006 Mika Laitio <lamikr@cc.jyu.fi>
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*
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* Copyright (C) 2005 Instituto Nokia de Tecnologia - INdT - Manaus Brazil
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* Written by Daniel Petrini, David Cohen, Anderson Briglia
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* {daniel.petrini, david.cohen, anderson.briglia}@indt.org.br
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* History
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* -------
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*
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* 2005/07/25 INdT-10LE Kernel Team - Alsa driver for omap osk,
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* original version based in sa1100 driver
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* and omap oss driver.
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*/
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#ifndef __OMAP_ALSA_H
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#define __OMAP_ALSA_H
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#include <asm/arch/dma.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <asm/arch/mcbsp.h>
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#include <linux/platform_device.h>
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#define DMA_BUF_SIZE (1024 * 8)
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/*
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* Buffer management for alsa and dma
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*/
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struct audio_stream {
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char *id; /* identification string */
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int stream_id; /* numeric identification */
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int dma_dev; /* dma number of that device */
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int *lch; /* Chain of channels this stream is linked to */
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char started; /* to store if the chain was started or not */
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int dma_q_head; /* DMA Channel Q Head */
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int dma_q_tail; /* DMA Channel Q Tail */
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char dma_q_count; /* DMA Channel Q Count */
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int active:1; /* we are using this stream for transfer now */
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int period; /* current transfer period */
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int periods; /* current count of periods registerd in the DMA engine */
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spinlock_t dma_lock; /* for locking in DMA operations */
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struct snd_pcm_substream *stream; /* the pcm stream */
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unsigned linked:1; /* dma channels linked */
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int offset; /* store start position of the last period in the alsa buffer */
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int (*hw_start)(void); /* interface to start HW interface, e.g. McBSP */
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int (*hw_stop)(void); /* interface to stop HW interface, e.g. McBSP */
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};
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/*
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* Alsa card structure for aic23
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*/
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struct snd_card_omap_codec {
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struct snd_card *card;
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struct snd_pcm *pcm;
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long samplerate;
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struct audio_stream s[2]; /* playback & capture */
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};
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/* Codec specific information and function pointers.
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* Codec (omap-alsa-aic23.c and omap-alsa-tsc2101.c)
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* are responsible for defining the function pointers.
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*/
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struct omap_alsa_codec_config {
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char *name;
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struct omap_mcbsp_reg_cfg *mcbsp_regs_alsa;
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struct snd_pcm_hw_constraint_list *hw_constraints_rates;
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struct snd_pcm_hardware *snd_omap_alsa_playback;
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struct snd_pcm_hardware *snd_omap_alsa_capture;
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void (*codec_configure_dev)(void);
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void (*codec_set_samplerate)(long);
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void (*codec_clock_setup)(void);
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int (*codec_clock_on)(void);
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int (*codec_clock_off)(void);
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int (*get_default_samplerate)(void);
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};
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/*********** Mixer function prototypes *************************/
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int snd_omap_mixer(struct snd_card_omap_codec *);
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void snd_omap_init_mixer(void);
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#ifdef CONFIG_PM
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void snd_omap_suspend_mixer(void);
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void snd_omap_resume_mixer(void);
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#endif
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int snd_omap_alsa_post_probe(struct platform_device *pdev, struct omap_alsa_codec_config *config);
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int snd_omap_alsa_remove(struct platform_device *pdev);
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#ifdef CONFIG_PM
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int snd_omap_alsa_suspend(struct platform_device *pdev, pm_message_t state);
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int snd_omap_alsa_resume(struct platform_device *pdev);
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#else
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#define snd_omap_alsa_suspend NULL
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#define snd_omap_alsa_resume NULL
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#endif
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void callback_omap_alsa_sound_dma(void *);
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#endif
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