diff options
Diffstat (limited to 'arch/arm/plat-omap/include/plat/omap-alsa.h')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/omap-alsa.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/omap-alsa.h b/arch/arm/plat-omap/include/plat/omap-alsa.h new file mode 100644 index 0000000..b53055b --- /dev/null +++ b/arch/arm/plat-omap/include/plat/omap-alsa.h @@ -0,0 +1,123 @@ +/* + * arch/arm/plat-omap/include/mach/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 <plat/dma.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <plat/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 |