1/* 2 * arch/arm/plat-omap/include/mach/omap-alsa.h 3 * 4 * Alsa Driver for AIC23 and TSC2101 codecs on OMAP platform boards. 5 * 6 * Copyright (C) 2006 Mika Laitio <lamikr@cc.jyu.fi> 7 * 8 * Copyright (C) 2005 Instituto Nokia de Tecnologia - INdT - Manaus Brazil 9 * Written by Daniel Petrini, David Cohen, Anderson Briglia 10 * {daniel.petrini, david.cohen, anderson.briglia}@indt.org.br 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the 14 * Free Software Foundation; either version 2 of the License, or (at your 15 * option) any later version. 16 * 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 20 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 24 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * You should have received a copy of the GNU General Public License along 29 * with this program; if not, write to the Free Software Foundation, Inc., 30 * 675 Mass Ave, Cambridge, MA 02139, USA. 31 * 32 * History 33 * ------- 34 * 35 * 2005/07/25 INdT-10LE Kernel Team - Alsa driver for omap osk, 36 * original version based in sa1100 driver 37 * and omap oss driver. 38 */ 39 40#ifndef __OMAP_ALSA_H 41#define __OMAP_ALSA_H 42 43#include <plat/dma.h> 44#include <sound/core.h> 45#include <sound/pcm.h> 46#include <plat/mcbsp.h> 47#include <linux/platform_device.h> 48 49#define DMA_BUF_SIZE (1024 * 8) 50 51/* 52 * Buffer management for alsa and dma 53 */ 54struct audio_stream { 55 char *id; /* identification string */ 56 int stream_id; /* numeric identification */ 57 int dma_dev; /* dma number of that device */ 58 int *lch; /* Chain of channels this stream is linked to */ 59 char started; /* to store if the chain was started or not */ 60 int dma_q_head; /* DMA Channel Q Head */ 61 int dma_q_tail; /* DMA Channel Q Tail */ 62 char dma_q_count; /* DMA Channel Q Count */ 63 int active:1; /* we are using this stream for transfer now */ 64 int period; /* current transfer period */ 65 int periods; /* current count of periods registerd in the DMA engine */ 66 spinlock_t dma_lock; /* for locking in DMA operations */ 67 struct snd_pcm_substream *stream; /* the pcm stream */ 68 unsigned linked:1; /* dma channels linked */ 69 int offset; /* store start position of the last period in the alsa buffer */ 70 int (*hw_start)(void); /* interface to start HW interface, e.g. McBSP */ 71 int (*hw_stop)(void); /* interface to stop HW interface, e.g. McBSP */ 72}; 73 74/* 75 * Alsa card structure for aic23 76 */ 77struct snd_card_omap_codec { 78 struct snd_card *card; 79 struct snd_pcm *pcm; 80 long samplerate; 81 struct audio_stream s[2]; /* playback & capture */ 82}; 83 84/* Codec specific information and function pointers. 85 * Codec (omap-alsa-aic23.c and omap-alsa-tsc2101.c) 86 * are responsible for defining the function pointers. 87 */ 88struct omap_alsa_codec_config { 89 char *name; 90 struct omap_mcbsp_reg_cfg *mcbsp_regs_alsa; 91 struct snd_pcm_hw_constraint_list *hw_constraints_rates; 92 struct snd_pcm_hardware *snd_omap_alsa_playback; 93 struct snd_pcm_hardware *snd_omap_alsa_capture; 94 void (*codec_configure_dev)(void); 95 void (*codec_set_samplerate)(long); 96 void (*codec_clock_setup)(void); 97 int (*codec_clock_on)(void); 98 int (*codec_clock_off)(void); 99 int (*get_default_samplerate)(void); 100}; 101 102/*********** Mixer function prototypes *************************/ 103int snd_omap_mixer(struct snd_card_omap_codec *); 104void snd_omap_init_mixer(void); 105 106#ifdef CONFIG_PM 107void snd_omap_suspend_mixer(void); 108void snd_omap_resume_mixer(void); 109#endif 110 111int snd_omap_alsa_post_probe(struct platform_device *pdev, struct omap_alsa_codec_config *config); 112int snd_omap_alsa_remove(struct platform_device *pdev); 113#ifdef CONFIG_PM 114int snd_omap_alsa_suspend(struct platform_device *pdev, pm_message_t state); 115int snd_omap_alsa_resume(struct platform_device *pdev); 116#else 117#define snd_omap_alsa_suspend NULL 118#define snd_omap_alsa_resume NULL 119#endif 120 121void callback_omap_alsa_sound_dma(void *); 122 123#endif 124