/*****************************************************************************
* Copyright 2011 Broadcom Corporation. All rights reserved.
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2, available at
* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a
* license other than the GPL, without Broadcom's express prior written
* consent.
*****************************************************************************/
#ifndef __SOUND_ARM_BCM2835_H
#define __SOUND_ARM_BCM2835_H
#include <linux/device.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/pcm-indirect.h>
#include <linux/workqueue.h>
/*
* #define AUDIO_DEBUG_ENABLE
* #define AUDIO_VERBOSE_DEBUG_ENABLE
*/
/* Debug macros */
#ifdef AUDIO_DEBUG_ENABLE
#ifdef AUDIO_VERBOSE_DEBUG_ENABLE
#define audio_debug(fmt, arg...) \
pr_info("%s:%d " fmt, __func__, __LINE__, ##arg)
#define audio_info(fmt, arg...) \
pr_info("%s:%d " fmt, __func__, __LINE__, ##arg)
#else
#define audio_debug(fmt, arg...)
#define audio_info(fmt, arg...)
#endif /* AUDIO_VERBOSE_DEBUG_ENABLE */
#else
#define audio_debug(fmt, arg...)
#define audio_info(fmt, arg...)
#endif /* AUDIO_DEBUG_ENABLE */
#define audio_error(fmt, arg...) \
pr_err("%s:%d " fmt, __func__, __LINE__, ##arg)
#define audio_warning(fmt, arg...) \
pr_warn("%s:%d " fmt, __func__, __LINE__, ##arg)
#define audio_alert(fmt, arg...) \
pr_alert("%s:%d " fmt, __func__, __LINE__, ##arg)
#define MAX_SUBSTREAMS (8)
#define AVAIL_SUBSTREAMS_MASK (0xff)
enum {
CTRL_VOL_MUTE,
CTRL_VOL_UNMUTE
};
/* macros for alsa2chip and chip2alsa, instead of functions */
// convert alsa to chip volume (defined as macro rather than function call)
#define alsa2chip(vol) (uint)(-(((vol) << 8) / 100))
// convert chip to alsa volume
#define chip2alsa(vol) -(((vol) * 100) >> 8)
/* Some constants for values .. */
enum snd_bcm2835_route {
AUDIO_DEST_AUTO = 0,
AUDIO_DEST_HEADPHONES = 1,
AUDIO_DEST_HDMI = 2,
AUDIO_DEST_MAX,
};
enum snd_bcm2835_ctrl {
PCM_PLAYBACK_VOLUME,
PCM_PLAYBACK_MUTE,
PCM_PLAYBACK_DEVICE,
};
/* definition of the chip-specific record */
struct bcm2835_chip {
struct snd_card *card;
struct snd_pcm *pcm;
struct snd_pcm *pcm_spdif;
/* Bitmat for valid reg_base and irq numbers */
unsigned int avail_substreams;
struct device *dev;
struct bcm2835_alsa_stream *alsa_stream[MAX_SUBSTREAMS];
int volume;
int old_volume; /* stores the volume value whist muted */
int dest;
int mute;
unsigned int opened;
unsigned int spdif_status;
struct mutex audio_mutex;
};
struct bcm2835_alsa_stream {
struct bcm2835_chip *chip;
struct snd_pcm_substream *substream;
struct snd_pcm_indirect pcm_indirect;
spinlock_t lock;
volatile unsigned int control;
volatile unsigned int status;
int open;
int running;
int draining;
int channels;
int params_rate;
int pcm_format_width;
unsigned int pos;
unsigned int buffer_size;
unsigned int period_size;
atomic_t retrieved;
struct bcm2835_audio_instance *instance;
struct workqueue_struct *my_wq;
int idx;
};
int snd_bcm2835_new_ctl(struct bcm2835_chip *chip);
int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, u32 numchannels);
int snd_bcm2835_new_spdif_pcm(struct bcm2835_chip *chip);
int snd_bcm2835_new_simple_pcm(struct bcm2835_chip *chip,
const char *name,
enum snd_bcm2835_route route,
u32 numchannels);
int snd_bcm2835_new_hdmi_ctl(struct bcm2835_chip *chip);
int snd_bcm2835_new_headphones_ctl(struct bcm2835_chip *chip);
int bcm2835_audio_open(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_close(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_set_params(struct bcm2835_alsa_stream *alsa_stream,
unsigned int channels, unsigned int samplerate,
unsigned int bps);
int bcm2835_audio_setup(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_start(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_stop(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_set_ctls(struct bcm2835_chip *chip);
int bcm2835_audio_write(struct bcm2835_alsa_stream *alsa_stream,
unsigned int count,
void *src);
void bcm2835_playback_fifo(struct bcm2835_alsa_stream *alsa_stream);
unsigned int bcm2835_audio_retrieve_buffers(struct bcm2835_alsa_stream *alsa_stream);
void bcm2835_audio_flush_buffers(struct bcm2835_alsa_stream *alsa_stream);
void bcm2835_audio_flush_playback_buffers(struct bcm2835_alsa_stream *alsa_stream);
#endif /* __SOUND_ARM_BCM2835_H */
