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Diffstat (limited to 'sound/arm/bcm2835.h')
| -rwxr-xr-x | sound/arm/bcm2835.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/sound/arm/bcm2835.h b/sound/arm/bcm2835.h new file mode 100755 index 000000000000..0f71c5def314 --- /dev/null +++ b/sound/arm/bcm2835.h @@ -0,0 +1,167 @@ +/***************************************************************************** +* 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...) \ + printk(KERN_INFO"%s:%d " fmt, __func__, __LINE__, ##arg) + +#define audio_info(fmt, arg...) \ + printk(KERN_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...) \ + printk(KERN_ERR"%s:%d " fmt, __func__, __LINE__, ##arg) + +#define audio_warning(fmt, arg...) \ + printk(KERN_WARNING"%s:%d " fmt, __func__, __LINE__, ##arg) + +#define audio_alert(fmt, arg...) \ + printk(KERN_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 */ + +#define alsa2chip(vol) (uint)(-((vol << 8) / 100)) /* convert alsa to chip volume (defined as macro rather than function call) */ +#define chip2alsa(vol) -((vol * 100) >> 8) /* convert chip to alsa volume */ + +/* Some constants for values .. */ +typedef enum { + AUDIO_DEST_AUTO = 0, + AUDIO_DEST_HEADPHONES = 1, + AUDIO_DEST_HDMI = 2, + AUDIO_DEST_MAX, +} SND_BCM2835_ROUTE_T; + +typedef enum { + PCM_PLAYBACK_VOLUME, + PCM_PLAYBACK_MUTE, + PCM_PLAYBACK_DEVICE, +} SND_BCM2835_CTRL_T; + +/* definition of the chip-specific record */ +typedef struct bcm2835_chip { + struct snd_card *card; + struct snd_pcm *pcm; + struct snd_pcm *pcm_spdif; + /* Bitmat for valid reg_base and irq numbers */ + uint32_t avail_substreams; + struct platform_device *pdev[MAX_SUBSTREAMS]; + 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; +} bcm2835_chip_t; + +typedef struct bcm2835_alsa_stream { + bcm2835_chip_t *chip; + struct snd_pcm_substream *substream; + struct snd_pcm_indirect pcm_indirect; + + struct semaphore buffers_update_sem; + struct semaphore control_sem; + spinlock_t lock; + volatile uint32_t control; + volatile uint32_t 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; + + uint32_t enable_fifo_irq; + irq_handler_t fifo_irq_handler; + + atomic_t retrieved; + struct opaque_AUDIO_INSTANCE_T *instance; + struct workqueue_struct *my_wq; + int idx; +} bcm2835_alsa_stream_t; + +int snd_bcm2835_new_ctl(bcm2835_chip_t * chip); +int snd_bcm2835_new_pcm(bcm2835_chip_t * chip); +int snd_bcm2835_new_spdif_pcm(bcm2835_chip_t * chip); + +int bcm2835_audio_open(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_close(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_set_params(bcm2835_alsa_stream_t * alsa_stream, + uint32_t channels, uint32_t samplerate, + uint32_t bps); +int bcm2835_audio_setup(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_start(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_stop(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_set_ctls(bcm2835_chip_t * chip); +int bcm2835_audio_write(bcm2835_alsa_stream_t * alsa_stream, uint32_t count, + void *src); +uint32_t bcm2835_audio_retrieve_buffers(bcm2835_alsa_stream_t * alsa_stream); +void bcm2835_audio_flush_buffers(bcm2835_alsa_stream_t * alsa_stream); +void bcm2835_audio_flush_playback_buffers(bcm2835_alsa_stream_t * alsa_stream); + +#endif /* __SOUND_ARM_BCM2835_H */ |