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/*
* Greybus audio
*
* Copyright 2015 Google Inc.
* Copyright 2015 Linaro Ltd.
*
* Released under the GPLv2 only.
*/
#ifndef __GB_AUDIO_H
#define __GB_AUDIO_H
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <sound/soc.h>
#include "greybus.h"
#define GB_SAMPLE_RATE 48000
#define GB_RATES SNDRV_PCM_RATE_48000
#define GB_FMTS SNDRV_PCM_FMTBIT_S16_LE
#define PREALLOC_BUFFER (32 * 1024)
#define PREALLOC_BUFFER_MAX (32 * 1024)
/* assuming 1 ms samples @ 48KHz */
#define CONFIG_SAMPLES_PER_MSG 48L
#define CONFIG_PERIOD_NS 1000000 /* send msg every 1ms */
#define CONFIG_COUNT_MAX 20
/* Switch between dummy spdif and jetson rt5645 codec */
#define USE_RT5645 0
#define SAMPLE_SIZE 4
#define MAX_SEND_DATA_LEN (CONFIG_SAMPLES_PER_MSG * SAMPLE_SIZE)
#define SEND_DATA_BUF_LEN (sizeof(struct gb_i2s_send_data_request) + \
MAX_SEND_DATA_LEN)
/*
* This is the gb_snd structure which ties everything together
* and fakes DMA interrupts via a timer.
*/
struct gb_snd {
struct platform_device card;
struct platform_device cpu_dai;
struct platform_device *codec;
struct asoc_simple_card_info *simple_card_info;
struct i2c_client *rt5647;
struct gb_connection *mgmt_connection;
struct gb_connection *i2s_tx_connection;
struct gb_connection *i2s_rx_connection;
struct gb_i2s_mgmt_get_supported_configurations_response
*i2s_configs;
char *send_data_req_buf;
long send_data_sample_count;
int gb_bundle_id;
int device_count;
struct snd_pcm_substream *substream;
struct hrtimer timer;
atomic_t running;
bool cport_active;
struct workqueue_struct *workqueue;
struct work_struct work;
int hwptr_done;
int transfer_done;
struct list_head list;
spinlock_t lock;
};
/*
* GB I2S cmd functions
*/
int gb_i2s_mgmt_get_version(struct gb_connection *connection);
int gb_i2s_data_get_version(struct gb_connection *connection);
int gb_i2s_mgmt_activate_cport(struct gb_connection *connection,
uint16_t cport);
int gb_i2s_mgmt_deactivate_cport(struct gb_connection *connection,
uint16_t cport);
int gb_i2s_mgmt_get_supported_configurations(
struct gb_connection *connection,
struct gb_i2s_mgmt_get_supported_configurations_response *get_cfg,
size_t size);
int gb_i2s_mgmt_set_configuration(struct gb_connection *connection,
struct gb_i2s_mgmt_set_configuration_request *set_cfg);
int gb_i2s_mgmt_set_samples_per_message(struct gb_connection *connection,
uint16_t samples_per_message);
int gb_i2s_mgmt_get_cfgs(struct gb_snd *snd_dev,
struct gb_connection *connection);
void gb_i2s_mgmt_free_cfgs(struct gb_snd *snd_dev);
int gb_i2s_mgmt_set_cfg(struct gb_snd *snd_dev, int rate, int chans,
int bytes_per_chan, int is_le);
int gb_i2s_send_data(struct gb_connection *connection, void *req_buf,
void *source_addr, size_t len, int sample_num);
/*
* GB PCM hooks
*/
void gb_pcm_hrtimer_start(struct gb_snd *snd_dev);
void gb_pcm_hrtimer_stop(struct gb_snd *snd_dev);
/*
* Platform drivers
*/
extern struct platform_driver gb_audio_pcm_driver;
extern struct platform_driver gb_audio_plat_driver;
#endif /* __GB_AUDIO_H */
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