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