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/*
* tegra_offload.h - Definitions for Tegra offload platform driver interface
*
* Author: Sumit Bhattacharya <sumitb@nvidia.com>
* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef __TEGRA_OFFLOAD_H__
#define __TEGRA_OFFLOAD_H__
struct tegra_offload_dma_params {
unsigned long addr;
unsigned long width;
unsigned long req_sel;
unsigned long max_burst;
};
struct tegra_offload_mem {
struct device *dev;
unsigned char *virt_addr;
dma_addr_t phys_addr;
size_t bytes;
};
struct tegra_offload_pcm_params {
int rate;
int channels;
int bits_per_sample;
int buffer_size; /* bytes */
int period_size; /* bytes */
struct tegra_offload_mem source_buf;
struct tegra_offload_dma_params dma_params;
void (*period_elapsed_cb)(void *args, unsigned int is_eos);
void *period_elapsed_args;
};
struct tegra_offload_compr_params {
unsigned int codec_type; /* SND_AUDIOCODEC_* type */
int rate;
int channels;
int bits_per_sample;
int fragment_size; /* bytes */
int fragments;
struct tegra_offload_dma_params dma_params;
void (*fragments_elapsed_cb)(void *args, unsigned int is_eos);
void *fragments_elapsed_args;
};
struct tegra_offload_pcm_ops {
int (*stream_open)(int *id, char *stream);
void (*stream_close)(int id);
int (*set_stream_params)(int id,
struct tegra_offload_pcm_params *params);
int (*set_stream_state)(int id, int state);
size_t (*get_stream_position)(int id);
void (*data_ready)(int id, int bytes);
};
struct tegra_offload_compr_ops {
int (*stream_open)(int *id);
void (*stream_close)(int id);
int (*set_stream_params)(int id,
struct tegra_offload_compr_params *params);
int (*set_stream_state)(int id, int state);
int (*get_stream_position)(int id, struct snd_compr_tstamp *tstamp);
void (*data_ready)(int id, int bytes);
int (*write)(int id, char __user *buf, int bytes);
int (*get_caps)(struct snd_compr_caps *caps);
int (*get_codec_caps)(struct snd_compr_codec_caps *codec);
int (*set_stream_volume)(int id, int left, int right);
};
struct tegra_offload_device_ops {
int (*set_hw_rate)(int rate);
int (*alloc_shared_mem)(struct tegra_offload_mem *mem, int bytes);
void (*free_shared_mem)(struct tegra_offload_mem *mem);
};
struct tegra_offload_ops {
struct tegra_offload_device_ops device_ops;
struct tegra_offload_pcm_ops pcm_ops;
struct tegra_offload_pcm_ops loopback_ops;
struct tegra_offload_compr_ops compr_ops;
};
int tegra_register_offload_ops(struct tegra_offload_ops *ops);
#endif
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