system/dev/audio/gauss-tdm/tas57xx.h

// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

#include <ddk/debug.h>
#include <ddk/protocol/i2c.h>
#include <fbl/unique_ptr.h>

namespace audio {
namespace gauss {

class Tas57xx : public fbl::unique_ptr<Tas57xx>{
public:
    static fbl::unique_ptr<Tas57xx> Create(i2c_protocol_t *i2c, uint32_t index);
    bool ValidGain(float gain);
    zx_status_t SetGain(float gain);
    zx_status_t GetGain(float *gain);
    zx_status_t Init(uint8_t slot);
    zx_status_t Reset();
    zx_status_t Standby();
    zx_status_t ExitStandby();

private:
    friend class fbl::unique_ptr<Tas57xx>;
    static constexpr float kMaxGain = 24.0;
    static constexpr float kMinGain = -103.0;
    Tas57xx();
    ~Tas57xx();

    zx_status_t WriteReg(uint8_t reg, uint8_t value);

    zx_status_t SetStandby(bool stdby);

    i2c_channel_t ch_;

    float current_gain_ = 0;
};
} // namespace gauss
} // namespace audio