zircon/system/dev/gpio/as370-gpio/as370-gpio.h

// Copyright 2019 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 <ddktl/device.h>
#include <ddktl/protocol/gpioimpl.h>
#include <lib/mmio/mmio.h>

namespace gpio {

class As370Gpio : public ddk::Device<As370Gpio>,
                  public ddk::GpioImplProtocol<As370Gpio, ddk::base_protocol> {
public:
    static zx_status_t Create(void* ctx, zx_device_t* parent);

    As370Gpio(zx_device_t* parent, ddk::MmioBuffer pinmux_mmio, ddk::MmioBuffer gpio1_mmio,
              ddk::MmioBuffer gpio2_mmio)
        : ddk::Device<As370Gpio>(parent), pinmux_mmio_(std::move(pinmux_mmio)),
          gpio1_mmio_(std::move(gpio1_mmio)), gpio2_mmio_(std::move(gpio2_mmio)) {}
    virtual ~As370Gpio() = default;

    void DdkRelease() { delete this; }

    zx_status_t GpioImplConfigIn(uint32_t index, uint32_t flags);
    zx_status_t GpioImplConfigOut(uint32_t index, uint8_t initial_value);
    zx_status_t GpioImplSetAltFunction(uint32_t index, uint64_t function);
    zx_status_t GpioImplSetDriveStrength(uint32_t index, uint8_t m_a);
    zx_status_t GpioImplRead(uint32_t index, uint8_t* out_value);
    virtual zx_status_t GpioImplWrite(uint32_t index, uint8_t value);
    zx_status_t GpioImplGetInterrupt(uint32_t index, uint32_t flags, zx::interrupt* out_irq);
    zx_status_t GpioImplReleaseInterrupt(uint32_t index);
    zx_status_t GpioImplSetPolarity(uint32_t index, gpio_polarity_t polarity);

protected:
    ddk::MmioBuffer pinmux_mmio_;
    ddk::MmioBuffer gpio1_mmio_;
    ddk::MmioBuffer gpio2_mmio_;

private:
    zx_status_t Init();
};

}  // namespace gpio