src/devices/board/drivers/vim3/vim3-gpio.cc

// Copyright 2020 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.

#include <fuchsia/hardware/platform/bus/c/banjo.h>

#include <ddk/debug.h>
#include <ddk/device.h>
#include <ddk/metadata.h>
#include <ddk/metadata/gpio.h>
#include <ddk/platform-defs.h>
#include <soc/aml-a311d/a311d-gpio.h>
#include <soc/aml-a311d/a311d-hw.h>

#include "vim3-gpios.h"
#include "vim3.h"

namespace vim3 {

static const pbus_mmio_t gpio_mmios[] = {
    {
        .base = A311D_GPIO_BASE,
        .length = A311D_GPIO_LENGTH,
    },
    {
        .base = A311D_GPIO_AO_BASE,
        .length = A311D_GPIO_AO_LENGTH,
    },
    {
        .base = A311D_GPIO_INTERRUPT_BASE,
        .length = A311D_GPIO_INTERRUPT_LENGTH,
    },
};

static const pbus_irq_t gpio_irqs[] = {
    {
        .irq = A311D_GPIO_IRQ_0,
        .mode = ZX_INTERRUPT_MODE_DEFAULT,
    },
    {
        .irq = A311D_GPIO_IRQ_1,
        .mode = ZX_INTERRUPT_MODE_DEFAULT,
    },
    {
        .irq = A311D_GPIO_IRQ_2,
        .mode = ZX_INTERRUPT_MODE_DEFAULT,
    },
    {
        .irq = A311D_GPIO_IRQ_3,
        .mode = ZX_INTERRUPT_MODE_DEFAULT,
    },
    {
        .irq = A311D_GPIO_IRQ_4,
        .mode = ZX_INTERRUPT_MODE_DEFAULT,
    },
    {
        .irq = A311D_GPIO_IRQ_5,
        .mode = ZX_INTERRUPT_MODE_DEFAULT,
    },
    {
        .irq = A311D_GPIO_IRQ_6,
        .mode = ZX_INTERRUPT_MODE_DEFAULT,
    },
    {
        .irq = A311D_GPIO_IRQ_7,
        .mode = ZX_INTERRUPT_MODE_DEFAULT,
    },
};

// GPIOs to expose from generic GPIO driver.
static const gpio_pin_t gpio_pins[] = {
    {VIM3_J4_PIN_39},
    {VIM3_ETH_MAC_INTR},
    {A311D_GPIOBOOT(12)},
    {A311D_GPIOX(6)},
};

static const pbus_metadata_t gpio_metadata[] = {
    {
        .type = DEVICE_METADATA_GPIO_PINS,
        .data_buffer = &gpio_pins,
        .data_size = sizeof(gpio_pins),
    },
};

static pbus_dev_t gpio_dev = []() {
  pbus_dev_t dev = {};
  dev.name = "gpio";
  dev.vid = PDEV_VID_AMLOGIC;
  dev.pid = PDEV_PID_AMLOGIC_A311D;
  dev.did = PDEV_DID_AMLOGIC_GPIO;
  dev.mmio_list = gpio_mmios;
  dev.mmio_count = countof(gpio_mmios);
  dev.irq_list = gpio_irqs;
  dev.irq_count = countof(gpio_irqs);
  dev.metadata_list = gpio_metadata;
  dev.metadata_count = countof(gpio_metadata);
  return dev;
}();

zx_status_t Vim3::GpioInit() {
  zx_status_t status = pbus_.ProtocolDeviceAdd(ZX_PROTOCOL_GPIO_IMPL, &gpio_dev);
  if (status != ZX_OK) {
    zxlogf(ERROR, "%s: ProtocolDeviceAdd failed %d", __func__, status);
    return status;
  }

  gpio_impl_ = ddk::GpioImplProtocolClient(parent());
  if (!gpio_impl_.is_valid()) {
    zxlogf(ERROR, "%s: device_get_protocol failed %d", __func__, status);
    return ZX_ERR_INTERNAL;
  }

  return ZX_OK;
}

}  // namespace vim3