src/devices/bus/drivers/platform/test/test-i2c.cc

// 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.

#include <fuchsia/hardware/platform/bus/c/banjo.h>
#include <lib/ddk/debug.h>
#include <lib/ddk/device.h>
#include <lib/ddk/metadata.h>
#include <lib/ddk/platform-defs.h>

#include "src/devices/lib/fidl-metadata/i2c.h"
#include "test.h"

namespace board_test {
using i2c_channel_t = fidl_metadata::i2c::Channel;

namespace {

static const i2c_channel_t i2c_channels[] = {
    {
        .bus_id = 0,
        .address = 16,
        // VID/PID/DID unused.
        .vid = 0,
        .pid = 0,
        .did = 0,
    },
    {
        .bus_id = 0,
        .address = 17,
        // VID/PID/DID unused.
        .vid = 0,
        .pid = 0,
        .did = 0,
    },
    {
        .bus_id = 1,
        .address = 5,
        // VID/PID/DID unused.
        .vid = 0,
        .pid = 0,
        .did = 0,
    },
    {
        .bus_id = 1,
        .address = 6,
        // VID/PID/DID unused.
        .vid = 0,
        .pid = 0,
        .did = 0,
    },
};

}  // namespace

zx_status_t TestBoard::I2cInit() {
  pbus_dev_t i2c_dev = {};
  i2c_dev.name = "i2c";
  i2c_dev.vid = PDEV_VID_TEST;
  i2c_dev.pid = PDEV_PID_PBUS_TEST;
  i2c_dev.did = PDEV_DID_TEST_I2C;

  auto i2c_status = fidl_metadata::i2c::I2CChannelsToFidl(i2c_channels);
  if (i2c_status.is_error()) {
    zxlogf(ERROR, "%s: failed to fidl encode i2c channels: %d", __func__, i2c_status.error_value());
    return i2c_status.error_value();
  }

  auto& data = i2c_status.value();

  pbus_metadata_t i2c_metadata = {
      .type = DEVICE_METADATA_I2C_CHANNELS,
      .data_buffer = data.data(),
      .data_size = data.size(),
  };
  i2c_dev.metadata_list = &i2c_metadata;
  i2c_dev.metadata_count = 1;

  zx_status_t status = pbus_.DeviceAdd(&i2c_dev);
  if (status != ZX_OK) {
    zxlogf(ERROR, "%s: DeviceAdd failed %d", __FUNCTION__, status);
    return status;
  }

  return ZX_OK;
}

}  // namespace board_test