// 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.

#include <limits.h>

#include <ddk/debug.h>
#include <ddk/device.h>
#include <ddk/metadata.h>
#include <ddk/metadata/i2c.h>
#include <ddk/platform-defs.h>
#include <soc/aml-a113/a113-hw.h>

#include "gauss.h"

static const pbus_mmio_t i2c_mmios[] = {
    {
        // AML_I2C_A
        .base = 0xffd1f000,
        .length = PAGE_SIZE,
    },
    {
        // AML_I2C_B
        .base = 0xffd1e000,
        .length = PAGE_SIZE,
    },
    // Gauss only uses I2C_A and I2C_B
    /*
         {
            // AML_I2C_C
            .base = 0xffd1d000,
            .length = PAGE_SIZE,
        },
        {
            // AML_I2C_D
            .base = 0xffd1e000,
            .length = 0xffd1c000,
        },
    */
};

static const pbus_irq_t i2c_irqs[] = {
    {
        .irq = 21 + 32,
        .mode = ZX_INTERRUPT_MODE_EDGE_HIGH,
    },
    {
        .irq = 214 + 32,
        .mode = ZX_INTERRUPT_MODE_EDGE_HIGH,
    },
    // Gauss only uses I2C_A and I2C_B
    /*
        {
            .irq = 215 + 32,
            .mode = ZX_INTERRUPT_MODE_EDGE_HIGH,
        },
        {
            .irq = 39 + 32,
            .mode = ZX_INTERRUPT_MODE_EDGE_HIGH,
        },
    */
};

static const i2c_channel_t i2c_channels[] = {
    // Audio I2C channels
    {.bus_id = AML_I2C_B, .address = 0x4C},
    /* these appear to be unused.
        {
            .bus_id = AML_I2C_B,
            .address = 0x4D
        },
        {
            .bus_id = AML_I2C_B,
            .address = 0x4E
        },
    */
};

static const pbus_metadata_t i2c_metadata[] = {{
    .type = DEVICE_METADATA_I2C_CHANNELS,
    .data_buffer = &i2c_channels,
    .data_size = sizeof(i2c_channels),
}};

static const pbus_dev_t i2c_dev = {
    .name = "i2c",
    .vid = PDEV_VID_AMLOGIC,
    .pid = PDEV_PID_GENERIC,
    .did = PDEV_DID_AMLOGIC_I2C,
    .mmio_list = i2c_mmios,
    .mmio_count = countof(i2c_mmios),
    .irq_list = i2c_irqs,
    .irq_count = countof(i2c_irqs),
    .metadata_list = i2c_metadata,
    .metadata_count = countof(i2c_metadata),
};

zx_status_t gauss_i2c_init(gauss_bus_t* bus) {
  zx_status_t status = pbus_device_add(&bus->pbus, &i2c_dev);
  if (status != ZX_OK) {
    zxlogf(ERROR, "gauss_i2c_init: pbus_device_add failed: %d\n", status);
    return status;
  }

  return ZX_OK;
}