system/dev/serial/intel-serialio/serialio.c

// Copyright 2016 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 <ddk/binding.h>
#include <ddk/protocol/pci.h>
#include <hw/pci.h>

#include <zircon/listnode.h>

#include <zircon/syscalls.h>
#include <zircon/types.h>

#include <stdio.h>

#include <intel-serialio/serialio.h>

static zx_status_t intel_serialio_bind(void* ctx, zx_device_t* dev, void** cookie) {
    pci_protocol_t pci;
    zx_status_t res;

    if (device_get_protocol(dev, ZX_PROTOCOL_PCI, &pci))
        return ZX_ERR_NOT_SUPPORTED;

    const pci_config_t* pci_config;
    size_t config_size;
    zx_handle_t config_handle = ZX_HANDLE_INVALID;
    res = pci_map_resource(&pci, PCI_RESOURCE_CONFIG, ZX_CACHE_POLICY_UNCACHED_DEVICE,
                           (void**)&pci_config, &config_size, &config_handle);

    if (res != ZX_OK) {
        xprintf("serialio: failed to map pci config: %d\n", res);
        return res;
    }

    switch (pci_config->device_id) {
    case INTEL_WILDCAT_POINT_SERIALIO_DMA_DID:
        res = intel_serialio_bind_dma(dev);
        break;
    case INTEL_WILDCAT_POINT_SERIALIO_I2C0_DID:
    case INTEL_WILDCAT_POINT_SERIALIO_I2C1_DID:
    case INTEL_SUNRISE_POINT_SERIALIO_I2C0_DID:
    case INTEL_SUNRISE_POINT_SERIALIO_I2C1_DID:
    case INTEL_SUNRISE_POINT_SERIALIO_I2C2_DID:
    case INTEL_SUNRISE_POINT_SERIALIO_I2C3_DID:
        res = intel_serialio_bind_i2c(dev);
        break;
    case INTEL_WILDCAT_POINT_SERIALIO_SDIO_DID:
        res = intel_serialio_bind_sdio(dev);
        break;
    case INTEL_WILDCAT_POINT_SERIALIO_SPI0_DID:
        res = intel_serialio_bind_spi(dev);
        break;
    case INTEL_WILDCAT_POINT_SERIALIO_SPI1_DID:
        res = intel_serialio_bind_spi(dev);
        break;
    case INTEL_WILDCAT_POINT_SERIALIO_UART0_DID:
    case INTEL_WILDCAT_POINT_SERIALIO_UART1_DID:
    case INTEL_SUNRISE_POINT_SERIALIO_UART0_DID:
        res = intel_serialio_bind_uart(dev);
        break;
    default:
        res = ZX_ERR_NOT_SUPPORTED;
        break;
    }

    zx_handle_close(config_handle);
    return res;
}

static zx_driver_ops_t intel_serialio_driver_ops = {
    .version = DRIVER_OPS_VERSION,
    .bind = intel_serialio_bind,
};

// clang-format off
ZIRCON_DRIVER_BEGIN(intel_serialio, intel_serialio_driver_ops, "zircon", "0.1", 15)
    BI_ABORT_IF(NE, BIND_PROTOCOL, ZX_PROTOCOL_PCI),
    BI_ABORT_IF(NE, BIND_PCI_VID, INTEL_VID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_WILDCAT_POINT_SERIALIO_DMA_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_WILDCAT_POINT_SERIALIO_I2C0_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_WILDCAT_POINT_SERIALIO_I2C1_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_WILDCAT_POINT_SERIALIO_SDIO_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_WILDCAT_POINT_SERIALIO_SPI0_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_WILDCAT_POINT_SERIALIO_SPI1_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_WILDCAT_POINT_SERIALIO_UART0_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_WILDCAT_POINT_SERIALIO_UART1_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_SUNRISE_POINT_SERIALIO_I2C0_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_SUNRISE_POINT_SERIALIO_I2C1_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_SUNRISE_POINT_SERIALIO_I2C2_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_SUNRISE_POINT_SERIALIO_I2C3_DID),
    BI_MATCH_IF(EQ, BIND_PCI_DID, INTEL_SUNRISE_POINT_SERIALIO_UART0_DID),
ZIRCON_DRIVER_END(intel_serialio)