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https://github.com/RGBCube/serenity
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500b7b08d6
The Storage subsystem, like the Audio and HID subsystems, exposes Unix device files (for example, in the /dev directory). To ensure consistency across the repository, we should make the Storage subsystem to reside in the Kernel/Devices directory like the two other mentioned subsystems.
41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
/*
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* Copyright (c) 2023, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Devices/Storage/SD/PCISDHostController.h>
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namespace Kernel {
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ErrorOr<NonnullRefPtr<PCISDHostController>> PCISDHostController::try_initialize(PCI::DeviceIdentifier const& device_identifier)
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{
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auto sdhc = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) PCISDHostController(device_identifier)));
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TRY(sdhc->initialize());
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PCI::enable_bus_mastering(sdhc->device_identifier());
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PCI::enable_memory_space(sdhc->device_identifier());
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sdhc->try_enable_dma();
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return sdhc;
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}
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PCISDHostController::PCISDHostController(PCI::DeviceIdentifier const& device_identifier)
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: PCI::Device(device_identifier)
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, SDHostController()
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{
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auto slot_information_register = read_slot_information();
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if (slot_information_register.slots_available() != 1) {
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// TODO: Support multiple slots
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dmesgln("SD Host Controller has {} slots, but we currently only support using only one", slot_information_register.slots_available());
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}
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auto physical_address_of_sdhc_registers = PhysicalAddress {
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PCI::get_BAR(device_identifier, static_cast<PCI::HeaderType0BaseRegister>(slot_information_register.first_bar_number))
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};
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m_registers = Memory::map_typed_writable<SD::HostControlRegisterMap volatile>(physical_address_of_sdhc_registers).release_value_but_fixme_should_propagate_errors();
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}
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}
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