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Kernel: Add support for SD host controllers on the PCI bus

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Marco Cutecchia 2023-03-23 21:31:01 +01:00 • committed by Andrew Kaster
parent 47cae8005f
commit 5fe6c6fc24
5 changed files with 124 additions and 5 deletions
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37
Kernel/Storage/SD/PCISDHostController.cpp Normal file
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/*
* Copyright (c) 2023, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Storage/SD/PCISDHostController.h>
namespace Kernel {
ErrorOr<NonnullRefPtr<PCISDHostController>> PCISDHostController::try_initialize(PCI::DeviceIdentifier const& device_identifier)
{
auto sdhc = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) PCISDHostController(device_identifier)));
TRY(sdhc->initialize());
return sdhc;
}
PCISDHostController::PCISDHostController(PCI::DeviceIdentifier const& device_identifier)
: PCI::Device(device_identifier)
, SDHostController()
{
auto slot_information_register = read_slot_information();
if (slot_information_register.slots_available() != 1) {
// TODO: Support multiple slots
dmesgln("SD Host Controller has {} slots, but we currently only support using only one", slot_information_register.slots_available());
}
auto physical_address_of_sdhc_registers = PhysicalAddress {
PCI::get_BAR(device_identifier, static_cast<PCI::HeaderType0BaseRegister>(slot_information_register.first_bar_number))
};
m_registers = Memory::map_typed_writable<SD::HostControlRegisterMap volatile>(physical_address_of_sdhc_registers).release_value_but_fixme_should_propagate_errors();
}
}