mirror of
https://github.com/RGBCube/serenity
synced 2025-05-22 17:15:08 +00:00
eaf88cc78a
And also try_create<T> => try_make_ref_counted<T>. A global "create" was a bit much. The new name matches make<T> better, which we've used for making single-owner objects since forever.
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*
|
|
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/Bus/USB/USBTransfer.h>
|
|
#include <Kernel/Memory/MemoryManager.h>
|
|
|
|
namespace Kernel::USB {
|
|
|
|
RefPtr<Transfer> Transfer::try_create(Pipe& pipe, u16 len)
|
|
{
|
|
// Initialize data buffer for transfer
|
|
// This will definitely need to be refactored in the future, I doubt this will scale well...
|
|
auto data_buffer = MM.allocate_kernel_region(PAGE_SIZE, "USB Transfer Buffer", Memory::Region::Access::ReadWrite);
|
|
if (!data_buffer)
|
|
return {};
|
|
|
|
return try_make_ref_counted<Transfer>(pipe, len, data_buffer.release_nonnull());
|
|
}
|
|
|
|
Transfer::Transfer(Pipe& pipe, u16 len, NonnullOwnPtr<Memory::Region> data_buffer)
|
|
: m_pipe(pipe)
|
|
, m_data_buffer(move(data_buffer))
|
|
, m_transfer_data_size(len)
|
|
{
|
|
}
|
|
|
|
Transfer::~Transfer()
|
|
{
|
|
}
|
|
|
|
void Transfer::set_setup_packet(const USBRequestData& request)
|
|
{
|
|
// Kind of a nasty hack... Because the kernel isn't in the business
|
|
// of handing out physical pointers that we can directly write to,
|
|
// we set the address of the setup packet to be the first 8 bytes of
|
|
// the data buffer, which we then set to the physical address.
|
|
auto* request_data = reinterpret_cast<USBRequestData*>(buffer().as_ptr());
|
|
|
|
request_data->request_type = request.request_type;
|
|
request_data->request = request.request;
|
|
request_data->value = request.value;
|
|
request_data->index = request.index;
|
|
request_data->length = request.length;
|
|
|
|
m_request = request;
|
|
}
|
|
|
|
}
|