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Kernel/USB: Add support for bulk transfers

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b14ckcat 2022-05-08 01:36:20 -04:00 • committed by Andreas Kling
parent 6a3f959e92
commit 8a7876d65c
7 changed files with 80 additions and 0 deletions
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21
Kernel/Bus/USB/USBPipe.cpp
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@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StdLibExtras.h>
#include <Kernel/Bus/USB/PacketTypes.h>
#include <Kernel/Bus/USB/UHCI/UHCIController.h>
#include <Kernel/Bus/USB/USBPipe.h>
@ -71,4 +72,24 @@ ErrorOr<size_t> Pipe::control_transfer(u8 request_type, u8 request, u16 value, u
return transfer_length;
}
ErrorOr<size_t> Pipe::bulk_transfer(u16 length, void* data)
{
size_t transfer_length = 0;
auto transfer = TRY(Transfer::try_create(*this, length));
if (m_direction == Direction::In) {
dbgln_if(USB_DEBUG, "Pipe: Bulk in transfer allocated @ {}", transfer->buffer_physical());
transfer_length = TRY(m_controller->submit_bulk_transfer(*transfer));
memcpy(data, transfer->buffer().as_ptr(), min(length, transfer_length));
dbgln_if(USB_DEBUG, "Pipe: Bulk in transfer complete!");
} else if (m_direction == Direction::Out) {
TRY(transfer->write_buffer(length, data));
dbgln_if(USB_DEBUG, "Pipe: Bulk out transfer allocated @ {}", transfer->buffer_physical());
transfer_length = TRY(m_controller->submit_bulk_transfer(*transfer));
dbgln_if(USB_DEBUG, "Pipe: Bulk out transfer complete!");
}
return transfer_length;
}
}