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Kernel/USB: Add a crude USB MassStorage driver :^)

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Hendiadyoin1 2023-09-15 21:15:30 +02:00 • committed by Andrew Kaster
parent c230a0d96f
commit 29292bbdbf
8 changed files with 615 additions and 0 deletions
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72
Kernel/Devices/Storage/USB/SCSIComands.h Normal file
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/*
* Copyright (c) 2023, Leon Albrecht <leon.a@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Endian.h>
#include <AK/StdLibExtraDetails.h>
#include <AK/Types.h>
// https://www.seagate.com/files/staticfiles/support/docs/manual/Interface%20manuals/100293068j.pdf
namespace Kernel::SCSI {
// 3.22.1
struct ReadCapacity10 {
u8 opcode { 0x25 };
u8 reserved1 { 0 };
BigEndian<u32> oboslete_logical_block_address { 0 };
u16 reserved2 { 0 };
u8 reserved3 { 0 };
u8 control { 0 };
};
static_assert(AssertSize<ReadCapacity10, 10>());
// 3.22.2
struct ReadCapacity10Parameters {
BigEndian<u32> block_count;
BigEndian<u32> block_size;
};
static_assert(AssertSize<ReadCapacity10Parameters, 8>());
// 3.16
struct Read10 {
u8 operation_code { 0x28 };
union {
u8 settings { 0 };
struct {
u8 obsolete : 2;
u8 rarc : 1;
u8 fua : 1;
u8 dpo : 1;
u8 rdprotect : 3;
};
};
BigEndian<u32> logical_block_address;
u8 group_number { 0 }; // only bottom 5 bits
BigEndian<u16> transfer_length;
u8 control { 0 };
};
static_assert(AssertSize<Read10, 10>());
// 3.60
struct Write10 {
u8 operation_code { 0x2A };
union {
u8 settings { 0 };
struct {
u8 obsolete : 2;
u8 reserved : 1;
u8 fua : 1;
u8 dpo : 1;
u8 wrprotect : 3;
};
};
BigEndian<u32> logical_block_address;
u8 group_number { 0 }; // only bottom 5 bits
BigEndian<u16> transfer_length;
u8 control { 0 };
};
static_assert(AssertSize<Read10, 10>());
}