Peter Barrett
A more capable USB Host. The API supports synchronous and Asynchronous control, interrupt and bulk transfers. It has built in support for hubs and hot plugging. It can support any number of devices and endpoints limited only by sram. The test shell supports mouse, keyboard and mass storage/fat.
MassStorage.cpp@0:5ad808014a49, 2010-04-02 (annotated)
- Committer:
- peterbarrett1967
- Date:
- Fri Apr 02 22:28:01 2010 +0000
- Revision:
- 0:5ad808014a49
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| peterbarrett1967 | 0:5ad808014a49 | 1 | |
| peterbarrett1967 | 0:5ad808014a49 | 2 | /* |
| peterbarrett1967 | 0:5ad808014a49 | 3 | Copyright (c) 2010 Peter Barrett |
| peterbarrett1967 | 0:5ad808014a49 | 4 | |
| peterbarrett1967 | 0:5ad808014a49 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| peterbarrett1967 | 0:5ad808014a49 | 6 | of this software and associated documentation files (the "Software"), to deal |
| peterbarrett1967 | 0:5ad808014a49 | 7 | in the Software without restriction, including without limitation the rights |
| peterbarrett1967 | 0:5ad808014a49 | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| peterbarrett1967 | 0:5ad808014a49 | 9 | copies of the Software, and to permit persons to whom the Software is |
| peterbarrett1967 | 0:5ad808014a49 | 10 | furnished to do so, subject to the following conditions: |
| peterbarrett1967 | 0:5ad808014a49 | 11 | |
| peterbarrett1967 | 0:5ad808014a49 | 12 | The above copyright notice and this permission notice shall be included in |
| peterbarrett1967 | 0:5ad808014a49 | 13 | all copies or substantial portions of the Software. |
| peterbarrett1967 | 0:5ad808014a49 | 14 | |
| peterbarrett1967 | 0:5ad808014a49 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| peterbarrett1967 | 0:5ad808014a49 | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| peterbarrett1967 | 0:5ad808014a49 | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| peterbarrett1967 | 0:5ad808014a49 | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| peterbarrett1967 | 0:5ad808014a49 | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| peterbarrett1967 | 0:5ad808014a49 | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| peterbarrett1967 | 0:5ad808014a49 | 21 | THE SOFTWARE. |
| peterbarrett1967 | 0:5ad808014a49 | 22 | */ |
| peterbarrett1967 | 0:5ad808014a49 | 23 | |
| peterbarrett1967 | 0:5ad808014a49 | 24 | #include "stdlib.h" |
| peterbarrett1967 | 0:5ad808014a49 | 25 | #include "stdio.h" |
| peterbarrett1967 | 0:5ad808014a49 | 26 | #include "string.h" |
| peterbarrett1967 | 0:5ad808014a49 | 27 | |
| peterbarrett1967 | 0:5ad808014a49 | 28 | #include "Utils.h" |
| peterbarrett1967 | 0:5ad808014a49 | 29 | #include "USBHost.h" |
| peterbarrett1967 | 0:5ad808014a49 | 30 | |
| peterbarrett1967 | 0:5ad808014a49 | 31 | |
| peterbarrett1967 | 0:5ad808014a49 | 32 | int MassStorage_ReadCapacity(int device, u32* blockCount, u32* blockSize); |
| peterbarrett1967 | 0:5ad808014a49 | 33 | int MassStorage_ReadBlock(int device, u32 block, u8* dst); |
| peterbarrett1967 | 0:5ad808014a49 | 34 | int MassStorage_WriteBlock(int device, u32 block, const u8* dst); |
| peterbarrett1967 | 0:5ad808014a49 | 35 | |
| peterbarrett1967 | 0:5ad808014a49 | 36 | |
| peterbarrett1967 | 0:5ad808014a49 | 37 | #define ERR_BAD_CSW_SIGNATURE -200 |
| peterbarrett1967 | 0:5ad808014a49 | 38 | |
| peterbarrett1967 | 0:5ad808014a49 | 39 | #define CBW_SIGNATURE 0x43425355 |
| peterbarrett1967 | 0:5ad808014a49 | 40 | #define CSW_SIGNATURE 0x53425355 |
| peterbarrett1967 | 0:5ad808014a49 | 41 | |
| peterbarrett1967 | 0:5ad808014a49 | 42 | // Command Block |
| peterbarrett1967 | 0:5ad808014a49 | 43 | typedef struct |
| peterbarrett1967 | 0:5ad808014a49 | 44 | { |
| peterbarrett1967 | 0:5ad808014a49 | 45 | u32 Signature; |
| peterbarrett1967 | 0:5ad808014a49 | 46 | u32 Tag; |
| peterbarrett1967 | 0:5ad808014a49 | 47 | u32 TransferLength; |
| peterbarrett1967 | 0:5ad808014a49 | 48 | u8 Flags; |
| peterbarrett1967 | 0:5ad808014a49 | 49 | u8 LUN; |
| peterbarrett1967 | 0:5ad808014a49 | 50 | u8 CBLength; |
| peterbarrett1967 | 0:5ad808014a49 | 51 | u8 CB[16]; // only 6 really |
| peterbarrett1967 | 0:5ad808014a49 | 52 | } CBW; |
| peterbarrett1967 | 0:5ad808014a49 | 53 | |
| peterbarrett1967 | 0:5ad808014a49 | 54 | // Status block |
| peterbarrett1967 | 0:5ad808014a49 | 55 | typedef struct |
| peterbarrett1967 | 0:5ad808014a49 | 56 | { |
| peterbarrett1967 | 0:5ad808014a49 | 57 | u32 Signature; |
| peterbarrett1967 | 0:5ad808014a49 | 58 | u32 Tag; |
| peterbarrett1967 | 0:5ad808014a49 | 59 | u32 DataResidue; |
| peterbarrett1967 | 0:5ad808014a49 | 60 | u8 Status; |
| peterbarrett1967 | 0:5ad808014a49 | 61 | } CSW; |
| peterbarrett1967 | 0:5ad808014a49 | 62 | |
| peterbarrett1967 | 0:5ad808014a49 | 63 | int SCSIRequestSense(int device); |
| peterbarrett1967 | 0:5ad808014a49 | 64 | |
| peterbarrett1967 | 0:5ad808014a49 | 65 | int DoSCSI(int device, const u8* cmd, int cmdLen, int flags, u8* data, u32 transferLen) |
| peterbarrett1967 | 0:5ad808014a49 | 66 | { |
| peterbarrett1967 | 0:5ad808014a49 | 67 | CBW cbw; |
| peterbarrett1967 | 0:5ad808014a49 | 68 | cbw.Signature = CBW_SIGNATURE; |
| peterbarrett1967 | 0:5ad808014a49 | 69 | cbw.Tag = 0; |
| peterbarrett1967 | 0:5ad808014a49 | 70 | cbw.TransferLength = transferLen; |
| peterbarrett1967 | 0:5ad808014a49 | 71 | cbw.Flags = flags; |
| peterbarrett1967 | 0:5ad808014a49 | 72 | cbw.LUN = 0; |
| peterbarrett1967 | 0:5ad808014a49 | 73 | cbw.CBLength = cmdLen; |
| peterbarrett1967 | 0:5ad808014a49 | 74 | memset(cbw.CB,0,sizeof(cbw.CB)); |
| peterbarrett1967 | 0:5ad808014a49 | 75 | memcpy(cbw.CB,cmd,cmdLen); |
| peterbarrett1967 | 0:5ad808014a49 | 76 | |
| peterbarrett1967 | 0:5ad808014a49 | 77 | int r; |
| peterbarrett1967 | 0:5ad808014a49 | 78 | r = USBBulkTransfer(device,0x01,(u8*)&cbw,31); // Send the command |
| peterbarrett1967 | 0:5ad808014a49 | 79 | if (r < 0) |
| peterbarrett1967 | 0:5ad808014a49 | 80 | return r; |
| peterbarrett1967 | 0:5ad808014a49 | 81 | |
| peterbarrett1967 | 0:5ad808014a49 | 82 | if (data) |
| peterbarrett1967 | 0:5ad808014a49 | 83 | { |
| peterbarrett1967 | 0:5ad808014a49 | 84 | r = USBBulkTransfer(device,flags | 1,data,transferLen); |
| peterbarrett1967 | 0:5ad808014a49 | 85 | if (r < 0) |
| peterbarrett1967 | 0:5ad808014a49 | 86 | return r; |
| peterbarrett1967 | 0:5ad808014a49 | 87 | } |
| peterbarrett1967 | 0:5ad808014a49 | 88 | |
| peterbarrett1967 | 0:5ad808014a49 | 89 | CSW csw; |
| peterbarrett1967 | 0:5ad808014a49 | 90 | csw.Signature = 0; |
| peterbarrett1967 | 0:5ad808014a49 | 91 | r = USBBulkTransfer(device,0x81,(u8*)&csw,13); |
| peterbarrett1967 | 0:5ad808014a49 | 92 | if (r < 0) |
| peterbarrett1967 | 0:5ad808014a49 | 93 | return r; |
| peterbarrett1967 | 0:5ad808014a49 | 94 | |
| peterbarrett1967 | 0:5ad808014a49 | 95 | if (csw.Signature != CSW_SIGNATURE) |
| peterbarrett1967 | 0:5ad808014a49 | 96 | return ERR_BAD_CSW_SIGNATURE; |
| peterbarrett1967 | 0:5ad808014a49 | 97 | |
| peterbarrett1967 | 0:5ad808014a49 | 98 | // ModeSense? |
| peterbarrett1967 | 0:5ad808014a49 | 99 | if (csw.Status == 1 && cmd[0] != 3) |
| peterbarrett1967 | 0:5ad808014a49 | 100 | return SCSIRequestSense(device); |
| peterbarrett1967 | 0:5ad808014a49 | 101 | |
| peterbarrett1967 | 0:5ad808014a49 | 102 | return csw.Status; |
| peterbarrett1967 | 0:5ad808014a49 | 103 | } |
| peterbarrett1967 | 0:5ad808014a49 | 104 | |
| peterbarrett1967 | 0:5ad808014a49 | 105 | int SCSITestUnitReady(int device) |
| peterbarrett1967 | 0:5ad808014a49 | 106 | { |
| peterbarrett1967 | 0:5ad808014a49 | 107 | u8 cmd[6]; |
| peterbarrett1967 | 0:5ad808014a49 | 108 | memset(cmd,0,6); |
| peterbarrett1967 | 0:5ad808014a49 | 109 | return DoSCSI(device,cmd,6,DEVICE_TO_HOST,0,0); |
| peterbarrett1967 | 0:5ad808014a49 | 110 | } |
| peterbarrett1967 | 0:5ad808014a49 | 111 | |
| peterbarrett1967 | 0:5ad808014a49 | 112 | int SCSIRequestSense(int device) |
| peterbarrett1967 | 0:5ad808014a49 | 113 | { |
| peterbarrett1967 | 0:5ad808014a49 | 114 | u8 cmd[6] = {0x03,0,0,0,18,0}; |
| peterbarrett1967 | 0:5ad808014a49 | 115 | u8 result[18]; |
| peterbarrett1967 | 0:5ad808014a49 | 116 | int r = DoSCSI(device,cmd,6,DEVICE_TO_HOST,result,18); |
| peterbarrett1967 | 0:5ad808014a49 | 117 | return r; |
| peterbarrett1967 | 0:5ad808014a49 | 118 | } |
| peterbarrett1967 | 0:5ad808014a49 | 119 | |
| peterbarrett1967 | 0:5ad808014a49 | 120 | int SCSIInquiry(int device) |
| peterbarrett1967 | 0:5ad808014a49 | 121 | { |
| peterbarrett1967 | 0:5ad808014a49 | 122 | u8 cmd[6] = {0x12,0,0,0,36,0}; |
| peterbarrett1967 | 0:5ad808014a49 | 123 | u8 result[36+2]; |
| peterbarrett1967 | 0:5ad808014a49 | 124 | result[36] = '\n'; |
| peterbarrett1967 | 0:5ad808014a49 | 125 | result[37] = 0; |
| peterbarrett1967 | 0:5ad808014a49 | 126 | int r = DoSCSI(device,cmd,6,DEVICE_TO_HOST,result,36); |
| peterbarrett1967 | 0:5ad808014a49 | 127 | if (r == 0) |
| peterbarrett1967 | 0:5ad808014a49 | 128 | printf((const char*)result + 8); |
| peterbarrett1967 | 0:5ad808014a49 | 129 | return r; |
| peterbarrett1967 | 0:5ad808014a49 | 130 | } |
| peterbarrett1967 | 0:5ad808014a49 | 131 | |
| peterbarrett1967 | 0:5ad808014a49 | 132 | int SCSIReadCapacity(int device, u32* blockCount, u32* blockSize) |
| peterbarrett1967 | 0:5ad808014a49 | 133 | { |
| peterbarrett1967 | 0:5ad808014a49 | 134 | u8 cmd[10] = {0x25,0,0,0,8,0,0,0,0,0}; |
| peterbarrett1967 | 0:5ad808014a49 | 135 | u8 result[8]; |
| peterbarrett1967 | 0:5ad808014a49 | 136 | *blockSize = 0; |
| peterbarrett1967 | 0:5ad808014a49 | 137 | *blockCount = 0; |
| peterbarrett1967 | 0:5ad808014a49 | 138 | int r = DoSCSI(device,cmd,10,DEVICE_TO_HOST,result,8); |
| peterbarrett1967 | 0:5ad808014a49 | 139 | if (r == 0) |
| peterbarrett1967 | 0:5ad808014a49 | 140 | { |
| peterbarrett1967 | 0:5ad808014a49 | 141 | *blockCount = BE32(result); |
| peterbarrett1967 | 0:5ad808014a49 | 142 | *blockSize = BE32(result+4); |
| peterbarrett1967 | 0:5ad808014a49 | 143 | } |
| peterbarrett1967 | 0:5ad808014a49 | 144 | return r; |
| peterbarrett1967 | 0:5ad808014a49 | 145 | } |
| peterbarrett1967 | 0:5ad808014a49 | 146 | |
| peterbarrett1967 | 0:5ad808014a49 | 147 | int SCSITransfer(int device, u32 blockAddr, u32 blockCount, u8* dst, u32 blockSize, int direction) |
| peterbarrett1967 | 0:5ad808014a49 | 148 | { |
| peterbarrett1967 | 0:5ad808014a49 | 149 | // USB hardware will only do 4k per transfer |
| peterbarrett1967 | 0:5ad808014a49 | 150 | while (blockCount*blockSize > 4096) |
| peterbarrett1967 | 0:5ad808014a49 | 151 | { |
| peterbarrett1967 | 0:5ad808014a49 | 152 | int count = 4096/blockSize; |
| peterbarrett1967 | 0:5ad808014a49 | 153 | int r = SCSITransfer(device,blockAddr,count,dst,blockSize,direction); |
| peterbarrett1967 | 0:5ad808014a49 | 154 | dst += count*blockSize; |
| peterbarrett1967 | 0:5ad808014a49 | 155 | blockAddr += count; |
| peterbarrett1967 | 0:5ad808014a49 | 156 | blockCount -= count; |
| peterbarrett1967 | 0:5ad808014a49 | 157 | } |
| peterbarrett1967 | 0:5ad808014a49 | 158 | |
| peterbarrett1967 | 0:5ad808014a49 | 159 | u8 cmd[10]; |
| peterbarrett1967 | 0:5ad808014a49 | 160 | memset(cmd,0,10); |
| peterbarrett1967 | 0:5ad808014a49 | 161 | cmd[0] = (direction == DEVICE_TO_HOST) ? 0x28 : 0x2A; |
| peterbarrett1967 | 0:5ad808014a49 | 162 | BE32(blockAddr,cmd+2); |
| peterbarrett1967 | 0:5ad808014a49 | 163 | BE16(blockCount,cmd+7); |
| peterbarrett1967 | 0:5ad808014a49 | 164 | return DoSCSI(device,cmd,10,direction,dst,blockSize*blockCount); |
| peterbarrett1967 | 0:5ad808014a49 | 165 | } |
| peterbarrett1967 | 0:5ad808014a49 | 166 | |
| peterbarrett1967 | 0:5ad808014a49 | 167 | int MassStorage_ReadCapacity(int device, u32* blockCount, u32* blockSize) |
| peterbarrett1967 | 0:5ad808014a49 | 168 | { |
| peterbarrett1967 | 0:5ad808014a49 | 169 | return SCSIReadCapacity(device,blockCount,blockSize); |
| peterbarrett1967 | 0:5ad808014a49 | 170 | } |
| peterbarrett1967 | 0:5ad808014a49 | 171 | |
| peterbarrett1967 | 0:5ad808014a49 | 172 | int MassStorage_Read(int device, u32 blockAddr, u32 blockCount, u8* dst, u32 blockSize = 512) |
| peterbarrett1967 | 0:5ad808014a49 | 173 | { |
| peterbarrett1967 | 0:5ad808014a49 | 174 | return SCSITransfer(device,blockAddr,blockCount,dst,blockSize,DEVICE_TO_HOST); |
| peterbarrett1967 | 0:5ad808014a49 | 175 | } |
| peterbarrett1967 | 0:5ad808014a49 | 176 | |
| peterbarrett1967 | 0:5ad808014a49 | 177 | int MassStorage_Write(int device, u32 blockAddr, u32 blockCount, u8* dst, u32 blockSize = 512) |
| peterbarrett1967 | 0:5ad808014a49 | 178 | { |
| peterbarrett1967 | 0:5ad808014a49 | 179 | return SCSITransfer(device,blockAddr,blockCount,dst,blockSize,HOST_TO_DEVICE); |
| peterbarrett1967 | 0:5ad808014a49 | 180 | } |