Suga koubou
Dependencies: ChaNFSSD mbed ChaNFS
msc_scsi.cpp@1:efbcfbae4747, 2011-11-10 (annotated)
- Committer:
- okini3939
- Date:
- Thu Nov 10 03:20:42 2011 +0000
- Revision:
- 1:efbcfbae4747
- Parent:
- 0:02c293160df3
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| okini3939 | 0:02c293160df3 | 1 | /* |
| okini3939 | 0:02c293160df3 | 2 | LPCUSB, an USB device driver for LPC microcontrollers |
| okini3939 | 0:02c293160df3 | 3 | Copyright (C) 2006 Bertrik Sikken (bertrik@sikken.nl) |
| okini3939 | 0:02c293160df3 | 4 | |
| okini3939 | 0:02c293160df3 | 5 | Redistribution and use in source and binary forms, with or without |
| okini3939 | 0:02c293160df3 | 6 | modification, are permitted provided that the following conditions are met: |
| okini3939 | 0:02c293160df3 | 7 | |
| okini3939 | 0:02c293160df3 | 8 | 1. Redistributions of source code must retain the above copyright |
| okini3939 | 0:02c293160df3 | 9 | notice, this list of conditions and the following disclaimer. |
| okini3939 | 0:02c293160df3 | 10 | 2. Redistributions in binary form must reproduce the above copyright |
| okini3939 | 0:02c293160df3 | 11 | notice, this list of conditions and the following disclaimer in the |
| okini3939 | 0:02c293160df3 | 12 | documentation and/or other materials provided with the distribution. |
| okini3939 | 0:02c293160df3 | 13 | 3. The name of the author may not be used to endorse or promote products |
| okini3939 | 0:02c293160df3 | 14 | derived from this software without specific prior written permission. |
| okini3939 | 0:02c293160df3 | 15 | |
| okini3939 | 0:02c293160df3 | 16 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| okini3939 | 0:02c293160df3 | 17 | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| okini3939 | 0:02c293160df3 | 18 | OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| okini3939 | 0:02c293160df3 | 19 | IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| okini3939 | 0:02c293160df3 | 20 | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| okini3939 | 0:02c293160df3 | 21 | NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| okini3939 | 0:02c293160df3 | 22 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| okini3939 | 0:02c293160df3 | 23 | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| okini3939 | 0:02c293160df3 | 24 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| okini3939 | 0:02c293160df3 | 25 | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| okini3939 | 0:02c293160df3 | 26 | */ |
| okini3939 | 0:02c293160df3 | 27 | |
| okini3939 | 0:02c293160df3 | 28 | /** |
| okini3939 | 0:02c293160df3 | 29 | @file |
| okini3939 | 0:02c293160df3 | 30 | |
| okini3939 | 0:02c293160df3 | 31 | This is the SCSI layer of the USB mass storage application example. |
| okini3939 | 0:02c293160df3 | 32 | This layer depends directly on the blockdev layer. |
| okini3939 | 0:02c293160df3 | 33 | |
| okini3939 | 0:02c293160df3 | 34 | Windows peculiarities: |
| okini3939 | 0:02c293160df3 | 35 | * Size of REQUEST SENSE CDB is 12 bytes instead of expected 6 |
| okini3939 | 0:02c293160df3 | 36 | * Windows requires VERIFY(10) command to do a format. |
| okini3939 | 0:02c293160df3 | 37 | This command is not mandatory in the SBC/SBC-2 specification. |
| okini3939 | 0:02c293160df3 | 38 | */ |
| okini3939 | 0:02c293160df3 | 39 | /* |
| okini3939 | 0:02c293160df3 | 40 | * Modified for mbed NXP LPC1768 & LPCXpresso board |
| okini3939 | 0:02c293160df3 | 41 | * original LPC214x USB stack beta by bertrik |
| okini3939 | 0:02c293160df3 | 42 | * target-20070727.tar.gr (119.5KB) |
| okini3939 | 0:02c293160df3 | 43 | * http://sourceforge.net/projects/lpcusb/ |
| okini3939 | 0:02c293160df3 | 44 | * By Kenji Arai / JH1PJL on September 25th, 2010 |
| okini3939 | 0:02c293160df3 | 45 | * October 3rd, 2010 |
| okini3939 | 0:02c293160df3 | 46 | */ |
| okini3939 | 0:02c293160df3 | 47 | #define FATFS |
| okini3939 | 0:02c293160df3 | 48 | |
| okini3939 | 0:02c293160df3 | 49 | //#define DEBUG |
| okini3939 | 0:02c293160df3 | 50 | #include "dbg.h" |
| okini3939 | 0:02c293160df3 | 51 | #include "mbed.h" |
| okini3939 | 0:02c293160df3 | 52 | #include <string.h> // memcpy |
| okini3939 | 0:02c293160df3 | 53 | |
| okini3939 | 0:02c293160df3 | 54 | #include "blockdev.h" |
| okini3939 | 0:02c293160df3 | 55 | #include "msc_scsi.h" |
| okini3939 | 0:02c293160df3 | 56 | |
| okini3939 | 0:02c293160df3 | 57 | //#include "SDFileSystem.h" |
| okini3939 | 0:02c293160df3 | 58 | //extern SDFileSystem sd; |
| okini3939 | 0:02c293160df3 | 59 | |
| okini3939 | 0:02c293160df3 | 60 | #define BLOCKSIZE 512 |
| okini3939 | 0:02c293160df3 | 61 | |
| okini3939 | 0:02c293160df3 | 62 | // SBC2 mandatory SCSI commands |
| okini3939 | 0:02c293160df3 | 63 | #define SCSI_CMD_TEST_UNIT_READY 0x00 |
| okini3939 | 0:02c293160df3 | 64 | #define SCSI_CMD_REQUEST_SENSE 0x03 |
| okini3939 | 0:02c293160df3 | 65 | #define SCSI_CMD_FORMAT_UNIT 0x04 |
| okini3939 | 0:02c293160df3 | 66 | #define SCSI_CMD_READ_6 0x08 /* not implemented yet */ |
| okini3939 | 0:02c293160df3 | 67 | #define SCSI_CMD_INQUIRY 0x12 |
| okini3939 | 0:02c293160df3 | 68 | #define SCSI_CMD_SEND_DIAGNOSTIC 0x1D /* not implemented yet */ |
| okini3939 | 0:02c293160df3 | 69 | #define SCSI_CMD_READ_CAPACITY_10 0x25 |
| okini3939 | 0:02c293160df3 | 70 | #define SCSI_CMD_READ_10 0x28 |
| okini3939 | 0:02c293160df3 | 71 | #define SCSI_CMD_REPORT_LUNS 0xA0 /* not implemented yet */ |
| okini3939 | 0:02c293160df3 | 72 | |
| okini3939 | 0:02c293160df3 | 73 | // SBC2 optional SCSI commands |
| okini3939 | 0:02c293160df3 | 74 | #define SCSI_CMD_WRITE_6 0x0A /* not implemented yet */ |
| okini3939 | 0:02c293160df3 | 75 | #define SCSI_CMD_WRITE_10 0x2A |
| okini3939 | 0:02c293160df3 | 76 | #define SCSI_CMD_VERIFY_10 0x2F /* required for windows format */ |
| okini3939 | 0:02c293160df3 | 77 | |
| okini3939 | 0:02c293160df3 | 78 | // sense codes |
| okini3939 | 0:02c293160df3 | 79 | #define WRITE_ERROR 0x030C00 |
| okini3939 | 0:02c293160df3 | 80 | #define READ_ERROR 0x031100 |
| okini3939 | 0:02c293160df3 | 81 | #define INVALID_CMD_OPCODE 0x052000 |
| okini3939 | 0:02c293160df3 | 82 | #define INVALID_FIELD_IN_CDB 0x052400 |
| okini3939 | 0:02c293160df3 | 83 | |
| okini3939 | 0:02c293160df3 | 84 | // Sense code, which is set on error conditions |
| okini3939 | 0:02c293160df3 | 85 | static uint32_t dwSense; // hex: 00aabbcc, where aa=KEY, bb=ASC, cc=ASCQ |
| okini3939 | 0:02c293160df3 | 86 | |
| okini3939 | 0:02c293160df3 | 87 | static const uint8_t abInquiry[] = { |
| okini3939 | 0:02c293160df3 | 88 | 0x00, // PDT = direct-access device |
| okini3939 | 0:02c293160df3 | 89 | 0x80, // removeable medium bit = set |
| okini3939 | 0:02c293160df3 | 90 | 0x05, // version = complies to SPC3 |
| okini3939 | 0:02c293160df3 | 91 | 0x02, // response data format = SPC3 |
| okini3939 | 0:02c293160df3 | 92 | 0x1F, // additional length |
| okini3939 | 0:02c293160df3 | 93 | 0x00, |
| okini3939 | 0:02c293160df3 | 94 | 0x00, |
| okini3939 | 0:02c293160df3 | 95 | 0x00, |
| okini3939 | 0:02c293160df3 | 96 | 'L','P','C','U','S','B',' ',' ', // vendor |
| okini3939 | 0:02c293160df3 | 97 | 'M','a','s','s',' ','s','t','o', // product |
| okini3939 | 0:02c293160df3 | 98 | 'r','a','g','e',' ',' ',' ',' ', |
| okini3939 | 0:02c293160df3 | 99 | '0','.','1',' ' // revision |
| okini3939 | 0:02c293160df3 | 100 | }; |
| okini3939 | 0:02c293160df3 | 101 | |
| okini3939 | 0:02c293160df3 | 102 | // Data for "request sense" command. The 0xFF are filled in later |
| okini3939 | 0:02c293160df3 | 103 | static const uint8_t abSense[] = { 0x70, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x0A, |
| okini3939 | 0:02c293160df3 | 104 | 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, |
| okini3939 | 0:02c293160df3 | 105 | 0x00, 0x00 }; |
| okini3939 | 0:02c293160df3 | 106 | |
| okini3939 | 0:02c293160df3 | 107 | // Buffer for holding one block of disk data |
| okini3939 | 0:02c293160df3 | 108 | static uint8_t abBlockBuf[512]; |
| okini3939 | 0:02c293160df3 | 109 | |
| okini3939 | 0:02c293160df3 | 110 | |
| okini3939 | 0:02c293160df3 | 111 | struct TCDB6 { |
| okini3939 | 0:02c293160df3 | 112 | uint8_t bOperationCode; |
| okini3939 | 0:02c293160df3 | 113 | uint8_t abLBA[3]; |
| okini3939 | 0:02c293160df3 | 114 | uint8_t bLength; |
| okini3939 | 0:02c293160df3 | 115 | uint8_t bControl; |
| okini3939 | 0:02c293160df3 | 116 | } __attribute__((packed)); |
| okini3939 | 0:02c293160df3 | 117 | |
| okini3939 | 0:02c293160df3 | 118 | |
| okini3939 | 0:02c293160df3 | 119 | /************************************************************************* |
| okini3939 | 0:02c293160df3 | 120 | SCSIReset |
| okini3939 | 0:02c293160df3 | 121 | ========= |
| okini3939 | 0:02c293160df3 | 122 | Resets any SCSI state |
| okini3939 | 0:02c293160df3 | 123 | |
| okini3939 | 0:02c293160df3 | 124 | **************************************************************************/ |
| okini3939 | 0:02c293160df3 | 125 | void SCSIReset(void) |
| okini3939 | 0:02c293160df3 | 126 | { |
| okini3939 | 0:02c293160df3 | 127 | dwSense = 0; |
| okini3939 | 0:02c293160df3 | 128 | } |
| okini3939 | 0:02c293160df3 | 129 | |
| okini3939 | 0:02c293160df3 | 130 | |
| okini3939 | 0:02c293160df3 | 131 | /************************************************************************* |
| okini3939 | 0:02c293160df3 | 132 | SCSIHandleCmd |
| okini3939 | 0:02c293160df3 | 133 | ============= |
| okini3939 | 0:02c293160df3 | 134 | Verifies a SCSI CDB and indicates the direction and amount of data |
| okini3939 | 0:02c293160df3 | 135 | that the device wants to transfer. |
| okini3939 | 0:02c293160df3 | 136 | |
| okini3939 | 0:02c293160df3 | 137 | If this call fails, a sense code is set in dwSense. |
| okini3939 | 0:02c293160df3 | 138 | |
| okini3939 | 0:02c293160df3 | 139 | IN pbCDB Command data block |
| okini3939 | 0:02c293160df3 | 140 | iCDBLen Command data block len |
| okini3939 | 0:02c293160df3 | 141 | OUT *piRspLen Length of intended response data: |
| okini3939 | 0:02c293160df3 | 142 | *pfDevIn true if data is transferred from device-to-host |
| okini3939 | 0:02c293160df3 | 143 | |
| okini3939 | 0:02c293160df3 | 144 | Returns a pointer to the data exchange buffer if successful, |
| okini3939 | 0:02c293160df3 | 145 | return NULL otherwise. |
| okini3939 | 0:02c293160df3 | 146 | **************************************************************************/ |
| okini3939 | 0:02c293160df3 | 147 | uint8_t * SCSIHandleCmd(uint8_t *pbCDB, uint8_t iCDBLen, int *piRspLen, bool *pfDevIn) |
| okini3939 | 0:02c293160df3 | 148 | { |
| okini3939 | 0:02c293160df3 | 149 | static const uint8_t aiCDBLen[] = {6, 10, 10, 0, 16, 12, 0, 0}; |
| okini3939 | 0:02c293160df3 | 150 | int i; |
| okini3939 | 0:02c293160df3 | 151 | TCDB6 *pCDB; |
| okini3939 | 0:02c293160df3 | 152 | uint32_t dwLen, dwLBA; |
| okini3939 | 0:02c293160df3 | 153 | uint8_t bGroupCode; |
| okini3939 | 0:02c293160df3 | 154 | |
| okini3939 | 0:02c293160df3 | 155 | pCDB = (TCDB6 *)pbCDB; |
| okini3939 | 0:02c293160df3 | 156 | |
| okini3939 | 0:02c293160df3 | 157 | // default direction is from device to host |
| okini3939 | 0:02c293160df3 | 158 | *pfDevIn = true; |
| okini3939 | 0:02c293160df3 | 159 | |
| okini3939 | 0:02c293160df3 | 160 | // check CDB length |
| okini3939 | 0:02c293160df3 | 161 | bGroupCode = (pCDB->bOperationCode >> 5) & 0x7; |
| okini3939 | 0:02c293160df3 | 162 | if (iCDBLen < aiCDBLen[bGroupCode]) { |
| okini3939 | 0:02c293160df3 | 163 | DBG("Invalid CBD len (expected %d)!\n", aiCDBLen[bGroupCode]); |
| okini3939 | 0:02c293160df3 | 164 | return NULL; |
| okini3939 | 0:02c293160df3 | 165 | } |
| okini3939 | 0:02c293160df3 | 166 | |
| okini3939 | 0:02c293160df3 | 167 | switch (pCDB->bOperationCode) { |
| okini3939 | 0:02c293160df3 | 168 | |
| okini3939 | 0:02c293160df3 | 169 | // test unit ready (6) |
| okini3939 | 0:02c293160df3 | 170 | case SCSI_CMD_TEST_UNIT_READY: |
| okini3939 | 0:02c293160df3 | 171 | DBG("TEST UNIT READY\n"); |
| okini3939 | 0:02c293160df3 | 172 | *piRspLen = 0; |
| okini3939 | 0:02c293160df3 | 173 | break; |
| okini3939 | 0:02c293160df3 | 174 | |
| okini3939 | 0:02c293160df3 | 175 | // request sense (6) |
| okini3939 | 0:02c293160df3 | 176 | case SCSI_CMD_REQUEST_SENSE: |
| okini3939 | 0:02c293160df3 | 177 | DBG("REQUEST SENSE (%06X)\n", dwSense); |
| okini3939 | 0:02c293160df3 | 178 | // check params |
| okini3939 | 0:02c293160df3 | 179 | *piRspLen = MIN(18, pCDB->bLength); |
| okini3939 | 0:02c293160df3 | 180 | break; |
| okini3939 | 0:02c293160df3 | 181 | |
| okini3939 | 0:02c293160df3 | 182 | case SCSI_CMD_FORMAT_UNIT: |
| okini3939 | 0:02c293160df3 | 183 | DBG("FORMAT UNIT %02X\n", pbCDB[1]); |
| okini3939 | 0:02c293160df3 | 184 | *piRspLen = 0; |
| okini3939 | 0:02c293160df3 | 185 | break; |
| okini3939 | 0:02c293160df3 | 186 | |
| okini3939 | 0:02c293160df3 | 187 | // inquiry (6) |
| okini3939 | 0:02c293160df3 | 188 | case SCSI_CMD_INQUIRY: |
| okini3939 | 0:02c293160df3 | 189 | DBG("INQUIRY\n"); |
| okini3939 | 0:02c293160df3 | 190 | // see SPC3r23, 4.3.4.6 |
| okini3939 | 0:02c293160df3 | 191 | *piRspLen = MIN(36, pCDB->bLength); |
| okini3939 | 0:02c293160df3 | 192 | break; |
| okini3939 | 0:02c293160df3 | 193 | |
| okini3939 | 0:02c293160df3 | 194 | // read capacity (10) |
| okini3939 | 0:02c293160df3 | 195 | case SCSI_CMD_READ_CAPACITY_10: |
| okini3939 | 0:02c293160df3 | 196 | DBG("READ CAPACITY\n"); |
| okini3939 | 0:02c293160df3 | 197 | *piRspLen = 8; |
| okini3939 | 0:02c293160df3 | 198 | break; |
| okini3939 | 0:02c293160df3 | 199 | |
| okini3939 | 0:02c293160df3 | 200 | // read (10) |
| okini3939 | 0:02c293160df3 | 201 | case SCSI_CMD_READ_10: |
| okini3939 | 0:02c293160df3 | 202 | dwLBA = (pbCDB[2] << 24) | (pbCDB[3] << 16) | (pbCDB[4] << 8) | (pbCDB[5]); |
| okini3939 | 0:02c293160df3 | 203 | dwLen = (pbCDB[7] << 8) | pbCDB[8]; |
| okini3939 | 0:02c293160df3 | 204 | DBG("READ10, LBA=%d, len=%d\n", dwLBA, dwLen); |
| okini3939 | 0:02c293160df3 | 205 | *piRspLen = dwLen * BLOCKSIZE; |
| okini3939 | 0:02c293160df3 | 206 | break; |
| okini3939 | 0:02c293160df3 | 207 | |
| okini3939 | 0:02c293160df3 | 208 | // write (10) |
| okini3939 | 0:02c293160df3 | 209 | case SCSI_CMD_WRITE_10: |
| okini3939 | 0:02c293160df3 | 210 | dwLBA = (pbCDB[2] << 24) | (pbCDB[3] << 16) | (pbCDB[4] << 8) | (pbCDB[5]); |
| okini3939 | 0:02c293160df3 | 211 | dwLen = (pbCDB[7] << 8) | pbCDB[8]; |
| okini3939 | 0:02c293160df3 | 212 | DBG("WRITE10, LBA=%d, len=%d\n", dwLBA, dwLen); |
| okini3939 | 0:02c293160df3 | 213 | *piRspLen = dwLen * BLOCKSIZE; |
| okini3939 | 0:02c293160df3 | 214 | *pfDevIn = false; |
| okini3939 | 0:02c293160df3 | 215 | break; |
| okini3939 | 0:02c293160df3 | 216 | |
| okini3939 | 0:02c293160df3 | 217 | case SCSI_CMD_VERIFY_10: |
| okini3939 | 0:02c293160df3 | 218 | DBG("VERIFY10\n"); |
| okini3939 | 0:02c293160df3 | 219 | if ((pbCDB[1] & (1 << 1)) != 0) { |
| okini3939 | 0:02c293160df3 | 220 | // we don't support BYTCHK |
| okini3939 | 0:02c293160df3 | 221 | DBG("BYTCHK not supported\n"); |
| okini3939 | 0:02c293160df3 | 222 | return NULL; |
| okini3939 | 0:02c293160df3 | 223 | } |
| okini3939 | 0:02c293160df3 | 224 | *piRspLen = 0; |
| okini3939 | 0:02c293160df3 | 225 | break; |
| okini3939 | 0:02c293160df3 | 226 | |
| okini3939 | 0:02c293160df3 | 227 | default: |
| okini3939 | 0:02c293160df3 | 228 | DBG("Unhandled SCSI: "); |
| okini3939 | 0:02c293160df3 | 229 | for (i = 0; i < iCDBLen; i++) { |
| okini3939 | 0:02c293160df3 | 230 | DBG(" %02X", pbCDB[i]); |
| okini3939 | 0:02c293160df3 | 231 | } |
| okini3939 | 0:02c293160df3 | 232 | DBG("\n"); |
| okini3939 | 0:02c293160df3 | 233 | // unsupported command |
| okini3939 | 0:02c293160df3 | 234 | dwSense = INVALID_CMD_OPCODE; |
| okini3939 | 0:02c293160df3 | 235 | *piRspLen = 0; |
| okini3939 | 0:02c293160df3 | 236 | return NULL; |
| okini3939 | 0:02c293160df3 | 237 | } |
| okini3939 | 0:02c293160df3 | 238 | |
| okini3939 | 0:02c293160df3 | 239 | |
| okini3939 | 0:02c293160df3 | 240 | return abBlockBuf; |
| okini3939 | 0:02c293160df3 | 241 | } |
| okini3939 | 0:02c293160df3 | 242 | |
| okini3939 | 0:02c293160df3 | 243 | |
| okini3939 | 0:02c293160df3 | 244 | /************************************************************************* |
| okini3939 | 0:02c293160df3 | 245 | SCSIHandleData |
| okini3939 | 0:02c293160df3 | 246 | ============== |
| okini3939 | 0:02c293160df3 | 247 | Handles a block of SCSI data. |
| okini3939 | 0:02c293160df3 | 248 | |
| okini3939 | 0:02c293160df3 | 249 | IN pbCDB Command data block |
| okini3939 | 0:02c293160df3 | 250 | iCDBLen Command data block len |
| okini3939 | 0:02c293160df3 | 251 | IN/OUT pbData Data buffer |
| okini3939 | 0:02c293160df3 | 252 | IN dwOffset Offset in data |
| okini3939 | 0:02c293160df3 | 253 | |
| okini3939 | 0:02c293160df3 | 254 | Returns a pointer to the next data to be exchanged if successful, |
| okini3939 | 0:02c293160df3 | 255 | returns NULL otherwise. |
| okini3939 | 0:02c293160df3 | 256 | **************************************************************************/ |
| okini3939 | 0:02c293160df3 | 257 | uint8_t * SCSIHandleData(uint8_t *pbCDB, uint8_t iCDBLen, uint8_t *pbData, uint32_t dwOffset) |
| okini3939 | 0:02c293160df3 | 258 | { |
| okini3939 | 0:02c293160df3 | 259 | TCDB6 *pCDB; |
| okini3939 | 0:02c293160df3 | 260 | uint32_t dwLBA; |
| okini3939 | 0:02c293160df3 | 261 | uint32_t dwBufPos, dwBlockNr; |
| okini3939 | 0:02c293160df3 | 262 | uint32_t dwDevSize, dwMaxBlock; |
| okini3939 | 0:02c293160df3 | 263 | |
| okini3939 | 0:02c293160df3 | 264 | pCDB = (TCDB6 *)pbCDB; |
| okini3939 | 0:02c293160df3 | 265 | |
| okini3939 | 0:02c293160df3 | 266 | switch (pCDB->bOperationCode) { |
| okini3939 | 0:02c293160df3 | 267 | |
| okini3939 | 0:02c293160df3 | 268 | // test unit ready |
| okini3939 | 0:02c293160df3 | 269 | case SCSI_CMD_TEST_UNIT_READY: |
| okini3939 | 0:02c293160df3 | 270 | if (dwSense != 0) { |
| okini3939 | 0:02c293160df3 | 271 | return NULL; |
| okini3939 | 0:02c293160df3 | 272 | } |
| okini3939 | 0:02c293160df3 | 273 | break; |
| okini3939 | 0:02c293160df3 | 274 | |
| okini3939 | 0:02c293160df3 | 275 | // request sense |
| okini3939 | 0:02c293160df3 | 276 | case SCSI_CMD_REQUEST_SENSE: |
| okini3939 | 0:02c293160df3 | 277 | memcpy(pbData, abSense, 18); |
| okini3939 | 0:02c293160df3 | 278 | // fill in KEY/ASC/ASCQ |
| okini3939 | 0:02c293160df3 | 279 | pbData[2] = (dwSense >> 16) & 0xFF; |
| okini3939 | 0:02c293160df3 | 280 | pbData[12] = (dwSense >> 8) & 0xFF; |
| okini3939 | 0:02c293160df3 | 281 | pbData[13] = (dwSense >> 0) & 0xFF; |
| okini3939 | 0:02c293160df3 | 282 | // reset sense data |
| okini3939 | 0:02c293160df3 | 283 | dwSense = 0; |
| okini3939 | 0:02c293160df3 | 284 | break; |
| okini3939 | 0:02c293160df3 | 285 | |
| okini3939 | 0:02c293160df3 | 286 | case SCSI_CMD_FORMAT_UNIT: |
| okini3939 | 0:02c293160df3 | 287 | // nothing to do, ignore this command |
| okini3939 | 0:02c293160df3 | 288 | break; |
| okini3939 | 0:02c293160df3 | 289 | |
| okini3939 | 0:02c293160df3 | 290 | // inquiry |
| okini3939 | 0:02c293160df3 | 291 | case SCSI_CMD_INQUIRY: |
| okini3939 | 0:02c293160df3 | 292 | memcpy(pbData, abInquiry, sizeof(abInquiry)); |
| okini3939 | 0:02c293160df3 | 293 | break; |
| okini3939 | 0:02c293160df3 | 294 | |
| okini3939 | 0:02c293160df3 | 295 | // read capacity |
| okini3939 | 0:02c293160df3 | 296 | case SCSI_CMD_READ_CAPACITY_10: |
| okini3939 | 0:02c293160df3 | 297 | #ifdef FATFS |
| okini3939 | 0:02c293160df3 | 298 | // get size of drive (bytes) |
| okini3939 | 0:02c293160df3 | 299 | dwDevSize = BlockDevGetSize(); |
| okini3939 | 0:02c293160df3 | 300 | // dwDevSize = sd.disk_sectors() * 512; |
| okini3939 | 0:02c293160df3 | 301 | #else |
| okini3939 | 0:02c293160df3 | 302 | // get size of drive (bytes) |
| okini3939 | 0:02c293160df3 | 303 | BlockDevGetSize(&dwDevSize); |
| okini3939 | 0:02c293160df3 | 304 | #endif |
| okini3939 | 0:02c293160df3 | 305 | // calculate highest LBA |
| okini3939 | 0:02c293160df3 | 306 | dwMaxBlock = (dwDevSize - 1) / 512; |
| okini3939 | 0:02c293160df3 | 307 | |
| okini3939 | 0:02c293160df3 | 308 | pbData[0] = (dwMaxBlock >> 24) & 0xFF; |
| okini3939 | 0:02c293160df3 | 309 | pbData[1] = (dwMaxBlock >> 16) & 0xFF; |
| okini3939 | 0:02c293160df3 | 310 | pbData[2] = (dwMaxBlock >> 8) & 0xFF; |
| okini3939 | 0:02c293160df3 | 311 | pbData[3] = (dwMaxBlock >> 0) & 0xFF; |
| okini3939 | 0:02c293160df3 | 312 | pbData[4] = (BLOCKSIZE >> 24) & 0xFF; |
| okini3939 | 0:02c293160df3 | 313 | pbData[5] = (BLOCKSIZE >> 16) & 0xFF; |
| okini3939 | 0:02c293160df3 | 314 | pbData[6] = (BLOCKSIZE >> 8) & 0xFF; |
| okini3939 | 0:02c293160df3 | 315 | pbData[7] = (BLOCKSIZE >> 0) & 0xFF; |
| okini3939 | 0:02c293160df3 | 316 | break; |
| okini3939 | 0:02c293160df3 | 317 | |
| okini3939 | 0:02c293160df3 | 318 | // read10 |
| okini3939 | 0:02c293160df3 | 319 | case SCSI_CMD_READ_10: |
| okini3939 | 0:02c293160df3 | 320 | dwLBA = (pbCDB[2] << 24) | (pbCDB[3] << 16) | (pbCDB[4] << 8) | (pbCDB[5]); |
| okini3939 | 0:02c293160df3 | 321 | |
| okini3939 | 0:02c293160df3 | 322 | // copy data from block buffer |
| okini3939 | 0:02c293160df3 | 323 | dwBufPos = (dwOffset & (BLOCKSIZE - 1)); |
| okini3939 | 0:02c293160df3 | 324 | if (dwBufPos == 0) { |
| okini3939 | 0:02c293160df3 | 325 | // read new block |
| okini3939 | 0:02c293160df3 | 326 | dwBlockNr = dwLBA + (dwOffset / BLOCKSIZE); |
| okini3939 | 0:02c293160df3 | 327 | DBG("R"); |
| okini3939 | 0:02c293160df3 | 328 | if (BlockDevRead(dwBlockNr, abBlockBuf)) { |
| okini3939 | 0:02c293160df3 | 329 | // if (sd.disk_read((char*)abBlockBuf, dwBlockNr)) { |
| okini3939 | 0:02c293160df3 | 330 | dwSense = READ_ERROR; |
| okini3939 | 0:02c293160df3 | 331 | DBG("BlockDevRead failed\n"); |
| okini3939 | 0:02c293160df3 | 332 | return NULL; |
| okini3939 | 0:02c293160df3 | 333 | } |
| okini3939 | 0:02c293160df3 | 334 | } |
| okini3939 | 0:02c293160df3 | 335 | // return pointer to data |
| okini3939 | 0:02c293160df3 | 336 | return abBlockBuf + dwBufPos; |
| okini3939 | 0:02c293160df3 | 337 | |
| okini3939 | 0:02c293160df3 | 338 | // write10 |
| okini3939 | 0:02c293160df3 | 339 | case SCSI_CMD_WRITE_10: |
| okini3939 | 0:02c293160df3 | 340 | dwLBA = (pbCDB[2] << 24) | (pbCDB[3] << 16) | (pbCDB[4] << 8) | (pbCDB[5]); |
| okini3939 | 0:02c293160df3 | 341 | |
| okini3939 | 0:02c293160df3 | 342 | // copy data to block buffer |
| okini3939 | 0:02c293160df3 | 343 | dwBufPos = ((dwOffset + 64) & (BLOCKSIZE - 1)); |
| okini3939 | 0:02c293160df3 | 344 | if (dwBufPos == 0) { |
| okini3939 | 0:02c293160df3 | 345 | // write new block |
| okini3939 | 0:02c293160df3 | 346 | dwBlockNr = dwLBA + (dwOffset / BLOCKSIZE); |
| okini3939 | 0:02c293160df3 | 347 | DBG("W"); |
| okini3939 | 0:02c293160df3 | 348 | if (BlockDevWrite(dwBlockNr, abBlockBuf)) { |
| okini3939 | 0:02c293160df3 | 349 | // if (sd.disk_write((char*)abBlockBuf, dwBlockNr)) { |
| okini3939 | 0:02c293160df3 | 350 | dwSense = WRITE_ERROR; |
| okini3939 | 0:02c293160df3 | 351 | DBG("BlockDevWrite failed\n"); |
| okini3939 | 0:02c293160df3 | 352 | return NULL; |
| okini3939 | 0:02c293160df3 | 353 | } |
| okini3939 | 0:02c293160df3 | 354 | } |
| okini3939 | 0:02c293160df3 | 355 | // return pointer to next data |
| okini3939 | 0:02c293160df3 | 356 | return abBlockBuf + dwBufPos; |
| okini3939 | 0:02c293160df3 | 357 | |
| okini3939 | 0:02c293160df3 | 358 | case SCSI_CMD_VERIFY_10: |
| okini3939 | 0:02c293160df3 | 359 | // dummy implementation |
| okini3939 | 0:02c293160df3 | 360 | break; |
| okini3939 | 0:02c293160df3 | 361 | |
| okini3939 | 0:02c293160df3 | 362 | default: |
| okini3939 | 0:02c293160df3 | 363 | // unsupported command |
| okini3939 | 0:02c293160df3 | 364 | dwSense = INVALID_CMD_OPCODE; |
| okini3939 | 0:02c293160df3 | 365 | return NULL; |
| okini3939 | 0:02c293160df3 | 366 | } |
| okini3939 | 0:02c293160df3 | 367 | |
| okini3939 | 0:02c293160df3 | 368 | // default: return pointer to start of block buffer |
| okini3939 | 0:02c293160df3 | 369 | return abBlockBuf; |
| okini3939 | 0:02c293160df3 | 370 | } |