1 /* mbed USBHost Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include "USBHostMSD.h"
23 #define CBW_SIGNATURE 0x43425355
24 #define CSW_SIGNATURE 0x53425355
26 #define DEVICE_TO_HOST 0x80
27 #define HOST_TO_DEVICE 0x00
29 #define GET_MAX_LUN (0xFE)
30 #define BO_MASS_STORAGE_RESET (0xFF)
32 USBHostMSD::USBHostMSD(const char * rootdir
) : FATFileSystem(rootdir
)
34 host
= USBHost::getHostInst();
38 void USBHostMSD::init() {
39 dev_connected
= false;
43 dev_connected
= false;
47 msd_device_found
= false;
49 dev_connected
= false;
54 bool USBHostMSD::connected()
59 bool USBHostMSD::connect()
66 for (uint8_t i
= 0; i
< MAX_DEVICE_CONNECTED
; i
++) {
67 if ((dev
= host
->getDevice(i
)) != NULL
) {
69 USB_DBG("Trying to connect MSD device\r\n");
71 if(host
->enumerate(dev
, this))
74 if (msd_device_found
) {
75 bulk_in
= dev
->getEndpoint(msd_intf
, BULK_ENDPOINT
, IN
);
76 bulk_out
= dev
->getEndpoint(msd_intf
, BULK_ENDPOINT
, OUT
);
78 if (!bulk_in
|| !bulk_out
)
81 USB_INFO("New MSD device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev
->getVid(), dev
->getPid(), dev
, msd_intf
);
82 dev
->setName("MSD", msd_intf
);
83 host
->registerDriver(dev
, msd_intf
, this, &USBHostMSD::init
);
94 /*virtual*/ void USBHostMSD::setVidPid(uint16_t vid
, uint16_t pid
)
96 // we don't check VID/PID for MSD driver
99 /*virtual*/ bool USBHostMSD::parseInterface(uint8_t intf_nb
, uint8_t intf_class
, uint8_t intf_subclass
, uint8_t intf_protocol
) //Must return true if the interface should be parsed
101 if ((msd_intf
== -1) &&
102 (intf_class
== MSD_CLASS
) &&
103 (intf_subclass
== 0x06) &&
104 (intf_protocol
== 0x50)) {
111 /*virtual*/ bool USBHostMSD::useEndpoint(uint8_t intf_nb
, ENDPOINT_TYPE type
, ENDPOINT_DIRECTION dir
) //Must return true if the endpoint will be used
113 if (intf_nb
== msd_intf
) {
114 if (type
== BULK_ENDPOINT
) {
117 msd_device_found
= true;
125 int USBHostMSD::testUnitReady() {
126 USB_DBG("Test unit ready");
127 return SCSITransfer(NULL
, 6, DEVICE_TO_HOST
, 0, 0);
131 int USBHostMSD::readCapacity() {
132 USB_DBG("Read capacity");
133 uint8_t cmd
[10] = {0x25,0,0,0,0,0,0,0,0,0};
135 int status
= SCSITransfer(cmd
, 10, DEVICE_TO_HOST
, result
, 8);
137 blockCount
= (result
[0] << 24) | (result
[1] << 16) | (result
[2] << 8) | result
[3];
138 blockSize
= (result
[4] << 24) | (result
[5] << 16) | (result
[6] << 8) | result
[7];
139 USB_INFO("MSD [dev: %p] - blockCount: %lld, blockSize: %d, Capacity: %lld\r\n", dev
, blockCount
, blockSize
, blockCount
*blockSize
);
145 int USBHostMSD::SCSIRequestSense() {
146 USB_DBG("Request sense");
147 uint8_t cmd
[6] = {0x03,0,0,0,18,0};
149 int status
= SCSITransfer(cmd
, 6, DEVICE_TO_HOST
, result
, 18);
154 int USBHostMSD::inquiry(uint8_t lun
, uint8_t page_code
) {
156 uint8_t evpd
= (page_code
== 0) ? 0 : 1;
157 uint8_t cmd
[6] = {0x12, uint8_t((lun
<< 5) | evpd
), page_code
, 0, 36, 0};
159 int status
= SCSITransfer(cmd
, 6, DEVICE_TO_HOST
, result
, 36);
162 memcpy(vid_pid
, &result
[8], 8);
164 USB_INFO("MSD [dev: %p] - Vendor ID: %s", dev
, vid_pid
);
166 memcpy(vid_pid
, &result
[16], 16);
168 USB_INFO("MSD [dev: %p] - Product ID: %s", dev
, vid_pid
);
170 memcpy(vid_pid
, &result
[32], 4);
172 USB_INFO("MSD [dev: %p] - Product rev: %s", dev
, vid_pid
);
177 int USBHostMSD::checkResult(uint8_t res
, USBEndpoint
* ep
) {
178 // if ep stalled: send clear feature
179 if (res
== USB_TYPE_STALL_ERROR
) {
180 res
= host
->controlWrite( dev
,
181 USB_RECIPIENT_ENDPOINT
| USB_HOST_TO_DEVICE
| USB_REQUEST_TYPE_STANDARD
,
183 0, ep
->getAddress(), NULL
, 0);
184 // set state to IDLE if clear feature successful
185 if (res
== USB_TYPE_OK
) {
186 ep
->setState(USB_TYPE_IDLE
);
190 if (res
!= USB_TYPE_OK
)
197 int USBHostMSD::SCSITransfer(uint8_t * cmd
, uint8_t cmd_len
, int flags
, uint8_t * data
, uint32_t transfer_len
) {
201 cbw
.Signature
= CBW_SIGNATURE
;
203 cbw
.DataLength
= transfer_len
;
206 cbw
.CBLength
= cmd_len
;
207 memset(cbw
.CB
,0,sizeof(cbw
.CB
));
209 memcpy(cbw
.CB
,cmd
,cmd_len
);
214 res
= host
->bulkWrite(dev
, bulk_out
,(uint8_t *)&cbw
, 31);
215 if (checkResult(res
, bulk_out
))
218 // data stage if needed
220 USB_DBG("data stage");
221 if (flags
== HOST_TO_DEVICE
) {
223 res
= host
->bulkWrite(dev
, bulk_out
, data
, transfer_len
);
224 if (checkResult(res
, bulk_out
))
227 } else if (flags
== DEVICE_TO_HOST
) {
229 res
= host
->bulkRead(dev
, bulk_in
, data
, transfer_len
);
230 if (checkResult(res
, bulk_in
))
238 res
= host
->bulkRead(dev
, bulk_in
,(uint8_t *)&csw
, 13);
239 if (checkResult(res
, bulk_in
))
242 if (csw
.Signature
!= CSW_SIGNATURE
) {
246 USB_DBG("recv csw: status: %d", csw
.Status
);
249 if ((csw
.Status
== 1) && (cmd
[0] != 0x03)) {
250 USB_DBG("request mode sense");
251 return SCSIRequestSense();
254 // perform reset recovery
255 if ((csw
.Status
== 2) && (cmd
[0] != 0x03)) {
257 // send Bulk-Only Mass Storage Reset request
258 res
= host
->controlWrite( dev
,
259 USB_RECIPIENT_INTERFACE
| USB_HOST_TO_DEVICE
| USB_REQUEST_TYPE_CLASS
,
260 BO_MASS_STORAGE_RESET
,
261 0, msd_intf
, NULL
, 0);
263 // unstall both endpoints
264 res
= host
->controlWrite( dev
,
265 USB_RECIPIENT_ENDPOINT
| USB_HOST_TO_DEVICE
| USB_REQUEST_TYPE_STANDARD
,
267 0, bulk_in
->getAddress(), NULL
, 0);
269 res
= host
->controlWrite( dev
,
270 USB_RECIPIENT_ENDPOINT
| USB_HOST_TO_DEVICE
| USB_REQUEST_TYPE_STANDARD
,
272 0, bulk_out
->getAddress(), NULL
, 0);
280 int USBHostMSD::dataTransfer(uint8_t * buf
, uint32_t block
, uint8_t nbBlock
, int direction
) {
283 cmd
[0] = (direction
== DEVICE_TO_HOST
) ? 0x28 : 0x2A;
285 cmd
[2] = (block
>> 24) & 0xff;
286 cmd
[3] = (block
>> 16) & 0xff;
287 cmd
[4] = (block
>> 8) & 0xff;
288 cmd
[5] = block
& 0xff;
290 cmd
[7] = (nbBlock
>> 8) & 0xff;
291 cmd
[8] = nbBlock
& 0xff;
293 return SCSITransfer(cmd
, 10, direction
, buf
, blockSize
*nbBlock
);
296 int USBHostMSD::getMaxLun() {
298 res
= host
->controlRead( dev
, USB_RECIPIENT_INTERFACE
| USB_DEVICE_TO_HOST
| USB_REQUEST_TYPE_CLASS
,
299 0xfe, 0, msd_intf
, buf
, 1);
300 USB_DBG("max lun: %d", buf
[0]);
304 int USBHostMSD::disk_initialize() {
305 USB_DBG("FILESYSTEM: init");
306 uint16_t i
, timeout
= 10;
310 for (i
= 0; i
< timeout
; i
++) {
312 if (!testUnitReady())
323 return readCapacity();
326 int USBHostMSD::disk_write(const uint8_t* buffer
, uint64_t block_number
, uint8_t count
) {
327 USB_DBG("FILESYSTEM: write block: %lld, count: %d", block_number
, count
);
333 for (uint64_t b
= block_number
; b
< block_number
+ count
; b
++) {
334 if (dataTransfer((uint8_t*)buffer
, b
, 1, HOST_TO_DEVICE
))
341 int USBHostMSD::disk_read(uint8_t* buffer
, uint64_t block_number
, uint8_t count
) {
342 USB_DBG("FILESYSTEM: read block: %lld, count: %d", block_number
, count
);
348 for (uint64_t b
= block_number
; b
< block_number
+ count
; b
++) {
349 if (dataTransfer((uint8_t*)buffer
, b
, 1, DEVICE_TO_HOST
))
356 uint64_t USBHostMSD::disk_sectors() {
357 USB_DBG("FILESYSTEM: sectors");