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");