Yoshiro Iwasaki Iwasaki / USBHost

USBHost library

Dependencies:   FATFileSystem mbed-rtos

Fork of USBHost by mbed official

USBHostMSD/USBHostMSD.cpp@32:eec87ad80bc8, 2015-08-02 (annotated)

Committer:
minmax
Date:
Sun Aug 02 07:27:36 2015 +0000
Revision:
32:eec87ad80bc8
Parent:
27:4206883f4cb7 
original

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 8:93da8ea2708b 1 /* mbed USBHost Library
samux 8:93da8ea2708b 2 * Copyright (c) 2006-2013 ARM Limited
samux 8:93da8ea2708b 3 *
samux 8:93da8ea2708b 4 * Licensed under the Apache License, Version 2.0 (the "License");
samux 8:93da8ea2708b 5 * you may not use this file except in compliance with the License.
samux 8:93da8ea2708b 6 * You may obtain a copy of the License at
samux 8:93da8ea2708b 7 *
samux 8:93da8ea2708b 8 * http://www.apache.org/licenses/LICENSE-2.0
samux 8:93da8ea2708b 9 *
samux 8:93da8ea2708b 10 * Unless required by applicable law or agreed to in writing, software
samux 8:93da8ea2708b 11 * distributed under the License is distributed on an "AS IS" BASIS,
samux 8:93da8ea2708b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
samux 8:93da8ea2708b 13 * See the License for the specific language governing permissions and
samux 8:93da8ea2708b 14 * limitations under the License.
samux 8:93da8ea2708b 15 */
mbed_official 0:a554658735bf 16
mbed_official 0:a554658735bf 17 #include "USBHostMSD.h"
mbed_official 0:a554658735bf 18
mbed_official 0:a554658735bf 19 #if USBHOST_MSD
mbed_official 0:a554658735bf 20
mbed_official 0:a554658735bf 21 #include "dbg.h"
mbed_official 0:a554658735bf 22
mbed_official 0:a554658735bf 23 #define CBW_SIGNATURE 0x43425355
mbed_official 0:a554658735bf 24 #define CSW_SIGNATURE 0x53425355
mbed_official 0:a554658735bf 25
mbed_official 0:a554658735bf 26 #define DEVICE_TO_HOST 0x80
mbed_official 0:a554658735bf 27 #define HOST_TO_DEVICE 0x00
mbed_official 0:a554658735bf 28
samux 4:b320d68e98e7 29 #define GET_MAX_LUN (0xFE)
samux 4:b320d68e98e7 30 #define BO_MASS_STORAGE_RESET (0xFF)
mbed_official 0:a554658735bf 31
mbed_official 0:a554658735bf 32 USBHostMSD::USBHostMSD(const char * rootdir) : FATFileSystem(rootdir)
mbed_official 0:a554658735bf 33 {
mbed_official 0:a554658735bf 34 host = USBHost::getHostInst();
mbed_official 0:a554658735bf 35 init();
mbed_official 0:a554658735bf 36 }
mbed_official 0:a554658735bf 37
mbed_official 0:a554658735bf 38 void USBHostMSD::init() {
mbed_official 0:a554658735bf 39 dev_connected = false;
mbed_official 0:a554658735bf 40 dev = NULL;
mbed_official 0:a554658735bf 41 bulk_in = NULL;
mbed_official 0:a554658735bf 42 bulk_out = NULL;
mbed_official 0:a554658735bf 43 dev_connected = false;
mbed_official 0:a554658735bf 44 blockSize = 0;
mbed_official 0:a554658735bf 45 blockCount = 0;
mbed_official 0:a554658735bf 46 msd_intf = -1;
mbed_official 0:a554658735bf 47 msd_device_found = false;
mbed_official 0:a554658735bf 48 disk_init = false;
mbed_official 0:a554658735bf 49 dev_connected = false;
samux 4:b320d68e98e7 50 nb_ep = 0;
mbed_official 0:a554658735bf 51 }
mbed_official 0:a554658735bf 52
mbed_official 0:a554658735bf 53
mbed_official 0:a554658735bf 54 bool USBHostMSD::connected()
mbed_official 0:a554658735bf 55 {
mbed_official 0:a554658735bf 56 return dev_connected;
mbed_official 0:a554658735bf 57 }
mbed_official 0:a554658735bf 58
mbed_official 0:a554658735bf 59 bool USBHostMSD::connect()
mbed_official 0:a554658735bf 60 {
mbed_official 0:a554658735bf 61
mbed_official 0:a554658735bf 62 if (dev_connected) {
mbed_official 0:a554658735bf 63 return true;
mbed_official 0:a554658735bf 64 }
mbed_official 0:a554658735bf 65
samux 5:e48791a1ef18 66 for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
mbed_official 0:a554658735bf 67 if ((dev = host->getDevice(i)) != NULL) {
mbed_official 24:868cbfe611a7 68
samux 4:b320d68e98e7 69 USB_DBG("Trying to connect MSD device\r\n");
mbed_official 24:868cbfe611a7 70
mbed_official 0:a554658735bf 71 if(host->enumerate(dev, this))
mbed_official 0:a554658735bf 72 break;
mbed_official 0:a554658735bf 73
mbed_official 0:a554658735bf 74 if (msd_device_found) {
mbed_official 0:a554658735bf 75 bulk_in = dev->getEndpoint(msd_intf, BULK_ENDPOINT, IN);
mbed_official 0:a554658735bf 76 bulk_out = dev->getEndpoint(msd_intf, BULK_ENDPOINT, OUT);
mbed_official 24:868cbfe611a7 77
mbed_official 0:a554658735bf 78 if (!bulk_in || !bulk_out)
samux 4:b320d68e98e7 79 continue;
mbed_official 24:868cbfe611a7 80
samux 4:b320d68e98e7 81 USB_INFO("New MSD device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, msd_intf);
samux 4:b320d68e98e7 82 dev->setName("MSD", msd_intf);
mbed_official 0:a554658735bf 83 host->registerDriver(dev, msd_intf, this, &USBHostMSD::init);
mbed_official 0:a554658735bf 84
mbed_official 0:a554658735bf 85 dev_connected = true;
mbed_official 0:a554658735bf 86 return true;
mbed_official 0:a554658735bf 87 }
mbed_official 0:a554658735bf 88 } //if()
mbed_official 0:a554658735bf 89 } //for()
samux 4:b320d68e98e7 90 init();
mbed_official 0:a554658735bf 91 return false;
mbed_official 0:a554658735bf 92 }
mbed_official 0:a554658735bf 93
mbed_official 0:a554658735bf 94 /*virtual*/ void USBHostMSD::setVidPid(uint16_t vid, uint16_t pid)
mbed_official 0:a554658735bf 95 {
mbed_official 0:a554658735bf 96 // we don't check VID/PID for MSD driver
mbed_official 0:a554658735bf 97 }
mbed_official 0:a554658735bf 98
mbed_official 0:a554658735bf 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
mbed_official 0:a554658735bf 100 {
mbed_official 0:a554658735bf 101 if ((msd_intf == -1) &&
mbed_official 0:a554658735bf 102 (intf_class == MSD_CLASS) &&
mbed_official 0:a554658735bf 103 (intf_subclass == 0x06) &&
mbed_official 0:a554658735bf 104 (intf_protocol == 0x50)) {
mbed_official 0:a554658735bf 105 msd_intf = intf_nb;
mbed_official 0:a554658735bf 106 return true;
mbed_official 0:a554658735bf 107 }
mbed_official 0:a554658735bf 108 return false;
mbed_official 0:a554658735bf 109 }
mbed_official 0:a554658735bf 110
mbed_official 0:a554658735bf 111 /*virtual*/ bool USBHostMSD::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
mbed_official 0:a554658735bf 112 {
mbed_official 0:a554658735bf 113 if (intf_nb == msd_intf) {
mbed_official 0:a554658735bf 114 if (type == BULK_ENDPOINT) {
samux 4:b320d68e98e7 115 nb_ep++;
samux 4:b320d68e98e7 116 if (nb_ep == 2)
samux 4:b320d68e98e7 117 msd_device_found = true;
mbed_official 0:a554658735bf 118 return true;
mbed_official 0:a554658735bf 119 }
mbed_official 0:a554658735bf 120 }
mbed_official 0:a554658735bf 121 return false;
mbed_official 0:a554658735bf 122 }
mbed_official 0:a554658735bf 123
mbed_official 0:a554658735bf 124
mbed_official 0:a554658735bf 125 int USBHostMSD::testUnitReady() {
samux 4:b320d68e98e7 126 USB_DBG("Test unit ready");
mbed_official 0:a554658735bf 127 return SCSITransfer(NULL, 6, DEVICE_TO_HOST, 0, 0);
mbed_official 0:a554658735bf 128 }
mbed_official 0:a554658735bf 129
samux 4:b320d68e98e7 130
mbed_official 0:a554658735bf 131 int USBHostMSD::readCapacity() {
samux 4:b320d68e98e7 132 USB_DBG("Read capacity");
mbed_official 0:a554658735bf 133 uint8_t cmd[10] = {0x25,0,0,0,0,0,0,0,0,0};
mbed_official 0:a554658735bf 134 uint8_t result[8];
mbed_official 0:a554658735bf 135 int status = SCSITransfer(cmd, 10, DEVICE_TO_HOST, result, 8);
mbed_official 0:a554658735bf 136 if (status == 0) {
mbed_official 0:a554658735bf 137 blockCount = (result[0] << 24) | (result[1] << 16) | (result[2] << 8) | result[3];
mbed_official 0:a554658735bf 138 blockSize = (result[4] << 24) | (result[5] << 16) | (result[6] << 8) | result[7];
samux 4:b320d68e98e7 139 USB_INFO("MSD [dev: %p] - blockCount: %lld, blockSize: %d, Capacity: %lld\r\n", dev, blockCount, blockSize, blockCount*blockSize);
mbed_official 0:a554658735bf 140 }
mbed_official 0:a554658735bf 141 return status;
mbed_official 0:a554658735bf 142 }
mbed_official 0:a554658735bf 143
mbed_official 0:a554658735bf 144
mbed_official 0:a554658735bf 145 int USBHostMSD::SCSIRequestSense() {
samux 4:b320d68e98e7 146 USB_DBG("Request sense");
samux 4:b320d68e98e7 147 uint8_t cmd[6] = {0x03,0,0,0,18,0};
samux 4:b320d68e98e7 148 uint8_t result[18];
samux 4:b320d68e98e7 149 int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 18);
mbed_official 0:a554658735bf 150 return status;
mbed_official 0:a554658735bf 151 }
mbed_official 0:a554658735bf 152
mbed_official 0:a554658735bf 153
mbed_official 0:a554658735bf 154 int USBHostMSD::inquiry(uint8_t lun, uint8_t page_code) {
samux 4:b320d68e98e7 155 USB_DBG("Inquiry");
mbed_official 0:a554658735bf 156 uint8_t evpd = (page_code == 0) ? 0 : 1;
mbed_official 13:b58a2204422f 157 uint8_t cmd[6] = {0x12, uint8_t((lun << 5) | evpd), page_code, 0, 36, 0};
mbed_official 0:a554658735bf 158 uint8_t result[36];
mbed_official 0:a554658735bf 159 int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 36);
mbed_official 0:a554658735bf 160 if (status == 0) {
samux 4:b320d68e98e7 161 char vid_pid[17];
mbed_official 0:a554658735bf 162 memcpy(vid_pid, &result[8], 8);
mbed_official 0:a554658735bf 163 vid_pid[8] = 0;
mbed_official 0:a554658735bf 164 USB_INFO("MSD [dev: %p] - Vendor ID: %s", dev, vid_pid);
mbed_official 0:a554658735bf 165
samux 4:b320d68e98e7 166 memcpy(vid_pid, &result[16], 16);
samux 4:b320d68e98e7 167 vid_pid[16] = 0;
samux 4:b320d68e98e7 168 USB_INFO("MSD [dev: %p] - Product ID: %s", dev, vid_pid);
mbed_official 0:a554658735bf 169
mbed_official 0:a554658735bf 170 memcpy(vid_pid, &result[32], 4);
mbed_official 0:a554658735bf 171 vid_pid[4] = 0;
mbed_official 0:a554658735bf 172 USB_INFO("MSD [dev: %p] - Product rev: %s", dev, vid_pid);
mbed_official 0:a554658735bf 173 }
mbed_official 0:a554658735bf 174 return status;
mbed_official 0:a554658735bf 175 }
mbed_official 0:a554658735bf 176
mbed_official 0:a554658735bf 177 int USBHostMSD::checkResult(uint8_t res, USBEndpoint * ep) {
mbed_official 0:a554658735bf 178 // if ep stalled: send clear feature
mbed_official 0:a554658735bf 179 if (res == USB_TYPE_STALL_ERROR) {
mbed_official 0:a554658735bf 180 res = host->controlWrite( dev,
mbed_official 0:a554658735bf 181 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
mbed_official 0:a554658735bf 182 CLEAR_FEATURE,
samux 4:b320d68e98e7 183 0, ep->getAddress(), NULL, 0);
mbed_official 0:a554658735bf 184 // set state to IDLE if clear feature successful
mbed_official 0:a554658735bf 185 if (res == USB_TYPE_OK) {
mbed_official 0:a554658735bf 186 ep->setState(USB_TYPE_IDLE);
mbed_official 0:a554658735bf 187 }
mbed_official 0:a554658735bf 188 }
mbed_official 0:a554658735bf 189
mbed_official 0:a554658735bf 190 if (res != USB_TYPE_OK)
mbed_official 0:a554658735bf 191 return -1;
mbed_official 0:a554658735bf 192
mbed_official 0:a554658735bf 193 return 0;
mbed_official 0:a554658735bf 194 }
mbed_official 0:a554658735bf 195
mbed_official 0:a554658735bf 196
mbed_official 0:a554658735bf 197 int USBHostMSD::SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len) {
mbed_official 0:a554658735bf 198
mbed_official 0:a554658735bf 199 int res = 0;
mbed_official 0:a554658735bf 200
mbed_official 0:a554658735bf 201 cbw.Signature = CBW_SIGNATURE;
mbed_official 0:a554658735bf 202 cbw.Tag = 0;
mbed_official 0:a554658735bf 203 cbw.DataLength = transfer_len;
mbed_official 0:a554658735bf 204 cbw.Flags = flags;
mbed_official 0:a554658735bf 205 cbw.LUN = 0;
mbed_official 0:a554658735bf 206 cbw.CBLength = cmd_len;
mbed_official 0:a554658735bf 207 memset(cbw.CB,0,sizeof(cbw.CB));
mbed_official 0:a554658735bf 208 if (cmd) {
mbed_official 0:a554658735bf 209 memcpy(cbw.CB,cmd,cmd_len);
mbed_official 0:a554658735bf 210 }
mbed_official 0:a554658735bf 211
mbed_official 0:a554658735bf 212 // send the cbw
samux 4:b320d68e98e7 213 USB_DBG("Send CBW");
mbed_official 0:a554658735bf 214 res = host->bulkWrite(dev, bulk_out,(uint8_t *)&cbw, 31);
mbed_official 0:a554658735bf 215 if (checkResult(res, bulk_out))
mbed_official 0:a554658735bf 216 return -1;
mbed_official 0:a554658735bf 217
mbed_official 0:a554658735bf 218 // data stage if needed
mbed_official 0:a554658735bf 219 if (data) {
samux 4:b320d68e98e7 220 USB_DBG("data stage");
mbed_official 0:a554658735bf 221 if (flags == HOST_TO_DEVICE) {
mbed_official 24:868cbfe611a7 222
mbed_official 0:a554658735bf 223 res = host->bulkWrite(dev, bulk_out, data, transfer_len);
mbed_official 0:a554658735bf 224 if (checkResult(res, bulk_out))
mbed_official 0:a554658735bf 225 return -1;
mbed_official 0:a554658735bf 226
mbed_official 0:a554658735bf 227 } else if (flags == DEVICE_TO_HOST) {
mbed_official 0:a554658735bf 228
mbed_official 0:a554658735bf 229 res = host->bulkRead(dev, bulk_in, data, transfer_len);
mbed_official 0:a554658735bf 230 if (checkResult(res, bulk_in))
mbed_official 0:a554658735bf 231 return -1;
mbed_official 0:a554658735bf 232 }
mbed_official 0:a554658735bf 233 }
mbed_official 0:a554658735bf 234
mbed_official 0:a554658735bf 235 // status stage
mbed_official 0:a554658735bf 236 csw.Signature = 0;
samux 4:b320d68e98e7 237 USB_DBG("Read CSW");
mbed_official 0:a554658735bf 238 res = host->bulkRead(dev, bulk_in,(uint8_t *)&csw, 13);
mbed_official 0:a554658735bf 239 if (checkResult(res, bulk_in))
mbed_official 0:a554658735bf 240 return -1;
mbed_official 0:a554658735bf 241
mbed_official 0:a554658735bf 242 if (csw.Signature != CSW_SIGNATURE) {
mbed_official 0:a554658735bf 243 return -1;
mbed_official 0:a554658735bf 244 }
mbed_official 24:868cbfe611a7 245
samux 4:b320d68e98e7 246 USB_DBG("recv csw: status: %d", csw.Status);
mbed_official 0:a554658735bf 247
mbed_official 0:a554658735bf 248 // ModeSense?
samux 4:b320d68e98e7 249 if ((csw.Status == 1) && (cmd[0] != 0x03)) {
samux 4:b320d68e98e7 250 USB_DBG("request mode sense");
mbed_official 0:a554658735bf 251 return SCSIRequestSense();
samux 4:b320d68e98e7 252 }
mbed_official 24:868cbfe611a7 253
samux 4:b320d68e98e7 254 // perform reset recovery
samux 4:b320d68e98e7 255 if ((csw.Status == 2) && (cmd[0] != 0x03)) {
mbed_official 24:868cbfe611a7 256
samux 4:b320d68e98e7 257 // send Bulk-Only Mass Storage Reset request
samux 4:b320d68e98e7 258 res = host->controlWrite( dev,
samux 4:b320d68e98e7 259 USB_RECIPIENT_INTERFACE | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_CLASS,
samux 4:b320d68e98e7 260 BO_MASS_STORAGE_RESET,
samux 4:b320d68e98e7 261 0, msd_intf, NULL, 0);
mbed_official 24:868cbfe611a7 262
samux 4:b320d68e98e7 263 // unstall both endpoints
samux 4:b320d68e98e7 264 res = host->controlWrite( dev,
samux 4:b320d68e98e7 265 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
samux 4:b320d68e98e7 266 CLEAR_FEATURE,
samux 4:b320d68e98e7 267 0, bulk_in->getAddress(), NULL, 0);
mbed_official 24:868cbfe611a7 268
samux 4:b320d68e98e7 269 res = host->controlWrite( dev,
samux 4:b320d68e98e7 270 USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
samux 4:b320d68e98e7 271 CLEAR_FEATURE,
samux 4:b320d68e98e7 272 0, bulk_out->getAddress(), NULL, 0);
mbed_official 24:868cbfe611a7 273
samux 4:b320d68e98e7 274 }
mbed_official 0:a554658735bf 275
mbed_official 0:a554658735bf 276 return csw.Status;
mbed_official 0:a554658735bf 277 }
mbed_official 0:a554658735bf 278
mbed_official 0:a554658735bf 279
mbed_official 0:a554658735bf 280 int USBHostMSD::dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction) {
mbed_official 0:a554658735bf 281 uint8_t cmd[10];
mbed_official 0:a554658735bf 282 memset(cmd,0,10);
mbed_official 0:a554658735bf 283 cmd[0] = (direction == DEVICE_TO_HOST) ? 0x28 : 0x2A;
mbed_official 0:a554658735bf 284
mbed_official 0:a554658735bf 285 cmd[2] = (block >> 24) & 0xff;
mbed_official 0:a554658735bf 286 cmd[3] = (block >> 16) & 0xff;
mbed_official 0:a554658735bf 287 cmd[4] = (block >> 8) & 0xff;
mbed_official 0:a554658735bf 288 cmd[5] = block & 0xff;
mbed_official 0:a554658735bf 289
mbed_official 0:a554658735bf 290 cmd[7] = (nbBlock >> 8) & 0xff;
mbed_official 0:a554658735bf 291 cmd[8] = nbBlock & 0xff;
mbed_official 0:a554658735bf 292
mbed_official 0:a554658735bf 293 return SCSITransfer(cmd, 10, direction, buf, blockSize*nbBlock);
mbed_official 0:a554658735bf 294 }
mbed_official 0:a554658735bf 295
samux 4:b320d68e98e7 296 int USBHostMSD::getMaxLun() {
samux 4:b320d68e98e7 297 uint8_t buf[1], res;
samux 4:b320d68e98e7 298 res = host->controlRead( dev, USB_RECIPIENT_INTERFACE | USB_DEVICE_TO_HOST | USB_REQUEST_TYPE_CLASS,
samux 4:b320d68e98e7 299 0xfe, 0, msd_intf, buf, 1);
samux 4:b320d68e98e7 300 USB_DBG("max lun: %d", buf[0]);
samux 4:b320d68e98e7 301 return res;
samux 4:b320d68e98e7 302 }
mbed_official 0:a554658735bf 303
mbed_official 0:a554658735bf 304 int USBHostMSD::disk_initialize() {
mbed_official 0:a554658735bf 305 USB_DBG("FILESYSTEM: init");
mbed_official 27:4206883f4cb7 306 uint16_t i, timeout = 10;
mbed_official 24:868cbfe611a7 307
samux 4:b320d68e98e7 308 getMaxLun();
mbed_official 24:868cbfe611a7 309
mbed_official 0:a554658735bf 310 for (i = 0; i < timeout; i++) {
samux 4:b320d68e98e7 311 Thread::wait(100);
mbed_official 0:a554658735bf 312 if (!testUnitReady())
mbed_official 0:a554658735bf 313 break;
mbed_official 0:a554658735bf 314 }
mbed_official 24:868cbfe611a7 315
mbed_official 0:a554658735bf 316 if (i == timeout) {
mbed_official 0:a554658735bf 317 disk_init = false;
mbed_official 0:a554658735bf 318 return -1;
mbed_official 0:a554658735bf 319 }
mbed_official 24:868cbfe611a7 320
mbed_official 0:a554658735bf 321 inquiry(0, 0);
mbed_official 0:a554658735bf 322 disk_init = 1;
mbed_official 0:a554658735bf 323 return readCapacity();
mbed_official 0:a554658735bf 324 }
mbed_official 0:a554658735bf 325
mbed_official 26:607951c26872 326 int USBHostMSD::disk_write(const uint8_t* buffer, uint64_t block_number, uint8_t count) {
mbed_official 26:607951c26872 327 USB_DBG("FILESYSTEM: write block: %lld, count: %d", block_number, count);
mbed_official 0:a554658735bf 328 if (!disk_init) {
mbed_official 0:a554658735bf 329 disk_initialize();
mbed_official 0:a554658735bf 330 }
mbed_official 0:a554658735bf 331 if (!disk_init)
mbed_official 0:a554658735bf 332 return -1;
mbed_official 26:607951c26872 333 for (uint64_t b = block_number; b < block_number + count; b++) {
mbed_official 26:607951c26872 334 if (dataTransfer((uint8_t*)buffer, b, 1, HOST_TO_DEVICE))
mbed_official 26:607951c26872 335 return -1;
mbed_official 26:607951c26872 336 buffer += 512;
mbed_official 26:607951c26872 337 }
mbed_official 26:607951c26872 338 return 0;
mbed_official 0:a554658735bf 339 }
mbed_official 0:a554658735bf 340
mbed_official 26:607951c26872 341 int USBHostMSD::disk_read(uint8_t* buffer, uint64_t block_number, uint8_t count) {
mbed_official 26:607951c26872 342 USB_DBG("FILESYSTEM: read block: %lld, count: %d", block_number, count);
mbed_official 0:a554658735bf 343 if (!disk_init) {
mbed_official 0:a554658735bf 344 disk_initialize();
mbed_official 0:a554658735bf 345 }
mbed_official 0:a554658735bf 346 if (!disk_init)
mbed_official 0:a554658735bf 347 return -1;
mbed_official 26:607951c26872 348 for (uint64_t b = block_number; b < block_number + count; b++) {
mbed_official 26:607951c26872 349 if (dataTransfer((uint8_t*)buffer, b, 1, DEVICE_TO_HOST))
mbed_official 26:607951c26872 350 return -1;
mbed_official 26:607951c26872 351 buffer += 512;
mbed_official 26:607951c26872 352 }
mbed_official 26:607951c26872 353 return 0;
mbed_official 0:a554658735bf 354 }
mbed_official 0:a554658735bf 355
mbed_official 0:a554658735bf 356 uint64_t USBHostMSD::disk_sectors() {
mbed_official 0:a554658735bf 357 USB_DBG("FILESYSTEM: sectors");
mbed_official 0:a554658735bf 358 if (!disk_init) {
mbed_official 0:a554658735bf 359 disk_initialize();
mbed_official 0:a554658735bf 360 }
mbed_official 0:a554658735bf 361 if (!disk_init)
mbed_official 0:a554658735bf 362 return 0;
mbed_official 0:a554658735bf 363 return blockCount;
mbed_official 0:a554658735bf 364 }
mbed_official 0:a554658735bf 365
mbed_official 0:a554658735bf 366 #endif