tmk_core/tool/mbed/mbed-sdk/libraries/USBHost/USBHostMSD/USBHostMSD.cpp

   1 /* mbed USBHost Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   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
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16
  17 #include "USBHostMSD.h"
  18
  19 #if USBHOST_MSD
  20
  21 #include "dbg.h"
  22
  23 #define CBW_SIGNATURE   0x43425355
  24 #define CSW_SIGNATURE   0x53425355
  25
  26 #define DEVICE_TO_HOST  0x80
  27 #define HOST_TO_DEVICE  0x00
  28
  29 #define GET_MAX_LUN             (0xFE)
  30 #define BO_MASS_STORAGE_RESET   (0xFF)
  31
  32 USBHostMSD::USBHostMSD(const char * rootdir) : FATFileSystem(rootdir)
  33 {
  34     host = USBHost::getHostInst();
  35     init();
  36 }
  37
  38 void USBHostMSD::init() {
  39     dev_connected = false;
  40     dev = NULL;
  41     bulk_in = NULL;
  42     bulk_out = NULL;
  43     dev_connected = false;
  44     blockSize = 0;
  45     blockCount = 0;
  46     msd_intf = -1;
  47     msd_device_found = false;
  48     disk_init = false;
  49     dev_connected = false;
  50     nb_ep = 0;
  51 }
  52
  53
  54 bool USBHostMSD::connected()
  55 {
  56     return dev_connected;
  57 }
  58
  59 bool USBHostMSD::connect()
  60 {
  61
  62     if (dev_connected) {
  63         return true;
  64     }
  65
  66     for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
  67         if ((dev = host->getDevice(i)) != NULL) {
  68
  69             USB_DBG("Trying to connect MSD device\r\n");
  70
  71             if(host->enumerate(dev, this))
  72                 break;
  73
  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);
  77
  78                 if (!bulk_in || !bulk_out)
  79                     continue;
  80
  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);
  84
  85                 dev_connected = true;
  86                 return true;
  87             }
  88         } //if()
  89     } //for()
  90     init();
  91     return false;
  92 }
  93
  94 /*virtual*/ void USBHostMSD::setVidPid(uint16_t vid, uint16_t pid)
  95 {
  96     // we don't check VID/PID for MSD driver
  97 }
  98
  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
 100 {
 101     if ((msd_intf == -1) &&
 102         (intf_class == MSD_CLASS) &&
 103         (intf_subclass == 0x06) &&
 104         (intf_protocol == 0x50)) {
 105         msd_intf = intf_nb;
 106         return true;
 107     }
 108     return false;
 109 }
 110
 111 /*virtual*/ bool USBHostMSD::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
 112 {
 113     if (intf_nb == msd_intf) {
 114         if (type == BULK_ENDPOINT) {
 115             nb_ep++;
 116             if (nb_ep == 2)
 117                 msd_device_found = true;
 118             return true;
 119         }
 120     }
 121     return false;
 122 }
 123
 124
 125 int USBHostMSD::testUnitReady() {
 126     USB_DBG("Test unit ready");
 127     return SCSITransfer(NULL, 6, DEVICE_TO_HOST, 0, 0);
 128 }
 129
 130
 131 int USBHostMSD::readCapacity() {
 132     USB_DBG("Read capacity");
 133     uint8_t cmd[10] = {0x25,0,0,0,0,0,0,0,0,0};
 134     uint8_t result[8];
 135     int status = SCSITransfer(cmd, 10, DEVICE_TO_HOST, result, 8);
 136     if (status == 0) {
 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);
 140     }
 141     return status;
 142 }
 143
 144
 145 int USBHostMSD::SCSIRequestSense() {
 146     USB_DBG("Request sense");
 147     uint8_t cmd[6] = {0x03,0,0,0,18,0};
 148     uint8_t result[18];
 149     int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 18);
 150     return status;
 151 }
 152
 153
 154 int USBHostMSD::inquiry(uint8_t lun, uint8_t page_code) {
 155     USB_DBG("Inquiry");
 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};
 158     uint8_t result[36];
 159     int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 36);
 160     if (status == 0) {
 161         char vid_pid[17];
 162         memcpy(vid_pid, &result[8], 8);
 163         vid_pid[8] = 0;
 164         USB_INFO("MSD [dev: %p] - Vendor ID: %s", dev, vid_pid);
 165
 166         memcpy(vid_pid, &result[16], 16);
 167         vid_pid[16] = 0;
 168         USB_INFO("MSD [dev: %p] - Product ID: %s", dev, vid_pid);
 169
 170         memcpy(vid_pid, &result[32], 4);
 171         vid_pid[4] = 0;
 172         USB_INFO("MSD [dev: %p] - Product rev: %s", dev, vid_pid);
 173     }
 174     return status;
 175 }
 176
 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,
 182                                     CLEAR_FEATURE,
 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);
 187         }
 188     }
 189
 190     if (res != USB_TYPE_OK)
 191         return -1;
 192
 193     return 0;
 194 }
 195
 196
 197 int USBHostMSD::SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len) {
 198
 199     int res = 0;
 200
 201     cbw.Signature = CBW_SIGNATURE;
 202     cbw.Tag = 0;
 203     cbw.DataLength = transfer_len;
 204     cbw.Flags = flags;
 205     cbw.LUN = 0;
 206     cbw.CBLength = cmd_len;
 207     memset(cbw.CB,0,sizeof(cbw.CB));
 208     if (cmd) {
 209         memcpy(cbw.CB,cmd,cmd_len);
 210     }
 211
 212     // send the cbw
 213     USB_DBG("Send CBW");
 214     res = host->bulkWrite(dev, bulk_out,(uint8_t *)&cbw, 31);
 215     if (checkResult(res, bulk_out))
 216         return -1;
 217
 218     // data stage if needed
 219     if (data) {
 220         USB_DBG("data stage");
 221         if (flags == HOST_TO_DEVICE) {
 222
 223             res = host->bulkWrite(dev, bulk_out, data, transfer_len);
 224             if (checkResult(res, bulk_out))
 225                 return -1;
 226
 227         } else if (flags == DEVICE_TO_HOST) {
 228
 229             res = host->bulkRead(dev, bulk_in, data, transfer_len);
 230             if (checkResult(res, bulk_in))
 231                 return -1;
 232         }
 233     }
 234
 235     // status stage
 236     csw.Signature = 0;
 237     USB_DBG("Read CSW");
 238     res = host->bulkRead(dev, bulk_in,(uint8_t *)&csw, 13);
 239     if (checkResult(res, bulk_in))
 240         return -1;
 241
 242     if (csw.Signature != CSW_SIGNATURE) {
 243         return -1;
 244     }
 245
 246     USB_DBG("recv csw: status: %d", csw.Status);
 247
 248     // ModeSense?
 249     if ((csw.Status == 1) && (cmd[0] != 0x03)) {
 250         USB_DBG("request mode sense");
 251         return SCSIRequestSense();
 252     }
 253
 254     // perform reset recovery
 255     if ((csw.Status == 2) && (cmd[0] != 0x03)) {
 256
 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);
 262
 263         // unstall both endpoints
 264         res = host->controlWrite(   dev,
 265                                     USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
 266                                     CLEAR_FEATURE,
 267                                     0, bulk_in->getAddress(), NULL, 0);
 268
 269         res = host->controlWrite(   dev,
 270                                     USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
 271                                     CLEAR_FEATURE,
 272                                     0, bulk_out->getAddress(), NULL, 0);
 273
 274     }
 275
 276     return csw.Status;
 277 }
 278
 279
 280 int USBHostMSD::dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction) {
 281     uint8_t cmd[10];
 282     memset(cmd,0,10);
 283     cmd[0] = (direction == DEVICE_TO_HOST) ? 0x28 : 0x2A;
 284
 285     cmd[2] = (block >> 24) & 0xff;
 286     cmd[3] = (block >> 16) & 0xff;
 287     cmd[4] = (block >> 8) & 0xff;
 288     cmd[5] =  block & 0xff;
 289
 290     cmd[7] = (nbBlock >> 8) & 0xff;
 291     cmd[8] = nbBlock & 0xff;
 292
 293     return SCSITransfer(cmd, 10, direction, buf, blockSize*nbBlock);
 294 }
 295
 296 int USBHostMSD::getMaxLun() {
 297     uint8_t buf[1], res;
 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]);
 301     return res;
 302 }
 303
 304 int USBHostMSD::disk_initialize() {
 305     USB_DBG("FILESYSTEM: init");
 306     uint16_t i, timeout = 10;
 307
 308     getMaxLun();
 309
 310     for (i = 0; i < timeout; i++) {
 311         Thread::wait(100);
 312         if (!testUnitReady())
 313             break;
 314     }
 315
 316     if (i == timeout) {
 317         disk_init = false;
 318         return -1;
 319     }
 320
 321     inquiry(0, 0);
 322     disk_init = 1;
 323     return readCapacity();
 324 }
 325
 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);
 328     if (!disk_init) {
 329         disk_initialize();
 330     }
 331     if (!disk_init)
 332         return -1;
 333     for (uint64_t b = block_number; b < block_number + count; b++) {
 334         if (dataTransfer((uint8_t*)buffer, b, 1, HOST_TO_DEVICE))
 335             return -1;
 336         buffer += 512;
 337     }
 338     return 0;
 339 }
 340
 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);
 343     if (!disk_init) {
 344         disk_initialize();
 345     }
 346     if (!disk_init)
 347         return -1;
 348     for (uint64_t b = block_number; b < block_number + count; b++) {
 349         if (dataTransfer((uint8_t*)buffer, b, 1, DEVICE_TO_HOST))
 350             return -1;
 351         buffer += 512;
 352     }
 353     return 0;
 354 }
 355
 356 uint64_t USBHostMSD::disk_sectors() {
 357     USB_DBG("FILESYSTEM: sectors");
 358     if (!disk_init) {
 359         disk_initialize();
 360     }
 361     if (!disk_init)
 362         return 0;
 363     return blockCount;
 364 }
 365
 366 #endif