tmk_core/tool/mbed/mbed-sdk/libraries/USBHost/USBHostSerial/USBHostSerial.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 "USBHostSerial.h"
  18
  19 #if USBHOST_SERIAL
  20
  21 #include "dbg.h"
  22
  23 #define CHECK_INTERFACE(cls,subcls,proto) \
  24         (((cls == 0xFF)         && (subcls == 0xFF) && (proto == 0xFF)) /* QUALCOM CDC */  || \
  25          ((cls == SERIAL_CLASS) && (subcls == 0x00) && (proto == 0x00)) /* STANDARD CDC */ )
  26
  27 #if (USBHOST_SERIAL <= 1)
  28
  29 USBHostSerial::USBHostSerial()
  30 {
  31     host = USBHost::getHostInst();
  32     ports_found = 0;
  33     dev_connected = false;
  34 }
  35
  36 bool USBHostSerial::connected()
  37 {
  38     return dev_connected;
  39 }
  40
  41 void USBHostSerial::disconnect(void)
  42 {
  43     ports_found = 0;
  44     dev = NULL;
  45 }
  46
  47 bool USBHostSerial::connect() {
  48
  49     if (dev)
  50     {
  51         for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
  52         {
  53             USBDeviceConnected* d = host->getDevice(i);
  54             if (dev == d)
  55                 return true;
  56         }
  57         disconnect();
  58     }
  59     for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
  60     {
  61         USBDeviceConnected* d = host->getDevice(i);
  62         if (d != NULL) {
  63
  64             USB_DBG("Trying to connect serial device \r\n");
  65             if(host->enumerate(d, this))
  66                 break;
  67
  68             USBEndpoint* bulk_in  = d->getEndpoint(port_intf, BULK_ENDPOINT, IN);
  69             USBEndpoint* bulk_out = d->getEndpoint(port_intf, BULK_ENDPOINT, OUT);
  70             if (bulk_in && bulk_out)
  71             {
  72                 USBHostSerialPort::connect(host,d,port_intf,bulk_in, bulk_out);
  73                 dev = d;
  74                 dev_connected = true;
  75             }
  76         }
  77     }
  78     return dev != NULL;
  79 }
  80
  81 /*virtual*/ void USBHostSerial::setVidPid(uint16_t vid, uint16_t pid)
  82 {
  83     // we don't check VID/PID for MSD driver
  84 }
  85
  86 /*virtual*/ bool USBHostSerial::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
  87 {
  88     if (!ports_found &&
  89         CHECK_INTERFACE(intf_class, intf_subclass, intf_protocol)) {
  90         port_intf = intf_nb;
  91         ports_found = true;
  92         return true;
  93     }
  94     return false;
  95 }
  96
  97 /*virtual*/ bool USBHostSerial::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
  98 {
  99     if (ports_found && (intf_nb == port_intf)) {
 100         if (type == BULK_ENDPOINT)
 101             return true;
 102     }
 103     return false;
 104 }
 105
 106 #else // (USBHOST_SERIAL > 1)
 107
 108 //------------------------------------------------------------------------------
 109
 110 USBHostMultiSerial::USBHostMultiSerial()
 111 {
 112     host = USBHost::getHostInst();
 113     dev = NULL;
 114     memset(ports, NULL, sizeof(ports));
 115     ports_found = 0;
 116     dev_connected = false;
 117 }
 118
 119 USBHostMultiSerial::~USBHostMultiSerial()
 120 {
 121     disconnect();
 122 }
 123
 124 bool USBHostMultiSerial::connected()
 125 {
 126     return dev_connected;
 127 }
 128
 129 void USBHostMultiSerial::disconnect(void)
 130 {
 131     for (int port = 0; port < USBHOST_SERIAL; port ++)
 132     {
 133         if (ports[port])
 134         {
 135             delete ports[port];
 136             ports[port] = NULL;
 137         }
 138     }
 139     ports_found = 0;
 140     dev = NULL;
 141 }
 142
 143 bool USBHostMultiSerial::connect() {
 144
 145     if (dev)
 146     {
 147         for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
 148         {
 149             USBDeviceConnected* d = host->getDevice(i);
 150             if (dev == d)
 151                 return true;
 152         }
 153         disconnect();
 154     }
 155     for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++)
 156     {
 157         USBDeviceConnected* d = host->getDevice(i);
 158         if (d != NULL) {
 159
 160             USB_DBG("Trying to connect serial device \r\n");
 161             if(host->enumerate(d, this))
 162                 break;
 163
 164             for (int port = 0; port < ports_found; port ++)
 165             {
 166                 USBEndpoint* bulk_in  = d->getEndpoint(port_intf[port], BULK_ENDPOINT, IN);
 167                 USBEndpoint* bulk_out = d->getEndpoint(port_intf[port], BULK_ENDPOINT, OUT);
 168                 if (bulk_in && bulk_out)
 169                 {
 170                     ports[port] = new USBHostSerialPort();
 171                     if (ports[port])
 172                     {
 173                         ports[port]->connect(host,d,port_intf[port],bulk_in, bulk_out);
 174                         dev = d;
 175                         dev_connected = true;
 176                     }
 177                 }
 178             }
 179         }
 180     }
 181     return dev != NULL;
 182 }
 183
 184 /*virtual*/ void USBHostMultiSerial::setVidPid(uint16_t vid, uint16_t pid)
 185 {
 186     // we don't check VID/PID for MSD driver
 187 }
 188
 189 /*virtual*/ bool USBHostMultiSerial::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
 190 {
 191     if ((ports_found < USBHOST_SERIAL) &&
 192         CHECK_INTERFACE(intf_class, intf_subclass, intf_protocol)) {
 193         port_intf[ports_found++] = intf_nb;
 194         return true;
 195     }
 196     return false;
 197 }
 198
 199 /*virtual*/ bool USBHostMultiSerial::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
 200 {
 201     if ((ports_found > 0) && (intf_nb == port_intf[ports_found-1])) {
 202         if (type == BULK_ENDPOINT)
 203             return true;
 204     }
 205     return false;
 206 }
 207
 208 #endif
 209
 210 //------------------------------------------------------------------------------
 211
 212 #define SET_LINE_CODING 0x20
 213
 214 USBHostSerialPort::USBHostSerialPort(): circ_buf()
 215 {
 216     init();
 217 }
 218
 219 void USBHostSerialPort::init(void)
 220 {
 221     host = NULL;
 222     dev = NULL;
 223     serial_intf = NULL;
 224     size_bulk_in = 0;
 225     size_bulk_out = 0;
 226     bulk_in = NULL;
 227     bulk_out = NULL;
 228     line_coding.baudrate = 9600;
 229     line_coding.data_bits = 8;
 230     line_coding.parity = None;
 231     line_coding.stop_bits = 1;
 232     circ_buf.flush();
 233 }
 234
 235 void USBHostSerialPort::connect(USBHost* _host, USBDeviceConnected * _dev,
 236         uint8_t _serial_intf, USBEndpoint* _bulk_in, USBEndpoint* _bulk_out)
 237 {
 238     host = _host;
 239     dev = _dev;
 240     serial_intf = _serial_intf;
 241     bulk_in = _bulk_in;
 242     bulk_out = _bulk_out;
 243
 244     USB_INFO("New Serial device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, serial_intf);
 245     dev->setName("Serial", serial_intf);
 246     host->registerDriver(dev, serial_intf, this, &USBHostSerialPort::init);
 247     baud(9600);
 248     size_bulk_in = bulk_in->getSize();
 249     size_bulk_out = bulk_out->getSize();
 250     bulk_in->attach(this, &USBHostSerialPort::rxHandler);
 251     bulk_out->attach(this, &USBHostSerialPort::txHandler);
 252     host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
 253 }
 254
 255 void USBHostSerialPort::rxHandler() {
 256     if (bulk_in) {
 257         int len = bulk_in->getLengthTransferred();
 258         if (bulk_in->getState() == USB_TYPE_IDLE) {
 259             for (int i = 0; i < len; i++) {
 260                 circ_buf.queue(buf[i]);
 261             }
 262             rx.call();
 263             host->bulkRead(dev, bulk_in, buf, size_bulk_in, false);
 264         }
 265     }
 266 }
 267
 268 void USBHostSerialPort::txHandler() {
 269     if (bulk_out) {
 270         if (bulk_out->getState() == USB_TYPE_IDLE) {
 271             tx.call();
 272         }
 273     }
 274 }
 275
 276 int USBHostSerialPort::_putc(int c) {
 277     if (bulk_out) {
 278         if (host->bulkWrite(dev, bulk_out, (uint8_t *)&c, 1) == USB_TYPE_OK) {
 279             return 1;
 280         }
 281     }
 282     return -1;
 283 }
 284
 285 void USBHostSerialPort::baud(int baudrate) {
 286     line_coding.baudrate = baudrate;
 287     format(line_coding.data_bits, (Parity)line_coding.parity, line_coding.stop_bits);
 288 }
 289
 290 void USBHostSerialPort::format(int bits, Parity parity, int stop_bits) {
 291     line_coding.data_bits = bits;
 292     line_coding.parity = parity;
 293     line_coding.stop_bits = (stop_bits == 1) ? 0 : 2;
 294
 295     // set line coding
 296     host->controlWrite( dev,
 297                         USB_RECIPIENT_INTERFACE | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_CLASS,
 298                         SET_LINE_CODING,
 299                         0, serial_intf, (uint8_t *)&line_coding, 7);
 300 }
 301
 302 int USBHostSerialPort::_getc() {
 303     uint8_t c = 0;
 304     if (bulk_in == NULL) {
 305         init();
 306         return -1;
 307     }
 308     while (circ_buf.isEmpty());
 309     circ_buf.dequeue(&c);
 310     return c;
 311 }
 312
 313 int USBHostSerialPort::writeBuf(const char* b, int s)
 314 {
 315     int c = 0;
 316     if (bulk_out)
 317     {
 318         while (c < s)
 319         {
 320             int i = (s < size_bulk_out) ? s : size_bulk_out;
 321             if (host->bulkWrite(dev, bulk_out, (uint8_t *)(b+c), i) == USB_TYPE_OK)
 322                 c += i;
 323         }
 324     }
 325     return s;
 326 }
 327
 328 int USBHostSerialPort::readBuf(char* b, int s)
 329 {
 330     int i = 0;
 331     if (bulk_in)
 332     {
 333         for (i = 0; i < s; )
 334             b[i++] = getc();
 335     }
 336     return i;
 337 }
 338
 339 uint8_t USBHostSerialPort::available() {
 340     return circ_buf.available();
 341 }
 342
 343
 344
 345 #endif