USBHost.cpp

00001 /* mbed USBHost Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "USBHost.h"
00018 
00019 #define USB_TRACE1(A) while(0)
00020 #undef USB_TEST_ASSERT
00021 void usb_test_assert_internal(const char *expr, const char *file, int line);
00022 #define USB_TEST_ASSERT(EXPR) while(!(EXPR)){usb_test_assert_internal(#EXPR,__FILE__,__LINE__);}
00023 
00024 USBHost* USBHost::inst = NULL;
00025 
00026 USBHost* USBHost::getHostInst() {
00027     if (inst == NULL) {
00028         inst = new USBHost();
00029         inst->init();
00030     }
00031     return inst;
00032 }
00033 
00034 void USBHost::poll()
00035 {
00036     if (inst) {
00037         inst->task();
00038     }
00039 }
00040 
00041 USBHost::USBHost() {
00042 }
00043 
00044 /* virtual */ bool USBHost::addDevice(USBDeviceConnected* parent, int port, bool lowSpeed) {
00045     USBDeviceConnected* dev = new USBDeviceConnected;
00046     USBEndpoint* ep = new USBEndpoint(dev);
00047     dev->init(0, port, lowSpeed);
00048     dev->setAddress(0);
00049     dev->setEpCtl(ep);
00050     uint8_t desc[18];
00051     wait_ms(100);
00052 
00053     int rc = controlRead(dev, 0x80, GET_DESCRIPTOR, 1<<8, 0, desc, 8);
00054     USB_TEST_ASSERT(rc == USB_TYPE_OK);
00055     if (rc != USB_TYPE_OK) {
00056         USB_ERR("ADD DEVICE FAILD");
00057     }
00058     USB_DBG_HEX(desc, 8);
00059     DeviceDescriptor* dev_desc = reinterpret_cast<DeviceDescriptor*>(desc);
00060     ep->setSize(dev_desc->bMaxPacketSize);
00061 
00062     int new_addr = USBDeviceConnected::getNewAddress();
00063     rc = controlWrite(dev, 0x00, SET_ADDRESS, new_addr, 0, NULL, 0);
00064     USB_TEST_ASSERT(rc == USB_TYPE_OK);
00065     dev->setAddress(new_addr);
00066     wait_ms(100);
00067 
00068     rc = controlRead(dev, 0x80, GET_DESCRIPTOR, 1<<8, 0, desc, sizeof(desc));
00069     USB_TEST_ASSERT(rc == USB_TYPE_OK);
00070     USB_DBG_HEX(desc, sizeof(desc));
00071 
00072     dev->setVid(dev_desc->idVendor);
00073     dev->setPid(dev_desc->idProduct);
00074     dev->setClass(dev_desc->bDeviceClass);
00075     USB_INFO("parent:%p port:%d speed:%s VID:%04x PID:%04x class:%02x addr:%d",
00076         parent, port, (lowSpeed ? "low " : "full"), dev->getVid(), dev->getPid(), dev->getClass(),
00077         dev->getAddress());
00078 
00079     DeviceLists.push_back(dev);
00080 
00081     if (dev->getClass() == HUB_CLASS) {
00082         const int config = 1;
00083         int rc = controlWrite(dev, 0x00, SET_CONFIGURATION, config, 0, NULL, 0);
00084         USB_TEST_ASSERT(rc == USB_TYPE_OK);
00085         wait_ms(100);
00086         Hub(dev);
00087     }
00088     return true;
00089 }
00090 
00091 // enumerate a device with the control USBEndpoint
00092 USB_TYPE USBHost::enumerate(USBDeviceConnected * dev, IUSBEnumerator* pEnumerator)
00093 {
00094     if (dev->getClass() == HUB_CLASS) { // skip hub class
00095         return USB_TYPE_OK;
00096     }
00097     uint8_t desc[18];
00098     USB_TYPE rc = controlRead(dev, 0x80, GET_DESCRIPTOR, 1<<8, 0, desc, sizeof(desc));
00099     USB_TEST_ASSERT(rc == USB_TYPE_OK);
00100     USB_DBG_HEX(desc, sizeof(desc));
00101     if (rc != USB_TYPE_OK) {
00102         return rc;
00103     }
00104     DeviceDescriptor* dev_desc = reinterpret_cast<DeviceDescriptor*>(desc);
00105     dev->setClass(dev_desc->bDeviceClass);
00106     pEnumerator->setVidPid(dev->getVid(), dev->getPid());
00107 
00108     rc = controlRead(dev, 0x80, GET_DESCRIPTOR, 2<<8, 0, desc, 4);
00109     USB_TEST_ASSERT(rc == USB_TYPE_OK);
00110     USB_DBG_HEX(desc, 4);
00111 
00112     int TotalLength = desc[2]|desc[3]<<8;
00113     uint8_t* buf = new uint8_t[TotalLength];
00114     rc = controlRead(dev, 0x80, GET_DESCRIPTOR, 2<<8, 0, buf, TotalLength);
00115     USB_TEST_ASSERT(rc == USB_TYPE_OK);
00116     //USB_DBG_HEX(buf, TotalLength);
00117 
00118     // Parse the configuration descriptor
00119     parseConfDescr(dev, buf, TotalLength, pEnumerator);
00120     delete[] buf;
00121     // only set configuration if not enumerated before
00122     if (!dev->isEnumerated()) {
00123         USB_DBG("Set configuration 1 on dev: %p", dev);
00124         // sixth step: set configuration (only 1 supported)
00125         int config = 1;
00126         USB_TYPE res = controlWrite(dev, 0x00, SET_CONFIGURATION, config, 0, NULL, 0);
00127         if (res != USB_TYPE_OK) {
00128             USB_ERR("SET CONF FAILED");
00129             return res;
00130         }
00131         // Some devices may require this delay
00132         wait_ms(100);
00133         dev->setEnumerated();
00134         // Now the device is enumerated!
00135         USB_DBG("dev %p is enumerated", dev);
00136     }
00137     return USB_TYPE_OK;
00138 }
00139 
00140 // this method fills the USBDeviceConnected object: class,.... . It also add endpoints found in the descriptor.
00141 void USBHost::parseConfDescr(USBDeviceConnected * dev, uint8_t * conf_descr, uint32_t len, IUSBEnumerator* pEnumerator)
00142 {
00143     uint32_t index = 0;
00144     uint32_t len_desc = 0;
00145     uint8_t id = 0;
00146     USBEndpoint * ep = NULL;
00147     uint8_t intf_nb = 0;
00148     bool parsing_intf = false;
00149     uint8_t current_intf = 0;
00150     EndpointDescriptor* ep_desc;
00151 
00152     while (index < len) {
00153         len_desc = conf_descr[index];
00154         id = conf_descr[index+1];
00155         USB_DBG_HEX(conf_descr+index, len_desc);
00156         switch (id) {
00157             case CONFIGURATION_DESCRIPTOR:
00158                 USB_DBG("dev: %p has %d intf", dev, conf_descr[4]);
00159                 dev->setNbIntf(conf_descr[4]);
00160                 break;
00161             case INTERFACE_DESCRIPTOR:
00162                 if(pEnumerator->parseInterface(conf_descr[index + 2], conf_descr[index + 5], conf_descr[index + 6], conf_descr[index + 7])) {
00163                     intf_nb++;
00164                     current_intf = conf_descr[index + 2];
00165                     dev->addInterface(current_intf, conf_descr[index + 5], conf_descr[index + 6], conf_descr[index + 7]);
00166                     USB_DBG("ADD INTF %d on device %p: class: %d, subclass: %d, proto: %d", current_intf, dev, conf_descr[index + 5],conf_descr[index + 6],conf_descr[index + 7]);
00167                     parsing_intf = true;
00168                 } else {
00169                     parsing_intf = false;
00170                 }
00171                 break;
00172             case ENDPOINT_DESCRIPTOR:
00173                 ep_desc = reinterpret_cast<EndpointDescriptor*>(conf_descr+index);
00174                 if (parsing_intf && (intf_nb <= MAX_INTF) ) {
00175                     ENDPOINT_TYPE type = (ENDPOINT_TYPE)(ep_desc->bmAttributes & 0x03);
00176                     ENDPOINT_DIRECTION dir = (ep_desc->bEndpointAddress & 0x80) ? IN : OUT;
00177                     if(pEnumerator->useEndpoint(current_intf, type, dir)) {
00178                         ep = new USBEndpoint(dev);
00179                         ep->init(type, dir, ep_desc->wMaxPacketSize, ep_desc->bEndpointAddress);
00180                         USB_DBG("ADD USBEndpoint %p, on interf %d on device %p", ep, current_intf, dev);
00181                         dev->addEndpoint(current_intf, ep);
00182                     }
00183                 }
00184                 break;
00185             case HID_DESCRIPTOR:
00186                 //lenReportDescr = conf_descr[index + 7] | (conf_descr[index + 8] << 8);
00187                 break;
00188             default:
00189                 break;
00190         }
00191         index += len_desc;
00192     }
00193 }
00194 
00195 USB_TYPE USBHost::controlRead(USBDeviceConnected* dev, uint8_t requestType, uint8_t request, uint32_t value, uint32_t index, uint8_t * buf, uint32_t len) {
00196     USBEndpoint* ep = dev->getEpCtl();
00197     SETUP_PACKET setup(requestType, request, value, index, len);
00198 
00199     int result = token_setup(ep, &setup, len); // setup stage
00200     USB_TRACE1(result);
00201     if (result < 0) {
00202         return USB_TYPE_ERROR;
00203     }
00204 
00205     int read_len = multi_token_in(ep, buf, len); // data stage
00206     USB_TRACE1(read_len);
00207     if (read_len < 0) {
00208         return USB_TYPE_ERROR;
00209     }
00210 
00211     setToggle(ep, 1); // DATA1
00212     result = multi_token_out(ep); // status stage
00213     USB_TRACE1(result);
00214     if (result < 0) {
00215         return USB_TYPE_ERROR;
00216     }
00217     ep->setLengthTransferred(read_len);
00218     return USB_TYPE_OK;
00219 }
00220 
00221 USB_TYPE USBHost::controlWrite(USBDeviceConnected* dev, uint8_t requestType, uint8_t request, uint32_t value, uint32_t index, uint8_t * buf, uint32_t len) {
00222     USBEndpoint* ep = dev->getEpCtl();
00223     SETUP_PACKET setup(requestType, request, value, index, len);
00224 
00225     int result = token_setup(ep, &setup, len); // setup stage
00226     USB_TRACE1(result);
00227     if (result < 0) {
00228         return USB_TYPE_ERROR;
00229     }
00230     int write_len = 0;
00231     if (buf != NULL) {
00232         write_len = multi_token_out(ep, buf, len); // data stage
00233         USB_TRACE1(write_len);
00234         if (write_len < 0) {
00235             return USB_TYPE_ERROR;
00236         }
00237     }
00238 
00239     setToggle(ep, 1); // DATA1
00240     result = multi_token_in(ep); // status stage
00241     USB_TRACE1(result);
00242     if (result < 0) {
00243         return USB_TYPE_ERROR;
00244     }
00245     ep->setLengthTransferred(write_len);
00246     return USB_TYPE_OK;
00247 }
00248 
00249 USB_TYPE USBHost::bulkRead(USBDeviceConnected* dev, USBEndpoint* ep, uint8_t* buf, uint32_t len, bool blocking) {
00250     if (blocking == false) {
00251         ep->setBuffer(buf, len);
00252         ep_queue.push(ep);
00253         multi_token_inNB(ep, buf, len);
00254         return USB_TYPE_PROCESSING;
00255     }
00256     int result = multi_token_in(ep, buf, len);
00257     USB_TRACE1(result);
00258     if (result < 0) {
00259         return USB_TYPE_ERROR;
00260     }
00261     ep->setLengthTransferred(result);
00262     return USB_TYPE_OK;
00263 }
00264 
00265 USB_TYPE USBHost::bulkWrite(USBDeviceConnected* dev, USBEndpoint* ep, uint8_t* buf, uint32_t len, bool blocking) {
00266     USB_TEST_ASSERT(blocking);
00267     int result = multi_token_out(ep, buf, len);
00268     USB_TRACE1(result);
00269     if (result < 0) {
00270         return USB_TYPE_ERROR;
00271     }
00272     ep->setLengthTransferred(result);
00273     return USB_TYPE_OK;
00274 }
00275 
00276 USB_TYPE USBHost::interruptRead(USBDeviceConnected* dev, USBEndpoint* ep, uint8_t* buf, uint32_t len, bool blocking) {
00277     if (blocking == false) {
00278         ep->setBuffer(buf, len);
00279         ep_queue.push(ep);
00280         multi_token_inNB(ep, buf, len);
00281         return USB_TYPE_PROCESSING;
00282     }
00283     int result = multi_token_in(ep, buf, len);
00284     USB_TRACE1(result);
00285     if (result < 0) {
00286         return USB_TYPE_ERROR;
00287     }
00288     ep->setLengthTransferred(result);
00289     return USB_TYPE_OK;
00290 }
00291 
00292 USB_TYPE USBHost::interruptWrite(USBDeviceConnected* dev, USBEndpoint* ep, uint8_t* buf, uint32_t len, bool blocking) {
00293     USB_TEST_ASSERT(blocking);
00294     int result = multi_token_out(ep, buf, len);
00295     USB_TRACE1(result);
00296     if (result < 0) {
00297         return USB_TYPE_ERROR;
00298     }
00299     ep->setLengthTransferred(result);
00300     return USB_TYPE_OK;
00301 }
00302 
00303 USB_TYPE USBHost::isochronousRead(USBDeviceConnected* dev, USBEndpoint* ep, uint8_t* buf, uint32_t len, bool blocking) {
00304     USB_TEST_ASSERT(blocking);
00305     isochronousReadNB(ep, buf, len);
00306     return USB_TYPE_OK;
00307 }
00308 
00309 int USBHost::interruptReadNB(USBEndpoint* ep, uint8_t* data, int size) {
00310     USB_TRACE1(size);
00311     if (ep->getState() != USB_TYPE_PROCESSING) {
00312         ep->setState(USB_TYPE_PROCESSING);
00313         ep->setBuffer(data, size);
00314         multi_token_inNB(ep, data, size);
00315     }
00316     if (multi_token_inNB_result(ep) != USB_TYPE_PROCESSING) {
00317         return ep->getLengthTransferred();
00318     }
00319     return -1;
00320 }
00321 
00322 int USBHost::bulkReadNB(USBEndpoint* ep, uint8_t* data, int size) {
00323     USB_TRACE1(size);
00324     return interruptReadNB(ep, data, size);
00325 }
00326 
00327 int USBHost::isochronousReadNB(USBEndpoint* ep, uint8_t* data, int size) {
00328     USB_TRACE1(size);
00329     int result = token_iso_in(ep, data, size);
00330     if (result >= 0) {
00331          ep->setLengthTransferred(result);
00332     }
00333     return result;
00334 }
00335 
00336 void USBHost::task() {
00337     USBEndpoint* ep = ep_queue.pop();
00338     if (ep) {
00339         USB_TEST_ASSERT(ep->getDir() == IN);
00340         if (multi_token_inNB_result(ep) != USB_TYPE_PROCESSING) {
00341             ep->call();
00342         } else {
00343             ep_queue.push(ep);
00344         }
00345     }
00346 }
00347 
00348 void usb_test_assert_internal(const char *expr, const char *file, int line){
00349     error("\n\n%s@%d %s ASSERT!\n\n", file, line, expr);
00350 }
00351