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usbtransfer.c
192 lines (172 loc) · 5.62 KB
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usbtransfer.c
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#include "usbtransfer.h"
void printCBWBuffer(uint8_t * cbwBuffer) {
int i = 0;
printf("cbwBuffer: \n");
for(i=0;i<32;i++) {
if((i%4==0) && (i!=0))
printf(" %x ",cbwBuffer[i]);
else
printf("%x ",cbwBuffer[i]);
}
printf("\n");
}
void uint32_tToUint8_tArray(uint8_t * array , uint32_t i) {
/* convert uint32_t to uint8_t array */
array[0]=i;
array[1]=i>>8;
array[2]=i>>16;
array[3]=i>>24;
}
void setUpCBWBuffer(uint8_t * cbwBuffer,
_usbDirection usbDirection,
uint32_t dCBWDataDtransferLength,
uint32_t numberOfBlocks,
uint32_t startBlock
) {
/* Prepare the CBW Message to be send later
*
*/
memset (cbwBuffer,0,32);
uint32_t dCBWTag;
uint8_t tmp[4];
int i = 0;
int j = 0;
//set dCBWSignature to 55 53 42 43 - sniffed
cbwBuffer[0]=0x55;
cbwBuffer[1]=0x53;
cbwBuffer[2]=0x42;
cbwBuffer[3]=0x43;
//set dCBWTag
dCBWTag = 1;//rand() %1000;
/* FIXME use memcpy*/
uint32_tToUint8_tArray(tmp,dCBWTag);
i = 4;
j = 0;
while(j<4) {
cbwBuffer[i++]=tmp[j++];
}
//set dCBWDataDtransferLength
uint32_tToUint8_tArray(tmp,dCBWDataDtransferLength);
i = 8;
j = 0;
while(j<4) {
cbwBuffer[i++]=tmp[j++];
}
switch(usbDirection) {
case READ10: cbwBuffer[12]=0x80; //0x80 (data in) usb -> host
cbwBuffer[15]=0x28; //set read 10;
break;
case WRITE10: cbwBuffer[12]=0x0; //0x00 (data out) host -> usb
cbwBuffer[15]=0x2a; //set write 10;
break;
}
//set up bCBWLUN - sniffed
cbwBuffer[14]=0x0a;
//start block
cbwBuffer[17]=startBlock>>24;
cbwBuffer[18]=startBlock>>16;
cbwBuffer[19]=startBlock>>8;
cbwBuffer[20]=startBlock;
//no of blocks
cbwBuffer[22]=numberOfBlocks>>8;
cbwBuffer[23]=numberOfBlocks;
}
void read10(uint8_t * readBuffer, uint32_t numberOfBlocks,uint32_t startBlock, usb_dev_handle *dev) {
int bytesRead=0;
int byteReadCounter=0;
_usbDirection usbDirection = READ10;
const int blockSize = 512; //FIXME: read block size from device!
uint32_t lengthInByte=blockSize*numberOfBlocks;
uint8_t cbwBuffer[31];
uint8_t cswBuffer[13];
//Set up Buffers
memset (cswBuffer,0,13);
setUpCBWBuffer(cbwBuffer,usbDirection,lengthInByte,numberOfBlocks,startBlock);
//FIXME: remove later!
//printCBWBuffer(cbwBuffer);
//request read
if ( (usb_bulk_write(dev, EP_OUT, cbwBuffer, 31, 5000)) <0 ) {
perror("usb bulk write failed\n");
exit(EXIT_FAILURE);
}
//read
while (byteReadCounter!=lengthInByte) {
bytesRead = usb_bulk_read(dev,
EP_IN,
readBuffer,
((lengthInByte-byteReadCounter > 4096) ? 4096: lengthInByte-byteReadCounter),
5000);
if (bytesRead <0 ) {
perror("usb bulk read failed\n");
exit(EXIT_FAILURE);
}
//FIXME: remove this line
//printf("READ: %i\n",((lengthInByte-byteReadCounter > 4096) ? 4096: lengthInByte-byteReadCounter));
//update counter
byteReadCounter=byteReadCounter+bytesRead;
readBuffer=readBuffer+bytesRead*sizeof(uint8_t);
//FIXME: check CSW!
bytesRead = usb_bulk_read(dev, EP_IN, cswBuffer, 13, 5000);
//printf("bytes Read %i \n",bytesRead);
if ( bytesRead <0 ) {
perror("usb read failed\n");
exit(EXIT_FAILURE);
}
}
}
void write10(uint8_t * writeBuffer, uint32_t numberOfBlocks,uint32_t startBlock, usb_dev_handle *dev) {
int bytesWrite=0;
int bytesRead=0;
int byteWriteCounter=0;
_usbDirection usbDirection = WRITE10;
const int blockSize = 512; //FIXME: read block size from device!
uint32_t lengthInByte=blockSize*numberOfBlocks;
uint8_t cbwBuffer[31];
uint8_t cswBuffer[13];
//Set up Buffers
memset (cswBuffer,0,13);
setUpCBWBuffer(cbwBuffer,usbDirection,lengthInByte,numberOfBlocks,startBlock);
//FIXME: remove later!
//printCBWBuffer(cbwBuffer);
//request write
if ( (usb_bulk_write(dev, EP_OUT, cbwBuffer, 31, 5000)) <0 ) {
perror("usb bulk write failed\n");
exit(EXIT_FAILURE);
}
//read
while (byteWriteCounter!=lengthInByte) {
bytesWrite = usb_bulk_write(dev,
EP_OUT,
writeBuffer,
((lengthInByte-byteWriteCounter > 4096) ? 4096: lengthInByte-byteWriteCounter),
5000);
if (bytesWrite <0 ) {
perror("usb bulk write failed\n");
exit(EXIT_FAILURE);
}
//FIXME: remove this line
//printf("WRITE: %i\n",((lengthInByte-byteWriteCounter > 4096) ? 4096: lengthInByte-byteWriteCounter));
//update counter
byteWriteCounter=byteWriteCounter+bytesWrite;
writeBuffer=writeBuffer+bytesWrite*sizeof(uint8_t);
//FIXME: check CSW!
bytesRead = usb_bulk_read(dev, EP_IN, cswBuffer, 13, 5000);
//printf("bytes Read %i \n",bytesRead);
if ( bytesRead <0 ) {
perror("usb read failed\n");
exit(EXIT_FAILURE);
}
}
}
usb_dev_handle *open_dev(void) {
struct usb_bus *bus;
struct usb_device *dev;
for (bus = usb_get_busses(); bus; bus = bus->next){
for (dev = bus->devices; dev; dev = dev->next){
if (dev->descriptor.idVendor == SUNDRIVER_VID && dev->descriptor.idProduct == SUNDRIVER_PID){
return usb_open(dev);
}
}
}
return NULL;
}