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THIS REQUIRES A BOOTROM UPDATE!! To save FPGA area, split the LF and …

…HF bitstreams and load them on-demand.
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iZsh committed Jun 19, 2014
1 parent d51b2ed commit 7cc204bff881ce1d1833d8e93469f6bbba80c70e
@@ -19,11 +19,13 @@ lua
luac

fpga/*
!fpga/fpga.bit
!fpga/fpga_lf.bit
!fpga/fpga_hf.bit
!fpga/*.v
!fpga/Makefile
!fpga/fpga.ucf
!fpga/xst.scr
!fpga/xst_lf.scr
!fpga/xst_hf.scr
!fpga/go.bat
!fpga/sim.tcl

@@ -52,10 +52,13 @@ OBJS = $(OBJDIR)/osimage.s19 $(OBJDIR)/fpgaimage.s19

all: $(OBJS)

$(OBJDIR)/fpga.o: fpga.bit
$(OBJCOPY) -O elf32-littlearm -I binary -B arm --redefine-sym _binary____fpga_fpga_bit_start=_binary_fpga_bit_start --redefine-sym _binary____fpga_fpga_bit_end=_binary_fpga_bit_end --prefix-sections=fpga_bit $^ $@
$(OBJDIR)/fpga_lf.o: fpga_lf.bit
$(OBJCOPY) -O elf32-littlearm -I binary -B arm --redefine-sym _binary____fpga_fpga_lf_bit_start=_binary_fpga_lf_bit_start --redefine-sym _binary____fpga_fpga_lf_bit_end=_binary_fpga_lf_bit_end --prefix-sections=fpga_lf_bit $^ $@

$(OBJDIR)/fullimage.elf: $(VERSIONOBJ) $(OBJDIR)/fpga.o $(THUMBOBJ) $(ARMOBJ)
$(OBJDIR)/fpga_hf.o: fpga_hf.bit
$(OBJCOPY) -O elf32-littlearm -I binary -B arm --redefine-sym _binary____fpga_fpga_hf_bit_start=_binary_fpga_hf_bit_start --redefine-sym _binary____fpga_fpga_hf_bit_end=_binary_fpga_hf_bit_end --prefix-sections=fpga_hf_bit $^ $@

$(OBJDIR)/fullimage.elf: $(VERSIONOBJ) $(OBJDIR)/fpga_lf.o $(OBJDIR)/fpga_hf.o $(THUMBOBJ) $(ARMOBJ)
$(CC) $(LDFLAGS) -Wl,-T,ldscript,-Map,$(patsubst %.elf,%.map,$@) -o $@ $^ $(LIBS)

$(OBJDIR)/fpgaimage.elf: $(OBJDIR)/fullimage.elf
@@ -214,6 +214,7 @@ void MeasureAntennaTuning(void)
* ( hopefully around 95 if it is tuned to 125kHz!)
*/

FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
for (i=255; i>19; i--) {
WDT_HIT();
@@ -236,6 +237,7 @@ void MeasureAntennaTuning(void)

LED_A_ON();
// Let the FPGA drive the high-frequency antenna around 13.56 MHz.
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
SpinDelay(20);
// Vref = 3300mV, and an 10:1 voltage divider on the input
@@ -264,6 +266,7 @@ void MeasureAntennaTuningHf(void)

for (;;) {
// Let the FPGA drive the high-frequency antenna around 13.56 MHz.
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
SpinDelay(20);
// Vref = 3300mV, and an 10:1 voltage divider on the input
@@ -286,6 +289,7 @@ void SimulateTagHfListen(void)

// We're using this mode just so that I can test it out; the simulated
// tag mode would work just as well and be simpler.
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR | FPGA_HF_READER_RX_XCORR_848_KHZ | FPGA_HF_READER_RX_XCORR_SNOOP);

// We need to listen to the high-frequency, peak-detected path.
@@ -365,6 +369,7 @@ void SendVersion(void)
void SamyRun()
{
DbpString("Stand-alone mode! No PC necessary.");
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);

// 3 possible options? no just 2 for now
#define OPTS 2
@@ -923,6 +928,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
break;

case CMD_SET_LF_DIVISOR:
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, c->arg[0]);
break;

@@ -1017,7 +1023,8 @@ void __attribute__((noreturn)) AppMain(void)
AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;

// Load the FPGA image, which we have stored in our flash.
FpgaDownloadAndGo();
// (the HF version by default)
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

StartTickCount();

@@ -67,7 +67,8 @@ extern uint32_t BigBuf[];
/// fpga.h
void FpgaSendCommand(uint16_t cmd, uint16_t v);
void FpgaWriteConfWord(uint8_t v);
void FpgaDownloadAndGo(void);
void FpgaDownloadAndGo(int bitstream_version);
int FpgaGatherBitstreamVersion();
void FpgaGatherVersion(char *dst, int len);
void FpgaSetupSsc(void);
void SetupSpi(int mode);
@@ -77,32 +78,35 @@ bool FpgaSetupSscDma(uint8_t *buf, int len);
void SetAdcMuxFor(uint32_t whichGpio);

// Definitions for the FPGA commands.
#define FPGA_CMD_SET_CONFREG (1<<12)
#define FPGA_CMD_SET_DIVISOR (2<<12)
#define FPGA_CMD_SET_CONFREG (1<<12)
#define FPGA_CMD_SET_DIVISOR (2<<12)
// Definitions for the FPGA configuration word.
#define FPGA_MAJOR_MODE_LF_READER (0<<5)
// LF
#define FPGA_MAJOR_MODE_LF_READER (0<<5)
#define FPGA_MAJOR_MODE_LF_EDGE_DETECT (1<<5)
#define FPGA_MAJOR_MODE_HF_READER_TX (2<<5)
#define FPGA_MAJOR_MODE_HF_READER_RX_XCORR (3<<5)
#define FPGA_MAJOR_MODE_HF_SIMULATOR (4<<5)
#define FPGA_MAJOR_MODE_HF_ISO14443A (5<<5)
#define FPGA_MAJOR_MODE_LF_PASSTHRU (6<<5)
#define FPGA_MAJOR_MODE_OFF (7<<5)
#define FPGA_MAJOR_MODE_LF_PASSTHRU (2<<5)
// HF
#define FPGA_MAJOR_MODE_HF_READER_TX (0<<5)
#define FPGA_MAJOR_MODE_HF_READER_RX_XCORR (1<<5)
#define FPGA_MAJOR_MODE_HF_SIMULATOR (2<<5)
#define FPGA_MAJOR_MODE_HF_ISO14443A (3<<5)
// BOTH
#define FPGA_MAJOR_MODE_OFF (7<<5)
// Options for LF_EDGE_DETECT
#define FPGA_LF_EDGE_DETECT_READER_FIELD (1<<0)
// Options for the HF reader, tx to tag
#define FPGA_HF_READER_TX_SHALLOW_MOD (1<<0)
// Options for the HF reader, correlating against rx from tag
#define FPGA_HF_READER_RX_XCORR_848_KHZ (1<<0)
#define FPGA_HF_READER_RX_XCORR_SNOOP (1<<1)
#define FPGA_HF_READER_RX_XCORR_QUARTER_FREQ (1<<2)
#define FPGA_HF_READER_RX_XCORR_QUARTER_FREQ (1<<2)
// Options for the HF simulated tag, how to modulate
#define FPGA_HF_SIMULATOR_NO_MODULATION (0<<0)
#define FPGA_HF_SIMULATOR_MODULATE_BPSK (1<<0)
#define FPGA_HF_SIMULATOR_MODULATE_212K (2<<0)
#define FPGA_HF_SIMULATOR_MODULATE_424K (4<<0)
// Options for ISO14443A
#define FPGA_HF_ISO14443A_SNIFFER (0<<0)
#define FPGA_HF_ISO14443A_SNIFFER (0<<0)
#define FPGA_HF_ISO14443A_TAGSIM_LISTEN (1<<0)
#define FPGA_HF_ISO14443A_TAGSIM_MOD (2<<0)
#define FPGA_HF_ISO14443A_READER_LISTEN (3<<0)
@@ -252,7 +252,7 @@ static void DownloadFPGA(const char *FpgaImage, int FpgaImageLen, int byterevers

static char *bitparse_headers_start;
static char *bitparse_bitstream_end;
static int bitparse_initialized;
static int bitparse_initialized = 0;
/* Simple Xilinx .bit parser. The file starts with the fixed opaque byte sequence
* 00 09 0f f0 0f f0 0f f0 0f f0 00 00 01
* After that the format is 1 byte section type (ASCII character), 2 byte length
@@ -322,12 +322,28 @@ int bitparse_find_section(char section_name, char **section_start, unsigned int
// Find out which FPGA image format is stored in flash, then call DownloadFPGA
// with the right parameters to download the image
//-----------------------------------------------------------------------------
extern char _binary_fpga_bit_start, _binary_fpga_bit_end;
void FpgaDownloadAndGo(void)
extern char _binary_fpga_lf_bit_start, _binary_fpga_lf_bit_end;
extern char _binary_fpga_hf_bit_start, _binary_fpga_hf_bit_end;
void FpgaDownloadAndGo(int bitstream_version)
{
void *bit_start;
void *bit_end;

// check whether or not the bitstream is already loaded
if (FpgaGatherBitstreamVersion() == bitstream_version)
return;

if (bitstream_version == FPGA_BITSTREAM_LF) {
bit_start = &_binary_fpga_lf_bit_start;
bit_end = &_binary_fpga_lf_bit_end;
} else if (bitstream_version == FPGA_BITSTREAM_HF) {
bit_start = &_binary_fpga_hf_bit_start;
bit_end = &_binary_fpga_hf_bit_end;
} else
return;
/* Check for the new flash image format: Should have the .bit file at &_binary_fpga_bit_start
*/
if(bitparse_init(&_binary_fpga_bit_start, &_binary_fpga_bit_end)) {
if(bitparse_init(bit_start, bit_end)) {
/* Successfully initialized the .bit parser. Find the 'e' section and
* send its contents to the FPGA.
*/
@@ -351,6 +367,17 @@ void FpgaDownloadAndGo(void)
DownloadFPGA((char*)0x102000, 10524*4, 1);
}

int FpgaGatherBitstreamVersion()
{
char temp[256];
FpgaGatherVersion(temp, sizeof (temp));
if (!memcmp("LF", temp, 2))
return FPGA_BITSTREAM_LF;
else if (!memcmp("HF", temp, 2))
return FPGA_BITSTREAM_HF;
return FPGA_BITSTREAM_ERR;
}

void FpgaGatherVersion(char *dst, int len)
{
char *fpga_info;
@@ -359,13 +386,15 @@ void FpgaGatherVersion(char *dst, int len)
if(!bitparse_find_section('e', &fpga_info, &fpga_info_len)) {
strncat(dst, "FPGA image: legacy image without version information", len-1);
} else {
strncat(dst, "FPGA image built", len-1);
/* USB packets only have 48 bytes data payload, so be terse */
#if 0
if(bitparse_find_section('a', &fpga_info, &fpga_info_len) && fpga_info[fpga_info_len-1] == 0 ) {
strncat(dst, " from ", len-1);
strncat(dst, fpga_info, len-1);
if (!memcmp("fpga_lf", fpga_info, 7))
strncat(dst, "LF ", len-1);
else if (!memcmp("fpga_hf", fpga_info, 7))
strncat(dst, "HF ", len-1);
}
strncat(dst, "FPGA image built", len-1);
#if 0
if(bitparse_find_section('b', &fpga_info, &fpga_info_len) && fpga_info[fpga_info_len-1] == 0 ) {
strncat(dst, " for ", len-1);
strncat(dst, fpga_info, len-1);
@@ -743,6 +743,7 @@ void SnoopHitag(uint32_t type) {

// Set up eavesdropping mode, frequency divisor which will drive the FPGA
// and analog mux selection.
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
@@ -966,6 +967,7 @@ void SimulateHitagTag(bool tag_mem_supplied, byte_t* data) {

// Set up simulator mode, frequency divisor which will drive the FPGA
// and analog mux selection.
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
@@ -1124,6 +1126,7 @@ void ReaderHitag(hitag_function htf, hitag_data* htd) {
bool bStop;
bool bQuitTraceFull = false;

FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
// Reset the return status
bSuccessful = false;

@@ -689,6 +689,8 @@ void RAMFUNC SnoopIClass(void)
// into trace, along with its length and other annotations.
//uint8_t *trace = (uint8_t *)BigBuf;

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

// reset traceLen to 0
iso14a_set_tracing(TRUE);
iso14a_clear_trace();
@@ -995,6 +997,8 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
{
uint8_t simType = arg0;

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

// Enable and clear the trace
tracing = TRUE;
traceLen = 0;
@@ -1426,6 +1430,8 @@ void ReaderIClass(uint8_t arg0) {

uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);

// Reset trace buffer
memset(trace, 0x44, RECV_CMD_OFFSET);
traceLen = 0;
@@ -350,6 +350,7 @@ void SimulateIso14443Tag(void)

int cmdsRecvd = 0;

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
memset(receivedCmd, 0x44, 400);

CodeIso14443bAsTag(response1, sizeof(response1));
@@ -867,6 +868,7 @@ void ReadSTMemoryIso14443(uint32_t dwLast)
{
uint8_t i = 0x00;

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Make sure that we start from off, since the tags are stateful;
// confusing things will happen if we don't reset them between reads.
LED_D_OFF();
@@ -1011,6 +1013,7 @@ void RAMFUNC SnoopIso14443(void)
// response from the tag.
int triggered = TRUE;

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// The command (reader -> tag) that we're working on receiving.
uint8_t *receivedCmd = (uint8_t *)(BigBuf) + DEMOD_TRACE_SIZE;
// The response (tag -> reader) that we're working on receiving.
@@ -1196,6 +1199,7 @@ void RAMFUNC SnoopIso14443(void)

void SendRawCommand14443B(uint32_t datalen, uint32_t recv,uint8_t powerfield, uint8_t data[])
{
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
if(!powerfield)
{
// Make sure that we start from off, since the tags are stateful;
@@ -1763,6 +1763,7 @@ int iso14443a_select_card(byte_t* uid_ptr, iso14a_card_select_t* p_hi14a_card, u
}

void iso14443a_setup(uint8_t fpga_minor_mode) {
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Set up the synchronous serial port
FpgaSetupSsc();
// connect Demodulated Signal to ADC:
@@ -606,6 +606,7 @@ void AcquireRawAdcSamplesIso15693(void)

int8_t prev = 0;

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
BuildIdentifyRequest();

SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
@@ -687,6 +688,7 @@ void RecordRawAdcSamplesIso15693(void)

int8_t prev = 0;

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Setup SSC
FpgaSetupSsc();

@@ -753,6 +755,7 @@ void Iso15693InitReader() {
LED_C_OFF();
LED_D_OFF();

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Setup SSC
// FpgaSetupSsc();

@@ -1015,6 +1018,7 @@ void ReaderIso15693(uint32_t parameter)
// Blank arrays
memset(BigBuf + 3660, 0, 300);

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Setup SSC
FpgaSetupSsc();

@@ -1165,6 +1169,7 @@ void SimTagIso15693(uint32_t parameter)
// Blank arrays
memset(answer1, 0, 100);

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Setup SSC
FpgaSetupSsc();

@@ -21,7 +21,8 @@ ENTRY(Vector)
SECTIONS
{
.fpgaimage : {
*(fpga_bit.data)
*(fpga_lf_bit.data)
*(fpga_hf_bit.data)
} >fpgaimage :fpgaimage

.start : {
@@ -310,6 +310,7 @@ static uint32_t perform_setup_phase_rwd(int iv)
}

static void LegicCommonInit(void) {
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
FpgaSetupSsc();
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);
@@ -687,6 +688,7 @@ void LegicRfSimulate(int phase, int frame, int reqresp)
legic_frame_drift = frame;
legic_reqresp_drift = reqresp;

FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
FpgaSetupSsc();
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_212K);
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