X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/472345daee388f8d6786ead2f04b4ae0ff0462d4..5ea2a24839c71ba6e58af937a392a6204b8b4696:/armsrc/fpgaloader.c

diff --git a/armsrc/fpgaloader.c b/armsrc/fpgaloader.c
index 77223bd0..214f4843 100644
--- a/armsrc/fpgaloader.c
+++ b/armsrc/fpgaloader.c
@@ -112,10 +112,10 @@ void SetupSpi(int mode)
 }
 
 //-----------------------------------------------------------------------------
-// Set up the synchronous serial port, with the one set of options that we
-// always use when we are talking to the FPGA. Both RX and TX are enabled.
+// Set up the synchronous serial port with the set of options that fits
+// the FPGA mode. Both RX and TX are always enabled.
 //-----------------------------------------------------------------------------
-void FpgaSetupSsc(void)
+void FpgaSetupSsc(uint8_t FPGA_mode)
 {
 	// First configure the GPIOs, and get ourselves a clock.
 	AT91C_BASE_PIOA->PIO_ASR =
@@ -130,17 +130,21 @@ void FpgaSetupSsc(void)
 	// Now set up the SSC proper, starting from a known state.
 	AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
 
-	// RX clock comes from TX clock, RX starts when TX starts, data changes
-	// on RX clock rising edge, sampled on falling edge
+	// RX clock comes from TX clock, RX starts on Transmit Start,
+	// data and frame signal is sampled on falling edge of RK
 	AT91C_BASE_SSC->SSC_RCMR = SSC_CLOCK_MODE_SELECT(1) | SSC_CLOCK_MODE_START(1);
 
-	// 8 bits per transfer, no loopback, MSB first, 1 transfer per sync
+	// 8, 16 or 32 bits per transfer, no loopback, MSB first, 1 transfer per sync
 	// pulse, no output sync
-	AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(8) |	AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
+	if ((FPGA_mode & 0xe0) == FPGA_MAJOR_MODE_HF_READER) {
+		AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(16) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
+	} else {
+		AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(8) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
+	}		
 
-	// clock comes from TK pin, no clock output, outputs change on falling
-	// edge of TK, sample on rising edge of TK, start on positive-going edge of sync
-	AT91C_BASE_SSC->SSC_TCMR = SSC_CLOCK_MODE_SELECT(2) |	SSC_CLOCK_MODE_START(5);
+	// TX clock comes from TK pin, no clock output, outputs change on falling
+	// edge of TK, frame sync is sampled on rising edge of TK, start TX on rising edge of TF
+	AT91C_BASE_SSC->SSC_TCMR = SSC_CLOCK_MODE_SELECT(2) | SSC_CLOCK_MODE_START(5);
 
 	// tx framing is the same as the rx framing
 	AT91C_BASE_SSC->SSC_TFMR = AT91C_BASE_SSC->SSC_RFMR;
@@ -154,17 +158,16 @@ void FpgaSetupSsc(void)
 // ourselves, not to another buffer). The stuff to manipulate those buffers
 // is in apps.h, because it should be inlined, for speed.
 //-----------------------------------------------------------------------------
-bool FpgaSetupSscDma(uint8_t *buf, int len)
+bool FpgaSetupSscDma(uint8_t *buf, uint16_t sample_count)
 {
 	if (buf == NULL) return false;
 
-	AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;	// Disable DMA Transfer
-	AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) buf;		// transfer to this memory address
-	AT91C_BASE_PDC_SSC->PDC_RCR = len;					// transfer this many bytes
-	AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) buf;		// next transfer to same memory address
-	AT91C_BASE_PDC_SSC->PDC_RNCR = len;					// ... with same number of bytes
-	AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN;		// go!
-
+	AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;        // Disable DMA Transfer
+	AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) buf;           // transfer to this memory address
+	AT91C_BASE_PDC_SSC->PDC_RCR = sample_count;             // transfer this many samples
+	AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) buf;          // next transfer to same memory address
+	AT91C_BASE_PDC_SSC->PDC_RNCR = sample_count;            // ... with same number of samples
+	AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN;         // go!
 	return true;
 }
 
@@ -414,8 +417,10 @@ void FpgaDownloadAndGo(int bitstream_version)
 	uint8_t output_buffer[OUTPUT_BUFFER_LEN] = {0x00};
 	
 	// check whether or not the bitstream is already loaded
-	if (downloaded_bitstream == bitstream_version)
+	if (downloaded_bitstream == bitstream_version) {
+		FpgaEnableTracing();
 		return;
+	}
 
 	// make sure that we have enough memory to decompress
 	BigBuf_free(); BigBuf_Clear_ext(false);	
@@ -451,16 +456,30 @@ void FpgaSendCommand(uint16_t cmd, uint16_t v)
 	while ((AT91C_BASE_SPI->SPI_SR & AT91C_SPI_TXEMPTY) == 0);		// wait for the transfer to complete
 	AT91C_BASE_SPI->SPI_TDR = AT91C_SPI_LASTXFER | cmd | v;		// send the data
 }
+
 //-----------------------------------------------------------------------------
 // Write the FPGA setup word (that determines what mode the logic is in, read
 // vs. clone vs. etc.). This is now a special case of FpgaSendCommand() to
 // avoid changing this function's occurence everywhere in the source code.
 //-----------------------------------------------------------------------------
-void FpgaWriteConfWord(uint8_t v)
+void FpgaWriteConfWord(uint16_t v)
 {
 	FpgaSendCommand(FPGA_CMD_SET_CONFREG, v);
 }
 
+//-----------------------------------------------------------------------------
+// enable/disable FPGA internal tracing
+//-----------------------------------------------------------------------------
+void FpgaEnableTracing(void)
+{
+	FpgaSendCommand(FPGA_CMD_TRACE_ENABLE, 1);
+}
+
+void FpgaDisableTracing(void)
+{
+	FpgaSendCommand(FPGA_CMD_TRACE_ENABLE, 0);
+}
+
 //-----------------------------------------------------------------------------
 // Set up the CMOS switches that mux the ADC: four switches, independently
 // closable, but should only close one at a time. Not an FPGA thing, but