CHG: the AT91C_BASE_PMC->PMC_PCER has a tendecy to be clear when set with "=", ...

[proxmark3-svn] / armsrc / fpgaloader.c

diff --git a/armsrc/fpgaloader.c b/armsrc/fpgaloader.c
index 7bcee1eb677300c0e1511cdc4c253e92b9497fb7..a1011ab7c3fccf635520eb8f1ae6cfbb27ff8f12 100644 (file)
--- a/armsrc/fpgaloader.c
+++ b/armsrc/fpgaloader.c
@@ -117,8 +117,7 @@ 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.
 //-----------------------------------------------------------------------------
-void FpgaSetupSsc(void)
-{
+void FpgaSetupSscExt(uint8_t clearPCER) {
        // First configure the GPIOs, and get ourselves a clock.
        AT91C_BASE_PIOA->PIO_ASR =
                GPIO_SSC_FRAME  |
@@ -127,7 +126,10 @@ void FpgaSetupSsc(void)
                GPIO_SSC_CLK;
        AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DOUT;
 
-       AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_SSC);
+       if ( clearPCER )
+               AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_SSC);
+       else
+               AT91C_BASE_PMC->PMC_PCER |= (1 << AT91C_ID_SSC);
 
        // Now set up the SSC proper, starting from a known state.
        AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
@@ -149,26 +151,24 @@ void FpgaSetupSsc(void)
 
        AT91C_BASE_SSC->SSC_CR = AT91C_SSC_RXEN | AT91C_SSC_TXEN;
 }
-
+void FpgaSetupSsc(void) {
+       FpgaSetupSscExt(TRUE);
+}
 //-----------------------------------------------------------------------------
 // Set up DMA to receive samples from the FPGA. We will use the PDC, with
 // a single buffer as a circular buffer (so that we just chain back to
 // 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)
-{
-       if (buf == NULL) {
-        return false;
-    }
-
+bool FpgaSetupSscDma(uint8_t *buf, int len) {
+       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_RXTEN;         // go!    
     return true;
 }
 
@@ -184,15 +184,15 @@ static int get_from_fpga_combined_stream(z_streamp compressed_fpga_stream, uint8
                compressed_fpga_stream->avail_out = OUTPUT_BUFFER_LEN;
                fpga_image_ptr = output_buffer;
                int res = inflate(compressed_fpga_stream, Z_SYNC_FLUSH);
-               if (res != Z_OK) {
+
+               if (res != Z_OK)
                        Dbprintf("inflate returned: %d, %s", res, compressed_fpga_stream->msg);
-               }
-               if (res < 0) {
+
+               if (res < 0)
                        return res;
-               }
        }
 
-       uncompressed_bytes_cnt++;
+       ++uncompressed_bytes_cnt;
        
        return *fpga_image_ptr++;
 }
@@ -209,8 +209,7 @@ static int get_from_fpga_stream(int bitstream_version, z_streamp compressed_fpga
                get_from_fpga_combined_stream(compressed_fpga_stream, output_buffer);
        }
 
-       return get_from_fpga_combined_stream(compressed_fpga_stream, output_buffer);
-       
+       return get_from_fpga_combined_stream(compressed_fpga_stream, output_buffer);    
 }
 
 
@@ -222,7 +221,8 @@ static voidpf fpga_inflate_malloc(voidpf opaque, uInt items, uInt size)
 
 static void fpga_inflate_free(voidpf opaque, voidpf address)
 {
-       BigBuf_free();
+       // free eventually allocated BigBuf memory
+       BigBuf_free(); BigBuf_Clear_ext(false);
 }
 
 
@@ -247,16 +247,14 @@ static bool reset_fpga_stream(int bitstream_version, z_streamp compressed_fpga_s
 
        fpga_image_ptr = output_buffer;
 
-       for (uint16_t i = 0; i < FPGA_BITSTREAM_FIXED_HEADER_SIZE; i++) {
+       for (uint16_t i = 0; i < FPGA_BITSTREAM_FIXED_HEADER_SIZE; i++)
                header[i] = get_from_fpga_stream(bitstream_version, compressed_fpga_stream, output_buffer);
-       }
        
        // Check for a valid .bit file (starts with _bitparse_fixed_header)
-       if(memcmp(_bitparse_fixed_header, header, FPGA_BITSTREAM_FIXED_HEADER_SIZE) == 0) {
+       if(memcmp(_bitparse_fixed_header, header, FPGA_BITSTREAM_FIXED_HEADER_SIZE) == 0)
                return true;
-       } else {
-               return false;
-       }
+
+       return false;
 }
 
 
@@ -413,14 +411,14 @@ static int bitparse_find_section(int bitstream_version, char section_name, unsig
 void FpgaDownloadAndGo(int bitstream_version)
 {
        z_stream compressed_fpga_stream;
-       uint8_t output_buffer[OUTPUT_BUFFER_LEN];
+       uint8_t output_buffer[OUTPUT_BUFFER_LEN] = {0x00};
        
        // check whether or not the bitstream is already loaded
        if (downloaded_bitstream == bitstream_version)
                return;
 
        // make sure that we have enough memory to decompress
-       BigBuf_free();
+       BigBuf_free(); BigBuf_Clear_ext(false);
        
        if (!reset_fpga_stream(bitstream_version, &compressed_fpga_stream, output_buffer)) {
                return;
@@ -434,7 +432,8 @@ void FpgaDownloadAndGo(int bitstream_version)
 
        inflateEnd(&compressed_fpga_stream);
        
-       BigBuf_free();
+       // free eventually allocated BigBuf memory
+       BigBuf_free(); BigBuf_Clear_ext(false);
 }      
 
 
@@ -447,18 +446,17 @@ void FpgaDownloadAndGo(int bitstream_version)
 void FpgaGatherVersion(int bitstream_version, char *dst, int len)
 {
        unsigned int fpga_info_len;
-       char tempstr[40];
+       char tempstr[40] = {0x00};
        z_stream compressed_fpga_stream;
-       uint8_t output_buffer[OUTPUT_BUFFER_LEN];
+       uint8_t output_buffer[OUTPUT_BUFFER_LEN] = {0x00};
        
        dst[0] = '\0';
 
        // ensure that we can allocate enough memory for decompression:
-       BigBuf_free();
+       BigBuf_free(); BigBuf_Clear_ext(false);
 
-       if (!reset_fpga_stream(bitstream_version, &compressed_fpga_stream, output_buffer)) {
+       if (!reset_fpga_stream(bitstream_version, &compressed_fpga_stream, output_buffer))
                return;
-       }
 
        if(bitparse_find_section(bitstream_version, 'a', &fpga_info_len, &compressed_fpga_stream, output_buffer)) {
                for (uint16_t i = 0; i < fpga_info_len; i++) {