X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/72c4af087f2950bb445ae0c9c439724efe9a0d0e..15c4dc5ace24e6081d1597b011148f156cdd599e:/armsrc/fpgaloader.c diff --git a/armsrc/fpgaloader.c b/armsrc/fpgaloader.c index 04db41b3..8ce07dd3 100644 --- a/armsrc/fpgaloader.c +++ b/armsrc/fpgaloader.c @@ -1,419 +1,419 @@ -//----------------------------------------------------------------------------- -// Routines to load the FPGA image, and then to configure the FPGA's major -// mode once it is configured. -// -// Jonathan Westhues, April 2006 -//----------------------------------------------------------------------------- -#include -#include "apps.h" - -//----------------------------------------------------------------------------- -// Set up the Serial Peripheral Interface as master -// Used to write the FPGA config word -// May also be used to write to other SPI attached devices like an LCD -//----------------------------------------------------------------------------- -void SetupSpi(int mode) -{ - // PA10 -> SPI_NCS2 chip select (LCD) - // PA11 -> SPI_NCS0 chip select (FPGA) - // PA12 -> SPI_MISO Master-In Slave-Out - // PA13 -> SPI_MOSI Master-Out Slave-In - // PA14 -> SPI_SPCK Serial Clock - - // Disable PIO control of the following pins, allows use by the SPI peripheral - AT91C_BASE_PIOA->PIO_PDR = - GPIO_NCS0 | - GPIO_NCS2 | - GPIO_MISO | - GPIO_MOSI | - GPIO_SPCK; - - AT91C_BASE_PIOA->PIO_ASR = - GPIO_NCS0 | - GPIO_MISO | - GPIO_MOSI | - GPIO_SPCK; - - AT91C_BASE_PIOA->PIO_BSR = GPIO_NCS2; - - //enable the SPI Peripheral clock - AT91C_BASE_PMC->PMC_PCER = (1<SPI_CR = AT91C_SPI_SPIEN; - - switch (mode) { - case SPI_FPGA_MODE: - AT91C_BASE_SPI->SPI_MR = - ( 0 << 24) | // Delay between chip selects (take default: 6 MCK periods) - (14 << 16) | // Peripheral Chip Select (selects FPGA SPI_NCS0 or PA11) - ( 0 << 7) | // Local Loopback Disabled - ( 1 << 4) | // Mode Fault Detection disabled - ( 0 << 2) | // Chip selects connected directly to peripheral - ( 0 << 1) | // Fixed Peripheral Select - ( 1 << 0); // Master Mode - AT91C_BASE_SPI->SPI_CSR[0] = - ( 1 << 24) | // Delay between Consecutive Transfers (32 MCK periods) - ( 1 << 16) | // Delay Before SPCK (1 MCK period) - ( 6 << 8) | // Serial Clock Baud Rate (baudrate = MCK/6 = 24Mhz/6 = 4M baud - ( 8 << 4) | // Bits per Transfer (16 bits) - ( 0 << 3) | // Chip Select inactive after transfer - ( 1 << 1) | // Clock Phase data captured on leading edge, changes on following edge - ( 0 << 0); // Clock Polarity inactive state is logic 0 - break; - case SPI_LCD_MODE: - AT91C_BASE_SPI->SPI_MR = - ( 0 << 24) | // Delay between chip selects (take default: 6 MCK periods) - (11 << 16) | // Peripheral Chip Select (selects LCD SPI_NCS2 or PA10) - ( 0 << 7) | // Local Loopback Disabled - ( 1 << 4) | // Mode Fault Detection disabled - ( 0 << 2) | // Chip selects connected directly to peripheral - ( 0 << 1) | // Fixed Peripheral Select - ( 1 << 0); // Master Mode - AT91C_BASE_SPI->SPI_CSR[2] = - ( 1 << 24) | // Delay between Consecutive Transfers (32 MCK periods) - ( 1 << 16) | // Delay Before SPCK (1 MCK period) - ( 6 << 8) | // Serial Clock Baud Rate (baudrate = MCK/6 = 24Mhz/6 = 4M baud - ( 1 << 4) | // Bits per Transfer (9 bits) - ( 0 << 3) | // Chip Select inactive after transfer - ( 1 << 1) | // Clock Phase data captured on leading edge, changes on following edge - ( 0 << 0); // Clock Polarity inactive state is logic 0 - break; - default: // Disable SPI - AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIDIS; - break; - } -} - -//----------------------------------------------------------------------------- -// 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) -{ - // First configure the GPIOs, and get ourselves a clock. - AT91C_BASE_PIOA->PIO_ASR = - GPIO_SSC_FRAME | - GPIO_SSC_DIN | - GPIO_SSC_DOUT | - GPIO_SSC_CLK; - AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DOUT; - - 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; - - // RX clock comes from TX clock, RX starts when TX starts, data changes - // on RX clock rising edge, sampled on falling edge - 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 - // pulse, no output sync, start on positive-going edge of sync - 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, start 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; - - AT91C_BASE_SSC->SSC_CR = AT91C_SSC_RXEN | AT91C_SSC_TXEN; -} - -//----------------------------------------------------------------------------- -// 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. -//----------------------------------------------------------------------------- -void FpgaSetupSscDma(BYTE *buf, int len) -{ - AT91C_BASE_PDC_SSC->PDC_RPR = (DWORD)buf; - AT91C_BASE_PDC_SSC->PDC_RCR = len; - AT91C_BASE_PDC_SSC->PDC_RNPR = (DWORD)buf; - AT91C_BASE_PDC_SSC->PDC_RNCR = len; - AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN; -} - -static void DownloadFPGA_byte(unsigned char w) -{ -#define SEND_BIT(x) { if(w & (1<PIO_OER = GPIO_FPGA_ON; - AT91C_BASE_PIOA->PIO_PER = GPIO_FPGA_ON; - HIGH(GPIO_FPGA_ON); // ensure everything is powered on - - SpinDelay(50); - - LED_D_ON(); - - // These pins are inputs - AT91C_BASE_PIOA->PIO_ODR = - GPIO_FPGA_NINIT | - GPIO_FPGA_DONE; - // PIO controls the following pins - AT91C_BASE_PIOA->PIO_PER = - GPIO_FPGA_NINIT | - GPIO_FPGA_DONE; - // Enable pull-ups - AT91C_BASE_PIOA->PIO_PPUER = - GPIO_FPGA_NINIT | - GPIO_FPGA_DONE; - - // setup initial logic state - HIGH(GPIO_FPGA_NPROGRAM); - LOW(GPIO_FPGA_CCLK); - LOW(GPIO_FPGA_DIN); - // These pins are outputs - AT91C_BASE_PIOA->PIO_OER = - GPIO_FPGA_NPROGRAM | - GPIO_FPGA_CCLK | - GPIO_FPGA_DIN; - - // enter FPGA configuration mode - LOW(GPIO_FPGA_NPROGRAM); - SpinDelay(50); - HIGH(GPIO_FPGA_NPROGRAM); - - i=100000; - // wait for FPGA ready to accept data signal - while ((i) && ( !(AT91C_BASE_PIOA->PIO_PDSR & GPIO_FPGA_NINIT ) ) ) { - i--; - } - - // crude error indicator, leave both red LEDs on and return - if (i==0){ - LED_C_ON(); - LED_D_ON(); - return; - } - - if(bytereversal) { - /* This is only supported for DWORD aligned images */ - if( ((int)FpgaImage % sizeof(DWORD)) == 0 ) { - i=0; - while(FpgaImageLen-->0) - DownloadFPGA_byte(FpgaImage[(i++)^0x3]); - /* Explanation of the magic in the above line: - * i^0x3 inverts the lower two bits of the integer i, counting backwards - * for each 4 byte increment. The generated sequence of (i++)^3 is - * 3 2 1 0 7 6 5 4 11 10 9 8 15 14 13 12 etc. pp. - */ - } - } else { - while(FpgaImageLen-->0) - DownloadFPGA_byte(*FpgaImage++); - } - - // continue to clock FPGA until ready signal goes high - i=100000; - while ( (i--) && ( !(AT91C_BASE_PIOA->PIO_PDSR & GPIO_FPGA_DONE ) ) ) { - HIGH(GPIO_FPGA_CCLK); - LOW(GPIO_FPGA_CCLK); - } - // crude error indicator, leave both red LEDs on and return - if (i==0){ - LED_C_ON(); - LED_D_ON(); - return; - } - LED_D_OFF(); -} - -static char *bitparse_headers_start; -static char *bitparse_bitstream_end; -static int bitparse_initialized; -/* 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 - * (big endian), bytes content. Except for section 'e' which has 4 bytes - * length. - */ -static const char _bitparse_fixed_header[] = {0x00, 0x09, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xf0, 0x00, 0x00, 0x01}; -static int bitparse_init(void * start_address, void *end_address) -{ - bitparse_initialized = 0; - - if(memcmp(_bitparse_fixed_header, start_address, sizeof(_bitparse_fixed_header)) != 0) { - return 0; /* Not matched */ - } else { - bitparse_headers_start= ((char*)start_address) + sizeof(_bitparse_fixed_header); - bitparse_bitstream_end= (char*)end_address; - bitparse_initialized = 1; - return 1; - } -} - -int bitparse_find_section(char section_name, char **section_start, unsigned int *section_length) -{ - char *pos = bitparse_headers_start; - int result = 0; - - if(!bitparse_initialized) return 0; - - while(pos < bitparse_bitstream_end) { - char current_name = *pos++; - unsigned int current_length = 0; - if(current_name < 'a' || current_name > 'e') { - /* Strange section name, abort */ - break; - } - current_length = 0; - switch(current_name) { - case 'e': - /* Four byte length field */ - current_length += (*pos++) << 24; - current_length += (*pos++) << 16; - default: /* Fall through, two byte length field */ - current_length += (*pos++) << 8; - current_length += (*pos++) << 0; - } - - if(current_name != 'e' && current_length > 255) { - /* Maybe a parse error */ - break; - } - - if(current_name == section_name) { - /* Found it */ - *section_start = pos; - *section_length = current_length; - result = 1; - break; - } - - pos += current_length; /* Skip section */ - } - - return result; -} - -//----------------------------------------------------------------------------- -// 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) -{ - /* 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)) { - /* Successfully initialized the .bit parser. Find the 'e' section and - * send its contents to the FPGA. - */ - char *bitstream_start; - unsigned int bitstream_length; - if(bitparse_find_section('e', &bitstream_start, &bitstream_length)) { - DownloadFPGA(bitstream_start, bitstream_length, 0); - - return; /* All done */ - } - } - - /* Fallback for the old flash image format: Check for the magic marker 0xFFFFFFFF - * 0xAA995566 at address 0x102000. This is raw bitstream with a size of 336,768 bits - * = 10,524 DWORDs, stored as DWORDS e.g. little-endian in memory, but each DWORD - * is still to be transmitted in MSBit first order. Set the invert flag to indicate - * that the DownloadFPGA function should invert every 4 byte sequence when doing - * the bytewise download. - */ - if( *(DWORD*)0x102000 == 0xFFFFFFFF && *(DWORD*)0x102004 == 0xAA995566 ) - DownloadFPGA((char*)0x102000, 10524*4, 1); -} - -void FpgaGatherVersion(char *dst, int len) -{ - char *fpga_info; - unsigned int fpga_info_len; - dst[0] = 0; - 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(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); - } -#endif - if(bitparse_find_section('c', &fpga_info, &fpga_info_len) && fpga_info[fpga_info_len-1] == 0 ) { - strncat(dst, " on ", len-1); - strncat(dst, fpga_info, len-1); - } - if(bitparse_find_section('d', &fpga_info, &fpga_info_len) && fpga_info[fpga_info_len-1] == 0 ) { - strncat(dst, " at ", len-1); - strncat(dst, fpga_info, len-1); - } - } -} - -//----------------------------------------------------------------------------- -// Send a 16 bit command/data pair to the FPGA. -// The bit format is: C3 C2 C1 C0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 -// where C is the 4 bit command and D is the 12 bit data -//----------------------------------------------------------------------------- -void FpgaSendCommand(WORD cmd, WORD v) -{ - SetupSpi(SPI_FPGA_MODE); - 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(BYTE v) -{ - FpgaSendCommand(FPGA_CMD_SET_CONFREG, v); -} - -//----------------------------------------------------------------------------- -// 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 -// the samples from the ADC always flow through the FPGA. -//----------------------------------------------------------------------------- -void SetAdcMuxFor(DWORD whichGpio) -{ - AT91C_BASE_PIOA->PIO_OER = - GPIO_MUXSEL_HIPKD | - GPIO_MUXSEL_LOPKD | - GPIO_MUXSEL_LORAW | - GPIO_MUXSEL_HIRAW; - - AT91C_BASE_PIOA->PIO_PER = - GPIO_MUXSEL_HIPKD | - GPIO_MUXSEL_LOPKD | - GPIO_MUXSEL_LORAW | - GPIO_MUXSEL_HIRAW; - - LOW(GPIO_MUXSEL_HIPKD); - LOW(GPIO_MUXSEL_HIRAW); - LOW(GPIO_MUXSEL_LORAW); - LOW(GPIO_MUXSEL_LOPKD); - - HIGH(whichGpio); -} +//----------------------------------------------------------------------------- +// Routines to load the FPGA image, and then to configure the FPGA's major +// mode once it is configured. +// +// Jonathan Westhues, April 2006 +//----------------------------------------------------------------------------- +#include +#include "apps.h" + +//----------------------------------------------------------------------------- +// Set up the Serial Peripheral Interface as master +// Used to write the FPGA config word +// May also be used to write to other SPI attached devices like an LCD +//----------------------------------------------------------------------------- +void SetupSpi(int mode) +{ + // PA10 -> SPI_NCS2 chip select (LCD) + // PA11 -> SPI_NCS0 chip select (FPGA) + // PA12 -> SPI_MISO Master-In Slave-Out + // PA13 -> SPI_MOSI Master-Out Slave-In + // PA14 -> SPI_SPCK Serial Clock + + // Disable PIO control of the following pins, allows use by the SPI peripheral + AT91C_BASE_PIOA->PIO_PDR = + GPIO_NCS0 | + GPIO_NCS2 | + GPIO_MISO | + GPIO_MOSI | + GPIO_SPCK; + + AT91C_BASE_PIOA->PIO_ASR = + GPIO_NCS0 | + GPIO_MISO | + GPIO_MOSI | + GPIO_SPCK; + + AT91C_BASE_PIOA->PIO_BSR = GPIO_NCS2; + + //enable the SPI Peripheral clock + AT91C_BASE_PMC->PMC_PCER = (1<SPI_CR = AT91C_SPI_SPIEN; + + switch (mode) { + case SPI_FPGA_MODE: + AT91C_BASE_SPI->SPI_MR = + ( 0 << 24) | // Delay between chip selects (take default: 6 MCK periods) + (14 << 16) | // Peripheral Chip Select (selects FPGA SPI_NCS0 or PA11) + ( 0 << 7) | // Local Loopback Disabled + ( 1 << 4) | // Mode Fault Detection disabled + ( 0 << 2) | // Chip selects connected directly to peripheral + ( 0 << 1) | // Fixed Peripheral Select + ( 1 << 0); // Master Mode + AT91C_BASE_SPI->SPI_CSR[0] = + ( 1 << 24) | // Delay between Consecutive Transfers (32 MCK periods) + ( 1 << 16) | // Delay Before SPCK (1 MCK period) + ( 6 << 8) | // Serial Clock Baud Rate (baudrate = MCK/6 = 24Mhz/6 = 4M baud + ( 8 << 4) | // Bits per Transfer (16 bits) + ( 0 << 3) | // Chip Select inactive after transfer + ( 1 << 1) | // Clock Phase data captured on leading edge, changes on following edge + ( 0 << 0); // Clock Polarity inactive state is logic 0 + break; + case SPI_LCD_MODE: + AT91C_BASE_SPI->SPI_MR = + ( 0 << 24) | // Delay between chip selects (take default: 6 MCK periods) + (11 << 16) | // Peripheral Chip Select (selects LCD SPI_NCS2 or PA10) + ( 0 << 7) | // Local Loopback Disabled + ( 1 << 4) | // Mode Fault Detection disabled + ( 0 << 2) | // Chip selects connected directly to peripheral + ( 0 << 1) | // Fixed Peripheral Select + ( 1 << 0); // Master Mode + AT91C_BASE_SPI->SPI_CSR[2] = + ( 1 << 24) | // Delay between Consecutive Transfers (32 MCK periods) + ( 1 << 16) | // Delay Before SPCK (1 MCK period) + ( 6 << 8) | // Serial Clock Baud Rate (baudrate = MCK/6 = 24Mhz/6 = 4M baud + ( 1 << 4) | // Bits per Transfer (9 bits) + ( 0 << 3) | // Chip Select inactive after transfer + ( 1 << 1) | // Clock Phase data captured on leading edge, changes on following edge + ( 0 << 0); // Clock Polarity inactive state is logic 0 + break; + default: // Disable SPI + AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIDIS; + break; + } +} + +//----------------------------------------------------------------------------- +// 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) +{ + // First configure the GPIOs, and get ourselves a clock. + AT91C_BASE_PIOA->PIO_ASR = + GPIO_SSC_FRAME | + GPIO_SSC_DIN | + GPIO_SSC_DOUT | + GPIO_SSC_CLK; + AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DOUT; + + 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; + + // RX clock comes from TX clock, RX starts when TX starts, data changes + // on RX clock rising edge, sampled on falling edge + 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 + // pulse, no output sync, start on positive-going edge of sync + 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, start 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; + + AT91C_BASE_SSC->SSC_CR = AT91C_SSC_RXEN | AT91C_SSC_TXEN; +} + +//----------------------------------------------------------------------------- +// 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. +//----------------------------------------------------------------------------- +void FpgaSetupSscDma(BYTE *buf, int len) +{ + AT91C_BASE_PDC_SSC->PDC_RPR = (DWORD)buf; + AT91C_BASE_PDC_SSC->PDC_RCR = len; + AT91C_BASE_PDC_SSC->PDC_RNPR = (DWORD)buf; + AT91C_BASE_PDC_SSC->PDC_RNCR = len; + AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN; +} + +static void DownloadFPGA_byte(unsigned char w) +{ +#define SEND_BIT(x) { if(w & (1<PIO_OER = GPIO_FPGA_ON; + AT91C_BASE_PIOA->PIO_PER = GPIO_FPGA_ON; + HIGH(GPIO_FPGA_ON); // ensure everything is powered on + + SpinDelay(50); + + LED_D_ON(); + + // These pins are inputs + AT91C_BASE_PIOA->PIO_ODR = + GPIO_FPGA_NINIT | + GPIO_FPGA_DONE; + // PIO controls the following pins + AT91C_BASE_PIOA->PIO_PER = + GPIO_FPGA_NINIT | + GPIO_FPGA_DONE; + // Enable pull-ups + AT91C_BASE_PIOA->PIO_PPUER = + GPIO_FPGA_NINIT | + GPIO_FPGA_DONE; + + // setup initial logic state + HIGH(GPIO_FPGA_NPROGRAM); + LOW(GPIO_FPGA_CCLK); + LOW(GPIO_FPGA_DIN); + // These pins are outputs + AT91C_BASE_PIOA->PIO_OER = + GPIO_FPGA_NPROGRAM | + GPIO_FPGA_CCLK | + GPIO_FPGA_DIN; + + // enter FPGA configuration mode + LOW(GPIO_FPGA_NPROGRAM); + SpinDelay(50); + HIGH(GPIO_FPGA_NPROGRAM); + + i=100000; + // wait for FPGA ready to accept data signal + while ((i) && ( !(AT91C_BASE_PIOA->PIO_PDSR & GPIO_FPGA_NINIT ) ) ) { + i--; + } + + // crude error indicator, leave both red LEDs on and return + if (i==0){ + LED_C_ON(); + LED_D_ON(); + return; + } + + if(bytereversal) { + /* This is only supported for DWORD aligned images */ + if( ((int)FpgaImage % sizeof(DWORD)) == 0 ) { + i=0; + while(FpgaImageLen-->0) + DownloadFPGA_byte(FpgaImage[(i++)^0x3]); + /* Explanation of the magic in the above line: + * i^0x3 inverts the lower two bits of the integer i, counting backwards + * for each 4 byte increment. The generated sequence of (i++)^3 is + * 3 2 1 0 7 6 5 4 11 10 9 8 15 14 13 12 etc. pp. + */ + } + } else { + while(FpgaImageLen-->0) + DownloadFPGA_byte(*FpgaImage++); + } + + // continue to clock FPGA until ready signal goes high + i=100000; + while ( (i--) && ( !(AT91C_BASE_PIOA->PIO_PDSR & GPIO_FPGA_DONE ) ) ) { + HIGH(GPIO_FPGA_CCLK); + LOW(GPIO_FPGA_CCLK); + } + // crude error indicator, leave both red LEDs on and return + if (i==0){ + LED_C_ON(); + LED_D_ON(); + return; + } + LED_D_OFF(); +} + +static char *bitparse_headers_start; +static char *bitparse_bitstream_end; +static int bitparse_initialized; +/* 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 + * (big endian), bytes content. Except for section 'e' which has 4 bytes + * length. + */ +static const char _bitparse_fixed_header[] = {0x00, 0x09, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xf0, 0x00, 0x00, 0x01}; +static int bitparse_init(void * start_address, void *end_address) +{ + bitparse_initialized = 0; + + if(memcmp(_bitparse_fixed_header, start_address, sizeof(_bitparse_fixed_header)) != 0) { + return 0; /* Not matched */ + } else { + bitparse_headers_start= ((char*)start_address) + sizeof(_bitparse_fixed_header); + bitparse_bitstream_end= (char*)end_address; + bitparse_initialized = 1; + return 1; + } +} + +int bitparse_find_section(char section_name, char **section_start, unsigned int *section_length) +{ + char *pos = bitparse_headers_start; + int result = 0; + + if(!bitparse_initialized) return 0; + + while(pos < bitparse_bitstream_end) { + char current_name = *pos++; + unsigned int current_length = 0; + if(current_name < 'a' || current_name > 'e') { + /* Strange section name, abort */ + break; + } + current_length = 0; + switch(current_name) { + case 'e': + /* Four byte length field */ + current_length += (*pos++) << 24; + current_length += (*pos++) << 16; + default: /* Fall through, two byte length field */ + current_length += (*pos++) << 8; + current_length += (*pos++) << 0; + } + + if(current_name != 'e' && current_length > 255) { + /* Maybe a parse error */ + break; + } + + if(current_name == section_name) { + /* Found it */ + *section_start = pos; + *section_length = current_length; + result = 1; + break; + } + + pos += current_length; /* Skip section */ + } + + return result; +} + +//----------------------------------------------------------------------------- +// 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) +{ + /* 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)) { + /* Successfully initialized the .bit parser. Find the 'e' section and + * send its contents to the FPGA. + */ + char *bitstream_start; + unsigned int bitstream_length; + if(bitparse_find_section('e', &bitstream_start, &bitstream_length)) { + DownloadFPGA(bitstream_start, bitstream_length, 0); + + return; /* All done */ + } + } + + /* Fallback for the old flash image format: Check for the magic marker 0xFFFFFFFF + * 0xAA995566 at address 0x102000. This is raw bitstream with a size of 336,768 bits + * = 10,524 DWORDs, stored as DWORDS e.g. little-endian in memory, but each DWORD + * is still to be transmitted in MSBit first order. Set the invert flag to indicate + * that the DownloadFPGA function should invert every 4 byte sequence when doing + * the bytewise download. + */ + if( *(DWORD*)0x102000 == 0xFFFFFFFF && *(DWORD*)0x102004 == 0xAA995566 ) + DownloadFPGA((char*)0x102000, 10524*4, 1); +} + +void FpgaGatherVersion(char *dst, int len) +{ + char *fpga_info; + unsigned int fpga_info_len; + dst[0] = 0; + 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(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); + } +#endif + if(bitparse_find_section('c', &fpga_info, &fpga_info_len) && fpga_info[fpga_info_len-1] == 0 ) { + strncat(dst, " on ", len-1); + strncat(dst, fpga_info, len-1); + } + if(bitparse_find_section('d', &fpga_info, &fpga_info_len) && fpga_info[fpga_info_len-1] == 0 ) { + strncat(dst, " at ", len-1); + strncat(dst, fpga_info, len-1); + } + } +} + +//----------------------------------------------------------------------------- +// Send a 16 bit command/data pair to the FPGA. +// The bit format is: C3 C2 C1 C0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 +// where C is the 4 bit command and D is the 12 bit data +//----------------------------------------------------------------------------- +void FpgaSendCommand(WORD cmd, WORD v) +{ + SetupSpi(SPI_FPGA_MODE); + 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(BYTE v) +{ + FpgaSendCommand(FPGA_CMD_SET_CONFREG, v); +} + +//----------------------------------------------------------------------------- +// 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 +// the samples from the ADC always flow through the FPGA. +//----------------------------------------------------------------------------- +void SetAdcMuxFor(DWORD whichGpio) +{ + AT91C_BASE_PIOA->PIO_OER = + GPIO_MUXSEL_HIPKD | + GPIO_MUXSEL_LOPKD | + GPIO_MUXSEL_LORAW | + GPIO_MUXSEL_HIRAW; + + AT91C_BASE_PIOA->PIO_PER = + GPIO_MUXSEL_HIPKD | + GPIO_MUXSEL_LOPKD | + GPIO_MUXSEL_LORAW | + GPIO_MUXSEL_HIRAW; + + LOW(GPIO_MUXSEL_HIPKD); + LOW(GPIO_MUXSEL_HIRAW); + LOW(GPIO_MUXSEL_LORAW); + LOW(GPIO_MUXSEL_LOPKD); + + HIGH(whichGpio); +}