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fomu-flash: add -l (rom) option to load a rom

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This can be used to quickly develop a bootloader, or other boot
rom for an ICE40.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-02-25 13:51:27 +08:00
parent 4ca2218403
commit bcbc7319c1
1 changed files with 52 additions and 19 deletions
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71
fomu-flash.c
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@ -10,6 +10,7 @@
#include "rpi.h"
#include "spi.h"
#include "fpga.h"
#include "ice40.h"
#define S_MOSI 10
#define S_MISO 9
@ -24,6 +25,15 @@
static unsigned int F_RESET = 27;
#define F_DONE 17
static int spi_irw_readb(void *data) {
return spiRx(data);
}
static int spi_irw_writeb(void *data, uint8_t b) {
spiTx(data, b);
return b;
}
static inline int isprint(int c)
{
return c > 32 && c < 127;
@ -120,7 +130,8 @@ static int print_program_modes(FILE *stream) {
fprintf(stream, " -r Reset the FPGA and have it boot from SPI\n");
fprintf(stream, " -i Print out the SPI ID code\n");
fprintf(stream, " -p offset Peek at 256 bytes of SPI flash at the specified offset\n");
fprintf(stream, " -f bin Load this binary directly into the FPGA\n");
fprintf(stream, " -f bin Load this bitstream directly into the FPGA\n");
fprintf(stream, " -l rom Replace the ROM in the bitstream with this file\n");
fprintf(stream, " -w bin Write this binary into the SPI flash chip\n");
fprintf(stream, " -v bin Verify the SPI flash contains this data\n");
fprintf(stream, " -s out Save the SPI flash contents to this file\n");
@ -131,10 +142,13 @@ static int print_program_modes(FILE *stream) {
static int print_help(FILE *stream, const char *progname) {
fprintf(stream, "Fomu Raspberry Pi Flash Utilities\n");
fprintf(stream, "Usage:\n");
fprintf(stream, "%15s (-[hri] | [-p offset] | [-f bin] | [-w bin] | [-v bin] | [-s out] | [-k n[:f]])\n", progname);
fprintf(stream, "%15s (-[hri] | [-p offset] | [-f bitstream] | \n", progname);
fprintf(stream, "%15s [-w bin] | [-v bin] | [-s out] | [-k n[:f]])\n", "");
fprintf(stream, " [-g pinspec] [-t spitype] [-b bytes]\n");
fprintf(stream, "\n");
fprintf(stream, "Program mode (pick one):\n");
print_program_modes(stream);
fprintf(stream, "\n");
fprintf(stream, "Configuration options:\n");
fprintf(stream, " -g ps Set the pin assignment with the given pinspec\n");
fprintf(stream, " -t type Set the number of bits to use for SPI (1, 2, 4, or Q)\n");
@ -169,6 +183,7 @@ int main(int argc, char **argv) {
uint8_t security_val[256];
enum op op = OP_UNKNOWN;
enum spi_type spi_type = ST_SINGLE;
struct irw_file *replacement_rom = NULL;
if (gpioInitialise() < 0) {
fprintf(stderr, "Unable to initialize GPIO\n");
@ -199,7 +214,7 @@ int main(int argc, char **argv) {
fpgaSetPin(fpga, FP_DONE, F_DONE);
fpgaSetPin(fpga, FP_CS, S_CE0);
while ((opt = getopt(argc, argv, "hip:rf:b:w:s:2:3:v:g:t:k:")) != -1) {
while ((opt = getopt(argc, argv, "hip:rf:b:w:s:2:3:v:g:t:k:l:")) != -1) {
switch (opt) {
case 'r':
@ -212,6 +227,14 @@ int main(int argc, char **argv) {
spi_flash_bytes = strtoul(optarg, NULL, 0);
break;
case 'l':
replacement_rom = irw_open(optarg, "r");
if (!replacement_rom) {
perror("couldn't open replacement rom file");
return 10;
}
break;
case 'k': {
if (op != OP_UNKNOWN)
return print_usage_error(stdout);
@ -478,32 +501,42 @@ offset, file_src[offset], spi_src[offset]);
}
case OP_FPGA_BOOT: {
int count;
spiHold(spi);
spiSwapTxRx(spi);
fpgaResetSlave(fpga);
fprintf(stderr, "FPGA Done? %d\n", fpgaDone(fpga));
int fd = open(op_filename, O_RDONLY);
if (fd == -1) {
perror("unable to open fpga bitstream");
break;
}
spiBegin(spi);
uint8_t bfr[32768];
int count;
while ((count = read(fd, bfr, sizeof(bfr))) > 0) {
int i;
for (i = 0; i < count; i++)
spiTx(spi, bfr[i]);
if (replacement_rom) {
IRW_FILE *bitstream = irw_open(op_filename, "r");
if (!bitstream) {
perror("unable to open fpga bitstream");
break;
}
IRW_FILE *spidev = irw_open_fake(spi, spi_irw_readb, spi_irw_writeb);
ice40_patch(bitstream, replacement_rom, spidev, 8192);
}
if (count < 0) {
perror("unable to read from fpga bitstream file");
break;
else {
uint8_t bfr[32768];
int fd = open(op_filename, O_RDONLY);
if (fd == -1) {
perror("unable to open fpga bitstream");
break;
}
while ((count = read(fd, bfr, sizeof(bfr))) > 0) {
int i;
for (i = 0; i < count; i++)
spiTx(spi, bfr[i]);
}
if (count < 0) {
perror("unable to read from fpga bitstream file");
break;
}
close(fd);
}
close(fd);
for (count = 0; count < 500; count++)
spiTx(spi, 0xff);
fprintf(stderr, "FPGA Done? %d\n", fpgaDone(fpga));