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-rw-r--r--drivers/fpga/fpga.c9
-rw-r--r--drivers/fpga/xilinx.c86
2 files changed, 95 insertions, 0 deletions
diff --git a/drivers/fpga/fpga.c b/drivers/fpga/fpga.c
index 43bdf4f..f0253bf 100644
--- a/drivers/fpga/fpga.c
+++ b/drivers/fpga/fpga.c
@@ -188,6 +188,15 @@ int fpga_add(fpga_type devtype, void *desc)
}
/*
+ * Convert bitstream data and load into the fpga
+ */
+int __weak fpga_loadbitstream(unsigned long dev, char *fpgadata, size_t size)
+{
+ printf("Bitstream support not implemented for this FPGA device\n");
+ return FPGA_FAIL;
+}
+
+/*
* Generic multiplexing code
*/
int fpga_load(int devnum, const void *buf, size_t bsize)
diff --git a/drivers/fpga/xilinx.c b/drivers/fpga/xilinx.c
index 32787b2..7d0342a 100644
--- a/drivers/fpga/xilinx.c
+++ b/drivers/fpga/xilinx.c
@@ -48,6 +48,92 @@ static int xilinx_validate (Xilinx_desc * desc, char *fn);
/* ------------------------------------------------------------------------- */
+int fpga_loadbitstream(unsigned long dev, char *fpgadata, size_t size)
+{
+ unsigned int length;
+ unsigned int swapsize;
+ char buffer[80];
+ unsigned char *dataptr;
+ unsigned int i;
+
+ dataptr = (unsigned char *)fpgadata;
+
+ /* skip the first bytes of the bitsteam, their meaning is unknown */
+ length = (*dataptr << 8) + *(dataptr + 1);
+ dataptr += 2;
+ dataptr += length;
+
+ /* get design name (identifier, length, string) */
+ length = (*dataptr << 8) + *(dataptr + 1);
+ dataptr += 2;
+ if (*dataptr++ != 0x61) {
+ debug("%s: Design name id not recognized in bitstream\n",
+ __func__);
+ return FPGA_FAIL;
+ }
+
+ length = (*dataptr << 8) + *(dataptr + 1);
+ dataptr += 2;
+ for (i = 0; i < length; i++)
+ buffer[i] = *dataptr++;
+
+ printf(" design filename = \"%s\"\n", buffer);
+
+ /* get part number (identifier, length, string) */
+ if (*dataptr++ != 0x62) {
+ printf("%s: Part number id not recognized in bitstream\n",
+ __func__);
+ return FPGA_FAIL;
+ }
+
+ length = (*dataptr << 8) + *(dataptr + 1);
+ dataptr += 2;
+ for (i = 0; i < length; i++)
+ buffer[i] = *dataptr++;
+ printf(" part number = \"%s\"\n", buffer);
+
+ /* get date (identifier, length, string) */
+ if (*dataptr++ != 0x63) {
+ printf("%s: Date identifier not recognized in bitstream\n",
+ __func__);
+ return FPGA_FAIL;
+ }
+
+ length = (*dataptr << 8) + *(dataptr+1);
+ dataptr += 2;
+ for (i = 0; i < length; i++)
+ buffer[i] = *dataptr++;
+ printf(" date = \"%s\"\n", buffer);
+
+ /* get time (identifier, length, string) */
+ if (*dataptr++ != 0x64) {
+ printf("%s: Time identifier not recognized in bitstream\n",
+ __func__);
+ return FPGA_FAIL;
+ }
+
+ length = (*dataptr << 8) + *(dataptr+1);
+ dataptr += 2;
+ for (i = 0; i < length; i++)
+ buffer[i] = *dataptr++;
+ printf(" time = \"%s\"\n", buffer);
+
+ /* get fpga data length (identifier, length) */
+ if (*dataptr++ != 0x65) {
+ printf("%s: Data length id not recognized in bitstream\n",
+ __func__);
+ return FPGA_FAIL;
+ }
+ swapsize = ((unsigned int) *dataptr << 24) +
+ ((unsigned int) *(dataptr + 1) << 16) +
+ ((unsigned int) *(dataptr + 2) << 8) +
+ ((unsigned int) *(dataptr + 3));
+ dataptr += 4;
+ printf(" bytes in bitstream = %d\n", swapsize);
+
+ return fpga_load(dev, dataptr, swapsize);
+}
+
int xilinx_load(Xilinx_desc *desc, const void *buf, size_t bsize)
{
int ret_val = FPGA_FAIL; /* assume a failure */