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Remove bit swapping in Xilinx Spartan bitfile loading

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This patch removes the unnecessary bit swapping when
booting .bit files with the 'fpga loadb' command.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
This commit is contained in:
Matthias Fuchs 2007-12-27 17:13:11 +01:00 committed by Wolfgang Denk
parent 437fc7327f
commit c26acc1a43
1 changed files with 1 additions and 36 deletions
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37
common/cmd_fpga.c
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@ -60,12 +60,9 @@ int fpga_loadbitstream(unsigned long dev, char* fpgadata, size_t size)
{
#if defined(CONFIG_FPGA_XILINX)
unsigned int length;
unsigned char* swapdata;
unsigned int swapsize;
char buffer[80];
unsigned char *ptr;
unsigned char *dataptr;
unsigned char data;
unsigned int i;
int rc;
@ -143,39 +140,7 @@ int fpga_loadbitstream(unsigned long dev, char* fpgadata, size_t size)
dataptr+=4;
printf(" bytes in bitstream = %d\n", swapsize);
/* check consistency of length obtained */
if (swapsize >= size) {
printf("%s: Could not find right length of data in bitstream\n",
__FUNCTION__);
return FPGA_FAIL;
}
/* allocate memory */
swapdata = (unsigned char *)malloc(swapsize);
if (swapdata == NULL) {
printf("%s: Could not allocate %d bytes memory !\n",
__FUNCTION__, swapsize);
return FPGA_FAIL;
}
/* read data into memory and swap bits */
ptr = swapdata;
for (i = 0; i < swapsize; i++) {
data = 0x00;
data |= (*dataptr & 0x01) << 7;
data |= (*dataptr & 0x02) << 5;
data |= (*dataptr & 0x04) << 3;
data |= (*dataptr & 0x08) << 1;
data |= (*dataptr & 0x10) >> 1;
data |= (*dataptr & 0x20) >> 3;
data |= (*dataptr & 0x40) >> 5;
data |= (*dataptr & 0x80) >> 7;
*ptr++ = data;
dataptr++;
}
rc = fpga_load(dev, swapdata, swapsize);
free(swapdata);
rc = fpga_load(dev, dataptr, swapsize);
return rc;
#else
printf("Bitstream support only for Xilinx devices\n");