65 lines
1.0 KiB
C
65 lines
1.0 KiB
C
/*
|
|
* JZ47xx GPIO lines
|
|
*
|
|
* Written 2010 by Andres Calderon andres.calderon@emqbit.com
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/mman.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#include <jz47xx_mmap.h>
|
|
|
|
|
|
void *
|
|
jz_mmap (off_t address)
|
|
{
|
|
int fd;
|
|
|
|
void *pio;
|
|
|
|
if ((fd = open ("/dev/mem", O_RDWR | O_SYNC)) == -1)
|
|
{
|
|
fprintf (stderr, "Cannot open /dev/mem.\n");
|
|
return 0;
|
|
}
|
|
|
|
pio = (void *) mmap (0, getpagesize (), PROT_READ | PROT_WRITE, MAP_SHARED, fd, address);
|
|
|
|
if (pio == (void *) -1)
|
|
{
|
|
fprintf (stderr, "Cannot mmap.\n");
|
|
return 0;
|
|
}
|
|
|
|
return pio;
|
|
}
|
|
|
|
void *
|
|
jz_fpga_map (off_t address)
|
|
{
|
|
int fd;
|
|
|
|
void *fpga;
|
|
|
|
if ((fd = open ("/dev/mem", O_RDWR | O_SYNC)) == -1)
|
|
{
|
|
fprintf (stderr, "Cannot open /dev/mem.\n");
|
|
return 0;
|
|
}
|
|
|
|
fpga = (void *) mmap (0, FPGA_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, address);
|
|
|
|
if (fpga == (void *) -1)
|
|
{
|
|
fprintf (stderr, "Cannot mmap.\n");
|
|
return 0;
|
|
}
|
|
|
|
return fpga;
|
|
}
|
|
|