1 files changed, 49 insertions, 0 deletions
diff --git a/kernel/code/gpio.c b/kernel/code/gpio.c
new file mode 100644
index 0000000..549eb81
--- /dev/null
+++ b/kernel/code/gpio.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <errno.h>
+#include <string.h>
+
+#include <sys/ioctl.h>
+#include <linux/cp210x.h>
+
+
+#define  log_ioctl(fd,op,arg) do_ioctl(fd,#op,op,arg)
+
+int
+do_ioctl (int fd, char *sop, int op, void *arg)
+{
+  int ret;
+
+  errno = 0;
+
+  ret = ioctl (fd, op, arg);
+
+  printf ("ioctl(%d,%s(0x%x),%p)=%d  (errno=%d(%s))\n", fd, sop, op, arg, ret,
+          errno, strerror (errno));
+
+  return ret;
+}
+
+int
+main (int argc, char *argv[])
+{
+  struct cp210x_port_config config;
+
+  int fd = open (argv[1], O_RDWR);
+
+  memset (&config, 0, sizeof (config));
+
+  log_ioctl (fd, CPIOC_PORTCONFGET, &config);
+
+  printf ("reset=(%x,%x,%x), suspend=(%x,%x,%x), enhanced_fxn=%x\n",
+          config.reset.mode,
+          config.reset.low_power,
+          config.reset.latch,
+          config.suspend.mode,
+          config.suspend.low_power,
+          config.suspend.latch, config.enhanced_fxn);
+
+
+}