1 files changed, 63 insertions, 0 deletions
diff --git a/contrib/libdha/irq.c b/contrib/libdha/irq.c
new file mode 100644
index 000000000..abccaf74c
--- /dev/null
+++ b/contrib/libdha/irq.c
@@ -0,0 +1,63 @@
+/* HW IRQ support */
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/mman.h> /* mlock */
+#include <pthread.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include "libdha.h"
+#include "kernelhelper/dhahelper.h"
+
+
+static int libdha_fd=-1;
+static int hwirq_locks=0;
+
+int	hwirq_install(int bus, int dev, int func,
+		      int ar, u_long ao, uint32_t ad)
+{
+  int retval;
+  if( libdha_fd == -1) libdha_fd = open("/dev/dhahelper",O_RDWR);
+  hwirq_locks++;
+  if (libdha_fd > 0)
+  {
+	dhahelper_irq_t _irq;
+	_irq.bus = bus;
+	_irq.dev = dev;
+	_irq.func = func;
+	_irq.ack_region = ar;
+	_irq.ack_offset = ao;
+	_irq.ack_data = ad;
+	retval = ioctl(libdha_fd, DHAHELPER_INSTALL_IRQ, &_irq);
+	return retval;
+  }
+  return errno;
+}
+
+int	hwirq_wait(unsigned irqnum)
+{
+  int retval;
+  if (libdha_fd > 0)
+  {
+	dhahelper_irq_t _irq;
+	_irq.num = irqnum;
+	retval = ioctl(libdha_fd, DHAHELPER_ACK_IRQ, &_irq);
+	return retval;
+  }
+  return EINVAL;
+}
+
+int	hwirq_uninstall(int bus, int dev, int func)
+{
+  if (libdha_fd > 0)
+  {
+	dhahelper_irq_t _irq;
+	_irq.bus = bus;
+	_irq.dev = dev;
+	_irq.func = func;
+	ioctl(libdha_fd, DHAHELPER_FREE_IRQ, &_irq);
+  }
+  if(!hwirq_locks) { close(libdha_fd); libdha_fd=-1; }
+  return 0;
+}