1 files changed, 89 insertions, 0 deletions
diff --git a/arch/sparc/prom/devops.c b/arch/sparc/prom/devops.c
new file mode 100644
index 00000000000..61919b54f6c
--- /dev/null
+++ b/arch/sparc/prom/devops.c
@@ -0,0 +1,89 @@
+/* $Id: devops.c,v 1.13 2000/08/26 02:38:03 anton Exp $
+ * devops.c:  Device operations using the PROM.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+
+extern void restore_current(void);
+
+/* Open the device described by the string 'dstr'.  Returns the handle
+ * to that device used for subsequent operations on that device.
+ * Returns -1 on failure.
+ */
+int
+prom_devopen(char *dstr)
+{
+	int handle;
+	unsigned long flags;
+	spin_lock_irqsave(&prom_lock, flags);
+	switch(prom_vers) {
+	case PROM_V0:
+		handle = (*(romvec->pv_v0devops.v0_devopen))(dstr);
+		if(handle == 0) handle = -1;
+		break;
+	case PROM_V2:
+	case PROM_V3:
+		handle = (*(romvec->pv_v2devops.v2_dev_open))(dstr);
+		break;
+	default:
+		handle = -1;
+		break;
+	};
+	restore_current();
+	spin_unlock_irqrestore(&prom_lock, flags);
+
+	return handle;
+}
+
+/* Close the device described by device handle 'dhandle'. */
+int
+prom_devclose(int dhandle)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&prom_lock, flags);
+	switch(prom_vers) {
+	case PROM_V0:
+		(*(romvec->pv_v0devops.v0_devclose))(dhandle);
+		break;
+	case PROM_V2:
+	case PROM_V3:
+		(*(romvec->pv_v2devops.v2_dev_close))(dhandle);
+		break;
+	default:
+		break;
+	};
+	restore_current();
+	spin_unlock_irqrestore(&prom_lock, flags);
+	return 0;
+}
+
+/* Seek to specified location described by 'seekhi' and 'seeklo'
+ * for device 'dhandle'.
+ */
+void
+prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&prom_lock, flags);
+	switch(prom_vers) {
+	case PROM_V0:
+		(*(romvec->pv_v0devops.v0_seekdev))(dhandle, seekhi, seeklo);
+		break;
+	case PROM_V2:
+	case PROM_V3:
+		(*(romvec->pv_v2devops.v2_dev_seek))(dhandle, seekhi, seeklo);
+		break;
+	default:
+		break;
+	};
+	restore_current();
+	spin_unlock_irqrestore(&prom_lock, flags);
+
+	return;
+}