patch-1.3.4 linux/arch/sparc/prom/devops.c

• Lines: 70
• Date: Sat Jun 17 10:03:28 1995
• Orig file: v1.3.3/linux/arch/sparc/prom/devops.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.3/linux/arch/sparc/prom/devops.c linux/arch/sparc/prom/devops.c
@@ -0,0 +1,69 @@
+/* devops.c:  Device operations using the PROM.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+
+/* 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;
+	switch(prom_vers) {
+	case PROM_V0:
+		handle = (*(romvec->pv_v0devops.v0_devopen))(dstr);
+		if(handle == 0) return -1;
+		return handle;
+		break;
+	case PROM_V2:
+	case PROM_V3:
+	case PROM_P1275:
+		handle = (*(romvec->pv_v2devops.v2_dev_open))(dstr);
+		return handle;
+		break;
+	};
+
+	return -1;
+}
+
+/* Close the device described by device handle 'dhandle'. */
+void
+prom_close(int dhandle)
+{
+	switch(prom_vers) {
+	case PROM_V0:
+		(*(romvec->pv_v0devops.v0_devclose))(dhandle);
+		return;
+	case PROM_V2:
+	case PROM_V3:
+	case PROM_P1275:
+		(*(romvec->pv_v2devops.v2_dev_close))(dhandle);
+		return;
+	};
+	return;
+}
+
+/* Seek to specified location described by 'seekhi' and 'seeklo'
+ * for device 'dhandle'.
+ */
+void
+prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo)
+{
+	switch(prom_vers) {
+	case PROM_V0:
+		(*(romvec->pv_v0devops.v0_seekdev))(dhandle, seekhi, seeklo);
+		break;
+	case PROM_V2:
+	case PROM_V3:
+	case PROM_P1275:
+		(*(romvec->pv_v2devops.v2_dev_seek))(dhandle, seekhi, seeklo);
+		break;
+	};
+
+	return;
+}