patch-2.1.129 linux/include/asm-ppc/feature.h

• Lines: 66
• Date: Sun Nov 15 10:51:49 1998
• Orig file: v2.1.128/linux/include/asm-ppc/feature.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.128/linux/include/asm-ppc/feature.h linux/include/asm-ppc/feature.h
@@ -0,0 +1,65 @@
+/*
+ * Definitions for accessing the Feature Control Register (FCR)
+ * on Power Macintoshes and similar machines.  The FCR lets us
+ * enable/disable, reset, and power up/down various peripherals.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1998 Paul Mackerras.
+ */
+#ifndef __ASM_PPC_FEATURE_H
+#define __ASM_PPC_FEATURE_H
+
+/*
+ * The FCR bits for particular features vary somewhat between
+ * different machines.  So we abstract a list of features here
+ * and let the feature_* routines map them to the actual bits.
+ */
+enum system_feature {
+	FEATURE_null,
+	FEATURE_Serial_reset,
+	FEATURE_Serial_enable,
+	FEATURE_Serial_IO_A,
+	FEATURE_Serial_IO_B,
+	FEATURE_SWIM3_enable,
+	FEATURE_MESH_enable,
+	FEATURE_IDE_enable,
+	FEATURE_VIA_enable,
+	FEATURE_CD_power,
+	FEATURE_Mediabay_reset,
+	FEATURE_Mediabay_enable,
+	FEATURE_Mediabay_PCI_enable,
+	FEATURE_Mediabay_IDE_enable,
+	FEATURE_Mediabay_floppy_enable,
+	FEATURE_BMac_reset,
+	FEATURE_BMac_IO_enable,
+	FEATURE_Modem_PowerOn,
+	FEATURE_Modem_Reset,
+	FEATURE_last,
+};
+
+/* Note about the device parameter: Each device gives it's own entry. If NULL,
+   the feature function will just do nothing and return -EINVAL.
+   The feature management will walk up the device tree until in reaches a recognized
+   chip for which features can be changed and it will then apply the necessary
+   features to that chip. If it's not found, -ENODEV is returned.
+   Note also that feature_test/set/clear are interrupt-safe provided that they are
+   called _after_ feature_init() is completed.
+ */
+
+/* Test whether a particular feature is enabled. May return -ENODEV*/
+extern int	feature_test(struct device_node* device, enum system_feature f);
+
+/* Set a particular feature. Returns 0 or -ENODEV */
+extern int	feature_set(struct device_node* device, enum system_feature f);
+
+/* Clear a particular feature */
+extern int	feature_clear(struct device_node* device, enum system_feature f);
+
+/* Initialize feature stuff */
+extern void	feature_init(void);
+
+
+#endif /* __ASM_PPC_FEATURE_H */