Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / c2port.h

diff --git a/kernel/include/linux/c2port.h b/kernel/include/linux/c2port.h
new file mode 100644 (file)
index 0000000..4efabcb
--- /dev/null
+++ b/kernel/include/linux/c2port.h
@@ -0,0 +1,66 @@
+/*
+ *  Silicon Labs C2 port Linux support
+ *
+ *  Copyright (c) 2007 Rodolfo Giometti <giometti@linux.it>
+ *  Copyright (c) 2007 Eurotech S.p.A. <info@eurotech.it>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation
+ */
+
+#include <linux/kmemcheck.h>
+
+#define C2PORT_NAME_LEN                        32
+
+struct device;
+
+/*
+ * C2 port basic structs
+ */
+
+/* Main struct */
+struct c2port_ops;
+struct c2port_device {
+       kmemcheck_bitfield_begin(flags);
+       unsigned int access:1;
+       unsigned int flash_access:1;
+       kmemcheck_bitfield_end(flags);
+
+       int id;
+       char name[C2PORT_NAME_LEN];
+       struct c2port_ops *ops;
+       struct mutex mutex;             /* prevent races during read/write */
+
+       struct device *dev;
+
+       void *private_data;
+};
+
+/* Basic operations */
+struct c2port_ops {
+       /* Flash layout */
+       unsigned short block_size;      /* flash block size in bytes */
+       unsigned short blocks_num;      /* flash blocks number */
+
+       /* Enable or disable the access to C2 port */
+       void (*access)(struct c2port_device *dev, int status);
+
+       /* Set C2D data line as input/output */
+       void (*c2d_dir)(struct c2port_device *dev, int dir);
+
+       /* Read/write C2D data line */
+       int (*c2d_get)(struct c2port_device *dev);
+       void (*c2d_set)(struct c2port_device *dev, int status);
+
+       /* Write C2CK clock line */
+       void (*c2ck_set)(struct c2port_device *dev, int status);
+};
+
+/*
+ * Exported functions
+ */
+
+extern struct c2port_device *c2port_device_register(char *name,
+                                       struct c2port_ops *ops, void *devdata);
+extern void c2port_device_unregister(struct c2port_device *dev);