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authorRodolfo Giometti <giometti@linux.it>2008-11-12 13:27:12 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-11-12 17:17:18 -0800
commit4e17e1db96474af5620e3259754df4cb1c46521c (patch)
treecc662ebf5158b407495a4939b0ea3d16b93a1b7e /include
parente0a29382c6f51c278a7e9a788917ff9182f3dba6 (diff)
downloadlinux-4e17e1db96474af5620e3259754df4cb1c46521c.tar.bz2
Add c2 port support
C2port implements a two wire serial communication protocol (bit banging) designed to enable in-system programming, debugging, and boundary-scan testing on low pin-count Silicon Labs devices. Currently this code supports only flash programming through sysfs interface but extensions shoud be easy to add. Signed-off-by: Rodolfo Giometti <giometti@linux.it> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/c2port.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/include/linux/c2port.h b/include/linux/c2port.h
new file mode 100644
index 000000000000..7b5a2388ba67
--- /dev/null
+++ b/include/linux/c2port.h
@@ -0,0 +1,65 @@
+/*
+ * 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/device.h>
+
+#define C2PORT_NAME_LEN 32
+
+/*
+ * C2 port basic structs
+ */
+
+/* Main struct */
+struct c2port_ops;
+struct c2port_device {
+ unsigned int access:1;
+ unsigned int flash_access:1;
+
+ 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
+ */
+
+#define to_class_dev(obj) container_of((obj), struct class_device, kobj)
+#define to_c2port_device(obj) container_of((obj), struct c2port_device, class)
+
+extern struct c2port_device *c2port_device_register(char *name,
+ struct c2port_ops *ops, void *devdata);
+extern void c2port_device_unregister(struct c2port_device *dev);