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author | Rodolfo Giometti <giometti@linux.it> | 2008-11-12 13:27:12 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-12 17:17:18 -0800 |
commit | 4e17e1db96474af5620e3259754df4cb1c46521c (patch) | |
tree | cc662ebf5158b407495a4939b0ea3d16b93a1b7e /include | |
parent | e0a29382c6f51c278a7e9a788917ff9182f3dba6 (diff) | |
download | linux-stable-4e17e1db96474af5620e3259754df4cb1c46521c.tar.gz linux-stable-4e17e1db96474af5620e3259754df4cb1c46521c.tar.bz2 linux-stable-4e17e1db96474af5620e3259754df4cb1c46521c.zip |
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.h | 65 |
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); |