Merge branch 'docs-next' of git://git.lwn.net/linux-2.6
[linux-2.6/next.git] / include / linux / c2port.h
blob2a5cd867c365c3fd4e7f776ceb7e6d42d4e255f9
1 /*
2 * Silicon Labs C2 port Linux support
4 * Copyright (c) 2007 Rodolfo Giometti <giometti@linux.it>
5 * Copyright (c) 2007 Eurotech S.p.A. <info@eurotech.it>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation
12 #include <linux/device.h>
13 #include <linux/kmemcheck.h>
15 #define C2PORT_NAME_LEN 32
18 * C2 port basic structs
21 /* Main struct */
22 struct c2port_ops;
23 struct c2port_device {
24 kmemcheck_bitfield_begin(flags);
25 unsigned int access:1;
26 unsigned int flash_access:1;
27 kmemcheck_bitfield_end(flags);
29 int id;
30 char name[C2PORT_NAME_LEN];
31 struct c2port_ops *ops;
32 struct mutex mutex; /* prevent races during read/write */
34 struct device *dev;
36 void *private_data;
39 /* Basic operations */
40 struct c2port_ops {
41 /* Flash layout */
42 unsigned short block_size; /* flash block size in bytes */
43 unsigned short blocks_num; /* flash blocks number */
45 /* Enable or disable the access to C2 port */
46 void (*access)(struct c2port_device *dev, int status);
48 /* Set C2D data line as input/output */
49 void (*c2d_dir)(struct c2port_device *dev, int dir);
51 /* Read/write C2D data line */
52 int (*c2d_get)(struct c2port_device *dev);
53 void (*c2d_set)(struct c2port_device *dev, int status);
55 /* Write C2CK clock line */
56 void (*c2ck_set)(struct c2port_device *dev, int status);
60 * Exported functions
63 #define to_class_dev(obj) container_of((obj), struct class_device, kobj)
64 #define to_c2port_device(obj) container_of((obj), struct c2port_device, class)
66 extern struct c2port_device *c2port_device_register(char *name,
67 struct c2port_ops *ops, void *devdata);
68 extern void c2port_device_unregister(struct c2port_device *dev);