1/*
2 * Silicon Labs C2 port Linux support
3 *
4 * Copyright (c) 2007 Rodolfo Giometti <giometti@linux.it>
5 * Copyright (c) 2007 Eurotech S.p.A. <info@eurotech.it>
6 *
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
10 */
11
12#define C2PORT_NAME_LEN 32
13
14struct device;
15
16/*
17 * C2 port basic structs
18 */
19
20/* Main struct */
21struct c2port_ops;
22struct c2port_device {
23 unsigned int access:1;
24 unsigned int flash_access:1;
25
26 int id;
27 char name[C2PORT_NAME_LEN];
28 struct c2port_ops *ops;
29 struct mutex mutex; /* prevent races during read/write */
30
31 struct device *dev;
32
33 void *private_data;
34};
35
36/* Basic operations */
37struct c2port_ops {
38 /* Flash layout */
39 unsigned short block_size; /* flash block size in bytes */
40 unsigned short blocks_num; /* flash blocks number */
41
42 /* Enable or disable the access to C2 port */
43 void (*access)(struct c2port_device *dev, int status);
44
45 /* Set C2D data line as input/output */
46 void (*c2d_dir)(struct c2port_device *dev, int dir);
47
48 /* Read/write C2D data line */
49 int (*c2d_get)(struct c2port_device *dev);
50 void (*c2d_set)(struct c2port_device *dev, int status);
51
52 /* Write C2CK clock line */
53 void (*c2ck_set)(struct c2port_device *dev, int status);
54};
55
56/*
57 * Exported functions
58 */
59
60extern struct c2port_device *c2port_device_register(char *name,
61 struct c2port_ops *ops, void *devdata);
62extern void c2port_device_unregister(struct c2port_device *dev);
63