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Rodolfo Giometti4e17e1d2008-11-12 13:27:12 -08001/*
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#include <linux/device.h>
Vegard Nossumc53bd2e2009-02-26 14:05:59 +010013#include <linux/kmemcheck.h>
Rodolfo Giometti4e17e1d2008-11-12 13:27:12 -080014
15#define C2PORT_NAME_LEN 32
16
17/*
18 * C2 port basic structs
19 */
20
21/* Main struct */
22struct c2port_ops;
23struct c2port_device {
Vegard Nossumc53bd2e2009-02-26 14:05:59 +010024 kmemcheck_bitfield_begin(flags);
Rodolfo Giometti4e17e1d2008-11-12 13:27:12 -080025 unsigned int access:1;
26 unsigned int flash_access:1;
Vegard Nossumc53bd2e2009-02-26 14:05:59 +010027 kmemcheck_bitfield_end(flags);
Rodolfo Giometti4e17e1d2008-11-12 13:27:12 -080028
29 int id;
30 char name[C2PORT_NAME_LEN];
31 struct c2port_ops *ops;
32 struct mutex mutex; /* prevent races during read/write */
33
34 struct device *dev;
35
36 void *private_data;
37};
38
39/* Basic operations */
40struct c2port_ops {
41 /* Flash layout */
42 unsigned short block_size; /* flash block size in bytes */
43 unsigned short blocks_num; /* flash blocks number */
44
45 /* Enable or disable the access to C2 port */
46 void (*access)(struct c2port_device *dev, int status);
47
48 /* Set C2D data line as input/output */
49 void (*c2d_dir)(struct c2port_device *dev, int dir);
50
51 /* Read/write C2D data line */
52 int (*c2d_get)(struct c2port_device *dev);
53 void (*c2d_set)(struct c2port_device *dev, int status);
54
55 /* Write C2CK clock line */
56 void (*c2ck_set)(struct c2port_device *dev, int status);
57};
58
59/*
60 * Exported functions
61 */
62
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)
65
66extern struct c2port_device *c2port_device_register(char *name,
67 struct c2port_ops *ops, void *devdata);
68extern void c2port_device_unregister(struct c2port_device *dev);