blob: a2f7d7413f30534f039f902405faaf8be7e4a921 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
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>
#include <linux/kmemcheck.h>
#define C2PORT_NAME_LEN 32
/*
* C2 port basic structs
*/
/* Main struct */
struct c2port_ops;
struct c2port_device {
kmemcheck_bitfield_begin(flags);
unsigned int access:1;
unsigned int flash_access:1;
kmemcheck_bitfield_end(flags);
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
*/
extern struct c2port_device *c2port_device_register(char *name,
struct c2port_ops *ops, void *devdata);
extern void c2port_device_unregister(struct c2port_device *dev);
|
