]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/linux/c2port.h
8021q: fix a potential memory leak
[mirror_ubuntu-bionic-kernel.git] / include / linux / c2port.h
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 #include <linux/kmemcheck.h>
13
14 #define C2PORT_NAME_LEN 32
15
16 struct device;
17
18 /*
19 * C2 port basic structs
20 */
21
22 /* Main struct */
23 struct c2port_ops;
24 struct c2port_device {
25 kmemcheck_bitfield_begin(flags);
26 unsigned int access:1;
27 unsigned int flash_access:1;
28 kmemcheck_bitfield_end(flags);
29
30 int id;
31 char name[C2PORT_NAME_LEN];
32 struct c2port_ops *ops;
33 struct mutex mutex; /* prevent races during read/write */
34
35 struct device *dev;
36
37 void *private_data;
38 };
39
40 /* Basic operations */
41 struct c2port_ops {
42 /* Flash layout */
43 unsigned short block_size; /* flash block size in bytes */
44 unsigned short blocks_num; /* flash blocks number */
45
46 /* Enable or disable the access to C2 port */
47 void (*access)(struct c2port_device *dev, int status);
48
49 /* Set C2D data line as input/output */
50 void (*c2d_dir)(struct c2port_device *dev, int dir);
51
52 /* Read/write C2D data line */
53 int (*c2d_get)(struct c2port_device *dev);
54 void (*c2d_set)(struct c2port_device *dev, int status);
55
56 /* Write C2CK clock line */
57 void (*c2ck_set)(struct c2port_device *dev, int status);
58 };
59
60 /*
61 * Exported functions
62 */
63
64 extern struct c2port_device *c2port_device_register(char *name,
65 struct c2port_ops *ops, void *devdata);
66 extern void c2port_device_unregister(struct c2port_device *dev);