1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Silicon Labs C2 port Linux support |
4 | * |
5 | * Copyright (c) 2007 Rodolfo Giometti <giometti@linux.it> |
6 | * Copyright (c) 2007 Eurotech S.p.A. <info@eurotech.it> |
7 | */ |
8 | |
9 | #define C2PORT_NAME_LEN 32 |
10 | |
11 | struct device; |
12 | |
13 | /* |
14 | * C2 port basic structs |
15 | */ |
16 | |
17 | /* Main struct */ |
18 | struct c2port_ops; |
19 | struct c2port_device { |
20 | unsigned int access:1; |
21 | unsigned int flash_access:1; |
22 | |
23 | int id; |
24 | char name[C2PORT_NAME_LEN]; |
25 | struct c2port_ops *ops; |
26 | struct mutex mutex; /* prevent races during read/write */ |
27 | |
28 | struct device *dev; |
29 | |
30 | void *private_data; |
31 | }; |
32 | |
33 | /* Basic operations */ |
34 | struct c2port_ops { |
35 | /* Flash layout */ |
36 | unsigned short block_size; /* flash block size in bytes */ |
37 | unsigned short blocks_num; /* flash blocks number */ |
38 | |
39 | /* Enable or disable the access to C2 port */ |
40 | void (*access)(struct c2port_device *dev, int status); |
41 | |
42 | /* Set C2D data line as input/output */ |
43 | void (*c2d_dir)(struct c2port_device *dev, int dir); |
44 | |
45 | /* Read/write C2D data line */ |
46 | int (*c2d_get)(struct c2port_device *dev); |
47 | void (*c2d_set)(struct c2port_device *dev, int status); |
48 | |
49 | /* Write C2CK clock line */ |
50 | void (*c2ck_set)(struct c2port_device *dev, int status); |
51 | }; |
52 | |
53 | /* |
54 | * Exported functions |
55 | */ |
56 | |
57 | extern struct c2port_device *c2port_device_register(char *name, |
58 | struct c2port_ops *ops, void *devdata); |
59 | extern void c2port_device_unregister(struct c2port_device *dev); |
60 | |