2 * Silicon Labs C2 port Linux support
4 * Copyright (c) 2007 Rodolfo Giometti <giometti@linux.it>
5 * Copyright (c) 2007 Eurotech S.p.A. <info@eurotech.it>
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
12 #include <linux/kmemcheck.h>
14 #define C2PORT_NAME_LEN 32
19 * C2 port basic structs
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);
31 char name[C2PORT_NAME_LEN];
32 struct c2port_ops *ops;
33 struct mutex mutex; /* prevent races during read/write */
40 /* Basic operations */
43 unsigned short block_size; /* flash block size in bytes */
44 unsigned short blocks_num; /* flash blocks number */
46 /* Enable or disable the access to C2 port */
47 void (*access)(struct c2port_device *dev, int status);
49 /* Set C2D data line as input/output */
50 void (*c2d_dir)(struct c2port_device *dev, int dir);
52 /* Read/write C2D data line */
53 int (*c2d_get)(struct c2port_device *dev);
54 void (*c2d_set)(struct c2port_device *dev, int status);
56 /* Write C2CK clock line */
57 void (*c2ck_set)(struct c2port_device *dev, int status);
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);