1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Common Definitions for Janz MODULbus devices
4 *
5 * Copyright (c) 2010 Ira W. Snyder <iws@ovro.caltech.edu>
6 */
7
8 #ifndef JANZ_H
9 #define JANZ_H
10
11 struct janz_platform_data {
12 /* MODULbus Module Number */
13 unsigned int modno;
14 };
15
16 /* PLX bridge chip onboard registers */
17 struct janz_cmodio_onboard_regs {
18 u8 unused1;
19
20 /*
21 * Read access: interrupt status
22 * Write access: interrupt disable
23 */
24 u8 int_disable;
25 u8 unused2;
26
27 /*
28 * Read access: MODULbus number (hex switch)
29 * Write access: interrupt enable
30 */
31 u8 int_enable;
32 u8 unused3;
33
34 /* write-only */
35 u8 reset_assert;
36 u8 unused4;
37
38 /* write-only */
39 u8 reset_deassert;
40 u8 unused5;
41
42 /* read-write access to serial EEPROM */
43 u8 eep;
44 u8 unused6;
45
46 /* write-only access to EEPROM chip select */
47 u8 enid;
48 };
49
50 #endif /* JANZ_H */