1 /*
2  *  Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  *  Support functions for calculating clocks/divisors for the ICST
9  *  clock generators.  See http://www.idt.com/ for more information
10  *  on these devices.
11  */
12 #ifndef ICST_H
13 #define ICST_H
14 
15 struct icst_params {
16 	unsigned long	ref;
17 	unsigned long	vco_max;	/* inclusive */
18 	unsigned long	vco_min;	/* exclusive */
19 	unsigned short	vd_min;		/* inclusive */
20 	unsigned short	vd_max;		/* inclusive */
21 	unsigned char	rd_min;		/* inclusive */
22 	unsigned char	rd_max;		/* inclusive */
23 	const unsigned char *s2div;	/* chip specific s2div array */
24 	const unsigned char *idx2s;	/* chip specific idx2s array */
25 };
26 
27 struct icst_vco {
28 	unsigned short	v;
29 	unsigned char	r;
30 	unsigned char	s;
31 };
32 
33 unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco);
34 struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq);
35 
36 /*
37  * ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V).
38  * This frequency is pre-output divider.
39  */
40 #define ICST307_VCO_MIN	6000000
41 #define ICST307_VCO_MAX	200000000
42 
43 extern const unsigned char icst307_s2div[];
44 extern const unsigned char icst307_idx2s[];
45 
46 /*
47  * ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V).
48  * This frequency is pre-output divider.
49  */
50 #define ICST525_VCO_MIN		10000000
51 #define ICST525_VCO_MAX_3V	200000000
52 #define ICST525_VCO_MAX_5V	320000000
53 
54 extern const unsigned char icst525_s2div[];
55 extern const unsigned char icst525_idx2s[];
56 
57 #endif
58