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