1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved. 4 * 5 * Support functions for calculating clocks/divisors for the ICST 6 * clock generators. See http://www.idt.com/ for more information 7 * on these devices. 8 */ 9 #ifndef ICST_H 10 #define ICST_H 11 12 struct icst_params { 13 unsigned long ref; 14 unsigned long vco_max; /* inclusive */ 15 unsigned long vco_min; /* exclusive */ 16 unsigned short vd_min; /* inclusive */ 17 unsigned short vd_max; /* inclusive */ 18 unsigned char rd_min; /* inclusive */ 19 unsigned char rd_max; /* inclusive */ 20 const unsigned char *s2div; /* chip specific s2div array */ 21 const unsigned char *idx2s; /* chip specific idx2s array */ 22 }; 23 24 struct icst_vco { 25 unsigned short v; 26 unsigned char r; 27 unsigned char s; 28 }; 29 30 unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco); 31 struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq); 32 33 /* 34 * ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V). 35 * This frequency is pre-output divider. 36 */ 37 #define ICST307_VCO_MIN 6000000 38 #define ICST307_VCO_MAX 200000000 39 40 extern const unsigned char icst307_s2div[]; 41 extern const unsigned char icst307_idx2s[]; 42 43 /* 44 * ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V). 45 * This frequency is pre-output divider. 46 */ 47 #define ICST525_VCO_MIN 10000000 48 #define ICST525_VCO_MAX_3V 200000000 49 #define ICST525_VCO_MAX_5V 320000000 50 51 extern const unsigned char icst525_s2div[]; 52 extern const unsigned char icst525_idx2s[]; 53 54 #endif 55