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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
*
* Support functions for calculating clocks/divisors for the ICST
* clock generators. See https://www.idt.com/ for more information
* on these devices.
*/
#ifndef ICST_H
#define ICST_H
struct icst_params {
unsigned long ref;
unsigned long vco_max; /* inclusive */
unsigned long vco_min; /* exclusive */
unsigned short vd_min; /* inclusive */
unsigned short vd_max; /* inclusive */
unsigned char rd_min; /* inclusive */
unsigned char rd_max; /* inclusive */
const unsigned char *s2div; /* chip specific s2div array */
const unsigned char *idx2s; /* chip specific idx2s array */
};
struct icst_vco {
unsigned short v;
unsigned char r;
unsigned char s;
};
unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco);
struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq);
/*
* ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V).
* This frequency is pre-output divider.
*/
#define ICST307_VCO_MIN 6000000
#define ICST307_VCO_MAX 200000000
extern const unsigned char icst307_s2div[];
extern const unsigned char icst307_idx2s[];
/*
* ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V).
* This frequency is pre-output divider.
*/
#define ICST525_VCO_MIN 10000000
#define ICST525_VCO_MAX_3V 200000000
#define ICST525_VCO_MAX_5V 320000000
extern const unsigned char icst525_s2div[];
extern const unsigned char icst525_idx2s[];
#endif
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