| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 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 |