1 /* 2 * arch/arm/include/asm/hardware/icst.h 3 * 4 * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * Support functions for calculating clocks/divisors for the ICST 11 * clock generators. See http://www.idt.com/ for more information 12 * on these devices. 13 */ 14 #ifndef ASMARM_HARDWARE_ICST_H 15 #define ASMARM_HARDWARE_ICST_H 16 17 struct icst_params { 18 unsigned long ref; 19 unsigned long vco_max; /* inclusive */ 20 unsigned long vco_min; /* exclusive */ 21 unsigned short vd_min; /* inclusive */ 22 unsigned short vd_max; /* inclusive */ 23 unsigned char rd_min; /* inclusive */ 24 unsigned char rd_max; /* inclusive */ 25 const unsigned char *s2div; /* chip specific s2div array */ 26 const unsigned char *idx2s; /* chip specific idx2s array */ 27 }; 28 29 struct icst_vco { 30 unsigned short v; 31 unsigned char r; 32 unsigned char s; 33 }; 34 35 unsigned long icst_hz(const struct icst_params *p, struct icst_vco vco); 36 struct icst_vco icst_hz_to_vco(const struct icst_params *p, unsigned long freq); 37 38 /* 39 * ICST307 VCO frequency must be between 6MHz and 200MHz (3.3 or 5V). 40 * This frequency is pre-output divider. 41 */ 42 #define ICST307_VCO_MIN 6000000 43 #define ICST307_VCO_MAX 200000000 44 45 extern const unsigned char icst307_s2div[]; 46 extern const unsigned char icst307_idx2s[]; 47 48 /* 49 * ICST525 VCO frequency must be between 10MHz and 200MHz (3V) or 320MHz (5V). 50 * This frequency is pre-output divider. 51 */ 52 #define ICST525_VCO_MIN 10000000 53 #define ICST525_VCO_MAX_3V 200000000 54 #define ICST525_VCO_MAX_5V 320000000 55 56 extern const unsigned char icst525_s2div[]; 57 extern const unsigned char icst525_idx2s[]; 58 59 #endif 60