drivers/clk/versatile/icst.h

   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