drivers/gpu/drm/litevideo/mmcm.h

   1 /* SPDX-License-Identifier: GPL-2.0
   2  *
   3  * Copyright (C) 2020 Antmicro <www.antmicro.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #ifndef _LITEVIDEO_MMCM_H_
  16 #define _LITEVIDEO_MMCM_H_
  17
  18 /* mmcm addresses */
  19
  20 #define MMCM_CLKFBOUT1     0x14
  21 #define MMCM_DIVCLK        0x16
  22 #define MMCM_CLKOUT0       0x08
  23 #define MMCM_CLKOUT1       0x0a
  24
  25 /* predefined values and shifts */
  26
  27 #define MMCM_HT_FALLING_EDGE   0x1000
  28 #define MMCM_HT_SHIFT          6
  29 #define MMCM_LT_SHIFT          0
  30
  31 /* This values should be set both to HIGH_TIME and LOW_TIME in CLKOUTx
  32  * - clk division time = 2*VALUE   // (i.e. MMCM_CLKOUT_DIV10)
  33  * - duty              = 50%       // (HIGH_TIME / (HIGH_TIME + LOW_TIME))
  34  */
  35
  36 #define MMCM_CLKOUT_DIV10  5
  37 #define MMCM_CLKOUT_DIV2   1
  38
  39 #define MMCM_WRITE         1
  40
  41 #define MMCM_MIN_M         2
  42 #define MMCM_MAX_M         128
  43 #define MMCM_MIN_D         1
  44 #define MMCM_MAX_D         128
  45
  46 #endif /* _LITEVIDEO_MMCM_H_ */