firmware/target/arm/imx233/timer-imx233.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2011 by Amaury Pouly
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "kernel.h"
  22 #include "timrot-imx233.h"
  23 #include "timer.h"
  24
  25 static long timer_cycles = 0;
  26
  27 static void timer_fn(void)
  28 {
  29     if(pfn_timer)
  30         pfn_timer();
  31 }
  32
  33 bool timer_set(long cycles, bool start)
  34 {
  35     timer_stop();
  36
  37     if(start && pfn_unregister)
  38     {
  39         pfn_unregister();
  40         pfn_unregister = NULL;
  41     }
  42
  43     timer_cycles = cycles;
  44
  45     return true;
  46 }
  47
  48 bool timer_start(IF_COP_VOID(int core))
  49 {
  50     imx233_setup_timer(USER_TIMER_NR, true, timer_cycles,
  51         HW_TIMROT_TIMCTRL__SELECT_TICK_ALWAYS, HW_TIMROT_TIMCTRL__PRESCALE_1,
  52             false, &timer_fn);
  53     return true;
  54 }
  55
  56 void timer_stop(void)
  57 {
  58     imx233_setup_timer(USER_TIMER_NR, false, 0, HW_TIMROT_TIMCTRL__SELECT_NEVER_TICK,
  59         HW_TIMROT_TIMCTRL__PRESCALE_1, false, NULL);
  60 }