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 #ifdef SANSA_FUZEPLUS
  26 #define USER_TIMER_NR   1
  27 #elif defined(CREATIVE_ZENXFI2)
  28 #define USER_TIMER_NR   1
  29 #elif defined(CREATIVE_ZENXFI3)
  30 #define USER_TIMER_NR   1
  31 #else
  32 #error Select user timer !
  33 #endif
  34
  35 static long timer_cycles = 0;
  36
  37 static void timer_fn(void)
  38 {
  39     if(pfn_timer)
  40         pfn_timer();
  41 }
  42
  43 bool timer_set(long cycles, bool start)
  44 {
  45     timer_stop();
  46
  47     if(start && pfn_unregister)
  48     {
  49         pfn_unregister();
  50         pfn_unregister = NULL;
  51     }
  52
  53     timer_cycles = cycles;
  54
  55     return true;
  56 }
  57
  58 bool timer_start(IF_COP_VOID(int core))
  59 {
  60     imx233_setup_timer(USER_TIMER_NR, true, timer_cycles,
  61         HW_TIMROT_TIMCTRL__SELECT_32KHZ_XTAL, HW_TIMROT_TIMCTRL__PRESCALE_1,
  62             false, &timer_fn);
  63     return true;
  64 }
  65
  66 void timer_stop(void)
  67 {
  68     imx233_setup_timer(USER_TIMER_NR, false, 0, HW_TIMROT_TIMCTRL__SELECT_NEVER_TICK,
  69         HW_TIMROT_TIMCTRL__PRESCALE_1, false, NULL);
  70 }