firmware/target/arm/as3525/system-target.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 Rafaël Carré
  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 #ifndef SYSTEM_TARGET_H
  22 #define SYSTEM_TARGET_H
  23
  24 #include "system-arm.h"
  25 #include "mmu-arm.h"
  26 #include "panic.h"
  27
  28 #include "clock-target.h" /* CPUFREQ_* are defined here */
  29
  30 /* We can use a interrupt-based mechanism on the fuzev2 */
  31 #define INCREASED_SCROLLWHEEL_POLLING \
  32     (defined(HAVE_SCROLLWHEEL) && (CONFIG_CPU == AS3525))
  33
  34 #if INCREASED_SCROLLWHEEL_POLLING
  35 /* let the timer interrupt twice as often for the scrollwheel polling */
  36 #define KERNEL_TIMER_FREQ (TIMER_FREQ/2)
  37 #else
  38 #define KERNEL_TIMER_FREQ TIMER_FREQ
  39 #endif
  40
  41 #define AS3525_UNCACHED_ADDR(a) ((typeof(a)) ((uintptr_t)(a) + 0x10000000))
  42
  43 #ifdef SANSA_C200V2
  44 /* 0: Backlight on A5, 1: Backlight on A7 */
  45 extern int c200v2_variant;
  46 /* c200v2 changes the timer interval often due to software pwm */
  47 #define TIMER_PERIOD TIMER2_BGLOAD
  48 #else
  49 #define TIMER_PERIOD (KERNEL_TIMER_FREQ/HZ)
  50 #endif
  51
  52 void udelay(unsigned usecs);
  53 static inline void mdelay(unsigned msecs)
  54 {
  55     udelay(1000 * msecs);
  56 }
  57 #endif /* SYSTEM_TARGET_H */