/*
* Copyright (c) 2013 Maurizio Lombardi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup kernel_genarch
* @{
*/
/**
* @file
* @brief Texas Instruments AM335x clock module.
*/
#ifndef _KERN_AM335X_CM_PER_H_
#define _KERN_AM335X_CM_PER_H_
#include <typedefs.h>
#include "cm_per_regs.h"
#include "timer.h"
#define AM335x_CM_PER_BASE_ADDRESS 0x44E00000
#define AM335x_CM_PER_SIZE 1024
static ioport32_t *am335x_clock_clkctrl_reg_get(am335x_cm_per_regs_t *cm,
am335x_timer_id_t id)
{
switch (id) {
default:
return NULL;
case DMTIMER2:
return &cm->timer2_clkctrl;
case DMTIMER3:
return &cm->timer3_clkctrl;
case DMTIMER4:
return &cm->timer4_clkctrl;
case DMTIMER5:
return &cm->timer5_clkctrl;
case DMTIMER6:
return &cm->timer6_clkctrl;
case DMTIMER7:
return &cm->timer7_clkctrl;
}
}
static void am335x_clock_module_enable(am335x_cm_per_regs_t *cm,
am335x_timer_id_t timer_id)
{
ioport32_t *tmr_reg = am335x_clock_clkctrl_reg_get(cm, timer_id);
if (tmr_reg == NULL)
return;
/* Enable the clock module */
*tmr_reg = (*tmr_reg & ~0x03) | 0x02;
/* Wait for completion */
while ((*tmr_reg & 0x03) != 0x02)
;
}
#endif
/**
* @}
*/