HelenOS sources

root/kernel/genarch/include/genarch/drivers/am335x/cm_dpll.h

INCLUDED FROM

DEFINITIONS

1. am335x_cm_dpll_timer_reg_get
2. am335x_clock_source_select

/*
 * 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 DPLL.
 */

#ifndef _KERN_AM335X_CM_DPLL_H_
#define _KERN_AM335X_CM_DPLL_H_

#include "cm_dpll_regs.h"
#include "timer.h"

#define AM335x_CM_DPLL_BASE_ADDRESS   0x44E00500
#define AM335x_CM_DPLL_SIZE           256

static ioport32_t *am335x_cm_dpll_timer_reg_get(am335x_cm_dpll_regs_t *cm,
    am335x_timer_id_t id)
{
        switch (id) {
        default:
                return NULL;
        case DMTIMER2:
                return &cm->clksel_timer2;
        case DMTIMER3:
                return &cm->clksel_timer3;
        case DMTIMER4:
                return &cm->clksel_timer4;
        case DMTIMER5:
                return &cm->clksel_timer5;
        case DMTIMER6:
                return &cm->clksel_timer6;
        case DMTIMER7:
                return &cm->clksel_timer7;
        }
}

static void am335x_clock_source_select(am335x_cm_dpll_regs_t *cm,
    am335x_timer_id_t id, am335x_clk_src_t src)
{
        ioport32_t *reg = am335x_cm_dpll_timer_reg_get(cm, id);
        if (!reg)
                return;

        *reg = (*reg & ~0x03) | src;
}

#endif

/**
 * @}
 */