mirror of
https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-08-09 22:20:19 -04:00
131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/* $NetBSD: imx31_clock.c,v 1.5 2012/10/27 17:17:39 chs Exp $ */
|
|
/*
|
|
* Copyright (c) 2009,2010 Genetec corp. All rights reserved.
|
|
* Written by Hashimoto Kenichi for Genetec corp.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY GENETEC CORP. ``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 GENETEC CORP.
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/evcnt.h>
|
|
#include <sys/atomic.h>
|
|
#include <sys/time.h>
|
|
#include <sys/timetc.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <machine/intr.h>
|
|
#include <sys/bus.h>
|
|
|
|
#include <arm/cpu.h>
|
|
#include <arm/armreg.h>
|
|
#include <arm/cpufunc.h>
|
|
|
|
#include <arm/imx/imx31reg.h>
|
|
#include <arm/imx/imx31var.h>
|
|
#if 0 /* notyet */
|
|
#include <arm/imx/imx31_ccmvar.h>
|
|
#endif
|
|
#include <arm/imx/imxclockvar.h>
|
|
#include <arm/imx/imxepitreg.h>
|
|
|
|
#include "imxccm.h" /* if CCM driver is configured into the kernel */
|
|
#include "opt_imx31clk.h"
|
|
|
|
static int imxclock_match(device_t, struct cfdata *, void *);
|
|
static void imxclock_attach(device_t, device_t, void *);
|
|
|
|
struct imxclock_softc *epit1_sc = NULL;
|
|
struct imxclock_softc *epit2_sc = NULL;
|
|
|
|
CFATTACH_DECL_NEW(imxclock, sizeof(struct imxclock_softc),
|
|
imxclock_match, imxclock_attach, NULL, NULL);
|
|
|
|
static int
|
|
imxclock_match(device_t parent, struct cfdata *match, void *aux)
|
|
{
|
|
struct aips_attach_args *aipsa = aux;
|
|
|
|
if ( (aipsa->aipsa_addr != EPIT1_BASE) &&
|
|
(aipsa->aipsa_addr != EPIT2_BASE) ) {
|
|
return 0;
|
|
}
|
|
|
|
return 2;
|
|
}
|
|
|
|
static void
|
|
imxclock_attach(device_t parent, device_t self, void *aux)
|
|
{
|
|
struct imxclock_softc *sc = device_private(self);
|
|
struct aips_attach_args *aipsa = aux;
|
|
|
|
aprint_normal("\n");
|
|
|
|
sc->sc_dev = self;
|
|
sc->sc_iot = aipsa->aipsa_memt;
|
|
sc->sc_intr = aipsa->aipsa_intr;
|
|
|
|
KASSERT((sc->sc_intr == IRQ_EPIT1) || (sc->sc_intr == IRQ_EPIT2));
|
|
|
|
switch ( aipsa->aipsa_addr ) {
|
|
case EPIT1_BASE:
|
|
epit1_sc = sc;
|
|
break;
|
|
case EPIT2_BASE:
|
|
epit2_sc = sc;
|
|
break;
|
|
default:
|
|
panic("%s: invalid address %p", device_xname(self), (void *)aipsa->aipsa_addr);
|
|
break;
|
|
}
|
|
|
|
if (bus_space_map(aipsa->aipsa_memt, aipsa->aipsa_addr,
|
|
aipsa->aipsa_size, 0, &sc->sc_ioh)) {
|
|
panic("%s: Cannot map registers", device_xname(self));
|
|
}
|
|
|
|
sc->sc_clksrc = EPITCR_CLKSRC_HIGH;
|
|
}
|
|
|
|
int
|
|
imxclock_get_timerfreq(struct imxclock_softc *sc)
|
|
{
|
|
#if NIMXCCM > 0
|
|
struct imx31_clocks clk;
|
|
imx31_get_clocks(&clk);
|
|
|
|
return clk.ipg_clk;
|
|
#else
|
|
#ifndef IMX31_IPGCLK_FREQ
|
|
#error IMX31_IPGCLK_FREQ need to be defined.
|
|
#endif
|
|
return IMX31_IPGCLK_FREQ;
|
|
|
|
#endif
|
|
}
|
|
|
|
|