131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/* $NetBSD: imx51_clock.c,v 1.2 2011/07/01 20:27:50 dyoung Exp $ */
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/*
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* Copyright (c) 2009 Genetec corp. All rights reserved.
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* Written by Hashimoto Kenichi for Genetec corp.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GENETEC CORP. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORP.
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: imx51_clock.c,v 1.2 2011/07/01 20:27:50 dyoung Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/evcnt.h>
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#include <sys/atomic.h>
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#include <sys/time.h>
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#include <sys/timetc.h>
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#include <sys/types.h>
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#include <sys/device.h>
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#include <dev/clock_subr.h>
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#include <machine/intr.h>
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#include <sys/bus.h>
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#include <arm/cpufunc.h>
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#include <arm/imx/imx51reg.h>
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#include <arm/imx/imx51var.h>
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#include <arm/imx/imxepitreg.h>
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//#include <arm/imx/imx51_ccmvar.h> notyet
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#include <arm/imx/imxclockvar.h>
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#include "imxccm.h" /* if CCM driver is configured into the kernel */
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#include "opt_imx51clk.h"
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static int imxclock_match(device_t, struct cfdata *, void *);
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static void imxclock_attach(device_t, device_t, void *);
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struct imxclock_softc *epit1_sc = NULL;
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struct imxclock_softc *epit2_sc = NULL;
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CFATTACH_DECL_NEW(imxclock, sizeof(struct imxclock_softc),
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imxclock_match, imxclock_attach, NULL, NULL);
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static int
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imxclock_match(device_t parent, struct cfdata *match, void *aux)
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{
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struct axi_attach_args *aa = aux;
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if ( (aa->aa_addr != EPIT1_BASE) &&
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(aa->aa_addr != EPIT2_BASE) ) {
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return 0;
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}
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return 2;
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}
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static void
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imxclock_attach(device_t parent, device_t self, void *aux)
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{
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struct imxclock_softc *sc = device_private(self);
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struct axi_attach_args *aa = aux;
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aprint_normal("\n");
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sc->sc_dev = self;
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sc->sc_iot = aa->aa_iot;
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sc->sc_intr = aa->aa_irq;
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KASSERT((sc->sc_intr == IRQ_EPIT1) || (sc->sc_intr == IRQ_EPIT2));
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switch ( aa->aa_addr ) {
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case EPIT1_BASE:
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epit1_sc = sc;
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break;
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case EPIT2_BASE:
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epit2_sc = sc;
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break;
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default:
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panic("%s: invalid address %p", self->dv_xname, (void *)aa->aa_addr);
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break;
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}
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if (bus_space_map(aa->aa_iot, aa->aa_addr, aa->aa_size, 0, &sc->sc_ioh))
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panic("%s: Cannot map registers", device_xname(self));
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}
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int
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imxclock_get_timerfreq(struct imxclock_softc *sc)
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{
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unsigned int ipg_freq;
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#if NIMXCCM > 0
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struct imx51_clocks clk;
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imx51_get_clocks(&clk);
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ipg_freq = clk.ipg_clk;
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#else
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#ifndef IMX51_IPGCLK_FREQ
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#error IMX51_IPGCLK_FREQ need to be defined.
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#endif
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ipg_freq = IMX51_IPGCLK_FREQ;
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#endif
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return ipg_freq;
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}
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