112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
/* $NetBSD: rockchip_timer.c,v 1.2 2015/01/17 15:05:24 jmcneill Exp $ */
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/*-
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* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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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 THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: rockchip_timer.c,v 1.2 2015/01/17 15:05:24 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/intr.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/timetc.h>
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#include <arm/rockchip/rockchip_reg.h>
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#include <arm/rockchip/rockchip_var.h>
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#include <arm/rockchip/rockchip_timerreg.h>
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struct rktimer_softc {
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device_t sc_dev;
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bus_space_tag_t sc_bst;
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bus_space_handle_t sc_bsh;
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struct timecounter sc_tc;
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};
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#define TIMER_READ(sc, reg) \
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bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
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#define TIMER_WRITE(sc, reg, val) \
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bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
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static int rktimer_match(device_t, cfdata_t, void *);
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static void rktimer_attach(device_t, device_t, void *);
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static u_int rktimer_get_timecount(struct timecounter *);
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CFATTACH_DECL_NEW(rktimer, sizeof(struct rktimer_softc),
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rktimer_match, rktimer_attach, NULL, NULL);
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static int
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rktimer_match(device_t parent, cfdata_t cf, void *aux)
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{
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if (rockchip_chip_id() == ROCKCHIP_CHIP_ID_RK3066)
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return 0;
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return 1;
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}
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static void
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rktimer_attach(device_t parent, device_t self, void *aux)
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{
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struct rktimer_softc *sc = device_private(self);
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struct obio_attach_args * const obio = aux;
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sc->sc_dev = self;
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sc->sc_bst = obio->obio_bst;
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bus_space_subregion(obio->obio_bst, obio->obio_bsh, obio->obio_offset,
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obio->obio_size, &sc->sc_bsh);
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aprint_naive("\n");
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aprint_normal("\n");
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TIMER_WRITE(sc, TIMER0_CONTROL_REG, 0);
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TIMER_WRITE(sc, TIMER0_LOAD_COUNT0_REG, 0xffffffff);
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TIMER_WRITE(sc, TIMER0_LOAD_COUNT1_REG, 0xffffffff);
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TIMER_WRITE(sc, TIMER0_CONTROL_REG, TIMER_CONTROL_ENABLE);
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sc->sc_tc.tc_get_timecount = rktimer_get_timecount;
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sc->sc_tc.tc_poll_pps = NULL;
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sc->sc_tc.tc_counter_mask = ~0;
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sc->sc_tc.tc_frequency = ROCKCHIP_REF_FREQ;
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sc->sc_tc.tc_name = "TIMER0";
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sc->sc_tc.tc_priv = sc;
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sc->sc_tc.tc_quality = 900;
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tc_init(&sc->sc_tc);
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}
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static u_int
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rktimer_get_timecount(struct timecounter *tc)
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{
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struct rktimer_softc *sc = tc->tc_priv;
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return ~TIMER_READ(sc, TIMER0_CURRENT_VALUE0_REG);
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}
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