262e1f2b3f
development systems and the RB800 (routerboard 800) platform. The CF on the RB800 doesn't work yet.
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/* $NetBSD: ds1553rtc.c,v 1.2 2011/01/18 01:10:25 matt Exp $ */
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/*-
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* Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
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* Agency and which was developed by Matt Thomas of 3am Software Foundry.
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*
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* This material is based upon work supported by the Defense Advanced Research
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* Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
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* Contract No. N66001-09-C-2073.
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* Approved for Public Release, Distribution Unlimited
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND 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 THE FOUNDATION OR CONTRIBUTORS
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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 "locators.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ds1553rtc.c,v 1.2 2011/01/18 01:10:25 matt Exp $");
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#include <sys/param.h>
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#include <sys/cpu.h>
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#include <sys/device.h>
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#include <sys/tty.h>
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#include "ioconf.h"
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#include <sys/intr.h>
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#include <sys/bus.h>
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#include <dev/clock_subr.h>
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#include <dev/ic/mk48txxvar.h>
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#include <powerpc/booke/cpuvar.h>
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static int ds1553rtc_match(device_t, cfdata_t, void *);
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static void ds1553rtc_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(ds1553rtc, sizeof(struct mk48txx_softc),
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ds1553rtc_match, ds1553rtc_attach, NULL, NULL);
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static int
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ds1553rtc_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct generic_attach_args * const ga = aux;
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bus_space_handle_t bsh;
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int error;
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int rv;
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uint8_t saved_data, new_data;
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bus_size_t size = ga->ga_size;
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if (ga->ga_addr == OBIOCF_ADDR_DEFAULT)
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return 0;
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if (size == OBIOCF_SIZE_DEFAULT)
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size = 8192;
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/*
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* If this is NVRAM+RTC, make sure we can modify the NVRAM.
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*/
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error = bus_space_map(ga->ga_bst, ga->ga_addr, size, 0, &bsh);
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if (error)
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return 0;
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bus_size_t target = size - 17;
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saved_data = bus_space_read_1(ga->ga_bst, bsh, target);
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bus_space_write_1(ga->ga_bst, bsh, target, ~saved_data);
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new_data = bus_space_read_1(ga->ga_bst, bsh, target);
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rv = (new_data == (uint8_t) ~saved_data);
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bus_space_write_1(ga->ga_bst, bsh, target, saved_data);
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bus_space_unmap(ga->ga_bst, bsh, size);
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return rv;
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}
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static void
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ds1553rtc_attach(device_t parent, device_t self, void *aux)
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{
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struct mk48txx_softc * const sc = device_private(self);
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struct generic_attach_args * const ga = aux;
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int error;
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bus_size_t size = ga->ga_size;
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if (size == OBIOCF_SIZE_DEFAULT)
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size = 8192;
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sc->sc_dev = self;
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sc->sc_bst = ga->ga_bst;
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sc->sc_model = "ds1553";
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sc->sc_flag = MK48TXX_HAVE_CENT_REG;
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error = bus_space_map(sc->sc_bst, ga->ga_addr, size, 0, &sc->sc_bsh);
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if (error) {
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aprint_error(": failed to map registers: %d\n", error);
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return;
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}
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mk48txx_attach(sc);
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aprint_normal("\n");
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}
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