331 lines
10 KiB
C
331 lines
10 KiB
C
/* $Id: omap2_gpmc.c,v 1.9 2011/07/01 20:30:21 dyoung Exp $ */
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/* adapted from: */
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/* $NetBSD: omap2_gpmc.c,v 1.9 2011/07/01 20:30:21 dyoung Exp $ */
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/*
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* Autoconfiguration support for the Texas Instruments OMAP GPMC bus.
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* Based on arm/omap/omap_emifs.c which in turn was derived
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* Based on arm/xscale/pxa2x0.c which in turn was derived
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* from arm/sa11x0/sa11x0.c
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*
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* Copyright (c) 2002, 2005 Genetec Corporation. All rights reserved.
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* Written by Hiroyuki Bessho for Genetec Corporation.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Genetec Corporation.
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* 4. The name of Genetec Corporation may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``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 CORPORATION
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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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* Copyright (c) 1997,1998, 2001, 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 IWAMOTO Toshihiro, Ichiro FUKUHARA and Paul Kranenburg.
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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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* Copyright (c) 1999
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* Shin Takemura and PocketBSD Project. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the PocketBSD project
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* and its contributors.
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* 4. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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 "opt_omap.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: omap2_gpmc.c,v 1.9 2011/07/01 20:30:21 dyoung Exp $");
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#include "locators.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <machine/cpu.h>
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#include <sys/bus.h>
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#include <arm/cpufunc.h>
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#include <arm/mainbus/mainbus.h>
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#include <arm/omap/omap_var.h>
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#include <arm/omap/omap2_gpmcreg.h>
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#include <arm/omap/omap2_gpmcvar.h>
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typedef struct {
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boolean_t cs_valid;
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ulong cs_addr;
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ulong cs_size;
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} gpmc_csconfig_t;
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struct gpmc_softc {
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device_t sc_dev;
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bus_dma_tag_t sc_dmac;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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gpmc_csconfig_t sc_csconfig[GPMC_NCS];
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};
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static bus_size_t csreg7[GPMC_NCS] = {
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GPMC_CONFIG7_0,
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GPMC_CONFIG7_1,
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GPMC_CONFIG7_2,
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GPMC_CONFIG7_3,
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GPMC_CONFIG7_4,
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GPMC_CONFIG7_5,
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GPMC_CONFIG7_6,
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GPMC_CONFIG7_7,
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};
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/* prototypes */
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static int gpmc_match(device_t, cfdata_t, void *);
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static void gpmc_attach(device_t, device_t, void *);
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static void gpmc_csconfig_init(struct gpmc_softc *);
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static int gpmc_search(device_t, cfdata_t, const int *, void *);
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static int gpmc_print(void *, const char *);
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/* attach structures */
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CFATTACH_DECL_NEW(gpmc, sizeof(struct gpmc_softc),
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gpmc_match, gpmc_attach, NULL, NULL);
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static int gpmc_attached; /* XXX assumes only 1 instance */
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static int
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gpmc_match(device_t parent, cfdata_t match, void *aux)
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{
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struct mainbus_attach_args *mb = aux;
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if (gpmc_attached != 0)
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return 0;
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#if defined(OMAP2)
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if (mb->mb_iobase == GPMC_BASE)
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return 1;
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#endif
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return 0;
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}
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static void
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gpmc_attach(device_t parent, device_t self, void *aux)
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{
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struct gpmc_softc *sc = device_private(self);
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struct mainbus_attach_args *mb = aux;
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bus_space_handle_t ioh;
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uint32_t rev;
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int err;
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sc->sc_dev = self;
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sc->sc_iot = &omap_bs_tag;
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err = bus_space_map(sc->sc_iot, mb->mb_iobase, GPMC_SIZE, 0, &ioh);
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if (err != 0)
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panic("%s: Cannot map registers, error %d",
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device_xname(self), err);
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aprint_normal(": General Purpose Memory Controller");
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rev = bus_space_read_4(sc->sc_iot, ioh, GPMC_REVISION);
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aprint_normal(", rev %d.%d\n",
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GPMC_REVISION_REV_MAJ(rev),
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GPMC_REVISION_REV_MIN(rev));
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sc->sc_ioh = ioh;
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sc->sc_dmac = NULL;
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gpmc_csconfig_init(sc);
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gpmc_attached = 1;
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/*
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* Attach all our devices
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*/
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config_search_ia(gpmc_search, self, "gpmc", NULL);
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}
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static void
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gpmc_csconfig_init(struct gpmc_softc *sc)
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{
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gpmc_csconfig_t *cs;
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uint32_t r;
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int i;
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cs = &sc->sc_csconfig[0];
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for (i=0; i < GPMC_NCS; i++) {
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memset(cs, 0, sizeof(gpmc_csconfig_t));
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r = bus_space_read_4(sc->sc_iot, sc->sc_ioh, csreg7[i]);
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if ((r & GPMC_CONFIG7_CSVALID) != 0) {
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cs->cs_valid = TRUE;
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cs->cs_addr = omap_gpmc_config7_addr(r);
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cs->cs_size = omap_gpmc_config7_size(r);
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aprint_normal("%s: CS#%d valid, "
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"addr 0x%08lx, size %3ldMB\n",
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device_xname(sc->sc_dev), i,
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cs->cs_addr, (cs->cs_size >> 20));
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}
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cs++;
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}
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}
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static int
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gpmc_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
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{
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struct gpmc_softc *sc = device_private(parent);
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struct gpmc_attach_args aa;
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gpmc_csconfig_t *cs;
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int i;
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/* Set up the attach args. */
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if (cf->cf_loc[GPMCCF_NOBYTEACC] == 1) {
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if (cf->cf_loc[GPMCCF_MULT] == 1)
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aa.gpmc_iot = &nobyteacc_bs_tag;
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else
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panic("nobyteacc specified for device with "
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"non-byte multiplier\n");
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} else {
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switch (cf->cf_loc[GPMCCF_MULT]) {
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case 1:
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aa.gpmc_iot = &omap_bs_tag;
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break;
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case 2:
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aa.gpmc_iot = &omap_a2x_bs_tag;
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break;
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case 4:
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aa.gpmc_iot = &omap_a4x_bs_tag;
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break;
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default:
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panic("Unsupported EMIFS multiplier.");
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break;
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}
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}
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aa.gpmc_dmac = sc->sc_dmac;
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aa.gpmc_addr = cf->cf_loc[GPMCCF_ADDR];
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aa.gpmc_size = cf->cf_loc[GPMCCF_SIZE];
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aa.gpmc_intr = cf->cf_loc[GPMCCF_INTR];
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cs = &sc->sc_csconfig[0];
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for (i=0; i < GPMC_NCS; i++) {
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if ((aa.gpmc_addr >= cs->cs_addr)
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&& (aa.gpmc_addr < (cs->cs_addr + cs->cs_size))) {
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/* XXX
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* if size was specified, then check it too
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* otherwise just assume it is OK
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*/
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if ((aa.gpmc_size != GPMCCF_SIZE_DEFAULT)
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&& ((aa.gpmc_addr + aa.gpmc_size)
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>= (cs->cs_addr + cs->cs_size)))
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continue; /* NG */
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aa.gpmc_cs = i;
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if (config_match(parent, cf, &aa)) {
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config_attach(parent, cf, &aa, gpmc_print);
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return 0; /* love it */
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}
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}
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cs++;
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}
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return 1; /* NG */
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}
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static int
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gpmc_print(void *aux, const char *name)
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{
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struct gpmc_attach_args *sa = (struct gpmc_attach_args*)aux;
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if (sa->gpmc_addr != GPMCCF_ADDR_DEFAULT) {
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aprint_normal(" addr 0x%08lx", sa->gpmc_addr);
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if (sa->gpmc_size != GPMCCF_SIZE_DEFAULT)
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aprint_normal("-0x%08lx",
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sa->gpmc_addr + sa->gpmc_size-1);
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}
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if (sa->gpmc_intr != GPMCCF_INTR_DEFAULT)
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aprint_normal(" intr %d", sa->gpmc_intr);
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return UNCONF;
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}
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uint32_t
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gpmc_register_read(struct gpmc_softc *sc, bus_size_t reg)
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{
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return bus_space_read_4(sc->sc_iot, sc->sc_ioh, reg);
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}
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void
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gpmc_register_write(struct gpmc_softc *sc, bus_size_t reg, const uint32_t data)
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{
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, reg, data);
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}
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