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131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
/* $NetBSD: bcm2835_emmc.c,v 1.1 2012/07/26 06:21:57 skrll Exp $ */
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/*-
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* Copyright (c) 2012 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 Nick Hudson
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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 <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: bcm2835_emmc.c,v 1.1 2012/07/26 06:21:57 skrll Exp $");
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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/bus.h>
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#include <arm/broadcom/bcm2835reg.h>
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#include <arm/broadcom/bcm_amba.h>
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#include <dev/sdmmc/sdhcreg.h>
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#include <dev/sdmmc/sdhcvar.h>
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#include <dev/sdmmc/sdmmcvar.h>
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struct bcmemmc_softc {
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struct sdhc_softc sc;
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device_t sc_sdmmc;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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struct sdhc_host *sc_hosts[1];
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void *sc_ih;
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};
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static int bcmemmc_match(device_t, struct cfdata *, void *);
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static void bcmemmc_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(bcmemmc, sizeof(struct bcmemmc_softc),
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bcmemmc_match, bcmemmc_attach, NULL, NULL);
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/* ARGSUSED */
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static int
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bcmemmc_match(device_t parent, struct cfdata *match, void *aux)
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{
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struct amba_attach_args *aaa = aux;
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if (strcmp(aaa->aaa_name, "emmc") != 0)
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return 0;
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return 1;
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}
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/* ARGSUSED */
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static void
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bcmemmc_attach(device_t parent, device_t self, void *aux)
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{
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struct bcmemmc_softc *sc = device_private(self);
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struct amba_attach_args *aaa = aux;
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int error;
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sc->sc.sc_dev = self;
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// sc->sc.sc_dmat = aaa->amba_dmat;
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sc->sc.sc_flags = 0;
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// sc->sc.sc_flags |= SDHC_FLAG_USE_DMA; /* not available (yet) */
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sc->sc.sc_flags |= SDHC_FLAG_32BIT_ACCESS;
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sc->sc.sc_flags |= SDHC_FLAG_HOSTCAPS;
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sc->sc.sc_caps = SDHC_VOLTAGE_SUPP_3_3V;
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sc->sc.sc_host = sc->sc_hosts;
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sc->sc.sc_clkbase = 50000; /* 50MHz */
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sc->sc_iot = aaa->aaa_iot;
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error = bus_space_map(sc->sc_iot, aaa->aaa_addr, aaa->aaa_size, 0,
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&sc->sc_ioh);
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if (error) {
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aprint_error_dev(self,
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"can't map registers for %s: %d\n", aaa->aaa_name, error);
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return;
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}
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aprint_naive(": SDHC controller\n");
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aprint_normal(": SDHC controller\n");
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sc->sc_ih = bcm2835_intr_establish(aaa->aaa_intr, IPL_SDMMC, sdhc_intr,
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&sc->sc);
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if (sc->sc_ih == NULL) {
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aprint_error_dev(self, "failed to establish interrupt %d\n",
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aaa->aaa_intr);
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goto fail;
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}
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aprint_normal_dev(self, "interrupting on intr %d\n", aaa->aaa_intr);
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error = sdhc_host_found(&sc->sc, sc->sc_iot, sc->sc_ioh,
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aaa->aaa_size);
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if (error != 0) {
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aprint_error_dev(self, "couldn't initialize host, error=%d\n",
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error);
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goto fail;
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}
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return;
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fail:
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if (sc->sc_ih) {
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intr_disestablish(sc->sc_ih);
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sc->sc_ih = NULL;
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}
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bus_space_unmap(sc->sc_iot, sc->sc_ioh, aaa->aaa_size);
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}
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