341 lines
8.7 KiB
C
341 lines
8.7 KiB
C
/* $NetBSD: fdc_acpi.c,v 1.42 2012/02/02 19:43:02 tls Exp $ */
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/*
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* Copyright (c) 2002 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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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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/*
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* ACPI attachment for the PC Floppy Controller driver, based on
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* sys/arch/i386/pnpbios/fdc_pnpbios.c by Jason R. Thorpe
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: fdc_acpi.c,v 1.42 2012/02/02 19:43:02 tls Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/disk.h>
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#include <sys/systm.h>
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#include <sys/rnd.h>
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#include <dev/acpi/acpireg.h>
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#include <dev/acpi/acpivar.h>
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#include <dev/isa/isadmavar.h>
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#include <dev/isa/fdcvar.h>
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#include <dev/isa/fdvar.h>
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#include <dev/isa/fdreg.h>
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#include <dev/acpi/fdc_acpireg.h>
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#define _COMPONENT ACPI_RESOURCE_COMPONENT
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ACPI_MODULE_NAME ("fdc_acpi")
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static int fdc_acpi_match(device_t, cfdata_t, void *);
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static void fdc_acpi_attach(device_t, device_t, void *);
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struct fdc_acpi_softc {
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struct fdc_softc sc_fdc;
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bus_space_handle_t sc_baseioh;
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struct acpi_devnode *sc_node; /* ACPI devnode */
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};
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static int fdc_acpi_enumerate(struct fdc_acpi_softc *);
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static void fdc_acpi_getknownfds(struct fdc_acpi_softc *);
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static const struct fd_type *fdc_acpi_nvtotype(const char *, int, int);
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CFATTACH_DECL_NEW(fdc_acpi, sizeof(struct fdc_acpi_softc), fdc_acpi_match,
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fdc_acpi_attach, NULL, NULL);
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/*
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* Supported device IDs
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*/
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static const char * const fdc_acpi_ids[] = {
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"PNP07??", /* PC standard floppy disk controller */
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NULL
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};
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/*
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* fdc_acpi_match: autoconf(9) match routine
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*/
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static int
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fdc_acpi_match(device_t parent, cfdata_t match, void *aux)
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{
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struct acpi_attach_args *aa = aux;
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if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
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return 0;
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return acpi_match_hid(aa->aa_node->ad_devinfo, fdc_acpi_ids);
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}
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/*
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* fdc_acpi_attach: autoconf(9) attach routine
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*/
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static void
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fdc_acpi_attach(device_t parent, device_t self, void *aux)
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{
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struct fdc_acpi_softc *asc = device_private(self);
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struct fdc_softc *sc = &asc->sc_fdc;
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struct acpi_attach_args *aa = aux;
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struct acpi_io *io, *ctlio;
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struct acpi_irq *irq;
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struct acpi_drq *drq;
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struct acpi_resources res;
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ACPI_STATUS rv;
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sc->sc_dev = self;
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sc->sc_ic = aa->aa_ic;
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asc->sc_node = aa->aa_node;
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/* parse resources */
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rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
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&res, &acpi_resource_parse_ops_default);
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if (ACPI_FAILURE(rv))
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return;
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/* find our i/o registers */
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io = acpi_res_io(&res, 0);
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if (io == NULL) {
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aprint_error_dev(sc->sc_dev,
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"unable to find i/o register resource\n");
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goto out;
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}
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/* find our IRQ */
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irq = acpi_res_irq(&res, 0);
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if (irq == NULL) {
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aprint_error_dev(sc->sc_dev, "unable to find irq resource\n");
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goto out;
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}
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/* find our DRQ */
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drq = acpi_res_drq(&res, 0);
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if (drq == NULL) {
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aprint_error_dev(sc->sc_dev, "unable to find drq resource\n");
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goto out;
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}
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sc->sc_drq = drq->ar_drq;
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sc->sc_iot = aa->aa_iot;
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if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length,
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0, &asc->sc_baseioh)) {
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aprint_error_dev(sc->sc_dev, "can't map i/o space\n");
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goto out;
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}
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switch (io->ar_length) {
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case 4:
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sc->sc_ioh = asc->sc_baseioh;
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break;
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case 6:
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if (bus_space_subregion(sc->sc_iot, asc->sc_baseioh, 2, 4,
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&sc->sc_ioh)) {
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aprint_error_dev(sc->sc_dev,
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"unable to subregion i/o space\n");
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goto out;
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}
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break;
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default:
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aprint_error_dev(sc->sc_dev,
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"unknown size: %d of io mapping\n", io->ar_length);
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goto out;
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}
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/*
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* omitting the controller I/O port. (One has to exist for there to
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* be a working fdc). Just try and force the mapping in.
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*/
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ctlio = acpi_res_io(&res, 1);
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if (ctlio == NULL) {
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if (bus_space_map(sc->sc_iot, io->ar_base + io->ar_length + 1,
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1, 0, &sc->sc_fdctlioh)) {
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aprint_error_dev(sc->sc_dev,
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"unable to force map ctl i/o space\n");
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goto out;
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}
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aprint_verbose_dev(sc->sc_dev,
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"ctl io %x did't probe. Forced attach\n",
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io->ar_base + io->ar_length + 1);
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} else {
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if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length,
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0, &sc->sc_fdctlioh)) {
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aprint_error_dev(sc->sc_dev,
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"unable to map ctl i/o space\n");
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goto out;
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}
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}
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sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq,
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(irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL,
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IPL_BIO, fdcintr, sc);
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/* Setup direct configuration of floppy drives */
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sc->sc_present = fdc_acpi_enumerate(asc);
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if (sc->sc_present >= 0) {
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sc->sc_known = 1;
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fdc_acpi_getknownfds(asc);
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} else {
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/*
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* XXX if there is no _FDE control method, attempt to
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* probe without pnp
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*/
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aprint_debug_dev(sc->sc_dev,
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"unable to enumerate, attempting normal probe\n");
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}
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fdcattach(sc);
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out:
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acpi_resource_cleanup(&res);
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}
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static int
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fdc_acpi_enumerate(struct fdc_acpi_softc *asc)
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{
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struct fdc_softc *sc = &asc->sc_fdc;
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ACPI_OBJECT *fde;
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ACPI_BUFFER abuf;
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ACPI_STATUS rv;
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uint32_t *p;
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int i, drives = -1;
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rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &abuf);
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if (ACPI_FAILURE(rv)) {
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aprint_normal_dev(sc->sc_dev, "failed to evaluate _FDE: %s\n",
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AcpiFormatException(rv));
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return drives;
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}
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fde = abuf.Pointer;
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if (fde->Type != ACPI_TYPE_BUFFER) {
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aprint_error_dev(sc->sc_dev, "expected BUFFER, got %u\n",
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fde->Type);
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goto out;
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}
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if (fde->Buffer.Length < 5 * sizeof(uint32_t)) {
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aprint_error_dev(sc->sc_dev,
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"expected buffer len of %lu, got %u\n",
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(unsigned long)(5 * sizeof(uint32_t)), fde->Buffer.Length);
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goto out;
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}
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p = (uint32_t *)fde->Buffer.Pointer;
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/*
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* Indexes 0 through 3 are each uint32_t booleans. True if a drive
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* is present.
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*/
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drives = 0;
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for (i = 0; i < 4; i++) {
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if (p[i]) drives |= (1 << i);
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aprint_normal_dev(sc->sc_dev, "drive %d %sattached\n", i,
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p[i] ? "" : "not ");
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}
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/*
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* p[4] reports tape presence. Possible values:
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* 0 - Unknown if device is present
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* 1 - Device is present
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* 2 - Device is never present
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* >2 - Reserved
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*
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* we don't currently use this.
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*/
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out:
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ACPI_FREE(abuf.Pointer);
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return drives;
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}
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static void
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fdc_acpi_getknownfds(struct fdc_acpi_softc *asc)
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{
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struct fdc_softc *sc = &asc->sc_fdc;
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ACPI_OBJECT *fdi, *e;
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ACPI_BUFFER abuf;
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ACPI_STATUS rv;
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int i;
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for (i = 0; i < 4; i++) {
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if ((sc->sc_present & (1 << i)) == 0)
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continue;
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rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &abuf);
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if (ACPI_FAILURE(rv)) {
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aprint_normal_dev(sc->sc_dev,
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"failed to evaluate _FDI: %s on drive %d\n",
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AcpiFormatException(rv), i);
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/* XXX if _FDI fails, assume 1.44MB floppy */
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sc->sc_knownfds[i] = &fdc_acpi_fdtypes[0];
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continue;
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}
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fdi = abuf.Pointer;
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if (fdi->Type != ACPI_TYPE_PACKAGE) {
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aprint_error_dev(sc->sc_dev,
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"expected PACKAGE, got %u\n", fdi->Type);
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goto out;
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}
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e = fdi->Package.Elements;
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sc->sc_knownfds[i] = fdc_acpi_nvtotype(
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device_xname(sc->sc_dev),
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e[1].Integer.Value, e[0].Integer.Value);
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/* if fdc_acpi_nvtotype returns NULL, don't attach drive */
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if (!sc->sc_knownfds[i])
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sc->sc_present &= ~(1 << i);
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out:
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ACPI_FREE(abuf.Pointer);
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}
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}
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static const struct fd_type *
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fdc_acpi_nvtotype(const char *fdc, int nvraminfo, int drive)
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{
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int type;
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type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0;
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switch (type) {
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case ACPI_FDC_DISKETTE_NONE:
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return NULL;
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case ACPI_FDC_DISKETTE_12M:
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return &fdc_acpi_fdtypes[1];
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case ACPI_FDC_DISKETTE_TYPE5:
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case ACPI_FDC_DISKETTE_TYPE6:
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case ACPI_FDC_DISKETTE_144M:
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return &fdc_acpi_fdtypes[0];
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case ACPI_FDC_DISKETTE_360K:
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return &fdc_acpi_fdtypes[3];
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case ACPI_FDC_DISKETTE_720K:
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return &fdc_acpi_fdtypes[4];
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default:
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aprint_normal("%s: drive %d: unknown device type 0x%x\n",
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fdc, drive, type);
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return NULL;
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}
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}
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