NetBSD-5.0.2/sys/dev/acpi/fdc_acpi.c
/* $NetBSD: fdc_acpi.c,v 1.34 2008/03/16 13:58:22 yamt Exp $ */
/*
* Copyright (c) 2002 Jared D. McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* ACPI attachment for the PC Floppy Controller driver, based on
* sys/arch/i386/pnpbios/fdc_pnpbios.c by Jason R. Thorpe
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fdc_acpi.c,v 1.34 2008/03/16 13:58:22 yamt Exp $");
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/queue.h>
#include <sys/disk.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <sys/bus.h>
#include <sys/intr.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/acpi/acpica.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/isa/fdcvar.h>
#include <dev/isa/fdvar.h>
#include <dev/isa/fdreg.h>
#include <dev/acpi/fdc_acpireg.h>
static int fdc_acpi_match(device_t, cfdata_t, void *);
static void fdc_acpi_attach(device_t, device_t, void *);
struct fdc_acpi_softc {
struct fdc_softc sc_fdc;
bus_space_handle_t sc_baseioh;
struct acpi_devnode *sc_node; /* ACPI devnode */
};
static int fdc_acpi_enumerate(struct fdc_acpi_softc *);
static void fdc_acpi_getknownfds(struct fdc_acpi_softc *);
static const struct fd_type *fdc_acpi_nvtotype(const char *, int, int);
CFATTACH_DECL_NEW(fdc_acpi, sizeof(struct fdc_acpi_softc), fdc_acpi_match,
fdc_acpi_attach, NULL, NULL);
/*
* Supported device IDs
*/
static const char * const fdc_acpi_ids[] = {
"PNP07??", /* PC standard floppy disk controller */
NULL
};
/*
* fdc_acpi_match: autoconf(9) match routine
*/
static int
fdc_acpi_match(device_t parent, cfdata_t match, void *aux)
{
struct acpi_attach_args *aa = aux;
if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
return 0;
return acpi_match_hid(aa->aa_node->ad_devinfo, fdc_acpi_ids);
}
/*
* fdc_acpi_attach: autoconf(9) attach routine
*/
static void
fdc_acpi_attach(device_t parent, device_t self, void *aux)
{
struct fdc_acpi_softc *asc = device_private(self);
struct fdc_softc *sc = &asc->sc_fdc;
struct acpi_attach_args *aa = aux;
struct acpi_io *io, *ctlio;
struct acpi_irq *irq;
struct acpi_drq *drq;
struct acpi_resources res;
ACPI_STATUS rv;
aprint_naive("\n");
aprint_normal("\n");
sc->sc_dev = self;
sc->sc_ic = aa->aa_ic;
asc->sc_node = aa->aa_node;
/* parse resources */
rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
&res, &acpi_resource_parse_ops_default);
if (ACPI_FAILURE(rv))
return;
/* find our i/o registers */
io = acpi_res_io(&res, 0);
if (io == NULL) {
aprint_error_dev(sc->sc_dev,
"unable to find i/o register resource\n");
goto out;
}
/* find our IRQ */
irq = acpi_res_irq(&res, 0);
if (irq == NULL) {
aprint_error_dev(sc->sc_dev, "unable to find irq resource\n");
goto out;
}
/* find our DRQ */
drq = acpi_res_drq(&res, 0);
if (drq == NULL) {
aprint_error_dev(sc->sc_dev, "unable to find drq resource\n");
goto out;
}
sc->sc_drq = drq->ar_drq;
sc->sc_iot = aa->aa_iot;
if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length,
0, &asc->sc_baseioh)) {
aprint_error_dev(sc->sc_dev, "can't map i/o space\n");
goto out;
}
switch (io->ar_length) {
case 4:
sc->sc_ioh = asc->sc_baseioh;
break;
case 6:
if (bus_space_subregion(sc->sc_iot, asc->sc_baseioh, 2, 4,
&sc->sc_ioh)) {
aprint_error_dev(sc->sc_dev,
"unable to subregion i/o space\n");
goto out;
}
break;
default:
aprint_error_dev(sc->sc_dev,
"unknown size: %d of io mapping\n", io->ar_length);
goto out;
}
/*
* omitting the controller I/O port. (One has to exist for there to
* be a working fdc). Just try and force the mapping in.
*/
ctlio = acpi_res_io(&res, 1);
if (ctlio == NULL) {
if (bus_space_map(sc->sc_iot, io->ar_base + io->ar_length + 1,
1, 0, &sc->sc_fdctlioh)) {
aprint_error_dev(sc->sc_dev,
"unable to force map ctl i/o space\n");
goto out;
}
aprint_verbose_dev(sc->sc_dev,
"ctl io %x did't probe. Forced attach\n",
io->ar_base + io->ar_length + 1);
} else {
if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length,
0, &sc->sc_fdctlioh)) {
aprint_error_dev(sc->sc_dev,
"unable to map ctl i/o space\n");
goto out;
}
}
sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq,
(irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL,
IPL_BIO, fdcintr, sc);
/* Setup direct configuration of floppy drives */
sc->sc_present = fdc_acpi_enumerate(asc);
if (sc->sc_present >= 0) {
sc->sc_known = 1;
fdc_acpi_getknownfds(asc);
} else {
/*
* XXX if there is no _FDE control method, attempt to
* probe without pnp
*/
#ifdef ACPI_FDC_DEBUG
aprint_debug_dev(sc->sc_dev,
"unable to enumerate, attempting normal probe\n");
#endif
}
fdcattach(sc);
out:
acpi_resource_cleanup(&res);
}
static int
fdc_acpi_enumerate(struct fdc_acpi_softc *asc)
{
struct fdc_softc *sc = &asc->sc_fdc;
ACPI_OBJECT *fde;
ACPI_BUFFER abuf;
ACPI_STATUS rv;
UINT32 *p;
int i, drives = -1;
rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &abuf);
if (ACPI_FAILURE(rv)) {
#ifdef ACPI_FDC_DEBUG
aprint_normal_dev(sc->sc_dev, "failed to evaluate _FDE: %s\n",
AcpiFormatException(rv));
#endif
return drives;
}
fde = (ACPI_OBJECT *)abuf.Pointer;
if (fde->Type != ACPI_TYPE_BUFFER) {
aprint_error_dev(sc->sc_dev, "expected BUFFER, got %d\n",
fde->Type);
goto out;
}
if (fde->Buffer.Length < 5 * sizeof(UINT32)) {
aprint_error_dev(sc->sc_dev,
"expected buffer len of %lu, got %d\n",
(unsigned long)(5 * sizeof(UINT32)), fde->Buffer.Length);
goto out;
}
p = (UINT32 *) fde->Buffer.Pointer;
/*
* Indexes 0 through 3 are each UINT32 booleans. True if a drive
* is present.
*/
drives = 0;
for (i = 0; i < 4; i++) {
if (p[i]) drives |= (1 << i);
#ifdef ACPI_FDC_DEBUG
aprint_normal_dev(sc->sc_dev, "drive %d %sattached\n", i,
p[i] ? "" : "not ");
#endif
}
/*
* p[4] reports tape presence. Possible values:
* 0 - Unknown if device is present
* 1 - Device is present
* 2 - Device is never present
* >2 - Reserved
*
* we don't currently use this.
*/
out:
AcpiOsFree(abuf.Pointer);
return drives;
}
static void
fdc_acpi_getknownfds(struct fdc_acpi_softc *asc)
{
struct fdc_softc *sc = &asc->sc_fdc;
ACPI_OBJECT *fdi, *e;
ACPI_BUFFER abuf;
ACPI_STATUS rv;
int i;
for (i = 0; i < 4; i++) {
if ((sc->sc_present & (1 << i)) == 0)
continue;
rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &abuf);
if (ACPI_FAILURE(rv)) {
#ifdef ACPI_FDC_DEBUG
aprint_normal_dev(sc->sc_dev,
"failed to evaluate _FDI: %s on drive %d\n",
AcpiFormatException(rv), i);
#endif
/* XXX if _FDI fails, assume 1.44MB floppy */
sc->sc_knownfds[i] = &fdc_acpi_fdtypes[0];
continue;
}
fdi = (ACPI_OBJECT *)abuf.Pointer;
if (fdi->Type != ACPI_TYPE_PACKAGE) {
aprint_error_dev(sc->sc_dev,
"expected PACKAGE, got %d\n", fdi->Type);
goto out;
}
e = fdi->Package.Elements;
sc->sc_knownfds[i] = fdc_acpi_nvtotype(
device_xname(sc->sc_dev),
e[1].Integer.Value, e[0].Integer.Value);
/* if fdc_acpi_nvtotype returns NULL, don't attach drive */
if (!sc->sc_knownfds[i])
sc->sc_present &= ~(1 << i);
out:
AcpiOsFree(abuf.Pointer);
}
}
static const struct fd_type *
fdc_acpi_nvtotype(const char *fdc, int nvraminfo, int drive)
{
int type;
type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0;
switch (type) {
case ACPI_FDC_DISKETTE_NONE:
return NULL;
case ACPI_FDC_DISKETTE_12M:
return &fdc_acpi_fdtypes[1];
case ACPI_FDC_DISKETTE_TYPE5:
case ACPI_FDC_DISKETTE_TYPE6:
case ACPI_FDC_DISKETTE_144M:
return &fdc_acpi_fdtypes[0];
case ACPI_FDC_DISKETTE_360K:
return &fdc_acpi_fdtypes[3];
case ACPI_FDC_DISKETTE_720K:
return &fdc_acpi_fdtypes[4];
default:
#ifdef ACPI_FDC_DEBUG
aprint_normal("%s: drive %d: unknown device type 0x%x\n",
fdc, drive, type);
#endif
return NULL;
}
}