2110 lines
49 KiB
C
2110 lines
49 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2004 Poul-Henning Kamp
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Don Ahn.
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*
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* Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
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* aided by the Linux floppy driver modifications from David Bateman
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* (dbateman@eng.uts.edu.au).
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*
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* Copyright (c) 1993, 1994 by
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* jc@irbs.UUCP (John Capo)
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* vak@zebub.msk.su (Serge Vakulenko)
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* ache@astral.msk.su (Andrew A. Chernov)
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*
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* Copyright (c) 1993, 1994, 1995 by
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* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
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* dufault@hda.com (Peter Dufault)
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*
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* Copyright (c) 2001 Joerg Wunsch,
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* joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
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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. Neither the name of the University 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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* from: @(#)fd.c 7.4 (Berkeley) 5/25/91
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*
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*/
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#include <sys/cdefs.h>
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#include "opt_fdc.h"
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/devicestat.h>
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#include <sys/disk.h>
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#include <sys/fcntl.h>
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#include <sys/fdcio.h>
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#include <sys/filio.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <geom/geom.h>
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#include <machine/bus.h>
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#include <machine/clock.h>
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#include <machine/stdarg.h>
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#include <isa/isavar.h>
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#include <isa/isareg.h>
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#include <isa/rtc.h>
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#include <dev/fdc/fdcvar.h>
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#include <dev/ic/nec765.h>
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/*
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* Runtime configuration hints/flags
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*/
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/* configuration flags for fd */
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#define FD_TYPEMASK 0x0f /* drive type, matches enum
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* fd_drivetype; on i386 machines, if
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* given as 0, use RTC type for fd0
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* and fd1 */
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#define FD_NO_CHLINE 0x10 /* drive does not support changeline
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* aka. unit attention */
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#define FD_NO_PROBE 0x20 /* don't probe drive (seek test), just
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* assume it is there */
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/*
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* Things that could conceiveably considered parameters or tweakables
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*/
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/*
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* Maximal number of bytes in a cylinder.
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* This is used for ISADMA bouncebuffer allocation and sets the max
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* xfersize we support.
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*
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* 2.88M format has 2 x 36 x 512, allow for hacked up density.
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*/
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#define MAX_BYTES_PER_CYL (2 * 40 * 512)
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/*
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* Timeout value for the PIO loops to wait until the FDC main status
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* register matches our expectations (request for master, direction
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* bit). This is supposed to be a number of microseconds, although
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* timing might actually not be very accurate.
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*
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* Timeouts of 100 msec are believed to be required for some broken
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* (old) hardware.
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*/
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#define FDSTS_TIMEOUT 100000
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/*
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* After this many errors, stop whining. Close will reset this count.
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*/
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#define FDC_ERRMAX 100
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/*
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* AutoDensity search lists for each drive type.
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*/
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static struct fd_type fd_searchlist_360k[] = {
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{ FDF_5_360 },
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{ 0 }
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};
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static struct fd_type fd_searchlist_12m[] = {
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{ FDF_5_1200 | FL_AUTO },
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{ FDF_5_400 | FL_AUTO },
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{ FDF_5_360 | FL_2STEP | FL_AUTO},
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{ 0 }
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};
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static struct fd_type fd_searchlist_720k[] = {
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{ FDF_3_720 },
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{ 0 }
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};
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static struct fd_type fd_searchlist_144m[] = {
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{ FDF_3_1440 | FL_AUTO},
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{ FDF_3_720 | FL_AUTO},
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{ 0 }
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};
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static struct fd_type fd_searchlist_288m[] = {
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{ FDF_3_1440 | FL_AUTO },
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#if 0
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{ FDF_3_2880 | FL_AUTO }, /* XXX: probably doesn't work */
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#endif
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{ FDF_3_720 | FL_AUTO},
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{ 0 }
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};
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/*
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* Order must match enum fd_drivetype in <sys/fdcio.h>.
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*/
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static struct fd_type *fd_native_types[] = {
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NULL, /* FDT_NONE */
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fd_searchlist_360k, /* FDT_360K */
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fd_searchlist_12m, /* FDT_12M */
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fd_searchlist_720k, /* FDT_720K */
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fd_searchlist_144m, /* FDT_144M */
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fd_searchlist_288m, /* FDT_288M_1 (mapped to FDT_288M) */
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fd_searchlist_288m, /* FDT_288M */
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};
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/*
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* Internals start here
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*/
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/* registers */
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#define FDOUT 2 /* Digital Output Register (W) */
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#define FDO_FDSEL 0x03 /* floppy device select */
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#define FDO_FRST 0x04 /* floppy controller reset */
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#define FDO_FDMAEN 0x08 /* enable floppy DMA and Interrupt */
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#define FDO_MOEN0 0x10 /* motor enable drive 0 */
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#define FDO_MOEN1 0x20 /* motor enable drive 1 */
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#define FDO_MOEN2 0x40 /* motor enable drive 2 */
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#define FDO_MOEN3 0x80 /* motor enable drive 3 */
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#define FDSTS 4 /* NEC 765 Main Status Register (R) */
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#define FDDSR 4 /* Data Rate Select Register (W) */
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#define FDDATA 5 /* NEC 765 Data Register (R/W) */
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#define FDCTL 7 /* Control Register (W) */
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/*
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* The YE-DATA PC Card floppies use PIO to read in the data rather
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* than DMA due to the wild variability of DMA for the PC Card
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* devices. DMA was deleted from the PC Card specification in version
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* 7.2 of the standard, but that post-dates the YE-DATA devices by many
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* years.
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*
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* In addition, if we cannot setup the DMA resources for the ISA
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* attachment, we'll use this same offset for data transfer. However,
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* that almost certainly won't work.
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*
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* For this mode, offset 0 and 1 must be used to setup the transfer
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* for this floppy. This is OK for PC Card YE Data devices, but for
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* ISA this is likely wrong. These registers are only available on
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* those systems that map them to the floppy drive. Newer systems do
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* not do this, and we should likely prohibit access to them (or
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* disallow NODMA to be set).
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*/
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#define FDBCDR 0 /* And 1 */
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#define FD_YE_DATAPORT 6 /* Drive Data port */
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#define FDI_DCHG 0x80 /* diskette has been changed */
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/* requires drive and motor being selected */
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/* is cleared by any step pulse to drive */
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/*
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* We have three private BIO commands.
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*/
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#define BIO_PROBE BIO_CMD0
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#define BIO_RDID BIO_CMD1
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#define BIO_FMT BIO_CMD2
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/*
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* Per drive structure (softc).
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*/
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struct fd_data {
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u_char *fd_ioptr; /* IO pointer */
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u_int fd_iosize; /* Size of IO chunks */
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u_int fd_iocount; /* Outstanding requests */
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struct fdc_data *fdc; /* pointer to controller structure */
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int fdsu; /* this units number on this controller */
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enum fd_drivetype type; /* drive type */
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struct fd_type *ft; /* pointer to current type descriptor */
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struct fd_type fts; /* type descriptors */
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int sectorsize;
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int flags;
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#define FD_WP (1<<0) /* Write protected */
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#define FD_MOTOR (1<<1) /* motor should be on */
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#define FD_MOTORWAIT (1<<2) /* motor should be on */
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#define FD_EMPTY (1<<3) /* no media */
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#define FD_NEWDISK (1<<4) /* media changed */
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#define FD_ISADMA (1<<5) /* isa dma started */
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int track; /* where we think the head is */
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#define FD_NO_TRACK -2
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int options; /* FDOPT_* */
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struct callout toffhandle;
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struct g_geom *fd_geom;
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struct g_provider *fd_provider;
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device_t dev;
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struct bio_queue_head fd_bq;
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bool gone;
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};
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#define FD_NOT_VALID -2
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static driver_intr_t fdc_intr;
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static driver_filter_t fdc_intr_fast;
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static void fdc_reset(struct fdc_data *);
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static int fd_probe_disk(struct fd_data *, int *);
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static SYSCTL_NODE(_debug, OID_AUTO, fdc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"fdc driver");
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static int fifo_threshold = 8;
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SYSCTL_INT(_debug_fdc, OID_AUTO, fifo, CTLFLAG_RW, &fifo_threshold, 0,
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"FIFO threshold setting");
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static int debugflags = 0;
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SYSCTL_INT(_debug_fdc, OID_AUTO, debugflags, CTLFLAG_RW, &debugflags, 0,
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"Debug flags");
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static int retries = 10;
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SYSCTL_INT(_debug_fdc, OID_AUTO, retries, CTLFLAG_RW, &retries, 0,
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"Number of retries to attempt");
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static int spec1 = NE7_SPEC_1(6, 240);
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SYSCTL_INT(_debug_fdc, OID_AUTO, spec1, CTLFLAG_RW, &spec1, 0,
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"Specification byte one (step-rate + head unload)");
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static int spec2 = NE7_SPEC_2(16, 0);
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SYSCTL_INT(_debug_fdc, OID_AUTO, spec2, CTLFLAG_RW, &spec2, 0,
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"Specification byte two (head load time + no-dma)");
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static int settle;
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SYSCTL_INT(_debug_fdc, OID_AUTO, settle, CTLFLAG_RW, &settle, 0,
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"Head settling time in sec/hz");
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static void
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fdprinttype(struct fd_type *ft)
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{
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printf("(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,0x%x)",
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ft->sectrac, ft->secsize, ft->datalen, ft->gap, ft->tracks,
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ft->size, ft->trans, ft->heads, ft->f_gap, ft->f_inter,
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ft->offset_side2, ft->flags);
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}
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static void
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fdsettype(struct fd_data *fd, struct fd_type *ft)
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{
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fd->ft = ft;
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ft->size = ft->sectrac * ft->heads * ft->tracks;
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fd->sectorsize = 128 << fd->ft->secsize;
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}
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/*
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* Bus space handling (access to low-level IO).
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*/
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static inline void
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fdregwr(struct fdc_data *fdc, int reg, uint8_t v)
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{
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bus_space_write_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg], v);
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}
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static inline uint8_t
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fdregrd(struct fdc_data *fdc, int reg)
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{
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return bus_space_read_1(fdc->iot, fdc->ioh[reg], fdc->ioff[reg]);
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}
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static void
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fdctl_wr(struct fdc_data *fdc, u_int8_t v)
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{
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fdregwr(fdc, FDCTL, v);
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}
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static void
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fdout_wr(struct fdc_data *fdc, u_int8_t v)
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{
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fdregwr(fdc, FDOUT, v);
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}
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static u_int8_t
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fdsts_rd(struct fdc_data *fdc)
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{
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return fdregrd(fdc, FDSTS);
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}
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static void
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fddsr_wr(struct fdc_data *fdc, u_int8_t v)
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{
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fdregwr(fdc, FDDSR, v);
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}
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static void
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fddata_wr(struct fdc_data *fdc, u_int8_t v)
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{
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fdregwr(fdc, FDDATA, v);
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}
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static u_int8_t
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fddata_rd(struct fdc_data *fdc)
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{
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return fdregrd(fdc, FDDATA);
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}
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static u_int8_t
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fdin_rd(struct fdc_data *fdc)
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{
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return fdregrd(fdc, FDCTL);
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}
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/*
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* Magic pseudo-DMA initialization for YE FDC. Sets count and
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* direction.
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*/
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static void
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fdbcdr_wr(struct fdc_data *fdc, int iswrite, uint16_t count)
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{
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fdregwr(fdc, FDBCDR, (count - 1) & 0xff);
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fdregwr(fdc, FDBCDR + 1,
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(iswrite ? 0x80 : 0) | (((count - 1) >> 8) & 0x7f));
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}
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static int
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fdc_err(struct fdc_data *fdc, const char *s)
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{
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fdc->fdc_errs++;
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if (s) {
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if (fdc->fdc_errs < FDC_ERRMAX)
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device_printf(fdc->fdc_dev, "%s", s);
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else if (fdc->fdc_errs == FDC_ERRMAX)
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device_printf(fdc->fdc_dev, "too many errors, not "
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"logging any more\n");
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}
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return (1);
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}
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/*
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* FDC IO functions, take care of the main status register, timeout
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* in case the desired status bits are never set.
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*
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* These PIO loops initially start out with short delays between
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* each iteration in the expectation that the required condition
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* is usually met quickly, so it can be handled immediately.
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*/
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static int
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fdc_in(struct fdc_data *fdc, int *ptr)
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{
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int i, j, step;
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step = 1;
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for (j = 0; j < FDSTS_TIMEOUT; j += step) {
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i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
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if (i == (NE7_DIO|NE7_RQM)) {
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i = fddata_rd(fdc);
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if (ptr)
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*ptr = i;
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return (0);
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}
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if (i == NE7_RQM)
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return (fdc_err(fdc, "ready for output in input\n"));
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step += step;
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DELAY(step);
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}
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return (fdc_err(fdc, bootverbose? "input ready timeout\n": 0));
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}
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static int
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fdc_out(struct fdc_data *fdc, int x)
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{
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int i, j, step;
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step = 1;
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for (j = 0; j < FDSTS_TIMEOUT; j += step) {
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i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM);
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if (i == NE7_RQM) {
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fddata_wr(fdc, x);
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return (0);
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}
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if (i == (NE7_DIO|NE7_RQM))
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return (fdc_err(fdc, "ready for input in output\n"));
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step += step;
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DELAY(step);
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}
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return (fdc_err(fdc, bootverbose? "output ready timeout\n": 0));
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}
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/*
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* fdc_cmd: Send a command to the chip.
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* Takes a varargs with this structure:
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* # of output bytes
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* output bytes as int [...]
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* # of input bytes
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* input bytes as int* [...]
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*/
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static int
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fdc_cmd(struct fdc_data *fdc, int n_out, ...)
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{
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u_char cmd = 0;
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int n_in;
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int n, i;
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va_list ap;
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va_start(ap, n_out);
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for (n = 0; n < n_out; n++) {
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i = va_arg(ap, int);
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if (n == 0)
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cmd = i;
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if (fdc_out(fdc, i) < 0) {
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char msg[50];
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snprintf(msg, sizeof(msg),
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"cmd %x failed at out byte %d of %d\n",
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cmd, n + 1, n_out);
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fdc->flags |= FDC_NEEDS_RESET;
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va_end(ap);
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return fdc_err(fdc, msg);
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}
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}
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n_in = va_arg(ap, int);
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for (n = 0; n < n_in; n++) {
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int *ptr = va_arg(ap, int *);
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if (fdc_in(fdc, ptr) != 0) {
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char msg[50];
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snprintf(msg, sizeof(msg),
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"cmd %02x failed at in byte %d of %d\n",
|
|
cmd, n + 1, n_in);
|
|
fdc->flags |= FDC_NEEDS_RESET;
|
|
va_end(ap);
|
|
return fdc_err(fdc, msg);
|
|
}
|
|
}
|
|
va_end(ap);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
fdc_reset(struct fdc_data *fdc)
|
|
{
|
|
int i, r[10];
|
|
|
|
if (fdc->fdct == FDC_ENHANCED) {
|
|
/* Try a software reset, default precomp, and 500 kb/s */
|
|
fddsr_wr(fdc, I8207X_DSR_SR);
|
|
} else {
|
|
/* Try a hardware reset, keep motor on */
|
|
fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
|
|
DELAY(100);
|
|
/* enable FDC, but defer interrupts a moment */
|
|
fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
|
|
}
|
|
DELAY(100);
|
|
fdout_wr(fdc, fdc->fdout);
|
|
|
|
/* XXX after a reset, silently believe the FDC will accept commands */
|
|
if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, spec1, spec2, 0))
|
|
device_printf(fdc->fdc_dev, " SPECIFY failed in reset\n");
|
|
|
|
if (fdc->fdct == FDC_ENHANCED) {
|
|
if (fdc_cmd(fdc, 4,
|
|
I8207X_CONFIG,
|
|
0,
|
|
/* 0x40 | */ /* Enable Implied Seek -
|
|
* breaks 2step! */
|
|
0x10 | /* Polling disabled */
|
|
(fifo_threshold - 1), /* Fifo threshold */
|
|
0x00, /* Precomp track */
|
|
0))
|
|
device_printf(fdc->fdc_dev,
|
|
" CONFIGURE failed in reset\n");
|
|
if (debugflags & 1) {
|
|
if (fdc_cmd(fdc, 1,
|
|
I8207X_DUMPREG,
|
|
10, &r[0], &r[1], &r[2], &r[3], &r[4],
|
|
&r[5], &r[6], &r[7], &r[8], &r[9]))
|
|
device_printf(fdc->fdc_dev,
|
|
" DUMPREG failed in reset\n");
|
|
for (i = 0; i < 10; i++)
|
|
printf(" %02x", r[i]);
|
|
printf("\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
fdc_sense_drive(struct fdc_data *fdc, int *st3p)
|
|
{
|
|
int st3;
|
|
|
|
if (fdc_cmd(fdc, 2, NE7CMD_SENSED, fdc->fd->fdsu, 1, &st3))
|
|
return (fdc_err(fdc, "Sense Drive Status failed\n"));
|
|
if (st3p)
|
|
*st3p = st3;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
fdc_sense_int(struct fdc_data *fdc, int *st0p, int *cylp)
|
|
{
|
|
int cyl, st0, ret;
|
|
|
|
ret = fdc_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
|
|
if (ret) {
|
|
(void)fdc_err(fdc, "sense intr err reading stat reg 0\n");
|
|
return (ret);
|
|
}
|
|
|
|
if (st0p)
|
|
*st0p = st0;
|
|
|
|
if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
|
|
/*
|
|
* There doesn't seem to have been an interrupt.
|
|
*/
|
|
return (FD_NOT_VALID);
|
|
}
|
|
|
|
if (fdc_in(fdc, &cyl) != 0)
|
|
return fdc_err(fdc, "can't get cyl num\n");
|
|
|
|
if (cylp)
|
|
*cylp = cyl;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
fdc_read_status(struct fdc_data *fdc)
|
|
{
|
|
int i, ret, status;
|
|
|
|
for (i = ret = 0; i < 7; i++) {
|
|
ret = fdc_in(fdc, &status);
|
|
fdc->status[i] = status;
|
|
if (ret != 0)
|
|
break;
|
|
}
|
|
|
|
if (ret == 0)
|
|
fdc->flags |= FDC_STAT_VALID;
|
|
else
|
|
fdc->flags &= ~FDC_STAT_VALID;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Select this drive
|
|
*/
|
|
static void
|
|
fd_select(struct fd_data *fd)
|
|
{
|
|
struct fdc_data *fdc;
|
|
|
|
/* XXX: lock controller */
|
|
fdc = fd->fdc;
|
|
fdc->fdout &= ~FDO_FDSEL;
|
|
fdc->fdout |= FDO_FDMAEN | FDO_FRST | fd->fdsu;
|
|
fdout_wr(fdc, fdc->fdout);
|
|
}
|
|
|
|
static void
|
|
fd_turnon(void *arg)
|
|
{
|
|
struct fd_data *fd;
|
|
struct bio *bp;
|
|
int once;
|
|
|
|
fd = arg;
|
|
mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
|
|
fd->flags &= ~FD_MOTORWAIT;
|
|
fd->flags |= FD_MOTOR;
|
|
once = 0;
|
|
for (;;) {
|
|
bp = bioq_takefirst(&fd->fd_bq);
|
|
if (bp == NULL)
|
|
break;
|
|
bioq_disksort(&fd->fdc->head, bp);
|
|
once = 1;
|
|
}
|
|
if (once)
|
|
wakeup(&fd->fdc->head);
|
|
}
|
|
|
|
static void
|
|
fd_motor(struct fd_data *fd, int turnon)
|
|
{
|
|
struct fdc_data *fdc;
|
|
|
|
fdc = fd->fdc;
|
|
/*
|
|
mtx_assert(&fdc->fdc_mtx, MA_OWNED);
|
|
*/
|
|
if (turnon) {
|
|
fd->flags |= FD_MOTORWAIT;
|
|
fdc->fdout |= (FDO_MOEN0 << fd->fdsu);
|
|
callout_reset(&fd->toffhandle, hz, fd_turnon, fd);
|
|
} else {
|
|
callout_stop(&fd->toffhandle);
|
|
fd->flags &= ~(FD_MOTOR|FD_MOTORWAIT);
|
|
fdc->fdout &= ~(FDO_MOEN0 << fd->fdsu);
|
|
}
|
|
fdout_wr(fdc, fdc->fdout);
|
|
}
|
|
|
|
static void
|
|
fd_turnoff(void *xfd)
|
|
{
|
|
struct fd_data *fd = xfd;
|
|
|
|
mtx_assert(&fd->fdc->fdc_mtx, MA_OWNED);
|
|
fd_motor(fd, 0);
|
|
}
|
|
|
|
/*
|
|
* fdc_intr - wake up the worker thread.
|
|
*/
|
|
|
|
static void
|
|
fdc_intr(void *arg)
|
|
{
|
|
|
|
wakeup(arg);
|
|
}
|
|
|
|
static int
|
|
fdc_intr_fast(void *arg)
|
|
{
|
|
|
|
wakeup(arg);
|
|
return(FILTER_HANDLED);
|
|
}
|
|
|
|
/*
|
|
* fdc_pio(): perform programmed IO read/write for YE PCMCIA floppy.
|
|
*/
|
|
static void
|
|
fdc_pio(struct fdc_data *fdc)
|
|
{
|
|
u_char *cptr;
|
|
struct bio *bp;
|
|
u_int count;
|
|
|
|
bp = fdc->bp;
|
|
cptr = fdc->fd->fd_ioptr;
|
|
count = fdc->fd->fd_iosize;
|
|
|
|
if (bp->bio_cmd == BIO_READ) {
|
|
fdbcdr_wr(fdc, 0, count);
|
|
bus_space_read_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
|
|
fdc->ioff[FD_YE_DATAPORT], cptr, count);
|
|
} else {
|
|
bus_space_write_multi_1(fdc->iot, fdc->ioh[FD_YE_DATAPORT],
|
|
fdc->ioff[FD_YE_DATAPORT], cptr, count);
|
|
fdbcdr_wr(fdc, 0, count); /* needed? */
|
|
}
|
|
}
|
|
|
|
static int
|
|
fdc_biodone(struct fdc_data *fdc, int error)
|
|
{
|
|
struct fd_data *fd;
|
|
struct bio *bp;
|
|
|
|
fd = fdc->fd;
|
|
bp = fdc->bp;
|
|
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
if (--fd->fd_iocount == 0)
|
|
callout_reset(&fd->toffhandle, 4 * hz, fd_turnoff, fd);
|
|
fdc->bp = NULL;
|
|
fdc->fd = NULL;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
if (bp->bio_to != NULL) {
|
|
if ((debugflags & 2) && fd->fdc->retry > 0)
|
|
printf("retries: %d\n", fd->fdc->retry);
|
|
g_io_deliver(bp, error);
|
|
return (0);
|
|
}
|
|
bp->bio_error = error;
|
|
bp->bio_flags |= BIO_DONE;
|
|
wakeup(bp);
|
|
return (0);
|
|
}
|
|
|
|
static int retry_line;
|
|
|
|
static int
|
|
fdc_worker(struct fdc_data *fdc)
|
|
{
|
|
struct fd_data *fd;
|
|
struct bio *bp;
|
|
int i, nsect;
|
|
int st0, st3, cyl, mfm, steptrac, cylinder, descyl, sec;
|
|
int head;
|
|
int override_error;
|
|
static int need_recal;
|
|
struct fdc_readid *idp;
|
|
struct fd_formb *finfo;
|
|
|
|
override_error = 0;
|
|
|
|
/* Have we exhausted our retries ? */
|
|
bp = fdc->bp;
|
|
fd = fdc->fd;
|
|
if (bp != NULL &&
|
|
(fdc->retry >= retries || (fd->options & FDOPT_NORETRY))) {
|
|
if ((debugflags & 4))
|
|
printf("Too many retries (EIO)\n");
|
|
if (fdc->flags & FDC_NEEDS_RESET) {
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags |= FD_EMPTY;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
}
|
|
return (fdc_biodone(fdc, EIO));
|
|
}
|
|
|
|
/* Disable ISADMA if we bailed while it was active */
|
|
if (fd != NULL && (fd->flags & FD_ISADMA)) {
|
|
isa_dmadone(
|
|
bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
|
|
fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags &= ~FD_ISADMA;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
}
|
|
|
|
/* Unwedge the controller ? */
|
|
if (fdc->flags & FDC_NEEDS_RESET) {
|
|
fdc->flags &= ~FDC_NEEDS_RESET;
|
|
fdc_reset(fdc);
|
|
if (cold)
|
|
DELAY(1000000);
|
|
else
|
|
tsleep(fdc, PRIBIO, "fdcrst", hz);
|
|
/* Discard results */
|
|
for (i = 0; i < 4; i++)
|
|
fdc_sense_int(fdc, &st0, &cyl);
|
|
/* All drives must recal */
|
|
need_recal = 0xf;
|
|
}
|
|
|
|
/* Pick up a request, if need be wait for it */
|
|
if (fdc->bp == NULL) {
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
do {
|
|
fdc->bp = bioq_takefirst(&fdc->head);
|
|
if (fdc->bp == NULL)
|
|
msleep(&fdc->head, &fdc->fdc_mtx,
|
|
PRIBIO, "-", 0);
|
|
} while (fdc->bp == NULL &&
|
|
(fdc->flags & FDC_KTHREAD_EXIT) == 0);
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
|
|
if (fdc->bp == NULL)
|
|
/*
|
|
* Nothing to do, worker thread has been
|
|
* requested to stop.
|
|
*/
|
|
return (0);
|
|
|
|
bp = fdc->bp;
|
|
fd = fdc->fd = bp->bio_driver1;
|
|
fdc->retry = 0;
|
|
fd->fd_ioptr = bp->bio_data;
|
|
if (bp->bio_cmd == BIO_FMT) {
|
|
i = offsetof(struct fd_formb, fd_formb_cylno(0));
|
|
fd->fd_ioptr += i;
|
|
fd->fd_iosize = bp->bio_length - i;
|
|
}
|
|
}
|
|
|
|
/* Select drive, setup params */
|
|
fd_select(fd);
|
|
if (fdc->fdct == FDC_ENHANCED)
|
|
fddsr_wr(fdc, fd->ft->trans);
|
|
else
|
|
fdctl_wr(fdc, fd->ft->trans);
|
|
|
|
if (bp->bio_cmd == BIO_PROBE) {
|
|
if ((!(device_get_flags(fd->dev) & FD_NO_CHLINE) &&
|
|
!(fdin_rd(fdc) & FDI_DCHG) &&
|
|
!(fd->flags & FD_EMPTY)) ||
|
|
fd_probe_disk(fd, &need_recal) == 0)
|
|
return (fdc_biodone(fdc, 0));
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* If we are dead just flush the requests
|
|
*/
|
|
if (fd->flags & FD_EMPTY)
|
|
return (fdc_biodone(fdc, ENXIO));
|
|
|
|
/* Check if we lost our media */
|
|
if (fdin_rd(fdc) & FDI_DCHG) {
|
|
if (debugflags & 0x40)
|
|
printf("Lost disk\n");
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags |= FD_EMPTY;
|
|
fd->flags |= FD_NEWDISK;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
g_topology_lock();
|
|
g_orphan_provider(fd->fd_provider, ENXIO);
|
|
fd->fd_provider->flags |= G_PF_WITHER;
|
|
fd->fd_provider =
|
|
g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
|
|
g_error_provider(fd->fd_provider, 0);
|
|
g_topology_unlock();
|
|
return (fdc_biodone(fdc, ENXIO));
|
|
}
|
|
|
|
/* Check if the floppy is write-protected */
|
|
if (bp->bio_cmd == BIO_FMT || bp->bio_cmd == BIO_WRITE) {
|
|
retry_line = __LINE__;
|
|
if(fdc_sense_drive(fdc, &st3) != 0)
|
|
return (1);
|
|
if(st3 & NE7_ST3_WP)
|
|
return (fdc_biodone(fdc, EROFS));
|
|
}
|
|
|
|
mfm = (fd->ft->flags & FL_MFM)? NE7CMD_MFM: 0;
|
|
steptrac = (fd->ft->flags & FL_2STEP)? 2: 1;
|
|
i = fd->ft->sectrac * fd->ft->heads;
|
|
cylinder = bp->bio_pblkno / i;
|
|
descyl = cylinder * steptrac;
|
|
sec = bp->bio_pblkno % i;
|
|
nsect = i - sec;
|
|
head = sec / fd->ft->sectrac;
|
|
sec = sec % fd->ft->sectrac + 1;
|
|
|
|
/* If everything is going swimmingly, use multisector xfer */
|
|
if (fdc->retry == 0 &&
|
|
(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
|
|
fd->fd_iosize = imin(nsect * fd->sectorsize, bp->bio_resid);
|
|
nsect = fd->fd_iosize / fd->sectorsize;
|
|
} else if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
|
|
fd->fd_iosize = fd->sectorsize;
|
|
nsect = 1;
|
|
}
|
|
|
|
/* Do RECAL if we need to or are going to track zero anyway */
|
|
if ((need_recal & (1 << fd->fdsu)) ||
|
|
(cylinder == 0 && fd->track != 0) ||
|
|
fdc->retry > 2) {
|
|
retry_line = __LINE__;
|
|
if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
|
|
return (1);
|
|
tsleep(fdc, PRIBIO, "fdrecal", hz);
|
|
retry_line = __LINE__;
|
|
if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
|
|
return (1); /* XXX */
|
|
retry_line = __LINE__;
|
|
if ((st0 & 0xc0) || cyl != 0)
|
|
return (1);
|
|
need_recal &= ~(1 << fd->fdsu);
|
|
fd->track = 0;
|
|
/* let the heads settle */
|
|
if (settle)
|
|
tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
|
|
}
|
|
|
|
/*
|
|
* SEEK to where we want to be
|
|
*/
|
|
if (cylinder != fd->track) {
|
|
retry_line = __LINE__;
|
|
if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, descyl, 0))
|
|
return (1);
|
|
tsleep(fdc, PRIBIO, "fdseek", hz);
|
|
retry_line = __LINE__;
|
|
if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
|
|
return (1); /* XXX */
|
|
retry_line = __LINE__;
|
|
if ((st0 & 0xc0) || cyl != descyl) {
|
|
need_recal |= (1 << fd->fdsu);
|
|
return (1);
|
|
}
|
|
/* let the heads settle */
|
|
if (settle)
|
|
tsleep(fdc->fd, PRIBIO, "fdhdstl", settle);
|
|
}
|
|
fd->track = cylinder;
|
|
|
|
if (debugflags & 8)
|
|
printf("op %x bn %ju siz %u ptr %p retry %d\n",
|
|
bp->bio_cmd, bp->bio_pblkno, fd->fd_iosize,
|
|
fd->fd_ioptr, fdc->retry);
|
|
|
|
/* Setup ISADMA if we need it and have it */
|
|
if ((bp->bio_cmd == BIO_READ ||
|
|
bp->bio_cmd == BIO_WRITE ||
|
|
bp->bio_cmd == BIO_FMT)
|
|
&& !(fdc->flags & FDC_NODMA)) {
|
|
isa_dmastart(
|
|
bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
|
|
fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags |= FD_ISADMA;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
}
|
|
|
|
/* Do PIO if we have to */
|
|
if (fdc->flags & FDC_NODMA) {
|
|
if (bp->bio_cmd == BIO_READ ||
|
|
bp->bio_cmd == BIO_WRITE ||
|
|
bp->bio_cmd == BIO_FMT)
|
|
fdbcdr_wr(fdc, 1, fd->fd_iosize);
|
|
if (bp->bio_cmd == BIO_WRITE ||
|
|
bp->bio_cmd == BIO_FMT)
|
|
fdc_pio(fdc);
|
|
}
|
|
|
|
switch(bp->bio_cmd) {
|
|
case BIO_FMT:
|
|
/* formatting */
|
|
finfo = (struct fd_formb *)bp->bio_data;
|
|
retry_line = __LINE__;
|
|
if (fdc_cmd(fdc, 6,
|
|
NE7CMD_FORMAT | mfm,
|
|
head << 2 | fd->fdsu,
|
|
finfo->fd_formb_secshift,
|
|
finfo->fd_formb_nsecs,
|
|
finfo->fd_formb_gaplen,
|
|
finfo->fd_formb_fillbyte, 0))
|
|
return (1);
|
|
break;
|
|
case BIO_RDID:
|
|
retry_line = __LINE__;
|
|
if (fdc_cmd(fdc, 2,
|
|
NE7CMD_READID | mfm,
|
|
head << 2 | fd->fdsu, 0))
|
|
return (1);
|
|
break;
|
|
case BIO_READ:
|
|
retry_line = __LINE__;
|
|
if (fdc_cmd(fdc, 9,
|
|
NE7CMD_READ | NE7CMD_SK | mfm | NE7CMD_MT,
|
|
head << 2 | fd->fdsu, /* head & unit */
|
|
fd->track, /* track */
|
|
head, /* head */
|
|
sec, /* sector + 1 */
|
|
fd->ft->secsize, /* sector size */
|
|
fd->ft->sectrac, /* sectors/track */
|
|
fd->ft->gap, /* gap size */
|
|
fd->ft->datalen, /* data length */
|
|
0))
|
|
return (1);
|
|
break;
|
|
case BIO_WRITE:
|
|
retry_line = __LINE__;
|
|
if (fdc_cmd(fdc, 9,
|
|
NE7CMD_WRITE | mfm | NE7CMD_MT,
|
|
head << 2 | fd->fdsu, /* head & unit */
|
|
fd->track, /* track */
|
|
head, /* head */
|
|
sec, /* sector + 1 */
|
|
fd->ft->secsize, /* sector size */
|
|
fd->ft->sectrac, /* sectors/track */
|
|
fd->ft->gap, /* gap size */
|
|
fd->ft->datalen, /* data length */
|
|
0))
|
|
return (1);
|
|
break;
|
|
default:
|
|
KASSERT(0 == 1, ("Wrong bio_cmd %x\n", bp->bio_cmd));
|
|
}
|
|
|
|
/* Wait for interrupt */
|
|
i = tsleep(fdc, PRIBIO, "fddata", hz);
|
|
|
|
/* PIO if the read looks good */
|
|
if (i == 0 && (fdc->flags & FDC_NODMA) && (bp->bio_cmd == BIO_READ))
|
|
fdc_pio(fdc);
|
|
|
|
/* Finish DMA */
|
|
if (fd->flags & FD_ISADMA) {
|
|
isa_dmadone(
|
|
bp->bio_cmd == BIO_READ ? ISADMA_READ : ISADMA_WRITE,
|
|
fd->fd_ioptr, fd->fd_iosize, fdc->dmachan);
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags &= ~FD_ISADMA;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
}
|
|
|
|
if (i != 0) {
|
|
/*
|
|
* Timeout.
|
|
*
|
|
* Due to IBM's brain-dead design, the FDC has a faked ready
|
|
* signal, hardwired to ready == true. Thus, any command
|
|
* issued if there's no diskette in the drive will _never_
|
|
* complete, and must be aborted by resetting the FDC.
|
|
* Many thanks, Big Blue!
|
|
*/
|
|
retry_line = __LINE__;
|
|
fdc->flags |= FDC_NEEDS_RESET;
|
|
return (1);
|
|
}
|
|
|
|
retry_line = __LINE__;
|
|
if (fdc_read_status(fdc))
|
|
return (1);
|
|
|
|
if (debugflags & 0x10)
|
|
printf(" -> %x %x %x %x\n",
|
|
fdc->status[0], fdc->status[1],
|
|
fdc->status[2], fdc->status[3]);
|
|
|
|
st0 = fdc->status[0] & NE7_ST0_IC;
|
|
if (st0 != 0) {
|
|
retry_line = __LINE__;
|
|
if (st0 == NE7_ST0_IC_AT && fdc->status[1] & NE7_ST1_OR) {
|
|
/*
|
|
* DMA overrun. Someone hogged the bus and
|
|
* didn't release it in time for the next
|
|
* FDC transfer.
|
|
*/
|
|
return (1);
|
|
}
|
|
retry_line = __LINE__;
|
|
if(st0 == NE7_ST0_IC_IV) {
|
|
fdc->flags |= FDC_NEEDS_RESET;
|
|
return (1);
|
|
}
|
|
retry_line = __LINE__;
|
|
if(st0 == NE7_ST0_IC_AT && fdc->status[2] & NE7_ST2_WC) {
|
|
need_recal |= (1 << fd->fdsu);
|
|
return (1);
|
|
}
|
|
if (debugflags & 0x20) {
|
|
printf("status %02x %02x %02x %02x %02x %02x\n",
|
|
fdc->status[0], fdc->status[1], fdc->status[2],
|
|
fdc->status[3], fdc->status[4], fdc->status[5]);
|
|
}
|
|
retry_line = __LINE__;
|
|
if (fd->options & FDOPT_NOERROR)
|
|
override_error = 1;
|
|
else
|
|
return (1);
|
|
}
|
|
/* All OK */
|
|
switch(bp->bio_cmd) {
|
|
case BIO_RDID:
|
|
/* copy out ID field contents */
|
|
idp = (struct fdc_readid *)bp->bio_data;
|
|
idp->cyl = fdc->status[3];
|
|
idp->head = fdc->status[4];
|
|
idp->sec = fdc->status[5];
|
|
idp->secshift = fdc->status[6];
|
|
if (debugflags & 0x40)
|
|
printf("c %d h %d s %d z %d\n",
|
|
idp->cyl, idp->head, idp->sec, idp->secshift);
|
|
break;
|
|
case BIO_READ:
|
|
case BIO_WRITE:
|
|
bp->bio_pblkno += nsect;
|
|
bp->bio_resid -= fd->fd_iosize;
|
|
bp->bio_completed += fd->fd_iosize;
|
|
fd->fd_ioptr += fd->fd_iosize;
|
|
if (override_error) {
|
|
if ((debugflags & 4))
|
|
printf("FDOPT_NOERROR: returning bad data\n");
|
|
} else {
|
|
/* Since we managed to get something done,
|
|
* reset the retry */
|
|
fdc->retry = 0;
|
|
if (bp->bio_resid > 0)
|
|
return (0);
|
|
}
|
|
break;
|
|
case BIO_FMT:
|
|
break;
|
|
}
|
|
return (fdc_biodone(fdc, 0));
|
|
}
|
|
|
|
static void
|
|
fdc_thread(void *arg)
|
|
{
|
|
struct fdc_data *fdc;
|
|
|
|
fdc = arg;
|
|
int i;
|
|
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fdc->flags |= FDC_KTHREAD_ALIVE;
|
|
while ((fdc->flags & FDC_KTHREAD_EXIT) == 0) {
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
i = fdc_worker(fdc);
|
|
if (i && debugflags & 0x20) {
|
|
if (fdc->bp != NULL)
|
|
g_print_bio("", fdc->bp, "");
|
|
printf("Retry line %d\n", retry_line);
|
|
}
|
|
fdc->retry += i;
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
}
|
|
fdc->flags &= ~(FDC_KTHREAD_EXIT | FDC_KTHREAD_ALIVE);
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
|
|
kproc_exit(0);
|
|
}
|
|
|
|
/*
|
|
* Enqueue a request.
|
|
*/
|
|
static void
|
|
fd_enqueue(struct fd_data *fd, struct bio *bp)
|
|
{
|
|
struct fdc_data *fdc;
|
|
|
|
fdc = fd->fdc;
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
/* If we go from idle, cancel motor turnoff */
|
|
if (fd->fd_iocount++ == 0)
|
|
callout_stop(&fd->toffhandle);
|
|
if (fd->flags & FD_MOTOR) {
|
|
/* The motor is on, send it directly to the controller */
|
|
bioq_disksort(&fdc->head, bp);
|
|
wakeup(&fdc->head);
|
|
} else {
|
|
/* Queue it on the drive until the motor has started */
|
|
bioq_insert_tail(&fd->fd_bq, bp);
|
|
if (!(fd->flags & FD_MOTORWAIT))
|
|
fd_motor(fd, 1);
|
|
}
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
}
|
|
|
|
/*
|
|
* Try to find out if we have a disk in the drive.
|
|
*/
|
|
static int
|
|
fd_probe_disk(struct fd_data *fd, int *recal)
|
|
{
|
|
struct fdc_data *fdc;
|
|
int st0, st3, cyl;
|
|
int oopts, ret;
|
|
|
|
fdc = fd->fdc;
|
|
oopts = fd->options;
|
|
fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
|
|
ret = 1;
|
|
|
|
/*
|
|
* First recal, then seek to cyl#1, this clears the old condition on
|
|
* the disk change line so we can examine it for current status.
|
|
*/
|
|
if (debugflags & 0x40)
|
|
printf("New disk in probe\n");
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags |= FD_NEWDISK;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fd->fdsu, 0))
|
|
goto done;
|
|
tsleep(fdc, PRIBIO, "fdrecal", hz);
|
|
if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
|
|
goto done; /* XXX */
|
|
if ((st0 & 0xc0) || cyl != 0)
|
|
goto done;
|
|
|
|
/* Seek to track 1 */
|
|
if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fd->fdsu, 1, 0))
|
|
goto done;
|
|
tsleep(fdc, PRIBIO, "fdseek", hz);
|
|
if (fdc_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
|
|
goto done; /* XXX */
|
|
*recal |= (1 << fd->fdsu);
|
|
if (fdin_rd(fdc) & FDI_DCHG) {
|
|
if (debugflags & 0x40)
|
|
printf("Empty in probe\n");
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags |= FD_EMPTY;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
} else {
|
|
if (fdc_sense_drive(fdc, &st3) != 0)
|
|
goto done;
|
|
if (debugflags & 0x40)
|
|
printf("Got disk in probe\n");
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags &= ~FD_EMPTY;
|
|
if (st3 & NE7_ST3_WP)
|
|
fd->flags |= FD_WP;
|
|
else
|
|
fd->flags &= ~FD_WP;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
}
|
|
ret = 0;
|
|
|
|
done:
|
|
fd->options = oopts;
|
|
return (ret);
|
|
}
|
|
|
|
static int
|
|
fdmisccmd(struct fd_data *fd, u_int cmd, void *data)
|
|
{
|
|
struct bio *bp;
|
|
struct fd_formb *finfo;
|
|
struct fdc_readid *idfield;
|
|
int error;
|
|
|
|
bp = malloc(sizeof(struct bio), M_TEMP, M_WAITOK | M_ZERO);
|
|
|
|
/*
|
|
* Set up a bio request for fdstrategy(). bio_offset is faked
|
|
* so that fdstrategy() will seek to the requested
|
|
* cylinder, and use the desired head.
|
|
*/
|
|
bp->bio_cmd = cmd;
|
|
if (cmd == BIO_FMT) {
|
|
finfo = (struct fd_formb *)data;
|
|
bp->bio_pblkno =
|
|
(finfo->cyl * fd->ft->heads + finfo->head) *
|
|
fd->ft->sectrac;
|
|
bp->bio_length = sizeof *finfo;
|
|
} else if (cmd == BIO_RDID) {
|
|
idfield = (struct fdc_readid *)data;
|
|
bp->bio_pblkno =
|
|
(idfield->cyl * fd->ft->heads + idfield->head) *
|
|
fd->ft->sectrac;
|
|
bp->bio_length = sizeof(struct fdc_readid);
|
|
} else if (cmd == BIO_PROBE) {
|
|
/* nothing */
|
|
} else
|
|
panic("wrong cmd in fdmisccmd()");
|
|
bp->bio_offset = bp->bio_pblkno * fd->sectorsize;
|
|
bp->bio_data = data;
|
|
bp->bio_driver1 = fd;
|
|
bp->bio_flags = 0;
|
|
|
|
fd_enqueue(fd, bp);
|
|
|
|
do {
|
|
tsleep(bp, PRIBIO, "fdwait", hz);
|
|
} while (!(bp->bio_flags & BIO_DONE));
|
|
error = bp->bio_error;
|
|
|
|
free(bp, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Try figuring out the density of the media present in our device.
|
|
*/
|
|
static int
|
|
fdautoselect(struct fd_data *fd)
|
|
{
|
|
struct fd_type *fdtp;
|
|
struct fdc_readid id;
|
|
int oopts, rv;
|
|
|
|
if (!(fd->ft->flags & FL_AUTO))
|
|
return (0);
|
|
|
|
fdtp = fd_native_types[fd->type];
|
|
fdsettype(fd, fdtp);
|
|
if (!(fd->ft->flags & FL_AUTO))
|
|
return (0);
|
|
|
|
/*
|
|
* Try reading sector ID fields, first at cylinder 0, head 0,
|
|
* then at cylinder 2, head N. We don't probe cylinder 1,
|
|
* since for 5.25in DD media in a HD drive, there are no data
|
|
* to read (2 step pulses per media cylinder required). For
|
|
* two-sided media, the second probe always goes to head 1, so
|
|
* we can tell them apart from single-sided media. As a
|
|
* side-effect this means that single-sided media should be
|
|
* mentioned in the search list after two-sided media of an
|
|
* otherwise identical density. Media with a different number
|
|
* of sectors per track but otherwise identical parameters
|
|
* cannot be distinguished at all.
|
|
*
|
|
* If we successfully read an ID field on both cylinders where
|
|
* the recorded values match our expectation, we are done.
|
|
* Otherwise, we try the next density entry from the table.
|
|
*
|
|
* Stepping to cylinder 2 has the side-effect of clearing the
|
|
* unit attention bit.
|
|
*/
|
|
oopts = fd->options;
|
|
fd->options |= FDOPT_NOERRLOG | FDOPT_NORETRY;
|
|
for (; fdtp->heads; fdtp++) {
|
|
fdsettype(fd, fdtp);
|
|
|
|
id.cyl = id.head = 0;
|
|
rv = fdmisccmd(fd, BIO_RDID, &id);
|
|
if (rv != 0)
|
|
continue;
|
|
if (id.cyl != 0 || id.head != 0 || id.secshift != fdtp->secsize)
|
|
continue;
|
|
id.cyl = 2;
|
|
id.head = fd->ft->heads - 1;
|
|
rv = fdmisccmd(fd, BIO_RDID, &id);
|
|
if (id.cyl != 2 || id.head != fdtp->heads - 1 ||
|
|
id.secshift != fdtp->secsize)
|
|
continue;
|
|
if (rv == 0)
|
|
break;
|
|
}
|
|
|
|
fd->options = oopts;
|
|
if (fdtp->heads == 0) {
|
|
if (debugflags & 0x40)
|
|
device_printf(fd->dev, "autoselection failed\n");
|
|
fdsettype(fd, fd_native_types[fd->type]);
|
|
return (-1);
|
|
} else {
|
|
if (debugflags & 0x40) {
|
|
device_printf(fd->dev,
|
|
"autoselected %d KB medium\n",
|
|
fd->ft->size / 2);
|
|
fdprinttype(fd->ft);
|
|
}
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* GEOM class implementation
|
|
*/
|
|
|
|
static g_access_t fd_access;
|
|
static g_start_t fd_start;
|
|
static g_ioctl_t fd_ioctl;
|
|
static g_provgone_t fd_providergone;
|
|
|
|
struct g_class g_fd_class = {
|
|
.name = "FD",
|
|
.version = G_VERSION,
|
|
.start = fd_start,
|
|
.access = fd_access,
|
|
.ioctl = fd_ioctl,
|
|
.providergone = fd_providergone,
|
|
};
|
|
|
|
static int
|
|
fd_access(struct g_provider *pp, int r, int w, int e)
|
|
{
|
|
struct fd_data *fd;
|
|
struct fdc_data *fdc;
|
|
int ar, aw, ae;
|
|
|
|
fd = pp->geom->softc;
|
|
fdc = fd->fdc;
|
|
|
|
/*
|
|
* If our provider is withering, we can only get negative requests
|
|
* and we don't want to even see them
|
|
*/
|
|
if (pp->flags & G_PF_WITHER)
|
|
return (0);
|
|
|
|
ar = r + pp->acr;
|
|
aw = w + pp->acw;
|
|
ae = e + pp->ace;
|
|
|
|
if (ar == 0 && aw == 0 && ae == 0) {
|
|
fd->options &= ~(FDOPT_NORETRY | FDOPT_NOERRLOG | FDOPT_NOERROR);
|
|
return (0);
|
|
}
|
|
|
|
if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) {
|
|
if (fdmisccmd(fd, BIO_PROBE, NULL))
|
|
return (ENXIO);
|
|
if (fd->flags & FD_EMPTY)
|
|
return (ENXIO);
|
|
if (fd->flags & FD_NEWDISK) {
|
|
if (fdautoselect(fd) != 0 &&
|
|
(device_get_flags(fd->dev) & FD_NO_CHLINE)) {
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags |= FD_EMPTY;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
return (ENXIO);
|
|
}
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fd->flags &= ~FD_NEWDISK;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
}
|
|
}
|
|
|
|
if (w > 0 && (fd->flags & FD_WP)) {
|
|
return (EROFS);
|
|
}
|
|
|
|
pp->sectorsize = fd->sectorsize;
|
|
pp->stripesize = fd->ft->heads * fd->ft->sectrac * fd->sectorsize;
|
|
pp->mediasize = pp->stripesize * fd->ft->tracks;
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
fd_start(struct bio *bp)
|
|
{
|
|
struct fd_data * fd;
|
|
|
|
fd = bp->bio_to->geom->softc;
|
|
bp->bio_driver1 = fd;
|
|
if (bp->bio_cmd == BIO_GETATTR) {
|
|
if (g_handleattr_int(bp, "GEOM::fwsectors", fd->ft->sectrac))
|
|
return;
|
|
if (g_handleattr_int(bp, "GEOM::fwheads", fd->ft->heads))
|
|
return;
|
|
g_io_deliver(bp, ENOIOCTL);
|
|
return;
|
|
}
|
|
if (!(bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE)) {
|
|
g_io_deliver(bp, EOPNOTSUPP);
|
|
return;
|
|
}
|
|
bp->bio_pblkno = bp->bio_offset / fd->sectorsize;
|
|
bp->bio_resid = bp->bio_length;
|
|
fd_enqueue(fd, bp);
|
|
return;
|
|
}
|
|
|
|
static int
|
|
fd_ioctl(struct g_provider *pp, u_long cmd, void *data, int fflag, struct thread *td)
|
|
{
|
|
struct fd_data *fd;
|
|
struct fdc_status *fsp;
|
|
struct fdc_readid *rid;
|
|
int error;
|
|
|
|
fd = pp->geom->softc;
|
|
|
|
switch (cmd) {
|
|
case FD_GTYPE: /* get drive type */
|
|
*(struct fd_type *)data = *fd->ft;
|
|
return (0);
|
|
|
|
case FD_STYPE: /* set drive type */
|
|
/*
|
|
* Allow setting drive type temporarily iff
|
|
* currently unset. Used for fdformat so any
|
|
* user can set it, and then start formatting.
|
|
*/
|
|
fd->fts = *(struct fd_type *)data;
|
|
if (fd->fts.sectrac) {
|
|
/* XXX: check for rubbish */
|
|
fdsettype(fd, &fd->fts);
|
|
} else {
|
|
fdsettype(fd, fd_native_types[fd->type]);
|
|
}
|
|
if (debugflags & 0x40)
|
|
fdprinttype(fd->ft);
|
|
return (0);
|
|
|
|
case FD_GOPTS: /* get drive options */
|
|
*(int *)data = fd->options;
|
|
return (0);
|
|
|
|
case FD_SOPTS: /* set drive options */
|
|
fd->options = *(int *)data;
|
|
return (0);
|
|
|
|
case FD_CLRERR:
|
|
error = priv_check(td, PRIV_DRIVER);
|
|
if (error)
|
|
return (error);
|
|
fd->fdc->fdc_errs = 0;
|
|
return (0);
|
|
|
|
case FD_GSTAT:
|
|
fsp = (struct fdc_status *)data;
|
|
if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
|
|
return (EINVAL);
|
|
memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
|
|
return (0);
|
|
|
|
case FD_GDTYPE:
|
|
*(enum fd_drivetype *)data = fd->type;
|
|
return (0);
|
|
|
|
case FD_FORM:
|
|
if (!(fflag & FWRITE))
|
|
return (EPERM);
|
|
if (((struct fd_formb *)data)->format_version !=
|
|
FD_FORMAT_VERSION)
|
|
return (EINVAL); /* wrong version of formatting prog */
|
|
error = fdmisccmd(fd, BIO_FMT, data);
|
|
mtx_lock(&fd->fdc->fdc_mtx);
|
|
fd->flags |= FD_NEWDISK;
|
|
mtx_unlock(&fd->fdc->fdc_mtx);
|
|
break;
|
|
|
|
case FD_READID:
|
|
rid = (struct fdc_readid *)data;
|
|
if (rid->cyl > 85 || rid->head > 1)
|
|
return (EINVAL);
|
|
error = fdmisccmd(fd, BIO_RDID, data);
|
|
break;
|
|
|
|
case FIONBIO:
|
|
case FIOASYNC:
|
|
/* For backwards compat with old fd*(8) tools */
|
|
error = 0;
|
|
break;
|
|
|
|
default:
|
|
if (debugflags & 0x80)
|
|
printf("Unknown ioctl %lx\n", cmd);
|
|
error = ENOIOCTL;
|
|
break;
|
|
}
|
|
return (error);
|
|
};
|
|
|
|
/*
|
|
* Configuration/initialization stuff, per controller.
|
|
*/
|
|
struct fdc_ivars {
|
|
int fdunit;
|
|
int fdtype;
|
|
};
|
|
|
|
void
|
|
fdc_release_resources(struct fdc_data *fdc)
|
|
{
|
|
device_t dev;
|
|
struct resource *last;
|
|
int i;
|
|
|
|
dev = fdc->fdc_dev;
|
|
if (fdc->fdc_intr)
|
|
bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
|
|
fdc->fdc_intr = NULL;
|
|
if (fdc->res_irq != NULL)
|
|
bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
|
|
fdc->res_irq);
|
|
fdc->res_irq = NULL;
|
|
last = NULL;
|
|
for (i = 0; i < FDC_MAXREG; i++) {
|
|
if (fdc->resio[i] != NULL && fdc->resio[i] != last) {
|
|
bus_release_resource(dev, SYS_RES_IOPORT,
|
|
fdc->ridio[i], fdc->resio[i]);
|
|
last = fdc->resio[i];
|
|
fdc->resio[i] = NULL;
|
|
}
|
|
}
|
|
if (fdc->res_drq != NULL)
|
|
bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
|
|
fdc->res_drq);
|
|
fdc->res_drq = NULL;
|
|
}
|
|
|
|
int
|
|
fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
|
|
{
|
|
struct fdc_ivars *ivars = device_get_ivars(child);
|
|
|
|
switch (which) {
|
|
case FDC_IVAR_FDUNIT:
|
|
*result = ivars->fdunit;
|
|
break;
|
|
case FDC_IVAR_FDTYPE:
|
|
*result = ivars->fdtype;
|
|
break;
|
|
default:
|
|
return (ENOENT);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fdc_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
|
|
{
|
|
struct fdc_ivars *ivars = device_get_ivars(child);
|
|
|
|
switch (which) {
|
|
case FDC_IVAR_FDUNIT:
|
|
ivars->fdunit = value;
|
|
break;
|
|
case FDC_IVAR_FDTYPE:
|
|
ivars->fdtype = value;
|
|
break;
|
|
default:
|
|
return (ENOENT);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fdc_initial_reset(device_t dev, struct fdc_data *fdc)
|
|
{
|
|
int ic_type, part_id;
|
|
|
|
/*
|
|
* A status value of 0xff is very unlikely, but not theoretically
|
|
* impossible, but it is far more likely to indicate an empty bus.
|
|
*/
|
|
if (fdsts_rd(fdc) == 0xff)
|
|
return (ENXIO);
|
|
|
|
/*
|
|
* Assert a reset to the floppy controller and check that the status
|
|
* register goes to zero.
|
|
*/
|
|
fdout_wr(fdc, 0);
|
|
fdout_wr(fdc, 0);
|
|
if (fdsts_rd(fdc) != 0)
|
|
return (ENXIO);
|
|
|
|
/*
|
|
* Clear the reset and see it come ready.
|
|
*/
|
|
fdout_wr(fdc, FDO_FRST);
|
|
DELAY(100);
|
|
if (fdsts_rd(fdc) != 0x80)
|
|
return (ENXIO);
|
|
|
|
/* Then, see if it can handle a command. */
|
|
if (fdc_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(6, 240),
|
|
NE7_SPEC_2(31, 0), 0))
|
|
return (ENXIO);
|
|
|
|
/*
|
|
* Try to identify the chip.
|
|
*
|
|
* The i8272 datasheet documents that unknown commands
|
|
* will return ST0 as 0x80. The i8272 is supposedly identical
|
|
* to the NEC765.
|
|
* The i82077SL datasheet says 0x90 for the VERSION command,
|
|
* and several "superio" chips emulate this.
|
|
*/
|
|
if (fdc_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type))
|
|
return (ENXIO);
|
|
if (fdc_cmd(fdc, 1, 0x18, 1, &part_id))
|
|
return (ENXIO);
|
|
if (bootverbose)
|
|
device_printf(dev,
|
|
"ic_type %02x part_id %02x\n", ic_type, part_id);
|
|
switch (ic_type & 0xff) {
|
|
case 0x80:
|
|
device_set_desc(dev, "NEC 765 or clone");
|
|
fdc->fdct = FDC_NE765;
|
|
break;
|
|
case 0x81:
|
|
case 0x90:
|
|
device_set_desc(dev,
|
|
"Enhanced floppy controller");
|
|
fdc->fdct = FDC_ENHANCED;
|
|
break;
|
|
default:
|
|
device_set_desc(dev, "Generic floppy controller");
|
|
fdc->fdct = FDC_UNKNOWN;
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fdc_detach(device_t dev)
|
|
{
|
|
struct fdc_data *fdc;
|
|
int error;
|
|
|
|
fdc = device_get_softc(dev);
|
|
|
|
/* have our children detached first */
|
|
if ((error = bus_generic_detach(dev)))
|
|
return (error);
|
|
|
|
if (fdc->fdc_intr)
|
|
bus_teardown_intr(dev, fdc->res_irq, fdc->fdc_intr);
|
|
fdc->fdc_intr = NULL;
|
|
|
|
/* kill worker thread */
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
fdc->flags |= FDC_KTHREAD_EXIT;
|
|
wakeup(&fdc->head);
|
|
while ((fdc->flags & FDC_KTHREAD_ALIVE) != 0)
|
|
msleep(fdc->fdc_thread, &fdc->fdc_mtx, PRIBIO, "fdcdet", 0);
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
|
|
/* reset controller, turn motor off */
|
|
fdout_wr(fdc, 0);
|
|
|
|
if (!(fdc->flags & FDC_NODMA))
|
|
isa_dma_release(fdc->dmachan);
|
|
fdc_release_resources(fdc);
|
|
mtx_destroy(&fdc->fdc_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Add a child device to the fdc controller. It will then be probed etc.
|
|
*/
|
|
device_t
|
|
fdc_add_child(device_t dev, const char *name, int unit)
|
|
{
|
|
struct fdc_ivars *ivar;
|
|
device_t child;
|
|
|
|
ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
|
|
if (ivar == NULL)
|
|
return (NULL);
|
|
child = device_add_child(dev, name, unit);
|
|
if (child == NULL) {
|
|
free(ivar, M_DEVBUF);
|
|
return (NULL);
|
|
}
|
|
device_set_ivars(child, ivar);
|
|
ivar->fdunit = unit;
|
|
ivar->fdtype = FDT_NONE;
|
|
if (resource_disabled(name, unit))
|
|
device_disable(child);
|
|
return (child);
|
|
}
|
|
|
|
int
|
|
fdc_attach(device_t dev)
|
|
{
|
|
struct fdc_data *fdc;
|
|
int error;
|
|
|
|
fdc = device_get_softc(dev);
|
|
fdc->fdc_dev = dev;
|
|
error = fdc_initial_reset(dev, fdc);
|
|
if (error) {
|
|
device_printf(dev, "does not respond\n");
|
|
return (error);
|
|
}
|
|
error = bus_setup_intr(dev, fdc->res_irq,
|
|
INTR_TYPE_BIO | INTR_ENTROPY |
|
|
((fdc->flags & FDC_NOFAST) ? INTR_MPSAFE : 0),
|
|
((fdc->flags & FDC_NOFAST) ? NULL : fdc_intr_fast),
|
|
((fdc->flags & FDC_NOFAST) ? fdc_intr : NULL),
|
|
fdc, &fdc->fdc_intr);
|
|
if (error) {
|
|
device_printf(dev, "cannot setup interrupt\n");
|
|
return (error);
|
|
}
|
|
if (!(fdc->flags & FDC_NODMA)) {
|
|
error = isa_dma_acquire(fdc->dmachan);
|
|
if (!error) {
|
|
error = isa_dma_init(fdc->dmachan,
|
|
MAX_BYTES_PER_CYL, M_WAITOK);
|
|
if (error)
|
|
isa_dma_release(fdc->dmachan);
|
|
}
|
|
if (error)
|
|
return (error);
|
|
}
|
|
fdc->fdcu = device_get_unit(dev);
|
|
fdc->flags |= FDC_NEEDS_RESET;
|
|
|
|
mtx_init(&fdc->fdc_mtx, "fdc lock", NULL, MTX_DEF);
|
|
|
|
/* reset controller, turn motor off, clear fdout mirror reg */
|
|
fdout_wr(fdc, fdc->fdout = 0);
|
|
bioq_init(&fdc->head);
|
|
|
|
settle = hz / 8;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
fdc_start_worker(device_t dev)
|
|
{
|
|
struct fdc_data *fdc;
|
|
|
|
fdc = device_get_softc(dev);
|
|
kproc_create(fdc_thread, fdc, &fdc->fdc_thread, 0, 0,
|
|
"fdc%d", device_get_unit(dev));
|
|
}
|
|
|
|
int
|
|
fdc_hints_probe(device_t dev)
|
|
{
|
|
const char *name, *dname;
|
|
int i, error, dunit;
|
|
|
|
/*
|
|
* Probe and attach any children. We should probably detect
|
|
* devices from the BIOS unless overridden.
|
|
*/
|
|
name = device_get_nameunit(dev);
|
|
i = 0;
|
|
while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0) {
|
|
resource_int_value(dname, dunit, "drive", &dunit);
|
|
fdc_add_child(dev, dname, dunit);
|
|
}
|
|
|
|
if ((error = bus_generic_attach(dev)) != 0)
|
|
return (error);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fdc_print_child(device_t me, device_t child)
|
|
{
|
|
int retval = 0, flags;
|
|
|
|
retval += bus_print_child_header(me, child);
|
|
retval += printf(" on %s drive %d", device_get_nameunit(me),
|
|
fdc_get_fdunit(child));
|
|
if ((flags = device_get_flags(me)) != 0)
|
|
retval += printf(" flags %#x", flags);
|
|
retval += printf("\n");
|
|
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* Configuration/initialization, per drive.
|
|
*/
|
|
static int
|
|
fd_probe(device_t dev)
|
|
{
|
|
#if defined(__i386__) || defined(__amd64__)
|
|
int unit;
|
|
#endif
|
|
int i;
|
|
u_int st0, st3;
|
|
struct fd_data *fd;
|
|
struct fdc_data *fdc;
|
|
int fdsu;
|
|
int flags, type;
|
|
|
|
fdsu = fdc_get_fdunit(dev);
|
|
fd = device_get_softc(dev);
|
|
fdc = device_get_softc(device_get_parent(dev));
|
|
flags = device_get_flags(dev);
|
|
|
|
fd->dev = dev;
|
|
fd->fdc = fdc;
|
|
fd->fdsu = fdsu;
|
|
|
|
/* Auto-probe if fdinfo is present, but always allow override. */
|
|
type = flags & FD_TYPEMASK;
|
|
if (type == FDT_NONE && (type = fdc_get_fdtype(dev)) != FDT_NONE) {
|
|
fd->type = type;
|
|
goto done;
|
|
} else {
|
|
/* make sure fdautoselect() will be called */
|
|
fd->flags = FD_EMPTY;
|
|
fd->type = type;
|
|
}
|
|
|
|
#if defined(__i386__) || defined(__amd64__)
|
|
unit = device_get_unit(dev);
|
|
if (fd->type == FDT_NONE && (unit == 0 || unit == 1)) {
|
|
/* Look up what the BIOS thinks we have. */
|
|
if (unit == 0)
|
|
fd->type = (rtcin(RTC_FDISKETTE) & 0xf0) >> 4;
|
|
else
|
|
fd->type = rtcin(RTC_FDISKETTE) & 0x0f;
|
|
if (fd->type == FDT_288M_1)
|
|
fd->type = FDT_288M;
|
|
}
|
|
#endif /* __i386__ || __amd64__ */
|
|
/* is there a unit? */
|
|
if (fd->type == FDT_NONE)
|
|
return (ENXIO);
|
|
|
|
mtx_lock(&fdc->fdc_mtx);
|
|
|
|
/* select it */
|
|
fd_select(fd);
|
|
fd_motor(fd, 1);
|
|
fdc->fd = fd;
|
|
fdc_reset(fdc); /* XXX reset, then unreset, etc. */
|
|
DELAY(1000000); /* 1 sec */
|
|
|
|
if ((flags & FD_NO_PROBE) == 0) {
|
|
/* If we're at track 0 first seek inwards. */
|
|
if ((fdc_sense_drive(fdc, &st3) == 0) &&
|
|
(st3 & NE7_ST3_T0)) {
|
|
/* Seek some steps... */
|
|
if (fdc_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
|
|
/* ...wait a moment... */
|
|
DELAY(300000);
|
|
/* make ctrlr happy: */
|
|
fdc_sense_int(fdc, NULL, NULL);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
/*
|
|
* we must recalibrate twice, just in case the
|
|
* heads have been beyond cylinder 76, since
|
|
* most FDCs still barf when attempting to
|
|
* recalibrate more than 77 steps
|
|
*/
|
|
/* go back to 0: */
|
|
if (fdc_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
|
|
/* a second being enough for full stroke seek*/
|
|
DELAY(i == 0 ? 1000000 : 300000);
|
|
|
|
/* anything responding? */
|
|
if (fdc_sense_int(fdc, &st0, NULL) == 0 &&
|
|
(st0 & NE7_ST0_EC) == 0)
|
|
break; /* already probed successfully */
|
|
}
|
|
}
|
|
}
|
|
|
|
fd_motor(fd, 0);
|
|
fdc->fd = NULL;
|
|
mtx_unlock(&fdc->fdc_mtx);
|
|
|
|
if ((flags & FD_NO_PROBE) == 0 &&
|
|
(st0 & NE7_ST0_EC) != 0) /* no track 0 -> no drive present */
|
|
return (ENXIO);
|
|
|
|
done:
|
|
|
|
switch (fd->type) {
|
|
case FDT_12M:
|
|
device_set_desc(dev, "1200-KB 5.25\" drive");
|
|
break;
|
|
case FDT_144M:
|
|
device_set_desc(dev, "1440-KB 3.5\" drive");
|
|
break;
|
|
case FDT_288M:
|
|
device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
|
|
break;
|
|
case FDT_360K:
|
|
device_set_desc(dev, "360-KB 5.25\" drive");
|
|
break;
|
|
case FDT_720K:
|
|
device_set_desc(dev, "720-KB 3.5\" drive");
|
|
break;
|
|
default:
|
|
return (ENXIO);
|
|
}
|
|
fd->track = FD_NO_TRACK;
|
|
fd->fdc = fdc;
|
|
fd->fdsu = fdsu;
|
|
fd->options = 0;
|
|
callout_init_mtx(&fd->toffhandle, &fd->fdc->fdc_mtx, 0);
|
|
|
|
/* initialize densities for subdevices */
|
|
fdsettype(fd, fd_native_types[fd->type]);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* We have to do this in a geom event because GEOM is not running
|
|
* when fd_attach() is.
|
|
* XXX: move fd_attach after geom like ata/scsi disks
|
|
*/
|
|
static void
|
|
fd_attach2(void *arg, int flag)
|
|
{
|
|
struct fd_data *fd;
|
|
|
|
fd = arg;
|
|
|
|
fd->fd_geom = g_new_geomf(&g_fd_class,
|
|
"fd%d", device_get_unit(fd->dev));
|
|
fd->fd_provider = g_new_providerf(fd->fd_geom, "%s", fd->fd_geom->name);
|
|
fd->fd_geom->softc = fd;
|
|
g_error_provider(fd->fd_provider, 0);
|
|
}
|
|
|
|
static int
|
|
fd_attach(device_t dev)
|
|
{
|
|
struct fd_data *fd;
|
|
|
|
fd = device_get_softc(dev);
|
|
g_post_event(fd_attach2, fd, M_WAITOK, NULL);
|
|
fd->flags |= FD_EMPTY;
|
|
bioq_init(&fd->fd_bq);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
fd_providergone(struct g_provider *pp)
|
|
{
|
|
struct fd_data *fd;
|
|
|
|
fd = pp->geom->softc;
|
|
fd->gone = true;
|
|
wakeup(fd);
|
|
}
|
|
|
|
static void
|
|
fd_detach_geom(void *arg, int flag)
|
|
{
|
|
struct fd_data *fd = arg;
|
|
|
|
g_topology_assert();
|
|
g_wither_geom(fd->fd_geom, ENXIO);
|
|
}
|
|
|
|
static int
|
|
fd_detach(device_t dev)
|
|
{
|
|
struct fd_data *fd;
|
|
|
|
fd = device_get_softc(dev);
|
|
|
|
g_waitfor_event(fd_detach_geom, fd, M_WAITOK, NULL);
|
|
while (!fd->gone) {
|
|
tsleep(fd, PZERO, "fdgone", hz/10);
|
|
}
|
|
|
|
/*
|
|
* There may be accesses to the floppy while we're waitng, so drain the
|
|
* motor callback here. fdc_detach turns off motor if it's still on when
|
|
* we get to this point.
|
|
*/
|
|
callout_drain(&fd->toffhandle);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t fd_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, fd_probe),
|
|
DEVMETHOD(device_attach, fd_attach),
|
|
DEVMETHOD(device_detach, fd_detach),
|
|
DEVMETHOD(device_shutdown, bus_generic_shutdown),
|
|
DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
|
|
DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t fd_driver = {
|
|
"fd",
|
|
fd_methods,
|
|
sizeof(struct fd_data)
|
|
};
|
|
|
|
static int
|
|
fdc_modevent(module_t mod, int type, void *data)
|
|
{
|
|
|
|
return (g_modevent(NULL, type, &g_fd_class));
|
|
}
|
|
|
|
DRIVER_MODULE(fd, fdc, fd_driver, fdc_modevent, 0);
|