1b67be7b75
Centralize the fdctl_wr() function by adding the offset in
the resource to the softc structure.
Bugfix: Read the drive-change signal from the correct place:
same place as the ctl register.
Remove the cdevsw{} related code and implement a GEOM class.
Ditch the state-engine and park a thread on each controller
to service the queue.
Make the interrupt FAST & MPSAFE since it is just a simple
wakeup(9) call.
Rely on a per controller mutex to protect the bioqueues.
Grab GEOMs topology lock when we have to and Giant when
ISADMA needs it. Since all access to the hardware is
isolated in the per controller thread, the rest of the
driver is lock & Giant free.
Create a per-drive queue where requests are parked while
the motor spins up. When the motor is running the requests
are purged to the per controller queue. This allows
requests to other drives to be serviced during spin-up.
Only setup the motor-off timeout when we finish the last
request on the queue and cancel it when a new request
arrives. This fixes the bug in the old code where the motor
turned off while we were still retrying a request.
Make the "drive-change" work reliably. Probe the drive on
first opens. Probe with a recal and a seek to cyl=1 to
reset the drive change line and check again to see if we
have a media.
When we see the media disappear we destroy the geom provider,
create a new one, and flag that autodetection should happen
next time we see a media (unless a specific format is configured).
Add sysctl tunables for a lot of drive related parameters.
If you spend a lot of time waiting for floppies you can
grab the i82078 pdf from Intels web-page and try tuning
these.
Add sysctl debug.fdc.debugflags which will enable various
kinds of debugging printfs.
Add central definitions of our well known floppy formats.
Simplify datastructures for autoselection of format and
call the code at the right times.
Bugfix: Remove at least one piece of code which would have
made 2.88M floppies not work.
Use implied seeks on enhanced controllers.
Use multisector transfers on all controllers. Increase
ISADMA bounce buffers accordingly.
Fall back to single sector when retrying. Reset retry count
on every successful transaction.
Sort functions in a more sensible order and generally tidy
up a fair bit here and there.
Assorted related fixes and adjustments in userland utilities.
WORKAROUNDS:
Do allow r/w opens of r/o media but refuse actual write
operations. This is necessary until the p4::phk_bufwork
branch gets integrated (This problem relates to remounting
not reopening devices, see sys/*/*/${fs}_vfsops.c for details).
Keep PC98's private copy of the old floppy driver compiling
and presumably working (see below).
TODO (planned)
Move probing of drives until after interrupts/timeouts work
(like for ATA/SCSI drives).
TODO (unplanned)
This driver should be made to work on PC98 as well.
Test on YE-DATA PCMCIA floppy drive.
Fix 2.88M media.
This is a MT5 candidate (depends on the bioq_takefirst() addition).
94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/*-
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* Copyright (c) 2004 M. Warner Losh.
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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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* without modification, immediately at the beginning of the file.
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* 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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* $FreeBSD$
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*/
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/* XXX should audit this file to see if additional copyrights needed */
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enum fdc_type {
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FDC_NE765, FDC_ENHANCED, FDC_UNKNOWN = -1
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};
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/*
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* Per controller structure (softc).
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*/
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struct fdc_data {
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int fdcu; /* our unit number */
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int dmacnt;
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int dmachan;
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int flags;
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#define FDC_HASDMA 0x01
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#define FDC_STAT_VALID 0x08
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#define FDC_HAS_FIFO 0x10
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#define FDC_NEEDS_RESET 0x20
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#define FDC_NODMA 0x40
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#define FDC_ISPNP 0x80
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#define FDC_ISPCMCIA 0x100
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struct fd_data *fd; /* The active drive */
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int retry;
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int fdout; /* mirror of the w/o digital output reg */
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u_int status[7]; /* copy of the registers */
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enum fdc_type fdct; /* chip version of FDC */
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int fdc_errs; /* number of logged errors */
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struct bio_queue_head head;
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struct bio *bp; /* active buffer */
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struct resource *res_ioport, *res_ctl, *res_irq, *res_drq;
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int rid_ioport, rid_ctl, rid_irq, rid_drq;
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int port_off;
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bus_space_tag_t portt;
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bus_space_handle_t porth;
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bus_space_tag_t ctlt;
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bus_space_handle_t ctlh;
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int ctl_off;
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void *fdc_intr;
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struct device *fdc_dev;
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struct mtx fdc_mtx;
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struct proc *fdc_thread;
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};
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extern devclass_t fdc_devclass;
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enum fdc_device_ivars {
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FDC_IVAR_FDUNIT,
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FDC_IVAR_FDTYPE,
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};
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__BUS_ACCESSOR(fdc, fdunit, FDC, FDUNIT, int);
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__BUS_ACCESSOR(fdc, fdtype, FDC, FDTYPE, int);
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void fdc_release_resources(struct fdc_data *);
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int fdc_attach(device_t);
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int fdc_hints_probe(device_t);
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int fdc_detach(device_t dev);
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device_t fdc_add_child(device_t, const char *, int);
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int fdc_initial_reset(device_t, struct fdc_data *);
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int fdc_print_child(device_t, device_t);
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int fdc_read_ivar(device_t, device_t, int, uintptr_t *);
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int fdc_write_ivar(device_t, device_t, int, uintptr_t);
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int fdc_isa_alloc_resources(device_t, struct fdc_data *);
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