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bfa10b8c98
Block layer now handles O_EXCL in a generic way for block devices.
The semantics is however different for floppy and all other block devices,
as floppy driver contains its own O_EXCL handling.
The semantics for all-but-floppy bdevs is "there can be at most one O_EXCL
open of this file", while for floppy bdev the semantics is "if someone has
the bdev open with O_EXCL, noone else can open it".
There is actual userspace-observable change in behavior because of this
since commit e525fd89d3 ("block: make blkdev_get/put() handle exclusive
access") -- on kernels containing this commit, mount of /dev/fd0 causes
the fd0 block device be claimed with _EXCL, preventing subsequent
open(/dev/fd0).
Bring things back into shape, i.e. make it possible, analogically to
other block devices, to mount the floppy and open() it afterwards --
remove the floppy-specific handling and let the generic bdev code O_EXCL
handling take over.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
4590 lines
116 KiB
C
4590 lines
116 KiB
C
/*
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* linux/drivers/block/floppy.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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* Copyright (C) 1993, 1994 Alain Knaff
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* Copyright (C) 1998 Alan Cox
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*/
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/*
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* 02.12.91 - Changed to static variables to indicate need for reset
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* and recalibrate. This makes some things easier (output_byte reset
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* checking etc), and means less interrupt jumping in case of errors,
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* so the code is hopefully easier to understand.
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*/
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/*
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* This file is certainly a mess. I've tried my best to get it working,
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* but I don't like programming floppies, and I have only one anyway.
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* Urgel. I should check for more errors, and do more graceful error
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* recovery. Seems there are problems with several drives. I've tried to
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* correct them. No promises.
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*/
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/*
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* As with hd.c, all routines within this file can (and will) be called
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* by interrupts, so extreme caution is needed. A hardware interrupt
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* handler may not sleep, or a kernel panic will happen. Thus I cannot
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* call "floppy-on" directly, but have to set a special timer interrupt
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* etc.
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*/
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/*
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* 28.02.92 - made track-buffering routines, based on the routines written
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* by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
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*/
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/*
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* Automatic floppy-detection and formatting written by Werner Almesberger
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* (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
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* the floppy-change signal detection.
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*/
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/*
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* 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
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* FDC data overrun bug, added some preliminary stuff for vertical
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* recording support.
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*
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* 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
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*
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* TODO: Errors are still not counted properly.
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*/
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/* 1992/9/20
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* Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
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* modeled after the freeware MS-DOS program fdformat/88 V1.8 by
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* Christoph H. Hochst\"atter.
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* I have fixed the shift values to the ones I always use. Maybe a new
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* ioctl() should be created to be able to modify them.
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* There is a bug in the driver that makes it impossible to format a
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* floppy as the first thing after bootup.
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*/
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/*
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* 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
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* this helped the floppy driver as well. Much cleaner, and still seems to
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* work.
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*/
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/* 1994/6/24 --bbroad-- added the floppy table entries and made
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* minor modifications to allow 2.88 floppies to be run.
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*/
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/* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
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* disk types.
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*/
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/*
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* 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
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* format bug fixes, but unfortunately some new bugs too...
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*/
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/* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
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* errors to allow safe writing by specialized programs.
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*/
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/* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
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* by defining bit 1 of the "stretch" parameter to mean put sectors on the
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* opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
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* drives are "upside-down").
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*/
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/*
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* 1995/8/26 -- Andreas Busse -- added Mips support.
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*/
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/*
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* 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
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* features to asm/floppy.h.
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*/
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/*
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* 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
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*/
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/*
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* 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
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* interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
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* use of '0' for NULL.
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*/
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/*
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* 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
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* failures.
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*/
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/*
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* 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
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*/
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/*
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* 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
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* days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
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* being used to store jiffies, which are unsigned longs).
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*/
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/*
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* 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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* - get rid of check_region
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* - s/suser/capable/
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*/
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/*
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* 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
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* floppy controller (lingering task on list after module is gone... boom.)
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*/
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/*
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* 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
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* (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
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* requires many non-obvious changes in arch dependent code.
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*/
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/* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>.
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* Better audit of register_blkdev.
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*/
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#undef FLOPPY_SILENT_DCL_CLEAR
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#define REALLY_SLOW_IO
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#define DEBUGT 2
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#define DPRINT(format, args...) \
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pr_info("floppy%d: " format, current_drive, ##args)
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#define DCL_DEBUG /* debug disk change line */
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#ifdef DCL_DEBUG
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#define debug_dcl(test, fmt, args...) \
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do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0)
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#else
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#define debug_dcl(test, fmt, args...) \
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do { if (0) DPRINT(fmt, ##args); } while (0)
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#endif
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/* do print messages for unexpected interrupts */
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static int print_unex = 1;
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#define FDPATCHES
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#include <linux/fdreg.h>
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#include <linux/fd.h>
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#include <linux/hdreg.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/bio.h>
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#include <linux/string.h>
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#include <linux/jiffies.h>
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#include <linux/fcntl.h>
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#include <linux/delay.h>
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#include <linux/mc146818rtc.h> /* CMOS defines */
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/mod_devicetable.h>
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#include <linux/mutex.h>
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#include <linux/io.h>
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#include <linux/uaccess.h>
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/*
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* PS/2 floppies have much slower step rates than regular floppies.
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* It's been recommended that take about 1/4 of the default speed
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* in some more extreme cases.
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*/
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static DEFINE_MUTEX(floppy_mutex);
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static int slow_floppy;
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#include <asm/dma.h>
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#include <asm/irq.h>
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static int FLOPPY_IRQ = 6;
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static int FLOPPY_DMA = 2;
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static int can_use_virtual_dma = 2;
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/* =======
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* can use virtual DMA:
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* 0 = use of virtual DMA disallowed by config
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* 1 = use of virtual DMA prescribed by config
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* 2 = no virtual DMA preference configured. By default try hard DMA,
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* but fall back on virtual DMA when not enough memory available
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*/
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static int use_virtual_dma;
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/* =======
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* use virtual DMA
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* 0 using hard DMA
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* 1 using virtual DMA
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* This variable is set to virtual when a DMA mem problem arises, and
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* reset back in floppy_grab_irq_and_dma.
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* It is not safe to reset it in other circumstances, because the floppy
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* driver may have several buffers in use at once, and we do currently not
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* record each buffers capabilities
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*/
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static DEFINE_SPINLOCK(floppy_lock);
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static unsigned short virtual_dma_port = 0x3f0;
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irqreturn_t floppy_interrupt(int irq, void *dev_id);
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static int set_dor(int fdc, char mask, char data);
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#define K_64 0x10000 /* 64KB */
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/* the following is the mask of allowed drives. By default units 2 and
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* 3 of both floppy controllers are disabled, because switching on the
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* motor of these drives causes system hangs on some PCI computers. drive
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* 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
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* a drive is allowed.
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*
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* NOTE: This must come before we include the arch floppy header because
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* some ports reference this variable from there. -DaveM
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*/
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static int allowed_drive_mask = 0x33;
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#include <asm/floppy.h>
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static int irqdma_allocated;
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#include <linux/blkdev.h>
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#include <linux/blkpg.h>
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#include <linux/cdrom.h> /* for the compatibility eject ioctl */
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#include <linux/completion.h>
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static struct request *current_req;
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static void do_fd_request(struct request_queue *q);
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static int set_next_request(void);
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#ifndef fd_get_dma_residue
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#define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
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#endif
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/* Dma Memory related stuff */
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#ifndef fd_dma_mem_free
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#define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
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#endif
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#ifndef fd_dma_mem_alloc
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#define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size))
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#endif
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static inline void fallback_on_nodma_alloc(char **addr, size_t l)
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{
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#ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
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if (*addr)
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return; /* we have the memory */
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if (can_use_virtual_dma != 2)
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return; /* no fallback allowed */
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pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n");
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*addr = (char *)nodma_mem_alloc(l);
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#else
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return;
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#endif
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}
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/* End dma memory related stuff */
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static unsigned long fake_change;
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static bool initialized;
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#define ITYPE(x) (((x) >> 2) & 0x1f)
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#define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
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#define UNIT(x) ((x) & 0x03) /* drive on fdc */
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#define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
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/* reverse mapping from unit and fdc to drive */
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#define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
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#define DP (&drive_params[current_drive])
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#define DRS (&drive_state[current_drive])
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#define DRWE (&write_errors[current_drive])
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#define FDCS (&fdc_state[fdc])
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#define UDP (&drive_params[drive])
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#define UDRS (&drive_state[drive])
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#define UDRWE (&write_errors[drive])
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#define UFDCS (&fdc_state[FDC(drive)])
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#define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2)
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#define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
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/* read/write */
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#define COMMAND (raw_cmd->cmd[0])
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#define DR_SELECT (raw_cmd->cmd[1])
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#define TRACK (raw_cmd->cmd[2])
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#define HEAD (raw_cmd->cmd[3])
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#define SECTOR (raw_cmd->cmd[4])
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#define SIZECODE (raw_cmd->cmd[5])
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#define SECT_PER_TRACK (raw_cmd->cmd[6])
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#define GAP (raw_cmd->cmd[7])
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#define SIZECODE2 (raw_cmd->cmd[8])
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#define NR_RW 9
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/* format */
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#define F_SIZECODE (raw_cmd->cmd[2])
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#define F_SECT_PER_TRACK (raw_cmd->cmd[3])
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#define F_GAP (raw_cmd->cmd[4])
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#define F_FILL (raw_cmd->cmd[5])
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#define NR_F 6
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/*
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* Maximum disk size (in kilobytes).
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* This default is used whenever the current disk size is unknown.
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* [Now it is rather a minimum]
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*/
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#define MAX_DISK_SIZE 4 /* 3984 */
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/*
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* globals used by 'result()'
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*/
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#define MAX_REPLIES 16
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static unsigned char reply_buffer[MAX_REPLIES];
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static int inr; /* size of reply buffer, when called from interrupt */
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#define ST0 (reply_buffer[0])
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#define ST1 (reply_buffer[1])
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#define ST2 (reply_buffer[2])
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#define ST3 (reply_buffer[0]) /* result of GETSTATUS */
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#define R_TRACK (reply_buffer[3])
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#define R_HEAD (reply_buffer[4])
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#define R_SECTOR (reply_buffer[5])
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#define R_SIZECODE (reply_buffer[6])
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#define SEL_DLY (2 * HZ / 100)
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/*
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* this struct defines the different floppy drive types.
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*/
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static struct {
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struct floppy_drive_params params;
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const char *name; /* name printed while booting */
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} default_drive_params[] = {
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/* NOTE: the time values in jiffies should be in msec!
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CMOS drive type
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| Maximum data rate supported by drive type
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| | Head load time, msec
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| | | Head unload time, msec (not used)
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| | | | Step rate interval, usec
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| | | | | Time needed for spinup time (jiffies)
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| | | | | | Timeout for spinning down (jiffies)
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| | | | | | | Spindown offset (where disk stops)
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| | | | | | | | Select delay
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| | | | | | | | | RPS
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| | | | | | | | | | Max number of tracks
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| | | | | | | | | | | Interrupt timeout
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| | | | | | | | | | | | Max nonintlv. sectors
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| | | | | | | | | | | | | -Max Errors- flags */
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{{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
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0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
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{{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
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0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
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{{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
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0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
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{{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
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0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
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{{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
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0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
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{{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
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0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
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{{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
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0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
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/* | --autodetected formats--- | | |
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* read_track | | Name printed when booting
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* | Native format
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* Frequency of disk change checks */
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};
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static struct floppy_drive_params drive_params[N_DRIVE];
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static struct floppy_drive_struct drive_state[N_DRIVE];
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static struct floppy_write_errors write_errors[N_DRIVE];
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static struct timer_list motor_off_timer[N_DRIVE];
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static struct gendisk *disks[N_DRIVE];
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static struct block_device *opened_bdev[N_DRIVE];
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static DEFINE_MUTEX(open_lock);
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static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
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static int fdc_queue;
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/*
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* This struct defines the different floppy types.
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*
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* Bit 0 of 'stretch' tells if the tracks need to be doubled for some
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* types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
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* tells if the disk is in Commodore 1581 format, which means side 0 sectors
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* are located on side 1 of the disk but with a side 0 ID, and vice-versa.
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* This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
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* 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
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* side 0 is on physical side 0 (but with the misnamed sector IDs).
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* 'stretch' should probably be renamed to something more general, like
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* 'options'.
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*
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* Bits 2 through 9 of 'stretch' tell the number of the first sector.
|
|
* The LSB (bit 2) is flipped. For most disks, the first sector
|
|
* is 1 (represented by 0x00<<2). For some CP/M and music sampler
|
|
* disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2).
|
|
* For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2).
|
|
*
|
|
* Other parameters should be self-explanatory (see also setfdprm(8)).
|
|
*/
|
|
/*
|
|
Size
|
|
| Sectors per track
|
|
| | Head
|
|
| | | Tracks
|
|
| | | | Stretch
|
|
| | | | | Gap 1 size
|
|
| | | | | | Data rate, | 0x40 for perp
|
|
| | | | | | | Spec1 (stepping rate, head unload
|
|
| | | | | | | | /fmt gap (gap2) */
|
|
static struct floppy_struct floppy_type[32] = {
|
|
{ 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
|
|
{ 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
|
|
{ 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
|
|
{ 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
|
|
{ 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
|
|
{ 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
|
|
{ 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
|
|
{ 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
|
|
{ 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
|
|
{ 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
|
|
|
|
{ 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
|
|
{ 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
|
|
{ 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
|
|
{ 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
|
|
{ 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
|
|
{ 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
|
|
{ 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
|
|
{ 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
|
|
{ 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
|
|
{ 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
|
|
|
|
{ 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
|
|
{ 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
|
|
{ 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
|
|
{ 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
|
|
{ 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
|
|
{ 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
|
|
{ 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
|
|
{ 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
|
|
{ 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
|
|
{ 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
|
|
|
|
{ 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
|
|
{ 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
|
|
};
|
|
|
|
#define SECTSIZE (_FD_SECTSIZE(*floppy))
|
|
|
|
/* Auto-detection: Disk type used until the next media change occurs. */
|
|
static struct floppy_struct *current_type[N_DRIVE];
|
|
|
|
/*
|
|
* User-provided type information. current_type points to
|
|
* the respective entry of this array.
|
|
*/
|
|
static struct floppy_struct user_params[N_DRIVE];
|
|
|
|
static sector_t floppy_sizes[256];
|
|
|
|
static char floppy_device_name[] = "floppy";
|
|
|
|
/*
|
|
* The driver is trying to determine the correct media format
|
|
* while probing is set. rw_interrupt() clears it after a
|
|
* successful access.
|
|
*/
|
|
static int probing;
|
|
|
|
/* Synchronization of FDC access. */
|
|
#define FD_COMMAND_NONE -1
|
|
#define FD_COMMAND_ERROR 2
|
|
#define FD_COMMAND_OKAY 3
|
|
|
|
static volatile int command_status = FD_COMMAND_NONE;
|
|
static unsigned long fdc_busy;
|
|
static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
|
|
static DECLARE_WAIT_QUEUE_HEAD(command_done);
|
|
|
|
/* Errors during formatting are counted here. */
|
|
static int format_errors;
|
|
|
|
/* Format request descriptor. */
|
|
static struct format_descr format_req;
|
|
|
|
/*
|
|
* Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
|
|
* Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
|
|
* H is head unload time (1=16ms, 2=32ms, etc)
|
|
*/
|
|
|
|
/*
|
|
* Track buffer
|
|
* Because these are written to by the DMA controller, they must
|
|
* not contain a 64k byte boundary crossing, or data will be
|
|
* corrupted/lost.
|
|
*/
|
|
static char *floppy_track_buffer;
|
|
static int max_buffer_sectors;
|
|
|
|
static int *errors;
|
|
typedef void (*done_f)(int);
|
|
static const struct cont_t {
|
|
void (*interrupt)(void);
|
|
/* this is called after the interrupt of the
|
|
* main command */
|
|
void (*redo)(void); /* this is called to retry the operation */
|
|
void (*error)(void); /* this is called to tally an error */
|
|
done_f done; /* this is called to say if the operation has
|
|
* succeeded/failed */
|
|
} *cont;
|
|
|
|
static void floppy_ready(void);
|
|
static void floppy_start(void);
|
|
static void process_fd_request(void);
|
|
static void recalibrate_floppy(void);
|
|
static void floppy_shutdown(struct work_struct *);
|
|
|
|
static int floppy_request_regions(int);
|
|
static void floppy_release_regions(int);
|
|
static int floppy_grab_irq_and_dma(void);
|
|
static void floppy_release_irq_and_dma(void);
|
|
|
|
/*
|
|
* The "reset" variable should be tested whenever an interrupt is scheduled,
|
|
* after the commands have been sent. This is to ensure that the driver doesn't
|
|
* get wedged when the interrupt doesn't come because of a failed command.
|
|
* reset doesn't need to be tested before sending commands, because
|
|
* output_byte is automatically disabled when reset is set.
|
|
*/
|
|
static void reset_fdc(void);
|
|
|
|
/*
|
|
* These are global variables, as that's the easiest way to give
|
|
* information to interrupts. They are the data used for the current
|
|
* request.
|
|
*/
|
|
#define NO_TRACK -1
|
|
#define NEED_1_RECAL -2
|
|
#define NEED_2_RECAL -3
|
|
|
|
static atomic_t usage_count = ATOMIC_INIT(0);
|
|
|
|
/* buffer related variables */
|
|
static int buffer_track = -1;
|
|
static int buffer_drive = -1;
|
|
static int buffer_min = -1;
|
|
static int buffer_max = -1;
|
|
|
|
/* fdc related variables, should end up in a struct */
|
|
static struct floppy_fdc_state fdc_state[N_FDC];
|
|
static int fdc; /* current fdc */
|
|
|
|
static struct workqueue_struct *floppy_wq;
|
|
|
|
static struct floppy_struct *_floppy = floppy_type;
|
|
static unsigned char current_drive;
|
|
static long current_count_sectors;
|
|
static unsigned char fsector_t; /* sector in track */
|
|
static unsigned char in_sector_offset; /* offset within physical sector,
|
|
* expressed in units of 512 bytes */
|
|
|
|
static inline bool drive_no_geom(int drive)
|
|
{
|
|
return !current_type[drive] && !ITYPE(UDRS->fd_device);
|
|
}
|
|
|
|
#ifndef fd_eject
|
|
static inline int fd_eject(int drive)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Debugging
|
|
* =========
|
|
*/
|
|
#ifdef DEBUGT
|
|
static long unsigned debugtimer;
|
|
|
|
static inline void set_debugt(void)
|
|
{
|
|
debugtimer = jiffies;
|
|
}
|
|
|
|
static inline void debugt(const char *func, const char *msg)
|
|
{
|
|
if (DP->flags & DEBUGT)
|
|
pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer);
|
|
}
|
|
#else
|
|
static inline void set_debugt(void) { }
|
|
static inline void debugt(const char *func, const char *msg) { }
|
|
#endif /* DEBUGT */
|
|
|
|
|
|
static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown);
|
|
static const char *timeout_message;
|
|
|
|
static void is_alive(const char *func, const char *message)
|
|
{
|
|
/* this routine checks whether the floppy driver is "alive" */
|
|
if (test_bit(0, &fdc_busy) && command_status < 2 &&
|
|
!delayed_work_pending(&fd_timeout)) {
|
|
DPRINT("%s: timeout handler died. %s\n", func, message);
|
|
}
|
|
}
|
|
|
|
static void (*do_floppy)(void) = NULL;
|
|
|
|
#define OLOGSIZE 20
|
|
|
|
static void (*lasthandler)(void);
|
|
static unsigned long interruptjiffies;
|
|
static unsigned long resultjiffies;
|
|
static int resultsize;
|
|
static unsigned long lastredo;
|
|
|
|
static struct output_log {
|
|
unsigned char data;
|
|
unsigned char status;
|
|
unsigned long jiffies;
|
|
} output_log[OLOGSIZE];
|
|
|
|
static int output_log_pos;
|
|
|
|
#define current_reqD -1
|
|
#define MAXTIMEOUT -2
|
|
|
|
static void __reschedule_timeout(int drive, const char *message)
|
|
{
|
|
unsigned long delay;
|
|
|
|
if (drive == current_reqD)
|
|
drive = current_drive;
|
|
|
|
if (drive < 0 || drive >= N_DRIVE) {
|
|
delay = 20UL * HZ;
|
|
drive = 0;
|
|
} else
|
|
delay = UDP->timeout;
|
|
|
|
queue_delayed_work(floppy_wq, &fd_timeout, delay);
|
|
if (UDP->flags & FD_DEBUG)
|
|
DPRINT("reschedule timeout %s\n", message);
|
|
timeout_message = message;
|
|
}
|
|
|
|
static void reschedule_timeout(int drive, const char *message)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&floppy_lock, flags);
|
|
__reschedule_timeout(drive, message);
|
|
spin_unlock_irqrestore(&floppy_lock, flags);
|
|
}
|
|
|
|
#define INFBOUND(a, b) (a) = max_t(int, a, b)
|
|
#define SUPBOUND(a, b) (a) = min_t(int, a, b)
|
|
|
|
/*
|
|
* Bottom half floppy driver.
|
|
* ==========================
|
|
*
|
|
* This part of the file contains the code talking directly to the hardware,
|
|
* and also the main service loop (seek-configure-spinup-command)
|
|
*/
|
|
|
|
/*
|
|
* disk change.
|
|
* This routine is responsible for maintaining the FD_DISK_CHANGE flag,
|
|
* and the last_checked date.
|
|
*
|
|
* last_checked is the date of the last check which showed 'no disk change'
|
|
* FD_DISK_CHANGE is set under two conditions:
|
|
* 1. The floppy has been changed after some i/o to that floppy already
|
|
* took place.
|
|
* 2. No floppy disk is in the drive. This is done in order to ensure that
|
|
* requests are quickly flushed in case there is no disk in the drive. It
|
|
* follows that FD_DISK_CHANGE can only be cleared if there is a disk in
|
|
* the drive.
|
|
*
|
|
* For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
|
|
* For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
|
|
* each seek. If a disk is present, the disk change line should also be
|
|
* cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
|
|
* change line is set, this means either that no disk is in the drive, or
|
|
* that it has been removed since the last seek.
|
|
*
|
|
* This means that we really have a third possibility too:
|
|
* The floppy has been changed after the last seek.
|
|
*/
|
|
|
|
static int disk_change(int drive)
|
|
{
|
|
int fdc = FDC(drive);
|
|
|
|
if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
|
|
DPRINT("WARNING disk change called early\n");
|
|
if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
|
|
(FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
|
|
DPRINT("probing disk change on unselected drive\n");
|
|
DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
|
|
(unsigned int)FDCS->dor);
|
|
}
|
|
|
|
debug_dcl(UDP->flags,
|
|
"checking disk change line for drive %d\n", drive);
|
|
debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies);
|
|
debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80);
|
|
debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags);
|
|
|
|
if (UDP->flags & FD_BROKEN_DCL)
|
|
return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
|
|
if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) {
|
|
set_bit(FD_VERIFY_BIT, &UDRS->flags);
|
|
/* verify write protection */
|
|
|
|
if (UDRS->maxblock) /* mark it changed */
|
|
set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
|
|
|
|
/* invalidate its geometry */
|
|
if (UDRS->keep_data >= 0) {
|
|
if ((UDP->flags & FTD_MSG) &&
|
|
current_type[drive] != NULL)
|
|
DPRINT("Disk type is undefined after disk change\n");
|
|
current_type[drive] = NULL;
|
|
floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1;
|
|
}
|
|
|
|
return 1;
|
|
} else {
|
|
UDRS->last_checked = jiffies;
|
|
clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int is_selected(int dor, int unit)
|
|
{
|
|
return ((dor & (0x10 << unit)) && (dor & 3) == unit);
|
|
}
|
|
|
|
static bool is_ready_state(int status)
|
|
{
|
|
int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA);
|
|
return state == STATUS_READY;
|
|
}
|
|
|
|
static int set_dor(int fdc, char mask, char data)
|
|
{
|
|
unsigned char unit;
|
|
unsigned char drive;
|
|
unsigned char newdor;
|
|
unsigned char olddor;
|
|
|
|
if (FDCS->address == -1)
|
|
return -1;
|
|
|
|
olddor = FDCS->dor;
|
|
newdor = (olddor & mask) | data;
|
|
if (newdor != olddor) {
|
|
unit = olddor & 0x3;
|
|
if (is_selected(olddor, unit) && !is_selected(newdor, unit)) {
|
|
drive = REVDRIVE(fdc, unit);
|
|
debug_dcl(UDP->flags,
|
|
"calling disk change from set_dor\n");
|
|
disk_change(drive);
|
|
}
|
|
FDCS->dor = newdor;
|
|
fd_outb(newdor, FD_DOR);
|
|
|
|
unit = newdor & 0x3;
|
|
if (!is_selected(olddor, unit) && is_selected(newdor, unit)) {
|
|
drive = REVDRIVE(fdc, unit);
|
|
UDRS->select_date = jiffies;
|
|
}
|
|
}
|
|
return olddor;
|
|
}
|
|
|
|
static void twaddle(void)
|
|
{
|
|
if (DP->select_delay)
|
|
return;
|
|
fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
|
|
fd_outb(FDCS->dor, FD_DOR);
|
|
DRS->select_date = jiffies;
|
|
}
|
|
|
|
/*
|
|
* Reset all driver information about the current fdc.
|
|
* This is needed after a reset, and after a raw command.
|
|
*/
|
|
static void reset_fdc_info(int mode)
|
|
{
|
|
int drive;
|
|
|
|
FDCS->spec1 = FDCS->spec2 = -1;
|
|
FDCS->need_configure = 1;
|
|
FDCS->perp_mode = 1;
|
|
FDCS->rawcmd = 0;
|
|
for (drive = 0; drive < N_DRIVE; drive++)
|
|
if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
|
|
UDRS->track = NEED_2_RECAL;
|
|
}
|
|
|
|
/* selects the fdc and drive, and enables the fdc's input/dma. */
|
|
static void set_fdc(int drive)
|
|
{
|
|
if (drive >= 0 && drive < N_DRIVE) {
|
|
fdc = FDC(drive);
|
|
current_drive = drive;
|
|
}
|
|
if (fdc != 1 && fdc != 0) {
|
|
pr_info("bad fdc value\n");
|
|
return;
|
|
}
|
|
set_dor(fdc, ~0, 8);
|
|
#if N_FDC > 1
|
|
set_dor(1 - fdc, ~8, 0);
|
|
#endif
|
|
if (FDCS->rawcmd == 2)
|
|
reset_fdc_info(1);
|
|
if (fd_inb(FD_STATUS) != STATUS_READY)
|
|
FDCS->reset = 1;
|
|
}
|
|
|
|
/* locks the driver */
|
|
static int lock_fdc(int drive, bool interruptible)
|
|
{
|
|
if (WARN(atomic_read(&usage_count) == 0,
|
|
"Trying to lock fdc while usage count=0\n"))
|
|
return -1;
|
|
|
|
if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy)))
|
|
return -EINTR;
|
|
|
|
command_status = FD_COMMAND_NONE;
|
|
|
|
reschedule_timeout(drive, "lock fdc");
|
|
set_fdc(drive);
|
|
return 0;
|
|
}
|
|
|
|
/* unlocks the driver */
|
|
static void unlock_fdc(void)
|
|
{
|
|
if (!test_bit(0, &fdc_busy))
|
|
DPRINT("FDC access conflict!\n");
|
|
|
|
raw_cmd = NULL;
|
|
command_status = FD_COMMAND_NONE;
|
|
__cancel_delayed_work(&fd_timeout);
|
|
do_floppy = NULL;
|
|
cont = NULL;
|
|
clear_bit(0, &fdc_busy);
|
|
wake_up(&fdc_wait);
|
|
}
|
|
|
|
/* switches the motor off after a given timeout */
|
|
static void motor_off_callback(unsigned long nr)
|
|
{
|
|
unsigned char mask = ~(0x10 << UNIT(nr));
|
|
|
|
set_dor(FDC(nr), mask, 0);
|
|
}
|
|
|
|
/* schedules motor off */
|
|
static void floppy_off(unsigned int drive)
|
|
{
|
|
unsigned long volatile delta;
|
|
int fdc = FDC(drive);
|
|
|
|
if (!(FDCS->dor & (0x10 << UNIT(drive))))
|
|
return;
|
|
|
|
del_timer(motor_off_timer + drive);
|
|
|
|
/* make spindle stop in a position which minimizes spinup time
|
|
* next time */
|
|
if (UDP->rps) {
|
|
delta = jiffies - UDRS->first_read_date + HZ -
|
|
UDP->spindown_offset;
|
|
delta = ((delta * UDP->rps) % HZ) / UDP->rps;
|
|
motor_off_timer[drive].expires =
|
|
jiffies + UDP->spindown - delta;
|
|
}
|
|
add_timer(motor_off_timer + drive);
|
|
}
|
|
|
|
/*
|
|
* cycle through all N_DRIVE floppy drives, for disk change testing.
|
|
* stopping at current drive. This is done before any long operation, to
|
|
* be sure to have up to date disk change information.
|
|
*/
|
|
static void scandrives(void)
|
|
{
|
|
int i;
|
|
int drive;
|
|
int saved_drive;
|
|
|
|
if (DP->select_delay)
|
|
return;
|
|
|
|
saved_drive = current_drive;
|
|
for (i = 0; i < N_DRIVE; i++) {
|
|
drive = (saved_drive + i + 1) % N_DRIVE;
|
|
if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
|
|
continue; /* skip closed drives */
|
|
set_fdc(drive);
|
|
if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
|
|
(0x10 << UNIT(drive))))
|
|
/* switch the motor off again, if it was off to
|
|
* begin with */
|
|
set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
|
|
}
|
|
set_fdc(saved_drive);
|
|
}
|
|
|
|
static void empty(void)
|
|
{
|
|
}
|
|
|
|
static DECLARE_WORK(floppy_work, NULL);
|
|
|
|
static void schedule_bh(void (*handler)(void))
|
|
{
|
|
WARN_ON(work_pending(&floppy_work));
|
|
|
|
PREPARE_WORK(&floppy_work, (work_func_t)handler);
|
|
queue_work(floppy_wq, &floppy_work);
|
|
}
|
|
|
|
static DECLARE_DELAYED_WORK(fd_timer, NULL);
|
|
|
|
static void cancel_activity(void)
|
|
{
|
|
do_floppy = NULL;
|
|
cancel_delayed_work_sync(&fd_timer);
|
|
cancel_work_sync(&floppy_work);
|
|
}
|
|
|
|
/* this function makes sure that the disk stays in the drive during the
|
|
* transfer */
|
|
static void fd_watchdog(struct work_struct *arg)
|
|
{
|
|
debug_dcl(DP->flags, "calling disk change from watchdog\n");
|
|
|
|
if (disk_change(current_drive)) {
|
|
DPRINT("disk removed during i/o\n");
|
|
cancel_activity();
|
|
cont->done(0);
|
|
reset_fdc();
|
|
} else {
|
|
cancel_delayed_work(&fd_timer);
|
|
PREPARE_DELAYED_WORK(&fd_timer, fd_watchdog);
|
|
queue_delayed_work(floppy_wq, &fd_timer, HZ / 10);
|
|
}
|
|
}
|
|
|
|
static void main_command_interrupt(void)
|
|
{
|
|
cancel_delayed_work(&fd_timer);
|
|
cont->interrupt();
|
|
}
|
|
|
|
/* waits for a delay (spinup or select) to pass */
|
|
static int fd_wait_for_completion(unsigned long expires, work_func_t function)
|
|
{
|
|
if (FDCS->reset) {
|
|
reset_fdc(); /* do the reset during sleep to win time
|
|
* if we don't need to sleep, it's a good
|
|
* occasion anyways */
|
|
return 1;
|
|
}
|
|
|
|
if (time_before(jiffies, expires)) {
|
|
cancel_delayed_work(&fd_timer);
|
|
PREPARE_DELAYED_WORK(&fd_timer, function);
|
|
queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void setup_DMA(void)
|
|
{
|
|
unsigned long f;
|
|
|
|
if (raw_cmd->length == 0) {
|
|
int i;
|
|
|
|
pr_info("zero dma transfer size:");
|
|
for (i = 0; i < raw_cmd->cmd_count; i++)
|
|
pr_cont("%x,", raw_cmd->cmd[i]);
|
|
pr_cont("\n");
|
|
cont->done(0);
|
|
FDCS->reset = 1;
|
|
return;
|
|
}
|
|
if (((unsigned long)raw_cmd->kernel_data) % 512) {
|
|
pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
|
|
cont->done(0);
|
|
FDCS->reset = 1;
|
|
return;
|
|
}
|
|
f = claim_dma_lock();
|
|
fd_disable_dma();
|
|
#ifdef fd_dma_setup
|
|
if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
|
|
(raw_cmd->flags & FD_RAW_READ) ?
|
|
DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
|
|
release_dma_lock(f);
|
|
cont->done(0);
|
|
FDCS->reset = 1;
|
|
return;
|
|
}
|
|
release_dma_lock(f);
|
|
#else
|
|
fd_clear_dma_ff();
|
|
fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
|
|
fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ?
|
|
DMA_MODE_READ : DMA_MODE_WRITE);
|
|
fd_set_dma_addr(raw_cmd->kernel_data);
|
|
fd_set_dma_count(raw_cmd->length);
|
|
virtual_dma_port = FDCS->address;
|
|
fd_enable_dma();
|
|
release_dma_lock(f);
|
|
#endif
|
|
}
|
|
|
|
static void show_floppy(void);
|
|
|
|
/* waits until the fdc becomes ready */
|
|
static int wait_til_ready(void)
|
|
{
|
|
int status;
|
|
int counter;
|
|
|
|
if (FDCS->reset)
|
|
return -1;
|
|
for (counter = 0; counter < 10000; counter++) {
|
|
status = fd_inb(FD_STATUS);
|
|
if (status & STATUS_READY)
|
|
return status;
|
|
}
|
|
if (initialized) {
|
|
DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
|
|
show_floppy();
|
|
}
|
|
FDCS->reset = 1;
|
|
return -1;
|
|
}
|
|
|
|
/* sends a command byte to the fdc */
|
|
static int output_byte(char byte)
|
|
{
|
|
int status = wait_til_ready();
|
|
|
|
if (status < 0)
|
|
return -1;
|
|
|
|
if (is_ready_state(status)) {
|
|
fd_outb(byte, FD_DATA);
|
|
output_log[output_log_pos].data = byte;
|
|
output_log[output_log_pos].status = status;
|
|
output_log[output_log_pos].jiffies = jiffies;
|
|
output_log_pos = (output_log_pos + 1) % OLOGSIZE;
|
|
return 0;
|
|
}
|
|
FDCS->reset = 1;
|
|
if (initialized) {
|
|
DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
|
|
byte, fdc, status);
|
|
show_floppy();
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* gets the response from the fdc */
|
|
static int result(void)
|
|
{
|
|
int i;
|
|
int status = 0;
|
|
|
|
for (i = 0; i < MAX_REPLIES; i++) {
|
|
status = wait_til_ready();
|
|
if (status < 0)
|
|
break;
|
|
status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA;
|
|
if ((status & ~STATUS_BUSY) == STATUS_READY) {
|
|
resultjiffies = jiffies;
|
|
resultsize = i;
|
|
return i;
|
|
}
|
|
if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY))
|
|
reply_buffer[i] = fd_inb(FD_DATA);
|
|
else
|
|
break;
|
|
}
|
|
if (initialized) {
|
|
DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
|
|
fdc, status, i);
|
|
show_floppy();
|
|
}
|
|
FDCS->reset = 1;
|
|
return -1;
|
|
}
|
|
|
|
#define MORE_OUTPUT -2
|
|
/* does the fdc need more output? */
|
|
static int need_more_output(void)
|
|
{
|
|
int status = wait_til_ready();
|
|
|
|
if (status < 0)
|
|
return -1;
|
|
|
|
if (is_ready_state(status))
|
|
return MORE_OUTPUT;
|
|
|
|
return result();
|
|
}
|
|
|
|
/* Set perpendicular mode as required, based on data rate, if supported.
|
|
* 82077 Now tested. 1Mbps data rate only possible with 82077-1.
|
|
*/
|
|
static void perpendicular_mode(void)
|
|
{
|
|
unsigned char perp_mode;
|
|
|
|
if (raw_cmd->rate & 0x40) {
|
|
switch (raw_cmd->rate & 3) {
|
|
case 0:
|
|
perp_mode = 2;
|
|
break;
|
|
case 3:
|
|
perp_mode = 3;
|
|
break;
|
|
default:
|
|
DPRINT("Invalid data rate for perpendicular mode!\n");
|
|
cont->done(0);
|
|
FDCS->reset = 1;
|
|
/*
|
|
* convenient way to return to
|
|
* redo without too much hassle
|
|
* (deep stack et al.)
|
|
*/
|
|
return;
|
|
}
|
|
} else
|
|
perp_mode = 0;
|
|
|
|
if (FDCS->perp_mode == perp_mode)
|
|
return;
|
|
if (FDCS->version >= FDC_82077_ORIG) {
|
|
output_byte(FD_PERPENDICULAR);
|
|
output_byte(perp_mode);
|
|
FDCS->perp_mode = perp_mode;
|
|
} else if (perp_mode) {
|
|
DPRINT("perpendicular mode not supported by this FDC.\n");
|
|
}
|
|
} /* perpendicular_mode */
|
|
|
|
static int fifo_depth = 0xa;
|
|
static int no_fifo;
|
|
|
|
static int fdc_configure(void)
|
|
{
|
|
/* Turn on FIFO */
|
|
output_byte(FD_CONFIGURE);
|
|
if (need_more_output() != MORE_OUTPUT)
|
|
return 0;
|
|
output_byte(0);
|
|
output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
|
|
output_byte(0); /* pre-compensation from track
|
|
0 upwards */
|
|
return 1;
|
|
}
|
|
|
|
#define NOMINAL_DTR 500
|
|
|
|
/* Issue a "SPECIFY" command to set the step rate time, head unload time,
|
|
* head load time, and DMA disable flag to values needed by floppy.
|
|
*
|
|
* The value "dtr" is the data transfer rate in Kbps. It is needed
|
|
* to account for the data rate-based scaling done by the 82072 and 82077
|
|
* FDC types. This parameter is ignored for other types of FDCs (i.e.
|
|
* 8272a).
|
|
*
|
|
* Note that changing the data transfer rate has a (probably deleterious)
|
|
* effect on the parameters subject to scaling for 82072/82077 FDCs, so
|
|
* fdc_specify is called again after each data transfer rate
|
|
* change.
|
|
*
|
|
* srt: 1000 to 16000 in microseconds
|
|
* hut: 16 to 240 milliseconds
|
|
* hlt: 2 to 254 milliseconds
|
|
*
|
|
* These values are rounded up to the next highest available delay time.
|
|
*/
|
|
static void fdc_specify(void)
|
|
{
|
|
unsigned char spec1;
|
|
unsigned char spec2;
|
|
unsigned long srt;
|
|
unsigned long hlt;
|
|
unsigned long hut;
|
|
unsigned long dtr = NOMINAL_DTR;
|
|
unsigned long scale_dtr = NOMINAL_DTR;
|
|
int hlt_max_code = 0x7f;
|
|
int hut_max_code = 0xf;
|
|
|
|
if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
|
|
fdc_configure();
|
|
FDCS->need_configure = 0;
|
|
}
|
|
|
|
switch (raw_cmd->rate & 0x03) {
|
|
case 3:
|
|
dtr = 1000;
|
|
break;
|
|
case 1:
|
|
dtr = 300;
|
|
if (FDCS->version >= FDC_82078) {
|
|
/* chose the default rate table, not the one
|
|
* where 1 = 2 Mbps */
|
|
output_byte(FD_DRIVESPEC);
|
|
if (need_more_output() == MORE_OUTPUT) {
|
|
output_byte(UNIT(current_drive));
|
|
output_byte(0xc0);
|
|
}
|
|
}
|
|
break;
|
|
case 2:
|
|
dtr = 250;
|
|
break;
|
|
}
|
|
|
|
if (FDCS->version >= FDC_82072) {
|
|
scale_dtr = dtr;
|
|
hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
|
|
hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
|
|
}
|
|
|
|
/* Convert step rate from microseconds to milliseconds and 4 bits */
|
|
srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
|
|
if (slow_floppy)
|
|
srt = srt / 4;
|
|
|
|
SUPBOUND(srt, 0xf);
|
|
INFBOUND(srt, 0);
|
|
|
|
hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
|
|
if (hlt < 0x01)
|
|
hlt = 0x01;
|
|
else if (hlt > 0x7f)
|
|
hlt = hlt_max_code;
|
|
|
|
hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
|
|
if (hut < 0x1)
|
|
hut = 0x1;
|
|
else if (hut > 0xf)
|
|
hut = hut_max_code;
|
|
|
|
spec1 = (srt << 4) | hut;
|
|
spec2 = (hlt << 1) | (use_virtual_dma & 1);
|
|
|
|
/* If these parameters did not change, just return with success */
|
|
if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
|
|
/* Go ahead and set spec1 and spec2 */
|
|
output_byte(FD_SPECIFY);
|
|
output_byte(FDCS->spec1 = spec1);
|
|
output_byte(FDCS->spec2 = spec2);
|
|
}
|
|
} /* fdc_specify */
|
|
|
|
/* Set the FDC's data transfer rate on behalf of the specified drive.
|
|
* NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
|
|
* of the specify command (i.e. using the fdc_specify function).
|
|
*/
|
|
static int fdc_dtr(void)
|
|
{
|
|
/* If data rate not already set to desired value, set it. */
|
|
if ((raw_cmd->rate & 3) == FDCS->dtr)
|
|
return 0;
|
|
|
|
/* Set dtr */
|
|
fd_outb(raw_cmd->rate & 3, FD_DCR);
|
|
|
|
/* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
|
|
* need a stabilization period of several milliseconds to be
|
|
* enforced after data rate changes before R/W operations.
|
|
* Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
|
|
*/
|
|
FDCS->dtr = raw_cmd->rate & 3;
|
|
return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
|
|
(work_func_t)floppy_ready);
|
|
} /* fdc_dtr */
|
|
|
|
static void tell_sector(void)
|
|
{
|
|
pr_cont(": track %d, head %d, sector %d, size %d",
|
|
R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
|
|
} /* tell_sector */
|
|
|
|
static void print_errors(void)
|
|
{
|
|
DPRINT("");
|
|
if (ST0 & ST0_ECE) {
|
|
pr_cont("Recalibrate failed!");
|
|
} else if (ST2 & ST2_CRC) {
|
|
pr_cont("data CRC error");
|
|
tell_sector();
|
|
} else if (ST1 & ST1_CRC) {
|
|
pr_cont("CRC error");
|
|
tell_sector();
|
|
} else if ((ST1 & (ST1_MAM | ST1_ND)) ||
|
|
(ST2 & ST2_MAM)) {
|
|
if (!probing) {
|
|
pr_cont("sector not found");
|
|
tell_sector();
|
|
} else
|
|
pr_cont("probe failed...");
|
|
} else if (ST2 & ST2_WC) { /* seek error */
|
|
pr_cont("wrong cylinder");
|
|
} else if (ST2 & ST2_BC) { /* cylinder marked as bad */
|
|
pr_cont("bad cylinder");
|
|
} else {
|
|
pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x",
|
|
ST0, ST1, ST2);
|
|
tell_sector();
|
|
}
|
|
pr_cont("\n");
|
|
}
|
|
|
|
/*
|
|
* OK, this error interpreting routine is called after a
|
|
* DMA read/write has succeeded
|
|
* or failed, so we check the results, and copy any buffers.
|
|
* hhb: Added better error reporting.
|
|
* ak: Made this into a separate routine.
|
|
*/
|
|
static int interpret_errors(void)
|
|
{
|
|
char bad;
|
|
|
|
if (inr != 7) {
|
|
DPRINT("-- FDC reply error\n");
|
|
FDCS->reset = 1;
|
|
return 1;
|
|
}
|
|
|
|
/* check IC to find cause of interrupt */
|
|
switch (ST0 & ST0_INTR) {
|
|
case 0x40: /* error occurred during command execution */
|
|
if (ST1 & ST1_EOC)
|
|
return 0; /* occurs with pseudo-DMA */
|
|
bad = 1;
|
|
if (ST1 & ST1_WP) {
|
|
DPRINT("Drive is write protected\n");
|
|
clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
|
|
cont->done(0);
|
|
bad = 2;
|
|
} else if (ST1 & ST1_ND) {
|
|
set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
|
|
} else if (ST1 & ST1_OR) {
|
|
if (DP->flags & FTD_MSG)
|
|
DPRINT("Over/Underrun - retrying\n");
|
|
bad = 0;
|
|
} else if (*errors >= DP->max_errors.reporting) {
|
|
print_errors();
|
|
}
|
|
if (ST2 & ST2_WC || ST2 & ST2_BC)
|
|
/* wrong cylinder => recal */
|
|
DRS->track = NEED_2_RECAL;
|
|
return bad;
|
|
case 0x80: /* invalid command given */
|
|
DPRINT("Invalid FDC command given!\n");
|
|
cont->done(0);
|
|
return 2;
|
|
case 0xc0:
|
|
DPRINT("Abnormal termination caused by polling\n");
|
|
cont->error();
|
|
return 2;
|
|
default: /* (0) Normal command termination */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This routine is called when everything should be correctly set up
|
|
* for the transfer (i.e. floppy motor is on, the correct floppy is
|
|
* selected, and the head is sitting on the right track).
|
|
*/
|
|
static void setup_rw_floppy(void)
|
|
{
|
|
int i;
|
|
int r;
|
|
int flags;
|
|
int dflags;
|
|
unsigned long ready_date;
|
|
work_func_t function;
|
|
|
|
flags = raw_cmd->flags;
|
|
if (flags & (FD_RAW_READ | FD_RAW_WRITE))
|
|
flags |= FD_RAW_INTR;
|
|
|
|
if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
|
|
ready_date = DRS->spinup_date + DP->spinup;
|
|
/* If spinup will take a long time, rerun scandrives
|
|
* again just before spinup completion. Beware that
|
|
* after scandrives, we must again wait for selection.
|
|
*/
|
|
if (time_after(ready_date, jiffies + DP->select_delay)) {
|
|
ready_date -= DP->select_delay;
|
|
function = (work_func_t)floppy_start;
|
|
} else
|
|
function = (work_func_t)setup_rw_floppy;
|
|
|
|
/* wait until the floppy is spinning fast enough */
|
|
if (fd_wait_for_completion(ready_date, function))
|
|
return;
|
|
}
|
|
dflags = DRS->flags;
|
|
|
|
if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
|
|
setup_DMA();
|
|
|
|
if (flags & FD_RAW_INTR)
|
|
do_floppy = main_command_interrupt;
|
|
|
|
r = 0;
|
|
for (i = 0; i < raw_cmd->cmd_count; i++)
|
|
r |= output_byte(raw_cmd->cmd[i]);
|
|
|
|
debugt(__func__, "rw_command");
|
|
|
|
if (r) {
|
|
cont->error();
|
|
reset_fdc();
|
|
return;
|
|
}
|
|
|
|
if (!(flags & FD_RAW_INTR)) {
|
|
inr = result();
|
|
cont->interrupt();
|
|
} else if (flags & FD_RAW_NEED_DISK)
|
|
fd_watchdog(NULL);
|
|
}
|
|
|
|
static int blind_seek;
|
|
|
|
/*
|
|
* This is the routine called after every seek (or recalibrate) interrupt
|
|
* from the floppy controller.
|
|
*/
|
|
static void seek_interrupt(void)
|
|
{
|
|
debugt(__func__, "");
|
|
if (inr != 2 || (ST0 & 0xF8) != 0x20) {
|
|
DPRINT("seek failed\n");
|
|
DRS->track = NEED_2_RECAL;
|
|
cont->error();
|
|
cont->redo();
|
|
return;
|
|
}
|
|
if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
|
|
debug_dcl(DP->flags,
|
|
"clearing NEWCHANGE flag because of effective seek\n");
|
|
debug_dcl(DP->flags, "jiffies=%lu\n", jiffies);
|
|
clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
|
|
/* effective seek */
|
|
DRS->select_date = jiffies;
|
|
}
|
|
DRS->track = ST1;
|
|
floppy_ready();
|
|
}
|
|
|
|
static void check_wp(void)
|
|
{
|
|
if (test_bit(FD_VERIFY_BIT, &DRS->flags)) {
|
|
/* check write protection */
|
|
output_byte(FD_GETSTATUS);
|
|
output_byte(UNIT(current_drive));
|
|
if (result() != 1) {
|
|
FDCS->reset = 1;
|
|
return;
|
|
}
|
|
clear_bit(FD_VERIFY_BIT, &DRS->flags);
|
|
clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
|
|
debug_dcl(DP->flags,
|
|
"checking whether disk is write protected\n");
|
|
debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40);
|
|
if (!(ST3 & 0x40))
|
|
set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
|
|
else
|
|
clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
|
|
}
|
|
}
|
|
|
|
static void seek_floppy(void)
|
|
{
|
|
int track;
|
|
|
|
blind_seek = 0;
|
|
|
|
debug_dcl(DP->flags, "calling disk change from %s\n", __func__);
|
|
|
|
if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
|
|
disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
|
|
/* the media changed flag should be cleared after the seek.
|
|
* If it isn't, this means that there is really no disk in
|
|
* the drive.
|
|
*/
|
|
set_bit(FD_DISK_CHANGED_BIT, &DRS->flags);
|
|
cont->done(0);
|
|
cont->redo();
|
|
return;
|
|
}
|
|
if (DRS->track <= NEED_1_RECAL) {
|
|
recalibrate_floppy();
|
|
return;
|
|
} else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
|
|
(raw_cmd->flags & FD_RAW_NEED_DISK) &&
|
|
(DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
|
|
/* we seek to clear the media-changed condition. Does anybody
|
|
* know a more elegant way, which works on all drives? */
|
|
if (raw_cmd->track)
|
|
track = raw_cmd->track - 1;
|
|
else {
|
|
if (DP->flags & FD_SILENT_DCL_CLEAR) {
|
|
set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
|
|
blind_seek = 1;
|
|
raw_cmd->flags |= FD_RAW_NEED_SEEK;
|
|
}
|
|
track = 1;
|
|
}
|
|
} else {
|
|
check_wp();
|
|
if (raw_cmd->track != DRS->track &&
|
|
(raw_cmd->flags & FD_RAW_NEED_SEEK))
|
|
track = raw_cmd->track;
|
|
else {
|
|
setup_rw_floppy();
|
|
return;
|
|
}
|
|
}
|
|
|
|
do_floppy = seek_interrupt;
|
|
output_byte(FD_SEEK);
|
|
output_byte(UNIT(current_drive));
|
|
if (output_byte(track) < 0) {
|
|
reset_fdc();
|
|
return;
|
|
}
|
|
debugt(__func__, "");
|
|
}
|
|
|
|
static void recal_interrupt(void)
|
|
{
|
|
debugt(__func__, "");
|
|
if (inr != 2)
|
|
FDCS->reset = 1;
|
|
else if (ST0 & ST0_ECE) {
|
|
switch (DRS->track) {
|
|
case NEED_1_RECAL:
|
|
debugt(__func__, "need 1 recal");
|
|
/* after a second recalibrate, we still haven't
|
|
* reached track 0. Probably no drive. Raise an
|
|
* error, as failing immediately might upset
|
|
* computers possessed by the Devil :-) */
|
|
cont->error();
|
|
cont->redo();
|
|
return;
|
|
case NEED_2_RECAL:
|
|
debugt(__func__, "need 2 recal");
|
|
/* If we already did a recalibrate,
|
|
* and we are not at track 0, this
|
|
* means we have moved. (The only way
|
|
* not to move at recalibration is to
|
|
* be already at track 0.) Clear the
|
|
* new change flag */
|
|
debug_dcl(DP->flags,
|
|
"clearing NEWCHANGE flag because of second recalibrate\n");
|
|
|
|
clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
|
|
DRS->select_date = jiffies;
|
|
/* fall through */
|
|
default:
|
|
debugt(__func__, "default");
|
|
/* Recalibrate moves the head by at
|
|
* most 80 steps. If after one
|
|
* recalibrate we don't have reached
|
|
* track 0, this might mean that we
|
|
* started beyond track 80. Try
|
|
* again. */
|
|
DRS->track = NEED_1_RECAL;
|
|
break;
|
|
}
|
|
} else
|
|
DRS->track = ST1;
|
|
floppy_ready();
|
|
}
|
|
|
|
static void print_result(char *message, int inr)
|
|
{
|
|
int i;
|
|
|
|
DPRINT("%s ", message);
|
|
if (inr >= 0)
|
|
for (i = 0; i < inr; i++)
|
|
pr_cont("repl[%d]=%x ", i, reply_buffer[i]);
|
|
pr_cont("\n");
|
|
}
|
|
|
|
/* interrupt handler. Note that this can be called externally on the Sparc */
|
|
irqreturn_t floppy_interrupt(int irq, void *dev_id)
|
|
{
|
|
int do_print;
|
|
unsigned long f;
|
|
void (*handler)(void) = do_floppy;
|
|
|
|
lasthandler = handler;
|
|
interruptjiffies = jiffies;
|
|
|
|
f = claim_dma_lock();
|
|
fd_disable_dma();
|
|
release_dma_lock(f);
|
|
|
|
do_floppy = NULL;
|
|
if (fdc >= N_FDC || FDCS->address == -1) {
|
|
/* we don't even know which FDC is the culprit */
|
|
pr_info("DOR0=%x\n", fdc_state[0].dor);
|
|
pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
|
|
pr_info("handler=%pf\n", handler);
|
|
is_alive(__func__, "bizarre fdc");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
FDCS->reset = 0;
|
|
/* We have to clear the reset flag here, because apparently on boxes
|
|
* with level triggered interrupts (PS/2, Sparc, ...), it is needed to
|
|
* emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
|
|
* emission of the SENSEI's.
|
|
* It is OK to emit floppy commands because we are in an interrupt
|
|
* handler here, and thus we have to fear no interference of other
|
|
* activity.
|
|
*/
|
|
|
|
do_print = !handler && print_unex && initialized;
|
|
|
|
inr = result();
|
|
if (do_print)
|
|
print_result("unexpected interrupt", inr);
|
|
if (inr == 0) {
|
|
int max_sensei = 4;
|
|
do {
|
|
output_byte(FD_SENSEI);
|
|
inr = result();
|
|
if (do_print)
|
|
print_result("sensei", inr);
|
|
max_sensei--;
|
|
} while ((ST0 & 0x83) != UNIT(current_drive) &&
|
|
inr == 2 && max_sensei);
|
|
}
|
|
if (!handler) {
|
|
FDCS->reset = 1;
|
|
return IRQ_NONE;
|
|
}
|
|
schedule_bh(handler);
|
|
is_alive(__func__, "normal interrupt end");
|
|
|
|
/* FIXME! Was it really for us? */
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void recalibrate_floppy(void)
|
|
{
|
|
debugt(__func__, "");
|
|
do_floppy = recal_interrupt;
|
|
output_byte(FD_RECALIBRATE);
|
|
if (output_byte(UNIT(current_drive)) < 0)
|
|
reset_fdc();
|
|
}
|
|
|
|
/*
|
|
* Must do 4 FD_SENSEIs after reset because of ``drive polling''.
|
|
*/
|
|
static void reset_interrupt(void)
|
|
{
|
|
debugt(__func__, "");
|
|
result(); /* get the status ready for set_fdc */
|
|
if (FDCS->reset) {
|
|
pr_info("reset set in interrupt, calling %pf\n", cont->error);
|
|
cont->error(); /* a reset just after a reset. BAD! */
|
|
}
|
|
cont->redo();
|
|
}
|
|
|
|
/*
|
|
* reset is done by pulling bit 2 of DOR low for a while (old FDCs),
|
|
* or by setting the self clearing bit 7 of STATUS (newer FDCs)
|
|
*/
|
|
static void reset_fdc(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
do_floppy = reset_interrupt;
|
|
FDCS->reset = 0;
|
|
reset_fdc_info(0);
|
|
|
|
/* Pseudo-DMA may intercept 'reset finished' interrupt. */
|
|
/* Irrelevant for systems with true DMA (i386). */
|
|
|
|
flags = claim_dma_lock();
|
|
fd_disable_dma();
|
|
release_dma_lock(flags);
|
|
|
|
if (FDCS->version >= FDC_82072A)
|
|
fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
|
|
else {
|
|
fd_outb(FDCS->dor & ~0x04, FD_DOR);
|
|
udelay(FD_RESET_DELAY);
|
|
fd_outb(FDCS->dor, FD_DOR);
|
|
}
|
|
}
|
|
|
|
static void show_floppy(void)
|
|
{
|
|
int i;
|
|
|
|
pr_info("\n");
|
|
pr_info("floppy driver state\n");
|
|
pr_info("-------------------\n");
|
|
pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n",
|
|
jiffies, interruptjiffies, jiffies - interruptjiffies,
|
|
lasthandler);
|
|
|
|
pr_info("timeout_message=%s\n", timeout_message);
|
|
pr_info("last output bytes:\n");
|
|
for (i = 0; i < OLOGSIZE; i++)
|
|
pr_info("%2x %2x %lu\n",
|
|
output_log[(i + output_log_pos) % OLOGSIZE].data,
|
|
output_log[(i + output_log_pos) % OLOGSIZE].status,
|
|
output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
|
|
pr_info("last result at %lu\n", resultjiffies);
|
|
pr_info("last redo_fd_request at %lu\n", lastredo);
|
|
print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
|
|
reply_buffer, resultsize, true);
|
|
|
|
pr_info("status=%x\n", fd_inb(FD_STATUS));
|
|
pr_info("fdc_busy=%lu\n", fdc_busy);
|
|
if (do_floppy)
|
|
pr_info("do_floppy=%pf\n", do_floppy);
|
|
if (work_pending(&floppy_work))
|
|
pr_info("floppy_work.func=%pf\n", floppy_work.func);
|
|
if (delayed_work_pending(&fd_timer))
|
|
pr_info("delayed work.function=%p expires=%ld\n",
|
|
fd_timer.work.func,
|
|
fd_timer.timer.expires - jiffies);
|
|
if (delayed_work_pending(&fd_timeout))
|
|
pr_info("timer_function=%p expires=%ld\n",
|
|
fd_timeout.work.func,
|
|
fd_timeout.timer.expires - jiffies);
|
|
|
|
pr_info("cont=%p\n", cont);
|
|
pr_info("current_req=%p\n", current_req);
|
|
pr_info("command_status=%d\n", command_status);
|
|
pr_info("\n");
|
|
}
|
|
|
|
static void floppy_shutdown(struct work_struct *arg)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (initialized)
|
|
show_floppy();
|
|
cancel_activity();
|
|
|
|
flags = claim_dma_lock();
|
|
fd_disable_dma();
|
|
release_dma_lock(flags);
|
|
|
|
/* avoid dma going to a random drive after shutdown */
|
|
|
|
if (initialized)
|
|
DPRINT("floppy timeout called\n");
|
|
FDCS->reset = 1;
|
|
if (cont) {
|
|
cont->done(0);
|
|
cont->redo(); /* this will recall reset when needed */
|
|
} else {
|
|
pr_info("no cont in shutdown!\n");
|
|
process_fd_request();
|
|
}
|
|
is_alive(__func__, "");
|
|
}
|
|
|
|
/* start motor, check media-changed condition and write protection */
|
|
static int start_motor(void (*function)(void))
|
|
{
|
|
int mask;
|
|
int data;
|
|
|
|
mask = 0xfc;
|
|
data = UNIT(current_drive);
|
|
if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
|
|
if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
|
|
set_debugt();
|
|
/* no read since this drive is running */
|
|
DRS->first_read_date = 0;
|
|
/* note motor start time if motor is not yet running */
|
|
DRS->spinup_date = jiffies;
|
|
data |= (0x10 << UNIT(current_drive));
|
|
}
|
|
} else if (FDCS->dor & (0x10 << UNIT(current_drive)))
|
|
mask &= ~(0x10 << UNIT(current_drive));
|
|
|
|
/* starts motor and selects floppy */
|
|
del_timer(motor_off_timer + current_drive);
|
|
set_dor(fdc, mask, data);
|
|
|
|
/* wait_for_completion also schedules reset if needed. */
|
|
return fd_wait_for_completion(DRS->select_date + DP->select_delay,
|
|
(work_func_t)function);
|
|
}
|
|
|
|
static void floppy_ready(void)
|
|
{
|
|
if (FDCS->reset) {
|
|
reset_fdc();
|
|
return;
|
|
}
|
|
if (start_motor(floppy_ready))
|
|
return;
|
|
if (fdc_dtr())
|
|
return;
|
|
|
|
debug_dcl(DP->flags, "calling disk change from floppy_ready\n");
|
|
if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
|
|
disk_change(current_drive) && !DP->select_delay)
|
|
twaddle(); /* this clears the dcl on certain
|
|
* drive/controller combinations */
|
|
|
|
#ifdef fd_chose_dma_mode
|
|
if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) {
|
|
unsigned long flags = claim_dma_lock();
|
|
fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length);
|
|
release_dma_lock(flags);
|
|
}
|
|
#endif
|
|
|
|
if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) {
|
|
perpendicular_mode();
|
|
fdc_specify(); /* must be done here because of hut, hlt ... */
|
|
seek_floppy();
|
|
} else {
|
|
if ((raw_cmd->flags & FD_RAW_READ) ||
|
|
(raw_cmd->flags & FD_RAW_WRITE))
|
|
fdc_specify();
|
|
setup_rw_floppy();
|
|
}
|
|
}
|
|
|
|
static void floppy_start(void)
|
|
{
|
|
reschedule_timeout(current_reqD, "floppy start");
|
|
|
|
scandrives();
|
|
debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n");
|
|
set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
|
|
floppy_ready();
|
|
}
|
|
|
|
/*
|
|
* ========================================================================
|
|
* here ends the bottom half. Exported routines are:
|
|
* floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
|
|
* start_motor, reset_fdc, reset_fdc_info, interpret_errors.
|
|
* Initialization also uses output_byte, result, set_dor, floppy_interrupt
|
|
* and set_dor.
|
|
* ========================================================================
|
|
*/
|
|
/*
|
|
* General purpose continuations.
|
|
* ==============================
|
|
*/
|
|
|
|
static void do_wakeup(void)
|
|
{
|
|
reschedule_timeout(MAXTIMEOUT, "do wakeup");
|
|
cont = NULL;
|
|
command_status += 2;
|
|
wake_up(&command_done);
|
|
}
|
|
|
|
static const struct cont_t wakeup_cont = {
|
|
.interrupt = empty,
|
|
.redo = do_wakeup,
|
|
.error = empty,
|
|
.done = (done_f)empty
|
|
};
|
|
|
|
static const struct cont_t intr_cont = {
|
|
.interrupt = empty,
|
|
.redo = process_fd_request,
|
|
.error = empty,
|
|
.done = (done_f)empty
|
|
};
|
|
|
|
static int wait_til_done(void (*handler)(void), bool interruptible)
|
|
{
|
|
int ret;
|
|
|
|
schedule_bh(handler);
|
|
|
|
if (interruptible)
|
|
wait_event_interruptible(command_done, command_status >= 2);
|
|
else
|
|
wait_event(command_done, command_status >= 2);
|
|
|
|
if (command_status < 2) {
|
|
cancel_activity();
|
|
cont = &intr_cont;
|
|
reset_fdc();
|
|
return -EINTR;
|
|
}
|
|
|
|
if (FDCS->reset)
|
|
command_status = FD_COMMAND_ERROR;
|
|
if (command_status == FD_COMMAND_OKAY)
|
|
ret = 0;
|
|
else
|
|
ret = -EIO;
|
|
command_status = FD_COMMAND_NONE;
|
|
return ret;
|
|
}
|
|
|
|
static void generic_done(int result)
|
|
{
|
|
command_status = result;
|
|
cont = &wakeup_cont;
|
|
}
|
|
|
|
static void generic_success(void)
|
|
{
|
|
cont->done(1);
|
|
}
|
|
|
|
static void generic_failure(void)
|
|
{
|
|
cont->done(0);
|
|
}
|
|
|
|
static void success_and_wakeup(void)
|
|
{
|
|
generic_success();
|
|
cont->redo();
|
|
}
|
|
|
|
/*
|
|
* formatting and rw support.
|
|
* ==========================
|
|
*/
|
|
|
|
static int next_valid_format(void)
|
|
{
|
|
int probed_format;
|
|
|
|
probed_format = DRS->probed_format;
|
|
while (1) {
|
|
if (probed_format >= 8 || !DP->autodetect[probed_format]) {
|
|
DRS->probed_format = 0;
|
|
return 1;
|
|
}
|
|
if (floppy_type[DP->autodetect[probed_format]].sect) {
|
|
DRS->probed_format = probed_format;
|
|
return 0;
|
|
}
|
|
probed_format++;
|
|
}
|
|
}
|
|
|
|
static void bad_flp_intr(void)
|
|
{
|
|
int err_count;
|
|
|
|
if (probing) {
|
|
DRS->probed_format++;
|
|
if (!next_valid_format())
|
|
return;
|
|
}
|
|
err_count = ++(*errors);
|
|
INFBOUND(DRWE->badness, err_count);
|
|
if (err_count > DP->max_errors.abort)
|
|
cont->done(0);
|
|
if (err_count > DP->max_errors.reset)
|
|
FDCS->reset = 1;
|
|
else if (err_count > DP->max_errors.recal)
|
|
DRS->track = NEED_2_RECAL;
|
|
}
|
|
|
|
static void set_floppy(int drive)
|
|
{
|
|
int type = ITYPE(UDRS->fd_device);
|
|
|
|
if (type)
|
|
_floppy = floppy_type + type;
|
|
else
|
|
_floppy = current_type[drive];
|
|
}
|
|
|
|
/*
|
|
* formatting support.
|
|
* ===================
|
|
*/
|
|
static void format_interrupt(void)
|
|
{
|
|
switch (interpret_errors()) {
|
|
case 1:
|
|
cont->error();
|
|
case 2:
|
|
break;
|
|
case 0:
|
|
cont->done(1);
|
|
}
|
|
cont->redo();
|
|
}
|
|
|
|
#define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1))
|
|
#define CT(x) ((x) | 0xc0)
|
|
|
|
static void setup_format_params(int track)
|
|
{
|
|
int n;
|
|
int il;
|
|
int count;
|
|
int head_shift;
|
|
int track_shift;
|
|
struct fparm {
|
|
unsigned char track, head, sect, size;
|
|
} *here = (struct fparm *)floppy_track_buffer;
|
|
|
|
raw_cmd = &default_raw_cmd;
|
|
raw_cmd->track = track;
|
|
|
|
raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
|
|
FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK);
|
|
raw_cmd->rate = _floppy->rate & 0x43;
|
|
raw_cmd->cmd_count = NR_F;
|
|
COMMAND = FM_MODE(_floppy, FD_FORMAT);
|
|
DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head);
|
|
F_SIZECODE = FD_SIZECODE(_floppy);
|
|
F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
|
|
F_GAP = _floppy->fmt_gap;
|
|
F_FILL = FD_FILL_BYTE;
|
|
|
|
raw_cmd->kernel_data = floppy_track_buffer;
|
|
raw_cmd->length = 4 * F_SECT_PER_TRACK;
|
|
|
|
/* allow for about 30ms for data transport per track */
|
|
head_shift = (F_SECT_PER_TRACK + 5) / 6;
|
|
|
|
/* a ``cylinder'' is two tracks plus a little stepping time */
|
|
track_shift = 2 * head_shift + 3;
|
|
|
|
/* position of logical sector 1 on this track */
|
|
n = (track_shift * format_req.track + head_shift * format_req.head)
|
|
% F_SECT_PER_TRACK;
|
|
|
|
/* determine interleave */
|
|
il = 1;
|
|
if (_floppy->fmt_gap < 0x22)
|
|
il++;
|
|
|
|
/* initialize field */
|
|
for (count = 0; count < F_SECT_PER_TRACK; ++count) {
|
|
here[count].track = format_req.track;
|
|
here[count].head = format_req.head;
|
|
here[count].sect = 0;
|
|
here[count].size = F_SIZECODE;
|
|
}
|
|
/* place logical sectors */
|
|
for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
|
|
here[n].sect = count;
|
|
n = (n + il) % F_SECT_PER_TRACK;
|
|
if (here[n].sect) { /* sector busy, find next free sector */
|
|
++n;
|
|
if (n >= F_SECT_PER_TRACK) {
|
|
n -= F_SECT_PER_TRACK;
|
|
while (here[n].sect)
|
|
++n;
|
|
}
|
|
}
|
|
}
|
|
if (_floppy->stretch & FD_SECTBASEMASK) {
|
|
for (count = 0; count < F_SECT_PER_TRACK; count++)
|
|
here[count].sect += FD_SECTBASE(_floppy) - 1;
|
|
}
|
|
}
|
|
|
|
static void redo_format(void)
|
|
{
|
|
buffer_track = -1;
|
|
setup_format_params(format_req.track << STRETCH(_floppy));
|
|
floppy_start();
|
|
debugt(__func__, "queue format request");
|
|
}
|
|
|
|
static const struct cont_t format_cont = {
|
|
.interrupt = format_interrupt,
|
|
.redo = redo_format,
|
|
.error = bad_flp_intr,
|
|
.done = generic_done
|
|
};
|
|
|
|
static int do_format(int drive, struct format_descr *tmp_format_req)
|
|
{
|
|
int ret;
|
|
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
|
|
set_floppy(drive);
|
|
if (!_floppy ||
|
|
_floppy->track > DP->tracks ||
|
|
tmp_format_req->track >= _floppy->track ||
|
|
tmp_format_req->head >= _floppy->head ||
|
|
(_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
|
|
!_floppy->fmt_gap) {
|
|
process_fd_request();
|
|
return -EINVAL;
|
|
}
|
|
format_req = *tmp_format_req;
|
|
format_errors = 0;
|
|
cont = &format_cont;
|
|
errors = &format_errors;
|
|
ret = wait_til_done(redo_format, true);
|
|
if (ret == -EINTR)
|
|
return -EINTR;
|
|
process_fd_request();
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Buffer read/write and support
|
|
* =============================
|
|
*/
|
|
|
|
static void floppy_end_request(struct request *req, int error)
|
|
{
|
|
unsigned int nr_sectors = current_count_sectors;
|
|
unsigned int drive = (unsigned long)req->rq_disk->private_data;
|
|
|
|
/* current_count_sectors can be zero if transfer failed */
|
|
if (error)
|
|
nr_sectors = blk_rq_cur_sectors(req);
|
|
if (__blk_end_request(req, error, nr_sectors << 9))
|
|
return;
|
|
|
|
/* We're done with the request */
|
|
floppy_off(drive);
|
|
current_req = NULL;
|
|
}
|
|
|
|
/* new request_done. Can handle physical sectors which are smaller than a
|
|
* logical buffer */
|
|
static void request_done(int uptodate)
|
|
{
|
|
struct request *req = current_req;
|
|
struct request_queue *q;
|
|
unsigned long flags;
|
|
int block;
|
|
char msg[sizeof("request done ") + sizeof(int) * 3];
|
|
|
|
probing = 0;
|
|
snprintf(msg, sizeof(msg), "request done %d", uptodate);
|
|
reschedule_timeout(MAXTIMEOUT, msg);
|
|
|
|
if (!req) {
|
|
pr_info("floppy.c: no request in request_done\n");
|
|
return;
|
|
}
|
|
|
|
q = req->q;
|
|
|
|
if (uptodate) {
|
|
/* maintain values for invalidation on geometry
|
|
* change */
|
|
block = current_count_sectors + blk_rq_pos(req);
|
|
INFBOUND(DRS->maxblock, block);
|
|
if (block > _floppy->sect)
|
|
DRS->maxtrack = 1;
|
|
|
|
/* unlock chained buffers */
|
|
spin_lock_irqsave(q->queue_lock, flags);
|
|
floppy_end_request(req, 0);
|
|
spin_unlock_irqrestore(q->queue_lock, flags);
|
|
} else {
|
|
if (rq_data_dir(req) == WRITE) {
|
|
/* record write error information */
|
|
DRWE->write_errors++;
|
|
if (DRWE->write_errors == 1) {
|
|
DRWE->first_error_sector = blk_rq_pos(req);
|
|
DRWE->first_error_generation = DRS->generation;
|
|
}
|
|
DRWE->last_error_sector = blk_rq_pos(req);
|
|
DRWE->last_error_generation = DRS->generation;
|
|
}
|
|
spin_lock_irqsave(q->queue_lock, flags);
|
|
floppy_end_request(req, -EIO);
|
|
spin_unlock_irqrestore(q->queue_lock, flags);
|
|
}
|
|
}
|
|
|
|
/* Interrupt handler evaluating the result of the r/w operation */
|
|
static void rw_interrupt(void)
|
|
{
|
|
int eoc;
|
|
int ssize;
|
|
int heads;
|
|
int nr_sectors;
|
|
|
|
if (R_HEAD >= 2) {
|
|
/* some Toshiba floppy controllers occasionnally seem to
|
|
* return bogus interrupts after read/write operations, which
|
|
* can be recognized by a bad head number (>= 2) */
|
|
return;
|
|
}
|
|
|
|
if (!DRS->first_read_date)
|
|
DRS->first_read_date = jiffies;
|
|
|
|
nr_sectors = 0;
|
|
ssize = DIV_ROUND_UP(1 << SIZECODE, 4);
|
|
|
|
if (ST1 & ST1_EOC)
|
|
eoc = 1;
|
|
else
|
|
eoc = 0;
|
|
|
|
if (COMMAND & 0x80)
|
|
heads = 2;
|
|
else
|
|
heads = 1;
|
|
|
|
nr_sectors = (((R_TRACK - TRACK) * heads +
|
|
R_HEAD - HEAD) * SECT_PER_TRACK +
|
|
R_SECTOR - SECTOR + eoc) << SIZECODE >> 2;
|
|
|
|
if (nr_sectors / ssize >
|
|
DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) {
|
|
DPRINT("long rw: %x instead of %lx\n",
|
|
nr_sectors, current_count_sectors);
|
|
pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR);
|
|
pr_info("rh=%d h=%d\n", R_HEAD, HEAD);
|
|
pr_info("rt=%d t=%d\n", R_TRACK, TRACK);
|
|
pr_info("heads=%d eoc=%d\n", heads, eoc);
|
|
pr_info("spt=%d st=%d ss=%d\n",
|
|
SECT_PER_TRACK, fsector_t, ssize);
|
|
pr_info("in_sector_offset=%d\n", in_sector_offset);
|
|
}
|
|
|
|
nr_sectors -= in_sector_offset;
|
|
INFBOUND(nr_sectors, 0);
|
|
SUPBOUND(current_count_sectors, nr_sectors);
|
|
|
|
switch (interpret_errors()) {
|
|
case 2:
|
|
cont->redo();
|
|
return;
|
|
case 1:
|
|
if (!current_count_sectors) {
|
|
cont->error();
|
|
cont->redo();
|
|
return;
|
|
}
|
|
break;
|
|
case 0:
|
|
if (!current_count_sectors) {
|
|
cont->redo();
|
|
return;
|
|
}
|
|
current_type[current_drive] = _floppy;
|
|
floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
|
|
break;
|
|
}
|
|
|
|
if (probing) {
|
|
if (DP->flags & FTD_MSG)
|
|
DPRINT("Auto-detected floppy type %s in fd%d\n",
|
|
_floppy->name, current_drive);
|
|
current_type[current_drive] = _floppy;
|
|
floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
|
|
probing = 0;
|
|
}
|
|
|
|
if (CT(COMMAND) != FD_READ ||
|
|
raw_cmd->kernel_data == current_req->buffer) {
|
|
/* transfer directly from buffer */
|
|
cont->done(1);
|
|
} else if (CT(COMMAND) == FD_READ) {
|
|
buffer_track = raw_cmd->track;
|
|
buffer_drive = current_drive;
|
|
INFBOUND(buffer_max, nr_sectors + fsector_t);
|
|
}
|
|
cont->redo();
|
|
}
|
|
|
|
/* Compute maximal contiguous buffer size. */
|
|
static int buffer_chain_size(void)
|
|
{
|
|
struct bio_vec *bv;
|
|
int size;
|
|
struct req_iterator iter;
|
|
char *base;
|
|
|
|
base = bio_data(current_req->bio);
|
|
size = 0;
|
|
|
|
rq_for_each_segment(bv, current_req, iter) {
|
|
if (page_address(bv->bv_page) + bv->bv_offset != base + size)
|
|
break;
|
|
|
|
size += bv->bv_len;
|
|
}
|
|
|
|
return size >> 9;
|
|
}
|
|
|
|
/* Compute the maximal transfer size */
|
|
static int transfer_size(int ssize, int max_sector, int max_size)
|
|
{
|
|
SUPBOUND(max_sector, fsector_t + max_size);
|
|
|
|
/* alignment */
|
|
max_sector -= (max_sector % _floppy->sect) % ssize;
|
|
|
|
/* transfer size, beginning not aligned */
|
|
current_count_sectors = max_sector - fsector_t;
|
|
|
|
return max_sector;
|
|
}
|
|
|
|
/*
|
|
* Move data from/to the track buffer to/from the buffer cache.
|
|
*/
|
|
static void copy_buffer(int ssize, int max_sector, int max_sector_2)
|
|
{
|
|
int remaining; /* number of transferred 512-byte sectors */
|
|
struct bio_vec *bv;
|
|
char *buffer;
|
|
char *dma_buffer;
|
|
int size;
|
|
struct req_iterator iter;
|
|
|
|
max_sector = transfer_size(ssize,
|
|
min(max_sector, max_sector_2),
|
|
blk_rq_sectors(current_req));
|
|
|
|
if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
|
|
buffer_max > fsector_t + blk_rq_sectors(current_req))
|
|
current_count_sectors = min_t(int, buffer_max - fsector_t,
|
|
blk_rq_sectors(current_req));
|
|
|
|
remaining = current_count_sectors << 9;
|
|
if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
|
|
DPRINT("in copy buffer\n");
|
|
pr_info("current_count_sectors=%ld\n", current_count_sectors);
|
|
pr_info("remaining=%d\n", remaining >> 9);
|
|
pr_info("current_req->nr_sectors=%u\n",
|
|
blk_rq_sectors(current_req));
|
|
pr_info("current_req->current_nr_sectors=%u\n",
|
|
blk_rq_cur_sectors(current_req));
|
|
pr_info("max_sector=%d\n", max_sector);
|
|
pr_info("ssize=%d\n", ssize);
|
|
}
|
|
|
|
buffer_max = max(max_sector, buffer_max);
|
|
|
|
dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
|
|
|
|
size = blk_rq_cur_bytes(current_req);
|
|
|
|
rq_for_each_segment(bv, current_req, iter) {
|
|
if (!remaining)
|
|
break;
|
|
|
|
size = bv->bv_len;
|
|
SUPBOUND(size, remaining);
|
|
|
|
buffer = page_address(bv->bv_page) + bv->bv_offset;
|
|
if (dma_buffer + size >
|
|
floppy_track_buffer + (max_buffer_sectors << 10) ||
|
|
dma_buffer < floppy_track_buffer) {
|
|
DPRINT("buffer overrun in copy buffer %d\n",
|
|
(int)((floppy_track_buffer - dma_buffer) >> 9));
|
|
pr_info("fsector_t=%d buffer_min=%d\n",
|
|
fsector_t, buffer_min);
|
|
pr_info("current_count_sectors=%ld\n",
|
|
current_count_sectors);
|
|
if (CT(COMMAND) == FD_READ)
|
|
pr_info("read\n");
|
|
if (CT(COMMAND) == FD_WRITE)
|
|
pr_info("write\n");
|
|
break;
|
|
}
|
|
if (((unsigned long)buffer) % 512)
|
|
DPRINT("%p buffer not aligned\n", buffer);
|
|
|
|
if (CT(COMMAND) == FD_READ)
|
|
memcpy(buffer, dma_buffer, size);
|
|
else
|
|
memcpy(dma_buffer, buffer, size);
|
|
|
|
remaining -= size;
|
|
dma_buffer += size;
|
|
}
|
|
if (remaining) {
|
|
if (remaining > 0)
|
|
max_sector -= remaining >> 9;
|
|
DPRINT("weirdness: remaining %d\n", remaining >> 9);
|
|
}
|
|
}
|
|
|
|
/* work around a bug in pseudo DMA
|
|
* (on some FDCs) pseudo DMA does not stop when the CPU stops
|
|
* sending data. Hence we need a different way to signal the
|
|
* transfer length: We use SECT_PER_TRACK. Unfortunately, this
|
|
* does not work with MT, hence we can only transfer one head at
|
|
* a time
|
|
*/
|
|
static void virtualdmabug_workaround(void)
|
|
{
|
|
int hard_sectors;
|
|
int end_sector;
|
|
|
|
if (CT(COMMAND) == FD_WRITE) {
|
|
COMMAND &= ~0x80; /* switch off multiple track mode */
|
|
|
|
hard_sectors = raw_cmd->length >> (7 + SIZECODE);
|
|
end_sector = SECTOR + hard_sectors - 1;
|
|
if (end_sector > SECT_PER_TRACK) {
|
|
pr_info("too many sectors %d > %d\n",
|
|
end_sector, SECT_PER_TRACK);
|
|
return;
|
|
}
|
|
SECT_PER_TRACK = end_sector;
|
|
/* make sure SECT_PER_TRACK
|
|
* points to end of transfer */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Formulate a read/write request.
|
|
* this routine decides where to load the data (directly to buffer, or to
|
|
* tmp floppy area), how much data to load (the size of the buffer, the whole
|
|
* track, or a single sector)
|
|
* All floppy_track_buffer handling goes in here. If we ever add track buffer
|
|
* allocation on the fly, it should be done here. No other part should need
|
|
* modification.
|
|
*/
|
|
|
|
static int make_raw_rw_request(void)
|
|
{
|
|
int aligned_sector_t;
|
|
int max_sector;
|
|
int max_size;
|
|
int tracksize;
|
|
int ssize;
|
|
|
|
if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n"))
|
|
return 0;
|
|
|
|
set_fdc((long)current_req->rq_disk->private_data);
|
|
|
|
raw_cmd = &default_raw_cmd;
|
|
raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
|
|
FD_RAW_NEED_SEEK;
|
|
raw_cmd->cmd_count = NR_RW;
|
|
if (rq_data_dir(current_req) == READ) {
|
|
raw_cmd->flags |= FD_RAW_READ;
|
|
COMMAND = FM_MODE(_floppy, FD_READ);
|
|
} else if (rq_data_dir(current_req) == WRITE) {
|
|
raw_cmd->flags |= FD_RAW_WRITE;
|
|
COMMAND = FM_MODE(_floppy, FD_WRITE);
|
|
} else {
|
|
DPRINT("%s: unknown command\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
max_sector = _floppy->sect * _floppy->head;
|
|
|
|
TRACK = (int)blk_rq_pos(current_req) / max_sector;
|
|
fsector_t = (int)blk_rq_pos(current_req) % max_sector;
|
|
if (_floppy->track && TRACK >= _floppy->track) {
|
|
if (blk_rq_cur_sectors(current_req) & 1) {
|
|
current_count_sectors = 1;
|
|
return 1;
|
|
} else
|
|
return 0;
|
|
}
|
|
HEAD = fsector_t / _floppy->sect;
|
|
|
|
if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) ||
|
|
test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) &&
|
|
fsector_t < _floppy->sect)
|
|
max_sector = _floppy->sect;
|
|
|
|
/* 2M disks have phantom sectors on the first track */
|
|
if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) {
|
|
max_sector = 2 * _floppy->sect / 3;
|
|
if (fsector_t >= max_sector) {
|
|
current_count_sectors =
|
|
min_t(int, _floppy->sect - fsector_t,
|
|
blk_rq_sectors(current_req));
|
|
return 1;
|
|
}
|
|
SIZECODE = 2;
|
|
} else
|
|
SIZECODE = FD_SIZECODE(_floppy);
|
|
raw_cmd->rate = _floppy->rate & 0x43;
|
|
if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2)
|
|
raw_cmd->rate = 1;
|
|
|
|
if (SIZECODE)
|
|
SIZECODE2 = 0xff;
|
|
else
|
|
SIZECODE2 = 0x80;
|
|
raw_cmd->track = TRACK << STRETCH(_floppy);
|
|
DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD);
|
|
GAP = _floppy->gap;
|
|
ssize = DIV_ROUND_UP(1 << SIZECODE, 4);
|
|
SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
|
|
SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) +
|
|
FD_SECTBASE(_floppy);
|
|
|
|
/* tracksize describes the size which can be filled up with sectors
|
|
* of size ssize.
|
|
*/
|
|
tracksize = _floppy->sect - _floppy->sect % ssize;
|
|
if (tracksize < _floppy->sect) {
|
|
SECT_PER_TRACK++;
|
|
if (tracksize <= fsector_t % _floppy->sect)
|
|
SECTOR--;
|
|
|
|
/* if we are beyond tracksize, fill up using smaller sectors */
|
|
while (tracksize <= fsector_t % _floppy->sect) {
|
|
while (tracksize + ssize > _floppy->sect) {
|
|
SIZECODE--;
|
|
ssize >>= 1;
|
|
}
|
|
SECTOR++;
|
|
SECT_PER_TRACK++;
|
|
tracksize += ssize;
|
|
}
|
|
max_sector = HEAD * _floppy->sect + tracksize;
|
|
} else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
|
|
max_sector = _floppy->sect;
|
|
} else if (!HEAD && CT(COMMAND) == FD_WRITE) {
|
|
/* for virtual DMA bug workaround */
|
|
max_sector = _floppy->sect;
|
|
}
|
|
|
|
in_sector_offset = (fsector_t % _floppy->sect) % ssize;
|
|
aligned_sector_t = fsector_t - in_sector_offset;
|
|
max_size = blk_rq_sectors(current_req);
|
|
if ((raw_cmd->track == buffer_track) &&
|
|
(current_drive == buffer_drive) &&
|
|
(fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
|
|
/* data already in track buffer */
|
|
if (CT(COMMAND) == FD_READ) {
|
|
copy_buffer(1, max_sector, buffer_max);
|
|
return 1;
|
|
}
|
|
} else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
|
|
if (CT(COMMAND) == FD_WRITE) {
|
|
unsigned int sectors;
|
|
|
|
sectors = fsector_t + blk_rq_sectors(current_req);
|
|
if (sectors > ssize && sectors < ssize + ssize)
|
|
max_size = ssize + ssize;
|
|
else
|
|
max_size = ssize;
|
|
}
|
|
raw_cmd->flags &= ~FD_RAW_WRITE;
|
|
raw_cmd->flags |= FD_RAW_READ;
|
|
COMMAND = FM_MODE(_floppy, FD_READ);
|
|
} else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
|
|
unsigned long dma_limit;
|
|
int direct, indirect;
|
|
|
|
indirect =
|
|
transfer_size(ssize, max_sector,
|
|
max_buffer_sectors * 2) - fsector_t;
|
|
|
|
/*
|
|
* Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
|
|
* on a 64 bit machine!
|
|
*/
|
|
max_size = buffer_chain_size();
|
|
dma_limit = (MAX_DMA_ADDRESS -
|
|
((unsigned long)current_req->buffer)) >> 9;
|
|
if ((unsigned long)max_size > dma_limit)
|
|
max_size = dma_limit;
|
|
/* 64 kb boundaries */
|
|
if (CROSS_64KB(current_req->buffer, max_size << 9))
|
|
max_size = (K_64 -
|
|
((unsigned long)current_req->buffer) %
|
|
K_64) >> 9;
|
|
direct = transfer_size(ssize, max_sector, max_size) - fsector_t;
|
|
/*
|
|
* We try to read tracks, but if we get too many errors, we
|
|
* go back to reading just one sector at a time.
|
|
*
|
|
* This means we should be able to read a sector even if there
|
|
* are other bad sectors on this track.
|
|
*/
|
|
if (!direct ||
|
|
(indirect * 2 > direct * 3 &&
|
|
*errors < DP->max_errors.read_track &&
|
|
((!probing ||
|
|
(DP->read_track & (1 << DRS->probed_format)))))) {
|
|
max_size = blk_rq_sectors(current_req);
|
|
} else {
|
|
raw_cmd->kernel_data = current_req->buffer;
|
|
raw_cmd->length = current_count_sectors << 9;
|
|
if (raw_cmd->length == 0) {
|
|
DPRINT("%s: zero dma transfer attempted\n", __func__);
|
|
DPRINT("indirect=%d direct=%d fsector_t=%d\n",
|
|
indirect, direct, fsector_t);
|
|
return 0;
|
|
}
|
|
virtualdmabug_workaround();
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
if (CT(COMMAND) == FD_READ)
|
|
max_size = max_sector; /* unbounded */
|
|
|
|
/* claim buffer track if needed */
|
|
if (buffer_track != raw_cmd->track || /* bad track */
|
|
buffer_drive != current_drive || /* bad drive */
|
|
fsector_t > buffer_max ||
|
|
fsector_t < buffer_min ||
|
|
((CT(COMMAND) == FD_READ ||
|
|
(!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
|
|
max_sector > 2 * max_buffer_sectors + buffer_min &&
|
|
max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) {
|
|
/* not enough space */
|
|
buffer_track = -1;
|
|
buffer_drive = current_drive;
|
|
buffer_max = buffer_min = aligned_sector_t;
|
|
}
|
|
raw_cmd->kernel_data = floppy_track_buffer +
|
|
((aligned_sector_t - buffer_min) << 9);
|
|
|
|
if (CT(COMMAND) == FD_WRITE) {
|
|
/* copy write buffer to track buffer.
|
|
* if we get here, we know that the write
|
|
* is either aligned or the data already in the buffer
|
|
* (buffer will be overwritten) */
|
|
if (in_sector_offset && buffer_track == -1)
|
|
DPRINT("internal error offset !=0 on write\n");
|
|
buffer_track = raw_cmd->track;
|
|
buffer_drive = current_drive;
|
|
copy_buffer(ssize, max_sector,
|
|
2 * max_buffer_sectors + buffer_min);
|
|
} else
|
|
transfer_size(ssize, max_sector,
|
|
2 * max_buffer_sectors + buffer_min -
|
|
aligned_sector_t);
|
|
|
|
/* round up current_count_sectors to get dma xfer size */
|
|
raw_cmd->length = in_sector_offset + current_count_sectors;
|
|
raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1;
|
|
raw_cmd->length <<= 9;
|
|
if ((raw_cmd->length < current_count_sectors << 9) ||
|
|
(raw_cmd->kernel_data != current_req->buffer &&
|
|
CT(COMMAND) == FD_WRITE &&
|
|
(aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
|
|
aligned_sector_t < buffer_min)) ||
|
|
raw_cmd->length % (128 << SIZECODE) ||
|
|
raw_cmd->length <= 0 || current_count_sectors <= 0) {
|
|
DPRINT("fractionary current count b=%lx s=%lx\n",
|
|
raw_cmd->length, current_count_sectors);
|
|
if (raw_cmd->kernel_data != current_req->buffer)
|
|
pr_info("addr=%d, length=%ld\n",
|
|
(int)((raw_cmd->kernel_data -
|
|
floppy_track_buffer) >> 9),
|
|
current_count_sectors);
|
|
pr_info("st=%d ast=%d mse=%d msi=%d\n",
|
|
fsector_t, aligned_sector_t, max_sector, max_size);
|
|
pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
|
|
pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
|
|
COMMAND, SECTOR, HEAD, TRACK);
|
|
pr_info("buffer drive=%d\n", buffer_drive);
|
|
pr_info("buffer track=%d\n", buffer_track);
|
|
pr_info("buffer_min=%d\n", buffer_min);
|
|
pr_info("buffer_max=%d\n", buffer_max);
|
|
return 0;
|
|
}
|
|
|
|
if (raw_cmd->kernel_data != current_req->buffer) {
|
|
if (raw_cmd->kernel_data < floppy_track_buffer ||
|
|
current_count_sectors < 0 ||
|
|
raw_cmd->length < 0 ||
|
|
raw_cmd->kernel_data + raw_cmd->length >
|
|
floppy_track_buffer + (max_buffer_sectors << 10)) {
|
|
DPRINT("buffer overrun in schedule dma\n");
|
|
pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n",
|
|
fsector_t, buffer_min, raw_cmd->length >> 9);
|
|
pr_info("current_count_sectors=%ld\n",
|
|
current_count_sectors);
|
|
if (CT(COMMAND) == FD_READ)
|
|
pr_info("read\n");
|
|
if (CT(COMMAND) == FD_WRITE)
|
|
pr_info("write\n");
|
|
return 0;
|
|
}
|
|
} else if (raw_cmd->length > blk_rq_bytes(current_req) ||
|
|
current_count_sectors > blk_rq_sectors(current_req)) {
|
|
DPRINT("buffer overrun in direct transfer\n");
|
|
return 0;
|
|
} else if (raw_cmd->length < current_count_sectors << 9) {
|
|
DPRINT("more sectors than bytes\n");
|
|
pr_info("bytes=%ld\n", raw_cmd->length >> 9);
|
|
pr_info("sectors=%ld\n", current_count_sectors);
|
|
}
|
|
if (raw_cmd->length == 0) {
|
|
DPRINT("zero dma transfer attempted from make_raw_request\n");
|
|
return 0;
|
|
}
|
|
|
|
virtualdmabug_workaround();
|
|
return 2;
|
|
}
|
|
|
|
/*
|
|
* Round-robin between our available drives, doing one request from each
|
|
*/
|
|
static int set_next_request(void)
|
|
{
|
|
struct request_queue *q;
|
|
int old_pos = fdc_queue;
|
|
|
|
do {
|
|
q = disks[fdc_queue]->queue;
|
|
if (++fdc_queue == N_DRIVE)
|
|
fdc_queue = 0;
|
|
if (q) {
|
|
current_req = blk_fetch_request(q);
|
|
if (current_req)
|
|
break;
|
|
}
|
|
} while (fdc_queue != old_pos);
|
|
|
|
return current_req != NULL;
|
|
}
|
|
|
|
static void redo_fd_request(void)
|
|
{
|
|
int drive;
|
|
int tmp;
|
|
|
|
lastredo = jiffies;
|
|
if (current_drive < N_DRIVE)
|
|
floppy_off(current_drive);
|
|
|
|
do_request:
|
|
if (!current_req) {
|
|
int pending;
|
|
|
|
spin_lock_irq(&floppy_lock);
|
|
pending = set_next_request();
|
|
spin_unlock_irq(&floppy_lock);
|
|
if (!pending) {
|
|
do_floppy = NULL;
|
|
unlock_fdc();
|
|
return;
|
|
}
|
|
}
|
|
drive = (long)current_req->rq_disk->private_data;
|
|
set_fdc(drive);
|
|
reschedule_timeout(current_reqD, "redo fd request");
|
|
|
|
set_floppy(drive);
|
|
raw_cmd = &default_raw_cmd;
|
|
raw_cmd->flags = 0;
|
|
if (start_motor(redo_fd_request))
|
|
return;
|
|
|
|
disk_change(current_drive);
|
|
if (test_bit(current_drive, &fake_change) ||
|
|
test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) {
|
|
DPRINT("disk absent or changed during operation\n");
|
|
request_done(0);
|
|
goto do_request;
|
|
}
|
|
if (!_floppy) { /* Autodetection */
|
|
if (!probing) {
|
|
DRS->probed_format = 0;
|
|
if (next_valid_format()) {
|
|
DPRINT("no autodetectable formats\n");
|
|
_floppy = NULL;
|
|
request_done(0);
|
|
goto do_request;
|
|
}
|
|
}
|
|
probing = 1;
|
|
_floppy = floppy_type + DP->autodetect[DRS->probed_format];
|
|
} else
|
|
probing = 0;
|
|
errors = &(current_req->errors);
|
|
tmp = make_raw_rw_request();
|
|
if (tmp < 2) {
|
|
request_done(tmp);
|
|
goto do_request;
|
|
}
|
|
|
|
if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags))
|
|
twaddle();
|
|
schedule_bh(floppy_start);
|
|
debugt(__func__, "queue fd request");
|
|
return;
|
|
}
|
|
|
|
static const struct cont_t rw_cont = {
|
|
.interrupt = rw_interrupt,
|
|
.redo = redo_fd_request,
|
|
.error = bad_flp_intr,
|
|
.done = request_done
|
|
};
|
|
|
|
static void process_fd_request(void)
|
|
{
|
|
cont = &rw_cont;
|
|
schedule_bh(redo_fd_request);
|
|
}
|
|
|
|
static void do_fd_request(struct request_queue *q)
|
|
{
|
|
if (WARN(max_buffer_sectors == 0,
|
|
"VFS: %s called on non-open device\n", __func__))
|
|
return;
|
|
|
|
if (WARN(atomic_read(&usage_count) == 0,
|
|
"warning: usage count=0, current_req=%p sect=%ld type=%x flags=%x\n",
|
|
current_req, (long)blk_rq_pos(current_req), current_req->cmd_type,
|
|
current_req->cmd_flags))
|
|
return;
|
|
|
|
if (test_and_set_bit(0, &fdc_busy)) {
|
|
/* fdc busy, this new request will be treated when the
|
|
current one is done */
|
|
is_alive(__func__, "old request running");
|
|
return;
|
|
}
|
|
command_status = FD_COMMAND_NONE;
|
|
__reschedule_timeout(MAXTIMEOUT, "fd_request");
|
|
set_fdc(0);
|
|
process_fd_request();
|
|
is_alive(__func__, "");
|
|
}
|
|
|
|
static const struct cont_t poll_cont = {
|
|
.interrupt = success_and_wakeup,
|
|
.redo = floppy_ready,
|
|
.error = generic_failure,
|
|
.done = generic_done
|
|
};
|
|
|
|
static int poll_drive(bool interruptible, int flag)
|
|
{
|
|
/* no auto-sense, just clear dcl */
|
|
raw_cmd = &default_raw_cmd;
|
|
raw_cmd->flags = flag;
|
|
raw_cmd->track = 0;
|
|
raw_cmd->cmd_count = 0;
|
|
cont = &poll_cont;
|
|
debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n");
|
|
set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
|
|
|
|
return wait_til_done(floppy_ready, interruptible);
|
|
}
|
|
|
|
/*
|
|
* User triggered reset
|
|
* ====================
|
|
*/
|
|
|
|
static void reset_intr(void)
|
|
{
|
|
pr_info("weird, reset interrupt called\n");
|
|
}
|
|
|
|
static const struct cont_t reset_cont = {
|
|
.interrupt = reset_intr,
|
|
.redo = success_and_wakeup,
|
|
.error = generic_failure,
|
|
.done = generic_done
|
|
};
|
|
|
|
static int user_reset_fdc(int drive, int arg, bool interruptible)
|
|
{
|
|
int ret;
|
|
|
|
if (lock_fdc(drive, interruptible))
|
|
return -EINTR;
|
|
|
|
if (arg == FD_RESET_ALWAYS)
|
|
FDCS->reset = 1;
|
|
if (FDCS->reset) {
|
|
cont = &reset_cont;
|
|
ret = wait_til_done(reset_fdc, interruptible);
|
|
if (ret == -EINTR)
|
|
return -EINTR;
|
|
}
|
|
process_fd_request();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Misc Ioctl's and support
|
|
* ========================
|
|
*/
|
|
static inline int fd_copyout(void __user *param, const void *address,
|
|
unsigned long size)
|
|
{
|
|
return copy_to_user(param, address, size) ? -EFAULT : 0;
|
|
}
|
|
|
|
static inline int fd_copyin(void __user *param, void *address,
|
|
unsigned long size)
|
|
{
|
|
return copy_from_user(address, param, size) ? -EFAULT : 0;
|
|
}
|
|
|
|
static const char *drive_name(int type, int drive)
|
|
{
|
|
struct floppy_struct *floppy;
|
|
|
|
if (type)
|
|
floppy = floppy_type + type;
|
|
else {
|
|
if (UDP->native_format)
|
|
floppy = floppy_type + UDP->native_format;
|
|
else
|
|
return "(null)";
|
|
}
|
|
if (floppy->name)
|
|
return floppy->name;
|
|
else
|
|
return "(null)";
|
|
}
|
|
|
|
/* raw commands */
|
|
static void raw_cmd_done(int flag)
|
|
{
|
|
int i;
|
|
|
|
if (!flag) {
|
|
raw_cmd->flags |= FD_RAW_FAILURE;
|
|
raw_cmd->flags |= FD_RAW_HARDFAILURE;
|
|
} else {
|
|
raw_cmd->reply_count = inr;
|
|
if (raw_cmd->reply_count > MAX_REPLIES)
|
|
raw_cmd->reply_count = 0;
|
|
for (i = 0; i < raw_cmd->reply_count; i++)
|
|
raw_cmd->reply[i] = reply_buffer[i];
|
|
|
|
if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
|
|
unsigned long flags;
|
|
flags = claim_dma_lock();
|
|
raw_cmd->length = fd_get_dma_residue();
|
|
release_dma_lock(flags);
|
|
}
|
|
|
|
if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
|
|
(!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
|
|
raw_cmd->flags |= FD_RAW_FAILURE;
|
|
|
|
if (disk_change(current_drive))
|
|
raw_cmd->flags |= FD_RAW_DISK_CHANGE;
|
|
else
|
|
raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
|
|
if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
|
|
motor_off_callback(current_drive);
|
|
|
|
if (raw_cmd->next &&
|
|
(!(raw_cmd->flags & FD_RAW_FAILURE) ||
|
|
!(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
|
|
((raw_cmd->flags & FD_RAW_FAILURE) ||
|
|
!(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) {
|
|
raw_cmd = raw_cmd->next;
|
|
return;
|
|
}
|
|
}
|
|
generic_done(flag);
|
|
}
|
|
|
|
static const struct cont_t raw_cmd_cont = {
|
|
.interrupt = success_and_wakeup,
|
|
.redo = floppy_start,
|
|
.error = generic_failure,
|
|
.done = raw_cmd_done
|
|
};
|
|
|
|
static int raw_cmd_copyout(int cmd, void __user *param,
|
|
struct floppy_raw_cmd *ptr)
|
|
{
|
|
int ret;
|
|
|
|
while (ptr) {
|
|
ret = copy_to_user(param, ptr, sizeof(*ptr));
|
|
if (ret)
|
|
return -EFAULT;
|
|
param += sizeof(struct floppy_raw_cmd);
|
|
if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) {
|
|
if (ptr->length >= 0 &&
|
|
ptr->length <= ptr->buffer_length) {
|
|
long length = ptr->buffer_length - ptr->length;
|
|
ret = fd_copyout(ptr->data, ptr->kernel_data,
|
|
length);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
ptr = ptr->next;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void raw_cmd_free(struct floppy_raw_cmd **ptr)
|
|
{
|
|
struct floppy_raw_cmd *next;
|
|
struct floppy_raw_cmd *this;
|
|
|
|
this = *ptr;
|
|
*ptr = NULL;
|
|
while (this) {
|
|
if (this->buffer_length) {
|
|
fd_dma_mem_free((unsigned long)this->kernel_data,
|
|
this->buffer_length);
|
|
this->buffer_length = 0;
|
|
}
|
|
next = this->next;
|
|
kfree(this);
|
|
this = next;
|
|
}
|
|
}
|
|
|
|
static int raw_cmd_copyin(int cmd, void __user *param,
|
|
struct floppy_raw_cmd **rcmd)
|
|
{
|
|
struct floppy_raw_cmd *ptr;
|
|
int ret;
|
|
int i;
|
|
|
|
*rcmd = NULL;
|
|
|
|
loop:
|
|
ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
|
|
if (!ptr)
|
|
return -ENOMEM;
|
|
*rcmd = ptr;
|
|
ret = copy_from_user(ptr, param, sizeof(*ptr));
|
|
if (ret)
|
|
return -EFAULT;
|
|
ptr->next = NULL;
|
|
ptr->buffer_length = 0;
|
|
param += sizeof(struct floppy_raw_cmd);
|
|
if (ptr->cmd_count > 33)
|
|
/* the command may now also take up the space
|
|
* initially intended for the reply & the
|
|
* reply count. Needed for long 82078 commands
|
|
* such as RESTORE, which takes ... 17 command
|
|
* bytes. Murphy's law #137: When you reserve
|
|
* 16 bytes for a structure, you'll one day
|
|
* discover that you really need 17...
|
|
*/
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < 16; i++)
|
|
ptr->reply[i] = 0;
|
|
ptr->resultcode = 0;
|
|
ptr->kernel_data = NULL;
|
|
|
|
if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
|
|
if (ptr->length <= 0)
|
|
return -EINVAL;
|
|
ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length);
|
|
fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length);
|
|
if (!ptr->kernel_data)
|
|
return -ENOMEM;
|
|
ptr->buffer_length = ptr->length;
|
|
}
|
|
if (ptr->flags & FD_RAW_WRITE) {
|
|
ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (ptr->flags & FD_RAW_MORE) {
|
|
rcmd = &(ptr->next);
|
|
ptr->rate &= 0x43;
|
|
goto loop;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int raw_cmd_ioctl(int cmd, void __user *param)
|
|
{
|
|
struct floppy_raw_cmd *my_raw_cmd;
|
|
int drive;
|
|
int ret2;
|
|
int ret;
|
|
|
|
if (FDCS->rawcmd <= 1)
|
|
FDCS->rawcmd = 1;
|
|
for (drive = 0; drive < N_DRIVE; drive++) {
|
|
if (FDC(drive) != fdc)
|
|
continue;
|
|
if (drive == current_drive) {
|
|
if (UDRS->fd_ref > 1) {
|
|
FDCS->rawcmd = 2;
|
|
break;
|
|
}
|
|
} else if (UDRS->fd_ref) {
|
|
FDCS->rawcmd = 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (FDCS->reset)
|
|
return -EIO;
|
|
|
|
ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
|
|
if (ret) {
|
|
raw_cmd_free(&my_raw_cmd);
|
|
return ret;
|
|
}
|
|
|
|
raw_cmd = my_raw_cmd;
|
|
cont = &raw_cmd_cont;
|
|
ret = wait_til_done(floppy_start, true);
|
|
debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n");
|
|
|
|
if (ret != -EINTR && FDCS->reset)
|
|
ret = -EIO;
|
|
|
|
DRS->track = NO_TRACK;
|
|
|
|
ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
|
|
if (!ret)
|
|
ret = ret2;
|
|
raw_cmd_free(&my_raw_cmd);
|
|
return ret;
|
|
}
|
|
|
|
static int invalidate_drive(struct block_device *bdev)
|
|
{
|
|
/* invalidate the buffer track to force a reread */
|
|
set_bit((long)bdev->bd_disk->private_data, &fake_change);
|
|
process_fd_request();
|
|
check_disk_change(bdev);
|
|
return 0;
|
|
}
|
|
|
|
static int set_geometry(unsigned int cmd, struct floppy_struct *g,
|
|
int drive, int type, struct block_device *bdev)
|
|
{
|
|
int cnt;
|
|
|
|
/* sanity checking for parameters. */
|
|
if (g->sect <= 0 ||
|
|
g->head <= 0 ||
|
|
g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) ||
|
|
/* check if reserved bits are set */
|
|
(g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0)
|
|
return -EINVAL;
|
|
if (type) {
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
mutex_lock(&open_lock);
|
|
if (lock_fdc(drive, true)) {
|
|
mutex_unlock(&open_lock);
|
|
return -EINTR;
|
|
}
|
|
floppy_type[type] = *g;
|
|
floppy_type[type].name = "user format";
|
|
for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
|
|
floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] =
|
|
floppy_type[type].size + 1;
|
|
process_fd_request();
|
|
for (cnt = 0; cnt < N_DRIVE; cnt++) {
|
|
struct block_device *bdev = opened_bdev[cnt];
|
|
if (!bdev || ITYPE(drive_state[cnt].fd_device) != type)
|
|
continue;
|
|
__invalidate_device(bdev, true);
|
|
}
|
|
mutex_unlock(&open_lock);
|
|
} else {
|
|
int oldStretch;
|
|
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
if (cmd != FDDEFPRM) {
|
|
/* notice a disk change immediately, else
|
|
* we lose our settings immediately*/
|
|
if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
|
|
return -EINTR;
|
|
}
|
|
oldStretch = g->stretch;
|
|
user_params[drive] = *g;
|
|
if (buffer_drive == drive)
|
|
SUPBOUND(buffer_max, user_params[drive].sect);
|
|
current_type[drive] = &user_params[drive];
|
|
floppy_sizes[drive] = user_params[drive].size;
|
|
if (cmd == FDDEFPRM)
|
|
DRS->keep_data = -1;
|
|
else
|
|
DRS->keep_data = 1;
|
|
/* invalidation. Invalidate only when needed, i.e.
|
|
* when there are already sectors in the buffer cache
|
|
* whose number will change. This is useful, because
|
|
* mtools often changes the geometry of the disk after
|
|
* looking at the boot block */
|
|
if (DRS->maxblock > user_params[drive].sect ||
|
|
DRS->maxtrack ||
|
|
((user_params[drive].sect ^ oldStretch) &
|
|
(FD_SWAPSIDES | FD_SECTBASEMASK)))
|
|
invalidate_drive(bdev);
|
|
else
|
|
process_fd_request();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* handle obsolete ioctl's */
|
|
static unsigned int ioctl_table[] = {
|
|
FDCLRPRM,
|
|
FDSETPRM,
|
|
FDDEFPRM,
|
|
FDGETPRM,
|
|
FDMSGON,
|
|
FDMSGOFF,
|
|
FDFMTBEG,
|
|
FDFMTTRK,
|
|
FDFMTEND,
|
|
FDSETEMSGTRESH,
|
|
FDFLUSH,
|
|
FDSETMAXERRS,
|
|
FDGETMAXERRS,
|
|
FDGETDRVTYP,
|
|
FDSETDRVPRM,
|
|
FDGETDRVPRM,
|
|
FDGETDRVSTAT,
|
|
FDPOLLDRVSTAT,
|
|
FDRESET,
|
|
FDGETFDCSTAT,
|
|
FDWERRORCLR,
|
|
FDWERRORGET,
|
|
FDRAWCMD,
|
|
FDEJECT,
|
|
FDTWADDLE
|
|
};
|
|
|
|
static int normalize_ioctl(unsigned int *cmd, int *size)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) {
|
|
if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) {
|
|
*size = _IOC_SIZE(*cmd);
|
|
*cmd = ioctl_table[i];
|
|
if (*size > _IOC_SIZE(*cmd)) {
|
|
pr_info("ioctl not yet supported\n");
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
|
|
{
|
|
if (type)
|
|
*g = &floppy_type[type];
|
|
else {
|
|
if (lock_fdc(drive, false))
|
|
return -EINTR;
|
|
if (poll_drive(false, 0) == -EINTR)
|
|
return -EINTR;
|
|
process_fd_request();
|
|
*g = current_type[drive];
|
|
}
|
|
if (!*g)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
|
{
|
|
int drive = (long)bdev->bd_disk->private_data;
|
|
int type = ITYPE(drive_state[drive].fd_device);
|
|
struct floppy_struct *g;
|
|
int ret;
|
|
|
|
ret = get_floppy_geometry(drive, type, &g);
|
|
if (ret)
|
|
return ret;
|
|
|
|
geo->heads = g->head;
|
|
geo->sectors = g->sect;
|
|
geo->cylinders = g->track;
|
|
return 0;
|
|
}
|
|
|
|
static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
|
|
unsigned long param)
|
|
{
|
|
int drive = (long)bdev->bd_disk->private_data;
|
|
int type = ITYPE(UDRS->fd_device);
|
|
int i;
|
|
int ret;
|
|
int size;
|
|
union inparam {
|
|
struct floppy_struct g; /* geometry */
|
|
struct format_descr f;
|
|
struct floppy_max_errors max_errors;
|
|
struct floppy_drive_params dp;
|
|
} inparam; /* parameters coming from user space */
|
|
const void *outparam; /* parameters passed back to user space */
|
|
|
|
/* convert compatibility eject ioctls into floppy eject ioctl.
|
|
* We do this in order to provide a means to eject floppy disks before
|
|
* installing the new fdutils package */
|
|
if (cmd == CDROMEJECT || /* CD-ROM eject */
|
|
cmd == 0x6470) { /* SunOS floppy eject */
|
|
DPRINT("obsolete eject ioctl\n");
|
|
DPRINT("please use floppycontrol --eject\n");
|
|
cmd = FDEJECT;
|
|
}
|
|
|
|
if (!((cmd & 0xff00) == 0x0200))
|
|
return -EINVAL;
|
|
|
|
/* convert the old style command into a new style command */
|
|
ret = normalize_ioctl(&cmd, &size);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* permission checks */
|
|
if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) ||
|
|
((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
|
|
return -EPERM;
|
|
|
|
if (WARN_ON(size < 0 || size > sizeof(inparam)))
|
|
return -EINVAL;
|
|
|
|
/* copyin */
|
|
memset(&inparam, 0, sizeof(inparam));
|
|
if (_IOC_DIR(cmd) & _IOC_WRITE) {
|
|
ret = fd_copyin((void __user *)param, &inparam, size);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case FDEJECT:
|
|
if (UDRS->fd_ref != 1)
|
|
/* somebody else has this drive open */
|
|
return -EBUSY;
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
|
|
/* do the actual eject. Fails on
|
|
* non-Sparc architectures */
|
|
ret = fd_eject(UNIT(drive));
|
|
|
|
set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
|
|
set_bit(FD_VERIFY_BIT, &UDRS->flags);
|
|
process_fd_request();
|
|
return ret;
|
|
case FDCLRPRM:
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
current_type[drive] = NULL;
|
|
floppy_sizes[drive] = MAX_DISK_SIZE << 1;
|
|
UDRS->keep_data = 0;
|
|
return invalidate_drive(bdev);
|
|
case FDSETPRM:
|
|
case FDDEFPRM:
|
|
return set_geometry(cmd, &inparam.g, drive, type, bdev);
|
|
case FDGETPRM:
|
|
ret = get_floppy_geometry(drive, type,
|
|
(struct floppy_struct **)&outparam);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case FDMSGON:
|
|
UDP->flags |= FTD_MSG;
|
|
return 0;
|
|
case FDMSGOFF:
|
|
UDP->flags &= ~FTD_MSG;
|
|
return 0;
|
|
case FDFMTBEG:
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
|
|
return -EINTR;
|
|
ret = UDRS->flags;
|
|
process_fd_request();
|
|
if (ret & FD_VERIFY)
|
|
return -ENODEV;
|
|
if (!(ret & FD_DISK_WRITABLE))
|
|
return -EROFS;
|
|
return 0;
|
|
case FDFMTTRK:
|
|
if (UDRS->fd_ref != 1)
|
|
return -EBUSY;
|
|
return do_format(drive, &inparam.f);
|
|
case FDFMTEND:
|
|
case FDFLUSH:
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
return invalidate_drive(bdev);
|
|
case FDSETEMSGTRESH:
|
|
UDP->max_errors.reporting = (unsigned short)(param & 0x0f);
|
|
return 0;
|
|
case FDGETMAXERRS:
|
|
outparam = &UDP->max_errors;
|
|
break;
|
|
case FDSETMAXERRS:
|
|
UDP->max_errors = inparam.max_errors;
|
|
break;
|
|
case FDGETDRVTYP:
|
|
outparam = drive_name(type, drive);
|
|
SUPBOUND(size, strlen((const char *)outparam) + 1);
|
|
break;
|
|
case FDSETDRVPRM:
|
|
*UDP = inparam.dp;
|
|
break;
|
|
case FDGETDRVPRM:
|
|
outparam = UDP;
|
|
break;
|
|
case FDPOLLDRVSTAT:
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
|
|
return -EINTR;
|
|
process_fd_request();
|
|
/* fall through */
|
|
case FDGETDRVSTAT:
|
|
outparam = UDRS;
|
|
break;
|
|
case FDRESET:
|
|
return user_reset_fdc(drive, (int)param, true);
|
|
case FDGETFDCSTAT:
|
|
outparam = UFDCS;
|
|
break;
|
|
case FDWERRORCLR:
|
|
memset(UDRWE, 0, sizeof(*UDRWE));
|
|
return 0;
|
|
case FDWERRORGET:
|
|
outparam = UDRWE;
|
|
break;
|
|
case FDRAWCMD:
|
|
if (type)
|
|
return -EINVAL;
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
set_floppy(drive);
|
|
i = raw_cmd_ioctl(cmd, (void __user *)param);
|
|
if (i == -EINTR)
|
|
return -EINTR;
|
|
process_fd_request();
|
|
return i;
|
|
case FDTWADDLE:
|
|
if (lock_fdc(drive, true))
|
|
return -EINTR;
|
|
twaddle();
|
|
process_fd_request();
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (_IOC_DIR(cmd) & _IOC_READ)
|
|
return fd_copyout((void __user *)param, outparam, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fd_ioctl(struct block_device *bdev, fmode_t mode,
|
|
unsigned int cmd, unsigned long param)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&floppy_mutex);
|
|
ret = fd_locked_ioctl(bdev, mode, cmd, param);
|
|
mutex_unlock(&floppy_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __init config_types(void)
|
|
{
|
|
bool has_drive = false;
|
|
int drive;
|
|
|
|
/* read drive info out of physical CMOS */
|
|
drive = 0;
|
|
if (!UDP->cmos)
|
|
UDP->cmos = FLOPPY0_TYPE;
|
|
drive = 1;
|
|
if (!UDP->cmos && FLOPPY1_TYPE)
|
|
UDP->cmos = FLOPPY1_TYPE;
|
|
|
|
/* FIXME: additional physical CMOS drive detection should go here */
|
|
|
|
for (drive = 0; drive < N_DRIVE; drive++) {
|
|
unsigned int type = UDP->cmos;
|
|
struct floppy_drive_params *params;
|
|
const char *name = NULL;
|
|
static char temparea[32];
|
|
|
|
if (type < ARRAY_SIZE(default_drive_params)) {
|
|
params = &default_drive_params[type].params;
|
|
if (type) {
|
|
name = default_drive_params[type].name;
|
|
allowed_drive_mask |= 1 << drive;
|
|
} else
|
|
allowed_drive_mask &= ~(1 << drive);
|
|
} else {
|
|
params = &default_drive_params[0].params;
|
|
sprintf(temparea, "unknown type %d (usb?)", type);
|
|
name = temparea;
|
|
}
|
|
if (name) {
|
|
const char *prepend;
|
|
if (!has_drive) {
|
|
prepend = "";
|
|
has_drive = true;
|
|
pr_info("Floppy drive(s):");
|
|
} else {
|
|
prepend = ",";
|
|
}
|
|
|
|
pr_cont("%s fd%d is %s", prepend, drive, name);
|
|
}
|
|
*UDP = *params;
|
|
}
|
|
|
|
if (has_drive)
|
|
pr_cont("\n");
|
|
}
|
|
|
|
static int floppy_release(struct gendisk *disk, fmode_t mode)
|
|
{
|
|
int drive = (long)disk->private_data;
|
|
|
|
mutex_lock(&floppy_mutex);
|
|
mutex_lock(&open_lock);
|
|
if (!UDRS->fd_ref--) {
|
|
DPRINT("floppy_release with fd_ref == 0");
|
|
UDRS->fd_ref = 0;
|
|
}
|
|
if (!UDRS->fd_ref)
|
|
opened_bdev[drive] = NULL;
|
|
mutex_unlock(&open_lock);
|
|
mutex_unlock(&floppy_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* floppy_open check for aliasing (/dev/fd0 can be the same as
|
|
* /dev/PS0 etc), and disallows simultaneous access to the same
|
|
* drive with different device numbers.
|
|
*/
|
|
static int floppy_open(struct block_device *bdev, fmode_t mode)
|
|
{
|
|
int drive = (long)bdev->bd_disk->private_data;
|
|
int old_dev, new_dev;
|
|
int try;
|
|
int res = -EBUSY;
|
|
char *tmp;
|
|
|
|
mutex_lock(&floppy_mutex);
|
|
mutex_lock(&open_lock);
|
|
old_dev = UDRS->fd_device;
|
|
if (opened_bdev[drive] && opened_bdev[drive] != bdev)
|
|
goto out2;
|
|
|
|
if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) {
|
|
set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
|
|
set_bit(FD_VERIFY_BIT, &UDRS->flags);
|
|
}
|
|
|
|
UDRS->fd_ref++;
|
|
|
|
opened_bdev[drive] = bdev;
|
|
|
|
res = -ENXIO;
|
|
|
|
if (!floppy_track_buffer) {
|
|
/* if opening an ED drive, reserve a big buffer,
|
|
* else reserve a small one */
|
|
if ((UDP->cmos == 6) || (UDP->cmos == 5))
|
|
try = 64; /* Only 48 actually useful */
|
|
else
|
|
try = 32; /* Only 24 actually useful */
|
|
|
|
tmp = (char *)fd_dma_mem_alloc(1024 * try);
|
|
if (!tmp && !floppy_track_buffer) {
|
|
try >>= 1; /* buffer only one side */
|
|
INFBOUND(try, 16);
|
|
tmp = (char *)fd_dma_mem_alloc(1024 * try);
|
|
}
|
|
if (!tmp && !floppy_track_buffer)
|
|
fallback_on_nodma_alloc(&tmp, 2048 * try);
|
|
if (!tmp && !floppy_track_buffer) {
|
|
DPRINT("Unable to allocate DMA memory\n");
|
|
goto out;
|
|
}
|
|
if (floppy_track_buffer) {
|
|
if (tmp)
|
|
fd_dma_mem_free((unsigned long)tmp, try * 1024);
|
|
} else {
|
|
buffer_min = buffer_max = -1;
|
|
floppy_track_buffer = tmp;
|
|
max_buffer_sectors = try;
|
|
}
|
|
}
|
|
|
|
new_dev = MINOR(bdev->bd_dev);
|
|
UDRS->fd_device = new_dev;
|
|
set_capacity(disks[drive], floppy_sizes[new_dev]);
|
|
if (old_dev != -1 && old_dev != new_dev) {
|
|
if (buffer_drive == drive)
|
|
buffer_track = -1;
|
|
}
|
|
|
|
if (UFDCS->rawcmd == 1)
|
|
UFDCS->rawcmd = 2;
|
|
|
|
if (!(mode & FMODE_NDELAY)) {
|
|
if (mode & (FMODE_READ|FMODE_WRITE)) {
|
|
UDRS->last_checked = 0;
|
|
check_disk_change(bdev);
|
|
if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
|
|
goto out;
|
|
}
|
|
res = -EROFS;
|
|
if ((mode & FMODE_WRITE) &&
|
|
!test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags))
|
|
goto out;
|
|
}
|
|
mutex_unlock(&open_lock);
|
|
mutex_unlock(&floppy_mutex);
|
|
return 0;
|
|
out:
|
|
UDRS->fd_ref--;
|
|
|
|
if (!UDRS->fd_ref)
|
|
opened_bdev[drive] = NULL;
|
|
out2:
|
|
mutex_unlock(&open_lock);
|
|
mutex_unlock(&floppy_mutex);
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Check if the disk has been changed or if a change has been faked.
|
|
*/
|
|
static unsigned int floppy_check_events(struct gendisk *disk,
|
|
unsigned int clearing)
|
|
{
|
|
int drive = (long)disk->private_data;
|
|
|
|
if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
|
|
test_bit(FD_VERIFY_BIT, &UDRS->flags))
|
|
return DISK_EVENT_MEDIA_CHANGE;
|
|
|
|
if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
|
|
lock_fdc(drive, false);
|
|
poll_drive(false, 0);
|
|
process_fd_request();
|
|
}
|
|
|
|
if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
|
|
test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
|
|
test_bit(drive, &fake_change) ||
|
|
drive_no_geom(drive))
|
|
return DISK_EVENT_MEDIA_CHANGE;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This implements "read block 0" for floppy_revalidate().
|
|
* Needed for format autodetection, checking whether there is
|
|
* a disk in the drive, and whether that disk is writable.
|
|
*/
|
|
|
|
static void floppy_rb0_complete(struct bio *bio, int err)
|
|
{
|
|
complete((struct completion *)bio->bi_private);
|
|
}
|
|
|
|
static int __floppy_read_block_0(struct block_device *bdev)
|
|
{
|
|
struct bio bio;
|
|
struct bio_vec bio_vec;
|
|
struct completion complete;
|
|
struct page *page;
|
|
size_t size;
|
|
|
|
page = alloc_page(GFP_NOIO);
|
|
if (!page) {
|
|
process_fd_request();
|
|
return -ENOMEM;
|
|
}
|
|
|
|
size = bdev->bd_block_size;
|
|
if (!size)
|
|
size = 1024;
|
|
|
|
bio_init(&bio);
|
|
bio.bi_io_vec = &bio_vec;
|
|
bio_vec.bv_page = page;
|
|
bio_vec.bv_len = size;
|
|
bio_vec.bv_offset = 0;
|
|
bio.bi_vcnt = 1;
|
|
bio.bi_idx = 0;
|
|
bio.bi_size = size;
|
|
bio.bi_bdev = bdev;
|
|
bio.bi_sector = 0;
|
|
bio.bi_flags = (1 << BIO_QUIET);
|
|
init_completion(&complete);
|
|
bio.bi_private = &complete;
|
|
bio.bi_end_io = floppy_rb0_complete;
|
|
|
|
submit_bio(READ, &bio);
|
|
process_fd_request();
|
|
wait_for_completion(&complete);
|
|
|
|
__free_page(page);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* revalidate the floppy disk, i.e. trigger format autodetection by reading
|
|
* the bootblock (block 0). "Autodetection" is also needed to check whether
|
|
* there is a disk in the drive at all... Thus we also do it for fixed
|
|
* geometry formats */
|
|
static int floppy_revalidate(struct gendisk *disk)
|
|
{
|
|
int drive = (long)disk->private_data;
|
|
int cf;
|
|
int res = 0;
|
|
|
|
if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
|
|
test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
|
|
test_bit(drive, &fake_change) ||
|
|
drive_no_geom(drive)) {
|
|
if (WARN(atomic_read(&usage_count) == 0,
|
|
"VFS: revalidate called on non-open device.\n"))
|
|
return -EFAULT;
|
|
|
|
lock_fdc(drive, false);
|
|
cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
|
|
test_bit(FD_VERIFY_BIT, &UDRS->flags));
|
|
if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) {
|
|
process_fd_request(); /*already done by another thread */
|
|
return 0;
|
|
}
|
|
UDRS->maxblock = 0;
|
|
UDRS->maxtrack = 0;
|
|
if (buffer_drive == drive)
|
|
buffer_track = -1;
|
|
clear_bit(drive, &fake_change);
|
|
clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
|
|
if (cf)
|
|
UDRS->generation++;
|
|
if (drive_no_geom(drive)) {
|
|
/* auto-sensing */
|
|
res = __floppy_read_block_0(opened_bdev[drive]);
|
|
} else {
|
|
if (cf)
|
|
poll_drive(false, FD_RAW_NEED_DISK);
|
|
process_fd_request();
|
|
}
|
|
}
|
|
set_capacity(disk, floppy_sizes[UDRS->fd_device]);
|
|
return res;
|
|
}
|
|
|
|
static const struct block_device_operations floppy_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = floppy_open,
|
|
.release = floppy_release,
|
|
.ioctl = fd_ioctl,
|
|
.getgeo = fd_getgeo,
|
|
.check_events = floppy_check_events,
|
|
.revalidate_disk = floppy_revalidate,
|
|
};
|
|
|
|
/*
|
|
* Floppy Driver initialization
|
|
* =============================
|
|
*/
|
|
|
|
/* Determine the floppy disk controller type */
|
|
/* This routine was written by David C. Niemi */
|
|
static char __init get_fdc_version(void)
|
|
{
|
|
int r;
|
|
|
|
output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
|
|
if (FDCS->reset)
|
|
return FDC_NONE;
|
|
r = result();
|
|
if (r <= 0x00)
|
|
return FDC_NONE; /* No FDC present ??? */
|
|
if ((r == 1) && (reply_buffer[0] == 0x80)) {
|
|
pr_info("FDC %d is an 8272A\n", fdc);
|
|
return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
|
|
}
|
|
if (r != 10) {
|
|
pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
|
|
fdc, r);
|
|
return FDC_UNKNOWN;
|
|
}
|
|
|
|
if (!fdc_configure()) {
|
|
pr_info("FDC %d is an 82072\n", fdc);
|
|
return FDC_82072; /* 82072 doesn't know CONFIGURE */
|
|
}
|
|
|
|
output_byte(FD_PERPENDICULAR);
|
|
if (need_more_output() == MORE_OUTPUT) {
|
|
output_byte(0);
|
|
} else {
|
|
pr_info("FDC %d is an 82072A\n", fdc);
|
|
return FDC_82072A; /* 82072A as found on Sparcs. */
|
|
}
|
|
|
|
output_byte(FD_UNLOCK);
|
|
r = result();
|
|
if ((r == 1) && (reply_buffer[0] == 0x80)) {
|
|
pr_info("FDC %d is a pre-1991 82077\n", fdc);
|
|
return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
|
|
* LOCK/UNLOCK */
|
|
}
|
|
if ((r != 1) || (reply_buffer[0] != 0x00)) {
|
|
pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
|
|
fdc, r);
|
|
return FDC_UNKNOWN;
|
|
}
|
|
output_byte(FD_PARTID);
|
|
r = result();
|
|
if (r != 1) {
|
|
pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
|
|
fdc, r);
|
|
return FDC_UNKNOWN;
|
|
}
|
|
if (reply_buffer[0] == 0x80) {
|
|
pr_info("FDC %d is a post-1991 82077\n", fdc);
|
|
return FDC_82077; /* Revised 82077AA passes all the tests */
|
|
}
|
|
switch (reply_buffer[0] >> 5) {
|
|
case 0x0:
|
|
/* Either a 82078-1 or a 82078SL running at 5Volt */
|
|
pr_info("FDC %d is an 82078.\n", fdc);
|
|
return FDC_82078;
|
|
case 0x1:
|
|
pr_info("FDC %d is a 44pin 82078\n", fdc);
|
|
return FDC_82078;
|
|
case 0x2:
|
|
pr_info("FDC %d is a S82078B\n", fdc);
|
|
return FDC_S82078B;
|
|
case 0x3:
|
|
pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
|
|
return FDC_87306;
|
|
default:
|
|
pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
|
|
fdc, reply_buffer[0] >> 5);
|
|
return FDC_82078_UNKN;
|
|
}
|
|
} /* get_fdc_version */
|
|
|
|
/* lilo configuration */
|
|
|
|
static void __init floppy_set_flags(int *ints, int param, int param2)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
|
|
if (param)
|
|
default_drive_params[i].params.flags |= param2;
|
|
else
|
|
default_drive_params[i].params.flags &= ~param2;
|
|
}
|
|
DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
|
|
}
|
|
|
|
static void __init daring(int *ints, int param, int param2)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) {
|
|
if (param) {
|
|
default_drive_params[i].params.select_delay = 0;
|
|
default_drive_params[i].params.flags |=
|
|
FD_SILENT_DCL_CLEAR;
|
|
} else {
|
|
default_drive_params[i].params.select_delay =
|
|
2 * HZ / 100;
|
|
default_drive_params[i].params.flags &=
|
|
~FD_SILENT_DCL_CLEAR;
|
|
}
|
|
}
|
|
DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
|
|
}
|
|
|
|
static void __init set_cmos(int *ints, int dummy, int dummy2)
|
|
{
|
|
int current_drive = 0;
|
|
|
|
if (ints[0] != 2) {
|
|
DPRINT("wrong number of parameters for CMOS\n");
|
|
return;
|
|
}
|
|
current_drive = ints[1];
|
|
if (current_drive < 0 || current_drive >= 8) {
|
|
DPRINT("bad drive for set_cmos\n");
|
|
return;
|
|
}
|
|
#if N_FDC > 1
|
|
if (current_drive >= 4 && !FDC2)
|
|
FDC2 = 0x370;
|
|
#endif
|
|
DP->cmos = ints[2];
|
|
DPRINT("setting CMOS code to %d\n", ints[2]);
|
|
}
|
|
|
|
static struct param_table {
|
|
const char *name;
|
|
void (*fn) (int *ints, int param, int param2);
|
|
int *var;
|
|
int def_param;
|
|
int param2;
|
|
} config_params[] __initdata = {
|
|
{"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
|
|
{"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */
|
|
{"asus_pci", NULL, &allowed_drive_mask, 0x33, 0},
|
|
{"irq", NULL, &FLOPPY_IRQ, 6, 0},
|
|
{"dma", NULL, &FLOPPY_DMA, 2, 0},
|
|
{"daring", daring, NULL, 1, 0},
|
|
#if N_FDC > 1
|
|
{"two_fdc", NULL, &FDC2, 0x370, 0},
|
|
{"one_fdc", NULL, &FDC2, 0, 0},
|
|
#endif
|
|
{"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL},
|
|
{"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL},
|
|
{"messages", floppy_set_flags, NULL, 1, FTD_MSG},
|
|
{"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR},
|
|
{"debug", floppy_set_flags, NULL, 1, FD_DEBUG},
|
|
{"nodma", NULL, &can_use_virtual_dma, 1, 0},
|
|
{"omnibook", NULL, &can_use_virtual_dma, 1, 0},
|
|
{"yesdma", NULL, &can_use_virtual_dma, 0, 0},
|
|
{"fifo_depth", NULL, &fifo_depth, 0xa, 0},
|
|
{"nofifo", NULL, &no_fifo, 0x20, 0},
|
|
{"usefifo", NULL, &no_fifo, 0, 0},
|
|
{"cmos", set_cmos, NULL, 0, 0},
|
|
{"slow", NULL, &slow_floppy, 1, 0},
|
|
{"unexpected_interrupts", NULL, &print_unex, 1, 0},
|
|
{"no_unexpected_interrupts", NULL, &print_unex, 0, 0},
|
|
{"L40SX", NULL, &print_unex, 0, 0}
|
|
|
|
EXTRA_FLOPPY_PARAMS
|
|
};
|
|
|
|
static int __init floppy_setup(char *str)
|
|
{
|
|
int i;
|
|
int param;
|
|
int ints[11];
|
|
|
|
str = get_options(str, ARRAY_SIZE(ints), ints);
|
|
if (str) {
|
|
for (i = 0; i < ARRAY_SIZE(config_params); i++) {
|
|
if (strcmp(str, config_params[i].name) == 0) {
|
|
if (ints[0])
|
|
param = ints[1];
|
|
else
|
|
param = config_params[i].def_param;
|
|
if (config_params[i].fn)
|
|
config_params[i].fn(ints, param,
|
|
config_params[i].
|
|
param2);
|
|
if (config_params[i].var) {
|
|
DPRINT("%s=%d\n", str, param);
|
|
*config_params[i].var = param;
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
if (str) {
|
|
DPRINT("unknown floppy option [%s]\n", str);
|
|
|
|
DPRINT("allowed options are:");
|
|
for (i = 0; i < ARRAY_SIZE(config_params); i++)
|
|
pr_cont(" %s", config_params[i].name);
|
|
pr_cont("\n");
|
|
} else
|
|
DPRINT("botched floppy option\n");
|
|
DPRINT("Read Documentation/blockdev/floppy.txt\n");
|
|
return 0;
|
|
}
|
|
|
|
static int have_no_fdc = -ENODEV;
|
|
|
|
static ssize_t floppy_cmos_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct platform_device *p = to_platform_device(dev);
|
|
int drive;
|
|
|
|
drive = p->id;
|
|
return sprintf(buf, "%X\n", UDP->cmos);
|
|
}
|
|
|
|
static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL);
|
|
|
|
static void floppy_device_release(struct device *dev)
|
|
{
|
|
}
|
|
|
|
static int floppy_resume(struct device *dev)
|
|
{
|
|
int fdc;
|
|
|
|
for (fdc = 0; fdc < N_FDC; fdc++)
|
|
if (FDCS->address != -1)
|
|
user_reset_fdc(-1, FD_RESET_ALWAYS, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops floppy_pm_ops = {
|
|
.resume = floppy_resume,
|
|
.restore = floppy_resume,
|
|
};
|
|
|
|
static struct platform_driver floppy_driver = {
|
|
.driver = {
|
|
.name = "floppy",
|
|
.pm = &floppy_pm_ops,
|
|
},
|
|
};
|
|
|
|
static struct platform_device floppy_device[N_DRIVE];
|
|
|
|
static struct kobject *floppy_find(dev_t dev, int *part, void *data)
|
|
{
|
|
int drive = (*part & 3) | ((*part & 0x80) >> 5);
|
|
if (drive >= N_DRIVE ||
|
|
!(allowed_drive_mask & (1 << drive)) ||
|
|
fdc_state[FDC(drive)].version == FDC_NONE)
|
|
return NULL;
|
|
if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type))
|
|
return NULL;
|
|
*part = 0;
|
|
return get_disk(disks[drive]);
|
|
}
|
|
|
|
static int __init floppy_init(void)
|
|
{
|
|
int i, unit, drive;
|
|
int err, dr;
|
|
|
|
set_debugt();
|
|
interruptjiffies = resultjiffies = jiffies;
|
|
|
|
#if defined(CONFIG_PPC)
|
|
if (check_legacy_ioport(FDC1))
|
|
return -ENODEV;
|
|
#endif
|
|
|
|
raw_cmd = NULL;
|
|
|
|
for (dr = 0; dr < N_DRIVE; dr++) {
|
|
disks[dr] = alloc_disk(1);
|
|
if (!disks[dr]) {
|
|
err = -ENOMEM;
|
|
goto out_put_disk;
|
|
}
|
|
|
|
floppy_wq = alloc_ordered_workqueue("floppy", 0);
|
|
if (!floppy_wq) {
|
|
err = -ENOMEM;
|
|
goto out_put_disk;
|
|
}
|
|
|
|
disks[dr]->queue = blk_init_queue(do_fd_request, &floppy_lock);
|
|
if (!disks[dr]->queue) {
|
|
err = -ENOMEM;
|
|
goto out_destroy_workq;
|
|
}
|
|
|
|
blk_queue_max_hw_sectors(disks[dr]->queue, 64);
|
|
disks[dr]->major = FLOPPY_MAJOR;
|
|
disks[dr]->first_minor = TOMINOR(dr);
|
|
disks[dr]->fops = &floppy_fops;
|
|
sprintf(disks[dr]->disk_name, "fd%d", dr);
|
|
|
|
init_timer(&motor_off_timer[dr]);
|
|
motor_off_timer[dr].data = dr;
|
|
motor_off_timer[dr].function = motor_off_callback;
|
|
}
|
|
|
|
err = register_blkdev(FLOPPY_MAJOR, "fd");
|
|
if (err)
|
|
goto out_put_disk;
|
|
|
|
err = platform_driver_register(&floppy_driver);
|
|
if (err)
|
|
goto out_unreg_blkdev;
|
|
|
|
blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
|
|
floppy_find, NULL, NULL);
|
|
|
|
for (i = 0; i < 256; i++)
|
|
if (ITYPE(i))
|
|
floppy_sizes[i] = floppy_type[ITYPE(i)].size;
|
|
else
|
|
floppy_sizes[i] = MAX_DISK_SIZE << 1;
|
|
|
|
reschedule_timeout(MAXTIMEOUT, "floppy init");
|
|
config_types();
|
|
|
|
for (i = 0; i < N_FDC; i++) {
|
|
fdc = i;
|
|
memset(FDCS, 0, sizeof(*FDCS));
|
|
FDCS->dtr = -1;
|
|
FDCS->dor = 0x4;
|
|
#if defined(__sparc__) || defined(__mc68000__)
|
|
/*sparcs/sun3x don't have a DOR reset which we can fall back on to */
|
|
#ifdef __mc68000__
|
|
if (MACH_IS_SUN3X)
|
|
#endif
|
|
FDCS->version = FDC_82072A;
|
|
#endif
|
|
}
|
|
|
|
use_virtual_dma = can_use_virtual_dma & 1;
|
|
fdc_state[0].address = FDC1;
|
|
if (fdc_state[0].address == -1) {
|
|
cancel_delayed_work(&fd_timeout);
|
|
err = -ENODEV;
|
|
goto out_unreg_region;
|
|
}
|
|
#if N_FDC > 1
|
|
fdc_state[1].address = FDC2;
|
|
#endif
|
|
|
|
fdc = 0; /* reset fdc in case of unexpected interrupt */
|
|
err = floppy_grab_irq_and_dma();
|
|
if (err) {
|
|
cancel_delayed_work(&fd_timeout);
|
|
err = -EBUSY;
|
|
goto out_unreg_region;
|
|
}
|
|
|
|
/* initialise drive state */
|
|
for (drive = 0; drive < N_DRIVE; drive++) {
|
|
memset(UDRS, 0, sizeof(*UDRS));
|
|
memset(UDRWE, 0, sizeof(*UDRWE));
|
|
set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags);
|
|
set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags);
|
|
set_bit(FD_VERIFY_BIT, &UDRS->flags);
|
|
UDRS->fd_device = -1;
|
|
floppy_track_buffer = NULL;
|
|
max_buffer_sectors = 0;
|
|
}
|
|
/*
|
|
* Small 10 msec delay to let through any interrupt that
|
|
* initialization might have triggered, to not
|
|
* confuse detection:
|
|
*/
|
|
msleep(10);
|
|
|
|
for (i = 0; i < N_FDC; i++) {
|
|
fdc = i;
|
|
FDCS->driver_version = FD_DRIVER_VERSION;
|
|
for (unit = 0; unit < 4; unit++)
|
|
FDCS->track[unit] = 0;
|
|
if (FDCS->address == -1)
|
|
continue;
|
|
FDCS->rawcmd = 2;
|
|
if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) {
|
|
/* free ioports reserved by floppy_grab_irq_and_dma() */
|
|
floppy_release_regions(fdc);
|
|
FDCS->address = -1;
|
|
FDCS->version = FDC_NONE;
|
|
continue;
|
|
}
|
|
/* Try to determine the floppy controller type */
|
|
FDCS->version = get_fdc_version();
|
|
if (FDCS->version == FDC_NONE) {
|
|
/* free ioports reserved by floppy_grab_irq_and_dma() */
|
|
floppy_release_regions(fdc);
|
|
FDCS->address = -1;
|
|
continue;
|
|
}
|
|
if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
|
|
can_use_virtual_dma = 0;
|
|
|
|
have_no_fdc = 0;
|
|
/* Not all FDCs seem to be able to handle the version command
|
|
* properly, so force a reset for the standard FDC clones,
|
|
* to avoid interrupt garbage.
|
|
*/
|
|
user_reset_fdc(-1, FD_RESET_ALWAYS, false);
|
|
}
|
|
fdc = 0;
|
|
cancel_delayed_work(&fd_timeout);
|
|
current_drive = 0;
|
|
initialized = true;
|
|
if (have_no_fdc) {
|
|
DPRINT("no floppy controllers found\n");
|
|
err = have_no_fdc;
|
|
goto out_release_dma;
|
|
}
|
|
|
|
for (drive = 0; drive < N_DRIVE; drive++) {
|
|
if (!(allowed_drive_mask & (1 << drive)))
|
|
continue;
|
|
if (fdc_state[FDC(drive)].version == FDC_NONE)
|
|
continue;
|
|
|
|
floppy_device[drive].name = floppy_device_name;
|
|
floppy_device[drive].id = drive;
|
|
floppy_device[drive].dev.release = floppy_device_release;
|
|
|
|
err = platform_device_register(&floppy_device[drive]);
|
|
if (err)
|
|
goto out_release_dma;
|
|
|
|
err = device_create_file(&floppy_device[drive].dev,
|
|
&dev_attr_cmos);
|
|
if (err)
|
|
goto out_unreg_platform_dev;
|
|
|
|
/* to be cleaned up... */
|
|
disks[drive]->private_data = (void *)(long)drive;
|
|
disks[drive]->flags |= GENHD_FL_REMOVABLE;
|
|
disks[drive]->driverfs_dev = &floppy_device[drive].dev;
|
|
add_disk(disks[drive]);
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_unreg_platform_dev:
|
|
platform_device_unregister(&floppy_device[drive]);
|
|
out_release_dma:
|
|
if (atomic_read(&usage_count))
|
|
floppy_release_irq_and_dma();
|
|
out_unreg_region:
|
|
blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
|
|
platform_driver_unregister(&floppy_driver);
|
|
out_destroy_workq:
|
|
destroy_workqueue(floppy_wq);
|
|
out_unreg_blkdev:
|
|
unregister_blkdev(FLOPPY_MAJOR, "fd");
|
|
out_put_disk:
|
|
while (dr--) {
|
|
del_timer_sync(&motor_off_timer[dr]);
|
|
if (disks[dr]->queue) {
|
|
blk_cleanup_queue(disks[dr]->queue);
|
|
/*
|
|
* put_disk() is not paired with add_disk() and
|
|
* will put queue reference one extra time. fix it.
|
|
*/
|
|
disks[dr]->queue = NULL;
|
|
}
|
|
put_disk(disks[dr]);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static const struct io_region {
|
|
int offset;
|
|
int size;
|
|
} io_regions[] = {
|
|
{ 2, 1 },
|
|
/* address + 3 is sometimes reserved by pnp bios for motherboard */
|
|
{ 4, 2 },
|
|
/* address + 6 is reserved, and may be taken by IDE.
|
|
* Unfortunately, Adaptec doesn't know this :-(, */
|
|
{ 7, 1 },
|
|
};
|
|
|
|
static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
|
|
{
|
|
while (p != io_regions) {
|
|
p--;
|
|
release_region(FDCS->address + p->offset, p->size);
|
|
}
|
|
}
|
|
|
|
#define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)]))
|
|
|
|
static int floppy_request_regions(int fdc)
|
|
{
|
|
const struct io_region *p;
|
|
|
|
for (p = io_regions; p < ARRAY_END(io_regions); p++) {
|
|
if (!request_region(FDCS->address + p->offset,
|
|
p->size, "floppy")) {
|
|
DPRINT("Floppy io-port 0x%04lx in use\n",
|
|
FDCS->address + p->offset);
|
|
floppy_release_allocated_regions(fdc, p);
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void floppy_release_regions(int fdc)
|
|
{
|
|
floppy_release_allocated_regions(fdc, ARRAY_END(io_regions));
|
|
}
|
|
|
|
static int floppy_grab_irq_and_dma(void)
|
|
{
|
|
if (atomic_inc_return(&usage_count) > 1)
|
|
return 0;
|
|
|
|
/*
|
|
* We might have scheduled a free_irq(), wait it to
|
|
* drain first:
|
|
*/
|
|
flush_workqueue(floppy_wq);
|
|
|
|
if (fd_request_irq()) {
|
|
DPRINT("Unable to grab IRQ%d for the floppy driver\n",
|
|
FLOPPY_IRQ);
|
|
atomic_dec(&usage_count);
|
|
return -1;
|
|
}
|
|
if (fd_request_dma()) {
|
|
DPRINT("Unable to grab DMA%d for the floppy driver\n",
|
|
FLOPPY_DMA);
|
|
if (can_use_virtual_dma & 2)
|
|
use_virtual_dma = can_use_virtual_dma = 1;
|
|
if (!(can_use_virtual_dma & 1)) {
|
|
fd_free_irq();
|
|
atomic_dec(&usage_count);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
for (fdc = 0; fdc < N_FDC; fdc++) {
|
|
if (FDCS->address != -1) {
|
|
if (floppy_request_regions(fdc))
|
|
goto cleanup;
|
|
}
|
|
}
|
|
for (fdc = 0; fdc < N_FDC; fdc++) {
|
|
if (FDCS->address != -1) {
|
|
reset_fdc_info(1);
|
|
fd_outb(FDCS->dor, FD_DOR);
|
|
}
|
|
}
|
|
fdc = 0;
|
|
set_dor(0, ~0, 8); /* avoid immediate interrupt */
|
|
|
|
for (fdc = 0; fdc < N_FDC; fdc++)
|
|
if (FDCS->address != -1)
|
|
fd_outb(FDCS->dor, FD_DOR);
|
|
/*
|
|
* The driver will try and free resources and relies on us
|
|
* to know if they were allocated or not.
|
|
*/
|
|
fdc = 0;
|
|
irqdma_allocated = 1;
|
|
return 0;
|
|
cleanup:
|
|
fd_free_irq();
|
|
fd_free_dma();
|
|
while (--fdc >= 0)
|
|
floppy_release_regions(fdc);
|
|
atomic_dec(&usage_count);
|
|
return -1;
|
|
}
|
|
|
|
static void floppy_release_irq_and_dma(void)
|
|
{
|
|
int old_fdc;
|
|
#ifndef __sparc__
|
|
int drive;
|
|
#endif
|
|
long tmpsize;
|
|
unsigned long tmpaddr;
|
|
|
|
if (!atomic_dec_and_test(&usage_count))
|
|
return;
|
|
|
|
if (irqdma_allocated) {
|
|
fd_disable_dma();
|
|
fd_free_dma();
|
|
fd_free_irq();
|
|
irqdma_allocated = 0;
|
|
}
|
|
set_dor(0, ~0, 8);
|
|
#if N_FDC > 1
|
|
set_dor(1, ~8, 0);
|
|
#endif
|
|
|
|
if (floppy_track_buffer && max_buffer_sectors) {
|
|
tmpsize = max_buffer_sectors * 1024;
|
|
tmpaddr = (unsigned long)floppy_track_buffer;
|
|
floppy_track_buffer = NULL;
|
|
max_buffer_sectors = 0;
|
|
buffer_min = buffer_max = -1;
|
|
fd_dma_mem_free(tmpaddr, tmpsize);
|
|
}
|
|
#ifndef __sparc__
|
|
for (drive = 0; drive < N_FDC * 4; drive++)
|
|
if (timer_pending(motor_off_timer + drive))
|
|
pr_info("motor off timer %d still active\n", drive);
|
|
#endif
|
|
|
|
if (delayed_work_pending(&fd_timeout))
|
|
pr_info("floppy timer still active:%s\n", timeout_message);
|
|
if (delayed_work_pending(&fd_timer))
|
|
pr_info("auxiliary floppy timer still active\n");
|
|
if (work_pending(&floppy_work))
|
|
pr_info("work still pending\n");
|
|
old_fdc = fdc;
|
|
for (fdc = 0; fdc < N_FDC; fdc++)
|
|
if (FDCS->address != -1)
|
|
floppy_release_regions(fdc);
|
|
fdc = old_fdc;
|
|
}
|
|
|
|
#ifdef MODULE
|
|
|
|
static char *floppy;
|
|
|
|
static void __init parse_floppy_cfg_string(char *cfg)
|
|
{
|
|
char *ptr;
|
|
|
|
while (*cfg) {
|
|
ptr = cfg;
|
|
while (*cfg && *cfg != ' ' && *cfg != '\t')
|
|
cfg++;
|
|
if (*cfg) {
|
|
*cfg = '\0';
|
|
cfg++;
|
|
}
|
|
if (*ptr)
|
|
floppy_setup(ptr);
|
|
}
|
|
}
|
|
|
|
static int __init floppy_module_init(void)
|
|
{
|
|
if (floppy)
|
|
parse_floppy_cfg_string(floppy);
|
|
return floppy_init();
|
|
}
|
|
module_init(floppy_module_init);
|
|
|
|
static void __exit floppy_module_exit(void)
|
|
{
|
|
int drive;
|
|
|
|
blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
|
|
unregister_blkdev(FLOPPY_MAJOR, "fd");
|
|
platform_driver_unregister(&floppy_driver);
|
|
|
|
for (drive = 0; drive < N_DRIVE; drive++) {
|
|
del_timer_sync(&motor_off_timer[drive]);
|
|
|
|
if ((allowed_drive_mask & (1 << drive)) &&
|
|
fdc_state[FDC(drive)].version != FDC_NONE) {
|
|
del_gendisk(disks[drive]);
|
|
device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
|
|
platform_device_unregister(&floppy_device[drive]);
|
|
}
|
|
blk_cleanup_queue(disks[drive]->queue);
|
|
|
|
/*
|
|
* These disks have not called add_disk(). Don't put down
|
|
* queue reference in put_disk().
|
|
*/
|
|
if (!(allowed_drive_mask & (1 << drive)) ||
|
|
fdc_state[FDC(drive)].version == FDC_NONE)
|
|
disks[drive]->queue = NULL;
|
|
|
|
put_disk(disks[drive]);
|
|
}
|
|
|
|
cancel_delayed_work_sync(&fd_timeout);
|
|
cancel_delayed_work_sync(&fd_timer);
|
|
destroy_workqueue(floppy_wq);
|
|
|
|
if (atomic_read(&usage_count))
|
|
floppy_release_irq_and_dma();
|
|
|
|
/* eject disk, if any */
|
|
fd_eject(0);
|
|
}
|
|
|
|
module_exit(floppy_module_exit);
|
|
|
|
module_param(floppy, charp, 0);
|
|
module_param(FLOPPY_IRQ, int, 0);
|
|
module_param(FLOPPY_DMA, int, 0);
|
|
MODULE_AUTHOR("Alain L. Knaff");
|
|
MODULE_SUPPORTED_DEVICE("fd");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* This doesn't actually get used other than for module information */
|
|
static const struct pnp_device_id floppy_pnpids[] = {
|
|
{"PNP0700", 0},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pnp, floppy_pnpids);
|
|
|
|
#else
|
|
|
|
__setup("floppy=", floppy_setup);
|
|
module_init(floppy_init)
|
|
#endif
|
|
|
|
MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);
|