2005-04-16 22:20:36 +00:00
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/*
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* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
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2008-11-02 20:40:08 +00:00
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* Copyright (C) 2003 Red Hat
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2005-04-16 22:20:36 +00:00
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*
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/blkpg.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/ide.h>
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#include <linux/bitops.h>
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2006-07-30 10:03:29 +00:00
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#include <linux/nmi.h>
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2005-04-16 22:20:36 +00:00
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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2009-03-24 22:22:47 +00:00
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void SELECT_DRIVE(ide_drive_t *drive)
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2005-04-16 22:20:36 +00:00
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{
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2008-04-17 22:46:26 +00:00
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ide_hwif_t *hwif = drive->hwif;
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2008-04-26 20:25:14 +00:00
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const struct ide_port_ops *port_ops = hwif->port_ops;
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2008-07-23 17:55:53 +00:00
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ide_task_t task;
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2008-04-17 22:46:26 +00:00
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2008-04-26 20:25:14 +00:00
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if (port_ops && port_ops->selectproc)
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port_ops->selectproc(drive);
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2008-04-17 22:46:26 +00:00
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2008-07-23 17:55:53 +00:00
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memset(&task, 0, sizeof(task));
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task.tf_flags = IDE_TFLAG_OUT_DEVICE;
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2008-07-23 17:55:56 +00:00
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drive->hwif->tp_ops->tf_load(drive, &task);
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2005-04-16 22:20:36 +00:00
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}
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2008-07-15 19:21:48 +00:00
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void SELECT_MASK(ide_drive_t *drive, int mask)
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2005-04-16 22:20:36 +00:00
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{
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2008-04-26 20:25:14 +00:00
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const struct ide_port_ops *port_ops = drive->hwif->port_ops;
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if (port_ops && port_ops->maskproc)
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port_ops->maskproc(drive, mask);
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2005-04-16 22:20:36 +00:00
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}
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2008-07-23 17:55:53 +00:00
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u8 ide_read_error(ide_drive_t *drive)
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{
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ide_task_t task;
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memset(&task, 0, sizeof(task));
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task.tf_flags = IDE_TFLAG_IN_FEATURE;
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2008-07-23 17:55:56 +00:00
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drive->hwif->tp_ops->tf_read(drive, &task);
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2008-07-23 17:55:53 +00:00
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return task.tf.error;
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}
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EXPORT_SYMBOL_GPL(ide_read_error);
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2008-10-10 20:39:19 +00:00
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void ide_fix_driveid(u16 *id)
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2005-04-16 22:20:36 +00:00
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{
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#ifndef __LITTLE_ENDIAN
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# ifdef __BIG_ENDIAN
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int i;
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2008-10-10 20:39:18 +00:00
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2008-10-10 20:39:19 +00:00
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for (i = 0; i < 256; i++)
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2008-10-10 20:39:18 +00:00
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id[i] = __le16_to_cpu(id[i]);
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2005-04-16 22:20:36 +00:00
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# else
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# error "Please fix <asm/byteorder.h>"
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# endif
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#endif
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}
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2007-11-05 20:42:29 +00:00
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/*
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* ide_fixstring() cleans up and (optionally) byte-swaps a text string,
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* removing leading/trailing blanks and compressing internal blanks.
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* It is primarily used to tidy up the model name/number fields as
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2008-10-10 20:39:21 +00:00
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* returned by the ATA_CMD_ID_ATA[PI] commands.
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2007-11-05 20:42:29 +00:00
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*/
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2009-03-24 22:22:47 +00:00
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void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
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2005-04-16 22:20:36 +00:00
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{
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ide: re-code ide_fixstring() loop to be less evil
On Friday 25 July 2008, Linus Torvalds wrote:
>
> On Fri, 25 Jul 2008, Ben Dooks wrote:
> >
> > personally, i would much prefer to see the loop being less evil
> > like:
> >
> > for (p = s; p < end; p += 2)
> > be16_to_cpus((u16 *)p);
>
> Well, in this case, the code actually depends on 'p' being back at the
> start of the buffer by the end of it all, so it would need some more
> changes than that.
>
> But yes, I applied David's patch, but I _also_ suspect that we would be
> better off without code that does horrid things like casts and assignments
> inside the function arguments.
>
> So it would be nice to re-code that loop to be more readable. But due to
> the reliance of 'p' being 's' after the loop, the minimal patch would be
> something like the appended.
>
> Bartlomiej - take this or not, I'm not going to commit it - I haven't
> tested it, nor do I even have any machines that would trigger it. So this
> is more a "maybe something like this" than anything else.
From: Linus Torvalds <torvalds@linux-foundation.org>
CC: Ben Dooks <ben-linux@fluff.org>
Cc: David Miller <davem@davemloft.net>
Cc: harvey.harrison@gmail.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-10-10 20:39:22 +00:00
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u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
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2005-04-16 22:20:36 +00:00
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if (byteswap) {
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/* convert from big-endian to host byte order */
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ide: re-code ide_fixstring() loop to be less evil
On Friday 25 July 2008, Linus Torvalds wrote:
>
> On Fri, 25 Jul 2008, Ben Dooks wrote:
> >
> > personally, i would much prefer to see the loop being less evil
> > like:
> >
> > for (p = s; p < end; p += 2)
> > be16_to_cpus((u16 *)p);
>
> Well, in this case, the code actually depends on 'p' being back at the
> start of the buffer by the end of it all, so it would need some more
> changes than that.
>
> But yes, I applied David's patch, but I _also_ suspect that we would be
> better off without code that does horrid things like casts and assignments
> inside the function arguments.
>
> So it would be nice to re-code that loop to be more readable. But due to
> the reliance of 'p' being 's' after the loop, the minimal patch would be
> something like the appended.
>
> Bartlomiej - take this or not, I'm not going to commit it - I haven't
> tested it, nor do I even have any machines that would trigger it. So this
> is more a "maybe something like this" than anything else.
From: Linus Torvalds <torvalds@linux-foundation.org>
CC: Ben Dooks <ben-linux@fluff.org>
Cc: David Miller <davem@davemloft.net>
Cc: harvey.harrison@gmail.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-10-10 20:39:22 +00:00
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for (p = s ; p != end ; p += 2)
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be16_to_cpus((u16 *) p);
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2005-04-16 22:20:36 +00:00
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}
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ide: re-code ide_fixstring() loop to be less evil
On Friday 25 July 2008, Linus Torvalds wrote:
>
> On Fri, 25 Jul 2008, Ben Dooks wrote:
> >
> > personally, i would much prefer to see the loop being less evil
> > like:
> >
> > for (p = s; p < end; p += 2)
> > be16_to_cpus((u16 *)p);
>
> Well, in this case, the code actually depends on 'p' being back at the
> start of the buffer by the end of it all, so it would need some more
> changes than that.
>
> But yes, I applied David's patch, but I _also_ suspect that we would be
> better off without code that does horrid things like casts and assignments
> inside the function arguments.
>
> So it would be nice to re-code that loop to be more readable. But due to
> the reliance of 'p' being 's' after the loop, the minimal patch would be
> something like the appended.
>
> Bartlomiej - take this or not, I'm not going to commit it - I haven't
> tested it, nor do I even have any machines that would trigger it. So this
> is more a "maybe something like this" than anything else.
From: Linus Torvalds <torvalds@linux-foundation.org>
CC: Ben Dooks <ben-linux@fluff.org>
Cc: David Miller <davem@davemloft.net>
Cc: harvey.harrison@gmail.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-10-10 20:39:22 +00:00
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2005-04-16 22:20:36 +00:00
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/* strip leading blanks */
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ide: re-code ide_fixstring() loop to be less evil
On Friday 25 July 2008, Linus Torvalds wrote:
>
> On Fri, 25 Jul 2008, Ben Dooks wrote:
> >
> > personally, i would much prefer to see the loop being less evil
> > like:
> >
> > for (p = s; p < end; p += 2)
> > be16_to_cpus((u16 *)p);
>
> Well, in this case, the code actually depends on 'p' being back at the
> start of the buffer by the end of it all, so it would need some more
> changes than that.
>
> But yes, I applied David's patch, but I _also_ suspect that we would be
> better off without code that does horrid things like casts and assignments
> inside the function arguments.
>
> So it would be nice to re-code that loop to be more readable. But due to
> the reliance of 'p' being 's' after the loop, the minimal patch would be
> something like the appended.
>
> Bartlomiej - take this or not, I'm not going to commit it - I haven't
> tested it, nor do I even have any machines that would trigger it. So this
> is more a "maybe something like this" than anything else.
From: Linus Torvalds <torvalds@linux-foundation.org>
CC: Ben Dooks <ben-linux@fluff.org>
Cc: David Miller <davem@davemloft.net>
Cc: harvey.harrison@gmail.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-10-10 20:39:22 +00:00
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p = s;
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2005-04-16 22:20:36 +00:00
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while (s != end && *s == ' ')
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++s;
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/* compress internal blanks and strip trailing blanks */
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while (s != end && *s) {
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if (*s++ != ' ' || (s != end && *s && *s != ' '))
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*p++ = *(s-1);
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}
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/* wipe out trailing garbage */
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while (p != end)
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*p++ = '\0';
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}
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EXPORT_SYMBOL(ide_fixstring);
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/*
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* This routine busy-waits for the drive status to be not "busy".
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* It then checks the status for all of the "good" bits and none
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* of the "bad" bits, and if all is okay it returns 0. All other
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2007-10-13 15:47:49 +00:00
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* cases return error -- caller may then invoke ide_error().
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2005-04-16 22:20:36 +00:00
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*
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* This routine should get fixed to not hog the cpu during extra long waits..
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* That could be done by busy-waiting for the first jiffy or two, and then
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* setting a timer to wake up at half second intervals thereafter,
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* until timeout is achieved, before timing out.
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*/
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2009-03-24 22:22:47 +00:00
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static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
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unsigned long timeout, u8 *rstat)
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2005-04-16 22:20:36 +00:00
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{
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2008-07-23 17:55:52 +00:00
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ide_hwif_t *hwif = drive->hwif;
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2008-07-23 17:55:56 +00:00
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const struct ide_tp_ops *tp_ops = hwif->tp_ops;
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2005-04-16 22:20:36 +00:00
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unsigned long flags;
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2007-10-13 15:47:49 +00:00
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int i;
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u8 stat;
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2005-04-16 22:20:36 +00:00
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udelay(1); /* spec allows drive 400ns to assert "BUSY" */
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2008-07-23 17:55:56 +00:00
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stat = tp_ops->read_status(hwif);
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2008-02-06 01:57:51 +00:00
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2008-10-10 20:39:21 +00:00
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if (stat & ATA_BUSY) {
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2009-01-14 18:19:02 +00:00
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local_save_flags(flags);
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2009-01-06 16:20:52 +00:00
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local_irq_enable_in_hardirq();
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2005-04-16 22:20:36 +00:00
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timeout += jiffies;
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2008-10-10 20:39:21 +00:00
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while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
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2005-04-16 22:20:36 +00:00
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if (time_after(jiffies, timeout)) {
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/*
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* One last read after the timeout in case
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* heavy interrupt load made us not make any
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* progress during the timeout..
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*/
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2008-07-23 17:55:56 +00:00
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stat = tp_ops->read_status(hwif);
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2008-10-10 20:39:21 +00:00
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if ((stat & ATA_BUSY) == 0)
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2005-04-16 22:20:36 +00:00
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break;
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local_irq_restore(flags);
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2007-10-13 15:47:49 +00:00
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*rstat = stat;
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return -EBUSY;
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2005-04-16 22:20:36 +00:00
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}
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}
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local_irq_restore(flags);
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}
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/*
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* Allow status to settle, then read it again.
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* A few rare drives vastly violate the 400ns spec here,
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* so we'll wait up to 10usec for a "good" status
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* rather than expensively fail things immediately.
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* This fix courtesy of Matthew Faupel & Niccolo Rigacci.
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*/
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for (i = 0; i < 10; i++) {
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udelay(1);
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2008-07-23 17:55:56 +00:00
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stat = tp_ops->read_status(hwif);
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2008-02-06 01:57:51 +00:00
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if (OK_STAT(stat, good, bad)) {
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2007-10-13 15:47:49 +00:00
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*rstat = stat;
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2005-04-16 22:20:36 +00:00
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return 0;
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2007-10-13 15:47:49 +00:00
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}
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2005-04-16 22:20:36 +00:00
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}
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2007-10-13 15:47:49 +00:00
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*rstat = stat;
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return -EFAULT;
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}
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/*
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* In case of error returns error value after doing "*startstop = ide_error()".
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* The caller should return the updated value of "startstop" in this case,
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* "startstop" is unchanged when the function returns 0.
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*/
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2009-03-24 22:22:47 +00:00
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int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
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u8 bad, unsigned long timeout)
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2007-10-13 15:47:49 +00:00
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{
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int err;
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u8 stat;
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/* bail early if we've exceeded max_failures */
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if (drive->max_failures && (drive->failures > drive->max_failures)) {
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*startstop = ide_stopped;
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return 1;
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}
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err = __ide_wait_stat(drive, good, bad, timeout, &stat);
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if (err) {
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char *s = (err == -EBUSY) ? "status timeout" : "status error";
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*startstop = ide_error(drive, s, stat);
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}
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return err;
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2005-04-16 22:20:36 +00:00
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}
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EXPORT_SYMBOL(ide_wait_stat);
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2007-08-20 20:42:56 +00:00
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/**
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* ide_in_drive_list - look for drive in black/white list
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* @id: drive identifier
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2008-10-10 20:39:19 +00:00
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* @table: list to inspect
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2007-08-20 20:42:56 +00:00
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*
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* Look for a drive in the blacklist and the whitelist tables
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* Returns 1 if the drive is found in the table.
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*/
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2008-10-10 20:39:19 +00:00
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int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
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2007-08-20 20:42:56 +00:00
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{
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2008-10-10 20:39:19 +00:00
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for ( ; table->id_model; table++)
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if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
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(!table->id_firmware ||
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strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
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2007-08-20 20:42:56 +00:00
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return 1;
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return 0;
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}
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2007-08-20 20:42:57 +00:00
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EXPORT_SYMBOL_GPL(ide_in_drive_list);
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2007-08-20 20:42:56 +00:00
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/*
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* Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
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* We list them here and depend on the device side cable detection for them.
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2007-10-26 18:31:16 +00:00
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*
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* Some optical devices with the buggy firmwares have the same problem.
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2007-08-20 20:42:56 +00:00
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*/
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static const struct drive_list_entry ivb_list[] = {
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{ "QUANTUM FIREBALLlct10 05" , "A03.0900" },
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2007-10-26 18:31:16 +00:00
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|
|
{ "TSSTcorp CDDVDW SH-S202J" , "SB00" },
|
2007-11-27 20:35:57 +00:00
|
|
|
{ "TSSTcorp CDDVDW SH-S202J" , "SB01" },
|
|
|
|
{ "TSSTcorp CDDVDW SH-S202N" , "SB00" },
|
|
|
|
{ "TSSTcorp CDDVDW SH-S202N" , "SB01" },
|
2008-04-28 21:44:43 +00:00
|
|
|
{ "TSSTcorp CDDVDW SH-S202H" , "SB00" },
|
|
|
|
{ "TSSTcorp CDDVDW SH-S202H" , "SB01" },
|
2008-12-02 19:40:03 +00:00
|
|
|
{ "SAMSUNG SP0822N" , "WA100-10" },
|
2007-08-20 20:42:56 +00:00
|
|
|
{ NULL , NULL }
|
|
|
|
};
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* All hosts that use the 80c ribbon must use!
|
|
|
|
* The name is derived from upper byte of word 93 and the 80c ribbon.
|
|
|
|
*/
|
2009-03-24 22:22:47 +00:00
|
|
|
u8 eighty_ninty_three(ide_drive_t *drive)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-05-09 22:01:10 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2008-10-10 20:39:19 +00:00
|
|
|
u16 *id = drive->id;
|
2007-08-20 20:42:56 +00:00
|
|
|
int ivb = ide_in_drive_list(id, ivb_list);
|
2007-05-09 22:01:10 +00:00
|
|
|
|
2007-07-09 21:17:58 +00:00
|
|
|
if (hwif->cbl == ATA_CBL_PATA40_SHORT)
|
|
|
|
return 1;
|
|
|
|
|
2007-08-20 20:42:56 +00:00
|
|
|
if (ivb)
|
|
|
|
printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
|
|
|
|
drive->name);
|
|
|
|
|
2008-10-10 20:39:30 +00:00
|
|
|
if (ata_id_is_sata(id) && !ivb)
|
2008-01-10 22:03:42 +00:00
|
|
|
return 1;
|
|
|
|
|
2007-08-20 20:42:56 +00:00
|
|
|
if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
|
2007-05-09 22:01:10 +00:00
|
|
|
goto no_80w;
|
2006-06-28 11:26:58 +00:00
|
|
|
|
2007-03-26 21:03:18 +00:00
|
|
|
/*
|
|
|
|
* FIXME:
|
2008-03-29 18:48:21 +00:00
|
|
|
* - change master/slave IDENTIFY order
|
2007-08-20 20:42:56 +00:00
|
|
|
* - force bit13 (80c cable present) check also for !ivb devices
|
2007-03-26 21:03:18 +00:00
|
|
|
* (unless the slave device is pre-ATA3)
|
|
|
|
*/
|
2008-10-10 20:39:19 +00:00
|
|
|
if ((id[ATA_ID_HW_CONFIG] & 0x4000) ||
|
|
|
|
(ivb && (id[ATA_ID_HW_CONFIG] & 0x2000)))
|
2007-05-09 22:01:10 +00:00
|
|
|
return 1;
|
|
|
|
|
|
|
|
no_80w:
|
2008-10-13 19:39:36 +00:00
|
|
|
if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
|
2007-05-09 22:01:10 +00:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
|
|
|
|
"limiting max speed to UDMA33\n",
|
2007-07-09 21:17:58 +00:00
|
|
|
drive->name,
|
|
|
|
hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
|
2007-05-09 22:01:10 +00:00
|
|
|
|
2008-10-13 19:39:36 +00:00
|
|
|
drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
|
2007-05-09 22:01:10 +00:00
|
|
|
|
|
|
|
return 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2007-10-19 22:32:36 +00:00
|
|
|
int ide_driveid_update(ide_drive_t *drive)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-10-19 22:32:36 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2008-07-23 17:55:56 +00:00
|
|
|
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
|
2008-10-10 20:39:19 +00:00
|
|
|
u16 *id;
|
2008-10-10 20:39:23 +00:00
|
|
|
unsigned long flags;
|
2008-02-06 01:57:51 +00:00
|
|
|
u8 stat;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Re-read drive->id for possible DMA mode
|
|
|
|
* change (copied from ide-probe.c)
|
|
|
|
*/
|
|
|
|
|
|
|
|
SELECT_MASK(drive, 1);
|
2008-07-23 17:55:56 +00:00
|
|
|
tp_ops->set_irq(hwif, 0);
|
2005-04-16 22:20:36 +00:00
|
|
|
msleep(50);
|
2008-10-10 20:39:21 +00:00
|
|
|
tp_ops->exec_command(hwif, ATA_CMD_ID_ATA);
|
2008-02-06 01:57:51 +00:00
|
|
|
|
2008-10-10 20:39:23 +00:00
|
|
|
if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) {
|
|
|
|
SELECT_MASK(drive, 0);
|
|
|
|
return 0;
|
|
|
|
}
|
2008-02-06 01:57:51 +00:00
|
|
|
|
2008-10-10 20:39:21 +00:00
|
|
|
msleep(50); /* wait for IRQ and ATA_DRQ */
|
2008-07-23 17:55:56 +00:00
|
|
|
stat = tp_ops->read_status(hwif);
|
2008-02-06 01:57:51 +00:00
|
|
|
|
2008-10-10 20:39:21 +00:00
|
|
|
if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
SELECT_MASK(drive, 0);
|
|
|
|
printk("%s: CHECK for good STATUS\n", drive->name);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
|
|
SELECT_MASK(drive, 0);
|
2008-10-10 20:39:28 +00:00
|
|
|
id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!id) {
|
|
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
|
|
}
|
2008-07-23 17:55:56 +00:00
|
|
|
tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
|
|
|
|
(void)tp_ops->read_status(hwif); /* clear drive IRQ */
|
2005-04-16 22:20:36 +00:00
|
|
|
local_irq_enable();
|
|
|
|
local_irq_restore(flags);
|
|
|
|
ide_fix_driveid(id);
|
2008-10-10 20:39:19 +00:00
|
|
|
|
|
|
|
drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
|
|
|
|
drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
|
|
|
|
drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
|
|
|
|
/* anything more ? */
|
|
|
|
|
|
|
|
kfree(id);
|
|
|
|
|
2008-10-13 19:39:36 +00:00
|
|
|
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
|
2008-10-10 20:39:19 +00:00
|
|
|
ide_dma_off(drive);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2007-10-13 15:47:49 +00:00
|
|
|
int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-10-13 15:47:49 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2008-07-23 17:55:56 +00:00
|
|
|
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
|
2008-10-10 20:39:19 +00:00
|
|
|
u16 *id = drive->id, i;
|
2007-11-27 20:35:52 +00:00
|
|
|
int error = 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
u8 stat;
|
2008-07-23 17:55:52 +00:00
|
|
|
ide_task_t task;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
2008-04-26 20:25:24 +00:00
|
|
|
if (hwif->dma_ops) /* check if host supports DMA */
|
|
|
|
hwif->dma_ops->dma_host_set(drive, 0);
|
2005-04-16 22:20:36 +00:00
|
|
|
#endif
|
|
|
|
|
2007-11-27 20:35:52 +00:00
|
|
|
/* Skip setting PIO flow-control modes on pre-EIDE drives */
|
2008-10-10 20:39:19 +00:00
|
|
|
if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
|
2007-11-27 20:35:52 +00:00
|
|
|
goto skip;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* Don't use ide_wait_cmd here - it will
|
|
|
|
* attempt to set_geometry and recalibrate,
|
|
|
|
* but for some reason these don't work at
|
|
|
|
* this point (lost interrupt).
|
|
|
|
*/
|
2009-03-24 22:22:47 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* FIXME: we race against the running IRQ here if
|
|
|
|
* this is called from non IRQ context. If we use
|
|
|
|
* disable_irq() we hang on the error path. Work
|
|
|
|
* is needed.
|
|
|
|
*/
|
2009-03-24 22:22:47 +00:00
|
|
|
disable_irq_nosync(hwif->irq);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
udelay(1);
|
|
|
|
SELECT_DRIVE(drive);
|
2008-10-17 16:09:15 +00:00
|
|
|
SELECT_MASK(drive, 1);
|
2005-04-16 22:20:36 +00:00
|
|
|
udelay(1);
|
2008-07-23 17:55:56 +00:00
|
|
|
tp_ops->set_irq(hwif, 0);
|
2008-07-23 17:55:52 +00:00
|
|
|
|
|
|
|
memset(&task, 0, sizeof(task));
|
|
|
|
task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
|
|
|
|
task.tf.feature = SETFEATURES_XFER;
|
|
|
|
task.tf.nsect = speed;
|
|
|
|
|
2008-07-23 17:55:56 +00:00
|
|
|
tp_ops->tf_load(drive, &task);
|
2008-07-23 17:55:52 +00:00
|
|
|
|
2008-10-10 20:39:21 +00:00
|
|
|
tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
|
2008-07-23 17:55:52 +00:00
|
|
|
|
2008-01-26 19:13:08 +00:00
|
|
|
if (drive->quirk_list == 2)
|
2008-07-23 17:55:56 +00:00
|
|
|
tp_ops->set_irq(hwif, 1);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-10-13 15:47:49 +00:00
|
|
|
error = __ide_wait_stat(drive, drive->ready_stat,
|
2008-10-10 20:39:21 +00:00
|
|
|
ATA_BUSY | ATA_DRQ | ATA_ERR,
|
2007-10-13 15:47:49 +00:00
|
|
|
WAIT_CMD, &stat);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
SELECT_MASK(drive, 0);
|
|
|
|
|
|
|
|
enable_irq(hwif->irq);
|
|
|
|
|
|
|
|
if (error) {
|
|
|
|
(void) ide_dump_status(drive, "set_drive_speed_status", stat);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2008-10-10 20:39:19 +00:00
|
|
|
id[ATA_ID_UDMA_MODES] &= ~0xFF00;
|
|
|
|
id[ATA_ID_MWDMA_MODES] &= ~0x0F00;
|
|
|
|
id[ATA_ID_SWDMA_MODES] &= ~0x0F00;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-11-27 20:35:52 +00:00
|
|
|
skip:
|
2005-04-16 22:20:36 +00:00
|
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
2008-10-13 19:39:36 +00:00
|
|
|
if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
|
2008-04-26 20:25:24 +00:00
|
|
|
hwif->dma_ops->dma_host_set(drive, 1);
|
|
|
|
else if (hwif->dma_ops) /* check if host supports DMA */
|
2008-01-26 19:13:01 +00:00
|
|
|
ide_dma_off_quietly(drive);
|
2005-04-16 22:20:36 +00:00
|
|
|
#endif
|
|
|
|
|
2008-10-10 20:39:19 +00:00
|
|
|
if (speed >= XFER_UDMA_0) {
|
|
|
|
i = 1 << (speed - XFER_UDMA_0);
|
|
|
|
id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
|
|
|
|
} else if (speed >= XFER_MW_DMA_0) {
|
|
|
|
i = 1 << (speed - XFER_MW_DMA_0);
|
|
|
|
id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
|
|
|
|
} else if (speed >= XFER_SW_DMA_0) {
|
|
|
|
i = 1 << (speed - XFER_SW_DMA_0);
|
|
|
|
id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2008-10-10 20:39:19 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (!drive->init_speed)
|
|
|
|
drive->init_speed = speed;
|
|
|
|
drive->current_speed = speed;
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This should get invoked any time we exit the driver to
|
|
|
|
* wait for an interrupt response from a drive. handler() points
|
|
|
|
* at the appropriate code to handle the next interrupt, and a
|
|
|
|
* timer is started to prevent us from waiting forever in case
|
|
|
|
* something goes wrong (see the ide_timer_expiry() handler later on).
|
|
|
|
*
|
|
|
|
* See also ide_execute_command
|
|
|
|
*/
|
|
|
|
static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
|
|
|
|
unsigned int timeout, ide_expiry_t *expiry)
|
|
|
|
{
|
2009-01-06 16:20:50 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
|
|
|
|
|
|
BUG_ON(hwif->handler);
|
|
|
|
hwif->handler = handler;
|
|
|
|
hwif->expiry = expiry;
|
|
|
|
hwif->timer.expires = jiffies + timeout;
|
|
|
|
hwif->req_gen_timer = hwif->req_gen;
|
|
|
|
add_timer(&hwif->timer);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
|
|
|
|
unsigned int timeout, ide_expiry_t *expiry)
|
|
|
|
{
|
2009-01-06 16:20:50 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2005-04-16 22:20:36 +00:00
|
|
|
unsigned long flags;
|
2008-12-29 19:27:31 +00:00
|
|
|
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_lock_irqsave(&hwif->lock, flags);
|
2005-04-16 22:20:36 +00:00
|
|
|
__ide_set_handler(drive, handler, timeout, expiry);
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_unlock_irqrestore(&hwif->lock, flags);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(ide_set_handler);
|
2009-03-24 22:22:47 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/**
|
|
|
|
* ide_execute_command - execute an IDE command
|
|
|
|
* @drive: IDE drive to issue the command against
|
|
|
|
* @command: command byte to write
|
|
|
|
* @handler: handler for next phase
|
|
|
|
* @timeout: timeout for command
|
|
|
|
* @expiry: handler to run on timeout
|
|
|
|
*
|
|
|
|
* Helper function to issue an IDE command. This handles the
|
2009-03-24 22:22:47 +00:00
|
|
|
* atomicity requirements, command timing and ensures that the
|
2005-04-16 22:20:36 +00:00
|
|
|
* handler and IRQ setup do not race. All IDE command kick off
|
|
|
|
* should go via this function or do equivalent locking.
|
|
|
|
*/
|
2008-01-25 21:17:06 +00:00
|
|
|
|
|
|
|
void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
|
|
|
|
unsigned timeout, ide_expiry_t *expiry)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-12-29 19:27:31 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2005-04-16 22:20:36 +00:00
|
|
|
unsigned long flags;
|
2008-02-02 18:56:46 +00:00
|
|
|
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_lock_irqsave(&hwif->lock, flags);
|
2008-02-02 18:56:46 +00:00
|
|
|
__ide_set_handler(drive, handler, timeout, expiry);
|
2008-07-23 17:55:56 +00:00
|
|
|
hwif->tp_ops->exec_command(hwif, cmd);
|
2008-02-02 18:56:46 +00:00
|
|
|
/*
|
|
|
|
* Drive takes 400nS to respond, we must avoid the IRQ being
|
|
|
|
* serviced before that.
|
|
|
|
*
|
|
|
|
* FIXME: we could skip this delay with care on non shared devices
|
|
|
|
*/
|
2005-04-16 22:20:36 +00:00
|
|
|
ndelay(400);
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_unlock_irqrestore(&hwif->lock, flags);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(ide_execute_command);
|
|
|
|
|
2008-04-28 21:44:39 +00:00
|
|
|
void ide_execute_pkt_cmd(ide_drive_t *drive)
|
|
|
|
{
|
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
|
|
unsigned long flags;
|
|
|
|
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_lock_irqsave(&hwif->lock, flags);
|
2008-10-10 20:39:21 +00:00
|
|
|
hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET);
|
2008-04-28 21:44:39 +00:00
|
|
|
ndelay(400);
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_unlock_irqrestore(&hwif->lock, flags);
|
2008-04-28 21:44:39 +00:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-07-16 18:33:48 +00:00
|
|
|
static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
|
2008-07-16 18:33:48 +00:00
|
|
|
{
|
2009-01-06 16:20:50 +00:00
|
|
|
struct request *rq = drive->hwif->rq;
|
2008-07-16 18:33:48 +00:00
|
|
|
|
|
|
|
if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
|
2008-07-16 18:33:48 +00:00
|
|
|
ide_end_request(drive, err ? err : 1, 0);
|
2008-07-16 18:33:48 +00:00
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/* needed below */
|
2009-03-24 22:22:47 +00:00
|
|
|
static ide_startstop_t do_reset1(ide_drive_t *, int);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/*
|
2009-03-24 22:22:47 +00:00
|
|
|
* atapi_reset_pollfunc() gets invoked to poll the interface for completion
|
|
|
|
* every 50ms during an atapi drive reset operation. If the drive has not yet
|
|
|
|
* responded, and we have not yet hit our maximum waiting time, then the timer
|
|
|
|
* is restarted for another 50ms.
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
2009-03-24 22:22:47 +00:00
|
|
|
static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-07-23 17:55:52 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2005-04-16 22:20:36 +00:00
|
|
|
u8 stat;
|
|
|
|
|
|
|
|
SELECT_DRIVE(drive);
|
2009-03-24 22:22:47 +00:00
|
|
|
udelay(10);
|
2008-07-23 17:55:56 +00:00
|
|
|
stat = hwif->tp_ops->read_status(hwif);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-10-10 20:39:21 +00:00
|
|
|
if (OK_STAT(stat, 0, ATA_BUSY))
|
2009-03-24 22:22:47 +00:00
|
|
|
printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name);
|
2008-02-06 01:57:51 +00:00
|
|
|
else {
|
2009-01-06 16:20:50 +00:00
|
|
|
if (time_before(jiffies, hwif->poll_timeout)) {
|
2009-03-24 22:22:47 +00:00
|
|
|
ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20,
|
|
|
|
NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
/* continue polling */
|
|
|
|
return ide_started;
|
|
|
|
}
|
|
|
|
/* end of polling */
|
2009-01-06 16:20:50 +00:00
|
|
|
hwif->polling = 0;
|
2009-03-24 22:22:47 +00:00
|
|
|
printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n",
|
|
|
|
drive->name, stat);
|
2005-04-16 22:20:36 +00:00
|
|
|
/* do it the old fashioned way */
|
|
|
|
return do_reset1(drive, 1);
|
|
|
|
}
|
|
|
|
/* done polling */
|
2009-01-06 16:20:50 +00:00
|
|
|
hwif->polling = 0;
|
2008-07-16 18:33:48 +00:00
|
|
|
ide_complete_drive_reset(drive, 0);
|
2005-04-16 22:20:36 +00:00
|
|
|
return ide_stopped;
|
|
|
|
}
|
|
|
|
|
2008-10-13 19:39:41 +00:00
|
|
|
static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
|
|
|
|
{
|
|
|
|
static const char *err_master_vals[] =
|
|
|
|
{ NULL, "passed", "formatter device error",
|
|
|
|
"sector buffer error", "ECC circuitry error",
|
|
|
|
"controlling MPU error" };
|
|
|
|
|
|
|
|
u8 err_master = err & 0x7f;
|
|
|
|
|
|
|
|
printk(KERN_ERR "%s: reset: master: ", hwif->name);
|
|
|
|
if (err_master && err_master < 6)
|
|
|
|
printk(KERN_CONT "%s", err_master_vals[err_master]);
|
|
|
|
else
|
|
|
|
printk(KERN_CONT "error (0x%02x?)", err);
|
|
|
|
if (err & 0x80)
|
|
|
|
printk(KERN_CONT "; slave: failed");
|
|
|
|
printk(KERN_CONT "\n");
|
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* reset_pollfunc() gets invoked to poll the interface for completion every 50ms
|
|
|
|
* during an ide reset operation. If the drives have not yet responded,
|
|
|
|
* and we have not yet hit our maximum waiting time, then the timer is restarted
|
|
|
|
* for another 50ms.
|
|
|
|
*/
|
2009-03-24 22:22:47 +00:00
|
|
|
static ide_startstop_t reset_pollfunc(ide_drive_t *drive)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2009-01-06 16:20:52 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2008-04-26 20:25:14 +00:00
|
|
|
const struct ide_port_ops *port_ops = hwif->port_ops;
|
2005-04-16 22:20:36 +00:00
|
|
|
u8 tmp;
|
2008-07-16 18:33:48 +00:00
|
|
|
int err = 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-04-26 20:25:14 +00:00
|
|
|
if (port_ops && port_ops->reset_poll) {
|
2008-07-16 18:33:48 +00:00
|
|
|
err = port_ops->reset_poll(drive);
|
|
|
|
if (err) {
|
2005-04-16 22:20:36 +00:00
|
|
|
printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
|
|
|
|
hwif->name, drive->name);
|
2008-07-16 18:33:48 +00:00
|
|
|
goto out;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-23 17:55:56 +00:00
|
|
|
tmp = hwif->tp_ops->read_status(hwif);
|
2008-02-06 01:57:51 +00:00
|
|
|
|
2008-10-10 20:39:21 +00:00
|
|
|
if (!OK_STAT(tmp, 0, ATA_BUSY)) {
|
2009-01-06 16:20:50 +00:00
|
|
|
if (time_before(jiffies, hwif->poll_timeout)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
|
|
|
|
/* continue polling */
|
|
|
|
return ide_started;
|
|
|
|
}
|
2009-03-24 22:22:47 +00:00
|
|
|
printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n",
|
|
|
|
hwif->name, tmp);
|
2005-04-16 22:20:36 +00:00
|
|
|
drive->failures++;
|
2008-07-16 18:33:48 +00:00
|
|
|
err = -EIO;
|
2005-04-16 22:20:36 +00:00
|
|
|
} else {
|
2008-02-06 01:57:51 +00:00
|
|
|
tmp = ide_read_error(drive);
|
|
|
|
|
|
|
|
if (tmp == 1) {
|
2008-10-13 19:39:41 +00:00
|
|
|
printk(KERN_INFO "%s: reset: success\n", hwif->name);
|
2005-04-16 22:20:36 +00:00
|
|
|
drive->failures = 0;
|
|
|
|
} else {
|
2008-10-13 19:39:41 +00:00
|
|
|
ide_reset_report_error(hwif, tmp);
|
2005-04-16 22:20:36 +00:00
|
|
|
drive->failures++;
|
2008-07-16 18:33:48 +00:00
|
|
|
err = -EIO;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
2008-07-16 18:33:48 +00:00
|
|
|
out:
|
2009-01-06 16:20:50 +00:00
|
|
|
hwif->polling = 0; /* done polling */
|
2008-07-16 18:33:48 +00:00
|
|
|
ide_complete_drive_reset(drive, err);
|
2005-04-16 22:20:36 +00:00
|
|
|
return ide_stopped;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ide_disk_pre_reset(ide_drive_t *drive)
|
|
|
|
{
|
2008-10-10 20:39:19 +00:00
|
|
|
int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
drive->special.all = 0;
|
|
|
|
drive->special.b.set_geometry = legacy;
|
|
|
|
drive->special.b.recalibrate = legacy;
|
2008-10-13 19:39:36 +00:00
|
|
|
|
2008-01-25 21:17:08 +00:00
|
|
|
drive->mult_count = 0;
|
2008-10-13 19:39:50 +00:00
|
|
|
drive->dev_flags &= ~IDE_DFLAG_PARKED;
|
2008-10-13 19:39:36 +00:00
|
|
|
|
|
|
|
if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
|
|
|
|
(drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
|
2005-04-16 22:20:36 +00:00
|
|
|
drive->mult_req = 0;
|
2008-10-13 19:39:36 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (drive->mult_req != drive->mult_count)
|
|
|
|
drive->special.b.set_multmode = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void pre_reset(ide_drive_t *drive)
|
|
|
|
{
|
2008-04-26 20:25:14 +00:00
|
|
|
const struct ide_port_ops *port_ops = drive->hwif->port_ops;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (drive->media == ide_disk)
|
|
|
|
ide_disk_pre_reset(drive);
|
|
|
|
else
|
2008-10-13 19:39:36 +00:00
|
|
|
drive->dev_flags |= IDE_DFLAG_POST_RESET;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-10-13 19:39:36 +00:00
|
|
|
if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
|
2008-02-02 18:56:47 +00:00
|
|
|
if (drive->crc_count)
|
2008-02-02 18:56:47 +00:00
|
|
|
ide_check_dma_crc(drive);
|
2008-02-02 18:56:47 +00:00
|
|
|
else
|
|
|
|
ide_dma_off(drive);
|
|
|
|
}
|
|
|
|
|
2008-10-13 19:39:36 +00:00
|
|
|
if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
|
|
|
|
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
|
|
|
|
drive->dev_flags &= ~IDE_DFLAG_UNMASK;
|
2005-04-16 22:20:36 +00:00
|
|
|
drive->io_32bit = 0;
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2008-04-26 20:25:14 +00:00
|
|
|
if (port_ops && port_ops->pre_reset)
|
|
|
|
port_ops->pre_reset(drive);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-03-26 21:03:20 +00:00
|
|
|
if (drive->current_speed != 0xff)
|
|
|
|
drive->desired_speed = drive->current_speed;
|
|
|
|
drive->current_speed = 0xff;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* do_reset1() attempts to recover a confused drive by resetting it.
|
|
|
|
* Unfortunately, resetting a disk drive actually resets all devices on
|
|
|
|
* the same interface, so it can really be thought of as resetting the
|
|
|
|
* interface rather than resetting the drive.
|
|
|
|
*
|
|
|
|
* ATAPI devices have their own reset mechanism which allows them to be
|
|
|
|
* individually reset without clobbering other devices on the same interface.
|
|
|
|
*
|
|
|
|
* Unfortunately, the IDE interface does not generate an interrupt to let
|
|
|
|
* us know when the reset operation has finished, so we must poll for this.
|
|
|
|
* Equally poor, though, is the fact that this may a very long time to complete,
|
|
|
|
* (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
|
|
|
|
* we set a timer to poll at 50ms intervals.
|
|
|
|
*/
|
2009-03-24 22:22:47 +00:00
|
|
|
static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-12-29 19:27:31 +00:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
|
|
struct ide_io_ports *io_ports = &hwif->io_ports;
|
|
|
|
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
|
2008-04-26 20:25:14 +00:00
|
|
|
const struct ide_port_ops *port_ops;
|
2009-01-06 16:20:56 +00:00
|
|
|
ide_drive_t *tdrive;
|
2008-12-29 19:27:31 +00:00
|
|
|
unsigned long flags, timeout;
|
2009-01-06 16:20:56 +00:00
|
|
|
int i;
|
2008-10-13 19:39:50 +00:00
|
|
|
DEFINE_WAIT(wait);
|
2008-04-17 22:46:26 +00:00
|
|
|
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_lock_irqsave(&hwif->lock, flags);
|
2008-07-23 17:55:56 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/* We must not reset with running handlers */
|
2009-01-06 16:20:50 +00:00
|
|
|
BUG_ON(hwif->handler != NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
/* For an ATAPI device, first try an ATAPI SRST. */
|
|
|
|
if (drive->media != ide_disk && !do_not_try_atapi) {
|
|
|
|
pre_reset(drive);
|
|
|
|
SELECT_DRIVE(drive);
|
2009-03-24 22:22:47 +00:00
|
|
|
udelay(20);
|
2008-10-10 20:39:21 +00:00
|
|
|
tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
|
2005-06-27 22:24:25 +00:00
|
|
|
ndelay(400);
|
2009-01-06 16:20:50 +00:00
|
|
|
hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
|
|
|
|
hwif->polling = 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
__ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_unlock_irqrestore(&hwif->lock, flags);
|
2005-04-16 22:20:36 +00:00
|
|
|
return ide_started;
|
|
|
|
}
|
|
|
|
|
2008-10-13 19:39:50 +00:00
|
|
|
/* We must not disturb devices in the IDE_DFLAG_PARKED state. */
|
|
|
|
do {
|
|
|
|
unsigned long now;
|
|
|
|
|
|
|
|
prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
|
|
|
|
timeout = jiffies;
|
2009-03-24 22:22:41 +00:00
|
|
|
ide_port_for_each_present_dev(i, tdrive, hwif) {
|
|
|
|
if ((tdrive->dev_flags & IDE_DFLAG_PARKED) &&
|
2008-10-13 19:39:50 +00:00
|
|
|
time_after(tdrive->sleep, timeout))
|
|
|
|
timeout = tdrive->sleep;
|
|
|
|
}
|
|
|
|
|
|
|
|
now = jiffies;
|
|
|
|
if (time_before_eq(timeout, now))
|
|
|
|
break;
|
|
|
|
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_unlock_irqrestore(&hwif->lock, flags);
|
2008-10-13 19:39:50 +00:00
|
|
|
timeout = schedule_timeout_uninterruptible(timeout - now);
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_lock_irqsave(&hwif->lock, flags);
|
2008-10-13 19:39:50 +00:00
|
|
|
} while (timeout);
|
|
|
|
finish_wait(&ide_park_wq, &wait);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* First, reset any device state data we were maintaining
|
|
|
|
* for any of the drives on this interface.
|
|
|
|
*/
|
2009-01-06 16:20:56 +00:00
|
|
|
ide_port_for_each_dev(i, tdrive, hwif)
|
|
|
|
pre_reset(tdrive);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2008-04-27 13:38:32 +00:00
|
|
|
if (io_ports->ctl_addr == 0) {
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_unlock_irqrestore(&hwif->lock, flags);
|
2008-07-16 18:33:48 +00:00
|
|
|
ide_complete_drive_reset(drive, -ENXIO);
|
2005-04-16 22:20:36 +00:00
|
|
|
return ide_stopped;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Note that we also set nIEN while resetting the device,
|
|
|
|
* to mask unwanted interrupts from the interface during the reset.
|
|
|
|
* However, due to the design of PC hardware, this will cause an
|
|
|
|
* immediate interrupt due to the edge transition it produces.
|
|
|
|
* This single interrupt gives us a "fast poll" for drives that
|
|
|
|
* recover from reset very quickly, saving us the first 50ms wait time.
|
2008-07-23 17:55:52 +00:00
|
|
|
*
|
|
|
|
* TODO: add ->softreset method and stop abusing ->set_irq
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
/* set SRST and nIEN */
|
2008-07-23 17:55:56 +00:00
|
|
|
tp_ops->set_irq(hwif, 4);
|
2005-04-16 22:20:36 +00:00
|
|
|
/* more than enough time */
|
|
|
|
udelay(10);
|
2008-07-23 17:55:52 +00:00
|
|
|
/* clear SRST, leave nIEN (unless device is on the quirk list) */
|
2008-07-23 17:55:56 +00:00
|
|
|
tp_ops->set_irq(hwif, drive->quirk_list == 2);
|
2005-04-16 22:20:36 +00:00
|
|
|
/* more than enough time */
|
|
|
|
udelay(10);
|
2009-01-06 16:20:50 +00:00
|
|
|
hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
|
|
|
|
hwif->polling = 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
__ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Some weird controller like resetting themselves to a strange
|
|
|
|
* state when the disks are reset this way. At least, the Winbond
|
|
|
|
* 553 documentation says that
|
|
|
|
*/
|
2008-04-26 20:25:14 +00:00
|
|
|
port_ops = hwif->port_ops;
|
|
|
|
if (port_ops && port_ops->resetproc)
|
|
|
|
port_ops->resetproc(drive);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2009-01-06 16:20:50 +00:00
|
|
|
spin_unlock_irqrestore(&hwif->lock, flags);
|
2005-04-16 22:20:36 +00:00
|
|
|
return ide_started;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ide_do_reset() is the entry point to the drive/interface reset code.
|
|
|
|
*/
|
|
|
|
|
2009-03-24 22:22:47 +00:00
|
|
|
ide_startstop_t ide_do_reset(ide_drive_t *drive)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
return do_reset1(drive, 0);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(ide_do_reset);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ide_wait_not_busy() waits for the currently selected device on the hwif
|
2008-02-01 22:09:36 +00:00
|
|
|
* to report a non-busy status, see comments in ide_probe_port().
|
2005-04-16 22:20:36 +00:00
|
|
|
*/
|
|
|
|
int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
|
|
|
|
{
|
|
|
|
u8 stat = 0;
|
|
|
|
|
2009-03-24 22:22:47 +00:00
|
|
|
while (timeout--) {
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* Turn this into a schedule() sleep once I'm sure
|
|
|
|
* about locking issues (2.5 work ?).
|
|
|
|
*/
|
|
|
|
mdelay(1);
|
2008-07-23 17:55:56 +00:00
|
|
|
stat = hwif->tp_ops->read_status(hwif);
|
2008-10-10 20:39:21 +00:00
|
|
|
if ((stat & ATA_BUSY) == 0)
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
/*
|
|
|
|
* Assume a value of 0xff means nothing is connected to
|
|
|
|
* the interface and it doesn't implement the pull-down
|
|
|
|
* resistor on D7.
|
|
|
|
*/
|
|
|
|
if (stat == 0xff)
|
|
|
|
return -ENODEV;
|
2006-02-03 11:04:55 +00:00
|
|
|
touch_softlockup_watchdog();
|
2006-07-30 10:03:29 +00:00
|
|
|
touch_nmi_watchdog();
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
return -EBUSY;
|
|
|
|
}
|