Commit Graph

12 Commits

Author SHA1 Message Date
Julia Lawall 041b5eac25 drivers/ata: use resource_size
Use the function resource_size, which reduces the chance of introducing
off-by-one errors in calculating the resource size.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
struct resource *res;
@@

- (res->end - res->start) + 1
+ resource_size(res)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-09-11 02:25:58 -04:00
Florian Fainelli 9223d01b2f pata-rb532-cf: platform_get_irq() fix ignored failure
platform_get_irq() can return -ENXIO, but since 'irq' is an
unsigned int, it does not show when the IRQ resource wasn't found.
Make irq an int so that we can use a single variable to test the
platform_get_irq() return value.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-03-24 22:16:34 -04:00
Erik Inge Bolsø 14bdef982c [libata] convert drivers to use ata.h mode mask defines
No functional changes in this patch.

Signed-off-by: Erik Inge Bolsø <knan-lkml@anduin.net>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-03-24 22:13:27 -04:00
Phil Sutter 6be976e79d pata-rb532-cf: drop custom freeze and thaw
I'm not quite sure what freezing and thawing is used for. Tests showed
that the port is being frozen at initialisation state and thawed right
afterwards, then the functions were not called anymore. Dropping the
complete custom code for handling the frozen state seems to work at
least for a standard use case including mounting a partition, copying
some files in it (in parallel) and finally removing them and unmounting
the partition.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-03-24 22:02:40 -04:00
Phil Sutter 180bd147f1 pata-rb532-cf: use ata_sff_data_xfer32()
The biggest difference between rb532_pata_data_xfer() and
ata_sff_data_xfer32() is the call to ata_sff_pause() at the end of
rb532_pata_data_xfer() which I suppose to be unnecessary since it works
without. I've also tested using ata_sff_data_xfer() as replacement, but
since we know that the driver supports 32bit IO, using the optimised
version should be safe.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-03-24 22:02:39 -04:00
Phil Sutter bff9ad3c4c pata-rb532-cf: use ata_sff_exec_command()
The only difference between rb532_pata_exec_command() and
ata_sff_exec_command() is added debugging output, so it can be dropped
and the standard op used instead.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-03-24 22:02:39 -04:00
Phil Sutter 96b34ce7ca pata-rb532-cf: replace rb532_pata_finish_io()
Since the delay used internally is just the same as ata_sff_pause()
uses, rb532_pata_finish_io() does exactly the same as ata_sff_pause()
and thus can be replaced by the later one.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-03-24 22:02:39 -04:00
Phil Sutter b98f504639 pata-rb532-cf: remove set_irq_type from finish_io
The driver has been tested without the call to set_irq_type at this
point and occurs to work fine, so it should be safe to remove it.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2009-01-27 02:13:03 -05:00
Phil Sutter 03f60840fa [libata] pata_rb532_cf: fix signature of the xfer function
Per definition, this function should return the number of bytes
consumed. As the original parameter "buflen" is being decremented inside
the read/write loop, save it in "retlen" at the beginning.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Acked-by: Sergei Shtyltov <sshtylyov@ru.mvista.com>
Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-12-01 13:49:17 -05:00
Phil Sutter 9f14786e27 [libata] pata_rb532_cf: fix and rename register definitions
The original standalone driver uses a custom address for the error
register. Use it in pata_rb532_cf, too.

Rename two register definitions:
- The address offset 0x0800 in fact is the ATA base, not ATA command
  address.
- The offset 0x0C00 is not a regular ATA data address, but a buffered one
  allowing 4-byte IO.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-12-01 13:49:08 -05:00
Alan Cox a57c1bade5 libata-sff: Fix oops reported in kerneloops.org for pnp devices with no ctl
- Make ata_sff_altstatus private so nobody uses it by mistake
- Drop the 400nS delay from it

Add

ata_sff_irq_status	-	encapsulates the IRQ check logic

This function keeps the existing behaviour for altstatus using devices. I
actually suspect the logic was wrong before the changes but -rc isn't the
time to play with that

ata_sff_sync		-	ensure writes hit the device

Really we want an io* operation for 'is posted' eg ioisposted(ioaddr) so
that we can fix the nasty delay this causes on most systems.

- ata_sff_pause		-	400nS delay

Ensure the command hit the device and delay 400nS

- ata_sff_dma_pause

Ensure the I/O hit the device and enforce an HDMA1:0 transition delay.
Requires altstatus register exists, BUG if not so we don't risk
corruption in MWDMA modes. (UDMA the checksum will save your backside in
theory)

The only other complication then is devices with their own handlers.
rb532 can use dma_pause but scc needs to access its own altstatus
register for internal errata workarounds so directly call the drivers own
altstatus function.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-06-04 06:40:41 -04:00
Ralf Baechle 3dd654bfdf [MIPS] ATA: Rename routerboard 500 to 532
The platform is actually named routerboard 532 so let's call it this.  This
patch only rename files, Kconfig and C symbols; no functional changes.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-29 02:16:25 -04:00