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AVR32 PATA driver

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Updated and simplified driver. Use only register transfer timing for both
data and register transfers. This gives poorer performance in PIO1 and 2,
but should not be a problem in PIO3 and 4, correct me if I'm wrong :)

The driver works very we'll but I still wonder about the interrupts. I have
an interrupt line, that works nicely when POLLING flag is not set. The
problem is the number of interrupts that eat away my CPU cycles.

When using the POLLING flag there seem to be some interrupts that dosen't get
cleared. Furthermore the device dosen't drive INTRQ high, it stays at 2.5 volts
and generates a lot of interrupts due to ripple / noise. What to do?

Signed-off-by: Kristoffer Nyborg Gregertsen <kngregertsen@norway.atmel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Kristoffer Nyborg Gregertsen
2007-08-08 16:57:08 +02:00
committed by Jeff Garzik
parent d830d1731f
commit 7c9ef8e418
3 changed files with 451 additions and 0 deletions
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drivers/ata/Kconfig
+9
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@@ -199,6 +199,15 @@ config PATA_ARTOP
If unsure, say N.
config PATA_AT32
tristate "Atmel AVR32 PATA support (Experimental)"
depends on AVR32 && PLATFORM_AT32AP && EXPERIMENTAL
help
This option enables support for the IDE devices on the
Atmel AT32AP platform.
If unsure, say N.
config PATA_ATIIXP
tristate "ATI PATA support (Experimental)"
depends on PCI && EXPERIMENTAL