This patch enables MStandby smart-idle mode, autoidle smartidle mode,
and the autoidle bit for DMA4_OCP_SYSCONFIG.
Signed-off-by: NKalle Jokiniemi <ext-kalle.jokiniemi@nokia.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NKevin Hilman <khilman@ti.deeprootsystems.com>

This patch adds the support for OMAP4. The platform and machine specific
headers and sources updated for OMAP4430 SDP platform.

OMAP4430 is Texas Instrument's SOC based on ARM Cortex-A9 SMP architecture.
It's a dual core SOC with GIC used for interrupt handling and SCU for cache
coherency.
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Original OMAP DMA chaining design had chain_id as one of the callback
parameters. Patch 538528de changed it
to use logical channel instead.

Correct the naming for callback to also use logical channel number
instead of the chain_id.

More details are on this email thread:

http://marc.info/?l=linux-omap&m=122961071931459&w=2Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Implement transparent copy and constant fill features for OMAP2/3.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@nokia.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Fix the possible race condition in omap_free_dma(). Function omap_free_dma()
sets the dev_id = -1 and then accesses the channel afterwards to clear it.
But setting the dev_id=-1 makes the channel available for allocation again.
So it is possible someone else can grab it and results are unpredictable.
To avod this DMA channle is cleared first and then the dev_id = -1 is set.

Thanks to McNeil, Sean <sean.mcneil@ti.com> for ointing out this issue.
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This fixes the spurious interrupt issue on a DMA channel.

In OMAP sDMA, contrast to the SDMA.DMA4_CSRi registers, the
SDMA.DMA4_IRQSTATUS_Lj registers are updated regardless of
the corresponding bits in the SDMA.DMA4_IRQENABLE_Lj registers.
Since there are four sDMA interrupt lines and if more than one
line is actively used by two concurrently running sDMA softwares
modules,then the spurious interrupt can be observed on the other
lines.

Fix in this patch will only dispatch the relevant and enabled
interrupts on a particular line thus perevting spurious IRQ.
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: NNishant Kamat <nskamat@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This patch set up a cmdline option for omap dma for masking the
available channels. It is needed since the OMAP DMA is a system wide
resource and can be used by another software apart from the kernel.

To reserve the omap SDMA channels for kernel dma usage, use cmdline
bootarg "omap_dma_reserve_ch=". The valid range is 1 to 32.
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: NNishant Kamat <nskamat@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Changes to memory subsystem.
Signed-off-by: NZebediah C. McClure <zmc@lurian.net>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This has similar symptoms than 66c23551
where just omap_request_dma, omap_dma_link_lch and omap_dma_unlink_lch
can cause incorrect dump_stack(). Here it can happen if channel has been
used before and the channel flags variable holds old status.
Signed-off-by: NJarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

CSR must be cleared before invoking the callback.

If the callback function starts a new, fast DMA transfer on the same
channel, the completion status might lost if CSR is cleared after
the callback invocation.
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Bug in existing code causes synchro control to be set +32 if request
line greater than 63 is used.

Also clean up the function a bit by removing extra parens and
clearing the bits at before write.

Reported by Wenbiao Wang.
Signed-off-by: NAnand Gadiyar <gadiyar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

SDMA channel is not disabled after transaction error. So explicitly disable it.
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked By : Nishant kamat <nskamat@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

When ISA_DMA_API is unset, we're not implementing the ISA DMA API,
so there's no point in publishing the prototypes via asm/dma.h, nor
including the machine dependent parts of that API.

This allows us to remove a lot of mach/dma.h files which don't contain
any useful code.  Unfortunately though, some platforms put their own
private non-ISA definitions into mach/dma.h, so we leave these behind
and fix the appropriate #include statments.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

OMAP1_IO_ADDRESS(), OMAP2_IO_ADDRESS() and IO_ADDRESS() returns cookies
for use with __raw_{read|write}* for accessing registers.  Therefore,
these macros should return (void __iomem *) cookies, not integer values.

Doing this improves typechecking, and means we can find those places
where, eg, DMA controllers are incorrectly given virtual addresses to
DMA to, or physical addresses are thrown through a virtual to physical
address translation.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This just leaves include/asm-arm/plat-* to deal with.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Remove includes of asm/hardware.h in addition to asm/arch/hardware.h.
Then, since asm/hardware.h only exists to include asm/arch/hardware.h,
update everything to directly include asm/arch/hardware.h and remove
asm/hardware.h.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

DMA clean-up, mostly checkpatch.pl fixes.
Signed-off-by: NTony Lindgren <tony@atomide.com>

Remove __REG access in DMA code, use dma_read/write instead:

- dynamically set the omap_dma_base based on the omap type
- omap_read/write becomes dma_read/write
- dma channel registers are read with dma_ch_read/write

Cc: David Brownell <david-b@pacbell.net>
Cc: linux-usb@vger.kernel.org
Signed-off-by: NTony Lindgren <tony@atomide.com>

Make DMA channels dynamic for multi-boot
Signed-off-by: NTony Lindgren <tony@atomide.com>

Channel should be marked active only when DMA is really started. Otherwise
just omap_request_dma, omap_dma_link_lch and omap_dma_unlink_lch will cause
incorrect dump_stack().
Signed-off-by: NJarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Function enable_lnk does incorrect channel link on non-omap1 builds if chain
is created manually with omap_request_dma and omap_dma_link_lch functions.

Fix this by making sure that next_linked_ch field is initialized to -1 just
in omap_request_dma.
Signed-off-by: NJarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Fix CLINK mask, clear spurious interrupt.
Signed-off-by: NGadiyar, Anand <gadiyar@ti.com>
Signed-off-by: NKevin Hilman <khilman@mvista.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This patch changes the return value of omap_dma_chain_a_transfer
to 0 on success instead of the flag 'start_dma', which wasn't really useful
for anything.
Signed-off-by: NAnand Gadiyar <gadiyar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

__FUNCTION__ is gcc-specific, use __func__
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This makes parameter passing to DMA handlers uniform between non-chained
and chained transfers and makes debugging easier. Additional data like
chain_id can be always passed to handlers via callback data if needed.
Signed-off-by: NJarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Add DMA support for chaining and 3430.

Also remove old DEBUG_PRINTS as noted by Russell King.
Signed-off-by: NAnand Gadiyar <gadiyar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

* Convert files to UTF-8.

  * Also correct some people's names
    (one example is Eißfeldt, which was found in a source file.
    Given that the author used an ß at all in a source file
    indicates that the real name has in fact a 'ß' and not an 'ss',
    which is commonly used as a substitute for 'ß' when limited to
    7bit.)

  * Correct town names (Goettingen -> Göttingen)

  * Update Eberhard Mönkeberg's address (http://lkml.org/lkml/2007/1/8/313)
Signed-off-by: NJan Engelhardt <jengelh@gmx.de>
Signed-off-by: NAdrian Bunk <bunk@kernel.org>

The SoSSI driver should already take care of this by enabling / disabling
its clock when necessary, so this legacy callout from the PM idle code
is not needed any more.
Signed-off-by: NImre Deak <imre.deak@solidboot.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Spelling fixes in arch/arm/.
Signed-off-by: NSimon Arlott <simon@fire.lp0.eu>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Fix warning: 'offset' might be uninitialized
Signed-off-by: NTony Lindgren <tony@atomide.com>

Add DMA IRQ sanity checks
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The register bits are reset by writing one. Remove the unneeded reads and
fix writes to not clear too many bits.
Signed-off-by: NTimo Teras <timo.teras@solidboot.com>
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Untested, but this should fix up the bulk of the totally mechanical
issues, and should make the actual detail fixing easier.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch syncs OMAP DMA code with linux-omap tree.
Mostly allow changing DMA callback function and set
OMAP2 specific transfer mode.
Signed-off-by: NTony Lindgren <tony@atomide.com>

Also export some omap24xx specific DMA functions.
Signed-off-by: NTony Lindgren <tony@atomide.com>

We have to make sure that the LCD DMA external destination bit is
cleared by default, otherwise OMAP won't sleep.
Signed-off-by: NImre Deak <imre.deak@solidboot.com>
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

The irgflags consolidation did conflict with the ARM to generic IRQ
conversion and was not applied for ARM. Fix it up.

Use the new IRQF_ constants and remove the SA_INTERRUPT define
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Patch from Thomas Gleixner

From: Thomas Gleixner <tglx@linutronix.de>

Fixup the conversion to generic irq subsystem.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

- DMA CSR register is cleared by reading on omap1, but on
  omap2 it is cleard by writing to it.

- DMA TOUT interrupt does not exist on omap24xx, rename it

- Add SECURE and MISALIGNED errors by default for omap24xx

- Add defines for external DMA request lines
Signed-off-by: NTony Lindgren <tony@atomide.com>