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path: root/arch/blackfin/include/asm/dma.h
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2010-08-06Blackfin: fix DMA/cache bug when resuming from suspend to RAMMichael Hennerich
The dma_memcpy() function takes care of flushing different caches for us. Normally this is what we want, but when resuming from mem, we don't yet have caches enabled. If these functions happen to be placed into L1 mem (which is what we're trying to relocate), then things aren't going to work. So define a non-cache dma_memcpy() variant to utilize in situations like this. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: add dma_disable_irq_nosync() API for irq handlersBarry Song
Some IRQ handlers need to disable a DMA channel without waiting. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15Blackfin: dma-mapping.h: flesh out missing DMA mapping functionsBarry Song
Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15Blackfin: unify DMA masksMike Frysinger
Every Blackfin variant has the same DMA bit masks, so avoid duplicating them over and over in each mach header. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-12-15Blackfin: convert DMA mutex to an atomic and drop redundant codeMike Frysinger
The DMA channel status field was encoding redundant info wrt the DMA MMR config register, and it was doing an incomplete job of checking all DMA channels (some drivers write directly to the config register). So drop the tristate field in favor of a binary atomic field. This simplifies the code in general, removes the implicit need for sleeping, and forces the suspend code to handle all channels properly. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12Blackfin: add SSYNC to set_dma_sg() for descriptor fetchingSonic Zhang
Make sure the internal core buffers are flushed before telling the DMA engine to fetch the descriptor structure so that it gets the right values. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12Blackfin: fix early L1 relocation crashRobin Getz
Our early L1 relocate code may implicitly call code which lives in L1 memory. This is due to the dma_memcpy() rewrite that made the DMA code lockless and safe to be used by multiple processes. If we start the early DMA memcpy to relocate things into L1 instruction but then our DMA memcpy code calls a function that lives in L1, things fall apart. As such, create a small dedicated DMA memcpy routine that we can assume sanity at boot time. Reported-by: Filip Van Rillaer <filip.vanrillaer@oneaccess-net.com> Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-07Blackfin arch: add get_dma_config() func to match set_dma_config()Mike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: add volatile markings to DMA MMRsMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: remove unused members of dma_channel structMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: dma code: cannot simply OR the ndsizeMike Frysinger
cannot simply OR the ndsize ... need to clear out the old value first Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: desc_ptr is a pointer, so declare it as suchMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: move most dma functions into static inlinesMike Frysinger
move most dma functions into static inlines since they are vastly 1 liners that get/set a value in a structure Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: dma header file: strip down includes to only necessary onesMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: drop irq_callback from struct dma_channelMike Frysinger
the irq member already serves the same purpose Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: drop custom dma_interrupt_t and just use irq_handler_tMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: rewrite dma_memcpy() and dma in/out functionsMike Frysinger
- unify all dma in/out functions (takes ~35 lines of code now) - unify dma_memcpy with dma in/out functions (1 place that touches MDMA0 registers) - add support for 32bit transfers - cleanup dma_memcpy code to be much more readable - irqs are disabled only while programming MDMA registers rather than the entire transaction Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: cleanup - use scm for changelog, not file headersMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: rename MAX_BLACKFIN_DMA_CHANNEL to MAX_DMA_CHANNELS to match ↵Mike Frysinger
everyone else Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: add const to some function prototype and struct dma_channelMichael McTernan
Signed-off-by: Michael McTernan <mmcternan@airvana.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-28Blackfin arch: lookup channel2irq() only onceMichael Hennerich
Add irq to struct dma_channel lookup channel2irq() only once, since channel2irq() is fairly large on some Blackfin derivatives. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-08-27Blackfin arch: move include/asm-blackfin header files to arch/blackfinBryan Wu
Signed-off-by: Bryan Wu <cooloney@kernel.org>
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