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author | Sudhakar Rajashekhara <sudhakar.raj@ti.com> | 2009-05-21 07:41:35 -0400 |
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committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-08-26 10:56:56 +0300 |
commit | 60902a2cb12c3c1682ee7a04ad7448ec16dc0c29 (patch) | |
tree | ba754bff7fadd7106dc9f8549136a514177d0fd1 /arch/arm/mach-davinci/include/mach/edma.h | |
parent | 4c5adde7943b982d22a7bf711654fbb5cb810667 (diff) | |
download | op-kernel-dev-60902a2cb12c3c1682ee7a04ad7448ec16dc0c29.zip op-kernel-dev-60902a2cb12c3c1682ee7a04ad7448ec16dc0c29.tar.gz |
davinci: EDMA: multiple CCs, channel mapping and API changes
- restructure to support multiple channel controllers by using
additional struct resources for each CC
- interface changes visible to EDMA clients
Introduce macros to build IDs from controller and channel number,
and to extract them. Modify the edma_alloc_slot function to take an
extra argument for the controller.
Also update ASoC drivers to use API. ASoC changes
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
- Move queue related mappings to dm<soc>.c
EDMA in DM355 and DM644x has two transfer controllers while DM646x
has four transfer controllers. Moving the queue to tc mapping and
queue priority mapping to dm<soc>.c will be helpful to probe these
mappings from platform device so that the machine_is_* testing will
be avoided.
- add channel mapping logic
Channel mapping logic is introduced in dm646x EDMA. This implies
that there is no fixed association for a channel number to a
parameter entry number. In other words, using the DMA channel
mapping registers (DCHMAPn), a PaRAM entry can be mapped to any
channel. While in the case of dm644x and dm355 there is a fixed
mapping between the EDMA channel and Param entry number.
Signed-off-by: Naresh Medisetty <naresh@ti.com>
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Reviewed-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/include/mach/edma.h')
-rw-r--r-- | arch/arm/mach-davinci/include/mach/edma.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/mach-davinci/include/mach/edma.h b/arch/arm/mach-davinci/include/mach/edma.h index 24a3792..ba2ebdd 100644 --- a/arch/arm/mach-davinci/include/mach/edma.h +++ b/arch/arm/mach-davinci/include/mach/edma.h @@ -170,6 +170,10 @@ enum sync_dimension { ABSYNC = 1 }; +#define EDMA_CTLR_CHAN(ctlr, chan) (((ctlr) << 16) | (chan)) +#define EDMA_CTLR(i) ((i) >> 16) +#define EDMA_CHAN_SLOT(i) ((i) & 0xffff) + #define EDMA_CHANNEL_ANY -1 /* for edma_alloc_channel() */ #define EDMA_SLOT_ANY -1 /* for edma_alloc_slot() */ @@ -180,7 +184,7 @@ int edma_alloc_channel(int channel, void edma_free_channel(unsigned channel); /* alloc/free parameter RAM slots */ -int edma_alloc_slot(int slot); +int edma_alloc_slot(unsigned ctlr, int slot); void edma_free_slot(unsigned slot); /* calls that operate on part of a parameter RAM slot */ @@ -216,9 +220,12 @@ struct edma_soc_info { unsigned n_region; unsigned n_slot; unsigned n_tc; + unsigned n_cc; /* list of channels with no even trigger; terminated by "-1" */ const s8 *noevent; + const s8 (*queue_tc_mapping)[2]; + const s8 (*queue_priority_mapping)[2]; }; #endif |