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davinci: EDMA: multiple CCs, channel mapping and API changes

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- 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>
This commit is contained in:
Sudhakar Rajashekhara
2009-05-21 07:41:35 -04:00
committed by Kevin Hilman
parent 4c5adde794
commit 60902a2cb1
7 changed files with 638 additions and 324 deletions
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8
arch/arm/mach-davinci/devices.c
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@ -82,10 +82,10 @@ static struct resource mmcsd0_resources[] = {
},
/* DMA channels: RX, then TX */
{
.start = DAVINCI_DMA_MMCRXEVT,
.start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCRXEVT),
.flags = IORESOURCE_DMA,
}, {
.start = DAVINCI_DMA_MMCTXEVT,
.start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCTXEVT),
.flags = IORESOURCE_DMA,
},
};
@ -119,10 +119,10 @@ static struct resource mmcsd1_resources[] = {
},
/* DMA channels: RX, then TX */
{
.start = 30, /* rx */
.start = EDMA_CTLR_CHAN(0, 30), /* rx */
.flags = IORESOURCE_DMA,
}, {
.start = 31, /* tx */
.start = EDMA_CTLR_CHAN(0, 31), /* tx */
.flags = IORESOURCE_DMA,
},
};