sh: SH7760 DMABRG support.

The DMABRG is a special DMA unit within the SH7760 which does data
transfers from main memory to Audio units and USB shared memory.
It has 3 IRQ lines which generate 10 events, which have to be masked
unmasked and acked in a single 32bit register. It works independently
from the tradition SH DMAC, but blocks usage of DMAC channel 0.

This patch adds 2 functions to associate callbacks with DMABRG events
and initialization.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 14 insertions, 6 deletions

diff --git a/arch/sh/drivers/dma/Kconfig b/arch/sh/drivers/dma/Kconfig
index defc13c37d48..99935f9daf4b 100644
--- a/arch/sh/drivers/dma/Kconfig
+++ b/arch/sh/drivers/dma/Kconfig
@@ -1,12 +1,12 @@
 menu "DMA support"
 
-config SH_DMA
-        bool "DMA controller (DMAC) support"
-        help
-          Selecting this option will provide same API as PC's Direct Memory
-          Access Controller(8237A) for SuperH DMAC.
+config SH_DMA_API
+        bool
 
-          If unsure, say N.
+config SH_DMA
+        bool "SuperH on-chip DMA controller (DMAC) support"
+        select SH_DMA_API
+        default n
 
 config NR_ONCHIP_DMA_CHANNELS
         depends on SH_DMA
@@ -53,4 +53,12 @@ config DMA_PAGE_OPS_CHANNEL
           in case channel 3 is unavailable. On the SH4, channels 1,2, and 3
           are dual-address capable.
 
+config SH_DMABRG
+        bool "SH7760 DMABRG support"
+        depends on CPU_SUBTYPE_SH7760
+        help
+          The DMABRG does data transfers from main memory to Audio/USB units
+          of the SH7760.
+          Say Y if you want to use Audio/USB DMA on your SH7760 board.
+
 endmenu