[ARM] 4780/1: S3C2412: Allow for seperate DMA channels for TX and RX

The current S3C24XX DMA code does not allow for an peripheral
that has one channel for RX and another for TX.

This patch adds a per-cpu dma operation to select the transmit
or receive channel, and adds support to the S3C2412 for the
seperate DMA channels for TX and RX.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/asm-arm/plat-s3c24xx/dma.h b/include/asm-arm/plat-s3c24xx/dma.h
index 2c59406435e5..c78efe316fc8 100644
--- a/include/asm-arm/plat-s3c24xx/dma.h
+++ b/include/asm-arm/plat-s3c24xx/dma.h
@@ -32,6 +32,7 @@ struct s3c24xx_dma_map {
         struct s3c24xx_dma_addr  hw_addr;
 
         unsigned long            channels[S3C2410_DMA_CHANNELS];
+        unsigned long            channels_rx[S3C2410_DMA_CHANNELS];
 };
 
 struct s3c24xx_dma_selection {
@@ -41,6 +42,10 @@ struct s3c24xx_dma_selection {
 
         void    (*select)(struct s3c2410_dma_chan *chan,
                           struct s3c24xx_dma_map *map);
+
+        void    (*direction)(struct s3c2410_dma_chan *chan,
+                             struct s3c24xx_dma_map *map,
+                             enum s3c2410_dmasrc dir);
 };
 
 extern int s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel);