[ARM] S3C64XX: DMA support

Add support for the DMA blocks in the S3C64XX series of CPUS,
which are based on the ARM PL080 PrimeCell system.

Unfortunately, these DMA controllers diverge from the PL080
design by adding another DMA controller register and
configuration for OneNAND.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 58 insertions, 1 deletions

diff --git a/arch/arm/mach-s3c6400/include/mach/dma.h b/arch/arm/mach-s3c6400/include/mach/dma.h
index 9771ac2cb07e..1067619f0ba0 100644
--- a/arch/arm/mach-s3c6400/include/mach/dma.h
+++ b/arch/arm/mach-s3c6400/include/mach/dma.h
@@ -11,6 +11,63 @@
 #ifndef __ASM_ARCH_DMA_H
 #define __ASM_ARCH_DMA_H __FILE__
 
-/* currently nothing here, placeholder */
+#define S3C_DMA_CHANNELS        (16)
+
+/* see mach-s3c2410/dma.h for notes on dma channel numbers */
+
+/* Note, for the S3C64XX architecture we keep the DMACH_
+ * defines in the order they are allocated to [S]DMA0/[S]DMA1
+ * so that is easy to do DHACH_ -> DMA controller conversion
+ */
+enum dma_ch {
+        /* DMA0/SDMA0 */
+        DMACH_UART0 = 0,
+        DMACH_UART0_SRC2,
+        DMACH_UART1,
+        DMACH_UART1_SRC2,
+        DMACH_UART2,
+        DMACH_UART2_SRC2,
+        DMACH_UART3,
+        DMACH_UART3_SRC2,
+        DMACH_PCM0_TX,
+        DMACH_PCM0_RX,
+        DMACH_I2S0_OUT,
+        DMACH_I2S0_IN,
+        DMACH_SPI0_TX,
+        DMACH_SPI0_RX,
+        DMACH_HSI_I2SV40_TX,
+        DMACH_HSI_I2SV40_RX,
+
+        /* DMA1/SDMA1 */
+        DMACH_PCM1_TX = 16,
+        DMACH_PCM1_RX,
+        DMACH_I2S1_OUT,
+        DMACH_I2S1_IN,
+        DMACH_SPI1_TX,
+        DMACH_SPI1_RX,
+        DMACH_AC97_PCMOUT,
+        DMACH_AC97_PCMIN,
+        DMACH_AC97_MICIN,
+        DMACH_PWM,
+        DMACH_IRDA,
+        DMACH_EXTERNAL,
+        DMACH_RES1,
+        DMACH_RES2,
+        DMACH_SECURITY_RX,      /* SDMA1 only */
+        DMACH_SECURITY_TX,      /* SDMA1 only */
+        DMACH_MAX               /* the end */
+};
+
+static __inline__ int s3c_dma_has_circular(void)
+{
+        /* we will be supporting ciruclar buffers as soon as we have DMA
+         * engine support.
+         */
+        return 1;
+}
+
+#define S3C2410_DMAF_CIRCULAR           (1 << 0)
+
+#include <plat/dma.h>
 
 #endif /* __ASM_ARCH_IRQ_H */