[ARM] 3444/1: i.MX: Scatter-gather DMA emulation for i.MX/MX1

Patch from Pavel Pisa

This patch contains simplified set of changes to add scatter-gather
emulation capability into MX1 DMA support. The result should
be still usable for next combination of DMA transfers
  Statter-Gather/linear/2D/FIFO to linear/2D/FIFO and
  linear/2D/FIFO to Statter-Gather/2D/FIFO
The patch corrects channel priority allocation to be compatible
with MX1 hardware implementation.
Previous code has not been adapted from its PXA original.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 3 insertions, 14 deletions

diff --git a/include/asm-arm/arch-imx/dma.h b/include/asm-arm/arch-imx/dma.h
index b45fa367d71e..621ff2c730f2 100644
--- a/include/asm-arm/arch-imx/dma.h
+++ b/include/asm-arm/arch-imx/dma.h
@@ -17,27 +17,16 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+
 #ifndef __ASM_ARCH_DMA_H
 #define __ASM_ARCH_DMA_H
 
-/*
- * DMA registration
- */
-
 typedef enum {
         DMA_PRIO_HIGH = 0,
-        DMA_PRIO_MEDIUM = 3,
-        DMA_PRIO_LOW = 6
+        DMA_PRIO_MEDIUM = 1,
+        DMA_PRIO_LOW = 2
 } imx_dma_prio;
 
-int imx_request_dma(char *name, imx_dma_prio prio,
-                    void (*irq_handler) (int, void *, struct pt_regs *),
-                    void (*err_handler) (int, void *, struct pt_regs *),
-                    void *data);
-
-void imx_free_dma(int dma_ch);
-
-
 #define DMA_REQ_UART3_T        2
 #define DMA_REQ_UART3_R        3
 #define DMA_REQ_SSI2_T         4