ARM: OMAP: OMAP2 DMA burst support

OMAP2 DMA burst setting support

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

2 files changed, 39 insertions, 6 deletions

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index aa1cf79f9543..8e7c33656b52 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -292,22 +292,39 @@ void omap_set_dma_src_data_pack(int lch, int enable)
 
 void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
 {
+        unsigned int burst = 0;
         OMAP_DMA_CSDP_REG(lch) &= ~(0x03 << 7);
 
         switch (burst_mode) {
         case OMAP_DMA_DATA_BURST_DIS:
                 break;
         case OMAP_DMA_DATA_BURST_4:
-                OMAP_DMA_CSDP_REG(lch) |= (0x02 << 7);
+                if (cpu_is_omap24xx())
+                        burst = 0x1;
+                else
+                        burst = 0x2;
                 break;
         case OMAP_DMA_DATA_BURST_8:
-                /* not supported by current hardware
+                if (cpu_is_omap24xx()) {
+                        burst = 0x2;
+                        break;
+                }
+                /* not supported by current hardware on OMAP1
                  * w |= (0x03 << 7);
                  * fall through
                  */
+        case OMAP_DMA_DATA_BURST_16:
+                if (cpu_is_omap24xx()) {
+                        burst = 0x3;
+                        break;
+                }
+                /* OMAP1 don't support burst 16
+                 * fall through
+                 */
         default:
                 BUG();
         }
+        OMAP_DMA_CSDP_REG(lch) |= (burst << 7);
 }
 
 /* Note that dest_port is only for OMAP1 */
@@ -354,22 +371,38 @@ void omap_set_dma_dest_data_pack(int lch, int enable)
 
 void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
 {
+        unsigned int burst = 0;
         OMAP_DMA_CSDP_REG(lch) &= ~(0x03 << 14);
 
         switch (burst_mode) {
         case OMAP_DMA_DATA_BURST_DIS:
                 break;
         case OMAP_DMA_DATA_BURST_4:
-                OMAP_DMA_CSDP_REG(lch) |= (0x02 << 14);
+                if (cpu_is_omap24xx())
+                        burst = 0x1;
+                else
+                        burst = 0x2;
                 break;
         case OMAP_DMA_DATA_BURST_8:
-                OMAP_DMA_CSDP_REG(lch) |= (0x03 << 14);
+                if (cpu_is_omap24xx())
+                        burst = 0x2;
+                else
+                        burst = 0x3;
                 break;
+        case OMAP_DMA_DATA_BURST_16:
+                if (cpu_is_omap24xx()) {
+                        burst = 0x3;
+                        break;
+                }
+                /* OMAP1 don't support burst 16
+                 * fall through
+                 */
         default:
                 printk(KERN_ERR "Invalid DMA burst mode\n");
                 BUG();
                 return;
         }
+        OMAP_DMA_CSDP_REG(lch) |= (burst << 14);
 }
 
 static inline void omap_enable_channel_irq(int lch)
diff --git a/include/asm-arm/arch-omap/dma.h b/include/asm-arm/arch-omap/dma.h
index ca1202312a45..e081400b658e 100644
--- a/include/asm-arm/arch-omap/dma.h
+++ b/include/asm-arm/arch-omap/dma.h
@@ -315,11 +315,11 @@ enum {
         OMAP_LCD_DMA_B2_BOTTOM
 };
 
-/* REVISIT: Check if BURST_4 is really 1 (or 2) */
 enum omap_dma_burst_mode {
         OMAP_DMA_DATA_BURST_DIS = 0,
         OMAP_DMA_DATA_BURST_4,
-        OMAP_DMA_DATA_BURST_8
+        OMAP_DMA_DATA_BURST_8,
+        OMAP_DMA_DATA_BURST_16,
 };
 
 enum omap_dma_color_mode {