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>

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index aa1cf79..8e7c336 100644 (file)
--- 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 ca12023..e081400 100644 (file)
--- 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 {