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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>
This commit is contained in:
Kyungmin Park 2006-06-26 16:16:14 -07:00 committed by Tony Lindgren
parent e32f7ec2e8
commit 6dc3c8f201
2 changed files with 39 additions and 6 deletions
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41
arch/arm/plat-omap/dma.c
View File

@ -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)

4
include/asm-arm/arch-omap/dma.h
View File

@ -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 {