#include <twl/mi.h>void MI_SetNDmaArbitrament( u32 mode, u32 cycle );
| mode | The arbitration method of new DMA. |
| cycle | The number of cycles (only valid when the arbitration method of the new DMA is round-robin). |
None.
Specifies the DMA arbitration method for the TWL's new DMA.
In mode, specify the arbitration method.
MI_NDMA_ARBITRAMENT_FIX |
Fixed method |
MI_NDMA_ARBITRAMENT_ROUND |
Round-robin method |
cycle is meaningful when the round-robin method is specified as the mode. When using the fixed method, it has no meaning regardless of the value.
MI_NDMA_RCYCLE_0 |
0 cycles |
MI_NDMA_RCYCLE_1 |
1 cycle |
MI_NDMA_RCYCLE_2 |
2 cycles |
MI_NDMA_RCYCLE_4 |
4 cycles |
MI_NDMA_RCYCLE_8 |
8 cycles |
MI_NDMA_RCYCLE_16 |
16 cycles |
MI_NDMA_RCYCLE_32 |
32 cycles |
MI_NDMA_RCYCLE_64 |
64 cycles |
MI_NDMA_RCYCLE_128 |
128 cycles |
MI_NDMA_RCYCLE_256 |
256 cycles |
MI_NDMA_RCYCLE_512 |
512 cycles |
MI_NDMA_RCYCLE_1024 |
1024 cycles |
MI_NDMA_RCYCLE_2048 |
2048 cycles |
MI_NDMA_RCYCLE_4096 |
4096 cycles |
MI_NDMA_RCYCLE_8192 |
8192 cycles |
MI_NDMA_RCYCLE_16384 |
16384 cycles |
cycle will be reflected in the actual setting at the point in time when there are no DMA startup requests for any of the DMA channels.
Example:
//---- Fixed method
MI_SetNDmaArbitrament(MI_NDMA_ARBITRAMENT_FIX, 0/*dummy*/);
//---- Round-robin method
MI_SetNDmaArbitrament(MI_NDMA_ARBITRAMENT_ROUND, MI_NDMA_RCYCLE_32);
Accesses the DMA_GCNT register.
MI_GetNDmaArbitrament, MI_GetNDmaArbitramentRoundRobinCycle
2007/09/07 Initial version.
CONFIDENTIAL