LXR linux/arch/cris/include/arch-v10/arch/dma.h

   1/* Defines for using and allocating dma channels. */
   2
   3#ifndef _ASM_ARCH_DMA_H
   4#define _ASM_ARCH_DMA_H
   5
   6#define MAX_DMA_CHANNELS        10
   7
   8/* dma0 and dma1 used for network (ethernet) */
   9#define NETWORK_TX_DMA_NBR 0
  10#define NETWORK_RX_DMA_NBR 1
  11
  12/* dma2 and dma3 shared by par0, scsi0, ser2 and ata */
  13#define PAR0_TX_DMA_NBR 2
  14#define PAR0_RX_DMA_NBR 3
  15#define SCSI0_TX_DMA_NBR 2
  16#define SCSI0_RX_DMA_NBR 3
  17#define SER2_TX_DMA_NBR 2
  18#define SER2_RX_DMA_NBR 3
  19#define ATA_TX_DMA_NBR 2
  20#define ATA_RX_DMA_NBR 3
  21
  22/* dma4 and dma5 shared by par1, scsi1, ser3 and extdma0 */
  23#define PAR1_TX_DMA_NBR 4
  24#define PAR1_RX_DMA_NBR 5
  25#define SCSI1_TX_DMA_NBR 4
  26#define SCSI1_RX_DMA_NBR 5
  27#define SER3_TX_DMA_NBR 4
  28#define SER3_RX_DMA_NBR 5
  29#define EXTDMA0_TX_DMA_NBR 4
  30#define EXTDMA0_RX_DMA_NBR 5
  31
  32/* dma6 and dma7 shared by ser0, extdma1 and mem2mem */
  33#define SER0_TX_DMA_NBR 6
  34#define SER0_RX_DMA_NBR 7
  35#define EXTDMA1_TX_DMA_NBR 6
  36#define EXTDMA1_RX_DMA_NBR 7
  37#define MEM2MEM_TX_DMA_NBR 6
  38#define MEM2MEM_RX_DMA_NBR 7
  39
  40/* dma8 and dma9 shared by ser1 and usb */
  41#define SER1_TX_DMA_NBR 8
  42#define SER1_RX_DMA_NBR 9
  43#define USB_TX_DMA_NBR 8
  44#define USB_RX_DMA_NBR 9
  45
  46#endif
  47
  48enum dma_owner
  49{
  50  dma_eth,
  51  dma_ser0,
  52  dma_ser1, /* Async and sync */
  53  dma_ser2,
  54  dma_ser3, /* Async and sync */
  55  dma_ata,
  56  dma_par0,
  57  dma_par1,
  58  dma_ext0,
  59  dma_ext1,
  60  dma_int6,
  61  dma_int7,
  62  dma_usb,
  63  dma_scsi0,
  64  dma_scsi1
  65};
  66
  67/* Masks used by cris_request_dma options: */
  68#define DMA_VERBOSE_ON_ERROR    (1<<0)
  69#define DMA_PANIC_ON_ERROR     ((1<<1)|DMA_VERBOSE_ON_ERROR)
  70
  71int cris_request_dma(unsigned int dmanr, const char * device_id,
  72                     unsigned options, enum dma_owner owner);
  73
  74void cris_free_dma(unsigned int dmanr, const char * device_id);
  75