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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Defines for using and allocating dma channels. */
   3
   4 #ifndef _ASM_ARCH_DMA_H
   5 #define _ASM_ARCH_DMA_H
   6
   7 #define MAX_DMA_CHANNELS        10
   8
   9 /* dma0 and dma1 used for network (ethernet) */
  10 #define NETWORK_TX_DMA_NBR 0
  11 #define NETWORK_RX_DMA_NBR 1
  12
  13 /* dma2 and dma3 shared by par0, scsi0, ser2 and ata */
  14 #define PAR0_TX_DMA_NBR 2
  15 #define PAR0_RX_DMA_NBR 3
  16 #define SCSI0_TX_DMA_NBR 2
  17 #define SCSI0_RX_DMA_NBR 3
  18 #define SER2_TX_DMA_NBR 2
  19 #define SER2_RX_DMA_NBR 3
  20 #define ATA_TX_DMA_NBR 2
  21 #define ATA_RX_DMA_NBR 3
  22
  23 /* dma4 and dma5 shared by par1, scsi1, ser3 and extdma0 */
  24 #define PAR1_TX_DMA_NBR 4
  25 #define PAR1_RX_DMA_NBR 5
  26 #define SCSI1_TX_DMA_NBR 4
  27 #define SCSI1_RX_DMA_NBR 5
  28 #define SER3_TX_DMA_NBR 4
  29 #define SER3_RX_DMA_NBR 5
  30 #define EXTDMA0_TX_DMA_NBR 4
  31 #define EXTDMA0_RX_DMA_NBR 5
  32
  33 /* dma6 and dma7 shared by ser0, extdma1 and mem2mem */
  34 #define SER0_TX_DMA_NBR 6
  35 #define SER0_RX_DMA_NBR 7
  36 #define EXTDMA1_TX_DMA_NBR 6
  37 #define EXTDMA1_RX_DMA_NBR 7
  38 #define MEM2MEM_TX_DMA_NBR 6
  39 #define MEM2MEM_RX_DMA_NBR 7
  40
  41 /* dma8 and dma9 shared by ser1 and usb */
  42 #define SER1_TX_DMA_NBR 8
  43 #define SER1_RX_DMA_NBR 9
  44 #define USB_TX_DMA_NBR 8
  45 #define USB_RX_DMA_NBR 9
  46
  47 #endif
  48
  49 enum dma_owner
  50 {
  51   dma_eth,
  52   dma_ser0,
  53   dma_ser1, /* Async and sync */
  54   dma_ser2,
  55   dma_ser3, /* Async and sync */
  56   dma_ata,
  57   dma_par0,
  58   dma_par1,
  59   dma_ext0,
  60   dma_ext1,
  61   dma_int6,
  62   dma_int7,
  63   dma_usb,
  64   dma_scsi0,
  65   dma_scsi1
  66 };
  67
  68 /* Masks used by cris_request_dma options: */
  69 #define DMA_VERBOSE_ON_ERROR    (1<<0)
  70 #define DMA_PANIC_ON_ERROR     ((1<<1)|DMA_VERBOSE_ON_ERROR)
  71
  72 int cris_request_dma(unsigned int dmanr, const char * device_id,
  73                      unsigned options, enum dma_owner owner);
  74
  75 void cris_free_dma(unsigned int dmanr, const char * device_id);