| /* $Id: dma.h,v 1.2 2001/05/09 12:17:42 johana Exp $ |
| * linux/include/asm/dma.h: Defines for using and allocating dma channels. |
| */ |
| |
| #ifndef _ASM_DMA_H |
| #define _ASM_DMA_H |
| |
| /* it's useless on the Etrax, but unfortunately needed by the new |
| bootmem allocator (but this should do it for this) */ |
| |
| #define MAX_DMA_ADDRESS PAGE_OFFSET |
| |
| /* TODO: check nbr of channels on Etrax-100LX */ |
| |
| #define MAX_DMA_CHANNELS 10 |
| |
| /* dma0 and dma1 used for network (ethernet) */ |
| #define NETWORK_TX_DMA_NBR 0 |
| #define NETWORK_RX_DMA_NBR 1 |
| |
| /* dma2 and dma3 shared by par0, scsi0, ser2 and ata */ |
| #define PAR0_TX_DMA_NBR 2 |
| #define PAR0_RX_DMA_NBR 3 |
| #define SCSI0_TX_DMA_NBR 2 |
| #define SCSI0_RX_DMA_NBR 3 |
| #define SER2_TX_DMA_NBR 2 |
| #define SER2_RX_DMA_NBR 3 |
| #define ATA_TX_DMA_NBR 2 |
| #define ATA_RX_DMA_NBR 3 |
| |
| /* dma4 and dma5 shared by par1, scsi1, ser3 and extdma0 */ |
| #define PAR1_TX_DMA_NBR 4 |
| #define PAR1_RX_DMA_NBR 5 |
| #define SCSI1_TX_DMA_NBR 4 |
| #define SCSI1_RX_DMA_NBR 5 |
| #define SER3_TX_DMA_NBR 4 |
| #define SER3_RX_DMA_NBR 5 |
| #define EXTDMA0_TX_DMA_NBR 4 |
| #define EXTDMA0_RX_DMA_NBR 5 |
| |
| /* dma6 and dma7 shared by ser0, extdma1 and mem2mem */ |
| #define SER0_TX_DMA_NBR 6 |
| #define SER0_RX_DMA_NBR 7 |
| #define EXTDMA1_TX_DMA_NBR 6 |
| #define EXTDMA1_RX_DMA_NBR 7 |
| #define MEM2MEM_TX_DMA_NBR 6 |
| #define MEM2MEM_RX_DMA_NBR 7 |
| |
| /* dma8 and dma9 shared by ser1 and usb */ |
| #define SER1_TX_DMA_NBR 8 |
| #define SER1_RX_DMA_NBR 9 |
| #define USB_TX_DMA_NBR 8 |
| #define USB_RX_DMA_NBR 9 |
| |
| /* These are in kernel/dma.c: */ |
| extern int request_dma(unsigned int dmanr, const char * device_id); /* reserve a DMA channel */ |
| extern void free_dma(unsigned int dmanr); /* release it */ |
| |
| #endif /* _ASM_DMA_H */ |