1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Defines for using and allocating dma channels. */
4 #ifndef _ASM_ARCH_DMA_H
5 #define _ASM_ARCH_DMA_H
7 #define MAX_DMA_CHANNELS 10
9 /* dma0 and dma1 used for network (ethernet) */
10 #define NETWORK_TX_DMA_NBR 0
11 #define NETWORK_RX_DMA_NBR 1
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
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
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
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
53 dma_ser1, /* Async and sync */
55 dma_ser3, /* Async and sync */
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)
72 int cris_request_dma(unsigned int dmanr, const char * device_id,
73 unsigned options, enum dma_owner owner);
75 void cris_free_dma(unsigned int dmanr, const char * device_id);