xref: /linux/arch/m68k/include/asm/mcfdma.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /****************************************************************************/
3 
4 /*
5  *	mcfdma.h -- Coldfire internal DMA support defines.
6  *
7  *	(C) Copyright 1999, Rob Scott (rscott@mtrob.ml.org)
8  */
9 
10 /****************************************************************************/
11 #ifndef	mcfdma_h
12 #define	mcfdma_h
13 /****************************************************************************/
14 
15 #if !defined(CONFIG_M5272)
16 
17 /*
18  *	Define the DMA register set addresses.
19  *      Note: these are longword registers, use unsigned long as data type
20  */
21 #define	MCFDMA_SAR		0x00		/* DMA source address (r/w) */
22 #define	MCFDMA_DAR		0x01		/* DMA destination adr (r/w) */
23 /* these are word registers, use unsigned short data type */
24 #define	MCFDMA_DCR		0x04		/* DMA control reg (r/w) */
25 #define	MCFDMA_BCR		0x06		/* DMA byte count reg (r/w) */
26 /* these are byte registers, use unsiged char data type */
27 #define	MCFDMA_DSR		0x10		/* DMA status reg (r/w) */
28 #define	MCFDMA_DIVR		0x14		/* DMA interrupt vec (r/w) */
29 
30 /*
31  *	Bit definitions for the DMA Control Register (DCR).
32  */
33 #define	MCFDMA_DCR_INT	        0x8000		/* Enable completion irq */
34 #define	MCFDMA_DCR_EEXT	        0x4000		/* Enable external DMA req */
35 #define	MCFDMA_DCR_CS 	        0x2000		/* Enable cycle steal */
36 #define	MCFDMA_DCR_AA   	0x1000		/* Enable auto alignment */
37 #define	MCFDMA_DCR_BWC_MASK  	0x0E00		/* Bandwidth ctl mask */
38 #define MCFDMA_DCR_BWC_512      0x0200          /* Bandwidth:   512 Bytes */
39 #define MCFDMA_DCR_BWC_1024     0x0400          /* Bandwidth:  1024 Bytes */
40 #define MCFDMA_DCR_BWC_2048     0x0600          /* Bandwidth:  2048 Bytes */
41 #define MCFDMA_DCR_BWC_4096     0x0800          /* Bandwidth:  4096 Bytes */
42 #define MCFDMA_DCR_BWC_8192     0x0a00          /* Bandwidth:  8192 Bytes */
43 #define MCFDMA_DCR_BWC_16384    0x0c00          /* Bandwidth: 16384 Bytes */
44 #define MCFDMA_DCR_BWC_32768    0x0e00          /* Bandwidth: 32768 Bytes */
45 #define	MCFDMA_DCR_SAA         	0x0100		/* Single Address Access */
46 #define	MCFDMA_DCR_S_RW        	0x0080		/* SAA read/write value */
47 #define	MCFDMA_DCR_SINC        	0x0040		/* Source addr inc enable */
48 #define	MCFDMA_DCR_SSIZE_MASK  	0x0030		/* Src xfer size */
49 #define	MCFDMA_DCR_SSIZE_LONG  	0x0000		/* Src xfer size, 00 = longw */
50 #define	MCFDMA_DCR_SSIZE_BYTE  	0x0010		/* Src xfer size, 01 = byte */
51 #define	MCFDMA_DCR_SSIZE_WORD  	0x0020		/* Src xfer size, 10 = word */
52 #define	MCFDMA_DCR_SSIZE_LINE  	0x0030		/* Src xfer size, 11 = line */
53 #define	MCFDMA_DCR_DINC        	0x0008		/* Dest addr inc enable */
54 #define	MCFDMA_DCR_DSIZE_MASK  	0x0006		/* Dest xfer size */
55 #define	MCFDMA_DCR_DSIZE_LONG  	0x0000		/* Dest xfer size, 00 = long */
56 #define	MCFDMA_DCR_DSIZE_BYTE  	0x0002		/* Dest xfer size, 01 = byte */
57 #define	MCFDMA_DCR_DSIZE_WORD  	0x0004		/* Dest xfer size, 10 = word */
58 #define	MCFDMA_DCR_DSIZE_LINE  	0x0006		/* Dest xfer size, 11 = line */
59 #define	MCFDMA_DCR_START       	0x0001		/* Start transfer */
60 
61 /*
62  *	Bit definitions for the DMA Status Register (DSR).
63  */
64 #define	MCFDMA_DSR_CE	        0x40		/* Config error */
65 #define	MCFDMA_DSR_BES	        0x20		/* Bus Error on source */
66 #define	MCFDMA_DSR_BED 	        0x10		/* Bus Error on dest */
67 #define	MCFDMA_DSR_REQ   	0x04		/* Requests remaining */
68 #define	MCFDMA_DSR_BSY  	0x02		/* Busy */
69 #define	MCFDMA_DSR_DONE        	0x01		/* DMA transfer complete */
70 
71 #else /* This is an MCF5272 */
72 
73 #define MCFDMA_DMR        0x00    /* Mode Register (r/w) */
74 #define MCFDMA_DIR        0x03    /* Interrupt trigger register (r/w) */
75 #define MCFDMA_DSAR       0x03    /* Source Address register (r/w) */
76 #define MCFDMA_DDAR       0x04    /* Destination Address register (r/w) */
77 #define MCFDMA_DBCR       0x02    /* Byte Count Register (r/w) */
78 
79 /* Bit definitions for the DMA Mode Register (DMR) */
80 #define MCFDMA_DMR_RESET     0x80000000L /* Reset bit */
81 #define MCFDMA_DMR_EN        0x40000000L /* DMA enable */
82 #define MCFDMA_DMR_RQM       0x000C0000L /* Request Mode Mask */
83 #define MCFDMA_DMR_RQM_DUAL  0x000C0000L /* Dual address mode, the only valid mode */
84 #define MCFDMA_DMR_DSTM      0x00002000L /* Destination addressing mask */
85 #define MCFDMA_DMR_DSTM_SA   0x00000000L /* Destination uses static addressing */
86 #define MCFDMA_DMR_DSTM_IA   0x00002000L /* Destination uses incremental addressing */
87 #define MCFDMA_DMR_DSTT_UD   0x00000400L /* Destination is user data */
88 #define MCFDMA_DMR_DSTT_UC   0x00000800L /* Destination is user code */
89 #define MCFDMA_DMR_DSTT_SD   0x00001400L /* Destination is supervisor data */
90 #define MCFDMA_DMR_DSTT_SC   0x00001800L /* Destination is supervisor code */
91 #define MCFDMA_DMR_DSTS_OFF  0x8         /* offset to the destination size bits */
92 #define MCFDMA_DMR_DSTS_LONG 0x00000000L /* Long destination size */
93 #define MCFDMA_DMR_DSTS_BYTE 0x00000100L /* Byte destination size */
94 #define MCFDMA_DMR_DSTS_WORD 0x00000200L /* Word destination size */
95 #define MCFDMA_DMR_DSTS_LINE 0x00000300L /* Line destination size */
96 #define MCFDMA_DMR_SRCM      0x00000020L /* Source addressing mask */
97 #define MCFDMA_DMR_SRCM_SA   0x00000000L /* Source uses static addressing */
98 #define MCFDMA_DMR_SRCM_IA   0x00000020L /* Source uses incremental addressing */
99 #define MCFDMA_DMR_SRCT_UD   0x00000004L /* Source is user data */
100 #define MCFDMA_DMR_SRCT_UC   0x00000008L /* Source is user code */
101 #define MCFDMA_DMR_SRCT_SD   0x00000014L /* Source is supervisor data */
102 #define MCFDMA_DMR_SRCT_SC   0x00000018L /* Source is supervisor code */
103 #define MCFDMA_DMR_SRCS_OFF  0x0         /* Offset to the source size bits */
104 #define MCFDMA_DMR_SRCS_LONG 0x00000000L /* Long source size */
105 #define MCFDMA_DMR_SRCS_BYTE 0x00000001L /* Byte source size */
106 #define MCFDMA_DMR_SRCS_WORD 0x00000002L /* Word source size */
107 #define MCFDMA_DMR_SRCS_LINE 0x00000003L /* Line source size */
108 
109 /* Bit definitions for the DMA interrupt register (DIR) */
110 #define MCFDMA_DIR_INVEN     0x1000 /* Invalid Combination interrupt enable */
111 #define MCFDMA_DIR_ASCEN     0x0800 /* Address Sequence Complete (Completion) interrupt enable */
112 #define MCFDMA_DIR_TEEN      0x0200 /* Transfer Error interrupt enable */
113 #define MCFDMA_DIR_TCEN      0x0100 /* Transfer Complete (a bus transfer, that is) interrupt enable */
114 #define MCFDMA_DIR_INV       0x0010 /* Invalid Combination */
115 #define MCFDMA_DIR_ASC       0x0008 /* Address Sequence Complete (DMA Completion) */
116 #define MCFDMA_DIR_TE        0x0002 /* Transfer Error */
117 #define MCFDMA_DIR_TC        0x0001 /* Transfer Complete */
118 
119 #endif /* !defined(CONFIG_M5272) */
120 
121 /****************************************************************************/
122 #endif	/* mcfdma_h */
123