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mcfdma.h
/* SPDX-License-Identifier: GPL-2.0 */ /****************************************************************************/ /* * mcfdma.h -- Coldfire internal DMA support defines. * * (C) Copyright 1999, Rob Scott (rscott@mtrob.ml.org) */ /****************************************************************************/ #ifndef mcfdma_h #define mcfdma_h /****************************************************************************/ #if !defined(CONFIG_M5272) /* * Define the DMA register set addresses. * Note: these are longword registers, use unsigned long as data type */ #define MCFDMA_SAR 0x00 /* DMA source address (r/w) */ #define MCFDMA_DAR 0x01 /* DMA destination adr (r/w) */ /* these are word registers, use unsigned short data type */ #define MCFDMA_DCR 0x04 /* DMA control reg (r/w) */ #define MCFDMA_BCR 0x06 /* DMA byte count reg (r/w) */ /* these are byte registers, use unsiged char data type */ #define MCFDMA_DSR 0x10 /* DMA status reg (r/w) */ #define MCFDMA_DIVR 0x14 /* DMA interrupt vec (r/w) */ /* * Bit definitions for the DMA Control Register (DCR). */ #define MCFDMA_DCR_INT 0x8000 /* Enable completion irq */ #define MCFDMA_DCR_EEXT 0x4000 /* Enable external DMA req */ #define MCFDMA_DCR_CS 0x2000 /* Enable cycle steal */ #define MCFDMA_DCR_AA 0x1000 /* Enable auto alignment */ #define MCFDMA_DCR_BWC_MASK 0x0E00 /* Bandwidth ctl mask */ #define MCFDMA_DCR_BWC_512 0x0200 /* Bandwidth: 512 Bytes */ #define MCFDMA_DCR_BWC_1024 0x0400 /* Bandwidth: 1024 Bytes */ #define MCFDMA_DCR_BWC_2048 0x0600 /* Bandwidth: 2048 Bytes */ #define MCFDMA_DCR_BWC_4096 0x0800 /* Bandwidth: 4096 Bytes */ #define MCFDMA_DCR_BWC_8192 0x0a00 /* Bandwidth: 8192 Bytes */ #define MCFDMA_DCR_BWC_16384 0x0c00 /* Bandwidth: 16384 Bytes */ #define MCFDMA_DCR_BWC_32768 0x0e00 /* Bandwidth: 32768 Bytes */ #define MCFDMA_DCR_SAA 0x0100 /* Single Address Access */ #define MCFDMA_DCR_S_RW 0x0080 /* SAA read/write value */ #define MCFDMA_DCR_SINC 0x0040 /* Source addr inc enable */ #define MCFDMA_DCR_SSIZE_MASK 0x0030 /* Src xfer size */ #define MCFDMA_DCR_SSIZE_LONG 0x0000 /* Src xfer size, 00 = longw */ #define MCFDMA_DCR_SSIZE_BYTE 0x0010 /* Src xfer size, 01 = byte */ #define MCFDMA_DCR_SSIZE_WORD 0x0020 /* Src xfer size, 10 = word */ #define MCFDMA_DCR_SSIZE_LINE 0x0030 /* Src xfer size, 11 = line */ #define MCFDMA_DCR_DINC 0x0008 /* Dest addr inc enable */ #define MCFDMA_DCR_DSIZE_MASK 0x0006 /* Dest xfer size */ #define MCFDMA_DCR_DSIZE_LONG 0x0000 /* Dest xfer size, 00 = long */ #define MCFDMA_DCR_DSIZE_BYTE 0x0002 /* Dest xfer size, 01 = byte */ #define MCFDMA_DCR_DSIZE_WORD 0x0004 /* Dest xfer size, 10 = word */ #define MCFDMA_DCR_DSIZE_LINE 0x0006 /* Dest xfer size, 11 = line */ #define MCFDMA_DCR_START 0x0001 /* Start transfer */ /* * Bit definitions for the DMA Status Register (DSR). */ #define MCFDMA_DSR_CE 0x40 /* Config error */ #define MCFDMA_DSR_BES 0x20 /* Bus Error on source */ #define MCFDMA_DSR_BED 0x10 /* Bus Error on dest */ #define MCFDMA_DSR_REQ 0x04 /* Requests remaining */ #define MCFDMA_DSR_BSY 0x02 /* Busy */ #define MCFDMA_DSR_DONE 0x01 /* DMA transfer complete */ #else /* This is an MCF5272 */ #define MCFDMA_DMR 0x00 /* Mode Register (r/w) */ #define MCFDMA_DIR 0x03 /* Interrupt trigger register (r/w) */ #define MCFDMA_DSAR 0x03 /* Source Address register (r/w) */ #define MCFDMA_DDAR 0x04 /* Destination Address register (r/w) */ #define MCFDMA_DBCR 0x02 /* Byte Count Register (r/w) */ /* Bit definitions for the DMA Mode Register (DMR) */ #define MCFDMA_DMR_RESET 0x80000000L /* Reset bit */ #define MCFDMA_DMR_EN 0x40000000L /* DMA enable */ #define MCFDMA_DMR_RQM 0x000C0000L /* Request Mode Mask */ #define MCFDMA_DMR_RQM_DUAL 0x000C0000L /* Dual address mode, the only valid mode */ #define MCFDMA_DMR_DSTM 0x00002000L /* Destination addressing mask */ #define MCFDMA_DMR_DSTM_SA 0x00000000L /* Destination uses static addressing */ #define MCFDMA_DMR_DSTM_IA 0x00002000L /* Destination uses incremental addressing */ #define MCFDMA_DMR_DSTT_UD 0x00000400L /* Destination is user data */ #define MCFDMA_DMR_DSTT_UC 0x00000800L /* Destination is user code */ #define MCFDMA_DMR_DSTT_SD 0x00001400L /* Destination is supervisor data */ #define MCFDMA_DMR_DSTT_SC 0x00001800L /* Destination is supervisor code */ #define MCFDMA_DMR_DSTS_OFF 0x8 /* offset to the destination size bits */ #define MCFDMA_DMR_DSTS_LONG 0x00000000L /* Long destination size */ #define MCFDMA_DMR_DSTS_BYTE 0x00000100L /* Byte destination size */ #define MCFDMA_DMR_DSTS_WORD 0x00000200L /* Word destination size */ #define MCFDMA_DMR_DSTS_LINE 0x00000300L /* Line destination size */ #define MCFDMA_DMR_SRCM 0x00000020L /* Source addressing mask */ #define MCFDMA_DMR_SRCM_SA 0x00000000L /* Source uses static addressing */ #define MCFDMA_DMR_SRCM_IA 0x00000020L /* Source uses incremental addressing */ #define MCFDMA_DMR_SRCT_UD 0x00000004L /* Source is user data */ #define MCFDMA_DMR_SRCT_UC 0x00000008L /* Source is user code */ #define MCFDMA_DMR_SRCT_SD 0x00000014L /* Source is supervisor data */ #define MCFDMA_DMR_SRCT_SC 0x00000018L /* Source is supervisor code */ #define MCFDMA_DMR_SRCS_OFF 0x0 /* Offset to the source size bits */ #define MCFDMA_DMR_SRCS_LONG 0x00000000L /* Long source size */ #define MCFDMA_DMR_SRCS_BYTE 0x00000001L /* Byte source size */ #define MCFDMA_DMR_SRCS_WORD 0x00000002L /* Word source size */ #define MCFDMA_DMR_SRCS_LINE 0x00000003L /* Line source size */ /* Bit definitions for the DMA interrupt register (DIR) */ #define MCFDMA_DIR_INVEN 0x1000 /* Invalid Combination interrupt enable */ #define MCFDMA_DIR_ASCEN 0x0800 /* Address Sequence Complete (Completion) interrupt enable */ #define MCFDMA_DIR_TEEN 0x0200 /* Transfer Error interrupt enable */ #define MCFDMA_DIR_TCEN 0x0100 /* Transfer Complete (a bus transfer, that is) interrupt enable */ #define MCFDMA_DIR_INV 0x0010 /* Invalid Combination */ #define MCFDMA_DIR_ASC 0x0008 /* Address Sequence Complete (DMA Completion) */ #define MCFDMA_DIR_TE 0x0002 /* Transfer Error */ #define MCFDMA_DIR_TC 0x0001 /* Transfer Complete */ #endif /* !defined(CONFIG_M5272) */ /****************************************************************************/ #endif /* mcfdma_h */
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