966cdb2fdf
Support the DMA unit of the ColdFire 523x processor family. Signed-off-by: Greg Ungerer <gerg@uclinux.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
146 lines
7.5 KiB
C
146 lines
7.5 KiB
C
/****************************************************************************/
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/*
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* mcfdma.h -- Coldfire internal DMA support defines.
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*
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* (C) Copyright 1999, Rob Scott (rscott@mtrob.ml.org)
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*/
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/****************************************************************************/
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#ifndef mcfdma_h
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#define mcfdma_h
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/****************************************************************************/
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#include <linux/config.h>
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/*
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* Get address specific defines for this Coldfire member.
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*/
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#if defined(CONFIG_M5206) || defined(CONFIG_M5206e)
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#define MCFDMA_BASE0 0x200 /* Base address of DMA 0 */
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#define MCFDMA_BASE1 0x240 /* Base address of DMA 1 */
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#elif defined(CONFIG_M5272)
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#define MCFDMA_BASE0 0x0e0 /* Base address of DMA 0 */
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#elif defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x)
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/* These are relative to the IPSBAR, not MBAR */
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#define MCFDMA_BASE0 0x100 /* Base address of DMA 0 */
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#define MCFDMA_BASE1 0x140 /* Base address of DMA 1 */
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#define MCFDMA_BASE2 0x180 /* Base address of DMA 2 */
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#define MCFDMA_BASE3 0x1C0 /* Base address of DMA 3 */
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#elif defined(CONFIG_M5249) || defined(CONFIG_M5307) || defined(CONFIG_M5407)
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#define MCFDMA_BASE0 0x300 /* Base address of DMA 0 */
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#define MCFDMA_BASE1 0x340 /* Base address of DMA 1 */
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#define MCFDMA_BASE2 0x380 /* Base address of DMA 2 */
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#define MCFDMA_BASE3 0x3C0 /* Base address of DMA 3 */
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#endif
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#if !defined(CONFIG_M5272)
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/*
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* Define the DMA register set addresses.
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* Note: these are longword registers, use unsigned long as data type
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*/
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#define MCFDMA_SAR 0x00 /* DMA source address (r/w) */
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#define MCFDMA_DAR 0x01 /* DMA destination adr (r/w) */
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/* these are word registers, use unsigned short data type */
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#define MCFDMA_DCR 0x04 /* DMA control reg (r/w) */
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#define MCFDMA_BCR 0x06 /* DMA byte count reg (r/w) */
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/* these are byte registers, use unsiged char data type */
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#define MCFDMA_DSR 0x10 /* DMA status reg (r/w) */
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#define MCFDMA_DIVR 0x14 /* DMA interrupt vec (r/w) */
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/*
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* Bit definitions for the DMA Control Register (DCR).
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*/
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#define MCFDMA_DCR_INT 0x8000 /* Enable completion irq */
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#define MCFDMA_DCR_EEXT 0x4000 /* Enable external DMA req */
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#define MCFDMA_DCR_CS 0x2000 /* Enable cycle steal */
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#define MCFDMA_DCR_AA 0x1000 /* Enable auto alignment */
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#define MCFDMA_DCR_BWC_MASK 0x0E00 /* Bandwidth ctl mask */
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#define MCFDMA_DCR_BWC_512 0x0200 /* Bandwidth: 512 Bytes */
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#define MCFDMA_DCR_BWC_1024 0x0400 /* Bandwidth: 1024 Bytes */
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#define MCFDMA_DCR_BWC_2048 0x0600 /* Bandwidth: 2048 Bytes */
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#define MCFDMA_DCR_BWC_4096 0x0800 /* Bandwidth: 4096 Bytes */
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#define MCFDMA_DCR_BWC_8192 0x0a00 /* Bandwidth: 8192 Bytes */
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#define MCFDMA_DCR_BWC_16384 0x0c00 /* Bandwidth: 16384 Bytes */
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#define MCFDMA_DCR_BWC_32768 0x0e00 /* Bandwidth: 32768 Bytes */
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#define MCFDMA_DCR_SAA 0x0100 /* Single Address Access */
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#define MCFDMA_DCR_S_RW 0x0080 /* SAA read/write value */
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#define MCFDMA_DCR_SINC 0x0040 /* Source addr inc enable */
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#define MCFDMA_DCR_SSIZE_MASK 0x0030 /* Src xfer size */
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#define MCFDMA_DCR_SSIZE_LONG 0x0000 /* Src xfer size, 00 = longw */
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#define MCFDMA_DCR_SSIZE_BYTE 0x0010 /* Src xfer size, 01 = byte */
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#define MCFDMA_DCR_SSIZE_WORD 0x0020 /* Src xfer size, 10 = word */
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#define MCFDMA_DCR_SSIZE_LINE 0x0030 /* Src xfer size, 11 = line */
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#define MCFDMA_DCR_DINC 0x0008 /* Dest addr inc enable */
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#define MCFDMA_DCR_DSIZE_MASK 0x0006 /* Dest xfer size */
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#define MCFDMA_DCR_DSIZE_LONG 0x0000 /* Dest xfer size, 00 = long */
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#define MCFDMA_DCR_DSIZE_BYTE 0x0002 /* Dest xfer size, 01 = byte */
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#define MCFDMA_DCR_DSIZE_WORD 0x0004 /* Dest xfer size, 10 = word */
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#define MCFDMA_DCR_DSIZE_LINE 0x0006 /* Dest xfer size, 11 = line */
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#define MCFDMA_DCR_START 0x0001 /* Start transfer */
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/*
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* Bit definitions for the DMA Status Register (DSR).
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*/
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#define MCFDMA_DSR_CE 0x40 /* Config error */
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#define MCFDMA_DSR_BES 0x20 /* Bus Error on source */
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#define MCFDMA_DSR_BED 0x10 /* Bus Error on dest */
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#define MCFDMA_DSR_REQ 0x04 /* Requests remaining */
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#define MCFDMA_DSR_BSY 0x02 /* Busy */
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#define MCFDMA_DSR_DONE 0x01 /* DMA transfer complete */
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#else /* This is an MCF5272 */
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#define MCFDMA_DMR 0x00 /* Mode Register (r/w) */
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#define MCFDMA_DIR 0x03 /* Interrupt trigger register (r/w) */
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#define MCFDMA_DSAR 0x03 /* Source Address register (r/w) */
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#define MCFDMA_DDAR 0x04 /* Destination Address register (r/w) */
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#define MCFDMA_DBCR 0x02 /* Byte Count Register (r/w) */
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/* Bit definitions for the DMA Mode Register (DMR) */
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#define MCFDMA_DMR_RESET 0x80000000L /* Reset bit */
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#define MCFDMA_DMR_EN 0x40000000L /* DMA enable */
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#define MCFDMA_DMR_RQM 0x000C0000L /* Request Mode Mask */
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#define MCFDMA_DMR_RQM_DUAL 0x000C0000L /* Dual address mode, the only valid mode */
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#define MCFDMA_DMR_DSTM 0x00002000L /* Destination addressing mask */
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#define MCFDMA_DMR_DSTM_SA 0x00000000L /* Destination uses static addressing */
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#define MCFDMA_DMR_DSTM_IA 0x00002000L /* Destination uses incremental addressing */
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#define MCFDMA_DMR_DSTT_UD 0x00000400L /* Destination is user data */
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#define MCFDMA_DMR_DSTT_UC 0x00000800L /* Destination is user code */
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#define MCFDMA_DMR_DSTT_SD 0x00001400L /* Destination is supervisor data */
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#define MCFDMA_DMR_DSTT_SC 0x00001800L /* Destination is supervisor code */
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#define MCFDMA_DMR_DSTS_OFF 0x8 /* offset to the destination size bits */
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#define MCFDMA_DMR_DSTS_LONG 0x00000000L /* Long destination size */
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#define MCFDMA_DMR_DSTS_BYTE 0x00000100L /* Byte destination size */
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#define MCFDMA_DMR_DSTS_WORD 0x00000200L /* Word destination size */
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#define MCFDMA_DMR_DSTS_LINE 0x00000300L /* Line destination size */
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#define MCFDMA_DMR_SRCM 0x00000020L /* Source addressing mask */
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#define MCFDMA_DMR_SRCM_SA 0x00000000L /* Source uses static addressing */
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#define MCFDMA_DMR_SRCM_IA 0x00000020L /* Source uses incremental addressing */
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#define MCFDMA_DMR_SRCT_UD 0x00000004L /* Source is user data */
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#define MCFDMA_DMR_SRCT_UC 0x00000008L /* Source is user code */
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#define MCFDMA_DMR_SRCT_SD 0x00000014L /* Source is supervisor data */
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#define MCFDMA_DMR_SRCT_SC 0x00000018L /* Source is supervisor code */
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#define MCFDMA_DMR_SRCS_OFF 0x0 /* Offset to the source size bits */
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#define MCFDMA_DMR_SRCS_LONG 0x00000000L /* Long source size */
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#define MCFDMA_DMR_SRCS_BYTE 0x00000001L /* Byte source size */
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#define MCFDMA_DMR_SRCS_WORD 0x00000002L /* Word source size */
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#define MCFDMA_DMR_SRCS_LINE 0x00000003L /* Line source size */
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/* Bit definitions for the DMA interrupt register (DIR) */
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#define MCFDMA_DIR_INVEN 0x1000 /* Invalid Combination interrupt enable */
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#define MCFDMA_DIR_ASCEN 0x0800 /* Address Sequence Complete (Completion) interrupt enable */
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#define MCFDMA_DIR_TEEN 0x0200 /* Transfer Error interrupt enable */
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#define MCFDMA_DIR_TCEN 0x0100 /* Transfer Complete (a bus transfer, that is) interrupt enable */
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#define MCFDMA_DIR_INV 0x1000 /* Invalid Combination */
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#define MCFDMA_DIR_ASC 0x0008 /* Address Sequence Complete (DMA Completion) */
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#define MCFDMA_DIR_TE 0x0002 /* Transfer Error */
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#define MCFDMA_DIR_TC 0x0001 /* Transfer Complete */
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#endif /* !defined(CONFIG_M5272) */
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/****************************************************************************/
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#endif /* mcfdma_h */
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