NetBSD/sys/arch/arc/jazz/dma.h

/*	$NetBSD: dma.h,v 1.1 2000/12/24 09:25:28 ur Exp $	*/
/*	$OpenBSD: dma.h,v 1.3 1997/04/19 17:19:51 pefo Exp $	*/

/*
 * Copyright (c) 1996 Per Fogelstrom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Per Fogelstrom.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 *  Hardware dma registers.
 */
typedef volatile struct {
	int32_t		dma_mode;
	int32_t		pad1;
	int32_t		dma_enab;
	int32_t		pad2;
	int32_t		dma_count;
	int32_t		pad3;
	int32_t		dma_addr;
	int32_t		pad4;
} DmaReg, *pDmaReg;

#define	R4030_DMA_MODE_40NS	0x00	/* Device dma timing */
#define	R4030_DMA_MODE_80NS	0x01	/* Device dma timing */
#define	R4030_DMA_MODE_120NS	0x02	/* Device dma timing */
#define	R4030_DMA_MODE_160NS	0x03	/* Device dma timing */
#define	R4030_DMA_MODE_200NS	0x04	/* Device dma timing */
#define	R4030_DMA_MODE_240NS	0x05	/* Device dma timing */
#define	R4030_DMA_MODE_280NS	0x06	/* Device dma timing */
#define	R4030_DMA_MODE_320NS	0x07	/* Device dma timing */
#define	R4030_DMA_MODE_8		0x08	/* Device 8 bit  */
#define	R4030_DMA_MODE_16	0x10	/* Device 16 bit */
#define	R4030_DMA_MODE_32	0x18	/* Device 32 bit */
#define	R4030_DMA_MODE_INT	0x20	/* Interrupt when done */
#define	R4030_DMA_MODE_BURST	0x40	/* Burst mode (Rev 2 only) */
#define R4030_DMA_MODE_FAST	0x80	/* Fast dma cycle (Rev 2 only) */
#define R4030_DMA_MODE		0xff	/* Mode register bits */
#define DMA_DIR_WRITE		0x100	/* Software direction status */
#define DMA_DIR_READ		0x000	/* Software direction status */

#define	R4030_DMA_ENAB_RUN	0x01	/* Enable dma */
#define	R4030_DMA_ENAB_READ	0x00	/* Read from device */
#define	R4030_DMA_ENAB_WRITE	0x02	/* Write to device */
#define	R4030_DMA_ENAB_TC_IE	0x100	/* Terminal count int enable */
#define	R4030_DMA_ENAB_ME_IE	0x200	/* Memory error int enable */
#define	R4030_DMA_ENAB_TL_IE	0x400	/* Translation limit int enable */

#define	R4030_DMA_COUNT_MASK	0x000fffff /* Byte count mask */

/*
 *  Structure used to control dma.
 */

typedef struct dma_softc {
	struct device	sc_dev;		/* use as a device */
	struct esp_softc *sc_esp;
	bus_addr_t	dma_va;		/* Viritual address for transfer */
	int		mode;		/* Mode register value and direction */
	jazz_dma_pte_t	*pte_base;	/* Pointer to dma tlb array */
	int		pte_size;	/* Size of pte allocated pte array */
	pDmaReg		dma_reg;	/* Pointer to dma registers */
	int		sc_active;	/* Active flag */
	void (*reset)(struct dma_softc *);	/* Reset routine pointer */
	void (*enintr)(struct dma_softc *);	/* Int enab routine pointer */
	void (*map)(struct dma_softc *, char *, size_t, int);
						/* Map a dma viritual area */
	void (*start)(struct dma_softc *, caddr_t, size_t, int);
						/* Start routine pointer */
	int (*isintr)(struct dma_softc *);	/* Int check routine pointer */
	int (*intr)(struct dma_softc *);	/* Interrupt routine pointer */
	void (*end)(struct dma_softc *);	/* Interrupt routine pointer */
} dma_softc_t;

#define	DMA_TO_DEV	0
#define	DMA_FROM_DEV	1

#define	DMA_RESET(r)		((r->reset)(r))
#define	DMA_START(a, b, c, d)	((a->start)(a, b, c, d))
#define	DMA_MAP(a, b, c, d)	((a->map)(a, b, c, d))
#define	DMA_INTR(r)		((r->intr)(r))
#define	DMA_DRAIN(r)
#define	DMA_END(r)		((r->end)(r))

void picaDmaInit __P((void));
void picaDmaTLBAlloc __P((dma_softc_t *));
void picaDmaTLBFree __P((dma_softc_t *));
void picaDmaMap __P((struct dma_softc *, char *, size_t, int));
void picaDmaStart __P((struct dma_softc *, char *, size_t, int));
void picaDmaFlush __P((struct dma_softc *, char *, size_t, int));
void asc_dma_init __P((struct dma_softc *));
void fdc_dma_init __P((struct dma_softc *));
void sn_dma_init __P((struct dma_softc *, int));