/*	$NetBSD: wdcvar.h,v 1.1 1998/01/14 23:42:04 cgd Exp $	*/

/*
 * Copyright (c) 1994, 1995 Charles M. Hannum.  All rights reserved.
 *
 * DMA and multi-sector PIO handling are derived from code contributed by
 * Onno van der Linden.
 *
 * Atapi support added by Manuel Bouyer.
 *
 * bus_space-ified by Christopher G. Demetriou.
 *
 * 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 Charles M. Hannum.
 * 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.
 */

struct wdc_attachment_data {
	/* manadatory fields */
	int			cap;
	bus_space_tag_t		iot;
	bus_space_handle_t	ioh;
	bus_space_tag_t		auxiot;
	bus_space_handle_t	auxioh;
	/*
	 * XXX data access (normal and 32-bit) may need to be
	 * done via a separate iot/ioh on some systems.  Let's
	 * wait and see if that's the case before implementing
	 * it.
	 */

	/* if WDC_CAPABILITY_DMA set in 'cap' */
	void			*dma_arg;
	void			(*dma_setup) __P((void *));
	void			(*dma_start) __P((void *, void *, size_t,
				    int));
	void			(*dma_finish) __P((void *));
};

/* Capabilities supported by the controller */
#define	WDC_CAPABILITY_DATA32	0x01		/* 32-bit data access */
#define	WDC_CAPABILITY_DMA	0x02		/* DMA */

struct wdc_softc {
	struct device sc_dev;
	const struct wdc_attachment_data *sc_adp;

	struct wd_link *d_link[2];
	struct scsipi_link *ab_link;

	TAILQ_HEAD(xferhead, wdc_xfer) sc_xfer;
	int sc_flags;
#define	WDCF_ACTIVE		0x01	/* controller is active */
#define	WDCF_SINGLE		0x02	/* sector at a time mode */
#define	WDCF_ERROR		0x04	/* processing a disk error */
#define	WDCF_WANTED		0x08	/* XXX locking for wd_get_parms() */
#define	WDCF_IRQ_WAIT		0x10	/* controller is waiting for irq */
#define	WDCF_ONESLAVE		0x20	/* ctrl. has one ATAPI slave attached */
	int sc_errors;			/* errors during current transfer */
	u_char sc_status;		/* copy of status register */
	u_char sc_error;		/* copy of error register */
	u_char sc_drives_mask;	/* bitmask for drives present/absent */
};

#define	sc_cap		sc_adp->cap
#define	sc_iot		sc_adp->iot
#define	sc_ioh		sc_adp->ioh
#define	sc_auxiot	sc_adp->auxiot
#define	sc_auxioh	sc_adp->auxioh
#define	sc_dma_arg	sc_adp->dma_arg
#define	sc_dma_setup	sc_adp->dma_setup
#define	sc_dma_start	sc_adp->dma_start
#define	sc_dma_finish	sc_adp->dma_finish

void	wdcattach(struct wdc_softc *, const struct wdc_attachment_data *);
int	wdcintr(void *);
int	wdcprobe(const struct wdc_attachment_data *);