xref: /src/sys/arch/mac68k/obio/sbc_obio.c

/*	$NetBSD: sbc_obio.c,v 1.27 2025/04/02 01:23:45 nat Exp $	*/

/*
 * Copyright (C) 1996,1997 Scott Reynolds.  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. 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sbc_obio.c,v 1.27 2025/04/02 01:23:45 nat Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/proc.h>

#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsipi_debug.h>
#include <dev/scsipi/scsiconf.h>

#include <dev/ic/ncr5380reg.h>
#include <dev/ic/ncr5380var.h>

#include <machine/cpu.h>
#include <machine/bus.h>
#include <machine/viareg.h>

#include <mac68k/dev/sbcreg.h>
#include <mac68k/dev/sbcvar.h>

#include <mac68k/obio/obiovar.h>

/*
 * From Guide to the Macintosh Family Hardware, pp. 137-143
 * These are offsets from SCSIBase (see pmap_bootstrap.c)
 */
#define	SBC_REG_OFS		0x10000
#define	SBC_DMA_OFS		0x12000
#define	SBC_HSK_OFS		0x06000

#define	SBC_DMA_OFS_PB500	0x06000

#define	SBC_REG_OFS_IIFX	0x08000		/* Just guessing... */
#define	SBC_DMA_OFS_IIFX	0x0c000
#define	SBC_HSK_OFS_IIFX	0x0e000

#define	SBC_REG_OFS_DUO2	0x00000
#define	SBC_DMA_OFS_DUO2	0x02000
#define	SBC_HSK_OFS_DUO2	0x04000

static int	sbc_obio_match(device_t, cfdata_t, void *);
static void	sbc_obio_attach(device_t, device_t, void *);

void	sbc_intr_enable(struct ncr5380_softc *);
void	sbc_intr_disable(struct ncr5380_softc *);
void	sbc_obio_clrintr(struct ncr5380_softc *);

CFATTACH_DECL_NEW(sbc_obio, sizeof(struct sbc_softc),
    sbc_obio_match, sbc_obio_attach, NULL, NULL);

static int
sbc_obio_match(device_t parent, cfdata_t cf, void *aux)
{
	struct obio_attach_args *oa = aux;

	switch (current_mac_model->machineid) {
	case MACH_MACIIFX:	/* Note: the IIfx isn't (yet) supported. */
		if (oa->oa_addr == 0)
			return 1;
		break;

	case MACH_MACPB210:
	case MACH_MACPB230:
	case MACH_MACPB250:
	case MACH_MACPB270:
	case MACH_MACPB280:
	case MACH_MACPB280C:
		if (oa->oa_addr == 1)
			return 1;
		/*FALLTHROUGH*/
	default:
		if (oa->oa_addr == 0 && mac68k_machine.scsi80)
			return 1;
	}
	return 0;
}

static void
sbc_obio_attach(device_t parent, device_t self, void *aux)
{
	struct sbc_softc *sc = device_private(self);
	struct ncr5380_softc *ncr_sc = &sc->ncr_sc;
	struct obio_attach_args *oa = aux;
	char bits[64];
	extern vaddr_t SCSIBase;

	ncr_sc->sc_dev = self;
	/* Pull in the options flags. */
	sc->sc_options = ((device_cfdata(self)->cf_flags |
			   sbc_options) & SBC_OPTIONS_MASK);

	/*
	 * Set up offsets to 5380 registers and GLUE I/O space, and turn
	 * off options we know we can't support on certain models.
	 */
	switch (current_mac_model->machineid) {
	case MACH_MACIIFX:	/* Note: the IIfx isn't (yet) supported. */
		sc->sc_regs = (struct sbc_regs *)(SCSIBase + SBC_REG_OFS_IIFX);
		sc->sc_drq_addr = (vaddr_t)(SCSIBase + SBC_HSK_OFS_IIFX);
		sc->sc_nodrq_addr = (vaddr_t)(SCSIBase + SBC_DMA_OFS_IIFX);
		sc->sc_options &= ~(SBC_INTR | SBC_RESELECT);
		break;
	case MACH_MACPB500:
		sc->sc_regs = (struct sbc_regs *)(SCSIBase + SBC_REG_OFS);
		sc->sc_drq_addr = (vaddr_t)(SCSIBase + SBC_HSK_OFS); /*??*/
		sc->sc_nodrq_addr = (vaddr_t)(SCSIBase + SBC_DMA_OFS_PB500);
		sc->sc_options &= ~(SBC_INTR | SBC_RESELECT);
		break;
	case MACH_MACPB210:
	case MACH_MACPB230:
	case MACH_MACPB250:
	case MACH_MACPB270:
	case MACH_MACPB280:
	case MACH_MACPB280C:
		if (oa->oa_addr == 1) {
			sc->sc_regs = (struct sbc_regs *)(0xfee00000 + SBC_REG_OFS_DUO2);
			sc->sc_drq_addr = (vaddr_t)(0xfee00000 + SBC_HSK_OFS_DUO2);
			sc->sc_nodrq_addr = (vaddr_t)(0xfee00000 + SBC_DMA_OFS_DUO2);
			break;
		}
		/*FALLTHROUGH*/
	default:
		sc->sc_regs = (struct sbc_regs *)(SCSIBase + SBC_REG_OFS);
		sc->sc_drq_addr = (vaddr_t)(SCSIBase + SBC_HSK_OFS);
		sc->sc_nodrq_addr = (vaddr_t)(SCSIBase + SBC_DMA_OFS);
		break;
	}

	/*
	 * Initialize fields used by the MI code
	 */
	ncr_sc->sci_r0 = &sc->sc_regs->sci_pr0.sci_reg;
	ncr_sc->sci_r1 = &sc->sc_regs->sci_pr1.sci_reg;
	ncr_sc->sci_r2 = &sc->sc_regs->sci_pr2.sci_reg;
	ncr_sc->sci_r3 = &sc->sc_regs->sci_pr3.sci_reg;
	ncr_sc->sci_r4 = &sc->sc_regs->sci_pr4.sci_reg;
	ncr_sc->sci_r5 = &sc->sc_regs->sci_pr5.sci_reg;
	ncr_sc->sci_r6 = &sc->sc_regs->sci_pr6.sci_reg;
	ncr_sc->sci_r7 = &sc->sc_regs->sci_pr7.sci_reg;

	ncr_sc->sc_rev = NCR_VARIANT_NCR5380;

	/*
	 * MD function pointers used by the MI code.
	 */
	if (sc->sc_options & SBC_PDMA) {
		ncr_sc->sc_pio_out   = sbc_pdma_out;
		ncr_sc->sc_pio_in    = sbc_pdma_in;
	} else {
		ncr_sc->sc_pio_out   = ncr5380_pio_out;
		ncr_sc->sc_pio_in    = ncr5380_pio_in;
	}
	ncr_sc->sc_dma_alloc = NULL;
	ncr_sc->sc_dma_free  = NULL;
	ncr_sc->sc_dma_poll  = NULL;
	ncr_sc->sc_intr_on   = NULL;
	ncr_sc->sc_intr_off  = NULL;
	ncr_sc->sc_dma_setup = NULL;
	ncr_sc->sc_dma_start = NULL;
	ncr_sc->sc_dma_eop   = NULL;
	ncr_sc->sc_dma_stop  = NULL;
	ncr_sc->sc_flags = 0;
	ncr_sc->sc_min_dma_len = MIN_DMA_LEN;

	if (sc->sc_options & SBC_INTR) {
		ncr_sc->sc_dma_alloc = sbc_dma_alloc;
		ncr_sc->sc_dma_free  = sbc_dma_free;
		ncr_sc->sc_dma_poll  = sbc_dma_poll;
		ncr_sc->sc_dma_setup = sbc_dma_setup;
		ncr_sc->sc_dma_start = sbc_dma_start;
		ncr_sc->sc_dma_eop   = sbc_dma_eop;
		ncr_sc->sc_dma_stop  = sbc_dma_stop;
		via2_register_irq(VIA2_SCSIDRQ, sbc_drq_intr, ncr_sc);
	}

	mutex_init(&sc->sc_drq_lock, MUTEX_DEFAULT, IPL_BIO);

	via2_register_irq(VIA2_SCSIIRQ, sbc_irq_intr, ncr_sc);
	sc->sc_clrintr = sbc_obio_clrintr;

	if ((sc->sc_options & SBC_RESELECT) == 0)
		ncr_sc->sc_no_disconnect = 0xff;

	if (sc->sc_options) {
		snprintb(bits, sizeof(bits), SBC_OPTIONS_BITS, sc->sc_options);
		aprint_normal(": options=%s", bits);
	}
	aprint_normal("\n");

	if (sc->sc_options & (SBC_INTR|SBC_RESELECT)) {
		/* Enable SCSI interrupts through VIA2 */
		sbc_intr_enable(ncr_sc);
	}

#ifdef SBC_DEBUG
	if (sbc_debug)
		aprint_debug_dev(self, "softc=%p regs=%p\n", sc, sc->sc_regs);
#endif

	ncr_sc->sc_channel.chan_id = 7;
	ncr_sc->sc_adapter.adapt_minphys = minphys;

	/*
	 *  Initialize the SCSI controller itself.
	 */
	ncr5380_attach(ncr_sc);
}

/*
 * Interrupt support routines.
 */
void
sbc_intr_enable(struct ncr5380_softc *ncr_sc)
{
	struct sbc_softc *sc = (struct sbc_softc *)ncr_sc;
	int s, flags;

	flags = V2IF_SCSIIRQ;
	if (sc->sc_options & SBC_INTR)
		flags |= V2IF_SCSIDRQ;

	s = splhigh();
	if (VIA2 == VIA2OFF)
		via2_reg(vIER) = 0x80 | flags;
	else
		via2_reg(rIER) = 0x80 | flags;
	splx(s);
}

void
sbc_intr_disable(struct ncr5380_softc *ncr_sc)
{
	struct sbc_softc *sc = (struct sbc_softc *)ncr_sc;
	int s, flags;

	flags = V2IF_SCSIIRQ;
	if (sc->sc_options & SBC_INTR)
		flags |= V2IF_SCSIDRQ;

	s = splhigh();
	if (VIA2 == VIA2OFF)
		via2_reg(vIER) = flags;
	else
		via2_reg(rIER) = flags;
	splx(s);
}

void
sbc_obio_clrintr(struct ncr5380_softc *ncr_sc)
{
	struct sbc_softc *sc = (struct sbc_softc *)ncr_sc;
	int flags;

	flags = V2IF_SCSIIRQ;
	if (sc->sc_options & SBC_INTR)
		flags |= V2IF_SCSIDRQ;

	if (VIA2 == VIA2OFF)
		via2_reg(vIFR) = 0x80 | flags;
	else
		via2_reg(rIFR) = 0x80 | flags;
}