Add a skeleton driver for the random latches on the Archimedes, which are

shared between the printer port and floppy drive.  Useful facilities will be
added when I know what I need.

sys/arch/arm26/conf/FOURMEG

@@ -1,4 +1,4 @@
-# $NetBSD: FOURMEG,v 1.13 2001/04/10 21:33:00 bjh21 Exp $
+# $NetBSD: FOURMEG,v 1.14 2001/04/22 00:26:35 bjh21 Exp $
 
 # FOURMEG arm26 configuration -- something small
 
@@ -130,6 +130,7 @@ arcwsmouse0	at arckbd0
 wsmouse0	at arcwsmouse0
 
 ioeb0		at ioc0 bank 5		# I/O Extension Block (A5000)
+latches0	at ioc0 bank 5		# Printer/FDC control latches (Arc)
 
 podulebus0	at ioc0 bank 4		# Expansion card bus
 unixbp0 	at ioc0 bank 6		# Unix Backplane (interrupt routing)

sys/arch/arm26/conf/GENERIC

@@ -1,4 +1,4 @@
-# $NetBSD: GENERIC,v 1.19 2001/04/10 21:33:00 bjh21 Exp $
+# $NetBSD: GENERIC,v 1.20 2001/04/22 00:26:35 bjh21 Exp $
 
 # GENERIC arm26 configuration -- everything I've implemented so far
 
@@ -127,6 +127,7 @@ arcwsmouse0	at arckbd0
 wsmouse0	at arcwsmouse0
 
 ioeb0		at ioc0 bank 5		# I/O Extension Block (A5000)
+latches0	at ioc0 bank 5		# Printer/FDC control latches (Arc)
 
 podulebus0	at ioc0 bank 4		# Expansion card bus
 unixbp0 	at ioc0 bank 6		# Unix Backplane (interrupt routing)

sys/arch/arm26/conf/files.arm26

@@ -1,4 +1,4 @@
-# $NetBSD: files.arm26,v 1.27 2001/04/10 21:33:01 bjh21 Exp $
+# $NetBSD: files.arm26,v 1.28 2001/04/22 00:26:35 bjh21 Exp $
 
 # Copyright (c) 1997, 1998, 2000 Ben Harris
 # All rights reserved.
@@ -84,9 +84,10 @@ file	arch/arm26/ioc/ioeb.c			ioeb		needs-flag
 device joy
 attach joy at ioeb
 
-# Latches (random internal use) (usually at bank 5 offset 0x18 and 0x40)
+# Latches (random internal use) (usually at ioc0 bank 5)
-device	latch
+device	latches
-attach	latch at ioc
+attach	latches at ioc
+file	arch/arm26/ioc/latches.c		latches
 
 # On-board keyboard interface
 device	arckbd { }

sys/arch/arm26/ioc/latches.c

@@ -0,0 +1,99 @@
+/* $NetBSD: latches.c,v 1.1 2001/04/22 00:26:36 bjh21 Exp $ */
+
+/*-
+ * Copyright (c) 2001 Ben Harris
+ * 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/param.h>
+
+__KERNEL_RCSID(0, "$NetBSD: latches.c,v 1.1 2001/04/22 00:26:36 bjh21 Exp $");
+
+#include <sys/device.h>
+#include <sys/systm.h>
+
+#include <machine/bus.h>
+
+#include <arch/arm26/iobus/iocvar.h>
+#include <arch/arm26/ioc/latchreg.h>
+#include <arch/arm26/ioc/latchvar.h>
+#include <arch/arm26/ioc/ioebvar.h>
+
+#include "ioeb.h"
+
+struct latches_softc {
+	struct device		sc_dev;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_ioh;
+	u_int8_t	sc_latcha;
+	u_int8_t	sc_latchb;
+};
+
+static int latches_match(struct device *, struct cfdata *, void *);
+static void latches_attach(struct device *, struct device *, void *);
+
+struct cfattach latches_ca = {
+	sizeof(struct latches_softc), latches_match, latches_attach
+};
+
+struct device *the_latches;
+
+static int
+latches_match(struct device *parent, struct cfdata *cf, void *aux)
+{
+
+	/*
+	 * Latches are write-only, so we can't probe for them.
+	 * Happily, the set of machines they exist on is precisely the
+	 * set that doesn't have IOEBs, so...
+	 */
+#if NIOEB > 0
+	if (the_ioeb != NULL)
+		return 0;
+#endif
+	return 1;
+}
+
+static void
+latches_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct latches_softc *sc = (void *)self;
+	struct ioc_attach_args *ioc = aux;
+	bus_space_tag_t iot;
+	bus_space_handle_t ioh;
+
+	if (the_latches == NULL)
+		the_latches = self;
+	iot = sc->sc_iot = ioc->ioc_fast_t;
+	ioh = sc->sc_ioh = ioc->ioc_fast_h;
+
+	sc->sc_latcha =
+	    LATCHA_NSEL0 | LATCHA_NSEL1 | LATCHA_NSEL2 | LATCHA_NSEL3 |
+	    LATCHA_NSIDE1 | LATCHA_NMOTORON | LATCHA_NINUSE;
+	sc->sc_latchb = LATCHB_NFDCR | LATCHB_NPSTB;
+	bus_space_write_1(sc->sc_iot, sc->sc_ioh, LATCH_A, sc->sc_latcha);
+	bus_space_write_1(sc->sc_iot, sc->sc_ioh, LATCH_B, sc->sc_latchb);
+	printf("\n");
+}

sys/arch/arm26/ioc/latchreg.h

@@ -1,6 +1,6 @@
-/* $NetBSD: latchreg.h,v 1.1 2000/05/09 21:56:02 bjh21 Exp $ */
+/* $NetBSD: latchreg.h,v 1.2 2001/04/22 00:26:36 bjh21 Exp $ */
 /*-
- * Copyright (c) 1997, 1998 Ben Harris
+ * Copyright (c) 1997, 1998, 2001 Ben Harris
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -30,31 +30,32 @@
  * latchreg.h - Archimedes internal latches
  */
 
-/* Under NetBSD, Latch A is latch0 and Latch B is latch1. */
-
 #ifndef _LATCHREG_H
 #define _LATCHREG_H
 
-/* Latch A controls some of the floppy disc system */
+/* Register offsets for latches (bus_space units) */
 
-#define LATCH0_DRIVESEL0	0x01	/* Floppy drive 0 select */
+#define LATCH_A		0x10
-#define LATCH0_DRIVESEL1	0x02	/* Floppy drive 1 select */
+#define LATCH_B		0x06
-#define LATCH0_DRIVESEL2	0x04	/* Floppy drive 2 select */
-#define LATCH0_DRIVESEL3	0x08	/* Floppy drive 3 select */
-#define LATCH0_SIDESEL		0x10	/* Floppy side select, inverted. */
-#define LATCH0_SIDE0		0x10
-#define LATCH0_SIDE1		0x00	/* Just to be friendly... */
-#define LATCH0_MOTORONOFF	0x20	/* Motor on/off */
-#define LATCH0_INUSE		0x40	/* 'In Use' */
 
-/* Latch B does all sorts of random stuff */
+/* Latch A controls some of the floppy disc system (all active-low). */
+#define LATCHA_NSEL0	0x01	/* Floppy drive 0 select */
+#define LATCHA_NSEL1	0x02	/* Floppy drive 1 select */
+#define LATCHA_NSEL2	0x04	/* Floppy drive 2 select */
+#define LATCHA_NSEL3	0x08	/* Floppy drive 3 select */
+#define LATCHA_NSIDE1	0x10	/* Floppy side select. */
+#define LATCHA_NMOTORON	0x20	/* Motor on/off */
+#define LATCHA_NINUSE	0x40	/* 'In Use' */
+/* Bit 7 not used */
 
-#define LATCH1_DENSITY		0x02	/* Floppy disc density setting */
+/* Latch B does all sorts of random stuff (mostly active-low). */
-#define LATCH1_DOUBLEDENSITY	0x00	/* Double density */
+/* Bit 0 reserved */
-#define LATCH1_SINGLEDENSITY	0x02	/* Single density */
+#define LATCHB_NDDEN	0x02	/* Floppy disc density setting */
-#define LATCH1_NOTFDCRESET	0x08	/* Floppy controller reset (inverted) */
+/* Bit 2 reserved */
-#define LATCH1_LPTSTROBE	0x10	/* Printer strobe line */
+#define LATCHB_NFDCR	0x08	/* Floppy controller reset */
-#define LATCH1_AUX1		0x20	/* Spare (VIDC Enhancer?) */
+#define LATCHB_NPSTB	0x10	/* Printer strobe line */
-#define LATCH1_AUX2		0x40	/* Spare */
+#define LATCHB_AUX1	0x20	/* Spare (VIDC Enhancer?) */
+#define LATCHB_AUX2	0x40	/* Spare */
+/* Bit 7 not used */
 
 #endif /* !_LATCHREG_H */

sys/arch/arm26/ioc/latchvar.h

@@ -0,0 +1,33 @@
+/* $NetBSD: latchvar.h,v 1.1 2001/04/22 00:26:36 bjh21 Exp $ */
+
+/*-
+ * Copyright (c) 2001 Ben Harris
+ * 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.
+ */
+
+#ifndef _LATCHVAR_H_
+#define _LATCHVAR_H_
+extern struct device *the_latches;
+#endif