initial import of NetBSD tree

1 files changed, 172 insertions, 0 deletions

diff --git a/sys/dev/isa/ast.c b/sys/dev/isa/ast.c
new file mode 100644
index 00000000000..77abde08861
--- /dev/null
+++ b/sys/dev/isa/ast.c
@@ -0,0 +1,172 @@
+/*	$NetBSD: ast.c,v 1.18 1995/06/26 04:08:04 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1995 Charles Hannum.  All rights reserved.
+ *
+ * This code is derived from public-domain software written by
+ * Roland McGrath.
+ *
+ * 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 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.
+ */
+
+#include <sys/param.h>
+#include <sys/device.h>
+
+#include <machine/pio.h>
+
+#include <dev/isa/isavar.h>
+
+struct ast_softc {
+	struct device sc_dev;
+	void *sc_ih;
+
+	int sc_iobase;
+	int sc_alive;		/* mask of slave units attached */
+	void *sc_slaves[4];	/* com device unit numbers */
+};
+
+int astprobe();
+void astattach();
+int astintr __P((void *));
+
+struct cfdriver astcd = {
+	NULL, "ast", astprobe, astattach, DV_TTY, sizeof(struct ast_softc)
+};
+
+int
+astprobe(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct isa_attach_args *ia = aux;
+
+	/*
+	 * Do the normal com probe for the first UART and assume
+	 * its presence means there is a multiport board there.
+	 * XXX Needs more robustness.
+	 */
+	ia->ia_iosize = 4 * 8;
+	return (comprobe1(ia->ia_iobase));
+}
+
+struct ast_attach_args {
+	int aa_slave;
+};
+
+int
+astsubmatch(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct ast_softc *sc = (void *)parent;
+	struct cfdata *cf = match;
+	struct isa_attach_args *ia = aux;
+	struct ast_attach_args *aa = ia->ia_aux;
+
+	if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != aa->aa_slave)
+		return (0);
+	return ((*cf->cf_driver->cd_match)(parent, match, ia));
+}
+
+int
+astprint(aux, ast)
+	void *aux;
+	char *ast;
+{
+	struct isa_attach_args *ia = aux;
+	struct ast_attach_args *aa = ia->ia_aux;
+
+	printf(" slave %d", aa->aa_slave);
+}
+
+void
+astattach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct ast_softc *sc = (void *)self;
+	struct isa_attach_args *ia = aux;
+	struct ast_attach_args aa;
+	struct isa_attach_args isa;
+	int subunit;
+
+	sc->sc_iobase = ia->ia_iobase;
+
+	/*
+	 * Enable the master interrupt.
+	 */
+	outb(sc->sc_iobase | 0x1f, 0x80);
+
+	printf("\n");
+
+	isa.ia_aux = &aa;
+	for (aa.aa_slave = 0; aa.aa_slave < 4; aa.aa_slave++) {
+		struct cfdata *cf;
+		isa.ia_iobase = sc->sc_iobase + 8 * aa.aa_slave;
+		isa.ia_iosize = 0x666;
+		isa.ia_irq = IRQUNK;
+		isa.ia_drq = DRQUNK;
+		isa.ia_msize = 0;
+		if ((cf = config_search(astsubmatch, self, &isa)) != 0) {
+			subunit = cf->cf_unit;	/* can change if unit == * */
+			config_attach(self, cf, &isa, astprint);
+			sc->sc_slaves[aa.aa_slave] =
+			    cf->cf_driver->cd_devs[subunit];
+			sc->sc_alive |= 1 << aa.aa_slave;
+		}
+	}
+
+	sc->sc_ih = isa_intr_establish(ia->ia_irq, ISA_IST_EDGE, ISA_IPL_TTY,
+	    astintr, sc);
+}
+
+int
+astintr(arg)
+	void *arg;
+{
+	struct ast_softc *sc = arg;
+	int iobase = sc->sc_iobase;
+	int alive = sc->sc_alive;
+	int bits;
+
+	bits = ~inb(iobase | 0x1f) & alive;
+	if (bits == 0)
+		return (0);
+
+	for (;;) {
+#define	TRY(n) \
+		if (bits & (1 << (n))) \
+			comintr(sc->sc_slaves[n]);
+		TRY(0);
+		TRY(1);
+		TRY(2);
+		TRY(3);
+#undef TRY
+		bits = ~inb(iobase | 0x1f) & alive;
+		if (bits == 0)
+			return (1);
+ 	}
+}