From netbsd:

driver for le at lebuffer type devices

1 files changed, 164 insertions, 0 deletions

diff --git a/sys/dev/sbus/lebuffer.c b/sys/dev/sbus/lebuffer.c
new file mode 100644
index 00000000000..6b75662d8a2
--- /dev/null
+++ b/sys/dev/sbus/lebuffer.c
@@ -0,0 +1,164 @@
+/*	$OpenBSD: lebuffer.c,v 1.1 2002/05/13 15:12:12 jason Exp $	*/
+/*	$NetBSD: lebuffer.c,v 1.12 2002/03/11 16:00:57 pk Exp $ */
+
+/*-
+ * Copyright (c) 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Paul Kranenburg.
+ *
+ * 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 the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/errno.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+
+#include <machine/bus.h>
+#include <machine/autoconf.h>
+#include <machine/cpu.h>
+
+#include <dev/sbus/sbusvar.h>
+#include <dev/sbus/lebuffervar.h>
+
+int	lebufprint(void *, const char *);
+int	lebufmatch(struct device *, void *, void *);
+void	lebufattach(struct device *, struct device *, void *);
+
+struct cfattach lebuffer_ca = {
+	sizeof(struct lebuf_softc), lebufmatch, lebufattach
+};
+
+int
+lebufprint(aux, busname)
+	void *aux;
+	const char *busname;
+{
+	struct sbus_attach_args *sa = aux;
+	bus_space_tag_t t = sa->sa_bustag;
+	struct lebuf_softc *sc = t->cookie;
+
+	sa->sa_bustag = sc->sc_bustag;	/* XXX */
+	sbus_print(aux, busname);	/* XXX */
+	sa->sa_bustag = t;		/* XXX */
+	return (UNCONF);
+}
+
+int
+lebufmatch(parent, vcf, aux)
+	struct device *parent;
+	void *vcf;
+	void *aux;
+{
+	struct sbus_attach_args *sa = aux;
+	struct cfdata *cf = vcf;
+
+	return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
+}
+
+/*
+ * Attach all the sub-devices we can find
+ */
+void
+lebufattach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct sbus_attach_args *sa = aux;
+	struct lebuf_softc *sc = (void *)self;
+	int node;
+	int sbusburst;
+	bus_space_tag_t sbt;
+	bus_space_handle_t bh;
+
+	sc->sc_bustag = sa->sa_bustag;
+	sc->sc_dmatag = sa->sa_dmatag;
+
+	if (sbus_bus_map(sa->sa_bustag,
+			 sa->sa_slot, sa->sa_offset, sa->sa_size,
+			 BUS_SPACE_MAP_LINEAR, 0, &bh) != 0) {
+		printf("%s: attach: cannot map registers\n", self->dv_xname);
+		return;
+	}
+
+	/*
+	 * This device's "register space" is just a buffer where the
+	 * Lance ring-buffers can be stored. Note the buffer's location
+	 * and size, so the `le' driver can pick them up.
+	 */
+	sc->sc_buffer = (void *)bus_space_vaddr(sa->sa_bustag, bh);
+	sc->sc_bufsiz = sa->sa_size;
+
+	node = sc->sc_node = sa->sa_node;
+
+	/*
+	 * Get transfer burst size from PROM
+	 */
+	sbusburst = ((struct sbus_softc *)parent)->sc_burst;
+	if (sbusburst == 0)
+		sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
+
+	sc->sc_burst = getpropint(node, "burst-sizes", -1);
+	if (sc->sc_burst == -1)
+		/* take SBus burst sizes */
+		sc->sc_burst = sbusburst;
+
+	/* Clamp at parent's burst sizes */
+	sc->sc_burst &= sbusburst;
+
+	sbus_establish(&sc->sc_sd, &sc->sc_dev);
+
+	/* Allocate a bus tag */
+	sbt = (bus_space_tag_t) malloc(sizeof(struct sparc_bus_space_tag), 
+	    M_DEVBUF, M_NOWAIT);
+	if (sbt == NULL) {
+		printf("%s: attach: out of memory\n", self->dv_xname);
+		return;
+	}
+	bzero(sbt, sizeof(struct sparc_bus_space_tag));
+
+	printf(": %dK memory\n", sc->sc_bufsiz / 1024);
+
+	sbt->cookie = sc;
+	sbt->parent = sc->sc_bustag;
+
+	/* search through children */
+	for (node = firstchild(node); node; node = nextsibling(node)) {
+		struct sbus_attach_args sa;
+		sbus_setup_attach_args((struct sbus_softc *)parent,
+				       sbt, sc->sc_dmatag, node, &sa);
+		(void)config_found(&sc->sc_dev, (void *)&sa, lebufprint);
+		sbus_destroy_attach_args(&sa);
+	}
+}