131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
/* $NetBSD: lebuffer.c,v 1.36 2009/09/17 17:53:35 tsutsui Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: lebuffer.c,v 1.36 2009/09/17 17:53:35 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/bus.h>
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#include <machine/autoconf.h>
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#include <sys/cpu.h>
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#include <dev/sbus/sbusvar.h>
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#include <dev/sbus/lebuffervar.h>
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int lebufprint(void *, const char *);
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int lebufmatch(device_t, cfdata_t, void *);
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void lebufattach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(lebuffer, sizeof(struct lebuf_softc),
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lebufmatch, lebufattach, NULL, NULL);
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int
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lebufprint(void *aux, const char *busname)
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{
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sbus_print(aux, busname);
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return (UNCONF);
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}
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int
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lebufmatch(device_t parent, cfdata_t cf, void *aux)
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{
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struct sbus_attach_args *sa = aux;
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return (strcmp(cf->cf_name, sa->sa_name) == 0);
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}
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/*
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* Attach all the sub-devices we can find
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*/
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void
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lebufattach(device_t parent, device_t self, void *aux)
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{
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struct sbus_attach_args *sa = aux;
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struct lebuf_softc *sc = device_private(self);
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struct sbus_softc *sbsc = device_private(parent);
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int node;
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int sbusburst;
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bus_space_tag_t bt = sa->sa_bustag;
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bus_dma_tag_t dt = sa->sa_dmatag;
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bus_space_handle_t bh;
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sc->sc_dev = self;
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if (sbus_bus_map(bt, sa->sa_slot, sa->sa_offset, sa->sa_size,
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BUS_SPACE_MAP_LINEAR, &bh) != 0) {
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aprint_error(": cannot map registers\n");
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return;
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}
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/*
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* This device's "register space" is just a buffer where the
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* Lance ring-buffers can be stored. Note the buffer's location
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* and size, so the `le' driver can pick them up.
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*/
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sc->sc_buffer = bus_space_vaddr(bt, bh);
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sc->sc_bufsiz = sa->sa_size;
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node = sc->sc_node = sa->sa_node;
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/*
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* Get transfer burst size from PROM
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*/
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sbusburst = sbsc->sc_burst;
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if (sbusburst == 0)
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sbusburst = SBUS_BURST_32 - 1; /* 1->16 */
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sc->sc_burst = prom_getpropint(node, "burst-sizes", -1);
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if (sc->sc_burst == -1)
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/* take SBus burst sizes */
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sc->sc_burst = sbusburst;
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/* Clamp at parent's burst sizes */
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sc->sc_burst &= sbusburst;
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printf(": %dK memory\n", sc->sc_bufsiz / 1024);
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/* search through children */
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for (node = firstchild(node); node; node = nextsibling(node)) {
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struct sbus_attach_args sax;
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sbus_setup_attach_args(sbsc,
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bt, dt, node, &sax);
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(void)config_found(self, (void *)&sax, lebufprint);
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sbus_destroy_attach_args(&sax);
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}
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}
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