1 /* $NetBSD: lebuffer.c,v 1.22 2004/07/19 13:33:35 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: lebuffer.c,v 1.22 2004/07/19 13:33:35 pk Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/errno.h> 46 #include <sys/device.h> 47 #include <sys/malloc.h> 48 49 #include <machine/bus.h> 50 #include <machine/autoconf.h> 51 #include <machine/cpu.h> 52 53 #include <dev/sbus/sbusvar.h> 54 #include <dev/sbus/lebuffervar.h> 55 56 int lebufprint __P((void *, const char *)); 57 int lebufmatch __P((struct device *, struct cfdata *, void *)); 58 void lebufattach __P((struct device *, struct device *, void *)); 59 60 CFATTACH_DECL(lebuffer, sizeof(struct lebuf_softc), 61 lebufmatch, lebufattach, NULL, NULL); 62 63 int 64 lebufprint(aux, busname) 65 void *aux; 66 const char *busname; 67 { 68 69 sbus_print(aux, busname); 70 return (UNCONF); 71 } 72 73 int 74 lebufmatch(parent, cf, aux) 75 struct device *parent; 76 struct cfdata *cf; 77 void *aux; 78 { 79 struct sbus_attach_args *sa = aux; 80 81 return (strcmp(cf->cf_name, sa->sa_name) == 0); 82 } 83 84 /* 85 * Attach all the sub-devices we can find 86 */ 87 void 88 lebufattach(parent, self, aux) 89 struct device *parent, *self; 90 void *aux; 91 { 92 struct sbus_attach_args *sa = aux; 93 struct lebuf_softc *sc = (void *)self; 94 int node; 95 int sbusburst; 96 bus_space_tag_t bt = sa->sa_bustag; 97 bus_dma_tag_t dt = sa->sa_dmatag; 98 bus_space_handle_t bh; 99 100 if (sbus_bus_map(bt, sa->sa_slot, sa->sa_offset, sa->sa_size, 101 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 102 printf("%s: attach: cannot map registers\n", self->dv_xname); 103 return; 104 } 105 106 /* 107 * This device's "register space" is just a buffer where the 108 * Lance ring-buffers can be stored. Note the buffer's location 109 * and size, so the `le' driver can pick them up. 110 */ 111 sc->sc_buffer = bus_space_vaddr(bt, bh); 112 sc->sc_bufsiz = sa->sa_size; 113 114 node = sc->sc_node = sa->sa_node; 115 116 /* 117 * Get transfer burst size from PROM 118 */ 119 sbusburst = ((struct sbus_softc *)parent)->sc_burst; 120 if (sbusburst == 0) 121 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */ 122 123 sc->sc_burst = prom_getpropint(node, "burst-sizes", -1); 124 if (sc->sc_burst == -1) 125 /* take SBus burst sizes */ 126 sc->sc_burst = sbusburst; 127 128 /* Clamp at parent's burst sizes */ 129 sc->sc_burst &= sbusburst; 130 131 sbus_establish(&sc->sc_sd, &sc->sc_dev); 132 133 printf(": %dK memory\n", sc->sc_bufsiz / 1024); 134 135 /* search through children */ 136 for (node = firstchild(node); node; node = nextsibling(node)) { 137 struct sbus_attach_args sa; 138 sbus_setup_attach_args((struct sbus_softc *)parent, 139 bt, dt, node, &sa); 140 (void)config_found(&sc->sc_dev, (void *)&sa, lebufprint); 141 sbus_destroy_attach_args(&sa); 142 } 143 } 144