1 /* $NetBSD: lebuffer.c,v 1.36 2009/09/17 17:53:35 tsutsui 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: lebuffer.c,v 1.36 2009/09/17 17:53:35 tsutsui Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/errno.h> 39 #include <sys/device.h> 40 #include <sys/malloc.h> 41 42 #include <sys/bus.h> 43 #include <machine/autoconf.h> 44 #include <sys/cpu.h> 45 46 #include <dev/sbus/sbusvar.h> 47 #include <dev/sbus/lebuffervar.h> 48 49 int lebufprint(void *, const char *); 50 int lebufmatch(device_t, cfdata_t, void *); 51 void lebufattach(device_t, device_t, void *); 52 53 CFATTACH_DECL_NEW(lebuffer, sizeof(struct lebuf_softc), 54 lebufmatch, lebufattach, NULL, NULL); 55 56 int 57 lebufprint(void *aux, const char *busname) 58 { 59 60 sbus_print(aux, busname); 61 return (UNCONF); 62 } 63 64 int 65 lebufmatch(device_t parent, cfdata_t cf, void *aux) 66 { 67 struct sbus_attach_args *sa = aux; 68 69 return (strcmp(cf->cf_name, sa->sa_name) == 0); 70 } 71 72 /* 73 * Attach all the sub-devices we can find 74 */ 75 void 76 lebufattach(device_t parent, device_t self, void *aux) 77 { 78 struct sbus_attach_args *sa = aux; 79 struct lebuf_softc *sc = device_private(self); 80 struct sbus_softc *sbsc = device_private(parent); 81 int node; 82 int sbusburst; 83 bus_space_tag_t bt = sa->sa_bustag; 84 bus_dma_tag_t dt = sa->sa_dmatag; 85 bus_space_handle_t bh; 86 87 sc->sc_dev = self; 88 89 if (sbus_bus_map(bt, sa->sa_slot, sa->sa_offset, sa->sa_size, 90 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 91 aprint_error(": cannot map registers\n"); 92 return; 93 } 94 95 /* 96 * This device's "register space" is just a buffer where the 97 * Lance ring-buffers can be stored. Note the buffer's location 98 * and size, so the `le' driver can pick them up. 99 */ 100 sc->sc_buffer = bus_space_vaddr(bt, bh); 101 sc->sc_bufsiz = sa->sa_size; 102 103 node = sc->sc_node = sa->sa_node; 104 105 /* 106 * Get transfer burst size from PROM 107 */ 108 sbusburst = sbsc->sc_burst; 109 if (sbusburst == 0) 110 sbusburst = SBUS_BURST_32 - 1; /* 1->16 */ 111 112 sc->sc_burst = prom_getpropint(node, "burst-sizes", -1); 113 if (sc->sc_burst == -1) 114 /* take SBus burst sizes */ 115 sc->sc_burst = sbusburst; 116 117 /* Clamp at parent's burst sizes */ 118 sc->sc_burst &= sbusburst; 119 120 printf(": %dK memory\n", sc->sc_bufsiz / 1024); 121 122 /* search through children */ 123 for (node = firstchild(node); node; node = nextsibling(node)) { 124 struct sbus_attach_args sax; 125 sbus_setup_attach_args(sbsc, 126 bt, dt, node, &sax); 127 (void)config_found(self, (void *)&sax, lebufprint); 128 sbus_destroy_attach_args(&sax); 129 } 130 } 131