sgc.c revision 1.2
1/* $NetBSD: sgc.c,v 1.2 2011/02/18 19:15:06 tsutsui Exp $ */ 2/* $OpenBSD: sgc.c,v 1.6 2010/04/15 20:35:21 miod Exp $ */ 3 4/* 5 * Copyright (c) 2005, Miodrag Vallat 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 * 28 */ 29 30/* 31 * SGC bus attachment and mapping glue. 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/device.h> 37#include <sys/kernel.h> 38#include <sys/bus.h> 39#include <sys/cpu.h> 40 41#include <machine/autoconf.h> 42#include <machine/hp300spu.h> 43 44#include <hp300/dev/sgcreg.h> 45#include <hp300/dev/sgcvar.h> 46 47#ifdef SGC_DEBUG 48#define DPRINTF(x) printf x 49#else 50#define DPRINTF(x) do {} while (/* CONSTCOND */ 0) 51#endif 52 53struct sgc_softc { 54 device_t sc_dev; 55 struct bus_space_tag sc_tag; 56}; 57 58static int sgcmatch(device_t, cfdata_t, void *); 59static void sgcattach(device_t, device_t, void *); 60static int sgcprint(void *, const char *); 61 62CFATTACH_DECL_NEW(sgc, sizeof(struct sgc_softc), 63 sgcmatch, sgcattach, NULL, NULL); 64 65int 66sgcmatch(device_t parent, cfdata_t cf, void *aux) 67{ 68 static int sgc_matched = 0; 69 70 /* Allow only one instance. */ 71 if (sgc_matched) 72 return 0; 73 74 /* 75 * Leave out machines which can not have an SGC bus. 76 */ 77 78 switch (machineid) { 79#if 0 80 case HP_362: 81 case HP_382: 82#endif 83 case HP_400: 84 case HP_425: 85 case HP_433: 86 return sgc_matched = 1; 87 default: 88 return 0; 89 } 90} 91 92void 93sgcattach(device_t parent, device_t self, void *aux) 94{ 95 struct sgc_softc *sc; 96 struct sgc_attach_args saa; 97 paddr_t pa; 98 void *va; 99 int slot, rv; 100 bus_space_tag_t bst; 101 bus_space_handle_t bsh; 102 103 sc = device_private(self); 104 sc->sc_dev = self; 105 aprint_normal("\n"); 106 107 bst = &sc->sc_tag; 108 memset(bst, 0, sizeof(struct bus_space_tag)); 109 bst->bustype = HP300_BUS_SPACE_SGC; 110 111 for (slot = 0; slot < SGC_NSLOTS; slot++) { 112 pa = sgc_slottopa(slot); 113 if (bus_space_map(bst, pa, PAGE_SIZE, 0, &bsh) != 0) { 114 aprint_error_dev(self, "can't map slot %d\n", slot); 115 continue; 116 } 117 va = bus_space_vaddr(bst, bsh); 118 119 /* Check for hardware. */ 120 rv = badaddr(va); 121 bus_space_unmap(bst, bsh, PAGE_SIZE); 122 123 if (rv != 0) { 124 DPRINTF(("%s: no valid device at slot %d\n", 125 device_xname(self), slot)); 126 continue; 127 } 128 129 memset(&saa, 0, sizeof(saa)); 130 saa.saa_iot = bst; 131 saa.saa_slot = slot; 132 133 /* Attach matching device. */ 134 config_found(self, &saa, sgcprint); 135 } 136} 137 138int 139sgcprint(void *aux, const char *pnp) 140{ 141 struct sgc_attach_args *saa = aux; 142 143 if (pnp) 144 aprint_normal("unknown SGC card at %s", pnp); 145 aprint_normal(" slot %d", saa->saa_slot); 146 return UNCONF; 147} 148 149/* 150 * Convert a slot number to a system physical address. 151 * This is needed for bus_space. 152 */ 153paddr_t 154sgc_slottopa(int slot) 155{ 156 paddr_t rval; 157 158 if (slot < 0 || slot >= SGC_NSLOTS) 159 rval = 0; 160 else 161 rval = SGC_BASE + (slot * SGC_DEVSIZE); 162 163 return rval; 164} 165