1 /* $NetBSD: isa_machdep.c,v 1.2 2001/04/02 09:54:16 wdk Exp $ */ 2 3 /* 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wayne Knowles 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/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/malloc.h> 43 #include <sys/queue.h> 44 45 #include <machine/sysconf.h> 46 #include <machine/autoconf.h> 47 #include <machine/mainboard.h> 48 #include <machine/bus.h> 49 50 #include <dev/isa/isavar.h> 51 #include <dev/isa/isareg.h> 52 53 static int isabusprint __P((void *auxp, const char *)); 54 static int isabusmatch __P((struct device *, struct cfdata *, void *)); 55 static void isabusattach __P((struct device *, struct device *, void *)); 56 57 struct isabus_softc { 58 struct device sc_dev; 59 struct mipsco_isa_chipset sc_isa_ic; 60 }; 61 62 struct cfattach isabus_ca = { 63 sizeof(struct isabus_softc), isabusmatch, isabusattach 64 }; 65 66 extern struct cfdriver isabus_cd; 67 68 static struct mipsco_bus_space isa_io_bst, isa_mem_bst, isa_ctl_bst; 69 static struct mipsco_bus_dma_tag isa_dmatag; 70 71 static void isa_bus_space_init __P((struct mipsco_bus_space *, const char *, 72 paddr_t, size_t)); 73 int isa_intr __P((void *)); 74 75 76 int 77 isabusmatch(pdp, cfp, aux) 78 struct device *pdp; 79 struct cfdata *cfp; 80 void *aux; 81 { 82 struct confargs *ca = aux; 83 84 if (strcmp(ca->ca_name, isabus_cd.cd_name) != 0) 85 return 0; 86 return 1; 87 } 88 89 static void 90 isa_bus_space_init(bst, type, paddr, len) 91 struct mipsco_bus_space *bst; 92 const char *type; 93 paddr_t paddr; 94 size_t len; 95 { 96 vaddr_t vaddr = MIPS_PHYS_TO_KSEG1(paddr); /* XXX */ 97 98 /* Setup default bus_space */ 99 mipsco_bus_space_init(bst, type, paddr, vaddr, 0x0, len); 100 101 /* ISA bus maps 1 word for every byte, therefore stride = 2 */ 102 mipsco_bus_space_set_aligned_stride(bst, 2); 103 104 /* 105 * ISA bus will do an automatic byte swap, but when accessing 106 * memory using bus_space_stream functions we need to byte swap 107 * to reverse the one performed in hardware 108 */ 109 bst->bs_bswap = 1; 110 111 bst->bs_intr_establish = (void *)isa_intr_establish; 112 113 printf(" %s %p", type, (void *)vaddr); 114 } 115 116 117 void 118 isabusattach(pdp, dp, aux) 119 struct device *pdp, *dp; 120 void *aux; 121 { 122 struct isabus_softc *sc = (struct isabus_softc *)dp; 123 struct mipsco_isa_chipset *ic = &sc->sc_isa_ic; 124 struct isabus_attach_args iba; 125 126 printf(":"); 127 128 iba.iba_busname = "isa"; 129 iba.iba_iot = &isa_io_bst; 130 iba.iba_memt = &isa_mem_bst; 131 iba.iba_dmat = &isa_dmatag; 132 iba.iba_ic = ic; 133 134 isa_bus_space_init(&isa_io_bst, "isa_io", PIZAZZ_ISA_IOBASE, 135 PIZAZZ_ISA_IOSIZE); 136 137 isa_bus_space_init(&isa_mem_bst, "isa_mem", PIZAZZ_ISA_MEMBASE, 138 PIZAZZ_ISA_MEMSIZE); 139 140 isa_bus_space_init(&isa_ctl_bst, "isa_intr", PIZAZZ_ISA_INTRLATCH, 141 sizeof(u_int32_t)); 142 143 _bus_dma_tag_init(&isa_dmatag); 144 145 ic->ic_bst = &isa_ctl_bst; 146 147 if (bus_space_map(ic->ic_bst, 0x00000, sizeof(u_int32_t), 148 BUS_SPACE_MAP_LINEAR, &ic->ic_bsh) != 0) { 149 printf(": can't map intrreg\n"); 150 return; 151 } 152 153 /* Clear ISA interrupt latch */ 154 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 155 156 evcnt_attach_dynamic(&ic->ic_intrcnt, EVCNT_TYPE_INTR, NULL, 157 dp->dv_xname, "intr"); 158 159 LIST_INIT(&ic->intr_q); 160 (*platform.intr_establish)(SYS_INTR_ATBUS, isa_intr, ic); 161 162 printf("\n"); 163 config_found(dp, &iba, isabusprint); 164 } 165 166 int 167 isabusprint(auxp, name) 168 void *auxp; 169 const char *name; 170 { 171 if(name == NULL) 172 return(UNCONF); 173 return(QUIET); 174 } 175 176 void 177 isa_attach_hook(parent, self, iba) 178 struct device *parent, *self; 179 struct isabus_attach_args *iba; 180 { 181 } 182 183 const struct evcnt * 184 isa_intr_evcnt(isa_chipset_tag_t ic, int irq) 185 { 186 /* XXX for now, no evcnt parent reported */ 187 return NULL; 188 } 189 190 void * 191 isa_intr_establish(ic, intr, type, level, ih_fun, ih_arg) 192 isa_chipset_tag_t ic; 193 int intr; 194 int type; /* XXX not yet */ 195 int level; /* XXX not yet */ 196 int (*ih_fun) __P((void*)); 197 void *ih_arg; 198 { 199 struct mipsco_intrhand *ih; 200 201 ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT); 202 if (ih == NULL) 203 panic("isa_intr_establish: malloc failed"); 204 205 ih->ih_fun = ih_fun; 206 ih->ih_arg = ih_arg; 207 LIST_INSERT_HEAD(&ic->intr_q, ih, ih_q); 208 return ih; 209 } 210 211 void 212 isa_intr_disestablish(ic, cookie) 213 isa_chipset_tag_t ic; 214 void *cookie; 215 { 216 struct mipsco_intrhand *ih = cookie; 217 218 LIST_REMOVE(ih, ih_q); 219 free(ih, M_DEVBUF); 220 } 221 222 int 223 isa_intr_alloc(ic, mask, type, irq) 224 isa_chipset_tag_t ic; 225 int mask; 226 int type; 227 int *irq; 228 { 229 return 0; 230 } 231 232 int 233 isa_intr(arg) 234 void *arg; 235 { 236 struct mipsco_isa_chipset *ic = (struct mipsco_isa_chipset *)arg; 237 struct mipsco_intrhand *ih; 238 int rv, handled; 239 240 ic->ic_intrcnt.ev_count++; 241 242 handled = 0; 243 LIST_FOREACH(ih, &ic->intr_q, ih_q) { 244 /* 245 * The handler returns one of three values: 246 * 0: This interrupt wasn't for me. 247 * 1: This interrupt was for me. 248 * -1: This interrupt might have been for me, but I can't say 249 * for sure. 250 */ 251 rv = (*ih->ih_fun)(ih->ih_arg); 252 handled |= (rv != 0); 253 } 254 255 /* Clear ISA interrupt latch */ 256 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 257 258 return handled; 259 } 260