1 /* $NetBSD: isa_machdep.c,v 1.15 2012/10/27 17:18:03 chs 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 * 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: isa_machdep.c,v 1.15 2012/10/27 17:18:03 chs Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 #include <sys/malloc.h> 39 #include <sys/queue.h> 40 41 #include <machine/sysconf.h> 42 #include <machine/autoconf.h> 43 #include <machine/mainboard.h> 44 #include <machine/bus.h> 45 46 #include <dev/isa/isavar.h> 47 #include <dev/isa/isareg.h> 48 49 static int mipscoisabusprint(void *, const char *); 50 static int isabusmatch(device_t, cfdata_t, void *); 51 static void isabusattach(device_t, device_t, void *); 52 53 struct isabus_softc { 54 struct mipsco_isa_chipset sc_isa_ic; 55 }; 56 57 CFATTACH_DECL_NEW(isabus, sizeof(struct isabus_softc), 58 isabusmatch, isabusattach, NULL, NULL); 59 60 extern struct cfdriver isabus_cd; 61 62 static struct mipsco_bus_space isa_io_bst, isa_mem_bst, isa_ctl_bst; 63 static struct mipsco_bus_dma_tag isa_dmatag; 64 65 static void isa_bus_space_init(struct mipsco_bus_space *, const char *, 66 paddr_t, size_t); 67 int isa_intr(void *); 68 69 70 int 71 isabusmatch(device_t parent, cfdata_t cfp, void *aux) 72 { 73 struct confargs *ca = aux; 74 75 if (strcmp(ca->ca_name, isabus_cd.cd_name) != 0) 76 return 0; 77 return 1; 78 } 79 80 static void 81 isa_bus_space_init(struct mipsco_bus_space *bst, const char *type, paddr_t paddr, size_t len) 82 { 83 vaddr_t vaddr = MIPS_PHYS_TO_KSEG1(paddr); /* XXX */ 84 85 /* Setup default bus_space */ 86 mipsco_bus_space_init(bst, type, paddr, vaddr, 0x0, len); 87 88 /* ISA bus maps 1 word for every byte, therefore stride = 2 */ 89 mipsco_bus_space_set_aligned_stride(bst, 2); 90 91 /* 92 * ISA bus will do an automatic byte swap, but when accessing 93 * memory using bus_space_stream functions we need to byte swap 94 * to reverse the one performed in hardware 95 */ 96 bst->bs_bswap = 1; 97 98 bst->bs_intr_establish = (void *)isa_intr_establish; 99 100 printf(" %s %p", type, (void *)vaddr); 101 } 102 103 104 void 105 isabusattach(device_t parent, device_t self, void *aux) 106 { 107 struct isabus_softc *sc = device_private(self); 108 struct mipsco_isa_chipset *ic = &sc->sc_isa_ic; 109 struct isabus_attach_args iba; 110 111 printf(":"); 112 113 iba.iba_iot = &isa_io_bst; 114 iba.iba_memt = &isa_mem_bst; 115 iba.iba_dmat = &isa_dmatag; 116 iba.iba_ic = ic; 117 118 isa_bus_space_init(&isa_io_bst, "isa_io", PIZAZZ_ISA_IOBASE, 119 PIZAZZ_ISA_IOSIZE); 120 121 isa_bus_space_init(&isa_mem_bst, "isa_mem", PIZAZZ_ISA_MEMBASE, 122 PIZAZZ_ISA_MEMSIZE); 123 124 isa_bus_space_init(&isa_ctl_bst, "isa_intr", PIZAZZ_ISA_INTRLATCH, 125 sizeof(u_int32_t)); 126 127 _bus_dma_tag_init(&isa_dmatag); 128 129 ic->ic_bst = &isa_ctl_bst; 130 131 if (bus_space_map(ic->ic_bst, 0x00000, sizeof(u_int32_t), 132 BUS_SPACE_MAP_LINEAR, &ic->ic_bsh) != 0) { 133 printf(": can't map intrreg\n"); 134 return; 135 } 136 137 /* Clear ISA interrupt latch */ 138 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 139 140 evcnt_attach_dynamic(&ic->ic_intrcnt, EVCNT_TYPE_INTR, NULL, 141 device_xname(self), "intr"); 142 143 LIST_INIT(&ic->intr_q); 144 (*platform.intr_establish)(SYS_INTR_ATBUS, isa_intr, ic); 145 146 printf("\n"); 147 config_found_ia(self, "isabus", &iba, mipscoisabusprint); 148 } 149 150 int 151 mipscoisabusprint(void *aux, const char *name) 152 { 153 if (name == NULL) 154 return UNCONF; 155 return QUIET; 156 } 157 158 void 159 isa_attach_hook(device_t parent, device_t self, struct isabus_attach_args *iba) 160 { 161 } 162 163 void 164 isa_detach_hook(isa_chipset_tag_t ic, device_t self) 165 { 166 } 167 168 const struct evcnt * 169 isa_intr_evcnt(isa_chipset_tag_t ic, int irq) 170 { 171 /* XXX for now, no evcnt parent reported */ 172 return NULL; 173 } 174 175 void * 176 isa_intr_establish(isa_chipset_tag_t ic, int intr, int type, int level, int (*ih_fun)(void*), void *ih_arg) 177 /* type: XXX not yet */ 178 /* level: XXX not yet */ 179 { 180 struct mipsco_intrhand *ih; 181 182 ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT); 183 if (ih == NULL) 184 panic("isa_intr_establish: malloc failed"); 185 186 ih->ih_fun = ih_fun; 187 ih->ih_arg = ih_arg; 188 LIST_INSERT_HEAD(&ic->intr_q, ih, ih_q); 189 return ih; 190 } 191 192 void 193 isa_intr_disestablish(isa_chipset_tag_t ic, void *cookie) 194 { 195 struct mipsco_intrhand *ih = cookie; 196 197 LIST_REMOVE(ih, ih_q); 198 free(ih, M_DEVBUF); 199 } 200 201 int 202 isa_intr_alloc(isa_chipset_tag_t ic, int mask, int type, int *irq) 203 { 204 return 0; 205 } 206 207 int 208 isa_intr(void *arg) 209 { 210 struct mipsco_isa_chipset *ic = (struct mipsco_isa_chipset *)arg; 211 struct mipsco_intrhand *ih; 212 int rv, handled; 213 214 ic->ic_intrcnt.ev_count++; 215 216 handled = 0; 217 LIST_FOREACH(ih, &ic->intr_q, ih_q) { 218 /* 219 * The handler returns one of three values: 220 * 0: This interrupt wasn't for me. 221 * 1: This interrupt was for me. 222 * -1: This interrupt might have been for me, but I can't say 223 * for sure. 224 */ 225 rv = (*ih->ih_fun)(ih->ih_arg); 226 handled |= (rv != 0); 227 } 228 229 /* Clear ISA interrupt latch */ 230 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 231 232 return handled; 233 } 234