1 /* $NetBSD: bandit.c,v 1.17 2001/09/14 21:04:58 nathanw Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Tsubai Masanari. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/device.h> 31 #include <sys/systm.h> 32 33 #include <dev/pci/pcivar.h> 34 #include <dev/ofw/openfirm.h> 35 #include <dev/ofw/ofw_pci.h> 36 37 #include <machine/autoconf.h> 38 39 struct bandit_softc { 40 struct device sc_dev; 41 struct pci_bridge sc_pc; 42 }; 43 44 void bandit_attach __P((struct device *, struct device *, void *)); 45 int bandit_match __P((struct device *, struct cfdata *, void *)); 46 int bandit_print __P((void *, const char *)); 47 48 pcireg_t bandit_conf_read __P((pci_chipset_tag_t, pcitag_t, int)); 49 void bandit_conf_write __P((pci_chipset_tag_t, pcitag_t, int, pcireg_t)); 50 51 static void bandit_init __P((struct bandit_softc *)); 52 53 struct cfattach bandit_ca = { 54 sizeof(struct bandit_softc), bandit_match, bandit_attach 55 }; 56 57 int 58 bandit_match(parent, cf, aux) 59 struct device *parent; 60 struct cfdata *cf; 61 void *aux; 62 { 63 struct confargs *ca = aux; 64 65 if (strcmp(ca->ca_name, "bandit") == 0 || 66 strcmp(ca->ca_name, "chaos") == 0) 67 return 1; 68 69 return 0; 70 } 71 72 void 73 bandit_attach(parent, self, aux) 74 struct device *parent, *self; 75 void *aux; 76 { 77 struct bandit_softc *sc = (void *)self; 78 pci_chipset_tag_t pc = &sc->sc_pc; 79 struct confargs *ca = aux; 80 struct pcibus_attach_args pba; 81 int len, node = ca->ca_node; 82 u_int32_t reg[2], busrange[2]; 83 struct ranges { 84 u_int32_t pci_hi, pci_mid, pci_lo; 85 u_int32_t host; 86 u_int32_t size_hi, size_lo; 87 } ranges[6], *rp = ranges; 88 89 printf("\n"); 90 91 /* Bandit address */ 92 if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8) 93 return; 94 95 /* PCI bus number */ 96 if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8) 97 return; 98 99 pc->node = node; 100 pc->addr = mapiodev(reg[0] + 0x800000, 4); 101 pc->data = mapiodev(reg[0] + 0xc00000, 8); 102 pc->bus = busrange[0]; 103 pc->conf_read = bandit_conf_read; 104 pc->conf_write = bandit_conf_write; 105 pc->memt = (bus_space_tag_t)0; 106 107 /* find i/o tag */ 108 len = OF_getprop(node, "ranges", ranges, sizeof(ranges)); 109 if (len == -1) 110 return; 111 while (len >= sizeof(ranges[0])) { 112 if ((rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) == 113 OFW_PCI_PHYS_HI_SPACE_IO) 114 pc->iot = (bus_space_tag_t)rp->host; 115 len -= sizeof(ranges[0]); 116 rp++; 117 } 118 119 bandit_init(sc); 120 121 memset(&pba, 0, sizeof(pba)); 122 pba.pba_busname = "pci"; 123 pba.pba_memt = pc->memt; 124 pba.pba_iot = pc->iot; 125 pba.pba_dmat = &pci_bus_dma_tag; 126 pba.pba_bus = pc->bus; 127 pba.pba_pc = pc; 128 pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED; 129 130 config_found(self, &pba, bandit_print); 131 } 132 133 int 134 bandit_print(aux, pnp) 135 void *aux; 136 const char *pnp; 137 { 138 struct pcibus_attach_args *pa = aux; 139 140 if (pnp) 141 printf("%s at %s", pa->pba_busname, pnp); 142 printf(" bus %d", pa->pba_bus); 143 return UNCONF; 144 } 145 146 pcireg_t 147 bandit_conf_read(pc, tag, reg) 148 pci_chipset_tag_t pc; 149 pcitag_t tag; 150 int reg; 151 { 152 pcireg_t data; 153 int bus, dev, func, s; 154 u_int32_t x; 155 156 pci_decompose_tag(pc, tag, &bus, &dev, &func); 157 158 /* 159 * bandit's minimum device number of the first bus is 11. 160 * So we behave as if there is no device when dev < 11. 161 */ 162 if (func > 7) 163 panic("pci_conf_read: func > 7"); 164 165 if (bus == pc->bus) { 166 if (dev < 11) 167 return 0xffffffff; 168 x = (1 << dev) | (func << 8) | reg; 169 } else 170 x = tag | reg | 1; 171 172 s = splhigh(); 173 174 out32rb(pc->addr, x); 175 DELAY(10); 176 data = 0xffffffff; 177 if (!badaddr(pc->data, 4)) 178 data = in32rb(pc->data); 179 DELAY(10); 180 out32rb(pc->addr, 0); 181 DELAY(10); 182 183 splx(s); 184 185 return data; 186 } 187 188 void 189 bandit_conf_write(pc, tag, reg, data) 190 pci_chipset_tag_t pc; 191 pcitag_t tag; 192 int reg; 193 pcireg_t data; 194 { 195 int bus, dev, func, s; 196 u_int32_t x; 197 198 pci_decompose_tag(pc, tag, &bus, &dev, &func); 199 200 if (func > 7) 201 panic("pci_conf_write: func > 7"); 202 203 if (bus == pc->bus) { 204 if (dev < 11) 205 panic("pci_conf_write: dev < 11"); 206 x = (1 << dev) | (func << 8) | reg; 207 } else 208 x = tag | reg | 1; 209 210 s = splhigh(); 211 212 out32rb(pc->addr, x); 213 DELAY(10); 214 out32rb(pc->data, data); 215 DELAY(10); 216 out32rb(pc->addr, 0); 217 DELAY(10); 218 219 splx(s); 220 } 221 222 #define PCI_BANDIT 11 223 224 #define PCI_REG_MODE_SELECT 0x50 225 226 #define PCI_MODE_IO_COHERENT 0x040 /* I/O coherent */ 227 228 void 229 bandit_init(sc) 230 struct bandit_softc *sc; 231 { 232 pci_chipset_tag_t pc = &sc->sc_pc; 233 pcitag_t tag; 234 u_int mode; 235 236 tag = pci_make_tag(pc, pc->bus, PCI_BANDIT, 0); 237 if ((pci_conf_read(pc, tag, PCI_ID_REG) & 0xffff) == 0xffff) 238 return; 239 240 mode = pci_conf_read(pc, tag, PCI_REG_MODE_SELECT); 241 242 if ((mode & PCI_MODE_IO_COHERENT) == 0) { 243 mode |= PCI_MODE_IO_COHERENT; 244 pci_conf_write(pc, tag, PCI_REG_MODE_SELECT, mode); 245 } 246 } 247