1 /* $NetBSD: bandit.c,v 1.35 2022/01/21 19:12:28 thorpej 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/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: bandit.c,v 1.35 2022/01/21 19:12:28 thorpej Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/device.h> 34 #include <sys/systm.h> 35 36 #include <dev/pci/pcivar.h> 37 #include <dev/ofw/openfirm.h> 38 #include <dev/ofw/ofw_pci.h> 39 40 #include <machine/autoconf.h> 41 #include <machine/pci_machdep.h> 42 #include <machine/pio.h> 43 44 struct bandit_softc { 45 device_t sc_dev; 46 struct genppc_pci_chipset sc_pc; 47 struct powerpc_bus_space sc_iot; 48 struct powerpc_bus_space sc_memt; 49 boolean_t sc_is_chaos; 50 }; 51 52 static void bandit_attach(device_t, device_t, void *); 53 static int bandit_match(device_t, cfdata_t, void *); 54 55 static pcireg_t bandit_conf_read(void *, pcitag_t, int); 56 static void bandit_conf_write(void *, pcitag_t, int, pcireg_t); 57 static void chaos_conf_write(void *, pcitag_t, int, pcireg_t); 58 59 static void bandit_init(struct bandit_softc *); 60 61 CFATTACH_DECL_NEW(bandit, sizeof(struct bandit_softc), 62 bandit_match, bandit_attach, NULL, NULL); 63 64 static int 65 bandit_match(device_t parent, cfdata_t cf, void *aux) 66 { 67 struct confargs *ca = aux; 68 69 if (strcmp(ca->ca_name, "bandit") == 0 || 70 strcmp(ca->ca_name, "chaos") == 0) 71 return 1; 72 73 return 0; 74 } 75 76 static void 77 bandit_attach(device_t parent, device_t self, void *aux) 78 { 79 struct bandit_softc *sc = device_private(self); 80 pci_chipset_tag_t pc = &sc->sc_pc; 81 struct confargs *ca = aux; 82 struct pcibus_attach_args pba; 83 int len, node = ca->ca_node; 84 uint32_t reg[2], busrange[2]; 85 struct range { 86 uint32_t pci_hi, pci_mid, pci_lo; 87 uint32_t host; 88 uint32_t size_hi, size_lo; 89 } ranges[6], *rp = ranges; 90 91 aprint_normal("\n"); 92 sc->sc_dev = self; 93 94 sc->sc_is_chaos = (strcmp(ca->ca_name, "chaos") == 0); 95 96 /* Bandit address */ 97 if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8) 98 return; 99 100 /* PCI bus number */ 101 if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8) 102 return; 103 104 /* find i/o tag */ 105 len = OF_getprop(node, "ranges", ranges, sizeof(ranges)); 106 if (len == -1) 107 return; 108 while (len >= sizeof(ranges[0])) { 109 if ((rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) == 110 OFW_PCI_PHYS_HI_SPACE_IO) { 111 sc->sc_iot.pbs_base = rp->host; 112 sc->sc_iot.pbs_limit = rp->host + rp->size_lo; 113 break; 114 } 115 len -= sizeof(ranges[0]); 116 rp++; 117 } 118 memset(&sc->sc_iot, 0, sizeof(struct powerpc_bus_space)); 119 memset(&sc->sc_memt, 0, sizeof(struct powerpc_bus_space)); 120 sc->sc_iot.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE; 121 if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_IO, node, &sc->sc_iot, 122 "bandit io-space") != 0) 123 panic("Can't init bandit io tag"); 124 125 sc->sc_memt.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE; 126 if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_MEM, node, &sc->sc_memt, 127 "bandit mem-space") != 0) 128 panic("Can't init bandit mem tag"); 129 130 macppc_pci_get_chipset_tag(pc); 131 pc->pc_node = node; 132 pc->pc_iot = &sc->sc_iot; 133 pc->pc_memt = &sc->sc_memt; 134 pc->pc_addr = mapiodev(reg[0] + 0x800000, 4, false); 135 pc->pc_data = mapiodev(reg[0] + 0xc00000, 8, false); 136 pc->pc_bus = busrange[0]; 137 pc->pc_conf_read = bandit_conf_read; 138 if (sc->sc_is_chaos) { 139 pc->pc_conf_write = chaos_conf_write; 140 } else 141 pc->pc_conf_write = bandit_conf_write; 142 143 bandit_init(sc); 144 145 memset(&pba, 0, sizeof(pba)); 146 pba.pba_memt = pc->pc_memt; 147 pba.pba_iot = pc->pc_iot; 148 pba.pba_dmat = &pci_bus_dma_tag; 149 pba.pba_dmat64 = NULL; 150 pba.pba_bus = pc->pc_bus; 151 pba.pba_bridgetag = NULL; 152 pba.pba_pc = pc; 153 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY; 154 155 config_found(self, &pba, pcibusprint, 156 CFARGS(.devhandle = device_handle(self))); 157 } 158 159 static pcireg_t 160 bandit_conf_read(void *cookie, pcitag_t tag, int reg) 161 { 162 pci_chipset_tag_t pc = cookie; 163 pcireg_t data; 164 int bus, dev, func, s; 165 uint32_t x; 166 167 if ((unsigned int)reg >= PCI_CONF_SIZE) 168 return (pcireg_t) -1; 169 170 pci_decompose_tag(pc, tag, &bus, &dev, &func); 171 172 /* 173 * bandit's minimum device number of the first bus is 11. 174 * So we behave as if there is no device when dev < 11. 175 */ 176 if (func > 7) 177 panic("pci_conf_read: func > 7"); 178 179 if (bus == pc->pc_bus) { 180 if (dev < 11) 181 return 0xffffffff; 182 x = (1 << dev) | (func << 8) | reg; 183 } else 184 x = tag | reg | 1; 185 186 s = splhigh(); 187 188 out32rb(pc->pc_addr, x); 189 DELAY(10); 190 data = 0xffffffff; 191 if (!badaddr(pc->pc_data, 4)) 192 data = in32rb(pc->pc_data); 193 DELAY(10); 194 out32rb(pc->pc_addr, 0); 195 DELAY(10); 196 197 splx(s); 198 199 return data; 200 } 201 202 static void 203 bandit_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data) 204 { 205 pci_chipset_tag_t pc = cookie; 206 int bus, dev, func, s; 207 u_int32_t x; 208 209 if ((unsigned int)reg >= PCI_CONF_SIZE) 210 return; 211 212 pci_decompose_tag(pc, tag, &bus, &dev, &func); 213 214 if (func > 7) 215 panic("pci_conf_write: func > 7"); 216 217 if (bus == pc->pc_bus) { 218 if (dev < 11) 219 panic("pci_conf_write: dev < 11"); 220 x = (1 << dev) | (func << 8) | reg; 221 } else 222 x = tag | reg | 1; 223 224 s = splhigh(); 225 226 out32rb(pc->pc_addr, x); 227 DELAY(10); 228 out32rb(pc->pc_data, data); 229 DELAY(10); 230 out32rb(pc->pc_addr, 0); 231 DELAY(10); 232 233 splx(s); 234 } 235 236 /* 237 * XXX 238 * /chaos really hates writes to config space, so we just don't do them 239 */ 240 static void 241 chaos_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data) 242 { 243 } 244 245 #define PCI_BANDIT 11 246 247 #define PCI_REG_MODE_SELECT 0x50 248 249 #define PCI_MODE_IO_COHERENT 0x040 /* I/O coherent */ 250 251 static void 252 bandit_init(struct bandit_softc *sc) 253 { 254 pci_chipset_tag_t pc = &sc->sc_pc; 255 pcitag_t tag; 256 u_int mode; 257 258 tag = pci_make_tag(pc, pc->pc_bus, PCI_BANDIT, 0); 259 if ((pci_conf_read(pc, tag, PCI_ID_REG) & 0xffff) == 0xffff) 260 return; 261 262 mode = pci_conf_read(pc, tag, PCI_REG_MODE_SELECT); 263 264 if ((mode & PCI_MODE_IO_COHERENT) == 0) { 265 mode |= PCI_MODE_IO_COHERENT; 266 pci_conf_write(pc, tag, PCI_REG_MODE_SELECT, mode); 267 } 268 } 269
Indexes created Sun Sep 21 20:09:37 GMT 2025