pchb.c revision 1.7
1 /* $NetBSD: pchb.c,v 1.7 2011/05/17 17:34:52 dyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: pchb.c,v 1.7 2011/05/17 17:34:52 dyoung Exp $"); 33 34 #include "pci.h" 35 #include "opt_pci.h" 36 37 #include <sys/types.h> 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 #include <sys/extent.h> 42 #include <sys/malloc.h> 43 44 #define _IBM4XX_BUS_DMA_PRIVATE 45 46 #include <powerpc/ibm4xx/ibm405gp.h> 47 #include <powerpc/ibm4xx/dev/plbvar.h> 48 49 #include <dev/pci/pcivar.h> 50 #include <dev/pci/pcireg.h> 51 #include <dev/pci/pcidevs.h> 52 #include <dev/pci/pciconf.h> 53 54 static int pchbmatch(struct device *, struct cfdata *, void *); 55 static void pchbattach(struct device *, struct device *, void *); 56 static int pchbprint(void *, const char *); 57 static pci_chipset_tag_t alloc_chipset_tag(int); 58 59 CFATTACH_DECL(pchb, sizeof(struct device), 60 pchbmatch, pchbattach, NULL, NULL); 61 62 static int pcifound = 0; 63 64 /* IO window located @ e8000000 and maps to 0-0xffff */ 65 static struct powerpc_bus_space pchb_io_tag = { 66 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_IO_TYPE, 67 IBM405GP_PLB_PCI_IO_START, /* offset */ 68 IBM405GP_PCI_PCI_IO_START, /* extent base */ 69 IBM405GP_PCI_PCI_IO_START + 0xffff, /* extent limit */ 70 }; 71 72 /* PCI memory window is directly mapped */ 73 static struct powerpc_bus_space pchb_mem_tag = { 74 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE, 75 0x00000000, /* offset */ 76 IBM405GP_PCI_MEM_START, /* extent base */ 77 IBM405GP_PCI_MEM_START + 0x1fffffff, /* extent limit */ 78 }; 79 80 81 static int 82 pchbmatch(struct device *parent, struct cfdata *cf, void *aux) 83 { 84 struct plb_attach_args *paa = aux; 85 /* XXX chipset tag unused by walnut, so just pass 0 */ 86 pci_chipset_tag_t pc = alloc_chipset_tag(0); 87 pcitag_t tag; 88 int class, id; 89 90 /* match only pchb devices */ 91 if (strcmp(paa->plb_name, cf->cf_name) != 0) 92 return 0; 93 94 pci_machdep_init(); 95 tag = pci_make_tag(pc, 0, 0, 0); 96 97 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 98 id = pci_conf_read(pc, tag, PCI_ID_REG); 99 100 /* 101 * Match all known PCI host chipsets. 102 */ 103 if (PCI_CLASS(class) == PCI_CLASS_BRIDGE && 104 PCI_SUBCLASS(class) == PCI_SUBCLASS_BRIDGE_HOST) { 105 switch (PCI_VENDOR(id)) { 106 case PCI_VENDOR_IBM: 107 switch (PCI_PRODUCT(id)) { 108 case PCI_PRODUCT_IBM_405GP: 109 return (!pcifound); 110 } 111 break; 112 } 113 } 114 return (0); 115 } 116 117 static void 118 pchbattach(struct device *parent, struct device *self, void *aux) 119 { 120 struct plb_attach_args *paa = aux; 121 struct pcibus_attach_args pba; 122 char devinfo[256]; 123 #ifdef PCI_CONFIGURE_VERBOSE 124 extern int pci_conf_debug; 125 126 pci_conf_debug = 1; 127 #endif 128 pci_chipset_tag_t pc = alloc_chipset_tag(0); 129 pcitag_t tag; 130 int class, id; 131 132 pci_machdep_init(); 133 tag = pci_make_tag(pc, 0, 0, 0); 134 135 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 136 id = pci_conf_read(pc, tag, PCI_ID_REG); 137 138 printf("\n"); 139 pcifound++; 140 /* 141 * All we do is print out a description. Eventually, we 142 * might want to add code that does something that's 143 * possibly chipset-specific. 144 */ 145 146 pci_devinfo(id, class, 0, devinfo, sizeof(devinfo)); 147 printf("%s: %s (rev. 0x%02x)\n", self->dv_xname, devinfo, 148 PCI_REVISION(class)); 149 150 pci_machdep_init(); /* Redundant... */ 151 ibm4xx_setup_pci(); 152 #ifdef PCI_CONFIGURE_VERBOSE 153 ibm4xx_show_pci_map(); 154 #endif 155 156 if (bus_space_init(&pchb_io_tag, "pchbio", NULL, 0)) 157 panic("pchbattach: can't init IO tag"); 158 if (bus_space_init(&pchb_mem_tag, "pchbmem", NULL, 0)) 159 panic("pchbattach: can't init MEM tag"); 160 161 #ifdef PCI_NETBSD_CONFIGURE 162 pc->memext = extent_create("pcimem", IBM405GP_PCI_MEM_START, 163 IBM405GP_PCI_MEM_START + 0x1fffffff, M_DEVBUF, NULL, 0, 164 EX_NOWAIT); 165 pc->ioext = extent_create("pciio", IBM405GP_PCI_PCI_IO_START, 166 IBM405GP_PCI_PCI_IO_START + 0xffff, M_DEVBUF, NULL, 0, EX_NOWAIT); 167 pci_configure_bus(pc, pc->ioext, pc->memext, NULL, 0, 32); 168 #endif /* PCI_NETBSD_CONFIGURE */ 169 170 #ifdef PCI_CONFIGURE_VERBOSE 171 printf("running config_found PCI\n"); 172 #endif 173 /* IO window located @ e8000000 and maps to 0-0xffff */ 174 pba.pba_iot = &pchb_io_tag; 175 /* PCI memory window is directly mapped */ 176 pba.pba_memt = &pchb_mem_tag; 177 pba.pba_dmat = paa->plb_dmat; 178 pba.pba_dmat64 = NULL; 179 pba.pba_pc = pc; 180 pba.pba_bus = 0; 181 pba.pba_bridgetag = NULL; 182 pba.pba_flags = PCI_FLAGS_MEM_OKAY | PCI_FLAGS_IO_OKAY; 183 config_found_ia(self, "pcibus", &pba, pchbprint); 184 } 185 186 187 static int 188 pchbprint(void *aux, const char *p) 189 { 190 191 if (p == NULL) 192 return (UNCONF); 193 return (QUIET); 194 } 195 196 #if 0 197 static void 198 scan_pci_bus(void) 199 { 200 pcitag_t tag; 201 int i, x; 202 203 for (i=0;i<32;i++){ 204 tag = pci_make_tag(0, 0, i, 0); 205 x = pci_conf_read(0, tag, 0); 206 printf("%d tag=%08x : %08x\n", i, tag, x); 207 #if 0 208 if (PCI_VENDOR(x) == PCI_VENDOR_INTEL 209 && PCI_PRODUCT(x) == PCI_PRODUCT_INTEL_80960_RP) { 210 /* Do not configure PCI bus analyzer */ 211 continue; 212 } 213 x = pci_conf_read(0, tag, PCI_COMMAND_STATUS_REG); 214 x |= PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE | PCI_COMMAND_MASTER_ENABLE; 215 pci_conf_write(0, tag, PCI_COMMAND_STATUS_REG, x); 216 #endif 217 } 218 } 219 #endif 220 221 static pci_chipset_tag_t 222 alloc_chipset_tag(int node) 223 { 224 pci_chipset_tag_t npc; 225 226 npc = malloc(sizeof *npc, M_DEVBUF, M_NOWAIT); 227 if (npc == NULL) 228 panic("could not allocate pci_chipset_tag_t"); 229 npc->rootnode = node; 230 231 return (npc); 232 } 233
Indexes created Tue Sep 30 11:09:46 GMT 2025