pchb.c revision 1.16
1 /* $NetBSD: pchb.c,v 1.16 2021/08/07 16:19:03 thorpej 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 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: pchb.c,v 1.16 2021/08/07 16:19:03 thorpej Exp $"); 34 35 #include "pci.h" 36 37 #ifdef _KERNEL_OPT 38 #include "opt_pci.h" 39 #endif 40 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 47 #define _IBM4XX_BUS_DMA_PRIVATE 48 49 #include <powerpc/ibm4xx/ibm405gp.h> 50 #include <powerpc/ibm4xx/pci_machdep.h> 51 #include <powerpc/ibm4xx/dev/plbvar.h> 52 53 #include <dev/pci/pcivar.h> 54 #include <dev/pci/pcireg.h> 55 #include <dev/pci/pcidevs.h> 56 #include <dev/pci/pciconf.h> 57 58 static int pchbmatch(device_t, cfdata_t, void *); 59 static void pchbattach(device_t, device_t, void *); 60 static int pchbprint(void *, const char *); 61 62 CFATTACH_DECL_NEW(pchb, 0, 63 pchbmatch, pchbattach, NULL, NULL); 64 65 static int pcifound = 0; 66 67 /* IO window located @ e8000000 and maps to 0-0xffff */ 68 static struct powerpc_bus_space pchb_io_tag = { 69 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_IO_TYPE, 70 IBM405GP_PLB_PCI_IO_START, /* offset */ 71 IBM405GP_PCI_PCI_IO_START, /* extent base */ 72 IBM405GP_PCI_PCI_IO_START + 0xffff, /* extent limit */ 73 }; 74 75 /* PCI memory window is directly mapped */ 76 static struct powerpc_bus_space pchb_mem_tag = { 77 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE, 78 0x00000000, /* offset */ 79 IBM405GP_PCI_MEM_START, /* extent base */ 80 IBM405GP_PCI_MEM_START + 0x1fffffff, /* extent limit */ 81 }; 82 83 84 static int 85 pchbmatch(device_t parent, cfdata_t cf, void *aux) 86 { 87 struct plb_attach_args *paa = aux; 88 /* XXX chipset tag unused by walnut, so just pass 0 */ 89 pci_chipset_tag_t pc = ibm4xx_get_pci_chipset_tag(); 90 pcitag_t tag; 91 int class, id; 92 93 /* match only pchb devices */ 94 if (strcmp(paa->plb_name, cf->cf_name) != 0) 95 return 0; 96 97 ibm4xx_pci_machdep_init(); 98 tag = pci_make_tag(pc, 0, 0, 0); 99 100 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 101 id = pci_conf_read(pc, tag, PCI_ID_REG); 102 103 /* 104 * Match all known PCI host chipsets. 105 */ 106 if (PCI_CLASS(class) == PCI_CLASS_BRIDGE && 107 PCI_SUBCLASS(class) == PCI_SUBCLASS_BRIDGE_HOST) { 108 switch (PCI_VENDOR(id)) { 109 case PCI_VENDOR_IBM: 110 switch (PCI_PRODUCT(id)) { 111 case PCI_PRODUCT_IBM_405GP: 112 return (!pcifound); 113 } 114 break; 115 } 116 } 117 return (0); 118 } 119 120 static void 121 pchbattach(device_t parent, device_t self, void *aux) 122 { 123 struct plb_attach_args *paa = aux; 124 struct pcibus_attach_args pba; 125 char devinfo[256]; 126 #ifdef PCI_CONFIGURE_VERBOSE 127 extern int pci_conf_debug; 128 129 pci_conf_debug = 1; 130 #endif 131 pci_chipset_tag_t pc = ibm4xx_get_pci_chipset_tag(); 132 pcitag_t tag; 133 int class, id; 134 135 ibm4xx_pci_machdep_init(); 136 tag = pci_make_tag(pc, 0, 0, 0); 137 138 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 139 id = pci_conf_read(pc, tag, PCI_ID_REG); 140 141 aprint_normal("\n"); 142 pcifound++; 143 /* 144 * All we do is print out a description. Eventually, we 145 * might want to add code that does something that's 146 * possibly chipset-specific. 147 */ 148 149 pci_devinfo(id, class, 0, devinfo, sizeof(devinfo)); 150 aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo, 151 PCI_REVISION(class)); 152 153 ibm4xx_pci_machdep_init(); /* Redundant... */ 154 ibm4xx_setup_pci(); 155 #ifdef PCI_CONFIGURE_VERBOSE 156 ibm4xx_show_pci_map(); 157 #endif 158 159 if (bus_space_init(&pchb_io_tag, "pchbio", NULL, 0)) 160 panic("pchbattach: can't init IO tag"); 161 if (bus_space_init(&pchb_mem_tag, "pchbmem", NULL, 0)) 162 panic("pchbattach: can't init MEM tag"); 163 164 #ifdef PCI_NETBSD_CONFIGURE 165 struct pciconf_resources *pcires = pciconf_resource_init(); 166 167 pciconf_resource_add(pcires, PCICONF_RESOURCE_IO, 168 IBM405GP_PCI_PCI_IO_START, 0x10000); 169 pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM, 170 IBM405GP_PCI_MEM_START, 0x20000000); 171 172 pci_configure_bus(pc, pcires, 0, 32); 173 pciconf_resource_fini(pcires); 174 #endif /* PCI_NETBSD_CONFIGURE */ 175 176 #ifdef PCI_CONFIGURE_VERBOSE 177 printf("running config_found PCI\n"); 178 #endif 179 /* IO window located @ e8000000 and maps to 0-0xffff */ 180 pba.pba_iot = &pchb_io_tag; 181 /* PCI memory window is directly mapped */ 182 pba.pba_memt = &pchb_mem_tag; 183 pba.pba_dmat = paa->plb_dmat; 184 pba.pba_dmat64 = NULL; 185 pba.pba_pc = pc; 186 pba.pba_bus = 0; 187 pba.pba_bridgetag = NULL; 188 pba.pba_flags = PCI_FLAGS_MEM_OKAY | PCI_FLAGS_IO_OKAY; 189 config_found(self, &pba, pchbprint, CFARGS_NONE); 190 } 191 192 193 static int 194 pchbprint(void *aux, const char *p) 195 { 196 197 if (p == NULL) 198 return (UNCONF); 199 return (QUIET); 200 } 201 202 #if 0 203 static void 204 scan_pci_bus(void) 205 { 206 pci_chipset_tag_t pc = ibm4xx_get_pci_chipset_tag(); 207 pcitag_t tag; 208 int i, x; 209 210 for (i=0;i<32;i++){ 211 tag = pci_make_tag(pc, 0, i, 0); 212 x = pci_conf_read(pc, tag, 0); 213 printf("%d tag=%08x : %08x\n", i, tag, x); 214 #if 0 215 if (PCI_VENDOR(x) == PCI_VENDOR_INTEL 216 && PCI_PRODUCT(x) == PCI_PRODUCT_INTEL_80960_RP) { 217 /* Do not configure PCI bus analyzer */ 218 continue; 219 } 220 x = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 221 x |= PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE | PCI_COMMAND_MASTER_ENABLE; 222 pci_conf_write(0, tag, PCI_COMMAND_STATUS_REG, x); 223 #endif 224 } 225 } 226 #endif 227
Indexes created Tue Sep 30 11:09:46 GMT 2025