pchb.c revision 1.13
1 /* $NetBSD: pchb.c,v 1.13 2020/07/06 09:34:17 rin 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 1.13 2020/07/06 09:34:17 rin 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/extent.h> 46 #include <sys/malloc.h> 47 48 #define _IBM4XX_BUS_DMA_PRIVATE 49 50 #include <powerpc/ibm4xx/ibm405gp.h> 51 #include <powerpc/ibm4xx/pci_machdep.h> 52 #include <powerpc/ibm4xx/dev/plbvar.h> 53 54 #include <dev/pci/pcivar.h> 55 #include <dev/pci/pcireg.h> 56 #include <dev/pci/pcidevs.h> 57 #include <dev/pci/pciconf.h> 58 59 static int pchbmatch(device_t, cfdata_t, void *); 60 static void pchbattach(device_t, device_t, void *); 61 static int pchbprint(void *, const char *); 62 63 CFATTACH_DECL_NEW(pchb, 0, 64 pchbmatch, pchbattach, NULL, NULL); 65 66 static int pcifound = 0; 67 68 /* IO window located @ e8000000 and maps to 0-0xffff */ 69 static struct powerpc_bus_space pchb_io_tag = { 70 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_IO_TYPE, 71 IBM405GP_PLB_PCI_IO_START, /* offset */ 72 IBM405GP_PCI_PCI_IO_START, /* extent base */ 73 IBM405GP_PCI_PCI_IO_START + 0xffff, /* extent limit */ 74 }; 75 76 /* PCI memory window is directly mapped */ 77 static struct powerpc_bus_space pchb_mem_tag = { 78 _BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE, 79 0x00000000, /* offset */ 80 IBM405GP_PCI_MEM_START, /* extent base */ 81 IBM405GP_PCI_MEM_START + 0x1fffffff, /* extent limit */ 82 }; 83 84 85 static int 86 pchbmatch(device_t parent, cfdata_t cf, void *aux) 87 { 88 struct plb_attach_args *paa = aux; 89 /* XXX chipset tag unused by walnut, so just pass 0 */ 90 pci_chipset_tag_t pc = ibm4xx_get_pci_chipset_tag(); 91 pcitag_t tag; 92 int class, id; 93 94 /* match only pchb devices */ 95 if (strcmp(paa->plb_name, cf->cf_name) != 0) 96 return 0; 97 98 ibm4xx_pci_machdep_init(); 99 tag = pci_make_tag(pc, 0, 0, 0); 100 101 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 102 id = pci_conf_read(pc, tag, PCI_ID_REG); 103 104 /* 105 * Match all known PCI host chipsets. 106 */ 107 if (PCI_CLASS(class) == PCI_CLASS_BRIDGE && 108 PCI_SUBCLASS(class) == PCI_SUBCLASS_BRIDGE_HOST) { 109 switch (PCI_VENDOR(id)) { 110 case PCI_VENDOR_IBM: 111 switch (PCI_PRODUCT(id)) { 112 case PCI_PRODUCT_IBM_405GP: 113 return (!pcifound); 114 } 115 break; 116 } 117 } 118 return (0); 119 } 120 121 static void 122 pchbattach(device_t parent, device_t self, void *aux) 123 { 124 struct plb_attach_args *paa = aux; 125 struct pcibus_attach_args pba; 126 char devinfo[256]; 127 #ifdef PCI_CONFIGURE_VERBOSE 128 extern int pci_conf_debug; 129 130 pci_conf_debug = 1; 131 #endif 132 pci_chipset_tag_t pc = ibm4xx_get_pci_chipset_tag(); 133 pcitag_t tag; 134 int class, id; 135 136 ibm4xx_pci_machdep_init(); 137 tag = pci_make_tag(pc, 0, 0, 0); 138 139 class = pci_conf_read(pc, tag, PCI_CLASS_REG); 140 id = pci_conf_read(pc, tag, PCI_ID_REG); 141 142 aprint_normal("\n"); 143 pcifound++; 144 /* 145 * All we do is print out a description. Eventually, we 146 * might want to add code that does something that's 147 * possibly chipset-specific. 148 */ 149 150 pci_devinfo(id, class, 0, devinfo, sizeof(devinfo)); 151 aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo, 152 PCI_REVISION(class)); 153 154 ibm4xx_pci_machdep_init(); /* Redundant... */ 155 ibm4xx_setup_pci(); 156 #ifdef PCI_CONFIGURE_VERBOSE 157 ibm4xx_show_pci_map(); 158 #endif 159 160 if (bus_space_init(&pchb_io_tag, "pchbio", NULL, 0)) 161 panic("pchbattach: can't init IO tag"); 162 if (bus_space_init(&pchb_mem_tag, "pchbmem", NULL, 0)) 163 panic("pchbattach: can't init MEM tag"); 164 165 #ifdef PCI_NETBSD_CONFIGURE 166 struct extent *memext = extent_create("pcimem", 167 IBM405GP_PCI_MEM_START, 168 IBM405GP_PCI_MEM_START + 0x1fffffff, NULL, 0, 169 EX_WAITOK); 170 struct extent *ioext = extent_create("pciio", 171 IBM405GP_PCI_PCI_IO_START, 172 IBM405GP_PCI_PCI_IO_START + 0xffff, NULL, 0, EX_WAITOK); 173 pci_configure_bus(pc, ioext, memext, NULL, 0, 32); 174 extent_destroy(ioext); 175 extent_destroy(memext); 176 #endif /* PCI_NETBSD_CONFIGURE */ 177 178 #ifdef PCI_CONFIGURE_VERBOSE 179 printf("running config_found PCI\n"); 180 #endif 181 /* IO window located @ e8000000 and maps to 0-0xffff */ 182 pba.pba_iot = &pchb_io_tag; 183 /* PCI memory window is directly mapped */ 184 pba.pba_memt = &pchb_mem_tag; 185 pba.pba_dmat = paa->plb_dmat; 186 pba.pba_dmat64 = NULL; 187 pba.pba_pc = pc; 188 pba.pba_bus = 0; 189 pba.pba_bridgetag = NULL; 190 pba.pba_flags = PCI_FLAGS_MEM_OKAY | PCI_FLAGS_IO_OKAY; 191 config_found_ia(self, "pcibus", &pba, pchbprint); 192 } 193 194 195 static int 196 pchbprint(void *aux, const char *p) 197 { 198 199 if (p == NULL) 200 return (UNCONF); 201 return (QUIET); 202 } 203 204 #if 0 205 static void 206 scan_pci_bus(void) 207 { 208 pci_chipset_tag_t pc = ibm4xx_get_pci_chipset_tag(); 209 pcitag_t tag; 210 int i, x; 211 212 for (i=0;i<32;i++){ 213 tag = pci_make_tag(pc, 0, i, 0); 214 x = pci_conf_read(pc, tag, 0); 215 printf("%d tag=%08x : %08x\n", i, tag, x); 216 #if 0 217 if (PCI_VENDOR(x) == PCI_VENDOR_INTEL 218 && PCI_PRODUCT(x) == PCI_PRODUCT_INTEL_80960_RP) { 219 /* Do not configure PCI bus analyzer */ 220 continue; 221 } 222 x = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 223 x |= PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE | PCI_COMMAND_MASTER_ENABLE; 224 pci_conf_write(0, tag, PCI_COMMAND_STATUS_REG, x); 225 #endif 226 } 227 } 228 #endif 229
Indexes created Tue Sep 30 11:09:46 GMT 2025