1 /* $NetBSD: puccn.c,v 1.3 2001/05/30 15:24:25 lukem Exp $ */ 2 3 /* 4 * Derived from pci.c 5 * Copyright (c) 2000 Geocast Networks Systems. All rights reserved. 6 * 7 * Copyright (c) 1995, 1996, 1997, 1998 8 * Christopher G. Demetriou. All rights reserved. 9 * Copyright (c) 1994 Charles M. Hannum. All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Charles M. Hannum. 22 * 4. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 38 /* 39 * Machine independent support for PCI serial console support. 40 * 41 * Scan the PCI bus for something which resembles a 16550 42 */ 43 44 #include "opt_kgdb.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/conf.h> 49 #include <sys/device.h> 50 51 #include <dev/pci/pcireg.h> 52 #include <dev/pci/pcivar.h> 53 #include <dev/pci/pcidevs.h> 54 55 #include <sys/termios.h> 56 #include <dev/ic/comreg.h> 57 #include <dev/ic/comvar.h> 58 59 #include <dev/cons.h> 60 61 #include <dev/pci/pucvar.h> 62 #include <dev/pci/puccn.h> 63 64 #ifndef CONSPEED 65 #define CONSPEED TTYDEF_SPEED 66 #endif 67 #ifndef CONMODE 68 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 69 #endif 70 71 #ifdef i386 /* Handle i386 directly */ 72 int 73 cpu_comcnprobe(struct consdev *cn, struct pci_attach_args *pa) 74 { 75 pci_mode_detect(); 76 pa->pa_iot = I386_BUS_SPACE_IO; 77 pa->pa_pc = 0; 78 pa->pa_tag = pci_make_tag(0, 0, 31, 0); 79 return 0; 80 } 81 #endif 82 83 cons_decl(com); 84 85 static bus_addr_t puccnbase; 86 static bus_space_tag_t puctag; 87 88 #ifdef KGDB 89 static bus_addr_t pucgdbbase; 90 #endif 91 92 /* 93 * Static dev/func variables allow pucprobe to be called multiple times, 94 * resuming the search where it left off, never retrying the same adaptor. 95 */ 96 97 static bus_addr_t 98 pucprobe_doit(struct consdev *cn) 99 { 100 struct pci_attach_args pa; 101 int bus; 102 static int dev = 0, func = 0; 103 int maxdev, nfunctions, i; 104 pcireg_t reg, bhlcr, subsys; 105 int foundport = 0; 106 const struct puc_device_description *desc; 107 pcireg_t base; 108 109 /* Fetch our tags */ 110 if (cpu_comcnprobe(cn, &pa) != 0) { 111 return 0; 112 } 113 puctag = pa.pa_iot; 114 pci_decompose_tag(pa.pa_pc, pa.pa_tag, &bus, &maxdev, NULL); 115 116 /* scan through devices */ 117 118 for (; dev <= maxdev ; dev++) { 119 pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, 0); 120 reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG); 121 if (PCI_VENDOR(reg) == PCI_VENDOR_INVALID 122 || PCI_VENDOR(reg) == 0) 123 continue; 124 bhlcr = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_BHLC_REG); 125 if (PCI_HDRTYPE_MULTIFN(bhlcr)) { 126 nfunctions = 8; 127 } else { 128 nfunctions = 1; 129 } 130 resume_scan: 131 for (; func < nfunctions; func++) { 132 pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, func); 133 reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_CLASS_REG); 134 if (PCI_CLASS(reg) == PCI_CLASS_COMMUNICATIONS 135 && PCI_SUBCLASS(reg) 136 == PCI_SUBCLASS_COMMUNICATIONS_SERIAL) { 137 pa.pa_id = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG); 138 subsys = pci_conf_read(pa.pa_pc, pa.pa_tag, 139 PCI_SUBSYS_ID_REG); 140 foundport = 1; 141 break; 142 } 143 } 144 if (foundport) 145 break; 146 147 func = 0; 148 } 149 if (!foundport) 150 return 0; 151 foundport = 0; 152 153 desc = puc_find_description(PCI_VENDOR(pa.pa_id), 154 PCI_PRODUCT(pa.pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 155 if (desc == NULL) { 156 func++; 157 goto resume_scan; 158 } 159 160 for (i = 0; PUC_PORT_VALID(desc, i); i++) 161 { 162 if (desc->ports[i].type != PUC_PORT_TYPE_COM) 163 continue; 164 base = pci_conf_read(pa.pa_pc, pa.pa_tag, desc->ports[i].bar); 165 base += desc->ports[i].offset; 166 167 if (PCI_MAPREG_TYPE(base) != PCI_MAPREG_TYPE_IO) 168 continue; 169 base = PCI_MAPREG_IO_ADDR(base); 170 if (com_is_console(puctag, base, NULL)) 171 continue; 172 foundport = 1; 173 break; 174 } 175 176 if (foundport == 0) { 177 func++; 178 goto resume_scan; 179 } 180 181 cn->cn_pri = CN_REMOTE; 182 return PCI_MAPREG_IO_ADDR(base); 183 } 184 185 #ifdef KGDB 186 void comgdbprobe(struct consdev *); 187 void comgdbinit(struct consdev *); 188 189 void 190 comgdbprobe(struct consdev *cn) 191 { 192 pucgdbbase = pucprobe_doit(cn); 193 } 194 195 void 196 comgdbinit(struct consdev *cn) 197 { 198 if (pucgdbbase == 0) { 199 return; 200 } 201 com_kgdb_attach(puctag, pucgdbbase, CONSPEED, COM_FREQ, CONMODE); 202 } 203 #endif 204 205 void 206 comcnprobe(struct consdev *cn) 207 { 208 puccnbase = pucprobe_doit(cn); 209 } 210 211 void 212 comcninit(struct consdev *cn) 213 { 214 if (puccnbase == 0) { 215 return; 216 } 217 comcnattach(puctag, puccnbase, CONSPEED, COM_FREQ, CONMODE); 218 } 219 220 /* comcngetc, comcnputc, comcnpollc provided by dev/ic/com.c */ 221