1 /* $NetBSD: puccn.c,v 1.11 2013/07/22 13:40:36 soren 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 <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: puccn.c,v 1.11 2013/07/22 13:40:36 soren Exp $"); 46 47 #include "opt_kgdb.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/conf.h> 52 #include <sys/device.h> 53 54 #include <dev/pci/pcireg.h> 55 #include <dev/pci/pcivar.h> 56 #include <dev/pci/pcidevs.h> 57 58 #include <sys/termios.h> 59 #include <dev/ic/comreg.h> 60 #include <dev/ic/comvar.h> 61 62 #include <dev/cons.h> 63 64 #include <dev/pci/pucvar.h> 65 #include <dev/pci/puccn.h> 66 67 #ifndef CONSPEED 68 #define CONSPEED TTYDEF_SPEED 69 #endif 70 #ifndef CONMODE 71 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 72 #endif 73 74 cons_decl(com); 75 76 static bus_addr_t puccnbase; 77 static bus_space_tag_t puctag; 78 79 #ifdef KGDB 80 static bus_addr_t pucgdbbase; 81 #endif 82 83 /* 84 * Static dev/func variables allow pucprobe to be called multiple times, 85 * resuming the search where it left off, never retrying the same adaptor. 86 */ 87 88 static bus_addr_t 89 pucprobe_doit(struct consdev *cn) 90 { 91 struct pci_attach_args pa; 92 int bus; 93 static int dev = 0, func = 0; 94 int maxdev, nfunctions = 0, i; /* XXX */ 95 pcireg_t reg, bhlcr, subsys = 0; /* XXX */ 96 int foundport = 0; 97 const struct puc_device_description *desc; 98 pcireg_t base; 99 100 /* Fetch our tags */ 101 #if defined(amd64) || defined(i386) 102 if (cpu_comcnprobe(cn, &pa) != 0) 103 #endif 104 return 0; 105 106 puctag = pa.pa_iot; 107 pci_decompose_tag(pa.pa_pc, pa.pa_tag, &bus, &maxdev, NULL); 108 109 /* scan through devices */ 110 111 for (; dev <= maxdev ; dev++) { 112 pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, 0); 113 reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG); 114 if (PCI_VENDOR(reg) == PCI_VENDOR_INVALID 115 || PCI_VENDOR(reg) == 0) 116 continue; 117 bhlcr = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_BHLC_REG); 118 if (PCI_HDRTYPE_MULTIFN(bhlcr)) { 119 nfunctions = 8; 120 } else { 121 nfunctions = 1; 122 } 123 resume_scan: 124 for (; func < nfunctions; func++) { 125 pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, func); 126 reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_CLASS_REG); 127 if (PCI_CLASS(reg) == PCI_CLASS_COMMUNICATIONS 128 && PCI_SUBCLASS(reg) 129 == PCI_SUBCLASS_COMMUNICATIONS_SERIAL) { 130 pa.pa_id = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG); 131 subsys = pci_conf_read(pa.pa_pc, pa.pa_tag, 132 PCI_SUBSYS_ID_REG); 133 foundport = 1; 134 break; 135 } 136 } 137 if (foundport) 138 break; 139 140 func = 0; 141 } 142 if (!foundport) 143 return 0; 144 foundport = 0; 145 146 desc = puc_find_description(PCI_VENDOR(pa.pa_id), 147 PCI_PRODUCT(pa.pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 148 if (desc == NULL) { 149 func++; 150 goto resume_scan; 151 } 152 153 for (i = 0; PUC_PORT_VALID(desc, i); i++) 154 { 155 if (desc->ports[i].type != PUC_PORT_TYPE_COM) 156 continue; 157 base = pci_conf_read(pa.pa_pc, pa.pa_tag, desc->ports[i].bar); 158 base += desc->ports[i].offset; 159 160 if (PCI_MAPREG_TYPE(base) != PCI_MAPREG_TYPE_IO) 161 continue; 162 base = PCI_MAPREG_IO_ADDR(base); 163 if (com_is_console(puctag, base, NULL)) 164 continue; 165 foundport = 1; 166 break; 167 } 168 169 if (foundport == 0) { 170 func++; 171 goto resume_scan; 172 } 173 174 cn->cn_pri = CN_REMOTE; 175 return PCI_MAPREG_IO_ADDR(base); 176 } 177 178 #ifdef KGDB 179 void comgdbprobe(struct consdev *); 180 void comgdbinit(struct consdev *); 181 182 void 183 comgdbprobe(struct consdev *cn) 184 { 185 pucgdbbase = pucprobe_doit(cn); 186 } 187 188 void 189 comgdbinit(struct consdev *cn) 190 { 191 if (pucgdbbase == 0) { 192 return; 193 } 194 com_kgdb_attach(puctag, pucgdbbase, CONSPEED, COM_FREQ, 195 COM_TYPE_NORMAL, CONMODE); 196 } 197 #endif 198 199 void 200 comcnprobe(struct consdev *cn) 201 { 202 puccnbase = pucprobe_doit(cn); 203 } 204 205 void 206 comcninit(struct consdev *cn) 207 { 208 if (puccnbase == 0) { 209 return; 210 } 211 comcnattach(puctag, puccnbase, CONSPEED, COM_FREQ, COM_TYPE_NORMAL, 212 CONMODE); 213 } 214 215 /* comcngetc, comcnputc, comcnpollc provided by dev/ic/com.c */ 216