1 /* $NetBSD: puccn.c,v 1.2 2000/12/09 06:54:27 imp 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/param.h> 45 #include <sys/systm.h> 46 #include <sys/conf.h> 47 #include <sys/device.h> 48 49 #include <dev/pci/pcireg.h> 50 #include <dev/pci/pcivar.h> 51 #include <dev/pci/pcidevs.h> 52 53 #include <sys/termios.h> 54 #include <dev/ic/comreg.h> 55 #include <dev/ic/comvar.h> 56 57 #include <dev/cons.h> 58 59 #include <dev/pci/pucvar.h> 60 #include <dev/pci/puccn.h> 61 62 #ifndef CONSPEED 63 #define CONSPEED TTYDEF_SPEED 64 #endif 65 #ifndef CONMODE 66 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 67 #endif 68 69 #ifdef i386 /* Handle i386 directly */ 70 int 71 cpu_comcnprobe(struct consdev *cn, struct pci_attach_args *pa) 72 { 73 pci_mode_detect(); 74 pa->pa_iot = I386_BUS_SPACE_IO; 75 pa->pa_pc = 0; 76 pa->pa_tag = pci_make_tag(0, 0, 31, 0); 77 return 0; 78 } 79 #endif 80 81 cons_decl(com); 82 83 static bus_addr_t puccnbase; 84 static bus_space_tag_t puctag; 85 86 #ifdef KGDB 87 static bus_addr_t pucgdbbase; 88 #endif 89 90 /* 91 * Static dev/func variables allow pucprobe to be called multiple times, 92 * resuming the search where it left off, never retrying the same adaptor. 93 */ 94 95 static bus_addr_t 96 pucprobe_doit(struct consdev *cn) 97 { 98 struct pci_attach_args pa; 99 int bus; 100 static int dev = 0, func = 0; 101 int maxdev, nfunctions, i; 102 pcireg_t reg, bhlcr, subsys; 103 int foundport = 0; 104 const struct puc_device_description *desc; 105 pcireg_t base; 106 107 /* Fetch our tags */ 108 if (cpu_comcnprobe(cn, &pa) != 0) { 109 return 0; 110 } 111 puctag = pa.pa_iot; 112 pci_decompose_tag(pa.pa_pc, pa.pa_tag, &bus, &maxdev, NULL); 113 114 /* scan through devices */ 115 116 for (; dev <= maxdev ; dev++) { 117 pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, 0); 118 reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG); 119 if (PCI_VENDOR(reg) == PCI_VENDOR_INVALID 120 || PCI_VENDOR(reg) == 0) 121 continue; 122 bhlcr = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_BHLC_REG); 123 if (PCI_HDRTYPE_MULTIFN(bhlcr)) { 124 nfunctions = 8; 125 } else { 126 nfunctions = 1; 127 } 128 resume_scan: 129 for (; func < nfunctions; func++) { 130 pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, func); 131 reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_CLASS_REG); 132 if (PCI_CLASS(reg) == PCI_CLASS_COMMUNICATIONS 133 && PCI_SUBCLASS(reg) 134 == PCI_SUBCLASS_COMMUNICATIONS_SERIAL) { 135 pa.pa_id = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG); 136 subsys = pci_conf_read(pa.pa_pc, pa.pa_tag, 137 PCI_SUBSYS_ID_REG); 138 foundport = 1; 139 break; 140 } 141 } 142 if (foundport) 143 break; 144 145 func = 0; 146 } 147 if (!foundport) 148 return 0; 149 foundport = 0; 150 151 desc = puc_find_description(PCI_VENDOR(pa.pa_id), 152 PCI_PRODUCT(pa.pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); 153 if (desc == NULL) { 154 func++; 155 goto resume_scan; 156 } 157 158 for (i = 0; PUC_PORT_VALID(desc, i); i++) 159 { 160 if (desc->ports[i].type != PUC_PORT_TYPE_COM) 161 continue; 162 base = pci_conf_read(pa.pa_pc, pa.pa_tag, desc->ports[i].bar); 163 base += desc->ports[i].offset; 164 165 if (PCI_MAPREG_TYPE(base) != PCI_MAPREG_TYPE_IO) 166 continue; 167 base = PCI_MAPREG_IO_ADDR(base); 168 if (com_is_console(puctag, base, NULL)) 169 continue; 170 foundport = 1; 171 break; 172 } 173 174 if (foundport == 0) { 175 func++; 176 goto resume_scan; 177 } 178 179 cn->cn_pri = CN_REMOTE; 180 return PCI_MAPREG_IO_ADDR(base); 181 } 182 183 #ifdef KGDB 184 void comgdbprobe(struct consdev *); 185 void comgdbinit(struct consdev *); 186 187 void 188 comgdbprobe(struct consdev *cn) 189 { 190 pucgdbbase = pucprobe_doit(cn); 191 } 192 193 void 194 comgdbinit(struct consdev *cn) 195 { 196 if (pucgdbbase == 0) { 197 return; 198 } 199 com_kgdb_attach(puctag, pucgdbbase, CONSPEED, COM_FREQ, CONMODE); 200 } 201 #endif 202 203 void 204 comcnprobe(struct consdev *cn) 205 { 206 puccnbase = pucprobe_doit(cn); 207 } 208 209 void 210 comcninit(struct consdev *cn) 211 { 212 if (puccnbase == 0) { 213 return; 214 } 215 comcnattach(puctag, puccnbase, CONSPEED, COM_FREQ, CONMODE); 216 } 217 218 /* comcngetc, comcnputc, comcnpollc provided by dev/ic/com.c */ 219