| 1 | /* $NetBSD: puccn.c,v 1.14 2014/03/05 05:56:04 msaitoh 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 1.14 2014/03/05 05:56:04 msaitoh 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 | static int puccnflags; |
| 79 | |
| 80 | #ifdef KGDB |
| 81 | static bus_addr_t pucgdbbase; |
| 82 | #endif |
| 83 | |
| 84 | /* |
| 85 | * Static dev/func variables allow pucprobe to be called multiple times, |
| 86 | * resuming the search where it left off, never retrying the same adaptor. |
| 87 | */ |
| 88 | |
| 89 | static bus_addr_t |
| 90 | pucprobe_doit(struct consdev *cn) |
| 91 | { |
| 92 | struct pci_attach_args pa; |
| 93 | int bus; |
| 94 | static int dev = 0, func = 0; |
| 95 | int maxdev, nfunctions = 0, i; /* XXX */ |
| 96 | pcireg_t reg, bhlcr, subsys = 0; /* XXX */ |
| 97 | int foundport = 0; |
| 98 | const struct puc_device_description *desc; |
| 99 | pcireg_t base; |
| 100 | |
| 101 | /* Fetch our tags */ |
| 102 | #if defined(amd64) || defined(i386) |
| 103 | if (cpu_puc_cnprobe(cn, &pa) != 0) |
| 104 | #endif |
| 105 | return 0; |
| 106 | |
| 107 | pci_decompose_tag(pa.pa_pc, pa.pa_tag, &bus, &maxdev, NULL); |
| 108 | |
| 109 | /* Scan through devices and find a communication class device. */ |
| 110 | for (; dev <= maxdev ; dev++) { |
| 111 | pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, 0); |
| 112 | reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG); |
| 113 | if (PCI_VENDOR(reg) == PCI_VENDOR_INVALID |
| 114 | || PCI_VENDOR(reg) == 0) |
| 115 | continue; |
| 116 | bhlcr = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_BHLC_REG); |
| 117 | if (PCI_HDRTYPE_MULTIFN(bhlcr)) { |
| 118 | nfunctions = 8; |
| 119 | } else { |
| 120 | nfunctions = 1; |
| 121 | } |
| 122 | resume_scan: |
| 123 | for (; func < nfunctions; func++) { |
| 124 | pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, func); |
| 125 | reg = pci_conf_read(pa.pa_pc, pa.pa_tag, |
| 126 | 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, |
| 131 | PCI_ID_REG); |
| 132 | subsys = pci_conf_read(pa.pa_pc, pa.pa_tag, |
| 133 | PCI_SUBSYS_ID_REG); |
| 134 | foundport = 1; |
| 135 | break; |
| 136 | } |
| 137 | } |
| 138 | if (foundport) |
| 139 | break; |
| 140 | |
| 141 | func = 0; |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * If all devices was scanned and couldn't find any communication |
| 146 | * device, return with 0. |
| 147 | */ |
| 148 | if (!foundport) |
| 149 | return 0; |
| 150 | |
| 151 | /* Clear foundport flag */ |
| 152 | foundport = 0; |
| 153 | |
| 154 | /* Check whether the device is in the puc device table or not */ |
| 155 | desc = puc_find_description(PCI_VENDOR(pa.pa_id), |
| 156 | PCI_PRODUCT(pa.pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys)); |
| 157 | |
| 158 | /* If not, check the next communication device */ |
| 159 | if (desc == NULL) { |
| 160 | /* Resume from the next function */ |
| 161 | func++; |
| 162 | goto resume_scan; |
| 163 | } |
| 164 | |
| 165 | /* |
| 166 | * We found a device and it's on the puc table. Set the tag and |
| 167 | * the base address. |
| 168 | */ |
| 169 | for (i = 0; PUC_PORT_VALID(desc, i); i++) { |
| 170 | if (desc->ports[i].type != PUC_PORT_TYPE_COM) |
| 171 | continue; |
| 172 | puccnflags = desc->ports[i].flags; |
| 173 | base = pci_conf_read(pa.pa_pc, pa.pa_tag, desc->ports[i].bar); |
| 174 | base += desc->ports[i].offset; |
| 175 | |
| 176 | if (PCI_MAPREG_TYPE(base) == PCI_MAPREG_TYPE_IO) { |
| 177 | puctag = pa.pa_iot; |
| 178 | base = PCI_MAPREG_IO_ADDR(base); |
| 179 | } |
| 180 | #if 0 /* For MMIO device */ |
| 181 | else { |
| 182 | puctag = pa.pa_memt; |
| 183 | base = PCI_MAPREG_MEM_ADDR(base); |
| 184 | } |
| 185 | #endif |
| 186 | |
| 187 | if (com_is_console(puctag, base, NULL)) |
| 188 | continue; |
| 189 | foundport = 1; |
| 190 | break; |
| 191 | } |
| 192 | |
| 193 | if (foundport == 0) { |
| 194 | func++; |
| 195 | goto resume_scan; |
| 196 | } |
| 197 | |
| 198 | #if 0 |
| 199 | cn->cn_pri = CN_REMOTE; |
| 200 | #else |
| 201 | if (cn) |
| 202 | cn->cn_pri = CN_REMOTE; |
| 203 | #endif |
| 204 | return base; |
| 205 | } |
| 206 | |
| 207 | #ifdef KGDB |
| 208 | void |
| 209 | puc_gdbprobe(struct consdev *cn) |
| 210 | { |
| 211 | |
| 212 | pucgdbbase = pucprobe_doit(cn); |
| 213 | } |
| 214 | |
| 215 | void |
| 216 | puc_gdbinit(struct consdev *cn) |
| 217 | { |
| 218 | |
| 219 | if (pucgdbbase == 0) |
| 220 | return; |
| 221 | |
| 222 | com_kgdb_attach(puctag, pucgdbbase, CONSPEED, COM_FREQ, |
| 223 | COM_TYPE_NORMAL, CONMODE); |
| 224 | } |
| 225 | #endif |
| 226 | |
| 227 | void |
| 228 | puc_cnprobe(struct consdev *cn) |
| 229 | { |
| 230 | |
| 231 | puccnbase = pucprobe_doit(cn); |
| 232 | } |
| 233 | |
| 234 | int |
| 235 | puc_cninit(struct consdev *cn) |
| 236 | { |
| 237 | |
| 238 | if (puccnbase == 0) |
| 239 | return -1; |
| 240 | |
| 241 | return comcnattach(puctag, puccnbase, CONSPEED, |
| 242 | puccnflags & PUC_COM_CLOCKMASK, COM_TYPE_NORMAL, |
| 243 | CONMODE); |
| 244 | } |
| 245 | |
| 246 | /* comcngetc, comcnputc, comcnpollc provided by dev/ic/com.c */ |
| 247 | |