puccn.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*      $NetBSD: puccn.c,v 1.6 2003/06/14 17:01:06 thorpej 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 1.6 2003/06/14 17:01:06 thorpej 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 #ifdef i386             /* Handle i386 directly */
   75 int
   76 cpu_comcnprobe(struct consdev *cn, struct pci_attach_args *pa)
   77 {
   78         pci_mode_detect();
   79         pa->pa_iot = X86_BUS_SPACE_IO;
   80         pa->pa_pc = 0;
   81         pa->pa_tag = pci_make_tag(0, 0, 31, 0);
   82         return 0;
   83 }
   84 #endif
   85 
   86 cons_decl(com);
   87 
   88 static bus_addr_t puccnbase;
   89 static bus_space_tag_t puctag;
   90 
   91 #ifdef KGDB
   92 static bus_addr_t pucgdbbase;
   93 #endif
   94 
   95 /*
   96  * Static dev/func variables allow pucprobe to be called multiple times,
   97  * resuming the search where it left off, never retrying the same adaptor.
   98  */
   99 
  100 static bus_addr_t
  101 pucprobe_doit(struct consdev *cn)
  102 {
  103         struct pci_attach_args pa;
  104         int bus;
  105         static int dev = 0, func = 0;
  106         int maxdev, nfunctions, i;
  107         pcireg_t reg, bhlcr, subsys;
  108         int foundport = 0;
  109         const struct puc_device_description *desc;
  110         pcireg_t base;
  111 
  112         /* Fetch our tags */
  113         if (cpu_comcnprobe(cn, &pa) != 0) {
  114                 return 0;
  115         }
  116         puctag = pa.pa_iot;
  117         pci_decompose_tag(pa.pa_pc, pa.pa_tag, &bus, &maxdev, NULL);
  118 
  119         /* scan through devices */
  120 
  121         for (; dev <= maxdev ; dev++) {
  122                 pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, 0);
  123                 reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG);
  124                 if (PCI_VENDOR(reg) == PCI_VENDOR_INVALID
  125                     || PCI_VENDOR(reg) == 0)
  126                         continue;
  127                 bhlcr = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_BHLC_REG);
  128                 if (PCI_HDRTYPE_MULTIFN(bhlcr)) {
  129                         nfunctions = 8;
  130                 } else {
  131                         nfunctions = 1;
  132                 }
  133 resume_scan:
  134                 for (; func < nfunctions; func++)  {
  135                         pa.pa_tag = pci_make_tag(pa.pa_pc, bus, dev, func);
  136                         reg = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_CLASS_REG);
  137                         if (PCI_CLASS(reg)  == PCI_CLASS_COMMUNICATIONS
  138                             && PCI_SUBCLASS(reg)
  139                                == PCI_SUBCLASS_COMMUNICATIONS_SERIAL) {
  140                                 pa.pa_id = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG);
  141                                 subsys = pci_conf_read(pa.pa_pc, pa.pa_tag,
  142                                     PCI_SUBSYS_ID_REG);
  143                                 foundport = 1;
  144                                 break;
  145                         }
  146                 }
  147                 if (foundport)
  148                         break;
  149 
  150                 func = 0;
  151         }
  152         if (!foundport)
  153                 return 0;
  154         foundport = 0;
  155 
  156         desc = puc_find_description(PCI_VENDOR(pa.pa_id),
  157             PCI_PRODUCT(pa.pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys));
  158         if (desc == NULL) {
  159                 func++;
  160                 goto resume_scan;
  161         }
  162 
  163         for (i = 0; PUC_PORT_VALID(desc, i); i++)
  164         {
  165                 if (desc->ports[i].type != PUC_PORT_TYPE_COM)
  166                         continue;
  167                 base = pci_conf_read(pa.pa_pc, pa.pa_tag, desc->ports[i].bar);
  168                 base += desc->ports[i].offset;
  169 
  170                 if (PCI_MAPREG_TYPE(base) != PCI_MAPREG_TYPE_IO)
  171                         continue;
  172                 base = PCI_MAPREG_IO_ADDR(base);
  173                 if (com_is_console(puctag, base, NULL))
  174                         continue;
  175                 foundport = 1;
  176                 break;
  177         }
  178                 
  179         if (foundport == 0) {
  180                 func++;
  181                 goto resume_scan;
  182         }
  183 
  184         cn->cn_pri = CN_REMOTE;
  185         return PCI_MAPREG_IO_ADDR(base);
  186 }
  187 
  188 #ifdef KGDB
  189 void comgdbprobe(struct consdev *);
  190 void comgdbinit(struct consdev *);
  191 
  192 void
  193 comgdbprobe(struct consdev *cn)
  194 {
  195         pucgdbbase = pucprobe_doit(cn);
  196 }
  197 
  198 void
  199 comgdbinit(struct consdev *cn)
  200 {
  201         if (pucgdbbase == 0) {
  202                 return;
  203         }
  204         com_kgdb_attach(puctag, pucgdbbase, CONSPEED, COM_FREQ,
  205             COM_TYPE_NORMAL, CONMODE);
  206 }
  207 #endif
  208 
  209 void
  210 comcnprobe(struct consdev *cn)
  211 {
  212         puccnbase = pucprobe_doit(cn);
  213 }
  214 
  215 void
  216 comcninit(struct consdev *cn)
  217 {
  218         if (puccnbase == 0) {
  219                 return;
  220         }
  221         comcnattach(puctag, puccnbase, CONSPEED, COM_FREQ, COM_TYPE_NORMAL,
  222             CONMODE);
  223 }
  224 
  225 /* comcngetc, comcnputc, comcnpollc provided by dev/ic/com.c */

Cache object: 2f1109cd16f75302e6c6ee10f6a9121f

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/dev/pci/puccn.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/puccn.c