ofw_console.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 /*-
    2  * Copyright (C) 2001 Benno Rice.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   18  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   20  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   21  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   22  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   23  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  */
   25 
   26 #include <sys/cdefs.h>
   27 __FBSDID("$FreeBSD: releng/9.0/sys/dev/ofw/ofw_console.c 225214 2011-08-27 14:24:27Z rwatson $");
   28 
   29 #include "opt_ofw.h"
   30 
   31 #include <sys/param.h>
   32 #include <sys/kdb.h>
   33 #include <sys/kernel.h>
   34 #include <sys/priv.h>
   35 #include <sys/systm.h>
   36 #include <sys/types.h>
   37 #include <sys/conf.h>
   38 #include <sys/cons.h>
   39 #include <sys/consio.h>
   40 #include <sys/tty.h>
   41 
   42 #include <dev/ofw/openfirm.h>
   43 
   44 #include <ddb/ddb.h>
   45 
   46 #ifndef OFWCONS_POLL_HZ
   47 #define OFWCONS_POLL_HZ 4       /* 50-100 works best on Ultra2 */
   48 #endif
   49 #define OFBURSTLEN      128     /* max number of bytes to write in one chunk */
   50 
   51 static tsw_open_t ofwtty_open;
   52 static tsw_close_t ofwtty_close;
   53 static tsw_outwakeup_t ofwtty_outwakeup;
   54 
   55 static struct ttydevsw ofw_ttydevsw = {
   56         .tsw_flags      = TF_NOPREFIX,
   57         .tsw_open       = ofwtty_open,
   58         .tsw_close      = ofwtty_close,
   59         .tsw_outwakeup  = ofwtty_outwakeup,
   60 };
   61 
   62 static int                      polltime;
   63 static struct callout_handle    ofw_timeouthandle
   64     = CALLOUT_HANDLE_INITIALIZER(&ofw_timeouthandle);
   65 
   66 #if defined(KDB)
   67 static int                      alt_break_state;
   68 #endif
   69 
   70 static void     ofw_timeout(void *);
   71 
   72 static cn_probe_t       ofw_cnprobe;
   73 static cn_init_t        ofw_cninit;
   74 static cn_term_t        ofw_cnterm;
   75 static cn_getc_t        ofw_cngetc;
   76 static cn_putc_t        ofw_cnputc;
   77 
   78 CONSOLE_DRIVER(ofw);
   79 
   80 static void
   81 cn_drvinit(void *unused)
   82 {
   83         phandle_t options;
   84         char output[32];
   85         struct tty *tp;
   86 
   87         if (ofw_consdev.cn_pri != CN_DEAD &&
   88             ofw_consdev.cn_name[0] != '\0') {
   89                 if ((options = OF_finddevice("/options")) == -1 ||
   90                     OF_getprop(options, "output-device", output,
   91                     sizeof(output)) == -1)
   92                         return;
   93                 /*
   94                  * XXX: This is a hack and it may result in two /dev/ttya
   95                  * XXX: devices on platforms where the sab driver works.
   96                  */
   97                 tp = tty_alloc(&ofw_ttydevsw, NULL);
   98                 tty_makedev(tp, NULL, "%s", output);
   99                 tty_makealias(tp, "ofwcons");
  100         }
  101 }
  102 
  103 SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL);
  104 
  105 static int      stdin;
  106 static int      stdout;
  107 
  108 static int
  109 ofwtty_open(struct tty *tp)
  110 {
  111         polltime = hz / OFWCONS_POLL_HZ;
  112         if (polltime < 1)
  113                 polltime = 1;
  114 
  115         ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
  116 
  117         return (0);
  118 }
  119 
  120 static void
  121 ofwtty_close(struct tty *tp)
  122 {
  123 
  124         /* XXX Should be replaced with callout_stop(9) */
  125         untimeout(ofw_timeout, tp, ofw_timeouthandle);
  126 }
  127 
  128 static void
  129 ofwtty_outwakeup(struct tty *tp)
  130 {
  131         int len;
  132         u_char buf[OFBURSTLEN];
  133 
  134         for (;;) {
  135                 len = ttydisc_getc(tp, buf, sizeof buf);
  136                 if (len == 0)
  137                         break;
  138                 OF_write(stdout, buf, len);
  139         }
  140 }
  141 
  142 static void
  143 ofw_timeout(void *v)
  144 {
  145         struct  tty *tp;
  146         int     c;
  147 
  148         tp = (struct tty *)v;
  149 
  150         tty_lock(tp);
  151         while ((c = ofw_cngetc(NULL)) != -1)
  152                 ttydisc_rint(tp, c, 0);
  153         ttydisc_rint_done(tp);
  154         tty_unlock(tp);
  155 
  156         ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
  157 }
  158 
  159 static void
  160 ofw_cnprobe(struct consdev *cp)
  161 {
  162         int chosen;
  163 
  164         if ((chosen = OF_finddevice("/chosen")) == -1) {
  165                 cp->cn_pri = CN_DEAD;
  166                 return;
  167         }
  168 
  169         if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
  170                 cp->cn_pri = CN_DEAD;
  171                 return;
  172         }
  173 
  174         if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) {
  175                 cp->cn_pri = CN_DEAD;
  176                 return;
  177         }
  178 
  179         cp->cn_pri = CN_LOW;
  180 }
  181 
  182 static void
  183 ofw_cninit(struct consdev *cp)
  184 {
  185 
  186         /* XXX: This is the alias, but that should be good enough */
  187         strcpy(cp->cn_name, "ofwcons");
  188 }
  189 
  190 static void
  191 ofw_cnterm(struct consdev *cp)
  192 {
  193 }
  194 
  195 static int
  196 ofw_cngetc(struct consdev *cp)
  197 {
  198         unsigned char ch;
  199 
  200         if (OF_read(stdin, &ch, 1) > 0) {
  201 #if defined(KDB)
  202                 kdb_alt_break(ch, &alt_break_state);
  203 #endif
  204                 return (ch);
  205         }
  206 
  207         return (-1);
  208 }
  209 
  210 static void
  211 ofw_cnputc(struct consdev *cp, int c)
  212 {
  213         char cbuf;
  214 
  215         if (c == '\n') {
  216                 cbuf = '\r';
  217                 OF_write(stdout, &cbuf, 1);
  218         }
  219 
  220         cbuf = c;
  221         OF_write(stdout, &cbuf, 1);
  222 }

Cache object: afcbc73fe21a165f7106da98c59d9532

[ 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/ofw/ofw_console.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ofw/ofw_console.c