227 lines
4.6 KiB
C
227 lines
4.6 KiB
C
/*-
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* Copyright (c) 2007 Bruce M. Simpson.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kdb.h>
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#include <sys/kernel.h>
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#include <sys/priv.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/conf.h>
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#include <sys/cons.h>
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#include <sys/consio.h>
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#include <sys/tty.h>
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#include <dev/cfe/cfe_api.h>
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#include <dev/cfe/cfe_error.h>
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#include <ddb/ddb.h>
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#ifndef CFECONS_POLL_HZ
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#define CFECONS_POLL_HZ 4
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#endif
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#define CFEBURSTLEN 128 /* max number of bytes to write in one chunk */
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static tsw_open_t cfe_tty_open;
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static tsw_close_t cfe_tty_close;
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static tsw_outwakeup_t cfe_tty_outwakeup;
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static struct ttydevsw cfe_ttydevsw = {
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.tsw_flags = TF_NOPREFIX,
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.tsw_open = cfe_tty_open,
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.tsw_close = cfe_tty_close,
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.tsw_outwakeup = cfe_tty_outwakeup,
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};
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static int conhandle = -1;
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/* XXX does cfe have to poll? */
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static int polltime;
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static struct callout cfe_timer;
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#if defined(KDB)
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static int alt_break_state;
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#endif
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static void cfe_timeout(void *);
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static cn_probe_t cfe_cnprobe;
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static cn_init_t cfe_cninit;
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static cn_term_t cfe_cnterm;
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static cn_getc_t cfe_cngetc;
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static cn_putc_t cfe_cnputc;
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static cn_grab_t cfe_cngrab;
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static cn_ungrab_t cfe_cnungrab;
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CONSOLE_DRIVER(cfe);
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static void
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cn_drvinit(void *unused)
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{
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struct tty *tp;
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if (cfe_consdev.cn_pri != CN_DEAD &&
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cfe_consdev.cn_name[0] != '\0') {
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tp = tty_alloc(&cfe_ttydevsw, NULL);
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callout_init_mtx(&cfe_timer, tty_getlock(tp), 0);
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tty_makedev(tp, NULL, "cfecons");
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}
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}
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static int
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cfe_tty_open(struct tty *tp)
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{
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polltime = hz / CFECONS_POLL_HZ;
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if (polltime < 1)
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polltime = 1;
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callout_reset(&cfe_timer, polltime, cfe_timeout, tp);
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return (0);
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}
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static void
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cfe_tty_close(struct tty *tp)
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{
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callout_stop(&cfe_timer);
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}
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static void
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cfe_tty_outwakeup(struct tty *tp)
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{
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int len, written, rc;
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u_char buf[CFEBURSTLEN];
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for (;;) {
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len = ttydisc_getc(tp, buf, sizeof buf);
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if (len == 0)
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break;
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written = 0;
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while (written < len) {
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rc = cfe_write(conhandle, &buf[written], len - written);
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if (rc < 0)
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break;
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written += rc;
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}
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}
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}
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static void
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cfe_timeout(void *v)
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{
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struct tty *tp;
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int c;
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tp = (struct tty *)v;
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tty_lock_assert(tp, MA_OWNED);
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while ((c = cfe_cngetc(NULL)) != -1)
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ttydisc_rint(tp, c, 0);
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ttydisc_rint_done(tp);
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callout_reset(&cfe_timer, polltime, cfe_timeout, tp);
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}
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static void
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cfe_cnprobe(struct consdev *cp)
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{
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conhandle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
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if (conhandle < 0) {
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cp->cn_pri = CN_DEAD;
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return;
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}
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/* XXX */
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if (bootverbose) {
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char *bootmsg = "Using CFE firmware console.\n";
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int i;
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for (i = 0; i < strlen(bootmsg); i++)
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cfe_cnputc(cp, bootmsg[i]);
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}
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cp->cn_pri = CN_LOW;
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}
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static void
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cfe_cninit(struct consdev *cp)
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{
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strcpy(cp->cn_name, "cfecons");
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}
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static void
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cfe_cnterm(struct consdev *cp)
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{
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}
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static void
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cfe_cngrab(struct consdev *cp)
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{
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}
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static void
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cfe_cnungrab(struct consdev *cp)
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{
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}
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static int
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cfe_cngetc(struct consdev *cp)
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{
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unsigned char ch;
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if (cfe_read(conhandle, &ch, 1) == 1) {
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#if defined(KDB)
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kdb_alt_break(ch, &alt_break_state);
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#endif
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return (ch);
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}
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return (-1);
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}
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static void
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cfe_cnputc(struct consdev *cp, int c)
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{
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char cbuf;
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if (c == '\n')
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cfe_cnputc(cp, '\r');
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cbuf = c;
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while (cfe_write(conhandle, &cbuf, 1) == 0)
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continue;
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}
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SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL);
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