2 * Copyright (c) 2007 Bruce M. Simpson.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include "opt_comconsole.h"
32 #include <sys/param.h>
34 #include <sys/kernel.h>
36 #include <sys/systm.h>
37 #include <sys/types.h>
40 #include <sys/consio.h>
43 #include <dev/cfe/cfe_api.h>
44 #include <dev/cfe/cfe_error.h>
48 #ifndef CFECONS_POLL_HZ
49 #define CFECONS_POLL_HZ 4
51 #define CFEBURSTLEN 128 /* max number of bytes to write in one chunk */
53 static tsw_open_t cfe_tty_open;
54 static tsw_close_t cfe_tty_close;
55 static tsw_outwakeup_t cfe_tty_outwakeup;
57 static struct ttydevsw cfe_ttydevsw = {
58 .tsw_flags = TF_NOPREFIX,
59 .tsw_open = cfe_tty_open,
60 .tsw_close = cfe_tty_close,
61 .tsw_outwakeup = cfe_tty_outwakeup,
64 static int conhandle = -1;
65 /* XXX does cfe have to poll? */
67 static struct callout_handle cfe_timeouthandle
68 = CALLOUT_HANDLE_INITIALIZER(&cfe_timeouthandle);
70 #if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
71 static int alt_break_state;
74 static void cfe_timeout(void *);
76 static cn_probe_t cfe_cnprobe;
77 static cn_init_t cfe_cninit;
78 static cn_term_t cfe_cnterm;
79 static cn_getc_t cfe_cngetc;
80 static cn_putc_t cfe_cnputc;
85 cn_drvinit(void *unused)
90 if (cfe_consdev.cn_pri != CN_DEAD &&
91 cfe_consdev.cn_name[0] != '\0') {
92 tp = tty_alloc(&cfe_ttydevsw, NULL);
93 tty_makedev(tp, NULL, "%s", output);
94 tty_makealias(tp, "cfecons");
99 cfe_tty_open(struct tty *tp)
101 polltime = hz / CFECONS_POLL_HZ;
104 cfe_timeouthandle = timeout(cfe_timeout, tp, polltime);
110 cfe_tty_close(struct tty *tp)
113 /* XXX Should be replaced with callout_stop(9) */
114 untimeout(cfe_timeout, tp, cfe_timeouthandle);
118 cfe_tty_outwakeup(struct tty *tp)
121 u_char buf[CFEBURSTLEN];
124 len = ttydisc_getc(tp, buf, sizeof buf);
127 while (cfe_write(conhandle, buf, len) == 0)
138 tp = (struct tty *)v;
141 while ((c = cfe_cngetc(NULL)) != -1)
142 ttydisc_rint(tp, c, 0);
143 ttydisc_rint_done(tp);
146 cfe_timeouthandle = timeout(cfe_timeout, tp, polltime);
150 cfe_cnprobe(struct consdev *cp)
153 conhandle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
155 cp->cn_pri = CN_DEAD;
161 char *bootmsg = "Using CFE firmware console.\n";
164 for (i = 0; i < strlen(bootmsg); i++)
165 cfe_cnputc(cp, bootmsg[i]);
172 cfe_cninit(struct consdev *cp)
175 strcpy(cp->cn_name, "cfecons");
179 cfe_cnterm(struct consdev *cp)
185 cfe_cngetc(struct consdev *cp)
190 while ((result = cfe_read(conhandle, &ch, 1)) == 0)
194 #if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
197 if ((kdb_brk = kdb_alt_break(ch, &alt_break_state)) != 0) {
199 case KDB_REQ_DEBUGGER:
200 kdb_enter(KDB_WHY_BREAK,
201 "Break sequence on console");
204 kdb_panic("Panic sequence on console");
220 cfe_cnputc(struct consdev *cp, int c)
225 cfe_cnputc(cp, '\r');
228 while (cfe_write(conhandle, &cbuf, 1) == 0)
232 SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL);