1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2007 Bruce M. Simpson. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/kdb.h> 32 #include <sys/kernel.h> 33 #include <sys/priv.h> 34 #include <sys/systm.h> 35 #include <sys/types.h> 36 #include <sys/conf.h> 37 #include <sys/cons.h> 38 #include <sys/consio.h> 39 #include <sys/tty.h> 40 41 #include <dev/cfe/cfe_api.h> 42 #include <dev/cfe/cfe_error.h> 43 44 #include <ddb/ddb.h> 45 46 #ifndef CFECONS_POLL_HZ 47 #define CFECONS_POLL_HZ 4 48 #endif 49 #define CFEBURSTLEN 128 /* max number of bytes to write in one chunk */ 50 51 static tsw_open_t cfe_tty_open; 52 static tsw_close_t cfe_tty_close; 53 static tsw_outwakeup_t cfe_tty_outwakeup; 54 55 static struct ttydevsw cfe_ttydevsw = { 56 .tsw_flags = TF_NOPREFIX, 57 .tsw_open = cfe_tty_open, 58 .tsw_close = cfe_tty_close, 59 .tsw_outwakeup = cfe_tty_outwakeup, 60 }; 61 62 static int conhandle = -1; 63 /* XXX does cfe have to poll? */ 64 static int polltime; 65 static struct callout cfe_timer; 66 67 #if defined(KDB) 68 static int alt_break_state; 69 #endif 70 71 static void cfe_timeout(void *); 72 73 static cn_probe_t cfe_cnprobe; 74 static cn_init_t cfe_cninit; 75 static cn_term_t cfe_cnterm; 76 static cn_getc_t cfe_cngetc; 77 static cn_putc_t cfe_cnputc; 78 static cn_grab_t cfe_cngrab; 79 static cn_ungrab_t cfe_cnungrab; 80 81 CONSOLE_DRIVER(cfe); 82 83 static void 84 cn_drvinit(void *unused) 85 { 86 struct tty *tp; 87 88 if (cfe_consdev.cn_pri != CN_DEAD && 89 cfe_consdev.cn_name[0] != '\0') { 90 tp = tty_alloc(&cfe_ttydevsw, NULL); 91 callout_init_mtx(&cfe_timer, tty_getlock(tp), 0); 92 tty_makedev(tp, NULL, "cfecons"); 93 } 94 } 95 96 static int 97 cfe_tty_open(struct tty *tp) 98 { 99 polltime = hz / CFECONS_POLL_HZ; 100 if (polltime < 1) 101 polltime = 1; 102 callout_reset(&cfe_timer, polltime, cfe_timeout, tp); 103 104 return (0); 105 } 106 107 static void 108 cfe_tty_close(struct tty *tp) 109 { 110 111 callout_stop(&cfe_timer); 112 } 113 114 static void 115 cfe_tty_outwakeup(struct tty *tp) 116 { 117 int len, written, rc; 118 u_char buf[CFEBURSTLEN]; 119 120 for (;;) { 121 len = ttydisc_getc(tp, buf, sizeof buf); 122 if (len == 0) 123 break; 124 125 written = 0; 126 while (written < len) { 127 rc = cfe_write(conhandle, &buf[written], len - written); 128 if (rc < 0) 129 break; 130 written += rc; 131 } 132 } 133 } 134 135 static void 136 cfe_timeout(void *v) 137 { 138 struct tty *tp; 139 int c; 140 141 tp = (struct tty *)v; 142 143 tty_assert_locked(tp); 144 while ((c = cfe_cngetc(NULL)) != -1) 145 ttydisc_rint(tp, c, 0); 146 ttydisc_rint_done(tp); 147 148 callout_reset(&cfe_timer, polltime, cfe_timeout, tp); 149 } 150 151 static void 152 cfe_cnprobe(struct consdev *cp) 153 { 154 155 conhandle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE); 156 if (conhandle < 0) { 157 cp->cn_pri = CN_DEAD; 158 return; 159 } 160 161 /* XXX */ 162 if (bootverbose) { 163 char *bootmsg = "Using CFE firmware console.\n"; 164 int i; 165 166 for (i = 0; i < strlen(bootmsg); i++) 167 cfe_cnputc(cp, bootmsg[i]); 168 } 169 170 cp->cn_pri = CN_LOW; 171 } 172 173 static void 174 cfe_cninit(struct consdev *cp) 175 { 176 177 strcpy(cp->cn_name, "cfecons"); 178 } 179 180 static void 181 cfe_cnterm(struct consdev *cp) 182 { 183 184 } 185 186 static void 187 cfe_cngrab(struct consdev *cp) 188 { 189 190 } 191 192 static void 193 cfe_cnungrab(struct consdev *cp) 194 { 195 196 } 197 198 static int 199 cfe_cngetc(struct consdev *cp) 200 { 201 unsigned char ch; 202 203 if (cfe_read(conhandle, &ch, 1) == 1) { 204 #if defined(KDB) 205 kdb_alt_break(ch, &alt_break_state); 206 #endif 207 return (ch); 208 } 209 210 return (-1); 211 } 212 213 static void 214 cfe_cnputc(struct consdev *cp, int c) 215 { 216 char cbuf; 217 218 if (c == '\n') 219 cfe_cnputc(cp, '\r'); 220 221 cbuf = c; 222 while (cfe_write(conhandle, &cbuf, 1) == 0) 223 continue; 224 } 225 226 SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL); 227