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/param.h> 30 #include <sys/kdb.h> 31 #include <sys/kernel.h> 32 #include <sys/priv.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/conf.h> 36 #include <sys/cons.h> 37 #include <sys/consio.h> 38 #include <sys/tty.h> 39 40 #include <dev/cfe/cfe_api.h> 41 #include <dev/cfe/cfe_error.h> 42 43 #include <ddb/ddb.h> 44 45 #ifndef CFECONS_POLL_HZ 46 #define CFECONS_POLL_HZ 4 47 #endif 48 #define CFEBURSTLEN 128 /* max number of bytes to write in one chunk */ 49 50 static tsw_open_t cfe_tty_open; 51 static tsw_close_t cfe_tty_close; 52 static tsw_outwakeup_t cfe_tty_outwakeup; 53 54 static struct ttydevsw cfe_ttydevsw = { 55 .tsw_flags = TF_NOPREFIX, 56 .tsw_open = cfe_tty_open, 57 .tsw_close = cfe_tty_close, 58 .tsw_outwakeup = cfe_tty_outwakeup, 59 }; 60 61 static int conhandle = -1; 62 /* XXX does cfe have to poll? */ 63 static int polltime; 64 static struct callout cfe_timer; 65 66 #if defined(KDB) 67 static int alt_break_state; 68 #endif 69 70 static void cfe_timeout(void *); 71 72 static cn_probe_t cfe_cnprobe; 73 static cn_init_t cfe_cninit; 74 static cn_term_t cfe_cnterm; 75 static cn_getc_t cfe_cngetc; 76 static cn_putc_t cfe_cnputc; 77 static cn_grab_t cfe_cngrab; 78 static cn_ungrab_t cfe_cnungrab; 79 80 CONSOLE_DRIVER(cfe); 81 82 static void 83 cn_drvinit(void *unused) 84 { 85 struct tty *tp; 86 87 if (cfe_consdev.cn_pri != CN_DEAD && 88 cfe_consdev.cn_name[0] != '\0') { 89 tp = tty_alloc(&cfe_ttydevsw, NULL); 90 callout_init_mtx(&cfe_timer, tty_getlock(tp), 0); 91 tty_makedev(tp, NULL, "cfecons"); 92 } 93 } 94 95 static int 96 cfe_tty_open(struct tty *tp) 97 { 98 polltime = hz / CFECONS_POLL_HZ; 99 if (polltime < 1) 100 polltime = 1; 101 callout_reset(&cfe_timer, polltime, cfe_timeout, tp); 102 103 return (0); 104 } 105 106 static void 107 cfe_tty_close(struct tty *tp) 108 { 109 110 callout_stop(&cfe_timer); 111 } 112 113 static void 114 cfe_tty_outwakeup(struct tty *tp) 115 { 116 int len, written, rc; 117 u_char buf[CFEBURSTLEN]; 118 119 for (;;) { 120 len = ttydisc_getc(tp, buf, sizeof buf); 121 if (len == 0) 122 break; 123 124 written = 0; 125 while (written < len) { 126 rc = cfe_write(conhandle, &buf[written], len - written); 127 if (rc < 0) 128 break; 129 written += rc; 130 } 131 } 132 } 133 134 static void 135 cfe_timeout(void *v) 136 { 137 struct tty *tp; 138 int c; 139 140 tp = (struct tty *)v; 141 142 tty_assert_locked(tp); 143 while ((c = cfe_cngetc(NULL)) != -1) 144 ttydisc_rint(tp, c, 0); 145 ttydisc_rint_done(tp); 146 147 callout_reset(&cfe_timer, polltime, cfe_timeout, tp); 148 } 149 150 static void 151 cfe_cnprobe(struct consdev *cp) 152 { 153 154 conhandle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE); 155 if (conhandle < 0) { 156 cp->cn_pri = CN_DEAD; 157 return; 158 } 159 160 /* XXX */ 161 if (bootverbose) { 162 char *bootmsg = "Using CFE firmware console.\n"; 163 int i; 164 165 for (i = 0; i < strlen(bootmsg); i++) 166 cfe_cnputc(cp, bootmsg[i]); 167 } 168 169 cp->cn_pri = CN_LOW; 170 } 171 172 static void 173 cfe_cninit(struct consdev *cp) 174 { 175 176 strcpy(cp->cn_name, "cfecons"); 177 } 178 179 static void 180 cfe_cnterm(struct consdev *cp) 181 { 182 183 } 184 185 static void 186 cfe_cngrab(struct consdev *cp) 187 { 188 189 } 190 191 static void 192 cfe_cnungrab(struct consdev *cp) 193 { 194 195 } 196 197 static int 198 cfe_cngetc(struct consdev *cp) 199 { 200 unsigned char ch; 201 202 if (cfe_read(conhandle, &ch, 1) == 1) { 203 #if defined(KDB) 204 kdb_alt_break(ch, &alt_break_state); 205 #endif 206 return (ch); 207 } 208 209 return (-1); 210 } 211 212 static void 213 cfe_cnputc(struct consdev *cp, int c) 214 { 215 char cbuf; 216 217 if (c == '\n') 218 cfe_cnputc(cp, '\r'); 219 220 cbuf = c; 221 while (cfe_write(conhandle, &cbuf, 1) == 0) 222 continue; 223 } 224 225 SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL); 226