1 /* $NetBSD: consinit.c,v 1.9 2012/08/10 14:52:26 tsutsui Exp $ */
2
3 /*-
4 * Copyright (c) 2001 Matthew Fredette
5 * Copyright (c) 1999 Eduardo E. Horvath
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.9 2012/08/10 14:52:26 tsutsui Exp $");
34
35 #include "opt_ddb.h"
36 #include "opt_kgdb.h"
37 #include "pcons.h"
38 #include "kbd.h"
39 #include "zs.h"
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/conf.h>
44 #include <sys/device.h>
45 #include <sys/file.h>
46 #include <sys/ioctl.h>
47 #include <sys/kernel.h>
48 #include <sys/proc.h>
49 #include <sys/tty.h>
50 #include <sys/time.h>
51 #include <sys/syslog.h>
52 #include <sys/kgdb.h>
53
54 #include <machine/autoconf.h>
55 #include <machine/promlib.h>
56 #include <machine/cpu.h>
57 #include <machine/eeprom.h>
58 #include <machine/psl.h>
59 #include <machine/z8530var.h>
60
61 #include <dev/cons.h>
62
63 #include <sun2/dev/cons.h>
64
65 static void prom_cnprobe(struct consdev *);
66 static void prom_cninit(struct consdev *);
67 int prom_cngetc(dev_t);
68 static void prom_cnputc(dev_t, int);
69 static void prom_cnpollc(dev_t, int);
70 static void prom_cnputc(dev_t, int);
71
72 #ifdef PROM_OBP_V2
73 /*
74 * The following several variables are related to
75 * the configuration process, and are used in initializing
76 * the machine.
77 */
78 int prom_stdin_node; /* node ID of ROM's console input device */
79 int prom_stdout_node; /* node ID of ROM's console output device */
80 char prom_stdin_args[16];
81 char prom_stdout_args[16];
82 #endif /* PROM_OBP_V2 */
83
84 /*
85 * The console is set to this one initially,
86 * which lets us use the PROM until consinit()
87 * is called to select a real console.
88 */
89 struct consdev consdev_prom = {
90 prom_cnprobe,
91 prom_cninit,
92 prom_cngetc,
93 prom_cnputc,
94 prom_cnpollc,
95 NULL,
96 };
97
98 void
prom_cnprobe(struct consdev * cd)99 prom_cnprobe(struct consdev *cd)
100 {
101 #if NPCONS > 0
102 extern const struct cdevsw pcons_cdevsw;
103
104 cd->cn_dev = makedev(cdevsw_lookup_major(&pcons_cdevsw), 0);
105 cd->cn_pri = CN_INTERNAL;
106 #endif
107 }
108
109 int
prom_cngetc(dev_t dev)110 prom_cngetc(dev_t dev)
111 {
112 int ch;
113 #ifdef DDB
114 static int nplus = 0;
115 #endif
116
117 ch = prom_getchar();
118 #ifdef DDB
119 if (ch == '+') {
120 if (nplus++ > 3) Debugger();
121 } else nplus = 0;
122 #endif
123 return ch;
124 }
125
126 static void
prom_cninit(struct consdev * cn)127 prom_cninit(struct consdev *cn)
128 {
129 }
130
131 /*
132 * PROM console output putchar.
133 */
134 static void
prom_cnputc(dev_t dev,int c)135 prom_cnputc(dev_t dev, int c)
136 {
137 int s;
138
139 s = splhigh();
140 prom_putchar(c);
141 splx(s);
142 }
143
144 void
prom_cnpollc(dev_t dev,int on)145 prom_cnpollc(dev_t dev, int on)
146 {
147 if (on) {
148 /* Entering debugger. */
149 #if NFB > 0
150 fb_unblank();
151 #endif
152 } else {
153 /* Resuming kernel. */
154 }
155 #if NPCONS > 0
156 pcons_cnpollc(dev, on);
157 #endif
158 }
159
160 /*****************************************************************/
161
162 #ifdef DEBUG
163 #define DBPRINT(x) prom_printf x
164 #else
165 #define DBPRINT(x)
166 #endif
167
168 #ifdef notyet /* PROM_OBP_V2 */
169 void
prom_get_device_args(const char * prop,char * dev,unsigned int dev_sz,char * args,unsigned int args_sz)170 prom_get_device_args(const char *prop, char *dev, unsigned int dev_sz,
171 char *args, unsigned int args_sz)
172 {
173 char *cp, buffer[128];
174
175 getpropstringA(prom_findroot(), (char *)prop, buffer, sizeof buffer);
176
177 /*
178 * Extract device-specific arguments from a PROM device path (if any)
179 */
180 cp = buffer + strlen(buffer);
181 while (cp >= buffer) {
182 if (*cp == ':') {
183 strncpy(args, cp+1, args_sz);
184 *cp = '\0';
185 strncpy(dev, buffer, dev_sz);
186 break;
187 }
188 cp--;
189 }
190 }
191 #endif /* PROM_OBP_V2 */
192
193 /*
194 * This function replaces sys/dev/cninit.c
195 * Determine which device is the console using
196 * the PROM "input source" and "output sink".
197 */
198 void
consinit(void)199 consinit(void)
200 {
201 #ifdef notyet /* PROM_OBP_V2 */
202 char buffer[128];
203 #endif /* PROM_OBP_V2 */
204 const char *consname = "unknown";
205 #if KGDB
206 #if NZS > 0
207 extern const struct cdevsw zstty_cdevsw;
208 #endif
209 #endif
210
211 DBPRINT(("consinit()\r\n"));
212 if (cn_tab != &consdev_prom) return;
213
214 switch(prom_version()) {
215 #ifdef PROM_OLDMON
216 case PROM_OLDMON:
217 case PROM_OBP_V0:
218 switch(prom_stdin()) {
219 case PROMDEV_KBD:
220 consname = "keyboard/display";
221 break;
222 case PROMDEV_TTYA:
223 consname = "ttya";
224 break;
225 case PROMDEV_TTYB:
226 consname = "ttyb";
227 break;
228 }
229 break;
230 #endif /* PROM_OLDMON */
231
232 #ifdef notyet /* PROM_OBP_V2 */
233 case PROM_OBP_V2:
234 case PROM_OBP_V3:
235 case PROM_OPENFIRM:
236
237 /* Save PROM arguments for device matching */
238 prom_get_device_args("stdin-path",
239 buffer,
240 sizeof(buffer),
241 prom_stdin_args,
242 sizeof(prom_stdin_args));
243 prom_get_device_args("stdout-path",
244 buffer,
245 sizeof(buffer),
246 prom_stdout_args,
247 sizeof(prom_stdout_args));
248
249 /*
250 * Translate the STDIO package instance (`ihandle') -- that
251 * the PROM has already opened for us -- to a device tree
252 * node (i.e. a `phandle').
253 */
254 DBPRINT(("stdin instance = %x\r\n", prom_stdin()));
255 if ((prom_stdin_node = prom_instance_to_package(prom_stdin())) == 0) {
256 printf("WARNING: no PROM stdin\n");
257 }
258 DBPRINT(("stdin package = %x\r\n", prom_stdin_node));
259
260 DBPRINT(("stdout instance = %x\r\n", prom_stdout()));
261 if ((prom_stdout_node = prom_instance_to_package(prom_stdout())) == 0) {
262 printf("WARNING: no PROM stdout\n");
263 }
264 DBPRINT(("stdout package = %x\r\n", prom_stdout_node));
265 DBPRINT(("buffer @ %p\r\n", buffer));
266
267 if (prom_stdin_node && prom_node_has_property(prom_stdin_node, "keyboard")) {
268 #if NKBD == 0
269 printf("cninit: kdb/display not configured\n");
270 #endif
271 consname = "keyboard/display";
272 } else if (prom_stdout_node)
273 consname = buffer;
274 #endif /* PROM_OBP_V2 */
275 }
276 printf("console is %s\n", consname);
277
278 /* Initialize PROM console */
279 (*cn_tab->cn_probe)(cn_tab);
280 (*cn_tab->cn_init)(cn_tab);
281
282 #ifdef KGDB
283 /* Set up KGDB */
284 #if NZS > 0
285 if (cdevsw_lookup(kgdb_dev) == &zstty_cdevsw)
286 zs_kgdb_init();
287 #endif /* NZS > 0 */
288 #endif /* KGDB */
289 }
290
291