FreeBSD/Linux Kernel Cross Reference
sys/isa/syscons_isa.c
1 /*-
2 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer as
10 * the first lines of this file unmodified.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: src/sys/isa/syscons_isa.c,v 1.32 2008/03/26 22:02:50 phk Exp $");
29
30 #include "opt_syscons.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/bus.h>
37 #include <sys/cons.h>
38 #include <sys/kbio.h>
39 #include <sys/consio.h>
40 #include <sys/sysctl.h>
41
42 #if defined(__i386__) || defined(__amd64__)
43
44 #include <machine/clock.h>
45 #include <machine/md_var.h>
46 #include <machine/pc/bios.h>
47
48 #include <vm/vm.h>
49 #include <vm/pmap.h>
50 #include <vm/vm_param.h>
51
52 #define BIOS_CLKED (1 << 6)
53 #define BIOS_NLKED (1 << 5)
54 #define BIOS_SLKED (1 << 4)
55 #define BIOS_ALKED 0
56
57 #endif
58
59 #include <dev/syscons/syscons.h>
60
61 #include <isa/isavar.h>
62
63 #include "opt_xbox.h"
64
65 #ifdef XBOX
66 #include <machine/xbox.h>
67 #endif
68
69 static devclass_t sc_devclass;
70
71 static sc_softc_t main_softc;
72 #ifdef SC_NO_SUSPEND_VTYSWITCH
73 static int sc_no_suspend_vtswitch = 1;
74 #else
75 static int sc_no_suspend_vtswitch = 0;
76 #endif
77 static int sc_cur_scr;
78
79 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
80 SYSCTL_DECL(_hw_syscons);
81 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
82 &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
83
84 static void
85 scidentify (driver_t *driver, device_t parent)
86 {
87 BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
88 }
89
90 static int
91 scprobe(device_t dev)
92 {
93 /* No pnp support */
94 if (isa_get_vendorid(dev))
95 return (ENXIO);
96
97 device_set_desc(dev, "System console");
98 return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
99 }
100
101 static int
102 scattach(device_t dev)
103 {
104 return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
105 }
106
107 static int
108 scsuspend(device_t dev)
109 {
110 int retry = 10;
111 sc_softc_t *sc;
112
113 sc = &main_softc;
114
115 if (sc->cur_scp == NULL)
116 return (0);
117
118 sc_cur_scr = sc->cur_scp->index;
119
120 if (sc_no_suspend_vtswitch)
121 return (0);
122
123 do {
124 sc_switch_scr(sc, 0);
125 if (!sc->switch_in_progress) {
126 break;
127 }
128 pause("scsuspend", hz);
129 } while (retry--);
130
131 return (0);
132 }
133
134 static int
135 scresume(device_t dev)
136 {
137 sc_softc_t *sc;
138
139 if (sc_no_suspend_vtswitch)
140 return (0);
141
142 sc = &main_softc;
143 sc_switch_scr(sc, sc_cur_scr);
144
145 return (0);
146 }
147
148 int
149 sc_max_unit(void)
150 {
151 return devclass_get_maxunit(sc_devclass);
152 }
153
154 sc_softc_t
155 *sc_get_softc(int unit, int flags)
156 {
157 sc_softc_t *sc;
158
159 if (unit < 0)
160 return NULL;
161 if (flags & SC_KERNEL_CONSOLE) {
162 /* FIXME: clear if it is wired to another unit! */
163 sc = &main_softc;
164 } else {
165 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
166 if (sc == NULL)
167 return NULL;
168 }
169 sc->unit = unit;
170 if (!(sc->flags & SC_INIT_DONE)) {
171 sc->keyboard = -1;
172 sc->adapter = -1;
173 sc->cursor_char = SC_CURSOR_CHAR;
174 sc->mouse_char = SC_MOUSE_CHAR;
175 }
176 return sc;
177 }
178
179 sc_softc_t
180 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
181 {
182 sc_softc_t *sc;
183 int units;
184 int i;
185
186 sc = &main_softc;
187 if (((adp == NULL) || (adp == sc->adp))
188 && ((kbd == NULL) || (kbd == sc->kbd)))
189 return sc;
190 units = devclass_get_maxunit(sc_devclass);
191 for (i = 0; i < units; ++i) {
192 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
193 if (sc == NULL)
194 continue;
195 if (((adp == NULL) || (adp == sc->adp))
196 && ((kbd == NULL) || (kbd == sc->kbd)))
197 return sc;
198 }
199 return NULL;
200 }
201
202 int
203 sc_get_cons_priority(int *unit, int *flags)
204 {
205 const char *at;
206 int u, f;
207
208 #ifdef XBOX
209 /*
210 * The XBox Loader does not support hints, which makes our initial
211 * console probe fail. Therefore, if an XBox is found, we hardcode the
212 * existence of the console, as it is always there anyway.
213 */
214 if (arch_i386_is_xbox) {
215 *unit = 0;
216 *flags = SC_KERNEL_CONSOLE;
217 return CN_INTERNAL;
218 }
219 #endif
220
221 *unit = -1;
222 for (u = 0; u < 16; u++) {
223 if (resource_disabled(SC_DRIVER_NAME, u))
224 continue;
225 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
226 continue;
227 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
228 f = 0;
229 if (f & SC_KERNEL_CONSOLE) {
230 /* the user designates this unit to be the console */
231 *unit = u;
232 *flags = f;
233 break;
234 }
235 if (*unit < 0) {
236 /* ...otherwise remember the first found unit */
237 *unit = u;
238 *flags = f;
239 }
240 }
241 if (*unit < 0)
242 return CN_DEAD;
243 #if 0
244 return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
245 #endif
246 return CN_INTERNAL;
247 }
248
249 void
250 sc_get_bios_values(bios_values_t *values)
251 {
252 #if defined(__i386__) || defined(__amd64__)
253 u_int8_t shift;
254
255 values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
256 values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
257 shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
258 values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
259 | ((shift & BIOS_NLKED) ? NLKED : 0)
260 | ((shift & BIOS_SLKED) ? SLKED : 0)
261 | ((shift & BIOS_ALKED) ? ALKED : 0);
262 #else
263 values->cursor_start = 0;
264 values->cursor_end = 32;
265 values->shift_state = 0;
266 #endif
267 values->bell_pitch = BELL_PITCH;
268 }
269
270 int
271 sc_tone(int herz)
272 {
273 #if defined(HAS_TIMER_SPKR)
274 if (herz) {
275 if (timer_spkr_acquire())
276 return EBUSY;
277 timer_spkr_setfreq(herz);
278 } else {
279 timer_spkr_release();
280 }
281 #endif
282
283 return 0;
284 }
285
286 static device_method_t sc_methods[] = {
287 DEVMETHOD(device_identify, scidentify),
288 DEVMETHOD(device_probe, scprobe),
289 DEVMETHOD(device_attach, scattach),
290 DEVMETHOD(device_suspend, scsuspend),
291 DEVMETHOD(device_resume, scresume),
292 { 0, 0 }
293 };
294
295 static driver_t sc_driver = {
296 SC_DRIVER_NAME,
297 sc_methods,
298 sizeof(sc_softc_t),
299 };
300
301 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
302
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