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: releng/6.3/sys/isa/syscons_isa.c 161534 2006-08-22 16:52:42Z rink $");
29
30 #include "opt_syscons.h"
31 #include "opt_xbox.h"
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/bus.h>
38 #include <sys/cons.h>
39 #include <sys/kbio.h>
40 #include <sys/consio.h>
41 #include <sys/sysctl.h>
42
43 #if defined(__i386__) || defined(__amd64__)
44
45 #include <machine/clock.h>
46 #include <machine/md_var.h>
47 #include <machine/ppireg.h>
48 #include <machine/timerreg.h>
49 #include <machine/pc/bios.h>
50
51 #ifdef XBOX
52 #include <machine/xbox.h>
53 #endif
54
55 #include <vm/vm.h>
56 #include <vm/pmap.h>
57 #include <vm/vm_param.h>
58
59 #define BIOS_CLKED (1 << 6)
60 #define BIOS_NLKED (1 << 5)
61 #define BIOS_SLKED (1 << 4)
62 #define BIOS_ALKED 0
63
64 #endif
65
66 #include <dev/syscons/syscons.h>
67
68 #include <isa/isavar.h>
69
70 static devclass_t sc_devclass;
71
72 static sc_softc_t main_softc;
73 #ifdef SC_NO_SUSPEND_VTYSWITCH
74 static int sc_no_suspend_vtswitch = 1;
75 #else
76 static int sc_no_suspend_vtswitch = 0;
77 #endif
78 static int sc_cur_scr;
79
80 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
81 SYSCTL_DECL(_hw_syscons);
82 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
83 &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
84
85 static void
86 scidentify (driver_t *driver, device_t parent)
87 {
88 BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
89 }
90
91 static int
92 scprobe(device_t dev)
93 {
94 /* No pnp support */
95 if (isa_get_vendorid(dev))
96 return (ENXIO);
97
98 device_set_desc(dev, "System console");
99 return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
100 }
101
102 static int
103 scattach(device_t dev)
104 {
105 return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
106 }
107
108 static int
109 scsuspend(device_t dev)
110 {
111 int retry = 10;
112 static int dummy;
113 sc_softc_t *sc;
114
115 sc = &main_softc;
116
117 if (sc->cur_scp == NULL)
118 return (0);
119
120 sc_cur_scr = sc->cur_scp->index;
121
122 if (sc_no_suspend_vtswitch)
123 return (0);
124
125 do {
126 sc_switch_scr(sc, 0);
127 if (!sc->switch_in_progress) {
128 break;
129 }
130 tsleep(&dummy, 0, "scsuspend", 100);
131 } while (retry--);
132
133 return (0);
134 }
135
136 static int
137 scresume(device_t dev)
138 {
139 sc_softc_t *sc;
140
141 if (sc_no_suspend_vtswitch)
142 return (0);
143
144 sc = &main_softc;
145 sc_switch_scr(sc, sc_cur_scr);
146
147 return (0);
148 }
149
150 int
151 sc_max_unit(void)
152 {
153 return devclass_get_maxunit(sc_devclass);
154 }
155
156 sc_softc_t
157 *sc_get_softc(int unit, int flags)
158 {
159 sc_softc_t *sc;
160
161 if (unit < 0)
162 return NULL;
163 if (flags & SC_KERNEL_CONSOLE) {
164 /* FIXME: clear if it is wired to another unit! */
165 sc = &main_softc;
166 } else {
167 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
168 if (sc == NULL)
169 return NULL;
170 }
171 sc->unit = unit;
172 if (!(sc->flags & SC_INIT_DONE)) {
173 sc->keyboard = -1;
174 sc->adapter = -1;
175 sc->cursor_char = SC_CURSOR_CHAR;
176 sc->mouse_char = SC_MOUSE_CHAR;
177 }
178 return sc;
179 }
180
181 sc_softc_t
182 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
183 {
184 sc_softc_t *sc;
185 int units;
186 int i;
187
188 sc = &main_softc;
189 if (((adp == NULL) || (adp == sc->adp))
190 && ((kbd == NULL) || (kbd == sc->kbd)))
191 return sc;
192 units = devclass_get_maxunit(sc_devclass);
193 for (i = 0; i < units; ++i) {
194 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
195 if (sc == NULL)
196 continue;
197 if (((adp == NULL) || (adp == sc->adp))
198 && ((kbd == NULL) || (kbd == sc->kbd)))
199 return sc;
200 }
201 return NULL;
202 }
203
204 int
205 sc_get_cons_priority(int *unit, int *flags)
206 {
207 const char *at;
208 int u, f;
209
210 #ifdef XBOX
211 /*
212 * The XBox Loader does not support hints, which makes our initial
213 * console probe fail. Therefore, if an XBox is found, we hardcode the
214 * existence of the console, as it is always there anyway.
215 */
216 if (arch_i386_is_xbox) {
217 *unit = 0;
218 *flags = SC_KERNEL_CONSOLE;
219 return CN_INTERNAL;
220 }
221 #endif
222
223 *unit = -1;
224 for (u = 0; u < 16; u++) {
225 if (resource_disabled(SC_DRIVER_NAME, u))
226 continue;
227 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
228 continue;
229 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
230 f = 0;
231 if (f & SC_KERNEL_CONSOLE) {
232 /* the user designates this unit to be the console */
233 *unit = u;
234 *flags = f;
235 break;
236 }
237 if (*unit < 0) {
238 /* ...otherwise remember the first found unit */
239 *unit = u;
240 *flags = f;
241 }
242 }
243 if (*unit < 0)
244 return CN_DEAD;
245 #if 0
246 return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
247 #endif
248 return CN_INTERNAL;
249 }
250
251 void
252 sc_get_bios_values(bios_values_t *values)
253 {
254 #if defined(__i386__) || defined(__amd64__)
255 u_int8_t shift;
256
257 values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
258 values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
259 shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
260 values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
261 | ((shift & BIOS_NLKED) ? NLKED : 0)
262 | ((shift & BIOS_SLKED) ? SLKED : 0)
263 | ((shift & BIOS_ALKED) ? ALKED : 0);
264 #else
265 values->cursor_start = 0;
266 values->cursor_end = 32;
267 values->shift_state = 0;
268 #endif
269 values->bell_pitch = BELL_PITCH;
270 }
271
272 int
273 sc_tone(int herz)
274 {
275 #if defined(__i386__) || defined(__amd64__)
276 if (herz) {
277 /* set command for counter 2, 2 byte write */
278 if (timer_spkr_acquire())
279 return EBUSY;
280 /* set pitch */
281 spkr_set_pitch(timer_freq / herz);
282 /* enable counter 2 output to speaker */
283 ppi_spkr_on();
284 } else {
285 /* disable counter 2 output to speaker */
286 ppi_spkr_off();
287 timer_spkr_release();
288 }
289 #endif
290
291 return 0;
292 }
293
294 static device_method_t sc_methods[] = {
295 DEVMETHOD(device_identify, scidentify),
296 DEVMETHOD(device_probe, scprobe),
297 DEVMETHOD(device_attach, scattach),
298 DEVMETHOD(device_suspend, scsuspend),
299 DEVMETHOD(device_resume, scresume),
300 { 0, 0 }
301 };
302
303 static driver_t sc_driver = {
304 SC_DRIVER_NAME,
305 sc_methods,
306 sizeof(sc_softc_t),
307 };
308
309 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
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