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/5.2/sys/isa/syscons_isa.c 121704 2003-10-29 20:48:13Z njl $");
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 #ifdef __i386__
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
51 #include <i386/isa/timerreg.h>
52
53 #define BIOS_CLKED (1 << 6)
54 #define BIOS_NLKED (1 << 5)
55 #define BIOS_SLKED (1 << 4)
56 #define BIOS_ALKED 0
57
58 #endif /* __i386__ */
59
60 #include <dev/syscons/syscons.h>
61
62 #include <isa/isareg.h>
63 #include <isa/isavar.h>
64
65 static devclass_t sc_devclass;
66
67 static sc_softc_t main_softc;
68 #ifdef SC_NO_SUSPEND_VTYSWITCH
69 static int sc_no_suspend_vtswitch = 1;
70 #else
71 static int sc_no_suspend_vtswitch = 0;
72 #endif
73 static int sc_cur_scr;
74
75 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
76 SYSCTL_DECL(_hw_syscons);
77 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
78 &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
79
80 static void
81 scidentify (driver_t *driver, device_t parent)
82 {
83 BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
84 }
85
86 static int
87 scprobe(device_t dev)
88 {
89 /* No pnp support */
90 if (isa_get_vendorid(dev))
91 return (ENXIO);
92
93 device_set_desc(dev, "System console");
94 return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
95 }
96
97 static int
98 scattach(device_t dev)
99 {
100 return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
101 }
102
103 static int
104 scsuspend(device_t dev)
105 {
106 int retry = 10;
107 static int dummy;
108 sc_softc_t *sc;
109
110 sc = &main_softc;
111
112 if (sc->cur_scp == NULL)
113 return (0);
114
115 sc_cur_scr = sc->cur_scp->index;
116
117 if (sc_no_suspend_vtswitch)
118 return (0);
119
120 do {
121 sc_switch_scr(sc, 0);
122 if (!sc->switch_in_progress) {
123 break;
124 }
125 tsleep(&dummy, 0, "scsuspend", 100);
126 } while (retry--);
127
128 return (0);
129 }
130
131 static int
132 scresume(device_t dev)
133 {
134 sc_softc_t *sc;
135
136 if (sc_no_suspend_vtswitch)
137 return (0);
138
139 sc = &main_softc;
140 sc_switch_scr(sc, sc_cur_scr);
141
142 return (0);
143 }
144
145 int
146 sc_max_unit(void)
147 {
148 return devclass_get_maxunit(sc_devclass);
149 }
150
151 sc_softc_t
152 *sc_get_softc(int unit, int flags)
153 {
154 sc_softc_t *sc;
155
156 if (unit < 0)
157 return NULL;
158 if (flags & SC_KERNEL_CONSOLE) {
159 /* FIXME: clear if it is wired to another unit! */
160 sc = &main_softc;
161 } else {
162 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
163 if (sc == NULL)
164 return NULL;
165 }
166 sc->unit = unit;
167 if (!(sc->flags & SC_INIT_DONE)) {
168 sc->keyboard = -1;
169 sc->adapter = -1;
170 sc->cursor_char = SC_CURSOR_CHAR;
171 sc->mouse_char = SC_MOUSE_CHAR;
172 }
173 return sc;
174 }
175
176 sc_softc_t
177 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
178 {
179 sc_softc_t *sc;
180 int units;
181 int i;
182
183 sc = &main_softc;
184 if (((adp == NULL) || (adp == sc->adp))
185 && ((kbd == NULL) || (kbd == sc->kbd)))
186 return sc;
187 units = devclass_get_maxunit(sc_devclass);
188 for (i = 0; i < units; ++i) {
189 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
190 if (sc == NULL)
191 continue;
192 if (((adp == NULL) || (adp == sc->adp))
193 && ((kbd == NULL) || (kbd == sc->kbd)))
194 return sc;
195 }
196 return NULL;
197 }
198
199 int
200 sc_get_cons_priority(int *unit, int *flags)
201 {
202 const char *at;
203 int u, f;
204
205 *unit = -1;
206 for (u = 0; u < 16; u++) {
207 if (resource_disabled(SC_DRIVER_NAME, u))
208 continue;
209 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
210 continue;
211 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
212 f = 0;
213 if (f & SC_KERNEL_CONSOLE) {
214 /* the user designates this unit to be the console */
215 *unit = u;
216 *flags = f;
217 break;
218 }
219 if (*unit < 0) {
220 /* ...otherwise remember the first found unit */
221 *unit = u;
222 *flags = f;
223 }
224 }
225 if (*unit < 0)
226 return CN_DEAD;
227 #if 0
228 return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
229 #endif
230 return CN_INTERNAL;
231 }
232
233 void
234 sc_get_bios_values(bios_values_t *values)
235 {
236 #ifdef __i386__
237 u_int8_t shift;
238
239 values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
240 values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
241 shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
242 values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
243 | ((shift & BIOS_NLKED) ? NLKED : 0)
244 | ((shift & BIOS_SLKED) ? SLKED : 0)
245 | ((shift & BIOS_ALKED) ? ALKED : 0);
246 values->bell_pitch = BELL_PITCH;
247 #else /* !__i386__ */
248 values->cursor_start = 0;
249 values->cursor_end = 32;
250 values->shift_state = 0;
251 values->bell_pitch = BELL_PITCH;
252 #endif /* __i386__ */
253 }
254
255 int
256 sc_tone(int herz)
257 {
258 #ifdef __i386__
259 int pitch;
260
261 if (herz) {
262 /* set command for counter 2, 2 byte write */
263 if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
264 return EBUSY;
265 /* set pitch */
266 pitch = timer_freq/herz;
267 outb(TIMER_CNTR2, pitch);
268 outb(TIMER_CNTR2, pitch >> 8);
269 /* enable counter 2 output to speaker */
270 outb(IO_PPI, inb(IO_PPI) | 3);
271 } else {
272 /* disable counter 2 output to speaker */
273 outb(IO_PPI, inb(IO_PPI) & 0xFC);
274 release_timer2();
275 }
276 #endif /* __i386__ */
277
278 return 0;
279 }
280
281 static device_method_t sc_methods[] = {
282 DEVMETHOD(device_identify, scidentify),
283 DEVMETHOD(device_probe, scprobe),
284 DEVMETHOD(device_attach, scattach),
285 DEVMETHOD(device_suspend, scsuspend),
286 DEVMETHOD(device_resume, scresume),
287 { 0, 0 }
288 };
289
290 static driver_t sc_driver = {
291 SC_DRIVER_NAME,
292 sc_methods,
293 sizeof(sc_softc_t),
294 };
295
296 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
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