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 * $FreeBSD$
27 */
28
29 #include "opt_syscons.h"
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/bus.h>
36 #include <sys/cons.h>
37
38 #include <machine/console.h>
39
40 #ifdef __i386__
41
42 #include <machine/clock.h>
43 #include <machine/md_var.h>
44 #include <machine/pc/bios.h>
45
46 #include <vm/vm.h>
47 #include <vm/pmap.h>
48
49 #include <i386/isa/timerreg.h>
50
51 #define BIOS_CLKED (1 << 6)
52 #define BIOS_NLKED (1 << 5)
53 #define BIOS_SLKED (1 << 4)
54 #define BIOS_ALKED 0
55
56 #endif /* __i386__ */
57
58 #include <dev/syscons/syscons.h>
59
60 #include <isa/isareg.h>
61 #include <isa/isavar.h>
62
63 static devclass_t sc_devclass;
64
65 static int scprobe(device_t dev);
66 static int scattach(device_t dev);
67
68 static device_method_t sc_methods[] = {
69 DEVMETHOD(device_probe, scprobe),
70 DEVMETHOD(device_attach, scattach),
71 { 0, 0 }
72 };
73
74 static driver_t sc_driver = {
75 SC_DRIVER_NAME,
76 sc_methods,
77 sizeof(sc_softc_t),
78 };
79
80 static sc_softc_t main_softc;
81
82 static int
83 scprobe(device_t dev)
84 {
85 /* No pnp support */
86 if (isa_get_vendorid(dev))
87 return (ENXIO);
88
89 device_set_desc(dev, "System console");
90 return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
91 }
92
93 static int
94 scattach(device_t dev)
95 {
96 return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
97 }
98
99 int
100 sc_max_unit(void)
101 {
102 return devclass_get_maxunit(sc_devclass);
103 }
104
105 sc_softc_t
106 *sc_get_softc(int unit, int flags)
107 {
108 sc_softc_t *sc;
109
110 if (unit < 0)
111 return NULL;
112 if (flags & SC_KERNEL_CONSOLE) {
113 /* FIXME: clear if it is wired to another unit! */
114 sc = &main_softc;
115 } else {
116 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
117 if (sc == NULL)
118 return NULL;
119 }
120 sc->unit = unit;
121 if (!(sc->flags & SC_INIT_DONE)) {
122 sc->keyboard = -1;
123 sc->adapter = -1;
124 sc->cursor_char = SC_CURSOR_CHAR;
125 sc->mouse_char = SC_MOUSE_CHAR;
126 }
127 return sc;
128 }
129
130 sc_softc_t
131 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
132 {
133 sc_softc_t *sc;
134 int units;
135 int i;
136
137 sc = &main_softc;
138 if (((adp == NULL) || (adp == sc->adp))
139 && ((kbd == NULL) || (kbd == sc->kbd)))
140 return sc;
141 units = devclass_get_maxunit(sc_devclass);
142 for (i = 0; i < units; ++i) {
143 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
144 if (sc == NULL)
145 continue;
146 if (((adp == NULL) || (adp == sc->adp))
147 && ((kbd == NULL) || (kbd == sc->kbd)))
148 return sc;
149 }
150 return NULL;
151 }
152
153 int
154 sc_get_cons_priority(int *unit, int *flags)
155 {
156 int disabled;
157 int u, f;
158 int i;
159
160 *unit = -1;
161 for (i = -1; (i = resource_locate(i, SC_DRIVER_NAME)) >= 0;) {
162 u = resource_query_unit(i);
163 if ((resource_int_value(SC_DRIVER_NAME, u, "disabled",
164 &disabled) == 0) && disabled)
165 continue;
166 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
167 f = 0;
168 if (f & SC_KERNEL_CONSOLE) {
169 /* the user designates this unit to be the console */
170 *unit = u;
171 *flags = f;
172 break;
173 }
174 if (*unit < 0) {
175 /* ...otherwise remember the first found unit */
176 *unit = u;
177 *flags = f;
178 }
179 }
180 if ((i < 0) && (*unit < 0))
181 return CN_DEAD;
182 #if 0
183 return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
184 #endif
185 return CN_INTERNAL;
186 }
187
188 void
189 sc_get_bios_values(bios_values_t *values)
190 {
191 #ifdef __i386__
192 u_int8_t shift;
193
194 values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
195 values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
196 shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
197 values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
198 | ((shift & BIOS_NLKED) ? NLKED : 0)
199 | ((shift & BIOS_SLKED) ? SLKED : 0)
200 | ((shift & BIOS_ALKED) ? ALKED : 0);
201 values->bell_pitch = BELL_PITCH;
202 #else /* !__i386__ */
203 values->cursor_start = 0;
204 values->cursor_end = 32;
205 values->shift_state = 0;
206 values->bell_pitch = BELL_PITCH;
207 #endif /* __i386__ */
208 }
209
210 int
211 sc_tone(int herz)
212 {
213 #ifdef __i386__
214 int pitch;
215
216 if (herz) {
217 /* set command for counter 2, 2 byte write */
218 if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
219 return EBUSY;
220 /* set pitch */
221 pitch = timer_freq/herz;
222 outb(TIMER_CNTR2, pitch);
223 outb(TIMER_CNTR2, pitch >> 8);
224 /* enable counter 2 output to speaker */
225 outb(IO_PPI, inb(IO_PPI) | 3);
226 } else {
227 /* disable counter 2 output to speaker */
228 outb(IO_PPI, inb(IO_PPI) & 0xFC);
229 release_timer2();
230 }
231 #endif /* __i386__ */
232
233 return 0;
234 }
235
236 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
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