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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("$FreeBSD$");
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/ppireg.h>
47 #include <machine/timerreg.h>
48 #include <machine/pc/bios.h>
49
50 #include <vm/vm.h>
51 #include <vm/pmap.h>
52 #include <vm/vm_param.h>
53
54 #define BIOS_CLKED      (1 << 6)
55 #define BIOS_NLKED      (1 << 5)
56 #define BIOS_SLKED      (1 << 4)
57 #define BIOS_ALKED      0
58
59 #endif
60
61 #include <dev/syscons/syscons.h>
62
63 #include <isa/isavar.h>
64
65 #include "opt_xbox.h"
66
67 #ifdef XBOX
68 #include <machine/xbox.h>
69 #endif
70
71 static devclass_t       sc_devclass;
72
73 static sc_softc_t main_softc;
74 #ifdef SC_NO_SUSPEND_VTYSWITCH
75 static int sc_no_suspend_vtswitch = 1;
76 #else
77 static int sc_no_suspend_vtswitch = 0;
78 #endif
79 static int sc_cur_scr;
80
81 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
82 SYSCTL_DECL(_hw_syscons);
83 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
84         &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
85
86 static void
87 scidentify (driver_t *driver, device_t parent)
88 {
89         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
90 }
91
92 static int
93 scprobe(device_t dev)
94 {
95         /* No pnp support */
96         if (isa_get_vendorid(dev))
97                 return (ENXIO);
98
99         device_set_desc(dev, "System console");
100         return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
101 }
102
103 static int
104 scattach(device_t dev)
105 {
106         return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
107 }
108
109 static int
110 scsuspend(device_t dev)
111 {
112         int             retry = 10;
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                 pause("scsuspend", hz);
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);