FreeBSD/Linux Kernel Cross Reference
sys/dev/sun/sunkbd.c
1 /* $NetBSD: sunkbd.c,v 1.19 2003/08/07 16:31:27 agc Exp $ */
2
3 /*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)kbd.c 8.2 (Berkeley) 10/30/93
41 */
42
43 /*
44 * /dev/kbd lower layer for sun keyboard off a tty (line discipline).
45 * This driver uses kbdsun middle layer to hook up to /dev/kbd.
46 */
47
48 /*
49 * Keyboard interface line discipline.
50 *
51 */
52
53 #include <sys/cdefs.h>
54 __KERNEL_RCSID(0, "$NetBSD: sunkbd.c,v 1.19 2003/08/07 16:31:27 agc Exp $");
55
56 #include <sys/param.h>
57 #include <sys/systm.h>
58 #include <sys/conf.h>
59 #include <sys/device.h>
60 #include <sys/kernel.h>
61 #include <sys/malloc.h>
62 #include <sys/proc.h>
63 #include <sys/signal.h>
64 #include <sys/signalvar.h>
65 #include <sys/time.h>
66 #include <sys/select.h>
67 #include <sys/syslog.h>
68 #include <sys/fcntl.h>
69 #include <sys/tty.h>
70
71 #include <dev/cons.h>
72 #include <machine/vuid_event.h>
73 #include <machine/kbd.h>
74 #include <dev/sun/event_var.h>
75 #include <dev/sun/kbd_xlate.h>
76 #include <dev/sun/kbdvar.h>
77 #include <dev/sun/kbdsunvar.h>
78 #include <dev/sun/kbd_ms_ttyvar.h>
79
80 /****************************************************************
81 * Interface to the lower layer (ttycc)
82 ****************************************************************/
83
84 static int sunkbd_match(struct device *, struct cfdata *, void *);
85 static void sunkbd_attach(struct device *, struct device *, void *);
86 static void sunkbd_write_data(struct kbd_sun_softc *, int);
87 static int sunkbdiopen(struct device *, int mode);
88
89 #if NWSKBD > 0
90 void kbd_wskbd_attach(struct kbd_softc *k, int isconsole);
91 #endif
92
93 int sunkbdinput(int, struct tty *);
94 int sunkbdstart(struct tty *);
95
96 /* Default keyboard baud rate */
97 int sunkbd_bps = KBD_DEFAULT_BPS;
98
99 CFATTACH_DECL(kbd_tty, sizeof(struct kbd_sun_softc),
100 sunkbd_match, sunkbd_attach, NULL, NULL);
101
102 struct linesw sunkbd_disc =
103 { "sunkbd", 7, ttylopen, ttylclose, ttyerrio, ttyerrio, ttynullioctl,
104 sunkbdinput, sunkbdstart, nullmodem, ttpoll }; /* 7- SUNKBDDISC */
105
106
107 /*
108 * sunkbd_match: how is this tty channel configured?
109 */
110 int
111 sunkbd_match(parent, cf, aux)
112 struct device *parent;
113 struct cfdata *cf;
114 void *aux;
115 {
116 struct kbd_ms_tty_attach_args *args = aux;
117
118 if (strcmp(args->kmta_name, "keyboard") == 0)
119 return (1);
120
121 return 0;
122 }
123
124 void
125 sunkbd_attach(parent, self, aux)
126 struct device *parent, *self;
127 void *aux;
128 {
129 struct kbd_sun_softc *k = (void *) self;
130 struct kbd_ms_tty_attach_args *args = aux;
131 struct tty *tp = args->kmta_tp;
132 struct cons_channel *cc;
133
134 /* Set up the proper line discipline. */
135 ttyldisc_init();
136 if (ttyldisc_add(&sunkbd_disc, -1) == -1)
137 panic("sunkbd_attach: sunkbd_disc");
138 tp->t_linesw = &sunkbd_disc;
139 tp->t_oflag &= ~OPOST;
140 tp->t_dev = args->kmta_dev;
141
142 /* link the structures together. */
143 k->k_priv = tp;
144 tp->t_sc = (void *)k;
145
146 /* provide our middle layer with a link to the lower layer (i.e. us) */
147 k->k_deviopen = sunkbdiopen;
148 k->k_deviclose = NULL;
149 k->k_write_data = sunkbd_write_data;
150
151 /* provide upper layer with a link to our middle layer */
152 k->k_kbd.k_ops = &kbd_ops_sun;
153
154 /* alloc console input channel */
155 if ((cc = kbd_cc_alloc(&k->k_kbd)) == NULL)
156 return;
157
158 if (args->kmta_consdev) {
159 char magic[4];
160
161 /*
162 * Hookup ourselves as the console input channel
163 */
164 args->kmta_baud = sunkbd_bps;
165 args->kmta_cflag = CLOCAL|CS8;
166 cons_attach_input(cc, args->kmta_consdev);
167
168 /* Tell our parent what the console should be. */
169 args->kmta_consdev = cn_tab;
170 k->k_kbd.k_isconsole = 1;
171 printf(" (console input)");
172
173 /* Set magic to "L1-A" */
174 magic[0] = KBD_L1;
175 magic[1] = KBD_A;
176 magic[2] = 0;
177 cn_set_magic(magic);
178 } else {
179 extern void kd_attach_input(struct cons_channel *);
180
181 kd_attach_input(cc);
182 }
183
184
185 printf("\n");
186
187 #if NWSKBD > 0
188 kbd_wskbd_attach(&k->k_kbd, args->kmta_consdev != NULL);
189 #endif
190
191 /* Do this before any calls to kbd_rint(). */
192 kbd_xlate_init(&k->k_kbd.k_state);
193
194 /* Magic sequence. */
195 k->k_magic1 = KBD_L1;
196 k->k_magic2 = KBD_A;
197 }
198
199 /*
200 * Internal open routine. This really should be inside com.c
201 * But I'm putting it here until we have a generic internal open
202 * mechanism.
203 */
204 int
205 sunkbdiopen(dev, flags)
206 struct device *dev;
207 int flags;
208 {
209 struct kbd_sun_softc *k = (void *) dev;
210 struct tty *tp = (struct tty *)k->k_priv;
211 struct proc *p = curproc ? curproc : &proc0;
212 struct termios t;
213 const struct cdevsw *cdev;
214 int error;
215
216 cdev = cdevsw_lookup(tp->t_dev);
217 if (cdev == NULL)
218 return (ENXIO);
219
220 /* Open the lower device */
221 if ((error = (*cdev->d_open)(tp->t_dev, O_NONBLOCK|flags,
222 0/* ignored? */, p)) != 0)
223 return (error);
224
225 /* Now configure it for the console. */
226 tp->t_ospeed = 0;
227 t.c_ispeed = sunkbd_bps;
228 t.c_ospeed = sunkbd_bps;
229 t.c_cflag = CLOCAL|CS8;
230 (*tp->t_param)(tp, &t);
231
232 return (0);
233 }
234
235 /*
236 * TTY interface to handle input.
237 */
238 int
239 sunkbdinput(c, tp)
240 int c;
241 struct tty *tp;
242 {
243 struct kbd_sun_softc *k = (void *) tp->t_sc;
244 u_char *cc;
245 int error;
246
247
248 cc = tp->t_cc;
249
250 /*
251 * Handle exceptional conditions (break, parity, framing).
252 */
253 if ((error = ((c & TTY_ERRORMASK))) != 0) {
254 /*
255 * After garbage, flush pending input, and
256 * send a reset to resync key translation.
257 */
258 log(LOG_ERR, "%s: input error (0x%x)\n",
259 k->k_kbd.k_dev.dv_xname, c);
260 c &= TTY_CHARMASK;
261 if (!k->k_txflags & K_TXBUSY) {
262 ttyflush(tp, FREAD | FWRITE);
263 goto send_reset;
264 }
265 }
266
267 /*
268 * Check for input buffer overflow
269 */
270 if (tp->t_rawq.c_cc + tp->t_canq.c_cc >= TTYHOG) {
271 log(LOG_ERR, "%s: input overrun\n",
272 k->k_kbd.k_dev.dv_xname);
273 goto send_reset;
274 }
275
276 /* Pass this up to the "middle" layer. */
277 kbd_sun_input(k, c);
278 return (-1);
279
280 send_reset:
281 /* Send a reset to resync translation. */
282 kbd_sun_output(k, KBD_CMD_RESET);
283 return (ttstart(tp));
284
285 }
286
287 int
288 sunkbdstart(tp)
289 struct tty *tp;
290 {
291 struct kbd_sun_softc *k = (void *) tp->t_sc;
292
293 /*
294 * Transmit done. Try to send more, or
295 * clear busy and wakeup drain waiters.
296 */
297 k->k_txflags &= ~K_TXBUSY;
298 kbd_sun_start_tx(k);
299 ttstart(tp);
300 return (0);
301 }
302 /*
303 * used by kbd_sun_start_tx();
304 */
305 void
306 sunkbd_write_data(k, c)
307 struct kbd_sun_softc *k;
308 int c;
309 {
310 struct tty *tp = (struct tty *)k->k_priv;
311 int s;
312
313 s = spltty();
314 ttyoutput(c, tp);
315 ttstart(tp);
316 splx(s);
317 }
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