sys/arch/macppc/dev/ofcons.c

   1 /*      $NetBSD: ofcons.c,v 1.23 2008/06/13 11:54:31 cegger Exp $       */
   2
   3 /*
   4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
   5  * Copyright (C) 1995, 1996 TooLs GmbH.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by TooLs GmbH.
  19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: ofcons.c,v 1.23 2008/06/13 11:54:31 cegger Exp $");
  36
  37 #include <sys/param.h>
  38 #include <sys/conf.h>
  39 #include <sys/device.h>
  40 #include <sys/proc.h>
  41 #include <sys/systm.h>
  42 #include <sys/tty.h>
  43 #include <sys/kauth.h>
  44
  45 #include <dev/cons.h>
  46 #include <dev/ofw/openfirm.h>
  47
  48 #include <dev/pci/pcireg.h>
  49 #include <dev/pci/pcivar.h>
  50
  51 #include <machine/adbsys.h>
  52
  53 #include <machine/autoconf.h>
  54
  55 #include "adb.h"
  56
  57 struct ofcons_softc {
  58         struct device of_dev;
  59         struct tty *of_tty;
  60 };
  61
  62 #define OFBURSTLEN      128     /* max number of bytes to write in one chunk */
  63
  64 static int stdin, stdout;
  65
  66 static int ofcmatch(struct device *, struct cfdata *, void *);
  67 static void ofcattach(struct device *, struct device *, void *);
  68
  69 CFATTACH_DECL(macofcons, sizeof(struct ofcons_softc),
  70     ofcmatch, ofcattach, NULL, NULL);
  71
  72 extern struct cfdriver macofcons_cd;
  73
  74 dev_type_open(ofcopen);
  75 dev_type_close(ofcclose);
  76 dev_type_read(ofcread);
  77 dev_type_write(ofcwrite);
  78 dev_type_ioctl(ofcioctl);
  79 dev_type_tty(ofctty);
  80 dev_type_poll(ofcpoll);
  81
  82 const struct cdevsw macofcons_cdevsw = {
  83         ofcopen, ofcclose, ofcread, ofcwrite, ofcioctl,
  84         nostop, ofctty, ofcpoll, nommap, ttykqfilter, D_TTY
  85 };
  86
  87 /* For polled ADB mode */
  88 #if NADB > 0
  89 static int polledkey;
  90 extern int adb_polling;
  91 #endif /* NADB */
  92
  93 static void ofcstart(struct tty *);
  94 static int ofcparam(struct tty *, struct termios *);
  95 static int ofcons_probe(void);
  96
  97 static int
  98 ofcmatch(struct device *parent, struct cfdata *match, void *aux)
  99 {
 100         struct pci_attach_args *pa = aux;
 101         static int attached = 0;
 102
 103         if (attached)
 104                 return 0;
 105
 106         if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY)
 107                 return 0;
 108
 109         if (!ofcons_probe())
 110                 return 0;
 111
 112         attached = 1;
 113         return 1;
 114 }
 115
 116 static void
 117 ofcattach(struct device *parent, struct device *self, void *aux)
 118 {
 119         printf("\n");
 120 }
 121
 122 int
 123 ofcopen(dev_t dev, int flag, int mode, struct lwp *l)
 124 {
 125         struct ofcons_softc *sc;
 126         struct tty *tp;
 127
 128         sc = device_lookup_private(&macofcons_cd, minor(dev));
 129         if (!sc)
 130                 return ENXIO;
 131         if (!(tp = sc->of_tty))
 132                 sc->of_tty = tp = ttymalloc();
 133         tp->t_oproc = ofcstart;
 134         tp->t_param = ofcparam;
 135         tp->t_dev = dev;
 136         if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
 137                 return (EBUSY);
 138         if (!(tp->t_state & TS_ISOPEN)) {
 139                 ttychars(tp);
 140                 tp->t_iflag = TTYDEF_IFLAG;
 141                 tp->t_oflag = TTYDEF_OFLAG;
 142                 tp->t_cflag = TTYDEF_CFLAG;
 143                 tp->t_lflag = TTYDEF_LFLAG;
 144                 tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
 145                 ofcparam(tp, &tp->t_termios);
 146                 ttsetwater(tp);
 147         }
 148         tp->t_state |= TS_CARR_ON;
 149
 150         return (*tp->t_linesw->l_open)(dev, tp);
 151 }
 152
 153 int
 154 ofcclose(dev_t dev, int flag, int mode, struct lwp *l)
 155 {
 156         struct ofcons_softc *sc = device_lookup_private(&macofcons_cd, minor(dev));
 157         struct tty *tp = sc->of_tty;
 158
 159         (*tp->t_linesw->l_close)(tp, flag);
 160         ttyclose(tp);
 161         return 0;
 162 }
 163
 164 int
 165 ofcread(dev_t dev, struct uio *uio, int flag)
 166 {
 167         struct ofcons_softc *sc = device_lookup_private(&macofcons_cd, minor(dev));
 168         struct tty *tp = sc->of_tty;
 169
 170         return (*tp->t_linesw->l_read)(tp, uio, flag);
 171 }
 172
 173 int
 174 ofcwrite(dev_t dev, struct uio *uio, int flag)
 175 {
 176         struct ofcons_softc *sc = device_lookup_private(&macofcons_cd, minor(dev));
 177         struct tty *tp = sc->of_tty;
 178
 179         return (*tp->t_linesw->l_write)(tp, uio, flag);
 180 }
 181
 182 int
 183 ofcpoll(dev_t dev, int events, struct lwp *l)
 184 {
 185         struct ofcons_softc *sc = device_lookup_private(&macofcons_cd, minor(dev));
 186         struct tty *tp = sc->of_tty;
 187
 188         return ((*tp->t_linesw->l_poll)(tp, events, l));
 189 }
 190
 191 int
 192 ofcioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
 193 {
 194         struct ofcons_softc *sc = device_lookup_private(&macofcons_cd, minor(dev));
 195         struct tty *tp = sc->of_tty;
 196         int error;
 197
 198         if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, l)) != EPASSTHROUGH)
 199                 return error;
 200         return ttioctl(tp, cmd, data, flag, l);
 201 }
 202
 203 struct tty *
 204 ofctty(dev_t dev)
 205 {
 206         struct ofcons_softc *sc = device_lookup_private(&macofcons_cd, minor(dev));
 207
 208         return sc->of_tty;
 209 }
 210
 211 static void
 212 ofcstart(struct tty *tp)
 213 {
 214         struct clist *cl;
 215         int s, len;
 216         u_char buf[OFBURSTLEN];
 217
 218         s = spltty();
 219         if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
 220                 splx(s);
 221                 return;
 222         }
 223         tp->t_state |= TS_BUSY;
 224         splx(s);
 225         cl = &tp->t_outq;
 226         len = q_to_b(cl, buf, OFBURSTLEN);
 227         OF_write(stdout, buf, len);
 228         s = spltty();
 229         tp->t_state &= ~TS_BUSY;
 230         if (ttypull(tp)) {
 231                 tp->t_state |= TS_TIMEOUT;
 232                 callout_schedule(&tp->t_rstrt_ch, 1);
 233         }
 234         splx(s);
 235 }
 236
 237 static int
 238 ofcparam(struct tty *tp, struct termios *t)
 239 {
 240         tp->t_ispeed = t->c_ispeed;
 241         tp->t_ospeed = t->c_ospeed;
 242         tp->t_cflag = t->c_cflag;
 243         return 0;
 244 }
 245
 246 static int
 247 ofcons_probe(void)
 248 {
 249         int chosen;
 250
 251         if (stdout)
 252                 return 1;
 253         if ((chosen = OF_finddevice("/chosen")) == -1)
 254                 return 0;
 255         if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) !=
 256                         sizeof(stdin) ||
 257             OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) !=
 258                         sizeof(stdout))
 259                 return 0;
 260
 261         return 1;
 262 }
 263
 264 /*
 265  * Console support functions
 266  */
 267 static void
 268 ofccnprobe(struct consdev *cd)
 269 {
 270         int maj;
 271
 272         if (!ofcons_probe())
 273                 return;
 274
 275         maj = cdevsw_lookup_major(&macofcons_cdevsw);
 276
 277         printf("major for ofcons: %d\n", maj);
 278
 279         cd->cn_dev = makedev(maj, 0);
 280         cd->cn_pri = CN_INTERNAL;
 281 }
 282
 283 static void
 284 ofccninit(struct consdev *cd)
 285 {
 286 }
 287
 288 static int
 289 ofccngetc(dev_t dev)
 290 {
 291 #if NADB > 0
 292         int s;
 293         extern void adb_intr_cuda(void);        /* in adb_direct.c */
 294
 295         s = splhigh();
 296
 297         polledkey = -1;
 298         adb_polling = 1;
 299
 300         while (polledkey == -1)
 301                 adb_intr_cuda();
 302
 303         adb_polling = 0;
 304
 305         splx(s);
 306         return polledkey;
 307 #else
 308         unsigned char ch = '\0';
 309         int l;
 310
 311         while ((l = OF_read(stdin, &ch, 1)) != 1)
 312                 if (l != -2 && l != 0)
 313                         return -1;
 314         return ch;
 315 #endif
 316 }
 317
 318 static void
 319 ofccnputc(dev_t dev, int c)
 320 {
 321         char ch = c;
 322
 323         OF_write(stdout, &ch, 1);
 324 }
 325
 326 static void
 327 ofccnpollc(dev_t dev, int on)
 328 {
 329 }
 330
 331 struct consdev consdev_ofcons = {
 332         ofccnprobe,
 333         ofccninit,
 334         ofccngetc,
 335         ofccnputc,
 336         ofccnpollc,
 337         NULL,
 338 };
 339
 340 struct consdev *cn_tab = &consdev_ofcons;