Style(9) cleanup to src/sys/vfs, stage 20/21: umapfs.
[dragonfly.git] / sys / dev / misc / spic / spic.c
1 /*
2  * Copyright (c) 2000  Nick Sayer
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.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * spic -- the Sony Programmable I/O Controller
27  *
28  * This device exists on most recent Sony laptops. It is the means by which
29  * you can watch the Jog Dial and some other functions.
30  *
31  * At the moment, this driver merely tries to turn the jog dial into a
32  * device that moused can park on, with the intent of supplying a Z axis
33  * and mouse button out of the jog dial. I suspect that this device will
34  * end up having to support at least 2 different minor devices: One to be
35  * the jog wheel device for moused to camp out on and the other to perform
36  * all of the other miscelaneous functions of this device. But for now,
37  * the jog wheel is all you get.
38  *
39  * At the moment, the data sent back by the device is rather primitive.
40  * It sends a single character per event:
41  * u = up, d = down -- that's the jog button
42  * l = left, r = right -- that's the dial.
43  * "left" and "right" are rather caprecious. They actually represent
44  * ccw and cw, respectively
45  *
46  * What documentation exists is thanks to Andrew Tridge, and his page at
47  * http://samba.org/picturebook/ Special thanks also to Ian Dowse, who
48  * also provided sample code upon which this driver was based.
49  *
50  * $FreeBSD: src/sys/i386/isa/spic.c,v 1.4.2.1 2002/04/15 00:52:12 will Exp $
51  * $DragonFly: src/sys/dev/misc/spic/spic.c,v 1.7 2004/05/13 23:49:17 dillon Exp $
52  */
53
54 #include <sys/param.h>
55 #include <sys/systm.h>
56 #include <sys/kernel.h>
57 #include <sys/bus.h>
58 #include <machine/bus.h>
59 #include <sys/rman.h>
60 #include <machine/resource.h>
61 #include <bus/isa/isavar.h>
62 #include <sys/poll.h>
63 #include <machine/pci_cfgreg.h>
64 #include <machine/clock.h>
65 #include <sys/tty.h>
66 #include <sys/conf.h>
67 #include <sys/fcntl.h>
68 #include <sys/dkstat.h>
69 #include <sys/malloc.h>
70 #include <sys/sysctl.h>
71 #include <sys/uio.h>
72 #include <sys/proc.h>
73
74 #include "spicreg.h"
75
76 static int spic_pollrate;
77
78 SYSCTL_INT(_machdep, OID_AUTO, spic_pollrate, CTLFLAG_RW, &spic_pollrate, 0, "")
79 ;
80
81 devclass_t spic_devclass;
82
83 static d_open_t         spicopen;
84 static d_close_t        spicclose;
85 static d_read_t         spicread;
86 static d_ioctl_t        spicioctl;
87 static d_poll_t         spicpoll;
88
89 static struct cdevsw spic_cdevsw = {
90         /* name */      "spic",
91         /* maj */       CDEV_MAJOR,
92         /* flags */     0,
93         /* port */      NULL,
94         /* clone */     NULL,
95
96         /* open */      spicopen,
97         /* close */     spicclose,
98         /* read */      spicread,
99         /* write */     nowrite,
100         /* ioctl */     spicioctl,
101         /* poll */      spicpoll,
102         /* mmap */      nommap,
103         /* strategy */  nostrategy,
104         /* dump */      nodump,
105         /* psize */     nopsize
106 };
107
108 #define SCBUFLEN 128
109
110 struct spic_softc {
111         u_short sc_port_addr;
112         u_char sc_intr;
113         struct resource *sc_port_res,*sc_intr_res;
114         int     sc_port_rid,sc_intr_rid;
115         int sc_opened;
116         int sc_sleeping;
117         int sc_buttonlast;
118         struct callout_handle sc_timeout_ch;
119         device_t sc_dev;
120         struct selinfo sc_rsel;
121         u_char sc_buf[SCBUFLEN];
122         int sc_count;
123         int sc_model;
124 };
125
126 static void
127 write_port1(struct spic_softc *sc, u_char val)
128 {
129         DELAY(10);
130         outb(sc->sc_port_addr, val);
131 }
132
133 static void
134 write_port2(struct spic_softc *sc, u_char val)
135 {
136         DELAY(10);
137         outb(sc->sc_port_addr + 4, val);
138 }
139
140 static u_char
141 read_port1(struct spic_softc *sc)
142 {
143         DELAY(10);
144         return inb(sc->sc_port_addr);
145 }
146
147 static u_char
148 read_port2(struct spic_softc *sc)
149 {
150         DELAY(10);
151         return inb(sc->sc_port_addr + 4);
152 }
153
154 static u_char
155 read_port_cst(struct spic_softc *sc)
156 {
157         DELAY(10);
158         return inb(SPIC_CST_IOPORT);
159 }
160
161 static void
162 busy_wait(struct spic_softc *sc)
163 {
164         int i=0;
165
166         while(read_port2(sc) & 2) {
167                 DELAY(10);
168                 if (i++>10000) {
169                         printf("spic busy wait abort\n");
170                         return;
171                 }
172         }
173 }
174
175 static void
176 busy_wait_cst(struct spic_softc *sc, int mask)
177 {
178         int i=0;
179
180         while(read_port_cst(sc) & mask) {
181                 DELAY(10);
182                 if (i++>10000) {
183                         printf("spic busy wait abort\n");
184                         return;
185                 }
186         }
187 }
188
189 static u_char
190 spic_call1(struct spic_softc *sc, u_char dev) {
191         busy_wait(sc);
192         write_port2(sc, dev);
193         read_port2(sc);
194         return read_port1(sc);
195 }
196
197 static u_char
198 spic_call2(struct spic_softc *sc, u_char dev, u_char fn)
199 {
200         busy_wait(sc);
201         write_port2(sc, dev);
202         busy_wait(sc);
203         write_port1(sc, fn);
204         return read_port1(sc);
205 }
206
207 static void
208 spic_ecrset(struct spic_softc *sc, u_int16_t addr, u_int16_t value)
209 {
210         busy_wait_cst(sc, 3);
211         outb(SPIC_CST_IOPORT, 0x81);
212         busy_wait_cst(sc, 2);
213         outb(SPIC_DATA_IOPORT, addr);
214         busy_wait_cst(sc, 2);
215         outb(SPIC_DATA_IOPORT, value);
216         busy_wait_cst(sc, 2);
217 }
218
219 static void
220 spic_type2_srs(struct spic_softc *sc)
221 {
222         spic_ecrset(sc, SPIC_SHIB, (sc->sc_port_addr & 0xFF00) >> 8);
223         spic_ecrset(sc, SPIC_SLOB,  sc->sc_port_addr & 0x00FF);
224         spic_ecrset(sc, SPIC_SIRQ,  0x00); /* using polling mode (IRQ=0)*/
225         DELAY(10);
226 }
227
228 static int
229 spic_probe(device_t dev)
230 {
231         struct spic_softc *sc;
232         u_char t, spic_irq;
233
234         sc = device_get_softc(dev);
235
236         /*
237          * We can only have 1 of these. Attempting to probe for a unit 1
238          * will destroy the work we did for unit 0
239          */
240         if (device_get_unit(dev))
241                 return ENXIO;
242
243
244         bzero(sc, sizeof(struct spic_softc));
245
246         if (!(sc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
247                 &sc->sc_port_rid, 0, ~0, 5, RF_ACTIVE))) {
248                 device_printf(dev,"Couldn't map I/O\n");
249                 return ENXIO;
250         }
251         sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res);
252
253 #ifdef notyet
254         if (!(sc->sc_intr_res = bus_alloc_resource(dev, SYS_RES_IRQ,
255                 &sc->sc_intr_rid, 0, ~0, 1, RF_ACTIVE))) {
256                 device_printf(dev,"Couldn't map IRQ\n");
257                 bus_release_resource(dev, SYS_RES_IOPORT,
258                         sc->sc_port_rid, sc->sc_port_res);
259                 return ENXIO;
260         }
261         sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res);
262
263         switch (sc->sc_intr) {
264                 case 0: spic_irq = 3; break;
265                 case 5: spic_irq = 0; break;
266                 case 0xa: spic_irq = 1; break;
267                 case 0xb: spic_irq = 2; break;
268                 default: device_printf(dev,"Invalid IRQ\n");
269                         bus_release_resource(dev, SYS_RES_IOPORT,
270                                 sc->sc_port_rid, sc->sc_port_res);
271                         bus_release_resource(dev, SYS_RES_IRQ,
272                                 sc->sc_intr_rid, sc->sc_intr_res);
273                         return ENXIO;
274         }
275 #else
276         spic_irq = 3;
277 #endif
278
279 #if 0
280         if (sc->sc_port_addr != 0x10A0) {
281                 bus_release_resource(dev, SYS_RES_IOPORT,
282                         sc->sc_port_rid, sc->sc_port_res);
283                 bus_release_resource(dev, SYS_RES_IRQ,
284                         sc->sc_intr_rid, sc->sc_intr_res);
285                 return ENXIO;
286         }
287 #endif
288
289         /* PIIX4 chipset at least? */
290         if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) ==
291                 PIIX4_DEVID) {
292                 sc->sc_model = SPIC_DEVICE_MODEL_TYPE1;
293         } else {
294                 /* For newer VAIOs (R505, SRX7, ...) */
295                 sc->sc_model = SPIC_DEVICE_MODEL_TYPE2;
296         }
297
298         /*
299          * This is an ugly hack. It is necessary until ACPI works correctly.
300          *
301          * The SPIC consists of 2 registers. They are mapped onto I/O by the
302          * PIIX4's General Device 10 function. There is also an interrupt
303          * control port at a somewhat magic location, but this first pass is
304          * polled.
305          *
306          * So the first thing we need to do is map the G10 space in.
307          *
308          */
309
310         /* Enable ACPI mode to get Fn key events */
311         /* XXX This may slow down your VAIO if ACPI is not supported in the kernel.
312         outb(0xb2, 0xf0);
313          */
314
315         device_printf(dev,"device model type = %d\n", sc->sc_model);
316         
317         if(sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) {
318                 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A,
319                                 sc->sc_port_addr, 2);
320                 t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1);
321                 t &= 0xf0;
322                 t |= 4;
323                 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1);
324                 outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT));
325                 t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1);
326                 t &= 0x1f;
327                 t |= 0xc0;
328                 pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1);
329         } else {
330                 spic_type2_srs(sc);
331         }
332
333         /*
334          * XXX: Should try and see if there's anything actually there.
335          */
336
337         device_set_desc(dev, "Sony Programmable I/O Controller");
338
339         return 0;
340 }
341
342 static int
343 spic_attach(device_t dev)
344 {
345         struct spic_softc *sc;
346
347         sc = device_get_softc(dev);
348
349         sc->sc_dev = dev;
350         
351         spic_pollrate = (hz/50); /* Every 50th of a second */
352
353         spic_call1(sc, 0x82);
354         spic_call2(sc, 0x81, 0xff);
355         spic_call1(sc, 0x92);
356
357         /* There can be only one */
358         make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial");
359
360         return 0;
361 }
362
363 static void
364 spictimeout(void *arg)
365 {
366         struct spic_softc *sc = arg;
367         u_char b, event, param;
368         int j;
369
370         if (!sc->sc_opened) {
371                 device_printf(sc->sc_dev, "timeout called while closed!\n");
372                 return;
373         }
374
375         event = read_port2(sc);
376         param = read_port1(sc);
377
378         if ((event != 4) && (!(event & 0x1)))
379                 switch(event) {
380                         case 0x10: /* jog wheel event (type1) */
381                                 if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) {
382                                         b = !!(param & 0x40);
383                                         if (b != sc->sc_buttonlast) {
384                                                 sc->sc_buttonlast = b;
385                                                 sc->sc_buf[sc->sc_count++] =
386                                                         b?'d':'u';
387                                         }
388                                         j = (param & 0xf) | ((param & 0x10)? ~0xf:0);
389                                         if (j<0)
390                                                 while(j++!=0) {
391                                                         sc->sc_buf[sc->sc_count++] =
392                                                                 'l';
393                                                 }
394                                         else if (j>0)
395                                                 while(j--!=0) {
396                                                         sc->sc_buf[sc->sc_count++] =
397                                                                 'r';
398                                                 }
399                                 }
400                                 break;
401                         case 0x08: /* jog wheel event (type2) */
402                         case 0x00: 
403                                 /* SPIC_DEVICE_MODEL_TYPE2 returns jog wheel event=0x00 */
404                                 if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE2) {
405                                         b = !!(param & 0x40);
406                                         if (b != sc->sc_buttonlast) {
407                                                 sc->sc_buttonlast = b;
408                                                 sc->sc_buf[sc->sc_count++] =
409                                                         b?'d':'u';
410                                         }
411                                         j = (param & 0xf) | ((param & 0x10)? ~0xf:0);
412                                         if (j<0)
413                                                 while(j++!=0) {
414                                                         sc->sc_buf[sc->sc_count++] =
415                                                                 'l';
416                                                 }
417                                         else if (j>0)
418                                                 while(j--!=0) {
419                                                         sc->sc_buf[sc->sc_count++] =
420                                                                 'r';
421                                                 }
422                                 }
423                                 break;
424                         case 0x60: /* Capture button */
425                                 printf("Capture button event: %x\n",param);
426                                 break;
427                         case 0x30: /* Lid switch */
428                                 printf("Lid switch event: %x\n",param);
429                                 break;
430                         default:
431                                 printf("Unknown event: event %02x param %02x\n", event, param);
432                                 break;
433                 }
434         else {
435                 /* No event. Wait some more */
436                 sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate);
437                 return;
438         }
439
440         if (sc->sc_count) {
441                 if (sc->sc_sleeping) {
442                         sc->sc_sleeping = 0;
443                         wakeup((caddr_t) sc);
444                 }
445                 selwakeup(&sc->sc_rsel);
446         }
447         spic_call2(sc, 0x81, 0xff); /* Clear event */
448
449         sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate);
450 }
451
452 static int
453 spicopen(dev_t dev, int flag, int fmt, struct thread *td)
454 {
455         struct spic_softc *sc;
456
457         sc = devclass_get_softc(spic_devclass, 0);
458
459         if (sc->sc_opened)
460                 return EBUSY;
461
462         sc->sc_opened++;
463         sc->sc_count=0;
464
465         /* Start the polling */
466         timeout(spictimeout, sc, spic_pollrate);
467         return 0;
468 }
469
470 static int
471 spicclose(dev_t dev, int flag, int fmt, struct thread *td)
472 {
473         struct spic_softc *sc;
474
475         sc = devclass_get_softc(spic_devclass, 0);
476
477         /* Stop polling */
478         untimeout(spictimeout, sc, sc->sc_timeout_ch);
479         sc->sc_opened = 0;
480         return 0;
481 }
482
483 static int
484 spicread(dev_t dev, struct uio *uio, int flag)
485 {
486         struct spic_softc *sc;
487         int l, s, error;
488         u_char buf[SCBUFLEN];
489
490         sc = devclass_get_softc(spic_devclass, 0);
491
492         if (uio->uio_resid <= 0) /* What kind of a read is this?! */
493                 return 0;
494
495         s = spltty();
496         while (!(sc->sc_count)) {
497                 sc->sc_sleeping=1;
498                 error = tsleep((caddr_t) sc, PCATCH, "jogrea", 0);
499                 sc->sc_sleeping=0;
500                 if (error) {
501                         splx(s);
502                         return error;
503                 }
504         }
505         splx(s);
506
507         s = spltty();
508         l = min(uio->uio_resid, sc->sc_count);
509         bcopy(sc->sc_buf, buf, l);
510         sc->sc_count -= l;
511         bcopy(sc->sc_buf + l, sc->sc_buf, l);
512         splx(s);
513         return uiomove(buf, l, uio);
514
515 }
516
517 static int
518 spicioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
519 {
520         struct spic_softc *sc;
521
522         sc = devclass_get_softc(spic_devclass, 0);
523
524         return EIO;
525 }
526
527 static int
528 spicpoll(dev_t dev, int events, struct thread *td)
529 {
530         struct spic_softc *sc;
531         struct proc *p;
532         struct proc *p1;
533         int revents = 0, s;
534
535         p = td->td_proc;
536         KKASSERT(p);
537
538         sc = devclass_get_softc(spic_devclass, 0);
539         s = spltty();
540         if (events & (POLLIN | POLLRDNORM)) {
541                 if (sc->sc_count)
542                         revents |= events & (POLLIN | POLLRDNORM);
543                 else {
544                         if (sc->sc_rsel.si_pid && (p1=pfind(sc->sc_rsel.si_pid))
545                                         && p1->p_wchan == (caddr_t)&selwait)
546                                 sc->sc_rsel.si_flags = SI_COLL;
547                         else
548                                 sc->sc_rsel.si_pid = p->p_pid;
549                 }
550         }
551         splx(s);
552
553         return revents;
554 }
555
556
557 static device_method_t spic_methods[] = {
558         DEVMETHOD(device_probe,         spic_probe),
559         DEVMETHOD(device_attach,        spic_attach),
560
561         { 0, 0 }
562 };
563
564 static driver_t spic_driver = {
565         "spic",
566         spic_methods,
567         sizeof(struct spic_softc),
568 };
569
570 DRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0);
571