zrc.c revision 1.9 1 /* $NetBSD: zrc.c,v 1.9 2012/10/27 17:18:14 chs Exp $ */
2 /* $OpenBSD: zaurus_remote.c,v 1.1 2005/11/17 05:26:31 uwe Exp $ */
3
4 /*
5 * Copyright (c) 2005 Uwe Stuehler <uwe (at) openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <sys/cdefs.h>
21 __KERNEL_RCSID(0, "$NetBSD: zrc.c,v 1.9 2012/10/27 17:18:14 chs Exp $");
22
23 #include <sys/param.h>
24 #include <sys/device.h>
25 #include <sys/kernel.h>
26 #include <sys/callout.h>
27 #include <sys/systm.h>
28
29 #include <dev/wscons/wsconsio.h>
30 #include <dev/wscons/wskbdvar.h>
31 #include <dev/wscons/wsksymdef.h>
32 #include <dev/wscons/wsksymvar.h>
33
34 #include <arm/xscale/pxa2x0reg.h>
35 #include <arm/xscale/pxa2x0_gpio.h>
36
37 #include <machine/intr.h>
38
39 #include <zaurus/zaurus/zaurus_reg.h>
40 #include <zaurus/zaurus/zaurus_var.h>
41 #include <zaurus/dev/zsspvar.h>
42 #include <zaurus/dev/scoopvar.h>
43 #include <zaurus/dev/ioexpvar.h>
44
45 #define RESCAN_INTERVAL (hz/100)
46
47 #define KEY_RELEASE 0 /* button release */
48 #define KEY_VOL_DOWN 1
49 #define KEY_MUTE 2
50 #define KEY_REWIND 3
51 #define KEY_VOL_UP 4
52 #define KEY_FORWARD 5
53 #define KEY_PLAY 6
54 #define KEY_STOP 7
55 #define KEY_EARPHONE 8
56
57 #ifdef DEBUG
58 static const char *zrc_keyname[] = {
59 "(release)", "volume down", "mute", "rewind", "volume up",
60 "forward", "play", "stop", "(earphone)"
61 };
62 #endif
63
64 struct zrc_akey {
65 int min; /* minimum ADC value or INT_MIN */
66 int key; /* remote control key number */
67 };
68
69 /* Values match the resistors in the CE-RH2 remote control. */
70 static const struct zrc_akey zrc_akeytab_c3000[] = {
71 { 238, KEY_RELEASE },
72 { 202, KEY_VOL_DOWN },
73 { 168, KEY_MUTE },
74 { 135, KEY_REWIND },
75 { 105, KEY_VOL_UP },
76 { 74, KEY_FORWARD },
77 { 42, KEY_PLAY },
78 { 12, KEY_STOP },
79 { INT_MIN, KEY_EARPHONE }
80 };
81
82 static const struct zrc_akey *zrc_akeytab = zrc_akeytab_c3000;
83
84 struct zrc_softc {
85 device_t sc_dev;
86 struct callout sc_to;
87 void *sc_ih;
88 int sc_key; /* being scanned */
89 int sc_scans; /* rescan counter */
90 int sc_noise; /* discard if too noisy? */
91 int sc_keydown; /* currently pressed key */
92 device_t sc_wskbddev;
93 #ifdef WSDISPLAY_COMPAT_RAWKBD
94 int sc_rawkbd;
95 #endif
96 };
97
98 static int zrc_match(device_t, cfdata_t, void *);
99 static void zrc_attach(device_t, device_t, void *);
100
101 CFATTACH_DECL_NEW(zrc, sizeof(struct zrc_softc),
102 zrc_match, zrc_attach, NULL, NULL);
103
104 static int zrc_finalize(device_t);
105 static int zrc_intr(void *);
106 static void zrc_timeout(void *);
107 static int zrc_scan(void);
108 static void zrc_input(struct zrc_softc *, int, int);
109
110 static int zrc_enable(void *, int);
111 static void zrc_set_leds(void *, int);
112 static int zrc_ioctl(void *, u_long, void *, int, struct lwp *);
113
114 struct wskbd_accessops zrc_accessops = {
115 zrc_enable,
116 zrc_set_leds,
117 zrc_ioctl,
118 };
119
120 #define KC(n) KS_KEYCODE(n)
121
122 /* XXX what keys should be generated in translated mode? */
123 static const keysym_t zrc_keydesc[] = {
124 KC(KEY_VOL_DOWN), KS_Cmd_VolumeUp,
125 KC(KEY_MUTE), KS_Cmd_VolumeToggle,
126 KC(KEY_REWIND), KS_b,
127 KC(KEY_VOL_UP), KS_Cmd_VolumeDown,
128 KC(KEY_FORWARD), KS_f,
129 KC(KEY_PLAY), KS_p,
130 KC(KEY_STOP), KS_s,
131 };
132
133 #ifdef WSDISPLAY_COMPAT_RAWKBD
134 #define RAWKEY_AudioRewind 0xa0
135 #define RAWKEY_AudioForward 0xa1
136 #define RAWKEY_AudioPlay 0xa2
137 #define RAWKEY_AudioStop 0xa3
138 static const keysym_t zrc_xt_keymap[] = {
139 /* KC(KEY_RELEASE), */ RAWKEY_Null,
140 /* KC(KEY_VOL_DOWN), */ RAWKEY_AudioLower,
141 /* KC(KEY_MUTE), */ RAWKEY_AudioMute,
142 /* KC(KEY_REWIND), */ RAWKEY_AudioRewind,
143 /* KC(KEY_VOL_UP), */ RAWKEY_AudioRaise,
144 /* KC(KEY_FORWARD), */ RAWKEY_AudioForward,
145 /* KC(KEY_PLAY), */ RAWKEY_AudioPlay,
146 /* KC(KEY_STOP), */ RAWKEY_AudioStop,
147 };
148 #endif
149
150 static const struct wscons_keydesc zrc_keydesctab[] = {
151 {KB_US, 0, sizeof(zrc_keydesc)/sizeof(keysym_t), zrc_keydesc},
152 {0, 0, 0, 0}
153 };
154
155 struct wskbd_mapdata zrc_keymapdata = {
156 zrc_keydesctab, KB_US
157 };
158
159 #undef KC
160
161 static int
162 zrc_match(device_t parent, cfdata_t cf, void *aux)
163 {
164
165 if (ZAURUS_ISC1000 || ZAURUS_ISC3000)
166 return 1;
167 return 0;
168 }
169
170 static void
171 zrc_attach(device_t parent, device_t self, void *aux)
172 {
173 struct zrc_softc *sc = device_private(self);
174 struct wskbddev_attach_args a;
175
176 sc->sc_dev = self;
177
178 aprint_normal(": CE-RH2 remote control\n");
179 aprint_naive("\n");
180
181 /* Configure remote control interrupt handling. */
182 callout_init(&sc->sc_to, 0);
183 callout_setfunc(&sc->sc_to, zrc_timeout, sc);
184
185 /* Establish interrput */
186 pxa2x0_gpio_set_function(C3000_RC_IRQ_PIN, GPIO_IN);
187 sc->sc_ih = pxa2x0_gpio_intr_establish(C3000_RC_IRQ_PIN,
188 IST_EDGE_BOTH, IPL_BIO, zrc_intr, sc);
189 if (sc->sc_ih == NULL) {
190 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt.\n");
191 return;
192 }
193
194 /* defer enabling pullup until ioexp or scoop is attached */
195 config_finalize_register(self, zrc_finalize);
196
197 sc->sc_keydown = KEY_RELEASE;
198
199 a.console = 0;
200 a.keymap = &zrc_keymapdata;
201 a.accessops = &zrc_accessops;
202 a.accesscookie = sc;
203
204 sc->sc_wskbddev = config_found(self, &a, wskbddevprint);
205 }
206
207 static int
208 zrc_finalize(device_t dv)
209 {
210
211 /* Enable the pullup while waiting for an interrupt. */
212 if (ZAURUS_ISC1000)
213 ioexp_akin_pullup(1);
214 else
215 scoop_akin_pullup(1);
216
217 return 0;
218 }
219
220 static int
221 zrc_intr(void *v)
222 {
223 struct zrc_softc *sc = v;
224
225 /* just return if remote control isn't present */
226
227 pxa2x0_gpio_intr_mask(sc->sc_ih);
228 if (ZAURUS_ISC1000)
229 ioexp_akin_pullup(0);
230 else
231 scoop_akin_pullup(0);
232 sc->sc_key = zrc_scan();
233 sc->sc_scans = 0;
234 sc->sc_noise = 0;
235 callout_schedule(&sc->sc_to, RESCAN_INTERVAL);
236
237 return 1;
238 }
239
240 static void
241 zrc_timeout(void *v)
242 {
243 struct zrc_softc *sc = v;
244 int key;
245
246 key = zrc_scan();
247 switch (sc->sc_scans) {
248 case 0:
249 case 1:
250 case 2:
251 /* wait for a stable read */
252 if (sc->sc_key == key)
253 sc->sc_scans++;
254 else {
255 sc->sc_key = key;
256 sc->sc_scans = 0;
257 sc->sc_noise++;
258 }
259 callout_schedule(&sc->sc_to, RESCAN_INTERVAL);
260 break;
261 case 3:
262 /* generate key press event */
263 if (sc->sc_key != key) {
264 key = sc->sc_key;
265 sc->sc_noise++;
266 }
267 sc->sc_scans++;
268 switch (key) {
269 case KEY_EARPHONE:
270 case KEY_RELEASE:
271 sc->sc_scans = 6;
272 break;
273 default:
274 #ifdef DEBUG
275 printf("%s: %s pressed (%d noise)\n",
276 device_xname(sc->sc_dev),
277 zrc_keyname[key], sc->sc_noise);
278 #endif
279 sc->sc_keydown = key;
280 sc->sc_noise = 0;
281 zrc_input(sc, key, 1);
282 break;
283 }
284 callout_schedule(&sc->sc_to, RESCAN_INTERVAL);
285 break;
286 case 4:
287 case 5:
288 /* wait for key release, permit noise */
289 if (sc->sc_key == key) {
290 if (sc->sc_scans == 5)
291 sc->sc_noise++;
292 sc->sc_scans = 4;
293 } else
294 sc->sc_scans++;
295 callout_schedule(&sc->sc_to, RESCAN_INTERVAL);
296 break;
297 case 6:
298 /* generate key release event */
299 if (sc->sc_keydown != KEY_RELEASE) {
300 zrc_input(sc, sc->sc_keydown, 0);
301 #ifdef DEBUG
302 printf("%s: %s released (%d noise)\n",
303 device_xname(sc->sc_dev),
304 zrc_keyname[sc->sc_keydown], sc->sc_noise);
305 #endif
306 sc->sc_keydown = KEY_RELEASE;
307 }
308 /* FALLTHROUGH */
309 default:
310 /* unmask interrupt again */
311 callout_stop(&sc->sc_to);
312 sc->sc_scans = 7;
313 if (ZAURUS_ISC1000)
314 ioexp_akin_pullup(1);
315 else
316 scoop_akin_pullup(1);
317 pxa2x0_gpio_intr_unmask(sc->sc_ih);
318 }
319 }
320
321 static int
322 zrc_scan(void)
323 {
324 int val;
325 int i;
326
327 /* XXX MAX1111 command word - also appears in zaurus_apm.c */
328 #define MAXCTRL_PD0 (1<<0)
329 #define MAXCTRL_PD1 (1<<1)
330 #define MAXCTRL_SGL (1<<2)
331 #define MAXCTRL_UNI (1<<3)
332 #define MAXCTRL_SEL_SHIFT 4
333 #define MAXCTRL_STR (1<<7)
334
335 #define C3000_ADCCH_ZRC 0
336 val = zssp_read_max1111(MAXCTRL_PD0 | MAXCTRL_PD1 | MAXCTRL_SGL |
337 MAXCTRL_UNI | (C3000_ADCCH_ZRC << MAXCTRL_SEL_SHIFT) |
338 MAXCTRL_STR);
339 for (i = 0; zrc_akeytab[i].min != INT_MIN; i++)
340 if (val >= zrc_akeytab[i].min)
341 break;
342 return zrc_akeytab[i].key;
343 }
344
345 static void
346 zrc_input(struct zrc_softc *sc, int key, int down)
347 {
348 u_int type = down ? WSCONS_EVENT_KEY_DOWN : WSCONS_EVENT_KEY_UP;
349 int s;
350
351 s = spltty();
352
353 #ifdef WSDISPLAY_COMPAT_RAWKBD
354 if (sc->sc_rawkbd) {
355 int c;
356 u_char cbuf[2];
357 int ncbuf = 0;
358
359 c = zrc_xt_keymap[key];
360 if (c & 0x80)
361 cbuf[ncbuf++] = 0xe0;
362 cbuf[ncbuf] = c & 0x7f;
363
364 if (!down)
365 cbuf[ncbuf] |= 0x80;
366 ncbuf++;
367
368 wskbd_rawinput(sc->sc_wskbddev, cbuf, ncbuf);
369 } else
370 #endif
371 wskbd_input(sc->sc_wskbddev, type, key);
372
373 splx(s);
374 }
375
376 static int
377 zrc_enable(void *v, int on)
378 {
379
380 return 0;
381 }
382
383 static void
384 zrc_set_leds(void *v, int on)
385 {
386
387 /* Nothing to do */
388 }
389
390 static int
391 zrc_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
392 {
393 #ifdef WSDISPLAY_COMPAT_RAWKBD
394 struct zrc_softc *sc = v;
395 #endif
396
397 switch (cmd) {
398 case WSKBDIO_GTYPE:
399 *(int *)data = WSKBD_TYPE_ZAURUS;
400 return 0;
401 case WSKBDIO_SETLEDS:
402 return 0;
403 case WSKBDIO_GETLEDS:
404 *(int *)data = 0;
405 return 0;
406 #ifdef WSDISPLAY_COMPAT_RAWKBD
407 case WSKBDIO_SETMODE:
408 sc->sc_rawkbd = (*(int *)data == WSKBD_RAW);
409 return 0;
410 #endif
411 }
412 return EPASSTHROUGH;
413 }
414