zrc.c revision 1.4 1 /* $NetBSD: zrc.c,v 1.4 2007/07/09 20:52:41 ad 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 1.4 2007/07/09 20:52:41 ad 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/dev/scoopvar.h>
40 #include <zaurus/dev/zsspvar.h>
41 #include <zaurus/zaurus/zaurus_reg.h>
42 #include <zaurus/zaurus/zaurus_var.h>
43
44 #define RESCAN_INTERVAL (hz/100)
45
46 #define KEY_RELEASE 0 /* button release */
47 #define KEY_VOL_DOWN 1
48 #define KEY_MUTE 2
49 #define KEY_REWIND 3
50 #define KEY_VOL_UP 4
51 #define KEY_FORWARD 5
52 #define KEY_PLAY 6
53 #define KEY_STOP 7
54 #define KEY_EARPHONE 8
55
56 #ifdef DEBUG
57 static const char *zrc_keyname[] = {
58 "(release)", "volume down", "mute", "rewind", "volume up",
59 "forward", "play", "stop", "(earphone)"
60 };
61 #endif
62
63 struct zrc_akey {
64 int min; /* minimum ADC value or INT_MIN */
65 int key; /* remote control key number */
66 };
67
68 /* Values match the resistors in the CE-RH2 remote control. */
69 static const struct zrc_akey zrc_akeytab_c3000[] = {
70 { 238, KEY_RELEASE },
71 { 202, KEY_VOL_DOWN },
72 { 168, KEY_MUTE },
73 { 135, KEY_REWIND },
74 { 105, KEY_VOL_UP },
75 { 74, KEY_FORWARD },
76 { 42, KEY_PLAY },
77 { 12, KEY_STOP },
78 { INT_MIN, KEY_EARPHONE }
79 };
80
81 static const struct zrc_akey *zrc_akeytab = zrc_akeytab_c3000;
82
83 struct zrc_softc {
84 struct device sc_dev;
85 struct callout sc_to;
86 void *sc_ih;
87 int sc_key; /* being scanned */
88 int sc_scans; /* rescan counter */
89 int sc_noise; /* discard if too noisy? */
90 int sc_keydown; /* currently pressed key */
91 struct device *sc_wskbddev;
92 #ifdef WSDISPLAY_COMPAT_RAWKBD
93 int sc_rawkbd;
94 #endif
95 };
96
97 static int zrc_match(struct device *, struct cfdata *, void *);
98 static void zrc_attach(struct device *, struct device *, void *);
99
100 CFATTACH_DECL(zrc, sizeof(struct zrc_softc),
101 zrc_match, zrc_attach, NULL, NULL);
102
103 static int zrc_intr(void *);
104 static void zrc_timeout(void *);
105 static int zrc_scan(void);
106 static void zrc_input(struct zrc_softc *, int, int);
107
108 static int zrc_enable(void *, int);
109 static void zrc_set_leds(void *, int);
110 static int zrc_ioctl(void *, u_long, void *, int, struct lwp *);
111
112 struct wskbd_accessops zrc_accessops = {
113 zrc_enable,
114 zrc_set_leds,
115 zrc_ioctl,
116 };
117
118 #define KC(n) KS_KEYCODE(n)
119
120 /* XXX what keys should be generated in translated mode? */
121 static const keysym_t zrc_keydesc[] = {
122 KC(KEY_VOL_DOWN), KS_minus,
123 KC(KEY_MUTE), KS_m,
124 KC(KEY_REWIND), KS_b,
125 KC(KEY_VOL_UP), KS_plus,
126 KC(KEY_FORWARD), KS_f,
127 KC(KEY_PLAY), KS_p,
128 KC(KEY_STOP), KS_s,
129 };
130
131 #ifdef WSDISPLAY_COMPAT_RAWKBD
132 #define RAWKEY_AudioRewind 0xa0
133 #define RAWKEY_AudioForward 0xa1
134 #define RAWKEY_AudioPlay 0xa2
135 #define RAWKEY_AudioStop 0xa3
136 static const keysym_t zrc_xt_keymap[] = {
137 /* KC(KEY_RELEASE), */ RAWKEY_Null,
138 /* KC(KEY_VOL_DOWN), */ RAWKEY_AudioLower,
139 /* KC(KEY_MUTE), */ RAWKEY_AudioMute,
140 /* KC(KEY_REWIND), */ RAWKEY_AudioRewind,
141 /* KC(KEY_VOL_UP), */ RAWKEY_AudioRaise,
142 /* KC(KEY_FORWARD), */ RAWKEY_AudioForward,
143 /* KC(KEY_PLAY), */ RAWKEY_AudioPlay,
144 /* KC(KEY_STOP), */ RAWKEY_AudioStop,
145 };
146 #endif
147
148 static const struct wscons_keydesc zrc_keydesctab[] = {
149 {KB_US, 0, sizeof(zrc_keydesc)/sizeof(keysym_t), zrc_keydesc},
150 {0, 0, 0, 0}
151 };
152
153 struct wskbd_mapdata zrc_keymapdata = {
154 zrc_keydesctab, KB_US
155 };
156
157 #undef KC
158
159 static int
160 zrc_match(struct device *parent, struct cfdata *cf, void *aux)
161 {
162
163 if (ZAURUS_ISC3000)
164 return 1;
165 return 0;
166 }
167
168 static void
169 zrc_attach(struct device *parent, struct device *self, void *aux)
170 {
171 struct zrc_softc *sc = (struct zrc_softc *)self;
172 struct wskbddev_attach_args a;
173
174 /* Configure remote control interrupt handling. */
175 callout_init(&sc->sc_to, 0);
176 callout_setfunc(&sc->sc_to, zrc_timeout, sc);
177 pxa2x0_gpio_set_function(C3000_RC_IRQ_PIN, GPIO_IN);
178 sc->sc_ih = pxa2x0_gpio_intr_establish(C3000_RC_IRQ_PIN,
179 IST_EDGE_BOTH, IPL_BIO, zrc_intr, sc);
180
181 /* Enable the pullup while waiting for an interrupt. */
182 scoop_akin_pullup(1);
183
184 sc->sc_keydown = KEY_RELEASE;
185
186 printf(": CE-RH2 remote control\n");
187
188 a.console = 0;
189 a.keymap = &zrc_keymapdata;
190 a.accessops = &zrc_accessops;
191 a.accesscookie = sc;
192
193 sc->sc_wskbddev = config_found(self, &a, wskbddevprint);
194 }
195
196 static int
197 zrc_intr(void *v)
198 {
199 struct zrc_softc *sc = v;
200
201 /* just return if remote control isn't present */
202
203 pxa2x0_gpio_intr_mask(sc->sc_ih);
204 scoop_akin_pullup(0);
205 sc->sc_key = zrc_scan();
206 sc->sc_scans = 0;
207 sc->sc_noise = 0;
208 callout_schedule(&sc->sc_to, RESCAN_INTERVAL);
209
210 return 1;
211 }
212
213 static void
214 zrc_timeout(void *v)
215 {
216 struct zrc_softc *sc = v;
217 int key;
218
219 key = zrc_scan();
220 switch (sc->sc_scans) {
221 case 0:
222 case 1:
223 case 2:
224 /* wait for a stable read */
225 if (sc->sc_key == key)
226 sc->sc_scans++;
227 else {
228 sc->sc_key = key;
229 sc->sc_scans = 0;
230 sc->sc_noise++;
231 }
232 callout_schedule(&sc->sc_to, RESCAN_INTERVAL);
233 break;
234 case 3:
235 /* generate key press event */
236 if (sc->sc_key != key) {
237 key = sc->sc_key;
238 sc->sc_noise++;
239 }
240 sc->sc_scans++;
241 switch (key) {
242 case KEY_EARPHONE:
243 case KEY_RELEASE:
244 sc->sc_scans = 6;
245 break;
246 default:
247 #ifdef DEBUG
248 printf("%s pressed (%d noise)\n", zrc_keyname[key],
249 sc->sc_noise);
250 #endif
251 sc->sc_keydown = key;
252 sc->sc_noise = 0;
253 zrc_input(sc, key, 1);
254 break;
255 }
256 callout_schedule(&sc->sc_to, RESCAN_INTERVAL);
257 break;
258 case 4:
259 case 5:
260 /* wait for key release, permit noise */
261 if (sc->sc_key == key) {
262 if (sc->sc_scans == 5)
263 sc->sc_noise++;
264 sc->sc_scans = 4;
265 } else
266 sc->sc_scans++;
267 callout_schedule(&sc->sc_to, RESCAN_INTERVAL);
268 break;
269 case 6:
270 /* generate key release event */
271 if (sc->sc_keydown != KEY_RELEASE) {
272 zrc_input(sc, sc->sc_keydown, 0);
273 #ifdef DEBUG
274 printf("%s released (%d noise)\n",
275 zrc_keyname[sc->sc_keydown], sc->sc_noise);
276 #endif
277 sc->sc_keydown = KEY_RELEASE;
278 }
279 /* FALLTHROUGH */
280 default:
281 /* unmask interrupt again */
282 callout_stop(&sc->sc_to);
283 sc->sc_scans = 7;
284 scoop_akin_pullup(1);
285 pxa2x0_gpio_intr_unmask(sc->sc_ih);
286 }
287 }
288
289 static int
290 zrc_scan(void)
291 {
292 int val;
293 int i;
294
295 /* XXX MAX1111 command word - also appears in zaurus_apm.c */
296 #define MAXCTRL_PD0 (1<<0)
297 #define MAXCTRL_PD1 (1<<1)
298 #define MAXCTRL_SGL (1<<2)
299 #define MAXCTRL_UNI (1<<3)
300 #define MAXCTRL_SEL_SHIFT 4
301 #define MAXCTRL_STR (1<<7)
302
303 #define C3000_ADCCH_ZRC 0
304 val = zssp_read_max1111(MAXCTRL_PD0 | MAXCTRL_PD1 | MAXCTRL_SGL |
305 MAXCTRL_UNI | (C3000_ADCCH_ZRC << MAXCTRL_SEL_SHIFT) |
306 MAXCTRL_STR);
307 for (i = 0; zrc_akeytab[i].min != INT_MIN; i++)
308 if (val >= zrc_akeytab[i].min)
309 break;
310 return zrc_akeytab[i].key;
311 }
312
313 static void
314 zrc_input(struct zrc_softc *sc, int key, int down)
315 {
316 u_int type = down ? WSCONS_EVENT_KEY_DOWN : WSCONS_EVENT_KEY_UP;
317 int s;
318
319 s = spltty();
320
321 #ifdef WSDISPLAY_COMPAT_RAWKBD
322 if (sc->sc_rawkbd) {
323 int c;
324 u_char cbuf[2];
325 int ncbuf = 0;
326
327 c = zrc_xt_keymap[key];
328 if (c & 0x80)
329 cbuf[ncbuf++] = 0xe0;
330 cbuf[ncbuf] = c & 0x7f;
331
332 if (!down)
333 cbuf[ncbuf] |= 0x80;
334 ncbuf++;
335
336 wskbd_rawinput(sc->sc_wskbddev, cbuf, ncbuf);
337 } else
338 #endif
339 wskbd_input(sc->sc_wskbddev, type, key);
340
341 splx(s);
342 }
343
344 static int
345 zrc_enable(void *v, int on)
346 {
347
348 return 0;
349 }
350
351 static void
352 zrc_set_leds(void *v, int on)
353 {
354
355 /* Nothing to do */
356 }
357
358 static int
359 zrc_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
360 {
361 #ifdef WSDISPLAY_COMPAT_RAWKBD
362 struct zrc_softc *sc = v;
363 #endif
364
365 switch (cmd) {
366 case WSKBDIO_GTYPE:
367 *(int *)data = WSKBD_TYPE_ZAURUS;
368 return 0;
369 case WSKBDIO_SETLEDS:
370 return 0;
371 case WSKBDIO_GETLEDS:
372 *(int *)data = 0;
373 return 0;
374 #ifdef WSDISPLAY_COMPAT_RAWKBD
375 case WSKBDIO_SETMODE:
376 sc->sc_rawkbd = (*(int *)data == WSKBD_RAW);
377 return 0;
378 #endif
379 }
380 return EPASSTHROUGH;
381 }
382