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1da177e4 LT |
1 | /* |
2 | * $Id: ir-kbd-i2c.c,v 1.10 2004/12/09 12:51:35 kraxel Exp $ | |
3 | * | |
4 | * keyboard input driver for i2c IR remote controls | |
5 | * | |
6 | * Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org> | |
7 | * modified for PixelView (BT878P+W/FM) by | |
8 | * Michal Kochanowicz <mkochano@pld.org.pl> | |
9 | * Christoph Bartelmus <lirc@bartelmus.de> | |
10 | * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by | |
11 | * Ulrich Mueller <ulrich.mueller42@web.de> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/moduleparam.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/sched.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/timer.h> | |
36 | #include <linux/delay.h> | |
37 | #include <linux/errno.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/i2c.h> | |
40 | #include <linux/workqueue.h> | |
41 | ||
42 | #include <asm/semaphore.h> | |
43 | ||
44 | #include <media/ir-common.h> | |
45 | ||
46 | /* Mark Phalan <phalanm@o2.ie> */ | |
47 | static IR_KEYTAB_TYPE ir_codes_pv951[IR_KEYTAB_SIZE] = { | |
48 | [ 0 ] = KEY_KP0, | |
49 | [ 1 ] = KEY_KP1, | |
50 | [ 2 ] = KEY_KP2, | |
51 | [ 3 ] = KEY_KP3, | |
52 | [ 4 ] = KEY_KP4, | |
53 | [ 5 ] = KEY_KP5, | |
54 | [ 6 ] = KEY_KP6, | |
55 | [ 7 ] = KEY_KP7, | |
56 | [ 8 ] = KEY_KP8, | |
57 | [ 9 ] = KEY_KP9, | |
58 | ||
59 | [ 18 ] = KEY_POWER, | |
60 | [ 16 ] = KEY_MUTE, | |
61 | [ 31 ] = KEY_VOLUMEDOWN, | |
62 | [ 27 ] = KEY_VOLUMEUP, | |
63 | [ 26 ] = KEY_CHANNELUP, | |
64 | [ 30 ] = KEY_CHANNELDOWN, | |
65 | [ 14 ] = KEY_PAGEUP, | |
66 | [ 29 ] = KEY_PAGEDOWN, | |
67 | [ 19 ] = KEY_SOUND, | |
68 | ||
69 | [ 24 ] = KEY_KPPLUSMINUS, // CH +/- | |
70 | [ 22 ] = KEY_SUBTITLE, // CC | |
71 | [ 13 ] = KEY_TEXT, // TTX | |
72 | [ 11 ] = KEY_TV, // AIR/CBL | |
73 | [ 17 ] = KEY_PC, // PC/TV | |
74 | [ 23 ] = KEY_OK, // CH RTN | |
75 | [ 25 ] = KEY_MODE, // FUNC | |
76 | [ 12 ] = KEY_SEARCH, // AUTOSCAN | |
77 | ||
78 | /* Not sure what to do with these ones! */ | |
79 | [ 15 ] = KEY_SELECT, // SOURCE | |
80 | [ 10 ] = KEY_KPPLUS, // +100 | |
81 | [ 20 ] = KEY_KPEQUAL, // SYNC | |
82 | [ 28 ] = KEY_MEDIA, // PC/TV | |
83 | }; | |
84 | ||
85 | static IR_KEYTAB_TYPE ir_codes_purpletv[IR_KEYTAB_SIZE] = { | |
86 | [ 0x3 ] = KEY_POWER, | |
87 | [ 0x6f ] = KEY_MUTE, | |
88 | [ 0x10 ] = KEY_BACKSPACE, // Recall | |
89 | ||
90 | [ 0x11 ] = KEY_KP0, | |
91 | [ 0x4 ] = KEY_KP1, | |
92 | [ 0x5 ] = KEY_KP2, | |
93 | [ 0x6 ] = KEY_KP3, | |
94 | [ 0x8 ] = KEY_KP4, | |
95 | [ 0x9 ] = KEY_KP5, | |
96 | [ 0xa ] = KEY_KP6, | |
97 | [ 0xc ] = KEY_KP7, | |
98 | [ 0xd ] = KEY_KP8, | |
99 | [ 0xe ] = KEY_KP9, | |
100 | [ 0x12 ] = KEY_KPDOT, // 100+ | |
101 | ||
102 | [ 0x7 ] = KEY_VOLUMEUP, | |
103 | [ 0xb ] = KEY_VOLUMEDOWN, | |
104 | [ 0x1a ] = KEY_KPPLUS, | |
105 | [ 0x18 ] = KEY_KPMINUS, | |
106 | [ 0x15 ] = KEY_UP, | |
107 | [ 0x1d ] = KEY_DOWN, | |
108 | [ 0xf ] = KEY_CHANNELUP, | |
109 | [ 0x13 ] = KEY_CHANNELDOWN, | |
110 | [ 0x48 ] = KEY_ZOOM, | |
111 | ||
112 | [ 0x1b ] = KEY_VIDEO, // Video source | |
113 | #if 0 | |
114 | [ 0x1f ] = KEY_S, // Snapshot | |
115 | #endif | |
116 | [ 0x49 ] = KEY_LANGUAGE, // MTS Select | |
117 | [ 0x19 ] = KEY_SEARCH, // Auto Scan | |
118 | ||
119 | [ 0x4b ] = KEY_RECORD, | |
120 | [ 0x46 ] = KEY_PLAY, | |
121 | [ 0x45 ] = KEY_PAUSE, // Pause | |
122 | [ 0x44 ] = KEY_STOP, | |
123 | #if 0 | |
124 | [ 0x43 ] = KEY_T, // Time Shift | |
125 | [ 0x47 ] = KEY_Y, // Time Shift OFF | |
126 | [ 0x4a ] = KEY_O, // TOP | |
127 | [ 0x17 ] = KEY_F, // SURF CH | |
128 | #endif | |
129 | [ 0x40 ] = KEY_FORWARD, // Forward ? | |
130 | [ 0x42 ] = KEY_REWIND, // Backward ? | |
131 | ||
132 | }; | |
133 | ||
134 | struct IR; | |
135 | struct IR { | |
136 | struct i2c_client c; | |
137 | struct input_dev input; | |
138 | struct ir_input_state ir; | |
139 | ||
140 | struct work_struct work; | |
141 | struct timer_list timer; | |
142 | char phys[32]; | |
143 | int (*get_key)(struct IR*, u32*, u32*); | |
144 | }; | |
145 | ||
146 | /* ----------------------------------------------------------------------- */ | |
147 | /* insmod parameters */ | |
148 | ||
149 | static int debug; | |
150 | module_param(debug, int, 0644); /* debug level (0,1,2) */ | |
151 | ||
152 | #define DEVNAME "ir-kbd-i2c" | |
153 | #define dprintk(level, fmt, arg...) if (debug >= level) \ | |
154 | printk(KERN_DEBUG DEVNAME ": " fmt , ## arg) | |
155 | ||
156 | /* ----------------------------------------------------------------------- */ | |
157 | ||
158 | static int get_key_haup(struct IR *ir, u32 *ir_key, u32 *ir_raw) | |
159 | { | |
160 | unsigned char buf[3]; | |
161 | int start, toggle, dev, code; | |
162 | ||
163 | /* poll IR chip */ | |
164 | if (3 != i2c_master_recv(&ir->c,buf,3)) | |
165 | return -EIO; | |
166 | ||
167 | /* split rc5 data block ... */ | |
168 | start = (buf[0] >> 6) & 3; | |
169 | toggle = (buf[0] >> 5) & 1; | |
170 | dev = buf[0] & 0x1f; | |
171 | code = (buf[1] >> 2) & 0x3f; | |
172 | ||
173 | if (3 != start) | |
174 | /* no key pressed */ | |
175 | return 0; | |
176 | dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n", | |
177 | start, toggle, dev, code); | |
178 | ||
179 | /* return key */ | |
180 | *ir_key = code; | |
181 | *ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code; | |
182 | return 1; | |
183 | } | |
184 | ||
185 | static int get_key_pixelview(struct IR *ir, u32 *ir_key, u32 *ir_raw) | |
186 | { | |
187 | unsigned char b; | |
188 | ||
189 | /* poll IR chip */ | |
190 | if (1 != i2c_master_recv(&ir->c,&b,1)) { | |
191 | dprintk(1,"read error\n"); | |
192 | return -EIO; | |
193 | } | |
194 | *ir_key = b; | |
195 | *ir_raw = b; | |
196 | return 1; | |
197 | } | |
198 | ||
199 | static int get_key_pv951(struct IR *ir, u32 *ir_key, u32 *ir_raw) | |
200 | { | |
201 | unsigned char b; | |
202 | ||
203 | /* poll IR chip */ | |
204 | if (1 != i2c_master_recv(&ir->c,&b,1)) { | |
205 | dprintk(1,"read error\n"); | |
206 | return -EIO; | |
207 | } | |
208 | ||
209 | /* ignore 0xaa */ | |
210 | if (b==0xaa) | |
211 | return 0; | |
212 | dprintk(2,"key %02x\n", b); | |
213 | ||
214 | *ir_key = b; | |
215 | *ir_raw = b; | |
216 | return 1; | |
217 | } | |
218 | ||
219 | static int get_key_knc1(struct IR *ir, u32 *ir_key, u32 *ir_raw) | |
220 | { | |
221 | unsigned char b; | |
222 | ||
223 | /* poll IR chip */ | |
224 | if (1 != i2c_master_recv(&ir->c,&b,1)) { | |
225 | dprintk(1,"read error\n"); | |
226 | return -EIO; | |
227 | } | |
228 | ||
229 | /* it seems that 0xFE indicates that a button is still hold | |
230 | down, while 0xFF indicates that no button is hold | |
231 | down. 0xFE sequences are sometimes interrupted by 0xFF */ | |
232 | ||
233 | dprintk(2,"key %02x\n", b); | |
234 | ||
235 | if (b == 0xFF) | |
236 | return 0; | |
237 | ||
238 | if (b == 0xFE) | |
239 | /* keep old data */ | |
240 | return 1; | |
241 | ||
242 | *ir_key = b; | |
243 | *ir_raw = b; | |
244 | return 1; | |
245 | } | |
246 | ||
247 | static int get_key_purpletv(struct IR *ir, u32 *ir_key, u32 *ir_raw) | |
248 | { | |
249 | unsigned char b; | |
250 | ||
251 | /* poll IR chip */ | |
252 | if (1 != i2c_master_recv(&ir->c,&b,1)) { | |
253 | dprintk(1,"read error\n"); | |
254 | return -EIO; | |
255 | } | |
256 | ||
257 | /* no button press */ | |
258 | if (b==0) | |
259 | return 0; | |
260 | ||
261 | /* repeating */ | |
262 | if (b & 0x80) | |
263 | return 1; | |
264 | ||
265 | *ir_key = b; | |
266 | *ir_raw = b; | |
267 | return 1; | |
268 | } | |
269 | /* ----------------------------------------------------------------------- */ | |
270 | ||
271 | static void ir_key_poll(struct IR *ir) | |
272 | { | |
273 | static u32 ir_key, ir_raw; | |
274 | int rc; | |
275 | ||
276 | dprintk(2,"ir_poll_key\n"); | |
277 | rc = ir->get_key(ir, &ir_key, &ir_raw); | |
278 | if (rc < 0) { | |
279 | dprintk(2,"error\n"); | |
280 | return; | |
281 | } | |
282 | ||
283 | if (0 == rc) { | |
284 | ir_input_nokey(&ir->input,&ir->ir); | |
285 | } else { | |
286 | ir_input_keydown(&ir->input,&ir->ir, ir_key, ir_raw); | |
287 | } | |
288 | } | |
289 | ||
290 | static void ir_timer(unsigned long data) | |
291 | { | |
292 | struct IR *ir = (struct IR*)data; | |
293 | schedule_work(&ir->work); | |
294 | } | |
295 | ||
296 | static void ir_work(void *data) | |
297 | { | |
298 | struct IR *ir = data; | |
299 | ir_key_poll(ir); | |
300 | mod_timer(&ir->timer, jiffies+HZ/10); | |
301 | } | |
302 | ||
303 | /* ----------------------------------------------------------------------- */ | |
304 | ||
305 | static int ir_attach(struct i2c_adapter *adap, int addr, | |
306 | unsigned short flags, int kind); | |
307 | static int ir_detach(struct i2c_client *client); | |
308 | static int ir_probe(struct i2c_adapter *adap); | |
309 | ||
310 | static struct i2c_driver driver = { | |
311 | .name = "ir remote kbd driver", | |
312 | .id = I2C_DRIVERID_EXP3, /* FIXME */ | |
313 | .flags = I2C_DF_NOTIFY, | |
314 | .attach_adapter = ir_probe, | |
315 | .detach_client = ir_detach, | |
316 | }; | |
317 | ||
318 | static struct i2c_client client_template = | |
319 | { | |
320 | I2C_DEVNAME("unset"), | |
321 | .driver = &driver | |
322 | }; | |
323 | ||
324 | static int ir_attach(struct i2c_adapter *adap, int addr, | |
325 | unsigned short flags, int kind) | |
326 | { | |
327 | IR_KEYTAB_TYPE *ir_codes = NULL; | |
328 | char *name; | |
329 | int ir_type; | |
330 | struct IR *ir; | |
331 | ||
332 | if (NULL == (ir = kmalloc(sizeof(struct IR),GFP_KERNEL))) | |
333 | return -ENOMEM; | |
334 | memset(ir,0,sizeof(*ir)); | |
335 | ir->c = client_template; | |
336 | ||
337 | i2c_set_clientdata(&ir->c, ir); | |
338 | ir->c.adapter = adap; | |
339 | ir->c.addr = addr; | |
340 | ||
341 | switch(addr) { | |
342 | case 0x64: | |
343 | name = "Pixelview"; | |
344 | ir->get_key = get_key_pixelview; | |
345 | ir_type = IR_TYPE_OTHER; | |
346 | ir_codes = ir_codes_empty; | |
347 | break; | |
348 | case 0x4b: | |
349 | name = "PV951"; | |
350 | ir->get_key = get_key_pv951; | |
351 | ir_type = IR_TYPE_OTHER; | |
352 | ir_codes = ir_codes_pv951; | |
353 | break; | |
354 | case 0x18: | |
355 | case 0x1a: | |
356 | name = "Hauppauge"; | |
357 | ir->get_key = get_key_haup; | |
358 | ir_type = IR_TYPE_RC5; | |
359 | ir_codes = ir_codes_rc5_tv; | |
360 | break; | |
361 | case 0x30: | |
362 | name = "KNC One"; | |
363 | ir->get_key = get_key_knc1; | |
364 | ir_type = IR_TYPE_OTHER; | |
365 | ir_codes = ir_codes_empty; | |
366 | break; | |
367 | case 0x7a: | |
368 | name = "Purple TV"; | |
369 | ir->get_key = get_key_purpletv; | |
370 | ir_type = IR_TYPE_OTHER; | |
371 | ir_codes = ir_codes_purpletv; | |
372 | break; | |
373 | default: | |
374 | /* shouldn't happen */ | |
375 | printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr); | |
376 | kfree(ir); | |
377 | return -1; | |
378 | } | |
379 | ||
380 | /* register i2c device */ | |
381 | i2c_attach_client(&ir->c); | |
382 | snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name); | |
383 | snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0", | |
384 | ir->c.adapter->dev.bus_id, | |
385 | ir->c.dev.bus_id); | |
386 | ||
387 | /* init + register input device */ | |
388 | ir_input_init(&ir->input,&ir->ir,ir_type,ir_codes); | |
389 | ir->input.id.bustype = BUS_I2C; | |
390 | ir->input.name = ir->c.name; | |
391 | ir->input.phys = ir->phys; | |
392 | input_register_device(&ir->input); | |
393 | printk(DEVNAME ": %s detected at %s [%s]\n", | |
394 | ir->input.name,ir->input.phys,adap->name); | |
395 | ||
396 | /* start polling via eventd */ | |
397 | INIT_WORK(&ir->work, ir_work, ir); | |
398 | init_timer(&ir->timer); | |
399 | ir->timer.function = ir_timer; | |
400 | ir->timer.data = (unsigned long)ir; | |
401 | schedule_work(&ir->work); | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | static int ir_detach(struct i2c_client *client) | |
407 | { | |
408 | struct IR *ir = i2c_get_clientdata(client); | |
409 | ||
410 | /* kill outstanding polls */ | |
411 | del_timer(&ir->timer); | |
412 | flush_scheduled_work(); | |
413 | ||
414 | /* unregister devices */ | |
415 | input_unregister_device(&ir->input); | |
416 | i2c_detach_client(&ir->c); | |
417 | ||
418 | /* free memory */ | |
419 | kfree(ir); | |
420 | return 0; | |
421 | } | |
422 | ||
423 | static int ir_probe(struct i2c_adapter *adap) | |
424 | { | |
425 | ||
426 | /* The external IR receiver is at i2c address 0x34 (0x35 for | |
427 | reads). Future Hauppauge cards will have an internal | |
428 | receiver at 0x30 (0x31 for reads). In theory, both can be | |
429 | fitted, and Hauppauge suggest an external overrides an | |
430 | internal. | |
431 | ||
432 | That's why we probe 0x1a (~0x34) first. CB | |
433 | */ | |
434 | ||
435 | static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1}; | |
436 | static const int probe_saa7134[] = { 0x7a, -1 }; | |
437 | const int *probe = NULL; | |
438 | struct i2c_client c; char buf; int i,rc; | |
439 | ||
440 | switch (adap->id) { | |
441 | case I2C_ALGO_BIT | I2C_HW_B_BT848: | |
442 | probe = probe_bttv; | |
443 | break; | |
444 | case I2C_ALGO_SAA7134: | |
445 | probe = probe_saa7134; | |
446 | break; | |
447 | } | |
448 | if (NULL == probe) | |
449 | return 0; | |
450 | ||
451 | memset(&c,0,sizeof(c)); | |
452 | c.adapter = adap; | |
453 | for (i = 0; -1 != probe[i]; i++) { | |
454 | c.addr = probe[i]; | |
455 | rc = i2c_master_recv(&c,&buf,1); | |
456 | dprintk(1,"probe 0x%02x @ %s: %s\n", | |
457 | probe[i], adap->name, | |
458 | (1 == rc) ? "yes" : "no"); | |
459 | if (1 == rc) { | |
460 | ir_attach(adap,probe[i],0,0); | |
461 | break; | |
462 | } | |
463 | } | |
464 | return 0; | |
465 | } | |
466 | ||
467 | /* ----------------------------------------------------------------------- */ | |
468 | ||
469 | MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller"); | |
470 | MODULE_DESCRIPTION("input driver for i2c IR remote controls"); | |
471 | MODULE_LICENSE("GPL"); | |
472 | ||
473 | static int __init ir_init(void) | |
474 | { | |
475 | return i2c_add_driver(&driver); | |
476 | } | |
477 | ||
478 | static void __exit ir_fini(void) | |
479 | { | |
480 | i2c_del_driver(&driver); | |
481 | } | |
482 | ||
483 | module_init(ir_init); | |
484 | module_exit(ir_fini); | |
485 | ||
486 | /* | |
487 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
488 | * --------------------------------------------------------------------------- | |
489 | * Local variables: | |
490 | * c-basic-offset: 8 | |
491 | * End: | |
492 | */ |