3 * keyboard input driver for i2c IR remote controls
5 * Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
6 * modified for PixelView (BT878P+W/FM) by
7 * Michal Kochanowicz <mkochano@pld.org.pl>
8 * Christoph Bartelmus <lirc@bartelmus.de>
9 * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
10 * Ulrich Mueller <ulrich.mueller42@web.de>
11 * modified for em2820 based USB TV tuners by
12 * Markus Rechberger <mrechberger@gmail.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include <linux/module.h>
31 #include <linux/moduleparam.h>
32 #include <linux/init.h>
33 #include <linux/kernel.h>
34 #include <linux/sched.h>
35 #include <linux/string.h>
36 #include <linux/timer.h>
37 #include <linux/delay.h>
38 #include <linux/errno.h>
39 #include <linux/slab.h>
40 #include <linux/i2c.h>
41 #include <linux/workqueue.h>
42 #include <asm/semaphore.h>
44 #include <media/ir-common.h>
45 #include <media/ir-kbd-i2c.h>
47 /* Mark Phalan <phalanm@o2.ie> */
48 static IR_KEYTAB_TYPE ir_codes_pv951[IR_KEYTAB_SIZE] = {
62 [ 31 ] = KEY_VOLUMEDOWN,
63 [ 27 ] = KEY_VOLUMEUP,
64 [ 26 ] = KEY_CHANNELUP,
65 [ 30 ] = KEY_CHANNELDOWN,
67 [ 29 ] = KEY_PAGEDOWN,
70 [ 24 ] = KEY_KPPLUSMINUS, /* CH +/- */
71 [ 22 ] = KEY_SUBTITLE, /* CC */
72 [ 13 ] = KEY_TEXT, /* TTX */
73 [ 11 ] = KEY_TV, /* AIR/CBL */
74 [ 17 ] = KEY_PC, /* PC/TV */
75 [ 23 ] = KEY_OK, /* CH RTN */
76 [ 25 ] = KEY_MODE, /* FUNC */
77 [ 12 ] = KEY_SEARCH, /* AUTOSCAN */
79 /* Not sure what to do with these ones! */
80 [ 15 ] = KEY_SELECT, /* SOURCE */
81 [ 10 ] = KEY_KPPLUS, /* +100 */
82 [ 20 ] = KEY_KPEQUAL, /* SYNC */
83 [ 28 ] = KEY_MEDIA, /* PC/TV */
86 /* ----------------------------------------------------------------------- */
87 /* insmod parameters */
90 module_param(debug, int, 0644); /* debug level (0,1,2) */
92 #define DEVNAME "ir-kbd-i2c"
93 #define dprintk(level, fmt, arg...) if (debug >= level) \
94 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
96 /* ----------------------------------------------------------------------- */
98 static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
100 unsigned char buf[3];
101 int start, toggle, dev, code;
104 if (3 != i2c_master_recv(&ir->c,buf,3))
107 /* split rc5 data block ... */
108 start = (buf[0] >> 6) & 3;
109 toggle = (buf[0] >> 5) & 1;
111 code = (buf[1] >> 2) & 0x3f;
116 dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
117 start, toggle, dev, code);
121 *ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
125 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
130 if (1 != i2c_master_recv(&ir->c,&b,1)) {
131 dprintk(1,"read error\n");
139 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
144 if (1 != i2c_master_recv(&ir->c,&b,1)) {
145 dprintk(1,"read error\n");
152 dprintk(2,"key %02x\n", b);
159 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
164 if (1 != i2c_master_recv(&ir->c,&b,1)) {
165 dprintk(1,"read error\n");
169 /* it seems that 0xFE indicates that a button is still hold
170 down, while 0xff indicates that no button is hold
171 down. 0xfe sequences are sometimes interrupted by 0xFF */
173 dprintk(2,"key %02x\n", b);
187 /* The new pinnacle PCTV remote (with the colored buttons)
189 * Ricardo Cerqueira <v4l@cerqueira.org>
192 int get_key_pinnacle(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
195 unsigned int start = 0,parity = 0,code = 0;
198 if (4 != i2c_master_recv(&ir->c,b,4)) {
199 dprintk(2,"read error\n");
203 for (start = 0; start<4; start++) {
204 if (b[start] == 0x80) {
206 parity=b[(start+2)%4];
215 if (ir->old == parity)
221 /* Reduce code value to fit inside IR_KEYTAB_SIZE
223 * this is the only value that results in 42 unique
232 dprintk(1,"Pinnacle PCTV key %02x\n", code);
237 EXPORT_SYMBOL_GPL(get_key_pinnacle);
239 /* ----------------------------------------------------------------------- */
241 static void ir_key_poll(struct IR_i2c *ir)
243 static u32 ir_key, ir_raw;
246 dprintk(2,"ir_poll_key\n");
247 rc = ir->get_key(ir, &ir_key, &ir_raw);
249 dprintk(2,"error\n");
254 ir_input_nokey(ir->input, &ir->ir);
256 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
260 static void ir_timer(unsigned long data)
262 struct IR_i2c *ir = (struct IR_i2c*)data;
263 schedule_work(&ir->work);
266 static void ir_work(void *data)
268 struct IR_i2c *ir = data;
270 mod_timer(&ir->timer, jiffies+HZ/10);
273 /* ----------------------------------------------------------------------- */
275 static int ir_attach(struct i2c_adapter *adap, int addr,
276 unsigned short flags, int kind);
277 static int ir_detach(struct i2c_client *client);
278 static int ir_probe(struct i2c_adapter *adap);
280 static struct i2c_driver driver = {
282 .name = "ir-kbd-i2c",
284 .id = I2C_DRIVERID_INFRARED,
285 .attach_adapter = ir_probe,
286 .detach_client = ir_detach,
289 static struct i2c_client client_template =
295 static int ir_attach(struct i2c_adapter *adap, int addr,
296 unsigned short flags, int kind)
298 IR_KEYTAB_TYPE *ir_codes = NULL;
302 struct input_dev *input_dev;
304 ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
305 input_dev = input_allocate_device();
306 if (!ir || !input_dev) {
307 input_free_device(input_dev);
311 memset(ir,0,sizeof(*ir));
313 ir->c = client_template;
314 ir->input = input_dev;
316 ir->c.adapter = adap;
319 i2c_set_clientdata(&ir->c, ir);
324 ir->get_key = get_key_pixelview;
325 ir_type = IR_TYPE_OTHER;
326 ir_codes = ir_codes_empty;
330 ir->get_key = get_key_pv951;
331 ir_type = IR_TYPE_OTHER;
332 ir_codes = ir_codes_pv951;
337 ir->get_key = get_key_haup;
338 ir_type = IR_TYPE_RC5;
339 ir_codes = ir_codes_rc5_tv;
343 ir->get_key = get_key_knc1;
344 ir_type = IR_TYPE_OTHER;
345 ir_codes = ir_codes_empty;
349 /* Handled by saa7134-input */
350 name = "SAA713x remote";
351 ir_type = IR_TYPE_OTHER;
354 /* shouldn't happen */
355 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
361 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
362 ir->ir_codes=ir_codes;
364 /* register i2c device
365 * At device register, IR codes may be changed to be
368 i2c_attach_client(&ir->c);
370 /* If IR not supported or disabled, unregisters driver */
371 if (ir->get_key == NULL) {
372 i2c_detach_client(&ir->c);
377 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
378 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
379 ir->c.adapter->dev.bus_id,
382 /* init + register input device */
383 ir_input_init(input_dev,&ir->ir,ir_type,ir->ir_codes);
384 input_dev->id.bustype = BUS_I2C;
385 input_dev->name = ir->c.name;
386 input_dev->phys = ir->phys;
388 /* register event device */
389 input_register_device(ir->input);
390 printk(DEVNAME ": %s detected at %s [%s]\n",
391 ir->input->name,ir->input->phys,adap->name);
393 /* start polling via eventd */
394 INIT_WORK(&ir->work, ir_work, ir);
395 init_timer(&ir->timer);
396 ir->timer.function = ir_timer;
397 ir->timer.data = (unsigned long)ir;
398 schedule_work(&ir->work);
403 static int ir_detach(struct i2c_client *client)
405 struct IR_i2c *ir = i2c_get_clientdata(client);
407 /* kill outstanding polls */
408 del_timer(&ir->timer);
409 flush_scheduled_work();
411 /* unregister devices */
412 input_unregister_device(ir->input);
413 i2c_detach_client(&ir->c);
420 static int ir_probe(struct i2c_adapter *adap)
423 /* The external IR receiver is at i2c address 0x34 (0x35 for
424 reads). Future Hauppauge cards will have an internal
425 receiver at 0x30 (0x31 for reads). In theory, both can be
426 fitted, and Hauppauge suggest an external overrides an
429 That's why we probe 0x1a (~0x34) first. CB
432 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
433 static const int probe_saa7134[] = { 0x7a, 0x47, -1 };
434 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
435 const int *probe = NULL;
445 probe = probe_saa7134;
447 case I2C_HW_B_EM28XX:
448 probe = probe_em28XX;
454 memset(&c,0,sizeof(c));
456 for (i = 0; -1 != probe[i]; i++) {
458 rc = i2c_master_recv(&c,&buf,0);
459 dprintk(1,"probe 0x%02x @ %s: %s\n",
460 probe[i], adap->name,
461 (0 == rc) ? "yes" : "no");
463 ir_attach(adap,probe[i],0,0);
470 /* ----------------------------------------------------------------------- */
472 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
473 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
474 MODULE_LICENSE("GPL");
476 static int __init ir_init(void)
478 return i2c_add_driver(&driver);
481 static void __exit ir_fini(void)
483 i2c_del_driver(&driver);
486 module_init(ir_init);
487 module_exit(ir_fini);
490 * Overrides for Emacs so that we follow Linus's tabbing style.
491 * ---------------------------------------------------------------------------