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 remote kbd driver",
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) {
308 input_free_device(input_dev);
312 ir->c = client_template;
313 ir->input = input_dev;
315 i2c_set_clientdata(&ir->c, ir);
316 ir->c.adapter = adap;
322 ir->get_key = get_key_pixelview;
323 ir_type = IR_TYPE_OTHER;
324 ir_codes = ir_codes_empty;
328 ir->get_key = get_key_pv951;
329 ir_type = IR_TYPE_OTHER;
330 ir_codes = ir_codes_pv951;
335 ir->get_key = get_key_haup;
336 ir_type = IR_TYPE_RC5;
337 ir_codes = ir_codes_rc5_tv;
341 ir->get_key = get_key_knc1;
342 ir_type = IR_TYPE_OTHER;
343 ir_codes = ir_codes_empty;
347 /* Handled by saa7134-input */
348 name = "SAA713x remote";
349 ir_type = IR_TYPE_OTHER;
352 /* shouldn't happen */
353 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
359 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
360 ir->ir_codes=ir_codes;
362 /* register i2c device
363 * At device register, IR codes may be changed to be
366 i2c_attach_client(&ir->c);
368 /* If IR not supported or disabled, unregisters driver */
369 if (ir->get_key == NULL) {
370 i2c_detach_client(&ir->c);
375 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
376 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
377 ir->c.adapter->dev.bus_id,
380 /* init + register input device */
381 ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
382 input_dev->id.bustype = BUS_I2C;
383 input_dev->name = ir->c.name;
384 input_dev->phys = ir->phys;
386 /* register event device */
387 input_register_device(ir->input);
389 /* start polling via eventd */
390 INIT_WORK(&ir->work, ir_work, ir);
391 init_timer(&ir->timer);
392 ir->timer.function = ir_timer;
393 ir->timer.data = (unsigned long)ir;
394 schedule_work(&ir->work);
399 static int ir_detach(struct i2c_client *client)
401 struct IR_i2c *ir = i2c_get_clientdata(client);
403 /* kill outstanding polls */
404 del_timer(&ir->timer);
405 flush_scheduled_work();
407 /* unregister devices */
408 input_unregister_device(ir->input);
409 i2c_detach_client(&ir->c);
416 static int ir_probe(struct i2c_adapter *adap)
419 /* The external IR receiver is at i2c address 0x34 (0x35 for
420 reads). Future Hauppauge cards will have an internal
421 receiver at 0x30 (0x31 for reads). In theory, both can be
422 fitted, and Hauppauge suggest an external overrides an
425 That's why we probe 0x1a (~0x34) first. CB
428 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
429 static const int probe_saa7134[] = { 0x7a, 0x47, -1 };
430 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
431 const int *probe = NULL;
441 probe = probe_saa7134;
443 case I2C_HW_B_EM28XX:
444 probe = probe_em28XX;
450 memset(&c,0,sizeof(c));
452 for (i = 0; -1 != probe[i]; i++) {
454 rc = i2c_master_recv(&c,&buf,0);
455 dprintk(1,"probe 0x%02x @ %s: %s\n",
456 probe[i], adap->name,
457 (0 == rc) ? "yes" : "no");
459 ir_attach(adap,probe[i],0,0);
466 /* ----------------------------------------------------------------------- */
468 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
469 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
470 MODULE_LICENSE("GPL");
472 static int __init ir_init(void)
474 return i2c_add_driver(&driver);
477 static void __exit ir_fini(void)
479 i2c_del_driver(&driver);
482 module_init(ir_init);
483 module_exit(ir_fini);
486 * Overrides for Emacs so that we follow Linus's tabbing style.
487 * ---------------------------------------------------------------------------