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>
13 * modified for DViCO Fusion HDTV 5 RT GOLD by
14 * Chaogui Zhang <czhang1974@gmail.com>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 #include <linux/module.h>
33 #include <linux/init.h>
34 #include <linux/kernel.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/i2c-id.h>
42 #include <linux/workqueue.h>
43 #include <asm/semaphore.h>
45 #include <media/ir-common.h>
46 #include <media/ir-kbd-i2c.h>
48 /* ----------------------------------------------------------------------- */
49 /* insmod parameters */
52 module_param(debug, int, 0644); /* debug level (0,1,2) */
54 static int hauppauge = 0;
55 module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
56 MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
59 #define DEVNAME "ir-kbd-i2c"
60 #define dprintk(level, fmt, arg...) if (debug >= level) \
61 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
63 /* ----------------------------------------------------------------------- */
65 static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
69 int start, range, toggle, dev, code;
72 if (size != i2c_master_recv(&ir->c,buf,size))
75 /* split rc5 data block ... */
76 start = (buf[offset] >> 7) & 1;
77 range = (buf[offset] >> 6) & 1;
78 toggle = (buf[offset] >> 5) & 1;
79 dev = buf[offset] & 0x1f;
80 code = (buf[offset+1] >> 2) & 0x3f;
82 /* rc5 has two start bits
83 * the first bit must be one
84 * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
93 dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
94 start, range, toggle, dev, code);
98 *ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
102 static inline int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
104 return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
107 static inline int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
109 return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
112 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
117 if (1 != i2c_master_recv(&ir->c,&b,1)) {
118 dprintk(1,"read error\n");
126 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
131 if (1 != i2c_master_recv(&ir->c,&b,1)) {
132 dprintk(1,"read error\n");
139 dprintk(2,"key %02x\n", b);
146 static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
148 unsigned char buf[4];
151 if (4 != i2c_master_recv(&ir->c,buf,4)) {
152 dprintk(1,"read error\n");
156 if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
157 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __FUNCTION__,
158 buf[0], buf[1], buf[2], buf[3]);
160 /* no key pressed or signal from other ir remote */
161 if(buf[0] != 0x1 || buf[1] != 0xfe)
165 *ir_raw = (buf[2] << 8) | buf[3];
170 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
175 if (1 != i2c_master_recv(&ir->c,&b,1)) {
176 dprintk(1,"read error\n");
180 /* it seems that 0xFE indicates that a button is still hold
181 down, while 0xff indicates that no button is hold
182 down. 0xfe sequences are sometimes interrupted by 0xFF */
184 dprintk(2,"key %02x\n", b);
198 /* Common (grey or coloured) pinnacle PCTV remote handling
201 static int get_key_pinnacle(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
202 int parity_offset, int marker, int code_modulo)
205 unsigned int start = 0,parity = 0,code = 0;
208 if (4 != i2c_master_recv(&ir->c,b,4)) {
209 dprintk(2,"read error\n");
213 for (start = 0; start < ARRAY_SIZE(b); start++) {
214 if (b[start] == marker) {
215 code=b[(start+parity_offset+1)%4];
216 parity=b[(start+parity_offset)%4];
225 if (ir->old == parity)
230 /* drop special codes when a key is held down a long time for the grey controller
231 In this case, the second bit of the code is asserted */
232 if (marker == 0xfe && (code & 0x40))
240 dprintk(1,"Pinnacle PCTV key %02x\n", code);
245 /* The grey pinnacle PCTV remote
247 * There are one issue with this remote:
248 * - I2c packet does not change when the same key is pressed quickly. The workaround
249 * is to hold down each key for about half a second, so that another code is generated
250 * in the i2c packet, and the function can distinguish key presses.
252 * Sylvain Pasche <sylvain.pasche@gmail.com>
254 int get_key_pinnacle_grey(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
257 return get_key_pinnacle(ir, ir_key, ir_raw, 1, 0xfe, 0xff);
260 EXPORT_SYMBOL_GPL(get_key_pinnacle_grey);
263 /* The new pinnacle PCTV remote (with the colored buttons)
265 * Ricardo Cerqueira <v4l@cerqueira.org>
267 int get_key_pinnacle_color(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
269 /* code_modulo parameter (0x88) is used to reduce code value to fit inside IR_KEYTAB_SIZE
271 * this is the only value that results in 42 unique
275 return get_key_pinnacle(ir, ir_key, ir_raw, 2, 0x80, 0x88);
278 EXPORT_SYMBOL_GPL(get_key_pinnacle_color);
280 /* ----------------------------------------------------------------------- */
282 static void ir_key_poll(struct IR_i2c *ir)
284 static u32 ir_key, ir_raw;
287 dprintk(2,"ir_poll_key\n");
288 rc = ir->get_key(ir, &ir_key, &ir_raw);
290 dprintk(2,"error\n");
295 ir_input_nokey(ir->input, &ir->ir);
297 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
301 static void ir_timer(unsigned long data)
303 struct IR_i2c *ir = (struct IR_i2c*)data;
304 schedule_work(&ir->work);
307 static void ir_work(struct work_struct *work)
309 struct IR_i2c *ir = container_of(work, struct IR_i2c, work);
312 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(100));
315 /* ----------------------------------------------------------------------- */
317 static int ir_attach(struct i2c_adapter *adap, int addr,
318 unsigned short flags, int kind);
319 static int ir_detach(struct i2c_client *client);
320 static int ir_probe(struct i2c_adapter *adap);
322 static struct i2c_driver driver = {
324 .name = "ir-kbd-i2c",
326 .id = I2C_DRIVERID_INFRARED,
327 .attach_adapter = ir_probe,
328 .detach_client = ir_detach,
331 static struct i2c_client client_template =
337 static int ir_attach(struct i2c_adapter *adap, int addr,
338 unsigned short flags, int kind)
340 IR_KEYTAB_TYPE *ir_codes = NULL;
344 struct input_dev *input_dev;
347 ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
348 input_dev = input_allocate_device();
349 if (!ir || !input_dev) {
354 ir->c = client_template;
355 ir->input = input_dev;
357 ir->c.adapter = adap;
360 i2c_set_clientdata(&ir->c, ir);
365 ir->get_key = get_key_pixelview;
366 ir_type = IR_TYPE_OTHER;
367 ir_codes = ir_codes_empty;
371 ir->get_key = get_key_pv951;
372 ir_type = IR_TYPE_OTHER;
373 ir_codes = ir_codes_pv951;
378 ir->get_key = get_key_haup;
379 ir_type = IR_TYPE_RC5;
380 if (hauppauge == 1) {
381 ir_codes = ir_codes_hauppauge_new;
383 ir_codes = ir_codes_rc5_tv;
388 ir->get_key = get_key_knc1;
389 ir_type = IR_TYPE_OTHER;
390 ir_codes = ir_codes_empty;
394 ir->get_key = get_key_fusionhdtv;
395 ir_type = IR_TYPE_RC5;
396 ir_codes = ir_codes_fusionhdtv_mce;
401 if (adap->id == I2C_HW_B_CX2388x) {
402 /* Handled by cx88-input */
403 name = "CX2388x remote";
404 ir_type = IR_TYPE_RC5;
405 ir->get_key = get_key_haup_xvr;
406 if (hauppauge == 1) {
407 ir_codes = ir_codes_hauppauge_new;
409 ir_codes = ir_codes_rc5_tv;
412 /* Handled by saa7134-input */
413 name = "SAA713x remote";
414 ir_type = IR_TYPE_OTHER;
418 /* shouldn't happen */
419 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n", addr);
425 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
426 ir->ir_codes = ir_codes;
428 /* register i2c device
429 * At device register, IR codes may be changed to be
432 err = i2c_attach_client(&ir->c);
436 /* If IR not supported or disabled, unregisters driver */
437 if (ir->get_key == NULL) {
442 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
443 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
444 ir->c.adapter->dev.bus_id,
447 /* init + register input device */
448 ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes);
449 input_dev->id.bustype = BUS_I2C;
450 input_dev->name = ir->c.name;
451 input_dev->phys = ir->phys;
453 err = input_register_device(ir->input);
457 printk(DEVNAME ": %s detected at %s [%s]\n",
458 ir->input->name, ir->input->phys, adap->name);
460 /* start polling via eventd */
461 INIT_WORK(&ir->work, ir_work);
462 init_timer(&ir->timer);
463 ir->timer.function = ir_timer;
464 ir->timer.data = (unsigned long)ir;
465 schedule_work(&ir->work);
470 i2c_detach_client(&ir->c);
472 input_free_device(input_dev);
477 static int ir_detach(struct i2c_client *client)
479 struct IR_i2c *ir = i2c_get_clientdata(client);
481 /* kill outstanding polls */
482 del_timer_sync(&ir->timer);
483 flush_scheduled_work();
485 /* unregister devices */
486 input_unregister_device(ir->input);
487 i2c_detach_client(&ir->c);
494 static int ir_probe(struct i2c_adapter *adap)
497 /* The external IR receiver is at i2c address 0x34 (0x35 for
498 reads). Future Hauppauge cards will have an internal
499 receiver at 0x30 (0x31 for reads). In theory, both can be
500 fitted, and Hauppauge suggest an external overrides an
503 That's why we probe 0x1a (~0x34) first. CB
506 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
507 static const int probe_saa7134[] = { 0x7a, 0x47, 0x71, -1 };
508 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
509 static const int probe_cx88[] = { 0x18, 0x6b, 0x71, -1 };
510 static const int probe_cx23885[] = { 0x6b, -1 };
511 const int *probe = NULL;
520 case I2C_HW_B_CX2341X:
524 probe = probe_saa7134;
526 case I2C_HW_B_EM28XX:
527 probe = probe_em28XX;
529 case I2C_HW_B_CX2388x:
532 case I2C_HW_B_CX23885:
533 probe = probe_cx23885;
539 memset(&c,0,sizeof(c));
541 for (i = 0; -1 != probe[i]; i++) {
543 rc = i2c_master_recv(&c,&buf,0);
544 dprintk(1,"probe 0x%02x @ %s: %s\n",
545 probe[i], adap->name,
546 (0 == rc) ? "yes" : "no");
548 ir_attach(adap,probe[i],0,0);
555 /* ----------------------------------------------------------------------- */
557 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
558 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
559 MODULE_LICENSE("GPL");
561 static int __init ir_init(void)
563 return i2c_add_driver(&driver);
566 static void __exit ir_fini(void)
568 i2c_del_driver(&driver);
571 module_init(ir_init);
572 module_exit(ir_fini);
575 * Overrides for Emacs so that we follow Linus's tabbing style.
576 * ---------------------------------------------------------------------------