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>
15 * modified for MSI TV@nywhere Plus by
16 * Henry Wong <henry@stuffedcow.net>
17 * Mark Schultz <n9xmj@yahoo.com>
18 * Brian Rogers <brian_rogers@comcast.net>
19 * modified for AVerMedia Cardbus by
20 * Oldrich Jedlicka <oldium.pro@seznam.cz>
22 * This program is free software; you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License as published by
24 * the Free Software Foundation; either version 2 of the License, or
25 * (at your option) any later version.
27 * This program is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 * GNU General Public License for more details.
32 * You should have received a copy of the GNU General Public License
33 * along with this program; if not, write to the Free Software
34 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/kernel.h>
41 #include <linux/string.h>
42 #include <linux/timer.h>
43 #include <linux/delay.h>
44 #include <linux/errno.h>
45 #include <linux/slab.h>
46 #include <linux/i2c.h>
47 #include <linux/i2c-id.h>
48 #include <linux/workqueue.h>
50 #include <media/ir-common.h>
51 #include <media/ir-kbd-i2c.h>
53 /* ----------------------------------------------------------------------- */
54 /* insmod parameters */
57 module_param(debug, int, 0644); /* debug level (0,1,2) */
60 module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
61 MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
64 #define DEVNAME "ir-kbd-i2c"
65 #define dprintk(level, fmt, arg...) if (debug >= level) \
66 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
68 /* ----------------------------------------------------------------------- */
70 static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
74 int start, range, toggle, dev, code, ircode;
77 if (size != i2c_master_recv(&ir->c,buf,size))
80 /* split rc5 data block ... */
81 start = (buf[offset] >> 7) & 1;
82 range = (buf[offset] >> 6) & 1;
83 toggle = (buf[offset] >> 5) & 1;
84 dev = buf[offset] & 0x1f;
85 code = (buf[offset+1] >> 2) & 0x3f;
87 /* rc5 has two start bits
88 * the first bit must be one
89 * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
95 * Hauppauge remotes (black/silver) always use
96 * specific device ids. If we do not filter the
97 * device ids then messages destined for devices
98 * such as TVs (id=0) will get through causing
101 * We also filter out invalid key presses which
102 * produce annoying debug log entries.
104 ircode= (start << 12) | (toggle << 11) | (dev << 6) | code;
105 if ((ircode & 0x1fff)==0x1fff)
106 /* invalid key press */
109 if (dev!=0x1e && dev!=0x1f)
110 /* not a hauppauge remote */
116 dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
117 start, range, toggle, dev, code);
125 static inline int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
127 return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
130 static inline int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
132 return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
135 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
140 if (1 != i2c_master_recv(&ir->c,&b,1)) {
141 dprintk(1,"read error\n");
149 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
154 if (1 != i2c_master_recv(&ir->c,&b,1)) {
155 dprintk(1,"read error\n");
162 dprintk(2,"key %02x\n", b);
169 static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
171 unsigned char buf[4];
174 if (4 != i2c_master_recv(&ir->c,buf,4)) {
175 dprintk(1,"read error\n");
179 if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
180 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
181 buf[0], buf[1], buf[2], buf[3]);
183 /* no key pressed or signal from other ir remote */
184 if(buf[0] != 0x1 || buf[1] != 0xfe)
188 *ir_raw = (buf[2] << 8) | buf[3];
193 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
198 if (1 != i2c_master_recv(&ir->c,&b,1)) {
199 dprintk(1,"read error\n");
203 /* it seems that 0xFE indicates that a button is still hold
204 down, while 0xff indicates that no button is hold
205 down. 0xfe sequences are sometimes interrupted by 0xFF */
207 dprintk(2,"key %02x\n", b);
221 static int get_key_avermedia_cardbus(struct IR_i2c *ir,
222 u32 *ir_key, u32 *ir_raw)
224 unsigned char subaddr, key, keygroup;
225 struct i2c_msg msg[] = { { .addr = ir->c.addr, .flags = 0,
226 .buf = &subaddr, .len = 1},
227 { .addr = ir->c.addr, .flags = I2C_M_RD,
228 .buf = &key, .len = 1} };
230 if (2 != i2c_transfer(ir->c.adapter, msg, 2)) {
231 dprintk(1, "read error\n");
239 msg[1].buf = &keygroup;
240 if (2 != i2c_transfer(ir->c.adapter, msg, 2)) {
241 dprintk(1, "read error\n");
245 if (keygroup == 0xff)
248 dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
249 if (keygroup < 2 || keygroup > 3) {
251 dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
254 key |= (keygroup & 1) << 6;
261 /* ----------------------------------------------------------------------- */
263 static void ir_key_poll(struct IR_i2c *ir)
265 static u32 ir_key, ir_raw;
268 dprintk(2,"ir_poll_key\n");
269 rc = ir->get_key(ir, &ir_key, &ir_raw);
271 dprintk(2,"error\n");
276 ir_input_nokey(ir->input, &ir->ir);
278 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
282 static void ir_work(struct work_struct *work)
284 struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
285 int polling_interval = 100;
287 /* MSI TV@nywhere Plus requires more frequent polling
288 otherwise it will miss some keypresses */
289 if (ir->c.adapter->id == I2C_HW_SAA7134 && ir->c.addr == 0x30)
290 polling_interval = 50;
293 schedule_delayed_work(&ir->work, msecs_to_jiffies(polling_interval));
296 /* ----------------------------------------------------------------------- */
298 static int ir_attach(struct i2c_adapter *adap, int addr,
299 unsigned short flags, int kind);
300 static int ir_detach(struct i2c_client *client);
301 static int ir_probe(struct i2c_adapter *adap);
303 static struct i2c_driver driver = {
305 .name = "ir-kbd-i2c",
307 .id = I2C_DRIVERID_INFRARED,
308 .attach_adapter = ir_probe,
309 .detach_client = ir_detach,
312 static struct i2c_client client_template =
318 static int ir_attach(struct i2c_adapter *adap, int addr,
319 unsigned short flags, int kind)
321 IR_KEYTAB_TYPE *ir_codes = NULL;
325 struct input_dev *input_dev;
328 ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
329 input_dev = input_allocate_device();
330 if (!ir || !input_dev) {
335 ir->c = client_template;
336 ir->input = input_dev;
338 ir->c.adapter = adap;
341 i2c_set_clientdata(&ir->c, ir);
346 ir->get_key = get_key_pixelview;
347 ir_type = IR_TYPE_OTHER;
348 ir_codes = ir_codes_empty;
352 ir->get_key = get_key_pv951;
353 ir_type = IR_TYPE_OTHER;
354 ir_codes = ir_codes_pv951;
359 ir->get_key = get_key_haup;
360 ir_type = IR_TYPE_RC5;
361 if (hauppauge == 1) {
362 ir_codes = ir_codes_hauppauge_new;
364 ir_codes = ir_codes_rc5_tv;
369 ir->get_key = get_key_knc1;
370 ir_type = IR_TYPE_OTHER;
371 ir_codes = ir_codes_empty;
375 ir->get_key = get_key_fusionhdtv;
376 ir_type = IR_TYPE_RC5;
377 ir_codes = ir_codes_fusionhdtv_mce;
383 if (adap->id == I2C_HW_B_CX2388x) {
384 /* Handled by cx88-input */
385 name = "CX2388x remote";
386 ir_type = IR_TYPE_RC5;
387 ir->get_key = get_key_haup_xvr;
388 if (hauppauge == 1) {
389 ir_codes = ir_codes_hauppauge_new;
391 ir_codes = ir_codes_rc5_tv;
394 /* Handled by saa7134-input */
395 name = "SAA713x remote";
396 ir_type = IR_TYPE_OTHER;
400 name = "AVerMedia Cardbus remote";
401 ir->get_key = get_key_avermedia_cardbus;
402 ir_type = IR_TYPE_OTHER;
403 ir_codes = ir_codes_avermedia_cardbus;
406 /* shouldn't happen */
407 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n", addr);
413 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
414 ir->ir_codes = ir_codes;
416 /* register i2c device
417 * At device register, IR codes may be changed to be
420 err = i2c_attach_client(&ir->c);
424 /* If IR not supported or disabled, unregisters driver */
425 if (ir->get_key == NULL) {
430 /* Phys addr can only be set after attaching (for ir->c.dev) */
431 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
432 dev_name(&ir->c.adapter->dev),
433 dev_name(&ir->c.dev));
435 /* init + register input device */
436 ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes);
437 input_dev->id.bustype = BUS_I2C;
438 input_dev->name = ir->c.name;
439 input_dev->phys = ir->phys;
441 err = input_register_device(ir->input);
445 printk(DEVNAME ": %s detected at %s [%s]\n",
446 ir->input->name, ir->input->phys, adap->name);
448 /* start polling via eventd */
449 INIT_DELAYED_WORK(&ir->work, ir_work);
450 schedule_delayed_work(&ir->work, 0);
455 i2c_detach_client(&ir->c);
457 input_free_device(input_dev);
462 static int ir_detach(struct i2c_client *client)
464 struct IR_i2c *ir = i2c_get_clientdata(client);
466 /* kill outstanding polls */
467 cancel_delayed_work_sync(&ir->work);
469 /* unregister devices */
470 input_unregister_device(ir->input);
471 i2c_detach_client(&ir->c);
478 static int ir_probe(struct i2c_adapter *adap)
481 /* The external IR receiver is at i2c address 0x34 (0x35 for
482 reads). Future Hauppauge cards will have an internal
483 receiver at 0x30 (0x31 for reads). In theory, both can be
484 fitted, and Hauppauge suggest an external overrides an
487 That's why we probe 0x1a (~0x34) first. CB
490 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
491 static const int probe_saa7134[] = { 0x7a, 0x47, 0x71, 0x2d, -1 };
492 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
493 static const int probe_cx88[] = { 0x18, 0x6b, 0x71, -1 };
494 static const int probe_cx23885[] = { 0x6b, -1 };
496 struct i2c_msg msg = {
507 case I2C_HW_B_CX2341X:
511 probe = probe_saa7134;
513 case I2C_HW_B_EM28XX:
514 probe = probe_em28XX;
516 case I2C_HW_B_CX2388x:
519 case I2C_HW_B_CX23885:
520 probe = probe_cx23885;
526 for (i = 0; -1 != probe[i]; i++) {
528 rc = i2c_transfer(adap, &msg, 1);
529 dprintk(1,"probe 0x%02x @ %s: %s\n",
530 probe[i], adap->name,
531 (1 == rc) ? "yes" : "no");
533 ir_attach(adap, probe[i], 0, 0);
538 /* Special case for MSI TV@nywhere Plus remote */
539 if (adap->id == I2C_HW_SAA7134) {
542 /* MSI TV@nywhere Plus controller doesn't seem to
543 respond to probes unless we read something from
544 an existing device. Weird... */
547 rc = i2c_transfer(adap, &msg, 1);
548 dprintk(1, "probe 0x%02x @ %s: %s\n",
549 msg.addr, adap->name,
550 (1 == rc) ? "yes" : "no");
552 /* Now do the probe. The controller does not respond
553 to 0-byte reads, so we use a 1-byte read instead. */
557 rc = i2c_transfer(adap, &msg, 1);
558 dprintk(1, "probe 0x%02x @ %s: %s\n",
559 msg.addr, adap->name,
560 (1 == rc) ? "yes" : "no");
562 ir_attach(adap, msg.addr, 0, 0);
565 /* Special case for AVerMedia Cardbus remote */
566 if (adap->id == I2C_HW_SAA7134) {
567 unsigned char subaddr, data;
568 struct i2c_msg msg[] = { { .addr = 0x40, .flags = 0,
569 .buf = &subaddr, .len = 1},
570 { .addr = 0x40, .flags = I2C_M_RD,
571 .buf = &data, .len = 1} };
573 rc = i2c_transfer(adap, msg, 2);
574 dprintk(1, "probe 0x%02x/0x%02x @ %s: %s\n",
575 msg[0].addr, subaddr, adap->name,
576 (2 == rc) ? "yes" : "no");
578 ir_attach(adap, msg[0].addr, 0, 0);
584 /* ----------------------------------------------------------------------- */
586 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
587 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
588 MODULE_LICENSE("GPL");
590 static int __init ir_init(void)
592 return i2c_add_driver(&driver);
595 static void __exit ir_fini(void)
597 i2c_del_driver(&driver);
600 module_init(ir_init);
601 module_exit(ir_fini);
604 * Overrides for Emacs so that we follow Linus's tabbing style.
605 * ---------------------------------------------------------------------------