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>
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2 of the License, or
23 * (at your option) any later version.
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, write to the Free Software
32 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/kernel.h>
39 #include <linux/string.h>
40 #include <linux/timer.h>
41 #include <linux/delay.h>
42 #include <linux/errno.h>
43 #include <linux/slab.h>
44 #include <linux/i2c.h>
45 #include <linux/i2c-id.h>
46 #include <linux/workqueue.h>
48 #include <media/ir-common.h>
49 #include <media/ir-kbd-i2c.h>
51 /* ----------------------------------------------------------------------- */
52 /* insmod parameters */
55 module_param(debug, int, 0644); /* debug level (0,1,2) */
58 module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
59 MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
62 #define DEVNAME "ir-kbd-i2c"
63 #define dprintk(level, fmt, arg...) if (debug >= level) \
64 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
66 /* ----------------------------------------------------------------------- */
68 static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
72 int start, range, toggle, dev, code, ircode;
75 if (size != i2c_master_recv(&ir->c,buf,size))
78 /* split rc5 data block ... */
79 start = (buf[offset] >> 7) & 1;
80 range = (buf[offset] >> 6) & 1;
81 toggle = (buf[offset] >> 5) & 1;
82 dev = buf[offset] & 0x1f;
83 code = (buf[offset+1] >> 2) & 0x3f;
85 /* rc5 has two start bits
86 * the first bit must be one
87 * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
93 * Hauppauge remotes (black/silver) always use
94 * specific device ids. If we do not filter the
95 * device ids then messages destined for devices
96 * such as TVs (id=0) will get through causing
99 * We also filter out invalid key presses which
100 * produce annoying debug log entries.
102 ircode= (start << 12) | (toggle << 11) | (dev << 6) | code;
103 if ((ircode & 0x1fff)==0x1fff)
104 /* invalid key press */
107 if (dev!=0x1e && dev!=0x1f)
108 /* not a hauppauge remote */
114 dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
115 start, range, toggle, dev, code);
123 static inline int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
125 return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
128 static inline int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
130 return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
133 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
138 if (1 != i2c_master_recv(&ir->c,&b,1)) {
139 dprintk(1,"read error\n");
147 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
152 if (1 != i2c_master_recv(&ir->c,&b,1)) {
153 dprintk(1,"read error\n");
160 dprintk(2,"key %02x\n", b);
167 static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
169 unsigned char buf[4];
172 if (4 != i2c_master_recv(&ir->c,buf,4)) {
173 dprintk(1,"read error\n");
177 if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
178 dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
179 buf[0], buf[1], buf[2], buf[3]);
181 /* no key pressed or signal from other ir remote */
182 if(buf[0] != 0x1 || buf[1] != 0xfe)
186 *ir_raw = (buf[2] << 8) | buf[3];
191 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
196 if (1 != i2c_master_recv(&ir->c,&b,1)) {
197 dprintk(1,"read error\n");
201 /* it seems that 0xFE indicates that a button is still hold
202 down, while 0xff indicates that no button is hold
203 down. 0xfe sequences are sometimes interrupted by 0xFF */
205 dprintk(2,"key %02x\n", b);
219 /* ----------------------------------------------------------------------- */
221 static void ir_key_poll(struct IR_i2c *ir)
223 static u32 ir_key, ir_raw;
226 dprintk(2,"ir_poll_key\n");
227 rc = ir->get_key(ir, &ir_key, &ir_raw);
229 dprintk(2,"error\n");
234 ir_input_nokey(ir->input, &ir->ir);
236 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
240 static void ir_timer(unsigned long data)
242 struct IR_i2c *ir = (struct IR_i2c*)data;
243 schedule_work(&ir->work);
246 static void ir_work(struct work_struct *work)
248 struct IR_i2c *ir = container_of(work, struct IR_i2c, work);
249 int polling_interval = 100;
251 /* MSI TV@nywhere Plus requires more frequent polling
252 otherwise it will miss some keypresses */
253 if (ir->c.adapter->id == I2C_HW_SAA7134 && ir->c.addr == 0x30)
254 polling_interval = 50;
257 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(polling_interval));
260 /* ----------------------------------------------------------------------- */
262 static int ir_attach(struct i2c_adapter *adap, int addr,
263 unsigned short flags, int kind);
264 static int ir_detach(struct i2c_client *client);
265 static int ir_probe(struct i2c_adapter *adap);
267 static struct i2c_driver driver = {
269 .name = "ir-kbd-i2c",
271 .id = I2C_DRIVERID_INFRARED,
272 .attach_adapter = ir_probe,
273 .detach_client = ir_detach,
276 static struct i2c_client client_template =
282 static int ir_attach(struct i2c_adapter *adap, int addr,
283 unsigned short flags, int kind)
285 IR_KEYTAB_TYPE *ir_codes = NULL;
289 struct input_dev *input_dev;
292 ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
293 input_dev = input_allocate_device();
294 if (!ir || !input_dev) {
299 ir->c = client_template;
300 ir->input = input_dev;
302 ir->c.adapter = adap;
305 i2c_set_clientdata(&ir->c, ir);
310 ir->get_key = get_key_pixelview;
311 ir_type = IR_TYPE_OTHER;
312 ir_codes = ir_codes_empty;
316 ir->get_key = get_key_pv951;
317 ir_type = IR_TYPE_OTHER;
318 ir_codes = ir_codes_pv951;
323 ir->get_key = get_key_haup;
324 ir_type = IR_TYPE_RC5;
325 if (hauppauge == 1) {
326 ir_codes = ir_codes_hauppauge_new;
328 ir_codes = ir_codes_rc5_tv;
333 ir->get_key = get_key_knc1;
334 ir_type = IR_TYPE_OTHER;
335 ir_codes = ir_codes_empty;
339 ir->get_key = get_key_fusionhdtv;
340 ir_type = IR_TYPE_RC5;
341 ir_codes = ir_codes_fusionhdtv_mce;
347 if (adap->id == I2C_HW_B_CX2388x) {
348 /* Handled by cx88-input */
349 name = "CX2388x remote";
350 ir_type = IR_TYPE_RC5;
351 ir->get_key = get_key_haup_xvr;
352 if (hauppauge == 1) {
353 ir_codes = ir_codes_hauppauge_new;
355 ir_codes = ir_codes_rc5_tv;
358 /* Handled by saa7134-input */
359 name = "SAA713x remote";
360 ir_type = IR_TYPE_OTHER;
364 /* shouldn't happen */
365 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n", addr);
371 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
372 ir->ir_codes = ir_codes;
374 /* register i2c device
375 * At device register, IR codes may be changed to be
378 err = i2c_attach_client(&ir->c);
382 /* If IR not supported or disabled, unregisters driver */
383 if (ir->get_key == NULL) {
388 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
389 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
390 ir->c.adapter->dev.bus_id,
393 /* init + register input device */
394 ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes);
395 input_dev->id.bustype = BUS_I2C;
396 input_dev->name = ir->c.name;
397 input_dev->phys = ir->phys;
399 err = input_register_device(ir->input);
403 printk(DEVNAME ": %s detected at %s [%s]\n",
404 ir->input->name, ir->input->phys, adap->name);
406 /* start polling via eventd */
407 INIT_WORK(&ir->work, ir_work);
408 init_timer(&ir->timer);
409 ir->timer.function = ir_timer;
410 ir->timer.data = (unsigned long)ir;
411 schedule_work(&ir->work);
416 i2c_detach_client(&ir->c);
418 input_free_device(input_dev);
423 static int ir_detach(struct i2c_client *client)
425 struct IR_i2c *ir = i2c_get_clientdata(client);
427 /* kill outstanding polls */
428 del_timer_sync(&ir->timer);
429 flush_scheduled_work();
431 /* unregister devices */
432 input_unregister_device(ir->input);
433 i2c_detach_client(&ir->c);
440 static int ir_probe(struct i2c_adapter *adap)
443 /* The external IR receiver is at i2c address 0x34 (0x35 for
444 reads). Future Hauppauge cards will have an internal
445 receiver at 0x30 (0x31 for reads). In theory, both can be
446 fitted, and Hauppauge suggest an external overrides an
449 That's why we probe 0x1a (~0x34) first. CB
452 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
453 static const int probe_saa7134[] = { 0x7a, 0x47, 0x71, 0x2d, -1 };
454 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
455 static const int probe_cx88[] = { 0x18, 0x6b, 0x71, -1 };
456 static const int probe_cx23885[] = { 0x6b, -1 };
458 struct i2c_msg msg = {
469 case I2C_HW_B_CX2341X:
473 probe = probe_saa7134;
475 case I2C_HW_B_EM28XX:
476 probe = probe_em28XX;
478 case I2C_HW_B_CX2388x:
481 case I2C_HW_B_CX23885:
482 probe = probe_cx23885;
488 for (i = 0; -1 != probe[i]; i++) {
490 rc = i2c_transfer(adap, &msg, 1);
491 dprintk(1,"probe 0x%02x @ %s: %s\n",
492 probe[i], adap->name,
493 (1 == rc) ? "yes" : "no");
495 ir_attach(adap, probe[i], 0, 0);
500 /* Special case for MSI TV@nywhere Plus remote */
501 if (adap->id == I2C_HW_SAA7134) {
504 /* MSI TV@nywhere Plus controller doesn't seem to
505 respond to probes unless we read something from
506 an existing device. Weird... */
509 rc = i2c_transfer(adap, &msg, 1);
510 dprintk(1, "probe 0x%02x @ %s: %s\n",
511 msg.addr, adap->name,
512 (1 == rc) ? "yes" : "no");
514 /* Now do the probe. The controller does not respond
515 to 0-byte reads, so we use a 1-byte read instead. */
519 rc = i2c_transfer(adap, &msg, 1);
520 dprintk(1, "probe 0x%02x @ %s: %s\n",
521 msg.addr, adap->name,
522 (1 == rc) ? "yes" : "no");
524 ir_attach(adap, msg.addr, 0, 0);
530 /* ----------------------------------------------------------------------- */
532 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
533 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
534 MODULE_LICENSE("GPL");
536 static int __init ir_init(void)
538 return i2c_add_driver(&driver);
541 static void __exit ir_fini(void)
543 i2c_del_driver(&driver);
546 module_init(ir_init);
547 module_exit(ir_fini);
550 * Overrides for Emacs so that we follow Linus's tabbing style.
551 * ---------------------------------------------------------------------------