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 /* ----------------------------------------------------------------------- */
48 /* insmod parameters */
51 module_param(debug, int, 0644); /* debug level (0,1,2) */
53 static int hauppauge = 0;
54 module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
55 MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
58 #define DEVNAME "ir-kbd-i2c"
59 #define dprintk(level, fmt, arg...) if (debug >= level) \
60 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
62 /* ----------------------------------------------------------------------- */
64 static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
67 int start, toggle, dev, code;
70 if (3 != i2c_master_recv(&ir->c,buf,3))
73 /* split rc5 data block ... */
74 start = (buf[0] >> 6) & 3;
75 toggle = (buf[0] >> 5) & 1;
77 code = (buf[1] >> 2) & 0x3f;
82 dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
83 start, toggle, dev, code);
87 *ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
91 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
96 if (1 != i2c_master_recv(&ir->c,&b,1)) {
97 dprintk(1,"read error\n");
105 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
110 if (1 != i2c_master_recv(&ir->c,&b,1)) {
111 dprintk(1,"read error\n");
118 dprintk(2,"key %02x\n", b);
125 static int get_key_knc1(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");
135 /* it seems that 0xFE indicates that a button is still hold
136 down, while 0xff indicates that no button is hold
137 down. 0xfe sequences are sometimes interrupted by 0xFF */
139 dprintk(2,"key %02x\n", b);
153 /* The new pinnacle PCTV remote (with the colored buttons)
155 * Ricardo Cerqueira <v4l@cerqueira.org>
158 int get_key_pinnacle(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
161 unsigned int start = 0,parity = 0,code = 0;
164 if (4 != i2c_master_recv(&ir->c,b,4)) {
165 dprintk(2,"read error\n");
169 for (start = 0; start<4; start++) {
170 if (b[start] == 0x80) {
172 parity=b[(start+2)%4];
181 if (ir->old == parity)
187 /* Reduce code value to fit inside IR_KEYTAB_SIZE
189 * this is the only value that results in 42 unique
198 dprintk(1,"Pinnacle PCTV key %02x\n", code);
203 EXPORT_SYMBOL_GPL(get_key_pinnacle);
205 /* ----------------------------------------------------------------------- */
207 static void ir_key_poll(struct IR_i2c *ir)
209 static u32 ir_key, ir_raw;
212 dprintk(2,"ir_poll_key\n");
213 rc = ir->get_key(ir, &ir_key, &ir_raw);
215 dprintk(2,"error\n");
220 ir_input_nokey(ir->input, &ir->ir);
222 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
226 static void ir_timer(unsigned long data)
228 struct IR_i2c *ir = (struct IR_i2c*)data;
229 schedule_work(&ir->work);
232 static void ir_work(void *data)
234 struct IR_i2c *ir = data;
236 mod_timer(&ir->timer, jiffies+HZ/10);
239 /* ----------------------------------------------------------------------- */
241 static int ir_attach(struct i2c_adapter *adap, int addr,
242 unsigned short flags, int kind);
243 static int ir_detach(struct i2c_client *client);
244 static int ir_probe(struct i2c_adapter *adap);
246 static struct i2c_driver driver = {
248 .name = "ir-kbd-i2c",
250 .id = I2C_DRIVERID_INFRARED,
251 .attach_adapter = ir_probe,
252 .detach_client = ir_detach,
255 static struct i2c_client client_template =
261 static int ir_attach(struct i2c_adapter *adap, int addr,
262 unsigned short flags, int kind)
264 IR_KEYTAB_TYPE *ir_codes = NULL;
268 struct input_dev *input_dev;
270 ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
271 input_dev = input_allocate_device();
272 if (!ir || !input_dev) {
273 input_free_device(input_dev);
277 memset(ir,0,sizeof(*ir));
279 ir->c = client_template;
280 ir->input = input_dev;
282 ir->c.adapter = adap;
285 i2c_set_clientdata(&ir->c, ir);
290 ir->get_key = get_key_pixelview;
291 ir_type = IR_TYPE_OTHER;
292 ir_codes = ir_codes_empty;
296 ir->get_key = get_key_pv951;
297 ir_type = IR_TYPE_OTHER;
298 ir_codes = ir_codes_pv951;
303 ir->get_key = get_key_haup;
304 ir_type = IR_TYPE_RC5;
305 if (hauppauge == 1) {
306 ir_codes = ir_codes_hauppauge_new;
308 ir_codes = ir_codes_rc5_tv;
313 ir->get_key = get_key_knc1;
314 ir_type = IR_TYPE_OTHER;
315 ir_codes = ir_codes_empty;
319 /* Handled by saa7134-input */
320 name = "SAA713x remote";
321 ir_type = IR_TYPE_OTHER;
324 /* shouldn't happen */
325 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
331 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
332 ir->ir_codes=ir_codes;
334 /* register i2c device
335 * At device register, IR codes may be changed to be
338 i2c_attach_client(&ir->c);
340 /* If IR not supported or disabled, unregisters driver */
341 if (ir->get_key == NULL) {
342 i2c_detach_client(&ir->c);
347 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
348 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
349 ir->c.adapter->dev.bus_id,
352 /* init + register input device */
353 ir_input_init(input_dev,&ir->ir,ir_type,ir->ir_codes);
354 input_dev->id.bustype = BUS_I2C;
355 input_dev->name = ir->c.name;
356 input_dev->phys = ir->phys;
358 /* register event device */
359 input_register_device(ir->input);
360 printk(DEVNAME ": %s detected at %s [%s]\n",
361 ir->input->name,ir->input->phys,adap->name);
363 /* start polling via eventd */
364 INIT_WORK(&ir->work, ir_work, ir);
365 init_timer(&ir->timer);
366 ir->timer.function = ir_timer;
367 ir->timer.data = (unsigned long)ir;
368 schedule_work(&ir->work);
373 static int ir_detach(struct i2c_client *client)
375 struct IR_i2c *ir = i2c_get_clientdata(client);
377 /* kill outstanding polls */
378 del_timer(&ir->timer);
379 flush_scheduled_work();
381 /* unregister devices */
382 input_unregister_device(ir->input);
383 i2c_detach_client(&ir->c);
390 static int ir_probe(struct i2c_adapter *adap)
393 /* The external IR receiver is at i2c address 0x34 (0x35 for
394 reads). Future Hauppauge cards will have an internal
395 receiver at 0x30 (0x31 for reads). In theory, both can be
396 fitted, and Hauppauge suggest an external overrides an
399 That's why we probe 0x1a (~0x34) first. CB
402 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
403 static const int probe_saa7134[] = { 0x7a, 0x47, -1 };
404 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
405 const int *probe = NULL;
415 probe = probe_saa7134;
417 case I2C_HW_B_EM28XX:
418 probe = probe_em28XX;
424 memset(&c,0,sizeof(c));
426 for (i = 0; -1 != probe[i]; i++) {
428 rc = i2c_master_recv(&c,&buf,0);
429 dprintk(1,"probe 0x%02x @ %s: %s\n",
430 probe[i], adap->name,
431 (0 == rc) ? "yes" : "no");
433 ir_attach(adap,probe[i],0,0);
440 /* ----------------------------------------------------------------------- */
442 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
443 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
444 MODULE_LICENSE("GPL");
446 static int __init ir_init(void)
448 return i2c_add_driver(&driver);
451 static void __exit ir_fini(void)
453 i2c_del_driver(&driver);
456 module_init(ir_init);
457 module_exit(ir_fini);
460 * Overrides for Emacs so that we follow Linus's tabbing style.
461 * ---------------------------------------------------------------------------