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>
43 #include <media/ir-common.h>
44 #include <media/ir-kbd-i2c.h>
46 /* Mark Phalan <phalanm@o2.ie> */
47 static IR_KEYTAB_TYPE ir_codes_pv951[IR_KEYTAB_SIZE] = {
61 [ 31 ] = KEY_VOLUMEDOWN,
62 [ 27 ] = KEY_VOLUMEUP,
63 [ 26 ] = KEY_CHANNELUP,
64 [ 30 ] = KEY_CHANNELDOWN,
66 [ 29 ] = KEY_PAGEDOWN,
69 [ 24 ] = KEY_KPPLUSMINUS, /* CH +/- */
70 [ 22 ] = KEY_SUBTITLE, /* CC */
71 [ 13 ] = KEY_TEXT, /* TTX */
72 [ 11 ] = KEY_TV, /* AIR/CBL */
73 [ 17 ] = KEY_PC, /* PC/TV */
74 [ 23 ] = KEY_OK, /* CH RTN */
75 [ 25 ] = KEY_MODE, /* FUNC */
76 [ 12 ] = KEY_SEARCH, /* AUTOSCAN */
78 /* Not sure what to do with these ones! */
79 [ 15 ] = KEY_SELECT, /* SOURCE */
80 [ 10 ] = KEY_KPPLUS, /* +100 */
81 [ 20 ] = KEY_KPEQUAL, /* SYNC */
82 [ 28 ] = KEY_MEDIA, /* PC/TV */
85 /* ----------------------------------------------------------------------- */
86 /* insmod parameters */
89 module_param(debug, int, 0644); /* debug level (0,1,2) */
91 #define DEVNAME "ir-kbd-i2c"
92 #define dprintk(level, fmt, arg...) if (debug >= level) \
93 printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
95 /* ----------------------------------------------------------------------- */
97 static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
100 int start, toggle, dev, code;
103 if (3 != i2c_master_recv(&ir->c,buf,3))
106 /* split rc5 data block ... */
107 start = (buf[0] >> 6) & 3;
108 toggle = (buf[0] >> 5) & 1;
110 code = (buf[1] >> 2) & 0x3f;
115 dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
116 start, toggle, dev, code);
120 *ir_raw = (start << 12) | (toggle << 11) | (dev << 6) | code;
124 static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
129 if (1 != i2c_master_recv(&ir->c,&b,1)) {
130 dprintk(1,"read error\n");
138 static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
143 if (1 != i2c_master_recv(&ir->c,&b,1)) {
144 dprintk(1,"read error\n");
151 dprintk(2,"key %02x\n", b);
158 static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
163 if (1 != i2c_master_recv(&ir->c,&b,1)) {
164 dprintk(1,"read error\n");
168 /* it seems that 0xFE indicates that a button is still hold
169 down, while 0xff indicates that no button is hold
170 down. 0xfe sequences are sometimes interrupted by 0xFF */
172 dprintk(2,"key %02x\n", b);
186 /* The new pinnacle PCTV remote (with the colored buttons)
188 * Ricardo Cerqueira <v4l@cerqueira.org>
191 int get_key_pinnacle(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
194 unsigned int start = 0,parity = 0,code = 0;
197 if (4 != i2c_master_recv(&ir->c,b,4)) {
198 dprintk(2,"read error\n");
202 for (start = 0; start<4; start++) {
203 if (b[start] == 0x80) {
205 parity=b[(start+2)%4];
214 if (ir->old == parity)
220 /* Reduce code value to fit inside IR_KEYTAB_SIZE
222 * this is the only value that results in 42 unique
231 dprintk(1,"Pinnacle PCTV key %02x\n", code);
236 EXPORT_SYMBOL_GPL(get_key_pinnacle);
238 /* ----------------------------------------------------------------------- */
240 static void ir_key_poll(struct IR_i2c *ir)
242 static u32 ir_key, ir_raw;
245 dprintk(2,"ir_poll_key\n");
246 rc = ir->get_key(ir, &ir_key, &ir_raw);
248 dprintk(2,"error\n");
253 ir_input_nokey(ir->input, &ir->ir);
255 ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
259 static void ir_timer(unsigned long data)
261 struct IR_i2c *ir = (struct IR_i2c*)data;
262 schedule_work(&ir->work);
265 static void ir_work(void *data)
267 struct IR_i2c *ir = data;
269 mod_timer(&ir->timer, jiffies+HZ/10);
272 /* ----------------------------------------------------------------------- */
274 static int ir_attach(struct i2c_adapter *adap, int addr,
275 unsigned short flags, int kind);
276 static int ir_detach(struct i2c_client *client);
277 static int ir_probe(struct i2c_adapter *adap);
279 static struct i2c_driver driver = {
280 .name = "ir remote kbd driver",
281 .id = I2C_DRIVERID_EXP3, /* FIXME */
282 .flags = I2C_DF_NOTIFY,
283 .attach_adapter = ir_probe,
284 .detach_client = ir_detach,
287 static struct i2c_client client_template =
293 static int ir_attach(struct i2c_adapter *adap, int addr,
294 unsigned short flags, int kind)
296 IR_KEYTAB_TYPE *ir_codes = NULL;
300 struct input_dev *input_dev;
302 ir = kzalloc(sizeof(struct IR_i2c), GFP_KERNEL);
303 input_dev = input_allocate_device();
304 if (!ir || !input_dev) {
306 input_free_device(input_dev);
310 ir->c = client_template;
311 ir->input = input_dev;
313 i2c_set_clientdata(&ir->c, ir);
314 ir->c.adapter = adap;
320 ir->get_key = get_key_pixelview;
321 ir_type = IR_TYPE_OTHER;
322 ir_codes = ir_codes_empty;
326 ir->get_key = get_key_pv951;
327 ir_type = IR_TYPE_OTHER;
328 ir_codes = ir_codes_pv951;
333 ir->get_key = get_key_haup;
334 ir_type = IR_TYPE_RC5;
335 ir_codes = ir_codes_rc5_tv;
339 ir->get_key = get_key_knc1;
340 ir_type = IR_TYPE_OTHER;
341 ir_codes = ir_codes_empty;
345 /* Handled by saa7134-input */
346 name = "SAA713x remote";
347 ir_type = IR_TYPE_OTHER;
350 /* shouldn't happen */
351 printk(DEVNAME ": Huh? unknown i2c address (0x%02x)?\n",addr);
357 snprintf(ir->c.name, sizeof(ir->c.name), "i2c IR (%s)", name);
358 ir->ir_codes=ir_codes;
360 /* register i2c device
361 * At device register, IR codes may be changed to be
364 i2c_attach_client(&ir->c);
366 /* If IR not supported or disabled, unregisters driver */
367 if (ir->get_key == NULL) {
368 i2c_detach_client(&ir->c);
373 /* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
374 snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
375 ir->c.adapter->dev.bus_id,
378 /* init + register input device */
379 ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
380 input_dev->id.bustype = BUS_I2C;
381 input_dev->name = ir->c.name;
382 input_dev->phys = ir->phys;
384 /* register event device */
385 input_register_device(ir->input);
387 /* start polling via eventd */
388 INIT_WORK(&ir->work, ir_work, ir);
389 init_timer(&ir->timer);
390 ir->timer.function = ir_timer;
391 ir->timer.data = (unsigned long)ir;
392 schedule_work(&ir->work);
397 static int ir_detach(struct i2c_client *client)
399 struct IR_i2c *ir = i2c_get_clientdata(client);
401 /* kill outstanding polls */
402 del_timer(&ir->timer);
403 flush_scheduled_work();
405 /* unregister devices */
406 input_unregister_device(ir->input);
407 i2c_detach_client(&ir->c);
414 static int ir_probe(struct i2c_adapter *adap)
417 /* The external IR receiver is at i2c address 0x34 (0x35 for
418 reads). Future Hauppauge cards will have an internal
419 receiver at 0x30 (0x31 for reads). In theory, both can be
420 fitted, and Hauppauge suggest an external overrides an
423 That's why we probe 0x1a (~0x34) first. CB
426 static const int probe_bttv[] = { 0x1a, 0x18, 0x4b, 0x64, 0x30, -1};
427 static const int probe_saa7134[] = { 0x7a, 0x47, -1 };
428 static const int probe_em28XX[] = { 0x30, 0x47, -1 };
429 const int *probe = NULL;
439 probe = probe_saa7134;
441 case I2C_HW_B_EM28XX:
442 probe = probe_em28XX;
448 memset(&c,0,sizeof(c));
450 for (i = 0; -1 != probe[i]; i++) {
452 rc = i2c_master_recv(&c,&buf,0);
453 dprintk(1,"probe 0x%02x @ %s: %s\n",
454 probe[i], adap->name,
455 (0 == rc) ? "yes" : "no");
457 ir_attach(adap,probe[i],0,0);
464 /* ----------------------------------------------------------------------- */
466 MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
467 MODULE_DESCRIPTION("input driver for i2c IR remote controls");
468 MODULE_LICENSE("GPL");
470 static int __init ir_init(void)
472 return i2c_add_driver(&driver);
475 static void __exit ir_fini(void)
477 i2c_del_driver(&driver);
480 module_init(ir_init);
481 module_exit(ir_fini);
484 * Overrides for Emacs so that we follow Linus's tabbing style.
485 * ---------------------------------------------------------------------------